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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 (
"internal/routebsd"
"syscall"
)
func interfaceMessages(ifindex int) ([]routebsd.Message, error) {
return routebsd.FetchRIBMessages(syscall.NET_RT_IFLIST, ifindex)
}
// interfaceMulticastAddrTable returns addresses for a specific
// interface.
func interfaceMulticastAddrTable(ifi *Interface) ([]Addr, error) {
msgs, err := routebsd.FetchRIBMessages(syscall.NET_RT_IFLIST2, ifi.Index)
if err != nil {
return nil, err
}
ifmat := make([]Addr, 0, len(msgs))
for _, m := range msgs {
switch m := m.(type) {
case *routebsd.InterfaceMulticastAddrMessage:
if ifi.Index != m.Index {
continue
}
var ip IP
switch sa := m.Addrs[syscall.RTAX_IFA].(type) {
case *routebsd.InetAddr:
if sa.IP.Is4() {
a := sa.IP.As4()
ip = IPv4(a[0], a[1], a[2], a[3])
} else if sa.IP.Is6() {
a := sa.IP.As16()
ip = make(IP, IPv6len)
copy(ip, a[:])
}
}
if ip != nil {
ifmat = append(ifmat, &IPAddr{IP: ip})
}
}
}
return ifmat, nil
}
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