NetBSD/lib/libutil/if_media.c

181 lines
4.9 KiB
C

/* $NetBSD: if_media.c,v 1.2 2008/04/28 20:23:03 martin Exp $ */
/*-
* Copyright (c) 1997, 1998, 2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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 <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: if_media.c,v 1.2 2008/04/28 20:23:03 martin Exp $");
#endif
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <net/if_media.h>
struct ifmedia_description ifm_mode_descriptions[] =
IFM_MODE_DESCRIPTIONS;
struct ifmedia_description ifm_type_descriptions[] =
IFM_TYPE_DESCRIPTIONS;
struct ifmedia_description ifm_subtype_descriptions[] =
IFM_SUBTYPE_DESCRIPTIONS;
struct ifmedia_description ifm_option_descriptions[] =
IFM_OPTION_DESCRIPTIONS;
const char *
get_media_type_string(int mword)
{
struct ifmedia_description *desc;
for (desc = ifm_type_descriptions; desc->ifmt_string != NULL; desc++) {
if (IFM_TYPE(mword) == desc->ifmt_word)
return (desc->ifmt_string);
}
return "<unknown type>";
}
const char *
get_media_subtype_string(int mword)
{
struct ifmedia_description *desc;
for (desc = ifm_subtype_descriptions; desc->ifmt_string != NULL;
desc++) {
if (IFM_TYPE_MATCH(desc->ifmt_word, mword) &&
IFM_SUBTYPE(desc->ifmt_word) == IFM_SUBTYPE(mword))
return desc->ifmt_string;
}
return "<unknown subtype>";
}
const char *
get_media_mode_string(int mword)
{
struct ifmedia_description *desc;
for (desc = ifm_mode_descriptions; desc->ifmt_string != NULL; desc++) {
if (IFM_TYPE_MATCH(desc->ifmt_word, mword) &&
IFM_MODE(mword) == IFM_MODE(desc->ifmt_word))
return desc->ifmt_string;
}
return NULL;
}
const char *
get_media_option_string(int *mwordp)
{
struct ifmedia_description *desc;
int mword = *mwordp;
for (desc = ifm_option_descriptions; desc->ifmt_string != NULL;
desc++) {
if (!IFM_TYPE_MATCH(desc->ifmt_word, mword))
continue;
if (mword & IFM_OPTIONS(desc->ifmt_word)) {
*mwordp = mword & ~IFM_OPTIONS(desc->ifmt_word);
return desc->ifmt_string;
}
}
/* Historical behaviour is to ignore unknown option bits! */
*mwordp = mword & ~IFM_OPTIONS(~0);
return NULL;
}
int
lookup_media_word(struct ifmedia_description *desc, int type, const char *val)
{
for (; desc->ifmt_string != NULL; desc++) {
if (IFM_TYPE_MATCH(desc->ifmt_word, type) &&
strcasecmp(desc->ifmt_string, val) == 0)
return (desc->ifmt_word);
}
return -1;
}
int
get_media_mode(int type, const char *val)
{
return lookup_media_word(ifm_mode_descriptions, type, val);
}
int
get_media_subtype(int type, const char *val)
{
return lookup_media_word(ifm_subtype_descriptions, type, val);
}
int
get_media_options(int type, const char *val, char **invalid)
{
char *optlist, *str;
int option, rval = 0;
/* We muck with the string, so copy it. */
optlist = strdup(val);
if (optlist == NULL) {
if (invalid != NULL)
*invalid = NULL;
return -1;
}
str = optlist;
/*
* Look up the options in the user-provided comma-separated list.
*/
type = IFM_TYPE(type);
for (; (str = strtok(str, ",")) != NULL; str = NULL) {
option = lookup_media_word(ifm_option_descriptions, type, str);
if (option != -1) {
rval |= IFM_OPTIONS(option);
continue;
}
rval = -1;
if (invalid == NULL)
break;
/* Pass invalid option at start of malloced buffer */
if (str != optlist)
memmove(optlist, str, strlen(str) + 1);
/* Caller should free() or exit() */
*invalid = optlist;
return rval;
}
free(optlist);
return (rval);
}