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))