?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
mac80211: fix notify_mac function
[linux-2.6/sactl.git] / net / mac80211 / mlme.c
blob14d165f0df75ff90e1ec9648b4454245cdbcd153
1 /*
2 * BSS client mode implementation
3 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/netdevice.h>
18 #include <linux/if_arp.h>
19 #include <linux/wireless.h>
20 #include <linux/random.h>
21 #include <linux/etherdevice.h>
22 #include <linux/rtnetlink.h>
23 #include <net/iw_handler.h>
24 #include <net/mac80211.h>
25 #include <asm/unaligned.h>
26
27 #include "ieee80211_i.h"
28 #include "rate.h"
29 #include "led.h"
30
31 #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
32 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
33 #define IEEE80211_AUTH_MAX_TRIES 3
34 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
35 #define IEEE80211_ASSOC_MAX_TRIES 3
36 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
37 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
38 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
39 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
40 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
41 #define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
42
43 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
44 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
45
46 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
47
48
49 /* utils */
50 static int ecw2cw(int ecw)
51 {
52 return (1 << ecw) - 1;
53 }
54
55 static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
56 {
57 u8 *end, *pos;
58
59 pos = bss->ies;
60 if (pos == NULL)
61 return NULL;
62 end = pos + bss->ies_len;
63
64 while (pos + 1 < end) {
65 if (pos + 2 + pos[1] > end)
66 break;
67 if (pos[0] == ie)
68 return pos;
69 pos += 2 + pos[1];
70 }
71
72 return NULL;
73 }
74
75 static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
76 struct ieee80211_supported_band *sband,
77 u64 *rates)
78 {
79 int i, j, count;
80 *rates = 0;
81 count = 0;
82 for (i = 0; i < bss->supp_rates_len; i++) {
83 int rate = (bss->supp_rates[i] & 0x7F) * 5;
84
85 for (j = 0; j < sband->n_bitrates; j++)
86 if (sband->bitrates[j].bitrate == rate) {
87 *rates |= BIT(j);
88 count++;
89 break;
90 }
91 }
92
93 return count;
94 }
95
96 /* also used by mesh code */
97 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
98 struct ieee802_11_elems *elems,
99 enum ieee80211_band band)
100 {
101 struct ieee80211_supported_band *sband;
102 struct ieee80211_rate *bitrates;
103 size_t num_rates;
104 u64 supp_rates;
105 int i, j;
106 sband = local->hw.wiphy->bands[band];
107
108 if (!sband) {
109 WARN_ON(1);
110 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
111 }
112
113 bitrates = sband->bitrates;
114 num_rates = sband->n_bitrates;
115 supp_rates = 0;
116 for (i = 0; i < elems->supp_rates_len +
117 elems->ext_supp_rates_len; i++) {
118 u8 rate = 0;
119 int own_rate;
120 if (i < elems->supp_rates_len)
121 rate = elems->supp_rates[i];
122 else if (elems->ext_supp_rates)
123 rate = elems->ext_supp_rates
124 [i - elems->supp_rates_len];
125 own_rate = 5 * (rate & 0x7f);
126 for (j = 0; j < num_rates; j++)
127 if (bitrates[j].bitrate == own_rate)
128 supp_rates |= BIT(j);
129 }
130 return supp_rates;
131 }
132
133 /* frame sending functions */
134
135 /* also used by scanning code */
136 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
137 u8 *ssid, size_t ssid_len)
138 {
139 struct ieee80211_local *local = sdata->local;
140 struct ieee80211_supported_band *sband;
141 struct sk_buff *skb;
142 struct ieee80211_mgmt *mgmt;
143 u8 *pos, *supp_rates, *esupp_rates = NULL;
144 int i;
145
146 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
147 if (!skb) {
148 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
149 "request\n", sdata->dev->name);
150 return;
151 }
152 skb_reserve(skb, local->hw.extra_tx_headroom);
153
154 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
155 memset(mgmt, 0, 24);
156 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
157 IEEE80211_STYPE_PROBE_REQ);
158 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
159 if (dst) {
160 memcpy(mgmt->da, dst, ETH_ALEN);
161 memcpy(mgmt->bssid, dst, ETH_ALEN);
162 } else {
163 memset(mgmt->da, 0xff, ETH_ALEN);
164 memset(mgmt->bssid, 0xff, ETH_ALEN);
165 }
166 pos = skb_put(skb, 2 + ssid_len);
167 *pos++ = WLAN_EID_SSID;
168 *pos++ = ssid_len;
169 memcpy(pos, ssid, ssid_len);
170
171 supp_rates = skb_put(skb, 2);
172 supp_rates[0] = WLAN_EID_SUPP_RATES;
173 supp_rates[1] = 0;
174 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
175
176 for (i = 0; i < sband->n_bitrates; i++) {
177 struct ieee80211_rate *rate = &sband->bitrates[i];
178 if (esupp_rates) {
179 pos = skb_put(skb, 1);
180 esupp_rates[1]++;
181 } else if (supp_rates[1] == 8) {
182 esupp_rates = skb_put(skb, 3);
183 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
184 esupp_rates[1] = 1;
185 pos = &esupp_rates[2];
186 } else {
187 pos = skb_put(skb, 1);
188 supp_rates[1]++;
189 }
190 *pos = rate->bitrate / 5;
191 }
192
193 ieee80211_tx_skb(sdata, skb, 0);
194 }
195
196 static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
197 struct ieee80211_if_sta *ifsta,
198 int transaction, u8 *extra, size_t extra_len,
199 int encrypt)
200 {
201 struct ieee80211_local *local = sdata->local;
202 struct sk_buff *skb;
203 struct ieee80211_mgmt *mgmt;
204
205 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
206 sizeof(*mgmt) + 6 + extra_len);
207 if (!skb) {
208 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
209 "frame\n", sdata->dev->name);
210 return;
211 }
212 skb_reserve(skb, local->hw.extra_tx_headroom);
213
214 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
215 memset(mgmt, 0, 24 + 6);
216 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
217 IEEE80211_STYPE_AUTH);
218 if (encrypt)
219 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
220 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
221 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
222 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
223 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
224 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
225 ifsta->auth_transaction = transaction + 1;
226 mgmt->u.auth.status_code = cpu_to_le16(0);
227 if (extra)
228 memcpy(skb_put(skb, extra_len), extra, extra_len);
229
230 ieee80211_tx_skb(sdata, skb, encrypt);
231 }
232
233 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
234 struct ieee80211_if_sta *ifsta)
235 {
236 struct ieee80211_local *local = sdata->local;
237 struct sk_buff *skb;
238 struct ieee80211_mgmt *mgmt;
239 u8 *pos, *ies, *ht_add_ie;
240 int i, len, count, rates_len, supp_rates_len;
241 u16 capab;
242 struct ieee80211_bss *bss;
243 int wmm = 0;
244 struct ieee80211_supported_band *sband;
245 u64 rates = 0;
246
247 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
248 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
249 ifsta->ssid_len);
250 if (!skb) {
251 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
252 "frame\n", sdata->dev->name);
253 return;
254 }
255 skb_reserve(skb, local->hw.extra_tx_headroom);
256
257 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
258
259 capab = ifsta->capab;
260
261 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
262 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
263 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
264 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
265 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
266 }
267
268 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
269 local->hw.conf.channel->center_freq,
270 ifsta->ssid, ifsta->ssid_len);
271 if (bss) {
272 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
273 capab |= WLAN_CAPABILITY_PRIVACY;
274 if (bss->wmm_used)
275 wmm = 1;
276
277 /* get all rates supported by the device and the AP as
278 * some APs don't like getting a superset of their rates
279 * in the association request (e.g. D-Link DAP 1353 in
280 * b-only mode) */
281 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
282
283 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
284 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
285 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
286
287 ieee80211_rx_bss_put(local, bss);
288 } else {
289 rates = ~0;
290 rates_len = sband->n_bitrates;
291 }
292
293 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
294 memset(mgmt, 0, 24);
295 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
296 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
297 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
298
299 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
300 skb_put(skb, 10);
301 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
302 IEEE80211_STYPE_REASSOC_REQ);
303 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
304 mgmt->u.reassoc_req.listen_interval =
305 cpu_to_le16(local->hw.conf.listen_interval);
306 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
307 ETH_ALEN);
308 } else {
309 skb_put(skb, 4);
310 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
311 IEEE80211_STYPE_ASSOC_REQ);
312 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
313 mgmt->u.reassoc_req.listen_interval =
314 cpu_to_le16(local->hw.conf.listen_interval);
315 }
316
317 /* SSID */
318 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
319 *pos++ = WLAN_EID_SSID;
320 *pos++ = ifsta->ssid_len;
321 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
322
323 /* add all rates which were marked to be used above */
324 supp_rates_len = rates_len;
325 if (supp_rates_len > 8)
326 supp_rates_len = 8;
327
328 len = sband->n_bitrates;
329 pos = skb_put(skb, supp_rates_len + 2);
330 *pos++ = WLAN_EID_SUPP_RATES;
331 *pos++ = supp_rates_len;
332
333 count = 0;
334 for (i = 0; i < sband->n_bitrates; i++) {
335 if (BIT(i) & rates) {
336 int rate = sband->bitrates[i].bitrate;
337 *pos++ = (u8) (rate / 5);
338 if (++count == 8)
339 break;
340 }
341 }
342
343 if (rates_len > count) {
344 pos = skb_put(skb, rates_len - count + 2);
345 *pos++ = WLAN_EID_EXT_SUPP_RATES;
346 *pos++ = rates_len - count;
347
348 for (i++; i < sband->n_bitrates; i++) {
349 if (BIT(i) & rates) {
350 int rate = sband->bitrates[i].bitrate;
351 *pos++ = (u8) (rate / 5);
352 }
353 }
354 }
355
356 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
357 /* 1. power capabilities */
358 pos = skb_put(skb, 4);
359 *pos++ = WLAN_EID_PWR_CAPABILITY;
360 *pos++ = 2;
361 *pos++ = 0; /* min tx power */
362 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
363
364 /* 2. supported channels */
365 /* TODO: get this in reg domain format */
366 pos = skb_put(skb, 2 * sband->n_channels + 2);
367 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
368 *pos++ = 2 * sband->n_channels;
369 for (i = 0; i < sband->n_channels; i++) {
370 *pos++ = ieee80211_frequency_to_channel(
371 sband->channels[i].center_freq);
372 *pos++ = 1; /* one channel in the subband*/
373 }
374 }
375
376 if (ifsta->extra_ie) {
377 pos = skb_put(skb, ifsta->extra_ie_len);
378 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
379 }
380
381 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
382 pos = skb_put(skb, 9);
383 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
384 *pos++ = 7; /* len */
385 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
386 *pos++ = 0x50;
387 *pos++ = 0xf2;
388 *pos++ = 2; /* WME */
389 *pos++ = 0; /* WME info */
390 *pos++ = 1; /* WME ver */
391 *pos++ = 0;
392 }
393
394 /* wmm support is a must to HT */
395 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
396 sband->ht_info.ht_supported &&
397 (ht_add_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_EXTRA_INFO))) {
398 struct ieee80211_ht_addt_info *ht_add_info =
399 (struct ieee80211_ht_addt_info *)ht_add_ie;
400 u16 cap = sband->ht_info.cap;
401 __le16 tmp;
402 u32 flags = local->hw.conf.channel->flags;
403
404 switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) {
405 case IEEE80211_HT_IE_CHA_SEC_ABOVE:
406 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
407 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
408 cap &= ~IEEE80211_HT_CAP_SGI_40;
409 }
410 break;
411 case IEEE80211_HT_IE_CHA_SEC_BELOW:
412 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
413 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
414 cap &= ~IEEE80211_HT_CAP_SGI_40;
415 }
416 break;
417 }
418
419 tmp = cpu_to_le16(cap);
420 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
421 *pos++ = WLAN_EID_HT_CAPABILITY;
422 *pos++ = sizeof(struct ieee80211_ht_cap);
423 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
424 memcpy(pos, &tmp, sizeof(u16));
425 pos += sizeof(u16);
426 /* TODO: needs a define here for << 2 */
427 *pos++ = sband->ht_info.ampdu_factor |
428 (sband->ht_info.ampdu_density << 2);
429 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
430 }
431
432 kfree(ifsta->assocreq_ies);
433 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
434 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
435 if (ifsta->assocreq_ies)
436 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
437
438 ieee80211_tx_skb(sdata, skb, 0);
439 }
440
441
442 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
443 u16 stype, u16 reason)
444 {
445 struct ieee80211_local *local = sdata->local;
446 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
447 struct sk_buff *skb;
448 struct ieee80211_mgmt *mgmt;
449
450 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
451 if (!skb) {
452 printk(KERN_DEBUG "%s: failed to allocate buffer for "
453 "deauth/disassoc frame\n", sdata->dev->name);
454 return;
455 }
456 skb_reserve(skb, local->hw.extra_tx_headroom);
457
458 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
459 memset(mgmt, 0, 24);
460 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
461 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
462 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
463 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
464 skb_put(skb, 2);
465 /* u.deauth.reason_code == u.disassoc.reason_code */
466 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
467
468 ieee80211_tx_skb(sdata, skb, 0);
469 }
470
471 /* MLME */
472 static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
473 struct ieee80211_bss *bss)
474 {
475 struct ieee80211_local *local = sdata->local;
476 int i, have_higher_than_11mbit = 0;
477
478 /* cf. IEEE 802.11 9.2.12 */
479 for (i = 0; i < bss->supp_rates_len; i++)
480 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
481 have_higher_than_11mbit = 1;
482
483 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
484 have_higher_than_11mbit)
485 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
486 else
487 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
488
489 ieee80211_set_wmm_default(sdata);
490 }
491
492 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
493 struct ieee80211_if_sta *ifsta,
494 u8 *wmm_param, size_t wmm_param_len)
495 {
496 struct ieee80211_tx_queue_params params;
497 size_t left;
498 int count;
499 u8 *pos;
500
501 if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
502 return;
503
504 if (!wmm_param)
505 return;
506
507 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
508 return;
509 count = wmm_param[6] & 0x0f;
510 if (count == ifsta->wmm_last_param_set)
511 return;
512 ifsta->wmm_last_param_set = count;
513
514 pos = wmm_param + 8;
515 left = wmm_param_len - 8;
516
517 memset(&params, 0, sizeof(params));
518
519 if (!local->ops->conf_tx)
520 return;
521
522 local->wmm_acm = 0;
523 for (; left >= 4; left -= 4, pos += 4) {
524 int aci = (pos[0] >> 5) & 0x03;
525 int acm = (pos[0] >> 4) & 0x01;
526 int queue;
527
528 switch (aci) {
529 case 1:
530 queue = 3;
531 if (acm)
532 local->wmm_acm |= BIT(0) | BIT(3);
533 break;
534 case 2:
535 queue = 1;
536 if (acm)
537 local->wmm_acm |= BIT(4) | BIT(5);
538 break;
539 case 3:
540 queue = 0;
541 if (acm)
542 local->wmm_acm |= BIT(6) | BIT(7);
543 break;
544 case 0:
545 default:
546 queue = 2;
547 if (acm)
548 local->wmm_acm |= BIT(1) | BIT(2);
549 break;
550 }
551
552 params.aifs = pos[0] & 0x0f;
553 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
554 params.cw_min = ecw2cw(pos[1] & 0x0f);
555 params.txop = get_unaligned_le16(pos + 2);
556 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
557 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
558 "cWmin=%d cWmax=%d txop=%d\n",
559 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
560 params.cw_max, params.txop);
561 #endif
562 /* TODO: handle ACM (block TX, fallback to next lowest allowed
563 * AC for now) */
564 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
565 printk(KERN_DEBUG "%s: failed to set TX queue "
566 "parameters for queue %d\n", local->mdev->name, queue);
567 }
568 }
569 }
570
571 static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
572 bool use_protection,
573 bool use_short_preamble)
574 {
575 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
576 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
577 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
578 DECLARE_MAC_BUF(mac);
579 #endif
580 u32 changed = 0;
581
582 if (use_protection != bss_conf->use_cts_prot) {
583 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
584 if (net_ratelimit()) {
585 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
586 "%s)\n",
587 sdata->dev->name,
588 use_protection ? "enabled" : "disabled",
589 print_mac(mac, ifsta->bssid));
590 }
591 #endif
592 bss_conf->use_cts_prot = use_protection;
593 changed |= BSS_CHANGED_ERP_CTS_PROT;
594 }
595
596 if (use_short_preamble != bss_conf->use_short_preamble) {
597 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
598 if (net_ratelimit()) {
599 printk(KERN_DEBUG "%s: switched to %s barker preamble"
600 " (BSSID=%s)\n",
601 sdata->dev->name,
602 use_short_preamble ? "short" : "long",
603 print_mac(mac, ifsta->bssid));
604 }
605 #endif
606 bss_conf->use_short_preamble = use_short_preamble;
607 changed |= BSS_CHANGED_ERP_PREAMBLE;
608 }
609
610 return changed;
611 }
612
613 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
614 u8 erp_value)
615 {
616 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
617 bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
618
619 return ieee80211_handle_protect_preamb(sdata,
620 use_protection, use_short_preamble);
621 }
622
623 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
624 struct ieee80211_bss *bss)
625 {
626 u32 changed = 0;
627
628 if (bss->has_erp_value)
629 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
630 else {
631 u16 capab = bss->capability;
632 changed |= ieee80211_handle_protect_preamb(sdata, false,
633 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
634 }
635
636 return changed;
637 }
638
639 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata,
640 struct ieee80211_if_sta *ifsta)
641 {
642 union iwreq_data wrqu;
643 memset(&wrqu, 0, sizeof(wrqu));
644 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
645 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
646 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
647 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
648 }
649
650 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata,
651 struct ieee80211_if_sta *ifsta)
652 {
653 char *buf;
654 size_t len;
655 int i;
656 union iwreq_data wrqu;
657
658 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
659 return;
660
661 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
662 ifsta->assocresp_ies_len), GFP_KERNEL);
663 if (!buf)
664 return;
665
666 len = sprintf(buf, "ASSOCINFO(");
667 if (ifsta->assocreq_ies) {
668 len += sprintf(buf + len, "ReqIEs=");
669 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
670 len += sprintf(buf + len, "%02x",
671 ifsta->assocreq_ies[i]);
672 }
673 }
674 if (ifsta->assocresp_ies) {
675 if (ifsta->assocreq_ies)
676 len += sprintf(buf + len, " ");
677 len += sprintf(buf + len, "RespIEs=");
678 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
679 len += sprintf(buf + len, "%02x",
680 ifsta->assocresp_ies[i]);
681 }
682 }
683 len += sprintf(buf + len, ")");
684
685 if (len > IW_CUSTOM_MAX) {
686 len = sprintf(buf, "ASSOCRESPIE=");
687 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
688 len += sprintf(buf + len, "%02x",
689 ifsta->assocresp_ies[i]);
690 }
691 }
692
693 if (len <= IW_CUSTOM_MAX) {
694 memset(&wrqu, 0, sizeof(wrqu));
695 wrqu.data.length = len;
696 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
697 }
698
699 kfree(buf);
700 }
701
702
703 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
704 struct ieee80211_if_sta *ifsta)
705 {
706 struct ieee80211_local *local = sdata->local;
707 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
708 u32 changed = BSS_CHANGED_ASSOC;
709
710 struct ieee80211_bss *bss;
711
712 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
713
714 if (sdata->vif.type != NL80211_IFTYPE_STATION)
715 return;
716
717 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
718 conf->channel->center_freq,
719 ifsta->ssid, ifsta->ssid_len);
720 if (bss) {
721 /* set timing information */
722 sdata->bss_conf.beacon_int = bss->beacon_int;
723 sdata->bss_conf.timestamp = bss->timestamp;
724 sdata->bss_conf.dtim_period = bss->dtim_period;
725
726 changed |= ieee80211_handle_bss_capability(sdata, bss);
727
728 ieee80211_rx_bss_put(local, bss);
729 }
730
731 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
732 changed |= BSS_CHANGED_HT;
733 sdata->bss_conf.assoc_ht = 1;
734 sdata->bss_conf.ht_conf = &conf->ht_conf;
735 sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
736 }
737
738 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
739 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
740 ieee80211_sta_send_associnfo(sdata, ifsta);
741
742 ifsta->last_probe = jiffies;
743 ieee80211_led_assoc(local, 1);
744
745 sdata->bss_conf.assoc = 1;
746 /*
747 * For now just always ask the driver to update the basic rateset
748 * when we have associated, we aren't checking whether it actually
749 * changed or not.
750 */
751 changed |= BSS_CHANGED_BASIC_RATES;
752 ieee80211_bss_info_change_notify(sdata, changed);
753
754 netif_tx_start_all_queues(sdata->dev);
755 netif_carrier_on(sdata->dev);
756
757 ieee80211_sta_send_apinfo(sdata, ifsta);
758 }
759
760 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
761 struct ieee80211_if_sta *ifsta)
762 {
763 DECLARE_MAC_BUF(mac);
764
765 ifsta->direct_probe_tries++;
766 if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
767 printk(KERN_DEBUG "%s: direct probe to AP %s timed out\n",
768 sdata->dev->name, print_mac(mac, ifsta->bssid));
769 ifsta->state = IEEE80211_STA_MLME_DISABLED;
770 return;
771 }
772
773 printk(KERN_DEBUG "%s: direct probe to AP %s try %d\n",
774 sdata->dev->name, print_mac(mac, ifsta->bssid),
775 ifsta->direct_probe_tries);
776
777 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
778
779 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request);
780
781 /* Direct probe is sent to broadcast address as some APs
782 * will not answer to direct packet in unassociated state.
783 */
784 ieee80211_send_probe_req(sdata, NULL,
785 ifsta->ssid, ifsta->ssid_len);
786
787 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
788 }
789
790
791 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
792 struct ieee80211_if_sta *ifsta)
793 {
794 DECLARE_MAC_BUF(mac);
795
796 ifsta->auth_tries++;
797 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
798 printk(KERN_DEBUG "%s: authentication with AP %s"
799 " timed out\n",
800 sdata->dev->name, print_mac(mac, ifsta->bssid));
801 ifsta->state = IEEE80211_STA_MLME_DISABLED;
802 return;
803 }
804
805 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
806 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
807 sdata->dev->name, print_mac(mac, ifsta->bssid));
808
809 ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
810
811 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
812 }
813
814 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
815 struct ieee80211_if_sta *ifsta, bool deauth,
816 bool self_disconnected, u16 reason)
817 {
818 struct ieee80211_local *local = sdata->local;
819 struct sta_info *sta;
820 u32 changed = BSS_CHANGED_ASSOC;
821
822 rcu_read_lock();
823
824 sta = sta_info_get(local, ifsta->bssid);
825 if (!sta) {
826 rcu_read_unlock();
827 return;
828 }
829
830 if (deauth) {
831 ifsta->direct_probe_tries = 0;
832 ifsta->auth_tries = 0;
833 }
834 ifsta->assoc_scan_tries = 0;
835 ifsta->assoc_tries = 0;
836
837 netif_tx_stop_all_queues(sdata->dev);
838 netif_carrier_off(sdata->dev);
839
840 ieee80211_sta_tear_down_BA_sessions(sdata, sta->sta.addr);
841
842 if (self_disconnected) {
843 if (deauth)
844 ieee80211_send_deauth_disassoc(sdata,
845 IEEE80211_STYPE_DEAUTH, reason);
846 else
847 ieee80211_send_deauth_disassoc(sdata,
848 IEEE80211_STYPE_DISASSOC, reason);
849 }
850
851 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
852 changed |= ieee80211_reset_erp_info(sdata);
853
854 if (sdata->bss_conf.assoc_ht)
855 changed |= BSS_CHANGED_HT;
856
857 sdata->bss_conf.assoc_ht = 0;
858 sdata->bss_conf.ht_conf = NULL;
859 sdata->bss_conf.ht_bss_conf = NULL;
860
861 ieee80211_led_assoc(local, 0);
862 sdata->bss_conf.assoc = 0;
863
864 ieee80211_sta_send_apinfo(sdata, ifsta);
865
866 if (self_disconnected)
867 ifsta->state = IEEE80211_STA_MLME_DISABLED;
868
869 sta_info_unlink(&sta);
870
871 rcu_read_unlock();
872
873 sta_info_destroy(sta);
874 }
875
876 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
877 {
878 if (!sdata || !sdata->default_key ||
879 sdata->default_key->conf.alg != ALG_WEP)
880 return 0;
881 return 1;
882 }
883
884 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
885 struct ieee80211_if_sta *ifsta)
886 {
887 struct ieee80211_local *local = sdata->local;
888 struct ieee80211_bss *bss;
889 int bss_privacy;
890 int wep_privacy;
891 int privacy_invoked;
892
893 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
894 return 0;
895
896 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
897 local->hw.conf.channel->center_freq,
898 ifsta->ssid, ifsta->ssid_len);
899 if (!bss)
900 return 0;
901
902 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
903 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
904 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
905
906 ieee80211_rx_bss_put(local, bss);
907
908 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
909 return 0;
910
911 return 1;
912 }
913
914 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
915 struct ieee80211_if_sta *ifsta)
916 {
917 DECLARE_MAC_BUF(mac);
918
919 ifsta->assoc_tries++;
920 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
921 printk(KERN_DEBUG "%s: association with AP %s"
922 " timed out\n",
923 sdata->dev->name, print_mac(mac, ifsta->bssid));
924 ifsta->state = IEEE80211_STA_MLME_DISABLED;
925 return;
926 }
927
928 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
929 printk(KERN_DEBUG "%s: associate with AP %s\n",
930 sdata->dev->name, print_mac(mac, ifsta->bssid));
931 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
932 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
933 "mixed-cell disabled - abort association\n", sdata->dev->name);
934 ifsta->state = IEEE80211_STA_MLME_DISABLED;
935 return;
936 }
937
938 ieee80211_send_assoc(sdata, ifsta);
939
940 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
941 }
942
943
944 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
945 struct ieee80211_if_sta *ifsta)
946 {
947 struct ieee80211_local *local = sdata->local;
948 struct sta_info *sta;
949 int disassoc;
950 DECLARE_MAC_BUF(mac);
951
952 /* TODO: start monitoring current AP signal quality and number of
953 * missed beacons. Scan other channels every now and then and search
954 * for better APs. */
955 /* TODO: remove expired BSSes */
956
957 ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
958
959 rcu_read_lock();
960
961 sta = sta_info_get(local, ifsta->bssid);
962 if (!sta) {
963 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
964 sdata->dev->name, print_mac(mac, ifsta->bssid));
965 disassoc = 1;
966 } else {
967 disassoc = 0;
968 if (time_after(jiffies,
969 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
970 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
971 printk(KERN_DEBUG "%s: No ProbeResp from "
972 "current AP %s - assume out of "
973 "range\n",
974 sdata->dev->name, print_mac(mac, ifsta->bssid));
975 disassoc = 1;
976 } else
977 ieee80211_send_probe_req(sdata, ifsta->bssid,
978 ifsta->ssid,
979 ifsta->ssid_len);
980 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
981 } else {
982 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
983 if (time_after(jiffies, ifsta->last_probe +
984 IEEE80211_PROBE_INTERVAL)) {
985 ifsta->last_probe = jiffies;
986 ieee80211_send_probe_req(sdata, ifsta->bssid,
987 ifsta->ssid,
988 ifsta->ssid_len);
989 }
990 }
991 }
992
993 rcu_read_unlock();
994
995 if (disassoc)
996 ieee80211_set_disassoc(sdata, ifsta, true, true,
997 WLAN_REASON_PREV_AUTH_NOT_VALID);
998 else
999 mod_timer(&ifsta->timer, jiffies +
1000 IEEE80211_MONITORING_INTERVAL);
1001 }
1002
1003
1004 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
1005 struct ieee80211_if_sta *ifsta)
1006 {
1007 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1008 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1009 ieee80211_associate(sdata, ifsta);
1010 }
1011
1012
1013 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1014 struct ieee80211_if_sta *ifsta,
1015 struct ieee80211_mgmt *mgmt,
1016 size_t len)
1017 {
1018 u8 *pos;
1019 struct ieee802_11_elems elems;
1020
1021 pos = mgmt->u.auth.variable;
1022 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1023 if (!elems.challenge)
1024 return;
1025 ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
1026 elems.challenge_len + 2, 1);
1027 }
1028
1029 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1030 struct ieee80211_if_sta *ifsta,
1031 struct ieee80211_mgmt *mgmt,
1032 size_t len)
1033 {
1034 u16 auth_alg, auth_transaction, status_code;
1035 DECLARE_MAC_BUF(mac);
1036
1037 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
1038 sdata->vif.type != NL80211_IFTYPE_ADHOC)
1039 return;
1040
1041 if (len < 24 + 6)
1042 return;
1043
1044 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
1045 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1046 return;
1047
1048 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
1049 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1050 return;
1051
1052 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1053 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1054 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1055
1056 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
1057 /*
1058 * IEEE 802.11 standard does not require authentication in IBSS
1059 * networks and most implementations do not seem to use it.
1060 * However, try to reply to authentication attempts if someone
1061 * has actually implemented this.
1062 */
1063 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
1064 return;
1065 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
1066 }
1067
1068 if (auth_alg != ifsta->auth_alg ||
1069 auth_transaction != ifsta->auth_transaction)
1070 return;
1071
1072 if (status_code != WLAN_STATUS_SUCCESS) {
1073 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1074 u8 algs[3];
1075 const int num_algs = ARRAY_SIZE(algs);
1076 int i, pos;
1077 algs[0] = algs[1] = algs[2] = 0xff;
1078 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1079 algs[0] = WLAN_AUTH_OPEN;
1080 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1081 algs[1] = WLAN_AUTH_SHARED_KEY;
1082 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1083 algs[2] = WLAN_AUTH_LEAP;
1084 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1085 pos = 0;
1086 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1087 pos = 1;
1088 else
1089 pos = 2;
1090 for (i = 0; i < num_algs; i++) {
1091 pos++;
1092 if (pos >= num_algs)
1093 pos = 0;
1094 if (algs[pos] == ifsta->auth_alg ||
1095 algs[pos] == 0xff)
1096 continue;
1097 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1098 !ieee80211_sta_wep_configured(sdata))
1099 continue;
1100 ifsta->auth_alg = algs[pos];
1101 break;
1102 }
1103 }
1104 return;
1105 }
1106
1107 switch (ifsta->auth_alg) {
1108 case WLAN_AUTH_OPEN:
1109 case WLAN_AUTH_LEAP:
1110 ieee80211_auth_completed(sdata, ifsta);
1111 break;
1112 case WLAN_AUTH_SHARED_KEY:
1113 if (ifsta->auth_transaction == 4)
1114 ieee80211_auth_completed(sdata, ifsta);
1115 else
1116 ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
1117 break;
1118 }
1119 }
1120
1121
1122 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1123 struct ieee80211_if_sta *ifsta,
1124 struct ieee80211_mgmt *mgmt,
1125 size_t len)
1126 {
1127 u16 reason_code;
1128 DECLARE_MAC_BUF(mac);
1129
1130 if (len < 24 + 2)
1131 return;
1132
1133 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1134 return;
1135
1136 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1137
1138 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
1139 printk(KERN_DEBUG "%s: deauthenticated\n", sdata->dev->name);
1140
1141 if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1142 ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
1143 ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1144 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1145 mod_timer(&ifsta->timer, jiffies +
1146 IEEE80211_RETRY_AUTH_INTERVAL);
1147 }
1148
1149 ieee80211_set_disassoc(sdata, ifsta, true, false, 0);
1150 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1151 }
1152
1153
1154 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1155 struct ieee80211_if_sta *ifsta,
1156 struct ieee80211_mgmt *mgmt,
1157 size_t len)
1158 {
1159 u16 reason_code;
1160 DECLARE_MAC_BUF(mac);
1161
1162 if (len < 24 + 2)
1163 return;
1164
1165 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1166 return;
1167
1168 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1169
1170 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1171 printk(KERN_DEBUG "%s: disassociated\n", sdata->dev->name);
1172
1173 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1174 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
1175 mod_timer(&ifsta->timer, jiffies +
1176 IEEE80211_RETRY_AUTH_INTERVAL);
1177 }
1178
1179 ieee80211_set_disassoc(sdata, ifsta, false, false, 0);
1180 }
1181
1182
1183 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1184 struct ieee80211_if_sta *ifsta,
1185 struct ieee80211_mgmt *mgmt,
1186 size_t len,
1187 int reassoc)
1188 {
1189 struct ieee80211_local *local = sdata->local;
1190 struct ieee80211_supported_band *sband;
1191 struct sta_info *sta;
1192 u64 rates, basic_rates;
1193 u16 capab_info, status_code, aid;
1194 struct ieee802_11_elems elems;
1195 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1196 u8 *pos;
1197 int i, j;
1198 DECLARE_MAC_BUF(mac);
1199 bool have_higher_than_11mbit = false;
1200
1201 /* AssocResp and ReassocResp have identical structure, so process both
1202 * of them in this function. */
1203
1204 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
1205 return;
1206
1207 if (len < 24 + 6)
1208 return;
1209
1210 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1211 return;
1212
1213 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1214 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1215 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1216
1217 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1218 "status=%d aid=%d)\n",
1219 sdata->dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1220 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1221
1222 if (status_code != WLAN_STATUS_SUCCESS) {
1223 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1224 sdata->dev->name, status_code);
1225 /* if this was a reassociation, ensure we try a "full"
1226 * association next time. This works around some broken APs
1227 * which do not correctly reject reassociation requests. */
1228 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1229 return;
1230 }
1231
1232 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1233 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1234 "set\n", sdata->dev->name, aid);
1235 aid &= ~(BIT(15) | BIT(14));
1236
1237 pos = mgmt->u.assoc_resp.variable;
1238 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1239
1240 if (!elems.supp_rates) {
1241 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1242 sdata->dev->name);
1243 return;
1244 }
1245
1246 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1247 ifsta->aid = aid;
1248 ifsta->ap_capab = capab_info;
1249
1250 kfree(ifsta->assocresp_ies);
1251 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1252 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1253 if (ifsta->assocresp_ies)
1254 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1255
1256 rcu_read_lock();
1257
1258 /* Add STA entry for the AP */
1259 sta = sta_info_get(local, ifsta->bssid);
1260 if (!sta) {
1261 struct ieee80211_bss *bss;
1262 int err;
1263
1264 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1265 if (!sta) {
1266 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1267 " the AP\n", sdata->dev->name);
1268 rcu_read_unlock();
1269 return;
1270 }
1271 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
1272 local->hw.conf.channel->center_freq,
1273 ifsta->ssid, ifsta->ssid_len);
1274 if (bss) {
1275 sta->last_signal = bss->signal;
1276 sta->last_qual = bss->qual;
1277 sta->last_noise = bss->noise;
1278 ieee80211_rx_bss_put(local, bss);
1279 }
1280
1281 err = sta_info_insert(sta);
1282 if (err) {
1283 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1284 " the AP (error %d)\n", sdata->dev->name, err);
1285 rcu_read_unlock();
1286 return;
1287 }
1288 /* update new sta with its last rx activity */
1289 sta->last_rx = jiffies;
1290 }
1291
1292 /*
1293 * FIXME: Do we really need to update the sta_info's information here?
1294 * We already know about the AP (we found it in our list) so it
1295 * should already be filled with the right info, no?
1296 * As is stands, all this is racy because typically we assume
1297 * the information that is filled in here (except flags) doesn't
1298 * change while a STA structure is alive. As such, it should move
1299 * to between the sta_info_alloc() and sta_info_insert() above.
1300 */
1301
1302 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1303 WLAN_STA_AUTHORIZED);
1304
1305 rates = 0;
1306 basic_rates = 0;
1307 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1308
1309 for (i = 0; i < elems.supp_rates_len; i++) {
1310 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1311
1312 if (rate > 110)
1313 have_higher_than_11mbit = true;
1314
1315 for (j = 0; j < sband->n_bitrates; j++) {
1316 if (sband->bitrates[j].bitrate == rate)
1317 rates |= BIT(j);
1318 if (elems.supp_rates[i] & 0x80)
1319 basic_rates |= BIT(j);
1320 }
1321 }
1322
1323 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1324 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1325
1326 if (rate > 110)
1327 have_higher_than_11mbit = true;
1328
1329 for (j = 0; j < sband->n_bitrates; j++) {
1330 if (sband->bitrates[j].bitrate == rate)
1331 rates |= BIT(j);
1332 if (elems.ext_supp_rates[i] & 0x80)
1333 basic_rates |= BIT(j);
1334 }
1335 }
1336
1337 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1338 sdata->bss_conf.basic_rates = basic_rates;
1339
1340 /* cf. IEEE 802.11 9.2.12 */
1341 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1342 have_higher_than_11mbit)
1343 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1344 else
1345 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1346
1347 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1348 (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
1349 struct ieee80211_ht_bss_info bss_info;
1350 ieee80211_ht_cap_ie_to_ht_info(
1351 elems.ht_cap_elem, &sta->sta.ht_info);
1352 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1353 elems.ht_info_elem, &bss_info);
1354 ieee80211_handle_ht(local, 1, &sta->sta.ht_info, &bss_info);
1355 }
1356
1357 rate_control_rate_init(sta);
1358
1359 if (elems.wmm_param) {
1360 set_sta_flags(sta, WLAN_STA_WME);
1361 rcu_read_unlock();
1362 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1363 elems.wmm_param_len);
1364 } else
1365 rcu_read_unlock();
1366
1367 /* set AID and assoc capability,
1368 * ieee80211_set_associated() will tell the driver */
1369 bss_conf->aid = aid;
1370 bss_conf->assoc_capability = capab_info;
1371 ieee80211_set_associated(sdata, ifsta);
1372
1373 ieee80211_associated(sdata, ifsta);
1374 }
1375
1376
1377 static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
1378 struct ieee80211_if_sta *ifsta,
1379 struct ieee80211_bss *bss)
1380 {
1381 struct ieee80211_local *local = sdata->local;
1382 int res, rates, i, j;
1383 struct sk_buff *skb;
1384 struct ieee80211_mgmt *mgmt;
1385 u8 *pos;
1386 struct ieee80211_supported_band *sband;
1387 union iwreq_data wrqu;
1388
1389 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1390
1391 /* Remove possible STA entries from other IBSS networks. */
1392 sta_info_flush_delayed(sdata);
1393
1394 if (local->ops->reset_tsf) {
1395 /* Reset own TSF to allow time synchronization work. */
1396 local->ops->reset_tsf(local_to_hw(local));
1397 }
1398 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
1399 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
1400 if (res)
1401 return res;
1402
1403 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
1404
1405 sdata->drop_unencrypted = bss->capability &
1406 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
1407
1408 res = ieee80211_set_freq(sdata, bss->freq);
1409
1410 if (res)
1411 return res;
1412
1413 /* Build IBSS probe response */
1414 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
1415 if (skb) {
1416 skb_reserve(skb, local->hw.extra_tx_headroom);
1417
1418 mgmt = (struct ieee80211_mgmt *)
1419 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
1420 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
1421 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1422 IEEE80211_STYPE_PROBE_RESP);
1423 memset(mgmt->da, 0xff, ETH_ALEN);
1424 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1425 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1426 mgmt->u.beacon.beacon_int =
1427 cpu_to_le16(local->hw.conf.beacon_int);
1428 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
1429 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
1430
1431 pos = skb_put(skb, 2 + ifsta->ssid_len);
1432 *pos++ = WLAN_EID_SSID;
1433 *pos++ = ifsta->ssid_len;
1434 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
1435
1436 rates = bss->supp_rates_len;
1437 if (rates > 8)
1438 rates = 8;
1439 pos = skb_put(skb, 2 + rates);
1440 *pos++ = WLAN_EID_SUPP_RATES;
1441 *pos++ = rates;
1442 memcpy(pos, bss->supp_rates, rates);
1443
1444 if (bss->band == IEEE80211_BAND_2GHZ) {
1445 pos = skb_put(skb, 2 + 1);
1446 *pos++ = WLAN_EID_DS_PARAMS;
1447 *pos++ = 1;
1448 *pos++ = ieee80211_frequency_to_channel(bss->freq);
1449 }
1450
1451 pos = skb_put(skb, 2 + 2);
1452 *pos++ = WLAN_EID_IBSS_PARAMS;
1453 *pos++ = 2;
1454 /* FIX: set ATIM window based on scan results */
1455 *pos++ = 0;
1456 *pos++ = 0;
1457
1458 if (bss->supp_rates_len > 8) {
1459 rates = bss->supp_rates_len - 8;
1460 pos = skb_put(skb, 2 + rates);
1461 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1462 *pos++ = rates;
1463 memcpy(pos, &bss->supp_rates[8], rates);
1464 }
1465
1466 ifsta->probe_resp = skb;
1467
1468 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
1469 }
1470
1471 rates = 0;
1472 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1473 for (i = 0; i < bss->supp_rates_len; i++) {
1474 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
1475 for (j = 0; j < sband->n_bitrates; j++)
1476 if (sband->bitrates[j].bitrate == bitrate)
1477 rates |= BIT(j);
1478 }
1479 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
1480
1481 ieee80211_sta_def_wmm_params(sdata, bss);
1482
1483 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
1484 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1485
1486 ieee80211_led_assoc(local, true);
1487
1488 memset(&wrqu, 0, sizeof(wrqu));
1489 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
1490 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
1491
1492 return res;
1493 }
1494
1495 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1496 struct ieee80211_mgmt *mgmt,
1497 size_t len,
1498 struct ieee80211_rx_status *rx_status,
1499 struct ieee802_11_elems *elems,
1500 bool beacon)
1501 {
1502 struct ieee80211_local *local = sdata->local;
1503 int freq;
1504 struct ieee80211_bss *bss;
1505 struct sta_info *sta;
1506 struct ieee80211_channel *channel;
1507 u64 beacon_timestamp, rx_timestamp;
1508 u64 supp_rates = 0;
1509 enum ieee80211_band band = rx_status->band;
1510 DECLARE_MAC_BUF(mac);
1511 DECLARE_MAC_BUF(mac2);
1512
1513 if (elems->ds_params && elems->ds_params_len == 1)
1514 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1515 else
1516 freq = rx_status->freq;
1517
1518 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1519
1520 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1521 return;
1522
1523 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && elems->supp_rates &&
1524 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1525 supp_rates = ieee80211_sta_get_rates(local, elems, band);
1526
1527 rcu_read_lock();
1528
1529 sta = sta_info_get(local, mgmt->sa);
1530 if (sta) {
1531 u64 prev_rates;
1532
1533 prev_rates = sta->sta.supp_rates[band];
1534 /* make sure mandatory rates are always added */
1535 sta->sta.supp_rates[band] = supp_rates |
1536 ieee80211_mandatory_rates(local, band);
1537
1538 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1539 if (sta->sta.supp_rates[band] != prev_rates)
1540 printk(KERN_DEBUG "%s: updated supp_rates set "
1541 "for %s based on beacon info (0x%llx | "
1542 "0x%llx -> 0x%llx)\n",
1543 sdata->dev->name,
1544 print_mac(mac, sta->sta.addr),
1545 (unsigned long long) prev_rates,
1546 (unsigned long long) supp_rates,
1547 (unsigned long long) sta->sta.supp_rates[band]);
1548 #endif
1549 } else {
1550 ieee80211_ibss_add_sta(sdata, NULL, mgmt->bssid,
1551 mgmt->sa, supp_rates);
1552 }
1553
1554 rcu_read_unlock();
1555 }
1556
1557 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1558 freq, beacon);
1559 if (!bss)
1560 return;
1561
1562 /* was just updated in ieee80211_bss_info_update */
1563 beacon_timestamp = bss->timestamp;
1564
1565 /*
1566 * In STA mode, the remaining parameters should not be overridden
1567 * by beacons because they're not necessarily accurate there.
1568 */
1569 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
1570 bss->last_probe_resp && beacon) {
1571 ieee80211_rx_bss_put(local, bss);
1572 return;
1573 }
1574
1575 /* check if we need to merge IBSS */
1576 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && beacon &&
1577 bss->capability & WLAN_CAPABILITY_IBSS &&
1578 bss->freq == local->oper_channel->center_freq &&
1579 elems->ssid_len == sdata->u.sta.ssid_len &&
1580 memcmp(elems->ssid, sdata->u.sta.ssid,
1581 sdata->u.sta.ssid_len) == 0) {
1582 if (rx_status->flag & RX_FLAG_TSFT) {
1583 /* in order for correct IBSS merging we need mactime
1584 *
1585 * since mactime is defined as the time the first data
1586 * symbol of the frame hits the PHY, and the timestamp
1587 * of the beacon is defined as "the time that the data
1588 * symbol containing the first bit of the timestamp is
1589 * transmitted to the PHY plus the transmitting STA’s
1590 * delays through its local PHY from the MAC-PHY
1591 * interface to its interface with the WM"
1592 * (802.11 11.1.2) - equals the time this bit arrives at
1593 * the receiver - we have to take into account the
1594 * offset between the two.
1595 * e.g: at 1 MBit that means mactime is 192 usec earlier
1596 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
1597 */
1598 int rate = local->hw.wiphy->bands[band]->
1599 bitrates[rx_status->rate_idx].bitrate;
1600 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
1601 } else if (local && local->ops && local->ops->get_tsf)
1602 /* second best option: get current TSF */
1603 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
1604 else
1605 /* can't merge without knowing the TSF */
1606 rx_timestamp = -1LLU;
1607 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1608 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
1609 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
1610 print_mac(mac, mgmt->sa),
1611 print_mac(mac2, mgmt->bssid),
1612 (unsigned long long)rx_timestamp,
1613 (unsigned long long)beacon_timestamp,
1614 (unsigned long long)(rx_timestamp - beacon_timestamp),
1615 jiffies);
1616 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1617 if (beacon_timestamp > rx_timestamp) {
1618 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1619 printk(KERN_DEBUG "%s: beacon TSF higher than "
1620 "local TSF - IBSS merge with BSSID %s\n",
1621 sdata->dev->name, print_mac(mac, mgmt->bssid));
1622 #endif
1623 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
1624 ieee80211_ibss_add_sta(sdata, NULL,
1625 mgmt->bssid, mgmt->sa,
1626 supp_rates);
1627 }
1628 }
1629
1630 ieee80211_rx_bss_put(local, bss);
1631 }
1632
1633
1634 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1635 struct ieee80211_mgmt *mgmt,
1636 size_t len,
1637 struct ieee80211_rx_status *rx_status)
1638 {
1639 size_t baselen;
1640 struct ieee802_11_elems elems;
1641 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1642
1643 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1644 return; /* ignore ProbeResp to foreign address */
1645
1646 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1647 if (baselen > len)
1648 return;
1649
1650 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1651 &elems);
1652
1653 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1654
1655 /* direct probe may be part of the association flow */
1656 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1657 &ifsta->request)) {
1658 printk(KERN_DEBUG "%s direct probe responded\n",
1659 sdata->dev->name);
1660 ieee80211_authenticate(sdata, ifsta);
1661 }
1662 }
1663
1664
1665 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1666 struct ieee80211_mgmt *mgmt,
1667 size_t len,
1668 struct ieee80211_rx_status *rx_status)
1669 {
1670 struct ieee80211_if_sta *ifsta;
1671 size_t baselen;
1672 struct ieee802_11_elems elems;
1673 struct ieee80211_local *local = sdata->local;
1674 struct ieee80211_conf *conf = &local->hw.conf;
1675 u32 changed = 0;
1676
1677 /* Process beacon from the current BSS */
1678 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1679 if (baselen > len)
1680 return;
1681
1682 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1683
1684 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
1685
1686 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1687 return;
1688 ifsta = &sdata->u.sta;
1689
1690 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
1691 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1692 return;
1693
1694 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1695 elems.wmm_param_len);
1696
1697 if (elems.erp_info && elems.erp_info_len >= 1)
1698 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
1699 else {
1700 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
1701 changed |= ieee80211_handle_protect_preamb(sdata, false,
1702 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
1703 }
1704
1705 if (elems.ht_cap_elem && elems.ht_info_elem &&
1706 elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
1707 struct ieee80211_ht_bss_info bss_info;
1708
1709 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1710 elems.ht_info_elem, &bss_info);
1711 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
1712 &bss_info);
1713 }
1714
1715 ieee80211_bss_info_change_notify(sdata, changed);
1716 }
1717
1718
1719 static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
1720 struct ieee80211_if_sta *ifsta,
1721 struct ieee80211_mgmt *mgmt,
1722 size_t len,
1723 struct ieee80211_rx_status *rx_status)
1724 {
1725 struct ieee80211_local *local = sdata->local;
1726 int tx_last_beacon;
1727 struct sk_buff *skb;
1728 struct ieee80211_mgmt *resp;
1729 u8 *pos, *end;
1730 DECLARE_MAC_BUF(mac);
1731 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1732 DECLARE_MAC_BUF(mac2);
1733 DECLARE_MAC_BUF(mac3);
1734 #endif
1735
1736 if (sdata->vif.type != NL80211_IFTYPE_ADHOC ||
1737 ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
1738 len < 24 + 2 || !ifsta->probe_resp)
1739 return;
1740
1741 if (local->ops->tx_last_beacon)
1742 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1743 else
1744 tx_last_beacon = 1;
1745
1746 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1747 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
1748 "%s (tx_last_beacon=%d)\n",
1749 sdata->dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
1750 print_mac(mac3, mgmt->bssid), tx_last_beacon);
1751 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1752
1753 if (!tx_last_beacon)
1754 return;
1755
1756 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1757 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1758 return;
1759
1760 end = ((u8 *) mgmt) + len;
1761 pos = mgmt->u.probe_req.variable;
1762 if (pos[0] != WLAN_EID_SSID ||
1763 pos + 2 + pos[1] > end) {
1764 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1765 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
1766 "from %s\n",
1767 sdata->dev->name, print_mac(mac, mgmt->sa));
1768 #endif
1769 return;
1770 }
1771 if (pos[1] != 0 &&
1772 (pos[1] != ifsta->ssid_len ||
1773 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1774 /* Ignore ProbeReq for foreign SSID */
1775 return;
1776 }
1777
1778 /* Reply with ProbeResp */
1779 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
1780 if (!skb)
1781 return;
1782
1783 resp = (struct ieee80211_mgmt *) skb->data;
1784 memcpy(resp->da, mgmt->sa, ETH_ALEN);
1785 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1786 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
1787 sdata->dev->name, print_mac(mac, resp->da));
1788 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1789 ieee80211_tx_skb(sdata, skb, 0);
1790 }
1791
1792 void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
1793 struct ieee80211_rx_status *rx_status)
1794 {
1795 struct ieee80211_local *local = sdata->local;
1796 struct ieee80211_if_sta *ifsta;
1797 struct ieee80211_mgmt *mgmt;
1798 u16 fc;
1799
1800 if (skb->len < 24)
1801 goto fail;
1802
1803 ifsta = &sdata->u.sta;
1804
1805 mgmt = (struct ieee80211_mgmt *) skb->data;
1806 fc = le16_to_cpu(mgmt->frame_control);
1807
1808 switch (fc & IEEE80211_FCTL_STYPE) {
1809 case IEEE80211_STYPE_PROBE_REQ:
1810 case IEEE80211_STYPE_PROBE_RESP:
1811 case IEEE80211_STYPE_BEACON:
1812 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1813 case IEEE80211_STYPE_AUTH:
1814 case IEEE80211_STYPE_ASSOC_RESP:
1815 case IEEE80211_STYPE_REASSOC_RESP:
1816 case IEEE80211_STYPE_DEAUTH:
1817 case IEEE80211_STYPE_DISASSOC:
1818 skb_queue_tail(&ifsta->skb_queue, skb);
1819 queue_work(local->hw.workqueue, &ifsta->work);
1820 return;
1821 }
1822
1823 fail:
1824 kfree_skb(skb);
1825 }
1826
1827 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1828 struct sk_buff *skb)
1829 {
1830 struct ieee80211_rx_status *rx_status;
1831 struct ieee80211_if_sta *ifsta;
1832 struct ieee80211_mgmt *mgmt;
1833 u16 fc;
1834
1835 ifsta = &sdata->u.sta;
1836
1837 rx_status = (struct ieee80211_rx_status *) skb->cb;
1838 mgmt = (struct ieee80211_mgmt *) skb->data;
1839 fc = le16_to_cpu(mgmt->frame_control);
1840
1841 switch (fc & IEEE80211_FCTL_STYPE) {
1842 case IEEE80211_STYPE_PROBE_REQ:
1843 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len,
1844 rx_status);
1845 break;
1846 case IEEE80211_STYPE_PROBE_RESP:
1847 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
1848 break;
1849 case IEEE80211_STYPE_BEACON:
1850 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
1851 break;
1852 case IEEE80211_STYPE_AUTH:
1853 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
1854 break;
1855 case IEEE80211_STYPE_ASSOC_RESP:
1856 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
1857 break;
1858 case IEEE80211_STYPE_REASSOC_RESP:
1859 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
1860 break;
1861 case IEEE80211_STYPE_DEAUTH:
1862 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
1863 break;
1864 case IEEE80211_STYPE_DISASSOC:
1865 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
1866 break;
1867 }
1868
1869 kfree_skb(skb);
1870 }
1871
1872
1873 static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
1874 {
1875 struct ieee80211_local *local = sdata->local;
1876 int active = 0;
1877 struct sta_info *sta;
1878
1879 rcu_read_lock();
1880
1881 list_for_each_entry_rcu(sta, &local->sta_list, list) {
1882 if (sta->sdata == sdata &&
1883 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
1884 jiffies)) {
1885 active++;
1886 break;
1887 }
1888 }
1889
1890 rcu_read_unlock();
1891
1892 return active;
1893 }
1894
1895
1896 static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
1897 struct ieee80211_if_sta *ifsta)
1898 {
1899 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1900
1901 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
1902 if (ieee80211_sta_active_ibss(sdata))
1903 return;
1904
1905 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
1906 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
1907 ieee80211_request_scan(sdata, ifsta->ssid, ifsta->ssid_len);
1908 }
1909
1910
1911 static void ieee80211_sta_timer(unsigned long data)
1912 {
1913 struct ieee80211_sub_if_data *sdata =
1914 (struct ieee80211_sub_if_data *) data;
1915 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1916 struct ieee80211_local *local = sdata->local;
1917
1918 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1919 queue_work(local->hw.workqueue, &ifsta->work);
1920 }
1921
1922 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
1923 struct ieee80211_if_sta *ifsta)
1924 {
1925 struct ieee80211_local *local = sdata->local;
1926
1927 if (local->ops->reset_tsf) {
1928 /* Reset own TSF to allow time synchronization work. */
1929 local->ops->reset_tsf(local_to_hw(local));
1930 }
1931
1932 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
1933
1934
1935 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1936 ifsta->auth_alg = WLAN_AUTH_OPEN;
1937 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1938 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
1939 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1940 ifsta->auth_alg = WLAN_AUTH_LEAP;
1941 else
1942 ifsta->auth_alg = WLAN_AUTH_OPEN;
1943 ifsta->auth_transaction = -1;
1944 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
1945 ifsta->assoc_scan_tries = 0;
1946 ifsta->direct_probe_tries = 0;
1947 ifsta->auth_tries = 0;
1948 ifsta->assoc_tries = 0;
1949 netif_tx_stop_all_queues(sdata->dev);
1950 netif_carrier_off(sdata->dev);
1951 }
1952
1953
1954 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
1955 const char *ssid, int ssid_len)
1956 {
1957 int tmp, hidden_ssid;
1958
1959 if (ssid_len == ifsta->ssid_len &&
1960 !memcmp(ifsta->ssid, ssid, ssid_len))
1961 return 1;
1962
1963 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
1964 return 0;
1965
1966 hidden_ssid = 1;
1967 tmp = ssid_len;
1968 while (tmp--) {
1969 if (ssid[tmp] != '\0') {
1970 hidden_ssid = 0;
1971 break;
1972 }
1973 }
1974
1975 if (hidden_ssid && ifsta->ssid_len == ssid_len)
1976 return 1;
1977
1978 if (ssid_len == 1 && ssid[0] == ' ')
1979 return 1;
1980
1981 return 0;
1982 }
1983
1984 static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
1985 struct ieee80211_if_sta *ifsta)
1986 {
1987 struct ieee80211_local *local = sdata->local;
1988 struct ieee80211_bss *bss;
1989 struct ieee80211_supported_band *sband;
1990 u8 bssid[ETH_ALEN], *pos;
1991 int i;
1992 int ret;
1993 DECLARE_MAC_BUF(mac);
1994
1995 #if 0
1996 /* Easier testing, use fixed BSSID. */
1997 memset(bssid, 0xfe, ETH_ALEN);
1998 #else
1999 /* Generate random, not broadcast, locally administered BSSID. Mix in
2000 * own MAC address to make sure that devices that do not have proper
2001 * random number generator get different BSSID. */
2002 get_random_bytes(bssid, ETH_ALEN);
2003 for (i = 0; i < ETH_ALEN; i++)
2004 bssid[i] ^= sdata->dev->dev_addr[i];
2005 bssid[0] &= ~0x01;
2006 bssid[0] |= 0x02;
2007 #endif
2008
2009 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
2010 sdata->dev->name, print_mac(mac, bssid));
2011
2012 bss = ieee80211_rx_bss_add(local, bssid,
2013 local->hw.conf.channel->center_freq,
2014 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
2015 if (!bss)
2016 return -ENOMEM;
2017
2018 bss->band = local->hw.conf.channel->band;
2019 sband = local->hw.wiphy->bands[bss->band];
2020
2021 if (local->hw.conf.beacon_int == 0)
2022 local->hw.conf.beacon_int = 100;
2023 bss->beacon_int = local->hw.conf.beacon_int;
2024 bss->last_update = jiffies;
2025 bss->capability = WLAN_CAPABILITY_IBSS;
2026
2027 if (sdata->default_key)
2028 bss->capability |= WLAN_CAPABILITY_PRIVACY;
2029 else
2030 sdata->drop_unencrypted = 0;
2031
2032 bss->supp_rates_len = sband->n_bitrates;
2033 pos = bss->supp_rates;
2034 for (i = 0; i < sband->n_bitrates; i++) {
2035 int rate = sband->bitrates[i].bitrate;
2036 *pos++ = (u8) (rate / 5);
2037 }
2038
2039 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
2040 ieee80211_rx_bss_put(local, bss);
2041 return ret;
2042 }
2043
2044
2045 static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
2046 struct ieee80211_if_sta *ifsta)
2047 {
2048 struct ieee80211_local *local = sdata->local;
2049 struct ieee80211_bss *bss;
2050 int found = 0;
2051 u8 bssid[ETH_ALEN];
2052 int active_ibss;
2053 DECLARE_MAC_BUF(mac);
2054 DECLARE_MAC_BUF(mac2);
2055
2056 if (ifsta->ssid_len == 0)
2057 return -EINVAL;
2058
2059 active_ibss = ieee80211_sta_active_ibss(sdata);
2060 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2061 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2062 sdata->dev->name, active_ibss);
2063 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2064 spin_lock_bh(&local->bss_lock);
2065 list_for_each_entry(bss, &local->bss_list, list) {
2066 if (ifsta->ssid_len != bss->ssid_len ||
2067 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2068 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2069 continue;
2070 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2071 printk(KERN_DEBUG " bssid=%s found\n",
2072 print_mac(mac, bss->bssid));
2073 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2074 memcpy(bssid, bss->bssid, ETH_ALEN);
2075 found = 1;
2076 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2077 break;
2078 }
2079 spin_unlock_bh(&local->bss_lock);
2080
2081 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2082 if (found)
2083 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
2084 "%s\n", print_mac(mac, bssid),
2085 print_mac(mac2, ifsta->bssid));
2086 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2087
2088 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2089 int ret;
2090 int search_freq;
2091
2092 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2093 search_freq = bss->freq;
2094 else
2095 search_freq = local->hw.conf.channel->center_freq;
2096
2097 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
2098 ifsta->ssid, ifsta->ssid_len);
2099 if (!bss)
2100 goto dont_join;
2101
2102 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
2103 " based on configured SSID\n",
2104 sdata->dev->name, print_mac(mac, bssid));
2105 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
2106 ieee80211_rx_bss_put(local, bss);
2107 return ret;
2108 }
2109
2110 dont_join:
2111 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2112 printk(KERN_DEBUG " did not try to join ibss\n");
2113 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2114
2115 /* Selected IBSS not found in current scan results - try to scan */
2116 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
2117 !ieee80211_sta_active_ibss(sdata)) {
2118 mod_timer(&ifsta->timer, jiffies +
2119 IEEE80211_IBSS_MERGE_INTERVAL);
2120 } else if (time_after(jiffies, local->last_scan_completed +
2121 IEEE80211_SCAN_INTERVAL)) {
2122 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
2123 "join\n", sdata->dev->name);
2124 return ieee80211_request_scan(sdata, ifsta->ssid,
2125 ifsta->ssid_len);
2126 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
2127 int interval = IEEE80211_SCAN_INTERVAL;
2128
2129 if (time_after(jiffies, ifsta->ibss_join_req +
2130 IEEE80211_IBSS_JOIN_TIMEOUT)) {
2131 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
2132 (!(local->oper_channel->flags &
2133 IEEE80211_CHAN_NO_IBSS)))
2134 return ieee80211_sta_create_ibss(sdata, ifsta);
2135 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
2136 printk(KERN_DEBUG "%s: IBSS not allowed on"
2137 " %d MHz\n", sdata->dev->name,
2138 local->hw.conf.channel->center_freq);
2139 }
2140
2141 /* No IBSS found - decrease scan interval and continue
2142 * scanning. */
2143 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2144 }
2145
2146 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2147 mod_timer(&ifsta->timer, jiffies + interval);
2148 return 0;
2149 }
2150
2151 return 0;
2152 }
2153
2154
2155 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
2156 struct ieee80211_if_sta *ifsta)
2157 {
2158 struct ieee80211_local *local = sdata->local;
2159 struct ieee80211_bss *bss, *selected = NULL;
2160 int top_rssi = 0, freq;
2161
2162 spin_lock_bh(&local->bss_lock);
2163 freq = local->oper_channel->center_freq;
2164 list_for_each_entry(bss, &local->bss_list, list) {
2165 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2166 continue;
2167
2168 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2169 IEEE80211_STA_AUTO_BSSID_SEL |
2170 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
2171 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2172 !!sdata->default_key))
2173 continue;
2174
2175 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2176 bss->freq != freq)
2177 continue;
2178
2179 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2180 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2181 continue;
2182
2183 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2184 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2185 continue;
2186
2187 if (!selected || top_rssi < bss->signal) {
2188 selected = bss;
2189 top_rssi = bss->signal;
2190 }
2191 }
2192 if (selected)
2193 atomic_inc(&selected->users);
2194 spin_unlock_bh(&local->bss_lock);
2195
2196 if (selected) {
2197 ieee80211_set_freq(sdata, selected->freq);
2198 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2199 ieee80211_sta_set_ssid(sdata, selected->ssid,
2200 selected->ssid_len);
2201 ieee80211_sta_set_bssid(sdata, selected->bssid);
2202 ieee80211_sta_def_wmm_params(sdata, selected);
2203
2204 /* Send out direct probe if no probe resp was received or
2205 * the one we have is outdated
2206 */
2207 if (!selected->last_probe_resp ||
2208 time_after(jiffies, selected->last_probe_resp
2209 + IEEE80211_SCAN_RESULT_EXPIRE))
2210 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2211 else
2212 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2213
2214 ieee80211_rx_bss_put(local, selected);
2215 ieee80211_sta_reset_auth(sdata, ifsta);
2216 return 0;
2217 } else {
2218 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2219 ifsta->assoc_scan_tries++;
2220 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
2221 ieee80211_start_scan(sdata, NULL, 0);
2222 else
2223 ieee80211_start_scan(sdata, ifsta->ssid,
2224 ifsta->ssid_len);
2225 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2226 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2227 } else
2228 ifsta->state = IEEE80211_STA_MLME_DISABLED;
2229 }
2230 return -1;
2231 }
2232
2233
2234 static void ieee80211_sta_work(struct work_struct *work)
2235 {
2236 struct ieee80211_sub_if_data *sdata =
2237 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2238 struct ieee80211_local *local = sdata->local;
2239 struct ieee80211_if_sta *ifsta;
2240 struct sk_buff *skb;
2241
2242 if (!netif_running(sdata->dev))
2243 return;
2244
2245 if (local->sw_scanning || local->hw_scanning)
2246 return;
2247
2248 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION &&
2249 sdata->vif.type != NL80211_IFTYPE_ADHOC))
2250 return;
2251 ifsta = &sdata->u.sta;
2252
2253 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2254 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2255
2256 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2257 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2258 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
2259 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
2260 ieee80211_start_scan(sdata, ifsta->scan_ssid,
2261 ifsta->scan_ssid_len);
2262 return;
2263 }
2264
2265 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2266 if (ieee80211_sta_config_auth(sdata, ifsta))
2267 return;
2268 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2269 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2270 return;
2271
2272 switch (ifsta->state) {
2273 case IEEE80211_STA_MLME_DISABLED:
2274 break;
2275 case IEEE80211_STA_MLME_DIRECT_PROBE:
2276 ieee80211_direct_probe(sdata, ifsta);
2277 break;
2278 case IEEE80211_STA_MLME_AUTHENTICATE:
2279 ieee80211_authenticate(sdata, ifsta);
2280 break;
2281 case IEEE80211_STA_MLME_ASSOCIATE:
2282 ieee80211_associate(sdata, ifsta);
2283 break;
2284 case IEEE80211_STA_MLME_ASSOCIATED:
2285 ieee80211_associated(sdata, ifsta);
2286 break;
2287 case IEEE80211_STA_MLME_IBSS_SEARCH:
2288 ieee80211_sta_find_ibss(sdata, ifsta);
2289 break;
2290 case IEEE80211_STA_MLME_IBSS_JOINED:
2291 ieee80211_sta_merge_ibss(sdata, ifsta);
2292 break;
2293 default:
2294 WARN_ON(1);
2295 break;
2296 }
2297
2298 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
2299 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2300 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2301
2302 ieee80211_set_disassoc(sdata, ifsta, false, true,
2303 WLAN_REASON_UNSPECIFIED);
2304 }
2305 }
2306
2307 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2308 {
2309 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2310 queue_work(sdata->local->hw.workqueue,
2311 &sdata->u.sta.work);
2312 }
2313
2314 /* interface setup */
2315 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2316 {
2317 struct ieee80211_if_sta *ifsta;
2318
2319 ifsta = &sdata->u.sta;
2320 INIT_WORK(&ifsta->work, ieee80211_sta_work);
2321 setup_timer(&ifsta->timer, ieee80211_sta_timer,
2322 (unsigned long) sdata);
2323 skb_queue_head_init(&ifsta->skb_queue);
2324
2325 ifsta->capab = WLAN_CAPABILITY_ESS;
2326 ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2327 IEEE80211_AUTH_ALG_SHARED_KEY;
2328 ifsta->flags |= IEEE80211_STA_CREATE_IBSS |
2329 IEEE80211_STA_AUTO_BSSID_SEL |
2330 IEEE80211_STA_AUTO_CHANNEL_SEL;
2331 if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4)
2332 ifsta->flags |= IEEE80211_STA_WMM_ENABLED;
2333 }
2334
2335 /*
2336 * Add a new IBSS station, will also be called by the RX code when,
2337 * in IBSS mode, receiving a frame from a yet-unknown station, hence
2338 * must be callable in atomic context.
2339 */
2340 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
2341 struct sk_buff *skb, u8 *bssid,
2342 u8 *addr, u64 supp_rates)
2343 {
2344 struct ieee80211_local *local = sdata->local;
2345 struct sta_info *sta;
2346 DECLARE_MAC_BUF(mac);
2347 int band = local->hw.conf.channel->band;
2348
2349 /* TODO: Could consider removing the least recently used entry and
2350 * allow new one to be added. */
2351 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
2352 if (net_ratelimit()) {
2353 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
2354 "entry %s\n", sdata->dev->name, print_mac(mac, addr));
2355 }
2356 return NULL;
2357 }
2358
2359 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
2360 return NULL;
2361
2362 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2363 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
2364 wiphy_name(local->hw.wiphy), print_mac(mac, addr), sdata->dev->name);
2365 #endif
2366
2367 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
2368 if (!sta)
2369 return NULL;
2370
2371 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
2372
2373 /* make sure mandatory rates are always added */
2374 sta->sta.supp_rates[band] = supp_rates |
2375 ieee80211_mandatory_rates(local, band);
2376
2377 rate_control_rate_init(sta);
2378
2379 if (sta_info_insert(sta))
2380 return NULL;
2381
2382 return sta;
2383 }
2384
2385 /* configuration hooks */
2386 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
2387 struct ieee80211_if_sta *ifsta)
2388 {
2389 struct ieee80211_local *local = sdata->local;
2390
2391 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2392 return;
2393
2394 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2395 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2396 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2397 IEEE80211_STA_AUTO_SSID_SEL))) {
2398
2399 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED)
2400 ieee80211_set_disassoc(sdata, ifsta, true, true,
2401 WLAN_REASON_DEAUTH_LEAVING);
2402
2403 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2404 queue_work(local->hw.workqueue, &ifsta->work);
2405 }
2406 }
2407
2408 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2409 {
2410 struct ieee80211_if_sta *ifsta;
2411 int res;
2412
2413 if (len > IEEE80211_MAX_SSID_LEN)
2414 return -EINVAL;
2415
2416 ifsta = &sdata->u.sta;
2417
2418 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
2419 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
2420 memcpy(ifsta->ssid, ssid, len);
2421 ifsta->ssid_len = len;
2422 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2423
2424 res = 0;
2425 /*
2426 * Hack! MLME code needs to be cleaned up to have different
2427 * entry points for configuration and internal selection change
2428 */
2429 if (netif_running(sdata->dev))
2430 res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID);
2431 if (res) {
2432 printk(KERN_DEBUG "%s: Failed to config new SSID to "
2433 "the low-level driver\n", sdata->dev->name);
2434 return res;
2435 }
2436 }
2437
2438 if (len)
2439 ifsta->flags |= IEEE80211_STA_SSID_SET;
2440 else
2441 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
2442
2443 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
2444 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
2445 ifsta->ibss_join_req = jiffies;
2446 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2447 return ieee80211_sta_find_ibss(sdata, ifsta);
2448 }
2449
2450 return 0;
2451 }
2452
2453 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2454 {
2455 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2456 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2457 *len = ifsta->ssid_len;
2458 return 0;
2459 }
2460
2461 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2462 {
2463 struct ieee80211_if_sta *ifsta;
2464 int res;
2465
2466 ifsta = &sdata->u.sta;
2467
2468 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2469 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2470 res = 0;
2471 /*
2472 * Hack! See also ieee80211_sta_set_ssid.
2473 */
2474 if (netif_running(sdata->dev))
2475 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
2476 if (res) {
2477 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2478 "the low-level driver\n", sdata->dev->name);
2479 return res;
2480 }
2481 }
2482
2483 if (is_valid_ether_addr(bssid))
2484 ifsta->flags |= IEEE80211_STA_BSSID_SET;
2485 else
2486 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
2487
2488 return 0;
2489 }
2490
2491 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
2492 {
2493 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2494
2495 kfree(ifsta->extra_ie);
2496 if (len == 0) {
2497 ifsta->extra_ie = NULL;
2498 ifsta->extra_ie_len = 0;
2499 return 0;
2500 }
2501 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
2502 if (!ifsta->extra_ie) {
2503 ifsta->extra_ie_len = 0;
2504 return -ENOMEM;
2505 }
2506 memcpy(ifsta->extra_ie, ie, len);
2507 ifsta->extra_ie_len = len;
2508 return 0;
2509 }
2510
2511 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2512 {
2513 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2514
2515 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2516 sdata->dev->name, reason);
2517
2518 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
2519 sdata->vif.type != NL80211_IFTYPE_ADHOC)
2520 return -EINVAL;
2521
2522 ieee80211_set_disassoc(sdata, ifsta, true, true, reason);
2523 return 0;
2524 }
2525
2526 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2527 {
2528 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2529
2530 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2531 sdata->dev->name, reason);
2532
2533 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2534 return -EINVAL;
2535
2536 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
2537 return -1;
2538
2539 ieee80211_set_disassoc(sdata, ifsta, false, true, reason);
2540 return 0;
2541 }
2542
2543 /* scan finished notification */
2544 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2545 {
2546 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2547 struct ieee80211_if_sta *ifsta;
2548
2549 if (sdata && sdata->vif.type == NL80211_IFTYPE_ADHOC) {
2550 ifsta = &sdata->u.sta;
2551 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
2552 (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) &&
2553 !ieee80211_sta_active_ibss(sdata)))
2554 ieee80211_sta_find_ibss(sdata, ifsta);
2555 }
2556
2557 /* Restart STA timers */
2558 rcu_read_lock();
2559 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2560 ieee80211_restart_sta_timer(sdata);
2561 rcu_read_unlock();
2562 }
2563
2564 /* driver notification call */
2565 void ieee80211_notify_mac(struct ieee80211_hw *hw,
2566 enum ieee80211_notification_types notif_type)
2567 {
2568 struct ieee80211_local *local = hw_to_local(hw);
2569 struct ieee80211_sub_if_data *sdata;
2570
2571 switch (notif_type) {
2572 case IEEE80211_NOTIFY_RE_ASSOC:
2573 rtnl_lock();
2574 list_for_each_entry(sdata, &local->interfaces, list) {
2575 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2576 continue;
2577
2578 ieee80211_sta_req_auth(sdata, &sdata->u.sta);
2579 }
2580 rtnl_unlock();
2581 break;
2582 }
2583 }
2584 EXPORT_SYMBOL(ieee80211_notify_mac);
SocketAccessConTroL development