1 /*******************************************************************************
3 Copyright(c) 2004 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 MODULE_DESCRIPTION("802.11 data/management/control stack");
58 ("Copyright (C) 2004 Intel Corporation <jketreno@linux.intel.com>");
59 MODULE_LICENSE("GPL");
61 #define DRV_NAME "ieee80211"
63 static inline int ieee80211_networks_allocate(struct ieee80211_device *ieee)
69 kmalloc(MAX_NETWORK_COUNT * sizeof(struct ieee80211_network),
71 if (!ieee->networks) {
72 printk(KERN_WARNING "%s: Out of memory allocating beacons\n",
77 memset(ieee->networks, 0,
78 MAX_NETWORK_COUNT * sizeof(struct ieee80211_network));
83 static inline void ieee80211_networks_free(struct ieee80211_device *ieee)
87 kfree(ieee->networks);
88 ieee->networks = NULL;
91 static inline void ieee80211_networks_initialize(struct ieee80211_device *ieee)
95 INIT_LIST_HEAD(&ieee->network_free_list);
96 INIT_LIST_HEAD(&ieee->network_list);
97 for (i = 0; i < MAX_NETWORK_COUNT; i++)
98 list_add_tail(&ieee->networks[i].list,
99 &ieee->network_free_list);
102 struct net_device *alloc_ieee80211(int sizeof_priv)
104 struct ieee80211_device *ieee;
105 struct net_device *dev;
108 IEEE80211_DEBUG_INFO("Initializing...\n");
110 dev = alloc_etherdev(sizeof(struct ieee80211_device) + sizeof_priv);
112 IEEE80211_ERROR("Unable to network device.\n");
115 ieee = netdev_priv(dev);
116 dev->hard_start_xmit = ieee80211_xmit;
120 err = ieee80211_networks_allocate(ieee);
122 IEEE80211_ERROR("Unable to allocate beacon storage: %d\n", err);
125 ieee80211_networks_initialize(ieee);
127 /* Default fragmentation threshold is maximum payload size */
128 ieee->fts = DEFAULT_FTS;
129 ieee->scan_age = DEFAULT_MAX_SCAN_AGE;
132 /* Default to enabling full open WEP with host based encrypt/decrypt */
133 ieee->host_encrypt = 1;
134 ieee->host_decrypt = 1;
135 ieee->ieee802_1x = 1; /* Default to supporting 802.1x */
137 INIT_LIST_HEAD(&ieee->crypt_deinit_list);
138 init_timer(&ieee->crypt_deinit_timer);
139 ieee->crypt_deinit_timer.data = (unsigned long)ieee;
140 ieee->crypt_deinit_timer.function = ieee80211_crypt_deinit_handler;
141 ieee->crypt_quiesced = 0;
143 spin_lock_init(&ieee->lock);
145 ieee->wpa_enabled = 0;
146 ieee->tkip_countermeasures = 0;
147 ieee->drop_unencrypted = 0;
148 ieee->privacy_invoked = 0;
149 ieee->ieee802_1x = 1;
159 void free_ieee80211(struct net_device *dev)
161 struct ieee80211_device *ieee = netdev_priv(dev);
165 ieee80211_crypt_quiescing(ieee);
166 del_timer_sync(&ieee->crypt_deinit_timer);
167 ieee80211_crypt_deinit_entries(ieee, 1);
169 for (i = 0; i < WEP_KEYS; i++) {
170 struct ieee80211_crypt_data *crypt = ieee->crypt[i];
173 crypt->ops->deinit(crypt->priv);
174 module_put(crypt->ops->owner);
177 ieee->crypt[i] = NULL;
181 ieee80211_networks_free(ieee);
185 #ifdef CONFIG_IEEE80211_DEBUG
187 static int debug = 0;
188 u32 ieee80211_debug_level = 0;
189 struct proc_dir_entry *ieee80211_proc = NULL;
191 static int show_debug_level(char *page, char **start, off_t offset,
192 int count, int *eof, void *data)
194 return snprintf(page, count, "0x%08X\n", ieee80211_debug_level);
197 static int store_debug_level(struct file *file, const char __user * buffer,
198 unsigned long count, void *data)
200 char buf[] = "0x00000000\n";
201 unsigned long len = min((unsigned long)sizeof(buf) - 1, count);
204 if (copy_from_user(buf, buffer, len))
207 if (sscanf(buf, "%li", &val) != 1)
208 printk(KERN_INFO DRV_NAME
209 ": %s is not in hex or decimal form.\n", buf);
211 ieee80211_debug_level = val;
213 return strnlen(buf, len);
216 static int __init ieee80211_init(void)
218 struct proc_dir_entry *e;
220 ieee80211_debug_level = debug;
221 ieee80211_proc = create_proc_entry(DRV_NAME, S_IFDIR, proc_net);
222 if (ieee80211_proc == NULL) {
223 IEEE80211_ERROR("Unable to create " DRV_NAME
224 " proc directory\n");
227 e = create_proc_entry("debug_level", S_IFREG | S_IRUGO | S_IWUSR,
230 remove_proc_entry(DRV_NAME, proc_net);
231 ieee80211_proc = NULL;
234 e->read_proc = show_debug_level;
235 e->write_proc = store_debug_level;
241 static void __exit ieee80211_exit(void)
243 if (ieee80211_proc) {
244 remove_proc_entry("debug_level", ieee80211_proc);
245 remove_proc_entry(DRV_NAME, proc_net);
246 ieee80211_proc = NULL;
250 #include <linux/moduleparam.h>
251 module_param(debug, int, 0444);
252 MODULE_PARM_DESC(debug, "debug output mask");
254 module_exit(ieee80211_exit);
255 module_init(ieee80211_init);
258 const char *escape_essid(const char *essid, u8 essid_len)
260 static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
261 const char *s = essid;
264 if (ieee80211_is_empty_essid(essid, essid_len)) {
265 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
269 essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
270 while (essid_len--) {
283 EXPORT_SYMBOL(alloc_ieee80211);
284 EXPORT_SYMBOL(free_ieee80211);
285 EXPORT_SYMBOL(escape_essid);