Change algorithm of TCP relaying

internal/utils/net_listener.go

@@ -0,0 +1,41 @@
+package utils
+
+import (
+	"fmt"
+	"net"
+
+	"github.com/9seconds/mtg/v2/network"
+)
+
+type Listener struct {
+	net.Listener
+
+	bufferSize int
+}
+
+func (l Listener) Accept() (net.Conn, error) {
+	conn, err := l.Listener.Accept()
+	if err != nil {
+		return nil, err // nolint: wrapcheck
+	}
+
+	if err := network.SetClientSocketOptions(conn, l.bufferSize); err != nil {
+		conn.Close()
+
+		return nil, fmt.Errorf("cannot set TCP options: %w", err)
+	}
+
+	return conn, nil
+}
+
+func NewListener(bindTo string, bufferSize int) (net.Listener, error) {
+	base, err := net.Listen("tcp", bindTo)
+	if err != nil {
+		return nil, fmt.Errorf("cannot build a base listener: %w", err)
+	}
+
+	return Listener{
+		Listener:   base,
+		bufferSize: bufferSize,
+	}, nil
+}