稍微优化一下

protocol/tunnel.go

@@ -49,6 +49,7 @@ func (this *Tunnel) run() { //单向的，从src发送到dest
 	cipherDirection := this.cipherDirection
 	id := this.id
 	defer func() {
+		log.Info("tunnel id %s ends", id)
 		if r := recover(); r != nil {
 			if src != nil {
 				src.Close()
@@ -56,7 +57,6 @@ func (this *Tunnel) run() { //单向的，从src发送到dest
 			if dest != nil {
 				dest.Close()
 			}
-
 		}
 	}()
 	cache := make([]byte, 1024*4) //4kB