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 * Copyright (c) 2011, Joyent Inc. All rights reserved. 24 */ 25 26 #ifndef _INET_TCP_IMPL_H 27 #define _INET_TCP_IMPL_H 28 29 /* 30 * TCP implementation private declarations. These interfaces are 31 * used to build the IP module and are not meant to be accessed 32 * by any modules except IP itself. They are undocumented and are 33 * subject to change without notice. 34 */ 35 36 #ifdef __cplusplus 37 extern "C" { 38 #endif 39 40 #ifdef _KERNEL 41 42 #include <sys/cpuvar.h> 43 #include <sys/clock_impl.h> /* For LBOLT_FASTPATH{,64} */ 44 #include <inet/optcom.h> 45 #include <inet/tcp.h> 46 #include <inet/tunables.h> 47 48 #define TCP_MOD_ID 5105 49 50 extern struct qinit tcp_sock_winit; 51 extern struct qinit tcp_winit; 52 53 extern sock_downcalls_t sock_tcp_downcalls; 54 55 /* 56 * Bind hash list size and has function. It has to be a power of 2 for 57 * hashing. 58 */ 59 #define TCP_BIND_FANOUT_SIZE 1024 60 #define TCP_BIND_HASH(lport) (ntohs(lport) & (TCP_BIND_FANOUT_SIZE - 1)) 61 62 /* 63 * This implementation follows the 4.3BSD interpretation of the urgent 64 * pointer and not RFC 1122. Switching to RFC 1122 behavior would cause 65 * incompatible changes in protocols like telnet and rlogin. 66 */ 67 #define TCP_OLD_URP_INTERPRETATION 1 68 69 /* TCP option length */ 70 #define TCPOPT_NOP_LEN 1 71 #define TCPOPT_MAXSEG_LEN 4 72 #define TCPOPT_WS_LEN 3 73 #define TCPOPT_REAL_WS_LEN (TCPOPT_WS_LEN+1) 74 #define TCPOPT_TSTAMP_LEN 10 75 #define TCPOPT_REAL_TS_LEN (TCPOPT_TSTAMP_LEN+2) 76 #define TCPOPT_SACK_OK_LEN 2 77 #define TCPOPT_REAL_SACK_OK_LEN (TCPOPT_SACK_OK_LEN+2) 78 #define TCPOPT_REAL_SACK_LEN 4 79 #define TCPOPT_MAX_SACK_LEN 36 80 #define TCPOPT_HEADER_LEN 2 81 82 /* Round up the value to the nearest mss. */ 83 #define MSS_ROUNDUP(value, mss) ((((value) - 1) / (mss) + 1) * (mss)) 84 85 /* 86 * Was this tcp created via socket() interface? 87 */ 88 #define TCP_IS_SOCKET(tcp) ((tcp)->tcp_issocket) 89 90 /* 91 * Is this tcp not attached to any upper client? 92 */ 93 #define TCP_IS_DETACHED(tcp) ((tcp)->tcp_detached) 94 95 /* TCP timers related data strucutres. Refer to tcp_timers.c. */ 96 typedef struct tcp_timer_s { 97 conn_t *connp; 98 void (*tcpt_proc)(void *); 99 callout_id_t tcpt_tid; 100 } tcp_timer_t; 101 102 extern kmem_cache_t *tcp_timercache; 103 104 /* 105 * Macro for starting various timers. Retransmission timer has its own macro, 106 * TCP_TIMER_RESTART(). tim is in millisec. 107 */ 108 #define TCP_TIMER(tcp, f, tim) \ 109 tcp_timeout(tcp->tcp_connp, f, tim) 110 #define TCP_TIMER_CANCEL(tcp, id) \ 111 tcp_timeout_cancel(tcp->tcp_connp, id) 112 113 /* 114 * To restart the TCP retransmission timer. intvl is in millisec. 115 */ 116 #define TCP_TIMER_RESTART(tcp, intvl) { \ 117 if ((tcp)->tcp_timer_tid != 0) \ 118 (void) TCP_TIMER_CANCEL((tcp), (tcp)->tcp_timer_tid); \ 119 (tcp)->tcp_timer_tid = TCP_TIMER((tcp), tcp_timer, (intvl)); \ 120 } 121 122 /* 123 * For scalability, we must not run a timer for every TCP connection 124 * in TIME_WAIT state. To see why, consider (for time wait interval of 125 * 1 minutes): 126 * 10,000 connections/sec * 60 seconds/time wait = 600,000 active conn's 127 * 128 * This list is ordered by time, so you need only delete from the head 129 * until you get to entries which aren't old enough to delete yet. 130 * The list consists of only the detached TIME_WAIT connections. 131 * 132 * When a tcp_t enters TIME_WAIT state, a timer is started (timeout is 133 * tcps_time_wait_interval). When the tcp_t is detached (upper layer closes 134 * the end point), it is moved to the time wait list and another timer is 135 * started (expiry time is set at tcp_time_wait_expire, which is 136 * also calculated using tcps_time_wait_interval). This means that the 137 * TIME_WAIT state can be extended (up to doubled) if the tcp_t doesn't 138 * become detached for a long time. 139 * 140 * The list manipulations (including tcp_time_wait_next/prev) 141 * are protected by the tcp_time_wait_lock. The content of the 142 * detached TIME_WAIT connections is protected by the normal perimeters. 143 * 144 * This list is per squeue and squeues are shared across the tcp_stack_t's. 145 * Things on tcp_time_wait_head remain associated with the tcp_stack_t 146 * and conn_netstack. 147 * The tcp_t's that are added to tcp_free_list are disassociated and 148 * have NULL tcp_tcps and conn_netstack pointers. 149 */ 150 typedef struct tcp_squeue_priv_s { 151 kmutex_t tcp_time_wait_lock; 152 callout_id_t tcp_time_wait_tid; 153 tcp_t *tcp_time_wait_head; 154 tcp_t *tcp_time_wait_tail; 155 tcp_t *tcp_free_list; 156 uint_t tcp_free_list_cnt; 157 #ifdef DEBUG 158 /* 159 * For debugging purpose, true when tcp_time_wait_collector() is 160 * running. 161 */ 162 boolean_t tcp_time_wait_running; 163 #endif 164 } tcp_squeue_priv_t; 165 166 /* 167 * Parameters for TCP Initial Send Sequence number (ISS) generation. When 168 * tcp_strong_iss is set to 1, which is the default, the ISS is calculated 169 * by adding three components: a time component which grows by 1 every 4096 170 * nanoseconds (versus every 4 microseconds suggested by RFC 793, page 27); 171 * a per-connection component which grows by 125000 for every new connection; 172 * and an "extra" component that grows by a random amount centered 173 * approximately on 64000. This causes the ISS generator to cycle every 174 * 4.89 hours if no TCP connections are made, and faster if connections are 175 * made. 176 * 177 * When tcp_strong_iss is set to 0, ISS is calculated by adding two 178 * components: a time component which grows by 250000 every second; and 179 * a per-connection component which grows by 125000 for every new connections. 180 * 181 * A third method, when tcp_strong_iss is set to 2, for generating ISS is 182 * prescribed by Steve Bellovin. This involves adding time, the 125000 per 183 * connection, and a one-way hash (MD5) of the connection ID <sport, dport, 184 * src, dst>, a "truly" random (per RFC 1750) number, and a console-entered 185 * password. 186 */ 187 #define ISS_INCR 250000 188 #define ISS_NSEC_SHT 12 189 190 /* Macros for timestamp comparisons */ 191 #define TSTMP_GEQ(a, b) ((int32_t)((a)-(b)) >= 0) 192 #define TSTMP_LT(a, b) ((int32_t)((a)-(b)) < 0) 193 194 /* 195 * Initialize cwnd according to RFC 3390. def_max_init_cwnd is 196 * either tcp_slow_start_initial or tcp_slow_start_after idle 197 * depending on the caller. If the upper layer has not used the 198 * TCP_INIT_CWND option to change the initial cwnd, tcp_init_cwnd 199 * should be 0 and we use the formula in RFC 3390 to set tcp_cwnd. 200 * If the upper layer has changed set the tcp_init_cwnd, just use 201 * it to calculate the tcp_cwnd. 202 */ 203 #define TCP_SET_INIT_CWND(tcp, mss, def_max_init_cwnd) \ 204 { \ 205 if ((tcp)->tcp_init_cwnd == 0) { \ 206 (tcp)->tcp_cwnd = MIN(def_max_init_cwnd * (mss), \ 207 MIN(4 * (mss), MAX(2 * (mss), 4380 / (mss) * (mss)))); \ 208 } else { \ 209 (tcp)->tcp_cwnd = (tcp)->tcp_init_cwnd * (mss); \ 210 } \ 211 tcp->tcp_cwnd_cnt = 0; \ 212 } 213 214 /* 215 * Set ECN capable transport (ECT) code point in IP header. 216 * 217 * Note that there are 2 ECT code points '01' and '10', which are called 218 * ECT(1) and ECT(0) respectively. Here we follow the original ECT code 219 * point ECT(0) for TCP as described in RFC 2481. 220 */ 221 #define TCP_SET_ECT(tcp, iph) \ 222 if ((tcp)->tcp_connp->conn_ipversion == IPV4_VERSION) { \ 223 /* We need to clear the code point first. */ \ 224 ((ipha_t *)(iph))->ipha_type_of_service &= 0xFC; \ 225 ((ipha_t *)(iph))->ipha_type_of_service |= IPH_ECN_ECT0; \ 226 } else { \ 227 ((ip6_t *)(iph))->ip6_vcf &= htonl(0xFFCFFFFF); \ 228 ((ip6_t *)(iph))->ip6_vcf |= htonl(IPH_ECN_ECT0 << 20); \ 229 } 230 231 /* 232 * Set tcp_rto with boundary checking. 233 */ 234 #define TCP_SET_RTO(tcp, rto) \ 235 if ((rto) < (tcp)->tcp_rto_min) \ 236 (tcp)->tcp_rto = (tcp)->tcp_rto_min; \ 237 else if ((rto) > (tcp)->tcp_rto_max) \ 238 (tcp)->tcp_rto = (tcp)->tcp_rto_max; \ 239 else \ 240 (tcp)->tcp_rto = (rto); 241 242 /* 243 * TCP options struct returned from tcp_parse_options. 244 */ 245 typedef struct tcp_opt_s { 246 uint32_t tcp_opt_mss; 247 uint32_t tcp_opt_wscale; 248 uint32_t tcp_opt_ts_val; 249 uint32_t tcp_opt_ts_ecr; 250 tcp_t *tcp; 251 } tcp_opt_t; 252 253 /* 254 * Write-side flow-control is implemented via the per instance STREAMS 255 * write-side Q by explicitly setting QFULL to stop the flow of mblk_t(s) 256 * and clearing QFULL and calling qbackenable() to restart the flow based 257 * on the number of TCP unsent bytes (i.e. those not on the wire waiting 258 * for a remote ACK). 259 * 260 * This is different than a standard STREAMS kmod which when using the 261 * STREAMS Q the framework would automatictly flow-control based on the 262 * defined hiwat/lowat values as mblk_t's are enqueued/dequeued. 263 * 264 * As of FireEngine TCP write-side flow-control needs to take into account 265 * both the unsent tcp_xmit list bytes but also any squeue_t enqueued bytes 266 * (i.e. from tcp_wput() -> tcp_output()). 267 * 268 * This is accomplished by adding a new tcp_t fields, tcp_squeue_bytes, to 269 * count the number of bytes enqueued by tcp_wput() and the number of bytes 270 * dequeued and processed by tcp_output(). 271 * 272 * So, the total number of bytes unsent is (squeue_bytes + unsent) with all 273 * flow-control uses of unsent replaced with the macro TCP_UNSENT_BYTES. 274 */ 275 extern void tcp_clrqfull(tcp_t *); 276 extern void tcp_setqfull(tcp_t *); 277 278 #define TCP_UNSENT_BYTES(tcp) \ 279 ((tcp)->tcp_squeue_bytes + (tcp)->tcp_unsent) 280 281 /* 282 * Linked list struct to store listener connection limit configuration per 283 * IP stack. The list is stored at tcps_listener_conf in tcp_stack_t. 284 * 285 * tl_port: the listener port of this limit configuration 286 * tl_ratio: the maximum amount of memory consumed by all concurrent TCP 287 * connections created by a listener does not exceed 1/tl_ratio 288 * of the total system memory. Note that this is only an 289 * approximation. 290 * tl_link: linked list struct 291 */ 292 typedef struct tcp_listener_s { 293 in_port_t tl_port; 294 uint32_t tl_ratio; 295 list_node_t tl_link; 296 } tcp_listener_t; 297 298 /* 299 * If there is a limit set on the number of connections allowed per each 300 * listener, the following struct is used to store that counter. It keeps 301 * the number of TCP connection created by a listener. Note that this needs 302 * to be separated from the listener since the listener can go away before 303 * all the connections are gone. 304 * 305 * When the struct is allocated, tlc_cnt is set to 1. When a new connection 306 * is created by the listener, tlc_cnt is incremented by 1. When a connection 307 * created by the listener goes away, tlc_count is decremented by 1. When the 308 * listener itself goes away, tlc_cnt is decremented by one. The last 309 * connection (or the listener) which decrements tlc_cnt to zero frees the 310 * struct. 311 * 312 * tlc_max is the maximum number of concurrent TCP connections created from a 313 * listner. It is calculated when the tcp_listen_cnt_t is allocated. 314 * 315 * tlc_report_time stores the time when cmn_err() is called to report that the 316 * max has been exceeeded. Report is done at most once every 317 * TCP_TLC_REPORT_INTERVAL mins for a listener. 318 * 319 * tlc_drop stores the number of connection attempt dropped because the 320 * limit has reached. 321 */ 322 typedef struct tcp_listen_cnt_s { 323 uint32_t tlc_max; 324 uint32_t tlc_cnt; 325 int64_t tlc_report_time; 326 uint32_t tlc_drop; 327 } tcp_listen_cnt_t; 328 329 #define TCP_TLC_REPORT_INTERVAL (30 * MINUTES) 330 331 #define TCP_DECR_LISTEN_CNT(tcp) \ 332 { \ 333 ASSERT((tcp)->tcp_listen_cnt->tlc_cnt > 0); \ 334 if (atomic_add_32_nv(&(tcp)->tcp_listen_cnt->tlc_cnt, -1) == 0) \ 335 kmem_free((tcp)->tcp_listen_cnt, sizeof (tcp_listen_cnt_t)); \ 336 (tcp)->tcp_listen_cnt = NULL; \ 337 } 338 339 /* Increment and decrement the number of connections in tcp_stack_t. */ 340 #define TCPS_CONN_INC(tcps) \ 341 atomic_inc_64( \ 342 (uint64_t *)&(tcps)->tcps_sc[CPU->cpu_seqid]->tcp_sc_conn_cnt) 343 344 #define TCPS_CONN_DEC(tcps) \ 345 atomic_dec_64( \ 346 (uint64_t *)&(tcps)->tcps_sc[CPU->cpu_seqid]->tcp_sc_conn_cnt) 347 348 /* 349 * When the system is under memory pressure, stack variable tcps_reclaim is 350 * true, we shorten the connection timeout abort interval to tcp_early_abort 351 * seconds. Defined in tcp.c. 352 */ 353 extern uint32_t tcp_early_abort; 354 355 /* 356 * To reach to an eager in Q0 which can be dropped due to an incoming 357 * new SYN request when Q0 is full, a new doubly linked list is 358 * introduced. This list allows to select an eager from Q0 in O(1) time. 359 * This is needed to avoid spending too much time walking through the 360 * long list of eagers in Q0 when tcp_drop_q0() is called. Each member of 361 * this new list has to be a member of Q0. 362 * This list is headed by listener's tcp_t. When the list is empty, 363 * both the pointers - tcp_eager_next_drop_q0 and tcp_eager_prev_drop_q0, 364 * of listener's tcp_t point to listener's tcp_t itself. 365 * 366 * Given an eager in Q0 and a listener, MAKE_DROPPABLE() puts the eager 367 * in the list. MAKE_UNDROPPABLE() takes the eager out of the list. 368 * These macros do not affect the eager's membership to Q0. 369 */ 370 #define MAKE_DROPPABLE(listener, eager) \ 371 if ((eager)->tcp_eager_next_drop_q0 == NULL) { \ 372 (listener)->tcp_eager_next_drop_q0->tcp_eager_prev_drop_q0\ 373 = (eager); \ 374 (eager)->tcp_eager_prev_drop_q0 = (listener); \ 375 (eager)->tcp_eager_next_drop_q0 = \ 376 (listener)->tcp_eager_next_drop_q0; \ 377 (listener)->tcp_eager_next_drop_q0 = (eager); \ 378 } 379 380 #define MAKE_UNDROPPABLE(eager) \ 381 if ((eager)->tcp_eager_next_drop_q0 != NULL) { \ 382 (eager)->tcp_eager_next_drop_q0->tcp_eager_prev_drop_q0 \ 383 = (eager)->tcp_eager_prev_drop_q0; \ 384 (eager)->tcp_eager_prev_drop_q0->tcp_eager_next_drop_q0 \ 385 = (eager)->tcp_eager_next_drop_q0; \ 386 (eager)->tcp_eager_prev_drop_q0 = NULL; \ 387 (eager)->tcp_eager_next_drop_q0 = NULL; \ 388 } 389 390 /* 391 * The format argument to pass to tcp_display(). 392 * DISP_PORT_ONLY means that the returned string has only port info. 393 * DISP_ADDR_AND_PORT means that the returned string also contains the 394 * remote and local IP address. 395 */ 396 #define DISP_PORT_ONLY 1 397 #define DISP_ADDR_AND_PORT 2 398 399 #define IP_ADDR_CACHE_SIZE 2048 400 #define IP_ADDR_CACHE_HASH(faddr) \ 401 (ntohl(faddr) & (IP_ADDR_CACHE_SIZE -1)) 402 403 /* TCP cwnd burst factor. */ 404 #define TCP_CWND_INFINITE 65535 405 #define TCP_CWND_SS 3 406 #define TCP_CWND_NORMAL 5 407 408 /* 409 * TCP reassembly macros. We hide starting and ending sequence numbers in 410 * b_next and b_prev of messages on the reassembly queue. The messages are 411 * chained using b_cont. These macros are used in tcp_reass() so we don't 412 * have to see the ugly casts and assignments. 413 */ 414 #define TCP_REASS_SEQ(mp) ((uint32_t)(uintptr_t)((mp)->b_next)) 415 #define TCP_REASS_SET_SEQ(mp, u) ((mp)->b_next = \ 416 (mblk_t *)(uintptr_t)(u)) 417 #define TCP_REASS_END(mp) ((uint32_t)(uintptr_t)((mp)->b_prev)) 418 #define TCP_REASS_SET_END(mp, u) ((mp)->b_prev = \ 419 (mblk_t *)(uintptr_t)(u)) 420 421 #define tcps_time_wait_interval tcps_propinfo_tbl[0].prop_cur_uval 422 #define tcps_conn_req_max_q tcps_propinfo_tbl[1].prop_cur_uval 423 #define tcps_conn_req_max_q0 tcps_propinfo_tbl[2].prop_cur_uval 424 #define tcps_conn_req_min tcps_propinfo_tbl[3].prop_cur_uval 425 #define tcps_conn_grace_period tcps_propinfo_tbl[4].prop_cur_uval 426 #define tcps_cwnd_max_ tcps_propinfo_tbl[5].prop_cur_uval 427 #define tcps_dbg tcps_propinfo_tbl[6].prop_cur_uval 428 #define tcps_smallest_nonpriv_port tcps_propinfo_tbl[7].prop_cur_uval 429 #define tcps_ip_abort_cinterval tcps_propinfo_tbl[8].prop_cur_uval 430 #define tcps_ip_abort_linterval tcps_propinfo_tbl[9].prop_cur_uval 431 #define tcps_ip_abort_interval tcps_propinfo_tbl[10].prop_cur_uval 432 #define tcps_ip_notify_cinterval tcps_propinfo_tbl[11].prop_cur_uval 433 #define tcps_ip_notify_interval tcps_propinfo_tbl[12].prop_cur_uval 434 #define tcps_ipv4_ttl tcps_propinfo_tbl[13].prop_cur_uval 435 #define tcps_keepalive_interval_high tcps_propinfo_tbl[14].prop_max_uval 436 #define tcps_keepalive_interval tcps_propinfo_tbl[14].prop_cur_uval 437 #define tcps_keepalive_interval_low tcps_propinfo_tbl[14].prop_min_uval 438 #define tcps_maxpsz_multiplier tcps_propinfo_tbl[15].prop_cur_uval 439 #define tcps_mss_def_ipv4 tcps_propinfo_tbl[16].prop_cur_uval 440 #define tcps_mss_max_ipv4 tcps_propinfo_tbl[17].prop_cur_uval 441 #define tcps_mss_min tcps_propinfo_tbl[18].prop_cur_uval 442 #define tcps_naglim_def tcps_propinfo_tbl[19].prop_cur_uval 443 #define tcps_rexmit_interval_initial_high \ 444 tcps_propinfo_tbl[20].prop_max_uval 445 #define tcps_rexmit_interval_initial tcps_propinfo_tbl[20].prop_cur_uval 446 #define tcps_rexmit_interval_initial_low \ 447 tcps_propinfo_tbl[20].prop_min_uval 448 #define tcps_rexmit_interval_max_high tcps_propinfo_tbl[21].prop_max_uval 449 #define tcps_rexmit_interval_max tcps_propinfo_tbl[21].prop_cur_uval 450 #define tcps_rexmit_interval_max_low tcps_propinfo_tbl[21].prop_min_uval 451 #define tcps_rexmit_interval_min_high tcps_propinfo_tbl[22].prop_max_uval 452 #define tcps_rexmit_interval_min tcps_propinfo_tbl[22].prop_cur_uval 453 #define tcps_rexmit_interval_min_low tcps_propinfo_tbl[22].prop_min_uval 454 #define tcps_deferred_ack_interval tcps_propinfo_tbl[23].prop_cur_uval 455 #define tcps_snd_lowat_fraction tcps_propinfo_tbl[24].prop_cur_uval 456 #define tcps_dupack_fast_retransmit tcps_propinfo_tbl[25].prop_cur_uval 457 #define tcps_ignore_path_mtu tcps_propinfo_tbl[26].prop_cur_bval 458 #define tcps_smallest_anon_port tcps_propinfo_tbl[27].prop_cur_uval 459 #define tcps_largest_anon_port tcps_propinfo_tbl[28].prop_cur_uval 460 #define tcps_xmit_hiwat tcps_propinfo_tbl[29].prop_cur_uval 461 #define tcps_xmit_lowat tcps_propinfo_tbl[30].prop_cur_uval 462 #define tcps_recv_hiwat tcps_propinfo_tbl[31].prop_cur_uval 463 #define tcps_recv_hiwat_minmss tcps_propinfo_tbl[32].prop_cur_uval 464 #define tcps_fin_wait_2_flush_interval_high \ 465 tcps_propinfo_tbl[33].prop_max_uval 466 #define tcps_fin_wait_2_flush_interval tcps_propinfo_tbl[33].prop_cur_uval 467 #define tcps_fin_wait_2_flush_interval_low \ 468 tcps_propinfo_tbl[33].prop_min_uval 469 #define tcps_max_buf tcps_propinfo_tbl[34].prop_cur_uval 470 #define tcps_strong_iss tcps_propinfo_tbl[35].prop_cur_uval 471 #define tcps_rtt_updates tcps_propinfo_tbl[36].prop_cur_uval 472 #define tcps_wscale_always tcps_propinfo_tbl[37].prop_cur_bval 473 #define tcps_tstamp_always tcps_propinfo_tbl[38].prop_cur_bval 474 #define tcps_tstamp_if_wscale tcps_propinfo_tbl[39].prop_cur_bval 475 #define tcps_rexmit_interval_extra tcps_propinfo_tbl[40].prop_cur_uval 476 #define tcps_deferred_acks_max tcps_propinfo_tbl[41].prop_cur_uval 477 #define tcps_slow_start_after_idle tcps_propinfo_tbl[42].prop_cur_uval 478 #define tcps_slow_start_initial tcps_propinfo_tbl[43].prop_cur_uval 479 #define tcps_sack_permitted tcps_propinfo_tbl[44].prop_cur_uval 480 #define tcps_ipv6_hoplimit tcps_propinfo_tbl[45].prop_cur_uval 481 #define tcps_mss_def_ipv6 tcps_propinfo_tbl[46].prop_cur_uval 482 #define tcps_mss_max_ipv6 tcps_propinfo_tbl[47].prop_cur_uval 483 #define tcps_rev_src_routes tcps_propinfo_tbl[48].prop_cur_bval 484 #define tcps_local_dack_interval tcps_propinfo_tbl[49].prop_cur_uval 485 #define tcps_local_dacks_max tcps_propinfo_tbl[50].prop_cur_uval 486 #define tcps_ecn_permitted tcps_propinfo_tbl[51].prop_cur_uval 487 #define tcps_rst_sent_rate_enabled tcps_propinfo_tbl[52].prop_cur_bval 488 #define tcps_rst_sent_rate tcps_propinfo_tbl[53].prop_cur_uval 489 #define tcps_push_timer_interval tcps_propinfo_tbl[54].prop_cur_uval 490 #define tcps_use_smss_as_mss_opt tcps_propinfo_tbl[55].prop_cur_bval 491 #define tcps_keepalive_abort_interval_high \ 492 tcps_propinfo_tbl[56].prop_max_uval 493 #define tcps_keepalive_abort_interval \ 494 tcps_propinfo_tbl[56].prop_cur_uval 495 #define tcps_keepalive_abort_interval_low \ 496 tcps_propinfo_tbl[56].prop_min_uval 497 #define tcps_wroff_xtra tcps_propinfo_tbl[57].prop_cur_uval 498 #define tcps_dev_flow_ctl tcps_propinfo_tbl[58].prop_cur_bval 499 #define tcps_reass_timeout tcps_propinfo_tbl[59].prop_cur_uval 500 #define tcps_iss_incr tcps_propinfo_tbl[65].prop_cur_uval 501 502 extern struct qinit tcp_rinitv4, tcp_rinitv6; 503 extern boolean_t do_tcp_fusion; 504 505 /* 506 * Object to represent database of options to search passed to 507 * {sock,tpi}optcom_req() interface routine to take care of option 508 * management and associated methods. 509 */ 510 extern optdb_obj_t tcp_opt_obj; 511 extern uint_t tcp_max_optsize; 512 513 extern int tcp_squeue_flag; 514 515 extern uint_t tcp_free_list_max_cnt; 516 517 /* 518 * Functions in tcp.c. 519 */ 520 extern void tcp_acceptor_hash_insert(t_uscalar_t, tcp_t *); 521 extern tcp_t *tcp_acceptor_hash_lookup(t_uscalar_t, tcp_stack_t *); 522 extern void tcp_acceptor_hash_remove(tcp_t *); 523 extern mblk_t *tcp_ack_mp(tcp_t *); 524 extern int tcp_build_hdrs(tcp_t *); 525 extern void tcp_cleanup(tcp_t *); 526 extern int tcp_clean_death(tcp_t *, int); 527 extern void tcp_clean_death_wrapper(void *, mblk_t *, void *, 528 ip_recv_attr_t *); 529 extern void tcp_close_common(conn_t *, int); 530 extern void tcp_close_detached(tcp_t *); 531 extern void tcp_close_mpp(mblk_t **); 532 extern void tcp_closei_local(tcp_t *); 533 extern sock_lower_handle_t tcp_create(int, int, int, sock_downcalls_t **, 534 uint_t *, int *, int, cred_t *); 535 extern conn_t *tcp_create_common(cred_t *, boolean_t, boolean_t, int *); 536 extern void tcp_disconnect(tcp_t *, mblk_t *); 537 extern char *tcp_display(tcp_t *, char *, char); 538 extern int tcp_do_bind(conn_t *, struct sockaddr *, socklen_t, cred_t *, 539 boolean_t); 540 extern int tcp_do_connect(conn_t *, const struct sockaddr *, socklen_t, 541 cred_t *, pid_t); 542 extern int tcp_do_listen(conn_t *, struct sockaddr *, socklen_t, int, 543 cred_t *, boolean_t); 544 extern int tcp_do_unbind(conn_t *); 545 extern boolean_t tcp_eager_blowoff(tcp_t *, t_scalar_t); 546 extern void tcp_eager_cleanup(tcp_t *, boolean_t); 547 extern void tcp_eager_kill(void *, mblk_t *, void *, ip_recv_attr_t *); 548 extern void tcp_eager_unlink(tcp_t *); 549 extern int tcp_getpeername(sock_lower_handle_t, struct sockaddr *, 550 socklen_t *, cred_t *); 551 extern int tcp_getsockname(sock_lower_handle_t, struct sockaddr *, 552 socklen_t *, cred_t *); 553 extern void tcp_init_values(tcp_t *, tcp_t *); 554 extern void tcp_ipsec_cleanup(tcp_t *); 555 extern int tcp_maxpsz_set(tcp_t *, boolean_t); 556 extern void tcp_mss_set(tcp_t *, uint32_t); 557 extern void tcp_reinput(conn_t *, mblk_t *, ip_recv_attr_t *, ip_stack_t *); 558 extern void tcp_rsrv(queue_t *); 559 extern uint_t tcp_rwnd_reopen(tcp_t *); 560 extern int tcp_rwnd_set(tcp_t *, uint32_t); 561 extern int tcp_set_destination(tcp_t *); 562 extern void tcp_set_ws_value(tcp_t *); 563 extern void tcp_stop_lingering(tcp_t *); 564 extern void tcp_update_pmtu(tcp_t *, boolean_t); 565 extern mblk_t *tcp_zcopy_backoff(tcp_t *, mblk_t *, boolean_t); 566 extern boolean_t tcp_zcopy_check(tcp_t *); 567 extern void tcp_zcopy_notify(tcp_t *); 568 extern void tcp_get_proto_props(tcp_t *, struct sock_proto_props *); 569 570 /* 571 * Bind related functions in tcp_bind.c 572 */ 573 extern int tcp_bind_check(conn_t *, struct sockaddr *, socklen_t, 574 cred_t *, boolean_t); 575 extern void tcp_bind_hash_insert(tf_t *, tcp_t *, int); 576 extern void tcp_bind_hash_remove(tcp_t *); 577 extern in_port_t tcp_bindi(tcp_t *, in_port_t, const in6_addr_t *, 578 int, boolean_t, boolean_t, boolean_t); 579 extern in_port_t tcp_update_next_port(in_port_t, const tcp_t *, 580 boolean_t); 581 582 /* 583 * Fusion related functions in tcp_fusion.c. 584 */ 585 extern void tcp_fuse(tcp_t *, uchar_t *, tcpha_t *); 586 extern void tcp_unfuse(tcp_t *); 587 extern boolean_t tcp_fuse_output(tcp_t *, mblk_t *, uint32_t); 588 extern void tcp_fuse_output_urg(tcp_t *, mblk_t *); 589 extern boolean_t tcp_fuse_rcv_drain(queue_t *, tcp_t *, mblk_t **); 590 extern size_t tcp_fuse_set_rcv_hiwat(tcp_t *, size_t); 591 extern int tcp_fuse_maxpsz(tcp_t *); 592 extern void tcp_fuse_backenable(tcp_t *); 593 extern void tcp_iss_key_init(uint8_t *, int, tcp_stack_t *); 594 595 /* 596 * Output related functions in tcp_output.c. 597 */ 598 extern void tcp_close_output(void *, mblk_t *, void *, ip_recv_attr_t *); 599 extern void tcp_output(void *, mblk_t *, void *, ip_recv_attr_t *); 600 extern void tcp_output_urgent(void *, mblk_t *, void *, ip_recv_attr_t *); 601 extern void tcp_rexmit_after_error(tcp_t *); 602 extern void tcp_sack_rexmit(tcp_t *, uint_t *); 603 extern void tcp_send_data(tcp_t *, mblk_t *); 604 extern void tcp_send_synack(void *, mblk_t *, void *, ip_recv_attr_t *); 605 extern void tcp_shutdown_output(void *, mblk_t *, void *, ip_recv_attr_t *); 606 extern void tcp_ss_rexmit(tcp_t *); 607 extern void tcp_update_xmit_tail(tcp_t *, uint32_t); 608 extern void tcp_wput(queue_t *, mblk_t *); 609 extern void tcp_wput_data(tcp_t *, mblk_t *, boolean_t); 610 extern void tcp_wput_sock(queue_t *, mblk_t *); 611 extern void tcp_wput_fallback(queue_t *, mblk_t *); 612 extern void tcp_xmit_ctl(char *, tcp_t *, uint32_t, uint32_t, int); 613 extern void tcp_xmit_listeners_reset(mblk_t *, ip_recv_attr_t *, 614 ip_stack_t *i, conn_t *); 615 extern mblk_t *tcp_xmit_mp(tcp_t *, mblk_t *, int32_t, int32_t *, 616 mblk_t **, uint32_t, boolean_t, uint32_t *, boolean_t); 617 618 /* 619 * Input related functions in tcp_input.c. 620 */ 621 extern void tcp_icmp_input(void *, mblk_t *, void *, ip_recv_attr_t *); 622 extern void tcp_input_data(void *, mblk_t *, void *, ip_recv_attr_t *); 623 extern void tcp_input_listener_unbound(void *, mblk_t *, void *, 624 ip_recv_attr_t *); 625 extern boolean_t tcp_paws_check(tcp_t *, tcpha_t *, tcp_opt_t *); 626 extern uint_t tcp_rcv_drain(tcp_t *); 627 extern void tcp_rcv_enqueue(tcp_t *, mblk_t *, uint_t, cred_t *); 628 extern boolean_t tcp_verifyicmp(conn_t *, void *, icmph_t *, icmp6_t *, 629 ip_recv_attr_t *); 630 631 /* 632 * Kernel socket related functions in tcp_socket.c. 633 */ 634 extern int tcp_fallback(sock_lower_handle_t, queue_t *, boolean_t, 635 so_proto_quiesced_cb_t, sock_quiesce_arg_t *); 636 extern boolean_t tcp_newconn_notify(tcp_t *, ip_recv_attr_t *); 637 638 /* 639 * Timer related functions in tcp_timers.c. 640 */ 641 extern void tcp_ack_timer(void *); 642 extern void tcp_close_linger_timeout(void *); 643 extern void tcp_keepalive_timer(void *); 644 extern void tcp_push_timer(void *); 645 extern void tcp_reass_timer(void *); 646 extern mblk_t *tcp_timermp_alloc(int); 647 extern void tcp_timermp_free(tcp_t *); 648 extern timeout_id_t tcp_timeout(conn_t *, void (*)(void *), hrtime_t); 649 extern clock_t tcp_timeout_cancel(conn_t *, timeout_id_t); 650 extern void tcp_timer(void *arg); 651 extern void tcp_timers_stop(tcp_t *); 652 653 /* 654 * TCP TPI related functions in tcp_tpi.c. 655 */ 656 extern void tcp_addr_req(tcp_t *, mblk_t *); 657 extern void tcp_capability_req(tcp_t *, mblk_t *); 658 extern boolean_t tcp_conn_con(tcp_t *, uchar_t *, mblk_t *, 659 mblk_t **, ip_recv_attr_t *); 660 extern void tcp_err_ack(tcp_t *, mblk_t *, int, int); 661 extern void tcp_err_ack_prim(tcp_t *, mblk_t *, int, int, int); 662 extern void tcp_info_req(tcp_t *, mblk_t *); 663 extern void tcp_send_conn_ind(void *, mblk_t *, void *); 664 extern void tcp_send_pending(void *, mblk_t *, void *, ip_recv_attr_t *); 665 extern void tcp_tpi_accept(queue_t *, mblk_t *); 666 extern void tcp_tpi_bind(tcp_t *, mblk_t *); 667 extern int tcp_tpi_close(queue_t *, int); 668 extern int tcp_tpi_close_accept(queue_t *); 669 extern void tcp_tpi_connect(tcp_t *, mblk_t *); 670 extern int tcp_tpi_opt_get(queue_t *, t_scalar_t, t_scalar_t, uchar_t *); 671 extern int tcp_tpi_opt_set(queue_t *, uint_t, int, int, uint_t, uchar_t *, 672 uint_t *, uchar_t *, void *, cred_t *); 673 extern void tcp_tpi_unbind(tcp_t *, mblk_t *); 674 extern void tcp_tli_accept(tcp_t *, mblk_t *); 675 extern void tcp_use_pure_tpi(tcp_t *); 676 extern void tcp_do_capability_ack(tcp_t *, struct T_capability_ack *, 677 t_uscalar_t); 678 679 /* 680 * TCP option processing related functions in tcp_opt_data.c 681 */ 682 extern int tcp_opt_default(queue_t *, t_scalar_t, t_scalar_t, uchar_t *); 683 extern int tcp_opt_get(conn_t *, int, int, uchar_t *); 684 extern int tcp_opt_set(conn_t *, uint_t, int, int, uint_t, uchar_t *, 685 uint_t *, uchar_t *, void *, cred_t *); 686 687 /* 688 * TCP time wait processing related functions in tcp_time_wait.c. 689 */ 690 extern void tcp_time_wait_append(tcp_t *); 691 extern void tcp_time_wait_collector(void *); 692 extern boolean_t tcp_time_wait_remove(tcp_t *, tcp_squeue_priv_t *); 693 extern void tcp_time_wait_processing(tcp_t *, mblk_t *, uint32_t, 694 uint32_t, int, tcpha_t *, ip_recv_attr_t *); 695 696 /* 697 * Misc functions in tcp_misc.c. 698 */ 699 extern uint32_t tcp_find_listener_conf(tcp_stack_t *, in_port_t); 700 extern void tcp_ioctl_abort_conn(queue_t *, mblk_t *); 701 extern void tcp_listener_conf_cleanup(tcp_stack_t *); 702 extern void tcp_stack_cpu_add(tcp_stack_t *, processorid_t); 703 704 #endif /* _KERNEL */ 705 706 #ifdef __cplusplus 707 } 708 #endif 709 710 #endif /* _INET_TCP_IMPL_H */ 711