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nl80211: Add MLME primitives to support external SME
[linux-2.6/linux-2.6-openrd.git] / net / mac80211 / mlme.c
blobd1bcc843877262baaeeb7e4bf56469e7755b102b
1 /*
2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/rtnetlink.h>
20 #include <net/mac80211.h>
21 #include <asm/unaligned.h>
22
23 #include "ieee80211_i.h"
24 #include "rate.h"
25 #include "led.h"
26
27 #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
28 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
29 #define IEEE80211_AUTH_MAX_TRIES 3
30 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
31 #define IEEE80211_ASSOC_MAX_TRIES 3
32 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
33 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
34 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
35
36 /* utils */
37 static int ecw2cw(int ecw)
38 {
39 return (1 << ecw) - 1;
40 }
41
42 static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
43 {
44 u8 *end, *pos;
45
46 pos = bss->cbss.information_elements;
47 if (pos == NULL)
48 return NULL;
49 end = pos + bss->cbss.len_information_elements;
50
51 while (pos + 1 < end) {
52 if (pos + 2 + pos[1] > end)
53 break;
54 if (pos[0] == ie)
55 return pos;
56 pos += 2 + pos[1];
57 }
58
59 return NULL;
60 }
61
62 static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
63 struct ieee80211_supported_band *sband,
64 u32 *rates)
65 {
66 int i, j, count;
67 *rates = 0;
68 count = 0;
69 for (i = 0; i < bss->supp_rates_len; i++) {
70 int rate = (bss->supp_rates[i] & 0x7F) * 5;
71
72 for (j = 0; j < sband->n_bitrates; j++)
73 if (sband->bitrates[j].bitrate == rate) {
74 *rates |= BIT(j);
75 count++;
76 break;
77 }
78 }
79
80 return count;
81 }
82
83 /* frame sending functions */
84
85 static void add_extra_ies(struct sk_buff *skb, u8 *ies, size_t ies_len)
86 {
87 if (ies)
88 memcpy(skb_put(skb, ies_len), ies, ies_len);
89 }
90
91 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
92 {
93 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
94 struct ieee80211_local *local = sdata->local;
95 struct sk_buff *skb;
96 struct ieee80211_mgmt *mgmt;
97 u8 *pos, *ies, *ht_ie, *e_ies;
98 int i, len, count, rates_len, supp_rates_len;
99 u16 capab;
100 struct ieee80211_bss *bss;
101 int wmm = 0;
102 struct ieee80211_supported_band *sband;
103 u32 rates = 0;
104 size_t e_ies_len;
105
106 if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) {
107 e_ies = sdata->u.mgd.ie_reassocreq;
108 e_ies_len = sdata->u.mgd.ie_reassocreq_len;
109 } else {
110 e_ies = sdata->u.mgd.ie_assocreq;
111 e_ies_len = sdata->u.mgd.ie_assocreq_len;
112 }
113
114 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
115 sizeof(*mgmt) + 200 + ifmgd->extra_ie_len +
116 ifmgd->ssid_len + e_ies_len);
117 if (!skb) {
118 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
119 "frame\n", sdata->dev->name);
120 return;
121 }
122 skb_reserve(skb, local->hw.extra_tx_headroom);
123
124 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
125
126 capab = ifmgd->capab;
127
128 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
129 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
130 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
131 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
132 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
133 }
134
135 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
136 local->hw.conf.channel->center_freq,
137 ifmgd->ssid, ifmgd->ssid_len);
138 if (bss) {
139 if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
140 capab |= WLAN_CAPABILITY_PRIVACY;
141 if (bss->wmm_used)
142 wmm = 1;
143
144 /* get all rates supported by the device and the AP as
145 * some APs don't like getting a superset of their rates
146 * in the association request (e.g. D-Link DAP 1353 in
147 * b-only mode) */
148 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
149
150 if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
151 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
152 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
153
154 ieee80211_rx_bss_put(local, bss);
155 } else {
156 rates = ~0;
157 rates_len = sband->n_bitrates;
158 }
159
160 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
161 memset(mgmt, 0, 24);
162 memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
163 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
164 memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
165
166 if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) {
167 skb_put(skb, 10);
168 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
169 IEEE80211_STYPE_REASSOC_REQ);
170 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
171 mgmt->u.reassoc_req.listen_interval =
172 cpu_to_le16(local->hw.conf.listen_interval);
173 memcpy(mgmt->u.reassoc_req.current_ap, ifmgd->prev_bssid,
174 ETH_ALEN);
175 } else {
176 skb_put(skb, 4);
177 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
178 IEEE80211_STYPE_ASSOC_REQ);
179 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
180 mgmt->u.assoc_req.listen_interval =
181 cpu_to_le16(local->hw.conf.listen_interval);
182 }
183
184 /* SSID */
185 ies = pos = skb_put(skb, 2 + ifmgd->ssid_len);
186 *pos++ = WLAN_EID_SSID;
187 *pos++ = ifmgd->ssid_len;
188 memcpy(pos, ifmgd->ssid, ifmgd->ssid_len);
189
190 /* add all rates which were marked to be used above */
191 supp_rates_len = rates_len;
192 if (supp_rates_len > 8)
193 supp_rates_len = 8;
194
195 len = sband->n_bitrates;
196 pos = skb_put(skb, supp_rates_len + 2);
197 *pos++ = WLAN_EID_SUPP_RATES;
198 *pos++ = supp_rates_len;
199
200 count = 0;
201 for (i = 0; i < sband->n_bitrates; i++) {
202 if (BIT(i) & rates) {
203 int rate = sband->bitrates[i].bitrate;
204 *pos++ = (u8) (rate / 5);
205 if (++count == 8)
206 break;
207 }
208 }
209
210 if (rates_len > count) {
211 pos = skb_put(skb, rates_len - count + 2);
212 *pos++ = WLAN_EID_EXT_SUPP_RATES;
213 *pos++ = rates_len - count;
214
215 for (i++; i < sband->n_bitrates; i++) {
216 if (BIT(i) & rates) {
217 int rate = sband->bitrates[i].bitrate;
218 *pos++ = (u8) (rate / 5);
219 }
220 }
221 }
222
223 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
224 /* 1. power capabilities */
225 pos = skb_put(skb, 4);
226 *pos++ = WLAN_EID_PWR_CAPABILITY;
227 *pos++ = 2;
228 *pos++ = 0; /* min tx power */
229 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
230
231 /* 2. supported channels */
232 /* TODO: get this in reg domain format */
233 pos = skb_put(skb, 2 * sband->n_channels + 2);
234 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
235 *pos++ = 2 * sband->n_channels;
236 for (i = 0; i < sband->n_channels; i++) {
237 *pos++ = ieee80211_frequency_to_channel(
238 sband->channels[i].center_freq);
239 *pos++ = 1; /* one channel in the subband*/
240 }
241 }
242
243 if (ifmgd->extra_ie) {
244 pos = skb_put(skb, ifmgd->extra_ie_len);
245 memcpy(pos, ifmgd->extra_ie, ifmgd->extra_ie_len);
246 }
247
248 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
249 pos = skb_put(skb, 9);
250 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
251 *pos++ = 7; /* len */
252 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
253 *pos++ = 0x50;
254 *pos++ = 0xf2;
255 *pos++ = 2; /* WME */
256 *pos++ = 0; /* WME info */
257 *pos++ = 1; /* WME ver */
258 *pos++ = 0;
259 }
260
261 /* wmm support is a must to HT */
262 /*
263 * IEEE802.11n does not allow TKIP/WEP as pairwise
264 * ciphers in HT mode. We still associate in non-ht
265 * mode (11a/b/g) if any one of these ciphers is
266 * configured as pairwise.
267 */
268 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
269 sband->ht_cap.ht_supported &&
270 (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) &&
271 ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
272 (!(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))) {
273 struct ieee80211_ht_info *ht_info =
274 (struct ieee80211_ht_info *)(ht_ie + 2);
275 u16 cap = sband->ht_cap.cap;
276 __le16 tmp;
277 u32 flags = local->hw.conf.channel->flags;
278
279 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
280 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
281 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
282 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
283 cap &= ~IEEE80211_HT_CAP_SGI_40;
284 }
285 break;
286 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
287 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
288 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
289 cap &= ~IEEE80211_HT_CAP_SGI_40;
290 }
291 break;
292 }
293
294 tmp = cpu_to_le16(cap);
295 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
296 *pos++ = WLAN_EID_HT_CAPABILITY;
297 *pos++ = sizeof(struct ieee80211_ht_cap);
298 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
299 memcpy(pos, &tmp, sizeof(u16));
300 pos += sizeof(u16);
301 /* TODO: needs a define here for << 2 */
302 *pos++ = sband->ht_cap.ampdu_factor |
303 (sband->ht_cap.ampdu_density << 2);
304 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
305 }
306
307 add_extra_ies(skb, e_ies, e_ies_len);
308
309 kfree(ifmgd->assocreq_ies);
310 ifmgd->assocreq_ies_len = (skb->data + skb->len) - ies;
311 ifmgd->assocreq_ies = kmalloc(ifmgd->assocreq_ies_len, GFP_KERNEL);
312 if (ifmgd->assocreq_ies)
313 memcpy(ifmgd->assocreq_ies, ies, ifmgd->assocreq_ies_len);
314
315 ieee80211_tx_skb(sdata, skb, 0);
316 }
317
318
319 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
320 u16 stype, u16 reason)
321 {
322 struct ieee80211_local *local = sdata->local;
323 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
324 struct sk_buff *skb;
325 struct ieee80211_mgmt *mgmt;
326 u8 *ies;
327 size_t ies_len;
328
329 if (stype == IEEE80211_STYPE_DEAUTH) {
330 ies = sdata->u.mgd.ie_deauth;
331 ies_len = sdata->u.mgd.ie_deauth_len;
332 } else {
333 ies = sdata->u.mgd.ie_disassoc;
334 ies_len = sdata->u.mgd.ie_disassoc_len;
335 }
336
337 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) +
338 ies_len);
339 if (!skb) {
340 printk(KERN_DEBUG "%s: failed to allocate buffer for "
341 "deauth/disassoc frame\n", sdata->dev->name);
342 return;
343 }
344 skb_reserve(skb, local->hw.extra_tx_headroom);
345
346 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
347 memset(mgmt, 0, 24);
348 memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
349 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
350 memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
351 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
352 skb_put(skb, 2);
353 /* u.deauth.reason_code == u.disassoc.reason_code */
354 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
355
356 add_extra_ies(skb, ies, ies_len);
357
358 ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
359 }
360
361 void ieee80211_send_pspoll(struct ieee80211_local *local,
362 struct ieee80211_sub_if_data *sdata)
363 {
364 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
365 struct ieee80211_pspoll *pspoll;
366 struct sk_buff *skb;
367 u16 fc;
368
369 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
370 if (!skb) {
371 printk(KERN_DEBUG "%s: failed to allocate buffer for "
372 "pspoll frame\n", sdata->dev->name);
373 return;
374 }
375 skb_reserve(skb, local->hw.extra_tx_headroom);
376
377 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
378 memset(pspoll, 0, sizeof(*pspoll));
379 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
380 pspoll->frame_control = cpu_to_le16(fc);
381 pspoll->aid = cpu_to_le16(ifmgd->aid);
382
383 /* aid in PS-Poll has its two MSBs each set to 1 */
384 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
385
386 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
387 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
388
389 ieee80211_tx_skb(sdata, skb, 0);
390 }
391
392 /* MLME */
393 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
394 struct ieee80211_if_managed *ifmgd,
395 u8 *wmm_param, size_t wmm_param_len)
396 {
397 struct ieee80211_tx_queue_params params;
398 size_t left;
399 int count;
400 u8 *pos;
401
402 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
403 return;
404
405 if (!wmm_param)
406 return;
407
408 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
409 return;
410 count = wmm_param[6] & 0x0f;
411 if (count == ifmgd->wmm_last_param_set)
412 return;
413 ifmgd->wmm_last_param_set = count;
414
415 pos = wmm_param + 8;
416 left = wmm_param_len - 8;
417
418 memset(&params, 0, sizeof(params));
419
420 local->wmm_acm = 0;
421 for (; left >= 4; left -= 4, pos += 4) {
422 int aci = (pos[0] >> 5) & 0x03;
423 int acm = (pos[0] >> 4) & 0x01;
424 int queue;
425
426 switch (aci) {
427 case 1: /* AC_BK */
428 queue = 3;
429 if (acm)
430 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
431 break;
432 case 2: /* AC_VI */
433 queue = 1;
434 if (acm)
435 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
436 break;
437 case 3: /* AC_VO */
438 queue = 0;
439 if (acm)
440 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
441 break;
442 case 0: /* AC_BE */
443 default:
444 queue = 2;
445 if (acm)
446 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
447 break;
448 }
449
450 params.aifs = pos[0] & 0x0f;
451 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
452 params.cw_min = ecw2cw(pos[1] & 0x0f);
453 params.txop = get_unaligned_le16(pos + 2);
454 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
455 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
456 "cWmin=%d cWmax=%d txop=%d\n",
457 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
458 params.cw_max, params.txop);
459 #endif
460 if (local->ops->conf_tx &&
461 local->ops->conf_tx(local_to_hw(local), queue, &params)) {
462 printk(KERN_DEBUG "%s: failed to set TX queue "
463 "parameters for queue %d\n", local->mdev->name, queue);
464 }
465 }
466 }
467
468 static bool ieee80211_check_tim(struct ieee802_11_elems *elems, u16 aid)
469 {
470 u8 mask;
471 u8 index, indexn1, indexn2;
472 struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *) elems->tim;
473
474 aid &= 0x3fff;
475 index = aid / 8;
476 mask = 1 << (aid & 7);
477
478 indexn1 = tim->bitmap_ctrl & 0xfe;
479 indexn2 = elems->tim_len + indexn1 - 4;
480
481 if (index < indexn1 || index > indexn2)
482 return false;
483
484 index -= indexn1;
485
486 return !!(tim->virtual_map[index] & mask);
487 }
488
489 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
490 u16 capab, bool erp_valid, u8 erp)
491 {
492 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
493 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
494 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
495 #endif
496 u32 changed = 0;
497 bool use_protection;
498 bool use_short_preamble;
499 bool use_short_slot;
500
501 if (erp_valid) {
502 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
503 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
504 } else {
505 use_protection = false;
506 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
507 }
508
509 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
510
511 if (use_protection != bss_conf->use_cts_prot) {
512 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
513 if (net_ratelimit()) {
514 printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
515 sdata->dev->name,
516 use_protection ? "enabled" : "disabled",
517 ifmgd->bssid);
518 }
519 #endif
520 bss_conf->use_cts_prot = use_protection;
521 changed |= BSS_CHANGED_ERP_CTS_PROT;
522 }
523
524 if (use_short_preamble != bss_conf->use_short_preamble) {
525 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
526 if (net_ratelimit()) {
527 printk(KERN_DEBUG "%s: switched to %s barker preamble"
528 " (BSSID=%pM)\n",
529 sdata->dev->name,
530 use_short_preamble ? "short" : "long",
531 ifmgd->bssid);
532 }
533 #endif
534 bss_conf->use_short_preamble = use_short_preamble;
535 changed |= BSS_CHANGED_ERP_PREAMBLE;
536 }
537
538 if (use_short_slot != bss_conf->use_short_slot) {
539 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
540 if (net_ratelimit()) {
541 printk(KERN_DEBUG "%s: switched to %s slot time"
542 " (BSSID=%pM)\n",
543 sdata->dev->name,
544 use_short_slot ? "short" : "long",
545 ifmgd->bssid);
546 }
547 #endif
548 bss_conf->use_short_slot = use_short_slot;
549 changed |= BSS_CHANGED_ERP_SLOT;
550 }
551
552 return changed;
553 }
554
555 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata)
556 {
557 union iwreq_data wrqu;
558
559 memset(&wrqu, 0, sizeof(wrqu));
560 if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED)
561 memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN);
562 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
563 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
564 }
565
566 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata)
567 {
568 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
569 char *buf;
570 size_t len;
571 int i;
572 union iwreq_data wrqu;
573
574 if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies)
575 return;
576
577 buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len +
578 ifmgd->assocresp_ies_len), GFP_KERNEL);
579 if (!buf)
580 return;
581
582 len = sprintf(buf, "ASSOCINFO(");
583 if (ifmgd->assocreq_ies) {
584 len += sprintf(buf + len, "ReqIEs=");
585 for (i = 0; i < ifmgd->assocreq_ies_len; i++) {
586 len += sprintf(buf + len, "%02x",
587 ifmgd->assocreq_ies[i]);
588 }
589 }
590 if (ifmgd->assocresp_ies) {
591 if (ifmgd->assocreq_ies)
592 len += sprintf(buf + len, " ");
593 len += sprintf(buf + len, "RespIEs=");
594 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
595 len += sprintf(buf + len, "%02x",
596 ifmgd->assocresp_ies[i]);
597 }
598 }
599 len += sprintf(buf + len, ")");
600
601 if (len > IW_CUSTOM_MAX) {
602 len = sprintf(buf, "ASSOCRESPIE=");
603 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
604 len += sprintf(buf + len, "%02x",
605 ifmgd->assocresp_ies[i]);
606 }
607 }
608
609 if (len <= IW_CUSTOM_MAX) {
610 memset(&wrqu, 0, sizeof(wrqu));
611 wrqu.data.length = len;
612 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
613 }
614
615 kfree(buf);
616 }
617
618
619 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
620 u32 bss_info_changed)
621 {
622 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
623 struct ieee80211_local *local = sdata->local;
624 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
625
626 struct ieee80211_bss *bss;
627
628 bss_info_changed |= BSS_CHANGED_ASSOC;
629 ifmgd->flags |= IEEE80211_STA_ASSOCIATED;
630
631 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
632 conf->channel->center_freq,
633 ifmgd->ssid, ifmgd->ssid_len);
634 if (bss) {
635 /* set timing information */
636 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
637 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
638 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
639
640 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
641 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
642
643 ieee80211_rx_bss_put(local, bss);
644 }
645
646 ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET;
647 memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN);
648 ieee80211_sta_send_associnfo(sdata);
649
650 ifmgd->last_probe = jiffies;
651 ieee80211_led_assoc(local, 1);
652
653 sdata->vif.bss_conf.assoc = 1;
654 /*
655 * For now just always ask the driver to update the basic rateset
656 * when we have associated, we aren't checking whether it actually
657 * changed or not.
658 */
659 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
660 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
661
662 if (local->powersave) {
663 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) &&
664 local->hw.conf.dynamic_ps_timeout > 0) {
665 mod_timer(&local->dynamic_ps_timer, jiffies +
666 msecs_to_jiffies(
667 local->hw.conf.dynamic_ps_timeout));
668 } else {
669 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
670 ieee80211_send_nullfunc(local, sdata, 1);
671 conf->flags |= IEEE80211_CONF_PS;
672 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
673 }
674 }
675
676 netif_tx_start_all_queues(sdata->dev);
677 netif_carrier_on(sdata->dev);
678
679 ieee80211_sta_send_apinfo(sdata);
680 }
681
682 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata)
683 {
684 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
685 struct ieee80211_local *local = sdata->local;
686
687 ifmgd->direct_probe_tries++;
688 if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
689 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
690 sdata->dev->name, ifmgd->bssid);
691 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
692 ieee80211_sta_send_apinfo(sdata);
693
694 /*
695 * Most likely AP is not in the range so remove the
696 * bss information associated to the AP
697 */
698 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
699 sdata->local->hw.conf.channel->center_freq,
700 ifmgd->ssid, ifmgd->ssid_len);
701
702 /*
703 * We might have a pending scan which had no chance to run yet
704 * due to state == IEEE80211_STA_MLME_DIRECT_PROBE.
705 * Hence, queue the STAs work again
706 */
707 queue_work(local->hw.workqueue, &ifmgd->work);
708 return;
709 }
710
711 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
712 sdata->dev->name, ifmgd->bssid,
713 ifmgd->direct_probe_tries);
714
715 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
716
717 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifmgd->request);
718
719 /* Direct probe is sent to broadcast address as some APs
720 * will not answer to direct packet in unassociated state.
721 */
722 ieee80211_send_probe_req(sdata, NULL,
723 ifmgd->ssid, ifmgd->ssid_len, NULL, 0);
724
725 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
726 }
727
728
729 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata)
730 {
731 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
732 struct ieee80211_local *local = sdata->local;
733 u8 *ies;
734 size_t ies_len;
735
736 ifmgd->auth_tries++;
737 if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
738 printk(KERN_DEBUG "%s: authentication with AP %pM"
739 " timed out\n",
740 sdata->dev->name, ifmgd->bssid);
741 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
742 ieee80211_sta_send_apinfo(sdata);
743 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
744 sdata->local->hw.conf.channel->center_freq,
745 ifmgd->ssid, ifmgd->ssid_len);
746
747 /*
748 * We might have a pending scan which had no chance to run yet
749 * due to state == IEEE80211_STA_MLME_AUTHENTICATE.
750 * Hence, queue the STAs work again
751 */
752 queue_work(local->hw.workqueue, &ifmgd->work);
753 return;
754 }
755
756 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
757 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
758 sdata->dev->name, ifmgd->bssid);
759
760 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
761 ies = ifmgd->sme_auth_ie;
762 ies_len = ifmgd->sme_auth_ie_len;
763 } else {
764 ies = NULL;
765 ies_len = 0;
766 }
767 ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ies, ies_len,
768 ifmgd->bssid, 0);
769 ifmgd->auth_transaction = 2;
770
771 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
772 }
773
774 /*
775 * The disassoc 'reason' argument can be either our own reason
776 * if self disconnected or a reason code from the AP.
777 */
778 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
779 bool deauth, bool self_disconnected,
780 u16 reason)
781 {
782 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
783 struct ieee80211_local *local = sdata->local;
784 struct sta_info *sta;
785 u32 changed = 0, config_changed = 0;
786
787 rcu_read_lock();
788
789 sta = sta_info_get(local, ifmgd->bssid);
790 if (!sta) {
791 rcu_read_unlock();
792 return;
793 }
794
795 if (deauth) {
796 ifmgd->direct_probe_tries = 0;
797 ifmgd->auth_tries = 0;
798 }
799 ifmgd->assoc_scan_tries = 0;
800 ifmgd->assoc_tries = 0;
801
802 netif_tx_stop_all_queues(sdata->dev);
803 netif_carrier_off(sdata->dev);
804
805 ieee80211_sta_tear_down_BA_sessions(sta);
806
807 if (self_disconnected) {
808 if (deauth)
809 ieee80211_send_deauth_disassoc(sdata,
810 IEEE80211_STYPE_DEAUTH, reason);
811 else
812 ieee80211_send_deauth_disassoc(sdata,
813 IEEE80211_STYPE_DISASSOC, reason);
814 }
815
816 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
817 changed |= ieee80211_reset_erp_info(sdata);
818
819 ieee80211_led_assoc(local, 0);
820 changed |= BSS_CHANGED_ASSOC;
821 sdata->vif.bss_conf.assoc = false;
822
823 ieee80211_sta_send_apinfo(sdata);
824
825 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
826 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
827 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
828 sdata->local->hw.conf.channel->center_freq,
829 ifmgd->ssid, ifmgd->ssid_len);
830 }
831
832 rcu_read_unlock();
833
834 /* channel(_type) changes are handled by ieee80211_hw_config */
835 local->oper_channel_type = NL80211_CHAN_NO_HT;
836
837 local->power_constr_level = 0;
838
839 del_timer_sync(&local->dynamic_ps_timer);
840 cancel_work_sync(&local->dynamic_ps_enable_work);
841
842 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
843 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
844 config_changed |= IEEE80211_CONF_CHANGE_PS;
845 }
846
847 ieee80211_hw_config(local, config_changed);
848 ieee80211_bss_info_change_notify(sdata, changed);
849
850 rcu_read_lock();
851
852 sta = sta_info_get(local, ifmgd->bssid);
853 if (!sta) {
854 rcu_read_unlock();
855 return;
856 }
857
858 sta_info_unlink(&sta);
859
860 rcu_read_unlock();
861
862 sta_info_destroy(sta);
863 }
864
865 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
866 {
867 if (!sdata || !sdata->default_key ||
868 sdata->default_key->conf.alg != ALG_WEP)
869 return 0;
870 return 1;
871 }
872
873 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata)
874 {
875 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
876 struct ieee80211_local *local = sdata->local;
877 struct ieee80211_bss *bss;
878 int bss_privacy;
879 int wep_privacy;
880 int privacy_invoked;
881
882 if (!ifmgd || (ifmgd->flags & (IEEE80211_STA_MIXED_CELL |
883 IEEE80211_STA_EXT_SME)))
884 return 0;
885
886 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
887 local->hw.conf.channel->center_freq,
888 ifmgd->ssid, ifmgd->ssid_len);
889 if (!bss)
890 return 0;
891
892 bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY);
893 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
894 privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED);
895
896 ieee80211_rx_bss_put(local, bss);
897
898 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
899 return 0;
900
901 return 1;
902 }
903
904 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata)
905 {
906 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
907 struct ieee80211_local *local = sdata->local;
908
909 ifmgd->assoc_tries++;
910 if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
911 printk(KERN_DEBUG "%s: association with AP %pM"
912 " timed out\n",
913 sdata->dev->name, ifmgd->bssid);
914 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
915 ieee80211_sta_send_apinfo(sdata);
916 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
917 sdata->local->hw.conf.channel->center_freq,
918 ifmgd->ssid, ifmgd->ssid_len);
919 /*
920 * We might have a pending scan which had no chance to run yet
921 * due to state == IEEE80211_STA_MLME_ASSOCIATE.
922 * Hence, queue the STAs work again
923 */
924 queue_work(local->hw.workqueue, &ifmgd->work);
925 return;
926 }
927
928 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
929 printk(KERN_DEBUG "%s: associate with AP %pM\n",
930 sdata->dev->name, ifmgd->bssid);
931 if (ieee80211_privacy_mismatch(sdata)) {
932 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
933 "mixed-cell disabled - abort association\n", sdata->dev->name);
934 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
935 return;
936 }
937
938 ieee80211_send_assoc(sdata);
939
940 mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
941 }
942
943
944 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
945 {
946 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
947 struct ieee80211_local *local = sdata->local;
948 struct sta_info *sta;
949 int disassoc;
950
951 /* TODO: start monitoring current AP signal quality and number of
952 * missed beacons. Scan other channels every now and then and search
953 * for better APs. */
954 /* TODO: remove expired BSSes */
955
956 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED;
957
958 rcu_read_lock();
959
960 sta = sta_info_get(local, ifmgd->bssid);
961 if (!sta) {
962 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
963 sdata->dev->name, ifmgd->bssid);
964 disassoc = 1;
965 } else {
966 disassoc = 0;
967 if (time_after(jiffies,
968 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
969 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) {
970 printk(KERN_DEBUG "%s: No ProbeResp from "
971 "current AP %pM - assume out of "
972 "range\n",
973 sdata->dev->name, ifmgd->bssid);
974 disassoc = 1;
975 } else
976 ieee80211_send_probe_req(sdata, ifmgd->bssid,
977 ifmgd->ssid,
978 ifmgd->ssid_len,
979 NULL, 0);
980 ifmgd->flags ^= IEEE80211_STA_PROBEREQ_POLL;
981 } else {
982 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
983 if (time_after(jiffies, ifmgd->last_probe +
984 IEEE80211_PROBE_INTERVAL)) {
985 ifmgd->last_probe = jiffies;
986 ieee80211_send_probe_req(sdata, ifmgd->bssid,
987 ifmgd->ssid,
988 ifmgd->ssid_len,
989 NULL, 0);
990 }
991 }
992 }
993
994 rcu_read_unlock();
995
996 if (disassoc)
997 ieee80211_set_disassoc(sdata, true, true,
998 WLAN_REASON_PREV_AUTH_NOT_VALID);
999 else
1000 mod_timer(&ifmgd->timer, jiffies +
1001 IEEE80211_MONITORING_INTERVAL);
1002 }
1003
1004
1005 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata)
1006 {
1007 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1008
1009 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1010 ifmgd->flags |= IEEE80211_STA_AUTHENTICATED;
1011 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1012 /* Wait for SME to request association */
1013 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1014 } else
1015 ieee80211_associate(sdata);
1016 }
1017
1018
1019 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1020 struct ieee80211_mgmt *mgmt,
1021 size_t len)
1022 {
1023 u8 *pos;
1024 struct ieee802_11_elems elems;
1025
1026 pos = mgmt->u.auth.variable;
1027 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1028 if (!elems.challenge)
1029 return;
1030 ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg,
1031 elems.challenge - 2, elems.challenge_len + 2,
1032 sdata->u.mgd.bssid, 1);
1033 sdata->u.mgd.auth_transaction = 4;
1034 }
1035
1036 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1037 struct ieee80211_mgmt *mgmt,
1038 size_t len)
1039 {
1040 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1041 u16 auth_alg, auth_transaction, status_code;
1042
1043 if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE)
1044 return;
1045
1046 if (len < 24 + 6)
1047 return;
1048
1049 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1050 return;
1051
1052 if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1053 return;
1054
1055 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1056 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1057 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1058
1059 if (auth_alg != ifmgd->auth_alg ||
1060 auth_transaction != ifmgd->auth_transaction)
1061 return;
1062
1063 if (status_code != WLAN_STATUS_SUCCESS) {
1064 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1065 u8 algs[3];
1066 const int num_algs = ARRAY_SIZE(algs);
1067 int i, pos;
1068 algs[0] = algs[1] = algs[2] = 0xff;
1069 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1070 algs[0] = WLAN_AUTH_OPEN;
1071 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1072 algs[1] = WLAN_AUTH_SHARED_KEY;
1073 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1074 algs[2] = WLAN_AUTH_LEAP;
1075 if (ifmgd->auth_alg == WLAN_AUTH_OPEN)
1076 pos = 0;
1077 else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY)
1078 pos = 1;
1079 else
1080 pos = 2;
1081 for (i = 0; i < num_algs; i++) {
1082 pos++;
1083 if (pos >= num_algs)
1084 pos = 0;
1085 if (algs[pos] == ifmgd->auth_alg ||
1086 algs[pos] == 0xff)
1087 continue;
1088 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1089 !ieee80211_sta_wep_configured(sdata))
1090 continue;
1091 ifmgd->auth_alg = algs[pos];
1092 break;
1093 }
1094 }
1095 return;
1096 }
1097
1098 switch (ifmgd->auth_alg) {
1099 case WLAN_AUTH_OPEN:
1100 case WLAN_AUTH_LEAP:
1101 case WLAN_AUTH_FT:
1102 ieee80211_auth_completed(sdata);
1103 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1104 break;
1105 case WLAN_AUTH_SHARED_KEY:
1106 if (ifmgd->auth_transaction == 4) {
1107 ieee80211_auth_completed(sdata);
1108 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1109 } else
1110 ieee80211_auth_challenge(sdata, mgmt, len);
1111 break;
1112 }
1113 }
1114
1115
1116 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1117 struct ieee80211_mgmt *mgmt,
1118 size_t len)
1119 {
1120 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1121 u16 reason_code;
1122
1123 if (len < 24 + 2)
1124 return;
1125
1126 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1127 return;
1128
1129 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1130
1131 if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED)
1132 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1133 sdata->dev->name, reason_code);
1134
1135 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1136 (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1137 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE ||
1138 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) {
1139 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1140 mod_timer(&ifmgd->timer, jiffies +
1141 IEEE80211_RETRY_AUTH_INTERVAL);
1142 }
1143
1144 ieee80211_set_disassoc(sdata, true, false, 0);
1145 ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED;
1146 cfg80211_send_rx_deauth(sdata->dev, (u8 *) mgmt, len);
1147 }
1148
1149
1150 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1151 struct ieee80211_mgmt *mgmt,
1152 size_t len)
1153 {
1154 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1155 u16 reason_code;
1156
1157 if (len < 24 + 2)
1158 return;
1159
1160 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1161 return;
1162
1163 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1164
1165 if (ifmgd->flags & IEEE80211_STA_ASSOCIATED)
1166 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1167 sdata->dev->name, reason_code);
1168
1169 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1170 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1171 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1172 mod_timer(&ifmgd->timer, jiffies +
1173 IEEE80211_RETRY_AUTH_INTERVAL);
1174 }
1175
1176 ieee80211_set_disassoc(sdata, false, false, reason_code);
1177 cfg80211_send_rx_disassoc(sdata->dev, (u8 *) mgmt, len);
1178 }
1179
1180
1181 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1182 struct ieee80211_mgmt *mgmt,
1183 size_t len,
1184 int reassoc)
1185 {
1186 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1187 struct ieee80211_local *local = sdata->local;
1188 struct ieee80211_supported_band *sband;
1189 struct sta_info *sta;
1190 u32 rates, basic_rates;
1191 u16 capab_info, status_code, aid;
1192 struct ieee802_11_elems elems;
1193 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1194 u8 *pos;
1195 u32 changed = 0;
1196 int i, j;
1197 bool have_higher_than_11mbit = false, newsta = false;
1198 u16 ap_ht_cap_flags;
1199
1200 /* AssocResp and ReassocResp have identical structure, so process both
1201 * of them in this function. */
1202
1203 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1204 return;
1205
1206 if (len < 24 + 6)
1207 return;
1208
1209 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1210 return;
1211
1212 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1213 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1214 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1215
1216 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1217 "status=%d aid=%d)\n",
1218 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1219 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1220
1221 pos = mgmt->u.assoc_resp.variable;
1222 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1223
1224 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1225 elems.timeout_int && elems.timeout_int_len == 5 &&
1226 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1227 u32 tu, ms;
1228 tu = get_unaligned_le32(elems.timeout_int + 1);
1229 ms = tu * 1024 / 1000;
1230 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1231 "comeback duration %u TU (%u ms)\n",
1232 sdata->dev->name, tu, ms);
1233 if (ms > IEEE80211_ASSOC_TIMEOUT)
1234 mod_timer(&ifmgd->timer,
1235 jiffies + msecs_to_jiffies(ms));
1236 return;
1237 }
1238
1239 if (status_code != WLAN_STATUS_SUCCESS) {
1240 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1241 sdata->dev->name, status_code);
1242 /* if this was a reassociation, ensure we try a "full"
1243 * association next time. This works around some broken APs
1244 * which do not correctly reject reassociation requests. */
1245 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1246 return;
1247 }
1248
1249 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1250 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1251 "set\n", sdata->dev->name, aid);
1252 aid &= ~(BIT(15) | BIT(14));
1253
1254 if (!elems.supp_rates) {
1255 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1256 sdata->dev->name);
1257 return;
1258 }
1259
1260 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1261 ifmgd->aid = aid;
1262 ifmgd->ap_capab = capab_info;
1263
1264 kfree(ifmgd->assocresp_ies);
1265 ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1266 ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL);
1267 if (ifmgd->assocresp_ies)
1268 memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len);
1269
1270 rcu_read_lock();
1271
1272 /* Add STA entry for the AP */
1273 sta = sta_info_get(local, ifmgd->bssid);
1274 if (!sta) {
1275 newsta = true;
1276
1277 sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC);
1278 if (!sta) {
1279 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1280 " the AP\n", sdata->dev->name);
1281 rcu_read_unlock();
1282 return;
1283 }
1284
1285 /* update new sta with its last rx activity */
1286 sta->last_rx = jiffies;
1287 }
1288
1289 /*
1290 * FIXME: Do we really need to update the sta_info's information here?
1291 * We already know about the AP (we found it in our list) so it
1292 * should already be filled with the right info, no?
1293 * As is stands, all this is racy because typically we assume
1294 * the information that is filled in here (except flags) doesn't
1295 * change while a STA structure is alive. As such, it should move
1296 * to between the sta_info_alloc() and sta_info_insert() above.
1297 */
1298
1299 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1300 WLAN_STA_AUTHORIZED);
1301
1302 rates = 0;
1303 basic_rates = 0;
1304 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1305
1306 for (i = 0; i < elems.supp_rates_len; i++) {
1307 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1308 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1309
1310 if (rate > 110)
1311 have_higher_than_11mbit = true;
1312
1313 for (j = 0; j < sband->n_bitrates; j++) {
1314 if (sband->bitrates[j].bitrate == rate) {
1315 rates |= BIT(j);
1316 if (is_basic)
1317 basic_rates |= BIT(j);
1318 break;
1319 }
1320 }
1321 }
1322
1323 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1324 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1325 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1326
1327 if (rate > 110)
1328 have_higher_than_11mbit = true;
1329
1330 for (j = 0; j < sband->n_bitrates; j++) {
1331 if (sband->bitrates[j].bitrate == rate) {
1332 rates |= BIT(j);
1333 if (is_basic)
1334 basic_rates |= BIT(j);
1335 break;
1336 }
1337 }
1338 }
1339
1340 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1341 sdata->vif.bss_conf.basic_rates = basic_rates;
1342
1343 /* cf. IEEE 802.11 9.2.12 */
1344 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1345 have_higher_than_11mbit)
1346 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1347 else
1348 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1349
1350 /* If TKIP/WEP is used, no need to parse AP's HT capabilities */
1351 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1352 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1353 elems.ht_cap_elem, &sta->sta.ht_cap);
1354
1355 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1356
1357 rate_control_rate_init(sta);
1358
1359 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1360 set_sta_flags(sta, WLAN_STA_MFP);
1361
1362 if (elems.wmm_param)
1363 set_sta_flags(sta, WLAN_STA_WME);
1364
1365 if (newsta) {
1366 int err = sta_info_insert(sta);
1367 if (err) {
1368 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1369 " the AP (error %d)\n", sdata->dev->name, err);
1370 rcu_read_unlock();
1371 return;
1372 }
1373 }
1374
1375 rcu_read_unlock();
1376
1377 if (elems.wmm_param)
1378 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1379 elems.wmm_param_len);
1380
1381 if (elems.ht_info_elem && elems.wmm_param &&
1382 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1383 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1384 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1385 ap_ht_cap_flags);
1386
1387 /* set AID and assoc capability,
1388 * ieee80211_set_associated() will tell the driver */
1389 bss_conf->aid = aid;
1390 bss_conf->assoc_capability = capab_info;
1391 ieee80211_set_associated(sdata, changed);
1392
1393 ieee80211_associated(sdata);
1394 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1395 }
1396
1397
1398 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1399 struct ieee80211_mgmt *mgmt,
1400 size_t len,
1401 struct ieee80211_rx_status *rx_status,
1402 struct ieee802_11_elems *elems,
1403 bool beacon)
1404 {
1405 struct ieee80211_local *local = sdata->local;
1406 int freq;
1407 struct ieee80211_bss *bss;
1408 struct ieee80211_channel *channel;
1409
1410 if (elems->ds_params && elems->ds_params_len == 1)
1411 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1412 else
1413 freq = rx_status->freq;
1414
1415 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1416
1417 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1418 return;
1419
1420 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1421 channel, beacon);
1422 if (!bss)
1423 return;
1424
1425 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1426 (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) {
1427 struct ieee80211_channel_sw_ie *sw_elem =
1428 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1429 ieee80211_process_chanswitch(sdata, sw_elem, bss);
1430 }
1431
1432 ieee80211_rx_bss_put(local, bss);
1433 }
1434
1435
1436 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1437 struct ieee80211_mgmt *mgmt,
1438 size_t len,
1439 struct ieee80211_rx_status *rx_status)
1440 {
1441 size_t baselen;
1442 struct ieee802_11_elems elems;
1443
1444 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1445 return; /* ignore ProbeResp to foreign address */
1446
1447 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1448 if (baselen > len)
1449 return;
1450
1451 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1452 &elems);
1453
1454 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1455
1456 /* direct probe may be part of the association flow */
1457 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1458 &sdata->u.mgd.request)) {
1459 printk(KERN_DEBUG "%s direct probe responded\n",
1460 sdata->dev->name);
1461 ieee80211_authenticate(sdata);
1462 }
1463 }
1464
1465 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1466 struct ieee80211_mgmt *mgmt,
1467 size_t len,
1468 struct ieee80211_rx_status *rx_status)
1469 {
1470 struct ieee80211_if_managed *ifmgd;
1471 size_t baselen;
1472 struct ieee802_11_elems elems;
1473 struct ieee80211_local *local = sdata->local;
1474 u32 changed = 0;
1475 bool erp_valid, directed_tim;
1476 u8 erp_value = 0;
1477
1478 /* Process beacon from the current BSS */
1479 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1480 if (baselen > len)
1481 return;
1482
1483 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1484
1485 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
1486
1487 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1488 return;
1489
1490 ifmgd = &sdata->u.mgd;
1491
1492 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) ||
1493 memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1494 return;
1495
1496 if (rx_status->freq != local->hw.conf.channel->center_freq)
1497 return;
1498
1499 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1500 elems.wmm_param_len);
1501
1502 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1503 directed_tim = ieee80211_check_tim(&elems, ifmgd->aid);
1504
1505 if (directed_tim) {
1506 if (local->hw.conf.dynamic_ps_timeout > 0) {
1507 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1508 ieee80211_hw_config(local,
1509 IEEE80211_CONF_CHANGE_PS);
1510 ieee80211_send_nullfunc(local, sdata, 0);
1511 } else {
1512 local->pspolling = true;
1513
1514 /*
1515 * Here is assumed that the driver will be
1516 * able to send ps-poll frame and receive a
1517 * response even though power save mode is
1518 * enabled, but some drivers might require
1519 * to disable power save here. This needs
1520 * to be investigated.
1521 */
1522 ieee80211_send_pspoll(local, sdata);
1523 }
1524 }
1525 }
1526
1527 if (elems.erp_info && elems.erp_info_len >= 1) {
1528 erp_valid = true;
1529 erp_value = elems.erp_info[0];
1530 } else {
1531 erp_valid = false;
1532 }
1533 changed |= ieee80211_handle_bss_capability(sdata,
1534 le16_to_cpu(mgmt->u.beacon.capab_info),
1535 erp_valid, erp_value);
1536
1537
1538 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1539 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) {
1540 struct sta_info *sta;
1541 struct ieee80211_supported_band *sband;
1542 u16 ap_ht_cap_flags;
1543
1544 rcu_read_lock();
1545
1546 sta = sta_info_get(local, ifmgd->bssid);
1547 if (!sta) {
1548 rcu_read_unlock();
1549 return;
1550 }
1551
1552 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1553
1554 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1555 elems.ht_cap_elem, &sta->sta.ht_cap);
1556
1557 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1558
1559 rcu_read_unlock();
1560
1561 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1562 ap_ht_cap_flags);
1563 }
1564
1565 if (elems.country_elem) {
1566 /* Note we are only reviewing this on beacons
1567 * for the BSSID we are associated to */
1568 regulatory_hint_11d(local->hw.wiphy,
1569 elems.country_elem, elems.country_elem_len);
1570
1571 /* TODO: IBSS also needs this */
1572 if (elems.pwr_constr_elem)
1573 ieee80211_handle_pwr_constr(sdata,
1574 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1575 elems.pwr_constr_elem,
1576 elems.pwr_constr_elem_len);
1577 }
1578
1579 ieee80211_bss_info_change_notify(sdata, changed);
1580 }
1581
1582 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1583 struct sk_buff *skb,
1584 struct ieee80211_rx_status *rx_status)
1585 {
1586 struct ieee80211_local *local = sdata->local;
1587 struct ieee80211_mgmt *mgmt;
1588 u16 fc;
1589
1590 if (skb->len < 24)
1591 return RX_DROP_MONITOR;
1592
1593 mgmt = (struct ieee80211_mgmt *) skb->data;
1594 fc = le16_to_cpu(mgmt->frame_control);
1595
1596 switch (fc & IEEE80211_FCTL_STYPE) {
1597 case IEEE80211_STYPE_PROBE_REQ:
1598 case IEEE80211_STYPE_PROBE_RESP:
1599 case IEEE80211_STYPE_BEACON:
1600 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1601 case IEEE80211_STYPE_AUTH:
1602 case IEEE80211_STYPE_ASSOC_RESP:
1603 case IEEE80211_STYPE_REASSOC_RESP:
1604 case IEEE80211_STYPE_DEAUTH:
1605 case IEEE80211_STYPE_DISASSOC:
1606 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1607 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
1608 return RX_QUEUED;
1609 }
1610
1611 return RX_DROP_MONITOR;
1612 }
1613
1614 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1615 struct sk_buff *skb)
1616 {
1617 struct ieee80211_rx_status *rx_status;
1618 struct ieee80211_mgmt *mgmt;
1619 u16 fc;
1620
1621 rx_status = (struct ieee80211_rx_status *) skb->cb;
1622 mgmt = (struct ieee80211_mgmt *) skb->data;
1623 fc = le16_to_cpu(mgmt->frame_control);
1624
1625 switch (fc & IEEE80211_FCTL_STYPE) {
1626 case IEEE80211_STYPE_PROBE_RESP:
1627 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
1628 rx_status);
1629 break;
1630 case IEEE80211_STYPE_BEACON:
1631 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1632 rx_status);
1633 break;
1634 case IEEE80211_STYPE_AUTH:
1635 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
1636 break;
1637 case IEEE80211_STYPE_ASSOC_RESP:
1638 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0);
1639 break;
1640 case IEEE80211_STYPE_REASSOC_RESP:
1641 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1);
1642 break;
1643 case IEEE80211_STYPE_DEAUTH:
1644 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1645 break;
1646 case IEEE80211_STYPE_DISASSOC:
1647 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1648 break;
1649 }
1650
1651 kfree_skb(skb);
1652 }
1653
1654 static void ieee80211_sta_timer(unsigned long data)
1655 {
1656 struct ieee80211_sub_if_data *sdata =
1657 (struct ieee80211_sub_if_data *) data;
1658 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1659 struct ieee80211_local *local = sdata->local;
1660
1661 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1662 queue_work(local->hw.workqueue, &ifmgd->work);
1663 }
1664
1665 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata)
1666 {
1667 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1668 struct ieee80211_local *local = sdata->local;
1669
1670 if (local->ops->reset_tsf) {
1671 /* Reset own TSF to allow time synchronization work. */
1672 local->ops->reset_tsf(local_to_hw(local));
1673 }
1674
1675 ifmgd->wmm_last_param_set = -1; /* allow any WMM update */
1676
1677
1678 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1679 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1680 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1681 ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY;
1682 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1683 ifmgd->auth_alg = WLAN_AUTH_LEAP;
1684 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_FT)
1685 ifmgd->auth_alg = WLAN_AUTH_FT;
1686 else
1687 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1688 ifmgd->auth_transaction = -1;
1689 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
1690 ifmgd->assoc_scan_tries = 0;
1691 ifmgd->direct_probe_tries = 0;
1692 ifmgd->auth_tries = 0;
1693 ifmgd->assoc_tries = 0;
1694 netif_tx_stop_all_queues(sdata->dev);
1695 netif_carrier_off(sdata->dev);
1696 }
1697
1698 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata)
1699 {
1700 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1701 struct ieee80211_local *local = sdata->local;
1702 struct ieee80211_bss *bss;
1703 u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid;
1704 u8 ssid_len = ifmgd->ssid_len;
1705 u16 capa_mask = WLAN_CAPABILITY_ESS;
1706 u16 capa_val = WLAN_CAPABILITY_ESS;
1707 struct ieee80211_channel *chan = local->oper_channel;
1708
1709 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1710 ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL |
1711 IEEE80211_STA_AUTO_BSSID_SEL |
1712 IEEE80211_STA_AUTO_CHANNEL_SEL)) {
1713 capa_mask |= WLAN_CAPABILITY_PRIVACY;
1714 if (sdata->default_key)
1715 capa_val |= WLAN_CAPABILITY_PRIVACY;
1716 }
1717
1718 if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
1719 chan = NULL;
1720
1721 if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL)
1722 bssid = NULL;
1723
1724 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) {
1725 ssid = NULL;
1726 ssid_len = 0;
1727 }
1728
1729 bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
1730 bssid, ssid, ssid_len,
1731 capa_mask, capa_val);
1732
1733 if (bss) {
1734 ieee80211_set_freq(sdata, bss->cbss.channel->center_freq);
1735 if (!(ifmgd->flags & IEEE80211_STA_SSID_SET))
1736 ieee80211_sta_set_ssid(sdata, bss->ssid,
1737 bss->ssid_len);
1738 ieee80211_sta_set_bssid(sdata, bss->cbss.bssid);
1739 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
1740 bss->supp_rates);
1741 if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED)
1742 sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED;
1743 else
1744 sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED;
1745
1746 /* Send out direct probe if no probe resp was received or
1747 * the one we have is outdated
1748 */
1749 if (!bss->last_probe_resp ||
1750 time_after(jiffies, bss->last_probe_resp
1751 + IEEE80211_SCAN_RESULT_EXPIRE))
1752 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1753 else
1754 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
1755
1756 ieee80211_rx_bss_put(local, bss);
1757 ieee80211_sta_reset_auth(sdata);
1758 return 0;
1759 } else {
1760 if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
1761 ifmgd->assoc_scan_tries++;
1762 /* XXX maybe racy? */
1763 if (local->scan_req)
1764 return -1;
1765 memcpy(local->int_scan_req.ssids[0].ssid,
1766 ifmgd->ssid, IEEE80211_MAX_SSID_LEN);
1767 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL)
1768 local->int_scan_req.ssids[0].ssid_len = 0;
1769 else
1770 local->int_scan_req.ssids[0].ssid_len = ifmgd->ssid_len;
1771
1772 if (ieee80211_start_scan(sdata, &local->int_scan_req))
1773 ieee80211_scan_failed(local);
1774
1775 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
1776 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
1777 } else {
1778 ifmgd->assoc_scan_tries = 0;
1779 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1780 }
1781 }
1782 return -1;
1783 }
1784
1785
1786 static void ieee80211_sta_work(struct work_struct *work)
1787 {
1788 struct ieee80211_sub_if_data *sdata =
1789 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
1790 struct ieee80211_local *local = sdata->local;
1791 struct ieee80211_if_managed *ifmgd;
1792 struct sk_buff *skb;
1793
1794 if (!netif_running(sdata->dev))
1795 return;
1796
1797 if (local->sw_scanning || local->hw_scanning)
1798 return;
1799
1800 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1801 return;
1802 ifmgd = &sdata->u.mgd;
1803
1804 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
1805 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1806
1807 if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
1808 ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE &&
1809 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE &&
1810 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) {
1811 /*
1812 * The call to ieee80211_start_scan can fail but ieee80211_request_scan
1813 * (which queued ieee80211_sta_work) did not return an error. Thus, call
1814 * ieee80211_scan_failed here if ieee80211_start_scan fails in order to
1815 * notify the scan requester.
1816 */
1817 if (ieee80211_start_scan(sdata, local->scan_req))
1818 ieee80211_scan_failed(local);
1819 return;
1820 }
1821
1822 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) {
1823 if (ieee80211_sta_config_auth(sdata))
1824 return;
1825 clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1826 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request))
1827 return;
1828
1829 switch (ifmgd->state) {
1830 case IEEE80211_STA_MLME_DISABLED:
1831 break;
1832 case IEEE80211_STA_MLME_DIRECT_PROBE:
1833 ieee80211_direct_probe(sdata);
1834 break;
1835 case IEEE80211_STA_MLME_AUTHENTICATE:
1836 ieee80211_authenticate(sdata);
1837 break;
1838 case IEEE80211_STA_MLME_ASSOCIATE:
1839 ieee80211_associate(sdata);
1840 break;
1841 case IEEE80211_STA_MLME_ASSOCIATED:
1842 ieee80211_associated(sdata);
1843 break;
1844 default:
1845 WARN_ON(1);
1846 break;
1847 }
1848
1849 if (ieee80211_privacy_mismatch(sdata)) {
1850 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
1851 "mixed-cell disabled - disassociate\n", sdata->dev->name);
1852
1853 ieee80211_set_disassoc(sdata, false, true,
1854 WLAN_REASON_UNSPECIFIED);
1855 }
1856 }
1857
1858 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
1859 {
1860 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1861 queue_work(sdata->local->hw.workqueue,
1862 &sdata->u.mgd.work);
1863 }
1864
1865 /* interface setup */
1866 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
1867 {
1868 struct ieee80211_if_managed *ifmgd;
1869
1870 ifmgd = &sdata->u.mgd;
1871 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
1872 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1873 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
1874 (unsigned long) sdata);
1875 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
1876 (unsigned long) sdata);
1877 skb_queue_head_init(&ifmgd->skb_queue);
1878
1879 ifmgd->capab = WLAN_CAPABILITY_ESS;
1880 ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN |
1881 IEEE80211_AUTH_ALG_SHARED_KEY;
1882 ifmgd->flags |= IEEE80211_STA_CREATE_IBSS |
1883 IEEE80211_STA_AUTO_BSSID_SEL |
1884 IEEE80211_STA_AUTO_CHANNEL_SEL;
1885 if (sdata->local->hw.queues >= 4)
1886 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
1887 }
1888
1889 /* configuration hooks */
1890 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata)
1891 {
1892 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1893 struct ieee80211_local *local = sdata->local;
1894
1895 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1896 return;
1897
1898 if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET |
1899 IEEE80211_STA_AUTO_BSSID_SEL)) &&
1900 (ifmgd->flags & (IEEE80211_STA_SSID_SET |
1901 IEEE80211_STA_AUTO_SSID_SEL))) {
1902
1903 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)
1904 ieee80211_set_disassoc(sdata, true, true,
1905 WLAN_REASON_DEAUTH_LEAVING);
1906
1907 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) ||
1908 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1909 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
1910 else if (ifmgd->flags & IEEE80211_STA_EXT_SME)
1911 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1912 queue_work(local->hw.workqueue, &ifmgd->work);
1913 }
1914 }
1915
1916 int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata)
1917 {
1918 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1919
1920 if (ifmgd->ssid_len)
1921 ifmgd->flags |= IEEE80211_STA_SSID_SET;
1922 else
1923 ifmgd->flags &= ~IEEE80211_STA_SSID_SET;
1924
1925 return 0;
1926 }
1927
1928 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
1929 {
1930 struct ieee80211_if_managed *ifmgd;
1931
1932 if (len > IEEE80211_MAX_SSID_LEN)
1933 return -EINVAL;
1934
1935 ifmgd = &sdata->u.mgd;
1936
1937 if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) {
1938 /*
1939 * Do not use reassociation if SSID is changed (different ESS).
1940 */
1941 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1942 memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid));
1943 memcpy(ifmgd->ssid, ssid, len);
1944 ifmgd->ssid_len = len;
1945 }
1946
1947 return ieee80211_sta_commit(sdata);
1948 }
1949
1950 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
1951 {
1952 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1953 memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len);
1954 *len = ifmgd->ssid_len;
1955 return 0;
1956 }
1957
1958 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
1959 {
1960 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1961
1962 if (is_valid_ether_addr(bssid)) {
1963 memcpy(ifmgd->bssid, bssid, ETH_ALEN);
1964 ifmgd->flags |= IEEE80211_STA_BSSID_SET;
1965 } else {
1966 memset(ifmgd->bssid, 0, ETH_ALEN);
1967 ifmgd->flags &= ~IEEE80211_STA_BSSID_SET;
1968 }
1969
1970 if (netif_running(sdata->dev)) {
1971 if (ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID)) {
1972 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
1973 "the low-level driver\n", sdata->dev->name);
1974 }
1975 }
1976
1977 return ieee80211_sta_commit(sdata);
1978 }
1979
1980 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
1981 const char *ie, size_t len)
1982 {
1983 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1984
1985 kfree(ifmgd->extra_ie);
1986 if (len == 0) {
1987 ifmgd->extra_ie = NULL;
1988 ifmgd->extra_ie_len = 0;
1989 return 0;
1990 }
1991 ifmgd->extra_ie = kmalloc(len, GFP_KERNEL);
1992 if (!ifmgd->extra_ie) {
1993 ifmgd->extra_ie_len = 0;
1994 return -ENOMEM;
1995 }
1996 memcpy(ifmgd->extra_ie, ie, len);
1997 ifmgd->extra_ie_len = len;
1998 return 0;
1999 }
2000
2001 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2002 {
2003 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2004 sdata->dev->name, reason);
2005
2006 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2007 return -EINVAL;
2008
2009 ieee80211_set_disassoc(sdata, true, true, reason);
2010 return 0;
2011 }
2012
2013 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2014 {
2015 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2016
2017 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2018 sdata->dev->name, reason);
2019
2020 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2021 return -EINVAL;
2022
2023 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED))
2024 return -ENOLINK;
2025
2026 ieee80211_set_disassoc(sdata, false, true, reason);
2027 return 0;
2028 }
2029
2030 /* scan finished notification */
2031 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2032 {
2033 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2034
2035 /* Restart STA timers */
2036 rcu_read_lock();
2037 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2038 ieee80211_restart_sta_timer(sdata);
2039 rcu_read_unlock();
2040 }
2041
2042 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
2043 {
2044 struct ieee80211_local *local =
2045 container_of(work, struct ieee80211_local,
2046 dynamic_ps_disable_work);
2047
2048 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2049 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2050 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2051 }
2052
2053 ieee80211_wake_queues_by_reason(&local->hw,
2054 IEEE80211_QUEUE_STOP_REASON_PS);
2055 }
2056
2057 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
2058 {
2059 struct ieee80211_local *local =
2060 container_of(work, struct ieee80211_local,
2061 dynamic_ps_enable_work);
2062 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2063
2064 if (local->hw.conf.flags & IEEE80211_CONF_PS)
2065 return;
2066
2067 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
2068 ieee80211_send_nullfunc(local, sdata, 1);
2069
2070 local->hw.conf.flags |= IEEE80211_CONF_PS;
2071 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2072 }
2073
2074 void ieee80211_dynamic_ps_timer(unsigned long data)
2075 {
2076 struct ieee80211_local *local = (void *) data;
2077
2078 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
2079 }
2080
2081 void ieee80211_send_nullfunc(struct ieee80211_local *local,
2082 struct ieee80211_sub_if_data *sdata,
2083 int powersave)
2084 {
2085 struct sk_buff *skb;
2086 struct ieee80211_hdr *nullfunc;
2087 __le16 fc;
2088
2089 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2090 return;
2091
2092 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
2093 if (!skb) {
2094 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
2095 "frame\n", sdata->dev->name);
2096 return;
2097 }
2098 skb_reserve(skb, local->hw.extra_tx_headroom);
2099
2100 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
2101 memset(nullfunc, 0, 24);
2102 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
2103 IEEE80211_FCTL_TODS);
2104 if (powersave)
2105 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
2106 nullfunc->frame_control = fc;
2107 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2108 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
2109 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
2110
2111 ieee80211_tx_skb(sdata, skb, 0);
2112 }
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