59 lines
1.4 KiB
Go
59 lines
1.4 KiB
Go
// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package net
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import (
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"syscall"
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"golang_org/x/net/route"
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)
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func interfaceMessages(ifindex int) ([]route.Message, error) {
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typ := route.RIBType(syscall.NET_RT_IFLISTL)
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rib, err := route.FetchRIB(syscall.AF_UNSPEC, typ, ifindex)
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if err != nil {
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typ = route.RIBType(syscall.NET_RT_IFLIST)
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rib, err = route.FetchRIB(syscall.AF_UNSPEC, typ, ifindex)
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}
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if err != nil {
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return nil, err
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}
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return route.ParseRIB(typ, rib)
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}
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// interfaceMulticastAddrTable returns addresses for a specific
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// interface.
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func interfaceMulticastAddrTable(ifi *Interface) ([]Addr, error) {
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rib, err := route.FetchRIB(syscall.AF_UNSPEC, syscall.NET_RT_IFMALIST, ifi.Index)
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if err != nil {
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return nil, err
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}
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msgs, err := route.ParseRIB(syscall.NET_RT_IFMALIST, rib)
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if err != nil {
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return nil, err
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}
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ifmat := make([]Addr, 0, len(msgs))
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for _, m := range msgs {
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switch m := m.(type) {
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case *route.InterfaceMulticastAddrMessage:
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if ifi.Index != m.Index {
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continue
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}
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var ip IP
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switch sa := m.Addrs[syscall.RTAX_IFA].(type) {
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case *route.Inet4Addr:
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ip = IPv4(sa.IP[0], sa.IP[1], sa.IP[2], sa.IP[3])
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case *route.Inet6Addr:
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ip = make(IP, IPv6len)
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copy(ip, sa.IP[:])
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}
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if ip != nil {
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ifmat = append(ifmat, &IPAddr{IP: ip})
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}
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}
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}
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return ifmat, nil
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}
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