Use REST eduTurn

server/config/config.example.js

@@ -32,6 +32,19 @@ module.exports =
 		}
 	},
 	*/
+	// URI and key for requesting geoip-based TURN server closest to the client
+	turnAPIKey        : 'examplekey',
+	turnAPIURI        : 'https://example.com/api/turn',
+	// Backup turnservers if REST fails or is not configured
+	backupTurnServers : [
+		{
+			urls : [
+				'turn:turn.example.com:443?transport=tcp'
+			],
+			username   : 'example',
+			credential : 'example'
+		}
+	],
 	redisOptions : {},
 	// session cookie secret
 	cookieSecret : 'T0P-S3cR3t_cook!e',

server/lib/Room.js

@@ -1,4 +1,5 @@
 const EventEmitter = require('events').EventEmitter;
+const axios = require('axios');
 const Logger = require('./Logger');
 const Lobby = require('./Lobby');
 const config = require('../config/config');
@@ -319,7 +320,7 @@ class Room extends EventEmitter
 		}
 	}
 
-	_peerJoining(peer)
+	async _peerJoining(peer)
 	{
 		peer.socket.join(this._roomId);
 
@@ -333,7 +334,46 @@ class Room extends EventEmitter
 		this._peers[peer.id] = peer;
 
 		this._handlePeer(peer);
-		this._notification(peer.socket, 'roomReady');
+
+		let turnServers;
+
+		if ('turnAPIURI' in config)
+		{
+			try
+			{
+				const { data } = await axios.get(
+					config.turnAPIURI,
+					{
+						params : {
+							'uri_schema'  : 'turn',
+							'transport'   : 'tcp',
+							'ip_ver'      : 'ipv4',
+							'servercount' : '2',
+							'api_key'     : config.turnAPIKey,
+							'ip'          : peer.socket.request.connection.remoteAddress
+						}
+					});
+	
+				turnServers = [ {
+					urls       : data.uris,
+					username   : data.username,
+					credential : data.password
+				} ];
+			}
+			catch (error)
+			{
+				if ('backupTurnServers' in config)
+					turnServers = config.backupTurnServers;
+	
+				logger.error('_peerJoining() | error on REST turn [error:"%o"]', error);
+			}
+		}
+		else if ('backupTurnServers' in config)
+		{
+			turnServers = config.backupTurnServers;
+		}
+
+		this._notification(peer.socket, 'roomReady', { turnServers });
 	}
 
 	_handlePeer(peer)

server/package.json

@@ -12,6 +12,7 @@
 	},
 	"dependencies": {
 		"awaitqueue": "^1.0.0",
+		"axios": "^0.19.2",
 		"base-64": "^0.1.0",
 		"body-parser": "^1.19.0",
 		"colors": "^1.4.0",