/* $Id$ */ /* * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) * Copyright (C) 2003-2008 Benny Prijono * * 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 #include #include #include /* 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; iname, &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; idesc.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; imedia_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); }