74 lines
1.8 KiB
Go
74 lines
1.8 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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// +build darwin freebsd linux netbsd openbsd windows
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package net
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import (
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"os"
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"syscall"
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)
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func joinIPv4Group(fd *netFD, ifi *Interface, ip IP) error {
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mreq := &syscall.IPMreq{Multiaddr: [4]byte{ip[0], ip[1], ip[2], ip[3]}}
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if err := setIPv4MreqToInterface(mreq, ifi); err != nil {
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return err
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}
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if err := fd.incref(false); err != nil {
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return err
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}
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defer fd.decref()
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err := syscall.SetsockoptIPMreq(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_ADD_MEMBERSHIP, mreq)
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if err != nil {
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return os.NewSyscallError("setsockopt", err)
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}
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return nil
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}
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func setIPv6MulticastInterface(fd *netFD, ifi *Interface) error {
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var v int
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if ifi != nil {
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v = ifi.Index
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}
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if err := fd.incref(false); err != nil {
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return err
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}
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defer fd.decref()
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err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_MULTICAST_IF, v)
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if err != nil {
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return os.NewSyscallError("setsockopt", err)
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}
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return nil
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}
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func setIPv6MulticastLoopback(fd *netFD, v bool) error {
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if err := fd.incref(false); err != nil {
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return err
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}
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defer fd.decref()
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err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_MULTICAST_LOOP, boolint(v))
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if err != nil {
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return os.NewSyscallError("setsockopt", err)
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}
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return nil
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}
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func joinIPv6Group(fd *netFD, ifi *Interface, ip IP) error {
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mreq := &syscall.IPv6Mreq{}
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copy(mreq.Multiaddr[:], ip)
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if ifi != nil {
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mreq.Interface = uint32(ifi.Index)
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}
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if err := fd.incref(false); err != nil {
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return err
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}
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defer fd.decref()
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err := syscall.SetsockoptIPv6Mreq(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_JOIN_GROUP, mreq)
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if err != nil {
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return os.NewSyscallError("setsockopt", err)
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}
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return nil
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}
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