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x86: lapic address print out like io apic addr
[deliverable/linux.git] / net / mac80211 / mlme.c
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 (struct ieee80211_ht_cap *)
1352 elems.ht_cap_elem, &sta->sta.ht_info);
1353 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1354 (struct ieee80211_ht_addt_info *)
1355 elems.ht_info_elem, &bss_info);
1356 ieee80211_handle_ht(local, 1, &sta->sta.ht_info, &bss_info);
1357 }
1358
1359 rate_control_rate_init(sta);
1360
1361 if (elems.wmm_param) {
1362 set_sta_flags(sta, WLAN_STA_WME);
1363 rcu_read_unlock();
1364 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1365 elems.wmm_param_len);
1366 } else
1367 rcu_read_unlock();
1368
1369 /* set AID and assoc capability,
1370 * ieee80211_set_associated() will tell the driver */
1371 bss_conf->aid = aid;
1372 bss_conf->assoc_capability = capab_info;
1373 ieee80211_set_associated(sdata, ifsta);
1374
1375 ieee80211_associated(sdata, ifsta);
1376 }
1377
1378
1379 static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
1380 struct ieee80211_if_sta *ifsta,
1381 struct ieee80211_bss *bss)
1382 {
1383 struct ieee80211_local *local = sdata->local;
1384 int res, rates, i, j;
1385 struct sk_buff *skb;
1386 struct ieee80211_mgmt *mgmt;
1387 u8 *pos;
1388 struct ieee80211_supported_band *sband;
1389 union iwreq_data wrqu;
1390
1391 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1392
1393 /* Remove possible STA entries from other IBSS networks. */
1394 sta_info_flush_delayed(sdata);
1395
1396 if (local->ops->reset_tsf) {
1397 /* Reset own TSF to allow time synchronization work. */
1398 local->ops->reset_tsf(local_to_hw(local));
1399 }
1400 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
1401 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
1402 if (res)
1403 return res;
1404
1405 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
1406
1407 sdata->drop_unencrypted = bss->capability &
1408 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
1409
1410 res = ieee80211_set_freq(sdata, bss->freq);
1411
1412 if (res)
1413 return res;
1414
1415 /* Build IBSS probe response */
1416 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
1417 if (skb) {
1418 skb_reserve(skb, local->hw.extra_tx_headroom);
1419
1420 mgmt = (struct ieee80211_mgmt *)
1421 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
1422 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
1423 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1424 IEEE80211_STYPE_PROBE_RESP);
1425 memset(mgmt->da, 0xff, ETH_ALEN);
1426 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1427 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1428 mgmt->u.beacon.beacon_int =
1429 cpu_to_le16(local->hw.conf.beacon_int);
1430 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
1431 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
1432
1433 pos = skb_put(skb, 2 + ifsta->ssid_len);
1434 *pos++ = WLAN_EID_SSID;
1435 *pos++ = ifsta->ssid_len;
1436 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
1437
1438 rates = bss->supp_rates_len;
1439 if (rates > 8)
1440 rates = 8;
1441 pos = skb_put(skb, 2 + rates);
1442 *pos++ = WLAN_EID_SUPP_RATES;
1443 *pos++ = rates;
1444 memcpy(pos, bss->supp_rates, rates);
1445
1446 if (bss->band == IEEE80211_BAND_2GHZ) {
1447 pos = skb_put(skb, 2 + 1);
1448 *pos++ = WLAN_EID_DS_PARAMS;
1449 *pos++ = 1;
1450 *pos++ = ieee80211_frequency_to_channel(bss->freq);
1451 }
1452
1453 pos = skb_put(skb, 2 + 2);
1454 *pos++ = WLAN_EID_IBSS_PARAMS;
1455 *pos++ = 2;
1456 /* FIX: set ATIM window based on scan results */
1457 *pos++ = 0;
1458 *pos++ = 0;
1459
1460 if (bss->supp_rates_len > 8) {
1461 rates = bss->supp_rates_len - 8;
1462 pos = skb_put(skb, 2 + rates);
1463 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1464 *pos++ = rates;
1465 memcpy(pos, &bss->supp_rates[8], rates);
1466 }
1467
1468 ifsta->probe_resp = skb;
1469
1470 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
1471 }
1472
1473 rates = 0;
1474 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1475 for (i = 0; i < bss->supp_rates_len; i++) {
1476 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
1477 for (j = 0; j < sband->n_bitrates; j++)
1478 if (sband->bitrates[j].bitrate == bitrate)
1479 rates |= BIT(j);
1480 }
1481 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
1482
1483 ieee80211_sta_def_wmm_params(sdata, bss);
1484
1485 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
1486 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1487
1488 ieee80211_led_assoc(local, true);
1489
1490 memset(&wrqu, 0, sizeof(wrqu));
1491 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
1492 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
1493
1494 return res;
1495 }
1496
1497 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1498 struct ieee80211_mgmt *mgmt,
1499 size_t len,
1500 struct ieee80211_rx_status *rx_status,
1501 struct ieee802_11_elems *elems,
1502 bool beacon)
1503 {
1504 struct ieee80211_local *local = sdata->local;
1505 int freq;
1506 struct ieee80211_bss *bss;
1507 struct sta_info *sta;
1508 struct ieee80211_channel *channel;
1509 u64 beacon_timestamp, rx_timestamp;
1510 u64 supp_rates = 0;
1511 enum ieee80211_band band = rx_status->band;
1512 DECLARE_MAC_BUF(mac);
1513 DECLARE_MAC_BUF(mac2);
1514
1515 if (elems->ds_params && elems->ds_params_len == 1)
1516 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1517 else
1518 freq = rx_status->freq;
1519
1520 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1521
1522 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1523 return;
1524
1525 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && elems->supp_rates &&
1526 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1527 supp_rates = ieee80211_sta_get_rates(local, elems, band);
1528
1529 rcu_read_lock();
1530
1531 sta = sta_info_get(local, mgmt->sa);
1532 if (sta) {
1533 u64 prev_rates;
1534
1535 prev_rates = sta->sta.supp_rates[band];
1536 /* make sure mandatory rates are always added */
1537 sta->sta.supp_rates[band] = supp_rates |
1538 ieee80211_mandatory_rates(local, band);
1539
1540 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1541 if (sta->sta.supp_rates[band] != prev_rates)
1542 printk(KERN_DEBUG "%s: updated supp_rates set "
1543 "for %s based on beacon info (0x%llx | "
1544 "0x%llx -> 0x%llx)\n",
1545 sdata->dev->name,
1546 print_mac(mac, sta->sta.addr),
1547 (unsigned long long) prev_rates,
1548 (unsigned long long) supp_rates,
1549 (unsigned long long) sta->sta.supp_rates[band]);
1550 #endif
1551 } else {
1552 ieee80211_ibss_add_sta(sdata, NULL, mgmt->bssid,
1553 mgmt->sa, supp_rates);
1554 }
1555
1556 rcu_read_unlock();
1557 }
1558
1559 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1560 freq, beacon);
1561 if (!bss)
1562 return;
1563
1564 /* was just updated in ieee80211_bss_info_update */
1565 beacon_timestamp = bss->timestamp;
1566
1567 /*
1568 * In STA mode, the remaining parameters should not be overridden
1569 * by beacons because they're not necessarily accurate there.
1570 */
1571 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
1572 bss->last_probe_resp && beacon) {
1573 ieee80211_rx_bss_put(local, bss);
1574 return;
1575 }
1576
1577 /* check if we need to merge IBSS */
1578 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && beacon &&
1579 bss->capability & WLAN_CAPABILITY_IBSS &&
1580 bss->freq == local->oper_channel->center_freq &&
1581 elems->ssid_len == sdata->u.sta.ssid_len &&
1582 memcmp(elems->ssid, sdata->u.sta.ssid,
1583 sdata->u.sta.ssid_len) == 0) {
1584 if (rx_status->flag & RX_FLAG_TSFT) {
1585 /* in order for correct IBSS merging we need mactime
1586 *
1587 * since mactime is defined as the time the first data
1588 * symbol of the frame hits the PHY, and the timestamp
1589 * of the beacon is defined as "the time that the data
1590 * symbol containing the first bit of the timestamp is
1591 * transmitted to the PHY plus the transmitting STA’s
1592 * delays through its local PHY from the MAC-PHY
1593 * interface to its interface with the WM"
1594 * (802.11 11.1.2) - equals the time this bit arrives at
1595 * the receiver - we have to take into account the
1596 * offset between the two.
1597 * e.g: at 1 MBit that means mactime is 192 usec earlier
1598 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
1599 */
1600 int rate = local->hw.wiphy->bands[band]->
1601 bitrates[rx_status->rate_idx].bitrate;
1602 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
1603 } else if (local && local->ops && local->ops->get_tsf)
1604 /* second best option: get current TSF */
1605 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
1606 else
1607 /* can't merge without knowing the TSF */
1608 rx_timestamp = -1LLU;
1609 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1610 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
1611 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
1612 print_mac(mac, mgmt->sa),
1613 print_mac(mac2, mgmt->bssid),
1614 (unsigned long long)rx_timestamp,
1615 (unsigned long long)beacon_timestamp,
1616 (unsigned long long)(rx_timestamp - beacon_timestamp),
1617 jiffies);
1618 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1619 if (beacon_timestamp > rx_timestamp) {
1620 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1621 printk(KERN_DEBUG "%s: beacon TSF higher than "
1622 "local TSF - IBSS merge with BSSID %s\n",
1623 sdata->dev->name, print_mac(mac, mgmt->bssid));
1624 #endif
1625 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
1626 ieee80211_ibss_add_sta(sdata, NULL,
1627 mgmt->bssid, mgmt->sa,
1628 supp_rates);
1629 }
1630 }
1631
1632 ieee80211_rx_bss_put(local, bss);
1633 }
1634
1635
1636 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1637 struct ieee80211_mgmt *mgmt,
1638 size_t len,
1639 struct ieee80211_rx_status *rx_status)
1640 {
1641 size_t baselen;
1642 struct ieee802_11_elems elems;
1643 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1644
1645 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1646 return; /* ignore ProbeResp to foreign address */
1647
1648 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1649 if (baselen > len)
1650 return;
1651
1652 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1653 &elems);
1654
1655 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1656
1657 /* direct probe may be part of the association flow */
1658 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1659 &ifsta->request)) {
1660 printk(KERN_DEBUG "%s direct probe responded\n",
1661 sdata->dev->name);
1662 ieee80211_authenticate(sdata, ifsta);
1663 }
1664 }
1665
1666
1667 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1668 struct ieee80211_mgmt *mgmt,
1669 size_t len,
1670 struct ieee80211_rx_status *rx_status)
1671 {
1672 struct ieee80211_if_sta *ifsta;
1673 size_t baselen;
1674 struct ieee802_11_elems elems;
1675 struct ieee80211_local *local = sdata->local;
1676 struct ieee80211_conf *conf = &local->hw.conf;
1677 u32 changed = 0;
1678
1679 /* Process beacon from the current BSS */
1680 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1681 if (baselen > len)
1682 return;
1683
1684 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1685
1686 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
1687
1688 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1689 return;
1690 ifsta = &sdata->u.sta;
1691
1692 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
1693 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1694 return;
1695
1696 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1697 elems.wmm_param_len);
1698
1699 if (elems.erp_info && elems.erp_info_len >= 1)
1700 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
1701 else {
1702 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
1703 changed |= ieee80211_handle_protect_preamb(sdata, false,
1704 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
1705 }
1706
1707 if (elems.ht_cap_elem && elems.ht_info_elem &&
1708 elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
1709 struct ieee80211_ht_bss_info bss_info;
1710
1711 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1712 (struct ieee80211_ht_addt_info *)
1713 elems.ht_info_elem, &bss_info);
1714 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
1715 &bss_info);
1716 }
1717
1718 ieee80211_bss_info_change_notify(sdata, changed);
1719 }
1720
1721
1722 static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
1723 struct ieee80211_if_sta *ifsta,
1724 struct ieee80211_mgmt *mgmt,
1725 size_t len,
1726 struct ieee80211_rx_status *rx_status)
1727 {
1728 struct ieee80211_local *local = sdata->local;
1729 int tx_last_beacon;
1730 struct sk_buff *skb;
1731 struct ieee80211_mgmt *resp;
1732 u8 *pos, *end;
1733 DECLARE_MAC_BUF(mac);
1734 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1735 DECLARE_MAC_BUF(mac2);
1736 DECLARE_MAC_BUF(mac3);
1737 #endif
1738
1739 if (sdata->vif.type != NL80211_IFTYPE_ADHOC ||
1740 ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
1741 len < 24 + 2 || !ifsta->probe_resp)
1742 return;
1743
1744 if (local->ops->tx_last_beacon)
1745 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1746 else
1747 tx_last_beacon = 1;
1748
1749 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1750 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
1751 "%s (tx_last_beacon=%d)\n",
1752 sdata->dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
1753 print_mac(mac3, mgmt->bssid), tx_last_beacon);
1754 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1755
1756 if (!tx_last_beacon)
1757 return;
1758
1759 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1760 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1761 return;
1762
1763 end = ((u8 *) mgmt) + len;
1764 pos = mgmt->u.probe_req.variable;
1765 if (pos[0] != WLAN_EID_SSID ||
1766 pos + 2 + pos[1] > end) {
1767 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1768 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
1769 "from %s\n",
1770 sdata->dev->name, print_mac(mac, mgmt->sa));
1771 #endif
1772 return;
1773 }
1774 if (pos[1] != 0 &&
1775 (pos[1] != ifsta->ssid_len ||
1776 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1777 /* Ignore ProbeReq for foreign SSID */
1778 return;
1779 }
1780
1781 /* Reply with ProbeResp */
1782 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
1783 if (!skb)
1784 return;
1785
1786 resp = (struct ieee80211_mgmt *) skb->data;
1787 memcpy(resp->da, mgmt->sa, ETH_ALEN);
1788 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1789 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
1790 sdata->dev->name, print_mac(mac, resp->da));
1791 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1792 ieee80211_tx_skb(sdata, skb, 0);
1793 }
1794
1795 void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
1796 struct ieee80211_rx_status *rx_status)
1797 {
1798 struct ieee80211_local *local = sdata->local;
1799 struct ieee80211_if_sta *ifsta;
1800 struct ieee80211_mgmt *mgmt;
1801 u16 fc;
1802
1803 if (skb->len < 24)
1804 goto fail;
1805
1806 ifsta = &sdata->u.sta;
1807
1808 mgmt = (struct ieee80211_mgmt *) skb->data;
1809 fc = le16_to_cpu(mgmt->frame_control);
1810
1811 switch (fc & IEEE80211_FCTL_STYPE) {
1812 case IEEE80211_STYPE_PROBE_REQ:
1813 case IEEE80211_STYPE_PROBE_RESP:
1814 case IEEE80211_STYPE_BEACON:
1815 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1816 case IEEE80211_STYPE_AUTH:
1817 case IEEE80211_STYPE_ASSOC_RESP:
1818 case IEEE80211_STYPE_REASSOC_RESP:
1819 case IEEE80211_STYPE_DEAUTH:
1820 case IEEE80211_STYPE_DISASSOC:
1821 skb_queue_tail(&ifsta->skb_queue, skb);
1822 queue_work(local->hw.workqueue, &ifsta->work);
1823 return;
1824 }
1825
1826 fail:
1827 kfree_skb(skb);
1828 }
1829
1830 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1831 struct sk_buff *skb)
1832 {
1833 struct ieee80211_rx_status *rx_status;
1834 struct ieee80211_if_sta *ifsta;
1835 struct ieee80211_mgmt *mgmt;
1836 u16 fc;
1837
1838 ifsta = &sdata->u.sta;
1839
1840 rx_status = (struct ieee80211_rx_status *) skb->cb;
1841 mgmt = (struct ieee80211_mgmt *) skb->data;
1842 fc = le16_to_cpu(mgmt->frame_control);
1843
1844 switch (fc & IEEE80211_FCTL_STYPE) {
1845 case IEEE80211_STYPE_PROBE_REQ:
1846 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len,
1847 rx_status);
1848 break;
1849 case IEEE80211_STYPE_PROBE_RESP:
1850 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
1851 break;
1852 case IEEE80211_STYPE_BEACON:
1853 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
1854 break;
1855 case IEEE80211_STYPE_AUTH:
1856 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
1857 break;
1858 case IEEE80211_STYPE_ASSOC_RESP:
1859 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
1860 break;
1861 case IEEE80211_STYPE_REASSOC_RESP:
1862 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
1863 break;
1864 case IEEE80211_STYPE_DEAUTH:
1865 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
1866 break;
1867 case IEEE80211_STYPE_DISASSOC:
1868 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
1869 break;
1870 }
1871
1872 kfree_skb(skb);
1873 }
1874
1875
1876 static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
1877 {
1878 struct ieee80211_local *local = sdata->local;
1879 int active = 0;
1880 struct sta_info *sta;
1881
1882 rcu_read_lock();
1883
1884 list_for_each_entry_rcu(sta, &local->sta_list, list) {
1885 if (sta->sdata == sdata &&
1886 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
1887 jiffies)) {
1888 active++;
1889 break;
1890 }
1891 }
1892
1893 rcu_read_unlock();
1894
1895 return active;
1896 }
1897
1898
1899 static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
1900 struct ieee80211_if_sta *ifsta)
1901 {
1902 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1903
1904 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
1905 if (ieee80211_sta_active_ibss(sdata))
1906 return;
1907
1908 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
1909 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
1910 ieee80211_request_scan(sdata, ifsta->ssid, ifsta->ssid_len);
1911 }
1912
1913
1914 static void ieee80211_sta_timer(unsigned long data)
1915 {
1916 struct ieee80211_sub_if_data *sdata =
1917 (struct ieee80211_sub_if_data *) data;
1918 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1919 struct ieee80211_local *local = sdata->local;
1920
1921 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1922 queue_work(local->hw.workqueue, &ifsta->work);
1923 }
1924
1925 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
1926 struct ieee80211_if_sta *ifsta)
1927 {
1928 struct ieee80211_local *local = sdata->local;
1929
1930 if (local->ops->reset_tsf) {
1931 /* Reset own TSF to allow time synchronization work. */
1932 local->ops->reset_tsf(local_to_hw(local));
1933 }
1934
1935 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
1936
1937
1938 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1939 ifsta->auth_alg = WLAN_AUTH_OPEN;
1940 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1941 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
1942 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1943 ifsta->auth_alg = WLAN_AUTH_LEAP;
1944 else
1945 ifsta->auth_alg = WLAN_AUTH_OPEN;
1946 ifsta->auth_transaction = -1;
1947 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
1948 ifsta->assoc_scan_tries = 0;
1949 ifsta->direct_probe_tries = 0;
1950 ifsta->auth_tries = 0;
1951 ifsta->assoc_tries = 0;
1952 netif_tx_stop_all_queues(sdata->dev);
1953 netif_carrier_off(sdata->dev);
1954 }
1955
1956
1957 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
1958 const char *ssid, int ssid_len)
1959 {
1960 int tmp, hidden_ssid;
1961
1962 if (ssid_len == ifsta->ssid_len &&
1963 !memcmp(ifsta->ssid, ssid, ssid_len))
1964 return 1;
1965
1966 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
1967 return 0;
1968
1969 hidden_ssid = 1;
1970 tmp = ssid_len;
1971 while (tmp--) {
1972 if (ssid[tmp] != '\0') {
1973 hidden_ssid = 0;
1974 break;
1975 }
1976 }
1977
1978 if (hidden_ssid && ifsta->ssid_len == ssid_len)
1979 return 1;
1980
1981 if (ssid_len == 1 && ssid[0] == ' ')
1982 return 1;
1983
1984 return 0;
1985 }
1986
1987 static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
1988 struct ieee80211_if_sta *ifsta)
1989 {
1990 struct ieee80211_local *local = sdata->local;
1991 struct ieee80211_bss *bss;
1992 struct ieee80211_supported_band *sband;
1993 u8 bssid[ETH_ALEN], *pos;
1994 int i;
1995 int ret;
1996 DECLARE_MAC_BUF(mac);
1997
1998 #if 0
1999 /* Easier testing, use fixed BSSID. */
2000 memset(bssid, 0xfe, ETH_ALEN);
2001 #else
2002 /* Generate random, not broadcast, locally administered BSSID. Mix in
2003 * own MAC address to make sure that devices that do not have proper
2004 * random number generator get different BSSID. */
2005 get_random_bytes(bssid, ETH_ALEN);
2006 for (i = 0; i < ETH_ALEN; i++)
2007 bssid[i] ^= sdata->dev->dev_addr[i];
2008 bssid[0] &= ~0x01;
2009 bssid[0] |= 0x02;
2010 #endif
2011
2012 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
2013 sdata->dev->name, print_mac(mac, bssid));
2014
2015 bss = ieee80211_rx_bss_add(local, bssid,
2016 local->hw.conf.channel->center_freq,
2017 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
2018 if (!bss)
2019 return -ENOMEM;
2020
2021 bss->band = local->hw.conf.channel->band;
2022 sband = local->hw.wiphy->bands[bss->band];
2023
2024 if (local->hw.conf.beacon_int == 0)
2025 local->hw.conf.beacon_int = 100;
2026 bss->beacon_int = local->hw.conf.beacon_int;
2027 bss->last_update = jiffies;
2028 bss->capability = WLAN_CAPABILITY_IBSS;
2029
2030 if (sdata->default_key)
2031 bss->capability |= WLAN_CAPABILITY_PRIVACY;
2032 else
2033 sdata->drop_unencrypted = 0;
2034
2035 bss->supp_rates_len = sband->n_bitrates;
2036 pos = bss->supp_rates;
2037 for (i = 0; i < sband->n_bitrates; i++) {
2038 int rate = sband->bitrates[i].bitrate;
2039 *pos++ = (u8) (rate / 5);
2040 }
2041
2042 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
2043 ieee80211_rx_bss_put(local, bss);
2044 return ret;
2045 }
2046
2047
2048 static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
2049 struct ieee80211_if_sta *ifsta)
2050 {
2051 struct ieee80211_local *local = sdata->local;
2052 struct ieee80211_bss *bss;
2053 int found = 0;
2054 u8 bssid[ETH_ALEN];
2055 int active_ibss;
2056 DECLARE_MAC_BUF(mac);
2057 DECLARE_MAC_BUF(mac2);
2058
2059 if (ifsta->ssid_len == 0)
2060 return -EINVAL;
2061
2062 active_ibss = ieee80211_sta_active_ibss(sdata);
2063 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2064 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2065 sdata->dev->name, active_ibss);
2066 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2067 spin_lock_bh(&local->bss_lock);
2068 list_for_each_entry(bss, &local->bss_list, list) {
2069 if (ifsta->ssid_len != bss->ssid_len ||
2070 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2071 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2072 continue;
2073 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2074 printk(KERN_DEBUG " bssid=%s found\n",
2075 print_mac(mac, bss->bssid));
2076 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2077 memcpy(bssid, bss->bssid, ETH_ALEN);
2078 found = 1;
2079 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2080 break;
2081 }
2082 spin_unlock_bh(&local->bss_lock);
2083
2084 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2085 if (found)
2086 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
2087 "%s\n", print_mac(mac, bssid),
2088 print_mac(mac2, ifsta->bssid));
2089 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2090
2091 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2092 int ret;
2093 int search_freq;
2094
2095 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2096 search_freq = bss->freq;
2097 else
2098 search_freq = local->hw.conf.channel->center_freq;
2099
2100 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
2101 ifsta->ssid, ifsta->ssid_len);
2102 if (!bss)
2103 goto dont_join;
2104
2105 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
2106 " based on configured SSID\n",
2107 sdata->dev->name, print_mac(mac, bssid));
2108 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
2109 ieee80211_rx_bss_put(local, bss);
2110 return ret;
2111 }
2112
2113 dont_join:
2114 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2115 printk(KERN_DEBUG " did not try to join ibss\n");
2116 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2117
2118 /* Selected IBSS not found in current scan results - try to scan */
2119 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
2120 !ieee80211_sta_active_ibss(sdata)) {
2121 mod_timer(&ifsta->timer, jiffies +
2122 IEEE80211_IBSS_MERGE_INTERVAL);
2123 } else if (time_after(jiffies, local->last_scan_completed +
2124 IEEE80211_SCAN_INTERVAL)) {
2125 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
2126 "join\n", sdata->dev->name);
2127 return ieee80211_request_scan(sdata, ifsta->ssid,
2128 ifsta->ssid_len);
2129 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
2130 int interval = IEEE80211_SCAN_INTERVAL;
2131
2132 if (time_after(jiffies, ifsta->ibss_join_req +
2133 IEEE80211_IBSS_JOIN_TIMEOUT)) {
2134 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
2135 (!(local->oper_channel->flags &
2136 IEEE80211_CHAN_NO_IBSS)))
2137 return ieee80211_sta_create_ibss(sdata, ifsta);
2138 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
2139 printk(KERN_DEBUG "%s: IBSS not allowed on"
2140 " %d MHz\n", sdata->dev->name,
2141 local->hw.conf.channel->center_freq);
2142 }
2143
2144 /* No IBSS found - decrease scan interval and continue
2145 * scanning. */
2146 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2147 }
2148
2149 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2150 mod_timer(&ifsta->timer, jiffies + interval);
2151 return 0;
2152 }
2153
2154 return 0;
2155 }
2156
2157
2158 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
2159 struct ieee80211_if_sta *ifsta)
2160 {
2161 struct ieee80211_local *local = sdata->local;
2162 struct ieee80211_bss *bss, *selected = NULL;
2163 int top_rssi = 0, freq;
2164
2165 spin_lock_bh(&local->bss_lock);
2166 freq = local->oper_channel->center_freq;
2167 list_for_each_entry(bss, &local->bss_list, list) {
2168 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2169 continue;
2170
2171 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2172 IEEE80211_STA_AUTO_BSSID_SEL |
2173 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
2174 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2175 !!sdata->default_key))
2176 continue;
2177
2178 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2179 bss->freq != freq)
2180 continue;
2181
2182 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2183 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2184 continue;
2185
2186 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2187 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2188 continue;
2189
2190 if (!selected || top_rssi < bss->signal) {
2191 selected = bss;
2192 top_rssi = bss->signal;
2193 }
2194 }
2195 if (selected)
2196 atomic_inc(&selected->users);
2197 spin_unlock_bh(&local->bss_lock);
2198
2199 if (selected) {
2200 ieee80211_set_freq(sdata, selected->freq);
2201 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2202 ieee80211_sta_set_ssid(sdata, selected->ssid,
2203 selected->ssid_len);
2204 ieee80211_sta_set_bssid(sdata, selected->bssid);
2205 ieee80211_sta_def_wmm_params(sdata, selected);
2206
2207 /* Send out direct probe if no probe resp was received or
2208 * the one we have is outdated
2209 */
2210 if (!selected->last_probe_resp ||
2211 time_after(jiffies, selected->last_probe_resp
2212 + IEEE80211_SCAN_RESULT_EXPIRE))
2213 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2214 else
2215 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2216
2217 ieee80211_rx_bss_put(local, selected);
2218 ieee80211_sta_reset_auth(sdata, ifsta);
2219 return 0;
2220 } else {
2221 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2222 ifsta->assoc_scan_tries++;
2223 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
2224 ieee80211_start_scan(sdata, NULL, 0);
2225 else
2226 ieee80211_start_scan(sdata, ifsta->ssid,
2227 ifsta->ssid_len);
2228 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2229 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2230 } else
2231 ifsta->state = IEEE80211_STA_MLME_DISABLED;
2232 }
2233 return -1;
2234 }
2235
2236
2237 static void ieee80211_sta_work(struct work_struct *work)
2238 {
2239 struct ieee80211_sub_if_data *sdata =
2240 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2241 struct ieee80211_local *local = sdata->local;
2242 struct ieee80211_if_sta *ifsta;
2243 struct sk_buff *skb;
2244
2245 if (!netif_running(sdata->dev))
2246 return;
2247
2248 if (local->sw_scanning || local->hw_scanning)
2249 return;
2250
2251 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION &&
2252 sdata->vif.type != NL80211_IFTYPE_ADHOC))
2253 return;
2254 ifsta = &sdata->u.sta;
2255
2256 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2257 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2258
2259 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2260 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2261 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
2262 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
2263 ieee80211_start_scan(sdata, ifsta->scan_ssid,
2264 ifsta->scan_ssid_len);
2265 return;
2266 }
2267
2268 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2269 if (ieee80211_sta_config_auth(sdata, ifsta))
2270 return;
2271 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2272 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2273 return;
2274
2275 switch (ifsta->state) {
2276 case IEEE80211_STA_MLME_DISABLED:
2277 break;
2278 case IEEE80211_STA_MLME_DIRECT_PROBE:
2279 ieee80211_direct_probe(sdata, ifsta);
2280 break;
2281 case IEEE80211_STA_MLME_AUTHENTICATE:
2282 ieee80211_authenticate(sdata, ifsta);
2283 break;
2284 case IEEE80211_STA_MLME_ASSOCIATE:
2285 ieee80211_associate(sdata, ifsta);
2286 break;
2287 case IEEE80211_STA_MLME_ASSOCIATED:
2288 ieee80211_associated(sdata, ifsta);
2289 break;
2290 case IEEE80211_STA_MLME_IBSS_SEARCH:
2291 ieee80211_sta_find_ibss(sdata, ifsta);
2292 break;
2293 case IEEE80211_STA_MLME_IBSS_JOINED:
2294 ieee80211_sta_merge_ibss(sdata, ifsta);
2295 break;
2296 default:
2297 WARN_ON(1);
2298 break;
2299 }
2300
2301 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
2302 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2303 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2304
2305 ieee80211_set_disassoc(sdata, ifsta, false, true,
2306 WLAN_REASON_UNSPECIFIED);
2307 }
2308 }
2309
2310 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2311 {
2312 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2313 queue_work(sdata->local->hw.workqueue,
2314 &sdata->u.sta.work);
2315 }
2316
2317 /* interface setup */
2318 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2319 {
2320 struct ieee80211_if_sta *ifsta;
2321
2322 ifsta = &sdata->u.sta;
2323 INIT_WORK(&ifsta->work, ieee80211_sta_work);
2324 setup_timer(&ifsta->timer, ieee80211_sta_timer,
2325 (unsigned long) sdata);
2326 skb_queue_head_init(&ifsta->skb_queue);
2327
2328 ifsta->capab = WLAN_CAPABILITY_ESS;
2329 ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2330 IEEE80211_AUTH_ALG_SHARED_KEY;
2331 ifsta->flags |= IEEE80211_STA_CREATE_IBSS |
2332 IEEE80211_STA_AUTO_BSSID_SEL |
2333 IEEE80211_STA_AUTO_CHANNEL_SEL;
2334 if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4)
2335 ifsta->flags |= IEEE80211_STA_WMM_ENABLED;
2336 }
2337
2338 /*
2339 * Add a new IBSS station, will also be called by the RX code when,
2340 * in IBSS mode, receiving a frame from a yet-unknown station, hence
2341 * must be callable in atomic context.
2342 */
2343 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
2344 struct sk_buff *skb, u8 *bssid,
2345 u8 *addr, u64 supp_rates)
2346 {
2347 struct ieee80211_local *local = sdata->local;
2348 struct sta_info *sta;
2349 DECLARE_MAC_BUF(mac);
2350 int band = local->hw.conf.channel->band;
2351
2352 /* TODO: Could consider removing the least recently used entry and
2353 * allow new one to be added. */
2354 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
2355 if (net_ratelimit()) {
2356 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
2357 "entry %s\n", sdata->dev->name, print_mac(mac, addr));
2358 }
2359 return NULL;
2360 }
2361
2362 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
2363 return NULL;
2364
2365 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2366 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
2367 wiphy_name(local->hw.wiphy), print_mac(mac, addr), sdata->dev->name);
2368 #endif
2369
2370 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
2371 if (!sta)
2372 return NULL;
2373
2374 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
2375
2376 /* make sure mandatory rates are always added */
2377 sta->sta.supp_rates[band] = supp_rates |
2378 ieee80211_mandatory_rates(local, band);
2379
2380 rate_control_rate_init(sta);
2381
2382 if (sta_info_insert(sta))
2383 return NULL;
2384
2385 return sta;
2386 }
2387
2388 /* configuration hooks */
2389 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
2390 struct ieee80211_if_sta *ifsta)
2391 {
2392 struct ieee80211_local *local = sdata->local;
2393
2394 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2395 return;
2396
2397 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2398 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2399 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2400 IEEE80211_STA_AUTO_SSID_SEL))) {
2401
2402 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED)
2403 ieee80211_set_disassoc(sdata, ifsta, true, true,
2404 WLAN_REASON_DEAUTH_LEAVING);
2405
2406 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2407 queue_work(local->hw.workqueue, &ifsta->work);
2408 }
2409 }
2410
2411 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2412 {
2413 struct ieee80211_if_sta *ifsta;
2414 int res;
2415
2416 if (len > IEEE80211_MAX_SSID_LEN)
2417 return -EINVAL;
2418
2419 ifsta = &sdata->u.sta;
2420
2421 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
2422 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
2423 memcpy(ifsta->ssid, ssid, len);
2424 ifsta->ssid_len = len;
2425 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2426
2427 res = 0;
2428 /*
2429 * Hack! MLME code needs to be cleaned up to have different
2430 * entry points for configuration and internal selection change
2431 */
2432 if (netif_running(sdata->dev))
2433 res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID);
2434 if (res) {
2435 printk(KERN_DEBUG "%s: Failed to config new SSID to "
2436 "the low-level driver\n", sdata->dev->name);
2437 return res;
2438 }
2439 }
2440
2441 if (len)
2442 ifsta->flags |= IEEE80211_STA_SSID_SET;
2443 else
2444 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
2445
2446 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
2447 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
2448 ifsta->ibss_join_req = jiffies;
2449 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2450 return ieee80211_sta_find_ibss(sdata, ifsta);
2451 }
2452
2453 return 0;
2454 }
2455
2456 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2457 {
2458 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2459 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2460 *len = ifsta->ssid_len;
2461 return 0;
2462 }
2463
2464 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2465 {
2466 struct ieee80211_if_sta *ifsta;
2467 int res;
2468
2469 ifsta = &sdata->u.sta;
2470
2471 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2472 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2473 res = 0;
2474 /*
2475 * Hack! See also ieee80211_sta_set_ssid.
2476 */
2477 if (netif_running(sdata->dev))
2478 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
2479 if (res) {
2480 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2481 "the low-level driver\n", sdata->dev->name);
2482 return res;
2483 }
2484 }
2485
2486 if (is_valid_ether_addr(bssid))
2487 ifsta->flags |= IEEE80211_STA_BSSID_SET;
2488 else
2489 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
2490
2491 return 0;
2492 }
2493
2494 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
2495 {
2496 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2497
2498 kfree(ifsta->extra_ie);
2499 if (len == 0) {
2500 ifsta->extra_ie = NULL;
2501 ifsta->extra_ie_len = 0;
2502 return 0;
2503 }
2504 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
2505 if (!ifsta->extra_ie) {
2506 ifsta->extra_ie_len = 0;
2507 return -ENOMEM;
2508 }
2509 memcpy(ifsta->extra_ie, ie, len);
2510 ifsta->extra_ie_len = len;
2511 return 0;
2512 }
2513
2514 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2515 {
2516 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2517
2518 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2519 sdata->dev->name, reason);
2520
2521 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
2522 sdata->vif.type != NL80211_IFTYPE_ADHOC)
2523 return -EINVAL;
2524
2525 ieee80211_set_disassoc(sdata, ifsta, true, true, reason);
2526 return 0;
2527 }
2528
2529 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2530 {
2531 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2532
2533 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2534 sdata->dev->name, reason);
2535
2536 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2537 return -EINVAL;
2538
2539 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
2540 return -1;
2541
2542 ieee80211_set_disassoc(sdata, ifsta, false, true, reason);
2543 return 0;
2544 }
2545
2546 /* scan finished notification */
2547 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2548 {
2549 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2550 struct ieee80211_if_sta *ifsta;
2551
2552 if (sdata && sdata->vif.type == NL80211_IFTYPE_ADHOC) {
2553 ifsta = &sdata->u.sta;
2554 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
2555 (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) &&
2556 !ieee80211_sta_active_ibss(sdata)))
2557 ieee80211_sta_find_ibss(sdata, ifsta);
2558 }
2559
2560 /* Restart STA timers */
2561 rcu_read_lock();
2562 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2563 ieee80211_restart_sta_timer(sdata);
2564 rcu_read_unlock();
2565 }
2566
2567 /* driver notification call */
2568 void ieee80211_notify_mac(struct ieee80211_hw *hw,
2569 enum ieee80211_notification_types notif_type)
2570 {
2571 struct ieee80211_local *local = hw_to_local(hw);
2572 struct ieee80211_sub_if_data *sdata;
2573
2574 switch (notif_type) {
2575 case IEEE80211_NOTIFY_RE_ASSOC:
2576 rcu_read_lock();
2577 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
2578 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2579 continue;
2580
2581 ieee80211_sta_req_auth(sdata, &sdata->u.sta);
2582 }
2583 rcu_read_unlock();
2584 break;
2585 }
2586 }
2587 EXPORT_SYMBOL(ieee80211_notify_mac);
Linux kernel - Deliverables
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