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) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23 */ 24 25 #ifndef _INET_TCP_IMPL_H 26 #define _INET_TCP_IMPL_H 27 28 /* 29 * TCP implementation private declarations. These interfaces are 30 * used to build the IP module and are not meant to be accessed 31 * by any modules except IP itself. They are undocumented and are 32 * subject to change without notice. 33 */ 34 35 #ifdef __cplusplus 36 extern "C" { 37 #endif 38 39 #ifdef _KERNEL 40 41 #include <sys/cpuvar.h> 42 #include <sys/clock_impl.h> /* For LBOLT_FASTPATH{,64} */ 43 #include <inet/optcom.h> 44 #include <inet/tcp.h> 45 #include <inet/tunables.h> 46 47 #define TCP_MOD_ID 5105 48 49 extern struct qinit tcp_sock_winit; 50 extern struct qinit tcp_winit; 51 52 extern sock_downcalls_t sock_tcp_downcalls; 53 54 /* 55 * Bind hash list size and has function. It has to be a power of 2 for 56 * hashing. 57 */ 58 #define TCP_BIND_FANOUT_SIZE 512 59 #define TCP_BIND_HASH(lport) (ntohs(lport) & (TCP_BIND_FANOUT_SIZE - 1)) 60 61 /* 62 * This implementation follows the 4.3BSD interpretation of the urgent 63 * pointer and not RFC 1122. Switching to RFC 1122 behavior would cause 64 * incompatible changes in protocols like telnet and rlogin. 65 */ 66 #define TCP_OLD_URP_INTERPRETATION 1 67 68 /* TCP option length */ 69 #define TCPOPT_NOP_LEN 1 70 #define TCPOPT_MAXSEG_LEN 4 71 #define TCPOPT_WS_LEN 3 72 #define TCPOPT_REAL_WS_LEN (TCPOPT_WS_LEN+1) 73 #define TCPOPT_TSTAMP_LEN 10 74 #define TCPOPT_REAL_TS_LEN (TCPOPT_TSTAMP_LEN+2) 75 #define TCPOPT_SACK_OK_LEN 2 76 #define TCPOPT_REAL_SACK_OK_LEN (TCPOPT_SACK_OK_LEN+2) 77 #define TCPOPT_REAL_SACK_LEN 4 78 #define TCPOPT_MAX_SACK_LEN 36 79 #define TCPOPT_HEADER_LEN 2 80 81 /* Round up the value to the nearest mss. */ 82 #define MSS_ROUNDUP(value, mss) ((((value) - 1) / (mss) + 1) * (mss)) 83 84 /* 85 * Was this tcp created via socket() interface? 86 */ 87 #define TCP_IS_SOCKET(tcp) ((tcp)->tcp_issocket) 88 89 /* 90 * Is this tcp not attached to any upper client? 91 */ 92 #define TCP_IS_DETACHED(tcp) ((tcp)->tcp_detached) 93 94 /* TCP timers related data strucutres. Refer to tcp_timers.c. */ 95 typedef struct tcp_timer_s { 96 conn_t *connp; 97 void (*tcpt_proc)(void *); 98 callout_id_t tcpt_tid; 99 } tcp_timer_t; 100 101 extern kmem_cache_t *tcp_timercache; 102 103 /* 104 * Macro for starting various timers. Retransmission timer has its own macro, 105 * TCP_TIMER_RESTART(). tim is in millisec. 106 */ 107 #define TCP_TIMER(tcp, f, tim) \ 108 tcp_timeout(tcp->tcp_connp, f, tim) 109 #define TCP_TIMER_CANCEL(tcp, id) \ 110 tcp_timeout_cancel(tcp->tcp_connp, id) 111 112 /* 113 * To restart the TCP retransmission timer. intvl is in millisec. 114 */ 115 #define TCP_TIMER_RESTART(tcp, intvl) { \ 116 if ((tcp)->tcp_timer_tid != 0) \ 117 (void) TCP_TIMER_CANCEL((tcp), (tcp)->tcp_timer_tid); \ 118 (tcp)->tcp_timer_tid = TCP_TIMER((tcp), tcp_timer, (intvl)); \ 119 } 120 121 /* 122 * For scalability, we must not run a timer for every TCP connection 123 * in TIME_WAIT state. To see why, consider (for time wait interval of 124 * 1 minutes): 125 * 10,000 connections/sec * 60 seconds/time wait = 600,000 active conn's 126 * 127 * This list is ordered by time, so you need only delete from the head 128 * until you get to entries which aren't old enough to delete yet. 129 * The list consists of only the detached TIME_WAIT connections. 130 * 131 * When a tcp_t enters TIME_WAIT state, a timer is started (timeout is 132 * tcps_time_wait_interval). When the tcp_t is detached (upper layer closes 133 * the end point), it is moved to the time wait list and another timer is 134 * started (expiry time is set at tcp_time_wait_expire, which is 135 * also calculated using tcps_time_wait_interval). This means that the 136 * TIME_WAIT state can be extended (up to doubled) if the tcp_t doesn't 137 * become detached for a long time. 138 * 139 * The list manipulations (including tcp_time_wait_next/prev) 140 * are protected by the tcp_time_wait_lock. The content of the 141 * detached TIME_WAIT connections is protected by the normal perimeters. 142 * 143 * This list is per squeue and squeues are shared across the tcp_stack_t's. 144 * Things on tcp_time_wait_head remain associated with the tcp_stack_t 145 * and conn_netstack. 146 * The tcp_t's that are added to tcp_free_list are disassociated and 147 * have NULL tcp_tcps and conn_netstack pointers. 148 */ 149 typedef struct tcp_squeue_priv_s { 150 kmutex_t tcp_time_wait_lock; 151 callout_id_t tcp_time_wait_tid; 152 tcp_t *tcp_time_wait_head; 153 tcp_t *tcp_time_wait_tail; 154 tcp_t *tcp_free_list; 155 uint_t tcp_free_list_cnt; 156 #ifdef DEBUG 157 /* 158 * For debugging purpose, true when tcp_time_wait_collector() is 159 * running. 160 */ 161 boolean_t tcp_time_wait_running; 162 #endif 163 } tcp_squeue_priv_t; 164 165 /* 166 * Parameters for TCP Initial Send Sequence number (ISS) generation. When 167 * tcp_strong_iss is set to 1, which is the default, the ISS is calculated 168 * by adding three components: a time component which grows by 1 every 4096 169 * nanoseconds (versus every 4 microseconds suggested by RFC 793, page 27); 170 * a per-connection component which grows by 125000 for every new connection; 171 * and an "extra" component that grows by a random amount centered 172 * approximately on 64000. This causes the ISS generator to cycle every 173 * 4.89 hours if no TCP connections are made, and faster if connections are 174 * made. 175 * 176 * When tcp_strong_iss is set to 0, ISS is calculated by adding two 177 * components: a time component which grows by 250000 every second; and 178 * a per-connection component which grows by 125000 for every new connections. 179 * 180 * A third method, when tcp_strong_iss is set to 2, for generating ISS is 181 * prescribed by Steve Bellovin. This involves adding time, the 125000 per 182 * connection, and a one-way hash (MD5) of the connection ID <sport, dport, 183 * src, dst>, a "truly" random (per RFC 1750) number, and a console-entered 184 * password. 185 */ 186 #define ISS_INCR 250000 187 #define ISS_NSEC_SHT 12 188 189 /* Macros for timestamp comparisons */ 190 #define TSTMP_GEQ(a, b) ((int32_t)((a)-(b)) >= 0) 191 #define TSTMP_LT(a, b) ((int32_t)((a)-(b)) < 0) 192 193 /* 194 * Initialize cwnd according to RFC 3390. def_max_init_cwnd is 195 * either tcp_slow_start_initial or tcp_slow_start_after idle 196 * depending on the caller. If the upper layer has not used the 197 * TCP_INIT_CWND option to change the initial cwnd, tcp_init_cwnd 198 * should be 0 and we use the formula in RFC 3390 to set tcp_cwnd. 199 * If the upper layer has changed set the tcp_init_cwnd, just use 200 * it to calculate the tcp_cwnd. 201 */ 202 #define TCP_SET_INIT_CWND(tcp, mss, def_max_init_cwnd) \ 203 { \ 204 if ((tcp)->tcp_init_cwnd == 0) { \ 205 (tcp)->tcp_cwnd = MIN(def_max_init_cwnd * (mss), \ 206 MIN(4 * (mss), MAX(2 * (mss), 4380 / (mss) * (mss)))); \ 207 } else { \ 208 (tcp)->tcp_cwnd = (tcp)->tcp_init_cwnd * (mss); \ 209 } \ 210 tcp->tcp_cwnd_cnt = 0; \ 211 } 212 213 /* 214 * Set ECN capable transport (ECT) code point in IP header. 215 * 216 * Note that there are 2 ECT code points '01' and '10', which are called 217 * ECT(1) and ECT(0) respectively. Here we follow the original ECT code 218 * point ECT(0) for TCP as described in RFC 2481. 219 */ 220 #define TCP_SET_ECT(tcp, iph) \ 221 if ((tcp)->tcp_connp->conn_ipversion == IPV4_VERSION) { \ 222 /* We need to clear the code point first. */ \ 223 ((ipha_t *)(iph))->ipha_type_of_service &= 0xFC; \ 224 ((ipha_t *)(iph))->ipha_type_of_service |= IPH_ECN_ECT0; \ 225 } else { \ 226 ((ip6_t *)(iph))->ip6_vcf &= htonl(0xFFCFFFFF); \ 227 ((ip6_t *)(iph))->ip6_vcf |= htonl(IPH_ECN_ECT0 << 20); \ 228 } 229 230 /* 231 * Set tcp_rto with boundary checking. 232 */ 233 #define TCP_SET_RTO(tcp, rto) \ 234 if ((rto) < (tcp)->tcp_rto_min) \ 235 (tcp)->tcp_rto = (tcp)->tcp_rto_min; \ 236 else if ((rto) > (tcp)->tcp_rto_max) \ 237 (tcp)->tcp_rto = (tcp)->tcp_rto_max; \ 238 else \ 239 (tcp)->tcp_rto = (rto); 240 241 /* 242 * TCP options struct returned from tcp_parse_options. 243 */ 244 typedef struct tcp_opt_s { 245 uint32_t tcp_opt_mss; 246 uint32_t tcp_opt_wscale; 247 uint32_t tcp_opt_ts_val; 248 uint32_t tcp_opt_ts_ecr; 249 tcp_t *tcp; 250 } tcp_opt_t; 251 252 /* 253 * Write-side flow-control is implemented via the per instance STREAMS 254 * write-side Q by explicitly setting QFULL to stop the flow of mblk_t(s) 255 * and clearing QFULL and calling qbackenable() to restart the flow based 256 * on the number of TCP unsent bytes (i.e. those not on the wire waiting 257 * for a remote ACK). 258 * 259 * This is different than a standard STREAMS kmod which when using the 260 * STREAMS Q the framework would automatictly flow-control based on the 261 * defined hiwat/lowat values as mblk_t's are enqueued/dequeued. 262 * 263 * As of FireEngine TCP write-side flow-control needs to take into account 264 * both the unsent tcp_xmit list bytes but also any squeue_t enqueued bytes 265 * (i.e. from tcp_wput() -> tcp_output()). 266 * 267 * This is accomplished by adding a new tcp_t fields, tcp_squeue_bytes, to 268 * count the number of bytes enqueued by tcp_wput() and the number of bytes 269 * dequeued and processed by tcp_output(). 270 * 271 * So, the total number of bytes unsent is (squeue_bytes + unsent) with all 272 * flow-control uses of unsent replaced with the macro TCP_UNSENT_BYTES. 273 */ 274 extern void tcp_clrqfull(tcp_t *); 275 extern void tcp_setqfull(tcp_t *); 276 277 #define TCP_UNSENT_BYTES(tcp) \ 278 ((tcp)->tcp_squeue_bytes + (tcp)->tcp_unsent) 279 280 /* 281 * Linked list struct to store listener connection limit configuration per 282 * IP stack. The list is stored at tcps_listener_conf in tcp_stack_t. 283 * 284 * tl_port: the listener port of this limit configuration 285 * tl_ratio: the maximum amount of memory consumed by all concurrent TCP 286 * connections created by a listener does not exceed 1/tl_ratio 287 * of the total system memory. Note that this is only an 288 * approximation. 289 * tl_link: linked list struct 290 */ 291 typedef struct tcp_listener_s { 292 in_port_t tl_port; 293 uint32_t tl_ratio; 294 list_node_t tl_link; 295 } tcp_listener_t; 296 297 /* 298 * If there is a limit set on the number of connections allowed per each 299 * listener, the following struct is used to store that counter. It keeps 300 * the number of TCP connection created by a listener. Note that this needs 301 * to be separated from the listener since the listener can go away before 302 * all the connections are gone. 303 * 304 * When the struct is allocated, tlc_cnt is set to 1. When a new connection 305 * is created by the listener, tlc_cnt is incremented by 1. When a connection 306 * created by the listener goes away, tlc_count is decremented by 1. When the 307 * listener itself goes away, tlc_cnt is decremented by one. The last 308 * connection (or the listener) which decrements tlc_cnt to zero frees the 309 * struct. 310 * 311 * tlc_max is the maximum number of concurrent TCP connections created from a 312 * listner. It is calculated when the tcp_listen_cnt_t is allocated. 313 * 314 * tlc_report_time stores the time when cmn_err() is called to report that the 315 * max has been exceeeded. Report is done at most once every 316 * TCP_TLC_REPORT_INTERVAL mins for a listener. 317 * 318 * tlc_drop stores the number of connection attempt dropped because the 319 * limit has reached. 320 */ 321 typedef struct tcp_listen_cnt_s { 322 uint32_t tlc_max; 323 uint32_t tlc_cnt; 324 int64_t tlc_report_time; 325 uint32_t tlc_drop; 326 } tcp_listen_cnt_t; 327 328 #define TCP_TLC_REPORT_INTERVAL (30 * MINUTES) 329 330 #define TCP_DECR_LISTEN_CNT(tcp) \ 331 { \ 332 ASSERT((tcp)->tcp_listen_cnt->tlc_cnt > 0); \ 333 if (atomic_add_32_nv(&(tcp)->tcp_listen_cnt->tlc_cnt, -1) == 0) \ 334 kmem_free((tcp)->tcp_listen_cnt, sizeof (tcp_listen_cnt_t)); \ 335 (tcp)->tcp_listen_cnt = NULL; \ 336 } 337 338 /* Increment and decrement the number of connections in tcp_stack_t. */ 339 #define TCPS_CONN_INC(tcps) \ 340 atomic_inc_64( \ 341 (uint64_t *)&(tcps)->tcps_sc[CPU->cpu_seqid]->tcp_sc_conn_cnt) 342 343 #define TCPS_CONN_DEC(tcps) \ 344 atomic_dec_64( \ 345 (uint64_t *)&(tcps)->tcps_sc[CPU->cpu_seqid]->tcp_sc_conn_cnt) 346 347 /* 348 * When the system is under memory pressure, stack variable tcps_reclaim is 349 * true, we shorten the connection timeout abort interval to tcp_early_abort 350 * seconds. Defined in tcp.c. 351 */ 352 extern uint32_t tcp_early_abort; 353 354 /* 355 * To reach to an eager in Q0 which can be dropped due to an incoming 356 * new SYN request when Q0 is full, a new doubly linked list is 357 * introduced. This list allows to select an eager from Q0 in O(1) time. 358 * This is needed to avoid spending too much time walking through the 359 * long list of eagers in Q0 when tcp_drop_q0() is called. Each member of 360 * this new list has to be a member of Q0. 361 * This list is headed by listener's tcp_t. When the list is empty, 362 * both the pointers - tcp_eager_next_drop_q0 and tcp_eager_prev_drop_q0, 363 * of listener's tcp_t point to listener's tcp_t itself. 364 * 365 * Given an eager in Q0 and a listener, MAKE_DROPPABLE() puts the eager 366 * in the list. MAKE_UNDROPPABLE() takes the eager out of the list. 367 * These macros do not affect the eager's membership to Q0. 368 */ 369 #define MAKE_DROPPABLE(listener, eager) \ 370 if ((eager)->tcp_eager_next_drop_q0 == NULL) { \ 371 (listener)->tcp_eager_next_drop_q0->tcp_eager_prev_drop_q0\ 372 = (eager); \ 373 (eager)->tcp_eager_prev_drop_q0 = (listener); \ 374 (eager)->tcp_eager_next_drop_q0 = \ 375 (listener)->tcp_eager_next_drop_q0; \ 376 (listener)->tcp_eager_next_drop_q0 = (eager); \ 377 } 378 379 #define MAKE_UNDROPPABLE(eager) \ 380 if ((eager)->tcp_eager_next_drop_q0 != NULL) { \ 381 (eager)->tcp_eager_next_drop_q0->tcp_eager_prev_drop_q0 \ 382 = (eager)->tcp_eager_prev_drop_q0; \ 383 (eager)->tcp_eager_prev_drop_q0->tcp_eager_next_drop_q0 \ 384 = (eager)->tcp_eager_next_drop_q0; \ 385 (eager)->tcp_eager_prev_drop_q0 = NULL; \ 386 (eager)->tcp_eager_next_drop_q0 = NULL; \ 387 } 388 389 /* 390 * The format argument to pass to tcp_display(). 391 * DISP_PORT_ONLY means that the returned string has only port info. 392 * DISP_ADDR_AND_PORT means that the returned string also contains the 393 * remote and local IP address. 394 */ 395 #define DISP_PORT_ONLY 1 396 #define DISP_ADDR_AND_PORT 2 397 398 #define IP_ADDR_CACHE_SIZE 2048 399 #define IP_ADDR_CACHE_HASH(faddr) \ 400 (ntohl(faddr) & (IP_ADDR_CACHE_SIZE -1)) 401 402 /* TCP cwnd burst factor. */ 403 #define TCP_CWND_INFINITE 65535 404 #define TCP_CWND_SS 3 405 #define TCP_CWND_NORMAL 5 406 407 /* 408 * TCP reassembly macros. We hide starting and ending sequence numbers in 409 * b_next and b_prev of messages on the reassembly queue. The messages are 410 * chained using b_cont. These macros are used in tcp_reass() so we don't 411 * have to see the ugly casts and assignments. 412 */ 413 #define TCP_REASS_SEQ(mp) ((uint32_t)(uintptr_t)((mp)->b_next)) 414 #define TCP_REASS_SET_SEQ(mp, u) ((mp)->b_next = \ 415 (mblk_t *)(uintptr_t)(u)) 416 #define TCP_REASS_END(mp) ((uint32_t)(uintptr_t)((mp)->b_prev)) 417 #define TCP_REASS_SET_END(mp, u) ((mp)->b_prev = \ 418 (mblk_t *)(uintptr_t)(u)) 419 420 #define tcps_time_wait_interval tcps_propinfo_tbl[0].prop_cur_uval 421 #define tcps_conn_req_max_q tcps_propinfo_tbl[1].prop_cur_uval 422 #define tcps_conn_req_max_q0 tcps_propinfo_tbl[2].prop_cur_uval 423 #define tcps_conn_req_min tcps_propinfo_tbl[3].prop_cur_uval 424 #define tcps_conn_grace_period tcps_propinfo_tbl[4].prop_cur_uval 425 #define tcps_cwnd_max_ tcps_propinfo_tbl[5].prop_cur_uval 426 #define tcps_dbg tcps_propinfo_tbl[6].prop_cur_uval 427 #define tcps_smallest_nonpriv_port tcps_propinfo_tbl[7].prop_cur_uval 428 #define tcps_ip_abort_cinterval tcps_propinfo_tbl[8].prop_cur_uval 429 #define tcps_ip_abort_linterval tcps_propinfo_tbl[9].prop_cur_uval 430 #define tcps_ip_abort_interval tcps_propinfo_tbl[10].prop_cur_uval 431 #define tcps_ip_notify_cinterval tcps_propinfo_tbl[11].prop_cur_uval 432 #define tcps_ip_notify_interval tcps_propinfo_tbl[12].prop_cur_uval 433 #define tcps_ipv4_ttl tcps_propinfo_tbl[13].prop_cur_uval 434 #define tcps_keepalive_interval_high tcps_propinfo_tbl[14].prop_max_uval 435 #define tcps_keepalive_interval tcps_propinfo_tbl[14].prop_cur_uval 436 #define tcps_keepalive_interval_low tcps_propinfo_tbl[14].prop_min_uval 437 #define tcps_maxpsz_multiplier tcps_propinfo_tbl[15].prop_cur_uval 438 #define tcps_mss_def_ipv4 tcps_propinfo_tbl[16].prop_cur_uval 439 #define tcps_mss_max_ipv4 tcps_propinfo_tbl[17].prop_cur_uval 440 #define tcps_mss_min tcps_propinfo_tbl[18].prop_cur_uval 441 #define tcps_naglim_def tcps_propinfo_tbl[19].prop_cur_uval 442 #define tcps_rexmit_interval_initial_high \ 443 tcps_propinfo_tbl[20].prop_max_uval 444 #define tcps_rexmit_interval_initial tcps_propinfo_tbl[20].prop_cur_uval 445 #define tcps_rexmit_interval_initial_low \ 446 tcps_propinfo_tbl[20].prop_min_uval 447 #define tcps_rexmit_interval_max_high tcps_propinfo_tbl[21].prop_max_uval 448 #define tcps_rexmit_interval_max tcps_propinfo_tbl[21].prop_cur_uval 449 #define tcps_rexmit_interval_max_low tcps_propinfo_tbl[21].prop_min_uval 450 #define tcps_rexmit_interval_min_high tcps_propinfo_tbl[22].prop_max_uval 451 #define tcps_rexmit_interval_min tcps_propinfo_tbl[22].prop_cur_uval 452 #define tcps_rexmit_interval_min_low tcps_propinfo_tbl[22].prop_min_uval 453 #define tcps_deferred_ack_interval tcps_propinfo_tbl[23].prop_cur_uval 454 #define tcps_snd_lowat_fraction tcps_propinfo_tbl[24].prop_cur_uval 455 #define tcps_dupack_fast_retransmit tcps_propinfo_tbl[25].prop_cur_uval 456 #define tcps_ignore_path_mtu tcps_propinfo_tbl[26].prop_cur_bval 457 #define tcps_smallest_anon_port tcps_propinfo_tbl[27].prop_cur_uval 458 #define tcps_largest_anon_port tcps_propinfo_tbl[28].prop_cur_uval 459 #define tcps_xmit_hiwat tcps_propinfo_tbl[29].prop_cur_uval 460 #define tcps_xmit_lowat tcps_propinfo_tbl[30].prop_cur_uval 461 #define tcps_recv_hiwat tcps_propinfo_tbl[31].prop_cur_uval 462 #define tcps_recv_hiwat_minmss tcps_propinfo_tbl[32].prop_cur_uval 463 #define tcps_fin_wait_2_flush_interval_high \ 464 tcps_propinfo_tbl[33].prop_max_uval 465 #define tcps_fin_wait_2_flush_interval tcps_propinfo_tbl[33].prop_cur_uval 466 #define tcps_fin_wait_2_flush_interval_low \ 467 tcps_propinfo_tbl[33].prop_min_uval 468 #define tcps_max_buf tcps_propinfo_tbl[34].prop_cur_uval 469 #define tcps_strong_iss tcps_propinfo_tbl[35].prop_cur_uval 470 #define tcps_rtt_updates tcps_propinfo_tbl[36].prop_cur_uval 471 #define tcps_wscale_always tcps_propinfo_tbl[37].prop_cur_bval 472 #define tcps_tstamp_always tcps_propinfo_tbl[38].prop_cur_bval 473 #define tcps_tstamp_if_wscale tcps_propinfo_tbl[39].prop_cur_bval 474 #define tcps_rexmit_interval_extra tcps_propinfo_tbl[40].prop_cur_uval 475 #define tcps_deferred_acks_max tcps_propinfo_tbl[41].prop_cur_uval 476 #define tcps_slow_start_after_idle tcps_propinfo_tbl[42].prop_cur_uval 477 #define tcps_slow_start_initial tcps_propinfo_tbl[43].prop_cur_uval 478 #define tcps_sack_permitted tcps_propinfo_tbl[44].prop_cur_uval 479 #define tcps_ipv6_hoplimit tcps_propinfo_tbl[45].prop_cur_uval 480 #define tcps_mss_def_ipv6 tcps_propinfo_tbl[46].prop_cur_uval 481 #define tcps_mss_max_ipv6 tcps_propinfo_tbl[47].prop_cur_uval 482 #define tcps_rev_src_routes tcps_propinfo_tbl[48].prop_cur_bval 483 #define tcps_local_dack_interval tcps_propinfo_tbl[49].prop_cur_uval 484 #define tcps_local_dacks_max tcps_propinfo_tbl[50].prop_cur_uval 485 #define tcps_ecn_permitted tcps_propinfo_tbl[51].prop_cur_uval 486 #define tcps_rst_sent_rate_enabled tcps_propinfo_tbl[52].prop_cur_bval 487 #define tcps_rst_sent_rate tcps_propinfo_tbl[53].prop_cur_uval 488 #define tcps_push_timer_interval tcps_propinfo_tbl[54].prop_cur_uval 489 #define tcps_use_smss_as_mss_opt tcps_propinfo_tbl[55].prop_cur_bval 490 #define tcps_keepalive_abort_interval_high \ 491 tcps_propinfo_tbl[56].prop_max_uval 492 #define tcps_keepalive_abort_interval \ 493 tcps_propinfo_tbl[56].prop_cur_uval 494 #define tcps_keepalive_abort_interval_low \ 495 tcps_propinfo_tbl[56].prop_min_uval 496 #define tcps_wroff_xtra tcps_propinfo_tbl[57].prop_cur_uval 497 #define tcps_dev_flow_ctl tcps_propinfo_tbl[58].prop_cur_bval 498 #define tcps_reass_timeout tcps_propinfo_tbl[59].prop_cur_uval 499 500 extern struct qinit tcp_rinitv4, tcp_rinitv6; 501 extern boolean_t do_tcp_fusion; 502 503 /* 504 * Object to represent database of options to search passed to 505 * {sock,tpi}optcom_req() interface routine to take care of option 506 * management and associated methods. 507 */ 508 extern optdb_obj_t tcp_opt_obj; 509 extern uint_t tcp_max_optsize; 510 511 extern int tcp_squeue_flag; 512 513 extern uint_t tcp_free_list_max_cnt; 514 515 /* 516 * Functions in tcp.c. 517 */ 518 extern void tcp_acceptor_hash_insert(t_uscalar_t, tcp_t *); 519 extern tcp_t *tcp_acceptor_hash_lookup(t_uscalar_t, tcp_stack_t *); 520 extern void tcp_acceptor_hash_remove(tcp_t *); 521 extern mblk_t *tcp_ack_mp(tcp_t *); 522 extern int tcp_build_hdrs(tcp_t *); 523 extern void tcp_cleanup(tcp_t *); 524 extern int tcp_clean_death(tcp_t *, int); 525 extern void tcp_clean_death_wrapper(void *, mblk_t *, void *, 526 ip_recv_attr_t *); 527 extern void tcp_close_common(conn_t *, int); 528 extern void tcp_close_detached(tcp_t *); 529 extern void tcp_close_mpp(mblk_t **); 530 extern void tcp_closei_local(tcp_t *); 531 extern sock_lower_handle_t tcp_create(int, int, int, sock_downcalls_t **, 532 uint_t *, int *, int, cred_t *); 533 extern conn_t *tcp_create_common(cred_t *, boolean_t, boolean_t, int *); 534 extern void tcp_disconnect(tcp_t *, mblk_t *); 535 extern char *tcp_display(tcp_t *, char *, char); 536 extern int tcp_do_bind(conn_t *, struct sockaddr *, socklen_t, cred_t *, 537 boolean_t); 538 extern int tcp_do_connect(conn_t *, const struct sockaddr *, socklen_t, 539 cred_t *, pid_t); 540 extern int tcp_do_listen(conn_t *, struct sockaddr *, socklen_t, int, 541 cred_t *, boolean_t); 542 extern int tcp_do_unbind(conn_t *); 543 extern boolean_t tcp_eager_blowoff(tcp_t *, t_scalar_t); 544 extern void tcp_eager_cleanup(tcp_t *, boolean_t); 545 extern void tcp_eager_kill(void *, mblk_t *, void *, ip_recv_attr_t *); 546 extern void tcp_eager_unlink(tcp_t *); 547 extern int tcp_getpeername(sock_lower_handle_t, struct sockaddr *, 548 socklen_t *, cred_t *); 549 extern int tcp_getsockname(sock_lower_handle_t, struct sockaddr *, 550 socklen_t *, cred_t *); 551 extern void tcp_init_values(tcp_t *, tcp_t *); 552 extern void tcp_ipsec_cleanup(tcp_t *); 553 extern int tcp_maxpsz_set(tcp_t *, boolean_t); 554 extern void tcp_mss_set(tcp_t *, uint32_t); 555 extern void tcp_reinput(conn_t *, mblk_t *, ip_recv_attr_t *, ip_stack_t *); 556 extern void tcp_rsrv(queue_t *); 557 extern uint_t tcp_rwnd_reopen(tcp_t *); 558 extern int tcp_rwnd_set(tcp_t *, uint32_t); 559 extern int tcp_set_destination(tcp_t *); 560 extern void tcp_set_ws_value(tcp_t *); 561 extern void tcp_stop_lingering(tcp_t *); 562 extern void tcp_update_pmtu(tcp_t *, boolean_t); 563 extern mblk_t *tcp_zcopy_backoff(tcp_t *, mblk_t *, boolean_t); 564 extern boolean_t tcp_zcopy_check(tcp_t *); 565 extern void tcp_zcopy_notify(tcp_t *); 566 extern void tcp_get_proto_props(tcp_t *, struct sock_proto_props *); 567 568 /* 569 * Bind related functions in tcp_bind.c 570 */ 571 extern int tcp_bind_check(conn_t *, struct sockaddr *, socklen_t, 572 cred_t *, boolean_t); 573 extern void tcp_bind_hash_insert(tf_t *, tcp_t *, int); 574 extern void tcp_bind_hash_remove(tcp_t *); 575 extern in_port_t tcp_bindi(tcp_t *, in_port_t, const in6_addr_t *, 576 int, boolean_t, boolean_t, boolean_t); 577 extern in_port_t tcp_update_next_port(in_port_t, const tcp_t *, 578 boolean_t); 579 580 /* 581 * Fusion related functions in tcp_fusion.c. 582 */ 583 extern void tcp_fuse(tcp_t *, uchar_t *, tcpha_t *); 584 extern void tcp_unfuse(tcp_t *); 585 extern boolean_t tcp_fuse_output(tcp_t *, mblk_t *, uint32_t); 586 extern void tcp_fuse_output_urg(tcp_t *, mblk_t *); 587 extern boolean_t tcp_fuse_rcv_drain(queue_t *, tcp_t *, mblk_t **); 588 extern size_t tcp_fuse_set_rcv_hiwat(tcp_t *, size_t); 589 extern int tcp_fuse_maxpsz(tcp_t *); 590 extern void tcp_fuse_backenable(tcp_t *); 591 extern void tcp_iss_key_init(uint8_t *, int, tcp_stack_t *); 592 593 /* 594 * Output related functions in tcp_output.c. 595 */ 596 extern void tcp_close_output(void *, mblk_t *, void *, ip_recv_attr_t *); 597 extern void tcp_output(void *, mblk_t *, void *, ip_recv_attr_t *); 598 extern void tcp_output_urgent(void *, mblk_t *, void *, ip_recv_attr_t *); 599 extern void tcp_rexmit_after_error(tcp_t *); 600 extern void tcp_sack_rexmit(tcp_t *, uint_t *); 601 extern void tcp_send_data(tcp_t *, mblk_t *); 602 extern void tcp_send_synack(void *, mblk_t *, void *, ip_recv_attr_t *); 603 extern void tcp_shutdown_output(void *, mblk_t *, void *, ip_recv_attr_t *); 604 extern void tcp_ss_rexmit(tcp_t *); 605 extern void tcp_update_xmit_tail(tcp_t *, uint32_t); 606 extern void tcp_wput(queue_t *, mblk_t *); 607 extern void tcp_wput_data(tcp_t *, mblk_t *, boolean_t); 608 extern void tcp_wput_sock(queue_t *, mblk_t *); 609 extern void tcp_wput_fallback(queue_t *, mblk_t *); 610 extern void tcp_xmit_ctl(char *, tcp_t *, uint32_t, uint32_t, int); 611 extern void tcp_xmit_listeners_reset(mblk_t *, ip_recv_attr_t *, 612 ip_stack_t *i, conn_t *); 613 extern mblk_t *tcp_xmit_mp(tcp_t *, mblk_t *, int32_t, int32_t *, 614 mblk_t **, uint32_t, boolean_t, uint32_t *, boolean_t); 615 616 /* 617 * Input related functions in tcp_input.c. 618 */ 619 extern void tcp_icmp_input(void *, mblk_t *, void *, ip_recv_attr_t *); 620 extern void tcp_input_data(void *, mblk_t *, void *, ip_recv_attr_t *); 621 extern void tcp_input_listener_unbound(void *, mblk_t *, void *, 622 ip_recv_attr_t *); 623 extern boolean_t tcp_paws_check(tcp_t *, tcpha_t *, tcp_opt_t *); 624 extern uint_t tcp_rcv_drain(tcp_t *); 625 extern void tcp_rcv_enqueue(tcp_t *, mblk_t *, uint_t, cred_t *); 626 extern boolean_t tcp_verifyicmp(conn_t *, void *, icmph_t *, icmp6_t *, 627 ip_recv_attr_t *); 628 629 /* 630 * Kernel socket related functions in tcp_socket.c. 631 */ 632 extern int tcp_fallback(sock_lower_handle_t, queue_t *, boolean_t, 633 so_proto_quiesced_cb_t, sock_quiesce_arg_t *); 634 extern boolean_t tcp_newconn_notify(tcp_t *, ip_recv_attr_t *); 635 636 /* 637 * Timer related functions in tcp_timers.c. 638 */ 639 extern void tcp_ack_timer(void *); 640 extern void tcp_close_linger_timeout(void *); 641 extern void tcp_keepalive_timer(void *); 642 extern void tcp_push_timer(void *); 643 extern void tcp_reass_timer(void *); 644 extern mblk_t *tcp_timermp_alloc(int); 645 extern void tcp_timermp_free(tcp_t *); 646 extern timeout_id_t tcp_timeout(conn_t *, void (*)(void *), hrtime_t); 647 extern clock_t tcp_timeout_cancel(conn_t *, timeout_id_t); 648 extern void tcp_timer(void *arg); 649 extern void tcp_timers_stop(tcp_t *); 650 651 /* 652 * TCP TPI related functions in tcp_tpi.c. 653 */ 654 extern void tcp_addr_req(tcp_t *, mblk_t *); 655 extern void tcp_capability_req(tcp_t *, mblk_t *); 656 extern boolean_t tcp_conn_con(tcp_t *, uchar_t *, mblk_t *, 657 mblk_t **, ip_recv_attr_t *); 658 extern void tcp_err_ack(tcp_t *, mblk_t *, int, int); 659 extern void tcp_err_ack_prim(tcp_t *, mblk_t *, int, int, int); 660 extern void tcp_info_req(tcp_t *, mblk_t *); 661 extern void tcp_send_conn_ind(void *, mblk_t *, void *); 662 extern void tcp_send_pending(void *, mblk_t *, void *, ip_recv_attr_t *); 663 extern void tcp_tpi_accept(queue_t *, mblk_t *); 664 extern void tcp_tpi_bind(tcp_t *, mblk_t *); 665 extern int tcp_tpi_close(queue_t *, int); 666 extern int tcp_tpi_close_accept(queue_t *); 667 extern void tcp_tpi_connect(tcp_t *, mblk_t *); 668 extern int tcp_tpi_opt_get(queue_t *, t_scalar_t, t_scalar_t, uchar_t *); 669 extern int tcp_tpi_opt_set(queue_t *, uint_t, int, int, uint_t, uchar_t *, 670 uint_t *, uchar_t *, void *, cred_t *); 671 extern void tcp_tpi_unbind(tcp_t *, mblk_t *); 672 extern void tcp_tli_accept(tcp_t *, mblk_t *); 673 extern void tcp_use_pure_tpi(tcp_t *); 674 extern void tcp_do_capability_ack(tcp_t *, struct T_capability_ack *, 675 t_uscalar_t); 676 677 /* 678 * TCP option processing related functions in tcp_opt_data.c 679 */ 680 extern int tcp_opt_default(queue_t *, t_scalar_t, t_scalar_t, uchar_t *); 681 extern int tcp_opt_get(conn_t *, int, int, uchar_t *); 682 extern int tcp_opt_set(conn_t *, uint_t, int, int, uint_t, uchar_t *, 683 uint_t *, uchar_t *, void *, cred_t *); 684 685 /* 686 * TCP time wait processing related functions in tcp_time_wait.c. 687 */ 688 extern void tcp_time_wait_append(tcp_t *); 689 extern void tcp_time_wait_collector(void *); 690 extern boolean_t tcp_time_wait_remove(tcp_t *, tcp_squeue_priv_t *); 691 extern void tcp_time_wait_processing(tcp_t *, mblk_t *, uint32_t, 692 uint32_t, int, tcpha_t *, ip_recv_attr_t *); 693 694 /* 695 * Misc functions in tcp_misc.c. 696 */ 697 extern uint32_t tcp_find_listener_conf(tcp_stack_t *, in_port_t); 698 extern void tcp_ioctl_abort_conn(queue_t *, mblk_t *); 699 extern void tcp_listener_conf_cleanup(tcp_stack_t *); 700 extern void tcp_stack_cpu_add(tcp_stack_t *, processorid_t); 701 702 #endif /* _KERNEL */ 703 704 #ifdef __cplusplus 705 } 706 #endif 707 708 #endif /* _INET_TCP_IMPL_H */ 709