type Ifreq struct{ raw ifreq }

// NewIfreq creates an Ifreq with the input network interface name after
// validating the name does not exceed IFNAMSIZ-1 (trailing NULL required)
// bytes.
func NewIfreq(name string) (*Ifreq, error) {
	// Leave room for terminating NULL byte.
	if len(name) >= IFNAMSIZ {
		return nil, EINVAL
	}

	var ifr ifreq
	copy(ifr.Ifrn[:], name)

	return &Ifreq{raw: ifr}, nil
}

	p[0] = byte(proto >> 8)
	p[1] = byte(proto)
	lsall.Ifindex = ifindex
	e = Bind(s, &lsall)
	if e != nil {
		Close(s)
		return 0, e
	}
	return s, nil
}

type iflags struct {
	name  [IFNAMSIZ]byte
	flags uint16
}

// Deprecated: Use golang.org/x/net/bpf instead.
func SetLsfPromisc(name string, m bool) error {
	s, e := Socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC, 0)
	if e != nil {
		return e
	}

}

// Deprecated: Use golang.org/x/net/bpf instead.
func FlushBpf(fd int) error {
	err := ioctlPtr(fd, BIOCFLUSH, nil)
	if err != nil {
		return err
	}
	return nil
}

type ivalue struct {
	name  [IFNAMSIZ]byte
	value int16
}

// Deprecated: Use golang.org/x/net/bpf instead.
func BpfInterface(fd int, name string) (string, error) {
	var iv ivalue
	err := ioctlPtr(fd, BIOCGETIF, unsafe.Pointer(&iv))
	if err != nil {

		$2 ~ /^(AF|SOCK|SO|SOL|IPPROTO|IP|IPV6|ICMP6|TCP|EVFILT|NOTE|EV|SHUT|PROT|MAP|PACKET|MSG|SCM|MCL|DT|MADV|PR)_/ ||
		$2 == "ICMPV6_FILTER" ||
		$2 == "SOMAXCONN" ||
		$2 == "NAME_MAX" ||
		$2 == "IFNAMSIZ" ||
		$2 ~ /^CTL_(MAXNAME|NET|QUERY)$/ ||
		$2 ~ /^SYSCTL_VERS/ ||
		$2 ~ /^(MS|MNT)_/ ||
		$2 ~ /^TUN(SET|GET|ATTACH|DETACH)/ ||
		$2 ~ /^(O|F|FD|NAME|S|PTRACE|PT)_/ ||
		$2 ~ /^LINUX_REBOOT_CMD_/ ||

		$2 ~ /^(AF|SOCK|SO|SOL|IPPROTO|IP|IPV6|ICMP6|TCP|EVFILT|NOTE|EV|SHUT|PROT|MAP|PACKET|MSG|SCM|MCL|DT|MADV|PR)_/ ||
		$2 == "ICMPV6_FILTER" ||
		$2 == "SOMAXCONN" ||
		$2 == "NAME_MAX" ||
		$2 == "IFNAMSIZ" ||
		$2 ~ /^CTL_(MAXNAME|NET|QUERY)$/ ||
		$2 ~ /^SYSCTL_VERS/ ||
		$2 ~ /^(MS|MNT)_/ ||
		$2 ~ /^TUN(SET|GET|ATTACH|DETACH)/ ||
		$2 ~ /^(O|F|FD|NAME|S|PTRACE|PT)_/ ||
		$2 ~ /^LINUX_REBOOT_CMD_/ ||

		$2 ~ /^RAW_PAYLOAD_/ ||
		$2 ~ /^[US]F_/ ||
		$2 ~ /^TP_STATUS_/ ||
		$2 ~ /^FALLOC_/ ||
		$2 ~ /^ICMPV?6?_(FILTER|SEC)/ ||
		$2 == "SOMAXCONN" ||
		$2 == "NAME_MAX" ||
		$2 == "IFNAMSIZ" ||
		$2 ~ /^CTL_(HW|KERN|MAXNAME|NET|QUERY)$/ ||
		$2 ~ /^KERN_(HOSTNAME|OS(RELEASE|TYPE)|VERSION)$/ ||
		$2 ~ /^HW_MACHINE$/ ||
		$2 ~ /^SYSCTL_VERS/ ||
		$2 !~ "MNT_BITS" &&
		$2 ~ /^(MS|MNT|MOUNT|UMOUNT)_/ ||

	IFF_POINTOPOINT                   = 0x10
	IFF_PROMISC                       = 0x100
	IFF_RUNNING                       = 0x40
	IFF_SIMPLEX                       = 0x800
	IFF_UP                            = 0x1
	IFNAMSIZ                          = 0x10
	IFT_1822                          = 0x2
	IFT_AAL5                          = 0x31
	IFT_ARCNET                        = 0x23
	IFT_ARCNETPLUS                    = 0x24

	IFF_SNAP                      = 0x8000
	IFF_TCP_DISABLE_CKSUM         = 0x20000000
	IFF_TCP_NOCKSUM               = 0x1000000
	IFF_UP                        = 0x1
	IFF_VIPA                      = 0x80000000
	IFNAMSIZ                      = 0x10
	IFO_FLUSH                     = 0x1
	IFT_1822                      = 0x2
	IFT_AAL5                      = 0x31
	IFT_ARCNET                    = 0x23
	IFT_ARCNETPLUS                = 0x24

	Remote []byte
	Dev    string
	raw    RawSockaddrPPPoX
}

func (sa *SockaddrPPPoE) sockaddr() (unsafe.Pointer, _Socklen, error) {
	if len(sa.Remote) != 6 {
		return nil, 0, EINVAL
	}
	if len(sa.Dev) > IFNAMSIZ-1 {
		return nil, 0, EINVAL
	}

	*(*uint16)(unsafe.Pointer(&sa.raw[0])) = AF_PPPOX
	// This next field is in host-endian byte order. We can't use the
	// same unsafe pointer cast as above, because this value is not

	IFF_SNAP                      = 0x8000
	IFF_TCP_DISABLE_CKSUM         = 0x20000000
	IFF_TCP_NOCKSUM               = 0x1000000
	IFF_UP                        = 0x1
	IFF_VIPA                      = 0x80000000
	IFNAMSIZ                      = 0x10
	IFO_FLUSH                     = 0x1
	IFT_1822                      = 0x2
	IFT_AAL5                      = 0x31
	IFT_ARCNET                    = 0x23
	IFT_ARCNETPLUS                = 0x24