// A zero value for t means WriteTo will not time out.
	SetWriteDeadline(t time.Time) error
}

var listenerBacklogCache struct {
	sync.Once
	val int
}

// listenerBacklog is a caching wrapper around maxListenerBacklog.
//
// listenerBacklog should be an internal detail,
// but widely used packages access it using linkname.
// Notable members of the hall of shame include:
//   - github.com/database64128/tfo-go/v2

	// the other connection holders.

	if laddr != nil && raddr == nil {
		switch sotype {
		case syscall.SOCK_STREAM, syscall.SOCK_SEQPACKET:
			if err := fd.listenStream(ctx, laddr, listenerBacklog(), ctrlCtxFn); err != nil {
				fd.Close()
				return nil, err
			}
			return fd, nil
		case syscall.SOCK_DGRAM:
			if err := fd.listenDatagram(ctx, laddr, ctrlCtxFn); err != nil {
				fd.Close()

	}
	if !ok {
		return wrapErr(syscall.ECONNREFUSED)
	}

	fd.isConnected = true
	fd.peer = peer
	peer.peer = fd

	incoming = append(incoming, peer)
	if len(incoming) >= listenerBacklog() {
		ln.incomingFull <- incoming
	} else {
		ln.incoming <- incoming
	}
	return nil
}

func (ffd *fakeNetFD) assignFakeAddr(addr sockaddr) error {
	validate := func(sa sockaddr) error {

	data="/usr/local/google/home/mknyszek/work/go-1/src/net/sock_linux.go"
String id=163
	data="net.listenerBacklog.func1"
String id=164
	data="sync.(*Once).doSlow"
String id=165
	data="/usr/local/google/home/mknyszek/work/go-1/src/sync/once.go"
String id=166
	data="sync.(*Once).Do"
String id=167
	data="net.listenerBacklog"
String id=168
	data="syscall.Listen"
String id=169
	data="sync.(*WaitGroup).Wait"