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b453872c JG |
1 | /******************************************************************************* |
2 | ||
3 | Copyright(c) 2004 Intel Corporation. All rights reserved. | |
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> | |
34 | #include <linux/config.h> | |
35 | #include <linux/errno.h> | |
36 | #include <linux/if_arp.h> | |
37 | #include <linux/in6.h> | |
38 | #include <linux/in.h> | |
39 | #include <linux/ip.h> | |
40 | #include <linux/kernel.h> | |
41 | #include <linux/module.h> | |
42 | #include <linux/netdevice.h> | |
b453872c JG |
43 | #include <linux/proc_fs.h> |
44 | #include <linux/skbuff.h> | |
45 | #include <linux/slab.h> | |
46 | #include <linux/tcp.h> | |
47 | #include <linux/types.h> | |
48 | #include <linux/version.h> | |
49 | #include <linux/wireless.h> | |
50 | #include <linux/etherdevice.h> | |
51 | #include <asm/uaccess.h> | |
52 | #include <net/arp.h> | |
53 | ||
54 | #include <net/ieee80211.h> | |
55 | ||
56 | MODULE_DESCRIPTION("802.11 data/management/control stack"); | |
57 | MODULE_AUTHOR("Copyright (C) 2004 Intel Corporation <jketreno@linux.intel.com>"); | |
58 | MODULE_LICENSE("GPL"); | |
59 | ||
60 | #define DRV_NAME "ieee80211" | |
61 | ||
62 | static inline int ieee80211_networks_allocate(struct ieee80211_device *ieee) | |
63 | { | |
64 | if (ieee->networks) | |
65 | return 0; | |
66 | ||
67 | ieee->networks = kmalloc( | |
68 | MAX_NETWORK_COUNT * sizeof(struct ieee80211_network), | |
69 | GFP_KERNEL); | |
70 | if (!ieee->networks) { | |
71 | printk(KERN_WARNING "%s: Out of memory allocating beacons\n", | |
72 | ieee->dev->name); | |
73 | return -ENOMEM; | |
74 | } | |
75 | ||
76 | memset(ieee->networks, 0, | |
77 | MAX_NETWORK_COUNT * sizeof(struct ieee80211_network)); | |
78 | ||
79 | return 0; | |
80 | } | |
81 | ||
82 | static inline void ieee80211_networks_free(struct ieee80211_device *ieee) | |
83 | { | |
84 | if (!ieee->networks) | |
85 | return; | |
86 | kfree(ieee->networks); | |
87 | ieee->networks = NULL; | |
88 | } | |
89 | ||
90 | static inline void ieee80211_networks_initialize(struct ieee80211_device *ieee) | |
91 | { | |
92 | int i; | |
93 | ||
94 | INIT_LIST_HEAD(&ieee->network_free_list); | |
95 | INIT_LIST_HEAD(&ieee->network_list); | |
96 | for (i = 0; i < MAX_NETWORK_COUNT; i++) | |
97 | list_add_tail(&ieee->networks[i].list, &ieee->network_free_list); | |
98 | } | |
99 | ||
100 | ||
101 | struct net_device *alloc_ieee80211(int sizeof_priv) | |
102 | { | |
103 | struct ieee80211_device *ieee; | |
104 | struct net_device *dev; | |
105 | int err; | |
106 | ||
107 | IEEE80211_DEBUG_INFO("Initializing...\n"); | |
108 | ||
109 | dev = alloc_etherdev(sizeof(struct ieee80211_device) + sizeof_priv); | |
110 | if (!dev) { | |
111 | IEEE80211_ERROR("Unable to network device.\n"); | |
112 | goto failed; | |
113 | } | |
114 | ieee = netdev_priv(dev); | |
115 | dev->hard_start_xmit = ieee80211_xmit; | |
116 | ||
117 | ieee->dev = dev; | |
118 | ||
119 | err = ieee80211_networks_allocate(ieee); | |
120 | if (err) { | |
121 | IEEE80211_ERROR("Unable to allocate beacon storage: %d\n", | |
122 | err); | |
123 | goto failed; | |
124 | } | |
125 | ieee80211_networks_initialize(ieee); | |
126 | ||
127 | /* Default fragmentation threshold is maximum payload size */ | |
128 | ieee->fts = DEFAULT_FTS; | |
129 | ieee->scan_age = DEFAULT_MAX_SCAN_AGE; | |
130 | ieee->open_wep = 1; | |
131 | ||
132 | /* Default to enabling full open WEP with host based encrypt/decrypt */ | |
133 | ieee->host_encrypt = 1; | |
134 | ieee->host_decrypt = 1; | |
135 | ieee->ieee802_1x = 1; /* Default to supporting 802.1x */ | |
136 | ||
137 | INIT_LIST_HEAD(&ieee->crypt_deinit_list); | |
138 | init_timer(&ieee->crypt_deinit_timer); | |
139 | ieee->crypt_deinit_timer.data = (unsigned long)ieee; | |
140 | ieee->crypt_deinit_timer.function = ieee80211_crypt_deinit_handler; | |
141 | ||
142 | spin_lock_init(&ieee->lock); | |
143 | ||
144 | ieee->wpa_enabled = 0; | |
145 | ieee->tkip_countermeasures = 0; | |
146 | ieee->drop_unencrypted = 0; | |
147 | ieee->privacy_invoked = 0; | |
148 | ieee->ieee802_1x = 1; | |
149 | ||
150 | return dev; | |
151 | ||
152 | failed: | |
153 | if (dev) | |
154 | free_netdev(dev); | |
155 | return NULL; | |
156 | } | |
157 | ||
158 | ||
159 | void free_ieee80211(struct net_device *dev) | |
160 | { | |
161 | struct ieee80211_device *ieee = netdev_priv(dev); | |
162 | ||
163 | int i; | |
164 | ||
165 | del_timer_sync(&ieee->crypt_deinit_timer); | |
166 | ieee80211_crypt_deinit_entries(ieee, 1); | |
167 | ||
168 | for (i = 0; i < WEP_KEYS; i++) { | |
169 | struct ieee80211_crypt_data *crypt = ieee->crypt[i]; | |
170 | if (crypt) { | |
171 | if (crypt->ops) { | |
172 | crypt->ops->deinit(crypt->priv); | |
173 | module_put(crypt->ops->owner); | |
174 | } | |
175 | kfree(crypt); | |
176 | ieee->crypt[i] = NULL; | |
177 | } | |
178 | } | |
179 | ||
180 | ieee80211_networks_free(ieee); | |
181 | free_netdev(dev); | |
182 | } | |
183 | ||
184 | #ifdef CONFIG_IEEE80211_DEBUG | |
185 | ||
186 | static int debug = 0; | |
187 | u32 ieee80211_debug_level = 0; | |
188 | struct proc_dir_entry *ieee80211_proc = NULL; | |
189 | ||
190 | static int show_debug_level(char *page, char **start, off_t offset, | |
191 | int count, int *eof, void *data) | |
192 | { | |
193 | return snprintf(page, count, "0x%08X\n", ieee80211_debug_level); | |
194 | } | |
195 | ||
695b5bc3 | 196 | static int store_debug_level(struct file *file, const char __user *buffer, |
b453872c JG |
197 | unsigned long count, void *data) |
198 | { | |
199 | char buf[] = "0x00000000"; | |
b453872c JG |
200 | char *p = (char *)buf; |
201 | unsigned long val; | |
202 | ||
695b5bc3 AV |
203 | if (count > sizeof(buf) - 1) |
204 | count = sizeof(buf) - 1; | |
205 | ||
206 | if (copy_from_user(buf, buffer, count)) | |
b453872c | 207 | return count; |
695b5bc3 AV |
208 | buf[count] = 0; |
209 | /* | |
210 | * what a FPOS... What, sscanf(buf, "%i", &val) would be too | |
211 | * scary? | |
212 | */ | |
b453872c JG |
213 | if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') { |
214 | p++; | |
215 | if (p[0] == 'x' || p[0] == 'X') | |
216 | p++; | |
217 | val = simple_strtoul(p, &p, 16); | |
218 | } else | |
219 | val = simple_strtoul(p, &p, 10); | |
220 | if (p == buf) | |
221 | printk(KERN_INFO DRV_NAME | |
222 | ": %s is not in hex or decimal form.\n", buf); | |
223 | else | |
224 | ieee80211_debug_level = val; | |
225 | ||
695b5bc3 | 226 | return strlen(buf); |
b453872c JG |
227 | } |
228 | ||
229 | static int __init ieee80211_init(void) | |
230 | { | |
231 | struct proc_dir_entry *e; | |
232 | ||
233 | ieee80211_debug_level = debug; | |
234 | ieee80211_proc = create_proc_entry(DRV_NAME, S_IFDIR, proc_net); | |
235 | if (ieee80211_proc == NULL) { | |
236 | IEEE80211_ERROR("Unable to create " DRV_NAME | |
237 | " proc directory\n"); | |
238 | return -EIO; | |
239 | } | |
240 | e = create_proc_entry("debug_level", S_IFREG | S_IRUGO | S_IWUSR, | |
241 | ieee80211_proc); | |
242 | if (!e) { | |
243 | remove_proc_entry(DRV_NAME, proc_net); | |
244 | ieee80211_proc = NULL; | |
245 | return -EIO; | |
246 | } | |
247 | e->read_proc = show_debug_level; | |
248 | e->write_proc = store_debug_level; | |
249 | e->data = NULL; | |
250 | ||
251 | return 0; | |
252 | } | |
253 | ||
254 | static void __exit ieee80211_exit(void) | |
255 | { | |
256 | if (ieee80211_proc) { | |
257 | remove_proc_entry("debug_level", ieee80211_proc); | |
258 | remove_proc_entry(DRV_NAME, proc_net); | |
259 | ieee80211_proc = NULL; | |
260 | } | |
261 | } | |
262 | ||
263 | #include <linux/moduleparam.h> | |
264 | module_param(debug, int, 0444); | |
265 | MODULE_PARM_DESC(debug, "debug output mask"); | |
266 | ||
267 | ||
268 | module_exit(ieee80211_exit); | |
269 | module_init(ieee80211_init); | |
270 | #endif | |
271 | ||
e88187ee JB |
272 | |
273 | const char *escape_essid(const char *essid, u8 essid_len) { | |
274 | static char escaped[IW_ESSID_MAX_SIZE * 2 + 1]; | |
275 | const char *s = essid; | |
276 | char *d = escaped; | |
277 | ||
278 | if (ieee80211_is_empty_essid(essid, essid_len)) { | |
279 | memcpy(escaped, "<hidden>", sizeof("<hidden>")); | |
280 | return escaped; | |
281 | } | |
282 | ||
283 | essid_len = min(essid_len, (u8)IW_ESSID_MAX_SIZE); | |
284 | while (essid_len--) { | |
285 | if (*s == '\0') { | |
286 | *d++ = '\\'; | |
287 | *d++ = '0'; | |
288 | s++; | |
289 | } else { | |
290 | *d++ = *s++; | |
291 | } | |
292 | } | |
293 | *d = '\0'; | |
294 | return escaped; | |
295 | } | |
296 | ||
b453872c JG |
297 | EXPORT_SYMBOL(alloc_ieee80211); |
298 | EXPORT_SYMBOL(free_ieee80211); | |
e88187ee | 299 | EXPORT_SYMBOL(escape_essid); |