Multi-node capability

README.md

@@ -6,10 +6,11 @@ WebRTC offer/answer exchange is performed manually by the users, for example
 via IM.  This means that the app can run out of `file:///` directly, without
 involving a web server.  You can send text messages and files between peers.
 
-This repository contains two different clients that can talk to each other:
+This repository contains three different clients that can talk to each other:
 
 1. `serverless-webrtc.js` runs under node.js
 2. `serverless-webrtc.html` runs in Chrome or Firefox
+3. `serverless-webrtc-multinode.html` runs in Chrome or Firefox
 
 Chat is fully interoperable between all of the above (Node, Chrome, Firefox)
 in any combination (tested with Chrome 35 and Firefox 29).
@@ -53,3 +54,25 @@ http://blog.printf.net/articles/2014/07/01/serverless-webrtc-continued
 http://cjb.github.io/serverless-webrtc/serverless-webrtc.html
 
 -- Chris Ball <chris@printf.net> (http://printf.net/)
+
+#### Multi-node capability
+
+serverless-webrtc-multinode.html adds on top of serverless-webrtc.html the functionality of many-to-many connections.
+
+It just does so by making a new WebRTC peer connection for each new pair of users.
+
+Peer connections are either ''Guest'' connections (Bob the recipient), or ''Host'' connections (Alice the sender)
+
+An unordered list (labeled ''Network'') at the bottom of the page shows all the connections made between you and other users.
+
+You could send text to all connected users at once via the ''Send to all'' button, or to a particular user via the ''Send''
+
+button near his/her nickname in the ''Network'' list.
+
+Individual connections can also be closed, or queried for their Round Trip Duration (labeled RTD) via the ''Latency'' button.
+
+RTD is queried by sending an ''echo request'' package, which automatically triggers an ''echo response'' from the other user.
+
+One could optionally use different nicknames for different connections.
+
+At the moment, sending a file would transmit it only to the last connection made

js/SWGuestConnection.js

@@ -0,0 +1,84 @@
+// This is a moderatorless version of
+// http://www.rtcmulticonnection.org/docs/
+
+/* THIS IS BOB, THE ANSWERER/RECEIVER */
+
+function SWGuestConnection() {
+return {
+    username: null,
+    counterparty: null,
+    lastTimestamp: null,
+    latency: null,
+    pc2 : new RTCPeerConnection(cfg, con),
+    dc2 : null,
+    guestConnections: null,
+    p1: null,
+    init: function(un,pc2a2,p11) {
+        var self=this;
+        self.username=un;
+	self.guestConnections=pc2a2;
+	self.p1=p11;
+
+        self.pc2.ondatachannel = function (e) {
+            var fileReceiver2 = new FileReceiver();
+            var datachannel = e.channel || e; // Chrome sends event, FF sends raw channel
+            console.log("Received datachannel (pc2)", arguments);
+            self.dc2 = datachannel;
+            activedc = self.dc2;
+            self.dc2.onopen = function (e) {
+                console.log('data channel connect');
+                $('#waitForConnection').remove();
+                $('#showLocalAnswer').modal('hide');
+                setTimeout(function() { self.send('Initiated'); }, 500);
+                setTimeout(function() { self.send('','echo request'); }, 1500);
+            };
+            self.dc2.onmessage = function (e) { handleOnMessage(e,self); };
+        };
+
+        self.pc2.onsignalingstatechange = onsignalingstatechange;
+        self.pc2.oniceconnectionstatechange = function(e) { oniceconnectionstatechange(e,self) };
+        self.pc2.onicegatheringstatechange = onicegatheringstatechange;
+
+        self.pc2.onaddstream = function (e) {
+            console.log("Got remote stream", e);
+            var el = new Audio();
+            el.autoplay = true;
+            attachMediaStream(el, e.stream);
+        };
+
+        self.pc2.onconnection = handleOnconnection;
+
+	self.pc2.onicecandidate = function (e) {
+	    console.log("ICE candidate (pc2)", e);
+	    if (e.candidate == null)
+	       $('#localAnswer').html(JSON.stringify(self.pc2.localDescription));
+	};
+
+	return self;
+    },
+    send: function(msg,type) {
+        var self=this;
+        self.dc2.send(JSON.stringify({
+            username: self.username,
+            message: msg,
+            timestamp: getTimestamp(),
+	    type: type
+        }));
+    },
+    handleOfferFromPC1:function(offerDesc) {
+        var self=this;
+        self.pc2.setRemoteDescription(offerDesc);
+        self.pc2.createAnswer(function (answerDesc) {
+        self.pc2.setLocalDescription(answerDesc);
+        }, function () { console.warn("No create answer"); });
+    },
+    close: function() {
+	this.pc2.close();
+	if(this.echoId!=null) {
+            clearTimeout(this.echoId);
+            this.echoId=null;
+	}
+    },
+    echoId:null,
+};
+}

js/SWHostConnection.js

@@ -0,0 +1,68 @@
+/* THIS IS ALICE, THE CALLER/SENDER */
+
+function SWHostConnection() {
+return {
+    username: null,
+    counterparty: null,
+    lastTimestamp: null,
+    latency: null,
+    pc1 : new RTCPeerConnection(cfg, con),
+    dc1 : null,
+    setupDC1: function() {
+        try {
+        var self=this;
+        self.dc1 = self.pc1.createDataChannel('test', {reliable:true});
+        activedc = self.dc1;
+        console.log("Created datachannel (pc1)");
+	self.dc1.onopen = function (e) {
+	    console.log('data channel connect');
+	    $('#waitForConnection').modal('hide');
+	    $('#waitForConnection').remove();
+	    self.send('Initiated');
+	    setTimeout(function() { self.send('','echo request'); }, 1000);
+	};
+        self.dc1.onmessage = function (e) { handleOnMessage(e,self); };
+        } catch (e) { console.warn("No data channel (pc1)", e); }
+    },
+    createLocalOffer: function() {
+        var self=this;
+        self.setupDC1();
+        self.pc1.createOffer(function (desc) {
+            self.pc1.setLocalDescription(desc, function () {});
+            console.log("created local offer", desc);
+        }, function () {console.warn("Couldn't create offer");});
+    },
+    init: function(un) {
+        var self=this;
+        self.username=un;
+        self.pc1.onconnection = handleOnconnection;
+        self.pc1.onsignalingstatechange = onsignalingstatechange;
+        self.pc1.oniceconnectionstatechange = function(e) { oniceconnectionstatechange(e,self) };
+        self.pc1.onicegatheringstatechange = onicegatheringstatechange;
+	self.pc1.onicecandidate = function (e) {
+	    console.log("ICE candidate (pc1)", e);
+	    if (e.candidate == null) {
+		$('#localOffer').html(JSON.stringify(self.pc1.localDescription));
+	    }
+	};
+	return self;
+    },
+    send: function(msg,type) {
+        var self=this;
+        self.dc1.send(JSON.stringify({
+            username: self.username,
+            message: msg,
+            timestamp: getTimestamp(),
+            type: type
+        }));
+    },
+    close: function() {
+	this.pc1.close();
+	if(this.echoId!=null) {
+            clearTimeout(this.echoId);
+            this.echoId=null;
+	}
+    },
+    echoId:null,
+};
+}