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linphone-iphone/coreapi/sal_eXosip2_sdp.c
Guillaume Beraudo 1b7ed3a9c4 Send ZRTP hello hash in SIP SDP.
2013-03-18 15:58:05 +01:00

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/*
linphone
Copyright (C) 2010 Simon MORLAT (simon.morlat@free.fr)
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 "ortp/port.h"
#include "ortp/b64.h"
#include "ortp/ortp_srtp.h"
#include "sal.h"
#include <eXosip2/eXosip.h>
#define keywordcmp(key,b) strcmp(key,b)
#ifdef FOR_LATER
static char *make_relay_session_id(const char *username, const char *relay){
/*ideally this should be a hash of the parameters with a random part*/
char tmp[128];
int s1=(int)random();
int s2=(int)random();
long long int res=((long long int)s1)<<32 | (long long int) s2;
void *src=&res;
b64_encode(src, sizeof(long long int), tmp, sizeof(tmp));
return osip_strdup(tmp);
}
static void add_relay_info(sdp_message_t *sdp, int mline, const char *relay, const char *relay_session_id){
if (relay) sdp_message_a_attribute_add(sdp, mline,
osip_strdup ("relay-addr"),osip_strdup(relay));
if (relay_session_id) sdp_message_a_attribute_add(sdp, mline,
osip_strdup ("relay-session-id"), osip_strdup(relay_session_id));
}
#endif
static char * int_2char(int a){
char *p=osip_malloc(16);
snprintf(p,16,"%i",a);
return p;
}
/* return the value of attr "field" for payload pt at line pos (field=rtpmap,fmtp...)*/
static const char *sdp_message_a_attr_value_get_with_pt(sdp_message_t *sdp,int pos,int pt,const char *field)
{
int i,tmppt=0,scanned=0;
char *tmp;
sdp_attribute_t *attr;
for (i=0;(attr=sdp_message_attribute_get(sdp,pos,i))!=NULL;i++){
if (keywordcmp(field,attr->a_att_field)==0 && attr->a_att_value!=NULL){
int nb = sscanf(attr->a_att_value,"%i %n",&tmppt,&scanned);
/* the return value may depend on how %n is interpreted by the libc: see manpage*/
if (nb == 1 || nb==2 ){
if (pt==tmppt){
tmp=attr->a_att_value+scanned;
if (strlen(tmp)>0)
return tmp;
}
}else ms_warning("sdp has a strange a= line (%s) nb=%i",attr->a_att_value,nb);
}
}
return NULL;
}
#ifdef FOR_LATER
/* return the value of attr "field" */
static const char *sdp_message_a_attr_value_get(sdp_message_t *sdp,int pos,const char *field)
{
int i;
sdp_attribute_t *attr;
for (i=0;(attr=sdp_message_attribute_get(sdp,pos,i))!=NULL;i++){
if (keywordcmp(field,attr->a_att_field)==0 && attr->a_att_value!=NULL){
return attr->a_att_value;
}
}
return NULL;
}
#endif
static int _sdp_message_get_a_ptime(sdp_message_t *sdp, int mline){
int i,ret;
sdp_attribute_t *attr;
for (i=0;(attr=sdp_message_attribute_get(sdp,mline,i))!=NULL;i++){
if (keywordcmp("ptime",attr->a_att_field)==0){
int nb = sscanf(attr->a_att_value,"%i",&ret);
/* the return value may depend on how %n is interpreted by the libc: see manpage*/
if (nb == 1){
return ret;
}else ms_warning("sdp has a strange a=ptime line (%s) ",attr->a_att_value);
}
}
return 0;
}
static char * _sdp_message_get_a_zrtp_hash(sdp_message_t *sdp, int mline){
int i;
sdp_attribute_t *attr;
for (i=0;(attr=sdp_message_attribute_get(sdp,mline,i))!=NULL;i++){
if (keywordcmp("zrtp-hash",attr->a_att_field)==0){
return attr->a_att_value;
}
}
return NULL;
}
static int _sdp_message_get_mline_dir(sdp_message_t *sdp, int mline){
int i;
sdp_attribute_t *attr;
for (i=0;(attr=sdp_message_attribute_get(sdp,mline,i))!=NULL;i++){
if (keywordcmp("sendrecv",attr->a_att_field)==0){
return SalStreamSendRecv;
}else if (keywordcmp("sendonly",attr->a_att_field)==0){
return SalStreamSendOnly;
}else if (keywordcmp("recvonly",attr->a_att_field)==0){
return SalStreamRecvOnly;
}else if (keywordcmp("inactive",attr->a_att_field)==0){
return SalStreamInactive;
}
}
return SalStreamSendRecv;
}
static sdp_message_t *create_generic_sdp(const SalMediaDescription *desc)
{
sdp_message_t *local;
int inet6;
char sessid[16];
char sessver[16];
const char *rtp_addr = desc->addr;
snprintf(sessid,16,"%i",desc->session_id);
snprintf(sessver,16,"%i",desc->session_ver);
sdp_message_init (&local);
if (strchr(desc->addr,':')!=NULL){
inet6=1;
}else inet6=0;
sdp_message_v_version_set (local, osip_strdup ("0"));
sdp_message_o_origin_set (local, osip_strdup (desc->username),
osip_strdup (sessid), osip_strdup (sessver),
osip_strdup ("IN"), inet6 ? osip_strdup("IP6") : osip_strdup ("IP4"),
osip_strdup (desc->addr));
sdp_message_s_name_set (local, osip_strdup ("Talk"));
/* Do not set the c= line to 0.0.0.0 if there is an ICE session. */
if((desc->ice_ufrag[0] != '\0') || !sal_media_description_has_dir (desc,SalStreamSendOnly))
{
sdp_message_c_connection_add (local, -1,
osip_strdup ("IN"), inet6 ? osip_strdup ("IP6") : osip_strdup ("IP4"),
osip_strdup (rtp_addr), NULL, NULL);
}
else
{
sdp_message_c_connection_add (local, -1,
osip_strdup ("IN"), inet6 ? osip_strdup ("IP6") : osip_strdup ("IP4"),
inet6 ? osip_strdup ("::0") : osip_strdup ("0.0.0.0"), NULL, NULL);
}
sdp_message_t_time_descr_add (local, osip_strdup ("0"), osip_strdup ("0"));
if (desc->bandwidth>0) sdp_message_b_bandwidth_add (local, -1, osip_strdup ("AS"),
int_2char(desc->bandwidth));
if (desc->ice_completed == TRUE) sdp_message_a_attribute_add(local, -1, osip_strdup("nortpproxy"), osip_strdup("yes"));
if (desc->ice_pwd[0] != '\0') sdp_message_a_attribute_add(local, -1, osip_strdup("ice-pwd"), osip_strdup(desc->ice_pwd));
if (desc->ice_ufrag[0] != '\0') sdp_message_a_attribute_add(local, -1, osip_strdup("ice-ufrag"), osip_strdup(desc->ice_ufrag));
return local;
}
static bool_t is_known_rtpmap(const PayloadType *pt){
switch(payload_type_get_number(pt)){
case 0:
case 8:
case 3:
case 34:
return TRUE;
}
return FALSE;
}
static void add_payload(sdp_message_t *msg, int line, const PayloadType *pt, bool_t strip_well_known_rtpmaps)
{
char attr[256];
sdp_message_m_payload_add (msg,line, int_2char (payload_type_get_number(pt)));
if (!strip_well_known_rtpmaps || !is_known_rtpmap(pt)){
if (pt->channels>1)
snprintf (attr,sizeof(attr),"%i %s/%i/%i", payload_type_get_number(pt),
pt->mime_type, pt->clock_rate,pt->channels);
else
snprintf (attr,sizeof(attr),"%i %s/%i", payload_type_get_number(pt),
pt->mime_type, pt->clock_rate);
sdp_message_a_attribute_add (msg, line,
osip_strdup ("rtpmap"), osip_strdup(attr));
}
if (pt->recv_fmtp != NULL)
{
snprintf (attr,sizeof(attr),"%i %s", payload_type_get_number(pt),pt->recv_fmtp);
sdp_message_a_attribute_add (msg, line, osip_strdup ("fmtp"),
osip_strdup(attr));
}
}
static void add_ice_candidates(sdp_message_t *msg, int lineno, const SalStreamDescription *desc)
{
char buffer[1024];
const SalIceCandidate *candidate;
int nb;
int i;
for (i = 0; i < SAL_MEDIA_DESCRIPTION_MAX_ICE_CANDIDATES; i++) {
candidate = &desc->ice_candidates[i];
if ((candidate->addr[0] == '\0') || (candidate->port == 0)) break;
nb = snprintf(buffer, sizeof(buffer), "%s %u UDP %u %s %d typ %s",
candidate->foundation, candidate->componentID, candidate->priority, candidate->addr, candidate->port, candidate->type);
if (nb < 0) {
ms_error("Cannot add ICE candidate attribute!");
return;
}
if (candidate->raddr[0] != '\0') {
nb = snprintf(buffer + nb, sizeof(buffer) - nb, " raddr %s rport %d", candidate->raddr, candidate->rport);
if (nb < 0) {
ms_error("Cannot add ICE candidate attribute!");
return;
}
}
sdp_message_a_attribute_add(msg, lineno, osip_strdup("candidate"), osip_strdup(buffer));
}
}
static void add_ice_remote_candidates(sdp_message_t *msg, int lineno, const SalStreamDescription *desc)
{
char buffer[1024];
char *ptr = buffer;
const SalIceRemoteCandidate *candidate;
int offset = 0;
int i;
buffer[0] = '\0';
for (i = 0; i < SAL_MEDIA_DESCRIPTION_MAX_ICE_REMOTE_CANDIDATES; i++) {
candidate = &desc->ice_remote_candidates[i];
if ((candidate->addr[0] != '\0') && (candidate->port != 0)) {
offset = snprintf(ptr, buffer + sizeof(buffer) - ptr, "%s%d %s %d", (i > 0) ? " " : "", i + 1, candidate->addr, candidate->port);
if (offset < 0) {
ms_error("Cannot add ICE remote-candidates attribute!");
return;
}
ptr += offset;
}
}
if (buffer[0] != '\0') sdp_message_a_attribute_add(msg, lineno, osip_strdup("remote-candidates"), osip_strdup(buffer));
}
static void add_line(sdp_message_t *msg, int lineno, const SalStreamDescription *desc){
const char *mt=NULL;
const MSList *elem;
const char *rtp_addr;
const char *rtcp_addr;
const char *dir="sendrecv";
int rtp_port;
int rtcp_port;
bool_t strip_well_known_rtpmaps;
bool_t different_rtp_and_rtcp_addr;
switch (desc->type) {
case SalAudio:
mt="audio";
break;
case SalVideo:
mt="video";
break;
case SalOther:
mt=desc->typeother;
break;
}
rtp_addr=desc->rtp_addr;
rtcp_addr=desc->rtcp_addr;
rtp_port=desc->rtp_port;
rtcp_port=desc->rtcp_port;
if (desc->proto == SalProtoRtpSavp) {
int i;
sdp_message_m_media_add (msg, osip_strdup (mt),
int_2char (rtp_port), NULL,
osip_strdup ("RTP/SAVP"));
/* add crypto lines */
for(i=0; i<SAL_CRYPTO_ALGO_MAX; i++) {
char buffer[1024];
switch (desc->crypto[i].algo) {
case AES_128_SHA1_80:
snprintf(buffer, 1024, "%d %s inline:%s",
desc->crypto[i].tag, "AES_CM_128_HMAC_SHA1_80", desc->crypto[i].master_key);
sdp_message_a_attribute_add(msg, lineno, osip_strdup("crypto"),
osip_strdup(buffer));
break;
case AES_128_SHA1_32:
snprintf(buffer, 1024, "%d %s inline:%s",
desc->crypto[i].tag, "AES_CM_128_HMAC_SHA1_32", desc->crypto[i].master_key);
sdp_message_a_attribute_add(msg, lineno, osip_strdup("crypto"),
osip_strdup(buffer));
break;
case AES_128_NO_AUTH:
ms_warning("Unsupported crypto suite: AES_128_NO_AUTH");
break;
case NO_CIPHER_SHA1_80:
ms_warning("Unsupported crypto suite: NO_CIPHER_SHA1_80");
break;
default:
i = SAL_CRYPTO_ALGO_MAX;
}
}
} else {
sdp_message_m_media_add (msg, osip_strdup (mt),
int_2char (rtp_port), NULL,
osip_strdup ("RTP/AVP"));
}
/*only add a c= line within the stream description if address are differents*/
if (rtp_addr[0]!='\0' && strcmp(rtp_addr,sdp_message_c_addr_get(msg, -1, 0))!=0){
bool_t inet6;
if (strchr(rtp_addr,':')!=NULL){
inet6=TRUE;
}else inet6=FALSE;
sdp_message_c_connection_add (msg, lineno,
osip_strdup ("IN"), inet6 ? osip_strdup ("IP6") : osip_strdup ("IP4"),
osip_strdup (rtp_addr), NULL, NULL);
}
if (desc->bandwidth>0) sdp_message_b_bandwidth_add (msg, lineno, osip_strdup ("AS"),
int_2char(desc->bandwidth));
if (desc->ptime>0) sdp_message_a_attribute_add(msg,lineno,osip_strdup("ptime"),
int_2char(desc->ptime));
// if the ZRTP hello hash is available, create an a attribute for it
if (desc->zrtp_hello_hash[0])
sdp_message_a_attribute_add(msg,lineno,osip_strdup("zrtp-hash"), osip_strdup(desc->zrtp_hello_hash));
strip_well_known_rtpmaps=ms_list_size(desc->payloads)>5;
if (desc->payloads){
for(elem=desc->payloads;elem!=NULL;elem=elem->next){
add_payload(msg, lineno, (PayloadType*)elem->data,strip_well_known_rtpmaps);
}
}else{
/* to comply with SDP we cannot have an empty payload type number list */
/* as it happens only when mline is declined with a zero port, it does not matter to put whatever codec*/
sdp_message_m_payload_add (msg,lineno, int_2char (0));
}
switch(desc->dir){
case SalStreamSendRecv:
/*dir="sendrecv";*/
dir=NULL;
break;
case SalStreamRecvOnly:
dir="recvonly";
break;
case SalStreamSendOnly:
dir="sendonly";
break;
case SalStreamInactive:
dir="inactive";
break;
}
if (dir) sdp_message_a_attribute_add (msg, lineno, osip_strdup (dir),NULL);
if (rtp_port != 0) {
different_rtp_and_rtcp_addr = (rtcp_addr[0] != '\0') && (strcmp(rtp_addr, rtcp_addr) != 0);
if ((rtcp_port != (rtp_port + 1)) || (different_rtp_and_rtcp_addr == TRUE)) {
if (different_rtp_and_rtcp_addr == TRUE) {
char buffer[1024];
snprintf(buffer, sizeof(buffer), "%u IN IP4 %s", rtcp_port, rtcp_addr);
sdp_message_a_attribute_add(msg, lineno, osip_strdup("rtcp"), osip_strdup(buffer));
} else {
sdp_message_a_attribute_add(msg, lineno, osip_strdup("rtcp"), int_2char(rtcp_port));
}
}
}
if (desc->ice_completed == TRUE) {
sdp_message_a_attribute_add(msg, lineno, osip_strdup("nortpproxy"), osip_strdup("yes"));
}
if (desc->ice_mismatch == TRUE) {
sdp_message_a_attribute_add(msg, lineno, osip_strdup("ice-mismatch"), NULL);
} else {
if (desc->rtp_port != 0) {
if (desc->ice_pwd[0] != '\0') sdp_message_a_attribute_add(msg, lineno, osip_strdup("ice-pwd"), osip_strdup(desc->ice_pwd));
if (desc->ice_ufrag[0] != '\0') sdp_message_a_attribute_add(msg, lineno, osip_strdup("ice-ufrag"), osip_strdup(desc->ice_ufrag));
add_ice_candidates(msg, lineno, desc);
add_ice_remote_candidates(msg, lineno, desc);
}
}
}
sdp_message_t *media_description_to_sdp(const SalMediaDescription *desc){
int i;
sdp_message_t *msg=create_generic_sdp(desc);
for(i=0;i<desc->n_total_streams;++i){
add_line(msg,i,&desc->streams[i]);
}
return msg;
}
static int payload_type_fill_from_rtpmap(PayloadType *pt, const char *rtpmap){
if (rtpmap==NULL){
PayloadType *refpt=rtp_profile_get_payload(&av_profile,payload_type_get_number(pt));
if (refpt){
pt->mime_type=ms_strdup(refpt->mime_type);
pt->clock_rate=refpt->clock_rate;
}else{
ms_error("payload number %i has no rtpmap and is unknown in AV Profile, ignored.",
payload_type_get_number(pt));
return -1;
}
}else{
char *mime=ms_strdup(rtpmap);
char *p=strchr(mime,'/');
if (p){
char *chans;
*p='\0';
p++;
chans=strchr(p,'/');
if (chans){
*chans='\0';
chans++;
pt->channels=atoi(chans);
}else pt->channels=1;
pt->clock_rate=atoi(p);
}
pt->mime_type=mime;
}
return 0;
}
int sdp_to_media_description(sdp_message_t *msg, SalMediaDescription *desc){
int i,j;
const char *mtype,*proto,*rtp_port,*rtp_addr,*number,*zrtp_info;
const char *sess;
sdp_bandwidth_t *sbw=NULL;
sdp_attribute_t *attr;
int nb_ice_candidates;
/* Get session information. */
sess = sdp_message_o_sess_id_get(msg);
if (sess) desc->session_id = strtoul(sess, NULL, 10);
sess = sdp_message_o_sess_version_get(msg);
if (sess) desc->session_ver = strtoul(sess, NULL, 10);
rtp_addr=sdp_message_c_addr_get (msg, -1, 0);
if (rtp_addr)
strncpy(desc->addr,rtp_addr,sizeof(desc->addr));
for(j=0;(sbw=sdp_message_bandwidth_get(msg,-1,j))!=NULL;++j){
if (strcasecmp(sbw->b_bwtype,"AS")==0) desc->bandwidth=atoi(sbw->b_bandwidth);
}
/* Get ICE remote ufrag and remote pwd, and ice_lite flag */
for (i = 0; (i < SAL_MEDIA_DESCRIPTION_MAX_MESSAGE_ATTRIBUTES) && ((attr = sdp_message_attribute_get(msg, -1, i)) != NULL); i++) {
if ((keywordcmp("ice-ufrag", attr->a_att_field) == 0) && (attr->a_att_value != NULL)) {
strncpy(desc->ice_ufrag, attr->a_att_value, sizeof(desc->ice_ufrag));
} else if ((keywordcmp("ice-pwd", attr->a_att_field) == 0) && (attr->a_att_value != NULL)) {
strncpy(desc->ice_pwd, attr->a_att_value, sizeof(desc->ice_pwd));
} else if (keywordcmp("ice-lite", attr->a_att_field) == 0) {
desc->ice_lite = TRUE;
}
}
desc->n_active_streams = 0;
/* for each m= line */
for (i=0; !sdp_message_endof_media (msg, i) && i<SAL_MEDIA_DESCRIPTION_MAX_STREAMS; i++)
{
SalStreamDescription *stream=&desc->streams[i];
nb_ice_candidates = 0;
memset(stream,0,sizeof(*stream));
mtype = sdp_message_m_media_get(msg, i);
proto = sdp_message_m_proto_get (msg, i);
rtp_port = sdp_message_m_port_get(msg, i);
stream->proto=SalProtoUnknown;
if (proto){
if (strcasecmp(proto,"RTP/AVP")==0)
stream->proto=SalProtoRtpAvp;
else if (strcasecmp(proto,"RTP/SAVP")==0){
stream->proto=SalProtoRtpSavp;
}
}
rtp_addr = sdp_message_c_addr_get (msg, i, 0);
if (rtp_addr != NULL)
strncpy(stream->rtp_addr,rtp_addr,sizeof(stream->rtp_addr));
if (rtp_port)
stream->rtp_port=atoi(rtp_port);
if (stream->rtp_port > 0)
desc->n_active_streams++;
// if the SDP contains a zrtp-hash, add it to the StreamDesc
zrtp_info = _sdp_message_get_a_zrtp_hash(msg, i);
if (zrtp_info != NULL)
strncpy(stream->zrtp_hello_hash, zrtp_info, sizeof(stream->zrtp_hello_hash));
stream->ptime=_sdp_message_get_a_ptime(msg,i);
if (strcasecmp("audio", mtype) == 0){
stream->type=SalAudio;
}else if (strcasecmp("video", mtype) == 0){
stream->type=SalVideo;
}else {
stream->type=SalOther;
strncpy(stream->typeother,mtype,sizeof(stream->typeother)-1);
}
for(j=0;(sbw=sdp_message_bandwidth_get(msg,i,j))!=NULL;++j){
if (strcasecmp(sbw->b_bwtype,"AS")==0) stream->bandwidth=atoi(sbw->b_bandwidth);
}
stream->dir=_sdp_message_get_mline_dir(msg,i);
/* for each payload type */
for (j=0;((number=sdp_message_m_payload_get (msg, i,j)) != NULL); j++){
const char *rtpmap,*fmtp;
int ptn=atoi(number);
PayloadType *pt=payload_type_new();
payload_type_set_number(pt,ptn);
/* get the rtpmap associated to this codec, if any */
rtpmap=sdp_message_a_attr_value_get_with_pt(msg, i,ptn,"rtpmap");
if (payload_type_fill_from_rtpmap(pt,rtpmap)==0){
/* get the fmtp, if any */
fmtp=sdp_message_a_attr_value_get_with_pt(msg, i, ptn,"fmtp");
payload_type_set_send_fmtp(pt,fmtp);
stream->payloads=ms_list_append(stream->payloads,pt);
ms_message("Found payload %s/%i fmtp=%s",pt->mime_type,pt->clock_rate,
pt->send_fmtp ? pt->send_fmtp : "");
}
}
/* Get media specific RTCP attribute */
stream->rtcp_port = stream->rtp_port + 1;
snprintf(stream->rtcp_addr, sizeof(stream->rtcp_addr), "%s", stream->rtp_addr);
for (j = 0; ((attr = sdp_message_attribute_get(msg, i, j)) != NULL); j++) {
if ((keywordcmp("rtcp", attr->a_att_field) == 0) && (attr->a_att_value != NULL)) {
char tmp[256];
// added bounds check
int nb = sscanf(attr->a_att_value, "%d IN IP4 %256s", &stream->rtcp_port, tmp);
if (nb == 1) {
/* SDP rtcp attribute only contains the port */
} else if (nb == 2) {
strncpy(stream->rtcp_addr, tmp, sizeof(stream->rtcp_addr));
} else {
ms_warning("sdp has a strange a= line (%s) nb=%i", attr->a_att_value, nb);
}
}
}
/* read crypto lines if any */
if (stream->proto == SalProtoRtpSavp) {
int k, valid_count = 0;
memset(&stream->crypto, 0, sizeof(stream->crypto));
for (k=0;valid_count < SAL_CRYPTO_ALGO_MAX && (attr=sdp_message_attribute_get(msg,i,k))!=NULL;k++){
char tmp[256], tmp2[256];
if (keywordcmp("crypto",attr->a_att_field)==0 && attr->a_att_value!=NULL){
int nb = sscanf(attr->a_att_value, "%d %256s inline:%256s",
&stream->crypto[valid_count].tag,
tmp,
tmp2);
ms_message("Found valid crypto line (tag:%d algo:'%s' key:'%s'",
stream->crypto[valid_count].tag,
tmp,
tmp2);
if (nb == 3) {
if (strcmp(tmp, "AES_CM_128_HMAC_SHA1_80") == 0)
stream->crypto[valid_count].algo = AES_128_SHA1_80;
else if (strcmp(tmp, "AES_CM_128_HMAC_SHA1_32") == 0)
stream->crypto[valid_count].algo = AES_128_SHA1_32;
else {
ms_warning("Failed to parse crypto-algo: '%s'", tmp);
stream->crypto[valid_count].algo = 0;
}
if (stream->crypto[valid_count].algo) {
strncpy(stream->crypto[valid_count].master_key, tmp2, 41);
stream->crypto[valid_count].master_key[40] = '\0';
ms_message("Found valid crypto line (tag:%d algo:'%s' key:'%s'",
stream->crypto[valid_count].tag,
tmp,
stream->crypto[valid_count].master_key);
valid_count++;
}
} else {
ms_warning("sdp has a strange a= line (%s) nb=%i",attr->a_att_value,nb);
}
}
}
ms_message("Found: %d valid crypto lines", valid_count);
}
/* Get ICE candidate attributes if any */
for (j = 0; (attr = sdp_message_attribute_get(msg, i, j)) != NULL; j++) {
if ((keywordcmp("candidate", attr->a_att_field) == 0) && (attr->a_att_value != NULL)) {
SalIceCandidate *candidate = &stream->ice_candidates[nb_ice_candidates];
int nb = sscanf(attr->a_att_value, "%s %u UDP %u %s %d typ %s raddr %s rport %d",
candidate->foundation, &candidate->componentID, &candidate->priority, candidate->addr, &candidate->port,
candidate->type, candidate->raddr, &candidate->rport);
if ((nb == 6) || (nb == 8)) nb_ice_candidates++;
else memset(candidate, 0, sizeof(*candidate));
} else if ((keywordcmp("remote-candidates", attr->a_att_field) == 0) && (attr->a_att_value != NULL)) {
SalIceRemoteCandidate candidate;
unsigned int componentID;
int offset;
char *ptr = attr->a_att_value;
while (3 == sscanf(ptr, "%u %s %u%n", &componentID, candidate.addr, &candidate.port, &offset)) {
if ((componentID > 0) && (componentID <= SAL_MEDIA_DESCRIPTION_MAX_ICE_REMOTE_CANDIDATES)) {
SalIceRemoteCandidate *remote_candidate = &stream->ice_remote_candidates[componentID - 1];
strncpy(remote_candidate->addr, candidate.addr, sizeof(remote_candidate->addr));
remote_candidate->port = candidate.port;
}
ptr += offset;
if (ptr[offset] == ' ') ptr += 1;
}
} else if ((keywordcmp("ice-ufrag", attr->a_att_field) == 0) && (attr->a_att_value != NULL)) {
strncpy(stream->ice_ufrag, attr->a_att_value, sizeof(stream->ice_ufrag));
} else if ((keywordcmp("ice-pwd", attr->a_att_field) == 0) && (attr->a_att_value != NULL)) {
strncpy(stream->ice_pwd, attr->a_att_value, sizeof(stream->ice_pwd));
} else if (keywordcmp("ice-mismatch", attr->a_att_field) == 0) {
stream->ice_mismatch = TRUE;
}
}
}
desc->n_total_streams=i;
return 0;
}
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