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ACPI: make acpi_pci_bind() static
[linux-2.6/linux-acpi-2.6.git] / net / mac80211 / mlme.c
blob132938b073dc061327e8e3e47e00a8919119481e
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_IDLE_TIME (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 ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
86 {
87 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
88 struct ieee80211_local *local = sdata->local;
89 struct sk_buff *skb;
90 struct ieee80211_mgmt *mgmt;
91 u8 *pos, *ies, *ht_ie;
92 int i, len, count, rates_len, supp_rates_len;
93 u16 capab;
94 struct ieee80211_bss *bss;
95 int wmm = 0;
96 struct ieee80211_supported_band *sband;
97 u32 rates = 0;
98
99 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
100 sizeof(*mgmt) + 200 + ifmgd->extra_ie_len +
101 ifmgd->ssid_len);
102 if (!skb) {
103 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
104 "frame\n", sdata->dev->name);
105 return;
106 }
107 skb_reserve(skb, local->hw.extra_tx_headroom);
108
109 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
110
111 capab = ifmgd->capab;
112
113 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
114 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
115 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
116 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
117 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
118 }
119
120 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
121 local->hw.conf.channel->center_freq,
122 ifmgd->ssid, ifmgd->ssid_len);
123 if (bss) {
124 if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
125 capab |= WLAN_CAPABILITY_PRIVACY;
126 if (bss->wmm_used)
127 wmm = 1;
128
129 /* get all rates supported by the device and the AP as
130 * some APs don't like getting a superset of their rates
131 * in the association request (e.g. D-Link DAP 1353 in
132 * b-only mode) */
133 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
134
135 if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
136 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
137 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
138
139 ieee80211_rx_bss_put(local, bss);
140 } else {
141 rates = ~0;
142 rates_len = sband->n_bitrates;
143 }
144
145 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
146 memset(mgmt, 0, 24);
147 memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
148 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
149 memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
150
151 if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) {
152 skb_put(skb, 10);
153 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
154 IEEE80211_STYPE_REASSOC_REQ);
155 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
156 mgmt->u.reassoc_req.listen_interval =
157 cpu_to_le16(local->hw.conf.listen_interval);
158 memcpy(mgmt->u.reassoc_req.current_ap, ifmgd->prev_bssid,
159 ETH_ALEN);
160 } else {
161 skb_put(skb, 4);
162 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
163 IEEE80211_STYPE_ASSOC_REQ);
164 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
165 mgmt->u.assoc_req.listen_interval =
166 cpu_to_le16(local->hw.conf.listen_interval);
167 }
168
169 /* SSID */
170 ies = pos = skb_put(skb, 2 + ifmgd->ssid_len);
171 *pos++ = WLAN_EID_SSID;
172 *pos++ = ifmgd->ssid_len;
173 memcpy(pos, ifmgd->ssid, ifmgd->ssid_len);
174
175 /* add all rates which were marked to be used above */
176 supp_rates_len = rates_len;
177 if (supp_rates_len > 8)
178 supp_rates_len = 8;
179
180 len = sband->n_bitrates;
181 pos = skb_put(skb, supp_rates_len + 2);
182 *pos++ = WLAN_EID_SUPP_RATES;
183 *pos++ = supp_rates_len;
184
185 count = 0;
186 for (i = 0; i < sband->n_bitrates; i++) {
187 if (BIT(i) & rates) {
188 int rate = sband->bitrates[i].bitrate;
189 *pos++ = (u8) (rate / 5);
190 if (++count == 8)
191 break;
192 }
193 }
194
195 if (rates_len > count) {
196 pos = skb_put(skb, rates_len - count + 2);
197 *pos++ = WLAN_EID_EXT_SUPP_RATES;
198 *pos++ = rates_len - count;
199
200 for (i++; i < sband->n_bitrates; i++) {
201 if (BIT(i) & rates) {
202 int rate = sband->bitrates[i].bitrate;
203 *pos++ = (u8) (rate / 5);
204 }
205 }
206 }
207
208 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
209 /* 1. power capabilities */
210 pos = skb_put(skb, 4);
211 *pos++ = WLAN_EID_PWR_CAPABILITY;
212 *pos++ = 2;
213 *pos++ = 0; /* min tx power */
214 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
215
216 /* 2. supported channels */
217 /* TODO: get this in reg domain format */
218 pos = skb_put(skb, 2 * sband->n_channels + 2);
219 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
220 *pos++ = 2 * sband->n_channels;
221 for (i = 0; i < sband->n_channels; i++) {
222 *pos++ = ieee80211_frequency_to_channel(
223 sband->channels[i].center_freq);
224 *pos++ = 1; /* one channel in the subband*/
225 }
226 }
227
228 if (ifmgd->extra_ie) {
229 pos = skb_put(skb, ifmgd->extra_ie_len);
230 memcpy(pos, ifmgd->extra_ie, ifmgd->extra_ie_len);
231 }
232
233 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
234 pos = skb_put(skb, 9);
235 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
236 *pos++ = 7; /* len */
237 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
238 *pos++ = 0x50;
239 *pos++ = 0xf2;
240 *pos++ = 2; /* WME */
241 *pos++ = 0; /* WME info */
242 *pos++ = 1; /* WME ver */
243 *pos++ = 0;
244 }
245
246 /* wmm support is a must to HT */
247 /*
248 * IEEE802.11n does not allow TKIP/WEP as pairwise
249 * ciphers in HT mode. We still associate in non-ht
250 * mode (11a/b/g) if any one of these ciphers is
251 * configured as pairwise.
252 */
253 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
254 sband->ht_cap.ht_supported &&
255 (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) &&
256 ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
257 (!(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))) {
258 struct ieee80211_ht_info *ht_info =
259 (struct ieee80211_ht_info *)(ht_ie + 2);
260 u16 cap = sband->ht_cap.cap;
261 __le16 tmp;
262 u32 flags = local->hw.conf.channel->flags;
263
264 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
265 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
266 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
267 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
268 cap &= ~IEEE80211_HT_CAP_SGI_40;
269 }
270 break;
271 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
272 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
273 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
274 cap &= ~IEEE80211_HT_CAP_SGI_40;
275 }
276 break;
277 }
278
279 tmp = cpu_to_le16(cap);
280 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
281 *pos++ = WLAN_EID_HT_CAPABILITY;
282 *pos++ = sizeof(struct ieee80211_ht_cap);
283 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
284 memcpy(pos, &tmp, sizeof(u16));
285 pos += sizeof(u16);
286 /* TODO: needs a define here for << 2 */
287 *pos++ = sband->ht_cap.ampdu_factor |
288 (sband->ht_cap.ampdu_density << 2);
289 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
290 }
291
292 kfree(ifmgd->assocreq_ies);
293 ifmgd->assocreq_ies_len = (skb->data + skb->len) - ies;
294 ifmgd->assocreq_ies = kmalloc(ifmgd->assocreq_ies_len, GFP_KERNEL);
295 if (ifmgd->assocreq_ies)
296 memcpy(ifmgd->assocreq_ies, ies, ifmgd->assocreq_ies_len);
297
298 ieee80211_tx_skb(sdata, skb, 0);
299 }
300
301
302 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
303 u16 stype, u16 reason)
304 {
305 struct ieee80211_local *local = sdata->local;
306 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
307 struct sk_buff *skb;
308 struct ieee80211_mgmt *mgmt;
309
310 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
311 if (!skb) {
312 printk(KERN_DEBUG "%s: failed to allocate buffer for "
313 "deauth/disassoc frame\n", sdata->dev->name);
314 return;
315 }
316 skb_reserve(skb, local->hw.extra_tx_headroom);
317
318 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
319 memset(mgmt, 0, 24);
320 memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
321 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
322 memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
323 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
324 skb_put(skb, 2);
325 /* u.deauth.reason_code == u.disassoc.reason_code */
326 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
327
328 ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
329 }
330
331 void ieee80211_send_pspoll(struct ieee80211_local *local,
332 struct ieee80211_sub_if_data *sdata)
333 {
334 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
335 struct ieee80211_pspoll *pspoll;
336 struct sk_buff *skb;
337 u16 fc;
338
339 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
340 if (!skb) {
341 printk(KERN_DEBUG "%s: failed to allocate buffer for "
342 "pspoll frame\n", sdata->dev->name);
343 return;
344 }
345 skb_reserve(skb, local->hw.extra_tx_headroom);
346
347 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
348 memset(pspoll, 0, sizeof(*pspoll));
349 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
350 pspoll->frame_control = cpu_to_le16(fc);
351 pspoll->aid = cpu_to_le16(ifmgd->aid);
352
353 /* aid in PS-Poll has its two MSBs each set to 1 */
354 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
355
356 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
357 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
358
359 ieee80211_tx_skb(sdata, skb, 0);
360 }
361
362 /* MLME */
363 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
364 struct ieee80211_if_managed *ifmgd,
365 u8 *wmm_param, size_t wmm_param_len)
366 {
367 struct ieee80211_tx_queue_params params;
368 size_t left;
369 int count;
370 u8 *pos;
371
372 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
373 return;
374
375 if (!wmm_param)
376 return;
377
378 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
379 return;
380 count = wmm_param[6] & 0x0f;
381 if (count == ifmgd->wmm_last_param_set)
382 return;
383 ifmgd->wmm_last_param_set = count;
384
385 pos = wmm_param + 8;
386 left = wmm_param_len - 8;
387
388 memset(&params, 0, sizeof(params));
389
390 local->wmm_acm = 0;
391 for (; left >= 4; left -= 4, pos += 4) {
392 int aci = (pos[0] >> 5) & 0x03;
393 int acm = (pos[0] >> 4) & 0x01;
394 int queue;
395
396 switch (aci) {
397 case 1: /* AC_BK */
398 queue = 3;
399 if (acm)
400 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
401 break;
402 case 2: /* AC_VI */
403 queue = 1;
404 if (acm)
405 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
406 break;
407 case 3: /* AC_VO */
408 queue = 0;
409 if (acm)
410 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
411 break;
412 case 0: /* AC_BE */
413 default:
414 queue = 2;
415 if (acm)
416 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
417 break;
418 }
419
420 params.aifs = pos[0] & 0x0f;
421 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
422 params.cw_min = ecw2cw(pos[1] & 0x0f);
423 params.txop = get_unaligned_le16(pos + 2);
424 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
425 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
426 "cWmin=%d cWmax=%d txop=%d\n",
427 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
428 params.cw_max, params.txop);
429 #endif
430 if (local->ops->conf_tx &&
431 local->ops->conf_tx(local_to_hw(local), queue, &params)) {
432 printk(KERN_DEBUG "%s: failed to set TX queue "
433 "parameters for queue %d\n", local->mdev->name, queue);
434 }
435 }
436 }
437
438 static bool ieee80211_check_tim(struct ieee802_11_elems *elems, u16 aid)
439 {
440 u8 mask;
441 u8 index, indexn1, indexn2;
442 struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *) elems->tim;
443
444 if (unlikely(!tim || elems->tim_len < 4))
445 return false;
446
447 aid &= 0x3fff;
448 index = aid / 8;
449 mask = 1 << (aid & 7);
450
451 indexn1 = tim->bitmap_ctrl & 0xfe;
452 indexn2 = elems->tim_len + indexn1 - 4;
453
454 if (index < indexn1 || index > indexn2)
455 return false;
456
457 index -= indexn1;
458
459 return !!(tim->virtual_map[index] & mask);
460 }
461
462 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
463 u16 capab, bool erp_valid, u8 erp)
464 {
465 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
466 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
467 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
468 #endif
469 u32 changed = 0;
470 bool use_protection;
471 bool use_short_preamble;
472 bool use_short_slot;
473
474 if (erp_valid) {
475 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
476 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
477 } else {
478 use_protection = false;
479 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
480 }
481
482 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
483
484 if (use_protection != bss_conf->use_cts_prot) {
485 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
486 if (net_ratelimit()) {
487 printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
488 sdata->dev->name,
489 use_protection ? "enabled" : "disabled",
490 ifmgd->bssid);
491 }
492 #endif
493 bss_conf->use_cts_prot = use_protection;
494 changed |= BSS_CHANGED_ERP_CTS_PROT;
495 }
496
497 if (use_short_preamble != bss_conf->use_short_preamble) {
498 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
499 if (net_ratelimit()) {
500 printk(KERN_DEBUG "%s: switched to %s barker preamble"
501 " (BSSID=%pM)\n",
502 sdata->dev->name,
503 use_short_preamble ? "short" : "long",
504 ifmgd->bssid);
505 }
506 #endif
507 bss_conf->use_short_preamble = use_short_preamble;
508 changed |= BSS_CHANGED_ERP_PREAMBLE;
509 }
510
511 if (use_short_slot != bss_conf->use_short_slot) {
512 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
513 if (net_ratelimit()) {
514 printk(KERN_DEBUG "%s: switched to %s slot time"
515 " (BSSID=%pM)\n",
516 sdata->dev->name,
517 use_short_slot ? "short" : "long",
518 ifmgd->bssid);
519 }
520 #endif
521 bss_conf->use_short_slot = use_short_slot;
522 changed |= BSS_CHANGED_ERP_SLOT;
523 }
524
525 return changed;
526 }
527
528 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata)
529 {
530 union iwreq_data wrqu;
531
532 memset(&wrqu, 0, sizeof(wrqu));
533 if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED)
534 memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN);
535 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
536 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
537 }
538
539 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata)
540 {
541 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
542 char *buf;
543 size_t len;
544 int i;
545 union iwreq_data wrqu;
546
547 if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies)
548 return;
549
550 buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len +
551 ifmgd->assocresp_ies_len), GFP_KERNEL);
552 if (!buf)
553 return;
554
555 len = sprintf(buf, "ASSOCINFO(");
556 if (ifmgd->assocreq_ies) {
557 len += sprintf(buf + len, "ReqIEs=");
558 for (i = 0; i < ifmgd->assocreq_ies_len; i++) {
559 len += sprintf(buf + len, "%02x",
560 ifmgd->assocreq_ies[i]);
561 }
562 }
563 if (ifmgd->assocresp_ies) {
564 if (ifmgd->assocreq_ies)
565 len += sprintf(buf + len, " ");
566 len += sprintf(buf + len, "RespIEs=");
567 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
568 len += sprintf(buf + len, "%02x",
569 ifmgd->assocresp_ies[i]);
570 }
571 }
572 len += sprintf(buf + len, ")");
573
574 if (len > IW_CUSTOM_MAX) {
575 len = sprintf(buf, "ASSOCRESPIE=");
576 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
577 len += sprintf(buf + len, "%02x",
578 ifmgd->assocresp_ies[i]);
579 }
580 }
581
582 if (len <= IW_CUSTOM_MAX) {
583 memset(&wrqu, 0, sizeof(wrqu));
584 wrqu.data.length = len;
585 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
586 }
587
588 kfree(buf);
589 }
590
591
592 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
593 u32 bss_info_changed)
594 {
595 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
596 struct ieee80211_local *local = sdata->local;
597 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
598
599 struct ieee80211_bss *bss;
600
601 bss_info_changed |= BSS_CHANGED_ASSOC;
602 ifmgd->flags |= IEEE80211_STA_ASSOCIATED;
603
604 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
605 conf->channel->center_freq,
606 ifmgd->ssid, ifmgd->ssid_len);
607 if (bss) {
608 /* set timing information */
609 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
610 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
611 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
612
613 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
614 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
615
616 cfg80211_hold_bss(&bss->cbss);
617
618 ieee80211_rx_bss_put(local, bss);
619 }
620
621 ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET;
622 memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN);
623 ieee80211_sta_send_associnfo(sdata);
624
625 ifmgd->last_probe = jiffies;
626 ieee80211_led_assoc(local, 1);
627
628 sdata->vif.bss_conf.assoc = 1;
629 /*
630 * For now just always ask the driver to update the basic rateset
631 * when we have associated, we aren't checking whether it actually
632 * changed or not.
633 */
634 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
635 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
636
637 if (local->powersave) {
638 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) &&
639 local->hw.conf.dynamic_ps_timeout > 0) {
640 mod_timer(&local->dynamic_ps_timer, jiffies +
641 msecs_to_jiffies(
642 local->hw.conf.dynamic_ps_timeout));
643 } else {
644 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
645 ieee80211_send_nullfunc(local, sdata, 1);
646 conf->flags |= IEEE80211_CONF_PS;
647 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
648 }
649 }
650
651 netif_tx_start_all_queues(sdata->dev);
652 netif_carrier_on(sdata->dev);
653
654 ieee80211_sta_send_apinfo(sdata);
655 }
656
657 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata)
658 {
659 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
660 struct ieee80211_local *local = sdata->local;
661
662 ifmgd->direct_probe_tries++;
663 if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
664 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
665 sdata->dev->name, ifmgd->bssid);
666 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
667 ieee80211_sta_send_apinfo(sdata);
668
669 /*
670 * Most likely AP is not in the range so remove the
671 * bss information associated to the AP
672 */
673 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
674 sdata->local->hw.conf.channel->center_freq,
675 ifmgd->ssid, ifmgd->ssid_len);
676
677 /*
678 * We might have a pending scan which had no chance to run yet
679 * due to state == IEEE80211_STA_MLME_DIRECT_PROBE.
680 * Hence, queue the STAs work again
681 */
682 queue_work(local->hw.workqueue, &ifmgd->work);
683 return;
684 }
685
686 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
687 sdata->dev->name, ifmgd->bssid,
688 ifmgd->direct_probe_tries);
689
690 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
691
692 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifmgd->request);
693
694 /* Direct probe is sent to broadcast address as some APs
695 * will not answer to direct packet in unassociated state.
696 */
697 ieee80211_send_probe_req(sdata, NULL,
698 ifmgd->ssid, ifmgd->ssid_len, NULL, 0);
699
700 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
701 }
702
703
704 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata)
705 {
706 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
707 struct ieee80211_local *local = sdata->local;
708 u8 *ies;
709 size_t ies_len;
710
711 ifmgd->auth_tries++;
712 if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
713 printk(KERN_DEBUG "%s: authentication with AP %pM"
714 " timed out\n",
715 sdata->dev->name, ifmgd->bssid);
716 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
717 ieee80211_sta_send_apinfo(sdata);
718 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
719 sdata->local->hw.conf.channel->center_freq,
720 ifmgd->ssid, ifmgd->ssid_len);
721
722 /*
723 * We might have a pending scan which had no chance to run yet
724 * due to state == IEEE80211_STA_MLME_AUTHENTICATE.
725 * Hence, queue the STAs work again
726 */
727 queue_work(local->hw.workqueue, &ifmgd->work);
728 return;
729 }
730
731 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
732 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
733 sdata->dev->name, ifmgd->bssid);
734
735 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
736 ies = ifmgd->sme_auth_ie;
737 ies_len = ifmgd->sme_auth_ie_len;
738 } else {
739 ies = NULL;
740 ies_len = 0;
741 }
742 ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ies, ies_len,
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 ieee80211_conf *conf = &local_to_hw(local)->conf;
760 struct ieee80211_bss *bss;
761 struct sta_info *sta;
762 u32 changed = 0, config_changed = 0;
763
764 rcu_read_lock();
765
766 sta = sta_info_get(local, ifmgd->bssid);
767 if (!sta) {
768 rcu_read_unlock();
769 return;
770 }
771
772 if (deauth) {
773 ifmgd->direct_probe_tries = 0;
774 ifmgd->auth_tries = 0;
775 }
776 ifmgd->assoc_scan_tries = 0;
777 ifmgd->assoc_tries = 0;
778
779 netif_tx_stop_all_queues(sdata->dev);
780 netif_carrier_off(sdata->dev);
781
782 ieee80211_sta_tear_down_BA_sessions(sta);
783
784 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
785 conf->channel->center_freq,
786 ifmgd->ssid, ifmgd->ssid_len);
787
788 if (bss) {
789 cfg80211_unhold_bss(&bss->cbss);
790 ieee80211_rx_bss_put(local, bss);
791 }
792
793 if (self_disconnected) {
794 if (deauth)
795 ieee80211_send_deauth_disassoc(sdata,
796 IEEE80211_STYPE_DEAUTH, reason);
797 else
798 ieee80211_send_deauth_disassoc(sdata,
799 IEEE80211_STYPE_DISASSOC, reason);
800 }
801
802 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
803 changed |= ieee80211_reset_erp_info(sdata);
804
805 ieee80211_led_assoc(local, 0);
806 changed |= BSS_CHANGED_ASSOC;
807 sdata->vif.bss_conf.assoc = false;
808
809 ieee80211_sta_send_apinfo(sdata);
810
811 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
812 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
813 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
814 sdata->local->hw.conf.channel->center_freq,
815 ifmgd->ssid, ifmgd->ssid_len);
816 }
817
818 rcu_read_unlock();
819
820 /* channel(_type) changes are handled by ieee80211_hw_config */
821 local->oper_channel_type = NL80211_CHAN_NO_HT;
822
823 local->power_constr_level = 0;
824
825 del_timer_sync(&local->dynamic_ps_timer);
826 cancel_work_sync(&local->dynamic_ps_enable_work);
827
828 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
829 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
830 config_changed |= IEEE80211_CONF_CHANGE_PS;
831 }
832
833 ieee80211_hw_config(local, config_changed);
834 ieee80211_bss_info_change_notify(sdata, changed);
835
836 rcu_read_lock();
837
838 sta = sta_info_get(local, ifmgd->bssid);
839 if (!sta) {
840 rcu_read_unlock();
841 return;
842 }
843
844 sta_info_unlink(&sta);
845
846 rcu_read_unlock();
847
848 sta_info_destroy(sta);
849 }
850
851 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
852 {
853 if (!sdata || !sdata->default_key ||
854 sdata->default_key->conf.alg != ALG_WEP)
855 return 0;
856 return 1;
857 }
858
859 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata)
860 {
861 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
862 struct ieee80211_local *local = sdata->local;
863 struct ieee80211_bss *bss;
864 int bss_privacy;
865 int wep_privacy;
866 int privacy_invoked;
867
868 if (!ifmgd || (ifmgd->flags & IEEE80211_STA_EXT_SME))
869 return 0;
870
871 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
872 local->hw.conf.channel->center_freq,
873 ifmgd->ssid, ifmgd->ssid_len);
874 if (!bss)
875 return 0;
876
877 bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY);
878 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
879 privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED);
880
881 ieee80211_rx_bss_put(local, bss);
882
883 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
884 return 0;
885
886 return 1;
887 }
888
889 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata)
890 {
891 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
892 struct ieee80211_local *local = sdata->local;
893
894 ifmgd->assoc_tries++;
895 if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
896 printk(KERN_DEBUG "%s: association with AP %pM"
897 " timed out\n",
898 sdata->dev->name, ifmgd->bssid);
899 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
900 ieee80211_sta_send_apinfo(sdata);
901 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
902 sdata->local->hw.conf.channel->center_freq,
903 ifmgd->ssid, ifmgd->ssid_len);
904 /*
905 * We might have a pending scan which had no chance to run yet
906 * due to state == IEEE80211_STA_MLME_ASSOCIATE.
907 * Hence, queue the STAs work again
908 */
909 queue_work(local->hw.workqueue, &ifmgd->work);
910 return;
911 }
912
913 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
914 printk(KERN_DEBUG "%s: associate with AP %pM\n",
915 sdata->dev->name, ifmgd->bssid);
916 if (ieee80211_privacy_mismatch(sdata)) {
917 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
918 "mixed-cell disabled - abort association\n", sdata->dev->name);
919 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
920 return;
921 }
922
923 ieee80211_send_assoc(sdata);
924
925 mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
926 }
927
928 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
929 struct ieee80211_hdr *hdr)
930 {
931 /*
932 * We can postpone the mgd.timer whenever receiving unicast frames
933 * from AP because we know that the connection is working both ways
934 * at that time. But multicast frames (and hence also beacons) must
935 * be ignored here, because we need to trigger the timer during
936 * data idle periods for sending the periodical probe request to
937 * the AP.
938 */
939 if (!is_multicast_ether_addr(hdr->addr1))
940 mod_timer(&sdata->u.mgd.timer,
941 jiffies + IEEE80211_MONITORING_INTERVAL);
942 }
943
944 void ieee80211_beacon_loss_work(struct work_struct *work)
945 {
946 struct ieee80211_sub_if_data *sdata =
947 container_of(work, struct ieee80211_sub_if_data,
948 u.mgd.beacon_loss_work);
949 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
950
951 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
952 if (net_ratelimit()) {
953 printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM "
954 "- sending probe request\n", sdata->dev->name,
955 sdata->u.mgd.bssid);
956 }
957 #endif
958
959 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
960 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
961 ifmgd->ssid_len, NULL, 0);
962
963 mod_timer(&ifmgd->timer, jiffies + IEEE80211_MONITORING_INTERVAL);
964 }
965
966 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
967 {
968 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
969
970 queue_work(sdata->local->hw.workqueue,
971 &sdata->u.mgd.beacon_loss_work);
972 }
973 EXPORT_SYMBOL(ieee80211_beacon_loss);
974
975 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
976 {
977 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
978 struct ieee80211_local *local = sdata->local;
979 struct sta_info *sta;
980 bool disassoc = false;
981
982 /* TODO: start monitoring current AP signal quality and number of
983 * missed beacons. Scan other channels every now and then and search
984 * for better APs. */
985 /* TODO: remove expired BSSes */
986
987 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED;
988
989 rcu_read_lock();
990
991 sta = sta_info_get(local, ifmgd->bssid);
992 if (!sta) {
993 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
994 sdata->dev->name, ifmgd->bssid);
995 disassoc = true;
996 goto unlock;
997 }
998
999 if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) &&
1000 time_after(jiffies, sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
1001 printk(KERN_DEBUG "%s: no probe response from AP %pM "
1002 "- disassociating\n",
1003 sdata->dev->name, ifmgd->bssid);
1004 disassoc = true;
1005 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1006 goto unlock;
1007 }
1008
1009 /*
1010 * Beacon filtering is only enabled with power save and then the
1011 * stack should not check for beacon loss.
1012 */
1013 if (!((local->hw.flags & IEEE80211_HW_BEACON_FILTER) &&
1014 (local->hw.conf.flags & IEEE80211_CONF_PS)) &&
1015 time_after(jiffies,
1016 ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) {
1017 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1018 if (net_ratelimit()) {
1019 printk(KERN_DEBUG "%s: beacon loss from AP %pM "
1020 "- sending probe request\n",
1021 sdata->dev->name, ifmgd->bssid);
1022 }
1023 #endif
1024 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1025 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1026 ifmgd->ssid_len, NULL, 0);
1027 goto unlock;
1028
1029 }
1030
1031 if (time_after(jiffies, sta->last_rx + IEEE80211_PROBE_IDLE_TIME)) {
1032 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1033 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1034 ifmgd->ssid_len, NULL, 0);
1035 }
1036
1037 unlock:
1038 rcu_read_unlock();
1039
1040 if (disassoc)
1041 ieee80211_set_disassoc(sdata, true, true,
1042 WLAN_REASON_PREV_AUTH_NOT_VALID);
1043 else
1044 mod_timer(&ifmgd->timer, jiffies +
1045 IEEE80211_MONITORING_INTERVAL);
1046 }
1047
1048
1049 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata)
1050 {
1051 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1052
1053 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1054 ifmgd->flags |= IEEE80211_STA_AUTHENTICATED;
1055 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1056 /* Wait for SME to request association */
1057 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1058 } else
1059 ieee80211_associate(sdata);
1060 }
1061
1062
1063 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1064 struct ieee80211_mgmt *mgmt,
1065 size_t len)
1066 {
1067 u8 *pos;
1068 struct ieee802_11_elems elems;
1069
1070 pos = mgmt->u.auth.variable;
1071 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1072 if (!elems.challenge)
1073 return;
1074 ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg,
1075 elems.challenge - 2, elems.challenge_len + 2,
1076 sdata->u.mgd.bssid, 1);
1077 sdata->u.mgd.auth_transaction = 4;
1078 }
1079
1080 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1081 struct ieee80211_mgmt *mgmt,
1082 size_t len)
1083 {
1084 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1085 u16 auth_alg, auth_transaction, status_code;
1086
1087 if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE)
1088 return;
1089
1090 if (len < 24 + 6)
1091 return;
1092
1093 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1094 return;
1095
1096 if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1097 return;
1098
1099 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1100 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1101 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1102
1103 if (auth_alg != ifmgd->auth_alg ||
1104 auth_transaction != ifmgd->auth_transaction)
1105 return;
1106
1107 if (status_code != WLAN_STATUS_SUCCESS) {
1108 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1109 u8 algs[3];
1110 const int num_algs = ARRAY_SIZE(algs);
1111 int i, pos;
1112 algs[0] = algs[1] = algs[2] = 0xff;
1113 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1114 algs[0] = WLAN_AUTH_OPEN;
1115 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1116 algs[1] = WLAN_AUTH_SHARED_KEY;
1117 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1118 algs[2] = WLAN_AUTH_LEAP;
1119 if (ifmgd->auth_alg == WLAN_AUTH_OPEN)
1120 pos = 0;
1121 else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY)
1122 pos = 1;
1123 else
1124 pos = 2;
1125 for (i = 0; i < num_algs; i++) {
1126 pos++;
1127 if (pos >= num_algs)
1128 pos = 0;
1129 if (algs[pos] == ifmgd->auth_alg ||
1130 algs[pos] == 0xff)
1131 continue;
1132 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1133 !ieee80211_sta_wep_configured(sdata))
1134 continue;
1135 ifmgd->auth_alg = algs[pos];
1136 break;
1137 }
1138 }
1139 return;
1140 }
1141
1142 switch (ifmgd->auth_alg) {
1143 case WLAN_AUTH_OPEN:
1144 case WLAN_AUTH_LEAP:
1145 case WLAN_AUTH_FT:
1146 ieee80211_auth_completed(sdata);
1147 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1148 break;
1149 case WLAN_AUTH_SHARED_KEY:
1150 if (ifmgd->auth_transaction == 4) {
1151 ieee80211_auth_completed(sdata);
1152 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1153 } else
1154 ieee80211_auth_challenge(sdata, mgmt, len);
1155 break;
1156 }
1157 }
1158
1159
1160 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1161 struct ieee80211_mgmt *mgmt,
1162 size_t len)
1163 {
1164 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1165 u16 reason_code;
1166
1167 if (len < 24 + 2)
1168 return;
1169
1170 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1171 return;
1172
1173 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1174
1175 if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED)
1176 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1177 sdata->dev->name, reason_code);
1178
1179 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1180 (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1181 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE ||
1182 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) {
1183 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1184 mod_timer(&ifmgd->timer, jiffies +
1185 IEEE80211_RETRY_AUTH_INTERVAL);
1186 }
1187
1188 ieee80211_set_disassoc(sdata, true, false, 0);
1189 ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED;
1190 cfg80211_send_rx_deauth(sdata->dev, (u8 *) mgmt, len);
1191 }
1192
1193
1194 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1195 struct ieee80211_mgmt *mgmt,
1196 size_t len)
1197 {
1198 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1199 u16 reason_code;
1200
1201 if (len < 24 + 2)
1202 return;
1203
1204 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1205 return;
1206
1207 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1208
1209 if (ifmgd->flags & IEEE80211_STA_ASSOCIATED)
1210 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1211 sdata->dev->name, reason_code);
1212
1213 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1214 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1215 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1216 mod_timer(&ifmgd->timer, jiffies +
1217 IEEE80211_RETRY_AUTH_INTERVAL);
1218 }
1219
1220 ieee80211_set_disassoc(sdata, false, false, reason_code);
1221 cfg80211_send_rx_disassoc(sdata->dev, (u8 *) mgmt, len);
1222 }
1223
1224
1225 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1226 struct ieee80211_mgmt *mgmt,
1227 size_t len,
1228 int reassoc)
1229 {
1230 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1231 struct ieee80211_local *local = sdata->local;
1232 struct ieee80211_supported_band *sband;
1233 struct sta_info *sta;
1234 u32 rates, basic_rates;
1235 u16 capab_info, status_code, aid;
1236 struct ieee802_11_elems elems;
1237 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1238 u8 *pos;
1239 u32 changed = 0;
1240 int i, j;
1241 bool have_higher_than_11mbit = false, newsta = false;
1242 u16 ap_ht_cap_flags;
1243
1244 /* AssocResp and ReassocResp have identical structure, so process both
1245 * of them in this function. */
1246
1247 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1248 return;
1249
1250 if (len < 24 + 6)
1251 return;
1252
1253 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1254 return;
1255
1256 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1257 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1258 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1259
1260 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1261 "status=%d aid=%d)\n",
1262 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1263 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1264
1265 pos = mgmt->u.assoc_resp.variable;
1266 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1267
1268 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1269 elems.timeout_int && elems.timeout_int_len == 5 &&
1270 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1271 u32 tu, ms;
1272 tu = get_unaligned_le32(elems.timeout_int + 1);
1273 ms = tu * 1024 / 1000;
1274 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1275 "comeback duration %u TU (%u ms)\n",
1276 sdata->dev->name, tu, ms);
1277 if (ms > IEEE80211_ASSOC_TIMEOUT)
1278 mod_timer(&ifmgd->timer,
1279 jiffies + msecs_to_jiffies(ms));
1280 return;
1281 }
1282
1283 if (status_code != WLAN_STATUS_SUCCESS) {
1284 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1285 sdata->dev->name, status_code);
1286 /* if this was a reassociation, ensure we try a "full"
1287 * association next time. This works around some broken APs
1288 * which do not correctly reject reassociation requests. */
1289 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1290 return;
1291 }
1292
1293 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1294 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1295 "set\n", sdata->dev->name, aid);
1296 aid &= ~(BIT(15) | BIT(14));
1297
1298 if (!elems.supp_rates) {
1299 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1300 sdata->dev->name);
1301 return;
1302 }
1303
1304 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1305 ifmgd->aid = aid;
1306 ifmgd->ap_capab = capab_info;
1307
1308 kfree(ifmgd->assocresp_ies);
1309 ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1310 ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL);
1311 if (ifmgd->assocresp_ies)
1312 memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len);
1313
1314 rcu_read_lock();
1315
1316 /* Add STA entry for the AP */
1317 sta = sta_info_get(local, ifmgd->bssid);
1318 if (!sta) {
1319 newsta = true;
1320
1321 sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC);
1322 if (!sta) {
1323 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1324 " the AP\n", sdata->dev->name);
1325 rcu_read_unlock();
1326 return;
1327 }
1328
1329 /* update new sta with its last rx activity */
1330 sta->last_rx = jiffies;
1331 }
1332
1333 /*
1334 * FIXME: Do we really need to update the sta_info's information here?
1335 * We already know about the AP (we found it in our list) so it
1336 * should already be filled with the right info, no?
1337 * As is stands, all this is racy because typically we assume
1338 * the information that is filled in here (except flags) doesn't
1339 * change while a STA structure is alive. As such, it should move
1340 * to between the sta_info_alloc() and sta_info_insert() above.
1341 */
1342
1343 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1344 WLAN_STA_AUTHORIZED);
1345
1346 rates = 0;
1347 basic_rates = 0;
1348 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1349
1350 for (i = 0; i < elems.supp_rates_len; i++) {
1351 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1352 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1353
1354 if (rate > 110)
1355 have_higher_than_11mbit = true;
1356
1357 for (j = 0; j < sband->n_bitrates; j++) {
1358 if (sband->bitrates[j].bitrate == rate) {
1359 rates |= BIT(j);
1360 if (is_basic)
1361 basic_rates |= BIT(j);
1362 break;
1363 }
1364 }
1365 }
1366
1367 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1368 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1369 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1370
1371 if (rate > 110)
1372 have_higher_than_11mbit = true;
1373
1374 for (j = 0; j < sband->n_bitrates; j++) {
1375 if (sband->bitrates[j].bitrate == rate) {
1376 rates |= BIT(j);
1377 if (is_basic)
1378 basic_rates |= BIT(j);
1379 break;
1380 }
1381 }
1382 }
1383
1384 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1385 sdata->vif.bss_conf.basic_rates = basic_rates;
1386
1387 /* cf. IEEE 802.11 9.2.12 */
1388 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1389 have_higher_than_11mbit)
1390 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1391 else
1392 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1393
1394 /* If TKIP/WEP is used, no need to parse AP's HT capabilities */
1395 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1396 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1397 elems.ht_cap_elem, &sta->sta.ht_cap);
1398
1399 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1400
1401 rate_control_rate_init(sta);
1402
1403 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1404 set_sta_flags(sta, WLAN_STA_MFP);
1405
1406 if (elems.wmm_param)
1407 set_sta_flags(sta, WLAN_STA_WME);
1408
1409 if (newsta) {
1410 int err = sta_info_insert(sta);
1411 if (err) {
1412 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1413 " the AP (error %d)\n", sdata->dev->name, err);
1414 rcu_read_unlock();
1415 return;
1416 }
1417 }
1418
1419 rcu_read_unlock();
1420
1421 if (elems.wmm_param)
1422 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1423 elems.wmm_param_len);
1424
1425 if (elems.ht_info_elem && elems.wmm_param &&
1426 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1427 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1428 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1429 ap_ht_cap_flags);
1430
1431 /* set AID and assoc capability,
1432 * ieee80211_set_associated() will tell the driver */
1433 bss_conf->aid = aid;
1434 bss_conf->assoc_capability = capab_info;
1435 ieee80211_set_associated(sdata, changed);
1436
1437 /*
1438 * initialise the time of last beacon to be the association time,
1439 * otherwise beacon loss check will trigger immediately
1440 */
1441 ifmgd->last_beacon = jiffies;
1442
1443 ieee80211_associated(sdata);
1444 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1445 }
1446
1447
1448 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1449 struct ieee80211_mgmt *mgmt,
1450 size_t len,
1451 struct ieee80211_rx_status *rx_status,
1452 struct ieee802_11_elems *elems,
1453 bool beacon)
1454 {
1455 struct ieee80211_local *local = sdata->local;
1456 int freq;
1457 struct ieee80211_bss *bss;
1458 struct ieee80211_channel *channel;
1459
1460 if (elems->ds_params && elems->ds_params_len == 1)
1461 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1462 else
1463 freq = rx_status->freq;
1464
1465 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1466
1467 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1468 return;
1469
1470 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1471 channel, beacon);
1472 if (!bss)
1473 return;
1474
1475 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1476 (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) {
1477 struct ieee80211_channel_sw_ie *sw_elem =
1478 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1479 ieee80211_process_chanswitch(sdata, sw_elem, bss);
1480 }
1481
1482 ieee80211_rx_bss_put(local, bss);
1483 }
1484
1485
1486 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1487 struct ieee80211_mgmt *mgmt,
1488 size_t len,
1489 struct ieee80211_rx_status *rx_status)
1490 {
1491 struct ieee80211_if_managed *ifmgd;
1492 size_t baselen;
1493 struct ieee802_11_elems elems;
1494
1495 ifmgd = &sdata->u.mgd;
1496
1497 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1498 return; /* ignore ProbeResp to foreign address */
1499
1500 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1501 if (baselen > len)
1502 return;
1503
1504 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1505 &elems);
1506
1507 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1508
1509 /* direct probe may be part of the association flow */
1510 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1511 &ifmgd->request)) {
1512 printk(KERN_DEBUG "%s direct probe responded\n",
1513 sdata->dev->name);
1514 ieee80211_authenticate(sdata);
1515 }
1516
1517 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
1518 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1519 }
1520
1521 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1522 struct ieee80211_mgmt *mgmt,
1523 size_t len,
1524 struct ieee80211_rx_status *rx_status)
1525 {
1526 struct ieee80211_if_managed *ifmgd;
1527 size_t baselen;
1528 struct ieee802_11_elems elems;
1529 struct ieee80211_local *local = sdata->local;
1530 u32 changed = 0;
1531 bool erp_valid, directed_tim;
1532 u8 erp_value = 0;
1533
1534 /* Process beacon from the current BSS */
1535 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1536 if (baselen > len)
1537 return;
1538
1539 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1540
1541 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
1542
1543 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1544 return;
1545
1546 ifmgd = &sdata->u.mgd;
1547
1548 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) ||
1549 memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1550 return;
1551
1552 if (rx_status->freq != local->hw.conf.channel->center_freq)
1553 return;
1554
1555 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1556 elems.wmm_param_len);
1557
1558 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1559 directed_tim = ieee80211_check_tim(&elems, ifmgd->aid);
1560
1561 if (directed_tim) {
1562 if (local->hw.conf.dynamic_ps_timeout > 0) {
1563 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1564 ieee80211_hw_config(local,
1565 IEEE80211_CONF_CHANGE_PS);
1566 ieee80211_send_nullfunc(local, sdata, 0);
1567 } else {
1568 local->pspolling = true;
1569
1570 /*
1571 * Here is assumed that the driver will be
1572 * able to send ps-poll frame and receive a
1573 * response even though power save mode is
1574 * enabled, but some drivers might require
1575 * to disable power save here. This needs
1576 * to be investigated.
1577 */
1578 ieee80211_send_pspoll(local, sdata);
1579 }
1580 }
1581 }
1582
1583 if (elems.erp_info && elems.erp_info_len >= 1) {
1584 erp_valid = true;
1585 erp_value = elems.erp_info[0];
1586 } else {
1587 erp_valid = false;
1588 }
1589 changed |= ieee80211_handle_bss_capability(sdata,
1590 le16_to_cpu(mgmt->u.beacon.capab_info),
1591 erp_valid, erp_value);
1592
1593
1594 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1595 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) {
1596 struct sta_info *sta;
1597 struct ieee80211_supported_band *sband;
1598 u16 ap_ht_cap_flags;
1599
1600 rcu_read_lock();
1601
1602 sta = sta_info_get(local, ifmgd->bssid);
1603 if (!sta) {
1604 rcu_read_unlock();
1605 return;
1606 }
1607
1608 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1609
1610 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1611 elems.ht_cap_elem, &sta->sta.ht_cap);
1612
1613 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1614
1615 rcu_read_unlock();
1616
1617 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1618 ap_ht_cap_flags);
1619 }
1620
1621 if (elems.country_elem) {
1622 /* Note we are only reviewing this on beacons
1623 * for the BSSID we are associated to */
1624 regulatory_hint_11d(local->hw.wiphy,
1625 elems.country_elem, elems.country_elem_len);
1626
1627 /* TODO: IBSS also needs this */
1628 if (elems.pwr_constr_elem)
1629 ieee80211_handle_pwr_constr(sdata,
1630 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1631 elems.pwr_constr_elem,
1632 elems.pwr_constr_elem_len);
1633 }
1634
1635 ieee80211_bss_info_change_notify(sdata, changed);
1636 }
1637
1638 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1639 struct sk_buff *skb,
1640 struct ieee80211_rx_status *rx_status)
1641 {
1642 struct ieee80211_local *local = sdata->local;
1643 struct ieee80211_mgmt *mgmt;
1644 u16 fc;
1645
1646 if (skb->len < 24)
1647 return RX_DROP_MONITOR;
1648
1649 mgmt = (struct ieee80211_mgmt *) skb->data;
1650 fc = le16_to_cpu(mgmt->frame_control);
1651
1652 switch (fc & IEEE80211_FCTL_STYPE) {
1653 case IEEE80211_STYPE_PROBE_REQ:
1654 case IEEE80211_STYPE_PROBE_RESP:
1655 case IEEE80211_STYPE_BEACON:
1656 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1657 case IEEE80211_STYPE_AUTH:
1658 case IEEE80211_STYPE_ASSOC_RESP:
1659 case IEEE80211_STYPE_REASSOC_RESP:
1660 case IEEE80211_STYPE_DEAUTH:
1661 case IEEE80211_STYPE_DISASSOC:
1662 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1663 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
1664 return RX_QUEUED;
1665 }
1666
1667 return RX_DROP_MONITOR;
1668 }
1669
1670 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1671 struct sk_buff *skb)
1672 {
1673 struct ieee80211_rx_status *rx_status;
1674 struct ieee80211_mgmt *mgmt;
1675 u16 fc;
1676
1677 rx_status = (struct ieee80211_rx_status *) skb->cb;
1678 mgmt = (struct ieee80211_mgmt *) skb->data;
1679 fc = le16_to_cpu(mgmt->frame_control);
1680
1681 switch (fc & IEEE80211_FCTL_STYPE) {
1682 case IEEE80211_STYPE_PROBE_RESP:
1683 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
1684 rx_status);
1685 break;
1686 case IEEE80211_STYPE_BEACON:
1687 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1688 rx_status);
1689 break;
1690 case IEEE80211_STYPE_AUTH:
1691 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
1692 break;
1693 case IEEE80211_STYPE_ASSOC_RESP:
1694 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0);
1695 break;
1696 case IEEE80211_STYPE_REASSOC_RESP:
1697 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1);
1698 break;
1699 case IEEE80211_STYPE_DEAUTH:
1700 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1701 break;
1702 case IEEE80211_STYPE_DISASSOC:
1703 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1704 break;
1705 }
1706
1707 kfree_skb(skb);
1708 }
1709
1710 static void ieee80211_sta_timer(unsigned long data)
1711 {
1712 struct ieee80211_sub_if_data *sdata =
1713 (struct ieee80211_sub_if_data *) data;
1714 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1715 struct ieee80211_local *local = sdata->local;
1716
1717 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1718 queue_work(local->hw.workqueue, &ifmgd->work);
1719 }
1720
1721 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata)
1722 {
1723 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1724 struct ieee80211_local *local = sdata->local;
1725
1726 if (local->ops->reset_tsf) {
1727 /* Reset own TSF to allow time synchronization work. */
1728 local->ops->reset_tsf(local_to_hw(local));
1729 }
1730
1731 ifmgd->wmm_last_param_set = -1; /* allow any WMM update */
1732
1733
1734 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1735 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1736 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1737 ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY;
1738 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1739 ifmgd->auth_alg = WLAN_AUTH_LEAP;
1740 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_FT)
1741 ifmgd->auth_alg = WLAN_AUTH_FT;
1742 else
1743 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1744 ifmgd->auth_transaction = -1;
1745 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
1746 ifmgd->assoc_scan_tries = 0;
1747 ifmgd->direct_probe_tries = 0;
1748 ifmgd->auth_tries = 0;
1749 ifmgd->assoc_tries = 0;
1750 netif_tx_stop_all_queues(sdata->dev);
1751 netif_carrier_off(sdata->dev);
1752 }
1753
1754 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata)
1755 {
1756 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1757 struct ieee80211_local *local = sdata->local;
1758 struct ieee80211_bss *bss;
1759 u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid;
1760 u8 ssid_len = ifmgd->ssid_len;
1761 u16 capa_mask = WLAN_CAPABILITY_ESS;
1762 u16 capa_val = WLAN_CAPABILITY_ESS;
1763 struct ieee80211_channel *chan = local->oper_channel;
1764
1765 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1766 ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL |
1767 IEEE80211_STA_AUTO_BSSID_SEL |
1768 IEEE80211_STA_AUTO_CHANNEL_SEL)) {
1769 capa_mask |= WLAN_CAPABILITY_PRIVACY;
1770 if (sdata->default_key)
1771 capa_val |= WLAN_CAPABILITY_PRIVACY;
1772 }
1773
1774 if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
1775 chan = NULL;
1776
1777 if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL)
1778 bssid = NULL;
1779
1780 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) {
1781 ssid = NULL;
1782 ssid_len = 0;
1783 }
1784
1785 bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
1786 bssid, ssid, ssid_len,
1787 capa_mask, capa_val);
1788
1789 if (bss) {
1790 ieee80211_set_freq(sdata, bss->cbss.channel->center_freq);
1791 if (!(ifmgd->flags & IEEE80211_STA_SSID_SET))
1792 ieee80211_sta_set_ssid(sdata, bss->ssid,
1793 bss->ssid_len);
1794 ieee80211_sta_set_bssid(sdata, bss->cbss.bssid);
1795 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
1796 bss->supp_rates);
1797 if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED)
1798 sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED;
1799 else
1800 sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED;
1801
1802 /* Send out direct probe if no probe resp was received or
1803 * the one we have is outdated
1804 */
1805 if (!bss->last_probe_resp ||
1806 time_after(jiffies, bss->last_probe_resp
1807 + IEEE80211_SCAN_RESULT_EXPIRE))
1808 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1809 else
1810 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
1811
1812 ieee80211_rx_bss_put(local, bss);
1813 ieee80211_sta_reset_auth(sdata);
1814 return 0;
1815 } else {
1816 if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
1817 ifmgd->assoc_scan_tries++;
1818 /* XXX maybe racy? */
1819 if (local->scan_req)
1820 return -1;
1821 memcpy(local->int_scan_req.ssids[0].ssid,
1822 ifmgd->ssid, IEEE80211_MAX_SSID_LEN);
1823 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL)
1824 local->int_scan_req.ssids[0].ssid_len = 0;
1825 else
1826 local->int_scan_req.ssids[0].ssid_len = ifmgd->ssid_len;
1827
1828 if (ieee80211_start_scan(sdata, &local->int_scan_req))
1829 ieee80211_scan_failed(local);
1830
1831 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
1832 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
1833 } else {
1834 ifmgd->assoc_scan_tries = 0;
1835 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1836 }
1837 }
1838 return -1;
1839 }
1840
1841
1842 static void ieee80211_sta_work(struct work_struct *work)
1843 {
1844 struct ieee80211_sub_if_data *sdata =
1845 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
1846 struct ieee80211_local *local = sdata->local;
1847 struct ieee80211_if_managed *ifmgd;
1848 struct sk_buff *skb;
1849
1850 if (!netif_running(sdata->dev))
1851 return;
1852
1853 if (local->sw_scanning || local->hw_scanning)
1854 return;
1855
1856 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1857 return;
1858 ifmgd = &sdata->u.mgd;
1859
1860 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
1861 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1862
1863 if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
1864 ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE &&
1865 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE &&
1866 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) {
1867 /*
1868 * The call to ieee80211_start_scan can fail but ieee80211_request_scan
1869 * (which queued ieee80211_sta_work) did not return an error. Thus, call
1870 * ieee80211_scan_failed here if ieee80211_start_scan fails in order to
1871 * notify the scan requester.
1872 */
1873 if (ieee80211_start_scan(sdata, local->scan_req))
1874 ieee80211_scan_failed(local);
1875 return;
1876 }
1877
1878 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) {
1879 if (ieee80211_sta_config_auth(sdata))
1880 return;
1881 clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1882 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request))
1883 return;
1884
1885 switch (ifmgd->state) {
1886 case IEEE80211_STA_MLME_DISABLED:
1887 break;
1888 case IEEE80211_STA_MLME_DIRECT_PROBE:
1889 ieee80211_direct_probe(sdata);
1890 break;
1891 case IEEE80211_STA_MLME_AUTHENTICATE:
1892 ieee80211_authenticate(sdata);
1893 break;
1894 case IEEE80211_STA_MLME_ASSOCIATE:
1895 ieee80211_associate(sdata);
1896 break;
1897 case IEEE80211_STA_MLME_ASSOCIATED:
1898 ieee80211_associated(sdata);
1899 break;
1900 default:
1901 WARN_ON(1);
1902 break;
1903 }
1904
1905 if (ieee80211_privacy_mismatch(sdata)) {
1906 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
1907 "mixed-cell disabled - disassociate\n", sdata->dev->name);
1908
1909 ieee80211_set_disassoc(sdata, false, true,
1910 WLAN_REASON_UNSPECIFIED);
1911 }
1912 }
1913
1914 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
1915 {
1916 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
1917 /*
1918 * Need to update last_beacon to avoid beacon loss
1919 * test to trigger.
1920 */
1921 sdata->u.mgd.last_beacon = jiffies;
1922
1923
1924 queue_work(sdata->local->hw.workqueue,
1925 &sdata->u.mgd.work);
1926 }
1927 }
1928
1929 /* interface setup */
1930 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
1931 {
1932 struct ieee80211_if_managed *ifmgd;
1933
1934 ifmgd = &sdata->u.mgd;
1935 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
1936 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1937 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
1938 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
1939 (unsigned long) sdata);
1940 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
1941 (unsigned long) sdata);
1942 skb_queue_head_init(&ifmgd->skb_queue);
1943
1944 ifmgd->capab = WLAN_CAPABILITY_ESS;
1945 ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN |
1946 IEEE80211_AUTH_ALG_SHARED_KEY;
1947 ifmgd->flags |= IEEE80211_STA_CREATE_IBSS |
1948 IEEE80211_STA_AUTO_BSSID_SEL |
1949 IEEE80211_STA_AUTO_CHANNEL_SEL;
1950 if (sdata->local->hw.queues >= 4)
1951 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
1952 }
1953
1954 /* configuration hooks */
1955 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata)
1956 {
1957 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1958 struct ieee80211_local *local = sdata->local;
1959
1960 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1961 return;
1962
1963 if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET |
1964 IEEE80211_STA_AUTO_BSSID_SEL)) &&
1965 (ifmgd->flags & (IEEE80211_STA_SSID_SET |
1966 IEEE80211_STA_AUTO_SSID_SEL))) {
1967
1968 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)
1969 ieee80211_set_disassoc(sdata, true, true,
1970 WLAN_REASON_DEAUTH_LEAVING);
1971
1972 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) ||
1973 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1974 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
1975 else if (ifmgd->flags & IEEE80211_STA_EXT_SME)
1976 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1977 queue_work(local->hw.workqueue, &ifmgd->work);
1978 }
1979 }
1980
1981 int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata)
1982 {
1983 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1984
1985 if (ifmgd->ssid_len)
1986 ifmgd->flags |= IEEE80211_STA_SSID_SET;
1987 else
1988 ifmgd->flags &= ~IEEE80211_STA_SSID_SET;
1989
1990 return 0;
1991 }
1992
1993 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
1994 {
1995 struct ieee80211_if_managed *ifmgd;
1996
1997 if (len > IEEE80211_MAX_SSID_LEN)
1998 return -EINVAL;
1999
2000 ifmgd = &sdata->u.mgd;
2001
2002 if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) {
2003 /*
2004 * Do not use reassociation if SSID is changed (different ESS).
2005 */
2006 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2007 memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid));
2008 memcpy(ifmgd->ssid, ssid, len);
2009 ifmgd->ssid_len = len;
2010 }
2011
2012 return ieee80211_sta_commit(sdata);
2013 }
2014
2015 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2016 {
2017 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2018 memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len);
2019 *len = ifmgd->ssid_len;
2020 return 0;
2021 }
2022
2023 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2024 {
2025 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2026
2027 if (is_valid_ether_addr(bssid)) {
2028 memcpy(ifmgd->bssid, bssid, ETH_ALEN);
2029 ifmgd->flags |= IEEE80211_STA_BSSID_SET;
2030 } else {
2031 memset(ifmgd->bssid, 0, ETH_ALEN);
2032 ifmgd->flags &= ~IEEE80211_STA_BSSID_SET;
2033 }
2034
2035 if (netif_running(sdata->dev)) {
2036 if (ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID)) {
2037 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2038 "the low-level driver\n", sdata->dev->name);
2039 }
2040 }
2041
2042 return ieee80211_sta_commit(sdata);
2043 }
2044
2045 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
2046 const char *ie, size_t len)
2047 {
2048 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2049
2050 kfree(ifmgd->extra_ie);
2051 if (len == 0) {
2052 ifmgd->extra_ie = NULL;
2053 ifmgd->extra_ie_len = 0;
2054 return 0;
2055 }
2056 ifmgd->extra_ie = kmalloc(len, GFP_KERNEL);
2057 if (!ifmgd->extra_ie) {
2058 ifmgd->extra_ie_len = 0;
2059 return -ENOMEM;
2060 }
2061 memcpy(ifmgd->extra_ie, ie, len);
2062 ifmgd->extra_ie_len = len;
2063 return 0;
2064 }
2065
2066 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2067 {
2068 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2069 sdata->dev->name, reason);
2070
2071 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2072 return -EINVAL;
2073
2074 ieee80211_set_disassoc(sdata, true, true, reason);
2075 return 0;
2076 }
2077
2078 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2079 {
2080 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2081
2082 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2083 sdata->dev->name, reason);
2084
2085 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2086 return -EINVAL;
2087
2088 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED))
2089 return -ENOLINK;
2090
2091 ieee80211_set_disassoc(sdata, false, true, reason);
2092 return 0;
2093 }
2094
2095 /* scan finished notification */
2096 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2097 {
2098 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2099
2100 /* Restart STA timers */
2101 rcu_read_lock();
2102 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2103 ieee80211_restart_sta_timer(sdata);
2104 rcu_read_unlock();
2105 }
2106
2107 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
2108 {
2109 struct ieee80211_local *local =
2110 container_of(work, struct ieee80211_local,
2111 dynamic_ps_disable_work);
2112
2113 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2114 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2115 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2116 }
2117
2118 ieee80211_wake_queues_by_reason(&local->hw,
2119 IEEE80211_QUEUE_STOP_REASON_PS);
2120 }
2121
2122 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
2123 {
2124 struct ieee80211_local *local =
2125 container_of(work, struct ieee80211_local,
2126 dynamic_ps_enable_work);
2127 /* XXX: using scan_sdata is completely broken! */
2128 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2129
2130 if (local->hw.conf.flags & IEEE80211_CONF_PS)
2131 return;
2132
2133 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK && sdata)
2134 ieee80211_send_nullfunc(local, sdata, 1);
2135
2136 local->hw.conf.flags |= IEEE80211_CONF_PS;
2137 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2138 }
2139
2140 void ieee80211_dynamic_ps_timer(unsigned long data)
2141 {
2142 struct ieee80211_local *local = (void *) data;
2143
2144 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
2145 }
2146
2147 void ieee80211_send_nullfunc(struct ieee80211_local *local,
2148 struct ieee80211_sub_if_data *sdata,
2149 int powersave)
2150 {
2151 struct sk_buff *skb;
2152 struct ieee80211_hdr *nullfunc;
2153 __le16 fc;
2154
2155 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2156 return;
2157
2158 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
2159 if (!skb) {
2160 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
2161 "frame\n", sdata->dev->name);
2162 return;
2163 }
2164 skb_reserve(skb, local->hw.extra_tx_headroom);
2165
2166 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
2167 memset(nullfunc, 0, 24);
2168 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
2169 IEEE80211_FCTL_TODS);
2170 if (powersave)
2171 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
2172 nullfunc->frame_control = fc;
2173 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2174 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
2175 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
2176
2177 ieee80211_tx_skb(sdata, skb, 0);
2178 }
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