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" | |
b2abb6e2 | 28 | #include "driver-ops.h" |
af6b6374 JB |
29 | |
30 | #define IEEE80211_AUTH_TIMEOUT (HZ / 5) | |
31 | #define IEEE80211_AUTH_MAX_TRIES 3 | |
32 | #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) | |
33 | #define IEEE80211_ASSOC_MAX_TRIES 3 | |
af6b6374 JB |
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 | ||
af6b6374 JB |
69 | void free_work(struct ieee80211_work *wk) |
70 | { | |
a74ce142 | 71 | kfree_rcu(wk, rcu_head); |
af6b6374 JB |
72 | } |
73 | ||
74 | static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len, | |
75 | struct ieee80211_supported_band *sband, | |
76 | u32 *rates) | |
77 | { | |
78 | int i, j, count; | |
79 | *rates = 0; | |
80 | count = 0; | |
81 | for (i = 0; i < supp_rates_len; i++) { | |
82 | int rate = (supp_rates[i] & 0x7F) * 5; | |
83 | ||
84 | for (j = 0; j < sband->n_bitrates; j++) | |
85 | if (sband->bitrates[j].bitrate == rate) { | |
86 | *rates |= BIT(j); | |
87 | count++; | |
88 | break; | |
89 | } | |
90 | } | |
91 | ||
92 | return count; | |
93 | } | |
94 | ||
95 | /* frame sending functions */ | |
96 | ||
77c8144a JB |
97 | static void ieee80211_add_ht_ie(struct sk_buff *skb, const u8 *ht_info_ie, |
98 | struct ieee80211_supported_band *sband, | |
99 | struct ieee80211_channel *channel, | |
100 | enum ieee80211_smps_mode smps) | |
101 | { | |
102 | struct ieee80211_ht_info *ht_info; | |
103 | u8 *pos; | |
104 | u32 flags = channel->flags; | |
105 | u16 cap = sband->ht_cap.cap; | |
106 | __le16 tmp; | |
107 | ||
108 | if (!sband->ht_cap.ht_supported) | |
109 | return; | |
110 | ||
111 | if (!ht_info_ie) | |
112 | return; | |
113 | ||
114 | if (ht_info_ie[1] < sizeof(struct ieee80211_ht_info)) | |
115 | return; | |
116 | ||
117 | ht_info = (struct ieee80211_ht_info *)(ht_info_ie + 2); | |
118 | ||
119 | /* determine capability flags */ | |
120 | ||
77c8144a JB |
121 | switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { |
122 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
123 | if (flags & IEEE80211_CHAN_NO_HT40PLUS) { | |
124 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
125 | cap &= ~IEEE80211_HT_CAP_SGI_40; | |
126 | } | |
127 | break; | |
128 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: | |
129 | if (flags & IEEE80211_CHAN_NO_HT40MINUS) { | |
130 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
131 | cap &= ~IEEE80211_HT_CAP_SGI_40; | |
132 | } | |
133 | break; | |
134 | } | |
135 | ||
136 | /* set SM PS mode properly */ | |
137 | cap &= ~IEEE80211_HT_CAP_SM_PS; | |
138 | switch (smps) { | |
139 | case IEEE80211_SMPS_AUTOMATIC: | |
140 | case IEEE80211_SMPS_NUM_MODES: | |
141 | WARN_ON(1); | |
142 | case IEEE80211_SMPS_OFF: | |
143 | cap |= WLAN_HT_CAP_SM_PS_DISABLED << | |
144 | IEEE80211_HT_CAP_SM_PS_SHIFT; | |
145 | break; | |
146 | case IEEE80211_SMPS_STATIC: | |
147 | cap |= WLAN_HT_CAP_SM_PS_STATIC << | |
148 | IEEE80211_HT_CAP_SM_PS_SHIFT; | |
149 | break; | |
150 | case IEEE80211_SMPS_DYNAMIC: | |
151 | cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << | |
152 | IEEE80211_HT_CAP_SM_PS_SHIFT; | |
153 | break; | |
154 | } | |
155 | ||
156 | /* reserve and fill IE */ | |
157 | ||
158 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); | |
159 | *pos++ = WLAN_EID_HT_CAPABILITY; | |
160 | *pos++ = sizeof(struct ieee80211_ht_cap); | |
161 | memset(pos, 0, sizeof(struct ieee80211_ht_cap)); | |
162 | ||
163 | /* capability flags */ | |
164 | tmp = cpu_to_le16(cap); | |
165 | memcpy(pos, &tmp, sizeof(u16)); | |
166 | pos += sizeof(u16); | |
167 | ||
168 | /* AMPDU parameters */ | |
169 | *pos++ = sband->ht_cap.ampdu_factor | | |
170 | (sband->ht_cap.ampdu_density << | |
171 | IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT); | |
172 | ||
173 | /* MCS set */ | |
174 | memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs)); | |
175 | pos += sizeof(sband->ht_cap.mcs); | |
176 | ||
177 | /* extended capabilities */ | |
178 | pos += sizeof(__le16); | |
179 | ||
180 | /* BF capabilities */ | |
181 | pos += sizeof(__le32); | |
182 | ||
183 | /* antenna selection */ | |
184 | pos += sizeof(u8); | |
185 | } | |
186 | ||
af6b6374 JB |
187 | static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata, |
188 | struct ieee80211_work *wk) | |
189 | { | |
190 | struct ieee80211_local *local = sdata->local; | |
191 | struct sk_buff *skb; | |
192 | struct ieee80211_mgmt *mgmt; | |
ab13315a | 193 | u8 *pos, qos_info; |
8e664fb3 | 194 | size_t offset = 0, noffset; |
0915cba3 | 195 | int i, count, rates_len, supp_rates_len; |
af6b6374 JB |
196 | u16 capab; |
197 | struct ieee80211_supported_band *sband; | |
198 | u32 rates = 0; | |
199 | ||
77c8144a JB |
200 | sband = local->hw.wiphy->bands[wk->chan->band]; |
201 | ||
76f27364 SG |
202 | if (wk->assoc.supp_rates_len) { |
203 | /* | |
204 | * Get all rates supported by the device and the AP as | |
205 | * some APs don't like getting a superset of their rates | |
206 | * in the association request (e.g. D-Link DAP 1353 in | |
207 | * b-only mode)... | |
208 | */ | |
209 | rates_len = ieee80211_compatible_rates(wk->assoc.supp_rates, | |
210 | wk->assoc.supp_rates_len, | |
211 | sband, &rates); | |
212 | } else { | |
213 | /* | |
214 | * In case AP not provide any supported rates information | |
215 | * before association, we send information element(s) with | |
216 | * all rates that we support. | |
217 | */ | |
218 | rates = ~0; | |
219 | rates_len = sband->n_bitrates; | |
220 | } | |
77c8144a JB |
221 | |
222 | skb = alloc_skb(local->hw.extra_tx_headroom + | |
223 | sizeof(*mgmt) + /* bit too much but doesn't matter */ | |
224 | 2 + wk->assoc.ssid_len + /* SSID */ | |
225 | 4 + rates_len + /* (extended) rates */ | |
226 | 4 + /* power capability */ | |
227 | 2 + 2 * sband->n_channels + /* supported channels */ | |
228 | 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ | |
229 | wk->ie_len + /* extra IEs */ | |
230 | 9, /* WMM */ | |
231 | GFP_KERNEL); | |
d15b8459 | 232 | if (!skb) |
af6b6374 | 233 | return; |
d15b8459 | 234 | |
af6b6374 JB |
235 | skb_reserve(skb, local->hw.extra_tx_headroom); |
236 | ||
af6b6374 JB |
237 | capab = WLAN_CAPABILITY_ESS; |
238 | ||
239 | if (sband->band == IEEE80211_BAND_2GHZ) { | |
240 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) | |
241 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; | |
242 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) | |
243 | capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; | |
244 | } | |
245 | ||
246 | if (wk->assoc.capability & WLAN_CAPABILITY_PRIVACY) | |
247 | capab |= WLAN_CAPABILITY_PRIVACY; | |
248 | ||
af6b6374 JB |
249 | if ((wk->assoc.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && |
250 | (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)) | |
251 | capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; | |
252 | ||
253 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
254 | memset(mgmt, 0, 24); | |
255 | memcpy(mgmt->da, wk->filter_ta, ETH_ALEN); | |
256 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); | |
257 | memcpy(mgmt->bssid, wk->filter_ta, ETH_ALEN); | |
258 | ||
259 | if (!is_zero_ether_addr(wk->assoc.prev_bssid)) { | |
260 | skb_put(skb, 10); | |
261 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
262 | IEEE80211_STYPE_REASSOC_REQ); | |
263 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); | |
264 | mgmt->u.reassoc_req.listen_interval = | |
265 | cpu_to_le16(local->hw.conf.listen_interval); | |
266 | memcpy(mgmt->u.reassoc_req.current_ap, wk->assoc.prev_bssid, | |
267 | ETH_ALEN); | |
268 | } else { | |
269 | skb_put(skb, 4); | |
270 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
271 | IEEE80211_STYPE_ASSOC_REQ); | |
272 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); | |
273 | mgmt->u.assoc_req.listen_interval = | |
274 | cpu_to_le16(local->hw.conf.listen_interval); | |
275 | } | |
276 | ||
277 | /* SSID */ | |
0915cba3 | 278 | pos = skb_put(skb, 2 + wk->assoc.ssid_len); |
af6b6374 JB |
279 | *pos++ = WLAN_EID_SSID; |
280 | *pos++ = wk->assoc.ssid_len; | |
281 | memcpy(pos, wk->assoc.ssid, wk->assoc.ssid_len); | |
282 | ||
283 | /* add all rates which were marked to be used above */ | |
284 | supp_rates_len = rates_len; | |
285 | if (supp_rates_len > 8) | |
286 | supp_rates_len = 8; | |
287 | ||
af6b6374 JB |
288 | pos = skb_put(skb, supp_rates_len + 2); |
289 | *pos++ = WLAN_EID_SUPP_RATES; | |
290 | *pos++ = supp_rates_len; | |
291 | ||
292 | count = 0; | |
293 | for (i = 0; i < sband->n_bitrates; i++) { | |
294 | if (BIT(i) & rates) { | |
295 | int rate = sband->bitrates[i].bitrate; | |
296 | *pos++ = (u8) (rate / 5); | |
297 | if (++count == 8) | |
298 | break; | |
299 | } | |
300 | } | |
301 | ||
302 | if (rates_len > count) { | |
303 | pos = skb_put(skb, rates_len - count + 2); | |
304 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
305 | *pos++ = rates_len - count; | |
306 | ||
307 | for (i++; i < sband->n_bitrates; i++) { | |
308 | if (BIT(i) & rates) { | |
309 | int rate = sband->bitrates[i].bitrate; | |
310 | *pos++ = (u8) (rate / 5); | |
311 | } | |
312 | } | |
313 | } | |
314 | ||
315 | if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { | |
316 | /* 1. power capabilities */ | |
317 | pos = skb_put(skb, 4); | |
318 | *pos++ = WLAN_EID_PWR_CAPABILITY; | |
319 | *pos++ = 2; | |
320 | *pos++ = 0; /* min tx power */ | |
77c8144a | 321 | *pos++ = wk->chan->max_power; /* max tx power */ |
af6b6374 JB |
322 | |
323 | /* 2. supported channels */ | |
324 | /* TODO: get this in reg domain format */ | |
325 | pos = skb_put(skb, 2 * sband->n_channels + 2); | |
326 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; | |
327 | *pos++ = 2 * sband->n_channels; | |
328 | for (i = 0; i < sband->n_channels; i++) { | |
329 | *pos++ = ieee80211_frequency_to_channel( | |
330 | sband->channels[i].center_freq); | |
331 | *pos++ = 1; /* one channel in the subband*/ | |
332 | } | |
333 | } | |
334 | ||
8e664fb3 | 335 | /* if present, add any custom IEs that go before HT */ |
af6b6374 | 336 | if (wk->ie_len && wk->ie) { |
8e664fb3 JB |
337 | static const u8 before_ht[] = { |
338 | WLAN_EID_SSID, | |
339 | WLAN_EID_SUPP_RATES, | |
340 | WLAN_EID_EXT_SUPP_RATES, | |
341 | WLAN_EID_PWR_CAPABILITY, | |
342 | WLAN_EID_SUPPORTED_CHANNELS, | |
343 | WLAN_EID_RSN, | |
344 | WLAN_EID_QOS_CAPA, | |
345 | WLAN_EID_RRM_ENABLED_CAPABILITIES, | |
346 | WLAN_EID_MOBILITY_DOMAIN, | |
347 | WLAN_EID_SUPPORTED_REGULATORY_CLASSES, | |
348 | }; | |
349 | noffset = ieee80211_ie_split(wk->ie, wk->ie_len, | |
350 | before_ht, ARRAY_SIZE(before_ht), | |
351 | offset); | |
352 | pos = skb_put(skb, noffset - offset); | |
353 | memcpy(pos, wk->ie + offset, noffset - offset); | |
354 | offset = noffset; | |
af6b6374 JB |
355 | } |
356 | ||
77c8144a JB |
357 | if (wk->assoc.use_11n && wk->assoc.wmm_used && |
358 | local->hw.queues >= 4) | |
359 | ieee80211_add_ht_ie(skb, wk->assoc.ht_information_ie, | |
360 | sband, wk->chan, wk->assoc.smps); | |
361 | ||
8e664fb3 JB |
362 | /* if present, add any custom non-vendor IEs that go after HT */ |
363 | if (wk->ie_len && wk->ie) { | |
364 | noffset = ieee80211_ie_split_vendor(wk->ie, wk->ie_len, | |
365 | offset); | |
366 | pos = skb_put(skb, noffset - offset); | |
367 | memcpy(pos, wk->ie + offset, noffset - offset); | |
368 | offset = noffset; | |
369 | } | |
370 | ||
af6b6374 | 371 | if (wk->assoc.wmm_used && local->hw.queues >= 4) { |
ab13315a | 372 | if (wk->assoc.uapsd_used) { |
50ae0cf1 KV |
373 | qos_info = local->uapsd_queues; |
374 | qos_info |= (local->uapsd_max_sp_len << | |
ab13315a KV |
375 | IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); |
376 | } else { | |
377 | qos_info = 0; | |
378 | } | |
379 | ||
af6b6374 JB |
380 | pos = skb_put(skb, 9); |
381 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
382 | *pos++ = 7; /* len */ | |
383 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ | |
384 | *pos++ = 0x50; | |
385 | *pos++ = 0xf2; | |
386 | *pos++ = 2; /* WME */ | |
387 | *pos++ = 0; /* WME info */ | |
388 | *pos++ = 1; /* WME ver */ | |
ab13315a | 389 | *pos++ = qos_info; |
af6b6374 JB |
390 | } |
391 | ||
8e664fb3 JB |
392 | /* add any remaining custom (i.e. vendor specific here) IEs */ |
393 | if (wk->ie_len && wk->ie) { | |
394 | noffset = wk->ie_len; | |
395 | pos = skb_put(skb, noffset - offset); | |
396 | memcpy(pos, wk->ie + offset, noffset - offset); | |
397 | } | |
398 | ||
af6b6374 JB |
399 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
400 | ieee80211_tx_skb(sdata, skb); | |
401 | } | |
402 | ||
403 | static void ieee80211_remove_auth_bss(struct ieee80211_local *local, | |
404 | struct ieee80211_work *wk) | |
405 | { | |
406 | struct cfg80211_bss *cbss; | |
407 | u16 capa_val = WLAN_CAPABILITY_ESS; | |
408 | ||
409 | if (wk->probe_auth.privacy) | |
410 | capa_val |= WLAN_CAPABILITY_PRIVACY; | |
411 | ||
412 | cbss = cfg80211_get_bss(local->hw.wiphy, wk->chan, wk->filter_ta, | |
413 | wk->probe_auth.ssid, wk->probe_auth.ssid_len, | |
414 | WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY, | |
415 | capa_val); | |
416 | if (!cbss) | |
417 | return; | |
418 | ||
419 | cfg80211_unlink_bss(local->hw.wiphy, cbss); | |
420 | cfg80211_put_bss(cbss); | |
421 | } | |
422 | ||
423 | static enum work_action __must_check | |
424 | ieee80211_direct_probe(struct ieee80211_work *wk) | |
425 | { | |
426 | struct ieee80211_sub_if_data *sdata = wk->sdata; | |
427 | struct ieee80211_local *local = sdata->local; | |
428 | ||
b2abb6e2 JB |
429 | if (!wk->probe_auth.synced) { |
430 | int ret = drv_tx_sync(local, sdata, wk->filter_ta, | |
431 | IEEE80211_TX_SYNC_AUTH); | |
432 | if (ret) | |
433 | return WORK_ACT_TIMEOUT; | |
434 | } | |
435 | wk->probe_auth.synced = true; | |
436 | ||
af6b6374 JB |
437 | wk->probe_auth.tries++; |
438 | if (wk->probe_auth.tries > IEEE80211_AUTH_MAX_TRIES) { | |
7d3a1c3b | 439 | printk(KERN_DEBUG "%s: direct probe to %pM timed out\n", |
af6b6374 JB |
440 | sdata->name, wk->filter_ta); |
441 | ||
442 | /* | |
443 | * Most likely AP is not in the range so remove the | |
444 | * bss struct for that AP. | |
445 | */ | |
446 | ieee80211_remove_auth_bss(local, wk); | |
447 | ||
af6b6374 JB |
448 | return WORK_ACT_TIMEOUT; |
449 | } | |
450 | ||
2f886750 BG |
451 | printk(KERN_DEBUG "%s: direct probe to %pM (try %d/%i)\n", |
452 | sdata->name, wk->filter_ta, wk->probe_auth.tries, | |
453 | IEEE80211_AUTH_MAX_TRIES); | |
af6b6374 JB |
454 | |
455 | /* | |
456 | * Direct probe is sent to broadcast address as some APs | |
457 | * will not answer to direct packet in unassociated state. | |
458 | */ | |
459 | ieee80211_send_probe_req(sdata, NULL, wk->probe_auth.ssid, | |
85a237fe | 460 | wk->probe_auth.ssid_len, NULL, 0, |
aad14ceb | 461 | (u32) -1, true, false); |
af6b6374 JB |
462 | |
463 | wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; | |
464 | run_again(local, wk->timeout); | |
465 | ||
466 | return WORK_ACT_NONE; | |
467 | } | |
468 | ||
469 | ||
470 | static enum work_action __must_check | |
471 | ieee80211_authenticate(struct ieee80211_work *wk) | |
472 | { | |
473 | struct ieee80211_sub_if_data *sdata = wk->sdata; | |
474 | struct ieee80211_local *local = sdata->local; | |
475 | ||
b2abb6e2 JB |
476 | if (!wk->probe_auth.synced) { |
477 | int ret = drv_tx_sync(local, sdata, wk->filter_ta, | |
478 | IEEE80211_TX_SYNC_AUTH); | |
479 | if (ret) | |
480 | return WORK_ACT_TIMEOUT; | |
481 | } | |
482 | wk->probe_auth.synced = true; | |
483 | ||
af6b6374 JB |
484 | wk->probe_auth.tries++; |
485 | if (wk->probe_auth.tries > IEEE80211_AUTH_MAX_TRIES) { | |
7d3a1c3b | 486 | printk(KERN_DEBUG "%s: authentication with %pM" |
af6b6374 JB |
487 | " timed out\n", sdata->name, wk->filter_ta); |
488 | ||
489 | /* | |
490 | * Most likely AP is not in the range so remove the | |
491 | * bss struct for that AP. | |
492 | */ | |
493 | ieee80211_remove_auth_bss(local, wk); | |
494 | ||
af6b6374 JB |
495 | return WORK_ACT_TIMEOUT; |
496 | } | |
497 | ||
7d3a1c3b | 498 | printk(KERN_DEBUG "%s: authenticate with %pM (try %d)\n", |
af6b6374 JB |
499 | sdata->name, wk->filter_ta, wk->probe_auth.tries); |
500 | ||
501 | ieee80211_send_auth(sdata, 1, wk->probe_auth.algorithm, wk->ie, | |
502 | wk->ie_len, wk->filter_ta, NULL, 0, 0); | |
503 | wk->probe_auth.transaction = 2; | |
504 | ||
505 | wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; | |
506 | run_again(local, wk->timeout); | |
507 | ||
508 | return WORK_ACT_NONE; | |
509 | } | |
510 | ||
511 | static enum work_action __must_check | |
512 | ieee80211_associate(struct ieee80211_work *wk) | |
513 | { | |
514 | struct ieee80211_sub_if_data *sdata = wk->sdata; | |
515 | struct ieee80211_local *local = sdata->local; | |
516 | ||
b2abb6e2 JB |
517 | if (!wk->assoc.synced) { |
518 | int ret = drv_tx_sync(local, sdata, wk->filter_ta, | |
519 | IEEE80211_TX_SYNC_ASSOC); | |
520 | if (ret) | |
521 | return WORK_ACT_TIMEOUT; | |
522 | } | |
523 | wk->assoc.synced = true; | |
524 | ||
af6b6374 JB |
525 | wk->assoc.tries++; |
526 | if (wk->assoc.tries > IEEE80211_ASSOC_MAX_TRIES) { | |
7d3a1c3b | 527 | printk(KERN_DEBUG "%s: association with %pM" |
af6b6374 JB |
528 | " timed out\n", |
529 | sdata->name, wk->filter_ta); | |
530 | ||
531 | /* | |
532 | * Most likely AP is not in the range so remove the | |
533 | * bss struct for that AP. | |
534 | */ | |
535 | if (wk->assoc.bss) | |
0c1ad2ca | 536 | cfg80211_unlink_bss(local->hw.wiphy, wk->assoc.bss); |
af6b6374 | 537 | |
af6b6374 JB |
538 | return WORK_ACT_TIMEOUT; |
539 | } | |
540 | ||
7d3a1c3b | 541 | printk(KERN_DEBUG "%s: associate with %pM (try %d)\n", |
af6b6374 JB |
542 | sdata->name, wk->filter_ta, wk->assoc.tries); |
543 | ieee80211_send_assoc(sdata, wk); | |
544 | ||
545 | wk->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; | |
546 | run_again(local, wk->timeout); | |
547 | ||
548 | return WORK_ACT_NONE; | |
549 | } | |
550 | ||
b8bc4b0a JB |
551 | static enum work_action __must_check |
552 | ieee80211_remain_on_channel_timeout(struct ieee80211_work *wk) | |
553 | { | |
b8bc4b0a JB |
554 | /* |
555 | * First time we run, do nothing -- the generic code will | |
556 | * have switched to the right channel etc. | |
557 | */ | |
723bae7e | 558 | if (!wk->started) { |
e4da8c37 | 559 | wk->timeout = jiffies + msecs_to_jiffies(wk->remain.duration); |
b8bc4b0a | 560 | |
1990ca61 KV |
561 | cfg80211_ready_on_channel(wk->sdata->dev, (unsigned long) wk, |
562 | wk->chan, wk->chan_type, | |
563 | wk->remain.duration, GFP_KERNEL); | |
b8bc4b0a | 564 | |
e4da8c37 | 565 | return WORK_ACT_NONE; |
b8bc4b0a JB |
566 | } |
567 | ||
e4da8c37 | 568 | return WORK_ACT_TIMEOUT; |
b8bc4b0a JB |
569 | } |
570 | ||
f30221e4 JB |
571 | static enum work_action __must_check |
572 | ieee80211_offchannel_tx(struct ieee80211_work *wk) | |
573 | { | |
574 | if (!wk->started) { | |
575 | wk->timeout = jiffies + msecs_to_jiffies(wk->offchan_tx.wait); | |
576 | ||
577 | /* | |
578 | * After this, offchan_tx.frame remains but now is no | |
579 | * longer a valid pointer -- we still need it as the | |
28a1bcdb | 580 | * cookie for canceling this work/status matching. |
f30221e4 JB |
581 | */ |
582 | ieee80211_tx_skb(wk->sdata, wk->offchan_tx.frame); | |
583 | ||
584 | return WORK_ACT_NONE; | |
585 | } | |
586 | ||
587 | return WORK_ACT_TIMEOUT; | |
588 | } | |
589 | ||
e5b900d2 JB |
590 | static enum work_action __must_check |
591 | ieee80211_assoc_beacon_wait(struct ieee80211_work *wk) | |
592 | { | |
593 | if (wk->started) | |
594 | return WORK_ACT_TIMEOUT; | |
595 | ||
596 | /* | |
597 | * Wait up to one beacon interval ... | |
598 | * should this be more if we miss one? | |
599 | */ | |
600 | printk(KERN_DEBUG "%s: waiting for beacon from %pM\n", | |
601 | wk->sdata->name, wk->filter_ta); | |
602 | wk->timeout = TU_TO_EXP_TIME(wk->assoc.bss->beacon_interval); | |
603 | return WORK_ACT_NONE; | |
604 | } | |
605 | ||
af6b6374 JB |
606 | static void ieee80211_auth_challenge(struct ieee80211_work *wk, |
607 | struct ieee80211_mgmt *mgmt, | |
608 | size_t len) | |
609 | { | |
610 | struct ieee80211_sub_if_data *sdata = wk->sdata; | |
611 | u8 *pos; | |
612 | struct ieee802_11_elems elems; | |
613 | ||
614 | pos = mgmt->u.auth.variable; | |
615 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
616 | if (!elems.challenge) | |
617 | return; | |
618 | ieee80211_send_auth(sdata, 3, wk->probe_auth.algorithm, | |
619 | elems.challenge - 2, elems.challenge_len + 2, | |
620 | wk->filter_ta, wk->probe_auth.key, | |
621 | wk->probe_auth.key_len, wk->probe_auth.key_idx); | |
622 | wk->probe_auth.transaction = 4; | |
623 | } | |
624 | ||
625 | static enum work_action __must_check | |
626 | ieee80211_rx_mgmt_auth(struct ieee80211_work *wk, | |
627 | struct ieee80211_mgmt *mgmt, size_t len) | |
628 | { | |
629 | u16 auth_alg, auth_transaction, status_code; | |
630 | ||
631 | if (wk->type != IEEE80211_WORK_AUTH) | |
b8d92c9c | 632 | return WORK_ACT_MISMATCH; |
af6b6374 JB |
633 | |
634 | if (len < 24 + 6) | |
635 | return WORK_ACT_NONE; | |
636 | ||
637 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
638 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
639 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
640 | ||
641 | if (auth_alg != wk->probe_auth.algorithm || | |
642 | auth_transaction != wk->probe_auth.transaction) | |
643 | return WORK_ACT_NONE; | |
644 | ||
645 | if (status_code != WLAN_STATUS_SUCCESS) { | |
646 | printk(KERN_DEBUG "%s: %pM denied authentication (status %d)\n", | |
647 | wk->sdata->name, mgmt->sa, status_code); | |
648 | return WORK_ACT_DONE; | |
649 | } | |
650 | ||
651 | switch (wk->probe_auth.algorithm) { | |
652 | case WLAN_AUTH_OPEN: | |
653 | case WLAN_AUTH_LEAP: | |
654 | case WLAN_AUTH_FT: | |
655 | break; | |
656 | case WLAN_AUTH_SHARED_KEY: | |
657 | if (wk->probe_auth.transaction != 4) { | |
658 | ieee80211_auth_challenge(wk, mgmt, len); | |
659 | /* need another frame */ | |
660 | return WORK_ACT_NONE; | |
661 | } | |
662 | break; | |
663 | default: | |
664 | WARN_ON(1); | |
665 | return WORK_ACT_NONE; | |
666 | } | |
667 | ||
668 | printk(KERN_DEBUG "%s: authenticated\n", wk->sdata->name); | |
669 | return WORK_ACT_DONE; | |
670 | } | |
671 | ||
672 | static enum work_action __must_check | |
673 | ieee80211_rx_mgmt_assoc_resp(struct ieee80211_work *wk, | |
674 | struct ieee80211_mgmt *mgmt, size_t len, | |
675 | bool reassoc) | |
676 | { | |
677 | struct ieee80211_sub_if_data *sdata = wk->sdata; | |
678 | struct ieee80211_local *local = sdata->local; | |
679 | u16 capab_info, status_code, aid; | |
680 | struct ieee802_11_elems elems; | |
681 | u8 *pos; | |
682 | ||
b8d92c9c JB |
683 | if (wk->type != IEEE80211_WORK_ASSOC) |
684 | return WORK_ACT_MISMATCH; | |
685 | ||
af6b6374 JB |
686 | /* |
687 | * AssocResp and ReassocResp have identical structure, so process both | |
688 | * of them in this function. | |
689 | */ | |
690 | ||
691 | if (len < 24 + 6) | |
692 | return WORK_ACT_NONE; | |
693 | ||
694 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
695 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
696 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
697 | ||
698 | printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x " | |
699 | "status=%d aid=%d)\n", | |
700 | sdata->name, reassoc ? "Rea" : "A", mgmt->sa, | |
701 | capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); | |
702 | ||
703 | pos = mgmt->u.assoc_resp.variable; | |
704 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
705 | ||
706 | if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && | |
707 | elems.timeout_int && elems.timeout_int_len == 5 && | |
708 | elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) { | |
709 | u32 tu, ms; | |
710 | tu = get_unaligned_le32(elems.timeout_int + 1); | |
711 | ms = tu * 1024 / 1000; | |
7d3a1c3b | 712 | printk(KERN_DEBUG "%s: %pM rejected association temporarily; " |
af6b6374 | 713 | "comeback duration %u TU (%u ms)\n", |
7d3a1c3b | 714 | sdata->name, mgmt->sa, tu, ms); |
af6b6374 JB |
715 | wk->timeout = jiffies + msecs_to_jiffies(ms); |
716 | if (ms > IEEE80211_ASSOC_TIMEOUT) | |
717 | run_again(local, wk->timeout); | |
718 | return WORK_ACT_NONE; | |
719 | } | |
720 | ||
721 | if (status_code != WLAN_STATUS_SUCCESS) | |
7d3a1c3b JB |
722 | printk(KERN_DEBUG "%s: %pM denied association (code=%d)\n", |
723 | sdata->name, mgmt->sa, status_code); | |
af6b6374 JB |
724 | else |
725 | printk(KERN_DEBUG "%s: associated\n", sdata->name); | |
726 | ||
727 | return WORK_ACT_DONE; | |
728 | } | |
729 | ||
730 | static enum work_action __must_check | |
731 | ieee80211_rx_mgmt_probe_resp(struct ieee80211_work *wk, | |
732 | struct ieee80211_mgmt *mgmt, size_t len, | |
733 | struct ieee80211_rx_status *rx_status) | |
734 | { | |
735 | struct ieee80211_sub_if_data *sdata = wk->sdata; | |
736 | struct ieee80211_local *local = sdata->local; | |
737 | size_t baselen; | |
738 | ||
739 | ASSERT_WORK_MTX(local); | |
740 | ||
b8d92c9c JB |
741 | if (wk->type != IEEE80211_WORK_DIRECT_PROBE) |
742 | return WORK_ACT_MISMATCH; | |
743 | ||
744 | if (len < 24 + 12) | |
745 | return WORK_ACT_NONE; | |
746 | ||
af6b6374 JB |
747 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
748 | if (baselen > len) | |
749 | return WORK_ACT_NONE; | |
750 | ||
751 | printk(KERN_DEBUG "%s: direct probe responded\n", sdata->name); | |
752 | return WORK_ACT_DONE; | |
753 | } | |
754 | ||
e5b900d2 JB |
755 | static enum work_action __must_check |
756 | ieee80211_rx_mgmt_beacon(struct ieee80211_work *wk, | |
757 | struct ieee80211_mgmt *mgmt, size_t len) | |
758 | { | |
759 | struct ieee80211_sub_if_data *sdata = wk->sdata; | |
760 | struct ieee80211_local *local = sdata->local; | |
761 | ||
762 | ASSERT_WORK_MTX(local); | |
763 | ||
764 | if (wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT) | |
765 | return WORK_ACT_MISMATCH; | |
766 | ||
767 | if (len < 24 + 12) | |
768 | return WORK_ACT_NONE; | |
769 | ||
770 | printk(KERN_DEBUG "%s: beacon received\n", sdata->name); | |
771 | return WORK_ACT_DONE; | |
772 | } | |
773 | ||
af6b6374 JB |
774 | static void ieee80211_work_rx_queued_mgmt(struct ieee80211_local *local, |
775 | struct sk_buff *skb) | |
776 | { | |
777 | struct ieee80211_rx_status *rx_status; | |
778 | struct ieee80211_mgmt *mgmt; | |
779 | struct ieee80211_work *wk; | |
021570e5 | 780 | enum work_action rma = WORK_ACT_NONE; |
af6b6374 JB |
781 | u16 fc; |
782 | ||
783 | rx_status = (struct ieee80211_rx_status *) skb->cb; | |
784 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
785 | fc = le16_to_cpu(mgmt->frame_control); | |
786 | ||
a1699b75 | 787 | mutex_lock(&local->mtx); |
af6b6374 JB |
788 | |
789 | list_for_each_entry(wk, &local->work_list, list) { | |
790 | const u8 *bssid = NULL; | |
791 | ||
792 | switch (wk->type) { | |
793 | case IEEE80211_WORK_DIRECT_PROBE: | |
794 | case IEEE80211_WORK_AUTH: | |
795 | case IEEE80211_WORK_ASSOC: | |
e5b900d2 | 796 | case IEEE80211_WORK_ASSOC_BEACON_WAIT: |
af6b6374 JB |
797 | bssid = wk->filter_ta; |
798 | break; | |
799 | default: | |
800 | continue; | |
801 | } | |
802 | ||
803 | /* | |
804 | * Before queuing, we already verified mgmt->sa, | |
805 | * so this is needed just for matching. | |
806 | */ | |
807 | if (compare_ether_addr(bssid, mgmt->bssid)) | |
808 | continue; | |
809 | ||
810 | switch (fc & IEEE80211_FCTL_STYPE) { | |
e5b900d2 JB |
811 | case IEEE80211_STYPE_BEACON: |
812 | rma = ieee80211_rx_mgmt_beacon(wk, mgmt, skb->len); | |
813 | break; | |
af6b6374 JB |
814 | case IEEE80211_STYPE_PROBE_RESP: |
815 | rma = ieee80211_rx_mgmt_probe_resp(wk, mgmt, skb->len, | |
816 | rx_status); | |
817 | break; | |
818 | case IEEE80211_STYPE_AUTH: | |
819 | rma = ieee80211_rx_mgmt_auth(wk, mgmt, skb->len); | |
820 | break; | |
821 | case IEEE80211_STYPE_ASSOC_RESP: | |
822 | rma = ieee80211_rx_mgmt_assoc_resp(wk, mgmt, | |
823 | skb->len, false); | |
824 | break; | |
825 | case IEEE80211_STYPE_REASSOC_RESP: | |
826 | rma = ieee80211_rx_mgmt_assoc_resp(wk, mgmt, | |
827 | skb->len, true); | |
828 | break; | |
829 | default: | |
830 | WARN_ON(1); | |
b8d92c9c | 831 | rma = WORK_ACT_NONE; |
af6b6374 | 832 | } |
b8d92c9c JB |
833 | |
834 | /* | |
835 | * We've either received an unexpected frame, or we have | |
836 | * multiple work items and need to match the frame to the | |
837 | * right one. | |
838 | */ | |
839 | if (rma == WORK_ACT_MISMATCH) | |
840 | continue; | |
841 | ||
af6b6374 JB |
842 | /* |
843 | * We've processed this frame for that work, so it can't | |
844 | * belong to another work struct. | |
845 | * NB: this is also required for correctness for 'rma'! | |
846 | */ | |
847 | break; | |
848 | } | |
849 | ||
850 | switch (rma) { | |
b8d92c9c JB |
851 | case WORK_ACT_MISMATCH: |
852 | /* ignore this unmatched frame */ | |
853 | break; | |
af6b6374 JB |
854 | case WORK_ACT_NONE: |
855 | break; | |
856 | case WORK_ACT_DONE: | |
857 | list_del_rcu(&wk->list); | |
858 | break; | |
859 | default: | |
860 | WARN(1, "unexpected: %d", rma); | |
861 | } | |
862 | ||
a1699b75 | 863 | mutex_unlock(&local->mtx); |
af6b6374 JB |
864 | |
865 | if (rma != WORK_ACT_DONE) | |
866 | goto out; | |
867 | ||
868 | switch (wk->done(wk, skb)) { | |
869 | case WORK_DONE_DESTROY: | |
870 | free_work(wk); | |
871 | break; | |
872 | case WORK_DONE_REQUEUE: | |
873 | synchronize_rcu(); | |
e4da8c37 | 874 | wk->started = false; /* restart */ |
a1699b75 | 875 | mutex_lock(&local->mtx); |
af6b6374 | 876 | list_add_tail(&wk->list, &local->work_list); |
a1699b75 | 877 | mutex_unlock(&local->mtx); |
af6b6374 JB |
878 | } |
879 | ||
880 | out: | |
881 | kfree_skb(skb); | |
882 | } | |
883 | ||
da2fd1f0 BG |
884 | static bool ieee80211_work_ct_coexists(enum nl80211_channel_type wk_ct, |
885 | enum nl80211_channel_type oper_ct) | |
886 | { | |
887 | switch (wk_ct) { | |
888 | case NL80211_CHAN_NO_HT: | |
889 | return true; | |
890 | case NL80211_CHAN_HT20: | |
891 | if (oper_ct != NL80211_CHAN_NO_HT) | |
892 | return true; | |
893 | return false; | |
894 | case NL80211_CHAN_HT40MINUS: | |
895 | case NL80211_CHAN_HT40PLUS: | |
896 | return (wk_ct == oper_ct); | |
897 | } | |
898 | WARN_ON(1); /* shouldn't get here */ | |
899 | return false; | |
900 | } | |
901 | ||
902 | static enum nl80211_channel_type | |
903 | ieee80211_calc_ct(enum nl80211_channel_type wk_ct, | |
904 | enum nl80211_channel_type oper_ct) | |
905 | { | |
906 | switch (wk_ct) { | |
907 | case NL80211_CHAN_NO_HT: | |
908 | return oper_ct; | |
909 | case NL80211_CHAN_HT20: | |
910 | if (oper_ct != NL80211_CHAN_NO_HT) | |
911 | return oper_ct; | |
912 | return wk_ct; | |
913 | case NL80211_CHAN_HT40MINUS: | |
914 | case NL80211_CHAN_HT40PLUS: | |
915 | return wk_ct; | |
916 | } | |
917 | WARN_ON(1); /* shouldn't get here */ | |
918 | return wk_ct; | |
919 | } | |
920 | ||
921 | ||
af6b6374 JB |
922 | static void ieee80211_work_timer(unsigned long data) |
923 | { | |
924 | struct ieee80211_local *local = (void *) data; | |
925 | ||
926 | if (local->quiescing) | |
927 | return; | |
928 | ||
929 | ieee80211_queue_work(&local->hw, &local->work_work); | |
930 | } | |
931 | ||
932 | static void ieee80211_work_work(struct work_struct *work) | |
933 | { | |
934 | struct ieee80211_local *local = | |
935 | container_of(work, struct ieee80211_local, work_work); | |
936 | struct sk_buff *skb; | |
937 | struct ieee80211_work *wk, *tmp; | |
938 | LIST_HEAD(free_work); | |
939 | enum work_action rma; | |
e4da8c37 | 940 | bool remain_off_channel = false; |
af6b6374 JB |
941 | |
942 | if (local->scanning) | |
943 | return; | |
944 | ||
945 | /* | |
946 | * ieee80211_queue_work() should have picked up most cases, | |
77c2061d | 947 | * here we'll pick the rest. |
af6b6374 JB |
948 | */ |
949 | if (WARN(local->suspended, "work scheduled while going to suspend\n")) | |
950 | return; | |
951 | ||
952 | /* first process frames to avoid timing out while a frame is pending */ | |
953 | while ((skb = skb_dequeue(&local->work_skb_queue))) | |
954 | ieee80211_work_rx_queued_mgmt(local, skb); | |
955 | ||
a1699b75 | 956 | mutex_lock(&local->mtx); |
af6b6374 | 957 | |
7da7cc1d JB |
958 | ieee80211_recalc_idle(local); |
959 | ||
af6b6374 | 960 | list_for_each_entry_safe(wk, tmp, &local->work_list, list) { |
723bae7e JB |
961 | bool started = wk->started; |
962 | ||
e4da8c37 | 963 | /* mark work as started if it's on the current off-channel */ |
723bae7e | 964 | if (!started && local->tmp_channel && |
e4da8c37 JB |
965 | wk->chan == local->tmp_channel && |
966 | wk->chan_type == local->tmp_channel_type) { | |
723bae7e | 967 | started = true; |
81ac3462 | 968 | wk->timeout = jiffies; |
e4da8c37 JB |
969 | } |
970 | ||
723bae7e | 971 | if (!started && !local->tmp_channel) { |
b23b025f BG |
972 | bool on_oper_chan; |
973 | bool tmp_chan_changed = false; | |
974 | bool on_oper_chan2; | |
da2fd1f0 | 975 | enum nl80211_channel_type wk_ct; |
b23b025f | 976 | on_oper_chan = ieee80211_cfg_on_oper_channel(local); |
da2fd1f0 BG |
977 | |
978 | /* Work with existing channel type if possible. */ | |
979 | wk_ct = wk->chan_type; | |
980 | if (wk->chan == local->hw.conf.channel) | |
981 | wk_ct = ieee80211_calc_ct(wk->chan_type, | |
982 | local->hw.conf.channel_type); | |
983 | ||
b23b025f BG |
984 | if (local->tmp_channel) |
985 | if ((local->tmp_channel != wk->chan) || | |
da2fd1f0 | 986 | (local->tmp_channel_type != wk_ct)) |
b23b025f | 987 | tmp_chan_changed = true; |
e4da8c37 JB |
988 | |
989 | local->tmp_channel = wk->chan; | |
da2fd1f0 | 990 | local->tmp_channel_type = wk_ct; |
b23b025f BG |
991 | /* |
992 | * Leave the station vifs in awake mode if they | |
993 | * happen to be on the same channel as | |
994 | * the requested channel. | |
995 | */ | |
996 | on_oper_chan2 = ieee80211_cfg_on_oper_channel(local); | |
997 | if (on_oper_chan != on_oper_chan2) { | |
998 | if (on_oper_chan2) { | |
999 | /* going off oper channel, PS too */ | |
1000 | ieee80211_offchannel_stop_vifs(local, | |
1001 | true); | |
1002 | ieee80211_hw_config(local, 0); | |
1003 | } else { | |
1004 | /* going on channel, but leave PS | |
1005 | * off-channel. */ | |
1006 | ieee80211_hw_config(local, 0); | |
1007 | ieee80211_offchannel_return(local, | |
1008 | true, | |
1009 | false); | |
1010 | } | |
1011 | } else if (tmp_chan_changed) | |
1012 | /* Still off-channel, but on some other | |
1013 | * channel, so update hardware. | |
1014 | * PS should already be off-channel. | |
1015 | */ | |
1016 | ieee80211_hw_config(local, 0); | |
1017 | ||
723bae7e | 1018 | started = true; |
e4da8c37 JB |
1019 | wk->timeout = jiffies; |
1020 | } | |
1021 | ||
1022 | /* don't try to work with items that aren't started */ | |
723bae7e | 1023 | if (!started) |
e4da8c37 JB |
1024 | continue; |
1025 | ||
af6b6374 JB |
1026 | if (time_is_after_jiffies(wk->timeout)) { |
1027 | /* | |
1028 | * This work item isn't supposed to be worked on | |
1029 | * right now, but take care to adjust the timer | |
1030 | * properly. | |
1031 | */ | |
1032 | run_again(local, wk->timeout); | |
1033 | continue; | |
1034 | } | |
1035 | ||
1036 | switch (wk->type) { | |
1037 | default: | |
1038 | WARN_ON(1); | |
1039 | /* nothing */ | |
1040 | rma = WORK_ACT_NONE; | |
1041 | break; | |
b8bc4b0a JB |
1042 | case IEEE80211_WORK_ABORT: |
1043 | rma = WORK_ACT_TIMEOUT; | |
0e0a2283 | 1044 | break; |
af6b6374 JB |
1045 | case IEEE80211_WORK_DIRECT_PROBE: |
1046 | rma = ieee80211_direct_probe(wk); | |
1047 | break; | |
1048 | case IEEE80211_WORK_AUTH: | |
1049 | rma = ieee80211_authenticate(wk); | |
1050 | break; | |
1051 | case IEEE80211_WORK_ASSOC: | |
1052 | rma = ieee80211_associate(wk); | |
1053 | break; | |
b8bc4b0a JB |
1054 | case IEEE80211_WORK_REMAIN_ON_CHANNEL: |
1055 | rma = ieee80211_remain_on_channel_timeout(wk); | |
1056 | break; | |
f30221e4 JB |
1057 | case IEEE80211_WORK_OFFCHANNEL_TX: |
1058 | rma = ieee80211_offchannel_tx(wk); | |
1059 | break; | |
e5b900d2 JB |
1060 | case IEEE80211_WORK_ASSOC_BEACON_WAIT: |
1061 | rma = ieee80211_assoc_beacon_wait(wk); | |
1062 | break; | |
af6b6374 JB |
1063 | } |
1064 | ||
723bae7e JB |
1065 | wk->started = started; |
1066 | ||
af6b6374 JB |
1067 | switch (rma) { |
1068 | case WORK_ACT_NONE: | |
e4da8c37 JB |
1069 | /* might have changed the timeout */ |
1070 | run_again(local, wk->timeout); | |
af6b6374 JB |
1071 | break; |
1072 | case WORK_ACT_TIMEOUT: | |
1073 | list_del_rcu(&wk->list); | |
1074 | synchronize_rcu(); | |
1075 | list_add(&wk->list, &free_work); | |
1076 | break; | |
1077 | default: | |
1078 | WARN(1, "unexpected: %d", rma); | |
1079 | } | |
1080 | } | |
1081 | ||
e4da8c37 JB |
1082 | list_for_each_entry(wk, &local->work_list, list) { |
1083 | if (!wk->started) | |
1084 | continue; | |
1085 | if (wk->chan != local->tmp_channel) | |
1086 | continue; | |
eaa7af2a EP |
1087 | if (!ieee80211_work_ct_coexists(wk->chan_type, |
1088 | local->tmp_channel_type)) | |
e4da8c37 JB |
1089 | continue; |
1090 | remain_off_channel = true; | |
1091 | } | |
1092 | ||
1093 | if (!remain_off_channel && local->tmp_channel) { | |
1094 | local->tmp_channel = NULL; | |
b23b025f BG |
1095 | /* If tmp_channel wasn't operating channel, then |
1096 | * we need to go back on-channel. | |
42b2aa86 | 1097 | * NOTE: If we can ever be here while scanning, |
b23b025f BG |
1098 | * or if the hw_config() channel config logic changes, |
1099 | * then we may need to do a more thorough check to see if | |
1100 | * we still need to do a hardware config. Currently, | |
1101 | * we cannot be here while scanning, however. | |
1102 | */ | |
6911bf04 | 1103 | if (!ieee80211_cfg_on_oper_channel(local)) |
b23b025f BG |
1104 | ieee80211_hw_config(local, 0); |
1105 | ||
1106 | /* At the least, we need to disable offchannel_ps, | |
1107 | * so just go ahead and run the entire offchannel | |
1108 | * return logic here. We *could* skip enabling | |
1109 | * beaconing if we were already on-oper-channel | |
1110 | * as a future optimization. | |
1111 | */ | |
1112 | ieee80211_offchannel_return(local, true, true); | |
1113 | ||
e4da8c37 JB |
1114 | /* give connection some time to breathe */ |
1115 | run_again(local, jiffies + HZ/2); | |
1116 | } | |
1117 | ||
68dd5b7a TP |
1118 | if (list_empty(&local->work_list) && local->scan_req && |
1119 | !local->scanning) | |
af6b6374 JB |
1120 | ieee80211_queue_delayed_work(&local->hw, |
1121 | &local->scan_work, | |
1122 | round_jiffies_relative(0)); | |
1123 | ||
e4da8c37 JB |
1124 | ieee80211_recalc_idle(local); |
1125 | ||
7da7cc1d JB |
1126 | mutex_unlock(&local->mtx); |
1127 | ||
af6b6374 JB |
1128 | list_for_each_entry_safe(wk, tmp, &free_work, list) { |
1129 | wk->done(wk, NULL); | |
1130 | list_del(&wk->list); | |
1131 | kfree(wk); | |
1132 | } | |
1133 | } | |
1134 | ||
1135 | void ieee80211_add_work(struct ieee80211_work *wk) | |
1136 | { | |
1137 | struct ieee80211_local *local; | |
1138 | ||
1139 | if (WARN_ON(!wk->chan)) | |
1140 | return; | |
1141 | ||
1142 | if (WARN_ON(!wk->sdata)) | |
1143 | return; | |
1144 | ||
1145 | if (WARN_ON(!wk->done)) | |
1146 | return; | |
1147 | ||
81ac3462 JB |
1148 | if (WARN_ON(!ieee80211_sdata_running(wk->sdata))) |
1149 | return; | |
1150 | ||
e4da8c37 | 1151 | wk->started = false; |
af6b6374 JB |
1152 | |
1153 | local = wk->sdata->local; | |
a1699b75 | 1154 | mutex_lock(&local->mtx); |
af6b6374 | 1155 | list_add_tail(&wk->list, &local->work_list); |
a1699b75 | 1156 | mutex_unlock(&local->mtx); |
af6b6374 JB |
1157 | |
1158 | ieee80211_queue_work(&local->hw, &local->work_work); | |
1159 | } | |
1160 | ||
1161 | void ieee80211_work_init(struct ieee80211_local *local) | |
1162 | { | |
af6b6374 JB |
1163 | INIT_LIST_HEAD(&local->work_list); |
1164 | setup_timer(&local->work_timer, ieee80211_work_timer, | |
1165 | (unsigned long)local); | |
1166 | INIT_WORK(&local->work_work, ieee80211_work_work); | |
1167 | skb_queue_head_init(&local->work_skb_queue); | |
1168 | } | |
1169 | ||
1170 | void ieee80211_work_purge(struct ieee80211_sub_if_data *sdata) | |
1171 | { | |
1172 | struct ieee80211_local *local = sdata->local; | |
b8bc4b0a | 1173 | struct ieee80211_work *wk; |
8808f641 | 1174 | bool cleanup = false; |
af6b6374 | 1175 | |
a1699b75 | 1176 | mutex_lock(&local->mtx); |
b8bc4b0a | 1177 | list_for_each_entry(wk, &local->work_list, list) { |
af6b6374 JB |
1178 | if (wk->sdata != sdata) |
1179 | continue; | |
8808f641 | 1180 | cleanup = true; |
b8bc4b0a | 1181 | wk->type = IEEE80211_WORK_ABORT; |
e4da8c37 JB |
1182 | wk->started = true; |
1183 | wk->timeout = jiffies; | |
b8bc4b0a | 1184 | } |
a1699b75 | 1185 | mutex_unlock(&local->mtx); |
b8bc4b0a JB |
1186 | |
1187 | /* run cleanups etc. */ | |
8808f641 HRK |
1188 | if (cleanup) |
1189 | ieee80211_work_work(&local->work_work); | |
b8bc4b0a | 1190 | |
a1699b75 | 1191 | mutex_lock(&local->mtx); |
b8bc4b0a JB |
1192 | list_for_each_entry(wk, &local->work_list, list) { |
1193 | if (wk->sdata != sdata) | |
1194 | continue; | |
1195 | WARN_ON(1); | |
1196 | break; | |
af6b6374 | 1197 | } |
a1699b75 | 1198 | mutex_unlock(&local->mtx); |
af6b6374 JB |
1199 | } |
1200 | ||
1201 | ieee80211_rx_result ieee80211_work_rx_mgmt(struct ieee80211_sub_if_data *sdata, | |
1202 | struct sk_buff *skb) | |
1203 | { | |
1204 | struct ieee80211_local *local = sdata->local; | |
1205 | struct ieee80211_mgmt *mgmt; | |
1206 | struct ieee80211_work *wk; | |
1207 | u16 fc; | |
1208 | ||
1209 | if (skb->len < 24) | |
1210 | return RX_DROP_MONITOR; | |
1211 | ||
1212 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1213 | fc = le16_to_cpu(mgmt->frame_control); | |
1214 | ||
1215 | list_for_each_entry_rcu(wk, &local->work_list, list) { | |
1216 | if (sdata != wk->sdata) | |
1217 | continue; | |
1218 | if (compare_ether_addr(wk->filter_ta, mgmt->sa)) | |
1219 | continue; | |
1220 | if (compare_ether_addr(wk->filter_ta, mgmt->bssid)) | |
1221 | continue; | |
1222 | ||
1223 | switch (fc & IEEE80211_FCTL_STYPE) { | |
1224 | case IEEE80211_STYPE_AUTH: | |
1225 | case IEEE80211_STYPE_PROBE_RESP: | |
1226 | case IEEE80211_STYPE_ASSOC_RESP: | |
1227 | case IEEE80211_STYPE_REASSOC_RESP: | |
e5b900d2 | 1228 | case IEEE80211_STYPE_BEACON: |
af6b6374 JB |
1229 | skb_queue_tail(&local->work_skb_queue, skb); |
1230 | ieee80211_queue_work(&local->hw, &local->work_work); | |
1231 | return RX_QUEUED; | |
1232 | } | |
1233 | } | |
1234 | ||
1235 | return RX_CONTINUE; | |
1236 | } | |
b8bc4b0a | 1237 | |
e4da8c37 JB |
1238 | static enum work_done_result ieee80211_remain_done(struct ieee80211_work *wk, |
1239 | struct sk_buff *skb) | |
1240 | { | |
1241 | /* | |
1242 | * We are done serving the remain-on-channel command. | |
1243 | */ | |
1990ca61 | 1244 | cfg80211_remain_on_channel_expired(wk->sdata->dev, (unsigned long) wk, |
e4da8c37 JB |
1245 | wk->chan, wk->chan_type, |
1246 | GFP_KERNEL); | |
1247 | ||
1248 | return WORK_DONE_DESTROY; | |
1249 | } | |
1250 | ||
b8bc4b0a JB |
1251 | int ieee80211_wk_remain_on_channel(struct ieee80211_sub_if_data *sdata, |
1252 | struct ieee80211_channel *chan, | |
1253 | enum nl80211_channel_type channel_type, | |
1254 | unsigned int duration, u64 *cookie) | |
1255 | { | |
b8bc4b0a JB |
1256 | struct ieee80211_work *wk; |
1257 | ||
1258 | wk = kzalloc(sizeof(*wk), GFP_KERNEL); | |
1259 | if (!wk) | |
1260 | return -ENOMEM; | |
1261 | ||
1262 | wk->type = IEEE80211_WORK_REMAIN_ON_CHANNEL; | |
1263 | wk->chan = chan; | |
e4da8c37 | 1264 | wk->chan_type = channel_type; |
b8bc4b0a | 1265 | wk->sdata = sdata; |
e4da8c37 | 1266 | wk->done = ieee80211_remain_done; |
b8bc4b0a | 1267 | |
e4da8c37 | 1268 | wk->remain.duration = duration; |
b8bc4b0a | 1269 | |
1990ca61 | 1270 | *cookie = (unsigned long) wk; |
b8bc4b0a JB |
1271 | |
1272 | ieee80211_add_work(wk); | |
1273 | ||
b8bc4b0a JB |
1274 | return 0; |
1275 | } | |
1276 | ||
1277 | int ieee80211_wk_cancel_remain_on_channel(struct ieee80211_sub_if_data *sdata, | |
1278 | u64 cookie) | |
1279 | { | |
1280 | struct ieee80211_local *local = sdata->local; | |
1281 | struct ieee80211_work *wk, *tmp; | |
1282 | bool found = false; | |
1283 | ||
a1699b75 | 1284 | mutex_lock(&local->mtx); |
b8bc4b0a | 1285 | list_for_each_entry_safe(wk, tmp, &local->work_list, list) { |
1990ca61 | 1286 | if ((unsigned long) wk == cookie) { |
e4da8c37 | 1287 | wk->timeout = jiffies; |
b8bc4b0a | 1288 | found = true; |
b8bc4b0a JB |
1289 | break; |
1290 | } | |
1291 | } | |
a1699b75 | 1292 | mutex_unlock(&local->mtx); |
b8bc4b0a JB |
1293 | |
1294 | if (!found) | |
1295 | return -ENOENT; | |
1296 | ||
e4da8c37 | 1297 | ieee80211_queue_work(&local->hw, &local->work_work); |
b8bc4b0a JB |
1298 | |
1299 | return 0; | |
1300 | } |