b6cbf7203b
This patch imports the unmodified current version of NetBSD libc. The NetBSD includes are in /nbsd_include, while the libc code itself is split between lib/nbsd_libc and common/lib/libc.
92 lines
2.7 KiB
C
92 lines
2.7 KiB
C
/* $NetBSD: if_nametoindex.c,v 1.4 2000/11/24 08:21:12 itojun Exp $ */
|
|
/* $KAME: if_nametoindex.c,v 1.6 2000/11/24 08:18:54 itojun Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1997, 2000
|
|
* Berkeley Software Design, Inc. 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY Berkeley Software Design, Inc. ``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 Berkeley Software Design, Inc. 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.
|
|
*
|
|
* BSDI Id: if_nametoindex.c,v 2.3 2000/04/17 22:38:05 dab Exp
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
__RCSID("$NetBSD: if_nametoindex.c,v 1.4 2000/11/24 08:21:12 itojun Exp $");
|
|
#endif /* LIBC_SCCS and not lint */
|
|
|
|
#include "namespace.h"
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <net/if.h>
|
|
#include <net/if_dl.h>
|
|
#include <ifaddrs.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
|
|
#ifdef __weak_alias
|
|
__weak_alias(if_nametoindex,_if_nametoindex)
|
|
#endif
|
|
|
|
/*
|
|
* From RFC 2553:
|
|
*
|
|
* 4.1 Name-to-Index
|
|
*
|
|
*
|
|
* The first function maps an interface name into its corresponding
|
|
* index.
|
|
*
|
|
* #include <net/if.h>
|
|
*
|
|
* unsigned int if_nametoindex(const char *ifname);
|
|
*
|
|
* If the specified interface name does not exist, the return value is
|
|
* 0, and errno is set to ENXIO. If there was a system error (such as
|
|
* running out of memory), the return value is 0 and errno is set to the
|
|
* proper value (e.g., ENOMEM).
|
|
*/
|
|
|
|
unsigned int
|
|
if_nametoindex(const char *ifname)
|
|
{
|
|
struct ifaddrs *ifaddrs, *ifa;
|
|
unsigned int ni;
|
|
|
|
if (getifaddrs(&ifaddrs) < 0)
|
|
return(0);
|
|
|
|
ni = 0;
|
|
|
|
for (ifa = ifaddrs; ifa != NULL; ifa = ifa->ifa_next) {
|
|
if (ifa->ifa_addr &&
|
|
ifa->ifa_addr->sa_family == AF_LINK &&
|
|
strcmp(ifa->ifa_name, ifname) == 0) {
|
|
ni = ((struct sockaddr_dl*)
|
|
(void *)ifa->ifa_addr)->sdl_index;
|
|
break;
|
|
}
|
|
}
|
|
|
|
freeifaddrs(ifaddrs);
|
|
if (!ni)
|
|
errno = ENXIO;
|
|
return(ni);
|
|
}
|