2fe8fb192f
There is important information about booting non-ack images in docs/UPDATING. ack/aout-format images can't be built any more, and booting clang/ELF-format ones is a little different. Updating to the new boot monitor is recommended. Changes in this commit: . drop boot monitor -> allowing dropping ack support . facility to copy ELF boot files to /boot so that old boot monitor can still boot fairly easily, see UPDATING . no more ack-format libraries -> single-case libraries . some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases . drop several ack toolchain commands, but not all support commands (e.g. aal is gone but acksize is not yet). . a few libc files moved to netbsd libc dir . new /bin/date as minix date used code in libc/ . test compile fix . harmonize includes . /usr/lib is no longer special: without ack, /usr/lib plays no kind of special bootstrapping role any more and bootstrapping is done exclusively through packages, so releases depend even less on the state of the machine making them now. . rename nbsd_lib* to lib* . reduce mtree
101 lines
3.2 KiB
C
101 lines
3.2 KiB
C
/* $NetBSD: if_indextoname.c,v 1.7 2010/12/13 23:10:12 pooka Exp $ */
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/* $KAME: if_indextoname.c,v 1.7 2000/11/08 03:09:30 itojun Exp $ */
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/*-
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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_indextoname.c,v 2.3 2000/04/17 22:38:05 dab Exp
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: if_indextoname.c,v 1.7 2010/12/13 23:10:12 pooka Exp $");
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#endif /* LIBC_SCCS and not lint */
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#ifndef RUMP_ACTION
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#include "namespace.h"
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#endif
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <net/if_dl.h>
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#include <net/if.h>
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#include <ifaddrs.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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#ifndef RUMP_ACTION
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#ifdef __weak_alias
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__weak_alias(if_indextoname,_if_indextoname)
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#endif
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#endif
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/*
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* From RFC 2533:
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*
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* The second function maps an interface index into its corresponding
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* name.
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*
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* #include <net/if.h>
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*
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* char *if_indextoname(unsigned int ifindex, char *ifname);
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*
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* The ifname argument must point to a buffer of at least IF_NAMESIZE
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* bytes into which the interface name corresponding to the specified
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* index is returned. (IF_NAMESIZE is also defined in <net/if.h> and
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* its value includes a terminating null byte at the end of the
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* interface name.) This pointer is also the return value of the
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* function. If there is no interface corresponding to the specified
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* index, NULL is returned, and errno is set to ENXIO, if there was a
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* system error (such as running out of memory), if_indextoname returns
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* NULL and errno would be set to the proper value (e.g., ENOMEM).
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*/
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char *
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if_indextoname(unsigned int ifindex, char *ifname)
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{
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struct ifaddrs *ifaddrs, *ifa;
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int error = 0;
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if (getifaddrs(&ifaddrs) < 0)
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return(NULL); /* getifaddrs properly set errno */
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for (ifa = ifaddrs; ifa != NULL; ifa = ifa->ifa_next) {
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if (ifa->ifa_addr &&
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ifa->ifa_addr->sa_family == AF_LINK &&
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ifindex == ((struct sockaddr_dl*)
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(void *)ifa->ifa_addr)->sdl_index)
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break;
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}
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if (ifa == NULL) {
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error = ENXIO;
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ifname = NULL;
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}
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else
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strlcpy(ifname, ifa->ifa_name, IFNAMSIZ);
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freeifaddrs(ifaddrs);
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errno = error;
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return(ifname);
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}
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