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>
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.
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>
25 #include "ieee80211_i.h"
26 #include "driver-ops.h"
30 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
31 #define IEEE80211_AUTH_MAX_TRIES 3
32 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
33 #define IEEE80211_ASSOC_MAX_TRIES 3
34 #define IEEE80211_MAX_PROBE_TRIES 5
37 * beacon loss detection timeout
38 * XXX: should depend on beacon interval
40 #define IEEE80211_BEACON_LOSS_TIME (2 * HZ)
42 * Time the connection can be idle before we probe
43 * it to see if we can still talk to the AP.
45 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
47 * Time we wait for a probe response after sending
48 * a probe request because of beacon loss or for
49 * checking the connection still works.
51 #define IEEE80211_PROBE_WAIT (HZ / 2)
53 #define TMR_RUNNING_TIMER 0
54 #define TMR_RUNNING_CHANSW 1
57 * All cfg80211 functions have to be called outside a locked
58 * section so that they can acquire a lock themselves... This
59 * is much simpler than queuing up things in cfg80211, but we
60 * do need some indirection for that here.
63 /* no action required */
66 /* caller must call cfg80211_send_rx_auth() */
67 RX_MGMT_CFG80211_AUTH,
69 /* caller must call cfg80211_send_rx_assoc() */
70 RX_MGMT_CFG80211_ASSOC,
72 /* caller must call cfg80211_send_deauth() */
73 RX_MGMT_CFG80211_DEAUTH,
75 /* caller must call cfg80211_send_disassoc() */
76 RX_MGMT_CFG80211_DISASSOC,
78 /* caller must tell cfg80211 about internal error */
79 RX_MGMT_CFG80211_ASSOC_ERROR,
81 /* caller must call cfg80211_auth_timeout() & free work */
82 RX_MGMT_CFG80211_AUTH_TO,
84 /* caller must call cfg80211_assoc_timeout() & free work */
85 RX_MGMT_CFG80211_ASSOC_TO,
89 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
91 WARN_ON(!mutex_is_locked(&ifmgd->mtx));
95 * We can have multiple work items (and connection probing)
96 * scheduling this timer, but we need to take care to only
97 * reschedule it when it should fire _earlier_ than it was
98 * asked for before, or if it's not pending right now. This
99 * function ensures that. Note that it then is required to
100 * run this function for all timeouts after the first one
101 * has happened -- the work that runs from this timer will
104 static void run_again(struct ieee80211_if_managed *ifmgd,
105 unsigned long timeout)
107 ASSERT_MGD_MTX(ifmgd);
109 if (!timer_pending(&ifmgd->timer) ||
110 time_before(timeout, ifmgd->timer.expires))
111 mod_timer(&ifmgd->timer, timeout);
114 static void mod_beacon_timer(struct ieee80211_sub_if_data *sdata)
116 if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
119 mod_timer(&sdata->u.mgd.bcn_mon_timer,
120 round_jiffies_up(jiffies + IEEE80211_BEACON_LOSS_TIME));
123 static int ecw2cw(int ecw)
125 return (1 << ecw) - 1;
128 static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
129 struct ieee80211_supported_band *sband,
135 for (i = 0; i < bss->supp_rates_len; i++) {
136 int rate = (bss->supp_rates[i] & 0x7F) * 5;
138 for (j = 0; j < sband->n_bitrates; j++)
139 if (sband->bitrates[j].bitrate == rate) {
150 * ieee80211_enable_ht should be called only after the operating band
151 * has been determined as ht configuration depends on the hw's
152 * HT abilities for a specific band.
154 static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
155 struct ieee80211_ht_info *hti,
156 const u8 *bssid, u16 ap_ht_cap_flags)
158 struct ieee80211_local *local = sdata->local;
159 struct ieee80211_supported_band *sband;
160 struct sta_info *sta;
163 bool enable_ht = true, ht_changed;
164 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
166 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
168 /* HT is not supported */
169 if (!sband->ht_cap.ht_supported)
172 /* check that channel matches the right operating channel */
173 if (local->hw.conf.channel->center_freq !=
174 ieee80211_channel_to_frequency(hti->control_chan))
178 channel_type = NL80211_CHAN_HT20;
180 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
181 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
182 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
183 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
184 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
185 if (!(local->hw.conf.channel->flags &
186 IEEE80211_CHAN_NO_HT40PLUS))
187 channel_type = NL80211_CHAN_HT40PLUS;
189 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
190 if (!(local->hw.conf.channel->flags &
191 IEEE80211_CHAN_NO_HT40MINUS))
192 channel_type = NL80211_CHAN_HT40MINUS;
198 ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
199 channel_type != local->hw.conf.channel_type;
201 local->oper_channel_type = channel_type;
204 /* channel_type change automatically detected */
205 ieee80211_hw_config(local, 0);
208 sta = sta_info_get(sdata, bssid);
210 rate_control_rate_update(local, sband, sta,
211 IEEE80211_RC_HT_CHANGED);
219 ht_opmode = le16_to_cpu(hti->operation_mode);
221 /* if bss configuration changed store the new one */
222 if (!sdata->ht_opmode_valid ||
223 sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
224 changed |= BSS_CHANGED_HT;
225 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
226 sdata->ht_opmode_valid = true;
232 /* frame sending functions */
234 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
235 struct ieee80211_mgd_work *wk)
237 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
238 struct ieee80211_local *local = sdata->local;
240 struct ieee80211_mgmt *mgmt;
242 const u8 *ies, *ht_ie;
243 int i, len, count, rates_len, supp_rates_len;
246 struct ieee80211_supported_band *sband;
249 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
250 sizeof(*mgmt) + 200 + wk->ie_len +
253 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
254 "frame\n", sdata->name);
257 skb_reserve(skb, local->hw.extra_tx_headroom);
259 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
261 capab = ifmgd->capab;
263 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
264 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
265 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
266 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
267 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
270 if (wk->bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
271 capab |= WLAN_CAPABILITY_PRIVACY;
272 if (wk->bss->wmm_used)
275 /* get all rates supported by the device and the AP as
276 * some APs don't like getting a superset of their rates
277 * in the association request (e.g. D-Link DAP 1353 in
279 rates_len = ieee80211_compatible_rates(wk->bss, sband, &rates);
281 if ((wk->bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
282 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
283 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
285 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
287 memcpy(mgmt->da, wk->bss->cbss.bssid, ETH_ALEN);
288 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
289 memcpy(mgmt->bssid, wk->bss->cbss.bssid, ETH_ALEN);
291 if (!is_zero_ether_addr(wk->prev_bssid)) {
293 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
294 IEEE80211_STYPE_REASSOC_REQ);
295 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
296 mgmt->u.reassoc_req.listen_interval =
297 cpu_to_le16(local->hw.conf.listen_interval);
298 memcpy(mgmt->u.reassoc_req.current_ap, wk->prev_bssid,
302 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
303 IEEE80211_STYPE_ASSOC_REQ);
304 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
305 mgmt->u.assoc_req.listen_interval =
306 cpu_to_le16(local->hw.conf.listen_interval);
310 ies = pos = skb_put(skb, 2 + wk->ssid_len);
311 *pos++ = WLAN_EID_SSID;
312 *pos++ = wk->ssid_len;
313 memcpy(pos, wk->ssid, wk->ssid_len);
315 /* add all rates which were marked to be used above */
316 supp_rates_len = rates_len;
317 if (supp_rates_len > 8)
320 len = sband->n_bitrates;
321 pos = skb_put(skb, supp_rates_len + 2);
322 *pos++ = WLAN_EID_SUPP_RATES;
323 *pos++ = supp_rates_len;
326 for (i = 0; i < sband->n_bitrates; i++) {
327 if (BIT(i) & rates) {
328 int rate = sband->bitrates[i].bitrate;
329 *pos++ = (u8) (rate / 5);
335 if (rates_len > count) {
336 pos = skb_put(skb, rates_len - count + 2);
337 *pos++ = WLAN_EID_EXT_SUPP_RATES;
338 *pos++ = rates_len - count;
340 for (i++; i < sband->n_bitrates; i++) {
341 if (BIT(i) & rates) {
342 int rate = sband->bitrates[i].bitrate;
343 *pos++ = (u8) (rate / 5);
348 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
349 /* 1. power capabilities */
350 pos = skb_put(skb, 4);
351 *pos++ = WLAN_EID_PWR_CAPABILITY;
353 *pos++ = 0; /* min tx power */
354 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
356 /* 2. supported channels */
357 /* TODO: get this in reg domain format */
358 pos = skb_put(skb, 2 * sband->n_channels + 2);
359 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
360 *pos++ = 2 * sband->n_channels;
361 for (i = 0; i < sband->n_channels; i++) {
362 *pos++ = ieee80211_frequency_to_channel(
363 sband->channels[i].center_freq);
364 *pos++ = 1; /* one channel in the subband*/
368 if (wk->ie_len && wk->ie) {
369 pos = skb_put(skb, wk->ie_len);
370 memcpy(pos, wk->ie, wk->ie_len);
373 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
374 pos = skb_put(skb, 9);
375 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
376 *pos++ = 7; /* len */
377 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
380 *pos++ = 2; /* WME */
381 *pos++ = 0; /* WME info */
382 *pos++ = 1; /* WME ver */
386 /* wmm support is a must to HT */
388 * IEEE802.11n does not allow TKIP/WEP as pairwise
389 * ciphers in HT mode. We still associate in non-ht
390 * mode (11a/b/g) if any one of these ciphers is
391 * configured as pairwise.
393 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
394 sband->ht_cap.ht_supported &&
395 (ht_ie = ieee80211_bss_get_ie(&wk->bss->cbss, WLAN_EID_HT_INFORMATION)) &&
396 ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
397 (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))) {
398 struct ieee80211_ht_info *ht_info =
399 (struct ieee80211_ht_info *)(ht_ie + 2);
400 u16 cap = sband->ht_cap.cap;
402 u32 flags = local->hw.conf.channel->flags;
404 /* determine capability flags */
406 if (ieee80211_disable_40mhz_24ghz &&
407 sband->band == IEEE80211_BAND_2GHZ) {
408 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
409 cap &= ~IEEE80211_HT_CAP_SGI_40;
412 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
413 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
414 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
415 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
416 cap &= ~IEEE80211_HT_CAP_SGI_40;
419 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
420 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
421 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
422 cap &= ~IEEE80211_HT_CAP_SGI_40;
427 /* set SM PS mode properly */
428 cap &= ~IEEE80211_HT_CAP_SM_PS;
429 /* new association always uses requested smps mode */
430 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
431 if (ifmgd->powersave)
432 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
434 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
436 ifmgd->ap_smps = ifmgd->req_smps;
438 switch (ifmgd->ap_smps) {
439 case IEEE80211_SMPS_AUTOMATIC:
440 case IEEE80211_SMPS_NUM_MODES:
442 case IEEE80211_SMPS_OFF:
443 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
444 IEEE80211_HT_CAP_SM_PS_SHIFT;
446 case IEEE80211_SMPS_STATIC:
447 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
448 IEEE80211_HT_CAP_SM_PS_SHIFT;
450 case IEEE80211_SMPS_DYNAMIC:
451 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
452 IEEE80211_HT_CAP_SM_PS_SHIFT;
456 /* reserve and fill IE */
458 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
459 *pos++ = WLAN_EID_HT_CAPABILITY;
460 *pos++ = sizeof(struct ieee80211_ht_cap);
461 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
463 /* capability flags */
464 tmp = cpu_to_le16(cap);
465 memcpy(pos, &tmp, sizeof(u16));
468 /* AMPDU parameters */
469 *pos++ = sband->ht_cap.ampdu_factor |
470 (sband->ht_cap.ampdu_density <<
471 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
474 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
475 pos += sizeof(sband->ht_cap.mcs);
477 /* extended capabilities */
478 pos += sizeof(__le16);
480 /* BF capabilities */
481 pos += sizeof(__le32);
483 /* antenna selection */
487 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
488 ieee80211_tx_skb(sdata, skb);
492 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
493 const u8 *bssid, u16 stype, u16 reason,
496 struct ieee80211_local *local = sdata->local;
497 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
499 struct ieee80211_mgmt *mgmt;
501 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
503 printk(KERN_DEBUG "%s: failed to allocate buffer for "
504 "deauth/disassoc frame\n", sdata->name);
507 skb_reserve(skb, local->hw.extra_tx_headroom);
509 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
511 memcpy(mgmt->da, bssid, ETH_ALEN);
512 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
513 memcpy(mgmt->bssid, bssid, ETH_ALEN);
514 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
516 /* u.deauth.reason_code == u.disassoc.reason_code */
517 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
519 if (stype == IEEE80211_STYPE_DEAUTH)
521 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
523 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
526 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
528 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
529 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
530 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
531 ieee80211_tx_skb(sdata, skb);
534 void ieee80211_send_pspoll(struct ieee80211_local *local,
535 struct ieee80211_sub_if_data *sdata)
537 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
538 struct ieee80211_pspoll *pspoll;
542 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
544 printk(KERN_DEBUG "%s: failed to allocate buffer for "
545 "pspoll frame\n", sdata->name);
548 skb_reserve(skb, local->hw.extra_tx_headroom);
550 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
551 memset(pspoll, 0, sizeof(*pspoll));
552 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
553 pspoll->frame_control = cpu_to_le16(fc);
554 pspoll->aid = cpu_to_le16(ifmgd->aid);
556 /* aid in PS-Poll has its two MSBs each set to 1 */
557 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
559 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
560 memcpy(pspoll->ta, sdata->vif.addr, ETH_ALEN);
562 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
563 ieee80211_tx_skb(sdata, skb);
566 void ieee80211_send_nullfunc(struct ieee80211_local *local,
567 struct ieee80211_sub_if_data *sdata,
571 struct ieee80211_hdr *nullfunc;
574 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
577 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
579 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
580 "frame\n", sdata->name);
583 skb_reserve(skb, local->hw.extra_tx_headroom);
585 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
586 memset(nullfunc, 0, 24);
587 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
588 IEEE80211_FCTL_TODS);
590 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
591 nullfunc->frame_control = fc;
592 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
593 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
594 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
596 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
597 ieee80211_tx_skb(sdata, skb);
600 /* spectrum management related things */
601 static void ieee80211_chswitch_work(struct work_struct *work)
603 struct ieee80211_sub_if_data *sdata =
604 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
605 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
607 if (!netif_running(sdata->dev))
610 mutex_lock(&ifmgd->mtx);
611 if (!ifmgd->associated)
614 sdata->local->oper_channel = sdata->local->csa_channel;
615 ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL);
617 /* XXX: shouldn't really modify cfg80211-owned data! */
618 ifmgd->associated->cbss.channel = sdata->local->oper_channel;
620 ieee80211_wake_queues_by_reason(&sdata->local->hw,
621 IEEE80211_QUEUE_STOP_REASON_CSA);
623 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
624 mutex_unlock(&ifmgd->mtx);
627 static void ieee80211_chswitch_timer(unsigned long data)
629 struct ieee80211_sub_if_data *sdata =
630 (struct ieee80211_sub_if_data *) data;
631 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
633 if (sdata->local->quiescing) {
634 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
638 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
641 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
642 struct ieee80211_channel_sw_ie *sw_elem,
643 struct ieee80211_bss *bss)
645 struct ieee80211_channel *new_ch;
646 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
647 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
649 ASSERT_MGD_MTX(ifmgd);
651 if (!ifmgd->associated)
654 if (sdata->local->scanning)
657 /* Disregard subsequent beacons if we are already running a timer
660 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
663 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
664 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
667 sdata->local->csa_channel = new_ch;
669 if (sw_elem->count <= 1) {
670 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
672 ieee80211_stop_queues_by_reason(&sdata->local->hw,
673 IEEE80211_QUEUE_STOP_REASON_CSA);
674 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
675 mod_timer(&ifmgd->chswitch_timer,
677 msecs_to_jiffies(sw_elem->count *
678 bss->cbss.beacon_interval));
682 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
683 u16 capab_info, u8 *pwr_constr_elem,
684 u8 pwr_constr_elem_len)
686 struct ieee80211_conf *conf = &sdata->local->hw.conf;
688 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
691 /* Power constraint IE length should be 1 octet */
692 if (pwr_constr_elem_len != 1)
695 if ((*pwr_constr_elem <= conf->channel->max_power) &&
696 (*pwr_constr_elem != sdata->local->power_constr_level)) {
697 sdata->local->power_constr_level = *pwr_constr_elem;
698 ieee80211_hw_config(sdata->local, 0);
703 static void ieee80211_enable_ps(struct ieee80211_local *local,
704 struct ieee80211_sub_if_data *sdata)
706 struct ieee80211_conf *conf = &local->hw.conf;
709 * If we are scanning right now then the parameters will
710 * take effect when scan finishes.
715 if (conf->dynamic_ps_timeout > 0 &&
716 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
717 mod_timer(&local->dynamic_ps_timer, jiffies +
718 msecs_to_jiffies(conf->dynamic_ps_timeout));
720 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
721 ieee80211_send_nullfunc(local, sdata, 1);
722 conf->flags |= IEEE80211_CONF_PS;
723 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
727 static void ieee80211_change_ps(struct ieee80211_local *local)
729 struct ieee80211_conf *conf = &local->hw.conf;
731 if (local->ps_sdata) {
732 ieee80211_enable_ps(local, local->ps_sdata);
733 } else if (conf->flags & IEEE80211_CONF_PS) {
734 conf->flags &= ~IEEE80211_CONF_PS;
735 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
736 del_timer_sync(&local->dynamic_ps_timer);
737 cancel_work_sync(&local->dynamic_ps_enable_work);
741 /* need to hold RTNL or interface lock */
742 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
744 struct ieee80211_sub_if_data *sdata, *found = NULL;
747 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
748 local->ps_sdata = NULL;
752 list_for_each_entry(sdata, &local->interfaces, list) {
753 if (!netif_running(sdata->dev))
755 if (sdata->vif.type != NL80211_IFTYPE_STATION)
761 if (count == 1 && found->u.mgd.powersave &&
762 found->u.mgd.associated && list_empty(&found->u.mgd.work_list) &&
763 !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
764 IEEE80211_STA_CONNECTION_POLL))) {
768 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
770 beaconint_us = ieee80211_tu_to_usec(
771 found->vif.bss_conf.beacon_int);
773 if (beaconint_us > latency) {
774 local->ps_sdata = NULL;
776 u8 dtimper = found->vif.bss_conf.dtim_period;
780 maxslp = min_t(int, dtimper,
781 latency / beaconint_us);
783 local->hw.conf.max_sleep_period = maxslp;
784 local->ps_sdata = found;
787 local->ps_sdata = NULL;
790 ieee80211_change_ps(local);
793 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
795 struct ieee80211_local *local =
796 container_of(work, struct ieee80211_local,
797 dynamic_ps_disable_work);
799 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
800 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
801 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
804 ieee80211_wake_queues_by_reason(&local->hw,
805 IEEE80211_QUEUE_STOP_REASON_PS);
808 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
810 struct ieee80211_local *local =
811 container_of(work, struct ieee80211_local,
812 dynamic_ps_enable_work);
813 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
815 /* can only happen when PS was just disabled anyway */
819 if (local->hw.conf.flags & IEEE80211_CONF_PS)
822 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
823 ieee80211_send_nullfunc(local, sdata, 1);
825 local->hw.conf.flags |= IEEE80211_CONF_PS;
826 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
829 void ieee80211_dynamic_ps_timer(unsigned long data)
831 struct ieee80211_local *local = (void *) data;
833 if (local->quiescing || local->suspended)
836 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
840 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
841 struct ieee80211_if_managed *ifmgd,
842 u8 *wmm_param, size_t wmm_param_len)
844 struct ieee80211_tx_queue_params params;
849 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
855 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
857 count = wmm_param[6] & 0x0f;
858 if (count == ifmgd->wmm_last_param_set)
860 ifmgd->wmm_last_param_set = count;
863 left = wmm_param_len - 8;
865 memset(¶ms, 0, sizeof(params));
868 for (; left >= 4; left -= 4, pos += 4) {
869 int aci = (pos[0] >> 5) & 0x03;
870 int acm = (pos[0] >> 4) & 0x01;
877 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
882 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
887 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
893 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
897 params.aifs = pos[0] & 0x0f;
898 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
899 params.cw_min = ecw2cw(pos[1] & 0x0f);
900 params.txop = get_unaligned_le16(pos + 2);
901 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
902 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
903 "cWmin=%d cWmax=%d txop=%d\n",
904 wiphy_name(local->hw.wiphy), queue, aci, acm,
905 params.aifs, params.cw_min, params.cw_max, params.txop);
907 if (drv_conf_tx(local, queue, ¶ms) && local->ops->conf_tx)
908 printk(KERN_DEBUG "%s: failed to set TX queue "
909 "parameters for queue %d\n",
910 wiphy_name(local->hw.wiphy), queue);
914 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
915 u16 capab, bool erp_valid, u8 erp)
917 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
920 bool use_short_preamble;
924 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
925 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
927 use_protection = false;
928 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
931 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
933 if (use_protection != bss_conf->use_cts_prot) {
934 bss_conf->use_cts_prot = use_protection;
935 changed |= BSS_CHANGED_ERP_CTS_PROT;
938 if (use_short_preamble != bss_conf->use_short_preamble) {
939 bss_conf->use_short_preamble = use_short_preamble;
940 changed |= BSS_CHANGED_ERP_PREAMBLE;
943 if (use_short_slot != bss_conf->use_short_slot) {
944 bss_conf->use_short_slot = use_short_slot;
945 changed |= BSS_CHANGED_ERP_SLOT;
951 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
952 struct ieee80211_mgd_work *wk,
953 u32 bss_info_changed)
955 struct ieee80211_local *local = sdata->local;
956 struct ieee80211_bss *bss = wk->bss;
958 bss_info_changed |= BSS_CHANGED_ASSOC;
959 /* set timing information */
960 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
961 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
962 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
964 bss_info_changed |= BSS_CHANGED_BEACON_INT;
965 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
966 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
968 sdata->u.mgd.associated = bss;
969 sdata->u.mgd.old_associate_work = wk;
970 memcpy(sdata->u.mgd.bssid, bss->cbss.bssid, ETH_ALEN);
972 /* just to be sure */
973 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
974 IEEE80211_STA_BEACON_POLL);
977 * Always handle WMM once after association regardless
978 * of the first value the AP uses. Setting -1 here has
979 * that effect because the AP values is an unsigned
982 sdata->u.mgd.wmm_last_param_set = -1;
984 ieee80211_led_assoc(local, 1);
986 sdata->vif.bss_conf.assoc = 1;
988 * For now just always ask the driver to update the basic rateset
989 * when we have associated, we aren't checking whether it actually
992 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
994 /* And the BSSID changed - we're associated now */
995 bss_info_changed |= BSS_CHANGED_BSSID;
997 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
999 mutex_lock(&local->iflist_mtx);
1000 ieee80211_recalc_ps(local, -1);
1001 ieee80211_recalc_smps(local, sdata);
1002 mutex_unlock(&local->iflist_mtx);
1004 netif_start_queue(sdata->dev);
1005 netif_carrier_on(sdata->dev);
1008 static enum rx_mgmt_action __must_check
1009 ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
1010 struct ieee80211_mgd_work *wk)
1012 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1013 struct ieee80211_local *local = sdata->local;
1016 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
1017 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
1018 sdata->name, wk->bss->cbss.bssid);
1021 * Most likely AP is not in the range so remove the
1022 * bss struct for that AP.
1024 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
1027 * We might have a pending scan which had no chance to run yet
1028 * due to work needing to be done. Hence, queue the STAs work
1031 ieee80211_queue_work(&local->hw, &ifmgd->work);
1032 return RX_MGMT_CFG80211_AUTH_TO;
1035 printk(KERN_DEBUG "%s: direct probe to AP %pM (try %d)\n",
1036 sdata->name, wk->bss->cbss.bssid,
1040 * Direct probe is sent to broadcast address as some APs
1041 * will not answer to direct packet in unassociated state.
1043 ieee80211_send_probe_req(sdata, NULL, wk->ssid, wk->ssid_len, NULL, 0);
1045 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
1046 run_again(ifmgd, wk->timeout);
1048 return RX_MGMT_NONE;
1052 static enum rx_mgmt_action __must_check
1053 ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
1054 struct ieee80211_mgd_work *wk)
1056 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1057 struct ieee80211_local *local = sdata->local;
1060 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
1061 printk(KERN_DEBUG "%s: authentication with AP %pM"
1063 sdata->name, wk->bss->cbss.bssid);
1066 * Most likely AP is not in the range so remove the
1067 * bss struct for that AP.
1069 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
1072 * We might have a pending scan which had no chance to run yet
1073 * due to work needing to be done. Hence, queue the STAs work
1076 ieee80211_queue_work(&local->hw, &ifmgd->work);
1077 return RX_MGMT_CFG80211_AUTH_TO;
1080 printk(KERN_DEBUG "%s: authenticate with AP %pM (try %d)\n",
1081 sdata->name, wk->bss->cbss.bssid, wk->tries);
1083 ieee80211_send_auth(sdata, 1, wk->auth_alg, wk->ie, wk->ie_len,
1084 wk->bss->cbss.bssid, NULL, 0, 0);
1085 wk->auth_transaction = 2;
1087 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
1088 run_again(ifmgd, wk->timeout);
1090 return RX_MGMT_NONE;
1093 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1096 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1097 struct ieee80211_local *local = sdata->local;
1098 struct sta_info *sta;
1099 u32 changed = 0, config_changed = 0;
1102 ASSERT_MGD_MTX(ifmgd);
1104 if (WARN_ON(!ifmgd->associated))
1107 memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN);
1109 ifmgd->associated = NULL;
1110 memset(ifmgd->bssid, 0, ETH_ALEN);
1113 kfree(ifmgd->old_associate_work);
1114 ifmgd->old_associate_work = NULL;
1116 struct ieee80211_mgd_work *wk = ifmgd->old_associate_work;
1118 wk->state = IEEE80211_MGD_STATE_IDLE;
1119 list_add(&wk->list, &ifmgd->work_list);
1123 * we need to commit the associated = NULL change because the
1124 * scan code uses that to determine whether this iface should
1125 * go to/wake up from powersave or not -- and could otherwise
1126 * wake the queues erroneously.
1131 * Thus, we can only afterwards stop the queues -- to account
1132 * for the case where another CPU is finishing a scan at this
1133 * time -- we don't want the scan code to enable queues.
1136 netif_stop_queue(sdata->dev);
1137 netif_carrier_off(sdata->dev);
1140 sta = sta_info_get(sdata, bssid);
1142 ieee80211_sta_tear_down_BA_sessions(sta);
1145 changed |= ieee80211_reset_erp_info(sdata);
1147 ieee80211_led_assoc(local, 0);
1148 changed |= BSS_CHANGED_ASSOC;
1149 sdata->vif.bss_conf.assoc = false;
1151 ieee80211_set_wmm_default(sdata);
1153 /* channel(_type) changes are handled by ieee80211_hw_config */
1154 local->oper_channel_type = NL80211_CHAN_NO_HT;
1156 /* on the next assoc, re-program HT parameters */
1157 sdata->ht_opmode_valid = false;
1159 local->power_constr_level = 0;
1161 del_timer_sync(&local->dynamic_ps_timer);
1162 cancel_work_sync(&local->dynamic_ps_enable_work);
1164 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1165 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1166 config_changed |= IEEE80211_CONF_CHANGE_PS;
1169 ieee80211_hw_config(local, config_changed);
1171 /* And the BSSID changed -- not very interesting here */
1172 changed |= BSS_CHANGED_BSSID;
1173 ieee80211_bss_info_change_notify(sdata, changed);
1177 sta = sta_info_get(sdata, bssid);
1183 sta_info_unlink(&sta);
1187 sta_info_destroy(sta);
1190 static enum rx_mgmt_action __must_check
1191 ieee80211_associate(struct ieee80211_sub_if_data *sdata,
1192 struct ieee80211_mgd_work *wk)
1194 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1195 struct ieee80211_local *local = sdata->local;
1198 if (wk->tries > IEEE80211_ASSOC_MAX_TRIES) {
1199 printk(KERN_DEBUG "%s: association with AP %pM"
1201 sdata->name, wk->bss->cbss.bssid);
1204 * Most likely AP is not in the range so remove the
1205 * bss struct for that AP.
1207 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
1210 * We might have a pending scan which had no chance to run yet
1211 * due to work needing to be done. Hence, queue the STAs work
1214 ieee80211_queue_work(&local->hw, &ifmgd->work);
1215 return RX_MGMT_CFG80211_ASSOC_TO;
1218 printk(KERN_DEBUG "%s: associate with AP %pM (try %d)\n",
1219 sdata->name, wk->bss->cbss.bssid, wk->tries);
1220 ieee80211_send_assoc(sdata, wk);
1222 wk->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
1223 run_again(ifmgd, wk->timeout);
1225 return RX_MGMT_NONE;
1228 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1229 struct ieee80211_hdr *hdr)
1232 * We can postpone the mgd.timer whenever receiving unicast frames
1233 * from AP because we know that the connection is working both ways
1234 * at that time. But multicast frames (and hence also beacons) must
1235 * be ignored here, because we need to trigger the timer during
1236 * data idle periods for sending the periodic probe request to the
1237 * AP we're connected to.
1239 if (is_multicast_ether_addr(hdr->addr1))
1242 mod_timer(&sdata->u.mgd.conn_mon_timer,
1243 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
1246 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1248 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1251 ssid = ieee80211_bss_get_ie(&ifmgd->associated->cbss, WLAN_EID_SSID);
1252 ieee80211_send_probe_req(sdata, ifmgd->associated->cbss.bssid,
1253 ssid + 2, ssid[1], NULL, 0);
1255 ifmgd->probe_send_count++;
1256 ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
1257 run_again(ifmgd, ifmgd->probe_timeout);
1260 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1263 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1264 bool already = false;
1266 if (!netif_running(sdata->dev))
1269 if (sdata->local->scanning)
1272 mutex_lock(&ifmgd->mtx);
1274 if (!ifmgd->associated)
1277 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1278 if (beacon && net_ratelimit())
1279 printk(KERN_DEBUG "%s: detected beacon loss from AP "
1280 "- sending probe request\n", sdata->name);
1284 * The driver/our work has already reported this event or the
1285 * connection monitoring has kicked in and we have already sent
1286 * a probe request. Or maybe the AP died and the driver keeps
1287 * reporting until we disassociate...
1289 * In either case we have to ignore the current call to this
1290 * function (except for setting the correct probe reason bit)
1291 * because otherwise we would reset the timer every time and
1292 * never check whether we received a probe response!
1294 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1295 IEEE80211_STA_CONNECTION_POLL))
1299 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1301 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1306 mutex_lock(&sdata->local->iflist_mtx);
1307 ieee80211_recalc_ps(sdata->local, -1);
1308 mutex_unlock(&sdata->local->iflist_mtx);
1310 ifmgd->probe_send_count = 0;
1311 ieee80211_mgd_probe_ap_send(sdata);
1313 mutex_unlock(&ifmgd->mtx);
1316 void ieee80211_beacon_loss_work(struct work_struct *work)
1318 struct ieee80211_sub_if_data *sdata =
1319 container_of(work, struct ieee80211_sub_if_data,
1320 u.mgd.beacon_loss_work);
1322 ieee80211_mgd_probe_ap(sdata, true);
1325 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1327 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1329 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work);
1331 EXPORT_SYMBOL(ieee80211_beacon_loss);
1333 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
1334 struct ieee80211_mgd_work *wk)
1336 wk->state = IEEE80211_MGD_STATE_IDLE;
1337 printk(KERN_DEBUG "%s: authenticated\n", sdata->name);
1341 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1342 struct ieee80211_mgd_work *wk,
1343 struct ieee80211_mgmt *mgmt,
1347 struct ieee802_11_elems elems;
1349 pos = mgmt->u.auth.variable;
1350 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1351 if (!elems.challenge)
1353 ieee80211_send_auth(sdata, 3, wk->auth_alg,
1354 elems.challenge - 2, elems.challenge_len + 2,
1355 wk->bss->cbss.bssid,
1356 wk->key, wk->key_len, wk->key_idx);
1357 wk->auth_transaction = 4;
1360 static enum rx_mgmt_action __must_check
1361 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1362 struct ieee80211_mgd_work *wk,
1363 struct ieee80211_mgmt *mgmt, size_t len)
1365 u16 auth_alg, auth_transaction, status_code;
1367 if (wk->state != IEEE80211_MGD_STATE_AUTH)
1368 return RX_MGMT_NONE;
1371 return RX_MGMT_NONE;
1373 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1374 return RX_MGMT_NONE;
1376 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
1377 return RX_MGMT_NONE;
1379 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1380 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1381 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1383 if (auth_alg != wk->auth_alg ||
1384 auth_transaction != wk->auth_transaction)
1385 return RX_MGMT_NONE;
1387 if (status_code != WLAN_STATUS_SUCCESS) {
1388 list_del(&wk->list);
1390 return RX_MGMT_CFG80211_AUTH;
1393 switch (wk->auth_alg) {
1394 case WLAN_AUTH_OPEN:
1395 case WLAN_AUTH_LEAP:
1397 ieee80211_auth_completed(sdata, wk);
1398 return RX_MGMT_CFG80211_AUTH;
1399 case WLAN_AUTH_SHARED_KEY:
1400 if (wk->auth_transaction == 4) {
1401 ieee80211_auth_completed(sdata, wk);
1402 return RX_MGMT_CFG80211_AUTH;
1404 ieee80211_auth_challenge(sdata, wk, mgmt, len);
1408 return RX_MGMT_NONE;
1412 static enum rx_mgmt_action __must_check
1413 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1414 struct ieee80211_mgd_work *wk,
1415 struct ieee80211_mgmt *mgmt, size_t len)
1417 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1418 const u8 *bssid = NULL;
1422 return RX_MGMT_NONE;
1424 ASSERT_MGD_MTX(ifmgd);
1427 bssid = wk->bss->cbss.bssid;
1429 bssid = ifmgd->associated->cbss.bssid;
1431 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1433 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1434 sdata->name, bssid, reason_code);
1437 ieee80211_set_disassoc(sdata, true);
1438 ieee80211_recalc_idle(sdata->local);
1440 list_del(&wk->list);
1444 return RX_MGMT_CFG80211_DEAUTH;
1448 static enum rx_mgmt_action __must_check
1449 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1450 struct ieee80211_mgmt *mgmt, size_t len)
1452 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1456 return RX_MGMT_NONE;
1458 ASSERT_MGD_MTX(ifmgd);
1460 if (WARN_ON(!ifmgd->associated))
1461 return RX_MGMT_NONE;
1463 if (WARN_ON(memcmp(ifmgd->associated->cbss.bssid, mgmt->sa, ETH_ALEN)))
1464 return RX_MGMT_NONE;
1466 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1468 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
1469 sdata->name, mgmt->sa, reason_code);
1471 ieee80211_set_disassoc(sdata, false);
1472 ieee80211_recalc_idle(sdata->local);
1473 return RX_MGMT_CFG80211_DISASSOC;
1477 static enum rx_mgmt_action __must_check
1478 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1479 struct ieee80211_mgd_work *wk,
1480 struct ieee80211_mgmt *mgmt, size_t len,
1483 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1484 struct ieee80211_local *local = sdata->local;
1485 struct ieee80211_supported_band *sband;
1486 struct sta_info *sta;
1487 u32 rates, basic_rates;
1488 u16 capab_info, status_code, aid;
1489 struct ieee802_11_elems elems;
1490 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1494 bool have_higher_than_11mbit = false;
1495 u16 ap_ht_cap_flags;
1498 * AssocResp and ReassocResp have identical structure, so process both
1499 * of them in this function.
1503 return RX_MGMT_NONE;
1505 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1506 return RX_MGMT_NONE;
1508 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1509 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1510 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1512 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1513 "status=%d aid=%d)\n",
1514 sdata->name, reassoc ? "Rea" : "A", mgmt->sa,
1515 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1517 pos = mgmt->u.assoc_resp.variable;
1518 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1520 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1521 elems.timeout_int && elems.timeout_int_len == 5 &&
1522 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1524 tu = get_unaligned_le32(elems.timeout_int + 1);
1525 ms = tu * 1024 / 1000;
1526 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1527 "comeback duration %u TU (%u ms)\n",
1528 sdata->name, tu, ms);
1529 wk->timeout = jiffies + msecs_to_jiffies(ms);
1530 if (ms > IEEE80211_ASSOC_TIMEOUT)
1531 run_again(ifmgd, jiffies + msecs_to_jiffies(ms));
1532 return RX_MGMT_NONE;
1535 if (status_code != WLAN_STATUS_SUCCESS) {
1536 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1537 sdata->name, status_code);
1538 wk->state = IEEE80211_MGD_STATE_IDLE;
1539 return RX_MGMT_CFG80211_ASSOC;
1542 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1543 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1544 "set\n", sdata->name, aid);
1545 aid &= ~(BIT(15) | BIT(14));
1547 if (!elems.supp_rates) {
1548 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1550 return RX_MGMT_NONE;
1553 printk(KERN_DEBUG "%s: associated\n", sdata->name);
1556 sta = sta_info_alloc(sdata, wk->bss->cbss.bssid, GFP_KERNEL);
1558 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1559 " the AP\n", sdata->name);
1560 return RX_MGMT_CFG80211_ASSOC_ERROR;
1563 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1565 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1566 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1570 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1572 for (i = 0; i < elems.supp_rates_len; i++) {
1573 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1574 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1577 have_higher_than_11mbit = true;
1579 for (j = 0; j < sband->n_bitrates; j++) {
1580 if (sband->bitrates[j].bitrate == rate) {
1583 basic_rates |= BIT(j);
1589 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1590 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1591 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1594 have_higher_than_11mbit = true;
1596 for (j = 0; j < sband->n_bitrates; j++) {
1597 if (sband->bitrates[j].bitrate == rate) {
1600 basic_rates |= BIT(j);
1606 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1607 sdata->vif.bss_conf.basic_rates = basic_rates;
1609 /* cf. IEEE 802.11 9.2.12 */
1610 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1611 have_higher_than_11mbit)
1612 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1614 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1616 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1617 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1618 elems.ht_cap_elem, &sta->sta.ht_cap);
1620 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1622 rate_control_rate_init(sta);
1624 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1625 set_sta_flags(sta, WLAN_STA_MFP);
1627 if (elems.wmm_param)
1628 set_sta_flags(sta, WLAN_STA_WME);
1630 err = sta_info_insert(sta);
1633 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1634 " the AP (error %d)\n", sdata->name, err);
1635 return RX_MGMT_CFG80211_ASSOC_ERROR;
1638 if (elems.wmm_param)
1639 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1640 elems.wmm_param_len);
1642 ieee80211_set_wmm_default(sdata);
1644 if (elems.ht_info_elem && elems.wmm_param &&
1645 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1646 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1647 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1648 wk->bss->cbss.bssid,
1651 /* delete work item -- must be before set_associated for PS */
1652 list_del(&wk->list);
1654 /* set AID and assoc capability,
1655 * ieee80211_set_associated() will tell the driver */
1656 bss_conf->aid = aid;
1657 bss_conf->assoc_capability = capab_info;
1658 /* this will take ownership of wk */
1659 ieee80211_set_associated(sdata, wk, changed);
1662 * Start timer to probe the connection to the AP now.
1663 * Also start the timer that will detect beacon loss.
1665 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1666 mod_beacon_timer(sdata);
1668 return RX_MGMT_CFG80211_ASSOC;
1672 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1673 struct ieee80211_mgmt *mgmt,
1675 struct ieee80211_rx_status *rx_status,
1676 struct ieee802_11_elems *elems,
1679 struct ieee80211_local *local = sdata->local;
1681 struct ieee80211_bss *bss;
1682 struct ieee80211_channel *channel;
1684 if (elems->ds_params && elems->ds_params_len == 1)
1685 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1687 freq = rx_status->freq;
1689 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1691 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1694 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1697 ieee80211_rx_bss_put(local, bss);
1699 if (!sdata->u.mgd.associated)
1702 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1703 (memcmp(mgmt->bssid, sdata->u.mgd.associated->cbss.bssid,
1705 struct ieee80211_channel_sw_ie *sw_elem =
1706 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1707 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
1712 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1713 struct ieee80211_mgd_work *wk,
1714 struct ieee80211_mgmt *mgmt, size_t len,
1715 struct ieee80211_rx_status *rx_status)
1717 struct ieee80211_if_managed *ifmgd;
1719 struct ieee802_11_elems elems;
1721 ifmgd = &sdata->u.mgd;
1723 ASSERT_MGD_MTX(ifmgd);
1725 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
1726 return; /* ignore ProbeResp to foreign address */
1728 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1732 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1735 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1737 /* direct probe may be part of the association flow */
1738 if (wk && wk->state == IEEE80211_MGD_STATE_PROBE) {
1739 printk(KERN_DEBUG "%s: direct probe responded\n",
1742 wk->state = IEEE80211_MGD_STATE_AUTH;
1743 WARN_ON(ieee80211_authenticate(sdata, wk) != RX_MGMT_NONE);
1746 if (ifmgd->associated &&
1747 memcmp(mgmt->bssid, ifmgd->associated->cbss.bssid, ETH_ALEN) == 0 &&
1748 ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1749 IEEE80211_STA_CONNECTION_POLL)) {
1750 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1751 IEEE80211_STA_BEACON_POLL);
1752 mutex_lock(&sdata->local->iflist_mtx);
1753 ieee80211_recalc_ps(sdata->local, -1);
1754 mutex_unlock(&sdata->local->iflist_mtx);
1756 * We've received a probe response, but are not sure whether
1757 * we have or will be receiving any beacons or data, so let's
1758 * schedule the timers again, just in case.
1760 mod_beacon_timer(sdata);
1761 mod_timer(&ifmgd->conn_mon_timer,
1762 round_jiffies_up(jiffies +
1763 IEEE80211_CONNECTION_IDLE_TIME));
1768 * This is the canonical list of information elements we care about,
1769 * the filter code also gives us all changes to the Microsoft OUI
1770 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1772 * We implement beacon filtering in software since that means we can
1773 * avoid processing the frame here and in cfg80211, and userspace
1774 * will not be able to tell whether the hardware supports it or not.
1776 * XXX: This list needs to be dynamic -- userspace needs to be able to
1777 * add items it requires. It also needs to be able to tell us to
1778 * look out for other vendor IEs.
1780 static const u64 care_about_ies =
1781 (1ULL << WLAN_EID_COUNTRY) |
1782 (1ULL << WLAN_EID_ERP_INFO) |
1783 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1784 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1785 (1ULL << WLAN_EID_HT_CAPABILITY) |
1786 (1ULL << WLAN_EID_HT_INFORMATION);
1788 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1789 struct ieee80211_mgmt *mgmt,
1791 struct ieee80211_rx_status *rx_status)
1793 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1795 struct ieee802_11_elems elems;
1796 struct ieee80211_local *local = sdata->local;
1798 bool erp_valid, directed_tim = false;
1803 ASSERT_MGD_MTX(ifmgd);
1805 /* Process beacon from the current BSS */
1806 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1810 if (rx_status->freq != local->hw.conf.channel->center_freq)
1814 * We might have received a number of frames, among them a
1815 * disassoc frame and a beacon...
1817 if (!ifmgd->associated)
1820 bssid = ifmgd->associated->cbss.bssid;
1823 * And in theory even frames from a different AP we were just
1824 * associated to a split-second ago!
1826 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
1829 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
1830 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1831 if (net_ratelimit()) {
1832 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1833 "to a received beacon\n", sdata->name);
1836 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
1837 mutex_lock(&local->iflist_mtx);
1838 ieee80211_recalc_ps(local, -1);
1839 mutex_unlock(&local->iflist_mtx);
1843 * Push the beacon loss detection into the future since
1844 * we are processing a beacon from the AP just now.
1846 mod_beacon_timer(sdata);
1848 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1849 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1850 len - baselen, &elems,
1851 care_about_ies, ncrc);
1853 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1854 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1857 if (ncrc != ifmgd->beacon_crc) {
1858 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1861 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1862 elems.wmm_param_len);
1865 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1867 if (local->hw.conf.dynamic_ps_timeout > 0) {
1868 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1869 ieee80211_hw_config(local,
1870 IEEE80211_CONF_CHANGE_PS);
1871 ieee80211_send_nullfunc(local, sdata, 0);
1873 local->pspolling = true;
1876 * Here is assumed that the driver will be
1877 * able to send ps-poll frame and receive a
1878 * response even though power save mode is
1879 * enabled, but some drivers might require
1880 * to disable power save here. This needs
1881 * to be investigated.
1883 ieee80211_send_pspoll(local, sdata);
1888 if (ncrc == ifmgd->beacon_crc)
1890 ifmgd->beacon_crc = ncrc;
1892 if (elems.erp_info && elems.erp_info_len >= 1) {
1894 erp_value = elems.erp_info[0];
1898 changed |= ieee80211_handle_bss_capability(sdata,
1899 le16_to_cpu(mgmt->u.beacon.capab_info),
1900 erp_valid, erp_value);
1903 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1904 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
1905 struct sta_info *sta;
1906 struct ieee80211_supported_band *sband;
1907 u16 ap_ht_cap_flags;
1911 sta = sta_info_get(sdata, bssid);
1912 if (WARN_ON(!sta)) {
1917 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1919 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1920 elems.ht_cap_elem, &sta->sta.ht_cap);
1922 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1926 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1927 bssid, ap_ht_cap_flags);
1930 /* Note: country IE parsing is done for us by cfg80211 */
1931 if (elems.country_elem) {
1932 /* TODO: IBSS also needs this */
1933 if (elems.pwr_constr_elem)
1934 ieee80211_handle_pwr_constr(sdata,
1935 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1936 elems.pwr_constr_elem,
1937 elems.pwr_constr_elem_len);
1940 ieee80211_bss_info_change_notify(sdata, changed);
1943 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1944 struct sk_buff *skb)
1946 struct ieee80211_local *local = sdata->local;
1947 struct ieee80211_mgmt *mgmt;
1951 return RX_DROP_MONITOR;
1953 mgmt = (struct ieee80211_mgmt *) skb->data;
1954 fc = le16_to_cpu(mgmt->frame_control);
1956 switch (fc & IEEE80211_FCTL_STYPE) {
1957 case IEEE80211_STYPE_PROBE_RESP:
1958 case IEEE80211_STYPE_BEACON:
1959 case IEEE80211_STYPE_AUTH:
1960 case IEEE80211_STYPE_ASSOC_RESP:
1961 case IEEE80211_STYPE_REASSOC_RESP:
1962 case IEEE80211_STYPE_DEAUTH:
1963 case IEEE80211_STYPE_DISASSOC:
1964 case IEEE80211_STYPE_ACTION:
1965 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1966 ieee80211_queue_work(&local->hw, &sdata->u.mgd.work);
1970 return RX_DROP_MONITOR;
1973 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1974 struct sk_buff *skb)
1976 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1977 struct ieee80211_rx_status *rx_status;
1978 struct ieee80211_mgmt *mgmt;
1979 struct ieee80211_mgd_work *wk;
1980 enum rx_mgmt_action rma = RX_MGMT_NONE;
1983 rx_status = (struct ieee80211_rx_status *) skb->cb;
1984 mgmt = (struct ieee80211_mgmt *) skb->data;
1985 fc = le16_to_cpu(mgmt->frame_control);
1987 mutex_lock(&ifmgd->mtx);
1989 if (ifmgd->associated &&
1990 memcmp(ifmgd->associated->cbss.bssid, mgmt->bssid,
1992 switch (fc & IEEE80211_FCTL_STYPE) {
1993 case IEEE80211_STYPE_BEACON:
1994 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1997 case IEEE80211_STYPE_PROBE_RESP:
1998 ieee80211_rx_mgmt_probe_resp(sdata, NULL, mgmt,
1999 skb->len, rx_status);
2001 case IEEE80211_STYPE_DEAUTH:
2002 rma = ieee80211_rx_mgmt_deauth(sdata, NULL,
2005 case IEEE80211_STYPE_DISASSOC:
2006 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2008 case IEEE80211_STYPE_ACTION:
2009 /* XXX: differentiate, can only happen for CSA now! */
2010 ieee80211_sta_process_chanswitch(sdata,
2011 &mgmt->u.action.u.chan_switch.sw_elem,
2015 mutex_unlock(&ifmgd->mtx);
2021 case RX_MGMT_CFG80211_DEAUTH:
2022 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
2024 case RX_MGMT_CFG80211_DISASSOC:
2025 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2028 WARN(1, "unexpected: %d", rma);
2033 list_for_each_entry(wk, &ifmgd->work_list, list) {
2034 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
2037 switch (fc & IEEE80211_FCTL_STYPE) {
2038 case IEEE80211_STYPE_PROBE_RESP:
2039 ieee80211_rx_mgmt_probe_resp(sdata, wk, mgmt, skb->len,
2042 case IEEE80211_STYPE_AUTH:
2043 rma = ieee80211_rx_mgmt_auth(sdata, wk, mgmt, skb->len);
2045 case IEEE80211_STYPE_ASSOC_RESP:
2046 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
2049 case IEEE80211_STYPE_REASSOC_RESP:
2050 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
2053 case IEEE80211_STYPE_DEAUTH:
2054 rma = ieee80211_rx_mgmt_deauth(sdata, wk, mgmt,
2059 * We've processed this frame for that work, so it can't
2060 * belong to another work struct.
2061 * NB: this is also required for correctness because the
2062 * called functions can free 'wk', and for 'rma'!
2067 mutex_unlock(&ifmgd->mtx);
2073 case RX_MGMT_CFG80211_AUTH:
2074 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, skb->len);
2076 case RX_MGMT_CFG80211_ASSOC:
2077 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, skb->len);
2079 case RX_MGMT_CFG80211_DEAUTH:
2080 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
2082 case RX_MGMT_CFG80211_ASSOC_ERROR:
2083 /* an internal error -- pretend timeout for now */
2084 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2087 WARN(1, "unexpected: %d", rma);
2094 static void ieee80211_sta_timer(unsigned long data)
2096 struct ieee80211_sub_if_data *sdata =
2097 (struct ieee80211_sub_if_data *) data;
2098 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2099 struct ieee80211_local *local = sdata->local;
2101 if (local->quiescing) {
2102 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2106 ieee80211_queue_work(&local->hw, &ifmgd->work);
2109 static void ieee80211_sta_work(struct work_struct *work)
2111 struct ieee80211_sub_if_data *sdata =
2112 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
2113 struct ieee80211_local *local = sdata->local;
2114 struct ieee80211_if_managed *ifmgd;
2115 struct sk_buff *skb;
2116 struct ieee80211_mgd_work *wk, *tmp;
2117 LIST_HEAD(free_work);
2118 enum rx_mgmt_action rma;
2119 bool anybusy = false;
2121 if (!netif_running(sdata->dev))
2124 if (local->scanning)
2127 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2131 * ieee80211_queue_work() should have picked up most cases,
2132 * here we'll pick the the rest.
2134 if (WARN(local->suspended, "STA MLME work scheduled while "
2135 "going to suspend\n"))
2138 ifmgd = &sdata->u.mgd;
2140 /* first process frames to avoid timing out while a frame is pending */
2141 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
2142 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2144 /* then process the rest of the work */
2145 mutex_lock(&ifmgd->mtx);
2147 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2148 IEEE80211_STA_CONNECTION_POLL) &&
2149 ifmgd->associated) {
2152 memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN);
2153 if (time_is_after_jiffies(ifmgd->probe_timeout))
2154 run_again(ifmgd, ifmgd->probe_timeout);
2156 else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) {
2157 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2158 printk(KERN_DEBUG "No probe response from AP %pM"
2159 " after %dms, try %d\n", bssid,
2160 (1000 * IEEE80211_PROBE_WAIT)/HZ,
2161 ifmgd->probe_send_count);
2163 ieee80211_mgd_probe_ap_send(sdata);
2166 * We actually lost the connection ... or did we?
2169 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2170 IEEE80211_STA_BEACON_POLL);
2171 printk(KERN_DEBUG "No probe response from AP %pM"
2172 " after %dms, disconnecting.\n",
2173 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
2174 ieee80211_set_disassoc(sdata, true);
2175 ieee80211_recalc_idle(local);
2176 mutex_unlock(&ifmgd->mtx);
2178 * must be outside lock due to cfg80211,
2179 * but that's not a problem.
2181 ieee80211_send_deauth_disassoc(sdata, bssid,
2182 IEEE80211_STYPE_DEAUTH,
2183 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2185 mutex_lock(&ifmgd->mtx);
2190 ieee80211_recalc_idle(local);
2192 list_for_each_entry_safe(wk, tmp, &ifmgd->work_list, list) {
2193 if (time_is_after_jiffies(wk->timeout)) {
2195 * This work item isn't supposed to be worked on
2196 * right now, but take care to adjust the timer
2199 run_again(ifmgd, wk->timeout);
2203 switch (wk->state) {
2207 case IEEE80211_MGD_STATE_IDLE:
2211 case IEEE80211_MGD_STATE_PROBE:
2212 rma = ieee80211_direct_probe(sdata, wk);
2214 case IEEE80211_MGD_STATE_AUTH:
2215 rma = ieee80211_authenticate(sdata, wk);
2217 case IEEE80211_MGD_STATE_ASSOC:
2218 rma = ieee80211_associate(sdata, wk);
2224 /* no action required */
2226 case RX_MGMT_CFG80211_AUTH_TO:
2227 case RX_MGMT_CFG80211_ASSOC_TO:
2228 list_del(&wk->list);
2229 list_add(&wk->list, &free_work);
2230 wk->tries = rma; /* small abuse but only local */
2233 WARN(1, "unexpected: %d", rma);
2237 list_for_each_entry(wk, &ifmgd->work_list, list) {
2238 if (wk->state != IEEE80211_MGD_STATE_IDLE) {
2244 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request))
2245 ieee80211_queue_delayed_work(&local->hw,
2247 round_jiffies_relative(0));
2249 mutex_unlock(&ifmgd->mtx);
2251 list_for_each_entry_safe(wk, tmp, &free_work, list) {
2252 switch (wk->tries) {
2253 case RX_MGMT_CFG80211_AUTH_TO:
2254 cfg80211_send_auth_timeout(sdata->dev,
2255 wk->bss->cbss.bssid);
2257 case RX_MGMT_CFG80211_ASSOC_TO:
2258 cfg80211_send_assoc_timeout(sdata->dev,
2259 wk->bss->cbss.bssid);
2262 WARN(1, "unexpected: %d", wk->tries);
2265 list_del(&wk->list);
2269 ieee80211_recalc_idle(local);
2272 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2274 struct ieee80211_sub_if_data *sdata =
2275 (struct ieee80211_sub_if_data *) data;
2276 struct ieee80211_local *local = sdata->local;
2278 if (local->quiescing)
2281 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work);
2284 static void ieee80211_sta_conn_mon_timer(unsigned long data)
2286 struct ieee80211_sub_if_data *sdata =
2287 (struct ieee80211_sub_if_data *) data;
2288 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2289 struct ieee80211_local *local = sdata->local;
2291 if (local->quiescing)
2294 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
2297 static void ieee80211_sta_monitor_work(struct work_struct *work)
2299 struct ieee80211_sub_if_data *sdata =
2300 container_of(work, struct ieee80211_sub_if_data,
2301 u.mgd.monitor_work);
2303 ieee80211_mgd_probe_ap(sdata, false);
2306 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2308 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2309 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2310 IEEE80211_STA_CONNECTION_POLL);
2312 /* let's probe the connection once */
2313 ieee80211_queue_work(&sdata->local->hw,
2314 &sdata->u.mgd.monitor_work);
2315 /* and do all the other regular work too */
2316 ieee80211_queue_work(&sdata->local->hw,
2317 &sdata->u.mgd.work);
2322 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2324 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2327 * we need to use atomic bitops for the running bits
2328 * only because both timers might fire at the same
2329 * time -- the code here is properly synchronised.
2332 cancel_work_sync(&ifmgd->work);
2333 cancel_work_sync(&ifmgd->beacon_loss_work);
2334 if (del_timer_sync(&ifmgd->timer))
2335 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2337 cancel_work_sync(&ifmgd->chswitch_work);
2338 if (del_timer_sync(&ifmgd->chswitch_timer))
2339 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
2341 cancel_work_sync(&ifmgd->monitor_work);
2342 /* these will just be re-established on connection */
2343 del_timer_sync(&ifmgd->conn_mon_timer);
2344 del_timer_sync(&ifmgd->bcn_mon_timer);
2347 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2349 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2351 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2352 add_timer(&ifmgd->timer);
2353 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2354 add_timer(&ifmgd->chswitch_timer);
2358 /* interface setup */
2359 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2361 struct ieee80211_if_managed *ifmgd;
2363 ifmgd = &sdata->u.mgd;
2364 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
2365 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
2366 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
2367 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
2368 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
2369 (unsigned long) sdata);
2370 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2371 (unsigned long) sdata);
2372 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2373 (unsigned long) sdata);
2374 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
2375 (unsigned long) sdata);
2376 skb_queue_head_init(&ifmgd->skb_queue);
2378 INIT_LIST_HEAD(&ifmgd->work_list);
2380 ifmgd->capab = WLAN_CAPABILITY_ESS;
2382 if (sdata->local->hw.queues >= 4)
2383 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
2385 mutex_init(&ifmgd->mtx);
2387 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2388 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2390 ifmgd->req_smps = IEEE80211_SMPS_OFF;
2393 /* scan finished notification */
2394 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2396 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2398 /* Restart STA timers */
2400 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2401 ieee80211_restart_sta_timer(sdata);
2405 int ieee80211_max_network_latency(struct notifier_block *nb,
2406 unsigned long data, void *dummy)
2408 s32 latency_usec = (s32) data;
2409 struct ieee80211_local *local =
2410 container_of(nb, struct ieee80211_local,
2411 network_latency_notifier);
2413 mutex_lock(&local->iflist_mtx);
2414 ieee80211_recalc_ps(local, latency_usec);
2415 mutex_unlock(&local->iflist_mtx);
2421 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2422 struct cfg80211_auth_request *req)
2424 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2426 struct ieee80211_mgd_work *wk;
2429 switch (req->auth_type) {
2430 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2431 auth_alg = WLAN_AUTH_OPEN;
2433 case NL80211_AUTHTYPE_SHARED_KEY:
2434 auth_alg = WLAN_AUTH_SHARED_KEY;
2436 case NL80211_AUTHTYPE_FT:
2437 auth_alg = WLAN_AUTH_FT;
2439 case NL80211_AUTHTYPE_NETWORK_EAP:
2440 auth_alg = WLAN_AUTH_LEAP;
2446 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2450 wk->bss = (void *)req->bss;
2452 if (req->ie && req->ie_len) {
2453 memcpy(wk->ie, req->ie, req->ie_len);
2454 wk->ie_len = req->ie_len;
2457 if (req->key && req->key_len) {
2458 wk->key_len = req->key_len;
2459 wk->key_idx = req->key_idx;
2460 memcpy(wk->key, req->key, req->key_len);
2463 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2464 memcpy(wk->ssid, ssid + 2, ssid[1]);
2465 wk->ssid_len = ssid[1];
2467 wk->state = IEEE80211_MGD_STATE_PROBE;
2468 wk->auth_alg = auth_alg;
2469 wk->timeout = jiffies; /* run right away */
2472 * XXX: if still associated need to tell AP that we're going
2473 * to sleep and then change channel etc.
2475 sdata->local->oper_channel = req->bss->channel;
2476 ieee80211_hw_config(sdata->local, 0);
2478 mutex_lock(&ifmgd->mtx);
2479 list_add(&wk->list, &sdata->u.mgd.work_list);
2480 mutex_unlock(&ifmgd->mtx);
2482 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.work);
2486 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2487 struct cfg80211_assoc_request *req)
2489 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2490 struct ieee80211_mgd_work *wk, *found = NULL;
2493 mutex_lock(&ifmgd->mtx);
2495 list_for_each_entry(wk, &ifmgd->work_list, list) {
2496 if (&wk->bss->cbss == req->bss &&
2497 wk->state == IEEE80211_MGD_STATE_IDLE) {
2508 list_del(&found->list);
2510 wk = krealloc(found, sizeof(*wk) + req->ie_len, GFP_KERNEL);
2512 list_add(&found->list, &ifmgd->work_list);
2517 list_add(&wk->list, &ifmgd->work_list);
2519 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
2521 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2522 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2523 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2524 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2525 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2527 sdata->local->oper_channel = req->bss->channel;
2528 ieee80211_hw_config(sdata->local, 0);
2530 if (req->ie && req->ie_len) {
2531 memcpy(wk->ie, req->ie, req->ie_len);
2532 wk->ie_len = req->ie_len;
2536 if (req->prev_bssid)
2537 memcpy(wk->prev_bssid, req->prev_bssid, ETH_ALEN);
2539 wk->state = IEEE80211_MGD_STATE_ASSOC;
2541 wk->timeout = jiffies; /* run right away */
2544 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2545 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2547 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2548 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2551 if (req->crypto.control_port)
2552 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2554 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2556 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.work);
2561 mutex_unlock(&ifmgd->mtx);
2565 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
2566 struct cfg80211_deauth_request *req,
2569 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2570 struct ieee80211_mgd_work *wk;
2571 const u8 *bssid = NULL;
2572 bool not_auth_yet = false;
2574 mutex_lock(&ifmgd->mtx);
2576 if (ifmgd->associated && &ifmgd->associated->cbss == req->bss) {
2577 bssid = req->bss->bssid;
2578 ieee80211_set_disassoc(sdata, true);
2579 } else list_for_each_entry(wk, &ifmgd->work_list, list) {
2580 if (&wk->bss->cbss == req->bss) {
2581 bssid = req->bss->bssid;
2582 if (wk->state == IEEE80211_MGD_STATE_PROBE)
2583 not_auth_yet = true;
2584 list_del(&wk->list);
2591 * If somebody requests authentication and we haven't
2592 * sent out an auth frame yet there's no need to send
2593 * out a deauth frame either. If the state was PROBE,
2594 * then this is the case. If it's AUTH we have sent a
2595 * frame, and if it's IDLE we have completed the auth
2599 mutex_unlock(&ifmgd->mtx);
2600 __cfg80211_auth_canceled(sdata->dev, bssid);
2605 * cfg80211 should catch this ... but it's racy since
2606 * we can receive a deauth frame, process it, hand it
2607 * to cfg80211 while that's in a locked section already
2608 * trying to tell us that the user wants to disconnect.
2611 mutex_unlock(&ifmgd->mtx);
2615 mutex_unlock(&ifmgd->mtx);
2617 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
2618 sdata->name, bssid, req->reason_code);
2620 ieee80211_send_deauth_disassoc(sdata, bssid,
2621 IEEE80211_STYPE_DEAUTH, req->reason_code,
2624 ieee80211_recalc_idle(sdata->local);
2629 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
2630 struct cfg80211_disassoc_request *req,
2633 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2635 mutex_lock(&ifmgd->mtx);
2638 * cfg80211 should catch this ... but it's racy since
2639 * we can receive a disassoc frame, process it, hand it
2640 * to cfg80211 while that's in a locked section already
2641 * trying to tell us that the user wants to disconnect.
2643 if (&ifmgd->associated->cbss != req->bss) {
2644 mutex_unlock(&ifmgd->mtx);
2648 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
2649 sdata->name, req->bss->bssid, req->reason_code);
2651 ieee80211_set_disassoc(sdata, false);
2653 mutex_unlock(&ifmgd->mtx);
2655 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
2656 IEEE80211_STYPE_DISASSOC, req->reason_code,
2659 ieee80211_recalc_idle(sdata->local);