185 lines
4.8 KiB
C
185 lines
4.8 KiB
C
/* $OpenBSD: ieee80211_regdomain.c,v 1.10 2015/11/24 13:45:06 mpi Exp $ */
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/*
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* Copyright (c) 2004, 2005 Reyk Floeter <reyk@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/*
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* Basic regulation domain extensions for the IEEE 802.11 stack
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/mbuf.h>
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#include <sys/kernel.h>
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#include <sys/socket.h>
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#include <sys/sockio.h>
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#include <sys/endian.h>
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#include <sys/errno.h>
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#include <net/if.h>
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#include <net/if_dl.h>
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#include <net/if_media.h>
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#include <net/if_llc.h>
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#include <netinet/in.h>
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#include <netinet/if_ether.h>
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#include <net80211/ieee80211_var.h>
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#include <net80211/ieee80211_regdomain.h>
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int ieee80211_regdomain_compare_cn(const void *, const void *);
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int ieee80211_regdomain_compare_rn(const void *, const void *);
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static const struct ieee80211_regdomainname
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ieee80211_r_names[] = IEEE80211_REGDOMAIN_NAMES;
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static const struct ieee80211_regdomainmap
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ieee80211_r_map[] = IEEE80211_REGDOMAIN_MAP;
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static const struct ieee80211_countryname
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ieee80211_r_ctry[] = IEEE80211_REGDOMAIN_COUNTRY_NAMES;
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#ifndef bsearch
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const void *bsearch(const void *, const void *, size_t, size_t,
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int (*)(const void *, const void *));
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const void *
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bsearch(const void *key, const void *base0, size_t nmemb, size_t size,
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int (*compar)(const void *, const void *))
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{
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const char *base = base0;
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int lim, cmp;
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const void *p;
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for (lim = nmemb; lim != 0; lim >>= 1) {
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p = base + (lim >> 1) * size;
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cmp = (*compar)(key, p);
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if (cmp == 0)
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return ((const void *)p);
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if (cmp > 0) { /* key > p: move right */
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base = (const char *)p + size;
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lim--;
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} /* else move left */
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}
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return (NULL);
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}
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#endif
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int
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ieee80211_regdomain_compare_cn(const void *a, const void *b)
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{
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return (strcmp(((const struct ieee80211_countryname*)a)->cn_name,
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((const struct ieee80211_countryname*)b)->cn_name));
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}
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int
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ieee80211_regdomain_compare_rn(const void *a, const void *b)
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{
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return (strcmp(((const struct ieee80211_regdomainname*)a)->rn_name,
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((const struct ieee80211_regdomainname*)b)->rn_name));
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}
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u_int16_t
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ieee80211_name2countrycode(const char *name)
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{
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const struct ieee80211_countryname key = { CTRY_DEFAULT, name }, *value;
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if ((value = bsearch(&key, &ieee80211_r_ctry,
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nitems(ieee80211_r_ctry), sizeof(struct ieee80211_countryname),
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ieee80211_regdomain_compare_cn)) != NULL)
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return (value->cn_code);
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return (CTRY_DEFAULT);
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}
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u_int32_t
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ieee80211_name2regdomain(const char *name)
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{
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const struct ieee80211_regdomainname *value;
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struct ieee80211_regdomainname key;
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key.rn_domain = DMN_DEFAULT;
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key.rn_name = name;
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if ((value = bsearch(&key, &ieee80211_r_names,
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nitems(ieee80211_r_names), sizeof(struct ieee80211_regdomainname),
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ieee80211_regdomain_compare_rn)) != NULL)
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return ((u_int32_t)value->rn_domain);
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return ((u_int32_t)DMN_DEFAULT);
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}
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const char *
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ieee80211_countrycode2name(u_int16_t code)
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{
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int i;
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/* Linear search over the table */
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for (i = 0; i < (sizeof(ieee80211_r_ctry) /
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sizeof(ieee80211_r_ctry[0])); i++)
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if (ieee80211_r_ctry[i].cn_code == code)
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return (ieee80211_r_ctry[i].cn_name);
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return (NULL);
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}
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const char *
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ieee80211_regdomain2name(u_int32_t regdomain)
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{
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int i;
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/* Linear search over the table */
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for (i = 0; i < (sizeof(ieee80211_r_names) /
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sizeof(ieee80211_r_names[0])); i++)
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if (ieee80211_r_names[i].rn_domain == regdomain)
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return (ieee80211_r_names[i].rn_name);
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return (ieee80211_r_names[0].rn_name);
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}
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u_int32_t
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ieee80211_regdomain2flag(u_int16_t regdomain, u_int16_t mhz)
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{
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int i;
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for (i = 0; i < (sizeof(ieee80211_r_map) /
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sizeof(ieee80211_r_map[0])); i++) {
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if (ieee80211_r_map[i].rm_domain == regdomain) {
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if (mhz >= 2000 && mhz <= 3000)
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return ((u_int32_t)
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ieee80211_r_map[i].rm_domain_2ghz);
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if (mhz >= IEEE80211_CHANNELS_5GHZ_MIN &&
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mhz <= IEEE80211_CHANNELS_5GHZ_MAX)
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return ((u_int32_t)
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ieee80211_r_map[i].rm_domain_5ghz);
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}
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}
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return ((u_int32_t)DMN_DEBUG);
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}
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u_int32_t
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ieee80211_countrycode2regdomain(u_int16_t code)
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{
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int i;
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for (i = 0; i < nitems(ieee80211_r_ctry); i++)
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if (ieee80211_r_ctry[i].cn_code == code)
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return (ieee80211_r_ctry[i].cn_domain);
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return ((u_int32_t)DMN_DEFAULT);
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}
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