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b453872c JG |
1 | /******************************************************************************* |
2 | ||
ebeaddcc | 3 | Copyright(c) 2004-2005 Intel Corporation. All rights reserved. |
b453872c JG |
4 | |
5 | Portions of this file are based on the WEP enablement code provided by the | |
6 | Host AP project hostap-drivers v0.1.3 | |
7 | Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen | |
85d32e7b JM |
8 | <j@w1.fi> |
9 | Copyright (c) 2002-2003, Jouni Malinen <j@w1.fi> | |
b453872c JG |
10 | |
11 | This program is free software; you can redistribute it and/or modify it | |
12 | under the terms of version 2 of the GNU General Public License as | |
13 | published by the Free Software Foundation. | |
14 | ||
15 | This program is distributed in the hope that it will be useful, but WITHOUT | |
16 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
17 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
18 | more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License along with | |
21 | this program; if not, write to the Free Software Foundation, Inc., 59 | |
22 | Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
23 | ||
24 | The full GNU General Public License is included in this distribution in the | |
25 | file called LICENSE. | |
26 | ||
27 | Contact Information: | |
c1eb2c82 | 28 | Intel Linux Wireless <ilw@linux.intel.com> |
b453872c JG |
29 | Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
30 | ||
31 | *******************************************************************************/ | |
32 | ||
33 | #include <linux/compiler.h> | |
b453872c JG |
34 | #include <linux/errno.h> |
35 | #include <linux/if_arp.h> | |
36 | #include <linux/in6.h> | |
37 | #include <linux/in.h> | |
38 | #include <linux/ip.h> | |
39 | #include <linux/kernel.h> | |
40 | #include <linux/module.h> | |
41 | #include <linux/netdevice.h> | |
b453872c JG |
42 | #include <linux/proc_fs.h> |
43 | #include <linux/skbuff.h> | |
44 | #include <linux/slab.h> | |
45 | #include <linux/tcp.h> | |
46 | #include <linux/types.h> | |
b453872c JG |
47 | #include <linux/wireless.h> |
48 | #include <linux/etherdevice.h> | |
49 | #include <asm/uaccess.h> | |
457c4cbc | 50 | #include <net/net_namespace.h> |
b453872c JG |
51 | #include <net/arp.h> |
52 | ||
b0a4e7d8 | 53 | #include "libipw.h" |
b453872c | 54 | |
31696160 JK |
55 | #define DRV_DESCRIPTION "802.11 data/management/control stack" |
56 | #define DRV_NAME "ieee80211" | |
b0a4e7d8 | 57 | #define DRV_VERSION LIBIPW_VERSION |
31696160 JK |
58 | #define DRV_COPYRIGHT "Copyright (C) 2004-2005 Intel Corporation <jketreno@linux.intel.com>" |
59 | ||
60 | MODULE_VERSION(DRV_VERSION); | |
61 | MODULE_DESCRIPTION(DRV_DESCRIPTION); | |
62 | MODULE_AUTHOR(DRV_COPYRIGHT); | |
b453872c JG |
63 | MODULE_LICENSE("GPL"); |
64 | ||
b8ecd988 JL |
65 | struct cfg80211_ops libipw_config_ops = { }; |
66 | void *libipw_wiphy_privid = &libipw_wiphy_privid; | |
67 | ||
b0a4e7d8 | 68 | static int libipw_networks_allocate(struct libipw_device *ieee) |
b453872c JG |
69 | { |
70 | if (ieee->networks) | |
71 | return 0; | |
72 | ||
0edd5b44 | 73 | ieee->networks = |
b0a4e7d8 | 74 | kzalloc(MAX_NETWORK_COUNT * sizeof(struct libipw_network), |
0edd5b44 | 75 | GFP_KERNEL); |
b453872c JG |
76 | if (!ieee->networks) { |
77 | printk(KERN_WARNING "%s: Out of memory allocating beacons\n", | |
78 | ieee->dev->name); | |
79 | return -ENOMEM; | |
80 | } | |
81 | ||
b453872c JG |
82 | return 0; |
83 | } | |
84 | ||
b0a4e7d8 | 85 | void libipw_network_reset(struct libipw_network *network) |
15f38598 ZY |
86 | { |
87 | if (!network) | |
88 | return; | |
89 | ||
90 | if (network->ibss_dfs) { | |
91 | kfree(network->ibss_dfs); | |
92 | network->ibss_dfs = NULL; | |
93 | } | |
94 | } | |
95 | ||
b0a4e7d8 | 96 | static inline void libipw_networks_free(struct libipw_device *ieee) |
b453872c | 97 | { |
15f38598 ZY |
98 | int i; |
99 | ||
b453872c JG |
100 | if (!ieee->networks) |
101 | return; | |
15f38598 ZY |
102 | |
103 | for (i = 0; i < MAX_NETWORK_COUNT; i++) | |
104 | if (ieee->networks[i].ibss_dfs) | |
105 | kfree(ieee->networks[i].ibss_dfs); | |
106 | ||
b453872c JG |
107 | kfree(ieee->networks); |
108 | ieee->networks = NULL; | |
109 | } | |
110 | ||
b0a4e7d8 | 111 | void libipw_networks_age(struct libipw_device *ieee, |
c3d72b96 DW |
112 | unsigned long age_secs) |
113 | { | |
b0a4e7d8 | 114 | struct libipw_network *network = NULL; |
c3d72b96 DW |
115 | unsigned long flags; |
116 | unsigned long age_jiffies = msecs_to_jiffies(age_secs * MSEC_PER_SEC); | |
117 | ||
118 | spin_lock_irqsave(&ieee->lock, flags); | |
119 | list_for_each_entry(network, &ieee->network_list, list) { | |
120 | network->last_scanned -= age_jiffies; | |
121 | } | |
122 | spin_unlock_irqrestore(&ieee->lock, flags); | |
123 | } | |
b0a4e7d8 | 124 | EXPORT_SYMBOL(libipw_networks_age); |
c3d72b96 | 125 | |
b0a4e7d8 | 126 | static void libipw_networks_initialize(struct libipw_device *ieee) |
b453872c JG |
127 | { |
128 | int i; | |
129 | ||
130 | INIT_LIST_HEAD(&ieee->network_free_list); | |
131 | INIT_LIST_HEAD(&ieee->network_list); | |
132 | for (i = 0; i < MAX_NETWORK_COUNT; i++) | |
0edd5b44 JG |
133 | list_add_tail(&ieee->networks[i].list, |
134 | &ieee->network_free_list); | |
b453872c JG |
135 | } |
136 | ||
b0a4e7d8 | 137 | int libipw_change_mtu(struct net_device *dev, int new_mtu) |
42a4cf95 | 138 | { |
b0a4e7d8 | 139 | if ((new_mtu < 68) || (new_mtu > LIBIPW_DATA_LEN)) |
42a4cf95 | 140 | return -EINVAL; |
141 | dev->mtu = new_mtu; | |
142 | return 0; | |
143 | } | |
b0a4e7d8 | 144 | EXPORT_SYMBOL(libipw_change_mtu); |
42a4cf95 | 145 | |
b8ecd988 | 146 | struct net_device *alloc_ieee80211(int sizeof_priv, int monitor) |
b453872c | 147 | { |
b0a4e7d8 | 148 | struct libipw_device *ieee; |
b453872c JG |
149 | struct net_device *dev; |
150 | int err; | |
151 | ||
b0a4e7d8 | 152 | LIBIPW_DEBUG_INFO("Initializing...\n"); |
b453872c | 153 | |
b0a4e7d8 | 154 | dev = alloc_etherdev(sizeof(struct libipw_device) + sizeof_priv); |
b453872c | 155 | if (!dev) { |
b0a4e7d8 | 156 | LIBIPW_ERROR("Unable to allocate network device.\n"); |
b453872c JG |
157 | goto failed; |
158 | } | |
159 | ieee = netdev_priv(dev); | |
b453872c JG |
160 | |
161 | ieee->dev = dev; | |
162 | ||
b8ecd988 JL |
163 | if (!monitor) { |
164 | ieee->wdev.wiphy = wiphy_new(&libipw_config_ops, 0); | |
165 | if (!ieee->wdev.wiphy) { | |
166 | LIBIPW_ERROR("Unable to allocate wiphy.\n"); | |
167 | goto failed_free_netdev; | |
168 | } | |
169 | ||
170 | ieee->dev->ieee80211_ptr = &ieee->wdev; | |
171 | ieee->wdev.iftype = NL80211_IFTYPE_STATION; | |
172 | ||
173 | /* Fill-out wiphy structure bits we know... Not enough info | |
174 | here to call set_wiphy_dev or set MAC address or channel info | |
175 | -- have to do that in ->ndo_init... */ | |
176 | ieee->wdev.wiphy->privid = libipw_wiphy_privid; | |
177 | ||
178 | ieee->wdev.wiphy->max_scan_ssids = 1; | |
179 | ieee->wdev.wiphy->max_scan_ie_len = 0; | |
180 | ieee->wdev.wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) | |
181 | | BIT(NL80211_IFTYPE_ADHOC); | |
182 | } | |
183 | ||
b0a4e7d8 | 184 | err = libipw_networks_allocate(ieee); |
b453872c | 185 | if (err) { |
b0a4e7d8 | 186 | LIBIPW_ERROR("Unable to allocate beacon storage: %d\n", err); |
b8ecd988 | 187 | goto failed_free_wiphy; |
b453872c | 188 | } |
b0a4e7d8 | 189 | libipw_networks_initialize(ieee); |
b453872c JG |
190 | |
191 | /* Default fragmentation threshold is maximum payload size */ | |
192 | ieee->fts = DEFAULT_FTS; | |
3cdd00c5 | 193 | ieee->rts = DEFAULT_FTS; |
b453872c JG |
194 | ieee->scan_age = DEFAULT_MAX_SCAN_AGE; |
195 | ieee->open_wep = 1; | |
196 | ||
197 | /* Default to enabling full open WEP with host based encrypt/decrypt */ | |
198 | ieee->host_encrypt = 1; | |
199 | ieee->host_decrypt = 1; | |
ccd0fda3 JK |
200 | ieee->host_mc_decrypt = 1; |
201 | ||
af901ca1 | 202 | /* Host fragmentation in Open mode. Default is enabled. |
1264fc04 JK |
203 | * Note: host fragmentation is always enabled if host encryption |
204 | * is enabled. For cards can do hardware encryption, they must do | |
205 | * hardware fragmentation as well. So we don't need a variable | |
206 | * like host_enc_frag. */ | |
207 | ieee->host_open_frag = 1; | |
0edd5b44 | 208 | ieee->ieee802_1x = 1; /* Default to supporting 802.1x */ |
b453872c | 209 | |
b453872c JG |
210 | spin_lock_init(&ieee->lock); |
211 | ||
2ba4b32e | 212 | lib80211_crypt_info_init(&ieee->crypt_info, dev->name, &ieee->lock); |
274bfb8d | 213 | |
0edd5b44 | 214 | ieee->wpa_enabled = 0; |
0edd5b44 JG |
215 | ieee->drop_unencrypted = 0; |
216 | ieee->privacy_invoked = 0; | |
b453872c JG |
217 | |
218 | return dev; | |
219 | ||
b8ecd988 JL |
220 | failed_free_wiphy: |
221 | if (!monitor) | |
222 | wiphy_free(ieee->wdev.wiphy); | |
d92a8e81 JL |
223 | failed_free_netdev: |
224 | free_netdev(dev); | |
225 | failed: | |
b453872c JG |
226 | return NULL; |
227 | } | |
228 | ||
b8ecd988 | 229 | void free_ieee80211(struct net_device *dev, int monitor) |
b453872c | 230 | { |
b0a4e7d8 | 231 | struct libipw_device *ieee = netdev_priv(dev); |
b453872c | 232 | |
2ba4b32e | 233 | lib80211_crypt_info_free(&ieee->crypt_info); |
b453872c | 234 | |
b0a4e7d8 | 235 | libipw_networks_free(ieee); |
b8ecd988 JL |
236 | |
237 | /* free cfg80211 resources */ | |
e6c5fc53 | 238 | if (!monitor) |
b8ecd988 | 239 | wiphy_free(ieee->wdev.wiphy); |
b8ecd988 | 240 | |
b453872c JG |
241 | free_netdev(dev); |
242 | } | |
243 | ||
e6c5fc53 ZY |
244 | void unregister_ieee80211(struct libipw_device *ieee) |
245 | { | |
246 | wiphy_unregister(ieee->wdev.wiphy); | |
247 | kfree(ieee->a_band.channels); | |
248 | kfree(ieee->bg_band.channels); | |
249 | } | |
250 | ||
3756162b | 251 | #ifdef CONFIG_LIBIPW_DEBUG |
b453872c JG |
252 | |
253 | static int debug = 0; | |
b0a4e7d8 JL |
254 | u32 libipw_debug_level = 0; |
255 | EXPORT_SYMBOL_GPL(libipw_debug_level); | |
256 | static struct proc_dir_entry *libipw_proc = NULL; | |
b453872c JG |
257 | |
258 | static int show_debug_level(char *page, char **start, off_t offset, | |
259 | int count, int *eof, void *data) | |
260 | { | |
b0a4e7d8 | 261 | return snprintf(page, count, "0x%08X\n", libipw_debug_level); |
b453872c JG |
262 | } |
263 | ||
0edd5b44 | 264 | static int store_debug_level(struct file *file, const char __user * buffer, |
b453872c JG |
265 | unsigned long count, void *data) |
266 | { | |
262d8e46 JK |
267 | char buf[] = "0x00000000\n"; |
268 | unsigned long len = min((unsigned long)sizeof(buf) - 1, count); | |
b453872c JG |
269 | unsigned long val; |
270 | ||
262d8e46 | 271 | if (copy_from_user(buf, buffer, len)) |
b453872c | 272 | return count; |
262d8e46 JK |
273 | buf[len] = 0; |
274 | if (sscanf(buf, "%li", &val) != 1) | |
b453872c JG |
275 | printk(KERN_INFO DRV_NAME |
276 | ": %s is not in hex or decimal form.\n", buf); | |
277 | else | |
b0a4e7d8 | 278 | libipw_debug_level = val; |
b453872c | 279 | |
262d8e46 | 280 | return strnlen(buf, len); |
b453872c | 281 | } |
3756162b | 282 | #endif /* CONFIG_LIBIPW_DEBUG */ |
b453872c | 283 | |
b0a4e7d8 | 284 | static int __init libipw_init(void) |
b453872c | 285 | { |
3756162b | 286 | #ifdef CONFIG_LIBIPW_DEBUG |
b453872c JG |
287 | struct proc_dir_entry *e; |
288 | ||
b0a4e7d8 JL |
289 | libipw_debug_level = debug; |
290 | libipw_proc = proc_mkdir(DRV_NAME, init_net.proc_net); | |
291 | if (libipw_proc == NULL) { | |
292 | LIBIPW_ERROR("Unable to create " DRV_NAME | |
b453872c JG |
293 | " proc directory\n"); |
294 | return -EIO; | |
295 | } | |
296 | e = create_proc_entry("debug_level", S_IFREG | S_IRUGO | S_IWUSR, | |
b0a4e7d8 | 297 | libipw_proc); |
b453872c | 298 | if (!e) { |
457c4cbc | 299 | remove_proc_entry(DRV_NAME, init_net.proc_net); |
b0a4e7d8 | 300 | libipw_proc = NULL; |
b453872c JG |
301 | return -EIO; |
302 | } | |
303 | e->read_proc = show_debug_level; | |
304 | e->write_proc = store_debug_level; | |
305 | e->data = NULL; | |
3756162b | 306 | #endif /* CONFIG_LIBIPW_DEBUG */ |
31696160 JK |
307 | |
308 | printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n"); | |
309 | printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n"); | |
b453872c JG |
310 | |
311 | return 0; | |
312 | } | |
313 | ||
b0a4e7d8 | 314 | static void __exit libipw_exit(void) |
b453872c | 315 | { |
3756162b | 316 | #ifdef CONFIG_LIBIPW_DEBUG |
b0a4e7d8 JL |
317 | if (libipw_proc) { |
318 | remove_proc_entry("debug_level", libipw_proc); | |
457c4cbc | 319 | remove_proc_entry(DRV_NAME, init_net.proc_net); |
b0a4e7d8 | 320 | libipw_proc = NULL; |
b453872c | 321 | } |
3756162b | 322 | #endif /* CONFIG_LIBIPW_DEBUG */ |
b453872c JG |
323 | } |
324 | ||
3756162b | 325 | #ifdef CONFIG_LIBIPW_DEBUG |
b453872c JG |
326 | #include <linux/moduleparam.h> |
327 | module_param(debug, int, 0444); | |
328 | MODULE_PARM_DESC(debug, "debug output mask"); | |
3756162b | 329 | #endif /* CONFIG_LIBIPW_DEBUG */ |
b453872c | 330 | |
b0a4e7d8 JL |
331 | module_exit(libipw_exit); |
332 | module_init(libipw_init); | |
b453872c JG |
333 | |
334 | EXPORT_SYMBOL(alloc_ieee80211); | |
335 | EXPORT_SYMBOL(free_ieee80211); | |
e6c5fc53 | 336 | EXPORT_SYMBOL(unregister_ieee80211); |