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 * Copyright (c) 2013, OmniTI Computer Consulting, Inc. All rights reserved. 25 */ 26 27 #ifndef _INET_TCP_IMPL_H 28 #define _INET_TCP_IMPL_H 29 30 /* 31 * TCP implementation private declarations. These interfaces are 32 * used to build the IP module and are not meant to be accessed 33 * by any modules except IP itself. They are undocumented and are 34 * subject to change without notice. 35 */ 36 37 #ifdef __cplusplus 38 extern "C" { 39 #endif 40 41 #ifdef _KERNEL 42 43 #include <sys/cpuvar.h> 44 #include <sys/clock_impl.h> /* For LBOLT_FASTPATH{,64} */ 45 #include <inet/optcom.h> 46 #include <inet/tcp.h> 47 #include <inet/tunables.h> 48 49 #define TCP_MOD_ID 5105 50 51 extern struct qinit tcp_sock_winit; 52 extern struct qinit tcp_winit; 53 54 extern sock_downcalls_t sock_tcp_downcalls; 55 56 /* 57 * Bind hash list size and has function. It has to be a power of 2 for 58 * hashing. 59 */ 60 #define TCP_BIND_FANOUT_SIZE 1024 61 #define TCP_BIND_HASH(lport) (ntohs(lport) & (TCP_BIND_FANOUT_SIZE - 1)) 62 63 /* 64 * This implementation follows the 4.3BSD interpretation of the urgent 65 * pointer and not RFC 1122. Switching to RFC 1122 behavior would cause 66 * incompatible changes in protocols like telnet and rlogin. 67 */ 68 #define TCP_OLD_URP_INTERPRETATION 1 69 70 /* TCP option length */ 71 #define TCPOPT_NOP_LEN 1 72 #define TCPOPT_MAXSEG_LEN 4 73 #define TCPOPT_WS_LEN 3 74 #define TCPOPT_REAL_WS_LEN (TCPOPT_WS_LEN+1) 75 #define TCPOPT_TSTAMP_LEN 10 76 #define TCPOPT_REAL_TS_LEN (TCPOPT_TSTAMP_LEN+2) 77 #define TCPOPT_SACK_OK_LEN 2 78 #define TCPOPT_REAL_SACK_OK_LEN (TCPOPT_SACK_OK_LEN+2) 79 #define TCPOPT_REAL_SACK_LEN 4 80 #define TCPOPT_MAX_SACK_LEN 36 81 #define TCPOPT_HEADER_LEN 2 82 83 /* Round up the value to the nearest mss. */ 84 #define MSS_ROUNDUP(value, mss) ((((value) - 1) / (mss) + 1) * (mss)) 85 86 /* 87 * Was this tcp created via socket() interface? 88 */ 89 #define TCP_IS_SOCKET(tcp) ((tcp)->tcp_issocket) 90 91 /* 92 * Is this tcp not attached to any upper client? 93 */ 94 #define TCP_IS_DETACHED(tcp) ((tcp)->tcp_detached) 95 96 /* TCP timers related data strucutres. Refer to tcp_timers.c. */ 97 typedef struct tcp_timer_s { 98 conn_t *connp; 99 void (*tcpt_proc)(void *); 100 callout_id_t tcpt_tid; 101 } tcp_timer_t; 102 103 extern kmem_cache_t *tcp_timercache; 104 105 /* 106 * Macro for starting various timers. Retransmission timer has its own macro, 107 * TCP_TIMER_RESTART(). tim is in millisec. 108 */ 109 #define TCP_TIMER(tcp, f, tim) \ 110 tcp_timeout(tcp->tcp_connp, f, tim) 111 #define TCP_TIMER_CANCEL(tcp, id) \ 112 tcp_timeout_cancel(tcp->tcp_connp, id) 113 114 /* 115 * To restart the TCP retransmission timer. intvl is in millisec. 116 */ 117 #define TCP_TIMER_RESTART(tcp, intvl) { \ 118 if ((tcp)->tcp_timer_tid != 0) \ 119 (void) TCP_TIMER_CANCEL((tcp), (tcp)->tcp_timer_tid); \ 120 (tcp)->tcp_timer_tid = TCP_TIMER((tcp), tcp_timer, (intvl)); \ 121 } 122 123 /* 124 * For scalability, we must not run a timer for every TCP connection 125 * in TIME_WAIT state. To see why, consider (for time wait interval of 126 * 1 minutes): 127 * 10,000 connections/sec * 60 seconds/time wait = 600,000 active conn's 128 * 129 * This list is ordered by time, so you need only delete from the head 130 * until you get to entries which aren't old enough to delete yet. 131 * The list consists of only the detached TIME_WAIT connections. 132 * 133 * When a tcp_t enters TIME_WAIT state, a timer is started (timeout is 134 * tcps_time_wait_interval). When the tcp_t is detached (upper layer closes 135 * the end point), it is moved to the time wait list and another timer is 136 * started (expiry time is set at tcp_time_wait_expire, which is 137 * also calculated using tcps_time_wait_interval). This means that the 138 * TIME_WAIT state can be extended (up to doubled) if the tcp_t doesn't 139 * become detached for a long time. 140 * 141 * The list manipulations (including tcp_time_wait_next/prev) 142 * are protected by the tcp_time_wait_lock. The content of the 143 * detached TIME_WAIT connections is protected by the normal perimeters. 144 * 145 * This list is per squeue and squeues are shared across the tcp_stack_t's. 146 * Things on tcp_time_wait_head remain associated with the tcp_stack_t 147 * and conn_netstack. 148 * The tcp_t's that are added to tcp_free_list are disassociated and 149 * have NULL tcp_tcps and conn_netstack pointers. 150 */ 151 typedef struct tcp_squeue_priv_s { 152 kmutex_t tcp_time_wait_lock; 153 callout_id_t tcp_time_wait_tid; 154 tcp_t *tcp_time_wait_head; 155 tcp_t *tcp_time_wait_tail; 156 tcp_t *tcp_free_list; 157 uint_t tcp_free_list_cnt; 158 #ifdef DEBUG 159 /* 160 * For debugging purpose, true when tcp_time_wait_collector() is 161 * running. 162 */ 163 boolean_t tcp_time_wait_running; 164 #endif 165 } tcp_squeue_priv_t; 166 167 /* 168 * Parameters for TCP Initial Send Sequence number (ISS) generation. When 169 * tcp_strong_iss is set to 1, which is the default, the ISS is calculated 170 * by adding three components: a time component which grows by 1 every 4096 171 * nanoseconds (versus every 4 microseconds suggested by RFC 793, page 27); 172 * a per-connection component which grows by 125000 for every new connection; 173 * and an "extra" component that grows by a random amount centered 174 * approximately on 64000. This causes the ISS generator to cycle every 175 * 4.89 hours if no TCP connections are made, and faster if connections are 176 * made. 177 * 178 * When tcp_strong_iss is set to 0, ISS is calculated by adding two 179 * components: a time component which grows by 250000 every second; and 180 * a per-connection component which grows by 125000 for every new connections. 181 * 182 * A third method, when tcp_strong_iss is set to 2, for generating ISS is 183 * prescribed by Steve Bellovin. This involves adding time, the 125000 per 184 * connection, and a one-way hash (MD5) of the connection ID <sport, dport, 185 * src, dst>, a "truly" random (per RFC 1750) number, and a console-entered 186 * password. 187 */ 188 #define ISS_INCR 250000 189 #define ISS_NSEC_SHT 12 190 191 /* Macros for timestamp comparisons */ 192 #define TSTMP_GEQ(a, b) ((int32_t)((a)-(b)) >= 0) 193 #define TSTMP_LT(a, b) ((int32_t)((a)-(b)) < 0) 194 195 /* 196 * Initialize cwnd according to RFC 3390. def_max_init_cwnd is 197 * either tcp_slow_start_initial or tcp_slow_start_after idle 198 * depending on the caller. If the upper layer has not used the 199 * TCP_INIT_CWND option to change the initial cwnd, tcp_init_cwnd 200 * should be 0 and we use the formula in RFC 3390 to set tcp_cwnd. 201 * If the upper layer has changed set the tcp_init_cwnd, just use 202 * it to calculate the tcp_cwnd. 203 * 204 * "An Argument for Increasing TCP's Initial Congestion Window" 205 * ACM SIGCOMM Computer Communications Review, vol. 40 (2010), pp. 27-33 206 * -- Nandita Dukkipati, Tiziana Refice, Yuchung Cheng, 207 * Hsiao-keng Jerry Chu, Tom Herbert, Amit Agarwal, 208 * Arvind Jain, Natalia Sutin 209 * 210 * "Based on the results from our experiments, we believe the 211 * initial congestion window should be at least ten segments 212 * and the same be investigated for standardization by the IETF." 213 * 214 * As such, the def_max_init_cwnd argument with which this macro is 215 * invoked is either the tcps_slow_start_initial or 216 * tcps_slow_start_after_idle which both default to 0 and will respect 217 * RFC 3390 exactly. If the tunables are explicitly set by the operator, 218 * then the initial congestion window should be set as the operator 219 * demands, within reason. We shall arbitrarily define reason as a 220 * maximum of 16 (same as used by the TCP_INIT_CWND setsockopt). 221 */ 222 223 /* Maximum TCP initial cwin (start/restart). */ 224 #define TCP_MAX_INIT_CWND 16 225 226 #define TCP_SET_INIT_CWND(tcp, mss, def_max_init_cwnd) \ 227 { \ 228 if ((tcp)->tcp_init_cwnd == 0) { \ 229 if (def_max_init_cwnd == 0) { \ 230 (tcp)->tcp_cwnd = MIN(4 * (mss), \ 231 MAX(2 * (mss), 4380 / (mss) * (mss))); \ 232 } else { \ 233 (tcp)->tcp_cwnd = MIN(TCP_MAX_INIT_CWND * (mss),\ 234 def_max_init_cwnd * (mss)); \ 235 } \ 236 } else { \ 237 (tcp)->tcp_cwnd = (tcp)->tcp_init_cwnd * (mss); \ 238 } \ 239 tcp->tcp_cwnd_cnt = 0; \ 240 } 241 242 /* 243 * Set ECN capable transport (ECT) code point in IP header. 244 * 245 * Note that there are 2 ECT code points '01' and '10', which are called 246 * ECT(1) and ECT(0) respectively. Here we follow the original ECT code 247 * point ECT(0) for TCP as described in RFC 2481. 248 */ 249 #define TCP_SET_ECT(tcp, iph) \ 250 if ((tcp)->tcp_connp->conn_ipversion == IPV4_VERSION) { \ 251 /* We need to clear the code point first. */ \ 252 ((ipha_t *)(iph))->ipha_type_of_service &= 0xFC; \ 253 ((ipha_t *)(iph))->ipha_type_of_service |= IPH_ECN_ECT0; \ 254 } else { \ 255 ((ip6_t *)(iph))->ip6_vcf &= htonl(0xFFCFFFFF); \ 256 ((ip6_t *)(iph))->ip6_vcf |= htonl(IPH_ECN_ECT0 << 20); \ 257 } 258 259 /* 260 * Set tcp_rto with boundary checking. 261 */ 262 #define TCP_SET_RTO(tcp, rto) \ 263 if ((rto) < (tcp)->tcp_rto_min) \ 264 (tcp)->tcp_rto = (tcp)->tcp_rto_min; \ 265 else if ((rto) > (tcp)->tcp_rto_max) \ 266 (tcp)->tcp_rto = (tcp)->tcp_rto_max; \ 267 else \ 268 (tcp)->tcp_rto = (rto); 269 270 /* 271 * TCP options struct returned from tcp_parse_options. 272 */ 273 typedef struct tcp_opt_s { 274 uint32_t tcp_opt_mss; 275 uint32_t tcp_opt_wscale; 276 uint32_t tcp_opt_ts_val; 277 uint32_t tcp_opt_ts_ecr; 278 tcp_t *tcp; 279 } tcp_opt_t; 280 281 /* 282 * Write-side flow-control is implemented via the per instance STREAMS 283 * write-side Q by explicitly setting QFULL to stop the flow of mblk_t(s) 284 * and clearing QFULL and calling qbackenable() to restart the flow based 285 * on the number of TCP unsent bytes (i.e. those not on the wire waiting 286 * for a remote ACK). 287 * 288 * This is different than a standard STREAMS kmod which when using the 289 * STREAMS Q the framework would automatictly flow-control based on the 290 * defined hiwat/lowat values as mblk_t's are enqueued/dequeued. 291 * 292 * As of FireEngine TCP write-side flow-control needs to take into account 293 * both the unsent tcp_xmit list bytes but also any squeue_t enqueued bytes 294 * (i.e. from tcp_wput() -> tcp_output()). 295 * 296 * This is accomplished by adding a new tcp_t fields, tcp_squeue_bytes, to 297 * count the number of bytes enqueued by tcp_wput() and the number of bytes 298 * dequeued and processed by tcp_output(). 299 * 300 * So, the total number of bytes unsent is (squeue_bytes + unsent) with all 301 * flow-control uses of unsent replaced with the macro TCP_UNSENT_BYTES. 302 */ 303 extern void tcp_clrqfull(tcp_t *); 304 extern void tcp_setqfull(tcp_t *); 305 306 #define TCP_UNSENT_BYTES(tcp) \ 307 ((tcp)->tcp_squeue_bytes + (tcp)->tcp_unsent) 308 309 /* 310 * Linked list struct to store listener connection limit configuration per 311 * IP stack. The list is stored at tcps_listener_conf in tcp_stack_t. 312 * 313 * tl_port: the listener port of this limit configuration 314 * tl_ratio: the maximum amount of memory consumed by all concurrent TCP 315 * connections created by a listener does not exceed 1/tl_ratio 316 * of the total system memory. Note that this is only an 317 * approximation. 318 * tl_link: linked list struct 319 */ 320 typedef struct tcp_listener_s { 321 in_port_t tl_port; 322 uint32_t tl_ratio; 323 list_node_t tl_link; 324 } tcp_listener_t; 325 326 /* 327 * If there is a limit set on the number of connections allowed per each 328 * listener, the following struct is used to store that counter. It keeps 329 * the number of TCP connection created by a listener. Note that this needs 330 * to be separated from the listener since the listener can go away before 331 * all the connections are gone. 332 * 333 * When the struct is allocated, tlc_cnt is set to 1. When a new connection 334 * is created by the listener, tlc_cnt is incremented by 1. When a connection 335 * created by the listener goes away, tlc_count is decremented by 1. When the 336 * listener itself goes away, tlc_cnt is decremented by one. The last 337 * connection (or the listener) which decrements tlc_cnt to zero frees the 338 * struct. 339 * 340 * tlc_max is the maximum number of concurrent TCP connections created from a 341 * listner. It is calculated when the tcp_listen_cnt_t is allocated. 342 * 343 * tlc_report_time stores the time when cmn_err() is called to report that the 344 * max has been exceeeded. Report is done at most once every 345 * TCP_TLC_REPORT_INTERVAL mins for a listener. 346 * 347 * tlc_drop stores the number of connection attempt dropped because the 348 * limit has reached. 349 */ 350 typedef struct tcp_listen_cnt_s { 351 uint32_t tlc_max; 352 uint32_t tlc_cnt; 353 int64_t tlc_report_time; 354 uint32_t tlc_drop; 355 } tcp_listen_cnt_t; 356 357 #define TCP_TLC_REPORT_INTERVAL (30 * MINUTES) 358 359 #define TCP_DECR_LISTEN_CNT(tcp) \ 360 { \ 361 ASSERT((tcp)->tcp_listen_cnt->tlc_cnt > 0); \ 362 if (atomic_add_32_nv(&(tcp)->tcp_listen_cnt->tlc_cnt, -1) == 0) \ 363 kmem_free((tcp)->tcp_listen_cnt, sizeof (tcp_listen_cnt_t)); \ 364 (tcp)->tcp_listen_cnt = NULL; \ 365 } 366 367 /* Increment and decrement the number of connections in tcp_stack_t. */ 368 #define TCPS_CONN_INC(tcps) \ 369 atomic_inc_64( \ 370 (uint64_t *)&(tcps)->tcps_sc[CPU->cpu_seqid]->tcp_sc_conn_cnt) 371 372 #define TCPS_CONN_DEC(tcps) \ 373 atomic_dec_64( \ 374 (uint64_t *)&(tcps)->tcps_sc[CPU->cpu_seqid]->tcp_sc_conn_cnt) 375 376 /* 377 * When the system is under memory pressure, stack variable tcps_reclaim is 378 * true, we shorten the connection timeout abort interval to tcp_early_abort 379 * seconds. Defined in tcp.c. 380 */ 381 extern uint32_t tcp_early_abort; 382 383 /* 384 * To reach to an eager in Q0 which can be dropped due to an incoming 385 * new SYN request when Q0 is full, a new doubly linked list is 386 * introduced. This list allows to select an eager from Q0 in O(1) time. 387 * This is needed to avoid spending too much time walking through the 388 * long list of eagers in Q0 when tcp_drop_q0() is called. Each member of 389 * this new list has to be a member of Q0. 390 * This list is headed by listener's tcp_t. When the list is empty, 391 * both the pointers - tcp_eager_next_drop_q0 and tcp_eager_prev_drop_q0, 392 * of listener's tcp_t point to listener's tcp_t itself. 393 * 394 * Given an eager in Q0 and a listener, MAKE_DROPPABLE() puts the eager 395 * in the list. MAKE_UNDROPPABLE() takes the eager out of the list. 396 * These macros do not affect the eager's membership to Q0. 397 */ 398 #define MAKE_DROPPABLE(listener, eager) \ 399 if ((eager)->tcp_eager_next_drop_q0 == NULL) { \ 400 (listener)->tcp_eager_next_drop_q0->tcp_eager_prev_drop_q0\ 401 = (eager); \ 402 (eager)->tcp_eager_prev_drop_q0 = (listener); \ 403 (eager)->tcp_eager_next_drop_q0 = \ 404 (listener)->tcp_eager_next_drop_q0; \ 405 (listener)->tcp_eager_next_drop_q0 = (eager); \ 406 } 407 408 #define MAKE_UNDROPPABLE(eager) \ 409 if ((eager)->tcp_eager_next_drop_q0 != NULL) { \ 410 (eager)->tcp_eager_next_drop_q0->tcp_eager_prev_drop_q0 \ 411 = (eager)->tcp_eager_prev_drop_q0; \ 412 (eager)->tcp_eager_prev_drop_q0->tcp_eager_next_drop_q0 \ 413 = (eager)->tcp_eager_next_drop_q0; \ 414 (eager)->tcp_eager_prev_drop_q0 = NULL; \ 415 (eager)->tcp_eager_next_drop_q0 = NULL; \ 416 } 417 418 /* 419 * The format argument to pass to tcp_display(). 420 * DISP_PORT_ONLY means that the returned string has only port info. 421 * DISP_ADDR_AND_PORT means that the returned string also contains the 422 * remote and local IP address. 423 */ 424 #define DISP_PORT_ONLY 1 425 #define DISP_ADDR_AND_PORT 2 426 427 #define IP_ADDR_CACHE_SIZE 2048 428 #define IP_ADDR_CACHE_HASH(faddr) \ 429 (ntohl(faddr) & (IP_ADDR_CACHE_SIZE -1)) 430 431 /* TCP cwnd burst factor. */ 432 #define TCP_CWND_INFINITE 65535 433 #define TCP_CWND_SS 3 434 #define TCP_CWND_NORMAL 5 435 436 /* 437 * TCP reassembly macros. We hide starting and ending sequence numbers in 438 * b_next and b_prev of messages on the reassembly queue. The messages are 439 * chained using b_cont. These macros are used in tcp_reass() so we don't 440 * have to see the ugly casts and assignments. 441 */ 442 #define TCP_REASS_SEQ(mp) ((uint32_t)(uintptr_t)((mp)->b_next)) 443 #define TCP_REASS_SET_SEQ(mp, u) ((mp)->b_next = \ 444 (mblk_t *)(uintptr_t)(u)) 445 #define TCP_REASS_END(mp) ((uint32_t)(uintptr_t)((mp)->b_prev)) 446 #define TCP_REASS_SET_END(mp, u) ((mp)->b_prev = \ 447 (mblk_t *)(uintptr_t)(u)) 448 449 #define tcps_time_wait_interval tcps_propinfo_tbl[0].prop_cur_uval 450 #define tcps_conn_req_max_q tcps_propinfo_tbl[1].prop_cur_uval 451 #define tcps_conn_req_max_q0 tcps_propinfo_tbl[2].prop_cur_uval 452 #define tcps_conn_req_min tcps_propinfo_tbl[3].prop_cur_uval 453 #define tcps_conn_grace_period tcps_propinfo_tbl[4].prop_cur_uval 454 #define tcps_cwnd_max_ tcps_propinfo_tbl[5].prop_cur_uval 455 #define tcps_dbg tcps_propinfo_tbl[6].prop_cur_uval 456 #define tcps_smallest_nonpriv_port tcps_propinfo_tbl[7].prop_cur_uval 457 #define tcps_ip_abort_cinterval tcps_propinfo_tbl[8].prop_cur_uval 458 #define tcps_ip_abort_linterval tcps_propinfo_tbl[9].prop_cur_uval 459 #define tcps_ip_abort_interval tcps_propinfo_tbl[10].prop_cur_uval 460 #define tcps_ip_notify_cinterval tcps_propinfo_tbl[11].prop_cur_uval 461 #define tcps_ip_notify_interval tcps_propinfo_tbl[12].prop_cur_uval 462 #define tcps_ipv4_ttl tcps_propinfo_tbl[13].prop_cur_uval 463 #define tcps_keepalive_interval_high tcps_propinfo_tbl[14].prop_max_uval 464 #define tcps_keepalive_interval tcps_propinfo_tbl[14].prop_cur_uval 465 #define tcps_keepalive_interval_low tcps_propinfo_tbl[14].prop_min_uval 466 #define tcps_maxpsz_multiplier tcps_propinfo_tbl[15].prop_cur_uval 467 #define tcps_mss_def_ipv4 tcps_propinfo_tbl[16].prop_cur_uval 468 #define tcps_mss_max_ipv4 tcps_propinfo_tbl[17].prop_cur_uval 469 #define tcps_mss_min tcps_propinfo_tbl[18].prop_cur_uval 470 #define tcps_naglim_def tcps_propinfo_tbl[19].prop_cur_uval 471 #define tcps_rexmit_interval_initial_high \ 472 tcps_propinfo_tbl[20].prop_max_uval 473 #define tcps_rexmit_interval_initial tcps_propinfo_tbl[20].prop_cur_uval 474 #define tcps_rexmit_interval_initial_low \ 475 tcps_propinfo_tbl[20].prop_min_uval 476 #define tcps_rexmit_interval_max_high tcps_propinfo_tbl[21].prop_max_uval 477 #define tcps_rexmit_interval_max tcps_propinfo_tbl[21].prop_cur_uval 478 #define tcps_rexmit_interval_max_low tcps_propinfo_tbl[21].prop_min_uval 479 #define tcps_rexmit_interval_min_high tcps_propinfo_tbl[22].prop_max_uval 480 #define tcps_rexmit_interval_min tcps_propinfo_tbl[22].prop_cur_uval 481 #define tcps_rexmit_interval_min_low tcps_propinfo_tbl[22].prop_min_uval 482 #define tcps_deferred_ack_interval tcps_propinfo_tbl[23].prop_cur_uval 483 #define tcps_snd_lowat_fraction tcps_propinfo_tbl[24].prop_cur_uval 484 #define tcps_dupack_fast_retransmit tcps_propinfo_tbl[25].prop_cur_uval 485 #define tcps_ignore_path_mtu tcps_propinfo_tbl[26].prop_cur_bval 486 #define tcps_smallest_anon_port tcps_propinfo_tbl[27].prop_cur_uval 487 #define tcps_largest_anon_port tcps_propinfo_tbl[28].prop_cur_uval 488 #define tcps_xmit_hiwat tcps_propinfo_tbl[29].prop_cur_uval 489 #define tcps_xmit_lowat tcps_propinfo_tbl[30].prop_cur_uval 490 #define tcps_recv_hiwat tcps_propinfo_tbl[31].prop_cur_uval 491 #define tcps_recv_hiwat_minmss tcps_propinfo_tbl[32].prop_cur_uval 492 #define tcps_fin_wait_2_flush_interval_high \ 493 tcps_propinfo_tbl[33].prop_max_uval 494 #define tcps_fin_wait_2_flush_interval tcps_propinfo_tbl[33].prop_cur_uval 495 #define tcps_fin_wait_2_flush_interval_low \ 496 tcps_propinfo_tbl[33].prop_min_uval 497 #define tcps_max_buf tcps_propinfo_tbl[34].prop_cur_uval 498 #define tcps_strong_iss tcps_propinfo_tbl[35].prop_cur_uval 499 #define tcps_rtt_updates tcps_propinfo_tbl[36].prop_cur_uval 500 #define tcps_wscale_always tcps_propinfo_tbl[37].prop_cur_bval 501 #define tcps_tstamp_always tcps_propinfo_tbl[38].prop_cur_bval 502 #define tcps_tstamp_if_wscale tcps_propinfo_tbl[39].prop_cur_bval 503 #define tcps_rexmit_interval_extra tcps_propinfo_tbl[40].prop_cur_uval 504 #define tcps_deferred_acks_max tcps_propinfo_tbl[41].prop_cur_uval 505 #define tcps_slow_start_after_idle tcps_propinfo_tbl[42].prop_cur_uval 506 #define tcps_slow_start_initial tcps_propinfo_tbl[43].prop_cur_uval 507 #define tcps_sack_permitted tcps_propinfo_tbl[44].prop_cur_uval 508 #define tcps_ipv6_hoplimit tcps_propinfo_tbl[45].prop_cur_uval 509 #define tcps_mss_def_ipv6 tcps_propinfo_tbl[46].prop_cur_uval 510 #define tcps_mss_max_ipv6 tcps_propinfo_tbl[47].prop_cur_uval 511 #define tcps_rev_src_routes tcps_propinfo_tbl[48].prop_cur_bval 512 #define tcps_local_dack_interval tcps_propinfo_tbl[49].prop_cur_uval 513 #define tcps_local_dacks_max tcps_propinfo_tbl[50].prop_cur_uval 514 #define tcps_ecn_permitted tcps_propinfo_tbl[51].prop_cur_uval 515 #define tcps_rst_sent_rate_enabled tcps_propinfo_tbl[52].prop_cur_bval 516 #define tcps_rst_sent_rate tcps_propinfo_tbl[53].prop_cur_uval 517 #define tcps_push_timer_interval tcps_propinfo_tbl[54].prop_cur_uval 518 #define tcps_use_smss_as_mss_opt tcps_propinfo_tbl[55].prop_cur_bval 519 #define tcps_keepalive_abort_interval_high \ 520 tcps_propinfo_tbl[56].prop_max_uval 521 #define tcps_keepalive_abort_interval \ 522 tcps_propinfo_tbl[56].prop_cur_uval 523 #define tcps_keepalive_abort_interval_low \ 524 tcps_propinfo_tbl[56].prop_min_uval 525 #define tcps_wroff_xtra tcps_propinfo_tbl[57].prop_cur_uval 526 #define tcps_dev_flow_ctl tcps_propinfo_tbl[58].prop_cur_bval 527 #define tcps_reass_timeout tcps_propinfo_tbl[59].prop_cur_uval 528 #define tcps_iss_incr tcps_propinfo_tbl[65].prop_cur_uval 529 530 extern struct qinit tcp_rinitv4, tcp_rinitv6; 531 extern boolean_t do_tcp_fusion; 532 533 /* 534 * Object to represent database of options to search passed to 535 * {sock,tpi}optcom_req() interface routine to take care of option 536 * management and associated methods. 537 */ 538 extern optdb_obj_t tcp_opt_obj; 539 extern uint_t tcp_max_optsize; 540 541 extern int tcp_squeue_flag; 542 543 extern uint_t tcp_free_list_max_cnt; 544 545 /* 546 * Functions in tcp.c. 547 */ 548 extern void tcp_acceptor_hash_insert(t_uscalar_t, tcp_t *); 549 extern tcp_t *tcp_acceptor_hash_lookup(t_uscalar_t, tcp_stack_t *); 550 extern void tcp_acceptor_hash_remove(tcp_t *); 551 extern mblk_t *tcp_ack_mp(tcp_t *); 552 extern int tcp_build_hdrs(tcp_t *); 553 extern void tcp_cleanup(tcp_t *); 554 extern int tcp_clean_death(tcp_t *, int); 555 extern void tcp_clean_death_wrapper(void *, mblk_t *, void *, 556 ip_recv_attr_t *); 557 extern void tcp_close_common(conn_t *, int); 558 extern void tcp_close_detached(tcp_t *); 559 extern void tcp_close_mpp(mblk_t **); 560 extern void tcp_closei_local(tcp_t *); 561 extern sock_lower_handle_t tcp_create(int, int, int, sock_downcalls_t **, 562 uint_t *, int *, int, cred_t *); 563 extern conn_t *tcp_create_common(cred_t *, boolean_t, boolean_t, int *); 564 extern void tcp_disconnect(tcp_t *, mblk_t *); 565 extern char *tcp_display(tcp_t *, char *, char); 566 extern int tcp_do_bind(conn_t *, struct sockaddr *, socklen_t, cred_t *, 567 boolean_t); 568 extern int tcp_do_connect(conn_t *, const struct sockaddr *, socklen_t, 569 cred_t *, pid_t); 570 extern int tcp_do_listen(conn_t *, struct sockaddr *, socklen_t, int, 571 cred_t *, boolean_t); 572 extern int tcp_do_unbind(conn_t *); 573 extern boolean_t tcp_eager_blowoff(tcp_t *, t_scalar_t); 574 extern void tcp_eager_cleanup(tcp_t *, boolean_t); 575 extern void tcp_eager_kill(void *, mblk_t *, void *, ip_recv_attr_t *); 576 extern void tcp_eager_unlink(tcp_t *); 577 extern void tcp_init_values(tcp_t *, tcp_t *); 578 extern void tcp_ipsec_cleanup(tcp_t *); 579 extern int tcp_maxpsz_set(tcp_t *, boolean_t); 580 extern void tcp_mss_set(tcp_t *, uint32_t); 581 extern void tcp_reinput(conn_t *, mblk_t *, ip_recv_attr_t *, ip_stack_t *); 582 extern void tcp_rsrv(queue_t *); 583 extern uint_t tcp_rwnd_reopen(tcp_t *); 584 extern int tcp_rwnd_set(tcp_t *, uint32_t); 585 extern int tcp_set_destination(tcp_t *); 586 extern void tcp_set_ws_value(tcp_t *); 587 extern void tcp_stop_lingering(tcp_t *); 588 extern void tcp_update_pmtu(tcp_t *, boolean_t); 589 extern mblk_t *tcp_zcopy_backoff(tcp_t *, mblk_t *, boolean_t); 590 extern boolean_t tcp_zcopy_check(tcp_t *); 591 extern void tcp_zcopy_notify(tcp_t *); 592 extern void tcp_get_proto_props(tcp_t *, struct sock_proto_props *); 593 594 /* 595 * Bind related functions in tcp_bind.c 596 */ 597 extern int tcp_bind_check(conn_t *, struct sockaddr *, socklen_t, 598 cred_t *, boolean_t); 599 extern void tcp_bind_hash_insert(tf_t *, tcp_t *, int); 600 extern void tcp_bind_hash_remove(tcp_t *); 601 extern in_port_t tcp_bindi(tcp_t *, in_port_t, const in6_addr_t *, 602 int, boolean_t, boolean_t, boolean_t); 603 extern in_port_t tcp_update_next_port(in_port_t, const tcp_t *, 604 boolean_t); 605 606 /* 607 * Fusion related functions in tcp_fusion.c. 608 */ 609 extern void tcp_fuse(tcp_t *, uchar_t *, tcpha_t *); 610 extern void tcp_unfuse(tcp_t *); 611 extern boolean_t tcp_fuse_output(tcp_t *, mblk_t *, uint32_t); 612 extern void tcp_fuse_output_urg(tcp_t *, mblk_t *); 613 extern boolean_t tcp_fuse_rcv_drain(queue_t *, tcp_t *, mblk_t **); 614 extern size_t tcp_fuse_set_rcv_hiwat(tcp_t *, size_t); 615 extern int tcp_fuse_maxpsz(tcp_t *); 616 extern void tcp_fuse_backenable(tcp_t *); 617 extern void tcp_iss_key_init(uint8_t *, int, tcp_stack_t *); 618 619 /* 620 * Output related functions in tcp_output.c. 621 */ 622 extern void tcp_close_output(void *, mblk_t *, void *, ip_recv_attr_t *); 623 extern void tcp_output(void *, mblk_t *, void *, ip_recv_attr_t *); 624 extern void tcp_output_urgent(void *, mblk_t *, void *, ip_recv_attr_t *); 625 extern void tcp_rexmit_after_error(tcp_t *); 626 extern void tcp_sack_rexmit(tcp_t *, uint_t *); 627 extern void tcp_send_data(tcp_t *, mblk_t *); 628 extern void tcp_send_synack(void *, mblk_t *, void *, ip_recv_attr_t *); 629 extern void tcp_shutdown_output(void *, mblk_t *, void *, ip_recv_attr_t *); 630 extern void tcp_ss_rexmit(tcp_t *); 631 extern void tcp_update_xmit_tail(tcp_t *, uint32_t); 632 extern void tcp_wput(queue_t *, mblk_t *); 633 extern void tcp_wput_data(tcp_t *, mblk_t *, boolean_t); 634 extern void tcp_wput_sock(queue_t *, mblk_t *); 635 extern void tcp_wput_fallback(queue_t *, mblk_t *); 636 extern void tcp_xmit_ctl(char *, tcp_t *, uint32_t, uint32_t, int); 637 extern void tcp_xmit_listeners_reset(mblk_t *, ip_recv_attr_t *, 638 ip_stack_t *i, conn_t *); 639 extern mblk_t *tcp_xmit_mp(tcp_t *, mblk_t *, int32_t, int32_t *, 640 mblk_t **, uint32_t, boolean_t, uint32_t *, boolean_t); 641 642 /* 643 * Input related functions in tcp_input.c. 644 */ 645 extern void tcp_icmp_input(void *, mblk_t *, void *, ip_recv_attr_t *); 646 extern void tcp_input_data(void *, mblk_t *, void *, ip_recv_attr_t *); 647 extern void tcp_input_listener_unbound(void *, mblk_t *, void *, 648 ip_recv_attr_t *); 649 extern boolean_t tcp_paws_check(tcp_t *, tcpha_t *, tcp_opt_t *); 650 extern uint_t tcp_rcv_drain(tcp_t *); 651 extern void tcp_rcv_enqueue(tcp_t *, mblk_t *, uint_t, cred_t *); 652 extern boolean_t tcp_verifyicmp(conn_t *, void *, icmph_t *, icmp6_t *, 653 ip_recv_attr_t *); 654 655 /* 656 * Kernel socket related functions in tcp_socket.c. 657 */ 658 extern int tcp_fallback(sock_lower_handle_t, queue_t *, boolean_t, 659 so_proto_quiesced_cb_t, sock_quiesce_arg_t *); 660 extern boolean_t tcp_newconn_notify(tcp_t *, ip_recv_attr_t *); 661 662 /* 663 * Timer related functions in tcp_timers.c. 664 */ 665 extern void tcp_ack_timer(void *); 666 extern void tcp_close_linger_timeout(void *); 667 extern void tcp_keepalive_timer(void *); 668 extern void tcp_push_timer(void *); 669 extern void tcp_reass_timer(void *); 670 extern mblk_t *tcp_timermp_alloc(int); 671 extern void tcp_timermp_free(tcp_t *); 672 extern timeout_id_t tcp_timeout(conn_t *, void (*)(void *), hrtime_t); 673 extern clock_t tcp_timeout_cancel(conn_t *, timeout_id_t); 674 extern void tcp_timer(void *arg); 675 extern void tcp_timers_stop(tcp_t *); 676 677 /* 678 * TCP TPI related functions in tcp_tpi.c. 679 */ 680 extern void tcp_addr_req(tcp_t *, mblk_t *); 681 extern void tcp_capability_req(tcp_t *, mblk_t *); 682 extern boolean_t tcp_conn_con(tcp_t *, uchar_t *, mblk_t *, 683 mblk_t **, ip_recv_attr_t *); 684 extern void tcp_err_ack(tcp_t *, mblk_t *, int, int); 685 extern void tcp_err_ack_prim(tcp_t *, mblk_t *, int, int, int); 686 extern void tcp_info_req(tcp_t *, mblk_t *); 687 extern void tcp_send_conn_ind(void *, mblk_t *, void *); 688 extern void tcp_send_pending(void *, mblk_t *, void *, ip_recv_attr_t *); 689 extern void tcp_tpi_accept(queue_t *, mblk_t *); 690 extern void tcp_tpi_bind(tcp_t *, mblk_t *); 691 extern int tcp_tpi_close(queue_t *, int); 692 extern int tcp_tpi_close_accept(queue_t *); 693 extern void tcp_tpi_connect(tcp_t *, mblk_t *); 694 extern int tcp_tpi_opt_get(queue_t *, t_scalar_t, t_scalar_t, uchar_t *); 695 extern int tcp_tpi_opt_set(queue_t *, uint_t, int, int, uint_t, uchar_t *, 696 uint_t *, uchar_t *, void *, cred_t *); 697 extern void tcp_tpi_unbind(tcp_t *, mblk_t *); 698 extern void tcp_tli_accept(tcp_t *, mblk_t *); 699 extern void tcp_use_pure_tpi(tcp_t *); 700 extern void tcp_do_capability_ack(tcp_t *, struct T_capability_ack *, 701 t_uscalar_t); 702 703 /* 704 * TCP option processing related functions in tcp_opt_data.c 705 */ 706 extern int tcp_opt_get(conn_t *, int, int, uchar_t *); 707 extern int tcp_opt_set(conn_t *, uint_t, int, int, uint_t, uchar_t *, 708 uint_t *, uchar_t *, void *, cred_t *); 709 710 /* 711 * TCP time wait processing related functions in tcp_time_wait.c. 712 */ 713 extern void tcp_time_wait_append(tcp_t *); 714 extern void tcp_time_wait_collector(void *); 715 extern boolean_t tcp_time_wait_remove(tcp_t *, tcp_squeue_priv_t *); 716 extern void tcp_time_wait_processing(tcp_t *, mblk_t *, uint32_t, 717 uint32_t, int, tcpha_t *, ip_recv_attr_t *); 718 719 /* 720 * Misc functions in tcp_misc.c. 721 */ 722 extern uint32_t tcp_find_listener_conf(tcp_stack_t *, in_port_t); 723 extern void tcp_ioctl_abort_conn(queue_t *, mblk_t *); 724 extern void tcp_listener_conf_cleanup(tcp_stack_t *); 725 extern void tcp_stack_cpu_add(tcp_stack_t *, processorid_t); 726 727 #endif /* _KERNEL */ 728 729 #ifdef __cplusplus 730 } 731 #endif 732 733 #endif /* _INET_TCP_IMPL_H */ 734