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- // Copyright 2011 The Go Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style
- // license that can be found in the LICENSE file.
- 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.
- func interfaceMulticastAddrTable(ifi *Interface) ([]Addr, error) {
- 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
- switch sa := m.Addrs[syscall.RTAX_IFA].(type) {
- case *route.Inet4Addr:
- ip = IPv4(sa.IP[0], sa.IP[1], sa.IP[2], sa.IP[3])
- case *route.Inet6Addr:
- ip = make(IP, IPv6len)
- copy(ip, sa.IP[:])
- }
- if ip != nil {
- ifmat = append(ifmat, &IPAddr{IP: ip})
- }
- }
- }
- return ifmat, nil
- }
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