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 "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 void ieee80211_networks_age(struct ieee80211_device *ieee,
109 unsigned long age_secs)
111 struct ieee80211_network *network = NULL;
113 unsigned long age_jiffies = msecs_to_jiffies(age_secs * MSEC_PER_SEC);
115 spin_lock_irqsave(&ieee->lock, flags);
116 list_for_each_entry(network, &ieee->network_list, list) {
117 network->last_scanned -= age_jiffies;
119 spin_unlock_irqrestore(&ieee->lock, flags);
121 EXPORT_SYMBOL(ieee80211_networks_age);
123 static void ieee80211_networks_initialize(struct ieee80211_device *ieee)
127 INIT_LIST_HEAD(&ieee->network_free_list);
128 INIT_LIST_HEAD(&ieee->network_list);
129 for (i = 0; i < MAX_NETWORK_COUNT; i++)
130 list_add_tail(&ieee->networks[i].list,
131 &ieee->network_free_list);
134 int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
136 if ((new_mtu < 68) || (new_mtu > IEEE80211_DATA_LEN))
141 EXPORT_SYMBOL(ieee80211_change_mtu);
143 struct net_device *alloc_ieee80211(int sizeof_priv)
145 struct ieee80211_device *ieee;
146 struct net_device *dev;
149 IEEE80211_DEBUG_INFO("Initializing...\n");
151 dev = alloc_etherdev(sizeof(struct ieee80211_device) + sizeof_priv);
153 IEEE80211_ERROR("Unable to allocate network device.\n");
156 ieee = netdev_priv(dev);
160 err = ieee80211_networks_allocate(ieee);
162 IEEE80211_ERROR("Unable to allocate beacon storage: %d\n", err);
163 goto failed_free_netdev;
165 ieee80211_networks_initialize(ieee);
167 /* Default fragmentation threshold is maximum payload size */
168 ieee->fts = DEFAULT_FTS;
169 ieee->rts = DEFAULT_FTS;
170 ieee->scan_age = DEFAULT_MAX_SCAN_AGE;
173 /* Default to enabling full open WEP with host based encrypt/decrypt */
174 ieee->host_encrypt = 1;
175 ieee->host_decrypt = 1;
176 ieee->host_mc_decrypt = 1;
178 /* Host fragementation in Open mode. Default is enabled.
179 * Note: host fragmentation is always enabled if host encryption
180 * is enabled. For cards can do hardware encryption, they must do
181 * hardware fragmentation as well. So we don't need a variable
182 * like host_enc_frag. */
183 ieee->host_open_frag = 1;
184 ieee->ieee802_1x = 1; /* Default to supporting 802.1x */
186 spin_lock_init(&ieee->lock);
188 lib80211_crypt_info_init(&ieee->crypt_info, dev->name, &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);
206 lib80211_crypt_info_free(&ieee->crypt_info);
208 ieee80211_networks_free(ieee);
212 #ifdef CONFIG_LIBIPW_DEBUG
214 static int debug = 0;
215 u32 ieee80211_debug_level = 0;
216 EXPORT_SYMBOL_GPL(ieee80211_debug_level);
217 static struct proc_dir_entry *ieee80211_proc = NULL;
219 static int show_debug_level(char *page, char **start, off_t offset,
220 int count, int *eof, void *data)
222 return snprintf(page, count, "0x%08X\n", ieee80211_debug_level);
225 static int store_debug_level(struct file *file, const char __user * buffer,
226 unsigned long count, void *data)
228 char buf[] = "0x00000000\n";
229 unsigned long len = min((unsigned long)sizeof(buf) - 1, count);
232 if (copy_from_user(buf, buffer, len))
235 if (sscanf(buf, "%li", &val) != 1)
236 printk(KERN_INFO DRV_NAME
237 ": %s is not in hex or decimal form.\n", buf);
239 ieee80211_debug_level = val;
241 return strnlen(buf, len);
243 #endif /* CONFIG_LIBIPW_DEBUG */
245 static int __init ieee80211_init(void)
247 #ifdef CONFIG_LIBIPW_DEBUG
248 struct proc_dir_entry *e;
250 ieee80211_debug_level = debug;
251 ieee80211_proc = proc_mkdir(DRV_NAME, init_net.proc_net);
252 if (ieee80211_proc == NULL) {
253 IEEE80211_ERROR("Unable to create " DRV_NAME
254 " proc directory\n");
257 e = create_proc_entry("debug_level", S_IFREG | S_IRUGO | S_IWUSR,
260 remove_proc_entry(DRV_NAME, init_net.proc_net);
261 ieee80211_proc = NULL;
264 e->read_proc = show_debug_level;
265 e->write_proc = store_debug_level;
267 #endif /* CONFIG_LIBIPW_DEBUG */
269 printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
270 printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
275 static void __exit ieee80211_exit(void)
277 #ifdef CONFIG_LIBIPW_DEBUG
278 if (ieee80211_proc) {
279 remove_proc_entry("debug_level", ieee80211_proc);
280 remove_proc_entry(DRV_NAME, init_net.proc_net);
281 ieee80211_proc = NULL;
283 #endif /* CONFIG_LIBIPW_DEBUG */
286 #ifdef CONFIG_LIBIPW_DEBUG
287 #include <linux/moduleparam.h>
288 module_param(debug, int, 0444);
289 MODULE_PARM_DESC(debug, "debug output mask");
290 #endif /* CONFIG_LIBIPW_DEBUG */
292 module_exit(ieee80211_exit);
293 module_init(ieee80211_init);
295 EXPORT_SYMBOL(alloc_ieee80211);
296 EXPORT_SYMBOL(free_ieee80211);