initial commit

internal/util/mux/mux.go

@@ -0,0 +1,85 @@
+package mux
+
+import (
+	"net"
+
+	smux "github.com/xtaci/smux"
+)
+
+type Session struct {
+	conn    net.Conn
+	session *smux.Session
+}
+
+func ClientSession(conn net.Conn) (*Session, error) {
+	s, err := smux.Client(conn, smux.DefaultConfig())
+	if err != nil {
+		return nil, err
+	}
+	return &Session{
+		conn:    conn,
+		session: s,
+	}, nil
+}
+
+func ServerSession(conn net.Conn) (*Session, error) {
+	s, err := smux.Server(conn, smux.DefaultConfig())
+	if err != nil {
+		return nil, err
+	}
+	return &Session{
+		conn:    conn,
+		session: s,
+	}, nil
+}
+
+func (session *Session) GetConn() (net.Conn, error) {
+	stream, err := session.session.OpenStream()
+	if err != nil {
+		return nil, err
+	}
+	return &streamConn{Conn: session.conn, stream: stream}, nil
+}
+
+func (session *Session) Accept() (net.Conn, error) {
+	stream, err := session.session.AcceptStream()
+	if err != nil {
+		return nil, err
+	}
+	return &streamConn{Conn: session.conn, stream: stream}, nil
+}
+
+func (session *Session) Close() error {
+	if session.session == nil {
+		return nil
+	}
+	return session.session.Close()
+}
+
+func (session *Session) IsClosed() bool {
+	if session.session == nil {
+		return true
+	}
+	return session.session.IsClosed()
+}
+
+func (session *Session) NumStreams() int {
+	return session.session.NumStreams()
+}
+
+type streamConn struct {
+	net.Conn
+	stream *smux.Stream
+}
+
+func (c *streamConn) Read(b []byte) (n int, err error) {
+	return c.stream.Read(b)
+}
+
+func (c *streamConn) Write(b []byte) (n int, err error) {
+	return c.stream.Write(b)
+}
+
+func (c *streamConn) Close() error {
+	return c.stream.Close()
+}