6d00e3f738c0eb3ae4c58f0602538b33506d0032
[linux-2.6.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 <linux/pm_qos_params.h>
21 #include <linux/crc32.h>
22 #include <net/mac80211.h>
23 #include <asm/unaligned.h>
24
25 #include "ieee80211_i.h"
26 #include "driver-ops.h"
27 #include "rate.h"
28 #include "led.h"
29
30 #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
31 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
32 #define IEEE80211_AUTH_MAX_TRIES 3
33 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
34 #define IEEE80211_ASSOC_MAX_TRIES 3
35 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
36 #define IEEE80211_PROBE_IDLE_TIME (60 * HZ)
37 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
38
39 /* utils */
40 static int ecw2cw(int ecw)
41 {
42         return (1 << ecw) - 1;
43 }
44
45 static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
46 {
47         u8 *end, *pos;
48
49         pos = bss->cbss.information_elements;
50         if (pos == NULL)
51                 return NULL;
52         end = pos + bss->cbss.len_information_elements;
53
54         while (pos + 1 < end) {
55                 if (pos + 2 + pos[1] > end)
56                         break;
57                 if (pos[0] == ie)
58                         return pos;
59                 pos += 2 + pos[1];
60         }
61
62         return NULL;
63 }
64
65 static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
66                                       struct ieee80211_supported_band *sband,
67                                       u32 *rates)
68 {
69         int i, j, count;
70         *rates = 0;
71         count = 0;
72         for (i = 0; i < bss->supp_rates_len; i++) {
73                 int rate = (bss->supp_rates[i] & 0x7F) * 5;
74
75                 for (j = 0; j < sband->n_bitrates; j++)
76                         if (sband->bitrates[j].bitrate == rate) {
77                                 *rates |= BIT(j);
78                                 count++;
79                                 break;
80                         }
81         }
82
83         return count;
84 }
85
86 /*
87  * ieee80211_enable_ht should be called only after the operating band
88  * has been determined as ht configuration depends on the hw's
89  * HT abilities for a specific band.
90  */
91 static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
92                                struct ieee80211_ht_info *hti,
93                                u16 ap_ht_cap_flags)
94 {
95         struct ieee80211_local *local = sdata->local;
96         struct ieee80211_supported_band *sband;
97         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
98         struct sta_info *sta;
99         u32 changed = 0;
100         u16 ht_opmode;
101         bool enable_ht = true, ht_changed;
102         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
103
104         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
105
106         /* HT is not supported */
107         if (!sband->ht_cap.ht_supported)
108                 enable_ht = false;
109
110         /* check that channel matches the right operating channel */
111         if (local->hw.conf.channel->center_freq !=
112             ieee80211_channel_to_frequency(hti->control_chan))
113                 enable_ht = false;
114
115         if (enable_ht) {
116                 channel_type = NL80211_CHAN_HT20;
117
118                 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
119                     (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
120                     (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
121                         switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
122                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
123                                 channel_type = NL80211_CHAN_HT40PLUS;
124                                 break;
125                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
126                                 channel_type = NL80211_CHAN_HT40MINUS;
127                                 break;
128                         }
129                 }
130         }
131
132         ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
133                      channel_type != local->hw.conf.channel_type;
134
135         local->oper_channel_type = channel_type;
136
137         if (ht_changed) {
138                 /* channel_type change automatically detected */
139                 ieee80211_hw_config(local, 0);
140
141                 rcu_read_lock();
142
143                 sta = sta_info_get(local, ifmgd->bssid);
144                 if (sta)
145                         rate_control_rate_update(local, sband, sta,
146                                                  IEEE80211_RC_HT_CHANGED);
147
148                 rcu_read_unlock();
149         }
150
151         /* disable HT */
152         if (!enable_ht)
153                 return 0;
154
155         ht_opmode = le16_to_cpu(hti->operation_mode);
156
157         /* if bss configuration changed store the new one */
158         if (!sdata->ht_opmode_valid ||
159             sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
160                 changed |= BSS_CHANGED_HT;
161                 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
162                 sdata->ht_opmode_valid = true;
163         }
164
165         return changed;
166 }
167
168 /* frame sending functions */
169
170 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
171 {
172         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
173         struct ieee80211_local *local = sdata->local;
174         struct sk_buff *skb;
175         struct ieee80211_mgmt *mgmt;
176         u8 *pos, *ies, *ht_ie;
177         int i, len, count, rates_len, supp_rates_len;
178         u16 capab;
179         struct ieee80211_bss *bss;
180         int wmm = 0;
181         struct ieee80211_supported_band *sband;
182         u32 rates = 0;
183
184         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
185                             sizeof(*mgmt) + 200 + ifmgd->extra_ie_len +
186                             ifmgd->ssid_len);
187         if (!skb) {
188                 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
189                        "frame\n", sdata->dev->name);
190                 return;
191         }
192         skb_reserve(skb, local->hw.extra_tx_headroom);
193
194         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
195
196         capab = ifmgd->capab;
197
198         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
199                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
200                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
201                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
202                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
203         }
204
205         bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
206                                    local->hw.conf.channel->center_freq,
207                                    ifmgd->ssid, ifmgd->ssid_len);
208         if (bss) {
209                 if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
210                         capab |= WLAN_CAPABILITY_PRIVACY;
211                 if (bss->wmm_used)
212                         wmm = 1;
213
214                 /* get all rates supported by the device and the AP as
215                  * some APs don't like getting a superset of their rates
216                  * in the association request (e.g. D-Link DAP 1353 in
217                  * b-only mode) */
218                 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
219
220                 if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
221                     (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
222                         capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
223
224                 ieee80211_rx_bss_put(local, bss);
225         } else {
226                 rates = ~0;
227                 rates_len = sband->n_bitrates;
228         }
229
230         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
231         memset(mgmt, 0, 24);
232         memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
233         memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
234         memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
235
236         if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) {
237                 skb_put(skb, 10);
238                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
239                                                   IEEE80211_STYPE_REASSOC_REQ);
240                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
241                 mgmt->u.reassoc_req.listen_interval =
242                                 cpu_to_le16(local->hw.conf.listen_interval);
243                 memcpy(mgmt->u.reassoc_req.current_ap, ifmgd->prev_bssid,
244                        ETH_ALEN);
245         } else {
246                 skb_put(skb, 4);
247                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
248                                                   IEEE80211_STYPE_ASSOC_REQ);
249                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
250                 mgmt->u.assoc_req.listen_interval =
251                                 cpu_to_le16(local->hw.conf.listen_interval);
252         }
253
254         /* SSID */
255         ies = pos = skb_put(skb, 2 + ifmgd->ssid_len);
256         *pos++ = WLAN_EID_SSID;
257         *pos++ = ifmgd->ssid_len;
258         memcpy(pos, ifmgd->ssid, ifmgd->ssid_len);
259
260         /* add all rates which were marked to be used above */
261         supp_rates_len = rates_len;
262         if (supp_rates_len > 8)
263                 supp_rates_len = 8;
264
265         len = sband->n_bitrates;
266         pos = skb_put(skb, supp_rates_len + 2);
267         *pos++ = WLAN_EID_SUPP_RATES;
268         *pos++ = supp_rates_len;
269
270         count = 0;
271         for (i = 0; i < sband->n_bitrates; i++) {
272                 if (BIT(i) & rates) {
273                         int rate = sband->bitrates[i].bitrate;
274                         *pos++ = (u8) (rate / 5);
275                         if (++count == 8)
276                                 break;
277                 }
278         }
279
280         if (rates_len > count) {
281                 pos = skb_put(skb, rates_len - count + 2);
282                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
283                 *pos++ = rates_len - count;
284
285                 for (i++; i < sband->n_bitrates; i++) {
286                         if (BIT(i) & rates) {
287                                 int rate = sband->bitrates[i].bitrate;
288                                 *pos++ = (u8) (rate / 5);
289                         }
290                 }
291         }
292
293         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
294                 /* 1. power capabilities */
295                 pos = skb_put(skb, 4);
296                 *pos++ = WLAN_EID_PWR_CAPABILITY;
297                 *pos++ = 2;
298                 *pos++ = 0; /* min tx power */
299                 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
300
301                 /* 2. supported channels */
302                 /* TODO: get this in reg domain format */
303                 pos = skb_put(skb, 2 * sband->n_channels + 2);
304                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
305                 *pos++ = 2 * sband->n_channels;
306                 for (i = 0; i < sband->n_channels; i++) {
307                         *pos++ = ieee80211_frequency_to_channel(
308                                         sband->channels[i].center_freq);
309                         *pos++ = 1; /* one channel in the subband*/
310                 }
311         }
312
313         if (ifmgd->extra_ie) {
314                 pos = skb_put(skb, ifmgd->extra_ie_len);
315                 memcpy(pos, ifmgd->extra_ie, ifmgd->extra_ie_len);
316         }
317
318         if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
319                 pos = skb_put(skb, 9);
320                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
321                 *pos++ = 7; /* len */
322                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
323                 *pos++ = 0x50;
324                 *pos++ = 0xf2;
325                 *pos++ = 2; /* WME */
326                 *pos++ = 0; /* WME info */
327                 *pos++ = 1; /* WME ver */
328                 *pos++ = 0;
329         }
330
331         /* wmm support is a must to HT */
332         /*
333          * IEEE802.11n does not allow TKIP/WEP as pairwise
334          * ciphers in HT mode. We still associate in non-ht
335          * mode (11a/b/g) if any one of these ciphers is
336          * configured as pairwise.
337          */
338         if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
339             sband->ht_cap.ht_supported &&
340             (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) &&
341             ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
342             (!(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))) {
343                 struct ieee80211_ht_info *ht_info =
344                         (struct ieee80211_ht_info *)(ht_ie + 2);
345                 u16 cap = sband->ht_cap.cap;
346                 __le16 tmp;
347                 u32 flags = local->hw.conf.channel->flags;
348
349                 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
350                 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
351                         if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
352                                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
353                                 cap &= ~IEEE80211_HT_CAP_SGI_40;
354                         }
355                         break;
356                 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
357                         if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
358                                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
359                                 cap &= ~IEEE80211_HT_CAP_SGI_40;
360                         }
361                         break;
362                 }
363
364                 tmp = cpu_to_le16(cap);
365                 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
366                 *pos++ = WLAN_EID_HT_CAPABILITY;
367                 *pos++ = sizeof(struct ieee80211_ht_cap);
368                 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
369                 memcpy(pos, &tmp, sizeof(u16));
370                 pos += sizeof(u16);
371                 /* TODO: needs a define here for << 2 */
372                 *pos++ = sband->ht_cap.ampdu_factor |
373                          (sband->ht_cap.ampdu_density << 2);
374                 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
375         }
376
377         kfree(ifmgd->assocreq_ies);
378         ifmgd->assocreq_ies_len = (skb->data + skb->len) - ies;
379         ifmgd->assocreq_ies = kmalloc(ifmgd->assocreq_ies_len, GFP_KERNEL);
380         if (ifmgd->assocreq_ies)
381                 memcpy(ifmgd->assocreq_ies, ies, ifmgd->assocreq_ies_len);
382
383         ieee80211_tx_skb(sdata, skb, 0);
384 }
385
386
387 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
388                                            u16 stype, u16 reason)
389 {
390         struct ieee80211_local *local = sdata->local;
391         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
392         struct sk_buff *skb;
393         struct ieee80211_mgmt *mgmt;
394
395         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
396         if (!skb) {
397                 printk(KERN_DEBUG "%s: failed to allocate buffer for "
398                        "deauth/disassoc frame\n", sdata->dev->name);
399                 return;
400         }
401         skb_reserve(skb, local->hw.extra_tx_headroom);
402
403         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
404         memset(mgmt, 0, 24);
405         memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
406         memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
407         memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
408         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
409         skb_put(skb, 2);
410         /* u.deauth.reason_code == u.disassoc.reason_code */
411         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
412
413         if (stype == IEEE80211_STYPE_DEAUTH)
414                 cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, skb->len);
415         else
416                 cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, skb->len);
417         ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
418 }
419
420 void ieee80211_send_pspoll(struct ieee80211_local *local,
421                            struct ieee80211_sub_if_data *sdata)
422 {
423         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
424         struct ieee80211_pspoll *pspoll;
425         struct sk_buff *skb;
426         u16 fc;
427
428         skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
429         if (!skb) {
430                 printk(KERN_DEBUG "%s: failed to allocate buffer for "
431                        "pspoll frame\n", sdata->dev->name);
432                 return;
433         }
434         skb_reserve(skb, local->hw.extra_tx_headroom);
435
436         pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
437         memset(pspoll, 0, sizeof(*pspoll));
438         fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
439         pspoll->frame_control = cpu_to_le16(fc);
440         pspoll->aid = cpu_to_le16(ifmgd->aid);
441
442         /* aid in PS-Poll has its two MSBs each set to 1 */
443         pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
444
445         memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
446         memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
447
448         ieee80211_tx_skb(sdata, skb, 0);
449 }
450
451 void ieee80211_send_nullfunc(struct ieee80211_local *local,
452                              struct ieee80211_sub_if_data *sdata,
453                              int powersave)
454 {
455         struct sk_buff *skb;
456         struct ieee80211_hdr *nullfunc;
457         __le16 fc;
458
459         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
460                 return;
461
462         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
463         if (!skb) {
464                 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
465                        "frame\n", sdata->dev->name);
466                 return;
467         }
468         skb_reserve(skb, local->hw.extra_tx_headroom);
469
470         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
471         memset(nullfunc, 0, 24);
472         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
473                          IEEE80211_FCTL_TODS);
474         if (powersave)
475                 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
476         nullfunc->frame_control = fc;
477         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
478         memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
479         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
480
481         ieee80211_tx_skb(sdata, skb, 0);
482 }
483
484 /* powersave */
485 static void ieee80211_enable_ps(struct ieee80211_local *local,
486                                 struct ieee80211_sub_if_data *sdata)
487 {
488         struct ieee80211_conf *conf = &local->hw.conf;
489
490         /*
491          * If we are scanning right now then the parameters will
492          * take effect when scan finishes.
493          */
494         if (local->hw_scanning || local->sw_scanning)
495                 return;
496
497         if (conf->dynamic_ps_timeout > 0 &&
498             !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
499                 mod_timer(&local->dynamic_ps_timer, jiffies +
500                           msecs_to_jiffies(conf->dynamic_ps_timeout));
501         } else {
502                 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
503                         ieee80211_send_nullfunc(local, sdata, 1);
504                 conf->flags |= IEEE80211_CONF_PS;
505                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
506         }
507 }
508
509 static void ieee80211_change_ps(struct ieee80211_local *local)
510 {
511         struct ieee80211_conf *conf = &local->hw.conf;
512
513         if (local->ps_sdata) {
514                 if (!(local->ps_sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED))
515                         return;
516
517                 ieee80211_enable_ps(local, local->ps_sdata);
518         } else if (conf->flags & IEEE80211_CONF_PS) {
519                 conf->flags &= ~IEEE80211_CONF_PS;
520                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
521                 del_timer_sync(&local->dynamic_ps_timer);
522                 cancel_work_sync(&local->dynamic_ps_enable_work);
523         }
524 }
525
526 /* need to hold RTNL or interface lock */
527 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
528 {
529         struct ieee80211_sub_if_data *sdata, *found = NULL;
530         int count = 0;
531
532         if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
533                 local->ps_sdata = NULL;
534                 return;
535         }
536
537         list_for_each_entry(sdata, &local->interfaces, list) {
538                 if (!netif_running(sdata->dev))
539                         continue;
540                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
541                         continue;
542                 found = sdata;
543                 count++;
544         }
545
546         if (count == 1 && found->u.mgd.powersave) {
547                 s32 beaconint_us;
548
549                 if (latency < 0)
550                         latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
551
552                 beaconint_us = ieee80211_tu_to_usec(
553                                         found->vif.bss_conf.beacon_int);
554
555                 if (beaconint_us > latency) {
556                         local->ps_sdata = NULL;
557                 } else {
558                         u8 dtimper = found->vif.bss_conf.dtim_period;
559                         int maxslp = 1;
560
561                         if (dtimper > 1)
562                                 maxslp = min_t(int, dtimper,
563                                                     latency / beaconint_us);
564
565                         local->hw.conf.max_sleep_period = maxslp;
566                         local->ps_sdata = found;
567                 }
568         } else {
569                 local->ps_sdata = NULL;
570         }
571
572         ieee80211_change_ps(local);
573 }
574
575 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
576 {
577         struct ieee80211_local *local =
578                 container_of(work, struct ieee80211_local,
579                              dynamic_ps_disable_work);
580
581         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
582                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
583                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
584         }
585
586         ieee80211_wake_queues_by_reason(&local->hw,
587                                         IEEE80211_QUEUE_STOP_REASON_PS);
588 }
589
590 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
591 {
592         struct ieee80211_local *local =
593                 container_of(work, struct ieee80211_local,
594                              dynamic_ps_enable_work);
595         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
596
597         /* can only happen when PS was just disabled anyway */
598         if (!sdata)
599                 return;
600
601         if (local->hw.conf.flags & IEEE80211_CONF_PS)
602                 return;
603
604         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
605                 ieee80211_send_nullfunc(local, sdata, 1);
606
607         local->hw.conf.flags |= IEEE80211_CONF_PS;
608         ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
609 }
610
611 void ieee80211_dynamic_ps_timer(unsigned long data)
612 {
613         struct ieee80211_local *local = (void *) data;
614
615         queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
616 }
617
618 /* MLME */
619 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
620                                      struct ieee80211_if_managed *ifmgd,
621                                      u8 *wmm_param, size_t wmm_param_len)
622 {
623         struct ieee80211_tx_queue_params params;
624         size_t left;
625         int count;
626         u8 *pos;
627
628         if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
629                 return;
630
631         if (!wmm_param)
632                 return;
633
634         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
635                 return;
636         count = wmm_param[6] & 0x0f;
637         if (count == ifmgd->wmm_last_param_set)
638                 return;
639         ifmgd->wmm_last_param_set = count;
640
641         pos = wmm_param + 8;
642         left = wmm_param_len - 8;
643
644         memset(&params, 0, sizeof(params));
645
646         local->wmm_acm = 0;
647         for (; left >= 4; left -= 4, pos += 4) {
648                 int aci = (pos[0] >> 5) & 0x03;
649                 int acm = (pos[0] >> 4) & 0x01;
650                 int queue;
651
652                 switch (aci) {
653                 case 1: /* AC_BK */
654                         queue = 3;
655                         if (acm)
656                                 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
657                         break;
658                 case 2: /* AC_VI */
659                         queue = 1;
660                         if (acm)
661                                 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
662                         break;
663                 case 3: /* AC_VO */
664                         queue = 0;
665                         if (acm)
666                                 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
667                         break;
668                 case 0: /* AC_BE */
669                 default:
670                         queue = 2;
671                         if (acm)
672                                 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
673                         break;
674                 }
675
676                 params.aifs = pos[0] & 0x0f;
677                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
678                 params.cw_min = ecw2cw(pos[1] & 0x0f);
679                 params.txop = get_unaligned_le16(pos + 2);
680 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
681                 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
682                        "cWmin=%d cWmax=%d txop=%d\n",
683                        local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
684                        params.cw_max, params.txop);
685 #endif
686                 if (drv_conf_tx(local, queue, &params) && local->ops->conf_tx)
687                         printk(KERN_DEBUG "%s: failed to set TX queue "
688                                "parameters for queue %d\n", local->mdev->name,
689                                queue);
690         }
691 }
692
693 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
694                                            u16 capab, bool erp_valid, u8 erp)
695 {
696         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
697 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
698         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
699 #endif
700         u32 changed = 0;
701         bool use_protection;
702         bool use_short_preamble;
703         bool use_short_slot;
704
705         if (erp_valid) {
706                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
707                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
708         } else {
709                 use_protection = false;
710                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
711         }
712
713         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
714
715         if (use_protection != bss_conf->use_cts_prot) {
716 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
717                 if (net_ratelimit()) {
718                         printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
719                                sdata->dev->name,
720                                use_protection ? "enabled" : "disabled",
721                                ifmgd->bssid);
722                 }
723 #endif
724                 bss_conf->use_cts_prot = use_protection;
725                 changed |= BSS_CHANGED_ERP_CTS_PROT;
726         }
727
728         if (use_short_preamble != bss_conf->use_short_preamble) {
729 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
730                 if (net_ratelimit()) {
731                         printk(KERN_DEBUG "%s: switched to %s barker preamble"
732                                " (BSSID=%pM)\n",
733                                sdata->dev->name,
734                                use_short_preamble ? "short" : "long",
735                                ifmgd->bssid);
736                 }
737 #endif
738                 bss_conf->use_short_preamble = use_short_preamble;
739                 changed |= BSS_CHANGED_ERP_PREAMBLE;
740         }
741
742         if (use_short_slot != bss_conf->use_short_slot) {
743 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
744                 if (net_ratelimit()) {
745                         printk(KERN_DEBUG "%s: switched to %s slot time"
746                                " (BSSID=%pM)\n",
747                                sdata->dev->name,
748                                use_short_slot ? "short" : "long",
749                                ifmgd->bssid);
750                 }
751 #endif
752                 bss_conf->use_short_slot = use_short_slot;
753                 changed |= BSS_CHANGED_ERP_SLOT;
754         }
755
756         return changed;
757 }
758
759 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata)
760 {
761         union iwreq_data wrqu;
762
763         memset(&wrqu, 0, sizeof(wrqu));
764         if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED)
765                 memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN);
766         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
767         wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
768 }
769
770 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata)
771 {
772         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
773         char *buf;
774         size_t len;
775         int i;
776         union iwreq_data wrqu;
777
778         if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies)
779                 return;
780
781         buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len +
782                                 ifmgd->assocresp_ies_len), GFP_KERNEL);
783         if (!buf)
784                 return;
785
786         len = sprintf(buf, "ASSOCINFO(");
787         if (ifmgd->assocreq_ies) {
788                 len += sprintf(buf + len, "ReqIEs=");
789                 for (i = 0; i < ifmgd->assocreq_ies_len; i++) {
790                         len += sprintf(buf + len, "%02x",
791                                        ifmgd->assocreq_ies[i]);
792                 }
793         }
794         if (ifmgd->assocresp_ies) {
795                 if (ifmgd->assocreq_ies)
796                         len += sprintf(buf + len, " ");
797                 len += sprintf(buf + len, "RespIEs=");
798                 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
799                         len += sprintf(buf + len, "%02x",
800                                        ifmgd->assocresp_ies[i]);
801                 }
802         }
803         len += sprintf(buf + len, ")");
804
805         if (len > IW_CUSTOM_MAX) {
806                 len = sprintf(buf, "ASSOCRESPIE=");
807                 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
808                         len += sprintf(buf + len, "%02x",
809                                        ifmgd->assocresp_ies[i]);
810                 }
811         }
812
813         if (len <= IW_CUSTOM_MAX) {
814                 memset(&wrqu, 0, sizeof(wrqu));
815                 wrqu.data.length = len;
816                 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
817         }
818
819         kfree(buf);
820 }
821
822
823 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
824                                      u32 bss_info_changed)
825 {
826         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
827         struct ieee80211_local *local = sdata->local;
828         struct ieee80211_conf *conf = &local_to_hw(local)->conf;
829
830         struct ieee80211_bss *bss;
831
832         bss_info_changed |= BSS_CHANGED_ASSOC;
833         ifmgd->flags |= IEEE80211_STA_ASSOCIATED;
834
835         bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
836                                    conf->channel->center_freq,
837                                    ifmgd->ssid, ifmgd->ssid_len);
838         if (bss) {
839                 /* set timing information */
840                 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
841                 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
842                 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
843
844                 bss_info_changed |= BSS_CHANGED_BEACON_INT;
845                 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
846                         bss->cbss.capability, bss->has_erp_value, bss->erp_value);
847
848                 cfg80211_hold_bss(&bss->cbss);
849
850                 ieee80211_rx_bss_put(local, bss);
851         }
852
853         ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET;
854         memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN);
855         ieee80211_sta_send_associnfo(sdata);
856
857         ifmgd->last_probe = jiffies;
858         ieee80211_led_assoc(local, 1);
859
860         sdata->vif.bss_conf.assoc = 1;
861         /*
862          * For now just always ask the driver to update the basic rateset
863          * when we have associated, we aren't checking whether it actually
864          * changed or not.
865          */
866         bss_info_changed |= BSS_CHANGED_BASIC_RATES;
867         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
868
869         /* will be same as sdata */
870         if (local->ps_sdata) {
871                 mutex_lock(&local->iflist_mtx);
872                 ieee80211_recalc_ps(local, -1);
873                 mutex_unlock(&local->iflist_mtx);
874         }
875
876         netif_tx_start_all_queues(sdata->dev);
877         netif_carrier_on(sdata->dev);
878
879         ieee80211_sta_send_apinfo(sdata);
880 }
881
882 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata)
883 {
884         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
885         struct ieee80211_local *local = sdata->local;
886
887         ifmgd->direct_probe_tries++;
888         if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
889                 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
890                        sdata->dev->name, ifmgd->bssid);
891                 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
892                 ieee80211_recalc_idle(local);
893                 cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid);
894
895                 /*
896                  * Most likely AP is not in the range so remove the
897                  * bss information associated to the AP
898                  */
899                 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
900                                 sdata->local->hw.conf.channel->center_freq,
901                                 ifmgd->ssid, ifmgd->ssid_len);
902
903                 /*
904                  * We might have a pending scan which had no chance to run yet
905                  * due to state == IEEE80211_STA_MLME_DIRECT_PROBE.
906                  * Hence, queue the STAs work again
907                  */
908                 queue_work(local->hw.workqueue, &ifmgd->work);
909                 return;
910         }
911
912         printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
913                         sdata->dev->name, ifmgd->bssid,
914                         ifmgd->direct_probe_tries);
915
916         ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
917
918         /* Direct probe is sent to broadcast address as some APs
919          * will not answer to direct packet in unassociated state.
920          */
921         ieee80211_send_probe_req(sdata, NULL,
922                                  ifmgd->ssid, ifmgd->ssid_len, NULL, 0);
923
924         mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
925 }
926
927
928 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata)
929 {
930         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
931         struct ieee80211_local *local = sdata->local;
932         u8 *ies;
933         size_t ies_len;
934
935         ifmgd->auth_tries++;
936         if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
937                 printk(KERN_DEBUG "%s: authentication with AP %pM"
938                        " timed out\n",
939                        sdata->dev->name, ifmgd->bssid);
940                 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
941                 ieee80211_recalc_idle(local);
942                 cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid);
943                 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
944                                 sdata->local->hw.conf.channel->center_freq,
945                                 ifmgd->ssid, ifmgd->ssid_len);
946
947                 /*
948                  * We might have a pending scan which had no chance to run yet
949                  * due to state == IEEE80211_STA_MLME_AUTHENTICATE.
950                  * Hence, queue the STAs work again
951                  */
952                 queue_work(local->hw.workqueue, &ifmgd->work);
953                 return;
954         }
955
956         ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
957         printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
958                sdata->dev->name, ifmgd->bssid);
959
960         if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
961                 ies = ifmgd->sme_auth_ie;
962                 ies_len = ifmgd->sme_auth_ie_len;
963         } else {
964                 ies = NULL;
965                 ies_len = 0;
966         }
967         ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ies, ies_len,
968                             ifmgd->bssid, 0);
969         ifmgd->auth_transaction = 2;
970
971         mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
972 }
973
974 /*
975  * The disassoc 'reason' argument can be either our own reason
976  * if self disconnected or a reason code from the AP.
977  */
978 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
979                                    bool deauth, bool self_disconnected,
980                                    u16 reason)
981 {
982         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
983         struct ieee80211_local *local = sdata->local;
984         struct ieee80211_conf *conf = &local_to_hw(local)->conf;
985         struct ieee80211_bss *bss;
986         struct sta_info *sta;
987         u32 changed = 0, config_changed = 0;
988
989         rcu_read_lock();
990
991         sta = sta_info_get(local, ifmgd->bssid);
992         if (!sta) {
993                 rcu_read_unlock();
994                 return;
995         }
996
997         if (deauth) {
998                 ifmgd->direct_probe_tries = 0;
999                 ifmgd->auth_tries = 0;
1000         }
1001         ifmgd->assoc_scan_tries = 0;
1002         ifmgd->assoc_tries = 0;
1003
1004         netif_tx_stop_all_queues(sdata->dev);
1005         netif_carrier_off(sdata->dev);
1006
1007         ieee80211_sta_tear_down_BA_sessions(sta);
1008
1009         bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
1010                                    conf->channel->center_freq,
1011                                    ifmgd->ssid, ifmgd->ssid_len);
1012
1013         if (bss) {
1014                 cfg80211_unhold_bss(&bss->cbss);
1015                 ieee80211_rx_bss_put(local, bss);
1016         }
1017
1018         if (self_disconnected) {
1019                 if (deauth)
1020                         ieee80211_send_deauth_disassoc(sdata,
1021                                 IEEE80211_STYPE_DEAUTH, reason);
1022                 else
1023                         ieee80211_send_deauth_disassoc(sdata,
1024                                 IEEE80211_STYPE_DISASSOC, reason);
1025         }
1026
1027         ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
1028         changed |= ieee80211_reset_erp_info(sdata);
1029
1030         ieee80211_led_assoc(local, 0);
1031         changed |= BSS_CHANGED_ASSOC;
1032         sdata->vif.bss_conf.assoc = false;
1033
1034         ieee80211_sta_send_apinfo(sdata);
1035
1036         if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
1037                 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1038                 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1039                                 sdata->local->hw.conf.channel->center_freq,
1040                                 ifmgd->ssid, ifmgd->ssid_len);
1041         }
1042
1043         rcu_read_unlock();
1044
1045         ieee80211_set_wmm_default(sdata);
1046
1047         ieee80211_recalc_idle(local);
1048
1049         /* channel(_type) changes are handled by ieee80211_hw_config */
1050         local->oper_channel_type = NL80211_CHAN_NO_HT;
1051
1052         /* on the next assoc, re-program HT parameters */
1053         sdata->ht_opmode_valid = false;
1054
1055         local->power_constr_level = 0;
1056
1057         del_timer_sync(&local->dynamic_ps_timer);
1058         cancel_work_sync(&local->dynamic_ps_enable_work);
1059
1060         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1061                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1062                 config_changed |= IEEE80211_CONF_CHANGE_PS;
1063         }
1064
1065         ieee80211_hw_config(local, config_changed);
1066         ieee80211_bss_info_change_notify(sdata, changed);
1067
1068         rcu_read_lock();
1069
1070         sta = sta_info_get(local, ifmgd->bssid);
1071         if (!sta) {
1072                 rcu_read_unlock();
1073                 return;
1074         }
1075
1076         sta_info_unlink(&sta);
1077
1078         rcu_read_unlock();
1079
1080         sta_info_destroy(sta);
1081 }
1082
1083 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
1084 {
1085         if (!sdata || !sdata->default_key ||
1086             sdata->default_key->conf.alg != ALG_WEP)
1087                 return 0;
1088         return 1;
1089 }
1090
1091 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata)
1092 {
1093         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1094         struct ieee80211_local *local = sdata->local;
1095         struct ieee80211_bss *bss;
1096         int bss_privacy;
1097         int wep_privacy;
1098         int privacy_invoked;
1099
1100         if (!ifmgd || (ifmgd->flags & IEEE80211_STA_EXT_SME))
1101                 return 0;
1102
1103         bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
1104                                    local->hw.conf.channel->center_freq,
1105                                    ifmgd->ssid, ifmgd->ssid_len);
1106         if (!bss)
1107                 return 0;
1108
1109         bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY);
1110         wep_privacy = !!ieee80211_sta_wep_configured(sdata);
1111         privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED);
1112
1113         ieee80211_rx_bss_put(local, bss);
1114
1115         if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
1116                 return 0;
1117
1118         return 1;
1119 }
1120
1121 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata)
1122 {
1123         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1124         struct ieee80211_local *local = sdata->local;
1125
1126         ifmgd->assoc_tries++;
1127         if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
1128                 printk(KERN_DEBUG "%s: association with AP %pM"
1129                        " timed out\n",
1130                        sdata->dev->name, ifmgd->bssid);
1131                 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1132                 ieee80211_recalc_idle(local);
1133                 cfg80211_send_assoc_timeout(sdata->dev, ifmgd->bssid);
1134                 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1135                                 sdata->local->hw.conf.channel->center_freq,
1136                                 ifmgd->ssid, ifmgd->ssid_len);
1137                 /*
1138                  * We might have a pending scan which had no chance to run yet
1139                  * due to state == IEEE80211_STA_MLME_ASSOCIATE.
1140                  * Hence, queue the STAs work again
1141                  */
1142                 queue_work(local->hw.workqueue, &ifmgd->work);
1143                 return;
1144         }
1145
1146         ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1147         printk(KERN_DEBUG "%s: associate with AP %pM\n",
1148                sdata->dev->name, ifmgd->bssid);
1149         if (ieee80211_privacy_mismatch(sdata)) {
1150                 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
1151                        "mixed-cell disabled - abort association\n", sdata->dev->name);
1152                 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1153                 ieee80211_recalc_idle(local);
1154                 return;
1155         }
1156
1157         ieee80211_send_assoc(sdata);
1158
1159         mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1160 }
1161
1162 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1163                              struct ieee80211_hdr *hdr)
1164 {
1165         /*
1166          * We can postpone the mgd.timer whenever receiving unicast frames
1167          * from AP because we know that the connection is working both ways
1168          * at that time. But multicast frames (and hence also beacons) must
1169          * be ignored here, because we need to trigger the timer during
1170          * data idle periods for sending the periodical probe request to
1171          * the AP.
1172          */
1173         if (!is_multicast_ether_addr(hdr->addr1))
1174                 mod_timer(&sdata->u.mgd.timer,
1175                           jiffies + IEEE80211_MONITORING_INTERVAL);
1176 }
1177
1178 void ieee80211_beacon_loss_work(struct work_struct *work)
1179 {
1180         struct ieee80211_sub_if_data *sdata =
1181                 container_of(work, struct ieee80211_sub_if_data,
1182                              u.mgd.beacon_loss_work);
1183         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1184
1185 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1186         if (net_ratelimit()) {
1187                 printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM "
1188                        "- sending probe request\n", sdata->dev->name,
1189                        sdata->u.mgd.bssid);
1190         }
1191 #endif
1192
1193         ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1194         ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1195                                  ifmgd->ssid_len, NULL, 0);
1196
1197         mod_timer(&ifmgd->timer, jiffies + IEEE80211_MONITORING_INTERVAL);
1198 }
1199
1200 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1201 {
1202         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1203
1204         queue_work(sdata->local->hw.workqueue,
1205                    &sdata->u.mgd.beacon_loss_work);
1206 }
1207 EXPORT_SYMBOL(ieee80211_beacon_loss);
1208
1209 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
1210 {
1211         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1212         struct ieee80211_local *local = sdata->local;
1213         struct sta_info *sta;
1214         bool disassoc = false;
1215
1216         /* TODO: start monitoring current AP signal quality and number of
1217          * missed beacons. Scan other channels every now and then and search
1218          * for better APs. */
1219         /* TODO: remove expired BSSes */
1220
1221         ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED;
1222
1223         rcu_read_lock();
1224
1225         sta = sta_info_get(local, ifmgd->bssid);
1226         if (!sta) {
1227                 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
1228                        sdata->dev->name, ifmgd->bssid);
1229                 disassoc = true;
1230                 goto unlock;
1231         }
1232
1233         if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) &&
1234             time_after(jiffies, sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
1235                 printk(KERN_DEBUG "%s: no probe response from AP %pM "
1236                        "- disassociating\n",
1237                        sdata->dev->name, ifmgd->bssid);
1238                 disassoc = true;
1239                 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1240                 goto unlock;
1241         }
1242
1243         /*
1244          * Beacon filtering is only enabled with power save and then the
1245          * stack should not check for beacon loss.
1246          */
1247         if (!((local->hw.flags & IEEE80211_HW_BEACON_FILTER) &&
1248               (local->hw.conf.flags & IEEE80211_CONF_PS)) &&
1249             time_after(jiffies,
1250                        ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) {
1251 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1252                 if (net_ratelimit()) {
1253                         printk(KERN_DEBUG "%s: beacon loss from AP %pM "
1254                                "- sending probe request\n",
1255                                sdata->dev->name, ifmgd->bssid);
1256                 }
1257 #endif
1258                 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1259                 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1260                                          ifmgd->ssid_len, NULL, 0);
1261                 goto unlock;
1262
1263         }
1264
1265         if (time_after(jiffies, sta->last_rx + IEEE80211_PROBE_IDLE_TIME)) {
1266                 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1267                 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1268                                          ifmgd->ssid_len, NULL, 0);
1269         }
1270
1271  unlock:
1272         rcu_read_unlock();
1273
1274         if (disassoc)
1275                 ieee80211_set_disassoc(sdata, true, true,
1276                                         WLAN_REASON_PREV_AUTH_NOT_VALID);
1277         else
1278                 mod_timer(&ifmgd->timer, jiffies +
1279                                       IEEE80211_MONITORING_INTERVAL);
1280 }
1281
1282
1283 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata)
1284 {
1285         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1286
1287         printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1288         ifmgd->flags |= IEEE80211_STA_AUTHENTICATED;
1289         if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1290                 /* Wait for SME to request association */
1291                 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1292                 ieee80211_recalc_idle(sdata->local);
1293         } else
1294                 ieee80211_associate(sdata);
1295 }
1296
1297
1298 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1299                                      struct ieee80211_mgmt *mgmt,
1300                                      size_t len)
1301 {
1302         u8 *pos;
1303         struct ieee802_11_elems elems;
1304
1305         pos = mgmt->u.auth.variable;
1306         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1307         if (!elems.challenge)
1308                 return;
1309         ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg,
1310                             elems.challenge - 2, elems.challenge_len + 2,
1311                             sdata->u.mgd.bssid, 1);
1312         sdata->u.mgd.auth_transaction = 4;
1313 }
1314
1315 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1316                                    struct ieee80211_mgmt *mgmt,
1317                                    size_t len)
1318 {
1319         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1320         u16 auth_alg, auth_transaction, status_code;
1321
1322         if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE)
1323                 return;
1324
1325         if (len < 24 + 6)
1326                 return;
1327
1328         if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1329                 return;
1330
1331         if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1332                 return;
1333
1334         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1335         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1336         status_code = le16_to_cpu(mgmt->u.auth.status_code);
1337
1338         if (auth_alg != ifmgd->auth_alg ||
1339             auth_transaction != ifmgd->auth_transaction)
1340                 return;
1341
1342         if (status_code != WLAN_STATUS_SUCCESS) {
1343                 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1344                         u8 algs[3];
1345                         const int num_algs = ARRAY_SIZE(algs);
1346                         int i, pos;
1347                         algs[0] = algs[1] = algs[2] = 0xff;
1348                         if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1349                                 algs[0] = WLAN_AUTH_OPEN;
1350                         if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1351                                 algs[1] = WLAN_AUTH_SHARED_KEY;
1352                         if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1353                                 algs[2] = WLAN_AUTH_LEAP;
1354                         if (ifmgd->auth_alg == WLAN_AUTH_OPEN)
1355                                 pos = 0;
1356                         else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY)
1357                                 pos = 1;
1358                         else
1359                                 pos = 2;
1360                         for (i = 0; i < num_algs; i++) {
1361                                 pos++;
1362                                 if (pos >= num_algs)
1363                                         pos = 0;
1364                                 if (algs[pos] == ifmgd->auth_alg ||
1365                                     algs[pos] == 0xff)
1366                                         continue;
1367                                 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1368                                     !ieee80211_sta_wep_configured(sdata))
1369                                         continue;
1370                                 ifmgd->auth_alg = algs[pos];
1371                                 break;
1372                         }
1373                 }
1374                 return;
1375         }
1376
1377         switch (ifmgd->auth_alg) {
1378         case WLAN_AUTH_OPEN:
1379         case WLAN_AUTH_LEAP:
1380         case WLAN_AUTH_FT:
1381                 ieee80211_auth_completed(sdata);
1382                 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1383                 break;
1384         case WLAN_AUTH_SHARED_KEY:
1385                 if (ifmgd->auth_transaction == 4) {
1386                         ieee80211_auth_completed(sdata);
1387                         cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1388                 } else
1389                         ieee80211_auth_challenge(sdata, mgmt, len);
1390                 break;
1391         }
1392 }
1393
1394
1395 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1396                                      struct ieee80211_mgmt *mgmt,
1397                                      size_t len)
1398 {
1399         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1400         u16 reason_code;
1401
1402         if (len < 24 + 2)
1403                 return;
1404
1405         if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1406                 return;
1407
1408         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1409
1410         if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED)
1411                 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1412                                 sdata->dev->name, reason_code);
1413
1414         if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1415             (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1416              ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE ||
1417              ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) {
1418                 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1419                 mod_timer(&ifmgd->timer, jiffies +
1420                                       IEEE80211_RETRY_AUTH_INTERVAL);
1421         }
1422
1423         ieee80211_set_disassoc(sdata, true, false, 0);
1424         ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED;
1425         cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, len);
1426 }
1427
1428
1429 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1430                                        struct ieee80211_mgmt *mgmt,
1431                                        size_t len)
1432 {
1433         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1434         u16 reason_code;
1435
1436         if (len < 24 + 2)
1437                 return;
1438
1439         if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1440                 return;
1441
1442         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1443
1444         if (ifmgd->flags & IEEE80211_STA_ASSOCIATED)
1445                 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1446                                 sdata->dev->name, reason_code);
1447
1448         if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1449             ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1450                 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1451                 mod_timer(&ifmgd->timer, jiffies +
1452                                       IEEE80211_RETRY_AUTH_INTERVAL);
1453         }
1454
1455         ieee80211_set_disassoc(sdata, false, false, reason_code);
1456         cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, len);
1457 }
1458
1459
1460 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1461                                          struct ieee80211_mgmt *mgmt,
1462                                          size_t len,
1463                                          int reassoc)
1464 {
1465         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1466         struct ieee80211_local *local = sdata->local;
1467         struct ieee80211_supported_band *sband;
1468         struct sta_info *sta;
1469         u32 rates, basic_rates;
1470         u16 capab_info, status_code, aid;
1471         struct ieee802_11_elems elems;
1472         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1473         u8 *pos;
1474         u32 changed = 0;
1475         int i, j;
1476         bool have_higher_than_11mbit = false, newsta = false;
1477         u16 ap_ht_cap_flags;
1478
1479         /* AssocResp and ReassocResp have identical structure, so process both
1480          * of them in this function. */
1481
1482         if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1483                 return;
1484
1485         if (len < 24 + 6)
1486                 return;
1487
1488         if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1489                 return;
1490
1491         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1492         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1493         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1494
1495         printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1496                "status=%d aid=%d)\n",
1497                sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1498                capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1499
1500         pos = mgmt->u.assoc_resp.variable;
1501         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1502
1503         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1504             elems.timeout_int && elems.timeout_int_len == 5 &&
1505             elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1506                 u32 tu, ms;
1507                 tu = get_unaligned_le32(elems.timeout_int + 1);
1508                 ms = tu * 1024 / 1000;
1509                 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1510                        "comeback duration %u TU (%u ms)\n",
1511                        sdata->dev->name, tu, ms);
1512                 if (ms > IEEE80211_ASSOC_TIMEOUT)
1513                         mod_timer(&ifmgd->timer,
1514                                   jiffies + msecs_to_jiffies(ms));
1515                 return;
1516         }
1517
1518         if (status_code != WLAN_STATUS_SUCCESS) {
1519                 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1520                        sdata->dev->name, status_code);
1521                 /* if this was a reassociation, ensure we try a "full"
1522                  * association next time. This works around some broken APs
1523                  * which do not correctly reject reassociation requests. */
1524                 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1525                 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1526                 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1527                         /* Wait for SME to decide what to do next */
1528                         ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1529                         ieee80211_recalc_idle(local);
1530                 }
1531                 return;
1532         }
1533
1534         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1535                 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1536                        "set\n", sdata->dev->name, aid);
1537         aid &= ~(BIT(15) | BIT(14));
1538
1539         if (!elems.supp_rates) {
1540                 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1541                        sdata->dev->name);
1542                 return;
1543         }
1544
1545         printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1546         ifmgd->aid = aid;
1547         ifmgd->ap_capab = capab_info;
1548
1549         kfree(ifmgd->assocresp_ies);
1550         ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1551         ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL);
1552         if (ifmgd->assocresp_ies)
1553                 memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len);
1554
1555         rcu_read_lock();
1556
1557         /* Add STA entry for the AP */
1558         sta = sta_info_get(local, ifmgd->bssid);
1559         if (!sta) {
1560                 newsta = true;
1561
1562                 sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC);
1563                 if (!sta) {
1564                         printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1565                                " the AP\n", sdata->dev->name);
1566                         rcu_read_unlock();
1567                         return;
1568                 }
1569
1570                 /* update new sta with its last rx activity */
1571                 sta->last_rx = jiffies;
1572         }
1573
1574         /*
1575          * FIXME: Do we really need to update the sta_info's information here?
1576          *        We already know about the AP (we found it in our list) so it
1577          *        should already be filled with the right info, no?
1578          *        As is stands, all this is racy because typically we assume
1579          *        the information that is filled in here (except flags) doesn't
1580          *        change while a STA structure is alive. As such, it should move
1581          *        to between the sta_info_alloc() and sta_info_insert() above.
1582          */
1583
1584         set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1585                            WLAN_STA_AUTHORIZED);
1586
1587         rates = 0;
1588         basic_rates = 0;
1589         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1590
1591         for (i = 0; i < elems.supp_rates_len; i++) {
1592                 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1593                 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1594
1595                 if (rate > 110)
1596                         have_higher_than_11mbit = true;
1597
1598                 for (j = 0; j < sband->n_bitrates; j++) {
1599                         if (sband->bitrates[j].bitrate == rate) {
1600                                 rates |= BIT(j);
1601                                 if (is_basic)
1602                                         basic_rates |= BIT(j);
1603                                 break;
1604                         }
1605                 }
1606         }
1607
1608         for (i = 0; i < elems.ext_supp_rates_len; i++) {
1609                 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1610                 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1611
1612                 if (rate > 110)
1613                         have_higher_than_11mbit = true;
1614
1615                 for (j = 0; j < sband->n_bitrates; j++) {
1616                         if (sband->bitrates[j].bitrate == rate) {
1617                                 rates |= BIT(j);
1618                                 if (is_basic)
1619                                         basic_rates |= BIT(j);
1620                                 break;
1621                         }
1622                 }
1623         }
1624
1625         sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1626         sdata->vif.bss_conf.basic_rates = basic_rates;
1627
1628         /* cf. IEEE 802.11 9.2.12 */
1629         if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1630             have_higher_than_11mbit)
1631                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1632         else
1633                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1634
1635         /* If TKIP/WEP is used, no need to parse AP's HT capabilities */
1636         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1637                 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1638                                 elems.ht_cap_elem, &sta->sta.ht_cap);
1639
1640         ap_ht_cap_flags = sta->sta.ht_cap.cap;
1641
1642         rate_control_rate_init(sta);
1643
1644         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1645                 set_sta_flags(sta, WLAN_STA_MFP);
1646
1647         if (elems.wmm_param)
1648                 set_sta_flags(sta, WLAN_STA_WME);
1649
1650         if (newsta) {
1651                 int err = sta_info_insert(sta);
1652                 if (err) {
1653                         printk(KERN_DEBUG "%s: failed to insert STA entry for"
1654                                " the AP (error %d)\n", sdata->dev->name, err);
1655                         rcu_read_unlock();
1656                         return;
1657                 }
1658         }
1659
1660         rcu_read_unlock();
1661
1662         if (elems.wmm_param)
1663                 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1664                                          elems.wmm_param_len);
1665         else
1666                 ieee80211_set_wmm_default(sdata);
1667
1668         if (elems.ht_info_elem && elems.wmm_param &&
1669             (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1670             !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1671                 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1672                                                ap_ht_cap_flags);
1673
1674         /* set AID and assoc capability,
1675          * ieee80211_set_associated() will tell the driver */
1676         bss_conf->aid = aid;
1677         bss_conf->assoc_capability = capab_info;
1678         ieee80211_set_associated(sdata, changed);
1679
1680         /*
1681          * initialise the time of last beacon to be the association time,
1682          * otherwise beacon loss check will trigger immediately
1683          */
1684         ifmgd->last_beacon = jiffies;
1685
1686         ieee80211_associated(sdata);
1687         cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1688 }
1689
1690
1691 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1692                                   struct ieee80211_mgmt *mgmt,
1693                                   size_t len,
1694                                   struct ieee80211_rx_status *rx_status,
1695                                   struct ieee802_11_elems *elems,
1696                                   bool beacon)
1697 {
1698         struct ieee80211_local *local = sdata->local;
1699         int freq;
1700         struct ieee80211_bss *bss;
1701         struct ieee80211_channel *channel;
1702
1703         if (elems->ds_params && elems->ds_params_len == 1)
1704                 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1705         else
1706                 freq = rx_status->freq;
1707
1708         channel = ieee80211_get_channel(local->hw.wiphy, freq);
1709
1710         if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1711                 return;
1712
1713         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1714                                         channel, beacon);
1715         if (!bss)
1716                 return;
1717
1718         if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1719             (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) {
1720                 struct ieee80211_channel_sw_ie *sw_elem =
1721                         (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1722                 ieee80211_process_chanswitch(sdata, sw_elem, bss);
1723         }
1724
1725         ieee80211_rx_bss_put(local, bss);
1726 }
1727
1728
1729 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1730                                          struct ieee80211_mgmt *mgmt,
1731                                          size_t len,
1732                                          struct ieee80211_rx_status *rx_status)
1733 {
1734         struct ieee80211_if_managed *ifmgd;
1735         size_t baselen;
1736         struct ieee802_11_elems elems;
1737
1738         ifmgd = &sdata->u.mgd;
1739
1740         if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1741                 return; /* ignore ProbeResp to foreign address */
1742
1743         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1744         if (baselen > len)
1745                 return;
1746
1747         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1748                                 &elems);
1749
1750         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1751
1752         /* direct probe may be part of the association flow */
1753         if (ifmgd->state == IEEE80211_STA_MLME_DIRECT_PROBE) {
1754                 printk(KERN_DEBUG "%s direct probe responded\n",
1755                        sdata->dev->name);
1756                 ieee80211_authenticate(sdata);
1757         }
1758
1759         if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
1760                 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1761 }
1762
1763 /*
1764  * This is the canonical list of information elements we care about,
1765  * the filter code also gives us all changes to the Microsoft OUI
1766  * (00:50:F2) vendor IE which is used for WMM which we need to track.
1767  *
1768  * We implement beacon filtering in software since that means we can
1769  * avoid processing the frame here and in cfg80211, and userspace
1770  * will not be able to tell whether the hardware supports it or not.
1771  *
1772  * XXX: This list needs to be dynamic -- userspace needs to be able to
1773  *      add items it requires. It also needs to be able to tell us to
1774  *      look out for other vendor IEs.
1775  */
1776 static const u64 care_about_ies =
1777         (1ULL << WLAN_EID_COUNTRY) |
1778         (1ULL << WLAN_EID_ERP_INFO) |
1779         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1780         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1781         (1ULL << WLAN_EID_HT_CAPABILITY) |
1782         (1ULL << WLAN_EID_HT_INFORMATION);
1783
1784 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1785                                      struct ieee80211_mgmt *mgmt,
1786                                      size_t len,
1787                                      struct ieee80211_rx_status *rx_status)
1788 {
1789         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1790         size_t baselen;
1791         struct ieee802_11_elems elems;
1792         struct ieee80211_local *local = sdata->local;
1793         u32 changed = 0;
1794         bool erp_valid, directed_tim = false;
1795         u8 erp_value = 0;
1796         u32 ncrc;
1797
1798         /* Process beacon from the current BSS */
1799         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1800         if (baselen > len)
1801                 return;
1802
1803         if (rx_status->freq != local->hw.conf.channel->center_freq)
1804                 return;
1805
1806         if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) ||
1807             memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1808                 return;
1809
1810         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1811         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1812                                           len - baselen, &elems,
1813                                           care_about_ies, ncrc);
1814
1815         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1816                 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1817                                                    ifmgd->aid);
1818
1819         ncrc = crc32_be(ncrc, (void *)&directed_tim, sizeof(directed_tim));
1820
1821         if (ncrc == ifmgd->beacon_crc)
1822                 return;
1823         ifmgd->beacon_crc = ncrc;
1824
1825         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
1826
1827         ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1828                                  elems.wmm_param_len);
1829
1830         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1831                 if (directed_tim) {
1832                         if (local->hw.conf.dynamic_ps_timeout > 0) {
1833                                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1834                                 ieee80211_hw_config(local,
1835                                                     IEEE80211_CONF_CHANGE_PS);
1836                                 ieee80211_send_nullfunc(local, sdata, 0);
1837                         } else {
1838                                 local->pspolling = true;
1839
1840                                 /*
1841                                  * Here is assumed that the driver will be
1842                                  * able to send ps-poll frame and receive a
1843                                  * response even though power save mode is
1844                                  * enabled, but some drivers might require
1845                                  * to disable power save here. This needs
1846                                  * to be investigated.
1847                                  */
1848                                 ieee80211_send_pspoll(local, sdata);
1849                         }
1850                 }
1851         }
1852
1853         if (elems.erp_info && elems.erp_info_len >= 1) {
1854                 erp_valid = true;
1855                 erp_value = elems.erp_info[0];
1856         } else {
1857                 erp_valid = false;
1858         }
1859         changed |= ieee80211_handle_bss_capability(sdata,
1860                         le16_to_cpu(mgmt->u.beacon.capab_info),
1861                         erp_valid, erp_value);
1862
1863
1864         if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1865             !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) {
1866                 struct sta_info *sta;
1867                 struct ieee80211_supported_band *sband;
1868                 u16 ap_ht_cap_flags;
1869
1870                 rcu_read_lock();
1871
1872                 sta = sta_info_get(local, ifmgd->bssid);
1873                 if (!sta) {
1874                         rcu_read_unlock();
1875                         return;
1876                 }
1877
1878                 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1879
1880                 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1881                                 elems.ht_cap_elem, &sta->sta.ht_cap);
1882
1883                 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1884
1885                 rcu_read_unlock();
1886
1887                 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1888                                                ap_ht_cap_flags);
1889         }
1890
1891         if (elems.country_elem) {
1892                 /* Note we are only reviewing this on beacons
1893                  * for the BSSID we are associated to */
1894                 regulatory_hint_11d(local->hw.wiphy,
1895                         elems.country_elem, elems.country_elem_len);
1896
1897                 /* TODO: IBSS also needs this */
1898                 if (elems.pwr_constr_elem)
1899                         ieee80211_handle_pwr_constr(sdata,
1900                                 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1901                                 elems.pwr_constr_elem,
1902                                 elems.pwr_constr_elem_len);
1903         }
1904
1905         ieee80211_bss_info_change_notify(sdata, changed);
1906 }
1907
1908 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1909                                           struct sk_buff *skb,
1910                                           struct ieee80211_rx_status *rx_status)
1911 {
1912         struct ieee80211_local *local = sdata->local;
1913         struct ieee80211_mgmt *mgmt;
1914         u16 fc;
1915
1916         if (skb->len < 24)
1917                 return RX_DROP_MONITOR;
1918
1919         mgmt = (struct ieee80211_mgmt *) skb->data;
1920         fc = le16_to_cpu(mgmt->frame_control);
1921
1922         switch (fc & IEEE80211_FCTL_STYPE) {
1923         case IEEE80211_STYPE_PROBE_REQ:
1924         case IEEE80211_STYPE_PROBE_RESP:
1925         case IEEE80211_STYPE_BEACON:
1926                 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1927         case IEEE80211_STYPE_AUTH:
1928         case IEEE80211_STYPE_ASSOC_RESP:
1929         case IEEE80211_STYPE_REASSOC_RESP:
1930         case IEEE80211_STYPE_DEAUTH:
1931         case IEEE80211_STYPE_DISASSOC:
1932                 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1933                 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
1934                 return RX_QUEUED;
1935         }
1936
1937         return RX_DROP_MONITOR;
1938 }
1939
1940 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1941                                          struct sk_buff *skb)
1942 {
1943         struct ieee80211_rx_status *rx_status;
1944         struct ieee80211_mgmt *mgmt;
1945         u16 fc;
1946
1947         rx_status = (struct ieee80211_rx_status *) skb->cb;
1948         mgmt = (struct ieee80211_mgmt *) skb->data;
1949         fc = le16_to_cpu(mgmt->frame_control);
1950
1951         switch (fc & IEEE80211_FCTL_STYPE) {
1952         case IEEE80211_STYPE_PROBE_RESP:
1953                 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
1954                                              rx_status);
1955                 break;
1956         case IEEE80211_STYPE_BEACON:
1957                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1958                                          rx_status);
1959                 break;
1960         case IEEE80211_STYPE_AUTH:
1961                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
1962                 break;
1963         case IEEE80211_STYPE_ASSOC_RESP:
1964                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0);
1965                 break;
1966         case IEEE80211_STYPE_REASSOC_RESP:
1967                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1);
1968                 break;
1969         case IEEE80211_STYPE_DEAUTH:
1970                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1971                 break;
1972         case IEEE80211_STYPE_DISASSOC:
1973                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1974                 break;
1975         }
1976
1977         kfree_skb(skb);
1978 }
1979
1980 static void ieee80211_sta_timer(unsigned long data)
1981 {
1982         struct ieee80211_sub_if_data *sdata =
1983                 (struct ieee80211_sub_if_data *) data;
1984         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1985         struct ieee80211_local *local = sdata->local;
1986
1987         set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1988         queue_work(local->hw.workqueue, &ifmgd->work);
1989 }
1990
1991 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata)
1992 {
1993         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1994         struct ieee80211_local *local = sdata->local;
1995
1996         /* Reset own TSF to allow time synchronization work. */
1997         drv_reset_tsf(local);
1998
1999         ifmgd->wmm_last_param_set = -1; /* allow any WMM update */
2000
2001
2002         if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2003                 ifmgd->auth_alg = WLAN_AUTH_OPEN;
2004         else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2005                 ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY;
2006         else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2007                 ifmgd->auth_alg = WLAN_AUTH_LEAP;
2008         else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_FT)
2009                 ifmgd->auth_alg = WLAN_AUTH_FT;
2010         else
2011                 ifmgd->auth_alg = WLAN_AUTH_OPEN;
2012         ifmgd->auth_transaction = -1;
2013         ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
2014         ifmgd->assoc_scan_tries = 0;
2015         ifmgd->direct_probe_tries = 0;
2016         ifmgd->auth_tries = 0;
2017         ifmgd->assoc_tries = 0;
2018         netif_tx_stop_all_queues(sdata->dev);
2019         netif_carrier_off(sdata->dev);
2020 }
2021
2022 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata)
2023 {
2024         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2025         struct ieee80211_local *local = sdata->local;
2026         struct ieee80211_bss *bss;
2027         u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid;
2028         u8 ssid_len = ifmgd->ssid_len;
2029         u16 capa_mask = WLAN_CAPABILITY_ESS;
2030         u16 capa_val = WLAN_CAPABILITY_ESS;
2031         struct ieee80211_channel *chan = local->oper_channel;
2032
2033         if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
2034             ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2035                             IEEE80211_STA_AUTO_BSSID_SEL |
2036                             IEEE80211_STA_AUTO_CHANNEL_SEL)) {
2037                 capa_mask |= WLAN_CAPABILITY_PRIVACY;
2038                 if (sdata->default_key)
2039                         capa_val |= WLAN_CAPABILITY_PRIVACY;
2040         }
2041
2042         if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2043                 chan = NULL;
2044
2045         if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2046                 bssid = NULL;
2047
2048         if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) {
2049                 ssid = NULL;
2050                 ssid_len = 0;
2051         }
2052
2053         bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
2054                                        bssid, ssid, ssid_len,
2055                                        capa_mask, capa_val);
2056
2057         if (bss) {
2058                 ieee80211_set_freq(sdata, bss->cbss.channel->center_freq);
2059                 if (!(ifmgd->flags & IEEE80211_STA_SSID_SET))
2060                         ieee80211_sta_set_ssid(sdata, bss->ssid,
2061                                                bss->ssid_len);
2062                 ieee80211_sta_set_bssid(sdata, bss->cbss.bssid);
2063                 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
2064                                                     bss->supp_rates);
2065                 if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED)
2066                         sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED;
2067                 else
2068                         sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED;
2069
2070                 /* Send out direct probe if no probe resp was received or
2071                  * the one we have is outdated
2072                  */
2073                 if (!bss->last_probe_resp ||
2074                     time_after(jiffies, bss->last_probe_resp
2075                                         + IEEE80211_SCAN_RESULT_EXPIRE))
2076                         ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2077                 else
2078                         ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2079
2080                 ieee80211_rx_bss_put(local, bss);
2081                 ieee80211_sta_reset_auth(sdata);
2082                 return 0;
2083         } else {
2084                 if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2085
2086                         ifmgd->assoc_scan_tries++;
2087
2088                         ieee80211_request_internal_scan(sdata, ifmgd->ssid,
2089                                                         ssid_len);
2090
2091                         ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2092                         set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
2093                 } else {
2094                         ifmgd->assoc_scan_tries = 0;
2095                         ifmgd->state = IEEE80211_STA_MLME_DISABLED;
2096                         ieee80211_recalc_idle(local);
2097                 }
2098         }
2099         return -1;
2100 }
2101
2102
2103 static void ieee80211_sta_work(struct work_struct *work)
2104 {
2105         struct ieee80211_sub_if_data *sdata =
2106                 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
2107         struct ieee80211_local *local = sdata->local;
2108         struct ieee80211_if_managed *ifmgd;
2109         struct sk_buff *skb;
2110
2111         if (!netif_running(sdata->dev))
2112                 return;
2113
2114         if (local->sw_scanning || local->hw_scanning)
2115                 return;
2116
2117         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2118                 return;
2119         ifmgd = &sdata->u.mgd;
2120
2121         while ((skb = skb_dequeue(&ifmgd->skb_queue)))
2122                 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2123
2124         if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2125             ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2126             ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE &&
2127             test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) {
2128                 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2129                                    round_jiffies_relative(0));
2130                 return;
2131         }
2132
2133         if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) {
2134                 if (ieee80211_sta_config_auth(sdata))
2135                         return;
2136                 clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2137         } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request))
2138                 return;
2139
2140         ieee80211_recalc_idle(local);
2141
2142         switch (ifmgd->state) {
2143         case IEEE80211_STA_MLME_DISABLED:
2144                 break;
2145         case IEEE80211_STA_MLME_DIRECT_PROBE:
2146                 ieee80211_direct_probe(sdata);
2147                 break;
2148         case IEEE80211_STA_MLME_AUTHENTICATE:
2149                 ieee80211_authenticate(sdata);
2150                 break;
2151         case IEEE80211_STA_MLME_ASSOCIATE:
2152                 ieee80211_associate(sdata);
2153                 break;
2154         case IEEE80211_STA_MLME_ASSOCIATED:
2155                 ieee80211_associated(sdata);
2156                 break;
2157         default:
2158                 WARN_ON(1);
2159                 break;
2160         }
2161
2162         if (ieee80211_privacy_mismatch(sdata)) {
2163                 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2164                        "mixed-cell disabled - disassociate\n", sdata->dev->name);
2165
2166                 ieee80211_set_disassoc(sdata, false, true,
2167                                         WLAN_REASON_UNSPECIFIED);
2168         }
2169 }
2170
2171 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2172 {
2173         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2174                 /*
2175                  * Need to update last_beacon to avoid beacon loss
2176                  * test to trigger.
2177                  */
2178                 sdata->u.mgd.last_beacon = jiffies;
2179
2180
2181                 queue_work(sdata->local->hw.workqueue,
2182                            &sdata->u.mgd.work);
2183         }
2184 }
2185
2186 /* interface setup */
2187 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2188 {
2189         struct ieee80211_if_managed *ifmgd;
2190         u32 hw_flags;
2191
2192         ifmgd = &sdata->u.mgd;
2193         INIT_WORK(&ifmgd->work, ieee80211_sta_work);
2194         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
2195         INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
2196         setup_timer(&ifmgd->timer, ieee80211_sta_timer,
2197                     (unsigned long) sdata);
2198         setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
2199                     (unsigned long) sdata);
2200         skb_queue_head_init(&ifmgd->skb_queue);
2201
2202         ifmgd->capab = WLAN_CAPABILITY_ESS;
2203         ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2204                 IEEE80211_AUTH_ALG_SHARED_KEY;
2205         ifmgd->flags |= IEEE80211_STA_CREATE_IBSS |
2206                 IEEE80211_STA_AUTO_BSSID_SEL |
2207                 IEEE80211_STA_AUTO_CHANNEL_SEL;
2208         if (sdata->local->hw.queues >= 4)
2209                 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
2210
2211         hw_flags = sdata->local->hw.flags;
2212
2213         if (hw_flags & IEEE80211_HW_SUPPORTS_PS) {
2214                 ifmgd->powersave = CONFIG_MAC80211_DEFAULT_PS_VALUE;
2215                 sdata->local->hw.conf.dynamic_ps_timeout = 500;
2216         }
2217 }
2218
2219 /* configuration hooks */
2220 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata)
2221 {
2222         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2223         struct ieee80211_local *local = sdata->local;
2224
2225         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2226                 return;
2227
2228         if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET |
2229                              IEEE80211_STA_AUTO_BSSID_SEL)) &&
2230             (ifmgd->flags & (IEEE80211_STA_SSID_SET |
2231                              IEEE80211_STA_AUTO_SSID_SEL))) {
2232
2233                 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)
2234                         ieee80211_set_disassoc(sdata, true, true,
2235                                                WLAN_REASON_DEAUTH_LEAVING);
2236
2237                 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) ||
2238                     ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
2239                         set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
2240                 else if (ifmgd->flags & IEEE80211_STA_EXT_SME)
2241                         set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2242                 queue_work(local->hw.workqueue, &ifmgd->work);
2243         }
2244 }
2245
2246 int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata)
2247 {
2248         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2249
2250         if (ifmgd->ssid_len)
2251                 ifmgd->flags |= IEEE80211_STA_SSID_SET;
2252         else
2253                 ifmgd->flags &= ~IEEE80211_STA_SSID_SET;
2254
2255         return 0;
2256 }
2257
2258 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2259 {
2260         struct ieee80211_if_managed *ifmgd;
2261
2262         if (len > IEEE80211_MAX_SSID_LEN)
2263                 return -EINVAL;
2264
2265         ifmgd = &sdata->u.mgd;
2266
2267         if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) {
2268                 /*
2269                  * Do not use reassociation if SSID is changed (different ESS).
2270                  */
2271                 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2272                 memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid));
2273                 memcpy(ifmgd->ssid, ssid, len);
2274                 ifmgd->ssid_len = len;
2275         }
2276
2277         return ieee80211_sta_commit(sdata);
2278 }
2279
2280 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2281 {
2282         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2283         memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len);
2284         *len = ifmgd->ssid_len;
2285         return 0;
2286 }
2287
2288 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2289 {
2290         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2291
2292         if (is_valid_ether_addr(bssid)) {
2293                 memcpy(ifmgd->bssid, bssid, ETH_ALEN);
2294                 ifmgd->flags |= IEEE80211_STA_BSSID_SET;
2295         } else {
2296                 memset(ifmgd->bssid, 0, ETH_ALEN);
2297                 ifmgd->flags &= ~IEEE80211_STA_BSSID_SET;
2298         }
2299
2300         if (netif_running(sdata->dev))
2301                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2302
2303         return ieee80211_sta_commit(sdata);
2304 }
2305
2306 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
2307                                const char *ie, size_t len)
2308 {
2309         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2310
2311         kfree(ifmgd->extra_ie);
2312         if (len == 0) {
2313                 ifmgd->extra_ie = NULL;
2314                 ifmgd->extra_ie_len = 0;
2315                 return 0;
2316         }
2317         ifmgd->extra_ie = kmalloc(len, GFP_KERNEL);
2318         if (!ifmgd->extra_ie) {
2319                 ifmgd->extra_ie_len = 0;
2320                 return -ENOMEM;
2321         }
2322         memcpy(ifmgd->extra_ie, ie, len);
2323         ifmgd->extra_ie_len = len;
2324         return 0;
2325 }
2326
2327 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2328 {
2329         printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2330                sdata->dev->name, reason);
2331
2332         ieee80211_set_disassoc(sdata, true, true, reason);
2333         return 0;
2334 }
2335
2336 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2337 {
2338         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2339
2340         printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2341                sdata->dev->name, reason);
2342
2343         if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED))
2344                 return -ENOLINK;
2345
2346         ieee80211_set_disassoc(sdata, false, true, reason);
2347         return 0;
2348 }
2349
2350 /* scan finished notification */
2351 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2352 {
2353         struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2354
2355         /* Restart STA timers */
2356         rcu_read_lock();
2357         list_for_each_entry_rcu(sdata, &local->interfaces, list)
2358                 ieee80211_restart_sta_timer(sdata);
2359         rcu_read_unlock();
2360 }
2361
2362 int ieee80211_max_network_latency(struct notifier_block *nb,
2363                                   unsigned long data, void *dummy)
2364 {
2365         s32 latency_usec = (s32) data;
2366         struct ieee80211_local *local =
2367                 container_of(nb, struct ieee80211_local,
2368                              network_latency_notifier);
2369
2370         mutex_lock(&local->iflist_mtx);
2371         ieee80211_recalc_ps(local, latency_usec);
2372         mutex_unlock(&local->iflist_mtx);
2373
2374         return 0;
2375 }