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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)
- }
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