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- /* $OpenBSD: ieee80211_regdomain.c,v 1.9 2014/12/23 03:24:08 tedu 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>
- #include <netinet/in.h>
- #include <netinet/if_ether.h>
- #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,
- nitems(ieee80211_r_ctry), 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,
- nitems(ieee80211_r_names), 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 < nitems(ieee80211_r_ctry); 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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