// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package net

import (
	"bytes"
	"context"
	"errors"
	"syscall"
	"testing"
)

func newLocalListenerMPTCP(t *testing.T, envVar bool) Listener {
	lc := &ListenConfig{}

	if envVar {
		if !lc.MultipathTCP() {
			t.Fatal("MultipathTCP Listen is not on despite GODEBUG=multipathtcp=1")
		}
	} else {