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.
5 // +build darwin dragonfly freebsd linux nacl netbsd openbsd windows
14 func joinIPv4Group(fd
*netFD
, ifi
*Interface
, ip IP
) error
{
15 mreq
:= &syscall
.IPMreq
{Multiaddr
: [4]byte{ip
[0], ip
[1], ip
[2], ip
[3]}}
16 if err
:= setIPv4MreqToInterface(mreq
, ifi
); err
!= nil {
19 if err
:= fd
.incref(); err
!= nil {
23 return os
.NewSyscallError("setsockopt", syscall
.SetsockoptIPMreq(fd
.sysfd
, syscall
.IPPROTO_IP
, syscall
.IP_ADD_MEMBERSHIP
, mreq
))
26 func setIPv6MulticastInterface(fd
*netFD
, ifi
*Interface
) error
{
31 if err
:= fd
.incref(); err
!= nil {
35 return os
.NewSyscallError("setsockopt", syscall
.SetsockoptInt(fd
.sysfd
, syscall
.IPPROTO_IPV6
, syscall
.IPV6_MULTICAST_IF
, v
))
38 func setIPv6MulticastLoopback(fd
*netFD
, v
bool) error
{
39 if err
:= fd
.incref(); err
!= nil {
43 return os
.NewSyscallError("setsockopt", syscall
.SetsockoptInt(fd
.sysfd
, syscall
.IPPROTO_IPV6
, syscall
.IPV6_MULTICAST_LOOP
, boolint(v
)))
46 func joinIPv6Group(fd
*netFD
, ifi
*Interface
, ip IP
) error
{
47 mreq
:= &syscall
.IPv6Mreq
{}
48 copy(mreq
.Multiaddr
[:], ip
)
50 mreq
.Interface
= uint32(ifi
.Index
)
52 if err
:= fd
.incref(); err
!= nil {
56 return os
.NewSyscallError("setsockopt", syscall
.SetsockoptIPv6Mreq(fd
.sysfd
, syscall
.IPPROTO_IPV6
, syscall
.IPV6_JOIN_GROUP
, mreq
))