rib, err := route.FetchRIB(syscall.AF_UNSPEC, syscall.NET_RT_IFLIST, ifindex)
	if err != nil {
		return nil, err
	}
	return route.ParseRIB(syscall.NET_RT_IFLIST, rib)
}

// interfaceMulticastAddrTable returns addresses for a specific
// interface.
func interfaceMulticastAddrTable(ifi *Interface) ([]Addr, error) {
	rib, err := route.FetchRIB(syscall.AF_UNSPEC, syscall.NET_RT_IFLIST2, ifi.Index)
	if err != nil {

	rib, err := route.FetchRIB(syscall.AF_UNSPEC, route.RIBTypeInterface, ifindex)
	if err != nil {
		return nil, err
	}
	return route.ParseRIB(route.RIBTypeInterface, rib)
}

// interfaceMulticastAddrTable returns addresses for a specific
// interface.
func interfaceMulticastAddrTable(ifi *Interface) ([]Addr, error) {
	rib, err := route.FetchRIB(syscall.AF_UNSPEC, syscall.NET_RT_IFMALIST, ifi.Index)
	if err != nil {

// network interfaces. Otherwise it returns a mapping of a specific
// interface.
func interfaceTable(ifindex int) ([]Interface, error) {
	lls, err := lif.Links(syscall.AF_UNSPEC, "")
	if err != nil {
		return nil, err
	}
	var ift []Interface
	for _, ll := range lls {
		if ifindex != 0 && ifindex != ll.Index {
			continue
		}

//go:build dragonfly || netbsd || openbsd

package net

import (
	"syscall"

	"golang.org/x/net/route"
)

func interfaceMessages(ifindex int) ([]route.Message, error) {
	rib, err := route.FetchRIB(syscall.AF_UNSPEC, syscall.NET_RT_IFLIST, ifindex)
	if err != nil {
		return nil, err
	}
	return route.ParseRIB(syscall.NET_RT_IFLIST, rib)
}

// interfaceMulticastAddrTable returns addresses for a specific
// interface.

	return syscall.Close(int(ep.s))
}

func newEndpoints(af int) ([]endpoint, error) {
	var lastErr error
	var eps []endpoint
	afs := []int{syscall.AF_INET, syscall.AF_INET6}
	if af != syscall.AF_UNSPEC {
		afs = []int{af}
	}
	for _, af := range afs {
		s, err := syscall.Socket(af, syscall.SOCK_DGRAM, 0)
		if err != nil {
			lastErr = err
			continue
		}
		eps = append(eps, endpoint{af: af, s: uintptr(s)})

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Fake networking for js/wasm and wasip1/wasm.

//go:build js || wasip1

package syscall

const (
	AF_UNSPEC = iota
	AF_UNIX
	AF_INET
	AF_INET6
)

const (
	SOCK_STREAM = 1 + iota
	SOCK_DGRAM
	SOCK_RAW
	SOCK_SEQPACKET
)

const (
	IPPROTO_IP   = 0
	IPPROTO_IPV4 = 4
	IPPROTO_IPV6 = 0x29

			copy(sa.Addr[:], b[l-offsetofInet6:l])
		}
		return sa, nil
	case b[0] == SizeofSockaddrInet4:
		sa := &SockaddrInet4{}
		copy(sa.Addr[:], b[offsetofInet4:])
		return sa, nil
	default: // an old fashion, AF_UNSPEC or unknown means AF_INET
		sa := &SockaddrInet4{}
		if l-1 < offsetofInet4 {
			copy(sa.Addr[:], b[1:l])
		} else {
			copy(sa.Addr[:], b[l-offsetofInet4:l])
		}
		return sa, nil
	}
}

package net

import (
	"internal/syscall/unix"
	"runtime"
	"syscall"
	"unsafe"
)

const (
	_C_AF_INET      = syscall.AF_INET
	_C_AF_INET6     = syscall.AF_INET6
	_C_AF_UNSPEC    = syscall.AF_UNSPEC
	_C_EAI_AGAIN    = unix.EAI_AGAIN
	_C_EAI_NONAME   = unix.EAI_NONAME
	_C_EAI_SERVICE  = unix.EAI_SERVICE
	_C_EAI_NODATA   = unix.EAI_NODATA
	_C_EAI_OVERFLOW = unix.EAI_OVERFLOW
	_C_EAI_SYSTEM   = unix.EAI_SYSTEM

#ifndef EAI_OVERFLOW
#define EAI_OVERFLOW -12
#endif
*/
import "C"
import "unsafe"

const (
	_C_AF_INET      = C.AF_INET
	_C_AF_INET6     = C.AF_INET6
	_C_AF_UNSPEC    = C.AF_UNSPEC
	_C_EAI_AGAIN    = C.EAI_AGAIN
	_C_EAI_NODATA   = C.EAI_NODATA
	_C_EAI_NONAME   = C.EAI_NONAME
	_C_EAI_SERVICE  = C.EAI_SERVICE
	_C_EAI_OVERFLOW = C.EAI_OVERFLOW
	_C_EAI_SYSTEM   = C.EAI_SYSTEM

// 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)
	}