static void insert_candidate(struct sdp_chopper *chop, struct packet_stream *ps, unsigned int component,
unsigned int type_pref, unsigned int local_pref, enum ice_candidate_type type,
struct interface_address *ifa)
{
unsigned long priority;
priority = ice_priority_pref(type_pref, local_pref, component);
chopper_append_c(chop, "a=candidate:");
chopper_append_str(chop, &ifa->ice_foundation);
chopper_append_printf(chop, " %u UDP %lu ", component, priority);
insert_ice_address(chop, ps, ifa);
chopper_append_c(chop, " typ ");
chopper_append_c(chop, ice_candidate_type_str(type));
/* raddr and rport are required for non-host candidates: rfc5245 section-15.1 */
if(type != ICT_HOST)
insert_raddr_rport(chop, ps, ifa);
chopper_append_c(chop, "\r\n");
}
static void insert_candidate(struct sdp_chopper *chop, struct stream_fd *sfd,
unsigned int type_pref, unsigned int local_pref, enum ice_candidate_type type)
{
unsigned long priority;
struct packet_stream *ps = sfd->stream;
const struct local_intf *ifa = sfd->local_intf;
if (local_pref == -1)
local_pref = ifa->unique_id;
priority = ice_priority_pref(type_pref, local_pref, ps->component);
chopper_append_c(chop, "a=candidate:");
chopper_append_str(chop, &ifa->ice_foundation);
chopper_append_printf(chop, " %u UDP %lu ", ps->component, priority);
insert_ice_address(chop, sfd);
chopper_append_c(chop, " typ ");
chopper_append_c(chop, ice_candidate_type_str(type));
/* raddr and rport are required for non-host candidates: rfc5245 section-15.1 */
if(type != ICT_HOST)
insert_raddr_rport(chop, ps, ifa);
chopper_append_c(chop, "\r\n");
}
/* called with call->master_lock held in W */
int sdp_replace(struct sdp_chopper *chop, GQueue *sessions, struct call_monologue *monologue,
struct sdp_ng_flags *flags)
{
struct sdp_session *session;
struct sdp_media *sdp_media;
GList *l, *k, *m, *j;
int media_index, sess_conn;
struct call_media *call_media;
struct packet_stream *ps, *ps_rtcp;
m = monologue->medias.head;
for (l = sessions->head; l; l = l->next) {
session = l->data;
if (!m)
goto error;
call_media = m->data;
if (call_media->index != 1)
goto error;
j = call_media->streams.head;
if (!j)
goto error;
ps = j->data;
sess_conn = 0;
if (flags->replace_sess_conn)
sess_conn = 1;
else {
for (k = session->media_streams.head; k; k = k->next) {
sdp_media = k->data;
if (!sdp_media->connection.parsed) {
sess_conn = 1;
break;
}
}
}
if (session->origin.parsed && flags->replace_origin &&
!flags->ice_force_relay) {
if (replace_network_address(chop, &session->origin.address, ps, flags))
goto error;
}
if (session->connection.parsed && sess_conn &&
!flags->ice_force_relay) {
if (replace_network_address(chop, &session->connection.address, ps, flags))
goto error;
}
if (!MEDIA_ISSET(call_media, PASSTHRU)) {
if (process_session_attributes(chop, &session->attributes, flags))
goto error;
}
media_index = 1;
for (k = session->media_streams.head; k; k = k->next) {
sdp_media = k->data;
if (!m)
goto error;
call_media = m->data;
if (call_media->index != media_index)
goto error;
j = call_media->streams.head;
if (!j)
goto error;
ps = j->data;
if (!flags->ice_force_relay) {
if (replace_media_port(chop, sdp_media, ps))
goto error;
if (replace_consecutive_port_count(chop, sdp_media, ps, j))
goto error;
if (replace_transport_protocol(chop, sdp_media, call_media))
goto error;
if (sdp_media->connection.parsed) {
if (replace_network_address(chop, &sdp_media->connection.address, ps, flags))
goto error;
}
}
if (process_media_attributes(chop, sdp_media, flags, call_media))
goto error;
copy_up_to_end_of(chop, &sdp_media->s);
ps_rtcp = NULL;
if (ps->rtcp_sibling) {
ps_rtcp = ps->rtcp_sibling;
j = j->next;
if (!j)
goto error;
assert(j->data == ps_rtcp);
}
if (!sdp_media->port_num || !ps->sfd)
goto next;
if (MEDIA_ARESET2(call_media, SEND, RECV))
chopper_append_c(chop, "a=sendrecv\r\n");
else if (MEDIA_ISSET(call_media, SEND))
chopper_append_c(chop, "a=sendonly\r\n");
else if (MEDIA_ISSET(call_media, RECV))
chopper_append_c(chop, "a=recvonly\r\n");
else
chopper_append_c(chop, "a=inactive\r\n");
if (call_media->protocol && call_media->protocol->rtp) {
if (MEDIA_ISSET(call_media, RTCP_MUX) && flags->opmode == OP_ANSWER) {
chopper_append_c(chop, "a=rtcp:");
chopper_append_printf(chop, "%hu", ps->sfd->fd.localport);
chopper_append_c(chop, "\r\na=rtcp-mux\r\n");
ps_rtcp = NULL;
}
else if (ps_rtcp && !flags->ice_force_relay) {
chopper_append_c(chop, "a=rtcp:");
chopper_append_printf(chop, "%hu", ps_rtcp->sfd->fd.localport);
if (!MEDIA_ISSET(call_media, RTCP_MUX))
chopper_append_c(chop, "\r\n");
else
chopper_append_c(chop, "\r\na=rtcp-mux\r\n");
}
}
else
ps_rtcp = NULL;
insert_crypto(call_media, chop);
insert_dtls(call_media, chop);
if (MEDIA_ISSET(call_media, ICE) && call_media->ice_agent) {
chopper_append_c(chop, "a=ice-ufrag:");
chopper_append_str(chop, &call_media->ice_agent->ufrag[1]);
chopper_append_c(chop, "\r\na=ice-pwd:");
chopper_append_str(chop, &call_media->ice_agent->pwd[1]);
chopper_append_c(chop, "\r\n");
}
if (!flags->ice_remove)
insert_candidates(chop, ps, ps_rtcp, flags, sdp_media);
next:
media_index++;
m = m->next;
}
}
copy_remainder(chop);
return 0;
error:
ilog(LOG_ERROR, "Error rewriting SDP");
return -1;
}
