}
	_, _, ep = Syscall(SYS_IOCTL, uintptr(s), SIOCSIFFLAGS, uintptr(unsafe.Pointer(&ifl)))
	if ep != 0 {
		return Errno(ep)
	}
	return nil
}

// Deprecated: Use golang.org/x/net/bpf instead.
func AttachLsf(fd int, i []SockFilter) error {
	var p SockFprog
	p.Len = uint16(len(i))
	p.Filter = (*SockFilter)(unsafe.Pointer(&i[0]))
	return setsockopt(fd, SOL_SOCKET, SO_ATTACH_FILTER, unsafe.Pointer(&p), unsafe.Sizeof(p))
}