Tristan Matthews | 0a329cc | 2013-07-17 13:20:14 -0400 | [diff] [blame] | 1 | /* $Id$ */ |
| 2 | /* |
| 3 | * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) |
| 4 | * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | #include <pjsip/sip_transport_tcp.h> |
| 21 | #include <pjsip/sip_endpoint.h> |
| 22 | #include <pjsip/sip_errno.h> |
| 23 | #include <pj/compat/socket.h> |
| 24 | #include <pj/addr_resolv.h> |
| 25 | #include <pj/activesock.h> |
| 26 | #include <pj/assert.h> |
| 27 | #include <pj/lock.h> |
| 28 | #include <pj/log.h> |
| 29 | #include <pj/os.h> |
| 30 | #include <pj/pool.h> |
| 31 | #include <pj/string.h> |
| 32 | |
| 33 | /* Only declare the API if PJ_HAS_TCP is true */ |
| 34 | #if defined(PJ_HAS_TCP) && PJ_HAS_TCP!=0 |
| 35 | |
| 36 | |
| 37 | #define THIS_FILE "sip_transport_tcp.c" |
| 38 | |
| 39 | #define MAX_ASYNC_CNT 16 |
| 40 | #define POOL_LIS_INIT 512 |
| 41 | #define POOL_LIS_INC 512 |
| 42 | #define POOL_TP_INIT 512 |
| 43 | #define POOL_TP_INC 512 |
| 44 | |
| 45 | struct tcp_listener; |
| 46 | struct tcp_transport; |
| 47 | |
| 48 | |
| 49 | /* |
| 50 | * This is the TCP listener, which is a "descendant" of pjsip_tpfactory (the |
| 51 | * SIP transport factory). |
| 52 | */ |
| 53 | struct tcp_listener |
| 54 | { |
| 55 | pjsip_tpfactory factory; |
| 56 | pj_bool_t is_registered; |
| 57 | pjsip_endpoint *endpt; |
| 58 | pjsip_tpmgr *tpmgr; |
| 59 | pj_activesock_t *asock; |
| 60 | pj_sockaddr bound_addr; |
| 61 | pj_qos_type qos_type; |
| 62 | pj_qos_params qos_params; |
| 63 | }; |
| 64 | |
| 65 | |
| 66 | /* |
| 67 | * This structure is used to keep delayed transmit operation in a list. |
| 68 | * A delayed transmission occurs when application sends tx_data when |
| 69 | * the TCP connect/establishment is still in progress. These delayed |
| 70 | * transmission will be "flushed" once the socket is connected (either |
| 71 | * successfully or with errors). |
| 72 | */ |
| 73 | struct delayed_tdata |
| 74 | { |
| 75 | PJ_DECL_LIST_MEMBER(struct delayed_tdata); |
| 76 | pjsip_tx_data_op_key *tdata_op_key; |
| 77 | pj_time_val timeout; |
| 78 | }; |
| 79 | |
| 80 | |
| 81 | /* |
| 82 | * This structure describes the TCP transport, and it's descendant of |
| 83 | * pjsip_transport. |
| 84 | */ |
| 85 | struct tcp_transport |
| 86 | { |
| 87 | pjsip_transport base; |
| 88 | pj_bool_t is_server; |
| 89 | |
| 90 | /* Do not save listener instance in the transport, because |
| 91 | * listener might be destroyed during transport's lifetime. |
| 92 | * See http://trac.pjsip.org/repos/ticket/491 |
| 93 | struct tcp_listener *listener; |
| 94 | */ |
| 95 | |
| 96 | pj_bool_t is_registered; |
| 97 | pj_bool_t is_closing; |
| 98 | pj_status_t close_reason; |
| 99 | pj_sock_t sock; |
| 100 | pj_activesock_t *asock; |
| 101 | pj_bool_t has_pending_connect; |
| 102 | |
| 103 | /* Keep-alive timer. */ |
| 104 | pj_timer_entry ka_timer; |
| 105 | pj_time_val last_activity; |
| 106 | pjsip_tx_data_op_key ka_op_key; |
| 107 | pj_str_t ka_pkt; |
| 108 | |
| 109 | /* TCP transport can only have one rdata! |
| 110 | * Otherwise chunks of incoming PDU may be received on different |
| 111 | * buffer. |
| 112 | */ |
| 113 | pjsip_rx_data rdata; |
| 114 | |
| 115 | /* Pending transmission list. */ |
| 116 | struct delayed_tdata delayed_list; |
| 117 | }; |
| 118 | |
| 119 | |
| 120 | /**************************************************************************** |
| 121 | * PROTOTYPES |
| 122 | */ |
| 123 | |
| 124 | /* This callback is called when pending accept() operation completes. */ |
| 125 | static pj_bool_t on_accept_complete(pj_activesock_t *asock, |
| 126 | pj_sock_t newsock, |
| 127 | const pj_sockaddr_t *src_addr, |
| 128 | int src_addr_len); |
| 129 | |
| 130 | /* This callback is called by transport manager to destroy listener */ |
| 131 | static pj_status_t lis_destroy(pjsip_tpfactory *factory); |
| 132 | |
| 133 | /* This callback is called by transport manager to create transport */ |
| 134 | static pj_status_t lis_create_transport(pjsip_tpfactory *factory, |
| 135 | pjsip_tpmgr *mgr, |
| 136 | pjsip_endpoint *endpt, |
| 137 | const pj_sockaddr *rem_addr, |
| 138 | int addr_len, |
| 139 | pjsip_transport **transport); |
| 140 | |
| 141 | /* Common function to create and initialize transport */ |
| 142 | static pj_status_t tcp_create(struct tcp_listener *listener, |
| 143 | pj_pool_t *pool, |
| 144 | pj_sock_t sock, pj_bool_t is_server, |
| 145 | const pj_sockaddr *local, |
| 146 | const pj_sockaddr *remote, |
| 147 | struct tcp_transport **p_tcp); |
| 148 | |
| 149 | |
| 150 | static void tcp_perror(const char *sender, const char *title, |
| 151 | pj_status_t status) |
| 152 | { |
| 153 | char errmsg[PJ_ERR_MSG_SIZE]; |
| 154 | |
| 155 | pj_strerror(status, errmsg, sizeof(errmsg)); |
| 156 | |
| 157 | PJ_LOG(1,(sender, "%s: %s [code=%d]", title, errmsg, status)); |
| 158 | } |
| 159 | |
| 160 | |
| 161 | static void sockaddr_to_host_port( pj_pool_t *pool, |
| 162 | pjsip_host_port *host_port, |
| 163 | const pj_sockaddr *addr ) |
| 164 | { |
| 165 | host_port->host.ptr = (char*) pj_pool_alloc(pool, PJ_INET6_ADDRSTRLEN+4); |
| 166 | pj_sockaddr_print(addr, host_port->host.ptr, PJ_INET6_ADDRSTRLEN+4, 0); |
| 167 | host_port->host.slen = pj_ansi_strlen(host_port->host.ptr); |
| 168 | host_port->port = pj_sockaddr_get_port(addr); |
| 169 | } |
| 170 | |
| 171 | |
| 172 | static void tcp_init_shutdown(struct tcp_transport *tcp, pj_status_t status) |
| 173 | { |
| 174 | pjsip_tp_state_callback state_cb; |
| 175 | |
| 176 | if (tcp->close_reason == PJ_SUCCESS) |
| 177 | tcp->close_reason = status; |
| 178 | |
| 179 | if (tcp->base.is_shutdown) |
| 180 | return; |
| 181 | |
| 182 | /* Prevent immediate transport destroy by application, as transport |
| 183 | * state notification callback may be stacked and transport instance |
| 184 | * must remain valid at any point in the callback. |
| 185 | */ |
| 186 | pjsip_transport_add_ref(&tcp->base); |
| 187 | |
| 188 | /* Notify application of transport disconnected state */ |
| 189 | state_cb = pjsip_tpmgr_get_state_cb(tcp->base.tpmgr); |
| 190 | if (state_cb) { |
| 191 | pjsip_transport_state_info state_info; |
| 192 | |
| 193 | pj_bzero(&state_info, sizeof(state_info)); |
| 194 | state_info.status = tcp->close_reason; |
| 195 | (*state_cb)(&tcp->base, PJSIP_TP_STATE_DISCONNECTED, &state_info); |
| 196 | } |
| 197 | |
| 198 | /* We can not destroy the transport since high level objects may |
| 199 | * still keep reference to this transport. So we can only |
| 200 | * instruct transport manager to gracefully start the shutdown |
| 201 | * procedure for this transport. |
| 202 | */ |
| 203 | pjsip_transport_shutdown(&tcp->base); |
| 204 | |
| 205 | /* Now, it is ok to destroy the transport. */ |
| 206 | pjsip_transport_dec_ref(&tcp->base); |
| 207 | } |
| 208 | |
| 209 | |
| 210 | /* |
| 211 | * Initialize pjsip_tcp_transport_cfg structure with default values. |
| 212 | */ |
| 213 | PJ_DEF(void) pjsip_tcp_transport_cfg_default(pjsip_tcp_transport_cfg *cfg, |
| 214 | int af) |
| 215 | { |
| 216 | pj_bzero(cfg, sizeof(*cfg)); |
| 217 | cfg->af = af; |
| 218 | pj_sockaddr_init(cfg->af, &cfg->bind_addr, NULL, 0); |
| 219 | cfg->async_cnt = 1; |
| 220 | cfg->reuse_addr = PJSIP_TCP_TRANSPORT_REUSEADDR; |
| 221 | } |
| 222 | |
| 223 | |
| 224 | /**************************************************************************** |
| 225 | * The TCP listener/transport factory. |
| 226 | */ |
| 227 | |
| 228 | /* |
| 229 | * This is the public API to create, initialize, register, and start the |
| 230 | * TCP listener. |
| 231 | */ |
| 232 | PJ_DEF(pj_status_t) pjsip_tcp_transport_start3( |
| 233 | pjsip_endpoint *endpt, |
| 234 | const pjsip_tcp_transport_cfg *cfg, |
| 235 | pjsip_tpfactory **p_factory |
| 236 | ) |
| 237 | { |
| 238 | pj_pool_t *pool; |
| 239 | pj_sock_t sock = PJ_INVALID_SOCKET; |
| 240 | struct tcp_listener *listener; |
| 241 | pj_activesock_cfg asock_cfg; |
| 242 | pj_activesock_cb listener_cb; |
| 243 | pj_sockaddr *listener_addr; |
| 244 | int addr_len; |
| 245 | pj_status_t status; |
| 246 | |
| 247 | /* Sanity check */ |
| 248 | PJ_ASSERT_RETURN(endpt && cfg->async_cnt, PJ_EINVAL); |
| 249 | |
| 250 | /* Verify that address given in a_name (if any) is valid */ |
| 251 | if (cfg->addr_name.host.slen) { |
| 252 | pj_sockaddr tmp; |
| 253 | |
| 254 | status = pj_sockaddr_init(cfg->af, &tmp, &cfg->addr_name.host, |
| 255 | (pj_uint16_t)cfg->addr_name.port); |
| 256 | if (status != PJ_SUCCESS || !pj_sockaddr_has_addr(&tmp) || |
| 257 | (cfg->af==pj_AF_INET() && |
| 258 | tmp.ipv4.sin_addr.s_addr==PJ_INADDR_NONE)) |
| 259 | { |
| 260 | /* Invalid address */ |
| 261 | return PJ_EINVAL; |
| 262 | } |
| 263 | } |
| 264 | |
| 265 | pool = pjsip_endpt_create_pool(endpt, "tcplis", POOL_LIS_INIT, |
| 266 | POOL_LIS_INC); |
| 267 | PJ_ASSERT_RETURN(pool, PJ_ENOMEM); |
| 268 | |
| 269 | |
| 270 | listener = PJ_POOL_ZALLOC_T(pool, struct tcp_listener); |
| 271 | listener->factory.pool = pool; |
| 272 | listener->factory.type = cfg->af==pj_AF_INET() ? PJSIP_TRANSPORT_TCP : |
| 273 | PJSIP_TRANSPORT_TCP6; |
| 274 | listener->factory.type_name = (char*) |
| 275 | pjsip_transport_get_type_name(listener->factory.type); |
| 276 | listener->factory.flag = |
| 277 | pjsip_transport_get_flag_from_type(listener->factory.type); |
| 278 | listener->qos_type = cfg->qos_type; |
| 279 | pj_memcpy(&listener->qos_params, &cfg->qos_params, |
| 280 | sizeof(cfg->qos_params)); |
| 281 | |
| 282 | pj_ansi_strcpy(listener->factory.obj_name, "tcplis"); |
| 283 | if (listener->factory.type==PJSIP_TRANSPORT_TCP6) |
| 284 | pj_ansi_strcat(listener->factory.obj_name, "6"); |
| 285 | |
| 286 | status = pj_lock_create_recursive_mutex(pool, listener->factory.obj_name, |
| 287 | &listener->factory.lock); |
| 288 | if (status != PJ_SUCCESS) |
| 289 | goto on_error; |
| 290 | |
| 291 | |
| 292 | /* Create socket */ |
| 293 | status = pj_sock_socket(cfg->af, pj_SOCK_STREAM(), 0, &sock); |
| 294 | if (status != PJ_SUCCESS) |
| 295 | goto on_error; |
| 296 | |
| 297 | /* Apply QoS, if specified */ |
| 298 | status = pj_sock_apply_qos2(sock, cfg->qos_type, &cfg->qos_params, |
| 299 | 2, listener->factory.obj_name, |
| 300 | "SIP TCP listener socket"); |
| 301 | |
| 302 | /* Apply SO_REUSEADDR */ |
| 303 | if (cfg->reuse_addr) { |
| 304 | int enabled = 1; |
| 305 | status = pj_sock_setsockopt(sock, pj_SOL_SOCKET(), pj_SO_REUSEADDR(), |
| 306 | &enabled, sizeof(enabled)); |
| 307 | if (status != PJ_SUCCESS) { |
| 308 | PJ_PERROR(4,(listener->factory.obj_name, status, |
| 309 | "Warning: error applying SO_REUSEADDR")); |
| 310 | } |
| 311 | } |
| 312 | |
| 313 | /* Bind address may be different than factory.local_addr because |
| 314 | * factory.local_addr will be resolved below. |
| 315 | */ |
| 316 | pj_sockaddr_cp(&listener->bound_addr, &cfg->bind_addr); |
| 317 | |
| 318 | /* Bind socket */ |
| 319 | listener_addr = &listener->factory.local_addr; |
| 320 | pj_sockaddr_cp(listener_addr, &cfg->bind_addr); |
| 321 | |
| 322 | status = pj_sock_bind(sock, listener_addr, |
| 323 | pj_sockaddr_get_len(listener_addr)); |
| 324 | if (status != PJ_SUCCESS) |
| 325 | goto on_error; |
| 326 | |
| 327 | /* Retrieve the bound address */ |
| 328 | addr_len = pj_sockaddr_get_len(listener_addr); |
| 329 | status = pj_sock_getsockname(sock, listener_addr, &addr_len); |
| 330 | if (status != PJ_SUCCESS) |
| 331 | goto on_error; |
| 332 | |
| 333 | /* If published host/IP is specified, then use that address as the |
| 334 | * listener advertised address. |
| 335 | */ |
| 336 | if (cfg->addr_name.host.slen) { |
| 337 | /* Copy the address */ |
| 338 | listener->factory.addr_name = cfg->addr_name; |
| 339 | pj_strdup(listener->factory.pool, &listener->factory.addr_name.host, |
| 340 | &cfg->addr_name.host); |
| 341 | listener->factory.addr_name.port = cfg->addr_name.port; |
| 342 | |
| 343 | } else { |
| 344 | /* No published address is given, use the bound address */ |
| 345 | |
| 346 | /* If the address returns 0.0.0.0, use the default |
| 347 | * interface address as the transport's address. |
| 348 | */ |
| 349 | if (!pj_sockaddr_has_addr(listener_addr)) { |
| 350 | pj_sockaddr hostip; |
| 351 | |
| 352 | status = pj_gethostip(listener->bound_addr.addr.sa_family, |
| 353 | &hostip); |
| 354 | if (status != PJ_SUCCESS) |
| 355 | goto on_error; |
| 356 | |
| 357 | pj_sockaddr_copy_addr(listener_addr, &hostip); |
| 358 | } |
| 359 | |
| 360 | /* Save the address name */ |
| 361 | sockaddr_to_host_port(listener->factory.pool, |
| 362 | &listener->factory.addr_name, |
| 363 | listener_addr); |
| 364 | } |
| 365 | |
| 366 | /* If port is zero, get the bound port */ |
| 367 | if (listener->factory.addr_name.port == 0) { |
| 368 | listener->factory.addr_name.port = pj_sockaddr_get_port(listener_addr); |
| 369 | } |
| 370 | |
| 371 | pj_ansi_snprintf(listener->factory.obj_name, |
| 372 | sizeof(listener->factory.obj_name), |
| 373 | "tcplis:%d", listener->factory.addr_name.port); |
| 374 | |
| 375 | |
| 376 | /* Start listening to the address */ |
| 377 | status = pj_sock_listen(sock, PJSIP_TCP_TRANSPORT_BACKLOG); |
| 378 | if (status != PJ_SUCCESS) |
| 379 | goto on_error; |
| 380 | |
| 381 | |
| 382 | /* Create active socket */ |
| 383 | pj_activesock_cfg_default(&asock_cfg); |
| 384 | if (cfg->async_cnt > MAX_ASYNC_CNT) |
| 385 | asock_cfg.async_cnt = MAX_ASYNC_CNT; |
| 386 | else |
| 387 | asock_cfg.async_cnt = cfg->async_cnt; |
| 388 | |
| 389 | pj_bzero(&listener_cb, sizeof(listener_cb)); |
| 390 | listener_cb.on_accept_complete = &on_accept_complete; |
| 391 | status = pj_activesock_create(pool, sock, pj_SOCK_STREAM(), &asock_cfg, |
| 392 | pjsip_endpt_get_ioqueue(endpt), |
| 393 | &listener_cb, listener, |
| 394 | &listener->asock); |
| 395 | |
| 396 | /* Register to transport manager */ |
| 397 | listener->endpt = endpt; |
| 398 | listener->tpmgr = pjsip_endpt_get_tpmgr(endpt); |
| 399 | listener->factory.create_transport = lis_create_transport; |
| 400 | listener->factory.destroy = lis_destroy; |
| 401 | listener->is_registered = PJ_TRUE; |
| 402 | status = pjsip_tpmgr_register_tpfactory(listener->tpmgr, |
| 403 | &listener->factory); |
| 404 | if (status != PJ_SUCCESS) { |
| 405 | listener->is_registered = PJ_FALSE; |
| 406 | goto on_error; |
| 407 | } |
| 408 | |
| 409 | /* Start pending accept() operations */ |
| 410 | status = pj_activesock_start_accept(listener->asock, pool); |
| 411 | if (status != PJ_SUCCESS) |
| 412 | goto on_error; |
| 413 | |
| 414 | PJ_LOG(4,(listener->factory.obj_name, |
| 415 | "SIP TCP listener ready for incoming connections at %.*s:%d", |
| 416 | (int)listener->factory.addr_name.host.slen, |
| 417 | listener->factory.addr_name.host.ptr, |
| 418 | listener->factory.addr_name.port)); |
| 419 | |
| 420 | /* Return the pointer to user */ |
| 421 | if (p_factory) *p_factory = &listener->factory; |
| 422 | |
| 423 | return PJ_SUCCESS; |
| 424 | |
| 425 | on_error: |
| 426 | if (listener->asock==NULL && sock!=PJ_INVALID_SOCKET) |
| 427 | pj_sock_close(sock); |
| 428 | lis_destroy(&listener->factory); |
| 429 | return status; |
| 430 | } |
| 431 | |
| 432 | |
| 433 | /* |
| 434 | * This is the public API to create, initialize, register, and start the |
| 435 | * TCP listener. |
| 436 | */ |
| 437 | PJ_DEF(pj_status_t) pjsip_tcp_transport_start2(pjsip_endpoint *endpt, |
| 438 | const pj_sockaddr_in *local, |
| 439 | const pjsip_host_port *a_name, |
| 440 | unsigned async_cnt, |
| 441 | pjsip_tpfactory **p_factory) |
| 442 | { |
| 443 | pjsip_tcp_transport_cfg cfg; |
| 444 | |
| 445 | pjsip_tcp_transport_cfg_default(&cfg, pj_AF_INET()); |
| 446 | |
| 447 | if (local) |
| 448 | pj_sockaddr_cp(&cfg.bind_addr, local); |
| 449 | else |
| 450 | pj_sockaddr_init(cfg.af, &cfg.bind_addr, NULL, 0); |
| 451 | |
| 452 | if (a_name) |
| 453 | pj_memcpy(&cfg.addr_name, a_name, sizeof(*a_name)); |
| 454 | |
| 455 | if (async_cnt) |
| 456 | cfg.async_cnt = async_cnt; |
| 457 | |
| 458 | return pjsip_tcp_transport_start3(endpt, &cfg, p_factory); |
| 459 | } |
| 460 | |
| 461 | |
| 462 | /* |
| 463 | * This is the public API to create, initialize, register, and start the |
| 464 | * TCP listener. |
| 465 | */ |
| 466 | PJ_DEF(pj_status_t) pjsip_tcp_transport_start( pjsip_endpoint *endpt, |
| 467 | const pj_sockaddr_in *local, |
| 468 | unsigned async_cnt, |
| 469 | pjsip_tpfactory **p_factory) |
| 470 | { |
| 471 | return pjsip_tcp_transport_start2(endpt, local, NULL, async_cnt, p_factory); |
| 472 | } |
| 473 | |
| 474 | |
| 475 | /* This callback is called by transport manager to destroy listener */ |
| 476 | static pj_status_t lis_destroy(pjsip_tpfactory *factory) |
| 477 | { |
| 478 | struct tcp_listener *listener = (struct tcp_listener *)factory; |
| 479 | |
| 480 | if (listener->is_registered) { |
| 481 | pjsip_tpmgr_unregister_tpfactory(listener->tpmgr, &listener->factory); |
| 482 | listener->is_registered = PJ_FALSE; |
| 483 | } |
| 484 | |
| 485 | if (listener->asock) { |
| 486 | pj_activesock_close(listener->asock); |
| 487 | listener->asock = NULL; |
| 488 | } |
| 489 | |
| 490 | if (listener->factory.lock) { |
| 491 | pj_lock_destroy(listener->factory.lock); |
| 492 | listener->factory.lock = NULL; |
| 493 | } |
| 494 | |
| 495 | if (listener->factory.pool) { |
| 496 | pj_pool_t *pool = listener->factory.pool; |
| 497 | |
| 498 | PJ_LOG(4,(listener->factory.obj_name, "SIP TCP listener destroyed")); |
| 499 | |
| 500 | listener->factory.pool = NULL; |
| 501 | pj_pool_release(pool); |
| 502 | } |
| 503 | |
| 504 | return PJ_SUCCESS; |
| 505 | } |
| 506 | |
| 507 | |
| 508 | /***************************************************************************/ |
| 509 | /* |
| 510 | * TCP Transport |
| 511 | */ |
| 512 | |
| 513 | /* |
| 514 | * Prototypes. |
| 515 | */ |
| 516 | /* Called by transport manager to send message */ |
| 517 | static pj_status_t tcp_send_msg(pjsip_transport *transport, |
| 518 | pjsip_tx_data *tdata, |
| 519 | const pj_sockaddr_t *rem_addr, |
| 520 | int addr_len, |
| 521 | void *token, |
| 522 | pjsip_transport_callback callback); |
| 523 | |
| 524 | /* Called by transport manager to shutdown */ |
| 525 | static pj_status_t tcp_shutdown(pjsip_transport *transport); |
| 526 | |
| 527 | /* Called by transport manager to destroy transport */ |
| 528 | static pj_status_t tcp_destroy_transport(pjsip_transport *transport); |
| 529 | |
| 530 | /* Utility to destroy transport */ |
| 531 | static pj_status_t tcp_destroy(pjsip_transport *transport, |
| 532 | pj_status_t reason); |
| 533 | |
| 534 | /* Callback on incoming data */ |
| 535 | static pj_bool_t on_data_read(pj_activesock_t *asock, |
| 536 | void *data, |
| 537 | pj_size_t size, |
| 538 | pj_status_t status, |
| 539 | pj_size_t *remainder); |
| 540 | |
| 541 | /* Callback when packet is sent */ |
| 542 | static pj_bool_t on_data_sent(pj_activesock_t *asock, |
| 543 | pj_ioqueue_op_key_t *send_key, |
| 544 | pj_ssize_t sent); |
| 545 | |
| 546 | /* Callback when connect completes */ |
| 547 | static pj_bool_t on_connect_complete(pj_activesock_t *asock, |
| 548 | pj_status_t status); |
| 549 | |
| 550 | /* TCP keep-alive timer callback */ |
| 551 | static void tcp_keep_alive_timer(pj_timer_heap_t *th, pj_timer_entry *e); |
| 552 | |
| 553 | /* |
| 554 | * Common function to create TCP transport, called when pending accept() and |
| 555 | * pending connect() complete. |
| 556 | */ |
| 557 | static pj_status_t tcp_create( struct tcp_listener *listener, |
| 558 | pj_pool_t *pool, |
| 559 | pj_sock_t sock, pj_bool_t is_server, |
| 560 | const pj_sockaddr *local, |
| 561 | const pj_sockaddr *remote, |
| 562 | struct tcp_transport **p_tcp) |
| 563 | { |
| 564 | struct tcp_transport *tcp; |
| 565 | pj_ioqueue_t *ioqueue; |
| 566 | pj_activesock_cfg asock_cfg; |
| 567 | pj_activesock_cb tcp_callback; |
| 568 | const pj_str_t ka_pkt = PJSIP_TCP_KEEP_ALIVE_DATA; |
| 569 | char print_addr[PJ_INET6_ADDRSTRLEN+10]; |
| 570 | pj_status_t status; |
| 571 | |
| 572 | |
| 573 | PJ_ASSERT_RETURN(sock != PJ_INVALID_SOCKET, PJ_EINVAL); |
| 574 | |
| 575 | |
| 576 | if (pool == NULL) { |
| 577 | pool = pjsip_endpt_create_pool(listener->endpt, "tcp", |
| 578 | POOL_TP_INIT, POOL_TP_INC); |
| 579 | PJ_ASSERT_RETURN(pool != NULL, PJ_ENOMEM); |
| 580 | } |
| 581 | |
| 582 | /* |
| 583 | * Create and initialize basic transport structure. |
| 584 | */ |
| 585 | tcp = PJ_POOL_ZALLOC_T(pool, struct tcp_transport); |
| 586 | tcp->is_server = is_server; |
| 587 | tcp->sock = sock; |
| 588 | /*tcp->listener = listener;*/ |
| 589 | pj_list_init(&tcp->delayed_list); |
| 590 | tcp->base.pool = pool; |
| 591 | |
| 592 | pj_ansi_snprintf(tcp->base.obj_name, PJ_MAX_OBJ_NAME, |
| 593 | (is_server ? "tcps%p" :"tcpc%p"), tcp); |
| 594 | |
| 595 | status = pj_atomic_create(pool, 0, &tcp->base.ref_cnt); |
| 596 | if (status != PJ_SUCCESS) { |
| 597 | goto on_error; |
| 598 | } |
| 599 | |
| 600 | status = pj_lock_create_recursive_mutex(pool, "tcp", &tcp->base.lock); |
| 601 | if (status != PJ_SUCCESS) { |
| 602 | goto on_error; |
| 603 | } |
| 604 | |
| 605 | tcp->base.key.type = listener->factory.type; |
| 606 | pj_sockaddr_cp(&tcp->base.key.rem_addr, remote); |
| 607 | tcp->base.type_name = (char*)pjsip_transport_get_type_name( |
| 608 | (pjsip_transport_type_e)tcp->base.key.type); |
| 609 | tcp->base.flag = pjsip_transport_get_flag_from_type( |
| 610 | (pjsip_transport_type_e)tcp->base.key.type); |
| 611 | |
| 612 | tcp->base.info = (char*) pj_pool_alloc(pool, 64); |
| 613 | pj_ansi_snprintf(tcp->base.info, 64, "%s to %s", |
| 614 | tcp->base.type_name, |
| 615 | pj_sockaddr_print(remote, print_addr, |
| 616 | sizeof(print_addr), 3)); |
| 617 | |
| 618 | tcp->base.addr_len = pj_sockaddr_get_len(remote); |
| 619 | pj_sockaddr_cp(&tcp->base.local_addr, local); |
| 620 | sockaddr_to_host_port(pool, &tcp->base.local_name, local); |
| 621 | sockaddr_to_host_port(pool, &tcp->base.remote_name, remote); |
| 622 | tcp->base.dir = is_server? PJSIP_TP_DIR_INCOMING : PJSIP_TP_DIR_OUTGOING; |
| 623 | |
| 624 | tcp->base.endpt = listener->endpt; |
| 625 | tcp->base.tpmgr = listener->tpmgr; |
| 626 | tcp->base.send_msg = &tcp_send_msg; |
| 627 | tcp->base.do_shutdown = &tcp_shutdown; |
| 628 | tcp->base.destroy = &tcp_destroy_transport; |
| 629 | |
| 630 | /* Create active socket */ |
| 631 | pj_activesock_cfg_default(&asock_cfg); |
| 632 | asock_cfg.async_cnt = 1; |
| 633 | |
| 634 | pj_bzero(&tcp_callback, sizeof(tcp_callback)); |
| 635 | tcp_callback.on_data_read = &on_data_read; |
| 636 | tcp_callback.on_data_sent = &on_data_sent; |
| 637 | tcp_callback.on_connect_complete = &on_connect_complete; |
| 638 | |
| 639 | ioqueue = pjsip_endpt_get_ioqueue(listener->endpt); |
| 640 | status = pj_activesock_create(pool, sock, pj_SOCK_STREAM(), &asock_cfg, |
| 641 | ioqueue, &tcp_callback, tcp, &tcp->asock); |
| 642 | if (status != PJ_SUCCESS) { |
| 643 | goto on_error; |
| 644 | } |
| 645 | |
| 646 | /* Register transport to transport manager */ |
| 647 | status = pjsip_transport_register(listener->tpmgr, &tcp->base); |
| 648 | if (status != PJ_SUCCESS) { |
| 649 | goto on_error; |
| 650 | } |
| 651 | |
| 652 | tcp->is_registered = PJ_TRUE; |
| 653 | |
| 654 | /* Initialize keep-alive timer */ |
| 655 | tcp->ka_timer.user_data = (void*)tcp; |
| 656 | tcp->ka_timer.cb = &tcp_keep_alive_timer; |
| 657 | pj_ioqueue_op_key_init(&tcp->ka_op_key.key, sizeof(pj_ioqueue_op_key_t)); |
| 658 | pj_strdup(tcp->base.pool, &tcp->ka_pkt, &ka_pkt); |
| 659 | |
| 660 | /* Done setting up basic transport. */ |
| 661 | *p_tcp = tcp; |
| 662 | |
| 663 | PJ_LOG(4,(tcp->base.obj_name, "TCP %s transport created", |
| 664 | (tcp->is_server ? "server" : "client"))); |
| 665 | |
| 666 | return PJ_SUCCESS; |
| 667 | |
| 668 | on_error: |
| 669 | tcp_destroy(&tcp->base, status); |
| 670 | return status; |
| 671 | } |
| 672 | |
| 673 | |
| 674 | /* Flush all delayed transmision once the socket is connected. */ |
| 675 | static void tcp_flush_pending_tx(struct tcp_transport *tcp) |
| 676 | { |
| 677 | pj_time_val now; |
| 678 | |
| 679 | pj_gettickcount(&now); |
| 680 | pj_lock_acquire(tcp->base.lock); |
| 681 | while (!pj_list_empty(&tcp->delayed_list)) { |
| 682 | struct delayed_tdata *pending_tx; |
| 683 | pjsip_tx_data *tdata; |
| 684 | pj_ioqueue_op_key_t *op_key; |
| 685 | pj_ssize_t size; |
| 686 | pj_status_t status; |
| 687 | |
| 688 | pending_tx = tcp->delayed_list.next; |
| 689 | pj_list_erase(pending_tx); |
| 690 | |
| 691 | tdata = pending_tx->tdata_op_key->tdata; |
| 692 | op_key = (pj_ioqueue_op_key_t*)pending_tx->tdata_op_key; |
| 693 | |
| 694 | if (pending_tx->timeout.sec > 0 && |
| 695 | PJ_TIME_VAL_GT(now, pending_tx->timeout)) |
| 696 | { |
| 697 | continue; |
| 698 | } |
| 699 | |
| 700 | /* send! */ |
| 701 | size = tdata->buf.cur - tdata->buf.start; |
| 702 | status = pj_activesock_send(tcp->asock, op_key, tdata->buf.start, |
| 703 | &size, 0); |
| 704 | if (status != PJ_EPENDING) { |
| 705 | pj_lock_release(tcp->base.lock); |
| 706 | on_data_sent(tcp->asock, op_key, size); |
| 707 | pj_lock_acquire(tcp->base.lock); |
| 708 | } |
| 709 | |
| 710 | } |
| 711 | pj_lock_release(tcp->base.lock); |
| 712 | } |
| 713 | |
| 714 | |
| 715 | /* Called by transport manager to destroy transport */ |
| 716 | static pj_status_t tcp_destroy_transport(pjsip_transport *transport) |
| 717 | { |
| 718 | struct tcp_transport *tcp = (struct tcp_transport*)transport; |
| 719 | |
| 720 | /* Transport would have been unregistered by now since this callback |
| 721 | * is called by transport manager. |
| 722 | */ |
| 723 | tcp->is_registered = PJ_FALSE; |
| 724 | |
| 725 | return tcp_destroy(transport, tcp->close_reason); |
| 726 | } |
| 727 | |
| 728 | |
| 729 | /* Destroy TCP transport */ |
| 730 | static pj_status_t tcp_destroy(pjsip_transport *transport, |
| 731 | pj_status_t reason) |
| 732 | { |
| 733 | struct tcp_transport *tcp = (struct tcp_transport*)transport; |
| 734 | |
| 735 | if (tcp->close_reason == 0) |
| 736 | tcp->close_reason = reason; |
| 737 | |
| 738 | if (tcp->is_registered) { |
| 739 | tcp->is_registered = PJ_FALSE; |
| 740 | pjsip_transport_destroy(transport); |
| 741 | |
| 742 | /* pjsip_transport_destroy will recursively call this function |
| 743 | * again. |
| 744 | */ |
| 745 | return PJ_SUCCESS; |
| 746 | } |
| 747 | |
| 748 | /* Mark transport as closing */ |
| 749 | tcp->is_closing = PJ_TRUE; |
| 750 | |
| 751 | /* Stop keep-alive timer. */ |
| 752 | if (tcp->ka_timer.id) { |
| 753 | pjsip_endpt_cancel_timer(tcp->base.endpt, &tcp->ka_timer); |
| 754 | tcp->ka_timer.id = PJ_FALSE; |
| 755 | } |
| 756 | |
| 757 | /* Cancel all delayed transmits */ |
| 758 | while (!pj_list_empty(&tcp->delayed_list)) { |
| 759 | struct delayed_tdata *pending_tx; |
| 760 | pj_ioqueue_op_key_t *op_key; |
| 761 | |
| 762 | pending_tx = tcp->delayed_list.next; |
| 763 | pj_list_erase(pending_tx); |
| 764 | |
| 765 | op_key = (pj_ioqueue_op_key_t*)pending_tx->tdata_op_key; |
| 766 | |
| 767 | on_data_sent(tcp->asock, op_key, -reason); |
| 768 | } |
| 769 | |
| 770 | if (tcp->rdata.tp_info.pool) { |
| 771 | pj_pool_release(tcp->rdata.tp_info.pool); |
| 772 | tcp->rdata.tp_info.pool = NULL; |
| 773 | } |
| 774 | |
| 775 | if (tcp->asock) { |
| 776 | pj_activesock_close(tcp->asock); |
| 777 | tcp->asock = NULL; |
| 778 | tcp->sock = PJ_INVALID_SOCKET; |
| 779 | } else if (tcp->sock != PJ_INVALID_SOCKET) { |
| 780 | pj_sock_close(tcp->sock); |
| 781 | tcp->sock = PJ_INVALID_SOCKET; |
| 782 | } |
| 783 | |
| 784 | if (tcp->base.lock) { |
| 785 | pj_lock_destroy(tcp->base.lock); |
| 786 | tcp->base.lock = NULL; |
| 787 | } |
| 788 | |
| 789 | if (tcp->base.ref_cnt) { |
| 790 | pj_atomic_destroy(tcp->base.ref_cnt); |
| 791 | tcp->base.ref_cnt = NULL; |
| 792 | } |
| 793 | |
| 794 | if (tcp->base.pool) { |
| 795 | pj_pool_t *pool; |
| 796 | |
| 797 | if (reason != PJ_SUCCESS) { |
| 798 | char errmsg[PJ_ERR_MSG_SIZE]; |
| 799 | |
| 800 | pj_strerror(reason, errmsg, sizeof(errmsg)); |
| 801 | PJ_LOG(4,(tcp->base.obj_name, |
| 802 | "TCP transport destroyed with reason %d: %s", |
| 803 | reason, errmsg)); |
| 804 | |
| 805 | } else { |
| 806 | |
| 807 | PJ_LOG(4,(tcp->base.obj_name, |
| 808 | "TCP transport destroyed normally")); |
| 809 | |
| 810 | } |
| 811 | |
| 812 | pool = tcp->base.pool; |
| 813 | tcp->base.pool = NULL; |
| 814 | pj_pool_release(pool); |
| 815 | } |
| 816 | |
| 817 | return PJ_SUCCESS; |
| 818 | } |
| 819 | |
| 820 | |
| 821 | /* |
| 822 | * This utility function creates receive data buffers and start |
| 823 | * asynchronous recv() operations from the socket. It is called after |
| 824 | * accept() or connect() operation complete. |
| 825 | */ |
| 826 | static pj_status_t tcp_start_read(struct tcp_transport *tcp) |
| 827 | { |
| 828 | pj_pool_t *pool; |
| 829 | pj_uint32_t size; |
| 830 | pj_sockaddr *rem_addr; |
| 831 | void *readbuf[1]; |
| 832 | pj_status_t status; |
| 833 | |
| 834 | /* Init rdata */ |
| 835 | pool = pjsip_endpt_create_pool(tcp->base.endpt, |
| 836 | "rtd%p", |
| 837 | PJSIP_POOL_RDATA_LEN, |
| 838 | PJSIP_POOL_RDATA_INC); |
| 839 | if (!pool) { |
| 840 | tcp_perror(tcp->base.obj_name, "Unable to create pool", PJ_ENOMEM); |
| 841 | return PJ_ENOMEM; |
| 842 | } |
| 843 | |
| 844 | tcp->rdata.tp_info.pool = pool; |
| 845 | |
| 846 | tcp->rdata.tp_info.transport = &tcp->base; |
| 847 | tcp->rdata.tp_info.tp_data = tcp; |
| 848 | tcp->rdata.tp_info.op_key.rdata = &tcp->rdata; |
| 849 | pj_ioqueue_op_key_init(&tcp->rdata.tp_info.op_key.op_key, |
| 850 | sizeof(pj_ioqueue_op_key_t)); |
| 851 | |
| 852 | tcp->rdata.pkt_info.src_addr = tcp->base.key.rem_addr; |
| 853 | tcp->rdata.pkt_info.src_addr_len = sizeof(tcp->rdata.pkt_info.src_addr); |
| 854 | rem_addr = &tcp->base.key.rem_addr; |
| 855 | pj_sockaddr_print(rem_addr, tcp->rdata.pkt_info.src_name, |
| 856 | sizeof(tcp->rdata.pkt_info.src_name), 0); |
| 857 | tcp->rdata.pkt_info.src_port = pj_sockaddr_get_port(rem_addr); |
| 858 | |
| 859 | size = sizeof(tcp->rdata.pkt_info.packet); |
| 860 | readbuf[0] = tcp->rdata.pkt_info.packet; |
| 861 | status = pj_activesock_start_read2(tcp->asock, tcp->base.pool, size, |
| 862 | readbuf, 0); |
| 863 | if (status != PJ_SUCCESS && status != PJ_EPENDING) { |
| 864 | PJ_LOG(4, (tcp->base.obj_name, |
| 865 | "pj_activesock_start_read() error, status=%d", |
| 866 | status)); |
| 867 | return status; |
| 868 | } |
| 869 | |
| 870 | return PJ_SUCCESS; |
| 871 | } |
| 872 | |
| 873 | |
| 874 | /* This callback is called by transport manager for the TCP factory |
| 875 | * to create outgoing transport to the specified destination. |
| 876 | */ |
| 877 | static pj_status_t lis_create_transport(pjsip_tpfactory *factory, |
| 878 | pjsip_tpmgr *mgr, |
| 879 | pjsip_endpoint *endpt, |
| 880 | const pj_sockaddr *rem_addr, |
| 881 | int addr_len, |
| 882 | pjsip_transport **p_transport) |
| 883 | { |
| 884 | struct tcp_listener *listener; |
| 885 | struct tcp_transport *tcp; |
| 886 | pj_sock_t sock; |
| 887 | pj_sockaddr local_addr; |
| 888 | pj_status_t status; |
| 889 | |
| 890 | /* Sanity checks */ |
| 891 | PJ_ASSERT_RETURN(factory && mgr && endpt && rem_addr && |
| 892 | addr_len && p_transport, PJ_EINVAL); |
| 893 | |
| 894 | /* Check that address is a sockaddr_in or sockaddr_in6*/ |
| 895 | PJ_ASSERT_RETURN((rem_addr->addr.sa_family == pj_AF_INET() && |
| 896 | addr_len == sizeof(pj_sockaddr_in)) || |
| 897 | (rem_addr->addr.sa_family == pj_AF_INET6() && |
| 898 | addr_len == sizeof(pj_sockaddr_in6)), PJ_EINVAL); |
| 899 | |
| 900 | |
| 901 | listener = (struct tcp_listener*)factory; |
| 902 | |
| 903 | /* Create socket */ |
| 904 | status = pj_sock_socket(rem_addr->addr.sa_family, pj_SOCK_STREAM(), |
| 905 | 0, &sock); |
| 906 | if (status != PJ_SUCCESS) |
| 907 | return status; |
| 908 | |
| 909 | /* Apply QoS, if specified */ |
| 910 | status = pj_sock_apply_qos2(sock, listener->qos_type, |
| 911 | &listener->qos_params, |
| 912 | 2, listener->factory.obj_name, |
| 913 | "outgoing SIP TCP socket"); |
| 914 | |
| 915 | /* Bind to listener's address and any port */ |
| 916 | pj_bzero(&local_addr, sizeof(local_addr)); |
| 917 | pj_sockaddr_cp(&local_addr, &listener->bound_addr); |
| 918 | pj_sockaddr_set_port(&local_addr, 0); |
| 919 | |
| 920 | status = pj_sock_bind(sock, &local_addr, |
| 921 | pj_sockaddr_get_len(&local_addr)); |
| 922 | if (status != PJ_SUCCESS) { |
| 923 | pj_sock_close(sock); |
| 924 | return status; |
| 925 | } |
| 926 | |
| 927 | /* Get the local port */ |
| 928 | addr_len = sizeof(local_addr); |
| 929 | status = pj_sock_getsockname(sock, &local_addr, &addr_len); |
| 930 | if (status != PJ_SUCCESS) { |
| 931 | pj_sock_close(sock); |
| 932 | return status; |
| 933 | } |
| 934 | |
| 935 | /* Initially set the address from the listener's address */ |
| 936 | if (!pj_sockaddr_has_addr(&local_addr)) { |
| 937 | pj_sockaddr_copy_addr(&local_addr, &listener->factory.local_addr); |
| 938 | } |
| 939 | |
| 940 | /* Create the transport descriptor */ |
| 941 | status = tcp_create(listener, NULL, sock, PJ_FALSE, &local_addr, |
| 942 | rem_addr, &tcp); |
| 943 | if (status != PJ_SUCCESS) |
| 944 | return status; |
| 945 | |
| 946 | |
| 947 | /* Start asynchronous connect() operation */ |
| 948 | tcp->has_pending_connect = PJ_TRUE; |
| 949 | status = pj_activesock_start_connect(tcp->asock, tcp->base.pool, rem_addr, |
| 950 | addr_len); |
| 951 | if (status == PJ_SUCCESS) { |
| 952 | on_connect_complete(tcp->asock, PJ_SUCCESS); |
| 953 | } else if (status != PJ_EPENDING) { |
| 954 | tcp_destroy(&tcp->base, status); |
| 955 | return status; |
| 956 | } |
| 957 | |
| 958 | if (tcp->has_pending_connect) { |
| 959 | /* Update (again) local address, just in case local address currently |
| 960 | * set is different now that asynchronous connect() is started. |
| 961 | */ |
| 962 | addr_len = sizeof(local_addr); |
| 963 | if (pj_sock_getsockname(sock, &local_addr, &addr_len)==PJ_SUCCESS) { |
| 964 | pj_sockaddr *tp_addr = &tcp->base.local_addr; |
| 965 | |
| 966 | /* Some systems (like old Win32 perhaps) may not set local address |
| 967 | * properly before socket is fully connected. |
| 968 | */ |
| 969 | if (pj_sockaddr_cmp(tp_addr, &local_addr) && |
| 970 | pj_sockaddr_has_addr(&local_addr) && |
| 971 | pj_sockaddr_get_port(&local_addr) != 0) |
| 972 | { |
| 973 | pj_sockaddr_cp(tp_addr, &local_addr); |
| 974 | sockaddr_to_host_port(tcp->base.pool, &tcp->base.local_name, |
| 975 | &local_addr); |
| 976 | } |
| 977 | } |
| 978 | |
| 979 | PJ_LOG(4,(tcp->base.obj_name, |
| 980 | "TCP transport %.*s:%d is connecting to %.*s:%d...", |
| 981 | (int)tcp->base.local_name.host.slen, |
| 982 | tcp->base.local_name.host.ptr, |
| 983 | tcp->base.local_name.port, |
| 984 | (int)tcp->base.remote_name.host.slen, |
| 985 | tcp->base.remote_name.host.ptr, |
| 986 | tcp->base.remote_name.port)); |
| 987 | } |
| 988 | |
| 989 | /* Done */ |
| 990 | *p_transport = &tcp->base; |
| 991 | |
| 992 | return PJ_SUCCESS; |
| 993 | } |
| 994 | |
| 995 | |
| 996 | /* |
| 997 | * This callback is called by active socket when pending accept() operation |
| 998 | * has completed. |
| 999 | */ |
| 1000 | static pj_bool_t on_accept_complete(pj_activesock_t *asock, |
| 1001 | pj_sock_t sock, |
| 1002 | const pj_sockaddr_t *src_addr, |
| 1003 | int src_addr_len) |
| 1004 | { |
| 1005 | struct tcp_listener *listener; |
| 1006 | struct tcp_transport *tcp; |
| 1007 | char addr[PJ_INET6_ADDRSTRLEN+10]; |
| 1008 | pjsip_tp_state_callback state_cb; |
| 1009 | pj_sockaddr tmp_src_addr; |
| 1010 | pj_status_t status; |
| 1011 | |
| 1012 | PJ_UNUSED_ARG(src_addr_len); |
| 1013 | |
| 1014 | listener = (struct tcp_listener*) pj_activesock_get_user_data(asock); |
| 1015 | |
| 1016 | PJ_ASSERT_RETURN(sock != PJ_INVALID_SOCKET, PJ_TRUE); |
| 1017 | |
| 1018 | PJ_LOG(4,(listener->factory.obj_name, |
| 1019 | "TCP listener %.*s:%d: got incoming TCP connection " |
| 1020 | "from %s, sock=%d", |
| 1021 | (int)listener->factory.addr_name.host.slen, |
| 1022 | listener->factory.addr_name.host.ptr, |
| 1023 | listener->factory.addr_name.port, |
| 1024 | pj_sockaddr_print(src_addr, addr, sizeof(addr), 3), |
| 1025 | sock)); |
| 1026 | |
| 1027 | /* Apply QoS, if specified */ |
| 1028 | status = pj_sock_apply_qos2(sock, listener->qos_type, |
| 1029 | &listener->qos_params, |
| 1030 | 2, listener->factory.obj_name, |
| 1031 | "incoming SIP TCP socket"); |
| 1032 | |
| 1033 | /* tcp_create() expect pj_sockaddr, so copy src_addr to temporary var, |
| 1034 | * just in case. |
| 1035 | */ |
| 1036 | pj_bzero(&tmp_src_addr, sizeof(tmp_src_addr)); |
| 1037 | pj_sockaddr_cp(&tmp_src_addr, src_addr); |
| 1038 | |
| 1039 | /* |
| 1040 | * Incoming connection! |
| 1041 | * Create TCP transport for the new socket. |
| 1042 | */ |
| 1043 | status = tcp_create( listener, NULL, sock, PJ_TRUE, |
| 1044 | &listener->factory.local_addr, |
| 1045 | &tmp_src_addr, &tcp); |
| 1046 | if (status == PJ_SUCCESS) { |
| 1047 | status = tcp_start_read(tcp); |
| 1048 | if (status != PJ_SUCCESS) { |
| 1049 | PJ_LOG(3,(tcp->base.obj_name, "New transport cancelled")); |
| 1050 | tcp_destroy(&tcp->base, status); |
| 1051 | } else { |
| 1052 | /* Start keep-alive timer */ |
| 1053 | if (PJSIP_TCP_KEEP_ALIVE_INTERVAL) { |
| 1054 | pj_time_val delay = {PJSIP_TCP_KEEP_ALIVE_INTERVAL, 0}; |
| 1055 | pjsip_endpt_schedule_timer(listener->endpt, |
| 1056 | &tcp->ka_timer, |
| 1057 | &delay); |
| 1058 | tcp->ka_timer.id = PJ_TRUE; |
| 1059 | pj_gettimeofday(&tcp->last_activity); |
| 1060 | } |
| 1061 | |
| 1062 | /* Notify application of transport state accepted */ |
| 1063 | state_cb = pjsip_tpmgr_get_state_cb(tcp->base.tpmgr); |
| 1064 | if (state_cb) { |
| 1065 | pjsip_transport_state_info state_info; |
| 1066 | |
| 1067 | pj_bzero(&state_info, sizeof(state_info)); |
| 1068 | (*state_cb)(&tcp->base, PJSIP_TP_STATE_CONNECTED, &state_info); |
| 1069 | } |
| 1070 | } |
| 1071 | } |
| 1072 | |
| 1073 | return PJ_TRUE; |
| 1074 | } |
| 1075 | |
| 1076 | |
| 1077 | /* |
| 1078 | * Callback from ioqueue when packet is sent. |
| 1079 | */ |
| 1080 | static pj_bool_t on_data_sent(pj_activesock_t *asock, |
| 1081 | pj_ioqueue_op_key_t *op_key, |
| 1082 | pj_ssize_t bytes_sent) |
| 1083 | { |
| 1084 | struct tcp_transport *tcp = (struct tcp_transport*) |
| 1085 | pj_activesock_get_user_data(asock); |
| 1086 | pjsip_tx_data_op_key *tdata_op_key = (pjsip_tx_data_op_key*)op_key; |
| 1087 | |
| 1088 | /* Note that op_key may be the op_key from keep-alive, thus |
| 1089 | * it will not have tdata etc. |
| 1090 | */ |
| 1091 | |
| 1092 | tdata_op_key->tdata = NULL; |
| 1093 | |
| 1094 | if (tdata_op_key->callback) { |
| 1095 | /* |
| 1096 | * Notify sip_transport.c that packet has been sent. |
| 1097 | */ |
| 1098 | if (bytes_sent == 0) |
| 1099 | bytes_sent = -PJ_RETURN_OS_ERROR(OSERR_ENOTCONN); |
| 1100 | |
| 1101 | tdata_op_key->callback(&tcp->base, tdata_op_key->token, bytes_sent); |
| 1102 | |
| 1103 | /* Mark last activity time */ |
| 1104 | pj_gettimeofday(&tcp->last_activity); |
| 1105 | |
| 1106 | } |
| 1107 | |
| 1108 | /* Check for error/closure */ |
| 1109 | if (bytes_sent <= 0) { |
| 1110 | pj_status_t status; |
| 1111 | |
| 1112 | PJ_LOG(5,(tcp->base.obj_name, "TCP send() error, sent=%d", |
| 1113 | bytes_sent)); |
| 1114 | |
| 1115 | status = (bytes_sent == 0) ? PJ_RETURN_OS_ERROR(OSERR_ENOTCONN) : |
| 1116 | (pj_status_t)-bytes_sent; |
| 1117 | |
| 1118 | tcp_init_shutdown(tcp, status); |
| 1119 | |
| 1120 | return PJ_FALSE; |
| 1121 | } |
| 1122 | |
| 1123 | return PJ_TRUE; |
| 1124 | } |
| 1125 | |
| 1126 | |
| 1127 | /* |
| 1128 | * This callback is called by transport manager to send SIP message |
| 1129 | */ |
| 1130 | static pj_status_t tcp_send_msg(pjsip_transport *transport, |
| 1131 | pjsip_tx_data *tdata, |
| 1132 | const pj_sockaddr_t *rem_addr, |
| 1133 | int addr_len, |
| 1134 | void *token, |
| 1135 | pjsip_transport_callback callback) |
| 1136 | { |
| 1137 | struct tcp_transport *tcp = (struct tcp_transport*)transport; |
| 1138 | pj_ssize_t size; |
| 1139 | pj_bool_t delayed = PJ_FALSE; |
| 1140 | pj_status_t status = PJ_SUCCESS; |
| 1141 | |
| 1142 | /* Sanity check */ |
| 1143 | PJ_ASSERT_RETURN(transport && tdata, PJ_EINVAL); |
| 1144 | |
| 1145 | /* Check that there's no pending operation associated with the tdata */ |
| 1146 | PJ_ASSERT_RETURN(tdata->op_key.tdata == NULL, PJSIP_EPENDINGTX); |
| 1147 | |
| 1148 | /* Check the address is supported */ |
| 1149 | PJ_ASSERT_RETURN(rem_addr && (addr_len==sizeof(pj_sockaddr_in) || |
| 1150 | addr_len==sizeof(pj_sockaddr_in6)), |
| 1151 | PJ_EINVAL); |
| 1152 | |
| 1153 | /* Init op key. */ |
| 1154 | tdata->op_key.tdata = tdata; |
| 1155 | tdata->op_key.token = token; |
| 1156 | tdata->op_key.callback = callback; |
| 1157 | |
| 1158 | /* If asynchronous connect() has not completed yet, just put the |
| 1159 | * transmit data in the pending transmission list since we can not |
| 1160 | * use the socket yet. |
| 1161 | */ |
| 1162 | if (tcp->has_pending_connect) { |
| 1163 | |
| 1164 | /* |
| 1165 | * Looks like connect() is still in progress. Check again (this time |
| 1166 | * with holding the lock) to be sure. |
| 1167 | */ |
| 1168 | pj_lock_acquire(tcp->base.lock); |
| 1169 | |
| 1170 | if (tcp->has_pending_connect) { |
| 1171 | struct delayed_tdata *delayed_tdata; |
| 1172 | |
| 1173 | /* |
| 1174 | * connect() is still in progress. Put the transmit data to |
| 1175 | * the delayed list. |
| 1176 | * Starting from #1583 (https://trac.pjsip.org/repos/ticket/1583), |
| 1177 | * we also add timeout value for the transmit data. When the |
| 1178 | * connect() is completed, the timeout value will be checked to |
| 1179 | * determine whether the transmit data needs to be sent. |
| 1180 | */ |
| 1181 | delayed_tdata = PJ_POOL_ZALLOC_T(tdata->pool, |
| 1182 | struct delayed_tdata); |
| 1183 | delayed_tdata->tdata_op_key = &tdata->op_key; |
| 1184 | if (tdata->msg && tdata->msg->type == PJSIP_REQUEST_MSG) { |
| 1185 | pj_gettickcount(&delayed_tdata->timeout); |
| 1186 | delayed_tdata->timeout.msec += pjsip_cfg()->tsx.td; |
| 1187 | pj_time_val_normalize(&delayed_tdata->timeout); |
| 1188 | } |
| 1189 | |
| 1190 | pj_list_push_back(&tcp->delayed_list, delayed_tdata); |
| 1191 | status = PJ_EPENDING; |
| 1192 | |
| 1193 | /* Prevent pj_ioqueue_send() to be called below */ |
| 1194 | delayed = PJ_TRUE; |
| 1195 | } |
| 1196 | |
| 1197 | pj_lock_release(tcp->base.lock); |
| 1198 | } |
| 1199 | |
| 1200 | if (!delayed) { |
| 1201 | /* |
| 1202 | * Transport is ready to go. Send the packet to ioqueue to be |
| 1203 | * sent asynchronously. |
| 1204 | */ |
| 1205 | size = tdata->buf.cur - tdata->buf.start; |
| 1206 | status = pj_activesock_send(tcp->asock, |
| 1207 | (pj_ioqueue_op_key_t*)&tdata->op_key, |
| 1208 | tdata->buf.start, &size, 0); |
| 1209 | |
| 1210 | if (status != PJ_EPENDING) { |
| 1211 | /* Not pending (could be immediate success or error) */ |
| 1212 | tdata->op_key.tdata = NULL; |
| 1213 | |
| 1214 | /* Shutdown transport on closure/errors */ |
| 1215 | if (size <= 0) { |
| 1216 | |
| 1217 | PJ_LOG(5,(tcp->base.obj_name, "TCP send() error, sent=%d", |
| 1218 | size)); |
| 1219 | |
| 1220 | if (status == PJ_SUCCESS) |
| 1221 | status = PJ_RETURN_OS_ERROR(OSERR_ENOTCONN); |
| 1222 | |
| 1223 | tcp_init_shutdown(tcp, status); |
| 1224 | } |
| 1225 | } |
| 1226 | } |
| 1227 | |
| 1228 | return status; |
| 1229 | } |
| 1230 | |
| 1231 | |
| 1232 | /* |
| 1233 | * This callback is called by transport manager to shutdown transport. |
| 1234 | */ |
| 1235 | static pj_status_t tcp_shutdown(pjsip_transport *transport) |
| 1236 | { |
| 1237 | struct tcp_transport *tcp = (struct tcp_transport*)transport; |
| 1238 | |
| 1239 | /* Stop keep-alive timer. */ |
| 1240 | if (tcp->ka_timer.id) { |
| 1241 | pjsip_endpt_cancel_timer(tcp->base.endpt, &tcp->ka_timer); |
| 1242 | tcp->ka_timer.id = PJ_FALSE; |
| 1243 | } |
| 1244 | |
| 1245 | return PJ_SUCCESS; |
| 1246 | } |
| 1247 | |
| 1248 | |
| 1249 | /* |
| 1250 | * Callback from ioqueue that an incoming data is received from the socket. |
| 1251 | */ |
| 1252 | static pj_bool_t on_data_read(pj_activesock_t *asock, |
| 1253 | void *data, |
| 1254 | pj_size_t size, |
| 1255 | pj_status_t status, |
| 1256 | pj_size_t *remainder) |
| 1257 | { |
| 1258 | enum { MAX_IMMEDIATE_PACKET = 10 }; |
| 1259 | struct tcp_transport *tcp; |
| 1260 | pjsip_rx_data *rdata; |
| 1261 | |
| 1262 | PJ_UNUSED_ARG(data); |
| 1263 | |
| 1264 | tcp = (struct tcp_transport*) pj_activesock_get_user_data(asock); |
| 1265 | rdata = &tcp->rdata; |
| 1266 | |
| 1267 | /* Don't do anything if transport is closing. */ |
| 1268 | if (tcp->is_closing) { |
| 1269 | tcp->is_closing++; |
| 1270 | return PJ_FALSE; |
| 1271 | } |
| 1272 | |
| 1273 | /* Houston, we have packet! Report the packet to transport manager |
| 1274 | * to be parsed. |
| 1275 | */ |
| 1276 | if (status == PJ_SUCCESS) { |
| 1277 | pj_size_t size_eaten; |
| 1278 | |
| 1279 | /* Mark this as an activity */ |
| 1280 | pj_gettimeofday(&tcp->last_activity); |
| 1281 | |
| 1282 | pj_assert((void*)rdata->pkt_info.packet == data); |
| 1283 | |
| 1284 | /* Init pkt_info part. */ |
| 1285 | rdata->pkt_info.len = size; |
| 1286 | rdata->pkt_info.zero = 0; |
| 1287 | pj_gettimeofday(&rdata->pkt_info.timestamp); |
| 1288 | |
| 1289 | /* Report to transport manager. |
| 1290 | * The transport manager will tell us how many bytes of the packet |
| 1291 | * have been processed (as valid SIP message). |
| 1292 | */ |
| 1293 | size_eaten = |
| 1294 | pjsip_tpmgr_receive_packet(rdata->tp_info.transport->tpmgr, |
| 1295 | rdata); |
| 1296 | |
| 1297 | pj_assert(size_eaten <= (pj_size_t)rdata->pkt_info.len); |
| 1298 | |
| 1299 | /* Move unprocessed data to the front of the buffer */ |
| 1300 | *remainder = size - size_eaten; |
| 1301 | if (*remainder > 0 && *remainder != size) { |
| 1302 | pj_memmove(rdata->pkt_info.packet, |
| 1303 | rdata->pkt_info.packet + size_eaten, |
| 1304 | *remainder); |
| 1305 | } |
| 1306 | |
| 1307 | } else { |
| 1308 | |
| 1309 | /* Transport is closed */ |
| 1310 | PJ_LOG(4,(tcp->base.obj_name, "TCP connection closed")); |
| 1311 | |
| 1312 | tcp_init_shutdown(tcp, status); |
| 1313 | |
| 1314 | return PJ_FALSE; |
| 1315 | |
| 1316 | } |
| 1317 | |
| 1318 | /* Reset pool. */ |
| 1319 | pj_pool_reset(rdata->tp_info.pool); |
| 1320 | |
| 1321 | return PJ_TRUE; |
| 1322 | } |
| 1323 | |
| 1324 | |
| 1325 | /* |
| 1326 | * Callback from ioqueue when asynchronous connect() operation completes. |
| 1327 | */ |
| 1328 | static pj_bool_t on_connect_complete(pj_activesock_t *asock, |
| 1329 | pj_status_t status) |
| 1330 | { |
| 1331 | struct tcp_transport *tcp; |
| 1332 | pj_sockaddr addr; |
| 1333 | int addrlen; |
| 1334 | pjsip_tp_state_callback state_cb; |
| 1335 | |
| 1336 | tcp = (struct tcp_transport*) pj_activesock_get_user_data(asock); |
| 1337 | |
| 1338 | /* Mark that pending connect() operation has completed. */ |
| 1339 | tcp->has_pending_connect = PJ_FALSE; |
| 1340 | |
| 1341 | /* Check connect() status */ |
| 1342 | if (status != PJ_SUCCESS) { |
| 1343 | |
| 1344 | tcp_perror(tcp->base.obj_name, "TCP connect() error", status); |
| 1345 | |
| 1346 | /* Cancel all delayed transmits */ |
| 1347 | while (!pj_list_empty(&tcp->delayed_list)) { |
| 1348 | struct delayed_tdata *pending_tx; |
| 1349 | pj_ioqueue_op_key_t *op_key; |
| 1350 | |
| 1351 | pending_tx = tcp->delayed_list.next; |
| 1352 | pj_list_erase(pending_tx); |
| 1353 | |
| 1354 | op_key = (pj_ioqueue_op_key_t*)pending_tx->tdata_op_key; |
| 1355 | |
| 1356 | on_data_sent(tcp->asock, op_key, -status); |
| 1357 | } |
| 1358 | |
| 1359 | tcp_init_shutdown(tcp, status); |
| 1360 | return PJ_FALSE; |
| 1361 | } |
| 1362 | |
| 1363 | PJ_LOG(4,(tcp->base.obj_name, |
| 1364 | "TCP transport %.*s:%d is connected to %.*s:%d", |
| 1365 | (int)tcp->base.local_name.host.slen, |
| 1366 | tcp->base.local_name.host.ptr, |
| 1367 | tcp->base.local_name.port, |
| 1368 | (int)tcp->base.remote_name.host.slen, |
| 1369 | tcp->base.remote_name.host.ptr, |
| 1370 | tcp->base.remote_name.port)); |
| 1371 | |
| 1372 | |
| 1373 | /* Update (again) local address, just in case local address currently |
| 1374 | * set is different now that the socket is connected (could happen |
| 1375 | * on some systems, like old Win32 probably?). |
| 1376 | */ |
| 1377 | addrlen = sizeof(addr); |
| 1378 | if (pj_sock_getsockname(tcp->sock, &addr, &addrlen)==PJ_SUCCESS) { |
| 1379 | pj_sockaddr *tp_addr = &tcp->base.local_addr; |
| 1380 | |
| 1381 | if (pj_sockaddr_has_addr(&addr) && |
| 1382 | pj_sockaddr_cmp(&addr, tp_addr) != 0) |
| 1383 | { |
| 1384 | pj_sockaddr_cp(tp_addr, &addr); |
| 1385 | sockaddr_to_host_port(tcp->base.pool, &tcp->base.local_name, |
| 1386 | tp_addr); |
| 1387 | } |
| 1388 | } |
| 1389 | |
| 1390 | /* Start pending read */ |
| 1391 | status = tcp_start_read(tcp); |
| 1392 | if (status != PJ_SUCCESS) { |
| 1393 | tcp_init_shutdown(tcp, status); |
| 1394 | return PJ_FALSE; |
| 1395 | } |
| 1396 | |
| 1397 | /* Notify application of transport state connected */ |
| 1398 | state_cb = pjsip_tpmgr_get_state_cb(tcp->base.tpmgr); |
| 1399 | if (state_cb) { |
| 1400 | pjsip_transport_state_info state_info; |
| 1401 | |
| 1402 | pj_bzero(&state_info, sizeof(state_info)); |
| 1403 | (*state_cb)(&tcp->base, PJSIP_TP_STATE_CONNECTED, &state_info); |
| 1404 | } |
| 1405 | |
| 1406 | /* Flush all pending send operations */ |
| 1407 | tcp_flush_pending_tx(tcp); |
| 1408 | |
| 1409 | /* Start keep-alive timer */ |
| 1410 | if (PJSIP_TCP_KEEP_ALIVE_INTERVAL) { |
| 1411 | pj_time_val delay = { PJSIP_TCP_KEEP_ALIVE_INTERVAL, 0 }; |
| 1412 | pjsip_endpt_schedule_timer(tcp->base.endpt, &tcp->ka_timer, |
| 1413 | &delay); |
| 1414 | tcp->ka_timer.id = PJ_TRUE; |
| 1415 | pj_gettimeofday(&tcp->last_activity); |
| 1416 | } |
| 1417 | |
| 1418 | return PJ_TRUE; |
| 1419 | } |
| 1420 | |
| 1421 | /* Transport keep-alive timer callback */ |
| 1422 | static void tcp_keep_alive_timer(pj_timer_heap_t *th, pj_timer_entry *e) |
| 1423 | { |
| 1424 | struct tcp_transport *tcp = (struct tcp_transport*) e->user_data; |
| 1425 | pj_time_val delay; |
| 1426 | pj_time_val now; |
| 1427 | pj_ssize_t size; |
| 1428 | pj_status_t status; |
| 1429 | |
| 1430 | PJ_UNUSED_ARG(th); |
| 1431 | |
| 1432 | tcp->ka_timer.id = PJ_TRUE; |
| 1433 | |
| 1434 | pj_gettimeofday(&now); |
| 1435 | PJ_TIME_VAL_SUB(now, tcp->last_activity); |
| 1436 | |
| 1437 | if (now.sec > 0 && now.sec < PJSIP_TCP_KEEP_ALIVE_INTERVAL) { |
| 1438 | /* There has been activity, so don't send keep-alive */ |
| 1439 | delay.sec = PJSIP_TCP_KEEP_ALIVE_INTERVAL - now.sec; |
| 1440 | delay.msec = 0; |
| 1441 | |
| 1442 | pjsip_endpt_schedule_timer(tcp->base.endpt, &tcp->ka_timer, |
| 1443 | &delay); |
| 1444 | tcp->ka_timer.id = PJ_TRUE; |
| 1445 | return; |
| 1446 | } |
| 1447 | |
| 1448 | PJ_LOG(5,(tcp->base.obj_name, "Sending %d byte(s) keep-alive to %.*s:%d", |
| 1449 | (int)tcp->ka_pkt.slen, (int)tcp->base.remote_name.host.slen, |
| 1450 | tcp->base.remote_name.host.ptr, |
| 1451 | tcp->base.remote_name.port)); |
| 1452 | |
| 1453 | /* Send the data */ |
| 1454 | size = tcp->ka_pkt.slen; |
| 1455 | status = pj_activesock_send(tcp->asock, &tcp->ka_op_key.key, |
| 1456 | tcp->ka_pkt.ptr, &size, 0); |
| 1457 | |
| 1458 | if (status != PJ_SUCCESS && status != PJ_EPENDING) { |
| 1459 | tcp_perror(tcp->base.obj_name, |
| 1460 | "Error sending keep-alive packet", status); |
| 1461 | tcp_init_shutdown(tcp, status); |
| 1462 | return; |
| 1463 | } |
| 1464 | |
| 1465 | /* Register next keep-alive */ |
| 1466 | delay.sec = PJSIP_TCP_KEEP_ALIVE_INTERVAL; |
| 1467 | delay.msec = 0; |
| 1468 | |
| 1469 | pjsip_endpt_schedule_timer(tcp->base.endpt, &tcp->ka_timer, |
| 1470 | &delay); |
| 1471 | tcp->ka_timer.id = PJ_TRUE; |
| 1472 | } |
| 1473 | |
| 1474 | |
| 1475 | #endif /* PJ_HAS_TCP */ |
| 1476 | |