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