1 /*******************************************************************************
3 Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
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
9 Copyright (c) 2002-2003, Jouni Malinen <j@w1.fi>
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.
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
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.
24 The full GNU General Public License is included in this distribution in the
28 James P. Ketrenos <ipw2100-admin@linux.intel.com>
29 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
31 *******************************************************************************/
33 #include <linux/compiler.h>
34 #include <linux/errno.h>
35 #include <linux/if_arp.h>
36 #include <linux/in6.h>
39 #include <linux/kernel.h>
40 #include <linux/module.h>
41 #include <linux/netdevice.h>
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>
47 #include <linux/wireless.h>
48 #include <linux/etherdevice.h>
49 #include <asm/uaccess.h>
50 #include <net/net_namespace.h>
53 #include <net/ieee80211.h>
55 #define DRV_DESCRIPTION "802.11 data/management/control stack"
56 #define DRV_NAME "ieee80211"
57 #define DRV_VERSION IEEE80211_VERSION
58 #define DRV_COPYRIGHT "Copyright (C) 2004-2005 Intel Corporation <jketreno@linux.intel.com>"
60 MODULE_VERSION(DRV_VERSION);
61 MODULE_DESCRIPTION(DRV_DESCRIPTION);
62 MODULE_AUTHOR(DRV_COPYRIGHT);
63 MODULE_LICENSE("GPL");
65 static int ieee80211_networks_allocate(struct ieee80211_device *ieee)
71 kzalloc(MAX_NETWORK_COUNT * sizeof(struct ieee80211_network),
73 if (!ieee->networks) {
74 printk(KERN_WARNING "%s: Out of memory allocating beacons\n",
82 void ieee80211_network_reset(struct ieee80211_network *network)
87 if (network->ibss_dfs) {
88 kfree(network->ibss_dfs);
89 network->ibss_dfs = NULL;
93 static inline void ieee80211_networks_free(struct ieee80211_device *ieee)
100 for (i = 0; i < MAX_NETWORK_COUNT; i++)
101 if (ieee->networks[i].ibss_dfs)
102 kfree(ieee->networks[i].ibss_dfs);
104 kfree(ieee->networks);
105 ieee->networks = NULL;
108 static void ieee80211_networks_initialize(struct ieee80211_device *ieee)
112 INIT_LIST_HEAD(&ieee->network_free_list);
113 INIT_LIST_HEAD(&ieee->network_list);
114 for (i = 0; i < MAX_NETWORK_COUNT; i++)
115 list_add_tail(&ieee->networks[i].list,
116 &ieee->network_free_list);
119 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
121 if ((new_mtu < 68) || (new_mtu > IEEE80211_DATA_LEN))
127 static struct net_device_stats *ieee80211_generic_get_stats(
128 struct net_device *dev)
130 struct ieee80211_device *ieee = netdev_priv(dev);
134 struct net_device *alloc_ieee80211(int sizeof_priv)
136 struct ieee80211_device *ieee;
137 struct net_device *dev;
140 IEEE80211_DEBUG_INFO("Initializing...\n");
142 dev = alloc_etherdev(sizeof(struct ieee80211_device) + sizeof_priv);
144 IEEE80211_ERROR("Unable to allocate network device.\n");
147 ieee = netdev_priv(dev);
148 dev->hard_start_xmit = ieee80211_xmit;
149 dev->change_mtu = ieee80211_change_mtu;
151 /* Drivers are free to override this if the generic implementation
152 * does not meet their needs. */
153 dev->get_stats = ieee80211_generic_get_stats;
157 err = ieee80211_networks_allocate(ieee);
159 IEEE80211_ERROR("Unable to allocate beacon storage: %d\n", err);
162 ieee80211_networks_initialize(ieee);
164 /* Default fragmentation threshold is maximum payload size */
165 ieee->fts = DEFAULT_FTS;
166 ieee->rts = DEFAULT_FTS;
167 ieee->scan_age = DEFAULT_MAX_SCAN_AGE;
170 /* Default to enabling full open WEP with host based encrypt/decrypt */
171 ieee->host_encrypt = 1;
172 ieee->host_decrypt = 1;
173 ieee->host_mc_decrypt = 1;
175 /* Host fragementation in Open mode. Default is enabled.
176 * Note: host fragmentation is always enabled if host encryption
177 * is enabled. For cards can do hardware encryption, they must do
178 * hardware fragmentation as well. So we don't need a variable
179 * like host_enc_frag. */
180 ieee->host_open_frag = 1;
181 ieee->ieee802_1x = 1; /* Default to supporting 802.1x */
183 INIT_LIST_HEAD(&ieee->crypt_deinit_list);
184 setup_timer(&ieee->crypt_deinit_timer, ieee80211_crypt_deinit_handler,
185 (unsigned long)ieee);
186 ieee->crypt_quiesced = 0;
188 spin_lock_init(&ieee->lock);
190 ieee->wpa_enabled = 0;
191 ieee->drop_unencrypted = 0;
192 ieee->privacy_invoked = 0;
202 void free_ieee80211(struct net_device *dev)
204 struct ieee80211_device *ieee = netdev_priv(dev);
208 ieee80211_crypt_quiescing(ieee);
209 del_timer_sync(&ieee->crypt_deinit_timer);
210 ieee80211_crypt_deinit_entries(ieee, 1);
212 for (i = 0; i < WEP_KEYS; i++) {
213 struct ieee80211_crypt_data *crypt = ieee->crypt[i];
216 crypt->ops->deinit(crypt->priv);
217 module_put(crypt->ops->owner);
220 ieee->crypt[i] = NULL;
224 ieee80211_networks_free(ieee);
228 #ifdef CONFIG_IEEE80211_DEBUG
230 static int debug = 0;
231 u32 ieee80211_debug_level = 0;
232 EXPORT_SYMBOL_GPL(ieee80211_debug_level);
233 static struct proc_dir_entry *ieee80211_proc = NULL;
235 static int show_debug_level(char *page, char **start, off_t offset,
236 int count, int *eof, void *data)
238 return snprintf(page, count, "0x%08X\n", ieee80211_debug_level);
241 static int store_debug_level(struct file *file, const char __user * buffer,
242 unsigned long count, void *data)
244 char buf[] = "0x00000000\n";
245 unsigned long len = min((unsigned long)sizeof(buf) - 1, count);
248 if (copy_from_user(buf, buffer, len))
251 if (sscanf(buf, "%li", &val) != 1)
252 printk(KERN_INFO DRV_NAME
253 ": %s is not in hex or decimal form.\n", buf);
255 ieee80211_debug_level = val;
257 return strnlen(buf, len);
259 #endif /* CONFIG_IEEE80211_DEBUG */
261 static int __init ieee80211_init(void)
263 #ifdef CONFIG_IEEE80211_DEBUG
264 struct proc_dir_entry *e;
266 ieee80211_debug_level = debug;
267 ieee80211_proc = proc_mkdir(DRV_NAME, init_net.proc_net);
268 if (ieee80211_proc == NULL) {
269 IEEE80211_ERROR("Unable to create " DRV_NAME
270 " proc directory\n");
273 e = create_proc_entry("debug_level", S_IFREG | S_IRUGO | S_IWUSR,
276 remove_proc_entry(DRV_NAME, init_net.proc_net);
277 ieee80211_proc = NULL;
280 e->read_proc = show_debug_level;
281 e->write_proc = store_debug_level;
283 #endif /* CONFIG_IEEE80211_DEBUG */
285 printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
286 printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
291 static void __exit ieee80211_exit(void)
293 #ifdef CONFIG_IEEE80211_DEBUG
294 if (ieee80211_proc) {
295 remove_proc_entry("debug_level", ieee80211_proc);
296 remove_proc_entry(DRV_NAME, init_net.proc_net);
297 ieee80211_proc = NULL;
299 #endif /* CONFIG_IEEE80211_DEBUG */
302 #ifdef CONFIG_IEEE80211_DEBUG
303 #include <linux/moduleparam.h>
304 module_param(debug, int, 0444);
305 MODULE_PARM_DESC(debug, "debug output mask");
306 #endif /* CONFIG_IEEE80211_DEBUG */
308 module_exit(ieee80211_exit);
309 module_init(ieee80211_init);
311 const char *escape_essid(const char *essid, u8 essid_len)
313 static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
314 const char *s = essid;
317 if (ieee80211_is_empty_essid(essid, essid_len)) {
318 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
322 essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
323 while (essid_len--) {
336 EXPORT_SYMBOL(alloc_ieee80211);
337 EXPORT_SYMBOL(free_ieee80211);
338 EXPORT_SYMBOL(escape_essid);