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->rts = DEFAULT_FTS;
130 ieee->scan_age = DEFAULT_MAX_SCAN_AGE;
133 /* Default to enabling full open WEP with host based encrypt/decrypt */
134 ieee->host_encrypt = 1;
135 ieee->host_decrypt = 1;
136 ieee->ieee802_1x = 1; /* Default to supporting 802.1x */
138 INIT_LIST_HEAD(&ieee->crypt_deinit_list);
139 init_timer(&ieee->crypt_deinit_timer);
140 ieee->crypt_deinit_timer.data = (unsigned long)ieee;
141 ieee->crypt_deinit_timer.function = ieee80211_crypt_deinit_handler;
142 ieee->crypt_quiesced = 0;
144 spin_lock_init(&ieee->lock);
146 ieee->wpa_enabled = 0;
147 ieee->tkip_countermeasures = 0;
148 ieee->drop_unencrypted = 0;
149 ieee->privacy_invoked = 0;
150 ieee->ieee802_1x = 1;
160 void free_ieee80211(struct net_device *dev)
162 struct ieee80211_device *ieee = netdev_priv(dev);
166 ieee80211_crypt_quiescing(ieee);
167 del_timer_sync(&ieee->crypt_deinit_timer);
168 ieee80211_crypt_deinit_entries(ieee, 1);
170 for (i = 0; i < WEP_KEYS; i++) {
171 struct ieee80211_crypt_data *crypt = ieee->crypt[i];
174 crypt->ops->deinit(crypt->priv);
175 module_put(crypt->ops->owner);
178 ieee->crypt[i] = NULL;
182 ieee80211_networks_free(ieee);
186 #ifdef CONFIG_IEEE80211_DEBUG
188 static int debug = 0;
189 u32 ieee80211_debug_level = 0;
190 struct proc_dir_entry *ieee80211_proc = NULL;
192 static int show_debug_level(char *page, char **start, off_t offset,
193 int count, int *eof, void *data)
195 return snprintf(page, count, "0x%08X\n", ieee80211_debug_level);
198 static int store_debug_level(struct file *file, const char __user * buffer,
199 unsigned long count, void *data)
201 char buf[] = "0x00000000\n";
202 unsigned long len = min((unsigned long)sizeof(buf) - 1, count);
205 if (copy_from_user(buf, buffer, len))
208 if (sscanf(buf, "%li", &val) != 1)
209 printk(KERN_INFO DRV_NAME
210 ": %s is not in hex or decimal form.\n", buf);
212 ieee80211_debug_level = val;
214 return strnlen(buf, len);
217 static int __init ieee80211_init(void)
219 struct proc_dir_entry *e;
221 ieee80211_debug_level = debug;
222 ieee80211_proc = create_proc_entry(DRV_NAME, S_IFDIR, proc_net);
223 if (ieee80211_proc == NULL) {
224 IEEE80211_ERROR("Unable to create " DRV_NAME
225 " proc directory\n");
228 e = create_proc_entry("debug_level", S_IFREG | S_IRUGO | S_IWUSR,
231 remove_proc_entry(DRV_NAME, proc_net);
232 ieee80211_proc = NULL;
235 e->read_proc = show_debug_level;
236 e->write_proc = store_debug_level;
242 static void __exit ieee80211_exit(void)
244 if (ieee80211_proc) {
245 remove_proc_entry("debug_level", ieee80211_proc);
246 remove_proc_entry(DRV_NAME, proc_net);
247 ieee80211_proc = NULL;
251 #include <linux/moduleparam.h>
252 module_param(debug, int, 0444);
253 MODULE_PARM_DESC(debug, "debug output mask");
255 module_exit(ieee80211_exit);
256 module_init(ieee80211_init);
259 const char *escape_essid(const char *essid, u8 essid_len)
261 static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
262 const char *s = essid;
265 if (ieee80211_is_empty_essid(essid, essid_len)) {
266 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
270 essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
271 while (essid_len--) {
284 EXPORT_SYMBOL(alloc_ieee80211);
285 EXPORT_SYMBOL(free_ieee80211);
286 EXPORT_SYMBOL(escape_essid);