Merge branch 'for-linus' of git://repo.or.cz/cris-mirror
[kernel.git] / net / mac80211 / mlme.c
1 /*
2  * BSS client mode implementation
3  * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4  * Copyright 2004, Instant802 Networks, Inc.
5  * Copyright 2005, Devicescape Software, Inc.
6  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
7  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License version 2 as
11  * published by the Free Software Foundation.
12  */
13
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/rtnetlink.h>
20 #include <net/mac80211.h>
21 #include <asm/unaligned.h>
22
23 #include "ieee80211_i.h"
24 #include "rate.h"
25 #include "led.h"
26
27 #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
28 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
29 #define IEEE80211_AUTH_MAX_TRIES 3
30 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
31 #define IEEE80211_ASSOC_MAX_TRIES 3
32 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
33 #define IEEE80211_PROBE_IDLE_TIME (60 * HZ)
34 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
35
36 /* utils */
37 static int ecw2cw(int ecw)
38 {
39         return (1 << ecw) - 1;
40 }
41
42 static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
43 {
44         u8 *end, *pos;
45
46         pos = bss->cbss.information_elements;
47         if (pos == NULL)
48                 return NULL;
49         end = pos + bss->cbss.len_information_elements;
50
51         while (pos + 1 < end) {
52                 if (pos + 2 + pos[1] > end)
53                         break;
54                 if (pos[0] == ie)
55                         return pos;
56                 pos += 2 + pos[1];
57         }
58
59         return NULL;
60 }
61
62 static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
63                                       struct ieee80211_supported_band *sband,
64                                       u32 *rates)
65 {
66         int i, j, count;
67         *rates = 0;
68         count = 0;
69         for (i = 0; i < bss->supp_rates_len; i++) {
70                 int rate = (bss->supp_rates[i] & 0x7F) * 5;
71
72                 for (j = 0; j < sband->n_bitrates; j++)
73                         if (sband->bitrates[j].bitrate == rate) {
74                                 *rates |= BIT(j);
75                                 count++;
76                                 break;
77                         }
78         }
79
80         return count;
81 }
82
83 /* frame sending functions */
84
85 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
86 {
87         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
88         struct ieee80211_local *local = sdata->local;
89         struct sk_buff *skb;
90         struct ieee80211_mgmt *mgmt;
91         u8 *pos, *ies, *ht_ie;
92         int i, len, count, rates_len, supp_rates_len;
93         u16 capab;
94         struct ieee80211_bss *bss;
95         int wmm = 0;
96         struct ieee80211_supported_band *sband;
97         u32 rates = 0;
98
99         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
100                             sizeof(*mgmt) + 200 + ifmgd->extra_ie_len +
101                             ifmgd->ssid_len);
102         if (!skb) {
103                 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
104                        "frame\n", sdata->dev->name);
105                 return;
106         }
107         skb_reserve(skb, local->hw.extra_tx_headroom);
108
109         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
110
111         capab = ifmgd->capab;
112
113         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
114                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
115                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
116                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
117                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
118         }
119
120         bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
121                                    local->hw.conf.channel->center_freq,
122                                    ifmgd->ssid, ifmgd->ssid_len);
123         if (bss) {
124                 if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
125                         capab |= WLAN_CAPABILITY_PRIVACY;
126                 if (bss->wmm_used)
127                         wmm = 1;
128
129                 /* get all rates supported by the device and the AP as
130                  * some APs don't like getting a superset of their rates
131                  * in the association request (e.g. D-Link DAP 1353 in
132                  * b-only mode) */
133                 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
134
135                 if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
136                     (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
137                         capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
138
139                 ieee80211_rx_bss_put(local, bss);
140         } else {
141                 rates = ~0;
142                 rates_len = sband->n_bitrates;
143         }
144
145         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
146         memset(mgmt, 0, 24);
147         memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
148         memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
149         memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
150
151         if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) {
152                 skb_put(skb, 10);
153                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
154                                                   IEEE80211_STYPE_REASSOC_REQ);
155                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
156                 mgmt->u.reassoc_req.listen_interval =
157                                 cpu_to_le16(local->hw.conf.listen_interval);
158                 memcpy(mgmt->u.reassoc_req.current_ap, ifmgd->prev_bssid,
159                        ETH_ALEN);
160         } else {
161                 skb_put(skb, 4);
162                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
163                                                   IEEE80211_STYPE_ASSOC_REQ);
164                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
165                 mgmt->u.assoc_req.listen_interval =
166                                 cpu_to_le16(local->hw.conf.listen_interval);
167         }
168
169         /* SSID */
170         ies = pos = skb_put(skb, 2 + ifmgd->ssid_len);
171         *pos++ = WLAN_EID_SSID;
172         *pos++ = ifmgd->ssid_len;
173         memcpy(pos, ifmgd->ssid, ifmgd->ssid_len);
174
175         /* add all rates which were marked to be used above */
176         supp_rates_len = rates_len;
177         if (supp_rates_len > 8)
178                 supp_rates_len = 8;
179
180         len = sband->n_bitrates;
181         pos = skb_put(skb, supp_rates_len + 2);
182         *pos++ = WLAN_EID_SUPP_RATES;
183         *pos++ = supp_rates_len;
184
185         count = 0;
186         for (i = 0; i < sband->n_bitrates; i++) {
187                 if (BIT(i) & rates) {
188                         int rate = sband->bitrates[i].bitrate;
189                         *pos++ = (u8) (rate / 5);
190                         if (++count == 8)
191                                 break;
192                 }
193         }
194
195         if (rates_len > count) {
196                 pos = skb_put(skb, rates_len - count + 2);
197                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
198                 *pos++ = rates_len - count;
199
200                 for (i++; i < sband->n_bitrates; i++) {
201                         if (BIT(i) & rates) {
202                                 int rate = sband->bitrates[i].bitrate;
203                                 *pos++ = (u8) (rate / 5);
204                         }
205                 }
206         }
207
208         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
209                 /* 1. power capabilities */
210                 pos = skb_put(skb, 4);
211                 *pos++ = WLAN_EID_PWR_CAPABILITY;
212                 *pos++ = 2;
213                 *pos++ = 0; /* min tx power */
214                 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
215
216                 /* 2. supported channels */
217                 /* TODO: get this in reg domain format */
218                 pos = skb_put(skb, 2 * sband->n_channels + 2);
219                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
220                 *pos++ = 2 * sband->n_channels;
221                 for (i = 0; i < sband->n_channels; i++) {
222                         *pos++ = ieee80211_frequency_to_channel(
223                                         sband->channels[i].center_freq);
224                         *pos++ = 1; /* one channel in the subband*/
225                 }
226         }
227
228         if (ifmgd->extra_ie) {
229                 pos = skb_put(skb, ifmgd->extra_ie_len);
230                 memcpy(pos, ifmgd->extra_ie, ifmgd->extra_ie_len);
231         }
232
233         if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
234                 pos = skb_put(skb, 9);
235                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
236                 *pos++ = 7; /* len */
237                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
238                 *pos++ = 0x50;
239                 *pos++ = 0xf2;
240                 *pos++ = 2; /* WME */
241                 *pos++ = 0; /* WME info */
242                 *pos++ = 1; /* WME ver */
243                 *pos++ = 0;
244         }
245
246         /* wmm support is a must to HT */
247         /*
248          * IEEE802.11n does not allow TKIP/WEP as pairwise
249          * ciphers in HT mode. We still associate in non-ht
250          * mode (11a/b/g) if any one of these ciphers is
251          * configured as pairwise.
252          */
253         if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
254             sband->ht_cap.ht_supported &&
255             (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) &&
256             ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
257             (!(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))) {
258                 struct ieee80211_ht_info *ht_info =
259                         (struct ieee80211_ht_info *)(ht_ie + 2);
260                 u16 cap = sband->ht_cap.cap;
261                 __le16 tmp;
262                 u32 flags = local->hw.conf.channel->flags;
263
264                 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
265                 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
266                         if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
267                                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
268                                 cap &= ~IEEE80211_HT_CAP_SGI_40;
269                         }
270                         break;
271                 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
272                         if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
273                                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
274                                 cap &= ~IEEE80211_HT_CAP_SGI_40;
275                         }
276                         break;
277                 }
278
279                 tmp = cpu_to_le16(cap);
280                 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
281                 *pos++ = WLAN_EID_HT_CAPABILITY;
282                 *pos++ = sizeof(struct ieee80211_ht_cap);
283                 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
284                 memcpy(pos, &tmp, sizeof(u16));
285                 pos += sizeof(u16);
286                 /* TODO: needs a define here for << 2 */
287                 *pos++ = sband->ht_cap.ampdu_factor |
288                          (sband->ht_cap.ampdu_density << 2);
289                 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
290         }
291
292         kfree(ifmgd->assocreq_ies);
293         ifmgd->assocreq_ies_len = (skb->data + skb->len) - ies;
294         ifmgd->assocreq_ies = kmalloc(ifmgd->assocreq_ies_len, GFP_KERNEL);
295         if (ifmgd->assocreq_ies)
296                 memcpy(ifmgd->assocreq_ies, ies, ifmgd->assocreq_ies_len);
297
298         ieee80211_tx_skb(sdata, skb, 0);
299 }
300
301
302 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
303                                            u16 stype, u16 reason)
304 {
305         struct ieee80211_local *local = sdata->local;
306         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
307         struct sk_buff *skb;
308         struct ieee80211_mgmt *mgmt;
309
310         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
311         if (!skb) {
312                 printk(KERN_DEBUG "%s: failed to allocate buffer for "
313                        "deauth/disassoc frame\n", sdata->dev->name);
314                 return;
315         }
316         skb_reserve(skb, local->hw.extra_tx_headroom);
317
318         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
319         memset(mgmt, 0, 24);
320         memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
321         memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
322         memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
323         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
324         skb_put(skb, 2);
325         /* u.deauth.reason_code == u.disassoc.reason_code */
326         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
327
328         ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
329 }
330
331 void ieee80211_send_pspoll(struct ieee80211_local *local,
332                            struct ieee80211_sub_if_data *sdata)
333 {
334         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
335         struct ieee80211_pspoll *pspoll;
336         struct sk_buff *skb;
337         u16 fc;
338
339         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
340         if (!skb) {
341                 printk(KERN_DEBUG "%s: failed to allocate buffer for "
342                        "pspoll frame\n", sdata->dev->name);
343                 return;
344         }
345         skb_reserve(skb, local->hw.extra_tx_headroom);
346
347         pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
348         memset(pspoll, 0, sizeof(*pspoll));
349         fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
350         pspoll->frame_control = cpu_to_le16(fc);
351         pspoll->aid = cpu_to_le16(ifmgd->aid);
352
353         /* aid in PS-Poll has its two MSBs each set to 1 */
354         pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
355
356         memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
357         memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
358
359         ieee80211_tx_skb(sdata, skb, 0);
360 }
361
362 /* MLME */
363 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
364                                      struct ieee80211_if_managed *ifmgd,
365                                      u8 *wmm_param, size_t wmm_param_len)
366 {
367         struct ieee80211_tx_queue_params params;
368         size_t left;
369         int count;
370         u8 *pos;
371
372         if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
373                 return;
374
375         if (!wmm_param)
376                 return;
377
378         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
379                 return;
380         count = wmm_param[6] & 0x0f;
381         if (count == ifmgd->wmm_last_param_set)
382                 return;
383         ifmgd->wmm_last_param_set = count;
384
385         pos = wmm_param + 8;
386         left = wmm_param_len - 8;
387
388         memset(&params, 0, sizeof(params));
389
390         local->wmm_acm = 0;
391         for (; left >= 4; left -= 4, pos += 4) {
392                 int aci = (pos[0] >> 5) & 0x03;
393                 int acm = (pos[0] >> 4) & 0x01;
394                 int queue;
395
396                 switch (aci) {
397                 case 1: /* AC_BK */
398                         queue = 3;
399                         if (acm)
400                                 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
401                         break;
402                 case 2: /* AC_VI */
403                         queue = 1;
404                         if (acm)
405                                 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
406                         break;
407                 case 3: /* AC_VO */
408                         queue = 0;
409                         if (acm)
410                                 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
411                         break;
412                 case 0: /* AC_BE */
413                 default:
414                         queue = 2;
415                         if (acm)
416                                 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
417                         break;
418                 }
419
420                 params.aifs = pos[0] & 0x0f;
421                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
422                 params.cw_min = ecw2cw(pos[1] & 0x0f);
423                 params.txop = get_unaligned_le16(pos + 2);
424 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
425                 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
426                        "cWmin=%d cWmax=%d txop=%d\n",
427                        local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
428                        params.cw_max, params.txop);
429 #endif
430                 if (local->ops->conf_tx &&
431                     local->ops->conf_tx(local_to_hw(local), queue, &params)) {
432                         printk(KERN_DEBUG "%s: failed to set TX queue "
433                                "parameters for queue %d\n", local->mdev->name, queue);
434                 }
435         }
436 }
437
438 static bool ieee80211_check_tim(struct ieee802_11_elems *elems, u16 aid)
439 {
440         u8 mask;
441         u8 index, indexn1, indexn2;
442         struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *) elems->tim;
443
444         if (unlikely(!tim || elems->tim_len < 4))
445                 return false;
446
447         aid &= 0x3fff;
448         index = aid / 8;
449         mask  = 1 << (aid & 7);
450
451         indexn1 = tim->bitmap_ctrl & 0xfe;
452         indexn2 = elems->tim_len + indexn1 - 4;
453
454         if (index < indexn1 || index > indexn2)
455                 return false;
456
457         index -= indexn1;
458
459         return !!(tim->virtual_map[index] & mask);
460 }
461
462 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
463                                            u16 capab, bool erp_valid, u8 erp)
464 {
465         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
466 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
467         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
468 #endif
469         u32 changed = 0;
470         bool use_protection;
471         bool use_short_preamble;
472         bool use_short_slot;
473
474         if (erp_valid) {
475                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
476                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
477         } else {
478                 use_protection = false;
479                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
480         }
481
482         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
483
484         if (use_protection != bss_conf->use_cts_prot) {
485 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
486                 if (net_ratelimit()) {
487                         printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
488                                sdata->dev->name,
489                                use_protection ? "enabled" : "disabled",
490                                ifmgd->bssid);
491                 }
492 #endif
493                 bss_conf->use_cts_prot = use_protection;
494                 changed |= BSS_CHANGED_ERP_CTS_PROT;
495         }
496
497         if (use_short_preamble != bss_conf->use_short_preamble) {
498 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
499                 if (net_ratelimit()) {
500                         printk(KERN_DEBUG "%s: switched to %s barker preamble"
501                                " (BSSID=%pM)\n",
502                                sdata->dev->name,
503                                use_short_preamble ? "short" : "long",
504                                ifmgd->bssid);
505                 }
506 #endif
507                 bss_conf->use_short_preamble = use_short_preamble;
508                 changed |= BSS_CHANGED_ERP_PREAMBLE;
509         }
510
511         if (use_short_slot != bss_conf->use_short_slot) {
512 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
513                 if (net_ratelimit()) {
514                         printk(KERN_DEBUG "%s: switched to %s slot time"
515                                " (BSSID=%pM)\n",
516                                sdata->dev->name,
517                                use_short_slot ? "short" : "long",
518                                ifmgd->bssid);
519                 }
520 #endif
521                 bss_conf->use_short_slot = use_short_slot;
522                 changed |= BSS_CHANGED_ERP_SLOT;
523         }
524
525         return changed;
526 }
527
528 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata)
529 {
530         union iwreq_data wrqu;
531
532         memset(&wrqu, 0, sizeof(wrqu));
533         if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED)
534                 memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN);
535         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
536         wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
537 }
538
539 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata)
540 {
541         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
542         char *buf;
543         size_t len;
544         int i;
545         union iwreq_data wrqu;
546
547         if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies)
548                 return;
549
550         buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len +
551                                 ifmgd->assocresp_ies_len), GFP_KERNEL);
552         if (!buf)
553                 return;
554
555         len = sprintf(buf, "ASSOCINFO(");
556         if (ifmgd->assocreq_ies) {
557                 len += sprintf(buf + len, "ReqIEs=");
558                 for (i = 0; i < ifmgd->assocreq_ies_len; i++) {
559                         len += sprintf(buf + len, "%02x",
560                                        ifmgd->assocreq_ies[i]);
561                 }
562         }
563         if (ifmgd->assocresp_ies) {
564                 if (ifmgd->assocreq_ies)
565                         len += sprintf(buf + len, " ");
566                 len += sprintf(buf + len, "RespIEs=");
567                 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
568                         len += sprintf(buf + len, "%02x",
569                                        ifmgd->assocresp_ies[i]);
570                 }
571         }
572         len += sprintf(buf + len, ")");
573
574         if (len > IW_CUSTOM_MAX) {
575                 len = sprintf(buf, "ASSOCRESPIE=");
576                 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
577                         len += sprintf(buf + len, "%02x",
578                                        ifmgd->assocresp_ies[i]);
579                 }
580         }
581
582         if (len <= IW_CUSTOM_MAX) {
583                 memset(&wrqu, 0, sizeof(wrqu));
584                 wrqu.data.length = len;
585                 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
586         }
587
588         kfree(buf);
589 }
590
591
592 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
593                                      u32 bss_info_changed)
594 {
595         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
596         struct ieee80211_local *local = sdata->local;
597         struct ieee80211_conf *conf = &local_to_hw(local)->conf;
598
599         struct ieee80211_bss *bss;
600
601         bss_info_changed |= BSS_CHANGED_ASSOC;
602         ifmgd->flags |= IEEE80211_STA_ASSOCIATED;
603
604         bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
605                                    conf->channel->center_freq,
606                                    ifmgd->ssid, ifmgd->ssid_len);
607         if (bss) {
608                 /* set timing information */
609                 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
610                 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
611                 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
612
613                 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
614                         bss->cbss.capability, bss->has_erp_value, bss->erp_value);
615
616                 cfg80211_hold_bss(&bss->cbss);
617
618                 ieee80211_rx_bss_put(local, bss);
619         }
620
621         ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET;
622         memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN);
623         ieee80211_sta_send_associnfo(sdata);
624
625         ifmgd->last_probe = jiffies;
626         ieee80211_led_assoc(local, 1);
627
628         sdata->vif.bss_conf.assoc = 1;
629         /*
630          * For now just always ask the driver to update the basic rateset
631          * when we have associated, we aren't checking whether it actually
632          * changed or not.
633          */
634         bss_info_changed |= BSS_CHANGED_BASIC_RATES;
635         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
636
637         if (local->powersave) {
638                 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) &&
639                     local->hw.conf.dynamic_ps_timeout > 0) {
640                         mod_timer(&local->dynamic_ps_timer, jiffies +
641                                   msecs_to_jiffies(
642                                         local->hw.conf.dynamic_ps_timeout));
643                 } else {
644                         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
645                                 ieee80211_send_nullfunc(local, sdata, 1);
646                         conf->flags |= IEEE80211_CONF_PS;
647                         ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
648                 }
649         }
650
651         netif_tx_start_all_queues(sdata->dev);
652         netif_carrier_on(sdata->dev);
653
654         ieee80211_sta_send_apinfo(sdata);
655 }
656
657 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata)
658 {
659         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
660         struct ieee80211_local *local = sdata->local;
661
662         ifmgd->direct_probe_tries++;
663         if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
664                 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
665                        sdata->dev->name, ifmgd->bssid);
666                 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
667                 ieee80211_sta_send_apinfo(sdata);
668
669                 /*
670                  * Most likely AP is not in the range so remove the
671                  * bss information associated to the AP
672                  */
673                 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
674                                 sdata->local->hw.conf.channel->center_freq,
675                                 ifmgd->ssid, ifmgd->ssid_len);
676
677                 /*
678                  * We might have a pending scan which had no chance to run yet
679                  * due to state == IEEE80211_STA_MLME_DIRECT_PROBE.
680                  * Hence, queue the STAs work again
681                  */
682                 queue_work(local->hw.workqueue, &ifmgd->work);
683                 return;
684         }
685
686         printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
687                         sdata->dev->name, ifmgd->bssid,
688                         ifmgd->direct_probe_tries);
689
690         ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
691
692         set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifmgd->request);
693
694         /* Direct probe is sent to broadcast address as some APs
695          * will not answer to direct packet in unassociated state.
696          */
697         ieee80211_send_probe_req(sdata, NULL,
698                                  ifmgd->ssid, ifmgd->ssid_len, NULL, 0);
699
700         mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
701 }
702
703
704 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata)
705 {
706         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
707         struct ieee80211_local *local = sdata->local;
708         u8 *ies;
709         size_t ies_len;
710
711         ifmgd->auth_tries++;
712         if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
713                 printk(KERN_DEBUG "%s: authentication with AP %pM"
714                        " timed out\n",
715                        sdata->dev->name, ifmgd->bssid);
716                 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
717                 ieee80211_sta_send_apinfo(sdata);
718                 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
719                                 sdata->local->hw.conf.channel->center_freq,
720                                 ifmgd->ssid, ifmgd->ssid_len);
721
722                 /*
723                  * We might have a pending scan which had no chance to run yet
724                  * due to state == IEEE80211_STA_MLME_AUTHENTICATE.
725                  * Hence, queue the STAs work again
726                  */
727                 queue_work(local->hw.workqueue, &ifmgd->work);
728                 return;
729         }
730
731         ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
732         printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
733                sdata->dev->name, ifmgd->bssid);
734
735         if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
736                 ies = ifmgd->sme_auth_ie;
737                 ies_len = ifmgd->sme_auth_ie_len;
738         } else {
739                 ies = NULL;
740                 ies_len = 0;
741         }
742         ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ies, ies_len,
743                             ifmgd->bssid, 0);
744         ifmgd->auth_transaction = 2;
745
746         mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
747 }
748
749 /*
750  * The disassoc 'reason' argument can be either our own reason
751  * if self disconnected or a reason code from the AP.
752  */
753 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
754                                    bool deauth, bool self_disconnected,
755                                    u16 reason)
756 {
757         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
758         struct ieee80211_local *local = sdata->local;
759         struct ieee80211_conf *conf = &local_to_hw(local)->conf;
760         struct ieee80211_bss *bss;
761         struct sta_info *sta;
762         u32 changed = 0, config_changed = 0;
763
764         rcu_read_lock();
765
766         sta = sta_info_get(local, ifmgd->bssid);
767         if (!sta) {
768                 rcu_read_unlock();
769                 return;
770         }
771
772         if (deauth) {
773                 ifmgd->direct_probe_tries = 0;
774                 ifmgd->auth_tries = 0;
775         }
776         ifmgd->assoc_scan_tries = 0;
777         ifmgd->assoc_tries = 0;
778
779         netif_tx_stop_all_queues(sdata->dev);
780         netif_carrier_off(sdata->dev);
781
782         ieee80211_sta_tear_down_BA_sessions(sta);
783
784         bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
785                                    conf->channel->center_freq,
786                                    ifmgd->ssid, ifmgd->ssid_len);
787
788         if (bss) {
789                 cfg80211_unhold_bss(&bss->cbss);
790                 ieee80211_rx_bss_put(local, bss);
791         }
792
793         if (self_disconnected) {
794                 if (deauth)
795                         ieee80211_send_deauth_disassoc(sdata,
796                                 IEEE80211_STYPE_DEAUTH, reason);
797                 else
798                         ieee80211_send_deauth_disassoc(sdata,
799                                 IEEE80211_STYPE_DISASSOC, reason);
800         }
801
802         ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
803         changed |= ieee80211_reset_erp_info(sdata);
804
805         ieee80211_led_assoc(local, 0);
806         changed |= BSS_CHANGED_ASSOC;
807         sdata->vif.bss_conf.assoc = false;
808
809         ieee80211_sta_send_apinfo(sdata);
810
811         if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
812                 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
813                 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
814                                 sdata->local->hw.conf.channel->center_freq,
815                                 ifmgd->ssid, ifmgd->ssid_len);
816         }
817
818         rcu_read_unlock();
819
820         /* channel(_type) changes are handled by ieee80211_hw_config */
821         local->oper_channel_type = NL80211_CHAN_NO_HT;
822
823         local->power_constr_level = 0;
824
825         del_timer_sync(&local->dynamic_ps_timer);
826         cancel_work_sync(&local->dynamic_ps_enable_work);
827
828         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
829                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
830                 config_changed |= IEEE80211_CONF_CHANGE_PS;
831         }
832
833         ieee80211_hw_config(local, config_changed);
834         ieee80211_bss_info_change_notify(sdata, changed);
835
836         rcu_read_lock();
837
838         sta = sta_info_get(local, ifmgd->bssid);
839         if (!sta) {
840                 rcu_read_unlock();
841                 return;
842         }
843
844         sta_info_unlink(&sta);
845
846         rcu_read_unlock();
847
848         sta_info_destroy(sta);
849 }
850
851 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
852 {
853         if (!sdata || !sdata->default_key ||
854             sdata->default_key->conf.alg != ALG_WEP)
855                 return 0;
856         return 1;
857 }
858
859 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata)
860 {
861         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
862         struct ieee80211_local *local = sdata->local;
863         struct ieee80211_bss *bss;
864         int bss_privacy;
865         int wep_privacy;
866         int privacy_invoked;
867
868         if (!ifmgd || (ifmgd->flags & IEEE80211_STA_EXT_SME))
869                 return 0;
870
871         bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
872                                    local->hw.conf.channel->center_freq,
873                                    ifmgd->ssid, ifmgd->ssid_len);
874         if (!bss)
875                 return 0;
876
877         bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY);
878         wep_privacy = !!ieee80211_sta_wep_configured(sdata);
879         privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED);
880
881         ieee80211_rx_bss_put(local, bss);
882
883         if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
884                 return 0;
885
886         return 1;
887 }
888
889 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata)
890 {
891         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
892         struct ieee80211_local *local = sdata->local;
893
894         ifmgd->assoc_tries++;
895         if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
896                 printk(KERN_DEBUG "%s: association with AP %pM"
897                        " timed out\n",
898                        sdata->dev->name, ifmgd->bssid);
899                 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
900                 ieee80211_sta_send_apinfo(sdata);
901                 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
902                                 sdata->local->hw.conf.channel->center_freq,
903                                 ifmgd->ssid, ifmgd->ssid_len);
904                 /*
905                  * We might have a pending scan which had no chance to run yet
906                  * due to state == IEEE80211_STA_MLME_ASSOCIATE.
907                  * Hence, queue the STAs work again
908                  */
909                 queue_work(local->hw.workqueue, &ifmgd->work);
910                 return;
911         }
912
913         ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
914         printk(KERN_DEBUG "%s: associate with AP %pM\n",
915                sdata->dev->name, ifmgd->bssid);
916         if (ieee80211_privacy_mismatch(sdata)) {
917                 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
918                        "mixed-cell disabled - abort association\n", sdata->dev->name);
919                 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
920                 return;
921         }
922
923         ieee80211_send_assoc(sdata);
924
925         mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
926 }
927
928 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
929                              struct ieee80211_hdr *hdr)
930 {
931         /*
932          * We can postpone the mgd.timer whenever receiving unicast frames
933          * from AP because we know that the connection is working both ways
934          * at that time. But multicast frames (and hence also beacons) must
935          * be ignored here, because we need to trigger the timer during
936          * data idle periods for sending the periodical probe request to
937          * the AP.
938          */
939         if (!is_multicast_ether_addr(hdr->addr1))
940                 mod_timer(&sdata->u.mgd.timer,
941                           jiffies + IEEE80211_MONITORING_INTERVAL);
942 }
943
944 void ieee80211_beacon_loss_work(struct work_struct *work)
945 {
946         struct ieee80211_sub_if_data *sdata =
947                 container_of(work, struct ieee80211_sub_if_data,
948                              u.mgd.beacon_loss_work);
949         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
950
951 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
952         if (net_ratelimit()) {
953                 printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM "
954                        "- sending probe request\n", sdata->dev->name,
955                        sdata->u.mgd.bssid);
956         }
957 #endif
958
959         ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
960         ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
961                                  ifmgd->ssid_len, NULL, 0);
962
963         mod_timer(&ifmgd->timer, jiffies + IEEE80211_MONITORING_INTERVAL);
964 }
965
966 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
967 {
968         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
969
970         queue_work(sdata->local->hw.workqueue,
971                    &sdata->u.mgd.beacon_loss_work);
972 }
973 EXPORT_SYMBOL(ieee80211_beacon_loss);
974
975 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
976 {
977         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
978         struct ieee80211_local *local = sdata->local;
979         struct sta_info *sta;
980         bool disassoc = false;
981
982         /* TODO: start monitoring current AP signal quality and number of
983          * missed beacons. Scan other channels every now and then and search
984          * for better APs. */
985         /* TODO: remove expired BSSes */
986
987         ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED;
988
989         rcu_read_lock();
990
991         sta = sta_info_get(local, ifmgd->bssid);
992         if (!sta) {
993                 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
994                        sdata->dev->name, ifmgd->bssid);
995                 disassoc = true;
996                 goto unlock;
997         }
998
999         if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) &&
1000             time_after(jiffies, sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
1001                 printk(KERN_DEBUG "%s: no probe response from AP %pM "
1002                        "- disassociating\n",
1003                        sdata->dev->name, ifmgd->bssid);
1004                 disassoc = true;
1005                 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1006                 goto unlock;
1007         }
1008
1009         /*
1010          * Beacon filtering is only enabled with power save and then the
1011          * stack should not check for beacon loss.
1012          */
1013         if (!((local->hw.flags & IEEE80211_HW_BEACON_FILTER) &&
1014               (local->hw.conf.flags & IEEE80211_CONF_PS)) &&
1015             time_after(jiffies,
1016                        ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) {
1017 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1018                 if (net_ratelimit()) {
1019                         printk(KERN_DEBUG "%s: beacon loss from AP %pM "
1020                                "- sending probe request\n",
1021                                sdata->dev->name, ifmgd->bssid);
1022                 }
1023 #endif
1024                 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1025                 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1026                                          ifmgd->ssid_len, NULL, 0);
1027                 goto unlock;
1028
1029         }
1030
1031         if (time_after(jiffies, sta->last_rx + IEEE80211_PROBE_IDLE_TIME)) {
1032                 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1033                 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1034                                          ifmgd->ssid_len, NULL, 0);
1035         }
1036
1037  unlock:
1038         rcu_read_unlock();
1039
1040         if (disassoc)
1041                 ieee80211_set_disassoc(sdata, true, true,
1042                                         WLAN_REASON_PREV_AUTH_NOT_VALID);
1043         else
1044                 mod_timer(&ifmgd->timer, jiffies +
1045                                       IEEE80211_MONITORING_INTERVAL);
1046 }
1047
1048
1049 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata)
1050 {
1051         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1052
1053         printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1054         ifmgd->flags |= IEEE80211_STA_AUTHENTICATED;
1055         if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1056                 /* Wait for SME to request association */
1057                 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1058         } else
1059                 ieee80211_associate(sdata);
1060 }
1061
1062
1063 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1064                                      struct ieee80211_mgmt *mgmt,
1065                                      size_t len)
1066 {
1067         u8 *pos;
1068         struct ieee802_11_elems elems;
1069
1070         pos = mgmt->u.auth.variable;
1071         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1072         if (!elems.challenge)
1073                 return;
1074         ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg,
1075                             elems.challenge - 2, elems.challenge_len + 2,
1076                             sdata->u.mgd.bssid, 1);
1077         sdata->u.mgd.auth_transaction = 4;
1078 }
1079
1080 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1081                                    struct ieee80211_mgmt *mgmt,
1082                                    size_t len)
1083 {
1084         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1085         u16 auth_alg, auth_transaction, status_code;
1086
1087         if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE)
1088                 return;
1089
1090         if (len < 24 + 6)
1091                 return;
1092
1093         if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1094                 return;
1095
1096         if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1097                 return;
1098
1099         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1100         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1101         status_code = le16_to_cpu(mgmt->u.auth.status_code);
1102
1103         if (auth_alg != ifmgd->auth_alg ||
1104             auth_transaction != ifmgd->auth_transaction)
1105                 return;
1106
1107         if (status_code != WLAN_STATUS_SUCCESS) {
1108                 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1109                         u8 algs[3];
1110                         const int num_algs = ARRAY_SIZE(algs);
1111                         int i, pos;
1112                         algs[0] = algs[1] = algs[2] = 0xff;
1113                         if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1114                                 algs[0] = WLAN_AUTH_OPEN;
1115                         if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1116                                 algs[1] = WLAN_AUTH_SHARED_KEY;
1117                         if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1118                                 algs[2] = WLAN_AUTH_LEAP;
1119                         if (ifmgd->auth_alg == WLAN_AUTH_OPEN)
1120                                 pos = 0;
1121                         else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY)
1122                                 pos = 1;
1123                         else
1124                                 pos = 2;
1125                         for (i = 0; i < num_algs; i++) {
1126                                 pos++;
1127                                 if (pos >= num_algs)
1128                                         pos = 0;
1129                                 if (algs[pos] == ifmgd->auth_alg ||
1130                                     algs[pos] == 0xff)
1131                                         continue;
1132                                 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1133                                     !ieee80211_sta_wep_configured(sdata))
1134                                         continue;
1135                                 ifmgd->auth_alg = algs[pos];
1136                                 break;
1137                         }
1138                 }
1139                 return;
1140         }
1141
1142         switch (ifmgd->auth_alg) {
1143         case WLAN_AUTH_OPEN:
1144         case WLAN_AUTH_LEAP:
1145         case WLAN_AUTH_FT:
1146                 ieee80211_auth_completed(sdata);
1147                 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1148                 break;
1149         case WLAN_AUTH_SHARED_KEY:
1150                 if (ifmgd->auth_transaction == 4) {
1151                         ieee80211_auth_completed(sdata);
1152                         cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1153                 } else
1154                         ieee80211_auth_challenge(sdata, mgmt, len);
1155                 break;
1156         }
1157 }
1158
1159
1160 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1161                                      struct ieee80211_mgmt *mgmt,
1162                                      size_t len)
1163 {
1164         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1165         u16 reason_code;
1166
1167         if (len < 24 + 2)
1168                 return;
1169
1170         if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1171                 return;
1172
1173         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1174
1175         if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED)
1176                 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1177                                 sdata->dev->name, reason_code);
1178
1179         if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1180             (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1181              ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE ||
1182              ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) {
1183                 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1184                 mod_timer(&ifmgd->timer, jiffies +
1185                                       IEEE80211_RETRY_AUTH_INTERVAL);
1186         }
1187
1188         ieee80211_set_disassoc(sdata, true, false, 0);
1189         ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED;
1190         cfg80211_send_rx_deauth(sdata->dev, (u8 *) mgmt, len);
1191 }
1192
1193
1194 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1195                                        struct ieee80211_mgmt *mgmt,
1196                                        size_t len)
1197 {
1198         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1199         u16 reason_code;
1200
1201         if (len < 24 + 2)
1202                 return;
1203
1204         if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1205                 return;
1206
1207         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1208
1209         if (ifmgd->flags & IEEE80211_STA_ASSOCIATED)
1210                 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1211                                 sdata->dev->name, reason_code);
1212
1213         if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1214             ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1215                 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1216                 mod_timer(&ifmgd->timer, jiffies +
1217                                       IEEE80211_RETRY_AUTH_INTERVAL);
1218         }
1219
1220         ieee80211_set_disassoc(sdata, false, false, reason_code);
1221         cfg80211_send_rx_disassoc(sdata->dev, (u8 *) mgmt, len);
1222 }
1223
1224
1225 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1226                                          struct ieee80211_mgmt *mgmt,
1227                                          size_t len,
1228                                          int reassoc)
1229 {
1230         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1231         struct ieee80211_local *local = sdata->local;
1232         struct ieee80211_supported_band *sband;
1233         struct sta_info *sta;
1234         u32 rates, basic_rates;
1235         u16 capab_info, status_code, aid;
1236         struct ieee802_11_elems elems;
1237         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1238         u8 *pos;
1239         u32 changed = 0;
1240         int i, j;
1241         bool have_higher_than_11mbit = false, newsta = false;
1242         u16 ap_ht_cap_flags;
1243
1244         /* AssocResp and ReassocResp have identical structure, so process both
1245          * of them in this function. */
1246
1247         if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1248                 return;
1249
1250         if (len < 24 + 6)
1251                 return;
1252
1253         if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1254                 return;
1255
1256         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1257         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1258         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1259
1260         printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1261                "status=%d aid=%d)\n",
1262                sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1263                capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1264
1265         pos = mgmt->u.assoc_resp.variable;
1266         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1267
1268         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1269             elems.timeout_int && elems.timeout_int_len == 5 &&
1270             elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1271                 u32 tu, ms;
1272                 tu = get_unaligned_le32(elems.timeout_int + 1);
1273                 ms = tu * 1024 / 1000;
1274                 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1275                        "comeback duration %u TU (%u ms)\n",
1276                        sdata->dev->name, tu, ms);
1277                 if (ms > IEEE80211_ASSOC_TIMEOUT)
1278                         mod_timer(&ifmgd->timer,
1279                                   jiffies + msecs_to_jiffies(ms));
1280                 return;
1281         }
1282
1283         if (status_code != WLAN_STATUS_SUCCESS) {
1284                 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1285                        sdata->dev->name, status_code);
1286                 /* if this was a reassociation, ensure we try a "full"
1287                  * association next time. This works around some broken APs
1288                  * which do not correctly reject reassociation requests. */
1289                 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1290                 return;
1291         }
1292
1293         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1294                 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1295                        "set\n", sdata->dev->name, aid);
1296         aid &= ~(BIT(15) | BIT(14));
1297
1298         if (!elems.supp_rates) {
1299                 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1300                        sdata->dev->name);
1301                 return;
1302         }
1303
1304         printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1305         ifmgd->aid = aid;
1306         ifmgd->ap_capab = capab_info;
1307
1308         kfree(ifmgd->assocresp_ies);
1309         ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1310         ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL);
1311         if (ifmgd->assocresp_ies)
1312                 memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len);
1313
1314         rcu_read_lock();
1315
1316         /* Add STA entry for the AP */
1317         sta = sta_info_get(local, ifmgd->bssid);
1318         if (!sta) {
1319                 newsta = true;
1320
1321                 sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC);
1322                 if (!sta) {
1323                         printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1324                                " the AP\n", sdata->dev->name);
1325                         rcu_read_unlock();
1326                         return;
1327                 }
1328
1329                 /* update new sta with its last rx activity */
1330                 sta->last_rx = jiffies;
1331         }
1332
1333         /*
1334          * FIXME: Do we really need to update the sta_info's information here?
1335          *        We already know about the AP (we found it in our list) so it
1336          *        should already be filled with the right info, no?
1337          *        As is stands, all this is racy because typically we assume
1338          *        the information that is filled in here (except flags) doesn't
1339          *        change while a STA structure is alive. As such, it should move
1340          *        to between the sta_info_alloc() and sta_info_insert() above.
1341          */
1342
1343         set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1344                            WLAN_STA_AUTHORIZED);
1345
1346         rates = 0;
1347         basic_rates = 0;
1348         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1349
1350         for (i = 0; i < elems.supp_rates_len; i++) {
1351                 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1352                 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1353
1354                 if (rate > 110)
1355                         have_higher_than_11mbit = true;
1356
1357                 for (j = 0; j < sband->n_bitrates; j++) {
1358                         if (sband->bitrates[j].bitrate == rate) {
1359                                 rates |= BIT(j);
1360                                 if (is_basic)
1361                                         basic_rates |= BIT(j);
1362                                 break;
1363                         }
1364                 }
1365         }
1366
1367         for (i = 0; i < elems.ext_supp_rates_len; i++) {
1368                 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1369                 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1370
1371                 if (rate > 110)
1372                         have_higher_than_11mbit = true;
1373
1374                 for (j = 0; j < sband->n_bitrates; j++) {
1375                         if (sband->bitrates[j].bitrate == rate) {
1376                                 rates |= BIT(j);
1377                                 if (is_basic)
1378                                         basic_rates |= BIT(j);
1379                                 break;
1380                         }
1381                 }
1382         }
1383
1384         sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1385         sdata->vif.bss_conf.basic_rates = basic_rates;
1386
1387         /* cf. IEEE 802.11 9.2.12 */
1388         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1389             have_higher_than_11mbit)
1390                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1391         else
1392                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1393
1394         /* If TKIP/WEP is used, no need to parse AP's HT capabilities */
1395         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1396                 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1397                                 elems.ht_cap_elem, &sta->sta.ht_cap);
1398
1399         ap_ht_cap_flags = sta->sta.ht_cap.cap;
1400
1401         rate_control_rate_init(sta);
1402
1403         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1404                 set_sta_flags(sta, WLAN_STA_MFP);
1405
1406         if (elems.wmm_param)
1407                 set_sta_flags(sta, WLAN_STA_WME);
1408
1409         if (newsta) {
1410                 int err = sta_info_insert(sta);
1411                 if (err) {
1412                         printk(KERN_DEBUG "%s: failed to insert STA entry for"
1413                                " the AP (error %d)\n", sdata->dev->name, err);
1414                         rcu_read_unlock();
1415                         return;
1416                 }
1417         }
1418
1419         rcu_read_unlock();
1420
1421         if (elems.wmm_param)
1422                 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1423                                          elems.wmm_param_len);
1424
1425         if (elems.ht_info_elem && elems.wmm_param &&
1426             (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1427             !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1428                 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1429                                                ap_ht_cap_flags);
1430
1431         /* set AID and assoc capability,
1432          * ieee80211_set_associated() will tell the driver */
1433         bss_conf->aid = aid;
1434         bss_conf->assoc_capability = capab_info;
1435         ieee80211_set_associated(sdata, changed);
1436
1437         /*
1438          * initialise the time of last beacon to be the association time,
1439          * otherwise beacon loss check will trigger immediately
1440          */
1441         ifmgd->last_beacon = jiffies;
1442
1443         ieee80211_associated(sdata);
1444         cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1445 }
1446
1447
1448 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1449                                   struct ieee80211_mgmt *mgmt,
1450                                   size_t len,
1451                                   struct ieee80211_rx_status *rx_status,
1452                                   struct ieee802_11_elems *elems,
1453                                   bool beacon)
1454 {
1455         struct ieee80211_local *local = sdata->local;
1456         int freq;
1457         struct ieee80211_bss *bss;
1458         struct ieee80211_channel *channel;
1459
1460         if (elems->ds_params && elems->ds_params_len == 1)
1461                 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1462         else
1463                 freq = rx_status->freq;
1464
1465         channel = ieee80211_get_channel(local->hw.wiphy, freq);
1466
1467         if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1468                 return;
1469
1470         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1471                                         channel, beacon);
1472         if (!bss)
1473                 return;
1474
1475         if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1476             (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) {
1477                 struct ieee80211_channel_sw_ie *sw_elem =
1478                         (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1479                 ieee80211_process_chanswitch(sdata, sw_elem, bss);
1480         }
1481
1482         ieee80211_rx_bss_put(local, bss);
1483 }
1484
1485
1486 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1487                                          struct ieee80211_mgmt *mgmt,
1488                                          size_t len,
1489                                          struct ieee80211_rx_status *rx_status)
1490 {
1491         struct ieee80211_if_managed *ifmgd;
1492         size_t baselen;
1493         struct ieee802_11_elems elems;
1494
1495         ifmgd = &sdata->u.mgd;
1496
1497         if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1498                 return; /* ignore ProbeResp to foreign address */
1499
1500         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1501         if (baselen > len)
1502                 return;
1503
1504         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1505                                 &elems);
1506
1507         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1508
1509         /* direct probe may be part of the association flow */
1510         if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1511                                &ifmgd->request)) {
1512                 printk(KERN_DEBUG "%s direct probe responded\n",
1513                        sdata->dev->name);
1514                 ieee80211_authenticate(sdata);
1515         }
1516
1517         if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
1518                 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1519 }
1520
1521 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1522                                      struct ieee80211_mgmt *mgmt,
1523                                      size_t len,
1524                                      struct ieee80211_rx_status *rx_status)
1525 {
1526         struct ieee80211_if_managed *ifmgd;
1527         size_t baselen;
1528         struct ieee802_11_elems elems;
1529         struct ieee80211_local *local = sdata->local;
1530         u32 changed = 0;
1531         bool erp_valid, directed_tim;
1532         u8 erp_value = 0;
1533
1534         /* Process beacon from the current BSS */
1535         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1536         if (baselen > len)
1537                 return;
1538
1539         ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1540
1541         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
1542
1543         if (sdata->vif.type != NL80211_IFTYPE_STATION)
1544                 return;
1545
1546         ifmgd = &sdata->u.mgd;
1547
1548         if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) ||
1549             memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1550                 return;
1551
1552         if (rx_status->freq != local->hw.conf.channel->center_freq)
1553                 return;
1554
1555         ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1556                                  elems.wmm_param_len);
1557
1558         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1559                 directed_tim = ieee80211_check_tim(&elems, ifmgd->aid);
1560
1561                 if (directed_tim) {
1562                         if (local->hw.conf.dynamic_ps_timeout > 0) {
1563                                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1564                                 ieee80211_hw_config(local,
1565                                                     IEEE80211_CONF_CHANGE_PS);
1566                                 ieee80211_send_nullfunc(local, sdata, 0);
1567                         } else {
1568                                 local->pspolling = true;
1569
1570                                 /*
1571                                  * Here is assumed that the driver will be
1572                                  * able to send ps-poll frame and receive a
1573                                  * response even though power save mode is
1574                                  * enabled, but some drivers might require
1575                                  * to disable power save here. This needs
1576                                  * to be investigated.
1577                                  */
1578                                 ieee80211_send_pspoll(local, sdata);
1579                         }
1580                 }
1581         }
1582
1583         if (elems.erp_info && elems.erp_info_len >= 1) {
1584                 erp_valid = true;
1585                 erp_value = elems.erp_info[0];
1586         } else {
1587                 erp_valid = false;
1588         }
1589         changed |= ieee80211_handle_bss_capability(sdata,
1590                         le16_to_cpu(mgmt->u.beacon.capab_info),
1591                         erp_valid, erp_value);
1592
1593
1594         if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1595             !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) {
1596                 struct sta_info *sta;
1597                 struct ieee80211_supported_band *sband;
1598                 u16 ap_ht_cap_flags;
1599
1600                 rcu_read_lock();
1601
1602                 sta = sta_info_get(local, ifmgd->bssid);
1603                 if (!sta) {
1604                         rcu_read_unlock();
1605                         return;
1606                 }
1607
1608                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1609
1610                 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1611                                 elems.ht_cap_elem, &sta->sta.ht_cap);
1612
1613                 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1614
1615                 rcu_read_unlock();
1616
1617                 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1618                                                ap_ht_cap_flags);
1619         }
1620
1621         if (elems.country_elem) {
1622                 /* Note we are only reviewing this on beacons
1623                  * for the BSSID we are associated to */
1624                 regulatory_hint_11d(local->hw.wiphy,
1625                         elems.country_elem, elems.country_elem_len);
1626
1627                 /* TODO: IBSS also needs this */
1628                 if (elems.pwr_constr_elem)
1629                         ieee80211_handle_pwr_constr(sdata,
1630                                 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1631                                 elems.pwr_constr_elem,
1632                                 elems.pwr_constr_elem_len);
1633         }
1634
1635         ieee80211_bss_info_change_notify(sdata, changed);
1636 }
1637
1638 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1639                                           struct sk_buff *skb,
1640                                           struct ieee80211_rx_status *rx_status)
1641 {
1642         struct ieee80211_local *local = sdata->local;
1643         struct ieee80211_mgmt *mgmt;
1644         u16 fc;
1645
1646         if (skb->len < 24)
1647                 return RX_DROP_MONITOR;
1648
1649         mgmt = (struct ieee80211_mgmt *) skb->data;
1650         fc = le16_to_cpu(mgmt->frame_control);
1651
1652         switch (fc & IEEE80211_FCTL_STYPE) {
1653         case IEEE80211_STYPE_PROBE_REQ:
1654         case IEEE80211_STYPE_PROBE_RESP:
1655         case IEEE80211_STYPE_BEACON:
1656                 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1657         case IEEE80211_STYPE_AUTH:
1658         case IEEE80211_STYPE_ASSOC_RESP:
1659         case IEEE80211_STYPE_REASSOC_RESP:
1660         case IEEE80211_STYPE_DEAUTH:
1661         case IEEE80211_STYPE_DISASSOC:
1662                 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1663                 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
1664                 return RX_QUEUED;
1665         }
1666
1667         return RX_DROP_MONITOR;
1668 }
1669
1670 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1671                                          struct sk_buff *skb)
1672 {
1673         struct ieee80211_rx_status *rx_status;
1674         struct ieee80211_mgmt *mgmt;
1675         u16 fc;
1676
1677         rx_status = (struct ieee80211_rx_status *) skb->cb;
1678         mgmt = (struct ieee80211_mgmt *) skb->data;
1679         fc = le16_to_cpu(mgmt->frame_control);
1680
1681         switch (fc & IEEE80211_FCTL_STYPE) {
1682         case IEEE80211_STYPE_PROBE_RESP:
1683                 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
1684                                              rx_status);
1685                 break;
1686         case IEEE80211_STYPE_BEACON:
1687                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1688                                          rx_status);
1689                 break;
1690         case IEEE80211_STYPE_AUTH:
1691                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
1692                 break;
1693         case IEEE80211_STYPE_ASSOC_RESP:
1694                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0);
1695                 break;
1696         case IEEE80211_STYPE_REASSOC_RESP:
1697                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1);
1698                 break;
1699         case IEEE80211_STYPE_DEAUTH:
1700                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1701                 break;
1702         case IEEE80211_STYPE_DISASSOC:
1703                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1704                 break;
1705         }
1706
1707         kfree_skb(skb);
1708 }
1709
1710 static void ieee80211_sta_timer(unsigned long data)
1711 {
1712         struct ieee80211_sub_if_data *sdata =
1713                 (struct ieee80211_sub_if_data *) data;
1714         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1715         struct ieee80211_local *local = sdata->local;
1716
1717         set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1718         queue_work(local->hw.workqueue, &ifmgd->work);
1719 }
1720
1721 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata)
1722 {
1723         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1724         struct ieee80211_local *local = sdata->local;
1725
1726         if (local->ops->reset_tsf) {
1727                 /* Reset own TSF to allow time synchronization work. */
1728                 local->ops->reset_tsf(local_to_hw(local));
1729         }
1730
1731         ifmgd->wmm_last_param_set = -1; /* allow any WMM update */
1732
1733
1734         if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1735                 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1736         else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1737                 ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY;
1738         else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1739                 ifmgd->auth_alg = WLAN_AUTH_LEAP;
1740         else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_FT)
1741                 ifmgd->auth_alg = WLAN_AUTH_FT;
1742         else
1743                 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1744         ifmgd->auth_transaction = -1;
1745         ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
1746         ifmgd->assoc_scan_tries = 0;
1747         ifmgd->direct_probe_tries = 0;
1748         ifmgd->auth_tries = 0;
1749         ifmgd->assoc_tries = 0;
1750         netif_tx_stop_all_queues(sdata->dev);
1751         netif_carrier_off(sdata->dev);
1752 }
1753
1754 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata)
1755 {
1756         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1757         struct ieee80211_local *local = sdata->local;
1758         struct ieee80211_bss *bss;
1759         u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid;
1760         u8 ssid_len = ifmgd->ssid_len;
1761         u16 capa_mask = WLAN_CAPABILITY_ESS;
1762         u16 capa_val = WLAN_CAPABILITY_ESS;
1763         struct ieee80211_channel *chan = local->oper_channel;
1764
1765         if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1766             ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL |
1767                             IEEE80211_STA_AUTO_BSSID_SEL |
1768                             IEEE80211_STA_AUTO_CHANNEL_SEL)) {
1769                 capa_mask |= WLAN_CAPABILITY_PRIVACY;
1770                 if (sdata->default_key)
1771                         capa_val |= WLAN_CAPABILITY_PRIVACY;
1772         }
1773
1774         if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
1775                 chan = NULL;
1776
1777         if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL)
1778                 bssid = NULL;
1779
1780         if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) {
1781                 ssid = NULL;
1782                 ssid_len = 0;
1783         }
1784
1785         bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
1786                                        bssid, ssid, ssid_len,
1787                                        capa_mask, capa_val);
1788
1789         if (bss) {
1790                 ieee80211_set_freq(sdata, bss->cbss.channel->center_freq);
1791                 if (!(ifmgd->flags & IEEE80211_STA_SSID_SET))
1792                         ieee80211_sta_set_ssid(sdata, bss->ssid,
1793                                                bss->ssid_len);
1794                 ieee80211_sta_set_bssid(sdata, bss->cbss.bssid);
1795                 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
1796                                                     bss->supp_rates);
1797                 if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED)
1798                         sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED;
1799                 else
1800                         sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED;
1801
1802                 /* Send out direct probe if no probe resp was received or
1803                  * the one we have is outdated
1804                  */
1805                 if (!bss->last_probe_resp ||
1806                     time_after(jiffies, bss->last_probe_resp
1807                                         + IEEE80211_SCAN_RESULT_EXPIRE))
1808                         ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1809                 else
1810                         ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
1811
1812                 ieee80211_rx_bss_put(local, bss);
1813                 ieee80211_sta_reset_auth(sdata);
1814                 return 0;
1815         } else {
1816                 if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
1817                         ifmgd->assoc_scan_tries++;
1818                         /* XXX maybe racy? */
1819                         if (local->scan_req)
1820                                 return -1;
1821                         memcpy(local->int_scan_req.ssids[0].ssid,
1822                                ifmgd->ssid, IEEE80211_MAX_SSID_LEN);
1823                         if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL)
1824                                 local->int_scan_req.ssids[0].ssid_len = 0;
1825                         else
1826                                 local->int_scan_req.ssids[0].ssid_len = ifmgd->ssid_len;
1827
1828                         if (ieee80211_start_scan(sdata, &local->int_scan_req))
1829                                 ieee80211_scan_failed(local);
1830
1831                         ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
1832                         set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
1833                 } else {
1834                         ifmgd->assoc_scan_tries = 0;
1835                         ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1836                 }
1837         }
1838         return -1;
1839 }
1840
1841
1842 static void ieee80211_sta_work(struct work_struct *work)
1843 {
1844         struct ieee80211_sub_if_data *sdata =
1845                 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
1846         struct ieee80211_local *local = sdata->local;
1847         struct ieee80211_if_managed *ifmgd;
1848         struct sk_buff *skb;
1849
1850         if (!netif_running(sdata->dev))
1851                 return;
1852
1853         if (local->sw_scanning || local->hw_scanning)
1854                 return;
1855
1856         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1857                 return;
1858         ifmgd = &sdata->u.mgd;
1859
1860         while ((skb = skb_dequeue(&ifmgd->skb_queue)))
1861                 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1862
1863         if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
1864             ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE &&
1865             ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE &&
1866             test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) {
1867                 /*
1868                  * The call to ieee80211_start_scan can fail but ieee80211_request_scan
1869                  * (which queued ieee80211_sta_work) did not return an error. Thus, call
1870                  * ieee80211_scan_failed here if ieee80211_start_scan fails in order to
1871                  * notify the scan requester.
1872                  */
1873                 if (ieee80211_start_scan(sdata, local->scan_req))
1874                         ieee80211_scan_failed(local);
1875                 return;
1876         }
1877
1878         if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) {
1879                 if (ieee80211_sta_config_auth(sdata))
1880                         return;
1881                 clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1882         } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request))
1883                 return;
1884
1885         switch (ifmgd->state) {
1886         case IEEE80211_STA_MLME_DISABLED:
1887                 break;
1888         case IEEE80211_STA_MLME_DIRECT_PROBE:
1889                 ieee80211_direct_probe(sdata);
1890                 break;
1891         case IEEE80211_STA_MLME_AUTHENTICATE:
1892                 ieee80211_authenticate(sdata);
1893                 break;
1894         case IEEE80211_STA_MLME_ASSOCIATE:
1895                 ieee80211_associate(sdata);
1896                 break;
1897         case IEEE80211_STA_MLME_ASSOCIATED:
1898                 ieee80211_associated(sdata);
1899                 break;
1900         default:
1901                 WARN_ON(1);
1902                 break;
1903         }
1904
1905         if (ieee80211_privacy_mismatch(sdata)) {
1906                 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
1907                        "mixed-cell disabled - disassociate\n", sdata->dev->name);
1908
1909                 ieee80211_set_disassoc(sdata, false, true,
1910                                         WLAN_REASON_UNSPECIFIED);
1911         }
1912 }
1913
1914 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
1915 {
1916         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
1917                 /*
1918                  * Need to update last_beacon to avoid beacon loss
1919                  * test to trigger.
1920                  */
1921                 sdata->u.mgd.last_beacon = jiffies;
1922
1923
1924                 queue_work(sdata->local->hw.workqueue,
1925                            &sdata->u.mgd.work);
1926         }
1927 }
1928
1929 /* interface setup */
1930 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
1931 {
1932         struct ieee80211_if_managed *ifmgd;
1933
1934         ifmgd = &sdata->u.mgd;
1935         INIT_WORK(&ifmgd->work, ieee80211_sta_work);
1936         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1937         INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
1938         setup_timer(&ifmgd->timer, ieee80211_sta_timer,
1939                     (unsigned long) sdata);
1940         setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
1941                     (unsigned long) sdata);
1942         skb_queue_head_init(&ifmgd->skb_queue);
1943
1944         ifmgd->capab = WLAN_CAPABILITY_ESS;
1945         ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN |
1946                 IEEE80211_AUTH_ALG_SHARED_KEY;
1947         ifmgd->flags |= IEEE80211_STA_CREATE_IBSS |
1948                 IEEE80211_STA_AUTO_BSSID_SEL |
1949                 IEEE80211_STA_AUTO_CHANNEL_SEL;
1950         if (sdata->local->hw.queues >= 4)
1951                 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
1952 }
1953
1954 /* configuration hooks */
1955 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata)
1956 {
1957         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1958         struct ieee80211_local *local = sdata->local;
1959
1960         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1961                 return;
1962
1963         if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET |
1964                              IEEE80211_STA_AUTO_BSSID_SEL)) &&
1965             (ifmgd->flags & (IEEE80211_STA_SSID_SET |
1966                              IEEE80211_STA_AUTO_SSID_SEL))) {
1967
1968                 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)
1969                         ieee80211_set_disassoc(sdata, true, true,
1970                                                WLAN_REASON_DEAUTH_LEAVING);
1971
1972                 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) ||
1973                     ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1974                         set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
1975                 else if (ifmgd->flags & IEEE80211_STA_EXT_SME)
1976                         set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1977                 queue_work(local->hw.workqueue, &ifmgd->work);
1978         }
1979 }
1980
1981 int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata)
1982 {
1983         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1984
1985         if (ifmgd->ssid_len)
1986                 ifmgd->flags |= IEEE80211_STA_SSID_SET;
1987         else
1988                 ifmgd->flags &= ~IEEE80211_STA_SSID_SET;
1989
1990         return 0;
1991 }
1992
1993 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
1994 {
1995         struct ieee80211_if_managed *ifmgd;
1996
1997         if (len > IEEE80211_MAX_SSID_LEN)
1998                 return -EINVAL;
1999
2000         ifmgd = &sdata->u.mgd;
2001
2002         if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) {
2003                 /*
2004                  * Do not use reassociation if SSID is changed (different ESS).
2005                  */
2006                 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2007                 memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid));
2008                 memcpy(ifmgd->ssid, ssid, len);
2009                 ifmgd->ssid_len = len;
2010         }
2011
2012         return ieee80211_sta_commit(sdata);
2013 }
2014
2015 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2016 {
2017         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2018         memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len);
2019         *len = ifmgd->ssid_len;
2020         return 0;
2021 }
2022
2023 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2024 {
2025         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2026
2027         if (is_valid_ether_addr(bssid)) {
2028                 memcpy(ifmgd->bssid, bssid, ETH_ALEN);
2029                 ifmgd->flags |= IEEE80211_STA_BSSID_SET;
2030         } else {
2031                 memset(ifmgd->bssid, 0, ETH_ALEN);
2032                 ifmgd->flags &= ~IEEE80211_STA_BSSID_SET;
2033         }
2034
2035         if (netif_running(sdata->dev)) {
2036                 if (ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID)) {
2037                         printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2038                                "the low-level driver\n", sdata->dev->name);
2039                 }
2040         }
2041
2042         return ieee80211_sta_commit(sdata);
2043 }
2044
2045 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
2046                                const char *ie, size_t len)
2047 {
2048         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2049
2050         kfree(ifmgd->extra_ie);
2051         if (len == 0) {
2052                 ifmgd->extra_ie = NULL;
2053                 ifmgd->extra_ie_len = 0;
2054                 return 0;
2055         }
2056         ifmgd->extra_ie = kmalloc(len, GFP_KERNEL);
2057         if (!ifmgd->extra_ie) {
2058                 ifmgd->extra_ie_len = 0;
2059                 return -ENOMEM;
2060         }
2061         memcpy(ifmgd->extra_ie, ie, len);
2062         ifmgd->extra_ie_len = len;
2063         return 0;
2064 }
2065
2066 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2067 {
2068         printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2069                sdata->dev->name, reason);
2070
2071         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2072                 return -EINVAL;
2073
2074         ieee80211_set_disassoc(sdata, true, true, reason);
2075         return 0;
2076 }
2077
2078 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2079 {
2080         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2081
2082         printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2083                sdata->dev->name, reason);
2084
2085         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2086                 return -EINVAL;
2087
2088         if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED))
2089                 return -ENOLINK;
2090
2091         ieee80211_set_disassoc(sdata, false, true, reason);
2092         return 0;
2093 }
2094
2095 /* scan finished notification */
2096 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2097 {
2098         struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2099
2100         /* Restart STA timers */
2101         rcu_read_lock();
2102         list_for_each_entry_rcu(sdata, &local->interfaces, list)
2103                 ieee80211_restart_sta_timer(sdata);
2104         rcu_read_unlock();
2105 }
2106
2107 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
2108 {
2109         struct ieee80211_local *local =
2110                 container_of(work, struct ieee80211_local,
2111                              dynamic_ps_disable_work);
2112
2113         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2114                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2115                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2116         }
2117
2118         ieee80211_wake_queues_by_reason(&local->hw,
2119                                         IEEE80211_QUEUE_STOP_REASON_PS);
2120 }
2121
2122 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
2123 {
2124         struct ieee80211_local *local =
2125                 container_of(work, struct ieee80211_local,
2126                              dynamic_ps_enable_work);
2127         /* XXX: using scan_sdata is completely broken! */
2128         struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2129
2130         if (local->hw.conf.flags & IEEE80211_CONF_PS)
2131                 return;
2132
2133         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK && sdata)
2134                 ieee80211_send_nullfunc(local, sdata, 1);
2135
2136         local->hw.conf.flags |= IEEE80211_CONF_PS;
2137         ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2138 }
2139
2140 void ieee80211_dynamic_ps_timer(unsigned long data)
2141 {
2142         struct ieee80211_local *local = (void *) data;
2143
2144         queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
2145 }
2146
2147 void ieee80211_send_nullfunc(struct ieee80211_local *local,
2148                              struct ieee80211_sub_if_data *sdata,
2149                              int powersave)
2150 {
2151         struct sk_buff *skb;
2152         struct ieee80211_hdr *nullfunc;
2153         __le16 fc;
2154
2155         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2156                 return;
2157
2158         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
2159         if (!skb) {
2160                 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
2161                        "frame\n", sdata->dev->name);
2162                 return;
2163         }
2164         skb_reserve(skb, local->hw.extra_tx_headroom);
2165
2166         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
2167         memset(nullfunc, 0, 24);
2168         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
2169                          IEEE80211_FCTL_TODS);
2170         if (powersave)
2171                 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
2172         nullfunc->frame_control = fc;
2173         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2174         memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
2175         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
2176
2177         ieee80211_tx_skb(sdata, skb, 0);
2178 }