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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 | |
8 | <jkmaline@cc.hut.fi> | |
9 | Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi> | |
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: | |
28 | James P. Ketrenos <ipw2100-admin@linux.intel.com> | |
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> | |
50 | #include <net/arp.h> | |
51 | ||
52 | #include <net/ieee80211.h> | |
53 | ||
31696160 JK |
54 | #define DRV_DESCRIPTION "802.11 data/management/control stack" |
55 | #define DRV_NAME "ieee80211" | |
56 | #define DRV_VERSION IEEE80211_VERSION | |
57 | #define DRV_COPYRIGHT "Copyright (C) 2004-2005 Intel Corporation <jketreno@linux.intel.com>" | |
58 | ||
59 | MODULE_VERSION(DRV_VERSION); | |
60 | MODULE_DESCRIPTION(DRV_DESCRIPTION); | |
61 | MODULE_AUTHOR(DRV_COPYRIGHT); | |
b453872c JG |
62 | MODULE_LICENSE("GPL"); |
63 | ||
858119e1 | 64 | static int ieee80211_networks_allocate(struct ieee80211_device *ieee) |
b453872c JG |
65 | { |
66 | if (ieee->networks) | |
67 | return 0; | |
68 | ||
0edd5b44 | 69 | ieee->networks = |
571d6eee | 70 | kzalloc(MAX_NETWORK_COUNT * sizeof(struct ieee80211_network), |
0edd5b44 | 71 | GFP_KERNEL); |
b453872c JG |
72 | if (!ieee->networks) { |
73 | printk(KERN_WARNING "%s: Out of memory allocating beacons\n", | |
74 | ieee->dev->name); | |
75 | return -ENOMEM; | |
76 | } | |
77 | ||
b453872c JG |
78 | return 0; |
79 | } | |
80 | ||
15f38598 ZY |
81 | void ieee80211_network_reset(struct ieee80211_network *network) |
82 | { | |
83 | if (!network) | |
84 | return; | |
85 | ||
86 | if (network->ibss_dfs) { | |
87 | kfree(network->ibss_dfs); | |
88 | network->ibss_dfs = NULL; | |
89 | } | |
90 | } | |
91 | ||
b453872c JG |
92 | static inline void ieee80211_networks_free(struct ieee80211_device *ieee) |
93 | { | |
15f38598 ZY |
94 | int i; |
95 | ||
b453872c JG |
96 | if (!ieee->networks) |
97 | return; | |
15f38598 ZY |
98 | |
99 | for (i = 0; i < MAX_NETWORK_COUNT; i++) | |
100 | if (ieee->networks[i].ibss_dfs) | |
101 | kfree(ieee->networks[i].ibss_dfs); | |
102 | ||
b453872c JG |
103 | kfree(ieee->networks); |
104 | ieee->networks = NULL; | |
105 | } | |
106 | ||
858119e1 | 107 | static void ieee80211_networks_initialize(struct ieee80211_device *ieee) |
b453872c JG |
108 | { |
109 | int i; | |
110 | ||
111 | INIT_LIST_HEAD(&ieee->network_free_list); | |
112 | INIT_LIST_HEAD(&ieee->network_list); | |
113 | for (i = 0; i < MAX_NETWORK_COUNT; i++) | |
0edd5b44 JG |
114 | list_add_tail(&ieee->networks[i].list, |
115 | &ieee->network_free_list); | |
b453872c JG |
116 | } |
117 | ||
42a4cf95 | 118 | static int ieee80211_change_mtu(struct net_device *dev, int new_mtu) |
119 | { | |
120 | if ((new_mtu < 68) || (new_mtu > IEEE80211_DATA_LEN)) | |
121 | return -EINVAL; | |
122 | dev->mtu = new_mtu; | |
123 | return 0; | |
124 | } | |
125 | ||
718cc4ca DD |
126 | static struct net_device_stats *ieee80211_generic_get_stats( |
127 | struct net_device *dev) | |
128 | { | |
129 | struct ieee80211_device *ieee = netdev_priv(dev); | |
130 | return &ieee->stats; | |
131 | } | |
132 | ||
b453872c JG |
133 | struct net_device *alloc_ieee80211(int sizeof_priv) |
134 | { | |
135 | struct ieee80211_device *ieee; | |
136 | struct net_device *dev; | |
137 | int err; | |
138 | ||
139 | IEEE80211_DEBUG_INFO("Initializing...\n"); | |
140 | ||
141 | dev = alloc_etherdev(sizeof(struct ieee80211_device) + sizeof_priv); | |
142 | if (!dev) { | |
143 | IEEE80211_ERROR("Unable to network device.\n"); | |
144 | goto failed; | |
145 | } | |
146 | ieee = netdev_priv(dev); | |
147 | dev->hard_start_xmit = ieee80211_xmit; | |
42a4cf95 | 148 | dev->change_mtu = ieee80211_change_mtu; |
b453872c | 149 | |
718cc4ca DD |
150 | /* Drivers are free to override this if the generic implementation |
151 | * does not meet their needs. */ | |
152 | dev->get_stats = ieee80211_generic_get_stats; | |
153 | ||
b453872c JG |
154 | ieee->dev = dev; |
155 | ||
156 | err = ieee80211_networks_allocate(ieee); | |
157 | if (err) { | |
0edd5b44 | 158 | IEEE80211_ERROR("Unable to allocate beacon storage: %d\n", err); |
b453872c JG |
159 | goto failed; |
160 | } | |
161 | ieee80211_networks_initialize(ieee); | |
162 | ||
163 | /* Default fragmentation threshold is maximum payload size */ | |
164 | ieee->fts = DEFAULT_FTS; | |
3cdd00c5 | 165 | ieee->rts = DEFAULT_FTS; |
b453872c JG |
166 | ieee->scan_age = DEFAULT_MAX_SCAN_AGE; |
167 | ieee->open_wep = 1; | |
168 | ||
169 | /* Default to enabling full open WEP with host based encrypt/decrypt */ | |
170 | ieee->host_encrypt = 1; | |
171 | ieee->host_decrypt = 1; | |
ccd0fda3 JK |
172 | ieee->host_mc_decrypt = 1; |
173 | ||
1264fc04 JK |
174 | /* Host fragementation in Open mode. Default is enabled. |
175 | * Note: host fragmentation is always enabled if host encryption | |
176 | * is enabled. For cards can do hardware encryption, they must do | |
177 | * hardware fragmentation as well. So we don't need a variable | |
178 | * like host_enc_frag. */ | |
179 | ieee->host_open_frag = 1; | |
0edd5b44 | 180 | ieee->ieee802_1x = 1; /* Default to supporting 802.1x */ |
b453872c JG |
181 | |
182 | INIT_LIST_HEAD(&ieee->crypt_deinit_list); | |
183 | init_timer(&ieee->crypt_deinit_timer); | |
184 | ieee->crypt_deinit_timer.data = (unsigned long)ieee; | |
185 | ieee->crypt_deinit_timer.function = ieee80211_crypt_deinit_handler; | |
0ad0c3c6 | 186 | ieee->crypt_quiesced = 0; |
b453872c JG |
187 | |
188 | spin_lock_init(&ieee->lock); | |
189 | ||
0edd5b44 | 190 | ieee->wpa_enabled = 0; |
0edd5b44 JG |
191 | ieee->drop_unencrypted = 0; |
192 | ieee->privacy_invoked = 0; | |
b453872c JG |
193 | |
194 | return dev; | |
195 | ||
0edd5b44 | 196 | failed: |
b453872c JG |
197 | if (dev) |
198 | free_netdev(dev); | |
199 | return NULL; | |
200 | } | |
201 | ||
b453872c JG |
202 | void free_ieee80211(struct net_device *dev) |
203 | { | |
204 | struct ieee80211_device *ieee = netdev_priv(dev); | |
205 | ||
206 | int i; | |
207 | ||
0ad0c3c6 | 208 | ieee80211_crypt_quiescing(ieee); |
b453872c JG |
209 | del_timer_sync(&ieee->crypt_deinit_timer); |
210 | ieee80211_crypt_deinit_entries(ieee, 1); | |
211 | ||
212 | for (i = 0; i < WEP_KEYS; i++) { | |
213 | struct ieee80211_crypt_data *crypt = ieee->crypt[i]; | |
214 | if (crypt) { | |
215 | if (crypt->ops) { | |
216 | crypt->ops->deinit(crypt->priv); | |
217 | module_put(crypt->ops->owner); | |
218 | } | |
219 | kfree(crypt); | |
220 | ieee->crypt[i] = NULL; | |
221 | } | |
222 | } | |
223 | ||
224 | ieee80211_networks_free(ieee); | |
225 | free_netdev(dev); | |
226 | } | |
227 | ||
228 | #ifdef CONFIG_IEEE80211_DEBUG | |
229 | ||
230 | static int debug = 0; | |
231 | u32 ieee80211_debug_level = 0; | |
b7cffb02 | 232 | static struct proc_dir_entry *ieee80211_proc = NULL; |
b453872c JG |
233 | |
234 | static int show_debug_level(char *page, char **start, off_t offset, | |
235 | int count, int *eof, void *data) | |
236 | { | |
237 | return snprintf(page, count, "0x%08X\n", ieee80211_debug_level); | |
238 | } | |
239 | ||
0edd5b44 | 240 | static int store_debug_level(struct file *file, const char __user * buffer, |
b453872c JG |
241 | unsigned long count, void *data) |
242 | { | |
262d8e46 JK |
243 | char buf[] = "0x00000000\n"; |
244 | unsigned long len = min((unsigned long)sizeof(buf) - 1, count); | |
b453872c JG |
245 | unsigned long val; |
246 | ||
262d8e46 | 247 | if (copy_from_user(buf, buffer, len)) |
b453872c | 248 | return count; |
262d8e46 JK |
249 | buf[len] = 0; |
250 | if (sscanf(buf, "%li", &val) != 1) | |
b453872c JG |
251 | printk(KERN_INFO DRV_NAME |
252 | ": %s is not in hex or decimal form.\n", buf); | |
253 | else | |
254 | ieee80211_debug_level = val; | |
255 | ||
262d8e46 | 256 | return strnlen(buf, len); |
b453872c | 257 | } |
31696160 | 258 | #endif /* CONFIG_IEEE80211_DEBUG */ |
b453872c JG |
259 | |
260 | static int __init ieee80211_init(void) | |
261 | { | |
31696160 | 262 | #ifdef CONFIG_IEEE80211_DEBUG |
b453872c JG |
263 | struct proc_dir_entry *e; |
264 | ||
265 | ieee80211_debug_level = debug; | |
66600221 | 266 | ieee80211_proc = proc_mkdir(DRV_NAME, proc_net); |
b453872c JG |
267 | if (ieee80211_proc == NULL) { |
268 | IEEE80211_ERROR("Unable to create " DRV_NAME | |
269 | " proc directory\n"); | |
270 | return -EIO; | |
271 | } | |
272 | e = create_proc_entry("debug_level", S_IFREG | S_IRUGO | S_IWUSR, | |
273 | ieee80211_proc); | |
274 | if (!e) { | |
275 | remove_proc_entry(DRV_NAME, proc_net); | |
276 | ieee80211_proc = NULL; | |
277 | return -EIO; | |
278 | } | |
279 | e->read_proc = show_debug_level; | |
280 | e->write_proc = store_debug_level; | |
281 | e->data = NULL; | |
31696160 JK |
282 | #endif /* CONFIG_IEEE80211_DEBUG */ |
283 | ||
284 | printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n"); | |
285 | printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n"); | |
b453872c JG |
286 | |
287 | return 0; | |
288 | } | |
289 | ||
290 | static void __exit ieee80211_exit(void) | |
291 | { | |
31696160 | 292 | #ifdef CONFIG_IEEE80211_DEBUG |
b453872c JG |
293 | if (ieee80211_proc) { |
294 | remove_proc_entry("debug_level", ieee80211_proc); | |
295 | remove_proc_entry(DRV_NAME, proc_net); | |
296 | ieee80211_proc = NULL; | |
297 | } | |
31696160 | 298 | #endif /* CONFIG_IEEE80211_DEBUG */ |
b453872c JG |
299 | } |
300 | ||
31696160 | 301 | #ifdef CONFIG_IEEE80211_DEBUG |
b453872c JG |
302 | #include <linux/moduleparam.h> |
303 | module_param(debug, int, 0444); | |
304 | MODULE_PARM_DESC(debug, "debug output mask"); | |
31696160 | 305 | #endif /* CONFIG_IEEE80211_DEBUG */ |
b453872c | 306 | |
b453872c JG |
307 | module_exit(ieee80211_exit); |
308 | module_init(ieee80211_init); | |
b453872c | 309 | |
0edd5b44 JG |
310 | const char *escape_essid(const char *essid, u8 essid_len) |
311 | { | |
e88187ee JB |
312 | static char escaped[IW_ESSID_MAX_SIZE * 2 + 1]; |
313 | const char *s = essid; | |
314 | char *d = escaped; | |
315 | ||
316 | if (ieee80211_is_empty_essid(essid, essid_len)) { | |
317 | memcpy(escaped, "<hidden>", sizeof("<hidden>")); | |
318 | return escaped; | |
319 | } | |
320 | ||
0edd5b44 | 321 | essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE); |
e88187ee JB |
322 | while (essid_len--) { |
323 | if (*s == '\0') { | |
324 | *d++ = '\\'; | |
325 | *d++ = '0'; | |
326 | s++; | |
327 | } else { | |
328 | *d++ = *s++; | |
329 | } | |
330 | } | |
331 | *d = '\0'; | |
332 | return escaped; | |
333 | } | |
334 | ||
b453872c JG |
335 | EXPORT_SYMBOL(alloc_ieee80211); |
336 | EXPORT_SYMBOL(free_ieee80211); | |
e88187ee | 337 | EXPORT_SYMBOL(escape_essid); |