| /* $Id$ */ |
| /* |
| * 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 <pj/assert.h> |
| #include <pj/string.h> |
| |
| |
| /* Compare connection line. */ |
| static pj_status_t compare_conn(const pjmedia_sdp_conn *c1, |
| const pjmedia_sdp_conn *c2) |
| { |
| /* Compare network type. */ |
| if (pj_strcmp(&c1->net_type, &c2->net_type) != 0) |
| return PJMEDIA_SDP_ECONNNOTEQUAL; |
| |
| /* Compare address type. */ |
| if (pj_strcmp(&c1->addr_type, &c2->addr_type) != 0) |
| return PJMEDIA_SDP_ECONNNOTEQUAL; |
| |
| /* Compare address. */ |
| if (pj_strcmp(&c1->addr, &c2->addr) != 0) |
| return PJMEDIA_SDP_ECONNNOTEQUAL; |
| |
| return PJ_SUCCESS; |
| } |
| |
| /* Compare attributes array. */ |
| static pj_status_t compare_attr_imp(unsigned count1, |
| pjmedia_sdp_attr *const attr1[], |
| unsigned count2, |
| pjmedia_sdp_attr *const attr2[]) |
| { |
| pj_status_t status; |
| unsigned i; |
| const pj_str_t inactive = { "inactive", 8 }; |
| const pj_str_t sendrecv = { "sendrecv", 8 }; |
| const pj_str_t sendonly = { "sendonly", 8 }; |
| const pj_str_t recvonly = { "recvonly", 8 }; |
| const pj_str_t fmtp = { "fmtp", 4 }; |
| const pj_str_t rtpmap = { "rtpmap", 6 }; |
| |
| /* For simplicity, we only compare the following attributes, and ignore |
| * the others: |
| * - direction, eg. inactive, sendonly, recvonly, sendrecv |
| * - fmtp for each payload. |
| * - rtpmap for each payload. |
| */ |
| for (i=0; i<count1; ++i) { |
| const pjmedia_sdp_attr *a1 = attr1[i]; |
| |
| if (pj_strcmp(&a1->name, &inactive) == 0 || |
| pj_strcmp(&a1->name, &sendrecv) == 0 || |
| pj_strcmp(&a1->name, &sendonly) == 0 || |
| pj_strcmp(&a1->name, &recvonly) == 0) |
| { |
| /* For inactive, sendrecv, sendonly, and recvonly attributes, |
| * the same attribute must be present on the other SDP. |
| */ |
| const pjmedia_sdp_attr *a2; |
| a2 = pjmedia_sdp_attr_find(count2, attr2, &a1->name, NULL); |
| if (!a2) |
| return PJMEDIA_SDP_EDIRNOTEQUAL; |
| |
| } else if (pj_strcmp(&a1->name, &fmtp) == 0) { |
| /* For fmtp attribute, find the fmtp attribute in the other SDP |
| * for the same payload type, and compare the fmtp param/value. |
| */ |
| pjmedia_sdp_fmtp fmtp1, fmtp2; |
| const pjmedia_sdp_attr *a2; |
| |
| status = pjmedia_sdp_attr_get_fmtp(a1, &fmtp1); |
| if (status != PJ_SUCCESS) |
| return PJMEDIA_SDP_EFMTPNOTEQUAL; |
| |
| a2 = pjmedia_sdp_attr_find(count2, attr2, &a1->name, &fmtp1.fmt); |
| if (!a2) |
| return PJMEDIA_SDP_EFMTPNOTEQUAL; |
| |
| status = pjmedia_sdp_attr_get_fmtp(a2, &fmtp2); |
| if (status != PJ_SUCCESS) |
| return PJMEDIA_SDP_EFMTPNOTEQUAL; |
| |
| if (pj_strcmp(&fmtp1.fmt_param, &fmtp2.fmt_param) != 0) |
| return PJMEDIA_SDP_EFMTPNOTEQUAL; |
| |
| } else if (pj_strcmp(&a1->name, &rtpmap) == 0) { |
| /* For rtpmap attribute, find rtpmap attribute on the other SDP |
| * for the same payload type, and compare both rtpmap atribute |
| * values. |
| */ |
| pjmedia_sdp_rtpmap r1, r2; |
| const pjmedia_sdp_attr *a2; |
| |
| status = pjmedia_sdp_attr_get_rtpmap(a1, &r1); |
| if (status != PJ_SUCCESS) |
| return PJMEDIA_SDP_ERTPMAPNOTEQUAL; |
| |
| a2 = pjmedia_sdp_attr_find(count2, attr2, &a1->name, &r1.pt); |
| if (!a2) |
| return PJMEDIA_SDP_ERTPMAPNOTEQUAL; |
| |
| status = pjmedia_sdp_attr_get_rtpmap(a2, &r2); |
| if (status != PJ_SUCCESS) |
| return PJMEDIA_SDP_ERTPMAPNOTEQUAL; |
| |
| if (pj_strcmp(&r1.pt, &r2.pt) != 0) |
| return PJMEDIA_SDP_ERTPMAPNOTEQUAL; |
| if (pj_strcmp(&r1.enc_name, &r2.enc_name) != 0) |
| return PJMEDIA_SDP_ERTPMAPNOTEQUAL; |
| if (r1.clock_rate != r2.clock_rate) |
| return PJMEDIA_SDP_ERTPMAPNOTEQUAL; |
| if (pj_strcmp(&r1.param, &r2.param) != 0) |
| return PJMEDIA_SDP_ERTPMAPNOTEQUAL; |
| } |
| } |
| |
| return PJ_SUCCESS; |
| } |
| |
| |
| /* Compare attributes array. */ |
| static pj_status_t compare_attr(unsigned count1, |
| pjmedia_sdp_attr *const attr1[], |
| unsigned count2, |
| pjmedia_sdp_attr *const attr2[]) |
| { |
| pj_status_t status; |
| |
| status = compare_attr_imp(count1, attr1, count2, attr2); |
| if (status != PJ_SUCCESS) |
| return status; |
| |
| status = compare_attr_imp(count2, attr2, count1, attr1); |
| if (status != PJ_SUCCESS) |
| return status; |
| |
| return PJ_SUCCESS; |
| } |
| |
| /* Compare media descriptor */ |
| PJ_DEF(pj_status_t) pjmedia_sdp_media_cmp( const pjmedia_sdp_media *sd1, |
| const pjmedia_sdp_media *sd2, |
| unsigned option) |
| { |
| unsigned i; |
| pj_status_t status; |
| |
| PJ_ASSERT_RETURN(sd1 && sd2 && option==0, PJ_EINVAL); |
| |
| PJ_UNUSED_ARG(option); |
| |
| /* Compare media type. */ |
| if (pj_strcmp(&sd1->desc.media, &sd2->desc.media) != 0) |
| return PJMEDIA_SDP_EMEDIANOTEQUAL; |
| |
| /* Compare port number. */ |
| if (sd1->desc.port != sd2->desc.port) |
| return PJMEDIA_SDP_EPORTNOTEQUAL; |
| |
| /* Compare port count. */ |
| if (sd1->desc.port_count != sd2->desc.port_count) |
| return PJMEDIA_SDP_EPORTNOTEQUAL; |
| |
| /* Compare transports. */ |
| if (pj_strcmp(&sd1->desc.transport, &sd2->desc.transport) != 0) |
| return PJMEDIA_SDP_ETPORTNOTEQUAL; |
| |
| /* For zeroed port media, stop comparing here */ |
| if (sd1->desc.port == 0) |
| return PJ_SUCCESS; |
| |
| /* Compare number of formats. */ |
| if (sd1->desc.fmt_count != sd2->desc.fmt_count) |
| return PJMEDIA_SDP_EFORMATNOTEQUAL; |
| |
| /* Compare formats, in order. */ |
| for (i=0; i<sd1->desc.fmt_count; ++i) { |
| if (pj_strcmp(&sd1->desc.fmt[i], &sd2->desc.fmt[i]) != 0) |
| return PJMEDIA_SDP_EFORMATNOTEQUAL; |
| } |
| |
| /* Compare connection line, if they exist. */ |
| if (sd1->conn) { |
| if (!sd2->conn) |
| return PJMEDIA_SDP_EMEDIANOTEQUAL; |
| status = compare_conn(sd1->conn, sd2->conn); |
| } else { |
| if (sd2->conn) |
| return PJMEDIA_SDP_EMEDIANOTEQUAL; |
| } |
| |
| /* Compare attributes. */ |
| status = compare_attr(sd1->attr_count, sd1->attr, |
| sd2->attr_count, sd2->attr); |
| if (status != PJ_SUCCESS) |
| return status; |
| |
| /* Looks equal */ |
| return PJ_SUCCESS; |
| } |
| |
| /* |
| * Compare two SDP session for equality. |
| */ |
| PJ_DEF(pj_status_t) pjmedia_sdp_session_cmp( const pjmedia_sdp_session *sd1, |
| const pjmedia_sdp_session *sd2, |
| unsigned option) |
| { |
| unsigned i; |
| pj_status_t status; |
| |
| PJ_ASSERT_RETURN(sd1 && sd2 && option==0, PJ_EINVAL); |
| |
| PJ_UNUSED_ARG(option); |
| |
| /* Compare the origin line. */ |
| if (pj_strcmp(&sd1->origin.user, &sd2->origin.user) != 0) |
| return PJMEDIA_SDP_EORIGINNOTEQUAL; |
| |
| if (sd1->origin.id != sd2->origin.id) |
| return PJMEDIA_SDP_EORIGINNOTEQUAL; |
| |
| if (sd1->origin.version != sd2->origin.version) |
| return PJMEDIA_SDP_EORIGINNOTEQUAL; |
| |
| if (pj_strcmp(&sd1->origin.net_type, &sd2->origin.net_type) != 0) |
| return PJMEDIA_SDP_EORIGINNOTEQUAL; |
| |
| if (pj_strcmp(&sd1->origin.addr_type, &sd2->origin.addr_type) != 0) |
| return PJMEDIA_SDP_EORIGINNOTEQUAL; |
| |
| if (pj_strcmp(&sd1->origin.addr, &sd2->origin.addr) != 0) |
| return PJMEDIA_SDP_EORIGINNOTEQUAL; |
| |
| |
| /* Compare the subject line. */ |
| if (pj_strcmp(&sd1->name, &sd2->name) != 0) |
| return PJMEDIA_SDP_ENAMENOTEQUAL; |
| |
| /* Compare connection line, when they exist */ |
| if (sd1->conn) { |
| if (!sd2->conn) |
| return PJMEDIA_SDP_ECONNNOTEQUAL; |
| status = compare_conn(sd1->conn, sd2->conn); |
| if (status != PJ_SUCCESS) |
| return status; |
| } else { |
| if (sd2->conn) |
| return PJMEDIA_SDP_ECONNNOTEQUAL; |
| } |
| |
| /* Compare time line. */ |
| if (sd1->time.start != sd2->time.start) |
| return PJMEDIA_SDP_ETIMENOTEQUAL; |
| |
| if (sd1->time.stop != sd2->time.stop) |
| return PJMEDIA_SDP_ETIMENOTEQUAL; |
| |
| /* Compare attributes. */ |
| status = compare_attr(sd1->attr_count, sd1->attr, |
| sd2->attr_count, sd2->attr); |
| if (status != PJ_SUCCESS) |
| return status; |
| |
| /* Compare media lines. */ |
| if (sd1->media_count != sd2->media_count) |
| return PJMEDIA_SDP_EMEDIANOTEQUAL; |
| |
| for (i=0; i<sd1->media_count; ++i) { |
| status = pjmedia_sdp_media_cmp(sd1->media[i], sd2->media[i], 0); |
| if (status != PJ_SUCCESS) |
| return status; |
| } |
| |
| /* Looks equal. */ |
| return PJ_SUCCESS; |
| } |
| |
| |
| PJ_DEF(pj_status_t) pjmedia_sdp_conn_cmp(const pjmedia_sdp_conn *conn1, |
| const pjmedia_sdp_conn *conn2, |
| unsigned option) |
| { |
| PJ_UNUSED_ARG(option); |
| return compare_conn(conn1, conn2); |
| } |