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 * Copyright (c) 2013 by Delphix. All rights reserved. 26 */ 27 28 #ifndef _INET_TCP_IMPL_H 29 #define _INET_TCP_IMPL_H 30 31 /* 32 * TCP implementation private declarations. These interfaces are 33 * used to build the IP module and are not meant to be accessed 34 * by any modules except IP itself. They are undocumented and are 35 * subject to change without notice. 36 */ 37 38 #ifdef __cplusplus 39 extern "C" { 40 #endif 41 42 #ifdef _KERNEL 43 44 #include <sys/cpuvar.h> 45 #include <sys/clock_impl.h> /* For LBOLT_FASTPATH{,64} */ 46 #include <inet/optcom.h> 47 #include <inet/tcp.h> 48 #include <inet/tunables.h> 49 50 #define TCP_MOD_ID 5105 51 52 extern struct qinit tcp_sock_winit; 53 extern struct qinit tcp_winit; 54 55 extern sock_downcalls_t sock_tcp_downcalls; 56 57 /* 58 * Note that by default, the _snd_lowat_fraction tunable controls the value of 59 * the transmit low water mark. TCP_XMIT_LOWATER (and thus the _xmit_lowat 60 * property) is only used if the administrator has disabled _snd_lowat_fraction 61 * by setting it to 0. 62 */ 63 #define TCP_XMIT_LOWATER 4096 64 #define TCP_XMIT_HIWATER 49152 65 #define TCP_RECV_LOWATER 2048 66 #define TCP_RECV_HIWATER 128000 67 68 /* 69 * Bind hash list size and has function. It has to be a power of 2 for 70 * hashing. 71 */ 72 #define TCP_BIND_FANOUT_SIZE 1024 73 #define TCP_BIND_HASH(lport) (ntohs(lport) & (TCP_BIND_FANOUT_SIZE - 1)) 74 75 /* 76 * This implementation follows the 4.3BSD interpretation of the urgent 77 * pointer and not RFC 1122. Switching to RFC 1122 behavior would cause 78 * incompatible changes in protocols like telnet and rlogin. 79 */ 80 #define TCP_OLD_URP_INTERPRETATION 1 81 82 /* TCP option length */ 83 #define TCPOPT_NOP_LEN 1 84 #define TCPOPT_MAXSEG_LEN 4 85 #define TCPOPT_WS_LEN 3 86 #define TCPOPT_REAL_WS_LEN (TCPOPT_WS_LEN+1) 87 #define TCPOPT_TSTAMP_LEN 10 88 #define TCPOPT_REAL_TS_LEN (TCPOPT_TSTAMP_LEN+2) 89 #define TCPOPT_SACK_OK_LEN 2 90 #define TCPOPT_REAL_SACK_OK_LEN (TCPOPT_SACK_OK_LEN+2) 91 #define TCPOPT_REAL_SACK_LEN 4 92 #define TCPOPT_MAX_SACK_LEN 36 93 #define TCPOPT_HEADER_LEN 2 94 95 /* Round up the value to the nearest mss. */ 96 #define MSS_ROUNDUP(value, mss) ((((value) - 1) / (mss) + 1) * (mss)) 97 98 /* 99 * Was this tcp created via socket() interface? 100 */ 101 #define TCP_IS_SOCKET(tcp) ((tcp)->tcp_issocket) 102 103 /* 104 * Is this tcp not attached to any upper client? 105 */ 106 #define TCP_IS_DETACHED(tcp) ((tcp)->tcp_detached) 107 108 /* TCP timers related data strucutres. Refer to tcp_timers.c. */ 109 typedef struct tcp_timer_s { 110 conn_t *connp; 111 void (*tcpt_proc)(void *); 112 callout_id_t tcpt_tid; 113 } tcp_timer_t; 114 115 extern kmem_cache_t *tcp_timercache; 116 117 /* 118 * Macro for starting various timers. Retransmission timer has its own macro, 119 * TCP_TIMER_RESTART(). tim is in millisec. 120 */ 121 #define TCP_TIMER(tcp, f, tim) \ 122 tcp_timeout(tcp->tcp_connp, f, tim) 123 #define TCP_TIMER_CANCEL(tcp, id) \ 124 tcp_timeout_cancel(tcp->tcp_connp, id) 125 126 /* 127 * To restart the TCP retransmission timer. intvl is in millisec. 128 */ 129 #define TCP_TIMER_RESTART(tcp, intvl) { \ 130 if ((tcp)->tcp_timer_tid != 0) \ 131 (void) TCP_TIMER_CANCEL((tcp), (tcp)->tcp_timer_tid); \ 132 (tcp)->tcp_timer_tid = TCP_TIMER((tcp), tcp_timer, (intvl)); \ 133 } 134 135 /* 136 * For scalability, we must not run a timer for every TCP connection 137 * in TIME_WAIT state. To see why, consider (for time wait interval of 138 * 1 minutes): 139 * 10,000 connections/sec * 60 seconds/time wait = 600,000 active conn's 140 * 141 * This list is ordered by time, so you need only delete from the head 142 * until you get to entries which aren't old enough to delete yet. 143 * The list consists of only the detached TIME_WAIT connections. 144 * 145 * When a tcp_t enters TIME_WAIT state, a timer is started (timeout is 146 * tcps_time_wait_interval). When the tcp_t is detached (upper layer closes 147 * the end point), it is moved to the time wait list and another timer is 148 * started (expiry time is set at tcp_time_wait_expire, which is 149 * also calculated using tcps_time_wait_interval). This means that the 150 * TIME_WAIT state can be extended (up to doubled) if the tcp_t doesn't 151 * become detached for a long time. 152 * 153 * The list manipulations (including tcp_time_wait_next/prev) 154 * are protected by the tcp_time_wait_lock. The content of the 155 * detached TIME_WAIT connections is protected by the normal perimeters. 156 * 157 * This list is per squeue and squeues are shared across the tcp_stack_t's. 158 * Things on tcp_time_wait_head remain associated with the tcp_stack_t 159 * and conn_netstack. 160 * The tcp_t's that are added to tcp_free_list are disassociated and 161 * have NULL tcp_tcps and conn_netstack pointers. 162 */ 163 typedef struct tcp_squeue_priv_s { 164 kmutex_t tcp_time_wait_lock; 165 callout_id_t tcp_time_wait_tid; 166 tcp_t *tcp_time_wait_head; 167 tcp_t *tcp_time_wait_tail; 168 tcp_t *tcp_free_list; 169 uint_t tcp_free_list_cnt; 170 #ifdef DEBUG 171 /* 172 * For debugging purpose, true when tcp_time_wait_collector() is 173 * running. 174 */ 175 boolean_t tcp_time_wait_running; 176 #endif 177 } tcp_squeue_priv_t; 178 179 /* 180 * Parameters for TCP Initial Send Sequence number (ISS) generation. When 181 * tcp_strong_iss is set to 1, which is the default, the ISS is calculated 182 * by adding three components: a time component which grows by 1 every 4096 183 * nanoseconds (versus every 4 microseconds suggested by RFC 793, page 27); 184 * a per-connection component which grows by 125000 for every new connection; 185 * and an "extra" component that grows by a random amount centered 186 * approximately on 64000. This causes the ISS generator to cycle every 187 * 4.89 hours if no TCP connections are made, and faster if connections are 188 * made. 189 * 190 * When tcp_strong_iss is set to 0, ISS is calculated by adding two 191 * components: a time component which grows by 250000 every second; and 192 * a per-connection component which grows by 125000 for every new connections. 193 * 194 * A third method, when tcp_strong_iss is set to 2, for generating ISS is 195 * prescribed by Steve Bellovin. This involves adding time, the 125000 per 196 * connection, and a one-way hash (MD5) of the connection ID <sport, dport, 197 * src, dst>, a "truly" random (per RFC 1750) number, and a console-entered 198 * password. 199 */ 200 #define ISS_INCR 250000 201 #define ISS_NSEC_SHT 12 202 203 /* Macros for timestamp comparisons */ 204 #define TSTMP_GEQ(a, b) ((int32_t)((a)-(b)) >= 0) 205 #define TSTMP_LT(a, b) ((int32_t)((a)-(b)) < 0) 206 207 /* 208 * Initialize cwnd according to RFC 3390. def_max_init_cwnd is 209 * either tcp_slow_start_initial or tcp_slow_start_after idle 210 * depending on the caller. If the upper layer has not used the 211 * TCP_INIT_CWND option to change the initial cwnd, tcp_init_cwnd 212 * should be 0 and we use the formula in RFC 3390 to set tcp_cwnd. 213 * If the upper layer has changed set the tcp_init_cwnd, just use 214 * it to calculate the tcp_cwnd. 215 * 216 * "An Argument for Increasing TCP's Initial Congestion Window" 217 * ACM SIGCOMM Computer Communications Review, vol. 40 (2010), pp. 27-33 218 * -- Nandita Dukkipati, Tiziana Refice, Yuchung Cheng, 219 * Hsiao-keng Jerry Chu, Tom Herbert, Amit Agarwal, 220 * Arvind Jain, Natalia Sutin 221 * 222 * "Based on the results from our experiments, we believe the 223 * initial congestion window should be at least ten segments 224 * and the same be investigated for standardization by the IETF." 225 * 226 * As such, the def_max_init_cwnd argument with which this macro is 227 * invoked is either the tcps_slow_start_initial or 228 * tcps_slow_start_after_idle which both default to 0 and will respect 229 * RFC 3390 exactly. If the tunables are explicitly set by the operator, 230 * then the initial congestion window should be set as the operator 231 * demands, within reason. We shall arbitrarily define reason as a 232 * maximum of 16 (same as used by the TCP_INIT_CWND setsockopt). 233 */ 234 235 /* Maximum TCP initial cwin (start/restart). */ 236 #define TCP_MAX_INIT_CWND 16 237 238 #define TCP_SET_INIT_CWND(tcp, mss, def_max_init_cwnd) \ 239 { \ 240 if ((tcp)->tcp_init_cwnd == 0) { \ 241 if (def_max_init_cwnd == 0) { \ 242 (tcp)->tcp_cwnd = MIN(4 * (mss), \ 243 MAX(2 * (mss), 4380 / (mss) * (mss))); \ 244 } else { \ 245 (tcp)->tcp_cwnd = MIN(TCP_MAX_INIT_CWND * (mss),\ 246 def_max_init_cwnd * (mss)); \ 247 } \ 248 } else { \ 249 (tcp)->tcp_cwnd = (tcp)->tcp_init_cwnd * (mss); \ 250 } \ 251 tcp->tcp_cwnd_cnt = 0; \ 252 } 253 254 /* 255 * Set ECN capable transport (ECT) code point in IP header. 256 * 257 * Note that there are 2 ECT code points '01' and '10', which are called 258 * ECT(1) and ECT(0) respectively. Here we follow the original ECT code 259 * point ECT(0) for TCP as described in RFC 2481. 260 */ 261 #define TCP_SET_ECT(tcp, iph) \ 262 if ((tcp)->tcp_connp->conn_ipversion == IPV4_VERSION) { \ 263 /* We need to clear the code point first. */ \ 264 ((ipha_t *)(iph))->ipha_type_of_service &= 0xFC; \ 265 ((ipha_t *)(iph))->ipha_type_of_service |= IPH_ECN_ECT0; \ 266 } else { \ 267 ((ip6_t *)(iph))->ip6_vcf &= htonl(0xFFCFFFFF); \ 268 ((ip6_t *)(iph))->ip6_vcf |= htonl(IPH_ECN_ECT0 << 20); \ 269 } 270 271 /* 272 * Set tcp_rto with boundary checking. 273 */ 274 #define TCP_SET_RTO(tcp, rto) \ 275 if ((rto) < (tcp)->tcp_rto_min) \ 276 (tcp)->tcp_rto = (tcp)->tcp_rto_min; \ 277 else if ((rto) > (tcp)->tcp_rto_max) \ 278 (tcp)->tcp_rto = (tcp)->tcp_rto_max; \ 279 else \ 280 (tcp)->tcp_rto = (rto); 281 282 /* 283 * TCP options struct returned from tcp_parse_options. 284 */ 285 typedef struct tcp_opt_s { 286 uint32_t tcp_opt_mss; 287 uint32_t tcp_opt_wscale; 288 uint32_t tcp_opt_ts_val; 289 uint32_t tcp_opt_ts_ecr; 290 tcp_t *tcp; 291 } tcp_opt_t; 292 293 /* 294 * Write-side flow-control is implemented via the per instance STREAMS 295 * write-side Q by explicitly setting QFULL to stop the flow of mblk_t(s) 296 * and clearing QFULL and calling qbackenable() to restart the flow based 297 * on the number of TCP unsent bytes (i.e. those not on the wire waiting 298 * for a remote ACK). 299 * 300 * This is different than a standard STREAMS kmod which when using the 301 * STREAMS Q the framework would automatictly flow-control based on the 302 * defined hiwat/lowat values as mblk_t's are enqueued/dequeued. 303 * 304 * As of FireEngine TCP write-side flow-control needs to take into account 305 * both the unsent tcp_xmit list bytes but also any squeue_t enqueued bytes 306 * (i.e. from tcp_wput() -> tcp_output()). 307 * 308 * This is accomplished by adding a new tcp_t fields, tcp_squeue_bytes, to 309 * count the number of bytes enqueued by tcp_wput() and the number of bytes 310 * dequeued and processed by tcp_output(). 311 * 312 * So, the total number of bytes unsent is (squeue_bytes + unsent) with all 313 * flow-control uses of unsent replaced with the macro TCP_UNSENT_BYTES. 314 */ 315 extern void tcp_clrqfull(tcp_t *); 316 extern void tcp_setqfull(tcp_t *); 317 318 #define TCP_UNSENT_BYTES(tcp) \ 319 ((tcp)->tcp_squeue_bytes + (tcp)->tcp_unsent) 320 321 /* 322 * Linked list struct to store listener connection limit configuration per 323 * IP stack. The list is stored at tcps_listener_conf in tcp_stack_t. 324 * 325 * tl_port: the listener port of this limit configuration 326 * tl_ratio: the maximum amount of memory consumed by all concurrent TCP 327 * connections created by a listener does not exceed 1/tl_ratio 328 * of the total system memory. Note that this is only an 329 * approximation. 330 * tl_link: linked list struct 331 */ 332 typedef struct tcp_listener_s { 333 in_port_t tl_port; 334 uint32_t tl_ratio; 335 list_node_t tl_link; 336 } tcp_listener_t; 337 338 /* 339 * If there is a limit set on the number of connections allowed per each 340 * listener, the following struct is used to store that counter. It keeps 341 * the number of TCP connection created by a listener. Note that this needs 342 * to be separated from the listener since the listener can go away before 343 * all the connections are gone. 344 * 345 * When the struct is allocated, tlc_cnt is set to 1. When a new connection 346 * is created by the listener, tlc_cnt is incremented by 1. When a connection 347 * created by the listener goes away, tlc_count is decremented by 1. When the 348 * listener itself goes away, tlc_cnt is decremented by one. The last 349 * connection (or the listener) which decrements tlc_cnt to zero frees the 350 * struct. 351 * 352 * tlc_max is the maximum number of concurrent TCP connections created from a 353 * listner. It is calculated when the tcp_listen_cnt_t is allocated. 354 * 355 * tlc_report_time stores the time when cmn_err() is called to report that the 356 * max has been exceeeded. Report is done at most once every 357 * TCP_TLC_REPORT_INTERVAL mins for a listener. 358 * 359 * tlc_drop stores the number of connection attempt dropped because the 360 * limit has reached. 361 */ 362 typedef struct tcp_listen_cnt_s { 363 uint32_t tlc_max; 364 uint32_t tlc_cnt; 365 int64_t tlc_report_time; 366 uint32_t tlc_drop; 367 } tcp_listen_cnt_t; 368 369 #define TCP_TLC_REPORT_INTERVAL (30 * MINUTES) 370 371 #define TCP_DECR_LISTEN_CNT(tcp) \ 372 { \ 373 ASSERT((tcp)->tcp_listen_cnt->tlc_cnt > 0); \ 374 if (atomic_dec_32_nv(&(tcp)->tcp_listen_cnt->tlc_cnt) == 0) \ 375 kmem_free((tcp)->tcp_listen_cnt, sizeof (tcp_listen_cnt_t)); \ 376 (tcp)->tcp_listen_cnt = NULL; \ 377 } 378 379 /* Increment and decrement the number of connections in tcp_stack_t. */ 380 #define TCPS_CONN_INC(tcps) \ 381 atomic_inc_64( \ 382 (uint64_t *)&(tcps)->tcps_sc[CPU->cpu_seqid]->tcp_sc_conn_cnt) 383 384 #define TCPS_CONN_DEC(tcps) \ 385 atomic_dec_64( \ 386 (uint64_t *)&(tcps)->tcps_sc[CPU->cpu_seqid]->tcp_sc_conn_cnt) 387 388 /* 389 * When the system is under memory pressure, stack variable tcps_reclaim is 390 * true, we shorten the connection timeout abort interval to tcp_early_abort 391 * seconds. Defined in tcp.c. 392 */ 393 extern uint32_t tcp_early_abort; 394 395 /* 396 * To reach to an eager in Q0 which can be dropped due to an incoming 397 * new SYN request when Q0 is full, a new doubly linked list is 398 * introduced. This list allows to select an eager from Q0 in O(1) time. 399 * This is needed to avoid spending too much time walking through the 400 * long list of eagers in Q0 when tcp_drop_q0() is called. Each member of 401 * this new list has to be a member of Q0. 402 * This list is headed by listener's tcp_t. When the list is empty, 403 * both the pointers - tcp_eager_next_drop_q0 and tcp_eager_prev_drop_q0, 404 * of listener's tcp_t point to listener's tcp_t itself. 405 * 406 * Given an eager in Q0 and a listener, MAKE_DROPPABLE() puts the eager 407 * in the list. MAKE_UNDROPPABLE() takes the eager out of the list. 408 * These macros do not affect the eager's membership to Q0. 409 */ 410 #define MAKE_DROPPABLE(listener, eager) \ 411 if ((eager)->tcp_eager_next_drop_q0 == NULL) { \ 412 (listener)->tcp_eager_next_drop_q0->tcp_eager_prev_drop_q0\ 413 = (eager); \ 414 (eager)->tcp_eager_prev_drop_q0 = (listener); \ 415 (eager)->tcp_eager_next_drop_q0 = \ 416 (listener)->tcp_eager_next_drop_q0; \ 417 (listener)->tcp_eager_next_drop_q0 = (eager); \ 418 } 419 420 #define MAKE_UNDROPPABLE(eager) \ 421 if ((eager)->tcp_eager_next_drop_q0 != NULL) { \ 422 (eager)->tcp_eager_next_drop_q0->tcp_eager_prev_drop_q0 \ 423 = (eager)->tcp_eager_prev_drop_q0; \ 424 (eager)->tcp_eager_prev_drop_q0->tcp_eager_next_drop_q0 \ 425 = (eager)->tcp_eager_next_drop_q0; \ 426 (eager)->tcp_eager_prev_drop_q0 = NULL; \ 427 (eager)->tcp_eager_next_drop_q0 = NULL; \ 428 } 429 430 /* 431 * The format argument to pass to tcp_display(). 432 * DISP_PORT_ONLY means that the returned string has only port info. 433 * DISP_ADDR_AND_PORT means that the returned string also contains the 434 * remote and local IP address. 435 */ 436 #define DISP_PORT_ONLY 1 437 #define DISP_ADDR_AND_PORT 2 438 439 #define IP_ADDR_CACHE_SIZE 2048 440 #define IP_ADDR_CACHE_HASH(faddr) \ 441 (ntohl(faddr) & (IP_ADDR_CACHE_SIZE -1)) 442 443 /* TCP cwnd burst factor. */ 444 #define TCP_CWND_INFINITE 65535 445 #define TCP_CWND_SS 3 446 #define TCP_CWND_NORMAL 5 447 448 /* 449 * TCP reassembly macros. We hide starting and ending sequence numbers in 450 * b_next and b_prev of messages on the reassembly queue. The messages are 451 * chained using b_cont. These macros are used in tcp_reass() so we don't 452 * have to see the ugly casts and assignments. 453 */ 454 #define TCP_REASS_SEQ(mp) ((uint32_t)(uintptr_t)((mp)->b_next)) 455 #define TCP_REASS_SET_SEQ(mp, u) ((mp)->b_next = \ 456 (mblk_t *)(uintptr_t)(u)) 457 #define TCP_REASS_END(mp) ((uint32_t)(uintptr_t)((mp)->b_prev)) 458 #define TCP_REASS_SET_END(mp, u) ((mp)->b_prev = \ 459 (mblk_t *)(uintptr_t)(u)) 460 461 #define tcps_time_wait_interval tcps_propinfo_tbl[0].prop_cur_uval 462 #define tcps_conn_req_max_q tcps_propinfo_tbl[1].prop_cur_uval 463 #define tcps_conn_req_max_q0 tcps_propinfo_tbl[2].prop_cur_uval 464 #define tcps_conn_req_min tcps_propinfo_tbl[3].prop_cur_uval 465 #define tcps_conn_grace_period tcps_propinfo_tbl[4].prop_cur_uval 466 #define tcps_cwnd_max_ tcps_propinfo_tbl[5].prop_cur_uval 467 #define tcps_dbg tcps_propinfo_tbl[6].prop_cur_uval 468 #define tcps_smallest_nonpriv_port tcps_propinfo_tbl[7].prop_cur_uval 469 #define tcps_ip_abort_cinterval tcps_propinfo_tbl[8].prop_cur_uval 470 #define tcps_ip_abort_linterval tcps_propinfo_tbl[9].prop_cur_uval 471 #define tcps_ip_abort_interval tcps_propinfo_tbl[10].prop_cur_uval 472 #define tcps_ip_notify_cinterval tcps_propinfo_tbl[11].prop_cur_uval 473 #define tcps_ip_notify_interval tcps_propinfo_tbl[12].prop_cur_uval 474 #define tcps_ipv4_ttl tcps_propinfo_tbl[13].prop_cur_uval 475 #define tcps_keepalive_interval_high tcps_propinfo_tbl[14].prop_max_uval 476 #define tcps_keepalive_interval tcps_propinfo_tbl[14].prop_cur_uval 477 #define tcps_keepalive_interval_low tcps_propinfo_tbl[14].prop_min_uval 478 #define tcps_maxpsz_multiplier tcps_propinfo_tbl[15].prop_cur_uval 479 #define tcps_mss_def_ipv4 tcps_propinfo_tbl[16].prop_cur_uval 480 #define tcps_mss_max_ipv4 tcps_propinfo_tbl[17].prop_cur_uval 481 #define tcps_mss_min tcps_propinfo_tbl[18].prop_cur_uval 482 #define tcps_naglim_def tcps_propinfo_tbl[19].prop_cur_uval 483 #define tcps_rexmit_interval_initial_high \ 484 tcps_propinfo_tbl[20].prop_max_uval 485 #define tcps_rexmit_interval_initial tcps_propinfo_tbl[20].prop_cur_uval 486 #define tcps_rexmit_interval_initial_low \ 487 tcps_propinfo_tbl[20].prop_min_uval 488 #define tcps_rexmit_interval_max_high tcps_propinfo_tbl[21].prop_max_uval 489 #define tcps_rexmit_interval_max tcps_propinfo_tbl[21].prop_cur_uval 490 #define tcps_rexmit_interval_max_low tcps_propinfo_tbl[21].prop_min_uval 491 #define tcps_rexmit_interval_min_high tcps_propinfo_tbl[22].prop_max_uval 492 #define tcps_rexmit_interval_min tcps_propinfo_tbl[22].prop_cur_uval 493 #define tcps_rexmit_interval_min_low tcps_propinfo_tbl[22].prop_min_uval 494 #define tcps_deferred_ack_interval tcps_propinfo_tbl[23].prop_cur_uval 495 #define tcps_snd_lowat_fraction tcps_propinfo_tbl[24].prop_cur_uval 496 #define tcps_dupack_fast_retransmit tcps_propinfo_tbl[25].prop_cur_uval 497 #define tcps_ignore_path_mtu tcps_propinfo_tbl[26].prop_cur_bval 498 #define tcps_smallest_anon_port tcps_propinfo_tbl[27].prop_cur_uval 499 #define tcps_largest_anon_port tcps_propinfo_tbl[28].prop_cur_uval 500 #define tcps_xmit_hiwat tcps_propinfo_tbl[29].prop_cur_uval 501 #define tcps_xmit_lowat tcps_propinfo_tbl[30].prop_cur_uval 502 #define tcps_recv_hiwat tcps_propinfo_tbl[31].prop_cur_uval 503 #define tcps_recv_hiwat_minmss tcps_propinfo_tbl[32].prop_cur_uval 504 #define tcps_fin_wait_2_flush_interval_high \ 505 tcps_propinfo_tbl[33].prop_max_uval 506 #define tcps_fin_wait_2_flush_interval tcps_propinfo_tbl[33].prop_cur_uval 507 #define tcps_fin_wait_2_flush_interval_low \ 508 tcps_propinfo_tbl[33].prop_min_uval 509 #define tcps_max_buf tcps_propinfo_tbl[34].prop_cur_uval 510 #define tcps_strong_iss tcps_propinfo_tbl[35].prop_cur_uval 511 #define tcps_rtt_updates tcps_propinfo_tbl[36].prop_cur_uval 512 #define tcps_wscale_always tcps_propinfo_tbl[37].prop_cur_bval 513 #define tcps_tstamp_always tcps_propinfo_tbl[38].prop_cur_bval 514 #define tcps_tstamp_if_wscale tcps_propinfo_tbl[39].prop_cur_bval 515 #define tcps_rexmit_interval_extra tcps_propinfo_tbl[40].prop_cur_uval 516 #define tcps_deferred_acks_max tcps_propinfo_tbl[41].prop_cur_uval 517 #define tcps_slow_start_after_idle tcps_propinfo_tbl[42].prop_cur_uval 518 #define tcps_slow_start_initial tcps_propinfo_tbl[43].prop_cur_uval 519 #define tcps_sack_permitted tcps_propinfo_tbl[44].prop_cur_uval 520 #define tcps_ipv6_hoplimit tcps_propinfo_tbl[45].prop_cur_uval 521 #define tcps_mss_def_ipv6 tcps_propinfo_tbl[46].prop_cur_uval 522 #define tcps_mss_max_ipv6 tcps_propinfo_tbl[47].prop_cur_uval 523 #define tcps_rev_src_routes tcps_propinfo_tbl[48].prop_cur_bval 524 #define tcps_local_dack_interval tcps_propinfo_tbl[49].prop_cur_uval 525 #define tcps_local_dacks_max tcps_propinfo_tbl[50].prop_cur_uval 526 #define tcps_ecn_permitted tcps_propinfo_tbl[51].prop_cur_uval 527 #define tcps_rst_sent_rate_enabled tcps_propinfo_tbl[52].prop_cur_bval 528 #define tcps_rst_sent_rate tcps_propinfo_tbl[53].prop_cur_uval 529 #define tcps_push_timer_interval tcps_propinfo_tbl[54].prop_cur_uval 530 #define tcps_use_smss_as_mss_opt tcps_propinfo_tbl[55].prop_cur_bval 531 #define tcps_keepalive_abort_interval_high \ 532 tcps_propinfo_tbl[56].prop_max_uval 533 #define tcps_keepalive_abort_interval \ 534 tcps_propinfo_tbl[56].prop_cur_uval 535 #define tcps_keepalive_abort_interval_low \ 536 tcps_propinfo_tbl[56].prop_min_uval 537 #define tcps_wroff_xtra tcps_propinfo_tbl[57].prop_cur_uval 538 #define tcps_dev_flow_ctl tcps_propinfo_tbl[58].prop_cur_bval 539 #define tcps_reass_timeout tcps_propinfo_tbl[59].prop_cur_uval 540 #define tcps_iss_incr tcps_propinfo_tbl[65].prop_cur_uval 541 542 extern struct qinit tcp_rinitv4, tcp_rinitv6; 543 extern boolean_t do_tcp_fusion; 544 545 /* 546 * Object to represent database of options to search passed to 547 * {sock,tpi}optcom_req() interface routine to take care of option 548 * management and associated methods. 549 */ 550 extern optdb_obj_t tcp_opt_obj; 551 extern uint_t tcp_max_optsize; 552 553 extern int tcp_squeue_flag; 554 555 extern uint_t tcp_free_list_max_cnt; 556 557 /* 558 * Functions in tcp.c. 559 */ 560 extern void tcp_acceptor_hash_insert(t_uscalar_t, tcp_t *); 561 extern tcp_t *tcp_acceptor_hash_lookup(t_uscalar_t, tcp_stack_t *); 562 extern void tcp_acceptor_hash_remove(tcp_t *); 563 extern mblk_t *tcp_ack_mp(tcp_t *); 564 extern int tcp_build_hdrs(tcp_t *); 565 extern void tcp_cleanup(tcp_t *); 566 extern int tcp_clean_death(tcp_t *, int); 567 extern void tcp_clean_death_wrapper(void *, mblk_t *, void *, 568 ip_recv_attr_t *); 569 extern void tcp_close_common(conn_t *, int); 570 extern void tcp_close_detached(tcp_t *); 571 extern void tcp_close_mpp(mblk_t **); 572 extern void tcp_closei_local(tcp_t *); 573 extern sock_lower_handle_t tcp_create(int, int, int, sock_downcalls_t **, 574 uint_t *, int *, int, cred_t *); 575 extern conn_t *tcp_create_common(cred_t *, boolean_t, boolean_t, int *); 576 extern void tcp_disconnect(tcp_t *, mblk_t *); 577 extern char *tcp_display(tcp_t *, char *, char); 578 extern int tcp_do_bind(conn_t *, struct sockaddr *, socklen_t, cred_t *, 579 boolean_t); 580 extern int tcp_do_connect(conn_t *, const struct sockaddr *, socklen_t, 581 cred_t *, pid_t); 582 extern int tcp_do_listen(conn_t *, struct sockaddr *, socklen_t, int, 583 cred_t *, boolean_t); 584 extern int tcp_do_unbind(conn_t *); 585 extern boolean_t tcp_eager_blowoff(tcp_t *, t_scalar_t); 586 extern void tcp_eager_cleanup(tcp_t *, boolean_t); 587 extern void tcp_eager_kill(void *, mblk_t *, void *, ip_recv_attr_t *); 588 extern void tcp_eager_unlink(tcp_t *); 589 extern void tcp_init_values(tcp_t *, tcp_t *); 590 extern void tcp_ipsec_cleanup(tcp_t *); 591 extern int tcp_maxpsz_set(tcp_t *, boolean_t); 592 extern void tcp_mss_set(tcp_t *, uint32_t); 593 extern void tcp_reinput(conn_t *, mblk_t *, ip_recv_attr_t *, ip_stack_t *); 594 extern void tcp_rsrv(queue_t *); 595 extern uint_t tcp_rwnd_reopen(tcp_t *); 596 extern int tcp_rwnd_set(tcp_t *, uint32_t); 597 extern int tcp_set_destination(tcp_t *); 598 extern void tcp_set_ws_value(tcp_t *); 599 extern void tcp_stop_lingering(tcp_t *); 600 extern void tcp_update_pmtu(tcp_t *, boolean_t); 601 extern mblk_t *tcp_zcopy_backoff(tcp_t *, mblk_t *, boolean_t); 602 extern boolean_t tcp_zcopy_check(tcp_t *); 603 extern void tcp_zcopy_notify(tcp_t *); 604 extern void tcp_get_proto_props(tcp_t *, struct sock_proto_props *); 605 606 /* 607 * Bind related functions in tcp_bind.c 608 */ 609 extern int tcp_bind_check(conn_t *, struct sockaddr *, socklen_t, 610 cred_t *, boolean_t); 611 extern void tcp_bind_hash_insert(tf_t *, tcp_t *, int); 612 extern void tcp_bind_hash_remove(tcp_t *); 613 extern in_port_t tcp_bindi(tcp_t *, in_port_t, const in6_addr_t *, 614 int, boolean_t, boolean_t, boolean_t); 615 extern in_port_t tcp_update_next_port(in_port_t, const tcp_t *, 616 boolean_t); 617 618 /* 619 * Fusion related functions in tcp_fusion.c. 620 */ 621 extern void tcp_fuse(tcp_t *, uchar_t *, tcpha_t *); 622 extern void tcp_unfuse(tcp_t *); 623 extern boolean_t tcp_fuse_output(tcp_t *, mblk_t *, uint32_t); 624 extern void tcp_fuse_output_urg(tcp_t *, mblk_t *); 625 extern boolean_t tcp_fuse_rcv_drain(queue_t *, tcp_t *, mblk_t **); 626 extern size_t tcp_fuse_set_rcv_hiwat(tcp_t *, size_t); 627 extern int tcp_fuse_maxpsz(tcp_t *); 628 extern void tcp_fuse_backenable(tcp_t *); 629 extern void tcp_iss_key_init(uint8_t *, int, tcp_stack_t *); 630 631 /* 632 * Output related functions in tcp_output.c. 633 */ 634 extern void tcp_close_output(void *, mblk_t *, void *, ip_recv_attr_t *); 635 extern void tcp_output(void *, mblk_t *, void *, ip_recv_attr_t *); 636 extern void tcp_output_urgent(void *, mblk_t *, void *, ip_recv_attr_t *); 637 extern void tcp_rexmit_after_error(tcp_t *); 638 extern void tcp_sack_rexmit(tcp_t *, uint_t *); 639 extern void tcp_send_data(tcp_t *, mblk_t *); 640 extern void tcp_send_synack(void *, mblk_t *, void *, ip_recv_attr_t *); 641 extern void tcp_shutdown_output(void *, mblk_t *, void *, ip_recv_attr_t *); 642 extern void tcp_ss_rexmit(tcp_t *); 643 extern void tcp_update_xmit_tail(tcp_t *, uint32_t); 644 extern void tcp_wput(queue_t *, mblk_t *); 645 extern void tcp_wput_data(tcp_t *, mblk_t *, boolean_t); 646 extern void tcp_wput_sock(queue_t *, mblk_t *); 647 extern void tcp_wput_fallback(queue_t *, mblk_t *); 648 extern void tcp_xmit_ctl(char *, tcp_t *, uint32_t, uint32_t, int); 649 extern void tcp_xmit_listeners_reset(mblk_t *, ip_recv_attr_t *, 650 ip_stack_t *i, conn_t *); 651 extern mblk_t *tcp_xmit_mp(tcp_t *, mblk_t *, int32_t, int32_t *, 652 mblk_t **, uint32_t, boolean_t, uint32_t *, boolean_t); 653 654 /* 655 * Input related functions in tcp_input.c. 656 */ 657 extern void tcp_icmp_input(void *, mblk_t *, void *, ip_recv_attr_t *); 658 extern void tcp_input_data(void *, mblk_t *, void *, ip_recv_attr_t *); 659 extern void tcp_input_listener_unbound(void *, mblk_t *, void *, 660 ip_recv_attr_t *); 661 extern boolean_t tcp_paws_check(tcp_t *, tcpha_t *, tcp_opt_t *); 662 extern uint_t tcp_rcv_drain(tcp_t *); 663 extern void tcp_rcv_enqueue(tcp_t *, mblk_t *, uint_t, cred_t *); 664 extern boolean_t tcp_verifyicmp(conn_t *, void *, icmph_t *, icmp6_t *, 665 ip_recv_attr_t *); 666 667 /* 668 * Kernel socket related functions in tcp_socket.c. 669 */ 670 extern int tcp_fallback(sock_lower_handle_t, queue_t *, boolean_t, 671 so_proto_quiesced_cb_t, sock_quiesce_arg_t *); 672 extern boolean_t tcp_newconn_notify(tcp_t *, ip_recv_attr_t *); 673 674 /* 675 * Timer related functions in tcp_timers.c. 676 */ 677 extern void tcp_ack_timer(void *); 678 extern void tcp_close_linger_timeout(void *); 679 extern void tcp_keepalive_timer(void *); 680 extern void tcp_push_timer(void *); 681 extern void tcp_reass_timer(void *); 682 extern mblk_t *tcp_timermp_alloc(int); 683 extern void tcp_timermp_free(tcp_t *); 684 extern timeout_id_t tcp_timeout(conn_t *, void (*)(void *), hrtime_t); 685 extern clock_t tcp_timeout_cancel(conn_t *, timeout_id_t); 686 extern void tcp_timer(void *arg); 687 extern void tcp_timers_stop(tcp_t *); 688 689 /* 690 * TCP TPI related functions in tcp_tpi.c. 691 */ 692 extern void tcp_addr_req(tcp_t *, mblk_t *); 693 extern void tcp_capability_req(tcp_t *, mblk_t *); 694 extern boolean_t tcp_conn_con(tcp_t *, uchar_t *, mblk_t *, 695 mblk_t **, ip_recv_attr_t *); 696 extern void tcp_err_ack(tcp_t *, mblk_t *, int, int); 697 extern void tcp_err_ack_prim(tcp_t *, mblk_t *, int, int, int); 698 extern void tcp_info_req(tcp_t *, mblk_t *); 699 extern void tcp_send_conn_ind(void *, mblk_t *, void *); 700 extern void tcp_send_pending(void *, mblk_t *, void *, ip_recv_attr_t *); 701 extern void tcp_tpi_accept(queue_t *, mblk_t *); 702 extern void tcp_tpi_bind(tcp_t *, mblk_t *); 703 extern int tcp_tpi_close(queue_t *, int); 704 extern int tcp_tpi_close_accept(queue_t *); 705 extern void tcp_tpi_connect(tcp_t *, mblk_t *); 706 extern int tcp_tpi_opt_get(queue_t *, t_scalar_t, t_scalar_t, uchar_t *); 707 extern int tcp_tpi_opt_set(queue_t *, uint_t, int, int, uint_t, uchar_t *, 708 uint_t *, uchar_t *, void *, cred_t *); 709 extern void tcp_tpi_unbind(tcp_t *, mblk_t *); 710 extern void tcp_tli_accept(tcp_t *, mblk_t *); 711 extern void tcp_use_pure_tpi(tcp_t *); 712 extern void tcp_do_capability_ack(tcp_t *, struct T_capability_ack *, 713 t_uscalar_t); 714 715 /* 716 * TCP option processing related functions in tcp_opt_data.c 717 */ 718 extern int tcp_opt_get(conn_t *, int, int, uchar_t *); 719 extern int tcp_opt_set(conn_t *, uint_t, int, int, uint_t, uchar_t *, 720 uint_t *, uchar_t *, void *, cred_t *); 721 722 /* 723 * TCP time wait processing related functions in tcp_time_wait.c. 724 */ 725 extern void tcp_time_wait_append(tcp_t *); 726 extern void tcp_time_wait_collector(void *); 727 extern boolean_t tcp_time_wait_remove(tcp_t *, tcp_squeue_priv_t *); 728 extern void tcp_time_wait_processing(tcp_t *, mblk_t *, uint32_t, 729 uint32_t, int, tcpha_t *, ip_recv_attr_t *); 730 731 /* 732 * Misc functions in tcp_misc.c. 733 */ 734 extern uint32_t tcp_find_listener_conf(tcp_stack_t *, in_port_t); 735 extern void tcp_ioctl_abort_conn(queue_t *, mblk_t *); 736 extern void tcp_listener_conf_cleanup(tcp_stack_t *); 737 extern void tcp_stack_cpu_add(tcp_stack_t *, processorid_t); 738 739 #endif /* _KERNEL */ 740 741 #ifdef __cplusplus 742 } 743 #endif 744 745 #endif /* _INET_TCP_IMPL_H */ 746