Set buffer sizes to sockets

client/direct.go

 	"github.com/9seconds/mtg/wrappers"
 )
 
-const handshakeTimeout = 10 * time.Second
+const (
+	handshakeTimeout = 10 * time.Second
+	readBufferSize   = 64 * 1024
+	writeBufferSize  = 64 * 1024
+)
 
 func DirectInit(socket net.Conn, connID string, conf *config.Config) (wrappers.Wrap, *mtproto.ConnectionOpts, error) {
-	if err := config.SetSocketOptions(socket); err != nil {
-		return nil, nil, errors.Annotate(err, "Cannot set socket options")
+	tcpSocket := socket.(*net.TCPConn)
+	if err := tcpSocket.SetNoDelay(false); err != nil {
+		return nil, nil, errors.Annotate(err, "Cannot disable NO_DELAY to client socket")
+	}
+	if err := tcpSocket.SetReadBuffer(readBufferSize); err != nil {
+		return nil, nil, errors.Annotate(err, "Cannot set read buffer size of client socket")
+	}
+	if err := tcpSocket.SetWriteBuffer(writeBufferSize); err != nil {
+		return nil, nil, errors.Annotate(err, "Cannot set write buffer size of client socket")
 	}
 
 	socket.SetReadDeadline(time.Now().Add(handshakeTimeout))

config/config.go

 
 	return conf, nil
 }
-
-// SetSocketOptions makes socket keepalive, sets buffer sizes
-func SetSocketOptions(conn net.Conn) error {
-	socket := conn.(*net.TCPConn)
-
-	if err := socket.SetReadBuffer(BufferReadSize); err != nil {
-		return errors.Annotate(err, "Cannot set read buffer size")
-	}
-	if err := socket.SetWriteBuffer(BufferWriteSize); err != nil {
-		return errors.Annotate(err, "Cannot set write buffer size")
-	}
-	if err := socket.SetNoDelay(true); err != nil {
-		return errors.Annotate(err, "Cannot activate nodelay for the socket")
-	}
-
-	return nil
-}

telegram/dialer.go

 	"github.com/9seconds/mtg/wrappers"
 )
 
-const telegramDialTimeout = 10 * time.Second
+const (
+	telegramDialTimeout = 10 * time.Second
+	readBufferSize      = 64 * 1024
+	writeBufferSize     = 64 * 1024
+)
 
 type tgDialer struct {
 	net.Dialer
 	if err != nil {
 		return nil, errors.Annotate(err, "Cannot connect to Telegram")
 	}
-	if err = config.SetSocketOptions(conn); err != nil {
-		return nil, errors.Annotate(err, "Cannot set socket options")
+
+	tcpSocket := conn.(*net.TCPConn)
+	if err = tcpSocket.SetNoDelay(true); err != nil {
+		return nil, errors.Annotate(err, "Cannot set NO_DELAY to Telegram")
+	}
+	if err = tcpSocket.SetReadBuffer(readBufferSize); err != nil {
+		return nil, errors.Annotate(err, "Cannot set read buffer size on telegram socket")
+	}
+	if err = tcpSocket.SetWriteBuffer(writeBufferSize); err != nil {
+		return nil, errors.Annotate(err, "Cannot set write buffer size on telegram socket")
 	}
 
 	return conn, nil