GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libc/net/if_nametoindex.c Lines: 0 10 0.0 %
Date: 2017-11-13 Branches: 0 6 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: if_nametoindex.c,v 1.10 2015/10/23 13:09:19 claudio Exp $	*/
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/*	$KAME: if_nametoindex.c,v 1.5 2000/11/24 08:04:40 itojun Exp $	*/
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/*-
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 * Copyright (c) 2015 Claudio Jeker <claudio@openbsd.org>
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 * Copyright (c) 1997, 2000
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 *	Berkeley Software Design, Inc.  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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 *
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 * THIS SOFTWARE IS PROVIDED BY Berkeley Software Design, Inc. ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL Berkeley Software Design, Inc. BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 *
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 *	BSDI Id: if_nametoindex.c,v 2.3 2000/04/17 22:38:05 dab Exp
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 */
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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/*
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 * From RFC 2553:
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 *
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 * 4.1 Name-to-Index
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 *
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 *
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 *    The first function maps an interface name into its corresponding
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 *    index.
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 *
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 *       #include <net/if.h>
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 *
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 *       unsigned int  if_nametoindex(const char *ifname);
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 *
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 *    If the specified interface name does not exist, the return value is
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 *    0, and errno is set to ENXIO.  If there was a system error (such as
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 *    running out of memory), the return value is 0 and errno is set to the
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 *    proper value (e.g., ENOMEM).
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 */
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unsigned int
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if_nametoindex(const char *ifname)
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{
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	struct if_nameindex *ifni, *ifni2;
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	unsigned int index;
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	if ((ifni = if_nameindex()) == NULL)
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		return(0);
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	for (ifni2 = ifni; ifni2->if_index != 0; ifni2++) {
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		if (strcmp(ifni2->if_name, ifname) == 0) {
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			index = ifni2->if_index;
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			if_freenameindex(ifni);
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			return index;
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		}
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	}
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	if_freenameindex(ifni);
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	errno = ENXIO;
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	return 0;
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}
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DEF_WEAK(if_nametoindex);