Code refactoring

Code refactoring

pkg/webrtc/README.md

@@ -0,0 +1,11 @@
+## StateChange
+
+1. offer = pc.CreateOffer()
+2. pc.SetLocalDescription(offer)
+3. OnICEGatheringStateChange: gathering
+4. OnSignalingStateChange: have-local-offer
+*. OnICEGatheringStateChange: complete
+5. pc.SetRemoteDescription(answer)
+6. OnSignalingStateChange: stable
+7. OnICEConnectionStateChange: checking
+8. OnICEConnectionStateChange: connected

pkg/webrtc/server.go

@@ -57,7 +57,7 @@ func (c *Conn) GetAnswer() (answer string, err error) {
 		return
 	}
 
-	return desc.SDP, nil
+	return c.pc.LocalDescription().SDP, nil
 }
 
 func (c *Conn) GetCompleteAnswer() (answer string, err error) {