Commit | Line | Data |
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af6b6374 JB |
1 | /* |
2 | * mac80211 work implementation | |
3 | * | |
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> | |
10 | * | |
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. | |
14 | */ | |
15 | ||
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> | |
5a0e3ad6 | 22 | #include <linux/slab.h> |
af6b6374 JB |
23 | #include <net/mac80211.h> |
24 | #include <asm/unaligned.h> | |
25 | ||
26 | #include "ieee80211_i.h" | |
27 | #include "rate.h" | |
28 | ||
29 | #define IEEE80211_AUTH_TIMEOUT (HZ / 5) | |
30 | #define IEEE80211_AUTH_MAX_TRIES 3 | |
31 | #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) | |
32 | #define IEEE80211_ASSOC_MAX_TRIES 3 | |
33 | #define IEEE80211_MAX_PROBE_TRIES 5 | |
34 | ||
35 | enum work_action { | |
b8d92c9c | 36 | WORK_ACT_MISMATCH, |
af6b6374 JB |
37 | WORK_ACT_NONE, |
38 | WORK_ACT_TIMEOUT, | |
39 | WORK_ACT_DONE, | |
40 | }; | |
41 | ||
42 | ||
43 | /* utils */ | |
44 | static inline void ASSERT_WORK_MTX(struct ieee80211_local *local) | |
45 | { | |
a1699b75 | 46 | lockdep_assert_held(&local->mtx); |
af6b6374 JB |
47 | } |
48 | ||
49 | /* | |
50 | * We can have multiple work items (and connection probing) | |
51 | * scheduling this timer, but we need to take care to only | |
52 | * reschedule it when it should fire _earlier_ than it was | |
53 | * asked for before, or if it's not pending right now. This | |
54 | * function ensures that. Note that it then is required to | |
55 | * run this function for all timeouts after the first one | |
56 | * has happened -- the work that runs from this timer will | |
57 | * do that. | |
58 | */ | |
59 | static void run_again(struct ieee80211_local *local, | |
60 | unsigned long timeout) | |
61 | { | |
62 | ASSERT_WORK_MTX(local); | |
63 | ||
64 | if (!timer_pending(&local->work_timer) || | |
65 | time_before(timeout, local->work_timer.expires)) | |
66 | mod_timer(&local->work_timer, timeout); | |
67 | } | |
68 | ||
69 | static void work_free_rcu(struct rcu_head *head) | |
70 | { | |
71 | struct ieee80211_work *wk = | |
72 | container_of(head, struct ieee80211_work, rcu_head); | |
73 | ||
74 | kfree(wk); | |
75 | } | |
76 | ||
77 | void free_work(struct ieee80211_work *wk) | |
78 | { | |
79 | call_rcu(&wk->rcu_head, work_free_rcu); | |
80 | } | |
81 | ||
82 | static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len, | |
83 | struct ieee80211_supported_band *sband, | |
84 | u32 *rates) | |
85 | { | |
86 | int i, j, count; | |
87 | *rates = 0; | |
88 | count = 0; | |
89 | for (i = 0; i < supp_rates_len; i++) { | |
90 | int rate = (supp_rates[i] & 0x7F) * 5; | |
91 | ||
92 | for (j = 0; j < sband->n_bitrates; j++) | |
93 | if (sband->bitrates[j].bitrate == rate) { | |
94 | *rates |= BIT(j); | |
95 | count++; | |
96 | break; | |
97 | } | |
98 | } | |
99 | ||
100 | return count; | |
101 | } | |
102 | ||
103 | /* frame sending functions */ | |
104 | ||
77c8144a JB |
105 | static void ieee80211_add_ht_ie(struct sk_buff *skb, const u8 *ht_info_ie, |
106 | struct ieee80211_supported_band *sband, | |
107 | struct ieee80211_channel *channel, | |
108 | enum ieee80211_smps_mode smps) | |
109 | { | |
110 | struct ieee80211_ht_info *ht_info; | |
111 | u8 *pos; | |
112 | u32 flags = channel->flags; | |
113 | u16 cap = sband->ht_cap.cap; | |
114 | __le16 tmp; | |
115 | ||
116 | if (!sband->ht_cap.ht_supported) | |
117 | return; | |
118 | ||
119 | if (!ht_info_ie) | |
120 | return; | |
121 | ||
122 | if (ht_info_ie[1] < sizeof(struct ieee80211_ht_info)) | |
123 | return; | |
124 | ||
125 | ht_info = (struct ieee80211_ht_info *)(ht_info_ie + 2); | |
126 | ||
127 | /* determine capability flags */ | |
128 | ||
129 | if (ieee80211_disable_40mhz_24ghz && | |
130 | sband->band == IEEE80211_BAND_2GHZ) { | |
131 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
132 | cap &= ~IEEE80211_HT_CAP_SGI_40; | |
133 | } | |
134 | ||
135 | switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { | |
136 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
137 | if (flags & IEEE80211_CHAN_NO_HT40PLUS) { | |
138 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
139 | cap &= ~IEEE80211_HT_CAP_SGI_40; | |
140 | } | |
141 | break; | |
142 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: | |
143 | if (flags & IEEE80211_CHAN_NO_HT40MINUS) { | |
144 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
145 | cap &= ~IEEE80211_HT_CAP_SGI_40; | |
146 | } | |
147 | break; | |
148 | } | |
149 | ||
150 | /* set SM PS mode properly */ | |
151 | cap &= ~IEEE80211_HT_CAP_SM_PS; | |
152 | switch (smps) { | |
153 | case IEEE80211_SMPS_AUTOMATIC: | |
154 | case IEEE80211_SMPS_NUM_MODES: | |
155 | WARN_ON(1); | |
156 | case IEEE80211_SMPS_OFF: | |
157 | cap |= WLAN_HT_CAP_SM_PS_DISABLED << | |
158 | IEEE80211_HT_CAP_SM_PS_SHIFT; | |
159 | break; | |
160 | case IEEE80211_SMPS_STATIC: | |
161 | cap |= WLAN_HT_CAP_SM_PS_STATIC << | |
162 | IEEE80211_HT_CAP_SM_PS_SHIFT; | |
163 | break; | |
164 | case IEEE80211_SMPS_DYNAMIC: | |
165 | cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << | |
166 | IEEE80211_HT_CAP_SM_PS_SHIFT; | |
167 | break; | |
168 | } | |
169 | ||
170 | /* reserve and fill IE */ | |
171 | ||
172 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); | |
173 | *pos++ = WLAN_EID_HT_CAPABILITY; | |
174 | *pos++ = sizeof(struct ieee80211_ht_cap); | |
175 | memset(pos, 0, sizeof(struct ieee80211_ht_cap)); | |
176 | ||
177 | /* capability flags */ | |
178 | tmp = cpu_to_le16(cap); | |
179 | memcpy(pos, &tmp, sizeof(u16)); | |
180 | pos += sizeof(u16); | |
181 | ||
182 | /* AMPDU parameters */ | |
183 | *pos++ = sband->ht_cap.ampdu_factor | | |
184 | (sband->ht_cap.ampdu_density << | |
185 | IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT); | |
186 | ||
187 | /* MCS set */ | |
188 | memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs)); | |
189 | pos += sizeof(sband->ht_cap.mcs); | |
190 | ||
191 | /* extended capabilities */ | |
192 | pos += sizeof(__le16); | |
193 | ||
194 | /* BF capabilities */ | |
195 | pos += sizeof(__le32); | |
196 | ||
197 | /* antenna selection */ | |
198 | pos += sizeof(u8); | |
199 | } | |
200 | ||
af6b6374 JB |
201 | static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata, |
202 | struct ieee80211_work *wk) | |
203 | { | |
204 | struct ieee80211_local *local = sdata->local; | |
205 | struct sk_buff *skb; | |
206 | struct ieee80211_mgmt *mgmt; | |
ab13315a | 207 | u8 *pos, qos_info; |
77c8144a | 208 | const u8 *ies; |
8e664fb3 | 209 | size_t offset = 0, noffset; |
af6b6374 JB |
210 | int i, len, count, rates_len, supp_rates_len; |
211 | u16 capab; | |
212 | struct ieee80211_supported_band *sband; | |
213 | u32 rates = 0; | |
214 | ||
77c8144a JB |
215 | sband = local->hw.wiphy->bands[wk->chan->band]; |
216 | ||
76f27364 SG |
217 | if (wk->assoc.supp_rates_len) { |
218 | /* | |
219 | * Get all rates supported by the device and the AP as | |
220 | * some APs don't like getting a superset of their rates | |
221 | * in the association request (e.g. D-Link DAP 1353 in | |
222 | * b-only mode)... | |
223 | */ | |
224 | rates_len = ieee80211_compatible_rates(wk->assoc.supp_rates, | |
225 | wk->assoc.supp_rates_len, | |
226 | sband, &rates); | |
227 | } else { | |
228 | /* | |
229 | * In case AP not provide any supported rates information | |
230 | * before association, we send information element(s) with | |
231 | * all rates that we support. | |
232 | */ | |
233 | rates = ~0; | |
234 | rates_len = sband->n_bitrates; | |
235 | } | |
77c8144a JB |
236 | |
237 | skb = alloc_skb(local->hw.extra_tx_headroom + | |
238 | sizeof(*mgmt) + /* bit too much but doesn't matter */ | |
239 | 2 + wk->assoc.ssid_len + /* SSID */ | |
240 | 4 + rates_len + /* (extended) rates */ | |
241 | 4 + /* power capability */ | |
242 | 2 + 2 * sband->n_channels + /* supported channels */ | |
243 | 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ | |
244 | wk->ie_len + /* extra IEs */ | |
245 | 9, /* WMM */ | |
246 | GFP_KERNEL); | |
af6b6374 JB |
247 | if (!skb) { |
248 | printk(KERN_DEBUG "%s: failed to allocate buffer for assoc " | |
249 | "frame\n", sdata->name); | |
250 | return; | |
251 | } | |
252 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
253 | ||
af6b6374 JB |
254 | capab = WLAN_CAPABILITY_ESS; |
255 | ||
256 | if (sband->band == IEEE80211_BAND_2GHZ) { | |
257 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) | |
258 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; | |
259 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) | |
260 | capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; | |
261 | } | |
262 | ||
263 | if (wk->assoc.capability & WLAN_CAPABILITY_PRIVACY) | |
264 | capab |= WLAN_CAPABILITY_PRIVACY; | |
265 | ||
af6b6374 JB |
266 | if ((wk->assoc.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && |
267 | (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)) | |
268 | capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; | |
269 | ||
270 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
271 | memset(mgmt, 0, 24); | |
272 | memcpy(mgmt->da, wk->filter_ta, ETH_ALEN); | |
273 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); | |
274 | memcpy(mgmt->bssid, wk->filter_ta, ETH_ALEN); | |
275 | ||
276 | if (!is_zero_ether_addr(wk->assoc.prev_bssid)) { | |
277 | skb_put(skb, 10); | |
278 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
279 | IEEE80211_STYPE_REASSOC_REQ); | |
280 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); | |
281 | mgmt->u.reassoc_req.listen_interval = | |
282 | cpu_to_le16(local->hw.conf.listen_interval); | |
283 | memcpy(mgmt->u.reassoc_req.current_ap, wk->assoc.prev_bssid, | |
284 | ETH_ALEN); | |
285 | } else { | |
286 | skb_put(skb, 4); | |
287 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
288 | IEEE80211_STYPE_ASSOC_REQ); | |
289 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); | |
290 | mgmt->u.assoc_req.listen_interval = | |
291 | cpu_to_le16(local->hw.conf.listen_interval); | |
292 | } | |
293 | ||
294 | /* SSID */ | |
295 | ies = pos = skb_put(skb, 2 + wk->assoc.ssid_len); | |
296 | *pos++ = WLAN_EID_SSID; | |
297 | *pos++ = wk->assoc.ssid_len; | |
298 | memcpy(pos, wk->assoc.ssid, wk->assoc.ssid_len); | |
299 | ||
300 | /* add all rates which were marked to be used above */ | |
301 | supp_rates_len = rates_len; | |
302 | if (supp_rates_len > 8) | |
303 | supp_rates_len = 8; | |
304 | ||
305 | len = sband->n_bitrates; | |
306 | pos = skb_put(skb, supp_rates_len + 2); | |
307 | *pos++ = WLAN_EID_SUPP_RATES; | |
308 | *pos++ = supp_rates_len; | |
309 | ||
310 | count = 0; | |
311 | for (i = 0; i < sband->n_bitrates; i++) { | |
312 | if (BIT(i) & rates) { | |
313 | int rate = sband->bitrates[i].bitrate; | |
314 | *pos++ = (u8) (rate / 5); | |
315 | if (++count == 8) | |
316 | break; | |
317 | } | |
318 | } | |
319 | ||
320 | if (rates_len > count) { | |
321 | pos = skb_put(skb, rates_len - count + 2); | |
322 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
323 | *pos++ = rates_len - count; | |
324 | ||
325 | for (i++; i < sband->n_bitrates; i++) { | |
326 | if (BIT(i) & rates) { | |
327 | int rate = sband->bitrates[i].bitrate; | |
328 | *pos++ = (u8) (rate / 5); | |
329 | } | |
330 | } | |
331 | } | |
332 | ||
333 | if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { | |
334 | /* 1. power capabilities */ | |
335 | pos = skb_put(skb, 4); | |
336 | *pos++ = WLAN_EID_PWR_CAPABILITY; | |
337 | *pos++ = 2; | |
338 | *pos++ = 0; /* min tx power */ | |
77c8144a | 339 | *pos++ = wk->chan->max_power; /* max tx power */ |
af6b6374 JB |
340 | |
341 | /* 2. supported channels */ | |
342 | /* TODO: get this in reg domain format */ | |
343 | pos = skb_put(skb, 2 * sband->n_channels + 2); | |
344 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; | |
345 | *pos++ = 2 * sband->n_channels; | |
346 | for (i = 0; i < sband->n_channels; i++) { | |
347 | *pos++ = ieee80211_frequency_to_channel( | |
348 | sband->channels[i].center_freq); | |
349 | *pos++ = 1; /* one channel in the subband*/ | |
350 | } | |
351 | } | |
352 | ||
8e664fb3 | 353 | /* if present, add any custom IEs that go before HT */ |
af6b6374 | 354 | if (wk->ie_len && wk->ie) { |
8e664fb3 JB |
355 | static const u8 before_ht[] = { |
356 | WLAN_EID_SSID, | |
357 | WLAN_EID_SUPP_RATES, | |
358 | WLAN_EID_EXT_SUPP_RATES, | |
359 | WLAN_EID_PWR_CAPABILITY, | |
360 | WLAN_EID_SUPPORTED_CHANNELS, | |
361 | WLAN_EID_RSN, | |
362 | WLAN_EID_QOS_CAPA, | |
363 | WLAN_EID_RRM_ENABLED_CAPABILITIES, | |
364 | WLAN_EID_MOBILITY_DOMAIN, | |
365 | WLAN_EID_SUPPORTED_REGULATORY_CLASSES, | |
366 | }; | |
367 | noffset = ieee80211_ie_split(wk->ie, wk->ie_len, | |
368 | before_ht, ARRAY_SIZE(before_ht), | |
369 | offset); | |
370 | pos = skb_put(skb, noffset - offset); | |
371 | memcpy(pos, wk->ie + offset, noffset - offset); | |
372 | offset = noffset; | |
af6b6374 JB |
373 | } |
374 | ||
77c8144a JB |
375 | if (wk->assoc.use_11n && wk->assoc.wmm_used && |
376 | local->hw.queues >= 4) | |
377 | ieee80211_add_ht_ie(skb, wk->assoc.ht_information_ie, | |
378 | sband, wk->chan, wk->assoc.smps); | |
379 | ||
8e664fb3 JB |
380 | /* if present, add any custom non-vendor IEs that go after HT */ |
381 | if (wk->ie_len && wk->ie) { | |
382 | noffset = ieee80211_ie_split_vendor(wk->ie, wk->ie_len, | |
383 | offset); | |
384 | pos = skb_put(skb, noffset - offset); | |
385 | memcpy(pos, wk->ie + offset, noffset - offset); | |
386 | offset = noffset; | |
387 | } | |
388 | ||
af6b6374 | 389 | if (wk->assoc.wmm_used && local->hw.queues >= 4) { |
ab13315a | 390 | if (wk->assoc.uapsd_used) { |
50ae0cf1 KV |
391 | qos_info = local->uapsd_queues; |
392 | qos_info |= (local->uapsd_max_sp_len << | |
ab13315a KV |
393 | IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); |
394 | } else { | |
395 | qos_info = 0; | |
396 | } | |
397 | ||
af6b6374 JB |
398 | pos = skb_put(skb, 9); |
399 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
400 | *pos++ = 7; /* len */ | |
401 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ | |
402 | *pos++ = 0x50; | |
403 | *pos++ = 0xf2; | |
404 | *pos++ = 2; /* WME */ | |
405 | *pos++ = 0; /* WME info */ | |
406 | *pos++ = 1; /* WME ver */ | |
ab13315a | 407 | *pos++ = qos_info; |
af6b6374 JB |
408 | } |
409 | ||
8e664fb3 JB |
410 | /* add any remaining custom (i.e. vendor specific here) IEs */ |
411 | if (wk->ie_len && wk->ie) { | |
412 | noffset = wk->ie_len; | |
413 | pos = skb_put(skb, noffset - offset); | |
414 | memcpy(pos, wk->ie + offset, noffset - offset); | |
415 | } | |
416 | ||
af6b6374 JB |
417 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
418 | ieee80211_tx_skb(sdata, skb); | |
419 | } | |
420 | ||
421 | static void ieee80211_remove_auth_bss(struct ieee80211_local *local, | |
422 | struct ieee80211_work *wk) | |
423 | { | |
424 | struct cfg80211_bss *cbss; | |
425 | u16 capa_val = WLAN_CAPABILITY_ESS; | |
426 | ||
427 | if (wk->probe_auth.privacy) | |
428 | capa_val |= WLAN_CAPABILITY_PRIVACY; | |
429 | ||
430 | cbss = cfg80211_get_bss(local->hw.wiphy, wk->chan, wk->filter_ta, | |
431 | wk->probe_auth.ssid, wk->probe_auth.ssid_len, | |
432 | WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY, | |
433 | capa_val); | |
434 | if (!cbss) | |
435 | return; | |
436 | ||
437 | cfg80211_unlink_bss(local->hw.wiphy, cbss); | |
438 | cfg80211_put_bss(cbss); | |
439 | } | |
440 | ||
441 | static enum work_action __must_check | |
442 | ieee80211_direct_probe(struct ieee80211_work *wk) | |
443 | { | |
444 | struct ieee80211_sub_if_data *sdata = wk->sdata; | |
445 | struct ieee80211_local *local = sdata->local; | |
446 | ||
447 | wk->probe_auth.tries++; | |
448 | if (wk->probe_auth.tries > IEEE80211_AUTH_MAX_TRIES) { | |
7d3a1c3b | 449 | printk(KERN_DEBUG "%s: direct probe to %pM timed out\n", |
af6b6374 JB |
450 | sdata->name, wk->filter_ta); |
451 | ||
452 | /* | |
453 | * Most likely AP is not in the range so remove the | |
454 | * bss struct for that AP. | |
455 | */ | |
456 | ieee80211_remove_auth_bss(local, wk); | |
457 | ||
af6b6374 JB |
458 | return WORK_ACT_TIMEOUT; |
459 | } | |
460 | ||
2f886750 BG |
461 | printk(KERN_DEBUG "%s: direct probe to %pM (try %d/%i)\n", |
462 | sdata->name, wk->filter_ta, wk->probe_auth.tries, | |
463 | IEEE80211_AUTH_MAX_TRIES); | |
af6b6374 JB |
464 | |
465 | /* | |
466 | * Direct probe is sent to broadcast address as some APs | |
467 | * will not answer to direct packet in unassociated state. | |
468 | */ | |
469 | ieee80211_send_probe_req(sdata, NULL, wk->probe_auth.ssid, | |
470 | wk->probe_auth.ssid_len, NULL, 0); | |
471 | ||
472 | wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; | |
473 | run_again(local, wk->timeout); | |
474 | ||
475 | return WORK_ACT_NONE; | |
476 | } | |
477 | ||
478 | ||
479 | static enum work_action __must_check | |
480 | ieee80211_authenticate(struct ieee80211_work *wk) | |
481 | { | |
482 | struct ieee80211_sub_if_data *sdata = wk->sdata; | |
483 | struct ieee80211_local *local = sdata->local; | |
484 | ||
485 | wk->probe_auth.tries++; | |
486 | if (wk->probe_auth.tries > IEEE80211_AUTH_MAX_TRIES) { | |
7d3a1c3b | 487 | printk(KERN_DEBUG "%s: authentication with %pM" |
af6b6374 JB |
488 | " timed out\n", sdata->name, wk->filter_ta); |
489 | ||
490 | /* | |
491 | * Most likely AP is not in the range so remove the | |
492 | * bss struct for that AP. | |
493 | */ | |
494 | ieee80211_remove_auth_bss(local, wk); | |
495 | ||
af6b6374 JB |
496 | return WORK_ACT_TIMEOUT; |
497 | } | |
498 | ||
7d3a1c3b | 499 | printk(KERN_DEBUG "%s: authenticate with %pM (try %d)\n", |
af6b6374 JB |
500 | sdata->name, wk->filter_ta, wk->probe_auth.tries); |
501 | ||
502 | ieee80211_send_auth(sdata, 1, wk->probe_auth.algorithm, wk->ie, | |
503 | wk->ie_len, wk->filter_ta, NULL, 0, 0); | |
504 | wk->probe_auth.transaction = 2; | |
505 | ||
506 | wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; | |
507 | run_again(local, wk->timeout); | |
508 | ||
509 | return WORK_ACT_NONE; | |
510 | } | |
511 | ||
512 | static enum work_action __must_check | |
513 | ieee80211_associate(struct ieee80211_work *wk) | |
514 | { | |
515 | struct ieee80211_sub_if_data *sdata = wk->sdata; | |
516 | struct ieee80211_local *local = sdata->local; | |
517 | ||
518 | wk->assoc.tries++; | |
519 | if (wk->assoc.tries > IEEE80211_ASSOC_MAX_TRIES) { | |
7d3a1c3b | 520 | printk(KERN_DEBUG "%s: association with %pM" |
af6b6374 JB |
521 | " timed out\n", |
522 | sdata->name, wk->filter_ta); | |
523 | ||
524 | /* | |
525 | * Most likely AP is not in the range so remove the | |
526 | * bss struct for that AP. | |
527 | */ | |
528 | if (wk->assoc.bss) | |
0c1ad2ca | 529 | cfg80211_unlink_bss(local->hw.wiphy, wk->assoc.bss); |
af6b6374 | 530 | |
af6b6374 JB |
531 | return WORK_ACT_TIMEOUT; |
532 | } | |
533 | ||
7d3a1c3b | 534 | printk(KERN_DEBUG "%s: associate with %pM (try %d)\n", |
af6b6374 JB |
535 | sdata->name, wk->filter_ta, wk->assoc.tries); |
536 | ieee80211_send_assoc(sdata, wk); | |
537 | ||
538 | wk->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; | |
539 | run_again(local, wk->timeout); | |
540 | ||
541 | return WORK_ACT_NONE; | |
542 | } | |
543 | ||
b8bc4b0a JB |
544 | static enum work_action __must_check |
545 | ieee80211_remain_on_channel_timeout(struct ieee80211_work *wk) | |
546 | { | |
b8bc4b0a JB |
547 | /* |
548 | * First time we run, do nothing -- the generic code will | |
549 | * have switched to the right channel etc. | |
550 | */ | |
723bae7e | 551 | if (!wk->started) { |
e4da8c37 | 552 | wk->timeout = jiffies + msecs_to_jiffies(wk->remain.duration); |
b8bc4b0a | 553 | |
1990ca61 KV |
554 | cfg80211_ready_on_channel(wk->sdata->dev, (unsigned long) wk, |
555 | wk->chan, wk->chan_type, | |
556 | wk->remain.duration, GFP_KERNEL); | |
b8bc4b0a | 557 | |
e4da8c37 | 558 | return WORK_ACT_NONE; |
b8bc4b0a JB |
559 | } |
560 | ||
e4da8c37 | 561 | return WORK_ACT_TIMEOUT; |
b8bc4b0a JB |
562 | } |
563 | ||
f30221e4 JB |
564 | static enum work_action __must_check |
565 | ieee80211_offchannel_tx(struct ieee80211_work *wk) | |
566 | { | |
567 | if (!wk->started) { | |
568 | wk->timeout = jiffies + msecs_to_jiffies(wk->offchan_tx.wait); | |
569 | ||
570 | /* | |
571 | * After this, offchan_tx.frame remains but now is no | |
572 | * longer a valid pointer -- we still need it as the | |
573 | * cookie for canceling this work. | |
574 | */ | |
575 | ieee80211_tx_skb(wk->sdata, wk->offchan_tx.frame); | |
576 | ||
577 | return WORK_ACT_NONE; | |
578 | } | |
579 | ||
580 | return WORK_ACT_TIMEOUT; | |
581 | } | |
582 | ||
e5b900d2 JB |
583 | static enum work_action __must_check |
584 | ieee80211_assoc_beacon_wait(struct ieee80211_work *wk) | |
585 | { | |
586 | if (wk->started) | |
587 | return WORK_ACT_TIMEOUT; | |
588 | ||
589 | /* | |
590 | * Wait up to one beacon interval ... | |
591 | * should this be more if we miss one? | |
592 | */ | |
593 | printk(KERN_DEBUG "%s: waiting for beacon from %pM\n", | |
594 | wk->sdata->name, wk->filter_ta); | |
595 | wk->timeout = TU_TO_EXP_TIME(wk->assoc.bss->beacon_interval); | |
596 | return WORK_ACT_NONE; | |
597 | } | |
598 | ||
af6b6374 JB |
599 | static void ieee80211_auth_challenge(struct ieee80211_work *wk, |
600 | struct ieee80211_mgmt *mgmt, | |
601 | size_t len) | |
602 | { | |
603 | struct ieee80211_sub_if_data *sdata = wk->sdata; | |
604 | u8 *pos; | |
605 | struct ieee802_11_elems elems; | |
606 | ||
607 | pos = mgmt->u.auth.variable; | |
608 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
609 | if (!elems.challenge) | |
610 | return; | |
611 | ieee80211_send_auth(sdata, 3, wk->probe_auth.algorithm, | |
612 | elems.challenge - 2, elems.challenge_len + 2, | |
613 | wk->filter_ta, wk->probe_auth.key, | |
614 | wk->probe_auth.key_len, wk->probe_auth.key_idx); | |
615 | wk->probe_auth.transaction = 4; | |
616 | } | |
617 | ||
618 | static enum work_action __must_check | |
619 | ieee80211_rx_mgmt_auth(struct ieee80211_work *wk, | |
620 | struct ieee80211_mgmt *mgmt, size_t len) | |
621 | { | |
622 | u16 auth_alg, auth_transaction, status_code; | |
623 | ||
624 | if (wk->type != IEEE80211_WORK_AUTH) | |
b8d92c9c | 625 | return WORK_ACT_MISMATCH; |
af6b6374 JB |
626 | |
627 | if (len < 24 + 6) | |
628 | return WORK_ACT_NONE; | |
629 | ||
630 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
631 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
632 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
633 | ||
634 | if (auth_alg != wk->probe_auth.algorithm || | |
635 | auth_transaction != wk->probe_auth.transaction) | |
636 | return WORK_ACT_NONE; | |
637 | ||
638 | if (status_code != WLAN_STATUS_SUCCESS) { | |
639 | printk(KERN_DEBUG "%s: %pM denied authentication (status %d)\n", | |
640 | wk->sdata->name, mgmt->sa, status_code); | |
641 | return WORK_ACT_DONE; | |
642 | } | |
643 | ||
644 | switch (wk->probe_auth.algorithm) { | |
645 | case WLAN_AUTH_OPEN: | |
646 | case WLAN_AUTH_LEAP: | |
647 | case WLAN_AUTH_FT: | |
648 | break; | |
649 | case WLAN_AUTH_SHARED_KEY: | |
650 | if (wk->probe_auth.transaction != 4) { | |
651 | ieee80211_auth_challenge(wk, mgmt, len); | |
652 | /* need another frame */ | |
653 | return WORK_ACT_NONE; | |
654 | } | |
655 | break; | |
656 | default: | |
657 | WARN_ON(1); | |
658 | return WORK_ACT_NONE; | |
659 | } | |
660 | ||
661 | printk(KERN_DEBUG "%s: authenticated\n", wk->sdata->name); | |
662 | return WORK_ACT_DONE; | |
663 | } | |
664 | ||
665 | static enum work_action __must_check | |
666 | ieee80211_rx_mgmt_assoc_resp(struct ieee80211_work *wk, | |
667 | struct ieee80211_mgmt *mgmt, size_t len, | |
668 | bool reassoc) | |
669 | { | |
670 | struct ieee80211_sub_if_data *sdata = wk->sdata; | |
671 | struct ieee80211_local *local = sdata->local; | |
672 | u16 capab_info, status_code, aid; | |
673 | struct ieee802_11_elems elems; | |
674 | u8 *pos; | |
675 | ||
b8d92c9c JB |
676 | if (wk->type != IEEE80211_WORK_ASSOC) |
677 | return WORK_ACT_MISMATCH; | |
678 | ||
af6b6374 JB |
679 | /* |
680 | * AssocResp and ReassocResp have identical structure, so process both | |
681 | * of them in this function. | |
682 | */ | |
683 | ||
684 | if (len < 24 + 6) | |
685 | return WORK_ACT_NONE; | |
686 | ||
687 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
688 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
689 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
690 | ||
691 | printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x " | |
692 | "status=%d aid=%d)\n", | |
693 | sdata->name, reassoc ? "Rea" : "A", mgmt->sa, | |
694 | capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); | |
695 | ||
696 | pos = mgmt->u.assoc_resp.variable; | |
697 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
698 | ||
699 | if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && | |
700 | elems.timeout_int && elems.timeout_int_len == 5 && | |
701 | elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) { | |
702 | u32 tu, ms; | |
703 | tu = get_unaligned_le32(elems.timeout_int + 1); | |
704 | ms = tu * 1024 / 1000; | |
7d3a1c3b | 705 | printk(KERN_DEBUG "%s: %pM rejected association temporarily; " |
af6b6374 | 706 | "comeback duration %u TU (%u ms)\n", |
7d3a1c3b | 707 | sdata->name, mgmt->sa, tu, ms); |
af6b6374 JB |
708 | wk->timeout = jiffies + msecs_to_jiffies(ms); |
709 | if (ms > IEEE80211_ASSOC_TIMEOUT) | |
710 | run_again(local, wk->timeout); | |
711 | return WORK_ACT_NONE; | |
712 | } | |
713 | ||
714 | if (status_code != WLAN_STATUS_SUCCESS) | |
7d3a1c3b JB |
715 | printk(KERN_DEBUG "%s: %pM denied association (code=%d)\n", |
716 | sdata->name, mgmt->sa, status_code); | |
af6b6374 JB |
717 | else |
718 | printk(KERN_DEBUG "%s: associated\n", sdata->name); | |
719 | ||
720 | return WORK_ACT_DONE; | |
721 | } | |
722 | ||
723 | static enum work_action __must_check | |
724 | ieee80211_rx_mgmt_probe_resp(struct ieee80211_work *wk, | |
725 | struct ieee80211_mgmt *mgmt, size_t len, | |
726 | struct ieee80211_rx_status *rx_status) | |
727 | { | |
728 | struct ieee80211_sub_if_data *sdata = wk->sdata; | |
729 | struct ieee80211_local *local = sdata->local; | |
730 | size_t baselen; | |
731 | ||
732 | ASSERT_WORK_MTX(local); | |
733 | ||
b8d92c9c JB |
734 | if (wk->type != IEEE80211_WORK_DIRECT_PROBE) |
735 | return WORK_ACT_MISMATCH; | |
736 | ||
737 | if (len < 24 + 12) | |
738 | return WORK_ACT_NONE; | |
739 | ||
af6b6374 JB |
740 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
741 | if (baselen > len) | |
742 | return WORK_ACT_NONE; | |
743 | ||
744 | printk(KERN_DEBUG "%s: direct probe responded\n", sdata->name); | |
745 | return WORK_ACT_DONE; | |
746 | } | |
747 | ||
e5b900d2 JB |
748 | static enum work_action __must_check |
749 | ieee80211_rx_mgmt_beacon(struct ieee80211_work *wk, | |
750 | struct ieee80211_mgmt *mgmt, size_t len) | |
751 | { | |
752 | struct ieee80211_sub_if_data *sdata = wk->sdata; | |
753 | struct ieee80211_local *local = sdata->local; | |
754 | ||
755 | ASSERT_WORK_MTX(local); | |
756 | ||
757 | if (wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT) | |
758 | return WORK_ACT_MISMATCH; | |
759 | ||
760 | if (len < 24 + 12) | |
761 | return WORK_ACT_NONE; | |
762 | ||
763 | printk(KERN_DEBUG "%s: beacon received\n", sdata->name); | |
764 | return WORK_ACT_DONE; | |
765 | } | |
766 | ||
af6b6374 JB |
767 | static void ieee80211_work_rx_queued_mgmt(struct ieee80211_local *local, |
768 | struct sk_buff *skb) | |
769 | { | |
770 | struct ieee80211_rx_status *rx_status; | |
771 | struct ieee80211_mgmt *mgmt; | |
772 | struct ieee80211_work *wk; | |
021570e5 | 773 | enum work_action rma = WORK_ACT_NONE; |
af6b6374 JB |
774 | u16 fc; |
775 | ||
776 | rx_status = (struct ieee80211_rx_status *) skb->cb; | |
777 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
778 | fc = le16_to_cpu(mgmt->frame_control); | |
779 | ||
a1699b75 | 780 | mutex_lock(&local->mtx); |
af6b6374 JB |
781 | |
782 | list_for_each_entry(wk, &local->work_list, list) { | |
783 | const u8 *bssid = NULL; | |
784 | ||
785 | switch (wk->type) { | |
786 | case IEEE80211_WORK_DIRECT_PROBE: | |
787 | case IEEE80211_WORK_AUTH: | |
788 | case IEEE80211_WORK_ASSOC: | |
e5b900d2 | 789 | case IEEE80211_WORK_ASSOC_BEACON_WAIT: |
af6b6374 JB |
790 | bssid = wk->filter_ta; |
791 | break; | |
792 | default: | |
793 | continue; | |
794 | } | |
795 | ||
796 | /* | |
797 | * Before queuing, we already verified mgmt->sa, | |
798 | * so this is needed just for matching. | |
799 | */ | |
800 | if (compare_ether_addr(bssid, mgmt->bssid)) | |
801 | continue; | |
802 | ||
803 | switch (fc & IEEE80211_FCTL_STYPE) { | |
e5b900d2 JB |
804 | case IEEE80211_STYPE_BEACON: |
805 | rma = ieee80211_rx_mgmt_beacon(wk, mgmt, skb->len); | |
806 | break; | |
af6b6374 JB |
807 | case IEEE80211_STYPE_PROBE_RESP: |
808 | rma = ieee80211_rx_mgmt_probe_resp(wk, mgmt, skb->len, | |
809 | rx_status); | |
810 | break; | |
811 | case IEEE80211_STYPE_AUTH: | |
812 | rma = ieee80211_rx_mgmt_auth(wk, mgmt, skb->len); | |
813 | break; | |
814 | case IEEE80211_STYPE_ASSOC_RESP: | |
815 | rma = ieee80211_rx_mgmt_assoc_resp(wk, mgmt, | |
816 | skb->len, false); | |
817 | break; | |
818 | case IEEE80211_STYPE_REASSOC_RESP: | |
819 | rma = ieee80211_rx_mgmt_assoc_resp(wk, mgmt, | |
820 | skb->len, true); | |
821 | break; | |
822 | default: | |
823 | WARN_ON(1); | |
b8d92c9c | 824 | rma = WORK_ACT_NONE; |
af6b6374 | 825 | } |
b8d92c9c JB |
826 | |
827 | /* | |
828 | * We've either received an unexpected frame, or we have | |
829 | * multiple work items and need to match the frame to the | |
830 | * right one. | |
831 | */ | |
832 | if (rma == WORK_ACT_MISMATCH) | |
833 | continue; | |
834 | ||
af6b6374 JB |
835 | /* |
836 | * We've processed this frame for that work, so it can't | |
837 | * belong to another work struct. | |
838 | * NB: this is also required for correctness for 'rma'! | |
839 | */ | |
840 | break; | |
841 | } | |
842 | ||
843 | switch (rma) { | |
b8d92c9c JB |
844 | case WORK_ACT_MISMATCH: |
845 | /* ignore this unmatched frame */ | |
846 | break; | |
af6b6374 JB |
847 | case WORK_ACT_NONE: |
848 | break; | |
849 | case WORK_ACT_DONE: | |
850 | list_del_rcu(&wk->list); | |
851 | break; | |
852 | default: | |
853 | WARN(1, "unexpected: %d", rma); | |
854 | } | |
855 | ||
a1699b75 | 856 | mutex_unlock(&local->mtx); |
af6b6374 JB |
857 | |
858 | if (rma != WORK_ACT_DONE) | |
859 | goto out; | |
860 | ||
861 | switch (wk->done(wk, skb)) { | |
862 | case WORK_DONE_DESTROY: | |
863 | free_work(wk); | |
864 | break; | |
865 | case WORK_DONE_REQUEUE: | |
866 | synchronize_rcu(); | |
e4da8c37 | 867 | wk->started = false; /* restart */ |
a1699b75 | 868 | mutex_lock(&local->mtx); |
af6b6374 | 869 | list_add_tail(&wk->list, &local->work_list); |
a1699b75 | 870 | mutex_unlock(&local->mtx); |
af6b6374 JB |
871 | } |
872 | ||
873 | out: | |
874 | kfree_skb(skb); | |
875 | } | |
876 | ||
877 | static void ieee80211_work_timer(unsigned long data) | |
878 | { | |
879 | struct ieee80211_local *local = (void *) data; | |
880 | ||
881 | if (local->quiescing) | |
882 | return; | |
883 | ||
884 | ieee80211_queue_work(&local->hw, &local->work_work); | |
885 | } | |
886 | ||
887 | static void ieee80211_work_work(struct work_struct *work) | |
888 | { | |
889 | struct ieee80211_local *local = | |
890 | container_of(work, struct ieee80211_local, work_work); | |
891 | struct sk_buff *skb; | |
892 | struct ieee80211_work *wk, *tmp; | |
893 | LIST_HEAD(free_work); | |
894 | enum work_action rma; | |
e4da8c37 | 895 | bool remain_off_channel = false; |
af6b6374 JB |
896 | |
897 | if (local->scanning) | |
898 | return; | |
899 | ||
900 | /* | |
901 | * ieee80211_queue_work() should have picked up most cases, | |
77c2061d | 902 | * here we'll pick the rest. |
af6b6374 JB |
903 | */ |
904 | if (WARN(local->suspended, "work scheduled while going to suspend\n")) | |
905 | return; | |
906 | ||
907 | /* first process frames to avoid timing out while a frame is pending */ | |
908 | while ((skb = skb_dequeue(&local->work_skb_queue))) | |
909 | ieee80211_work_rx_queued_mgmt(local, skb); | |
910 | ||
a1699b75 | 911 | mutex_lock(&local->mtx); |
af6b6374 | 912 | |
7da7cc1d JB |
913 | ieee80211_recalc_idle(local); |
914 | ||
af6b6374 | 915 | list_for_each_entry_safe(wk, tmp, &local->work_list, list) { |
723bae7e JB |
916 | bool started = wk->started; |
917 | ||
e4da8c37 | 918 | /* mark work as started if it's on the current off-channel */ |
723bae7e | 919 | if (!started && local->tmp_channel && |
e4da8c37 JB |
920 | wk->chan == local->tmp_channel && |
921 | wk->chan_type == local->tmp_channel_type) { | |
723bae7e | 922 | started = true; |
81ac3462 | 923 | wk->timeout = jiffies; |
e4da8c37 JB |
924 | } |
925 | ||
723bae7e | 926 | if (!started && !local->tmp_channel) { |
e4da8c37 JB |
927 | /* |
928 | * TODO: could optimize this by leaving the | |
929 | * station vifs in awake mode if they | |
930 | * happen to be on the same channel as | |
931 | * the requested channel | |
932 | */ | |
933 | ieee80211_offchannel_stop_beaconing(local); | |
934 | ieee80211_offchannel_stop_station(local); | |
935 | ||
936 | local->tmp_channel = wk->chan; | |
937 | local->tmp_channel_type = wk->chan_type; | |
938 | ieee80211_hw_config(local, 0); | |
723bae7e | 939 | started = true; |
e4da8c37 JB |
940 | wk->timeout = jiffies; |
941 | } | |
942 | ||
943 | /* don't try to work with items that aren't started */ | |
723bae7e | 944 | if (!started) |
e4da8c37 JB |
945 | continue; |
946 | ||
af6b6374 JB |
947 | if (time_is_after_jiffies(wk->timeout)) { |
948 | /* | |
949 | * This work item isn't supposed to be worked on | |
950 | * right now, but take care to adjust the timer | |
951 | * properly. | |
952 | */ | |
953 | run_again(local, wk->timeout); | |
954 | continue; | |
955 | } | |
956 | ||
957 | switch (wk->type) { | |
958 | default: | |
959 | WARN_ON(1); | |
960 | /* nothing */ | |
961 | rma = WORK_ACT_NONE; | |
962 | break; | |
b8bc4b0a JB |
963 | case IEEE80211_WORK_ABORT: |
964 | rma = WORK_ACT_TIMEOUT; | |
0e0a2283 | 965 | break; |
af6b6374 JB |
966 | case IEEE80211_WORK_DIRECT_PROBE: |
967 | rma = ieee80211_direct_probe(wk); | |
968 | break; | |
969 | case IEEE80211_WORK_AUTH: | |
970 | rma = ieee80211_authenticate(wk); | |
971 | break; | |
972 | case IEEE80211_WORK_ASSOC: | |
973 | rma = ieee80211_associate(wk); | |
974 | break; | |
b8bc4b0a JB |
975 | case IEEE80211_WORK_REMAIN_ON_CHANNEL: |
976 | rma = ieee80211_remain_on_channel_timeout(wk); | |
977 | break; | |
f30221e4 JB |
978 | case IEEE80211_WORK_OFFCHANNEL_TX: |
979 | rma = ieee80211_offchannel_tx(wk); | |
980 | break; | |
e5b900d2 JB |
981 | case IEEE80211_WORK_ASSOC_BEACON_WAIT: |
982 | rma = ieee80211_assoc_beacon_wait(wk); | |
983 | break; | |
af6b6374 JB |
984 | } |
985 | ||
723bae7e JB |
986 | wk->started = started; |
987 | ||
af6b6374 JB |
988 | switch (rma) { |
989 | case WORK_ACT_NONE: | |
e4da8c37 JB |
990 | /* might have changed the timeout */ |
991 | run_again(local, wk->timeout); | |
af6b6374 JB |
992 | break; |
993 | case WORK_ACT_TIMEOUT: | |
994 | list_del_rcu(&wk->list); | |
995 | synchronize_rcu(); | |
996 | list_add(&wk->list, &free_work); | |
997 | break; | |
998 | default: | |
999 | WARN(1, "unexpected: %d", rma); | |
1000 | } | |
1001 | } | |
1002 | ||
e4da8c37 JB |
1003 | list_for_each_entry(wk, &local->work_list, list) { |
1004 | if (!wk->started) | |
1005 | continue; | |
1006 | if (wk->chan != local->tmp_channel) | |
1007 | continue; | |
1008 | if (wk->chan_type != local->tmp_channel_type) | |
1009 | continue; | |
1010 | remain_off_channel = true; | |
1011 | } | |
1012 | ||
1013 | if (!remain_off_channel && local->tmp_channel) { | |
1014 | local->tmp_channel = NULL; | |
1015 | ieee80211_hw_config(local, 0); | |
1016 | ieee80211_offchannel_return(local, true); | |
1017 | /* give connection some time to breathe */ | |
1018 | run_again(local, jiffies + HZ/2); | |
1019 | } | |
1020 | ||
68dd5b7a TP |
1021 | if (list_empty(&local->work_list) && local->scan_req && |
1022 | !local->scanning) | |
af6b6374 JB |
1023 | ieee80211_queue_delayed_work(&local->hw, |
1024 | &local->scan_work, | |
1025 | round_jiffies_relative(0)); | |
1026 | ||
e4da8c37 JB |
1027 | ieee80211_recalc_idle(local); |
1028 | ||
7da7cc1d JB |
1029 | mutex_unlock(&local->mtx); |
1030 | ||
af6b6374 JB |
1031 | list_for_each_entry_safe(wk, tmp, &free_work, list) { |
1032 | wk->done(wk, NULL); | |
1033 | list_del(&wk->list); | |
1034 | kfree(wk); | |
1035 | } | |
1036 | } | |
1037 | ||
1038 | void ieee80211_add_work(struct ieee80211_work *wk) | |
1039 | { | |
1040 | struct ieee80211_local *local; | |
1041 | ||
1042 | if (WARN_ON(!wk->chan)) | |
1043 | return; | |
1044 | ||
1045 | if (WARN_ON(!wk->sdata)) | |
1046 | return; | |
1047 | ||
1048 | if (WARN_ON(!wk->done)) | |
1049 | return; | |
1050 | ||
81ac3462 JB |
1051 | if (WARN_ON(!ieee80211_sdata_running(wk->sdata))) |
1052 | return; | |
1053 | ||
e4da8c37 | 1054 | wk->started = false; |
af6b6374 JB |
1055 | |
1056 | local = wk->sdata->local; | |
a1699b75 | 1057 | mutex_lock(&local->mtx); |
af6b6374 | 1058 | list_add_tail(&wk->list, &local->work_list); |
a1699b75 | 1059 | mutex_unlock(&local->mtx); |
af6b6374 JB |
1060 | |
1061 | ieee80211_queue_work(&local->hw, &local->work_work); | |
1062 | } | |
1063 | ||
1064 | void ieee80211_work_init(struct ieee80211_local *local) | |
1065 | { | |
af6b6374 JB |
1066 | INIT_LIST_HEAD(&local->work_list); |
1067 | setup_timer(&local->work_timer, ieee80211_work_timer, | |
1068 | (unsigned long)local); | |
1069 | INIT_WORK(&local->work_work, ieee80211_work_work); | |
1070 | skb_queue_head_init(&local->work_skb_queue); | |
1071 | } | |
1072 | ||
1073 | void ieee80211_work_purge(struct ieee80211_sub_if_data *sdata) | |
1074 | { | |
1075 | struct ieee80211_local *local = sdata->local; | |
b8bc4b0a | 1076 | struct ieee80211_work *wk; |
8808f641 | 1077 | bool cleanup = false; |
af6b6374 | 1078 | |
a1699b75 | 1079 | mutex_lock(&local->mtx); |
b8bc4b0a | 1080 | list_for_each_entry(wk, &local->work_list, list) { |
af6b6374 JB |
1081 | if (wk->sdata != sdata) |
1082 | continue; | |
8808f641 | 1083 | cleanup = true; |
b8bc4b0a | 1084 | wk->type = IEEE80211_WORK_ABORT; |
e4da8c37 JB |
1085 | wk->started = true; |
1086 | wk->timeout = jiffies; | |
b8bc4b0a | 1087 | } |
a1699b75 | 1088 | mutex_unlock(&local->mtx); |
b8bc4b0a JB |
1089 | |
1090 | /* run cleanups etc. */ | |
8808f641 HRK |
1091 | if (cleanup) |
1092 | ieee80211_work_work(&local->work_work); | |
b8bc4b0a | 1093 | |
a1699b75 | 1094 | mutex_lock(&local->mtx); |
b8bc4b0a JB |
1095 | list_for_each_entry(wk, &local->work_list, list) { |
1096 | if (wk->sdata != sdata) | |
1097 | continue; | |
1098 | WARN_ON(1); | |
1099 | break; | |
af6b6374 | 1100 | } |
a1699b75 | 1101 | mutex_unlock(&local->mtx); |
af6b6374 JB |
1102 | } |
1103 | ||
1104 | ieee80211_rx_result ieee80211_work_rx_mgmt(struct ieee80211_sub_if_data *sdata, | |
1105 | struct sk_buff *skb) | |
1106 | { | |
1107 | struct ieee80211_local *local = sdata->local; | |
1108 | struct ieee80211_mgmt *mgmt; | |
1109 | struct ieee80211_work *wk; | |
1110 | u16 fc; | |
1111 | ||
1112 | if (skb->len < 24) | |
1113 | return RX_DROP_MONITOR; | |
1114 | ||
1115 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1116 | fc = le16_to_cpu(mgmt->frame_control); | |
1117 | ||
1118 | list_for_each_entry_rcu(wk, &local->work_list, list) { | |
1119 | if (sdata != wk->sdata) | |
1120 | continue; | |
1121 | if (compare_ether_addr(wk->filter_ta, mgmt->sa)) | |
1122 | continue; | |
1123 | if (compare_ether_addr(wk->filter_ta, mgmt->bssid)) | |
1124 | continue; | |
1125 | ||
1126 | switch (fc & IEEE80211_FCTL_STYPE) { | |
1127 | case IEEE80211_STYPE_AUTH: | |
1128 | case IEEE80211_STYPE_PROBE_RESP: | |
1129 | case IEEE80211_STYPE_ASSOC_RESP: | |
1130 | case IEEE80211_STYPE_REASSOC_RESP: | |
e5b900d2 | 1131 | case IEEE80211_STYPE_BEACON: |
af6b6374 JB |
1132 | skb_queue_tail(&local->work_skb_queue, skb); |
1133 | ieee80211_queue_work(&local->hw, &local->work_work); | |
1134 | return RX_QUEUED; | |
1135 | } | |
1136 | } | |
1137 | ||
1138 | return RX_CONTINUE; | |
1139 | } | |
b8bc4b0a | 1140 | |
e4da8c37 JB |
1141 | static enum work_done_result ieee80211_remain_done(struct ieee80211_work *wk, |
1142 | struct sk_buff *skb) | |
1143 | { | |
1144 | /* | |
1145 | * We are done serving the remain-on-channel command. | |
1146 | */ | |
1990ca61 | 1147 | cfg80211_remain_on_channel_expired(wk->sdata->dev, (unsigned long) wk, |
e4da8c37 JB |
1148 | wk->chan, wk->chan_type, |
1149 | GFP_KERNEL); | |
1150 | ||
1151 | return WORK_DONE_DESTROY; | |
1152 | } | |
1153 | ||
b8bc4b0a JB |
1154 | int ieee80211_wk_remain_on_channel(struct ieee80211_sub_if_data *sdata, |
1155 | struct ieee80211_channel *chan, | |
1156 | enum nl80211_channel_type channel_type, | |
1157 | unsigned int duration, u64 *cookie) | |
1158 | { | |
b8bc4b0a JB |
1159 | struct ieee80211_work *wk; |
1160 | ||
1161 | wk = kzalloc(sizeof(*wk), GFP_KERNEL); | |
1162 | if (!wk) | |
1163 | return -ENOMEM; | |
1164 | ||
1165 | wk->type = IEEE80211_WORK_REMAIN_ON_CHANNEL; | |
1166 | wk->chan = chan; | |
e4da8c37 | 1167 | wk->chan_type = channel_type; |
b8bc4b0a | 1168 | wk->sdata = sdata; |
e4da8c37 | 1169 | wk->done = ieee80211_remain_done; |
b8bc4b0a | 1170 | |
e4da8c37 | 1171 | wk->remain.duration = duration; |
b8bc4b0a | 1172 | |
1990ca61 | 1173 | *cookie = (unsigned long) wk; |
b8bc4b0a JB |
1174 | |
1175 | ieee80211_add_work(wk); | |
1176 | ||
b8bc4b0a JB |
1177 | return 0; |
1178 | } | |
1179 | ||
1180 | int ieee80211_wk_cancel_remain_on_channel(struct ieee80211_sub_if_data *sdata, | |
1181 | u64 cookie) | |
1182 | { | |
1183 | struct ieee80211_local *local = sdata->local; | |
1184 | struct ieee80211_work *wk, *tmp; | |
1185 | bool found = false; | |
1186 | ||
a1699b75 | 1187 | mutex_lock(&local->mtx); |
b8bc4b0a | 1188 | list_for_each_entry_safe(wk, tmp, &local->work_list, list) { |
1990ca61 | 1189 | if ((unsigned long) wk == cookie) { |
e4da8c37 | 1190 | wk->timeout = jiffies; |
b8bc4b0a | 1191 | found = true; |
b8bc4b0a JB |
1192 | break; |
1193 | } | |
1194 | } | |
a1699b75 | 1195 | mutex_unlock(&local->mtx); |
b8bc4b0a JB |
1196 | |
1197 | if (!found) | |
1198 | return -ENOENT; | |
1199 | ||
e4da8c37 | 1200 | ieee80211_queue_work(&local->hw, &local->work_work); |
b8bc4b0a JB |
1201 | |
1202 | return 0; | |
1203 | } |