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);
160 goto failed_free_netdev;
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 spin_lock_init(&ieee->lock);
185 lib80211_crypt_info_init(&ieee->crypt_info, dev->name, &ieee->lock);
187 ieee->wpa_enabled = 0;
188 ieee->drop_unencrypted = 0;
189 ieee->privacy_invoked = 0;
199 void free_ieee80211(struct net_device *dev)
201 struct ieee80211_device *ieee = netdev_priv(dev);
203 lib80211_crypt_info_free(&ieee->crypt_info);
205 ieee80211_networks_free(ieee);
209 #ifdef CONFIG_IEEE80211_DEBUG
211 static int debug = 0;
212 u32 ieee80211_debug_level = 0;
213 EXPORT_SYMBOL_GPL(ieee80211_debug_level);
214 static struct proc_dir_entry *ieee80211_proc = NULL;
216 static int show_debug_level(char *page, char **start, off_t offset,
217 int count, int *eof, void *data)
219 return snprintf(page, count, "0x%08X\n", ieee80211_debug_level);
222 static int store_debug_level(struct file *file, const char __user * buffer,
223 unsigned long count, void *data)
225 char buf[] = "0x00000000\n";
226 unsigned long len = min((unsigned long)sizeof(buf) - 1, count);
229 if (copy_from_user(buf, buffer, len))
232 if (sscanf(buf, "%li", &val) != 1)
233 printk(KERN_INFO DRV_NAME
234 ": %s is not in hex or decimal form.\n", buf);
236 ieee80211_debug_level = val;
238 return strnlen(buf, len);
240 #endif /* CONFIG_IEEE80211_DEBUG */
242 static int __init ieee80211_init(void)
244 #ifdef CONFIG_IEEE80211_DEBUG
245 struct proc_dir_entry *e;
247 ieee80211_debug_level = debug;
248 ieee80211_proc = proc_mkdir(DRV_NAME, init_net.proc_net);
249 if (ieee80211_proc == NULL) {
250 IEEE80211_ERROR("Unable to create " DRV_NAME
251 " proc directory\n");
254 e = create_proc_entry("debug_level", S_IFREG | S_IRUGO | S_IWUSR,
257 remove_proc_entry(DRV_NAME, init_net.proc_net);
258 ieee80211_proc = NULL;
261 e->read_proc = show_debug_level;
262 e->write_proc = store_debug_level;
264 #endif /* CONFIG_IEEE80211_DEBUG */
266 printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
267 printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
272 static void __exit ieee80211_exit(void)
274 #ifdef CONFIG_IEEE80211_DEBUG
275 if (ieee80211_proc) {
276 remove_proc_entry("debug_level", ieee80211_proc);
277 remove_proc_entry(DRV_NAME, init_net.proc_net);
278 ieee80211_proc = NULL;
280 #endif /* CONFIG_IEEE80211_DEBUG */
283 #ifdef CONFIG_IEEE80211_DEBUG
284 #include <linux/moduleparam.h>
285 module_param(debug, int, 0444);
286 MODULE_PARM_DESC(debug, "debug output mask");
287 #endif /* CONFIG_IEEE80211_DEBUG */
289 module_exit(ieee80211_exit);
290 module_init(ieee80211_init);
292 EXPORT_SYMBOL(alloc_ieee80211);
293 EXPORT_SYMBOL(free_ieee80211);