static int stream_sock_alloc(struct stream *s, int af)
{
struct sa laddr;
int tos, err;
if (!s)
return EINVAL;
/* we listen on all interfaces */
sa_init(&laddr, af);
err = rtp_listen(&s->rtp, IPPROTO_UDP, &laddr,
s->cfg.rtp_ports.min, s->cfg.rtp_ports.max,
s->rtcp, rtp_recv, rtcp_handler, s);
if (err) {
warning("stream: rtp_listen failed: af=%s ports=%u-%u"
" (%m)\n", net_af2name(af),
s->cfg.rtp_ports.min, s->cfg.rtp_ports.max, err);
return err;
}
tos = s->cfg.rtp_tos;
(void)udp_setsockopt(rtp_sock(s->rtp), IPPROTO_IP, IP_TOS,
&tos, sizeof(tos));
(void)udp_setsockopt(rtcp_sock(s->rtp), IPPROTO_IP, IP_TOS,
&tos, sizeof(tos));
udp_rxsz_set(rtp_sock(s->rtp), RTP_RECV_SIZE);
return 0;
}
static int stream_sock_alloc(struct stream *s, int af)
{
struct sa laddr;
int tos, err;
if (!s)
return EINVAL;
/* we listen on all interfaces */
sa_init(&laddr, sa_af(net_laddr_af(af)));
err = rtp_listen(&s->rtp, IPPROTO_UDP, &laddr,
config.avt.rtp_ports.min, config.avt.rtp_ports.max,
s->rtcp, rtp_recv, rtcp_handler, s);
if (err)
return err;
tos = config.avt.rtp_tos;
(void)udp_setsockopt(rtp_sock(s->rtp), IPPROTO_IP, IP_TOS,
&tos, sizeof(tos));
(void)udp_setsockopt(rtcp_sock(s->rtp), IPPROTO_IP, IP_TOS,
&tos, sizeof(tos));
udp_rxsz_set(rtp_sock(s->rtp), RTP_RECV_SIZE);
return 0;
}
void stream_update(struct stream *s)
{
const struct sdp_format *fmt;
int err = 0;
if (!s)
return;
fmt = sdp_media_rformat(s->sdp, NULL);
s->pt_enc = fmt ? fmt->pt : -1;
if (sdp_media_has_media(s->sdp))
stream_remote_set(s);
if (s->menc && s->menc->mediah) {
err = s->menc->mediah(&s->mes, s->mencs, s->rtp,
IPPROTO_UDP,
rtp_sock(s->rtp),
s->rtcp ? rtcp_sock(s->rtp) : NULL,
s->sdp);
if (err) {
warning("stream: mediaenc update: %m\n", err);
}
}
}
void stream_update(struct stream *s, const char *cname)
{
const struct sdp_format *fmt;
int err = 0;
if (!s)
return;
fmt = sdp_media_rformat(s->sdp, NULL);
s->pt_enc = fmt ? fmt->pt : -1;
if (stream_has_media(s))
stream_remote_set(s, cname);
if (s->menc && s->menc->mediah) {
err = s->menc->mediah(&s->mes, s->mencs, IPPROTO_UDP,
rtp_sock(s->rtp),
s->rtcp ? rtcp_sock(s->rtp) : NULL,
s->sdp);
if (err) {
DEBUG_WARNING("mediaenc update: %m\n", err);
}
}
}
int stream_alloc(struct stream **sp, const struct config_avt *cfg,
struct call *call, struct sdp_session *sdp_sess,
const char *name, int label,
const struct mnat *mnat, struct mnat_sess *mnat_sess,
const struct menc *menc, struct menc_sess *menc_sess,
const char *cname,
stream_rtp_h *rtph, stream_rtcp_h *rtcph, void *arg)
{
struct stream *s;
int err;
if (!sp || !cfg || !call || !rtph)
return EINVAL;
s = mem_zalloc(sizeof(*s), stream_destructor);
if (!s)
return ENOMEM;
s->cfg = *cfg;
s->call = call;
s->rtph = rtph;
s->rtcph = rtcph;
s->arg = arg;
s->pseq = -1;
s->rtcp = s->cfg.rtcp_enable;
err = stream_sock_alloc(s, call_af(call));
if (err) {
warning("stream: failed to create socket for media '%s'"
" (%m)\n", name, err);
goto out;
}
err = str_dup(&s->cname, cname);
if (err)
goto out;
/* Jitter buffer */
if (cfg->jbuf_del.min && cfg->jbuf_del.max) {
err = jbuf_alloc(&s->jbuf, cfg->jbuf_del.min,
cfg->jbuf_del.max);
if (err)
goto out;
}
err = sdp_media_add(&s->sdp, sdp_sess, name,
sa_port(rtp_local(s->rtp)),
(menc && menc->sdp_proto) ? menc->sdp_proto :
sdp_proto_rtpavp);
if (err)
goto out;
if (label) {
err |= sdp_media_set_lattr(s->sdp, true,
"label", "%d", label);
}
/* RFC 5506 */
if (s->rtcp)
err |= sdp_media_set_lattr(s->sdp, true, "rtcp-rsize", NULL);
/* RFC 5576 */
if (s->rtcp) {
err |= sdp_media_set_lattr(s->sdp, true,
"ssrc", "%u cname:%s",
rtp_sess_ssrc(s->rtp), cname);
}
/* RFC 5761 */
if (cfg->rtcp_mux)
err |= sdp_media_set_lattr(s->sdp, true, "rtcp-mux", NULL);
if (err)
goto out;
if (mnat) {
err = mnat->mediah(&s->mns, mnat_sess, IPPROTO_UDP,
rtp_sock(s->rtp),
s->rtcp ? rtcp_sock(s->rtp) : NULL,
s->sdp);
if (err)
goto out;
}
if (menc) {
s->menc = menc;
s->mencs = mem_ref(menc_sess);
err = menc->mediah(&s->mes, menc_sess,
s->rtp,
IPPROTO_UDP,
rtp_sock(s->rtp),
s->rtcp ? rtcp_sock(s->rtp) : NULL,
s->sdp);
if (err)
goto out;
}
if (err)
goto out;
s->pt_enc = -1;
metric_init(&s->metric_tx);
metric_init(&s->metric_rx);
list_append(call_streaml(call), &s->le, s);
out:
if (err)
mem_deref(s);
else
*sp = s;
return err;
}
int stream_alloc(struct stream **sp, struct call *call,
struct sdp_session *sdp_sess,
const char *name, int label,
const struct mnat *mnat, struct mnat_sess *mnat_sess,
const struct menc *menc, struct menc_sess *menc_sess,
stream_rtp_h *rtph, stream_rtcp_h *rtcph, void *arg)
{
struct stream *s;
int err;
if (!sp || !call || !rtph)
return EINVAL;
s = mem_zalloc(sizeof(*s), stream_destructor);
if (!s)
return ENOMEM;
MAGIC_INIT(s);
tmr_init(&s->tmr_stats);
s->call = call;
if (!str_casecmp(name, "audio"))
s->type = STREAM_AUDIO;
else if (!str_casecmp(name, "video"))
s->type = STREAM_VIDEO;
else
s->type = STREAM_UNKNOWN;
s->rtph = rtph;
s->rtcph = rtcph;
s->arg = arg;
s->pseq = -1;
s->rtcp = config.avt.rtcp_enable;
err = stream_sock_alloc(s, call_af(call));
if (err)
goto out;
/* Jitter buffer */
if (config.avt.jbuf_del.min && config.avt.jbuf_del.max) {
err = jbuf_alloc(&s->jbuf, config.avt.jbuf_del.min,
config.avt.jbuf_del.max);
if (err)
goto out;
}
err = sdp_media_add(&s->sdp, sdp_sess, name,
sa_port(rtp_local(s->rtp)),
(menc && menc->sdp_proto) ? menc->sdp_proto :
sdp_proto_rtpavp);
if (err)
goto out;
if (label) {
err |= sdp_media_set_lattr(s->sdp, true,
"label", "%d", label);
}
/* RFC 5761 */
if (config.avt.rtcp_mux)
err |= sdp_media_set_lattr(s->sdp, true, "rtcp-mux", NULL);
if (mnat) {
err |= mnat->mediah(&s->mns, mnat_sess, IPPROTO_UDP,
rtp_sock(s->rtp),
(s->rtcp && !config.avt.rtcp_mux)
? rtcp_sock(s->rtp) : NULL,
s->sdp);
}
if (menc) {
s->menc = menc;
s->mencs = mem_ref(menc_sess);
err |= menc->mediah(&s->mes, menc_sess, IPPROTO_UDP,
rtp_sock(s->rtp),
s->rtcp ? rtcp_sock(s->rtp) : NULL,
s->sdp);
}
if (err)
goto out;
s->pt_enc = -1;
list_append(call_streaml(call), &s->le, s);
out:
if (err)
mem_deref(s);
else
*sp = s;
return err;
}