Type:    int(b[3]),
		Flags:   int(nativeEndian.Uint32(b[16:20])),
		Index:   int(nativeEndian.Uint16(b[6:8])),
		ID:      uintptr(nativeEndian.Uint32(b[24:28])),
		Seq:     int(nativeEndian.Uint32(b[28:32])),
		raw:     b[:l],
	}
	ll := int(nativeEndian.Uint16(b[4:6]))
	if len(b) < ll {
		return nil, errInvalidMessage
	}
	errno := syscall.Errno(nativeEndian.Uint32(b[32:36]))
	if errno != 0 {
		m.Err = errno
	}

		return nil, errMessageTooShort
	}
	l := int(nativeEndian.Uint16(b[:2]))
	if len(b) < l {
		return nil, errInvalidMessage
	}
	m := &InterfaceAddrMessage{
		Version: int(b[2]),
		Type:    int(b[3]),
		Flags:   int(nativeEndian.Uint32(b[8:12])),
		raw:     b[:l],
	}
	if runtime.GOOS == "netbsd" {
		m.Index = int(nativeEndian.Uint16(b[16:18]))
	} else {
		m.Index = int(nativeEndian.Uint16(b[12:14]))
	}
	var err error

		return nil, errMessageTooShort
	}
	l := int(nativeEndian.Uint16(b[:2]))
	if len(b) < l {
		return nil, errInvalidMessage
	}
	attrs := uint(nativeEndian.Uint32(b[12:16]))
	if attrs&syscall.RTA_IFP == 0 {
		return nil, nil
	}
	m := &InterfaceMessage{
		Version: int(b[2]),
		Type:    int(b[3]),
		Flags:   int(nativeEndian.Uint32(b[16:20])),
		Index:   int(nativeEndian.Uint16(b[6:8])),
		Addrs:   make([]Addr, syscall.RTAX_MAX),

		Flags:   int(nativeEndian.Uint32(b[8:12])),
		Index:   int(nativeEndian.Uint16(b[4:6])),
		ID:      uintptr(nativeEndian.Uint32(b[16:20])),
		Seq:     int(nativeEndian.Uint32(b[20:24])),
		extOff:  w.extOff,
		raw:     b[:l],
	}
	errno := syscall.Errno(nativeEndian.Uint32(b[28:32]))
	if errno != 0 {
		m.Err = errno
	}
	var err error

		}
		extOff = int(nativeEndian.Uint16(b[18:20]))
		bodyOff = int(nativeEndian.Uint16(b[16:18]))
	} else {
		extOff = w.extOff
		bodyOff = w.bodyOff
	}
	if len(b) < extOff || len(b) < bodyOff {
		return nil, errInvalidMessage
	}
	l := int(nativeEndian.Uint16(b[:2]))
	if len(b) < l {
		return nil, errInvalidMessage
	}
	attrs := uint(nativeEndian.Uint32(b[4:8]))
	if attrs&syscall.RTA_IFP == 0 {

package binary

type nativeEndian struct {
	littleEndian
}

// NativeEndian is the native-endian implementation of [ByteOrder] and [AppendByteOrder].

		ll.Index = int(nativeEndian.Uint32(lifr.Lifru[:4]))
	}
	ioc = int64(syscall.SIOCGLIFFLAGS)
	if err := ioctl(s, uintptr(ioc), unsafe.Pointer(&lifr)); err == nil {
		ll.Flags = int(nativeEndian.Uint64(lifr.Lifru[:8]))
	}
	ioc = int64(syscall.SIOCGLIFMTU)
	if err := ioctl(s, uintptr(ioc), unsafe.Pointer(&lifr)); err == nil {
		ll.MTU = int(nativeEndian.Uint32(lifr.Lifru[:4]))
	}
	switch ll.Type {

//go:build armbe || arm64be || m68k || mips || mips64 || mips64p32 || ppc || ppc64 || s390 || s390x || shbe || sparc || sparc64

package binary

type nativeEndian struct {
	bigEndian
}

// NativeEndian is the native-endian implementation of [ByteOrder] and [AppendByteOrder].

		return nil, errMessageTooShort
	}
	l := int(nativeEndian.Uint16(b[:2]))
	if len(b) < l {
		return nil, errInvalidMessage
	}
	m := &InterfaceMulticastAddrMessage{
		Version: int(b[2]),
		Type:    int(b[3]),
		Flags:   int(nativeEndian.Uint32(b[8:12])),
		Index:   int(nativeEndian.Uint16(b[12:14])),
		raw:     b[:l],
	}
	var err error
	m.Addrs, err = parseAddrs(uint(nativeEndian.Uint32(b[4:8])), parseKernelInetAddr, b[w.bodyOff:])

package route

import (
	"syscall"
	"unsafe"
)

var (
	nativeEndian binaryByteOrder
	kernelAlign  int
	rtmVersion   byte
	wireFormats  map[int]*wireFormat
)

func init() {
	i := uint32(1)
	b := (*[4]byte)(unsafe.Pointer(&i))
	if b[0] == 1 {
		nativeEndian = littleEndian
	} else {
		nativeEndian = bigEndian
	}
	// might get overridden in probeRoutingStack