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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 (
| "os"
| "runtime"
| "syscall"
| "unsafe"
| )
|
| func setIPv4MulticastInterface(fd *netFD, ifi *Interface) error {
| ip, err := interfaceToIPv4Addr(ifi)
| if err != nil {
| return os.NewSyscallError("setsockopt", err)
| }
| var a [4]byte
| copy(a[:], ip.To4())
| err = fd.pfd.Setsockopt(syscall.IPPROTO_IP, syscall.IP_MULTICAST_IF, (*byte)(unsafe.Pointer(&a[0])), 4)
| runtime.KeepAlive(fd)
| return wrapSyscallError("setsockopt", err)
| }
|
| func setIPv4MulticastLoopback(fd *netFD, v bool) error {
| err := fd.pfd.SetsockoptInt(syscall.IPPROTO_IP, syscall.IP_MULTICAST_LOOP, boolint(v))
| runtime.KeepAlive(fd)
| return wrapSyscallError("setsockopt", err)
| }
|
|
