/* Send dummy STUN packet to open NAT ports ASAP. */
static void send_stun_packet(SenderData *d, bool_t enable_rtp, bool_t enable_rtcp)
{
MSStunMessage *msg;
mblk_t *mp;
RtpSession *s = d->session;
char *buf = NULL;
int len;
if (!d->stun_enabled) return;
if (ms_is_multicast_addr((const struct sockaddr *)&s->rtcp.gs.loc_addr)) {
ms_debug("Stun packet not sent for session [%p] because of multicast",s);
return;
}
msg = ms_stun_binding_request_create();
len = ms_stun_message_encode(msg, &buf);
if (len > 0) {
if (enable_rtp) {
mp = allocb(len, BPRI_MED);
memcpy(mp->b_wptr, buf, len);
mp->b_wptr += len;
ms_message("Stun packet sent for session [%p]",s);
rtp_session_sendm_with_ts(s, mp, 0);
}
if (enable_rtcp) {
mp = allocb(len, BPRI_MED);
memcpy(mp->b_wptr, buf, len);
mp->b_wptr += len;
ms_message("Stun packet sent on rtcp for session [%p]",s);
rtp_session_rtcp_sendm_raw(s,mp);
}
}
if (buf != NULL) ms_free(buf);
ms_stun_message_destroy(msg);
}
bool_t ms_is_multicast(const char *address) {
bool_t ret = FALSE;
struct addrinfo hints, *res0;
int err;
memset(&hints, 0, sizeof(hints));
hints.ai_family = PF_UNSPEC;
hints.ai_socktype = SOCK_DGRAM;
hints.ai_flags = AI_NUMERICHOST;
err = getaddrinfo(address,"8000", &hints, &res0);
if (err != 0) {
ms_warning("ms_is_multicast(%s): %s", address, gai_strerror(err));
return FALSE;
}
ret = ms_is_multicast_addr(res0->ai_addr);
freeaddrinfo(res0);
return ret;
}
/* Send dummy STUN packet to open NAT ports ASAP. */
static void send_stun_packet(RtpSession *s)
{
StunMessage msg;
mblk_t *mp;
char buf[STUN_MAX_MESSAGE_SIZE];
int len = STUN_MAX_MESSAGE_SIZE;
if (ms_is_multicast_addr((const struct sockaddr *)&s->rtcp.gs.loc_addr)) {
ms_debug("Stun packet not sent for session [%p] because of multicast",s);
return;
}
memset(&msg, 0, sizeof(StunMessage));
stunBuildReqSimple(&msg, NULL, FALSE, FALSE, 1);
len = stunEncodeMessage(&msg, buf, len, NULL);
if (len > 0) {
mp = allocb(len, BPRI_MED);
memcpy(mp->b_wptr, buf, len);
mp->b_wptr += len;
ms_message("Stun packet sent for session [%p]",s);
rtp_session_sendm_with_ts(s, mp, 0);
}
}
