Close SocksConn when WebRTC connection is reset

* This will induce the tor client to establish a new SocksConn,
   which in turn will dial a new WebRTC connection.

   To be improved upon.

 * Part of #12

client/snowflake.go

@@ -99,6 +99,12 @@ func handler(conn *pt.SocksConn) error {
 	defer remote.Close()
 	webrtcRemote = remote
 
+	// Induce another call to handler
+	go func() {
+		<-remote.reset
+		conn.Close()
+	}()
+
 	err = conn.Grant(&net.TCPAddr{IP: net.IPv4zero, Port: 0})
 	if err != nil {
 		return err

client/webrtc.go

@@ -101,27 +101,24 @@ func NewWebRTCConnection(config *webrtc.Configuration,
 
 // WebRTC re-establishment loop. Expected in own goroutine.
 func (c *webRTCConn) ConnectLoop() {
-	for {
+	log.Println("Establishing WebRTC connection...")
-		log.Println("Establishing WebRTC connection...")
+	// TODO: When go-webrtc is more stable, it's possible that a new
-		// TODO: When go-webrtc is more stable, it's possible that a new
+	// PeerConnection won't need to be re-prepared each time.
-		// PeerConnection won't need to be re-prepared each time.
+	err := c.preparePeerConnection()
-		err := c.preparePeerConnection()
+	if err != nil {
-		if err != nil {
+		log.Println("WebRTC: Could not create PeerConnection.")
-			log.Println("WebRTC: Could not create PeerConnection.")
+		return
-			break
-		}
-		err = c.establishDataChannel()
-		if err != nil {
-			log.Println("WebRTC: Could not establish DataChannel.")
-		} else {
-			go c.exchangeSDP()
-			<-c.reset
-			log.Println(" --- snowflake connection reset ---")
-		}
-		<-time.After(time.Second * 1)
-		c.cleanup()
 	}
-	log.Println("WebRTC cannot connect.")
+	err = c.establishDataChannel()
+	if err != nil {
+		log.Println("WebRTC: Could not establish DataChannel.")
+	} else {
+		go c.exchangeSDP()
+		<-c.reset
+		log.Println(" --- snowflake connection reset ---")
+	}
+	<-time.After(time.Second * 1)
+	c.cleanup()
 }
 
 // Create and prepare callbacks on a new WebRTC PeerConnection.