Port:          80,
				FWMark:        0,
				SchedName:     "",
				Flags:         uint32(FlagPersistent + FlagHashed),
				Timeout:       0,
				Netmask:       0xffffffff,
				AddressFamily: unix.AF_INET,
				Address:       nil,
				PEName:        "",
			},
			VirtualServer{
				Address:   netutils.ParseIPSloppy("0.0.0.0"),
				Protocol:  "TCP",
				Port:      80,
				Scheduler: "",

func (a *Inet4Addr) Family() int { return syscall.AF_INET }

func (a *Inet4Addr) lenAndSpace() (int, int) {
	return sizeofSockaddrInet, roundup(sizeofSockaddrInet)
}

func (a *Inet4Addr) marshal(b []byte) (int, error) {
	l, ll := a.lenAndSpace()
	if len(b) < ll {
		return 0, errShortBuffer
	}
	b[0] = byte(l)
	b[1] = syscall.AF_INET
	copy(b[4:8], a.IP[:])
	return ll, nil
}

	}

	// TODO(bradfitz,brainman): use ctx more. See TODO below.

	var family int32 = syscall.AF_UNSPEC
	switch ipVersion(network) {
	case '4':
		family = syscall.AF_INET
	case '6':
		family = syscall.AF_INET6
	}

	getaddr := func() ([]IPAddr, error) {
		if err := acquireThread(ctx); err != nil {
			return nil, &DNSError{
				Name:      name,

		fd := ln.(*TCPListener).fd
		if err := checkDualStackAddrFamily(fd); err != nil {
			return err
		}
	case "tcp4":
		fd := ln.(*TCPListener).fd
		if fd.family != syscall.AF_INET {
			return fmt.Errorf("%v got %v; want %v", fd.laddr, fd.family, syscall.AF_INET)
		}
	case "tcp6":
		fd := ln.(*TCPListener).fd
		if fd.family != syscall.AF_INET6 {
			return fmt.Errorf("%v got %v; want %v", fd.laddr, fd.family, syscall.AF_INET6)
		}

		fd.Close()
		return nil, err
	}
	return fd, nil
}

func validateResolvedAddr(net string, family int, sa sockaddr) error {
	validateIP := func(ip IP) error {
		switch family {
		case syscall.AF_INET:
			if len(ip) != 4 {
				return &AddrError{
					Err:  "non-IPv4 address",
					Addr: ip.String(),
				}
			}
		case syscall.AF_INET6:
			if len(ip) != 16 {
				return &AddrError{

func (sa *SockaddrInet4) sockaddr() (unsafe.Pointer, _Socklen, error) {
	if sa.Port < 0 || sa.Port > 0xFFFF {
		return nil, 0, EINVAL
	}
	sa.raw.Len = SizeofSockaddrInet4
	sa.raw.Family = AF_INET
	p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port))
	p[0] = byte(sa.Port >> 8)
	p[1] = byte(sa.Port)
	sa.raw.Addr = sa.Addr
	return unsafe.Pointer(&sa.raw), _Socklen(sa.raw.Len), nil
}

func (sa *SockaddrInet4) sockaddr() (unsafe.Pointer, _Socklen, error) {
	if sa.Port < 0 || sa.Port > 0xFFFF {
		return nil, 0, EINVAL
	}
	sa.raw.Len = SizeofSockaddrInet4
	sa.raw.Family = AF_INET
	p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port))
	p[0] = byte(sa.Port >> 8)
	p[1] = byte(sa.Port)
	sa.raw.Addr = sa.Addr
	return unsafe.Pointer(&sa.raw), _Socklen(sa.raw.Len), nil
}

}

func (sa *SockaddrInet4) sockaddr() (unsafe.Pointer, _Socklen, error) {
	if sa.Port < 0 || sa.Port > 0xFFFF {
		return nil, 0, EINVAL
	}
	sa.raw.Family = AF_INET
	p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port))
	p[0] = byte(sa.Port >> 8)
	p[1] = byte(sa.Port)
	sa.raw.Addr = sa.Addr
	return unsafe.Pointer(&sa.raw), SizeofSockaddrInet4, nil
}

		return 0, nil, err
	}
	return nfd, sa, nil
}

func (sa *SockaddrInet4) sockaddr() (unsafe.Pointer, _Socklen, error) {
	if sa.Port < 0 || sa.Port > 0xFFFF {
		return nil, 0, EINVAL
	}
	sa.raw.Family = AF_INET
	p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port))
	p[0] = byte(sa.Port >> 8)
	p[1] = byte(sa.Port)
	sa.raw.Addr = sa.Addr
	return unsafe.Pointer(&sa.raw), SizeofSockaddrInet4, nil
}

func (sa *SockaddrInet4) sockaddr() (unsafe.Pointer, _Socklen, error) {
	if sa.Port < 0 || sa.Port > 0xFFFF {
		return nil, 0, EINVAL
	}
	sa.raw.Family = AF_INET
	p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port))
	p[0] = byte(sa.Port >> 8)
	p[1] = byte(sa.Port)
	sa.raw.Addr = sa.Addr
	return unsafe.Pointer(&sa.raw), SizeofSockaddrInet4, nil
}