Benny Prijono | 268ca61 | 2006-02-07 12:34:11 +0000 | [diff] [blame] | 1 | /* $Id$ */ |
| 2 | /* |
| 3 | * Copyright (C) 2003-2006 Benny Prijono <benny@prijono.org> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 18 | */ |
| 19 | #include <pjsip-ua/sip_inv.h> |
| 20 | #include <pjsip/sip_module.h> |
| 21 | #include <pjsip/sip_endpoint.h> |
| 22 | #include <pjsip/sip_event.h> |
| 23 | #include <pjsip/sip_transaction.h> |
| 24 | #include <pjmedia/sdp.h> |
| 25 | #include <pjmedia/sdp_neg.h> |
| 26 | #include <pj/string.h> |
| 27 | #include <pj/pool.h> |
| 28 | #include <pj/assert.h> |
| 29 | |
| 30 | #define THIS_FILE "sip_invite_session.c" |
| 31 | |
| 32 | /* |
| 33 | * Static prototypes. |
| 34 | */ |
| 35 | static pj_status_t mod_inv_load(pjsip_endpoint *endpt); |
| 36 | static pj_status_t mod_inv_unload(void); |
| 37 | static pj_bool_t mod_inv_on_rx_request(pjsip_rx_data *rdata); |
| 38 | static pj_bool_t mod_inv_on_rx_response(pjsip_rx_data *rdata); |
| 39 | static void mod_inv_on_tsx_state(pjsip_transaction*, pjsip_event*); |
| 40 | |
| 41 | static void inv_on_state_null( pjsip_inv_session *s, pjsip_event *e); |
| 42 | static void inv_on_state_calling( pjsip_inv_session *s, pjsip_event *e); |
| 43 | static void inv_on_state_incoming( pjsip_inv_session *s, pjsip_event *e); |
| 44 | static void inv_on_state_early( pjsip_inv_session *s, pjsip_event *e); |
| 45 | static void inv_on_state_connecting( pjsip_inv_session *s, pjsip_event *e); |
| 46 | static void inv_on_state_confirmed( pjsip_inv_session *s, pjsip_event *e); |
| 47 | static void inv_on_state_disconnected( pjsip_inv_session *s, pjsip_event *e); |
| 48 | static void inv_on_state_terminated( pjsip_inv_session *s, pjsip_event *e); |
| 49 | |
| 50 | static void (*inv_state_handler[])( pjsip_inv_session *s, pjsip_event *e) = |
| 51 | { |
| 52 | &inv_on_state_null, |
| 53 | &inv_on_state_calling, |
| 54 | &inv_on_state_incoming, |
| 55 | &inv_on_state_early, |
| 56 | &inv_on_state_connecting, |
| 57 | &inv_on_state_confirmed, |
| 58 | &inv_on_state_disconnected, |
| 59 | &inv_on_state_terminated, |
| 60 | }; |
| 61 | |
| 62 | static struct mod_inv |
| 63 | { |
| 64 | pjsip_module mod; |
| 65 | pjsip_endpoint *endpt; |
| 66 | pjsip_inv_callback cb; |
| 67 | pjsip_module *app_user; |
| 68 | } mod_inv = |
| 69 | { |
| 70 | { |
| 71 | NULL, NULL, /* prev, next. */ |
| 72 | { "mod-invite", 10 }, /* Name. */ |
| 73 | -1, /* Id */ |
| 74 | PJSIP_MOD_PRIORITY_APPLICATION-1, /* Priority */ |
| 75 | NULL, /* User data. */ |
| 76 | &mod_inv_load, /* load() */ |
| 77 | NULL, /* start() */ |
| 78 | NULL, /* stop() */ |
| 79 | &mod_inv_unload, /* unload() */ |
| 80 | &mod_inv_on_rx_request, /* on_rx_request() */ |
| 81 | &mod_inv_on_rx_response, /* on_rx_response() */ |
| 82 | NULL, /* on_tx_request. */ |
| 83 | NULL, /* on_tx_response() */ |
| 84 | &mod_inv_on_tsx_state, /* on_tsx_state() */ |
| 85 | } |
| 86 | }; |
| 87 | |
| 88 | |
| 89 | |
| 90 | static pj_status_t mod_inv_load(pjsip_endpoint *endpt) |
| 91 | { |
| 92 | pj_str_t allowed[] = {{"INVITE", 6}, {"ACK",3}, {"BYE",3}, {"CANCEL",6}}; |
| 93 | |
| 94 | /* Register supported methods: INVITE, ACK, BYE, CANCEL */ |
| 95 | pjsip_endpt_add_capability(endpt, &mod_inv.mod, PJSIP_H_ALLOW, NULL, |
| 96 | PJ_ARRAY_SIZE(allowed), allowed); |
| 97 | |
| 98 | return PJ_SUCCESS; |
| 99 | } |
| 100 | |
| 101 | static pj_status_t mod_inv_unload(void) |
| 102 | { |
| 103 | /* Should remove capability here */ |
| 104 | return PJ_SUCCESS; |
| 105 | } |
| 106 | |
| 107 | static pj_bool_t mod_inv_on_rx_request(pjsip_rx_data *rdata) |
| 108 | { |
Benny Prijono | ccf9562 | 2006-02-07 18:48:01 +0000 | [diff] [blame^] | 109 | pjsip_dialog *dlg; |
| 110 | |
Benny Prijono | 268ca61 | 2006-02-07 12:34:11 +0000 | [diff] [blame] | 111 | /* Ignore requests outside dialog */ |
Benny Prijono | ccf9562 | 2006-02-07 18:48:01 +0000 | [diff] [blame^] | 112 | dlg = pjsip_rdata_get_dlg(rdata); |
| 113 | if (dlg == NULL) |
Benny Prijono | 268ca61 | 2006-02-07 12:34:11 +0000 | [diff] [blame] | 114 | return PJ_FALSE; |
| 115 | |
Benny Prijono | ccf9562 | 2006-02-07 18:48:01 +0000 | [diff] [blame^] | 116 | /* Answer BYE with 200/OK. */ |
| 117 | if (rdata->msg_info.msg->line.req.method.id == PJSIP_BYE_METHOD) { |
| 118 | pj_status_t status; |
| 119 | pjsip_tx_data *tdata; |
| 120 | |
| 121 | status = pjsip_dlg_create_response(dlg, rdata, 200, NULL, &tdata); |
| 122 | if (status == PJ_SUCCESS) |
| 123 | status = pjsip_dlg_send_response(dlg, pjsip_rdata_get_tsx(rdata), |
| 124 | tdata); |
| 125 | |
| 126 | return status==PJ_SUCCESS ? PJ_TRUE : PJ_FALSE; |
| 127 | } |
| 128 | |
Benny Prijono | 268ca61 | 2006-02-07 12:34:11 +0000 | [diff] [blame] | 129 | return PJ_FALSE; |
| 130 | } |
| 131 | |
| 132 | static pj_status_t send_ack(pjsip_inv_session *inv, pjsip_rx_data *rdata) |
| 133 | { |
| 134 | pjsip_tx_data *tdata; |
| 135 | pj_status_t status; |
| 136 | |
| 137 | status = pjsip_dlg_create_request(inv->dlg, &pjsip_ack_method, |
| 138 | rdata->msg_info.cseq->cseq, &tdata); |
| 139 | if (status != PJ_SUCCESS) { |
| 140 | /* Better luck next time */ |
| 141 | pj_assert(!"Unable to create ACK!"); |
| 142 | return status; |
| 143 | } |
| 144 | |
| 145 | status = pjsip_dlg_send_request(inv->dlg, tdata, NULL); |
| 146 | if (status != PJ_SUCCESS) { |
| 147 | /* Better luck next time */ |
| 148 | pj_assert(!"Unable to send ACK!"); |
| 149 | return status; |
| 150 | } |
| 151 | |
| 152 | return PJ_SUCCESS; |
| 153 | } |
| 154 | |
| 155 | static pj_bool_t mod_inv_on_rx_response(pjsip_rx_data *rdata) |
| 156 | { |
| 157 | pjsip_dialog *dlg; |
| 158 | pjsip_inv_session *inv; |
| 159 | pjsip_msg *msg = rdata->msg_info.msg; |
| 160 | |
| 161 | dlg = pjsip_rdata_get_dlg(rdata); |
| 162 | |
| 163 | /* Ignore responses outside dialog */ |
| 164 | if (dlg == NULL) |
| 165 | return PJ_FALSE; |
| 166 | |
| 167 | /* Ignore responses not belonging to invite session */ |
| 168 | inv = pjsip_dlg_get_inv_session(dlg); |
| 169 | if (inv == NULL) |
| 170 | return PJ_FALSE; |
| 171 | |
| 172 | /* This MAY be retransmission of 2xx response to INVITE. |
| 173 | * If it is, we need to send ACK. |
| 174 | */ |
| 175 | if (msg->type == PJSIP_RESPONSE_MSG && msg->line.status.code/100==2 && |
| 176 | rdata->msg_info.cseq->method.id == PJSIP_INVITE_METHOD) { |
| 177 | |
| 178 | send_ack(inv, rdata); |
| 179 | return PJ_TRUE; |
| 180 | |
| 181 | } |
| 182 | |
| 183 | /* No other processing needs to be done here. */ |
| 184 | return PJ_FALSE; |
| 185 | } |
| 186 | |
| 187 | static void mod_inv_on_tsx_state(pjsip_transaction *tsx, pjsip_event *e) |
| 188 | { |
| 189 | pjsip_dialog *dlg; |
| 190 | pjsip_inv_session *inv; |
| 191 | |
| 192 | dlg = pjsip_tsx_get_dlg(tsx); |
| 193 | if (dlg == NULL) |
| 194 | return; |
| 195 | |
| 196 | inv = pjsip_dlg_get_inv_session(dlg); |
| 197 | if (inv == NULL) |
| 198 | return; |
| 199 | |
| 200 | /* Call state handler for the invite session. */ |
| 201 | (*inv_state_handler[inv->state])(inv, e); |
| 202 | |
| 203 | /* Call on_tsx_state */ |
| 204 | if (mod_inv.cb.on_tsx_state_changed) |
| 205 | (*mod_inv.cb.on_tsx_state_changed)(inv, tsx, e); |
| 206 | |
| 207 | /* Clear invite transaction when tsx is terminated. */ |
| 208 | if (tsx->state==PJSIP_TSX_STATE_TERMINATED && tsx == inv->invite_tsx) |
| 209 | inv->invite_tsx = NULL; |
| 210 | } |
| 211 | |
| 212 | PJ_DEF(pj_status_t) pjsip_inv_usage_init( pjsip_endpoint *endpt, |
| 213 | pjsip_module *app_module, |
| 214 | const pjsip_inv_callback *cb) |
| 215 | { |
| 216 | pj_status_t status; |
| 217 | |
| 218 | /* Check arguments. */ |
| 219 | PJ_ASSERT_RETURN(endpt && app_module && cb, PJ_EINVAL); |
| 220 | |
| 221 | /* Some callbacks are mandatory */ |
| 222 | PJ_ASSERT_RETURN(cb->on_state_changed && cb->on_new_session, PJ_EINVAL); |
| 223 | |
| 224 | /* Check if module already registered. */ |
| 225 | PJ_ASSERT_RETURN(mod_inv.mod.id == -1, PJ_EINVALIDOP); |
| 226 | |
| 227 | /* Copy param. */ |
| 228 | pj_memcpy(&mod_inv.cb, cb, sizeof(pjsip_inv_callback)); |
| 229 | |
| 230 | mod_inv.endpt = endpt; |
| 231 | mod_inv.app_user = app_module; |
| 232 | |
| 233 | /* Register the module. */ |
| 234 | status = pjsip_endpt_register_module(endpt, &mod_inv.mod); |
| 235 | |
| 236 | return status; |
| 237 | } |
| 238 | |
| 239 | PJ_DEF(pjsip_module*) pjsip_inv_usage_instance(void) |
| 240 | { |
| 241 | return &mod_inv.mod; |
| 242 | } |
| 243 | |
| 244 | |
| 245 | PJ_DEF(pjsip_inv_session*) pjsip_dlg_get_inv_session(pjsip_dialog *dlg) |
| 246 | { |
| 247 | return dlg->mod_data[mod_inv.mod.id]; |
| 248 | } |
| 249 | |
| 250 | /* |
| 251 | * Create UAC session. |
| 252 | */ |
| 253 | PJ_DEF(pj_status_t) pjsip_inv_create_uac( pjsip_dialog *dlg, |
| 254 | const pjmedia_sdp_session *local_sdp, |
| 255 | unsigned options, |
| 256 | pjsip_inv_session **p_inv) |
| 257 | { |
| 258 | pjsip_inv_session *inv; |
| 259 | pj_status_t status; |
| 260 | |
| 261 | /* Verify arguments. */ |
| 262 | PJ_ASSERT_RETURN(dlg && p_inv, PJ_EINVAL); |
| 263 | |
| 264 | /* Normalize options */ |
| 265 | if (options & PJSIP_INV_REQUIRE_100REL) |
| 266 | options |= PJSIP_INV_SUPPORT_100REL; |
| 267 | |
| 268 | if (options & PJSIP_INV_REQUIRE_TIMER) |
| 269 | options |= PJSIP_INV_SUPPORT_TIMER; |
| 270 | |
| 271 | /* Create the session */ |
| 272 | inv = pj_pool_zalloc(dlg->pool, sizeof(pjsip_inv_session)); |
| 273 | PJ_ASSERT_RETURN(inv != NULL, PJ_ENOMEM); |
| 274 | |
| 275 | inv->pool = dlg->pool; |
| 276 | inv->role = PJSIP_ROLE_UAC; |
| 277 | inv->state = PJSIP_INV_STATE_NULL; |
| 278 | inv->dlg = dlg; |
| 279 | inv->options = options; |
| 280 | |
| 281 | /* Create negotiator if local_sdp is specified. */ |
| 282 | if (local_sdp) { |
| 283 | status = pjmedia_sdp_neg_create_w_local_offer(dlg->pool, local_sdp, |
| 284 | &inv->neg); |
| 285 | if (status != PJ_SUCCESS) |
| 286 | return status; |
| 287 | } |
| 288 | |
| 289 | /* Register invite as dialog usage. */ |
| 290 | status = pjsip_dlg_add_usage(dlg, &mod_inv.mod, inv); |
| 291 | if (status != PJ_SUCCESS) |
| 292 | return status; |
| 293 | |
| 294 | /* Increment dialog session */ |
| 295 | pjsip_dlg_inc_session(dlg); |
| 296 | |
| 297 | /* Done */ |
| 298 | *p_inv = inv; |
| 299 | return PJ_SUCCESS; |
| 300 | } |
| 301 | |
| 302 | /* |
| 303 | * Verify incoming INVITE request. |
| 304 | */ |
| 305 | PJ_DEF(pj_status_t) pjsip_inv_verify_request(pjsip_rx_data *rdata, |
| 306 | unsigned *options, |
| 307 | const pjmedia_sdp_session *l_sdp, |
| 308 | pjsip_dialog *dlg, |
| 309 | pjsip_endpoint *endpt, |
| 310 | pjsip_tx_data **p_tdata) |
| 311 | { |
| 312 | pjsip_msg *msg; |
| 313 | pjsip_allow_hdr *allow; |
| 314 | pjsip_supported_hdr *sup_hdr; |
| 315 | pjsip_require_hdr *req_hdr; |
| 316 | int code = 200; |
| 317 | unsigned rem_option = 0; |
| 318 | pj_status_t status = PJ_SUCCESS; |
| 319 | pjsip_hdr res_hdr_list; |
| 320 | |
| 321 | /* Init return arguments. */ |
| 322 | if (p_tdata) *p_tdata = NULL; |
| 323 | |
| 324 | /* Verify arguments. */ |
| 325 | PJ_ASSERT_RETURN(rdata != NULL && options != NULL, PJ_EINVAL); |
| 326 | |
| 327 | /* Normalize options */ |
| 328 | if (*options & PJSIP_INV_REQUIRE_100REL) |
| 329 | *options |= PJSIP_INV_SUPPORT_100REL; |
| 330 | |
| 331 | if (*options & PJSIP_INV_REQUIRE_TIMER) |
| 332 | *options |= PJSIP_INV_SUPPORT_TIMER; |
| 333 | |
| 334 | /* Get the message in rdata */ |
| 335 | msg = rdata->msg_info.msg; |
| 336 | |
| 337 | /* Must be INVITE request. */ |
| 338 | PJ_ASSERT_RETURN(msg->type == PJSIP_REQUEST_MSG && |
| 339 | msg->line.req.method.id == PJSIP_INVITE_METHOD, |
| 340 | PJ_EINVAL); |
| 341 | |
| 342 | /* If tdata is specified, then either dlg or endpt must be specified */ |
| 343 | PJ_ASSERT_RETURN((!p_tdata) || (endpt || dlg), PJ_EINVAL); |
| 344 | |
| 345 | /* Get the endpoint */ |
| 346 | endpt = endpt ? endpt : dlg->endpt; |
| 347 | |
| 348 | /* Init response header list */ |
| 349 | pj_list_init(&res_hdr_list); |
| 350 | |
| 351 | /* Check the request body, see if it's something that we support |
| 352 | * (i.e. SDP). |
| 353 | */ |
| 354 | if (msg->body) { |
| 355 | pjsip_msg_body *body = msg->body; |
| 356 | pj_str_t str_application = {"application", 11}; |
| 357 | pj_str_t str_sdp = { "sdp", 3 }; |
| 358 | pjmedia_sdp_session *sdp; |
| 359 | |
| 360 | /* Check content type. */ |
| 361 | if (pj_stricmp(&body->content_type.type, &str_application) != 0 || |
| 362 | pj_stricmp(&body->content_type.subtype, &str_sdp) != 0) |
| 363 | { |
| 364 | /* Not "application/sdp" */ |
| 365 | code = PJSIP_SC_UNSUPPORTED_MEDIA_TYPE; |
| 366 | status = PJSIP_ERRNO_FROM_SIP_STATUS(code); |
| 367 | |
| 368 | if (p_tdata) { |
| 369 | /* Add Accept header to response */ |
| 370 | pjsip_accept_hdr *acc; |
| 371 | |
| 372 | acc = pjsip_accept_hdr_create(rdata->tp_info.pool); |
| 373 | PJ_ASSERT_RETURN(acc, PJ_ENOMEM); |
| 374 | acc->values[acc->count++] = pj_str("application/sdp"); |
| 375 | pj_list_push_back(&res_hdr_list, acc); |
| 376 | } |
| 377 | |
| 378 | goto on_return; |
| 379 | } |
| 380 | |
| 381 | /* Parse and validate SDP */ |
| 382 | status = pjmedia_sdp_parse(rdata->tp_info.pool, body->data, body->len, |
| 383 | &sdp); |
| 384 | if (status == PJ_SUCCESS) |
| 385 | status = pjmedia_sdp_validate(sdp); |
| 386 | |
| 387 | if (status != PJ_SUCCESS) { |
| 388 | /* Unparseable or invalid SDP */ |
| 389 | code = PJSIP_SC_BAD_REQUEST; |
| 390 | |
| 391 | if (p_tdata) { |
| 392 | /* Add Warning header. */ |
| 393 | pjsip_warning_hdr *w; |
| 394 | |
| 395 | w = pjsip_warning_hdr_create_from_status(rdata->tp_info.pool, |
| 396 | pjsip_endpt_name(endpt), |
| 397 | status); |
| 398 | PJ_ASSERT_RETURN(w, PJ_ENOMEM); |
| 399 | |
| 400 | pj_list_push_back(&res_hdr_list, w); |
| 401 | } |
| 402 | |
| 403 | goto on_return; |
| 404 | } |
| 405 | |
| 406 | /* Negotiate with local SDP */ |
| 407 | if (l_sdp) { |
| 408 | pjmedia_sdp_neg *neg; |
| 409 | |
| 410 | /* Local SDP must be valid! */ |
| 411 | PJ_ASSERT_RETURN((status=pjmedia_sdp_validate(l_sdp))==PJ_SUCCESS, |
| 412 | status); |
| 413 | |
| 414 | /* Create SDP negotiator */ |
| 415 | status = pjmedia_sdp_neg_create_w_remote_offer( |
| 416 | rdata->tp_info.pool, l_sdp, sdp, &neg); |
| 417 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 418 | |
| 419 | /* Negotiate SDP */ |
| 420 | status = pjmedia_sdp_neg_negotiate(rdata->tp_info.pool, neg, 0); |
| 421 | if (status != PJ_SUCCESS) { |
| 422 | |
| 423 | /* Incompatible media */ |
| 424 | code = PJSIP_SC_NOT_ACCEPTABLE_HERE; |
| 425 | status = PJSIP_ERRNO_FROM_SIP_STATUS(code); |
| 426 | |
| 427 | if (p_tdata) { |
| 428 | pjsip_accept_hdr *acc; |
| 429 | pjsip_warning_hdr *w; |
| 430 | |
| 431 | /* Add Warning header. */ |
| 432 | w = pjsip_warning_hdr_create_from_status( |
| 433 | rdata->tp_info.pool, |
| 434 | pjsip_endpt_name(endpt), status); |
| 435 | PJ_ASSERT_RETURN(w, PJ_ENOMEM); |
| 436 | |
| 437 | pj_list_push_back(&res_hdr_list, w); |
| 438 | |
| 439 | /* Add Accept header to response */ |
| 440 | acc = pjsip_accept_hdr_create(rdata->tp_info.pool); |
| 441 | PJ_ASSERT_RETURN(acc, PJ_ENOMEM); |
| 442 | acc->values[acc->count++] = pj_str("application/sdp"); |
| 443 | pj_list_push_back(&res_hdr_list, acc); |
| 444 | |
| 445 | } |
| 446 | |
| 447 | goto on_return; |
| 448 | } |
| 449 | } |
| 450 | } |
| 451 | |
| 452 | /* Check supported methods, see if peer supports UPDATE. |
| 453 | * We just assume that peer supports standard INVITE, ACK, CANCEL, and BYE |
| 454 | * implicitly by sending this INVITE. |
| 455 | */ |
| 456 | allow = pjsip_msg_find_hdr(msg, PJSIP_H_ALLOW, NULL); |
| 457 | if (allow) { |
| 458 | unsigned i; |
| 459 | const pj_str_t STR_UPDATE = { "UPDATE", 6 }; |
| 460 | |
| 461 | for (i=0; i<allow->count; ++i) { |
| 462 | if (pj_stricmp(&allow->values[i], &STR_UPDATE)==0) |
| 463 | break; |
| 464 | } |
| 465 | |
| 466 | if (i != allow->count) { |
| 467 | /* UPDATE is present in Allow */ |
| 468 | rem_option |= PJSIP_INV_SUPPORT_UPDATE; |
| 469 | } |
| 470 | |
| 471 | } |
| 472 | |
| 473 | /* Check Supported header */ |
| 474 | sup_hdr = pjsip_msg_find_hdr(msg, PJSIP_H_SUPPORTED, NULL); |
| 475 | if (sup_hdr) { |
| 476 | unsigned i; |
| 477 | pj_str_t STR_100REL = { "100rel", 6}; |
| 478 | pj_str_t STR_TIMER = { "timer", 5 }; |
| 479 | |
| 480 | for (i=0; i<sup_hdr->count; ++i) { |
| 481 | if (pj_stricmp(&sup_hdr->values[i], &STR_100REL)==0) |
| 482 | rem_option |= PJSIP_INV_SUPPORT_100REL; |
| 483 | else if (pj_stricmp(&sup_hdr->values[i], &STR_TIMER)==0) |
| 484 | rem_option |= PJSIP_INV_SUPPORT_TIMER; |
| 485 | } |
| 486 | } |
| 487 | |
| 488 | /* Check Require header */ |
| 489 | req_hdr = pjsip_msg_find_hdr(msg, PJSIP_H_REQUIRE, NULL); |
| 490 | if (req_hdr) { |
| 491 | unsigned i; |
| 492 | pj_str_t STR_100REL = { "100rel", 6}; |
| 493 | pj_str_t STR_TIMER = { "timer", 5 }; |
| 494 | unsigned unsupp_cnt = 0; |
| 495 | pj_str_t unsupp_tags[PJSIP_GENERIC_ARRAY_MAX_COUNT]; |
| 496 | |
| 497 | for (i=0; i<req_hdr->count; ++i) { |
| 498 | if ((*options & PJSIP_INV_SUPPORT_100REL) && |
| 499 | pj_stricmp(&req_hdr->values[i], &STR_100REL)==0) |
| 500 | { |
| 501 | rem_option |= PJSIP_INV_REQUIRE_100REL; |
| 502 | |
| 503 | } else if ((*options && PJSIP_INV_SUPPORT_TIMER) && |
| 504 | pj_stricmp(&req_hdr->values[i], &STR_TIMER)==0) |
| 505 | { |
| 506 | rem_option |= PJSIP_INV_REQUIRE_TIMER; |
| 507 | |
| 508 | } else { |
| 509 | /* Unknown/unsupported extension tag! */ |
| 510 | unsupp_tags[unsupp_cnt++] = req_hdr->values[i]; |
| 511 | } |
| 512 | } |
| 513 | |
| 514 | /* Check if there are required tags that we don't support */ |
| 515 | if (unsupp_cnt) { |
| 516 | |
| 517 | code = PJSIP_SC_BAD_EXTENSION; |
| 518 | status = PJSIP_ERRNO_FROM_SIP_STATUS(code); |
| 519 | |
| 520 | if (p_tdata) { |
| 521 | pjsip_unsupported_hdr *unsupp_hdr; |
| 522 | const pjsip_hdr *h; |
| 523 | |
| 524 | /* Add Unsupported header. */ |
| 525 | unsupp_hdr = pjsip_unsupported_hdr_create(rdata->tp_info.pool); |
| 526 | PJ_ASSERT_RETURN(unsupp_hdr != NULL, PJ_ENOMEM); |
| 527 | |
| 528 | unsupp_hdr->count = unsupp_cnt; |
| 529 | for (i=0; i<unsupp_cnt; ++i) |
| 530 | unsupp_hdr->values[i] = unsupp_tags[i]; |
| 531 | |
| 532 | pj_list_push_back(&res_hdr_list, unsupp_hdr); |
| 533 | |
| 534 | /* Add Supported header. */ |
| 535 | h = pjsip_endpt_get_capability(endpt, PJSIP_H_SUPPORTED, |
| 536 | NULL); |
| 537 | pj_assert(h); |
| 538 | if (h) { |
| 539 | sup_hdr = pjsip_hdr_clone(rdata->tp_info.pool, h); |
| 540 | pj_list_push_back(&res_hdr_list, sup_hdr); |
| 541 | } |
| 542 | } |
| 543 | |
| 544 | goto on_return; |
| 545 | } |
| 546 | } |
| 547 | |
| 548 | /* Check if there are local requirements that are not supported |
| 549 | * by peer. |
| 550 | */ |
| 551 | if ( ((*options & PJSIP_INV_REQUIRE_100REL)!=0 && |
| 552 | (rem_option & PJSIP_INV_SUPPORT_100REL)==0) || |
| 553 | ((*options & PJSIP_INV_REQUIRE_TIMER)!=0 && |
| 554 | (rem_option & PJSIP_INV_SUPPORT_TIMER)==0)) |
| 555 | { |
| 556 | code = PJSIP_SC_EXTENSION_REQUIRED; |
| 557 | status = PJSIP_ERRNO_FROM_SIP_STATUS(code); |
| 558 | |
| 559 | if (p_tdata) { |
| 560 | const pjsip_hdr *h; |
| 561 | |
| 562 | /* Add Require header. */ |
| 563 | req_hdr = pjsip_require_hdr_create(rdata->tp_info.pool); |
| 564 | PJ_ASSERT_RETURN(req_hdr != NULL, PJ_ENOMEM); |
| 565 | |
| 566 | if (*options & PJSIP_INV_REQUIRE_100REL) |
| 567 | req_hdr->values[req_hdr->count++] = pj_str("100rel"); |
| 568 | |
| 569 | if (*options & PJSIP_INV_REQUIRE_TIMER) |
| 570 | req_hdr->values[req_hdr->count++] = pj_str("timer"); |
| 571 | |
| 572 | pj_list_push_back(&res_hdr_list, req_hdr); |
| 573 | |
| 574 | /* Add Supported header. */ |
| 575 | h = pjsip_endpt_get_capability(endpt, PJSIP_H_SUPPORTED, |
| 576 | NULL); |
| 577 | pj_assert(h); |
| 578 | if (h) { |
| 579 | sup_hdr = pjsip_hdr_clone(rdata->tp_info.pool, h); |
| 580 | pj_list_push_back(&res_hdr_list, sup_hdr); |
| 581 | } |
| 582 | |
| 583 | } |
| 584 | |
| 585 | goto on_return; |
| 586 | } |
| 587 | |
| 588 | on_return: |
| 589 | |
| 590 | /* Create response if necessary */ |
| 591 | if (code != 200 && p_tdata) { |
| 592 | pjsip_tx_data *tdata; |
| 593 | const pjsip_hdr *h; |
| 594 | |
| 595 | if (dlg) { |
| 596 | status = pjsip_dlg_create_response(dlg, rdata, code, NULL, |
| 597 | &tdata); |
| 598 | } else { |
| 599 | status = pjsip_endpt_create_response(endpt, rdata, code, NULL, |
| 600 | &tdata); |
| 601 | } |
| 602 | |
| 603 | if (status != PJ_SUCCESS) |
| 604 | return status; |
| 605 | |
| 606 | /* Add response headers. */ |
| 607 | h = res_hdr_list.next; |
| 608 | while (h != &res_hdr_list) { |
| 609 | pjsip_hdr *cloned; |
| 610 | |
| 611 | cloned = pjsip_hdr_clone(tdata->pool, h); |
| 612 | PJ_ASSERT_RETURN(cloned, PJ_ENOMEM); |
| 613 | |
| 614 | pjsip_msg_add_hdr(tdata->msg, cloned); |
| 615 | |
| 616 | h = h->next; |
| 617 | } |
| 618 | |
| 619 | *p_tdata = tdata; |
| 620 | } |
| 621 | |
| 622 | return status; |
| 623 | } |
| 624 | |
| 625 | /* |
| 626 | * Create UAS session. |
| 627 | */ |
| 628 | PJ_DEF(pj_status_t) pjsip_inv_create_uas( pjsip_dialog *dlg, |
| 629 | pjsip_rx_data *rdata, |
| 630 | const pjmedia_sdp_session *local_sdp, |
| 631 | unsigned options, |
| 632 | pjsip_inv_session **p_inv) |
| 633 | { |
| 634 | pjsip_inv_session *inv; |
| 635 | pjsip_msg *msg; |
| 636 | pjmedia_sdp_session *rem_sdp = NULL; |
| 637 | pj_status_t status; |
| 638 | |
| 639 | /* Verify arguments. */ |
| 640 | PJ_ASSERT_RETURN(dlg && rdata && p_inv, PJ_EINVAL); |
| 641 | |
| 642 | /* Dialog MUST have been initialised. */ |
| 643 | PJ_ASSERT_RETURN(pjsip_rdata_get_tsx(rdata) != NULL, PJ_EINVALIDOP); |
| 644 | |
| 645 | msg = rdata->msg_info.msg; |
| 646 | |
| 647 | /* rdata MUST contain INVITE request */ |
| 648 | PJ_ASSERT_RETURN(msg->type == PJSIP_REQUEST_MSG && |
| 649 | msg->line.req.method.id == PJSIP_INVITE_METHOD, |
| 650 | PJ_EINVALIDOP); |
| 651 | |
| 652 | /* Normalize options */ |
| 653 | if (options & PJSIP_INV_REQUIRE_100REL) |
| 654 | options |= PJSIP_INV_SUPPORT_100REL; |
| 655 | |
| 656 | if (options & PJSIP_INV_REQUIRE_TIMER) |
| 657 | options |= PJSIP_INV_SUPPORT_TIMER; |
| 658 | |
| 659 | /* Create the session */ |
| 660 | inv = pj_pool_zalloc(dlg->pool, sizeof(pjsip_inv_session)); |
| 661 | PJ_ASSERT_RETURN(inv != NULL, PJ_ENOMEM); |
| 662 | |
| 663 | inv->pool = dlg->pool; |
| 664 | inv->role = PJSIP_ROLE_UAS; |
| 665 | inv->state = PJSIP_INV_STATE_NULL; |
| 666 | inv->dlg = dlg; |
| 667 | inv->options = options; |
| 668 | |
| 669 | /* Parse SDP in message body, if present. */ |
| 670 | if (msg->body) { |
| 671 | pjsip_msg_body *body = msg->body; |
| 672 | |
| 673 | /* Parse and validate SDP */ |
| 674 | status = pjmedia_sdp_parse(inv->pool, body->data, body->len, |
| 675 | &rem_sdp); |
| 676 | if (status == PJ_SUCCESS) |
| 677 | status = pjmedia_sdp_validate(rem_sdp); |
| 678 | |
| 679 | if (status != PJ_SUCCESS) |
| 680 | return status; |
| 681 | } |
| 682 | |
| 683 | /* Create negotiator. */ |
| 684 | if (rem_sdp) { |
| 685 | status = pjmedia_sdp_neg_create_w_remote_offer(inv->pool, local_sdp, |
| 686 | rem_sdp, &inv->neg); |
| 687 | |
| 688 | } else if (local_sdp) { |
| 689 | status = pjmedia_sdp_neg_create_w_local_offer(inv->pool, local_sdp, |
| 690 | &inv->neg); |
| 691 | } else { |
| 692 | pj_assert(!"UAS dialog without remote and local offer is not supported!"); |
| 693 | PJ_TODO(IMPLEMENT_DELAYED_UAS_OFFER); |
| 694 | status = PJ_ENOTSUP; |
| 695 | } |
| 696 | |
| 697 | if (status != PJ_SUCCESS) |
| 698 | return status; |
| 699 | |
| 700 | /* Register invite as dialog usage. */ |
| 701 | status = pjsip_dlg_add_usage(dlg, &mod_inv.mod, inv); |
| 702 | if (status != PJ_SUCCESS) |
| 703 | return status; |
| 704 | |
| 705 | /* Increment session in the dialog. */ |
| 706 | pjsip_dlg_inc_session(dlg); |
| 707 | |
| 708 | /* Save the invite transaction. */ |
| 709 | inv->invite_tsx = pjsip_rdata_get_tsx(rdata); |
| 710 | inv->invite_tsx->mod_data[mod_inv.mod.id] = inv; |
| 711 | |
| 712 | /* Done */ |
| 713 | *p_inv = inv; |
| 714 | return PJ_SUCCESS; |
| 715 | } |
| 716 | |
| 717 | static void *clone_sdp(pj_pool_t *pool, const void *data, unsigned len) |
| 718 | { |
| 719 | PJ_UNUSED_ARG(len); |
| 720 | return pjmedia_sdp_session_clone(pool, data); |
| 721 | } |
| 722 | |
| 723 | static int print_sdp(pjsip_msg_body *body, char *buf, pj_size_t len) |
| 724 | { |
| 725 | return pjmedia_sdp_print(body->data, buf, len); |
| 726 | } |
| 727 | |
| 728 | static pjsip_msg_body *create_sdp_body(pj_pool_t *pool, |
| 729 | const pjmedia_sdp_session *c_sdp) |
| 730 | { |
| 731 | pjsip_msg_body *body; |
| 732 | |
| 733 | |
| 734 | body = pj_pool_zalloc(pool, sizeof(pjsip_msg_body)); |
| 735 | PJ_ASSERT_RETURN(body != NULL, NULL); |
| 736 | |
| 737 | body->content_type.type = pj_str("application"); |
| 738 | body->content_type.subtype = pj_str("sdp"); |
| 739 | body->data = pjmedia_sdp_session_clone(pool, c_sdp); |
| 740 | body->len = 0; |
| 741 | body->clone_data = &clone_sdp; |
| 742 | body->print_body = &print_sdp; |
| 743 | |
| 744 | return body; |
| 745 | } |
| 746 | |
| 747 | /* |
| 748 | * Create initial INVITE request. |
| 749 | */ |
| 750 | PJ_DEF(pj_status_t) pjsip_inv_invite( pjsip_inv_session *inv, |
| 751 | pjsip_tx_data **p_tdata ) |
| 752 | { |
| 753 | pjsip_tx_data *tdata; |
| 754 | const pjsip_hdr *hdr; |
| 755 | pj_status_t status; |
| 756 | |
| 757 | /* Verify arguments. */ |
| 758 | PJ_ASSERT_RETURN(inv && p_tdata, PJ_EINVAL); |
| 759 | |
| 760 | /* State MUST be NULL. */ |
| 761 | PJ_ASSERT_RETURN(inv->state == PJSIP_INV_STATE_NULL, PJ_EINVAL); |
| 762 | |
| 763 | /* Create the INVITE request. */ |
| 764 | status = pjsip_dlg_create_request(inv->dlg, &pjsip_invite_method, -1, |
| 765 | &tdata); |
| 766 | if (status != PJ_SUCCESS) |
| 767 | return status; |
| 768 | |
| 769 | /* Add SDP, if any. */ |
| 770 | if (inv->neg && |
| 771 | pjmedia_sdp_neg_get_state(inv->neg)==PJMEDIA_SDP_NEG_STATE_LOCAL_OFFER) |
| 772 | { |
| 773 | const pjmedia_sdp_session *offer; |
| 774 | |
| 775 | status = pjmedia_sdp_neg_get_neg_local(inv->neg, &offer); |
| 776 | if (status != PJ_SUCCESS) |
| 777 | return status; |
| 778 | |
| 779 | tdata->msg->body = create_sdp_body(tdata->pool, offer); |
| 780 | } |
| 781 | |
| 782 | /* Add Allow header. */ |
| 783 | hdr = pjsip_endpt_get_capability(inv->dlg->endpt, PJSIP_H_ALLOW, NULL); |
| 784 | if (hdr) { |
| 785 | pjsip_msg_add_hdr(tdata->msg, |
| 786 | pjsip_hdr_shallow_clone(tdata->pool, hdr)); |
| 787 | } |
| 788 | |
| 789 | /* Add Supported header */ |
| 790 | hdr = pjsip_endpt_get_capability(inv->dlg->endpt, PJSIP_H_SUPPORTED, NULL); |
| 791 | if (hdr) { |
| 792 | pjsip_msg_add_hdr(tdata->msg, |
| 793 | pjsip_hdr_shallow_clone(tdata->pool, hdr)); |
| 794 | } |
| 795 | |
| 796 | /* Add Require header. */ |
| 797 | PJ_TODO(INVITE_ADD_REQUIRE_HEADER); |
| 798 | |
| 799 | /* Done. */ |
| 800 | *p_tdata = tdata; |
| 801 | |
| 802 | return PJ_SUCCESS; |
| 803 | } |
| 804 | |
| 805 | |
| 806 | /* |
| 807 | * Answer initial INVITE. |
| 808 | */ |
| 809 | PJ_DEF(pj_status_t) pjsip_inv_answer( pjsip_inv_session *inv, |
| 810 | int st_code, |
| 811 | const pj_str_t *st_text, |
| 812 | const pjmedia_sdp_session *local_sdp, |
| 813 | pjsip_tx_data **p_tdata ) |
| 814 | { |
| 815 | pjsip_tx_data *last_res; |
| 816 | pj_status_t status; |
| 817 | |
| 818 | /* Verify arguments. */ |
| 819 | PJ_ASSERT_RETURN(inv && p_tdata, PJ_EINVAL); |
| 820 | |
| 821 | /* Must have INVITE transaction. */ |
| 822 | PJ_ASSERT_RETURN(inv->invite_tsx, PJ_EBUG); |
| 823 | |
| 824 | /* INVITE transaction MUST have transmitted a response (e.g. 100) */ |
| 825 | PJ_ASSERT_RETURN(inv->invite_tsx->last_tx, PJ_EINVALIDOP); |
| 826 | |
| 827 | /* If local_sdp is specified, then we MUST NOT have answered the |
| 828 | * offer before. |
| 829 | */ |
| 830 | PJ_ASSERT_RETURN(!local_sdp || |
| 831 | (pjmedia_sdp_neg_get_state(inv->neg)==PJMEDIA_SDP_NEG_STATE_REMOTE_OFFER), |
| 832 | PJ_EINVALIDOP); |
| 833 | if (local_sdp) { |
| 834 | status = pjmedia_sdp_neg_set_local_answer(inv->pool, inv->neg, |
| 835 | local_sdp); |
| 836 | if (status != PJ_SUCCESS) |
| 837 | return status; |
| 838 | } |
| 839 | |
| 840 | last_res = inv->invite_tsx->last_tx; |
| 841 | |
| 842 | /* Modify last response. */ |
| 843 | status = pjsip_dlg_modify_response(inv->dlg, last_res, st_code, st_text); |
| 844 | if (status != PJ_SUCCESS) |
| 845 | return status; |
| 846 | |
| 847 | /* Include SDP for 18x and 2xx response. */ |
| 848 | if (st_code/10 == 18 || st_code/10 == 20) { |
| 849 | pjmedia_sdp_session *local; |
| 850 | |
| 851 | status = pjmedia_sdp_neg_get_neg_local(inv->neg, &local); |
| 852 | if (status == PJ_SUCCESS) |
| 853 | last_res->msg->body = create_sdp_body(last_res->pool, local); |
| 854 | ; |
| 855 | } |
| 856 | |
| 857 | /* Do we need to increment tdata's reference counter? */ |
| 858 | PJ_TODO(INV_ANSWER_MAY_HAVE_TO_INCREMENT_REF_COUNTER); |
| 859 | |
| 860 | *p_tdata = last_res; |
| 861 | |
| 862 | return PJ_SUCCESS; |
| 863 | } |
| 864 | |
| 865 | |
| 866 | /* |
| 867 | * End session. |
| 868 | */ |
| 869 | PJ_DEF(pj_status_t) pjsip_inv_end_session( pjsip_inv_session *inv, |
| 870 | int st_code, |
| 871 | const pj_str_t *st_text, |
| 872 | pjsip_tx_data **p_tdata ) |
| 873 | { |
| 874 | pjsip_tx_data *tdata; |
| 875 | pj_status_t status; |
| 876 | |
| 877 | /* Verify arguments. */ |
| 878 | PJ_ASSERT_RETURN(inv && p_tdata, PJ_EINVAL); |
| 879 | |
| 880 | /* Create appropriate message. */ |
| 881 | switch (inv->state) { |
| 882 | case PJSIP_INV_STATE_CALLING: |
| 883 | case PJSIP_INV_STATE_EARLY: |
| 884 | case PJSIP_INV_STATE_INCOMING: |
| 885 | |
| 886 | if (inv->role == PJSIP_ROLE_UAC) { |
| 887 | |
| 888 | /* For UAC when session has not been confirmed, create CANCEL. */ |
| 889 | |
| 890 | /* MUST have the original UAC INVITE transaction. */ |
| 891 | PJ_ASSERT_RETURN(inv->invite_tsx != NULL, PJ_EBUG); |
| 892 | |
| 893 | /* But CANCEL should only be called when we have received a |
| 894 | * provisional response. If we haven't received any responses, |
| 895 | * just destroy the transaction. |
| 896 | */ |
| 897 | if (inv->invite_tsx->status_code < 100) { |
| 898 | |
| 899 | pjsip_tsx_terminate(inv->invite_tsx, 487); |
| 900 | |
| 901 | return PJSIP_ETSXDESTROYED; |
| 902 | } |
| 903 | |
| 904 | /* The CSeq here assumes that the dialog is started with an |
| 905 | * INVITE session. This may not be correct; dialog can be |
| 906 | * started as SUBSCRIBE session. |
| 907 | * So fix this! |
| 908 | */ |
| 909 | status = pjsip_endpt_create_cancel(inv->dlg->endpt, |
| 910 | inv->invite_tsx->last_tx, |
| 911 | &tdata); |
| 912 | |
| 913 | } else { |
| 914 | |
| 915 | /* For UAS, send a final response. */ |
| 916 | tdata = inv->invite_tsx->last_tx; |
| 917 | PJ_ASSERT_RETURN(tdata != NULL, PJ_EINVALIDOP); |
| 918 | |
| 919 | status = pjsip_dlg_modify_response(inv->dlg, tdata, st_code, |
| 920 | st_text); |
| 921 | } |
| 922 | break; |
| 923 | |
| 924 | case PJSIP_INV_STATE_CONNECTING: |
| 925 | case PJSIP_INV_STATE_CONFIRMED: |
| 926 | /* For established dialog, send BYE */ |
| 927 | status = pjsip_dlg_create_request(inv->dlg, &pjsip_bye_method, -1, |
| 928 | &tdata); |
| 929 | break; |
| 930 | |
| 931 | case PJSIP_INV_STATE_DISCONNECTED: |
Benny Prijono | 268ca61 | 2006-02-07 12:34:11 +0000 | [diff] [blame] | 932 | /* No need to do anything. */ |
| 933 | PJ_TODO(RETURN_A_PROPER_STATUS_CODE_HERE); |
| 934 | return PJ_EINVALIDOP; |
| 935 | |
| 936 | default: |
| 937 | pj_assert("!Invalid operation!"); |
| 938 | return PJ_EINVALIDOP; |
| 939 | } |
| 940 | |
| 941 | if (status != PJ_SUCCESS) |
| 942 | return status; |
| 943 | |
| 944 | |
| 945 | /* Done */ |
| 946 | |
| 947 | *p_tdata = tdata; |
| 948 | |
| 949 | return PJ_SUCCESS; |
| 950 | } |
| 951 | |
| 952 | |
| 953 | /* |
| 954 | * Create re-INVITE. |
| 955 | */ |
| 956 | PJ_DEF(pj_status_t) pjsip_inv_reinvite( pjsip_inv_session *inv, |
| 957 | const pj_str_t *new_contact, |
| 958 | const pjmedia_sdp_session *new_offer, |
| 959 | pjsip_tx_data **p_tdata ) |
| 960 | { |
| 961 | PJ_UNUSED_ARG(inv); |
| 962 | PJ_UNUSED_ARG(new_contact); |
| 963 | PJ_UNUSED_ARG(new_offer); |
| 964 | PJ_UNUSED_ARG(p_tdata); |
| 965 | |
| 966 | PJ_TODO(CREATE_REINVITE_REQUEST); |
| 967 | return PJ_ENOTSUP; |
| 968 | } |
| 969 | |
| 970 | /* |
| 971 | * Create UPDATE. |
| 972 | */ |
| 973 | PJ_DEF(pj_status_t) pjsip_inv_update ( pjsip_inv_session *inv, |
| 974 | const pj_str_t *new_contact, |
| 975 | const pjmedia_sdp_session *new_offer, |
| 976 | pjsip_tx_data **p_tdata ) |
| 977 | { |
| 978 | PJ_UNUSED_ARG(inv); |
| 979 | PJ_UNUSED_ARG(new_contact); |
| 980 | PJ_UNUSED_ARG(new_offer); |
| 981 | PJ_UNUSED_ARG(p_tdata); |
| 982 | |
| 983 | PJ_TODO(CREATE_UPDATE_REQUEST); |
| 984 | return PJ_ENOTSUP; |
| 985 | } |
| 986 | |
| 987 | /* |
| 988 | * Send a request or response message. |
| 989 | */ |
| 990 | PJ_DEF(pj_status_t) pjsip_inv_send_msg( pjsip_inv_session *inv, |
| 991 | pjsip_tx_data *tdata, |
| 992 | void *token ) |
| 993 | { |
| 994 | pj_status_t status; |
| 995 | |
| 996 | /* Verify arguments. */ |
| 997 | PJ_ASSERT_RETURN(inv && tdata, PJ_EINVAL); |
| 998 | |
| 999 | if (tdata->msg->type == PJSIP_REQUEST_MSG) { |
| 1000 | pjsip_transaction *tsx; |
| 1001 | |
| 1002 | status = pjsip_dlg_send_request(inv->dlg, tdata, &tsx); |
| 1003 | if (status != PJ_SUCCESS) |
| 1004 | return status; |
| 1005 | |
| 1006 | tsx->mod_data[mod_inv.mod.id] = inv; |
| 1007 | tsx->mod_data[mod_inv.app_user->id] = token; |
| 1008 | |
| 1009 | } else { |
| 1010 | pjsip_cseq_hdr *cseq; |
| 1011 | |
| 1012 | /* Can only do this to send response to original INVITE |
| 1013 | * request. |
| 1014 | */ |
| 1015 | PJ_ASSERT_RETURN((cseq=pjsip_msg_find_hdr(tdata->msg, PJSIP_H_CSEQ, NULL)) != NULL && |
| 1016 | (cseq->cseq == inv->invite_tsx->cseq), |
| 1017 | PJ_EINVALIDOP); |
| 1018 | |
| 1019 | status = pjsip_dlg_send_response(inv->dlg, inv->invite_tsx, tdata); |
| 1020 | if (status != PJ_SUCCESS) |
| 1021 | return status; |
| 1022 | } |
| 1023 | |
| 1024 | /* Done (?) */ |
| 1025 | return PJ_SUCCESS; |
| 1026 | } |
| 1027 | |
| 1028 | |
| 1029 | void inv_set_state(pjsip_inv_session *inv, pjsip_inv_state state, |
| 1030 | pjsip_event *e) |
| 1031 | { |
| 1032 | inv->state = state; |
| 1033 | if (mod_inv.cb.on_state_changed) |
| 1034 | (*mod_inv.cb.on_state_changed)(inv, e); |
| 1035 | |
| 1036 | if (inv->state == PJSIP_INV_STATE_DISCONNECTED) |
| 1037 | pjsip_dlg_dec_session(inv->dlg); |
| 1038 | } |
| 1039 | |
| 1040 | static void inv_on_state_null( pjsip_inv_session *s, pjsip_event *e) |
| 1041 | { |
| 1042 | pjsip_transaction *tsx = e->body.tsx_state.tsx; |
| 1043 | pjsip_dialog *dlg = pjsip_tsx_get_dlg(tsx); |
| 1044 | |
| 1045 | PJ_ASSERT_ON_FAIL(tsx && dlg, return); |
| 1046 | |
| 1047 | if (tsx->method.id == PJSIP_INVITE_METHOD) { |
| 1048 | |
| 1049 | if (dlg->role == PJSIP_ROLE_UAC) { |
| 1050 | |
| 1051 | /* Keep the initial INVITE transaction. */ |
| 1052 | if (s->invite_tsx == NULL) |
| 1053 | s->invite_tsx = tsx; |
| 1054 | |
| 1055 | switch (tsx->state) { |
| 1056 | case PJSIP_TSX_STATE_CALLING: |
| 1057 | inv_set_state(s, PJSIP_INV_STATE_CALLING, e); |
| 1058 | break; |
| 1059 | default: |
| 1060 | pj_assert(!"Unexpected state"); |
| 1061 | break; |
| 1062 | } |
| 1063 | |
| 1064 | } else { |
| 1065 | switch (tsx->state) { |
| 1066 | case PJSIP_TSX_STATE_TRYING: |
| 1067 | inv_set_state(s, PJSIP_INV_STATE_INCOMING, e); |
| 1068 | break; |
| 1069 | default: |
| 1070 | pj_assert(!"Unexpected state"); |
| 1071 | } |
| 1072 | } |
| 1073 | |
| 1074 | } else { |
| 1075 | pj_assert(!"Unexpected transaction type"); |
| 1076 | } |
| 1077 | } |
| 1078 | |
| 1079 | static void inv_on_state_calling( pjsip_inv_session *s, pjsip_event *e) |
| 1080 | { |
| 1081 | pjsip_transaction *tsx = e->body.tsx_state.tsx; |
| 1082 | pjsip_dialog *dlg = pjsip_tsx_get_dlg(tsx); |
Benny Prijono | ccf9562 | 2006-02-07 18:48:01 +0000 | [diff] [blame^] | 1083 | pj_status_t status; |
Benny Prijono | 268ca61 | 2006-02-07 12:34:11 +0000 | [diff] [blame] | 1084 | |
| 1085 | PJ_ASSERT_ON_FAIL(tsx && dlg, return); |
| 1086 | |
Benny Prijono | ccf9562 | 2006-02-07 18:48:01 +0000 | [diff] [blame^] | 1087 | if (tsx == s->invite_tsx) { |
Benny Prijono | 268ca61 | 2006-02-07 12:34:11 +0000 | [diff] [blame] | 1088 | |
| 1089 | switch (tsx->state) { |
| 1090 | |
| 1091 | case PJSIP_TSX_STATE_PROCEEDING: |
| 1092 | if (dlg->remote.info->tag.slen) { |
| 1093 | inv_set_state(s, PJSIP_INV_STATE_EARLY, e); |
| 1094 | } else { |
| 1095 | /* Ignore 100 (Trying) response, as it doesn't change |
| 1096 | * session state. It only ceases retransmissions. |
| 1097 | */ |
| 1098 | } |
| 1099 | break; |
| 1100 | |
| 1101 | case PJSIP_TSX_STATE_COMPLETED: |
| 1102 | if (tsx->status_code/100 == 2) { |
| 1103 | |
| 1104 | /* This should not happen. |
| 1105 | * When transaction receives 2xx, it should be terminated |
| 1106 | */ |
| 1107 | pj_assert(0); |
| 1108 | inv_set_state(s, PJSIP_INV_STATE_CONNECTING, e); |
| 1109 | |
Benny Prijono | ccf9562 | 2006-02-07 18:48:01 +0000 | [diff] [blame^] | 1110 | } else if (tsx->status_code==401 || tsx->status_code==407) { |
| 1111 | |
| 1112 | /* Handle authentication failure: |
| 1113 | * Resend the request with Authorization header. |
| 1114 | */ |
| 1115 | pjsip_tx_data *tdata; |
| 1116 | |
| 1117 | status = pjsip_auth_clt_reinit_req(&s->dlg->auth_sess, |
| 1118 | e->body.tsx_state.src.rdata, |
| 1119 | tsx->last_tx, |
| 1120 | &tdata); |
| 1121 | |
| 1122 | if (status != PJ_SUCCESS) { |
| 1123 | |
| 1124 | /* Does not have proper credentials. |
| 1125 | * End the session. |
| 1126 | */ |
| 1127 | inv_set_state(s, PJSIP_INV_STATE_DISCONNECTED, e); |
| 1128 | |
| 1129 | } else { |
| 1130 | |
| 1131 | /* Restart session. */ |
| 1132 | s->state = PJSIP_INV_STATE_NULL; |
| 1133 | s->invite_tsx = NULL; |
| 1134 | |
| 1135 | /* Send the request. */ |
| 1136 | status = pjsip_inv_send_msg(s, tdata, NULL ); |
| 1137 | } |
| 1138 | |
Benny Prijono | 268ca61 | 2006-02-07 12:34:11 +0000 | [diff] [blame] | 1139 | } else { |
Benny Prijono | ccf9562 | 2006-02-07 18:48:01 +0000 | [diff] [blame^] | 1140 | |
Benny Prijono | 268ca61 | 2006-02-07 12:34:11 +0000 | [diff] [blame] | 1141 | inv_set_state(s, PJSIP_INV_STATE_DISCONNECTED, e); |
Benny Prijono | ccf9562 | 2006-02-07 18:48:01 +0000 | [diff] [blame^] | 1142 | |
Benny Prijono | 268ca61 | 2006-02-07 12:34:11 +0000 | [diff] [blame] | 1143 | } |
| 1144 | break; |
| 1145 | |
| 1146 | case PJSIP_TSX_STATE_TERMINATED: |
| 1147 | /* INVITE transaction can be terminated either because UAC |
| 1148 | * transaction received 2xx response or because of transport |
| 1149 | * error. |
| 1150 | */ |
| 1151 | if (tsx->status_code/100 == 2) { |
| 1152 | /* This must be receipt of 2xx response */ |
| 1153 | |
| 1154 | /* Set state to CONNECTING */ |
| 1155 | inv_set_state(s, PJSIP_INV_STATE_CONNECTING, e); |
| 1156 | |
| 1157 | /* Send ACK */ |
| 1158 | pj_assert(e->body.tsx_state.type == PJSIP_EVENT_RX_MSG); |
| 1159 | |
| 1160 | send_ack(s, e->body.tsx_state.src.rdata); |
| 1161 | |
| 1162 | } else { |
| 1163 | inv_set_state(s, PJSIP_INV_STATE_DISCONNECTED, e); |
Benny Prijono | 268ca61 | 2006-02-07 12:34:11 +0000 | [diff] [blame] | 1164 | } |
| 1165 | break; |
| 1166 | |
| 1167 | default: |
| 1168 | pj_assert(!"Unexpected state"); |
| 1169 | } |
| 1170 | |
| 1171 | } else { |
| 1172 | pj_assert(!"Unexpected transaction type"); |
| 1173 | } |
| 1174 | } |
| 1175 | |
| 1176 | static void inv_on_state_incoming( pjsip_inv_session *s, pjsip_event *e) |
| 1177 | { |
| 1178 | pjsip_transaction *tsx = e->body.tsx_state.tsx; |
| 1179 | pjsip_dialog *dlg = pjsip_tsx_get_dlg(tsx); |
| 1180 | |
| 1181 | PJ_ASSERT_ON_FAIL(tsx && dlg, return); |
| 1182 | |
Benny Prijono | ccf9562 | 2006-02-07 18:48:01 +0000 | [diff] [blame^] | 1183 | if (tsx == s->invite_tsx) { |
Benny Prijono | 268ca61 | 2006-02-07 12:34:11 +0000 | [diff] [blame] | 1184 | switch (tsx->state) { |
| 1185 | case PJSIP_TSX_STATE_PROCEEDING: |
| 1186 | if (tsx->status_code > 100) |
| 1187 | inv_set_state(s, PJSIP_INV_STATE_EARLY, e); |
| 1188 | break; |
| 1189 | case PJSIP_TSX_STATE_COMPLETED: |
| 1190 | if (tsx->status_code/100 == 2) |
| 1191 | inv_set_state(s, PJSIP_INV_STATE_CONNECTING, e); |
| 1192 | else |
| 1193 | inv_set_state(s, PJSIP_INV_STATE_DISCONNECTED, e); |
| 1194 | break; |
| 1195 | case PJSIP_TSX_STATE_TERMINATED: |
| 1196 | /* This happens on transport error */ |
| 1197 | inv_set_state(s, PJSIP_INV_STATE_DISCONNECTED, e); |
Benny Prijono | 268ca61 | 2006-02-07 12:34:11 +0000 | [diff] [blame] | 1198 | break; |
| 1199 | default: |
| 1200 | pj_assert(!"Unexpected state"); |
| 1201 | } |
| 1202 | } else { |
| 1203 | pj_assert(!"Unexpected transaction type"); |
| 1204 | } |
| 1205 | } |
| 1206 | |
| 1207 | static void inv_on_state_early( pjsip_inv_session *s, pjsip_event *e) |
| 1208 | { |
| 1209 | pjsip_transaction *tsx = e->body.tsx_state.tsx; |
| 1210 | pjsip_dialog *dlg = pjsip_tsx_get_dlg(tsx); |
| 1211 | |
| 1212 | PJ_ASSERT_ON_FAIL(tsx && dlg, return); |
| 1213 | |
Benny Prijono | ccf9562 | 2006-02-07 18:48:01 +0000 | [diff] [blame^] | 1214 | if (tsx == s->invite_tsx) { |
Benny Prijono | 268ca61 | 2006-02-07 12:34:11 +0000 | [diff] [blame] | 1215 | |
| 1216 | switch (tsx->state) { |
| 1217 | |
| 1218 | case PJSIP_TSX_STATE_PROCEEDING: |
| 1219 | /* Send/received another provisional response. */ |
| 1220 | inv_set_state(s, PJSIP_INV_STATE_EARLY, e); |
| 1221 | break; |
| 1222 | |
| 1223 | case PJSIP_TSX_STATE_COMPLETED: |
| 1224 | if (tsx->status_code/100 == 2) |
| 1225 | inv_set_state(s, PJSIP_INV_STATE_CONNECTING, e); |
| 1226 | else |
| 1227 | inv_set_state(s, PJSIP_INV_STATE_DISCONNECTED, e); |
| 1228 | break; |
| 1229 | |
| 1230 | case PJSIP_TSX_STATE_TERMINATED: |
| 1231 | /* INVITE transaction can be terminated either because UAC |
| 1232 | * transaction received 2xx response or because of transport |
| 1233 | * error. |
| 1234 | */ |
| 1235 | if (tsx->status_code/100 == 2) { |
| 1236 | |
| 1237 | /* This must be receipt of 2xx response */ |
| 1238 | |
| 1239 | /* Set state to CONNECTING */ |
| 1240 | inv_set_state(s, PJSIP_INV_STATE_CONNECTING, e); |
| 1241 | |
| 1242 | /* if UAC, send ACK and move state to confirmed. */ |
| 1243 | if (tsx->role == PJSIP_ROLE_UAC) { |
| 1244 | pj_assert(e->body.tsx_state.type == PJSIP_EVENT_RX_MSG); |
| 1245 | |
| 1246 | send_ack(s, e->body.tsx_state.src.rdata); |
| 1247 | |
| 1248 | inv_set_state(s, PJSIP_INV_STATE_CONFIRMED, e); |
| 1249 | } |
| 1250 | |
| 1251 | } else { |
| 1252 | inv_set_state(s, PJSIP_INV_STATE_DISCONNECTED, e); |
Benny Prijono | 268ca61 | 2006-02-07 12:34:11 +0000 | [diff] [blame] | 1253 | } |
| 1254 | break; |
| 1255 | |
| 1256 | default: |
| 1257 | pj_assert(!"Unexpected state"); |
| 1258 | } |
| 1259 | |
| 1260 | } else if (tsx->method.id == PJSIP_CANCEL_METHOD) { |
| 1261 | |
| 1262 | /* Handle incoming CANCEL request. */ |
| 1263 | if (tsx->role == PJSIP_ROLE_UAS && s->role == PJSIP_ROLE_UAS && |
| 1264 | e->body.tsx_state.type == PJSIP_EVENT_RX_MSG) |
| 1265 | { |
| 1266 | |
| 1267 | pj_status_t status; |
| 1268 | pjsip_tx_data *tdata; |
| 1269 | |
| 1270 | /* Respond CANCEL with 200 (OK) */ |
| 1271 | status = pjsip_dlg_create_response(dlg, e->body.tsx_state.src.rdata, |
| 1272 | 200, NULL, &tdata); |
| 1273 | if (status == PJ_SUCCESS) { |
| 1274 | pjsip_dlg_send_response(dlg, tsx, tdata); |
| 1275 | } |
| 1276 | |
| 1277 | /* Respond the original UAS transaction with 487 (Request |
| 1278 | * Terminated) response. |
| 1279 | */ |
| 1280 | pj_assert(s->invite_tsx && s->invite_tsx->last_tx); |
| 1281 | tdata = s->invite_tsx->last_tx; |
| 1282 | |
| 1283 | status = pjsip_dlg_modify_response(dlg, tdata, 487, NULL); |
| 1284 | if (status == PJ_SUCCESS) { |
| 1285 | pjsip_dlg_send_response(dlg, s->invite_tsx, tdata); |
| 1286 | } |
| 1287 | } |
| 1288 | |
Benny Prijono | ccf9562 | 2006-02-07 18:48:01 +0000 | [diff] [blame^] | 1289 | } else if (tsx->method.id == PJSIP_INVITE_METHOD) { |
| 1290 | |
| 1291 | /* Ignore previously failed INVITE transaction event |
| 1292 | * (e.g. when rejected with 401/407) |
| 1293 | */ |
| 1294 | |
Benny Prijono | 268ca61 | 2006-02-07 12:34:11 +0000 | [diff] [blame] | 1295 | } else { |
| 1296 | pj_assert(!"Unexpected transaction type"); |
| 1297 | } |
| 1298 | } |
| 1299 | |
| 1300 | static void inv_on_state_connecting( pjsip_inv_session *s, pjsip_event *e) |
| 1301 | { |
| 1302 | pjsip_transaction *tsx = e->body.tsx_state.tsx; |
| 1303 | pjsip_dialog *dlg = pjsip_tsx_get_dlg(tsx); |
| 1304 | |
| 1305 | PJ_ASSERT_ON_FAIL(tsx && dlg, return); |
| 1306 | |
Benny Prijono | ccf9562 | 2006-02-07 18:48:01 +0000 | [diff] [blame^] | 1307 | if (tsx == s->invite_tsx) { |
Benny Prijono | 268ca61 | 2006-02-07 12:34:11 +0000 | [diff] [blame] | 1308 | |
| 1309 | switch (tsx->state) { |
| 1310 | |
| 1311 | case PJSIP_TSX_STATE_CONFIRMED: |
| 1312 | break; |
| 1313 | |
| 1314 | case PJSIP_TSX_STATE_TERMINATED: |
| 1315 | /* INVITE transaction can be terminated either because UAC |
| 1316 | * transaction received 2xx response or because of transport |
| 1317 | * error. |
| 1318 | */ |
| 1319 | if (tsx->status_code/100 != 2) { |
| 1320 | inv_set_state(s, PJSIP_INV_STATE_DISCONNECTED, e); |
Benny Prijono | 268ca61 | 2006-02-07 12:34:11 +0000 | [diff] [blame] | 1321 | } |
| 1322 | break; |
| 1323 | |
| 1324 | case PJSIP_TSX_STATE_DESTROYED: |
| 1325 | /* Do nothing. */ |
| 1326 | break; |
| 1327 | |
| 1328 | default: |
| 1329 | pj_assert(!"Unexpected state"); |
| 1330 | } |
| 1331 | |
| 1332 | } else { |
| 1333 | pj_assert(!"Unexpected transaction type"); |
| 1334 | } |
| 1335 | } |
| 1336 | |
| 1337 | static void inv_on_state_confirmed( pjsip_inv_session *s, pjsip_event *e) |
| 1338 | { |
| 1339 | pjsip_transaction *tsx = e->body.tsx_state.tsx; |
| 1340 | pjsip_dialog *dlg = pjsip_tsx_get_dlg(tsx); |
| 1341 | |
| 1342 | PJ_ASSERT_ON_FAIL(tsx && dlg, return); |
| 1343 | |
| 1344 | if (tsx->method.id == PJSIP_BYE_METHOD) { |
| 1345 | inv_set_state(s, PJSIP_INV_STATE_DISCONNECTED, e); |
| 1346 | |
Benny Prijono | ccf9562 | 2006-02-07 18:48:01 +0000 | [diff] [blame^] | 1347 | } else if (tsx == s->invite_tsx) { |
Benny Prijono | 268ca61 | 2006-02-07 12:34:11 +0000 | [diff] [blame] | 1348 | |
| 1349 | switch (tsx->state) { |
| 1350 | case PJSIP_TSX_STATE_TERMINATED: |
| 1351 | case PJSIP_TSX_STATE_DESTROYED: |
| 1352 | break; |
| 1353 | default: |
| 1354 | pj_assert(!"Unexpected state"); |
| 1355 | break; |
| 1356 | } |
| 1357 | |
Benny Prijono | ccf9562 | 2006-02-07 18:48:01 +0000 | [diff] [blame^] | 1358 | } else if (tsx->method.id == PJSIP_INVITE_METHOD) { |
| 1359 | |
| 1360 | /* Re-INVITE */ |
Benny Prijono | 268ca61 | 2006-02-07 12:34:11 +0000 | [diff] [blame] | 1361 | |
| 1362 | } else { |
| 1363 | pj_assert(!"Unexpected transaction type"); |
| 1364 | } |
| 1365 | } |
| 1366 | |
| 1367 | static void inv_on_state_disconnected( pjsip_inv_session *s, pjsip_event *e) |
| 1368 | { |
| 1369 | PJ_UNUSED_ARG(s); |
| 1370 | PJ_UNUSED_ARG(e); |
| 1371 | } |
| 1372 | |
| 1373 | static void inv_on_state_terminated( pjsip_inv_session *s, pjsip_event *e) |
| 1374 | { |
| 1375 | PJ_UNUSED_ARG(s); |
| 1376 | PJ_UNUSED_ARG(e); |
| 1377 | } |
| 1378 | |