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      1 // Copyright 2015 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 // +build freebsd linux
      6 
      7 package net
      8 
      9 func init() {
     10 	extraTestHookInstallers = append(extraTestHookInstallers, installAccept4TestHook)
     11 	extraTestHookUninstallers = append(extraTestHookUninstallers, uninstallAccept4TestHook)
     12 }
     13 
     14 var (
     15 	// Placeholders for saving original socket system calls.
     16 	origAccept4 = accept4Func
     17 )
     18 
     19 func installAccept4TestHook() {
     20 	accept4Func = sw.Accept4
     21 }
     22 
     23 func uninstallAccept4TestHook() {
     24 	accept4Func = origAccept4
     25 }
     26