lib/libutil/if_media.c

   1 /*      $NetBSD: if_media.c,v 1.2 2008/04/28 20:23:03 martin Exp $      */
   2
   3 /*-
   4  * Copyright (c) 1997, 1998, 2000 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
   9  * NASA Ames Research Center.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  30  * POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #include <sys/cdefs.h>
  34 #if defined(LIBC_SCCS) && !defined(lint)
  35 __RCSID("$NetBSD: if_media.c,v 1.2 2008/04/28 20:23:03 martin Exp $");
  36 #endif
  37
  38 #include <stdio.h>
  39 #include <string.h>
  40 #include <stdlib.h>
  41 #include <sys/types.h>
  42 #include <net/if_media.h>
  43
  44 struct ifmedia_description ifm_mode_descriptions[] =
  45     IFM_MODE_DESCRIPTIONS;
  46
  47 struct ifmedia_description ifm_type_descriptions[] =
  48     IFM_TYPE_DESCRIPTIONS;
  49
  50 struct ifmedia_description ifm_subtype_descriptions[] =
  51     IFM_SUBTYPE_DESCRIPTIONS;
  52
  53 struct ifmedia_description ifm_option_descriptions[] =
  54     IFM_OPTION_DESCRIPTIONS;
  55
  56 const char *
  57 get_media_type_string(int mword)
  58 {
  59         struct ifmedia_description *desc;
  60
  61         for (desc = ifm_type_descriptions; desc->ifmt_string != NULL; desc++) {
  62                 if (IFM_TYPE(mword) == desc->ifmt_word)
  63                         return (desc->ifmt_string);
  64         }
  65         return "<unknown type>";
  66 }
  67
  68 const char *
  69 get_media_subtype_string(int mword)
  70 {
  71         struct ifmedia_description *desc;
  72
  73         for (desc = ifm_subtype_descriptions; desc->ifmt_string != NULL;
  74              desc++) {
  75                 if (IFM_TYPE_MATCH(desc->ifmt_word, mword) &&
  76                     IFM_SUBTYPE(desc->ifmt_word) == IFM_SUBTYPE(mword))
  77                         return desc->ifmt_string;
  78         }
  79         return "<unknown subtype>";
  80 }
  81
  82 const char *
  83 get_media_mode_string(int mword)
  84 {
  85         struct ifmedia_description *desc;
  86
  87         for (desc = ifm_mode_descriptions; desc->ifmt_string != NULL; desc++) {
  88                 if (IFM_TYPE_MATCH(desc->ifmt_word, mword) &&
  89                     IFM_MODE(mword) == IFM_MODE(desc->ifmt_word))
  90                         return desc->ifmt_string;
  91         }
  92         return NULL;
  93 }
  94
  95 const char *
  96 get_media_option_string(int *mwordp)
  97 {
  98         struct ifmedia_description *desc;
  99         int mword = *mwordp;
 100
 101         for (desc = ifm_option_descriptions; desc->ifmt_string != NULL;
 102              desc++) {
 103                 if (!IFM_TYPE_MATCH(desc->ifmt_word, mword))
 104                         continue;
 105                 if (mword & IFM_OPTIONS(desc->ifmt_word)) {
 106                         *mwordp = mword & ~IFM_OPTIONS(desc->ifmt_word);
 107                         return desc->ifmt_string;
 108                 }
 109         }
 110
 111         /* Historical behaviour is to ignore unknown option bits! */
 112         *mwordp = mword & ~IFM_OPTIONS(~0);
 113         return NULL;
 114 }
 115
 116 int
 117 lookup_media_word(struct ifmedia_description *desc, int type, const char *val)
 118 {
 119
 120         for (; desc->ifmt_string != NULL; desc++) {
 121                 if (IFM_TYPE_MATCH(desc->ifmt_word, type) &&
 122                     strcasecmp(desc->ifmt_string, val) == 0)
 123                         return (desc->ifmt_word);
 124         }
 125         return -1;
 126 }
 127
 128 int
 129 get_media_mode(int type, const char *val)
 130 {
 131
 132         return lookup_media_word(ifm_mode_descriptions, type, val);
 133 }
 134
 135 int
 136 get_media_subtype(int type, const char *val)
 137 {
 138
 139         return lookup_media_word(ifm_subtype_descriptions, type, val);
 140 }
 141
 142 int
 143 get_media_options(int type, const char *val, char **invalid)
 144 {
 145         char *optlist, *str;
 146         int option, rval = 0;
 147
 148         /* We muck with the string, so copy it. */
 149         optlist = strdup(val);
 150         if (optlist == NULL) {
 151                 if (invalid != NULL)
 152                         *invalid = NULL;
 153                 return -1;
 154         }
 155         str = optlist;
 156
 157         /*
 158          * Look up the options in the user-provided comma-separated list.
 159          */
 160         type = IFM_TYPE(type);
 161         for (; (str = strtok(str, ",")) != NULL; str = NULL) {
 162                 option = lookup_media_word(ifm_option_descriptions, type, str);
 163                 if (option != -1) {
 164                         rval |= IFM_OPTIONS(option);
 165                         continue;
 166                 }
 167                 rval = -1;
 168                 if (invalid == NULL)
 169                         break;
 170                 /* Pass invalid option at start of malloced buffer */
 171                 if (str != optlist)
 172                         memmove(optlist, str, strlen(str) + 1);
 173                 /* Caller should free() or exit() */
 174                 *invalid = optlist;
 175                 return rval;
 176         }
 177
 178         free(optlist);
 179         return (rval);
 180 }