Fix external IP discovery. fix LeaveRequest during server disconnect (#72)

pkg/config/ip.go

@@ -13,7 +13,11 @@ import (
 
 func (conf *Config) determineIP() (string, error) {
 	if conf.RTC.UseExternalIP {
-		ip, err := GetExternalIP(conf.RTC.StunServers)
+		stunServers := conf.RTC.StunServers
+		if len(stunServers) == 0 {
+			stunServers = DEFAULT_STUN_SERVERS
+		}
+		ip, err := GetExternalIP(stunServers)
 		if err == nil {
 			return ip, nil
 		} else {

pkg/service/roommanager.go

@@ -255,8 +255,8 @@ func (r *RoomManager) StartSession(roomName string, pi routing.ParticipantInit,
 		}
 	} else if pi.Reconnect {
 		// send leave request if participant is trying to reconnect but missing from the room
-		if err = responseSink.WriteMessage(&livekit.SignalRequest{
-			Message: &livekit.SignalRequest_Leave{
+		if err = responseSink.WriteMessage(&livekit.SignalResponse{
+			Message: &livekit.SignalResponse_Leave{
 				Leave: &livekit.LeaveRequest{
 					CanReconnect: true,
 				},