diff --git a/go.mod b/go.mod
index 9d6b82a..a37d7ef 100644
--- a/go.mod
+++ b/go.mod
@@ -6,7 +6,7 @@ require (
 	github.com/fumiama/go-base16384 v1.2.1
 	github.com/fumiama/go-x25519 v1.0.0
 	github.com/fumiama/gofastTEA v0.0.6
-	github.com/fumiama/water v0.0.0-20211229155341-82646596a427
+	github.com/fumiama/water v0.0.0-20211230051437-3d685121087a
 	github.com/minio/blake2b-simd v0.0.0-20160723061019-3f5f724cb5b1
 	github.com/sirupsen/logrus v1.8.1
 	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b
diff --git a/go.sum b/go.sum
index be098af..d4e2b08 100644
--- a/go.sum
+++ b/go.sum
@@ -12,6 +12,8 @@ github.com/fumiama/gofastTEA v0.0.6 h1:Yni3MXDbJVa/c4CecgdZDgCJK+fLdvGph+OBqY2mt
 github.com/fumiama/gofastTEA v0.0.6/go.mod h1:+sBZ05nCA2skZkursHNvyr8kULlEetrYTM2y5kA4rQc=
 github.com/fumiama/water v0.0.0-20211229155341-82646596a427 h1:6T/Y1o2wrNzJKjhjOsCVkKJwIlU8jfUBfRYFYQ9r3Uc=
 github.com/fumiama/water v0.0.0-20211229155341-82646596a427/go.mod h1:BBnNY9PwK+UUn4trAU+H0qsMEypm7+3Bj1bVFuJItlo=
+github.com/fumiama/water v0.0.0-20211230051437-3d685121087a h1:jVm9uuodbGiBqJzPEHSpYjdFZQ+B9SwBrpXCffr90GY=
+github.com/fumiama/water v0.0.0-20211230051437-3d685121087a/go.mod h1:BBnNY9PwK+UUn4trAU+H0qsMEypm7+3Bj1bVFuJItlo=
 github.com/fumiama/wintun v0.0.0-20211229152851-8bc97c8034c0 h1:WfrSFlIlCAtg6Rt2IGna0HhJYSDE45YVHiYqO4wwsEw=
 github.com/fumiama/wintun v0.0.0-20211229152851-8bc97c8034c0/go.mod h1:dPOG7Af/ArO62RgBz2JJTNFByBn/IXWLo/1kZKcLSe8=
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
diff --git a/gold/link/listen.go b/gold/link/listen.go
index 8841890..1e8b5d8 100644
--- a/gold/link/listen.go
+++ b/gold/link/listen.go
@@ -60,11 +60,12 @@ func (m *Me) listen() (conn *net.UDPConn, err error) {
 										logrus.Infoln("[link] recv query")
 										p.onQuery(&packet)
 									case head.ProtoData:
-										logrus.Infoln("[link] deliver to", p.peerip)
 										if p.pipe != nil {
 											p.pipe <- &packet
+											logrus.Infoln("[link] deliver to pipe of", p.peerip)
 										} else {
 											m.pipe <- &packet
+											logrus.Infoln("[link] deliver to pipe of me")
 										}
 									default:
 										break
diff --git a/lower/nic.go b/lower/nic.go
index dcea473..b9d4896 100644
--- a/lower/nic.go
+++ b/lower/nic.go
@@ -46,12 +46,12 @@ func (nc *NIC) Start(m *link.Me) {
 	go func() { // 接收到 NIC
 		for nc.hasstart {
 			packet := m.Read()
-			_, err := nc.ifce.Write(packet.Data)
+			n, err := nc.ifce.Write(packet.Data)
 			if err != nil {
 				logrus.Errorln("[lower] recv write to nic err:", err)
 				break
 			}
-			logrus.Infoln("[lower] recv write", len(packet.Data), "bytes packet to nic")
+			logrus.Infoln("[lower] recv write", n, "bytes packet to nic")
 		}
 	}()
 	buf := make([]byte, 4096)