diff --git a/client/main.go b/client/main.go
index c026442..e551c75 100644
--- a/client/main.go
+++ b/client/main.go
@@ -14,7 +14,6 @@ import (
 
 	"golang.org/x/crypto/pbkdf2"
 
-	"github.com/golang/snappy"
 	"github.com/pkg/errors"
 	"github.com/urfave/cli"
 	kcp "github.com/xtaci/kcp-go"
@@ -33,39 +32,6 @@ var VERSION = "SELFBUILD"
 // A pool for stream copying
 var xmitBuf sync.Pool
 
-type compStream struct {
-	conn net.Conn
-	w    *snappy.Writer
-	r    *snappy.Reader
-}
-
-func (c *compStream) Read(p []byte) (n int, err error) {
-	return c.r.Read(p)
-}
-
-func (c *compStream) Write(p []byte) (n int, err error) {
-	if _, err := c.w.Write(p); err != nil {
-		return 0, errors.WithStack(err)
-	}
-
-	if err := c.w.Flush(); err != nil {
-		return 0, errors.WithStack(err)
-	}
-	return len(p), err
-}
-
-func (c *compStream) Close() error {
-	return c.conn.Close()
-}
-
-func newCompStream(conn net.Conn) *compStream {
-	c := new(compStream)
-	c.conn = conn
-	c.w = snappy.NewBufferedWriter(conn)
-	c.r = snappy.NewReader(conn)
-	return c
-}
-
 func handleClient(sess *smux.Session, p1 io.ReadWriteCloser, quiet bool) {
 	logln := func(v ...interface{}) {
 		if !quiet {
@@ -407,7 +373,7 @@ func main() {
 			if config.NoComp {
 				session, err = smux.Client(kcpconn, smuxConfig)
 			} else {
-				session, err = smux.Client(newCompStream(kcpconn), smuxConfig)
+				session, err = smux.Client(generic.NewCompStream(kcpconn), smuxConfig)
 			}
 			if err != nil {
 				return nil, errors.Wrap(err, "createConn()")
diff --git a/generic/comp.go b/generic/comp.go
new file mode 100644
index 0000000..03f6aea
--- /dev/null
+++ b/generic/comp.go
@@ -0,0 +1,41 @@
+package generic
+
+import (
+	"net"
+
+	"github.com/golang/snappy"
+	"github.com/pkg/errors"
+)
+
+type CompStream struct {
+	conn net.Conn
+	w    *snappy.Writer
+	r    *snappy.Reader
+}
+
+func (c *CompStream) Read(p []byte) (n int, err error) {
+	return c.r.Read(p)
+}
+
+func (c *CompStream) Write(p []byte) (n int, err error) {
+	if _, err := c.w.Write(p); err != nil {
+		return 0, errors.WithStack(err)
+	}
+
+	if err := c.w.Flush(); err != nil {
+		return 0, errors.WithStack(err)
+	}
+	return len(p), err
+}
+
+func (c *CompStream) Close() error {
+	return c.conn.Close()
+}
+
+func NewCompStream(conn net.Conn) *CompStream {
+	c := new(CompStream)
+	c.conn = conn
+	c.w = snappy.NewBufferedWriter(conn)
+	c.r = snappy.NewReader(conn)
+	return c
+}
diff --git a/server/main.go b/server/main.go
index 659927b..fdcad03 100644
--- a/server/main.go
+++ b/server/main.go
@@ -18,8 +18,6 @@ import (
 
 	"path/filepath"
 
-	"github.com/golang/snappy"
-	"github.com/pkg/errors"
 	"github.com/urfave/cli"
 	kcp "github.com/xtaci/kcp-go"
 	"github.com/xtaci/kcptun/generic"
@@ -35,39 +33,6 @@ var VERSION = "SELFBUILD"
 // A pool for stream copying
 var xmitBuf sync.Pool
 
-type compStream struct {
-	conn net.Conn
-	w    *snappy.Writer
-	r    *snappy.Reader
-}
-
-func (c *compStream) Read(p []byte) (n int, err error) {
-	return c.r.Read(p)
-}
-
-func (c *compStream) Write(p []byte) (n int, err error) {
-	if _, err := c.w.Write(p); err != nil {
-		return 0, errors.WithStack(err)
-	}
-
-	if err := c.w.Flush(); err != nil {
-		return 0, errors.WithStack(err)
-	}
-	return len(p), err
-}
-
-func (c *compStream) Close() error {
-	return c.conn.Close()
-}
-
-func newCompStream(conn net.Conn) *compStream {
-	c := new(compStream)
-	c.conn = conn
-	c.w = snappy.NewBufferedWriter(conn)
-	c.r = snappy.NewReader(conn)
-	return c
-}
-
 // handle multiplex-ed connection
 func handleMux(conn io.ReadWriteCloser, config *Config) {
 	// stream multiplex
@@ -414,7 +379,7 @@ func main() {
 				if config.NoComp {
 					go handleMux(conn, &config)
 				} else {
-					go handleMux(newCompStream(conn), &config)
+					go handleMux(generic.NewCompStream(conn), &config)
 				}
 			} else {
 				log.Printf("%+v", err)