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1/*******************************************************************************
2
3 Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
4
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
8 <j@w1.fi>
9 Copyright (c) 2002-2003, Jouni Malinen <j@w1.fi>
10
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.
14
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
18 more details.
19
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.
23
24 The full GNU General Public License is included in this distribution in the
25 file called LICENSE.
26
27 Contact Information:
28 Intel Linux Wireless <ilw@linux.intel.com>
29 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
30
31*******************************************************************************/
32
33#include <linux/compiler.h>
34#include <linux/errno.h>
35#include <linux/if_arp.h>
36#include <linux/in6.h>
37#include <linux/in.h>
38#include <linux/ip.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 <linux/uaccess.h>
50#include <net/net_namespace.h>
51#include <net/arp.h>
52
53#include "libipw.h"
54
55#define DRV_DESCRIPTION "802.11 data/management/control stack"
56#define DRV_NAME "libipw"
57#define DRV_PROCNAME "ieee80211"
58#define DRV_VERSION LIBIPW_VERSION
59#define DRV_COPYRIGHT "Copyright (C) 2004-2005 Intel Corporation <jketreno@linux.intel.com>"
60
61MODULE_VERSION(DRV_VERSION);
62MODULE_DESCRIPTION(DRV_DESCRIPTION);
63MODULE_AUTHOR(DRV_COPYRIGHT);
64MODULE_LICENSE("GPL");
65
66static struct cfg80211_ops libipw_config_ops = { };
67static void *libipw_wiphy_privid = &libipw_wiphy_privid;
68
69static int libipw_networks_allocate(struct libipw_device *ieee)
70{
71 int i, j;
72
73 for (i = 0; i < MAX_NETWORK_COUNT; i++) {
74 ieee->networks[i] = kzalloc(sizeof(struct libipw_network),
75 GFP_KERNEL);
76 if (!ieee->networks[i]) {
77 LIBIPW_ERROR("Out of memory allocating beacons\n");
78 for (j = 0; j < i; j++)
79 kfree(ieee->networks[j]);
80 return -ENOMEM;
81 }
82 }
83
84 return 0;
85}
86
87static inline void libipw_networks_free(struct libipw_device *ieee)
88{
89 int i;
90
91 for (i = 0; i < MAX_NETWORK_COUNT; i++)
92 kfree(ieee->networks[i]);
93}
94
95void libipw_networks_age(struct libipw_device *ieee,
96 unsigned long age_secs)
97{
98 struct libipw_network *network = NULL;
99 unsigned long flags;
100 unsigned long age_jiffies = msecs_to_jiffies(age_secs * MSEC_PER_SEC);
101
102 spin_lock_irqsave(&ieee->lock, flags);
103 list_for_each_entry(network, &ieee->network_list, list) {
104 network->last_scanned -= age_jiffies;
105 }
106 spin_unlock_irqrestore(&ieee->lock, flags);
107}
108EXPORT_SYMBOL(libipw_networks_age);
109
110static void libipw_networks_initialize(struct libipw_device *ieee)
111{
112 int i;
113
114 INIT_LIST_HEAD(&ieee->network_free_list);
115 INIT_LIST_HEAD(&ieee->network_list);
116 for (i = 0; i < MAX_NETWORK_COUNT; i++)
117 list_add_tail(&ieee->networks[i]->list,
118 &ieee->network_free_list);
119}
120
121struct net_device *alloc_libipw(int sizeof_priv, int monitor)
122{
123 struct libipw_device *ieee;
124 struct net_device *dev;
125 int err;
126
127 LIBIPW_DEBUG_INFO("Initializing...\n");
128
129 dev = alloc_etherdev(sizeof(struct libipw_device) + sizeof_priv);
130 if (!dev)
131 goto failed;
132
133 ieee = netdev_priv(dev);
134
135 ieee->dev = dev;
136
137 if (!monitor) {
138 ieee->wdev.wiphy = wiphy_new(&libipw_config_ops, 0);
139 if (!ieee->wdev.wiphy) {
140 LIBIPW_ERROR("Unable to allocate wiphy.\n");
141 goto failed_free_netdev;
142 }
143
144 ieee->dev->ieee80211_ptr = &ieee->wdev;
145 ieee->wdev.iftype = NL80211_IFTYPE_STATION;
146
147 /* Fill-out wiphy structure bits we know... Not enough info
148 here to call set_wiphy_dev or set MAC address or channel info
149 -- have to do that in ->ndo_init... */
150 ieee->wdev.wiphy->privid = libipw_wiphy_privid;
151
152 ieee->wdev.wiphy->max_scan_ssids = 1;
153 ieee->wdev.wiphy->max_scan_ie_len = 0;
154 ieee->wdev.wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION)
155 | BIT(NL80211_IFTYPE_ADHOC);
156 }
157
158 err = libipw_networks_allocate(ieee);
159 if (err) {
160 LIBIPW_ERROR("Unable to allocate beacon storage: %d\n", err);
161 goto failed_free_wiphy;
162 }
163 libipw_networks_initialize(ieee);
164
165 /* Default fragmentation threshold is maximum payload size */
166 ieee->fts = DEFAULT_FTS;
167 ieee->rts = DEFAULT_FTS;
168 ieee->scan_age = DEFAULT_MAX_SCAN_AGE;
169 ieee->open_wep = 1;
170
171 /* Default to enabling full open WEP with host based encrypt/decrypt */
172 ieee->host_encrypt = 1;
173 ieee->host_decrypt = 1;
174 ieee->host_mc_decrypt = 1;
175
176 /* Host fragmentation in Open mode. Default is enabled.
177 * Note: host fragmentation is always enabled if host encryption
178 * is enabled. For cards can do hardware encryption, they must do
179 * hardware fragmentation as well. So we don't need a variable
180 * like host_enc_frag. */
181 ieee->host_open_frag = 1;
182 ieee->ieee802_1x = 1; /* Default to supporting 802.1x */
183
184 spin_lock_init(&ieee->lock);
185
186 lib80211_crypt_info_init(&ieee->crypt_info, dev->name, &ieee->lock);
187
188 ieee->wpa_enabled = 0;
189 ieee->drop_unencrypted = 0;
190 ieee->privacy_invoked = 0;
191
192 return dev;
193
194failed_free_wiphy:
195 if (!monitor)
196 wiphy_free(ieee->wdev.wiphy);
197failed_free_netdev:
198 free_netdev(dev);
199failed:
200 return NULL;
201}
202EXPORT_SYMBOL(alloc_libipw);
203
204void free_libipw(struct net_device *dev, int monitor)
205{
206 struct libipw_device *ieee = netdev_priv(dev);
207
208 lib80211_crypt_info_free(&ieee->crypt_info);
209
210 libipw_networks_free(ieee);
211
212 /* free cfg80211 resources */
213 if (!monitor)
214 wiphy_free(ieee->wdev.wiphy);
215
216 free_netdev(dev);
217}
218EXPORT_SYMBOL(free_libipw);
219
220#ifdef CONFIG_LIBIPW_DEBUG
221
222static int debug = 0;
223u32 libipw_debug_level = 0;
224EXPORT_SYMBOL_GPL(libipw_debug_level);
225static struct proc_dir_entry *libipw_proc = NULL;
226
227static int debug_level_proc_show(struct seq_file *m, void *v)
228{
229 seq_printf(m, "0x%08X\n", libipw_debug_level);
230 return 0;
231}
232
233static int debug_level_proc_open(struct inode *inode, struct file *file)
234{
235 return single_open(file, debug_level_proc_show, NULL);
236}
237
238static ssize_t debug_level_proc_write(struct file *file,
239 const char __user *buffer, size_t count, loff_t *pos)
240{
241 char buf[] = "0x00000000\n";
242 size_t len = min(sizeof(buf) - 1, count);
243 unsigned long val;
244
245 if (copy_from_user(buf, buffer, len))
246 return count;
247 buf[len] = 0;
248 if (sscanf(buf, "%li", &val) != 1)
249 printk(KERN_INFO DRV_NAME
250 ": %s is not in hex or decimal form.\n", buf);
251 else
252 libipw_debug_level = val;
253
254 return strnlen(buf, len);
255}
256
257static const struct file_operations debug_level_proc_fops = {
258 .owner = THIS_MODULE,
259 .open = debug_level_proc_open,
260 .read = seq_read,
261 .llseek = seq_lseek,
262 .release = single_release,
263 .write = debug_level_proc_write,
264};
265#endif /* CONFIG_LIBIPW_DEBUG */
266
267static int __init libipw_init(void)
268{
269#ifdef CONFIG_LIBIPW_DEBUG
270 struct proc_dir_entry *e;
271
272 libipw_debug_level = debug;
273 libipw_proc = proc_mkdir(DRV_PROCNAME, init_net.proc_net);
274 if (libipw_proc == NULL) {
275 LIBIPW_ERROR("Unable to create " DRV_PROCNAME
276 " proc directory\n");
277 return -EIO;
278 }
279 e = proc_create("debug_level", 0644, libipw_proc,
280 &debug_level_proc_fops);
281 if (!e) {
282 remove_proc_entry(DRV_PROCNAME, init_net.proc_net);
283 libipw_proc = NULL;
284 return -EIO;
285 }
286#endif /* CONFIG_LIBIPW_DEBUG */
287
288 printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
289 printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
290
291 return 0;
292}
293
294static void __exit libipw_exit(void)
295{
296#ifdef CONFIG_LIBIPW_DEBUG
297 if (libipw_proc) {
298 remove_proc_entry("debug_level", libipw_proc);
299 remove_proc_entry(DRV_PROCNAME, init_net.proc_net);
300 libipw_proc = NULL;
301 }
302#endif /* CONFIG_LIBIPW_DEBUG */
303}
304
305#ifdef CONFIG_LIBIPW_DEBUG
306#include <linux/moduleparam.h>
307module_param(debug, int, 0444);
308MODULE_PARM_DESC(debug, "debug output mask");
309#endif /* CONFIG_LIBIPW_DEBUG */
310
311module_exit(libipw_exit);
312module_init(libipw_init);