root/net80211/ieee80211_regdomain.c

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DEFINITIONS

This source file includes following definitions.
  1. bsearch
  2. ieee80211_regdomain_compare_cn
  3. ieee80211_regdomain_compare_rn
  4. ieee80211_name2countrycode
  5. ieee80211_name2regdomain
  6. ieee80211_countrycode2name
  7. ieee80211_regdomain2name
  8. ieee80211_regdomain2flag
  9. ieee80211_countrycode2regdomain

    1 /*      $OpenBSD: ieee80211_regdomain.c,v 1.7 2006/11/26 19:46:28 deraadt Exp $ */
    2 
    3 /*
    4  * Copyright (c) 2004, 2005 Reyk Floeter <reyk@openbsd.org>
    5  *
    6  * Permission to use, copy, modify, and distribute this software for any
    7  * purpose with or without fee is hereby granted, provided that the above
    8  * copyright notice and this permission notice appear in all copies.
    9  *
   10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   17  */
   18 
   19 /*
   20  * Basic regulation domain extensions for the IEEE 802.11 stack
   21  */
   22 
   23 #include <sys/param.h>
   24 #include <sys/systm.h>
   25 #include <sys/mbuf.h>
   26 #include <sys/kernel.h>
   27 #include <sys/socket.h>
   28 #include <sys/sockio.h>
   29 #include <sys/endian.h>
   30 #include <sys/errno.h>
   31 
   32 #include <net/if.h>
   33 #include <net/if_dl.h>
   34 #include <net/if_media.h>
   35 #include <net/if_arp.h>
   36 #include <net/if_llc.h>
   37 
   38 #ifdef INET
   39 #include <netinet/in.h>
   40 #include <netinet/if_ether.h>
   41 #endif
   42 
   43 #include <net80211/ieee80211_var.h>
   44 #include <net80211/ieee80211_regdomain.h>
   45 
   46 int      ieee80211_regdomain_compare_cn(const void *, const void *);
   47 int      ieee80211_regdomain_compare_rn(const void *, const void *);
   48 
   49 static const struct ieee80211_regdomainname
   50 ieee80211_r_names[] = IEEE80211_REGDOMAIN_NAMES;
   51 
   52 static const struct ieee80211_regdomainmap
   53 ieee80211_r_map[] = IEEE80211_REGDOMAIN_MAP;
   54 
   55 static const struct ieee80211_countryname
   56 ieee80211_r_ctry[] = IEEE80211_REGDOMAIN_COUNTRY_NAMES;
   57 
   58 #ifndef bsearch
   59 const void *bsearch(const void *, const void *, size_t, size_t,
   60     int (*)(const void *, const void *));
   61 
   62 const void *
   63 bsearch(const void *key, const void *base0, size_t nmemb, size_t size,
   64     int (*compar)(const void *, const void *))
   65 {
   66         const char *base = base0;
   67         int lim, cmp;
   68         const void *p;
   69 
   70         for (lim = nmemb; lim != 0; lim >>= 1) {
   71                 p = base + (lim >> 1) * size;
   72                 cmp = (*compar)(key, p);
   73                 if (cmp == 0)
   74                         return ((const void *)p);
   75                 if (cmp > 0) {  /* key > p: move right */
   76                         base = (const char *)p + size;
   77                         lim--;
   78                 } /* else move left */
   79         }
   80         return (NULL);
   81 }
   82 #endif
   83 
   84 int
   85 ieee80211_regdomain_compare_cn(const void *a, const void *b)
   86 {
   87         return (strcmp(((const struct ieee80211_countryname*)a)->cn_name,
   88             ((const struct ieee80211_countryname*)b)->cn_name));
   89 }
   90 
   91 int
   92 ieee80211_regdomain_compare_rn(const void *a, const void *b)
   93 {
   94         return (strcmp(((const struct ieee80211_regdomainname*)a)->rn_name,
   95             ((const struct ieee80211_regdomainname*)b)->rn_name));
   96 }
   97 
   98 u_int16_t
   99 ieee80211_name2countrycode(const char *name)
  100 {
  101         const struct ieee80211_countryname key = { CTRY_DEFAULT, name }, *value;
  102 
  103         if ((value = bsearch(&key, &ieee80211_r_ctry,
  104             sizeof(ieee80211_r_ctry) / sizeof(ieee80211_r_ctry[0]),
  105             sizeof(struct ieee80211_countryname),
  106             ieee80211_regdomain_compare_cn)) != NULL)
  107                 return (value->cn_code);
  108 
  109         return (CTRY_DEFAULT);
  110 }
  111 
  112 u_int32_t
  113 ieee80211_name2regdomain(const char *name)
  114 {
  115         const struct ieee80211_regdomainname *value;
  116         struct ieee80211_regdomainname key;
  117 
  118         key.rn_domain = DMN_DEFAULT;
  119         key.rn_name = name;
  120 
  121         if ((value = bsearch(&key, &ieee80211_r_names,
  122             sizeof(ieee80211_r_names) / sizeof(ieee80211_r_names[0]),
  123             sizeof(struct ieee80211_regdomainname),
  124             ieee80211_regdomain_compare_rn)) != NULL)
  125                 return ((u_int32_t)value->rn_domain);
  126 
  127         return ((u_int32_t)DMN_DEFAULT);
  128 }
  129 
  130 const char *
  131 ieee80211_countrycode2name(u_int16_t code)
  132 {
  133         int i;
  134 
  135         /* Linear search over the table */
  136         for (i = 0; i < (sizeof(ieee80211_r_ctry) /
  137             sizeof(ieee80211_r_ctry[0])); i++)
  138                 if (ieee80211_r_ctry[i].cn_code == code)
  139                         return (ieee80211_r_ctry[i].cn_name);
  140 
  141         return (NULL);
  142 }
  143 
  144 const char *
  145 ieee80211_regdomain2name(u_int32_t regdomain)
  146 {
  147         int i;
  148 
  149         /* Linear search over the table */
  150         for (i = 0; i < (sizeof(ieee80211_r_names) /
  151                 sizeof(ieee80211_r_names[0])); i++)
  152                 if (ieee80211_r_names[i].rn_domain == regdomain)
  153                         return (ieee80211_r_names[i].rn_name);
  154 
  155         return (ieee80211_r_names[0].rn_name);
  156 }
  157 
  158 u_int32_t
  159 ieee80211_regdomain2flag(u_int16_t regdomain, u_int16_t mhz)
  160 {
  161         int i;
  162 
  163         for (i = 0; i < (sizeof(ieee80211_r_map) /
  164                 sizeof(ieee80211_r_map[0])); i++) {
  165                 if (ieee80211_r_map[i].rm_domain == regdomain) {
  166                         if (mhz >= 2000 && mhz <= 3000)
  167                                 return ((u_int32_t)
  168                                     ieee80211_r_map[i].rm_domain_2ghz);
  169                         if (mhz >= IEEE80211_CHANNELS_5GHZ_MIN &&
  170                             mhz <= IEEE80211_CHANNELS_5GHZ_MAX)
  171                                 return ((u_int32_t)
  172                                     ieee80211_r_map[i].rm_domain_5ghz);
  173                 }
  174         }
  175 
  176         return ((u_int32_t)DMN_DEBUG);
  177 }
  178 
  179 u_int32_t
  180 ieee80211_countrycode2regdomain(u_int16_t code)
  181 {
  182         int i;
  183 
  184         for (i = 0;
  185              i < (sizeof(ieee80211_r_ctry) / sizeof(ieee80211_r_ctry[0])); i++)
  186                 if (ieee80211_r_ctry[i].cn_code == code)
  187                         return (ieee80211_r_ctry[i].cn_domain);
  188 
  189         return ((u_int32_t)DMN_DEFAULT);
  190 }

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