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/*
* Copyright (c) 2001-2018 The strace developers.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "defs.h"
#include <net/if.h>
#ifdef HAVE_IF_INDEXTONAME
# include "xstring.h"
# define INI_PFX "if_nametoindex(\""
# define INI_SFX "\")"
# define IFNAME_QUOTED_SZ (sizeof(IFNAMSIZ) * 4 + 3)
const char *
get_ifname(const unsigned int ifindex)
{
static char name_quoted_buf[IFNAME_QUOTED_SZ];
char name_buf[IFNAMSIZ];
if (!if_indextoname(ifindex, name_buf))
return NULL;
if (string_quote(name_buf, name_quoted_buf, sizeof(name_buf),
QUOTE_0_TERMINATED | QUOTE_OMIT_LEADING_TRAILING_QUOTES,
NULL))
return NULL;
return name_quoted_buf;
}
static const char *
sprint_ifname(const unsigned int ifindex)
{
static char res[IFNAME_QUOTED_SZ + sizeof(INI_PFX INI_SFX)];
const char *name_quoted = get_ifname(ifindex);
if (!name_quoted)
return NULL;
xsprintf(res, INI_PFX "%s" INI_SFX, name_quoted);
return res;
}
#else /* !HAVE_IF_INDEXTONAME */
const char *get_ifname(const unsigned int ifindex) { return NULL; }
#endif /* HAVE_IF_INDEXTONAME */
void
print_ifindex(const unsigned int ifindex)
{
#ifdef HAVE_IF_INDEXTONAME
print_xlat_ex(ifindex, sprint_ifname(ifindex), XLAT_STYLE_FMT_U);
#else
tprintf("%u", ifindex);
#endif
}
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