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/* $OpenBSD: ieee80211_regdomain.c,v 1.7 2006/11/26 19:46:28 deraadt Exp $ */
/*
* Copyright (c) 2004, 2005 Reyk Floeter <reyk@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* Basic regulation domain extensions for the IEEE 802.11 stack
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/endian.h>
#include <sys/errno.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_arp.h>
#include <net/if_llc.h>
#ifdef INET
#include <netinet/in.h>
#include <netinet/if_ether.h>
#endif
#include <net80211/ieee80211_var.h>
#include <net80211/ieee80211_regdomain.h>
int ieee80211_regdomain_compare_cn(const void *, const void *);
int ieee80211_regdomain_compare_rn(const void *, const void *);
static const struct ieee80211_regdomainname
ieee80211_r_names[] = IEEE80211_REGDOMAIN_NAMES;
static const struct ieee80211_regdomainmap
ieee80211_r_map[] = IEEE80211_REGDOMAIN_MAP;
static const struct ieee80211_countryname
ieee80211_r_ctry[] = IEEE80211_REGDOMAIN_COUNTRY_NAMES;
#ifndef bsearch
const void *bsearch(const void *, const void *, size_t, size_t,
int (*)(const void *, const void *));
const void *
bsearch(const void *key, const void *base0, size_t nmemb, size_t size,
int (*compar)(const void *, const void *))
{
const char *base = base0;
int lim, cmp;
const void *p;
for (lim = nmemb; lim != 0; lim >>= 1) {
p = base + (lim >> 1) * size;
cmp = (*compar)(key, p);
if (cmp == 0)
return ((const void *)p);
if (cmp > 0) { /* key > p: move right */
base = (const char *)p + size;
lim--;
} /* else move left */
}
return (NULL);
}
#endif
int
ieee80211_regdomain_compare_cn(const void *a, const void *b)
{
return (strcmp(((const struct ieee80211_countryname*)a)->cn_name,
((const struct ieee80211_countryname*)b)->cn_name));
}
int
ieee80211_regdomain_compare_rn(const void *a, const void *b)
{
return (strcmp(((const struct ieee80211_regdomainname*)a)->rn_name,
((const struct ieee80211_regdomainname*)b)->rn_name));
}
u_int16_t
ieee80211_name2countrycode(const char *name)
{
const struct ieee80211_countryname key = { CTRY_DEFAULT, name }, *value;
if ((value = bsearch(&key, &ieee80211_r_ctry,
sizeof(ieee80211_r_ctry) / sizeof(ieee80211_r_ctry[0]),
sizeof(struct ieee80211_countryname),
ieee80211_regdomain_compare_cn)) != NULL)
return (value->cn_code);
return (CTRY_DEFAULT);
}
u_int32_t
ieee80211_name2regdomain(const char *name)
{
const struct ieee80211_regdomainname *value;
struct ieee80211_regdomainname key;
key.rn_domain = DMN_DEFAULT;
key.rn_name = name;
if ((value = bsearch(&key, &ieee80211_r_names,
sizeof(ieee80211_r_names) / sizeof(ieee80211_r_names[0]),
sizeof(struct ieee80211_regdomainname),
ieee80211_regdomain_compare_rn)) != NULL)
return ((u_int32_t)value->rn_domain);
return ((u_int32_t)DMN_DEFAULT);
}
const char *
ieee80211_countrycode2name(u_int16_t code)
{
int i;
/* Linear search over the table */
for (i = 0; i < (sizeof(ieee80211_r_ctry) /
sizeof(ieee80211_r_ctry[0])); i++)
if (ieee80211_r_ctry[i].cn_code == code)
return (ieee80211_r_ctry[i].cn_name);
return (NULL);
}
const char *
ieee80211_regdomain2name(u_int32_t regdomain)
{
int i;
/* Linear search over the table */
for (i = 0; i < (sizeof(ieee80211_r_names) /
sizeof(ieee80211_r_names[0])); i++)
if (ieee80211_r_names[i].rn_domain == regdomain)
return (ieee80211_r_names[i].rn_name);
return (ieee80211_r_names[0].rn_name);
}
u_int32_t
ieee80211_regdomain2flag(u_int16_t regdomain, u_int16_t mhz)
{
int i;
for (i = 0; i < (sizeof(ieee80211_r_map) /
sizeof(ieee80211_r_map[0])); i++) {
if (ieee80211_r_map[i].rm_domain == regdomain) {
if (mhz >= 2000 && mhz <= 3000)
return ((u_int32_t)
ieee80211_r_map[i].rm_domain_2ghz);
if (mhz >= IEEE80211_CHANNELS_5GHZ_MIN &&
mhz <= IEEE80211_CHANNELS_5GHZ_MAX)
return ((u_int32_t)
ieee80211_r_map[i].rm_domain_5ghz);
}
}
return ((u_int32_t)DMN_DEBUG);
}
u_int32_t
ieee80211_countrycode2regdomain(u_int16_t code)
{
int i;
for (i = 0;
i < (sizeof(ieee80211_r_ctry) / sizeof(ieee80211_r_ctry[0])); i++)
if (ieee80211_r_ctry[i].cn_code == code)
return (ieee80211_r_ctry[i].cn_domain);
return ((u_int32_t)DMN_DEFAULT);
}
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