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/* Test of <net/if.h> functions.
Copyright (C) 2010-2022 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* Written by Simon Josefsson <simon@josefsson.org>, 2010. */
#include <config.h>
#include <net/if.h>
/* We do not yet have replacements for if_* functions on systems that
lack a native <net/if.h>. */
#if HAVE_NET_IF_H && HAVE_IF_NAMEINDEX
# include "signature.h"
SIGNATURE_CHECK (if_freenameindex, void, (struct if_nameindex *));
SIGNATURE_CHECK (if_indextoname, char *, (unsigned int, char *));
SIGNATURE_CHECK (if_nameindex, struct if_nameindex *, (void));
SIGNATURE_CHECK (if_nametoindex, unsigned int, (const char *));
#endif
#include <stddef.h> /* NULL */
#include <stdio.h> /* fprintf */
int
main (int argc, char *argv[])
{
#if HAVE_NET_IF_H && HAVE_IF_NAMEINDEX
struct if_nameindex *ifnp, *p;
p = ifnp = if_nameindex ();
if (ifnp == NULL)
{
fputs ("if_nameindex returned NULL\n", stderr);
return 1;
}
while (p->if_index)
{
unsigned int idx;
char buf[IF_NAMESIZE];
char *q;
if (argc > 1)
printf ("index %d name %s\n", p->if_index, p->if_name);
idx = if_nametoindex (p->if_name);
if (idx != p->if_index)
{
fprintf (stderr, "if_nametoindex (%s) = %d != %d\n",
p->if_name, idx, p->if_index);
return 1;
}
q = if_indextoname (p->if_index, buf);
if (q == NULL)
{
fprintf (stderr, "if_indextoname (%d) returned NULL\n", p->if_index);
return 1;
}
if (q != buf)
{
fprintf (stderr, "if_indextoname (%d) buffer mismatch?\n",
p->if_index);
return 1;
}
if (strcmp (p->if_name, q) != 0)
{
fprintf (stderr, "if_indextoname (%s) = %s ?!\n", p->if_name, q);
return 1;
}
p++;
}
if_freenameindex (ifnp);
#endif /* HAVE_NET_IF_H */
#if !HAVE_NET_IF_H || HAVE_IF_NAMEINDEX
{
static struct if_nameindex ni;
return !IF_NAMESIZE + ni.if_index + !!ni.if_name;
}
#else
return 0;
#endif
}
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