1 /******************************************************************************
3 Copyright(c) 2005 Intel Corporation. All rights reserved.
5 This program is free software; you can redistribute it and/or modify it
6 under the terms of version 2 of the GNU General Public License as
7 published by the Free Software Foundation.
9 This program is distributed in the hope that it will be useful, but WITHOUT
10 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 You should have received a copy of the GNU General Public License along with
15 this program; if not, write to the Free Software Foundation, Inc., 59
16 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 The full GNU General Public License is included in this distribution in the
22 James P. Ketrenos <ipw2100-admin@linux.intel.com>
23 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25 ******************************************************************************/
26 #include <linux/compiler.h>
27 #include <linux/config.h>
28 #include <linux/errno.h>
29 #include <linux/if_arp.h>
30 #include <linux/in6.h>
33 #include <linux/kernel.h>
34 #include <linux/module.h>
35 #include <linux/netdevice.h>
36 #include <linux/proc_fs.h>
37 #include <linux/skbuff.h>
38 #include <linux/slab.h>
39 #include <linux/tcp.h>
40 #include <linux/types.h>
41 #include <linux/wireless.h>
42 #include <linux/etherdevice.h>
43 #include <asm/uaccess.h>
45 #include <net/ieee80211.h>
47 int ieee80211_is_valid_channel(struct ieee80211_device *ieee, u8 channel)
51 /* Driver needs to initialize the geography map before using
52 * these helper functions */
53 BUG_ON(ieee->geo.bg_channels == 0 && ieee->geo.a_channels == 0);
55 if (ieee->freq_band & IEEE80211_24GHZ_BAND)
56 for (i = 0; i < ieee->geo.bg_channels; i++)
57 /* NOTE: If G mode is currently supported but
58 * this is a B only channel, we don't see it
60 if ((ieee->geo.bg[i].channel == channel) &&
61 !(ieee->geo.bg[i].flags & IEEE80211_CH_INVALID) &&
62 (!(ieee->mode & IEEE_G) ||
63 !(ieee->geo.bg[i].flags & IEEE80211_CH_B_ONLY)))
64 return IEEE80211_24GHZ_BAND;
66 if (ieee->freq_band & IEEE80211_52GHZ_BAND)
67 for (i = 0; i < ieee->geo.a_channels; i++)
68 if ((ieee->geo.a[i].channel == channel) &&
69 !(ieee->geo.a[i].flags & IEEE80211_CH_INVALID))
70 return IEEE80211_52GHZ_BAND;
75 int ieee80211_channel_to_index(struct ieee80211_device *ieee, u8 channel)
79 /* Driver needs to initialize the geography map before using
80 * these helper functions */
81 BUG_ON(ieee->geo.bg_channels == 0 && ieee->geo.a_channels == 0);
83 if (ieee->freq_band & IEEE80211_24GHZ_BAND)
84 for (i = 0; i < ieee->geo.bg_channels; i++)
85 if (ieee->geo.bg[i].channel == channel)
88 if (ieee->freq_band & IEEE80211_52GHZ_BAND)
89 for (i = 0; i < ieee->geo.a_channels; i++)
90 if (ieee->geo.a[i].channel == channel)
96 u8 ieee80211_freq_to_channel(struct ieee80211_device * ieee, u32 freq)
100 /* Driver needs to initialize the geography map before using
101 * these helper functions */
102 BUG_ON(ieee->geo.bg_channels == 0 && ieee->geo.a_channels == 0);
106 if (ieee->freq_band & IEEE80211_24GHZ_BAND)
107 for (i = 0; i < ieee->geo.bg_channels; i++)
108 if (ieee->geo.bg[i].freq == freq)
109 return ieee->geo.bg[i].channel;
111 if (ieee->freq_band & IEEE80211_52GHZ_BAND)
112 for (i = 0; i < ieee->geo.a_channels; i++)
113 if (ieee->geo.a[i].freq == freq)
114 return ieee->geo.a[i].channel;
119 int ieee80211_set_geo(struct ieee80211_device *ieee,
120 const struct ieee80211_geo *geo)
122 memcpy(ieee->geo.name, geo->name, 3);
123 ieee->geo.name[3] = '\0';
124 ieee->geo.bg_channels = geo->bg_channels;
125 ieee->geo.a_channels = geo->a_channels;
126 memcpy(ieee->geo.bg, geo->bg, geo->bg_channels *
127 sizeof(struct ieee80211_channel));
128 memcpy(ieee->geo.a, geo->a, ieee->geo.a_channels *
129 sizeof(struct ieee80211_channel));
133 const struct ieee80211_geo *ieee80211_get_geo(struct ieee80211_device *ieee)
138 u8 ieee80211_get_channel_flags(struct ieee80211_device * ieee, u8 channel)
140 int index = ieee80211_channel_to_index(ieee, channel);
143 return IEEE80211_CH_INVALID;
145 if (channel <= IEEE80211_24GHZ_CHANNELS)
146 return ieee->geo.bg[index].flags;
148 return ieee->geo.a[index].flags;
151 static const struct ieee80211_channel bad_channel = {
153 .flags = IEEE80211_CH_INVALID,
157 const struct ieee80211_channel *ieee80211_get_channel(struct ieee80211_device
160 int index = ieee80211_channel_to_index(ieee, channel);
165 if (channel <= IEEE80211_24GHZ_CHANNELS)
166 return &ieee->geo.bg[index];
168 return &ieee->geo.a[index];
171 EXPORT_SYMBOL(ieee80211_get_channel);
172 EXPORT_SYMBOL(ieee80211_get_channel_flags);
173 EXPORT_SYMBOL(ieee80211_is_valid_channel);
174 EXPORT_SYMBOL(ieee80211_freq_to_channel);
175 EXPORT_SYMBOL(ieee80211_channel_to_index);
176 EXPORT_SYMBOL(ieee80211_set_geo);
177 EXPORT_SYMBOL(ieee80211_get_geo);