| /* $Id$ */ |
| /* |
| * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) |
| * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| #include <pjmedia/sdp.h> |
| #include <pjmedia/errno.h> |
| #include <pjlib-util/scanner.h> |
| #include <pj/array.h> |
| #include <pj/except.h> |
| #include <pj/log.h> |
| #include <pj/os.h> |
| #include <pj/string.h> |
| #include <pj/pool.h> |
| #include <pj/assert.h> |
| #include <pj/ctype.h> |
| |
| |
| enum { |
| SKIP_WS = 0, |
| SYNTAX_ERROR = 1, |
| }; |
| // New token definition from RFC 4566 (SDP) |
| #define TOKEN "!#$%&'*+-.^_`{|}~" |
| //#define TOKEN "-.!%*_=`'~" |
| //#define TOKEN "'`-./:?\"#$&*;=@[]^_`{|}+~!" |
| #define NTP_OFFSET ((pj_uint32_t)2208988800) |
| #define THIS_FILE "sdp.c" |
| |
| typedef struct parse_context |
| { |
| pj_status_t last_error; |
| } parse_context; |
| |
| |
| /* |
| * Prototypes for line parser. |
| */ |
| static void parse_version(pj_scanner *scanner, parse_context *ctx); |
| static void parse_origin(pj_scanner *scanner, pjmedia_sdp_session *ses, |
| parse_context *ctx); |
| static void parse_time(pj_scanner *scanner, pjmedia_sdp_session *ses, |
| parse_context *ctx); |
| static void parse_generic_line(pj_scanner *scanner, pj_str_t *str, |
| parse_context *ctx); |
| static void parse_connection_info(pj_scanner *scanner, pjmedia_sdp_conn *conn, |
| parse_context *ctx); |
| static void parse_bandwidth_info(pj_scanner *scanner, pjmedia_sdp_bandw *bandw, |
| parse_context *ctx); |
| static pjmedia_sdp_attr *parse_attr(pj_pool_t *pool, pj_scanner *scanner, |
| parse_context *ctx); |
| static void parse_media(pj_scanner *scanner, pjmedia_sdp_media *med, |
| parse_context *ctx); |
| static void on_scanner_error(pj_scanner *scanner); |
| |
| /* |
| * Scanner character specification. |
| */ |
| static int is_initialized; |
| static pj_cis_buf_t cis_buf; |
| static pj_cis_t cs_digit, cs_token; |
| |
| static void init_sdp_parser(void) |
| { |
| if (is_initialized != 0) |
| return; |
| |
| pj_enter_critical_section(); |
| |
| if (is_initialized != 0) { |
| pj_leave_critical_section(); |
| return; |
| } |
| |
| pj_cis_buf_init(&cis_buf); |
| |
| pj_cis_init(&cis_buf, &cs_token); |
| pj_cis_add_alpha(&cs_token); |
| pj_cis_add_num(&cs_token); |
| pj_cis_add_str(&cs_token, TOKEN); |
| |
| pj_cis_init(&cis_buf, &cs_digit); |
| pj_cis_add_num(&cs_digit); |
| |
| is_initialized = 1; |
| pj_leave_critical_section(); |
| } |
| |
| PJ_DEF(pjmedia_sdp_attr*) pjmedia_sdp_attr_create( pj_pool_t *pool, |
| const char *name, |
| const pj_str_t *value) |
| { |
| pjmedia_sdp_attr *attr; |
| |
| PJ_ASSERT_RETURN(pool && name, NULL); |
| |
| attr = PJ_POOL_ALLOC_T(pool, pjmedia_sdp_attr); |
| pj_strdup2(pool, &attr->name, name); |
| |
| if (value) |
| pj_strdup_with_null(pool, &attr->value, value); |
| else { |
| attr->value.ptr = NULL; |
| attr->value.slen = 0; |
| } |
| |
| return attr; |
| } |
| |
| PJ_DEF(pjmedia_sdp_attr*) pjmedia_sdp_attr_clone(pj_pool_t *pool, |
| const pjmedia_sdp_attr *rhs) |
| { |
| pjmedia_sdp_attr *attr; |
| |
| PJ_ASSERT_RETURN(pool && rhs, NULL); |
| |
| attr = PJ_POOL_ALLOC_T(pool, pjmedia_sdp_attr); |
| |
| pj_strdup(pool, &attr->name, &rhs->name); |
| pj_strdup_with_null(pool, &attr->value, &rhs->value); |
| |
| return attr; |
| } |
| |
| PJ_DEF(pjmedia_sdp_attr*) pjmedia_sdp_attr_find (unsigned count, |
| pjmedia_sdp_attr *const attr_array[], |
| const pj_str_t *name, |
| const pj_str_t *c_fmt) |
| { |
| unsigned i; |
| unsigned c_pt = 0xFFFF; |
| |
| if (c_fmt) |
| c_pt = pj_strtoul(c_fmt); |
| |
| for (i=0; i<count; ++i) { |
| if (pj_strcmp(&attr_array[i]->name, name) == 0) { |
| const pjmedia_sdp_attr *a = attr_array[i]; |
| if (c_fmt) { |
| unsigned pt = (unsigned) pj_strtoul2(&a->value, NULL, 10); |
| if (pt == c_pt) { |
| return (pjmedia_sdp_attr*)a; |
| } |
| } else |
| return (pjmedia_sdp_attr*)a; |
| } |
| } |
| return NULL; |
| } |
| |
| PJ_DEF(pjmedia_sdp_attr*) pjmedia_sdp_attr_find2(unsigned count, |
| pjmedia_sdp_attr *const attr_array[], |
| const char *c_name, |
| const pj_str_t *c_fmt) |
| { |
| pj_str_t name; |
| |
| name.ptr = (char*)c_name; |
| name.slen = pj_ansi_strlen(c_name); |
| |
| return pjmedia_sdp_attr_find(count, attr_array, &name, c_fmt); |
| } |
| |
| |
| |
| PJ_DEF(pj_status_t) pjmedia_sdp_attr_add(unsigned *count, |
| pjmedia_sdp_attr *attr_array[], |
| pjmedia_sdp_attr *attr) |
| { |
| PJ_ASSERT_RETURN(count && attr_array && attr, PJ_EINVAL); |
| PJ_ASSERT_RETURN(*count < PJMEDIA_MAX_SDP_ATTR, PJ_ETOOMANY); |
| |
| attr_array[*count] = attr; |
| (*count)++; |
| |
| return PJ_SUCCESS; |
| } |
| |
| |
| PJ_DEF(unsigned) pjmedia_sdp_attr_remove_all(unsigned *count, |
| pjmedia_sdp_attr *attr_array[], |
| const char *name) |
| { |
| unsigned i, removed = 0; |
| pj_str_t attr_name; |
| |
| PJ_ASSERT_RETURN(count && attr_array && name, PJ_EINVAL); |
| |
| attr_name.ptr = (char*)name; |
| attr_name.slen = pj_ansi_strlen(name); |
| |
| for (i=0; i<*count; ) { |
| if (pj_strcmp(&attr_array[i]->name, &attr_name)==0) { |
| pj_array_erase(attr_array, sizeof(pjmedia_sdp_attr*), |
| *count, i); |
| --(*count); |
| ++removed; |
| } else { |
| ++i; |
| } |
| } |
| |
| return removed; |
| } |
| |
| |
| PJ_DEF(pj_status_t) pjmedia_sdp_attr_remove( unsigned *count, |
| pjmedia_sdp_attr *attr_array[], |
| pjmedia_sdp_attr *attr ) |
| { |
| unsigned i, removed=0; |
| |
| PJ_ASSERT_RETURN(count && attr_array && attr, PJ_EINVAL); |
| |
| for (i=0; i<*count; ) { |
| if (attr_array[i] == attr) { |
| pj_array_erase(attr_array, sizeof(pjmedia_sdp_attr*), |
| *count, i); |
| --(*count); |
| ++removed; |
| } else { |
| ++i; |
| } |
| } |
| |
| return removed ? PJ_SUCCESS : PJ_ENOTFOUND; |
| } |
| |
| |
| PJ_DEF(pj_status_t) pjmedia_sdp_attr_get_rtpmap( const pjmedia_sdp_attr *attr, |
| pjmedia_sdp_rtpmap *rtpmap) |
| { |
| pj_scanner scanner; |
| pj_str_t token; |
| pj_status_t status = -1; |
| char term = 0; |
| PJ_USE_EXCEPTION; |
| |
| PJ_ASSERT_RETURN(pj_strcmp2(&attr->name, "rtpmap")==0, PJ_EINVALIDOP); |
| |
| PJ_ASSERT_RETURN(attr->value.slen != 0, PJMEDIA_SDP_EINATTR); |
| |
| init_sdp_parser(); |
| |
| /* Check if input is null terminated, and null terminate if |
| * necessary. Unfortunately this may crash the application if |
| * attribute was allocated from a read-only memory location. |
| * But this shouldn't happen as attribute's value normally is |
| * null terminated. |
| */ |
| if (attr->value.ptr[attr->value.slen] != 0 && |
| attr->value.ptr[attr->value.slen] != '\r' && |
| attr->value.ptr[attr->value.slen] != '\n') |
| { |
| pj_assert(!"Shouldn't happen"); |
| term = attr->value.ptr[attr->value.slen]; |
| attr->value.ptr[attr->value.slen] = '\0'; |
| } |
| |
| pj_scan_init(&scanner, (char*)attr->value.ptr, attr->value.slen, |
| PJ_SCAN_AUTOSKIP_WS, &on_scanner_error); |
| |
| /* rtpmap sample: |
| * a=rtpmap:98 L16/16000/2. |
| */ |
| |
| /* Init */ |
| rtpmap->pt.slen = rtpmap->param.slen = rtpmap->enc_name.slen = 0; |
| rtpmap->clock_rate = 0; |
| |
| /* Parse */ |
| PJ_TRY { |
| |
| /* Get payload type. */ |
| pj_scan_get(&scanner, &cs_token, &rtpmap->pt); |
| |
| |
| /* Get encoding name. */ |
| pj_scan_get(&scanner, &cs_token, &rtpmap->enc_name); |
| |
| /* Expecting '/' after encoding name. */ |
| if (pj_scan_get_char(&scanner) != '/') { |
| status = PJMEDIA_SDP_EINRTPMAP; |
| goto on_return; |
| } |
| |
| |
| /* Get the clock rate. */ |
| pj_scan_get(&scanner, &cs_digit, &token); |
| rtpmap->clock_rate = pj_strtoul(&token); |
| |
| /* Expecting either '/' or EOF */ |
| if (*scanner.curptr == '/') { |
| pj_scan_get_char(&scanner); |
| rtpmap->param.ptr = scanner.curptr; |
| rtpmap->param.slen = scanner.end - scanner.curptr; |
| } else { |
| rtpmap->param.slen = 0; |
| } |
| |
| status = PJ_SUCCESS; |
| } |
| PJ_CATCH_ANY { |
| status = PJMEDIA_SDP_EINRTPMAP; |
| } |
| PJ_END; |
| |
| |
| on_return: |
| pj_scan_fini(&scanner); |
| if (term) { |
| attr->value.ptr[attr->value.slen] = term; |
| } |
| return status; |
| } |
| |
| PJ_DEF(pj_status_t) pjmedia_sdp_attr_get_fmtp( const pjmedia_sdp_attr *attr, |
| pjmedia_sdp_fmtp *fmtp) |
| { |
| const char *p = attr->value.ptr; |
| const char *end = attr->value.ptr + attr->value.slen; |
| pj_str_t token; |
| |
| PJ_ASSERT_RETURN(pj_strcmp2(&attr->name, "fmtp")==0, PJ_EINVALIDOP); |
| |
| /* fmtp BNF: |
| * a=fmtp:<format> <format specific parameter> |
| */ |
| |
| /* Get format. */ |
| token.ptr = (char*)p; |
| while (pj_isdigit(*p) && p!=end) |
| ++p; |
| token.slen = p - token.ptr; |
| if (token.slen == 0) |
| return PJMEDIA_SDP_EINFMTP; |
| |
| fmtp->fmt = token; |
| |
| /* Expecting space after format. */ |
| if (*p != ' ') return PJMEDIA_SDP_EINFMTP; |
| |
| /* Get space. */ |
| ++p; |
| |
| /* Set the remaining string as fmtp format parameter. */ |
| fmtp->fmt_param.ptr = (char*)p; |
| fmtp->fmt_param.slen = end - p; |
| |
| return PJ_SUCCESS; |
| } |
| |
| |
| PJ_DEF(pj_status_t) pjmedia_sdp_attr_get_rtcp(const pjmedia_sdp_attr *attr, |
| pjmedia_sdp_rtcp_attr *rtcp) |
| { |
| pj_scanner scanner; |
| pj_str_t token; |
| pj_status_t status = -1; |
| PJ_USE_EXCEPTION; |
| |
| PJ_ASSERT_RETURN(pj_strcmp2(&attr->name, "rtcp")==0, PJ_EINVALIDOP); |
| |
| init_sdp_parser(); |
| |
| /* fmtp BNF: |
| * a=rtcp:<port> [nettype addrtype address] |
| */ |
| |
| pj_scan_init(&scanner, (char*)attr->value.ptr, attr->value.slen, |
| PJ_SCAN_AUTOSKIP_WS, &on_scanner_error); |
| |
| /* Init */ |
| rtcp->net_type.slen = rtcp->addr_type.slen = rtcp->addr.slen = 0; |
| |
| /* Parse */ |
| PJ_TRY { |
| |
| /* Get the port */ |
| pj_scan_get(&scanner, &cs_token, &token); |
| rtcp->port = pj_strtoul(&token); |
| |
| /* Have address? */ |
| if (!pj_scan_is_eof(&scanner)) { |
| |
| /* Get network type */ |
| pj_scan_get(&scanner, &cs_token, &rtcp->net_type); |
| |
| /* Get address type */ |
| pj_scan_get(&scanner, &cs_token, &rtcp->addr_type); |
| |
| /* Get the address */ |
| pj_scan_get(&scanner, &cs_token, &rtcp->addr); |
| |
| } |
| |
| status = PJ_SUCCESS; |
| |
| } |
| PJ_CATCH_ANY { |
| status = PJMEDIA_SDP_EINRTCP; |
| } |
| PJ_END; |
| |
| pj_scan_fini(&scanner); |
| return status; |
| } |
| |
| |
| PJ_DEF(pjmedia_sdp_attr*) pjmedia_sdp_attr_create_rtcp(pj_pool_t *pool, |
| const pj_sockaddr *a) |
| { |
| enum { |
| ATTR_LEN = PJ_INET6_ADDRSTRLEN+16 |
| }; |
| pjmedia_sdp_attr *attr; |
| |
| attr = PJ_POOL_ALLOC_T(pool, pjmedia_sdp_attr); |
| attr->name = pj_str("rtcp"); |
| attr->value.ptr = (char*) pj_pool_alloc(pool, ATTR_LEN); |
| if (a->addr.sa_family == pj_AF_INET()) { |
| attr->value.slen = |
| pj_ansi_snprintf(attr->value.ptr, ATTR_LEN, |
| "%u IN IP4 %s", |
| pj_ntohs(a->ipv4.sin_port), |
| pj_inet_ntoa(a->ipv4.sin_addr)); |
| } else if (a->addr.sa_family == pj_AF_INET6()) { |
| char tmp_addr[PJ_INET6_ADDRSTRLEN]; |
| attr->value.slen = |
| pj_ansi_snprintf(attr->value.ptr, ATTR_LEN, |
| "%u IN IP6 %s", |
| pj_sockaddr_get_port(a), |
| pj_sockaddr_print(a, tmp_addr, |
| sizeof(tmp_addr), 0)); |
| |
| } else { |
| pj_assert(!"Unsupported address family"); |
| return NULL; |
| } |
| |
| return attr; |
| } |
| |
| |
| PJ_DEF(pj_status_t) pjmedia_sdp_attr_to_rtpmap(pj_pool_t *pool, |
| const pjmedia_sdp_attr *attr, |
| pjmedia_sdp_rtpmap **p_rtpmap) |
| { |
| PJ_ASSERT_RETURN(pool && attr && p_rtpmap, PJ_EINVAL); |
| |
| *p_rtpmap = PJ_POOL_ALLOC_T(pool, pjmedia_sdp_rtpmap); |
| PJ_ASSERT_RETURN(*p_rtpmap, PJ_ENOMEM); |
| |
| return pjmedia_sdp_attr_get_rtpmap(attr, *p_rtpmap); |
| } |
| |
| |
| PJ_DEF(pj_status_t) pjmedia_sdp_rtpmap_to_attr(pj_pool_t *pool, |
| const pjmedia_sdp_rtpmap *rtpmap, |
| pjmedia_sdp_attr **p_attr) |
| { |
| pjmedia_sdp_attr *attr; |
| char tempbuf[128]; |
| int len; |
| |
| /* Check arguments. */ |
| PJ_ASSERT_RETURN(pool && rtpmap && p_attr, PJ_EINVAL); |
| |
| /* Check that mandatory attributes are specified. */ |
| PJ_ASSERT_RETURN(rtpmap->enc_name.slen && rtpmap->clock_rate, |
| PJMEDIA_SDP_EINRTPMAP); |
| |
| |
| attr = PJ_POOL_ALLOC_T(pool, pjmedia_sdp_attr); |
| PJ_ASSERT_RETURN(attr != NULL, PJ_ENOMEM); |
| |
| attr->name.ptr = "rtpmap"; |
| attr->name.slen = 6; |
| |
| /* Format: ":pt enc_name/clock_rate[/param]" */ |
| len = pj_ansi_snprintf(tempbuf, sizeof(tempbuf), |
| "%.*s %.*s/%u%s%.*s", |
| (int)rtpmap->pt.slen, |
| rtpmap->pt.ptr, |
| (int)rtpmap->enc_name.slen, |
| rtpmap->enc_name.ptr, |
| rtpmap->clock_rate, |
| (rtpmap->param.slen ? "/" : ""), |
| (int)rtpmap->param.slen, |
| rtpmap->param.ptr); |
| |
| if (len < 1 || len >= (int)sizeof(tempbuf)) |
| return PJMEDIA_SDP_ERTPMAPTOOLONG; |
| |
| attr->value.slen = len; |
| attr->value.ptr = (char*) pj_pool_alloc(pool, attr->value.slen+1); |
| pj_memcpy(attr->value.ptr, tempbuf, attr->value.slen+1); |
| |
| *p_attr = attr; |
| return PJ_SUCCESS; |
| } |
| |
| |
| static int print_connection_info( pjmedia_sdp_conn *c, char *buf, int len) |
| { |
| int printed; |
| |
| printed = pj_ansi_snprintf(buf, len, "c=%.*s %.*s %.*s\r\n", |
| (int)c->net_type.slen, |
| c->net_type.ptr, |
| (int)c->addr_type.slen, |
| c->addr_type.ptr, |
| (int)c->addr.slen, |
| c->addr.ptr); |
| if (printed < 1 || printed >= len) |
| return -1; |
| |
| return printed; |
| } |
| |
| |
| PJ_DEF(pjmedia_sdp_conn*) pjmedia_sdp_conn_clone (pj_pool_t *pool, |
| const pjmedia_sdp_conn *rhs) |
| { |
| pjmedia_sdp_conn *c = PJ_POOL_ALLOC_T(pool, pjmedia_sdp_conn); |
| if (!c) return NULL; |
| |
| if (!pj_strdup (pool, &c->net_type, &rhs->net_type)) return NULL; |
| if (!pj_strdup (pool, &c->addr_type, &rhs->addr_type)) return NULL; |
| if (!pj_strdup (pool, &c->addr, &rhs->addr)) return NULL; |
| |
| return c; |
| } |
| |
| PJ_DEF(pjmedia_sdp_bandw*) |
| pjmedia_sdp_bandw_clone (pj_pool_t *pool, |
| const pjmedia_sdp_bandw *rhs) |
| { |
| pjmedia_sdp_bandw *b = PJ_POOL_ALLOC_T(pool, pjmedia_sdp_bandw); |
| if (!b) return NULL; |
| |
| if (!pj_strdup (pool, &b->modifier, &rhs->modifier)) return NULL; |
| b->value = rhs->value; |
| |
| return b; |
| } |
| |
| static pj_ssize_t print_bandw(const pjmedia_sdp_bandw *bandw, |
| char *buf, pj_size_t len) |
| { |
| char *p = buf; |
| |
| if ((int)len < bandw->modifier.slen + 10 + 5) |
| return -1; |
| |
| *p++ = 'b'; |
| *p++ = '='; |
| pj_memcpy(p, bandw->modifier.ptr, bandw->modifier.slen); |
| p += bandw->modifier.slen; |
| *p++ = ':'; |
| p += pj_utoa(bandw->value, p); |
| |
| *p++ = '\r'; |
| *p++ = '\n'; |
| return p-buf; |
| } |
| |
| static pj_ssize_t print_attr(const pjmedia_sdp_attr *attr, |
| char *buf, pj_size_t len) |
| { |
| char *p = buf; |
| |
| if ((int)len < attr->name.slen + attr->value.slen + 10) |
| return -1; |
| |
| *p++ = 'a'; |
| *p++ = '='; |
| pj_memcpy(p, attr->name.ptr, attr->name.slen); |
| p += attr->name.slen; |
| |
| |
| if (attr->value.slen) { |
| *p++ = ':'; |
| pj_memcpy(p, attr->value.ptr, attr->value.slen); |
| p += attr->value.slen; |
| } |
| |
| *p++ = '\r'; |
| *p++ = '\n'; |
| return p-buf; |
| } |
| |
| static int print_media_desc( pjmedia_sdp_media *m, char *buf, int len) |
| { |
| char *p = buf; |
| char *end = buf+len; |
| unsigned i; |
| int printed; |
| |
| /* check length for the "m=" line. */ |
| if (len < m->desc.media.slen+m->desc.transport.slen+12+24) { |
| return -1; |
| } |
| *p++ = 'm'; /* m= */ |
| *p++ = '='; |
| pj_memcpy(p, m->desc.media.ptr, m->desc.media.slen); |
| p += m->desc.media.slen; |
| *p++ = ' '; |
| printed = pj_utoa(m->desc.port, p); |
| p += printed; |
| if (m->desc.port_count > 1) { |
| *p++ = '/'; |
| printed = pj_utoa(m->desc.port_count, p); |
| p += printed; |
| } |
| *p++ = ' '; |
| pj_memcpy(p, m->desc.transport.ptr, m->desc.transport.slen); |
| p += m->desc.transport.slen; |
| for (i=0; i<m->desc.fmt_count; ++i) { |
| *p++ = ' '; |
| pj_memcpy(p, m->desc.fmt[i].ptr, m->desc.fmt[i].slen); |
| p += m->desc.fmt[i].slen; |
| } |
| *p++ = '\r'; |
| *p++ = '\n'; |
| |
| /* print connection info, if present. */ |
| if (m->conn) { |
| printed = print_connection_info(m->conn, p, (int)(end-p)); |
| if (printed < 0) { |
| return -1; |
| } |
| p += printed; |
| } |
| |
| /* print optional bandwidth info. */ |
| for (i=0; i<m->bandw_count; ++i) { |
| printed = (int)print_bandw(m->bandw[i], p, end-p); |
| if (printed < 0) { |
| return -1; |
| } |
| p += printed; |
| } |
| |
| /* print attributes. */ |
| for (i=0; i<m->attr_count; ++i) { |
| printed = (int)print_attr(m->attr[i], p, end-p); |
| if (printed < 0) { |
| return -1; |
| } |
| p += printed; |
| } |
| |
| return (int)(p-buf); |
| } |
| |
| PJ_DEF(pjmedia_sdp_media*) pjmedia_sdp_media_clone( |
| pj_pool_t *pool, |
| const pjmedia_sdp_media *rhs) |
| { |
| unsigned int i; |
| pjmedia_sdp_media *m = PJ_POOL_ALLOC_T(pool, pjmedia_sdp_media); |
| PJ_ASSERT_RETURN(m != NULL, NULL); |
| |
| pj_strdup (pool, &m->desc.media, &rhs->desc.media); |
| m->desc.port = rhs->desc.port; |
| m->desc.port_count = rhs->desc.port_count; |
| pj_strdup (pool, &m->desc.transport, &rhs->desc.transport); |
| m->desc.fmt_count = rhs->desc.fmt_count; |
| for (i=0; i<rhs->desc.fmt_count; ++i) |
| pj_strdup(pool, &m->desc.fmt[i], &rhs->desc.fmt[i]); |
| |
| if (rhs->conn) { |
| m->conn = pjmedia_sdp_conn_clone (pool, rhs->conn); |
| PJ_ASSERT_RETURN(m->conn != NULL, NULL); |
| } else { |
| m->conn = NULL; |
| } |
| |
| m->bandw_count = rhs->bandw_count; |
| for (i=0; i < rhs->bandw_count; ++i) { |
| m->bandw[i] = pjmedia_sdp_bandw_clone (pool, rhs->bandw[i]); |
| PJ_ASSERT_RETURN(m->bandw[i] != NULL, NULL); |
| } |
| |
| m->attr_count = rhs->attr_count; |
| for (i=0; i < rhs->attr_count; ++i) { |
| m->attr[i] = pjmedia_sdp_attr_clone (pool, rhs->attr[i]); |
| PJ_ASSERT_RETURN(m->attr[i] != NULL, NULL); |
| } |
| |
| return m; |
| } |
| |
| PJ_DEF(pjmedia_sdp_attr*) pjmedia_sdp_media_find_attr( |
| const pjmedia_sdp_media *m, |
| const pj_str_t *name, const pj_str_t *fmt) |
| { |
| PJ_ASSERT_RETURN(m && name, NULL); |
| return pjmedia_sdp_attr_find(m->attr_count, m->attr, name, fmt); |
| } |
| |
| |
| |
| PJ_DEF(pjmedia_sdp_attr*) pjmedia_sdp_media_find_attr2( |
| const pjmedia_sdp_media *m, |
| const char *name, const pj_str_t *fmt) |
| { |
| PJ_ASSERT_RETURN(m && name, NULL); |
| return pjmedia_sdp_attr_find2(m->attr_count, m->attr, name, fmt); |
| } |
| |
| |
| PJ_DEF(pj_status_t) pjmedia_sdp_media_add_attr( pjmedia_sdp_media *m, |
| pjmedia_sdp_attr *attr) |
| { |
| return pjmedia_sdp_attr_add(&m->attr_count, m->attr, attr); |
| } |
| |
| PJ_DEF(pj_status_t) pjmedia_sdp_session_add_attr(pjmedia_sdp_session *s, |
| pjmedia_sdp_attr *attr) |
| { |
| return pjmedia_sdp_attr_add(&s->attr_count, s->attr, attr); |
| } |
| |
| PJ_DEF(unsigned) pjmedia_sdp_media_remove_all_attr(pjmedia_sdp_media *m, |
| const char *name) |
| { |
| return pjmedia_sdp_attr_remove_all(&m->attr_count, m->attr, name); |
| } |
| |
| PJ_DEF(pj_status_t) pjmedia_sdp_media_remove_attr(pjmedia_sdp_media *m, |
| pjmedia_sdp_attr *attr) |
| { |
| return pjmedia_sdp_attr_remove(&m->attr_count, m->attr, attr); |
| } |
| |
| static int print_session(const pjmedia_sdp_session *ses, |
| char *buf, pj_ssize_t len) |
| { |
| char *p = buf; |
| char *end = buf+len; |
| unsigned i; |
| int printed; |
| |
| /* Check length for v= and o= lines. */ |
| if (len < 5+ |
| 2+ses->origin.user.slen+18+ |
| ses->origin.net_type.slen+ses->origin.addr.slen + 2) |
| { |
| return -1; |
| } |
| |
| /* SDP version (v= line) */ |
| pj_memcpy(p, "v=0\r\n", 5); |
| p += 5; |
| |
| /* Owner (o=) line. */ |
| *p++ = 'o'; |
| *p++ = '='; |
| pj_memcpy(p, ses->origin.user.ptr, ses->origin.user.slen); |
| p += ses->origin.user.slen; |
| *p++ = ' '; |
| printed = pj_utoa(ses->origin.id, p); |
| p += printed; |
| *p++ = ' '; |
| printed = pj_utoa(ses->origin.version, p); |
| p += printed; |
| *p++ = ' '; |
| pj_memcpy(p, ses->origin.net_type.ptr, ses->origin.net_type.slen); |
| p += ses->origin.net_type.slen; |
| *p++ = ' '; |
| pj_memcpy(p, ses->origin.addr_type.ptr, ses->origin.addr_type.slen); |
| p += ses->origin.addr_type.slen; |
| *p++ = ' '; |
| pj_memcpy(p, ses->origin.addr.ptr, ses->origin.addr.slen); |
| p += ses->origin.addr.slen; |
| *p++ = '\r'; |
| *p++ = '\n'; |
| |
| /* Session name (s=) line. */ |
| if ((end-p) < 8+ses->name.slen) { |
| return -1; |
| } |
| *p++ = 's'; |
| *p++ = '='; |
| pj_memcpy(p, ses->name.ptr, ses->name.slen); |
| p += ses->name.slen; |
| *p++ = '\r'; |
| *p++ = '\n'; |
| |
| /* Connection line (c=) if exist. */ |
| if (ses->conn) { |
| printed = print_connection_info(ses->conn, p, (int)(end-p)); |
| if (printed < 1) { |
| return -1; |
| } |
| p += printed; |
| } |
| |
| /* print optional bandwidth info. */ |
| for (i=0; i<ses->bandw_count; ++i) { |
| printed = (int)print_bandw(ses->bandw[i], p, end-p); |
| if (printed < 1) { |
| return -1; |
| } |
| p += printed; |
| } |
| |
| /* Time */ |
| if ((end-p) < 24) { |
| return -1; |
| } |
| *p++ = 't'; |
| *p++ = '='; |
| printed = pj_utoa(ses->time.start, p); |
| p += printed; |
| *p++ = ' '; |
| printed = pj_utoa(ses->time.stop, p); |
| p += printed; |
| *p++ = '\r'; |
| *p++ = '\n'; |
| |
| /* Print all attribute (a=) lines. */ |
| for (i=0; i<ses->attr_count; ++i) { |
| printed = (int)print_attr(ses->attr[i], p, end-p); |
| if (printed < 0) { |
| return -1; |
| } |
| p += printed; |
| } |
| |
| /* Print media (m=) lines. */ |
| for (i=0; i<ses->media_count; ++i) { |
| printed = print_media_desc(ses->media[i], p, (int)(end-p)); |
| if (printed < 0) { |
| return -1; |
| } |
| p += printed; |
| } |
| |
| return (int)(p-buf); |
| } |
| |
| /****************************************************************************** |
| * PARSERS |
| */ |
| |
| static void parse_version(pj_scanner *scanner, parse_context *ctx) |
| { |
| ctx->last_error = PJMEDIA_SDP_EINVER; |
| |
| /* check equal sign */ |
| if (*(scanner->curptr+1) != '=') { |
| on_scanner_error(scanner); |
| return; |
| } |
| |
| /* check version is 0 */ |
| if (*(scanner->curptr+2) != '0') { |
| on_scanner_error(scanner); |
| return; |
| } |
| |
| /* We've got what we're looking for, skip anything until newline */ |
| pj_scan_skip_line(scanner); |
| } |
| |
| static void parse_origin(pj_scanner *scanner, pjmedia_sdp_session *ses, |
| parse_context *ctx) |
| { |
| pj_str_t str; |
| |
| ctx->last_error = PJMEDIA_SDP_EINORIGIN; |
| |
| /* check equal sign */ |
| if (*(scanner->curptr+1) != '=') { |
| on_scanner_error(scanner); |
| return; |
| } |
| |
| /* o= */ |
| pj_scan_advance_n(scanner, 2, SKIP_WS); |
| |
| /* username. */ |
| pj_scan_get_until_ch(scanner, ' ', &ses->origin.user); |
| pj_scan_get_char(scanner); |
| |
| /* id */ |
| pj_scan_get_until_ch(scanner, ' ', &str); |
| ses->origin.id = pj_strtoul(&str); |
| pj_scan_get_char(scanner); |
| |
| /* version */ |
| pj_scan_get_until_ch(scanner, ' ', &str); |
| ses->origin.version = pj_strtoul(&str); |
| pj_scan_get_char(scanner); |
| |
| /* network-type */ |
| pj_scan_get_until_ch(scanner, ' ', &ses->origin.net_type); |
| pj_scan_get_char(scanner); |
| |
| /* addr-type */ |
| pj_scan_get_until_ch(scanner, ' ', &ses->origin.addr_type); |
| pj_scan_get_char(scanner); |
| |
| /* address */ |
| pj_scan_get_until_chr(scanner, " \t\r\n", &ses->origin.addr); |
| |
| /* We've got what we're looking for, skip anything until newline */ |
| pj_scan_skip_line(scanner); |
| |
| } |
| |
| static void parse_time(pj_scanner *scanner, pjmedia_sdp_session *ses, |
| parse_context *ctx) |
| { |
| pj_str_t str; |
| |
| ctx->last_error = PJMEDIA_SDP_EINTIME; |
| |
| /* check equal sign */ |
| if (*(scanner->curptr+1) != '=') { |
| on_scanner_error(scanner); |
| return; |
| } |
| |
| /* t= */ |
| pj_scan_advance_n(scanner, 2, SKIP_WS); |
| |
| /* start time */ |
| pj_scan_get_until_ch(scanner, ' ', &str); |
| ses->time.start = pj_strtoul(&str); |
| |
| pj_scan_get_char(scanner); |
| |
| /* stop time */ |
| pj_scan_get_until_chr(scanner, " \t\r\n", &str); |
| ses->time.stop = pj_strtoul(&str); |
| |
| /* We've got what we're looking for, skip anything until newline */ |
| pj_scan_skip_line(scanner); |
| } |
| |
| static void parse_generic_line(pj_scanner *scanner, pj_str_t *str, |
| parse_context *ctx) |
| { |
| ctx->last_error = PJMEDIA_SDP_EINSDP; |
| |
| /* check equal sign */ |
| if (*(scanner->curptr+1) != '=') { |
| on_scanner_error(scanner); |
| return; |
| } |
| |
| /* x= */ |
| pj_scan_advance_n(scanner, 2, SKIP_WS); |
| |
| /* get anything until newline (including whitespaces). */ |
| pj_scan_get_until_chr(scanner, "\r\n", str); |
| |
| /* newline. */ |
| pj_scan_get_newline(scanner); |
| } |
| |
| static void parse_connection_info(pj_scanner *scanner, pjmedia_sdp_conn *conn, |
| parse_context *ctx) |
| { |
| ctx->last_error = PJMEDIA_SDP_EINCONN; |
| |
| /* c= */ |
| pj_scan_advance_n(scanner, 2, SKIP_WS); |
| |
| /* network-type */ |
| pj_scan_get_until_ch(scanner, ' ', &conn->net_type); |
| pj_scan_get_char(scanner); |
| |
| /* addr-type */ |
| pj_scan_get_until_ch(scanner, ' ', &conn->addr_type); |
| pj_scan_get_char(scanner); |
| |
| /* address. */ |
| pj_scan_get_until_chr(scanner, "/ \t\r\n", &conn->addr); |
| PJ_TODO(PARSE_SDP_CONN_ADDRESS_SUBFIELDS); |
| |
| /* We've got what we're looking for, skip anything until newline */ |
| pj_scan_skip_line(scanner); |
| } |
| |
| static void parse_bandwidth_info(pj_scanner *scanner, pjmedia_sdp_bandw *bandw, |
| parse_context *ctx) |
| { |
| pj_str_t str; |
| |
| ctx->last_error = PJMEDIA_SDP_EINBANDW; |
| |
| /* b= */ |
| pj_scan_advance_n(scanner, 2, SKIP_WS); |
| |
| /* modifier */ |
| pj_scan_get_until_ch(scanner, ':', &bandw->modifier); |
| pj_scan_get_char(scanner); |
| |
| /* value */ |
| pj_scan_get_until_chr(scanner, " \t\r\n", &str); |
| bandw->value = pj_strtoul(&str); |
| |
| /* We've got what we're looking for, skip anything until newline */ |
| pj_scan_skip_line(scanner); |
| } |
| |
| static void parse_media(pj_scanner *scanner, pjmedia_sdp_media *med, |
| parse_context *ctx) |
| { |
| pj_str_t str; |
| |
| ctx->last_error = PJMEDIA_SDP_EINMEDIA; |
| |
| /* check the equal sign */ |
| if (*(scanner->curptr+1) != '=') { |
| on_scanner_error(scanner); |
| return; |
| } |
| |
| /* m= */ |
| pj_scan_advance_n(scanner, 2, SKIP_WS); |
| |
| /* type */ |
| pj_scan_get_until_ch(scanner, ' ', &med->desc.media); |
| pj_scan_get_char(scanner); |
| |
| /* port */ |
| pj_scan_get(scanner, &cs_token, &str); |
| med->desc.port = (unsigned short)pj_strtoul(&str); |
| if (*scanner->curptr == '/') { |
| /* port count */ |
| pj_scan_get_char(scanner); |
| pj_scan_get(scanner, &cs_token, &str); |
| med->desc.port_count = pj_strtoul(&str); |
| |
| } else { |
| med->desc.port_count = 0; |
| } |
| |
| if (pj_scan_get_char(scanner) != ' ') { |
| PJ_THROW(SYNTAX_ERROR); |
| } |
| |
| /* transport */ |
| pj_scan_get_until_chr(scanner, " \t\r\n", &med->desc.transport); |
| |
| /* format list */ |
| med->desc.fmt_count = 0; |
| while (*scanner->curptr == ' ') { |
| pj_str_t fmt; |
| |
| pj_scan_get_char(scanner); |
| |
| /* Check again for the end of the line */ |
| if ((*scanner->curptr == '\r') || (*scanner->curptr == '\n')) |
| break; |
| |
| pj_scan_get(scanner, &cs_token, &fmt); |
| if (med->desc.fmt_count < PJMEDIA_MAX_SDP_FMT) |
| med->desc.fmt[med->desc.fmt_count++] = fmt; |
| else |
| PJ_PERROR(2,(THIS_FILE, PJ_ETOOMANY, |
| "Error adding SDP media format %.*s, " |
| "format is ignored", |
| (int)fmt.slen, fmt.ptr)); |
| } |
| |
| /* We've got what we're looking for, skip anything until newline */ |
| pj_scan_skip_line(scanner); |
| } |
| |
| static void on_scanner_error(pj_scanner *scanner) |
| { |
| PJ_UNUSED_ARG(scanner); |
| |
| PJ_THROW(SYNTAX_ERROR); |
| } |
| |
| static pjmedia_sdp_attr *parse_attr( pj_pool_t *pool, pj_scanner *scanner, |
| parse_context *ctx) |
| { |
| pjmedia_sdp_attr *attr; |
| |
| ctx->last_error = PJMEDIA_SDP_EINATTR; |
| |
| attr = PJ_POOL_ALLOC_T(pool, pjmedia_sdp_attr); |
| |
| /* check equal sign */ |
| if (*(scanner->curptr+1) != '=') { |
| on_scanner_error(scanner); |
| return NULL; |
| } |
| |
| /* skip a= */ |
| pj_scan_advance_n(scanner, 2, SKIP_WS); |
| |
| /* get attr name. */ |
| pj_scan_get(scanner, &cs_token, &attr->name); |
| |
| if (*scanner->curptr && *scanner->curptr != '\r' && |
| *scanner->curptr != '\n') |
| { |
| /* skip ':' if present. */ |
| if (*scanner->curptr == ':') |
| pj_scan_get_char(scanner); |
| |
| /* get value */ |
| if (*scanner->curptr != '\r' && *scanner->curptr != '\n') { |
| pj_scan_get_until_chr(scanner, "\r\n", &attr->value); |
| } else { |
| attr->value.ptr = NULL; |
| attr->value.slen = 0; |
| } |
| |
| } else { |
| attr->value.ptr = NULL; |
| attr->value.slen = 0; |
| } |
| |
| /* We've got what we're looking for, skip anything until newline */ |
| pj_scan_skip_line(scanner); |
| |
| return attr; |
| } |
| |
| |
| /* |
| * Apply direction attribute in session to all media. |
| */ |
| static void apply_media_direction(pjmedia_sdp_session *sdp) |
| { |
| pjmedia_sdp_attr *dir_attr = NULL; |
| unsigned i; |
| |
| const pj_str_t inactive = { "inactive", 8 }; |
| const pj_str_t sendonly = { "sendonly", 8 }; |
| const pj_str_t recvonly = { "recvonly", 8 }; |
| const pj_str_t sendrecv = { "sendrecv", 8 }; |
| |
| /* Find direction attribute in session, don't need to find default |
| * direction "sendrecv". |
| */ |
| for (i = 0; i < sdp->attr_count && !dir_attr; ++i) { |
| if (!pj_strcmp(&sdp->attr[i]->name, &sendonly) || |
| !pj_strcmp(&sdp->attr[i]->name, &recvonly) || |
| !pj_strcmp(&sdp->attr[i]->name, &inactive)) |
| { |
| dir_attr = sdp->attr[i]; |
| } |
| } |
| |
| /* Found the direction attribute */ |
| if (dir_attr) { |
| /* Remove the direction attribute in session */ |
| pjmedia_sdp_attr_remove(&sdp->attr_count, sdp->attr, dir_attr); |
| |
| /* Apply the direction attribute to all media, but not overriding it |
| * if media already has direction attribute. |
| */ |
| for (i = 0; i < sdp->media_count; ++i) { |
| pjmedia_sdp_media *m; |
| unsigned j; |
| |
| /* Find direction attribute in this media */ |
| m = sdp->media[i]; |
| for (j = 0; j < m->attr_count; ++j) { |
| if (!pj_strcmp(&m->attr[j]->name, &sendrecv) || |
| !pj_strcmp(&m->attr[j]->name, &sendonly) || |
| !pj_strcmp(&m->attr[j]->name, &recvonly) || |
| !pj_strcmp(&m->attr[j]->name, &inactive)) |
| { |
| break; |
| } |
| } |
| |
| /* Not found, apply direction attribute from session */ |
| if (j == m->attr_count) |
| pjmedia_sdp_media_add_attr(m, dir_attr); |
| } |
| } |
| } |
| |
| |
| /* |
| * Parse SDP message. |
| */ |
| PJ_DEF(pj_status_t) pjmedia_sdp_parse( pj_pool_t *pool, |
| char *buf, pj_size_t len, |
| pjmedia_sdp_session **p_sdp) |
| { |
| pj_scanner scanner; |
| pjmedia_sdp_session *session; |
| pjmedia_sdp_media *media = NULL; |
| pjmedia_sdp_attr *attr; |
| pjmedia_sdp_conn *conn; |
| pjmedia_sdp_bandw *bandw; |
| pj_str_t dummy; |
| int cur_name = 254; |
| parse_context ctx; |
| PJ_USE_EXCEPTION; |
| |
| ctx.last_error = PJ_SUCCESS; |
| |
| init_sdp_parser(); |
| |
| pj_scan_init(&scanner, buf, len, 0, &on_scanner_error); |
| session = PJ_POOL_ZALLOC_T(pool, pjmedia_sdp_session); |
| PJ_ASSERT_RETURN(session != NULL, PJ_ENOMEM); |
| |
| /* Ignore leading newlines */ |
| while (*scanner.curptr=='\r' || *scanner.curptr=='\n') |
| pj_scan_get_char(&scanner); |
| |
| PJ_TRY { |
| while (!pj_scan_is_eof(&scanner)) { |
| cur_name = *scanner.curptr; |
| switch (cur_name) { |
| case 'a': |
| attr = parse_attr(pool, &scanner, &ctx); |
| if (attr) { |
| if (media) { |
| pjmedia_sdp_media_add_attr(media, attr); |
| } else { |
| pjmedia_sdp_session_add_attr(session, attr); |
| } |
| } |
| break; |
| case 'o': |
| parse_origin(&scanner, session, &ctx); |
| break; |
| case 's': |
| parse_generic_line(&scanner, &session->name, &ctx); |
| break; |
| case 'c': |
| conn = PJ_POOL_ZALLOC_T(pool, pjmedia_sdp_conn); |
| parse_connection_info(&scanner, conn, &ctx); |
| if (media) { |
| media->conn = conn; |
| } else { |
| session->conn = conn; |
| } |
| break; |
| case 't': |
| parse_time(&scanner, session, &ctx); |
| break; |
| case 'm': |
| media = PJ_POOL_ZALLOC_T(pool, pjmedia_sdp_media); |
| parse_media(&scanner, media, &ctx); |
| if (session->media_count < PJMEDIA_MAX_SDP_MEDIA) |
| session->media[ session->media_count++ ] = media; |
| else |
| PJ_PERROR(2,(THIS_FILE, PJ_ETOOMANY, |
| "Error adding media, media is ignored")); |
| break; |
| case 'v': |
| parse_version(&scanner, &ctx); |
| break; |
| case 13: |
| case 10: |
| pj_scan_get_char(&scanner); |
| /* Allow empty newlines at the end of the message */ |
| while (!pj_scan_is_eof(&scanner)) { |
| if (*scanner.curptr != 13 && *scanner.curptr != 10) { |
| ctx.last_error = PJMEDIA_SDP_EINSDP; |
| on_scanner_error(&scanner); |
| } |
| pj_scan_get_char(&scanner); |
| } |
| break; |
| case 'b': |
| bandw = PJ_POOL_ZALLOC_T(pool, pjmedia_sdp_bandw); |
| parse_bandwidth_info(&scanner, bandw, &ctx); |
| if (media) { |
| media->bandw[media->bandw_count++] = bandw; |
| } else { |
| session->bandw[session->bandw_count++] = bandw; |
| } |
| break; |
| default: |
| if (cur_name >= 'a' && cur_name <= 'z') |
| parse_generic_line(&scanner, &dummy, &ctx); |
| else { |
| ctx.last_error = PJMEDIA_SDP_EINSDP; |
| on_scanner_error(&scanner); |
| } |
| break; |
| } |
| } |
| |
| ctx.last_error = PJ_SUCCESS; |
| |
| } |
| PJ_CATCH_ANY { |
| |
| char errmsg[PJ_ERR_MSG_SIZE]; |
| pj_strerror(ctx.last_error, errmsg, sizeof(errmsg)); |
| |
| PJ_LOG(4, (THIS_FILE, "Error parsing SDP in line %d col %d: %s", |
| scanner.line, pj_scan_get_col(&scanner), |
| errmsg)); |
| |
| session = NULL; |
| |
| pj_assert(ctx.last_error != PJ_SUCCESS); |
| } |
| PJ_END; |
| |
| pj_scan_fini(&scanner); |
| |
| if (session) |
| apply_media_direction(session); |
| |
| *p_sdp = session; |
| return ctx.last_error; |
| } |
| |
| /* |
| * Print SDP description. |
| */ |
| PJ_DEF(int) pjmedia_sdp_print( const pjmedia_sdp_session *desc, |
| char *buf, pj_size_t size) |
| { |
| return print_session(desc, buf, size); |
| } |
| |
| |
| /* |
| * Clone session |
| */ |
| PJ_DEF(pjmedia_sdp_session*) pjmedia_sdp_session_clone( pj_pool_t *pool, |
| const pjmedia_sdp_session *rhs) |
| { |
| pjmedia_sdp_session *sess; |
| unsigned i; |
| |
| PJ_ASSERT_RETURN(pool && rhs, NULL); |
| |
| sess = PJ_POOL_ZALLOC_T(pool, pjmedia_sdp_session); |
| PJ_ASSERT_RETURN(sess != NULL, NULL); |
| |
| /* Clone origin line. */ |
| pj_strdup(pool, &sess->origin.user, &rhs->origin.user); |
| sess->origin.id = rhs->origin.id; |
| sess->origin.version = rhs->origin.version; |
| pj_strdup(pool, &sess->origin.net_type, &rhs->origin.net_type); |
| pj_strdup(pool, &sess->origin.addr_type, &rhs->origin.addr_type); |
| pj_strdup(pool, &sess->origin.addr, &rhs->origin.addr); |
| |
| /* Clone subject line. */ |
| pj_strdup(pool, &sess->name, &rhs->name); |
| |
| /* Clone connection line */ |
| if (rhs->conn) { |
| sess->conn = pjmedia_sdp_conn_clone(pool, rhs->conn); |
| PJ_ASSERT_RETURN(sess->conn != NULL, NULL); |
| } |
| |
| /* Duplicate bandwidth info */ |
| sess->bandw_count = rhs->bandw_count; |
| for (i=0; i<rhs->bandw_count; ++i) { |
| sess->bandw[i] = pjmedia_sdp_bandw_clone(pool, rhs->bandw[i]); |
| } |
| |
| /* Clone time line. */ |
| sess->time.start = rhs->time.start; |
| sess->time.stop = rhs->time.stop; |
| |
| /* Duplicate session attributes. */ |
| sess->attr_count = rhs->attr_count; |
| for (i=0; i<rhs->attr_count; ++i) { |
| sess->attr[i] = pjmedia_sdp_attr_clone(pool, rhs->attr[i]); |
| } |
| |
| /* Duplicate media descriptors. */ |
| sess->media_count = rhs->media_count; |
| for (i=0; i<rhs->media_count; ++i) { |
| sess->media[i] = pjmedia_sdp_media_clone(pool, rhs->media[i]); |
| } |
| |
| return sess; |
| } |
| |
| |
| #define CHECK(exp,ret) do { \ |
| /*pj_assert(exp);*/ \ |
| if (!(exp)) \ |
| return ret; \ |
| } while (0) |
| |
| /* Validate SDP connetion info. */ |
| static pj_status_t validate_sdp_conn(const pjmedia_sdp_conn *c) |
| { |
| CHECK( c, PJ_EINVAL); |
| CHECK( pj_strcmp2(&c->net_type, "IN")==0, PJMEDIA_SDP_EINCONN); |
| CHECK( pj_strcmp2(&c->addr_type, "IP4")==0 || |
| pj_strcmp2(&c->addr_type, "IP6")==0, |
| PJMEDIA_SDP_EINCONN); |
| CHECK( c->addr.slen != 0, PJMEDIA_SDP_EINCONN); |
| |
| return PJ_SUCCESS; |
| } |
| |
| |
| /* Validate SDP session descriptor. */ |
| PJ_DEF(pj_status_t) pjmedia_sdp_validate(const pjmedia_sdp_session *sdp) |
| { |
| return pjmedia_sdp_validate2(sdp, PJ_TRUE); |
| } |
| |
| |
| /* Validate SDP session descriptor. */ |
| PJ_DEF(pj_status_t) pjmedia_sdp_validate2(const pjmedia_sdp_session *sdp, |
| pj_bool_t strict) |
| { |
| unsigned i; |
| const pj_str_t STR_RTPMAP = { "rtpmap", 6 }; |
| |
| CHECK( sdp != NULL, PJ_EINVAL); |
| |
| /* Validate origin line. */ |
| CHECK( sdp->origin.user.slen != 0, PJMEDIA_SDP_EINORIGIN); |
| CHECK( pj_strcmp2(&sdp->origin.net_type, "IN")==0, |
| PJMEDIA_SDP_EINORIGIN); |
| CHECK( pj_strcmp2(&sdp->origin.addr_type, "IP4")==0 || |
| pj_strcmp2(&sdp->origin.addr_type, "IP6")==0, |
| PJMEDIA_SDP_EINORIGIN); |
| CHECK( sdp->origin.addr.slen != 0, PJMEDIA_SDP_EINORIGIN); |
| |
| /* Validate subject line. */ |
| CHECK( sdp->name.slen != 0, PJMEDIA_SDP_EINNAME); |
| |
| /* Ignore start and stop time. */ |
| |
| /* If session level connection info is present, validate it. */ |
| if (sdp->conn) { |
| pj_status_t status = validate_sdp_conn(sdp->conn); |
| if (status != PJ_SUCCESS) |
| return status; |
| } |
| |
| /* Validate each media. */ |
| for (i=0; i<sdp->media_count; ++i) { |
| const pjmedia_sdp_media *m = sdp->media[i]; |
| unsigned j; |
| |
| /* Validate the m= line. */ |
| CHECK( m->desc.media.slen != 0, PJMEDIA_SDP_EINMEDIA); |
| CHECK( m->desc.transport.slen != 0, PJMEDIA_SDP_EINMEDIA); |
| CHECK( m->desc.fmt_count != 0 || m->desc.port==0, PJMEDIA_SDP_ENOFMT); |
| |
| /* If media level connection info is present, validate it. */ |
| if (m->conn) { |
| pj_status_t status = validate_sdp_conn(m->conn); |
| if (status != PJ_SUCCESS) |
| return status; |
| } |
| |
| /* If media doesn't have connection info, then connection info |
| * must be present in the session. |
| */ |
| if (m->conn == NULL) { |
| if (sdp->conn == NULL) |
| if (strict || m->desc.port != 0) |
| return PJMEDIA_SDP_EMISSINGCONN; |
| } |
| |
| /* Verify payload type. */ |
| for (j=0; j<m->desc.fmt_count; ++j) { |
| |
| /* Arrgh noo!! Payload type can be non-numeric!! |
| * RTC based programs sends "null" for instant messaging! |
| */ |
| if (pj_isdigit(*m->desc.fmt[j].ptr)) { |
| unsigned pt = pj_strtoul(&m->desc.fmt[j]); |
| |
| /* Payload type is between 0 and 127. |
| */ |
| CHECK( pt <= 127, PJMEDIA_SDP_EINPT); |
| |
| /* If port is not zero, then for each dynamic payload type, an |
| * rtpmap attribute must be specified. |
| */ |
| if (m->desc.port != 0 && pt >= 96) { |
| const pjmedia_sdp_attr *a; |
| |
| a = pjmedia_sdp_media_find_attr(m, &STR_RTPMAP, |
| &m->desc.fmt[j]); |
| CHECK( a != NULL, PJMEDIA_SDP_EMISSINGRTPMAP); |
| } |
| } |
| } |
| } |
| |
| /* Looks good. */ |
| return PJ_SUCCESS; |
| } |
| |
| |
| PJ_DEF(pj_status_t) pjmedia_sdp_transport_cmp( const pj_str_t *t1, |
| const pj_str_t *t2) |
| { |
| static const pj_str_t ID_RTP_AVP = { "RTP/AVP", 7 }; |
| static const pj_str_t ID_RTP_SAVP = { "RTP/SAVP", 8 }; |
| |
| /* Exactly equal? */ |
| if (pj_stricmp(t1, t2) == 0) |
| return PJ_SUCCESS; |
| |
| /* Compatible? */ |
| if ((!pj_stricmp(t1, &ID_RTP_AVP) || !pj_stricmp(t1, &ID_RTP_SAVP)) && |
| (!pj_stricmp(t2, &ID_RTP_AVP) || !pj_stricmp(t2, &ID_RTP_SAVP))) |
| return PJ_SUCCESS; |
| |
| return PJMEDIA_SDP_ETPORTNOTEQUAL; |
| } |
| |
| |
| PJ_DEF(pj_status_t) pjmedia_sdp_media_deactivate(pj_pool_t *pool, |
| pjmedia_sdp_media *m) |
| { |
| PJ_ASSERT_RETURN(m, PJ_EINVAL); |
| PJ_UNUSED_ARG(pool); |
| |
| /* Set port to zero */ |
| m->desc.port = 0; |
| |
| /* And remove attributes */ |
| m->attr_count = 0; |
| |
| return PJ_SUCCESS; |
| } |
| |
| |
| PJ_DEF(pjmedia_sdp_media*) pjmedia_sdp_media_clone_deactivate( |
| pj_pool_t *pool, |
| const pjmedia_sdp_media *rhs) |
| { |
| unsigned int i; |
| pjmedia_sdp_media *m; |
| |
| PJ_ASSERT_RETURN(pool && rhs, NULL); |
| |
| m = PJ_POOL_ZALLOC_T(pool, pjmedia_sdp_media); |
| pj_memcpy(m, rhs, sizeof(*m)); |
| |
| /* Clone the media line only */ |
| pj_strdup (pool, &m->desc.media, &rhs->desc.media); |
| pj_strdup (pool, &m->desc.transport, &rhs->desc.transport); |
| for (i=0; i<rhs->desc.fmt_count; ++i) |
| pj_strdup(pool, &m->desc.fmt[i], &rhs->desc.fmt[i]); |
| |
| if (rhs->conn) { |
| m->conn = pjmedia_sdp_conn_clone (pool, rhs->conn); |
| PJ_ASSERT_RETURN(m->conn != NULL, NULL); |
| } |
| |
| m->bandw_count = rhs->bandw_count; |
| for (i=0; i < rhs->bandw_count; ++i) { |
| m->bandw[i] = pjmedia_sdp_bandw_clone (pool, rhs->bandw[i]); |
| PJ_ASSERT_RETURN(m->bandw[i] != NULL, NULL); |
| } |
| |
| /* And deactivate it */ |
| pjmedia_sdp_media_deactivate(pool, m); |
| |
| return m; |
| } |