Annotation of sys/net80211/ieee80211_regdomain.c, Revision 1.1.1.1
1.1 nbrk 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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