fix: udp listen connection should be based on remote

emiago · Nov 25, 2024 · 4fd9a96 · 4fd9a96
1 parent 0cf3260
commit 4fd9a96
Showing 1 changed file with 8 additions and 1 deletion.
diff --git a/sip/transport_udp.go b/sip/transport_udp.go
@@ -99,7 +99,14 @@ func (t *transportUDP) CreateConnection(ctx context.Context, laddr Addr, raddr A
 func (t *transportUDP) createConnection(ctx context.Context, laddr Addr, raddr Addr, handler MessageHandler) (Connection, error) {
 	laddrStr := laddr.String()
 	lc := &net.ListenConfig{}
-	udpconn, err := lc.ListenPacket(ctx, "udp", laddrStr)
+
+	protocol := "udp"
+	if laddr.IP == nil && raddr.IP.To4() != nil {
+		// Use IPV4 if remote is same
+		protocol = "udp4"
+	}
+
+	udpconn, err := lc.ListenPacket(ctx, protocol, laddrStr)
 	if err != nil {
 		return nil, err
 	}