granicus.if.org Git - strace/blob - tests/ifindex.c

   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