Refactor timeoutrwc to wrappers

proxy/server.go

 }
 
 func (s *Server) getClientStream(ctx context.Context, cancel context.CancelFunc, conn net.Conn, socketID string) (io.ReadWriteCloser, int16, error) {
-	wConn := newTimeoutReadWriteCloser(conn, s.readTimeout, s.writeTimeout)
+	wConn := wrappers.NewTimeoutRWC(conn, s.readTimeout, s.writeTimeout)
 	wConn = newTrafficReadWriteCloser(wConn, s.stats.addIncomingTraffic, s.stats.addOutgoingTraffic)
 	frame, err := obfuscated2.ExtractFrame(wConn)
 	if err != nil {
 	if err != nil {
 		return nil, errors.Annotate(err, "Cannot dial")
 	}
-	wConn := newTimeoutReadWriteCloser(socket, s.readTimeout, s.writeTimeout)
+	wConn := wrappers.NewTimeoutRWC(socket, s.readTimeout, s.writeTimeout)
 	wConn = newTrafficReadWriteCloser(wConn, s.stats.addIncomingTraffic, s.stats.addOutgoingTraffic)
 
 	obfs2, frame := obfuscated2.MakeTelegramObfuscated2Frame()

proxy/timeoutrwc.go

-package proxy
-
-import (
-	"io"
-	"net"
-	"time"
-)
-
-// TimeoutReadWriteCloser sets timeouts for read/write into underlying
-// network connection.
-type TimeoutReadWriteCloser struct {
-	conn         net.Conn
-	readTimeout  time.Duration
-	writeTimeout time.Duration
-}
-
-// Read reads from connection
-func (t *TimeoutReadWriteCloser) Read(p []byte) (int, error) {
-	t.conn.SetReadDeadline(time.Now().Add(t.readTimeout)) // nolint: errcheck, gas
-	return t.conn.Read(p)
-}
-
-// Write writes into connection.
-func (t *TimeoutReadWriteCloser) Write(p []byte) (int, error) {
-	t.conn.SetWriteDeadline(time.Now().Add(t.writeTimeout)) // nolint: errcheck, gas
-	return t.conn.Write(p)
-}
-
-// Close closes underlying connection.
-func (t *TimeoutReadWriteCloser) Close() error {
-	return t.conn.Close()
-}
-
-func newTimeoutReadWriteCloser(conn net.Conn, readTimeout, writeTimeout time.Duration) io.ReadWriteCloser {
-	return &TimeoutReadWriteCloser{
-		conn:         conn,
-		readTimeout:  readTimeout,
-		writeTimeout: writeTimeout,
-	}
-}