summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/ipw2x00/libipw_module.c
blob: 20b8a8a2064409e9e1968b71c1d15c2ae033b2a7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
/*******************************************************************************

  Copyright(c) 2004-2005 Intel Corporation. All rights reserved.

  Portions of this file are based on the WEP enablement code provided by the
  Host AP project hostap-drivers v0.1.3
  Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
  <j@w1.fi>
  Copyright (c) 2002-2003, Jouni Malinen <j@w1.fi>

  This program is free software; you can redistribute it and/or modify it
  under the terms of version 2 of the GNU General Public License as
  published by the Free Software Foundation.

  This program is distributed in the hope that it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  more details.

  You should have received a copy of the GNU General Public License along with
  this program; if not, write to the Free Software Foundation, Inc., 59
  Temple Place - Suite 330, Boston, MA  02111-1307, USA.

  The full GNU General Public License is included in this distribution in the
  file called LICENSE.

  Contact Information:
  Intel Linux Wireless <ilw@linux.intel.com>
  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497

*******************************************************************************/

#include <linux/compiler.h>
#include <linux/errno.h>
#include <linux/if_arp.h>
#include <linux/in6.h>
#include <linux/in.h>
#include <linux/ip.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/proc_fs.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
#include <linux/tcp.h>
#include <linux/types.h>
#include <linux/wireless.h>
#include <linux/etherdevice.h>
#include <asm/uaccess.h>
#include <net/net_namespace.h>
#include <net/arp.h>

#include "libipw.h"

#define DRV_DESCRIPTION "802.11 data/management/control stack"
#define DRV_NAME        "ieee80211"
#define DRV_VERSION	LIBIPW_VERSION
#define DRV_COPYRIGHT   "Copyright (C) 2004-2005 Intel Corporation <jketreno@linux.intel.com>"

MODULE_VERSION(DRV_VERSION);
MODULE_DESCRIPTION(DRV_DESCRIPTION);
MODULE_AUTHOR(DRV_COPYRIGHT);
MODULE_LICENSE("GPL");

struct cfg80211_ops libipw_config_ops = { };
void *libipw_wiphy_privid = &libipw_wiphy_privid;

static int libipw_networks_allocate(struct libipw_device *ieee)
{
	if (ieee->networks)
		return 0;

	ieee->networks =
	    kzalloc(MAX_NETWORK_COUNT * sizeof(struct libipw_network),
		    GFP_KERNEL);
	if (!ieee->networks) {
		printk(KERN_WARNING "%s: Out of memory allocating beacons\n",
		       ieee->dev->name);
		return -ENOMEM;
	}

	return 0;
}

void libipw_network_reset(struct libipw_network *network)
{
	if (!network)
		return;

	if (network->ibss_dfs) {
		kfree(network->ibss_dfs);
		network->ibss_dfs = NULL;
	}
}

static inline void libipw_networks_free(struct libipw_device *ieee)
{
	int i;

	if (!ieee->networks)
		return;

	for (i = 0; i < MAX_NETWORK_COUNT; i++)
		if (ieee->networks[i].ibss_dfs)
			kfree(ieee->networks[i].ibss_dfs);

	kfree(ieee->networks);
	ieee->networks = NULL;
}

void libipw_networks_age(struct libipw_device *ieee,
                            unsigned long age_secs)
{
	struct libipw_network *network = NULL;
	unsigned long flags;
	unsigned long age_jiffies = msecs_to_jiffies(age_secs * MSEC_PER_SEC);

	spin_lock_irqsave(&ieee->lock, flags);
	list_for_each_entry(network, &ieee->network_list, list) {
		network->last_scanned -= age_jiffies;
	}
	spin_unlock_irqrestore(&ieee->lock, flags);
}
EXPORT_SYMBOL(libipw_networks_age);

static void libipw_networks_initialize(struct libipw_device *ieee)
{
	int i;

	INIT_LIST_HEAD(&ieee->network_free_list);
	INIT_LIST_HEAD(&ieee->network_list);
	for (i = 0; i < MAX_NETWORK_COUNT; i++)
		list_add_tail(&ieee->networks[i].list,
			      &ieee->network_free_list);
}

int libipw_change_mtu(struct net_device *dev, int new_mtu)
{
	if ((new_mtu < 68) || (new_mtu > LIBIPW_DATA_LEN))
		return -EINVAL;
	dev->mtu = new_mtu;
	return 0;
}
EXPORT_SYMBOL(libipw_change_mtu);

struct net_device *alloc_ieee80211(int sizeof_priv, int monitor)
{
	struct libipw_device *ieee;
	struct net_device *dev;
	int err;

	LIBIPW_DEBUG_INFO("Initializing...\n");

	dev = alloc_etherdev(sizeof(struct libipw_device) + sizeof_priv);
	if (!dev) {
		LIBIPW_ERROR("Unable to allocate network device.\n");
		goto failed;
	}
	ieee = netdev_priv(dev);

	ieee->dev = dev;

	if (!monitor) {
		ieee->wdev.wiphy = wiphy_new(&libipw_config_ops, 0);
		if (!ieee->wdev.wiphy) {
			LIBIPW_ERROR("Unable to allocate wiphy.\n");
			goto failed_free_netdev;
		}

		ieee->dev->ieee80211_ptr = &ieee->wdev;
		ieee->wdev.iftype = NL80211_IFTYPE_STATION;

		/* Fill-out wiphy structure bits we know...  Not enough info
		   here to call set_wiphy_dev or set MAC address or channel info
		   -- have to do that in ->ndo_init... */
		ieee->wdev.wiphy->privid = libipw_wiphy_privid;

		ieee->wdev.wiphy->max_scan_ssids = 1;
		ieee->wdev.wiphy->max_scan_ie_len = 0;
		ieee->wdev.wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION)
						| BIT(NL80211_IFTYPE_ADHOC);
	}

	err = libipw_networks_allocate(ieee);
	if (err) {
		LIBIPW_ERROR("Unable to allocate beacon storage: %d\n", err);
		goto failed_free_wiphy;
	}
	libipw_networks_initialize(ieee);

	/* Default fragmentation threshold is maximum payload size */
	ieee->fts = DEFAULT_FTS;
	ieee->rts = DEFAULT_FTS;
	ieee->scan_age = DEFAULT_MAX_SCAN_AGE;
	ieee->open_wep = 1;

	/* Default to enabling full open WEP with host based encrypt/decrypt */
	ieee->host_encrypt = 1;
	ieee->host_decrypt = 1;
	ieee->host_mc_decrypt = 1;

	/* Host fragmentation in Open mode. Default is enabled.
	 * Note: host fragmentation is always enabled if host encryption
	 * is enabled. For cards can do hardware encryption, they must do
	 * hardware fragmentation as well. So we don't need a variable
	 * like host_enc_frag. */
	ieee->host_open_frag = 1;
	ieee->ieee802_1x = 1;	/* Default to supporting 802.1x */

	spin_lock_init(&ieee->lock);

	lib80211_crypt_info_init(&ieee->crypt_info, dev->name, &ieee->lock);

	ieee->wpa_enabled = 0;
	ieee->drop_unencrypted = 0;
	ieee->privacy_invoked = 0;

	return dev;

failed_free_wiphy:
	if (!monitor)
		wiphy_free(ieee->wdev.wiphy);
failed_free_netdev:
	free_netdev(dev);
failed:
	return NULL;
}

void free_ieee80211(struct net_device *dev, int monitor)
{
	struct libipw_device *ieee = netdev_priv(dev);

	lib80211_crypt_info_free(&ieee->crypt_info);

	libipw_networks_free(ieee);

	/* free cfg80211 resources */
	if (!monitor)
		wiphy_free(ieee->wdev.wiphy);

	free_netdev(dev);
}

void unregister_ieee80211(struct libipw_device *ieee)
{
	wiphy_unregister(ieee->wdev.wiphy);
	kfree(ieee->a_band.channels);
	kfree(ieee->bg_band.channels);
}

#ifdef CONFIG_LIBIPW_DEBUG

static int debug = 0;
u32 libipw_debug_level = 0;
EXPORT_SYMBOL_GPL(libipw_debug_level);
static struct proc_dir_entry *libipw_proc = NULL;

static int show_debug_level(char *page, char **start, off_t offset,
			    int count, int *eof, void *data)
{
	return snprintf(page, count, "0x%08X\n", libipw_debug_level);
}

static int store_debug_level(struct file *file, const char __user * buffer,
			     unsigned long count, void *data)
{
	char buf[] = "0x00000000\n";
	unsigned long len = min((unsigned long)sizeof(buf) - 1, count);
	unsigned long val;

	if (copy_from_user(buf, buffer, len))
		return count;
	buf[len] = 0;
	if (sscanf(buf, "%li", &val) != 1)
		printk(KERN_INFO DRV_NAME
		       ": %s is not in hex or decimal form.\n", buf);
	else
		libipw_debug_level = val;

	return strnlen(buf, len);
}
#endif				/* CONFIG_LIBIPW_DEBUG */

static int __init libipw_init(void)
{
#ifdef CONFIG_LIBIPW_DEBUG
	struct proc_dir_entry *e;

	libipw_debug_level = debug;
	libipw_proc = proc_mkdir(DRV_NAME, init_net.proc_net);
	if (libipw_proc == NULL) {
		LIBIPW_ERROR("Unable to create " DRV_NAME
				" proc directory\n");
		return -EIO;
	}
	e = create_proc_entry("debug_level", S_IFREG | S_IRUGO | S_IWUSR,
			      libipw_proc);
	if (!e) {
		remove_proc_entry(DRV_NAME, init_net.proc_net);
		libipw_proc = NULL;
		return -EIO;
	}
	e->read_proc = show_debug_level;
	e->write_proc = store_debug_level;
	e->data = NULL;
#endif				/* CONFIG_LIBIPW_DEBUG */

	printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
	printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");

	return 0;
}

static void __exit libipw_exit(void)
{
#ifdef CONFIG_LIBIPW_DEBUG
	if (libipw_proc) {
		remove_proc_entry("debug_level", libipw_proc);
		remove_proc_entry(DRV_NAME, init_net.proc_net);
		libipw_proc = NULL;
	}
#endif				/* CONFIG_LIBIPW_DEBUG */
}

#ifdef CONFIG_LIBIPW_DEBUG
#include <linux/moduleparam.h>
module_param(debug, int, 0444);
MODULE_PARM_DESC(debug, "debug output mask");
#endif				/* CONFIG_LIBIPW_DEBUG */

module_exit(libipw_exit);
module_init(libipw_init);

EXPORT_SYMBOL(alloc_ieee80211);
EXPORT_SYMBOL(free_ieee80211);
EXPORT_SYMBOL(unregister_ieee80211);
OpenPOWER on IntegriCloud