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/* $Id$ */
/*
* 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);
}
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