aboutsummaryrefslogtreecommitdiff
path: root/net/ieee80211/softmac/ieee80211softmac_wx.c
blob: fa2f7da606a95488f5893b5cf4538c6083b770b9 (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
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
/*
 * This file contains our _wx handlers. Make sure you EXPORT_SYMBOL_GPL them
 *
 * Copyright (c) 2005, 2006 Johannes Berg <johannes@sipsolutions.net>
 *                          Joseph Jezak <josejx@gentoo.org>
 *                          Larry Finger <Larry.Finger@lwfinger.net>
 *                          Danny van Dyk <kugelfang@gentoo.org>
 *                          Michael Buesch <mbuesch@freenet.de>
 *
 * 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 *
 * The full GNU General Public License is included in this distribution in the
 * file called COPYING.
 */

#include "ieee80211softmac_priv.h"

#include <net/iw_handler.h>
/* for is_broadcast_ether_addr and is_zero_ether_addr */
#include <linux/etherdevice.h>

int
ieee80211softmac_wx_trigger_scan(struct net_device *net_dev,
				 struct iw_request_info *info,
				 union iwreq_data *data,
				 char *extra)
{
	struct ieee80211softmac_device *sm = ieee80211_priv(net_dev);
	return ieee80211softmac_start_scan(sm);
}
EXPORT_SYMBOL_GPL(ieee80211softmac_wx_trigger_scan);


/* if we're still scanning, return -EAGAIN so that userspace tools
 * can get the complete scan results, otherwise return 0. */
int
ieee80211softmac_wx_get_scan_results(struct net_device *net_dev,
				     struct iw_request_info *info,
				     union iwreq_data *data,
				     char *extra)
{
	unsigned long flags;
	struct ieee80211softmac_device *sm = ieee80211_priv(net_dev);

	spin_lock_irqsave(&sm->lock, flags);
	if (sm->scanning) {
		spin_unlock_irqrestore(&sm->lock, flags);
		return -EAGAIN;
	}
	spin_unlock_irqrestore(&sm->lock, flags);
	return ieee80211_wx_get_scan(sm->ieee, info, data, extra);
}
EXPORT_SYMBOL_GPL(ieee80211softmac_wx_get_scan_results);

int
ieee80211softmac_wx_set_essid(struct net_device *net_dev,
			      struct iw_request_info *info,
			      union iwreq_data *data,
			      char *extra)
{
	struct ieee80211softmac_device *sm = ieee80211_priv(net_dev);
	struct ieee80211softmac_network *n;
	struct ieee80211softmac_auth_queue_item *authptr;
	int length = 0;

	mutex_lock(&sm->associnfo.mutex);

	/* Check if we're already associating to this or another network
	 * If it's another network, cancel and start over with our new network
	 * If it's our network, ignore the change, we're already doing it!
	 */
	if((sm->associnfo.associating || sm->associnfo.associated) &&
	   (data->essid.flags && data->essid.length)) {
		/* Get the associating network */
		n = ieee80211softmac_get_network_by_bssid(sm, sm->associnfo.bssid);
		if(n && n->essid.len == data->essid.length &&
		   !memcmp(n->essid.data, extra, n->essid.len)) {
			dprintk(KERN_INFO PFX "Already associating or associated to "MAC_FMT"\n",
				MAC_ARG(sm->associnfo.bssid));
			goto out;
		} else {
			dprintk(KERN_INFO PFX "Canceling existing associate request!\n");
			/* Cancel assoc work */
			cancel_delayed_work(&sm->associnfo.work);
			/* We don't have to do this, but it's a little cleaner */
			list_for_each_entry(authptr, &sm->auth_queue, list)
				cancel_delayed_work(&authptr->work);
			sm->associnfo.bssvalid = 0;
			sm->associnfo.bssfixed = 0;
			flush_scheduled_work();
			sm->associnfo.associating = 0;
			sm->associnfo.associated = 0;
		}
	}


	sm->associnfo.static_essid = 0;
	sm->associnfo.assoc_wait = 0;

	if (data->essid.flags && data->essid.length) {
		length = min((int)data->essid.length, IW_ESSID_MAX_SIZE);
		if (length) {
			memcpy(sm->associnfo.req_essid.data, extra, length);
			sm->associnfo.static_essid = 1;
		}
	}

	/* set our requested ESSID length.
	 * If applicable, we have already copied the data in */
	sm->associnfo.req_essid.len = length;

	sm->associnfo.associating = 1;
	/* queue lower level code to do work (if necessary) */
	schedule_delayed_work(&sm->associnfo.work, 0);
out:
	mutex_unlock(&sm->associnfo.mutex);

	return 0;
}
EXPORT_SYMBOL_GPL(ieee80211softmac_wx_set_essid);

int
ieee80211softmac_wx_get_essid(struct net_device *net_dev,
			      struct iw_request_info *info,
			      union iwreq_data *data,
			      char *extra)
{
	struct ieee80211softmac_device *sm = ieee80211_priv(net_dev);

	mutex_lock(&sm->associnfo.mutex);
	/* If all fails, return ANY (empty) */
	data->essid.length = 0;
	data->essid.flags = 0;  /* active */
	
	/* If we have a statically configured ESSID then return it */
	if (sm->associnfo.static_essid) {
		data->essid.length = sm->associnfo.req_essid.len;
		data->essid.flags = 1;  /* active */
		memcpy(extra, sm->associnfo.req_essid.data, sm->associnfo.req_essid.len);
	}
	
	/* If we're associating/associated, return that */
	if (sm->associnfo.associated || sm->associnfo.associating) {
		data->essid.length = sm->associnfo.associate_essid.len;
		data->essid.flags = 1;  /* active */
		memcpy(extra, sm->associnfo.associate_essid.data, sm->associnfo.associate_essid.len);
	}
	mutex_unlock(&sm->associnfo.mutex);

	return 0;
}
EXPORT_SYMBOL_GPL(ieee80211softmac_wx_get_essid);

int
ieee80211softmac_wx_set_rate(struct net_device *net_dev,
			     struct iw_request_info *info,
			     union iwreq_data *data,
			     char *extra)
{
	struct ieee80211softmac_device *mac = ieee80211_priv(net_dev);
	struct ieee80211_device *ieee = mac->ieee;
	unsigned long flags;
	s32 in_rate = data->bitrate.value;
	u8 rate;
	int is_ofdm = 0;
	int err = -EINVAL;

	if (in_rate == -1) {
		/* FIXME: We don't correctly handle backing down to lower
		   rates, so 801.11g devices start off at 11M for now. People
		   can manually change it if they really need to, but 11M is
		   more reliable. Note similar logic in
		   ieee80211softmac_wx_set_rate() */	 
		if (ieee->modulation & IEEE80211_CCK_MODULATION)
			in_rate = 11000000;
		else
			in_rate = 54000000;
	}

	switch (in_rate) {
	case 1000000:
		rate = IEEE80211_CCK_RATE_1MB;
		break;
	case 2000000:
		rate = IEEE80211_CCK_RATE_2MB;
		break;
	case 5500000:
		rate = IEEE80211_CCK_RATE_5MB;
		break;
	case 11000000:
		rate = IEEE80211_CCK_RATE_11MB;
		break;
	case 6000000:
		rate = IEEE80211_OFDM_RATE_6MB;
		is_ofdm = 1;
		break;
	case 9000000:
		rate = IEEE80211_OFDM_RATE_9MB;
		is_ofdm = 1;
		break;
	case 12000000:
		rate = IEEE80211_OFDM_RATE_12MB;
		is_ofdm = 1;
		break;
	case 18000000:
		rate = IEEE80211_OFDM_RATE_18MB;
		is_ofdm = 1;
		break;
	case 24000000:
		rate = IEEE80211_OFDM_RATE_24MB;
		is_ofdm = 1;
		break;
	case 36000000:
		rate = IEEE80211_OFDM_RATE_36MB;
		is_ofdm = 1;
		break;
	case 48000000:
		rate = IEEE80211_OFDM_RATE_48MB;
		is_ofdm = 1;
		break;
	case 54000000:
		rate = IEEE80211_OFDM_RATE_54MB;
		is_ofdm = 1;
		break;
	default:
		goto out;
	}

	spin_lock_irqsave(&mac->lock, flags);

	/* Check if correct modulation for this PHY. */
	if (is_ofdm && !(ieee->modulation & IEEE80211_OFDM_MODULATION))
		goto out_unlock;

	mac->txrates.user_rate = rate;
	ieee80211softmac_recalc_txrates(mac);
	err = 0;

out_unlock:	
	spin_unlock_irqrestore(&mac->lock, flags);
out:
	return err;
}
EXPORT_SYMBOL_GPL(ieee80211softmac_wx_set_rate);

int
ieee80211softmac_wx_get_rate(struct net_device *net_dev,
			     struct iw_request_info *info,
			     union iwreq_data *data,
			     char *extra)
{
	struct ieee80211softmac_device *mac = ieee80211_priv(net_dev);
	unsigned long flags;
	int err = -EINVAL;

	spin_lock_irqsave(&mac->lock, flags);
	switch (mac->txrates.default_rate) {
	case IEEE80211_CCK_RATE_1MB:
		data->bitrate.value = 1000000;
		break;
	case IEEE80211_CCK_RATE_2MB:
		data->bitrate.value = 2000000;
		break;
	case IEEE80211_CCK_RATE_5MB:
		data->bitrate.value = 5500000;
		break;
	case IEEE80211_CCK_RATE_11MB:
		data->bitrate.value = 11000000;
		break;
	case IEEE80211_OFDM_RATE_6MB:
		data->bitrate.value = 6000000;
		break;
	case IEEE80211_OFDM_RATE_9MB:
		data->bitrate.value = 9000000;
		break;
	case IEEE80211_OFDM_RATE_12MB:
		data->bitrate.value = 12000000;
		break;
	case IEEE80211_OFDM_RATE_18MB:
		data->bitrate.value = 18000000;
		break;
	case IEEE80211_OFDM_RATE_24MB:
		data->bitrate.value = 24000000;
		break;
	case IEEE80211_OFDM_RATE_36MB:
		data->bitrate.value = 36000000;
		break;
	case IEEE80211_OFDM_RATE_48MB:
		data->bitrate.value = 48000000;
		break;
	case IEEE80211_OFDM_RATE_54MB:
		data->bitrate.value = 54000000;
		break;
	default:
		assert(0);
		goto out_unlock;
	}
	err = 0;
out_unlock:
	spin_unlock_irqrestore(&mac->lock, flags);

	return err;
}
EXPORT_SYMBOL_GPL(ieee80211softmac_wx_get_rate);

int
ieee80211softmac_wx_get_wap(struct net_device *net_dev,
			    struct iw_request_info *info,
			    union iwreq_data *data,
			    char *extra)
{
	struct ieee80211softmac_device *mac = ieee80211_priv(net_dev);
	int err = 0;

	mutex_lock(&mac->associnfo.mutex);
	if (mac->associnfo.bssvalid)
		memcpy(data->ap_addr.sa_data, mac->associnfo.bssid, ETH_ALEN);
	else
		memset(data->ap_addr.sa_data, 0xff, ETH_ALEN);
	data->ap_addr.sa_family = ARPHRD_ETHER;
	mutex_unlock(&mac->associnfo.mutex);

	return err;
}
EXPORT_SYMBOL_GPL(ieee80211softmac_wx_get_wap);

int
ieee80211softmac_wx_set_wap(struct net_device *net_dev,
			    struct iw_request_info *info,
			    union iwreq_data *data,
			    char *extra)
{
	struct ieee80211softmac_device *mac = ieee80211_priv(net_dev);

	/* sanity check */
	if (data->ap_addr.sa_family != ARPHRD_ETHER) {
		return -EINVAL;
	}

	mutex_lock(&mac->associnfo.mutex);
	if (is_broadcast_ether_addr(data->ap_addr.sa_data)) {
		/* the bssid we have is not to be fixed any longer,
		 * and we should reassociate to the best AP. */
		mac->associnfo.bssfixed = 0;
		/* force reassociation */
		mac->associnfo.bssvalid = 0;
		if (mac->associnfo.associated)
			schedule_delayed_work(&mac->associnfo.work, 0);
	} else if (is_zero_ether_addr(data->ap_addr.sa_data)) {
		/* the bssid we have is no longer fixed */
		mac->associnfo.bssfixed = 0;
        } else {
		if (!memcmp(mac->associnfo.bssid, data->ap_addr.sa_data, ETH_ALEN)) {
			if (mac->associnfo.associating || mac->associnfo.associated) {
			/* bssid unchanged and associated or associating - just return */
				goto out;
			}
		} else {
			/* copy new value in data->ap_addr.sa_data to bssid */
			memcpy(mac->associnfo.bssid, data->ap_addr.sa_data, ETH_ALEN);
		}
		/* tell the other code that this bssid should be used no matter what */
		mac->associnfo.bssfixed = 1;
		/* queue associate if new bssid or (old one again and not associated) */
		schedule_delayed_work(&mac->associnfo.work, 0);
        }

 out:
	mutex_unlock(&mac->associnfo.mutex);

	return 0;
}
EXPORT_SYMBOL_GPL(ieee80211softmac_wx_set_wap);

int
ieee80211softmac_wx_set_genie(struct net_device *dev,
			      struct iw_request_info *info,
			      union iwreq_data *wrqu,
			      char *extra)
{
	struct ieee80211softmac_device *mac = ieee80211_priv(dev);
	unsigned long flags;
	int err = 0;
	char *buf;
	int i;

	mutex_lock(&mac->associnfo.mutex);
	spin_lock_irqsave(&mac->lock, flags);
	/* bleh. shouldn't be locked for that kmalloc... */

	if (wrqu->data.length) {
		if ((wrqu->data.length < 2) || (extra[1]+2 != wrqu->data.length)) {
			/* this is an IE, so the length must be
			 * correct. Is it possible though that
			 * more than one IE is passed in?
			 */
			err = -EINVAL;
			goto out;
		}
		if (mac->wpa.IEbuflen <= wrqu->data.length) {
			buf = kmalloc(wrqu->data.length, GFP_ATOMIC);
			if (!buf) {
				err = -ENOMEM;
				goto out;
			}
			kfree(mac->wpa.IE);
			mac->wpa.IE = buf;
			mac->wpa.IEbuflen = wrqu->data.length;
		}
		memcpy(mac->wpa.IE, extra, wrqu->data.length);
		dprintk(KERN_INFO PFX "generic IE set to ");
		for (i=0;i<wrqu->data.length;i++)
			dprintk("%.2x", (u8)mac->wpa.IE[i]);
		dprintk("\n");
		mac->wpa.IElen = wrqu->data.length;
	} else {
		kfree(mac->wpa.IE);
		mac->wpa.IE = NULL;
		mac->wpa.IElen = 0;
		mac->wpa.IEbuflen = 0;
	}

 out:	
	spin_unlock_irqrestore(&mac->lock, flags);
	mutex_unlock(&mac->associnfo.mutex);

	return err;
}
EXPORT_SYMBOL_GPL(ieee80211softmac_wx_set_genie);

int
ieee80211softmac_wx_get_genie(struct net_device *dev,
			      struct iw_request_info *info,
			      union iwreq_data *wrqu,
			      char *extra)
{
	struct ieee80211softmac_device *mac = ieee80211_priv(dev);
	unsigned long flags;
	int err = 0;
	int space = wrqu->data.length;

	mutex_lock(&mac->associnfo.mutex);
	spin_lock_irqsave(&mac->lock, flags);
	
	wrqu->data.length = 0;
	
	if (mac->wpa.IE && mac->wpa.IElen) {
		wrqu->data.length = mac->wpa.IElen;
		if (mac->wpa.IElen <= space)
			memcpy(extra, mac->wpa.IE, mac->wpa.IElen);
		else
			err = -E2BIG;
	}
	spin_unlock_irqrestore(&mac->lock, flags);
	mutex_unlock(&mac->associnfo.mutex);

	return err;
}
EXPORT_SYMBOL_GPL(ieee80211softmac_wx_get_genie);

int
ieee80211softmac_wx_set_mlme(struct net_device *dev,
			     struct iw_request_info *info,
			     union iwreq_data *wrqu,
			     char *extra)
{
	struct ieee80211softmac_device *mac = ieee80211_priv(dev);
	struct iw_mlme *mlme = (struct iw_mlme *)extra;
	u16 reason = cpu_to_le16(mlme->reason_code);
	struct ieee80211softmac_network *net;
	int err = -EINVAL;

	mutex_lock(&mac->associnfo.mutex);

	if (memcmp(mac->associnfo.bssid, mlme->addr.sa_data, ETH_ALEN)) {
		printk(KERN_DEBUG PFX "wx_set_mlme: requested operation on net we don't use\n");
		goto out;
	}

	switch (mlme->cmd) {
	case IW_MLME_DEAUTH:
		net = ieee80211softmac_get_network_by_bssid_locked(mac, mlme->addr.sa_data);
		if (!net) {
			printk(KERN_DEBUG PFX "wx_set_mlme: we should know the net here...\n");
			goto out;
		}
		err =  ieee80211softmac_deauth_req(mac, net, reason);
		goto out;
	case IW_MLME_DISASSOC:
		ieee80211softmac_send_disassoc_req(mac, reason);
		mac->associnfo.associated = 0;
		mac->associnfo.associating = 0;
		err = 0;
		goto out;
	default:
		err = -EOPNOTSUPP;
	}

out:
	mutex_unlock(&mac->associnfo.mutex);

	return err;
}
EXPORT_SYMBOL_GPL(ieee80211softmac_wx_set_mlme);