2 * mac80211 work implementation
4 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
5 * Copyright 2004, Instant802 Networks, Inc.
6 * Copyright 2005, Devicescape Software, Inc.
7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * Copyright 2009, Johannes Berg <johannes@sipsolutions.net>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
16 #include <linux/delay.h>
17 #include <linux/if_ether.h>
18 #include <linux/skbuff.h>
19 #include <linux/if_arp.h>
20 #include <linux/etherdevice.h>
21 #include <linux/crc32.h>
22 #include <net/mac80211.h>
23 #include <asm/unaligned.h>
25 #include "ieee80211_i.h"
28 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
29 #define IEEE80211_AUTH_MAX_TRIES 3
30 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
31 #define IEEE80211_ASSOC_MAX_TRIES 3
32 #define IEEE80211_MAX_PROBE_TRIES 5
42 static inline void ASSERT_WORK_MTX(struct ieee80211_local *local)
44 WARN_ON(!mutex_is_locked(&local->work_mtx));
48 * We can have multiple work items (and connection probing)
49 * scheduling this timer, but we need to take care to only
50 * reschedule it when it should fire _earlier_ than it was
51 * asked for before, or if it's not pending right now. This
52 * function ensures that. Note that it then is required to
53 * run this function for all timeouts after the first one
54 * has happened -- the work that runs from this timer will
57 static void run_again(struct ieee80211_local *local,
58 unsigned long timeout)
60 ASSERT_WORK_MTX(local);
62 if (!timer_pending(&local->work_timer) ||
63 time_before(timeout, local->work_timer.expires))
64 mod_timer(&local->work_timer, timeout);
67 static void work_free_rcu(struct rcu_head *head)
69 struct ieee80211_work *wk =
70 container_of(head, struct ieee80211_work, rcu_head);
75 void free_work(struct ieee80211_work *wk)
77 call_rcu(&wk->rcu_head, work_free_rcu);
80 static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
81 struct ieee80211_supported_band *sband,
87 for (i = 0; i < supp_rates_len; i++) {
88 int rate = (supp_rates[i] & 0x7F) * 5;
90 for (j = 0; j < sband->n_bitrates; j++)
91 if (sband->bitrates[j].bitrate == rate) {
101 /* frame sending functions */
103 static void ieee80211_add_ht_ie(struct sk_buff *skb, const u8 *ht_info_ie,
104 struct ieee80211_supported_band *sband,
105 struct ieee80211_channel *channel,
106 enum ieee80211_smps_mode smps)
108 struct ieee80211_ht_info *ht_info;
110 u32 flags = channel->flags;
111 u16 cap = sband->ht_cap.cap;
114 if (!sband->ht_cap.ht_supported)
120 if (ht_info_ie[1] < sizeof(struct ieee80211_ht_info))
123 ht_info = (struct ieee80211_ht_info *)(ht_info_ie + 2);
125 /* determine capability flags */
127 if (ieee80211_disable_40mhz_24ghz &&
128 sband->band == IEEE80211_BAND_2GHZ) {
129 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
130 cap &= ~IEEE80211_HT_CAP_SGI_40;
133 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
134 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
135 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
136 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
137 cap &= ~IEEE80211_HT_CAP_SGI_40;
140 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
141 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
142 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
143 cap &= ~IEEE80211_HT_CAP_SGI_40;
148 /* set SM PS mode properly */
149 cap &= ~IEEE80211_HT_CAP_SM_PS;
151 case IEEE80211_SMPS_AUTOMATIC:
152 case IEEE80211_SMPS_NUM_MODES:
154 case IEEE80211_SMPS_OFF:
155 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
156 IEEE80211_HT_CAP_SM_PS_SHIFT;
158 case IEEE80211_SMPS_STATIC:
159 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
160 IEEE80211_HT_CAP_SM_PS_SHIFT;
162 case IEEE80211_SMPS_DYNAMIC:
163 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
164 IEEE80211_HT_CAP_SM_PS_SHIFT;
168 /* reserve and fill IE */
170 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
171 *pos++ = WLAN_EID_HT_CAPABILITY;
172 *pos++ = sizeof(struct ieee80211_ht_cap);
173 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
175 /* capability flags */
176 tmp = cpu_to_le16(cap);
177 memcpy(pos, &tmp, sizeof(u16));
180 /* AMPDU parameters */
181 *pos++ = sband->ht_cap.ampdu_factor |
182 (sband->ht_cap.ampdu_density <<
183 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
186 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
187 pos += sizeof(sband->ht_cap.mcs);
189 /* extended capabilities */
190 pos += sizeof(__le16);
192 /* BF capabilities */
193 pos += sizeof(__le32);
195 /* antenna selection */
199 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
200 struct ieee80211_work *wk)
202 struct ieee80211_local *local = sdata->local;
204 struct ieee80211_mgmt *mgmt;
207 size_t offset = 0, noffset;
208 int i, len, count, rates_len, supp_rates_len;
210 struct ieee80211_supported_band *sband;
213 sband = local->hw.wiphy->bands[wk->chan->band];
216 * Get all rates supported by the device and the AP as
217 * some APs don't like getting a superset of their rates
218 * in the association request (e.g. D-Link DAP 1353 in
221 rates_len = ieee80211_compatible_rates(wk->assoc.supp_rates,
222 wk->assoc.supp_rates_len,
225 skb = alloc_skb(local->hw.extra_tx_headroom +
226 sizeof(*mgmt) + /* bit too much but doesn't matter */
227 2 + wk->assoc.ssid_len + /* SSID */
228 4 + rates_len + /* (extended) rates */
229 4 + /* power capability */
230 2 + 2 * sband->n_channels + /* supported channels */
231 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
232 wk->ie_len + /* extra IEs */
236 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
237 "frame\n", sdata->name);
240 skb_reserve(skb, local->hw.extra_tx_headroom);
242 capab = WLAN_CAPABILITY_ESS;
244 if (sband->band == IEEE80211_BAND_2GHZ) {
245 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
246 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
247 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
248 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
251 if (wk->assoc.capability & WLAN_CAPABILITY_PRIVACY)
252 capab |= WLAN_CAPABILITY_PRIVACY;
254 if ((wk->assoc.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
255 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
256 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
258 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
260 memcpy(mgmt->da, wk->filter_ta, ETH_ALEN);
261 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
262 memcpy(mgmt->bssid, wk->filter_ta, ETH_ALEN);
264 if (!is_zero_ether_addr(wk->assoc.prev_bssid)) {
266 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
267 IEEE80211_STYPE_REASSOC_REQ);
268 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
269 mgmt->u.reassoc_req.listen_interval =
270 cpu_to_le16(local->hw.conf.listen_interval);
271 memcpy(mgmt->u.reassoc_req.current_ap, wk->assoc.prev_bssid,
275 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
276 IEEE80211_STYPE_ASSOC_REQ);
277 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
278 mgmt->u.assoc_req.listen_interval =
279 cpu_to_le16(local->hw.conf.listen_interval);
283 ies = pos = skb_put(skb, 2 + wk->assoc.ssid_len);
284 *pos++ = WLAN_EID_SSID;
285 *pos++ = wk->assoc.ssid_len;
286 memcpy(pos, wk->assoc.ssid, wk->assoc.ssid_len);
288 /* add all rates which were marked to be used above */
289 supp_rates_len = rates_len;
290 if (supp_rates_len > 8)
293 len = sband->n_bitrates;
294 pos = skb_put(skb, supp_rates_len + 2);
295 *pos++ = WLAN_EID_SUPP_RATES;
296 *pos++ = supp_rates_len;
299 for (i = 0; i < sband->n_bitrates; i++) {
300 if (BIT(i) & rates) {
301 int rate = sband->bitrates[i].bitrate;
302 *pos++ = (u8) (rate / 5);
308 if (rates_len > count) {
309 pos = skb_put(skb, rates_len - count + 2);
310 *pos++ = WLAN_EID_EXT_SUPP_RATES;
311 *pos++ = rates_len - count;
313 for (i++; i < sband->n_bitrates; i++) {
314 if (BIT(i) & rates) {
315 int rate = sband->bitrates[i].bitrate;
316 *pos++ = (u8) (rate / 5);
321 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
322 /* 1. power capabilities */
323 pos = skb_put(skb, 4);
324 *pos++ = WLAN_EID_PWR_CAPABILITY;
326 *pos++ = 0; /* min tx power */
327 *pos++ = wk->chan->max_power; /* max tx power */
329 /* 2. supported channels */
330 /* TODO: get this in reg domain format */
331 pos = skb_put(skb, 2 * sband->n_channels + 2);
332 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
333 *pos++ = 2 * sband->n_channels;
334 for (i = 0; i < sband->n_channels; i++) {
335 *pos++ = ieee80211_frequency_to_channel(
336 sband->channels[i].center_freq);
337 *pos++ = 1; /* one channel in the subband*/
341 /* if present, add any custom IEs that go before HT */
342 if (wk->ie_len && wk->ie) {
343 static const u8 before_ht[] = {
346 WLAN_EID_EXT_SUPP_RATES,
347 WLAN_EID_PWR_CAPABILITY,
348 WLAN_EID_SUPPORTED_CHANNELS,
351 WLAN_EID_RRM_ENABLED_CAPABILITIES,
352 WLAN_EID_MOBILITY_DOMAIN,
353 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
355 noffset = ieee80211_ie_split(wk->ie, wk->ie_len,
356 before_ht, ARRAY_SIZE(before_ht),
358 pos = skb_put(skb, noffset - offset);
359 memcpy(pos, wk->ie + offset, noffset - offset);
363 if (wk->assoc.use_11n && wk->assoc.wmm_used &&
364 local->hw.queues >= 4)
365 ieee80211_add_ht_ie(skb, wk->assoc.ht_information_ie,
366 sband, wk->chan, wk->assoc.smps);
368 /* if present, add any custom non-vendor IEs that go after HT */
369 if (wk->ie_len && wk->ie) {
370 noffset = ieee80211_ie_split_vendor(wk->ie, wk->ie_len,
372 pos = skb_put(skb, noffset - offset);
373 memcpy(pos, wk->ie + offset, noffset - offset);
377 if (wk->assoc.wmm_used && local->hw.queues >= 4) {
378 pos = skb_put(skb, 9);
379 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
380 *pos++ = 7; /* len */
381 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
384 *pos++ = 2; /* WME */
385 *pos++ = 0; /* WME info */
386 *pos++ = 1; /* WME ver */
390 /* add any remaining custom (i.e. vendor specific here) IEs */
391 if (wk->ie_len && wk->ie) {
392 noffset = wk->ie_len;
393 pos = skb_put(skb, noffset - offset);
394 memcpy(pos, wk->ie + offset, noffset - offset);
397 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
398 ieee80211_tx_skb(sdata, skb);
401 static void ieee80211_remove_auth_bss(struct ieee80211_local *local,
402 struct ieee80211_work *wk)
404 struct cfg80211_bss *cbss;
405 u16 capa_val = WLAN_CAPABILITY_ESS;
407 if (wk->probe_auth.privacy)
408 capa_val |= WLAN_CAPABILITY_PRIVACY;
410 cbss = cfg80211_get_bss(local->hw.wiphy, wk->chan, wk->filter_ta,
411 wk->probe_auth.ssid, wk->probe_auth.ssid_len,
412 WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY,
417 cfg80211_unlink_bss(local->hw.wiphy, cbss);
418 cfg80211_put_bss(cbss);
421 static enum work_action __must_check
422 ieee80211_direct_probe(struct ieee80211_work *wk)
424 struct ieee80211_sub_if_data *sdata = wk->sdata;
425 struct ieee80211_local *local = sdata->local;
427 wk->probe_auth.tries++;
428 if (wk->probe_auth.tries > IEEE80211_AUTH_MAX_TRIES) {
429 printk(KERN_DEBUG "%s: direct probe to %pM timed out\n",
430 sdata->name, wk->filter_ta);
433 * Most likely AP is not in the range so remove the
434 * bss struct for that AP.
436 ieee80211_remove_auth_bss(local, wk);
439 * We might have a pending scan which had no chance to run yet
440 * due to work needing to be done. Hence, queue the STAs work
443 ieee80211_queue_work(&local->hw, &local->work_work);
444 return WORK_ACT_TIMEOUT;
447 printk(KERN_DEBUG "%s: direct probe to %pM (try %d)\n",
448 sdata->name, wk->filter_ta, wk->probe_auth.tries);
451 * Direct probe is sent to broadcast address as some APs
452 * will not answer to direct packet in unassociated state.
454 ieee80211_send_probe_req(sdata, NULL, wk->probe_auth.ssid,
455 wk->probe_auth.ssid_len, NULL, 0);
457 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
458 run_again(local, wk->timeout);
460 return WORK_ACT_NONE;
464 static enum work_action __must_check
465 ieee80211_authenticate(struct ieee80211_work *wk)
467 struct ieee80211_sub_if_data *sdata = wk->sdata;
468 struct ieee80211_local *local = sdata->local;
470 wk->probe_auth.tries++;
471 if (wk->probe_auth.tries > IEEE80211_AUTH_MAX_TRIES) {
472 printk(KERN_DEBUG "%s: authentication with %pM"
473 " timed out\n", sdata->name, wk->filter_ta);
476 * Most likely AP is not in the range so remove the
477 * bss struct for that AP.
479 ieee80211_remove_auth_bss(local, wk);
482 * We might have a pending scan which had no chance to run yet
483 * due to work needing to be done. Hence, queue the STAs work
486 ieee80211_queue_work(&local->hw, &local->work_work);
487 return WORK_ACT_TIMEOUT;
490 printk(KERN_DEBUG "%s: authenticate with %pM (try %d)\n",
491 sdata->name, wk->filter_ta, wk->probe_auth.tries);
493 ieee80211_send_auth(sdata, 1, wk->probe_auth.algorithm, wk->ie,
494 wk->ie_len, wk->filter_ta, NULL, 0, 0);
495 wk->probe_auth.transaction = 2;
497 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
498 run_again(local, wk->timeout);
500 return WORK_ACT_NONE;
503 static enum work_action __must_check
504 ieee80211_associate(struct ieee80211_work *wk)
506 struct ieee80211_sub_if_data *sdata = wk->sdata;
507 struct ieee80211_local *local = sdata->local;
510 if (wk->assoc.tries > IEEE80211_ASSOC_MAX_TRIES) {
511 printk(KERN_DEBUG "%s: association with %pM"
513 sdata->name, wk->filter_ta);
516 * Most likely AP is not in the range so remove the
517 * bss struct for that AP.
520 cfg80211_unlink_bss(local->hw.wiphy, wk->assoc.bss);
523 * We might have a pending scan which had no chance to run yet
524 * due to work needing to be done. Hence, queue the STAs work
527 ieee80211_queue_work(&local->hw, &local->work_work);
528 return WORK_ACT_TIMEOUT;
531 printk(KERN_DEBUG "%s: associate with %pM (try %d)\n",
532 sdata->name, wk->filter_ta, wk->assoc.tries);
533 ieee80211_send_assoc(sdata, wk);
535 wk->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
536 run_again(local, wk->timeout);
538 return WORK_ACT_NONE;
541 static void ieee80211_auth_challenge(struct ieee80211_work *wk,
542 struct ieee80211_mgmt *mgmt,
545 struct ieee80211_sub_if_data *sdata = wk->sdata;
547 struct ieee802_11_elems elems;
549 pos = mgmt->u.auth.variable;
550 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
551 if (!elems.challenge)
553 ieee80211_send_auth(sdata, 3, wk->probe_auth.algorithm,
554 elems.challenge - 2, elems.challenge_len + 2,
555 wk->filter_ta, wk->probe_auth.key,
556 wk->probe_auth.key_len, wk->probe_auth.key_idx);
557 wk->probe_auth.transaction = 4;
560 static enum work_action __must_check
561 ieee80211_rx_mgmt_auth(struct ieee80211_work *wk,
562 struct ieee80211_mgmt *mgmt, size_t len)
564 u16 auth_alg, auth_transaction, status_code;
566 if (wk->type != IEEE80211_WORK_AUTH)
567 return WORK_ACT_NONE;
570 return WORK_ACT_NONE;
572 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
573 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
574 status_code = le16_to_cpu(mgmt->u.auth.status_code);
576 if (auth_alg != wk->probe_auth.algorithm ||
577 auth_transaction != wk->probe_auth.transaction)
578 return WORK_ACT_NONE;
580 if (status_code != WLAN_STATUS_SUCCESS) {
581 printk(KERN_DEBUG "%s: %pM denied authentication (status %d)\n",
582 wk->sdata->name, mgmt->sa, status_code);
583 return WORK_ACT_DONE;
586 switch (wk->probe_auth.algorithm) {
591 case WLAN_AUTH_SHARED_KEY:
592 if (wk->probe_auth.transaction != 4) {
593 ieee80211_auth_challenge(wk, mgmt, len);
594 /* need another frame */
595 return WORK_ACT_NONE;
600 return WORK_ACT_NONE;
603 printk(KERN_DEBUG "%s: authenticated\n", wk->sdata->name);
604 return WORK_ACT_DONE;
607 static enum work_action __must_check
608 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_work *wk,
609 struct ieee80211_mgmt *mgmt, size_t len,
612 struct ieee80211_sub_if_data *sdata = wk->sdata;
613 struct ieee80211_local *local = sdata->local;
614 u16 capab_info, status_code, aid;
615 struct ieee802_11_elems elems;
619 * AssocResp and ReassocResp have identical structure, so process both
620 * of them in this function.
624 return WORK_ACT_NONE;
626 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
627 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
628 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
630 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
631 "status=%d aid=%d)\n",
632 sdata->name, reassoc ? "Rea" : "A", mgmt->sa,
633 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
635 pos = mgmt->u.assoc_resp.variable;
636 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
638 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
639 elems.timeout_int && elems.timeout_int_len == 5 &&
640 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
642 tu = get_unaligned_le32(elems.timeout_int + 1);
643 ms = tu * 1024 / 1000;
644 printk(KERN_DEBUG "%s: %pM rejected association temporarily; "
645 "comeback duration %u TU (%u ms)\n",
646 sdata->name, mgmt->sa, tu, ms);
647 wk->timeout = jiffies + msecs_to_jiffies(ms);
648 if (ms > IEEE80211_ASSOC_TIMEOUT)
649 run_again(local, wk->timeout);
650 return WORK_ACT_NONE;
653 if (status_code != WLAN_STATUS_SUCCESS)
654 printk(KERN_DEBUG "%s: %pM denied association (code=%d)\n",
655 sdata->name, mgmt->sa, status_code);
657 printk(KERN_DEBUG "%s: associated\n", sdata->name);
659 return WORK_ACT_DONE;
662 static enum work_action __must_check
663 ieee80211_rx_mgmt_probe_resp(struct ieee80211_work *wk,
664 struct ieee80211_mgmt *mgmt, size_t len,
665 struct ieee80211_rx_status *rx_status)
667 struct ieee80211_sub_if_data *sdata = wk->sdata;
668 struct ieee80211_local *local = sdata->local;
671 ASSERT_WORK_MTX(local);
673 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
675 return WORK_ACT_NONE;
677 printk(KERN_DEBUG "%s: direct probe responded\n", sdata->name);
678 return WORK_ACT_DONE;
681 static void ieee80211_work_rx_queued_mgmt(struct ieee80211_local *local,
684 struct ieee80211_rx_status *rx_status;
685 struct ieee80211_mgmt *mgmt;
686 struct ieee80211_work *wk;
687 enum work_action rma = WORK_ACT_NONE;
690 rx_status = (struct ieee80211_rx_status *) skb->cb;
691 mgmt = (struct ieee80211_mgmt *) skb->data;
692 fc = le16_to_cpu(mgmt->frame_control);
694 mutex_lock(&local->work_mtx);
696 list_for_each_entry(wk, &local->work_list, list) {
697 const u8 *bssid = NULL;
700 case IEEE80211_WORK_DIRECT_PROBE:
701 case IEEE80211_WORK_AUTH:
702 case IEEE80211_WORK_ASSOC:
703 bssid = wk->filter_ta;
710 * Before queuing, we already verified mgmt->sa,
711 * so this is needed just for matching.
713 if (compare_ether_addr(bssid, mgmt->bssid))
716 switch (fc & IEEE80211_FCTL_STYPE) {
717 case IEEE80211_STYPE_PROBE_RESP:
718 rma = ieee80211_rx_mgmt_probe_resp(wk, mgmt, skb->len,
721 case IEEE80211_STYPE_AUTH:
722 rma = ieee80211_rx_mgmt_auth(wk, mgmt, skb->len);
724 case IEEE80211_STYPE_ASSOC_RESP:
725 rma = ieee80211_rx_mgmt_assoc_resp(wk, mgmt,
728 case IEEE80211_STYPE_REASSOC_RESP:
729 rma = ieee80211_rx_mgmt_assoc_resp(wk, mgmt,
736 * We've processed this frame for that work, so it can't
737 * belong to another work struct.
738 * NB: this is also required for correctness for 'rma'!
747 list_del_rcu(&wk->list);
750 WARN(1, "unexpected: %d", rma);
753 mutex_unlock(&local->work_mtx);
755 if (rma != WORK_ACT_DONE)
758 switch (wk->done(wk, skb)) {
759 case WORK_DONE_DESTROY:
762 case WORK_DONE_REQUEUE:
764 wk->timeout = jiffies; /* run again directly */
765 mutex_lock(&local->work_mtx);
766 list_add_tail(&wk->list, &local->work_list);
767 mutex_unlock(&local->work_mtx);
774 static void ieee80211_work_timer(unsigned long data)
776 struct ieee80211_local *local = (void *) data;
778 if (local->quiescing)
781 ieee80211_queue_work(&local->hw, &local->work_work);
784 static void ieee80211_work_work(struct work_struct *work)
786 struct ieee80211_local *local =
787 container_of(work, struct ieee80211_local, work_work);
789 struct ieee80211_work *wk, *tmp;
790 LIST_HEAD(free_work);
791 enum work_action rma;
797 * ieee80211_queue_work() should have picked up most cases,
798 * here we'll pick the the rest.
800 if (WARN(local->suspended, "work scheduled while going to suspend\n"))
803 /* first process frames to avoid timing out while a frame is pending */
804 while ((skb = skb_dequeue(&local->work_skb_queue)))
805 ieee80211_work_rx_queued_mgmt(local, skb);
807 ieee80211_recalc_idle(local);
809 mutex_lock(&local->work_mtx);
811 list_for_each_entry_safe(wk, tmp, &local->work_list, list) {
812 if (time_is_after_jiffies(wk->timeout)) {
814 * This work item isn't supposed to be worked on
815 * right now, but take care to adjust the timer
818 run_again(local, wk->timeout);
828 case IEEE80211_WORK_DIRECT_PROBE:
829 rma = ieee80211_direct_probe(wk);
831 case IEEE80211_WORK_AUTH:
832 rma = ieee80211_authenticate(wk);
834 case IEEE80211_WORK_ASSOC:
835 rma = ieee80211_associate(wk);
841 /* no action required */
843 case WORK_ACT_TIMEOUT:
844 list_del_rcu(&wk->list);
846 list_add(&wk->list, &free_work);
849 WARN(1, "unexpected: %d", rma);
853 if (list_empty(&local->work_list) && local->scan_req)
854 ieee80211_queue_delayed_work(&local->hw,
856 round_jiffies_relative(0));
858 mutex_unlock(&local->work_mtx);
860 list_for_each_entry_safe(wk, tmp, &free_work, list) {
867 void ieee80211_add_work(struct ieee80211_work *wk)
869 struct ieee80211_local *local;
871 if (WARN_ON(!wk->chan))
874 if (WARN_ON(!wk->sdata))
877 if (WARN_ON(!wk->done))
880 wk->timeout = jiffies;
882 local = wk->sdata->local;
883 mutex_lock(&local->work_mtx);
884 list_add_tail(&wk->list, &local->work_list);
885 mutex_unlock(&local->work_mtx);
887 ieee80211_queue_work(&local->hw, &local->work_work);
890 void ieee80211_work_init(struct ieee80211_local *local)
892 mutex_init(&local->work_mtx);
893 INIT_LIST_HEAD(&local->work_list);
894 setup_timer(&local->work_timer, ieee80211_work_timer,
895 (unsigned long)local);
896 INIT_WORK(&local->work_work, ieee80211_work_work);
897 skb_queue_head_init(&local->work_skb_queue);
900 void ieee80211_work_purge(struct ieee80211_sub_if_data *sdata)
902 struct ieee80211_local *local = sdata->local;
903 struct ieee80211_work *wk, *tmp;
905 mutex_lock(&local->work_mtx);
906 list_for_each_entry_safe(wk, tmp, &local->work_list, list) {
907 if (wk->sdata != sdata)
912 mutex_unlock(&local->work_mtx);
915 ieee80211_rx_result ieee80211_work_rx_mgmt(struct ieee80211_sub_if_data *sdata,
918 struct ieee80211_local *local = sdata->local;
919 struct ieee80211_mgmt *mgmt;
920 struct ieee80211_work *wk;
924 return RX_DROP_MONITOR;
926 mgmt = (struct ieee80211_mgmt *) skb->data;
927 fc = le16_to_cpu(mgmt->frame_control);
929 list_for_each_entry_rcu(wk, &local->work_list, list) {
930 if (sdata != wk->sdata)
932 if (compare_ether_addr(wk->filter_ta, mgmt->sa))
934 if (compare_ether_addr(wk->filter_ta, mgmt->bssid))
937 switch (fc & IEEE80211_FCTL_STYPE) {
938 case IEEE80211_STYPE_AUTH:
939 case IEEE80211_STYPE_PROBE_RESP:
940 case IEEE80211_STYPE_ASSOC_RESP:
941 case IEEE80211_STYPE_REASSOC_RESP:
942 case IEEE80211_STYPE_DEAUTH:
943 case IEEE80211_STYPE_DISASSOC:
944 skb_queue_tail(&local->work_skb_queue, skb);
945 ieee80211_queue_work(&local->hw, &local->work_work);