sockoptip4_windows.mx raw

   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.
   4  
   5  package net
   6  
   7  import (
   8  	"os"
   9  	"runtime"
  10  	"syscall"
  11  )
  12  
  13  func setIPv4MulticastInterface(fd *netFD, ifi *Interface) error {
  14  	ip, err := interfaceToIPv4Addr(ifi)
  15  	if err != nil {
  16  		return os.NewSyscallError("setsockopt", err)
  17  	}
  18  	var a [4]byte
  19  	copy(a[:], ip.To4())
  20  	err = fd.pfd.SetsockoptInet4Addr(syscall.IPPROTO_IP, syscall.IP_MULTICAST_IF, a)
  21  	runtime.KeepAlive(fd)
  22  	return wrapSyscallError("setsockopt", err)
  23  }
  24  
  25  func setIPv4MulticastLoopback(fd *netFD, v bool) error {
  26  	err := fd.pfd.SetsockoptInt(syscall.IPPROTO_IP, syscall.IP_MULTICAST_LOOP, boolint(v))
  27  	runtime.KeepAlive(fd)
  28  	return wrapSyscallError("setsockopt", err)
  29  }
  30