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1 | /* | |
2 | * BSS client mode implementation | |
3 | * Copyright 2003-2008, Jouni Malinen <j@w1.fi> | |
4 | * Copyright 2004, Instant802 Networks, Inc. | |
5 | * Copyright 2005, Devicescape Software, Inc. | |
6 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
7 | * Copyright 2007, Michael Wu <flamingice@sourmilk.net> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
13 | ||
14 | #include <linux/delay.h> | |
15 | #include <linux/if_ether.h> | |
16 | #include <linux/skbuff.h> | |
17 | #include <linux/if_arp.h> | |
18 | #include <linux/etherdevice.h> | |
19 | #include <linux/rtnetlink.h> | |
20 | #include <net/mac80211.h> | |
21 | #include <asm/unaligned.h> | |
22 | ||
23 | #include "ieee80211_i.h" | |
24 | #include "rate.h" | |
25 | #include "led.h" | |
26 | ||
27 | #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2 | |
28 | #define IEEE80211_AUTH_TIMEOUT (HZ / 5) | |
29 | #define IEEE80211_AUTH_MAX_TRIES 3 | |
30 | #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) | |
31 | #define IEEE80211_ASSOC_MAX_TRIES 3 | |
32 | #define IEEE80211_MONITORING_INTERVAL (2 * HZ) | |
33 | #define IEEE80211_PROBE_INTERVAL (60 * HZ) | |
34 | #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ) | |
35 | ||
36 | /* utils */ | |
37 | static int ecw2cw(int ecw) | |
38 | { | |
39 | return (1 << ecw) - 1; | |
40 | } | |
41 | ||
42 | static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie) | |
43 | { | |
44 | u8 *end, *pos; | |
45 | ||
46 | pos = bss->cbss.information_elements; | |
47 | if (pos == NULL) | |
48 | return NULL; | |
49 | end = pos + bss->cbss.len_information_elements; | |
50 | ||
51 | while (pos + 1 < end) { | |
52 | if (pos + 2 + pos[1] > end) | |
53 | break; | |
54 | if (pos[0] == ie) | |
55 | return pos; | |
56 | pos += 2 + pos[1]; | |
57 | } | |
58 | ||
59 | return NULL; | |
60 | } | |
61 | ||
62 | static int ieee80211_compatible_rates(struct ieee80211_bss *bss, | |
63 | struct ieee80211_supported_band *sband, | |
64 | u32 *rates) | |
65 | { | |
66 | int i, j, count; | |
67 | *rates = 0; | |
68 | count = 0; | |
69 | for (i = 0; i < bss->supp_rates_len; i++) { | |
70 | int rate = (bss->supp_rates[i] & 0x7F) * 5; | |
71 | ||
72 | for (j = 0; j < sband->n_bitrates; j++) | |
73 | if (sband->bitrates[j].bitrate == rate) { | |
74 | *rates |= BIT(j); | |
75 | count++; | |
76 | break; | |
77 | } | |
78 | } | |
79 | ||
80 | return count; | |
81 | } | |
82 | ||
83 | /* frame sending functions */ | |
84 | ||
85 | static void add_extra_ies(struct sk_buff *skb, u8 *ies, size_t ies_len) | |
86 | { | |
87 | if (ies) | |
88 | memcpy(skb_put(skb, ies_len), ies, ies_len); | |
89 | } | |
90 | ||
91 | static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) | |
92 | { | |
93 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
94 | struct ieee80211_local *local = sdata->local; | |
95 | struct sk_buff *skb; | |
96 | struct ieee80211_mgmt *mgmt; | |
97 | u8 *pos, *ies, *ht_ie, *e_ies; | |
98 | int i, len, count, rates_len, supp_rates_len; | |
99 | u16 capab; | |
100 | struct ieee80211_bss *bss; | |
101 | int wmm = 0; | |
102 | struct ieee80211_supported_band *sband; | |
103 | u32 rates = 0; | |
104 | size_t e_ies_len; | |
105 | ||
106 | if (ifmgd->flags & IEEE80211_IBSS_PREV_BSSID_SET) { | |
107 | e_ies = sdata->u.mgd.ie_reassocreq; | |
108 | e_ies_len = sdata->u.mgd.ie_reassocreq_len; | |
109 | } else { | |
110 | e_ies = sdata->u.mgd.ie_assocreq; | |
111 | e_ies_len = sdata->u.mgd.ie_assocreq_len; | |
112 | } | |
113 | ||
114 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
115 | sizeof(*mgmt) + 200 + ifmgd->extra_ie_len + | |
116 | ifmgd->ssid_len + e_ies_len); | |
117 | if (!skb) { | |
118 | printk(KERN_DEBUG "%s: failed to allocate buffer for assoc " | |
119 | "frame\n", sdata->dev->name); | |
120 | return; | |
121 | } | |
122 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
123 | ||
124 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
125 | ||
126 | capab = ifmgd->capab; | |
127 | ||
128 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) { | |
129 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) | |
130 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; | |
131 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) | |
132 | capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; | |
133 | } | |
134 | ||
135 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, | |
136 | local->hw.conf.channel->center_freq, | |
137 | ifmgd->ssid, ifmgd->ssid_len); | |
138 | if (bss) { | |
139 | if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY) | |
140 | capab |= WLAN_CAPABILITY_PRIVACY; | |
141 | if (bss->wmm_used) | |
142 | wmm = 1; | |
143 | ||
144 | /* get all rates supported by the device and the AP as | |
145 | * some APs don't like getting a superset of their rates | |
146 | * in the association request (e.g. D-Link DAP 1353 in | |
147 | * b-only mode) */ | |
148 | rates_len = ieee80211_compatible_rates(bss, sband, &rates); | |
149 | ||
150 | if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && | |
151 | (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)) | |
152 | capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; | |
153 | ||
154 | ieee80211_rx_bss_put(local, bss); | |
155 | } else { | |
156 | rates = ~0; | |
157 | rates_len = sband->n_bitrates; | |
158 | } | |
159 | ||
160 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
161 | memset(mgmt, 0, 24); | |
162 | memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN); | |
163 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); | |
164 | memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN); | |
165 | ||
166 | if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) { | |
167 | skb_put(skb, 10); | |
168 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
169 | IEEE80211_STYPE_REASSOC_REQ); | |
170 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); | |
171 | mgmt->u.reassoc_req.listen_interval = | |
172 | cpu_to_le16(local->hw.conf.listen_interval); | |
173 | memcpy(mgmt->u.reassoc_req.current_ap, ifmgd->prev_bssid, | |
174 | ETH_ALEN); | |
175 | } else { | |
176 | skb_put(skb, 4); | |
177 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
178 | IEEE80211_STYPE_ASSOC_REQ); | |
179 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); | |
180 | mgmt->u.assoc_req.listen_interval = | |
181 | cpu_to_le16(local->hw.conf.listen_interval); | |
182 | } | |
183 | ||
184 | /* SSID */ | |
185 | ies = pos = skb_put(skb, 2 + ifmgd->ssid_len); | |
186 | *pos++ = WLAN_EID_SSID; | |
187 | *pos++ = ifmgd->ssid_len; | |
188 | memcpy(pos, ifmgd->ssid, ifmgd->ssid_len); | |
189 | ||
190 | /* add all rates which were marked to be used above */ | |
191 | supp_rates_len = rates_len; | |
192 | if (supp_rates_len > 8) | |
193 | supp_rates_len = 8; | |
194 | ||
195 | len = sband->n_bitrates; | |
196 | pos = skb_put(skb, supp_rates_len + 2); | |
197 | *pos++ = WLAN_EID_SUPP_RATES; | |
198 | *pos++ = supp_rates_len; | |
199 | ||
200 | count = 0; | |
201 | for (i = 0; i < sband->n_bitrates; i++) { | |
202 | if (BIT(i) & rates) { | |
203 | int rate = sband->bitrates[i].bitrate; | |
204 | *pos++ = (u8) (rate / 5); | |
205 | if (++count == 8) | |
206 | break; | |
207 | } | |
208 | } | |
209 | ||
210 | if (rates_len > count) { | |
211 | pos = skb_put(skb, rates_len - count + 2); | |
212 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
213 | *pos++ = rates_len - count; | |
214 | ||
215 | for (i++; i < sband->n_bitrates; i++) { | |
216 | if (BIT(i) & rates) { | |
217 | int rate = sband->bitrates[i].bitrate; | |
218 | *pos++ = (u8) (rate / 5); | |
219 | } | |
220 | } | |
221 | } | |
222 | ||
223 | if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { | |
224 | /* 1. power capabilities */ | |
225 | pos = skb_put(skb, 4); | |
226 | *pos++ = WLAN_EID_PWR_CAPABILITY; | |
227 | *pos++ = 2; | |
228 | *pos++ = 0; /* min tx power */ | |
229 | *pos++ = local->hw.conf.channel->max_power; /* max tx power */ | |
230 | ||
231 | /* 2. supported channels */ | |
232 | /* TODO: get this in reg domain format */ | |
233 | pos = skb_put(skb, 2 * sband->n_channels + 2); | |
234 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; | |
235 | *pos++ = 2 * sband->n_channels; | |
236 | for (i = 0; i < sband->n_channels; i++) { | |
237 | *pos++ = ieee80211_frequency_to_channel( | |
238 | sband->channels[i].center_freq); | |
239 | *pos++ = 1; /* one channel in the subband*/ | |
240 | } | |
241 | } | |
242 | ||
243 | if (ifmgd->extra_ie) { | |
244 | pos = skb_put(skb, ifmgd->extra_ie_len); | |
245 | memcpy(pos, ifmgd->extra_ie, ifmgd->extra_ie_len); | |
246 | } | |
247 | ||
248 | if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) { | |
249 | pos = skb_put(skb, 9); | |
250 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
251 | *pos++ = 7; /* len */ | |
252 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ | |
253 | *pos++ = 0x50; | |
254 | *pos++ = 0xf2; | |
255 | *pos++ = 2; /* WME */ | |
256 | *pos++ = 0; /* WME info */ | |
257 | *pos++ = 1; /* WME ver */ | |
258 | *pos++ = 0; | |
259 | } | |
260 | ||
261 | /* wmm support is a must to HT */ | |
262 | /* | |
263 | * IEEE802.11n does not allow TKIP/WEP as pairwise | |
264 | * ciphers in HT mode. We still associate in non-ht | |
265 | * mode (11a/b/g) if any one of these ciphers is | |
266 | * configured as pairwise. | |
267 | */ | |
268 | if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) && | |
269 | sband->ht_cap.ht_supported && | |
270 | (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) && | |
271 | ht_ie[1] >= sizeof(struct ieee80211_ht_info) && | |
272 | (!(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))) { | |
273 | struct ieee80211_ht_info *ht_info = | |
274 | (struct ieee80211_ht_info *)(ht_ie + 2); | |
275 | u16 cap = sband->ht_cap.cap; | |
276 | __le16 tmp; | |
277 | u32 flags = local->hw.conf.channel->flags; | |
278 | ||
279 | switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { | |
280 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
281 | if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) { | |
282 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
283 | cap &= ~IEEE80211_HT_CAP_SGI_40; | |
284 | } | |
285 | break; | |
286 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: | |
287 | if (flags & IEEE80211_CHAN_NO_FAT_BELOW) { | |
288 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
289 | cap &= ~IEEE80211_HT_CAP_SGI_40; | |
290 | } | |
291 | break; | |
292 | } | |
293 | ||
294 | tmp = cpu_to_le16(cap); | |
295 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2); | |
296 | *pos++ = WLAN_EID_HT_CAPABILITY; | |
297 | *pos++ = sizeof(struct ieee80211_ht_cap); | |
298 | memset(pos, 0, sizeof(struct ieee80211_ht_cap)); | |
299 | memcpy(pos, &tmp, sizeof(u16)); | |
300 | pos += sizeof(u16); | |
301 | /* TODO: needs a define here for << 2 */ | |
302 | *pos++ = sband->ht_cap.ampdu_factor | | |
303 | (sband->ht_cap.ampdu_density << 2); | |
304 | memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs)); | |
305 | } | |
306 | ||
307 | add_extra_ies(skb, e_ies, e_ies_len); | |
308 | ||
309 | kfree(ifmgd->assocreq_ies); | |
310 | ifmgd->assocreq_ies_len = (skb->data + skb->len) - ies; | |
311 | ifmgd->assocreq_ies = kmalloc(ifmgd->assocreq_ies_len, GFP_KERNEL); | |
312 | if (ifmgd->assocreq_ies) | |
313 | memcpy(ifmgd->assocreq_ies, ies, ifmgd->assocreq_ies_len); | |
314 | ||
315 | ieee80211_tx_skb(sdata, skb, 0); | |
316 | } | |
317 | ||
318 | ||
319 | static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, | |
320 | u16 stype, u16 reason) | |
321 | { | |
322 | struct ieee80211_local *local = sdata->local; | |
323 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
324 | struct sk_buff *skb; | |
325 | struct ieee80211_mgmt *mgmt; | |
326 | u8 *ies; | |
327 | size_t ies_len; | |
328 | ||
329 | if (stype == IEEE80211_STYPE_DEAUTH) { | |
330 | ies = sdata->u.mgd.ie_deauth; | |
331 | ies_len = sdata->u.mgd.ie_deauth_len; | |
332 | } else { | |
333 | ies = sdata->u.mgd.ie_disassoc; | |
334 | ies_len = sdata->u.mgd.ie_disassoc_len; | |
335 | } | |
336 | ||
337 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + | |
338 | ies_len); | |
339 | if (!skb) { | |
340 | printk(KERN_DEBUG "%s: failed to allocate buffer for " | |
341 | "deauth/disassoc frame\n", sdata->dev->name); | |
342 | return; | |
343 | } | |
344 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
345 | ||
346 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
347 | memset(mgmt, 0, 24); | |
348 | memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN); | |
349 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); | |
350 | memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN); | |
351 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); | |
352 | skb_put(skb, 2); | |
353 | /* u.deauth.reason_code == u.disassoc.reason_code */ | |
354 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); | |
355 | ||
356 | add_extra_ies(skb, ies, ies_len); | |
357 | ||
358 | ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED); | |
359 | } | |
360 | ||
361 | void ieee80211_send_pspoll(struct ieee80211_local *local, | |
362 | struct ieee80211_sub_if_data *sdata) | |
363 | { | |
364 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
365 | struct ieee80211_pspoll *pspoll; | |
366 | struct sk_buff *skb; | |
367 | u16 fc; | |
368 | ||
369 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll)); | |
370 | if (!skb) { | |
371 | printk(KERN_DEBUG "%s: failed to allocate buffer for " | |
372 | "pspoll frame\n", sdata->dev->name); | |
373 | return; | |
374 | } | |
375 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
376 | ||
377 | pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll)); | |
378 | memset(pspoll, 0, sizeof(*pspoll)); | |
379 | fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM; | |
380 | pspoll->frame_control = cpu_to_le16(fc); | |
381 | pspoll->aid = cpu_to_le16(ifmgd->aid); | |
382 | ||
383 | /* aid in PS-Poll has its two MSBs each set to 1 */ | |
384 | pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14); | |
385 | ||
386 | memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN); | |
387 | memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN); | |
388 | ||
389 | ieee80211_tx_skb(sdata, skb, 0); | |
390 | } | |
391 | ||
392 | /* MLME */ | |
393 | static void ieee80211_sta_wmm_params(struct ieee80211_local *local, | |
394 | struct ieee80211_if_managed *ifmgd, | |
395 | u8 *wmm_param, size_t wmm_param_len) | |
396 | { | |
397 | struct ieee80211_tx_queue_params params; | |
398 | size_t left; | |
399 | int count; | |
400 | u8 *pos; | |
401 | ||
402 | if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) | |
403 | return; | |
404 | ||
405 | if (!wmm_param) | |
406 | return; | |
407 | ||
408 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) | |
409 | return; | |
410 | count = wmm_param[6] & 0x0f; | |
411 | if (count == ifmgd->wmm_last_param_set) | |
412 | return; | |
413 | ifmgd->wmm_last_param_set = count; | |
414 | ||
415 | pos = wmm_param + 8; | |
416 | left = wmm_param_len - 8; | |
417 | ||
418 | memset(¶ms, 0, sizeof(params)); | |
419 | ||
420 | if (!local->ops->conf_tx) | |
421 | return; | |
422 | ||
423 | local->wmm_acm = 0; | |
424 | for (; left >= 4; left -= 4, pos += 4) { | |
425 | int aci = (pos[0] >> 5) & 0x03; | |
426 | int acm = (pos[0] >> 4) & 0x01; | |
427 | int queue; | |
428 | ||
429 | switch (aci) { | |
430 | case 1: | |
431 | queue = 3; | |
432 | if (acm) | |
433 | local->wmm_acm |= BIT(0) | BIT(3); | |
434 | break; | |
435 | case 2: | |
436 | queue = 1; | |
437 | if (acm) | |
438 | local->wmm_acm |= BIT(4) | BIT(5); | |
439 | break; | |
440 | case 3: | |
441 | queue = 0; | |
442 | if (acm) | |
443 | local->wmm_acm |= BIT(6) | BIT(7); | |
444 | break; | |
445 | case 0: | |
446 | default: | |
447 | queue = 2; | |
448 | if (acm) | |
449 | local->wmm_acm |= BIT(1) | BIT(2); | |
450 | break; | |
451 | } | |
452 | ||
453 | params.aifs = pos[0] & 0x0f; | |
454 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); | |
455 | params.cw_min = ecw2cw(pos[1] & 0x0f); | |
456 | params.txop = get_unaligned_le16(pos + 2); | |
457 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
458 | printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d " | |
459 | "cWmin=%d cWmax=%d txop=%d\n", | |
460 | local->mdev->name, queue, aci, acm, params.aifs, params.cw_min, | |
461 | params.cw_max, params.txop); | |
462 | #endif | |
463 | /* TODO: handle ACM (block TX, fallback to next lowest allowed | |
464 | * AC for now) */ | |
465 | if (local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) { | |
466 | printk(KERN_DEBUG "%s: failed to set TX queue " | |
467 | "parameters for queue %d\n", local->mdev->name, queue); | |
468 | } | |
469 | } | |
470 | } | |
471 | ||
472 | static bool ieee80211_check_tim(struct ieee802_11_elems *elems, u16 aid) | |
473 | { | |
474 | u8 mask; | |
475 | u8 index, indexn1, indexn2; | |
476 | struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *) elems->tim; | |
477 | ||
478 | aid &= 0x3fff; | |
479 | index = aid / 8; | |
480 | mask = 1 << (aid & 7); | |
481 | ||
482 | indexn1 = tim->bitmap_ctrl & 0xfe; | |
483 | indexn2 = elems->tim_len + indexn1 - 4; | |
484 | ||
485 | if (index < indexn1 || index > indexn2) | |
486 | return false; | |
487 | ||
488 | index -= indexn1; | |
489 | ||
490 | return !!(tim->virtual_map[index] & mask); | |
491 | } | |
492 | ||
493 | static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, | |
494 | u16 capab, bool erp_valid, u8 erp) | |
495 | { | |
496 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; | |
497 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
498 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
499 | #endif | |
500 | u32 changed = 0; | |
501 | bool use_protection; | |
502 | bool use_short_preamble; | |
503 | bool use_short_slot; | |
504 | ||
505 | if (erp_valid) { | |
506 | use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; | |
507 | use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; | |
508 | } else { | |
509 | use_protection = false; | |
510 | use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); | |
511 | } | |
512 | ||
513 | use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); | |
514 | ||
515 | if (use_protection != bss_conf->use_cts_prot) { | |
516 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
517 | if (net_ratelimit()) { | |
518 | printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n", | |
519 | sdata->dev->name, | |
520 | use_protection ? "enabled" : "disabled", | |
521 | ifmgd->bssid); | |
522 | } | |
523 | #endif | |
524 | bss_conf->use_cts_prot = use_protection; | |
525 | changed |= BSS_CHANGED_ERP_CTS_PROT; | |
526 | } | |
527 | ||
528 | if (use_short_preamble != bss_conf->use_short_preamble) { | |
529 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
530 | if (net_ratelimit()) { | |
531 | printk(KERN_DEBUG "%s: switched to %s barker preamble" | |
532 | " (BSSID=%pM)\n", | |
533 | sdata->dev->name, | |
534 | use_short_preamble ? "short" : "long", | |
535 | ifmgd->bssid); | |
536 | } | |
537 | #endif | |
538 | bss_conf->use_short_preamble = use_short_preamble; | |
539 | changed |= BSS_CHANGED_ERP_PREAMBLE; | |
540 | } | |
541 | ||
542 | if (use_short_slot != bss_conf->use_short_slot) { | |
543 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
544 | if (net_ratelimit()) { | |
545 | printk(KERN_DEBUG "%s: switched to %s slot time" | |
546 | " (BSSID=%pM)\n", | |
547 | sdata->dev->name, | |
548 | use_short_slot ? "short" : "long", | |
549 | ifmgd->bssid); | |
550 | } | |
551 | #endif | |
552 | bss_conf->use_short_slot = use_short_slot; | |
553 | changed |= BSS_CHANGED_ERP_SLOT; | |
554 | } | |
555 | ||
556 | return changed; | |
557 | } | |
558 | ||
559 | static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata) | |
560 | { | |
561 | union iwreq_data wrqu; | |
562 | ||
563 | memset(&wrqu, 0, sizeof(wrqu)); | |
564 | if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED) | |
565 | memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN); | |
566 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; | |
567 | wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL); | |
568 | } | |
569 | ||
570 | static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata) | |
571 | { | |
572 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
573 | char *buf; | |
574 | size_t len; | |
575 | int i; | |
576 | union iwreq_data wrqu; | |
577 | ||
578 | if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies) | |
579 | return; | |
580 | ||
581 | buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len + | |
582 | ifmgd->assocresp_ies_len), GFP_KERNEL); | |
583 | if (!buf) | |
584 | return; | |
585 | ||
586 | len = sprintf(buf, "ASSOCINFO("); | |
587 | if (ifmgd->assocreq_ies) { | |
588 | len += sprintf(buf + len, "ReqIEs="); | |
589 | for (i = 0; i < ifmgd->assocreq_ies_len; i++) { | |
590 | len += sprintf(buf + len, "%02x", | |
591 | ifmgd->assocreq_ies[i]); | |
592 | } | |
593 | } | |
594 | if (ifmgd->assocresp_ies) { | |
595 | if (ifmgd->assocreq_ies) | |
596 | len += sprintf(buf + len, " "); | |
597 | len += sprintf(buf + len, "RespIEs="); | |
598 | for (i = 0; i < ifmgd->assocresp_ies_len; i++) { | |
599 | len += sprintf(buf + len, "%02x", | |
600 | ifmgd->assocresp_ies[i]); | |
601 | } | |
602 | } | |
603 | len += sprintf(buf + len, ")"); | |
604 | ||
605 | if (len > IW_CUSTOM_MAX) { | |
606 | len = sprintf(buf, "ASSOCRESPIE="); | |
607 | for (i = 0; i < ifmgd->assocresp_ies_len; i++) { | |
608 | len += sprintf(buf + len, "%02x", | |
609 | ifmgd->assocresp_ies[i]); | |
610 | } | |
611 | } | |
612 | ||
613 | if (len <= IW_CUSTOM_MAX) { | |
614 | memset(&wrqu, 0, sizeof(wrqu)); | |
615 | wrqu.data.length = len; | |
616 | wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf); | |
617 | } | |
618 | ||
619 | kfree(buf); | |
620 | } | |
621 | ||
622 | ||
623 | static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, | |
624 | u32 bss_info_changed) | |
625 | { | |
626 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
627 | struct ieee80211_local *local = sdata->local; | |
628 | struct ieee80211_conf *conf = &local_to_hw(local)->conf; | |
629 | ||
630 | struct ieee80211_bss *bss; | |
631 | ||
632 | bss_info_changed |= BSS_CHANGED_ASSOC; | |
633 | ifmgd->flags |= IEEE80211_STA_ASSOCIATED; | |
634 | ||
635 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, | |
636 | conf->channel->center_freq, | |
637 | ifmgd->ssid, ifmgd->ssid_len); | |
638 | if (bss) { | |
639 | /* set timing information */ | |
640 | sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval; | |
641 | sdata->vif.bss_conf.timestamp = bss->cbss.tsf; | |
642 | sdata->vif.bss_conf.dtim_period = bss->dtim_period; | |
643 | ||
644 | bss_info_changed |= ieee80211_handle_bss_capability(sdata, | |
645 | bss->cbss.capability, bss->has_erp_value, bss->erp_value); | |
646 | ||
647 | ieee80211_rx_bss_put(local, bss); | |
648 | } | |
649 | ||
650 | ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET; | |
651 | memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN); | |
652 | ieee80211_sta_send_associnfo(sdata); | |
653 | ||
654 | ifmgd->last_probe = jiffies; | |
655 | ieee80211_led_assoc(local, 1); | |
656 | ||
657 | sdata->vif.bss_conf.assoc = 1; | |
658 | /* | |
659 | * For now just always ask the driver to update the basic rateset | |
660 | * when we have associated, we aren't checking whether it actually | |
661 | * changed or not. | |
662 | */ | |
663 | bss_info_changed |= BSS_CHANGED_BASIC_RATES; | |
664 | ieee80211_bss_info_change_notify(sdata, bss_info_changed); | |
665 | ||
666 | if (local->powersave) { | |
667 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) && | |
668 | local->hw.conf.dynamic_ps_timeout > 0) { | |
669 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
670 | msecs_to_jiffies( | |
671 | local->hw.conf.dynamic_ps_timeout)); | |
672 | } else { | |
673 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
674 | ieee80211_send_nullfunc(local, sdata, 1); | |
675 | conf->flags |= IEEE80211_CONF_PS; | |
676 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
677 | } | |
678 | } | |
679 | ||
680 | netif_tx_start_all_queues(sdata->dev); | |
681 | netif_carrier_on(sdata->dev); | |
682 | ||
683 | ieee80211_sta_send_apinfo(sdata); | |
684 | } | |
685 | ||
686 | static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata) | |
687 | { | |
688 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
689 | ||
690 | ifmgd->direct_probe_tries++; | |
691 | if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) { | |
692 | printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n", | |
693 | sdata->dev->name, ifmgd->bssid); | |
694 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
695 | ieee80211_sta_send_apinfo(sdata); | |
696 | ||
697 | /* | |
698 | * Most likely AP is not in the range so remove the | |
699 | * bss information associated to the AP | |
700 | */ | |
701 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, | |
702 | sdata->local->hw.conf.channel->center_freq, | |
703 | ifmgd->ssid, ifmgd->ssid_len); | |
704 | return; | |
705 | } | |
706 | ||
707 | printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n", | |
708 | sdata->dev->name, ifmgd->bssid, | |
709 | ifmgd->direct_probe_tries); | |
710 | ||
711 | ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; | |
712 | ||
713 | set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifmgd->request); | |
714 | ||
715 | /* Direct probe is sent to broadcast address as some APs | |
716 | * will not answer to direct packet in unassociated state. | |
717 | */ | |
718 | ieee80211_send_probe_req(sdata, NULL, | |
719 | ifmgd->ssid, ifmgd->ssid_len, NULL, 0); | |
720 | ||
721 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT); | |
722 | } | |
723 | ||
724 | ||
725 | static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata) | |
726 | { | |
727 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
728 | ||
729 | ifmgd->auth_tries++; | |
730 | if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) { | |
731 | printk(KERN_DEBUG "%s: authentication with AP %pM" | |
732 | " timed out\n", | |
733 | sdata->dev->name, ifmgd->bssid); | |
734 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
735 | ieee80211_sta_send_apinfo(sdata); | |
736 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, | |
737 | sdata->local->hw.conf.channel->center_freq, | |
738 | ifmgd->ssid, ifmgd->ssid_len); | |
739 | return; | |
740 | } | |
741 | ||
742 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; | |
743 | printk(KERN_DEBUG "%s: authenticate with AP %pM\n", | |
744 | sdata->dev->name, ifmgd->bssid); | |
745 | ||
746 | ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, NULL, 0, | |
747 | ifmgd->bssid, 0); | |
748 | ifmgd->auth_transaction = 2; | |
749 | ||
750 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT); | |
751 | } | |
752 | ||
753 | /* | |
754 | * The disassoc 'reason' argument can be either our own reason | |
755 | * if self disconnected or a reason code from the AP. | |
756 | */ | |
757 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, | |
758 | bool deauth, bool self_disconnected, | |
759 | u16 reason) | |
760 | { | |
761 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
762 | struct ieee80211_local *local = sdata->local; | |
763 | struct sta_info *sta; | |
764 | u32 changed = 0, config_changed = 0; | |
765 | ||
766 | rcu_read_lock(); | |
767 | ||
768 | sta = sta_info_get(local, ifmgd->bssid); | |
769 | if (!sta) { | |
770 | rcu_read_unlock(); | |
771 | return; | |
772 | } | |
773 | ||
774 | if (deauth) { | |
775 | ifmgd->direct_probe_tries = 0; | |
776 | ifmgd->auth_tries = 0; | |
777 | } | |
778 | ifmgd->assoc_scan_tries = 0; | |
779 | ifmgd->assoc_tries = 0; | |
780 | ||
781 | netif_tx_stop_all_queues(sdata->dev); | |
782 | netif_carrier_off(sdata->dev); | |
783 | ||
784 | ieee80211_sta_tear_down_BA_sessions(sta); | |
785 | ||
786 | if (self_disconnected) { | |
787 | if (deauth) | |
788 | ieee80211_send_deauth_disassoc(sdata, | |
789 | IEEE80211_STYPE_DEAUTH, reason); | |
790 | else | |
791 | ieee80211_send_deauth_disassoc(sdata, | |
792 | IEEE80211_STYPE_DISASSOC, reason); | |
793 | } | |
794 | ||
795 | ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED; | |
796 | changed |= ieee80211_reset_erp_info(sdata); | |
797 | ||
798 | ieee80211_led_assoc(local, 0); | |
799 | changed |= BSS_CHANGED_ASSOC; | |
800 | sdata->vif.bss_conf.assoc = false; | |
801 | ||
802 | ieee80211_sta_send_apinfo(sdata); | |
803 | ||
804 | if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) { | |
805 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
806 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, | |
807 | sdata->local->hw.conf.channel->center_freq, | |
808 | ifmgd->ssid, ifmgd->ssid_len); | |
809 | } | |
810 | ||
811 | rcu_read_unlock(); | |
812 | ||
813 | /* channel(_type) changes are handled by ieee80211_hw_config */ | |
814 | local->oper_channel_type = NL80211_CHAN_NO_HT; | |
815 | ||
816 | local->power_constr_level = 0; | |
817 | ||
818 | del_timer_sync(&local->dynamic_ps_timer); | |
819 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
820 | ||
821 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { | |
822 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
823 | config_changed |= IEEE80211_CONF_CHANGE_PS; | |
824 | } | |
825 | ||
826 | ieee80211_hw_config(local, config_changed); | |
827 | ieee80211_bss_info_change_notify(sdata, changed); | |
828 | ||
829 | rcu_read_lock(); | |
830 | ||
831 | sta = sta_info_get(local, ifmgd->bssid); | |
832 | if (!sta) { | |
833 | rcu_read_unlock(); | |
834 | return; | |
835 | } | |
836 | ||
837 | sta_info_unlink(&sta); | |
838 | ||
839 | rcu_read_unlock(); | |
840 | ||
841 | sta_info_destroy(sta); | |
842 | } | |
843 | ||
844 | static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata) | |
845 | { | |
846 | if (!sdata || !sdata->default_key || | |
847 | sdata->default_key->conf.alg != ALG_WEP) | |
848 | return 0; | |
849 | return 1; | |
850 | } | |
851 | ||
852 | static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata) | |
853 | { | |
854 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
855 | struct ieee80211_local *local = sdata->local; | |
856 | struct ieee80211_bss *bss; | |
857 | int bss_privacy; | |
858 | int wep_privacy; | |
859 | int privacy_invoked; | |
860 | ||
861 | if (!ifmgd || (ifmgd->flags & IEEE80211_STA_MIXED_CELL)) | |
862 | return 0; | |
863 | ||
864 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, | |
865 | local->hw.conf.channel->center_freq, | |
866 | ifmgd->ssid, ifmgd->ssid_len); | |
867 | if (!bss) | |
868 | return 0; | |
869 | ||
870 | bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY); | |
871 | wep_privacy = !!ieee80211_sta_wep_configured(sdata); | |
872 | privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED); | |
873 | ||
874 | ieee80211_rx_bss_put(local, bss); | |
875 | ||
876 | if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked)) | |
877 | return 0; | |
878 | ||
879 | return 1; | |
880 | } | |
881 | ||
882 | static void ieee80211_associate(struct ieee80211_sub_if_data *sdata) | |
883 | { | |
884 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
885 | ||
886 | ifmgd->assoc_tries++; | |
887 | if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) { | |
888 | printk(KERN_DEBUG "%s: association with AP %pM" | |
889 | " timed out\n", | |
890 | sdata->dev->name, ifmgd->bssid); | |
891 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
892 | ieee80211_sta_send_apinfo(sdata); | |
893 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, | |
894 | sdata->local->hw.conf.channel->center_freq, | |
895 | ifmgd->ssid, ifmgd->ssid_len); | |
896 | return; | |
897 | } | |
898 | ||
899 | ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE; | |
900 | printk(KERN_DEBUG "%s: associate with AP %pM\n", | |
901 | sdata->dev->name, ifmgd->bssid); | |
902 | if (ieee80211_privacy_mismatch(sdata)) { | |
903 | printk(KERN_DEBUG "%s: mismatch in privacy configuration and " | |
904 | "mixed-cell disabled - abort association\n", sdata->dev->name); | |
905 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
906 | return; | |
907 | } | |
908 | ||
909 | ieee80211_send_assoc(sdata); | |
910 | ||
911 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT); | |
912 | } | |
913 | ||
914 | ||
915 | static void ieee80211_associated(struct ieee80211_sub_if_data *sdata) | |
916 | { | |
917 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
918 | struct ieee80211_local *local = sdata->local; | |
919 | struct sta_info *sta; | |
920 | int disassoc; | |
921 | ||
922 | /* TODO: start monitoring current AP signal quality and number of | |
923 | * missed beacons. Scan other channels every now and then and search | |
924 | * for better APs. */ | |
925 | /* TODO: remove expired BSSes */ | |
926 | ||
927 | ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED; | |
928 | ||
929 | rcu_read_lock(); | |
930 | ||
931 | sta = sta_info_get(local, ifmgd->bssid); | |
932 | if (!sta) { | |
933 | printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n", | |
934 | sdata->dev->name, ifmgd->bssid); | |
935 | disassoc = 1; | |
936 | } else { | |
937 | disassoc = 0; | |
938 | if (time_after(jiffies, | |
939 | sta->last_rx + IEEE80211_MONITORING_INTERVAL)) { | |
940 | if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) { | |
941 | printk(KERN_DEBUG "%s: No ProbeResp from " | |
942 | "current AP %pM - assume out of " | |
943 | "range\n", | |
944 | sdata->dev->name, ifmgd->bssid); | |
945 | disassoc = 1; | |
946 | } else | |
947 | ieee80211_send_probe_req(sdata, ifmgd->bssid, | |
948 | ifmgd->ssid, | |
949 | ifmgd->ssid_len, | |
950 | NULL, 0); | |
951 | ifmgd->flags ^= IEEE80211_STA_PROBEREQ_POLL; | |
952 | } else { | |
953 | ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL; | |
954 | if (time_after(jiffies, ifmgd->last_probe + | |
955 | IEEE80211_PROBE_INTERVAL)) { | |
956 | ifmgd->last_probe = jiffies; | |
957 | ieee80211_send_probe_req(sdata, ifmgd->bssid, | |
958 | ifmgd->ssid, | |
959 | ifmgd->ssid_len, | |
960 | NULL, 0); | |
961 | } | |
962 | } | |
963 | } | |
964 | ||
965 | rcu_read_unlock(); | |
966 | ||
967 | if (disassoc) | |
968 | ieee80211_set_disassoc(sdata, true, true, | |
969 | WLAN_REASON_PREV_AUTH_NOT_VALID); | |
970 | else | |
971 | mod_timer(&ifmgd->timer, jiffies + | |
972 | IEEE80211_MONITORING_INTERVAL); | |
973 | } | |
974 | ||
975 | ||
976 | static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata) | |
977 | { | |
978 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
979 | ||
980 | printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name); | |
981 | ifmgd->flags |= IEEE80211_STA_AUTHENTICATED; | |
982 | ieee80211_associate(sdata); | |
983 | } | |
984 | ||
985 | ||
986 | static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, | |
987 | struct ieee80211_mgmt *mgmt, | |
988 | size_t len) | |
989 | { | |
990 | u8 *pos; | |
991 | struct ieee802_11_elems elems; | |
992 | ||
993 | pos = mgmt->u.auth.variable; | |
994 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
995 | if (!elems.challenge) | |
996 | return; | |
997 | ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg, | |
998 | elems.challenge - 2, elems.challenge_len + 2, | |
999 | sdata->u.mgd.bssid, 1); | |
1000 | sdata->u.mgd.auth_transaction = 4; | |
1001 | } | |
1002 | ||
1003 | static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, | |
1004 | struct ieee80211_mgmt *mgmt, | |
1005 | size_t len) | |
1006 | { | |
1007 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1008 | u16 auth_alg, auth_transaction, status_code; | |
1009 | ||
1010 | if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE) | |
1011 | return; | |
1012 | ||
1013 | if (len < 24 + 6) | |
1014 | return; | |
1015 | ||
1016 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0) | |
1017 | return; | |
1018 | ||
1019 | if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0) | |
1020 | return; | |
1021 | ||
1022 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
1023 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
1024 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
1025 | ||
1026 | if (auth_alg != ifmgd->auth_alg || | |
1027 | auth_transaction != ifmgd->auth_transaction) | |
1028 | return; | |
1029 | ||
1030 | if (status_code != WLAN_STATUS_SUCCESS) { | |
1031 | if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) { | |
1032 | u8 algs[3]; | |
1033 | const int num_algs = ARRAY_SIZE(algs); | |
1034 | int i, pos; | |
1035 | algs[0] = algs[1] = algs[2] = 0xff; | |
1036 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
1037 | algs[0] = WLAN_AUTH_OPEN; | |
1038 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
1039 | algs[1] = WLAN_AUTH_SHARED_KEY; | |
1040 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
1041 | algs[2] = WLAN_AUTH_LEAP; | |
1042 | if (ifmgd->auth_alg == WLAN_AUTH_OPEN) | |
1043 | pos = 0; | |
1044 | else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY) | |
1045 | pos = 1; | |
1046 | else | |
1047 | pos = 2; | |
1048 | for (i = 0; i < num_algs; i++) { | |
1049 | pos++; | |
1050 | if (pos >= num_algs) | |
1051 | pos = 0; | |
1052 | if (algs[pos] == ifmgd->auth_alg || | |
1053 | algs[pos] == 0xff) | |
1054 | continue; | |
1055 | if (algs[pos] == WLAN_AUTH_SHARED_KEY && | |
1056 | !ieee80211_sta_wep_configured(sdata)) | |
1057 | continue; | |
1058 | ifmgd->auth_alg = algs[pos]; | |
1059 | break; | |
1060 | } | |
1061 | } | |
1062 | return; | |
1063 | } | |
1064 | ||
1065 | switch (ifmgd->auth_alg) { | |
1066 | case WLAN_AUTH_OPEN: | |
1067 | case WLAN_AUTH_LEAP: | |
1068 | ieee80211_auth_completed(sdata); | |
1069 | break; | |
1070 | case WLAN_AUTH_SHARED_KEY: | |
1071 | if (ifmgd->auth_transaction == 4) | |
1072 | ieee80211_auth_completed(sdata); | |
1073 | else | |
1074 | ieee80211_auth_challenge(sdata, mgmt, len); | |
1075 | break; | |
1076 | } | |
1077 | } | |
1078 | ||
1079 | ||
1080 | static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, | |
1081 | struct ieee80211_mgmt *mgmt, | |
1082 | size_t len) | |
1083 | { | |
1084 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1085 | u16 reason_code; | |
1086 | ||
1087 | if (len < 24 + 2) | |
1088 | return; | |
1089 | ||
1090 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN)) | |
1091 | return; | |
1092 | ||
1093 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
1094 | ||
1095 | if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED) | |
1096 | printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n", | |
1097 | sdata->dev->name, reason_code); | |
1098 | ||
1099 | if (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE || | |
1100 | ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE || | |
1101 | ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) { | |
1102 | ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; | |
1103 | mod_timer(&ifmgd->timer, jiffies + | |
1104 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1105 | } | |
1106 | ||
1107 | ieee80211_set_disassoc(sdata, true, false, 0); | |
1108 | ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED; | |
1109 | } | |
1110 | ||
1111 | ||
1112 | static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, | |
1113 | struct ieee80211_mgmt *mgmt, | |
1114 | size_t len) | |
1115 | { | |
1116 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1117 | u16 reason_code; | |
1118 | ||
1119 | if (len < 24 + 2) | |
1120 | return; | |
1121 | ||
1122 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN)) | |
1123 | return; | |
1124 | ||
1125 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
1126 | ||
1127 | if (ifmgd->flags & IEEE80211_STA_ASSOCIATED) | |
1128 | printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n", | |
1129 | sdata->dev->name, reason_code); | |
1130 | ||
1131 | if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) { | |
1132 | ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE; | |
1133 | mod_timer(&ifmgd->timer, jiffies + | |
1134 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1135 | } | |
1136 | ||
1137 | ieee80211_set_disassoc(sdata, false, false, reason_code); | |
1138 | } | |
1139 | ||
1140 | ||
1141 | static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, | |
1142 | struct ieee80211_mgmt *mgmt, | |
1143 | size_t len, | |
1144 | int reassoc) | |
1145 | { | |
1146 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1147 | struct ieee80211_local *local = sdata->local; | |
1148 | struct ieee80211_supported_band *sband; | |
1149 | struct sta_info *sta; | |
1150 | u32 rates, basic_rates; | |
1151 | u16 capab_info, status_code, aid; | |
1152 | struct ieee802_11_elems elems; | |
1153 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; | |
1154 | u8 *pos; | |
1155 | u32 changed = 0; | |
1156 | int i, j; | |
1157 | bool have_higher_than_11mbit = false, newsta = false; | |
1158 | u16 ap_ht_cap_flags; | |
1159 | ||
1160 | /* AssocResp and ReassocResp have identical structure, so process both | |
1161 | * of them in this function. */ | |
1162 | ||
1163 | if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE) | |
1164 | return; | |
1165 | ||
1166 | if (len < 24 + 6) | |
1167 | return; | |
1168 | ||
1169 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0) | |
1170 | return; | |
1171 | ||
1172 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
1173 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
1174 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
1175 | ||
1176 | printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x " | |
1177 | "status=%d aid=%d)\n", | |
1178 | sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa, | |
1179 | capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); | |
1180 | ||
1181 | pos = mgmt->u.assoc_resp.variable; | |
1182 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
1183 | ||
1184 | if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && | |
1185 | elems.timeout_int && elems.timeout_int_len == 5 && | |
1186 | elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) { | |
1187 | u32 tu, ms; | |
1188 | tu = get_unaligned_le32(elems.timeout_int + 1); | |
1189 | ms = tu * 1024 / 1000; | |
1190 | printk(KERN_DEBUG "%s: AP rejected association temporarily; " | |
1191 | "comeback duration %u TU (%u ms)\n", | |
1192 | sdata->dev->name, tu, ms); | |
1193 | if (ms > IEEE80211_ASSOC_TIMEOUT) | |
1194 | mod_timer(&ifmgd->timer, | |
1195 | jiffies + msecs_to_jiffies(ms)); | |
1196 | return; | |
1197 | } | |
1198 | ||
1199 | if (status_code != WLAN_STATUS_SUCCESS) { | |
1200 | printk(KERN_DEBUG "%s: AP denied association (code=%d)\n", | |
1201 | sdata->dev->name, status_code); | |
1202 | /* if this was a reassociation, ensure we try a "full" | |
1203 | * association next time. This works around some broken APs | |
1204 | * which do not correctly reject reassociation requests. */ | |
1205 | ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET; | |
1206 | return; | |
1207 | } | |
1208 | ||
1209 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) | |
1210 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " | |
1211 | "set\n", sdata->dev->name, aid); | |
1212 | aid &= ~(BIT(15) | BIT(14)); | |
1213 | ||
1214 | if (!elems.supp_rates) { | |
1215 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", | |
1216 | sdata->dev->name); | |
1217 | return; | |
1218 | } | |
1219 | ||
1220 | printk(KERN_DEBUG "%s: associated\n", sdata->dev->name); | |
1221 | ifmgd->aid = aid; | |
1222 | ifmgd->ap_capab = capab_info; | |
1223 | ||
1224 | kfree(ifmgd->assocresp_ies); | |
1225 | ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt); | |
1226 | ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL); | |
1227 | if (ifmgd->assocresp_ies) | |
1228 | memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len); | |
1229 | ||
1230 | rcu_read_lock(); | |
1231 | ||
1232 | /* Add STA entry for the AP */ | |
1233 | sta = sta_info_get(local, ifmgd->bssid); | |
1234 | if (!sta) { | |
1235 | newsta = true; | |
1236 | ||
1237 | sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC); | |
1238 | if (!sta) { | |
1239 | printk(KERN_DEBUG "%s: failed to alloc STA entry for" | |
1240 | " the AP\n", sdata->dev->name); | |
1241 | rcu_read_unlock(); | |
1242 | return; | |
1243 | } | |
1244 | ||
1245 | /* update new sta with its last rx activity */ | |
1246 | sta->last_rx = jiffies; | |
1247 | } | |
1248 | ||
1249 | /* | |
1250 | * FIXME: Do we really need to update the sta_info's information here? | |
1251 | * We already know about the AP (we found it in our list) so it | |
1252 | * should already be filled with the right info, no? | |
1253 | * As is stands, all this is racy because typically we assume | |
1254 | * the information that is filled in here (except flags) doesn't | |
1255 | * change while a STA structure is alive. As such, it should move | |
1256 | * to between the sta_info_alloc() and sta_info_insert() above. | |
1257 | */ | |
1258 | ||
1259 | set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP | | |
1260 | WLAN_STA_AUTHORIZED); | |
1261 | ||
1262 | rates = 0; | |
1263 | basic_rates = 0; | |
1264 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1265 | ||
1266 | for (i = 0; i < elems.supp_rates_len; i++) { | |
1267 | int rate = (elems.supp_rates[i] & 0x7f) * 5; | |
1268 | bool is_basic = !!(elems.supp_rates[i] & 0x80); | |
1269 | ||
1270 | if (rate > 110) | |
1271 | have_higher_than_11mbit = true; | |
1272 | ||
1273 | for (j = 0; j < sband->n_bitrates; j++) { | |
1274 | if (sband->bitrates[j].bitrate == rate) { | |
1275 | rates |= BIT(j); | |
1276 | if (is_basic) | |
1277 | basic_rates |= BIT(j); | |
1278 | break; | |
1279 | } | |
1280 | } | |
1281 | } | |
1282 | ||
1283 | for (i = 0; i < elems.ext_supp_rates_len; i++) { | |
1284 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; | |
1285 | bool is_basic = !!(elems.supp_rates[i] & 0x80); | |
1286 | ||
1287 | if (rate > 110) | |
1288 | have_higher_than_11mbit = true; | |
1289 | ||
1290 | for (j = 0; j < sband->n_bitrates; j++) { | |
1291 | if (sband->bitrates[j].bitrate == rate) { | |
1292 | rates |= BIT(j); | |
1293 | if (is_basic) | |
1294 | basic_rates |= BIT(j); | |
1295 | break; | |
1296 | } | |
1297 | } | |
1298 | } | |
1299 | ||
1300 | sta->sta.supp_rates[local->hw.conf.channel->band] = rates; | |
1301 | sdata->vif.bss_conf.basic_rates = basic_rates; | |
1302 | ||
1303 | /* cf. IEEE 802.11 9.2.12 */ | |
1304 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
1305 | have_higher_than_11mbit) | |
1306 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
1307 | else | |
1308 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
1309 | ||
1310 | /* If TKIP/WEP is used, no need to parse AP's HT capabilities */ | |
1311 | if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) | |
1312 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, | |
1313 | elems.ht_cap_elem, &sta->sta.ht_cap); | |
1314 | ||
1315 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
1316 | ||
1317 | rate_control_rate_init(sta); | |
1318 | ||
1319 | if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) | |
1320 | set_sta_flags(sta, WLAN_STA_MFP); | |
1321 | ||
1322 | if (elems.wmm_param) | |
1323 | set_sta_flags(sta, WLAN_STA_WME); | |
1324 | ||
1325 | if (newsta) { | |
1326 | int err = sta_info_insert(sta); | |
1327 | if (err) { | |
1328 | printk(KERN_DEBUG "%s: failed to insert STA entry for" | |
1329 | " the AP (error %d)\n", sdata->dev->name, err); | |
1330 | rcu_read_unlock(); | |
1331 | return; | |
1332 | } | |
1333 | } | |
1334 | ||
1335 | rcu_read_unlock(); | |
1336 | ||
1337 | if (elems.wmm_param) | |
1338 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, | |
1339 | elems.wmm_param_len); | |
1340 | ||
1341 | if (elems.ht_info_elem && elems.wmm_param && | |
1342 | (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) && | |
1343 | !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) | |
1344 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, | |
1345 | ap_ht_cap_flags); | |
1346 | ||
1347 | /* set AID and assoc capability, | |
1348 | * ieee80211_set_associated() will tell the driver */ | |
1349 | bss_conf->aid = aid; | |
1350 | bss_conf->assoc_capability = capab_info; | |
1351 | ieee80211_set_associated(sdata, changed); | |
1352 | ||
1353 | ieee80211_associated(sdata); | |
1354 | } | |
1355 | ||
1356 | ||
1357 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, | |
1358 | struct ieee80211_mgmt *mgmt, | |
1359 | size_t len, | |
1360 | struct ieee80211_rx_status *rx_status, | |
1361 | struct ieee802_11_elems *elems, | |
1362 | bool beacon) | |
1363 | { | |
1364 | struct ieee80211_local *local = sdata->local; | |
1365 | int freq; | |
1366 | struct ieee80211_bss *bss; | |
1367 | struct ieee80211_channel *channel; | |
1368 | ||
1369 | if (elems->ds_params && elems->ds_params_len == 1) | |
1370 | freq = ieee80211_channel_to_frequency(elems->ds_params[0]); | |
1371 | else | |
1372 | freq = rx_status->freq; | |
1373 | ||
1374 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
1375 | ||
1376 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
1377 | return; | |
1378 | ||
1379 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, | |
1380 | channel, beacon); | |
1381 | if (!bss) | |
1382 | return; | |
1383 | ||
1384 | if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) && | |
1385 | (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) { | |
1386 | struct ieee80211_channel_sw_ie *sw_elem = | |
1387 | (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem; | |
1388 | ieee80211_process_chanswitch(sdata, sw_elem, bss); | |
1389 | } | |
1390 | ||
1391 | ieee80211_rx_bss_put(local, bss); | |
1392 | } | |
1393 | ||
1394 | ||
1395 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, | |
1396 | struct ieee80211_mgmt *mgmt, | |
1397 | size_t len, | |
1398 | struct ieee80211_rx_status *rx_status) | |
1399 | { | |
1400 | size_t baselen; | |
1401 | struct ieee802_11_elems elems; | |
1402 | ||
1403 | if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN)) | |
1404 | return; /* ignore ProbeResp to foreign address */ | |
1405 | ||
1406 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; | |
1407 | if (baselen > len) | |
1408 | return; | |
1409 | ||
1410 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
1411 | &elems); | |
1412 | ||
1413 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false); | |
1414 | ||
1415 | /* direct probe may be part of the association flow */ | |
1416 | if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE, | |
1417 | &sdata->u.mgd.request)) { | |
1418 | printk(KERN_DEBUG "%s direct probe responded\n", | |
1419 | sdata->dev->name); | |
1420 | ieee80211_authenticate(sdata); | |
1421 | } | |
1422 | } | |
1423 | ||
1424 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, | |
1425 | struct ieee80211_mgmt *mgmt, | |
1426 | size_t len, | |
1427 | struct ieee80211_rx_status *rx_status) | |
1428 | { | |
1429 | struct ieee80211_if_managed *ifmgd; | |
1430 | size_t baselen; | |
1431 | struct ieee802_11_elems elems; | |
1432 | struct ieee80211_local *local = sdata->local; | |
1433 | u32 changed = 0; | |
1434 | bool erp_valid, directed_tim; | |
1435 | u8 erp_value = 0; | |
1436 | ||
1437 | /* Process beacon from the current BSS */ | |
1438 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
1439 | if (baselen > len) | |
1440 | return; | |
1441 | ||
1442 | ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems); | |
1443 | ||
1444 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true); | |
1445 | ||
1446 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
1447 | return; | |
1448 | ||
1449 | ifmgd = &sdata->u.mgd; | |
1450 | ||
1451 | if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) || | |
1452 | memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0) | |
1453 | return; | |
1454 | ||
1455 | if (rx_status->freq != local->hw.conf.channel->center_freq) | |
1456 | return; | |
1457 | ||
1458 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, | |
1459 | elems.wmm_param_len); | |
1460 | ||
1461 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) { | |
1462 | directed_tim = ieee80211_check_tim(&elems, ifmgd->aid); | |
1463 | ||
1464 | if (directed_tim) { | |
1465 | if (local->hw.conf.dynamic_ps_timeout > 0) { | |
1466 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
1467 | ieee80211_hw_config(local, | |
1468 | IEEE80211_CONF_CHANGE_PS); | |
1469 | ieee80211_send_nullfunc(local, sdata, 0); | |
1470 | } else { | |
1471 | local->pspolling = true; | |
1472 | ||
1473 | /* | |
1474 | * Here is assumed that the driver will be | |
1475 | * able to send ps-poll frame and receive a | |
1476 | * response even though power save mode is | |
1477 | * enabled, but some drivers might require | |
1478 | * to disable power save here. This needs | |
1479 | * to be investigated. | |
1480 | */ | |
1481 | ieee80211_send_pspoll(local, sdata); | |
1482 | } | |
1483 | } | |
1484 | } | |
1485 | ||
1486 | if (elems.erp_info && elems.erp_info_len >= 1) { | |
1487 | erp_valid = true; | |
1488 | erp_value = elems.erp_info[0]; | |
1489 | } else { | |
1490 | erp_valid = false; | |
1491 | } | |
1492 | changed |= ieee80211_handle_bss_capability(sdata, | |
1493 | le16_to_cpu(mgmt->u.beacon.capab_info), | |
1494 | erp_valid, erp_value); | |
1495 | ||
1496 | ||
1497 | if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param && | |
1498 | !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) { | |
1499 | struct sta_info *sta; | |
1500 | struct ieee80211_supported_band *sband; | |
1501 | u16 ap_ht_cap_flags; | |
1502 | ||
1503 | rcu_read_lock(); | |
1504 | ||
1505 | sta = sta_info_get(local, ifmgd->bssid); | |
1506 | if (!sta) { | |
1507 | rcu_read_unlock(); | |
1508 | return; | |
1509 | } | |
1510 | ||
1511 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1512 | ||
1513 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, | |
1514 | elems.ht_cap_elem, &sta->sta.ht_cap); | |
1515 | ||
1516 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
1517 | ||
1518 | rcu_read_unlock(); | |
1519 | ||
1520 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, | |
1521 | ap_ht_cap_flags); | |
1522 | } | |
1523 | ||
1524 | if (elems.country_elem) { | |
1525 | /* Note we are only reviewing this on beacons | |
1526 | * for the BSSID we are associated to */ | |
1527 | regulatory_hint_11d(local->hw.wiphy, | |
1528 | elems.country_elem, elems.country_elem_len); | |
1529 | ||
1530 | /* TODO: IBSS also needs this */ | |
1531 | if (elems.pwr_constr_elem) | |
1532 | ieee80211_handle_pwr_constr(sdata, | |
1533 | le16_to_cpu(mgmt->u.probe_resp.capab_info), | |
1534 | elems.pwr_constr_elem, | |
1535 | elems.pwr_constr_elem_len); | |
1536 | } | |
1537 | ||
1538 | ieee80211_bss_info_change_notify(sdata, changed); | |
1539 | } | |
1540 | ||
1541 | ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, | |
1542 | struct sk_buff *skb, | |
1543 | struct ieee80211_rx_status *rx_status) | |
1544 | { | |
1545 | struct ieee80211_local *local = sdata->local; | |
1546 | struct ieee80211_mgmt *mgmt; | |
1547 | u16 fc; | |
1548 | ||
1549 | if (skb->len < 24) | |
1550 | return RX_DROP_MONITOR; | |
1551 | ||
1552 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1553 | fc = le16_to_cpu(mgmt->frame_control); | |
1554 | ||
1555 | switch (fc & IEEE80211_FCTL_STYPE) { | |
1556 | case IEEE80211_STYPE_PROBE_REQ: | |
1557 | case IEEE80211_STYPE_PROBE_RESP: | |
1558 | case IEEE80211_STYPE_BEACON: | |
1559 | memcpy(skb->cb, rx_status, sizeof(*rx_status)); | |
1560 | case IEEE80211_STYPE_AUTH: | |
1561 | case IEEE80211_STYPE_ASSOC_RESP: | |
1562 | case IEEE80211_STYPE_REASSOC_RESP: | |
1563 | case IEEE80211_STYPE_DEAUTH: | |
1564 | case IEEE80211_STYPE_DISASSOC: | |
1565 | skb_queue_tail(&sdata->u.mgd.skb_queue, skb); | |
1566 | queue_work(local->hw.workqueue, &sdata->u.mgd.work); | |
1567 | return RX_QUEUED; | |
1568 | } | |
1569 | ||
1570 | return RX_DROP_MONITOR; | |
1571 | } | |
1572 | ||
1573 | static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, | |
1574 | struct sk_buff *skb) | |
1575 | { | |
1576 | struct ieee80211_rx_status *rx_status; | |
1577 | struct ieee80211_mgmt *mgmt; | |
1578 | u16 fc; | |
1579 | ||
1580 | rx_status = (struct ieee80211_rx_status *) skb->cb; | |
1581 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1582 | fc = le16_to_cpu(mgmt->frame_control); | |
1583 | ||
1584 | switch (fc & IEEE80211_FCTL_STYPE) { | |
1585 | case IEEE80211_STYPE_PROBE_RESP: | |
1586 | ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, | |
1587 | rx_status); | |
1588 | break; | |
1589 | case IEEE80211_STYPE_BEACON: | |
1590 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, | |
1591 | rx_status); | |
1592 | break; | |
1593 | case IEEE80211_STYPE_AUTH: | |
1594 | ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); | |
1595 | break; | |
1596 | case IEEE80211_STYPE_ASSOC_RESP: | |
1597 | ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0); | |
1598 | break; | |
1599 | case IEEE80211_STYPE_REASSOC_RESP: | |
1600 | ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1); | |
1601 | break; | |
1602 | case IEEE80211_STYPE_DEAUTH: | |
1603 | ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); | |
1604 | break; | |
1605 | case IEEE80211_STYPE_DISASSOC: | |
1606 | ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); | |
1607 | break; | |
1608 | } | |
1609 | ||
1610 | kfree_skb(skb); | |
1611 | } | |
1612 | ||
1613 | static void ieee80211_sta_timer(unsigned long data) | |
1614 | { | |
1615 | struct ieee80211_sub_if_data *sdata = | |
1616 | (struct ieee80211_sub_if_data *) data; | |
1617 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1618 | struct ieee80211_local *local = sdata->local; | |
1619 | ||
1620 | set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); | |
1621 | queue_work(local->hw.workqueue, &ifmgd->work); | |
1622 | } | |
1623 | ||
1624 | static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata) | |
1625 | { | |
1626 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1627 | struct ieee80211_local *local = sdata->local; | |
1628 | ||
1629 | if (local->ops->reset_tsf) { | |
1630 | /* Reset own TSF to allow time synchronization work. */ | |
1631 | local->ops->reset_tsf(local_to_hw(local)); | |
1632 | } | |
1633 | ||
1634 | ifmgd->wmm_last_param_set = -1; /* allow any WMM update */ | |
1635 | ||
1636 | ||
1637 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
1638 | ifmgd->auth_alg = WLAN_AUTH_OPEN; | |
1639 | else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
1640 | ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY; | |
1641 | else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
1642 | ifmgd->auth_alg = WLAN_AUTH_LEAP; | |
1643 | else | |
1644 | ifmgd->auth_alg = WLAN_AUTH_OPEN; | |
1645 | ifmgd->auth_transaction = -1; | |
1646 | ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED; | |
1647 | ifmgd->assoc_scan_tries = 0; | |
1648 | ifmgd->direct_probe_tries = 0; | |
1649 | ifmgd->auth_tries = 0; | |
1650 | ifmgd->assoc_tries = 0; | |
1651 | netif_tx_stop_all_queues(sdata->dev); | |
1652 | netif_carrier_off(sdata->dev); | |
1653 | } | |
1654 | ||
1655 | static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata) | |
1656 | { | |
1657 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1658 | struct ieee80211_local *local = sdata->local; | |
1659 | struct ieee80211_bss *bss; | |
1660 | u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid; | |
1661 | u8 ssid_len = ifmgd->ssid_len; | |
1662 | u16 capa_mask = WLAN_CAPABILITY_ESS; | |
1663 | u16 capa_val = WLAN_CAPABILITY_ESS; | |
1664 | struct ieee80211_channel *chan = local->oper_channel; | |
1665 | ||
1666 | if (ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL | | |
1667 | IEEE80211_STA_AUTO_BSSID_SEL | | |
1668 | IEEE80211_STA_AUTO_CHANNEL_SEL)) { | |
1669 | capa_mask |= WLAN_CAPABILITY_PRIVACY; | |
1670 | if (sdata->default_key) | |
1671 | capa_val |= WLAN_CAPABILITY_PRIVACY; | |
1672 | } | |
1673 | ||
1674 | if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) | |
1675 | chan = NULL; | |
1676 | ||
1677 | if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL) | |
1678 | bssid = NULL; | |
1679 | ||
1680 | if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) { | |
1681 | ssid = NULL; | |
1682 | ssid_len = 0; | |
1683 | } | |
1684 | ||
1685 | bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan, | |
1686 | bssid, ssid, ssid_len, | |
1687 | capa_mask, capa_val); | |
1688 | ||
1689 | if (bss) { | |
1690 | ieee80211_set_freq(sdata, bss->cbss.channel->center_freq); | |
1691 | if (!(ifmgd->flags & IEEE80211_STA_SSID_SET)) | |
1692 | ieee80211_sta_set_ssid(sdata, bss->ssid, | |
1693 | bss->ssid_len); | |
1694 | ieee80211_sta_set_bssid(sdata, bss->cbss.bssid); | |
1695 | ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len, | |
1696 | bss->supp_rates); | |
1697 | if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED) | |
1698 | sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED; | |
1699 | else | |
1700 | sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED; | |
1701 | ||
1702 | /* Send out direct probe if no probe resp was received or | |
1703 | * the one we have is outdated | |
1704 | */ | |
1705 | if (!bss->last_probe_resp || | |
1706 | time_after(jiffies, bss->last_probe_resp | |
1707 | + IEEE80211_SCAN_RESULT_EXPIRE)) | |
1708 | ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; | |
1709 | else | |
1710 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; | |
1711 | ||
1712 | ieee80211_rx_bss_put(local, bss); | |
1713 | ieee80211_sta_reset_auth(sdata); | |
1714 | return 0; | |
1715 | } else { | |
1716 | if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) { | |
1717 | ifmgd->assoc_scan_tries++; | |
1718 | /* XXX maybe racy? */ | |
1719 | if (local->scan_req) | |
1720 | return -1; | |
1721 | memcpy(local->int_scan_req.ssids[0].ssid, | |
1722 | ifmgd->ssid, IEEE80211_MAX_SSID_LEN); | |
1723 | if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) | |
1724 | local->int_scan_req.ssids[0].ssid_len = 0; | |
1725 | else | |
1726 | local->int_scan_req.ssids[0].ssid_len = ifmgd->ssid_len; | |
1727 | ieee80211_start_scan(sdata, &local->int_scan_req); | |
1728 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; | |
1729 | set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request); | |
1730 | } else { | |
1731 | ifmgd->assoc_scan_tries = 0; | |
1732 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
1733 | } | |
1734 | } | |
1735 | return -1; | |
1736 | } | |
1737 | ||
1738 | ||
1739 | static void ieee80211_sta_work(struct work_struct *work) | |
1740 | { | |
1741 | struct ieee80211_sub_if_data *sdata = | |
1742 | container_of(work, struct ieee80211_sub_if_data, u.mgd.work); | |
1743 | struct ieee80211_local *local = sdata->local; | |
1744 | struct ieee80211_if_managed *ifmgd; | |
1745 | struct sk_buff *skb; | |
1746 | ||
1747 | if (!netif_running(sdata->dev)) | |
1748 | return; | |
1749 | ||
1750 | if (local->sw_scanning || local->hw_scanning) | |
1751 | return; | |
1752 | ||
1753 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) | |
1754 | return; | |
1755 | ifmgd = &sdata->u.mgd; | |
1756 | ||
1757 | while ((skb = skb_dequeue(&ifmgd->skb_queue))) | |
1758 | ieee80211_sta_rx_queued_mgmt(sdata, skb); | |
1759 | ||
1760 | if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE && | |
1761 | ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE && | |
1762 | ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE && | |
1763 | test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) { | |
1764 | ieee80211_start_scan(sdata, local->scan_req); | |
1765 | return; | |
1766 | } | |
1767 | ||
1768 | if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) { | |
1769 | if (ieee80211_sta_config_auth(sdata)) | |
1770 | return; | |
1771 | clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); | |
1772 | } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request)) | |
1773 | return; | |
1774 | ||
1775 | switch (ifmgd->state) { | |
1776 | case IEEE80211_STA_MLME_DISABLED: | |
1777 | break; | |
1778 | case IEEE80211_STA_MLME_DIRECT_PROBE: | |
1779 | ieee80211_direct_probe(sdata); | |
1780 | break; | |
1781 | case IEEE80211_STA_MLME_AUTHENTICATE: | |
1782 | ieee80211_authenticate(sdata); | |
1783 | break; | |
1784 | case IEEE80211_STA_MLME_ASSOCIATE: | |
1785 | ieee80211_associate(sdata); | |
1786 | break; | |
1787 | case IEEE80211_STA_MLME_ASSOCIATED: | |
1788 | ieee80211_associated(sdata); | |
1789 | break; | |
1790 | default: | |
1791 | WARN_ON(1); | |
1792 | break; | |
1793 | } | |
1794 | ||
1795 | if (ieee80211_privacy_mismatch(sdata)) { | |
1796 | printk(KERN_DEBUG "%s: privacy configuration mismatch and " | |
1797 | "mixed-cell disabled - disassociate\n", sdata->dev->name); | |
1798 | ||
1799 | ieee80211_set_disassoc(sdata, false, true, | |
1800 | WLAN_REASON_UNSPECIFIED); | |
1801 | } | |
1802 | } | |
1803 | ||
1804 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) | |
1805 | { | |
1806 | if (sdata->vif.type == NL80211_IFTYPE_STATION) | |
1807 | queue_work(sdata->local->hw.workqueue, | |
1808 | &sdata->u.mgd.work); | |
1809 | } | |
1810 | ||
1811 | /* interface setup */ | |
1812 | void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) | |
1813 | { | |
1814 | struct ieee80211_if_managed *ifmgd; | |
1815 | ||
1816 | ifmgd = &sdata->u.mgd; | |
1817 | INIT_WORK(&ifmgd->work, ieee80211_sta_work); | |
1818 | INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); | |
1819 | setup_timer(&ifmgd->timer, ieee80211_sta_timer, | |
1820 | (unsigned long) sdata); | |
1821 | setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, | |
1822 | (unsigned long) sdata); | |
1823 | skb_queue_head_init(&ifmgd->skb_queue); | |
1824 | ||
1825 | ifmgd->capab = WLAN_CAPABILITY_ESS; | |
1826 | ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN | | |
1827 | IEEE80211_AUTH_ALG_SHARED_KEY; | |
1828 | ifmgd->flags |= IEEE80211_STA_CREATE_IBSS | | |
1829 | IEEE80211_STA_AUTO_BSSID_SEL | | |
1830 | IEEE80211_STA_AUTO_CHANNEL_SEL; | |
1831 | if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4) | |
1832 | ifmgd->flags |= IEEE80211_STA_WMM_ENABLED; | |
1833 | } | |
1834 | ||
1835 | /* configuration hooks */ | |
1836 | void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata) | |
1837 | { | |
1838 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1839 | struct ieee80211_local *local = sdata->local; | |
1840 | ||
1841 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) | |
1842 | return; | |
1843 | ||
1844 | if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET | | |
1845 | IEEE80211_STA_AUTO_BSSID_SEL)) && | |
1846 | (ifmgd->flags & (IEEE80211_STA_SSID_SET | | |
1847 | IEEE80211_STA_AUTO_SSID_SEL))) { | |
1848 | ||
1849 | if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) | |
1850 | ieee80211_set_disassoc(sdata, true, true, | |
1851 | WLAN_REASON_DEAUTH_LEAVING); | |
1852 | ||
1853 | set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request); | |
1854 | queue_work(local->hw.workqueue, &ifmgd->work); | |
1855 | } | |
1856 | } | |
1857 | ||
1858 | int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata) | |
1859 | { | |
1860 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1861 | ||
1862 | ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET; | |
1863 | ||
1864 | if (ifmgd->ssid_len) | |
1865 | ifmgd->flags |= IEEE80211_STA_SSID_SET; | |
1866 | else | |
1867 | ifmgd->flags &= ~IEEE80211_STA_SSID_SET; | |
1868 | ||
1869 | return 0; | |
1870 | } | |
1871 | ||
1872 | int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len) | |
1873 | { | |
1874 | struct ieee80211_if_managed *ifmgd; | |
1875 | ||
1876 | if (len > IEEE80211_MAX_SSID_LEN) | |
1877 | return -EINVAL; | |
1878 | ||
1879 | ifmgd = &sdata->u.mgd; | |
1880 | ||
1881 | if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) { | |
1882 | memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid)); | |
1883 | memcpy(ifmgd->ssid, ssid, len); | |
1884 | ifmgd->ssid_len = len; | |
1885 | } | |
1886 | ||
1887 | return ieee80211_sta_commit(sdata); | |
1888 | } | |
1889 | ||
1890 | int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len) | |
1891 | { | |
1892 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1893 | memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len); | |
1894 | *len = ifmgd->ssid_len; | |
1895 | return 0; | |
1896 | } | |
1897 | ||
1898 | int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid) | |
1899 | { | |
1900 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1901 | ||
1902 | if (is_valid_ether_addr(bssid)) { | |
1903 | memcpy(ifmgd->bssid, bssid, ETH_ALEN); | |
1904 | ifmgd->flags |= IEEE80211_STA_BSSID_SET; | |
1905 | } else { | |
1906 | memset(ifmgd->bssid, 0, ETH_ALEN); | |
1907 | ifmgd->flags &= ~IEEE80211_STA_BSSID_SET; | |
1908 | } | |
1909 | ||
1910 | if (netif_running(sdata->dev)) { | |
1911 | if (ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID)) { | |
1912 | printk(KERN_DEBUG "%s: Failed to config new BSSID to " | |
1913 | "the low-level driver\n", sdata->dev->name); | |
1914 | } | |
1915 | } | |
1916 | ||
1917 | return ieee80211_sta_commit(sdata); | |
1918 | } | |
1919 | ||
1920 | int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len) | |
1921 | { | |
1922 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1923 | ||
1924 | kfree(ifmgd->extra_ie); | |
1925 | if (len == 0) { | |
1926 | ifmgd->extra_ie = NULL; | |
1927 | ifmgd->extra_ie_len = 0; | |
1928 | return 0; | |
1929 | } | |
1930 | ifmgd->extra_ie = kmalloc(len, GFP_KERNEL); | |
1931 | if (!ifmgd->extra_ie) { | |
1932 | ifmgd->extra_ie_len = 0; | |
1933 | return -ENOMEM; | |
1934 | } | |
1935 | memcpy(ifmgd->extra_ie, ie, len); | |
1936 | ifmgd->extra_ie_len = len; | |
1937 | return 0; | |
1938 | } | |
1939 | ||
1940 | int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason) | |
1941 | { | |
1942 | printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n", | |
1943 | sdata->dev->name, reason); | |
1944 | ||
1945 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
1946 | return -EINVAL; | |
1947 | ||
1948 | ieee80211_set_disassoc(sdata, true, true, reason); | |
1949 | return 0; | |
1950 | } | |
1951 | ||
1952 | int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason) | |
1953 | { | |
1954 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1955 | ||
1956 | printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n", | |
1957 | sdata->dev->name, reason); | |
1958 | ||
1959 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
1960 | return -EINVAL; | |
1961 | ||
1962 | if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED)) | |
1963 | return -ENOLINK; | |
1964 | ||
1965 | ieee80211_set_disassoc(sdata, false, true, reason); | |
1966 | return 0; | |
1967 | } | |
1968 | ||
1969 | /* scan finished notification */ | |
1970 | void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) | |
1971 | { | |
1972 | struct ieee80211_sub_if_data *sdata = local->scan_sdata; | |
1973 | ||
1974 | /* Restart STA timers */ | |
1975 | rcu_read_lock(); | |
1976 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
1977 | ieee80211_restart_sta_timer(sdata); | |
1978 | rcu_read_unlock(); | |
1979 | } | |
1980 | ||
1981 | void ieee80211_dynamic_ps_disable_work(struct work_struct *work) | |
1982 | { | |
1983 | struct ieee80211_local *local = | |
1984 | container_of(work, struct ieee80211_local, | |
1985 | dynamic_ps_disable_work); | |
1986 | ||
1987 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { | |
1988 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
1989 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
1990 | } | |
1991 | ||
1992 | ieee80211_wake_queues_by_reason(&local->hw, | |
1993 | IEEE80211_QUEUE_STOP_REASON_PS); | |
1994 | } | |
1995 | ||
1996 | void ieee80211_dynamic_ps_enable_work(struct work_struct *work) | |
1997 | { | |
1998 | struct ieee80211_local *local = | |
1999 | container_of(work, struct ieee80211_local, | |
2000 | dynamic_ps_enable_work); | |
2001 | struct ieee80211_sub_if_data *sdata = local->scan_sdata; | |
2002 | ||
2003 | if (local->hw.conf.flags & IEEE80211_CONF_PS) | |
2004 | return; | |
2005 | ||
2006 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
2007 | ieee80211_send_nullfunc(local, sdata, 1); | |
2008 | ||
2009 | local->hw.conf.flags |= IEEE80211_CONF_PS; | |
2010 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
2011 | } | |
2012 | ||
2013 | void ieee80211_dynamic_ps_timer(unsigned long data) | |
2014 | { | |
2015 | struct ieee80211_local *local = (void *) data; | |
2016 | ||
2017 | queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work); | |
2018 | } | |
2019 | ||
2020 | void ieee80211_send_nullfunc(struct ieee80211_local *local, | |
2021 | struct ieee80211_sub_if_data *sdata, | |
2022 | int powersave) | |
2023 | { | |
2024 | struct sk_buff *skb; | |
2025 | struct ieee80211_hdr *nullfunc; | |
2026 | __le16 fc; | |
2027 | ||
2028 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) | |
2029 | return; | |
2030 | ||
2031 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24); | |
2032 | if (!skb) { | |
2033 | printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc " | |
2034 | "frame\n", sdata->dev->name); | |
2035 | return; | |
2036 | } | |
2037 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2038 | ||
2039 | nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24); | |
2040 | memset(nullfunc, 0, 24); | |
2041 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | | |
2042 | IEEE80211_FCTL_TODS); | |
2043 | if (powersave) | |
2044 | fc |= cpu_to_le16(IEEE80211_FCTL_PM); | |
2045 | nullfunc->frame_control = fc; | |
2046 | memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); | |
2047 | memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN); | |
2048 | memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
2049 | ||
2050 | ieee80211_tx_skb(sdata, skb, 0); | |
2051 | } |