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