// 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 }