// network interfaces. Otherwise it returns a mapping of a specific
// interface.
func interfaceTable(ifindex int) ([]Interface, error) {
	tab, err := syscall.NetlinkRIB(syscall.RTM_GETLINK, syscall.AF_UNSPEC)
	if err != nil {
		return nil, os.NewSyscallError("netlinkrib", err)
	}
	msgs, err := syscall.ParseNetlinkMessage(tab)
	if err != nil {
		return nil, os.NewSyscallError("parsenetlinkmessage", err)
	}
	var ift []Interface

	return rr.toWireFormat()
}

var pageBufPool = &sync.Pool{New: func() any {
	b := make([]byte, Getpagesize())
	return &b
}}

// NetlinkRIB returns routing information base, as known as RIB, which
// consists of network facility information, states and parameters.
func NetlinkRIB(proto, family int) ([]byte, error) {
	s, err := Socket(AF_NETLINK, SOCK_RAW|SOCK_CLOEXEC, NETLINK_ROUTE)
	if err != nil {
		return nil, err
	}

pkg syscall (linux-386), func Munlockall() error
pkg syscall (linux-386), func Munmap([]uint8) error
pkg syscall (linux-386), func Nanosleep(*Timespec, *Timespec) error
pkg syscall (linux-386), func NetlinkRIB(int, int) ([]uint8, error)
pkg syscall (linux-386), func NsecToTimespec(int64) Timespec
pkg syscall (linux-386), func Open(string, int, uint32) (int, error)

		{"NetSetupWorkgroupName", Const, 2},
		{"NetUserGetInfo", Func, 0},
		{"NetlinkMessage", Type, 0},
		{"NetlinkMessage.Data", Field, 0},
		{"NetlinkMessage.Header", Field, 0},
		{"NetlinkRIB", Func, 0},
		{"NetlinkRouteAttr", Type, 0},
		{"NetlinkRouteAttr.Attr", Field, 0},
		{"NetlinkRouteAttr.Value", Field, 0},
		{"NetlinkRouteRequest", Type, 0},
		{"NetlinkRouteRequest.Data", Field, 0},

pkg syscall (linux-arm-cgo), func Munlockall() error
pkg syscall (linux-arm-cgo), func Munmap([]uint8) error
pkg syscall (linux-arm-cgo), func Nanosleep(*Timespec, *Timespec) error
pkg syscall (linux-arm-cgo), func NetlinkRIB(int, int) ([]uint8, error)
pkg syscall (linux-arm-cgo), func Open(string, int, uint32) (int, error)
pkg syscall (linux-arm-cgo), func Openat(int, string, int, uint32) (int, error)