root/maint/gnulib/tests/test-net_if.c

/* */

DEFINITIONS

1. main

   1 /* Test of <net/if.h> functions.
   2    Copyright (C) 2010-2021 Free Software Foundation, Inc.
   3 
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 3 of the License, or
   7    (at your option) any later version.
   8 
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13 
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16 
  17 /* Written by Simon Josefsson <simon@josefsson.org>, 2010.  */
  18 
  19 #include <config.h>
  20 
  21 #include <net/if.h>
  22 
  23 /* We do not yet have replacements for if_* functions on systems that
  24    lack a native <net/if.h>.  */
  25 #if HAVE_NET_IF_H && HAVE_IF_NAMEINDEX
  26 # include "signature.h"
  27 SIGNATURE_CHECK (if_freenameindex, void, (struct if_nameindex *));
  28 SIGNATURE_CHECK (if_indextoname, char *, (unsigned int, char *));
  29 SIGNATURE_CHECK (if_nameindex, struct if_nameindex *, (void));
  30 SIGNATURE_CHECK (if_nametoindex, unsigned int, (const char *));
  31 #endif
  32 
  33 #include <stddef.h> /* NULL */
  34 #include <stdio.h> /* fprintf */
  35 
  36 int
  37 main (int argc, char *argv[])
     /*  */
  38 {
  39 #if HAVE_NET_IF_H && HAVE_IF_NAMEINDEX
  40   struct if_nameindex *ifnp, *p;
  41 
  42   p = ifnp = if_nameindex ();
  43   if (ifnp == NULL)
  44     {
  45       fputs ("if_nameindex returned NULL\n", stderr);
  46       return 1;
  47     }
  48 
  49   while (p->if_index)
  50     {
  51       unsigned int idx;
  52       char buf[IF_NAMESIZE];
  53       char *q;
  54 
  55       if (argc > 1)
  56         printf ("index %d name %s\n", p->if_index, p->if_name);
  57 
  58       idx = if_nametoindex (p->if_name);
  59       if (idx != p->if_index)
  60         {
  61           fprintf (stderr, "if_nametoindex (%s) = %d != %d\n",
  62                    p->if_name, idx, p->if_index);
  63           return 1;
  64         }
  65 
  66       q = if_indextoname (p->if_index, buf);
  67       if (q == NULL)
  68         {
  69           fprintf (stderr, "if_indextoname (%d) returned NULL\n", p->if_index);
  70           return 1;
  71         }
  72       if (q != buf)
  73         {
  74           fprintf (stderr, "if_indextoname (%d) buffer mismatch?\n",
  75                    p->if_index);
  76           return 1;
  77         }
  78       if (strcmp (p->if_name, q) != 0)
  79         {
  80           fprintf (stderr, "if_indextoname (%s) = %s ?!\n", p->if_name, q);
  81           return 1;
  82         }
  83 
  84       p++;
  85     }
  86 
  87   if_freenameindex (ifnp);
  88 #endif /* HAVE_NET_IF_H */
  89 
  90 #if !HAVE_NET_IF_H || HAVE_IF_NAMEINDEX
  91   {
  92     static struct if_nameindex ni;
  93     return !IF_NAMESIZE + ni.if_index + !!ni.if_name;
  94   }
  95 #else
  96   return 0;
  97 #endif
  98 }

/* */