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 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright (c) 2011, Joyent Inc. All rights reserved.
24 * Copyright (c) 2013, OmniTI Computer Consulting, Inc. All rights reserved.
25 * Copyright (c) 2013, 2014 by Delphix. All rights reserved.
26 */
27
28 #ifndef _INET_TCP_IMPL_H
29 #define _INET_TCP_IMPL_H
30
31 /*
32 * TCP implementation private declarations. These interfaces are
33 * used to build the IP module and are not meant to be accessed
34 * by any modules except IP itself. They are undocumented and are
35 * subject to change without notice.
36 */
37
38 #ifdef __cplusplus
39 extern "C" {
40 #endif
41
42 #ifdef _KERNEL
43
44 #include <sys/cpuvar.h>
45 #include <sys/clock_impl.h> /* For LBOLT_FASTPATH{,64} */
46 #include <inet/optcom.h>
47 #include <inet/tcp.h>
48 #include <inet/tunables.h>
49
50 #define TCP_MOD_ID 5105
51
52 extern struct qinit tcp_sock_winit;
53 extern struct qinit tcp_winit;
54
55 extern sock_downcalls_t sock_tcp_downcalls;
56
57 /*
58 * Note that by default, the _snd_lowat_fraction tunable controls the value of
59 * the transmit low water mark. TCP_XMIT_LOWATER (and thus the _xmit_lowat
60 * property) is only used if the administrator has disabled _snd_lowat_fraction
61 * by setting it to 0.
62 */
63 #define TCP_XMIT_LOWATER 4096
64 #define TCP_XMIT_HIWATER 49152
65 #define TCP_RECV_LOWATER 2048
66 #define TCP_RECV_HIWATER 128000
67
68 /*
69 * Bind hash list size and has function. It has to be a power of 2 for
70 * hashing.
71 */
72 #define TCP_BIND_FANOUT_SIZE 1024
73 #define TCP_BIND_HASH(lport) (ntohs(lport) & (TCP_BIND_FANOUT_SIZE - 1))
74
75 /*
76 * This implementation follows the 4.3BSD interpretation of the urgent
77 * pointer and not RFC 1122. Switching to RFC 1122 behavior would cause
78 * incompatible changes in protocols like telnet and rlogin.
79 */
80 #define TCP_OLD_URP_INTERPRETATION 1
81
82 /* TCP option length */
83 #define TCPOPT_NOP_LEN 1
84 #define TCPOPT_MAXSEG_LEN 4
85 #define TCPOPT_WS_LEN 3
86 #define TCPOPT_REAL_WS_LEN (TCPOPT_WS_LEN+1)
87 #define TCPOPT_TSTAMP_LEN 10
88 #define TCPOPT_REAL_TS_LEN (TCPOPT_TSTAMP_LEN+2)
89 #define TCPOPT_SACK_OK_LEN 2
90 #define TCPOPT_REAL_SACK_OK_LEN (TCPOPT_SACK_OK_LEN+2)
91 #define TCPOPT_REAL_SACK_LEN 4
92 #define TCPOPT_MAX_SACK_LEN 36
93 #define TCPOPT_HEADER_LEN 2
94
95 /* Round up the value to the nearest mss. */
96 #define MSS_ROUNDUP(value, mss) ((((value) - 1) / (mss) + 1) * (mss))
97
98 /*
99 * Was this tcp created via socket() interface?
100 */
101 #define TCP_IS_SOCKET(tcp) ((tcp)->tcp_issocket)
102
103 /*
104 * Is this tcp not attached to any upper client?
105 */
106 #define TCP_IS_DETACHED(tcp) ((tcp)->tcp_detached)
107
108 /* TCP timers related data strucutres. Refer to tcp_timers.c. */
109 typedef struct tcp_timer_s {
110 conn_t *connp;
111 void (*tcpt_proc)(void *);
112 callout_id_t tcpt_tid;
113 } tcp_timer_t;
114
115 extern kmem_cache_t *tcp_timercache;
116
117 /*
118 * Macro for starting various timers. Retransmission timer has its own macro,
119 * TCP_TIMER_RESTART(). tim is in millisec.
120 */
121 #define TCP_TIMER(tcp, f, tim) \
122 tcp_timeout(tcp->tcp_connp, f, tim)
123 #define TCP_TIMER_CANCEL(tcp, id) \
124 tcp_timeout_cancel(tcp->tcp_connp, id)
125
126 /*
127 * To restart the TCP retransmission timer. intvl is in millisec.
128 */
129 #define TCP_TIMER_RESTART(tcp, intvl) { \
130 if ((tcp)->tcp_timer_tid != 0) \
131 (void) TCP_TIMER_CANCEL((tcp), (tcp)->tcp_timer_tid); \
132 (tcp)->tcp_timer_tid = TCP_TIMER((tcp), tcp_timer, (intvl)); \
133 }
134
135 /*
136 * For scalability, we must not run a timer for every TCP connection
137 * in TIME_WAIT state. To see why, consider (for time wait interval of
138 * 1 minutes):
139 * 10,000 connections/sec * 60 seconds/time wait = 600,000 active conn's
140 *
141 * This list is ordered by time, so you need only delete from the head
142 * until you get to entries which aren't old enough to delete yet.
143 * The list consists of only the detached TIME_WAIT connections.
144 *
145 * When a tcp_t enters TIME_WAIT state, a timer is started (timeout is
146 * tcps_time_wait_interval). When the tcp_t is detached (upper layer closes
147 * the end point), it is moved to the time wait list and another timer is
148 * started (expiry time is set at tcp_time_wait_expire, which is
149 * also calculated using tcps_time_wait_interval). This means that the
150 * TIME_WAIT state can be extended (up to doubled) if the tcp_t doesn't
151 * become detached for a long time.
152 *
153 * The list manipulations (including tcp_time_wait_next/prev)
154 * are protected by the tcp_time_wait_lock. The content of the
155 * detached TIME_WAIT connections is protected by the normal perimeters.
156 *
157 * This list is per squeue and squeues are shared across the tcp_stack_t's.
158 * Things on tcp_time_wait_head remain associated with the tcp_stack_t
159 * and conn_netstack.
160 * The tcp_t's that are added to tcp_free_list are disassociated and
161 * have NULL tcp_tcps and conn_netstack pointers.
162 */
163 typedef struct tcp_squeue_priv_s {
164 kmutex_t tcp_time_wait_lock;
165 callout_id_t tcp_time_wait_tid;
166 tcp_t *tcp_time_wait_head;
167 tcp_t *tcp_time_wait_tail;
168 tcp_t *tcp_free_list;
169 uint_t tcp_free_list_cnt;
170 #ifdef DEBUG
171 /*
172 * For debugging purpose, true when tcp_time_wait_collector() is
173 * running.
174 */
175 boolean_t tcp_time_wait_running;
176 #endif
177 } tcp_squeue_priv_t;
178
179 /*
180 * Parameters for TCP Initial Send Sequence number (ISS) generation. When
181 * tcp_strong_iss is set to 1, which is the default, the ISS is calculated
182 * by adding three components: a time component which grows by 1 every 4096
183 * nanoseconds (versus every 4 microseconds suggested by RFC 793, page 27);
184 * a per-connection component which grows by 125000 for every new connection;
185 * and an "extra" component that grows by a random amount centered
186 * approximately on 64000. This causes the ISS generator to cycle every
187 * 4.89 hours if no TCP connections are made, and faster if connections are
188 * made.
189 *
190 * When tcp_strong_iss is set to 0, ISS is calculated by adding two
191 * components: a time component which grows by 250000 every second; and
192 * a per-connection component which grows by 125000 for every new connections.
193 *
194 * A third method, when tcp_strong_iss is set to 2, for generating ISS is
195 * prescribed by Steve Bellovin. This involves adding time, the 125000 per
196 * connection, and a one-way hash (MD5) of the connection ID <sport, dport,
197 * src, dst>, a "truly" random (per RFC 1750) number, and a console-entered
198 * password.
199 */
200 #define ISS_INCR 250000
201 #define ISS_NSEC_SHT 12
202
203 /* Macros for timestamp comparisons */
204 #define TSTMP_GEQ(a, b) ((int32_t)((a)-(b)) >= 0)
205 #define TSTMP_LT(a, b) ((int32_t)((a)-(b)) < 0)
206
207 /*
208 * Initialize cwnd according to RFC 3390. def_max_init_cwnd is
209 * either tcp_slow_start_initial or tcp_slow_start_after idle
210 * depending on the caller. If the upper layer has not used the
211 * TCP_INIT_CWND option to change the initial cwnd, tcp_init_cwnd
212 * should be 0 and we use the formula in RFC 3390 to set tcp_cwnd.
213 * If the upper layer has changed set the tcp_init_cwnd, just use
214 * it to calculate the tcp_cwnd.
215 *
216 * "An Argument for Increasing TCP's Initial Congestion Window"
217 * ACM SIGCOMM Computer Communications Review, vol. 40 (2010), pp. 27-33
218 * -- Nandita Dukkipati, Tiziana Refice, Yuchung Cheng,
219 * Hsiao-keng Jerry Chu, Tom Herbert, Amit Agarwal,
220 * Arvind Jain, Natalia Sutin
221 *
222 * "Based on the results from our experiments, we believe the
223 * initial congestion window should be at least ten segments
224 * and the same be investigated for standardization by the IETF."
225 *
226 * As such, the def_max_init_cwnd argument with which this macro is
227 * invoked is either the tcps_slow_start_initial or
228 * tcps_slow_start_after_idle which both default to 0 and will respect
229 * RFC 3390 exactly. If the tunables are explicitly set by the operator,
230 * then the initial congestion window should be set as the operator
231 * demands, within reason. We shall arbitrarily define reason as a
232 * maximum of 16 (same as used by the TCP_INIT_CWND setsockopt).
233 */
234
235 /* Maximum TCP initial cwin (start/restart). */
236 #define TCP_MAX_INIT_CWND 16
237
238 #define TCP_SET_INIT_CWND(tcp, mss, def_max_init_cwnd) \
239 { \
240 if ((tcp)->tcp_init_cwnd == 0) { \
241 if (def_max_init_cwnd == 0) { \
242 (tcp)->tcp_cwnd = MIN(4 * (mss), \
243 MAX(2 * (mss), 4380 / (mss) * (mss))); \
244 } else { \
245 (tcp)->tcp_cwnd = MIN(TCP_MAX_INIT_CWND * (mss),\
246 def_max_init_cwnd * (mss)); \
247 } \
248 } else { \
249 (tcp)->tcp_cwnd = (tcp)->tcp_init_cwnd * (mss); \
250 } \
251 tcp->tcp_cwnd_cnt = 0; \
252 }
253
254 /*
255 * Set ECN capable transport (ECT) code point in IP header.
256 *
257 * Note that there are 2 ECT code points '01' and '10', which are called
258 * ECT(1) and ECT(0) respectively. Here we follow the original ECT code
259 * point ECT(0) for TCP as described in RFC 2481.
260 */
261 #define TCP_SET_ECT(tcp, iph) \
262 if ((tcp)->tcp_connp->conn_ipversion == IPV4_VERSION) { \
263 /* We need to clear the code point first. */ \
264 ((ipha_t *)(iph))->ipha_type_of_service &= 0xFC; \
265 ((ipha_t *)(iph))->ipha_type_of_service |= IPH_ECN_ECT0; \
266 } else { \
267 ((ip6_t *)(iph))->ip6_vcf &= htonl(0xFFCFFFFF); \
268 ((ip6_t *)(iph))->ip6_vcf |= htonl(IPH_ECN_ECT0 << 20); \
269 }
270
271 /*
272 * Set tcp_rto with boundary checking.
273 */
274 #define TCP_SET_RTO(tcp, rto) \
275 if ((rto) < (tcp)->tcp_rto_min) \
276 (tcp)->tcp_rto = (tcp)->tcp_rto_min; \
277 else if ((rto) > (tcp)->tcp_rto_max) \
278 (tcp)->tcp_rto = (tcp)->tcp_rto_max; \
279 else \
280 (tcp)->tcp_rto = (rto);
281
282 /*
283 * TCP options struct returned from tcp_parse_options.
284 */
285 typedef struct tcp_opt_s {
286 uint32_t tcp_opt_mss;
287 uint32_t tcp_opt_wscale;
288 uint32_t tcp_opt_ts_val;
289 uint32_t tcp_opt_ts_ecr;
290 tcp_t *tcp;
291 } tcp_opt_t;
292
293 /*
294 * Write-side flow-control is implemented via the per instance STREAMS
295 * write-side Q by explicitly setting QFULL to stop the flow of mblk_t(s)
296 * and clearing QFULL and calling qbackenable() to restart the flow based
297 * on the number of TCP unsent bytes (i.e. those not on the wire waiting
298 * for a remote ACK).
299 *
300 * This is different than a standard STREAMS kmod which when using the
301 * STREAMS Q the framework would automatictly flow-control based on the
302 * defined hiwat/lowat values as mblk_t's are enqueued/dequeued.
303 *
304 * As of FireEngine TCP write-side flow-control needs to take into account
305 * both the unsent tcp_xmit list bytes but also any squeue_t enqueued bytes
306 * (i.e. from tcp_wput() -> tcp_output()).
307 *
308 * This is accomplished by adding a new tcp_t fields, tcp_squeue_bytes, to
309 * count the number of bytes enqueued by tcp_wput() and the number of bytes
310 * dequeued and processed by tcp_output().
311 *
312 * So, the total number of bytes unsent is (squeue_bytes + unsent) with all
313 * flow-control uses of unsent replaced with the macro TCP_UNSENT_BYTES.
314 */
315 extern void tcp_clrqfull(tcp_t *);
316 extern void tcp_setqfull(tcp_t *);
317
318 #define TCP_UNSENT_BYTES(tcp) \
319 ((tcp)->tcp_squeue_bytes + (tcp)->tcp_unsent)
320
321 /*
322 * Linked list struct to store listener connection limit configuration per
323 * IP stack. The list is stored at tcps_listener_conf in tcp_stack_t.
324 *
325 * tl_port: the listener port of this limit configuration
326 * tl_ratio: the maximum amount of memory consumed by all concurrent TCP
327 * connections created by a listener does not exceed 1/tl_ratio
328 * of the total system memory. Note that this is only an
329 * approximation.
330 * tl_link: linked list struct
331 */
332 typedef struct tcp_listener_s {
333 in_port_t tl_port;
334 uint32_t tl_ratio;
335 list_node_t tl_link;
336 } tcp_listener_t;
337
338 /*
339 * If there is a limit set on the number of connections allowed per each
340 * listener, the following struct is used to store that counter. It keeps
341 * the number of TCP connection created by a listener. Note that this needs
342 * to be separated from the listener since the listener can go away before
343 * all the connections are gone.
344 *
345 * When the struct is allocated, tlc_cnt is set to 1. When a new connection
346 * is created by the listener, tlc_cnt is incremented by 1. When a connection
347 * created by the listener goes away, tlc_count is decremented by 1. When the
348 * listener itself goes away, tlc_cnt is decremented by one. The last
349 * connection (or the listener) which decrements tlc_cnt to zero frees the
350 * struct.
351 *
352 * tlc_max is the maximum number of concurrent TCP connections created from a
353 * listner. It is calculated when the tcp_listen_cnt_t is allocated.
354 *
355 * tlc_report_time stores the time when cmn_err() is called to report that the
356 * max has been exceeeded. Report is done at most once every
357 * TCP_TLC_REPORT_INTERVAL mins for a listener.
358 *
359 * tlc_drop stores the number of connection attempt dropped because the
360 * limit has reached.
361 */
362 typedef struct tcp_listen_cnt_s {
363 uint32_t tlc_max;
364 uint32_t tlc_cnt;
365 int64_t tlc_report_time;
366 uint32_t tlc_drop;
367 } tcp_listen_cnt_t;
368
369 #define TCP_TLC_REPORT_INTERVAL (30 * MINUTES)
370
371 #define TCP_DECR_LISTEN_CNT(tcp) \
372 { \
373 ASSERT((tcp)->tcp_listen_cnt->tlc_cnt > 0); \
374 if (atomic_dec_32_nv(&(tcp)->tcp_listen_cnt->tlc_cnt) == 0) \
375 kmem_free((tcp)->tcp_listen_cnt, sizeof (tcp_listen_cnt_t)); \
376 (tcp)->tcp_listen_cnt = NULL; \
377 }
378
379 /* Increment and decrement the number of connections in tcp_stack_t. */
380 #define TCPS_CONN_INC(tcps) \
381 atomic_inc_64( \
382 (uint64_t *)&(tcps)->tcps_sc[CPU->cpu_seqid]->tcp_sc_conn_cnt)
383
384 #define TCPS_CONN_DEC(tcps) \
385 atomic_dec_64( \
386 (uint64_t *)&(tcps)->tcps_sc[CPU->cpu_seqid]->tcp_sc_conn_cnt)
387
388 /*
389 * When the system is under memory pressure, stack variable tcps_reclaim is
390 * true, we shorten the connection timeout abort interval to tcp_early_abort
391 * seconds. Defined in tcp.c.
392 */
393 extern uint32_t tcp_early_abort;
394
395 /*
396 * To reach to an eager in Q0 which can be dropped due to an incoming
397 * new SYN request when Q0 is full, a new doubly linked list is
398 * introduced. This list allows to select an eager from Q0 in O(1) time.
399 * This is needed to avoid spending too much time walking through the
400 * long list of eagers in Q0 when tcp_drop_q0() is called. Each member of
401 * this new list has to be a member of Q0.
402 * This list is headed by listener's tcp_t. When the list is empty,
403 * both the pointers - tcp_eager_next_drop_q0 and tcp_eager_prev_drop_q0,
404 * of listener's tcp_t point to listener's tcp_t itself.
405 *
406 * Given an eager in Q0 and a listener, MAKE_DROPPABLE() puts the eager
407 * in the list. MAKE_UNDROPPABLE() takes the eager out of the list.
408 * These macros do not affect the eager's membership to Q0.
409 */
410 #define MAKE_DROPPABLE(listener, eager) \
411 if ((eager)->tcp_eager_next_drop_q0 == NULL) { \
412 (listener)->tcp_eager_next_drop_q0->tcp_eager_prev_drop_q0\
413 = (eager); \
414 (eager)->tcp_eager_prev_drop_q0 = (listener); \
415 (eager)->tcp_eager_next_drop_q0 = \
416 (listener)->tcp_eager_next_drop_q0; \
417 (listener)->tcp_eager_next_drop_q0 = (eager); \
418 }
419
420 #define MAKE_UNDROPPABLE(eager) \
421 if ((eager)->tcp_eager_next_drop_q0 != NULL) { \
422 (eager)->tcp_eager_next_drop_q0->tcp_eager_prev_drop_q0 \
423 = (eager)->tcp_eager_prev_drop_q0; \
424 (eager)->tcp_eager_prev_drop_q0->tcp_eager_next_drop_q0 \
425 = (eager)->tcp_eager_next_drop_q0; \
426 (eager)->tcp_eager_prev_drop_q0 = NULL; \
427 (eager)->tcp_eager_next_drop_q0 = NULL; \
428 }
429
430 /*
431 * The format argument to pass to tcp_display().
432 * DISP_PORT_ONLY means that the returned string has only port info.
433 * DISP_ADDR_AND_PORT means that the returned string also contains the
434 * remote and local IP address.
435 */
436 #define DISP_PORT_ONLY 1
437 #define DISP_ADDR_AND_PORT 2
438
439 #define IP_ADDR_CACHE_SIZE 2048
440 #define IP_ADDR_CACHE_HASH(faddr) \
441 (ntohl(faddr) & (IP_ADDR_CACHE_SIZE -1))
442
443 /*
444 * TCP reassembly macros. We hide starting and ending sequence numbers in
445 * b_next and b_prev of messages on the reassembly queue. The messages are
446 * chained using b_cont. These macros are used in tcp_reass() so we don't
447 * have to see the ugly casts and assignments.
448 */
449 #define TCP_REASS_SEQ(mp) ((uint32_t)(uintptr_t)((mp)->b_next))
450 #define TCP_REASS_SET_SEQ(mp, u) ((mp)->b_next = \
451 (mblk_t *)(uintptr_t)(u))
452 #define TCP_REASS_END(mp) ((uint32_t)(uintptr_t)((mp)->b_prev))
453 #define TCP_REASS_SET_END(mp, u) ((mp)->b_prev = \
454 (mblk_t *)(uintptr_t)(u))
455
456 #define tcps_time_wait_interval tcps_propinfo_tbl[0].prop_cur_uval
457 #define tcps_conn_req_max_q tcps_propinfo_tbl[1].prop_cur_uval
458 #define tcps_conn_req_max_q0 tcps_propinfo_tbl[2].prop_cur_uval
459 #define tcps_conn_req_min tcps_propinfo_tbl[3].prop_cur_uval
460 #define tcps_conn_grace_period tcps_propinfo_tbl[4].prop_cur_uval
461 #define tcps_cwnd_max_ tcps_propinfo_tbl[5].prop_cur_uval
462 #define tcps_dbg tcps_propinfo_tbl[6].prop_cur_uval
463 #define tcps_smallest_nonpriv_port tcps_propinfo_tbl[7].prop_cur_uval
464 #define tcps_ip_abort_cinterval tcps_propinfo_tbl[8].prop_cur_uval
465 #define tcps_ip_abort_linterval tcps_propinfo_tbl[9].prop_cur_uval
466 #define tcps_ip_abort_interval tcps_propinfo_tbl[10].prop_cur_uval
467 #define tcps_ip_notify_cinterval tcps_propinfo_tbl[11].prop_cur_uval
468 #define tcps_ip_notify_interval tcps_propinfo_tbl[12].prop_cur_uval
469 #define tcps_ipv4_ttl tcps_propinfo_tbl[13].prop_cur_uval
470 #define tcps_keepalive_interval_high tcps_propinfo_tbl[14].prop_max_uval
471 #define tcps_keepalive_interval tcps_propinfo_tbl[14].prop_cur_uval
472 #define tcps_keepalive_interval_low tcps_propinfo_tbl[14].prop_min_uval
473 #define tcps_maxpsz_multiplier tcps_propinfo_tbl[15].prop_cur_uval
474 #define tcps_mss_def_ipv4 tcps_propinfo_tbl[16].prop_cur_uval
475 #define tcps_mss_max_ipv4 tcps_propinfo_tbl[17].prop_cur_uval
476 #define tcps_mss_min tcps_propinfo_tbl[18].prop_cur_uval
477 #define tcps_naglim_def tcps_propinfo_tbl[19].prop_cur_uval
478 #define tcps_rexmit_interval_initial_high \
479 tcps_propinfo_tbl[20].prop_max_uval
480 #define tcps_rexmit_interval_initial tcps_propinfo_tbl[20].prop_cur_uval
481 #define tcps_rexmit_interval_initial_low \
482 tcps_propinfo_tbl[20].prop_min_uval
483 #define tcps_rexmit_interval_max_high tcps_propinfo_tbl[21].prop_max_uval
484 #define tcps_rexmit_interval_max tcps_propinfo_tbl[21].prop_cur_uval
485 #define tcps_rexmit_interval_max_low tcps_propinfo_tbl[21].prop_min_uval
486 #define tcps_rexmit_interval_min_high tcps_propinfo_tbl[22].prop_max_uval
487 #define tcps_rexmit_interval_min tcps_propinfo_tbl[22].prop_cur_uval
488 #define tcps_rexmit_interval_min_low tcps_propinfo_tbl[22].prop_min_uval
489 #define tcps_deferred_ack_interval tcps_propinfo_tbl[23].prop_cur_uval
490 #define tcps_snd_lowat_fraction tcps_propinfo_tbl[24].prop_cur_uval
491 #define tcps_dupack_fast_retransmit tcps_propinfo_tbl[25].prop_cur_uval
492 #define tcps_ignore_path_mtu tcps_propinfo_tbl[26].prop_cur_bval
493 #define tcps_smallest_anon_port tcps_propinfo_tbl[27].prop_cur_uval
494 #define tcps_largest_anon_port tcps_propinfo_tbl[28].prop_cur_uval
495 #define tcps_xmit_hiwat tcps_propinfo_tbl[29].prop_cur_uval
496 #define tcps_xmit_lowat tcps_propinfo_tbl[30].prop_cur_uval
497 #define tcps_recv_hiwat tcps_propinfo_tbl[31].prop_cur_uval
498 #define tcps_recv_hiwat_minmss tcps_propinfo_tbl[32].prop_cur_uval
499 #define tcps_fin_wait_2_flush_interval_high \
500 tcps_propinfo_tbl[33].prop_max_uval
501 #define tcps_fin_wait_2_flush_interval tcps_propinfo_tbl[33].prop_cur_uval
502 #define tcps_fin_wait_2_flush_interval_low \
503 tcps_propinfo_tbl[33].prop_min_uval
504 #define tcps_max_buf tcps_propinfo_tbl[34].prop_cur_uval
505 #define tcps_strong_iss tcps_propinfo_tbl[35].prop_cur_uval
506 #define tcps_rtt_updates tcps_propinfo_tbl[36].prop_cur_uval
507 #define tcps_wscale_always tcps_propinfo_tbl[37].prop_cur_bval
508 #define tcps_tstamp_always tcps_propinfo_tbl[38].prop_cur_bval
509 #define tcps_tstamp_if_wscale tcps_propinfo_tbl[39].prop_cur_bval
510 #define tcps_rexmit_interval_extra tcps_propinfo_tbl[40].prop_cur_uval
511 #define tcps_deferred_acks_max tcps_propinfo_tbl[41].prop_cur_uval
512 #define tcps_slow_start_after_idle tcps_propinfo_tbl[42].prop_cur_uval
513 #define tcps_slow_start_initial tcps_propinfo_tbl[43].prop_cur_uval
514 #define tcps_sack_permitted tcps_propinfo_tbl[44].prop_cur_uval
515 #define tcps_ipv6_hoplimit tcps_propinfo_tbl[45].prop_cur_uval
516 #define tcps_mss_def_ipv6 tcps_propinfo_tbl[46].prop_cur_uval
517 #define tcps_mss_max_ipv6 tcps_propinfo_tbl[47].prop_cur_uval
518 #define tcps_rev_src_routes tcps_propinfo_tbl[48].prop_cur_bval
519 #define tcps_local_dack_interval tcps_propinfo_tbl[49].prop_cur_uval
520 #define tcps_local_dacks_max tcps_propinfo_tbl[50].prop_cur_uval
521 #define tcps_ecn_permitted tcps_propinfo_tbl[51].prop_cur_uval
522 #define tcps_rst_sent_rate_enabled tcps_propinfo_tbl[52].prop_cur_bval
523 #define tcps_rst_sent_rate tcps_propinfo_tbl[53].prop_cur_uval
524 #define tcps_push_timer_interval tcps_propinfo_tbl[54].prop_cur_uval
525 #define tcps_use_smss_as_mss_opt tcps_propinfo_tbl[55].prop_cur_bval
526 #define tcps_keepalive_abort_interval_high \
527 tcps_propinfo_tbl[56].prop_max_uval
528 #define tcps_keepalive_abort_interval \
529 tcps_propinfo_tbl[56].prop_cur_uval
530 #define tcps_keepalive_abort_interval_low \
531 tcps_propinfo_tbl[56].prop_min_uval
532 #define tcps_wroff_xtra tcps_propinfo_tbl[57].prop_cur_uval
533 #define tcps_dev_flow_ctl tcps_propinfo_tbl[58].prop_cur_bval
534 #define tcps_reass_timeout tcps_propinfo_tbl[59].prop_cur_uval
535 #define tcps_iss_incr tcps_propinfo_tbl[65].prop_cur_uval
536
537 extern struct qinit tcp_rinitv4, tcp_rinitv6;
538 extern boolean_t do_tcp_fusion;
539
540 /*
541 * Object to represent database of options to search passed to
542 * {sock,tpi}optcom_req() interface routine to take care of option
543 * management and associated methods.
544 */
545 extern optdb_obj_t tcp_opt_obj;
546 extern uint_t tcp_max_optsize;
547
548 extern int tcp_squeue_flag;
549
550 extern uint_t tcp_free_list_max_cnt;
551
552 /*
553 * Functions in tcp.c.
554 */
555 extern void tcp_acceptor_hash_insert(t_uscalar_t, tcp_t *);
556 extern tcp_t *tcp_acceptor_hash_lookup(t_uscalar_t, tcp_stack_t *);
557 extern void tcp_acceptor_hash_remove(tcp_t *);
558 extern mblk_t *tcp_ack_mp(tcp_t *);
559 extern int tcp_build_hdrs(tcp_t *);
560 extern void tcp_cleanup(tcp_t *);
561 extern int tcp_clean_death(tcp_t *, int);
562 extern void tcp_clean_death_wrapper(void *, mblk_t *, void *,
563 ip_recv_attr_t *);
564 extern void tcp_close_common(conn_t *, int);
565 extern void tcp_close_detached(tcp_t *);
566 extern void tcp_close_mpp(mblk_t **);
567 extern void tcp_closei_local(tcp_t *);
568 extern sock_lower_handle_t tcp_create(int, int, int, sock_downcalls_t **,
569 uint_t *, int *, int, cred_t *);
570 extern conn_t *tcp_create_common(cred_t *, boolean_t, boolean_t, int *);
571 extern void tcp_disconnect(tcp_t *, mblk_t *);
572 extern char *tcp_display(tcp_t *, char *, char);
573 extern int tcp_do_bind(conn_t *, struct sockaddr *, socklen_t, cred_t *,
574 boolean_t);
575 extern int tcp_do_connect(conn_t *, const struct sockaddr *, socklen_t,
576 cred_t *, pid_t);
577 extern int tcp_do_listen(conn_t *, struct sockaddr *, socklen_t, int,
578 cred_t *, boolean_t);
579 extern int tcp_do_unbind(conn_t *);
580 extern boolean_t tcp_eager_blowoff(tcp_t *, t_scalar_t);
581 extern void tcp_eager_cleanup(tcp_t *, boolean_t);
582 extern void tcp_eager_kill(void *, mblk_t *, void *, ip_recv_attr_t *);
583 extern void tcp_eager_unlink(tcp_t *);
584 extern void tcp_init_values(tcp_t *, tcp_t *);
585 extern void tcp_ipsec_cleanup(tcp_t *);
586 extern int tcp_maxpsz_set(tcp_t *, boolean_t);
587 extern void tcp_mss_set(tcp_t *, uint32_t);
588 extern void tcp_reinput(conn_t *, mblk_t *, ip_recv_attr_t *, ip_stack_t *);
589 extern void tcp_rsrv(queue_t *);
590 extern uint_t tcp_rwnd_reopen(tcp_t *);
591 extern int tcp_rwnd_set(tcp_t *, uint32_t);
592 extern int tcp_set_destination(tcp_t *);
593 extern void tcp_set_ws_value(tcp_t *);
594 extern void tcp_stop_lingering(tcp_t *);
595 extern void tcp_update_pmtu(tcp_t *, boolean_t);
596 extern mblk_t *tcp_zcopy_backoff(tcp_t *, mblk_t *, boolean_t);
597 extern boolean_t tcp_zcopy_check(tcp_t *);
598 extern void tcp_zcopy_notify(tcp_t *);
599 extern void tcp_get_proto_props(tcp_t *, struct sock_proto_props *);
600
601 /*
602 * Bind related functions in tcp_bind.c
603 */
604 extern int tcp_bind_check(conn_t *, struct sockaddr *, socklen_t,
605 cred_t *, boolean_t);
606 extern void tcp_bind_hash_insert(tf_t *, tcp_t *, int);
607 extern void tcp_bind_hash_remove(tcp_t *);
608 extern in_port_t tcp_bindi(tcp_t *, in_port_t, const in6_addr_t *,
609 int, boolean_t, boolean_t, boolean_t);
610 extern in_port_t tcp_update_next_port(in_port_t, const tcp_t *,
611 boolean_t);
612
613 /*
614 * Fusion related functions in tcp_fusion.c.
615 */
616 extern void tcp_fuse(tcp_t *, uchar_t *, tcpha_t *);
617 extern void tcp_unfuse(tcp_t *);
618 extern boolean_t tcp_fuse_output(tcp_t *, mblk_t *, uint32_t);
619 extern void tcp_fuse_output_urg(tcp_t *, mblk_t *);
620 extern boolean_t tcp_fuse_rcv_drain(queue_t *, tcp_t *, mblk_t **);
621 extern size_t tcp_fuse_set_rcv_hiwat(tcp_t *, size_t);
622 extern int tcp_fuse_maxpsz(tcp_t *);
623 extern void tcp_fuse_backenable(tcp_t *);
624 extern void tcp_iss_key_init(uint8_t *, int, tcp_stack_t *);
625
626 /*
627 * Output related functions in tcp_output.c.
628 */
629 extern void tcp_close_output(void *, mblk_t *, void *, ip_recv_attr_t *);
630 extern void tcp_output(void *, mblk_t *, void *, ip_recv_attr_t *);
631 extern void tcp_output_urgent(void *, mblk_t *, void *, ip_recv_attr_t *);
632 extern void tcp_rexmit_after_error(tcp_t *);
633 extern void tcp_sack_rexmit(tcp_t *, uint_t *);
634 extern void tcp_send_data(tcp_t *, mblk_t *);
635 extern void tcp_send_synack(void *, mblk_t *, void *, ip_recv_attr_t *);
636 extern void tcp_shutdown_output(void *, mblk_t *, void *, ip_recv_attr_t *);
637 extern void tcp_ss_rexmit(tcp_t *);
638 extern void tcp_update_xmit_tail(tcp_t *, uint32_t);
639 extern void tcp_wput(queue_t *, mblk_t *);
640 extern void tcp_wput_data(tcp_t *, mblk_t *, boolean_t);
641 extern void tcp_wput_sock(queue_t *, mblk_t *);
642 extern void tcp_wput_fallback(queue_t *, mblk_t *);
643 extern void tcp_xmit_ctl(char *, tcp_t *, uint32_t, uint32_t, int);
644 extern void tcp_xmit_listeners_reset(mblk_t *, ip_recv_attr_t *,
645 ip_stack_t *i, conn_t *);
646 extern mblk_t *tcp_xmit_mp(tcp_t *, mblk_t *, int32_t, int32_t *,
647 mblk_t **, uint32_t, boolean_t, uint32_t *, boolean_t);
648
649 /*
650 * Input related functions in tcp_input.c.
651 */
652 extern void tcp_icmp_input(void *, mblk_t *, void *, ip_recv_attr_t *);
653 extern void tcp_input_data(void *, mblk_t *, void *, ip_recv_attr_t *);
654 extern void tcp_input_listener_unbound(void *, mblk_t *, void *,
655 ip_recv_attr_t *);
656 extern boolean_t tcp_paws_check(tcp_t *, tcpha_t *, tcp_opt_t *);
657 extern uint_t tcp_rcv_drain(tcp_t *);
658 extern void tcp_rcv_enqueue(tcp_t *, mblk_t *, uint_t, cred_t *);
659 extern boolean_t tcp_verifyicmp(conn_t *, void *, icmph_t *, icmp6_t *,
660 ip_recv_attr_t *);
661
662 /*
663 * Kernel socket related functions in tcp_socket.c.
664 */
665 extern int tcp_fallback(sock_lower_handle_t, queue_t *, boolean_t,
666 so_proto_quiesced_cb_t, sock_quiesce_arg_t *);
667 extern boolean_t tcp_newconn_notify(tcp_t *, ip_recv_attr_t *);
668
669 /*
670 * Timer related functions in tcp_timers.c.
671 */
672 extern void tcp_ack_timer(void *);
673 extern void tcp_close_linger_timeout(void *);
674 extern void tcp_keepalive_timer(void *);
675 extern void tcp_push_timer(void *);
676 extern void tcp_reass_timer(void *);
677 extern mblk_t *tcp_timermp_alloc(int);
678 extern void tcp_timermp_free(tcp_t *);
679 extern timeout_id_t tcp_timeout(conn_t *, void (*)(void *), hrtime_t);
680 extern clock_t tcp_timeout_cancel(conn_t *, timeout_id_t);
681 extern void tcp_timer(void *arg);
682 extern void tcp_timers_stop(tcp_t *);
683
684 /*
685 * TCP TPI related functions in tcp_tpi.c.
686 */
687 extern void tcp_addr_req(tcp_t *, mblk_t *);
688 extern void tcp_capability_req(tcp_t *, mblk_t *);
689 extern boolean_t tcp_conn_con(tcp_t *, uchar_t *, mblk_t *,
690 mblk_t **, ip_recv_attr_t *);
691 extern void tcp_err_ack(tcp_t *, mblk_t *, int, int);
692 extern void tcp_err_ack_prim(tcp_t *, mblk_t *, int, int, int);
693 extern void tcp_info_req(tcp_t *, mblk_t *);
694 extern void tcp_send_conn_ind(void *, mblk_t *, void *);
695 extern void tcp_send_pending(void *, mblk_t *, void *, ip_recv_attr_t *);
696 extern void tcp_tpi_accept(queue_t *, mblk_t *);
697 extern void tcp_tpi_bind(tcp_t *, mblk_t *);
698 extern int tcp_tpi_close(queue_t *, int);
699 extern int tcp_tpi_close_accept(queue_t *);
700 extern void tcp_tpi_connect(tcp_t *, mblk_t *);
701 extern int tcp_tpi_opt_get(queue_t *, t_scalar_t, t_scalar_t, uchar_t *);
702 extern int tcp_tpi_opt_set(queue_t *, uint_t, int, int, uint_t, uchar_t *,
703 uint_t *, uchar_t *, void *, cred_t *);
704 extern void tcp_tpi_unbind(tcp_t *, mblk_t *);
705 extern void tcp_tli_accept(tcp_t *, mblk_t *);
706 extern void tcp_use_pure_tpi(tcp_t *);
707 extern void tcp_do_capability_ack(tcp_t *, struct T_capability_ack *,
708 t_uscalar_t);
709
710 /*
711 * TCP option processing related functions in tcp_opt_data.c
712 */
713 extern int tcp_opt_get(conn_t *, int, int, uchar_t *);
714 extern int tcp_opt_set(conn_t *, uint_t, int, int, uint_t, uchar_t *,
715 uint_t *, uchar_t *, void *, cred_t *);
716
717 /*
718 * TCP time wait processing related functions in tcp_time_wait.c.
719 */
720 extern void tcp_time_wait_append(tcp_t *);
721 extern void tcp_time_wait_collector(void *);
722 extern boolean_t tcp_time_wait_remove(tcp_t *, tcp_squeue_priv_t *);
723 extern void tcp_time_wait_processing(tcp_t *, mblk_t *, uint32_t,
724 uint32_t, int, tcpha_t *, ip_recv_attr_t *);
725
726 /*
727 * Misc functions in tcp_misc.c.
728 */
729 extern uint32_t tcp_find_listener_conf(tcp_stack_t *, in_port_t);
730 extern void tcp_ioctl_abort_conn(queue_t *, mblk_t *);
731 extern void tcp_listener_conf_cleanup(tcp_stack_t *);
732 extern void tcp_stack_cpu_add(tcp_stack_t *, processorid_t);
733
734 #endif /* _KERNEL */
735
736 #ifdef __cplusplus
737 }
738 #endif
739
740 #endif /* _INET_TCP_IMPL_H */