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 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 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 #include <inet/kssl/ksslapi.h> 48 49 /* TCP states */ 50 #define TCPS_CLOSED -6 51 #define TCPS_IDLE -5 /* idle (opened, but not bound) */ 52 #define TCPS_BOUND -4 /* bound, ready to connect or accept */ 53 #define TCPS_LISTEN -3 /* listening for connection */ 54 #define TCPS_SYN_SENT -2 /* active, have sent syn */ 55 #define TCPS_SYN_RCVD -1 /* have received syn (and sent ours) */ 56 /* states < TCPS_ESTABLISHED are those where connections not established */ 57 #define TCPS_ESTABLISHED 0 /* established */ 58 #define TCPS_CLOSE_WAIT 1 /* rcvd fin, waiting for close */ 59 /* states > TCPS_CLOSE_WAIT are those where user has closed */ 60 #define TCPS_FIN_WAIT_1 2 /* have closed and sent fin */ 61 #define TCPS_CLOSING 3 /* closed, xchd FIN, await FIN ACK */ 62 #define TCPS_LAST_ACK 4 /* had fin and close; await FIN ACK */ 63 /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */ 64 #define TCPS_FIN_WAIT_2 5 /* have closed, fin is acked */ 65 #define TCPS_TIME_WAIT 6 /* in 2*msl quiet wait after close */ 66 67 /* 68 * Internal flags used in conjunction with the packet header flags. 69 * Used in tcp_input_data to keep track of what needs to be done. 70 */ 71 #define TH_LIMIT_XMIT 0x0400 /* Limited xmit is needed */ 72 #define TH_XMIT_NEEDED 0x0800 /* Window opened - send queued data */ 73 #define TH_REXMIT_NEEDED 0x1000 /* Time expired for unacked data */ 74 #define TH_ACK_NEEDED 0x2000 /* Send an ack now. */ 75 #define TH_NEED_SACK_REXMIT 0x4000 /* Use SACK info to retransmission */ 76 #define TH_ACK_TIMER_NEEDED 0x8000 /* Start the delayed ACK timer */ 77 #define TH_ORDREL_NEEDED 0x10000 /* Generate an ordrel indication */ 78 #define TH_MARKNEXT_NEEDED 0x20000 /* Data should have MSGMARKNEXT */ 79 #define TH_SEND_URP_MARK 0x40000 /* Send up tcp_urp_mark_mp */ 80 81 /* 82 * TCP sequence numbers are 32 bit integers operated 83 * on with modular arithmetic. These macros can be 84 * used to compare such integers. 85 */ 86 #define SEQ_LT(a, b) ((int32_t)((a)-(b)) < 0) 87 #define SEQ_LEQ(a, b) ((int32_t)((a)-(b)) <= 0) 88 #define SEQ_GT(a, b) ((int32_t)((a)-(b)) > 0) 89 #define SEQ_GEQ(a, b) ((int32_t)((a)-(b)) >= 0) 90 91 /* TCP Protocol header */ 92 typedef struct tcphdr_s { 93 uint8_t th_lport[2]; /* Source port */ 94 uint8_t th_fport[2]; /* Destination port */ 95 uint8_t th_seq[4]; /* Sequence number */ 96 uint8_t th_ack[4]; /* Acknowledgement number */ 97 uint8_t th_offset_and_rsrvd[1]; /* Offset to the packet data */ 98 uint8_t th_flags[1]; 99 uint8_t th_win[2]; /* Allocation number */ 100 uint8_t th_sum[2]; /* TCP checksum */ 101 uint8_t th_urp[2]; /* Urgent pointer */ 102 } tcph_t; 103 104 #define TCP_HDR_LENGTH(tcph) \ 105 ((((tcph_t *)tcph)->th_offset_and_rsrvd[0] >>2) &(0xF << 2)) 106 #define TCP_MAX_COMBINED_HEADER_LENGTH (60 + 60) /* Maxed out ip + tcp */ 107 #define TCP_MAX_IP_OPTIONS_LENGTH (60 - IP_SIMPLE_HDR_LENGTH) 108 #define TCP_MAX_HDR_LENGTH 60 109 #define TCP_MAX_TCP_OPTIONS_LENGTH (60 - sizeof (tcpha_t)) 110 #define TCP_MIN_HEADER_LENGTH 20 111 #define TCP_MAXWIN 65535 112 #define TCP_PORT_LEN sizeof (in_port_t) 113 #define TCP_MAX_WINSHIFT 14 114 #define TCP_MAX_LARGEWIN (TCP_MAXWIN << TCP_MAX_WINSHIFT) 115 #define TCP_MAX_LSO_LENGTH (IP_MAXPACKET - TCP_MAX_COMBINED_HEADER_LENGTH) 116 117 #define TCPIP_HDR_LENGTH(mp, n) \ 118 (n) = IPH_HDR_LENGTH((mp)->b_rptr), \ 119 (n) += TCP_HDR_LENGTH((tcpha_t *)&(mp)->b_rptr[(n)]) 120 121 /* TCP Protocol header (used if the header is known to be 32-bit aligned) */ 122 typedef struct tcphdra_s { 123 in_port_t tha_lport; /* Source port */ 124 in_port_t tha_fport; /* Destination port */ 125 uint32_t tha_seq; /* Sequence number */ 126 uint32_t tha_ack; /* Acknowledgement number */ 127 uint8_t tha_offset_and_reserved; /* Offset to the packet data */ 128 uint8_t tha_flags; 129 uint16_t tha_win; /* Allocation number */ 130 uint16_t tha_sum; /* TCP checksum */ 131 uint16_t tha_urp; /* Urgent pointer */ 132 } tcpha_t; 133 134 struct conn_s; 135 struct tcp_listen_cnt_s; 136 137 /* 138 * Control structure for each open TCP stream, 139 * defined only within the kernel or for a kmem user. 140 * NOTE: tcp_reinit_values MUST have a line for each field in this structure! 141 */ 142 #if (defined(_KERNEL) || defined(_KMEMUSER)) 143 144 typedef struct tcp_s { 145 /* Pointer to previous bind hash next. */ 146 struct tcp_s *tcp_time_wait_next; 147 /* Pointer to next T/W block */ 148 struct tcp_s *tcp_time_wait_prev; 149 /* Pointer to previous T/W next */ 150 clock_t tcp_time_wait_expire; 151 152 struct conn_s *tcp_connp; 153 tcp_stack_t *tcp_tcps; /* Shortcut via conn_netstack */ 154 155 int32_t tcp_state; 156 int32_t tcp_rcv_ws; /* My window scale power */ 157 int32_t tcp_snd_ws; /* Sender's window scale power */ 158 uint32_t tcp_ts_recent; /* Timestamp of earliest unacked */ 159 /* data segment */ 160 clock_t tcp_rto; /* Round trip timeout */ 161 clock_t tcp_last_rcv_lbolt; 162 /* lbolt on last packet, used for PAWS */ 163 164 uint32_t tcp_snxt; /* Senders next seq num */ 165 uint32_t tcp_swnd; /* Senders window (relative to suna) */ 166 uint32_t tcp_mss; /* Max segment size */ 167 uint32_t tcp_iss; /* Initial send seq num */ 168 uint32_t tcp_rnxt; /* Seq we expect to recv next */ 169 uint32_t tcp_rwnd; 170 171 /* Fields arranged in approximate access order along main paths */ 172 mblk_t *tcp_xmit_head; /* Head of rexmit list */ 173 mblk_t *tcp_xmit_last; /* last valid data seen by tcp_wput */ 174 mblk_t *tcp_xmit_tail; /* Last rexmit data sent */ 175 uint32_t tcp_unsent; /* # of bytes in hand that are unsent */ 176 uint32_t tcp_xmit_tail_unsent; /* # of unsent bytes in xmit_tail */ 177 178 uint32_t tcp_suna; /* Sender unacknowledged */ 179 uint32_t tcp_rexmit_nxt; /* Next rexmit seq num */ 180 uint32_t tcp_rexmit_max; /* Max retran seq num */ 181 int32_t tcp_snd_burst; /* Send burst factor */ 182 uint32_t tcp_cwnd; /* Congestion window */ 183 int32_t tcp_cwnd_cnt; /* cwnd cnt in congestion avoidance */ 184 185 uint32_t tcp_ibsegs; /* Inbound segments on this stream */ 186 uint32_t tcp_obsegs; /* Outbound segments on this stream */ 187 188 uint32_t tcp_naglim; /* Tunable nagle limit */ 189 uint32_t tcp_valid_bits; 190 #define TCP_ISS_VALID 0x1 /* Is the tcp_iss seq num active? */ 191 #define TCP_FSS_VALID 0x2 /* Is the tcp_fss seq num active? */ 192 #define TCP_URG_VALID 0x4 /* Is the tcp_urg seq num active? */ 193 #define TCP_OFO_FIN_VALID 0x8 /* Has TCP received an out of order FIN? */ 194 195 196 197 timeout_id_t tcp_timer_tid; /* Control block for timer service */ 198 uchar_t tcp_timer_backoff; /* Backoff shift count. */ 199 int64_t tcp_last_recv_time; /* Last time we receive a segment. */ 200 uint32_t tcp_init_cwnd; /* Initial cwnd (start/restart) */ 201 202 /* Following manipulated by TCP under squeue protection */ 203 uint32_t 204 tcp_urp_last_valid : 1, /* Is tcp_urp_last valid? */ 205 tcp_hard_binding : 1, /* TCP_DETACHED_NONEAGER */ 206 tcp_fin_acked : 1, /* Has our FIN been acked? */ 207 tcp_fin_rcvd : 1, /* Have we seen a FIN? */ 208 209 tcp_fin_sent : 1, /* Have we sent our FIN yet? */ 210 tcp_ordrel_done : 1, /* Have we sent the ord_rel upstream? */ 211 tcp_detached : 1, /* If we're detached from a stream */ 212 tcp_zero_win_probe: 1, /* Zero win probing is in progress */ 213 214 tcp_loopback: 1, /* src and dst are the same machine */ 215 tcp_localnet: 1, /* src and dst are on the same subnet */ 216 tcp_syn_defense: 1, /* For defense against SYN attack */ 217 #define tcp_dontdrop tcp_syn_defense 218 tcp_set_timer : 1, 219 220 tcp_active_open: 1, /* This is a active open */ 221 tcp_rexmit : 1, /* TCP is retransmitting */ 222 tcp_snd_sack_ok : 1, /* Can use SACK for this connection */ 223 tcp_hwcksum : 1, /* The NIC is capable of hwcksum */ 224 225 tcp_ip_forward_progress : 1, 226 tcp_ecn_ok : 1, /* Can use ECN for this connection */ 227 tcp_ecn_echo_on : 1, /* Need to do ECN echo */ 228 tcp_ecn_cwr_sent : 1, /* ECN_CWR has been sent */ 229 230 tcp_cwr : 1, /* Cwnd has reduced recently */ 231 232 tcp_pad_to_bit31 : 11; 233 234 /* Following manipulated by TCP under squeue protection */ 235 uint32_t 236 tcp_snd_ts_ok : 1, 237 tcp_snd_ws_ok : 1, 238 tcp_reserved_port : 1, 239 tcp_in_free_list : 1, 240 241 tcp_snd_zcopy_on : 1, /* xmit zero-copy enabled */ 242 tcp_snd_zcopy_aware : 1, /* client is zero-copy aware */ 243 tcp_xmit_zc_clean : 1, /* the xmit list is free of zc-mblk */ 244 tcp_wait_for_eagers : 1, /* Wait for eagers to disappear */ 245 246 tcp_accept_error : 1, /* Error during TLI accept */ 247 tcp_send_discon_ind : 1, /* TLI accept err, send discon ind */ 248 tcp_cork : 1, /* tcp_cork option */ 249 tcp_tconnind_started : 1, /* conn_ind message is being sent */ 250 251 tcp_lso :1, /* Lower layer is capable of LSO */ 252 tcp_is_wnd_shrnk : 1, /* Window has shrunk */ 253 254 tcp_pad_to_bit_31 : 18; 255 256 uint32_t tcp_initial_pmtu; /* Initial outgoing Path MTU. */ 257 258 mblk_t *tcp_reass_head; /* Out of order reassembly list head */ 259 mblk_t *tcp_reass_tail; /* Out of order reassembly list tail */ 260 261 tcp_sack_info_t *tcp_sack_info; 262 263 #define tcp_pipe tcp_sack_info->tcp_pipe 264 #define tcp_fack tcp_sack_info->tcp_fack 265 #define tcp_sack_snxt tcp_sack_info->tcp_sack_snxt 266 #define tcp_max_sack_blk tcp_sack_info->tcp_max_sack_blk 267 #define tcp_num_sack_blk tcp_sack_info->tcp_num_sack_blk 268 #define tcp_sack_list tcp_sack_info->tcp_sack_list 269 #define tcp_num_notsack_blk tcp_sack_info->tcp_num_notsack_blk 270 #define tcp_cnt_notsack_list tcp_sack_info->tcp_cnt_notsack_list 271 #define tcp_notsack_list tcp_sack_info->tcp_notsack_list 272 273 mblk_t *tcp_rcv_list; /* Queued until push, urgent data, */ 274 mblk_t *tcp_rcv_last_head; /* optdata, or the count exceeds */ 275 mblk_t *tcp_rcv_last_tail; /* tcp_rcv_push_wait. */ 276 uint32_t tcp_rcv_cnt; /* tcp_rcv_list is b_next chain. */ 277 278 uint32_t tcp_cwnd_ssthresh; /* Congestion window */ 279 uint32_t tcp_cwnd_max; 280 uint32_t tcp_csuna; /* Clear (no rexmits in window) suna */ 281 282 clock_t tcp_rtt_sa; /* Round trip smoothed average */ 283 clock_t tcp_rtt_sd; /* Round trip smoothed deviation */ 284 clock_t tcp_rtt_update; /* Round trip update(s) */ 285 clock_t tcp_ms_we_have_waited; /* Total retrans time */ 286 287 uint32_t tcp_swl1; /* These help us avoid using stale */ 288 uint32_t tcp_swl2; /* packets to update state */ 289 290 uint32_t tcp_rack; /* Seq # we have acked */ 291 uint32_t tcp_rack_cnt; /* # of segs we have deferred ack */ 292 uint32_t tcp_rack_cur_max; /* # of segs we may defer ack for now */ 293 uint32_t tcp_rack_abs_max; /* # of segs we may defer ack ever */ 294 timeout_id_t tcp_ack_tid; /* Delayed ACK timer ID */ 295 timeout_id_t tcp_push_tid; /* Push timer ID */ 296 297 uint32_t tcp_max_swnd; /* Maximum swnd we have seen */ 298 299 struct tcp_s *tcp_listener; /* Our listener */ 300 301 uint32_t tcp_irs; /* Initial recv seq num */ 302 uint32_t tcp_fss; /* Final/fin send seq num */ 303 uint32_t tcp_urg; /* Urgent data seq num */ 304 305 clock_t tcp_first_timer_threshold; /* When to prod IP */ 306 clock_t tcp_second_timer_threshold; /* When to give up completely */ 307 clock_t tcp_first_ctimer_threshold; /* 1st threshold while connecting */ 308 clock_t tcp_second_ctimer_threshold; /* 2nd ... while connecting */ 309 310 uint32_t tcp_urp_last; /* Last urp for which signal sent */ 311 mblk_t *tcp_urp_mp; /* T_EXDATA_IND for urgent byte */ 312 mblk_t *tcp_urp_mark_mp; /* zero-length marked/unmarked msg */ 313 314 int tcp_conn_req_cnt_q0; /* # of conn reqs in SYN_RCVD */ 315 int tcp_conn_req_cnt_q; /* # of conn reqs in ESTABLISHED */ 316 int tcp_conn_req_max; /* # of ESTABLISHED conn reqs allowed */ 317 t_scalar_t tcp_conn_req_seqnum; /* Incrementing pending conn req ID */ 318 #define tcp_ip_addr_cache tcp_reass_tail 319 /* Cache ip addresses that */ 320 /* complete the 3-way handshake */ 321 kmutex_t tcp_eager_lock; 322 struct tcp_s *tcp_eager_next_q; /* next eager in ESTABLISHED state */ 323 struct tcp_s *tcp_eager_last_q; /* last eager in ESTABLISHED state */ 324 struct tcp_s *tcp_eager_next_q0; /* next eager in SYN_RCVD state */ 325 struct tcp_s *tcp_eager_prev_q0; /* prev eager in SYN_RCVD state */ 326 /* all eagers form a circular list */ 327 boolean_t tcp_conn_def_q0; /* move from q0 to q deferred */ 328 329 union { 330 mblk_t *tcp_eager_conn_ind; /* T_CONN_IND waiting for 3rd ack. */ 331 mblk_t *tcp_opts_conn_req; /* T_CONN_REQ w/ options processed */ 332 } tcp_conn; 333 uint32_t tcp_syn_rcvd_timeout; /* How many SYN_RCVD timeout in q0 */ 334 335 /* TCP Keepalive Timer members */ 336 int32_t tcp_ka_last_intrvl; /* Last probe interval */ 337 timeout_id_t tcp_ka_tid; /* Keepalive timer ID */ 338 uint32_t tcp_ka_interval; /* Keepalive interval */ 339 uint32_t tcp_ka_abort_thres; /* Keepalive abort threshold */ 340 341 int32_t tcp_client_errno; /* How the client screwed up */ 342 343 /* 344 * The header template lives in conn_ht_iphc allocated by tcp_build_hdrs 345 * We maintain three pointers into conn_ht_iphc. 346 */ 347 ipha_t *tcp_ipha; /* IPv4 header in conn_ht_iphc */ 348 ip6_t *tcp_ip6h; /* IPv6 header in conn_ht_iphc */ 349 tcpha_t *tcp_tcpha; /* TCP header in conn_ht_iphc */ 350 351 uint16_t tcp_last_sent_len; /* Record length for nagle */ 352 uint16_t tcp_dupack_cnt; /* # of consequtive duplicate acks */ 353 354 kmutex_t *tcp_acceptor_lockp; /* Ptr to tf_lock */ 355 356 mblk_t *tcp_ordrel_mp; /* T_ordrel_ind mblk */ 357 t_uscalar_t tcp_acceptor_id; /* ACCEPTOR_id */ 358 359 int tcp_ipsec_overhead; 360 361 uint_t tcp_recvifindex; /* Last received IPV6_RCVPKTINFO */ 362 uint_t tcp_recvhops; /* Last received IPV6_RECVHOPLIMIT */ 363 uint_t tcp_recvtclass; /* Last received IPV6_RECVTCLASS */ 364 ip6_hbh_t *tcp_hopopts; /* Last received IPV6_RECVHOPOPTS */ 365 ip6_dest_t *tcp_dstopts; /* Last received IPV6_RECVDSTOPTS */ 366 ip6_dest_t *tcp_rthdrdstopts; /* Last recv IPV6_RECVRTHDRDSTOPTS */ 367 ip6_rthdr_t *tcp_rthdr; /* Last received IPV6_RECVRTHDR */ 368 uint_t tcp_hopoptslen; 369 uint_t tcp_dstoptslen; 370 uint_t tcp_rthdrdstoptslen; 371 uint_t tcp_rthdrlen; 372 373 mblk_t *tcp_timercache; 374 375 kmutex_t tcp_closelock; 376 kcondvar_t tcp_closecv; 377 uint8_t tcp_closed; 378 uint8_t tcp_closeflags; 379 uint8_t tcp_cleandeathtag; 380 mblk_t tcp_closemp; 381 timeout_id_t tcp_linger_tid; /* Linger timer ID */ 382 383 struct tcp_s *tcp_acceptor_hash; /* Acceptor hash chain */ 384 struct tcp_s **tcp_ptpahn; /* Pointer to previous accept hash next. */ 385 struct tcp_s *tcp_bind_hash; /* Bind hash chain */ 386 struct tcp_s *tcp_bind_hash_port; /* tcp_t's bound to the same lport */ 387 struct tcp_s **tcp_ptpbhn; 388 389 uint_t tcp_maxpsz_multiplier; 390 391 uint32_t tcp_lso_max; /* maximum LSO payload */ 392 393 uint32_t tcp_ofo_fin_seq; /* Recv out of order FIN seq num */ 394 uint32_t tcp_cwr_snd_max; 395 396 struct tcp_s *tcp_saved_listener; /* saved value of listener */ 397 398 uint32_t tcp_in_ack_unsent; /* ACK for unsent data cnt. */ 399 400 /* 401 * All fusion-related fields are protected by squeue. 402 */ 403 struct tcp_s *tcp_loopback_peer; /* peer tcp for loopback */ 404 mblk_t *tcp_fused_sigurg_mp; /* M_PCSIG mblk for SIGURG */ 405 406 uint32_t 407 tcp_fused : 1, /* loopback tcp in fusion mode */ 408 tcp_unfusable : 1, /* fusion not allowed on endpoint */ 409 tcp_fused_sigurg : 1, /* send SIGURG upon draining */ 410 411 tcp_fuse_to_bit_31 : 29; 412 413 kmutex_t tcp_non_sq_lock; 414 415 /* 416 * This variable is accessed without any lock protection 417 * and therefore must not be declared as a bit field along 418 * with the rest which require such condition. 419 */ 420 boolean_t tcp_issocket; /* this is a socket tcp */ 421 422 /* protected by the tcp_non_sq_lock lock */ 423 uint32_t tcp_squeue_bytes; 424 /* 425 * Kernel SSL session information 426 */ 427 boolean_t tcp_kssl_pending; /* waiting for 1st SSL rec. */ 428 boolean_t tcp_kssl_inhandshake; /* during SSL handshake */ 429 kssl_ent_t tcp_kssl_ent; /* SSL table entry */ 430 kssl_ctx_t tcp_kssl_ctx; /* SSL session */ 431 432 /* 433 * tcp_closemp_used is protected by listener's tcp_eager_lock 434 * when used for eagers. When used for a tcp in TIME_WAIT state 435 * or in tcp_close(), it is not protected by any lock as we 436 * do not expect any other thread to use it concurrently. 437 * We do allow re-use of tcp_closemp in tcp_time_wait_collector() 438 * and tcp_close() but not concurrently. 439 */ 440 boolean_t tcp_closemp_used; 441 442 /* 443 * previous and next eagers in the list of droppable eagers. See 444 * the comments before MAKE_DROPPABLE(). These pointers are 445 * protected by listener's tcp_eager_lock. 446 */ 447 struct tcp_s *tcp_eager_prev_drop_q0; 448 struct tcp_s *tcp_eager_next_drop_q0; 449 450 /* 451 * Have we flow controlled xmitter? 452 * This variable can be modified outside the squeue and hence must 453 * not be declared as a bit field along with the rest that are 454 * modified only within the squeue. 455 * protected by the tcp_non_sq_lock lock. 456 */ 457 boolean_t tcp_flow_stopped; 458 459 /* 460 * Sender's next sequence number at the time the window was shrunk. 461 */ 462 uint32_t tcp_snxt_shrunk; 463 464 /* 465 * Socket generation number which is bumped when a connection attempt 466 * is initiated. Its main purpose is to ensure that the socket does not 467 * miss the asynchronous connected/disconnected notification. 468 */ 469 sock_connid_t tcp_connid; 470 471 /* mblk_t used to enter TCP's squeue from the service routine. */ 472 mblk_t *tcp_rsrv_mp; 473 /* Mutex for accessing tcp_rsrv_mp */ 474 kmutex_t tcp_rsrv_mp_lock; 475 476 /* For connection counting. */ 477 struct tcp_listen_cnt_s *tcp_listen_cnt; 478 479 /* Segment reassembly timer. */ 480 timeout_id_t tcp_reass_tid; 481 482 #ifdef DEBUG 483 pc_t tcmp_stk[15]; 484 #endif 485 } tcp_t; 486 487 #ifdef DEBUG 488 #define TCP_DEBUG_GETPCSTACK(buffer, depth) ((void) getpcstack(buffer, \ 489 depth)) 490 #else 491 #define TCP_DEBUG_GETPCSTACK(buffer, depth) 492 #endif 493 494 extern void tcp_conn_reclaim(void *); 495 extern void tcp_free(tcp_t *tcp); 496 extern void tcp_ddi_g_init(void); 497 extern void tcp_ddi_g_destroy(void); 498 extern void tcp_xmit_listeners_reset(mblk_t *, ip_recv_attr_t *, 499 ip_stack_t *, conn_t *); 500 extern void tcp_input_listener(void *arg, mblk_t *mp, void *arg2, 501 ip_recv_attr_t *); 502 extern void tcp_input_listener_unbound(void *arg, mblk_t *mp, void *arg2, 503 ip_recv_attr_t *); 504 extern void tcp_input_data(void *arg, mblk_t *mp, void *arg2, 505 ip_recv_attr_t *); 506 extern void *tcp_get_conn(void *arg, tcp_stack_t *); 507 extern void tcp_time_wait_collector(void *arg); 508 extern mblk_t *tcp_snmp_get(queue_t *, mblk_t *); 509 extern int tcp_snmp_set(queue_t *, int, int, uchar_t *, int len); 510 extern mblk_t *tcp_xmit_mp(tcp_t *tcp, mblk_t *mp, int32_t max_to_send, 511 int32_t *offset, mblk_t **end_mp, uint32_t seq, 512 boolean_t sendall, uint32_t *seg_len, boolean_t rexmit); 513 514 /* 515 * The TCP Fanout structure. 516 * The hash tables and their linkage (tcp_*_hash_next, tcp_ptp*hn) are 517 * protected by the per-bucket tf_lock. Each tcp_t 518 * inserted in the list points back at this lock using tcp_*_lockp. 519 * 520 * The listener and acceptor hash queues are lists of tcp_t. 521 */ 522 /* listener hash and acceptor hash queue head */ 523 typedef struct tf_s { 524 tcp_t *tf_tcp; 525 kmutex_t tf_lock; 526 } tf_t; 527 #endif /* (defined(_KERNEL) || defined(_KMEMUSER)) */ 528 529 /* Contract private interface between TCP and Clustering. */ 530 531 #define CL_TCPI_V1 1 /* cl_tcpi_version number */ 532 533 typedef struct cl_tcp_info_s { 534 ushort_t cl_tcpi_version; /* cl_tcp_info_t's version no */ 535 ushort_t cl_tcpi_ipversion; /* IP version */ 536 int32_t cl_tcpi_state; /* TCP state */ 537 in_port_t cl_tcpi_lport; /* Local port */ 538 in_port_t cl_tcpi_fport; /* Remote port */ 539 in6_addr_t cl_tcpi_laddr_v6; /* Local IP address */ 540 in6_addr_t cl_tcpi_faddr_v6; /* Remote IP address */ 541 #ifdef _KERNEL 542 /* Note: V4_PART_OF_V6 is meant to be used only for _KERNEL defined stuff */ 543 #define cl_tcpi_laddr V4_PART_OF_V6(cl_tcpi_laddr_v6) 544 #define cl_tcpi_faddr V4_PART_OF_V6(cl_tcpi_faddr_v6) 545 546 #endif /* _KERNEL */ 547 } cl_tcp_info_t; 548 549 /* 550 * Hook functions to enable cluster networking 551 * On non-clustered systems these vectors must always be NULL. 552 */ 553 extern void (*cl_inet_listen)(netstackid_t, uint8_t, sa_family_t, 554 uint8_t *, in_port_t, void *); 555 extern void (*cl_inet_unlisten)(netstackid_t, uint8_t, sa_family_t, 556 uint8_t *, in_port_t, void *); 557 558 /* 559 * Contracted Consolidation Private ioctl for aborting TCP connections. 560 * In order to keep the offsets and size of the structure the same between 561 * a 32-bit application and a 64-bit amd64 kernel, we use a #pragma 562 * pack(4). 563 */ 564 #define TCP_IOC_ABORT_CONN (('T' << 8) + 91) 565 566 #if _LONG_LONG_ALIGNMENT == 8 && _LONG_LONG_ALIGNMENT_32 == 4 567 #pragma pack(4) 568 #endif 569 570 typedef struct tcp_ioc_abort_conn_s { 571 struct sockaddr_storage ac_local; /* local addr and port */ 572 struct sockaddr_storage ac_remote; /* remote addr and port */ 573 int32_t ac_start; /* start state */ 574 int32_t ac_end; /* end state */ 575 int32_t ac_zoneid; /* zoneid */ 576 } tcp_ioc_abort_conn_t; 577 578 #if _LONG_LONG_ALIGNMENT == 8 && _LONG_LONG_ALIGNMENT_32 == 4 579 #pragma pack() 580 #endif 581 582 #ifdef __cplusplus 583 } 584 #endif 585 586 #endif /* _INET_TCP_H */ 587