Merge pull request 'LINXD-2842-log-protocol-change' (#36) from LINXD-2842-log-protocol-change into develop

Reviewed-on: #36
Reviewed-by: Cristi Ene <cristi.ene@safemobile.com>

.env

@@ -8,3 +8,4 @@ SERVER_KEY="./server/ssl/key.pem"
 ENABLE_UDP=true
 ENABLE_TCP=true
 PREFER_UDP=true
+PREFER_TCP=false

app.js

@@ -12,6 +12,11 @@ try {
   console.log('https support is disabled!');
 }
 const mediasoup = require('mediasoup');
+const isUdpEnabled = process.env.ENABLE_UDP === 'true';
+const isTcpEnabled = process.env.ENABLE_TCP === 'true';
+const isUdpPreferred = process.env.PREFER_UDP === 'true';
+const isTcpPreferred = process.env.PREFER_TCP === 'true';
+let currentConnectionType = isUdpPreferred ? 'udp' : 'tcp';
 
 let worker;
 /**
@@ -555,14 +560,33 @@ const createWebRtcTransportLayer = async (callId, callback) => {
           announcedIp: process.env.ANNOUNCED_IP, // Announced IPv4 or IPv6 (useful when running mediasoup behind NAT with private IP).
         },
       ],
-      enableUdp: process.env.ENABLE_UDP === 'true',
+      enableUdp: isUdpEnabled,
-      enableTcp: process.env.ENABLE_TCP === 'true',
+      enableTcp: isTcpEnabled,
-      preferUdp: process.env.PREFER_UDP === 'true',
+      preferUdp: isUdpPreferred,
+      preferTcp: isTcpPreferred,
+      iceConsentTimeout: 3
     };
 
     // https://mediasoup.org/documentation/v3/mediasoup/api/#router-createWebRtcTransport
     let transport = await videoCalls[callId].router.createWebRtcTransport(webRtcTransport_options);
 
+    // `iceselectedtuplechange`: Fires when ICE switches transport (e.g., UDP → TCP).
+    transport.on('iceselectedtuplechange', (selectedTuple) => {
+      const { protocol } = selectedTuple;
+      if (currentConnectionType !== protocol) {
+        console.warn(`⚠️ ${currentConnectionType.toUpperCase()} blocked! Switching to ${protocol.toUpperCase()} for callId: ${callId}`);
+        currentConnectionType = protocol;
+      }
+    });
+
+    // `icestatechange`: Fires when ICE connection state changes (e.g., new, connected, failed).
+    transport.on('icestatechange', (iceState) => {
+      console.log(`[ICE STATE CHANGE] callId: ${callId} | State: ${iceState}`);
+      if (iceState === 'failed' || iceState === 'disconnected') {
+        console.warn(`⚠️ ICE failure detected for callId: ${callId}! Possible UDP blockage.`);
+      }
+    });
+
     // Handler for when DTLS(Datagram Transport Layer Security) changes
     transport.on('dtlsstatechange', (dtlsState) => {
       console.log(`transport | dtlsstatechange | calldId ${callId} | dtlsState ${dtlsState}`);

package.json

@@ -16,7 +16,7 @@
     "@types/express": "^4.17.13",
     "dotenv": "^16.0.1",
     "express": "^4.18.1",
-    "mediasoup": "^3.10.4",
+    "mediasoup": "^3.15.5",
     "mediasoup-client": "^3.6.54",
     "parcel": "^2.7.0",
     "socket.io": "^2.0.3",