aas, err := adapterAddresses()
	if err != nil {
		return nil, err
	}
	var ifat []Addr
	for _, aa := range aas {
		index := aa.IfIndex
		if index == 0 { // ipv6IfIndex is a substitute for ifIndex
			index = aa.Ipv6IfIndex
		}
		if ifi == nil || ifi.Index == int(index) {
			for puni := aa.FirstUnicastAddress; puni != nil; puni = puni.Next {
				sa, err := puni.Address.Sockaddr.Sockaddr()
				if err != nil {

		ifm := (*syscall.IfMsgHdr)(unsafe.Pointer(&tab[0]))
		if ifm.Msglen == 0 {
			break
		}
		if ifm.Type == syscall.RTM_IFINFO {
			if ifindex == 0 || ifindex == int(ifm.Index) {
				sdl := (*rawSockaddrDatalink)(unsafe.Pointer(&tab[syscall.SizeofIfMsghdr]))

				ifi := &Interface{Index: int(ifm.Index), Flags: linkFlags(ifm.Flags)}
				ifi.Name = string(sdl.Data[:sdl.Nlen])
				ifi.HardwareAddr = sdl.Data[sdl.Nlen : sdl.Nlen+sdl.Alen]

// interface.
func interfaceAddrTable(ifi *Interface) ([]Addr, error) {
	index := 0
	if ifi != nil {
		index = ifi.Index
	}
	msgs, err := interfaceMessages(index)
	if err != nil {
		return nil, err
	}
	ifat := make([]Addr, 0, len(msgs))
	for _, m := range msgs {
		switch m := m.(type) {
		case *route.InterfaceAddrMessage:
			if index != 0 && index != m.Index {
				continue
			}
			var mask IPMask

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

// If the ifindex is zero, interfaceTable returns mappings of all
// 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

}

type Cmsghdr struct {
	Len   uint64
	Level int32
	Type  int32
}

type Inet4Pktinfo struct {
	Ifindex  int32
	Spec_dst [4]byte /* in_addr */
	Addr     [4]byte /* in_addr */
}

type Inet6Pktinfo struct {
	Addr    [16]byte /* in6_addr */
	Ifindex uint32
}

type IPv6MTUInfo struct {
	Addr RawSockaddrInet6
	Mtu  uint32
}

type ICMPv6Filter struct {

}

type Cmsghdr struct {
	Len   uint64
	Level int32
	Type  int32
}

type Inet4Pktinfo struct {
	Ifindex  int32
	Spec_dst [4]byte /* in_addr */
	Addr     [4]byte /* in_addr */
}

type Inet6Pktinfo struct {
	Addr    [16]byte /* in6_addr */
	Ifindex uint32
}

type IPv6MTUInfo struct {
	Addr RawSockaddrInet6
	Mtu  uint32
}

type ICMPv6Filter struct {

package net

import (
	"errors"
	"internal/itoa"
	"internal/stringslite"
	"os"
)

// If the ifindex is zero, interfaceTable returns mappings of all
// network interfaces. Otherwise it returns a mapping of a specific
// interface.
func interfaceTable(ifindex int) ([]Interface, error) {
	if ifindex == 0 {
		n, err := interfaceCount()
		if err != nil {
			return nil, err
		}
		ifcs := make([]Interface, n)

	rib, err := route.FetchRIB(syscall.AF_UNSPEC, syscall.NET_RT_IFLIST2, ifi.Index)
	if err != nil {
		return nil, err
	}
	msgs, err := route.ParseRIB(syscall.NET_RT_IFLIST2, rib)
	if err != nil {
		return nil, err
	}
	ifmat := make([]Addr, 0, len(msgs))
	for _, m := range msgs {
		switch m := m.(type) {
		case *route.InterfaceMulticastAddrMessage:
			if ifi.Index != m.Index {
				continue
			}
			var ip IP

// license that can be found in the LICENSE file.

//go:build js || wasip1

package net

// If the ifindex is zero, interfaceTable returns mappings of all
// network interfaces. Otherwise it returns a mapping of a specific
// interface.
func interfaceTable(ifindex int) ([]Interface, error) {
	return nil, nil
}

// If the ifi is nil, interfaceAddrTable returns addresses for all