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Pull cpumask into release branch
[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_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 aid &= 0x3fff;
445 index = aid / 8;
446 mask = 1 << (aid & 7);
447
448 indexn1 = tim->bitmap_ctrl & 0xfe;
449 indexn2 = elems->tim_len + indexn1 - 4;
450
451 if (index < indexn1 || index > indexn2)
452 return false;
453
454 index -= indexn1;
455
456 return !!(tim->virtual_map[index] & mask);
457 }
458
459 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
460 u16 capab, bool erp_valid, u8 erp)
461 {
462 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
463 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
464 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
465 #endif
466 u32 changed = 0;
467 bool use_protection;
468 bool use_short_preamble;
469 bool use_short_slot;
470
471 if (erp_valid) {
472 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
473 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
474 } else {
475 use_protection = false;
476 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
477 }
478
479 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
480
481 if (use_protection != bss_conf->use_cts_prot) {
482 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
483 if (net_ratelimit()) {
484 printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
485 sdata->dev->name,
486 use_protection ? "enabled" : "disabled",
487 ifmgd->bssid);
488 }
489 #endif
490 bss_conf->use_cts_prot = use_protection;
491 changed |= BSS_CHANGED_ERP_CTS_PROT;
492 }
493
494 if (use_short_preamble != bss_conf->use_short_preamble) {
495 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
496 if (net_ratelimit()) {
497 printk(KERN_DEBUG "%s: switched to %s barker preamble"
498 " (BSSID=%pM)\n",
499 sdata->dev->name,
500 use_short_preamble ? "short" : "long",
501 ifmgd->bssid);
502 }
503 #endif
504 bss_conf->use_short_preamble = use_short_preamble;
505 changed |= BSS_CHANGED_ERP_PREAMBLE;
506 }
507
508 if (use_short_slot != bss_conf->use_short_slot) {
509 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
510 if (net_ratelimit()) {
511 printk(KERN_DEBUG "%s: switched to %s slot time"
512 " (BSSID=%pM)\n",
513 sdata->dev->name,
514 use_short_slot ? "short" : "long",
515 ifmgd->bssid);
516 }
517 #endif
518 bss_conf->use_short_slot = use_short_slot;
519 changed |= BSS_CHANGED_ERP_SLOT;
520 }
521
522 return changed;
523 }
524
525 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata)
526 {
527 union iwreq_data wrqu;
528
529 memset(&wrqu, 0, sizeof(wrqu));
530 if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED)
531 memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN);
532 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
533 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
534 }
535
536 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata)
537 {
538 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
539 char *buf;
540 size_t len;
541 int i;
542 union iwreq_data wrqu;
543
544 if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies)
545 return;
546
547 buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len +
548 ifmgd->assocresp_ies_len), GFP_KERNEL);
549 if (!buf)
550 return;
551
552 len = sprintf(buf, "ASSOCINFO(");
553 if (ifmgd->assocreq_ies) {
554 len += sprintf(buf + len, "ReqIEs=");
555 for (i = 0; i < ifmgd->assocreq_ies_len; i++) {
556 len += sprintf(buf + len, "%02x",
557 ifmgd->assocreq_ies[i]);
558 }
559 }
560 if (ifmgd->assocresp_ies) {
561 if (ifmgd->assocreq_ies)
562 len += sprintf(buf + len, " ");
563 len += sprintf(buf + len, "RespIEs=");
564 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
565 len += sprintf(buf + len, "%02x",
566 ifmgd->assocresp_ies[i]);
567 }
568 }
569 len += sprintf(buf + len, ")");
570
571 if (len > IW_CUSTOM_MAX) {
572 len = sprintf(buf, "ASSOCRESPIE=");
573 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
574 len += sprintf(buf + len, "%02x",
575 ifmgd->assocresp_ies[i]);
576 }
577 }
578
579 if (len <= IW_CUSTOM_MAX) {
580 memset(&wrqu, 0, sizeof(wrqu));
581 wrqu.data.length = len;
582 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
583 }
584
585 kfree(buf);
586 }
587
588
589 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
590 u32 bss_info_changed)
591 {
592 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
593 struct ieee80211_local *local = sdata->local;
594 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
595
596 struct ieee80211_bss *bss;
597
598 bss_info_changed |= BSS_CHANGED_ASSOC;
599 ifmgd->flags |= IEEE80211_STA_ASSOCIATED;
600
601 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
602 conf->channel->center_freq,
603 ifmgd->ssid, ifmgd->ssid_len);
604 if (bss) {
605 /* set timing information */
606 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
607 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
608 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
609
610 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
611 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
612
613 cfg80211_hold_bss(&bss->cbss);
614
615 ieee80211_rx_bss_put(local, bss);
616 }
617
618 ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET;
619 memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN);
620 ieee80211_sta_send_associnfo(sdata);
621
622 ifmgd->last_probe = jiffies;
623 ieee80211_led_assoc(local, 1);
624
625 sdata->vif.bss_conf.assoc = 1;
626 /*
627 * For now just always ask the driver to update the basic rateset
628 * when we have associated, we aren't checking whether it actually
629 * changed or not.
630 */
631 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
632 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
633
634 if (local->powersave) {
635 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) &&
636 local->hw.conf.dynamic_ps_timeout > 0) {
637 mod_timer(&local->dynamic_ps_timer, jiffies +
638 msecs_to_jiffies(
639 local->hw.conf.dynamic_ps_timeout));
640 } else {
641 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
642 ieee80211_send_nullfunc(local, sdata, 1);
643 conf->flags |= IEEE80211_CONF_PS;
644 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
645 }
646 }
647
648 netif_tx_start_all_queues(sdata->dev);
649 netif_carrier_on(sdata->dev);
650
651 ieee80211_sta_send_apinfo(sdata);
652 }
653
654 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata)
655 {
656 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
657 struct ieee80211_local *local = sdata->local;
658
659 ifmgd->direct_probe_tries++;
660 if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
661 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
662 sdata->dev->name, ifmgd->bssid);
663 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
664 ieee80211_sta_send_apinfo(sdata);
665
666 /*
667 * Most likely AP is not in the range so remove the
668 * bss information associated to the AP
669 */
670 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
671 sdata->local->hw.conf.channel->center_freq,
672 ifmgd->ssid, ifmgd->ssid_len);
673
674 /*
675 * We might have a pending scan which had no chance to run yet
676 * due to state == IEEE80211_STA_MLME_DIRECT_PROBE.
677 * Hence, queue the STAs work again
678 */
679 queue_work(local->hw.workqueue, &ifmgd->work);
680 return;
681 }
682
683 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
684 sdata->dev->name, ifmgd->bssid,
685 ifmgd->direct_probe_tries);
686
687 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
688
689 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifmgd->request);
690
691 /* Direct probe is sent to broadcast address as some APs
692 * will not answer to direct packet in unassociated state.
693 */
694 ieee80211_send_probe_req(sdata, NULL,
695 ifmgd->ssid, ifmgd->ssid_len, NULL, 0);
696
697 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
698 }
699
700
701 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata)
702 {
703 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
704 struct ieee80211_local *local = sdata->local;
705 u8 *ies;
706 size_t ies_len;
707
708 ifmgd->auth_tries++;
709 if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
710 printk(KERN_DEBUG "%s: authentication with AP %pM"
711 " timed out\n",
712 sdata->dev->name, ifmgd->bssid);
713 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
714 ieee80211_sta_send_apinfo(sdata);
715 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
716 sdata->local->hw.conf.channel->center_freq,
717 ifmgd->ssid, ifmgd->ssid_len);
718
719 /*
720 * We might have a pending scan which had no chance to run yet
721 * due to state == IEEE80211_STA_MLME_AUTHENTICATE.
722 * Hence, queue the STAs work again
723 */
724 queue_work(local->hw.workqueue, &ifmgd->work);
725 return;
726 }
727
728 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
729 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
730 sdata->dev->name, ifmgd->bssid);
731
732 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
733 ies = ifmgd->sme_auth_ie;
734 ies_len = ifmgd->sme_auth_ie_len;
735 } else {
736 ies = NULL;
737 ies_len = 0;
738 }
739 ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ies, ies_len,
740 ifmgd->bssid, 0);
741 ifmgd->auth_transaction = 2;
742
743 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
744 }
745
746 /*
747 * The disassoc 'reason' argument can be either our own reason
748 * if self disconnected or a reason code from the AP.
749 */
750 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
751 bool deauth, bool self_disconnected,
752 u16 reason)
753 {
754 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
755 struct ieee80211_local *local = sdata->local;
756 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
757 struct ieee80211_bss *bss;
758 struct sta_info *sta;
759 u32 changed = 0, config_changed = 0;
760
761 rcu_read_lock();
762
763 sta = sta_info_get(local, ifmgd->bssid);
764 if (!sta) {
765 rcu_read_unlock();
766 return;
767 }
768
769 if (deauth) {
770 ifmgd->direct_probe_tries = 0;
771 ifmgd->auth_tries = 0;
772 }
773 ifmgd->assoc_scan_tries = 0;
774 ifmgd->assoc_tries = 0;
775
776 netif_tx_stop_all_queues(sdata->dev);
777 netif_carrier_off(sdata->dev);
778
779 ieee80211_sta_tear_down_BA_sessions(sta);
780
781 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
782 conf->channel->center_freq,
783 ifmgd->ssid, ifmgd->ssid_len);
784
785 if (bss) {
786 cfg80211_unhold_bss(&bss->cbss);
787 ieee80211_rx_bss_put(local, bss);
788 }
789
790 if (self_disconnected) {
791 if (deauth)
792 ieee80211_send_deauth_disassoc(sdata,
793 IEEE80211_STYPE_DEAUTH, reason);
794 else
795 ieee80211_send_deauth_disassoc(sdata,
796 IEEE80211_STYPE_DISASSOC, reason);
797 }
798
799 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
800 changed |= ieee80211_reset_erp_info(sdata);
801
802 ieee80211_led_assoc(local, 0);
803 changed |= BSS_CHANGED_ASSOC;
804 sdata->vif.bss_conf.assoc = false;
805
806 ieee80211_sta_send_apinfo(sdata);
807
808 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
809 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
810 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
811 sdata->local->hw.conf.channel->center_freq,
812 ifmgd->ssid, ifmgd->ssid_len);
813 }
814
815 rcu_read_unlock();
816
817 /* channel(_type) changes are handled by ieee80211_hw_config */
818 local->oper_channel_type = NL80211_CHAN_NO_HT;
819
820 local->power_constr_level = 0;
821
822 del_timer_sync(&local->dynamic_ps_timer);
823 cancel_work_sync(&local->dynamic_ps_enable_work);
824
825 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
826 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
827 config_changed |= IEEE80211_CONF_CHANGE_PS;
828 }
829
830 ieee80211_hw_config(local, config_changed);
831 ieee80211_bss_info_change_notify(sdata, changed);
832
833 rcu_read_lock();
834
835 sta = sta_info_get(local, ifmgd->bssid);
836 if (!sta) {
837 rcu_read_unlock();
838 return;
839 }
840
841 sta_info_unlink(&sta);
842
843 rcu_read_unlock();
844
845 sta_info_destroy(sta);
846 }
847
848 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
849 {
850 if (!sdata || !sdata->default_key ||
851 sdata->default_key->conf.alg != ALG_WEP)
852 return 0;
853 return 1;
854 }
855
856 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata)
857 {
858 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
859 struct ieee80211_local *local = sdata->local;
860 struct ieee80211_bss *bss;
861 int bss_privacy;
862 int wep_privacy;
863 int privacy_invoked;
864
865 if (!ifmgd || (ifmgd->flags & IEEE80211_STA_EXT_SME))
866 return 0;
867
868 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
869 local->hw.conf.channel->center_freq,
870 ifmgd->ssid, ifmgd->ssid_len);
871 if (!bss)
872 return 0;
873
874 bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY);
875 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
876 privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED);
877
878 ieee80211_rx_bss_put(local, bss);
879
880 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
881 return 0;
882
883 return 1;
884 }
885
886 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata)
887 {
888 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
889 struct ieee80211_local *local = sdata->local;
890
891 ifmgd->assoc_tries++;
892 if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
893 printk(KERN_DEBUG "%s: association with AP %pM"
894 " timed out\n",
895 sdata->dev->name, ifmgd->bssid);
896 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
897 ieee80211_sta_send_apinfo(sdata);
898 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
899 sdata->local->hw.conf.channel->center_freq,
900 ifmgd->ssid, ifmgd->ssid_len);
901 /*
902 * We might have a pending scan which had no chance to run yet
903 * due to state == IEEE80211_STA_MLME_ASSOCIATE.
904 * Hence, queue the STAs work again
905 */
906 queue_work(local->hw.workqueue, &ifmgd->work);
907 return;
908 }
909
910 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
911 printk(KERN_DEBUG "%s: associate with AP %pM\n",
912 sdata->dev->name, ifmgd->bssid);
913 if (ieee80211_privacy_mismatch(sdata)) {
914 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
915 "mixed-cell disabled - abort association\n", sdata->dev->name);
916 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
917 return;
918 }
919
920 ieee80211_send_assoc(sdata);
921
922 mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
923 }
924
925 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
926 struct ieee80211_hdr *hdr)
927 {
928 /*
929 * We can postpone the mgd.timer whenever receiving unicast frames
930 * from AP because we know that the connection is working both ways
931 * at that time. But multicast frames (and hence also beacons) must
932 * be ignored here, because we need to trigger the timer during
933 * data idle periods for sending the periodical probe request to
934 * the AP.
935 */
936 if (!is_multicast_ether_addr(hdr->addr1))
937 mod_timer(&sdata->u.mgd.timer,
938 jiffies + IEEE80211_MONITORING_INTERVAL);
939 }
940
941 void ieee80211_beacon_loss_work(struct work_struct *work)
942 {
943 struct ieee80211_sub_if_data *sdata =
944 container_of(work, struct ieee80211_sub_if_data,
945 u.mgd.beacon_loss_work);
946 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
947
948 printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM "
949 "- sending probe request\n", sdata->dev->name,
950 sdata->u.mgd.bssid);
951
952 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
953 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
954 ifmgd->ssid_len, NULL, 0);
955
956 mod_timer(&ifmgd->timer, jiffies + IEEE80211_MONITORING_INTERVAL);
957 }
958
959 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
960 {
961 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
962
963 queue_work(sdata->local->hw.workqueue,
964 &sdata->u.mgd.beacon_loss_work);
965 }
966 EXPORT_SYMBOL(ieee80211_beacon_loss);
967
968 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
969 {
970 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
971 struct ieee80211_local *local = sdata->local;
972 struct sta_info *sta;
973 bool disassoc = false;
974
975 /* TODO: start monitoring current AP signal quality and number of
976 * missed beacons. Scan other channels every now and then and search
977 * for better APs. */
978 /* TODO: remove expired BSSes */
979
980 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED;
981
982 rcu_read_lock();
983
984 sta = sta_info_get(local, ifmgd->bssid);
985 if (!sta) {
986 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
987 sdata->dev->name, ifmgd->bssid);
988 disassoc = true;
989 goto unlock;
990 }
991
992 if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) &&
993 time_after(jiffies, sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
994 printk(KERN_DEBUG "%s: no probe response from AP %pM "
995 "- disassociating\n",
996 sdata->dev->name, ifmgd->bssid);
997 disassoc = true;
998 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
999 goto unlock;
1000 }
1001
1002 /*
1003 * Beacon filtering is only enabled with power save and then the
1004 * stack should not check for beacon loss.
1005 */
1006 if (!((local->hw.flags & IEEE80211_HW_BEACON_FILTER) &&
1007 (local->hw.conf.flags & IEEE80211_CONF_PS)) &&
1008 time_after(jiffies,
1009 ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) {
1010 printk(KERN_DEBUG "%s: beacon loss from AP %pM "
1011 "- sending probe request\n",
1012 sdata->dev->name, ifmgd->bssid);
1013 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1014 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1015 ifmgd->ssid_len, NULL, 0);
1016 goto unlock;
1017
1018 }
1019
1020 if (time_after(jiffies, sta->last_rx + IEEE80211_PROBE_IDLE_TIME)) {
1021 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1022 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1023 ifmgd->ssid_len, NULL, 0);
1024 }
1025
1026 unlock:
1027 rcu_read_unlock();
1028
1029 if (disassoc)
1030 ieee80211_set_disassoc(sdata, true, true,
1031 WLAN_REASON_PREV_AUTH_NOT_VALID);
1032 else
1033 mod_timer(&ifmgd->timer, jiffies +
1034 IEEE80211_MONITORING_INTERVAL);
1035 }
1036
1037
1038 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata)
1039 {
1040 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1041
1042 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1043 ifmgd->flags |= IEEE80211_STA_AUTHENTICATED;
1044 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1045 /* Wait for SME to request association */
1046 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1047 } else
1048 ieee80211_associate(sdata);
1049 }
1050
1051
1052 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1053 struct ieee80211_mgmt *mgmt,
1054 size_t len)
1055 {
1056 u8 *pos;
1057 struct ieee802_11_elems elems;
1058
1059 pos = mgmt->u.auth.variable;
1060 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1061 if (!elems.challenge)
1062 return;
1063 ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg,
1064 elems.challenge - 2, elems.challenge_len + 2,
1065 sdata->u.mgd.bssid, 1);
1066 sdata->u.mgd.auth_transaction = 4;
1067 }
1068
1069 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1070 struct ieee80211_mgmt *mgmt,
1071 size_t len)
1072 {
1073 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1074 u16 auth_alg, auth_transaction, status_code;
1075
1076 if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE)
1077 return;
1078
1079 if (len < 24 + 6)
1080 return;
1081
1082 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1083 return;
1084
1085 if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1086 return;
1087
1088 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1089 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1090 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1091
1092 if (auth_alg != ifmgd->auth_alg ||
1093 auth_transaction != ifmgd->auth_transaction)
1094 return;
1095
1096 if (status_code != WLAN_STATUS_SUCCESS) {
1097 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1098 u8 algs[3];
1099 const int num_algs = ARRAY_SIZE(algs);
1100 int i, pos;
1101 algs[0] = algs[1] = algs[2] = 0xff;
1102 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1103 algs[0] = WLAN_AUTH_OPEN;
1104 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1105 algs[1] = WLAN_AUTH_SHARED_KEY;
1106 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1107 algs[2] = WLAN_AUTH_LEAP;
1108 if (ifmgd->auth_alg == WLAN_AUTH_OPEN)
1109 pos = 0;
1110 else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY)
1111 pos = 1;
1112 else
1113 pos = 2;
1114 for (i = 0; i < num_algs; i++) {
1115 pos++;
1116 if (pos >= num_algs)
1117 pos = 0;
1118 if (algs[pos] == ifmgd->auth_alg ||
1119 algs[pos] == 0xff)
1120 continue;
1121 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1122 !ieee80211_sta_wep_configured(sdata))
1123 continue;
1124 ifmgd->auth_alg = algs[pos];
1125 break;
1126 }
1127 }
1128 return;
1129 }
1130
1131 switch (ifmgd->auth_alg) {
1132 case WLAN_AUTH_OPEN:
1133 case WLAN_AUTH_LEAP:
1134 case WLAN_AUTH_FT:
1135 ieee80211_auth_completed(sdata);
1136 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1137 break;
1138 case WLAN_AUTH_SHARED_KEY:
1139 if (ifmgd->auth_transaction == 4) {
1140 ieee80211_auth_completed(sdata);
1141 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1142 } else
1143 ieee80211_auth_challenge(sdata, mgmt, len);
1144 break;
1145 }
1146 }
1147
1148
1149 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1150 struct ieee80211_mgmt *mgmt,
1151 size_t len)
1152 {
1153 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1154 u16 reason_code;
1155
1156 if (len < 24 + 2)
1157 return;
1158
1159 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1160 return;
1161
1162 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1163
1164 if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED)
1165 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1166 sdata->dev->name, reason_code);
1167
1168 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1169 (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1170 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE ||
1171 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) {
1172 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1173 mod_timer(&ifmgd->timer, jiffies +
1174 IEEE80211_RETRY_AUTH_INTERVAL);
1175 }
1176
1177 ieee80211_set_disassoc(sdata, true, false, 0);
1178 ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED;
1179 cfg80211_send_rx_deauth(sdata->dev, (u8 *) mgmt, len);
1180 }
1181
1182
1183 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1184 struct ieee80211_mgmt *mgmt,
1185 size_t len)
1186 {
1187 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1188 u16 reason_code;
1189
1190 if (len < 24 + 2)
1191 return;
1192
1193 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1194 return;
1195
1196 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1197
1198 if (ifmgd->flags & IEEE80211_STA_ASSOCIATED)
1199 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1200 sdata->dev->name, reason_code);
1201
1202 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1203 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1204 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1205 mod_timer(&ifmgd->timer, jiffies +
1206 IEEE80211_RETRY_AUTH_INTERVAL);
1207 }
1208
1209 ieee80211_set_disassoc(sdata, false, false, reason_code);
1210 cfg80211_send_rx_disassoc(sdata->dev, (u8 *) mgmt, len);
1211 }
1212
1213
1214 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1215 struct ieee80211_mgmt *mgmt,
1216 size_t len,
1217 int reassoc)
1218 {
1219 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1220 struct ieee80211_local *local = sdata->local;
1221 struct ieee80211_supported_band *sband;
1222 struct sta_info *sta;
1223 u32 rates, basic_rates;
1224 u16 capab_info, status_code, aid;
1225 struct ieee802_11_elems elems;
1226 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1227 u8 *pos;
1228 u32 changed = 0;
1229 int i, j;
1230 bool have_higher_than_11mbit = false, newsta = false;
1231 u16 ap_ht_cap_flags;
1232
1233 /* AssocResp and ReassocResp have identical structure, so process both
1234 * of them in this function. */
1235
1236 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1237 return;
1238
1239 if (len < 24 + 6)
1240 return;
1241
1242 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1243 return;
1244
1245 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1246 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1247 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1248
1249 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1250 "status=%d aid=%d)\n",
1251 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1252 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1253
1254 pos = mgmt->u.assoc_resp.variable;
1255 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1256
1257 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1258 elems.timeout_int && elems.timeout_int_len == 5 &&
1259 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1260 u32 tu, ms;
1261 tu = get_unaligned_le32(elems.timeout_int + 1);
1262 ms = tu * 1024 / 1000;
1263 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1264 "comeback duration %u TU (%u ms)\n",
1265 sdata->dev->name, tu, ms);
1266 if (ms > IEEE80211_ASSOC_TIMEOUT)
1267 mod_timer(&ifmgd->timer,
1268 jiffies + msecs_to_jiffies(ms));
1269 return;
1270 }
1271
1272 if (status_code != WLAN_STATUS_SUCCESS) {
1273 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1274 sdata->dev->name, status_code);
1275 /* if this was a reassociation, ensure we try a "full"
1276 * association next time. This works around some broken APs
1277 * which do not correctly reject reassociation requests. */
1278 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1279 return;
1280 }
1281
1282 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1283 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1284 "set\n", sdata->dev->name, aid);
1285 aid &= ~(BIT(15) | BIT(14));
1286
1287 if (!elems.supp_rates) {
1288 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1289 sdata->dev->name);
1290 return;
1291 }
1292
1293 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1294 ifmgd->aid = aid;
1295 ifmgd->ap_capab = capab_info;
1296
1297 kfree(ifmgd->assocresp_ies);
1298 ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1299 ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL);
1300 if (ifmgd->assocresp_ies)
1301 memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len);
1302
1303 rcu_read_lock();
1304
1305 /* Add STA entry for the AP */
1306 sta = sta_info_get(local, ifmgd->bssid);
1307 if (!sta) {
1308 newsta = true;
1309
1310 sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC);
1311 if (!sta) {
1312 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1313 " the AP\n", sdata->dev->name);
1314 rcu_read_unlock();
1315 return;
1316 }
1317
1318 /* update new sta with its last rx activity */
1319 sta->last_rx = jiffies;
1320 }
1321
1322 /*
1323 * FIXME: Do we really need to update the sta_info's information here?
1324 * We already know about the AP (we found it in our list) so it
1325 * should already be filled with the right info, no?
1326 * As is stands, all this is racy because typically we assume
1327 * the information that is filled in here (except flags) doesn't
1328 * change while a STA structure is alive. As such, it should move
1329 * to between the sta_info_alloc() and sta_info_insert() above.
1330 */
1331
1332 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1333 WLAN_STA_AUTHORIZED);
1334
1335 rates = 0;
1336 basic_rates = 0;
1337 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1338
1339 for (i = 0; i < elems.supp_rates_len; i++) {
1340 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1341 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1342
1343 if (rate > 110)
1344 have_higher_than_11mbit = true;
1345
1346 for (j = 0; j < sband->n_bitrates; j++) {
1347 if (sband->bitrates[j].bitrate == rate) {
1348 rates |= BIT(j);
1349 if (is_basic)
1350 basic_rates |= BIT(j);
1351 break;
1352 }
1353 }
1354 }
1355
1356 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1357 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1358 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1359
1360 if (rate > 110)
1361 have_higher_than_11mbit = true;
1362
1363 for (j = 0; j < sband->n_bitrates; j++) {
1364 if (sband->bitrates[j].bitrate == rate) {
1365 rates |= BIT(j);
1366 if (is_basic)
1367 basic_rates |= BIT(j);
1368 break;
1369 }
1370 }
1371 }
1372
1373 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1374 sdata->vif.bss_conf.basic_rates = basic_rates;
1375
1376 /* cf. IEEE 802.11 9.2.12 */
1377 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1378 have_higher_than_11mbit)
1379 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1380 else
1381 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1382
1383 /* If TKIP/WEP is used, no need to parse AP's HT capabilities */
1384 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1385 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1386 elems.ht_cap_elem, &sta->sta.ht_cap);
1387
1388 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1389
1390 rate_control_rate_init(sta);
1391
1392 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1393 set_sta_flags(sta, WLAN_STA_MFP);
1394
1395 if (elems.wmm_param)
1396 set_sta_flags(sta, WLAN_STA_WME);
1397
1398 if (newsta) {
1399 int err = sta_info_insert(sta);
1400 if (err) {
1401 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1402 " the AP (error %d)\n", sdata->dev->name, err);
1403 rcu_read_unlock();
1404 return;
1405 }
1406 }
1407
1408 rcu_read_unlock();
1409
1410 if (elems.wmm_param)
1411 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1412 elems.wmm_param_len);
1413
1414 if (elems.ht_info_elem && elems.wmm_param &&
1415 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1416 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1417 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1418 ap_ht_cap_flags);
1419
1420 /* set AID and assoc capability,
1421 * ieee80211_set_associated() will tell the driver */
1422 bss_conf->aid = aid;
1423 bss_conf->assoc_capability = capab_info;
1424 ieee80211_set_associated(sdata, changed);
1425
1426 /*
1427 * initialise the time of last beacon to be the association time,
1428 * otherwise beacon loss check will trigger immediately
1429 */
1430 ifmgd->last_beacon = jiffies;
1431
1432 ieee80211_associated(sdata);
1433 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1434 }
1435
1436
1437 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1438 struct ieee80211_mgmt *mgmt,
1439 size_t len,
1440 struct ieee80211_rx_status *rx_status,
1441 struct ieee802_11_elems *elems,
1442 bool beacon)
1443 {
1444 struct ieee80211_local *local = sdata->local;
1445 int freq;
1446 struct ieee80211_bss *bss;
1447 struct ieee80211_channel *channel;
1448
1449 if (elems->ds_params && elems->ds_params_len == 1)
1450 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1451 else
1452 freq = rx_status->freq;
1453
1454 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1455
1456 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1457 return;
1458
1459 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1460 channel, beacon);
1461 if (!bss)
1462 return;
1463
1464 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1465 (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) {
1466 struct ieee80211_channel_sw_ie *sw_elem =
1467 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1468 ieee80211_process_chanswitch(sdata, sw_elem, bss);
1469 }
1470
1471 ieee80211_rx_bss_put(local, bss);
1472 }
1473
1474
1475 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1476 struct ieee80211_mgmt *mgmt,
1477 size_t len,
1478 struct ieee80211_rx_status *rx_status)
1479 {
1480 struct ieee80211_if_managed *ifmgd;
1481 size_t baselen;
1482 struct ieee802_11_elems elems;
1483
1484 ifmgd = &sdata->u.mgd;
1485
1486 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1487 return; /* ignore ProbeResp to foreign address */
1488
1489 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1490 if (baselen > len)
1491 return;
1492
1493 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1494 &elems);
1495
1496 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1497
1498 /* direct probe may be part of the association flow */
1499 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1500 &ifmgd->request)) {
1501 printk(KERN_DEBUG "%s direct probe responded\n",
1502 sdata->dev->name);
1503 ieee80211_authenticate(sdata);
1504 }
1505
1506 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
1507 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1508 }
1509
1510 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1511 struct ieee80211_mgmt *mgmt,
1512 size_t len,
1513 struct ieee80211_rx_status *rx_status)
1514 {
1515 struct ieee80211_if_managed *ifmgd;
1516 size_t baselen;
1517 struct ieee802_11_elems elems;
1518 struct ieee80211_local *local = sdata->local;
1519 u32 changed = 0;
1520 bool erp_valid, directed_tim;
1521 u8 erp_value = 0;
1522
1523 /* Process beacon from the current BSS */
1524 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1525 if (baselen > len)
1526 return;
1527
1528 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1529
1530 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
1531
1532 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1533 return;
1534
1535 ifmgd = &sdata->u.mgd;
1536
1537 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) ||
1538 memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1539 return;
1540
1541 if (rx_status->freq != local->hw.conf.channel->center_freq)
1542 return;
1543
1544 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1545 elems.wmm_param_len);
1546
1547 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1548 directed_tim = ieee80211_check_tim(&elems, ifmgd->aid);
1549
1550 if (directed_tim) {
1551 if (local->hw.conf.dynamic_ps_timeout > 0) {
1552 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1553 ieee80211_hw_config(local,
1554 IEEE80211_CONF_CHANGE_PS);
1555 ieee80211_send_nullfunc(local, sdata, 0);
1556 } else {
1557 local->pspolling = true;
1558
1559 /*
1560 * Here is assumed that the driver will be
1561 * able to send ps-poll frame and receive a
1562 * response even though power save mode is
1563 * enabled, but some drivers might require
1564 * to disable power save here. This needs
1565 * to be investigated.
1566 */
1567 ieee80211_send_pspoll(local, sdata);
1568 }
1569 }
1570 }
1571
1572 if (elems.erp_info && elems.erp_info_len >= 1) {
1573 erp_valid = true;
1574 erp_value = elems.erp_info[0];
1575 } else {
1576 erp_valid = false;
1577 }
1578 changed |= ieee80211_handle_bss_capability(sdata,
1579 le16_to_cpu(mgmt->u.beacon.capab_info),
1580 erp_valid, erp_value);
1581
1582
1583 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1584 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) {
1585 struct sta_info *sta;
1586 struct ieee80211_supported_band *sband;
1587 u16 ap_ht_cap_flags;
1588
1589 rcu_read_lock();
1590
1591 sta = sta_info_get(local, ifmgd->bssid);
1592 if (!sta) {
1593 rcu_read_unlock();
1594 return;
1595 }
1596
1597 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1598
1599 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1600 elems.ht_cap_elem, &sta->sta.ht_cap);
1601
1602 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1603
1604 rcu_read_unlock();
1605
1606 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1607 ap_ht_cap_flags);
1608 }
1609
1610 if (elems.country_elem) {
1611 /* Note we are only reviewing this on beacons
1612 * for the BSSID we are associated to */
1613 regulatory_hint_11d(local->hw.wiphy,
1614 elems.country_elem, elems.country_elem_len);
1615
1616 /* TODO: IBSS also needs this */
1617 if (elems.pwr_constr_elem)
1618 ieee80211_handle_pwr_constr(sdata,
1619 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1620 elems.pwr_constr_elem,
1621 elems.pwr_constr_elem_len);
1622 }
1623
1624 ieee80211_bss_info_change_notify(sdata, changed);
1625 }
1626
1627 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1628 struct sk_buff *skb,
1629 struct ieee80211_rx_status *rx_status)
1630 {
1631 struct ieee80211_local *local = sdata->local;
1632 struct ieee80211_mgmt *mgmt;
1633 u16 fc;
1634
1635 if (skb->len < 24)
1636 return RX_DROP_MONITOR;
1637
1638 mgmt = (struct ieee80211_mgmt *) skb->data;
1639 fc = le16_to_cpu(mgmt->frame_control);
1640
1641 switch (fc & IEEE80211_FCTL_STYPE) {
1642 case IEEE80211_STYPE_PROBE_REQ:
1643 case IEEE80211_STYPE_PROBE_RESP:
1644 case IEEE80211_STYPE_BEACON:
1645 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1646 case IEEE80211_STYPE_AUTH:
1647 case IEEE80211_STYPE_ASSOC_RESP:
1648 case IEEE80211_STYPE_REASSOC_RESP:
1649 case IEEE80211_STYPE_DEAUTH:
1650 case IEEE80211_STYPE_DISASSOC:
1651 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1652 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
1653 return RX_QUEUED;
1654 }
1655
1656 return RX_DROP_MONITOR;
1657 }
1658
1659 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1660 struct sk_buff *skb)
1661 {
1662 struct ieee80211_rx_status *rx_status;
1663 struct ieee80211_mgmt *mgmt;
1664 u16 fc;
1665
1666 rx_status = (struct ieee80211_rx_status *) skb->cb;
1667 mgmt = (struct ieee80211_mgmt *) skb->data;
1668 fc = le16_to_cpu(mgmt->frame_control);
1669
1670 switch (fc & IEEE80211_FCTL_STYPE) {
1671 case IEEE80211_STYPE_PROBE_RESP:
1672 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
1673 rx_status);
1674 break;
1675 case IEEE80211_STYPE_BEACON:
1676 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1677 rx_status);
1678 break;
1679 case IEEE80211_STYPE_AUTH:
1680 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
1681 break;
1682 case IEEE80211_STYPE_ASSOC_RESP:
1683 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0);
1684 break;
1685 case IEEE80211_STYPE_REASSOC_RESP:
1686 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1);
1687 break;
1688 case IEEE80211_STYPE_DEAUTH:
1689 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1690 break;
1691 case IEEE80211_STYPE_DISASSOC:
1692 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1693 break;
1694 }
1695
1696 kfree_skb(skb);
1697 }
1698
1699 static void ieee80211_sta_timer(unsigned long data)
1700 {
1701 struct ieee80211_sub_if_data *sdata =
1702 (struct ieee80211_sub_if_data *) data;
1703 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1704 struct ieee80211_local *local = sdata->local;
1705
1706 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1707 queue_work(local->hw.workqueue, &ifmgd->work);
1708 }
1709
1710 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata)
1711 {
1712 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1713 struct ieee80211_local *local = sdata->local;
1714
1715 if (local->ops->reset_tsf) {
1716 /* Reset own TSF to allow time synchronization work. */
1717 local->ops->reset_tsf(local_to_hw(local));
1718 }
1719
1720 ifmgd->wmm_last_param_set = -1; /* allow any WMM update */
1721
1722
1723 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1724 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1725 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1726 ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY;
1727 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1728 ifmgd->auth_alg = WLAN_AUTH_LEAP;
1729 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_FT)
1730 ifmgd->auth_alg = WLAN_AUTH_FT;
1731 else
1732 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1733 ifmgd->auth_transaction = -1;
1734 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
1735 ifmgd->assoc_scan_tries = 0;
1736 ifmgd->direct_probe_tries = 0;
1737 ifmgd->auth_tries = 0;
1738 ifmgd->assoc_tries = 0;
1739 netif_tx_stop_all_queues(sdata->dev);
1740 netif_carrier_off(sdata->dev);
1741 }
1742
1743 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata)
1744 {
1745 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1746 struct ieee80211_local *local = sdata->local;
1747 struct ieee80211_bss *bss;
1748 u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid;
1749 u8 ssid_len = ifmgd->ssid_len;
1750 u16 capa_mask = WLAN_CAPABILITY_ESS;
1751 u16 capa_val = WLAN_CAPABILITY_ESS;
1752 struct ieee80211_channel *chan = local->oper_channel;
1753
1754 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1755 ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL |
1756 IEEE80211_STA_AUTO_BSSID_SEL |
1757 IEEE80211_STA_AUTO_CHANNEL_SEL)) {
1758 capa_mask |= WLAN_CAPABILITY_PRIVACY;
1759 if (sdata->default_key)
1760 capa_val |= WLAN_CAPABILITY_PRIVACY;
1761 }
1762
1763 if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
1764 chan = NULL;
1765
1766 if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL)
1767 bssid = NULL;
1768
1769 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) {
1770 ssid = NULL;
1771 ssid_len = 0;
1772 }
1773
1774 bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
1775 bssid, ssid, ssid_len,
1776 capa_mask, capa_val);
1777
1778 if (bss) {
1779 ieee80211_set_freq(sdata, bss->cbss.channel->center_freq);
1780 if (!(ifmgd->flags & IEEE80211_STA_SSID_SET))
1781 ieee80211_sta_set_ssid(sdata, bss->ssid,
1782 bss->ssid_len);
1783 ieee80211_sta_set_bssid(sdata, bss->cbss.bssid);
1784 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
1785 bss->supp_rates);
1786 if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED)
1787 sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED;
1788 else
1789 sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED;
1790
1791 /* Send out direct probe if no probe resp was received or
1792 * the one we have is outdated
1793 */
1794 if (!bss->last_probe_resp ||
1795 time_after(jiffies, bss->last_probe_resp
1796 + IEEE80211_SCAN_RESULT_EXPIRE))
1797 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1798 else
1799 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
1800
1801 ieee80211_rx_bss_put(local, bss);
1802 ieee80211_sta_reset_auth(sdata);
1803 return 0;
1804 } else {
1805 if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
1806 ifmgd->assoc_scan_tries++;
1807 /* XXX maybe racy? */
1808 if (local->scan_req)
1809 return -1;
1810 memcpy(local->int_scan_req.ssids[0].ssid,
1811 ifmgd->ssid, IEEE80211_MAX_SSID_LEN);
1812 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL)
1813 local->int_scan_req.ssids[0].ssid_len = 0;
1814 else
1815 local->int_scan_req.ssids[0].ssid_len = ifmgd->ssid_len;
1816
1817 if (ieee80211_start_scan(sdata, &local->int_scan_req))
1818 ieee80211_scan_failed(local);
1819
1820 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
1821 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
1822 } else {
1823 ifmgd->assoc_scan_tries = 0;
1824 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1825 }
1826 }
1827 return -1;
1828 }
1829
1830
1831 static void ieee80211_sta_work(struct work_struct *work)
1832 {
1833 struct ieee80211_sub_if_data *sdata =
1834 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
1835 struct ieee80211_local *local = sdata->local;
1836 struct ieee80211_if_managed *ifmgd;
1837 struct sk_buff *skb;
1838
1839 if (!netif_running(sdata->dev))
1840 return;
1841
1842 if (local->sw_scanning || local->hw_scanning)
1843 return;
1844
1845 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1846 return;
1847 ifmgd = &sdata->u.mgd;
1848
1849 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
1850 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1851
1852 if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
1853 ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE &&
1854 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE &&
1855 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) {
1856 /*
1857 * The call to ieee80211_start_scan can fail but ieee80211_request_scan
1858 * (which queued ieee80211_sta_work) did not return an error. Thus, call
1859 * ieee80211_scan_failed here if ieee80211_start_scan fails in order to
1860 * notify the scan requester.
1861 */
1862 if (ieee80211_start_scan(sdata, local->scan_req))
1863 ieee80211_scan_failed(local);
1864 return;
1865 }
1866
1867 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) {
1868 if (ieee80211_sta_config_auth(sdata))
1869 return;
1870 clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1871 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request))
1872 return;
1873
1874 switch (ifmgd->state) {
1875 case IEEE80211_STA_MLME_DISABLED:
1876 break;
1877 case IEEE80211_STA_MLME_DIRECT_PROBE:
1878 ieee80211_direct_probe(sdata);
1879 break;
1880 case IEEE80211_STA_MLME_AUTHENTICATE:
1881 ieee80211_authenticate(sdata);
1882 break;
1883 case IEEE80211_STA_MLME_ASSOCIATE:
1884 ieee80211_associate(sdata);
1885 break;
1886 case IEEE80211_STA_MLME_ASSOCIATED:
1887 ieee80211_associated(sdata);
1888 break;
1889 default:
1890 WARN_ON(1);
1891 break;
1892 }
1893
1894 if (ieee80211_privacy_mismatch(sdata)) {
1895 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
1896 "mixed-cell disabled - disassociate\n", sdata->dev->name);
1897
1898 ieee80211_set_disassoc(sdata, false, true,
1899 WLAN_REASON_UNSPECIFIED);
1900 }
1901 }
1902
1903 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
1904 {
1905 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1906 queue_work(sdata->local->hw.workqueue,
1907 &sdata->u.mgd.work);
1908 }
1909
1910 /* interface setup */
1911 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
1912 {
1913 struct ieee80211_if_managed *ifmgd;
1914
1915 ifmgd = &sdata->u.mgd;
1916 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
1917 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1918 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
1919 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
1920 (unsigned long) sdata);
1921 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
1922 (unsigned long) sdata);
1923 skb_queue_head_init(&ifmgd->skb_queue);
1924
1925 ifmgd->capab = WLAN_CAPABILITY_ESS;
1926 ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN |
1927 IEEE80211_AUTH_ALG_SHARED_KEY;
1928 ifmgd->flags |= IEEE80211_STA_CREATE_IBSS |
1929 IEEE80211_STA_AUTO_BSSID_SEL |
1930 IEEE80211_STA_AUTO_CHANNEL_SEL;
1931 if (sdata->local->hw.queues >= 4)
1932 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
1933 }
1934
1935 /* configuration hooks */
1936 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata)
1937 {
1938 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1939 struct ieee80211_local *local = sdata->local;
1940
1941 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1942 return;
1943
1944 if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET |
1945 IEEE80211_STA_AUTO_BSSID_SEL)) &&
1946 (ifmgd->flags & (IEEE80211_STA_SSID_SET |
1947 IEEE80211_STA_AUTO_SSID_SEL))) {
1948
1949 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)
1950 ieee80211_set_disassoc(sdata, true, true,
1951 WLAN_REASON_DEAUTH_LEAVING);
1952
1953 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) ||
1954 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1955 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
1956 else if (ifmgd->flags & IEEE80211_STA_EXT_SME)
1957 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1958 queue_work(local->hw.workqueue, &ifmgd->work);
1959 }
1960 }
1961
1962 int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata)
1963 {
1964 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1965
1966 if (ifmgd->ssid_len)
1967 ifmgd->flags |= IEEE80211_STA_SSID_SET;
1968 else
1969 ifmgd->flags &= ~IEEE80211_STA_SSID_SET;
1970
1971 return 0;
1972 }
1973
1974 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
1975 {
1976 struct ieee80211_if_managed *ifmgd;
1977
1978 if (len > IEEE80211_MAX_SSID_LEN)
1979 return -EINVAL;
1980
1981 ifmgd = &sdata->u.mgd;
1982
1983 if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) {
1984 /*
1985 * Do not use reassociation if SSID is changed (different ESS).
1986 */
1987 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1988 memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid));
1989 memcpy(ifmgd->ssid, ssid, len);
1990 ifmgd->ssid_len = len;
1991 }
1992
1993 return ieee80211_sta_commit(sdata);
1994 }
1995
1996 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
1997 {
1998 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1999 memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len);
2000 *len = ifmgd->ssid_len;
2001 return 0;
2002 }
2003
2004 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2005 {
2006 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2007
2008 if (is_valid_ether_addr(bssid)) {
2009 memcpy(ifmgd->bssid, bssid, ETH_ALEN);
2010 ifmgd->flags |= IEEE80211_STA_BSSID_SET;
2011 } else {
2012 memset(ifmgd->bssid, 0, ETH_ALEN);
2013 ifmgd->flags &= ~IEEE80211_STA_BSSID_SET;
2014 }
2015
2016 if (netif_running(sdata->dev)) {
2017 if (ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID)) {
2018 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2019 "the low-level driver\n", sdata->dev->name);
2020 }
2021 }
2022
2023 return ieee80211_sta_commit(sdata);
2024 }
2025
2026 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
2027 const char *ie, size_t len)
2028 {
2029 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2030
2031 kfree(ifmgd->extra_ie);
2032 if (len == 0) {
2033 ifmgd->extra_ie = NULL;
2034 ifmgd->extra_ie_len = 0;
2035 return 0;
2036 }
2037 ifmgd->extra_ie = kmalloc(len, GFP_KERNEL);
2038 if (!ifmgd->extra_ie) {
2039 ifmgd->extra_ie_len = 0;
2040 return -ENOMEM;
2041 }
2042 memcpy(ifmgd->extra_ie, ie, len);
2043 ifmgd->extra_ie_len = len;
2044 return 0;
2045 }
2046
2047 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2048 {
2049 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2050 sdata->dev->name, reason);
2051
2052 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2053 return -EINVAL;
2054
2055 ieee80211_set_disassoc(sdata, true, true, reason);
2056 return 0;
2057 }
2058
2059 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2060 {
2061 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2062
2063 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2064 sdata->dev->name, reason);
2065
2066 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2067 return -EINVAL;
2068
2069 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED))
2070 return -ENOLINK;
2071
2072 ieee80211_set_disassoc(sdata, false, true, reason);
2073 return 0;
2074 }
2075
2076 /* scan finished notification */
2077 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2078 {
2079 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2080
2081 /* Restart STA timers */
2082 rcu_read_lock();
2083 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2084 ieee80211_restart_sta_timer(sdata);
2085 rcu_read_unlock();
2086 }
2087
2088 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
2089 {
2090 struct ieee80211_local *local =
2091 container_of(work, struct ieee80211_local,
2092 dynamic_ps_disable_work);
2093
2094 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2095 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2096 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2097 }
2098
2099 ieee80211_wake_queues_by_reason(&local->hw,
2100 IEEE80211_QUEUE_STOP_REASON_PS);
2101 }
2102
2103 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
2104 {
2105 struct ieee80211_local *local =
2106 container_of(work, struct ieee80211_local,
2107 dynamic_ps_enable_work);
2108 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2109
2110 if (local->hw.conf.flags & IEEE80211_CONF_PS)
2111 return;
2112
2113 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
2114 ieee80211_send_nullfunc(local, sdata, 1);
2115
2116 local->hw.conf.flags |= IEEE80211_CONF_PS;
2117 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2118 }
2119
2120 void ieee80211_dynamic_ps_timer(unsigned long data)
2121 {
2122 struct ieee80211_local *local = (void *) data;
2123
2124 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
2125 }
2126
2127 void ieee80211_send_nullfunc(struct ieee80211_local *local,
2128 struct ieee80211_sub_if_data *sdata,
2129 int powersave)
2130 {
2131 struct sk_buff *skb;
2132 struct ieee80211_hdr *nullfunc;
2133 __le16 fc;
2134
2135 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2136 return;
2137
2138 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
2139 if (!skb) {
2140 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
2141 "frame\n", sdata->dev->name);
2142 return;
2143 }
2144 skb_reserve(skb, local->hw.extra_tx_headroom);
2145
2146 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
2147 memset(nullfunc, 0, 24);
2148 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
2149 IEEE80211_FCTL_TODS);
2150 if (powersave)
2151 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
2152 nullfunc->frame_control = fc;
2153 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2154 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
2155 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
2156
2157 ieee80211_tx_skb(sdata, skb, 0);
2158 }
Linux kernel - Deliverables
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