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 <pjmedia/sdp.h> |
| 21 | #include <pjmedia/errno.h> |
| 22 | #include <pjlib-util/scanner.h> |
| 23 | #include <pj/array.h> |
| 24 | #include <pj/except.h> |
| 25 | #include <pj/log.h> |
| 26 | #include <pj/os.h> |
| 27 | #include <pj/string.h> |
| 28 | #include <pj/pool.h> |
| 29 | #include <pj/assert.h> |
| 30 | #include <pj/ctype.h> |
| 31 | |
| 32 | |
| 33 | enum { |
| 34 | SKIP_WS = 0, |
| 35 | SYNTAX_ERROR = 1, |
| 36 | }; |
| 37 | // New token definition from RFC 4566 (SDP) |
| 38 | #define TOKEN "!#$%&'*+-.^_`{|}~" |
| 39 | //#define TOKEN "-.!%*_=`'~" |
| 40 | //#define TOKEN "'`-./:?\"#$&*;=@[]^_`{|}+~!" |
| 41 | #define NTP_OFFSET ((pj_uint32_t)2208988800) |
| 42 | #define THIS_FILE "sdp.c" |
| 43 | |
| 44 | typedef struct parse_context |
| 45 | { |
| 46 | pj_status_t last_error; |
| 47 | } parse_context; |
| 48 | |
| 49 | |
| 50 | /* |
| 51 | * Prototypes for line parser. |
| 52 | */ |
| 53 | static void parse_version(pj_scanner *scanner, parse_context *ctx); |
| 54 | static void parse_origin(pj_scanner *scanner, pjmedia_sdp_session *ses, |
| 55 | parse_context *ctx); |
| 56 | static void parse_time(pj_scanner *scanner, pjmedia_sdp_session *ses, |
| 57 | parse_context *ctx); |
| 58 | static void parse_generic_line(pj_scanner *scanner, pj_str_t *str, |
| 59 | parse_context *ctx); |
| 60 | static void parse_connection_info(pj_scanner *scanner, pjmedia_sdp_conn *conn, |
| 61 | parse_context *ctx); |
| 62 | static void parse_bandwidth_info(pj_scanner *scanner, pjmedia_sdp_bandw *bandw, |
| 63 | parse_context *ctx); |
| 64 | static pjmedia_sdp_attr *parse_attr(pj_pool_t *pool, pj_scanner *scanner, |
| 65 | parse_context *ctx); |
| 66 | static void parse_media(pj_scanner *scanner, pjmedia_sdp_media *med, |
| 67 | parse_context *ctx); |
| 68 | static void on_scanner_error(pj_scanner *scanner); |
| 69 | |
| 70 | /* |
| 71 | * Scanner character specification. |
| 72 | */ |
| 73 | static int is_initialized; |
| 74 | static pj_cis_buf_t cis_buf; |
| 75 | static pj_cis_t cs_digit, cs_token; |
| 76 | |
| 77 | static void init_sdp_parser(void) |
| 78 | { |
| 79 | if (is_initialized != 0) |
| 80 | return; |
| 81 | |
| 82 | pj_enter_critical_section(); |
| 83 | |
| 84 | if (is_initialized != 0) { |
| 85 | pj_leave_critical_section(); |
| 86 | return; |
| 87 | } |
| 88 | |
| 89 | pj_cis_buf_init(&cis_buf); |
| 90 | |
| 91 | pj_cis_init(&cis_buf, &cs_token); |
| 92 | pj_cis_add_alpha(&cs_token); |
| 93 | pj_cis_add_num(&cs_token); |
| 94 | pj_cis_add_str(&cs_token, TOKEN); |
| 95 | |
| 96 | pj_cis_init(&cis_buf, &cs_digit); |
| 97 | pj_cis_add_num(&cs_digit); |
| 98 | |
| 99 | is_initialized = 1; |
| 100 | pj_leave_critical_section(); |
| 101 | } |
| 102 | |
| 103 | PJ_DEF(pjmedia_sdp_attr*) pjmedia_sdp_attr_create( pj_pool_t *pool, |
| 104 | const char *name, |
| 105 | const pj_str_t *value) |
| 106 | { |
| 107 | pjmedia_sdp_attr *attr; |
| 108 | |
| 109 | PJ_ASSERT_RETURN(pool && name, NULL); |
| 110 | |
| 111 | attr = PJ_POOL_ALLOC_T(pool, pjmedia_sdp_attr); |
| 112 | pj_strdup2(pool, &attr->name, name); |
| 113 | |
| 114 | if (value) |
| 115 | pj_strdup_with_null(pool, &attr->value, value); |
| 116 | else { |
| 117 | attr->value.ptr = NULL; |
| 118 | attr->value.slen = 0; |
| 119 | } |
| 120 | |
| 121 | return attr; |
| 122 | } |
| 123 | |
| 124 | PJ_DEF(pjmedia_sdp_attr*) pjmedia_sdp_attr_clone(pj_pool_t *pool, |
| 125 | const pjmedia_sdp_attr *rhs) |
| 126 | { |
| 127 | pjmedia_sdp_attr *attr; |
| 128 | |
| 129 | PJ_ASSERT_RETURN(pool && rhs, NULL); |
| 130 | |
| 131 | attr = PJ_POOL_ALLOC_T(pool, pjmedia_sdp_attr); |
| 132 | |
| 133 | pj_strdup(pool, &attr->name, &rhs->name); |
| 134 | pj_strdup_with_null(pool, &attr->value, &rhs->value); |
| 135 | |
| 136 | return attr; |
| 137 | } |
| 138 | |
| 139 | PJ_DEF(pjmedia_sdp_attr*) pjmedia_sdp_attr_find (unsigned count, |
| 140 | pjmedia_sdp_attr *const attr_array[], |
| 141 | const pj_str_t *name, |
| 142 | const pj_str_t *c_fmt) |
| 143 | { |
| 144 | unsigned i; |
| 145 | unsigned c_pt = 0xFFFF; |
| 146 | |
| 147 | if (c_fmt) |
| 148 | c_pt = pj_strtoul(c_fmt); |
| 149 | |
| 150 | for (i=0; i<count; ++i) { |
| 151 | if (pj_strcmp(&attr_array[i]->name, name) == 0) { |
| 152 | const pjmedia_sdp_attr *a = attr_array[i]; |
| 153 | if (c_fmt) { |
| 154 | unsigned pt = (unsigned) pj_strtoul2(&a->value, NULL, 10); |
| 155 | if (pt == c_pt) { |
| 156 | return (pjmedia_sdp_attr*)a; |
| 157 | } |
| 158 | } else |
| 159 | return (pjmedia_sdp_attr*)a; |
| 160 | } |
| 161 | } |
| 162 | return NULL; |
| 163 | } |
| 164 | |
| 165 | PJ_DEF(pjmedia_sdp_attr*) pjmedia_sdp_attr_find2(unsigned count, |
| 166 | pjmedia_sdp_attr *const attr_array[], |
| 167 | const char *c_name, |
| 168 | const pj_str_t *c_fmt) |
| 169 | { |
| 170 | pj_str_t name; |
| 171 | |
| 172 | name.ptr = (char*)c_name; |
| 173 | name.slen = pj_ansi_strlen(c_name); |
| 174 | |
| 175 | return pjmedia_sdp_attr_find(count, attr_array, &name, c_fmt); |
| 176 | } |
| 177 | |
| 178 | |
| 179 | |
| 180 | PJ_DEF(pj_status_t) pjmedia_sdp_attr_add(unsigned *count, |
| 181 | pjmedia_sdp_attr *attr_array[], |
| 182 | pjmedia_sdp_attr *attr) |
| 183 | { |
| 184 | PJ_ASSERT_RETURN(count && attr_array && attr, PJ_EINVAL); |
| 185 | PJ_ASSERT_RETURN(*count < PJMEDIA_MAX_SDP_ATTR, PJ_ETOOMANY); |
| 186 | |
| 187 | attr_array[*count] = attr; |
| 188 | (*count)++; |
| 189 | |
| 190 | return PJ_SUCCESS; |
| 191 | } |
| 192 | |
| 193 | |
| 194 | PJ_DEF(unsigned) pjmedia_sdp_attr_remove_all(unsigned *count, |
| 195 | pjmedia_sdp_attr *attr_array[], |
| 196 | const char *name) |
| 197 | { |
| 198 | unsigned i, removed = 0; |
| 199 | pj_str_t attr_name; |
| 200 | |
| 201 | PJ_ASSERT_RETURN(count && attr_array && name, PJ_EINVAL); |
| 202 | |
| 203 | attr_name.ptr = (char*)name; |
| 204 | attr_name.slen = pj_ansi_strlen(name); |
| 205 | |
| 206 | for (i=0; i<*count; ) { |
| 207 | if (pj_strcmp(&attr_array[i]->name, &attr_name)==0) { |
| 208 | pj_array_erase(attr_array, sizeof(pjmedia_sdp_attr*), |
| 209 | *count, i); |
| 210 | --(*count); |
| 211 | ++removed; |
| 212 | } else { |
| 213 | ++i; |
| 214 | } |
| 215 | } |
| 216 | |
| 217 | return removed; |
| 218 | } |
| 219 | |
| 220 | |
| 221 | PJ_DEF(pj_status_t) pjmedia_sdp_attr_remove( unsigned *count, |
| 222 | pjmedia_sdp_attr *attr_array[], |
| 223 | pjmedia_sdp_attr *attr ) |
| 224 | { |
| 225 | unsigned i, removed=0; |
| 226 | |
| 227 | PJ_ASSERT_RETURN(count && attr_array && attr, PJ_EINVAL); |
| 228 | |
| 229 | for (i=0; i<*count; ) { |
| 230 | if (attr_array[i] == attr) { |
| 231 | pj_array_erase(attr_array, sizeof(pjmedia_sdp_attr*), |
| 232 | *count, i); |
| 233 | --(*count); |
| 234 | ++removed; |
| 235 | } else { |
| 236 | ++i; |
| 237 | } |
| 238 | } |
| 239 | |
| 240 | return removed ? PJ_SUCCESS : PJ_ENOTFOUND; |
| 241 | } |
| 242 | |
| 243 | |
| 244 | PJ_DEF(pj_status_t) pjmedia_sdp_attr_get_rtpmap( const pjmedia_sdp_attr *attr, |
| 245 | pjmedia_sdp_rtpmap *rtpmap) |
| 246 | { |
| 247 | pj_scanner scanner; |
| 248 | pj_str_t token; |
| 249 | pj_status_t status = -1; |
| 250 | char term = 0; |
| 251 | PJ_USE_EXCEPTION; |
| 252 | |
| 253 | PJ_ASSERT_RETURN(pj_strcmp2(&attr->name, "rtpmap")==0, PJ_EINVALIDOP); |
| 254 | |
| 255 | PJ_ASSERT_RETURN(attr->value.slen != 0, PJMEDIA_SDP_EINATTR); |
| 256 | |
| 257 | init_sdp_parser(); |
| 258 | |
| 259 | /* Check if input is null terminated, and null terminate if |
| 260 | * necessary. Unfortunately this may crash the application if |
| 261 | * attribute was allocated from a read-only memory location. |
| 262 | * But this shouldn't happen as attribute's value normally is |
| 263 | * null terminated. |
| 264 | */ |
| 265 | if (attr->value.ptr[attr->value.slen] != 0 && |
| 266 | attr->value.ptr[attr->value.slen] != '\r' && |
| 267 | attr->value.ptr[attr->value.slen] != '\n') |
| 268 | { |
| 269 | pj_assert(!"Shouldn't happen"); |
| 270 | term = attr->value.ptr[attr->value.slen]; |
| 271 | attr->value.ptr[attr->value.slen] = '\0'; |
| 272 | } |
| 273 | |
| 274 | pj_scan_init(&scanner, (char*)attr->value.ptr, attr->value.slen, |
| 275 | PJ_SCAN_AUTOSKIP_WS, &on_scanner_error); |
| 276 | |
| 277 | /* rtpmap sample: |
| 278 | * a=rtpmap:98 L16/16000/2. |
| 279 | */ |
| 280 | |
| 281 | /* Init */ |
| 282 | rtpmap->pt.slen = rtpmap->param.slen = rtpmap->enc_name.slen = 0; |
| 283 | rtpmap->clock_rate = 0; |
| 284 | |
| 285 | /* Parse */ |
| 286 | PJ_TRY { |
| 287 | |
| 288 | /* Get payload type. */ |
| 289 | pj_scan_get(&scanner, &cs_token, &rtpmap->pt); |
| 290 | |
| 291 | |
| 292 | /* Get encoding name. */ |
| 293 | pj_scan_get(&scanner, &cs_token, &rtpmap->enc_name); |
| 294 | |
| 295 | /* Expecting '/' after encoding name. */ |
| 296 | if (pj_scan_get_char(&scanner) != '/') { |
| 297 | status = PJMEDIA_SDP_EINRTPMAP; |
| 298 | goto on_return; |
| 299 | } |
| 300 | |
| 301 | |
| 302 | /* Get the clock rate. */ |
| 303 | pj_scan_get(&scanner, &cs_digit, &token); |
| 304 | rtpmap->clock_rate = pj_strtoul(&token); |
| 305 | |
| 306 | /* Expecting either '/' or EOF */ |
| 307 | if (*scanner.curptr == '/') { |
| 308 | pj_scan_get_char(&scanner); |
| 309 | rtpmap->param.ptr = scanner.curptr; |
| 310 | rtpmap->param.slen = scanner.end - scanner.curptr; |
| 311 | } else { |
| 312 | rtpmap->param.slen = 0; |
| 313 | } |
| 314 | |
| 315 | status = PJ_SUCCESS; |
| 316 | } |
| 317 | PJ_CATCH_ANY { |
| 318 | status = PJMEDIA_SDP_EINRTPMAP; |
| 319 | } |
| 320 | PJ_END; |
| 321 | |
| 322 | |
| 323 | on_return: |
| 324 | pj_scan_fini(&scanner); |
| 325 | if (term) { |
| 326 | attr->value.ptr[attr->value.slen] = term; |
| 327 | } |
| 328 | return status; |
| 329 | } |
| 330 | |
| 331 | PJ_DEF(pj_status_t) pjmedia_sdp_attr_get_fmtp( const pjmedia_sdp_attr *attr, |
| 332 | pjmedia_sdp_fmtp *fmtp) |
| 333 | { |
| 334 | const char *p = attr->value.ptr; |
| 335 | const char *end = attr->value.ptr + attr->value.slen; |
| 336 | pj_str_t token; |
| 337 | |
| 338 | PJ_ASSERT_RETURN(pj_strcmp2(&attr->name, "fmtp")==0, PJ_EINVALIDOP); |
| 339 | |
| 340 | /* fmtp BNF: |
| 341 | * a=fmtp:<format> <format specific parameter> |
| 342 | */ |
| 343 | |
| 344 | /* Get format. */ |
| 345 | token.ptr = (char*)p; |
| 346 | while (pj_isdigit(*p) && p!=end) |
| 347 | ++p; |
| 348 | token.slen = p - token.ptr; |
| 349 | if (token.slen == 0) |
| 350 | return PJMEDIA_SDP_EINFMTP; |
| 351 | |
| 352 | fmtp->fmt = token; |
| 353 | |
| 354 | /* Expecting space after format. */ |
| 355 | if (*p != ' ') return PJMEDIA_SDP_EINFMTP; |
| 356 | |
| 357 | /* Get space. */ |
| 358 | ++p; |
| 359 | |
| 360 | /* Set the remaining string as fmtp format parameter. */ |
| 361 | fmtp->fmt_param.ptr = (char*)p; |
| 362 | fmtp->fmt_param.slen = end - p; |
| 363 | |
| 364 | return PJ_SUCCESS; |
| 365 | } |
| 366 | |
| 367 | |
| 368 | PJ_DEF(pj_status_t) pjmedia_sdp_attr_get_rtcp(const pjmedia_sdp_attr *attr, |
| 369 | pjmedia_sdp_rtcp_attr *rtcp) |
| 370 | { |
| 371 | pj_scanner scanner; |
| 372 | pj_str_t token; |
| 373 | pj_status_t status = -1; |
| 374 | PJ_USE_EXCEPTION; |
| 375 | |
| 376 | PJ_ASSERT_RETURN(pj_strcmp2(&attr->name, "rtcp")==0, PJ_EINVALIDOP); |
| 377 | |
| 378 | init_sdp_parser(); |
| 379 | |
| 380 | /* fmtp BNF: |
| 381 | * a=rtcp:<port> [nettype addrtype address] |
| 382 | */ |
| 383 | |
| 384 | pj_scan_init(&scanner, (char*)attr->value.ptr, attr->value.slen, |
| 385 | PJ_SCAN_AUTOSKIP_WS, &on_scanner_error); |
| 386 | |
| 387 | /* Init */ |
| 388 | rtcp->net_type.slen = rtcp->addr_type.slen = rtcp->addr.slen = 0; |
| 389 | |
| 390 | /* Parse */ |
| 391 | PJ_TRY { |
| 392 | |
| 393 | /* Get the port */ |
| 394 | pj_scan_get(&scanner, &cs_token, &token); |
| 395 | rtcp->port = pj_strtoul(&token); |
| 396 | |
| 397 | /* Have address? */ |
| 398 | if (!pj_scan_is_eof(&scanner)) { |
| 399 | |
| 400 | /* Get network type */ |
| 401 | pj_scan_get(&scanner, &cs_token, &rtcp->net_type); |
| 402 | |
| 403 | /* Get address type */ |
| 404 | pj_scan_get(&scanner, &cs_token, &rtcp->addr_type); |
| 405 | |
| 406 | /* Get the address */ |
| 407 | pj_scan_get(&scanner, &cs_token, &rtcp->addr); |
| 408 | |
| 409 | } |
| 410 | |
| 411 | status = PJ_SUCCESS; |
| 412 | |
| 413 | } |
| 414 | PJ_CATCH_ANY { |
| 415 | status = PJMEDIA_SDP_EINRTCP; |
| 416 | } |
| 417 | PJ_END; |
| 418 | |
| 419 | pj_scan_fini(&scanner); |
| 420 | return status; |
| 421 | } |
| 422 | |
| 423 | |
| 424 | PJ_DEF(pjmedia_sdp_attr*) pjmedia_sdp_attr_create_rtcp(pj_pool_t *pool, |
| 425 | const pj_sockaddr *a) |
| 426 | { |
| 427 | enum { |
| 428 | ATTR_LEN = PJ_INET6_ADDRSTRLEN+16 |
| 429 | }; |
| 430 | pjmedia_sdp_attr *attr; |
| 431 | |
| 432 | attr = PJ_POOL_ALLOC_T(pool, pjmedia_sdp_attr); |
| 433 | attr->name = pj_str("rtcp"); |
| 434 | attr->value.ptr = (char*) pj_pool_alloc(pool, ATTR_LEN); |
| 435 | if (a->addr.sa_family == pj_AF_INET()) { |
| 436 | attr->value.slen = |
| 437 | pj_ansi_snprintf(attr->value.ptr, ATTR_LEN, |
| 438 | "%u IN IP4 %s", |
| 439 | pj_ntohs(a->ipv4.sin_port), |
| 440 | pj_inet_ntoa(a->ipv4.sin_addr)); |
| 441 | } else if (a->addr.sa_family == pj_AF_INET6()) { |
| 442 | char tmp_addr[PJ_INET6_ADDRSTRLEN]; |
| 443 | attr->value.slen = |
| 444 | pj_ansi_snprintf(attr->value.ptr, ATTR_LEN, |
| 445 | "%u IN IP6 %s", |
| 446 | pj_sockaddr_get_port(a), |
| 447 | pj_sockaddr_print(a, tmp_addr, |
| 448 | sizeof(tmp_addr), 0)); |
| 449 | |
| 450 | } else { |
| 451 | pj_assert(!"Unsupported address family"); |
| 452 | return NULL; |
| 453 | } |
| 454 | |
| 455 | return attr; |
| 456 | } |
| 457 | |
| 458 | |
| 459 | PJ_DEF(pj_status_t) pjmedia_sdp_attr_to_rtpmap(pj_pool_t *pool, |
| 460 | const pjmedia_sdp_attr *attr, |
| 461 | pjmedia_sdp_rtpmap **p_rtpmap) |
| 462 | { |
| 463 | PJ_ASSERT_RETURN(pool && attr && p_rtpmap, PJ_EINVAL); |
| 464 | |
| 465 | *p_rtpmap = PJ_POOL_ALLOC_T(pool, pjmedia_sdp_rtpmap); |
| 466 | PJ_ASSERT_RETURN(*p_rtpmap, PJ_ENOMEM); |
| 467 | |
| 468 | return pjmedia_sdp_attr_get_rtpmap(attr, *p_rtpmap); |
| 469 | } |
| 470 | |
| 471 | |
| 472 | PJ_DEF(pj_status_t) pjmedia_sdp_rtpmap_to_attr(pj_pool_t *pool, |
| 473 | const pjmedia_sdp_rtpmap *rtpmap, |
| 474 | pjmedia_sdp_attr **p_attr) |
| 475 | { |
| 476 | pjmedia_sdp_attr *attr; |
| 477 | char tempbuf[128]; |
| 478 | int len; |
| 479 | |
| 480 | /* Check arguments. */ |
| 481 | PJ_ASSERT_RETURN(pool && rtpmap && p_attr, PJ_EINVAL); |
| 482 | |
| 483 | /* Check that mandatory attributes are specified. */ |
| 484 | PJ_ASSERT_RETURN(rtpmap->enc_name.slen && rtpmap->clock_rate, |
| 485 | PJMEDIA_SDP_EINRTPMAP); |
| 486 | |
| 487 | |
| 488 | attr = PJ_POOL_ALLOC_T(pool, pjmedia_sdp_attr); |
| 489 | PJ_ASSERT_RETURN(attr != NULL, PJ_ENOMEM); |
| 490 | |
| 491 | attr->name.ptr = "rtpmap"; |
| 492 | attr->name.slen = 6; |
| 493 | |
| 494 | /* Format: ":pt enc_name/clock_rate[/param]" */ |
| 495 | len = pj_ansi_snprintf(tempbuf, sizeof(tempbuf), |
| 496 | "%.*s %.*s/%u%s%.*s", |
| 497 | (int)rtpmap->pt.slen, |
| 498 | rtpmap->pt.ptr, |
| 499 | (int)rtpmap->enc_name.slen, |
| 500 | rtpmap->enc_name.ptr, |
| 501 | rtpmap->clock_rate, |
| 502 | (rtpmap->param.slen ? "/" : ""), |
| 503 | (int)rtpmap->param.slen, |
| 504 | rtpmap->param.ptr); |
| 505 | |
| 506 | if (len < 1 || len > (int)sizeof(tempbuf)) |
| 507 | return PJMEDIA_SDP_ERTPMAPTOOLONG; |
| 508 | |
| 509 | attr->value.slen = len; |
| 510 | attr->value.ptr = (char*) pj_pool_alloc(pool, attr->value.slen+1); |
| 511 | pj_memcpy(attr->value.ptr, tempbuf, attr->value.slen+1); |
| 512 | |
| 513 | *p_attr = attr; |
| 514 | return PJ_SUCCESS; |
| 515 | } |
| 516 | |
| 517 | |
| 518 | static int print_connection_info( pjmedia_sdp_conn *c, char *buf, int len) |
| 519 | { |
| 520 | int printed; |
| 521 | |
| 522 | printed = pj_ansi_snprintf(buf, len, "c=%.*s %.*s %.*s\r\n", |
| 523 | (int)c->net_type.slen, |
| 524 | c->net_type.ptr, |
| 525 | (int)c->addr_type.slen, |
| 526 | c->addr_type.ptr, |
| 527 | (int)c->addr.slen, |
| 528 | c->addr.ptr); |
| 529 | if (printed < 1 || printed > len) |
| 530 | return -1; |
| 531 | |
| 532 | return printed; |
| 533 | } |
| 534 | |
| 535 | |
| 536 | PJ_DEF(pjmedia_sdp_conn*) pjmedia_sdp_conn_clone (pj_pool_t *pool, |
| 537 | const pjmedia_sdp_conn *rhs) |
| 538 | { |
| 539 | pjmedia_sdp_conn *c = PJ_POOL_ALLOC_T(pool, pjmedia_sdp_conn); |
| 540 | if (!c) return NULL; |
| 541 | |
| 542 | if (!pj_strdup (pool, &c->net_type, &rhs->net_type)) return NULL; |
| 543 | if (!pj_strdup (pool, &c->addr_type, &rhs->addr_type)) return NULL; |
| 544 | if (!pj_strdup (pool, &c->addr, &rhs->addr)) return NULL; |
| 545 | |
| 546 | return c; |
| 547 | } |
| 548 | |
| 549 | PJ_DEF(pjmedia_sdp_bandw*) |
| 550 | pjmedia_sdp_bandw_clone (pj_pool_t *pool, |
| 551 | const pjmedia_sdp_bandw *rhs) |
| 552 | { |
| 553 | pjmedia_sdp_bandw *b = PJ_POOL_ALLOC_T(pool, pjmedia_sdp_bandw); |
| 554 | if (!b) return NULL; |
| 555 | |
| 556 | if (!pj_strdup (pool, &b->modifier, &rhs->modifier)) return NULL; |
| 557 | b->value = rhs->value; |
| 558 | |
| 559 | return b; |
| 560 | } |
| 561 | |
| 562 | static pj_ssize_t print_bandw(const pjmedia_sdp_bandw *bandw, |
| 563 | char *buf, pj_size_t len) |
| 564 | { |
| 565 | char *p = buf; |
| 566 | |
| 567 | if ((int)len < bandw->modifier.slen + 10 + 5) |
| 568 | return -1; |
| 569 | |
| 570 | *p++ = 'b'; |
| 571 | *p++ = '='; |
| 572 | pj_memcpy(p, bandw->modifier.ptr, bandw->modifier.slen); |
| 573 | p += bandw->modifier.slen; |
| 574 | *p++ = ':'; |
| 575 | p += pj_utoa(bandw->value, p); |
| 576 | |
| 577 | *p++ = '\r'; |
| 578 | *p++ = '\n'; |
| 579 | return p-buf; |
| 580 | } |
| 581 | |
| 582 | static pj_ssize_t print_attr(const pjmedia_sdp_attr *attr, |
| 583 | char *buf, pj_size_t len) |
| 584 | { |
| 585 | char *p = buf; |
| 586 | |
| 587 | if ((int)len < attr->name.slen + attr->value.slen + 10) |
| 588 | return -1; |
| 589 | |
| 590 | *p++ = 'a'; |
| 591 | *p++ = '='; |
| 592 | pj_memcpy(p, attr->name.ptr, attr->name.slen); |
| 593 | p += attr->name.slen; |
| 594 | |
| 595 | |
| 596 | if (attr->value.slen) { |
| 597 | *p++ = ':'; |
| 598 | pj_memcpy(p, attr->value.ptr, attr->value.slen); |
| 599 | p += attr->value.slen; |
| 600 | } |
| 601 | |
| 602 | *p++ = '\r'; |
| 603 | *p++ = '\n'; |
| 604 | return p-buf; |
| 605 | } |
| 606 | |
| 607 | static int print_media_desc( pjmedia_sdp_media *m, char *buf, int len) |
| 608 | { |
| 609 | char *p = buf; |
| 610 | char *end = buf+len; |
| 611 | unsigned i; |
| 612 | int printed; |
| 613 | |
| 614 | /* check length for the "m=" line. */ |
| 615 | if (len < m->desc.media.slen+m->desc.transport.slen+12+24) { |
| 616 | return -1; |
| 617 | } |
| 618 | *p++ = 'm'; /* m= */ |
| 619 | *p++ = '='; |
| 620 | pj_memcpy(p, m->desc.media.ptr, m->desc.media.slen); |
| 621 | p += m->desc.media.slen; |
| 622 | *p++ = ' '; |
| 623 | printed = pj_utoa(m->desc.port, p); |
| 624 | p += printed; |
| 625 | if (m->desc.port_count > 1) { |
| 626 | *p++ = '/'; |
| 627 | printed = pj_utoa(m->desc.port_count, p); |
| 628 | p += printed; |
| 629 | } |
| 630 | *p++ = ' '; |
| 631 | pj_memcpy(p, m->desc.transport.ptr, m->desc.transport.slen); |
| 632 | p += m->desc.transport.slen; |
| 633 | for (i=0; i<m->desc.fmt_count; ++i) { |
| 634 | *p++ = ' '; |
| 635 | pj_memcpy(p, m->desc.fmt[i].ptr, m->desc.fmt[i].slen); |
| 636 | p += m->desc.fmt[i].slen; |
| 637 | } |
| 638 | *p++ = '\r'; |
| 639 | *p++ = '\n'; |
| 640 | |
| 641 | /* print connection info, if present. */ |
| 642 | if (m->conn) { |
| 643 | printed = print_connection_info(m->conn, p, (int)(end-p)); |
| 644 | if (printed < 0) { |
| 645 | return -1; |
| 646 | } |
| 647 | p += printed; |
| 648 | } |
| 649 | |
| 650 | /* print optional bandwidth info. */ |
| 651 | for (i=0; i<m->bandw_count; ++i) { |
| 652 | printed = (int)print_bandw(m->bandw[i], p, end-p); |
| 653 | if (printed < 0) { |
| 654 | return -1; |
| 655 | } |
| 656 | p += printed; |
| 657 | } |
| 658 | |
| 659 | /* print attributes. */ |
| 660 | for (i=0; i<m->attr_count; ++i) { |
| 661 | printed = (int)print_attr(m->attr[i], p, end-p); |
| 662 | if (printed < 0) { |
| 663 | return -1; |
| 664 | } |
| 665 | p += printed; |
| 666 | } |
| 667 | |
| 668 | return (int)(p-buf); |
| 669 | } |
| 670 | |
| 671 | PJ_DEF(pjmedia_sdp_media*) pjmedia_sdp_media_clone( |
| 672 | pj_pool_t *pool, |
| 673 | const pjmedia_sdp_media *rhs) |
| 674 | { |
| 675 | unsigned int i; |
| 676 | pjmedia_sdp_media *m = PJ_POOL_ALLOC_T(pool, pjmedia_sdp_media); |
| 677 | PJ_ASSERT_RETURN(m != NULL, NULL); |
| 678 | |
| 679 | pj_strdup (pool, &m->desc.media, &rhs->desc.media); |
| 680 | m->desc.port = rhs->desc.port; |
| 681 | m->desc.port_count = rhs->desc.port_count; |
| 682 | pj_strdup (pool, &m->desc.transport, &rhs->desc.transport); |
| 683 | m->desc.fmt_count = rhs->desc.fmt_count; |
| 684 | for (i=0; i<rhs->desc.fmt_count; ++i) |
| 685 | pj_strdup(pool, &m->desc.fmt[i], &rhs->desc.fmt[i]); |
| 686 | |
| 687 | if (rhs->conn) { |
| 688 | m->conn = pjmedia_sdp_conn_clone (pool, rhs->conn); |
| 689 | PJ_ASSERT_RETURN(m->conn != NULL, NULL); |
| 690 | } else { |
| 691 | m->conn = NULL; |
| 692 | } |
| 693 | |
| 694 | m->bandw_count = rhs->bandw_count; |
| 695 | for (i=0; i < rhs->bandw_count; ++i) { |
| 696 | m->bandw[i] = pjmedia_sdp_bandw_clone (pool, rhs->bandw[i]); |
| 697 | PJ_ASSERT_RETURN(m->bandw[i] != NULL, NULL); |
| 698 | } |
| 699 | |
| 700 | m->attr_count = rhs->attr_count; |
| 701 | for (i=0; i < rhs->attr_count; ++i) { |
| 702 | m->attr[i] = pjmedia_sdp_attr_clone (pool, rhs->attr[i]); |
| 703 | PJ_ASSERT_RETURN(m->attr[i] != NULL, NULL); |
| 704 | } |
| 705 | |
| 706 | return m; |
| 707 | } |
| 708 | |
| 709 | PJ_DEF(pjmedia_sdp_attr*) pjmedia_sdp_media_find_attr( |
| 710 | const pjmedia_sdp_media *m, |
| 711 | const pj_str_t *name, const pj_str_t *fmt) |
| 712 | { |
| 713 | PJ_ASSERT_RETURN(m && name, NULL); |
| 714 | return pjmedia_sdp_attr_find(m->attr_count, m->attr, name, fmt); |
| 715 | } |
| 716 | |
| 717 | |
| 718 | |
| 719 | PJ_DEF(pjmedia_sdp_attr*) pjmedia_sdp_media_find_attr2( |
| 720 | const pjmedia_sdp_media *m, |
| 721 | const char *name, const pj_str_t *fmt) |
| 722 | { |
| 723 | PJ_ASSERT_RETURN(m && name, NULL); |
| 724 | return pjmedia_sdp_attr_find2(m->attr_count, m->attr, name, fmt); |
| 725 | } |
| 726 | |
| 727 | |
| 728 | PJ_DEF(pj_status_t) pjmedia_sdp_media_add_attr( pjmedia_sdp_media *m, |
| 729 | pjmedia_sdp_attr *attr) |
| 730 | { |
| 731 | return pjmedia_sdp_attr_add(&m->attr_count, m->attr, attr); |
| 732 | } |
| 733 | |
| 734 | PJ_DEF(pj_status_t) pjmedia_sdp_session_add_attr(pjmedia_sdp_session *s, |
| 735 | pjmedia_sdp_attr *attr) |
| 736 | { |
| 737 | return pjmedia_sdp_attr_add(&s->attr_count, s->attr, attr); |
| 738 | } |
| 739 | |
| 740 | PJ_DEF(unsigned) pjmedia_sdp_media_remove_all_attr(pjmedia_sdp_media *m, |
| 741 | const char *name) |
| 742 | { |
| 743 | return pjmedia_sdp_attr_remove_all(&m->attr_count, m->attr, name); |
| 744 | } |
| 745 | |
| 746 | PJ_DEF(pj_status_t) pjmedia_sdp_media_remove_attr(pjmedia_sdp_media *m, |
| 747 | pjmedia_sdp_attr *attr) |
| 748 | { |
| 749 | return pjmedia_sdp_attr_remove(&m->attr_count, m->attr, attr); |
| 750 | } |
| 751 | |
| 752 | static int print_session(const pjmedia_sdp_session *ses, |
| 753 | char *buf, pj_ssize_t len) |
| 754 | { |
| 755 | char *p = buf; |
| 756 | char *end = buf+len; |
| 757 | unsigned i; |
| 758 | int printed; |
| 759 | |
| 760 | /* Check length for v= and o= lines. */ |
| 761 | if (len < 5+ |
| 762 | 2+ses->origin.user.slen+18+ |
| 763 | ses->origin.net_type.slen+ses->origin.addr.slen + 2) |
| 764 | { |
| 765 | return -1; |
| 766 | } |
| 767 | |
| 768 | /* SDP version (v= line) */ |
| 769 | pj_memcpy(p, "v=0\r\n", 5); |
| 770 | p += 5; |
| 771 | |
| 772 | /* Owner (o=) line. */ |
| 773 | *p++ = 'o'; |
| 774 | *p++ = '='; |
| 775 | pj_memcpy(p, ses->origin.user.ptr, ses->origin.user.slen); |
| 776 | p += ses->origin.user.slen; |
| 777 | *p++ = ' '; |
| 778 | printed = pj_utoa(ses->origin.id, p); |
| 779 | p += printed; |
| 780 | *p++ = ' '; |
| 781 | printed = pj_utoa(ses->origin.version, p); |
| 782 | p += printed; |
| 783 | *p++ = ' '; |
| 784 | pj_memcpy(p, ses->origin.net_type.ptr, ses->origin.net_type.slen); |
| 785 | p += ses->origin.net_type.slen; |
| 786 | *p++ = ' '; |
| 787 | pj_memcpy(p, ses->origin.addr_type.ptr, ses->origin.addr_type.slen); |
| 788 | p += ses->origin.addr_type.slen; |
| 789 | *p++ = ' '; |
| 790 | pj_memcpy(p, ses->origin.addr.ptr, ses->origin.addr.slen); |
| 791 | p += ses->origin.addr.slen; |
| 792 | *p++ = '\r'; |
| 793 | *p++ = '\n'; |
| 794 | |
| 795 | /* Session name (s=) line. */ |
| 796 | if ((end-p) < 8+ses->name.slen) { |
| 797 | return -1; |
| 798 | } |
| 799 | *p++ = 's'; |
| 800 | *p++ = '='; |
| 801 | pj_memcpy(p, ses->name.ptr, ses->name.slen); |
| 802 | p += ses->name.slen; |
| 803 | *p++ = '\r'; |
| 804 | *p++ = '\n'; |
| 805 | |
| 806 | /* Connection line (c=) if exist. */ |
| 807 | if (ses->conn) { |
| 808 | printed = print_connection_info(ses->conn, p, (int)(end-p)); |
| 809 | if (printed < 1) { |
| 810 | return -1; |
| 811 | } |
| 812 | p += printed; |
| 813 | } |
| 814 | |
| 815 | /* print optional bandwidth info. */ |
| 816 | for (i=0; i<ses->bandw_count; ++i) { |
| 817 | printed = (int)print_bandw(ses->bandw[i], p, end-p); |
| 818 | if (printed < 1) { |
| 819 | return -1; |
| 820 | } |
| 821 | p += printed; |
| 822 | } |
| 823 | |
| 824 | /* Time */ |
| 825 | if ((end-p) < 24) { |
| 826 | return -1; |
| 827 | } |
| 828 | *p++ = 't'; |
| 829 | *p++ = '='; |
| 830 | printed = pj_utoa(ses->time.start, p); |
| 831 | p += printed; |
| 832 | *p++ = ' '; |
| 833 | printed = pj_utoa(ses->time.stop, p); |
| 834 | p += printed; |
| 835 | *p++ = '\r'; |
| 836 | *p++ = '\n'; |
| 837 | |
| 838 | /* Print all attribute (a=) lines. */ |
| 839 | for (i=0; i<ses->attr_count; ++i) { |
| 840 | printed = (int)print_attr(ses->attr[i], p, end-p); |
| 841 | if (printed < 0) { |
| 842 | return -1; |
| 843 | } |
| 844 | p += printed; |
| 845 | } |
| 846 | |
| 847 | /* Print media (m=) lines. */ |
| 848 | for (i=0; i<ses->media_count; ++i) { |
| 849 | printed = print_media_desc(ses->media[i], p, (int)(end-p)); |
| 850 | if (printed < 0) { |
| 851 | return -1; |
| 852 | } |
| 853 | p += printed; |
| 854 | } |
| 855 | |
| 856 | return (int)(p-buf); |
| 857 | } |
| 858 | |
| 859 | /****************************************************************************** |
| 860 | * PARSERS |
| 861 | */ |
| 862 | |
| 863 | static void parse_version(pj_scanner *scanner, parse_context *ctx) |
| 864 | { |
| 865 | ctx->last_error = PJMEDIA_SDP_EINVER; |
| 866 | |
| 867 | /* check equal sign */ |
| 868 | if (*(scanner->curptr+1) != '=') { |
| 869 | on_scanner_error(scanner); |
| 870 | return; |
| 871 | } |
| 872 | |
| 873 | /* check version is 0 */ |
| 874 | if (*(scanner->curptr+2) != '0') { |
| 875 | on_scanner_error(scanner); |
| 876 | return; |
| 877 | } |
| 878 | |
| 879 | /* We've got what we're looking for, skip anything until newline */ |
| 880 | pj_scan_skip_line(scanner); |
| 881 | } |
| 882 | |
| 883 | static void parse_origin(pj_scanner *scanner, pjmedia_sdp_session *ses, |
| 884 | parse_context *ctx) |
| 885 | { |
| 886 | pj_str_t str; |
| 887 | |
| 888 | ctx->last_error = PJMEDIA_SDP_EINORIGIN; |
| 889 | |
| 890 | /* check equal sign */ |
| 891 | if (*(scanner->curptr+1) != '=') { |
| 892 | on_scanner_error(scanner); |
| 893 | return; |
| 894 | } |
| 895 | |
| 896 | /* o= */ |
| 897 | pj_scan_advance_n(scanner, 2, SKIP_WS); |
| 898 | |
| 899 | /* username. */ |
| 900 | pj_scan_get_until_ch(scanner, ' ', &ses->origin.user); |
| 901 | pj_scan_get_char(scanner); |
| 902 | |
| 903 | /* id */ |
| 904 | pj_scan_get_until_ch(scanner, ' ', &str); |
| 905 | ses->origin.id = pj_strtoul(&str); |
| 906 | pj_scan_get_char(scanner); |
| 907 | |
| 908 | /* version */ |
| 909 | pj_scan_get_until_ch(scanner, ' ', &str); |
| 910 | ses->origin.version = pj_strtoul(&str); |
| 911 | pj_scan_get_char(scanner); |
| 912 | |
| 913 | /* network-type */ |
| 914 | pj_scan_get_until_ch(scanner, ' ', &ses->origin.net_type); |
| 915 | pj_scan_get_char(scanner); |
| 916 | |
| 917 | /* addr-type */ |
| 918 | pj_scan_get_until_ch(scanner, ' ', &ses->origin.addr_type); |
| 919 | pj_scan_get_char(scanner); |
| 920 | |
| 921 | /* address */ |
| 922 | pj_scan_get_until_chr(scanner, " \t\r\n", &ses->origin.addr); |
| 923 | |
| 924 | /* We've got what we're looking for, skip anything until newline */ |
| 925 | pj_scan_skip_line(scanner); |
| 926 | |
| 927 | } |
| 928 | |
| 929 | static void parse_time(pj_scanner *scanner, pjmedia_sdp_session *ses, |
| 930 | parse_context *ctx) |
| 931 | { |
| 932 | pj_str_t str; |
| 933 | |
| 934 | ctx->last_error = PJMEDIA_SDP_EINTIME; |
| 935 | |
| 936 | /* check equal sign */ |
| 937 | if (*(scanner->curptr+1) != '=') { |
| 938 | on_scanner_error(scanner); |
| 939 | return; |
| 940 | } |
| 941 | |
| 942 | /* t= */ |
| 943 | pj_scan_advance_n(scanner, 2, SKIP_WS); |
| 944 | |
| 945 | /* start time */ |
| 946 | pj_scan_get_until_ch(scanner, ' ', &str); |
| 947 | ses->time.start = pj_strtoul(&str); |
| 948 | |
| 949 | pj_scan_get_char(scanner); |
| 950 | |
| 951 | /* stop time */ |
| 952 | pj_scan_get_until_chr(scanner, " \t\r\n", &str); |
| 953 | ses->time.stop = pj_strtoul(&str); |
| 954 | |
| 955 | /* We've got what we're looking for, skip anything until newline */ |
| 956 | pj_scan_skip_line(scanner); |
| 957 | } |
| 958 | |
| 959 | static void parse_generic_line(pj_scanner *scanner, pj_str_t *str, |
| 960 | parse_context *ctx) |
| 961 | { |
| 962 | ctx->last_error = PJMEDIA_SDP_EINSDP; |
| 963 | |
| 964 | /* check equal sign */ |
| 965 | if (*(scanner->curptr+1) != '=') { |
| 966 | on_scanner_error(scanner); |
| 967 | return; |
| 968 | } |
| 969 | |
| 970 | /* x= */ |
| 971 | pj_scan_advance_n(scanner, 2, SKIP_WS); |
| 972 | |
| 973 | /* get anything until newline (including whitespaces). */ |
| 974 | pj_scan_get_until_chr(scanner, "\r\n", str); |
| 975 | |
| 976 | /* newline. */ |
| 977 | pj_scan_get_newline(scanner); |
| 978 | } |
| 979 | |
| 980 | static void parse_connection_info(pj_scanner *scanner, pjmedia_sdp_conn *conn, |
| 981 | parse_context *ctx) |
| 982 | { |
| 983 | ctx->last_error = PJMEDIA_SDP_EINCONN; |
| 984 | |
| 985 | /* c= */ |
| 986 | pj_scan_advance_n(scanner, 2, SKIP_WS); |
| 987 | |
| 988 | /* network-type */ |
| 989 | pj_scan_get_until_ch(scanner, ' ', &conn->net_type); |
| 990 | pj_scan_get_char(scanner); |
| 991 | |
| 992 | /* addr-type */ |
| 993 | pj_scan_get_until_ch(scanner, ' ', &conn->addr_type); |
| 994 | pj_scan_get_char(scanner); |
| 995 | |
| 996 | /* address. */ |
| 997 | pj_scan_get_until_chr(scanner, "/ \t\r\n", &conn->addr); |
| 998 | PJ_TODO(PARSE_SDP_CONN_ADDRESS_SUBFIELDS); |
| 999 | |
| 1000 | /* We've got what we're looking for, skip anything until newline */ |
| 1001 | pj_scan_skip_line(scanner); |
| 1002 | } |
| 1003 | |
| 1004 | static void parse_bandwidth_info(pj_scanner *scanner, pjmedia_sdp_bandw *bandw, |
| 1005 | parse_context *ctx) |
| 1006 | { |
| 1007 | pj_str_t str; |
| 1008 | |
| 1009 | ctx->last_error = PJMEDIA_SDP_EINBANDW; |
| 1010 | |
| 1011 | /* b= */ |
| 1012 | pj_scan_advance_n(scanner, 2, SKIP_WS); |
| 1013 | |
| 1014 | /* modifier */ |
| 1015 | pj_scan_get_until_ch(scanner, ':', &bandw->modifier); |
| 1016 | pj_scan_get_char(scanner); |
| 1017 | |
| 1018 | /* value */ |
| 1019 | pj_scan_get_until_chr(scanner, " \t\r\n", &str); |
| 1020 | bandw->value = pj_strtoul(&str); |
| 1021 | |
| 1022 | /* We've got what we're looking for, skip anything until newline */ |
| 1023 | pj_scan_skip_line(scanner); |
| 1024 | } |
| 1025 | |
| 1026 | static void parse_media(pj_scanner *scanner, pjmedia_sdp_media *med, |
| 1027 | parse_context *ctx) |
| 1028 | { |
| 1029 | pj_str_t str; |
| 1030 | |
| 1031 | ctx->last_error = PJMEDIA_SDP_EINMEDIA; |
| 1032 | |
| 1033 | /* check the equal sign */ |
| 1034 | if (*(scanner->curptr+1) != '=') { |
| 1035 | on_scanner_error(scanner); |
| 1036 | return; |
| 1037 | } |
| 1038 | |
| 1039 | /* m= */ |
| 1040 | pj_scan_advance_n(scanner, 2, SKIP_WS); |
| 1041 | |
| 1042 | /* type */ |
| 1043 | pj_scan_get_until_ch(scanner, ' ', &med->desc.media); |
| 1044 | pj_scan_get_char(scanner); |
| 1045 | |
| 1046 | /* port */ |
| 1047 | pj_scan_get(scanner, &cs_token, &str); |
| 1048 | med->desc.port = (unsigned short)pj_strtoul(&str); |
| 1049 | if (*scanner->curptr == '/') { |
| 1050 | /* port count */ |
| 1051 | pj_scan_get_char(scanner); |
| 1052 | pj_scan_get(scanner, &cs_token, &str); |
| 1053 | med->desc.port_count = pj_strtoul(&str); |
| 1054 | |
| 1055 | } else { |
| 1056 | med->desc.port_count = 0; |
| 1057 | } |
| 1058 | |
| 1059 | if (pj_scan_get_char(scanner) != ' ') { |
| 1060 | PJ_THROW(SYNTAX_ERROR); |
| 1061 | } |
| 1062 | |
| 1063 | /* transport */ |
| 1064 | pj_scan_get_until_chr(scanner, " \t\r\n", &med->desc.transport); |
| 1065 | |
| 1066 | /* format list */ |
| 1067 | med->desc.fmt_count = 0; |
| 1068 | while (*scanner->curptr == ' ') { |
| 1069 | pj_str_t fmt; |
| 1070 | |
| 1071 | pj_scan_get_char(scanner); |
| 1072 | |
| 1073 | /* Check again for the end of the line */ |
| 1074 | if ((*scanner->curptr == '\r') || (*scanner->curptr == '\n')) |
| 1075 | break; |
| 1076 | |
| 1077 | pj_scan_get(scanner, &cs_token, &fmt); |
| 1078 | if (med->desc.fmt_count < PJMEDIA_MAX_SDP_FMT) |
| 1079 | med->desc.fmt[med->desc.fmt_count++] = fmt; |
| 1080 | else |
| 1081 | PJ_PERROR(2,(THIS_FILE, PJ_ETOOMANY, |
| 1082 | "Error adding SDP media format %.*s, " |
| 1083 | "format is ignored", |
| 1084 | (int)fmt.slen, fmt.ptr)); |
| 1085 | } |
| 1086 | |
| 1087 | /* We've got what we're looking for, skip anything until newline */ |
| 1088 | pj_scan_skip_line(scanner); |
| 1089 | } |
| 1090 | |
| 1091 | static void on_scanner_error(pj_scanner *scanner) |
| 1092 | { |
| 1093 | PJ_UNUSED_ARG(scanner); |
| 1094 | |
| 1095 | PJ_THROW(SYNTAX_ERROR); |
| 1096 | } |
| 1097 | |
| 1098 | static pjmedia_sdp_attr *parse_attr( pj_pool_t *pool, pj_scanner *scanner, |
| 1099 | parse_context *ctx) |
| 1100 | { |
| 1101 | pjmedia_sdp_attr *attr; |
| 1102 | |
| 1103 | ctx->last_error = PJMEDIA_SDP_EINATTR; |
| 1104 | |
| 1105 | attr = PJ_POOL_ALLOC_T(pool, pjmedia_sdp_attr); |
| 1106 | |
| 1107 | /* check equal sign */ |
| 1108 | if (*(scanner->curptr+1) != '=') { |
| 1109 | on_scanner_error(scanner); |
| 1110 | return NULL; |
| 1111 | } |
| 1112 | |
| 1113 | /* skip a= */ |
| 1114 | pj_scan_advance_n(scanner, 2, SKIP_WS); |
| 1115 | |
| 1116 | /* get attr name. */ |
| 1117 | pj_scan_get(scanner, &cs_token, &attr->name); |
| 1118 | |
| 1119 | if (*scanner->curptr && *scanner->curptr != '\r' && |
| 1120 | *scanner->curptr != '\n') |
| 1121 | { |
| 1122 | /* skip ':' if present. */ |
| 1123 | if (*scanner->curptr == ':') |
| 1124 | pj_scan_get_char(scanner); |
| 1125 | |
| 1126 | /* get value */ |
| 1127 | if (*scanner->curptr != '\r' && *scanner->curptr != '\n') { |
| 1128 | pj_scan_get_until_chr(scanner, "\r\n", &attr->value); |
| 1129 | } else { |
| 1130 | attr->value.ptr = NULL; |
| 1131 | attr->value.slen = 0; |
| 1132 | } |
| 1133 | |
| 1134 | } else { |
| 1135 | attr->value.ptr = NULL; |
| 1136 | attr->value.slen = 0; |
| 1137 | } |
| 1138 | |
| 1139 | /* We've got what we're looking for, skip anything until newline */ |
| 1140 | pj_scan_skip_line(scanner); |
| 1141 | |
| 1142 | return attr; |
| 1143 | } |
| 1144 | |
| 1145 | |
| 1146 | /* |
| 1147 | * Apply direction attribute in session to all media. |
| 1148 | */ |
| 1149 | static void apply_media_direction(pjmedia_sdp_session *sdp) |
| 1150 | { |
| 1151 | pjmedia_sdp_attr *dir_attr = NULL; |
| 1152 | unsigned i; |
| 1153 | |
| 1154 | const pj_str_t inactive = { "inactive", 8 }; |
| 1155 | const pj_str_t sendonly = { "sendonly", 8 }; |
| 1156 | const pj_str_t recvonly = { "recvonly", 8 }; |
| 1157 | const pj_str_t sendrecv = { "sendrecv", 8 }; |
| 1158 | |
| 1159 | /* Find direction attribute in session, don't need to find default |
| 1160 | * direction "sendrecv". |
| 1161 | */ |
| 1162 | for (i = 0; i < sdp->attr_count && !dir_attr; ++i) { |
| 1163 | if (!pj_strcmp(&sdp->attr[i]->name, &sendonly) || |
| 1164 | !pj_strcmp(&sdp->attr[i]->name, &recvonly) || |
| 1165 | !pj_strcmp(&sdp->attr[i]->name, &inactive)) |
| 1166 | { |
| 1167 | dir_attr = sdp->attr[i]; |
| 1168 | } |
| 1169 | } |
| 1170 | |
| 1171 | /* Found the direction attribute */ |
| 1172 | if (dir_attr) { |
| 1173 | /* Remove the direction attribute in session */ |
| 1174 | pjmedia_sdp_attr_remove(&sdp->attr_count, sdp->attr, dir_attr); |
| 1175 | |
| 1176 | /* Apply the direction attribute to all media, but not overriding it |
| 1177 | * if media already has direction attribute. |
| 1178 | */ |
| 1179 | for (i = 0; i < sdp->media_count; ++i) { |
| 1180 | pjmedia_sdp_media *m; |
| 1181 | unsigned j; |
| 1182 | |
| 1183 | /* Find direction attribute in this media */ |
| 1184 | m = sdp->media[i]; |
| 1185 | for (j = 0; j < m->attr_count; ++j) { |
| 1186 | if (!pj_strcmp(&m->attr[j]->name, &sendrecv) || |
| 1187 | !pj_strcmp(&m->attr[j]->name, &sendonly) || |
| 1188 | !pj_strcmp(&m->attr[j]->name, &recvonly) || |
| 1189 | !pj_strcmp(&m->attr[j]->name, &inactive)) |
| 1190 | { |
| 1191 | break; |
| 1192 | } |
| 1193 | } |
| 1194 | |
| 1195 | /* Not found, apply direction attribute from session */ |
| 1196 | if (j == m->attr_count) |
| 1197 | pjmedia_sdp_media_add_attr(m, dir_attr); |
| 1198 | } |
| 1199 | } |
| 1200 | } |
| 1201 | |
| 1202 | |
| 1203 | /* |
| 1204 | * Parse SDP message. |
| 1205 | */ |
| 1206 | PJ_DEF(pj_status_t) pjmedia_sdp_parse( pj_pool_t *pool, |
| 1207 | char *buf, pj_size_t len, |
| 1208 | pjmedia_sdp_session **p_sdp) |
| 1209 | { |
| 1210 | pj_scanner scanner; |
| 1211 | pjmedia_sdp_session *session; |
| 1212 | pjmedia_sdp_media *media = NULL; |
| 1213 | pjmedia_sdp_attr *attr; |
| 1214 | pjmedia_sdp_conn *conn; |
| 1215 | pjmedia_sdp_bandw *bandw; |
| 1216 | pj_str_t dummy; |
| 1217 | int cur_name = 254; |
| 1218 | parse_context ctx; |
| 1219 | PJ_USE_EXCEPTION; |
| 1220 | |
| 1221 | ctx.last_error = PJ_SUCCESS; |
| 1222 | |
| 1223 | init_sdp_parser(); |
| 1224 | |
| 1225 | pj_scan_init(&scanner, buf, len, 0, &on_scanner_error); |
| 1226 | session = PJ_POOL_ZALLOC_T(pool, pjmedia_sdp_session); |
| 1227 | PJ_ASSERT_RETURN(session != NULL, PJ_ENOMEM); |
| 1228 | |
| 1229 | /* Ignore leading newlines */ |
| 1230 | while (*scanner.curptr=='\r' || *scanner.curptr=='\n') |
| 1231 | pj_scan_get_char(&scanner); |
| 1232 | |
| 1233 | PJ_TRY { |
| 1234 | while (!pj_scan_is_eof(&scanner)) { |
| 1235 | cur_name = *scanner.curptr; |
| 1236 | switch (cur_name) { |
| 1237 | case 'a': |
| 1238 | attr = parse_attr(pool, &scanner, &ctx); |
| 1239 | if (attr) { |
| 1240 | if (media) { |
| 1241 | pjmedia_sdp_media_add_attr(media, attr); |
| 1242 | } else { |
| 1243 | pjmedia_sdp_session_add_attr(session, attr); |
| 1244 | } |
| 1245 | } |
| 1246 | break; |
| 1247 | case 'o': |
| 1248 | parse_origin(&scanner, session, &ctx); |
| 1249 | break; |
| 1250 | case 's': |
| 1251 | parse_generic_line(&scanner, &session->name, &ctx); |
| 1252 | break; |
| 1253 | case 'c': |
| 1254 | conn = PJ_POOL_ZALLOC_T(pool, pjmedia_sdp_conn); |
| 1255 | parse_connection_info(&scanner, conn, &ctx); |
| 1256 | if (media) { |
| 1257 | media->conn = conn; |
| 1258 | } else { |
| 1259 | session->conn = conn; |
| 1260 | } |
| 1261 | break; |
| 1262 | case 't': |
| 1263 | parse_time(&scanner, session, &ctx); |
| 1264 | break; |
| 1265 | case 'm': |
| 1266 | media = PJ_POOL_ZALLOC_T(pool, pjmedia_sdp_media); |
| 1267 | parse_media(&scanner, media, &ctx); |
| 1268 | if (session->media_count < PJMEDIA_MAX_SDP_MEDIA) |
| 1269 | session->media[ session->media_count++ ] = media; |
| 1270 | else |
| 1271 | PJ_PERROR(2,(THIS_FILE, PJ_ETOOMANY, |
| 1272 | "Error adding media, media is ignored")); |
| 1273 | break; |
| 1274 | case 'v': |
| 1275 | parse_version(&scanner, &ctx); |
| 1276 | break; |
| 1277 | case 13: |
| 1278 | case 10: |
| 1279 | pj_scan_get_char(&scanner); |
| 1280 | /* Allow empty newlines at the end of the message */ |
| 1281 | while (!pj_scan_is_eof(&scanner)) { |
| 1282 | if (*scanner.curptr != 13 && *scanner.curptr != 10) { |
| 1283 | ctx.last_error = PJMEDIA_SDP_EINSDP; |
| 1284 | on_scanner_error(&scanner); |
| 1285 | } |
| 1286 | pj_scan_get_char(&scanner); |
| 1287 | } |
| 1288 | break; |
| 1289 | case 'b': |
| 1290 | bandw = PJ_POOL_ZALLOC_T(pool, pjmedia_sdp_bandw); |
| 1291 | parse_bandwidth_info(&scanner, bandw, &ctx); |
| 1292 | if (media) { |
| 1293 | media->bandw[media->bandw_count++] = bandw; |
| 1294 | } else { |
| 1295 | session->bandw[session->bandw_count++] = bandw; |
| 1296 | } |
| 1297 | break; |
| 1298 | default: |
| 1299 | if (cur_name >= 'a' && cur_name <= 'z') |
| 1300 | parse_generic_line(&scanner, &dummy, &ctx); |
| 1301 | else { |
| 1302 | ctx.last_error = PJMEDIA_SDP_EINSDP; |
| 1303 | on_scanner_error(&scanner); |
| 1304 | } |
| 1305 | break; |
| 1306 | } |
| 1307 | } |
| 1308 | |
| 1309 | ctx.last_error = PJ_SUCCESS; |
| 1310 | |
| 1311 | } |
| 1312 | PJ_CATCH_ANY { |
| 1313 | |
| 1314 | char errmsg[PJ_ERR_MSG_SIZE]; |
| 1315 | pj_strerror(ctx.last_error, errmsg, sizeof(errmsg)); |
| 1316 | |
| 1317 | PJ_LOG(4, (THIS_FILE, "Error parsing SDP in line %d col %d: %s", |
| 1318 | scanner.line, pj_scan_get_col(&scanner), |
| 1319 | errmsg)); |
| 1320 | |
| 1321 | session = NULL; |
| 1322 | |
| 1323 | pj_assert(ctx.last_error != PJ_SUCCESS); |
| 1324 | } |
| 1325 | PJ_END; |
| 1326 | |
| 1327 | pj_scan_fini(&scanner); |
| 1328 | |
| 1329 | if (session) |
| 1330 | apply_media_direction(session); |
| 1331 | |
| 1332 | *p_sdp = session; |
| 1333 | return ctx.last_error; |
| 1334 | } |
| 1335 | |
| 1336 | /* |
| 1337 | * Print SDP description. |
| 1338 | */ |
| 1339 | PJ_DEF(int) pjmedia_sdp_print( const pjmedia_sdp_session *desc, |
| 1340 | char *buf, pj_size_t size) |
| 1341 | { |
| 1342 | return print_session(desc, buf, size); |
| 1343 | } |
| 1344 | |
| 1345 | |
| 1346 | /* |
| 1347 | * Clone session |
| 1348 | */ |
| 1349 | PJ_DEF(pjmedia_sdp_session*) pjmedia_sdp_session_clone( pj_pool_t *pool, |
| 1350 | const pjmedia_sdp_session *rhs) |
| 1351 | { |
| 1352 | pjmedia_sdp_session *sess; |
| 1353 | unsigned i; |
| 1354 | |
| 1355 | PJ_ASSERT_RETURN(pool && rhs, NULL); |
| 1356 | |
| 1357 | sess = PJ_POOL_ZALLOC_T(pool, pjmedia_sdp_session); |
| 1358 | PJ_ASSERT_RETURN(sess != NULL, NULL); |
| 1359 | |
| 1360 | /* Clone origin line. */ |
| 1361 | pj_strdup(pool, &sess->origin.user, &rhs->origin.user); |
| 1362 | sess->origin.id = rhs->origin.id; |
| 1363 | sess->origin.version = rhs->origin.version; |
| 1364 | pj_strdup(pool, &sess->origin.net_type, &rhs->origin.net_type); |
| 1365 | pj_strdup(pool, &sess->origin.addr_type, &rhs->origin.addr_type); |
| 1366 | pj_strdup(pool, &sess->origin.addr, &rhs->origin.addr); |
| 1367 | |
| 1368 | /* Clone subject line. */ |
| 1369 | pj_strdup(pool, &sess->name, &rhs->name); |
| 1370 | |
| 1371 | /* Clone connection line */ |
| 1372 | if (rhs->conn) { |
| 1373 | sess->conn = pjmedia_sdp_conn_clone(pool, rhs->conn); |
| 1374 | PJ_ASSERT_RETURN(sess->conn != NULL, NULL); |
| 1375 | } |
| 1376 | |
| 1377 | /* Duplicate bandwidth info */ |
| 1378 | sess->bandw_count = rhs->bandw_count; |
| 1379 | for (i=0; i<rhs->bandw_count; ++i) { |
| 1380 | sess->bandw[i] = pjmedia_sdp_bandw_clone(pool, rhs->bandw[i]); |
| 1381 | } |
| 1382 | |
| 1383 | /* Clone time line. */ |
| 1384 | sess->time.start = rhs->time.start; |
| 1385 | sess->time.stop = rhs->time.stop; |
| 1386 | |
| 1387 | /* Duplicate session attributes. */ |
| 1388 | sess->attr_count = rhs->attr_count; |
| 1389 | for (i=0; i<rhs->attr_count; ++i) { |
| 1390 | sess->attr[i] = pjmedia_sdp_attr_clone(pool, rhs->attr[i]); |
| 1391 | } |
| 1392 | |
| 1393 | /* Duplicate media descriptors. */ |
| 1394 | sess->media_count = rhs->media_count; |
| 1395 | for (i=0; i<rhs->media_count; ++i) { |
| 1396 | sess->media[i] = pjmedia_sdp_media_clone(pool, rhs->media[i]); |
| 1397 | } |
| 1398 | |
| 1399 | return sess; |
| 1400 | } |
| 1401 | |
| 1402 | |
| 1403 | #define CHECK(exp,ret) do { \ |
| 1404 | /*pj_assert(exp);*/ \ |
| 1405 | if (!(exp)) \ |
| 1406 | return ret; \ |
| 1407 | } while (0) |
| 1408 | |
| 1409 | /* Validate SDP connetion info. */ |
| 1410 | static pj_status_t validate_sdp_conn(const pjmedia_sdp_conn *c) |
| 1411 | { |
| 1412 | CHECK( c, PJ_EINVAL); |
| 1413 | CHECK( pj_strcmp2(&c->net_type, "IN")==0, PJMEDIA_SDP_EINCONN); |
| 1414 | CHECK( pj_strcmp2(&c->addr_type, "IP4")==0 || |
| 1415 | pj_strcmp2(&c->addr_type, "IP6")==0, |
| 1416 | PJMEDIA_SDP_EINCONN); |
| 1417 | CHECK( c->addr.slen != 0, PJMEDIA_SDP_EINCONN); |
| 1418 | |
| 1419 | return PJ_SUCCESS; |
| 1420 | } |
| 1421 | |
| 1422 | |
| 1423 | /* Validate SDP session descriptor. */ |
| 1424 | PJ_DEF(pj_status_t) pjmedia_sdp_validate(const pjmedia_sdp_session *sdp) |
| 1425 | { |
| 1426 | return pjmedia_sdp_validate2(sdp, PJ_TRUE); |
| 1427 | } |
| 1428 | |
| 1429 | |
| 1430 | /* Validate SDP session descriptor. */ |
| 1431 | PJ_DEF(pj_status_t) pjmedia_sdp_validate2(const pjmedia_sdp_session *sdp, |
| 1432 | pj_bool_t strict) |
| 1433 | { |
| 1434 | unsigned i; |
| 1435 | const pj_str_t STR_RTPMAP = { "rtpmap", 6 }; |
| 1436 | |
| 1437 | CHECK( sdp != NULL, PJ_EINVAL); |
| 1438 | |
| 1439 | /* Validate origin line. */ |
| 1440 | CHECK( sdp->origin.user.slen != 0, PJMEDIA_SDP_EINORIGIN); |
| 1441 | CHECK( pj_strcmp2(&sdp->origin.net_type, "IN")==0, |
| 1442 | PJMEDIA_SDP_EINORIGIN); |
| 1443 | CHECK( pj_strcmp2(&sdp->origin.addr_type, "IP4")==0 || |
| 1444 | pj_strcmp2(&sdp->origin.addr_type, "IP6")==0, |
| 1445 | PJMEDIA_SDP_EINORIGIN); |
| 1446 | CHECK( sdp->origin.addr.slen != 0, PJMEDIA_SDP_EINORIGIN); |
| 1447 | |
| 1448 | /* Validate subject line. */ |
| 1449 | CHECK( sdp->name.slen != 0, PJMEDIA_SDP_EINNAME); |
| 1450 | |
| 1451 | /* Ignore start and stop time. */ |
| 1452 | |
| 1453 | /* If session level connection info is present, validate it. */ |
| 1454 | if (sdp->conn) { |
| 1455 | pj_status_t status = validate_sdp_conn(sdp->conn); |
| 1456 | if (status != PJ_SUCCESS) |
| 1457 | return status; |
| 1458 | } |
| 1459 | |
| 1460 | /* Validate each media. */ |
| 1461 | for (i=0; i<sdp->media_count; ++i) { |
| 1462 | const pjmedia_sdp_media *m = sdp->media[i]; |
| 1463 | unsigned j; |
| 1464 | |
| 1465 | /* Validate the m= line. */ |
| 1466 | CHECK( m->desc.media.slen != 0, PJMEDIA_SDP_EINMEDIA); |
| 1467 | CHECK( m->desc.transport.slen != 0, PJMEDIA_SDP_EINMEDIA); |
| 1468 | CHECK( m->desc.fmt_count != 0 || m->desc.port==0, PJMEDIA_SDP_ENOFMT); |
| 1469 | |
| 1470 | /* If media level connection info is present, validate it. */ |
| 1471 | if (m->conn) { |
| 1472 | pj_status_t status = validate_sdp_conn(m->conn); |
| 1473 | if (status != PJ_SUCCESS) |
| 1474 | return status; |
| 1475 | } |
| 1476 | |
| 1477 | /* If media doesn't have connection info, then connection info |
| 1478 | * must be present in the session. |
| 1479 | */ |
| 1480 | if (m->conn == NULL) { |
| 1481 | if (sdp->conn == NULL) |
| 1482 | if (strict || m->desc.port != 0) |
| 1483 | return PJMEDIA_SDP_EMISSINGCONN; |
| 1484 | } |
| 1485 | |
| 1486 | /* Verify payload type. */ |
| 1487 | for (j=0; j<m->desc.fmt_count; ++j) { |
| 1488 | |
| 1489 | /* Arrgh noo!! Payload type can be non-numeric!! |
| 1490 | * RTC based programs sends "null" for instant messaging! |
| 1491 | */ |
| 1492 | if (pj_isdigit(*m->desc.fmt[j].ptr)) { |
| 1493 | unsigned pt = pj_strtoul(&m->desc.fmt[j]); |
| 1494 | |
| 1495 | /* Payload type is between 0 and 127. |
| 1496 | */ |
| 1497 | CHECK( pt <= 127, PJMEDIA_SDP_EINPT); |
| 1498 | |
| 1499 | /* If port is not zero, then for each dynamic payload type, an |
| 1500 | * rtpmap attribute must be specified. |
| 1501 | */ |
| 1502 | if (m->desc.port != 0 && pt >= 96) { |
| 1503 | const pjmedia_sdp_attr *a; |
| 1504 | |
| 1505 | a = pjmedia_sdp_media_find_attr(m, &STR_RTPMAP, |
| 1506 | &m->desc.fmt[j]); |
| 1507 | CHECK( a != NULL, PJMEDIA_SDP_EMISSINGRTPMAP); |
| 1508 | } |
| 1509 | } |
| 1510 | } |
| 1511 | } |
| 1512 | |
| 1513 | /* Looks good. */ |
| 1514 | return PJ_SUCCESS; |
| 1515 | } |
| 1516 | |
| 1517 | |
| 1518 | PJ_DEF(pj_status_t) pjmedia_sdp_transport_cmp( const pj_str_t *t1, |
| 1519 | const pj_str_t *t2) |
| 1520 | { |
| 1521 | static const pj_str_t ID_RTP_AVP = { "RTP/AVP", 7 }; |
| 1522 | static const pj_str_t ID_RTP_SAVP = { "RTP/SAVP", 8 }; |
| 1523 | |
| 1524 | /* Exactly equal? */ |
| 1525 | if (pj_stricmp(t1, t2) == 0) |
| 1526 | return PJ_SUCCESS; |
| 1527 | |
| 1528 | /* Compatible? */ |
| 1529 | if ((!pj_stricmp(t1, &ID_RTP_AVP) || !pj_stricmp(t1, &ID_RTP_SAVP)) && |
| 1530 | (!pj_stricmp(t2, &ID_RTP_AVP) || !pj_stricmp(t2, &ID_RTP_SAVP))) |
| 1531 | return PJ_SUCCESS; |
| 1532 | |
| 1533 | return PJMEDIA_SDP_ETPORTNOTEQUAL; |
| 1534 | } |
| 1535 | |
| 1536 | |
| 1537 | PJ_DEF(pj_status_t) pjmedia_sdp_media_deactivate(pj_pool_t *pool, |
| 1538 | pjmedia_sdp_media *m) |
| 1539 | { |
| 1540 | PJ_ASSERT_RETURN(m, PJ_EINVAL); |
| 1541 | PJ_UNUSED_ARG(pool); |
| 1542 | |
| 1543 | /* Set port to zero */ |
| 1544 | m->desc.port = 0; |
| 1545 | |
| 1546 | /* And remove attributes */ |
| 1547 | m->attr_count = 0; |
| 1548 | |
| 1549 | return PJ_SUCCESS; |
| 1550 | } |
| 1551 | |
| 1552 | |
| 1553 | PJ_DEF(pjmedia_sdp_media*) pjmedia_sdp_media_clone_deactivate( |
| 1554 | pj_pool_t *pool, |
| 1555 | const pjmedia_sdp_media *rhs) |
| 1556 | { |
| 1557 | unsigned int i; |
| 1558 | pjmedia_sdp_media *m; |
| 1559 | |
| 1560 | PJ_ASSERT_RETURN(pool && rhs, NULL); |
| 1561 | |
| 1562 | m = PJ_POOL_ZALLOC_T(pool, pjmedia_sdp_media); |
| 1563 | pj_memcpy(m, rhs, sizeof(*m)); |
| 1564 | |
| 1565 | /* Clone the media line only */ |
| 1566 | pj_strdup (pool, &m->desc.media, &rhs->desc.media); |
| 1567 | pj_strdup (pool, &m->desc.transport, &rhs->desc.transport); |
| 1568 | for (i=0; i<rhs->desc.fmt_count; ++i) |
| 1569 | pj_strdup(pool, &m->desc.fmt[i], &rhs->desc.fmt[i]); |
| 1570 | |
| 1571 | if (rhs->conn) { |
| 1572 | m->conn = pjmedia_sdp_conn_clone (pool, rhs->conn); |
| 1573 | PJ_ASSERT_RETURN(m->conn != NULL, NULL); |
| 1574 | } |
| 1575 | |
| 1576 | m->bandw_count = rhs->bandw_count; |
| 1577 | for (i=0; i < rhs->bandw_count; ++i) { |
| 1578 | m->bandw[i] = pjmedia_sdp_bandw_clone (pool, rhs->bandw[i]); |
| 1579 | PJ_ASSERT_RETURN(m->bandw[i] != NULL, NULL); |
| 1580 | } |
| 1581 | |
| 1582 | /* And deactivate it */ |
| 1583 | pjmedia_sdp_media_deactivate(pool, m); |
| 1584 | |
| 1585 | return m; |
| 1586 | } |