1  /*
       2   * Proxy wrappers for if_nametoindex.
       3   *
       4   * Copyright (c) 2017-2018 The strace developers.
       5   * All rights reserved.
       6   *
       7   * SPDX-License-Identifier: GPL-2.0-or-later
       8   */
       9  
      10  #include "tests.h"
      11  
      12  #ifdef HAVE_IF_INDEXTONAME
      13  
      14  # include <net/if.h>
      15  
      16  unsigned int
      17  ifindex_lo(void)
      18  {
      19  	static unsigned int index;
      20  
      21  	if (!index)
      22  		index = if_nametoindex("lo");
      23  
      24  	return index;
      25  }
      26  
      27  #else /* !HAVE_IF_INDEXTONAME */
      28  
      29  unsigned int
      30  ifindex_lo(void)
      31  {
      32  	return 1;
      33  }
      34  
      35  #endif