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Merge branch 'bkl-removal' of git://git.lwn.net/linux-2.6
[mirror_ubuntu-bionic-kernel.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 local->wmm_acm = 0;
421 for (; left >= 4; left -= 4, pos += 4) {
422 int aci = (pos[0] >> 5) & 0x03;
423 int acm = (pos[0] >> 4) & 0x01;
424 int queue;
425
426 switch (aci) {
427 case 1: /* AC_BK */
428 queue = 3;
429 if (acm)
430 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
431 break;
432 case 2: /* AC_VI */
433 queue = 1;
434 if (acm)
435 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
436 break;
437 case 3: /* AC_VO */
438 queue = 0;
439 if (acm)
440 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
441 break;
442 case 0: /* AC_BE */
443 default:
444 queue = 2;
445 if (acm)
446 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
447 break;
448 }
449
450 params.aifs = pos[0] & 0x0f;
451 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
452 params.cw_min = ecw2cw(pos[1] & 0x0f);
453 params.txop = get_unaligned_le16(pos + 2);
454 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
455 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
456 "cWmin=%d cWmax=%d txop=%d\n",
457 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
458 params.cw_max, params.txop);
459 #endif
460 if (local->ops->conf_tx &&
461 local->ops->conf_tx(local_to_hw(local), queue, &params)) {
462 printk(KERN_DEBUG "%s: failed to set TX queue "
463 "parameters for queue %d\n", local->mdev->name, queue);
464 }
465 }
466 }
467
468 static bool ieee80211_check_tim(struct ieee802_11_elems *elems, u16 aid)
469 {
470 u8 mask;
471 u8 index, indexn1, indexn2;
472 struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *) elems->tim;
473
474 aid &= 0x3fff;
475 index = aid / 8;
476 mask = 1 << (aid & 7);
477
478 indexn1 = tim->bitmap_ctrl & 0xfe;
479 indexn2 = elems->tim_len + indexn1 - 4;
480
481 if (index < indexn1 || index > indexn2)
482 return false;
483
484 index -= indexn1;
485
486 return !!(tim->virtual_map[index] & mask);
487 }
488
489 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
490 u16 capab, bool erp_valid, u8 erp)
491 {
492 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
493 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
494 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
495 #endif
496 u32 changed = 0;
497 bool use_protection;
498 bool use_short_preamble;
499 bool use_short_slot;
500
501 if (erp_valid) {
502 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
503 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
504 } else {
505 use_protection = false;
506 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
507 }
508
509 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
510
511 if (use_protection != bss_conf->use_cts_prot) {
512 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
513 if (net_ratelimit()) {
514 printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
515 sdata->dev->name,
516 use_protection ? "enabled" : "disabled",
517 ifmgd->bssid);
518 }
519 #endif
520 bss_conf->use_cts_prot = use_protection;
521 changed |= BSS_CHANGED_ERP_CTS_PROT;
522 }
523
524 if (use_short_preamble != bss_conf->use_short_preamble) {
525 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
526 if (net_ratelimit()) {
527 printk(KERN_DEBUG "%s: switched to %s barker preamble"
528 " (BSSID=%pM)\n",
529 sdata->dev->name,
530 use_short_preamble ? "short" : "long",
531 ifmgd->bssid);
532 }
533 #endif
534 bss_conf->use_short_preamble = use_short_preamble;
535 changed |= BSS_CHANGED_ERP_PREAMBLE;
536 }
537
538 if (use_short_slot != bss_conf->use_short_slot) {
539 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
540 if (net_ratelimit()) {
541 printk(KERN_DEBUG "%s: switched to %s slot time"
542 " (BSSID=%pM)\n",
543 sdata->dev->name,
544 use_short_slot ? "short" : "long",
545 ifmgd->bssid);
546 }
547 #endif
548 bss_conf->use_short_slot = use_short_slot;
549 changed |= BSS_CHANGED_ERP_SLOT;
550 }
551
552 return changed;
553 }
554
555 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata)
556 {
557 union iwreq_data wrqu;
558
559 memset(&wrqu, 0, sizeof(wrqu));
560 if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED)
561 memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN);
562 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
563 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
564 }
565
566 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata)
567 {
568 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
569 char *buf;
570 size_t len;
571 int i;
572 union iwreq_data wrqu;
573
574 if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies)
575 return;
576
577 buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len +
578 ifmgd->assocresp_ies_len), GFP_KERNEL);
579 if (!buf)
580 return;
581
582 len = sprintf(buf, "ASSOCINFO(");
583 if (ifmgd->assocreq_ies) {
584 len += sprintf(buf + len, "ReqIEs=");
585 for (i = 0; i < ifmgd->assocreq_ies_len; i++) {
586 len += sprintf(buf + len, "%02x",
587 ifmgd->assocreq_ies[i]);
588 }
589 }
590 if (ifmgd->assocresp_ies) {
591 if (ifmgd->assocreq_ies)
592 len += sprintf(buf + len, " ");
593 len += sprintf(buf + len, "RespIEs=");
594 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
595 len += sprintf(buf + len, "%02x",
596 ifmgd->assocresp_ies[i]);
597 }
598 }
599 len += sprintf(buf + len, ")");
600
601 if (len > IW_CUSTOM_MAX) {
602 len = sprintf(buf, "ASSOCRESPIE=");
603 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
604 len += sprintf(buf + len, "%02x",
605 ifmgd->assocresp_ies[i]);
606 }
607 }
608
609 if (len <= IW_CUSTOM_MAX) {
610 memset(&wrqu, 0, sizeof(wrqu));
611 wrqu.data.length = len;
612 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
613 }
614
615 kfree(buf);
616 }
617
618
619 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
620 u32 bss_info_changed)
621 {
622 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
623 struct ieee80211_local *local = sdata->local;
624 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
625
626 struct ieee80211_bss *bss;
627
628 bss_info_changed |= BSS_CHANGED_ASSOC;
629 ifmgd->flags |= IEEE80211_STA_ASSOCIATED;
630
631 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
632 conf->channel->center_freq,
633 ifmgd->ssid, ifmgd->ssid_len);
634 if (bss) {
635 /* set timing information */
636 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
637 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
638 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
639
640 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
641 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
642
643 ieee80211_rx_bss_put(local, bss);
644 }
645
646 ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET;
647 memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN);
648 ieee80211_sta_send_associnfo(sdata);
649
650 ifmgd->last_probe = jiffies;
651 ieee80211_led_assoc(local, 1);
652
653 sdata->vif.bss_conf.assoc = 1;
654 /*
655 * For now just always ask the driver to update the basic rateset
656 * when we have associated, we aren't checking whether it actually
657 * changed or not.
658 */
659 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
660 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
661
662 if (local->powersave) {
663 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) &&
664 local->hw.conf.dynamic_ps_timeout > 0) {
665 mod_timer(&local->dynamic_ps_timer, jiffies +
666 msecs_to_jiffies(
667 local->hw.conf.dynamic_ps_timeout));
668 } else {
669 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
670 ieee80211_send_nullfunc(local, sdata, 1);
671 conf->flags |= IEEE80211_CONF_PS;
672 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
673 }
674 }
675
676 netif_tx_start_all_queues(sdata->dev);
677 netif_carrier_on(sdata->dev);
678
679 ieee80211_sta_send_apinfo(sdata);
680 }
681
682 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata)
683 {
684 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
685
686 ifmgd->direct_probe_tries++;
687 if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
688 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
689 sdata->dev->name, ifmgd->bssid);
690 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
691 ieee80211_sta_send_apinfo(sdata);
692
693 /*
694 * Most likely AP is not in the range so remove the
695 * bss information associated to the AP
696 */
697 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
698 sdata->local->hw.conf.channel->center_freq,
699 ifmgd->ssid, ifmgd->ssid_len);
700 return;
701 }
702
703 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
704 sdata->dev->name, ifmgd->bssid,
705 ifmgd->direct_probe_tries);
706
707 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
708
709 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifmgd->request);
710
711 /* Direct probe is sent to broadcast address as some APs
712 * will not answer to direct packet in unassociated state.
713 */
714 ieee80211_send_probe_req(sdata, NULL,
715 ifmgd->ssid, ifmgd->ssid_len, NULL, 0);
716
717 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
718 }
719
720
721 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata)
722 {
723 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
724
725 ifmgd->auth_tries++;
726 if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
727 printk(KERN_DEBUG "%s: authentication with AP %pM"
728 " timed out\n",
729 sdata->dev->name, ifmgd->bssid);
730 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
731 ieee80211_sta_send_apinfo(sdata);
732 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
733 sdata->local->hw.conf.channel->center_freq,
734 ifmgd->ssid, ifmgd->ssid_len);
735 return;
736 }
737
738 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
739 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
740 sdata->dev->name, ifmgd->bssid);
741
742 ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, NULL, 0,
743 ifmgd->bssid, 0);
744 ifmgd->auth_transaction = 2;
745
746 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
747 }
748
749 /*
750 * The disassoc 'reason' argument can be either our own reason
751 * if self disconnected or a reason code from the AP.
752 */
753 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
754 bool deauth, bool self_disconnected,
755 u16 reason)
756 {
757 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
758 struct ieee80211_local *local = sdata->local;
759 struct sta_info *sta;
760 u32 changed = 0, config_changed = 0;
761
762 rcu_read_lock();
763
764 sta = sta_info_get(local, ifmgd->bssid);
765 if (!sta) {
766 rcu_read_unlock();
767 return;
768 }
769
770 if (deauth) {
771 ifmgd->direct_probe_tries = 0;
772 ifmgd->auth_tries = 0;
773 }
774 ifmgd->assoc_scan_tries = 0;
775 ifmgd->assoc_tries = 0;
776
777 netif_tx_stop_all_queues(sdata->dev);
778 netif_carrier_off(sdata->dev);
779
780 ieee80211_sta_tear_down_BA_sessions(sta);
781
782 if (self_disconnected) {
783 if (deauth)
784 ieee80211_send_deauth_disassoc(sdata,
785 IEEE80211_STYPE_DEAUTH, reason);
786 else
787 ieee80211_send_deauth_disassoc(sdata,
788 IEEE80211_STYPE_DISASSOC, reason);
789 }
790
791 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
792 changed |= ieee80211_reset_erp_info(sdata);
793
794 ieee80211_led_assoc(local, 0);
795 changed |= BSS_CHANGED_ASSOC;
796 sdata->vif.bss_conf.assoc = false;
797
798 ieee80211_sta_send_apinfo(sdata);
799
800 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
801 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
802 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
803 sdata->local->hw.conf.channel->center_freq,
804 ifmgd->ssid, ifmgd->ssid_len);
805 }
806
807 rcu_read_unlock();
808
809 /* channel(_type) changes are handled by ieee80211_hw_config */
810 local->oper_channel_type = NL80211_CHAN_NO_HT;
811
812 local->power_constr_level = 0;
813
814 del_timer_sync(&local->dynamic_ps_timer);
815 cancel_work_sync(&local->dynamic_ps_enable_work);
816
817 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
818 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
819 config_changed |= IEEE80211_CONF_CHANGE_PS;
820 }
821
822 ieee80211_hw_config(local, config_changed);
823 ieee80211_bss_info_change_notify(sdata, changed);
824
825 rcu_read_lock();
826
827 sta = sta_info_get(local, ifmgd->bssid);
828 if (!sta) {
829 rcu_read_unlock();
830 return;
831 }
832
833 sta_info_unlink(&sta);
834
835 rcu_read_unlock();
836
837 sta_info_destroy(sta);
838 }
839
840 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
841 {
842 if (!sdata || !sdata->default_key ||
843 sdata->default_key->conf.alg != ALG_WEP)
844 return 0;
845 return 1;
846 }
847
848 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata)
849 {
850 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
851 struct ieee80211_local *local = sdata->local;
852 struct ieee80211_bss *bss;
853 int bss_privacy;
854 int wep_privacy;
855 int privacy_invoked;
856
857 if (!ifmgd || (ifmgd->flags & IEEE80211_STA_MIXED_CELL))
858 return 0;
859
860 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
861 local->hw.conf.channel->center_freq,
862 ifmgd->ssid, ifmgd->ssid_len);
863 if (!bss)
864 return 0;
865
866 bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY);
867 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
868 privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED);
869
870 ieee80211_rx_bss_put(local, bss);
871
872 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
873 return 0;
874
875 return 1;
876 }
877
878 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata)
879 {
880 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
881
882 ifmgd->assoc_tries++;
883 if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
884 printk(KERN_DEBUG "%s: association with AP %pM"
885 " timed out\n",
886 sdata->dev->name, ifmgd->bssid);
887 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
888 ieee80211_sta_send_apinfo(sdata);
889 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
890 sdata->local->hw.conf.channel->center_freq,
891 ifmgd->ssid, ifmgd->ssid_len);
892 return;
893 }
894
895 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
896 printk(KERN_DEBUG "%s: associate with AP %pM\n",
897 sdata->dev->name, ifmgd->bssid);
898 if (ieee80211_privacy_mismatch(sdata)) {
899 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
900 "mixed-cell disabled - abort association\n", sdata->dev->name);
901 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
902 return;
903 }
904
905 ieee80211_send_assoc(sdata);
906
907 mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
908 }
909
910
911 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
912 {
913 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
914 struct ieee80211_local *local = sdata->local;
915 struct sta_info *sta;
916 int disassoc;
917
918 /* TODO: start monitoring current AP signal quality and number of
919 * missed beacons. Scan other channels every now and then and search
920 * for better APs. */
921 /* TODO: remove expired BSSes */
922
923 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED;
924
925 rcu_read_lock();
926
927 sta = sta_info_get(local, ifmgd->bssid);
928 if (!sta) {
929 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
930 sdata->dev->name, ifmgd->bssid);
931 disassoc = 1;
932 } else {
933 disassoc = 0;
934 if (time_after(jiffies,
935 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
936 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) {
937 printk(KERN_DEBUG "%s: No ProbeResp from "
938 "current AP %pM - assume out of "
939 "range\n",
940 sdata->dev->name, ifmgd->bssid);
941 disassoc = 1;
942 } else
943 ieee80211_send_probe_req(sdata, ifmgd->bssid,
944 ifmgd->ssid,
945 ifmgd->ssid_len,
946 NULL, 0);
947 ifmgd->flags ^= IEEE80211_STA_PROBEREQ_POLL;
948 } else {
949 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
950 if (time_after(jiffies, ifmgd->last_probe +
951 IEEE80211_PROBE_INTERVAL)) {
952 ifmgd->last_probe = jiffies;
953 ieee80211_send_probe_req(sdata, ifmgd->bssid,
954 ifmgd->ssid,
955 ifmgd->ssid_len,
956 NULL, 0);
957 }
958 }
959 }
960
961 rcu_read_unlock();
962
963 if (disassoc)
964 ieee80211_set_disassoc(sdata, true, true,
965 WLAN_REASON_PREV_AUTH_NOT_VALID);
966 else
967 mod_timer(&ifmgd->timer, jiffies +
968 IEEE80211_MONITORING_INTERVAL);
969 }
970
971
972 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata)
973 {
974 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
975
976 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
977 ifmgd->flags |= IEEE80211_STA_AUTHENTICATED;
978 ieee80211_associate(sdata);
979 }
980
981
982 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
983 struct ieee80211_mgmt *mgmt,
984 size_t len)
985 {
986 u8 *pos;
987 struct ieee802_11_elems elems;
988
989 pos = mgmt->u.auth.variable;
990 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
991 if (!elems.challenge)
992 return;
993 ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg,
994 elems.challenge - 2, elems.challenge_len + 2,
995 sdata->u.mgd.bssid, 1);
996 sdata->u.mgd.auth_transaction = 4;
997 }
998
999 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1000 struct ieee80211_mgmt *mgmt,
1001 size_t len)
1002 {
1003 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1004 u16 auth_alg, auth_transaction, status_code;
1005
1006 if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE)
1007 return;
1008
1009 if (len < 24 + 6)
1010 return;
1011
1012 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1013 return;
1014
1015 if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1016 return;
1017
1018 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1019 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1020 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1021
1022 if (auth_alg != ifmgd->auth_alg ||
1023 auth_transaction != ifmgd->auth_transaction)
1024 return;
1025
1026 if (status_code != WLAN_STATUS_SUCCESS) {
1027 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1028 u8 algs[3];
1029 const int num_algs = ARRAY_SIZE(algs);
1030 int i, pos;
1031 algs[0] = algs[1] = algs[2] = 0xff;
1032 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1033 algs[0] = WLAN_AUTH_OPEN;
1034 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1035 algs[1] = WLAN_AUTH_SHARED_KEY;
1036 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1037 algs[2] = WLAN_AUTH_LEAP;
1038 if (ifmgd->auth_alg == WLAN_AUTH_OPEN)
1039 pos = 0;
1040 else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY)
1041 pos = 1;
1042 else
1043 pos = 2;
1044 for (i = 0; i < num_algs; i++) {
1045 pos++;
1046 if (pos >= num_algs)
1047 pos = 0;
1048 if (algs[pos] == ifmgd->auth_alg ||
1049 algs[pos] == 0xff)
1050 continue;
1051 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1052 !ieee80211_sta_wep_configured(sdata))
1053 continue;
1054 ifmgd->auth_alg = algs[pos];
1055 break;
1056 }
1057 }
1058 return;
1059 }
1060
1061 switch (ifmgd->auth_alg) {
1062 case WLAN_AUTH_OPEN:
1063 case WLAN_AUTH_LEAP:
1064 ieee80211_auth_completed(sdata);
1065 break;
1066 case WLAN_AUTH_SHARED_KEY:
1067 if (ifmgd->auth_transaction == 4)
1068 ieee80211_auth_completed(sdata);
1069 else
1070 ieee80211_auth_challenge(sdata, mgmt, len);
1071 break;
1072 }
1073 }
1074
1075
1076 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1077 struct ieee80211_mgmt *mgmt,
1078 size_t len)
1079 {
1080 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1081 u16 reason_code;
1082
1083 if (len < 24 + 2)
1084 return;
1085
1086 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1087 return;
1088
1089 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1090
1091 if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED)
1092 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1093 sdata->dev->name, reason_code);
1094
1095 if (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1096 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE ||
1097 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1098 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1099 mod_timer(&ifmgd->timer, jiffies +
1100 IEEE80211_RETRY_AUTH_INTERVAL);
1101 }
1102
1103 ieee80211_set_disassoc(sdata, true, false, 0);
1104 ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED;
1105 }
1106
1107
1108 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1109 struct ieee80211_mgmt *mgmt,
1110 size_t len)
1111 {
1112 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1113 u16 reason_code;
1114
1115 if (len < 24 + 2)
1116 return;
1117
1118 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1119 return;
1120
1121 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1122
1123 if (ifmgd->flags & IEEE80211_STA_ASSOCIATED)
1124 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1125 sdata->dev->name, reason_code);
1126
1127 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1128 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1129 mod_timer(&ifmgd->timer, jiffies +
1130 IEEE80211_RETRY_AUTH_INTERVAL);
1131 }
1132
1133 ieee80211_set_disassoc(sdata, false, false, reason_code);
1134 }
1135
1136
1137 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1138 struct ieee80211_mgmt *mgmt,
1139 size_t len,
1140 int reassoc)
1141 {
1142 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1143 struct ieee80211_local *local = sdata->local;
1144 struct ieee80211_supported_band *sband;
1145 struct sta_info *sta;
1146 u32 rates, basic_rates;
1147 u16 capab_info, status_code, aid;
1148 struct ieee802_11_elems elems;
1149 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1150 u8 *pos;
1151 u32 changed = 0;
1152 int i, j;
1153 bool have_higher_than_11mbit = false, newsta = false;
1154 u16 ap_ht_cap_flags;
1155
1156 /* AssocResp and ReassocResp have identical structure, so process both
1157 * of them in this function. */
1158
1159 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1160 return;
1161
1162 if (len < 24 + 6)
1163 return;
1164
1165 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1166 return;
1167
1168 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1169 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1170 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1171
1172 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1173 "status=%d aid=%d)\n",
1174 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1175 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1176
1177 pos = mgmt->u.assoc_resp.variable;
1178 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1179
1180 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1181 elems.timeout_int && elems.timeout_int_len == 5 &&
1182 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1183 u32 tu, ms;
1184 tu = get_unaligned_le32(elems.timeout_int + 1);
1185 ms = tu * 1024 / 1000;
1186 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1187 "comeback duration %u TU (%u ms)\n",
1188 sdata->dev->name, tu, ms);
1189 if (ms > IEEE80211_ASSOC_TIMEOUT)
1190 mod_timer(&ifmgd->timer,
1191 jiffies + msecs_to_jiffies(ms));
1192 return;
1193 }
1194
1195 if (status_code != WLAN_STATUS_SUCCESS) {
1196 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1197 sdata->dev->name, status_code);
1198 /* if this was a reassociation, ensure we try a "full"
1199 * association next time. This works around some broken APs
1200 * which do not correctly reject reassociation requests. */
1201 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1202 return;
1203 }
1204
1205 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1206 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1207 "set\n", sdata->dev->name, aid);
1208 aid &= ~(BIT(15) | BIT(14));
1209
1210 if (!elems.supp_rates) {
1211 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1212 sdata->dev->name);
1213 return;
1214 }
1215
1216 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1217 ifmgd->aid = aid;
1218 ifmgd->ap_capab = capab_info;
1219
1220 kfree(ifmgd->assocresp_ies);
1221 ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1222 ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL);
1223 if (ifmgd->assocresp_ies)
1224 memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len);
1225
1226 rcu_read_lock();
1227
1228 /* Add STA entry for the AP */
1229 sta = sta_info_get(local, ifmgd->bssid);
1230 if (!sta) {
1231 newsta = true;
1232
1233 sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC);
1234 if (!sta) {
1235 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1236 " the AP\n", sdata->dev->name);
1237 rcu_read_unlock();
1238 return;
1239 }
1240
1241 /* update new sta with its last rx activity */
1242 sta->last_rx = jiffies;
1243 }
1244
1245 /*
1246 * FIXME: Do we really need to update the sta_info's information here?
1247 * We already know about the AP (we found it in our list) so it
1248 * should already be filled with the right info, no?
1249 * As is stands, all this is racy because typically we assume
1250 * the information that is filled in here (except flags) doesn't
1251 * change while a STA structure is alive. As such, it should move
1252 * to between the sta_info_alloc() and sta_info_insert() above.
1253 */
1254
1255 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1256 WLAN_STA_AUTHORIZED);
1257
1258 rates = 0;
1259 basic_rates = 0;
1260 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1261
1262 for (i = 0; i < elems.supp_rates_len; i++) {
1263 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1264 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1265
1266 if (rate > 110)
1267 have_higher_than_11mbit = true;
1268
1269 for (j = 0; j < sband->n_bitrates; j++) {
1270 if (sband->bitrates[j].bitrate == rate) {
1271 rates |= BIT(j);
1272 if (is_basic)
1273 basic_rates |= BIT(j);
1274 break;
1275 }
1276 }
1277 }
1278
1279 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1280 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1281 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1282
1283 if (rate > 110)
1284 have_higher_than_11mbit = true;
1285
1286 for (j = 0; j < sband->n_bitrates; j++) {
1287 if (sband->bitrates[j].bitrate == rate) {
1288 rates |= BIT(j);
1289 if (is_basic)
1290 basic_rates |= BIT(j);
1291 break;
1292 }
1293 }
1294 }
1295
1296 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1297 sdata->vif.bss_conf.basic_rates = basic_rates;
1298
1299 /* cf. IEEE 802.11 9.2.12 */
1300 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1301 have_higher_than_11mbit)
1302 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1303 else
1304 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1305
1306 /* If TKIP/WEP is used, no need to parse AP's HT capabilities */
1307 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1308 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1309 elems.ht_cap_elem, &sta->sta.ht_cap);
1310
1311 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1312
1313 rate_control_rate_init(sta);
1314
1315 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1316 set_sta_flags(sta, WLAN_STA_MFP);
1317
1318 if (elems.wmm_param)
1319 set_sta_flags(sta, WLAN_STA_WME);
1320
1321 if (newsta) {
1322 int err = sta_info_insert(sta);
1323 if (err) {
1324 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1325 " the AP (error %d)\n", sdata->dev->name, err);
1326 rcu_read_unlock();
1327 return;
1328 }
1329 }
1330
1331 rcu_read_unlock();
1332
1333 if (elems.wmm_param)
1334 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1335 elems.wmm_param_len);
1336
1337 if (elems.ht_info_elem && elems.wmm_param &&
1338 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1339 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1340 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1341 ap_ht_cap_flags);
1342
1343 /* set AID and assoc capability,
1344 * ieee80211_set_associated() will tell the driver */
1345 bss_conf->aid = aid;
1346 bss_conf->assoc_capability = capab_info;
1347 ieee80211_set_associated(sdata, changed);
1348
1349 ieee80211_associated(sdata);
1350 }
1351
1352
1353 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1354 struct ieee80211_mgmt *mgmt,
1355 size_t len,
1356 struct ieee80211_rx_status *rx_status,
1357 struct ieee802_11_elems *elems,
1358 bool beacon)
1359 {
1360 struct ieee80211_local *local = sdata->local;
1361 int freq;
1362 struct ieee80211_bss *bss;
1363 struct ieee80211_channel *channel;
1364
1365 if (elems->ds_params && elems->ds_params_len == 1)
1366 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1367 else
1368 freq = rx_status->freq;
1369
1370 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1371
1372 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1373 return;
1374
1375 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1376 channel, beacon);
1377 if (!bss)
1378 return;
1379
1380 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1381 (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) {
1382 struct ieee80211_channel_sw_ie *sw_elem =
1383 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1384 ieee80211_process_chanswitch(sdata, sw_elem, bss);
1385 }
1386
1387 ieee80211_rx_bss_put(local, bss);
1388 }
1389
1390
1391 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1392 struct ieee80211_mgmt *mgmt,
1393 size_t len,
1394 struct ieee80211_rx_status *rx_status)
1395 {
1396 size_t baselen;
1397 struct ieee802_11_elems elems;
1398
1399 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1400 return; /* ignore ProbeResp to foreign address */
1401
1402 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1403 if (baselen > len)
1404 return;
1405
1406 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1407 &elems);
1408
1409 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1410
1411 /* direct probe may be part of the association flow */
1412 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1413 &sdata->u.mgd.request)) {
1414 printk(KERN_DEBUG "%s direct probe responded\n",
1415 sdata->dev->name);
1416 ieee80211_authenticate(sdata);
1417 }
1418 }
1419
1420 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1421 struct ieee80211_mgmt *mgmt,
1422 size_t len,
1423 struct ieee80211_rx_status *rx_status)
1424 {
1425 struct ieee80211_if_managed *ifmgd;
1426 size_t baselen;
1427 struct ieee802_11_elems elems;
1428 struct ieee80211_local *local = sdata->local;
1429 u32 changed = 0;
1430 bool erp_valid, directed_tim;
1431 u8 erp_value = 0;
1432
1433 /* Process beacon from the current BSS */
1434 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1435 if (baselen > len)
1436 return;
1437
1438 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1439
1440 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
1441
1442 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1443 return;
1444
1445 ifmgd = &sdata->u.mgd;
1446
1447 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) ||
1448 memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1449 return;
1450
1451 if (rx_status->freq != local->hw.conf.channel->center_freq)
1452 return;
1453
1454 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1455 elems.wmm_param_len);
1456
1457 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1458 directed_tim = ieee80211_check_tim(&elems, ifmgd->aid);
1459
1460 if (directed_tim) {
1461 if (local->hw.conf.dynamic_ps_timeout > 0) {
1462 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1463 ieee80211_hw_config(local,
1464 IEEE80211_CONF_CHANGE_PS);
1465 ieee80211_send_nullfunc(local, sdata, 0);
1466 } else {
1467 local->pspolling = true;
1468
1469 /*
1470 * Here is assumed that the driver will be
1471 * able to send ps-poll frame and receive a
1472 * response even though power save mode is
1473 * enabled, but some drivers might require
1474 * to disable power save here. This needs
1475 * to be investigated.
1476 */
1477 ieee80211_send_pspoll(local, sdata);
1478 }
1479 }
1480 }
1481
1482 if (elems.erp_info && elems.erp_info_len >= 1) {
1483 erp_valid = true;
1484 erp_value = elems.erp_info[0];
1485 } else {
1486 erp_valid = false;
1487 }
1488 changed |= ieee80211_handle_bss_capability(sdata,
1489 le16_to_cpu(mgmt->u.beacon.capab_info),
1490 erp_valid, erp_value);
1491
1492
1493 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1494 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) {
1495 struct sta_info *sta;
1496 struct ieee80211_supported_band *sband;
1497 u16 ap_ht_cap_flags;
1498
1499 rcu_read_lock();
1500
1501 sta = sta_info_get(local, ifmgd->bssid);
1502 if (!sta) {
1503 rcu_read_unlock();
1504 return;
1505 }
1506
1507 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1508
1509 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1510 elems.ht_cap_elem, &sta->sta.ht_cap);
1511
1512 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1513
1514 rcu_read_unlock();
1515
1516 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1517 ap_ht_cap_flags);
1518 }
1519
1520 if (elems.country_elem) {
1521 /* Note we are only reviewing this on beacons
1522 * for the BSSID we are associated to */
1523 regulatory_hint_11d(local->hw.wiphy,
1524 elems.country_elem, elems.country_elem_len);
1525
1526 /* TODO: IBSS also needs this */
1527 if (elems.pwr_constr_elem)
1528 ieee80211_handle_pwr_constr(sdata,
1529 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1530 elems.pwr_constr_elem,
1531 elems.pwr_constr_elem_len);
1532 }
1533
1534 ieee80211_bss_info_change_notify(sdata, changed);
1535 }
1536
1537 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1538 struct sk_buff *skb,
1539 struct ieee80211_rx_status *rx_status)
1540 {
1541 struct ieee80211_local *local = sdata->local;
1542 struct ieee80211_mgmt *mgmt;
1543 u16 fc;
1544
1545 if (skb->len < 24)
1546 return RX_DROP_MONITOR;
1547
1548 mgmt = (struct ieee80211_mgmt *) skb->data;
1549 fc = le16_to_cpu(mgmt->frame_control);
1550
1551 switch (fc & IEEE80211_FCTL_STYPE) {
1552 case IEEE80211_STYPE_PROBE_REQ:
1553 case IEEE80211_STYPE_PROBE_RESP:
1554 case IEEE80211_STYPE_BEACON:
1555 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1556 case IEEE80211_STYPE_AUTH:
1557 case IEEE80211_STYPE_ASSOC_RESP:
1558 case IEEE80211_STYPE_REASSOC_RESP:
1559 case IEEE80211_STYPE_DEAUTH:
1560 case IEEE80211_STYPE_DISASSOC:
1561 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1562 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
1563 return RX_QUEUED;
1564 }
1565
1566 return RX_DROP_MONITOR;
1567 }
1568
1569 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1570 struct sk_buff *skb)
1571 {
1572 struct ieee80211_rx_status *rx_status;
1573 struct ieee80211_mgmt *mgmt;
1574 u16 fc;
1575
1576 rx_status = (struct ieee80211_rx_status *) skb->cb;
1577 mgmt = (struct ieee80211_mgmt *) skb->data;
1578 fc = le16_to_cpu(mgmt->frame_control);
1579
1580 switch (fc & IEEE80211_FCTL_STYPE) {
1581 case IEEE80211_STYPE_PROBE_RESP:
1582 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
1583 rx_status);
1584 break;
1585 case IEEE80211_STYPE_BEACON:
1586 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1587 rx_status);
1588 break;
1589 case IEEE80211_STYPE_AUTH:
1590 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
1591 break;
1592 case IEEE80211_STYPE_ASSOC_RESP:
1593 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0);
1594 break;
1595 case IEEE80211_STYPE_REASSOC_RESP:
1596 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1);
1597 break;
1598 case IEEE80211_STYPE_DEAUTH:
1599 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1600 break;
1601 case IEEE80211_STYPE_DISASSOC:
1602 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1603 break;
1604 }
1605
1606 kfree_skb(skb);
1607 }
1608
1609 static void ieee80211_sta_timer(unsigned long data)
1610 {
1611 struct ieee80211_sub_if_data *sdata =
1612 (struct ieee80211_sub_if_data *) data;
1613 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1614 struct ieee80211_local *local = sdata->local;
1615
1616 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1617 queue_work(local->hw.workqueue, &ifmgd->work);
1618 }
1619
1620 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata)
1621 {
1622 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1623 struct ieee80211_local *local = sdata->local;
1624
1625 if (local->ops->reset_tsf) {
1626 /* Reset own TSF to allow time synchronization work. */
1627 local->ops->reset_tsf(local_to_hw(local));
1628 }
1629
1630 ifmgd->wmm_last_param_set = -1; /* allow any WMM update */
1631
1632
1633 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1634 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1635 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1636 ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY;
1637 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1638 ifmgd->auth_alg = WLAN_AUTH_LEAP;
1639 else
1640 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1641 ifmgd->auth_transaction = -1;
1642 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
1643 ifmgd->assoc_scan_tries = 0;
1644 ifmgd->direct_probe_tries = 0;
1645 ifmgd->auth_tries = 0;
1646 ifmgd->assoc_tries = 0;
1647 netif_tx_stop_all_queues(sdata->dev);
1648 netif_carrier_off(sdata->dev);
1649 }
1650
1651 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata)
1652 {
1653 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1654 struct ieee80211_local *local = sdata->local;
1655 struct ieee80211_bss *bss;
1656 u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid;
1657 u8 ssid_len = ifmgd->ssid_len;
1658 u16 capa_mask = WLAN_CAPABILITY_ESS;
1659 u16 capa_val = WLAN_CAPABILITY_ESS;
1660 struct ieee80211_channel *chan = local->oper_channel;
1661
1662 if (ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL |
1663 IEEE80211_STA_AUTO_BSSID_SEL |
1664 IEEE80211_STA_AUTO_CHANNEL_SEL)) {
1665 capa_mask |= WLAN_CAPABILITY_PRIVACY;
1666 if (sdata->default_key)
1667 capa_val |= WLAN_CAPABILITY_PRIVACY;
1668 }
1669
1670 if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
1671 chan = NULL;
1672
1673 if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL)
1674 bssid = NULL;
1675
1676 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) {
1677 ssid = NULL;
1678 ssid_len = 0;
1679 }
1680
1681 bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
1682 bssid, ssid, ssid_len,
1683 capa_mask, capa_val);
1684
1685 if (bss) {
1686 ieee80211_set_freq(sdata, bss->cbss.channel->center_freq);
1687 if (!(ifmgd->flags & IEEE80211_STA_SSID_SET))
1688 ieee80211_sta_set_ssid(sdata, bss->ssid,
1689 bss->ssid_len);
1690 ieee80211_sta_set_bssid(sdata, bss->cbss.bssid);
1691 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
1692 bss->supp_rates);
1693 if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED)
1694 sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED;
1695 else
1696 sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED;
1697
1698 /* Send out direct probe if no probe resp was received or
1699 * the one we have is outdated
1700 */
1701 if (!bss->last_probe_resp ||
1702 time_after(jiffies, bss->last_probe_resp
1703 + IEEE80211_SCAN_RESULT_EXPIRE))
1704 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1705 else
1706 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
1707
1708 ieee80211_rx_bss_put(local, bss);
1709 ieee80211_sta_reset_auth(sdata);
1710 return 0;
1711 } else {
1712 if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
1713 ifmgd->assoc_scan_tries++;
1714 /* XXX maybe racy? */
1715 if (local->scan_req)
1716 return -1;
1717 memcpy(local->int_scan_req.ssids[0].ssid,
1718 ifmgd->ssid, IEEE80211_MAX_SSID_LEN);
1719 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL)
1720 local->int_scan_req.ssids[0].ssid_len = 0;
1721 else
1722 local->int_scan_req.ssids[0].ssid_len = ifmgd->ssid_len;
1723
1724 if (ieee80211_start_scan(sdata, &local->int_scan_req))
1725 ieee80211_scan_failed(local);
1726
1727 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
1728 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
1729 } else {
1730 ifmgd->assoc_scan_tries = 0;
1731 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1732 }
1733 }
1734 return -1;
1735 }
1736
1737
1738 static void ieee80211_sta_work(struct work_struct *work)
1739 {
1740 struct ieee80211_sub_if_data *sdata =
1741 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
1742 struct ieee80211_local *local = sdata->local;
1743 struct ieee80211_if_managed *ifmgd;
1744 struct sk_buff *skb;
1745
1746 if (!netif_running(sdata->dev))
1747 return;
1748
1749 if (local->sw_scanning || local->hw_scanning)
1750 return;
1751
1752 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1753 return;
1754 ifmgd = &sdata->u.mgd;
1755
1756 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
1757 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1758
1759 if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
1760 ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE &&
1761 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE &&
1762 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) {
1763 /*
1764 * The call to ieee80211_start_scan can fail but ieee80211_request_scan
1765 * (which queued ieee80211_sta_work) did not return an error. Thus, call
1766 * ieee80211_scan_failed here if ieee80211_start_scan fails in order to
1767 * notify the scan requester.
1768 */
1769 if (ieee80211_start_scan(sdata, local->scan_req))
1770 ieee80211_scan_failed(local);
1771 return;
1772 }
1773
1774 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) {
1775 if (ieee80211_sta_config_auth(sdata))
1776 return;
1777 clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1778 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request))
1779 return;
1780
1781 switch (ifmgd->state) {
1782 case IEEE80211_STA_MLME_DISABLED:
1783 break;
1784 case IEEE80211_STA_MLME_DIRECT_PROBE:
1785 ieee80211_direct_probe(sdata);
1786 break;
1787 case IEEE80211_STA_MLME_AUTHENTICATE:
1788 ieee80211_authenticate(sdata);
1789 break;
1790 case IEEE80211_STA_MLME_ASSOCIATE:
1791 ieee80211_associate(sdata);
1792 break;
1793 case IEEE80211_STA_MLME_ASSOCIATED:
1794 ieee80211_associated(sdata);
1795 break;
1796 default:
1797 WARN_ON(1);
1798 break;
1799 }
1800
1801 if (ieee80211_privacy_mismatch(sdata)) {
1802 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
1803 "mixed-cell disabled - disassociate\n", sdata->dev->name);
1804
1805 ieee80211_set_disassoc(sdata, false, true,
1806 WLAN_REASON_UNSPECIFIED);
1807 }
1808 }
1809
1810 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
1811 {
1812 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1813 queue_work(sdata->local->hw.workqueue,
1814 &sdata->u.mgd.work);
1815 }
1816
1817 /* interface setup */
1818 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
1819 {
1820 struct ieee80211_if_managed *ifmgd;
1821
1822 ifmgd = &sdata->u.mgd;
1823 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
1824 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1825 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
1826 (unsigned long) sdata);
1827 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
1828 (unsigned long) sdata);
1829 skb_queue_head_init(&ifmgd->skb_queue);
1830
1831 ifmgd->capab = WLAN_CAPABILITY_ESS;
1832 ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN |
1833 IEEE80211_AUTH_ALG_SHARED_KEY;
1834 ifmgd->flags |= IEEE80211_STA_CREATE_IBSS |
1835 IEEE80211_STA_AUTO_BSSID_SEL |
1836 IEEE80211_STA_AUTO_CHANNEL_SEL;
1837 if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4)
1838 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
1839 }
1840
1841 /* configuration hooks */
1842 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata)
1843 {
1844 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1845 struct ieee80211_local *local = sdata->local;
1846
1847 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1848 return;
1849
1850 if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET |
1851 IEEE80211_STA_AUTO_BSSID_SEL)) &&
1852 (ifmgd->flags & (IEEE80211_STA_SSID_SET |
1853 IEEE80211_STA_AUTO_SSID_SEL))) {
1854
1855 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)
1856 ieee80211_set_disassoc(sdata, true, true,
1857 WLAN_REASON_DEAUTH_LEAVING);
1858
1859 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
1860 queue_work(local->hw.workqueue, &ifmgd->work);
1861 }
1862 }
1863
1864 int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata)
1865 {
1866 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1867
1868 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1869
1870 if (ifmgd->ssid_len)
1871 ifmgd->flags |= IEEE80211_STA_SSID_SET;
1872 else
1873 ifmgd->flags &= ~IEEE80211_STA_SSID_SET;
1874
1875 return 0;
1876 }
1877
1878 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
1879 {
1880 struct ieee80211_if_managed *ifmgd;
1881
1882 if (len > IEEE80211_MAX_SSID_LEN)
1883 return -EINVAL;
1884
1885 ifmgd = &sdata->u.mgd;
1886
1887 if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) {
1888 memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid));
1889 memcpy(ifmgd->ssid, ssid, len);
1890 ifmgd->ssid_len = len;
1891 }
1892
1893 return ieee80211_sta_commit(sdata);
1894 }
1895
1896 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
1897 {
1898 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1899 memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len);
1900 *len = ifmgd->ssid_len;
1901 return 0;
1902 }
1903
1904 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
1905 {
1906 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1907
1908 if (is_valid_ether_addr(bssid)) {
1909 memcpy(ifmgd->bssid, bssid, ETH_ALEN);
1910 ifmgd->flags |= IEEE80211_STA_BSSID_SET;
1911 } else {
1912 memset(ifmgd->bssid, 0, ETH_ALEN);
1913 ifmgd->flags &= ~IEEE80211_STA_BSSID_SET;
1914 }
1915
1916 if (netif_running(sdata->dev)) {
1917 if (ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID)) {
1918 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
1919 "the low-level driver\n", sdata->dev->name);
1920 }
1921 }
1922
1923 return ieee80211_sta_commit(sdata);
1924 }
1925
1926 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
1927 {
1928 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1929
1930 kfree(ifmgd->extra_ie);
1931 if (len == 0) {
1932 ifmgd->extra_ie = NULL;
1933 ifmgd->extra_ie_len = 0;
1934 return 0;
1935 }
1936 ifmgd->extra_ie = kmalloc(len, GFP_KERNEL);
1937 if (!ifmgd->extra_ie) {
1938 ifmgd->extra_ie_len = 0;
1939 return -ENOMEM;
1940 }
1941 memcpy(ifmgd->extra_ie, ie, len);
1942 ifmgd->extra_ie_len = len;
1943 return 0;
1944 }
1945
1946 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
1947 {
1948 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
1949 sdata->dev->name, reason);
1950
1951 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1952 return -EINVAL;
1953
1954 ieee80211_set_disassoc(sdata, true, true, reason);
1955 return 0;
1956 }
1957
1958 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
1959 {
1960 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1961
1962 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
1963 sdata->dev->name, reason);
1964
1965 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1966 return -EINVAL;
1967
1968 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED))
1969 return -ENOLINK;
1970
1971 ieee80211_set_disassoc(sdata, false, true, reason);
1972 return 0;
1973 }
1974
1975 /* scan finished notification */
1976 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
1977 {
1978 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
1979
1980 /* Restart STA timers */
1981 rcu_read_lock();
1982 list_for_each_entry_rcu(sdata, &local->interfaces, list)
1983 ieee80211_restart_sta_timer(sdata);
1984 rcu_read_unlock();
1985 }
1986
1987 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1988 {
1989 struct ieee80211_local *local =
1990 container_of(work, struct ieee80211_local,
1991 dynamic_ps_disable_work);
1992
1993 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1994 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1995 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1996 }
1997
1998 ieee80211_wake_queues_by_reason(&local->hw,
1999 IEEE80211_QUEUE_STOP_REASON_PS);
2000 }
2001
2002 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
2003 {
2004 struct ieee80211_local *local =
2005 container_of(work, struct ieee80211_local,
2006 dynamic_ps_enable_work);
2007 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2008
2009 if (local->hw.conf.flags & IEEE80211_CONF_PS)
2010 return;
2011
2012 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
2013 ieee80211_send_nullfunc(local, sdata, 1);
2014
2015 local->hw.conf.flags |= IEEE80211_CONF_PS;
2016 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2017 }
2018
2019 void ieee80211_dynamic_ps_timer(unsigned long data)
2020 {
2021 struct ieee80211_local *local = (void *) data;
2022
2023 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
2024 }
2025
2026 void ieee80211_send_nullfunc(struct ieee80211_local *local,
2027 struct ieee80211_sub_if_data *sdata,
2028 int powersave)
2029 {
2030 struct sk_buff *skb;
2031 struct ieee80211_hdr *nullfunc;
2032 __le16 fc;
2033
2034 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2035 return;
2036
2037 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
2038 if (!skb) {
2039 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
2040 "frame\n", sdata->dev->name);
2041 return;
2042 }
2043 skb_reserve(skb, local->hw.extra_tx_headroom);
2044
2045 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
2046 memset(nullfunc, 0, 24);
2047 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
2048 IEEE80211_FCTL_TODS);
2049 if (powersave)
2050 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
2051 nullfunc->frame_control = fc;
2052 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2053 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
2054 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
2055
2056 ieee80211_tx_skb(sdata, skb, 0);
2057 }
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