static void timeout(void *arg)
{
struct icem_comp *comp = arg;
struct candpair *cp;
tmr_start(&comp->tmr_ka, ICE_DEFAULT_Tr * 1000 + rand_u16() % 1000,
timeout, comp);
/* find selected candidate-pair */
cp = comp->cp_sel;
if (!cp)
return;
(void)stun_indication(comp->icem->proto, comp->sock, &cp->rcand->addr,
(cp->lcand->type == CAND_TYPE_RELAY) ? 4 : 0,
STUN_METHOD_BINDING, NULL, 0, true, 0);
}
/* Receive packet on the "relayed" address -- relay to the client */
static void relay_udp_recv(const struct sa *src, struct mbuf *mb, void *arg)
{
struct turnserver *turn = arg;
struct channel *chan;
int err = 0;
++turn->n_recv;
chan = find_channel_peer(turn, src);
if (chan) {
uint16_t len = mbuf_get_left(mb);
size_t start;
if (mb->pos < 4) {
DEBUG_WARNING("relay_udp_recv: mb pos < 4\n");
return;
}
mb->pos -= 4;
start = mb->pos;
(void)mbuf_write_u16(mb, htons(chan->nr));
(void)mbuf_write_u16(mb, htons(len));
mb->pos = start;
err = udp_send(turn->us, &turn->cli, mb);
}
else {
err = stun_indication(IPPROTO_UDP, turn->us,
&turn->cli, 0, STUN_METHOD_DATA,
NULL, 0, false, 2,
STUN_ATTR_XOR_PEER_ADDR, src,
STUN_ATTR_DATA, mb);
}
if (err) {
DEBUG_WARNING("relay_udp_recv: error %m\n", err);
}
}
