1 /* $OpenBSD: ieee80211_regdomain.c,v 1.10 2015/11/24 13:45:06 mpi 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_llc.h>
36
37 #include <netinet/in.h>
38 #include <netinet/if_ether.h>
39
40 #include <net80211/ieee80211_var.h>
41 #include <net80211/ieee80211_regdomain.h>
42
43 int ieee80211_regdomain_compare_cn(const void *, const void *);
44 int ieee80211_regdomain_compare_rn(const void *, const void *);
45
46 static const struct ieee80211_regdomainname
47 ieee80211_r_names[] = IEEE80211_REGDOMAIN_NAMES;
48
49 static const struct ieee80211_regdomainmap
50 ieee80211_r_map[] = IEEE80211_REGDOMAIN_MAP;
51
52 static const struct ieee80211_countryname
53 ieee80211_r_ctry[] = IEEE80211_REGDOMAIN_COUNTRY_NAMES;
54
55 #ifndef bsearch
56 const void *bsearch(const void *, const void *, size_t, size_t,
57 int (*)(const void *, const void *));
58
59 const void *
bsearch(const void * key,const void * base0,size_t nmemb,size_t size,int (* compar)(const void *,const void *))60 bsearch(const void *key, const void *base0, size_t nmemb, size_t size,
61 int (*compar)(const void *, const void *))
62 {
63 const char *base = base0;
64 int lim, cmp;
65 const void *p;
66
67 for (lim = nmemb; lim != 0; lim >>= 1) {
68 p = base + (lim >> 1) * size;
69 cmp = (*compar)(key, p);
70 if (cmp == 0)
71 return ((const void *)p);
72 if (cmp > 0) { /* key > p: move right */
73 base = (const char *)p + size;
74 lim--;
75 } /* else move left */
76 }
77 return (NULL);
78 }
79 #endif
80
81 int
ieee80211_regdomain_compare_cn(const void * a,const void * b)82 ieee80211_regdomain_compare_cn(const void *a, const void *b)
83 {
84 return (strcmp(((const struct ieee80211_countryname*)a)->cn_name,
85 ((const struct ieee80211_countryname*)b)->cn_name));
86 }
87
88 int
ieee80211_regdomain_compare_rn(const void * a,const void * b)89 ieee80211_regdomain_compare_rn(const void *a, const void *b)
90 {
91 return (strcmp(((const struct ieee80211_regdomainname*)a)->rn_name,
92 ((const struct ieee80211_regdomainname*)b)->rn_name));
93 }
94
95 u_int16_t
ieee80211_name2countrycode(const char * name)96 ieee80211_name2countrycode(const char *name)
97 {
98 const struct ieee80211_countryname key = { CTRY_DEFAULT, name }, *value;
99
100 if ((value = bsearch(&key, &ieee80211_r_ctry,
101 nitems(ieee80211_r_ctry), sizeof(struct ieee80211_countryname),
102 ieee80211_regdomain_compare_cn)) != NULL)
103 return (value->cn_code);
104
105 return (CTRY_DEFAULT);
106 }
107
108 u_int32_t
ieee80211_name2regdomain(const char * name)109 ieee80211_name2regdomain(const char *name)
110 {
111 const struct ieee80211_regdomainname *value;
112 struct ieee80211_regdomainname key;
113
114 key.rn_domain = DMN_DEFAULT;
115 key.rn_name = name;
116
117 if ((value = bsearch(&key, &ieee80211_r_names,
118 nitems(ieee80211_r_names), sizeof(struct ieee80211_regdomainname),
119 ieee80211_regdomain_compare_rn)) != NULL)
120 return ((u_int32_t)value->rn_domain);
121
122 return ((u_int32_t)DMN_DEFAULT);
123 }
124
125 const char *
ieee80211_countrycode2name(u_int16_t code)126 ieee80211_countrycode2name(u_int16_t code)
127 {
128 int i;
129
130 /* Linear search over the table */
131 for (i = 0; i < (sizeof(ieee80211_r_ctry) /
132 sizeof(ieee80211_r_ctry[0])); i++)
133 if (ieee80211_r_ctry[i].cn_code == code)
134 return (ieee80211_r_ctry[i].cn_name);
135
136 return (NULL);
137 }
138
139 const char *
ieee80211_regdomain2name(u_int32_t regdomain)140 ieee80211_regdomain2name(u_int32_t regdomain)
141 {
142 int i;
143
144 /* Linear search over the table */
145 for (i = 0; i < (sizeof(ieee80211_r_names) /
146 sizeof(ieee80211_r_names[0])); i++)
147 if (ieee80211_r_names[i].rn_domain == regdomain)
148 return (ieee80211_r_names[i].rn_name);
149
150 return (ieee80211_r_names[0].rn_name);
151 }
152
153 u_int32_t
ieee80211_regdomain2flag(u_int16_t regdomain,u_int16_t mhz)154 ieee80211_regdomain2flag(u_int16_t regdomain, u_int16_t mhz)
155 {
156 int i;
157
158 for (i = 0; i < (sizeof(ieee80211_r_map) /
159 sizeof(ieee80211_r_map[0])); i++) {
160 if (ieee80211_r_map[i].rm_domain == regdomain) {
161 if (mhz >= 2000 && mhz <= 3000)
162 return ((u_int32_t)
163 ieee80211_r_map[i].rm_domain_2ghz);
164 if (mhz >= IEEE80211_CHANNELS_5GHZ_MIN &&
165 mhz <= IEEE80211_CHANNELS_5GHZ_MAX)
166 return ((u_int32_t)
167 ieee80211_r_map[i].rm_domain_5ghz);
168 }
169 }
170
171 return ((u_int32_t)DMN_DEBUG);
172 }
173
174 u_int32_t
ieee80211_countrycode2regdomain(u_int16_t code)175 ieee80211_countrycode2regdomain(u_int16_t code)
176 {
177 int i;
178
179 for (i = 0; i < nitems(ieee80211_r_ctry); i++)
180 if (ieee80211_r_ctry[i].cn_code == code)
181 return (ieee80211_r_ctry[i].cn_domain);
182
183 return ((u_int32_t)DMN_DEFAULT);
184 }
185