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) 1991, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright (c) 2011, Joyent, Inc. All rights reserved.
24 */
25 /* Copyright (c) 1990 Mentat Inc. */
26
27 #ifndef _INET_TCP_H
28 #define _INET_TCP_H
29
30 #ifdef __cplusplus
31 extern "C" {
32 #endif
33
34 #include <sys/inttypes.h>
35 #include <netinet/ip6.h>
36 #include <netinet/tcp.h>
37 #include <sys/socket.h>
38 #include <sys/socket_proto.h>
39 #include <sys/md5.h>
40 #include <inet/common.h>
41 #include <inet/ip.h>
42 #include <inet/ip6.h>
43 #include <inet/mi.h>
44 #include <inet/mib2.h>
45 #include <inet/tcp_stack.h>
46 #include <inet/tcp_sack.h>
47
48 /* TCP states */
49 #define TCPS_CLOSED -6
50 #define TCPS_IDLE -5 /* idle (opened, but not bound) */
51 #define TCPS_BOUND -4 /* bound, ready to connect or accept */
52 #define TCPS_LISTEN -3 /* listening for connection */
53 #define TCPS_SYN_SENT -2 /* active, have sent syn */
54 #define TCPS_SYN_RCVD -1 /* have received syn (and sent ours) */
55 /* states < TCPS_ESTABLISHED are those where connections not established */
56 #define TCPS_ESTABLISHED 0 /* established */
57 #define TCPS_CLOSE_WAIT 1 /* rcvd fin, waiting for close */
58 /* states > TCPS_CLOSE_WAIT are those where user has closed */
59 #define TCPS_FIN_WAIT_1 2 /* have closed and sent fin */
60 #define TCPS_CLOSING 3 /* closed, xchd FIN, await FIN ACK */
61 #define TCPS_LAST_ACK 4 /* had fin and close; await FIN ACK */
62 /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */
63 #define TCPS_FIN_WAIT_2 5 /* have closed, fin is acked */
64 #define TCPS_TIME_WAIT 6 /* in 2*msl quiet wait after close */
65
66 /*
67 * Internal flags used in conjunction with the packet header flags.
68 * Used in tcp_input_data to keep track of what needs to be done.
69 */
70 #define TH_LIMIT_XMIT 0x0400 /* Limited xmit is needed */
71 #define TH_XMIT_NEEDED 0x0800 /* Window opened - send queued data */
72 #define TH_REXMIT_NEEDED 0x1000 /* Time expired for unacked data */
73 #define TH_ACK_NEEDED 0x2000 /* Send an ack now. */
74 #define TH_NEED_SACK_REXMIT 0x4000 /* Use SACK info to retransmission */
75 #define TH_ACK_TIMER_NEEDED 0x8000 /* Start the delayed ACK timer */
76 #define TH_ORDREL_NEEDED 0x10000 /* Generate an ordrel indication */
77 #define TH_MARKNEXT_NEEDED 0x20000 /* Data should have MSGMARKNEXT */
78 #define TH_SEND_URP_MARK 0x40000 /* Send up tcp_urp_mark_mp */
79
80 /*
81 * TCP sequence numbers are 32 bit integers operated
82 * on with modular arithmetic. These macros can be
83 * used to compare such integers.
84 */
85 #define SEQ_LT(a, b) ((int32_t)((a)-(b)) < 0)
86 #define SEQ_LEQ(a, b) ((int32_t)((a)-(b)) <= 0)
87 #define SEQ_GT(a, b) ((int32_t)((a)-(b)) > 0)
88 #define SEQ_GEQ(a, b) ((int32_t)((a)-(b)) >= 0)
89
90 /* TCP Protocol header */
91 typedef struct tcphdr_s {
92 uint8_t th_lport[2]; /* Source port */
93 uint8_t th_fport[2]; /* Destination port */
94 uint8_t th_seq[4]; /* Sequence number */
95 uint8_t th_ack[4]; /* Acknowledgement number */
96 uint8_t th_offset_and_rsrvd[1]; /* Offset to the packet data */
97 uint8_t th_flags[1];
98 uint8_t th_win[2]; /* Allocation number */
99 uint8_t th_sum[2]; /* TCP checksum */
100 uint8_t th_urp[2]; /* Urgent pointer */
101 } tcph_t;
102
103 #define TCP_HDR_LENGTH(tcph) \
104 ((((tcph_t *)tcph)->th_offset_and_rsrvd[0] >>2) &(0xF << 2))
105 #define TCP_MAX_COMBINED_HEADER_LENGTH (60 + 60) /* Maxed out ip + tcp */
106 #define TCP_MAX_IP_OPTIONS_LENGTH (60 - IP_SIMPLE_HDR_LENGTH)
107 #define TCP_MAX_HDR_LENGTH 60
108 #define TCP_MAX_TCP_OPTIONS_LENGTH (60 - sizeof (tcpha_t))
109 #define TCP_MIN_HEADER_LENGTH 20
110 #define TCP_MAXWIN 65535
111 #define TCP_PORT_LEN sizeof (in_port_t)
112 #define TCP_MAX_WINSHIFT 14
113 #define TCP_MAX_LARGEWIN (TCP_MAXWIN << TCP_MAX_WINSHIFT)
114 #define TCP_MAX_LSO_LENGTH (IP_MAXPACKET - TCP_MAX_COMBINED_HEADER_LENGTH)
115
116 #define TCPIP_HDR_LENGTH(mp, n) \
117 (n) = IPH_HDR_LENGTH((mp)->b_rptr), \
118 (n) += TCP_HDR_LENGTH((tcpha_t *)&(mp)->b_rptr[(n)])
119
120 /* TCP Protocol header (used if the header is known to be 32-bit aligned) */
121 typedef struct tcphdra_s {
122 in_port_t tha_lport; /* Source port */
123 in_port_t tha_fport; /* Destination port */
124 uint32_t tha_seq; /* Sequence number */
125 uint32_t tha_ack; /* Acknowledgement number */
126 uint8_t tha_offset_and_reserved; /* Offset to the packet data */
127 uint8_t tha_flags;
128 uint16_t tha_win; /* Allocation number */
129 uint16_t tha_sum; /* TCP checksum */
130 uint16_t tha_urp; /* Urgent pointer */
131 } tcpha_t;
132
133 struct conn_s;
134 struct tcp_listen_cnt_s;
135
136 /*
137 * Control structure for each open TCP stream,
138 * defined only within the kernel or for a kmem user.
139 * NOTE: tcp_reinit_values MUST have a line for each field in this structure!
140 */
141 #if (defined(_KERNEL) || defined(_KMEMUSER))
142
143 typedef struct tcp_s {
144 struct tcp_s *tcp_time_wait_next;
145 /* Pointer to next T/W block */
146 struct tcp_s *tcp_time_wait_prev;
147 /* Pointer to previous T/W next */
148 int64_t tcp_time_wait_expire;
149
150 struct conn_s *tcp_connp; /* back pointer to conn_t */
151 tcp_stack_t *tcp_tcps; /* back pointer to tcp_stack_t */
152
153 int32_t tcp_state;
154 int32_t tcp_rcv_ws; /* My window scale power */
155 int32_t tcp_snd_ws; /* Sender's window scale power */
156 uint32_t tcp_ts_recent; /* Timestamp of earliest unacked */
157 /* data segment */
158 clock_t tcp_rto; /* Round trip timeout */
159 int64_t tcp_last_rcv_lbolt;
160 /* lbolt on last packet, used for PAWS */
161 uint32_t tcp_rto_initial; /* Initial RTO */
162 uint32_t tcp_rto_min; /* Minimum RTO */
163 uint32_t tcp_rto_max; /* Maximum RTO */
164
165 uint32_t tcp_snxt; /* Senders next seq num */
166 uint32_t tcp_swnd; /* Senders window (relative to suna) */
167 uint32_t tcp_mss; /* Max segment size */
168 uint32_t tcp_iss; /* Initial send seq num */
169 uint32_t tcp_rnxt; /* Seq we expect to recv next */
170 uint32_t tcp_rwnd;
171
172 /* Fields arranged in approximate access order along main paths */
173 mblk_t *tcp_xmit_head; /* Head of xmit/rexmit list */
174 mblk_t *tcp_xmit_last; /* Last valid data seen by tcp_wput */
175 mblk_t *tcp_xmit_tail; /* Last data sent */
176 uint32_t tcp_unsent; /* # of bytes in hand that are unsent */
177 uint32_t tcp_xmit_tail_unsent; /* # of unsent bytes in xmit_tail */
178
179 uint32_t tcp_suna; /* Sender unacknowledged */
180 uint32_t tcp_rexmit_nxt; /* Next rexmit seq num */
181 uint32_t tcp_rexmit_max; /* Max retran seq num */
182 int32_t tcp_snd_burst; /* Send burst factor */
183 uint32_t tcp_cwnd; /* Congestion window */
184 int32_t tcp_cwnd_cnt; /* cwnd cnt in congestion avoidance */
185
186 uint32_t tcp_ibsegs; /* Inbound segments on this stream */
187 uint32_t tcp_obsegs; /* Outbound segments on this stream */
188
189 uint32_t tcp_naglim; /* Tunable nagle limit */
190 uint32_t tcp_valid_bits;
191 #define TCP_ISS_VALID 0x1 /* Is the tcp_iss seq num active? */
192 #define TCP_FSS_VALID 0x2 /* Is the tcp_fss seq num active? */
193 #define TCP_URG_VALID 0x4 /* Is the tcp_urg seq num active? */
194 #define TCP_OFO_FIN_VALID 0x8 /* Has TCP received an out of order FIN? */
195
196
197
198 timeout_id_t tcp_timer_tid; /* Control block for timer service */
199 uchar_t tcp_timer_backoff; /* Backoff shift count. */
200 int64_t tcp_last_recv_time; /* Last time we receive a segment. */
201 uint32_t tcp_init_cwnd; /* Initial cwnd (start/restart) */
202
203 /* Following manipulated by TCP under squeue protection */
204 uint32_t
205 tcp_urp_last_valid : 1, /* Is tcp_urp_last valid? */
206 tcp_hard_binding : 1, /* TCP_DETACHED_NONEAGER */
207 tcp_fin_acked : 1, /* Has our FIN been acked? */
208 tcp_fin_rcvd : 1, /* Have we seen a FIN? */
209
210 tcp_fin_sent : 1, /* Have we sent our FIN yet? */
211 tcp_ordrel_done : 1, /* Have we sent the ord_rel upstream? */
212 tcp_detached : 1, /* If we're detached from a stream */
213 tcp_zero_win_probe: 1, /* Zero win probing is in progress */
214
215 tcp_loopback: 1, /* src and dst are the same machine */
216 tcp_localnet: 1, /* src and dst are on the same subnet */
217 tcp_syn_defense: 1, /* For defense against SYN attack */
218 #define tcp_dontdrop tcp_syn_defense
219 tcp_set_timer : 1,
220
221 tcp_active_open: 1, /* This is a active open */
222 tcp_rexmit : 1, /* TCP is retransmitting */
223 tcp_snd_sack_ok : 1, /* Can use SACK for this connection */
224 tcp_hwcksum : 1, /* The NIC is capable of hwcksum */
225
226 tcp_ip_forward_progress : 1,
227 tcp_ecn_ok : 1, /* Can use ECN for this connection */
228 tcp_ecn_echo_on : 1, /* Need to do ECN echo */
229 tcp_ecn_cwr_sent : 1, /* ECN_CWR has been sent */
230
231 tcp_cwr : 1, /* Cwnd has reduced recently */
232
233 tcp_pad_to_bit31 : 11;
234
235 /* Following manipulated by TCP under squeue protection */
236 uint32_t
237 tcp_snd_ts_ok : 1,
238 tcp_snd_ws_ok : 1,
239 tcp_reserved_port : 1,
240 tcp_in_free_list : 1,
241
242 tcp_snd_zcopy_on : 1, /* xmit zero-copy enabled */
243 tcp_snd_zcopy_aware : 1, /* client is zero-copy aware */
244 tcp_xmit_zc_clean : 1, /* the xmit list is free of zc-mblk */
245 tcp_wait_for_eagers : 1, /* Wait for eagers to disappear */
246
247 tcp_accept_error : 1, /* Error during TLI accept */
248 tcp_send_discon_ind : 1, /* TLI accept err, send discon ind */
249 tcp_cork : 1, /* tcp_cork option */
250 tcp_tconnind_started : 1, /* conn_ind message is being sent */
251
252 tcp_lso :1, /* Lower layer is capable of LSO */
253 tcp_is_wnd_shrnk : 1, /* Window has shrunk */
254
255 tcp_pad_to_bit_31 : 18;
256
257 uint32_t tcp_initial_pmtu; /* Initial outgoing Path MTU. */
258
259 mblk_t *tcp_reass_head; /* Out of order reassembly list head */
260 mblk_t *tcp_reass_tail; /* Out of order reassembly list tail */
261
262 /* SACK related info */
263 tcp_sack_info_t tcp_sack_info;
264
265 #define tcp_pipe tcp_sack_info.tcp_pipe
266 #define tcp_fack tcp_sack_info.tcp_fack
267 #define tcp_sack_snxt tcp_sack_info.tcp_sack_snxt
268 #define tcp_max_sack_blk tcp_sack_info.tcp_max_sack_blk
269 #define tcp_num_sack_blk tcp_sack_info.tcp_num_sack_blk
270 #define tcp_sack_list tcp_sack_info.tcp_sack_list
271 #define tcp_num_notsack_blk tcp_sack_info.tcp_num_notsack_blk
272 #define tcp_cnt_notsack_list tcp_sack_info.tcp_cnt_notsack_list
273 #define tcp_notsack_list tcp_sack_info.tcp_notsack_list
274
275 mblk_t *tcp_rcv_list; /* Queued until push, urgent data, */
276 mblk_t *tcp_rcv_last_head; /* optdata, or the count exceeds */
277 mblk_t *tcp_rcv_last_tail; /* tcp_rcv_push_wait. */
278 uint32_t tcp_rcv_cnt; /* tcp_rcv_list is b_next chain. */
279
280 uint32_t tcp_cwnd_ssthresh; /* Congestion window */
281 uint32_t tcp_cwnd_max;
282 uint32_t tcp_csuna; /* Clear (no rexmits in window) suna */
283
284 clock_t tcp_rtt_sa; /* Round trip smoothed average */
285 clock_t tcp_rtt_sd; /* Round trip smoothed deviation */
286 clock_t tcp_rtt_update; /* Round trip update(s) */
287 clock_t tcp_ms_we_have_waited; /* Total retrans time */
288
289 uint32_t tcp_swl1; /* These help us avoid using stale */
290 uint32_t tcp_swl2; /* packets to update state */
291
292 uint32_t tcp_rack; /* Seq # we have acked */
293 uint32_t tcp_rack_cnt; /* # of segs we have deferred ack */
294 uint32_t tcp_rack_cur_max; /* # of segs we may defer ack for now */
295 uint32_t tcp_rack_abs_max; /* # of segs we may defer ack ever */
296 timeout_id_t tcp_ack_tid; /* Delayed ACK timer ID */
297 timeout_id_t tcp_push_tid; /* Push timer ID */
298
299 uint32_t tcp_max_swnd; /* Maximum swnd we have seen */
300
301 struct tcp_s *tcp_listener; /* Our listener */
302
303 uint32_t tcp_irs; /* Initial recv seq num */
304 uint32_t tcp_fss; /* Final/fin send seq num */
305 uint32_t tcp_urg; /* Urgent data seq num */
306
307 clock_t tcp_first_timer_threshold; /* When to prod IP */
308 clock_t tcp_second_timer_threshold; /* When to give up completely */
309 clock_t tcp_first_ctimer_threshold; /* 1st threshold while connecting */
310 clock_t tcp_second_ctimer_threshold; /* 2nd ... while connecting */
311
312 uint32_t tcp_urp_last; /* Last urp for which signal sent */
313 mblk_t *tcp_urp_mp; /* T_EXDATA_IND for urgent byte */
314 mblk_t *tcp_urp_mark_mp; /* zero-length marked/unmarked msg */
315
316 int tcp_conn_req_cnt_q0; /* # of conn reqs in SYN_RCVD */
317 int tcp_conn_req_cnt_q; /* # of conn reqs in ESTABLISHED */
318 int tcp_conn_req_max; /* # of ESTABLISHED conn reqs allowed */
319 t_scalar_t tcp_conn_req_seqnum; /* Incrementing pending conn req ID */
320 #define tcp_ip_addr_cache tcp_reass_tail
321 /* Cache ip addresses that */
322 /* complete the 3-way handshake */
323 kmutex_t tcp_eager_lock;
324 struct tcp_s *tcp_eager_next_q; /* next eager in ESTABLISHED state */
325 struct tcp_s *tcp_eager_last_q; /* last eager in ESTABLISHED state */
326 struct tcp_s *tcp_eager_next_q0; /* next eager in SYN_RCVD state */
327 struct tcp_s *tcp_eager_prev_q0; /* prev eager in SYN_RCVD state */
328 /* all eagers form a circular list */
329 boolean_t tcp_conn_def_q0; /* move from q0 to q deferred */
330
331 union {
332 mblk_t *tcp_eager_conn_ind; /* T_CONN_IND waiting for 3rd ack. */
333 mblk_t *tcp_opts_conn_req; /* T_CONN_REQ w/ options processed */
334 } tcp_conn;
335 uint32_t tcp_syn_rcvd_timeout; /* How many SYN_RCVD timeout in q0 */
336
337 /* TCP Keepalive Timer members */
338 int32_t tcp_ka_last_intrvl; /* Last probe interval */
339 timeout_id_t tcp_ka_tid; /* Keepalive timer ID */
340 uint32_t tcp_ka_interval; /* Keepalive interval */
341 uint32_t tcp_ka_abort_thres; /* Keepalive abort threshold */
342
343 int32_t tcp_client_errno; /* How the client screwed up */
344
345 /*
346 * The header template lives in conn_ht_iphc allocated by tcp_build_hdrs
347 * We maintain three pointers into conn_ht_iphc.
348 */
349 ipha_t *tcp_ipha; /* IPv4 header in conn_ht_iphc */
350 ip6_t *tcp_ip6h; /* IPv6 header in conn_ht_iphc */
351 tcpha_t *tcp_tcpha; /* TCP header in conn_ht_iphc */
352
353 uint16_t tcp_last_sent_len; /* Record length for nagle */
354 uint16_t tcp_last_recv_len; /* Used by DTrace */
355 uint16_t tcp_dupack_cnt; /* # of consequtive duplicate acks */
356
357 kmutex_t *tcp_acceptor_lockp; /* Ptr to tf_lock */
358
359 mblk_t *tcp_ordrel_mp; /* T_ordrel_ind mblk */
360 t_uscalar_t tcp_acceptor_id; /* ACCEPTOR_id */
361
362 int tcp_ipsec_overhead;
363
364 uint_t tcp_recvifindex; /* Last received IPV6_RCVPKTINFO */
365 uint_t tcp_recvhops; /* Last received IPV6_RECVHOPLIMIT */
366 uint_t tcp_recvtclass; /* Last received IPV6_RECVTCLASS */
367 ip6_hbh_t *tcp_hopopts; /* Last received IPV6_RECVHOPOPTS */
368 ip6_dest_t *tcp_dstopts; /* Last received IPV6_RECVDSTOPTS */
369 ip6_dest_t *tcp_rthdrdstopts; /* Last recv IPV6_RECVRTHDRDSTOPTS */
370 ip6_rthdr_t *tcp_rthdr; /* Last received IPV6_RECVRTHDR */
371 uint_t tcp_hopoptslen;
372 uint_t tcp_dstoptslen;
373 uint_t tcp_rthdrdstoptslen;
374 uint_t tcp_rthdrlen;
375
376 mblk_t *tcp_timercache;
377
378 kmutex_t tcp_closelock;
379 kcondvar_t tcp_closecv;
380 uint8_t tcp_closed;
381 uint8_t tcp_closeflags;
382 mblk_t tcp_closemp;
383 timeout_id_t tcp_linger_tid; /* Linger timer ID */
384
385 struct tcp_s *tcp_acceptor_hash; /* Acceptor hash chain */
386 struct tcp_s **tcp_ptpahn; /* Pointer to previous accept hash next. */
387 struct tcp_s *tcp_bind_hash; /* Bind hash chain */
388 struct tcp_s *tcp_bind_hash_port; /* tcp_t's bound to the same lport */
389 struct tcp_s **tcp_ptpbhn;
390
391 uint_t tcp_maxpsz_multiplier;
392
393 uint32_t tcp_lso_max; /* maximum LSO payload */
394
395 uint32_t tcp_ofo_fin_seq; /* Recv out of order FIN seq num */
396 uint32_t tcp_cwr_snd_max;
397
398 struct tcp_s *tcp_saved_listener; /* saved value of listener */
399
400 uint32_t tcp_in_ack_unsent; /* ACK for unsent data cnt. */
401
402 /*
403 * All fusion-related fields are protected by squeue.
404 */
405 struct tcp_s *tcp_loopback_peer; /* peer tcp for loopback */
406 mblk_t *tcp_fused_sigurg_mp; /* M_PCSIG mblk for SIGURG */
407
408 uint32_t
409 tcp_fused : 1, /* loopback tcp in fusion mode */
410 tcp_unfusable : 1, /* fusion not allowed on endpoint */
411 tcp_fused_sigurg : 1, /* send SIGURG upon draining */
412
413 tcp_fuse_to_bit_31 : 29;
414
415 kmutex_t tcp_non_sq_lock;
416
417 /*
418 * This variable is accessed without any lock protection
419 * and therefore must not be declared as a bit field along
420 * with the rest which require such condition.
421 */
422 boolean_t tcp_issocket; /* this is a socket tcp */
423
424 /* protected by the tcp_non_sq_lock lock */
425 uint32_t tcp_squeue_bytes;
426
427 /*
428 * tcp_closemp_used is protected by listener's tcp_eager_lock
429 * when used for eagers. When used for a tcp in TIME_WAIT state
430 * or in tcp_close(), it is not protected by any lock as we
431 * do not expect any other thread to use it concurrently.
432 * We do allow re-use of tcp_closemp in tcp_time_wait_collector()
433 * and tcp_close() but not concurrently.
434 */
435 boolean_t tcp_closemp_used;
436
437 /*
438 * previous and next eagers in the list of droppable eagers. See
439 * the comments before MAKE_DROPPABLE(). These pointers are
440 * protected by listener's tcp_eager_lock.
441 */
442 struct tcp_s *tcp_eager_prev_drop_q0;
443 struct tcp_s *tcp_eager_next_drop_q0;
444
445 /*
446 * Have we flow controlled xmitter?
447 * This variable can be modified outside the squeue and hence must
448 * not be declared as a bit field along with the rest that are
449 * modified only within the squeue.
450 * protected by the tcp_non_sq_lock lock.
451 */
452 boolean_t tcp_flow_stopped;
453
454 /*
455 * Sender's next sequence number at the time the window was shrunk.
456 */
457 uint32_t tcp_snxt_shrunk;
458
459 /*
460 * Socket generation number which is bumped when a connection attempt
461 * is initiated. Its main purpose is to ensure that the socket does not
462 * miss the asynchronous connected/disconnected notification.
463 */
464 sock_connid_t tcp_connid;
465
466 /* mblk_t used to enter TCP's squeue from the service routine. */
467 mblk_t *tcp_rsrv_mp;
468 /* Mutex for accessing tcp_rsrv_mp */
469 kmutex_t tcp_rsrv_mp_lock;
470
471 /* For connection counting. */
472 struct tcp_listen_cnt_s *tcp_listen_cnt;
473
474 /* Segment reassembly timer. */
475 timeout_id_t tcp_reass_tid;
476
477 /* FIN-WAIT-2 flush timeout */
478 uint32_t tcp_fin_wait_2_flush_interval;
479
480 #ifdef DEBUG
481 pc_t tcmp_stk[15];
482 #endif
483 } tcp_t;
484
485 #ifdef DEBUG
486 #define TCP_DEBUG_GETPCSTACK(buffer, depth) ((void) getpcstack(buffer, \
487 depth))
488 #else
489 #define TCP_DEBUG_GETPCSTACK(buffer, depth)
490 #endif
491
492 extern void tcp_conn_reclaim(void *);
493 extern void tcp_free(tcp_t *tcp);
494 extern void tcp_ddi_g_init(void);
495 extern void tcp_ddi_g_destroy(void);
496 extern void *tcp_get_conn(void *arg, tcp_stack_t *);
497 extern mblk_t *tcp_snmp_get(queue_t *, mblk_t *, boolean_t);
498 extern int tcp_snmp_set(queue_t *, int, int, uchar_t *, int len);
499
500 /* Pad for the tf_t structure to avoid false cache line sharing. */
501 #define TF_CACHEL_PAD 64
502
503 /*
504 * The TCP Fanout structure for bind and acceptor hashes.
505 * The hash tables and their linkage (tcp_*_hash, tcp_ptp*hn) are
506 * protected by the per-bucket tf_lock. Each tcp_t
507 * inserted in the list points back at this lock using tcp_*_lockp.
508 *
509 * The bind and acceptor hash queues are lists of tcp_t.
510 */
511 /* listener hash and acceptor hash queue head */
512 typedef struct tf_s {
513 tcp_t *tf_tcp;
514 kmutex_t tf_lock;
515 unsigned char tf_pad[TF_CACHEL_PAD -
516 (sizeof (tcp_t *) + sizeof (kmutex_t))];
517 } tf_t;
518
519
520 /* Also used in ipclassifier.c */
521 extern struct kmem_cache *tcp_sack_info_cache;
522
523 #endif /* (defined(_KERNEL) || defined(_KMEMUSER)) */
524
525 /* Contract private interface between TCP and Clustering. */
526
527 #define CL_TCPI_V1 1 /* cl_tcpi_version number */
528
529 typedef struct cl_tcp_info_s {
530 ushort_t cl_tcpi_version; /* cl_tcp_info_t's version no */
531 ushort_t cl_tcpi_ipversion; /* IP version */
532 int32_t cl_tcpi_state; /* TCP state */
533 in_port_t cl_tcpi_lport; /* Local port */
534 in_port_t cl_tcpi_fport; /* Remote port */
535 in6_addr_t cl_tcpi_laddr_v6; /* Local IP address */
536 in6_addr_t cl_tcpi_faddr_v6; /* Remote IP address */
537 #ifdef _KERNEL
538 /* Note: V4_PART_OF_V6 is meant to be used only for _KERNEL defined stuff */
539 #define cl_tcpi_laddr V4_PART_OF_V6(cl_tcpi_laddr_v6)
540 #define cl_tcpi_faddr V4_PART_OF_V6(cl_tcpi_faddr_v6)
541
542 #endif /* _KERNEL */
543 } cl_tcp_info_t;
544
545 /*
546 * Hook functions to enable cluster networking
547 * On non-clustered systems these vectors must always be NULL.
548 */
549 extern void (*cl_inet_listen)(netstackid_t, uint8_t, sa_family_t,
550 uint8_t *, in_port_t, void *);
551 extern void (*cl_inet_unlisten)(netstackid_t, uint8_t, sa_family_t,
552 uint8_t *, in_port_t, void *);
553
554 /*
555 * Contracted Consolidation Private ioctl for aborting TCP connections.
556 * In order to keep the offsets and size of the structure the same between
557 * a 32-bit application and a 64-bit amd64 kernel, we use a #pragma
558 * pack(4).
559 */
560 #define TCP_IOC_ABORT_CONN (('T' << 8) + 91)
561
562 #if _LONG_LONG_ALIGNMENT == 8 && _LONG_LONG_ALIGNMENT_32 == 4
563 #pragma pack(4)
564 #endif
565
566 typedef struct tcp_ioc_abort_conn_s {
567 struct sockaddr_storage ac_local; /* local addr and port */
568 struct sockaddr_storage ac_remote; /* remote addr and port */
569 int32_t ac_start; /* start state */
570 int32_t ac_end; /* end state */
571 int32_t ac_zoneid; /* zoneid */
572 } tcp_ioc_abort_conn_t;
573
574 #if _LONG_LONG_ALIGNMENT == 8 && _LONG_LONG_ALIGNMENT_32 == 4
575 #pragma pack()
576 #endif
577
578 #ifdef __cplusplus
579 }
580 #endif
581
582 #endif /* _INET_TCP_H */