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mac80211: Fix reassociation by not clearing previous BSSID
[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_STA_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 struct ieee80211_local *local = sdata->local;
686
687 ifmgd->direct_probe_tries++;
688 if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
689 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
690 sdata->dev->name, ifmgd->bssid);
691 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
692 ieee80211_sta_send_apinfo(sdata);
693
694 /*
695 * Most likely AP is not in the range so remove the
696 * bss information associated to the AP
697 */
698 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
699 sdata->local->hw.conf.channel->center_freq,
700 ifmgd->ssid, ifmgd->ssid_len);
701
702 /*
703 * We might have a pending scan which had no chance to run yet
704 * due to state == IEEE80211_STA_MLME_DIRECT_PROBE.
705 * Hence, queue the STAs work again
706 */
707 queue_work(local->hw.workqueue, &ifmgd->work);
708 return;
709 }
710
711 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
712 sdata->dev->name, ifmgd->bssid,
713 ifmgd->direct_probe_tries);
714
715 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
716
717 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifmgd->request);
718
719 /* Direct probe is sent to broadcast address as some APs
720 * will not answer to direct packet in unassociated state.
721 */
722 ieee80211_send_probe_req(sdata, NULL,
723 ifmgd->ssid, ifmgd->ssid_len, NULL, 0);
724
725 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
726 }
727
728
729 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata)
730 {
731 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
732 struct ieee80211_local *local = sdata->local;
733
734 ifmgd->auth_tries++;
735 if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
736 printk(KERN_DEBUG "%s: authentication with AP %pM"
737 " timed out\n",
738 sdata->dev->name, ifmgd->bssid);
739 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
740 ieee80211_sta_send_apinfo(sdata);
741 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
742 sdata->local->hw.conf.channel->center_freq,
743 ifmgd->ssid, ifmgd->ssid_len);
744
745 /*
746 * We might have a pending scan which had no chance to run yet
747 * due to state == IEEE80211_STA_MLME_AUTHENTICATE.
748 * Hence, queue the STAs work again
749 */
750 queue_work(local->hw.workqueue, &ifmgd->work);
751 return;
752 }
753
754 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
755 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
756 sdata->dev->name, ifmgd->bssid);
757
758 ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, NULL, 0,
759 ifmgd->bssid, 0);
760 ifmgd->auth_transaction = 2;
761
762 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
763 }
764
765 /*
766 * The disassoc 'reason' argument can be either our own reason
767 * if self disconnected or a reason code from the AP.
768 */
769 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
770 bool deauth, bool self_disconnected,
771 u16 reason)
772 {
773 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
774 struct ieee80211_local *local = sdata->local;
775 struct sta_info *sta;
776 u32 changed = 0, config_changed = 0;
777
778 rcu_read_lock();
779
780 sta = sta_info_get(local, ifmgd->bssid);
781 if (!sta) {
782 rcu_read_unlock();
783 return;
784 }
785
786 if (deauth) {
787 ifmgd->direct_probe_tries = 0;
788 ifmgd->auth_tries = 0;
789 }
790 ifmgd->assoc_scan_tries = 0;
791 ifmgd->assoc_tries = 0;
792
793 netif_tx_stop_all_queues(sdata->dev);
794 netif_carrier_off(sdata->dev);
795
796 ieee80211_sta_tear_down_BA_sessions(sta);
797
798 if (self_disconnected) {
799 if (deauth)
800 ieee80211_send_deauth_disassoc(sdata,
801 IEEE80211_STYPE_DEAUTH, reason);
802 else
803 ieee80211_send_deauth_disassoc(sdata,
804 IEEE80211_STYPE_DISASSOC, reason);
805 }
806
807 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
808 changed |= ieee80211_reset_erp_info(sdata);
809
810 ieee80211_led_assoc(local, 0);
811 changed |= BSS_CHANGED_ASSOC;
812 sdata->vif.bss_conf.assoc = false;
813
814 ieee80211_sta_send_apinfo(sdata);
815
816 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
817 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
818 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
819 sdata->local->hw.conf.channel->center_freq,
820 ifmgd->ssid, ifmgd->ssid_len);
821 }
822
823 rcu_read_unlock();
824
825 /* channel(_type) changes are handled by ieee80211_hw_config */
826 local->oper_channel_type = NL80211_CHAN_NO_HT;
827
828 local->power_constr_level = 0;
829
830 del_timer_sync(&local->dynamic_ps_timer);
831 cancel_work_sync(&local->dynamic_ps_enable_work);
832
833 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
834 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
835 config_changed |= IEEE80211_CONF_CHANGE_PS;
836 }
837
838 ieee80211_hw_config(local, config_changed);
839 ieee80211_bss_info_change_notify(sdata, changed);
840
841 rcu_read_lock();
842
843 sta = sta_info_get(local, ifmgd->bssid);
844 if (!sta) {
845 rcu_read_unlock();
846 return;
847 }
848
849 sta_info_unlink(&sta);
850
851 rcu_read_unlock();
852
853 sta_info_destroy(sta);
854 }
855
856 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
857 {
858 if (!sdata || !sdata->default_key ||
859 sdata->default_key->conf.alg != ALG_WEP)
860 return 0;
861 return 1;
862 }
863
864 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata)
865 {
866 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
867 struct ieee80211_local *local = sdata->local;
868 struct ieee80211_bss *bss;
869 int bss_privacy;
870 int wep_privacy;
871 int privacy_invoked;
872
873 if (!ifmgd || (ifmgd->flags & IEEE80211_STA_MIXED_CELL))
874 return 0;
875
876 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
877 local->hw.conf.channel->center_freq,
878 ifmgd->ssid, ifmgd->ssid_len);
879 if (!bss)
880 return 0;
881
882 bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY);
883 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
884 privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED);
885
886 ieee80211_rx_bss_put(local, bss);
887
888 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
889 return 0;
890
891 return 1;
892 }
893
894 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata)
895 {
896 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
897 struct ieee80211_local *local = sdata->local;
898
899 ifmgd->assoc_tries++;
900 if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
901 printk(KERN_DEBUG "%s: association with AP %pM"
902 " timed out\n",
903 sdata->dev->name, ifmgd->bssid);
904 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
905 ieee80211_sta_send_apinfo(sdata);
906 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
907 sdata->local->hw.conf.channel->center_freq,
908 ifmgd->ssid, ifmgd->ssid_len);
909 /*
910 * We might have a pending scan which had no chance to run yet
911 * due to state == IEEE80211_STA_MLME_ASSOCIATE.
912 * Hence, queue the STAs work again
913 */
914 queue_work(local->hw.workqueue, &ifmgd->work);
915 return;
916 }
917
918 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
919 printk(KERN_DEBUG "%s: associate with AP %pM\n",
920 sdata->dev->name, ifmgd->bssid);
921 if (ieee80211_privacy_mismatch(sdata)) {
922 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
923 "mixed-cell disabled - abort association\n", sdata->dev->name);
924 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
925 return;
926 }
927
928 ieee80211_send_assoc(sdata);
929
930 mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
931 }
932
933
934 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
935 {
936 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
937 struct ieee80211_local *local = sdata->local;
938 struct sta_info *sta;
939 int disassoc;
940
941 /* TODO: start monitoring current AP signal quality and number of
942 * missed beacons. Scan other channels every now and then and search
943 * for better APs. */
944 /* TODO: remove expired BSSes */
945
946 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED;
947
948 rcu_read_lock();
949
950 sta = sta_info_get(local, ifmgd->bssid);
951 if (!sta) {
952 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
953 sdata->dev->name, ifmgd->bssid);
954 disassoc = 1;
955 } else {
956 disassoc = 0;
957 if (time_after(jiffies,
958 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
959 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) {
960 printk(KERN_DEBUG "%s: No ProbeResp from "
961 "current AP %pM - assume out of "
962 "range\n",
963 sdata->dev->name, ifmgd->bssid);
964 disassoc = 1;
965 } else
966 ieee80211_send_probe_req(sdata, ifmgd->bssid,
967 ifmgd->ssid,
968 ifmgd->ssid_len,
969 NULL, 0);
970 ifmgd->flags ^= IEEE80211_STA_PROBEREQ_POLL;
971 } else {
972 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
973 if (time_after(jiffies, ifmgd->last_probe +
974 IEEE80211_PROBE_INTERVAL)) {
975 ifmgd->last_probe = jiffies;
976 ieee80211_send_probe_req(sdata, ifmgd->bssid,
977 ifmgd->ssid,
978 ifmgd->ssid_len,
979 NULL, 0);
980 }
981 }
982 }
983
984 rcu_read_unlock();
985
986 if (disassoc)
987 ieee80211_set_disassoc(sdata, true, true,
988 WLAN_REASON_PREV_AUTH_NOT_VALID);
989 else
990 mod_timer(&ifmgd->timer, jiffies +
991 IEEE80211_MONITORING_INTERVAL);
992 }
993
994
995 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata)
996 {
997 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
998
999 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1000 ifmgd->flags |= IEEE80211_STA_AUTHENTICATED;
1001 ieee80211_associate(sdata);
1002 }
1003
1004
1005 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1006 struct ieee80211_mgmt *mgmt,
1007 size_t len)
1008 {
1009 u8 *pos;
1010 struct ieee802_11_elems elems;
1011
1012 pos = mgmt->u.auth.variable;
1013 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1014 if (!elems.challenge)
1015 return;
1016 ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg,
1017 elems.challenge - 2, elems.challenge_len + 2,
1018 sdata->u.mgd.bssid, 1);
1019 sdata->u.mgd.auth_transaction = 4;
1020 }
1021
1022 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1023 struct ieee80211_mgmt *mgmt,
1024 size_t len)
1025 {
1026 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1027 u16 auth_alg, auth_transaction, status_code;
1028
1029 if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE)
1030 return;
1031
1032 if (len < 24 + 6)
1033 return;
1034
1035 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1036 return;
1037
1038 if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1039 return;
1040
1041 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1042 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1043 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1044
1045 if (auth_alg != ifmgd->auth_alg ||
1046 auth_transaction != ifmgd->auth_transaction)
1047 return;
1048
1049 if (status_code != WLAN_STATUS_SUCCESS) {
1050 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1051 u8 algs[3];
1052 const int num_algs = ARRAY_SIZE(algs);
1053 int i, pos;
1054 algs[0] = algs[1] = algs[2] = 0xff;
1055 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1056 algs[0] = WLAN_AUTH_OPEN;
1057 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1058 algs[1] = WLAN_AUTH_SHARED_KEY;
1059 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1060 algs[2] = WLAN_AUTH_LEAP;
1061 if (ifmgd->auth_alg == WLAN_AUTH_OPEN)
1062 pos = 0;
1063 else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY)
1064 pos = 1;
1065 else
1066 pos = 2;
1067 for (i = 0; i < num_algs; i++) {
1068 pos++;
1069 if (pos >= num_algs)
1070 pos = 0;
1071 if (algs[pos] == ifmgd->auth_alg ||
1072 algs[pos] == 0xff)
1073 continue;
1074 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1075 !ieee80211_sta_wep_configured(sdata))
1076 continue;
1077 ifmgd->auth_alg = algs[pos];
1078 break;
1079 }
1080 }
1081 return;
1082 }
1083
1084 switch (ifmgd->auth_alg) {
1085 case WLAN_AUTH_OPEN:
1086 case WLAN_AUTH_LEAP:
1087 ieee80211_auth_completed(sdata);
1088 break;
1089 case WLAN_AUTH_SHARED_KEY:
1090 if (ifmgd->auth_transaction == 4)
1091 ieee80211_auth_completed(sdata);
1092 else
1093 ieee80211_auth_challenge(sdata, mgmt, len);
1094 break;
1095 }
1096 }
1097
1098
1099 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1100 struct ieee80211_mgmt *mgmt,
1101 size_t len)
1102 {
1103 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1104 u16 reason_code;
1105
1106 if (len < 24 + 2)
1107 return;
1108
1109 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1110 return;
1111
1112 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1113
1114 if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED)
1115 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1116 sdata->dev->name, reason_code);
1117
1118 if (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1119 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE ||
1120 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1121 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1122 mod_timer(&ifmgd->timer, jiffies +
1123 IEEE80211_RETRY_AUTH_INTERVAL);
1124 }
1125
1126 ieee80211_set_disassoc(sdata, true, false, 0);
1127 ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED;
1128 }
1129
1130
1131 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1132 struct ieee80211_mgmt *mgmt,
1133 size_t len)
1134 {
1135 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1136 u16 reason_code;
1137
1138 if (len < 24 + 2)
1139 return;
1140
1141 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1142 return;
1143
1144 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1145
1146 if (ifmgd->flags & IEEE80211_STA_ASSOCIATED)
1147 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1148 sdata->dev->name, reason_code);
1149
1150 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1151 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1152 mod_timer(&ifmgd->timer, jiffies +
1153 IEEE80211_RETRY_AUTH_INTERVAL);
1154 }
1155
1156 ieee80211_set_disassoc(sdata, false, false, reason_code);
1157 }
1158
1159
1160 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1161 struct ieee80211_mgmt *mgmt,
1162 size_t len,
1163 int reassoc)
1164 {
1165 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1166 struct ieee80211_local *local = sdata->local;
1167 struct ieee80211_supported_band *sband;
1168 struct sta_info *sta;
1169 u32 rates, basic_rates;
1170 u16 capab_info, status_code, aid;
1171 struct ieee802_11_elems elems;
1172 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1173 u8 *pos;
1174 u32 changed = 0;
1175 int i, j;
1176 bool have_higher_than_11mbit = false, newsta = false;
1177 u16 ap_ht_cap_flags;
1178
1179 /* AssocResp and ReassocResp have identical structure, so process both
1180 * of them in this function. */
1181
1182 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1183 return;
1184
1185 if (len < 24 + 6)
1186 return;
1187
1188 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1189 return;
1190
1191 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1192 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1193 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1194
1195 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1196 "status=%d aid=%d)\n",
1197 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1198 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1199
1200 pos = mgmt->u.assoc_resp.variable;
1201 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1202
1203 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1204 elems.timeout_int && elems.timeout_int_len == 5 &&
1205 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1206 u32 tu, ms;
1207 tu = get_unaligned_le32(elems.timeout_int + 1);
1208 ms = tu * 1024 / 1000;
1209 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1210 "comeback duration %u TU (%u ms)\n",
1211 sdata->dev->name, tu, ms);
1212 if (ms > IEEE80211_ASSOC_TIMEOUT)
1213 mod_timer(&ifmgd->timer,
1214 jiffies + msecs_to_jiffies(ms));
1215 return;
1216 }
1217
1218 if (status_code != WLAN_STATUS_SUCCESS) {
1219 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1220 sdata->dev->name, status_code);
1221 /* if this was a reassociation, ensure we try a "full"
1222 * association next time. This works around some broken APs
1223 * which do not correctly reject reassociation requests. */
1224 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1225 return;
1226 }
1227
1228 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1229 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1230 "set\n", sdata->dev->name, aid);
1231 aid &= ~(BIT(15) | BIT(14));
1232
1233 if (!elems.supp_rates) {
1234 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1235 sdata->dev->name);
1236 return;
1237 }
1238
1239 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1240 ifmgd->aid = aid;
1241 ifmgd->ap_capab = capab_info;
1242
1243 kfree(ifmgd->assocresp_ies);
1244 ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1245 ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL);
1246 if (ifmgd->assocresp_ies)
1247 memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len);
1248
1249 rcu_read_lock();
1250
1251 /* Add STA entry for the AP */
1252 sta = sta_info_get(local, ifmgd->bssid);
1253 if (!sta) {
1254 newsta = true;
1255
1256 sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC);
1257 if (!sta) {
1258 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1259 " the AP\n", sdata->dev->name);
1260 rcu_read_unlock();
1261 return;
1262 }
1263
1264 /* update new sta with its last rx activity */
1265 sta->last_rx = jiffies;
1266 }
1267
1268 /*
1269 * FIXME: Do we really need to update the sta_info's information here?
1270 * We already know about the AP (we found it in our list) so it
1271 * should already be filled with the right info, no?
1272 * As is stands, all this is racy because typically we assume
1273 * the information that is filled in here (except flags) doesn't
1274 * change while a STA structure is alive. As such, it should move
1275 * to between the sta_info_alloc() and sta_info_insert() above.
1276 */
1277
1278 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1279 WLAN_STA_AUTHORIZED);
1280
1281 rates = 0;
1282 basic_rates = 0;
1283 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1284
1285 for (i = 0; i < elems.supp_rates_len; i++) {
1286 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1287 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1288
1289 if (rate > 110)
1290 have_higher_than_11mbit = true;
1291
1292 for (j = 0; j < sband->n_bitrates; j++) {
1293 if (sband->bitrates[j].bitrate == rate) {
1294 rates |= BIT(j);
1295 if (is_basic)
1296 basic_rates |= BIT(j);
1297 break;
1298 }
1299 }
1300 }
1301
1302 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1303 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1304 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1305
1306 if (rate > 110)
1307 have_higher_than_11mbit = true;
1308
1309 for (j = 0; j < sband->n_bitrates; j++) {
1310 if (sband->bitrates[j].bitrate == rate) {
1311 rates |= BIT(j);
1312 if (is_basic)
1313 basic_rates |= BIT(j);
1314 break;
1315 }
1316 }
1317 }
1318
1319 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1320 sdata->vif.bss_conf.basic_rates = basic_rates;
1321
1322 /* cf. IEEE 802.11 9.2.12 */
1323 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1324 have_higher_than_11mbit)
1325 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1326 else
1327 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1328
1329 /* If TKIP/WEP is used, no need to parse AP's HT capabilities */
1330 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1331 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1332 elems.ht_cap_elem, &sta->sta.ht_cap);
1333
1334 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1335
1336 rate_control_rate_init(sta);
1337
1338 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1339 set_sta_flags(sta, WLAN_STA_MFP);
1340
1341 if (elems.wmm_param)
1342 set_sta_flags(sta, WLAN_STA_WME);
1343
1344 if (newsta) {
1345 int err = sta_info_insert(sta);
1346 if (err) {
1347 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1348 " the AP (error %d)\n", sdata->dev->name, err);
1349 rcu_read_unlock();
1350 return;
1351 }
1352 }
1353
1354 rcu_read_unlock();
1355
1356 if (elems.wmm_param)
1357 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1358 elems.wmm_param_len);
1359
1360 if (elems.ht_info_elem && elems.wmm_param &&
1361 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1362 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1363 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1364 ap_ht_cap_flags);
1365
1366 /* set AID and assoc capability,
1367 * ieee80211_set_associated() will tell the driver */
1368 bss_conf->aid = aid;
1369 bss_conf->assoc_capability = capab_info;
1370 ieee80211_set_associated(sdata, changed);
1371
1372 ieee80211_associated(sdata);
1373 }
1374
1375
1376 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1377 struct ieee80211_mgmt *mgmt,
1378 size_t len,
1379 struct ieee80211_rx_status *rx_status,
1380 struct ieee802_11_elems *elems,
1381 bool beacon)
1382 {
1383 struct ieee80211_local *local = sdata->local;
1384 int freq;
1385 struct ieee80211_bss *bss;
1386 struct ieee80211_channel *channel;
1387
1388 if (elems->ds_params && elems->ds_params_len == 1)
1389 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1390 else
1391 freq = rx_status->freq;
1392
1393 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1394
1395 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1396 return;
1397
1398 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1399 channel, beacon);
1400 if (!bss)
1401 return;
1402
1403 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1404 (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) {
1405 struct ieee80211_channel_sw_ie *sw_elem =
1406 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1407 ieee80211_process_chanswitch(sdata, sw_elem, bss);
1408 }
1409
1410 ieee80211_rx_bss_put(local, bss);
1411 }
1412
1413
1414 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1415 struct ieee80211_mgmt *mgmt,
1416 size_t len,
1417 struct ieee80211_rx_status *rx_status)
1418 {
1419 size_t baselen;
1420 struct ieee802_11_elems elems;
1421
1422 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1423 return; /* ignore ProbeResp to foreign address */
1424
1425 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1426 if (baselen > len)
1427 return;
1428
1429 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1430 &elems);
1431
1432 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1433
1434 /* direct probe may be part of the association flow */
1435 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1436 &sdata->u.mgd.request)) {
1437 printk(KERN_DEBUG "%s direct probe responded\n",
1438 sdata->dev->name);
1439 ieee80211_authenticate(sdata);
1440 }
1441 }
1442
1443 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1444 struct ieee80211_mgmt *mgmt,
1445 size_t len,
1446 struct ieee80211_rx_status *rx_status)
1447 {
1448 struct ieee80211_if_managed *ifmgd;
1449 size_t baselen;
1450 struct ieee802_11_elems elems;
1451 struct ieee80211_local *local = sdata->local;
1452 u32 changed = 0;
1453 bool erp_valid, directed_tim;
1454 u8 erp_value = 0;
1455
1456 /* Process beacon from the current BSS */
1457 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1458 if (baselen > len)
1459 return;
1460
1461 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1462
1463 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
1464
1465 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1466 return;
1467
1468 ifmgd = &sdata->u.mgd;
1469
1470 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) ||
1471 memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1472 return;
1473
1474 if (rx_status->freq != local->hw.conf.channel->center_freq)
1475 return;
1476
1477 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1478 elems.wmm_param_len);
1479
1480 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1481 directed_tim = ieee80211_check_tim(&elems, ifmgd->aid);
1482
1483 if (directed_tim) {
1484 if (local->hw.conf.dynamic_ps_timeout > 0) {
1485 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1486 ieee80211_hw_config(local,
1487 IEEE80211_CONF_CHANGE_PS);
1488 ieee80211_send_nullfunc(local, sdata, 0);
1489 } else {
1490 local->pspolling = true;
1491
1492 /*
1493 * Here is assumed that the driver will be
1494 * able to send ps-poll frame and receive a
1495 * response even though power save mode is
1496 * enabled, but some drivers might require
1497 * to disable power save here. This needs
1498 * to be investigated.
1499 */
1500 ieee80211_send_pspoll(local, sdata);
1501 }
1502 }
1503 }
1504
1505 if (elems.erp_info && elems.erp_info_len >= 1) {
1506 erp_valid = true;
1507 erp_value = elems.erp_info[0];
1508 } else {
1509 erp_valid = false;
1510 }
1511 changed |= ieee80211_handle_bss_capability(sdata,
1512 le16_to_cpu(mgmt->u.beacon.capab_info),
1513 erp_valid, erp_value);
1514
1515
1516 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1517 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) {
1518 struct sta_info *sta;
1519 struct ieee80211_supported_band *sband;
1520 u16 ap_ht_cap_flags;
1521
1522 rcu_read_lock();
1523
1524 sta = sta_info_get(local, ifmgd->bssid);
1525 if (!sta) {
1526 rcu_read_unlock();
1527 return;
1528 }
1529
1530 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1531
1532 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1533 elems.ht_cap_elem, &sta->sta.ht_cap);
1534
1535 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1536
1537 rcu_read_unlock();
1538
1539 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1540 ap_ht_cap_flags);
1541 }
1542
1543 if (elems.country_elem) {
1544 /* Note we are only reviewing this on beacons
1545 * for the BSSID we are associated to */
1546 regulatory_hint_11d(local->hw.wiphy,
1547 elems.country_elem, elems.country_elem_len);
1548
1549 /* TODO: IBSS also needs this */
1550 if (elems.pwr_constr_elem)
1551 ieee80211_handle_pwr_constr(sdata,
1552 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1553 elems.pwr_constr_elem,
1554 elems.pwr_constr_elem_len);
1555 }
1556
1557 ieee80211_bss_info_change_notify(sdata, changed);
1558 }
1559
1560 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1561 struct sk_buff *skb,
1562 struct ieee80211_rx_status *rx_status)
1563 {
1564 struct ieee80211_local *local = sdata->local;
1565 struct ieee80211_mgmt *mgmt;
1566 u16 fc;
1567
1568 if (skb->len < 24)
1569 return RX_DROP_MONITOR;
1570
1571 mgmt = (struct ieee80211_mgmt *) skb->data;
1572 fc = le16_to_cpu(mgmt->frame_control);
1573
1574 switch (fc & IEEE80211_FCTL_STYPE) {
1575 case IEEE80211_STYPE_PROBE_REQ:
1576 case IEEE80211_STYPE_PROBE_RESP:
1577 case IEEE80211_STYPE_BEACON:
1578 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1579 case IEEE80211_STYPE_AUTH:
1580 case IEEE80211_STYPE_ASSOC_RESP:
1581 case IEEE80211_STYPE_REASSOC_RESP:
1582 case IEEE80211_STYPE_DEAUTH:
1583 case IEEE80211_STYPE_DISASSOC:
1584 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1585 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
1586 return RX_QUEUED;
1587 }
1588
1589 return RX_DROP_MONITOR;
1590 }
1591
1592 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1593 struct sk_buff *skb)
1594 {
1595 struct ieee80211_rx_status *rx_status;
1596 struct ieee80211_mgmt *mgmt;
1597 u16 fc;
1598
1599 rx_status = (struct ieee80211_rx_status *) skb->cb;
1600 mgmt = (struct ieee80211_mgmt *) skb->data;
1601 fc = le16_to_cpu(mgmt->frame_control);
1602
1603 switch (fc & IEEE80211_FCTL_STYPE) {
1604 case IEEE80211_STYPE_PROBE_RESP:
1605 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
1606 rx_status);
1607 break;
1608 case IEEE80211_STYPE_BEACON:
1609 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1610 rx_status);
1611 break;
1612 case IEEE80211_STYPE_AUTH:
1613 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
1614 break;
1615 case IEEE80211_STYPE_ASSOC_RESP:
1616 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0);
1617 break;
1618 case IEEE80211_STYPE_REASSOC_RESP:
1619 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1);
1620 break;
1621 case IEEE80211_STYPE_DEAUTH:
1622 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1623 break;
1624 case IEEE80211_STYPE_DISASSOC:
1625 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1626 break;
1627 }
1628
1629 kfree_skb(skb);
1630 }
1631
1632 static void ieee80211_sta_timer(unsigned long data)
1633 {
1634 struct ieee80211_sub_if_data *sdata =
1635 (struct ieee80211_sub_if_data *) data;
1636 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1637 struct ieee80211_local *local = sdata->local;
1638
1639 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1640 queue_work(local->hw.workqueue, &ifmgd->work);
1641 }
1642
1643 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata)
1644 {
1645 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1646 struct ieee80211_local *local = sdata->local;
1647
1648 if (local->ops->reset_tsf) {
1649 /* Reset own TSF to allow time synchronization work. */
1650 local->ops->reset_tsf(local_to_hw(local));
1651 }
1652
1653 ifmgd->wmm_last_param_set = -1; /* allow any WMM update */
1654
1655
1656 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1657 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1658 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1659 ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY;
1660 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1661 ifmgd->auth_alg = WLAN_AUTH_LEAP;
1662 else
1663 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1664 ifmgd->auth_transaction = -1;
1665 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
1666 ifmgd->assoc_scan_tries = 0;
1667 ifmgd->direct_probe_tries = 0;
1668 ifmgd->auth_tries = 0;
1669 ifmgd->assoc_tries = 0;
1670 netif_tx_stop_all_queues(sdata->dev);
1671 netif_carrier_off(sdata->dev);
1672 }
1673
1674 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata)
1675 {
1676 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1677 struct ieee80211_local *local = sdata->local;
1678 struct ieee80211_bss *bss;
1679 u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid;
1680 u8 ssid_len = ifmgd->ssid_len;
1681 u16 capa_mask = WLAN_CAPABILITY_ESS;
1682 u16 capa_val = WLAN_CAPABILITY_ESS;
1683 struct ieee80211_channel *chan = local->oper_channel;
1684
1685 if (ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL |
1686 IEEE80211_STA_AUTO_BSSID_SEL |
1687 IEEE80211_STA_AUTO_CHANNEL_SEL)) {
1688 capa_mask |= WLAN_CAPABILITY_PRIVACY;
1689 if (sdata->default_key)
1690 capa_val |= WLAN_CAPABILITY_PRIVACY;
1691 }
1692
1693 if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
1694 chan = NULL;
1695
1696 if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL)
1697 bssid = NULL;
1698
1699 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) {
1700 ssid = NULL;
1701 ssid_len = 0;
1702 }
1703
1704 bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
1705 bssid, ssid, ssid_len,
1706 capa_mask, capa_val);
1707
1708 if (bss) {
1709 ieee80211_set_freq(sdata, bss->cbss.channel->center_freq);
1710 if (!(ifmgd->flags & IEEE80211_STA_SSID_SET))
1711 ieee80211_sta_set_ssid(sdata, bss->ssid,
1712 bss->ssid_len);
1713 ieee80211_sta_set_bssid(sdata, bss->cbss.bssid);
1714 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
1715 bss->supp_rates);
1716 if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED)
1717 sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED;
1718 else
1719 sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED;
1720
1721 /* Send out direct probe if no probe resp was received or
1722 * the one we have is outdated
1723 */
1724 if (!bss->last_probe_resp ||
1725 time_after(jiffies, bss->last_probe_resp
1726 + IEEE80211_SCAN_RESULT_EXPIRE))
1727 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1728 else
1729 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
1730
1731 ieee80211_rx_bss_put(local, bss);
1732 ieee80211_sta_reset_auth(sdata);
1733 return 0;
1734 } else {
1735 if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
1736 ifmgd->assoc_scan_tries++;
1737 /* XXX maybe racy? */
1738 if (local->scan_req)
1739 return -1;
1740 memcpy(local->int_scan_req.ssids[0].ssid,
1741 ifmgd->ssid, IEEE80211_MAX_SSID_LEN);
1742 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL)
1743 local->int_scan_req.ssids[0].ssid_len = 0;
1744 else
1745 local->int_scan_req.ssids[0].ssid_len = ifmgd->ssid_len;
1746
1747 if (ieee80211_start_scan(sdata, &local->int_scan_req))
1748 ieee80211_scan_failed(local);
1749
1750 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
1751 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
1752 } else {
1753 ifmgd->assoc_scan_tries = 0;
1754 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1755 }
1756 }
1757 return -1;
1758 }
1759
1760
1761 static void ieee80211_sta_work(struct work_struct *work)
1762 {
1763 struct ieee80211_sub_if_data *sdata =
1764 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
1765 struct ieee80211_local *local = sdata->local;
1766 struct ieee80211_if_managed *ifmgd;
1767 struct sk_buff *skb;
1768
1769 if (!netif_running(sdata->dev))
1770 return;
1771
1772 if (local->sw_scanning || local->hw_scanning)
1773 return;
1774
1775 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1776 return;
1777 ifmgd = &sdata->u.mgd;
1778
1779 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
1780 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1781
1782 if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
1783 ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE &&
1784 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE &&
1785 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) {
1786 /*
1787 * The call to ieee80211_start_scan can fail but ieee80211_request_scan
1788 * (which queued ieee80211_sta_work) did not return an error. Thus, call
1789 * ieee80211_scan_failed here if ieee80211_start_scan fails in order to
1790 * notify the scan requester.
1791 */
1792 if (ieee80211_start_scan(sdata, local->scan_req))
1793 ieee80211_scan_failed(local);
1794 return;
1795 }
1796
1797 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) {
1798 if (ieee80211_sta_config_auth(sdata))
1799 return;
1800 clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1801 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request))
1802 return;
1803
1804 switch (ifmgd->state) {
1805 case IEEE80211_STA_MLME_DISABLED:
1806 break;
1807 case IEEE80211_STA_MLME_DIRECT_PROBE:
1808 ieee80211_direct_probe(sdata);
1809 break;
1810 case IEEE80211_STA_MLME_AUTHENTICATE:
1811 ieee80211_authenticate(sdata);
1812 break;
1813 case IEEE80211_STA_MLME_ASSOCIATE:
1814 ieee80211_associate(sdata);
1815 break;
1816 case IEEE80211_STA_MLME_ASSOCIATED:
1817 ieee80211_associated(sdata);
1818 break;
1819 default:
1820 WARN_ON(1);
1821 break;
1822 }
1823
1824 if (ieee80211_privacy_mismatch(sdata)) {
1825 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
1826 "mixed-cell disabled - disassociate\n", sdata->dev->name);
1827
1828 ieee80211_set_disassoc(sdata, false, true,
1829 WLAN_REASON_UNSPECIFIED);
1830 }
1831 }
1832
1833 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
1834 {
1835 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1836 queue_work(sdata->local->hw.workqueue,
1837 &sdata->u.mgd.work);
1838 }
1839
1840 /* interface setup */
1841 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
1842 {
1843 struct ieee80211_if_managed *ifmgd;
1844
1845 ifmgd = &sdata->u.mgd;
1846 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
1847 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1848 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
1849 (unsigned long) sdata);
1850 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
1851 (unsigned long) sdata);
1852 skb_queue_head_init(&ifmgd->skb_queue);
1853
1854 ifmgd->capab = WLAN_CAPABILITY_ESS;
1855 ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN |
1856 IEEE80211_AUTH_ALG_SHARED_KEY;
1857 ifmgd->flags |= IEEE80211_STA_CREATE_IBSS |
1858 IEEE80211_STA_AUTO_BSSID_SEL |
1859 IEEE80211_STA_AUTO_CHANNEL_SEL;
1860 if (sdata->local->hw.queues >= 4)
1861 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
1862 }
1863
1864 /* configuration hooks */
1865 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata)
1866 {
1867 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1868 struct ieee80211_local *local = sdata->local;
1869
1870 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1871 return;
1872
1873 if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET |
1874 IEEE80211_STA_AUTO_BSSID_SEL)) &&
1875 (ifmgd->flags & (IEEE80211_STA_SSID_SET |
1876 IEEE80211_STA_AUTO_SSID_SEL))) {
1877
1878 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)
1879 ieee80211_set_disassoc(sdata, true, true,
1880 WLAN_REASON_DEAUTH_LEAVING);
1881
1882 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
1883 queue_work(local->hw.workqueue, &ifmgd->work);
1884 }
1885 }
1886
1887 int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata)
1888 {
1889 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1890
1891 if (ifmgd->ssid_len)
1892 ifmgd->flags |= IEEE80211_STA_SSID_SET;
1893 else
1894 ifmgd->flags &= ~IEEE80211_STA_SSID_SET;
1895
1896 return 0;
1897 }
1898
1899 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
1900 {
1901 struct ieee80211_if_managed *ifmgd;
1902
1903 if (len > IEEE80211_MAX_SSID_LEN)
1904 return -EINVAL;
1905
1906 ifmgd = &sdata->u.mgd;
1907
1908 if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) {
1909 /*
1910 * Do not use reassociation if SSID is changed (different ESS).
1911 */
1912 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1913 memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid));
1914 memcpy(ifmgd->ssid, ssid, len);
1915 ifmgd->ssid_len = len;
1916 }
1917
1918 return ieee80211_sta_commit(sdata);
1919 }
1920
1921 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
1922 {
1923 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1924 memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len);
1925 *len = ifmgd->ssid_len;
1926 return 0;
1927 }
1928
1929 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
1930 {
1931 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1932
1933 if (is_valid_ether_addr(bssid)) {
1934 memcpy(ifmgd->bssid, bssid, ETH_ALEN);
1935 ifmgd->flags |= IEEE80211_STA_BSSID_SET;
1936 } else {
1937 memset(ifmgd->bssid, 0, ETH_ALEN);
1938 ifmgd->flags &= ~IEEE80211_STA_BSSID_SET;
1939 }
1940
1941 if (netif_running(sdata->dev)) {
1942 if (ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID)) {
1943 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
1944 "the low-level driver\n", sdata->dev->name);
1945 }
1946 }
1947
1948 return ieee80211_sta_commit(sdata);
1949 }
1950
1951 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
1952 {
1953 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1954
1955 kfree(ifmgd->extra_ie);
1956 if (len == 0) {
1957 ifmgd->extra_ie = NULL;
1958 ifmgd->extra_ie_len = 0;
1959 return 0;
1960 }
1961 ifmgd->extra_ie = kmalloc(len, GFP_KERNEL);
1962 if (!ifmgd->extra_ie) {
1963 ifmgd->extra_ie_len = 0;
1964 return -ENOMEM;
1965 }
1966 memcpy(ifmgd->extra_ie, ie, len);
1967 ifmgd->extra_ie_len = len;
1968 return 0;
1969 }
1970
1971 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
1972 {
1973 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
1974 sdata->dev->name, reason);
1975
1976 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1977 return -EINVAL;
1978
1979 ieee80211_set_disassoc(sdata, true, true, reason);
1980 return 0;
1981 }
1982
1983 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
1984 {
1985 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1986
1987 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
1988 sdata->dev->name, reason);
1989
1990 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1991 return -EINVAL;
1992
1993 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED))
1994 return -ENOLINK;
1995
1996 ieee80211_set_disassoc(sdata, false, true, reason);
1997 return 0;
1998 }
1999
2000 /* scan finished notification */
2001 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2002 {
2003 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2004
2005 /* Restart STA timers */
2006 rcu_read_lock();
2007 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2008 ieee80211_restart_sta_timer(sdata);
2009 rcu_read_unlock();
2010 }
2011
2012 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
2013 {
2014 struct ieee80211_local *local =
2015 container_of(work, struct ieee80211_local,
2016 dynamic_ps_disable_work);
2017
2018 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2019 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2020 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2021 }
2022
2023 ieee80211_wake_queues_by_reason(&local->hw,
2024 IEEE80211_QUEUE_STOP_REASON_PS);
2025 }
2026
2027 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
2028 {
2029 struct ieee80211_local *local =
2030 container_of(work, struct ieee80211_local,
2031 dynamic_ps_enable_work);
2032 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2033
2034 if (local->hw.conf.flags & IEEE80211_CONF_PS)
2035 return;
2036
2037 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
2038 ieee80211_send_nullfunc(local, sdata, 1);
2039
2040 local->hw.conf.flags |= IEEE80211_CONF_PS;
2041 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2042 }
2043
2044 void ieee80211_dynamic_ps_timer(unsigned long data)
2045 {
2046 struct ieee80211_local *local = (void *) data;
2047
2048 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
2049 }
2050
2051 void ieee80211_send_nullfunc(struct ieee80211_local *local,
2052 struct ieee80211_sub_if_data *sdata,
2053 int powersave)
2054 {
2055 struct sk_buff *skb;
2056 struct ieee80211_hdr *nullfunc;
2057 __le16 fc;
2058
2059 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2060 return;
2061
2062 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
2063 if (!skb) {
2064 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
2065 "frame\n", sdata->dev->name);
2066 return;
2067 }
2068 skb_reserve(skb, local->hw.extra_tx_headroom);
2069
2070 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
2071 memset(nullfunc, 0, 24);
2072 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
2073 IEEE80211_FCTL_TODS);
2074 if (powersave)
2075 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
2076 nullfunc->frame_control = fc;
2077 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2078 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
2079 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
2080
2081 ieee80211_tx_skb(sdata, skb, 0);
2082 }
Linux kernel - Deliverables
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