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 <jkmaline@cc.hut.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/config.h>
35 #include <linux/errno.h>
36 #include <linux/if_arp.h>
37 #include <linux/in6.h>
40 #include <linux/kernel.h>
41 #include <linux/module.h>
42 #include <linux/netdevice.h>
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>
54 #include <net/ieee80211.h>
56 #define DRV_DESCRIPTION "802.11 data/management/control stack"
57 #define DRV_NAME "ieee80211"
58 #define DRV_VERSION IEEE80211_VERSION
59 #define DRV_COPYRIGHT "Copyright (C) 2004-2005 Intel Corporation <jketreno@linux.intel.com>"
61 MODULE_VERSION(DRV_VERSION);
62 MODULE_DESCRIPTION(DRV_DESCRIPTION);
63 MODULE_AUTHOR(DRV_COPYRIGHT);
64 MODULE_LICENSE("GPL");
66 static inline int ieee80211_networks_allocate(struct ieee80211_device *ieee)
72 kmalloc(MAX_NETWORK_COUNT * sizeof(struct ieee80211_network),
74 if (!ieee->networks) {
75 printk(KERN_WARNING "%s: Out of memory allocating beacons\n",
80 memset(ieee->networks, 0,
81 MAX_NETWORK_COUNT * sizeof(struct ieee80211_network));
86 static inline void ieee80211_networks_free(struct ieee80211_device *ieee)
90 kfree(ieee->networks);
91 ieee->networks = NULL;
94 static inline void ieee80211_networks_initialize(struct ieee80211_device *ieee)
98 INIT_LIST_HEAD(&ieee->network_free_list);
99 INIT_LIST_HEAD(&ieee->network_list);
100 for (i = 0; i < MAX_NETWORK_COUNT; i++)
101 list_add_tail(&ieee->networks[i].list,
102 &ieee->network_free_list);
105 struct net_device *alloc_ieee80211(int sizeof_priv)
107 struct ieee80211_device *ieee;
108 struct net_device *dev;
111 IEEE80211_DEBUG_INFO("Initializing...\n");
113 dev = alloc_etherdev(sizeof(struct ieee80211_device) + sizeof_priv);
115 IEEE80211_ERROR("Unable to network device.\n");
118 ieee = netdev_priv(dev);
119 dev->hard_start_xmit = ieee80211_xmit;
123 err = ieee80211_networks_allocate(ieee);
125 IEEE80211_ERROR("Unable to allocate beacon storage: %d\n", err);
128 ieee80211_networks_initialize(ieee);
130 /* Default fragmentation threshold is maximum payload size */
131 ieee->fts = DEFAULT_FTS;
132 ieee->rts = DEFAULT_FTS;
133 ieee->scan_age = DEFAULT_MAX_SCAN_AGE;
136 /* Default to enabling full open WEP with host based encrypt/decrypt */
137 ieee->host_encrypt = 1;
138 ieee->host_decrypt = 1;
139 ieee->host_mc_decrypt = 1;
141 /* Host fragementation in Open mode. Default is enabled.
142 * Note: host fragmentation is always enabled if host encryption
143 * is enabled. For cards can do hardware encryption, they must do
144 * hardware fragmentation as well. So we don't need a variable
145 * like host_enc_frag. */
146 ieee->host_open_frag = 1;
147 ieee->ieee802_1x = 1; /* Default to supporting 802.1x */
149 INIT_LIST_HEAD(&ieee->crypt_deinit_list);
150 init_timer(&ieee->crypt_deinit_timer);
151 ieee->crypt_deinit_timer.data = (unsigned long)ieee;
152 ieee->crypt_deinit_timer.function = ieee80211_crypt_deinit_handler;
153 ieee->crypt_quiesced = 0;
155 spin_lock_init(&ieee->lock);
157 ieee->wpa_enabled = 0;
158 ieee->drop_unencrypted = 0;
159 ieee->privacy_invoked = 0;
169 void free_ieee80211(struct net_device *dev)
171 struct ieee80211_device *ieee = netdev_priv(dev);
175 ieee80211_crypt_quiescing(ieee);
176 del_timer_sync(&ieee->crypt_deinit_timer);
177 ieee80211_crypt_deinit_entries(ieee, 1);
179 for (i = 0; i < WEP_KEYS; i++) {
180 struct ieee80211_crypt_data *crypt = ieee->crypt[i];
183 crypt->ops->deinit(crypt->priv);
184 module_put(crypt->ops->owner);
187 ieee->crypt[i] = NULL;
191 ieee80211_networks_free(ieee);
195 #ifdef CONFIG_IEEE80211_DEBUG
197 static int debug = 0;
198 u32 ieee80211_debug_level = 0;
199 struct proc_dir_entry *ieee80211_proc = NULL;
201 static int show_debug_level(char *page, char **start, off_t offset,
202 int count, int *eof, void *data)
204 return snprintf(page, count, "0x%08X\n", ieee80211_debug_level);
207 static int store_debug_level(struct file *file, const char __user * buffer,
208 unsigned long count, void *data)
210 char buf[] = "0x00000000\n";
211 unsigned long len = min((unsigned long)sizeof(buf) - 1, count);
214 if (copy_from_user(buf, buffer, len))
217 if (sscanf(buf, "%li", &val) != 1)
218 printk(KERN_INFO DRV_NAME
219 ": %s is not in hex or decimal form.\n", buf);
221 ieee80211_debug_level = val;
223 return strnlen(buf, len);
225 #endif /* CONFIG_IEEE80211_DEBUG */
227 static int __init ieee80211_init(void)
229 #ifdef CONFIG_IEEE80211_DEBUG
230 struct proc_dir_entry *e;
232 ieee80211_debug_level = debug;
233 ieee80211_proc = proc_mkdir(DRV_NAME, proc_net);
234 if (ieee80211_proc == NULL) {
235 IEEE80211_ERROR("Unable to create " DRV_NAME
236 " proc directory\n");
239 e = create_proc_entry("debug_level", S_IFREG | S_IRUGO | S_IWUSR,
242 remove_proc_entry(DRV_NAME, proc_net);
243 ieee80211_proc = NULL;
246 e->read_proc = show_debug_level;
247 e->write_proc = store_debug_level;
249 #endif /* CONFIG_IEEE80211_DEBUG */
251 printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
252 printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
257 static void __exit ieee80211_exit(void)
259 #ifdef CONFIG_IEEE80211_DEBUG
260 if (ieee80211_proc) {
261 remove_proc_entry("debug_level", ieee80211_proc);
262 remove_proc_entry(DRV_NAME, proc_net);
263 ieee80211_proc = NULL;
265 #endif /* CONFIG_IEEE80211_DEBUG */
268 #ifdef CONFIG_IEEE80211_DEBUG
269 #include <linux/moduleparam.h>
270 module_param(debug, int, 0444);
271 MODULE_PARM_DESC(debug, "debug output mask");
272 #endif /* CONFIG_IEEE80211_DEBUG */
274 module_exit(ieee80211_exit);
275 module_init(ieee80211_init);
277 const char *escape_essid(const char *essid, u8 essid_len)
279 static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
280 const char *s = essid;
283 if (ieee80211_is_empty_essid(essid, essid_len)) {
284 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
288 essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
289 while (essid_len--) {
302 EXPORT_SYMBOL(alloc_ieee80211);
303 EXPORT_SYMBOL(free_ieee80211);
304 EXPORT_SYMBOL(escape_essid);