1 /* IEEE 802.11 SoftMAC layer
2 * Copyright (c) 2005 Andrea Merello <andrea.merello@gmail.com>
3 *
4 * Mostly extracted from the rtl8180-sa2400 driver for the
5 * in-kernel generic ieee802.11 stack.
6 *
7 * Some pieces of code might be stolen from ipw2100 driver
8 * copyright of who own it's copyright ;-)
9 *
10 * PS wx handler mostly stolen from hostap, copyright who
11 * own it's copyright ;-)
12 *
13 * released under the GPL
14 */
15
16
17 #include <linux/etherdevice.h>
18
19 #include "ieee80211.h"
20 #include "dot11d.h"
21 /* FIXME: add A freqs */
22
23 const long ieee80211_wlan_frequencies[] = {
24 2412, 2417, 2422, 2427,
25 2432, 2437, 2442, 2447,
26 2452, 2457, 2462, 2467,
27 2472, 2484
28 };
29 EXPORT_SYMBOL(ieee80211_wlan_frequencies);
30
ieee80211_wx_set_freq(struct ieee80211_device * ieee,struct iw_request_info * a,union iwreq_data * wrqu,char * b)31 int ieee80211_wx_set_freq(struct ieee80211_device *ieee, struct iw_request_info *a,
32 union iwreq_data *wrqu, char *b)
33 {
34 int ret;
35 struct iw_freq *fwrq = &wrqu->freq;
36
37 mutex_lock(&ieee->wx_mutex);
38
39 if (ieee->iw_mode == IW_MODE_INFRA) {
40 ret = -EOPNOTSUPP;
41 goto out;
42 }
43
44 /* if setting by freq convert to channel */
45 if (fwrq->e == 1) {
46 if ((fwrq->m >= (int) 2.412e8 &&
47 fwrq->m <= (int) 2.487e8)) {
48 int f = fwrq->m / 100000;
49 int c = 0;
50
51 while ((c < 14) && (f != ieee80211_wlan_frequencies[c]))
52 c++;
53
54 /* hack to fall through */
55 fwrq->e = 0;
56 fwrq->m = c + 1;
57 }
58 }
59
60 if (fwrq->e > 0 || fwrq->m > 14 || fwrq->m < 1) {
61 ret = -EOPNOTSUPP;
62 goto out;
63
64 } else { /* Set the channel */
65
66 if (!(GET_DOT11D_INFO(ieee)->channel_map)[fwrq->m]) {
67 ret = -EINVAL;
68 goto out;
69 }
70 ieee->current_network.channel = fwrq->m;
71 ieee->set_chan(ieee->dev, ieee->current_network.channel);
72
73 if (ieee->iw_mode == IW_MODE_ADHOC || ieee->iw_mode == IW_MODE_MASTER)
74 if (ieee->state == IEEE80211_LINKED) {
75 ieee80211_stop_send_beacons(ieee);
76 ieee80211_start_send_beacons(ieee);
77 }
78 }
79
80 ret = 0;
81 out:
82 mutex_unlock(&ieee->wx_mutex);
83 return ret;
84 }
85 EXPORT_SYMBOL(ieee80211_wx_set_freq);
86
ieee80211_wx_get_freq(struct ieee80211_device * ieee,struct iw_request_info * a,union iwreq_data * wrqu,char * b)87 int ieee80211_wx_get_freq(struct ieee80211_device *ieee,
88 struct iw_request_info *a,
89 union iwreq_data *wrqu, char *b)
90 {
91 struct iw_freq *fwrq = &wrqu->freq;
92
93 if (ieee->current_network.channel == 0)
94 return -1;
95 /* NM 0.7.0 will not accept channel any more. */
96 fwrq->m = ieee80211_wlan_frequencies[ieee->current_network.channel-1] * 100000;
97 fwrq->e = 1;
98 /* fwrq->m = ieee->current_network.channel; */
99 /* fwrq->e = 0; */
100
101 return 0;
102 }
103 EXPORT_SYMBOL(ieee80211_wx_get_freq);
104
ieee80211_wx_get_wap(struct ieee80211_device * ieee,struct iw_request_info * info,union iwreq_data * wrqu,char * extra)105 int ieee80211_wx_get_wap(struct ieee80211_device *ieee,
106 struct iw_request_info *info,
107 union iwreq_data *wrqu, char *extra)
108 {
109 unsigned long flags;
110
111 wrqu->ap_addr.sa_family = ARPHRD_ETHER;
112
113 if (ieee->iw_mode == IW_MODE_MONITOR)
114 return -1;
115
116 /* We want avoid to give to the user inconsistent infos*/
117 spin_lock_irqsave(&ieee->lock, flags);
118
119 if (ieee->state != IEEE80211_LINKED &&
120 ieee->state != IEEE80211_LINKED_SCANNING &&
121 ieee->wap_set == 0)
122
123 eth_zero_addr(wrqu->ap_addr.sa_data);
124 else
125 memcpy(wrqu->ap_addr.sa_data,
126 ieee->current_network.bssid, ETH_ALEN);
127
128 spin_unlock_irqrestore(&ieee->lock, flags);
129
130 return 0;
131 }
132 EXPORT_SYMBOL(ieee80211_wx_get_wap);
133
ieee80211_wx_set_wap(struct ieee80211_device * ieee,struct iw_request_info * info,union iwreq_data * awrq,char * extra)134 int ieee80211_wx_set_wap(struct ieee80211_device *ieee,
135 struct iw_request_info *info,
136 union iwreq_data *awrq,
137 char *extra)
138 {
139
140 int ret = 0;
141 unsigned long flags;
142
143 short ifup = ieee->proto_started; /* dev->flags & IFF_UP; */
144 struct sockaddr *temp = (struct sockaddr *)awrq;
145
146 ieee->sync_scan_hurryup = 1;
147
148 mutex_lock(&ieee->wx_mutex);
149 /* use ifconfig hw ether */
150 if (ieee->iw_mode == IW_MODE_MASTER) {
151 ret = -1;
152 goto out;
153 }
154
155 if (temp->sa_family != ARPHRD_ETHER) {
156 ret = -EINVAL;
157 goto out;
158 }
159
160 if (ifup)
161 ieee80211_stop_protocol(ieee);
162
163 /* just to avoid to give inconsistent infos in the
164 * get wx method. not really needed otherwise
165 */
166 spin_lock_irqsave(&ieee->lock, flags);
167
168 memcpy(ieee->current_network.bssid, temp->sa_data, ETH_ALEN);
169 ieee->wap_set = !is_zero_ether_addr(temp->sa_data);
170
171 spin_unlock_irqrestore(&ieee->lock, flags);
172
173 if (ifup)
174 ieee80211_start_protocol(ieee);
175 out:
176 mutex_unlock(&ieee->wx_mutex);
177 return ret;
178 }
179 EXPORT_SYMBOL(ieee80211_wx_set_wap);
180
ieee80211_wx_get_essid(struct ieee80211_device * ieee,struct iw_request_info * a,union iwreq_data * wrqu,char * b)181 int ieee80211_wx_get_essid(struct ieee80211_device *ieee, struct iw_request_info *a, union iwreq_data *wrqu, char *b)
182 {
183 int len, ret = 0;
184 unsigned long flags;
185
186 if (ieee->iw_mode == IW_MODE_MONITOR)
187 return -1;
188
189 /* We want avoid to give to the user inconsistent infos*/
190 spin_lock_irqsave(&ieee->lock, flags);
191
192 if (ieee->current_network.ssid[0] == '\0' ||
193 ieee->current_network.ssid_len == 0) {
194 ret = -1;
195 goto out;
196 }
197
198 if (ieee->state != IEEE80211_LINKED &&
199 ieee->state != IEEE80211_LINKED_SCANNING &&
200 ieee->ssid_set == 0) {
201 ret = -1;
202 goto out;
203 }
204 len = ieee->current_network.ssid_len;
205 wrqu->essid.length = len;
206 strncpy(b, ieee->current_network.ssid, len);
207 wrqu->essid.flags = 1;
208
209 out:
210 spin_unlock_irqrestore(&ieee->lock, flags);
211
212 return ret;
213
214 }
215 EXPORT_SYMBOL(ieee80211_wx_get_essid);
216
ieee80211_wx_set_rate(struct ieee80211_device * ieee,struct iw_request_info * info,union iwreq_data * wrqu,char * extra)217 int ieee80211_wx_set_rate(struct ieee80211_device *ieee,
218 struct iw_request_info *info,
219 union iwreq_data *wrqu, char *extra)
220 {
221
222 u32 target_rate = wrqu->bitrate.value;
223
224 ieee->rate = target_rate/100000;
225 /* FIXME: we might want to limit rate also in management protocols. */
226 return 0;
227 }
228 EXPORT_SYMBOL(ieee80211_wx_set_rate);
229
ieee80211_wx_get_rate(struct ieee80211_device * ieee,struct iw_request_info * info,union iwreq_data * wrqu,char * extra)230 int ieee80211_wx_get_rate(struct ieee80211_device *ieee,
231 struct iw_request_info *info,
232 union iwreq_data *wrqu, char *extra)
233 {
234 u32 tmp_rate;
235
236 tmp_rate = TxCountToDataRate(ieee, ieee->softmac_stats.CurrentShowTxate);
237
238 wrqu->bitrate.value = tmp_rate * 500000;
239
240 return 0;
241 }
242 EXPORT_SYMBOL(ieee80211_wx_get_rate);
243
ieee80211_wx_set_rts(struct ieee80211_device * ieee,struct iw_request_info * info,union iwreq_data * wrqu,char * extra)244 int ieee80211_wx_set_rts(struct ieee80211_device *ieee,
245 struct iw_request_info *info,
246 union iwreq_data *wrqu, char *extra)
247 {
248 if (wrqu->rts.disabled || !wrqu->rts.fixed)
249 ieee->rts = DEFAULT_RTS_THRESHOLD;
250 else {
251 if (wrqu->rts.value < MIN_RTS_THRESHOLD ||
252 wrqu->rts.value > MAX_RTS_THRESHOLD)
253 return -EINVAL;
254 ieee->rts = wrqu->rts.value;
255 }
256 return 0;
257 }
258 EXPORT_SYMBOL(ieee80211_wx_set_rts);
259
ieee80211_wx_get_rts(struct ieee80211_device * ieee,struct iw_request_info * info,union iwreq_data * wrqu,char * extra)260 int ieee80211_wx_get_rts(struct ieee80211_device *ieee,
261 struct iw_request_info *info,
262 union iwreq_data *wrqu, char *extra)
263 {
264 wrqu->rts.value = ieee->rts;
265 wrqu->rts.fixed = 0; /* no auto select */
266 wrqu->rts.disabled = (wrqu->rts.value == DEFAULT_RTS_THRESHOLD);
267 return 0;
268 }
269 EXPORT_SYMBOL(ieee80211_wx_get_rts);
270
ieee80211_wx_set_mode(struct ieee80211_device * ieee,struct iw_request_info * a,union iwreq_data * wrqu,char * b)271 int ieee80211_wx_set_mode(struct ieee80211_device *ieee, struct iw_request_info *a,
272 union iwreq_data *wrqu, char *b)
273 {
274
275 ieee->sync_scan_hurryup = 1;
276
277 mutex_lock(&ieee->wx_mutex);
278
279 if (wrqu->mode == ieee->iw_mode)
280 goto out;
281
282 if (wrqu->mode == IW_MODE_MONITOR)
283 ieee->dev->type = ARPHRD_IEEE80211;
284 else
285 ieee->dev->type = ARPHRD_ETHER;
286
287 if (!ieee->proto_started) {
288 ieee->iw_mode = wrqu->mode;
289 } else {
290 ieee80211_stop_protocol(ieee);
291 ieee->iw_mode = wrqu->mode;
292 ieee80211_start_protocol(ieee);
293 }
294
295 out:
296 mutex_unlock(&ieee->wx_mutex);
297 return 0;
298 }
299 EXPORT_SYMBOL(ieee80211_wx_set_mode);
300
ieee80211_wx_sync_scan_wq(struct work_struct * work)301 void ieee80211_wx_sync_scan_wq(struct work_struct *work)
302 {
303 struct ieee80211_device *ieee = container_of(work, struct ieee80211_device, wx_sync_scan_wq);
304 short chan;
305 enum ht_extension_chan_offset chan_offset = 0;
306 enum ht_channel_width bandwidth = 0;
307 int b40M = 0;
308
309 chan = ieee->current_network.channel;
310 netif_carrier_off(ieee->dev);
311
312 if (ieee->data_hard_stop)
313 ieee->data_hard_stop(ieee->dev);
314
315 ieee80211_stop_send_beacons(ieee);
316
317 ieee->state = IEEE80211_LINKED_SCANNING;
318 ieee->link_change(ieee->dev);
319 ieee->InitialGainHandler(ieee->dev, IG_Backup);
320 if (ieee->pHTInfo->bCurrentHTSupport && ieee->pHTInfo->bEnableHT && ieee->pHTInfo->bCurBW40MHz) {
321 b40M = 1;
322 chan_offset = ieee->pHTInfo->CurSTAExtChnlOffset;
323 bandwidth = (enum ht_channel_width)ieee->pHTInfo->bCurBW40MHz;
324 printk("Scan in 40M, force to 20M first:%d, %d\n", chan_offset, bandwidth);
325 ieee->SetBWModeHandler(ieee->dev, HT_CHANNEL_WIDTH_20, HT_EXTCHNL_OFFSET_NO_EXT);
326 }
327 ieee80211_start_scan_syncro(ieee);
328 if (b40M) {
329 printk("Scan in 20M, back to 40M\n");
330 if (chan_offset == HT_EXTCHNL_OFFSET_UPPER)
331 ieee->set_chan(ieee->dev, chan + 2);
332 else if (chan_offset == HT_EXTCHNL_OFFSET_LOWER)
333 ieee->set_chan(ieee->dev, chan - 2);
334 else
335 ieee->set_chan(ieee->dev, chan);
336 ieee->SetBWModeHandler(ieee->dev, bandwidth, chan_offset);
337 } else {
338 ieee->set_chan(ieee->dev, chan);
339 }
340
341 ieee->InitialGainHandler(ieee->dev, IG_Restore);
342 ieee->state = IEEE80211_LINKED;
343 ieee->link_change(ieee->dev);
344 /* To prevent the immediately calling watch_dog after scan. */
345 if (ieee->LinkDetectInfo.NumRecvBcnInPeriod == 0 || ieee->LinkDetectInfo.NumRecvDataInPeriod == 0) {
346 ieee->LinkDetectInfo.NumRecvBcnInPeriod = 1;
347 ieee->LinkDetectInfo.NumRecvDataInPeriod = 1;
348 }
349 if (ieee->data_hard_resume)
350 ieee->data_hard_resume(ieee->dev);
351
352 if (ieee->iw_mode == IW_MODE_ADHOC || ieee->iw_mode == IW_MODE_MASTER)
353 ieee80211_start_send_beacons(ieee);
354
355 netif_carrier_on(ieee->dev);
356 mutex_unlock(&ieee->wx_mutex);
357
358 }
359
ieee80211_wx_set_scan(struct ieee80211_device * ieee,struct iw_request_info * a,union iwreq_data * wrqu,char * b)360 int ieee80211_wx_set_scan(struct ieee80211_device *ieee, struct iw_request_info *a,
361 union iwreq_data *wrqu, char *b)
362 {
363 int ret = 0;
364
365 mutex_lock(&ieee->wx_mutex);
366
367 if (ieee->iw_mode == IW_MODE_MONITOR || !(ieee->proto_started)) {
368 ret = -1;
369 goto out;
370 }
371
372 if (ieee->state == IEEE80211_LINKED) {
373 queue_work(ieee->wq, &ieee->wx_sync_scan_wq);
374 /* intentionally forget to up sem */
375 return 0;
376 }
377
378 out:
379 mutex_unlock(&ieee->wx_mutex);
380 return ret;
381 }
382 EXPORT_SYMBOL(ieee80211_wx_set_scan);
383
ieee80211_wx_set_essid(struct ieee80211_device * ieee,struct iw_request_info * a,union iwreq_data * wrqu,char * extra)384 int ieee80211_wx_set_essid(struct ieee80211_device *ieee,
385 struct iw_request_info *a,
386 union iwreq_data *wrqu, char *extra)
387 {
388
389 int ret = 0, len;
390 short proto_started;
391 unsigned long flags;
392
393 ieee->sync_scan_hurryup = 1;
394 mutex_lock(&ieee->wx_mutex);
395
396 proto_started = ieee->proto_started;
397
398 if (wrqu->essid.length > IW_ESSID_MAX_SIZE) {
399 ret = -E2BIG;
400 goto out;
401 }
402
403 if (ieee->iw_mode == IW_MODE_MONITOR) {
404 ret = -1;
405 goto out;
406 }
407
408 if (proto_started)
409 ieee80211_stop_protocol(ieee);
410
411
412 /* this is just to be sure that the GET wx callback
413 * has consisten infos. not needed otherwise
414 */
415 spin_lock_irqsave(&ieee->lock, flags);
416
417 if (wrqu->essid.flags && wrqu->essid.length) {
418 /* first flush current network.ssid */
419 len = ((wrqu->essid.length-1) < IW_ESSID_MAX_SIZE) ? (wrqu->essid.length-1) : IW_ESSID_MAX_SIZE;
420 strncpy(ieee->current_network.ssid, extra, len+1);
421 ieee->current_network.ssid_len = len+1;
422 ieee->ssid_set = 1;
423 } else {
424 ieee->ssid_set = 0;
425 ieee->current_network.ssid[0] = '\0';
426 ieee->current_network.ssid_len = 0;
427 }
428 spin_unlock_irqrestore(&ieee->lock, flags);
429
430 if (proto_started)
431 ieee80211_start_protocol(ieee);
432 out:
433 mutex_unlock(&ieee->wx_mutex);
434 return ret;
435 }
436 EXPORT_SYMBOL(ieee80211_wx_set_essid);
437
ieee80211_wx_get_mode(struct ieee80211_device * ieee,struct iw_request_info * a,union iwreq_data * wrqu,char * b)438 int ieee80211_wx_get_mode(struct ieee80211_device *ieee, struct iw_request_info *a,
439 union iwreq_data *wrqu, char *b)
440 {
441
442 wrqu->mode = ieee->iw_mode;
443 return 0;
444 }
445 EXPORT_SYMBOL(ieee80211_wx_get_mode);
446
ieee80211_wx_set_rawtx(struct ieee80211_device * ieee,struct iw_request_info * info,union iwreq_data * wrqu,char * extra)447 int ieee80211_wx_set_rawtx(struct ieee80211_device *ieee,
448 struct iw_request_info *info,
449 union iwreq_data *wrqu, char *extra)
450 {
451
452 int *parms = (int *)extra;
453 int enable = (parms[0] > 0);
454 short prev = ieee->raw_tx;
455
456 mutex_lock(&ieee->wx_mutex);
457
458 if (enable)
459 ieee->raw_tx = 1;
460 else
461 ieee->raw_tx = 0;
462
463 printk(KERN_INFO"raw TX is %s\n",
464 ieee->raw_tx ? "enabled" : "disabled");
465
466 if (ieee->iw_mode == IW_MODE_MONITOR) {
467 if (prev == 0 && ieee->raw_tx) {
468 if (ieee->data_hard_resume)
469 ieee->data_hard_resume(ieee->dev);
470
471 netif_carrier_on(ieee->dev);
472 }
473
474 if (prev && ieee->raw_tx == 1)
475 netif_carrier_off(ieee->dev);
476 }
477
478 mutex_unlock(&ieee->wx_mutex);
479
480 return 0;
481 }
482 EXPORT_SYMBOL(ieee80211_wx_set_rawtx);
483
ieee80211_wx_get_name(struct ieee80211_device * ieee,struct iw_request_info * info,union iwreq_data * wrqu,char * extra)484 int ieee80211_wx_get_name(struct ieee80211_device *ieee,
485 struct iw_request_info *info,
486 union iwreq_data *wrqu, char *extra)
487 {
488 strlcpy(wrqu->name, "802.11", IFNAMSIZ);
489 if (ieee->modulation & IEEE80211_CCK_MODULATION) {
490 strlcat(wrqu->name, "b", IFNAMSIZ);
491 if (ieee->modulation & IEEE80211_OFDM_MODULATION)
492 strlcat(wrqu->name, "/g", IFNAMSIZ);
493 } else if (ieee->modulation & IEEE80211_OFDM_MODULATION) {
494 strlcat(wrqu->name, "g", IFNAMSIZ);
495 }
496
497 if (ieee->mode & (IEEE_N_24G | IEEE_N_5G))
498 strlcat(wrqu->name, "/n", IFNAMSIZ);
499
500 if ((ieee->state == IEEE80211_LINKED) ||
501 (ieee->state == IEEE80211_LINKED_SCANNING))
502 strlcat(wrqu->name, " linked", IFNAMSIZ);
503 else if (ieee->state != IEEE80211_NOLINK)
504 strlcat(wrqu->name, " link..", IFNAMSIZ);
505
506 return 0;
507 }
508 EXPORT_SYMBOL(ieee80211_wx_get_name);
509
510 /* this is mostly stolen from hostap */
ieee80211_wx_set_power(struct ieee80211_device * ieee,struct iw_request_info * info,union iwreq_data * wrqu,char * extra)511 int ieee80211_wx_set_power(struct ieee80211_device *ieee,
512 struct iw_request_info *info,
513 union iwreq_data *wrqu, char *extra)
514 {
515 int ret = 0;
516
517 mutex_lock(&ieee->wx_mutex);
518
519 if (wrqu->power.disabled) {
520 ieee->ps = IEEE80211_PS_DISABLED;
521 goto exit;
522 }
523 if (wrqu->power.flags & IW_POWER_TIMEOUT) {
524 /* ieee->ps_period = wrqu->power.value / 1000; */
525 ieee->ps_timeout = wrqu->power.value / 1000;
526 }
527
528 if (wrqu->power.flags & IW_POWER_PERIOD) {
529
530 /* ieee->ps_timeout = wrqu->power.value / 1000; */
531 ieee->ps_period = wrqu->power.value / 1000;
532 /* wrq->value / 1024; */
533
534 }
535 switch (wrqu->power.flags & IW_POWER_MODE) {
536 case IW_POWER_UNICAST_R:
537 ieee->ps = IEEE80211_PS_UNICAST;
538 break;
539 case IW_POWER_MULTICAST_R:
540 ieee->ps = IEEE80211_PS_MBCAST;
541 break;
542 case IW_POWER_ALL_R:
543 ieee->ps = IEEE80211_PS_UNICAST | IEEE80211_PS_MBCAST;
544 break;
545
546 case IW_POWER_ON:
547 /* ieee->ps = IEEE80211_PS_DISABLED; */
548 break;
549
550 default:
551 ret = -EINVAL;
552 goto exit;
553
554 }
555 exit:
556 mutex_unlock(&ieee->wx_mutex);
557 return ret;
558
559 }
560 EXPORT_SYMBOL(ieee80211_wx_set_power);
561
562 /* this is stolen from hostap */
ieee80211_wx_get_power(struct ieee80211_device * ieee,struct iw_request_info * info,union iwreq_data * wrqu,char * extra)563 int ieee80211_wx_get_power(struct ieee80211_device *ieee,
564 struct iw_request_info *info,
565 union iwreq_data *wrqu, char *extra)
566 {
567 mutex_lock(&ieee->wx_mutex);
568
569 if (ieee->ps == IEEE80211_PS_DISABLED) {
570 wrqu->power.disabled = 1;
571 goto exit;
572 }
573
574 wrqu->power.disabled = 0;
575
576 if ((wrqu->power.flags & IW_POWER_TYPE) == IW_POWER_TIMEOUT) {
577 wrqu->power.flags = IW_POWER_TIMEOUT;
578 wrqu->power.value = ieee->ps_timeout * 1000;
579 } else {
580 /* ret = -EOPNOTSUPP; */
581 /* goto exit; */
582 wrqu->power.flags = IW_POWER_PERIOD;
583 wrqu->power.value = ieee->ps_period * 1000;
584 /* ieee->current_network.dtim_period * ieee->current_network.beacon_interval * 1024; */
585 }
586
587 if ((ieee->ps & (IEEE80211_PS_MBCAST | IEEE80211_PS_UNICAST)) == (IEEE80211_PS_MBCAST | IEEE80211_PS_UNICAST))
588 wrqu->power.flags |= IW_POWER_ALL_R;
589 else if (ieee->ps & IEEE80211_PS_MBCAST)
590 wrqu->power.flags |= IW_POWER_MULTICAST_R;
591 else
592 wrqu->power.flags |= IW_POWER_UNICAST_R;
593
594 exit:
595 mutex_unlock(&ieee->wx_mutex);
596 return 0;
597
598 }
599 EXPORT_SYMBOL(ieee80211_wx_get_power);
600
