add new function to init an empty switch_sockaddr_t to avoid an unnecessary dns lookup on 0.0.0.0

src/include/switch_apr.h

@@ -1110,6 +1110,8 @@ SWITCH_DECLARE(int) switch_sockaddr_equal(const switch_sockaddr_t *sa1, const sw
 SWITCH_DECLARE(switch_status_t) switch_sockaddr_info_get(switch_sockaddr_t ** sa, const char *hostname,
 														 int32_t family, switch_port_t port, int32_t flags, switch_memory_pool_t *pool);
 
+SWITCH_DECLARE(switch_status_t) switch_sockaddr_create(switch_sockaddr_t **sa, switch_memory_pool_t *pool);
+
 /**
  * Send data over a network.
  * @param sock The socket to send the data over.

src/switch_apr.c

@@ -729,6 +729,18 @@ SWITCH_DECLARE(switch_status_t) switch_socket_recv(switch_socket_t *sock, char *
 	return apr_socket_recv(sock, buf, len);
 }
 
+SWITCH_DECLARE(switch_status_t) switch_sockaddr_create(switch_sockaddr_t **sa, switch_memory_pool_t *pool)
+{
+	switch_sockaddr_t *new_sa;
+
+	new_sa = apr_pcalloc(pool, sizeof(apr_sockaddr_t));
+	switch_assert(new_sa);
+	new_sa->pool = pool;
+	memset(new_sa, 0, sizeof(new_sa));
+	*sa = new_sa;
+	return SWITCH_STATUS_SUCCESS;
+}
+
 SWITCH_DECLARE(switch_status_t) switch_sockaddr_info_get(switch_sockaddr_t ** sa, const char *hostname, int32_t family,
 														 switch_port_t port, int32_t flags, switch_memory_pool_t *pool)
 {

src/switch_rtp.c

@@ -1367,9 +1367,10 @@ SWITCH_DECLARE(switch_status_t) switch_rtp_create(switch_rtp_t **new_rtp_session
 	switch_rtp_set_flag(rtp_session, flags);
 
 	/* for from address on recvfrom calls */
-	switch_sockaddr_info_get(&rtp_session->from_addr, NULL, SWITCH_UNSPEC, 0, 0, pool);
+	switch_sockaddr_create(&rtp_session->from_addr, pool);
+
 	if (switch_test_flag(rtp_session, SWITCH_RTP_FLAG_ENABLE_RTCP)) {
-		switch_sockaddr_info_get(&rtp_session->rtcp_from_addr, NULL, SWITCH_UNSPEC, 0, 0, pool);
+		switch_sockaddr_create(&rtp_session->rtcp_from_addr, pool);
 	}
 	rtp_session->seq = (uint16_t) rand();
 	rtp_session->ssrc = (uint32_t) ((intptr_t) rtp_session + (uint32_t) switch_epoch_time_now(NULL));