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 */ 24 /* Copyright (c) 1990 Mentat Inc. */ 25 26 #ifndef _INET_TCP_H 27 #define _INET_TCP_H 28 29 #ifdef __cplusplus 30 extern "C" { 31 #endif 32 33 #include <sys/inttypes.h> 34 #include <netinet/ip6.h> 35 #include <netinet/tcp.h> 36 #include <sys/socket.h> 37 #include <sys/socket_proto.h> 38 #include <sys/md5.h> 39 #include <inet/common.h> 40 #include <inet/ip.h> 41 #include <inet/ip6.h> 42 #include <inet/mi.h> 43 #include <inet/mib2.h> 44 #include <inet/tcp_stack.h> 45 #include <inet/tcp_sack.h> 46 #include <inet/kssl/ksslapi.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 clock_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 * Kernel SSL session information 428 */ 429 boolean_t tcp_kssl_pending; /* waiting for 1st SSL rec. */ 430 boolean_t tcp_kssl_inhandshake; /* during SSL handshake */ 431 kssl_ent_t tcp_kssl_ent; /* SSL table entry */ 432 kssl_ctx_t tcp_kssl_ctx; /* SSL session */ 433 434 /* 435 * tcp_closemp_used is protected by listener's tcp_eager_lock 436 * when used for eagers. When used for a tcp in TIME_WAIT state 437 * or in tcp_close(), it is not protected by any lock as we 438 * do not expect any other thread to use it concurrently. 439 * We do allow re-use of tcp_closemp in tcp_time_wait_collector() 440 * and tcp_close() but not concurrently. 441 */ 442 boolean_t tcp_closemp_used; 443 444 /* 445 * previous and next eagers in the list of droppable eagers. See 446 * the comments before MAKE_DROPPABLE(). These pointers are 447 * protected by listener's tcp_eager_lock. 448 */ 449 struct tcp_s *tcp_eager_prev_drop_q0; 450 struct tcp_s *tcp_eager_next_drop_q0; 451 452 /* 453 * Have we flow controlled xmitter? 454 * This variable can be modified outside the squeue and hence must 455 * not be declared as a bit field along with the rest that are 456 * modified only within the squeue. 457 * protected by the tcp_non_sq_lock lock. 458 */ 459 boolean_t tcp_flow_stopped; 460 461 /* 462 * Sender's next sequence number at the time the window was shrunk. 463 */ 464 uint32_t tcp_snxt_shrunk; 465 466 /* 467 * Socket generation number which is bumped when a connection attempt 468 * is initiated. Its main purpose is to ensure that the socket does not 469 * miss the asynchronous connected/disconnected notification. 470 */ 471 sock_connid_t tcp_connid; 472 473 /* mblk_t used to enter TCP's squeue from the service routine. */ 474 mblk_t *tcp_rsrv_mp; 475 /* Mutex for accessing tcp_rsrv_mp */ 476 kmutex_t tcp_rsrv_mp_lock; 477 478 /* For connection counting. */ 479 struct tcp_listen_cnt_s *tcp_listen_cnt; 480 481 /* Segment reassembly timer. */ 482 timeout_id_t tcp_reass_tid; 483 484 /* FIN-WAIT-2 flush timeout */ 485 uint32_t tcp_fin_wait_2_flush_interval; 486 487 #ifdef DEBUG 488 pc_t tcmp_stk[15]; 489 #endif 490 } tcp_t; 491 492 #ifdef DEBUG 493 #define TCP_DEBUG_GETPCSTACK(buffer, depth) ((void) getpcstack(buffer, \ 494 depth)) 495 #else 496 #define TCP_DEBUG_GETPCSTACK(buffer, depth) 497 #endif 498 499 extern void tcp_conn_reclaim(void *); 500 extern void tcp_free(tcp_t *tcp); 501 extern void tcp_ddi_g_init(void); 502 extern void tcp_ddi_g_destroy(void); 503 extern void *tcp_get_conn(void *arg, tcp_stack_t *); 504 extern mblk_t *tcp_snmp_get(queue_t *, mblk_t *); 505 extern int tcp_snmp_set(queue_t *, int, int, uchar_t *, int len); 506 507 /* 508 * The TCP Fanout structure for bind and acceptor hashes. 509 * The hash tables and their linkage (tcp_*_hash, tcp_ptp*hn) are 510 * protected by the per-bucket tf_lock. Each tcp_t 511 * inserted in the list points back at this lock using tcp_*_lockp. 512 * 513 * The bind and acceptor hash queues are lists of tcp_t. 514 */ 515 /* listener hash and acceptor hash queue head */ 516 typedef struct tf_s { 517 tcp_t *tf_tcp; 518 kmutex_t tf_lock; 519 } tf_t; 520 521 522 /* Also used in ipclassifier.c */ 523 extern struct kmem_cache *tcp_sack_info_cache; 524 525 #endif /* (defined(_KERNEL) || defined(_KMEMUSER)) */ 526 527 /* Contract private interface between TCP and Clustering. */ 528 529 #define CL_TCPI_V1 1 /* cl_tcpi_version number */ 530 531 typedef struct cl_tcp_info_s { 532 ushort_t cl_tcpi_version; /* cl_tcp_info_t's version no */ 533 ushort_t cl_tcpi_ipversion; /* IP version */ 534 int32_t cl_tcpi_state; /* TCP state */ 535 in_port_t cl_tcpi_lport; /* Local port */ 536 in_port_t cl_tcpi_fport; /* Remote port */ 537 in6_addr_t cl_tcpi_laddr_v6; /* Local IP address */ 538 in6_addr_t cl_tcpi_faddr_v6; /* Remote IP address */ 539 #ifdef _KERNEL 540 /* Note: V4_PART_OF_V6 is meant to be used only for _KERNEL defined stuff */ 541 #define cl_tcpi_laddr V4_PART_OF_V6(cl_tcpi_laddr_v6) 542 #define cl_tcpi_faddr V4_PART_OF_V6(cl_tcpi_faddr_v6) 543 544 #endif /* _KERNEL */ 545 } cl_tcp_info_t; 546 547 /* 548 * Hook functions to enable cluster networking 549 * On non-clustered systems these vectors must always be NULL. 550 */ 551 extern void (*cl_inet_listen)(netstackid_t, uint8_t, sa_family_t, 552 uint8_t *, in_port_t, void *); 553 extern void (*cl_inet_unlisten)(netstackid_t, uint8_t, sa_family_t, 554 uint8_t *, in_port_t, void *); 555 556 /* 557 * Contracted Consolidation Private ioctl for aborting TCP connections. 558 * In order to keep the offsets and size of the structure the same between 559 * a 32-bit application and a 64-bit amd64 kernel, we use a #pragma 560 * pack(4). 561 */ 562 #define TCP_IOC_ABORT_CONN (('T' << 8) + 91) 563 564 #if _LONG_LONG_ALIGNMENT == 8 && _LONG_LONG_ALIGNMENT_32 == 4 565 #pragma pack(4) 566 #endif 567 568 typedef struct tcp_ioc_abort_conn_s { 569 struct sockaddr_storage ac_local; /* local addr and port */ 570 struct sockaddr_storage ac_remote; /* remote addr and port */ 571 int32_t ac_start; /* start state */ 572 int32_t ac_end; /* end state */ 573 int32_t ac_zoneid; /* zoneid */ 574 } tcp_ioc_abort_conn_t; 575 576 #if _LONG_LONG_ALIGNMENT == 8 && _LONG_LONG_ALIGNMENT_32 == 4 577 #pragma pack() 578 #endif 579 580 #ifdef __cplusplus 581 } 582 #endif 583 584 #endif /* _INET_TCP_H */ 585