Send localDescription instead of original SDP.

rtpconn/webclient.go

@@ -464,7 +464,7 @@ func negotiate(c *webClient, down *rtpDownConnection, renegotiate, restartIce bo
 		Id:       down.id,
 		Source:   source,
 		Username: username,
-		SDP:      offer.SDP,
+		SDP:      down.pc.LocalDescription().SDP,
 		Labels:   labels,
 	})
 }
@@ -527,7 +527,7 @@ func gotOffer(c *webClient, id string, sdp string, renegotiate bool, labels map[
 	return c.write(clientMessage{
 		Type: "answer",
 		Id:   id,
-		SDP:  answer.SDP,
+		SDP:  up.pc.LocalDescription().SDP,
 	})
 }
 

static/galene.js

@@ -2090,10 +2090,10 @@ async function relayTest() {
 
             let offer = await pc1.createOffer();
             await pc1.setLocalDescription(offer);
-            await pc2.setRemoteDescription(offer);
+            await pc2.setRemoteDescription(pc1.localDescription);
             let answer = await pc2.createAnswer();
-            pc2.setLocalDescription(answer);
-            await pc1.setRemoteDescription(answer);
+            await pc2.setLocalDescription(answer);
+            await pc1.setRemoteDescription(pc2.localDescription);
 
             pc2.ondatachannel = e => {
                 let d2 = e.channel;

static/protocol.js

@@ -595,7 +595,7 @@ ServerConnection.prototype.gotOffer = async function(id, labels, source, usernam
         this.send({
             type: 'answer',
             id: id,
-            sdp: answer.sdp,
+            sdp: c.pc.localDescription.sdp,
         });
     } catch(e) {
         try {
@@ -1021,7 +1021,7 @@ Stream.prototype.negotiate = async function (restartIce) {
         kind: this.localDescriptionSent ? 'renegotiate' : '',
         id: c.id,
         labels: c.labelsByMid,
-        sdp: offer.sdp,
+        sdp: c.pc.localDescription.sdp,
     });
     this.localDescriptionSent = true;
     c.flushLocalIceCandidates();