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nl80211: Optional IEs into scan request
[deliverable/linux.git] / net / mac80211 / mlme.c
1 /*
2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.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/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/rtnetlink.h>
20 #include <net/mac80211.h>
21 #include <asm/unaligned.h>
22
23 #include "ieee80211_i.h"
24 #include "rate.h"
25 #include "led.h"
26
27 #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
28 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
29 #define IEEE80211_AUTH_MAX_TRIES 3
30 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
31 #define IEEE80211_ASSOC_MAX_TRIES 3
32 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
33 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
34 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
35
36 /* utils */
37 static int ecw2cw(int ecw)
38 {
39 return (1 << ecw) - 1;
40 }
41
42 static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
43 {
44 u8 *end, *pos;
45
46 pos = bss->cbss.information_elements;
47 if (pos == NULL)
48 return NULL;
49 end = pos + bss->cbss.len_information_elements;
50
51 while (pos + 1 < end) {
52 if (pos + 2 + pos[1] > end)
53 break;
54 if (pos[0] == ie)
55 return pos;
56 pos += 2 + pos[1];
57 }
58
59 return NULL;
60 }
61
62 static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
63 struct ieee80211_supported_band *sband,
64 u32 *rates)
65 {
66 int i, j, count;
67 *rates = 0;
68 count = 0;
69 for (i = 0; i < bss->supp_rates_len; i++) {
70 int rate = (bss->supp_rates[i] & 0x7F) * 5;
71
72 for (j = 0; j < sband->n_bitrates; j++)
73 if (sband->bitrates[j].bitrate == rate) {
74 *rates |= BIT(j);
75 count++;
76 break;
77 }
78 }
79
80 return count;
81 }
82
83 /* frame sending functions */
84
85 static void add_extra_ies(struct sk_buff *skb, u8 *ies, size_t ies_len)
86 {
87 if (ies)
88 memcpy(skb_put(skb, ies_len), ies, ies_len);
89 }
90
91 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
92 {
93 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
94 struct ieee80211_local *local = sdata->local;
95 struct sk_buff *skb;
96 struct ieee80211_mgmt *mgmt;
97 u8 *pos, *ies, *ht_ie, *e_ies;
98 int i, len, count, rates_len, supp_rates_len;
99 u16 capab;
100 struct ieee80211_bss *bss;
101 int wmm = 0;
102 struct ieee80211_supported_band *sband;
103 u32 rates = 0;
104 size_t e_ies_len;
105
106 if (ifmgd->flags & IEEE80211_IBSS_PREV_BSSID_SET) {
107 e_ies = sdata->u.mgd.ie_reassocreq;
108 e_ies_len = sdata->u.mgd.ie_reassocreq_len;
109 } else {
110 e_ies = sdata->u.mgd.ie_assocreq;
111 e_ies_len = sdata->u.mgd.ie_assocreq_len;
112 }
113
114 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
115 sizeof(*mgmt) + 200 + ifmgd->extra_ie_len +
116 ifmgd->ssid_len + e_ies_len);
117 if (!skb) {
118 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
119 "frame\n", sdata->dev->name);
120 return;
121 }
122 skb_reserve(skb, local->hw.extra_tx_headroom);
123
124 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
125
126 capab = ifmgd->capab;
127
128 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
129 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
130 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
131 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
132 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
133 }
134
135 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
136 local->hw.conf.channel->center_freq,
137 ifmgd->ssid, ifmgd->ssid_len);
138 if (bss) {
139 if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
140 capab |= WLAN_CAPABILITY_PRIVACY;
141 if (bss->wmm_used)
142 wmm = 1;
143
144 /* get all rates supported by the device and the AP as
145 * some APs don't like getting a superset of their rates
146 * in the association request (e.g. D-Link DAP 1353 in
147 * b-only mode) */
148 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
149
150 if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
151 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
152 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
153
154 ieee80211_rx_bss_put(local, bss);
155 } else {
156 rates = ~0;
157 rates_len = sband->n_bitrates;
158 }
159
160 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
161 memset(mgmt, 0, 24);
162 memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
163 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
164 memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
165
166 if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) {
167 skb_put(skb, 10);
168 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
169 IEEE80211_STYPE_REASSOC_REQ);
170 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
171 mgmt->u.reassoc_req.listen_interval =
172 cpu_to_le16(local->hw.conf.listen_interval);
173 memcpy(mgmt->u.reassoc_req.current_ap, ifmgd->prev_bssid,
174 ETH_ALEN);
175 } else {
176 skb_put(skb, 4);
177 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
178 IEEE80211_STYPE_ASSOC_REQ);
179 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
180 mgmt->u.assoc_req.listen_interval =
181 cpu_to_le16(local->hw.conf.listen_interval);
182 }
183
184 /* SSID */
185 ies = pos = skb_put(skb, 2 + ifmgd->ssid_len);
186 *pos++ = WLAN_EID_SSID;
187 *pos++ = ifmgd->ssid_len;
188 memcpy(pos, ifmgd->ssid, ifmgd->ssid_len);
189
190 /* add all rates which were marked to be used above */
191 supp_rates_len = rates_len;
192 if (supp_rates_len > 8)
193 supp_rates_len = 8;
194
195 len = sband->n_bitrates;
196 pos = skb_put(skb, supp_rates_len + 2);
197 *pos++ = WLAN_EID_SUPP_RATES;
198 *pos++ = supp_rates_len;
199
200 count = 0;
201 for (i = 0; i < sband->n_bitrates; i++) {
202 if (BIT(i) & rates) {
203 int rate = sband->bitrates[i].bitrate;
204 *pos++ = (u8) (rate / 5);
205 if (++count == 8)
206 break;
207 }
208 }
209
210 if (rates_len > count) {
211 pos = skb_put(skb, rates_len - count + 2);
212 *pos++ = WLAN_EID_EXT_SUPP_RATES;
213 *pos++ = rates_len - count;
214
215 for (i++; i < sband->n_bitrates; i++) {
216 if (BIT(i) & rates) {
217 int rate = sband->bitrates[i].bitrate;
218 *pos++ = (u8) (rate / 5);
219 }
220 }
221 }
222
223 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
224 /* 1. power capabilities */
225 pos = skb_put(skb, 4);
226 *pos++ = WLAN_EID_PWR_CAPABILITY;
227 *pos++ = 2;
228 *pos++ = 0; /* min tx power */
229 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
230
231 /* 2. supported channels */
232 /* TODO: get this in reg domain format */
233 pos = skb_put(skb, 2 * sband->n_channels + 2);
234 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
235 *pos++ = 2 * sband->n_channels;
236 for (i = 0; i < sband->n_channels; i++) {
237 *pos++ = ieee80211_frequency_to_channel(
238 sband->channels[i].center_freq);
239 *pos++ = 1; /* one channel in the subband*/
240 }
241 }
242
243 if (ifmgd->extra_ie) {
244 pos = skb_put(skb, ifmgd->extra_ie_len);
245 memcpy(pos, ifmgd->extra_ie, ifmgd->extra_ie_len);
246 }
247
248 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
249 pos = skb_put(skb, 9);
250 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
251 *pos++ = 7; /* len */
252 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
253 *pos++ = 0x50;
254 *pos++ = 0xf2;
255 *pos++ = 2; /* WME */
256 *pos++ = 0; /* WME info */
257 *pos++ = 1; /* WME ver */
258 *pos++ = 0;
259 }
260
261 /* wmm support is a must to HT */
262 /*
263 * IEEE802.11n does not allow TKIP/WEP as pairwise
264 * ciphers in HT mode. We still associate in non-ht
265 * mode (11a/b/g) if any one of these ciphers is
266 * configured as pairwise.
267 */
268 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
269 sband->ht_cap.ht_supported &&
270 (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) &&
271 ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
272 (!(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))) {
273 struct ieee80211_ht_info *ht_info =
274 (struct ieee80211_ht_info *)(ht_ie + 2);
275 u16 cap = sband->ht_cap.cap;
276 __le16 tmp;
277 u32 flags = local->hw.conf.channel->flags;
278
279 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
280 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
281 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
282 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
283 cap &= ~IEEE80211_HT_CAP_SGI_40;
284 }
285 break;
286 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
287 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
288 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
289 cap &= ~IEEE80211_HT_CAP_SGI_40;
290 }
291 break;
292 }
293
294 tmp = cpu_to_le16(cap);
295 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
296 *pos++ = WLAN_EID_HT_CAPABILITY;
297 *pos++ = sizeof(struct ieee80211_ht_cap);
298 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
299 memcpy(pos, &tmp, sizeof(u16));
300 pos += sizeof(u16);
301 /* TODO: needs a define here for << 2 */
302 *pos++ = sband->ht_cap.ampdu_factor |
303 (sband->ht_cap.ampdu_density << 2);
304 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
305 }
306
307 add_extra_ies(skb, e_ies, e_ies_len);
308
309 kfree(ifmgd->assocreq_ies);
310 ifmgd->assocreq_ies_len = (skb->data + skb->len) - ies;
311 ifmgd->assocreq_ies = kmalloc(ifmgd->assocreq_ies_len, GFP_KERNEL);
312 if (ifmgd->assocreq_ies)
313 memcpy(ifmgd->assocreq_ies, ies, ifmgd->assocreq_ies_len);
314
315 ieee80211_tx_skb(sdata, skb, 0);
316 }
317
318
319 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
320 u16 stype, u16 reason)
321 {
322 struct ieee80211_local *local = sdata->local;
323 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
324 struct sk_buff *skb;
325 struct ieee80211_mgmt *mgmt;
326 u8 *ies;
327 size_t ies_len;
328
329 if (stype == IEEE80211_STYPE_DEAUTH) {
330 ies = sdata->u.mgd.ie_deauth;
331 ies_len = sdata->u.mgd.ie_deauth_len;
332 } else {
333 ies = sdata->u.mgd.ie_disassoc;
334 ies_len = sdata->u.mgd.ie_disassoc_len;
335 }
336
337 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) +
338 ies_len);
339 if (!skb) {
340 printk(KERN_DEBUG "%s: failed to allocate buffer for "
341 "deauth/disassoc frame\n", sdata->dev->name);
342 return;
343 }
344 skb_reserve(skb, local->hw.extra_tx_headroom);
345
346 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
347 memset(mgmt, 0, 24);
348 memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
349 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
350 memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
351 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
352 skb_put(skb, 2);
353 /* u.deauth.reason_code == u.disassoc.reason_code */
354 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
355
356 add_extra_ies(skb, ies, ies_len);
357
358 ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
359 }
360
361 void ieee80211_send_pspoll(struct ieee80211_local *local,
362 struct ieee80211_sub_if_data *sdata)
363 {
364 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
365 struct ieee80211_pspoll *pspoll;
366 struct sk_buff *skb;
367 u16 fc;
368
369 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
370 if (!skb) {
371 printk(KERN_DEBUG "%s: failed to allocate buffer for "
372 "pspoll frame\n", sdata->dev->name);
373 return;
374 }
375 skb_reserve(skb, local->hw.extra_tx_headroom);
376
377 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
378 memset(pspoll, 0, sizeof(*pspoll));
379 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
380 pspoll->frame_control = cpu_to_le16(fc);
381 pspoll->aid = cpu_to_le16(ifmgd->aid);
382
383 /* aid in PS-Poll has its two MSBs each set to 1 */
384 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
385
386 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
387 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
388
389 ieee80211_tx_skb(sdata, skb, 0);
390 }
391
392 /* MLME */
393 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
394 struct ieee80211_if_managed *ifmgd,
395 u8 *wmm_param, size_t wmm_param_len)
396 {
397 struct ieee80211_tx_queue_params params;
398 size_t left;
399 int count;
400 u8 *pos;
401
402 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
403 return;
404
405 if (!wmm_param)
406 return;
407
408 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
409 return;
410 count = wmm_param[6] & 0x0f;
411 if (count == ifmgd->wmm_last_param_set)
412 return;
413 ifmgd->wmm_last_param_set = count;
414
415 pos = wmm_param + 8;
416 left = wmm_param_len - 8;
417
418 memset(&params, 0, sizeof(params));
419
420 if (!local->ops->conf_tx)
421 return;
422
423 local->wmm_acm = 0;
424 for (; left >= 4; left -= 4, pos += 4) {
425 int aci = (pos[0] >> 5) & 0x03;
426 int acm = (pos[0] >> 4) & 0x01;
427 int queue;
428
429 switch (aci) {
430 case 1:
431 queue = 3;
432 if (acm)
433 local->wmm_acm |= BIT(0) | BIT(3);
434 break;
435 case 2:
436 queue = 1;
437 if (acm)
438 local->wmm_acm |= BIT(4) | BIT(5);
439 break;
440 case 3:
441 queue = 0;
442 if (acm)
443 local->wmm_acm |= BIT(6) | BIT(7);
444 break;
445 case 0:
446 default:
447 queue = 2;
448 if (acm)
449 local->wmm_acm |= BIT(1) | BIT(2);
450 break;
451 }
452
453 params.aifs = pos[0] & 0x0f;
454 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
455 params.cw_min = ecw2cw(pos[1] & 0x0f);
456 params.txop = get_unaligned_le16(pos + 2);
457 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
458 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
459 "cWmin=%d cWmax=%d txop=%d\n",
460 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
461 params.cw_max, params.txop);
462 #endif
463 /* TODO: handle ACM (block TX, fallback to next lowest allowed
464 * AC for now) */
465 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
466 printk(KERN_DEBUG "%s: failed to set TX queue "
467 "parameters for queue %d\n", local->mdev->name, queue);
468 }
469 }
470 }
471
472 static bool ieee80211_check_tim(struct ieee802_11_elems *elems, u16 aid)
473 {
474 u8 mask;
475 u8 index, indexn1, indexn2;
476 struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *) elems->tim;
477
478 aid &= 0x3fff;
479 index = aid / 8;
480 mask = 1 << (aid & 7);
481
482 indexn1 = tim->bitmap_ctrl & 0xfe;
483 indexn2 = elems->tim_len + indexn1 - 4;
484
485 if (index < indexn1 || index > indexn2)
486 return false;
487
488 index -= indexn1;
489
490 return !!(tim->virtual_map[index] & mask);
491 }
492
493 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
494 u16 capab, bool erp_valid, u8 erp)
495 {
496 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
497 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
498 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
499 #endif
500 u32 changed = 0;
501 bool use_protection;
502 bool use_short_preamble;
503 bool use_short_slot;
504
505 if (erp_valid) {
506 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
507 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
508 } else {
509 use_protection = false;
510 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
511 }
512
513 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
514
515 if (use_protection != bss_conf->use_cts_prot) {
516 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
517 if (net_ratelimit()) {
518 printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
519 sdata->dev->name,
520 use_protection ? "enabled" : "disabled",
521 ifmgd->bssid);
522 }
523 #endif
524 bss_conf->use_cts_prot = use_protection;
525 changed |= BSS_CHANGED_ERP_CTS_PROT;
526 }
527
528 if (use_short_preamble != bss_conf->use_short_preamble) {
529 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
530 if (net_ratelimit()) {
531 printk(KERN_DEBUG "%s: switched to %s barker preamble"
532 " (BSSID=%pM)\n",
533 sdata->dev->name,
534 use_short_preamble ? "short" : "long",
535 ifmgd->bssid);
536 }
537 #endif
538 bss_conf->use_short_preamble = use_short_preamble;
539 changed |= BSS_CHANGED_ERP_PREAMBLE;
540 }
541
542 if (use_short_slot != bss_conf->use_short_slot) {
543 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
544 if (net_ratelimit()) {
545 printk(KERN_DEBUG "%s: switched to %s slot time"
546 " (BSSID=%pM)\n",
547 sdata->dev->name,
548 use_short_slot ? "short" : "long",
549 ifmgd->bssid);
550 }
551 #endif
552 bss_conf->use_short_slot = use_short_slot;
553 changed |= BSS_CHANGED_ERP_SLOT;
554 }
555
556 return changed;
557 }
558
559 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata)
560 {
561 union iwreq_data wrqu;
562
563 memset(&wrqu, 0, sizeof(wrqu));
564 if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED)
565 memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN);
566 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
567 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
568 }
569
570 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata)
571 {
572 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
573 char *buf;
574 size_t len;
575 int i;
576 union iwreq_data wrqu;
577
578 if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies)
579 return;
580
581 buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len +
582 ifmgd->assocresp_ies_len), GFP_KERNEL);
583 if (!buf)
584 return;
585
586 len = sprintf(buf, "ASSOCINFO(");
587 if (ifmgd->assocreq_ies) {
588 len += sprintf(buf + len, "ReqIEs=");
589 for (i = 0; i < ifmgd->assocreq_ies_len; i++) {
590 len += sprintf(buf + len, "%02x",
591 ifmgd->assocreq_ies[i]);
592 }
593 }
594 if (ifmgd->assocresp_ies) {
595 if (ifmgd->assocreq_ies)
596 len += sprintf(buf + len, " ");
597 len += sprintf(buf + len, "RespIEs=");
598 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
599 len += sprintf(buf + len, "%02x",
600 ifmgd->assocresp_ies[i]);
601 }
602 }
603 len += sprintf(buf + len, ")");
604
605 if (len > IW_CUSTOM_MAX) {
606 len = sprintf(buf, "ASSOCRESPIE=");
607 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
608 len += sprintf(buf + len, "%02x",
609 ifmgd->assocresp_ies[i]);
610 }
611 }
612
613 if (len <= IW_CUSTOM_MAX) {
614 memset(&wrqu, 0, sizeof(wrqu));
615 wrqu.data.length = len;
616 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
617 }
618
619 kfree(buf);
620 }
621
622
623 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
624 u32 bss_info_changed)
625 {
626 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
627 struct ieee80211_local *local = sdata->local;
628 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
629
630 struct ieee80211_bss *bss;
631
632 bss_info_changed |= BSS_CHANGED_ASSOC;
633 ifmgd->flags |= IEEE80211_STA_ASSOCIATED;
634
635 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
636 conf->channel->center_freq,
637 ifmgd->ssid, ifmgd->ssid_len);
638 if (bss) {
639 /* set timing information */
640 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
641 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
642 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
643
644 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
645 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
646
647 ieee80211_rx_bss_put(local, bss);
648 }
649
650 ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET;
651 memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN);
652 ieee80211_sta_send_associnfo(sdata);
653
654 ifmgd->last_probe = jiffies;
655 ieee80211_led_assoc(local, 1);
656
657 sdata->vif.bss_conf.assoc = 1;
658 /*
659 * For now just always ask the driver to update the basic rateset
660 * when we have associated, we aren't checking whether it actually
661 * changed or not.
662 */
663 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
664 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
665
666 if (local->powersave) {
667 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) &&
668 local->hw.conf.dynamic_ps_timeout > 0) {
669 mod_timer(&local->dynamic_ps_timer, jiffies +
670 msecs_to_jiffies(
671 local->hw.conf.dynamic_ps_timeout));
672 } else {
673 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
674 ieee80211_send_nullfunc(local, sdata, 1);
675 conf->flags |= IEEE80211_CONF_PS;
676 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
677 }
678 }
679
680 netif_tx_start_all_queues(sdata->dev);
681 netif_carrier_on(sdata->dev);
682
683 ieee80211_sta_send_apinfo(sdata);
684 }
685
686 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata)
687 {
688 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
689
690 ifmgd->direct_probe_tries++;
691 if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
692 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
693 sdata->dev->name, ifmgd->bssid);
694 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
695 ieee80211_sta_send_apinfo(sdata);
696
697 /*
698 * Most likely AP is not in the range so remove the
699 * bss information associated to the AP
700 */
701 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
702 sdata->local->hw.conf.channel->center_freq,
703 ifmgd->ssid, ifmgd->ssid_len);
704 return;
705 }
706
707 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
708 sdata->dev->name, ifmgd->bssid,
709 ifmgd->direct_probe_tries);
710
711 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
712
713 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifmgd->request);
714
715 /* Direct probe is sent to broadcast address as some APs
716 * will not answer to direct packet in unassociated state.
717 */
718 ieee80211_send_probe_req(sdata, NULL,
719 ifmgd->ssid, ifmgd->ssid_len, NULL, 0);
720
721 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
722 }
723
724
725 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata)
726 {
727 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
728
729 ifmgd->auth_tries++;
730 if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
731 printk(KERN_DEBUG "%s: authentication with AP %pM"
732 " timed out\n",
733 sdata->dev->name, ifmgd->bssid);
734 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
735 ieee80211_sta_send_apinfo(sdata);
736 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
737 sdata->local->hw.conf.channel->center_freq,
738 ifmgd->ssid, ifmgd->ssid_len);
739 return;
740 }
741
742 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
743 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
744 sdata->dev->name, ifmgd->bssid);
745
746 ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, NULL, 0,
747 ifmgd->bssid, 0);
748 ifmgd->auth_transaction = 2;
749
750 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
751 }
752
753 /*
754 * The disassoc 'reason' argument can be either our own reason
755 * if self disconnected or a reason code from the AP.
756 */
757 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
758 bool deauth, bool self_disconnected,
759 u16 reason)
760 {
761 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
762 struct ieee80211_local *local = sdata->local;
763 struct sta_info *sta;
764 u32 changed = 0, config_changed = 0;
765
766 rcu_read_lock();
767
768 sta = sta_info_get(local, ifmgd->bssid);
769 if (!sta) {
770 rcu_read_unlock();
771 return;
772 }
773
774 if (deauth) {
775 ifmgd->direct_probe_tries = 0;
776 ifmgd->auth_tries = 0;
777 }
778 ifmgd->assoc_scan_tries = 0;
779 ifmgd->assoc_tries = 0;
780
781 netif_tx_stop_all_queues(sdata->dev);
782 netif_carrier_off(sdata->dev);
783
784 ieee80211_sta_tear_down_BA_sessions(sta);
785
786 if (self_disconnected) {
787 if (deauth)
788 ieee80211_send_deauth_disassoc(sdata,
789 IEEE80211_STYPE_DEAUTH, reason);
790 else
791 ieee80211_send_deauth_disassoc(sdata,
792 IEEE80211_STYPE_DISASSOC, reason);
793 }
794
795 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
796 changed |= ieee80211_reset_erp_info(sdata);
797
798 ieee80211_led_assoc(local, 0);
799 changed |= BSS_CHANGED_ASSOC;
800 sdata->vif.bss_conf.assoc = false;
801
802 ieee80211_sta_send_apinfo(sdata);
803
804 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
805 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
806 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
807 sdata->local->hw.conf.channel->center_freq,
808 ifmgd->ssid, ifmgd->ssid_len);
809 }
810
811 rcu_read_unlock();
812
813 /* channel(_type) changes are handled by ieee80211_hw_config */
814 local->oper_channel_type = NL80211_CHAN_NO_HT;
815
816 local->power_constr_level = 0;
817
818 del_timer_sync(&local->dynamic_ps_timer);
819 cancel_work_sync(&local->dynamic_ps_enable_work);
820
821 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
822 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
823 config_changed |= IEEE80211_CONF_CHANGE_PS;
824 }
825
826 ieee80211_hw_config(local, config_changed);
827 ieee80211_bss_info_change_notify(sdata, changed);
828
829 rcu_read_lock();
830
831 sta = sta_info_get(local, ifmgd->bssid);
832 if (!sta) {
833 rcu_read_unlock();
834 return;
835 }
836
837 sta_info_unlink(&sta);
838
839 rcu_read_unlock();
840
841 sta_info_destroy(sta);
842 }
843
844 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
845 {
846 if (!sdata || !sdata->default_key ||
847 sdata->default_key->conf.alg != ALG_WEP)
848 return 0;
849 return 1;
850 }
851
852 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata)
853 {
854 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
855 struct ieee80211_local *local = sdata->local;
856 struct ieee80211_bss *bss;
857 int bss_privacy;
858 int wep_privacy;
859 int privacy_invoked;
860
861 if (!ifmgd || (ifmgd->flags & IEEE80211_STA_MIXED_CELL))
862 return 0;
863
864 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
865 local->hw.conf.channel->center_freq,
866 ifmgd->ssid, ifmgd->ssid_len);
867 if (!bss)
868 return 0;
869
870 bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY);
871 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
872 privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED);
873
874 ieee80211_rx_bss_put(local, bss);
875
876 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
877 return 0;
878
879 return 1;
880 }
881
882 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata)
883 {
884 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
885
886 ifmgd->assoc_tries++;
887 if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
888 printk(KERN_DEBUG "%s: association with AP %pM"
889 " timed out\n",
890 sdata->dev->name, ifmgd->bssid);
891 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
892 ieee80211_sta_send_apinfo(sdata);
893 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
894 sdata->local->hw.conf.channel->center_freq,
895 ifmgd->ssid, ifmgd->ssid_len);
896 return;
897 }
898
899 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
900 printk(KERN_DEBUG "%s: associate with AP %pM\n",
901 sdata->dev->name, ifmgd->bssid);
902 if (ieee80211_privacy_mismatch(sdata)) {
903 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
904 "mixed-cell disabled - abort association\n", sdata->dev->name);
905 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
906 return;
907 }
908
909 ieee80211_send_assoc(sdata);
910
911 mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
912 }
913
914
915 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
916 {
917 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
918 struct ieee80211_local *local = sdata->local;
919 struct sta_info *sta;
920 int disassoc;
921
922 /* TODO: start monitoring current AP signal quality and number of
923 * missed beacons. Scan other channels every now and then and search
924 * for better APs. */
925 /* TODO: remove expired BSSes */
926
927 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED;
928
929 rcu_read_lock();
930
931 sta = sta_info_get(local, ifmgd->bssid);
932 if (!sta) {
933 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
934 sdata->dev->name, ifmgd->bssid);
935 disassoc = 1;
936 } else {
937 disassoc = 0;
938 if (time_after(jiffies,
939 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
940 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) {
941 printk(KERN_DEBUG "%s: No ProbeResp from "
942 "current AP %pM - assume out of "
943 "range\n",
944 sdata->dev->name, ifmgd->bssid);
945 disassoc = 1;
946 } else
947 ieee80211_send_probe_req(sdata, ifmgd->bssid,
948 ifmgd->ssid,
949 ifmgd->ssid_len,
950 NULL, 0);
951 ifmgd->flags ^= IEEE80211_STA_PROBEREQ_POLL;
952 } else {
953 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
954 if (time_after(jiffies, ifmgd->last_probe +
955 IEEE80211_PROBE_INTERVAL)) {
956 ifmgd->last_probe = jiffies;
957 ieee80211_send_probe_req(sdata, ifmgd->bssid,
958 ifmgd->ssid,
959 ifmgd->ssid_len,
960 NULL, 0);
961 }
962 }
963 }
964
965 rcu_read_unlock();
966
967 if (disassoc)
968 ieee80211_set_disassoc(sdata, true, true,
969 WLAN_REASON_PREV_AUTH_NOT_VALID);
970 else
971 mod_timer(&ifmgd->timer, jiffies +
972 IEEE80211_MONITORING_INTERVAL);
973 }
974
975
976 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata)
977 {
978 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
979
980 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
981 ifmgd->flags |= IEEE80211_STA_AUTHENTICATED;
982 ieee80211_associate(sdata);
983 }
984
985
986 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
987 struct ieee80211_mgmt *mgmt,
988 size_t len)
989 {
990 u8 *pos;
991 struct ieee802_11_elems elems;
992
993 pos = mgmt->u.auth.variable;
994 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
995 if (!elems.challenge)
996 return;
997 ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg,
998 elems.challenge - 2, elems.challenge_len + 2,
999 sdata->u.mgd.bssid, 1);
1000 sdata->u.mgd.auth_transaction = 4;
1001 }
1002
1003 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1004 struct ieee80211_mgmt *mgmt,
1005 size_t len)
1006 {
1007 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1008 u16 auth_alg, auth_transaction, status_code;
1009
1010 if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE)
1011 return;
1012
1013 if (len < 24 + 6)
1014 return;
1015
1016 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1017 return;
1018
1019 if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1020 return;
1021
1022 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1023 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1024 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1025
1026 if (auth_alg != ifmgd->auth_alg ||
1027 auth_transaction != ifmgd->auth_transaction)
1028 return;
1029
1030 if (status_code != WLAN_STATUS_SUCCESS) {
1031 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1032 u8 algs[3];
1033 const int num_algs = ARRAY_SIZE(algs);
1034 int i, pos;
1035 algs[0] = algs[1] = algs[2] = 0xff;
1036 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1037 algs[0] = WLAN_AUTH_OPEN;
1038 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1039 algs[1] = WLAN_AUTH_SHARED_KEY;
1040 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1041 algs[2] = WLAN_AUTH_LEAP;
1042 if (ifmgd->auth_alg == WLAN_AUTH_OPEN)
1043 pos = 0;
1044 else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY)
1045 pos = 1;
1046 else
1047 pos = 2;
1048 for (i = 0; i < num_algs; i++) {
1049 pos++;
1050 if (pos >= num_algs)
1051 pos = 0;
1052 if (algs[pos] == ifmgd->auth_alg ||
1053 algs[pos] == 0xff)
1054 continue;
1055 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1056 !ieee80211_sta_wep_configured(sdata))
1057 continue;
1058 ifmgd->auth_alg = algs[pos];
1059 break;
1060 }
1061 }
1062 return;
1063 }
1064
1065 switch (ifmgd->auth_alg) {
1066 case WLAN_AUTH_OPEN:
1067 case WLAN_AUTH_LEAP:
1068 ieee80211_auth_completed(sdata);
1069 break;
1070 case WLAN_AUTH_SHARED_KEY:
1071 if (ifmgd->auth_transaction == 4)
1072 ieee80211_auth_completed(sdata);
1073 else
1074 ieee80211_auth_challenge(sdata, mgmt, len);
1075 break;
1076 }
1077 }
1078
1079
1080 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1081 struct ieee80211_mgmt *mgmt,
1082 size_t len)
1083 {
1084 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1085 u16 reason_code;
1086
1087 if (len < 24 + 2)
1088 return;
1089
1090 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1091 return;
1092
1093 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1094
1095 if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED)
1096 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1097 sdata->dev->name, reason_code);
1098
1099 if (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1100 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE ||
1101 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1102 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1103 mod_timer(&ifmgd->timer, jiffies +
1104 IEEE80211_RETRY_AUTH_INTERVAL);
1105 }
1106
1107 ieee80211_set_disassoc(sdata, true, false, 0);
1108 ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED;
1109 }
1110
1111
1112 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1113 struct ieee80211_mgmt *mgmt,
1114 size_t len)
1115 {
1116 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1117 u16 reason_code;
1118
1119 if (len < 24 + 2)
1120 return;
1121
1122 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1123 return;
1124
1125 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1126
1127 if (ifmgd->flags & IEEE80211_STA_ASSOCIATED)
1128 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1129 sdata->dev->name, reason_code);
1130
1131 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1132 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1133 mod_timer(&ifmgd->timer, jiffies +
1134 IEEE80211_RETRY_AUTH_INTERVAL);
1135 }
1136
1137 ieee80211_set_disassoc(sdata, false, false, reason_code);
1138 }
1139
1140
1141 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1142 struct ieee80211_mgmt *mgmt,
1143 size_t len,
1144 int reassoc)
1145 {
1146 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1147 struct ieee80211_local *local = sdata->local;
1148 struct ieee80211_supported_band *sband;
1149 struct sta_info *sta;
1150 u32 rates, basic_rates;
1151 u16 capab_info, status_code, aid;
1152 struct ieee802_11_elems elems;
1153 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1154 u8 *pos;
1155 u32 changed = 0;
1156 int i, j;
1157 bool have_higher_than_11mbit = false, newsta = false;
1158 u16 ap_ht_cap_flags;
1159
1160 /* AssocResp and ReassocResp have identical structure, so process both
1161 * of them in this function. */
1162
1163 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1164 return;
1165
1166 if (len < 24 + 6)
1167 return;
1168
1169 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1170 return;
1171
1172 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1173 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1174 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1175
1176 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1177 "status=%d aid=%d)\n",
1178 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1179 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1180
1181 pos = mgmt->u.assoc_resp.variable;
1182 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1183
1184 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1185 elems.timeout_int && elems.timeout_int_len == 5 &&
1186 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1187 u32 tu, ms;
1188 tu = get_unaligned_le32(elems.timeout_int + 1);
1189 ms = tu * 1024 / 1000;
1190 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1191 "comeback duration %u TU (%u ms)\n",
1192 sdata->dev->name, tu, ms);
1193 if (ms > IEEE80211_ASSOC_TIMEOUT)
1194 mod_timer(&ifmgd->timer,
1195 jiffies + msecs_to_jiffies(ms));
1196 return;
1197 }
1198
1199 if (status_code != WLAN_STATUS_SUCCESS) {
1200 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1201 sdata->dev->name, status_code);
1202 /* if this was a reassociation, ensure we try a "full"
1203 * association next time. This works around some broken APs
1204 * which do not correctly reject reassociation requests. */
1205 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1206 return;
1207 }
1208
1209 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1210 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1211 "set\n", sdata->dev->name, aid);
1212 aid &= ~(BIT(15) | BIT(14));
1213
1214 if (!elems.supp_rates) {
1215 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1216 sdata->dev->name);
1217 return;
1218 }
1219
1220 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1221 ifmgd->aid = aid;
1222 ifmgd->ap_capab = capab_info;
1223
1224 kfree(ifmgd->assocresp_ies);
1225 ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1226 ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL);
1227 if (ifmgd->assocresp_ies)
1228 memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len);
1229
1230 rcu_read_lock();
1231
1232 /* Add STA entry for the AP */
1233 sta = sta_info_get(local, ifmgd->bssid);
1234 if (!sta) {
1235 newsta = true;
1236
1237 sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC);
1238 if (!sta) {
1239 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1240 " the AP\n", sdata->dev->name);
1241 rcu_read_unlock();
1242 return;
1243 }
1244
1245 /* update new sta with its last rx activity */
1246 sta->last_rx = jiffies;
1247 }
1248
1249 /*
1250 * FIXME: Do we really need to update the sta_info's information here?
1251 * We already know about the AP (we found it in our list) so it
1252 * should already be filled with the right info, no?
1253 * As is stands, all this is racy because typically we assume
1254 * the information that is filled in here (except flags) doesn't
1255 * change while a STA structure is alive. As such, it should move
1256 * to between the sta_info_alloc() and sta_info_insert() above.
1257 */
1258
1259 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1260 WLAN_STA_AUTHORIZED);
1261
1262 rates = 0;
1263 basic_rates = 0;
1264 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1265
1266 for (i = 0; i < elems.supp_rates_len; i++) {
1267 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1268 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1269
1270 if (rate > 110)
1271 have_higher_than_11mbit = true;
1272
1273 for (j = 0; j < sband->n_bitrates; j++) {
1274 if (sband->bitrates[j].bitrate == rate) {
1275 rates |= BIT(j);
1276 if (is_basic)
1277 basic_rates |= BIT(j);
1278 break;
1279 }
1280 }
1281 }
1282
1283 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1284 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1285 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1286
1287 if (rate > 110)
1288 have_higher_than_11mbit = true;
1289
1290 for (j = 0; j < sband->n_bitrates; j++) {
1291 if (sband->bitrates[j].bitrate == rate) {
1292 rates |= BIT(j);
1293 if (is_basic)
1294 basic_rates |= BIT(j);
1295 break;
1296 }
1297 }
1298 }
1299
1300 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1301 sdata->vif.bss_conf.basic_rates = basic_rates;
1302
1303 /* cf. IEEE 802.11 9.2.12 */
1304 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1305 have_higher_than_11mbit)
1306 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1307 else
1308 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1309
1310 if (elems.ht_cap_elem)
1311 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1312 elems.ht_cap_elem, &sta->sta.ht_cap);
1313
1314 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1315
1316 rate_control_rate_init(sta);
1317
1318 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1319 set_sta_flags(sta, WLAN_STA_MFP);
1320
1321 if (elems.wmm_param)
1322 set_sta_flags(sta, WLAN_STA_WME);
1323
1324 if (newsta) {
1325 int err = sta_info_insert(sta);
1326 if (err) {
1327 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1328 " the AP (error %d)\n", sdata->dev->name, err);
1329 rcu_read_unlock();
1330 return;
1331 }
1332 }
1333
1334 rcu_read_unlock();
1335
1336 if (elems.wmm_param)
1337 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1338 elems.wmm_param_len);
1339
1340 if (elems.ht_info_elem && elems.wmm_param &&
1341 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1342 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1343 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1344 ap_ht_cap_flags);
1345
1346 /* set AID and assoc capability,
1347 * ieee80211_set_associated() will tell the driver */
1348 bss_conf->aid = aid;
1349 bss_conf->assoc_capability = capab_info;
1350 ieee80211_set_associated(sdata, changed);
1351
1352 ieee80211_associated(sdata);
1353 }
1354
1355
1356 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1357 struct ieee80211_mgmt *mgmt,
1358 size_t len,
1359 struct ieee80211_rx_status *rx_status,
1360 struct ieee802_11_elems *elems,
1361 bool beacon)
1362 {
1363 struct ieee80211_local *local = sdata->local;
1364 int freq;
1365 struct ieee80211_bss *bss;
1366 struct ieee80211_channel *channel;
1367
1368 if (elems->ds_params && elems->ds_params_len == 1)
1369 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1370 else
1371 freq = rx_status->freq;
1372
1373 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1374
1375 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1376 return;
1377
1378 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1379 channel, beacon);
1380 if (!bss)
1381 return;
1382
1383 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1384 (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) {
1385 struct ieee80211_channel_sw_ie *sw_elem =
1386 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1387 ieee80211_process_chanswitch(sdata, sw_elem, bss);
1388 }
1389
1390 ieee80211_rx_bss_put(local, bss);
1391 }
1392
1393
1394 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1395 struct ieee80211_mgmt *mgmt,
1396 size_t len,
1397 struct ieee80211_rx_status *rx_status)
1398 {
1399 size_t baselen;
1400 struct ieee802_11_elems elems;
1401
1402 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1403 return; /* ignore ProbeResp to foreign address */
1404
1405 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1406 if (baselen > len)
1407 return;
1408
1409 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1410 &elems);
1411
1412 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1413
1414 /* direct probe may be part of the association flow */
1415 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1416 &sdata->u.mgd.request)) {
1417 printk(KERN_DEBUG "%s direct probe responded\n",
1418 sdata->dev->name);
1419 ieee80211_authenticate(sdata);
1420 }
1421 }
1422
1423 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1424 struct ieee80211_mgmt *mgmt,
1425 size_t len,
1426 struct ieee80211_rx_status *rx_status)
1427 {
1428 struct ieee80211_if_managed *ifmgd;
1429 size_t baselen;
1430 struct ieee802_11_elems elems;
1431 struct ieee80211_local *local = sdata->local;
1432 u32 changed = 0;
1433 bool erp_valid, directed_tim;
1434 u8 erp_value = 0;
1435
1436 /* Process beacon from the current BSS */
1437 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1438 if (baselen > len)
1439 return;
1440
1441 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1442
1443 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
1444
1445 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1446 return;
1447
1448 ifmgd = &sdata->u.mgd;
1449
1450 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) ||
1451 memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1452 return;
1453
1454 if (rx_status->freq != local->hw.conf.channel->center_freq)
1455 return;
1456
1457 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1458 elems.wmm_param_len);
1459
1460 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK &&
1461 local->hw.conf.flags & IEEE80211_CONF_PS) {
1462 directed_tim = ieee80211_check_tim(&elems, ifmgd->aid);
1463
1464 if (directed_tim) {
1465 if (local->hw.conf.dynamic_ps_timeout > 0) {
1466 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1467 ieee80211_hw_config(local,
1468 IEEE80211_CONF_CHANGE_PS);
1469 ieee80211_send_nullfunc(local, sdata, 0);
1470 } else {
1471 local->pspolling = true;
1472
1473 /*
1474 * Here is assumed that the driver will be
1475 * able to send ps-poll frame and receive a
1476 * response even though power save mode is
1477 * enabled, but some drivers might require
1478 * to disable power save here. This needs
1479 * to be investigated.
1480 */
1481 ieee80211_send_pspoll(local, sdata);
1482 }
1483 }
1484 }
1485
1486 if (elems.erp_info && elems.erp_info_len >= 1) {
1487 erp_valid = true;
1488 erp_value = elems.erp_info[0];
1489 } else {
1490 erp_valid = false;
1491 }
1492 changed |= ieee80211_handle_bss_capability(sdata,
1493 le16_to_cpu(mgmt->u.beacon.capab_info),
1494 erp_valid, erp_value);
1495
1496
1497 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1498 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) {
1499 struct sta_info *sta;
1500 struct ieee80211_supported_band *sband;
1501 u16 ap_ht_cap_flags;
1502
1503 rcu_read_lock();
1504
1505 sta = sta_info_get(local, ifmgd->bssid);
1506 if (!sta) {
1507 rcu_read_unlock();
1508 return;
1509 }
1510
1511 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1512
1513 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1514 elems.ht_cap_elem, &sta->sta.ht_cap);
1515
1516 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1517
1518 rcu_read_unlock();
1519
1520 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1521 ap_ht_cap_flags);
1522 }
1523
1524 if (elems.country_elem) {
1525 /* Note we are only reviewing this on beacons
1526 * for the BSSID we are associated to */
1527 regulatory_hint_11d(local->hw.wiphy,
1528 elems.country_elem, elems.country_elem_len);
1529
1530 /* TODO: IBSS also needs this */
1531 if (elems.pwr_constr_elem)
1532 ieee80211_handle_pwr_constr(sdata,
1533 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1534 elems.pwr_constr_elem,
1535 elems.pwr_constr_elem_len);
1536 }
1537
1538 ieee80211_bss_info_change_notify(sdata, changed);
1539 }
1540
1541 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1542 struct sk_buff *skb,
1543 struct ieee80211_rx_status *rx_status)
1544 {
1545 struct ieee80211_local *local = sdata->local;
1546 struct ieee80211_mgmt *mgmt;
1547 u16 fc;
1548
1549 if (skb->len < 24)
1550 return RX_DROP_MONITOR;
1551
1552 mgmt = (struct ieee80211_mgmt *) skb->data;
1553 fc = le16_to_cpu(mgmt->frame_control);
1554
1555 switch (fc & IEEE80211_FCTL_STYPE) {
1556 case IEEE80211_STYPE_PROBE_REQ:
1557 case IEEE80211_STYPE_PROBE_RESP:
1558 case IEEE80211_STYPE_BEACON:
1559 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1560 case IEEE80211_STYPE_AUTH:
1561 case IEEE80211_STYPE_ASSOC_RESP:
1562 case IEEE80211_STYPE_REASSOC_RESP:
1563 case IEEE80211_STYPE_DEAUTH:
1564 case IEEE80211_STYPE_DISASSOC:
1565 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1566 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
1567 return RX_QUEUED;
1568 }
1569
1570 return RX_DROP_MONITOR;
1571 }
1572
1573 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1574 struct sk_buff *skb)
1575 {
1576 struct ieee80211_rx_status *rx_status;
1577 struct ieee80211_mgmt *mgmt;
1578 u16 fc;
1579
1580 rx_status = (struct ieee80211_rx_status *) skb->cb;
1581 mgmt = (struct ieee80211_mgmt *) skb->data;
1582 fc = le16_to_cpu(mgmt->frame_control);
1583
1584 switch (fc & IEEE80211_FCTL_STYPE) {
1585 case IEEE80211_STYPE_PROBE_RESP:
1586 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
1587 rx_status);
1588 break;
1589 case IEEE80211_STYPE_BEACON:
1590 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1591 rx_status);
1592 break;
1593 case IEEE80211_STYPE_AUTH:
1594 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
1595 break;
1596 case IEEE80211_STYPE_ASSOC_RESP:
1597 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0);
1598 break;
1599 case IEEE80211_STYPE_REASSOC_RESP:
1600 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1);
1601 break;
1602 case IEEE80211_STYPE_DEAUTH:
1603 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1604 break;
1605 case IEEE80211_STYPE_DISASSOC:
1606 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1607 break;
1608 }
1609
1610 kfree_skb(skb);
1611 }
1612
1613 static void ieee80211_sta_timer(unsigned long data)
1614 {
1615 struct ieee80211_sub_if_data *sdata =
1616 (struct ieee80211_sub_if_data *) data;
1617 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1618 struct ieee80211_local *local = sdata->local;
1619
1620 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1621 queue_work(local->hw.workqueue, &ifmgd->work);
1622 }
1623
1624 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata)
1625 {
1626 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1627 struct ieee80211_local *local = sdata->local;
1628
1629 if (local->ops->reset_tsf) {
1630 /* Reset own TSF to allow time synchronization work. */
1631 local->ops->reset_tsf(local_to_hw(local));
1632 }
1633
1634 ifmgd->wmm_last_param_set = -1; /* allow any WMM update */
1635
1636
1637 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1638 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1639 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1640 ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY;
1641 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1642 ifmgd->auth_alg = WLAN_AUTH_LEAP;
1643 else
1644 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1645 ifmgd->auth_transaction = -1;
1646 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
1647 ifmgd->assoc_scan_tries = 0;
1648 ifmgd->direct_probe_tries = 0;
1649 ifmgd->auth_tries = 0;
1650 ifmgd->assoc_tries = 0;
1651 netif_tx_stop_all_queues(sdata->dev);
1652 netif_carrier_off(sdata->dev);
1653 }
1654
1655 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata)
1656 {
1657 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1658 struct ieee80211_local *local = sdata->local;
1659 struct ieee80211_bss *bss;
1660 u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid;
1661 u8 ssid_len = ifmgd->ssid_len;
1662 u16 capa_mask = WLAN_CAPABILITY_ESS;
1663 u16 capa_val = WLAN_CAPABILITY_ESS;
1664 struct ieee80211_channel *chan = local->oper_channel;
1665
1666 if (ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL |
1667 IEEE80211_STA_AUTO_BSSID_SEL |
1668 IEEE80211_STA_AUTO_CHANNEL_SEL)) {
1669 capa_mask |= WLAN_CAPABILITY_PRIVACY;
1670 if (sdata->default_key)
1671 capa_val |= WLAN_CAPABILITY_PRIVACY;
1672 }
1673
1674 if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
1675 chan = NULL;
1676
1677 if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL)
1678 bssid = NULL;
1679
1680 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) {
1681 ssid = NULL;
1682 ssid_len = 0;
1683 }
1684
1685 bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
1686 bssid, ssid, ssid_len,
1687 capa_mask, capa_val);
1688
1689 if (bss) {
1690 ieee80211_set_freq(sdata, bss->cbss.channel->center_freq);
1691 if (!(ifmgd->flags & IEEE80211_STA_SSID_SET))
1692 ieee80211_sta_set_ssid(sdata, bss->ssid,
1693 bss->ssid_len);
1694 ieee80211_sta_set_bssid(sdata, bss->cbss.bssid);
1695 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
1696 bss->supp_rates);
1697 if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED)
1698 sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED;
1699 else
1700 sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED;
1701
1702 /* Send out direct probe if no probe resp was received or
1703 * the one we have is outdated
1704 */
1705 if (!bss->last_probe_resp ||
1706 time_after(jiffies, bss->last_probe_resp
1707 + IEEE80211_SCAN_RESULT_EXPIRE))
1708 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1709 else
1710 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
1711
1712 ieee80211_rx_bss_put(local, bss);
1713 ieee80211_sta_reset_auth(sdata);
1714 return 0;
1715 } else {
1716 if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
1717 ifmgd->assoc_scan_tries++;
1718 /* XXX maybe racy? */
1719 if (local->scan_req)
1720 return -1;
1721 memcpy(local->int_scan_req.ssids[0].ssid,
1722 ifmgd->ssid, IEEE80211_MAX_SSID_LEN);
1723 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL)
1724 local->int_scan_req.ssids[0].ssid_len = 0;
1725 else
1726 local->int_scan_req.ssids[0].ssid_len = ifmgd->ssid_len;
1727 ieee80211_start_scan(sdata, &local->int_scan_req);
1728 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
1729 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
1730 } else {
1731 ifmgd->assoc_scan_tries = 0;
1732 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1733 }
1734 }
1735 return -1;
1736 }
1737
1738
1739 static void ieee80211_sta_work(struct work_struct *work)
1740 {
1741 struct ieee80211_sub_if_data *sdata =
1742 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
1743 struct ieee80211_local *local = sdata->local;
1744 struct ieee80211_if_managed *ifmgd;
1745 struct sk_buff *skb;
1746
1747 if (!netif_running(sdata->dev))
1748 return;
1749
1750 if (local->sw_scanning || local->hw_scanning)
1751 return;
1752
1753 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1754 return;
1755 ifmgd = &sdata->u.mgd;
1756
1757 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
1758 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1759
1760 if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
1761 ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE &&
1762 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE &&
1763 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) {
1764 ieee80211_start_scan(sdata, local->scan_req);
1765 return;
1766 }
1767
1768 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) {
1769 if (ieee80211_sta_config_auth(sdata))
1770 return;
1771 clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1772 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request))
1773 return;
1774
1775 switch (ifmgd->state) {
1776 case IEEE80211_STA_MLME_DISABLED:
1777 break;
1778 case IEEE80211_STA_MLME_DIRECT_PROBE:
1779 ieee80211_direct_probe(sdata);
1780 break;
1781 case IEEE80211_STA_MLME_AUTHENTICATE:
1782 ieee80211_authenticate(sdata);
1783 break;
1784 case IEEE80211_STA_MLME_ASSOCIATE:
1785 ieee80211_associate(sdata);
1786 break;
1787 case IEEE80211_STA_MLME_ASSOCIATED:
1788 ieee80211_associated(sdata);
1789 break;
1790 default:
1791 WARN_ON(1);
1792 break;
1793 }
1794
1795 if (ieee80211_privacy_mismatch(sdata)) {
1796 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
1797 "mixed-cell disabled - disassociate\n", sdata->dev->name);
1798
1799 ieee80211_set_disassoc(sdata, false, true,
1800 WLAN_REASON_UNSPECIFIED);
1801 }
1802 }
1803
1804 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
1805 {
1806 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1807 queue_work(sdata->local->hw.workqueue,
1808 &sdata->u.mgd.work);
1809 }
1810
1811 /* interface setup */
1812 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
1813 {
1814 struct ieee80211_if_managed *ifmgd;
1815
1816 ifmgd = &sdata->u.mgd;
1817 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
1818 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1819 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
1820 (unsigned long) sdata);
1821 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
1822 (unsigned long) sdata);
1823 skb_queue_head_init(&ifmgd->skb_queue);
1824
1825 ifmgd->capab = WLAN_CAPABILITY_ESS;
1826 ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN |
1827 IEEE80211_AUTH_ALG_SHARED_KEY;
1828 ifmgd->flags |= IEEE80211_STA_CREATE_IBSS |
1829 IEEE80211_STA_AUTO_BSSID_SEL |
1830 IEEE80211_STA_AUTO_CHANNEL_SEL;
1831 if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4)
1832 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
1833 }
1834
1835 /* configuration hooks */
1836 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata)
1837 {
1838 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1839 struct ieee80211_local *local = sdata->local;
1840
1841 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1842 return;
1843
1844 if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET |
1845 IEEE80211_STA_AUTO_BSSID_SEL)) &&
1846 (ifmgd->flags & (IEEE80211_STA_SSID_SET |
1847 IEEE80211_STA_AUTO_SSID_SEL))) {
1848
1849 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)
1850 ieee80211_set_disassoc(sdata, true, true,
1851 WLAN_REASON_DEAUTH_LEAVING);
1852
1853 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
1854 queue_work(local->hw.workqueue, &ifmgd->work);
1855 }
1856 }
1857
1858 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
1859 {
1860 struct ieee80211_if_managed *ifmgd;
1861
1862 if (len > IEEE80211_MAX_SSID_LEN)
1863 return -EINVAL;
1864
1865 ifmgd = &sdata->u.mgd;
1866
1867 if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) {
1868 memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid));
1869 memcpy(ifmgd->ssid, ssid, len);
1870 ifmgd->ssid_len = len;
1871 }
1872
1873 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1874
1875 if (len)
1876 ifmgd->flags |= IEEE80211_STA_SSID_SET;
1877 else
1878 ifmgd->flags &= ~IEEE80211_STA_SSID_SET;
1879
1880 return 0;
1881 }
1882
1883 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
1884 {
1885 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1886 memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len);
1887 *len = ifmgd->ssid_len;
1888 return 0;
1889 }
1890
1891 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
1892 {
1893 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1894
1895 if (is_valid_ether_addr(bssid)) {
1896 memcpy(ifmgd->bssid, bssid, ETH_ALEN);
1897 ifmgd->flags |= IEEE80211_STA_BSSID_SET;
1898 } else {
1899 memset(ifmgd->bssid, 0, ETH_ALEN);
1900 ifmgd->flags &= ~IEEE80211_STA_BSSID_SET;
1901 }
1902
1903 if (netif_running(sdata->dev)) {
1904 if (ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID)) {
1905 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
1906 "the low-level driver\n", sdata->dev->name);
1907 }
1908 }
1909
1910 return ieee80211_sta_set_ssid(sdata, ifmgd->ssid, ifmgd->ssid_len);
1911 }
1912
1913 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
1914 {
1915 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1916
1917 kfree(ifmgd->extra_ie);
1918 if (len == 0) {
1919 ifmgd->extra_ie = NULL;
1920 ifmgd->extra_ie_len = 0;
1921 return 0;
1922 }
1923 ifmgd->extra_ie = kmalloc(len, GFP_KERNEL);
1924 if (!ifmgd->extra_ie) {
1925 ifmgd->extra_ie_len = 0;
1926 return -ENOMEM;
1927 }
1928 memcpy(ifmgd->extra_ie, ie, len);
1929 ifmgd->extra_ie_len = len;
1930 return 0;
1931 }
1932
1933 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
1934 {
1935 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
1936 sdata->dev->name, reason);
1937
1938 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1939 return -EINVAL;
1940
1941 ieee80211_set_disassoc(sdata, true, true, reason);
1942 return 0;
1943 }
1944
1945 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
1946 {
1947 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1948
1949 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
1950 sdata->dev->name, reason);
1951
1952 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1953 return -EINVAL;
1954
1955 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED))
1956 return -ENOLINK;
1957
1958 ieee80211_set_disassoc(sdata, false, true, reason);
1959 return 0;
1960 }
1961
1962 /* scan finished notification */
1963 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
1964 {
1965 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
1966
1967 /* Restart STA timers */
1968 rcu_read_lock();
1969 list_for_each_entry_rcu(sdata, &local->interfaces, list)
1970 ieee80211_restart_sta_timer(sdata);
1971 rcu_read_unlock();
1972 }
1973
1974 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1975 {
1976 struct ieee80211_local *local =
1977 container_of(work, struct ieee80211_local,
1978 dynamic_ps_disable_work);
1979
1980 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1981 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1982 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1983 }
1984
1985 ieee80211_wake_queues_by_reason(&local->hw,
1986 IEEE80211_QUEUE_STOP_REASON_PS);
1987 }
1988
1989 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1990 {
1991 struct ieee80211_local *local =
1992 container_of(work, struct ieee80211_local,
1993 dynamic_ps_enable_work);
1994 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
1995
1996 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1997 return;
1998
1999 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
2000 ieee80211_send_nullfunc(local, sdata, 1);
2001
2002 local->hw.conf.flags |= IEEE80211_CONF_PS;
2003 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2004 }
2005
2006 void ieee80211_dynamic_ps_timer(unsigned long data)
2007 {
2008 struct ieee80211_local *local = (void *) data;
2009
2010 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
2011 }
2012
2013 void ieee80211_send_nullfunc(struct ieee80211_local *local,
2014 struct ieee80211_sub_if_data *sdata,
2015 int powersave)
2016 {
2017 struct sk_buff *skb;
2018 struct ieee80211_hdr *nullfunc;
2019 __le16 fc;
2020
2021 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2022 return;
2023
2024 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
2025 if (!skb) {
2026 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
2027 "frame\n", sdata->dev->name);
2028 return;
2029 }
2030 skb_reserve(skb, local->hw.extra_tx_headroom);
2031
2032 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
2033 memset(nullfunc, 0, 24);
2034 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
2035 IEEE80211_FCTL_TODS);
2036 if (powersave)
2037 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
2038 nullfunc->frame_control = fc;
2039 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2040 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
2041 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
2042
2043 ieee80211_tx_skb(sdata, skb, 0);
2044 }
Linux kernel - Deliverables
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