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