hot fix: readd locks

machinery/src/cloud/Cloud.go

@@ -554,10 +554,12 @@ func HandleLiveStreamHD(livestreamCursor *pubsub.QueueCursor, configuration *mod
 				for handshake := range communication.HandleLiveHDHandshake {
 					log.Log.Info("HandleLiveStreamHD: setting up a peer connection.")
 					key := config.Key + "/" + handshake.SessionID
+					webrtc.CandidatesMutex.Lock()
 					_, ok := webrtc.CandidateArrays[key]
 					if !ok {
 						webrtc.CandidateArrays[key] = make(chan string)
 					}
+					webrtc.CandidatesMutex.Unlock()
 					webrtc.InitializeWebRTCConnection(configuration, communication, mqttClient, videoTrack, audioTrack, handshake, webrtc.CandidateArrays[key])
 
 				}

machinery/src/webrtc/main.go

@@ -179,6 +179,9 @@ func InitializeWebRTCConnection(configuration *models.Configuration, communicati
 				panic(err)
 			}
 
+			// When an ICE candidate is available send to the other Pion instance
+			// the other Pion instance will add this candidate by calling AddICECandidate
+			var candidatesMux sync.Mutex
 			// When an ICE candidate is available send to the other peer using the signaling server (MQTT).
 			// The other peer will add this candidate by calling AddICECandidate
 			peerConnection.OnICECandidate(func(candidate *pionWebRTC.ICECandidate) {
@@ -186,6 +189,9 @@ func InitializeWebRTCConnection(configuration *models.Configuration, communicati
 					return
 				}
 
+				candidatesMux.Lock()
+				defer candidatesMux.Unlock()
+
 				//  Create a config map
 				valueMap := make(map[string]interface{})
 				candateJSON := candidate.ToJSON()
@@ -208,7 +214,9 @@ func InitializeWebRTCConnection(configuration *models.Configuration, communicati
 				}
 				payload, err := models.PackageMQTTMessage(configuration, message)
 				if err == nil {
-					mqttClient.Publish("kerberos/hub/"+hubKey, 0, false, payload)
+					log.Log.Info("InitializeWebRTCConnection:" + string(candateBinary))
+					token := mqttClient.Publish("kerberos/hub/"+hubKey, 0, false, payload)
+					token.Wait()
 				} else {
 					log.Log.Info("HandleRequestConfig: something went wrong while sending acknowledge config to hub: " + string(payload))
 				}
@@ -233,7 +241,8 @@ func InitializeWebRTCConnection(configuration *models.Configuration, communicati
 				}
 				payload, err := models.PackageMQTTMessage(configuration, message)
 				if err == nil {
-					mqttClient.Publish("kerberos/hub/"+hubKey, 0, false, payload)
+					token := mqttClient.Publish("kerberos/hub/"+hubKey, 0, false, payload)
+					token.Wait()
 				} else {
 					log.Log.Info("HandleRequestConfig: something went wrong while sending acknowledge config to hub: " + string(payload))
 				}