Use TURN servers when placing/receiving calls.

lib/client.js

@@ -1096,6 +1096,14 @@ MatrixClient.prototype.turnServer = function(callback) {
     return this._http.authedRequest(callback, "GET", "/voip/turnServer");
 };
 
+/**
+ * Get the TURN servers for this home server.
+ * @return {Array<Object>} The servers or an empty list.
+ */
+MatrixClient.prototype.getTurnServers = function() {
+    return this._turnServers || [];
+};
+
 /**
  * @return {boolean} true if there is a valid access_token for this client.
  */
@@ -1570,13 +1578,21 @@ function setupCallEventHandler(client) {
 }
 
 function checkTurnServers(client) {
-    if (!client._supportsVoip || !client.running) {
+    if (!client._supportsVoip) {
         return;
     }
-    client.turnServers().done(function(res) {
+    client.turnServer().done(function(res) {
         if (res.uris) {
-            console.log("Got TURN URIs: " + res.uris);
-            client._turnServers = res;
+            console.log("Got TURN URIs: " + res.uris + " refresh in " +
+                res.ttl + " secs");
+            // map the response to a format that can be fed to
+            // RTCPeerConnection
+            var servers = {
+                urls: res.uris,
+                username: res.username,
+                credential: res.password
+            };
+            client._turnServers = [servers];
             // re-fetch when we're about to reach the TTL
             setTimeout(function() { checkTurnServers(client); },
                 (res.ttl || (60 * 60)) * 1000 * 0.9
@@ -1584,7 +1600,6 @@ function checkTurnServers(client) {
         }
     }, function(err) {
         console.error("Failed to get TURN URIs");
-        client._turnServers = {};
         setTimeout(function() { checkTurnServers(client); }, 60000);
     });
 }