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 #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((tcph_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; 135 136 /* 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 /* Pointer to previous bind hash next. */ 145 struct tcp_s *tcp_time_wait_next; 146 /* Pointer to next T/W block */ 147 struct tcp_s *tcp_time_wait_prev; 148 /* Pointer to previous T/W next */ 149 clock_t tcp_time_wait_expire; 150 struct conn_s *tcp_connp; 151 152 int32_t tcp_state; 153 int32_t tcp_rcv_ws; /* My window scale power */ 154 int32_t tcp_snd_ws; /* Sender's window scale power */ 155 uint32_t tcp_ts_recent; /* Timestamp of earliest unacked */ 156 /* data segment */ 157 clock_t tcp_rto; /* Round trip timeout */ 158 clock_t tcp_last_rcv_lbolt; 159 /* lbolt on last packet, used for PAWS */ 160 161 uint32_t tcp_snxt; /* Senders next seq num */ 162 uint32_t tcp_swnd; /* Senders window (relative to suna) */ 163 uint32_t tcp_mss; /* Max segment size */ 164 uint32_t tcp_iss; /* Initial send seq num */ 165 uint32_t tcp_rnxt; /* Seq we expect to recv next */ 166 uint32_t tcp_rwnd; 167 168 queue_t *tcp_rq; /* Our upstream neighbor (client) */ 169 queue_t *tcp_wq; /* Our downstream neighbor */ 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 int32_t tcp_xmit_hiwater; /* Send buffer high water mark. */ 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 /* 204 * Following socket options are set by sockfs outside the squeue 205 * and we want to separate these bit fields from the other bit fields 206 * set by TCP to avoid grabbing locks. sockfs ensures that only one 207 * thread in sockfs can set a socket option at a time on a conn_t. 208 * However TCP may read these options concurrently. The linger option 209 * needs atomicity since tcp_lingertime also needs to be in sync. 210 * However TCP uses it only during close, and by then no socket option 211 * can come down. So we don't need any locks, instead just separating 212 * the sockfs settable bit fields from the other bit fields is 213 * sufficient. 214 */ 215 uint32_t 216 tcp_debug : 1, /* SO_DEBUG "socket" option. */ 217 tcp_dontroute : 1, /* SO_DONTROUTE "socket" option. */ 218 tcp_broadcast : 1, /* SO_BROADCAST "socket" option. */ 219 tcp_useloopback : 1, /* SO_USELOOPBACK "socket" option. */ 220 221 tcp_oobinline : 1, /* SO_OOBINLINE "socket" option. */ 222 tcp_dgram_errind : 1, /* SO_DGRAM_ERRIND option */ 223 tcp_linger : 1, /* SO_LINGER turned on */ 224 tcp_reuseaddr : 1, /* SO_REUSEADDR "socket" option. */ 225 226 tcp_junk_to_bit_31 : 24; 227 228 /* Following manipulated by TCP under squeue protection */ 229 uint32_t 230 tcp_urp_last_valid : 1, /* Is tcp_urp_last valid? */ 231 tcp_hard_binding : 1, /* If we've started a full bind */ 232 tcp_hard_bound : 1, /* If we've done a full bind with IP */ 233 tcp_fin_acked : 1, /* Has our FIN been acked? */ 234 235 tcp_fin_rcvd : 1, /* Have we seen a FIN? */ 236 tcp_fin_sent : 1, /* Have we sent our FIN yet? */ 237 tcp_ordrel_done : 1, /* Have we sent the ord_rel upstream? */ 238 tcp_flow_stopped : 1, /* Have we flow controlled xmitter? */ 239 240 tcp_detached : 1, /* If we're detached from a stream */ 241 tcp_bind_pending : 1, /* Client is waiting for bind ack */ 242 tcp_unbind_pending : 1, /* Client sent T_UNBIND_REQ */ 243 tcp_deferred_clean_death : 1, 244 /* defer tcp endpoint cleanup etc. */ 245 246 tcp_conn_def_q0: 1, /* move from q0 to q deferred */ 247 tcp_ka_enabled: 1, /* Connection KeepAlive Timer needed */ 248 tcp_zero_win_probe: 1, /* Zero win probing is in progress */ 249 tcp_loopback: 1, /* src and dst are the same machine */ 250 251 tcp_localnet: 1, /* src and dst are on the same subnet */ 252 tcp_syn_defense: 1, /* For defense against SYN attack */ 253 #define tcp_dontdrop tcp_syn_defense 254 tcp_set_timer : 1, 255 tcp_active_open: 1, /* This is a active open */ 256 257 tcp_timeout : 1, /* qbufcall failed, qtimeout pending */ 258 tcp_rexmit : 1, /* TCP is retransmitting */ 259 tcp_snd_sack_ok : 1, /* Can use SACK for this connection */ 260 tcp_empty_flag : 1, /* Empty flag for future use */ 261 262 tcp_recvdstaddr : 1, /* return T_EXTCONN_IND with dst addr */ 263 tcp_hwcksum : 1, /* The NIC is capable of hwcksum */ 264 tcp_ip_forward_progress : 1, 265 tcp_anon_priv_bind : 1, 266 267 tcp_ecn_ok : 1, /* Can use ECN for this connection */ 268 tcp_ecn_echo_on : 1, /* Need to do ECN echo */ 269 tcp_ecn_cwr_sent : 1, /* ECN_CWR has been sent */ 270 tcp_cwr : 1; /* Cwnd has reduced recently */ 271 272 /* Following manipulated by TCP under squeue protection */ 273 uint32_t 274 tcp_mdt : 1, /* Lower layer is capable of MDT */ 275 tcp_snd_ts_ok : 1, 276 tcp_snd_ws_ok : 1, 277 tcp_exclbind : 1, /* ``exclusive'' binding */ 278 279 tcp_reserved_port : 1, 280 tcp_hdr_grown : 1, 281 tcp_in_free_list : 1, 282 tcp_snd_zcopy_on : 1, /* xmit zero-copy enabled */ 283 284 tcp_snd_zcopy_aware : 1, /* client is zero-copy aware */ 285 tcp_xmit_zc_clean : 1, /* the xmit list is free of zc-mblk */ 286 tcp_wait_for_eagers : 1, /* Wait for eagers to disappear */ 287 tcp_accept_error : 1, /* Error during TLI accept */ 288 289 tcp_send_discon_ind : 1, /* TLI accept err, send discon ind */ 290 tcp_cork : 1, /* tcp_cork option */ 291 tcp_tconnind_started : 1, /* conn_ind message is being sent */ 292 tcp_lso :1, /* Lower layer is capable of LSO */ 293 tcp_pad_to_bit_31 : 16; 294 295 uint32_t tcp_if_mtu; /* Outgoing interface MTU. */ 296 297 mblk_t *tcp_reass_head; /* Out of order reassembly list head */ 298 mblk_t *tcp_reass_tail; /* Out of order reassembly list tail */ 299 300 tcp_sack_info_t *tcp_sack_info; 301 302 #define tcp_pipe tcp_sack_info->tcp_pipe 303 #define tcp_fack tcp_sack_info->tcp_fack 304 #define tcp_sack_snxt tcp_sack_info->tcp_sack_snxt 305 #define tcp_max_sack_blk tcp_sack_info->tcp_max_sack_blk 306 #define tcp_num_sack_blk tcp_sack_info->tcp_num_sack_blk 307 #define tcp_sack_list tcp_sack_info->tcp_sack_list 308 #define tcp_num_notsack_blk tcp_sack_info->tcp_num_notsack_blk 309 #define tcp_cnt_notsack_list tcp_sack_info->tcp_cnt_notsack_list 310 #define tcp_notsack_list tcp_sack_info->tcp_notsack_list 311 312 mblk_t *tcp_rcv_list; /* Queued until push, urgent data, */ 313 mblk_t *tcp_rcv_last_head; /* optdata, or the count exceeds */ 314 mblk_t *tcp_rcv_last_tail; /* tcp_rcv_push_wait. */ 315 uint32_t tcp_rcv_cnt; /* tcp_rcv_list is b_next chain. */ 316 317 uint32_t tcp_cwnd_ssthresh; /* Congestion window */ 318 uint32_t tcp_cwnd_max; 319 uint32_t tcp_csuna; /* Clear (no rexmits in window) suna */ 320 321 clock_t tcp_rtt_sa; /* Round trip smoothed average */ 322 clock_t tcp_rtt_sd; /* Round trip smoothed deviation */ 323 clock_t tcp_rtt_update; /* Round trip update(s) */ 324 clock_t tcp_ms_we_have_waited; /* Total retrans time */ 325 326 uint32_t tcp_swl1; /* These help us avoid using stale */ 327 uint32_t tcp_swl2; /* packets to update state */ 328 329 uint32_t tcp_rack; /* Seq # we have acked */ 330 uint32_t tcp_rack_cnt; /* # of segs we have deferred ack */ 331 uint32_t tcp_rack_cur_max; /* # of segs we may defer ack for now */ 332 uint32_t tcp_rack_abs_max; /* # of segs we may defer ack ever */ 333 timeout_id_t tcp_ack_tid; /* Delayed ACK timer ID */ 334 timeout_id_t tcp_push_tid; /* Push timer ID */ 335 336 uint32_t tcp_max_swnd; /* Maximum swnd we have seen */ 337 338 struct tcp_s *tcp_listener; /* Our listener */ 339 340 int32_t tcp_xmit_lowater; /* Send buffer low water mark. */ 341 342 uint32_t tcp_irs; /* Initial recv seq num */ 343 uint32_t tcp_fss; /* Final/fin send seq num */ 344 uint32_t tcp_urg; /* Urgent data seq num */ 345 346 clock_t tcp_first_timer_threshold; /* When to prod IP */ 347 clock_t tcp_second_timer_threshold; /* When to give up completely */ 348 clock_t tcp_first_ctimer_threshold; /* 1st threshold while connecting */ 349 clock_t tcp_second_ctimer_threshold; /* 2nd ... while connecting */ 350 351 int tcp_lingertime; /* Close linger time (in seconds) */ 352 353 uint32_t tcp_urp_last; /* Last urp for which signal sent */ 354 mblk_t *tcp_urp_mp; /* T_EXDATA_IND for urgent byte */ 355 mblk_t *tcp_urp_mark_mp; /* zero-length marked/unmarked msg */ 356 357 int tcp_conn_req_cnt_q0; /* # of conn reqs in SYN_RCVD */ 358 int tcp_conn_req_cnt_q; /* # of conn reqs in ESTABLISHED */ 359 int tcp_conn_req_max; /* # of ESTABLISHED conn reqs allowed */ 360 t_scalar_t tcp_conn_req_seqnum; /* Incrementing pending conn req ID */ 361 #define tcp_ip_addr_cache tcp_reass_tail 362 /* Cache ip addresses that */ 363 /* complete the 3-way handshake */ 364 kmutex_t tcp_eager_lock; 365 struct tcp_s *tcp_eager_next_q; /* next eager in ESTABLISHED state */ 366 struct tcp_s *tcp_eager_last_q; /* last eager in ESTABLISHED state */ 367 struct tcp_s *tcp_eager_next_q0; /* next eager in SYN_RCVD state */ 368 struct tcp_s *tcp_eager_prev_q0; /* prev eager in SYN_RCVD state */ 369 /* all eagers form a circular list */ 370 union { 371 mblk_t *tcp_eager_conn_ind; /* T_CONN_IND waiting for 3rd ack. */ 372 mblk_t *tcp_opts_conn_req; /* T_CONN_REQ w/ options processed */ 373 } tcp_conn; 374 uint32_t tcp_syn_rcvd_timeout; /* How many SYN_RCVD timeout in q0 */ 375 376 /* TCP Keepalive Timer members */ 377 int32_t tcp_ka_last_intrvl; /* Last probe interval */ 378 timeout_id_t tcp_ka_tid; /* Keepalive timer ID */ 379 uint32_t tcp_ka_interval; /* Keepalive interval */ 380 uint32_t tcp_ka_abort_thres; /* Keepalive abort threshold */ 381 382 int32_t tcp_client_errno; /* How the client screwed up */ 383 384 char *tcp_iphc; /* Buffer holding tcp/ip hdr template */ 385 int tcp_iphc_len; /* actual allocated buffer size */ 386 int32_t tcp_hdr_len; /* Byte len of combined TCP/IP hdr */ 387 ipha_t *tcp_ipha; /* IPv4 header in the buffer */ 388 ip6_t *tcp_ip6h; /* IPv6 header in the buffer */ 389 int tcp_ip_hdr_len; /* Byte len of our current IPvx hdr */ 390 tcph_t *tcp_tcph; /* tcp header within combined hdr */ 391 int32_t tcp_tcp_hdr_len; /* tcp header len within combined */ 392 393 uint32_t tcp_sum; /* checksum to compensate for source */ 394 /* routed packets. Host byte order */ 395 uint16_t tcp_last_sent_len; /* Record length for nagle */ 396 uint16_t tcp_dupack_cnt; /* # of consequtive duplicate acks */ 397 398 kmutex_t *tcp_acceptor_lockp; /* Ptr to tf_lock */ 399 400 timeout_id_t tcp_ordrelid; /* qbufcall/qtimeout id */ 401 t_uscalar_t tcp_acceptor_id; /* ACCEPTOR_id */ 402 403 int tcp_ipsec_overhead; 404 /* 405 * Address family that app wishes returned addrsses to be in. 406 * Currently taken from address family used in T_BIND_REQ, but 407 * should really come from family used in original socket() call. 408 * Value can be AF_INET or AF_INET6. 409 */ 410 uint_t tcp_family; 411 /* 412 * used for a quick test to determine if any ancillary bits are 413 * set 414 */ 415 uint_t tcp_ipv6_recvancillary; /* Flags */ 416 #define TCP_IPV6_RECVPKTINFO 0x01 /* IPV6_RECVPKTINFO option */ 417 #define TCP_IPV6_RECVHOPLIMIT 0x02 /* IPV6_RECVHOPLIMIT option */ 418 #define TCP_IPV6_RECVHOPOPTS 0x04 /* IPV6_RECVHOPOPTS option */ 419 #define TCP_IPV6_RECVDSTOPTS 0x08 /* IPV6_RECVDSTOPTS option */ 420 #define TCP_IPV6_RECVRTHDR 0x10 /* IPV6_RECVRTHDR option */ 421 #define TCP_IPV6_RECVRTDSTOPTS 0x20 /* IPV6_RECVRTHDRDSTOPTS option */ 422 #define TCP_IPV6_RECVTCLASS 0x40 /* IPV6_RECVTCLASS option */ 423 #define TCP_OLD_IPV6_RECVDSTOPTS 0x80 /* old IPV6_RECVDSTOPTS option */ 424 425 uint_t tcp_recvifindex; /* Last received IPV6_RCVPKTINFO */ 426 uint_t tcp_recvhops; /* Last received IPV6_RECVHOPLIMIT */ 427 uint_t tcp_recvtclass; /* Last received IPV6_RECVTCLASS */ 428 ip6_hbh_t *tcp_hopopts; /* Last received IPV6_RECVHOPOPTS */ 429 ip6_dest_t *tcp_dstopts; /* Last received IPV6_RECVDSTOPTS */ 430 ip6_dest_t *tcp_rtdstopts; /* Last recvd IPV6_RECVRTHDRDSTOPTS */ 431 ip6_rthdr_t *tcp_rthdr; /* Last received IPV6_RECVRTHDR */ 432 uint_t tcp_hopoptslen; 433 uint_t tcp_dstoptslen; 434 uint_t tcp_rtdstoptslen; 435 uint_t tcp_rthdrlen; 436 437 mblk_t *tcp_timercache; 438 cred_t *tcp_cred; /* Credentials when this was opened */ 439 pid_t tcp_cpid; /* Process id when this was opened */ 440 uint64_t tcp_open_time; /* time when this was opened */ 441 442 443 union { 444 struct { 445 uchar_t v4_ttl; 446 /* Dup of tcp_ipha.iph_type_of_service */ 447 uchar_t v4_tos; /* Dup of tcp_ipha.iph_ttl */ 448 } v4_hdr_info; 449 struct { 450 uint_t v6_vcf; /* Dup of tcp_ip6h.ip6h_vcf */ 451 uchar_t v6_hops; /* Dup of tcp_ip6h.ip6h_hops */ 452 } v6_hdr_info; 453 } tcp_hdr_info; 454 #define tcp_ttl tcp_hdr_info.v4_hdr_info.v4_ttl 455 #define tcp_tos tcp_hdr_info.v4_hdr_info.v4_tos 456 #define tcp_ip6_vcf tcp_hdr_info.v6_hdr_info.v6_vcf 457 #define tcp_ip6_hops tcp_hdr_info.v6_hdr_info.v6_hops 458 459 ushort_t tcp_ipversion; 460 uint_t tcp_bound_if; /* IPV6_BOUND_IF */ 461 462 #define tcp_lport tcp_connp->conn_lport 463 #define tcp_fport tcp_connp->conn_fport 464 #define tcp_ports tcp_connp->conn_ports 465 466 #define tcp_remote tcp_connp->conn_rem 467 #define tcp_ip_src tcp_connp->conn_src 468 469 #define tcp_remote_v6 tcp_connp->conn_remv6 470 #define tcp_ip_src_v6 tcp_connp->conn_srcv6 471 #define tcp_bound_source_v6 tcp_connp->conn_bound_source_v6 472 #define tcp_bound_source tcp_connp->conn_bound_source 473 474 kmutex_t tcp_closelock; 475 kcondvar_t tcp_closecv; 476 uint8_t tcp_closed; 477 uint8_t tcp_closeflags; 478 uint8_t tcp_cleandeathtag; 479 mblk_t tcp_closemp; 480 timeout_id_t tcp_linger_tid; /* Linger timer ID */ 481 void *tcp_tracebuf; 482 483 struct tcp_s *tcp_acceptor_hash; /* Acceptor hash chain */ 484 struct tcp_s **tcp_ptpahn; /* Pointer to previous accept hash next. */ 485 struct tcp_s *tcp_bind_hash; /* Bind hash chain */ 486 struct tcp_s **tcp_ptpbhn; 487 488 boolean_t tcp_ire_ill_check_done; 489 uint_t tcp_maxpsz; 490 491 /* 492 * used for Multidata Transmit 493 */ 494 uint_t tcp_mdt_hdr_head; /* leading header fragment extra space */ 495 uint_t tcp_mdt_hdr_tail; /* trailing header fragment extra space */ 496 int tcp_mdt_max_pld; /* maximum payload buffers per Multidata */ 497 498 uint32_t tcp_lso_max; /* maximum LSO payload */ 499 500 uint32_t tcp_ofo_fin_seq; /* Recv out of order FIN seq num */ 501 uint32_t tcp_cwr_snd_max; 502 uint_t tcp_drop_opt_ack_cnt; /* # tcp generated optmgmt */ 503 ip6_pkt_t tcp_sticky_ipp; /* Sticky options */ 504 #define tcp_ipp_fields tcp_sticky_ipp.ipp_fields /* valid fields */ 505 #define tcp_ipp_ifindex tcp_sticky_ipp.ipp_ifindex /* pktinfo ifindex */ 506 #define tcp_ipp_addr tcp_sticky_ipp.ipp_addr /* pktinfo src/dst addr */ 507 #define tcp_ipp_hoplimit tcp_sticky_ipp.ipp_hoplimit 508 #define tcp_ipp_hopoptslen tcp_sticky_ipp.ipp_hopoptslen 509 #define tcp_ipp_rtdstoptslen tcp_sticky_ipp.ipp_rtdstoptslen 510 #define tcp_ipp_rthdrlen tcp_sticky_ipp.ipp_rthdrlen 511 #define tcp_ipp_dstoptslen tcp_sticky_ipp.ipp_dstoptslen 512 #define tcp_ipp_hopopts tcp_sticky_ipp.ipp_hopopts 513 #define tcp_ipp_rtdstopts tcp_sticky_ipp.ipp_rtdstopts 514 #define tcp_ipp_rthdr tcp_sticky_ipp.ipp_rthdr 515 #define tcp_ipp_dstopts tcp_sticky_ipp.ipp_dstopts 516 #define tcp_ipp_nexthop tcp_sticky_ipp.ipp_nexthop 517 #define tcp_ipp_use_min_mtu tcp_sticky_ipp.ipp_use_min_mtu 518 struct tcp_s *tcp_saved_listener; /* saved value of listener */ 519 520 uint32_t tcp_in_ack_unsent; /* ACK for unsent data cnt. */ 521 522 /* 523 * The following fusion-related fields are protected by squeue. 524 */ 525 struct tcp_s *tcp_loopback_peer; /* peer tcp for loopback */ 526 mblk_t *tcp_fused_sigurg_mp; /* M_PCSIG mblk for SIGURG */ 527 size_t tcp_fuse_rcv_hiwater; /* fusion receive queue size */ 528 uint_t tcp_fuse_rcv_unread_hiwater; /* max # of outstanding pkts */ 529 /* 530 * The following fusion-related fields and bit fields are to be 531 * manipulated with squeue protection or with tcp_fuse_lock held. 532 */ 533 kmutex_t tcp_fuse_lock; 534 kcondvar_t tcp_fuse_plugcv; 535 uint_t tcp_fuse_rcv_unread_cnt; /* # of outstanding pkts */ 536 uint32_t 537 tcp_fused : 1, /* loopback tcp in fusion mode */ 538 tcp_unfusable : 1, /* fusion not allowed on endpoint */ 539 tcp_fused_sigurg : 1, /* send SIGURG upon draining */ 540 tcp_direct_sockfs : 1, /* direct calls to sockfs */ 541 542 tcp_fuse_syncstr_stopped : 1, /* synchronous streams stopped */ 543 tcp_fuse_syncstr_plugged : 1, /* synchronous streams plugged */ 544 tcp_fuse_to_bit_31 : 26; 545 546 /* 547 * This variable is accessed without any lock protection 548 * and therefore must not be declared as a bit field along 549 * with the rest which require such condition. 550 */ 551 boolean_t tcp_issocket; /* this is a socket tcp */ 552 553 uint32_t tcp_squeue_bytes; 554 /* 555 * Kernel SSL session information 556 */ 557 boolean_t tcp_kssl_pending; /* waiting for 1st SSL rec. */ 558 boolean_t tcp_kssl_inhandshake; /* during SSL handshake */ 559 kssl_ent_t tcp_kssl_ent; /* SSL table entry */ 560 kssl_ctx_t tcp_kssl_ctx; /* SSL session */ 561 uint_t tcp_label_len; /* length of cached label */ 562 563 /* 564 * tcp_closemp_used is protected by listener's tcp_eager_lock 565 * when used for eagers. When used for a tcp in TIME_WAIT state 566 * or in tcp_close(), it is not protected by any lock as we 567 * do not expect any other thread to use it concurrently. 568 * Since we do allow re-use of tcp_closemp at certain places, 569 * tcp_closemp_used is declared as uint32_t instead of boolean_t 570 * to record any attempt to re-use tcp_closemp while it is still 571 * in use. This would facilitate debugging in non-debug kernels. 572 */ 573 uint32_t tcp_closemp_used; 574 575 /* 576 * previous and next eagers in the list of droppable eagers. See 577 * the comments before MAKE_DROPPABLE(). These pointers are 578 * protected by listener's tcp_eager_lock. 579 */ 580 struct tcp_s *tcp_eager_prev_drop_q0; 581 struct tcp_s *tcp_eager_next_drop_q0; 582 #ifdef DEBUG 583 pc_t tcmp_stk[15]; 584 #endif 585 } tcp_t; 586 587 #ifdef DEBUG 588 #define TCP_DEBUG_GETPCSTACK(buffer, depth) ((void) getpcstack(buffer, \ 589 depth)) 590 #else 591 #define TCP_DEBUG_GETPCSTACK(buffer, depth) 592 #endif 593 594 extern void tcp_free(tcp_t *tcp); 595 extern void tcp_ddi_init(void); 596 extern void tcp_ddi_destroy(void); 597 extern void tcp_xmit_listeners_reset(mblk_t *mp, uint_t ip_hdr_len, 598 zoneid_t zoneid); 599 extern void tcp_conn_request(void *arg, mblk_t *mp, void *arg2); 600 extern void tcp_conn_request_unbound(void *arg, mblk_t *mp, void *arg2); 601 extern void tcp_input(void *arg, mblk_t *mp, void *arg2); 602 extern void tcp_rput_data(void *arg, mblk_t *mp, void *arg2); 603 extern void *tcp_get_conn(void *arg); 604 extern void tcp_time_wait_collector(void *arg); 605 extern int tcp_snmp_get(queue_t *, mblk_t *); 606 extern int tcp_snmp_set(queue_t *, int, int, uchar_t *, int len); 607 extern mblk_t *tcp_xmit_mp(tcp_t *tcp, mblk_t *mp, int32_t max_to_send, 608 int32_t *offset, mblk_t **end_mp, uint32_t seq, 609 boolean_t sendall, uint32_t *seg_len, boolean_t rexmit); 610 /* 611 * The TCP Fanout structure. 612 * The hash tables and their linkage (tcp_*_hash_next, tcp_ptp*hn) are 613 * protected by the per-bucket tf_lock. Each tcp_t 614 * inserted in the list points back at this lock using tcp_*_lockp. 615 * 616 * The listener and acceptor hash queues are lists of tcp_t. 617 */ 618 619 /* listener hash and acceptor hash queue head */ 620 typedef struct tf_s { 621 tcp_t *tf_tcp; 622 kmutex_t tf_lock; 623 } tf_t; 624 625 extern mib2_tcp_t tcp_mib; 626 627 #endif /* (defined(_KERNEL) || defined(_KMEMUSER)) */ 628 629 /* Contract private interface between TCP and Clustering. */ 630 631 #define CL_TCPI_V1 1 /* cl_tcpi_version number */ 632 633 typedef struct cl_tcp_info_s { 634 ushort_t cl_tcpi_version; /* cl_tcp_info_t's version no */ 635 ushort_t cl_tcpi_ipversion; /* IP version */ 636 int32_t cl_tcpi_state; /* TCP state */ 637 in_port_t cl_tcpi_lport; /* Local port */ 638 in_port_t cl_tcpi_fport; /* Remote port */ 639 in6_addr_t cl_tcpi_laddr_v6; /* Local IP address */ 640 in6_addr_t cl_tcpi_faddr_v6; /* Remote IP address */ 641 #ifdef _KERNEL 642 /* Note: V4_PART_OF_V6 is meant to be used only for _KERNEL defined stuff */ 643 #define cl_tcpi_laddr V4_PART_OF_V6(cl_tcpi_laddr_v6) 644 #define cl_tcpi_faddr V4_PART_OF_V6(cl_tcpi_faddr_v6) 645 646 #endif /* _KERNEL */ 647 } cl_tcp_info_t; 648 649 /* 650 * Hook functions to enable cluster networking 651 * On non-clustered systems these vectors must always be NULL. 652 */ 653 654 extern void (*cl_inet_listen)(uint8_t, sa_family_t, uint8_t *, in_port_t); 655 extern void (*cl_inet_unlisten)(uint8_t, sa_family_t, uint8_t *, 656 in_port_t); 657 658 /* 659 * Contracted Consolidation Private ioctl for aborting TCP connections. 660 * In order to keep the offsets and size of the structure the same between 661 * a 32-bit application and a 64-bit amd64 kernel, we use a #pragma 662 * pack(4). 663 */ 664 #define TCP_IOC_ABORT_CONN (('T' << 8) + 91) 665 666 #if _LONG_LONG_ALIGNMENT == 8 && _LONG_LONG_ALIGNMENT_32 == 4 667 #pragma pack(4) 668 #endif 669 670 typedef struct tcp_ioc_abort_conn_s { 671 struct sockaddr_storage ac_local; /* local addr and port */ 672 struct sockaddr_storage ac_remote; /* remote addr and port */ 673 int32_t ac_start; /* start state */ 674 int32_t ac_end; /* end state */ 675 int32_t ac_zoneid; /* zoneid */ 676 } tcp_ioc_abort_conn_t; 677 678 #if _LONG_LONG_ALIGNMENT == 8 && _LONG_LONG_ALIGNMENT_32 == 4 679 #pragma pack() 680 #endif 681 682 #if (defined(_KERNEL) || defined(_KMEMUSER)) 683 extern void tcp_rput_other(tcp_t *tcp, mblk_t *mp); 684 #endif 685 686 #ifdef __cplusplus 687 } 688 #endif 689 690 #endif /* _INET_TCP_H */ 691