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 2006 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 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #ifdef __cplusplus 33 extern "C" { 34 #endif 35 36 #include <sys/inttypes.h> 37 #include <netinet/ip6.h> 38 #include <netinet/tcp.h> 39 #include <inet/tcp_sack.h> 40 #include <sys/socket.h> 41 #include <sys/multidata.h> 42 #include <inet/kssl/ksslapi.h> 43 44 /* 45 * Private (and possibly temporary) ioctl used by configuration code 46 * to lock in the "default" stream for detached closes. 47 */ 48 #define TCP_IOC_DEFAULT_Q (('T' << 8) + 51) 49 50 /* TCP states */ 51 #define TCPS_CLOSED -6 52 #define TCPS_IDLE -5 /* idle (opened, but not bound) */ 53 #define TCPS_BOUND -4 /* bound, ready to connect or accept */ 54 #define TCPS_LISTEN -3 /* listening for connection */ 55 #define TCPS_SYN_SENT -2 /* active, have sent syn */ 56 #define TCPS_SYN_RCVD -1 /* have received syn (and sent ours) */ 57 /* states < TCPS_ESTABLISHED are those where connections not established */ 58 #define TCPS_ESTABLISHED 0 /* established */ 59 #define TCPS_CLOSE_WAIT 1 /* rcvd fin, waiting for close */ 60 /* states > TCPS_CLOSE_WAIT are those where user has closed */ 61 #define TCPS_FIN_WAIT_1 2 /* have closed and sent fin */ 62 #define TCPS_CLOSING 3 /* closed, xchd FIN, await FIN ACK */ 63 #define TCPS_LAST_ACK 4 /* had fin and close; await FIN ACK */ 64 /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */ 65 #define TCPS_FIN_WAIT_2 5 /* have closed, fin is acked */ 66 #define TCPS_TIME_WAIT 6 /* in 2*msl quiet wait after close */ 67 68 /* 69 * Internal flags used in conjunction with the packet header flags. 70 * Used in tcp_rput_data to keep track of what needs to be done. 71 */ 72 #define TH_LIMIT_XMIT 0x0400 /* Limited xmit is needed */ 73 #define TH_XMIT_NEEDED 0x0800 /* Window opened - send queued data */ 74 #define TH_REXMIT_NEEDED 0x1000 /* Time expired for unacked data */ 75 #define TH_ACK_NEEDED 0x2000 /* Send an ack now. */ 76 #define TH_NEED_SACK_REXMIT 0x4000 /* Use SACK info to retransmission */ 77 #define TH_ACK_TIMER_NEEDED 0x8000 /* Start the delayed ACK timer */ 78 #define TH_ORDREL_NEEDED 0x10000 /* Generate an ordrel indication */ 79 #define TH_MARKNEXT_NEEDED 0x20000 /* Data should have MSGMARKNEXT */ 80 #define TH_SEND_URP_MARK 0x40000 /* Send up tcp_urp_mark_mp */ 81 82 /* 83 * TCP sequence numbers are 32 bit integers operated 84 * on with modular arithmetic. These macros can be 85 * used to compare such integers. 86 */ 87 #define SEQ_LT(a, b) ((int32_t)((a)-(b)) < 0) 88 #define SEQ_LEQ(a, b) ((int32_t)((a)-(b)) <= 0) 89 #define SEQ_GT(a, b) ((int32_t)((a)-(b)) > 0) 90 #define SEQ_GEQ(a, b) ((int32_t)((a)-(b)) >= 0) 91 92 /* TCP Protocol header */ 93 typedef struct tcphdr_s { 94 uint8_t th_lport[2]; /* Source port */ 95 uint8_t th_fport[2]; /* Destination port */ 96 uint8_t th_seq[4]; /* Sequence number */ 97 uint8_t th_ack[4]; /* Acknowledgement number */ 98 uint8_t th_offset_and_rsrvd[1]; /* Offset to the packet data */ 99 uint8_t th_flags[1]; 100 uint8_t th_win[2]; /* Allocation number */ 101 uint8_t th_sum[2]; /* TCP checksum */ 102 uint8_t th_urp[2]; /* Urgent pointer */ 103 } tcph_t; 104 105 #define TCP_HDR_LENGTH(tcph) (((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 (tcph_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) 115 116 #define TCPIP_HDR_LENGTH(mp, n) \ 117 (n) = IPH_HDR_LENGTH((mp)->b_rptr), \ 118 (n) += TCP_HDR_LENGTH((tcph_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; 134 135 /* 136 * Control structure for each open TCP stream, 137 * defined only within the kernel or for a kmem user. 138 * NOTE: tcp_reinit_values MUST have a line for each field in this structure! 139 */ 140 #if (defined(_KERNEL) || defined(_KMEMUSER)) 141 142 typedef struct tcp_s { 143 /* Pointer to previous bind hash next. */ 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 clock_t tcp_time_wait_expire; 149 struct conn_s *tcp_connp; 150 151 int32_t tcp_state; 152 int32_t tcp_rcv_ws; /* My window scale power */ 153 int32_t tcp_snd_ws; /* Sender's window scale power */ 154 uint32_t tcp_ts_recent; /* Timestamp of earliest unacked */ 155 /* data segment */ 156 clock_t tcp_rto; /* Round trip timeout */ 157 clock_t tcp_last_rcv_lbolt; 158 /* lbolt on last packet, used for PAWS */ 159 160 uint32_t tcp_snxt; /* Senders next seq num */ 161 uint32_t tcp_swnd; /* Senders window (relative to suna) */ 162 uint32_t tcp_mss; /* Max segment size */ 163 uint32_t tcp_iss; /* Initial send seq num */ 164 uint32_t tcp_rnxt; /* Seq we expect to recv next */ 165 uint32_t tcp_rwnd; 166 167 queue_t *tcp_rq; /* Our upstream neighbor (client) */ 168 queue_t *tcp_wq; /* Our downstream neighbor */ 169 170 /* Fields arranged in approximate access order along main paths */ 171 mblk_t *tcp_xmit_head; /* Head of rexmit list */ 172 mblk_t *tcp_xmit_last; /* last valid data seen by tcp_wput */ 173 mblk_t *tcp_xmit_tail; /* Last rexmit data sent */ 174 uint32_t tcp_unsent; /* # of bytes in hand that are unsent */ 175 uint32_t tcp_xmit_tail_unsent; /* # of unsent bytes in xmit_tail */ 176 177 uint32_t tcp_suna; /* Sender unacknowledged */ 178 uint32_t tcp_rexmit_nxt; /* Next rexmit seq num */ 179 uint32_t tcp_rexmit_max; /* Max retran seq num */ 180 int32_t tcp_snd_burst; /* Send burst factor */ 181 uint32_t tcp_cwnd; /* Congestion window */ 182 int32_t tcp_cwnd_cnt; /* cwnd cnt in congestion avoidance */ 183 184 uint32_t tcp_ibsegs; /* Inbound segments on this stream */ 185 uint32_t tcp_obsegs; /* Outbound segments on this stream */ 186 187 uint32_t tcp_naglim; /* Tunable nagle limit */ 188 uint32_t tcp_valid_bits; 189 #define TCP_ISS_VALID 0x1 /* Is the tcp_iss seq num active? */ 190 #define TCP_FSS_VALID 0x2 /* Is the tcp_fss seq num active? */ 191 #define TCP_URG_VALID 0x4 /* Is the tcp_urg seq num active? */ 192 #define TCP_OFO_FIN_VALID 0x8 /* Has TCP received an out of order FIN? */ 193 194 195 int32_t tcp_xmit_hiwater; /* Send buffer high water mark. */ 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 /* 203 * Following socket options are set by sockfs outside the squeue 204 * and we want to separate these bit fields from the other bit fields 205 * set by TCP to avoid grabbing locks. sockfs ensures that only one 206 * thread in sockfs can set a socket option at a time on a conn_t. 207 * However TCP may read these options concurrently. The linger option 208 * needs atomicity since tcp_lingertime also needs to be in sync. 209 * However TCP uses it only during close, and by then no socket option 210 * can come down. So we don't need any locks, instead just separating 211 * the sockfs settable bit fields from the other bit fields is 212 * sufficient. 213 */ 214 uint32_t 215 tcp_debug : 1, /* SO_DEBUG "socket" option. */ 216 tcp_dontroute : 1, /* SO_DONTROUTE "socket" option. */ 217 tcp_broadcast : 1, /* SO_BROADCAST "socket" option. */ 218 tcp_useloopback : 1, /* SO_USELOOPBACK "socket" option. */ 219 220 tcp_oobinline : 1, /* SO_OOBINLINE "socket" option. */ 221 tcp_dgram_errind : 1, /* SO_DGRAM_ERRIND option */ 222 tcp_linger : 1, /* SO_LINGER turned on */ 223 tcp_reuseaddr : 1, /* SO_REUSEADDR "socket" option. */ 224 225 tcp_junk_to_bit_31 : 24; 226 227 /* Following manipulated by TCP under squeue protection */ 228 uint32_t 229 tcp_urp_last_valid : 1, /* Is tcp_urp_last valid? */ 230 tcp_hard_binding : 1, /* If we've started a full bind */ 231 tcp_hard_bound : 1, /* If we've done a full bind with IP */ 232 tcp_fin_acked : 1, /* Has our FIN been acked? */ 233 234 tcp_fin_rcvd : 1, /* Have we seen a FIN? */ 235 tcp_fin_sent : 1, /* Have we sent our FIN yet? */ 236 tcp_ordrel_done : 1, /* Have we sent the ord_rel upstream? */ 237 tcp_flow_stopped : 1, /* Have we flow controlled xmitter? */ 238 239 tcp_detached : 1, /* If we're detached from a stream */ 240 tcp_bind_pending : 1, /* Client is waiting for bind ack */ 241 tcp_unbind_pending : 1, /* Client sent T_UNBIND_REQ */ 242 tcp_deferred_clean_death : 1, 243 /* defer tcp endpoint cleanup etc. */ 244 245 tcp_conn_def_q0: 1, /* move from q0 to q deferred */ 246 tcp_ka_enabled: 1, /* Connection KeepAlive Timer needed */ 247 tcp_zero_win_probe: 1, /* Zero win probing is in progress */ 248 tcp_loopback: 1, /* src and dst are the same machine */ 249 250 tcp_localnet: 1, /* src and dst are on the same subnet */ 251 tcp_syn_defense: 1, /* For defense against SYN attack */ 252 #define tcp_dontdrop tcp_syn_defense 253 tcp_set_timer : 1, 254 tcp_active_open: 1, /* This is a active open */ 255 256 tcp_timeout : 1, /* qbufcall failed, qtimeout pending */ 257 tcp_rexmit : 1, /* TCP is retransmitting */ 258 tcp_snd_sack_ok : 1, /* Can use SACK for this connection */ 259 tcp_empty_flag : 1, /* Empty flag for future use */ 260 261 tcp_recvdstaddr : 1, /* return T_EXTCONN_IND with dst addr */ 262 tcp_hwcksum : 1, /* The NIC is capable of hwcksum */ 263 tcp_ip_forward_progress : 1, 264 tcp_anon_priv_bind : 1, 265 266 tcp_ecn_ok : 1, /* Can use ECN for this connection */ 267 tcp_ecn_echo_on : 1, /* Need to do ECN echo */ 268 tcp_ecn_cwr_sent : 1, /* ECN_CWR has been sent */ 269 tcp_cwr : 1; /* Cwnd has reduced recently */ 270 271 /* Following manipulated by TCP under squeue protection */ 272 uint32_t 273 tcp_mdt : 1, /* Lower layer is capable of MDT */ 274 tcp_snd_ts_ok : 1, 275 tcp_snd_ws_ok : 1, 276 tcp_exclbind : 1, /* ``exclusive'' binding */ 277 278 tcp_reserved_port : 1, 279 tcp_hdr_grown : 1, 280 tcp_in_free_list : 1, 281 tcp_snd_zcopy_on : 1, /* xmit zero-copy enabled */ 282 283 tcp_snd_zcopy_aware : 1, /* client is zero-copy aware */ 284 tcp_xmit_zc_clean : 1, /* the xmit list is free of zc-mblk */ 285 tcp_wait_for_eagers : 1, /* Wait for eagers to disappear */ 286 tcp_accept_error : 1, /* Error during TLI accept */ 287 288 tcp_send_discon_ind : 1, /* TLI accept err, send discon ind */ 289 tcp_cork : 1, /* tcp_cork option */ 290 tcp_tconnind_started : 1, /* conn_ind message is being sent */ 291 tcp_pad_to_bit_31 : 17; 292 293 uint32_t tcp_if_mtu; /* Outgoing interface MTU. */ 294 295 mblk_t *tcp_reass_head; /* Out of order reassembly list head */ 296 mblk_t *tcp_reass_tail; /* Out of order reassembly list tail */ 297 298 tcp_sack_info_t *tcp_sack_info; 299 300 #define tcp_pipe tcp_sack_info->tcp_pipe 301 #define tcp_fack tcp_sack_info->tcp_fack 302 #define tcp_sack_snxt tcp_sack_info->tcp_sack_snxt 303 #define tcp_max_sack_blk tcp_sack_info->tcp_max_sack_blk 304 #define tcp_num_sack_blk tcp_sack_info->tcp_num_sack_blk 305 #define tcp_sack_list tcp_sack_info->tcp_sack_list 306 #define tcp_num_notsack_blk tcp_sack_info->tcp_num_notsack_blk 307 #define tcp_cnt_notsack_list tcp_sack_info->tcp_cnt_notsack_list 308 #define tcp_notsack_list tcp_sack_info->tcp_notsack_list 309 310 mblk_t *tcp_rcv_list; /* Queued until push, urgent data, */ 311 mblk_t *tcp_rcv_last_head; /* optdata, or the count exceeds */ 312 mblk_t *tcp_rcv_last_tail; /* tcp_rcv_push_wait. */ 313 uint32_t tcp_rcv_cnt; /* tcp_rcv_list is b_next chain. */ 314 315 uint32_t tcp_cwnd_ssthresh; /* Congestion window */ 316 uint32_t tcp_cwnd_max; 317 uint32_t tcp_csuna; /* Clear (no rexmits in window) suna */ 318 319 clock_t tcp_rtt_sa; /* Round trip smoothed average */ 320 clock_t tcp_rtt_sd; /* Round trip smoothed deviation */ 321 clock_t tcp_rtt_update; /* Round trip update(s) */ 322 clock_t tcp_ms_we_have_waited; /* Total retrans time */ 323 324 uint32_t tcp_swl1; /* These help us avoid using stale */ 325 uint32_t tcp_swl2; /* packets to update state */ 326 327 uint32_t tcp_rack; /* Seq # we have acked */ 328 uint32_t tcp_rack_cnt; /* # of segs we have deferred ack */ 329 uint32_t tcp_rack_cur_max; /* # of segs we may defer ack for now */ 330 uint32_t tcp_rack_abs_max; /* # of segs we may defer ack ever */ 331 timeout_id_t tcp_ack_tid; /* Delayed ACK timer ID */ 332 timeout_id_t tcp_push_tid; /* Push timer ID */ 333 334 uint32_t tcp_max_swnd; /* Maximum swnd we have seen */ 335 336 struct tcp_s *tcp_listener; /* Our listener */ 337 338 int32_t tcp_xmit_lowater; /* Send buffer low water mark. */ 339 340 uint32_t tcp_irs; /* Initial recv seq num */ 341 uint32_t tcp_fss; /* Final/fin send seq num */ 342 uint32_t tcp_urg; /* Urgent data seq num */ 343 344 clock_t tcp_first_timer_threshold; /* When to prod IP */ 345 clock_t tcp_second_timer_threshold; /* When to give up completely */ 346 clock_t tcp_first_ctimer_threshold; /* 1st threshold while connecting */ 347 clock_t tcp_second_ctimer_threshold; /* 2nd ... while connecting */ 348 349 int tcp_lingertime; /* Close linger time (in seconds) */ 350 351 uint32_t tcp_urp_last; /* Last urp for which signal sent */ 352 mblk_t *tcp_urp_mp; /* T_EXDATA_IND for urgent byte */ 353 mblk_t *tcp_urp_mark_mp; /* zero-length marked/unmarked msg */ 354 355 int tcp_conn_req_cnt_q0; /* # of conn reqs in SYN_RCVD */ 356 int tcp_conn_req_cnt_q; /* # of conn reqs in ESTABLISHED */ 357 int tcp_conn_req_max; /* # of ESTABLISHED conn reqs allowed */ 358 t_scalar_t tcp_conn_req_seqnum; /* Incrementing pending conn req ID */ 359 #define tcp_ip_addr_cache tcp_reass_tail 360 /* Cache ip addresses that */ 361 /* complete the 3-way handshake */ 362 kmutex_t tcp_eager_lock; 363 struct tcp_s *tcp_eager_next_q; /* next eager in ESTABLISHED state */ 364 struct tcp_s *tcp_eager_last_q; /* last eager in ESTABLISHED state */ 365 struct tcp_s *tcp_eager_next_q0; /* next eager in SYN_RCVD state */ 366 struct tcp_s *tcp_eager_prev_q0; /* prev eager in SYN_RCVD state */ 367 /* all eagers form a circular list */ 368 union { 369 mblk_t *tcp_eager_conn_ind; /* T_CONN_IND waiting for 3rd ack. */ 370 mblk_t *tcp_opts_conn_req; /* T_CONN_REQ w/ options processed */ 371 } tcp_conn; 372 uint32_t tcp_syn_rcvd_timeout; /* How many SYN_RCVD timeout in q0 */ 373 374 /* TCP Keepalive Timer members */ 375 int32_t tcp_ka_last_intrvl; /* Last probe interval */ 376 timeout_id_t tcp_ka_tid; /* Keepalive timer ID */ 377 uint32_t tcp_ka_interval; /* Keepalive interval */ 378 uint32_t tcp_ka_abort_thres; /* Keepalive abort threshold */ 379 380 int32_t tcp_client_errno; /* How the client screwed up */ 381 382 char *tcp_iphc; /* Buffer holding tcp/ip hdr template */ 383 int tcp_iphc_len; /* actual allocated buffer size */ 384 int32_t tcp_hdr_len; /* Byte len of combined TCP/IP hdr */ 385 ipha_t *tcp_ipha; /* IPv4 header in the buffer */ 386 ip6_t *tcp_ip6h; /* IPv6 header in the buffer */ 387 int tcp_ip_hdr_len; /* Byte len of our current IPvx hdr */ 388 tcph_t *tcp_tcph; /* tcp header within combined hdr */ 389 int32_t tcp_tcp_hdr_len; /* tcp header len within combined */ 390 391 uint32_t tcp_sum; /* checksum to compensate for source */ 392 /* routed packets. Host byte order */ 393 uint16_t tcp_last_sent_len; /* Record length for nagle */ 394 uint16_t tcp_dupack_cnt; /* # of consequtive duplicate acks */ 395 396 kmutex_t *tcp_acceptor_lockp; /* Ptr to tf_lock */ 397 398 timeout_id_t tcp_ordrelid; /* qbufcall/qtimeout id */ 399 t_uscalar_t tcp_acceptor_id; /* ACCEPTOR_id */ 400 401 int tcp_ipsec_overhead; 402 /* 403 * Address family that app wishes returned addrsses to be in. 404 * Currently taken from address family used in T_BIND_REQ, but 405 * should really come from family used in original socket() call. 406 * Value can be AF_INET or AF_INET6. 407 */ 408 uint_t tcp_family; 409 /* 410 * used for a quick test to determine if any ancillary bits are 411 * set 412 */ 413 uint_t tcp_ipv6_recvancillary; /* Flags */ 414 #define TCP_IPV6_RECVPKTINFO 0x01 /* IPV6_RECVPKTINFO option */ 415 #define TCP_IPV6_RECVHOPLIMIT 0x02 /* IPV6_RECVHOPLIMIT option */ 416 #define TCP_IPV6_RECVHOPOPTS 0x04 /* IPV6_RECVHOPOPTS option */ 417 #define TCP_IPV6_RECVDSTOPTS 0x08 /* IPV6_RECVDSTOPTS option */ 418 #define TCP_IPV6_RECVRTHDR 0x10 /* IPV6_RECVRTHDR option */ 419 #define TCP_IPV6_RECVRTDSTOPTS 0x20 /* IPV6_RECVRTHDRDSTOPTS option */ 420 #define TCP_IPV6_RECVTCLASS 0x40 /* IPV6_RECVTCLASS option */ 421 #define TCP_OLD_IPV6_RECVDSTOPTS 0x80 /* old IPV6_RECVDSTOPTS option */ 422 423 uint_t tcp_recvifindex; /* Last received IPV6_RCVPKTINFO */ 424 uint_t tcp_recvhops; /* Last received IPV6_RECVHOPLIMIT */ 425 uint_t tcp_recvtclass; /* Last received IPV6_RECVTCLASS */ 426 ip6_hbh_t *tcp_hopopts; /* Last received IPV6_RECVHOPOPTS */ 427 ip6_dest_t *tcp_dstopts; /* Last received IPV6_RECVDSTOPTS */ 428 ip6_dest_t *tcp_rtdstopts; /* Last recvd IPV6_RECVRTHDRDSTOPTS */ 429 ip6_rthdr_t *tcp_rthdr; /* Last received IPV6_RECVRTHDR */ 430 uint_t tcp_hopoptslen; 431 uint_t tcp_dstoptslen; 432 uint_t tcp_rtdstoptslen; 433 uint_t tcp_rthdrlen; 434 435 mblk_t *tcp_timercache; 436 cred_t *tcp_cred; /* Credentials when this was opened */ 437 pid_t tcp_cpid; /* Process id when this was opened */ 438 439 440 union { 441 struct { 442 uchar_t v4_ttl; 443 /* Dup of tcp_ipha.iph_type_of_service */ 444 uchar_t v4_tos; /* Dup of tcp_ipha.iph_ttl */ 445 } v4_hdr_info; 446 struct { 447 uint_t v6_vcf; /* Dup of tcp_ip6h.ip6h_vcf */ 448 uchar_t v6_hops; /* Dup of tcp_ip6h.ip6h_hops */ 449 } v6_hdr_info; 450 } tcp_hdr_info; 451 #define tcp_ttl tcp_hdr_info.v4_hdr_info.v4_ttl 452 #define tcp_tos tcp_hdr_info.v4_hdr_info.v4_tos 453 #define tcp_ip6_vcf tcp_hdr_info.v6_hdr_info.v6_vcf 454 #define tcp_ip6_hops tcp_hdr_info.v6_hdr_info.v6_hops 455 456 ushort_t tcp_ipversion; 457 uint_t tcp_bound_if; /* IPV6_BOUND_IF */ 458 459 #define tcp_lport tcp_connp->conn_lport 460 #define tcp_fport tcp_connp->conn_fport 461 #define tcp_ports tcp_connp->conn_ports 462 463 #define tcp_remote tcp_connp->conn_rem 464 #define tcp_ip_src tcp_connp->conn_src 465 466 #define tcp_remote_v6 tcp_connp->conn_remv6 467 #define tcp_ip_src_v6 tcp_connp->conn_srcv6 468 #define tcp_bound_source_v6 tcp_connp->conn_bound_source_v6 469 #define tcp_bound_source tcp_connp->conn_bound_source 470 471 kmutex_t tcp_closelock; 472 kcondvar_t tcp_closecv; 473 uint8_t tcp_closed; 474 uint8_t tcp_closeflags; 475 uint8_t tcp_cleandeathtag; 476 mblk_t tcp_closemp; 477 timeout_id_t tcp_linger_tid; /* Linger timer ID */ 478 void *tcp_tracebuf; 479 480 struct tcp_s *tcp_acceptor_hash; /* Acceptor hash chain */ 481 struct tcp_s **tcp_ptpahn; /* Pointer to previous accept hash next. */ 482 struct tcp_s *tcp_bind_hash; /* Bind hash chain */ 483 struct tcp_s **tcp_ptpbhn; 484 485 boolean_t tcp_ire_ill_check_done; 486 uint_t tcp_maxpsz; 487 488 /* 489 * used for Multidata Transmit 490 */ 491 uint_t tcp_mdt_hdr_head; /* leading header fragment extra space */ 492 uint_t tcp_mdt_hdr_tail; /* trailing header fragment extra space */ 493 int tcp_mdt_max_pld; /* maximum payload buffers per Multidata */ 494 495 uint32_t tcp_ofo_fin_seq; /* Recv out of order FIN seq num */ 496 uint32_t tcp_cwr_snd_max; 497 uint_t tcp_drop_opt_ack_cnt; /* # tcp generated optmgmt */ 498 ip6_pkt_t tcp_sticky_ipp; /* Sticky options */ 499 #define tcp_ipp_fields tcp_sticky_ipp.ipp_fields /* valid fields */ 500 #define tcp_ipp_ifindex tcp_sticky_ipp.ipp_ifindex /* pktinfo ifindex */ 501 #define tcp_ipp_addr tcp_sticky_ipp.ipp_addr /* pktinfo src/dst addr */ 502 #define tcp_ipp_hoplimit tcp_sticky_ipp.ipp_hoplimit 503 #define tcp_ipp_hopoptslen tcp_sticky_ipp.ipp_hopoptslen 504 #define tcp_ipp_rtdstoptslen tcp_sticky_ipp.ipp_rtdstoptslen 505 #define tcp_ipp_rthdrlen tcp_sticky_ipp.ipp_rthdrlen 506 #define tcp_ipp_dstoptslen tcp_sticky_ipp.ipp_dstoptslen 507 #define tcp_ipp_hopopts tcp_sticky_ipp.ipp_hopopts 508 #define tcp_ipp_rtdstopts tcp_sticky_ipp.ipp_rtdstopts 509 #define tcp_ipp_rthdr tcp_sticky_ipp.ipp_rthdr 510 #define tcp_ipp_dstopts tcp_sticky_ipp.ipp_dstopts 511 #define tcp_ipp_nexthop tcp_sticky_ipp.ipp_nexthop 512 #define tcp_ipp_use_min_mtu tcp_sticky_ipp.ipp_use_min_mtu 513 struct tcp_s *tcp_saved_listener; /* saved value of listener */ 514 515 uint32_t tcp_in_ack_unsent; /* ACK for unsent data cnt. */ 516 517 /* 518 * The following fusion-related fields are protected by squeue. 519 */ 520 struct tcp_s *tcp_loopback_peer; /* peer tcp for loopback */ 521 mblk_t *tcp_fused_sigurg_mp; /* M_PCSIG mblk for SIGURG */ 522 size_t tcp_fuse_rcv_hiwater; /* fusion receive queue size */ 523 uint_t tcp_fuse_rcv_unread_hiwater; /* max # of outstanding pkts */ 524 /* 525 * The following fusion-related fields and bit fields are to be 526 * manipulated with squeue protection or with tcp_fuse_lock held. 527 */ 528 kmutex_t tcp_fuse_lock; 529 kcondvar_t tcp_fuse_plugcv; 530 uint_t tcp_fuse_rcv_unread_cnt; /* # of outstanding pkts */ 531 uint32_t 532 tcp_fused : 1, /* loopback tcp in fusion mode */ 533 tcp_unfusable : 1, /* fusion not allowed on endpoint */ 534 tcp_fused_sigurg : 1, /* send SIGURG upon draining */ 535 tcp_direct_sockfs : 1, /* direct calls to sockfs */ 536 537 tcp_fuse_syncstr_stopped : 1, /* synchronous streams stopped */ 538 tcp_fuse_syncstr_plugged : 1, /* synchronous streams plugged */ 539 tcp_fuse_to_bit_31 : 26; 540 541 /* 542 * This variable is accessed without any lock protection 543 * and therefore must not be declared as a bit field along 544 * with the rest which require such condition. 545 */ 546 boolean_t tcp_issocket; /* this is a socket tcp */ 547 548 uint32_t tcp_squeue_bytes; 549 /* 550 * Kernel SSL session information 551 */ 552 boolean_t tcp_kssl_pending; /* waiting for 1st SSL rec. */ 553 boolean_t tcp_kssl_inhandshake; /* during SSL handshake */ 554 kssl_ent_t tcp_kssl_ent; /* SSL table entry */ 555 kssl_ctx_t tcp_kssl_ctx; /* SSL session */ 556 uint_t tcp_label_len; /* length of cached label */ 557 558 /* 559 * tcp_closemp_used is protected by listener's tcp_eager_lock 560 * when used for eagers. When used for a tcp in TIME_WAIT state 561 * or in tcp_close(), it is not protected by any lock as we 562 * do not expect any other thread to use it concurrently. 563 * Since we do allow re-use of tcp_closemp at certain places, 564 * tcp_closemp_used is declared as uint32_t instead of boolean_t 565 * to record any attempt to re-use tcp_closemp while it is still 566 * in use. This would facilitate debugging in non-debug kernels. 567 */ 568 uint32_t tcp_closemp_used; 569 570 /* 571 * previous and next eagers in the list of droppable eagers. See 572 * the comments before MAKE_DROPPABLE(). These pointers are 573 * protected by listener's tcp_eager_lock. 574 */ 575 struct tcp_s *tcp_eager_prev_drop_q0; 576 struct tcp_s *tcp_eager_next_drop_q0; 577 #ifdef DEBUG 578 pc_t tcmp_stk[15]; 579 #endif 580 } tcp_t; 581 582 #ifdef DEBUG 583 #define TCP_DEBUG_GETPCSTACK(buffer, depth) ((void) getpcstack(buffer, \ 584 depth)) 585 #else 586 #define TCP_DEBUG_GETPCSTACK(buffer, depth) 587 #endif 588 589 extern void tcp_free(tcp_t *tcp); 590 extern void tcp_ddi_init(void); 591 extern void tcp_ddi_destroy(void); 592 extern void tcp_xmit_listeners_reset(mblk_t *mp, uint_t ip_hdr_len, 593 zoneid_t zoneid); 594 extern void tcp_conn_request(void *arg, mblk_t *mp, void *arg2); 595 extern void tcp_conn_request_unbound(void *arg, mblk_t *mp, void *arg2); 596 extern void tcp_input(void *arg, mblk_t *mp, void *arg2); 597 extern void tcp_rput_data(void *arg, mblk_t *mp, void *arg2); 598 extern void *tcp_get_conn(void *arg); 599 extern void tcp_time_wait_collector(void *arg); 600 extern int tcp_snmp_get(queue_t *, mblk_t *); 601 extern int tcp_snmp_set(queue_t *, int, int, uchar_t *, int len); 602 extern mblk_t *tcp_xmit_mp(tcp_t *tcp, mblk_t *mp, int32_t max_to_send, 603 int32_t *offset, mblk_t **end_mp, uint32_t seq, 604 boolean_t sendall, uint32_t *seg_len, boolean_t rexmit); 605 /* 606 * The TCP Fanout structure. 607 * The hash tables and their linkage (tcp_*_hash_next, tcp_ptp*hn) are 608 * protected by the per-bucket tf_lock. Each tcp_t 609 * inserted in the list points back at this lock using tcp_*_lockp. 610 * 611 * The listener and acceptor hash queues are lists of tcp_t. 612 */ 613 614 /* listener hash and acceptor hash queue head */ 615 typedef struct tf_s { 616 tcp_t *tf_tcp; 617 kmutex_t tf_lock; 618 } tf_t; 619 620 extern mib2_tcp_t tcp_mib; 621 622 #endif /* (defined(_KERNEL) || defined(_KMEMUSER)) */ 623 624 /* Contract private interface between TCP and Clustering. */ 625 626 #define CL_TCPI_V1 1 /* cl_tcpi_version number */ 627 628 typedef struct cl_tcp_info_s { 629 ushort_t cl_tcpi_version; /* cl_tcp_info_t's version no */ 630 ushort_t cl_tcpi_ipversion; /* IP version */ 631 int32_t cl_tcpi_state; /* TCP state */ 632 in_port_t cl_tcpi_lport; /* Local port */ 633 in_port_t cl_tcpi_fport; /* Remote port */ 634 in6_addr_t cl_tcpi_laddr_v6; /* Local IP address */ 635 in6_addr_t cl_tcpi_faddr_v6; /* Remote IP address */ 636 #ifdef _KERNEL 637 /* Note: V4_PART_OF_V6 is meant to be used only for _KERNEL defined stuff */ 638 #define cl_tcpi_laddr V4_PART_OF_V6(cl_tcpi_laddr_v6) 639 #define cl_tcpi_faddr V4_PART_OF_V6(cl_tcpi_faddr_v6) 640 641 #endif /* _KERNEL */ 642 } cl_tcp_info_t; 643 644 /* 645 * Hook functions to enable cluster networking 646 * On non-clustered systems these vectors must always be NULL. 647 */ 648 649 extern void (*cl_inet_listen)(uint8_t, sa_family_t, uint8_t *, in_port_t); 650 extern void (*cl_inet_unlisten)(uint8_t, sa_family_t, uint8_t *, 651 in_port_t); 652 653 /* 654 * Contracted Consolidation Private ioctl for aborting TCP connections. 655 * In order to keep the offsets and size of the structure the same between 656 * a 32-bit application and a 64-bit amd64 kernel, we use a #pragma 657 * pack(4). 658 */ 659 #define TCP_IOC_ABORT_CONN (('T' << 8) + 91) 660 661 #if _LONG_LONG_ALIGNMENT == 8 && _LONG_LONG_ALIGNMENT_32 == 4 662 #pragma pack(4) 663 #endif 664 665 typedef struct tcp_ioc_abort_conn_s { 666 struct sockaddr_storage ac_local; /* local addr and port */ 667 struct sockaddr_storage ac_remote; /* remote addr and port */ 668 int32_t ac_start; /* start state */ 669 int32_t ac_end; /* end state */ 670 int32_t ac_zoneid; /* zoneid */ 671 } tcp_ioc_abort_conn_t; 672 673 #if _LONG_LONG_ALIGNMENT == 8 && _LONG_LONG_ALIGNMENT_32 == 4 674 #pragma pack() 675 #endif 676 677 #if (defined(_KERNEL) || defined(_KMEMUSER)) 678 extern void tcp_rput_other(tcp_t *tcp, mblk_t *mp); 679 #endif 680 681 #ifdef __cplusplus 682 } 683 #endif 684 685 #endif /* _INET_TCP_H */ 686