1// Copyright 2011 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5// +build aix darwin dragonfly freebsd hurd netbsd openbsd solaris
6
7package net
8
9import (
10	"runtime"
11	"syscall"
12)
13
14func setIPv4MulticastInterface(fd *netFD, ifi *Interface) error {
15	ip, err := interfaceToIPv4Addr(ifi)
16	if err != nil {
17		return wrapSyscallError("setsockopt", err)
18	}
19	var a [4]byte
20	copy(a[:], ip.To4())
21	err = fd.pfd.SetsockoptInet4Addr(syscall.IPPROTO_IP, syscall.IP_MULTICAST_IF, a)
22	runtime.KeepAlive(fd)
23	return wrapSyscallError("setsockopt", err)
24}
25
26func setIPv4MulticastLoopback(fd *netFD, v bool) error {
27	err := fd.pfd.SetsockoptByte(syscall.IPPROTO_IP, syscall.IP_MULTICAST_LOOP, byte(boolint(v)))
28	runtime.KeepAlive(fd)
29	return wrapSyscallError("setsockopt", err)
30}
31