1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright (c) 1991, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright (c) 1990 Mentat Inc.
25 * Copyright (c) 2012 Joyent, Inc. All rights reserved.
26 */
27
28 #include <sys/types.h>
29 #include <sys/stream.h>
30 #include <sys/dlpi.h>
31 #include <sys/stropts.h>
32 #include <sys/sysmacros.h>
33 #include <sys/strsubr.h>
34 #include <sys/strlog.h>
35 #include <sys/strsun.h>
36 #include <sys/zone.h>
37 #define _SUN_TPI_VERSION 2
38 #include <sys/tihdr.h>
39 #include <sys/xti_inet.h>
40 #include <sys/ddi.h>
41 #include <sys/suntpi.h>
42 #include <sys/cmn_err.h>
43 #include <sys/debug.h>
44 #include <sys/kobj.h>
45 #include <sys/modctl.h>
46 #include <sys/atomic.h>
47 #include <sys/policy.h>
48 #include <sys/priv.h>
49 #include <sys/taskq.h>
50
51 #include <sys/systm.h>
52 #include <sys/param.h>
53 #include <sys/kmem.h>
54 #include <sys/sdt.h>
55 #include <sys/socket.h>
56 #include <sys/vtrace.h>
57 #include <sys/isa_defs.h>
58 #include <sys/mac.h>
59 #include <net/if.h>
60 #include <net/if_arp.h>
61 #include <net/route.h>
62 #include <sys/sockio.h>
63 #include <netinet/in.h>
64 #include <net/if_dl.h>
65
66 #include <inet/common.h>
67 #include <inet/mi.h>
68 #include <inet/mib2.h>
69 #include <inet/nd.h>
70 #include <inet/arp.h>
71 #include <inet/snmpcom.h>
72 #include <inet/optcom.h>
73 #include <inet/kstatcom.h>
74
75 #include <netinet/igmp_var.h>
76 #include <netinet/ip6.h>
77 #include <netinet/icmp6.h>
78 #include <netinet/sctp.h>
79
80 #include <inet/ip.h>
81 #include <inet/ip_impl.h>
82 #include <inet/ip6.h>
83 #include <inet/ip6_asp.h>
84 #include <inet/tcp.h>
85 #include <inet/tcp_impl.h>
86 #include <inet/ip_multi.h>
87 #include <inet/ip_if.h>
88 #include <inet/ip_ire.h>
89 #include <inet/ip_ftable.h>
90 #include <inet/ip_rts.h>
91 #include <inet/ip_ndp.h>
92 #include <inet/ip_listutils.h>
93 #include <netinet/igmp.h>
94 #include <netinet/ip_mroute.h>
95 #include <inet/ipp_common.h>
96
97 #include <net/pfkeyv2.h>
98 #include <inet/sadb.h>
99 #include <inet/ipsec_impl.h>
100 #include <inet/iptun/iptun_impl.h>
101 #include <inet/ipdrop.h>
102 #include <inet/ip_netinfo.h>
103 #include <inet/ilb_ip.h>
104
105 #include <sys/ethernet.h>
106 #include <net/if_types.h>
107 #include <sys/cpuvar.h>
108
109 #include <ipp/ipp.h>
110 #include <ipp/ipp_impl.h>
111 #include <ipp/ipgpc/ipgpc.h>
112
113 #include <sys/pattr.h>
114 #include <inet/ipclassifier.h>
115 #include <inet/sctp_ip.h>
116 #include <inet/sctp/sctp_impl.h>
117 #include <inet/udp_impl.h>
118 #include <inet/rawip_impl.h>
119 #include <inet/rts_impl.h>
120
121 #include <sys/tsol/label.h>
122 #include <sys/tsol/tnet.h>
123
124 #include <sys/squeue_impl.h>
125 #include <inet/ip_arp.h>
126
127 #include <sys/clock_impl.h> /* For LBOLT_FASTPATH{,64} */
128
129 /*
130 * Values for squeue switch:
131 * IP_SQUEUE_ENTER_NODRAIN: SQ_NODRAIN
132 * IP_SQUEUE_ENTER: SQ_PROCESS
133 * IP_SQUEUE_FILL: SQ_FILL
134 */
135 int ip_squeue_enter = IP_SQUEUE_ENTER; /* Setable in /etc/system */
136
137 int ip_squeue_flag;
138
139 /*
140 * Setable in /etc/system
141 */
142 int ip_poll_normal_ms = 100;
143 int ip_poll_normal_ticks = 0;
144 int ip_modclose_ackwait_ms = 3000;
145
146 /*
147 * It would be nice to have these present only in DEBUG systems, but the
148 * current design of the global symbol checking logic requires them to be
149 * unconditionally present.
150 */
151 uint_t ip_thread_data; /* TSD key for debug support */
152 krwlock_t ip_thread_rwlock;
153 list_t ip_thread_list;
154
155 /*
156 * Structure to represent a linked list of msgblks. Used by ip_snmp_ functions.
157 */
158
159 struct listptr_s {
160 mblk_t *lp_head; /* pointer to the head of the list */
161 mblk_t *lp_tail; /* pointer to the tail of the list */
162 };
163
164 typedef struct listptr_s listptr_t;
165
166 /*
167 * This is used by ip_snmp_get_mib2_ip_route_media and
168 * ip_snmp_get_mib2_ip6_route_media to carry the lists of return data.
169 */
170 typedef struct iproutedata_s {
171 uint_t ird_idx;
172 uint_t ird_flags; /* see below */
173 listptr_t ird_route; /* ipRouteEntryTable */
174 listptr_t ird_netmedia; /* ipNetToMediaEntryTable */
175 listptr_t ird_attrs; /* ipRouteAttributeTable */
176 } iproutedata_t;
177
178 /* Include ire_testhidden and IRE_IF_CLONE routes */
179 #define IRD_REPORT_ALL 0x01
180
181 /*
182 * Cluster specific hooks. These should be NULL when booted as a non-cluster
183 */
184
185 /*
186 * Hook functions to enable cluster networking
187 * On non-clustered systems these vectors must always be NULL.
188 *
189 * Hook function to Check ip specified ip address is a shared ip address
190 * in the cluster
191 *
192 */
193 int (*cl_inet_isclusterwide)(netstackid_t stack_id, uint8_t protocol,
194 sa_family_t addr_family, uint8_t *laddrp, void *args) = NULL;
195
196 /*
197 * Hook function to generate cluster wide ip fragment identifier
198 */
199 uint32_t (*cl_inet_ipident)(netstackid_t stack_id, uint8_t protocol,
200 sa_family_t addr_family, uint8_t *laddrp, uint8_t *faddrp,
201 void *args) = NULL;
202
203 /*
204 * Hook function to generate cluster wide SPI.
205 */
206 void (*cl_inet_getspi)(netstackid_t, uint8_t, uint8_t *, size_t,
207 void *) = NULL;
208
209 /*
210 * Hook function to verify if the SPI is already utlized.
211 */
212
213 int (*cl_inet_checkspi)(netstackid_t, uint8_t, uint32_t, void *) = NULL;
214
215 /*
216 * Hook function to delete the SPI from the cluster wide repository.
217 */
218
219 void (*cl_inet_deletespi)(netstackid_t, uint8_t, uint32_t, void *) = NULL;
220
221 /*
222 * Hook function to inform the cluster when packet received on an IDLE SA
223 */
224
225 void (*cl_inet_idlesa)(netstackid_t, uint8_t, uint32_t, sa_family_t,
226 in6_addr_t, in6_addr_t, void *) = NULL;
227
228 /*
229 * Synchronization notes:
230 *
231 * IP is a fully D_MP STREAMS module/driver. Thus it does not depend on any
232 * MT level protection given by STREAMS. IP uses a combination of its own
233 * internal serialization mechanism and standard Solaris locking techniques.
234 * The internal serialization is per phyint. This is used to serialize
235 * plumbing operations, IPMP operations, most set ioctls, etc.
236 *
237 * Plumbing is a long sequence of operations involving message
238 * exchanges between IP, ARP and device drivers. Many set ioctls are typically
239 * involved in plumbing operations. A natural model is to serialize these
240 * ioctls one per ill. For example plumbing of hme0 and qfe0 can go on in
241 * parallel without any interference. But various set ioctls on hme0 are best
242 * serialized, along with IPMP operations and processing of DLPI control
243 * messages received from drivers on a per phyint basis. This serialization is
244 * provided by the ipsq_t and primitives operating on this. Details can
245 * be found in ip_if.c above the core primitives operating on ipsq_t.
246 *
247 * Lookups of an ipif or ill by a thread return a refheld ipif / ill.
248 * Simiarly lookup of an ire by a thread also returns a refheld ire.
249 * In addition ipif's and ill's referenced by the ire are also indirectly
250 * refheld. Thus no ipif or ill can vanish as long as an ipif is refheld
251 * directly or indirectly. For example an SIOCSLIFADDR ioctl that changes the
252 * address of an ipif has to go through the ipsq_t. This ensures that only
253 * one such exclusive operation proceeds at any time on the ipif. It then
254 * waits for all refcnts
255 * associated with this ipif to come down to zero. The address is changed
256 * only after the ipif has been quiesced. Then the ipif is brought up again.
257 * More details are described above the comment in ip_sioctl_flags.
258 *
259 * Packet processing is based mostly on IREs and are fully multi-threaded
260 * using standard Solaris MT techniques.
261 *
262 * There are explicit locks in IP to handle:
263 * - The ip_g_head list maintained by mi_open_link() and friends.
264 *
265 * - The reassembly data structures (one lock per hash bucket)
266 *
267 * - conn_lock is meant to protect conn_t fields. The fields actually
268 * protected by conn_lock are documented in the conn_t definition.
269 *
270 * - ire_lock to protect some of the fields of the ire, IRE tables
271 * (one lock per hash bucket). Refer to ip_ire.c for details.
272 *
273 * - ndp_g_lock and ncec_lock for protecting NCEs.
274 *
275 * - ill_lock protects fields of the ill and ipif. Details in ip.h
276 *
277 * - ill_g_lock: This is a global reader/writer lock. Protects the following
278 * * The AVL tree based global multi list of all ills.
279 * * The linked list of all ipifs of an ill
280 * * The <ipsq-xop> mapping
281 * * <ill-phyint> association
282 * Insertion/deletion of an ill in the system, insertion/deletion of an ipif
283 * into an ill, changing the <ipsq-xop> mapping of an ill, changing the
284 * <ill-phyint> assoc of an ill will all have to hold the ill_g_lock as
285 * writer for the actual duration of the insertion/deletion/change.
286 *
287 * - ill_lock: This is a per ill mutex.
288 * It protects some members of the ill_t struct; see ip.h for details.
289 * It also protects the <ill-phyint> assoc.
290 * It also protects the list of ipifs hanging off the ill.
291 *
292 * - ipsq_lock: This is a per ipsq_t mutex lock.
293 * This protects some members of the ipsq_t struct; see ip.h for details.
294 * It also protects the <ipsq-ipxop> mapping
295 *
296 * - ipx_lock: This is a per ipxop_t mutex lock.
297 * This protects some members of the ipxop_t struct; see ip.h for details.
298 *
299 * - phyint_lock: This is a per phyint mutex lock. Protects just the
300 * phyint_flags
301 *
302 * - ip_addr_avail_lock: This is used to ensure the uniqueness of IP addresses.
303 * This lock is held in ipif_up_done and the ipif is marked IPIF_UP and the
304 * uniqueness check also done atomically.
305 *
306 * - ill_g_usesrc_lock: This readers/writer lock protects the usesrc
307 * group list linked by ill_usesrc_grp_next. It also protects the
308 * ill_usesrc_ifindex field. It is taken as a writer when a member of the
309 * group is being added or deleted. This lock is taken as a reader when
310 * walking the list/group(eg: to get the number of members in a usesrc group).
311 * Note, it is only necessary to take this lock if the ill_usesrc_grp_next
312 * field is changing state i.e from NULL to non-NULL or vice-versa. For
313 * example, it is not necessary to take this lock in the initial portion
314 * of ip_sioctl_slifusesrc or at all in ip_sioctl_flags since these
315 * operations are executed exclusively and that ensures that the "usesrc
316 * group state" cannot change. The "usesrc group state" change can happen
317 * only in the latter part of ip_sioctl_slifusesrc and in ill_delete.
318 *
319 * Changing <ill-phyint>, <ipsq-xop> assocications:
320 *
321 * To change the <ill-phyint> association, the ill_g_lock must be held
322 * as writer, and the ill_locks of both the v4 and v6 instance of the ill
323 * must be held.
324 *
325 * To change the <ipsq-xop> association, the ill_g_lock must be held as
326 * writer, the ipsq_lock must be held, and one must be writer on the ipsq.
327 * This is only done when ills are added or removed from IPMP groups.
328 *
329 * To add or delete an ipif from the list of ipifs hanging off the ill,
330 * ill_g_lock (writer) and ill_lock must be held and the thread must be
331 * a writer on the associated ipsq.
332 *
333 * To add or delete an ill to the system, the ill_g_lock must be held as
334 * writer and the thread must be a writer on the associated ipsq.
335 *
336 * To add or delete an ilm to an ill, the ill_lock must be held and the thread
337 * must be a writer on the associated ipsq.
338 *
339 * Lock hierarchy
340 *
341 * Some lock hierarchy scenarios are listed below.
342 *
343 * ill_g_lock -> conn_lock -> ill_lock -> ipsq_lock -> ipx_lock
344 * ill_g_lock -> ill_lock(s) -> phyint_lock
345 * ill_g_lock -> ndp_g_lock -> ill_lock -> ncec_lock
346 * ill_g_lock -> ip_addr_avail_lock
347 * conn_lock -> irb_lock -> ill_lock -> ire_lock
348 * ill_g_lock -> ip_g_nd_lock
349 * ill_g_lock -> ips_ipmp_lock -> ill_lock -> nce_lock
350 * ill_g_lock -> ndp_g_lock -> ill_lock -> ncec_lock -> nce_lock
351 * arl_lock -> ill_lock
352 * ips_ire_dep_lock -> irb_lock
353 *
354 * When more than 1 ill lock is needed to be held, all ill lock addresses
355 * are sorted on address and locked starting from highest addressed lock
356 * downward.
357 *
358 * Multicast scenarios
359 * ips_ill_g_lock -> ill_mcast_lock
360 * conn_ilg_lock -> ips_ill_g_lock -> ill_lock
361 * ill_mcast_serializer -> ill_mcast_lock -> ips_ipmp_lock -> ill_lock
362 * ill_mcast_serializer -> ill_mcast_lock -> connf_lock -> conn_lock
363 * ill_mcast_serializer -> ill_mcast_lock -> conn_ilg_lock
364 * ill_mcast_serializer -> ill_mcast_lock -> ips_igmp_timer_lock
365 *
366 * IPsec scenarios
367 *
368 * ipsa_lock -> ill_g_lock -> ill_lock
369 * ill_g_usesrc_lock -> ill_g_lock -> ill_lock
370 *
371 * Trusted Solaris scenarios
372 *
373 * igsa_lock -> gcgrp_rwlock -> gcgrp_lock
374 * igsa_lock -> gcdb_lock
375 * gcgrp_rwlock -> ire_lock
376 * gcgrp_rwlock -> gcdb_lock
377 *
378 * squeue(sq_lock), flow related (ft_lock, fe_lock) locking
379 *
380 * cpu_lock --> ill_lock --> sqset_lock --> sq_lock
381 * sq_lock -> conn_lock -> QLOCK(q)
382 * ill_lock -> ft_lock -> fe_lock
383 *
384 * Routing/forwarding table locking notes:
385 *
386 * Lock acquisition order: Radix tree lock, irb_lock.
387 * Requirements:
388 * i. Walker must not hold any locks during the walker callback.
389 * ii Walker must not see a truncated tree during the walk because of any node
390 * deletion.
391 * iii Existing code assumes ire_bucket is valid if it is non-null and is used
392 * in many places in the code to walk the irb list. Thus even if all the
393 * ires in a bucket have been deleted, we still can't free the radix node
394 * until the ires have actually been inactive'd (freed).
395 *
396 * Tree traversal - Need to hold the global tree lock in read mode.
397 * Before dropping the global tree lock, need to either increment the ire_refcnt
398 * to ensure that the radix node can't be deleted.
399 *
400 * Tree add - Need to hold the global tree lock in write mode to add a
401 * radix node. To prevent the node from being deleted, increment the
402 * irb_refcnt, after the node is added to the tree. The ire itself is
403 * added later while holding the irb_lock, but not the tree lock.
404 *
405 * Tree delete - Need to hold the global tree lock and irb_lock in write mode.
406 * All associated ires must be inactive (i.e. freed), and irb_refcnt
407 * must be zero.
408 *
409 * Walker - Increment irb_refcnt before calling the walker callback. Hold the
410 * global tree lock (read mode) for traversal.
411 *
412 * IRE dependencies - In some cases we hold ips_ire_dep_lock across ire_refrele
413 * hence we will acquire irb_lock while holding ips_ire_dep_lock.
414 *
415 * IPsec notes :
416 *
417 * IP interacts with the IPsec code (AH/ESP) by storing IPsec attributes
418 * in the ip_xmit_attr_t ip_recv_attr_t. For outbound datagrams, the
419 * ip_xmit_attr_t has the
420 * information used by the IPsec code for applying the right level of
421 * protection. The information initialized by IP in the ip_xmit_attr_t
422 * is determined by the per-socket policy or global policy in the system.
423 * For inbound datagrams, the ip_recv_attr_t
424 * starts out with nothing in it. It gets filled
425 * with the right information if it goes through the AH/ESP code, which
426 * happens if the incoming packet is secure. The information initialized
427 * by AH/ESP, is later used by IP (during fanouts to ULP) to see whether
428 * the policy requirements needed by per-socket policy or global policy
429 * is met or not.
430 *
431 * For fully connected sockets i.e dst, src [addr, port] is known,
432 * conn_policy_cached is set indicating that policy has been cached.
433 * conn_in_enforce_policy may or may not be set depending on whether
434 * there is a global policy match or per-socket policy match.
435 * Policy inheriting happpens in ip_policy_set once the destination is known.
436 * Once the right policy is set on the conn_t, policy cannot change for
437 * this socket. This makes life simpler for TCP (UDP ?) where
438 * re-transmissions go out with the same policy. For symmetry, policy
439 * is cached for fully connected UDP sockets also. Thus if policy is cached,
440 * it also implies that policy is latched i.e policy cannot change
441 * on these sockets. As we have the right policy on the conn, we don't
442 * have to lookup global policy for every outbound and inbound datagram
443 * and thus serving as an optimization. Note that a global policy change
444 * does not affect fully connected sockets if they have policy. If fully
445 * connected sockets did not have any policy associated with it, global
446 * policy change may affect them.
447 *
448 * IP Flow control notes:
449 * ---------------------
450 * Non-TCP streams are flow controlled by IP. The way this is accomplished
451 * differs when ILL_CAPAB_DLD_DIRECT is enabled for that IP instance. When
452 * ILL_DIRECT_CAPABLE(ill) is TRUE, IP can do direct function calls into
453 * GLDv3. Otherwise packets are sent down to lower layers using STREAMS
454 * functions.
455 *
456 * Per Tx ring udp flow control:
457 * This is applicable only when ILL_CAPAB_DLD_DIRECT capability is set in
458 * the ill (i.e. ILL_DIRECT_CAPABLE(ill) is true).
459 *
460 * The underlying link can expose multiple Tx rings to the GLDv3 mac layer.
461 * To achieve best performance, outgoing traffic need to be fanned out among
462 * these Tx ring. mac_tx() is called (via str_mdata_fastpath_put()) to send
463 * traffic out of the NIC and it takes a fanout hint. UDP connections pass
464 * the address of connp as fanout hint to mac_tx(). Under flow controlled
465 * condition, mac_tx() returns a non-NULL cookie (ip_mac_tx_cookie_t). This
466 * cookie points to a specific Tx ring that is blocked. The cookie is used to
467 * hash into an idl_tx_list[] entry in idl_tx_list[] array. Each idl_tx_list_t
468 * point to drain_lists (idl_t's). These drain list will store the blocked UDP
469 * connp's. The drain list is not a single list but a configurable number of
470 * lists.
471 *
472 * The diagram below shows idl_tx_list_t's and their drain_lists. ip_stack_t
473 * has an array of idl_tx_list_t. The size of the array is TX_FANOUT_SIZE
474 * which is equal to 128. This array in turn contains a pointer to idl_t[],
475 * the ip drain list. The idl_t[] array size is MIN(max_ncpus, 8). The drain
476 * list will point to the list of connp's that are flow controlled.
477 *
478 * --------------- ------- ------- -------
479 * |->|drain_list[0]|-->|connp|-->|connp|-->|connp|-->
480 * | --------------- ------- ------- -------
481 * | --------------- ------- ------- -------
482 * |->|drain_list[1]|-->|connp|-->|connp|-->|connp|-->
483 * ---------------- | --------------- ------- ------- -------
484 * |idl_tx_list[0]|->| --------------- ------- ------- -------
485 * ---------------- |->|drain_list[2]|-->|connp|-->|connp|-->|connp|-->
486 * | --------------- ------- ------- -------
487 * . . . . .
488 * | --------------- ------- ------- -------
489 * |->|drain_list[n]|-->|connp|-->|connp|-->|connp|-->
490 * --------------- ------- ------- -------
491 * --------------- ------- ------- -------
492 * |->|drain_list[0]|-->|connp|-->|connp|-->|connp|-->
493 * | --------------- ------- ------- -------
494 * | --------------- ------- ------- -------
495 * ---------------- |->|drain_list[1]|-->|connp|-->|connp|-->|connp|-->
496 * |idl_tx_list[1]|->| --------------- ------- ------- -------
497 * ---------------- | . . . .
498 * | --------------- ------- ------- -------
499 * |->|drain_list[n]|-->|connp|-->|connp|-->|connp|-->
500 * --------------- ------- ------- -------
501 * .....
502 * ----------------
503 * |idl_tx_list[n]|-> ...
504 * ----------------
505 *
506 * When mac_tx() returns a cookie, the cookie is hashed into an index into
507 * ips_idl_tx_list[], and conn_drain_insert() is called with the idl_tx_list
508 * to insert the conn onto. conn_drain_insert() asserts flow control for the
509 * sockets via su_txq_full() (non-STREAMS) or QFULL on conn_wq (STREAMS).
510 * Further, conn_blocked is set to indicate that the conn is blocked.
511 *
512 * GLDv3 calls ill_flow_enable() when flow control is relieved. The cookie
513 * passed in the call to ill_flow_enable() identifies the blocked Tx ring and
514 * is again hashed to locate the appropriate idl_tx_list, which is then
515 * drained via conn_walk_drain(). conn_walk_drain() goes through each conn in
516 * the drain list and calls conn_drain_remove() to clear flow control (via
517 * calling su_txq_full() or clearing QFULL), and remove the conn from the
518 * drain list.
519 *
520 * Note that the drain list is not a single list but a (configurable) array of
521 * lists (8 elements by default). Synchronization between drain insertion and
522 * flow control wakeup is handled by using idl_txl->txl_lock, and only
523 * conn_drain_insert() and conn_drain_remove() manipulate the drain list.
524 *
525 * Flow control via STREAMS is used when ILL_DIRECT_CAPABLE() returns FALSE.
526 * On the send side, if the packet cannot be sent down to the driver by IP
527 * (canput() fails), ip_xmit() drops the packet and returns EWOULDBLOCK to the
528 * caller, who may then invoke ixa_check_drain_insert() to insert the conn on
529 * the 0'th drain list. When ip_wsrv() runs on the ill_wq because flow
530 * control has been relieved, the blocked conns in the 0'th drain list are
531 * drained as in the non-STREAMS case.
532 *
533 * In both the STREAMS and non-STREAMS cases, the sockfs upcall to set QFULL
534 * is done when the conn is inserted into the drain list (conn_drain_insert())
535 * and cleared when the conn is removed from the it (conn_drain_remove()).
536 *
537 * IPQOS notes:
538 *
539 * IPQoS Policies are applied to packets using IPPF (IP Policy framework)
540 * and IPQoS modules. IPPF includes hooks in IP at different control points
541 * (callout positions) which direct packets to IPQoS modules for policy
542 * processing. Policies, if present, are global.
543 *
544 * The callout positions are located in the following paths:
545 * o local_in (packets destined for this host)
546 * o local_out (packets orginating from this host )
547 * o fwd_in (packets forwarded by this m/c - inbound)
548 * o fwd_out (packets forwarded by this m/c - outbound)
549 * Hooks at these callout points can be enabled/disabled using the ndd variable
550 * ip_policy_mask (a bit mask with the 4 LSB indicating the callout positions).
551 * By default all the callout positions are enabled.
552 *
553 * Outbound (local_out)
554 * Hooks are placed in ire_send_wire_v4 and ire_send_wire_v6.
555 *
556 * Inbound (local_in)
557 * Hooks are placed in ip_fanout_v4 and ip_fanout_v6.
558 *
559 * Forwarding (in and out)
560 * Hooks are placed in ire_recv_forward_v4/v6.
561 *
562 * IP Policy Framework processing (IPPF processing)
563 * Policy processing for a packet is initiated by ip_process, which ascertains
564 * that the classifier (ipgpc) is loaded and configured, failing which the
565 * packet resumes normal processing in IP. If the clasifier is present, the
566 * packet is acted upon by one or more IPQoS modules (action instances), per
567 * filters configured in ipgpc and resumes normal IP processing thereafter.
568 * An action instance can drop a packet in course of its processing.
569 *
570 * Zones notes:
571 *
572 * The partitioning rules for networking are as follows:
573 * 1) Packets coming from a zone must have a source address belonging to that
574 * zone.
575 * 2) Packets coming from a zone can only be sent on a physical interface on
576 * which the zone has an IP address.
577 * 3) Between two zones on the same machine, packet delivery is only allowed if
578 * there's a matching route for the destination and zone in the forwarding
579 * table.
580 * 4) The TCP and UDP port spaces are per-zone; that is, two processes in
581 * different zones can bind to the same port with the wildcard address
582 * (INADDR_ANY).
583 *
584 * The granularity of interface partitioning is at the logical interface level.
585 * Therefore, every zone has its own IP addresses, and incoming packets can be
586 * attributed to a zone unambiguously. A logical interface is placed into a zone
587 * using the SIOCSLIFZONE ioctl; this sets the ipif_zoneid field in the ipif_t
588 * structure. Rule (1) is implemented by modifying the source address selection
589 * algorithm so that the list of eligible addresses is filtered based on the
590 * sending process zone.
591 *
592 * The Internet Routing Entries (IREs) are either exclusive to a zone or shared
593 * across all zones, depending on their type. Here is the break-up:
594 *
595 * IRE type Shared/exclusive
596 * -------- ----------------
597 * IRE_BROADCAST Exclusive
598 * IRE_DEFAULT (default routes) Shared (*)
599 * IRE_LOCAL Exclusive (x)
600 * IRE_LOOPBACK Exclusive
601 * IRE_PREFIX (net routes) Shared (*)
602 * IRE_IF_NORESOLVER (interface routes) Exclusive
603 * IRE_IF_RESOLVER (interface routes) Exclusive
604 * IRE_IF_CLONE (interface routes) Exclusive
605 * IRE_HOST (host routes) Shared (*)
606 *
607 * (*) A zone can only use a default or off-subnet route if the gateway is
608 * directly reachable from the zone, that is, if the gateway's address matches
609 * one of the zone's logical interfaces.
610 *
611 * (x) IRE_LOCAL are handled a bit differently.
612 * When ip_restrict_interzone_loopback is set (the default),
613 * ire_route_recursive restricts loopback using an IRE_LOCAL
614 * between zone to the case when L2 would have conceptually looped the packet
615 * back, i.e. the loopback which is required since neither Ethernet drivers
616 * nor Ethernet hardware loops them back. This is the case when the normal
617 * routes (ignoring IREs with different zoneids) would send out the packet on
618 * the same ill as the ill with which is IRE_LOCAL is associated.
619 *
620 * Multiple zones can share a common broadcast address; typically all zones
621 * share the 255.255.255.255 address. Incoming as well as locally originated
622 * broadcast packets must be dispatched to all the zones on the broadcast
623 * network. For directed broadcasts (e.g. 10.16.72.255) this is not trivial
624 * since some zones may not be on the 10.16.72/24 network. To handle this, each
625 * zone has its own set of IRE_BROADCAST entries; then, broadcast packets are
626 * sent to every zone that has an IRE_BROADCAST entry for the destination
627 * address on the input ill, see ip_input_broadcast().
628 *
629 * Applications in different zones can join the same multicast group address.
630 * The same logic applies for multicast as for broadcast. ip_input_multicast
631 * dispatches packets to all zones that have members on the physical interface.
632 */
633
634 /*
635 * Squeue Fanout flags:
636 * 0: No fanout.
637 * 1: Fanout across all squeues
638 */
639 boolean_t ip_squeue_fanout = 0;
640
641 /*
642 * Maximum dups allowed per packet.
643 */
644 uint_t ip_max_frag_dups = 10;
645
646 static int ip_open(queue_t *q, dev_t *devp, int flag, int sflag,
647 cred_t *credp, boolean_t isv6);
648 static mblk_t *ip_xmit_attach_llhdr(mblk_t *, nce_t *);
649
650 static boolean_t icmp_inbound_verify_v4(mblk_t *, icmph_t *, ip_recv_attr_t *);
651 static void icmp_inbound_too_big_v4(icmph_t *, ip_recv_attr_t *);
652 static void icmp_inbound_error_fanout_v4(mblk_t *, icmph_t *,
653 ip_recv_attr_t *);
654 static void icmp_options_update(ipha_t *);
655 static void icmp_param_problem(mblk_t *, uint8_t, ip_recv_attr_t *);
656 static void icmp_pkt(mblk_t *, void *, size_t, ip_recv_attr_t *);
657 static mblk_t *icmp_pkt_err_ok(mblk_t *, ip_recv_attr_t *);
658 static void icmp_redirect_v4(mblk_t *mp, ipha_t *, icmph_t *,
659 ip_recv_attr_t *);
660 static void icmp_send_redirect(mblk_t *, ipaddr_t, ip_recv_attr_t *);
661 static void icmp_send_reply_v4(mblk_t *, ipha_t *, icmph_t *,
662 ip_recv_attr_t *);
663
664 mblk_t *ip_dlpi_alloc(size_t, t_uscalar_t);
665 char *ip_dot_addr(ipaddr_t, char *);
666 mblk_t *ip_carve_mp(mblk_t **, ssize_t);
667 int ip_close(queue_t *, int);
668 static char *ip_dot_saddr(uchar_t *, char *);
669 static void ip_lrput(queue_t *, mblk_t *);
670 ipaddr_t ip_net_mask(ipaddr_t);
671 char *ip_nv_lookup(nv_t *, int);
672 void ip_rput(queue_t *, mblk_t *);
673 static void ip_rput_dlpi_writer(ipsq_t *dummy_sq, queue_t *q, mblk_t *mp,
674 void *dummy_arg);
675 int ip_snmp_get(queue_t *, mblk_t *, int, boolean_t);
676 static mblk_t *ip_snmp_get_mib2_ip(queue_t *, mblk_t *,
677 mib2_ipIfStatsEntry_t *, ip_stack_t *, boolean_t);
678 static mblk_t *ip_snmp_get_mib2_ip_traffic_stats(queue_t *, mblk_t *,
679 ip_stack_t *, boolean_t);
680 static mblk_t *ip_snmp_get_mib2_ip6(queue_t *, mblk_t *, ip_stack_t *,
681 boolean_t);
682 static mblk_t *ip_snmp_get_mib2_icmp(queue_t *, mblk_t *, ip_stack_t *ipst);
683 static mblk_t *ip_snmp_get_mib2_icmp6(queue_t *, mblk_t *, ip_stack_t *ipst);
684 static mblk_t *ip_snmp_get_mib2_igmp(queue_t *, mblk_t *, ip_stack_t *ipst);
685 static mblk_t *ip_snmp_get_mib2_multi(queue_t *, mblk_t *, ip_stack_t *ipst);
686 static mblk_t *ip_snmp_get_mib2_ip_addr(queue_t *, mblk_t *,
687 ip_stack_t *ipst, boolean_t);
688 static mblk_t *ip_snmp_get_mib2_ip6_addr(queue_t *, mblk_t *,
689 ip_stack_t *ipst, boolean_t);
690 static mblk_t *ip_snmp_get_mib2_ip_group_src(queue_t *, mblk_t *,
691 ip_stack_t *ipst);
692 static mblk_t *ip_snmp_get_mib2_ip6_group_src(queue_t *, mblk_t *,
693 ip_stack_t *ipst);
694 static mblk_t *ip_snmp_get_mib2_ip_group_mem(queue_t *, mblk_t *,
695 ip_stack_t *ipst);
696 static mblk_t *ip_snmp_get_mib2_ip6_group_mem(queue_t *, mblk_t *,
697 ip_stack_t *ipst);
698 static mblk_t *ip_snmp_get_mib2_virt_multi(queue_t *, mblk_t *,
699 ip_stack_t *ipst);
700 static mblk_t *ip_snmp_get_mib2_multi_rtable(queue_t *, mblk_t *,
701 ip_stack_t *ipst);
702 static mblk_t *ip_snmp_get_mib2_ip_route_media(queue_t *, mblk_t *, int,
703 ip_stack_t *ipst);
704 static mblk_t *ip_snmp_get_mib2_ip6_route_media(queue_t *, mblk_t *, int,
705 ip_stack_t *ipst);
706 static void ip_snmp_get2_v4(ire_t *, iproutedata_t *);
707 static void ip_snmp_get2_v6_route(ire_t *, iproutedata_t *);
708 static int ip_snmp_get2_v4_media(ncec_t *, iproutedata_t *);
709 static int ip_snmp_get2_v6_media(ncec_t *, iproutedata_t *);
710 int ip_snmp_set(queue_t *, int, int, uchar_t *, int);
711
712 static mblk_t *ip_fragment_copyhdr(uchar_t *, int, int, ip_stack_t *,
713 mblk_t *);
714
715 static void conn_drain_init(ip_stack_t *);
716 static void conn_drain_fini(ip_stack_t *);
717 static void conn_drain(conn_t *connp, boolean_t closing);
718
719 static void conn_walk_drain(ip_stack_t *, idl_tx_list_t *);
720 static void conn_walk_sctp(pfv_t, void *, zoneid_t, netstack_t *);
721
722 static void *ip_stack_init(netstackid_t stackid, netstack_t *ns);
723 static void ip_stack_shutdown(netstackid_t stackid, void *arg);
724 static void ip_stack_fini(netstackid_t stackid, void *arg);
725
726 static int ip_multirt_apply_membership(int (*fn)(conn_t *, boolean_t,
727 const in6_addr_t *, ipaddr_t, uint_t, mcast_record_t, const in6_addr_t *),
728 ire_t *, conn_t *, boolean_t, const in6_addr_t *, mcast_record_t,
729 const in6_addr_t *);
730
731 static int ip_squeue_switch(int);
732
733 static void *ip_kstat_init(netstackid_t, ip_stack_t *);
734 static void ip_kstat_fini(netstackid_t, kstat_t *);
735 static int ip_kstat_update(kstat_t *kp, int rw);
736 static void *icmp_kstat_init(netstackid_t);
737 static void icmp_kstat_fini(netstackid_t, kstat_t *);
738 static int icmp_kstat_update(kstat_t *kp, int rw);
739 static void *ip_kstat2_init(netstackid_t, ip_stat_t *);
740 static void ip_kstat2_fini(netstackid_t, kstat_t *);
741
742 static void ipobs_init(ip_stack_t *);
743 static void ipobs_fini(ip_stack_t *);
744
745 static int ip_tp_cpu_update(cpu_setup_t, int, void *);
746
747 ipaddr_t ip_g_all_ones = IP_HOST_MASK;
748
749 static long ip_rput_pullups;
750 int dohwcksum = 1; /* use h/w cksum if supported by the hardware */
751
752 vmem_t *ip_minor_arena_sa; /* for minor nos. from INET_MIN_DEV+2 thru 2^^18-1 */
753 vmem_t *ip_minor_arena_la; /* for minor nos. from 2^^18 thru 2^^32-1 */
754
755 int ip_debug;
756
757 /*
758 * Multirouting/CGTP stuff
759 */
760 int ip_cgtp_filter_rev = CGTP_FILTER_REV; /* CGTP hooks version */
761
762 /*
763 * IP tunables related declarations. Definitions are in ip_tunables.c
764 */
765 extern mod_prop_info_t ip_propinfo_tbl[];
766 extern int ip_propinfo_count;
767
768 /*
769 * Table of IP ioctls encoding the various properties of the ioctl and
770 * indexed based on the last byte of the ioctl command. Occasionally there
771 * is a clash, and there is more than 1 ioctl with the same last byte.
772 * In such a case 1 ioctl is encoded in the ndx table and the remaining
773 * ioctls are encoded in the misc table. An entry in the ndx table is
774 * retrieved by indexing on the last byte of the ioctl command and comparing
775 * the ioctl command with the value in the ndx table. In the event of a
776 * mismatch the misc table is then searched sequentially for the desired
777 * ioctl command.
778 *
779 * Entry: <command> <copyin_size> <flags> <cmd_type> <function> <restart_func>
780 */
781 ip_ioctl_cmd_t ip_ndx_ioctl_table[] = {
782 /* 000 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
783 /* 001 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
784 /* 002 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
785 /* 003 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
786 /* 004 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
787 /* 005 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
788 /* 006 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
789 /* 007 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
790 /* 008 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
791 /* 009 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
792
793 /* 010 */ { SIOCADDRT, sizeof (struct rtentry), IPI_PRIV,
794 MISC_CMD, ip_siocaddrt, NULL },
795 /* 011 */ { SIOCDELRT, sizeof (struct rtentry), IPI_PRIV,
796 MISC_CMD, ip_siocdelrt, NULL },
797
798 /* 012 */ { SIOCSIFADDR, sizeof (struct ifreq), IPI_PRIV | IPI_WR,
799 IF_CMD, ip_sioctl_addr, ip_sioctl_addr_restart },
800 /* 013 */ { SIOCGIFADDR, sizeof (struct ifreq), IPI_GET_CMD,
801 IF_CMD, ip_sioctl_get_addr, NULL },
802
803 /* 014 */ { SIOCSIFDSTADDR, sizeof (struct ifreq), IPI_PRIV | IPI_WR,
804 IF_CMD, ip_sioctl_dstaddr, ip_sioctl_dstaddr_restart },
805 /* 015 */ { SIOCGIFDSTADDR, sizeof (struct ifreq),
806 IPI_GET_CMD, IF_CMD, ip_sioctl_get_dstaddr, NULL },
807
808 /* 016 */ { SIOCSIFFLAGS, sizeof (struct ifreq),
809 IPI_PRIV | IPI_WR,
810 IF_CMD, ip_sioctl_flags, ip_sioctl_flags_restart },
811 /* 017 */ { SIOCGIFFLAGS, sizeof (struct ifreq),
812 IPI_MODOK | IPI_GET_CMD,
813 IF_CMD, ip_sioctl_get_flags, NULL },
814
815 /* 018 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
816 /* 019 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
817
818 /* copyin size cannot be coded for SIOCGIFCONF */
819 /* 020 */ { O_SIOCGIFCONF, 0, IPI_GET_CMD,
820 MISC_CMD, ip_sioctl_get_ifconf, NULL },
821
822 /* 021 */ { SIOCSIFMTU, sizeof (struct ifreq), IPI_PRIV | IPI_WR,
823 IF_CMD, ip_sioctl_mtu, NULL },
824 /* 022 */ { SIOCGIFMTU, sizeof (struct ifreq), IPI_GET_CMD,
825 IF_CMD, ip_sioctl_get_mtu, NULL },
826 /* 023 */ { SIOCGIFBRDADDR, sizeof (struct ifreq),
827 IPI_GET_CMD, IF_CMD, ip_sioctl_get_brdaddr, NULL },
828 /* 024 */ { SIOCSIFBRDADDR, sizeof (struct ifreq), IPI_PRIV | IPI_WR,
829 IF_CMD, ip_sioctl_brdaddr, NULL },
830 /* 025 */ { SIOCGIFNETMASK, sizeof (struct ifreq),
831 IPI_GET_CMD, IF_CMD, ip_sioctl_get_netmask, NULL },
832 /* 026 */ { SIOCSIFNETMASK, sizeof (struct ifreq), IPI_PRIV | IPI_WR,
833 IF_CMD, ip_sioctl_netmask, ip_sioctl_netmask_restart },
834 /* 027 */ { SIOCGIFMETRIC, sizeof (struct ifreq),
835 IPI_GET_CMD, IF_CMD, ip_sioctl_get_metric, NULL },
836 /* 028 */ { SIOCSIFMETRIC, sizeof (struct ifreq), IPI_PRIV,
837 IF_CMD, ip_sioctl_metric, NULL },
838 /* 029 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
839
840 /* See 166-168 below for extended SIOC*XARP ioctls */
841 /* 030 */ { SIOCSARP, sizeof (struct arpreq), IPI_PRIV | IPI_WR,
842 ARP_CMD, ip_sioctl_arp, NULL },
843 /* 031 */ { SIOCGARP, sizeof (struct arpreq), IPI_GET_CMD,
844 ARP_CMD, ip_sioctl_arp, NULL },
845 /* 032 */ { SIOCDARP, sizeof (struct arpreq), IPI_PRIV | IPI_WR,
846 ARP_CMD, ip_sioctl_arp, NULL },
847
848 /* 033 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
849 /* 034 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
850 /* 035 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
851 /* 036 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
852 /* 037 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
853 /* 038 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
854 /* 039 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
855 /* 040 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
856 /* 041 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
857 /* 042 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
858 /* 043 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
859 /* 044 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
860 /* 045 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
861 /* 046 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
862 /* 047 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
863 /* 048 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
864 /* 049 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
865 /* 050 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
866 /* 051 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
867 /* 052 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
868 /* 053 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
869
870 /* 054 */ { IF_UNITSEL, sizeof (int), IPI_PRIV | IPI_WR | IPI_MODOK,
871 MISC_CMD, if_unitsel, if_unitsel_restart },
872
873 /* 055 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
874 /* 056 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
875 /* 057 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
876 /* 058 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
877 /* 059 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
878 /* 060 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
879 /* 061 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
880 /* 062 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
881 /* 063 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
882 /* 064 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
883 /* 065 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
884 /* 066 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
885 /* 067 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
886 /* 068 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
887 /* 069 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
888 /* 070 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
889 /* 071 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
890 /* 072 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
891
892 /* 073 */ { SIOCSIFNAME, sizeof (struct ifreq),
893 IPI_PRIV | IPI_WR | IPI_MODOK,
894 IF_CMD, ip_sioctl_sifname, NULL },
895
896 /* 074 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
897 /* 075 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
898 /* 076 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
899 /* 077 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
900 /* 078 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
901 /* 079 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
902 /* 080 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
903 /* 081 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
904 /* 082 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
905 /* 083 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
906 /* 084 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
907 /* 085 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
908 /* 086 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
909
910 /* 087 */ { SIOCGIFNUM, sizeof (int), IPI_GET_CMD,
911 MISC_CMD, ip_sioctl_get_ifnum, NULL },
912 /* 088 */ { SIOCGIFMUXID, sizeof (struct ifreq), IPI_GET_CMD,
913 IF_CMD, ip_sioctl_get_muxid, NULL },
914 /* 089 */ { SIOCSIFMUXID, sizeof (struct ifreq),
915 IPI_PRIV | IPI_WR, IF_CMD, ip_sioctl_muxid, NULL },
916
917 /* Both if and lif variants share same func */
918 /* 090 */ { SIOCGIFINDEX, sizeof (struct ifreq), IPI_GET_CMD,
919 IF_CMD, ip_sioctl_get_lifindex, NULL },
920 /* Both if and lif variants share same func */
921 /* 091 */ { SIOCSIFINDEX, sizeof (struct ifreq),
922 IPI_PRIV | IPI_WR, IF_CMD, ip_sioctl_slifindex, NULL },
923
924 /* copyin size cannot be coded for SIOCGIFCONF */
925 /* 092 */ { SIOCGIFCONF, 0, IPI_GET_CMD,
926 MISC_CMD, ip_sioctl_get_ifconf, NULL },
927 /* 093 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
928 /* 094 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
929 /* 095 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
930 /* 096 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
931 /* 097 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
932 /* 098 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
933 /* 099 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
934 /* 100 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
935 /* 101 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
936 /* 102 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
937 /* 103 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
938 /* 104 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
939 /* 105 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
940 /* 106 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
941 /* 107 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
942 /* 108 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
943 /* 109 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
944
945 /* 110 */ { SIOCLIFREMOVEIF, sizeof (struct lifreq),
946 IPI_PRIV | IPI_WR, LIF_CMD, ip_sioctl_removeif,
947 ip_sioctl_removeif_restart },
948 /* 111 */ { SIOCLIFADDIF, sizeof (struct lifreq),
949 IPI_GET_CMD | IPI_PRIV | IPI_WR,
950 LIF_CMD, ip_sioctl_addif, NULL },
951 #define SIOCLIFADDR_NDX 112
952 /* 112 */ { SIOCSLIFADDR, sizeof (struct lifreq), IPI_PRIV | IPI_WR,
953 LIF_CMD, ip_sioctl_addr, ip_sioctl_addr_restart },
954 /* 113 */ { SIOCGLIFADDR, sizeof (struct lifreq),
955 IPI_GET_CMD, LIF_CMD, ip_sioctl_get_addr, NULL },
956 /* 114 */ { SIOCSLIFDSTADDR, sizeof (struct lifreq), IPI_PRIV | IPI_WR,
957 LIF_CMD, ip_sioctl_dstaddr, ip_sioctl_dstaddr_restart },
958 /* 115 */ { SIOCGLIFDSTADDR, sizeof (struct lifreq),
959 IPI_GET_CMD, LIF_CMD, ip_sioctl_get_dstaddr, NULL },
960 /* 116 */ { SIOCSLIFFLAGS, sizeof (struct lifreq),
961 IPI_PRIV | IPI_WR,
962 LIF_CMD, ip_sioctl_flags, ip_sioctl_flags_restart },
963 /* 117 */ { SIOCGLIFFLAGS, sizeof (struct lifreq),
964 IPI_GET_CMD | IPI_MODOK,
965 LIF_CMD, ip_sioctl_get_flags, NULL },
966
967 /* 118 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
968 /* 119 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
969
970 /* 120 */ { O_SIOCGLIFCONF, 0, IPI_GET_CMD, MISC_CMD,
971 ip_sioctl_get_lifconf, NULL },
972 /* 121 */ { SIOCSLIFMTU, sizeof (struct lifreq), IPI_PRIV | IPI_WR,
973 LIF_CMD, ip_sioctl_mtu, NULL },
974 /* 122 */ { SIOCGLIFMTU, sizeof (struct lifreq), IPI_GET_CMD,
975 LIF_CMD, ip_sioctl_get_mtu, NULL },
976 /* 123 */ { SIOCGLIFBRDADDR, sizeof (struct lifreq),
977 IPI_GET_CMD, LIF_CMD, ip_sioctl_get_brdaddr, NULL },
978 /* 124 */ { SIOCSLIFBRDADDR, sizeof (struct lifreq), IPI_PRIV | IPI_WR,
979 LIF_CMD, ip_sioctl_brdaddr, NULL },
980 /* 125 */ { SIOCGLIFNETMASK, sizeof (struct lifreq),
981 IPI_GET_CMD, LIF_CMD, ip_sioctl_get_netmask, NULL },
982 /* 126 */ { SIOCSLIFNETMASK, sizeof (struct lifreq), IPI_PRIV | IPI_WR,
983 LIF_CMD, ip_sioctl_netmask, ip_sioctl_netmask_restart },
984 /* 127 */ { SIOCGLIFMETRIC, sizeof (struct lifreq),
985 IPI_GET_CMD, LIF_CMD, ip_sioctl_get_metric, NULL },
986 /* 128 */ { SIOCSLIFMETRIC, sizeof (struct lifreq), IPI_PRIV | IPI_WR,
987 LIF_CMD, ip_sioctl_metric, NULL },
988 /* 129 */ { SIOCSLIFNAME, sizeof (struct lifreq),
989 IPI_PRIV | IPI_WR | IPI_MODOK,
990 LIF_CMD, ip_sioctl_slifname,
991 ip_sioctl_slifname_restart },
992
993 /* 130 */ { SIOCGLIFNUM, sizeof (struct lifnum), IPI_GET_CMD,
994 MISC_CMD, ip_sioctl_get_lifnum, NULL },
995 /* 131 */ { SIOCGLIFMUXID, sizeof (struct lifreq),
996 IPI_GET_CMD, LIF_CMD, ip_sioctl_get_muxid, NULL },
997 /* 132 */ { SIOCSLIFMUXID, sizeof (struct lifreq),
998 IPI_PRIV | IPI_WR, LIF_CMD, ip_sioctl_muxid, NULL },
999 /* 133 */ { SIOCGLIFINDEX, sizeof (struct lifreq),
1000 IPI_GET_CMD, LIF_CMD, ip_sioctl_get_lifindex, 0 },
1001 /* 134 */ { SIOCSLIFINDEX, sizeof (struct lifreq),
1002 IPI_PRIV | IPI_WR, LIF_CMD, ip_sioctl_slifindex, 0 },
1003 /* 135 */ { SIOCSLIFTOKEN, sizeof (struct lifreq), IPI_PRIV | IPI_WR,
1004 LIF_CMD, ip_sioctl_token, NULL },
1005 /* 136 */ { SIOCGLIFTOKEN, sizeof (struct lifreq),
1006 IPI_GET_CMD, LIF_CMD, ip_sioctl_get_token, NULL },
1007 /* 137 */ { SIOCSLIFSUBNET, sizeof (struct lifreq), IPI_PRIV | IPI_WR,
1008 LIF_CMD, ip_sioctl_subnet, ip_sioctl_subnet_restart },
1009 /* 138 */ { SIOCGLIFSUBNET, sizeof (struct lifreq),
1010 IPI_GET_CMD, LIF_CMD, ip_sioctl_get_subnet, NULL },
1011 /* 139 */ { SIOCSLIFLNKINFO, sizeof (struct lifreq), IPI_PRIV | IPI_WR,
1012 LIF_CMD, ip_sioctl_lnkinfo, NULL },
1013
1014 /* 140 */ { SIOCGLIFLNKINFO, sizeof (struct lifreq),
1015 IPI_GET_CMD, LIF_CMD, ip_sioctl_get_lnkinfo, NULL },
1016 /* 141 */ { SIOCLIFDELND, sizeof (struct lifreq), IPI_PRIV,
1017 LIF_CMD, ip_siocdelndp_v6, NULL },
1018 /* 142 */ { SIOCLIFGETND, sizeof (struct lifreq), IPI_GET_CMD,
1019 LIF_CMD, ip_siocqueryndp_v6, NULL },
1020 /* 143 */ { SIOCLIFSETND, sizeof (struct lifreq), IPI_PRIV,
1021 LIF_CMD, ip_siocsetndp_v6, NULL },
1022 /* 144 */ { SIOCTMYADDR, sizeof (struct sioc_addrreq), IPI_GET_CMD,
1023 MISC_CMD, ip_sioctl_tmyaddr, NULL },
1024 /* 145 */ { SIOCTONLINK, sizeof (struct sioc_addrreq), IPI_GET_CMD,
1025 MISC_CMD, ip_sioctl_tonlink, NULL },
1026 /* 146 */ { SIOCTMYSITE, sizeof (struct sioc_addrreq), 0,
1027 MISC_CMD, ip_sioctl_tmysite, NULL },
1028 /* 147 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
1029 /* 148 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
1030 /* IPSECioctls handled in ip_sioctl_copyin_setup itself */
1031 /* 149 */ { SIOCFIPSECONFIG, 0, IPI_PRIV, MISC_CMD, NULL, NULL },
1032 /* 150 */ { SIOCSIPSECONFIG, 0, IPI_PRIV, MISC_CMD, NULL, NULL },
1033 /* 151 */ { SIOCDIPSECONFIG, 0, IPI_PRIV, MISC_CMD, NULL, NULL },
1034 /* 152 */ { SIOCLIPSECONFIG, 0, IPI_PRIV, MISC_CMD, NULL, NULL },
1035
1036 /* 153 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
1037
1038 /* 154 */ { SIOCGLIFBINDING, sizeof (struct lifreq), IPI_GET_CMD,
1039 LIF_CMD, ip_sioctl_get_binding, NULL },
1040 /* 155 */ { SIOCSLIFGROUPNAME, sizeof (struct lifreq),
1041 IPI_PRIV | IPI_WR,
1042 LIF_CMD, ip_sioctl_groupname, ip_sioctl_groupname },
1043 /* 156 */ { SIOCGLIFGROUPNAME, sizeof (struct lifreq),
1044 IPI_GET_CMD, LIF_CMD, ip_sioctl_get_groupname, NULL },
1045 /* 157 */ { SIOCGLIFGROUPINFO, sizeof (lifgroupinfo_t),
1046 IPI_GET_CMD, MISC_CMD, ip_sioctl_groupinfo, NULL },
1047
1048 /* Leave 158-160 unused; used to be SIOC*IFARP ioctls */
1049 /* 158 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
1050 /* 159 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
1051 /* 160 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
1052
1053 /* 161 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
1054
1055 /* These are handled in ip_sioctl_copyin_setup itself */
1056 /* 162 */ { SIOCGIP6ADDRPOLICY, 0, IPI_NULL_BCONT,
1057 MISC_CMD, NULL, NULL },
1058 /* 163 */ { SIOCSIP6ADDRPOLICY, 0, IPI_PRIV | IPI_NULL_BCONT,
1059 MISC_CMD, NULL, NULL },
1060 /* 164 */ { SIOCGDSTINFO, 0, IPI_GET_CMD, MISC_CMD, NULL, NULL },
1061
1062 /* 165 */ { SIOCGLIFCONF, 0, IPI_GET_CMD, MISC_CMD,
1063 ip_sioctl_get_lifconf, NULL },
1064
1065 /* 166 */ { SIOCSXARP, sizeof (struct xarpreq), IPI_PRIV | IPI_WR,
1066 XARP_CMD, ip_sioctl_arp, NULL },
1067 /* 167 */ { SIOCGXARP, sizeof (struct xarpreq), IPI_GET_CMD,
1068 XARP_CMD, ip_sioctl_arp, NULL },
1069 /* 168 */ { SIOCDXARP, sizeof (struct xarpreq), IPI_PRIV | IPI_WR,
1070 XARP_CMD, ip_sioctl_arp, NULL },
1071
1072 /* SIOCPOPSOCKFS is not handled by IP */
1073 /* 169 */ { IPI_DONTCARE /* SIOCPOPSOCKFS */, 0, 0, 0, NULL, NULL },
1074
1075 /* 170 */ { SIOCGLIFZONE, sizeof (struct lifreq),
1076 IPI_GET_CMD, LIF_CMD, ip_sioctl_get_lifzone, NULL },
1077 /* 171 */ { SIOCSLIFZONE, sizeof (struct lifreq),
1078 IPI_PRIV | IPI_WR, LIF_CMD, ip_sioctl_slifzone,
1079 ip_sioctl_slifzone_restart },
1080 /* 172-174 are SCTP ioctls and not handled by IP */
1081 /* 172 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
1082 /* 173 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
1083 /* 174 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
1084 /* 175 */ { SIOCGLIFUSESRC, sizeof (struct lifreq),
1085 IPI_GET_CMD, LIF_CMD,
1086 ip_sioctl_get_lifusesrc, 0 },
1087 /* 176 */ { SIOCSLIFUSESRC, sizeof (struct lifreq),
1088 IPI_PRIV | IPI_WR,
1089 LIF_CMD, ip_sioctl_slifusesrc,
1090 NULL },
1091 /* 177 */ { SIOCGLIFSRCOF, 0, IPI_GET_CMD, MISC_CMD,
1092 ip_sioctl_get_lifsrcof, NULL },
1093 /* 178 */ { SIOCGMSFILTER, sizeof (struct group_filter), IPI_GET_CMD,
1094 MSFILT_CMD, ip_sioctl_msfilter, NULL },
1095 /* 179 */ { SIOCSMSFILTER, sizeof (struct group_filter), 0,
1096 MSFILT_CMD, ip_sioctl_msfilter, NULL },
1097 /* 180 */ { SIOCGIPMSFILTER, sizeof (struct ip_msfilter), IPI_GET_CMD,
1098 MSFILT_CMD, ip_sioctl_msfilter, NULL },
1099 /* 181 */ { SIOCSIPMSFILTER, sizeof (struct ip_msfilter), 0,
1100 MSFILT_CMD, ip_sioctl_msfilter, NULL },
1101 /* 182 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL },
1102 /* SIOCSENABLESDP is handled by SDP */
1103 /* 183 */ { IPI_DONTCARE /* SIOCSENABLESDP */, 0, 0, 0, NULL, NULL },
1104 /* 184 */ { IPI_DONTCARE /* SIOCSQPTR */, 0, 0, 0, NULL, NULL },
1105 /* 185 */ { SIOCGIFHWADDR, sizeof (struct ifreq), IPI_GET_CMD,
1106 IF_CMD, ip_sioctl_get_ifhwaddr, NULL },
1107 /* 186 */ { IPI_DONTCARE /* SIOCGSTAMP */, 0, 0, 0, NULL, NULL },
1108 /* 187 */ { SIOCILB, 0, IPI_PRIV | IPI_GET_CMD, MISC_CMD,
1109 ip_sioctl_ilb_cmd, NULL },
1110 /* 188 */ { SIOCGETPROP, 0, IPI_GET_CMD, 0, NULL, NULL },
1111 /* 189 */ { SIOCSETPROP, 0, IPI_PRIV | IPI_WR, 0, NULL, NULL},
1112 /* 190 */ { SIOCGLIFDADSTATE, sizeof (struct lifreq),
1113 IPI_GET_CMD, LIF_CMD, ip_sioctl_get_dadstate, NULL },
1114 /* 191 */ { SIOCSLIFPREFIX, sizeof (struct lifreq), IPI_PRIV | IPI_WR,
1115 LIF_CMD, ip_sioctl_prefix, ip_sioctl_prefix_restart },
1116 /* 192 */ { SIOCGLIFHWADDR, sizeof (struct lifreq), IPI_GET_CMD,
1117 LIF_CMD, ip_sioctl_get_lifhwaddr, NULL }
1118 };
1119
1120 int ip_ndx_ioctl_count = sizeof (ip_ndx_ioctl_table) / sizeof (ip_ioctl_cmd_t);
1121
1122 ip_ioctl_cmd_t ip_misc_ioctl_table[] = {
1123 { I_LINK, 0, IPI_PRIV | IPI_WR, 0, NULL, NULL },
1124 { I_UNLINK, 0, IPI_PRIV | IPI_WR, 0, NULL, NULL },
1125 { I_PLINK, 0, IPI_PRIV | IPI_WR, 0, NULL, NULL },
1126 { I_PUNLINK, 0, IPI_PRIV | IPI_WR, 0, NULL, NULL },
1127 { ND_GET, 0, 0, 0, NULL, NULL },
1128 { ND_SET, 0, IPI_PRIV | IPI_WR, 0, NULL, NULL },
1129 { IP_IOCTL, 0, 0, 0, NULL, NULL },
1130 { SIOCGETVIFCNT, sizeof (struct sioc_vif_req), IPI_GET_CMD,
1131 MISC_CMD, mrt_ioctl},
1132 { SIOCGETSGCNT, sizeof (struct sioc_sg_req), IPI_GET_CMD,
1133 MISC_CMD, mrt_ioctl},
1134 { SIOCGETLSGCNT, sizeof (struct sioc_lsg_req), IPI_GET_CMD,
1135 MISC_CMD, mrt_ioctl}
1136 };
1137
1138 int ip_misc_ioctl_count =
1139 sizeof (ip_misc_ioctl_table) / sizeof (ip_ioctl_cmd_t);
1140
1141 int conn_drain_nthreads; /* Number of drainers reqd. */
1142 /* Settable in /etc/system */
1143 /* Defined in ip_ire.c */
1144 extern uint32_t ip_ire_max_bucket_cnt, ip6_ire_max_bucket_cnt;
1145 extern uint32_t ip_ire_min_bucket_cnt, ip6_ire_min_bucket_cnt;
1146 extern uint32_t ip_ire_mem_ratio, ip_ire_cpu_ratio;
1147
1148 static nv_t ire_nv_arr[] = {
1149 { IRE_BROADCAST, "BROADCAST" },
1150 { IRE_LOCAL, "LOCAL" },
1151 { IRE_LOOPBACK, "LOOPBACK" },
1152 { IRE_DEFAULT, "DEFAULT" },
1153 { IRE_PREFIX, "PREFIX" },
1154 { IRE_IF_NORESOLVER, "IF_NORESOL" },
1155 { IRE_IF_RESOLVER, "IF_RESOLV" },
1156 { IRE_IF_CLONE, "IF_CLONE" },
1157 { IRE_HOST, "HOST" },
1158 { IRE_MULTICAST, "MULTICAST" },
1159 { IRE_NOROUTE, "NOROUTE" },
1160 { 0 }
1161 };
1162
1163 nv_t *ire_nv_tbl = ire_nv_arr;
1164
1165 /* Simple ICMP IP Header Template */
1166 static ipha_t icmp_ipha = {
1167 IP_SIMPLE_HDR_VERSION, 0, 0, 0, 0, 0, IPPROTO_ICMP
1168 };
1169
1170 struct module_info ip_mod_info = {
1171 IP_MOD_ID, IP_MOD_NAME, IP_MOD_MINPSZ, IP_MOD_MAXPSZ, IP_MOD_HIWAT,
1172 IP_MOD_LOWAT
1173 };
1174
1175 /*
1176 * Duplicate static symbols within a module confuses mdb; so we avoid the
1177 * problem by making the symbols here distinct from those in udp.c.
1178 */
1179
1180 /*
1181 * Entry points for IP as a device and as a module.
1182 * We have separate open functions for the /dev/ip and /dev/ip6 devices.
1183 */
1184 static struct qinit iprinitv4 = {
1185 (pfi_t)ip_rput, NULL, ip_openv4, ip_close, NULL,
1186 &ip_mod_info
1187 };
1188
1189 struct qinit iprinitv6 = {
1190 (pfi_t)ip_rput_v6, NULL, ip_openv6, ip_close, NULL,
1191 &ip_mod_info
1192 };
1193
1194 static struct qinit ipwinit = {
1195 (pfi_t)ip_wput_nondata, (pfi_t)ip_wsrv, NULL, NULL, NULL,
1196 &ip_mod_info
1197 };
1198
1199 static struct qinit iplrinit = {
1200 (pfi_t)ip_lrput, NULL, ip_openv4, ip_close, NULL,
1201 &ip_mod_info
1202 };
1203
1204 static struct qinit iplwinit = {
1205 (pfi_t)ip_lwput, NULL, NULL, NULL, NULL,
1206 &ip_mod_info
1207 };
1208
1209 /* For AF_INET aka /dev/ip */
1210 struct streamtab ipinfov4 = {
1211 &iprinitv4, &ipwinit, &iplrinit, &iplwinit
1212 };
1213
1214 /* For AF_INET6 aka /dev/ip6 */
1215 struct streamtab ipinfov6 = {
1216 &iprinitv6, &ipwinit, &iplrinit, &iplwinit
1217 };
1218
1219 #ifdef DEBUG
1220 boolean_t skip_sctp_cksum = B_FALSE;
1221 #endif
1222
1223 /*
1224 * Generate an ICMP fragmentation needed message.
1225 * When called from ip_output side a minimal ip_recv_attr_t needs to be
1226 * constructed by the caller.
1227 */
1228 void
1229 icmp_frag_needed(mblk_t *mp, int mtu, ip_recv_attr_t *ira)
1230 {
1231 icmph_t icmph;
1232 ip_stack_t *ipst = ira->ira_ill->ill_ipst;
1233
1234 mp = icmp_pkt_err_ok(mp, ira);
1235 if (mp == NULL)
1236 return;
1237
1238 bzero(&icmph, sizeof (icmph_t));
1239 icmph.icmph_type = ICMP_DEST_UNREACHABLE;
1240 icmph.icmph_code = ICMP_FRAGMENTATION_NEEDED;
1241 icmph.icmph_du_mtu = htons((uint16_t)mtu);
1242 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutFragNeeded);
1243 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutDestUnreachs);
1244
1245 icmp_pkt(mp, &icmph, sizeof (icmph_t), ira);
1246 }
1247
1248 /*
1249 * icmp_inbound_v4 deals with ICMP messages that are handled by IP.
1250 * If the ICMP message is consumed by IP, i.e., it should not be delivered
1251 * to any IPPROTO_ICMP raw sockets, then it returns NULL.
1252 * Likewise, if the ICMP error is misformed (too short, etc), then it
1253 * returns NULL. The caller uses this to determine whether or not to send
1254 * to raw sockets.
1255 *
1256 * All error messages are passed to the matching transport stream.
1257 *
1258 * The following cases are handled by icmp_inbound:
1259 * 1) It needs to send a reply back and possibly delivering it
1260 * to the "interested" upper clients.
1261 * 2) Return the mblk so that the caller can pass it to the RAW socket clients.
1262 * 3) It needs to change some values in IP only.
1263 * 4) It needs to change some values in IP and upper layers e.g TCP
1264 * by delivering an error to the upper layers.
1265 *
1266 * We handle the above three cases in the context of IPsec in the
1267 * following way :
1268 *
1269 * 1) Send the reply back in the same way as the request came in.
1270 * If it came in encrypted, it goes out encrypted. If it came in
1271 * clear, it goes out in clear. Thus, this will prevent chosen
1272 * plain text attack.
1273 * 2) The client may or may not expect things to come in secure.
1274 * If it comes in secure, the policy constraints are checked
1275 * before delivering it to the upper layers. If it comes in
1276 * clear, ipsec_inbound_accept_clear will decide whether to
1277 * accept this in clear or not. In both the cases, if the returned
1278 * message (IP header + 8 bytes) that caused the icmp message has
1279 * AH/ESP headers, it is sent up to AH/ESP for validation before
1280 * sending up. If there are only 8 bytes of returned message, then
1281 * upper client will not be notified.
1282 * 3) Check with global policy to see whether it matches the constaints.
1283 * But this will be done only if icmp_accept_messages_in_clear is
1284 * zero.
1285 * 4) If we need to change both in IP and ULP, then the decision taken
1286 * while affecting the values in IP and while delivering up to TCP
1287 * should be the same.
1288 *
1289 * There are two cases.
1290 *
1291 * a) If we reject data at the IP layer (ipsec_check_global_policy()
1292 * failed), we will not deliver it to the ULP, even though they
1293 * are *willing* to accept in *clear*. This is fine as our global
1294 * disposition to icmp messages asks us reject the datagram.
1295 *
1296 * b) If we accept data at the IP layer (ipsec_check_global_policy()
1297 * succeeded or icmp_accept_messages_in_clear is 1), and not able
1298 * to deliver it to ULP (policy failed), it can lead to
1299 * consistency problems. The cases known at this time are
1300 * ICMP_DESTINATION_UNREACHABLE messages with following code
1301 * values :
1302 *
1303 * - ICMP_FRAGMENTATION_NEEDED : IP adapts to the new value
1304 * and Upper layer rejects. Then the communication will
1305 * come to a stop. This is solved by making similar decisions
1306 * at both levels. Currently, when we are unable to deliver
1307 * to the Upper Layer (due to policy failures) while IP has
1308 * adjusted dce_pmtu, the next outbound datagram would
1309 * generate a local ICMP_FRAGMENTATION_NEEDED message - which
1310 * will be with the right level of protection. Thus the right
1311 * value will be communicated even if we are not able to
1312 * communicate when we get from the wire initially. But this
1313 * assumes there would be at least one outbound datagram after
1314 * IP has adjusted its dce_pmtu value. To make things
1315 * simpler, we accept in clear after the validation of
1316 * AH/ESP headers.
1317 *
1318 * - Other ICMP ERRORS : We may not be able to deliver it to the
1319 * upper layer depending on the level of protection the upper
1320 * layer expects and the disposition in ipsec_inbound_accept_clear().
1321 * ipsec_inbound_accept_clear() decides whether a given ICMP error
1322 * should be accepted in clear when the Upper layer expects secure.
1323 * Thus the communication may get aborted by some bad ICMP
1324 * packets.
1325 */
1326 mblk_t *
1327 icmp_inbound_v4(mblk_t *mp, ip_recv_attr_t *ira)
1328 {
1329 icmph_t *icmph;
1330 ipha_t *ipha; /* Outer header */
1331 int ip_hdr_length; /* Outer header length */
1332 boolean_t interested;
1333 ipif_t *ipif;
1334 uint32_t ts;
1335 uint32_t *tsp;
1336 timestruc_t now;
1337 ill_t *ill = ira->ira_ill;
1338 ip_stack_t *ipst = ill->ill_ipst;
1339 zoneid_t zoneid = ira->ira_zoneid;
1340 int len_needed;
1341 mblk_t *mp_ret = NULL;
1342
1343 ipha = (ipha_t *)mp->b_rptr;
1344
1345 BUMP_MIB(&ipst->ips_icmp_mib, icmpInMsgs);
1346
1347 ip_hdr_length = ira->ira_ip_hdr_length;
1348 if ((mp->b_wptr - mp->b_rptr) < (ip_hdr_length + ICMPH_SIZE)) {
1349 if (ira->ira_pktlen < (ip_hdr_length + ICMPH_SIZE)) {
1350 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInTruncatedPkts);
1351 ip_drop_input("ipIfStatsInTruncatedPkts", mp, ill);
1352 freemsg(mp);
1353 return (NULL);
1354 }
1355 /* Last chance to get real. */
1356 ipha = ip_pullup(mp, ip_hdr_length + ICMPH_SIZE, ira);
1357 if (ipha == NULL) {
1358 BUMP_MIB(&ipst->ips_icmp_mib, icmpInErrors);
1359 freemsg(mp);
1360 return (NULL);
1361 }
1362 }
1363
1364 /* The IP header will always be a multiple of four bytes */
1365 icmph = (icmph_t *)&mp->b_rptr[ip_hdr_length];
1366 ip2dbg(("icmp_inbound_v4: type %d code %d\n", icmph->icmph_type,
1367 icmph->icmph_code));
1368
1369 /*
1370 * We will set "interested" to "true" if we should pass a copy to
1371 * the transport or if we handle the packet locally.
1372 */
1373 interested = B_FALSE;
1374 switch (icmph->icmph_type) {
1375 case ICMP_ECHO_REPLY:
1376 BUMP_MIB(&ipst->ips_icmp_mib, icmpInEchoReps);
1377 break;
1378 case ICMP_DEST_UNREACHABLE:
1379 if (icmph->icmph_code == ICMP_FRAGMENTATION_NEEDED)
1380 BUMP_MIB(&ipst->ips_icmp_mib, icmpInFragNeeded);
1381 interested = B_TRUE; /* Pass up to transport */
1382 BUMP_MIB(&ipst->ips_icmp_mib, icmpInDestUnreachs);
1383 break;
1384 case ICMP_SOURCE_QUENCH:
1385 interested = B_TRUE; /* Pass up to transport */
1386 BUMP_MIB(&ipst->ips_icmp_mib, icmpInSrcQuenchs);
1387 break;
1388 case ICMP_REDIRECT:
1389 if (!ipst->ips_ip_ignore_redirect)
1390 interested = B_TRUE;
1391 BUMP_MIB(&ipst->ips_icmp_mib, icmpInRedirects);
1392 break;
1393 case ICMP_ECHO_REQUEST:
1394 /*
1395 * Whether to respond to echo requests that come in as IP
1396 * broadcasts or as IP multicast is subject to debate
1397 * (what isn't?). We aim to please, you pick it.
1398 * Default is do it.
1399 */
1400 if (ira->ira_flags & IRAF_MULTICAST) {
1401 /* multicast: respond based on tunable */
1402 interested = ipst->ips_ip_g_resp_to_echo_mcast;
1403 } else if (ira->ira_flags & IRAF_BROADCAST) {
1404 /* broadcast: respond based on tunable */
1405 interested = ipst->ips_ip_g_resp_to_echo_bcast;
1406 } else {
1407 /* unicast: always respond */
1408 interested = B_TRUE;
1409 }
1410 BUMP_MIB(&ipst->ips_icmp_mib, icmpInEchos);
1411 if (!interested) {
1412 /* We never pass these to RAW sockets */
1413 freemsg(mp);
1414 return (NULL);
1415 }
1416
1417 /* Check db_ref to make sure we can modify the packet. */
1418 if (mp->b_datap->db_ref > 1) {
1419 mblk_t *mp1;
1420
1421 mp1 = copymsg(mp);
1422 freemsg(mp);
1423 if (!mp1) {
1424 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutDrops);
1425 return (NULL);
1426 }
1427 mp = mp1;
1428 ipha = (ipha_t *)mp->b_rptr;
1429 icmph = (icmph_t *)&mp->b_rptr[ip_hdr_length];
1430 }
1431 icmph->icmph_type = ICMP_ECHO_REPLY;
1432 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutEchoReps);
1433 icmp_send_reply_v4(mp, ipha, icmph, ira);
1434 return (NULL);
1435
1436 case ICMP_ROUTER_ADVERTISEMENT:
1437 case ICMP_ROUTER_SOLICITATION:
1438 break;
1439 case ICMP_TIME_EXCEEDED:
1440 interested = B_TRUE; /* Pass up to transport */
1441 BUMP_MIB(&ipst->ips_icmp_mib, icmpInTimeExcds);
1442 break;
1443 case ICMP_PARAM_PROBLEM:
1444 interested = B_TRUE; /* Pass up to transport */
1445 BUMP_MIB(&ipst->ips_icmp_mib, icmpInParmProbs);
1446 break;
1447 case ICMP_TIME_STAMP_REQUEST:
1448 /* Response to Time Stamp Requests is local policy. */
1449 if (ipst->ips_ip_g_resp_to_timestamp) {
1450 if (ira->ira_flags & IRAF_MULTIBROADCAST)
1451 interested =
1452 ipst->ips_ip_g_resp_to_timestamp_bcast;
1453 else
1454 interested = B_TRUE;
1455 }
1456 if (!interested) {
1457 /* We never pass these to RAW sockets */
1458 freemsg(mp);
1459 return (NULL);
1460 }
1461
1462 /* Make sure we have enough of the packet */
1463 len_needed = ip_hdr_length + ICMPH_SIZE +
1464 3 * sizeof (uint32_t);
1465
1466 if (mp->b_wptr - mp->b_rptr < len_needed) {
1467 ipha = ip_pullup(mp, len_needed, ira);
1468 if (ipha == NULL) {
1469 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
1470 ip_drop_input("ipIfStatsInDiscards - ip_pullup",
1471 mp, ill);
1472 freemsg(mp);
1473 return (NULL);
1474 }
1475 /* Refresh following the pullup. */
1476 icmph = (icmph_t *)&mp->b_rptr[ip_hdr_length];
1477 }
1478 BUMP_MIB(&ipst->ips_icmp_mib, icmpInTimestamps);
1479 /* Check db_ref to make sure we can modify the packet. */
1480 if (mp->b_datap->db_ref > 1) {
1481 mblk_t *mp1;
1482
1483 mp1 = copymsg(mp);
1484 freemsg(mp);
1485 if (!mp1) {
1486 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutDrops);
1487 return (NULL);
1488 }
1489 mp = mp1;
1490 ipha = (ipha_t *)mp->b_rptr;
1491 icmph = (icmph_t *)&mp->b_rptr[ip_hdr_length];
1492 }
1493 icmph->icmph_type = ICMP_TIME_STAMP_REPLY;
1494 tsp = (uint32_t *)&icmph[1];
1495 tsp++; /* Skip past 'originate time' */
1496 /* Compute # of milliseconds since midnight */
1497 gethrestime(&now);
1498 ts = (now.tv_sec % (24 * 60 * 60)) * 1000 +
1499 now.tv_nsec / (NANOSEC / MILLISEC);
1500 *tsp++ = htonl(ts); /* Lay in 'receive time' */
1501 *tsp++ = htonl(ts); /* Lay in 'send time' */
1502 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutTimestampReps);
1503 icmp_send_reply_v4(mp, ipha, icmph, ira);
1504 return (NULL);
1505
1506 case ICMP_TIME_STAMP_REPLY:
1507 BUMP_MIB(&ipst->ips_icmp_mib, icmpInTimestampReps);
1508 break;
1509 case ICMP_INFO_REQUEST:
1510 /* Per RFC 1122 3.2.2.7, ignore this. */
1511 case ICMP_INFO_REPLY:
1512 break;
1513 case ICMP_ADDRESS_MASK_REQUEST:
1514 if (ira->ira_flags & IRAF_MULTIBROADCAST) {
1515 interested =
1516 ipst->ips_ip_respond_to_address_mask_broadcast;
1517 } else {
1518 interested = B_TRUE;
1519 }
1520 if (!interested) {
1521 /* We never pass these to RAW sockets */
1522 freemsg(mp);
1523 return (NULL);
1524 }
1525 len_needed = ip_hdr_length + ICMPH_SIZE + IP_ADDR_LEN;
1526 if (mp->b_wptr - mp->b_rptr < len_needed) {
1527 ipha = ip_pullup(mp, len_needed, ira);
1528 if (ipha == NULL) {
1529 BUMP_MIB(ill->ill_ip_mib,
1530 ipIfStatsInTruncatedPkts);
1531 ip_drop_input("ipIfStatsInTruncatedPkts", mp,
1532 ill);
1533 freemsg(mp);
1534 return (NULL);
1535 }
1536 /* Refresh following the pullup. */
1537 icmph = (icmph_t *)&mp->b_rptr[ip_hdr_length];
1538 }
1539 BUMP_MIB(&ipst->ips_icmp_mib, icmpInAddrMasks);
1540 /* Check db_ref to make sure we can modify the packet. */
1541 if (mp->b_datap->db_ref > 1) {
1542 mblk_t *mp1;
1543
1544 mp1 = copymsg(mp);
1545 freemsg(mp);
1546 if (!mp1) {
1547 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutDrops);
1548 return (NULL);
1549 }
1550 mp = mp1;
1551 ipha = (ipha_t *)mp->b_rptr;
1552 icmph = (icmph_t *)&mp->b_rptr[ip_hdr_length];
1553 }
1554 /*
1555 * Need the ipif with the mask be the same as the source
1556 * address of the mask reply. For unicast we have a specific
1557 * ipif. For multicast/broadcast we only handle onlink
1558 * senders, and use the source address to pick an ipif.
1559 */
1560 ipif = ipif_lookup_addr(ipha->ipha_dst, ill, zoneid, ipst);
1561 if (ipif == NULL) {
1562 /* Broadcast or multicast */
1563 ipif = ipif_lookup_remote(ill, ipha->ipha_src, zoneid);
1564 if (ipif == NULL) {
1565 freemsg(mp);
1566 return (NULL);
1567 }
1568 }
1569 icmph->icmph_type = ICMP_ADDRESS_MASK_REPLY;
1570 bcopy(&ipif->ipif_net_mask, &icmph[1], IP_ADDR_LEN);
1571 ipif_refrele(ipif);
1572 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutAddrMaskReps);
1573 icmp_send_reply_v4(mp, ipha, icmph, ira);
1574 return (NULL);
1575
1576 case ICMP_ADDRESS_MASK_REPLY:
1577 BUMP_MIB(&ipst->ips_icmp_mib, icmpInAddrMaskReps);
1578 break;
1579 default:
1580 interested = B_TRUE; /* Pass up to transport */
1581 BUMP_MIB(&ipst->ips_icmp_mib, icmpInUnknowns);
1582 break;
1583 }
1584 /*
1585 * See if there is an ICMP client to avoid an extra copymsg/freemsg
1586 * if there isn't one.
1587 */
1588 if (ipst->ips_ipcl_proto_fanout_v4[IPPROTO_ICMP].connf_head != NULL) {
1589 /* If there is an ICMP client and we want one too, copy it. */
1590
1591 if (!interested) {
1592 /* Caller will deliver to RAW sockets */
1593 return (mp);
1594 }
1595 mp_ret = copymsg(mp);
1596 if (mp_ret == NULL) {
1597 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
1598 ip_drop_input("ipIfStatsInDiscards - copymsg", mp, ill);
1599 }
1600 } else if (!interested) {
1601 /* Neither we nor raw sockets are interested. Drop packet now */
1602 freemsg(mp);
1603 return (NULL);
1604 }
1605
1606 /*
1607 * ICMP error or redirect packet. Make sure we have enough of
1608 * the header and that db_ref == 1 since we might end up modifying
1609 * the packet.
1610 */
1611 if (mp->b_cont != NULL) {
1612 if (ip_pullup(mp, -1, ira) == NULL) {
1613 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
1614 ip_drop_input("ipIfStatsInDiscards - ip_pullup",
1615 mp, ill);
1616 freemsg(mp);
1617 return (mp_ret);
1618 }
1619 }
1620
1621 if (mp->b_datap->db_ref > 1) {
1622 mblk_t *mp1;
1623
1624 mp1 = copymsg(mp);
1625 if (mp1 == NULL) {
1626 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
1627 ip_drop_input("ipIfStatsInDiscards - copymsg", mp, ill);
1628 freemsg(mp);
1629 return (mp_ret);
1630 }
1631 freemsg(mp);
1632 mp = mp1;
1633 }
1634
1635 /*
1636 * In case mp has changed, verify the message before any further
1637 * processes.
1638 */
1639 ipha = (ipha_t *)mp->b_rptr;
1640 icmph = (icmph_t *)&mp->b_rptr[ip_hdr_length];
1641 if (!icmp_inbound_verify_v4(mp, icmph, ira)) {
1642 freemsg(mp);
1643 return (mp_ret);
1644 }
1645
1646 switch (icmph->icmph_type) {
1647 case ICMP_REDIRECT:
1648 icmp_redirect_v4(mp, ipha, icmph, ira);
1649 break;
1650 case ICMP_DEST_UNREACHABLE:
1651 if (icmph->icmph_code == ICMP_FRAGMENTATION_NEEDED) {
1652 /* Update DCE and adjust MTU is icmp header if needed */
1653 icmp_inbound_too_big_v4(icmph, ira);
1654 }
1655 /* FALLTHRU */
1656 default:
1657 icmp_inbound_error_fanout_v4(mp, icmph, ira);
1658 break;
1659 }
1660 return (mp_ret);
1661 }
1662
1663 /*
1664 * Send an ICMP echo, timestamp or address mask reply.
1665 * The caller has already updated the payload part of the packet.
1666 * We handle the ICMP checksum, IP source address selection and feed
1667 * the packet into ip_output_simple.
1668 */
1669 static void
1670 icmp_send_reply_v4(mblk_t *mp, ipha_t *ipha, icmph_t *icmph,
1671 ip_recv_attr_t *ira)
1672 {
1673 uint_t ip_hdr_length = ira->ira_ip_hdr_length;
1674 ill_t *ill = ira->ira_ill;
1675 ip_stack_t *ipst = ill->ill_ipst;
1676 ip_xmit_attr_t ixas;
1677
1678 /* Send out an ICMP packet */
1679 icmph->icmph_checksum = 0;
1680 icmph->icmph_checksum = IP_CSUM(mp, ip_hdr_length, 0);
1681 /* Reset time to live. */
1682 ipha->ipha_ttl = ipst->ips_ip_def_ttl;
1683 {
1684 /* Swap source and destination addresses */
1685 ipaddr_t tmp;
1686
1687 tmp = ipha->ipha_src;
1688 ipha->ipha_src = ipha->ipha_dst;
1689 ipha->ipha_dst = tmp;
1690 }
1691 ipha->ipha_ident = 0;
1692 if (!IS_SIMPLE_IPH(ipha))
1693 icmp_options_update(ipha);
1694
1695 bzero(&ixas, sizeof (ixas));
1696 ixas.ixa_flags = IXAF_BASIC_SIMPLE_V4;
1697 ixas.ixa_zoneid = ira->ira_zoneid;
1698 ixas.ixa_cred = kcred;
1699 ixas.ixa_cpid = NOPID;
1700 ixas.ixa_tsl = ira->ira_tsl; /* Behave as a multi-level responder */
1701 ixas.ixa_ifindex = 0;
1702 ixas.ixa_ipst = ipst;
1703 ixas.ixa_multicast_ttl = IP_DEFAULT_MULTICAST_TTL;
1704
1705 if (!(ira->ira_flags & IRAF_IPSEC_SECURE)) {
1706 /*
1707 * This packet should go out the same way as it
1708 * came in i.e in clear, independent of the IPsec policy
1709 * for transmitting packets.
1710 */
1711 ixas.ixa_flags |= IXAF_NO_IPSEC;
1712 } else {
1713 if (!ipsec_in_to_out(ira, &ixas, mp, ipha, NULL)) {
1714 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
1715 /* Note: mp already consumed and ip_drop_packet done */
1716 return;
1717 }
1718 }
1719 if (ira->ira_flags & IRAF_MULTIBROADCAST) {
1720 /*
1721 * Not one or our addresses (IRE_LOCALs), thus we let
1722 * ip_output_simple pick the source.
1723 */
1724 ipha->ipha_src = INADDR_ANY;
1725 ixas.ixa_flags |= IXAF_SET_SOURCE;
1726 }
1727 /* Should we send with DF and use dce_pmtu? */
1728 if (ipst->ips_ipv4_icmp_return_pmtu) {
1729 ixas.ixa_flags |= IXAF_PMTU_DISCOVERY;
1730 ipha->ipha_fragment_offset_and_flags |= IPH_DF_HTONS;
1731 }
1732
1733 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutMsgs);
1734
1735 (void) ip_output_simple(mp, &ixas);
1736 ixa_cleanup(&ixas);
1737 }
1738
1739 /*
1740 * Verify the ICMP messages for either for ICMP error or redirect packet.
1741 * The caller should have fully pulled up the message. If it's a redirect
1742 * packet, only basic checks on IP header will be done; otherwise, verify
1743 * the packet by looking at the included ULP header.
1744 *
1745 * Called before icmp_inbound_error_fanout_v4 is called.
1746 */
1747 static boolean_t
1748 icmp_inbound_verify_v4(mblk_t *mp, icmph_t *icmph, ip_recv_attr_t *ira)
1749 {
1750 ill_t *ill = ira->ira_ill;
1751 int hdr_length;
1752 ip_stack_t *ipst = ira->ira_ill->ill_ipst;
1753 conn_t *connp;
1754 ipha_t *ipha; /* Inner IP header */
1755
1756 ipha = (ipha_t *)&icmph[1];
1757 if ((uchar_t *)ipha + IP_SIMPLE_HDR_LENGTH > mp->b_wptr)
1758 goto truncated;
1759
1760 hdr_length = IPH_HDR_LENGTH(ipha);
1761
1762 if ((IPH_HDR_VERSION(ipha) != IPV4_VERSION))
1763 goto discard_pkt;
1764
1765 if (hdr_length < sizeof (ipha_t))
1766 goto truncated;
1767
1768 if ((uchar_t *)ipha + hdr_length > mp->b_wptr)
1769 goto truncated;
1770
1771 /*
1772 * Stop here for ICMP_REDIRECT.
1773 */
1774 if (icmph->icmph_type == ICMP_REDIRECT)
1775 return (B_TRUE);
1776
1777 /*
1778 * ICMP errors only.
1779 */
1780 switch (ipha->ipha_protocol) {
1781 case IPPROTO_UDP:
1782 /*
1783 * Verify we have at least ICMP_MIN_TP_HDR_LEN bytes of
1784 * transport header.
1785 */
1786 if ((uchar_t *)ipha + hdr_length + ICMP_MIN_TP_HDR_LEN >
1787 mp->b_wptr)
1788 goto truncated;
1789 break;
1790 case IPPROTO_TCP: {
1791 tcpha_t *tcpha;
1792
1793 /*
1794 * Verify we have at least ICMP_MIN_TP_HDR_LEN bytes of
1795 * transport header.
1796 */
1797 if ((uchar_t *)ipha + hdr_length + ICMP_MIN_TP_HDR_LEN >
1798 mp->b_wptr)
1799 goto truncated;
1800
1801 tcpha = (tcpha_t *)((uchar_t *)ipha + hdr_length);
1802 connp = ipcl_tcp_lookup_reversed_ipv4(ipha, tcpha, TCPS_LISTEN,
1803 ipst);
1804 if (connp == NULL)
1805 goto discard_pkt;
1806
1807 if ((connp->conn_verifyicmp != NULL) &&
1808 !connp->conn_verifyicmp(connp, tcpha, icmph, NULL, ira)) {
1809 CONN_DEC_REF(connp);
1810 goto discard_pkt;
1811 }
1812 CONN_DEC_REF(connp);
1813 break;
1814 }
1815 case IPPROTO_SCTP:
1816 /*
1817 * Verify we have at least ICMP_MIN_TP_HDR_LEN bytes of
1818 * transport header.
1819 */
1820 if ((uchar_t *)ipha + hdr_length + ICMP_MIN_TP_HDR_LEN >
1821 mp->b_wptr)
1822 goto truncated;
1823 break;
1824 case IPPROTO_ESP:
1825 case IPPROTO_AH:
1826 break;
1827 case IPPROTO_ENCAP:
1828 if ((uchar_t *)ipha + hdr_length + sizeof (ipha_t) >
1829 mp->b_wptr)
1830 goto truncated;
1831 break;
1832 default:
1833 break;
1834 }
1835
1836 return (B_TRUE);
1837
1838 discard_pkt:
1839 /* Bogus ICMP error. */
1840 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
1841 return (B_FALSE);
1842
1843 truncated:
1844 /* We pulled up everthing already. Must be truncated */
1845 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInTruncatedPkts);
1846 ip_drop_input("ipIfStatsInTruncatedPkts", mp, ill);
1847 return (B_FALSE);
1848 }
1849
1850 /* Table from RFC 1191 */
1851 static int icmp_frag_size_table[] =
1852 { 32000, 17914, 8166, 4352, 2002, 1496, 1006, 508, 296, 68 };
1853
1854 /*
1855 * Process received ICMP Packet too big.
1856 * Just handles the DCE create/update, including using the above table of
1857 * PMTU guesses. The caller is responsible for validating the packet before
1858 * passing it in and also to fanout the ICMP error to any matching transport
1859 * conns. Assumes the message has been fully pulled up and verified.
1860 *
1861 * Before getting here, the caller has called icmp_inbound_verify_v4()
1862 * that should have verified with ULP to prevent undoing the changes we're
1863 * going to make to DCE. For example, TCP might have verified that the packet
1864 * which generated error is in the send window.
1865 *
1866 * In some cases modified this MTU in the ICMP header packet; the caller
1867 * should pass to the matching ULP after this returns.
1868 */
1869 static void
1870 icmp_inbound_too_big_v4(icmph_t *icmph, ip_recv_attr_t *ira)
1871 {
1872 dce_t *dce;
1873 int old_mtu;
1874 int mtu, orig_mtu;
1875 ipaddr_t dst;
1876 boolean_t disable_pmtud;
1877 ill_t *ill = ira->ira_ill;
1878 ip_stack_t *ipst = ill->ill_ipst;
1879 uint_t hdr_length;
1880 ipha_t *ipha;
1881
1882 /* Caller already pulled up everything. */
1883 ipha = (ipha_t *)&icmph[1];
1884 ASSERT(icmph->icmph_type == ICMP_DEST_UNREACHABLE &&
1885 icmph->icmph_code == ICMP_FRAGMENTATION_NEEDED);
1886 ASSERT(ill != NULL);
1887
1888 hdr_length = IPH_HDR_LENGTH(ipha);
1889
1890 /*
1891 * We handle path MTU for source routed packets since the DCE
1892 * is looked up using the final destination.
1893 */
1894 dst = ip_get_dst(ipha);
1895
1896 dce = dce_lookup_and_add_v4(dst, ipst);
1897 if (dce == NULL) {
1898 /* Couldn't add a unique one - ENOMEM */
1899 ip1dbg(("icmp_inbound_too_big_v4: no dce for 0x%x\n",
1900 ntohl(dst)));
1901 return;
1902 }
1903
1904 /* Check for MTU discovery advice as described in RFC 1191 */
1905 mtu = ntohs(icmph->icmph_du_mtu);
1906 orig_mtu = mtu;
1907 disable_pmtud = B_FALSE;
1908
1909 mutex_enter(&dce->dce_lock);
1910 if (dce->dce_flags & DCEF_PMTU)
1911 old_mtu = dce->dce_pmtu;
1912 else
1913 old_mtu = ill->ill_mtu;
1914
1915 if (icmph->icmph_du_zero != 0 || mtu < ipst->ips_ip_pmtu_min) {
1916 uint32_t length;
1917 int i;
1918
1919 /*
1920 * Use the table from RFC 1191 to figure out
1921 * the next "plateau" based on the length in
1922 * the original IP packet.
1923 */
1924 length = ntohs(ipha->ipha_length);
1925 DTRACE_PROBE2(ip4__pmtu__guess, dce_t *, dce,
1926 uint32_t, length);
1927 if (old_mtu <= length &&
1928 old_mtu >= length - hdr_length) {
1929 /*
1930 * Handle broken BSD 4.2 systems that
1931 * return the wrong ipha_length in ICMP
1932 * errors.
1933 */
1934 ip1dbg(("Wrong mtu: sent %d, dce %d\n",
1935 length, old_mtu));
1936 length -= hdr_length;
1937 }
1938 for (i = 0; i < A_CNT(icmp_frag_size_table); i++) {
1939 if (length > icmp_frag_size_table[i])
1940 break;
1941 }
1942 if (i == A_CNT(icmp_frag_size_table)) {
1943 /* Smaller than IP_MIN_MTU! */
1944 ip1dbg(("Too big for packet size %d\n",
1945 length));
1946 disable_pmtud = B_TRUE;
1947 mtu = ipst->ips_ip_pmtu_min;
1948 } else {
1949 mtu = icmp_frag_size_table[i];
1950 ip1dbg(("Calculated mtu %d, packet size %d, "
1951 "before %d\n", mtu, length, old_mtu));
1952 if (mtu < ipst->ips_ip_pmtu_min) {
1953 mtu = ipst->ips_ip_pmtu_min;
1954 disable_pmtud = B_TRUE;
1955 }
1956 }
1957 }
1958 if (disable_pmtud)
1959 dce->dce_flags |= DCEF_TOO_SMALL_PMTU;
1960 else
1961 dce->dce_flags &= ~DCEF_TOO_SMALL_PMTU;
1962
1963 dce->dce_pmtu = MIN(old_mtu, mtu);
1964 /* Prepare to send the new max frag size for the ULP. */
1965 icmph->icmph_du_zero = 0;
1966 icmph->icmph_du_mtu = htons((uint16_t)dce->dce_pmtu);
1967 DTRACE_PROBE4(ip4__pmtu__change, icmph_t *, icmph, dce_t *,
1968 dce, int, orig_mtu, int, mtu);
1969
1970 /* We now have a PMTU for sure */
1971 dce->dce_flags |= DCEF_PMTU;
1972 dce->dce_last_change_time = TICK_TO_SEC(ddi_get_lbolt64());
1973 mutex_exit(&dce->dce_lock);
1974 /*
1975 * After dropping the lock the new value is visible to everyone.
1976 * Then we bump the generation number so any cached values reinspect
1977 * the dce_t.
1978 */
1979 dce_increment_generation(dce);
1980 dce_refrele(dce);
1981 }
1982
1983 /*
1984 * If the packet in error is Self-Encapsulated, icmp_inbound_error_fanout_v4
1985 * calls this function.
1986 */
1987 static mblk_t *
1988 icmp_inbound_self_encap_error_v4(mblk_t *mp, ipha_t *ipha, ipha_t *in_ipha)
1989 {
1990 int length;
1991
1992 ASSERT(mp->b_datap->db_type == M_DATA);
1993
1994 /* icmp_inbound_v4 has already pulled up the whole error packet */
1995 ASSERT(mp->b_cont == NULL);
1996
1997 /*
1998 * The length that we want to overlay is the inner header
1999 * and what follows it.
2000 */
2001 length = msgdsize(mp) - ((uchar_t *)in_ipha - mp->b_rptr);
2002
2003 /*
2004 * Overlay the inner header and whatever follows it over the
2005 * outer header.
2006 */
2007 bcopy((uchar_t *)in_ipha, (uchar_t *)ipha, length);
2008
2009 /* Adjust for what we removed */
2010 mp->b_wptr -= (uchar_t *)in_ipha - (uchar_t *)ipha;
2011 return (mp);
2012 }
2013
2014 /*
2015 * Try to pass the ICMP message upstream in case the ULP cares.
2016 *
2017 * If the packet that caused the ICMP error is secure, we send
2018 * it to AH/ESP to make sure that the attached packet has a
2019 * valid association. ipha in the code below points to the
2020 * IP header of the packet that caused the error.
2021 *
2022 * For IPsec cases, we let the next-layer-up (which has access to
2023 * cached policy on the conn_t, or can query the SPD directly)
2024 * subtract out any IPsec overhead if they must. We therefore make no
2025 * adjustments here for IPsec overhead.
2026 *
2027 * IFN could have been generated locally or by some router.
2028 *
2029 * LOCAL : ire_send_wire (before calling ipsec_out_process) can call
2030 * icmp_frag_needed/icmp_pkt2big_v6 to generated a local IFN.
2031 * This happens because IP adjusted its value of MTU on an
2032 * earlier IFN message and could not tell the upper layer,
2033 * the new adjusted value of MTU e.g. Packet was encrypted
2034 * or there was not enough information to fanout to upper
2035 * layers. Thus on the next outbound datagram, ire_send_wire
2036 * generates the IFN, where IPsec processing has *not* been
2037 * done.
2038 *
2039 * Note that we retain ixa_fragsize across IPsec thus once
2040 * we have picking ixa_fragsize and entered ipsec_out_process we do
2041 * no change the fragsize even if the path MTU changes before
2042 * we reach ip_output_post_ipsec.
2043 *
2044 * In the local case, IRAF_LOOPBACK will be set indicating
2045 * that IFN was generated locally.
2046 *
2047 * ROUTER : IFN could be secure or non-secure.
2048 *
2049 * * SECURE : We use the IPSEC_IN to fanout to AH/ESP if the
2050 * packet in error has AH/ESP headers to validate the AH/ESP
2051 * headers. AH/ESP will verify whether there is a valid SA or
2052 * not and send it back. We will fanout again if we have more
2053 * data in the packet.
2054 *
2055 * If the packet in error does not have AH/ESP, we handle it
2056 * like any other case.
2057 *
2058 * * NON_SECURE : If the packet in error has AH/ESP headers, we send it
2059 * up to AH/ESP for validation. AH/ESP will verify whether there is a
2060 * valid SA or not and send it back. We will fanout again if
2061 * we have more data in the packet.
2062 *
2063 * If the packet in error does not have AH/ESP, we handle it
2064 * like any other case.
2065 *
2066 * The caller must have called icmp_inbound_verify_v4.
2067 */
2068 static void
2069 icmp_inbound_error_fanout_v4(mblk_t *mp, icmph_t *icmph, ip_recv_attr_t *ira)
2070 {
2071 uint16_t *up; /* Pointer to ports in ULP header */
2072 uint32_t ports; /* reversed ports for fanout */
2073 ipha_t ripha; /* With reversed addresses */
2074 ipha_t *ipha; /* Inner IP header */
2075 uint_t hdr_length; /* Inner IP header length */
2076 tcpha_t *tcpha;
2077 conn_t *connp;
2078 ill_t *ill = ira->ira_ill;
2079 ip_stack_t *ipst = ill->ill_ipst;
2080 ipsec_stack_t *ipss = ipst->ips_netstack->netstack_ipsec;
2081 ill_t *rill = ira->ira_rill;
2082
2083 /* Caller already pulled up everything. */
2084 ipha = (ipha_t *)&icmph[1];
2085 ASSERT((uchar_t *)&ipha[1] <= mp->b_wptr);
2086 ASSERT(mp->b_cont == NULL);
2087
2088 hdr_length = IPH_HDR_LENGTH(ipha);
2089 ira->ira_protocol = ipha->ipha_protocol;
2090
2091 /*
2092 * We need a separate IP header with the source and destination
2093 * addresses reversed to do fanout/classification because the ipha in
2094 * the ICMP error is in the form we sent it out.
2095 */
2096 ripha.ipha_src = ipha->ipha_dst;
2097 ripha.ipha_dst = ipha->ipha_src;
2098 ripha.ipha_protocol = ipha->ipha_protocol;
2099 ripha.ipha_version_and_hdr_length = ipha->ipha_version_and_hdr_length;
2100
2101 ip2dbg(("icmp_inbound_error_v4: proto %d %x to %x: %d/%d\n",
2102 ripha.ipha_protocol, ntohl(ipha->ipha_src),
2103 ntohl(ipha->ipha_dst),
2104 icmph->icmph_type, icmph->icmph_code));
2105
2106 switch (ipha->ipha_protocol) {
2107 case IPPROTO_UDP:
2108 up = (uint16_t *)((uchar_t *)ipha + hdr_length);
2109
2110 /* Attempt to find a client stream based on port. */
2111 ip2dbg(("icmp_inbound_error_v4: UDP ports %d to %d\n",
2112 ntohs(up[0]), ntohs(up[1])));
2113
2114 /* Note that we send error to all matches. */
2115 ira->ira_flags |= IRAF_ICMP_ERROR;
2116 ip_fanout_udp_multi_v4(mp, &ripha, up[0], up[1], ira);
2117 ira->ira_flags &= ~IRAF_ICMP_ERROR;
2118 return;
2119
2120 case IPPROTO_TCP:
2121 /*
2122 * Find a TCP client stream for this packet.
2123 * Note that we do a reverse lookup since the header is
2124 * in the form we sent it out.
2125 */
2126 tcpha = (tcpha_t *)((uchar_t *)ipha + hdr_length);
2127 connp = ipcl_tcp_lookup_reversed_ipv4(ipha, tcpha, TCPS_LISTEN,
2128 ipst);
2129 if (connp == NULL)
2130 goto discard_pkt;
2131
2132 if (CONN_INBOUND_POLICY_PRESENT(connp, ipss) ||
2133 (ira->ira_flags & IRAF_IPSEC_SECURE)) {
2134 mp = ipsec_check_inbound_policy(mp, connp,
2135 ipha, NULL, ira);
2136 if (mp == NULL) {
2137 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
2138 /* Note that mp is NULL */
2139 ip_drop_input("ipIfStatsInDiscards", mp, ill);
2140 CONN_DEC_REF(connp);
2141 return;
2142 }
2143 }
2144
2145 ira->ira_flags |= IRAF_ICMP_ERROR;
2146 ira->ira_ill = ira->ira_rill = NULL;
2147 if (IPCL_IS_TCP(connp)) {
2148 SQUEUE_ENTER_ONE(connp->conn_sqp, mp,
2149 connp->conn_recvicmp, connp, ira, SQ_FILL,
2150 SQTAG_TCP_INPUT_ICMP_ERR);
2151 } else {
2152 /* Not TCP; must be SOCK_RAW, IPPROTO_TCP */
2153 (connp->conn_recv)(connp, mp, NULL, ira);
2154 CONN_DEC_REF(connp);
2155 }
2156 ira->ira_ill = ill;
2157 ira->ira_rill = rill;
2158 ira->ira_flags &= ~IRAF_ICMP_ERROR;
2159 return;
2160
2161 case IPPROTO_SCTP:
2162 up = (uint16_t *)((uchar_t *)ipha + hdr_length);
2163 /* Find a SCTP client stream for this packet. */
2164 ((uint16_t *)&ports)[0] = up[1];
2165 ((uint16_t *)&ports)[1] = up[0];
2166
2167 ira->ira_flags |= IRAF_ICMP_ERROR;
2168 ip_fanout_sctp(mp, &ripha, NULL, ports, ira);
2169 ira->ira_flags &= ~IRAF_ICMP_ERROR;
2170 return;
2171
2172 case IPPROTO_ESP:
2173 case IPPROTO_AH:
2174 if (!ipsec_loaded(ipss)) {
2175 ip_proto_not_sup(mp, ira);
2176 return;
2177 }
2178
2179 if (ipha->ipha_protocol == IPPROTO_ESP)
2180 mp = ipsecesp_icmp_error(mp, ira);
2181 else
2182 mp = ipsecah_icmp_error(mp, ira);
2183 if (mp == NULL)
2184 return;
2185
2186 /* Just in case ipsec didn't preserve the NULL b_cont */
2187 if (mp->b_cont != NULL) {
2188 if (!pullupmsg(mp, -1))
2189 goto discard_pkt;
2190 }
2191
2192 /*
2193 * Note that ira_pktlen and ira_ip_hdr_length are no longer
2194 * correct, but we don't use them any more here.
2195 *
2196 * If succesful, the mp has been modified to not include
2197 * the ESP/AH header so we can fanout to the ULP's icmp
2198 * error handler.
2199 */
2200 if (mp->b_wptr - mp->b_rptr < IP_SIMPLE_HDR_LENGTH)
2201 goto truncated;
2202
2203 /* Verify the modified message before any further processes. */
2204 ipha = (ipha_t *)mp->b_rptr;
2205 hdr_length = IPH_HDR_LENGTH(ipha);
2206 icmph = (icmph_t *)&mp->b_rptr[hdr_length];
2207 if (!icmp_inbound_verify_v4(mp, icmph, ira)) {
2208 freemsg(mp);
2209 return;
2210 }
2211
2212 icmp_inbound_error_fanout_v4(mp, icmph, ira);
2213 return;
2214
2215 case IPPROTO_ENCAP: {
2216 /* Look for self-encapsulated packets that caused an error */
2217 ipha_t *in_ipha;
2218
2219 /*
2220 * Caller has verified that length has to be
2221 * at least the size of IP header.
2222 */
2223 ASSERT(hdr_length >= sizeof (ipha_t));
2224 /*
2225 * Check the sanity of the inner IP header like
2226 * we did for the outer header.
2227 */
2228 in_ipha = (ipha_t *)((uchar_t *)ipha + hdr_length);
2229 if ((IPH_HDR_VERSION(in_ipha) != IPV4_VERSION)) {
2230 goto discard_pkt;
2231 }
2232 if (IPH_HDR_LENGTH(in_ipha) < sizeof (ipha_t)) {
2233 goto discard_pkt;
2234 }
2235 /* Check for Self-encapsulated tunnels */
2236 if (in_ipha->ipha_src == ipha->ipha_src &&
2237 in_ipha->ipha_dst == ipha->ipha_dst) {
2238
2239 mp = icmp_inbound_self_encap_error_v4(mp, ipha,
2240 in_ipha);
2241 if (mp == NULL)
2242 goto discard_pkt;
2243
2244 /*
2245 * Just in case self_encap didn't preserve the NULL
2246 * b_cont
2247 */
2248 if (mp->b_cont != NULL) {
2249 if (!pullupmsg(mp, -1))
2250 goto discard_pkt;
2251 }
2252 /*
2253 * Note that ira_pktlen and ira_ip_hdr_length are no
2254 * longer correct, but we don't use them any more here.
2255 */
2256 if (mp->b_wptr - mp->b_rptr < IP_SIMPLE_HDR_LENGTH)
2257 goto truncated;
2258
2259 /*
2260 * Verify the modified message before any further
2261 * processes.
2262 */
2263 ipha = (ipha_t *)mp->b_rptr;
2264 hdr_length = IPH_HDR_LENGTH(ipha);
2265 icmph = (icmph_t *)&mp->b_rptr[hdr_length];
2266 if (!icmp_inbound_verify_v4(mp, icmph, ira)) {
2267 freemsg(mp);
2268 return;
2269 }
2270
2271 /*
2272 * The packet in error is self-encapsualted.
2273 * And we are finding it further encapsulated
2274 * which we could not have possibly generated.
2275 */
2276 if (ipha->ipha_protocol == IPPROTO_ENCAP) {
2277 goto discard_pkt;
2278 }
2279 icmp_inbound_error_fanout_v4(mp, icmph, ira);
2280 return;
2281 }
2282 /* No self-encapsulated */
2283 /* FALLTHRU */
2284 }
2285 case IPPROTO_IPV6:
2286 if ((connp = ipcl_iptun_classify_v4(&ripha.ipha_src,
2287 &ripha.ipha_dst, ipst)) != NULL) {
2288 ira->ira_flags |= IRAF_ICMP_ERROR;
2289 connp->conn_recvicmp(connp, mp, NULL, ira);
2290 CONN_DEC_REF(connp);
2291 ira->ira_flags &= ~IRAF_ICMP_ERROR;
2292 return;
2293 }
2294 /*
2295 * No IP tunnel is interested, fallthrough and see
2296 * if a raw socket will want it.
2297 */
2298 /* FALLTHRU */
2299 default:
2300 ira->ira_flags |= IRAF_ICMP_ERROR;
2301 ip_fanout_proto_v4(mp, &ripha, ira);
2302 ira->ira_flags &= ~IRAF_ICMP_ERROR;
2303 return;
2304 }
2305 /* NOTREACHED */
2306 discard_pkt:
2307 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
2308 ip1dbg(("icmp_inbound_error_fanout_v4: drop pkt\n"));
2309 ip_drop_input("ipIfStatsInDiscards", mp, ill);
2310 freemsg(mp);
2311 return;
2312
2313 truncated:
2314 /* We pulled up everthing already. Must be truncated */
2315 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInTruncatedPkts);
2316 ip_drop_input("ipIfStatsInTruncatedPkts", mp, ill);
2317 freemsg(mp);
2318 }
2319
2320 /*
2321 * Common IP options parser.
2322 *
2323 * Setup routine: fill in *optp with options-parsing state, then
2324 * tail-call ipoptp_next to return the first option.
2325 */
2326 uint8_t
2327 ipoptp_first(ipoptp_t *optp, ipha_t *ipha)
2328 {
2329 uint32_t totallen; /* total length of all options */
2330
2331 totallen = ipha->ipha_version_and_hdr_length -
2332 (uint8_t)((IP_VERSION << 4) + IP_SIMPLE_HDR_LENGTH_IN_WORDS);
2333 totallen <<= 2;
2334 optp->ipoptp_next = (uint8_t *)(&ipha[1]);
2335 optp->ipoptp_end = optp->ipoptp_next + totallen;
2336 optp->ipoptp_flags = 0;
2337 return (ipoptp_next(optp));
2338 }
2339
2340 /* Like above but without an ipha_t */
2341 uint8_t
2342 ipoptp_first2(ipoptp_t *optp, uint32_t totallen, uint8_t *opt)
2343 {
2344 optp->ipoptp_next = opt;
2345 optp->ipoptp_end = optp->ipoptp_next + totallen;
2346 optp->ipoptp_flags = 0;
2347 return (ipoptp_next(optp));
2348 }
2349
2350 /*
2351 * Common IP options parser: extract next option.
2352 */
2353 uint8_t
2354 ipoptp_next(ipoptp_t *optp)
2355 {
2356 uint8_t *end = optp->ipoptp_end;
2357 uint8_t *cur = optp->ipoptp_next;
2358 uint8_t opt, len, pointer;
2359
2360 /*
2361 * If cur > end already, then the ipoptp_end or ipoptp_next pointer
2362 * has been corrupted.
2363 */
2364 ASSERT(cur <= end);
2365
2366 if (cur == end)
2367 return (IPOPT_EOL);
2368
2369 opt = cur[IPOPT_OPTVAL];
2370
2371 /*
2372 * Skip any NOP options.
2373 */
2374 while (opt == IPOPT_NOP) {
2375 cur++;
2376 if (cur == end)
2377 return (IPOPT_EOL);
2378 opt = cur[IPOPT_OPTVAL];
2379 }
2380
2381 if (opt == IPOPT_EOL)
2382 return (IPOPT_EOL);
2383
2384 /*
2385 * Option requiring a length.
2386 */
2387 if ((cur + 1) >= end) {
2388 optp->ipoptp_flags |= IPOPTP_ERROR;
2389 return (IPOPT_EOL);
2390 }
2391 len = cur[IPOPT_OLEN];
2392 if (len < 2) {
2393 optp->ipoptp_flags |= IPOPTP_ERROR;
2394 return (IPOPT_EOL);
2395 }
2396 optp->ipoptp_cur = cur;
2397 optp->ipoptp_len = len;
2398 optp->ipoptp_next = cur + len;
2399 if (cur + len > end) {
2400 optp->ipoptp_flags |= IPOPTP_ERROR;
2401 return (IPOPT_EOL);
2402 }
2403
2404 /*
2405 * For the options which require a pointer field, make sure
2406 * its there, and make sure it points to either something
2407 * inside this option, or the end of the option.
2408 */
2409 switch (opt) {
2410 case IPOPT_RR:
2411 case IPOPT_TS:
2412 case IPOPT_LSRR:
2413 case IPOPT_SSRR:
2414 if (len <= IPOPT_OFFSET) {
2415 optp->ipoptp_flags |= IPOPTP_ERROR;
2416 return (opt);
2417 }
2418 pointer = cur[IPOPT_OFFSET];
2419 if (pointer - 1 > len) {
2420 optp->ipoptp_flags |= IPOPTP_ERROR;
2421 return (opt);
2422 }
2423 break;
2424 }
2425
2426 /*
2427 * Sanity check the pointer field based on the type of the
2428 * option.
2429 */
2430 switch (opt) {
2431 case IPOPT_RR:
2432 case IPOPT_SSRR:
2433 case IPOPT_LSRR:
2434 if (pointer < IPOPT_MINOFF_SR)
2435 optp->ipoptp_flags |= IPOPTP_ERROR;
2436 break;
2437 case IPOPT_TS:
2438 if (pointer < IPOPT_MINOFF_IT)
2439 optp->ipoptp_flags |= IPOPTP_ERROR;
2440 /*
2441 * Note that the Internet Timestamp option also
2442 * contains two four bit fields (the Overflow field,
2443 * and the Flag field), which follow the pointer
2444 * field. We don't need to check that these fields
2445 * fall within the length of the option because this
2446 * was implicitely done above. We've checked that the
2447 * pointer value is at least IPOPT_MINOFF_IT, and that
2448 * it falls within the option. Since IPOPT_MINOFF_IT >
2449 * IPOPT_POS_OV_FLG, we don't need the explicit check.
2450 */
2451 ASSERT(len > IPOPT_POS_OV_FLG);
2452 break;
2453 }
2454
2455 return (opt);
2456 }
2457
2458 /*
2459 * Use the outgoing IP header to create an IP_OPTIONS option the way
2460 * it was passed down from the application.
2461 *
2462 * This is compatible with BSD in that it returns
2463 * the reverse source route with the final destination
2464 * as the last entry. The first 4 bytes of the option
2465 * will contain the final destination.
2466 */
2467 int
2468 ip_opt_get_user(conn_t *connp, uchar_t *buf)
2469 {
2470 ipoptp_t opts;
2471 uchar_t *opt;
2472 uint8_t optval;
2473 uint8_t optlen;
2474 uint32_t len = 0;
2475 uchar_t *buf1 = buf;
2476 uint32_t totallen;
2477 ipaddr_t dst;
2478 ip_pkt_t *ipp = &connp->conn_xmit_ipp;
2479
2480 if (!(ipp->ipp_fields & IPPF_IPV4_OPTIONS))
2481 return (0);
2482
2483 totallen = ipp->ipp_ipv4_options_len;
2484 if (totallen & 0x3)
2485 return (0);
2486
2487 buf += IP_ADDR_LEN; /* Leave room for final destination */
2488 len += IP_ADDR_LEN;
2489 bzero(buf1, IP_ADDR_LEN);
2490
2491 dst = connp->conn_faddr_v4;
2492
2493 for (optval = ipoptp_first2(&opts, totallen, ipp->ipp_ipv4_options);
2494 optval != IPOPT_EOL;
2495 optval = ipoptp_next(&opts)) {
2496 int off;
2497
2498 opt = opts.ipoptp_cur;
2499 if ((opts.ipoptp_flags & IPOPTP_ERROR) != 0) {
2500 break;
2501 }
2502 optlen = opts.ipoptp_len;
2503
2504 switch (optval) {
2505 case IPOPT_SSRR:
2506 case IPOPT_LSRR:
2507
2508 /*
2509 * Insert destination as the first entry in the source
2510 * route and move down the entries on step.
2511 * The last entry gets placed at buf1.
2512 */
2513 buf[IPOPT_OPTVAL] = optval;
2514 buf[IPOPT_OLEN] = optlen;
2515 buf[IPOPT_OFFSET] = optlen;
2516
2517 off = optlen - IP_ADDR_LEN;
2518 if (off < 0) {
2519 /* No entries in source route */
2520 break;
2521 }
2522 /* Last entry in source route if not already set */
2523 if (dst == INADDR_ANY)
2524 bcopy(opt + off, buf1, IP_ADDR_LEN);
2525 off -= IP_ADDR_LEN;
2526
2527 while (off > 0) {
2528 bcopy(opt + off,
2529 buf + off + IP_ADDR_LEN,
2530 IP_ADDR_LEN);
2531 off -= IP_ADDR_LEN;
2532 }
2533 /* ipha_dst into first slot */
2534 bcopy(&dst, buf + off + IP_ADDR_LEN,
2535 IP_ADDR_LEN);
2536 buf += optlen;
2537 len += optlen;
2538 break;
2539
2540 default:
2541 bcopy(opt, buf, optlen);
2542 buf += optlen;
2543 len += optlen;
2544 break;
2545 }
2546 }
2547 done:
2548 /* Pad the resulting options */
2549 while (len & 0x3) {
2550 *buf++ = IPOPT_EOL;
2551 len++;
2552 }
2553 return (len);
2554 }
2555
2556 /*
2557 * Update any record route or timestamp options to include this host.
2558 * Reverse any source route option.
2559 * This routine assumes that the options are well formed i.e. that they
2560 * have already been checked.
2561 */
2562 static void
2563 icmp_options_update(ipha_t *ipha)
2564 {
2565 ipoptp_t opts;
2566 uchar_t *opt;
2567 uint8_t optval;
2568 ipaddr_t src; /* Our local address */
2569 ipaddr_t dst;
2570
2571 ip2dbg(("icmp_options_update\n"));
2572 src = ipha->ipha_src;
2573 dst = ipha->ipha_dst;
2574
2575 for (optval = ipoptp_first(&opts, ipha);
2576 optval != IPOPT_EOL;
2577 optval = ipoptp_next(&opts)) {
2578 ASSERT((opts.ipoptp_flags & IPOPTP_ERROR) == 0);
2579 opt = opts.ipoptp_cur;
2580 ip2dbg(("icmp_options_update: opt %d, len %d\n",
2581 optval, opts.ipoptp_len));
2582 switch (optval) {
2583 int off1, off2;
2584 case IPOPT_SSRR:
2585 case IPOPT_LSRR:
2586 /*
2587 * Reverse the source route. The first entry
2588 * should be the next to last one in the current
2589 * source route (the last entry is our address).
2590 * The last entry should be the final destination.
2591 */
2592 off1 = IPOPT_MINOFF_SR - 1;
2593 off2 = opt[IPOPT_OFFSET] - IP_ADDR_LEN - 1;
2594 if (off2 < 0) {
2595 /* No entries in source route */
2596 ip1dbg((
2597 "icmp_options_update: bad src route\n"));
2598 break;
2599 }
2600 bcopy((char *)opt + off2, &dst, IP_ADDR_LEN);
2601 bcopy(&ipha->ipha_dst, (char *)opt + off2, IP_ADDR_LEN);
2602 bcopy(&dst, &ipha->ipha_dst, IP_ADDR_LEN);
2603 off2 -= IP_ADDR_LEN;
2604
2605 while (off1 < off2) {
2606 bcopy((char *)opt + off1, &src, IP_ADDR_LEN);
2607 bcopy((char *)opt + off2, (char *)opt + off1,
2608 IP_ADDR_LEN);
2609 bcopy(&src, (char *)opt + off2, IP_ADDR_LEN);
2610 off1 += IP_ADDR_LEN;
2611 off2 -= IP_ADDR_LEN;
2612 }
2613 opt[IPOPT_OFFSET] = IPOPT_MINOFF_SR;
2614 break;
2615 }
2616 }
2617 }
2618
2619 /*
2620 * Process received ICMP Redirect messages.
2621 * Assumes the caller has verified that the headers are in the pulled up mblk.
2622 * Consumes mp.
2623 */
2624 static void
2625 icmp_redirect_v4(mblk_t *mp, ipha_t *ipha, icmph_t *icmph, ip_recv_attr_t *ira)
2626 {
2627 ire_t *ire, *nire;
2628 ire_t *prev_ire;
2629 ipaddr_t src, dst, gateway;
2630 ip_stack_t *ipst = ira->ira_ill->ill_ipst;
2631 ipha_t *inner_ipha; /* Inner IP header */
2632
2633 /* Caller already pulled up everything. */
2634 inner_ipha = (ipha_t *)&icmph[1];
2635 src = ipha->ipha_src;
2636 dst = inner_ipha->ipha_dst;
2637 gateway = icmph->icmph_rd_gateway;
2638 /* Make sure the new gateway is reachable somehow. */
2639 ire = ire_ftable_lookup_v4(gateway, 0, 0, IRE_ONLINK, NULL,
2640 ALL_ZONES, NULL, MATCH_IRE_TYPE, 0, ipst, NULL);
2641 /*
2642 * Make sure we had a route for the dest in question and that
2643 * that route was pointing to the old gateway (the source of the
2644 * redirect packet.)
2645 * We do longest match and then compare ire_gateway_addr below.
2646 */
2647 prev_ire = ire_ftable_lookup_v4(dst, 0, 0, 0, NULL, ALL_ZONES,
2648 NULL, MATCH_IRE_DSTONLY, 0, ipst, NULL);
2649 /*
2650 * Check that
2651 * the redirect was not from ourselves
2652 * the new gateway and the old gateway are directly reachable
2653 */
2654 if (prev_ire == NULL || ire == NULL ||
2655 (prev_ire->ire_type & (IRE_LOCAL|IRE_LOOPBACK)) ||
2656 (prev_ire->ire_flags & (RTF_REJECT|RTF_BLACKHOLE)) ||
2657 !(ire->ire_type & IRE_IF_ALL) ||
2658 prev_ire->ire_gateway_addr != src) {
2659 BUMP_MIB(&ipst->ips_icmp_mib, icmpInBadRedirects);
2660 ip_drop_input("icmpInBadRedirects - ire", mp, ira->ira_ill);
2661 freemsg(mp);
2662 if (ire != NULL)
2663 ire_refrele(ire);
2664 if (prev_ire != NULL)
2665 ire_refrele(prev_ire);
2666 return;
2667 }
2668
2669 ire_refrele(prev_ire);
2670 ire_refrele(ire);
2671
2672 /*
2673 * TODO: more precise handling for cases 0, 2, 3, the latter two
2674 * require TOS routing
2675 */
2676 switch (icmph->icmph_code) {
2677 case 0:
2678 case 1:
2679 /* TODO: TOS specificity for cases 2 and 3 */
2680 case 2:
2681 case 3:
2682 break;
2683 default:
2684 BUMP_MIB(&ipst->ips_icmp_mib, icmpInBadRedirects);
2685 ip_drop_input("icmpInBadRedirects - code", mp, ira->ira_ill);
2686 freemsg(mp);
2687 return;
2688 }
2689 /*
2690 * Create a Route Association. This will allow us to remember that
2691 * someone we believe told us to use the particular gateway.
2692 */
2693 ire = ire_create(
2694 (uchar_t *)&dst, /* dest addr */
2695 (uchar_t *)&ip_g_all_ones, /* mask */
2696 (uchar_t *)&gateway, /* gateway addr */
2697 IRE_HOST,
2698 NULL, /* ill */
2699 ALL_ZONES,
2700 (RTF_DYNAMIC | RTF_GATEWAY | RTF_HOST),
2701 NULL, /* tsol_gc_t */
2702 ipst);
2703
2704 if (ire == NULL) {
2705 freemsg(mp);
2706 return;
2707 }
2708 nire = ire_add(ire);
2709 /* Check if it was a duplicate entry */
2710 if (nire != NULL && nire != ire) {
2711 ASSERT(nire->ire_identical_ref > 1);
2712 ire_delete(nire);
2713 ire_refrele(nire);
2714 nire = NULL;
2715 }
2716 ire = nire;
2717 if (ire != NULL) {
2718 ire_refrele(ire); /* Held in ire_add */
2719
2720 /* tell routing sockets that we received a redirect */
2721 ip_rts_change(RTM_REDIRECT, dst, gateway, IP_HOST_MASK, 0, src,
2722 (RTF_DYNAMIC | RTF_GATEWAY | RTF_HOST), 0,
2723 (RTA_DST | RTA_GATEWAY | RTA_NETMASK | RTA_AUTHOR), ipst);
2724 }
2725
2726 /*
2727 * Delete any existing IRE_HOST type redirect ires for this destination.
2728 * This together with the added IRE has the effect of
2729 * modifying an existing redirect.
2730 */
2731 prev_ire = ire_ftable_lookup_v4(dst, 0, src, IRE_HOST, NULL,
2732 ALL_ZONES, NULL, (MATCH_IRE_GW | MATCH_IRE_TYPE), 0, ipst, NULL);
2733 if (prev_ire != NULL) {
2734 if (prev_ire ->ire_flags & RTF_DYNAMIC)
2735 ire_delete(prev_ire);
2736 ire_refrele(prev_ire);
2737 }
2738
2739 freemsg(mp);
2740 }
2741
2742 /*
2743 * Generate an ICMP parameter problem message.
2744 * When called from ip_output side a minimal ip_recv_attr_t needs to be
2745 * constructed by the caller.
2746 */
2747 static void
2748 icmp_param_problem(mblk_t *mp, uint8_t ptr, ip_recv_attr_t *ira)
2749 {
2750 icmph_t icmph;
2751 ip_stack_t *ipst = ira->ira_ill->ill_ipst;
2752
2753 mp = icmp_pkt_err_ok(mp, ira);
2754 if (mp == NULL)
2755 return;
2756
2757 bzero(&icmph, sizeof (icmph_t));
2758 icmph.icmph_type = ICMP_PARAM_PROBLEM;
2759 icmph.icmph_pp_ptr = ptr;
2760 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutParmProbs);
2761 icmp_pkt(mp, &icmph, sizeof (icmph_t), ira);
2762 }
2763
2764 /*
2765 * Build and ship an IPv4 ICMP message using the packet data in mp, and
2766 * the ICMP header pointed to by "stuff". (May be called as writer.)
2767 * Note: assumes that icmp_pkt_err_ok has been called to verify that
2768 * an icmp error packet can be sent.
2769 * Assigns an appropriate source address to the packet. If ipha_dst is
2770 * one of our addresses use it for source. Otherwise let ip_output_simple
2771 * pick the source address.
2772 */
2773 static void
2774 icmp_pkt(mblk_t *mp, void *stuff, size_t len, ip_recv_attr_t *ira)
2775 {
2776 ipaddr_t dst;
2777 icmph_t *icmph;
2778 ipha_t *ipha;
2779 uint_t len_needed;
2780 size_t msg_len;
2781 mblk_t *mp1;
2782 ipaddr_t src;
2783 ire_t *ire;
2784 ip_xmit_attr_t ixas;
2785 ip_stack_t *ipst = ira->ira_ill->ill_ipst;
2786
2787 ipha = (ipha_t *)mp->b_rptr;
2788
2789 bzero(&ixas, sizeof (ixas));
2790 ixas.ixa_flags = IXAF_BASIC_SIMPLE_V4;
2791 ixas.ixa_zoneid = ira->ira_zoneid;
2792 ixas.ixa_ifindex = 0;
2793 ixas.ixa_ipst = ipst;
2794 ixas.ixa_cred = kcred;
2795 ixas.ixa_cpid = NOPID;
2796 ixas.ixa_tsl = ira->ira_tsl; /* Behave as a multi-level responder */
2797 ixas.ixa_multicast_ttl = IP_DEFAULT_MULTICAST_TTL;
2798
2799 if (ira->ira_flags & IRAF_IPSEC_SECURE) {
2800 /*
2801 * Apply IPsec based on how IPsec was applied to
2802 * the packet that had the error.
2803 *
2804 * If it was an outbound packet that caused the ICMP
2805 * error, then the caller will have setup the IRA
2806 * appropriately.
2807 */
2808 if (!ipsec_in_to_out(ira, &ixas, mp, ipha, NULL)) {
2809 BUMP_MIB(&ipst->ips_ip_mib, ipIfStatsOutDiscards);
2810 /* Note: mp already consumed and ip_drop_packet done */
2811 return;
2812 }
2813 } else {
2814 /*
2815 * This is in clear. The icmp message we are building
2816 * here should go out in clear, independent of our policy.
2817 */
2818 ixas.ixa_flags |= IXAF_NO_IPSEC;
2819 }
2820
2821 /* Remember our eventual destination */
2822 dst = ipha->ipha_src;
2823
2824 /*
2825 * If the packet was for one of our unicast addresses, make
2826 * sure we respond with that as the source. Otherwise
2827 * have ip_output_simple pick the source address.
2828 */
2829 ire = ire_ftable_lookup_v4(ipha->ipha_dst, 0, 0,
2830 (IRE_LOCAL|IRE_LOOPBACK), NULL, ira->ira_zoneid, NULL,
2831 MATCH_IRE_TYPE|MATCH_IRE_ZONEONLY, 0, ipst, NULL);
2832 if (ire != NULL) {
2833 ire_refrele(ire);
2834 src = ipha->ipha_dst;
2835 } else {
2836 src = INADDR_ANY;
2837 ixas.ixa_flags |= IXAF_SET_SOURCE;
2838 }
2839
2840 /*
2841 * Check if we can send back more then 8 bytes in addition to
2842 * the IP header. We try to send 64 bytes of data and the internal
2843 * header in the special cases of ipv4 encapsulated ipv4 or ipv6.
2844 */
2845 len_needed = IPH_HDR_LENGTH(ipha);
2846 if (ipha->ipha_protocol == IPPROTO_ENCAP ||
2847 ipha->ipha_protocol == IPPROTO_IPV6) {
2848 if (!pullupmsg(mp, -1)) {
2849 BUMP_MIB(&ipst->ips_ip_mib, ipIfStatsOutDiscards);
2850 ip_drop_output("ipIfStatsOutDiscards", mp, NULL);
2851 freemsg(mp);
2852 return;
2853 }
2854 ipha = (ipha_t *)mp->b_rptr;
2855
2856 if (ipha->ipha_protocol == IPPROTO_ENCAP) {
2857 len_needed += IPH_HDR_LENGTH(((uchar_t *)ipha +
2858 len_needed));
2859 } else {
2860 ip6_t *ip6h = (ip6_t *)((uchar_t *)ipha + len_needed);
2861
2862 ASSERT(ipha->ipha_protocol == IPPROTO_IPV6);
2863 len_needed += ip_hdr_length_v6(mp, ip6h);
2864 }
2865 }
2866 len_needed += ipst->ips_ip_icmp_return;
2867 msg_len = msgdsize(mp);
2868 if (msg_len > len_needed) {
2869 (void) adjmsg(mp, len_needed - msg_len);
2870 msg_len = len_needed;
2871 }
2872 mp1 = allocb(sizeof (icmp_ipha) + len, BPRI_MED);
2873 if (mp1 == NULL) {
2874 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutErrors);
2875 freemsg(mp);
2876 return;
2877 }
2878 mp1->b_cont = mp;
2879 mp = mp1;
2880
2881 /*
2882 * Set IXAF_TRUSTED_ICMP so we can let the ICMP messages this
2883 * node generates be accepted in peace by all on-host destinations.
2884 * If we do NOT assume that all on-host destinations trust
2885 * self-generated ICMP messages, then rework here, ip6.c, and spd.c.
2886 * (Look for IXAF_TRUSTED_ICMP).
2887 */
2888 ixas.ixa_flags |= IXAF_TRUSTED_ICMP;
2889
2890 ipha = (ipha_t *)mp->b_rptr;
2891 mp1->b_wptr = (uchar_t *)ipha + (sizeof (icmp_ipha) + len);
2892 *ipha = icmp_ipha;
2893 ipha->ipha_src = src;
2894 ipha->ipha_dst = dst;
2895 ipha->ipha_ttl = ipst->ips_ip_def_ttl;
2896 msg_len += sizeof (icmp_ipha) + len;
2897 if (msg_len > IP_MAXPACKET) {
2898 (void) adjmsg(mp, IP_MAXPACKET - msg_len);
2899 msg_len = IP_MAXPACKET;
2900 }
2901 ipha->ipha_length = htons((uint16_t)msg_len);
2902 icmph = (icmph_t *)&ipha[1];
2903 bcopy(stuff, icmph, len);
2904 icmph->icmph_checksum = 0;
2905 icmph->icmph_checksum = IP_CSUM(mp, (int32_t)sizeof (ipha_t), 0);
2906 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutMsgs);
2907
2908 (void) ip_output_simple(mp, &ixas);
2909 ixa_cleanup(&ixas);
2910 }
2911
2912 /*
2913 * Determine if an ICMP error packet can be sent given the rate limit.
2914 * The limit consists of an average frequency (icmp_pkt_err_interval measured
2915 * in milliseconds) and a burst size. Burst size number of packets can
2916 * be sent arbitrarely closely spaced.
2917 * The state is tracked using two variables to implement an approximate
2918 * token bucket filter:
2919 * icmp_pkt_err_last - lbolt value when the last burst started
2920 * icmp_pkt_err_sent - number of packets sent in current burst
2921 */
2922 boolean_t
2923 icmp_err_rate_limit(ip_stack_t *ipst)
2924 {
2925 clock_t now = TICK_TO_MSEC(ddi_get_lbolt());
2926 uint_t refilled; /* Number of packets refilled in tbf since last */
2927 /* Guard against changes by loading into local variable */
2928 uint_t err_interval = ipst->ips_ip_icmp_err_interval;
2929
2930 if (err_interval == 0)
2931 return (B_FALSE);
2932
2933 if (ipst->ips_icmp_pkt_err_last > now) {
2934 /* 100HZ lbolt in ms for 32bit arch wraps every 49.7 days */
2935 ipst->ips_icmp_pkt_err_last = 0;
2936 ipst->ips_icmp_pkt_err_sent = 0;
2937 }
2938 /*
2939 * If we are in a burst update the token bucket filter.
2940 * Update the "last" time to be close to "now" but make sure
2941 * we don't loose precision.
2942 */
2943 if (ipst->ips_icmp_pkt_err_sent != 0) {
2944 refilled = (now - ipst->ips_icmp_pkt_err_last)/err_interval;
2945 if (refilled > ipst->ips_icmp_pkt_err_sent) {
2946 ipst->ips_icmp_pkt_err_sent = 0;
2947 } else {
2948 ipst->ips_icmp_pkt_err_sent -= refilled;
2949 ipst->ips_icmp_pkt_err_last += refilled * err_interval;
2950 }
2951 }
2952 if (ipst->ips_icmp_pkt_err_sent == 0) {
2953 /* Start of new burst */
2954 ipst->ips_icmp_pkt_err_last = now;
2955 }
2956 if (ipst->ips_icmp_pkt_err_sent < ipst->ips_ip_icmp_err_burst) {
2957 ipst->ips_icmp_pkt_err_sent++;
2958 ip1dbg(("icmp_err_rate_limit: %d sent in burst\n",
2959 ipst->ips_icmp_pkt_err_sent));
2960 return (B_FALSE);
2961 }
2962 ip1dbg(("icmp_err_rate_limit: dropped\n"));
2963 return (B_TRUE);
2964 }
2965
2966 /*
2967 * Check if it is ok to send an IPv4 ICMP error packet in
2968 * response to the IPv4 packet in mp.
2969 * Free the message and return null if no
2970 * ICMP error packet should be sent.
2971 */
2972 static mblk_t *
2973 icmp_pkt_err_ok(mblk_t *mp, ip_recv_attr_t *ira)
2974 {
2975 ip_stack_t *ipst = ira->ira_ill->ill_ipst;
2976 icmph_t *icmph;
2977 ipha_t *ipha;
2978 uint_t len_needed;
2979
2980 if (!mp)
2981 return (NULL);
2982 ipha = (ipha_t *)mp->b_rptr;
2983 if (ip_csum_hdr(ipha)) {
2984 BUMP_MIB(&ipst->ips_ip_mib, ipIfStatsInCksumErrs);
2985 ip_drop_input("ipIfStatsInCksumErrs", mp, NULL);
2986 freemsg(mp);
2987 return (NULL);
2988 }
2989 if (ip_type_v4(ipha->ipha_dst, ipst) == IRE_BROADCAST ||
2990 ip_type_v4(ipha->ipha_src, ipst) == IRE_BROADCAST ||
2991 CLASSD(ipha->ipha_dst) ||
2992 CLASSD(ipha->ipha_src) ||
2993 (ntohs(ipha->ipha_fragment_offset_and_flags) & IPH_OFFSET)) {
2994 /* Note: only errors to the fragment with offset 0 */
2995 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutDrops);
2996 freemsg(mp);
2997 return (NULL);
2998 }
2999 if (ipha->ipha_protocol == IPPROTO_ICMP) {
3000 /*
3001 * Check the ICMP type. RFC 1122 sez: don't send ICMP
3002 * errors in response to any ICMP errors.
3003 */
3004 len_needed = IPH_HDR_LENGTH(ipha) + ICMPH_SIZE;
3005 if (mp->b_wptr - mp->b_rptr < len_needed) {
3006 if (!pullupmsg(mp, len_needed)) {
3007 BUMP_MIB(&ipst->ips_icmp_mib, icmpInErrors);
3008 freemsg(mp);
3009 return (NULL);
3010 }
3011 ipha = (ipha_t *)mp->b_rptr;
3012 }
3013 icmph = (icmph_t *)
3014 (&((char *)ipha)[IPH_HDR_LENGTH(ipha)]);
3015 switch (icmph->icmph_type) {
3016 case ICMP_DEST_UNREACHABLE:
3017 case ICMP_SOURCE_QUENCH:
3018 case ICMP_TIME_EXCEEDED:
3019 case ICMP_PARAM_PROBLEM:
3020 case ICMP_REDIRECT:
3021 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutDrops);
3022 freemsg(mp);
3023 return (NULL);
3024 default:
3025 break;
3026 }
3027 }
3028 /*
3029 * If this is a labeled system, then check to see if we're allowed to
3030 * send a response to this particular sender. If not, then just drop.
3031 */
3032 if (is_system_labeled() && !tsol_can_reply_error(mp, ira)) {
3033 ip2dbg(("icmp_pkt_err_ok: can't respond to packet\n"));
3034 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutDrops);
3035 freemsg(mp);
3036 return (NULL);
3037 }
3038 if (icmp_err_rate_limit(ipst)) {
3039 /*
3040 * Only send ICMP error packets every so often.
3041 * This should be done on a per port/source basis,
3042 * but for now this will suffice.
3043 */
3044 freemsg(mp);
3045 return (NULL);
3046 }
3047 return (mp);
3048 }
3049
3050 /*
3051 * Called when a packet was sent out the same link that it arrived on.
3052 * Check if it is ok to send a redirect and then send it.
3053 */
3054 void
3055 ip_send_potential_redirect_v4(mblk_t *mp, ipha_t *ipha, ire_t *ire,
3056 ip_recv_attr_t *ira)
3057 {
3058 ip_stack_t *ipst = ira->ira_ill->ill_ipst;
3059 ipaddr_t src, nhop;
3060 mblk_t *mp1;
3061 ire_t *nhop_ire;
3062
3063 /*
3064 * Check the source address to see if it originated
3065 * on the same logical subnet it is going back out on.
3066 * If so, we should be able to send it a redirect.
3067 * Avoid sending a redirect if the destination
3068 * is directly connected (i.e., we matched an IRE_ONLINK),
3069 * or if the packet was source routed out this interface.
3070 *
3071 * We avoid sending a redirect if the
3072 * destination is directly connected
3073 * because it is possible that multiple
3074 * IP subnets may have been configured on
3075 * the link, and the source may not
3076 * be on the same subnet as ip destination,
3077 * even though they are on the same
3078 * physical link.
3079 */
3080 if ((ire->ire_type & IRE_ONLINK) ||
3081 ip_source_routed(ipha, ipst))
3082 return;
3083
3084 nhop_ire = ire_nexthop(ire);
3085 if (nhop_ire == NULL)
3086 return;
3087
3088 nhop = nhop_ire->ire_addr;
3089
3090 if (nhop_ire->ire_type & IRE_IF_CLONE) {
3091 ire_t *ire2;
3092
3093 /* Follow ire_dep_parent to find non-clone IRE_INTERFACE */
3094 mutex_enter(&nhop_ire->ire_lock);
3095 ire2 = nhop_ire->ire_dep_parent;
3096 if (ire2 != NULL)
3097 ire_refhold(ire2);
3098 mutex_exit(&nhop_ire->ire_lock);
3099 ire_refrele(nhop_ire);
3100 nhop_ire = ire2;
3101 }
3102 if (nhop_ire == NULL)
3103 return;
3104
3105 ASSERT(!(nhop_ire->ire_type & IRE_IF_CLONE));
3106
3107 src = ipha->ipha_src;
3108
3109 /*
3110 * We look at the interface ire for the nexthop,
3111 * to see if ipha_src is in the same subnet
3112 * as the nexthop.
3113 */
3114 if ((src & nhop_ire->ire_mask) == (nhop & nhop_ire->ire_mask)) {
3115 /*
3116 * The source is directly connected.
3117 */
3118 mp1 = copymsg(mp);
3119 if (mp1 != NULL) {
3120 icmp_send_redirect(mp1, nhop, ira);
3121 }
3122 }
3123 ire_refrele(nhop_ire);
3124 }
3125
3126 /*
3127 * Generate an ICMP redirect message.
3128 */
3129 static void
3130 icmp_send_redirect(mblk_t *mp, ipaddr_t gateway, ip_recv_attr_t *ira)
3131 {
3132 icmph_t icmph;
3133 ip_stack_t *ipst = ira->ira_ill->ill_ipst;
3134
3135 mp = icmp_pkt_err_ok(mp, ira);
3136 if (mp == NULL)
3137 return;
3138
3139 bzero(&icmph, sizeof (icmph_t));
3140 icmph.icmph_type = ICMP_REDIRECT;
3141 icmph.icmph_code = 1;
3142 icmph.icmph_rd_gateway = gateway;
3143 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutRedirects);
3144 icmp_pkt(mp, &icmph, sizeof (icmph_t), ira);
3145 }
3146
3147 /*
3148 * Generate an ICMP time exceeded message.
3149 */
3150 void
3151 icmp_time_exceeded(mblk_t *mp, uint8_t code, ip_recv_attr_t *ira)
3152 {
3153 icmph_t icmph;
3154 ip_stack_t *ipst = ira->ira_ill->ill_ipst;
3155
3156 mp = icmp_pkt_err_ok(mp, ira);
3157 if (mp == NULL)
3158 return;
3159
3160 bzero(&icmph, sizeof (icmph_t));
3161 icmph.icmph_type = ICMP_TIME_EXCEEDED;
3162 icmph.icmph_code = code;
3163 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutTimeExcds);
3164 icmp_pkt(mp, &icmph, sizeof (icmph_t), ira);
3165 }
3166
3167 /*
3168 * Generate an ICMP unreachable message.
3169 * When called from ip_output side a minimal ip_recv_attr_t needs to be
3170 * constructed by the caller.
3171 */
3172 void
3173 icmp_unreachable(mblk_t *mp, uint8_t code, ip_recv_attr_t *ira)
3174 {
3175 icmph_t icmph;
3176 ip_stack_t *ipst = ira->ira_ill->ill_ipst;
3177
3178 mp = icmp_pkt_err_ok(mp, ira);
3179 if (mp == NULL)
3180 return;
3181
3182 bzero(&icmph, sizeof (icmph_t));
3183 icmph.icmph_type = ICMP_DEST_UNREACHABLE;
3184 icmph.icmph_code = code;
3185 BUMP_MIB(&ipst->ips_icmp_mib, icmpOutDestUnreachs);
3186 icmp_pkt(mp, &icmph, sizeof (icmph_t), ira);
3187 }
3188
3189 /*
3190 * Latch in the IPsec state for a stream based the policy in the listener
3191 * and the actions in the ip_recv_attr_t.
3192 * Called directly from TCP and SCTP.
3193 */
3194 boolean_t
3195 ip_ipsec_policy_inherit(conn_t *connp, conn_t *lconnp, ip_recv_attr_t *ira)
3196 {
3197 ASSERT(lconnp->conn_policy != NULL);
3198 ASSERT(connp->conn_policy == NULL);
3199
3200 IPPH_REFHOLD(lconnp->conn_policy);
3201 connp->conn_policy = lconnp->conn_policy;
3202
3203 if (ira->ira_ipsec_action != NULL) {
3204 if (connp->conn_latch == NULL) {
3205 connp->conn_latch = iplatch_create();
3206 if (connp->conn_latch == NULL)
3207 return (B_FALSE);
3208 }
3209 ipsec_latch_inbound(connp, ira);
3210 }
3211 return (B_TRUE);
3212 }
3213
3214 /*
3215 * Verify whether or not the IP address is a valid local address.
3216 * Could be a unicast, including one for a down interface.
3217 * If allow_mcbc then a multicast or broadcast address is also
3218 * acceptable.
3219 *
3220 * In the case of a broadcast/multicast address, however, the
3221 * upper protocol is expected to reset the src address
3222 * to zero when we return IPVL_MCAST/IPVL_BCAST so that
3223 * no packets are emitted with broadcast/multicast address as
3224 * source address (that violates hosts requirements RFC 1122)
3225 * The addresses valid for bind are:
3226 * (1) - INADDR_ANY (0)
3227 * (2) - IP address of an UP interface
3228 * (3) - IP address of a DOWN interface
3229 * (4) - valid local IP broadcast addresses. In this case
3230 * the conn will only receive packets destined to
3231 * the specified broadcast address.
3232 * (5) - a multicast address. In this case
3233 * the conn will only receive packets destined to
3234 * the specified multicast address. Note: the
3235 * application still has to issue an
3236 * IP_ADD_MEMBERSHIP socket option.
3237 *
3238 * In all the above cases, the bound address must be valid in the current zone.
3239 * When the address is loopback, multicast or broadcast, there might be many
3240 * matching IREs so bind has to look up based on the zone.
3241 */
3242 ip_laddr_t
3243 ip_laddr_verify_v4(ipaddr_t src_addr, zoneid_t zoneid,
3244 ip_stack_t *ipst, boolean_t allow_mcbc)
3245 {
3246 ire_t *src_ire;
3247
3248 ASSERT(src_addr != INADDR_ANY);
3249
3250 src_ire = ire_ftable_lookup_v4(src_addr, 0, 0, 0,
3251 NULL, zoneid, NULL, MATCH_IRE_ZONEONLY, 0, ipst, NULL);
3252
3253 /*
3254 * If an address other than in6addr_any is requested,
3255 * we verify that it is a valid address for bind
3256 * Note: Following code is in if-else-if form for
3257 * readability compared to a condition check.
3258 */
3259 if (src_ire != NULL && (src_ire->ire_type & (IRE_LOCAL|IRE_LOOPBACK))) {
3260 /*
3261 * (2) Bind to address of local UP interface
3262 */
3263 ire_refrele(src_ire);
3264 return (IPVL_UNICAST_UP);
3265 } else if (src_ire != NULL && src_ire->ire_type & IRE_BROADCAST) {
3266 /*
3267 * (4) Bind to broadcast address
3268 */
3269 ire_refrele(src_ire);
3270 if (allow_mcbc)
3271 return (IPVL_BCAST);
3272 else
3273 return (IPVL_BAD);
3274 } else if (CLASSD(src_addr)) {
3275 /* (5) bind to multicast address. */
3276 if (src_ire != NULL)
3277 ire_refrele(src_ire);
3278
3279 if (allow_mcbc)
3280 return (IPVL_MCAST);
3281 else
3282 return (IPVL_BAD);
3283 } else {
3284 ipif_t *ipif;
3285
3286 /*
3287 * (3) Bind to address of local DOWN interface?
3288 * (ipif_lookup_addr() looks up all interfaces
3289 * but we do not get here for UP interfaces
3290 * - case (2) above)
3291 */
3292 if (src_ire != NULL)
3293 ire_refrele(src_ire);
3294
3295 ipif = ipif_lookup_addr(src_addr, NULL, zoneid, ipst);
3296 if (ipif == NULL)
3297 return (IPVL_BAD);
3298
3299 /* Not a useful source? */
3300 if (ipif->ipif_flags & (IPIF_NOLOCAL | IPIF_ANYCAST)) {
3301 ipif_refrele(ipif);
3302 return (IPVL_BAD);
3303 }
3304 ipif_refrele(ipif);
3305 return (IPVL_UNICAST_DOWN);
3306 }
3307 }
3308
3309 /*
3310 * Insert in the bind fanout for IPv4 and IPv6.
3311 * The caller should already have used ip_laddr_verify_v*() before calling
3312 * this.
3313 */
3314 int
3315 ip_laddr_fanout_insert(conn_t *connp)
3316 {
3317 int error;
3318
3319 /*
3320 * Allow setting new policies. For example, disconnects result
3321 * in us being called. As we would have set conn_policy_cached
3322 * to B_TRUE before, we should set it to B_FALSE, so that policy
3323 * can change after the disconnect.
3324 */
3325 connp->conn_policy_cached = B_FALSE;
3326
3327 error = ipcl_bind_insert(connp);
3328 if (error != 0) {
3329 if (connp->conn_anon_port) {
3330 (void) tsol_mlp_anon(crgetzone(connp->conn_cred),
3331 connp->conn_mlp_type, connp->conn_proto,
3332 ntohs(connp->conn_lport), B_FALSE);
3333 }
3334 connp->conn_mlp_type = mlptSingle;
3335 }
3336 return (error);
3337 }
3338
3339 /*
3340 * Verify that both the source and destination addresses are valid. If
3341 * IPDF_VERIFY_DST is not set, then the destination address may be unreachable,
3342 * i.e. have no route to it. Protocols like TCP want to verify destination
3343 * reachability, while tunnels do not.
3344 *
3345 * Determine the route, the interface, and (optionally) the source address
3346 * to use to reach a given destination.
3347 * Note that we allow connect to broadcast and multicast addresses when
3348 * IPDF_ALLOW_MCBC is set.
3349 * first_hop and dst_addr are normally the same, but if source routing
3350 * they will differ; in that case the first_hop is what we'll use for the
3351 * routing lookup but the dce and label checks will be done on dst_addr,
3352 *
3353 * If uinfo is set, then we fill in the best available information
3354 * we have for the destination. This is based on (in priority order) any
3355 * metrics and path MTU stored in a dce_t, route metrics, and finally the
3356 * ill_mtu/ill_mc_mtu.
3357 *
3358 * Tsol note: If we have a source route then dst_addr != firsthop. But we
3359 * always do the label check on dst_addr.
3360 */
3361 int
3362 ip_set_destination_v4(ipaddr_t *src_addrp, ipaddr_t dst_addr, ipaddr_t firsthop,
3363 ip_xmit_attr_t *ixa, iulp_t *uinfo, uint32_t flags, uint_t mac_mode)
3364 {
3365 ire_t *ire = NULL;
3366 int error = 0;
3367 ipaddr_t setsrc; /* RTF_SETSRC */
3368 zoneid_t zoneid = ixa->ixa_zoneid; /* Honors SO_ALLZONES */
3369 ip_stack_t *ipst = ixa->ixa_ipst;
3370 dce_t *dce;
3371 uint_t pmtu;
3372 uint_t generation;
3373 nce_t *nce;
3374 ill_t *ill = NULL;
3375 boolean_t multirt = B_FALSE;
3376
3377 ASSERT(ixa->ixa_flags & IXAF_IS_IPV4);
3378
3379 /*
3380 * We never send to zero; the ULPs map it to the loopback address.
3381 * We can't allow it since we use zero to mean unitialized in some
3382 * places.
3383 */
3384 ASSERT(dst_addr != INADDR_ANY);
3385
3386 if (is_system_labeled()) {
3387 ts_label_t *tsl = NULL;
3388
3389 error = tsol_check_dest(ixa->ixa_tsl, &dst_addr, IPV4_VERSION,
3390 mac_mode, (flags & IPDF_ZONE_IS_GLOBAL) != 0, &tsl);
3391 if (error != 0)
3392 return (error);
3393 if (tsl != NULL) {
3394 /* Update the label */
3395 ip_xmit_attr_replace_tsl(ixa, tsl);
3396 }
3397 }
3398
3399 setsrc = INADDR_ANY;
3400 /*
3401 * Select a route; For IPMP interfaces, we would only select
3402 * a "hidden" route (i.e., going through a specific under_ill)
3403 * if ixa_ifindex has been specified.
3404 */
3405 ire = ip_select_route_v4(firsthop, *src_addrp, ixa,
3406 &generation, &setsrc, &error, &multirt);
3407 ASSERT(ire != NULL); /* IRE_NOROUTE if none found */
3408 if (error != 0)
3409 goto bad_addr;
3410
3411 /*
3412 * ire can't be a broadcast or multicast unless IPDF_ALLOW_MCBC is set.
3413 * If IPDF_VERIFY_DST is set, the destination must be reachable;
3414 * Otherwise the destination needn't be reachable.
3415 *
3416 * If we match on a reject or black hole, then we've got a
3417 * local failure. May as well fail out the connect() attempt,
3418 * since it's never going to succeed.
3419 */
3420 if (ire->ire_flags & (RTF_REJECT|RTF_BLACKHOLE)) {
3421 /*
3422 * If we're verifying destination reachability, we always want
3423 * to complain here.
3424 *
3425 * If we're not verifying destination reachability but the
3426 * destination has a route, we still want to fail on the
3427 * temporary address and broadcast address tests.
3428 *
3429 * In both cases do we let the code continue so some reasonable
3430 * information is returned to the caller. That enables the
3431 * caller to use (and even cache) the IRE. conn_ip_ouput will
3432 * use the generation mismatch path to check for the unreachable
3433 * case thereby avoiding any specific check in the main path.
3434 */
3435 ASSERT(generation == IRE_GENERATION_VERIFY);
3436 if (flags & IPDF_VERIFY_DST) {
3437 /*
3438 * Set errno but continue to set up ixa_ire to be
3439 * the RTF_REJECT|RTF_BLACKHOLE IRE.
3440 * That allows callers to use ip_output to get an
3441 * ICMP error back.
3442 */
3443 if (!(ire->ire_type & IRE_HOST))
3444 error = ENETUNREACH;
3445 else
3446 error = EHOSTUNREACH;
3447 }
3448 }
3449
3450 if ((ire->ire_type & (IRE_BROADCAST|IRE_MULTICAST)) &&
3451 !(flags & IPDF_ALLOW_MCBC)) {
3452 ire_refrele(ire);
3453 ire = ire_reject(ipst, B_FALSE);
3454 generation = IRE_GENERATION_VERIFY;
3455 error = ENETUNREACH;
3456 }
3457
3458 /* Cache things */
3459 if (ixa->ixa_ire != NULL)
3460 ire_refrele_notr(ixa->ixa_ire);
3461 #ifdef DEBUG
3462 ire_refhold_notr(ire);
3463 ire_refrele(ire);
3464 #endif
3465 ixa->ixa_ire = ire;
3466 ixa->ixa_ire_generation = generation;
3467
3468 /*
3469 * Ensure that ixa_dce is always set any time that ixa_ire is set,
3470 * since some callers will send a packet to conn_ip_output() even if
3471 * there's an error.
3472 */
3473 if (flags & IPDF_UNIQUE_DCE) {
3474 /* Fallback to the default dce if allocation fails */
3475 dce = dce_lookup_and_add_v4(dst_addr, ipst);
3476 if (dce != NULL)
3477 generation = dce->dce_generation;
3478 else
3479 dce = dce_lookup_v4(dst_addr, ipst, &generation);
3480 } else {
3481 dce = dce_lookup_v4(dst_addr, ipst, &generation);
3482 }
3483 ASSERT(dce != NULL);
3484 if (ixa->ixa_dce != NULL)
3485 dce_refrele_notr(ixa->ixa_dce);
3486 #ifdef DEBUG
3487 dce_refhold_notr(dce);
3488 dce_refrele(dce);
3489 #endif
3490 ixa->ixa_dce = dce;
3491 ixa->ixa_dce_generation = generation;
3492
3493 /*
3494 * For multicast with multirt we have a flag passed back from
3495 * ire_lookup_multi_ill_v4 since we don't have an IRE for each
3496 * possible multicast address.
3497 * We also need a flag for multicast since we can't check
3498 * whether RTF_MULTIRT is set in ixa_ire for multicast.
3499 */
3500 if (multirt) {
3501 ixa->ixa_postfragfn = ip_postfrag_multirt_v4;
3502 ixa->ixa_flags |= IXAF_MULTIRT_MULTICAST;
3503 } else {
3504 ixa->ixa_postfragfn = ire->ire_postfragfn;
3505 ixa->ixa_flags &= ~IXAF_MULTIRT_MULTICAST;
3506 }
3507 if (!(ire->ire_flags & (RTF_REJECT|RTF_BLACKHOLE))) {
3508 /* Get an nce to cache. */
3509 nce = ire_to_nce(ire, firsthop, NULL);
3510 if (nce == NULL) {
3511 /* Allocation failure? */
3512 ixa->ixa_ire_generation = IRE_GENERATION_VERIFY;
3513 } else {
3514 if (ixa->ixa_nce != NULL)
3515 nce_refrele(ixa->ixa_nce);
3516 ixa->ixa_nce = nce;
3517 }
3518 }
3519
3520 /*
3521 * If the source address is a loopback address, the
3522 * destination had best be local or multicast.
3523 * If we are sending to an IRE_LOCAL using a loopback source then
3524 * it had better be the same zoneid.
3525 */
3526 if (*src_addrp == htonl(INADDR_LOOPBACK)) {
3527 if ((ire->ire_type & IRE_LOCAL) && ire->ire_zoneid != zoneid) {
3528 ire = NULL; /* Stored in ixa_ire */
3529 error = EADDRNOTAVAIL;
3530 goto bad_addr;
3531 }
3532 if (!(ire->ire_type & (IRE_LOOPBACK|IRE_LOCAL|IRE_MULTICAST))) {
3533 ire = NULL; /* Stored in ixa_ire */
3534 error = EADDRNOTAVAIL;
3535 goto bad_addr;
3536 }
3537 }
3538 if (ire->ire_type & IRE_BROADCAST) {
3539 /*
3540 * If the ULP didn't have a specified source, then we
3541 * make sure we reselect the source when sending
3542 * broadcasts out different interfaces.
3543 */
3544 if (flags & IPDF_SELECT_SRC)
3545 ixa->ixa_flags |= IXAF_SET_SOURCE;
3546 else
3547 ixa->ixa_flags &= ~IXAF_SET_SOURCE;
3548 }
3549
3550 /*
3551 * Does the caller want us to pick a source address?
3552 */
3553 if (flags & IPDF_SELECT_SRC) {
3554 ipaddr_t src_addr;
3555
3556 /*
3557 * We use use ire_nexthop_ill to avoid the under ipmp
3558 * interface for source address selection. Note that for ipmp
3559 * probe packets, ixa_ifindex would have been specified, and
3560 * the ip_select_route() invocation would have picked an ire
3561 * will ire_ill pointing at an under interface.
3562 */
3563 ill = ire_nexthop_ill(ire);
3564
3565 /* If unreachable we have no ill but need some source */
3566 if (ill == NULL) {
3567 src_addr = htonl(INADDR_LOOPBACK);
3568 /* Make sure we look for a better source address */
3569 generation = SRC_GENERATION_VERIFY;
3570 } else {
3571 error = ip_select_source_v4(ill, setsrc, dst_addr,
3572 ixa->ixa_multicast_ifaddr, zoneid,
3573 ipst, &src_addr, &generation, NULL);
3574 if (error != 0) {
3575 ire = NULL; /* Stored in ixa_ire */
3576 goto bad_addr;
3577 }
3578 }
3579
3580 /*
3581 * We allow the source address to to down.
3582 * However, we check that we don't use the loopback address
3583 * as a source when sending out on the wire.
3584 */
3585 if ((src_addr == htonl(INADDR_LOOPBACK)) &&
3586 !(ire->ire_type & (IRE_LOCAL|IRE_LOOPBACK|IRE_MULTICAST)) &&
3587 !(ire->ire_flags & (RTF_REJECT|RTF_BLACKHOLE))) {
3588 ire = NULL; /* Stored in ixa_ire */
3589 error = EADDRNOTAVAIL;
3590 goto bad_addr;
3591 }
3592
3593 *src_addrp = src_addr;
3594 ixa->ixa_src_generation = generation;
3595 }
3596
3597 /*
3598 * Make sure we don't leave an unreachable ixa_nce in place
3599 * since ip_select_route is used when we unplumb i.e., remove
3600 * references on ixa_ire, ixa_nce, and ixa_dce.
3601 */
3602 nce = ixa->ixa_nce;
3603 if (nce != NULL && nce->nce_is_condemned) {
3604 nce_refrele(nce);
3605 ixa->ixa_nce = NULL;
3606 ixa->ixa_ire_generation = IRE_GENERATION_VERIFY;
3607 }
3608
3609 /*
3610 * The caller has set IXAF_PMTU_DISCOVERY if path MTU is desired.
3611 * However, we can't do it for IPv4 multicast or broadcast.
3612 */
3613 if (ire->ire_type & (IRE_BROADCAST|IRE_MULTICAST))
3614 ixa->ixa_flags &= ~IXAF_PMTU_DISCOVERY;
3615
3616 /*
3617 * Set initial value for fragmentation limit. Either conn_ip_output
3618 * or ULP might updates it when there are routing changes.
3619 * Handles a NULL ixa_ire->ire_ill or a NULL ixa_nce for RTF_REJECT.
3620 */
3621 pmtu = ip_get_pmtu(ixa);
3622 ixa->ixa_fragsize = pmtu;
3623 /* Make sure ixa_fragsize and ixa_pmtu remain identical */
3624 if (ixa->ixa_flags & IXAF_VERIFY_PMTU)
3625 ixa->ixa_pmtu = pmtu;
3626
3627 /*
3628 * Extract information useful for some transports.
3629 * First we look for DCE metrics. Then we take what we have in
3630 * the metrics in the route, where the offlink is used if we have
3631 * one.
3632 */
3633 if (uinfo != NULL) {
3634 bzero(uinfo, sizeof (*uinfo));
3635
3636 if (dce->dce_flags & DCEF_UINFO)
3637 *uinfo = dce->dce_uinfo;
3638
3639 rts_merge_metrics(uinfo, &ire->ire_metrics);
3640
3641 /* Allow ire_metrics to decrease the path MTU from above */
3642 if (uinfo->iulp_mtu == 0 || uinfo->iulp_mtu > pmtu)
3643 uinfo->iulp_mtu = pmtu;
3644
3645 uinfo->iulp_localnet = (ire->ire_type & IRE_ONLINK) != 0;
3646 uinfo->iulp_loopback = (ire->ire_type & IRE_LOOPBACK) != 0;
3647 uinfo->iulp_local = (ire->ire_type & IRE_LOCAL) != 0;
3648 }
3649
3650 if (ill != NULL)
3651 ill_refrele(ill);
3652
3653 return (error);
3654
3655 bad_addr:
3656 if (ire != NULL)
3657 ire_refrele(ire);
3658
3659 if (ill != NULL)
3660 ill_refrele(ill);
3661
3662 /*
3663 * Make sure we don't leave an unreachable ixa_nce in place
3664 * since ip_select_route is used when we unplumb i.e., remove
3665 * references on ixa_ire, ixa_nce, and ixa_dce.
3666 */
3667 nce = ixa->ixa_nce;
3668 if (nce != NULL && nce->nce_is_condemned) {
3669 nce_refrele(nce);
3670 ixa->ixa_nce = NULL;
3671 ixa->ixa_ire_generation = IRE_GENERATION_VERIFY;
3672 }
3673
3674 return (error);
3675 }
3676
3677
3678 /*
3679 * Get the base MTU for the case when path MTU discovery is not used.
3680 * Takes the MTU of the IRE into account.
3681 */
3682 uint_t
3683 ip_get_base_mtu(ill_t *ill, ire_t *ire)
3684 {
3685 uint_t mtu;
3686 uint_t iremtu = ire->ire_metrics.iulp_mtu;
3687
3688 if (ire->ire_type & (IRE_MULTICAST|IRE_BROADCAST))
3689 mtu = ill->ill_mc_mtu;
3690 else
3691 mtu = ill->ill_mtu;
3692
3693 if (iremtu != 0 && iremtu < mtu)
3694 mtu = iremtu;
3695
3696 return (mtu);
3697 }
3698
3699 /*
3700 * Get the PMTU for the attributes. Handles both IPv4 and IPv6.
3701 * Assumes that ixa_ire, dce, and nce have already been set up.
3702 *
3703 * The caller has set IXAF_PMTU_DISCOVERY if path MTU discovery is desired.
3704 * We avoid path MTU discovery if it is disabled with ndd.
3705 * Furtermore, if the path MTU is too small, then we don't set DF for IPv4.
3706 *
3707 * NOTE: We also used to turn it off for source routed packets. That
3708 * is no longer required since the dce is per final destination.
3709 */
3710 uint_t
3711 ip_get_pmtu(ip_xmit_attr_t *ixa)
3712 {
3713 ip_stack_t *ipst = ixa->ixa_ipst;
3714 dce_t *dce;
3715 nce_t *nce;
3716 ire_t *ire;
3717 uint_t pmtu;
3718
3719 ire = ixa->ixa_ire;
3720 dce = ixa->ixa_dce;
3721 nce = ixa->ixa_nce;
3722
3723 /*
3724 * If path MTU discovery has been turned off by ndd, then we ignore
3725 * any dce_pmtu and for IPv4 we will not set DF.
3726 */
3727 if (!ipst->ips_ip_path_mtu_discovery)
3728 ixa->ixa_flags &= ~IXAF_PMTU_DISCOVERY;
3729
3730 pmtu = IP_MAXPACKET;
3731 /*
3732 * Decide whether whether IPv4 sets DF
3733 * For IPv6 "no DF" means to use the 1280 mtu
3734 */
3735 if (ixa->ixa_flags & IXAF_PMTU_DISCOVERY) {
3736 ixa->ixa_flags |= IXAF_PMTU_IPV4_DF;
3737 } else {
3738 ixa->ixa_flags &= ~IXAF_PMTU_IPV4_DF;
3739 if (!(ixa->ixa_flags & IXAF_IS_IPV4))
3740 pmtu = IPV6_MIN_MTU;
3741 }
3742
3743 /* Check if the PMTU is to old before we use it */
3744 if ((dce->dce_flags & DCEF_PMTU) &&
3745 TICK_TO_SEC(ddi_get_lbolt64()) - dce->dce_last_change_time >
3746 ipst->ips_ip_pathmtu_interval) {
3747 /*
3748 * Older than 20 minutes. Drop the path MTU information.
3749 */
3750 mutex_enter(&dce->dce_lock);
3751 dce->dce_flags &= ~(DCEF_PMTU|DCEF_TOO_SMALL_PMTU);
3752 dce->dce_last_change_time = TICK_TO_SEC(ddi_get_lbolt64());
3753 mutex_exit(&dce->dce_lock);
3754 dce_increment_generation(dce);
3755 }
3756
3757 /* The metrics on the route can lower the path MTU */
3758 if (ire->ire_metrics.iulp_mtu != 0 &&
3759 ire->ire_metrics.iulp_mtu < pmtu)
3760 pmtu = ire->ire_metrics.iulp_mtu;
3761
3762 /*
3763 * If the path MTU is smaller than some minimum, we still use dce_pmtu
3764 * above (would be 576 for IPv4 and 1280 for IPv6), but we clear
3765 * IXAF_PMTU_IPV4_DF so that we avoid setting DF for IPv4.
3766 */
3767 if (ixa->ixa_flags & IXAF_PMTU_DISCOVERY) {
3768 if (dce->dce_flags & DCEF_PMTU) {
3769 if (dce->dce_pmtu < pmtu)
3770 pmtu = dce->dce_pmtu;
3771
3772 if (dce->dce_flags & DCEF_TOO_SMALL_PMTU) {
3773 ixa->ixa_flags |= IXAF_PMTU_TOO_SMALL;
3774 ixa->ixa_flags &= ~IXAF_PMTU_IPV4_DF;
3775 } else {
3776 ixa->ixa_flags &= ~IXAF_PMTU_TOO_SMALL;
3777 ixa->ixa_flags |= IXAF_PMTU_IPV4_DF;
3778 }
3779 } else {
3780 ixa->ixa_flags &= ~IXAF_PMTU_TOO_SMALL;
3781 ixa->ixa_flags |= IXAF_PMTU_IPV4_DF;
3782 }
3783 }
3784
3785 /*
3786 * If we have an IRE_LOCAL we use the loopback mtu instead of
3787 * the ill for going out the wire i.e., IRE_LOCAL gets the same
3788 * mtu as IRE_LOOPBACK.
3789 */
3790 if (ire->ire_type & (IRE_LOCAL|IRE_LOOPBACK)) {
3791 uint_t loopback_mtu;
3792
3793 loopback_mtu = (ire->ire_ipversion == IPV6_VERSION) ?
3794 ip_loopback_mtu_v6plus : ip_loopback_mtuplus;
3795
3796 if (loopback_mtu < pmtu)
3797 pmtu = loopback_mtu;
3798 } else if (nce != NULL) {
3799 /*
3800 * Make sure we don't exceed the interface MTU.
3801 * In the case of RTF_REJECT or RTF_BLACKHOLE we might not have
3802 * an ill. We'd use the above IP_MAXPACKET in that case just
3803 * to tell the transport something larger than zero.
3804 */
3805 if (ire->ire_type & (IRE_MULTICAST|IRE_BROADCAST)) {
3806 if (nce->nce_common->ncec_ill->ill_mc_mtu < pmtu)
3807 pmtu = nce->nce_common->ncec_ill->ill_mc_mtu;
3808 if (nce->nce_common->ncec_ill != nce->nce_ill &&
3809 nce->nce_ill->ill_mc_mtu < pmtu) {
3810 /*
3811 * for interfaces in an IPMP group, the mtu of
3812 * the nce_ill (under_ill) could be different
3813 * from the mtu of the ncec_ill, so we take the
3814 * min of the two.
3815 */
3816 pmtu = nce->nce_ill->ill_mc_mtu;
3817 }
3818 } else {
3819 if (nce->nce_common->ncec_ill->ill_mtu < pmtu)
3820 pmtu = nce->nce_common->ncec_ill->ill_mtu;
3821 if (nce->nce_common->ncec_ill != nce->nce_ill &&
3822 nce->nce_ill->ill_mtu < pmtu) {
3823 /*
3824 * for interfaces in an IPMP group, the mtu of
3825 * the nce_ill (under_ill) could be different
3826 * from the mtu of the ncec_ill, so we take the
3827 * min of the two.
3828 */
3829 pmtu = nce->nce_ill->ill_mtu;
3830 }
3831 }
3832 }
3833
3834 /*
3835 * Handle the IPV6_USE_MIN_MTU socket option or ancillary data.
3836 * Only applies to IPv6.
3837 */
3838 if (!(ixa->ixa_flags & IXAF_IS_IPV4)) {
3839 if (ixa->ixa_flags & IXAF_USE_MIN_MTU) {
3840 switch (ixa->ixa_use_min_mtu) {
3841 case IPV6_USE_MIN_MTU_MULTICAST:
3842 if (ire->ire_type & IRE_MULTICAST)
3843 pmtu = IPV6_MIN_MTU;
3844 break;
3845 case IPV6_USE_MIN_MTU_ALWAYS:
3846 pmtu = IPV6_MIN_MTU;
3847 break;
3848 case IPV6_USE_MIN_MTU_NEVER:
3849 break;
3850 }
3851 } else {
3852 /* Default is IPV6_USE_MIN_MTU_MULTICAST */
3853 if (ire->ire_type & IRE_MULTICAST)
3854 pmtu = IPV6_MIN_MTU;
3855 }
3856 }
3857
3858 /*
3859 * After receiving an ICMPv6 "packet too big" message with a
3860 * MTU < 1280, and for multirouted IPv6 packets, the IP layer
3861 * will insert a 8-byte fragment header in every packet. We compensate
3862 * for those cases by returning a smaller path MTU to the ULP.
3863 *
3864 * In the case of CGTP then ip_output will add a fragment header.
3865 * Make sure there is room for it by telling a smaller number
3866 * to the transport.
3867 *
3868 * When IXAF_IPV6_ADDR_FRAGHDR we subtract the frag hdr here
3869 * so the ULPs consistently see a iulp_pmtu and ip_get_pmtu()
3870 * which is the size of the packets it can send.
3871 */
3872 if (!(ixa->ixa_flags & IXAF_IS_IPV4)) {
3873 if ((dce->dce_flags & DCEF_TOO_SMALL_PMTU) ||
3874 (ire->ire_flags & RTF_MULTIRT) ||
3875 (ixa->ixa_flags & IXAF_MULTIRT_MULTICAST)) {
3876 pmtu -= sizeof (ip6_frag_t);
3877 ixa->ixa_flags |= IXAF_IPV6_ADD_FRAGHDR;
3878 }
3879 }
3880
3881 return (pmtu);
3882 }
3883
3884 /*
3885 * Carve "len" bytes out of an mblk chain, consuming any we empty, and duping
3886 * the final piece where we don't. Return a pointer to the first mblk in the
3887 * result, and update the pointer to the next mblk to chew on. If anything
3888 * goes wrong (i.e., dupb fails), we waste everything in sight and return a
3889 * NULL pointer.
3890 */
3891 mblk_t *
3892 ip_carve_mp(mblk_t **mpp, ssize_t len)
3893 {
3894 mblk_t *mp0;
3895 mblk_t *mp1;
3896 mblk_t *mp2;
3897
3898 if (!len || !mpp || !(mp0 = *mpp))
3899 return (NULL);
3900 /* If we aren't going to consume the first mblk, we need a dup. */
3901 if (mp0->b_wptr - mp0->b_rptr > len) {
3902 mp1 = dupb(mp0);
3903 if (mp1) {
3904 /* Partition the data between the two mblks. */
3905 mp1->b_wptr = mp1->b_rptr + len;
3906 mp0->b_rptr = mp1->b_wptr;
3907 /*
3908 * after adjustments if mblk not consumed is now
3909 * unaligned, try to align it. If this fails free
3910 * all messages and let upper layer recover.
3911 */
3912 if (!OK_32PTR(mp0->b_rptr)) {
3913 if (!pullupmsg(mp0, -1)) {
3914 freemsg(mp0);
3915 freemsg(mp1);
3916 *mpp = NULL;
3917 return (NULL);
3918 }
3919 }
3920 }
3921 return (mp1);
3922 }
3923 /* Eat through as many mblks as we need to get len bytes. */
3924 len -= mp0->b_wptr - mp0->b_rptr;
3925 for (mp2 = mp1 = mp0; (mp2 = mp2->b_cont) != 0 && len; mp1 = mp2) {
3926 if (mp2->b_wptr - mp2->b_rptr > len) {
3927 /*
3928 * We won't consume the entire last mblk. Like
3929 * above, dup and partition it.
3930 */
3931 mp1->b_cont = dupb(mp2);
3932 mp1 = mp1->b_cont;
3933 if (!mp1) {
3934 /*
3935 * Trouble. Rather than go to a lot of
3936 * trouble to clean up, we free the messages.
3937 * This won't be any worse than losing it on
3938 * the wire.
3939 */
3940 freemsg(mp0);
3941 freemsg(mp2);
3942 *mpp = NULL;
3943 return (NULL);
3944 }
3945 mp1->b_wptr = mp1->b_rptr + len;
3946 mp2->b_rptr = mp1->b_wptr;
3947 /*
3948 * after adjustments if mblk not consumed is now
3949 * unaligned, try to align it. If this fails free
3950 * all messages and let upper layer recover.
3951 */
3952 if (!OK_32PTR(mp2->b_rptr)) {
3953 if (!pullupmsg(mp2, -1)) {
3954 freemsg(mp0);
3955 freemsg(mp2);
3956 *mpp = NULL;
3957 return (NULL);
3958 }
3959 }
3960 *mpp = mp2;
3961 return (mp0);
3962 }
3963 /* Decrement len by the amount we just got. */
3964 len -= mp2->b_wptr - mp2->b_rptr;
3965 }
3966 /*
3967 * len should be reduced to zero now. If not our caller has
3968 * screwed up.
3969 */
3970 if (len) {
3971 /* Shouldn't happen! */
3972 freemsg(mp0);
3973 *mpp = NULL;
3974 return (NULL);
3975 }
3976 /*
3977 * We consumed up to exactly the end of an mblk. Detach the part
3978 * we are returning from the rest of the chain.
3979 */
3980 mp1->b_cont = NULL;
3981 *mpp = mp2;
3982 return (mp0);
3983 }
3984
3985 /* The ill stream is being unplumbed. Called from ip_close */
3986 int
3987 ip_modclose(ill_t *ill)
3988 {
3989 boolean_t success;
3990 ipsq_t *ipsq;
3991 ipif_t *ipif;
3992 queue_t *q = ill->ill_rq;
3993 ip_stack_t *ipst = ill->ill_ipst;
3994 int i;
3995 arl_ill_common_t *ai = ill->ill_common;
3996
3997 /*
3998 * The punlink prior to this may have initiated a capability
3999 * negotiation. But ipsq_enter will block until that finishes or
4000 * times out.
4001 */
4002 success = ipsq_enter(ill, B_FALSE, NEW_OP);
4003
4004 /*
4005 * Open/close/push/pop is guaranteed to be single threaded
4006 * per stream by STREAMS. FS guarantees that all references
4007 * from top are gone before close is called. So there can't
4008 * be another close thread that has set CONDEMNED on this ill.
4009 * and cause ipsq_enter to return failure.
4010 */
4011 ASSERT(success);
4012 ipsq = ill->ill_phyint->phyint_ipsq;
4013
4014 /*
4015 * Mark it condemned. No new reference will be made to this ill.
4016 * Lookup functions will return an error. Threads that try to
4017 * increment the refcnt must check for ILL_CAN_LOOKUP. This ensures
4018 * that the refcnt will drop down to zero.
4019 */
4020 mutex_enter(&ill->ill_lock);
4021 ill->ill_state_flags |= ILL_CONDEMNED;
4022 for (ipif = ill->ill_ipif; ipif != NULL;
4023 ipif = ipif->ipif_next) {
4024 ipif->ipif_state_flags |= IPIF_CONDEMNED;
4025 }
4026 /*
4027 * Wake up anybody waiting to enter the ipsq. ipsq_enter
4028 * returns error if ILL_CONDEMNED is set
4029 */
4030 cv_broadcast(&ill->ill_cv);
4031 mutex_exit(&ill->ill_lock);
4032
4033 /*
4034 * Send all the deferred DLPI messages downstream which came in
4035 * during the small window right before ipsq_enter(). We do this
4036 * without waiting for the ACKs because all the ACKs for M_PROTO
4037 * messages are ignored in ip_rput() when ILL_CONDEMNED is set.
4038 */
4039 ill_dlpi_send_deferred(ill);
4040
4041 /*
4042 * Shut down fragmentation reassembly.
4043 * ill_frag_timer won't start a timer again.
4044 * Now cancel any existing timer
4045 */
4046 (void) untimeout(ill->ill_frag_timer_id);
4047 (void) ill_frag_timeout(ill, 0);
4048
4049 /*
4050 * Call ill_delete to bring down the ipifs, ilms and ill on
4051 * this ill. Then wait for the refcnts to drop to zero.
4052 * ill_is_freeable checks whether the ill is really quiescent.
4053 * Then make sure that threads that are waiting to enter the
4054 * ipsq have seen the error returned by ipsq_enter and have
4055 * gone away. Then we call ill_delete_tail which does the
4056 * DL_UNBIND_REQ with the driver and then qprocsoff.
4057 */
4058 ill_delete(ill);
4059 mutex_enter(&ill->ill_lock);
4060 while (!ill_is_freeable(ill))
4061 cv_wait(&ill->ill_cv, &ill->ill_lock);
4062
4063 while (ill->ill_waiters)
4064 cv_wait(&ill->ill_cv, &ill->ill_lock);
4065
4066 mutex_exit(&ill->ill_lock);
4067
4068 /*
4069 * ill_delete_tail drops reference on ill_ipst, but we need to keep
4070 * it held until the end of the function since the cleanup
4071 * below needs to be able to use the ip_stack_t.
4072 */
4073 netstack_hold(ipst->ips_netstack);
4074
4075 /* qprocsoff is done via ill_delete_tail */
4076 ill_delete_tail(ill);
4077 /*
4078 * synchronously wait for arp stream to unbind. After this, we
4079 * cannot get any data packets up from the driver.
4080 */
4081 arp_unbind_complete(ill);
4082 ASSERT(ill->ill_ipst == NULL);
4083
4084 /*
4085 * Walk through all conns and qenable those that have queued data.
4086 * Close synchronization needs this to
4087 * be done to ensure that all upper layers blocked
4088 * due to flow control to the closing device
4089 * get unblocked.
4090 */
4091 ip1dbg(("ip_wsrv: walking\n"));
4092 for (i = 0; i < TX_FANOUT_SIZE; i++) {
4093 conn_walk_drain(ipst, &ipst->ips_idl_tx_list[i]);
4094 }
4095
4096 /*
4097 * ai can be null if this is an IPv6 ill, or if the IPv4
4098 * stream is being torn down before ARP was plumbed (e.g.,
4099 * /sbin/ifconfig plumbing a stream twice, and encountering
4100 * an error
4101 */
4102 if (ai != NULL) {
4103 ASSERT(!ill->ill_isv6);
4104 mutex_enter(&ai->ai_lock);
4105 ai->ai_ill = NULL;
4106 if (ai->ai_arl == NULL) {
4107 mutex_destroy(&ai->ai_lock);
4108 kmem_free(ai, sizeof (*ai));
4109 } else {
4110 cv_signal(&ai->ai_ill_unplumb_done);
4111 mutex_exit(&ai->ai_lock);
4112 }
4113 }
4114
4115 mutex_enter(&ipst->ips_ip_mi_lock);
4116 mi_close_unlink(&ipst->ips_ip_g_head, (IDP)ill);
4117 mutex_exit(&ipst->ips_ip_mi_lock);
4118
4119 /*
4120 * credp could be null if the open didn't succeed and ip_modopen
4121 * itself calls ip_close.
4122 */
4123 if (ill->ill_credp != NULL)
4124 crfree(ill->ill_credp);
4125
4126 mutex_destroy(&ill->ill_saved_ire_lock);
4127 mutex_destroy(&ill->ill_lock);
4128 rw_destroy(&ill->ill_mcast_lock);
4129 mutex_destroy(&ill->ill_mcast_serializer);
4130 list_destroy(&ill->ill_nce);
4131
4132 /*
4133 * Now we are done with the module close pieces that
4134 * need the netstack_t.
4135 */
4136 netstack_rele(ipst->ips_netstack);
4137
4138 mi_close_free((IDP)ill);
4139 q->q_ptr = WR(q)->q_ptr = NULL;
4140
4141 ipsq_exit(ipsq);
4142
4143 return (0);
4144 }
4145
4146 /*
4147 * This is called as part of close() for IP, UDP, ICMP, and RTS
4148 * in order to quiesce the conn.
4149 */
4150 void
4151 ip_quiesce_conn(conn_t *connp)
4152 {
4153 boolean_t drain_cleanup_reqd = B_FALSE;
4154 boolean_t conn_ioctl_cleanup_reqd = B_FALSE;
4155 boolean_t ilg_cleanup_reqd = B_FALSE;
4156 ip_stack_t *ipst;
4157
4158 ASSERT(!IPCL_IS_TCP(connp));
4159 ipst = connp->conn_netstack->netstack_ip;
4160
4161 /*
4162 * Mark the conn as closing, and this conn must not be
4163 * inserted in future into any list. Eg. conn_drain_insert(),
4164 * won't insert this conn into the conn_drain_list.
4165 *
4166 * conn_idl, and conn_ilg cannot get set henceforth.
4167 */
4168 mutex_enter(&connp->conn_lock);
4169 ASSERT(!(connp->conn_state_flags & CONN_QUIESCED));
4170 connp->conn_state_flags |= CONN_CLOSING;
4171 if (connp->conn_idl != NULL)
4172 drain_cleanup_reqd = B_TRUE;
4173 if (connp->conn_oper_pending_ill != NULL)
4174 conn_ioctl_cleanup_reqd = B_TRUE;
4175 if (connp->conn_dhcpinit_ill != NULL) {
4176 ASSERT(connp->conn_dhcpinit_ill->ill_dhcpinit != 0);
4177 atomic_dec_32(&connp->conn_dhcpinit_ill->ill_dhcpinit);
4178 ill_set_inputfn(connp->conn_dhcpinit_ill);
4179 connp->conn_dhcpinit_ill = NULL;
4180 }
4181 if (connp->conn_ilg != NULL)
4182 ilg_cleanup_reqd = B_TRUE;
4183 mutex_exit(&connp->conn_lock);
4184
4185 if (conn_ioctl_cleanup_reqd)
4186 conn_ioctl_cleanup(connp);
4187
4188 if (is_system_labeled() && connp->conn_anon_port) {
4189 (void) tsol_mlp_anon(crgetzone(connp->conn_cred),
4190 connp->conn_mlp_type, connp->conn_proto,
4191 ntohs(connp->conn_lport), B_FALSE);
4192 connp->conn_anon_port = 0;
4193 }
4194 connp->conn_mlp_type = mlptSingle;
4195
4196 /*
4197 * Remove this conn from any fanout list it is on.
4198 * and then wait for any threads currently operating
4199 * on this endpoint to finish
4200 */
4201 ipcl_hash_remove(connp);
4202
4203 /*
4204 * Remove this conn from the drain list, and do any other cleanup that
4205 * may be required. (TCP conns are never flow controlled, and
4206 * conn_idl will be NULL.)
4207 */
4208 if (drain_cleanup_reqd && connp->conn_idl != NULL) {
4209 idl_t *idl = connp->conn_idl;
4210
4211 mutex_enter(&idl->idl_lock);
4212 conn_drain(connp, B_TRUE);
4213 mutex_exit(&idl->idl_lock);
4214 }
4215
4216 if (connp == ipst->ips_ip_g_mrouter)
4217 (void) ip_mrouter_done(ipst);
4218
4219 if (ilg_cleanup_reqd)
4220 ilg_delete_all(connp);
4221
4222 /*
4223 * Now conn refcnt can increase only thru CONN_INC_REF_LOCKED.
4224 * callers from write side can't be there now because close
4225 * is in progress. The only other caller is ipcl_walk
4226 * which checks for the condemned flag.
4227 */
4228 mutex_enter(&connp->conn_lock);
4229 connp->conn_state_flags |= CONN_CONDEMNED;
4230 while (connp->conn_ref != 1)
4231 cv_wait(&connp->conn_cv, &connp->conn_lock);
4232 connp->conn_state_flags |= CONN_QUIESCED;
4233 mutex_exit(&connp->conn_lock);
4234 }
4235
4236 /* ARGSUSED */
4237 int
4238 ip_close(queue_t *q, int flags)
4239 {
4240 conn_t *connp;
4241
4242 /*
4243 * Call the appropriate delete routine depending on whether this is
4244 * a module or device.
4245 */
4246 if (WR(q)->q_next != NULL) {
4247 /* This is a module close */
4248 return (ip_modclose((ill_t *)q->q_ptr));
4249 }
4250
4251 connp = q->q_ptr;
4252 ip_quiesce_conn(connp);
4253
4254 qprocsoff(q);
4255
4256 /*
4257 * Now we are truly single threaded on this stream, and can
4258 * delete the things hanging off the connp, and finally the connp.
4259 * We removed this connp from the fanout list, it cannot be
4260 * accessed thru the fanouts, and we already waited for the
4261 * conn_ref to drop to 0. We are already in close, so
4262 * there cannot be any other thread from the top. qprocsoff
4263 * has completed, and service has completed or won't run in
4264 * future.
4265 */
4266 ASSERT(connp->conn_ref == 1);
4267
4268 inet_minor_free(connp->conn_minor_arena, connp->conn_dev);
4269
4270 connp->conn_ref--;
4271 ipcl_conn_destroy(connp);
4272
4273 q->q_ptr = WR(q)->q_ptr = NULL;
4274 return (0);
4275 }
4276
4277 /*
4278 * Wapper around putnext() so that ip_rts_request can merely use
4279 * conn_recv.
4280 */
4281 /*ARGSUSED2*/
4282 static void
4283 ip_conn_input(void *arg1, mblk_t *mp, void *arg2, ip_recv_attr_t *ira)
4284 {
4285 conn_t *connp = (conn_t *)arg1;
4286
4287 putnext(connp->conn_rq, mp);
4288 }
4289
4290 /* Dummy in case ICMP error delivery is attempted to a /dev/ip instance */
4291 /* ARGSUSED */
4292 static void
4293 ip_conn_input_icmp(void *arg1, mblk_t *mp, void *arg2, ip_recv_attr_t *ira)
4294 {
4295 freemsg(mp);
4296 }
4297
4298 /*
4299 * Called when the module is about to be unloaded
4300 */
4301 void
4302 ip_ddi_destroy(void)
4303 {
4304 /* This needs to be called before destroying any transports. */
4305 mutex_enter(&cpu_lock);
4306 unregister_cpu_setup_func(ip_tp_cpu_update, NULL);
4307 mutex_exit(&cpu_lock);
4308
4309 tnet_fini();
4310
4311 icmp_ddi_g_destroy();
4312 rts_ddi_g_destroy();
4313 udp_ddi_g_destroy();
4314 sctp_ddi_g_destroy();
4315 tcp_ddi_g_destroy();
4316 ilb_ddi_g_destroy();
4317 dce_g_destroy();
4318 ipsec_policy_g_destroy();
4319 ipcl_g_destroy();
4320 ip_net_g_destroy();
4321 ip_ire_g_fini();
4322 inet_minor_destroy(ip_minor_arena_sa);
4323 #if defined(_LP64)
4324 inet_minor_destroy(ip_minor_arena_la);
4325 #endif
4326
4327 #ifdef DEBUG
4328 list_destroy(&ip_thread_list);
4329 rw_destroy(&ip_thread_rwlock);
4330 tsd_destroy(&ip_thread_data);
4331 #endif
4332
4333 netstack_unregister(NS_IP);
4334 }
4335
4336 /*
4337 * First step in cleanup.
4338 */
4339 /* ARGSUSED */
4340 static void
4341 ip_stack_shutdown(netstackid_t stackid, void *arg)
4342 {
4343 ip_stack_t *ipst = (ip_stack_t *)arg;
4344 kt_did_t ktid;
4345
4346 #ifdef NS_DEBUG
4347 printf("ip_stack_shutdown(%p, stack %d)\n", (void *)ipst, stackid);
4348 #endif
4349
4350 /*
4351 * Perform cleanup for special interfaces (loopback and IPMP).
4352 */
4353 ip_interface_cleanup(ipst);
4354
4355 /*
4356 * The *_hook_shutdown()s start the process of notifying any
4357 * consumers that things are going away.... nothing is destroyed.
4358 */
4359 ipv4_hook_shutdown(ipst);
4360 ipv6_hook_shutdown(ipst);
4361 arp_hook_shutdown(ipst);
4362
4363 mutex_enter(&ipst->ips_capab_taskq_lock);
4364 ktid = ipst->ips_capab_taskq_thread->t_did;
4365 ipst->ips_capab_taskq_quit = B_TRUE;
4366 cv_signal(&ipst->ips_capab_taskq_cv);
4367 mutex_exit(&ipst->ips_capab_taskq_lock);
4368
4369 /*
4370 * In rare occurrences, particularly on virtual hardware where CPUs can
4371 * be de-scheduled, the thread that we just signaled will not run until
4372 * after we have gotten through parts of ip_stack_fini. If that happens
4373 * then we'll try to grab the ips_capab_taskq_lock as part of returning
4374 * from cv_wait which no longer exists.
4375 */
4376 thread_join(ktid);
4377 }
4378
4379 /*
4380 * Free the IP stack instance.
4381 */
4382 static void
4383 ip_stack_fini(netstackid_t stackid, void *arg)
4384 {
4385 ip_stack_t *ipst = (ip_stack_t *)arg;
4386 int ret;
4387
4388 #ifdef NS_DEBUG
4389 printf("ip_stack_fini(%p, stack %d)\n", (void *)ipst, stackid);
4390 #endif
4391 /*
4392 * At this point, all of the notifications that the events and
4393 * protocols are going away have been run, meaning that we can
4394 * now set about starting to clean things up.
4395 */
4396 ipobs_fini(ipst);
4397 ipv4_hook_destroy(ipst);
4398 ipv6_hook_destroy(ipst);
4399 arp_hook_destroy(ipst);
4400 ip_net_destroy(ipst);
4401
4402 ipmp_destroy(ipst);
4403
4404 ip_kstat_fini(stackid, ipst->ips_ip_mibkp);
4405 ipst->ips_ip_mibkp = NULL;
4406 icmp_kstat_fini(stackid, ipst->ips_icmp_mibkp);
4407 ipst->ips_icmp_mibkp = NULL;
4408 ip_kstat2_fini(stackid, ipst->ips_ip_kstat);
4409 ipst->ips_ip_kstat = NULL;
4410 bzero(&ipst->ips_ip_statistics, sizeof (ipst->ips_ip_statistics));
4411 ip6_kstat_fini(stackid, ipst->ips_ip6_kstat);
4412 ipst->ips_ip6_kstat = NULL;
4413 bzero(&ipst->ips_ip6_statistics, sizeof (ipst->ips_ip6_statistics));
4414
4415 kmem_free(ipst->ips_propinfo_tbl,
4416 ip_propinfo_count * sizeof (mod_prop_info_t));
4417 ipst->ips_propinfo_tbl = NULL;
4418
4419 dce_stack_destroy(ipst);
4420 ip_mrouter_stack_destroy(ipst);
4421
4422 ret = untimeout(ipst->ips_igmp_timeout_id);
4423 if (ret == -1) {
4424 ASSERT(ipst->ips_igmp_timeout_id == 0);
4425 } else {
4426 ASSERT(ipst->ips_igmp_timeout_id != 0);
4427 ipst->ips_igmp_timeout_id = 0;
4428 }
4429 ret = untimeout(ipst->ips_igmp_slowtimeout_id);
4430 if (ret == -1) {
4431 ASSERT(ipst->ips_igmp_slowtimeout_id == 0);
4432 } else {
4433 ASSERT(ipst->ips_igmp_slowtimeout_id != 0);
4434 ipst->ips_igmp_slowtimeout_id = 0;
4435 }
4436 ret = untimeout(ipst->ips_mld_timeout_id);
4437 if (ret == -1) {
4438 ASSERT(ipst->ips_mld_timeout_id == 0);
4439 } else {
4440 ASSERT(ipst->ips_mld_timeout_id != 0);
4441 ipst->ips_mld_timeout_id = 0;
4442 }
4443 ret = untimeout(ipst->ips_mld_slowtimeout_id);
4444 if (ret == -1) {
4445 ASSERT(ipst->ips_mld_slowtimeout_id == 0);
4446 } else {
4447 ASSERT(ipst->ips_mld_slowtimeout_id != 0);
4448 ipst->ips_mld_slowtimeout_id = 0;
4449 }
4450
4451 ip_ire_fini(ipst);
4452 ip6_asp_free(ipst);
4453 conn_drain_fini(ipst);
4454 ipcl_destroy(ipst);
4455
4456 mutex_destroy(&ipst->ips_ndp4->ndp_g_lock);
4457 mutex_destroy(&ipst->ips_ndp6->ndp_g_lock);
4458 kmem_free(ipst->ips_ndp4, sizeof (ndp_g_t));
4459 ipst->ips_ndp4 = NULL;
4460 kmem_free(ipst->ips_ndp6, sizeof (ndp_g_t));
4461 ipst->ips_ndp6 = NULL;
4462
4463 if (ipst->ips_loopback_ksp != NULL) {
4464 kstat_delete_netstack(ipst->ips_loopback_ksp, stackid);
4465 ipst->ips_loopback_ksp = NULL;
4466 }
4467
4468 mutex_destroy(&ipst->ips_capab_taskq_lock);
4469 cv_destroy(&ipst->ips_capab_taskq_cv);
4470
4471 rw_destroy(&ipst->ips_srcid_lock);
4472
4473 mutex_destroy(&ipst->ips_ip_mi_lock);
4474 rw_destroy(&ipst->ips_ill_g_usesrc_lock);
4475
4476 mutex_destroy(&ipst->ips_igmp_timer_lock);
4477 mutex_destroy(&ipst->ips_mld_timer_lock);
4478 mutex_destroy(&ipst->ips_igmp_slowtimeout_lock);
4479 mutex_destroy(&ipst->ips_mld_slowtimeout_lock);
4480 mutex_destroy(&ipst->ips_ip_addr_avail_lock);
4481 rw_destroy(&ipst->ips_ill_g_lock);
4482
4483 kmem_free(ipst->ips_phyint_g_list, sizeof (phyint_list_t));
4484 ipst->ips_phyint_g_list = NULL;
4485 kmem_free(ipst->ips_ill_g_heads, sizeof (ill_g_head_t) * MAX_G_HEADS);
4486 ipst->ips_ill_g_heads = NULL;
4487
4488 ldi_ident_release(ipst->ips_ldi_ident);
4489 kmem_free(ipst, sizeof (*ipst));
4490 }
4491
4492 /*
4493 * This function is called from the TSD destructor, and is used to debug
4494 * reference count issues in IP. See block comment in <inet/ip_if.h> for
4495 * details.
4496 */
4497 static void
4498 ip_thread_exit(void *phash)
4499 {
4500 th_hash_t *thh = phash;
4501
4502 rw_enter(&ip_thread_rwlock, RW_WRITER);
4503 list_remove(&ip_thread_list, thh);
4504 rw_exit(&ip_thread_rwlock);
4505 mod_hash_destroy_hash(thh->thh_hash);
4506 kmem_free(thh, sizeof (*thh));
4507 }
4508
4509 /*
4510 * Called when the IP kernel module is loaded into the kernel
4511 */
4512 void
4513 ip_ddi_init(void)
4514 {
4515 ip_squeue_flag = ip_squeue_switch(ip_squeue_enter);
4516
4517 /*
4518 * For IP and TCP the minor numbers should start from 2 since we have 4
4519 * initial devices: ip, ip6, tcp, tcp6.
4520 */
4521 /*
4522 * If this is a 64-bit kernel, then create two separate arenas -
4523 * one for TLIs in the range of INET_MIN_DEV+2 through 2^^18-1, and the
4524 * other for socket apps in the range 2^^18 through 2^^32-1.
4525 */
4526 ip_minor_arena_la = NULL;
4527 ip_minor_arena_sa = NULL;
4528 #if defined(_LP64)
4529 if ((ip_minor_arena_sa = inet_minor_create("ip_minor_arena_sa",
4530 INET_MIN_DEV + 2, MAXMIN32, KM_SLEEP)) == NULL) {
4531 cmn_err(CE_PANIC,
4532 "ip_ddi_init: ip_minor_arena_sa creation failed\n");
4533 }
4534 if ((ip_minor_arena_la = inet_minor_create("ip_minor_arena_la",
4535 MAXMIN32 + 1, MAXMIN64, KM_SLEEP)) == NULL) {
4536 cmn_err(CE_PANIC,
4537 "ip_ddi_init: ip_minor_arena_la creation failed\n");
4538 }
4539 #else
4540 if ((ip_minor_arena_sa = inet_minor_create("ip_minor_arena_sa",
4541 INET_MIN_DEV + 2, MAXMIN, KM_SLEEP)) == NULL) {
4542 cmn_err(CE_PANIC,
4543 "ip_ddi_init: ip_minor_arena_sa creation failed\n");
4544 }
4545 #endif
4546 ip_poll_normal_ticks = MSEC_TO_TICK_ROUNDUP(ip_poll_normal_ms);
4547
4548 ipcl_g_init();
4549 ip_ire_g_init();
4550 ip_net_g_init();
4551
4552 #ifdef DEBUG
4553 tsd_create(&ip_thread_data, ip_thread_exit);
4554 rw_init(&ip_thread_rwlock, NULL, RW_DEFAULT, NULL);
4555 list_create(&ip_thread_list, sizeof (th_hash_t),
4556 offsetof(th_hash_t, thh_link));
4557 #endif
4558 ipsec_policy_g_init();
4559 tcp_ddi_g_init();
4560 sctp_ddi_g_init();
4561 dce_g_init();
4562
4563 /*
4564 * We want to be informed each time a stack is created or
4565 * destroyed in the kernel, so we can maintain the
4566 * set of udp_stack_t's.
4567 */
4568 netstack_register(NS_IP, ip_stack_init, ip_stack_shutdown,
4569 ip_stack_fini);
4570
4571 tnet_init();
4572
4573 udp_ddi_g_init();
4574 rts_ddi_g_init();
4575 icmp_ddi_g_init();
4576 ilb_ddi_g_init();
4577
4578 /* This needs to be called after all transports are initialized. */
4579 mutex_enter(&cpu_lock);
4580 register_cpu_setup_func(ip_tp_cpu_update, NULL);
4581 mutex_exit(&cpu_lock);
4582 }
4583
4584 /*
4585 * Initialize the IP stack instance.
4586 */
4587 static void *
4588 ip_stack_init(netstackid_t stackid, netstack_t *ns)
4589 {
4590 ip_stack_t *ipst;
4591 size_t arrsz;
4592 major_t major;
4593
4594 #ifdef NS_DEBUG
4595 printf("ip_stack_init(stack %d)\n", stackid);
4596 #endif
4597
4598 ipst = (ip_stack_t *)kmem_zalloc(sizeof (*ipst), KM_SLEEP);
4599 ipst->ips_netstack = ns;
4600
4601 ipst->ips_ill_g_heads = kmem_zalloc(sizeof (ill_g_head_t) * MAX_G_HEADS,
4602 KM_SLEEP);
4603 ipst->ips_phyint_g_list = kmem_zalloc(sizeof (phyint_list_t),
4604 KM_SLEEP);
4605 ipst->ips_ndp4 = kmem_zalloc(sizeof (ndp_g_t), KM_SLEEP);
4606 ipst->ips_ndp6 = kmem_zalloc(sizeof (ndp_g_t), KM_SLEEP);
4607 mutex_init(&ipst->ips_ndp4->ndp_g_lock, NULL, MUTEX_DEFAULT, NULL);
4608 mutex_init(&ipst->ips_ndp6->ndp_g_lock, NULL, MUTEX_DEFAULT, NULL);
4609
4610 mutex_init(&ipst->ips_igmp_timer_lock, NULL, MUTEX_DEFAULT, NULL);
4611 ipst->ips_igmp_deferred_next = INFINITY;
4612 mutex_init(&ipst->ips_mld_timer_lock, NULL, MUTEX_DEFAULT, NULL);
4613 ipst->ips_mld_deferred_next = INFINITY;
4614 mutex_init(&ipst->ips_igmp_slowtimeout_lock, NULL, MUTEX_DEFAULT, NULL);
4615 mutex_init(&ipst->ips_mld_slowtimeout_lock, NULL, MUTEX_DEFAULT, NULL);
4616 mutex_init(&ipst->ips_ip_mi_lock, NULL, MUTEX_DEFAULT, NULL);
4617 mutex_init(&ipst->ips_ip_addr_avail_lock, NULL, MUTEX_DEFAULT, NULL);
4618 rw_init(&ipst->ips_ill_g_lock, NULL, RW_DEFAULT, NULL);
4619 rw_init(&ipst->ips_ill_g_usesrc_lock, NULL, RW_DEFAULT, NULL);
4620
4621 ipcl_init(ipst);
4622 ip_ire_init(ipst);
4623 ip6_asp_init(ipst);
4624 ipif_init(ipst);
4625 conn_drain_init(ipst);
4626 ip_mrouter_stack_init(ipst);
4627 dce_stack_init(ipst);
4628
4629 ipst->ips_ip_multirt_log_interval = 1000;
4630
4631 ipst->ips_ill_index = 1;
4632
4633 ipst->ips_saved_ip_forwarding = -1;
4634 ipst->ips_reg_vif_num = ALL_VIFS; /* Index to Register vif */
4635
4636 arrsz = ip_propinfo_count * sizeof (mod_prop_info_t);
4637 ipst->ips_propinfo_tbl = (mod_prop_info_t *)kmem_alloc(arrsz, KM_SLEEP);
4638 bcopy(ip_propinfo_tbl, ipst->ips_propinfo_tbl, arrsz);
4639
4640 ipst->ips_ip_mibkp = ip_kstat_init(stackid, ipst);
4641 ipst->ips_icmp_mibkp = icmp_kstat_init(stackid);
4642 ipst->ips_ip_kstat = ip_kstat2_init(stackid, &ipst->ips_ip_statistics);
4643 ipst->ips_ip6_kstat =
4644 ip6_kstat_init(stackid, &ipst->ips_ip6_statistics);
4645
4646 ipst->ips_ip_src_id = 1;
4647 rw_init(&ipst->ips_srcid_lock, NULL, RW_DEFAULT, NULL);
4648
4649 ipst->ips_src_generation = SRC_GENERATION_INITIAL;
4650
4651 ip_net_init(ipst, ns);
4652 ipv4_hook_init(ipst);
4653 ipv6_hook_init(ipst);
4654 arp_hook_init(ipst);
4655 ipmp_init(ipst);
4656 ipobs_init(ipst);
4657
4658 /*
4659 * Create the taskq dispatcher thread and initialize related stuff.
4660 */
4661 mutex_init(&ipst->ips_capab_taskq_lock, NULL, MUTEX_DEFAULT, NULL);
4662 cv_init(&ipst->ips_capab_taskq_cv, NULL, CV_DEFAULT, NULL);
4663 ipst->ips_capab_taskq_thread = thread_create(NULL, 0,
4664 ill_taskq_dispatch, ipst, 0, &p0, TS_RUN, minclsyspri);
4665
4666 major = mod_name_to_major(INET_NAME);
4667 (void) ldi_ident_from_major(major, &ipst->ips_ldi_ident);
4668 return (ipst);
4669 }
4670
4671 /*
4672 * Allocate and initialize a DLPI template of the specified length. (May be
4673 * called as writer.)
4674 */
4675 mblk_t *
4676 ip_dlpi_alloc(size_t len, t_uscalar_t prim)
4677 {
4678 mblk_t *mp;
4679
4680 mp = allocb(len, BPRI_MED);
4681 if (!mp)
4682 return (NULL);
4683
4684 /*
4685 * DLPIv2 says that DL_INFO_REQ and DL_TOKEN_REQ (the latter
4686 * of which we don't seem to use) are sent with M_PCPROTO, and
4687 * that other DLPI are M_PROTO.
4688 */
4689 if (prim == DL_INFO_REQ) {
4690 mp->b_datap->db_type = M_PCPROTO;
4691 } else {
4692 mp->b_datap->db_type = M_PROTO;
4693 }
4694
4695 mp->b_wptr = mp->b_rptr + len;
4696 bzero(mp->b_rptr, len);
4697 ((dl_unitdata_req_t *)mp->b_rptr)->dl_primitive = prim;
4698 return (mp);
4699 }
4700
4701 /*
4702 * Allocate and initialize a DLPI notification. (May be called as writer.)
4703 */
4704 mblk_t *
4705 ip_dlnotify_alloc(uint_t notification, uint_t data)
4706 {
4707 dl_notify_ind_t *notifyp;
4708 mblk_t *mp;
4709
4710 if ((mp = ip_dlpi_alloc(DL_NOTIFY_IND_SIZE, DL_NOTIFY_IND)) == NULL)
4711 return (NULL);
4712
4713 notifyp = (dl_notify_ind_t *)mp->b_rptr;
4714 notifyp->dl_notification = notification;
4715 notifyp->dl_data = data;
4716 return (mp);
4717 }
4718
4719 mblk_t *
4720 ip_dlnotify_alloc2(uint_t notification, uint_t data1, uint_t data2)
4721 {
4722 dl_notify_ind_t *notifyp;
4723 mblk_t *mp;
4724
4725 if ((mp = ip_dlpi_alloc(DL_NOTIFY_IND_SIZE, DL_NOTIFY_IND)) == NULL)
4726 return (NULL);
4727
4728 notifyp = (dl_notify_ind_t *)mp->b_rptr;
4729 notifyp->dl_notification = notification;
4730 notifyp->dl_data1 = data1;
4731 notifyp->dl_data2 = data2;
4732 return (mp);
4733 }
4734
4735 /*
4736 * Debug formatting routine. Returns a character string representation of the
4737 * addr in buf, of the form xxx.xxx.xxx.xxx. This routine takes the address
4738 * in the form of a ipaddr_t and calls ip_dot_saddr with a pointer.
4739 *
4740 * Once the ndd table-printing interfaces are removed, this can be changed to
4741 * standard dotted-decimal form.
4742 */
4743 char *
4744 ip_dot_addr(ipaddr_t addr, char *buf)
4745 {
4746 uint8_t *ap = (uint8_t *)&addr;
4747
4748 (void) mi_sprintf(buf, "%03d.%03d.%03d.%03d",
4749 ap[0] & 0xFF, ap[1] & 0xFF, ap[2] & 0xFF, ap[3] & 0xFF);
4750 return (buf);
4751 }
4752
4753 /*
4754 * Write the given MAC address as a printable string in the usual colon-
4755 * separated format.
4756 */
4757 const char *
4758 mac_colon_addr(const uint8_t *addr, size_t alen, char *buf, size_t buflen)
4759 {
4760 char *bp;
4761
4762 if (alen == 0 || buflen < 4)
4763 return ("?");
4764 bp = buf;
4765 for (;;) {
4766 /*
4767 * If there are more MAC address bytes available, but we won't
4768 * have any room to print them, then add "..." to the string
4769 * instead. See below for the 'magic number' explanation.
4770 */
4771 if ((alen == 2 && buflen < 6) || (alen > 2 && buflen < 7)) {
4772 (void) strcpy(bp, "...");
4773 break;
4774 }
4775 (void) sprintf(bp, "%02x", *addr++);
4776 bp += 2;
4777 if (--alen == 0)
4778 break;
4779 *bp++ = ':';
4780 buflen -= 3;
4781 /*
4782 * At this point, based on the first 'if' statement above,
4783 * either alen == 1 and buflen >= 3, or alen > 1 and
4784 * buflen >= 4. The first case leaves room for the final "xx"
4785 * number and trailing NUL byte. The second leaves room for at
4786 * least "...". Thus the apparently 'magic' numbers chosen for
4787 * that statement.
4788 */
4789 }
4790 return (buf);
4791 }
4792
4793 /*
4794 * Called when it is conceptually a ULP that would sent the packet
4795 * e.g., port unreachable and protocol unreachable. Check that the packet
4796 * would have passed the IPsec global policy before sending the error.
4797 *
4798 * Send an ICMP error after patching up the packet appropriately.
4799 * Uses ip_drop_input and bumps the appropriate MIB.
4800 */
4801 void
4802 ip_fanout_send_icmp_v4(mblk_t *mp, uint_t icmp_type, uint_t icmp_code,
4803 ip_recv_attr_t *ira)
4804 {
4805 ipha_t *ipha;
4806 boolean_t secure;
4807 ill_t *ill = ira->ira_ill;
4808 ip_stack_t *ipst = ill->ill_ipst;
4809 netstack_t *ns = ipst->ips_netstack;
4810 ipsec_stack_t *ipss = ns->netstack_ipsec;
4811
4812 secure = ira->ira_flags & IRAF_IPSEC_SECURE;
4813
4814 /*
4815 * We are generating an icmp error for some inbound packet.
4816 * Called from all ip_fanout_(udp, tcp, proto) functions.
4817 * Before we generate an error, check with global policy
4818 * to see whether this is allowed to enter the system. As
4819 * there is no "conn", we are checking with global policy.
4820 */
4821 ipha = (ipha_t *)mp->b_rptr;
4822 if (secure || ipss->ipsec_inbound_v4_policy_present) {
4823 mp = ipsec_check_global_policy(mp, NULL, ipha, NULL, ira, ns);
4824 if (mp == NULL)
4825 return;
4826 }
4827
4828 /* We never send errors for protocols that we do implement */
4829 if (ira->ira_protocol == IPPROTO_ICMP ||
4830 ira->ira_protocol == IPPROTO_IGMP) {
4831 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
4832 ip_drop_input("ip_fanout_send_icmp_v4", mp, ill);
4833 freemsg(mp);
4834 return;
4835 }
4836 /*
4837 * Have to correct checksum since
4838 * the packet might have been
4839 * fragmented and the reassembly code in ip_rput
4840 * does not restore the IP checksum.
4841 */
4842 ipha->ipha_hdr_checksum = 0;
4843 ipha->ipha_hdr_checksum = ip_csum_hdr(ipha);
4844
4845 switch (icmp_type) {
4846 case ICMP_DEST_UNREACHABLE:
4847 switch (icmp_code) {
4848 case ICMP_PROTOCOL_UNREACHABLE:
4849 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInUnknownProtos);
4850 ip_drop_input("ipIfStatsInUnknownProtos", mp, ill);
4851 break;
4852 case ICMP_PORT_UNREACHABLE:
4853 BUMP_MIB(ill->ill_ip_mib, udpIfStatsNoPorts);
4854 ip_drop_input("ipIfStatsNoPorts", mp, ill);
4855 break;
4856 }
4857
4858 icmp_unreachable(mp, icmp_code, ira);
4859 break;
4860 default:
4861 #ifdef DEBUG
4862 panic("ip_fanout_send_icmp_v4: wrong type");
4863 /*NOTREACHED*/
4864 #else
4865 freemsg(mp);
4866 break;
4867 #endif
4868 }
4869 }
4870
4871 /*
4872 * Used to send an ICMP error message when a packet is received for
4873 * a protocol that is not supported. The mblk passed as argument
4874 * is consumed by this function.
4875 */
4876 void
4877 ip_proto_not_sup(mblk_t *mp, ip_recv_attr_t *ira)
4878 {
4879 ipha_t *ipha;
4880
4881 ipha = (ipha_t *)mp->b_rptr;
4882 if (ira->ira_flags & IRAF_IS_IPV4) {
4883 ASSERT(IPH_HDR_VERSION(ipha) == IP_VERSION);
4884 ip_fanout_send_icmp_v4(mp, ICMP_DEST_UNREACHABLE,
4885 ICMP_PROTOCOL_UNREACHABLE, ira);
4886 } else {
4887 ASSERT(IPH_HDR_VERSION(ipha) == IPV6_VERSION);
4888 ip_fanout_send_icmp_v6(mp, ICMP6_PARAM_PROB,
4889 ICMP6_PARAMPROB_NEXTHEADER, ira);
4890 }
4891 }
4892
4893 /*
4894 * Deliver a rawip packet to the given conn, possibly applying ipsec policy.
4895 * Handles IPv4 and IPv6.
4896 * We are responsible for disposing of mp, such as by freemsg() or putnext()
4897 * Caller is responsible for dropping references to the conn.
4898 */
4899 void
4900 ip_fanout_proto_conn(conn_t *connp, mblk_t *mp, ipha_t *ipha, ip6_t *ip6h,
4901 ip_recv_attr_t *ira)
4902 {
4903 ill_t *ill = ira->ira_ill;
4904 ip_stack_t *ipst = ill->ill_ipst;
4905 ipsec_stack_t *ipss = ipst->ips_netstack->netstack_ipsec;
4906 boolean_t secure;
4907 uint_t protocol = ira->ira_protocol;
4908 iaflags_t iraflags = ira->ira_flags;
4909 queue_t *rq;
4910
4911 secure = iraflags & IRAF_IPSEC_SECURE;
4912
4913 rq = connp->conn_rq;
4914 if (IPCL_IS_NONSTR(connp) ? connp->conn_flow_cntrld : !canputnext(rq)) {
4915 switch (protocol) {
4916 case IPPROTO_ICMPV6:
4917 BUMP_MIB(ill->ill_icmp6_mib, ipv6IfIcmpInOverflows);
4918 break;
4919 case IPPROTO_ICMP:
4920 BUMP_MIB(&ipst->ips_icmp_mib, icmpInOverflows);
4921 break;
4922 default:
4923 BUMP_MIB(ill->ill_ip_mib, rawipIfStatsInOverflows);
4924 break;
4925 }
4926 freemsg(mp);
4927 return;
4928 }
4929
4930 ASSERT(!(IPCL_IS_IPTUN(connp)));
4931
4932 if (((iraflags & IRAF_IS_IPV4) ?
4933 CONN_INBOUND_POLICY_PRESENT(connp, ipss) :
4934 CONN_INBOUND_POLICY_PRESENT_V6(connp, ipss)) ||
4935 secure) {
4936 mp = ipsec_check_inbound_policy(mp, connp, ipha,
4937 ip6h, ira);
4938 if (mp == NULL) {
4939 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
4940 /* Note that mp is NULL */
4941 ip_drop_input("ipIfStatsInDiscards", mp, ill);
4942 return;
4943 }
4944 }
4945
4946 if (iraflags & IRAF_ICMP_ERROR) {
4947 (connp->conn_recvicmp)(connp, mp, NULL, ira);
4948 } else {
4949 ill_t *rill = ira->ira_rill;
4950
4951 BUMP_MIB(ill->ill_ip_mib, ipIfStatsHCInDelivers);
4952 ira->ira_ill = ira->ira_rill = NULL;
4953 /* Send it upstream */
4954 (connp->conn_recv)(connp, mp, NULL, ira);
4955 ira->ira_ill = ill;
4956 ira->ira_rill = rill;
4957 }
4958 }
4959
4960 /*
4961 * Handle protocols with which IP is less intimate. There
4962 * can be more than one stream bound to a particular
4963 * protocol. When this is the case, normally each one gets a copy
4964 * of any incoming packets.
4965 *
4966 * IPsec NOTE :
4967 *
4968 * Don't allow a secure packet going up a non-secure connection.
4969 * We don't allow this because
4970 *
4971 * 1) Reply might go out in clear which will be dropped at
4972 * the sending side.
4973 * 2) If the reply goes out in clear it will give the
4974 * adversary enough information for getting the key in
4975 * most of the cases.
4976 *
4977 * Moreover getting a secure packet when we expect clear
4978 * implies that SA's were added without checking for
4979 * policy on both ends. This should not happen once ISAKMP
4980 * is used to negotiate SAs as SAs will be added only after
4981 * verifying the policy.
4982 *
4983 * Zones notes:
4984 * Earlier in ip_input on a system with multiple shared-IP zones we
4985 * duplicate the multicast and broadcast packets and send them up
4986 * with each explicit zoneid that exists on that ill.
4987 * This means that here we can match the zoneid with SO_ALLZONES being special.
4988 */
4989 void
4990 ip_fanout_proto_v4(mblk_t *mp, ipha_t *ipha, ip_recv_attr_t *ira)
4991 {
4992 mblk_t *mp1;
4993 ipaddr_t laddr;
4994 conn_t *connp, *first_connp, *next_connp;
4995 connf_t *connfp;
4996 ill_t *ill = ira->ira_ill;
4997 ip_stack_t *ipst = ill->ill_ipst;
4998
4999 laddr = ipha->ipha_dst;
5000
5001 connfp = &ipst->ips_ipcl_proto_fanout_v4[ira->ira_protocol];
5002 mutex_enter(&connfp->connf_lock);
5003 connp = connfp->connf_head;
5004 for (connp = connfp->connf_head; connp != NULL;
5005 connp = connp->conn_next) {
5006 /* Note: IPCL_PROTO_MATCH includes conn_wantpacket */
5007 if (IPCL_PROTO_MATCH(connp, ira, ipha) &&
5008 (!(ira->ira_flags & IRAF_SYSTEM_LABELED) ||
5009 tsol_receive_local(mp, &laddr, IPV4_VERSION, ira, connp))) {
5010 break;
5011 }
5012 }
5013
5014 if (connp == NULL) {
5015 /*
5016 * No one bound to these addresses. Is
5017 * there a client that wants all
5018 * unclaimed datagrams?
5019 */
5020 mutex_exit(&connfp->connf_lock);
5021 ip_fanout_send_icmp_v4(mp, ICMP_DEST_UNREACHABLE,
5022 ICMP_PROTOCOL_UNREACHABLE, ira);
5023 return;
5024 }
5025
5026 ASSERT(IPCL_IS_NONSTR(connp) || connp->conn_rq != NULL);
5027
5028 CONN_INC_REF(connp);
5029 first_connp = connp;
5030 connp = connp->conn_next;
5031
5032 for (;;) {
5033 while (connp != NULL) {
5034 /* Note: IPCL_PROTO_MATCH includes conn_wantpacket */
5035 if (IPCL_PROTO_MATCH(connp, ira, ipha) &&
5036 (!(ira->ira_flags & IRAF_SYSTEM_LABELED) ||
5037 tsol_receive_local(mp, &laddr, IPV4_VERSION,
5038 ira, connp)))
5039 break;
5040 connp = connp->conn_next;
5041 }
5042
5043 if (connp == NULL) {
5044 /* No more interested clients */
5045 connp = first_connp;
5046 break;
5047 }
5048 if (((mp1 = dupmsg(mp)) == NULL) &&
5049 ((mp1 = copymsg(mp)) == NULL)) {
5050 /* Memory allocation failed */
5051 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
5052 ip_drop_input("ipIfStatsInDiscards", mp, ill);
5053 connp = first_connp;
5054 break;
5055 }
5056
5057 CONN_INC_REF(connp);
5058 mutex_exit(&connfp->connf_lock);
5059
5060 ip_fanout_proto_conn(connp, mp1, (ipha_t *)mp1->b_rptr, NULL,
5061 ira);
5062
5063 mutex_enter(&connfp->connf_lock);
5064 /* Follow the next pointer before releasing the conn. */
5065 next_connp = connp->conn_next;
5066 CONN_DEC_REF(connp);
5067 connp = next_connp;
5068 }
5069
5070 /* Last one. Send it upstream. */
5071 mutex_exit(&connfp->connf_lock);
5072
5073 ip_fanout_proto_conn(connp, mp, ipha, NULL, ira);
5074
5075 CONN_DEC_REF(connp);
5076 }
5077
5078 /*
5079 * If we have a IPsec NAT-Traversal packet, strip the zero-SPI or
5080 * pass it along to ESP if the SPI is non-zero. Returns the mblk if the mblk
5081 * is not consumed.
5082 *
5083 * One of three things can happen, all of which affect the passed-in mblk:
5084 *
5085 * 1.) The packet is stock UDP and gets its zero-SPI stripped. Return mblk..
5086 *
5087 * 2.) The packet is ESP-in-UDP, gets transformed into an equivalent
5088 * ESP packet, and is passed along to ESP for consumption. Return NULL.
5089 *
5090 * 3.) The packet is an ESP-in-UDP Keepalive. Drop it and return NULL.
5091 */
5092 mblk_t *
5093 zero_spi_check(mblk_t *mp, ip_recv_attr_t *ira)
5094 {
5095 int shift, plen, iph_len;
5096 ipha_t *ipha;
5097 udpha_t *udpha;
5098 uint32_t *spi;
5099 uint32_t esp_ports;
5100 uint8_t *orptr;
5101 ip_stack_t *ipst = ira->ira_ill->ill_ipst;
5102 ipsec_stack_t *ipss = ipst->ips_netstack->netstack_ipsec;
5103
5104 ipha = (ipha_t *)mp->b_rptr;
5105 iph_len = ira->ira_ip_hdr_length;
5106 plen = ira->ira_pktlen;
5107
5108 if (plen - iph_len - sizeof (udpha_t) < sizeof (uint32_t)) {
5109 /*
5110 * Most likely a keepalive for the benefit of an intervening
5111 * NAT. These aren't for us, per se, so drop it.
5112 *
5113 * RFC 3947/8 doesn't say for sure what to do for 2-3
5114 * byte packets (keepalives are 1-byte), but we'll drop them
5115 * also.
5116 */
5117 ip_drop_packet(mp, B_TRUE, ira->ira_ill,
5118 DROPPER(ipss, ipds_esp_nat_t_ka), &ipss->ipsec_dropper);
5119 return (NULL);
5120 }
5121
5122 if (MBLKL(mp) < iph_len + sizeof (udpha_t) + sizeof (*spi)) {
5123 /* might as well pull it all up - it might be ESP. */
5124 if (!pullupmsg(mp, -1)) {
5125 ip_drop_packet(mp, B_TRUE, ira->ira_ill,
5126 DROPPER(ipss, ipds_esp_nomem),
5127 &ipss->ipsec_dropper);
5128 return (NULL);
5129 }
5130
5131 ipha = (ipha_t *)mp->b_rptr;
5132 }
5133 spi = (uint32_t *)(mp->b_rptr + iph_len + sizeof (udpha_t));
5134 if (*spi == 0) {
5135 /* UDP packet - remove 0-spi. */
5136 shift = sizeof (uint32_t);
5137 } else {
5138 /* ESP-in-UDP packet - reduce to ESP. */
5139 ipha->ipha_protocol = IPPROTO_ESP;
5140 shift = sizeof (udpha_t);
5141 }
5142
5143 /* Fix IP header */
5144 ira->ira_pktlen = (plen - shift);
5145 ipha->ipha_length = htons(ira->ira_pktlen);
5146 ipha->ipha_hdr_checksum = 0;
5147
5148 orptr = mp->b_rptr;
5149 mp->b_rptr += shift;
5150
5151 udpha = (udpha_t *)(orptr + iph_len);
5152 if (*spi == 0) {
5153 ASSERT((uint8_t *)ipha == orptr);
5154 udpha->uha_length = htons(plen - shift - iph_len);
5155 iph_len += sizeof (udpha_t); /* For the call to ovbcopy(). */
5156 esp_ports = 0;
5157 } else {
5158 esp_ports = *((uint32_t *)udpha);
5159 ASSERT(esp_ports != 0);
5160 }
5161 ovbcopy(orptr, orptr + shift, iph_len);
5162 if (esp_ports != 0) /* Punt up for ESP processing. */ {
5163 ipha = (ipha_t *)(orptr + shift);
5164
5165 ira->ira_flags |= IRAF_ESP_UDP_PORTS;
5166 ira->ira_esp_udp_ports = esp_ports;
5167 ip_fanout_v4(mp, ipha, ira);
5168 return (NULL);
5169 }
5170 return (mp);
5171 }
5172
5173 /*
5174 * Deliver a udp packet to the given conn, possibly applying ipsec policy.
5175 * Handles IPv4 and IPv6.
5176 * We are responsible for disposing of mp, such as by freemsg() or putnext()
5177 * Caller is responsible for dropping references to the conn.
5178 */
5179 void
5180 ip_fanout_udp_conn(conn_t *connp, mblk_t *mp, ipha_t *ipha, ip6_t *ip6h,
5181 ip_recv_attr_t *ira)
5182 {
5183 ill_t *ill = ira->ira_ill;
5184 ip_stack_t *ipst = ill->ill_ipst;
5185 ipsec_stack_t *ipss = ipst->ips_netstack->netstack_ipsec;
5186 boolean_t secure;
5187 iaflags_t iraflags = ira->ira_flags;
5188
5189 secure = iraflags & IRAF_IPSEC_SECURE;
5190
5191 if (IPCL_IS_NONSTR(connp) ? connp->conn_flow_cntrld :
5192 !canputnext(connp->conn_rq)) {
5193 BUMP_MIB(ill->ill_ip_mib, udpIfStatsInOverflows);
5194 freemsg(mp);
5195 return;
5196 }
5197
5198 if (((iraflags & IRAF_IS_IPV4) ?
5199 CONN_INBOUND_POLICY_PRESENT(connp, ipss) :
5200 CONN_INBOUND_POLICY_PRESENT_V6(connp, ipss)) ||
5201 secure) {
5202 mp = ipsec_check_inbound_policy(mp, connp, ipha,
5203 ip6h, ira);
5204 if (mp == NULL) {
5205 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
5206 /* Note that mp is NULL */
5207 ip_drop_input("ipIfStatsInDiscards", mp, ill);
5208 return;
5209 }
5210 }
5211
5212 /*
5213 * Since this code is not used for UDP unicast we don't need a NAT_T
5214 * check. Only ip_fanout_v4 has that check.
5215 */
5216 if (ira->ira_flags & IRAF_ICMP_ERROR) {
5217 (connp->conn_recvicmp)(connp, mp, NULL, ira);
5218 } else {
5219 ill_t *rill = ira->ira_rill;
5220
5221 BUMP_MIB(ill->ill_ip_mib, ipIfStatsHCInDelivers);
5222 ira->ira_ill = ira->ira_rill = NULL;
5223 /* Send it upstream */
5224 (connp->conn_recv)(connp, mp, NULL, ira);
5225 ira->ira_ill = ill;
5226 ira->ira_rill = rill;
5227 }
5228 }
5229
5230 /*
5231 * Fanout for UDP packets that are multicast or broadcast, and ICMP errors.
5232 * (Unicast fanout is handled in ip_input_v4.)
5233 *
5234 * If SO_REUSEADDR is set all multicast and broadcast packets
5235 * will be delivered to all conns bound to the same port.
5236 *
5237 * If there is at least one matching AF_INET receiver, then we will
5238 * ignore any AF_INET6 receivers.
5239 * In the special case where an AF_INET socket binds to 0.0.0.0/<port> and an
5240 * AF_INET6 socket binds to ::/<port>, only the AF_INET socket receives the IPv4
5241 * packets.
5242 *
5243 * Zones notes:
5244 * Earlier in ip_input on a system with multiple shared-IP zones we
5245 * duplicate the multicast and broadcast packets and send them up
5246 * with each explicit zoneid that exists on that ill.
5247 * This means that here we can match the zoneid with SO_ALLZONES being special.
5248 */
5249 void
5250 ip_fanout_udp_multi_v4(mblk_t *mp, ipha_t *ipha, uint16_t lport, uint16_t fport,
5251 ip_recv_attr_t *ira)
5252 {
5253 ipaddr_t laddr;
5254 in6_addr_t v6faddr;
5255 conn_t *connp;
5256 connf_t *connfp;
5257 ipaddr_t faddr;
5258 ill_t *ill = ira->ira_ill;
5259 ip_stack_t *ipst = ill->ill_ipst;
5260
5261 ASSERT(ira->ira_flags & (IRAF_MULTIBROADCAST|IRAF_ICMP_ERROR));
5262
5263 laddr = ipha->ipha_dst;
5264 faddr = ipha->ipha_src;
5265
5266 connfp = &ipst->ips_ipcl_udp_fanout[IPCL_UDP_HASH(lport, ipst)];
5267 mutex_enter(&connfp->connf_lock);
5268 connp = connfp->connf_head;
5269
5270 /*
5271 * If SO_REUSEADDR has been set on the first we send the
5272 * packet to all clients that have joined the group and
5273 * match the port.
5274 */
5275 while (connp != NULL) {
5276 if ((IPCL_UDP_MATCH(connp, lport, laddr, fport, faddr)) &&
5277 conn_wantpacket(connp, ira, ipha) &&
5278 (!(ira->ira_flags & IRAF_SYSTEM_LABELED) ||
5279 tsol_receive_local(mp, &laddr, IPV4_VERSION, ira, connp)))
5280 break;
5281 connp = connp->conn_next;
5282 }
5283
5284 if (connp == NULL)
5285 goto notfound;
5286
5287 CONN_INC_REF(connp);
5288
5289 if (connp->conn_reuseaddr) {
5290 conn_t *first_connp = connp;
5291 conn_t *next_connp;
5292 mblk_t *mp1;
5293
5294 connp = connp->conn_next;
5295 for (;;) {
5296 while (connp != NULL) {
5297 if (IPCL_UDP_MATCH(connp, lport, laddr,
5298 fport, faddr) &&
5299 conn_wantpacket(connp, ira, ipha) &&
5300 (!(ira->ira_flags & IRAF_SYSTEM_LABELED) ||
5301 tsol_receive_local(mp, &laddr, IPV4_VERSION,
5302 ira, connp)))
5303 break;
5304 connp = connp->conn_next;
5305 }
5306 if (connp == NULL) {
5307 /* No more interested clients */
5308 connp = first_connp;
5309 break;
5310 }
5311 if (((mp1 = dupmsg(mp)) == NULL) &&
5312 ((mp1 = copymsg(mp)) == NULL)) {
5313 /* Memory allocation failed */
5314 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
5315 ip_drop_input("ipIfStatsInDiscards", mp, ill);
5316 connp = first_connp;
5317 break;
5318 }
5319 CONN_INC_REF(connp);
5320 mutex_exit(&connfp->connf_lock);
5321
5322 IP_STAT(ipst, ip_udp_fanmb);
5323 ip_fanout_udp_conn(connp, mp1, (ipha_t *)mp1->b_rptr,
5324 NULL, ira);
5325 mutex_enter(&connfp->connf_lock);
5326 /* Follow the next pointer before releasing the conn */
5327 next_connp = connp->conn_next;
5328 CONN_DEC_REF(connp);
5329 connp = next_connp;
5330 }
5331 }
5332
5333 /* Last one. Send it upstream. */
5334 mutex_exit(&connfp->connf_lock);
5335 IP_STAT(ipst, ip_udp_fanmb);
5336 ip_fanout_udp_conn(connp, mp, ipha, NULL, ira);
5337 CONN_DEC_REF(connp);
5338 return;
5339
5340 notfound:
5341 mutex_exit(&connfp->connf_lock);
5342 /*
5343 * IPv6 endpoints bound to multicast IPv4-mapped addresses
5344 * have already been matched above, since they live in the IPv4
5345 * fanout tables. This implies we only need to
5346 * check for IPv6 in6addr_any endpoints here.
5347 * Thus we compare using ipv6_all_zeros instead of the destination
5348 * address, except for the multicast group membership lookup which
5349 * uses the IPv4 destination.
5350 */
5351 IN6_IPADDR_TO_V4MAPPED(ipha->ipha_src, &v6faddr);
5352 connfp = &ipst->ips_ipcl_udp_fanout[IPCL_UDP_HASH(lport, ipst)];
5353 mutex_enter(&connfp->connf_lock);
5354 connp = connfp->connf_head;
5355 /*
5356 * IPv4 multicast packet being delivered to an AF_INET6
5357 * in6addr_any endpoint.
5358 * Need to check conn_wantpacket(). Note that we use conn_wantpacket()
5359 * and not conn_wantpacket_v6() since any multicast membership is
5360 * for an IPv4-mapped multicast address.
5361 */
5362 while (connp != NULL) {
5363 if (IPCL_UDP_MATCH_V6(connp, lport, ipv6_all_zeros,
5364 fport, v6faddr) &&
5365 conn_wantpacket(connp, ira, ipha) &&
5366 (!(ira->ira_flags & IRAF_SYSTEM_LABELED) ||
5367 tsol_receive_local(mp, &laddr, IPV4_VERSION, ira, connp)))
5368 break;
5369 connp = connp->conn_next;
5370 }
5371
5372 if (connp == NULL) {
5373 /*
5374 * No one bound to this port. Is
5375 * there a client that wants all
5376 * unclaimed datagrams?
5377 */
5378 mutex_exit(&connfp->connf_lock);
5379
5380 if (ipst->ips_ipcl_proto_fanout_v4[IPPROTO_UDP].connf_head !=
5381 NULL) {
5382 ASSERT(ira->ira_protocol == IPPROTO_UDP);
5383 ip_fanout_proto_v4(mp, ipha, ira);
5384 } else {
5385 /*
5386 * We used to attempt to send an icmp error here, but
5387 * since this is known to be a multicast packet
5388 * and we don't send icmp errors in response to
5389 * multicast, just drop the packet and give up sooner.
5390 */
5391 BUMP_MIB(ill->ill_ip_mib, udpIfStatsNoPorts);
5392 freemsg(mp);
5393 }
5394 return;
5395 }
5396 ASSERT(IPCL_IS_NONSTR(connp) || connp->conn_rq != NULL);
5397
5398 /*
5399 * If SO_REUSEADDR has been set on the first we send the
5400 * packet to all clients that have joined the group and
5401 * match the port.
5402 */
5403 if (connp->conn_reuseaddr) {
5404 conn_t *first_connp = connp;
5405 conn_t *next_connp;
5406 mblk_t *mp1;
5407
5408 CONN_INC_REF(connp);
5409 connp = connp->conn_next;
5410 for (;;) {
5411 while (connp != NULL) {
5412 if (IPCL_UDP_MATCH_V6(connp, lport,
5413 ipv6_all_zeros, fport, v6faddr) &&
5414 conn_wantpacket(connp, ira, ipha) &&
5415 (!(ira->ira_flags & IRAF_SYSTEM_LABELED) ||
5416 tsol_receive_local(mp, &laddr, IPV4_VERSION,
5417 ira, connp)))
5418 break;
5419 connp = connp->conn_next;
5420 }
5421 if (connp == NULL) {
5422 /* No more interested clients */
5423 connp = first_connp;
5424 break;
5425 }
5426 if (((mp1 = dupmsg(mp)) == NULL) &&
5427 ((mp1 = copymsg(mp)) == NULL)) {
5428 /* Memory allocation failed */
5429 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
5430 ip_drop_input("ipIfStatsInDiscards", mp, ill);
5431 connp = first_connp;
5432 break;
5433 }
5434 CONN_INC_REF(connp);
5435 mutex_exit(&connfp->connf_lock);
5436
5437 IP_STAT(ipst, ip_udp_fanmb);
5438 ip_fanout_udp_conn(connp, mp1, (ipha_t *)mp1->b_rptr,
5439 NULL, ira);
5440 mutex_enter(&connfp->connf_lock);
5441 /* Follow the next pointer before releasing the conn */
5442 next_connp = connp->conn_next;
5443 CONN_DEC_REF(connp);
5444 connp = next_connp;
5445 }
5446 }
5447
5448 /* Last one. Send it upstream. */
5449 mutex_exit(&connfp->connf_lock);
5450 IP_STAT(ipst, ip_udp_fanmb);
5451 ip_fanout_udp_conn(connp, mp, ipha, NULL, ira);
5452 CONN_DEC_REF(connp);
5453 }
5454
5455 /*
5456 * Split an incoming packet's IPv4 options into the label and the other options.
5457 * If 'allocate' is set it does memory allocation for the ip_pkt_t, including
5458 * clearing out any leftover label or options.
5459 * Otherwise it just makes ipp point into the packet.
5460 *
5461 * Returns zero if ok; ENOMEM if the buffer couldn't be allocated.
5462 */
5463 int
5464 ip_find_hdr_v4(ipha_t *ipha, ip_pkt_t *ipp, boolean_t allocate)
5465 {
5466 uchar_t *opt;
5467 uint32_t totallen;
5468 uint32_t optval;
5469 uint32_t optlen;
5470
5471 ipp->ipp_fields |= IPPF_HOPLIMIT | IPPF_TCLASS | IPPF_ADDR;
5472 ipp->ipp_hoplimit = ipha->ipha_ttl;
5473 ipp->ipp_type_of_service = ipha->ipha_type_of_service;
5474 IN6_IPADDR_TO_V4MAPPED(ipha->ipha_dst, &ipp->ipp_addr);
5475
5476 /*
5477 * Get length (in 4 byte octets) of IP header options.
5478 */
5479 totallen = ipha->ipha_version_and_hdr_length -
5480 (uint8_t)((IP_VERSION << 4) + IP_SIMPLE_HDR_LENGTH_IN_WORDS);
5481
5482 if (totallen == 0) {
5483 if (!allocate)
5484 return (0);
5485
5486 /* Clear out anything from a previous packet */
5487 if (ipp->ipp_fields & IPPF_IPV4_OPTIONS) {
5488 kmem_free(ipp->ipp_ipv4_options,
5489 ipp->ipp_ipv4_options_len);
5490 ipp->ipp_ipv4_options = NULL;
5491 ipp->ipp_ipv4_options_len = 0;
5492 ipp->ipp_fields &= ~IPPF_IPV4_OPTIONS;
5493 }
5494 if (ipp->ipp_fields & IPPF_LABEL_V4) {
5495 kmem_free(ipp->ipp_label_v4, ipp->ipp_label_len_v4);
5496 ipp->ipp_label_v4 = NULL;
5497 ipp->ipp_label_len_v4 = 0;
5498 ipp->ipp_fields &= ~IPPF_LABEL_V4;
5499 }
5500 return (0);
5501 }
5502
5503 totallen <<= 2;
5504 opt = (uchar_t *)&ipha[1];
5505 if (!is_system_labeled()) {
5506
5507 copyall:
5508 if (!allocate) {
5509 if (totallen != 0) {
5510 ipp->ipp_ipv4_options = opt;
5511 ipp->ipp_ipv4_options_len = totallen;
5512 ipp->ipp_fields |= IPPF_IPV4_OPTIONS;
5513 }
5514 return (0);
5515 }
5516 /* Just copy all of options */
5517 if (ipp->ipp_fields & IPPF_IPV4_OPTIONS) {
5518 if (totallen == ipp->ipp_ipv4_options_len) {
5519 bcopy(opt, ipp->ipp_ipv4_options, totallen);
5520 return (0);
5521 }
5522 kmem_free(ipp->ipp_ipv4_options,
5523 ipp->ipp_ipv4_options_len);
5524 ipp->ipp_ipv4_options = NULL;
5525 ipp->ipp_ipv4_options_len = 0;
5526 ipp->ipp_fields &= ~IPPF_IPV4_OPTIONS;
5527 }
5528 if (totallen == 0)
5529 return (0);
5530
5531 ipp->ipp_ipv4_options = kmem_alloc(totallen, KM_NOSLEEP);
5532 if (ipp->ipp_ipv4_options == NULL)
5533 return (ENOMEM);
5534 ipp->ipp_ipv4_options_len = totallen;
5535 ipp->ipp_fields |= IPPF_IPV4_OPTIONS;
5536 bcopy(opt, ipp->ipp_ipv4_options, totallen);
5537 return (0);
5538 }
5539
5540 if (allocate && (ipp->ipp_fields & IPPF_LABEL_V4)) {
5541 kmem_free(ipp->ipp_label_v4, ipp->ipp_label_len_v4);
5542 ipp->ipp_label_v4 = NULL;
5543 ipp->ipp_label_len_v4 = 0;
5544 ipp->ipp_fields &= ~IPPF_LABEL_V4;
5545 }
5546
5547 /*
5548 * Search for CIPSO option.
5549 * We assume CIPSO is first in options if it is present.
5550 * If it isn't, then ipp_opt_ipv4_options will not include the options
5551 * prior to the CIPSO option.
5552 */
5553 while (totallen != 0) {
5554 switch (optval = opt[IPOPT_OPTVAL]) {
5555 case IPOPT_EOL:
5556 return (0);
5557 case IPOPT_NOP:
5558 optlen = 1;
5559 break;
5560 default:
5561 if (totallen <= IPOPT_OLEN)
5562 return (EINVAL);
5563 optlen = opt[IPOPT_OLEN];
5564 if (optlen < 2)
5565 return (EINVAL);
5566 }
5567 if (optlen > totallen)
5568 return (EINVAL);
5569
5570 switch (optval) {
5571 case IPOPT_COMSEC:
5572 if (!allocate) {
5573 ipp->ipp_label_v4 = opt;
5574 ipp->ipp_label_len_v4 = optlen;
5575 ipp->ipp_fields |= IPPF_LABEL_V4;
5576 } else {
5577 ipp->ipp_label_v4 = kmem_alloc(optlen,
5578 KM_NOSLEEP);
5579 if (ipp->ipp_label_v4 == NULL)
5580 return (ENOMEM);
5581 ipp->ipp_label_len_v4 = optlen;
5582 ipp->ipp_fields |= IPPF_LABEL_V4;
5583 bcopy(opt, ipp->ipp_label_v4, optlen);
5584 }
5585 totallen -= optlen;
5586 opt += optlen;
5587
5588 /* Skip padding bytes until we get to a multiple of 4 */
5589 while ((totallen & 3) != 0 && opt[0] == IPOPT_NOP) {
5590 totallen--;
5591 opt++;
5592 }
5593 /* Remaining as ipp_ipv4_options */
5594 goto copyall;
5595 }
5596 totallen -= optlen;
5597 opt += optlen;
5598 }
5599 /* No CIPSO found; return everything as ipp_ipv4_options */
5600 totallen = ipha->ipha_version_and_hdr_length -
5601 (uint8_t)((IP_VERSION << 4) + IP_SIMPLE_HDR_LENGTH_IN_WORDS);
5602 totallen <<= 2;
5603 opt = (uchar_t *)&ipha[1];
5604 goto copyall;
5605 }
5606
5607 /*
5608 * Efficient versions of lookup for an IRE when we only
5609 * match the address.
5610 * For RTF_REJECT or BLACKHOLE we return IRE_NOROUTE.
5611 * Does not handle multicast addresses.
5612 */
5613 uint_t
5614 ip_type_v4(ipaddr_t addr, ip_stack_t *ipst)
5615 {
5616 ire_t *ire;
5617 uint_t result;
5618
5619 ire = ire_ftable_lookup_simple_v4(addr, 0, ipst, NULL);
5620 ASSERT(ire != NULL);
5621 if (ire->ire_flags & (RTF_REJECT|RTF_BLACKHOLE))
5622 result = IRE_NOROUTE;
5623 else
5624 result = ire->ire_type;
5625 ire_refrele(ire);
5626 return (result);
5627 }
5628
5629 /*
5630 * Efficient versions of lookup for an IRE when we only
5631 * match the address.
5632 * For RTF_REJECT or BLACKHOLE we return IRE_NOROUTE.
5633 * Does not handle multicast addresses.
5634 */
5635 uint_t
5636 ip_type_v6(const in6_addr_t *addr, ip_stack_t *ipst)
5637 {
5638 ire_t *ire;
5639 uint_t result;
5640
5641 ire = ire_ftable_lookup_simple_v6(addr, 0, ipst, NULL);
5642 ASSERT(ire != NULL);
5643 if (ire->ire_flags & (RTF_REJECT|RTF_BLACKHOLE))
5644 result = IRE_NOROUTE;
5645 else
5646 result = ire->ire_type;
5647 ire_refrele(ire);
5648 return (result);
5649 }
5650
5651 /*
5652 * Nobody should be sending
5653 * packets up this stream
5654 */
5655 static void
5656 ip_lrput(queue_t *q, mblk_t *mp)
5657 {
5658 switch (mp->b_datap->db_type) {
5659 case M_FLUSH:
5660 /* Turn around */
5661 if (*mp->b_rptr & FLUSHW) {
5662 *mp->b_rptr &= ~FLUSHR;
5663 qreply(q, mp);
5664 return;
5665 }
5666 break;
5667 }
5668 freemsg(mp);
5669 }
5670
5671 /* Nobody should be sending packets down this stream */
5672 /* ARGSUSED */
5673 void
5674 ip_lwput(queue_t *q, mblk_t *mp)
5675 {
5676 freemsg(mp);
5677 }
5678
5679 /*
5680 * Move the first hop in any source route to ipha_dst and remove that part of
5681 * the source route. Called by other protocols. Errors in option formatting
5682 * are ignored - will be handled by ip_output_options. Return the final
5683 * destination (either ipha_dst or the last entry in a source route.)
5684 */
5685 ipaddr_t
5686 ip_massage_options(ipha_t *ipha, netstack_t *ns)
5687 {
5688 ipoptp_t opts;
5689 uchar_t *opt;
5690 uint8_t optval;
5691 uint8_t optlen;
5692 ipaddr_t dst;
5693 int i;
5694 ip_stack_t *ipst = ns->netstack_ip;
5695
5696 ip2dbg(("ip_massage_options\n"));
5697 dst = ipha->ipha_dst;
5698 for (optval = ipoptp_first(&opts, ipha);
5699 optval != IPOPT_EOL;
5700 optval = ipoptp_next(&opts)) {
5701 opt = opts.ipoptp_cur;
5702 switch (optval) {
5703 uint8_t off;
5704 case IPOPT_SSRR:
5705 case IPOPT_LSRR:
5706 if ((opts.ipoptp_flags & IPOPTP_ERROR) != 0) {
5707 ip1dbg(("ip_massage_options: bad src route\n"));
5708 break;
5709 }
5710 optlen = opts.ipoptp_len;
5711 off = opt[IPOPT_OFFSET];
5712 off--;
5713 redo_srr:
5714 if (optlen < IP_ADDR_LEN ||
5715 off > optlen - IP_ADDR_LEN) {
5716 /* End of source route */
5717 ip1dbg(("ip_massage_options: end of SR\n"));
5718 break;
5719 }
5720 bcopy((char *)opt + off, &dst, IP_ADDR_LEN);
5721 ip1dbg(("ip_massage_options: next hop 0x%x\n",
5722 ntohl(dst)));
5723 /*
5724 * Check if our address is present more than
5725 * once as consecutive hops in source route.
5726 * XXX verify per-interface ip_forwarding
5727 * for source route?
5728 */
5729 if (ip_type_v4(dst, ipst) == IRE_LOCAL) {
5730 off += IP_ADDR_LEN;
5731 goto redo_srr;
5732 }
5733 if (dst == htonl(INADDR_LOOPBACK)) {
5734 ip1dbg(("ip_massage_options: loopback addr in "
5735 "source route!\n"));
5736 break;
5737 }
5738 /*
5739 * Update ipha_dst to be the first hop and remove the
5740 * first hop from the source route (by overwriting
5741 * part of the option with NOP options).
5742 */
5743 ipha->ipha_dst = dst;
5744 /* Put the last entry in dst */
5745 off = ((optlen - IP_ADDR_LEN - 3) & ~(IP_ADDR_LEN-1)) +
5746 3;
5747 bcopy(&opt[off], &dst, IP_ADDR_LEN);
5748
5749 ip1dbg(("ip_massage_options: last hop 0x%x\n",
5750 ntohl(dst)));
5751 /* Move down and overwrite */
5752 opt[IP_ADDR_LEN] = opt[0];
5753 opt[IP_ADDR_LEN+1] = opt[IPOPT_OLEN] - IP_ADDR_LEN;
5754 opt[IP_ADDR_LEN+2] = opt[IPOPT_OFFSET];
5755 for (i = 0; i < IP_ADDR_LEN; i++)
5756 opt[i] = IPOPT_NOP;
5757 break;
5758 }
5759 }
5760 return (dst);
5761 }
5762
5763 /*
5764 * Return the network mask
5765 * associated with the specified address.
5766 */
5767 ipaddr_t
5768 ip_net_mask(ipaddr_t addr)
5769 {
5770 uchar_t *up = (uchar_t *)&addr;
5771 ipaddr_t mask = 0;
5772 uchar_t *maskp = (uchar_t *)&mask;
5773
5774 #if defined(__i386) || defined(__amd64)
5775 #define TOTALLY_BRAIN_DAMAGED_C_COMPILER
5776 #endif
5777 #ifdef TOTALLY_BRAIN_DAMAGED_C_COMPILER
5778 maskp[0] = maskp[1] = maskp[2] = maskp[3] = 0;
5779 #endif
5780 if (CLASSD(addr)) {
5781 maskp[0] = 0xF0;
5782 return (mask);
5783 }
5784
5785 /* We assume Class E default netmask to be 32 */
5786 if (CLASSE(addr))
5787 return (0xffffffffU);
5788
5789 if (addr == 0)
5790 return (0);
5791 maskp[0] = 0xFF;
5792 if ((up[0] & 0x80) == 0)
5793 return (mask);
5794
5795 maskp[1] = 0xFF;
5796 if ((up[0] & 0xC0) == 0x80)
5797 return (mask);
5798
5799 maskp[2] = 0xFF;
5800 if ((up[0] & 0xE0) == 0xC0)
5801 return (mask);
5802
5803 /* Otherwise return no mask */
5804 return ((ipaddr_t)0);
5805 }
5806
5807 /* Name/Value Table Lookup Routine */
5808 char *
5809 ip_nv_lookup(nv_t *nv, int value)
5810 {
5811 if (!nv)
5812 return (NULL);
5813 for (; nv->nv_name; nv++) {
5814 if (nv->nv_value == value)
5815 return (nv->nv_name);
5816 }
5817 return ("unknown");
5818 }
5819
5820 static int
5821 ip_wait_for_info_ack(ill_t *ill)
5822 {
5823 int err;
5824
5825 mutex_enter(&ill->ill_lock);
5826 while (ill->ill_state_flags & ILL_LL_SUBNET_PENDING) {
5827 /*
5828 * Return value of 0 indicates a pending signal.
5829 */
5830 err = cv_wait_sig(&ill->ill_cv, &ill->ill_lock);
5831 if (err == 0) {
5832 mutex_exit(&ill->ill_lock);
5833 return (EINTR);
5834 }
5835 }
5836 mutex_exit(&ill->ill_lock);
5837 /*
5838 * ip_rput_other could have set an error in ill_error on
5839 * receipt of M_ERROR.
5840 */
5841 return (ill->ill_error);
5842 }
5843
5844 /*
5845 * This is a module open, i.e. this is a control stream for access
5846 * to a DLPI device. We allocate an ill_t as the instance data in
5847 * this case.
5848 */
5849 static int
5850 ip_modopen(queue_t *q, dev_t *devp, int flag, int sflag, cred_t *credp)
5851 {
5852 ill_t *ill;
5853 int err;
5854 zoneid_t zoneid;
5855 netstack_t *ns;
5856 ip_stack_t *ipst;
5857
5858 /*
5859 * Prevent unprivileged processes from pushing IP so that
5860 * they can't send raw IP.
5861 */
5862 if (secpolicy_net_rawaccess(credp) != 0)
5863 return (EPERM);
5864
5865 ns = netstack_find_by_cred(credp);
5866 ASSERT(ns != NULL);
5867 ipst = ns->netstack_ip;
5868 ASSERT(ipst != NULL);
5869
5870 /*
5871 * For exclusive stacks we set the zoneid to zero
5872 * to make IP operate as if in the global zone.
5873 */
5874 if (ipst->ips_netstack->netstack_stackid != GLOBAL_NETSTACKID)
5875 zoneid = GLOBAL_ZONEID;
5876 else
5877 zoneid = crgetzoneid(credp);
5878
5879 ill = (ill_t *)mi_open_alloc_sleep(sizeof (ill_t));
5880 q->q_ptr = WR(q)->q_ptr = ill;
5881 ill->ill_ipst = ipst;
5882 ill->ill_zoneid = zoneid;
5883
5884 /*
5885 * ill_init initializes the ill fields and then sends down
5886 * down a DL_INFO_REQ after calling qprocson.
5887 */
5888 err = ill_init(q, ill);
5889
5890 if (err != 0) {
5891 mi_free(ill);
5892 netstack_rele(ipst->ips_netstack);
5893 q->q_ptr = NULL;
5894 WR(q)->q_ptr = NULL;
5895 return (err);
5896 }
5897
5898 /*
5899 * Wait for the DL_INFO_ACK if a DL_INFO_REQ was sent.
5900 *
5901 * ill_init initializes the ipsq marking this thread as
5902 * writer
5903 */
5904 ipsq_exit(ill->ill_phyint->phyint_ipsq);
5905 err = ip_wait_for_info_ack(ill);
5906 if (err == 0)
5907 ill->ill_credp = credp;
5908 else
5909 goto fail;
5910
5911 crhold(credp);
5912
5913 mutex_enter(&ipst->ips_ip_mi_lock);
5914 err = mi_open_link(&ipst->ips_ip_g_head, (IDP)q->q_ptr, devp, flag,
5915 sflag, credp);
5916 mutex_exit(&ipst->ips_ip_mi_lock);
5917 fail:
5918 if (err) {
5919 (void) ip_close(q, 0);
5920 return (err);
5921 }
5922 return (0);
5923 }
5924
5925 /* For /dev/ip aka AF_INET open */
5926 int
5927 ip_openv4(queue_t *q, dev_t *devp, int flag, int sflag, cred_t *credp)
5928 {
5929 return (ip_open(q, devp, flag, sflag, credp, B_FALSE));
5930 }
5931
5932 /* For /dev/ip6 aka AF_INET6 open */
5933 int
5934 ip_openv6(queue_t *q, dev_t *devp, int flag, int sflag, cred_t *credp)
5935 {
5936 return (ip_open(q, devp, flag, sflag, credp, B_TRUE));
5937 }
5938
5939 /* IP open routine. */
5940 int
5941 ip_open(queue_t *q, dev_t *devp, int flag, int sflag, cred_t *credp,
5942 boolean_t isv6)
5943 {
5944 conn_t *connp;
5945 major_t maj;
5946 zoneid_t zoneid;
5947 netstack_t *ns;
5948 ip_stack_t *ipst;
5949
5950 /* Allow reopen. */
5951 if (q->q_ptr != NULL)
5952 return (0);
5953
5954 if (sflag & MODOPEN) {
5955 /* This is a module open */
5956 return (ip_modopen(q, devp, flag, sflag, credp));
5957 }
5958
5959 if ((flag & ~(FKLYR)) == IP_HELPER_STR) {
5960 /*
5961 * Non streams based socket looking for a stream
5962 * to access IP
5963 */
5964 return (ip_helper_stream_setup(q, devp, flag, sflag,
5965 credp, isv6));
5966 }
5967
5968 ns = netstack_find_by_cred(credp);
5969 ASSERT(ns != NULL);
5970 ipst = ns->netstack_ip;
5971 ASSERT(ipst != NULL);
5972
5973 /*
5974 * For exclusive stacks we set the zoneid to zero
5975 * to make IP operate as if in the global zone.
5976 */
5977 if (ipst->ips_netstack->netstack_stackid != GLOBAL_NETSTACKID)
5978 zoneid = GLOBAL_ZONEID;
5979 else
5980 zoneid = crgetzoneid(credp);
5981
5982 /*
5983 * We are opening as a device. This is an IP client stream, and we
5984 * allocate an conn_t as the instance data.
5985 */
5986 connp = ipcl_conn_create(IPCL_IPCCONN, KM_SLEEP, ipst->ips_netstack);
5987
5988 /*
5989 * ipcl_conn_create did a netstack_hold. Undo the hold that was
5990 * done by netstack_find_by_cred()
5991 */
5992 netstack_rele(ipst->ips_netstack);
5993
5994 connp->conn_ixa->ixa_flags |= IXAF_MULTICAST_LOOP | IXAF_SET_ULP_CKSUM;
5995 /* conn_allzones can not be set this early, hence no IPCL_ZONEID */
5996 connp->conn_ixa->ixa_zoneid = zoneid;
5997 connp->conn_zoneid = zoneid;
5998
5999 connp->conn_rq = q;
6000 q->q_ptr = WR(q)->q_ptr = connp;
6001
6002 /* Minor tells us which /dev entry was opened */
6003 if (isv6) {
6004 connp->conn_family = AF_INET6;
6005 connp->conn_ipversion = IPV6_VERSION;
6006 connp->conn_ixa->ixa_flags &= ~IXAF_IS_IPV4;
6007 connp->conn_ixa->ixa_src_preferences = IPV6_PREFER_SRC_DEFAULT;
6008 } else {
6009 connp->conn_family = AF_INET;
6010 connp->conn_ipversion = IPV4_VERSION;
6011 connp->conn_ixa->ixa_flags |= IXAF_IS_IPV4;
6012 }
6013
6014 if ((ip_minor_arena_la != NULL) && (flag & SO_SOCKSTR) &&
6015 ((connp->conn_dev = inet_minor_alloc(ip_minor_arena_la)) != 0)) {
6016 connp->conn_minor_arena = ip_minor_arena_la;
6017 } else {
6018 /*
6019 * Either minor numbers in the large arena were exhausted
6020 * or a non socket application is doing the open.
6021 * Try to allocate from the small arena.
6022 */
6023 if ((connp->conn_dev =
6024 inet_minor_alloc(ip_minor_arena_sa)) == 0) {
6025 /* CONN_DEC_REF takes care of netstack_rele() */
6026 q->q_ptr = WR(q)->q_ptr = NULL;
6027 CONN_DEC_REF(connp);
6028 return (EBUSY);
6029 }
6030 connp->conn_minor_arena = ip_minor_arena_sa;
6031 }
6032
6033 maj = getemajor(*devp);
6034 *devp = makedevice(maj, (minor_t)connp->conn_dev);
6035
6036 /*
6037 * connp->conn_cred is crfree()ed in ipcl_conn_destroy()
6038 */
6039 connp->conn_cred = credp;
6040 connp->conn_cpid = curproc->p_pid;
6041 /* Cache things in ixa without an extra refhold */
6042 ASSERT(!(connp->conn_ixa->ixa_free_flags & IXA_FREE_CRED));
6043 connp->conn_ixa->ixa_cred = connp->conn_cred;
6044 connp->conn_ixa->ixa_cpid = connp->conn_cpid;
6045 if (is_system_labeled())
6046 connp->conn_ixa->ixa_tsl = crgetlabel(connp->conn_cred);
6047
6048 /*
6049 * Handle IP_IOC_RTS_REQUEST and other ioctls which use conn_recv
6050 */
6051 connp->conn_recv = ip_conn_input;
6052 connp->conn_recvicmp = ip_conn_input_icmp;
6053
6054 crhold(connp->conn_cred);
6055
6056 /*
6057 * If the caller has the process-wide flag set, then default to MAC
6058 * exempt mode. This allows read-down to unlabeled hosts.
6059 */
6060 if (getpflags(NET_MAC_AWARE, credp) != 0)
6061 connp->conn_mac_mode = CONN_MAC_AWARE;
6062
6063 connp->conn_zone_is_global = (crgetzoneid(credp) == GLOBAL_ZONEID);
6064
6065 connp->conn_rq = q;
6066 connp->conn_wq = WR(q);
6067
6068 /* Non-zero default values */
6069 connp->conn_ixa->ixa_flags |= IXAF_MULTICAST_LOOP;
6070
6071 /*
6072 * Make the conn globally visible to walkers
6073 */
6074 ASSERT(connp->conn_ref == 1);
6075 mutex_enter(&connp->conn_lock);
6076 connp->conn_state_flags &= ~CONN_INCIPIENT;
6077 mutex_exit(&connp->conn_lock);
6078
6079 qprocson(q);
6080
6081 return (0);
6082 }
6083
6084 /*
6085 * Set IPsec policy from an ipsec_req_t. If the req is not "zero" and valid,
6086 * all of them are copied to the conn_t. If the req is "zero", the policy is
6087 * zeroed out. A "zero" policy has zero ipsr_{ah,req,self_encap}_req
6088 * fields.
6089 * We keep only the latest setting of the policy and thus policy setting
6090 * is not incremental/cumulative.
6091 *
6092 * Requests to set policies with multiple alternative actions will
6093 * go through a different API.
6094 */
6095 int
6096 ipsec_set_req(cred_t *cr, conn_t *connp, ipsec_req_t *req)
6097 {
6098 uint_t ah_req = 0;
6099 uint_t esp_req = 0;
6100 uint_t se_req = 0;
6101 ipsec_act_t *actp = NULL;
6102 uint_t nact;
6103 ipsec_policy_head_t *ph;
6104 boolean_t is_pol_reset, is_pol_inserted = B_FALSE;
6105 int error = 0;
6106 netstack_t *ns = connp->conn_netstack;
6107 ip_stack_t *ipst = ns->netstack_ip;
6108 ipsec_stack_t *ipss = ns->netstack_ipsec;
6109
6110 #define REQ_MASK (IPSEC_PREF_REQUIRED|IPSEC_PREF_NEVER)
6111
6112 /*
6113 * The IP_SEC_OPT option does not allow variable length parameters,
6114 * hence a request cannot be NULL.
6115 */
6116 if (req == NULL)
6117 return (EINVAL);
6118
6119 ah_req = req->ipsr_ah_req;
6120 esp_req = req->ipsr_esp_req;
6121 se_req = req->ipsr_self_encap_req;
6122
6123 /* Don't allow setting self-encap without one or more of AH/ESP. */
6124 if (se_req != 0 && esp_req == 0 && ah_req == 0)
6125 return (EINVAL);
6126
6127 /*
6128 * Are we dealing with a request to reset the policy (i.e.
6129 * zero requests).
6130 */
6131 is_pol_reset = ((ah_req & REQ_MASK) == 0 &&
6132 (esp_req & REQ_MASK) == 0 &&
6133 (se_req & REQ_MASK) == 0);
6134
6135 if (!is_pol_reset) {
6136 /*
6137 * If we couldn't load IPsec, fail with "protocol
6138 * not supported".
6139 * IPsec may not have been loaded for a request with zero
6140 * policies, so we don't fail in this case.
6141 */
6142 mutex_enter(&ipss->ipsec_loader_lock);
6143 if (ipss->ipsec_loader_state != IPSEC_LOADER_SUCCEEDED) {
6144 mutex_exit(&ipss->ipsec_loader_lock);
6145 return (EPROTONOSUPPORT);
6146 }
6147 mutex_exit(&ipss->ipsec_loader_lock);
6148
6149 /*
6150 * Test for valid requests. Invalid algorithms
6151 * need to be tested by IPsec code because new
6152 * algorithms can be added dynamically.
6153 */
6154 if ((ah_req & ~(REQ_MASK|IPSEC_PREF_UNIQUE)) != 0 ||
6155 (esp_req & ~(REQ_MASK|IPSEC_PREF_UNIQUE)) != 0 ||
6156 (se_req & ~(REQ_MASK|IPSEC_PREF_UNIQUE)) != 0) {
6157 return (EINVAL);
6158 }
6159
6160 /*
6161 * Only privileged users can issue these
6162 * requests.
6163 */
6164 if (((ah_req & IPSEC_PREF_NEVER) ||
6165 (esp_req & IPSEC_PREF_NEVER) ||
6166 (se_req & IPSEC_PREF_NEVER)) &&
6167 secpolicy_ip_config(cr, B_FALSE) != 0) {
6168 return (EPERM);
6169 }
6170
6171 /*
6172 * The IPSEC_PREF_REQUIRED and IPSEC_PREF_NEVER
6173 * are mutually exclusive.
6174 */
6175 if (((ah_req & REQ_MASK) == REQ_MASK) ||
6176 ((esp_req & REQ_MASK) == REQ_MASK) ||
6177 ((se_req & REQ_MASK) == REQ_MASK)) {
6178 /* Both of them are set */
6179 return (EINVAL);
6180 }
6181 }
6182
6183 ASSERT(MUTEX_HELD(&connp->conn_lock));
6184
6185 /*
6186 * If we have already cached policies in conn_connect(), don't
6187 * let them change now. We cache policies for connections
6188 * whose src,dst [addr, port] is known.
6189 */
6190 if (connp->conn_policy_cached) {
6191 return (EINVAL);
6192 }
6193
6194 /*
6195 * We have a zero policies, reset the connection policy if already
6196 * set. This will cause the connection to inherit the
6197 * global policy, if any.
6198 */
6199 if (is_pol_reset) {
6200 if (connp->conn_policy != NULL) {
6201 IPPH_REFRELE(connp->conn_policy, ipst->ips_netstack);
6202 connp->conn_policy = NULL;
6203 }
6204 connp->conn_in_enforce_policy = B_FALSE;
6205 connp->conn_out_enforce_policy = B_FALSE;
6206 return (0);
6207 }
6208
6209 ph = connp->conn_policy = ipsec_polhead_split(connp->conn_policy,
6210 ipst->ips_netstack);
6211 if (ph == NULL)
6212 goto enomem;
6213
6214 ipsec_actvec_from_req(req, &actp, &nact, ipst->ips_netstack);
6215 if (actp == NULL)
6216 goto enomem;
6217
6218 /*
6219 * Always insert IPv4 policy entries, since they can also apply to
6220 * ipv6 sockets being used in ipv4-compat mode.
6221 */
6222 if (!ipsec_polhead_insert(ph, actp, nact, IPSEC_AF_V4,
6223 IPSEC_TYPE_INBOUND, ns))
6224 goto enomem;
6225 is_pol_inserted = B_TRUE;
6226 if (!ipsec_polhead_insert(ph, actp, nact, IPSEC_AF_V4,
6227 IPSEC_TYPE_OUTBOUND, ns))
6228 goto enomem;
6229
6230 /*
6231 * We're looking at a v6 socket, also insert the v6-specific
6232 * entries.
6233 */
6234 if (connp->conn_family == AF_INET6) {
6235 if (!ipsec_polhead_insert(ph, actp, nact, IPSEC_AF_V6,
6236 IPSEC_TYPE_INBOUND, ns))
6237 goto enomem;
6238 if (!ipsec_polhead_insert(ph, actp, nact, IPSEC_AF_V6,
6239 IPSEC_TYPE_OUTBOUND, ns))
6240 goto enomem;
6241 }
6242
6243 ipsec_actvec_free(actp, nact);
6244
6245 /*
6246 * If the requests need security, set enforce_policy.
6247 * If the requests are IPSEC_PREF_NEVER, one should
6248 * still set conn_out_enforce_policy so that ip_set_destination
6249 * marks the ip_xmit_attr_t appropriatly. This is needed so that
6250 * for connections that we don't cache policy in at connect time,
6251 * if global policy matches in ip_output_attach_policy, we
6252 * don't wrongly inherit global policy. Similarly, we need
6253 * to set conn_in_enforce_policy also so that we don't verify
6254 * policy wrongly.
6255 */
6256 if ((ah_req & REQ_MASK) != 0 ||
6257 (esp_req & REQ_MASK) != 0 ||
6258 (se_req & REQ_MASK) != 0) {
6259 connp->conn_in_enforce_policy = B_TRUE;
6260 connp->conn_out_enforce_policy = B_TRUE;
6261 }
6262
6263 return (error);
6264 #undef REQ_MASK
6265
6266 /*
6267 * Common memory-allocation-failure exit path.
6268 */
6269 enomem:
6270 if (actp != NULL)
6271 ipsec_actvec_free(actp, nact);
6272 if (is_pol_inserted)
6273 ipsec_polhead_flush(ph, ns);
6274 return (ENOMEM);
6275 }
6276
6277 /*
6278 * Set socket options for joining and leaving multicast groups.
6279 * Common to IPv4 and IPv6; inet6 indicates the type of socket.
6280 * The caller has already check that the option name is consistent with
6281 * the address family of the socket.
6282 */
6283 int
6284 ip_opt_set_multicast_group(conn_t *connp, t_scalar_t name,
6285 uchar_t *invalp, boolean_t inet6, boolean_t checkonly)
6286 {
6287 int *i1 = (int *)invalp;
6288 int error = 0;
6289 ip_stack_t *ipst = connp->conn_netstack->netstack_ip;
6290 struct ip_mreq *v4_mreqp;
6291 struct ipv6_mreq *v6_mreqp;
6292 struct group_req *greqp;
6293 ire_t *ire;
6294 boolean_t done = B_FALSE;
6295 ipaddr_t ifaddr;
6296 in6_addr_t v6group;
6297 uint_t ifindex;
6298 boolean_t mcast_opt = B_TRUE;
6299 mcast_record_t fmode;
6300 int (*optfn)(conn_t *, boolean_t, const in6_addr_t *,
6301 ipaddr_t, uint_t, mcast_record_t, const in6_addr_t *);
6302
6303 switch (name) {
6304 case IP_ADD_MEMBERSHIP:
6305 case IPV6_JOIN_GROUP:
6306 mcast_opt = B_FALSE;
6307 /* FALLTHRU */
6308 case MCAST_JOIN_GROUP:
6309 fmode = MODE_IS_EXCLUDE;
6310 optfn = ip_opt_add_group;
6311 break;
6312
6313 case IP_DROP_MEMBERSHIP:
6314 case IPV6_LEAVE_GROUP:
6315 mcast_opt = B_FALSE;
6316 /* FALLTHRU */
6317 case MCAST_LEAVE_GROUP:
6318 fmode = MODE_IS_INCLUDE;
6319 optfn = ip_opt_delete_group;
6320 break;
6321 default:
6322 ASSERT(0);
6323 }
6324
6325 if (mcast_opt) {
6326 struct sockaddr_in *sin;
6327 struct sockaddr_in6 *sin6;
6328
6329 greqp = (struct group_req *)i1;
6330 if (greqp->gr_group.ss_family == AF_INET) {
6331 sin = (struct sockaddr_in *)&(greqp->gr_group);
6332 IN6_INADDR_TO_V4MAPPED(&sin->sin_addr, &v6group);
6333 } else {
6334 if (!inet6)
6335 return (EINVAL); /* Not on INET socket */
6336
6337 sin6 = (struct sockaddr_in6 *)&(greqp->gr_group);
6338 v6group = sin6->sin6_addr;
6339 }
6340 ifaddr = INADDR_ANY;
6341 ifindex = greqp->gr_interface;
6342 } else if (inet6) {
6343 v6_mreqp = (struct ipv6_mreq *)i1;
6344 v6group = v6_mreqp->ipv6mr_multiaddr;
6345 ifaddr = INADDR_ANY;
6346 ifindex = v6_mreqp->ipv6mr_interface;
6347 } else {
6348 v4_mreqp = (struct ip_mreq *)i1;
6349 IN6_INADDR_TO_V4MAPPED(&v4_mreqp->imr_multiaddr, &v6group);
6350 ifaddr = (ipaddr_t)v4_mreqp->imr_interface.s_addr;
6351 ifindex = 0;
6352 }
6353
6354 /*
6355 * In the multirouting case, we need to replicate
6356 * the request on all interfaces that will take part
6357 * in replication. We do so because multirouting is
6358 * reflective, thus we will probably receive multi-
6359 * casts on those interfaces.
6360 * The ip_multirt_apply_membership() succeeds if
6361 * the operation succeeds on at least one interface.
6362 */
6363 if (IN6_IS_ADDR_V4MAPPED(&v6group)) {
6364 ipaddr_t group;
6365
6366 IN6_V4MAPPED_TO_IPADDR(&v6group, group);
6367
6368 ire = ire_ftable_lookup_v4(group, IP_HOST_MASK, 0,
6369 IRE_HOST | IRE_INTERFACE, NULL, ALL_ZONES, NULL,
6370 MATCH_IRE_MASK | MATCH_IRE_TYPE, 0, ipst, NULL);
6371 } else {
6372 ire = ire_ftable_lookup_v6(&v6group, &ipv6_all_ones, 0,
6373 IRE_HOST | IRE_INTERFACE, NULL, ALL_ZONES, NULL,
6374 MATCH_IRE_MASK | MATCH_IRE_TYPE, 0, ipst, NULL);
6375 }
6376 if (ire != NULL) {
6377 if (ire->ire_flags & RTF_MULTIRT) {
6378 error = ip_multirt_apply_membership(optfn, ire, connp,
6379 checkonly, &v6group, fmode, &ipv6_all_zeros);
6380 done = B_TRUE;
6381 }
6382 ire_refrele(ire);
6383 }
6384
6385 if (!done) {
6386 error = optfn(connp, checkonly, &v6group, ifaddr, ifindex,
6387 fmode, &ipv6_all_zeros);
6388 }
6389 return (error);
6390 }
6391
6392 /*
6393 * Set socket options for joining and leaving multicast groups
6394 * for specific sources.
6395 * Common to IPv4 and IPv6; inet6 indicates the type of socket.
6396 * The caller has already check that the option name is consistent with
6397 * the address family of the socket.
6398 */
6399 int
6400 ip_opt_set_multicast_sources(conn_t *connp, t_scalar_t name,
6401 uchar_t *invalp, boolean_t inet6, boolean_t checkonly)
6402 {
6403 int *i1 = (int *)invalp;
6404 int error = 0;
6405 ip_stack_t *ipst = connp->conn_netstack->netstack_ip;
6406 struct ip_mreq_source *imreqp;
6407 struct group_source_req *gsreqp;
6408 in6_addr_t v6group, v6src;
6409 uint32_t ifindex;
6410 ipaddr_t ifaddr;
6411 boolean_t mcast_opt = B_TRUE;
6412 mcast_record_t fmode;
6413 ire_t *ire;
6414 boolean_t done = B_FALSE;
6415 int (*optfn)(conn_t *, boolean_t, const in6_addr_t *,
6416 ipaddr_t, uint_t, mcast_record_t, const in6_addr_t *);
6417
6418 switch (name) {
6419 case IP_BLOCK_SOURCE:
6420 mcast_opt = B_FALSE;
6421 /* FALLTHRU */
6422 case MCAST_BLOCK_SOURCE:
6423 fmode = MODE_IS_EXCLUDE;
6424 optfn = ip_opt_add_group;
6425 break;
6426
6427 case IP_UNBLOCK_SOURCE:
6428 mcast_opt = B_FALSE;
6429 /* FALLTHRU */
6430 case MCAST_UNBLOCK_SOURCE:
6431 fmode = MODE_IS_EXCLUDE;
6432 optfn = ip_opt_delete_group;
6433 break;
6434
6435 case IP_ADD_SOURCE_MEMBERSHIP:
6436 mcast_opt = B_FALSE;
6437 /* FALLTHRU */
6438 case MCAST_JOIN_SOURCE_GROUP:
6439 fmode = MODE_IS_INCLUDE;
6440 optfn = ip_opt_add_group;
6441 break;
6442
6443 case IP_DROP_SOURCE_MEMBERSHIP:
6444 mcast_opt = B_FALSE;
6445 /* FALLTHRU */
6446 case MCAST_LEAVE_SOURCE_GROUP:
6447 fmode = MODE_IS_INCLUDE;
6448 optfn = ip_opt_delete_group;
6449 break;
6450 default:
6451 ASSERT(0);
6452 }
6453
6454 if (mcast_opt) {
6455 gsreqp = (struct group_source_req *)i1;
6456 ifindex = gsreqp->gsr_interface;
6457 if (gsreqp->gsr_group.ss_family == AF_INET) {
6458 struct sockaddr_in *s;
6459 s = (struct sockaddr_in *)&gsreqp->gsr_group;
6460 IN6_INADDR_TO_V4MAPPED(&s->sin_addr, &v6group);
6461 s = (struct sockaddr_in *)&gsreqp->gsr_source;
6462 IN6_INADDR_TO_V4MAPPED(&s->sin_addr, &v6src);
6463 } else {
6464 struct sockaddr_in6 *s6;
6465
6466 if (!inet6)
6467 return (EINVAL); /* Not on INET socket */
6468
6469 s6 = (struct sockaddr_in6 *)&gsreqp->gsr_group;
6470 v6group = s6->sin6_addr;
6471 s6 = (struct sockaddr_in6 *)&gsreqp->gsr_source;
6472 v6src = s6->sin6_addr;
6473 }
6474 ifaddr = INADDR_ANY;
6475 } else {
6476 imreqp = (struct ip_mreq_source *)i1;
6477 IN6_INADDR_TO_V4MAPPED(&imreqp->imr_multiaddr, &v6group);
6478 IN6_INADDR_TO_V4MAPPED(&imreqp->imr_sourceaddr, &v6src);
6479 ifaddr = (ipaddr_t)imreqp->imr_interface.s_addr;
6480 ifindex = 0;
6481 }
6482
6483 /*
6484 * Handle src being mapped INADDR_ANY by changing it to unspecified.
6485 */
6486 if (IN6_IS_ADDR_V4MAPPED_ANY(&v6src))
6487 v6src = ipv6_all_zeros;
6488
6489 /*
6490 * In the multirouting case, we need to replicate
6491 * the request as noted in the mcast cases above.
6492 */
6493 if (IN6_IS_ADDR_V4MAPPED(&v6group)) {
6494 ipaddr_t group;
6495
6496 IN6_V4MAPPED_TO_IPADDR(&v6group, group);
6497
6498 ire = ire_ftable_lookup_v4(group, IP_HOST_MASK, 0,
6499 IRE_HOST | IRE_INTERFACE, NULL, ALL_ZONES, NULL,
6500 MATCH_IRE_MASK | MATCH_IRE_TYPE, 0, ipst, NULL);
6501 } else {
6502 ire = ire_ftable_lookup_v6(&v6group, &ipv6_all_ones, 0,
6503 IRE_HOST | IRE_INTERFACE, NULL, ALL_ZONES, NULL,
6504 MATCH_IRE_MASK | MATCH_IRE_TYPE, 0, ipst, NULL);
6505 }
6506 if (ire != NULL) {
6507 if (ire->ire_flags & RTF_MULTIRT) {
6508 error = ip_multirt_apply_membership(optfn, ire, connp,
6509 checkonly, &v6group, fmode, &v6src);
6510 done = B_TRUE;
6511 }
6512 ire_refrele(ire);
6513 }
6514 if (!done) {
6515 error = optfn(connp, checkonly, &v6group, ifaddr, ifindex,
6516 fmode, &v6src);
6517 }
6518 return (error);
6519 }
6520
6521 /*
6522 * Given a destination address and a pointer to where to put the information
6523 * this routine fills in the mtuinfo.
6524 * The socket must be connected.
6525 * For sctp conn_faddr is the primary address.
6526 */
6527 int
6528 ip_fill_mtuinfo(conn_t *connp, ip_xmit_attr_t *ixa, struct ip6_mtuinfo *mtuinfo)
6529 {
6530 uint32_t pmtu = IP_MAXPACKET;
6531 uint_t scopeid;
6532
6533 if (IN6_IS_ADDR_UNSPECIFIED(&connp->conn_faddr_v6))
6534 return (-1);
6535
6536 /* In case we never sent or called ip_set_destination_v4/v6 */
6537 if (ixa->ixa_ire != NULL)
6538 pmtu = ip_get_pmtu(ixa);
6539
6540 if (ixa->ixa_flags & IXAF_SCOPEID_SET)
6541 scopeid = ixa->ixa_scopeid;
6542 else
6543 scopeid = 0;
6544
6545 bzero(mtuinfo, sizeof (*mtuinfo));
6546 mtuinfo->ip6m_addr.sin6_family = AF_INET6;
6547 mtuinfo->ip6m_addr.sin6_port = connp->conn_fport;
6548 mtuinfo->ip6m_addr.sin6_addr = connp->conn_faddr_v6;
6549 mtuinfo->ip6m_addr.sin6_scope_id = scopeid;
6550 mtuinfo->ip6m_mtu = pmtu;
6551
6552 return (sizeof (struct ip6_mtuinfo));
6553 }
6554
6555 /*
6556 * When the src multihoming is changed from weak to [strong, preferred]
6557 * ip_ire_rebind_walker is called to walk the list of all ire_t entries
6558 * and identify routes that were created by user-applications in the
6559 * unbound state (i.e., without RTA_IFP), and for which an ire_ill is not
6560 * currently defined. These routes are then 'rebound', i.e., their ire_ill
6561 * is selected by finding an interface route for the gateway.
6562 */
6563 /* ARGSUSED */
6564 void
6565 ip_ire_rebind_walker(ire_t *ire, void *notused)
6566 {
6567 if (!ire->ire_unbound || ire->ire_ill != NULL)
6568 return;
6569 ire_rebind(ire);
6570 ire_delete(ire);
6571 }
6572
6573 /*
6574 * When the src multihoming is changed from [strong, preferred] to weak,
6575 * ip_ire_unbind_walker is called to walk the list of all ire_t entries, and
6576 * set any entries that were created by user-applications in the unbound state
6577 * (i.e., without RTA_IFP) back to having a NULL ire_ill.
6578 */
6579 /* ARGSUSED */
6580 void
6581 ip_ire_unbind_walker(ire_t *ire, void *notused)
6582 {
6583 ire_t *new_ire;
6584
6585 if (!ire->ire_unbound || ire->ire_ill == NULL)
6586 return;
6587 if (ire->ire_ipversion == IPV6_VERSION) {
6588 new_ire = ire_create_v6(&ire->ire_addr_v6, &ire->ire_mask_v6,
6589 &ire->ire_gateway_addr_v6, ire->ire_type, NULL,
6590 ire->ire_zoneid, ire->ire_flags, NULL, ire->ire_ipst);
6591 } else {
6592 new_ire = ire_create((uchar_t *)&ire->ire_addr,
6593 (uchar_t *)&ire->ire_mask,
6594 (uchar_t *)&ire->ire_gateway_addr, ire->ire_type, NULL,
6595 ire->ire_zoneid, ire->ire_flags, NULL, ire->ire_ipst);
6596 }
6597 if (new_ire == NULL)
6598 return;
6599 new_ire->ire_unbound = B_TRUE;
6600 /*
6601 * The bound ire must first be deleted so that we don't return
6602 * the existing one on the attempt to add the unbound new_ire.
6603 */
6604 ire_delete(ire);
6605 new_ire = ire_add(new_ire);
6606 if (new_ire != NULL)
6607 ire_refrele(new_ire);
6608 }
6609
6610 /*
6611 * When the settings of ip*_strict_src_multihoming tunables are changed,
6612 * all cached routes need to be recomputed. This recomputation needs to be
6613 * done when going from weaker to stronger modes so that the cached ire
6614 * for the connection does not violate the current ip*_strict_src_multihoming
6615 * setting. It also needs to be done when going from stronger to weaker modes,
6616 * so that we fall back to matching on the longest-matching-route (as opposed
6617 * to a shorter match that may have been selected in the strong mode
6618 * to satisfy src_multihoming settings).
6619 *
6620 * The cached ixa_ire entires for all conn_t entries are marked as
6621 * "verify" so that they will be recomputed for the next packet.
6622 */
6623 void
6624 conn_ire_revalidate(conn_t *connp, void *arg)
6625 {
6626 boolean_t isv6 = (boolean_t)arg;
6627
6628 if ((isv6 && connp->conn_ipversion != IPV6_VERSION) ||
6629 (!isv6 && connp->conn_ipversion != IPV4_VERSION))
6630 return;
6631 connp->conn_ixa->ixa_ire_generation = IRE_GENERATION_VERIFY;
6632 }
6633
6634 /*
6635 * Handles both IPv4 and IPv6 reassembly - doing the out-of-order cases,
6636 * When an ipf is passed here for the first time, if
6637 * we already have in-order fragments on the queue, we convert from the fast-
6638 * path reassembly scheme to the hard-case scheme. From then on, additional
6639 * fragments are reassembled here. We keep track of the start and end offsets
6640 * of each piece, and the number of holes in the chain. When the hole count
6641 * goes to zero, we are done!
6642 *
6643 * The ipf_count will be updated to account for any mblk(s) added (pointed to
6644 * by mp) or subtracted (freeb()ed dups), upon return the caller must update
6645 * ipfb_count and ill_frag_count by the difference of ipf_count before and
6646 * after the call to ip_reassemble().
6647 */
6648 int
6649 ip_reassemble(mblk_t *mp, ipf_t *ipf, uint_t start, boolean_t more, ill_t *ill,
6650 size_t msg_len)
6651 {
6652 uint_t end;
6653 mblk_t *next_mp;
6654 mblk_t *mp1;
6655 uint_t offset;
6656 boolean_t incr_dups = B_TRUE;
6657 boolean_t offset_zero_seen = B_FALSE;
6658 boolean_t pkt_boundary_checked = B_FALSE;
6659
6660 /* If start == 0 then ipf_nf_hdr_len has to be set. */
6661 ASSERT(start != 0 || ipf->ipf_nf_hdr_len != 0);
6662
6663 /* Add in byte count */
6664 ipf->ipf_count += msg_len;
6665 if (ipf->ipf_end) {
6666 /*
6667 * We were part way through in-order reassembly, but now there
6668 * is a hole. We walk through messages already queued, and
6669 * mark them for hard case reassembly. We know that up till
6670 * now they were in order starting from offset zero.
6671 */
6672 offset = 0;
6673 for (mp1 = ipf->ipf_mp->b_cont; mp1; mp1 = mp1->b_cont) {
6674 IP_REASS_SET_START(mp1, offset);
6675 if (offset == 0) {
6676 ASSERT(ipf->ipf_nf_hdr_len != 0);
6677 offset = -ipf->ipf_nf_hdr_len;
6678 }
6679 offset += mp1->b_wptr - mp1->b_rptr;
6680 IP_REASS_SET_END(mp1, offset);
6681 }
6682 /* One hole at the end. */
6683 ipf->ipf_hole_cnt = 1;
6684 /* Brand it as a hard case, forever. */
6685 ipf->ipf_end = 0;
6686 }
6687 /* Walk through all the new pieces. */
6688 do {
6689 end = start + (mp->b_wptr - mp->b_rptr);
6690 /*
6691 * If start is 0, decrease 'end' only for the first mblk of
6692 * the fragment. Otherwise 'end' can get wrong value in the
6693 * second pass of the loop if first mblk is exactly the
6694 * size of ipf_nf_hdr_len.
6695 */
6696 if (start == 0 && !offset_zero_seen) {
6697 /* First segment */
6698 ASSERT(ipf->ipf_nf_hdr_len != 0);
6699 end -= ipf->ipf_nf_hdr_len;
6700 offset_zero_seen = B_TRUE;
6701 }
6702 next_mp = mp->b_cont;
6703 /*
6704 * We are checking to see if there is any interesing data
6705 * to process. If there isn't and the mblk isn't the
6706 * one which carries the unfragmentable header then we
6707 * drop it. It's possible to have just the unfragmentable
6708 * header come through without any data. That needs to be
6709 * saved.
6710 *
6711 * If the assert at the top of this function holds then the
6712 * term "ipf->ipf_nf_hdr_len != 0" isn't needed. This code
6713 * is infrequently traveled enough that the test is left in
6714 * to protect against future code changes which break that
6715 * invariant.
6716 */
6717 if (start == end && start != 0 && ipf->ipf_nf_hdr_len != 0) {
6718 /* Empty. Blast it. */
6719 IP_REASS_SET_START(mp, 0);
6720 IP_REASS_SET_END(mp, 0);
6721 /*
6722 * If the ipf points to the mblk we are about to free,
6723 * update ipf to point to the next mblk (or NULL
6724 * if none).
6725 */
6726 if (ipf->ipf_mp->b_cont == mp)
6727 ipf->ipf_mp->b_cont = next_mp;
6728 freeb(mp);
6729 continue;
6730 }
6731 mp->b_cont = NULL;
6732 IP_REASS_SET_START(mp, start);
6733 IP_REASS_SET_END(mp, end);
6734 if (!ipf->ipf_tail_mp) {
6735 ipf->ipf_tail_mp = mp;
6736 ipf->ipf_mp->b_cont = mp;
6737 if (start == 0 || !more) {
6738 ipf->ipf_hole_cnt = 1;
6739 /*
6740 * if the first fragment comes in more than one
6741 * mblk, this loop will be executed for each
6742 * mblk. Need to adjust hole count so exiting
6743 * this routine will leave hole count at 1.
6744 */
6745 if (next_mp)
6746 ipf->ipf_hole_cnt++;
6747 } else
6748 ipf->ipf_hole_cnt = 2;
6749 continue;
6750 } else if (ipf->ipf_last_frag_seen && !more &&
6751 !pkt_boundary_checked) {
6752 /*
6753 * We check datagram boundary only if this fragment
6754 * claims to be the last fragment and we have seen a
6755 * last fragment in the past too. We do this only
6756 * once for a given fragment.
6757 *
6758 * start cannot be 0 here as fragments with start=0
6759 * and MF=0 gets handled as a complete packet. These
6760 * fragments should not reach here.
6761 */
6762
6763 if (start + msgdsize(mp) !=
6764 IP_REASS_END(ipf->ipf_tail_mp)) {
6765 /*
6766 * We have two fragments both of which claim
6767 * to be the last fragment but gives conflicting
6768 * information about the whole datagram size.
6769 * Something fishy is going on. Drop the
6770 * fragment and free up the reassembly list.
6771 */
6772 return (IP_REASS_FAILED);
6773 }
6774
6775 /*
6776 * We shouldn't come to this code block again for this
6777 * particular fragment.
6778 */
6779 pkt_boundary_checked = B_TRUE;
6780 }
6781
6782 /* New stuff at or beyond tail? */
6783 offset = IP_REASS_END(ipf->ipf_tail_mp);
6784 if (start >= offset) {
6785 if (ipf->ipf_last_frag_seen) {
6786 /* current fragment is beyond last fragment */
6787 return (IP_REASS_FAILED);
6788 }
6789 /* Link it on end. */
6790 ipf->ipf_tail_mp->b_cont = mp;
6791 ipf->ipf_tail_mp = mp;
6792 if (more) {
6793 if (start != offset)
6794 ipf->ipf_hole_cnt++;
6795 } else if (start == offset && next_mp == NULL)
6796 ipf->ipf_hole_cnt--;
6797 continue;
6798 }
6799 mp1 = ipf->ipf_mp->b_cont;
6800 offset = IP_REASS_START(mp1);
6801 /* New stuff at the front? */
6802 if (start < offset) {
6803 if (start == 0) {
6804 if (end >= offset) {
6805 /* Nailed the hole at the begining. */
6806 ipf->ipf_hole_cnt--;
6807 }
6808 } else if (end < offset) {
6809 /*
6810 * A hole, stuff, and a hole where there used
6811 * to be just a hole.
6812 */
6813 ipf->ipf_hole_cnt++;
6814 }
6815 mp->b_cont = mp1;
6816 /* Check for overlap. */
6817 while (end > offset) {
6818 if (end < IP_REASS_END(mp1)) {
6819 mp->b_wptr -= end - offset;
6820 IP_REASS_SET_END(mp, offset);
6821 BUMP_MIB(ill->ill_ip_mib,
6822 ipIfStatsReasmPartDups);
6823 break;
6824 }
6825 /* Did we cover another hole? */
6826 if ((mp1->b_cont &&
6827 IP_REASS_END(mp1) !=
6828 IP_REASS_START(mp1->b_cont) &&
6829 end >= IP_REASS_START(mp1->b_cont)) ||
6830 (!ipf->ipf_last_frag_seen && !more)) {
6831 ipf->ipf_hole_cnt--;
6832 }
6833 /* Clip out mp1. */
6834 if ((mp->b_cont = mp1->b_cont) == NULL) {
6835 /*
6836 * After clipping out mp1, this guy
6837 * is now hanging off the end.
6838 */
6839 ipf->ipf_tail_mp = mp;
6840 }
6841 IP_REASS_SET_START(mp1, 0);
6842 IP_REASS_SET_END(mp1, 0);
6843 /* Subtract byte count */
6844 ipf->ipf_count -= mp1->b_datap->db_lim -
6845 mp1->b_datap->db_base;
6846 freeb(mp1);
6847 BUMP_MIB(ill->ill_ip_mib,
6848 ipIfStatsReasmPartDups);
6849 mp1 = mp->b_cont;
6850 if (!mp1)
6851 break;
6852 offset = IP_REASS_START(mp1);
6853 }
6854 ipf->ipf_mp->b_cont = mp;
6855 continue;
6856 }
6857 /*
6858 * The new piece starts somewhere between the start of the head
6859 * and before the end of the tail.
6860 */
6861 for (; mp1; mp1 = mp1->b_cont) {
6862 offset = IP_REASS_END(mp1);
6863 if (start < offset) {
6864 if (end <= offset) {
6865 /* Nothing new. */
6866 IP_REASS_SET_START(mp, 0);
6867 IP_REASS_SET_END(mp, 0);
6868 /* Subtract byte count */
6869 ipf->ipf_count -= mp->b_datap->db_lim -
6870 mp->b_datap->db_base;
6871 if (incr_dups) {
6872 ipf->ipf_num_dups++;
6873 incr_dups = B_FALSE;
6874 }
6875 freeb(mp);
6876 BUMP_MIB(ill->ill_ip_mib,
6877 ipIfStatsReasmDuplicates);
6878 break;
6879 }
6880 /*
6881 * Trim redundant stuff off beginning of new
6882 * piece.
6883 */
6884 IP_REASS_SET_START(mp, offset);
6885 mp->b_rptr += offset - start;
6886 BUMP_MIB(ill->ill_ip_mib,
6887 ipIfStatsReasmPartDups);
6888 start = offset;
6889 if (!mp1->b_cont) {
6890 /*
6891 * After trimming, this guy is now
6892 * hanging off the end.
6893 */
6894 mp1->b_cont = mp;
6895 ipf->ipf_tail_mp = mp;
6896 if (!more) {
6897 ipf->ipf_hole_cnt--;
6898 }
6899 break;
6900 }
6901 }
6902 if (start >= IP_REASS_START(mp1->b_cont))
6903 continue;
6904 /* Fill a hole */
6905 if (start > offset)
6906 ipf->ipf_hole_cnt++;
6907 mp->b_cont = mp1->b_cont;
6908 mp1->b_cont = mp;
6909 mp1 = mp->b_cont;
6910 offset = IP_REASS_START(mp1);
6911 if (end >= offset) {
6912 ipf->ipf_hole_cnt--;
6913 /* Check for overlap. */
6914 while (end > offset) {
6915 if (end < IP_REASS_END(mp1)) {
6916 mp->b_wptr -= end - offset;
6917 IP_REASS_SET_END(mp, offset);
6918 /*
6919 * TODO we might bump
6920 * this up twice if there is
6921 * overlap at both ends.
6922 */
6923 BUMP_MIB(ill->ill_ip_mib,
6924 ipIfStatsReasmPartDups);
6925 break;
6926 }
6927 /* Did we cover another hole? */
6928 if ((mp1->b_cont &&
6929 IP_REASS_END(mp1)
6930 != IP_REASS_START(mp1->b_cont) &&
6931 end >=
6932 IP_REASS_START(mp1->b_cont)) ||
6933 (!ipf->ipf_last_frag_seen &&
6934 !more)) {
6935 ipf->ipf_hole_cnt--;
6936 }
6937 /* Clip out mp1. */
6938 if ((mp->b_cont = mp1->b_cont) ==
6939 NULL) {
6940 /*
6941 * After clipping out mp1,
6942 * this guy is now hanging
6943 * off the end.
6944 */
6945 ipf->ipf_tail_mp = mp;
6946 }
6947 IP_REASS_SET_START(mp1, 0);
6948 IP_REASS_SET_END(mp1, 0);
6949 /* Subtract byte count */
6950 ipf->ipf_count -=
6951 mp1->b_datap->db_lim -
6952 mp1->b_datap->db_base;
6953 freeb(mp1);
6954 BUMP_MIB(ill->ill_ip_mib,
6955 ipIfStatsReasmPartDups);
6956 mp1 = mp->b_cont;
6957 if (!mp1)
6958 break;
6959 offset = IP_REASS_START(mp1);
6960 }
6961 }
6962 break;
6963 }
6964 } while (start = end, mp = next_mp);
6965
6966 /* Fragment just processed could be the last one. Remember this fact */
6967 if (!more)
6968 ipf->ipf_last_frag_seen = B_TRUE;
6969
6970 /* Still got holes? */
6971 if (ipf->ipf_hole_cnt)
6972 return (IP_REASS_PARTIAL);
6973 /* Clean up overloaded fields to avoid upstream disasters. */
6974 for (mp1 = ipf->ipf_mp->b_cont; mp1; mp1 = mp1->b_cont) {
6975 IP_REASS_SET_START(mp1, 0);
6976 IP_REASS_SET_END(mp1, 0);
6977 }
6978 return (IP_REASS_COMPLETE);
6979 }
6980
6981 /*
6982 * Fragmentation reassembly. Each ILL has a hash table for
6983 * queuing packets undergoing reassembly for all IPIFs
6984 * associated with the ILL. The hash is based on the packet
6985 * IP ident field. The ILL frag hash table was allocated
6986 * as a timer block at the time the ILL was created. Whenever
6987 * there is anything on the reassembly queue, the timer will
6988 * be running. Returns the reassembled packet if reassembly completes.
6989 */
6990 mblk_t *
6991 ip_input_fragment(mblk_t *mp, ipha_t *ipha, ip_recv_attr_t *ira)
6992 {
6993 uint32_t frag_offset_flags;
6994 mblk_t *t_mp;
6995 ipaddr_t dst;
6996 uint8_t proto = ipha->ipha_protocol;
6997 uint32_t sum_val;
6998 uint16_t sum_flags;
6999 ipf_t *ipf;
7000 ipf_t **ipfp;
7001 ipfb_t *ipfb;
7002 uint16_t ident;
7003 uint32_t offset;
7004 ipaddr_t src;
7005 uint_t hdr_length;
7006 uint32_t end;
7007 mblk_t *mp1;
7008 mblk_t *tail_mp;
7009 size_t count;
7010 size_t msg_len;
7011 uint8_t ecn_info = 0;
7012 uint32_t packet_size;
7013 boolean_t pruned = B_FALSE;
7014 ill_t *ill = ira->ira_ill;
7015 ip_stack_t *ipst = ill->ill_ipst;
7016
7017 /*
7018 * Drop the fragmented as early as possible, if
7019 * we don't have resource(s) to re-assemble.
7020 */
7021 if (ipst->ips_ip_reass_queue_bytes == 0) {
7022 freemsg(mp);
7023 return (NULL);
7024 }
7025
7026 /* Check for fragmentation offset; return if there's none */
7027 if ((frag_offset_flags = ntohs(ipha->ipha_fragment_offset_and_flags) &
7028 (IPH_MF | IPH_OFFSET)) == 0)
7029 return (mp);
7030
7031 /*
7032 * We utilize hardware computed checksum info only for UDP since
7033 * IP fragmentation is a normal occurrence for the protocol. In
7034 * addition, checksum offload support for IP fragments carrying
7035 * UDP payload is commonly implemented across network adapters.
7036 */
7037 ASSERT(ira->ira_rill != NULL);
7038 if (proto == IPPROTO_UDP && dohwcksum &&
7039 ILL_HCKSUM_CAPABLE(ira->ira_rill) &&
7040 (DB_CKSUMFLAGS(mp) & (HCK_FULLCKSUM | HCK_PARTIALCKSUM))) {
7041 mblk_t *mp1 = mp->b_cont;
7042 int32_t len;
7043
7044 /* Record checksum information from the packet */
7045 sum_val = (uint32_t)DB_CKSUM16(mp);
7046 sum_flags = DB_CKSUMFLAGS(mp);
7047
7048 /* IP payload offset from beginning of mblk */
7049 offset = ((uchar_t *)ipha + IPH_HDR_LENGTH(ipha)) - mp->b_rptr;
7050
7051 if ((sum_flags & HCK_PARTIALCKSUM) &&
7052 (mp1 == NULL || mp1->b_cont == NULL) &&
7053 offset >= DB_CKSUMSTART(mp) &&
7054 ((len = offset - DB_CKSUMSTART(mp)) & 1) == 0) {
7055 uint32_t adj;
7056 /*
7057 * Partial checksum has been calculated by hardware
7058 * and attached to the packet; in addition, any
7059 * prepended extraneous data is even byte aligned.
7060 * If any such data exists, we adjust the checksum;
7061 * this would also handle any postpended data.
7062 */
7063 IP_ADJCKSUM_PARTIAL(mp->b_rptr + DB_CKSUMSTART(mp),
7064 mp, mp1, len, adj);
7065
7066 /* One's complement subtract extraneous checksum */
7067 if (adj >= sum_val)
7068 sum_val = ~(adj - sum_val) & 0xFFFF;
7069 else
7070 sum_val -= adj;
7071 }
7072 } else {
7073 sum_val = 0;
7074 sum_flags = 0;
7075 }
7076
7077 /* Clear hardware checksumming flag */
7078 DB_CKSUMFLAGS(mp) = 0;
7079
7080 ident = ipha->ipha_ident;
7081 offset = (frag_offset_flags << 3) & 0xFFFF;
7082 src = ipha->ipha_src;
7083 dst = ipha->ipha_dst;
7084 hdr_length = IPH_HDR_LENGTH(ipha);
7085 end = ntohs(ipha->ipha_length) - hdr_length;
7086
7087 /* If end == 0 then we have a packet with no data, so just free it */
7088 if (end == 0) {
7089 freemsg(mp);
7090 return (NULL);
7091 }
7092
7093 /* Record the ECN field info. */
7094 ecn_info = (ipha->ipha_type_of_service & 0x3);
7095 if (offset != 0) {
7096 /*
7097 * If this isn't the first piece, strip the header, and
7098 * add the offset to the end value.
7099 */
7100 mp->b_rptr += hdr_length;
7101 end += offset;
7102 }
7103
7104 /* Handle vnic loopback of fragments */
7105 if (mp->b_datap->db_ref > 2)
7106 msg_len = 0;
7107 else
7108 msg_len = MBLKSIZE(mp);
7109
7110 tail_mp = mp;
7111 while (tail_mp->b_cont != NULL) {
7112 tail_mp = tail_mp->b_cont;
7113 if (tail_mp->b_datap->db_ref <= 2)
7114 msg_len += MBLKSIZE(tail_mp);
7115 }
7116
7117 /* If the reassembly list for this ILL will get too big, prune it */
7118 if ((msg_len + sizeof (*ipf) + ill->ill_frag_count) >=
7119 ipst->ips_ip_reass_queue_bytes) {
7120 DTRACE_PROBE3(ip_reass_queue_bytes, uint_t, msg_len,
7121 uint_t, ill->ill_frag_count,
7122 uint_t, ipst->ips_ip_reass_queue_bytes);
7123 ill_frag_prune(ill,
7124 (ipst->ips_ip_reass_queue_bytes < msg_len) ? 0 :
7125 (ipst->ips_ip_reass_queue_bytes - msg_len));
7126 pruned = B_TRUE;
7127 }
7128
7129 ipfb = &ill->ill_frag_hash_tbl[ILL_FRAG_HASH(src, ident)];
7130 mutex_enter(&ipfb->ipfb_lock);
7131
7132 ipfp = &ipfb->ipfb_ipf;
7133 /* Try to find an existing fragment queue for this packet. */
7134 for (;;) {
7135 ipf = ipfp[0];
7136 if (ipf != NULL) {
7137 /*
7138 * It has to match on ident and src/dst address.
7139 */
7140 if (ipf->ipf_ident == ident &&
7141 ipf->ipf_src == src &&
7142 ipf->ipf_dst == dst &&
7143 ipf->ipf_protocol == proto) {
7144 /*
7145 * If we have received too many
7146 * duplicate fragments for this packet
7147 * free it.
7148 */
7149 if (ipf->ipf_num_dups > ip_max_frag_dups) {
7150 ill_frag_free_pkts(ill, ipfb, ipf, 1);
7151 freemsg(mp);
7152 mutex_exit(&ipfb->ipfb_lock);
7153 return (NULL);
7154 }
7155 /* Found it. */
7156 break;
7157 }
7158 ipfp = &ipf->ipf_hash_next;
7159 continue;
7160 }
7161
7162 /*
7163 * If we pruned the list, do we want to store this new
7164 * fragment?. We apply an optimization here based on the
7165 * fact that most fragments will be received in order.
7166 * So if the offset of this incoming fragment is zero,
7167 * it is the first fragment of a new packet. We will
7168 * keep it. Otherwise drop the fragment, as we have
7169 * probably pruned the packet already (since the
7170 * packet cannot be found).
7171 */
7172 if (pruned && offset != 0) {
7173 mutex_exit(&ipfb->ipfb_lock);
7174 freemsg(mp);
7175 return (NULL);
7176 }
7177
7178 if (ipfb->ipfb_frag_pkts >= MAX_FRAG_PKTS(ipst)) {
7179 /*
7180 * Too many fragmented packets in this hash
7181 * bucket. Free the oldest.
7182 */
7183 ill_frag_free_pkts(ill, ipfb, ipfb->ipfb_ipf, 1);
7184 }
7185
7186 /* New guy. Allocate a frag message. */
7187 mp1 = allocb(sizeof (*ipf), BPRI_MED);
7188 if (mp1 == NULL) {
7189 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
7190 ip_drop_input("ipIfStatsInDiscards", mp, ill);
7191 freemsg(mp);
7192 reass_done:
7193 mutex_exit(&ipfb->ipfb_lock);
7194 return (NULL);
7195 }
7196
7197 BUMP_MIB(ill->ill_ip_mib, ipIfStatsReasmReqds);
7198 mp1->b_cont = mp;
7199
7200 /* Initialize the fragment header. */
7201 ipf = (ipf_t *)mp1->b_rptr;
7202 ipf->ipf_mp = mp1;
7203 ipf->ipf_ptphn = ipfp;
7204 ipfp[0] = ipf;
7205 ipf->ipf_hash_next = NULL;
7206 ipf->ipf_ident = ident;
7207 ipf->ipf_protocol = proto;
7208 ipf->ipf_src = src;
7209 ipf->ipf_dst = dst;
7210 ipf->ipf_nf_hdr_len = 0;
7211 /* Record reassembly start time. */
7212 ipf->ipf_timestamp = gethrestime_sec();
7213 /* Record ipf generation and account for frag header */
7214 ipf->ipf_gen = ill->ill_ipf_gen++;
7215 ipf->ipf_count = MBLKSIZE(mp1);
7216 ipf->ipf_last_frag_seen = B_FALSE;
7217 ipf->ipf_ecn = ecn_info;
7218 ipf->ipf_num_dups = 0;
7219 ipfb->ipfb_frag_pkts++;
7220 ipf->ipf_checksum = 0;
7221 ipf->ipf_checksum_flags = 0;
7222
7223 /* Store checksum value in fragment header */
7224 if (sum_flags != 0) {
7225 sum_val = (sum_val & 0xFFFF) + (sum_val >> 16);
7226 sum_val = (sum_val & 0xFFFF) + (sum_val >> 16);
7227 ipf->ipf_checksum = sum_val;
7228 ipf->ipf_checksum_flags = sum_flags;
7229 }
7230
7231 /*
7232 * We handle reassembly two ways. In the easy case,
7233 * where all the fragments show up in order, we do
7234 * minimal bookkeeping, and just clip new pieces on
7235 * the end. If we ever see a hole, then we go off
7236 * to ip_reassemble which has to mark the pieces and
7237 * keep track of the number of holes, etc. Obviously,
7238 * the point of having both mechanisms is so we can
7239 * handle the easy case as efficiently as possible.
7240 */
7241 if (offset == 0) {
7242 /* Easy case, in-order reassembly so far. */
7243 ipf->ipf_count += msg_len;
7244 ipf->ipf_tail_mp = tail_mp;
7245 /*
7246 * Keep track of next expected offset in
7247 * ipf_end.
7248 */
7249 ipf->ipf_end = end;
7250 ipf->ipf_nf_hdr_len = hdr_length;
7251 } else {
7252 /* Hard case, hole at the beginning. */
7253 ipf->ipf_tail_mp = NULL;
7254 /*
7255 * ipf_end == 0 means that we have given up
7256 * on easy reassembly.
7257 */
7258 ipf->ipf_end = 0;
7259
7260 /* Forget checksum offload from now on */
7261 ipf->ipf_checksum_flags = 0;
7262
7263 /*
7264 * ipf_hole_cnt is set by ip_reassemble.
7265 * ipf_count is updated by ip_reassemble.
7266 * No need to check for return value here
7267 * as we don't expect reassembly to complete
7268 * or fail for the first fragment itself.
7269 */
7270 (void) ip_reassemble(mp, ipf,
7271 (frag_offset_flags & IPH_OFFSET) << 3,
7272 (frag_offset_flags & IPH_MF), ill, msg_len);
7273 }
7274 /* Update per ipfb and ill byte counts */
7275 ipfb->ipfb_count += ipf->ipf_count;
7276 ASSERT(ipfb->ipfb_count > 0); /* Wraparound */
7277 atomic_add_32(&ill->ill_frag_count, ipf->ipf_count);
7278 /* If the frag timer wasn't already going, start it. */
7279 mutex_enter(&ill->ill_lock);
7280 ill_frag_timer_start(ill);
7281 mutex_exit(&ill->ill_lock);
7282 goto reass_done;
7283 }
7284
7285 /*
7286 * If the packet's flag has changed (it could be coming up
7287 * from an interface different than the previous, therefore
7288 * possibly different checksum capability), then forget about
7289 * any stored checksum states. Otherwise add the value to
7290 * the existing one stored in the fragment header.
7291 */
7292 if (sum_flags != 0 && sum_flags == ipf->ipf_checksum_flags) {
7293 sum_val += ipf->ipf_checksum;
7294 sum_val = (sum_val & 0xFFFF) + (sum_val >> 16);
7295 sum_val = (sum_val & 0xFFFF) + (sum_val >> 16);
7296 ipf->ipf_checksum = sum_val;
7297 } else if (ipf->ipf_checksum_flags != 0) {
7298 /* Forget checksum offload from now on */
7299 ipf->ipf_checksum_flags = 0;
7300 }
7301
7302 /*
7303 * We have a new piece of a datagram which is already being
7304 * reassembled. Update the ECN info if all IP fragments
7305 * are ECN capable. If there is one which is not, clear
7306 * all the info. If there is at least one which has CE
7307 * code point, IP needs to report that up to transport.
7308 */
7309 if (ecn_info != IPH_ECN_NECT && ipf->ipf_ecn != IPH_ECN_NECT) {
7310 if (ecn_info == IPH_ECN_CE)
7311 ipf->ipf_ecn = IPH_ECN_CE;
7312 } else {
7313 ipf->ipf_ecn = IPH_ECN_NECT;
7314 }
7315 if (offset && ipf->ipf_end == offset) {
7316 /* The new fragment fits at the end */
7317 ipf->ipf_tail_mp->b_cont = mp;
7318 /* Update the byte count */
7319 ipf->ipf_count += msg_len;
7320 /* Update per ipfb and ill byte counts */
7321 ipfb->ipfb_count += msg_len;
7322 ASSERT(ipfb->ipfb_count > 0); /* Wraparound */
7323 atomic_add_32(&ill->ill_frag_count, msg_len);
7324 if (frag_offset_flags & IPH_MF) {
7325 /* More to come. */
7326 ipf->ipf_end = end;
7327 ipf->ipf_tail_mp = tail_mp;
7328 goto reass_done;
7329 }
7330 } else {
7331 /* Go do the hard cases. */
7332 int ret;
7333
7334 if (offset == 0)
7335 ipf->ipf_nf_hdr_len = hdr_length;
7336
7337 /* Save current byte count */
7338 count = ipf->ipf_count;
7339 ret = ip_reassemble(mp, ipf,
7340 (frag_offset_flags & IPH_OFFSET) << 3,
7341 (frag_offset_flags & IPH_MF), ill, msg_len);
7342 /* Count of bytes added and subtracted (freeb()ed) */
7343 count = ipf->ipf_count - count;
7344 if (count) {
7345 /* Update per ipfb and ill byte counts */
7346 ipfb->ipfb_count += count;
7347 ASSERT(ipfb->ipfb_count > 0); /* Wraparound */
7348 atomic_add_32(&ill->ill_frag_count, count);
7349 }
7350 if (ret == IP_REASS_PARTIAL) {
7351 goto reass_done;
7352 } else if (ret == IP_REASS_FAILED) {
7353 /* Reassembly failed. Free up all resources */
7354 ill_frag_free_pkts(ill, ipfb, ipf, 1);
7355 for (t_mp = mp; t_mp != NULL; t_mp = t_mp->b_cont) {
7356 IP_REASS_SET_START(t_mp, 0);
7357 IP_REASS_SET_END(t_mp, 0);
7358 }
7359 freemsg(mp);
7360 goto reass_done;
7361 }
7362 /* We will reach here iff 'ret' is IP_REASS_COMPLETE */
7363 }
7364 /*
7365 * We have completed reassembly. Unhook the frag header from
7366 * the reassembly list.
7367 *
7368 * Before we free the frag header, record the ECN info
7369 * to report back to the transport.
7370 */
7371 ecn_info = ipf->ipf_ecn;
7372 BUMP_MIB(ill->ill_ip_mib, ipIfStatsReasmOKs);
7373 ipfp = ipf->ipf_ptphn;
7374
7375 /* We need to supply these to caller */
7376 if ((sum_flags = ipf->ipf_checksum_flags) != 0)
7377 sum_val = ipf->ipf_checksum;
7378 else
7379 sum_val = 0;
7380
7381 mp1 = ipf->ipf_mp;
7382 count = ipf->ipf_count;
7383 ipf = ipf->ipf_hash_next;
7384 if (ipf != NULL)
7385 ipf->ipf_ptphn = ipfp;
7386 ipfp[0] = ipf;
7387 atomic_add_32(&ill->ill_frag_count, -count);
7388 ASSERT(ipfb->ipfb_count >= count);
7389 ipfb->ipfb_count -= count;
7390 ipfb->ipfb_frag_pkts--;
7391 mutex_exit(&ipfb->ipfb_lock);
7392 /* Ditch the frag header. */
7393 mp = mp1->b_cont;
7394
7395 freeb(mp1);
7396
7397 /* Restore original IP length in header. */
7398 packet_size = (uint32_t)msgdsize(mp);
7399 if (packet_size > IP_MAXPACKET) {
7400 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInHdrErrors);
7401 ip_drop_input("Reassembled packet too large", mp, ill);
7402 freemsg(mp);
7403 return (NULL);
7404 }
7405
7406 if (DB_REF(mp) > 1) {
7407 mblk_t *mp2 = copymsg(mp);
7408
7409 if (mp2 == NULL) {
7410 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
7411 ip_drop_input("ipIfStatsInDiscards", mp, ill);
7412 freemsg(mp);
7413 return (NULL);
7414 }
7415 freemsg(mp);
7416 mp = mp2;
7417 }
7418 ipha = (ipha_t *)mp->b_rptr;
7419
7420 ipha->ipha_length = htons((uint16_t)packet_size);
7421 /* We're now complete, zip the frag state */
7422 ipha->ipha_fragment_offset_and_flags = 0;
7423 /* Record the ECN info. */
7424 ipha->ipha_type_of_service &= 0xFC;
7425 ipha->ipha_type_of_service |= ecn_info;
7426
7427 /* Update the receive attributes */
7428 ira->ira_pktlen = packet_size;
7429 ira->ira_ip_hdr_length = IPH_HDR_LENGTH(ipha);
7430
7431 /* Reassembly is successful; set checksum information in packet */
7432 DB_CKSUM16(mp) = (uint16_t)sum_val;
7433 DB_CKSUMFLAGS(mp) = sum_flags;
7434 DB_CKSUMSTART(mp) = ira->ira_ip_hdr_length;
7435
7436 return (mp);
7437 }
7438
7439 /*
7440 * Pullup function that should be used for IP input in order to
7441 * ensure we do not loose the L2 source address; we need the l2 source
7442 * address for IP_RECVSLLA and for ndp_input.
7443 *
7444 * We return either NULL or b_rptr.
7445 */
7446 void *
7447 ip_pullup(mblk_t *mp, ssize_t len, ip_recv_attr_t *ira)
7448 {
7449 ill_t *ill = ira->ira_ill;
7450
7451 if (ip_rput_pullups++ == 0) {
7452 (void) mi_strlog(ill->ill_rq, 1, SL_ERROR|SL_TRACE,
7453 "ip_pullup: %s forced us to "
7454 " pullup pkt, hdr len %ld, hdr addr %p",
7455 ill->ill_name, len, (void *)mp->b_rptr);
7456 }
7457 if (!(ira->ira_flags & IRAF_L2SRC_SET))
7458 ip_setl2src(mp, ira, ira->ira_rill);
7459 ASSERT(ira->ira_flags & IRAF_L2SRC_SET);
7460 if (!pullupmsg(mp, len))
7461 return (NULL);
7462 else
7463 return (mp->b_rptr);
7464 }
7465
7466 /*
7467 * Make sure ira_l2src has an address. If we don't have one fill with zeros.
7468 * When called from the ULP ira_rill will be NULL hence the caller has to
7469 * pass in the ill.
7470 */
7471 /* ARGSUSED */
7472 void
7473 ip_setl2src(mblk_t *mp, ip_recv_attr_t *ira, ill_t *ill)
7474 {
7475 const uchar_t *addr;
7476 int alen;
7477
7478 if (ira->ira_flags & IRAF_L2SRC_SET)
7479 return;
7480
7481 ASSERT(ill != NULL);
7482 alen = ill->ill_phys_addr_length;
7483 ASSERT(alen <= sizeof (ira->ira_l2src));
7484 if (ira->ira_mhip != NULL &&
7485 (addr = ira->ira_mhip->mhi_saddr) != NULL) {
7486 bcopy(addr, ira->ira_l2src, alen);
7487 } else if ((ira->ira_flags & IRAF_L2SRC_LOOPBACK) &&
7488 (addr = ill->ill_phys_addr) != NULL) {
7489 bcopy(addr, ira->ira_l2src, alen);
7490 } else {
7491 bzero(ira->ira_l2src, alen);
7492 }
7493 ira->ira_flags |= IRAF_L2SRC_SET;
7494 }
7495
7496 /*
7497 * check ip header length and align it.
7498 */
7499 mblk_t *
7500 ip_check_and_align_header(mblk_t *mp, uint_t min_size, ip_recv_attr_t *ira)
7501 {
7502 ill_t *ill = ira->ira_ill;
7503 ssize_t len;
7504
7505 len = MBLKL(mp);
7506
7507 if (!OK_32PTR(mp->b_rptr))
7508 IP_STAT(ill->ill_ipst, ip_notaligned);
7509 else
7510 IP_STAT(ill->ill_ipst, ip_recv_pullup);
7511
7512 /* Guard against bogus device drivers */
7513 if (len < 0) {
7514 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInHdrErrors);
7515 ip_drop_input("ipIfStatsInHdrErrors", mp, ill);
7516 freemsg(mp);
7517 return (NULL);
7518 }
7519
7520 if (len == 0) {
7521 /* GLD sometimes sends up mblk with b_rptr == b_wptr! */
7522 mblk_t *mp1 = mp->b_cont;
7523
7524 if (!(ira->ira_flags & IRAF_L2SRC_SET))
7525 ip_setl2src(mp, ira, ira->ira_rill);
7526 ASSERT(ira->ira_flags & IRAF_L2SRC_SET);
7527
7528 freeb(mp);
7529 mp = mp1;
7530 if (mp == NULL)
7531 return (NULL);
7532
7533 if (OK_32PTR(mp->b_rptr) && MBLKL(mp) >= min_size)
7534 return (mp);
7535 }
7536 if (ip_pullup(mp, min_size, ira) == NULL) {
7537 if (msgdsize(mp) < min_size) {
7538 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInHdrErrors);
7539 ip_drop_input("ipIfStatsInHdrErrors", mp, ill);
7540 } else {
7541 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
7542 ip_drop_input("ipIfStatsInDiscards", mp, ill);
7543 }
7544 freemsg(mp);
7545 return (NULL);
7546 }
7547 return (mp);
7548 }
7549
7550 /*
7551 * Common code for IPv4 and IPv6 to check and pullup multi-mblks
7552 */
7553 mblk_t *
7554 ip_check_length(mblk_t *mp, uchar_t *rptr, ssize_t len, uint_t pkt_len,
7555 uint_t min_size, ip_recv_attr_t *ira)
7556 {
7557 ill_t *ill = ira->ira_ill;
7558
7559 /*
7560 * Make sure we have data length consistent
7561 * with the IP header.
7562 */
7563 if (mp->b_cont == NULL) {
7564 /* pkt_len is based on ipha_len, not the mblk length */
7565 if (pkt_len < min_size) {
7566 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInHdrErrors);
7567 ip_drop_input("ipIfStatsInHdrErrors", mp, ill);
7568 freemsg(mp);
7569 return (NULL);
7570 }
7571 if (len < 0) {
7572 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInTruncatedPkts);
7573 ip_drop_input("ipIfStatsInTruncatedPkts", mp, ill);
7574 freemsg(mp);
7575 return (NULL);
7576 }
7577 /* Drop any pad */
7578 mp->b_wptr = rptr + pkt_len;
7579 } else if ((len += msgdsize(mp->b_cont)) != 0) {
7580 ASSERT(pkt_len >= min_size);
7581 if (pkt_len < min_size) {
7582 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInHdrErrors);
7583 ip_drop_input("ipIfStatsInHdrErrors", mp, ill);
7584 freemsg(mp);
7585 return (NULL);
7586 }
7587 if (len < 0) {
7588 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInTruncatedPkts);
7589 ip_drop_input("ipIfStatsInTruncatedPkts", mp, ill);
7590 freemsg(mp);
7591 return (NULL);
7592 }
7593 /* Drop any pad */
7594 (void) adjmsg(mp, -len);
7595 /*
7596 * adjmsg may have freed an mblk from the chain, hence
7597 * invalidate any hw checksum here. This will force IP to
7598 * calculate the checksum in sw, but only for this packet.
7599 */
7600 DB_CKSUMFLAGS(mp) = 0;
7601 IP_STAT(ill->ill_ipst, ip_multimblk);
7602 }
7603 return (mp);
7604 }
7605
7606 /*
7607 * Check that the IPv4 opt_len is consistent with the packet and pullup
7608 * the options.
7609 */
7610 mblk_t *
7611 ip_check_optlen(mblk_t *mp, ipha_t *ipha, uint_t opt_len, uint_t pkt_len,
7612 ip_recv_attr_t *ira)
7613 {
7614 ill_t *ill = ira->ira_ill;
7615 ssize_t len;
7616
7617 /* Assume no IPv6 packets arrive over the IPv4 queue */
7618 if (IPH_HDR_VERSION(ipha) != IPV4_VERSION) {
7619 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInHdrErrors);
7620 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInWrongIPVersion);
7621 ip_drop_input("IPvN packet on IPv4 ill", mp, ill);
7622 freemsg(mp);
7623 return (NULL);
7624 }
7625
7626 if (opt_len > (15 - IP_SIMPLE_HDR_LENGTH_IN_WORDS)) {
7627 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInHdrErrors);
7628 ip_drop_input("ipIfStatsInHdrErrors", mp, ill);
7629 freemsg(mp);
7630 return (NULL);
7631 }
7632 /*
7633 * Recompute complete header length and make sure we
7634 * have access to all of it.
7635 */
7636 len = ((size_t)opt_len + IP_SIMPLE_HDR_LENGTH_IN_WORDS) << 2;
7637 if (len > (mp->b_wptr - mp->b_rptr)) {
7638 if (len > pkt_len) {
7639 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInHdrErrors);
7640 ip_drop_input("ipIfStatsInHdrErrors", mp, ill);
7641 freemsg(mp);
7642 return (NULL);
7643 }
7644 if (ip_pullup(mp, len, ira) == NULL) {
7645 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
7646 ip_drop_input("ipIfStatsInDiscards", mp, ill);
7647 freemsg(mp);
7648 return (NULL);
7649 }
7650 }
7651 return (mp);
7652 }
7653
7654 /*
7655 * Returns a new ire, or the same ire, or NULL.
7656 * If a different IRE is returned, then it is held; the caller
7657 * needs to release it.
7658 * In no case is there any hold/release on the ire argument.
7659 */
7660 ire_t *
7661 ip_check_multihome(void *addr, ire_t *ire, ill_t *ill)
7662 {
7663 ire_t *new_ire;
7664 ill_t *ire_ill;
7665 uint_t ifindex;
7666 ip_stack_t *ipst = ill->ill_ipst;
7667 boolean_t strict_check = B_FALSE;
7668
7669 /*
7670 * IPMP common case: if IRE and ILL are in the same group, there's no
7671 * issue (e.g. packet received on an underlying interface matched an
7672 * IRE_LOCAL on its associated group interface).
7673 */
7674 ASSERT(ire->ire_ill != NULL);
7675 if (IS_IN_SAME_ILLGRP(ill, ire->ire_ill))
7676 return (ire);
7677
7678 /*
7679 * Do another ire lookup here, using the ingress ill, to see if the
7680 * interface is in a usesrc group.
7681 * As long as the ills belong to the same group, we don't consider
7682 * them to be arriving on the wrong interface. Thus, if the switch
7683 * is doing inbound load spreading, we won't drop packets when the
7684 * ip*_strict_dst_multihoming switch is on.
7685 * We also need to check for IPIF_UNNUMBERED point2point interfaces
7686 * where the local address may not be unique. In this case we were
7687 * at the mercy of the initial ire lookup and the IRE_LOCAL it
7688 * actually returned. The new lookup, which is more specific, should
7689 * only find the IRE_LOCAL associated with the ingress ill if one
7690 * exists.
7691 */
7692 if (ire->ire_ipversion == IPV4_VERSION) {
7693 if (ipst->ips_ip_strict_dst_multihoming)
7694 strict_check = B_TRUE;
7695 new_ire = ire_ftable_lookup_v4(*((ipaddr_t *)addr), 0, 0,
7696 IRE_LOCAL, ill, ALL_ZONES, NULL,
7697 (MATCH_IRE_TYPE|MATCH_IRE_ILL), 0, ipst, NULL);
7698 } else {
7699 ASSERT(!IN6_IS_ADDR_MULTICAST((in6_addr_t *)addr));
7700 if (ipst->ips_ipv6_strict_dst_multihoming)
7701 strict_check = B_TRUE;
7702 new_ire = ire_ftable_lookup_v6((in6_addr_t *)addr, NULL, NULL,
7703 IRE_LOCAL, ill, ALL_ZONES, NULL,
7704 (MATCH_IRE_TYPE|MATCH_IRE_ILL), 0, ipst, NULL);
7705 }
7706 /*
7707 * If the same ire that was returned in ip_input() is found then this
7708 * is an indication that usesrc groups are in use. The packet
7709 * arrived on a different ill in the group than the one associated with
7710 * the destination address. If a different ire was found then the same
7711 * IP address must be hosted on multiple ills. This is possible with
7712 * unnumbered point2point interfaces. We switch to use this new ire in
7713 * order to have accurate interface statistics.
7714 */
7715 if (new_ire != NULL) {
7716 /* Note: held in one case but not the other? Caller handles */
7717 if (new_ire != ire)
7718 return (new_ire);
7719 /* Unchanged */
7720 ire_refrele(new_ire);
7721 return (ire);
7722 }
7723
7724 /*
7725 * Chase pointers once and store locally.
7726 */
7727 ASSERT(ire->ire_ill != NULL);
7728 ire_ill = ire->ire_ill;
7729 ifindex = ill->ill_usesrc_ifindex;
7730
7731 /*
7732 * Check if it's a legal address on the 'usesrc' interface.
7733 * For IPMP data addresses the IRE_LOCAL is the upper, hence we
7734 * can just check phyint_ifindex.
7735 */
7736 if (ifindex != 0 && ifindex == ire_ill->ill_phyint->phyint_ifindex) {
7737 return (ire);
7738 }
7739
7740 /*
7741 * If the ip*_strict_dst_multihoming switch is on then we can
7742 * only accept this packet if the interface is marked as routing.
7743 */
7744 if (!(strict_check))
7745 return (ire);
7746
7747 if ((ill->ill_flags & ire->ire_ill->ill_flags & ILLF_ROUTER) != 0) {
7748 return (ire);
7749 }
7750 return (NULL);
7751 }
7752
7753 /*
7754 * This function is used to construct a mac_header_info_s from a
7755 * DL_UNITDATA_IND message.
7756 * The address fields in the mhi structure points into the message,
7757 * thus the caller can't use those fields after freeing the message.
7758 *
7759 * We determine whether the packet received is a non-unicast packet
7760 * and in doing so, determine whether or not it is broadcast vs multicast.
7761 * For it to be a broadcast packet, we must have the appropriate mblk_t
7762 * hanging off the ill_t. If this is either not present or doesn't match
7763 * the destination mac address in the DL_UNITDATA_IND, the packet is deemed
7764 * to be multicast. Thus NICs that have no broadcast address (or no
7765 * capability for one, such as point to point links) cannot return as
7766 * the packet being broadcast.
7767 */
7768 void
7769 ip_dlur_to_mhi(ill_t *ill, mblk_t *mb, struct mac_header_info_s *mhip)
7770 {
7771 dl_unitdata_ind_t *ind = (dl_unitdata_ind_t *)mb->b_rptr;
7772 mblk_t *bmp;
7773 uint_t extra_offset;
7774
7775 bzero(mhip, sizeof (struct mac_header_info_s));
7776
7777 mhip->mhi_dsttype = MAC_ADDRTYPE_UNICAST;
7778
7779 if (ill->ill_sap_length < 0)
7780 extra_offset = 0;
7781 else
7782 extra_offset = ill->ill_sap_length;
7783
7784 mhip->mhi_daddr = (uchar_t *)ind + ind->dl_dest_addr_offset +
7785 extra_offset;
7786 mhip->mhi_saddr = (uchar_t *)ind + ind->dl_src_addr_offset +
7787 extra_offset;
7788
7789 if (!ind->dl_group_address)
7790 return;
7791
7792 /* Multicast or broadcast */
7793 mhip->mhi_dsttype = MAC_ADDRTYPE_MULTICAST;
7794
7795 if (ind->dl_dest_addr_offset > sizeof (*ind) &&
7796 ind->dl_dest_addr_offset + ind->dl_dest_addr_length < MBLKL(mb) &&
7797 (bmp = ill->ill_bcast_mp) != NULL) {
7798 dl_unitdata_req_t *dlur;
7799 uint8_t *bphys_addr;
7800
7801 dlur = (dl_unitdata_req_t *)bmp->b_rptr;
7802 bphys_addr = (uchar_t *)dlur + dlur->dl_dest_addr_offset +
7803 extra_offset;
7804
7805 if (bcmp(mhip->mhi_daddr, bphys_addr,
7806 ind->dl_dest_addr_length) == 0)
7807 mhip->mhi_dsttype = MAC_ADDRTYPE_BROADCAST;
7808 }
7809 }
7810
7811 /*
7812 * This function is used to construct a mac_header_info_s from a
7813 * M_DATA fastpath message from a DLPI driver.
7814 * The address fields in the mhi structure points into the message,
7815 * thus the caller can't use those fields after freeing the message.
7816 *
7817 * We determine whether the packet received is a non-unicast packet
7818 * and in doing so, determine whether or not it is broadcast vs multicast.
7819 * For it to be a broadcast packet, we must have the appropriate mblk_t
7820 * hanging off the ill_t. If this is either not present or doesn't match
7821 * the destination mac address in the DL_UNITDATA_IND, the packet is deemed
7822 * to be multicast. Thus NICs that have no broadcast address (or no
7823 * capability for one, such as point to point links) cannot return as
7824 * the packet being broadcast.
7825 */
7826 void
7827 ip_mdata_to_mhi(ill_t *ill, mblk_t *mp, struct mac_header_info_s *mhip)
7828 {
7829 mblk_t *bmp;
7830 struct ether_header *pether;
7831
7832 bzero(mhip, sizeof (struct mac_header_info_s));
7833
7834 mhip->mhi_dsttype = MAC_ADDRTYPE_UNICAST;
7835
7836 pether = (struct ether_header *)((char *)mp->b_rptr
7837 - sizeof (struct ether_header));
7838
7839 /*
7840 * Make sure the interface is an ethernet type, since we don't
7841 * know the header format for anything but Ethernet. Also make
7842 * sure we are pointing correctly above db_base.
7843 */
7844 if (ill->ill_type != IFT_ETHER)
7845 return;
7846
7847 retry:
7848 if ((uchar_t *)pether < mp->b_datap->db_base)
7849 return;
7850
7851 /* Is there a VLAN tag? */
7852 if (ill->ill_isv6) {
7853 if (pether->ether_type != htons(ETHERTYPE_IPV6)) {
7854 pether = (struct ether_header *)((char *)pether - 4);
7855 goto retry;
7856 }
7857 } else {
7858 if (pether->ether_type != htons(ETHERTYPE_IP)) {
7859 pether = (struct ether_header *)((char *)pether - 4);
7860 goto retry;
7861 }
7862 }
7863 mhip->mhi_daddr = (uchar_t *)&pether->ether_dhost;
7864 mhip->mhi_saddr = (uchar_t *)&pether->ether_shost;
7865
7866 if (!(mhip->mhi_daddr[0] & 0x01))
7867 return;
7868
7869 /* Multicast or broadcast */
7870 mhip->mhi_dsttype = MAC_ADDRTYPE_MULTICAST;
7871
7872 if ((bmp = ill->ill_bcast_mp) != NULL) {
7873 dl_unitdata_req_t *dlur;
7874 uint8_t *bphys_addr;
7875 uint_t addrlen;
7876
7877 dlur = (dl_unitdata_req_t *)bmp->b_rptr;
7878 addrlen = dlur->dl_dest_addr_length;
7879 if (ill->ill_sap_length < 0) {
7880 bphys_addr = (uchar_t *)dlur +
7881 dlur->dl_dest_addr_offset;
7882 addrlen += ill->ill_sap_length;
7883 } else {
7884 bphys_addr = (uchar_t *)dlur +
7885 dlur->dl_dest_addr_offset +
7886 ill->ill_sap_length;
7887 addrlen -= ill->ill_sap_length;
7888 }
7889 if (bcmp(mhip->mhi_daddr, bphys_addr, addrlen) == 0)
7890 mhip->mhi_dsttype = MAC_ADDRTYPE_BROADCAST;
7891 }
7892 }
7893
7894 /*
7895 * Handle anything but M_DATA messages
7896 * We see the DL_UNITDATA_IND which are part
7897 * of the data path, and also the other messages from the driver.
7898 */
7899 void
7900 ip_rput_notdata(ill_t *ill, mblk_t *mp)
7901 {
7902 mblk_t *first_mp;
7903 struct iocblk *iocp;
7904 struct mac_header_info_s mhi;
7905
7906 switch (DB_TYPE(mp)) {
7907 case M_PROTO:
7908 case M_PCPROTO: {
7909 if (((dl_unitdata_ind_t *)mp->b_rptr)->dl_primitive !=
7910 DL_UNITDATA_IND) {
7911 /* Go handle anything other than data elsewhere. */
7912 ip_rput_dlpi(ill, mp);
7913 return;
7914 }
7915
7916 first_mp = mp;
7917 mp = first_mp->b_cont;
7918 first_mp->b_cont = NULL;
7919
7920 if (mp == NULL) {
7921 freeb(first_mp);
7922 return;
7923 }
7924 ip_dlur_to_mhi(ill, first_mp, &mhi);
7925 if (ill->ill_isv6)
7926 ip_input_v6(ill, NULL, mp, &mhi);
7927 else
7928 ip_input(ill, NULL, mp, &mhi);
7929
7930 /* Ditch the DLPI header. */
7931 freeb(first_mp);
7932 return;
7933 }
7934 case M_IOCACK:
7935 iocp = (struct iocblk *)mp->b_rptr;
7936 switch (iocp->ioc_cmd) {
7937 case DL_IOC_HDR_INFO:
7938 ill_fastpath_ack(ill, mp);
7939 return;
7940 default:
7941 putnext(ill->ill_rq, mp);
7942 return;
7943 }
7944 /* FALLTHRU */
7945 case M_ERROR:
7946 case M_HANGUP:
7947 mutex_enter(&ill->ill_lock);
7948 if (ill->ill_state_flags & ILL_CONDEMNED) {
7949 mutex_exit(&ill->ill_lock);
7950 freemsg(mp);
7951 return;
7952 }
7953 ill_refhold_locked(ill);
7954 mutex_exit(&ill->ill_lock);
7955 qwriter_ip(ill, ill->ill_rq, mp, ip_rput_other, CUR_OP,
7956 B_FALSE);
7957 return;
7958 case M_CTL:
7959 putnext(ill->ill_rq, mp);
7960 return;
7961 case M_IOCNAK:
7962 ip1dbg(("got iocnak "));
7963 iocp = (struct iocblk *)mp->b_rptr;
7964 switch (iocp->ioc_cmd) {
7965 case DL_IOC_HDR_INFO:
7966 ip_rput_other(NULL, ill->ill_rq, mp, NULL);
7967 return;
7968 default:
7969 break;
7970 }
7971 /* FALLTHRU */
7972 default:
7973 putnext(ill->ill_rq, mp);
7974 return;
7975 }
7976 }
7977
7978 /* Read side put procedure. Packets coming from the wire arrive here. */
7979 void
7980 ip_rput(queue_t *q, mblk_t *mp)
7981 {
7982 ill_t *ill;
7983 union DL_primitives *dl;
7984
7985 ill = (ill_t *)q->q_ptr;
7986
7987 if (ill->ill_state_flags & (ILL_CONDEMNED | ILL_LL_SUBNET_PENDING)) {
7988 /*
7989 * If things are opening or closing, only accept high-priority
7990 * DLPI messages. (On open ill->ill_ipif has not yet been
7991 * created; on close, things hanging off the ill may have been
7992 * freed already.)
7993 */
7994 dl = (union DL_primitives *)mp->b_rptr;
7995 if (DB_TYPE(mp) != M_PCPROTO ||
7996 dl->dl_primitive == DL_UNITDATA_IND) {
7997 inet_freemsg(mp);
7998 return;
7999 }
8000 }
8001 if (DB_TYPE(mp) == M_DATA) {
8002 struct mac_header_info_s mhi;
8003
8004 ip_mdata_to_mhi(ill, mp, &mhi);
8005 ip_input(ill, NULL, mp, &mhi);
8006 } else {
8007 ip_rput_notdata(ill, mp);
8008 }
8009 }
8010
8011 /*
8012 * Move the information to a copy.
8013 */
8014 mblk_t *
8015 ip_fix_dbref(mblk_t *mp, ip_recv_attr_t *ira)
8016 {
8017 mblk_t *mp1;
8018 ill_t *ill = ira->ira_ill;
8019 ip_stack_t *ipst = ill->ill_ipst;
8020
8021 IP_STAT(ipst, ip_db_ref);
8022
8023 /* Make sure we have ira_l2src before we loose the original mblk */
8024 if (!(ira->ira_flags & IRAF_L2SRC_SET))
8025 ip_setl2src(mp, ira, ira->ira_rill);
8026
8027 mp1 = copymsg(mp);
8028 if (mp1 == NULL) {
8029 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
8030 ip_drop_input("ipIfStatsInDiscards", mp, ill);
8031 freemsg(mp);
8032 return (NULL);
8033 }
8034 /* preserve the hardware checksum flags and data, if present */
8035 if (DB_CKSUMFLAGS(mp) != 0) {
8036 DB_CKSUMFLAGS(mp1) = DB_CKSUMFLAGS(mp);
8037 DB_CKSUMSTART(mp1) = DB_CKSUMSTART(mp);
8038 DB_CKSUMSTUFF(mp1) = DB_CKSUMSTUFF(mp);
8039 DB_CKSUMEND(mp1) = DB_CKSUMEND(mp);
8040 DB_CKSUM16(mp1) = DB_CKSUM16(mp);
8041 }
8042 freemsg(mp);
8043 return (mp1);
8044 }
8045
8046 static void
8047 ip_dlpi_error(ill_t *ill, t_uscalar_t prim, t_uscalar_t dl_err,
8048 t_uscalar_t err)
8049 {
8050 if (dl_err == DL_SYSERR) {
8051 (void) mi_strlog(ill->ill_rq, 1, SL_CONSOLE|SL_ERROR|SL_TRACE,
8052 "%s: %s failed: DL_SYSERR (errno %u)\n",
8053 ill->ill_name, dl_primstr(prim), err);
8054 return;
8055 }
8056
8057 (void) mi_strlog(ill->ill_rq, 1, SL_CONSOLE|SL_ERROR|SL_TRACE,
8058 "%s: %s failed: %s\n", ill->ill_name, dl_primstr(prim),
8059 dl_errstr(dl_err));
8060 }
8061
8062 /*
8063 * ip_rput_dlpi is called by ip_rput to handle all DLPI messages other
8064 * than DL_UNITDATA_IND messages. If we need to process this message
8065 * exclusively, we call qwriter_ip, in which case we also need to call
8066 * ill_refhold before that, since qwriter_ip does an ill_refrele.
8067 */
8068 void
8069 ip_rput_dlpi(ill_t *ill, mblk_t *mp)
8070 {
8071 dl_ok_ack_t *dloa = (dl_ok_ack_t *)mp->b_rptr;
8072 dl_error_ack_t *dlea = (dl_error_ack_t *)dloa;
8073 queue_t *q = ill->ill_rq;
8074 t_uscalar_t prim = dloa->dl_primitive;
8075 t_uscalar_t reqprim = DL_PRIM_INVAL;
8076
8077 DTRACE_PROBE3(ill__dlpi, char *, "ip_rput_dlpi",
8078 char *, dl_primstr(prim), ill_t *, ill);
8079 ip1dbg(("ip_rput_dlpi"));
8080
8081 /*
8082 * If we received an ACK but didn't send a request for it, then it
8083 * can't be part of any pending operation; discard up-front.
8084 */
8085 switch (prim) {
8086 case DL_ERROR_ACK:
8087 reqprim = dlea->dl_error_primitive;
8088 ip2dbg(("ip_rput_dlpi(%s): DL_ERROR_ACK for %s (0x%x): %s "
8089 "(0x%x), unix %u\n", ill->ill_name, dl_primstr(reqprim),
8090 reqprim, dl_errstr(dlea->dl_errno), dlea->dl_errno,
8091 dlea->dl_unix_errno));
8092 break;
8093 case DL_OK_ACK:
8094 reqprim = dloa->dl_correct_primitive;
8095 break;
8096 case DL_INFO_ACK:
8097 reqprim = DL_INFO_REQ;
8098 break;
8099 case DL_BIND_ACK:
8100 reqprim = DL_BIND_REQ;
8101 break;
8102 case DL_PHYS_ADDR_ACK:
8103 reqprim = DL_PHYS_ADDR_REQ;
8104 break;
8105 case DL_NOTIFY_ACK:
8106 reqprim = DL_NOTIFY_REQ;
8107 break;
8108 case DL_CAPABILITY_ACK:
8109 reqprim = DL_CAPABILITY_REQ;
8110 break;
8111 }
8112
8113 if (prim != DL_NOTIFY_IND) {
8114 if (reqprim == DL_PRIM_INVAL ||
8115 !ill_dlpi_pending(ill, reqprim)) {
8116 /* Not a DLPI message we support or expected */
8117 freemsg(mp);
8118 return;
8119 }
8120 ip1dbg(("ip_rput: received %s for %s\n", dl_primstr(prim),
8121 dl_primstr(reqprim)));
8122 }
8123
8124 switch (reqprim) {
8125 case DL_UNBIND_REQ:
8126 /*
8127 * NOTE: we mark the unbind as complete even if we got a
8128 * DL_ERROR_ACK, since there's not much else we can do.
8129 */
8130 mutex_enter(&ill->ill_lock);
8131 ill->ill_state_flags &= ~ILL_DL_UNBIND_IN_PROGRESS;
8132 cv_signal(&ill->ill_cv);
8133 mutex_exit(&ill->ill_lock);
8134 break;
8135
8136 case DL_ENABMULTI_REQ:
8137 if (prim == DL_OK_ACK) {
8138 if (ill->ill_dlpi_multicast_state == IDS_INPROGRESS)
8139 ill->ill_dlpi_multicast_state = IDS_OK;
8140 }
8141 break;
8142 }
8143
8144 /*
8145 * The message is one we're waiting for (or DL_NOTIFY_IND), but we
8146 * need to become writer to continue to process it. Because an
8147 * exclusive operation doesn't complete until replies to all queued
8148 * DLPI messages have been received, we know we're in the middle of an
8149 * exclusive operation and pass CUR_OP (except for DL_NOTIFY_IND).
8150 *
8151 * As required by qwriter_ip(), we refhold the ill; it will refrele.
8152 * Since this is on the ill stream we unconditionally bump up the
8153 * refcount without doing ILL_CAN_LOOKUP().
8154 */
8155 ill_refhold(ill);
8156 if (prim == DL_NOTIFY_IND)
8157 qwriter_ip(ill, q, mp, ip_rput_dlpi_writer, NEW_OP, B_FALSE);
8158 else
8159 qwriter_ip(ill, q, mp, ip_rput_dlpi_writer, CUR_OP, B_FALSE);
8160 }
8161
8162 /*
8163 * Handling of DLPI messages that require exclusive access to the ipsq.
8164 *
8165 * Need to do ipsq_pending_mp_get on ioctl completion, which could
8166 * happen here. (along with mi_copy_done)
8167 */
8168 /* ARGSUSED */
8169 static void
8170 ip_rput_dlpi_writer(ipsq_t *ipsq, queue_t *q, mblk_t *mp, void *dummy_arg)
8171 {
8172 dl_ok_ack_t *dloa = (dl_ok_ack_t *)mp->b_rptr;
8173 dl_error_ack_t *dlea = (dl_error_ack_t *)dloa;
8174 int err = 0;
8175 ill_t *ill = (ill_t *)q->q_ptr;
8176 ipif_t *ipif = NULL;
8177 mblk_t *mp1 = NULL;
8178 conn_t *connp = NULL;
8179 t_uscalar_t paddrreq;
8180 mblk_t *mp_hw;
8181 boolean_t success;
8182 boolean_t ioctl_aborted = B_FALSE;
8183 boolean_t log = B_TRUE;
8184
8185 DTRACE_PROBE3(ill__dlpi, char *, "ip_rput_dlpi_writer",
8186 char *, dl_primstr(dloa->dl_primitive), ill_t *, ill);
8187
8188 ip1dbg(("ip_rput_dlpi_writer .."));
8189 ASSERT(ipsq->ipsq_xop == ill->ill_phyint->phyint_ipsq->ipsq_xop);
8190 ASSERT(IAM_WRITER_ILL(ill));
8191
8192 ipif = ipsq->ipsq_xop->ipx_pending_ipif;
8193 /*
8194 * The current ioctl could have been aborted by the user and a new
8195 * ioctl to bring up another ill could have started. We could still
8196 * get a response from the driver later.
8197 */
8198 if (ipif != NULL && ipif->ipif_ill != ill)
8199 ioctl_aborted = B_TRUE;
8200
8201 switch (dloa->dl_primitive) {
8202 case DL_ERROR_ACK:
8203 ip1dbg(("ip_rput_dlpi_writer: got DL_ERROR_ACK for %s\n",
8204 dl_primstr(dlea->dl_error_primitive)));
8205
8206 DTRACE_PROBE3(ill__dlpi, char *, "ip_rput_dlpi_writer error",
8207 char *, dl_primstr(dlea->dl_error_primitive),
8208 ill_t *, ill);
8209
8210 switch (dlea->dl_error_primitive) {
8211 case DL_DISABMULTI_REQ:
8212 ill_dlpi_done(ill, dlea->dl_error_primitive);
8213 break;
8214 case DL_PROMISCON_REQ:
8215 case DL_PROMISCOFF_REQ:
8216 case DL_UNBIND_REQ:
8217 case DL_ATTACH_REQ:
8218 case DL_INFO_REQ:
8219 ill_dlpi_done(ill, dlea->dl_error_primitive);
8220 break;
8221 case DL_NOTIFY_REQ:
8222 ill_dlpi_done(ill, DL_NOTIFY_REQ);
8223 log = B_FALSE;
8224 break;
8225 case DL_PHYS_ADDR_REQ:
8226 /*
8227 * For IPv6 only, there are two additional
8228 * phys_addr_req's sent to the driver to get the
8229 * IPv6 token and lla. This allows IP to acquire
8230 * the hardware address format for a given interface
8231 * without having built in knowledge of the hardware
8232 * address. ill_phys_addr_pend keeps track of the last
8233 * DL_PAR sent so we know which response we are
8234 * dealing with. ill_dlpi_done will update
8235 * ill_phys_addr_pend when it sends the next req.
8236 * We don't complete the IOCTL until all three DL_PARs
8237 * have been attempted, so set *_len to 0 and break.
8238 */
8239 paddrreq = ill->ill_phys_addr_pend;
8240 ill_dlpi_done(ill, DL_PHYS_ADDR_REQ);
8241 if (paddrreq == DL_IPV6_TOKEN) {
8242 ill->ill_token_length = 0;
8243 log = B_FALSE;
8244 break;
8245 } else if (paddrreq == DL_IPV6_LINK_LAYER_ADDR) {
8246 ill->ill_nd_lla_len = 0;
8247 log = B_FALSE;
8248 break;
8249 }
8250 /*
8251 * Something went wrong with the DL_PHYS_ADDR_REQ.
8252 * We presumably have an IOCTL hanging out waiting
8253 * for completion. Find it and complete the IOCTL
8254 * with the error noted.
8255 * However, ill_dl_phys was called on an ill queue
8256 * (from SIOCSLIFNAME), thus conn_pending_ill is not
8257 * set. But the ioctl is known to be pending on ill_wq.
8258 */
8259 if (!ill->ill_ifname_pending)
8260 break;
8261 ill->ill_ifname_pending = 0;
8262 if (!ioctl_aborted)
8263 mp1 = ipsq_pending_mp_get(ipsq, &connp);
8264 if (mp1 != NULL) {
8265 /*
8266 * This operation (SIOCSLIFNAME) must have
8267 * happened on the ill. Assert there is no conn
8268 */
8269 ASSERT(connp == NULL);
8270 q = ill->ill_wq;
8271 }
8272 break;
8273 case DL_BIND_REQ:
8274 ill_dlpi_done(ill, DL_BIND_REQ);
8275 if (ill->ill_ifname_pending)
8276 break;
8277 mutex_enter(&ill->ill_lock);
8278 ill->ill_state_flags &= ~ILL_DOWN_IN_PROGRESS;
8279 mutex_exit(&ill->ill_lock);
8280 /*
8281 * Something went wrong with the bind. We presumably
8282 * have an IOCTL hanging out waiting for completion.
8283 * Find it, take down the interface that was coming
8284 * up, and complete the IOCTL with the error noted.
8285 */
8286 if (!ioctl_aborted)
8287 mp1 = ipsq_pending_mp_get(ipsq, &connp);
8288 if (mp1 != NULL) {
8289 /*
8290 * This might be a result of a DL_NOTE_REPLUMB
8291 * notification. In that case, connp is NULL.
8292 */
8293 if (connp != NULL)
8294 q = CONNP_TO_WQ(connp);
8295
8296 (void) ipif_down(ipif, NULL, NULL);
8297 /* error is set below the switch */
8298 }
8299 break;
8300 case DL_ENABMULTI_REQ:
8301 ill_dlpi_done(ill, DL_ENABMULTI_REQ);
8302
8303 if (ill->ill_dlpi_multicast_state == IDS_INPROGRESS)
8304 ill->ill_dlpi_multicast_state = IDS_FAILED;
8305 if (ill->ill_dlpi_multicast_state == IDS_FAILED) {
8306
8307 printf("ip: joining multicasts failed (%d)"
8308 " on %s - will use link layer "
8309 "broadcasts for multicast\n",
8310 dlea->dl_errno, ill->ill_name);
8311
8312 /*
8313 * Set up for multi_bcast; We are the
8314 * writer, so ok to access ill->ill_ipif
8315 * without any lock.
8316 */
8317 mutex_enter(&ill->ill_phyint->phyint_lock);
8318 ill->ill_phyint->phyint_flags |=
8319 PHYI_MULTI_BCAST;
8320 mutex_exit(&ill->ill_phyint->phyint_lock);
8321
8322 }
8323 freemsg(mp); /* Don't want to pass this up */
8324 return;
8325 case DL_CAPABILITY_REQ:
8326 ip1dbg(("ip_rput_dlpi_writer: got DL_ERROR_ACK for "
8327 "DL_CAPABILITY REQ\n"));
8328 if (ill->ill_dlpi_capab_state == IDCS_PROBE_SENT)
8329 ill->ill_dlpi_capab_state = IDCS_FAILED;
8330 ill_capability_done(ill);
8331 freemsg(mp);
8332 return;
8333 }
8334 /*
8335 * Note the error for IOCTL completion (mp1 is set when
8336 * ready to complete ioctl). If ill_ifname_pending_err is
8337 * set, an error occured during plumbing (ill_ifname_pending),
8338 * so we want to report that error.
8339 *
8340 * NOTE: there are two addtional DL_PHYS_ADDR_REQ's
8341 * (DL_IPV6_TOKEN and DL_IPV6_LINK_LAYER_ADDR) that are
8342 * expected to get errack'd if the driver doesn't support
8343 * these flags (e.g. ethernet). log will be set to B_FALSE
8344 * if these error conditions are encountered.
8345 */
8346 if (mp1 != NULL) {
8347 if (ill->ill_ifname_pending_err != 0) {
8348 err = ill->ill_ifname_pending_err;
8349 ill->ill_ifname_pending_err = 0;
8350 } else {
8351 err = dlea->dl_unix_errno ?
8352 dlea->dl_unix_errno : ENXIO;
8353 }
8354 /*
8355 * If we're plumbing an interface and an error hasn't already
8356 * been saved, set ill_ifname_pending_err to the error passed
8357 * up. Ignore the error if log is B_FALSE (see comment above).
8358 */
8359 } else if (log && ill->ill_ifname_pending &&
8360 ill->ill_ifname_pending_err == 0) {
8361 ill->ill_ifname_pending_err = dlea->dl_unix_errno ?
8362 dlea->dl_unix_errno : ENXIO;
8363 }
8364
8365 if (log)
8366 ip_dlpi_error(ill, dlea->dl_error_primitive,
8367 dlea->dl_errno, dlea->dl_unix_errno);
8368 break;
8369 case DL_CAPABILITY_ACK:
8370 ill_capability_ack(ill, mp);
8371 /*
8372 * The message has been handed off to ill_capability_ack
8373 * and must not be freed below
8374 */
8375 mp = NULL;
8376 break;
8377
8378 case DL_INFO_ACK:
8379 /* Call a routine to handle this one. */
8380 ill_dlpi_done(ill, DL_INFO_REQ);
8381 ip_ll_subnet_defaults(ill, mp);
8382 ASSERT(!MUTEX_HELD(&ill->ill_phyint->phyint_ipsq->ipsq_lock));
8383 return;
8384 case DL_BIND_ACK:
8385 /*
8386 * We should have an IOCTL waiting on this unless
8387 * sent by ill_dl_phys, in which case just return
8388 */
8389 ill_dlpi_done(ill, DL_BIND_REQ);
8390
8391 if (ill->ill_ifname_pending) {
8392 DTRACE_PROBE2(ip__rput__dlpi__ifname__pending,
8393 ill_t *, ill, mblk_t *, mp);
8394 break;
8395 }
8396 mutex_enter(&ill->ill_lock);
8397 ill->ill_dl_up = 1;
8398 ill->ill_state_flags &= ~ILL_DOWN_IN_PROGRESS;
8399 mutex_exit(&ill->ill_lock);
8400
8401 if (!ioctl_aborted)
8402 mp1 = ipsq_pending_mp_get(ipsq, &connp);
8403 if (mp1 == NULL) {
8404 DTRACE_PROBE1(ip__rput__dlpi__no__mblk, ill_t *, ill);
8405 break;
8406 }
8407 /*
8408 * mp1 was added by ill_dl_up(). if that is a result of
8409 * a DL_NOTE_REPLUMB notification, connp could be NULL.
8410 */
8411 if (connp != NULL)
8412 q = CONNP_TO_WQ(connp);
8413 /*
8414 * We are exclusive. So nothing can change even after
8415 * we get the pending mp.
8416 */
8417 ip1dbg(("ip_rput_dlpi: bind_ack %s\n", ill->ill_name));
8418 DTRACE_PROBE1(ip__rput__dlpi__bind__ack, ill_t *, ill);
8419 ill_nic_event_dispatch(ill, 0, NE_UP, NULL, 0);
8420
8421 /*
8422 * Now bring up the resolver; when that is complete, we'll
8423 * create IREs. Note that we intentionally mirror what
8424 * ipif_up() would have done, because we got here by way of
8425 * ill_dl_up(), which stopped ipif_up()'s processing.
8426 */
8427 if (ill->ill_isv6) {
8428 /*
8429 * v6 interfaces.
8430 * Unlike ARP which has to do another bind
8431 * and attach, once we get here we are
8432 * done with NDP
8433 */
8434 (void) ipif_resolver_up(ipif, Res_act_initial);
8435 if ((err = ipif_ndp_up(ipif, B_TRUE)) == 0)
8436 err = ipif_up_done_v6(ipif);
8437 } else if (ill->ill_net_type == IRE_IF_RESOLVER) {
8438 /*
8439 * ARP and other v4 external resolvers.
8440 * Leave the pending mblk intact so that
8441 * the ioctl completes in ip_rput().
8442 */
8443 if (connp != NULL)
8444 mutex_enter(&connp->conn_lock);
8445 mutex_enter(&ill->ill_lock);
8446 success = ipsq_pending_mp_add(connp, ipif, q, mp1, 0);
8447 mutex_exit(&ill->ill_lock);
8448 if (connp != NULL)
8449 mutex_exit(&connp->conn_lock);
8450 if (success) {
8451 err = ipif_resolver_up(ipif, Res_act_initial);
8452 if (err == EINPROGRESS) {
8453 freemsg(mp);
8454 return;
8455 }
8456 mp1 = ipsq_pending_mp_get(ipsq, &connp);
8457 } else {
8458 /* The conn has started closing */
8459 err = EINTR;
8460 }
8461 } else {
8462 /*
8463 * This one is complete. Reply to pending ioctl.
8464 */
8465 (void) ipif_resolver_up(ipif, Res_act_initial);
8466 err = ipif_up_done(ipif);
8467 }
8468
8469 if ((err == 0) && (ill->ill_up_ipifs)) {
8470 err = ill_up_ipifs(ill, q, mp1);
8471 if (err == EINPROGRESS) {
8472 freemsg(mp);
8473 return;
8474 }
8475 }
8476
8477 /*
8478 * If we have a moved ipif to bring up, and everything has
8479 * succeeded to this point, bring it up on the IPMP ill.
8480 * Otherwise, leave it down -- the admin can try to bring it
8481 * up by hand if need be.
8482 */
8483 if (ill->ill_move_ipif != NULL) {
8484 if (err != 0) {
8485 ill->ill_move_ipif = NULL;
8486 } else {
8487 ipif = ill->ill_move_ipif;
8488 ill->ill_move_ipif = NULL;
8489 err = ipif_up(ipif, q, mp1);
8490 if (err == EINPROGRESS) {
8491 freemsg(mp);
8492 return;
8493 }
8494 }
8495 }
8496 break;
8497
8498 case DL_NOTIFY_IND: {
8499 dl_notify_ind_t *notify = (dl_notify_ind_t *)mp->b_rptr;
8500 uint_t orig_mtu, orig_mc_mtu;
8501
8502 switch (notify->dl_notification) {
8503 case DL_NOTE_PHYS_ADDR:
8504 err = ill_set_phys_addr(ill, mp);
8505 break;
8506
8507 case DL_NOTE_REPLUMB:
8508 /*
8509 * Directly return after calling ill_replumb().
8510 * Note that we should not free mp as it is reused
8511 * in the ill_replumb() function.
8512 */
8513 err = ill_replumb(ill, mp);
8514 return;
8515
8516 case DL_NOTE_FASTPATH_FLUSH:
8517 nce_flush(ill, B_FALSE);
8518 break;
8519
8520 case DL_NOTE_SDU_SIZE:
8521 case DL_NOTE_SDU_SIZE2:
8522 /*
8523 * The dce and fragmentation code can cope with
8524 * this changing while packets are being sent.
8525 * When packets are sent ip_output will discover
8526 * a change.
8527 *
8528 * Change the MTU size of the interface.
8529 */
8530 mutex_enter(&ill->ill_lock);
8531 orig_mtu = ill->ill_mtu;
8532 orig_mc_mtu = ill->ill_mc_mtu;
8533 switch (notify->dl_notification) {
8534 case DL_NOTE_SDU_SIZE:
8535 ill->ill_current_frag =
8536 (uint_t)notify->dl_data;
8537 ill->ill_mc_mtu = (uint_t)notify->dl_data;
8538 break;
8539 case DL_NOTE_SDU_SIZE2:
8540 ill->ill_current_frag =
8541 (uint_t)notify->dl_data1;
8542 ill->ill_mc_mtu = (uint_t)notify->dl_data2;
8543 break;
8544 }
8545 if (ill->ill_current_frag > ill->ill_max_frag)
8546 ill->ill_max_frag = ill->ill_current_frag;
8547
8548 if (!(ill->ill_flags & ILLF_FIXEDMTU)) {
8549 ill->ill_mtu = ill->ill_current_frag;
8550
8551 /*
8552 * If ill_user_mtu was set (via
8553 * SIOCSLIFLNKINFO), clamp ill_mtu at it.
8554 */
8555 if (ill->ill_user_mtu != 0 &&
8556 ill->ill_user_mtu < ill->ill_mtu)
8557 ill->ill_mtu = ill->ill_user_mtu;
8558
8559 if (ill->ill_user_mtu != 0 &&
8560 ill->ill_user_mtu < ill->ill_mc_mtu)
8561 ill->ill_mc_mtu = ill->ill_user_mtu;
8562
8563 if (ill->ill_isv6) {
8564 if (ill->ill_mtu < IPV6_MIN_MTU)
8565 ill->ill_mtu = IPV6_MIN_MTU;
8566 if (ill->ill_mc_mtu < IPV6_MIN_MTU)
8567 ill->ill_mc_mtu = IPV6_MIN_MTU;
8568 } else {
8569 if (ill->ill_mtu < IP_MIN_MTU)
8570 ill->ill_mtu = IP_MIN_MTU;
8571 if (ill->ill_mc_mtu < IP_MIN_MTU)
8572 ill->ill_mc_mtu = IP_MIN_MTU;
8573 }
8574 } else if (ill->ill_mc_mtu > ill->ill_mtu) {
8575 ill->ill_mc_mtu = ill->ill_mtu;
8576 }
8577
8578 mutex_exit(&ill->ill_lock);
8579 /*
8580 * Make sure all dce_generation checks find out
8581 * that ill_mtu/ill_mc_mtu has changed.
8582 */
8583 if (orig_mtu != ill->ill_mtu ||
8584 orig_mc_mtu != ill->ill_mc_mtu) {
8585 dce_increment_all_generations(ill->ill_isv6,
8586 ill->ill_ipst);
8587 }
8588
8589 /*
8590 * Refresh IPMP meta-interface MTU if necessary.
8591 */
8592 if (IS_UNDER_IPMP(ill))
8593 ipmp_illgrp_refresh_mtu(ill->ill_grp);
8594 break;
8595
8596 case DL_NOTE_LINK_UP:
8597 case DL_NOTE_LINK_DOWN: {
8598 /*
8599 * We are writer. ill / phyint / ipsq assocs stable.
8600 * The RUNNING flag reflects the state of the link.
8601 */
8602 phyint_t *phyint = ill->ill_phyint;
8603 uint64_t new_phyint_flags;
8604 boolean_t changed = B_FALSE;
8605 boolean_t went_up;
8606
8607 went_up = notify->dl_notification == DL_NOTE_LINK_UP;
8608 mutex_enter(&phyint->phyint_lock);
8609
8610 new_phyint_flags = went_up ?
8611 phyint->phyint_flags | PHYI_RUNNING :
8612 phyint->phyint_flags & ~PHYI_RUNNING;
8613
8614 if (IS_IPMP(ill)) {
8615 new_phyint_flags = went_up ?
8616 new_phyint_flags & ~PHYI_FAILED :
8617 new_phyint_flags | PHYI_FAILED;
8618 }
8619
8620 if (new_phyint_flags != phyint->phyint_flags) {
8621 phyint->phyint_flags = new_phyint_flags;
8622 changed = B_TRUE;
8623 }
8624 mutex_exit(&phyint->phyint_lock);
8625 /*
8626 * ill_restart_dad handles the DAD restart and routing
8627 * socket notification logic.
8628 */
8629 if (changed) {
8630 ill_restart_dad(phyint->phyint_illv4, went_up);
8631 ill_restart_dad(phyint->phyint_illv6, went_up);
8632 }
8633 break;
8634 }
8635 case DL_NOTE_PROMISC_ON_PHYS: {
8636 phyint_t *phyint = ill->ill_phyint;
8637
8638 mutex_enter(&phyint->phyint_lock);
8639 phyint->phyint_flags |= PHYI_PROMISC;
8640 mutex_exit(&phyint->phyint_lock);
8641 break;
8642 }
8643 case DL_NOTE_PROMISC_OFF_PHYS: {
8644 phyint_t *phyint = ill->ill_phyint;
8645
8646 mutex_enter(&phyint->phyint_lock);
8647 phyint->phyint_flags &= ~PHYI_PROMISC;
8648 mutex_exit(&phyint->phyint_lock);
8649 break;
8650 }
8651 case DL_NOTE_CAPAB_RENEG:
8652 /*
8653 * Something changed on the driver side.
8654 * It wants us to renegotiate the capabilities
8655 * on this ill. One possible cause is the aggregation
8656 * interface under us where a port got added or
8657 * went away.
8658 *
8659 * If the capability negotiation is already done
8660 * or is in progress, reset the capabilities and
8661 * mark the ill's ill_capab_reneg to be B_TRUE,
8662 * so that when the ack comes back, we can start
8663 * the renegotiation process.
8664 *
8665 * Note that if ill_capab_reneg is already B_TRUE
8666 * (ill_dlpi_capab_state is IDS_UNKNOWN in this case),
8667 * the capability resetting request has been sent
8668 * and the renegotiation has not been started yet;
8669 * nothing needs to be done in this case.
8670 */
8671 ipsq_current_start(ipsq, ill->ill_ipif, 0);
8672 ill_capability_reset(ill, B_TRUE);
8673 ipsq_current_finish(ipsq);
8674 break;
8675
8676 case DL_NOTE_ALLOWED_IPS:
8677 ill_set_allowed_ips(ill, mp);
8678 break;
8679 default:
8680 ip0dbg(("ip_rput_dlpi_writer: unknown notification "
8681 "type 0x%x for DL_NOTIFY_IND\n",
8682 notify->dl_notification));
8683 break;
8684 }
8685
8686 /*
8687 * As this is an asynchronous operation, we
8688 * should not call ill_dlpi_done
8689 */
8690 break;
8691 }
8692 case DL_NOTIFY_ACK: {
8693 dl_notify_ack_t *noteack = (dl_notify_ack_t *)mp->b_rptr;
8694
8695 if (noteack->dl_notifications & DL_NOTE_LINK_UP)
8696 ill->ill_note_link = 1;
8697 ill_dlpi_done(ill, DL_NOTIFY_REQ);
8698 break;
8699 }
8700 case DL_PHYS_ADDR_ACK: {
8701 /*
8702 * As part of plumbing the interface via SIOCSLIFNAME,
8703 * ill_dl_phys() will queue a series of DL_PHYS_ADDR_REQs,
8704 * whose answers we receive here. As each answer is received,
8705 * we call ill_dlpi_done() to dispatch the next request as
8706 * we're processing the current one. Once all answers have
8707 * been received, we use ipsq_pending_mp_get() to dequeue the
8708 * outstanding IOCTL and reply to it. (Because ill_dl_phys()
8709 * is invoked from an ill queue, conn_oper_pending_ill is not
8710 * available, but we know the ioctl is pending on ill_wq.)
8711 */
8712 uint_t paddrlen, paddroff;
8713 uint8_t *addr;
8714
8715 paddrreq = ill->ill_phys_addr_pend;
8716 paddrlen = ((dl_phys_addr_ack_t *)mp->b_rptr)->dl_addr_length;
8717 paddroff = ((dl_phys_addr_ack_t *)mp->b_rptr)->dl_addr_offset;
8718 addr = mp->b_rptr + paddroff;
8719
8720 ill_dlpi_done(ill, DL_PHYS_ADDR_REQ);
8721 if (paddrreq == DL_IPV6_TOKEN) {
8722 /*
8723 * bcopy to low-order bits of ill_token
8724 *
8725 * XXX Temporary hack - currently, all known tokens
8726 * are 64 bits, so I'll cheat for the moment.
8727 */
8728 bcopy(addr, &ill->ill_token.s6_addr32[2], paddrlen);
8729 ill->ill_token_length = paddrlen;
8730 break;
8731 } else if (paddrreq == DL_IPV6_LINK_LAYER_ADDR) {
8732 ASSERT(ill->ill_nd_lla_mp == NULL);
8733 ill_set_ndmp(ill, mp, paddroff, paddrlen);
8734 mp = NULL;
8735 break;
8736 } else if (paddrreq == DL_CURR_DEST_ADDR) {
8737 ASSERT(ill->ill_dest_addr_mp == NULL);
8738 ill->ill_dest_addr_mp = mp;
8739 ill->ill_dest_addr = addr;
8740 mp = NULL;
8741 if (ill->ill_isv6) {
8742 ill_setdesttoken(ill);
8743 ipif_setdestlinklocal(ill->ill_ipif);
8744 }
8745 break;
8746 }
8747
8748 ASSERT(paddrreq == DL_CURR_PHYS_ADDR);
8749 ASSERT(ill->ill_phys_addr_mp == NULL);
8750 if (!ill->ill_ifname_pending)
8751 break;
8752 ill->ill_ifname_pending = 0;
8753 if (!ioctl_aborted)
8754 mp1 = ipsq_pending_mp_get(ipsq, &connp);
8755 if (mp1 != NULL) {
8756 ASSERT(connp == NULL);
8757 q = ill->ill_wq;
8758 }
8759 /*
8760 * If any error acks received during the plumbing sequence,
8761 * ill_ifname_pending_err will be set. Break out and send up
8762 * the error to the pending ioctl.
8763 */
8764 if (ill->ill_ifname_pending_err != 0) {
8765 err = ill->ill_ifname_pending_err;
8766 ill->ill_ifname_pending_err = 0;
8767 break;
8768 }
8769
8770 ill->ill_phys_addr_mp = mp;
8771 ill->ill_phys_addr = (paddrlen == 0 ? NULL : addr);
8772 mp = NULL;
8773
8774 /*
8775 * If paddrlen or ill_phys_addr_length is zero, the DLPI
8776 * provider doesn't support physical addresses. We check both
8777 * paddrlen and ill_phys_addr_length because sppp (PPP) does
8778 * not have physical addresses, but historically adversises a
8779 * physical address length of 0 in its DL_INFO_ACK, but 6 in
8780 * its DL_PHYS_ADDR_ACK.
8781 */
8782 if (paddrlen == 0 || ill->ill_phys_addr_length == 0) {
8783 ill->ill_phys_addr = NULL;
8784 } else if (paddrlen != ill->ill_phys_addr_length) {
8785 ip0dbg(("DL_PHYS_ADDR_ACK: got addrlen %d, expected %d",
8786 paddrlen, ill->ill_phys_addr_length));
8787 err = EINVAL;
8788 break;
8789 }
8790
8791 if (ill->ill_nd_lla_mp == NULL) {
8792 if ((mp_hw = copyb(ill->ill_phys_addr_mp)) == NULL) {
8793 err = ENOMEM;
8794 break;
8795 }
8796 ill_set_ndmp(ill, mp_hw, paddroff, paddrlen);
8797 }
8798
8799 if (ill->ill_isv6) {
8800 ill_setdefaulttoken(ill);
8801 ipif_setlinklocal(ill->ill_ipif);
8802 }
8803 break;
8804 }
8805 case DL_OK_ACK:
8806 ip2dbg(("DL_OK_ACK %s (0x%x)\n",
8807 dl_primstr((int)dloa->dl_correct_primitive),
8808 dloa->dl_correct_primitive));
8809 DTRACE_PROBE3(ill__dlpi, char *, "ip_rput_dlpi_writer ok",
8810 char *, dl_primstr(dloa->dl_correct_primitive),
8811 ill_t *, ill);
8812
8813 switch (dloa->dl_correct_primitive) {
8814 case DL_ENABMULTI_REQ:
8815 case DL_DISABMULTI_REQ:
8816 ill_dlpi_done(ill, dloa->dl_correct_primitive);
8817 break;
8818 case DL_PROMISCON_REQ:
8819 case DL_PROMISCOFF_REQ:
8820 case DL_UNBIND_REQ:
8821 case DL_ATTACH_REQ:
8822 ill_dlpi_done(ill, dloa->dl_correct_primitive);
8823 break;
8824 }
8825 break;
8826 default:
8827 break;
8828 }
8829
8830 freemsg(mp);
8831 if (mp1 == NULL)
8832 return;
8833
8834 /*
8835 * The operation must complete without EINPROGRESS since
8836 * ipsq_pending_mp_get() has removed the mblk (mp1). Otherwise,
8837 * the operation will be stuck forever inside the IPSQ.
8838 */
8839 ASSERT(err != EINPROGRESS);
8840
8841 DTRACE_PROBE4(ipif__ioctl, char *, "ip_rput_dlpi_writer finish",
8842 int, ipsq->ipsq_xop->ipx_current_ioctl, ill_t *, ill,
8843 ipif_t *, NULL);
8844
8845 switch (ipsq->ipsq_xop->ipx_current_ioctl) {
8846 case 0:
8847 ipsq_current_finish(ipsq);
8848 break;
8849
8850 case SIOCSLIFNAME:
8851 case IF_UNITSEL: {
8852 ill_t *ill_other = ILL_OTHER(ill);
8853
8854 /*
8855 * If SIOCSLIFNAME or IF_UNITSEL is about to succeed, and the
8856 * ill has a peer which is in an IPMP group, then place ill
8857 * into the same group. One catch: although ifconfig plumbs
8858 * the appropriate IPMP meta-interface prior to plumbing this
8859 * ill, it is possible for multiple ifconfig applications to
8860 * race (or for another application to adjust plumbing), in
8861 * which case the IPMP meta-interface we need will be missing.
8862 * If so, kick the phyint out of the group.
8863 */
8864 if (err == 0 && ill_other != NULL && IS_UNDER_IPMP(ill_other)) {
8865 ipmp_grp_t *grp = ill->ill_phyint->phyint_grp;
8866 ipmp_illgrp_t *illg;
8867
8868 illg = ill->ill_isv6 ? grp->gr_v6 : grp->gr_v4;
8869 if (illg == NULL)
8870 ipmp_phyint_leave_grp(ill->ill_phyint);
8871 else
8872 ipmp_ill_join_illgrp(ill, illg);
8873 }
8874
8875 if (ipsq->ipsq_xop->ipx_current_ioctl == IF_UNITSEL)
8876 ip_ioctl_finish(q, mp1, err, NO_COPYOUT, ipsq);
8877 else
8878 ip_ioctl_finish(q, mp1, err, COPYOUT, ipsq);
8879 break;
8880 }
8881 case SIOCLIFADDIF:
8882 ip_ioctl_finish(q, mp1, err, COPYOUT, ipsq);
8883 break;
8884
8885 default:
8886 ip_ioctl_finish(q, mp1, err, NO_COPYOUT, ipsq);
8887 break;
8888 }
8889 }
8890
8891 /*
8892 * ip_rput_other is called by ip_rput to handle messages modifying the global
8893 * state in IP. If 'ipsq' is non-NULL, caller is writer on it.
8894 */
8895 /* ARGSUSED */
8896 void
8897 ip_rput_other(ipsq_t *ipsq, queue_t *q, mblk_t *mp, void *dummy_arg)
8898 {
8899 ill_t *ill = q->q_ptr;
8900 struct iocblk *iocp;
8901
8902 ip1dbg(("ip_rput_other "));
8903 if (ipsq != NULL) {
8904 ASSERT(IAM_WRITER_IPSQ(ipsq));
8905 ASSERT(ipsq->ipsq_xop ==
8906 ill->ill_phyint->phyint_ipsq->ipsq_xop);
8907 }
8908
8909 switch (mp->b_datap->db_type) {
8910 case M_ERROR:
8911 case M_HANGUP:
8912 /*
8913 * The device has a problem. We force the ILL down. It can
8914 * be brought up again manually using SIOCSIFFLAGS (via
8915 * ifconfig or equivalent).
8916 */
8917 ASSERT(ipsq != NULL);
8918 if (mp->b_rptr < mp->b_wptr)
8919 ill->ill_error = (int)(*mp->b_rptr & 0xFF);
8920 if (ill->ill_error == 0)
8921 ill->ill_error = ENXIO;
8922 if (!ill_down_start(q, mp))
8923 return;
8924 ipif_all_down_tail(ipsq, q, mp, NULL);
8925 break;
8926 case M_IOCNAK: {
8927 iocp = (struct iocblk *)mp->b_rptr;
8928
8929 ASSERT(iocp->ioc_cmd == DL_IOC_HDR_INFO);
8930 /*
8931 * If this was the first attempt, turn off the fastpath
8932 * probing.
8933 */
8934 mutex_enter(&ill->ill_lock);
8935 if (ill->ill_dlpi_fastpath_state == IDS_INPROGRESS) {
8936 ill->ill_dlpi_fastpath_state = IDS_FAILED;
8937 mutex_exit(&ill->ill_lock);
8938 /*
8939 * don't flush the nce_t entries: we use them
8940 * as an index to the ncec itself.
8941 */
8942 ip1dbg(("ip_rput: DLPI fastpath off on interface %s\n",
8943 ill->ill_name));
8944 } else {
8945 mutex_exit(&ill->ill_lock);
8946 }
8947 freemsg(mp);
8948 break;
8949 }
8950 default:
8951 ASSERT(0);
8952 break;
8953 }
8954 }
8955
8956 /*
8957 * Update any source route, record route or timestamp options
8958 * When it fails it has consumed the message and BUMPed the MIB.
8959 */
8960 boolean_t
8961 ip_forward_options(mblk_t *mp, ipha_t *ipha, ill_t *dst_ill,
8962 ip_recv_attr_t *ira)
8963 {
8964 ipoptp_t opts;
8965 uchar_t *opt;
8966 uint8_t optval;
8967 uint8_t optlen;
8968 ipaddr_t dst;
8969 ipaddr_t ifaddr;
8970 uint32_t ts;
8971 timestruc_t now;
8972 ip_stack_t *ipst = ira->ira_ill->ill_ipst;
8973
8974 ip2dbg(("ip_forward_options\n"));
8975 dst = ipha->ipha_dst;
8976 for (optval = ipoptp_first(&opts, ipha);
8977 optval != IPOPT_EOL;
8978 optval = ipoptp_next(&opts)) {
8979 ASSERT((opts.ipoptp_flags & IPOPTP_ERROR) == 0);
8980 opt = opts.ipoptp_cur;
8981 optlen = opts.ipoptp_len;
8982 ip2dbg(("ip_forward_options: opt %d, len %d\n",
8983 optval, opts.ipoptp_len));
8984 switch (optval) {
8985 uint32_t off;
8986 case IPOPT_SSRR:
8987 case IPOPT_LSRR:
8988 /* Check if adminstratively disabled */
8989 if (!ipst->ips_ip_forward_src_routed) {
8990 BUMP_MIB(dst_ill->ill_ip_mib,
8991 ipIfStatsForwProhibits);
8992 ip_drop_input("ICMP_SOURCE_ROUTE_FAILED",
8993 mp, dst_ill);
8994 icmp_unreachable(mp, ICMP_SOURCE_ROUTE_FAILED,
8995 ira);
8996 return (B_FALSE);
8997 }
8998 if (ip_type_v4(dst, ipst) != IRE_LOCAL) {
8999 /*
9000 * Must be partial since ip_input_options
9001 * checked for strict.
9002 */
9003 break;
9004 }
9005 off = opt[IPOPT_OFFSET];
9006 off--;
9007 redo_srr:
9008 if (optlen < IP_ADDR_LEN ||
9009 off > optlen - IP_ADDR_LEN) {
9010 /* End of source route */
9011 ip1dbg((
9012 "ip_forward_options: end of SR\n"));
9013 break;
9014 }
9015 /* Pick a reasonable address on the outbound if */
9016 ASSERT(dst_ill != NULL);
9017 if (ip_select_source_v4(dst_ill, INADDR_ANY, dst,
9018 INADDR_ANY, ALL_ZONES, ipst, &ifaddr, NULL,
9019 NULL) != 0) {
9020 /* No source! Shouldn't happen */
9021 ifaddr = INADDR_ANY;
9022 }
9023 bcopy((char *)opt + off, &dst, IP_ADDR_LEN);
9024 bcopy(&ifaddr, (char *)opt + off, IP_ADDR_LEN);
9025 ip1dbg(("ip_forward_options: next hop 0x%x\n",
9026 ntohl(dst)));
9027
9028 /*
9029 * Check if our address is present more than
9030 * once as consecutive hops in source route.
9031 */
9032 if (ip_type_v4(dst, ipst) == IRE_LOCAL) {
9033 off += IP_ADDR_LEN;
9034 opt[IPOPT_OFFSET] += IP_ADDR_LEN;
9035 goto redo_srr;
9036 }
9037 ipha->ipha_dst = dst;
9038 opt[IPOPT_OFFSET] += IP_ADDR_LEN;
9039 break;
9040 case IPOPT_RR:
9041 off = opt[IPOPT_OFFSET];
9042 off--;
9043 if (optlen < IP_ADDR_LEN ||
9044 off > optlen - IP_ADDR_LEN) {
9045 /* No more room - ignore */
9046 ip1dbg((
9047 "ip_forward_options: end of RR\n"));
9048 break;
9049 }
9050 /* Pick a reasonable address on the outbound if */
9051 ASSERT(dst_ill != NULL);
9052 if (ip_select_source_v4(dst_ill, INADDR_ANY, dst,
9053 INADDR_ANY, ALL_ZONES, ipst, &ifaddr, NULL,
9054 NULL) != 0) {
9055 /* No source! Shouldn't happen */
9056 ifaddr = INADDR_ANY;
9057 }
9058 bcopy(&ifaddr, (char *)opt + off, IP_ADDR_LEN);
9059 opt[IPOPT_OFFSET] += IP_ADDR_LEN;
9060 break;
9061 case IPOPT_TS:
9062 /* Insert timestamp if there is room */
9063 switch (opt[IPOPT_POS_OV_FLG] & 0x0F) {
9064 case IPOPT_TS_TSONLY:
9065 off = IPOPT_TS_TIMELEN;
9066 break;
9067 case IPOPT_TS_PRESPEC:
9068 case IPOPT_TS_PRESPEC_RFC791:
9069 /* Verify that the address matched */
9070 off = opt[IPOPT_OFFSET] - 1;
9071 bcopy((char *)opt + off, &dst, IP_ADDR_LEN);
9072 if (ip_type_v4(dst, ipst) != IRE_LOCAL) {
9073 /* Not for us */
9074 break;
9075 }
9076 /* FALLTHRU */
9077 case IPOPT_TS_TSANDADDR:
9078 off = IP_ADDR_LEN + IPOPT_TS_TIMELEN;
9079 break;
9080 default:
9081 /*
9082 * ip_*put_options should have already
9083 * dropped this packet.
9084 */
9085 cmn_err(CE_PANIC, "ip_forward_options: "
9086 "unknown IT - bug in ip_input_options?\n");
9087 return (B_TRUE); /* Keep "lint" happy */
9088 }
9089 if (opt[IPOPT_OFFSET] - 1 + off > optlen) {
9090 /* Increase overflow counter */
9091 off = (opt[IPOPT_POS_OV_FLG] >> 4) + 1;
9092 opt[IPOPT_POS_OV_FLG] =
9093 (uint8_t)((opt[IPOPT_POS_OV_FLG] & 0x0F) |
9094 (off << 4));
9095 break;
9096 }
9097 off = opt[IPOPT_OFFSET] - 1;
9098 switch (opt[IPOPT_POS_OV_FLG] & 0x0F) {
9099 case IPOPT_TS_PRESPEC:
9100 case IPOPT_TS_PRESPEC_RFC791:
9101 case IPOPT_TS_TSANDADDR:
9102 /* Pick a reasonable addr on the outbound if */
9103 ASSERT(dst_ill != NULL);
9104 if (ip_select_source_v4(dst_ill, INADDR_ANY,
9105 dst, INADDR_ANY, ALL_ZONES, ipst, &ifaddr,
9106 NULL, NULL) != 0) {
9107 /* No source! Shouldn't happen */
9108 ifaddr = INADDR_ANY;
9109 }
9110 bcopy(&ifaddr, (char *)opt + off, IP_ADDR_LEN);
9111 opt[IPOPT_OFFSET] += IP_ADDR_LEN;
9112 /* FALLTHRU */
9113 case IPOPT_TS_TSONLY:
9114 off = opt[IPOPT_OFFSET] - 1;
9115 /* Compute # of milliseconds since midnight */
9116 gethrestime(&now);
9117 ts = (now.tv_sec % (24 * 60 * 60)) * 1000 +
9118 now.tv_nsec / (NANOSEC / MILLISEC);
9119 bcopy(&ts, (char *)opt + off, IPOPT_TS_TIMELEN);
9120 opt[IPOPT_OFFSET] += IPOPT_TS_TIMELEN;
9121 break;
9122 }
9123 break;
9124 }
9125 }
9126 return (B_TRUE);
9127 }
9128
9129 /*
9130 * Call ill_frag_timeout to do garbage collection. ill_frag_timeout
9131 * returns 'true' if there are still fragments left on the queue, in
9132 * which case we restart the timer.
9133 */
9134 void
9135 ill_frag_timer(void *arg)
9136 {
9137 ill_t *ill = (ill_t *)arg;
9138 boolean_t frag_pending;
9139 ip_stack_t *ipst = ill->ill_ipst;
9140 time_t timeout;
9141
9142 mutex_enter(&ill->ill_lock);
9143 ASSERT(!ill->ill_fragtimer_executing);
9144 if (ill->ill_state_flags & ILL_CONDEMNED) {
9145 ill->ill_frag_timer_id = 0;
9146 mutex_exit(&ill->ill_lock);
9147 return;
9148 }
9149 ill->ill_fragtimer_executing = 1;
9150 mutex_exit(&ill->ill_lock);
9151
9152 timeout = (ill->ill_isv6 ? ipst->ips_ipv6_reassembly_timeout :
9153 ipst->ips_ip_reassembly_timeout);
9154
9155 frag_pending = ill_frag_timeout(ill, timeout);
9156
9157 /*
9158 * Restart the timer, if we have fragments pending or if someone
9159 * wanted us to be scheduled again.
9160 */
9161 mutex_enter(&ill->ill_lock);
9162 ill->ill_fragtimer_executing = 0;
9163 ill->ill_frag_timer_id = 0;
9164 if (frag_pending || ill->ill_fragtimer_needrestart)
9165 ill_frag_timer_start(ill);
9166 mutex_exit(&ill->ill_lock);
9167 }
9168
9169 void
9170 ill_frag_timer_start(ill_t *ill)
9171 {
9172 ip_stack_t *ipst = ill->ill_ipst;
9173 clock_t timeo_ms;
9174
9175 ASSERT(MUTEX_HELD(&ill->ill_lock));
9176
9177 /* If the ill is closing or opening don't proceed */
9178 if (ill->ill_state_flags & ILL_CONDEMNED)
9179 return;
9180
9181 if (ill->ill_fragtimer_executing) {
9182 /*
9183 * ill_frag_timer is currently executing. Just record the
9184 * the fact that we want the timer to be restarted.
9185 * ill_frag_timer will post a timeout before it returns,
9186 * ensuring it will be called again.
9187 */
9188 ill->ill_fragtimer_needrestart = 1;
9189 return;
9190 }
9191
9192 if (ill->ill_frag_timer_id == 0) {
9193 timeo_ms = (ill->ill_isv6 ? ipst->ips_ipv6_reassembly_timeout :
9194 ipst->ips_ip_reassembly_timeout) * SECONDS;
9195
9196 /*
9197 * The timer is neither running nor is the timeout handler
9198 * executing. Post a timeout so that ill_frag_timer will be
9199 * called
9200 */
9201 ill->ill_frag_timer_id = timeout(ill_frag_timer, ill,
9202 MSEC_TO_TICK(timeo_ms >> 1));
9203 ill->ill_fragtimer_needrestart = 0;
9204 }
9205 }
9206
9207 /*
9208 * Update any source route, record route or timestamp options.
9209 * Check that we are at end of strict source route.
9210 * The options have already been checked for sanity in ip_input_options().
9211 */
9212 boolean_t
9213 ip_input_local_options(mblk_t *mp, ipha_t *ipha, ip_recv_attr_t *ira)
9214 {
9215 ipoptp_t opts;
9216 uchar_t *opt;
9217 uint8_t optval;
9218 uint8_t optlen;
9219 ipaddr_t dst;
9220 ipaddr_t ifaddr;
9221 uint32_t ts;
9222 timestruc_t now;
9223 ill_t *ill = ira->ira_ill;
9224 ip_stack_t *ipst = ill->ill_ipst;
9225
9226 ip2dbg(("ip_input_local_options\n"));
9227
9228 for (optval = ipoptp_first(&opts, ipha);
9229 optval != IPOPT_EOL;
9230 optval = ipoptp_next(&opts)) {
9231 ASSERT((opts.ipoptp_flags & IPOPTP_ERROR) == 0);
9232 opt = opts.ipoptp_cur;
9233 optlen = opts.ipoptp_len;
9234 ip2dbg(("ip_input_local_options: opt %d, len %d\n",
9235 optval, optlen));
9236 switch (optval) {
9237 uint32_t off;
9238 case IPOPT_SSRR:
9239 case IPOPT_LSRR:
9240 off = opt[IPOPT_OFFSET];
9241 off--;
9242 if (optlen < IP_ADDR_LEN ||
9243 off > optlen - IP_ADDR_LEN) {
9244 /* End of source route */
9245 ip1dbg(("ip_input_local_options: end of SR\n"));
9246 break;
9247 }
9248 /*
9249 * This will only happen if two consecutive entries
9250 * in the source route contains our address or if
9251 * it is a packet with a loose source route which
9252 * reaches us before consuming the whole source route
9253 */
9254 ip1dbg(("ip_input_local_options: not end of SR\n"));
9255 if (optval == IPOPT_SSRR) {
9256 goto bad_src_route;
9257 }
9258 /*
9259 * Hack: instead of dropping the packet truncate the
9260 * source route to what has been used by filling the
9261 * rest with IPOPT_NOP.
9262 */
9263 opt[IPOPT_OLEN] = (uint8_t)off;
9264 while (off < optlen) {
9265 opt[off++] = IPOPT_NOP;
9266 }
9267 break;
9268 case IPOPT_RR:
9269 off = opt[IPOPT_OFFSET];
9270 off--;
9271 if (optlen < IP_ADDR_LEN ||
9272 off > optlen - IP_ADDR_LEN) {
9273 /* No more room - ignore */
9274 ip1dbg((
9275 "ip_input_local_options: end of RR\n"));
9276 break;
9277 }
9278 /* Pick a reasonable address on the outbound if */
9279 if (ip_select_source_v4(ill, INADDR_ANY, ipha->ipha_dst,
9280 INADDR_ANY, ALL_ZONES, ipst, &ifaddr, NULL,
9281 NULL) != 0) {
9282 /* No source! Shouldn't happen */
9283 ifaddr = INADDR_ANY;
9284 }
9285 bcopy(&ifaddr, (char *)opt + off, IP_ADDR_LEN);
9286 opt[IPOPT_OFFSET] += IP_ADDR_LEN;
9287 break;
9288 case IPOPT_TS:
9289 /* Insert timestamp if there is romm */
9290 switch (opt[IPOPT_POS_OV_FLG] & 0x0F) {
9291 case IPOPT_TS_TSONLY:
9292 off = IPOPT_TS_TIMELEN;
9293 break;
9294 case IPOPT_TS_PRESPEC:
9295 case IPOPT_TS_PRESPEC_RFC791:
9296 /* Verify that the address matched */
9297 off = opt[IPOPT_OFFSET] - 1;
9298 bcopy((char *)opt + off, &dst, IP_ADDR_LEN);
9299 if (ip_type_v4(dst, ipst) != IRE_LOCAL) {
9300 /* Not for us */
9301 break;
9302 }
9303 /* FALLTHRU */
9304 case IPOPT_TS_TSANDADDR:
9305 off = IP_ADDR_LEN + IPOPT_TS_TIMELEN;
9306 break;
9307 default:
9308 /*
9309 * ip_*put_options should have already
9310 * dropped this packet.
9311 */
9312 cmn_err(CE_PANIC, "ip_input_local_options: "
9313 "unknown IT - bug in ip_input_options?\n");
9314 return (B_TRUE); /* Keep "lint" happy */
9315 }
9316 if (opt[IPOPT_OFFSET] - 1 + off > optlen) {
9317 /* Increase overflow counter */
9318 off = (opt[IPOPT_POS_OV_FLG] >> 4) + 1;
9319 opt[IPOPT_POS_OV_FLG] =
9320 (uint8_t)((opt[IPOPT_POS_OV_FLG] & 0x0F) |
9321 (off << 4));
9322 break;
9323 }
9324 off = opt[IPOPT_OFFSET] - 1;
9325 switch (opt[IPOPT_POS_OV_FLG] & 0x0F) {
9326 case IPOPT_TS_PRESPEC:
9327 case IPOPT_TS_PRESPEC_RFC791:
9328 case IPOPT_TS_TSANDADDR:
9329 /* Pick a reasonable addr on the outbound if */
9330 if (ip_select_source_v4(ill, INADDR_ANY,
9331 ipha->ipha_dst, INADDR_ANY, ALL_ZONES, ipst,
9332 &ifaddr, NULL, NULL) != 0) {
9333 /* No source! Shouldn't happen */
9334 ifaddr = INADDR_ANY;
9335 }
9336 bcopy(&ifaddr, (char *)opt + off, IP_ADDR_LEN);
9337 opt[IPOPT_OFFSET] += IP_ADDR_LEN;
9338 /* FALLTHRU */
9339 case IPOPT_TS_TSONLY:
9340 off = opt[IPOPT_OFFSET] - 1;
9341 /* Compute # of milliseconds since midnight */
9342 gethrestime(&now);
9343 ts = (now.tv_sec % (24 * 60 * 60)) * 1000 +
9344 now.tv_nsec / (NANOSEC / MILLISEC);
9345 bcopy(&ts, (char *)opt + off, IPOPT_TS_TIMELEN);
9346 opt[IPOPT_OFFSET] += IPOPT_TS_TIMELEN;
9347 break;
9348 }
9349 break;
9350 }
9351 }
9352 return (B_TRUE);
9353
9354 bad_src_route:
9355 /* make sure we clear any indication of a hardware checksum */
9356 DB_CKSUMFLAGS(mp) = 0;
9357 ip_drop_input("ICMP_SOURCE_ROUTE_FAILED", mp, ill);
9358 icmp_unreachable(mp, ICMP_SOURCE_ROUTE_FAILED, ira);
9359 return (B_FALSE);
9360
9361 }
9362
9363 /*
9364 * Process IP options in an inbound packet. Always returns the nexthop.
9365 * Normally this is the passed in nexthop, but if there is an option
9366 * that effects the nexthop (such as a source route) that will be returned.
9367 * Sets *errorp if there is an error, in which case an ICMP error has been sent
9368 * and mp freed.
9369 */
9370 ipaddr_t
9371 ip_input_options(ipha_t *ipha, ipaddr_t dst, mblk_t *mp,
9372 ip_recv_attr_t *ira, int *errorp)
9373 {
9374 ip_stack_t *ipst = ira->ira_ill->ill_ipst;
9375 ipoptp_t opts;
9376 uchar_t *opt;
9377 uint8_t optval;
9378 uint8_t optlen;
9379 intptr_t code = 0;
9380 ire_t *ire;
9381
9382 ip2dbg(("ip_input_options\n"));
9383 *errorp = 0;
9384 for (optval = ipoptp_first(&opts, ipha);
9385 optval != IPOPT_EOL;
9386 optval = ipoptp_next(&opts)) {
9387 opt = opts.ipoptp_cur;
9388 optlen = opts.ipoptp_len;
9389 ip2dbg(("ip_input_options: opt %d, len %d\n",
9390 optval, optlen));
9391 /*
9392 * Note: we need to verify the checksum before we
9393 * modify anything thus this routine only extracts the next
9394 * hop dst from any source route.
9395 */
9396 switch (optval) {
9397 uint32_t off;
9398 case IPOPT_SSRR:
9399 case IPOPT_LSRR:
9400 if (ip_type_v4(dst, ipst) != IRE_LOCAL) {
9401 if (optval == IPOPT_SSRR) {
9402 ip1dbg(("ip_input_options: not next"
9403 " strict source route 0x%x\n",
9404 ntohl(dst)));
9405 code = (char *)&ipha->ipha_dst -
9406 (char *)ipha;
9407 goto param_prob; /* RouterReq's */
9408 }
9409 ip2dbg(("ip_input_options: "
9410 "not next source route 0x%x\n",
9411 ntohl(dst)));
9412 break;
9413 }
9414
9415 if ((opts.ipoptp_flags & IPOPTP_ERROR) != 0) {
9416 ip1dbg((
9417 "ip_input_options: bad option offset\n"));
9418 code = (char *)&opt[IPOPT_OLEN] -
9419 (char *)ipha;
9420 goto param_prob;
9421 }
9422 off = opt[IPOPT_OFFSET];
9423 off--;
9424 redo_srr:
9425 if (optlen < IP_ADDR_LEN ||
9426 off > optlen - IP_ADDR_LEN) {
9427 /* End of source route */
9428 ip1dbg(("ip_input_options: end of SR\n"));
9429 break;
9430 }
9431 bcopy((char *)opt + off, &dst, IP_ADDR_LEN);
9432 ip1dbg(("ip_input_options: next hop 0x%x\n",
9433 ntohl(dst)));
9434
9435 /*
9436 * Check if our address is present more than
9437 * once as consecutive hops in source route.
9438 * XXX verify per-interface ip_forwarding
9439 * for source route?
9440 */
9441 if (ip_type_v4(dst, ipst) == IRE_LOCAL) {
9442 off += IP_ADDR_LEN;
9443 goto redo_srr;
9444 }
9445
9446 if (dst == htonl(INADDR_LOOPBACK)) {
9447 ip1dbg(("ip_input_options: loopback addr in "
9448 "source route!\n"));
9449 goto bad_src_route;
9450 }
9451 /*
9452 * For strict: verify that dst is directly
9453 * reachable.
9454 */
9455 if (optval == IPOPT_SSRR) {
9456 ire = ire_ftable_lookup_v4(dst, 0, 0,
9457 IRE_INTERFACE, NULL, ALL_ZONES,
9458 ira->ira_tsl,
9459 MATCH_IRE_TYPE | MATCH_IRE_SECATTR, 0, ipst,
9460 NULL);
9461 if (ire == NULL) {
9462 ip1dbg(("ip_input_options: SSRR not "
9463 "directly reachable: 0x%x\n",
9464 ntohl(dst)));
9465 goto bad_src_route;
9466 }
9467 ire_refrele(ire);
9468 }
9469 /*
9470 * Defer update of the offset and the record route
9471 * until the packet is forwarded.
9472 */
9473 break;
9474 case IPOPT_RR:
9475 if ((opts.ipoptp_flags & IPOPTP_ERROR) != 0) {
9476 ip1dbg((
9477 "ip_input_options: bad option offset\n"));
9478 code = (char *)&opt[IPOPT_OLEN] -
9479 (char *)ipha;
9480 goto param_prob;
9481 }
9482 break;
9483 case IPOPT_TS:
9484 /*
9485 * Verify that length >= 5 and that there is either
9486 * room for another timestamp or that the overflow
9487 * counter is not maxed out.
9488 */
9489 code = (char *)&opt[IPOPT_OLEN] - (char *)ipha;
9490 if (optlen < IPOPT_MINLEN_IT) {
9491 goto param_prob;
9492 }
9493 if ((opts.ipoptp_flags & IPOPTP_ERROR) != 0) {
9494 ip1dbg((
9495 "ip_input_options: bad option offset\n"));
9496 code = (char *)&opt[IPOPT_OFFSET] -
9497 (char *)ipha;
9498 goto param_prob;
9499 }
9500 switch (opt[IPOPT_POS_OV_FLG] & 0x0F) {
9501 case IPOPT_TS_TSONLY:
9502 off = IPOPT_TS_TIMELEN;
9503 break;
9504 case IPOPT_TS_TSANDADDR:
9505 case IPOPT_TS_PRESPEC:
9506 case IPOPT_TS_PRESPEC_RFC791:
9507 off = IP_ADDR_LEN + IPOPT_TS_TIMELEN;
9508 break;
9509 default:
9510 code = (char *)&opt[IPOPT_POS_OV_FLG] -
9511 (char *)ipha;
9512 goto param_prob;
9513 }
9514 if (opt[IPOPT_OFFSET] - 1 + off > optlen &&
9515 (opt[IPOPT_POS_OV_FLG] & 0xF0) == 0xF0) {
9516 /*
9517 * No room and the overflow counter is 15
9518 * already.
9519 */
9520 goto param_prob;
9521 }
9522 break;
9523 }
9524 }
9525
9526 if ((opts.ipoptp_flags & IPOPTP_ERROR) == 0) {
9527 return (dst);
9528 }
9529
9530 ip1dbg(("ip_input_options: error processing IP options."));
9531 code = (char *)&opt[IPOPT_OFFSET] - (char *)ipha;
9532
9533 param_prob:
9534 /* make sure we clear any indication of a hardware checksum */
9535 DB_CKSUMFLAGS(mp) = 0;
9536 ip_drop_input("ICMP_PARAM_PROBLEM", mp, ira->ira_ill);
9537 icmp_param_problem(mp, (uint8_t)code, ira);
9538 *errorp = -1;
9539 return (dst);
9540
9541 bad_src_route:
9542 /* make sure we clear any indication of a hardware checksum */
9543 DB_CKSUMFLAGS(mp) = 0;
9544 ip_drop_input("ICMP_SOURCE_ROUTE_FAILED", mp, ira->ira_ill);
9545 icmp_unreachable(mp, ICMP_SOURCE_ROUTE_FAILED, ira);
9546 *errorp = -1;
9547 return (dst);
9548 }
9549
9550 /*
9551 * IP & ICMP info in >=14 msg's ...
9552 * - ip fixed part (mib2_ip_t)
9553 * - icmp fixed part (mib2_icmp_t)
9554 * - ipAddrEntryTable (ip 20) all IPv4 ipifs
9555 * - ipRouteEntryTable (ip 21) all IPv4 IREs
9556 * - ipNetToMediaEntryTable (ip 22) all IPv4 Neighbor Cache entries
9557 * - ipRouteAttributeTable (ip 102) labeled routes
9558 * - ip multicast membership (ip_member_t)
9559 * - ip multicast source filtering (ip_grpsrc_t)
9560 * - igmp fixed part (struct igmpstat)
9561 * - multicast routing stats (struct mrtstat)
9562 * - multicast routing vifs (array of struct vifctl)
9563 * - multicast routing routes (array of struct mfcctl)
9564 * - ip6 fixed part (mib2_ipv6IfStatsEntry_t)
9565 * One per ill plus one generic
9566 * - icmp6 fixed part (mib2_ipv6IfIcmpEntry_t)
9567 * One per ill plus one generic
9568 * - ipv6RouteEntry all IPv6 IREs
9569 * - ipv6RouteAttributeTable (ip6 102) labeled routes
9570 * - ipv6NetToMediaEntry all IPv6 Neighbor Cache entries
9571 * - ipv6AddrEntry all IPv6 ipifs
9572 * - ipv6 multicast membership (ipv6_member_t)
9573 * - ipv6 multicast source filtering (ipv6_grpsrc_t)
9574 *
9575 * NOTE: original mpctl is copied for msg's 2..N, since its ctl part is
9576 * already filled in by the caller.
9577 * If legacy_req is true then MIB structures needs to be truncated to their
9578 * legacy sizes before being returned.
9579 * Return value of 0 indicates that no messages were sent and caller
9580 * should free mpctl.
9581 */
9582 int
9583 ip_snmp_get(queue_t *q, mblk_t *mpctl, int level, boolean_t legacy_req)
9584 {
9585 ip_stack_t *ipst;
9586 sctp_stack_t *sctps;
9587
9588 if (q->q_next != NULL) {
9589 ipst = ILLQ_TO_IPST(q);
9590 } else {
9591 ipst = CONNQ_TO_IPST(q);
9592 }
9593 ASSERT(ipst != NULL);
9594 sctps = ipst->ips_netstack->netstack_sctp;
9595
9596 if (mpctl == NULL || mpctl->b_cont == NULL) {
9597 return (0);
9598 }
9599
9600 /*
9601 * For the purposes of the (broken) packet shell use
9602 * of the level we make sure MIB2_TCP/MIB2_UDP can be used
9603 * to make TCP and UDP appear first in the list of mib items.
9604 * TBD: We could expand this and use it in netstat so that
9605 * the kernel doesn't have to produce large tables (connections,
9606 * routes, etc) when netstat only wants the statistics or a particular
9607 * table.
9608 */
9609 if (!(level == MIB2_TCP || level == MIB2_UDP)) {
9610 if ((mpctl = icmp_snmp_get(q, mpctl)) == NULL) {
9611 return (1);
9612 }
9613 }
9614
9615 if (level != MIB2_TCP) {
9616 if ((mpctl = udp_snmp_get(q, mpctl, legacy_req)) == NULL) {
9617 return (1);
9618 }
9619 }
9620
9621 if (level != MIB2_UDP) {
9622 if ((mpctl = tcp_snmp_get(q, mpctl, legacy_req)) == NULL) {
9623 return (1);
9624 }
9625 }
9626
9627 if ((mpctl = ip_snmp_get_mib2_ip_traffic_stats(q, mpctl,
9628 ipst, legacy_req)) == NULL) {
9629 return (1);
9630 }
9631
9632 if ((mpctl = ip_snmp_get_mib2_ip6(q, mpctl, ipst,
9633 legacy_req)) == NULL) {
9634 return (1);
9635 }
9636
9637 if ((mpctl = ip_snmp_get_mib2_icmp(q, mpctl, ipst)) == NULL) {
9638 return (1);
9639 }
9640
9641 if ((mpctl = ip_snmp_get_mib2_icmp6(q, mpctl, ipst)) == NULL) {
9642 return (1);
9643 }
9644
9645 if ((mpctl = ip_snmp_get_mib2_igmp(q, mpctl, ipst)) == NULL) {
9646 return (1);
9647 }
9648
9649 if ((mpctl = ip_snmp_get_mib2_multi(q, mpctl, ipst)) == NULL) {
9650 return (1);
9651 }
9652
9653 if ((mpctl = ip_snmp_get_mib2_ip_addr(q, mpctl, ipst,
9654 legacy_req)) == NULL) {
9655 return (1);
9656 }
9657
9658 if ((mpctl = ip_snmp_get_mib2_ip6_addr(q, mpctl, ipst,
9659 legacy_req)) == NULL) {
9660 return (1);
9661 }
9662
9663 if ((mpctl = ip_snmp_get_mib2_ip_group_mem(q, mpctl, ipst)) == NULL) {
9664 return (1);
9665 }
9666
9667 if ((mpctl = ip_snmp_get_mib2_ip6_group_mem(q, mpctl, ipst)) == NULL) {
9668 return (1);
9669 }
9670
9671 if ((mpctl = ip_snmp_get_mib2_ip_group_src(q, mpctl, ipst)) == NULL) {
9672 return (1);
9673 }
9674
9675 if ((mpctl = ip_snmp_get_mib2_ip6_group_src(q, mpctl, ipst)) == NULL) {
9676 return (1);
9677 }
9678
9679 if ((mpctl = ip_snmp_get_mib2_virt_multi(q, mpctl, ipst)) == NULL) {
9680 return (1);
9681 }
9682
9683 if ((mpctl = ip_snmp_get_mib2_multi_rtable(q, mpctl, ipst)) == NULL) {
9684 return (1);
9685 }
9686
9687 mpctl = ip_snmp_get_mib2_ip_route_media(q, mpctl, level, ipst);
9688 if (mpctl == NULL)
9689 return (1);
9690
9691 mpctl = ip_snmp_get_mib2_ip6_route_media(q, mpctl, level, ipst);
9692 if (mpctl == NULL)
9693 return (1);
9694
9695 if ((mpctl = sctp_snmp_get_mib2(q, mpctl, sctps)) == NULL) {
9696 return (1);
9697 }
9698 if ((mpctl = ip_snmp_get_mib2_ip_dce(q, mpctl, ipst)) == NULL) {
9699 return (1);
9700 }
9701 freemsg(mpctl);
9702 return (1);
9703 }
9704
9705 /* Get global (legacy) IPv4 statistics */
9706 static mblk_t *
9707 ip_snmp_get_mib2_ip(queue_t *q, mblk_t *mpctl, mib2_ipIfStatsEntry_t *ipmib,
9708 ip_stack_t *ipst, boolean_t legacy_req)
9709 {
9710 mib2_ip_t old_ip_mib;
9711 struct opthdr *optp;
9712 mblk_t *mp2ctl;
9713 mib2_ipAddrEntry_t mae;
9714
9715 /*
9716 * make a copy of the original message
9717 */
9718 mp2ctl = copymsg(mpctl);
9719
9720 /* fixed length IP structure... */
9721 optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)];
9722 optp->level = MIB2_IP;
9723 optp->name = 0;
9724 SET_MIB(old_ip_mib.ipForwarding,
9725 (WE_ARE_FORWARDING(ipst) ? 1 : 2));
9726 SET_MIB(old_ip_mib.ipDefaultTTL,
9727 (uint32_t)ipst->ips_ip_def_ttl);
9728 SET_MIB(old_ip_mib.ipReasmTimeout,
9729 ipst->ips_ip_reassembly_timeout);
9730 SET_MIB(old_ip_mib.ipAddrEntrySize,
9731 (legacy_req) ? LEGACY_MIB_SIZE(&mae, mib2_ipAddrEntry_t) :
9732 sizeof (mib2_ipAddrEntry_t));
9733 SET_MIB(old_ip_mib.ipRouteEntrySize,
9734 sizeof (mib2_ipRouteEntry_t));
9735 SET_MIB(old_ip_mib.ipNetToMediaEntrySize,
9736 sizeof (mib2_ipNetToMediaEntry_t));
9737 SET_MIB(old_ip_mib.ipMemberEntrySize, sizeof (ip_member_t));
9738 SET_MIB(old_ip_mib.ipGroupSourceEntrySize, sizeof (ip_grpsrc_t));
9739 SET_MIB(old_ip_mib.ipRouteAttributeSize,
9740 sizeof (mib2_ipAttributeEntry_t));
9741 SET_MIB(old_ip_mib.transportMLPSize, sizeof (mib2_transportMLPEntry_t));
9742 SET_MIB(old_ip_mib.ipDestEntrySize, sizeof (dest_cache_entry_t));
9743
9744 /*
9745 * Grab the statistics from the new IP MIB
9746 */
9747 SET_MIB(old_ip_mib.ipInReceives,
9748 (uint32_t)ipmib->ipIfStatsHCInReceives);
9749 SET_MIB(old_ip_mib.ipInHdrErrors, ipmib->ipIfStatsInHdrErrors);
9750 SET_MIB(old_ip_mib.ipInAddrErrors, ipmib->ipIfStatsInAddrErrors);
9751 SET_MIB(old_ip_mib.ipForwDatagrams,
9752 (uint32_t)ipmib->ipIfStatsHCOutForwDatagrams);
9753 SET_MIB(old_ip_mib.ipInUnknownProtos,
9754 ipmib->ipIfStatsInUnknownProtos);
9755 SET_MIB(old_ip_mib.ipInDiscards, ipmib->ipIfStatsInDiscards);
9756 SET_MIB(old_ip_mib.ipInDelivers,
9757 (uint32_t)ipmib->ipIfStatsHCInDelivers);
9758 SET_MIB(old_ip_mib.ipOutRequests,
9759 (uint32_t)ipmib->ipIfStatsHCOutRequests);
9760 SET_MIB(old_ip_mib.ipOutDiscards, ipmib->ipIfStatsOutDiscards);
9761 SET_MIB(old_ip_mib.ipOutNoRoutes, ipmib->ipIfStatsOutNoRoutes);
9762 SET_MIB(old_ip_mib.ipReasmReqds, ipmib->ipIfStatsReasmReqds);
9763 SET_MIB(old_ip_mib.ipReasmOKs, ipmib->ipIfStatsReasmOKs);
9764 SET_MIB(old_ip_mib.ipReasmFails, ipmib->ipIfStatsReasmFails);
9765 SET_MIB(old_ip_mib.ipFragOKs, ipmib->ipIfStatsOutFragOKs);
9766 SET_MIB(old_ip_mib.ipFragFails, ipmib->ipIfStatsOutFragFails);
9767 SET_MIB(old_ip_mib.ipFragCreates, ipmib->ipIfStatsOutFragCreates);
9768
9769 /* ipRoutingDiscards is not being used */
9770 SET_MIB(old_ip_mib.ipRoutingDiscards, 0);
9771 SET_MIB(old_ip_mib.tcpInErrs, ipmib->tcpIfStatsInErrs);
9772 SET_MIB(old_ip_mib.udpNoPorts, ipmib->udpIfStatsNoPorts);
9773 SET_MIB(old_ip_mib.ipInCksumErrs, ipmib->ipIfStatsInCksumErrs);
9774 SET_MIB(old_ip_mib.ipReasmDuplicates,
9775 ipmib->ipIfStatsReasmDuplicates);
9776 SET_MIB(old_ip_mib.ipReasmPartDups, ipmib->ipIfStatsReasmPartDups);
9777 SET_MIB(old_ip_mib.ipForwProhibits, ipmib->ipIfStatsForwProhibits);
9778 SET_MIB(old_ip_mib.udpInCksumErrs, ipmib->udpIfStatsInCksumErrs);
9779 SET_MIB(old_ip_mib.udpInOverflows, ipmib->udpIfStatsInOverflows);
9780 SET_MIB(old_ip_mib.rawipInOverflows,
9781 ipmib->rawipIfStatsInOverflows);
9782
9783 SET_MIB(old_ip_mib.ipsecInSucceeded, ipmib->ipsecIfStatsInSucceeded);
9784 SET_MIB(old_ip_mib.ipsecInFailed, ipmib->ipsecIfStatsInFailed);
9785 SET_MIB(old_ip_mib.ipInIPv6, ipmib->ipIfStatsInWrongIPVersion);
9786 SET_MIB(old_ip_mib.ipOutIPv6, ipmib->ipIfStatsOutWrongIPVersion);
9787 SET_MIB(old_ip_mib.ipOutSwitchIPv6,
9788 ipmib->ipIfStatsOutSwitchIPVersion);
9789
9790 if (!snmp_append_data(mpctl->b_cont, (char *)&old_ip_mib,
9791 (int)sizeof (old_ip_mib))) {
9792 ip1dbg(("ip_snmp_get_mib2_ip: failed to allocate %u bytes\n",
9793 (uint_t)sizeof (old_ip_mib)));
9794 }
9795
9796 optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont);
9797 ip3dbg(("ip_snmp_get_mib2_ip: level %d, name %d, len %d\n",
9798 (int)optp->level, (int)optp->name, (int)optp->len));
9799 qreply(q, mpctl);
9800 return (mp2ctl);
9801 }
9802
9803 /* Per interface IPv4 statistics */
9804 static mblk_t *
9805 ip_snmp_get_mib2_ip_traffic_stats(queue_t *q, mblk_t *mpctl, ip_stack_t *ipst,
9806 boolean_t legacy_req)
9807 {
9808 struct opthdr *optp;
9809 mblk_t *mp2ctl;
9810 ill_t *ill;
9811 ill_walk_context_t ctx;
9812 mblk_t *mp_tail = NULL;
9813 mib2_ipIfStatsEntry_t global_ip_mib;
9814 mib2_ipAddrEntry_t mae;
9815
9816 /*
9817 * Make a copy of the original message
9818 */
9819 mp2ctl = copymsg(mpctl);
9820
9821 optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)];
9822 optp->level = MIB2_IP;
9823 optp->name = MIB2_IP_TRAFFIC_STATS;
9824 /* Include "unknown interface" ip_mib */
9825 ipst->ips_ip_mib.ipIfStatsIPVersion = MIB2_INETADDRESSTYPE_ipv4;
9826 ipst->ips_ip_mib.ipIfStatsIfIndex =
9827 MIB2_UNKNOWN_INTERFACE; /* Flag to netstat */
9828 SET_MIB(ipst->ips_ip_mib.ipIfStatsForwarding,
9829 (ipst->ips_ip_forwarding ? 1 : 2));
9830 SET_MIB(ipst->ips_ip_mib.ipIfStatsDefaultTTL,
9831 (uint32_t)ipst->ips_ip_def_ttl);
9832 SET_MIB(ipst->ips_ip_mib.ipIfStatsEntrySize,
9833 sizeof (mib2_ipIfStatsEntry_t));
9834 SET_MIB(ipst->ips_ip_mib.ipIfStatsAddrEntrySize,
9835 sizeof (mib2_ipAddrEntry_t));
9836 SET_MIB(ipst->ips_ip_mib.ipIfStatsRouteEntrySize,
9837 sizeof (mib2_ipRouteEntry_t));
9838 SET_MIB(ipst->ips_ip_mib.ipIfStatsNetToMediaEntrySize,
9839 sizeof (mib2_ipNetToMediaEntry_t));
9840 SET_MIB(ipst->ips_ip_mib.ipIfStatsMemberEntrySize,
9841 sizeof (ip_member_t));
9842 SET_MIB(ipst->ips_ip_mib.ipIfStatsGroupSourceEntrySize,
9843 sizeof (ip_grpsrc_t));
9844
9845 bcopy(&ipst->ips_ip_mib, &global_ip_mib, sizeof (global_ip_mib));
9846
9847 if (legacy_req) {
9848 SET_MIB(global_ip_mib.ipIfStatsAddrEntrySize,
9849 LEGACY_MIB_SIZE(&mae, mib2_ipAddrEntry_t));
9850 }
9851
9852 if (!snmp_append_data2(mpctl->b_cont, &mp_tail,
9853 (char *)&global_ip_mib, (int)sizeof (global_ip_mib))) {
9854 ip1dbg(("ip_snmp_get_mib2_ip_traffic_stats: "
9855 "failed to allocate %u bytes\n",
9856 (uint_t)sizeof (global_ip_mib)));
9857 }
9858
9859 rw_enter(&ipst->ips_ill_g_lock, RW_READER);
9860 ill = ILL_START_WALK_V4(&ctx, ipst);
9861 for (; ill != NULL; ill = ill_next(&ctx, ill)) {
9862 ill->ill_ip_mib->ipIfStatsIfIndex =
9863 ill->ill_phyint->phyint_ifindex;
9864 SET_MIB(ill->ill_ip_mib->ipIfStatsForwarding,
9865 (ipst->ips_ip_forwarding ? 1 : 2));
9866 SET_MIB(ill->ill_ip_mib->ipIfStatsDefaultTTL,
9867 (uint32_t)ipst->ips_ip_def_ttl);
9868
9869 ip_mib2_add_ip_stats(&global_ip_mib, ill->ill_ip_mib);
9870 if (!snmp_append_data2(mpctl->b_cont, &mp_tail,
9871 (char *)ill->ill_ip_mib,
9872 (int)sizeof (*ill->ill_ip_mib))) {
9873 ip1dbg(("ip_snmp_get_mib2_ip_traffic_stats: "
9874 "failed to allocate %u bytes\n",
9875 (uint_t)sizeof (*ill->ill_ip_mib)));
9876 }
9877 }
9878 rw_exit(&ipst->ips_ill_g_lock);
9879
9880 optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont);
9881 ip3dbg(("ip_snmp_get_mib2_ip_traffic_stats: "
9882 "level %d, name %d, len %d\n",
9883 (int)optp->level, (int)optp->name, (int)optp->len));
9884 qreply(q, mpctl);
9885
9886 if (mp2ctl == NULL)
9887 return (NULL);
9888
9889 return (ip_snmp_get_mib2_ip(q, mp2ctl, &global_ip_mib, ipst,
9890 legacy_req));
9891 }
9892
9893 /* Global IPv4 ICMP statistics */
9894 static mblk_t *
9895 ip_snmp_get_mib2_icmp(queue_t *q, mblk_t *mpctl, ip_stack_t *ipst)
9896 {
9897 struct opthdr *optp;
9898 mblk_t *mp2ctl;
9899
9900 /*
9901 * Make a copy of the original message
9902 */
9903 mp2ctl = copymsg(mpctl);
9904
9905 optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)];
9906 optp->level = MIB2_ICMP;
9907 optp->name = 0;
9908 if (!snmp_append_data(mpctl->b_cont, (char *)&ipst->ips_icmp_mib,
9909 (int)sizeof (ipst->ips_icmp_mib))) {
9910 ip1dbg(("ip_snmp_get_mib2_icmp: failed to allocate %u bytes\n",
9911 (uint_t)sizeof (ipst->ips_icmp_mib)));
9912 }
9913 optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont);
9914 ip3dbg(("ip_snmp_get_mib2_icmp: level %d, name %d, len %d\n",
9915 (int)optp->level, (int)optp->name, (int)optp->len));
9916 qreply(q, mpctl);
9917 return (mp2ctl);
9918 }
9919
9920 /* Global IPv4 IGMP statistics */
9921 static mblk_t *
9922 ip_snmp_get_mib2_igmp(queue_t *q, mblk_t *mpctl, ip_stack_t *ipst)
9923 {
9924 struct opthdr *optp;
9925 mblk_t *mp2ctl;
9926
9927 /*
9928 * make a copy of the original message
9929 */
9930 mp2ctl = copymsg(mpctl);
9931
9932 optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)];
9933 optp->level = EXPER_IGMP;
9934 optp->name = 0;
9935 if (!snmp_append_data(mpctl->b_cont, (char *)&ipst->ips_igmpstat,
9936 (int)sizeof (ipst->ips_igmpstat))) {
9937 ip1dbg(("ip_snmp_get_mib2_igmp: failed to allocate %u bytes\n",
9938 (uint_t)sizeof (ipst->ips_igmpstat)));
9939 }
9940 optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont);
9941 ip3dbg(("ip_snmp_get_mib2_igmp: level %d, name %d, len %d\n",
9942 (int)optp->level, (int)optp->name, (int)optp->len));
9943 qreply(q, mpctl);
9944 return (mp2ctl);
9945 }
9946
9947 /* Global IPv4 Multicast Routing statistics */
9948 static mblk_t *
9949 ip_snmp_get_mib2_multi(queue_t *q, mblk_t *mpctl, ip_stack_t *ipst)
9950 {
9951 struct opthdr *optp;
9952 mblk_t *mp2ctl;
9953
9954 /*
9955 * make a copy of the original message
9956 */
9957 mp2ctl = copymsg(mpctl);
9958
9959 optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)];
9960 optp->level = EXPER_DVMRP;
9961 optp->name = 0;
9962 if (!ip_mroute_stats(mpctl->b_cont, ipst)) {
9963 ip0dbg(("ip_mroute_stats: failed\n"));
9964 }
9965 optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont);
9966 ip3dbg(("ip_snmp_get_mib2_multi: level %d, name %d, len %d\n",
9967 (int)optp->level, (int)optp->name, (int)optp->len));
9968 qreply(q, mpctl);
9969 return (mp2ctl);
9970 }
9971
9972 /* IPv4 address information */
9973 static mblk_t *
9974 ip_snmp_get_mib2_ip_addr(queue_t *q, mblk_t *mpctl, ip_stack_t *ipst,
9975 boolean_t legacy_req)
9976 {
9977 struct opthdr *optp;
9978 mblk_t *mp2ctl;
9979 mblk_t *mp_tail = NULL;
9980 ill_t *ill;
9981 ipif_t *ipif;
9982 uint_t bitval;
9983 mib2_ipAddrEntry_t mae;
9984 size_t mae_size;
9985 zoneid_t zoneid;
9986 ill_walk_context_t ctx;
9987
9988 /*
9989 * make a copy of the original message
9990 */
9991 mp2ctl = copymsg(mpctl);
9992
9993 mae_size = (legacy_req) ? LEGACY_MIB_SIZE(&mae, mib2_ipAddrEntry_t) :
9994 sizeof (mib2_ipAddrEntry_t);
9995
9996 /* ipAddrEntryTable */
9997
9998 optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)];
9999 optp->level = MIB2_IP;
10000 optp->name = MIB2_IP_ADDR;
10001 zoneid = Q_TO_CONN(q)->conn_zoneid;
10002
10003 rw_enter(&ipst->ips_ill_g_lock, RW_READER);
10004 ill = ILL_START_WALK_V4(&ctx, ipst);
10005 for (; ill != NULL; ill = ill_next(&ctx, ill)) {
10006 for (ipif = ill->ill_ipif; ipif != NULL;
10007 ipif = ipif->ipif_next) {
10008 if (ipif->ipif_zoneid != zoneid &&
10009 ipif->ipif_zoneid != ALL_ZONES)
10010 continue;
10011 /* Sum of count from dead IRE_LO* and our current */
10012 mae.ipAdEntInfo.ae_ibcnt = ipif->ipif_ib_pkt_count;
10013 if (ipif->ipif_ire_local != NULL) {
10014 mae.ipAdEntInfo.ae_ibcnt +=
10015 ipif->ipif_ire_local->ire_ib_pkt_count;
10016 }
10017 mae.ipAdEntInfo.ae_obcnt = 0;
10018 mae.ipAdEntInfo.ae_focnt = 0;
10019
10020 ipif_get_name(ipif, mae.ipAdEntIfIndex.o_bytes,
10021 OCTET_LENGTH);
10022 mae.ipAdEntIfIndex.o_length =
10023 mi_strlen(mae.ipAdEntIfIndex.o_bytes);
10024 mae.ipAdEntAddr = ipif->ipif_lcl_addr;
10025 mae.ipAdEntNetMask = ipif->ipif_net_mask;
10026 mae.ipAdEntInfo.ae_subnet = ipif->ipif_subnet;
10027 mae.ipAdEntInfo.ae_subnet_len =
10028 ip_mask_to_plen(ipif->ipif_net_mask);
10029 mae.ipAdEntInfo.ae_src_addr = ipif->ipif_lcl_addr;
10030 for (bitval = 1;
10031 bitval &&
10032 !(bitval & ipif->ipif_brd_addr);
10033 bitval <<= 1)
10034 noop;
10035 mae.ipAdEntBcastAddr = bitval;
10036 mae.ipAdEntReasmMaxSize = IP_MAXPACKET;
10037 mae.ipAdEntInfo.ae_mtu = ipif->ipif_ill->ill_mtu;
10038 mae.ipAdEntInfo.ae_metric = ipif->ipif_ill->ill_metric;
10039 mae.ipAdEntInfo.ae_broadcast_addr =
10040 ipif->ipif_brd_addr;
10041 mae.ipAdEntInfo.ae_pp_dst_addr =
10042 ipif->ipif_pp_dst_addr;
10043 mae.ipAdEntInfo.ae_flags = ipif->ipif_flags |
10044 ill->ill_flags | ill->ill_phyint->phyint_flags;
10045 mae.ipAdEntRetransmitTime =
10046 ill->ill_reachable_retrans_time;
10047
10048 if (!snmp_append_data2(mpctl->b_cont, &mp_tail,
10049 (char *)&mae, (int)mae_size)) {
10050 ip1dbg(("ip_snmp_get_mib2_ip_addr: failed to "
10051 "allocate %u bytes\n", (uint_t)mae_size));
10052 }
10053 }
10054 }
10055 rw_exit(&ipst->ips_ill_g_lock);
10056
10057 optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont);
10058 ip3dbg(("ip_snmp_get_mib2_ip_addr: level %d, name %d, len %d\n",
10059 (int)optp->level, (int)optp->name, (int)optp->len));
10060 qreply(q, mpctl);
10061 return (mp2ctl);
10062 }
10063
10064 /* IPv6 address information */
10065 static mblk_t *
10066 ip_snmp_get_mib2_ip6_addr(queue_t *q, mblk_t *mpctl, ip_stack_t *ipst,
10067 boolean_t legacy_req)
10068 {
10069 struct opthdr *optp;
10070 mblk_t *mp2ctl;
10071 mblk_t *mp_tail = NULL;
10072 ill_t *ill;
10073 ipif_t *ipif;
10074 mib2_ipv6AddrEntry_t mae6;
10075 size_t mae6_size;
10076 zoneid_t zoneid;
10077 ill_walk_context_t ctx;
10078
10079 /*
10080 * make a copy of the original message
10081 */
10082 mp2ctl = copymsg(mpctl);
10083
10084 mae6_size = (legacy_req) ?
10085 LEGACY_MIB_SIZE(&mae6, mib2_ipv6AddrEntry_t) :
10086 sizeof (mib2_ipv6AddrEntry_t);
10087
10088 /* ipv6AddrEntryTable */
10089
10090 optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)];
10091 optp->level = MIB2_IP6;
10092 optp->name = MIB2_IP6_ADDR;
10093 zoneid = Q_TO_CONN(q)->conn_zoneid;
10094
10095 rw_enter(&ipst->ips_ill_g_lock, RW_READER);
10096 ill = ILL_START_WALK_V6(&ctx, ipst);
10097 for (; ill != NULL; ill = ill_next(&ctx, ill)) {
10098 for (ipif = ill->ill_ipif; ipif != NULL;
10099 ipif = ipif->ipif_next) {
10100 if (ipif->ipif_zoneid != zoneid &&
10101 ipif->ipif_zoneid != ALL_ZONES)
10102 continue;
10103 /* Sum of count from dead IRE_LO* and our current */
10104 mae6.ipv6AddrInfo.ae_ibcnt = ipif->ipif_ib_pkt_count;
10105 if (ipif->ipif_ire_local != NULL) {
10106 mae6.ipv6AddrInfo.ae_ibcnt +=
10107 ipif->ipif_ire_local->ire_ib_pkt_count;
10108 }
10109 mae6.ipv6AddrInfo.ae_obcnt = 0;
10110 mae6.ipv6AddrInfo.ae_focnt = 0;
10111
10112 ipif_get_name(ipif, mae6.ipv6AddrIfIndex.o_bytes,
10113 OCTET_LENGTH);
10114 mae6.ipv6AddrIfIndex.o_length =
10115 mi_strlen(mae6.ipv6AddrIfIndex.o_bytes);
10116 mae6.ipv6AddrAddress = ipif->ipif_v6lcl_addr;
10117 mae6.ipv6AddrPfxLength =
10118 ip_mask_to_plen_v6(&ipif->ipif_v6net_mask);
10119 mae6.ipv6AddrInfo.ae_subnet = ipif->ipif_v6subnet;
10120 mae6.ipv6AddrInfo.ae_subnet_len =
10121 mae6.ipv6AddrPfxLength;
10122 mae6.ipv6AddrInfo.ae_src_addr = ipif->ipif_v6lcl_addr;
10123
10124 /* Type: stateless(1), stateful(2), unknown(3) */
10125 if (ipif->ipif_flags & IPIF_ADDRCONF)
10126 mae6.ipv6AddrType = 1;
10127 else
10128 mae6.ipv6AddrType = 2;
10129 /* Anycast: true(1), false(2) */
10130 if (ipif->ipif_flags & IPIF_ANYCAST)
10131 mae6.ipv6AddrAnycastFlag = 1;
10132 else
10133 mae6.ipv6AddrAnycastFlag = 2;
10134
10135 /*
10136 * Address status: preferred(1), deprecated(2),
10137 * invalid(3), inaccessible(4), unknown(5)
10138 */
10139 if (ipif->ipif_flags & IPIF_NOLOCAL)
10140 mae6.ipv6AddrStatus = 3;
10141 else if (ipif->ipif_flags & IPIF_DEPRECATED)
10142 mae6.ipv6AddrStatus = 2;
10143 else
10144 mae6.ipv6AddrStatus = 1;
10145 mae6.ipv6AddrInfo.ae_mtu = ipif->ipif_ill->ill_mtu;
10146 mae6.ipv6AddrInfo.ae_metric =
10147 ipif->ipif_ill->ill_metric;
10148 mae6.ipv6AddrInfo.ae_pp_dst_addr =
10149 ipif->ipif_v6pp_dst_addr;
10150 mae6.ipv6AddrInfo.ae_flags = ipif->ipif_flags |
10151 ill->ill_flags | ill->ill_phyint->phyint_flags;
10152 mae6.ipv6AddrReasmMaxSize = IP_MAXPACKET;
10153 mae6.ipv6AddrIdentifier = ill->ill_token;
10154 mae6.ipv6AddrIdentifierLen = ill->ill_token_length;
10155 mae6.ipv6AddrReachableTime = ill->ill_reachable_time;
10156 mae6.ipv6AddrRetransmitTime =
10157 ill->ill_reachable_retrans_time;
10158 if (!snmp_append_data2(mpctl->b_cont, &mp_tail,
10159 (char *)&mae6, (int)mae6_size)) {
10160 ip1dbg(("ip_snmp_get_mib2_ip6_addr: failed to "
10161 "allocate %u bytes\n",
10162 (uint_t)mae6_size));
10163 }
10164 }
10165 }
10166 rw_exit(&ipst->ips_ill_g_lock);
10167
10168 optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont);
10169 ip3dbg(("ip_snmp_get_mib2_ip6_addr: level %d, name %d, len %d\n",
10170 (int)optp->level, (int)optp->name, (int)optp->len));
10171 qreply(q, mpctl);
10172 return (mp2ctl);
10173 }
10174
10175 /* IPv4 multicast group membership. */
10176 static mblk_t *
10177 ip_snmp_get_mib2_ip_group_mem(queue_t *q, mblk_t *mpctl, ip_stack_t *ipst)
10178 {
10179 struct opthdr *optp;
10180 mblk_t *mp2ctl;
10181 ill_t *ill;
10182 ipif_t *ipif;
10183 ilm_t *ilm;
10184 ip_member_t ipm;
10185 mblk_t *mp_tail = NULL;
10186 ill_walk_context_t ctx;
10187 zoneid_t zoneid;
10188
10189 /*
10190 * make a copy of the original message
10191 */
10192 mp2ctl = copymsg(mpctl);
10193 zoneid = Q_TO_CONN(q)->conn_zoneid;
10194
10195 /* ipGroupMember table */
10196 optp = (struct opthdr *)&mpctl->b_rptr[
10197 sizeof (struct T_optmgmt_ack)];
10198 optp->level = MIB2_IP;
10199 optp->name = EXPER_IP_GROUP_MEMBERSHIP;
10200
10201 rw_enter(&ipst->ips_ill_g_lock, RW_READER);
10202 ill = ILL_START_WALK_V4(&ctx, ipst);
10203 for (; ill != NULL; ill = ill_next(&ctx, ill)) {
10204 /* Make sure the ill isn't going away. */
10205 if (!ill_check_and_refhold(ill))
10206 continue;
10207 rw_exit(&ipst->ips_ill_g_lock);
10208 rw_enter(&ill->ill_mcast_lock, RW_READER);
10209 for (ilm = ill->ill_ilm; ilm; ilm = ilm->ilm_next) {
10210 if (ilm->ilm_zoneid != zoneid &&
10211 ilm->ilm_zoneid != ALL_ZONES)
10212 continue;
10213
10214 /* Is there an ipif for ilm_ifaddr? */
10215 for (ipif = ill->ill_ipif; ipif != NULL;
10216 ipif = ipif->ipif_next) {
10217 if (!IPIF_IS_CONDEMNED(ipif) &&
10218 ipif->ipif_lcl_addr == ilm->ilm_ifaddr &&
10219 ilm->ilm_ifaddr != INADDR_ANY)
10220 break;
10221 }
10222 if (ipif != NULL) {
10223 ipif_get_name(ipif,
10224 ipm.ipGroupMemberIfIndex.o_bytes,
10225 OCTET_LENGTH);
10226 } else {
10227 ill_get_name(ill,
10228 ipm.ipGroupMemberIfIndex.o_bytes,
10229 OCTET_LENGTH);
10230 }
10231 ipm.ipGroupMemberIfIndex.o_length =
10232 mi_strlen(ipm.ipGroupMemberIfIndex.o_bytes);
10233
10234 ipm.ipGroupMemberAddress = ilm->ilm_addr;
10235 ipm.ipGroupMemberRefCnt = ilm->ilm_refcnt;
10236 ipm.ipGroupMemberFilterMode = ilm->ilm_fmode;
10237 if (!snmp_append_data2(mpctl->b_cont, &mp_tail,
10238 (char *)&ipm, (int)sizeof (ipm))) {
10239 ip1dbg(("ip_snmp_get_mib2_ip_group: "
10240 "failed to allocate %u bytes\n",
10241 (uint_t)sizeof (ipm)));
10242 }
10243 }
10244 rw_exit(&ill->ill_mcast_lock);
10245 ill_refrele(ill);
10246 rw_enter(&ipst->ips_ill_g_lock, RW_READER);
10247 }
10248 rw_exit(&ipst->ips_ill_g_lock);
10249 optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont);
10250 ip3dbg(("ip_snmp_get: level %d, name %d, len %d\n",
10251 (int)optp->level, (int)optp->name, (int)optp->len));
10252 qreply(q, mpctl);
10253 return (mp2ctl);
10254 }
10255
10256 /* IPv6 multicast group membership. */
10257 static mblk_t *
10258 ip_snmp_get_mib2_ip6_group_mem(queue_t *q, mblk_t *mpctl, ip_stack_t *ipst)
10259 {
10260 struct opthdr *optp;
10261 mblk_t *mp2ctl;
10262 ill_t *ill;
10263 ilm_t *ilm;
10264 ipv6_member_t ipm6;
10265 mblk_t *mp_tail = NULL;
10266 ill_walk_context_t ctx;
10267 zoneid_t zoneid;
10268
10269 /*
10270 * make a copy of the original message
10271 */
10272 mp2ctl = copymsg(mpctl);
10273 zoneid = Q_TO_CONN(q)->conn_zoneid;
10274
10275 /* ip6GroupMember table */
10276 optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)];
10277 optp->level = MIB2_IP6;
10278 optp->name = EXPER_IP6_GROUP_MEMBERSHIP;
10279
10280 rw_enter(&ipst->ips_ill_g_lock, RW_READER);
10281 ill = ILL_START_WALK_V6(&ctx, ipst);
10282 for (; ill != NULL; ill = ill_next(&ctx, ill)) {
10283 /* Make sure the ill isn't going away. */
10284 if (!ill_check_and_refhold(ill))
10285 continue;
10286 rw_exit(&ipst->ips_ill_g_lock);
10287 /*
10288 * Normally we don't have any members on under IPMP interfaces.
10289 * We report them as a debugging aid.
10290 */
10291 rw_enter(&ill->ill_mcast_lock, RW_READER);
10292 ipm6.ipv6GroupMemberIfIndex = ill->ill_phyint->phyint_ifindex;
10293 for (ilm = ill->ill_ilm; ilm; ilm = ilm->ilm_next) {
10294 if (ilm->ilm_zoneid != zoneid &&
10295 ilm->ilm_zoneid != ALL_ZONES)
10296 continue; /* not this zone */
10297 ipm6.ipv6GroupMemberAddress = ilm->ilm_v6addr;
10298 ipm6.ipv6GroupMemberRefCnt = ilm->ilm_refcnt;
10299 ipm6.ipv6GroupMemberFilterMode = ilm->ilm_fmode;
10300 if (!snmp_append_data2(mpctl->b_cont,
10301 &mp_tail,
10302 (char *)&ipm6, (int)sizeof (ipm6))) {
10303 ip1dbg(("ip_snmp_get_mib2_ip6_group: "
10304 "failed to allocate %u bytes\n",
10305 (uint_t)sizeof (ipm6)));
10306 }
10307 }
10308 rw_exit(&ill->ill_mcast_lock);
10309 ill_refrele(ill);
10310 rw_enter(&ipst->ips_ill_g_lock, RW_READER);
10311 }
10312 rw_exit(&ipst->ips_ill_g_lock);
10313
10314 optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont);
10315 ip3dbg(("ip_snmp_get: level %d, name %d, len %d\n",
10316 (int)optp->level, (int)optp->name, (int)optp->len));
10317 qreply(q, mpctl);
10318 return (mp2ctl);
10319 }
10320
10321 /* IP multicast filtered sources */
10322 static mblk_t *
10323 ip_snmp_get_mib2_ip_group_src(queue_t *q, mblk_t *mpctl, ip_stack_t *ipst)
10324 {
10325 struct opthdr *optp;
10326 mblk_t *mp2ctl;
10327 ill_t *ill;
10328 ipif_t *ipif;
10329 ilm_t *ilm;
10330 ip_grpsrc_t ips;
10331 mblk_t *mp_tail = NULL;
10332 ill_walk_context_t ctx;
10333 zoneid_t zoneid;
10334 int i;
10335 slist_t *sl;
10336
10337 /*
10338 * make a copy of the original message
10339 */
10340 mp2ctl = copymsg(mpctl);
10341 zoneid = Q_TO_CONN(q)->conn_zoneid;
10342
10343 /* ipGroupSource table */
10344 optp = (struct opthdr *)&mpctl->b_rptr[
10345 sizeof (struct T_optmgmt_ack)];
10346 optp->level = MIB2_IP;
10347 optp->name = EXPER_IP_GROUP_SOURCES;
10348
10349 rw_enter(&ipst->ips_ill_g_lock, RW_READER);
10350 ill = ILL_START_WALK_V4(&ctx, ipst);
10351 for (; ill != NULL; ill = ill_next(&ctx, ill)) {
10352 /* Make sure the ill isn't going away. */
10353 if (!ill_check_and_refhold(ill))
10354 continue;
10355 rw_exit(&ipst->ips_ill_g_lock);
10356 rw_enter(&ill->ill_mcast_lock, RW_READER);
10357 for (ilm = ill->ill_ilm; ilm; ilm = ilm->ilm_next) {
10358 sl = ilm->ilm_filter;
10359 if (ilm->ilm_zoneid != zoneid &&
10360 ilm->ilm_zoneid != ALL_ZONES)
10361 continue;
10362 if (SLIST_IS_EMPTY(sl))
10363 continue;
10364
10365 /* Is there an ipif for ilm_ifaddr? */
10366 for (ipif = ill->ill_ipif; ipif != NULL;
10367 ipif = ipif->ipif_next) {
10368 if (!IPIF_IS_CONDEMNED(ipif) &&
10369 ipif->ipif_lcl_addr == ilm->ilm_ifaddr &&
10370 ilm->ilm_ifaddr != INADDR_ANY)
10371 break;
10372 }
10373 if (ipif != NULL) {
10374 ipif_get_name(ipif,
10375 ips.ipGroupSourceIfIndex.o_bytes,
10376 OCTET_LENGTH);
10377 } else {
10378 ill_get_name(ill,
10379 ips.ipGroupSourceIfIndex.o_bytes,
10380 OCTET_LENGTH);
10381 }
10382 ips.ipGroupSourceIfIndex.o_length =
10383 mi_strlen(ips.ipGroupSourceIfIndex.o_bytes);
10384
10385 ips.ipGroupSourceGroup = ilm->ilm_addr;
10386 for (i = 0; i < sl->sl_numsrc; i++) {
10387 if (!IN6_IS_ADDR_V4MAPPED(&sl->sl_addr[i]))
10388 continue;
10389 IN6_V4MAPPED_TO_IPADDR(&sl->sl_addr[i],
10390 ips.ipGroupSourceAddress);
10391 if (snmp_append_data2(mpctl->b_cont, &mp_tail,
10392 (char *)&ips, (int)sizeof (ips)) == 0) {
10393 ip1dbg(("ip_snmp_get_mib2_ip_group_src:"
10394 " failed to allocate %u bytes\n",
10395 (uint_t)sizeof (ips)));
10396 }
10397 }
10398 }
10399 rw_exit(&ill->ill_mcast_lock);
10400 ill_refrele(ill);
10401 rw_enter(&ipst->ips_ill_g_lock, RW_READER);
10402 }
10403 rw_exit(&ipst->ips_ill_g_lock);
10404 optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont);
10405 ip3dbg(("ip_snmp_get: level %d, name %d, len %d\n",
10406 (int)optp->level, (int)optp->name, (int)optp->len));
10407 qreply(q, mpctl);
10408 return (mp2ctl);
10409 }
10410
10411 /* IPv6 multicast filtered sources. */
10412 static mblk_t *
10413 ip_snmp_get_mib2_ip6_group_src(queue_t *q, mblk_t *mpctl, ip_stack_t *ipst)
10414 {
10415 struct opthdr *optp;
10416 mblk_t *mp2ctl;
10417 ill_t *ill;
10418 ilm_t *ilm;
10419 ipv6_grpsrc_t ips6;
10420 mblk_t *mp_tail = NULL;
10421 ill_walk_context_t ctx;
10422 zoneid_t zoneid;
10423 int i;
10424 slist_t *sl;
10425
10426 /*
10427 * make a copy of the original message
10428 */
10429 mp2ctl = copymsg(mpctl);
10430 zoneid = Q_TO_CONN(q)->conn_zoneid;
10431
10432 /* ip6GroupMember table */
10433 optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)];
10434 optp->level = MIB2_IP6;
10435 optp->name = EXPER_IP6_GROUP_SOURCES;
10436
10437 rw_enter(&ipst->ips_ill_g_lock, RW_READER);
10438 ill = ILL_START_WALK_V6(&ctx, ipst);
10439 for (; ill != NULL; ill = ill_next(&ctx, ill)) {
10440 /* Make sure the ill isn't going away. */
10441 if (!ill_check_and_refhold(ill))
10442 continue;
10443 rw_exit(&ipst->ips_ill_g_lock);
10444 /*
10445 * Normally we don't have any members on under IPMP interfaces.
10446 * We report them as a debugging aid.
10447 */
10448 rw_enter(&ill->ill_mcast_lock, RW_READER);
10449 ips6.ipv6GroupSourceIfIndex = ill->ill_phyint->phyint_ifindex;
10450 for (ilm = ill->ill_ilm; ilm; ilm = ilm->ilm_next) {
10451 sl = ilm->ilm_filter;
10452 if (ilm->ilm_zoneid != zoneid &&
10453 ilm->ilm_zoneid != ALL_ZONES)
10454 continue;
10455 if (SLIST_IS_EMPTY(sl))
10456 continue;
10457 ips6.ipv6GroupSourceGroup = ilm->ilm_v6addr;
10458 for (i = 0; i < sl->sl_numsrc; i++) {
10459 ips6.ipv6GroupSourceAddress = sl->sl_addr[i];
10460 if (!snmp_append_data2(mpctl->b_cont, &mp_tail,
10461 (char *)&ips6, (int)sizeof (ips6))) {
10462 ip1dbg(("ip_snmp_get_mib2_ip6_"
10463 "group_src: failed to allocate "
10464 "%u bytes\n",
10465 (uint_t)sizeof (ips6)));
10466 }
10467 }
10468 }
10469 rw_exit(&ill->ill_mcast_lock);
10470 ill_refrele(ill);
10471 rw_enter(&ipst->ips_ill_g_lock, RW_READER);
10472 }
10473 rw_exit(&ipst->ips_ill_g_lock);
10474
10475 optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont);
10476 ip3dbg(("ip_snmp_get: level %d, name %d, len %d\n",
10477 (int)optp->level, (int)optp->name, (int)optp->len));
10478 qreply(q, mpctl);
10479 return (mp2ctl);
10480 }
10481
10482 /* Multicast routing virtual interface table. */
10483 static mblk_t *
10484 ip_snmp_get_mib2_virt_multi(queue_t *q, mblk_t *mpctl, ip_stack_t *ipst)
10485 {
10486 struct opthdr *optp;
10487 mblk_t *mp2ctl;
10488
10489 /*
10490 * make a copy of the original message
10491 */
10492 mp2ctl = copymsg(mpctl);
10493
10494 optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)];
10495 optp->level = EXPER_DVMRP;
10496 optp->name = EXPER_DVMRP_VIF;
10497 if (!ip_mroute_vif(mpctl->b_cont, ipst)) {
10498 ip0dbg(("ip_mroute_vif: failed\n"));
10499 }
10500 optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont);
10501 ip3dbg(("ip_snmp_get_mib2_virt_multi: level %d, name %d, len %d\n",
10502 (int)optp->level, (int)optp->name, (int)optp->len));
10503 qreply(q, mpctl);
10504 return (mp2ctl);
10505 }
10506
10507 /* Multicast routing table. */
10508 static mblk_t *
10509 ip_snmp_get_mib2_multi_rtable(queue_t *q, mblk_t *mpctl, ip_stack_t *ipst)
10510 {
10511 struct opthdr *optp;
10512 mblk_t *mp2ctl;
10513
10514 /*
10515 * make a copy of the original message
10516 */
10517 mp2ctl = copymsg(mpctl);
10518
10519 optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)];
10520 optp->level = EXPER_DVMRP;
10521 optp->name = EXPER_DVMRP_MRT;
10522 if (!ip_mroute_mrt(mpctl->b_cont, ipst)) {
10523 ip0dbg(("ip_mroute_mrt: failed\n"));
10524 }
10525 optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont);
10526 ip3dbg(("ip_snmp_get_mib2_multi_rtable: level %d, name %d, len %d\n",
10527 (int)optp->level, (int)optp->name, (int)optp->len));
10528 qreply(q, mpctl);
10529 return (mp2ctl);
10530 }
10531
10532 /*
10533 * Return ipRouteEntryTable, ipNetToMediaEntryTable, and ipRouteAttributeTable
10534 * in one IRE walk.
10535 */
10536 static mblk_t *
10537 ip_snmp_get_mib2_ip_route_media(queue_t *q, mblk_t *mpctl, int level,
10538 ip_stack_t *ipst)
10539 {
10540 struct opthdr *optp;
10541 mblk_t *mp2ctl; /* Returned */
10542 mblk_t *mp3ctl; /* nettomedia */
10543 mblk_t *mp4ctl; /* routeattrs */
10544 iproutedata_t ird;
10545 zoneid_t zoneid;
10546
10547 /*
10548 * make copies of the original message
10549 * - mp2ctl is returned unchanged to the caller for his use
10550 * - mpctl is sent upstream as ipRouteEntryTable
10551 * - mp3ctl is sent upstream as ipNetToMediaEntryTable
10552 * - mp4ctl is sent upstream as ipRouteAttributeTable
10553 */
10554 mp2ctl = copymsg(mpctl);
10555 mp3ctl = copymsg(mpctl);
10556 mp4ctl = copymsg(mpctl);
10557 if (mp3ctl == NULL || mp4ctl == NULL) {
10558 freemsg(mp4ctl);
10559 freemsg(mp3ctl);
10560 freemsg(mp2ctl);
10561 freemsg(mpctl);
10562 return (NULL);
10563 }
10564
10565 bzero(&ird, sizeof (ird));
10566
10567 ird.ird_route.lp_head = mpctl->b_cont;
10568 ird.ird_netmedia.lp_head = mp3ctl->b_cont;
10569 ird.ird_attrs.lp_head = mp4ctl->b_cont;
10570 /*
10571 * If the level has been set the special EXPER_IP_AND_ALL_IRES value,
10572 * then also include ire_testhidden IREs and IRE_IF_CLONE. This is
10573 * intended a temporary solution until a proper MIB API is provided
10574 * that provides complete filtering/caller-opt-in.
10575 */
10576 if (level == EXPER_IP_AND_ALL_IRES)
10577 ird.ird_flags |= IRD_REPORT_ALL;
10578
10579 zoneid = Q_TO_CONN(q)->conn_zoneid;
10580 ire_walk_v4(ip_snmp_get2_v4, &ird, zoneid, ipst);
10581
10582 /* ipRouteEntryTable in mpctl */
10583 optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)];
10584 optp->level = MIB2_IP;
10585 optp->name = MIB2_IP_ROUTE;
10586 optp->len = msgdsize(ird.ird_route.lp_head);
10587 ip3dbg(("ip_snmp_get_mib2_ip_route_media: level %d, name %d, len %d\n",
10588 (int)optp->level, (int)optp->name, (int)optp->len));
10589 qreply(q, mpctl);
10590
10591 /* ipNetToMediaEntryTable in mp3ctl */
10592 ncec_walk(NULL, ip_snmp_get2_v4_media, &ird, ipst);
10593
10594 optp = (struct opthdr *)&mp3ctl->b_rptr[sizeof (struct T_optmgmt_ack)];
10595 optp->level = MIB2_IP;
10596 optp->name = MIB2_IP_MEDIA;
10597 optp->len = msgdsize(ird.ird_netmedia.lp_head);
10598 ip3dbg(("ip_snmp_get_mib2_ip_route_media: level %d, name %d, len %d\n",
10599 (int)optp->level, (int)optp->name, (int)optp->len));
10600 qreply(q, mp3ctl);
10601
10602 /* ipRouteAttributeTable in mp4ctl */
10603 optp = (struct opthdr *)&mp4ctl->b_rptr[sizeof (struct T_optmgmt_ack)];
10604 optp->level = MIB2_IP;
10605 optp->name = EXPER_IP_RTATTR;
10606 optp->len = msgdsize(ird.ird_attrs.lp_head);
10607 ip3dbg(("ip_snmp_get_mib2_ip_route_media: level %d, name %d, len %d\n",
10608 (int)optp->level, (int)optp->name, (int)optp->len));
10609 if (optp->len == 0)
10610 freemsg(mp4ctl);
10611 else
10612 qreply(q, mp4ctl);
10613
10614 return (mp2ctl);
10615 }
10616
10617 /*
10618 * Return ipv6RouteEntryTable and ipv6RouteAttributeTable in one IRE walk, and
10619 * ipv6NetToMediaEntryTable in an NDP walk.
10620 */
10621 static mblk_t *
10622 ip_snmp_get_mib2_ip6_route_media(queue_t *q, mblk_t *mpctl, int level,
10623 ip_stack_t *ipst)
10624 {
10625 struct opthdr *optp;
10626 mblk_t *mp2ctl; /* Returned */
10627 mblk_t *mp3ctl; /* nettomedia */
10628 mblk_t *mp4ctl; /* routeattrs */
10629 iproutedata_t ird;
10630 zoneid_t zoneid;
10631
10632 /*
10633 * make copies of the original message
10634 * - mp2ctl is returned unchanged to the caller for his use
10635 * - mpctl is sent upstream as ipv6RouteEntryTable
10636 * - mp3ctl is sent upstream as ipv6NetToMediaEntryTable
10637 * - mp4ctl is sent upstream as ipv6RouteAttributeTable
10638 */
10639 mp2ctl = copymsg(mpctl);
10640 mp3ctl = copymsg(mpctl);
10641 mp4ctl = copymsg(mpctl);
10642 if (mp3ctl == NULL || mp4ctl == NULL) {
10643 freemsg(mp4ctl);
10644 freemsg(mp3ctl);
10645 freemsg(mp2ctl);
10646 freemsg(mpctl);
10647 return (NULL);
10648 }
10649
10650 bzero(&ird, sizeof (ird));
10651
10652 ird.ird_route.lp_head = mpctl->b_cont;
10653 ird.ird_netmedia.lp_head = mp3ctl->b_cont;
10654 ird.ird_attrs.lp_head = mp4ctl->b_cont;
10655 /*
10656 * If the level has been set the special EXPER_IP_AND_ALL_IRES value,
10657 * then also include ire_testhidden IREs and IRE_IF_CLONE. This is
10658 * intended a temporary solution until a proper MIB API is provided
10659 * that provides complete filtering/caller-opt-in.
10660 */
10661 if (level == EXPER_IP_AND_ALL_IRES)
10662 ird.ird_flags |= IRD_REPORT_ALL;
10663
10664 zoneid = Q_TO_CONN(q)->conn_zoneid;
10665 ire_walk_v6(ip_snmp_get2_v6_route, &ird, zoneid, ipst);
10666
10667 optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)];
10668 optp->level = MIB2_IP6;
10669 optp->name = MIB2_IP6_ROUTE;
10670 optp->len = msgdsize(ird.ird_route.lp_head);
10671 ip3dbg(("ip_snmp_get_mib2_ip6_route_media: level %d, name %d, len %d\n",
10672 (int)optp->level, (int)optp->name, (int)optp->len));
10673 qreply(q, mpctl);
10674
10675 /* ipv6NetToMediaEntryTable in mp3ctl */
10676 ncec_walk(NULL, ip_snmp_get2_v6_media, &ird, ipst);
10677
10678 optp = (struct opthdr *)&mp3ctl->b_rptr[sizeof (struct T_optmgmt_ack)];
10679 optp->level = MIB2_IP6;
10680 optp->name = MIB2_IP6_MEDIA;
10681 optp->len = msgdsize(ird.ird_netmedia.lp_head);
10682 ip3dbg(("ip_snmp_get_mib2_ip6_route_media: level %d, name %d, len %d\n",
10683 (int)optp->level, (int)optp->name, (int)optp->len));
10684 qreply(q, mp3ctl);
10685
10686 /* ipv6RouteAttributeTable in mp4ctl */
10687 optp = (struct opthdr *)&mp4ctl->b_rptr[sizeof (struct T_optmgmt_ack)];
10688 optp->level = MIB2_IP6;
10689 optp->name = EXPER_IP_RTATTR;
10690 optp->len = msgdsize(ird.ird_attrs.lp_head);
10691 ip3dbg(("ip_snmp_get_mib2_ip6_route_media: level %d, name %d, len %d\n",
10692 (int)optp->level, (int)optp->name, (int)optp->len));
10693 if (optp->len == 0)
10694 freemsg(mp4ctl);
10695 else
10696 qreply(q, mp4ctl);
10697
10698 return (mp2ctl);
10699 }
10700
10701 /*
10702 * IPv6 mib: One per ill
10703 */
10704 static mblk_t *
10705 ip_snmp_get_mib2_ip6(queue_t *q, mblk_t *mpctl, ip_stack_t *ipst,
10706 boolean_t legacy_req)
10707 {
10708 struct opthdr *optp;
10709 mblk_t *mp2ctl;
10710 ill_t *ill;
10711 ill_walk_context_t ctx;
10712 mblk_t *mp_tail = NULL;
10713 mib2_ipv6AddrEntry_t mae6;
10714 mib2_ipIfStatsEntry_t *ise;
10715 size_t ise_size, iae_size;
10716
10717 /*
10718 * Make a copy of the original message
10719 */
10720 mp2ctl = copymsg(mpctl);
10721
10722 /* fixed length IPv6 structure ... */
10723
10724 if (legacy_req) {
10725 ise_size = LEGACY_MIB_SIZE(&ipst->ips_ip6_mib,
10726 mib2_ipIfStatsEntry_t);
10727 iae_size = LEGACY_MIB_SIZE(&mae6, mib2_ipv6AddrEntry_t);
10728 } else {
10729 ise_size = sizeof (mib2_ipIfStatsEntry_t);
10730 iae_size = sizeof (mib2_ipv6AddrEntry_t);
10731 }
10732
10733 optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)];
10734 optp->level = MIB2_IP6;
10735 optp->name = 0;
10736 /* Include "unknown interface" ip6_mib */
10737 ipst->ips_ip6_mib.ipIfStatsIPVersion = MIB2_INETADDRESSTYPE_ipv6;
10738 ipst->ips_ip6_mib.ipIfStatsIfIndex =
10739 MIB2_UNKNOWN_INTERFACE; /* Flag to netstat */
10740 SET_MIB(ipst->ips_ip6_mib.ipIfStatsForwarding,
10741 ipst->ips_ipv6_forwarding ? 1 : 2);
10742 SET_MIB(ipst->ips_ip6_mib.ipIfStatsDefaultHopLimit,
10743 ipst->ips_ipv6_def_hops);
10744 SET_MIB(ipst->ips_ip6_mib.ipIfStatsEntrySize,
10745 sizeof (mib2_ipIfStatsEntry_t));
10746 SET_MIB(ipst->ips_ip6_mib.ipIfStatsAddrEntrySize,
10747 sizeof (mib2_ipv6AddrEntry_t));
10748 SET_MIB(ipst->ips_ip6_mib.ipIfStatsRouteEntrySize,
10749 sizeof (mib2_ipv6RouteEntry_t));
10750 SET_MIB(ipst->ips_ip6_mib.ipIfStatsNetToMediaEntrySize,
10751 sizeof (mib2_ipv6NetToMediaEntry_t));
10752 SET_MIB(ipst->ips_ip6_mib.ipIfStatsMemberEntrySize,
10753 sizeof (ipv6_member_t));
10754 SET_MIB(ipst->ips_ip6_mib.ipIfStatsGroupSourceEntrySize,
10755 sizeof (ipv6_grpsrc_t));
10756
10757 /*
10758 * Synchronize 64- and 32-bit counters
10759 */
10760 SYNC32_MIB(&ipst->ips_ip6_mib, ipIfStatsInReceives,
10761 ipIfStatsHCInReceives);
10762 SYNC32_MIB(&ipst->ips_ip6_mib, ipIfStatsInDelivers,
10763 ipIfStatsHCInDelivers);
10764 SYNC32_MIB(&ipst->ips_ip6_mib, ipIfStatsOutRequests,
10765 ipIfStatsHCOutRequests);
10766 SYNC32_MIB(&ipst->ips_ip6_mib, ipIfStatsOutForwDatagrams,
10767 ipIfStatsHCOutForwDatagrams);
10768 SYNC32_MIB(&ipst->ips_ip6_mib, ipIfStatsOutMcastPkts,
10769 ipIfStatsHCOutMcastPkts);
10770 SYNC32_MIB(&ipst->ips_ip6_mib, ipIfStatsInMcastPkts,
10771 ipIfStatsHCInMcastPkts);
10772
10773 if (!snmp_append_data2(mpctl->b_cont, &mp_tail,
10774 (char *)&ipst->ips_ip6_mib, (int)ise_size)) {
10775 ip1dbg(("ip_snmp_get_mib2_ip6: failed to allocate %u bytes\n",
10776 (uint_t)ise_size));
10777 } else if (legacy_req) {
10778 /* Adjust the EntrySize fields for legacy requests. */
10779 ise =
10780 (mib2_ipIfStatsEntry_t *)(mp_tail->b_wptr - (int)ise_size);
10781 SET_MIB(ise->ipIfStatsEntrySize, ise_size);
10782 SET_MIB(ise->ipIfStatsAddrEntrySize, iae_size);
10783 }
10784
10785 rw_enter(&ipst->ips_ill_g_lock, RW_READER);
10786 ill = ILL_START_WALK_V6(&ctx, ipst);
10787 for (; ill != NULL; ill = ill_next(&ctx, ill)) {
10788 ill->ill_ip_mib->ipIfStatsIfIndex =
10789 ill->ill_phyint->phyint_ifindex;
10790 SET_MIB(ill->ill_ip_mib->ipIfStatsForwarding,
10791 ipst->ips_ipv6_forwarding ? 1 : 2);
10792 SET_MIB(ill->ill_ip_mib->ipIfStatsDefaultHopLimit,
10793 ill->ill_max_hops);
10794
10795 /*
10796 * Synchronize 64- and 32-bit counters
10797 */
10798 SYNC32_MIB(ill->ill_ip_mib, ipIfStatsInReceives,
10799 ipIfStatsHCInReceives);
10800 SYNC32_MIB(ill->ill_ip_mib, ipIfStatsInDelivers,
10801 ipIfStatsHCInDelivers);
10802 SYNC32_MIB(ill->ill_ip_mib, ipIfStatsOutRequests,
10803 ipIfStatsHCOutRequests);
10804 SYNC32_MIB(ill->ill_ip_mib, ipIfStatsOutForwDatagrams,
10805 ipIfStatsHCOutForwDatagrams);
10806 SYNC32_MIB(ill->ill_ip_mib, ipIfStatsOutMcastPkts,
10807 ipIfStatsHCOutMcastPkts);
10808 SYNC32_MIB(ill->ill_ip_mib, ipIfStatsInMcastPkts,
10809 ipIfStatsHCInMcastPkts);
10810
10811 if (!snmp_append_data2(mpctl->b_cont, &mp_tail,
10812 (char *)ill->ill_ip_mib, (int)ise_size)) {
10813 ip1dbg(("ip_snmp_get_mib2_ip6: failed to allocate "
10814 "%u bytes\n", (uint_t)ise_size));
10815 } else if (legacy_req) {
10816 /* Adjust the EntrySize fields for legacy requests. */
10817 ise = (mib2_ipIfStatsEntry_t *)(mp_tail->b_wptr -
10818 (int)ise_size);
10819 SET_MIB(ise->ipIfStatsEntrySize, ise_size);
10820 SET_MIB(ise->ipIfStatsAddrEntrySize, iae_size);
10821 }
10822 }
10823 rw_exit(&ipst->ips_ill_g_lock);
10824
10825 optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont);
10826 ip3dbg(("ip_snmp_get_mib2_ip6: level %d, name %d, len %d\n",
10827 (int)optp->level, (int)optp->name, (int)optp->len));
10828 qreply(q, mpctl);
10829 return (mp2ctl);
10830 }
10831
10832 /*
10833 * ICMPv6 mib: One per ill
10834 */
10835 static mblk_t *
10836 ip_snmp_get_mib2_icmp6(queue_t *q, mblk_t *mpctl, ip_stack_t *ipst)
10837 {
10838 struct opthdr *optp;
10839 mblk_t *mp2ctl;
10840 ill_t *ill;
10841 ill_walk_context_t ctx;
10842 mblk_t *mp_tail = NULL;
10843 /*
10844 * Make a copy of the original message
10845 */
10846 mp2ctl = copymsg(mpctl);
10847
10848 /* fixed length ICMPv6 structure ... */
10849
10850 optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)];
10851 optp->level = MIB2_ICMP6;
10852 optp->name = 0;
10853 /* Include "unknown interface" icmp6_mib */
10854 ipst->ips_icmp6_mib.ipv6IfIcmpIfIndex =
10855 MIB2_UNKNOWN_INTERFACE; /* netstat flag */
10856 ipst->ips_icmp6_mib.ipv6IfIcmpEntrySize =
10857 sizeof (mib2_ipv6IfIcmpEntry_t);
10858 if (!snmp_append_data2(mpctl->b_cont, &mp_tail,
10859 (char *)&ipst->ips_icmp6_mib,
10860 (int)sizeof (ipst->ips_icmp6_mib))) {
10861 ip1dbg(("ip_snmp_get_mib2_icmp6: failed to allocate %u bytes\n",
10862 (uint_t)sizeof (ipst->ips_icmp6_mib)));
10863 }
10864
10865 rw_enter(&ipst->ips_ill_g_lock, RW_READER);
10866 ill = ILL_START_WALK_V6(&ctx, ipst);
10867 for (; ill != NULL; ill = ill_next(&ctx, ill)) {
10868 ill->ill_icmp6_mib->ipv6IfIcmpIfIndex =
10869 ill->ill_phyint->phyint_ifindex;
10870 if (!snmp_append_data2(mpctl->b_cont, &mp_tail,
10871 (char *)ill->ill_icmp6_mib,
10872 (int)sizeof (*ill->ill_icmp6_mib))) {
10873 ip1dbg(("ip_snmp_get_mib2_icmp6: failed to allocate "
10874 "%u bytes\n",
10875 (uint_t)sizeof (*ill->ill_icmp6_mib)));
10876 }
10877 }
10878 rw_exit(&ipst->ips_ill_g_lock);
10879
10880 optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont);
10881 ip3dbg(("ip_snmp_get_mib2_icmp6: level %d, name %d, len %d\n",
10882 (int)optp->level, (int)optp->name, (int)optp->len));
10883 qreply(q, mpctl);
10884 return (mp2ctl);
10885 }
10886
10887 /*
10888 * ire_walk routine to create both ipRouteEntryTable and
10889 * ipRouteAttributeTable in one IRE walk
10890 */
10891 static void
10892 ip_snmp_get2_v4(ire_t *ire, iproutedata_t *ird)
10893 {
10894 ill_t *ill;
10895 mib2_ipRouteEntry_t *re;
10896 mib2_ipAttributeEntry_t iaes;
10897 tsol_ire_gw_secattr_t *attrp;
10898 tsol_gc_t *gc = NULL;
10899 tsol_gcgrp_t *gcgrp = NULL;
10900 ip_stack_t *ipst = ire->ire_ipst;
10901
10902 ASSERT(ire->ire_ipversion == IPV4_VERSION);
10903
10904 if (!(ird->ird_flags & IRD_REPORT_ALL)) {
10905 if (ire->ire_testhidden)
10906 return;
10907 if (ire->ire_type & IRE_IF_CLONE)
10908 return;
10909 }
10910
10911 if ((re = kmem_zalloc(sizeof (*re), KM_NOSLEEP)) == NULL)
10912 return;
10913
10914 if ((attrp = ire->ire_gw_secattr) != NULL) {
10915 mutex_enter(&attrp->igsa_lock);
10916 if ((gc = attrp->igsa_gc) != NULL) {
10917 gcgrp = gc->gc_grp;
10918 ASSERT(gcgrp != NULL);
10919 rw_enter(&gcgrp->gcgrp_rwlock, RW_READER);
10920 }
10921 mutex_exit(&attrp->igsa_lock);
10922 }
10923 /*
10924 * Return all IRE types for route table... let caller pick and choose
10925 */
10926 re->ipRouteDest = ire->ire_addr;
10927 ill = ire->ire_ill;
10928 re->ipRouteIfIndex.o_length = 0;
10929 if (ill != NULL) {
10930 ill_get_name(ill, re->ipRouteIfIndex.o_bytes, OCTET_LENGTH);
10931 re->ipRouteIfIndex.o_length =
10932 mi_strlen(re->ipRouteIfIndex.o_bytes);
10933 }
10934 re->ipRouteMetric1 = -1;
10935 re->ipRouteMetric2 = -1;
10936 re->ipRouteMetric3 = -1;
10937 re->ipRouteMetric4 = -1;
10938
10939 re->ipRouteNextHop = ire->ire_gateway_addr;
10940 /* indirect(4), direct(3), or invalid(2) */
10941 if (ire->ire_flags & (RTF_REJECT | RTF_BLACKHOLE))
10942 re->ipRouteType = 2;
10943 else if (ire->ire_type & IRE_ONLINK)
10944 re->ipRouteType = 3;
10945 else
10946 re->ipRouteType = 4;
10947
10948 re->ipRouteProto = -1;
10949 re->ipRouteAge = gethrestime_sec() - ire->ire_create_time;
10950 re->ipRouteMask = ire->ire_mask;
10951 re->ipRouteMetric5 = -1;
10952 re->ipRouteInfo.re_max_frag = ire->ire_metrics.iulp_mtu;
10953 if (ire->ire_ill != NULL && re->ipRouteInfo.re_max_frag == 0)
10954 re->ipRouteInfo.re_max_frag = ire->ire_ill->ill_mtu;
10955
10956 re->ipRouteInfo.re_frag_flag = 0;
10957 re->ipRouteInfo.re_rtt = 0;
10958 re->ipRouteInfo.re_src_addr = 0;
10959 re->ipRouteInfo.re_ref = ire->ire_refcnt;
10960 re->ipRouteInfo.re_obpkt = ire->ire_ob_pkt_count;
10961 re->ipRouteInfo.re_ibpkt = ire->ire_ib_pkt_count;
10962 re->ipRouteInfo.re_flags = ire->ire_flags;
10963
10964 /* Add the IRE_IF_CLONE's counters to their parent IRE_INTERFACE */
10965 if (ire->ire_type & IRE_INTERFACE) {
10966 ire_t *child;
10967
10968 rw_enter(&ipst->ips_ire_dep_lock, RW_READER);
10969 child = ire->ire_dep_children;
10970 while (child != NULL) {
10971 re->ipRouteInfo.re_obpkt += child->ire_ob_pkt_count;
10972 re->ipRouteInfo.re_ibpkt += child->ire_ib_pkt_count;
10973 child = child->ire_dep_sib_next;
10974 }
10975 rw_exit(&ipst->ips_ire_dep_lock);
10976 }
10977
10978 if (ire->ire_flags & RTF_DYNAMIC) {
10979 re->ipRouteInfo.re_ire_type = IRE_HOST_REDIRECT;
10980 } else {
10981 re->ipRouteInfo.re_ire_type = ire->ire_type;
10982 }
10983
10984 if (!snmp_append_data2(ird->ird_route.lp_head, &ird->ird_route.lp_tail,
10985 (char *)re, (int)sizeof (*re))) {
10986 ip1dbg(("ip_snmp_get2_v4: failed to allocate %u bytes\n",
10987 (uint_t)sizeof (*re)));
10988 }
10989
10990 if (gc != NULL) {
10991 iaes.iae_routeidx = ird->ird_idx;
10992 iaes.iae_doi = gc->gc_db->gcdb_doi;
10993 iaes.iae_slrange = gc->gc_db->gcdb_slrange;
10994
10995 if (!snmp_append_data2(ird->ird_attrs.lp_head,
10996 &ird->ird_attrs.lp_tail, (char *)&iaes, sizeof (iaes))) {
10997 ip1dbg(("ip_snmp_get2_v4: failed to allocate %u "
10998 "bytes\n", (uint_t)sizeof (iaes)));
10999 }
11000 }
11001
11002 /* bump route index for next pass */
11003 ird->ird_idx++;
11004
11005 kmem_free(re, sizeof (*re));
11006 if (gcgrp != NULL)
11007 rw_exit(&gcgrp->gcgrp_rwlock);
11008 }
11009
11010 /*
11011 * ire_walk routine to create ipv6RouteEntryTable and ipRouteEntryTable.
11012 */
11013 static void
11014 ip_snmp_get2_v6_route(ire_t *ire, iproutedata_t *ird)
11015 {
11016 ill_t *ill;
11017 mib2_ipv6RouteEntry_t *re;
11018 mib2_ipAttributeEntry_t iaes;
11019 tsol_ire_gw_secattr_t *attrp;
11020 tsol_gc_t *gc = NULL;
11021 tsol_gcgrp_t *gcgrp = NULL;
11022 ip_stack_t *ipst = ire->ire_ipst;
11023
11024 ASSERT(ire->ire_ipversion == IPV6_VERSION);
11025
11026 if (!(ird->ird_flags & IRD_REPORT_ALL)) {
11027 if (ire->ire_testhidden)
11028 return;
11029 if (ire->ire_type & IRE_IF_CLONE)
11030 return;
11031 }
11032
11033 if ((re = kmem_zalloc(sizeof (*re), KM_NOSLEEP)) == NULL)
11034 return;
11035
11036 if ((attrp = ire->ire_gw_secattr) != NULL) {
11037 mutex_enter(&attrp->igsa_lock);
11038 if ((gc = attrp->igsa_gc) != NULL) {
11039 gcgrp = gc->gc_grp;
11040 ASSERT(gcgrp != NULL);
11041 rw_enter(&gcgrp->gcgrp_rwlock, RW_READER);
11042 }
11043 mutex_exit(&attrp->igsa_lock);
11044 }
11045 /*
11046 * Return all IRE types for route table... let caller pick and choose
11047 */
11048 re->ipv6RouteDest = ire->ire_addr_v6;
11049 re->ipv6RoutePfxLength = ip_mask_to_plen_v6(&ire->ire_mask_v6);
11050 re->ipv6RouteIndex = 0; /* Unique when multiple with same dest/plen */
11051 re->ipv6RouteIfIndex.o_length = 0;
11052 ill = ire->ire_ill;
11053 if (ill != NULL) {
11054 ill_get_name(ill, re->ipv6RouteIfIndex.o_bytes, OCTET_LENGTH);
11055 re->ipv6RouteIfIndex.o_length =
11056 mi_strlen(re->ipv6RouteIfIndex.o_bytes);
11057 }
11058
11059 ASSERT(!(ire->ire_type & IRE_BROADCAST));
11060
11061 mutex_enter(&ire->ire_lock);
11062 re->ipv6RouteNextHop = ire->ire_gateway_addr_v6;
11063 mutex_exit(&ire->ire_lock);
11064
11065 /* remote(4), local(3), or discard(2) */
11066 if (ire->ire_flags & (RTF_REJECT | RTF_BLACKHOLE))
11067 re->ipv6RouteType = 2;
11068 else if (ire->ire_type & IRE_ONLINK)
11069 re->ipv6RouteType = 3;
11070 else
11071 re->ipv6RouteType = 4;
11072
11073 re->ipv6RouteProtocol = -1;
11074 re->ipv6RoutePolicy = 0;
11075 re->ipv6RouteAge = gethrestime_sec() - ire->ire_create_time;
11076 re->ipv6RouteNextHopRDI = 0;
11077 re->ipv6RouteWeight = 0;
11078 re->ipv6RouteMetric = 0;
11079 re->ipv6RouteInfo.re_max_frag = ire->ire_metrics.iulp_mtu;
11080 if (ire->ire_ill != NULL && re->ipv6RouteInfo.re_max_frag == 0)
11081 re->ipv6RouteInfo.re_max_frag = ire->ire_ill->ill_mtu;
11082
11083 re->ipv6RouteInfo.re_frag_flag = 0;
11084 re->ipv6RouteInfo.re_rtt = 0;
11085 re->ipv6RouteInfo.re_src_addr = ipv6_all_zeros;
11086 re->ipv6RouteInfo.re_obpkt = ire->ire_ob_pkt_count;
11087 re->ipv6RouteInfo.re_ibpkt = ire->ire_ib_pkt_count;
11088 re->ipv6RouteInfo.re_ref = ire->ire_refcnt;
11089 re->ipv6RouteInfo.re_flags = ire->ire_flags;
11090
11091 /* Add the IRE_IF_CLONE's counters to their parent IRE_INTERFACE */
11092 if (ire->ire_type & IRE_INTERFACE) {
11093 ire_t *child;
11094
11095 rw_enter(&ipst->ips_ire_dep_lock, RW_READER);
11096 child = ire->ire_dep_children;
11097 while (child != NULL) {
11098 re->ipv6RouteInfo.re_obpkt += child->ire_ob_pkt_count;
11099 re->ipv6RouteInfo.re_ibpkt += child->ire_ib_pkt_count;
11100 child = child->ire_dep_sib_next;
11101 }
11102 rw_exit(&ipst->ips_ire_dep_lock);
11103 }
11104 if (ire->ire_flags & RTF_DYNAMIC) {
11105 re->ipv6RouteInfo.re_ire_type = IRE_HOST_REDIRECT;
11106 } else {
11107 re->ipv6RouteInfo.re_ire_type = ire->ire_type;
11108 }
11109
11110 if (!snmp_append_data2(ird->ird_route.lp_head, &ird->ird_route.lp_tail,
11111 (char *)re, (int)sizeof (*re))) {
11112 ip1dbg(("ip_snmp_get2_v6: failed to allocate %u bytes\n",
11113 (uint_t)sizeof (*re)));
11114 }
11115
11116 if (gc != NULL) {
11117 iaes.iae_routeidx = ird->ird_idx;
11118 iaes.iae_doi = gc->gc_db->gcdb_doi;
11119 iaes.iae_slrange = gc->gc_db->gcdb_slrange;
11120
11121 if (!snmp_append_data2(ird->ird_attrs.lp_head,
11122 &ird->ird_attrs.lp_tail, (char *)&iaes, sizeof (iaes))) {
11123 ip1dbg(("ip_snmp_get2_v6: failed to allocate %u "
11124 "bytes\n", (uint_t)sizeof (iaes)));
11125 }
11126 }
11127
11128 /* bump route index for next pass */
11129 ird->ird_idx++;
11130
11131 kmem_free(re, sizeof (*re));
11132 if (gcgrp != NULL)
11133 rw_exit(&gcgrp->gcgrp_rwlock);
11134 }
11135
11136 /*
11137 * ncec_walk routine to create ipv6NetToMediaEntryTable
11138 */
11139 static int
11140 ip_snmp_get2_v6_media(ncec_t *ncec, iproutedata_t *ird)
11141 {
11142 ill_t *ill;
11143 mib2_ipv6NetToMediaEntry_t ntme;
11144
11145 ill = ncec->ncec_ill;
11146 /* skip arpce entries, and loopback ncec entries */
11147 if (ill->ill_isv6 == B_FALSE || ill->ill_net_type == IRE_LOOPBACK)
11148 return (0);
11149 /*
11150 * Neighbor cache entry attached to IRE with on-link
11151 * destination.
11152 * We report all IPMP groups on ncec_ill which is normally the upper.
11153 */
11154 ntme.ipv6NetToMediaIfIndex = ill->ill_phyint->phyint_ifindex;
11155 ntme.ipv6NetToMediaNetAddress = ncec->ncec_addr;
11156 ntme.ipv6NetToMediaPhysAddress.o_length = ill->ill_phys_addr_length;
11157 if (ncec->ncec_lladdr != NULL) {
11158 bcopy(ncec->ncec_lladdr, ntme.ipv6NetToMediaPhysAddress.o_bytes,
11159 ntme.ipv6NetToMediaPhysAddress.o_length);
11160 }
11161 /*
11162 * Note: Returns ND_* states. Should be:
11163 * reachable(1), stale(2), delay(3), probe(4),
11164 * invalid(5), unknown(6)
11165 */
11166 ntme.ipv6NetToMediaState = ncec->ncec_state;
11167 ntme.ipv6NetToMediaLastUpdated = 0;
11168
11169 /* other(1), dynamic(2), static(3), local(4) */
11170 if (NCE_MYADDR(ncec)) {
11171 ntme.ipv6NetToMediaType = 4;
11172 } else if (ncec->ncec_flags & NCE_F_PUBLISH) {
11173 ntme.ipv6NetToMediaType = 1; /* proxy */
11174 } else if (ncec->ncec_flags & NCE_F_STATIC) {
11175 ntme.ipv6NetToMediaType = 3;
11176 } else if (ncec->ncec_flags & (NCE_F_MCAST|NCE_F_BCAST)) {
11177 ntme.ipv6NetToMediaType = 1;
11178 } else {
11179 ntme.ipv6NetToMediaType = 2;
11180 }
11181
11182 if (!snmp_append_data2(ird->ird_netmedia.lp_head,
11183 &ird->ird_netmedia.lp_tail, (char *)&ntme, sizeof (ntme))) {
11184 ip1dbg(("ip_snmp_get2_v6_media: failed to allocate %u bytes\n",
11185 (uint_t)sizeof (ntme)));
11186 }
11187 return (0);
11188 }
11189
11190 int
11191 nce2ace(ncec_t *ncec)
11192 {
11193 int flags = 0;
11194
11195 if (NCE_ISREACHABLE(ncec))
11196 flags |= ACE_F_RESOLVED;
11197 if (ncec->ncec_flags & NCE_F_AUTHORITY)
11198 flags |= ACE_F_AUTHORITY;
11199 if (ncec->ncec_flags & NCE_F_PUBLISH)
11200 flags |= ACE_F_PUBLISH;
11201 if ((ncec->ncec_flags & NCE_F_NONUD) != 0)
11202 flags |= ACE_F_PERMANENT;
11203 if (NCE_MYADDR(ncec))
11204 flags |= (ACE_F_MYADDR | ACE_F_AUTHORITY);
11205 if (ncec->ncec_flags & NCE_F_UNVERIFIED)
11206 flags |= ACE_F_UNVERIFIED;
11207 if (ncec->ncec_flags & NCE_F_AUTHORITY)
11208 flags |= ACE_F_AUTHORITY;
11209 if (ncec->ncec_flags & NCE_F_DELAYED)
11210 flags |= ACE_F_DELAYED;
11211 return (flags);
11212 }
11213
11214 /*
11215 * ncec_walk routine to create ipNetToMediaEntryTable
11216 */
11217 static int
11218 ip_snmp_get2_v4_media(ncec_t *ncec, iproutedata_t *ird)
11219 {
11220 ill_t *ill;
11221 mib2_ipNetToMediaEntry_t ntme;
11222 const char *name = "unknown";
11223 ipaddr_t ncec_addr;
11224
11225 ill = ncec->ncec_ill;
11226 if (ill->ill_isv6 || (ncec->ncec_flags & NCE_F_BCAST) ||
11227 ill->ill_net_type == IRE_LOOPBACK)
11228 return (0);
11229
11230 /* We report all IPMP groups on ncec_ill which is normally the upper. */
11231 name = ill->ill_name;
11232 /* Based on RFC 4293: other(1), inval(2), dyn(3), stat(4) */
11233 if (NCE_MYADDR(ncec)) {
11234 ntme.ipNetToMediaType = 4;
11235 } else if (ncec->ncec_flags & (NCE_F_MCAST|NCE_F_BCAST|NCE_F_PUBLISH)) {
11236 ntme.ipNetToMediaType = 1;
11237 } else {
11238 ntme.ipNetToMediaType = 3;
11239 }
11240 ntme.ipNetToMediaIfIndex.o_length = MIN(OCTET_LENGTH, strlen(name));
11241 bcopy(name, ntme.ipNetToMediaIfIndex.o_bytes,
11242 ntme.ipNetToMediaIfIndex.o_length);
11243
11244 IN6_V4MAPPED_TO_IPADDR(&ncec->ncec_addr, ncec_addr);
11245 bcopy(&ncec_addr, &ntme.ipNetToMediaNetAddress, sizeof (ncec_addr));
11246
11247 ntme.ipNetToMediaInfo.ntm_mask.o_length = sizeof (ipaddr_t);
11248 ncec_addr = INADDR_BROADCAST;
11249 bcopy(&ncec_addr, ntme.ipNetToMediaInfo.ntm_mask.o_bytes,
11250 sizeof (ncec_addr));
11251 /*
11252 * map all the flags to the ACE counterpart.
11253 */
11254 ntme.ipNetToMediaInfo.ntm_flags = nce2ace(ncec);
11255
11256 ntme.ipNetToMediaPhysAddress.o_length =
11257 MIN(OCTET_LENGTH, ill->ill_phys_addr_length);
11258
11259 if (!NCE_ISREACHABLE(ncec))
11260 ntme.ipNetToMediaPhysAddress.o_length = 0;
11261 else {
11262 if (ncec->ncec_lladdr != NULL) {
11263 bcopy(ncec->ncec_lladdr,
11264 ntme.ipNetToMediaPhysAddress.o_bytes,
11265 ntme.ipNetToMediaPhysAddress.o_length);
11266 }
11267 }
11268
11269 if (!snmp_append_data2(ird->ird_netmedia.lp_head,
11270 &ird->ird_netmedia.lp_tail, (char *)&ntme, sizeof (ntme))) {
11271 ip1dbg(("ip_snmp_get2_v4_media: failed to allocate %u bytes\n",
11272 (uint_t)sizeof (ntme)));
11273 }
11274 return (0);
11275 }
11276
11277 /*
11278 * return (0) if invalid set request, 1 otherwise, including non-tcp requests
11279 */
11280 /* ARGSUSED */
11281 int
11282 ip_snmp_set(queue_t *q, int level, int name, uchar_t *ptr, int len)
11283 {
11284 switch (level) {
11285 case MIB2_IP:
11286 case MIB2_ICMP:
11287 switch (name) {
11288 default:
11289 break;
11290 }
11291 return (1);
11292 default:
11293 return (1);
11294 }
11295 }
11296
11297 /*
11298 * When there exists both a 64- and 32-bit counter of a particular type
11299 * (i.e., InReceives), only the 64-bit counters are added.
11300 */
11301 void
11302 ip_mib2_add_ip_stats(mib2_ipIfStatsEntry_t *o1, mib2_ipIfStatsEntry_t *o2)
11303 {
11304 UPDATE_MIB(o1, ipIfStatsInHdrErrors, o2->ipIfStatsInHdrErrors);
11305 UPDATE_MIB(o1, ipIfStatsInTooBigErrors, o2->ipIfStatsInTooBigErrors);
11306 UPDATE_MIB(o1, ipIfStatsInNoRoutes, o2->ipIfStatsInNoRoutes);
11307 UPDATE_MIB(o1, ipIfStatsInAddrErrors, o2->ipIfStatsInAddrErrors);
11308 UPDATE_MIB(o1, ipIfStatsInUnknownProtos, o2->ipIfStatsInUnknownProtos);
11309 UPDATE_MIB(o1, ipIfStatsInTruncatedPkts, o2->ipIfStatsInTruncatedPkts);
11310 UPDATE_MIB(o1, ipIfStatsInDiscards, o2->ipIfStatsInDiscards);
11311 UPDATE_MIB(o1, ipIfStatsOutDiscards, o2->ipIfStatsOutDiscards);
11312 UPDATE_MIB(o1, ipIfStatsOutFragOKs, o2->ipIfStatsOutFragOKs);
11313 UPDATE_MIB(o1, ipIfStatsOutFragFails, o2->ipIfStatsOutFragFails);
11314 UPDATE_MIB(o1, ipIfStatsOutFragCreates, o2->ipIfStatsOutFragCreates);
11315 UPDATE_MIB(o1, ipIfStatsReasmReqds, o2->ipIfStatsReasmReqds);
11316 UPDATE_MIB(o1, ipIfStatsReasmOKs, o2->ipIfStatsReasmOKs);
11317 UPDATE_MIB(o1, ipIfStatsReasmFails, o2->ipIfStatsReasmFails);
11318 UPDATE_MIB(o1, ipIfStatsOutNoRoutes, o2->ipIfStatsOutNoRoutes);
11319 UPDATE_MIB(o1, ipIfStatsReasmDuplicates, o2->ipIfStatsReasmDuplicates);
11320 UPDATE_MIB(o1, ipIfStatsReasmPartDups, o2->ipIfStatsReasmPartDups);
11321 UPDATE_MIB(o1, ipIfStatsForwProhibits, o2->ipIfStatsForwProhibits);
11322 UPDATE_MIB(o1, udpInCksumErrs, o2->udpInCksumErrs);
11323 UPDATE_MIB(o1, udpInOverflows, o2->udpInOverflows);
11324 UPDATE_MIB(o1, rawipInOverflows, o2->rawipInOverflows);
11325 UPDATE_MIB(o1, ipIfStatsInWrongIPVersion,
11326 o2->ipIfStatsInWrongIPVersion);
11327 UPDATE_MIB(o1, ipIfStatsOutWrongIPVersion,
11328 o2->ipIfStatsInWrongIPVersion);
11329 UPDATE_MIB(o1, ipIfStatsOutSwitchIPVersion,
11330 o2->ipIfStatsOutSwitchIPVersion);
11331 UPDATE_MIB(o1, ipIfStatsHCInReceives, o2->ipIfStatsHCInReceives);
11332 UPDATE_MIB(o1, ipIfStatsHCInOctets, o2->ipIfStatsHCInOctets);
11333 UPDATE_MIB(o1, ipIfStatsHCInForwDatagrams,
11334 o2->ipIfStatsHCInForwDatagrams);
11335 UPDATE_MIB(o1, ipIfStatsHCInDelivers, o2->ipIfStatsHCInDelivers);
11336 UPDATE_MIB(o1, ipIfStatsHCOutRequests, o2->ipIfStatsHCOutRequests);
11337 UPDATE_MIB(o1, ipIfStatsHCOutForwDatagrams,
11338 o2->ipIfStatsHCOutForwDatagrams);
11339 UPDATE_MIB(o1, ipIfStatsOutFragReqds, o2->ipIfStatsOutFragReqds);
11340 UPDATE_MIB(o1, ipIfStatsHCOutTransmits, o2->ipIfStatsHCOutTransmits);
11341 UPDATE_MIB(o1, ipIfStatsHCOutOctets, o2->ipIfStatsHCOutOctets);
11342 UPDATE_MIB(o1, ipIfStatsHCInMcastPkts, o2->ipIfStatsHCInMcastPkts);
11343 UPDATE_MIB(o1, ipIfStatsHCInMcastOctets, o2->ipIfStatsHCInMcastOctets);
11344 UPDATE_MIB(o1, ipIfStatsHCOutMcastPkts, o2->ipIfStatsHCOutMcastPkts);
11345 UPDATE_MIB(o1, ipIfStatsHCOutMcastOctets,
11346 o2->ipIfStatsHCOutMcastOctets);
11347 UPDATE_MIB(o1, ipIfStatsHCInBcastPkts, o2->ipIfStatsHCInBcastPkts);
11348 UPDATE_MIB(o1, ipIfStatsHCOutBcastPkts, o2->ipIfStatsHCOutBcastPkts);
11349 UPDATE_MIB(o1, ipsecInSucceeded, o2->ipsecInSucceeded);
11350 UPDATE_MIB(o1, ipsecInFailed, o2->ipsecInFailed);
11351 UPDATE_MIB(o1, ipInCksumErrs, o2->ipInCksumErrs);
11352 UPDATE_MIB(o1, tcpInErrs, o2->tcpInErrs);
11353 UPDATE_MIB(o1, udpNoPorts, o2->udpNoPorts);
11354 }
11355
11356 void
11357 ip_mib2_add_icmp6_stats(mib2_ipv6IfIcmpEntry_t *o1, mib2_ipv6IfIcmpEntry_t *o2)
11358 {
11359 UPDATE_MIB(o1, ipv6IfIcmpInMsgs, o2->ipv6IfIcmpInMsgs);
11360 UPDATE_MIB(o1, ipv6IfIcmpInErrors, o2->ipv6IfIcmpInErrors);
11361 UPDATE_MIB(o1, ipv6IfIcmpInDestUnreachs, o2->ipv6IfIcmpInDestUnreachs);
11362 UPDATE_MIB(o1, ipv6IfIcmpInAdminProhibs, o2->ipv6IfIcmpInAdminProhibs);
11363 UPDATE_MIB(o1, ipv6IfIcmpInTimeExcds, o2->ipv6IfIcmpInTimeExcds);
11364 UPDATE_MIB(o1, ipv6IfIcmpInParmProblems, o2->ipv6IfIcmpInParmProblems);
11365 UPDATE_MIB(o1, ipv6IfIcmpInPktTooBigs, o2->ipv6IfIcmpInPktTooBigs);
11366 UPDATE_MIB(o1, ipv6IfIcmpInEchos, o2->ipv6IfIcmpInEchos);
11367 UPDATE_MIB(o1, ipv6IfIcmpInEchoReplies, o2->ipv6IfIcmpInEchoReplies);
11368 UPDATE_MIB(o1, ipv6IfIcmpInRouterSolicits,
11369 o2->ipv6IfIcmpInRouterSolicits);
11370 UPDATE_MIB(o1, ipv6IfIcmpInRouterAdvertisements,
11371 o2->ipv6IfIcmpInRouterAdvertisements);
11372 UPDATE_MIB(o1, ipv6IfIcmpInNeighborSolicits,
11373 o2->ipv6IfIcmpInNeighborSolicits);
11374 UPDATE_MIB(o1, ipv6IfIcmpInNeighborAdvertisements,
11375 o2->ipv6IfIcmpInNeighborAdvertisements);
11376 UPDATE_MIB(o1, ipv6IfIcmpInRedirects, o2->ipv6IfIcmpInRedirects);
11377 UPDATE_MIB(o1, ipv6IfIcmpInGroupMembQueries,
11378 o2->ipv6IfIcmpInGroupMembQueries);
11379 UPDATE_MIB(o1, ipv6IfIcmpInGroupMembResponses,
11380 o2->ipv6IfIcmpInGroupMembResponses);
11381 UPDATE_MIB(o1, ipv6IfIcmpInGroupMembReductions,
11382 o2->ipv6IfIcmpInGroupMembReductions);
11383 UPDATE_MIB(o1, ipv6IfIcmpOutMsgs, o2->ipv6IfIcmpOutMsgs);
11384 UPDATE_MIB(o1, ipv6IfIcmpOutErrors, o2->ipv6IfIcmpOutErrors);
11385 UPDATE_MIB(o1, ipv6IfIcmpOutDestUnreachs,
11386 o2->ipv6IfIcmpOutDestUnreachs);
11387 UPDATE_MIB(o1, ipv6IfIcmpOutAdminProhibs,
11388 o2->ipv6IfIcmpOutAdminProhibs);
11389 UPDATE_MIB(o1, ipv6IfIcmpOutTimeExcds, o2->ipv6IfIcmpOutTimeExcds);
11390 UPDATE_MIB(o1, ipv6IfIcmpOutParmProblems,
11391 o2->ipv6IfIcmpOutParmProblems);
11392 UPDATE_MIB(o1, ipv6IfIcmpOutPktTooBigs, o2->ipv6IfIcmpOutPktTooBigs);
11393 UPDATE_MIB(o1, ipv6IfIcmpOutEchos, o2->ipv6IfIcmpOutEchos);
11394 UPDATE_MIB(o1, ipv6IfIcmpOutEchoReplies, o2->ipv6IfIcmpOutEchoReplies);
11395 UPDATE_MIB(o1, ipv6IfIcmpOutRouterSolicits,
11396 o2->ipv6IfIcmpOutRouterSolicits);
11397 UPDATE_MIB(o1, ipv6IfIcmpOutRouterAdvertisements,
11398 o2->ipv6IfIcmpOutRouterAdvertisements);
11399 UPDATE_MIB(o1, ipv6IfIcmpOutNeighborSolicits,
11400 o2->ipv6IfIcmpOutNeighborSolicits);
11401 UPDATE_MIB(o1, ipv6IfIcmpOutNeighborAdvertisements,
11402 o2->ipv6IfIcmpOutNeighborAdvertisements);
11403 UPDATE_MIB(o1, ipv6IfIcmpOutRedirects, o2->ipv6IfIcmpOutRedirects);
11404 UPDATE_MIB(o1, ipv6IfIcmpOutGroupMembQueries,
11405 o2->ipv6IfIcmpOutGroupMembQueries);
11406 UPDATE_MIB(o1, ipv6IfIcmpOutGroupMembResponses,
11407 o2->ipv6IfIcmpOutGroupMembResponses);
11408 UPDATE_MIB(o1, ipv6IfIcmpOutGroupMembReductions,
11409 o2->ipv6IfIcmpOutGroupMembReductions);
11410 UPDATE_MIB(o1, ipv6IfIcmpInOverflows, o2->ipv6IfIcmpInOverflows);
11411 UPDATE_MIB(o1, ipv6IfIcmpBadHoplimit, o2->ipv6IfIcmpBadHoplimit);
11412 UPDATE_MIB(o1, ipv6IfIcmpInBadNeighborAdvertisements,
11413 o2->ipv6IfIcmpInBadNeighborAdvertisements);
11414 UPDATE_MIB(o1, ipv6IfIcmpInBadNeighborSolicitations,
11415 o2->ipv6IfIcmpInBadNeighborSolicitations);
11416 UPDATE_MIB(o1, ipv6IfIcmpInBadRedirects, o2->ipv6IfIcmpInBadRedirects);
11417 UPDATE_MIB(o1, ipv6IfIcmpInGroupMembTotal,
11418 o2->ipv6IfIcmpInGroupMembTotal);
11419 UPDATE_MIB(o1, ipv6IfIcmpInGroupMembBadQueries,
11420 o2->ipv6IfIcmpInGroupMembBadQueries);
11421 UPDATE_MIB(o1, ipv6IfIcmpInGroupMembBadReports,
11422 o2->ipv6IfIcmpInGroupMembBadReports);
11423 UPDATE_MIB(o1, ipv6IfIcmpInGroupMembOurReports,
11424 o2->ipv6IfIcmpInGroupMembOurReports);
11425 }
11426
11427 /*
11428 * Called before the options are updated to check if this packet will
11429 * be source routed from here.
11430 * This routine assumes that the options are well formed i.e. that they
11431 * have already been checked.
11432 */
11433 boolean_t
11434 ip_source_routed(ipha_t *ipha, ip_stack_t *ipst)
11435 {
11436 ipoptp_t opts;
11437 uchar_t *opt;
11438 uint8_t optval;
11439 uint8_t optlen;
11440 ipaddr_t dst;
11441
11442 if (IS_SIMPLE_IPH(ipha)) {
11443 ip2dbg(("not source routed\n"));
11444 return (B_FALSE);
11445 }
11446 dst = ipha->ipha_dst;
11447 for (optval = ipoptp_first(&opts, ipha);
11448 optval != IPOPT_EOL;
11449 optval = ipoptp_next(&opts)) {
11450 ASSERT((opts.ipoptp_flags & IPOPTP_ERROR) == 0);
11451 opt = opts.ipoptp_cur;
11452 optlen = opts.ipoptp_len;
11453 ip2dbg(("ip_source_routed: opt %d, len %d\n",
11454 optval, optlen));
11455 switch (optval) {
11456 uint32_t off;
11457 case IPOPT_SSRR:
11458 case IPOPT_LSRR:
11459 /*
11460 * If dst is one of our addresses and there are some
11461 * entries left in the source route return (true).
11462 */
11463 if (ip_type_v4(dst, ipst) != IRE_LOCAL) {
11464 ip2dbg(("ip_source_routed: not next"
11465 " source route 0x%x\n",
11466 ntohl(dst)));
11467 return (B_FALSE);
11468 }
11469 off = opt[IPOPT_OFFSET];
11470 off--;
11471 if (optlen < IP_ADDR_LEN ||
11472 off > optlen - IP_ADDR_LEN) {
11473 /* End of source route */
11474 ip1dbg(("ip_source_routed: end of SR\n"));
11475 return (B_FALSE);
11476 }
11477 return (B_TRUE);
11478 }
11479 }
11480 ip2dbg(("not source routed\n"));
11481 return (B_FALSE);
11482 }
11483
11484 /*
11485 * ip_unbind is called by the transports to remove a conn from
11486 * the fanout table.
11487 */
11488 void
11489 ip_unbind(conn_t *connp)
11490 {
11491
11492 ASSERT(!MUTEX_HELD(&connp->conn_lock));
11493
11494 if (is_system_labeled() && connp->conn_anon_port) {
11495 (void) tsol_mlp_anon(crgetzone(connp->conn_cred),
11496 connp->conn_mlp_type, connp->conn_proto,
11497 ntohs(connp->conn_lport), B_FALSE);
11498 connp->conn_anon_port = 0;
11499 }
11500 connp->conn_mlp_type = mlptSingle;
11501
11502 ipcl_hash_remove(connp);
11503 }
11504
11505 /*
11506 * Used for deciding the MSS size for the upper layer. Thus
11507 * we need to check the outbound policy values in the conn.
11508 */
11509 int
11510 conn_ipsec_length(conn_t *connp)
11511 {
11512 ipsec_latch_t *ipl;
11513
11514 ipl = connp->conn_latch;
11515 if (ipl == NULL)
11516 return (0);
11517
11518 if (connp->conn_ixa->ixa_ipsec_policy == NULL)
11519 return (0);
11520
11521 return (connp->conn_ixa->ixa_ipsec_policy->ipsp_act->ipa_ovhd);
11522 }
11523
11524 /*
11525 * Returns an estimate of the IPsec headers size. This is used if
11526 * we don't want to call into IPsec to get the exact size.
11527 */
11528 int
11529 ipsec_out_extra_length(ip_xmit_attr_t *ixa)
11530 {
11531 ipsec_action_t *a;
11532
11533 if (!(ixa->ixa_flags & IXAF_IPSEC_SECURE))
11534 return (0);
11535
11536 a = ixa->ixa_ipsec_action;
11537 if (a == NULL) {
11538 ASSERT(ixa->ixa_ipsec_policy != NULL);
11539 a = ixa->ixa_ipsec_policy->ipsp_act;
11540 }
11541 ASSERT(a != NULL);
11542
11543 return (a->ipa_ovhd);
11544 }
11545
11546 /*
11547 * If there are any source route options, return the true final
11548 * destination. Otherwise, return the destination.
11549 */
11550 ipaddr_t
11551 ip_get_dst(ipha_t *ipha)
11552 {
11553 ipoptp_t opts;
11554 uchar_t *opt;
11555 uint8_t optval;
11556 uint8_t optlen;
11557 ipaddr_t dst;
11558 uint32_t off;
11559
11560 dst = ipha->ipha_dst;
11561
11562 if (IS_SIMPLE_IPH(ipha))
11563 return (dst);
11564
11565 for (optval = ipoptp_first(&opts, ipha);
11566 optval != IPOPT_EOL;
11567 optval = ipoptp_next(&opts)) {
11568 opt = opts.ipoptp_cur;
11569 optlen = opts.ipoptp_len;
11570 ASSERT((opts.ipoptp_flags & IPOPTP_ERROR) == 0);
11571 switch (optval) {
11572 case IPOPT_SSRR:
11573 case IPOPT_LSRR:
11574 off = opt[IPOPT_OFFSET];
11575 /*
11576 * If one of the conditions is true, it means
11577 * end of options and dst already has the right
11578 * value.
11579 */
11580 if (!(optlen < IP_ADDR_LEN || off > optlen - 3)) {
11581 off = optlen - IP_ADDR_LEN;
11582 bcopy(&opt[off], &dst, IP_ADDR_LEN);
11583 }
11584 return (dst);
11585 default:
11586 break;
11587 }
11588 }
11589
11590 return (dst);
11591 }
11592
11593 /*
11594 * Outbound IP fragmentation routine.
11595 * Assumes the caller has checked whether or not fragmentation should
11596 * be allowed. Here we copy the DF bit from the header to all the generated
11597 * fragments.
11598 */
11599 int
11600 ip_fragment_v4(mblk_t *mp_orig, nce_t *nce, iaflags_t ixaflags,
11601 uint_t pkt_len, uint32_t max_frag, uint32_t xmit_hint, zoneid_t szone,
11602 zoneid_t nolzid, pfirepostfrag_t postfragfn, uintptr_t *ixa_cookie)
11603 {
11604 int i1;
11605 int hdr_len;
11606 mblk_t *hdr_mp;
11607 ipha_t *ipha;
11608 int ip_data_end;
11609 int len;
11610 mblk_t *mp = mp_orig;
11611 int offset;
11612 ill_t *ill = nce->nce_ill;
11613 ip_stack_t *ipst = ill->ill_ipst;
11614 mblk_t *carve_mp;
11615 uint32_t frag_flag;
11616 uint_t priority = mp->b_band;
11617 int error = 0;
11618
11619 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutFragReqds);
11620
11621 if (pkt_len != msgdsize(mp)) {
11622 ip0dbg(("Packet length mismatch: %d, %ld\n",
11623 pkt_len, msgdsize(mp)));
11624 freemsg(mp);
11625 return (EINVAL);
11626 }
11627
11628 if (max_frag == 0) {
11629 ip1dbg(("ip_fragment_v4: max_frag is zero. Dropping packet\n"));
11630 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutFragFails);
11631 ip_drop_output("FragFails: zero max_frag", mp, ill);
11632 freemsg(mp);
11633 return (EINVAL);
11634 }
11635
11636 ASSERT(MBLKL(mp) >= sizeof (ipha_t));
11637 ipha = (ipha_t *)mp->b_rptr;
11638 ASSERT(ntohs(ipha->ipha_length) == pkt_len);
11639 frag_flag = ntohs(ipha->ipha_fragment_offset_and_flags) & IPH_DF;
11640
11641 /*
11642 * Establish the starting offset. May not be zero if we are fragging
11643 * a fragment that is being forwarded.
11644 */
11645 offset = ntohs(ipha->ipha_fragment_offset_and_flags) & IPH_OFFSET;
11646
11647 /* TODO why is this test needed? */
11648 if (((max_frag - ntohs(ipha->ipha_length)) & ~7) < 8) {
11649 /* TODO: notify ulp somehow */
11650 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutFragFails);
11651 ip_drop_output("FragFails: bad starting offset", mp, ill);
11652 freemsg(mp);
11653 return (EINVAL);
11654 }
11655
11656 hdr_len = IPH_HDR_LENGTH(ipha);
11657 ipha->ipha_hdr_checksum = 0;
11658
11659 /*
11660 * Establish the number of bytes maximum per frag, after putting
11661 * in the header.
11662 */
11663 len = (max_frag - hdr_len) & ~7;
11664
11665 /* Get a copy of the header for the trailing frags */
11666 hdr_mp = ip_fragment_copyhdr((uchar_t *)ipha, hdr_len, offset, ipst,
11667 mp);
11668 if (hdr_mp == NULL) {
11669 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutFragFails);
11670 ip_drop_output("FragFails: no hdr_mp", mp, ill);
11671 freemsg(mp);
11672 return (ENOBUFS);
11673 }
11674
11675 /* Store the starting offset, with the MoreFrags flag. */
11676 i1 = offset | IPH_MF | frag_flag;
11677 ipha->ipha_fragment_offset_and_flags = htons((uint16_t)i1);
11678
11679 /* Establish the ending byte offset, based on the starting offset. */
11680 offset <<= 3;
11681 ip_data_end = offset + ntohs(ipha->ipha_length) - hdr_len;
11682
11683 /* Store the length of the first fragment in the IP header. */
11684 i1 = len + hdr_len;
11685 ASSERT(i1 <= IP_MAXPACKET);
11686 ipha->ipha_length = htons((uint16_t)i1);
11687
11688 /*
11689 * Compute the IP header checksum for the first frag. We have to
11690 * watch out that we stop at the end of the header.
11691 */
11692 ipha->ipha_hdr_checksum = ip_csum_hdr(ipha);
11693
11694 /*
11695 * Now carve off the first frag. Note that this will include the
11696 * original IP header.
11697 */
11698 if (!(mp = ip_carve_mp(&mp_orig, i1))) {
11699 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutFragFails);
11700 ip_drop_output("FragFails: could not carve mp", mp_orig, ill);
11701 freeb(hdr_mp);
11702 freemsg(mp_orig);
11703 return (ENOBUFS);
11704 }
11705
11706 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutFragCreates);
11707
11708 error = postfragfn(mp, nce, ixaflags, i1, xmit_hint, szone, nolzid,
11709 ixa_cookie);
11710 if (error != 0 && error != EWOULDBLOCK) {
11711 /* No point in sending the other fragments */
11712 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutFragFails);
11713 ip_drop_output("FragFails: postfragfn failed", mp_orig, ill);
11714 freeb(hdr_mp);
11715 freemsg(mp_orig);
11716 return (error);
11717 }
11718
11719 /* No need to redo state machine in loop */
11720 ixaflags &= ~IXAF_REACH_CONF;
11721
11722 /* Advance the offset to the second frag starting point. */
11723 offset += len;
11724 /*
11725 * Update hdr_len from the copied header - there might be less options
11726 * in the later fragments.
11727 */
11728 hdr_len = IPH_HDR_LENGTH(hdr_mp->b_rptr);
11729 /* Loop until done. */
11730 for (;;) {
11731 uint16_t offset_and_flags;
11732 uint16_t ip_len;
11733
11734 if (ip_data_end - offset > len) {
11735 /*
11736 * Carve off the appropriate amount from the original
11737 * datagram.
11738 */
11739 if (!(carve_mp = ip_carve_mp(&mp_orig, len))) {
11740 mp = NULL;
11741 break;
11742 }
11743 /*
11744 * More frags after this one. Get another copy
11745 * of the header.
11746 */
11747 if (carve_mp->b_datap->db_ref == 1 &&
11748 hdr_mp->b_wptr - hdr_mp->b_rptr <
11749 carve_mp->b_rptr - carve_mp->b_datap->db_base) {
11750 /* Inline IP header */
11751 carve_mp->b_rptr -= hdr_mp->b_wptr -
11752 hdr_mp->b_rptr;
11753 bcopy(hdr_mp->b_rptr, carve_mp->b_rptr,
11754 hdr_mp->b_wptr - hdr_mp->b_rptr);
11755 mp = carve_mp;
11756 } else {
11757 if (!(mp = copyb(hdr_mp))) {
11758 freemsg(carve_mp);
11759 break;
11760 }
11761 /* Get priority marking, if any. */
11762 mp->b_band = priority;
11763 mp->b_cont = carve_mp;
11764 }
11765 ipha = (ipha_t *)mp->b_rptr;
11766 offset_and_flags = IPH_MF;
11767 } else {
11768 /*
11769 * Last frag. Consume the header. Set len to
11770 * the length of this last piece.
11771 */
11772 len = ip_data_end - offset;
11773
11774 /*
11775 * Carve off the appropriate amount from the original
11776 * datagram.
11777 */
11778 if (!(carve_mp = ip_carve_mp(&mp_orig, len))) {
11779 mp = NULL;
11780 break;
11781 }
11782 if (carve_mp->b_datap->db_ref == 1 &&
11783 hdr_mp->b_wptr - hdr_mp->b_rptr <
11784 carve_mp->b_rptr - carve_mp->b_datap->db_base) {
11785 /* Inline IP header */
11786 carve_mp->b_rptr -= hdr_mp->b_wptr -
11787 hdr_mp->b_rptr;
11788 bcopy(hdr_mp->b_rptr, carve_mp->b_rptr,
11789 hdr_mp->b_wptr - hdr_mp->b_rptr);
11790 mp = carve_mp;
11791 freeb(hdr_mp);
11792 hdr_mp = mp;
11793 } else {
11794 mp = hdr_mp;
11795 /* Get priority marking, if any. */
11796 mp->b_band = priority;
11797 mp->b_cont = carve_mp;
11798 }
11799 ipha = (ipha_t *)mp->b_rptr;
11800 /* A frag of a frag might have IPH_MF non-zero */
11801 offset_and_flags =
11802 ntohs(ipha->ipha_fragment_offset_and_flags) &
11803 IPH_MF;
11804 }
11805 offset_and_flags |= (uint16_t)(offset >> 3);
11806 offset_and_flags |= (uint16_t)frag_flag;
11807 /* Store the offset and flags in the IP header. */
11808 ipha->ipha_fragment_offset_and_flags = htons(offset_and_flags);
11809
11810 /* Store the length in the IP header. */
11811 ip_len = (uint16_t)(len + hdr_len);
11812 ipha->ipha_length = htons(ip_len);
11813
11814 /*
11815 * Set the IP header checksum. Note that mp is just
11816 * the header, so this is easy to pass to ip_csum.
11817 */
11818 ipha->ipha_hdr_checksum = ip_csum_hdr(ipha);
11819
11820 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutFragCreates);
11821
11822 error = postfragfn(mp, nce, ixaflags, ip_len, xmit_hint, szone,
11823 nolzid, ixa_cookie);
11824 /* All done if we just consumed the hdr_mp. */
11825 if (mp == hdr_mp) {
11826 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutFragOKs);
11827 return (error);
11828 }
11829 if (error != 0 && error != EWOULDBLOCK) {
11830 DTRACE_PROBE2(ip__xmit__frag__fail, ill_t *, ill,
11831 mblk_t *, hdr_mp);
11832 /* No point in sending the other fragments */
11833 break;
11834 }
11835
11836 /* Otherwise, advance and loop. */
11837 offset += len;
11838 }
11839 /* Clean up following allocation failure. */
11840 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutFragFails);
11841 ip_drop_output("FragFails: loop ended", NULL, ill);
11842 if (mp != hdr_mp)
11843 freeb(hdr_mp);
11844 if (mp != mp_orig)
11845 freemsg(mp_orig);
11846 return (error);
11847 }
11848
11849 /*
11850 * Copy the header plus those options which have the copy bit set
11851 */
11852 static mblk_t *
11853 ip_fragment_copyhdr(uchar_t *rptr, int hdr_len, int offset, ip_stack_t *ipst,
11854 mblk_t *src)
11855 {
11856 mblk_t *mp;
11857 uchar_t *up;
11858
11859 /*
11860 * Quick check if we need to look for options without the copy bit
11861 * set
11862 */
11863 mp = allocb_tmpl(ipst->ips_ip_wroff_extra + hdr_len, src);
11864 if (!mp)
11865 return (mp);
11866 mp->b_rptr += ipst->ips_ip_wroff_extra;
11867 if (hdr_len == IP_SIMPLE_HDR_LENGTH || offset != 0) {
11868 bcopy(rptr, mp->b_rptr, hdr_len);
11869 mp->b_wptr += hdr_len + ipst->ips_ip_wroff_extra;
11870 return (mp);
11871 }
11872 up = mp->b_rptr;
11873 bcopy(rptr, up, IP_SIMPLE_HDR_LENGTH);
11874 up += IP_SIMPLE_HDR_LENGTH;
11875 rptr += IP_SIMPLE_HDR_LENGTH;
11876 hdr_len -= IP_SIMPLE_HDR_LENGTH;
11877 while (hdr_len > 0) {
11878 uint32_t optval;
11879 uint32_t optlen;
11880
11881 optval = *rptr;
11882 if (optval == IPOPT_EOL)
11883 break;
11884 if (optval == IPOPT_NOP)
11885 optlen = 1;
11886 else
11887 optlen = rptr[1];
11888 if (optval & IPOPT_COPY) {
11889 bcopy(rptr, up, optlen);
11890 up += optlen;
11891 }
11892 rptr += optlen;
11893 hdr_len -= optlen;
11894 }
11895 /*
11896 * Make sure that we drop an even number of words by filling
11897 * with EOL to the next word boundary.
11898 */
11899 for (hdr_len = up - (mp->b_rptr + IP_SIMPLE_HDR_LENGTH);
11900 hdr_len & 0x3; hdr_len++)
11901 *up++ = IPOPT_EOL;
11902 mp->b_wptr = up;
11903 /* Update header length */
11904 mp->b_rptr[0] = (uint8_t)((IP_VERSION << 4) | ((up - mp->b_rptr) >> 2));
11905 return (mp);
11906 }
11907
11908 /*
11909 * Update any source route, record route, or timestamp options when
11910 * sending a packet back to ourselves.
11911 * Check that we are at end of strict source route.
11912 * The options have been sanity checked by ip_output_options().
11913 */
11914 void
11915 ip_output_local_options(ipha_t *ipha, ip_stack_t *ipst)
11916 {
11917 ipoptp_t opts;
11918 uchar_t *opt;
11919 uint8_t optval;
11920 uint8_t optlen;
11921 ipaddr_t dst;
11922 uint32_t ts;
11923 timestruc_t now;
11924
11925 for (optval = ipoptp_first(&opts, ipha);
11926 optval != IPOPT_EOL;
11927 optval = ipoptp_next(&opts)) {
11928 opt = opts.ipoptp_cur;
11929 optlen = opts.ipoptp_len;
11930 ASSERT((opts.ipoptp_flags & IPOPTP_ERROR) == 0);
11931 switch (optval) {
11932 uint32_t off;
11933 case IPOPT_SSRR:
11934 case IPOPT_LSRR:
11935 off = opt[IPOPT_OFFSET];
11936 off--;
11937 if (optlen < IP_ADDR_LEN ||
11938 off > optlen - IP_ADDR_LEN) {
11939 /* End of source route */
11940 break;
11941 }
11942 /*
11943 * This will only happen if two consecutive entries
11944 * in the source route contains our address or if
11945 * it is a packet with a loose source route which
11946 * reaches us before consuming the whole source route
11947 */
11948
11949 if (optval == IPOPT_SSRR) {
11950 return;
11951 }
11952 /*
11953 * Hack: instead of dropping the packet truncate the
11954 * source route to what has been used by filling the
11955 * rest with IPOPT_NOP.
11956 */
11957 opt[IPOPT_OLEN] = (uint8_t)off;
11958 while (off < optlen) {
11959 opt[off++] = IPOPT_NOP;
11960 }
11961 break;
11962 case IPOPT_RR:
11963 off = opt[IPOPT_OFFSET];
11964 off--;
11965 if (optlen < IP_ADDR_LEN ||
11966 off > optlen - IP_ADDR_LEN) {
11967 /* No more room - ignore */
11968 ip1dbg((
11969 "ip_output_local_options: end of RR\n"));
11970 break;
11971 }
11972 dst = htonl(INADDR_LOOPBACK);
11973 bcopy(&dst, (char *)opt + off, IP_ADDR_LEN);
11974 opt[IPOPT_OFFSET] += IP_ADDR_LEN;
11975 break;
11976 case IPOPT_TS:
11977 /* Insert timestamp if there is romm */
11978 switch (opt[IPOPT_POS_OV_FLG] & 0x0F) {
11979 case IPOPT_TS_TSONLY:
11980 off = IPOPT_TS_TIMELEN;
11981 break;
11982 case IPOPT_TS_PRESPEC:
11983 case IPOPT_TS_PRESPEC_RFC791:
11984 /* Verify that the address matched */
11985 off = opt[IPOPT_OFFSET] - 1;
11986 bcopy((char *)opt + off, &dst, IP_ADDR_LEN);
11987 if (ip_type_v4(dst, ipst) != IRE_LOCAL) {
11988 /* Not for us */
11989 break;
11990 }
11991 /* FALLTHRU */
11992 case IPOPT_TS_TSANDADDR:
11993 off = IP_ADDR_LEN + IPOPT_TS_TIMELEN;
11994 break;
11995 default:
11996 /*
11997 * ip_*put_options should have already
11998 * dropped this packet.
11999 */
12000 cmn_err(CE_PANIC, "ip_output_local_options: "
12001 "unknown IT - bug in ip_output_options?\n");
12002 return; /* Keep "lint" happy */
12003 }
12004 if (opt[IPOPT_OFFSET] - 1 + off > optlen) {
12005 /* Increase overflow counter */
12006 off = (opt[IPOPT_POS_OV_FLG] >> 4) + 1;
12007 opt[IPOPT_POS_OV_FLG] = (uint8_t)
12008 (opt[IPOPT_POS_OV_FLG] & 0x0F) |
12009 (off << 4);
12010 break;
12011 }
12012 off = opt[IPOPT_OFFSET] - 1;
12013 switch (opt[IPOPT_POS_OV_FLG] & 0x0F) {
12014 case IPOPT_TS_PRESPEC:
12015 case IPOPT_TS_PRESPEC_RFC791:
12016 case IPOPT_TS_TSANDADDR:
12017 dst = htonl(INADDR_LOOPBACK);
12018 bcopy(&dst, (char *)opt + off, IP_ADDR_LEN);
12019 opt[IPOPT_OFFSET] += IP_ADDR_LEN;
12020 /* FALLTHRU */
12021 case IPOPT_TS_TSONLY:
12022 off = opt[IPOPT_OFFSET] - 1;
12023 /* Compute # of milliseconds since midnight */
12024 gethrestime(&now);
12025 ts = (now.tv_sec % (24 * 60 * 60)) * 1000 +
12026 now.tv_nsec / (NANOSEC / MILLISEC);
12027 bcopy(&ts, (char *)opt + off, IPOPT_TS_TIMELEN);
12028 opt[IPOPT_OFFSET] += IPOPT_TS_TIMELEN;
12029 break;
12030 }
12031 break;
12032 }
12033 }
12034 }
12035
12036 /*
12037 * Prepend an M_DATA fastpath header, and if none present prepend a
12038 * DL_UNITDATA_REQ. Frees the mblk on failure.
12039 *
12040 * nce_dlur_mp and nce_fp_mp can not disappear once they have been set.
12041 * If there is a change to them, the nce will be deleted (condemned) and
12042 * a new nce_t will be created when packets are sent. Thus we need no locks
12043 * to access those fields.
12044 *
12045 * We preserve b_band to support IPQoS. If a DL_UNITDATA_REQ is prepended
12046 * we place b_band in dl_priority.dl_max.
12047 */
12048 static mblk_t *
12049 ip_xmit_attach_llhdr(mblk_t *mp, nce_t *nce)
12050 {
12051 uint_t hlen;
12052 mblk_t *mp1;
12053 uint_t priority;
12054 uchar_t *rptr;
12055
12056 rptr = mp->b_rptr;
12057
12058 ASSERT(DB_TYPE(mp) == M_DATA);
12059 priority = mp->b_band;
12060
12061 ASSERT(nce != NULL);
12062 if ((mp1 = nce->nce_fp_mp) != NULL) {
12063 hlen = MBLKL(mp1);
12064 /*
12065 * Check if we have enough room to prepend fastpath
12066 * header
12067 */
12068 if (hlen != 0 && (rptr - mp->b_datap->db_base) >= hlen) {
12069 rptr -= hlen;
12070 bcopy(mp1->b_rptr, rptr, hlen);
12071 /*
12072 * Set the b_rptr to the start of the link layer
12073 * header
12074 */
12075 mp->b_rptr = rptr;
12076 return (mp);
12077 }
12078 mp1 = copyb(mp1);
12079 if (mp1 == NULL) {
12080 ill_t *ill = nce->nce_ill;
12081
12082 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutDiscards);
12083 ip_drop_output("ipIfStatsOutDiscards", mp, ill);
12084 freemsg(mp);
12085 return (NULL);
12086 }
12087 mp1->b_band = priority;
12088 mp1->b_cont = mp;
12089 DB_CKSUMSTART(mp1) = DB_CKSUMSTART(mp);
12090 DB_CKSUMSTUFF(mp1) = DB_CKSUMSTUFF(mp);
12091 DB_CKSUMEND(mp1) = DB_CKSUMEND(mp);
12092 DB_CKSUMFLAGS(mp1) = DB_CKSUMFLAGS(mp);
12093 DB_LSOMSS(mp1) = DB_LSOMSS(mp);
12094 DTRACE_PROBE1(ip__xmit__copyb, (mblk_t *), mp1);
12095 /*
12096 * XXX disable ICK_VALID and compute checksum
12097 * here; can happen if nce_fp_mp changes and
12098 * it can't be copied now due to insufficient
12099 * space. (unlikely, fp mp can change, but it
12100 * does not increase in length)
12101 */
12102 return (mp1);
12103 }
12104 mp1 = copyb(nce->nce_dlur_mp);
12105
12106 if (mp1 == NULL) {
12107 ill_t *ill = nce->nce_ill;
12108
12109 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutDiscards);
12110 ip_drop_output("ipIfStatsOutDiscards", mp, ill);
12111 freemsg(mp);
12112 return (NULL);
12113 }
12114 mp1->b_cont = mp;
12115 if (priority != 0) {
12116 mp1->b_band = priority;
12117 ((dl_unitdata_req_t *)(mp1->b_rptr))->dl_priority.dl_max =
12118 priority;
12119 }
12120 return (mp1);
12121 #undef rptr
12122 }
12123
12124 /*
12125 * Finish the outbound IPsec processing. This function is called from
12126 * ipsec_out_process() if the IPsec packet was processed
12127 * synchronously, or from {ah,esp}_kcf_callback_outbound() if it was processed
12128 * asynchronously.
12129 *
12130 * This is common to IPv4 and IPv6.
12131 */
12132 int
12133 ip_output_post_ipsec(mblk_t *mp, ip_xmit_attr_t *ixa)
12134 {
12135 iaflags_t ixaflags = ixa->ixa_flags;
12136 uint_t pktlen;
12137
12138
12139 /* AH/ESP don't update ixa_pktlen when they modify the packet */
12140 if (ixaflags & IXAF_IS_IPV4) {
12141 ipha_t *ipha = (ipha_t *)mp->b_rptr;
12142
12143 ASSERT(IPH_HDR_VERSION(ipha) == IPV4_VERSION);
12144 pktlen = ntohs(ipha->ipha_length);
12145 } else {
12146 ip6_t *ip6h = (ip6_t *)mp->b_rptr;
12147
12148 ASSERT(IPH_HDR_VERSION(mp->b_rptr) == IPV6_VERSION);
12149 pktlen = ntohs(ip6h->ip6_plen) + IPV6_HDR_LEN;
12150 }
12151
12152 /*
12153 * We release any hard reference on the SAs here to make
12154 * sure the SAs can be garbage collected. ipsr_sa has a soft reference
12155 * on the SAs.
12156 * If in the future we want the hard latching of the SAs in the
12157 * ip_xmit_attr_t then we should remove this.
12158 */
12159 if (ixa->ixa_ipsec_esp_sa != NULL) {
12160 IPSA_REFRELE(ixa->ixa_ipsec_esp_sa);
12161 ixa->ixa_ipsec_esp_sa = NULL;
12162 }
12163 if (ixa->ixa_ipsec_ah_sa != NULL) {
12164 IPSA_REFRELE(ixa->ixa_ipsec_ah_sa);
12165 ixa->ixa_ipsec_ah_sa = NULL;
12166 }
12167
12168 /* Do we need to fragment? */
12169 if ((ixa->ixa_flags & IXAF_IPV6_ADD_FRAGHDR) ||
12170 pktlen > ixa->ixa_fragsize) {
12171 if (ixaflags & IXAF_IS_IPV4) {
12172 ASSERT(!(ixa->ixa_flags & IXAF_IPV6_ADD_FRAGHDR));
12173 /*
12174 * We check for the DF case in ipsec_out_process
12175 * hence this only handles the non-DF case.
12176 */
12177 return (ip_fragment_v4(mp, ixa->ixa_nce, ixa->ixa_flags,
12178 pktlen, ixa->ixa_fragsize,
12179 ixa->ixa_xmit_hint, ixa->ixa_zoneid,
12180 ixa->ixa_no_loop_zoneid, ixa->ixa_postfragfn,
12181 &ixa->ixa_cookie));
12182 } else {
12183 mp = ip_fraghdr_add_v6(mp, ixa->ixa_ident, ixa);
12184 if (mp == NULL) {
12185 /* MIB and ip_drop_output already done */
12186 return (ENOMEM);
12187 }
12188 pktlen += sizeof (ip6_frag_t);
12189 if (pktlen > ixa->ixa_fragsize) {
12190 return (ip_fragment_v6(mp, ixa->ixa_nce,
12191 ixa->ixa_flags, pktlen,
12192 ixa->ixa_fragsize, ixa->ixa_xmit_hint,
12193 ixa->ixa_zoneid, ixa->ixa_no_loop_zoneid,
12194 ixa->ixa_postfragfn, &ixa->ixa_cookie));
12195 }
12196 }
12197 }
12198 return ((ixa->ixa_postfragfn)(mp, ixa->ixa_nce, ixa->ixa_flags,
12199 pktlen, ixa->ixa_xmit_hint, ixa->ixa_zoneid,
12200 ixa->ixa_no_loop_zoneid, NULL));
12201 }
12202
12203 /*
12204 * Finish the inbound IPsec processing. This function is called from
12205 * ipsec_out_process() if the IPsec packet was processed
12206 * synchronously, or from {ah,esp}_kcf_callback_outbound() if it was processed
12207 * asynchronously.
12208 *
12209 * This is common to IPv4 and IPv6.
12210 */
12211 void
12212 ip_input_post_ipsec(mblk_t *mp, ip_recv_attr_t *ira)
12213 {
12214 iaflags_t iraflags = ira->ira_flags;
12215
12216 /* Length might have changed */
12217 if (iraflags & IRAF_IS_IPV4) {
12218 ipha_t *ipha = (ipha_t *)mp->b_rptr;
12219
12220 ASSERT(IPH_HDR_VERSION(ipha) == IPV4_VERSION);
12221 ira->ira_pktlen = ntohs(ipha->ipha_length);
12222 ira->ira_ip_hdr_length = IPH_HDR_LENGTH(ipha);
12223 ira->ira_protocol = ipha->ipha_protocol;
12224
12225 ip_fanout_v4(mp, ipha, ira);
12226 } else {
12227 ip6_t *ip6h = (ip6_t *)mp->b_rptr;
12228 uint8_t *nexthdrp;
12229
12230 ASSERT(IPH_HDR_VERSION(mp->b_rptr) == IPV6_VERSION);
12231 ira->ira_pktlen = ntohs(ip6h->ip6_plen) + IPV6_HDR_LEN;
12232 if (!ip_hdr_length_nexthdr_v6(mp, ip6h, &ira->ira_ip_hdr_length,
12233 &nexthdrp)) {
12234 /* Malformed packet */
12235 BUMP_MIB(ira->ira_ill->ill_ip_mib, ipIfStatsInDiscards);
12236 ip_drop_input("ipIfStatsInDiscards", mp, ira->ira_ill);
12237 freemsg(mp);
12238 return;
12239 }
12240 ira->ira_protocol = *nexthdrp;
12241 ip_fanout_v6(mp, ip6h, ira);
12242 }
12243 }
12244
12245 /*
12246 * Select which AH & ESP SA's to use (if any) for the outbound packet.
12247 *
12248 * If this function returns B_TRUE, the requested SA's have been filled
12249 * into the ixa_ipsec_*_sa pointers.
12250 *
12251 * If the function returns B_FALSE, the packet has been "consumed", most
12252 * likely by an ACQUIRE sent up via PF_KEY to a key management daemon.
12253 *
12254 * The SA references created by the protocol-specific "select"
12255 * function will be released in ip_output_post_ipsec.
12256 */
12257 static boolean_t
12258 ipsec_out_select_sa(mblk_t *mp, ip_xmit_attr_t *ixa)
12259 {
12260 boolean_t need_ah_acquire = B_FALSE, need_esp_acquire = B_FALSE;
12261 ipsec_policy_t *pp;
12262 ipsec_action_t *ap;
12263
12264 ASSERT(ixa->ixa_flags & IXAF_IPSEC_SECURE);
12265 ASSERT((ixa->ixa_ipsec_policy != NULL) ||
12266 (ixa->ixa_ipsec_action != NULL));
12267
12268 ap = ixa->ixa_ipsec_action;
12269 if (ap == NULL) {
12270 pp = ixa->ixa_ipsec_policy;
12271 ASSERT(pp != NULL);
12272 ap = pp->ipsp_act;
12273 ASSERT(ap != NULL);
12274 }
12275
12276 /*
12277 * We have an action. now, let's select SA's.
12278 * A side effect of setting ixa_ipsec_*_sa is that it will
12279 * be cached in the conn_t.
12280 */
12281 if (ap->ipa_want_esp) {
12282 if (ixa->ixa_ipsec_esp_sa == NULL) {
12283 need_esp_acquire = !ipsec_outbound_sa(mp, ixa,
12284 IPPROTO_ESP);
12285 }
12286 ASSERT(need_esp_acquire || ixa->ixa_ipsec_esp_sa != NULL);
12287 }
12288
12289 if (ap->ipa_want_ah) {
12290 if (ixa->ixa_ipsec_ah_sa == NULL) {
12291 need_ah_acquire = !ipsec_outbound_sa(mp, ixa,
12292 IPPROTO_AH);
12293 }
12294 ASSERT(need_ah_acquire || ixa->ixa_ipsec_ah_sa != NULL);
12295 /*
12296 * The ESP and AH processing order needs to be preserved
12297 * when both protocols are required (ESP should be applied
12298 * before AH for an outbound packet). Force an ESP ACQUIRE
12299 * when both ESP and AH are required, and an AH ACQUIRE
12300 * is needed.
12301 */
12302 if (ap->ipa_want_esp && need_ah_acquire)
12303 need_esp_acquire = B_TRUE;
12304 }
12305
12306 /*
12307 * Send an ACQUIRE (extended, regular, or both) if we need one.
12308 * Release SAs that got referenced, but will not be used until we
12309 * acquire _all_ of the SAs we need.
12310 */
12311 if (need_ah_acquire || need_esp_acquire) {
12312 if (ixa->ixa_ipsec_ah_sa != NULL) {
12313 IPSA_REFRELE(ixa->ixa_ipsec_ah_sa);
12314 ixa->ixa_ipsec_ah_sa = NULL;
12315 }
12316 if (ixa->ixa_ipsec_esp_sa != NULL) {
12317 IPSA_REFRELE(ixa->ixa_ipsec_esp_sa);
12318 ixa->ixa_ipsec_esp_sa = NULL;
12319 }
12320
12321 sadb_acquire(mp, ixa, need_ah_acquire, need_esp_acquire);
12322 return (B_FALSE);
12323 }
12324
12325 return (B_TRUE);
12326 }
12327
12328 /*
12329 * Handle IPsec output processing.
12330 * This function is only entered once for a given packet.
12331 * We try to do things synchronously, but if we need to have user-level
12332 * set up SAs, or ESP or AH uses asynchronous kEF, then the operation
12333 * will be completed
12334 * - when the SAs are added in esp_add_sa_finish/ah_add_sa_finish
12335 * - when asynchronous ESP is done it will do AH
12336 *
12337 * In all cases we come back in ip_output_post_ipsec() to fragment and
12338 * send out the packet.
12339 */
12340 int
12341 ipsec_out_process(mblk_t *mp, ip_xmit_attr_t *ixa)
12342 {
12343 ill_t *ill = ixa->ixa_nce->nce_ill;
12344 ip_stack_t *ipst = ixa->ixa_ipst;
12345 ipsec_stack_t *ipss;
12346 ipsec_policy_t *pp;
12347 ipsec_action_t *ap;
12348
12349 ASSERT(ixa->ixa_flags & IXAF_IPSEC_SECURE);
12350
12351 ASSERT((ixa->ixa_ipsec_policy != NULL) ||
12352 (ixa->ixa_ipsec_action != NULL));
12353
12354 ipss = ipst->ips_netstack->netstack_ipsec;
12355 if (!ipsec_loaded(ipss)) {
12356 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutDiscards);
12357 ip_drop_packet(mp, B_TRUE, ill,
12358 DROPPER(ipss, ipds_ip_ipsec_not_loaded),
12359 &ipss->ipsec_dropper);
12360 return (ENOTSUP);
12361 }
12362
12363 ap = ixa->ixa_ipsec_action;
12364 if (ap == NULL) {
12365 pp = ixa->ixa_ipsec_policy;
12366 ASSERT(pp != NULL);
12367 ap = pp->ipsp_act;
12368 ASSERT(ap != NULL);
12369 }
12370
12371 /* Handle explicit drop action and bypass. */
12372 switch (ap->ipa_act.ipa_type) {
12373 case IPSEC_ACT_DISCARD:
12374 case IPSEC_ACT_REJECT:
12375 ip_drop_packet(mp, B_FALSE, ill,
12376 DROPPER(ipss, ipds_spd_explicit), &ipss->ipsec_spd_dropper);
12377 return (EHOSTUNREACH); /* IPsec policy failure */
12378 case IPSEC_ACT_BYPASS:
12379 return (ip_output_post_ipsec(mp, ixa));
12380 }
12381
12382 /*
12383 * The order of processing is first insert a IP header if needed.
12384 * Then insert the ESP header and then the AH header.
12385 */
12386 if ((ixa->ixa_flags & IXAF_IS_IPV4) && ap->ipa_want_se) {
12387 /*
12388 * First get the outer IP header before sending
12389 * it to ESP.
12390 */
12391 ipha_t *oipha, *iipha;
12392 mblk_t *outer_mp, *inner_mp;
12393
12394 if ((outer_mp = allocb(sizeof (ipha_t), BPRI_HI)) == NULL) {
12395 (void) mi_strlog(ill->ill_rq, 0,
12396 SL_ERROR|SL_TRACE|SL_CONSOLE,
12397 "ipsec_out_process: "
12398 "Self-Encapsulation failed: Out of memory\n");
12399 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutDiscards);
12400 ip_drop_output("ipIfStatsOutDiscards", mp, ill);
12401 freemsg(mp);
12402 return (ENOBUFS);
12403 }
12404 inner_mp = mp;
12405 ASSERT(inner_mp->b_datap->db_type == M_DATA);
12406 oipha = (ipha_t *)outer_mp->b_rptr;
12407 iipha = (ipha_t *)inner_mp->b_rptr;
12408 *oipha = *iipha;
12409 outer_mp->b_wptr += sizeof (ipha_t);
12410 oipha->ipha_length = htons(ntohs(iipha->ipha_length) +
12411 sizeof (ipha_t));
12412 oipha->ipha_protocol = IPPROTO_ENCAP;
12413 oipha->ipha_version_and_hdr_length =
12414 IP_SIMPLE_HDR_VERSION;
12415 oipha->ipha_hdr_checksum = 0;
12416 oipha->ipha_hdr_checksum = ip_csum_hdr(oipha);
12417 outer_mp->b_cont = inner_mp;
12418 mp = outer_mp;
12419
12420 ixa->ixa_flags |= IXAF_IPSEC_TUNNEL;
12421 }
12422
12423 /* If we need to wait for a SA then we can't return any errno */
12424 if (((ap->ipa_want_ah && (ixa->ixa_ipsec_ah_sa == NULL)) ||
12425 (ap->ipa_want_esp && (ixa->ixa_ipsec_esp_sa == NULL))) &&
12426 !ipsec_out_select_sa(mp, ixa))
12427 return (0);
12428
12429 /*
12430 * By now, we know what SA's to use. Toss over to ESP & AH
12431 * to do the heavy lifting.
12432 */
12433 if (ap->ipa_want_esp) {
12434 ASSERT(ixa->ixa_ipsec_esp_sa != NULL);
12435
12436 mp = ixa->ixa_ipsec_esp_sa->ipsa_output_func(mp, ixa);
12437 if (mp == NULL) {
12438 /*
12439 * Either it failed or is pending. In the former case
12440 * ipIfStatsInDiscards was increased.
12441 */
12442 return (0);
12443 }
12444 }
12445
12446 if (ap->ipa_want_ah) {
12447 ASSERT(ixa->ixa_ipsec_ah_sa != NULL);
12448
12449 mp = ixa->ixa_ipsec_ah_sa->ipsa_output_func(mp, ixa);
12450 if (mp == NULL) {
12451 /*
12452 * Either it failed or is pending. In the former case
12453 * ipIfStatsInDiscards was increased.
12454 */
12455 return (0);
12456 }
12457 }
12458 /*
12459 * We are done with IPsec processing. Send it over
12460 * the wire.
12461 */
12462 return (ip_output_post_ipsec(mp, ixa));
12463 }
12464
12465 /*
12466 * ioctls that go through a down/up sequence may need to wait for the down
12467 * to complete. This involves waiting for the ire and ipif refcnts to go down
12468 * to zero. Subsequently the ioctl is restarted from ipif_ill_refrele_tail.
12469 */
12470 /* ARGSUSED */
12471 void
12472 ip_reprocess_ioctl(ipsq_t *ipsq, queue_t *q, mblk_t *mp, void *dummy_arg)
12473 {
12474 struct iocblk *iocp;
12475 mblk_t *mp1;
12476 ip_ioctl_cmd_t *ipip;
12477 int err;
12478 sin_t *sin;
12479 struct lifreq *lifr;
12480 struct ifreq *ifr;
12481
12482 iocp = (struct iocblk *)mp->b_rptr;
12483 ASSERT(ipsq != NULL);
12484 /* Existence of mp1 verified in ip_wput_nondata */
12485 mp1 = mp->b_cont->b_cont;
12486 ipip = ip_sioctl_lookup(iocp->ioc_cmd);
12487 if (ipip->ipi_cmd == SIOCSLIFNAME || ipip->ipi_cmd == IF_UNITSEL) {
12488 /*
12489 * Special case where ipx_current_ipif is not set:
12490 * ill_phyint_reinit merged the v4 and v6 into a single ipsq.
12491 * We are here as were not able to complete the operation in
12492 * ipif_set_values because we could not become exclusive on
12493 * the new ipsq.
12494 */
12495 ill_t *ill = q->q_ptr;
12496 ipsq_current_start(ipsq, ill->ill_ipif, ipip->ipi_cmd);
12497 }
12498 ASSERT(ipsq->ipsq_xop->ipx_current_ipif != NULL);
12499
12500 if (ipip->ipi_cmd_type == IF_CMD) {
12501 /* This a old style SIOC[GS]IF* command */
12502 ifr = (struct ifreq *)mp1->b_rptr;
12503 sin = (sin_t *)&ifr->ifr_addr;
12504 } else if (ipip->ipi_cmd_type == LIF_CMD) {
12505 /* This a new style SIOC[GS]LIF* command */
12506 lifr = (struct lifreq *)mp1->b_rptr;
12507 sin = (sin_t *)&lifr->lifr_addr;
12508 } else {
12509 sin = NULL;
12510 }
12511
12512 err = (*ipip->ipi_func_restart)(ipsq->ipsq_xop->ipx_current_ipif, sin,
12513 q, mp, ipip, mp1->b_rptr);
12514
12515 DTRACE_PROBE4(ipif__ioctl, char *, "ip_reprocess_ioctl finish",
12516 int, ipip->ipi_cmd,
12517 ill_t *, ipsq->ipsq_xop->ipx_current_ipif->ipif_ill,
12518 ipif_t *, ipsq->ipsq_xop->ipx_current_ipif);
12519
12520 ip_ioctl_finish(q, mp, err, IPI2MODE(ipip), ipsq);
12521 }
12522
12523 /*
12524 * ioctl processing
12525 *
12526 * ioctl processing starts with ip_sioctl_copyin_setup(), which looks up
12527 * the ioctl command in the ioctl tables, determines the copyin data size
12528 * from the ipi_copyin_size field, and does an mi_copyin() of that size.
12529 *
12530 * ioctl processing then continues when the M_IOCDATA makes its way down to
12531 * ip_wput_nondata(). The ioctl is looked up again in the ioctl table, its
12532 * associated 'conn' is refheld till the end of the ioctl and the general
12533 * ioctl processing function ip_process_ioctl() is called to extract the
12534 * arguments and process the ioctl. To simplify extraction, ioctl commands
12535 * are "typed" based on the arguments they take (e.g., LIF_CMD which takes a
12536 * `struct lifreq'), and a common extract function (e.g., ip_extract_lifreq())
12537 * is used to extract the ioctl's arguments.
12538 *
12539 * ip_process_ioctl determines if the ioctl needs to be serialized, and if
12540 * so goes thru the serialization primitive ipsq_try_enter. Then the
12541 * appropriate function to handle the ioctl is called based on the entry in
12542 * the ioctl table. ioctl completion is encapsulated in ip_ioctl_finish
12543 * which also refreleases the 'conn' that was refheld at the start of the
12544 * ioctl. Finally ipsq_exit is called if needed to exit the ipsq.
12545 *
12546 * Many exclusive ioctls go thru an internal down up sequence as part of
12547 * the operation. For example an attempt to change the IP address of an
12548 * ipif entails ipif_down, set address, ipif_up. Bringing down the interface
12549 * does all the cleanup such as deleting all ires that use this address.
12550 * Then we need to wait till all references to the interface go away.
12551 */
12552 void
12553 ip_process_ioctl(ipsq_t *ipsq, queue_t *q, mblk_t *mp, void *arg)
12554 {
12555 struct iocblk *iocp = (struct iocblk *)mp->b_rptr;
12556 ip_ioctl_cmd_t *ipip = arg;
12557 ip_extract_func_t *extract_funcp;
12558 cmd_info_t ci;
12559 int err;
12560 boolean_t entered_ipsq = B_FALSE;
12561
12562 ip3dbg(("ip_process_ioctl: ioctl %X\n", iocp->ioc_cmd));
12563
12564 if (ipip == NULL)
12565 ipip = ip_sioctl_lookup(iocp->ioc_cmd);
12566
12567 /*
12568 * SIOCLIFADDIF needs to go thru a special path since the
12569 * ill may not exist yet. This happens in the case of lo0
12570 * which is created using this ioctl.
12571 */
12572 if (ipip->ipi_cmd == SIOCLIFADDIF) {
12573 err = ip_sioctl_addif(NULL, NULL, q, mp, NULL, NULL);
12574 DTRACE_PROBE4(ipif__ioctl, char *, "ip_process_ioctl finish",
12575 int, ipip->ipi_cmd, ill_t *, NULL, ipif_t *, NULL);
12576 ip_ioctl_finish(q, mp, err, IPI2MODE(ipip), NULL);
12577 return;
12578 }
12579
12580 ci.ci_ipif = NULL;
12581 switch (ipip->ipi_cmd_type) {
12582 case MISC_CMD:
12583 case MSFILT_CMD:
12584 /*
12585 * All MISC_CMD ioctls come in here -- e.g. SIOCGLIFCONF.
12586 */
12587 if (ipip->ipi_cmd == IF_UNITSEL) {
12588 /* ioctl comes down the ill */
12589 ci.ci_ipif = ((ill_t *)q->q_ptr)->ill_ipif;
12590 ipif_refhold(ci.ci_ipif);
12591 }
12592 err = 0;
12593 ci.ci_sin = NULL;
12594 ci.ci_sin6 = NULL;
12595 ci.ci_lifr = NULL;
12596 extract_funcp = NULL;
12597 break;
12598
12599 case IF_CMD:
12600 case LIF_CMD:
12601 extract_funcp = ip_extract_lifreq;
12602 break;
12603
12604 case ARP_CMD:
12605 case XARP_CMD:
12606 extract_funcp = ip_extract_arpreq;
12607 break;
12608
12609 default:
12610 ASSERT(0);
12611 }
12612
12613 if (extract_funcp != NULL) {
12614 err = (*extract_funcp)(q, mp, ipip, &ci);
12615 if (err != 0) {
12616 DTRACE_PROBE4(ipif__ioctl,
12617 char *, "ip_process_ioctl finish err",
12618 int, ipip->ipi_cmd, ill_t *, NULL, ipif_t *, NULL);
12619 ip_ioctl_finish(q, mp, err, IPI2MODE(ipip), NULL);
12620 return;
12621 }
12622
12623 /*
12624 * All of the extraction functions return a refheld ipif.
12625 */
12626 ASSERT(ci.ci_ipif != NULL);
12627 }
12628
12629 if (!(ipip->ipi_flags & IPI_WR)) {
12630 /*
12631 * A return value of EINPROGRESS means the ioctl is
12632 * either queued and waiting for some reason or has
12633 * already completed.
12634 */
12635 err = (*ipip->ipi_func)(ci.ci_ipif, ci.ci_sin, q, mp, ipip,
12636 ci.ci_lifr);
12637 if (ci.ci_ipif != NULL) {
12638 DTRACE_PROBE4(ipif__ioctl,
12639 char *, "ip_process_ioctl finish RD",
12640 int, ipip->ipi_cmd, ill_t *, ci.ci_ipif->ipif_ill,
12641 ipif_t *, ci.ci_ipif);
12642 ipif_refrele(ci.ci_ipif);
12643 } else {
12644 DTRACE_PROBE4(ipif__ioctl,
12645 char *, "ip_process_ioctl finish RD",
12646 int, ipip->ipi_cmd, ill_t *, NULL, ipif_t *, NULL);
12647 }
12648 ip_ioctl_finish(q, mp, err, IPI2MODE(ipip), NULL);
12649 return;
12650 }
12651
12652 ASSERT(ci.ci_ipif != NULL);
12653
12654 /*
12655 * If ipsq is non-NULL, we are already being called exclusively
12656 */
12657 ASSERT(ipsq == NULL || IAM_WRITER_IPSQ(ipsq));
12658 if (ipsq == NULL) {
12659 ipsq = ipsq_try_enter(ci.ci_ipif, NULL, q, mp, ip_process_ioctl,
12660 NEW_OP, B_TRUE);
12661 if (ipsq == NULL) {
12662 ipif_refrele(ci.ci_ipif);
12663 return;
12664 }
12665 entered_ipsq = B_TRUE;
12666 }
12667 /*
12668 * Release the ipif so that ipif_down and friends that wait for
12669 * references to go away are not misled about the current ipif_refcnt
12670 * values. We are writer so we can access the ipif even after releasing
12671 * the ipif.
12672 */
12673 ipif_refrele(ci.ci_ipif);
12674
12675 ipsq_current_start(ipsq, ci.ci_ipif, ipip->ipi_cmd);
12676
12677 /*
12678 * A return value of EINPROGRESS means the ioctl is
12679 * either queued and waiting for some reason or has
12680 * already completed.
12681 */
12682 err = (*ipip->ipi_func)(ci.ci_ipif, ci.ci_sin, q, mp, ipip, ci.ci_lifr);
12683
12684 DTRACE_PROBE4(ipif__ioctl, char *, "ip_process_ioctl finish WR",
12685 int, ipip->ipi_cmd,
12686 ill_t *, ci.ci_ipif == NULL ? NULL : ci.ci_ipif->ipif_ill,
12687 ipif_t *, ci.ci_ipif);
12688 ip_ioctl_finish(q, mp, err, IPI2MODE(ipip), ipsq);
12689
12690 if (entered_ipsq)
12691 ipsq_exit(ipsq);
12692 }
12693
12694 /*
12695 * Complete the ioctl. Typically ioctls use the mi package and need to
12696 * do mi_copyout/mi_copy_done.
12697 */
12698 void
12699 ip_ioctl_finish(queue_t *q, mblk_t *mp, int err, int mode, ipsq_t *ipsq)
12700 {
12701 conn_t *connp = NULL;
12702
12703 if (err == EINPROGRESS)
12704 return;
12705
12706 if (CONN_Q(q)) {
12707 connp = Q_TO_CONN(q);
12708 ASSERT(connp->conn_ref >= 2);
12709 }
12710
12711 switch (mode) {
12712 case COPYOUT:
12713 if (err == 0)
12714 mi_copyout(q, mp);
12715 else
12716 mi_copy_done(q, mp, err);
12717 break;
12718
12719 case NO_COPYOUT:
12720 mi_copy_done(q, mp, err);
12721 break;
12722
12723 default:
12724 ASSERT(mode == CONN_CLOSE); /* aborted through CONN_CLOSE */
12725 break;
12726 }
12727
12728 /*
12729 * The conn refhold and ioctlref placed on the conn at the start of the
12730 * ioctl are released here.
12731 */
12732 if (connp != NULL) {
12733 CONN_DEC_IOCTLREF(connp);
12734 CONN_OPER_PENDING_DONE(connp);
12735 }
12736
12737 if (ipsq != NULL)
12738 ipsq_current_finish(ipsq);
12739 }
12740
12741 /* Handles all non data messages */
12742 void
12743 ip_wput_nondata(queue_t *q, mblk_t *mp)
12744 {
12745 mblk_t *mp1;
12746 struct iocblk *iocp;
12747 ip_ioctl_cmd_t *ipip;
12748 conn_t *connp;
12749 cred_t *cr;
12750 char *proto_str;
12751
12752 if (CONN_Q(q))
12753 connp = Q_TO_CONN(q);
12754 else
12755 connp = NULL;
12756
12757 switch (DB_TYPE(mp)) {
12758 case M_IOCTL:
12759 /*
12760 * IOCTL processing begins in ip_sioctl_copyin_setup which
12761 * will arrange to copy in associated control structures.
12762 */
12763 ip_sioctl_copyin_setup(q, mp);
12764 return;
12765 case M_IOCDATA:
12766 /*
12767 * Ensure that this is associated with one of our trans-
12768 * parent ioctls. If it's not ours, discard it if we're
12769 * running as a driver, or pass it on if we're a module.
12770 */
12771 iocp = (struct iocblk *)mp->b_rptr;
12772 ipip = ip_sioctl_lookup(iocp->ioc_cmd);
12773 if (ipip == NULL) {
12774 if (q->q_next == NULL) {
12775 goto nak;
12776 } else {
12777 putnext(q, mp);
12778 }
12779 return;
12780 }
12781 if ((q->q_next != NULL) && !(ipip->ipi_flags & IPI_MODOK)) {
12782 /*
12783 * The ioctl is one we recognise, but is not consumed
12784 * by IP as a module and we are a module, so we drop
12785 */
12786 goto nak;
12787 }
12788
12789 /* IOCTL continuation following copyin or copyout. */
12790 if (mi_copy_state(q, mp, NULL) == -1) {
12791 /*
12792 * The copy operation failed. mi_copy_state already
12793 * cleaned up, so we're out of here.
12794 */
12795 return;
12796 }
12797 /*
12798 * If we just completed a copy in, we become writer and
12799 * continue processing in ip_sioctl_copyin_done. If it
12800 * was a copy out, we call mi_copyout again. If there is
12801 * nothing more to copy out, it will complete the IOCTL.
12802 */
12803 if (MI_COPY_DIRECTION(mp) == MI_COPY_IN) {
12804 if (!(mp1 = mp->b_cont) || !(mp1 = mp1->b_cont)) {
12805 mi_copy_done(q, mp, EPROTO);
12806 return;
12807 }
12808 /*
12809 * Check for cases that need more copying. A return
12810 * value of 0 means a second copyin has been started,
12811 * so we return; a return value of 1 means no more
12812 * copying is needed, so we continue.
12813 */
12814 if (ipip->ipi_cmd_type == MSFILT_CMD &&
12815 MI_COPY_COUNT(mp) == 1) {
12816 if (ip_copyin_msfilter(q, mp) == 0)
12817 return;
12818 }
12819 /*
12820 * Refhold the conn, till the ioctl completes. This is
12821 * needed in case the ioctl ends up in the pending mp
12822 * list. Every mp in the ipx_pending_mp list must have
12823 * a refhold on the conn to resume processing. The
12824 * refhold is released when the ioctl completes
12825 * (whether normally or abnormally). An ioctlref is also
12826 * placed on the conn to prevent TCP from removing the
12827 * queue needed to send the ioctl reply back.
12828 * In all cases ip_ioctl_finish is called to finish
12829 * the ioctl and release the refholds.
12830 */
12831 if (connp != NULL) {
12832 /* This is not a reentry */
12833 CONN_INC_REF(connp);
12834 CONN_INC_IOCTLREF(connp);
12835 } else {
12836 if (!(ipip->ipi_flags & IPI_MODOK)) {
12837 mi_copy_done(q, mp, EINVAL);
12838 return;
12839 }
12840 }
12841
12842 ip_process_ioctl(NULL, q, mp, ipip);
12843
12844 } else {
12845 mi_copyout(q, mp);
12846 }
12847 return;
12848
12849 case M_IOCNAK:
12850 /*
12851 * The only way we could get here is if a resolver didn't like
12852 * an IOCTL we sent it. This shouldn't happen.
12853 */
12854 (void) mi_strlog(q, 1, SL_ERROR|SL_TRACE,
12855 "ip_wput_nondata: unexpected M_IOCNAK, ioc_cmd 0x%x",
12856 ((struct iocblk *)mp->b_rptr)->ioc_cmd);
12857 freemsg(mp);
12858 return;
12859 case M_IOCACK:
12860 /* /dev/ip shouldn't see this */
12861 goto nak;
12862 case M_FLUSH:
12863 if (*mp->b_rptr & FLUSHW)
12864 flushq(q, FLUSHALL);
12865 if (q->q_next) {
12866 putnext(q, mp);
12867 return;
12868 }
12869 if (*mp->b_rptr & FLUSHR) {
12870 *mp->b_rptr &= ~FLUSHW;
12871 qreply(q, mp);
12872 return;
12873 }
12874 freemsg(mp);
12875 return;
12876 case M_CTL:
12877 break;
12878 case M_PROTO:
12879 case M_PCPROTO:
12880 /*
12881 * The only PROTO messages we expect are SNMP-related.
12882 */
12883 switch (((union T_primitives *)mp->b_rptr)->type) {
12884 case T_SVR4_OPTMGMT_REQ:
12885 ip2dbg(("ip_wput_nondata: T_SVR4_OPTMGMT_REQ "
12886 "flags %x\n",
12887 ((struct T_optmgmt_req *)mp->b_rptr)->MGMT_flags));
12888
12889 if (connp == NULL) {
12890 proto_str = "T_SVR4_OPTMGMT_REQ";
12891 goto protonak;
12892 }
12893
12894 /*
12895 * All Solaris components should pass a db_credp
12896 * for this TPI message, hence we ASSERT.
12897 * But in case there is some other M_PROTO that looks
12898 * like a TPI message sent by some other kernel
12899 * component, we check and return an error.
12900 */
12901 cr = msg_getcred(mp, NULL);
12902 ASSERT(cr != NULL);
12903 if (cr == NULL) {
12904 mp = mi_tpi_err_ack_alloc(mp, TSYSERR, EINVAL);
12905 if (mp != NULL)
12906 qreply(q, mp);
12907 return;
12908 }
12909
12910 if (!snmpcom_req(q, mp, ip_snmp_set, ip_snmp_get, cr)) {
12911 proto_str = "Bad SNMPCOM request?";
12912 goto protonak;
12913 }
12914 return;
12915 default:
12916 ip1dbg(("ip_wput_nondata: dropping M_PROTO prim %u\n",
12917 (int)*(uint_t *)mp->b_rptr));
12918 freemsg(mp);
12919 return;
12920 }
12921 default:
12922 break;
12923 }
12924 if (q->q_next) {
12925 putnext(q, mp);
12926 } else
12927 freemsg(mp);
12928 return;
12929
12930 nak:
12931 iocp->ioc_error = EINVAL;
12932 mp->b_datap->db_type = M_IOCNAK;
12933 iocp->ioc_count = 0;
12934 qreply(q, mp);
12935 return;
12936
12937 protonak:
12938 cmn_err(CE_NOTE, "IP doesn't process %s as a module", proto_str);
12939 if ((mp = mi_tpi_err_ack_alloc(mp, TPROTO, EINVAL)) != NULL)
12940 qreply(q, mp);
12941 }
12942
12943 /*
12944 * Process IP options in an outbound packet. Verify that the nexthop in a
12945 * strict source route is onlink.
12946 * Returns non-zero if something fails in which case an ICMP error has been
12947 * sent and mp freed.
12948 *
12949 * Assumes the ULP has called ip_massage_options to move nexthop into ipha_dst.
12950 */
12951 int
12952 ip_output_options(mblk_t *mp, ipha_t *ipha, ip_xmit_attr_t *ixa, ill_t *ill)
12953 {
12954 ipoptp_t opts;
12955 uchar_t *opt;
12956 uint8_t optval;
12957 uint8_t optlen;
12958 ipaddr_t dst;
12959 intptr_t code = 0;
12960 ire_t *ire;
12961 ip_stack_t *ipst = ixa->ixa_ipst;
12962 ip_recv_attr_t iras;
12963
12964 ip2dbg(("ip_output_options\n"));
12965
12966 dst = ipha->ipha_dst;
12967 for (optval = ipoptp_first(&opts, ipha);
12968 optval != IPOPT_EOL;
12969 optval = ipoptp_next(&opts)) {
12970 opt = opts.ipoptp_cur;
12971 optlen = opts.ipoptp_len;
12972 ip2dbg(("ip_output_options: opt %d, len %d\n",
12973 optval, optlen));
12974 switch (optval) {
12975 uint32_t off;
12976 case IPOPT_SSRR:
12977 case IPOPT_LSRR:
12978 if ((opts.ipoptp_flags & IPOPTP_ERROR) != 0) {
12979 ip1dbg((
12980 "ip_output_options: bad option offset\n"));
12981 code = (char *)&opt[IPOPT_OLEN] -
12982 (char *)ipha;
12983 goto param_prob;
12984 }
12985 off = opt[IPOPT_OFFSET];
12986 ip1dbg(("ip_output_options: next hop 0x%x\n",
12987 ntohl(dst)));
12988 /*
12989 * For strict: verify that dst is directly
12990 * reachable.
12991 */
12992 if (optval == IPOPT_SSRR) {
12993 ire = ire_ftable_lookup_v4(dst, 0, 0,
12994 IRE_INTERFACE, NULL, ALL_ZONES,
12995 ixa->ixa_tsl,
12996 MATCH_IRE_TYPE | MATCH_IRE_SECATTR, 0, ipst,
12997 NULL);
12998 if (ire == NULL) {
12999 ip1dbg(("ip_output_options: SSRR not"
13000 " directly reachable: 0x%x\n",
13001 ntohl(dst)));
13002 goto bad_src_route;
13003 }
13004 ire_refrele(ire);
13005 }
13006 break;
13007 case IPOPT_RR:
13008 if ((opts.ipoptp_flags & IPOPTP_ERROR) != 0) {
13009 ip1dbg((
13010 "ip_output_options: bad option offset\n"));
13011 code = (char *)&opt[IPOPT_OLEN] -
13012 (char *)ipha;
13013 goto param_prob;
13014 }
13015 break;
13016 case IPOPT_TS:
13017 /*
13018 * Verify that length >=5 and that there is either
13019 * room for another timestamp or that the overflow
13020 * counter is not maxed out.
13021 */
13022 code = (char *)&opt[IPOPT_OLEN] - (char *)ipha;
13023 if (optlen < IPOPT_MINLEN_IT) {
13024 goto param_prob;
13025 }
13026 if ((opts.ipoptp_flags & IPOPTP_ERROR) != 0) {
13027 ip1dbg((
13028 "ip_output_options: bad option offset\n"));
13029 code = (char *)&opt[IPOPT_OFFSET] -
13030 (char *)ipha;
13031 goto param_prob;
13032 }
13033 switch (opt[IPOPT_POS_OV_FLG] & 0x0F) {
13034 case IPOPT_TS_TSONLY:
13035 off = IPOPT_TS_TIMELEN;
13036 break;
13037 case IPOPT_TS_TSANDADDR:
13038 case IPOPT_TS_PRESPEC:
13039 case IPOPT_TS_PRESPEC_RFC791:
13040 off = IP_ADDR_LEN + IPOPT_TS_TIMELEN;
13041 break;
13042 default:
13043 code = (char *)&opt[IPOPT_POS_OV_FLG] -
13044 (char *)ipha;
13045 goto param_prob;
13046 }
13047 if (opt[IPOPT_OFFSET] - 1 + off > optlen &&
13048 (opt[IPOPT_POS_OV_FLG] & 0xF0) == 0xF0) {
13049 /*
13050 * No room and the overflow counter is 15
13051 * already.
13052 */
13053 goto param_prob;
13054 }
13055 break;
13056 }
13057 }
13058
13059 if ((opts.ipoptp_flags & IPOPTP_ERROR) == 0)
13060 return (0);
13061
13062 ip1dbg(("ip_output_options: error processing IP options."));
13063 code = (char *)&opt[IPOPT_OFFSET] - (char *)ipha;
13064
13065 param_prob:
13066 bzero(&iras, sizeof (iras));
13067 iras.ira_ill = iras.ira_rill = ill;
13068 iras.ira_ruifindex = ill->ill_phyint->phyint_ifindex;
13069 iras.ira_rifindex = iras.ira_ruifindex;
13070 iras.ira_flags = IRAF_IS_IPV4;
13071
13072 ip_drop_output("ip_output_options", mp, ill);
13073 icmp_param_problem(mp, (uint8_t)code, &iras);
13074 ASSERT(!(iras.ira_flags & IRAF_IPSEC_SECURE));
13075 return (-1);
13076
13077 bad_src_route:
13078 bzero(&iras, sizeof (iras));
13079 iras.ira_ill = iras.ira_rill = ill;
13080 iras.ira_ruifindex = ill->ill_phyint->phyint_ifindex;
13081 iras.ira_rifindex = iras.ira_ruifindex;
13082 iras.ira_flags = IRAF_IS_IPV4;
13083
13084 ip_drop_input("ICMP_SOURCE_ROUTE_FAILED", mp, ill);
13085 icmp_unreachable(mp, ICMP_SOURCE_ROUTE_FAILED, &iras);
13086 ASSERT(!(iras.ira_flags & IRAF_IPSEC_SECURE));
13087 return (-1);
13088 }
13089
13090 /*
13091 * The maximum value of conn_drain_list_cnt is CONN_MAXDRAINCNT.
13092 * conn_drain_list_cnt can be changed by setting conn_drain_nthreads
13093 * thru /etc/system.
13094 */
13095 #define CONN_MAXDRAINCNT 64
13096
13097 static void
13098 conn_drain_init(ip_stack_t *ipst)
13099 {
13100 int i, j;
13101 idl_tx_list_t *itl_tx;
13102
13103 ipst->ips_conn_drain_list_cnt = conn_drain_nthreads;
13104
13105 if ((ipst->ips_conn_drain_list_cnt == 0) ||
13106 (ipst->ips_conn_drain_list_cnt > CONN_MAXDRAINCNT)) {
13107 /*
13108 * Default value of the number of drainers is the
13109 * number of cpus, subject to maximum of 8 drainers.
13110 */
13111 if (boot_max_ncpus != -1)
13112 ipst->ips_conn_drain_list_cnt = MIN(boot_max_ncpus, 8);
13113 else
13114 ipst->ips_conn_drain_list_cnt = MIN(max_ncpus, 8);
13115 }
13116
13117 ipst->ips_idl_tx_list =
13118 kmem_zalloc(TX_FANOUT_SIZE * sizeof (idl_tx_list_t), KM_SLEEP);
13119 for (i = 0; i < TX_FANOUT_SIZE; i++) {
13120 itl_tx = &ipst->ips_idl_tx_list[i];
13121 itl_tx->txl_drain_list =
13122 kmem_zalloc(ipst->ips_conn_drain_list_cnt *
13123 sizeof (idl_t), KM_SLEEP);
13124 mutex_init(&itl_tx->txl_lock, NULL, MUTEX_DEFAULT, NULL);
13125 for (j = 0; j < ipst->ips_conn_drain_list_cnt; j++) {
13126 mutex_init(&itl_tx->txl_drain_list[j].idl_lock, NULL,
13127 MUTEX_DEFAULT, NULL);
13128 itl_tx->txl_drain_list[j].idl_itl = itl_tx;
13129 }
13130 }
13131 }
13132
13133 static void
13134 conn_drain_fini(ip_stack_t *ipst)
13135 {
13136 int i;
13137 idl_tx_list_t *itl_tx;
13138
13139 for (i = 0; i < TX_FANOUT_SIZE; i++) {
13140 itl_tx = &ipst->ips_idl_tx_list[i];
13141 kmem_free(itl_tx->txl_drain_list,
13142 ipst->ips_conn_drain_list_cnt * sizeof (idl_t));
13143 }
13144 kmem_free(ipst->ips_idl_tx_list,
13145 TX_FANOUT_SIZE * sizeof (idl_tx_list_t));
13146 ipst->ips_idl_tx_list = NULL;
13147 }
13148
13149 /*
13150 * Flow control has blocked us from proceeding. Insert the given conn in one
13151 * of the conn drain lists. When flow control is unblocked, either ip_wsrv()
13152 * (STREAMS) or ill_flow_enable() (direct) will be called back, which in turn
13153 * will call conn_walk_drain(). See the flow control notes at the top of this
13154 * file for more details.
13155 */
13156 void
13157 conn_drain_insert(conn_t *connp, idl_tx_list_t *tx_list)
13158 {
13159 idl_t *idl = tx_list->txl_drain_list;
13160 uint_t index;
13161 ip_stack_t *ipst = connp->conn_netstack->netstack_ip;
13162
13163 mutex_enter(&connp->conn_lock);
13164 if (connp->conn_state_flags & CONN_CLOSING) {
13165 /*
13166 * The conn is closing as a result of which CONN_CLOSING
13167 * is set. Return.
13168 */
13169 mutex_exit(&connp->conn_lock);
13170 return;
13171 } else if (connp->conn_idl == NULL) {
13172 /*
13173 * Assign the next drain list round robin. We dont' use
13174 * a lock, and thus it may not be strictly round robin.
13175 * Atomicity of load/stores is enough to make sure that
13176 * conn_drain_list_index is always within bounds.
13177 */
13178 index = tx_list->txl_drain_index;
13179 ASSERT(index < ipst->ips_conn_drain_list_cnt);
13180 connp->conn_idl = &tx_list->txl_drain_list[index];
13181 index++;
13182 if (index == ipst->ips_conn_drain_list_cnt)
13183 index = 0;
13184 tx_list->txl_drain_index = index;
13185 } else {
13186 ASSERT(connp->conn_idl->idl_itl == tx_list);
13187 }
13188 mutex_exit(&connp->conn_lock);
13189
13190 idl = connp->conn_idl;
13191 mutex_enter(&idl->idl_lock);
13192 if ((connp->conn_drain_prev != NULL) ||
13193 (connp->conn_state_flags & CONN_CLOSING)) {
13194 /*
13195 * The conn is either already in the drain list or closing.
13196 * (We needed to check for CONN_CLOSING again since close can
13197 * sneak in between dropping conn_lock and acquiring idl_lock.)
13198 */
13199 mutex_exit(&idl->idl_lock);
13200 return;
13201 }
13202
13203 /*
13204 * The conn is not in the drain list. Insert it at the
13205 * tail of the drain list. The drain list is circular
13206 * and doubly linked. idl_conn points to the 1st element
13207 * in the list.
13208 */
13209 if (idl->idl_conn == NULL) {
13210 idl->idl_conn = connp;
13211 connp->conn_drain_next = connp;
13212 connp->conn_drain_prev = connp;
13213 } else {
13214 conn_t *head = idl->idl_conn;
13215
13216 connp->conn_drain_next = head;
13217 connp->conn_drain_prev = head->conn_drain_prev;
13218 head->conn_drain_prev->conn_drain_next = connp;
13219 head->conn_drain_prev = connp;
13220 }
13221 /*
13222 * For non streams based sockets assert flow control.
13223 */
13224 conn_setqfull(connp, NULL);
13225 mutex_exit(&idl->idl_lock);
13226 }
13227
13228 static void
13229 conn_drain_remove(conn_t *connp)
13230 {
13231 idl_t *idl = connp->conn_idl;
13232
13233 if (idl != NULL) {
13234 /*
13235 * Remove ourself from the drain list.
13236 */
13237 if (connp->conn_drain_next == connp) {
13238 /* Singleton in the list */
13239 ASSERT(connp->conn_drain_prev == connp);
13240 idl->idl_conn = NULL;
13241 } else {
13242 connp->conn_drain_prev->conn_drain_next =
13243 connp->conn_drain_next;
13244 connp->conn_drain_next->conn_drain_prev =
13245 connp->conn_drain_prev;
13246 if (idl->idl_conn == connp)
13247 idl->idl_conn = connp->conn_drain_next;
13248 }
13249
13250 /*
13251 * NOTE: because conn_idl is associated with a specific drain
13252 * list which in turn is tied to the index the TX ring
13253 * (txl_cookie) hashes to, and because the TX ring can change
13254 * over the lifetime of the conn_t, we must clear conn_idl so
13255 * a subsequent conn_drain_insert() will set conn_idl again
13256 * based on the latest txl_cookie.
13257 */
13258 connp->conn_idl = NULL;
13259 }
13260 connp->conn_drain_next = NULL;
13261 connp->conn_drain_prev = NULL;
13262
13263 conn_clrqfull(connp, NULL);
13264 /*
13265 * For streams based sockets open up flow control.
13266 */
13267 if (!IPCL_IS_NONSTR(connp))
13268 enableok(connp->conn_wq);
13269 }
13270
13271 /*
13272 * This conn is closing, and we are called from ip_close. OR
13273 * this conn is draining because flow-control on the ill has been relieved.
13274 *
13275 * We must also need to remove conn's on this idl from the list, and also
13276 * inform the sockfs upcalls about the change in flow-control.
13277 */
13278 static void
13279 conn_drain(conn_t *connp, boolean_t closing)
13280 {
13281 idl_t *idl;
13282 conn_t *next_connp;
13283
13284 /*
13285 * connp->conn_idl is stable at this point, and no lock is needed
13286 * to check it. If we are called from ip_close, close has already
13287 * set CONN_CLOSING, thus freezing the value of conn_idl, and
13288 * called us only because conn_idl is non-null. If we are called thru
13289 * service, conn_idl could be null, but it cannot change because
13290 * service is single-threaded per queue, and there cannot be another
13291 * instance of service trying to call conn_drain_insert on this conn
13292 * now.
13293 */
13294 ASSERT(!closing || connp == NULL || connp->conn_idl != NULL);
13295
13296 /*
13297 * If the conn doesn't exist or is not on a drain list, bail.
13298 */
13299 if (connp == NULL || connp->conn_idl == NULL ||
13300 connp->conn_drain_prev == NULL) {
13301 return;
13302 }
13303
13304 idl = connp->conn_idl;
13305 ASSERT(MUTEX_HELD(&idl->idl_lock));
13306
13307 if (!closing) {
13308 next_connp = connp->conn_drain_next;
13309 while (next_connp != connp) {
13310 conn_t *delconnp = next_connp;
13311
13312 next_connp = next_connp->conn_drain_next;
13313 conn_drain_remove(delconnp);
13314 }
13315 ASSERT(connp->conn_drain_next == idl->idl_conn);
13316 }
13317 conn_drain_remove(connp);
13318 }
13319
13320 /*
13321 * Write service routine. Shared perimeter entry point.
13322 * The device queue's messages has fallen below the low water mark and STREAMS
13323 * has backenabled the ill_wq. Send sockfs notification about flow-control on
13324 * each waiting conn.
13325 */
13326 void
13327 ip_wsrv(queue_t *q)
13328 {
13329 ill_t *ill;
13330
13331 ill = (ill_t *)q->q_ptr;
13332 if (ill->ill_state_flags == 0) {
13333 ip_stack_t *ipst = ill->ill_ipst;
13334
13335 /*
13336 * The device flow control has opened up.
13337 * Walk through conn drain lists and qenable the
13338 * first conn in each list. This makes sense only
13339 * if the stream is fully plumbed and setup.
13340 * Hence the ill_state_flags check above.
13341 */
13342 ip1dbg(("ip_wsrv: walking\n"));
13343 conn_walk_drain(ipst, &ipst->ips_idl_tx_list[0]);
13344 enableok(ill->ill_wq);
13345 }
13346 }
13347
13348 /*
13349 * Callback to disable flow control in IP.
13350 *
13351 * This is a mac client callback added when the DLD_CAPAB_DIRECT capability
13352 * is enabled.
13353 *
13354 * When MAC_TX() is not able to send any more packets, dld sets its queue
13355 * to QFULL and enable the STREAMS flow control. Later, when the underlying
13356 * driver is able to continue to send packets, it calls mac_tx_(ring_)update()
13357 * function and wakes up corresponding mac worker threads, which in turn
13358 * calls this callback function, and disables flow control.
13359 */
13360 void
13361 ill_flow_enable(void *arg, ip_mac_tx_cookie_t cookie)
13362 {
13363 ill_t *ill = (ill_t *)arg;
13364 ip_stack_t *ipst = ill->ill_ipst;
13365 idl_tx_list_t *idl_txl;
13366
13367 idl_txl = &ipst->ips_idl_tx_list[IDLHASHINDEX(cookie)];
13368 mutex_enter(&idl_txl->txl_lock);
13369 /* add code to to set a flag to indicate idl_txl is enabled */
13370 conn_walk_drain(ipst, idl_txl);
13371 mutex_exit(&idl_txl->txl_lock);
13372 }
13373
13374 /*
13375 * Flow control has been relieved and STREAMS has backenabled us; drain
13376 * all the conn lists on `tx_list'.
13377 */
13378 static void
13379 conn_walk_drain(ip_stack_t *ipst, idl_tx_list_t *tx_list)
13380 {
13381 int i;
13382 idl_t *idl;
13383
13384 IP_STAT(ipst, ip_conn_walk_drain);
13385
13386 for (i = 0; i < ipst->ips_conn_drain_list_cnt; i++) {
13387 idl = &tx_list->txl_drain_list[i];
13388 mutex_enter(&idl->idl_lock);
13389 conn_drain(idl->idl_conn, B_FALSE);
13390 mutex_exit(&idl->idl_lock);
13391 }
13392 }
13393
13394 /*
13395 * Determine if the ill and multicast aspects of that packets
13396 * "matches" the conn.
13397 */
13398 boolean_t
13399 conn_wantpacket(conn_t *connp, ip_recv_attr_t *ira, ipha_t *ipha)
13400 {
13401 ill_t *ill = ira->ira_rill;
13402 zoneid_t zoneid = ira->ira_zoneid;
13403 uint_t in_ifindex;
13404 ipaddr_t dst, src;
13405
13406 dst = ipha->ipha_dst;
13407 src = ipha->ipha_src;
13408
13409 /*
13410 * conn_incoming_ifindex is set by IP_BOUND_IF which limits
13411 * unicast, broadcast and multicast reception to
13412 * conn_incoming_ifindex.
13413 * conn_wantpacket is called for unicast, broadcast and
13414 * multicast packets.
13415 */
13416 in_ifindex = connp->conn_incoming_ifindex;
13417
13418 /* mpathd can bind to the under IPMP interface, which we allow */
13419 if (in_ifindex != 0 && in_ifindex != ill->ill_phyint->phyint_ifindex) {
13420 if (!IS_UNDER_IPMP(ill))
13421 return (B_FALSE);
13422
13423 if (in_ifindex != ipmp_ill_get_ipmp_ifindex(ill))
13424 return (B_FALSE);
13425 }
13426
13427 if (!IPCL_ZONE_MATCH(connp, zoneid))
13428 return (B_FALSE);
13429
13430 if (!(ira->ira_flags & IRAF_MULTICAST))
13431 return (B_TRUE);
13432
13433 if (connp->conn_multi_router) {
13434 /* multicast packet and multicast router socket: send up */
13435 return (B_TRUE);
13436 }
13437
13438 if (ipha->ipha_protocol == IPPROTO_PIM ||
13439 ipha->ipha_protocol == IPPROTO_RSVP)
13440 return (B_TRUE);
13441
13442 return (conn_hasmembers_ill_withsrc_v4(connp, dst, src, ira->ira_ill));
13443 }
13444
13445 void
13446 conn_setqfull(conn_t *connp, boolean_t *flow_stopped)
13447 {
13448 if (IPCL_IS_NONSTR(connp)) {
13449 (*connp->conn_upcalls->su_txq_full)
13450 (connp->conn_upper_handle, B_TRUE);
13451 if (flow_stopped != NULL)
13452 *flow_stopped = B_TRUE;
13453 } else {
13454 queue_t *q = connp->conn_wq;
13455
13456 ASSERT(q != NULL);
13457 if (!(q->q_flag & QFULL)) {
13458 mutex_enter(QLOCK(q));
13459 if (!(q->q_flag & QFULL)) {
13460 /* still need to set QFULL */
13461 q->q_flag |= QFULL;
13462 /* set flow_stopped to true under QLOCK */
13463 if (flow_stopped != NULL)
13464 *flow_stopped = B_TRUE;
13465 mutex_exit(QLOCK(q));
13466 } else {
13467 /* flow_stopped is left unchanged */
13468 mutex_exit(QLOCK(q));
13469 }
13470 }
13471 }
13472 }
13473
13474 void
13475 conn_clrqfull(conn_t *connp, boolean_t *flow_stopped)
13476 {
13477 if (IPCL_IS_NONSTR(connp)) {
13478 (*connp->conn_upcalls->su_txq_full)
13479 (connp->conn_upper_handle, B_FALSE);
13480 if (flow_stopped != NULL)
13481 *flow_stopped = B_FALSE;
13482 } else {
13483 queue_t *q = connp->conn_wq;
13484
13485 ASSERT(q != NULL);
13486 if (q->q_flag & QFULL) {
13487 mutex_enter(QLOCK(q));
13488 if (q->q_flag & QFULL) {
13489 q->q_flag &= ~QFULL;
13490 /* set flow_stopped to false under QLOCK */
13491 if (flow_stopped != NULL)
13492 *flow_stopped = B_FALSE;
13493 mutex_exit(QLOCK(q));
13494 if (q->q_flag & QWANTW)
13495 qbackenable(q, 0);
13496 } else {
13497 /* flow_stopped is left unchanged */
13498 mutex_exit(QLOCK(q));
13499 }
13500 }
13501 }
13502
13503 mutex_enter(&connp->conn_lock);
13504 connp->conn_blocked = B_FALSE;
13505 mutex_exit(&connp->conn_lock);
13506 }
13507
13508 /*
13509 * Return the length in bytes of the IPv4 headers (base header, label, and
13510 * other IP options) that will be needed based on the
13511 * ip_pkt_t structure passed by the caller.
13512 *
13513 * The returned length does not include the length of the upper level
13514 * protocol (ULP) header.
13515 * The caller needs to check that the length doesn't exceed the max for IPv4.
13516 */
13517 int
13518 ip_total_hdrs_len_v4(const ip_pkt_t *ipp)
13519 {
13520 int len;
13521
13522 len = IP_SIMPLE_HDR_LENGTH;
13523 if (ipp->ipp_fields & IPPF_LABEL_V4) {
13524 ASSERT(ipp->ipp_label_len_v4 != 0);
13525 /* We need to round up here */
13526 len += (ipp->ipp_label_len_v4 + 3) & ~3;
13527 }
13528
13529 if (ipp->ipp_fields & IPPF_IPV4_OPTIONS) {
13530 ASSERT(ipp->ipp_ipv4_options_len != 0);
13531 ASSERT((ipp->ipp_ipv4_options_len & 3) == 0);
13532 len += ipp->ipp_ipv4_options_len;
13533 }
13534 return (len);
13535 }
13536
13537 /*
13538 * All-purpose routine to build an IPv4 header with options based
13539 * on the abstract ip_pkt_t.
13540 *
13541 * The caller has to set the source and destination address as well as
13542 * ipha_length. The caller has to massage any source route and compensate
13543 * for the ULP pseudo-header checksum due to the source route.
13544 */
13545 void
13546 ip_build_hdrs_v4(uchar_t *buf, uint_t buf_len, const ip_pkt_t *ipp,
13547 uint8_t protocol)
13548 {
13549 ipha_t *ipha = (ipha_t *)buf;
13550 uint8_t *cp;
13551
13552 /* Initialize IPv4 header */
13553 ipha->ipha_type_of_service = ipp->ipp_type_of_service;
13554 ipha->ipha_length = 0; /* Caller will set later */
13555 ipha->ipha_ident = 0;
13556 ipha->ipha_fragment_offset_and_flags = 0;
13557 ipha->ipha_ttl = ipp->ipp_unicast_hops;
13558 ipha->ipha_protocol = protocol;
13559 ipha->ipha_hdr_checksum = 0;
13560
13561 if ((ipp->ipp_fields & IPPF_ADDR) &&
13562 IN6_IS_ADDR_V4MAPPED(&ipp->ipp_addr))
13563 ipha->ipha_src = ipp->ipp_addr_v4;
13564
13565 cp = (uint8_t *)&ipha[1];
13566 if (ipp->ipp_fields & IPPF_LABEL_V4) {
13567 ASSERT(ipp->ipp_label_len_v4 != 0);
13568 bcopy(ipp->ipp_label_v4, cp, ipp->ipp_label_len_v4);
13569 cp += ipp->ipp_label_len_v4;
13570 /* We need to round up here */
13571 while ((uintptr_t)cp & 0x3) {
13572 *cp++ = IPOPT_NOP;
13573 }
13574 }
13575
13576 if (ipp->ipp_fields & IPPF_IPV4_OPTIONS) {
13577 ASSERT(ipp->ipp_ipv4_options_len != 0);
13578 ASSERT((ipp->ipp_ipv4_options_len & 3) == 0);
13579 bcopy(ipp->ipp_ipv4_options, cp, ipp->ipp_ipv4_options_len);
13580 cp += ipp->ipp_ipv4_options_len;
13581 }
13582 ipha->ipha_version_and_hdr_length =
13583 (uint8_t)((IP_VERSION << 4) + buf_len / 4);
13584
13585 ASSERT((int)(cp - buf) == buf_len);
13586 }
13587
13588 /* Allocate the private structure */
13589 static int
13590 ip_priv_alloc(void **bufp)
13591 {
13592 void *buf;
13593
13594 if ((buf = kmem_alloc(sizeof (ip_priv_t), KM_NOSLEEP)) == NULL)
13595 return (ENOMEM);
13596
13597 *bufp = buf;
13598 return (0);
13599 }
13600
13601 /* Function to delete the private structure */
13602 void
13603 ip_priv_free(void *buf)
13604 {
13605 ASSERT(buf != NULL);
13606 kmem_free(buf, sizeof (ip_priv_t));
13607 }
13608
13609 /*
13610 * The entry point for IPPF processing.
13611 * If the classifier (IPGPC_CLASSIFY) is not loaded and configured, the
13612 * routine just returns.
13613 *
13614 * When called, ip_process generates an ipp_packet_t structure
13615 * which holds the state information for this packet and invokes the
13616 * the classifier (via ipp_packet_process). The classification, depending on
13617 * configured filters, results in a list of actions for this packet. Invoking
13618 * an action may cause the packet to be dropped, in which case we return NULL.
13619 * proc indicates the callout position for
13620 * this packet and ill is the interface this packet arrived on or will leave
13621 * on (inbound and outbound resp.).
13622 *
13623 * We do the processing on the rill (mapped to the upper if ipmp), but MIB
13624 * on the ill corrsponding to the destination IP address.
13625 */
13626 mblk_t *
13627 ip_process(ip_proc_t proc, mblk_t *mp, ill_t *rill, ill_t *ill)
13628 {
13629 ip_priv_t *priv;
13630 ipp_action_id_t aid;
13631 int rc = 0;
13632 ipp_packet_t *pp;
13633
13634 /* If the classifier is not loaded, return */
13635 if ((aid = ipp_action_lookup(IPGPC_CLASSIFY)) == IPP_ACTION_INVAL) {
13636 return (mp);
13637 }
13638
13639 ASSERT(mp != NULL);
13640
13641 /* Allocate the packet structure */
13642 rc = ipp_packet_alloc(&pp, "ip", aid);
13643 if (rc != 0)
13644 goto drop;
13645
13646 /* Allocate the private structure */
13647 rc = ip_priv_alloc((void **)&priv);
13648 if (rc != 0) {
13649 ipp_packet_free(pp);
13650 goto drop;
13651 }
13652 priv->proc = proc;
13653 priv->ill_index = ill_get_upper_ifindex(rill);
13654
13655 ipp_packet_set_private(pp, priv, ip_priv_free);
13656 ipp_packet_set_data(pp, mp);
13657
13658 /* Invoke the classifier */
13659 rc = ipp_packet_process(&pp);
13660 if (pp != NULL) {
13661 mp = ipp_packet_get_data(pp);
13662 ipp_packet_free(pp);
13663 if (rc != 0)
13664 goto drop;
13665 return (mp);
13666 } else {
13667 /* No mp to trace in ip_drop_input/ip_drop_output */
13668 mp = NULL;
13669 }
13670 drop:
13671 if (proc == IPP_LOCAL_IN || proc == IPP_FWD_IN) {
13672 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
13673 ip_drop_input("ip_process", mp, ill);
13674 } else {
13675 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutDiscards);
13676 ip_drop_output("ip_process", mp, ill);
13677 }
13678 freemsg(mp);
13679 return (NULL);
13680 }
13681
13682 /*
13683 * Propagate a multicast group membership operation (add/drop) on
13684 * all the interfaces crossed by the related multirt routes.
13685 * The call is considered successful if the operation succeeds
13686 * on at least one interface.
13687 *
13688 * This assumes that a set of IRE_HOST/RTF_MULTIRT has been created for the
13689 * multicast addresses with the ire argument being the first one.
13690 * We walk the bucket to find all the of those.
13691 *
13692 * Common to IPv4 and IPv6.
13693 */
13694 static int
13695 ip_multirt_apply_membership(int (*fn)(conn_t *, boolean_t,
13696 const in6_addr_t *, ipaddr_t, uint_t, mcast_record_t, const in6_addr_t *),
13697 ire_t *ire, conn_t *connp, boolean_t checkonly, const in6_addr_t *v6group,
13698 mcast_record_t fmode, const in6_addr_t *v6src)
13699 {
13700 ire_t *ire_gw;
13701 irb_t *irb;
13702 int ifindex;
13703 int error = 0;
13704 int result;
13705 ip_stack_t *ipst = ire->ire_ipst;
13706 ipaddr_t group;
13707 boolean_t isv6;
13708 int match_flags;
13709
13710 if (IN6_IS_ADDR_V4MAPPED(v6group)) {
13711 IN6_V4MAPPED_TO_IPADDR(v6group, group);
13712 isv6 = B_FALSE;
13713 } else {
13714 isv6 = B_TRUE;
13715 }
13716
13717 irb = ire->ire_bucket;
13718 ASSERT(irb != NULL);
13719
13720 result = 0;
13721 irb_refhold(irb);
13722 for (; ire != NULL; ire = ire->ire_next) {
13723 if ((ire->ire_flags & RTF_MULTIRT) == 0)
13724 continue;
13725
13726 /* We handle -ifp routes by matching on the ill if set */
13727 match_flags = MATCH_IRE_TYPE;
13728 if (ire->ire_ill != NULL)
13729 match_flags |= MATCH_IRE_ILL;
13730
13731 if (isv6) {
13732 if (!IN6_ARE_ADDR_EQUAL(&ire->ire_addr_v6, v6group))
13733 continue;
13734
13735 ire_gw = ire_ftable_lookup_v6(&ire->ire_gateway_addr_v6,
13736 0, 0, IRE_INTERFACE, ire->ire_ill, ALL_ZONES, NULL,
13737 match_flags, 0, ipst, NULL);
13738 } else {
13739 if (ire->ire_addr != group)
13740 continue;
13741
13742 ire_gw = ire_ftable_lookup_v4(ire->ire_gateway_addr,
13743 0, 0, IRE_INTERFACE, ire->ire_ill, ALL_ZONES, NULL,
13744 match_flags, 0, ipst, NULL);
13745 }
13746 /* No interface route exists for the gateway; skip this ire. */
13747 if (ire_gw == NULL)
13748 continue;
13749 if (ire_gw->ire_flags & (RTF_REJECT|RTF_BLACKHOLE)) {
13750 ire_refrele(ire_gw);
13751 continue;
13752 }
13753 ASSERT(ire_gw->ire_ill != NULL); /* IRE_INTERFACE */
13754 ifindex = ire_gw->ire_ill->ill_phyint->phyint_ifindex;
13755
13756 /*
13757 * The operation is considered a success if
13758 * it succeeds at least once on any one interface.
13759 */
13760 error = fn(connp, checkonly, v6group, INADDR_ANY, ifindex,
13761 fmode, v6src);
13762 if (error == 0)
13763 result = CGTP_MCAST_SUCCESS;
13764
13765 ire_refrele(ire_gw);
13766 }
13767 irb_refrele(irb);
13768 /*
13769 * Consider the call as successful if we succeeded on at least
13770 * one interface. Otherwise, return the last encountered error.
13771 */
13772 return (result == CGTP_MCAST_SUCCESS ? 0 : error);
13773 }
13774
13775 /*
13776 * Return the expected CGTP hooks version number.
13777 */
13778 int
13779 ip_cgtp_filter_supported(void)
13780 {
13781 return (ip_cgtp_filter_rev);
13782 }
13783
13784 /*
13785 * CGTP hooks can be registered by invoking this function.
13786 * Checks that the version number matches.
13787 */
13788 int
13789 ip_cgtp_filter_register(netstackid_t stackid, cgtp_filter_ops_t *ops)
13790 {
13791 netstack_t *ns;
13792 ip_stack_t *ipst;
13793
13794 if (ops->cfo_filter_rev != CGTP_FILTER_REV)
13795 return (ENOTSUP);
13796
13797 ns = netstack_find_by_stackid(stackid);
13798 if (ns == NULL)
13799 return (EINVAL);
13800 ipst = ns->netstack_ip;
13801 ASSERT(ipst != NULL);
13802
13803 if (ipst->ips_ip_cgtp_filter_ops != NULL) {
13804 netstack_rele(ns);
13805 return (EALREADY);
13806 }
13807
13808 ipst->ips_ip_cgtp_filter_ops = ops;
13809
13810 ill_set_inputfn_all(ipst);
13811
13812 netstack_rele(ns);
13813 return (0);
13814 }
13815
13816 /*
13817 * CGTP hooks can be unregistered by invoking this function.
13818 * Returns ENXIO if there was no registration.
13819 * Returns EBUSY if the ndd variable has not been turned off.
13820 */
13821 int
13822 ip_cgtp_filter_unregister(netstackid_t stackid)
13823 {
13824 netstack_t *ns;
13825 ip_stack_t *ipst;
13826
13827 ns = netstack_find_by_stackid(stackid);
13828 if (ns == NULL)
13829 return (EINVAL);
13830 ipst = ns->netstack_ip;
13831 ASSERT(ipst != NULL);
13832
13833 if (ipst->ips_ip_cgtp_filter) {
13834 netstack_rele(ns);
13835 return (EBUSY);
13836 }
13837
13838 if (ipst->ips_ip_cgtp_filter_ops == NULL) {
13839 netstack_rele(ns);
13840 return (ENXIO);
13841 }
13842 ipst->ips_ip_cgtp_filter_ops = NULL;
13843
13844 ill_set_inputfn_all(ipst);
13845
13846 netstack_rele(ns);
13847 return (0);
13848 }
13849
13850 /*
13851 * Check whether there is a CGTP filter registration.
13852 * Returns non-zero if there is a registration, otherwise returns zero.
13853 * Note: returns zero if bad stackid.
13854 */
13855 int
13856 ip_cgtp_filter_is_registered(netstackid_t stackid)
13857 {
13858 netstack_t *ns;
13859 ip_stack_t *ipst;
13860 int ret;
13861
13862 ns = netstack_find_by_stackid(stackid);
13863 if (ns == NULL)
13864 return (0);
13865 ipst = ns->netstack_ip;
13866 ASSERT(ipst != NULL);
13867
13868 if (ipst->ips_ip_cgtp_filter_ops != NULL)
13869 ret = 1;
13870 else
13871 ret = 0;
13872
13873 netstack_rele(ns);
13874 return (ret);
13875 }
13876
13877 static int
13878 ip_squeue_switch(int val)
13879 {
13880 int rval;
13881
13882 switch (val) {
13883 case IP_SQUEUE_ENTER_NODRAIN:
13884 rval = SQ_NODRAIN;
13885 break;
13886 case IP_SQUEUE_ENTER:
13887 rval = SQ_PROCESS;
13888 break;
13889 case IP_SQUEUE_FILL:
13890 default:
13891 rval = SQ_FILL;
13892 break;
13893 }
13894 return (rval);
13895 }
13896
13897 static void *
13898 ip_kstat2_init(netstackid_t stackid, ip_stat_t *ip_statisticsp)
13899 {
13900 kstat_t *ksp;
13901
13902 ip_stat_t template = {
13903 { "ip_udp_fannorm", KSTAT_DATA_UINT64 },
13904 { "ip_udp_fanmb", KSTAT_DATA_UINT64 },
13905 { "ip_recv_pullup", KSTAT_DATA_UINT64 },
13906 { "ip_db_ref", KSTAT_DATA_UINT64 },
13907 { "ip_notaligned", KSTAT_DATA_UINT64 },
13908 { "ip_multimblk", KSTAT_DATA_UINT64 },
13909 { "ip_opt", KSTAT_DATA_UINT64 },
13910 { "ipsec_proto_ahesp", KSTAT_DATA_UINT64 },
13911 { "ip_conn_flputbq", KSTAT_DATA_UINT64 },
13912 { "ip_conn_walk_drain", KSTAT_DATA_UINT64 },
13913 { "ip_out_sw_cksum", KSTAT_DATA_UINT64 },
13914 { "ip_out_sw_cksum_bytes", KSTAT_DATA_UINT64 },
13915 { "ip_in_sw_cksum", KSTAT_DATA_UINT64 },
13916 { "ip_ire_reclaim_calls", KSTAT_DATA_UINT64 },
13917 { "ip_ire_reclaim_deleted", KSTAT_DATA_UINT64 },
13918 { "ip_nce_reclaim_calls", KSTAT_DATA_UINT64 },
13919 { "ip_nce_reclaim_deleted", KSTAT_DATA_UINT64 },
13920 { "ip_dce_reclaim_calls", KSTAT_DATA_UINT64 },
13921 { "ip_dce_reclaim_deleted", KSTAT_DATA_UINT64 },
13922 { "ip_tcp_in_full_hw_cksum_err", KSTAT_DATA_UINT64 },
13923 { "ip_tcp_in_part_hw_cksum_err", KSTAT_DATA_UINT64 },
13924 { "ip_tcp_in_sw_cksum_err", KSTAT_DATA_UINT64 },
13925 { "ip_udp_in_full_hw_cksum_err", KSTAT_DATA_UINT64 },
13926 { "ip_udp_in_part_hw_cksum_err", KSTAT_DATA_UINT64 },
13927 { "ip_udp_in_sw_cksum_err", KSTAT_DATA_UINT64 },
13928 { "conn_in_recvdstaddr", KSTAT_DATA_UINT64 },
13929 { "conn_in_recvopts", KSTAT_DATA_UINT64 },
13930 { "conn_in_recvif", KSTAT_DATA_UINT64 },
13931 { "conn_in_recvslla", KSTAT_DATA_UINT64 },
13932 { "conn_in_recvucred", KSTAT_DATA_UINT64 },
13933 { "conn_in_recvttl", KSTAT_DATA_UINT64 },
13934 { "conn_in_recvhopopts", KSTAT_DATA_UINT64 },
13935 { "conn_in_recvhoplimit", KSTAT_DATA_UINT64 },
13936 { "conn_in_recvdstopts", KSTAT_DATA_UINT64 },
13937 { "conn_in_recvrthdrdstopts", KSTAT_DATA_UINT64 },
13938 { "conn_in_recvrthdr", KSTAT_DATA_UINT64 },
13939 { "conn_in_recvpktinfo", KSTAT_DATA_UINT64 },
13940 { "conn_in_recvtclass", KSTAT_DATA_UINT64 },
13941 { "conn_in_timestamp", KSTAT_DATA_UINT64 },
13942 };
13943
13944 ksp = kstat_create_netstack("ip", 0, "ipstat", "net",
13945 KSTAT_TYPE_NAMED, sizeof (template) / sizeof (kstat_named_t),
13946 KSTAT_FLAG_VIRTUAL, stackid);
13947
13948 if (ksp == NULL)
13949 return (NULL);
13950
13951 bcopy(&template, ip_statisticsp, sizeof (template));
13952 ksp->ks_data = (void *)ip_statisticsp;
13953 ksp->ks_private = (void *)(uintptr_t)stackid;
13954
13955 kstat_install(ksp);
13956 return (ksp);
13957 }
13958
13959 static void
13960 ip_kstat2_fini(netstackid_t stackid, kstat_t *ksp)
13961 {
13962 if (ksp != NULL) {
13963 ASSERT(stackid == (netstackid_t)(uintptr_t)ksp->ks_private);
13964 kstat_delete_netstack(ksp, stackid);
13965 }
13966 }
13967
13968 static void *
13969 ip_kstat_init(netstackid_t stackid, ip_stack_t *ipst)
13970 {
13971 kstat_t *ksp;
13972
13973 ip_named_kstat_t template = {
13974 { "forwarding", KSTAT_DATA_UINT32, 0 },
13975 { "defaultTTL", KSTAT_DATA_UINT32, 0 },
13976 { "inReceives", KSTAT_DATA_UINT64, 0 },
13977 { "inHdrErrors", KSTAT_DATA_UINT32, 0 },
13978 { "inAddrErrors", KSTAT_DATA_UINT32, 0 },
13979 { "forwDatagrams", KSTAT_DATA_UINT64, 0 },
13980 { "inUnknownProtos", KSTAT_DATA_UINT32, 0 },
13981 { "inDiscards", KSTAT_DATA_UINT32, 0 },
13982 { "inDelivers", KSTAT_DATA_UINT64, 0 },
13983 { "outRequests", KSTAT_DATA_UINT64, 0 },
13984 { "outDiscards", KSTAT_DATA_UINT32, 0 },
13985 { "outNoRoutes", KSTAT_DATA_UINT32, 0 },
13986 { "reasmTimeout", KSTAT_DATA_UINT32, 0 },
13987 { "reasmReqds", KSTAT_DATA_UINT32, 0 },
13988 { "reasmOKs", KSTAT_DATA_UINT32, 0 },
13989 { "reasmFails", KSTAT_DATA_UINT32, 0 },
13990 { "fragOKs", KSTAT_DATA_UINT32, 0 },
13991 { "fragFails", KSTAT_DATA_UINT32, 0 },
13992 { "fragCreates", KSTAT_DATA_UINT32, 0 },
13993 { "addrEntrySize", KSTAT_DATA_INT32, 0 },
13994 { "routeEntrySize", KSTAT_DATA_INT32, 0 },
13995 { "netToMediaEntrySize", KSTAT_DATA_INT32, 0 },
13996 { "routingDiscards", KSTAT_DATA_UINT32, 0 },
13997 { "inErrs", KSTAT_DATA_UINT32, 0 },
13998 { "noPorts", KSTAT_DATA_UINT32, 0 },
13999 { "inCksumErrs", KSTAT_DATA_UINT32, 0 },
14000 { "reasmDuplicates", KSTAT_DATA_UINT32, 0 },
14001 { "reasmPartDups", KSTAT_DATA_UINT32, 0 },
14002 { "forwProhibits", KSTAT_DATA_UINT32, 0 },
14003 { "udpInCksumErrs", KSTAT_DATA_UINT32, 0 },
14004 { "udpInOverflows", KSTAT_DATA_UINT32, 0 },
14005 { "rawipInOverflows", KSTAT_DATA_UINT32, 0 },
14006 { "ipsecInSucceeded", KSTAT_DATA_UINT32, 0 },
14007 { "ipsecInFailed", KSTAT_DATA_INT32, 0 },
14008 { "memberEntrySize", KSTAT_DATA_INT32, 0 },
14009 { "inIPv6", KSTAT_DATA_UINT32, 0 },
14010 { "outIPv6", KSTAT_DATA_UINT32, 0 },
14011 { "outSwitchIPv6", KSTAT_DATA_UINT32, 0 },
14012 };
14013
14014 ksp = kstat_create_netstack("ip", 0, "ip", "mib2", KSTAT_TYPE_NAMED,
14015 NUM_OF_FIELDS(ip_named_kstat_t), 0, stackid);
14016 if (ksp == NULL || ksp->ks_data == NULL)
14017 return (NULL);
14018
14019 template.forwarding.value.ui32 = WE_ARE_FORWARDING(ipst) ? 1:2;
14020 template.defaultTTL.value.ui32 = (uint32_t)ipst->ips_ip_def_ttl;
14021 template.reasmTimeout.value.ui32 = ipst->ips_ip_reassembly_timeout;
14022 template.addrEntrySize.value.i32 = sizeof (mib2_ipAddrEntry_t);
14023 template.routeEntrySize.value.i32 = sizeof (mib2_ipRouteEntry_t);
14024
14025 template.netToMediaEntrySize.value.i32 =
14026 sizeof (mib2_ipNetToMediaEntry_t);
14027
14028 template.memberEntrySize.value.i32 = sizeof (ipv6_member_t);
14029
14030 bcopy(&template, ksp->ks_data, sizeof (template));
14031 ksp->ks_update = ip_kstat_update;
14032 ksp->ks_private = (void *)(uintptr_t)stackid;
14033
14034 kstat_install(ksp);
14035 return (ksp);
14036 }
14037
14038 static void
14039 ip_kstat_fini(netstackid_t stackid, kstat_t *ksp)
14040 {
14041 if (ksp != NULL) {
14042 ASSERT(stackid == (netstackid_t)(uintptr_t)ksp->ks_private);
14043 kstat_delete_netstack(ksp, stackid);
14044 }
14045 }
14046
14047 static int
14048 ip_kstat_update(kstat_t *kp, int rw)
14049 {
14050 ip_named_kstat_t *ipkp;
14051 mib2_ipIfStatsEntry_t ipmib;
14052 ill_walk_context_t ctx;
14053 ill_t *ill;
14054 netstackid_t stackid = (zoneid_t)(uintptr_t)kp->ks_private;
14055 netstack_t *ns;
14056 ip_stack_t *ipst;
14057
14058 if (kp == NULL || kp->ks_data == NULL)
14059 return (EIO);
14060
14061 if (rw == KSTAT_WRITE)
14062 return (EACCES);
14063
14064 ns = netstack_find_by_stackid(stackid);
14065 if (ns == NULL)
14066 return (-1);
14067 ipst = ns->netstack_ip;
14068 if (ipst == NULL) {
14069 netstack_rele(ns);
14070 return (-1);
14071 }
14072 ipkp = (ip_named_kstat_t *)kp->ks_data;
14073
14074 bcopy(&ipst->ips_ip_mib, &ipmib, sizeof (ipmib));
14075 rw_enter(&ipst->ips_ill_g_lock, RW_READER);
14076 ill = ILL_START_WALK_V4(&ctx, ipst);
14077 for (; ill != NULL; ill = ill_next(&ctx, ill))
14078 ip_mib2_add_ip_stats(&ipmib, ill->ill_ip_mib);
14079 rw_exit(&ipst->ips_ill_g_lock);
14080
14081 ipkp->forwarding.value.ui32 = ipmib.ipIfStatsForwarding;
14082 ipkp->defaultTTL.value.ui32 = ipmib.ipIfStatsDefaultTTL;
14083 ipkp->inReceives.value.ui64 = ipmib.ipIfStatsHCInReceives;
14084 ipkp->inHdrErrors.value.ui32 = ipmib.ipIfStatsInHdrErrors;
14085 ipkp->inAddrErrors.value.ui32 = ipmib.ipIfStatsInAddrErrors;
14086 ipkp->forwDatagrams.value.ui64 = ipmib.ipIfStatsHCOutForwDatagrams;
14087 ipkp->inUnknownProtos.value.ui32 = ipmib.ipIfStatsInUnknownProtos;
14088 ipkp->inDiscards.value.ui32 = ipmib.ipIfStatsInDiscards;
14089 ipkp->inDelivers.value.ui64 = ipmib.ipIfStatsHCInDelivers;
14090 ipkp->outRequests.value.ui64 = ipmib.ipIfStatsHCOutRequests;
14091 ipkp->outDiscards.value.ui32 = ipmib.ipIfStatsOutDiscards;
14092 ipkp->outNoRoutes.value.ui32 = ipmib.ipIfStatsOutNoRoutes;
14093 ipkp->reasmTimeout.value.ui32 = ipst->ips_ip_reassembly_timeout;
14094 ipkp->reasmReqds.value.ui32 = ipmib.ipIfStatsReasmReqds;
14095 ipkp->reasmOKs.value.ui32 = ipmib.ipIfStatsReasmOKs;
14096 ipkp->reasmFails.value.ui32 = ipmib.ipIfStatsReasmFails;
14097 ipkp->fragOKs.value.ui32 = ipmib.ipIfStatsOutFragOKs;
14098 ipkp->fragFails.value.ui32 = ipmib.ipIfStatsOutFragFails;
14099 ipkp->fragCreates.value.ui32 = ipmib.ipIfStatsOutFragCreates;
14100
14101 ipkp->routingDiscards.value.ui32 = 0;
14102 ipkp->inErrs.value.ui32 = ipmib.tcpIfStatsInErrs;
14103 ipkp->noPorts.value.ui32 = ipmib.udpIfStatsNoPorts;
14104 ipkp->inCksumErrs.value.ui32 = ipmib.ipIfStatsInCksumErrs;
14105 ipkp->reasmDuplicates.value.ui32 = ipmib.ipIfStatsReasmDuplicates;
14106 ipkp->reasmPartDups.value.ui32 = ipmib.ipIfStatsReasmPartDups;
14107 ipkp->forwProhibits.value.ui32 = ipmib.ipIfStatsForwProhibits;
14108 ipkp->udpInCksumErrs.value.ui32 = ipmib.udpIfStatsInCksumErrs;
14109 ipkp->udpInOverflows.value.ui32 = ipmib.udpIfStatsInOverflows;
14110 ipkp->rawipInOverflows.value.ui32 = ipmib.rawipIfStatsInOverflows;
14111 ipkp->ipsecInSucceeded.value.ui32 = ipmib.ipsecIfStatsInSucceeded;
14112 ipkp->ipsecInFailed.value.i32 = ipmib.ipsecIfStatsInFailed;
14113
14114 ipkp->inIPv6.value.ui32 = ipmib.ipIfStatsInWrongIPVersion;
14115 ipkp->outIPv6.value.ui32 = ipmib.ipIfStatsOutWrongIPVersion;
14116 ipkp->outSwitchIPv6.value.ui32 = ipmib.ipIfStatsOutSwitchIPVersion;
14117
14118 netstack_rele(ns);
14119
14120 return (0);
14121 }
14122
14123 static void *
14124 icmp_kstat_init(netstackid_t stackid)
14125 {
14126 kstat_t *ksp;
14127
14128 icmp_named_kstat_t template = {
14129 { "inMsgs", KSTAT_DATA_UINT32 },
14130 { "inErrors", KSTAT_DATA_UINT32 },
14131 { "inDestUnreachs", KSTAT_DATA_UINT32 },
14132 { "inTimeExcds", KSTAT_DATA_UINT32 },
14133 { "inParmProbs", KSTAT_DATA_UINT32 },
14134 { "inSrcQuenchs", KSTAT_DATA_UINT32 },
14135 { "inRedirects", KSTAT_DATA_UINT32 },
14136 { "inEchos", KSTAT_DATA_UINT32 },
14137 { "inEchoReps", KSTAT_DATA_UINT32 },
14138 { "inTimestamps", KSTAT_DATA_UINT32 },
14139 { "inTimestampReps", KSTAT_DATA_UINT32 },
14140 { "inAddrMasks", KSTAT_DATA_UINT32 },
14141 { "inAddrMaskReps", KSTAT_DATA_UINT32 },
14142 { "outMsgs", KSTAT_DATA_UINT32 },
14143 { "outErrors", KSTAT_DATA_UINT32 },
14144 { "outDestUnreachs", KSTAT_DATA_UINT32 },
14145 { "outTimeExcds", KSTAT_DATA_UINT32 },
14146 { "outParmProbs", KSTAT_DATA_UINT32 },
14147 { "outSrcQuenchs", KSTAT_DATA_UINT32 },
14148 { "outRedirects", KSTAT_DATA_UINT32 },
14149 { "outEchos", KSTAT_DATA_UINT32 },
14150 { "outEchoReps", KSTAT_DATA_UINT32 },
14151 { "outTimestamps", KSTAT_DATA_UINT32 },
14152 { "outTimestampReps", KSTAT_DATA_UINT32 },
14153 { "outAddrMasks", KSTAT_DATA_UINT32 },
14154 { "outAddrMaskReps", KSTAT_DATA_UINT32 },
14155 { "inChksumErrs", KSTAT_DATA_UINT32 },
14156 { "inUnknowns", KSTAT_DATA_UINT32 },
14157 { "inFragNeeded", KSTAT_DATA_UINT32 },
14158 { "outFragNeeded", KSTAT_DATA_UINT32 },
14159 { "outDrops", KSTAT_DATA_UINT32 },
14160 { "inOverFlows", KSTAT_DATA_UINT32 },
14161 { "inBadRedirects", KSTAT_DATA_UINT32 },
14162 };
14163
14164 ksp = kstat_create_netstack("ip", 0, "icmp", "mib2", KSTAT_TYPE_NAMED,
14165 NUM_OF_FIELDS(icmp_named_kstat_t), 0, stackid);
14166 if (ksp == NULL || ksp->ks_data == NULL)
14167 return (NULL);
14168
14169 bcopy(&template, ksp->ks_data, sizeof (template));
14170
14171 ksp->ks_update = icmp_kstat_update;
14172 ksp->ks_private = (void *)(uintptr_t)stackid;
14173
14174 kstat_install(ksp);
14175 return (ksp);
14176 }
14177
14178 static void
14179 icmp_kstat_fini(netstackid_t stackid, kstat_t *ksp)
14180 {
14181 if (ksp != NULL) {
14182 ASSERT(stackid == (netstackid_t)(uintptr_t)ksp->ks_private);
14183 kstat_delete_netstack(ksp, stackid);
14184 }
14185 }
14186
14187 static int
14188 icmp_kstat_update(kstat_t *kp, int rw)
14189 {
14190 icmp_named_kstat_t *icmpkp;
14191 netstackid_t stackid = (zoneid_t)(uintptr_t)kp->ks_private;
14192 netstack_t *ns;
14193 ip_stack_t *ipst;
14194
14195 if ((kp == NULL) || (kp->ks_data == NULL))
14196 return (EIO);
14197
14198 if (rw == KSTAT_WRITE)
14199 return (EACCES);
14200
14201 ns = netstack_find_by_stackid(stackid);
14202 if (ns == NULL)
14203 return (-1);
14204 ipst = ns->netstack_ip;
14205 if (ipst == NULL) {
14206 netstack_rele(ns);
14207 return (-1);
14208 }
14209 icmpkp = (icmp_named_kstat_t *)kp->ks_data;
14210
14211 icmpkp->inMsgs.value.ui32 = ipst->ips_icmp_mib.icmpInMsgs;
14212 icmpkp->inErrors.value.ui32 = ipst->ips_icmp_mib.icmpInErrors;
14213 icmpkp->inDestUnreachs.value.ui32 =
14214 ipst->ips_icmp_mib.icmpInDestUnreachs;
14215 icmpkp->inTimeExcds.value.ui32 = ipst->ips_icmp_mib.icmpInTimeExcds;
14216 icmpkp->inParmProbs.value.ui32 = ipst->ips_icmp_mib.icmpInParmProbs;
14217 icmpkp->inSrcQuenchs.value.ui32 = ipst->ips_icmp_mib.icmpInSrcQuenchs;
14218 icmpkp->inRedirects.value.ui32 = ipst->ips_icmp_mib.icmpInRedirects;
14219 icmpkp->inEchos.value.ui32 = ipst->ips_icmp_mib.icmpInEchos;
14220 icmpkp->inEchoReps.value.ui32 = ipst->ips_icmp_mib.icmpInEchoReps;
14221 icmpkp->inTimestamps.value.ui32 = ipst->ips_icmp_mib.icmpInTimestamps;
14222 icmpkp->inTimestampReps.value.ui32 =
14223 ipst->ips_icmp_mib.icmpInTimestampReps;
14224 icmpkp->inAddrMasks.value.ui32 = ipst->ips_icmp_mib.icmpInAddrMasks;
14225 icmpkp->inAddrMaskReps.value.ui32 =
14226 ipst->ips_icmp_mib.icmpInAddrMaskReps;
14227 icmpkp->outMsgs.value.ui32 = ipst->ips_icmp_mib.icmpOutMsgs;
14228 icmpkp->outErrors.value.ui32 = ipst->ips_icmp_mib.icmpOutErrors;
14229 icmpkp->outDestUnreachs.value.ui32 =
14230 ipst->ips_icmp_mib.icmpOutDestUnreachs;
14231 icmpkp->outTimeExcds.value.ui32 = ipst->ips_icmp_mib.icmpOutTimeExcds;
14232 icmpkp->outParmProbs.value.ui32 = ipst->ips_icmp_mib.icmpOutParmProbs;
14233 icmpkp->outSrcQuenchs.value.ui32 =
14234 ipst->ips_icmp_mib.icmpOutSrcQuenchs;
14235 icmpkp->outRedirects.value.ui32 = ipst->ips_icmp_mib.icmpOutRedirects;
14236 icmpkp->outEchos.value.ui32 = ipst->ips_icmp_mib.icmpOutEchos;
14237 icmpkp->outEchoReps.value.ui32 = ipst->ips_icmp_mib.icmpOutEchoReps;
14238 icmpkp->outTimestamps.value.ui32 =
14239 ipst->ips_icmp_mib.icmpOutTimestamps;
14240 icmpkp->outTimestampReps.value.ui32 =
14241 ipst->ips_icmp_mib.icmpOutTimestampReps;
14242 icmpkp->outAddrMasks.value.ui32 =
14243 ipst->ips_icmp_mib.icmpOutAddrMasks;
14244 icmpkp->outAddrMaskReps.value.ui32 =
14245 ipst->ips_icmp_mib.icmpOutAddrMaskReps;
14246 icmpkp->inCksumErrs.value.ui32 = ipst->ips_icmp_mib.icmpInCksumErrs;
14247 icmpkp->inUnknowns.value.ui32 = ipst->ips_icmp_mib.icmpInUnknowns;
14248 icmpkp->inFragNeeded.value.ui32 = ipst->ips_icmp_mib.icmpInFragNeeded;
14249 icmpkp->outFragNeeded.value.ui32 =
14250 ipst->ips_icmp_mib.icmpOutFragNeeded;
14251 icmpkp->outDrops.value.ui32 = ipst->ips_icmp_mib.icmpOutDrops;
14252 icmpkp->inOverflows.value.ui32 = ipst->ips_icmp_mib.icmpInOverflows;
14253 icmpkp->inBadRedirects.value.ui32 =
14254 ipst->ips_icmp_mib.icmpInBadRedirects;
14255
14256 netstack_rele(ns);
14257 return (0);
14258 }
14259
14260 /*
14261 * This is the fanout function for raw socket opened for SCTP. Note
14262 * that it is called after SCTP checks that there is no socket which
14263 * wants a packet. Then before SCTP handles this out of the blue packet,
14264 * this function is called to see if there is any raw socket for SCTP.
14265 * If there is and it is bound to the correct address, the packet will
14266 * be sent to that socket. Note that only one raw socket can be bound to
14267 * a port. This is assured in ipcl_sctp_hash_insert();
14268 */
14269 void
14270 ip_fanout_sctp_raw(mblk_t *mp, ipha_t *ipha, ip6_t *ip6h, uint32_t ports,
14271 ip_recv_attr_t *ira)
14272 {
14273 conn_t *connp;
14274 queue_t *rq;
14275 boolean_t secure;
14276 ill_t *ill = ira->ira_ill;
14277 ip_stack_t *ipst = ill->ill_ipst;
14278 ipsec_stack_t *ipss = ipst->ips_netstack->netstack_ipsec;
14279 sctp_stack_t *sctps = ipst->ips_netstack->netstack_sctp;
14280 iaflags_t iraflags = ira->ira_flags;
14281 ill_t *rill = ira->ira_rill;
14282
14283 secure = iraflags & IRAF_IPSEC_SECURE;
14284
14285 connp = ipcl_classify_raw(mp, IPPROTO_SCTP, ports, ipha, ip6h,
14286 ira, ipst);
14287 if (connp == NULL) {
14288 /*
14289 * Although raw sctp is not summed, OOB chunks must be.
14290 * Drop the packet here if the sctp checksum failed.
14291 */
14292 if (iraflags & IRAF_SCTP_CSUM_ERR) {
14293 SCTPS_BUMP_MIB(sctps, sctpChecksumError);
14294 freemsg(mp);
14295 return;
14296 }
14297 ira->ira_ill = ira->ira_rill = NULL;
14298 sctp_ootb_input(mp, ira, ipst);
14299 ira->ira_ill = ill;
14300 ira->ira_rill = rill;
14301 return;
14302 }
14303 rq = connp->conn_rq;
14304 if (IPCL_IS_NONSTR(connp) ? connp->conn_flow_cntrld : !canputnext(rq)) {
14305 CONN_DEC_REF(connp);
14306 BUMP_MIB(ill->ill_ip_mib, rawipIfStatsInOverflows);
14307 freemsg(mp);
14308 return;
14309 }
14310 if (((iraflags & IRAF_IS_IPV4) ?
14311 CONN_INBOUND_POLICY_PRESENT(connp, ipss) :
14312 CONN_INBOUND_POLICY_PRESENT_V6(connp, ipss)) ||
14313 secure) {
14314 mp = ipsec_check_inbound_policy(mp, connp, ipha,
14315 ip6h, ira);
14316 if (mp == NULL) {
14317 BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards);
14318 /* Note that mp is NULL */
14319 ip_drop_input("ipIfStatsInDiscards", mp, ill);
14320 CONN_DEC_REF(connp);
14321 return;
14322 }
14323 }
14324
14325 if (iraflags & IRAF_ICMP_ERROR) {
14326 (connp->conn_recvicmp)(connp, mp, NULL, ira);
14327 } else {
14328 ill_t *rill = ira->ira_rill;
14329
14330 BUMP_MIB(ill->ill_ip_mib, ipIfStatsHCInDelivers);
14331 /* This is the SOCK_RAW, IPPROTO_SCTP case. */
14332 ira->ira_ill = ira->ira_rill = NULL;
14333 (connp->conn_recv)(connp, mp, NULL, ira);
14334 ira->ira_ill = ill;
14335 ira->ira_rill = rill;
14336 }
14337 CONN_DEC_REF(connp);
14338 }
14339
14340 /*
14341 * Free a packet that has the link-layer dl_unitdata_req_t or fast-path
14342 * header before the ip payload.
14343 */
14344 static void
14345 ip_xmit_flowctl_drop(ill_t *ill, mblk_t *mp, boolean_t is_fp_mp, int fp_mp_len)
14346 {
14347 int len = (mp->b_wptr - mp->b_rptr);
14348 mblk_t *ip_mp;
14349
14350 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutDiscards);
14351 if (is_fp_mp || len != fp_mp_len) {
14352 if (len > fp_mp_len) {
14353 /*
14354 * fastpath header and ip header in the first mblk
14355 */
14356 mp->b_rptr += fp_mp_len;
14357 } else {
14358 /*
14359 * ip_xmit_attach_llhdr had to prepend an mblk to
14360 * attach the fastpath header before ip header.
14361 */
14362 ip_mp = mp->b_cont;
14363 freeb(mp);
14364 mp = ip_mp;
14365 mp->b_rptr += (fp_mp_len - len);
14366 }
14367 } else {
14368 ip_mp = mp->b_cont;
14369 freeb(mp);
14370 mp = ip_mp;
14371 }
14372 ip_drop_output("ipIfStatsOutDiscards - flow ctl", mp, ill);
14373 freemsg(mp);
14374 }
14375
14376 /*
14377 * Normal post fragmentation function.
14378 *
14379 * Send a packet using the passed in nce. This handles both IPv4 and IPv6
14380 * using the same state machine.
14381 *
14382 * We return an error on failure. In particular we return EWOULDBLOCK
14383 * when the driver flow controls. In that case this ensures that ip_wsrv runs
14384 * (currently by canputnext failure resulting in backenabling from GLD.)
14385 * This allows the callers of conn_ip_output() to use EWOULDBLOCK as an
14386 * indication that they can flow control until ip_wsrv() tells then to restart.
14387 *
14388 * If the nce passed by caller is incomplete, this function
14389 * queues the packet and if necessary, sends ARP request and bails.
14390 * If the Neighbor Cache passed is fully resolved, we simply prepend
14391 * the link-layer header to the packet, do ipsec hw acceleration
14392 * work if necessary, and send the packet out on the wire.
14393 */
14394 /* ARGSUSED6 */
14395 int
14396 ip_xmit(mblk_t *mp, nce_t *nce, iaflags_t ixaflags, uint_t pkt_len,
14397 uint32_t xmit_hint, zoneid_t szone, zoneid_t nolzid, uintptr_t *ixacookie)
14398 {
14399 queue_t *wq;
14400 ill_t *ill = nce->nce_ill;
14401 ip_stack_t *ipst = ill->ill_ipst;
14402 uint64_t delta;
14403 boolean_t isv6 = ill->ill_isv6;
14404 boolean_t fp_mp;
14405 ncec_t *ncec = nce->nce_common;
14406 int64_t now = LBOLT_FASTPATH64;
14407 boolean_t is_probe;
14408
14409 DTRACE_PROBE1(ip__xmit, nce_t *, nce);
14410
14411 ASSERT(mp != NULL);
14412 ASSERT(mp->b_datap->db_type == M_DATA);
14413 ASSERT(pkt_len == msgdsize(mp));
14414
14415 /*
14416 * If we have already been here and are coming back after ARP/ND.
14417 * the IXAF_NO_TRACE flag is set. We skip FW_HOOKS, DTRACE and ipobs
14418 * in that case since they have seen the packet when it came here
14419 * the first time.
14420 */
14421 if (ixaflags & IXAF_NO_TRACE)
14422 goto sendit;
14423
14424 if (ixaflags & IXAF_IS_IPV4) {
14425 ipha_t *ipha = (ipha_t *)mp->b_rptr;
14426
14427 ASSERT(!isv6);
14428 ASSERT(pkt_len == ntohs(((ipha_t *)mp->b_rptr)->ipha_length));
14429 if (HOOKS4_INTERESTED_PHYSICAL_OUT(ipst) &&
14430 !(ixaflags & IXAF_NO_PFHOOK)) {
14431 int error;
14432
14433 FW_HOOKS(ipst->ips_ip4_physical_out_event,
14434 ipst->ips_ipv4firewall_physical_out,
14435 NULL, ill, ipha, mp, mp, 0, ipst, error);
14436 DTRACE_PROBE1(ip4__physical__out__end,
14437 mblk_t *, mp);
14438 if (mp == NULL)
14439 return (error);
14440
14441 /* The length could have changed */
14442 pkt_len = msgdsize(mp);
14443 }
14444 if (ipst->ips_ip4_observe.he_interested) {
14445 /*
14446 * Note that for TX the zoneid is the sending
14447 * zone, whether or not MLP is in play.
14448 * Since the szone argument is the IP zoneid (i.e.,
14449 * zero for exclusive-IP zones) and ipobs wants
14450 * the system zoneid, we map it here.
14451 */
14452 szone = IP_REAL_ZONEID(szone, ipst);
14453
14454 /*
14455 * On the outbound path the destination zone will be
14456 * unknown as we're sending this packet out on the
14457 * wire.
14458 */
14459 ipobs_hook(mp, IPOBS_HOOK_OUTBOUND, szone, ALL_ZONES,
14460 ill, ipst);
14461 }
14462 DTRACE_IP7(send, mblk_t *, mp, conn_t *, NULL,
14463 void_ip_t *, ipha, __dtrace_ipsr_ill_t *, ill,
14464 ipha_t *, ipha, ip6_t *, NULL, int, 0);
14465 } else {
14466 ip6_t *ip6h = (ip6_t *)mp->b_rptr;
14467
14468 ASSERT(isv6);
14469 ASSERT(pkt_len ==
14470 ntohs(((ip6_t *)mp->b_rptr)->ip6_plen) + IPV6_HDR_LEN);
14471 if (HOOKS6_INTERESTED_PHYSICAL_OUT(ipst) &&
14472 !(ixaflags & IXAF_NO_PFHOOK)) {
14473 int error;
14474
14475 FW_HOOKS6(ipst->ips_ip6_physical_out_event,
14476 ipst->ips_ipv6firewall_physical_out,
14477 NULL, ill, ip6h, mp, mp, 0, ipst, error);
14478 DTRACE_PROBE1(ip6__physical__out__end,
14479 mblk_t *, mp);
14480 if (mp == NULL)
14481 return (error);
14482
14483 /* The length could have changed */
14484 pkt_len = msgdsize(mp);
14485 }
14486 if (ipst->ips_ip6_observe.he_interested) {
14487 /* See above */
14488 szone = IP_REAL_ZONEID(szone, ipst);
14489
14490 ipobs_hook(mp, IPOBS_HOOK_OUTBOUND, szone, ALL_ZONES,
14491 ill, ipst);
14492 }
14493 DTRACE_IP7(send, mblk_t *, mp, conn_t *, NULL,
14494 void_ip_t *, ip6h, __dtrace_ipsr_ill_t *, ill,
14495 ipha_t *, NULL, ip6_t *, ip6h, int, 0);
14496 }
14497
14498 sendit:
14499 /*
14500 * We check the state without a lock because the state can never
14501 * move "backwards" to initial or incomplete.
14502 */
14503 switch (ncec->ncec_state) {
14504 case ND_REACHABLE:
14505 case ND_STALE:
14506 case ND_DELAY:
14507 case ND_PROBE:
14508 mp = ip_xmit_attach_llhdr(mp, nce);
14509 if (mp == NULL) {
14510 /*
14511 * ip_xmit_attach_llhdr has increased
14512 * ipIfStatsOutDiscards and called ip_drop_output()
14513 */
14514 return (ENOBUFS);
14515 }
14516 /*
14517 * check if nce_fastpath completed and we tagged on a
14518 * copy of nce_fp_mp in ip_xmit_attach_llhdr().
14519 */
14520 fp_mp = (mp->b_datap->db_type == M_DATA);
14521
14522 if (fp_mp &&
14523 (ill->ill_capabilities & ILL_CAPAB_DLD_DIRECT)) {
14524 ill_dld_direct_t *idd;
14525
14526 idd = &ill->ill_dld_capab->idc_direct;
14527 /*
14528 * Send the packet directly to DLD, where it
14529 * may be queued depending on the availability
14530 * of transmit resources at the media layer.
14531 * Return value should be taken into
14532 * account and flow control the TCP.
14533 */
14534 BUMP_MIB(ill->ill_ip_mib, ipIfStatsHCOutTransmits);
14535 UPDATE_MIB(ill->ill_ip_mib, ipIfStatsHCOutOctets,
14536 pkt_len);
14537
14538 if (ixaflags & IXAF_NO_DEV_FLOW_CTL) {
14539 (void) idd->idd_tx_df(idd->idd_tx_dh, mp,
14540 (uintptr_t)xmit_hint, IP_DROP_ON_NO_DESC);
14541 } else {
14542 uintptr_t cookie;
14543
14544 if ((cookie = idd->idd_tx_df(idd->idd_tx_dh,
14545 mp, (uintptr_t)xmit_hint, 0)) != 0) {
14546 if (ixacookie != NULL)
14547 *ixacookie = cookie;
14548 return (EWOULDBLOCK);
14549 }
14550 }
14551 } else {
14552 wq = ill->ill_wq;
14553
14554 if (!(ixaflags & IXAF_NO_DEV_FLOW_CTL) &&
14555 !canputnext(wq)) {
14556 if (ixacookie != NULL)
14557 *ixacookie = 0;
14558 ip_xmit_flowctl_drop(ill, mp, fp_mp,
14559 nce->nce_fp_mp != NULL ?
14560 MBLKL(nce->nce_fp_mp) : 0);
14561 return (EWOULDBLOCK);
14562 }
14563 BUMP_MIB(ill->ill_ip_mib, ipIfStatsHCOutTransmits);
14564 UPDATE_MIB(ill->ill_ip_mib, ipIfStatsHCOutOctets,
14565 pkt_len);
14566 putnext(wq, mp);
14567 }
14568
14569 /*
14570 * The rest of this function implements Neighbor Unreachability
14571 * detection. Determine if the ncec is eligible for NUD.
14572 */
14573 if (ncec->ncec_flags & NCE_F_NONUD)
14574 return (0);
14575
14576 ASSERT(ncec->ncec_state != ND_INCOMPLETE);
14577
14578 /*
14579 * Check for upper layer advice
14580 */
14581 if (ixaflags & IXAF_REACH_CONF) {
14582 timeout_id_t tid;
14583
14584 /*
14585 * It should be o.k. to check the state without
14586 * a lock here, at most we lose an advice.
14587 */
14588 ncec->ncec_last = TICK_TO_MSEC(now);
14589 if (ncec->ncec_state != ND_REACHABLE) {
14590 mutex_enter(&ncec->ncec_lock);
14591 ncec->ncec_state = ND_REACHABLE;
14592 tid = ncec->ncec_timeout_id;
14593 ncec->ncec_timeout_id = 0;
14594 mutex_exit(&ncec->ncec_lock);
14595 (void) untimeout(tid);
14596 if (ip_debug > 2) {
14597 /* ip1dbg */
14598 pr_addr_dbg("ip_xmit: state"
14599 " for %s changed to"
14600 " REACHABLE\n", AF_INET6,
14601 &ncec->ncec_addr);
14602 }
14603 }
14604 return (0);
14605 }
14606
14607 delta = TICK_TO_MSEC(now) - ncec->ncec_last;
14608 ip1dbg(("ip_xmit: delta = %" PRId64
14609 " ill_reachable_time = %d \n", delta,
14610 ill->ill_reachable_time));
14611 if (delta > (uint64_t)ill->ill_reachable_time) {
14612 mutex_enter(&ncec->ncec_lock);
14613 switch (ncec->ncec_state) {
14614 case ND_REACHABLE:
14615 ASSERT((ncec->ncec_flags & NCE_F_NONUD) == 0);
14616 /* FALLTHROUGH */
14617 case ND_STALE:
14618 /*
14619 * ND_REACHABLE is identical to
14620 * ND_STALE in this specific case. If
14621 * reachable time has expired for this
14622 * neighbor (delta is greater than
14623 * reachable time), conceptually, the
14624 * neighbor cache is no longer in
14625 * REACHABLE state, but already in
14626 * STALE state. So the correct
14627 * transition here is to ND_DELAY.
14628 */
14629 ncec->ncec_state = ND_DELAY;
14630 mutex_exit(&ncec->ncec_lock);
14631 nce_restart_timer(ncec,
14632 ipst->ips_delay_first_probe_time);
14633 if (ip_debug > 3) {
14634 /* ip2dbg */
14635 pr_addr_dbg("ip_xmit: state"
14636 " for %s changed to"
14637 " DELAY\n", AF_INET6,
14638 &ncec->ncec_addr);
14639 }
14640 break;
14641 case ND_DELAY:
14642 case ND_PROBE:
14643 mutex_exit(&ncec->ncec_lock);
14644 /* Timers have already started */
14645 break;
14646 case ND_UNREACHABLE:
14647 /*
14648 * nce_timer has detected that this ncec
14649 * is unreachable and initiated deleting
14650 * this ncec.
14651 * This is a harmless race where we found the
14652 * ncec before it was deleted and have
14653 * just sent out a packet using this
14654 * unreachable ncec.
14655 */
14656 mutex_exit(&ncec->ncec_lock);
14657 break;
14658 default:
14659 ASSERT(0);
14660 mutex_exit(&ncec->ncec_lock);
14661 }
14662 }
14663 return (0);
14664
14665 case ND_INCOMPLETE:
14666 /*
14667 * the state could have changed since we didn't hold the lock.
14668 * Re-verify state under lock.
14669 */
14670 is_probe = ipmp_packet_is_probe(mp, nce->nce_ill);
14671 mutex_enter(&ncec->ncec_lock);
14672 if (NCE_ISREACHABLE(ncec)) {
14673 mutex_exit(&ncec->ncec_lock);
14674 goto sendit;
14675 }
14676 /* queue the packet */
14677 nce_queue_mp(ncec, mp, is_probe);
14678 mutex_exit(&ncec->ncec_lock);
14679 DTRACE_PROBE2(ip__xmit__incomplete,
14680 (ncec_t *), ncec, (mblk_t *), mp);
14681 return (0);
14682
14683 case ND_INITIAL:
14684 /*
14685 * State could have changed since we didn't hold the lock, so
14686 * re-verify state.
14687 */
14688 is_probe = ipmp_packet_is_probe(mp, nce->nce_ill);
14689 mutex_enter(&ncec->ncec_lock);
14690 if (NCE_ISREACHABLE(ncec)) {
14691 mutex_exit(&ncec->ncec_lock);
14692 goto sendit;
14693 }
14694 nce_queue_mp(ncec, mp, is_probe);
14695 if (ncec->ncec_state == ND_INITIAL) {
14696 ncec->ncec_state = ND_INCOMPLETE;
14697 mutex_exit(&ncec->ncec_lock);
14698 /*
14699 * figure out the source we want to use
14700 * and resolve it.
14701 */
14702 ip_ndp_resolve(ncec);
14703 } else {
14704 mutex_exit(&ncec->ncec_lock);
14705 }
14706 return (0);
14707
14708 case ND_UNREACHABLE:
14709 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutDiscards);
14710 ip_drop_output("ipIfStatsOutDiscards - ND_UNREACHABLE",
14711 mp, ill);
14712 freemsg(mp);
14713 return (0);
14714
14715 default:
14716 ASSERT(0);
14717 BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutDiscards);
14718 ip_drop_output("ipIfStatsOutDiscards - ND_other",
14719 mp, ill);
14720 freemsg(mp);
14721 return (ENETUNREACH);
14722 }
14723 }
14724
14725 /*
14726 * Return B_TRUE if the buffers differ in length or content.
14727 * This is used for comparing extension header buffers.
14728 * Note that an extension header would be declared different
14729 * even if all that changed was the next header value in that header i.e.
14730 * what really changed is the next extension header.
14731 */
14732 boolean_t
14733 ip_cmpbuf(const void *abuf, uint_t alen, boolean_t b_valid, const void *bbuf,
14734 uint_t blen)
14735 {
14736 if (!b_valid)
14737 blen = 0;
14738
14739 if (alen != blen)
14740 return (B_TRUE);
14741 if (alen == 0)
14742 return (B_FALSE); /* Both zero length */
14743 return (bcmp(abuf, bbuf, alen));
14744 }
14745
14746 /*
14747 * Preallocate memory for ip_savebuf(). Returns B_TRUE if ok.
14748 * Return B_FALSE if memory allocation fails - don't change any state!
14749 */
14750 boolean_t
14751 ip_allocbuf(void **dstp, uint_t *dstlenp, boolean_t src_valid,
14752 const void *src, uint_t srclen)
14753 {
14754 void *dst;
14755
14756 if (!src_valid)
14757 srclen = 0;
14758
14759 ASSERT(*dstlenp == 0);
14760 if (src != NULL && srclen != 0) {
14761 dst = mi_alloc(srclen, BPRI_MED);
14762 if (dst == NULL)
14763 return (B_FALSE);
14764 } else {
14765 dst = NULL;
14766 }
14767 if (*dstp != NULL)
14768 mi_free(*dstp);
14769 *dstp = dst;
14770 *dstlenp = dst == NULL ? 0 : srclen;
14771 return (B_TRUE);
14772 }
14773
14774 /*
14775 * Replace what is in *dst, *dstlen with the source.
14776 * Assumes ip_allocbuf has already been called.
14777 */
14778 void
14779 ip_savebuf(void **dstp, uint_t *dstlenp, boolean_t src_valid,
14780 const void *src, uint_t srclen)
14781 {
14782 if (!src_valid)
14783 srclen = 0;
14784
14785 ASSERT(*dstlenp == srclen);
14786 if (src != NULL && srclen != 0)
14787 bcopy(src, *dstp, srclen);
14788 }
14789
14790 /*
14791 * Free the storage pointed to by the members of an ip_pkt_t.
14792 */
14793 void
14794 ip_pkt_free(ip_pkt_t *ipp)
14795 {
14796 uint_t fields = ipp->ipp_fields;
14797
14798 if (fields & IPPF_HOPOPTS) {
14799 kmem_free(ipp->ipp_hopopts, ipp->ipp_hopoptslen);
14800 ipp->ipp_hopopts = NULL;
14801 ipp->ipp_hopoptslen = 0;
14802 }
14803 if (fields & IPPF_RTHDRDSTOPTS) {
14804 kmem_free(ipp->ipp_rthdrdstopts, ipp->ipp_rthdrdstoptslen);
14805 ipp->ipp_rthdrdstopts = NULL;
14806 ipp->ipp_rthdrdstoptslen = 0;
14807 }
14808 if (fields & IPPF_DSTOPTS) {
14809 kmem_free(ipp->ipp_dstopts, ipp->ipp_dstoptslen);
14810 ipp->ipp_dstopts = NULL;
14811 ipp->ipp_dstoptslen = 0;
14812 }
14813 if (fields & IPPF_RTHDR) {
14814 kmem_free(ipp->ipp_rthdr, ipp->ipp_rthdrlen);
14815 ipp->ipp_rthdr = NULL;
14816 ipp->ipp_rthdrlen = 0;
14817 }
14818 if (fields & IPPF_IPV4_OPTIONS) {
14819 kmem_free(ipp->ipp_ipv4_options, ipp->ipp_ipv4_options_len);
14820 ipp->ipp_ipv4_options = NULL;
14821 ipp->ipp_ipv4_options_len = 0;
14822 }
14823 if (fields & IPPF_LABEL_V4) {
14824 kmem_free(ipp->ipp_label_v4, ipp->ipp_label_len_v4);
14825 ipp->ipp_label_v4 = NULL;
14826 ipp->ipp_label_len_v4 = 0;
14827 }
14828 if (fields & IPPF_LABEL_V6) {
14829 kmem_free(ipp->ipp_label_v6, ipp->ipp_label_len_v6);
14830 ipp->ipp_label_v6 = NULL;
14831 ipp->ipp_label_len_v6 = 0;
14832 }
14833 ipp->ipp_fields &= ~(IPPF_HOPOPTS | IPPF_RTHDRDSTOPTS | IPPF_DSTOPTS |
14834 IPPF_RTHDR | IPPF_IPV4_OPTIONS | IPPF_LABEL_V4 | IPPF_LABEL_V6);
14835 }
14836
14837 /*
14838 * Copy from src to dst and allocate as needed.
14839 * Returns zero or ENOMEM.
14840 *
14841 * The caller must initialize dst to zero.
14842 */
14843 int
14844 ip_pkt_copy(ip_pkt_t *src, ip_pkt_t *dst, int kmflag)
14845 {
14846 uint_t fields = src->ipp_fields;
14847
14848 /* Start with fields that don't require memory allocation */
14849 dst->ipp_fields = fields &
14850 ~(IPPF_HOPOPTS | IPPF_RTHDRDSTOPTS | IPPF_DSTOPTS |
14851 IPPF_RTHDR | IPPF_IPV4_OPTIONS | IPPF_LABEL_V4 | IPPF_LABEL_V6);
14852
14853 dst->ipp_addr = src->ipp_addr;
14854 dst->ipp_unicast_hops = src->ipp_unicast_hops;
14855 dst->ipp_hoplimit = src->ipp_hoplimit;
14856 dst->ipp_tclass = src->ipp_tclass;
14857 dst->ipp_type_of_service = src->ipp_type_of_service;
14858
14859 if (!(fields & (IPPF_HOPOPTS | IPPF_RTHDRDSTOPTS | IPPF_DSTOPTS |
14860 IPPF_RTHDR | IPPF_IPV4_OPTIONS | IPPF_LABEL_V4 | IPPF_LABEL_V6)))
14861 return (0);
14862
14863 if (fields & IPPF_HOPOPTS) {
14864 dst->ipp_hopopts = kmem_alloc(src->ipp_hopoptslen, kmflag);
14865 if (dst->ipp_hopopts == NULL) {
14866 ip_pkt_free(dst);
14867 return (ENOMEM);
14868 }
14869 dst->ipp_fields |= IPPF_HOPOPTS;
14870 bcopy(src->ipp_hopopts, dst->ipp_hopopts,
14871 src->ipp_hopoptslen);
14872 dst->ipp_hopoptslen = src->ipp_hopoptslen;
14873 }
14874 if (fields & IPPF_RTHDRDSTOPTS) {
14875 dst->ipp_rthdrdstopts = kmem_alloc(src->ipp_rthdrdstoptslen,
14876 kmflag);
14877 if (dst->ipp_rthdrdstopts == NULL) {
14878 ip_pkt_free(dst);
14879 return (ENOMEM);
14880 }
14881 dst->ipp_fields |= IPPF_RTHDRDSTOPTS;
14882 bcopy(src->ipp_rthdrdstopts, dst->ipp_rthdrdstopts,
14883 src->ipp_rthdrdstoptslen);
14884 dst->ipp_rthdrdstoptslen = src->ipp_rthdrdstoptslen;
14885 }
14886 if (fields & IPPF_DSTOPTS) {
14887 dst->ipp_dstopts = kmem_alloc(src->ipp_dstoptslen, kmflag);
14888 if (dst->ipp_dstopts == NULL) {
14889 ip_pkt_free(dst);
14890 return (ENOMEM);
14891 }
14892 dst->ipp_fields |= IPPF_DSTOPTS;
14893 bcopy(src->ipp_dstopts, dst->ipp_dstopts,
14894 src->ipp_dstoptslen);
14895 dst->ipp_dstoptslen = src->ipp_dstoptslen;
14896 }
14897 if (fields & IPPF_RTHDR) {
14898 dst->ipp_rthdr = kmem_alloc(src->ipp_rthdrlen, kmflag);
14899 if (dst->ipp_rthdr == NULL) {
14900 ip_pkt_free(dst);
14901 return (ENOMEM);
14902 }
14903 dst->ipp_fields |= IPPF_RTHDR;
14904 bcopy(src->ipp_rthdr, dst->ipp_rthdr,
14905 src->ipp_rthdrlen);
14906 dst->ipp_rthdrlen = src->ipp_rthdrlen;
14907 }
14908 if (fields & IPPF_IPV4_OPTIONS) {
14909 dst->ipp_ipv4_options = kmem_alloc(src->ipp_ipv4_options_len,
14910 kmflag);
14911 if (dst->ipp_ipv4_options == NULL) {
14912 ip_pkt_free(dst);
14913 return (ENOMEM);
14914 }
14915 dst->ipp_fields |= IPPF_IPV4_OPTIONS;
14916 bcopy(src->ipp_ipv4_options, dst->ipp_ipv4_options,
14917 src->ipp_ipv4_options_len);
14918 dst->ipp_ipv4_options_len = src->ipp_ipv4_options_len;
14919 }
14920 if (fields & IPPF_LABEL_V4) {
14921 dst->ipp_label_v4 = kmem_alloc(src->ipp_label_len_v4, kmflag);
14922 if (dst->ipp_label_v4 == NULL) {
14923 ip_pkt_free(dst);
14924 return (ENOMEM);
14925 }
14926 dst->ipp_fields |= IPPF_LABEL_V4;
14927 bcopy(src->ipp_label_v4, dst->ipp_label_v4,
14928 src->ipp_label_len_v4);
14929 dst->ipp_label_len_v4 = src->ipp_label_len_v4;
14930 }
14931 if (fields & IPPF_LABEL_V6) {
14932 dst->ipp_label_v6 = kmem_alloc(src->ipp_label_len_v6, kmflag);
14933 if (dst->ipp_label_v6 == NULL) {
14934 ip_pkt_free(dst);
14935 return (ENOMEM);
14936 }
14937 dst->ipp_fields |= IPPF_LABEL_V6;
14938 bcopy(src->ipp_label_v6, dst->ipp_label_v6,
14939 src->ipp_label_len_v6);
14940 dst->ipp_label_len_v6 = src->ipp_label_len_v6;
14941 }
14942 if (fields & IPPF_FRAGHDR) {
14943 dst->ipp_fraghdr = kmem_alloc(src->ipp_fraghdrlen, kmflag);
14944 if (dst->ipp_fraghdr == NULL) {
14945 ip_pkt_free(dst);
14946 return (ENOMEM);
14947 }
14948 dst->ipp_fields |= IPPF_FRAGHDR;
14949 bcopy(src->ipp_fraghdr, dst->ipp_fraghdr,
14950 src->ipp_fraghdrlen);
14951 dst->ipp_fraghdrlen = src->ipp_fraghdrlen;
14952 }
14953 return (0);
14954 }
14955
14956 /*
14957 * Returns INADDR_ANY if no source route
14958 */
14959 ipaddr_t
14960 ip_pkt_source_route_v4(const ip_pkt_t *ipp)
14961 {
14962 ipaddr_t nexthop = INADDR_ANY;
14963 ipoptp_t opts;
14964 uchar_t *opt;
14965 uint8_t optval;
14966 uint8_t optlen;
14967 uint32_t totallen;
14968
14969 if (!(ipp->ipp_fields & IPPF_IPV4_OPTIONS))
14970 return (INADDR_ANY);
14971
14972 totallen = ipp->ipp_ipv4_options_len;
14973 if (totallen & 0x3)
14974 return (INADDR_ANY);
14975
14976 for (optval = ipoptp_first2(&opts, totallen, ipp->ipp_ipv4_options);
14977 optval != IPOPT_EOL;
14978 optval = ipoptp_next(&opts)) {
14979 opt = opts.ipoptp_cur;
14980 switch (optval) {
14981 uint8_t off;
14982 case IPOPT_SSRR:
14983 case IPOPT_LSRR:
14984 if ((opts.ipoptp_flags & IPOPTP_ERROR) != 0) {
14985 break;
14986 }
14987 optlen = opts.ipoptp_len;
14988 off = opt[IPOPT_OFFSET];
14989 off--;
14990 if (optlen < IP_ADDR_LEN ||
14991 off > optlen - IP_ADDR_LEN) {
14992 /* End of source route */
14993 break;
14994 }
14995 bcopy((char *)opt + off, &nexthop, IP_ADDR_LEN);
14996 if (nexthop == htonl(INADDR_LOOPBACK)) {
14997 /* Ignore */
14998 nexthop = INADDR_ANY;
14999 break;
15000 }
15001 break;
15002 }
15003 }
15004 return (nexthop);
15005 }
15006
15007 /*
15008 * Reverse a source route.
15009 */
15010 void
15011 ip_pkt_source_route_reverse_v4(ip_pkt_t *ipp)
15012 {
15013 ipaddr_t tmp;
15014 ipoptp_t opts;
15015 uchar_t *opt;
15016 uint8_t optval;
15017 uint32_t totallen;
15018
15019 if (!(ipp->ipp_fields & IPPF_IPV4_OPTIONS))
15020 return;
15021
15022 totallen = ipp->ipp_ipv4_options_len;
15023 if (totallen & 0x3)
15024 return;
15025
15026 for (optval = ipoptp_first2(&opts, totallen, ipp->ipp_ipv4_options);
15027 optval != IPOPT_EOL;
15028 optval = ipoptp_next(&opts)) {
15029 uint8_t off1, off2;
15030
15031 opt = opts.ipoptp_cur;
15032 switch (optval) {
15033 case IPOPT_SSRR:
15034 case IPOPT_LSRR:
15035 if ((opts.ipoptp_flags & IPOPTP_ERROR) != 0) {
15036 break;
15037 }
15038 off1 = IPOPT_MINOFF_SR - 1;
15039 off2 = opt[IPOPT_OFFSET] - IP_ADDR_LEN - 1;
15040 while (off2 > off1) {
15041 bcopy(opt + off2, &tmp, IP_ADDR_LEN);
15042 bcopy(opt + off1, opt + off2, IP_ADDR_LEN);
15043 bcopy(&tmp, opt + off2, IP_ADDR_LEN);
15044 off2 -= IP_ADDR_LEN;
15045 off1 += IP_ADDR_LEN;
15046 }
15047 opt[IPOPT_OFFSET] = IPOPT_MINOFF_SR;
15048 break;
15049 }
15050 }
15051 }
15052
15053 /*
15054 * Returns NULL if no routing header
15055 */
15056 in6_addr_t *
15057 ip_pkt_source_route_v6(const ip_pkt_t *ipp)
15058 {
15059 in6_addr_t *nexthop = NULL;
15060 ip6_rthdr0_t *rthdr;
15061
15062 if (!(ipp->ipp_fields & IPPF_RTHDR))
15063 return (NULL);
15064
15065 rthdr = (ip6_rthdr0_t *)ipp->ipp_rthdr;
15066 if (rthdr->ip6r0_segleft == 0)
15067 return (NULL);
15068
15069 nexthop = (in6_addr_t *)((char *)rthdr + sizeof (*rthdr));
15070 return (nexthop);
15071 }
15072
15073 zoneid_t
15074 ip_get_zoneid_v4(ipaddr_t addr, mblk_t *mp, ip_recv_attr_t *ira,
15075 zoneid_t lookup_zoneid)
15076 {
15077 ip_stack_t *ipst = ira->ira_ill->ill_ipst;
15078 ire_t *ire;
15079 int ire_flags = MATCH_IRE_TYPE;
15080 zoneid_t zoneid = ALL_ZONES;
15081
15082 if (is_system_labeled() && !tsol_can_accept_raw(mp, ira, B_FALSE))
15083 return (ALL_ZONES);
15084
15085 if (lookup_zoneid != ALL_ZONES)
15086 ire_flags |= MATCH_IRE_ZONEONLY;
15087 ire = ire_ftable_lookup_v4(addr, NULL, NULL, IRE_LOCAL | IRE_LOOPBACK,
15088 NULL, lookup_zoneid, NULL, ire_flags, 0, ipst, NULL);
15089 if (ire != NULL) {
15090 zoneid = IP_REAL_ZONEID(ire->ire_zoneid, ipst);
15091 ire_refrele(ire);
15092 }
15093 return (zoneid);
15094 }
15095
15096 zoneid_t
15097 ip_get_zoneid_v6(in6_addr_t *addr, mblk_t *mp, const ill_t *ill,
15098 ip_recv_attr_t *ira, zoneid_t lookup_zoneid)
15099 {
15100 ip_stack_t *ipst = ira->ira_ill->ill_ipst;
15101 ire_t *ire;
15102 int ire_flags = MATCH_IRE_TYPE;
15103 zoneid_t zoneid = ALL_ZONES;
15104
15105 if (is_system_labeled() && !tsol_can_accept_raw(mp, ira, B_FALSE))
15106 return (ALL_ZONES);
15107
15108 if (IN6_IS_ADDR_LINKLOCAL(addr))
15109 ire_flags |= MATCH_IRE_ILL;
15110
15111 if (lookup_zoneid != ALL_ZONES)
15112 ire_flags |= MATCH_IRE_ZONEONLY;
15113 ire = ire_ftable_lookup_v6(addr, NULL, NULL, IRE_LOCAL | IRE_LOOPBACK,
15114 ill, lookup_zoneid, NULL, ire_flags, 0, ipst, NULL);
15115 if (ire != NULL) {
15116 zoneid = IP_REAL_ZONEID(ire->ire_zoneid, ipst);
15117 ire_refrele(ire);
15118 }
15119 return (zoneid);
15120 }
15121
15122 /*
15123 * IP obserability hook support functions.
15124 */
15125 static void
15126 ipobs_init(ip_stack_t *ipst)
15127 {
15128 netid_t id;
15129
15130 id = net_getnetidbynetstackid(ipst->ips_netstack->netstack_stackid);
15131
15132 ipst->ips_ip4_observe_pr = net_protocol_lookup(id, NHF_INET);
15133 VERIFY(ipst->ips_ip4_observe_pr != NULL);
15134
15135 ipst->ips_ip6_observe_pr = net_protocol_lookup(id, NHF_INET6);
15136 VERIFY(ipst->ips_ip6_observe_pr != NULL);
15137 }
15138
15139 static void
15140 ipobs_fini(ip_stack_t *ipst)
15141 {
15142
15143 VERIFY(net_protocol_release(ipst->ips_ip4_observe_pr) == 0);
15144 VERIFY(net_protocol_release(ipst->ips_ip6_observe_pr) == 0);
15145 }
15146
15147 /*
15148 * hook_pkt_observe_t is composed in network byte order so that the
15149 * entire mblk_t chain handed into hook_run can be used as-is.
15150 * The caveat is that use of the fields, such as the zone fields,
15151 * requires conversion into host byte order first.
15152 */
15153 void
15154 ipobs_hook(mblk_t *mp, int htype, zoneid_t zsrc, zoneid_t zdst,
15155 const ill_t *ill, ip_stack_t *ipst)
15156 {
15157 hook_pkt_observe_t *hdr;
15158 uint64_t grifindex;
15159 mblk_t *imp;
15160
15161 imp = allocb(sizeof (*hdr), BPRI_HI);
15162 if (imp == NULL)
15163 return;
15164
15165 hdr = (hook_pkt_observe_t *)imp->b_rptr;
15166 /*
15167 * b_wptr is set to make the apparent size of the data in the mblk_t
15168 * to exclude the pointers at the end of hook_pkt_observer_t.
15169 */
15170 imp->b_wptr = imp->b_rptr + sizeof (dl_ipnetinfo_t);
15171 imp->b_cont = mp;
15172
15173 ASSERT(DB_TYPE(mp) == M_DATA);
15174
15175 if (IS_UNDER_IPMP(ill))
15176 grifindex = ipmp_ill_get_ipmp_ifindex(ill);
15177 else
15178 grifindex = 0;
15179
15180 hdr->hpo_version = 1;
15181 hdr->hpo_htype = htons(htype);
15182 hdr->hpo_pktlen = htonl((ulong_t)msgdsize(mp));
15183 hdr->hpo_ifindex = htonl(ill->ill_phyint->phyint_ifindex);
15184 hdr->hpo_grifindex = htonl(grifindex);
15185 hdr->hpo_zsrc = htonl(zsrc);
15186 hdr->hpo_zdst = htonl(zdst);
15187 hdr->hpo_pkt = imp;
15188 hdr->hpo_ctx = ipst->ips_netstack;
15189
15190 if (ill->ill_isv6) {
15191 hdr->hpo_family = AF_INET6;
15192 (void) hook_run(ipst->ips_ipv6_net_data->netd_hooks,
15193 ipst->ips_ipv6observing, (hook_data_t)hdr);
15194 } else {
15195 hdr->hpo_family = AF_INET;
15196 (void) hook_run(ipst->ips_ipv4_net_data->netd_hooks,
15197 ipst->ips_ipv4observing, (hook_data_t)hdr);
15198 }
15199
15200 imp->b_cont = NULL;
15201 freemsg(imp);
15202 }
15203
15204 /*
15205 * Utility routine that checks if `v4srcp' is a valid address on underlying
15206 * interface `ill'. If `ipifp' is non-NULL, it's set to a held ipif
15207 * associated with `v4srcp' on success. NOTE: if this is not called from
15208 * inside the IPSQ (ill_g_lock is not held), `ill' may be removed from the
15209 * group during or after this lookup.
15210 */
15211 boolean_t
15212 ipif_lookup_testaddr_v4(ill_t *ill, const in_addr_t *v4srcp, ipif_t **ipifp)
15213 {
15214 ipif_t *ipif;
15215
15216 ipif = ipif_lookup_addr_exact(*v4srcp, ill, ill->ill_ipst);
15217 if (ipif != NULL) {
15218 if (ipifp != NULL)
15219 *ipifp = ipif;
15220 else
15221 ipif_refrele(ipif);
15222 return (B_TRUE);
15223 }
15224
15225 ip1dbg(("ipif_lookup_testaddr_v4: cannot find ipif for src %x\n",
15226 *v4srcp));
15227 return (B_FALSE);
15228 }
15229
15230 /*
15231 * Transport protocol call back function for CPU state change.
15232 */
15233 /* ARGSUSED */
15234 static int
15235 ip_tp_cpu_update(cpu_setup_t what, int id, void *arg)
15236 {
15237 processorid_t cpu_seqid;
15238 netstack_handle_t nh;
15239 netstack_t *ns;
15240
15241 ASSERT(MUTEX_HELD(&cpu_lock));
15242
15243 switch (what) {
15244 case CPU_CONFIG:
15245 case CPU_ON:
15246 case CPU_INIT:
15247 case CPU_CPUPART_IN:
15248 cpu_seqid = cpu[id]->cpu_seqid;
15249 netstack_next_init(&nh);
15250 while ((ns = netstack_next(&nh)) != NULL) {
15251 tcp_stack_cpu_add(ns->netstack_tcp, cpu_seqid);
15252 sctp_stack_cpu_add(ns->netstack_sctp, cpu_seqid);
15253 udp_stack_cpu_add(ns->netstack_udp, cpu_seqid);
15254 netstack_rele(ns);
15255 }
15256 netstack_next_fini(&nh);
15257 break;
15258 case CPU_UNCONFIG:
15259 case CPU_OFF:
15260 case CPU_CPUPART_OUT:
15261 /*
15262 * Nothing to do. We don't remove the per CPU stats from
15263 * the IP stack even when the CPU goes offline.
15264 */
15265 break;
15266 default:
15267 break;
15268 }
15269 return (0);
15270 }