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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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