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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 (
- "runtime"
- "syscall"
- )
- func setIPv4MulticastInterface(fd *netFD, ifi *Interface) error {
- var v int32
- if ifi != nil {
- v = int32(ifi.Index)
- }
- mreq := &syscall.IPMreqn{Ifindex: v}
- err := fd.pfd.SetsockoptIPMreqn(syscall.IPPROTO_IP, syscall.IP_MULTICAST_IF, mreq)
- 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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