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 /* Host fragementation in Open mode. Default is enabled.
137 * Note: host fragmentation is always enabled if host encryption
138 * is enabled. For cards can do hardware encryption, they must do
139 * hardware fragmentation as well. So we don't need a variable
140 * like host_enc_frag. */
141 ieee->host_open_frag = 1;
142 ieee->ieee802_1x = 1; /* Default to supporting 802.1x */
144 INIT_LIST_HEAD(&ieee->crypt_deinit_list);
145 init_timer(&ieee->crypt_deinit_timer);
146 ieee->crypt_deinit_timer.data = (unsigned long)ieee;
147 ieee->crypt_deinit_timer.function = ieee80211_crypt_deinit_handler;
148 ieee->crypt_quiesced = 0;
150 spin_lock_init(&ieee->lock);
152 ieee->wpa_enabled = 0;
153 ieee->tkip_countermeasures = 0;
154 ieee->drop_unencrypted = 0;
155 ieee->privacy_invoked = 0;
165 void free_ieee80211(struct net_device *dev)
167 struct ieee80211_device *ieee = netdev_priv(dev);
171 ieee80211_crypt_quiescing(ieee);
172 del_timer_sync(&ieee->crypt_deinit_timer);
173 ieee80211_crypt_deinit_entries(ieee, 1);
175 for (i = 0; i < WEP_KEYS; i++) {
176 struct ieee80211_crypt_data *crypt = ieee->crypt[i];
179 crypt->ops->deinit(crypt->priv);
180 module_put(crypt->ops->owner);
183 ieee->crypt[i] = NULL;
187 ieee80211_networks_free(ieee);
191 #ifdef CONFIG_IEEE80211_DEBUG
193 static int debug = 0;
194 u32 ieee80211_debug_level = 0;
195 struct proc_dir_entry *ieee80211_proc = NULL;
197 static int show_debug_level(char *page, char **start, off_t offset,
198 int count, int *eof, void *data)
200 return snprintf(page, count, "0x%08X\n", ieee80211_debug_level);
203 static int store_debug_level(struct file *file, const char __user * buffer,
204 unsigned long count, void *data)
206 char buf[] = "0x00000000\n";
207 unsigned long len = min((unsigned long)sizeof(buf) - 1, count);
210 if (copy_from_user(buf, buffer, len))
213 if (sscanf(buf, "%li", &val) != 1)
214 printk(KERN_INFO DRV_NAME
215 ": %s is not in hex or decimal form.\n", buf);
217 ieee80211_debug_level = val;
219 return strnlen(buf, len);
222 static int __init ieee80211_init(void)
224 struct proc_dir_entry *e;
226 ieee80211_debug_level = debug;
227 ieee80211_proc = create_proc_entry(DRV_NAME, S_IFDIR, proc_net);
228 if (ieee80211_proc == NULL) {
229 IEEE80211_ERROR("Unable to create " DRV_NAME
230 " proc directory\n");
233 e = create_proc_entry("debug_level", S_IFREG | S_IRUGO | S_IWUSR,
236 remove_proc_entry(DRV_NAME, proc_net);
237 ieee80211_proc = NULL;
240 e->read_proc = show_debug_level;
241 e->write_proc = store_debug_level;
247 static void __exit ieee80211_exit(void)
249 if (ieee80211_proc) {
250 remove_proc_entry("debug_level", ieee80211_proc);
251 remove_proc_entry(DRV_NAME, proc_net);
252 ieee80211_proc = NULL;
256 #include <linux/moduleparam.h>
257 module_param(debug, int, 0444);
258 MODULE_PARM_DESC(debug, "debug output mask");
260 module_exit(ieee80211_exit);
261 module_init(ieee80211_init);
264 const char *escape_essid(const char *essid, u8 essid_len)
266 static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
267 const char *s = essid;
270 if (ieee80211_is_empty_essid(essid, essid_len)) {
271 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
275 essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
276 while (essid_len--) {
289 EXPORT_SYMBOL(alloc_ieee80211);
290 EXPORT_SYMBOL(free_ieee80211);
291 EXPORT_SYMBOL(escape_essid);