static void stun_response_handler(int err, uint16_t scode, const char *reason,
const struct stun_msg *msg, void *arg)
{
struct sip_udpconn *uc = arg;
struct stun_attr *attr;
(void)reason;
if (err || scode) {
err = err ? err : EPROTO;
goto out;
}
attr = stun_msg_attr(msg, STUN_ATTR_XOR_MAPPED_ADDR);
if (!attr) {
attr = stun_msg_attr(msg, STUN_ATTR_MAPPED_ADDR);
if (!attr) {
err = EPROTO;
goto out;
}
}
if (!sa_isset(&uc->maddr, SA_ALL)) {
uc->maddr = attr->v.sa;
}
else if (!sa_cmp(&uc->maddr, &attr->v.sa, SA_ALL)) {
err = ENOTCONN;
goto out;
}
out:
if (err) {
udpconn_close(uc, err);
mem_deref(uc);
}
else {
tmr_start(&uc->tmr_ka, sip_keepalive_wait(uc->ka_interval),
udpconn_keepalive_handler, uc);
}
}
static void conn_keepalive_handler(void *arg)
{
struct sip_conn *conn = arg;
struct mbuf mb;
int err;
mb.buf = crlfcrlf;
mb.size = sizeof(crlfcrlf);
mb.pos = 0;
mb.end = 4;
err = tcp_send(conn->tc, &mb);
if (err) {
conn_close(conn, err);
mem_deref(conn);
return;
}
tmr_start(&conn->tmr, TCP_KEEPALIVE_TIMEOUT * 1000,
conn_tmr_handler, conn);
tmr_start(&conn->tmr_ka, sip_keepalive_wait(conn->ka_interval),
conn_keepalive_handler, conn);
}
int sip_keepalive_tcp(struct sip_keepalive *ka, struct sip_conn *conn,
uint32_t interval)
{
if (!ka || !conn)
return EINVAL;
if (!conn->tc || !conn->established)
return ENOTCONN;
list_append(&conn->kal, &ka->le, ka);
if (!tmr_isrunning(&conn->tmr_ka)) {
interval = MAX(interval ? interval : TCP_KEEPALIVE_INTVAL,
TCP_KEEPALIVE_TIMEOUT * 2);
conn->ka_interval = interval;
tmr_start(&conn->tmr_ka, sip_keepalive_wait(conn->ka_interval),
conn_keepalive_handler, conn);
}
return 0;
}
