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);
157 #ifdef CONFIG_COMPAT_NET_DEV_OPS
158 dev->hard_start_xmit = ieee80211_xmit;
159 dev->change_mtu = ieee80211_change_mtu;
164 err = ieee80211_networks_allocate(ieee);
166 IEEE80211_ERROR("Unable to allocate beacon storage: %d\n", err);
167 goto failed_free_netdev;
169 ieee80211_networks_initialize(ieee);
171 /* Default fragmentation threshold is maximum payload size */
172 ieee->fts = DEFAULT_FTS;
173 ieee->rts = DEFAULT_FTS;
174 ieee->scan_age = DEFAULT_MAX_SCAN_AGE;
177 /* Default to enabling full open WEP with host based encrypt/decrypt */
178 ieee->host_encrypt = 1;
179 ieee->host_decrypt = 1;
180 ieee->host_mc_decrypt = 1;
182 /* Host fragementation in Open mode. Default is enabled.
183 * Note: host fragmentation is always enabled if host encryption
184 * is enabled. For cards can do hardware encryption, they must do
185 * hardware fragmentation as well. So we don't need a variable
186 * like host_enc_frag. */
187 ieee->host_open_frag = 1;
188 ieee->ieee802_1x = 1; /* Default to supporting 802.1x */
190 spin_lock_init(&ieee->lock);
192 lib80211_crypt_info_init(&ieee->crypt_info, dev->name, &ieee->lock);
194 ieee->wpa_enabled = 0;
195 ieee->drop_unencrypted = 0;
196 ieee->privacy_invoked = 0;
206 void free_ieee80211(struct net_device *dev)
208 struct ieee80211_device *ieee = netdev_priv(dev);
210 lib80211_crypt_info_free(&ieee->crypt_info);
212 ieee80211_networks_free(ieee);
216 #ifdef CONFIG_LIBIPW_DEBUG
218 static int debug = 0;
219 u32 ieee80211_debug_level = 0;
220 EXPORT_SYMBOL_GPL(ieee80211_debug_level);
221 static struct proc_dir_entry *ieee80211_proc = NULL;
223 static int show_debug_level(char *page, char **start, off_t offset,
224 int count, int *eof, void *data)
226 return snprintf(page, count, "0x%08X\n", ieee80211_debug_level);
229 static int store_debug_level(struct file *file, const char __user * buffer,
230 unsigned long count, void *data)
232 char buf[] = "0x00000000\n";
233 unsigned long len = min((unsigned long)sizeof(buf) - 1, count);
236 if (copy_from_user(buf, buffer, len))
239 if (sscanf(buf, "%li", &val) != 1)
240 printk(KERN_INFO DRV_NAME
241 ": %s is not in hex or decimal form.\n", buf);
243 ieee80211_debug_level = val;
245 return strnlen(buf, len);
247 #endif /* CONFIG_LIBIPW_DEBUG */
249 static int __init ieee80211_init(void)
251 #ifdef CONFIG_LIBIPW_DEBUG
252 struct proc_dir_entry *e;
254 ieee80211_debug_level = debug;
255 ieee80211_proc = proc_mkdir(DRV_NAME, init_net.proc_net);
256 if (ieee80211_proc == NULL) {
257 IEEE80211_ERROR("Unable to create " DRV_NAME
258 " proc directory\n");
261 e = create_proc_entry("debug_level", S_IFREG | S_IRUGO | S_IWUSR,
264 remove_proc_entry(DRV_NAME, init_net.proc_net);
265 ieee80211_proc = NULL;
268 e->read_proc = show_debug_level;
269 e->write_proc = store_debug_level;
271 #endif /* CONFIG_LIBIPW_DEBUG */
273 printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
274 printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
279 static void __exit ieee80211_exit(void)
281 #ifdef CONFIG_LIBIPW_DEBUG
282 if (ieee80211_proc) {
283 remove_proc_entry("debug_level", ieee80211_proc);
284 remove_proc_entry(DRV_NAME, init_net.proc_net);
285 ieee80211_proc = NULL;
287 #endif /* CONFIG_LIBIPW_DEBUG */
290 #ifdef CONFIG_LIBIPW_DEBUG
291 #include <linux/moduleparam.h>
292 module_param(debug, int, 0444);
293 MODULE_PARM_DESC(debug, "debug output mask");
294 #endif /* CONFIG_LIBIPW_DEBUG */
296 module_exit(ieee80211_exit);
297 module_init(ieee80211_init);
299 EXPORT_SYMBOL(alloc_ieee80211);
300 EXPORT_SYMBOL(free_ieee80211);