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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 ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) | |
86 | { | |
87 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
88 | struct ieee80211_local *local = sdata->local; | |
89 | struct sk_buff *skb; | |
90 | struct ieee80211_mgmt *mgmt; | |
91 | u8 *pos, *ies, *ht_ie; | |
92 | int i, len, count, rates_len, supp_rates_len; | |
93 | u16 capab; | |
94 | struct ieee80211_bss *bss; | |
95 | int wmm = 0; | |
96 | struct ieee80211_supported_band *sband; | |
97 | u32 rates = 0; | |
98 | ||
99 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
100 | sizeof(*mgmt) + 200 + ifmgd->extra_ie_len + | |
101 | ifmgd->ssid_len); | |
102 | if (!skb) { | |
103 | printk(KERN_DEBUG "%s: failed to allocate buffer for assoc " | |
104 | "frame\n", sdata->dev->name); | |
105 | return; | |
106 | } | |
107 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
108 | ||
109 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
110 | ||
111 | capab = ifmgd->capab; | |
112 | ||
113 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) { | |
114 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) | |
115 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; | |
116 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) | |
117 | capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; | |
118 | } | |
119 | ||
120 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, | |
121 | local->hw.conf.channel->center_freq, | |
122 | ifmgd->ssid, ifmgd->ssid_len); | |
123 | if (bss) { | |
124 | if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY) | |
125 | capab |= WLAN_CAPABILITY_PRIVACY; | |
126 | if (bss->wmm_used) | |
127 | wmm = 1; | |
128 | ||
129 | /* get all rates supported by the device and the AP as | |
130 | * some APs don't like getting a superset of their rates | |
131 | * in the association request (e.g. D-Link DAP 1353 in | |
132 | * b-only mode) */ | |
133 | rates_len = ieee80211_compatible_rates(bss, sband, &rates); | |
134 | ||
135 | if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && | |
136 | (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)) | |
137 | capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; | |
138 | ||
139 | ieee80211_rx_bss_put(local, bss); | |
140 | } else { | |
141 | rates = ~0; | |
142 | rates_len = sband->n_bitrates; | |
143 | } | |
144 | ||
145 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
146 | memset(mgmt, 0, 24); | |
147 | memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN); | |
148 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); | |
149 | memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN); | |
150 | ||
151 | if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) { | |
152 | skb_put(skb, 10); | |
153 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
154 | IEEE80211_STYPE_REASSOC_REQ); | |
155 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); | |
156 | mgmt->u.reassoc_req.listen_interval = | |
157 | cpu_to_le16(local->hw.conf.listen_interval); | |
158 | memcpy(mgmt->u.reassoc_req.current_ap, ifmgd->prev_bssid, | |
159 | ETH_ALEN); | |
160 | } else { | |
161 | skb_put(skb, 4); | |
162 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
163 | IEEE80211_STYPE_ASSOC_REQ); | |
164 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); | |
165 | mgmt->u.assoc_req.listen_interval = | |
166 | cpu_to_le16(local->hw.conf.listen_interval); | |
167 | } | |
168 | ||
169 | /* SSID */ | |
170 | ies = pos = skb_put(skb, 2 + ifmgd->ssid_len); | |
171 | *pos++ = WLAN_EID_SSID; | |
172 | *pos++ = ifmgd->ssid_len; | |
173 | memcpy(pos, ifmgd->ssid, ifmgd->ssid_len); | |
174 | ||
175 | /* add all rates which were marked to be used above */ | |
176 | supp_rates_len = rates_len; | |
177 | if (supp_rates_len > 8) | |
178 | supp_rates_len = 8; | |
179 | ||
180 | len = sband->n_bitrates; | |
181 | pos = skb_put(skb, supp_rates_len + 2); | |
182 | *pos++ = WLAN_EID_SUPP_RATES; | |
183 | *pos++ = supp_rates_len; | |
184 | ||
185 | count = 0; | |
186 | for (i = 0; i < sband->n_bitrates; i++) { | |
187 | if (BIT(i) & rates) { | |
188 | int rate = sband->bitrates[i].bitrate; | |
189 | *pos++ = (u8) (rate / 5); | |
190 | if (++count == 8) | |
191 | break; | |
192 | } | |
193 | } | |
194 | ||
195 | if (rates_len > count) { | |
196 | pos = skb_put(skb, rates_len - count + 2); | |
197 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
198 | *pos++ = rates_len - count; | |
199 | ||
200 | for (i++; i < sband->n_bitrates; i++) { | |
201 | if (BIT(i) & rates) { | |
202 | int rate = sband->bitrates[i].bitrate; | |
203 | *pos++ = (u8) (rate / 5); | |
204 | } | |
205 | } | |
206 | } | |
207 | ||
208 | if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { | |
209 | /* 1. power capabilities */ | |
210 | pos = skb_put(skb, 4); | |
211 | *pos++ = WLAN_EID_PWR_CAPABILITY; | |
212 | *pos++ = 2; | |
213 | *pos++ = 0; /* min tx power */ | |
214 | *pos++ = local->hw.conf.channel->max_power; /* max tx power */ | |
215 | ||
216 | /* 2. supported channels */ | |
217 | /* TODO: get this in reg domain format */ | |
218 | pos = skb_put(skb, 2 * sband->n_channels + 2); | |
219 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; | |
220 | *pos++ = 2 * sband->n_channels; | |
221 | for (i = 0; i < sband->n_channels; i++) { | |
222 | *pos++ = ieee80211_frequency_to_channel( | |
223 | sband->channels[i].center_freq); | |
224 | *pos++ = 1; /* one channel in the subband*/ | |
225 | } | |
226 | } | |
227 | ||
228 | if (ifmgd->extra_ie) { | |
229 | pos = skb_put(skb, ifmgd->extra_ie_len); | |
230 | memcpy(pos, ifmgd->extra_ie, ifmgd->extra_ie_len); | |
231 | } | |
232 | ||
233 | if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) { | |
234 | pos = skb_put(skb, 9); | |
235 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
236 | *pos++ = 7; /* len */ | |
237 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ | |
238 | *pos++ = 0x50; | |
239 | *pos++ = 0xf2; | |
240 | *pos++ = 2; /* WME */ | |
241 | *pos++ = 0; /* WME info */ | |
242 | *pos++ = 1; /* WME ver */ | |
243 | *pos++ = 0; | |
244 | } | |
245 | ||
246 | /* wmm support is a must to HT */ | |
247 | /* | |
248 | * IEEE802.11n does not allow TKIP/WEP as pairwise | |
249 | * ciphers in HT mode. We still associate in non-ht | |
250 | * mode (11a/b/g) if any one of these ciphers is | |
251 | * configured as pairwise. | |
252 | */ | |
253 | if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) && | |
254 | sband->ht_cap.ht_supported && | |
255 | (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) && | |
256 | ht_ie[1] >= sizeof(struct ieee80211_ht_info) && | |
257 | (!(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))) { | |
258 | struct ieee80211_ht_info *ht_info = | |
259 | (struct ieee80211_ht_info *)(ht_ie + 2); | |
260 | u16 cap = sband->ht_cap.cap; | |
261 | __le16 tmp; | |
262 | u32 flags = local->hw.conf.channel->flags; | |
263 | ||
264 | switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { | |
265 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
266 | if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) { | |
267 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
268 | cap &= ~IEEE80211_HT_CAP_SGI_40; | |
269 | } | |
270 | break; | |
271 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: | |
272 | if (flags & IEEE80211_CHAN_NO_FAT_BELOW) { | |
273 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
274 | cap &= ~IEEE80211_HT_CAP_SGI_40; | |
275 | } | |
276 | break; | |
277 | } | |
278 | ||
279 | tmp = cpu_to_le16(cap); | |
280 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2); | |
281 | *pos++ = WLAN_EID_HT_CAPABILITY; | |
282 | *pos++ = sizeof(struct ieee80211_ht_cap); | |
283 | memset(pos, 0, sizeof(struct ieee80211_ht_cap)); | |
284 | memcpy(pos, &tmp, sizeof(u16)); | |
285 | pos += sizeof(u16); | |
286 | /* TODO: needs a define here for << 2 */ | |
287 | *pos++ = sband->ht_cap.ampdu_factor | | |
288 | (sband->ht_cap.ampdu_density << 2); | |
289 | memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs)); | |
290 | } | |
291 | ||
292 | kfree(ifmgd->assocreq_ies); | |
293 | ifmgd->assocreq_ies_len = (skb->data + skb->len) - ies; | |
294 | ifmgd->assocreq_ies = kmalloc(ifmgd->assocreq_ies_len, GFP_KERNEL); | |
295 | if (ifmgd->assocreq_ies) | |
296 | memcpy(ifmgd->assocreq_ies, ies, ifmgd->assocreq_ies_len); | |
297 | ||
298 | ieee80211_tx_skb(sdata, skb, 0); | |
299 | } | |
300 | ||
301 | ||
302 | static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, | |
303 | u16 stype, u16 reason) | |
304 | { | |
305 | struct ieee80211_local *local = sdata->local; | |
306 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
307 | struct sk_buff *skb; | |
308 | struct ieee80211_mgmt *mgmt; | |
309 | ||
310 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); | |
311 | if (!skb) { | |
312 | printk(KERN_DEBUG "%s: failed to allocate buffer for " | |
313 | "deauth/disassoc frame\n", sdata->dev->name); | |
314 | return; | |
315 | } | |
316 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
317 | ||
318 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
319 | memset(mgmt, 0, 24); | |
320 | memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN); | |
321 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); | |
322 | memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN); | |
323 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); | |
324 | skb_put(skb, 2); | |
325 | /* u.deauth.reason_code == u.disassoc.reason_code */ | |
326 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); | |
327 | ||
328 | ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED); | |
329 | } | |
330 | ||
331 | void ieee80211_send_pspoll(struct ieee80211_local *local, | |
332 | struct ieee80211_sub_if_data *sdata) | |
333 | { | |
334 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
335 | struct ieee80211_pspoll *pspoll; | |
336 | struct sk_buff *skb; | |
337 | u16 fc; | |
338 | ||
339 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll)); | |
340 | if (!skb) { | |
341 | printk(KERN_DEBUG "%s: failed to allocate buffer for " | |
342 | "pspoll frame\n", sdata->dev->name); | |
343 | return; | |
344 | } | |
345 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
346 | ||
347 | pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll)); | |
348 | memset(pspoll, 0, sizeof(*pspoll)); | |
349 | fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM; | |
350 | pspoll->frame_control = cpu_to_le16(fc); | |
351 | pspoll->aid = cpu_to_le16(ifmgd->aid); | |
352 | ||
353 | /* aid in PS-Poll has its two MSBs each set to 1 */ | |
354 | pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14); | |
355 | ||
356 | memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN); | |
357 | memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN); | |
358 | ||
359 | ieee80211_tx_skb(sdata, skb, 0); | |
360 | } | |
361 | ||
362 | /* MLME */ | |
363 | static void ieee80211_sta_wmm_params(struct ieee80211_local *local, | |
364 | struct ieee80211_if_managed *ifmgd, | |
365 | u8 *wmm_param, size_t wmm_param_len) | |
366 | { | |
367 | struct ieee80211_tx_queue_params params; | |
368 | size_t left; | |
369 | int count; | |
370 | u8 *pos; | |
371 | ||
372 | if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) | |
373 | return; | |
374 | ||
375 | if (!wmm_param) | |
376 | return; | |
377 | ||
378 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) | |
379 | return; | |
380 | count = wmm_param[6] & 0x0f; | |
381 | if (count == ifmgd->wmm_last_param_set) | |
382 | return; | |
383 | ifmgd->wmm_last_param_set = count; | |
384 | ||
385 | pos = wmm_param + 8; | |
386 | left = wmm_param_len - 8; | |
387 | ||
388 | memset(¶ms, 0, sizeof(params)); | |
389 | ||
390 | local->wmm_acm = 0; | |
391 | for (; left >= 4; left -= 4, pos += 4) { | |
392 | int aci = (pos[0] >> 5) & 0x03; | |
393 | int acm = (pos[0] >> 4) & 0x01; | |
394 | int queue; | |
395 | ||
396 | switch (aci) { | |
397 | case 1: /* AC_BK */ | |
398 | queue = 3; | |
399 | if (acm) | |
400 | local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ | |
401 | break; | |
402 | case 2: /* AC_VI */ | |
403 | queue = 1; | |
404 | if (acm) | |
405 | local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ | |
406 | break; | |
407 | case 3: /* AC_VO */ | |
408 | queue = 0; | |
409 | if (acm) | |
410 | local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ | |
411 | break; | |
412 | case 0: /* AC_BE */ | |
413 | default: | |
414 | queue = 2; | |
415 | if (acm) | |
416 | local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ | |
417 | break; | |
418 | } | |
419 | ||
420 | params.aifs = pos[0] & 0x0f; | |
421 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); | |
422 | params.cw_min = ecw2cw(pos[1] & 0x0f); | |
423 | params.txop = get_unaligned_le16(pos + 2); | |
424 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
425 | printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d " | |
426 | "cWmin=%d cWmax=%d txop=%d\n", | |
427 | local->mdev->name, queue, aci, acm, params.aifs, params.cw_min, | |
428 | params.cw_max, params.txop); | |
429 | #endif | |
430 | if (local->ops->conf_tx && | |
431 | local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) { | |
432 | printk(KERN_DEBUG "%s: failed to set TX queue " | |
433 | "parameters for queue %d\n", local->mdev->name, queue); | |
434 | } | |
435 | } | |
436 | } | |
437 | ||
438 | static bool ieee80211_check_tim(struct ieee802_11_elems *elems, u16 aid) | |
439 | { | |
440 | u8 mask; | |
441 | u8 index, indexn1, indexn2; | |
442 | struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *) elems->tim; | |
443 | ||
444 | aid &= 0x3fff; | |
445 | index = aid / 8; | |
446 | mask = 1 << (aid & 7); | |
447 | ||
448 | indexn1 = tim->bitmap_ctrl & 0xfe; | |
449 | indexn2 = elems->tim_len + indexn1 - 4; | |
450 | ||
451 | if (index < indexn1 || index > indexn2) | |
452 | return false; | |
453 | ||
454 | index -= indexn1; | |
455 | ||
456 | return !!(tim->virtual_map[index] & mask); | |
457 | } | |
458 | ||
459 | static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, | |
460 | u16 capab, bool erp_valid, u8 erp) | |
461 | { | |
462 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; | |
463 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
464 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
465 | #endif | |
466 | u32 changed = 0; | |
467 | bool use_protection; | |
468 | bool use_short_preamble; | |
469 | bool use_short_slot; | |
470 | ||
471 | if (erp_valid) { | |
472 | use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; | |
473 | use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; | |
474 | } else { | |
475 | use_protection = false; | |
476 | use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); | |
477 | } | |
478 | ||
479 | use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); | |
480 | ||
481 | if (use_protection != bss_conf->use_cts_prot) { | |
482 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
483 | if (net_ratelimit()) { | |
484 | printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n", | |
485 | sdata->dev->name, | |
486 | use_protection ? "enabled" : "disabled", | |
487 | ifmgd->bssid); | |
488 | } | |
489 | #endif | |
490 | bss_conf->use_cts_prot = use_protection; | |
491 | changed |= BSS_CHANGED_ERP_CTS_PROT; | |
492 | } | |
493 | ||
494 | if (use_short_preamble != bss_conf->use_short_preamble) { | |
495 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
496 | if (net_ratelimit()) { | |
497 | printk(KERN_DEBUG "%s: switched to %s barker preamble" | |
498 | " (BSSID=%pM)\n", | |
499 | sdata->dev->name, | |
500 | use_short_preamble ? "short" : "long", | |
501 | ifmgd->bssid); | |
502 | } | |
503 | #endif | |
504 | bss_conf->use_short_preamble = use_short_preamble; | |
505 | changed |= BSS_CHANGED_ERP_PREAMBLE; | |
506 | } | |
507 | ||
508 | if (use_short_slot != bss_conf->use_short_slot) { | |
509 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
510 | if (net_ratelimit()) { | |
511 | printk(KERN_DEBUG "%s: switched to %s slot time" | |
512 | " (BSSID=%pM)\n", | |
513 | sdata->dev->name, | |
514 | use_short_slot ? "short" : "long", | |
515 | ifmgd->bssid); | |
516 | } | |
517 | #endif | |
518 | bss_conf->use_short_slot = use_short_slot; | |
519 | changed |= BSS_CHANGED_ERP_SLOT; | |
520 | } | |
521 | ||
522 | return changed; | |
523 | } | |
524 | ||
525 | static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata) | |
526 | { | |
527 | union iwreq_data wrqu; | |
528 | ||
529 | memset(&wrqu, 0, sizeof(wrqu)); | |
530 | if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED) | |
531 | memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN); | |
532 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; | |
533 | wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL); | |
534 | } | |
535 | ||
536 | static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata) | |
537 | { | |
538 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
539 | char *buf; | |
540 | size_t len; | |
541 | int i; | |
542 | union iwreq_data wrqu; | |
543 | ||
544 | if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies) | |
545 | return; | |
546 | ||
547 | buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len + | |
548 | ifmgd->assocresp_ies_len), GFP_KERNEL); | |
549 | if (!buf) | |
550 | return; | |
551 | ||
552 | len = sprintf(buf, "ASSOCINFO("); | |
553 | if (ifmgd->assocreq_ies) { | |
554 | len += sprintf(buf + len, "ReqIEs="); | |
555 | for (i = 0; i < ifmgd->assocreq_ies_len; i++) { | |
556 | len += sprintf(buf + len, "%02x", | |
557 | ifmgd->assocreq_ies[i]); | |
558 | } | |
559 | } | |
560 | if (ifmgd->assocresp_ies) { | |
561 | if (ifmgd->assocreq_ies) | |
562 | len += sprintf(buf + len, " "); | |
563 | len += sprintf(buf + len, "RespIEs="); | |
564 | for (i = 0; i < ifmgd->assocresp_ies_len; i++) { | |
565 | len += sprintf(buf + len, "%02x", | |
566 | ifmgd->assocresp_ies[i]); | |
567 | } | |
568 | } | |
569 | len += sprintf(buf + len, ")"); | |
570 | ||
571 | if (len > IW_CUSTOM_MAX) { | |
572 | len = sprintf(buf, "ASSOCRESPIE="); | |
573 | for (i = 0; i < ifmgd->assocresp_ies_len; i++) { | |
574 | len += sprintf(buf + len, "%02x", | |
575 | ifmgd->assocresp_ies[i]); | |
576 | } | |
577 | } | |
578 | ||
579 | if (len <= IW_CUSTOM_MAX) { | |
580 | memset(&wrqu, 0, sizeof(wrqu)); | |
581 | wrqu.data.length = len; | |
582 | wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf); | |
583 | } | |
584 | ||
585 | kfree(buf); | |
586 | } | |
587 | ||
588 | ||
589 | static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, | |
590 | u32 bss_info_changed) | |
591 | { | |
592 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
593 | struct ieee80211_local *local = sdata->local; | |
594 | struct ieee80211_conf *conf = &local_to_hw(local)->conf; | |
595 | ||
596 | struct ieee80211_bss *bss; | |
597 | ||
598 | bss_info_changed |= BSS_CHANGED_ASSOC; | |
599 | ifmgd->flags |= IEEE80211_STA_ASSOCIATED; | |
600 | ||
601 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, | |
602 | conf->channel->center_freq, | |
603 | ifmgd->ssid, ifmgd->ssid_len); | |
604 | if (bss) { | |
605 | /* set timing information */ | |
606 | sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval; | |
607 | sdata->vif.bss_conf.timestamp = bss->cbss.tsf; | |
608 | sdata->vif.bss_conf.dtim_period = bss->dtim_period; | |
609 | ||
610 | bss_info_changed |= ieee80211_handle_bss_capability(sdata, | |
611 | bss->cbss.capability, bss->has_erp_value, bss->erp_value); | |
612 | ||
613 | ieee80211_rx_bss_put(local, bss); | |
614 | } | |
615 | ||
616 | ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET; | |
617 | memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN); | |
618 | ieee80211_sta_send_associnfo(sdata); | |
619 | ||
620 | ifmgd->last_probe = jiffies; | |
621 | ieee80211_led_assoc(local, 1); | |
622 | ||
623 | sdata->vif.bss_conf.assoc = 1; | |
624 | /* | |
625 | * For now just always ask the driver to update the basic rateset | |
626 | * when we have associated, we aren't checking whether it actually | |
627 | * changed or not. | |
628 | */ | |
629 | bss_info_changed |= BSS_CHANGED_BASIC_RATES; | |
630 | ieee80211_bss_info_change_notify(sdata, bss_info_changed); | |
631 | ||
632 | if (local->powersave) { | |
633 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) && | |
634 | local->hw.conf.dynamic_ps_timeout > 0) { | |
635 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
636 | msecs_to_jiffies( | |
637 | local->hw.conf.dynamic_ps_timeout)); | |
638 | } else { | |
639 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
640 | ieee80211_send_nullfunc(local, sdata, 1); | |
641 | conf->flags |= IEEE80211_CONF_PS; | |
642 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
643 | } | |
644 | } | |
645 | ||
646 | netif_tx_start_all_queues(sdata->dev); | |
647 | netif_carrier_on(sdata->dev); | |
648 | ||
649 | ieee80211_sta_send_apinfo(sdata); | |
650 | } | |
651 | ||
652 | static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata) | |
653 | { | |
654 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
655 | struct ieee80211_local *local = sdata->local; | |
656 | ||
657 | ifmgd->direct_probe_tries++; | |
658 | if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) { | |
659 | printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n", | |
660 | sdata->dev->name, ifmgd->bssid); | |
661 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
662 | ieee80211_sta_send_apinfo(sdata); | |
663 | ||
664 | /* | |
665 | * Most likely AP is not in the range so remove the | |
666 | * bss information associated to the AP | |
667 | */ | |
668 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, | |
669 | sdata->local->hw.conf.channel->center_freq, | |
670 | ifmgd->ssid, ifmgd->ssid_len); | |
671 | ||
672 | /* | |
673 | * We might have a pending scan which had no chance to run yet | |
674 | * due to state == IEEE80211_STA_MLME_DIRECT_PROBE. | |
675 | * Hence, queue the STAs work again | |
676 | */ | |
677 | queue_work(local->hw.workqueue, &ifmgd->work); | |
678 | return; | |
679 | } | |
680 | ||
681 | printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n", | |
682 | sdata->dev->name, ifmgd->bssid, | |
683 | ifmgd->direct_probe_tries); | |
684 | ||
685 | ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; | |
686 | ||
687 | set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifmgd->request); | |
688 | ||
689 | /* Direct probe is sent to broadcast address as some APs | |
690 | * will not answer to direct packet in unassociated state. | |
691 | */ | |
692 | ieee80211_send_probe_req(sdata, NULL, | |
693 | ifmgd->ssid, ifmgd->ssid_len, NULL, 0); | |
694 | ||
695 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT); | |
696 | } | |
697 | ||
698 | ||
699 | static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata) | |
700 | { | |
701 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
702 | struct ieee80211_local *local = sdata->local; | |
703 | u8 *ies; | |
704 | size_t ies_len; | |
705 | ||
706 | ifmgd->auth_tries++; | |
707 | if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) { | |
708 | printk(KERN_DEBUG "%s: authentication with AP %pM" | |
709 | " timed out\n", | |
710 | sdata->dev->name, ifmgd->bssid); | |
711 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
712 | ieee80211_sta_send_apinfo(sdata); | |
713 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, | |
714 | sdata->local->hw.conf.channel->center_freq, | |
715 | ifmgd->ssid, ifmgd->ssid_len); | |
716 | ||
717 | /* | |
718 | * We might have a pending scan which had no chance to run yet | |
719 | * due to state == IEEE80211_STA_MLME_AUTHENTICATE. | |
720 | * Hence, queue the STAs work again | |
721 | */ | |
722 | queue_work(local->hw.workqueue, &ifmgd->work); | |
723 | return; | |
724 | } | |
725 | ||
726 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; | |
727 | printk(KERN_DEBUG "%s: authenticate with AP %pM\n", | |
728 | sdata->dev->name, ifmgd->bssid); | |
729 | ||
730 | if (ifmgd->flags & IEEE80211_STA_EXT_SME) { | |
731 | ies = ifmgd->sme_auth_ie; | |
732 | ies_len = ifmgd->sme_auth_ie_len; | |
733 | } else { | |
734 | ies = NULL; | |
735 | ies_len = 0; | |
736 | } | |
737 | ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ies, ies_len, | |
738 | ifmgd->bssid, 0); | |
739 | ifmgd->auth_transaction = 2; | |
740 | ||
741 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT); | |
742 | } | |
743 | ||
744 | /* | |
745 | * The disassoc 'reason' argument can be either our own reason | |
746 | * if self disconnected or a reason code from the AP. | |
747 | */ | |
748 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, | |
749 | bool deauth, bool self_disconnected, | |
750 | u16 reason) | |
751 | { | |
752 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
753 | struct ieee80211_local *local = sdata->local; | |
754 | struct sta_info *sta; | |
755 | u32 changed = 0, config_changed = 0; | |
756 | ||
757 | rcu_read_lock(); | |
758 | ||
759 | sta = sta_info_get(local, ifmgd->bssid); | |
760 | if (!sta) { | |
761 | rcu_read_unlock(); | |
762 | return; | |
763 | } | |
764 | ||
765 | if (deauth) { | |
766 | ifmgd->direct_probe_tries = 0; | |
767 | ifmgd->auth_tries = 0; | |
768 | } | |
769 | ifmgd->assoc_scan_tries = 0; | |
770 | ifmgd->assoc_tries = 0; | |
771 | ||
772 | netif_tx_stop_all_queues(sdata->dev); | |
773 | netif_carrier_off(sdata->dev); | |
774 | ||
775 | ieee80211_sta_tear_down_BA_sessions(sta); | |
776 | ||
777 | if (self_disconnected) { | |
778 | if (deauth) | |
779 | ieee80211_send_deauth_disassoc(sdata, | |
780 | IEEE80211_STYPE_DEAUTH, reason); | |
781 | else | |
782 | ieee80211_send_deauth_disassoc(sdata, | |
783 | IEEE80211_STYPE_DISASSOC, reason); | |
784 | } | |
785 | ||
786 | ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED; | |
787 | changed |= ieee80211_reset_erp_info(sdata); | |
788 | ||
789 | ieee80211_led_assoc(local, 0); | |
790 | changed |= BSS_CHANGED_ASSOC; | |
791 | sdata->vif.bss_conf.assoc = false; | |
792 | ||
793 | ieee80211_sta_send_apinfo(sdata); | |
794 | ||
795 | if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) { | |
796 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
797 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, | |
798 | sdata->local->hw.conf.channel->center_freq, | |
799 | ifmgd->ssid, ifmgd->ssid_len); | |
800 | } | |
801 | ||
802 | rcu_read_unlock(); | |
803 | ||
804 | /* channel(_type) changes are handled by ieee80211_hw_config */ | |
805 | local->oper_channel_type = NL80211_CHAN_NO_HT; | |
806 | ||
807 | local->power_constr_level = 0; | |
808 | ||
809 | del_timer_sync(&local->dynamic_ps_timer); | |
810 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
811 | ||
812 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { | |
813 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
814 | config_changed |= IEEE80211_CONF_CHANGE_PS; | |
815 | } | |
816 | ||
817 | ieee80211_hw_config(local, config_changed); | |
818 | ieee80211_bss_info_change_notify(sdata, changed); | |
819 | ||
820 | rcu_read_lock(); | |
821 | ||
822 | sta = sta_info_get(local, ifmgd->bssid); | |
823 | if (!sta) { | |
824 | rcu_read_unlock(); | |
825 | return; | |
826 | } | |
827 | ||
828 | sta_info_unlink(&sta); | |
829 | ||
830 | rcu_read_unlock(); | |
831 | ||
832 | sta_info_destroy(sta); | |
833 | } | |
834 | ||
835 | static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata) | |
836 | { | |
837 | if (!sdata || !sdata->default_key || | |
838 | sdata->default_key->conf.alg != ALG_WEP) | |
839 | return 0; | |
840 | return 1; | |
841 | } | |
842 | ||
843 | static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata) | |
844 | { | |
845 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
846 | struct ieee80211_local *local = sdata->local; | |
847 | struct ieee80211_bss *bss; | |
848 | int bss_privacy; | |
849 | int wep_privacy; | |
850 | int privacy_invoked; | |
851 | ||
852 | if (!ifmgd || (ifmgd->flags & IEEE80211_STA_EXT_SME)) | |
853 | return 0; | |
854 | ||
855 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, | |
856 | local->hw.conf.channel->center_freq, | |
857 | ifmgd->ssid, ifmgd->ssid_len); | |
858 | if (!bss) | |
859 | return 0; | |
860 | ||
861 | bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY); | |
862 | wep_privacy = !!ieee80211_sta_wep_configured(sdata); | |
863 | privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED); | |
864 | ||
865 | ieee80211_rx_bss_put(local, bss); | |
866 | ||
867 | if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked)) | |
868 | return 0; | |
869 | ||
870 | return 1; | |
871 | } | |
872 | ||
873 | static void ieee80211_associate(struct ieee80211_sub_if_data *sdata) | |
874 | { | |
875 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
876 | struct ieee80211_local *local = sdata->local; | |
877 | ||
878 | ifmgd->assoc_tries++; | |
879 | if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) { | |
880 | printk(KERN_DEBUG "%s: association with AP %pM" | |
881 | " timed out\n", | |
882 | sdata->dev->name, ifmgd->bssid); | |
883 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
884 | ieee80211_sta_send_apinfo(sdata); | |
885 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, | |
886 | sdata->local->hw.conf.channel->center_freq, | |
887 | ifmgd->ssid, ifmgd->ssid_len); | |
888 | /* | |
889 | * We might have a pending scan which had no chance to run yet | |
890 | * due to state == IEEE80211_STA_MLME_ASSOCIATE. | |
891 | * Hence, queue the STAs work again | |
892 | */ | |
893 | queue_work(local->hw.workqueue, &ifmgd->work); | |
894 | return; | |
895 | } | |
896 | ||
897 | ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE; | |
898 | printk(KERN_DEBUG "%s: associate with AP %pM\n", | |
899 | sdata->dev->name, ifmgd->bssid); | |
900 | if (ieee80211_privacy_mismatch(sdata)) { | |
901 | printk(KERN_DEBUG "%s: mismatch in privacy configuration and " | |
902 | "mixed-cell disabled - abort association\n", sdata->dev->name); | |
903 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
904 | return; | |
905 | } | |
906 | ||
907 | ieee80211_send_assoc(sdata); | |
908 | ||
909 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT); | |
910 | } | |
911 | ||
912 | void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, | |
913 | struct ieee80211_hdr *hdr) | |
914 | { | |
915 | /* | |
916 | * We can postpone the mgd.timer whenever receiving unicast frames | |
917 | * from AP because we know that the connection is working both ways | |
918 | * at that time. But multicast frames (and hence also beacons) must | |
919 | * be ignored here, because we need to trigger the timer during | |
920 | * data idle periods for sending the periodical probe request to | |
921 | * the AP. | |
922 | */ | |
923 | if (!is_multicast_ether_addr(hdr->addr1)) | |
924 | mod_timer(&sdata->u.mgd.timer, | |
925 | jiffies + IEEE80211_MONITORING_INTERVAL); | |
926 | } | |
927 | ||
928 | static void ieee80211_associated(struct ieee80211_sub_if_data *sdata) | |
929 | { | |
930 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
931 | struct ieee80211_local *local = sdata->local; | |
932 | struct sta_info *sta; | |
933 | int disassoc; | |
934 | ||
935 | /* TODO: start monitoring current AP signal quality and number of | |
936 | * missed beacons. Scan other channels every now and then and search | |
937 | * for better APs. */ | |
938 | /* TODO: remove expired BSSes */ | |
939 | ||
940 | ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED; | |
941 | ||
942 | rcu_read_lock(); | |
943 | ||
944 | sta = sta_info_get(local, ifmgd->bssid); | |
945 | if (!sta) { | |
946 | printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n", | |
947 | sdata->dev->name, ifmgd->bssid); | |
948 | disassoc = 1; | |
949 | } else { | |
950 | disassoc = 0; | |
951 | if (time_after(jiffies, | |
952 | sta->last_rx + IEEE80211_MONITORING_INTERVAL)) { | |
953 | if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) { | |
954 | printk(KERN_DEBUG "%s: No ProbeResp from " | |
955 | "current AP %pM - assume out of " | |
956 | "range\n", | |
957 | sdata->dev->name, ifmgd->bssid); | |
958 | disassoc = 1; | |
959 | } else | |
960 | ieee80211_send_probe_req(sdata, ifmgd->bssid, | |
961 | ifmgd->ssid, | |
962 | ifmgd->ssid_len, | |
963 | NULL, 0); | |
964 | ifmgd->flags ^= IEEE80211_STA_PROBEREQ_POLL; | |
965 | } else { | |
966 | ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL; | |
967 | if (time_after(jiffies, ifmgd->last_probe + | |
968 | IEEE80211_PROBE_INTERVAL)) { | |
969 | ifmgd->last_probe = jiffies; | |
970 | ieee80211_send_probe_req(sdata, ifmgd->bssid, | |
971 | ifmgd->ssid, | |
972 | ifmgd->ssid_len, | |
973 | NULL, 0); | |
974 | } | |
975 | } | |
976 | } | |
977 | ||
978 | rcu_read_unlock(); | |
979 | ||
980 | if (disassoc) | |
981 | ieee80211_set_disassoc(sdata, true, true, | |
982 | WLAN_REASON_PREV_AUTH_NOT_VALID); | |
983 | else | |
984 | mod_timer(&ifmgd->timer, jiffies + | |
985 | IEEE80211_MONITORING_INTERVAL); | |
986 | } | |
987 | ||
988 | ||
989 | static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata) | |
990 | { | |
991 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
992 | ||
993 | printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name); | |
994 | ifmgd->flags |= IEEE80211_STA_AUTHENTICATED; | |
995 | if (ifmgd->flags & IEEE80211_STA_EXT_SME) { | |
996 | /* Wait for SME to request association */ | |
997 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
998 | } else | |
999 | ieee80211_associate(sdata); | |
1000 | } | |
1001 | ||
1002 | ||
1003 | static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, | |
1004 | struct ieee80211_mgmt *mgmt, | |
1005 | size_t len) | |
1006 | { | |
1007 | u8 *pos; | |
1008 | struct ieee802_11_elems elems; | |
1009 | ||
1010 | pos = mgmt->u.auth.variable; | |
1011 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
1012 | if (!elems.challenge) | |
1013 | return; | |
1014 | ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg, | |
1015 | elems.challenge - 2, elems.challenge_len + 2, | |
1016 | sdata->u.mgd.bssid, 1); | |
1017 | sdata->u.mgd.auth_transaction = 4; | |
1018 | } | |
1019 | ||
1020 | static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, | |
1021 | struct ieee80211_mgmt *mgmt, | |
1022 | size_t len) | |
1023 | { | |
1024 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1025 | u16 auth_alg, auth_transaction, status_code; | |
1026 | ||
1027 | if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE) | |
1028 | return; | |
1029 | ||
1030 | if (len < 24 + 6) | |
1031 | return; | |
1032 | ||
1033 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0) | |
1034 | return; | |
1035 | ||
1036 | if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0) | |
1037 | return; | |
1038 | ||
1039 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
1040 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
1041 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
1042 | ||
1043 | if (auth_alg != ifmgd->auth_alg || | |
1044 | auth_transaction != ifmgd->auth_transaction) | |
1045 | return; | |
1046 | ||
1047 | if (status_code != WLAN_STATUS_SUCCESS) { | |
1048 | if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) { | |
1049 | u8 algs[3]; | |
1050 | const int num_algs = ARRAY_SIZE(algs); | |
1051 | int i, pos; | |
1052 | algs[0] = algs[1] = algs[2] = 0xff; | |
1053 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
1054 | algs[0] = WLAN_AUTH_OPEN; | |
1055 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
1056 | algs[1] = WLAN_AUTH_SHARED_KEY; | |
1057 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
1058 | algs[2] = WLAN_AUTH_LEAP; | |
1059 | if (ifmgd->auth_alg == WLAN_AUTH_OPEN) | |
1060 | pos = 0; | |
1061 | else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY) | |
1062 | pos = 1; | |
1063 | else | |
1064 | pos = 2; | |
1065 | for (i = 0; i < num_algs; i++) { | |
1066 | pos++; | |
1067 | if (pos >= num_algs) | |
1068 | pos = 0; | |
1069 | if (algs[pos] == ifmgd->auth_alg || | |
1070 | algs[pos] == 0xff) | |
1071 | continue; | |
1072 | if (algs[pos] == WLAN_AUTH_SHARED_KEY && | |
1073 | !ieee80211_sta_wep_configured(sdata)) | |
1074 | continue; | |
1075 | ifmgd->auth_alg = algs[pos]; | |
1076 | break; | |
1077 | } | |
1078 | } | |
1079 | return; | |
1080 | } | |
1081 | ||
1082 | switch (ifmgd->auth_alg) { | |
1083 | case WLAN_AUTH_OPEN: | |
1084 | case WLAN_AUTH_LEAP: | |
1085 | case WLAN_AUTH_FT: | |
1086 | ieee80211_auth_completed(sdata); | |
1087 | cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len); | |
1088 | break; | |
1089 | case WLAN_AUTH_SHARED_KEY: | |
1090 | if (ifmgd->auth_transaction == 4) { | |
1091 | ieee80211_auth_completed(sdata); | |
1092 | cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len); | |
1093 | } else | |
1094 | ieee80211_auth_challenge(sdata, mgmt, len); | |
1095 | break; | |
1096 | } | |
1097 | } | |
1098 | ||
1099 | ||
1100 | static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, | |
1101 | struct ieee80211_mgmt *mgmt, | |
1102 | size_t len) | |
1103 | { | |
1104 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1105 | u16 reason_code; | |
1106 | ||
1107 | if (len < 24 + 2) | |
1108 | return; | |
1109 | ||
1110 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN)) | |
1111 | return; | |
1112 | ||
1113 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
1114 | ||
1115 | if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED) | |
1116 | printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n", | |
1117 | sdata->dev->name, reason_code); | |
1118 | ||
1119 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) && | |
1120 | (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE || | |
1121 | ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE || | |
1122 | ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) { | |
1123 | ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; | |
1124 | mod_timer(&ifmgd->timer, jiffies + | |
1125 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1126 | } | |
1127 | ||
1128 | ieee80211_set_disassoc(sdata, true, false, 0); | |
1129 | ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED; | |
1130 | cfg80211_send_rx_deauth(sdata->dev, (u8 *) mgmt, len); | |
1131 | } | |
1132 | ||
1133 | ||
1134 | static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, | |
1135 | struct ieee80211_mgmt *mgmt, | |
1136 | size_t len) | |
1137 | { | |
1138 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1139 | u16 reason_code; | |
1140 | ||
1141 | if (len < 24 + 2) | |
1142 | return; | |
1143 | ||
1144 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN)) | |
1145 | return; | |
1146 | ||
1147 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
1148 | ||
1149 | if (ifmgd->flags & IEEE80211_STA_ASSOCIATED) | |
1150 | printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n", | |
1151 | sdata->dev->name, reason_code); | |
1152 | ||
1153 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) && | |
1154 | ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) { | |
1155 | ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE; | |
1156 | mod_timer(&ifmgd->timer, jiffies + | |
1157 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1158 | } | |
1159 | ||
1160 | ieee80211_set_disassoc(sdata, false, false, reason_code); | |
1161 | cfg80211_send_rx_disassoc(sdata->dev, (u8 *) mgmt, len); | |
1162 | } | |
1163 | ||
1164 | ||
1165 | static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, | |
1166 | struct ieee80211_mgmt *mgmt, | |
1167 | size_t len, | |
1168 | int reassoc) | |
1169 | { | |
1170 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1171 | struct ieee80211_local *local = sdata->local; | |
1172 | struct ieee80211_supported_band *sband; | |
1173 | struct sta_info *sta; | |
1174 | u32 rates, basic_rates; | |
1175 | u16 capab_info, status_code, aid; | |
1176 | struct ieee802_11_elems elems; | |
1177 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; | |
1178 | u8 *pos; | |
1179 | u32 changed = 0; | |
1180 | int i, j; | |
1181 | bool have_higher_than_11mbit = false, newsta = false; | |
1182 | u16 ap_ht_cap_flags; | |
1183 | ||
1184 | /* AssocResp and ReassocResp have identical structure, so process both | |
1185 | * of them in this function. */ | |
1186 | ||
1187 | if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE) | |
1188 | return; | |
1189 | ||
1190 | if (len < 24 + 6) | |
1191 | return; | |
1192 | ||
1193 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0) | |
1194 | return; | |
1195 | ||
1196 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
1197 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
1198 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
1199 | ||
1200 | printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x " | |
1201 | "status=%d aid=%d)\n", | |
1202 | sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa, | |
1203 | capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); | |
1204 | ||
1205 | pos = mgmt->u.assoc_resp.variable; | |
1206 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
1207 | ||
1208 | if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && | |
1209 | elems.timeout_int && elems.timeout_int_len == 5 && | |
1210 | elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) { | |
1211 | u32 tu, ms; | |
1212 | tu = get_unaligned_le32(elems.timeout_int + 1); | |
1213 | ms = tu * 1024 / 1000; | |
1214 | printk(KERN_DEBUG "%s: AP rejected association temporarily; " | |
1215 | "comeback duration %u TU (%u ms)\n", | |
1216 | sdata->dev->name, tu, ms); | |
1217 | if (ms > IEEE80211_ASSOC_TIMEOUT) | |
1218 | mod_timer(&ifmgd->timer, | |
1219 | jiffies + msecs_to_jiffies(ms)); | |
1220 | return; | |
1221 | } | |
1222 | ||
1223 | if (status_code != WLAN_STATUS_SUCCESS) { | |
1224 | printk(KERN_DEBUG "%s: AP denied association (code=%d)\n", | |
1225 | sdata->dev->name, status_code); | |
1226 | /* if this was a reassociation, ensure we try a "full" | |
1227 | * association next time. This works around some broken APs | |
1228 | * which do not correctly reject reassociation requests. */ | |
1229 | ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET; | |
1230 | return; | |
1231 | } | |
1232 | ||
1233 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) | |
1234 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " | |
1235 | "set\n", sdata->dev->name, aid); | |
1236 | aid &= ~(BIT(15) | BIT(14)); | |
1237 | ||
1238 | if (!elems.supp_rates) { | |
1239 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", | |
1240 | sdata->dev->name); | |
1241 | return; | |
1242 | } | |
1243 | ||
1244 | printk(KERN_DEBUG "%s: associated\n", sdata->dev->name); | |
1245 | ifmgd->aid = aid; | |
1246 | ifmgd->ap_capab = capab_info; | |
1247 | ||
1248 | kfree(ifmgd->assocresp_ies); | |
1249 | ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt); | |
1250 | ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL); | |
1251 | if (ifmgd->assocresp_ies) | |
1252 | memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len); | |
1253 | ||
1254 | rcu_read_lock(); | |
1255 | ||
1256 | /* Add STA entry for the AP */ | |
1257 | sta = sta_info_get(local, ifmgd->bssid); | |
1258 | if (!sta) { | |
1259 | newsta = true; | |
1260 | ||
1261 | sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC); | |
1262 | if (!sta) { | |
1263 | printk(KERN_DEBUG "%s: failed to alloc STA entry for" | |
1264 | " the AP\n", sdata->dev->name); | |
1265 | rcu_read_unlock(); | |
1266 | return; | |
1267 | } | |
1268 | ||
1269 | /* update new sta with its last rx activity */ | |
1270 | sta->last_rx = jiffies; | |
1271 | } | |
1272 | ||
1273 | /* | |
1274 | * FIXME: Do we really need to update the sta_info's information here? | |
1275 | * We already know about the AP (we found it in our list) so it | |
1276 | * should already be filled with the right info, no? | |
1277 | * As is stands, all this is racy because typically we assume | |
1278 | * the information that is filled in here (except flags) doesn't | |
1279 | * change while a STA structure is alive. As such, it should move | |
1280 | * to between the sta_info_alloc() and sta_info_insert() above. | |
1281 | */ | |
1282 | ||
1283 | set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP | | |
1284 | WLAN_STA_AUTHORIZED); | |
1285 | ||
1286 | rates = 0; | |
1287 | basic_rates = 0; | |
1288 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1289 | ||
1290 | for (i = 0; i < elems.supp_rates_len; i++) { | |
1291 | int rate = (elems.supp_rates[i] & 0x7f) * 5; | |
1292 | bool is_basic = !!(elems.supp_rates[i] & 0x80); | |
1293 | ||
1294 | if (rate > 110) | |
1295 | have_higher_than_11mbit = true; | |
1296 | ||
1297 | for (j = 0; j < sband->n_bitrates; j++) { | |
1298 | if (sband->bitrates[j].bitrate == rate) { | |
1299 | rates |= BIT(j); | |
1300 | if (is_basic) | |
1301 | basic_rates |= BIT(j); | |
1302 | break; | |
1303 | } | |
1304 | } | |
1305 | } | |
1306 | ||
1307 | for (i = 0; i < elems.ext_supp_rates_len; i++) { | |
1308 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; | |
1309 | bool is_basic = !!(elems.supp_rates[i] & 0x80); | |
1310 | ||
1311 | if (rate > 110) | |
1312 | have_higher_than_11mbit = true; | |
1313 | ||
1314 | for (j = 0; j < sband->n_bitrates; j++) { | |
1315 | if (sband->bitrates[j].bitrate == rate) { | |
1316 | rates |= BIT(j); | |
1317 | if (is_basic) | |
1318 | basic_rates |= BIT(j); | |
1319 | break; | |
1320 | } | |
1321 | } | |
1322 | } | |
1323 | ||
1324 | sta->sta.supp_rates[local->hw.conf.channel->band] = rates; | |
1325 | sdata->vif.bss_conf.basic_rates = basic_rates; | |
1326 | ||
1327 | /* cf. IEEE 802.11 9.2.12 */ | |
1328 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
1329 | have_higher_than_11mbit) | |
1330 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
1331 | else | |
1332 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
1333 | ||
1334 | /* If TKIP/WEP is used, no need to parse AP's HT capabilities */ | |
1335 | if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) | |
1336 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, | |
1337 | elems.ht_cap_elem, &sta->sta.ht_cap); | |
1338 | ||
1339 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
1340 | ||
1341 | rate_control_rate_init(sta); | |
1342 | ||
1343 | if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) | |
1344 | set_sta_flags(sta, WLAN_STA_MFP); | |
1345 | ||
1346 | if (elems.wmm_param) | |
1347 | set_sta_flags(sta, WLAN_STA_WME); | |
1348 | ||
1349 | if (newsta) { | |
1350 | int err = sta_info_insert(sta); | |
1351 | if (err) { | |
1352 | printk(KERN_DEBUG "%s: failed to insert STA entry for" | |
1353 | " the AP (error %d)\n", sdata->dev->name, err); | |
1354 | rcu_read_unlock(); | |
1355 | return; | |
1356 | } | |
1357 | } | |
1358 | ||
1359 | rcu_read_unlock(); | |
1360 | ||
1361 | if (elems.wmm_param) | |
1362 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, | |
1363 | elems.wmm_param_len); | |
1364 | ||
1365 | if (elems.ht_info_elem && elems.wmm_param && | |
1366 | (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) && | |
1367 | !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) | |
1368 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, | |
1369 | ap_ht_cap_flags); | |
1370 | ||
1371 | /* set AID and assoc capability, | |
1372 | * ieee80211_set_associated() will tell the driver */ | |
1373 | bss_conf->aid = aid; | |
1374 | bss_conf->assoc_capability = capab_info; | |
1375 | ieee80211_set_associated(sdata, changed); | |
1376 | ||
1377 | ieee80211_associated(sdata); | |
1378 | cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len); | |
1379 | } | |
1380 | ||
1381 | ||
1382 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, | |
1383 | struct ieee80211_mgmt *mgmt, | |
1384 | size_t len, | |
1385 | struct ieee80211_rx_status *rx_status, | |
1386 | struct ieee802_11_elems *elems, | |
1387 | bool beacon) | |
1388 | { | |
1389 | struct ieee80211_local *local = sdata->local; | |
1390 | int freq; | |
1391 | struct ieee80211_bss *bss; | |
1392 | struct ieee80211_channel *channel; | |
1393 | ||
1394 | if (elems->ds_params && elems->ds_params_len == 1) | |
1395 | freq = ieee80211_channel_to_frequency(elems->ds_params[0]); | |
1396 | else | |
1397 | freq = rx_status->freq; | |
1398 | ||
1399 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
1400 | ||
1401 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
1402 | return; | |
1403 | ||
1404 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, | |
1405 | channel, beacon); | |
1406 | if (!bss) | |
1407 | return; | |
1408 | ||
1409 | if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) && | |
1410 | (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) { | |
1411 | struct ieee80211_channel_sw_ie *sw_elem = | |
1412 | (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem; | |
1413 | ieee80211_process_chanswitch(sdata, sw_elem, bss); | |
1414 | } | |
1415 | ||
1416 | ieee80211_rx_bss_put(local, bss); | |
1417 | } | |
1418 | ||
1419 | ||
1420 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, | |
1421 | struct ieee80211_mgmt *mgmt, | |
1422 | size_t len, | |
1423 | struct ieee80211_rx_status *rx_status) | |
1424 | { | |
1425 | size_t baselen; | |
1426 | struct ieee802_11_elems elems; | |
1427 | ||
1428 | if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN)) | |
1429 | return; /* ignore ProbeResp to foreign address */ | |
1430 | ||
1431 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; | |
1432 | if (baselen > len) | |
1433 | return; | |
1434 | ||
1435 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
1436 | &elems); | |
1437 | ||
1438 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false); | |
1439 | ||
1440 | /* direct probe may be part of the association flow */ | |
1441 | if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE, | |
1442 | &sdata->u.mgd.request)) { | |
1443 | printk(KERN_DEBUG "%s direct probe responded\n", | |
1444 | sdata->dev->name); | |
1445 | ieee80211_authenticate(sdata); | |
1446 | } | |
1447 | } | |
1448 | ||
1449 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, | |
1450 | struct ieee80211_mgmt *mgmt, | |
1451 | size_t len, | |
1452 | struct ieee80211_rx_status *rx_status) | |
1453 | { | |
1454 | struct ieee80211_if_managed *ifmgd; | |
1455 | size_t baselen; | |
1456 | struct ieee802_11_elems elems; | |
1457 | struct ieee80211_local *local = sdata->local; | |
1458 | u32 changed = 0; | |
1459 | bool erp_valid, directed_tim; | |
1460 | u8 erp_value = 0; | |
1461 | ||
1462 | /* Process beacon from the current BSS */ | |
1463 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
1464 | if (baselen > len) | |
1465 | return; | |
1466 | ||
1467 | ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems); | |
1468 | ||
1469 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true); | |
1470 | ||
1471 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
1472 | return; | |
1473 | ||
1474 | ifmgd = &sdata->u.mgd; | |
1475 | ||
1476 | if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) || | |
1477 | memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0) | |
1478 | return; | |
1479 | ||
1480 | if (rx_status->freq != local->hw.conf.channel->center_freq) | |
1481 | return; | |
1482 | ||
1483 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, | |
1484 | elems.wmm_param_len); | |
1485 | ||
1486 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) { | |
1487 | directed_tim = ieee80211_check_tim(&elems, ifmgd->aid); | |
1488 | ||
1489 | if (directed_tim) { | |
1490 | if (local->hw.conf.dynamic_ps_timeout > 0) { | |
1491 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
1492 | ieee80211_hw_config(local, | |
1493 | IEEE80211_CONF_CHANGE_PS); | |
1494 | ieee80211_send_nullfunc(local, sdata, 0); | |
1495 | } else { | |
1496 | local->pspolling = true; | |
1497 | ||
1498 | /* | |
1499 | * Here is assumed that the driver will be | |
1500 | * able to send ps-poll frame and receive a | |
1501 | * response even though power save mode is | |
1502 | * enabled, but some drivers might require | |
1503 | * to disable power save here. This needs | |
1504 | * to be investigated. | |
1505 | */ | |
1506 | ieee80211_send_pspoll(local, sdata); | |
1507 | } | |
1508 | } | |
1509 | } | |
1510 | ||
1511 | if (elems.erp_info && elems.erp_info_len >= 1) { | |
1512 | erp_valid = true; | |
1513 | erp_value = elems.erp_info[0]; | |
1514 | } else { | |
1515 | erp_valid = false; | |
1516 | } | |
1517 | changed |= ieee80211_handle_bss_capability(sdata, | |
1518 | le16_to_cpu(mgmt->u.beacon.capab_info), | |
1519 | erp_valid, erp_value); | |
1520 | ||
1521 | ||
1522 | if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param && | |
1523 | !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) { | |
1524 | struct sta_info *sta; | |
1525 | struct ieee80211_supported_band *sband; | |
1526 | u16 ap_ht_cap_flags; | |
1527 | ||
1528 | rcu_read_lock(); | |
1529 | ||
1530 | sta = sta_info_get(local, ifmgd->bssid); | |
1531 | if (!sta) { | |
1532 | rcu_read_unlock(); | |
1533 | return; | |
1534 | } | |
1535 | ||
1536 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1537 | ||
1538 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, | |
1539 | elems.ht_cap_elem, &sta->sta.ht_cap); | |
1540 | ||
1541 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
1542 | ||
1543 | rcu_read_unlock(); | |
1544 | ||
1545 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, | |
1546 | ap_ht_cap_flags); | |
1547 | } | |
1548 | ||
1549 | if (elems.country_elem) { | |
1550 | /* Note we are only reviewing this on beacons | |
1551 | * for the BSSID we are associated to */ | |
1552 | regulatory_hint_11d(local->hw.wiphy, | |
1553 | elems.country_elem, elems.country_elem_len); | |
1554 | ||
1555 | /* TODO: IBSS also needs this */ | |
1556 | if (elems.pwr_constr_elem) | |
1557 | ieee80211_handle_pwr_constr(sdata, | |
1558 | le16_to_cpu(mgmt->u.probe_resp.capab_info), | |
1559 | elems.pwr_constr_elem, | |
1560 | elems.pwr_constr_elem_len); | |
1561 | } | |
1562 | ||
1563 | ieee80211_bss_info_change_notify(sdata, changed); | |
1564 | } | |
1565 | ||
1566 | ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, | |
1567 | struct sk_buff *skb, | |
1568 | struct ieee80211_rx_status *rx_status) | |
1569 | { | |
1570 | struct ieee80211_local *local = sdata->local; | |
1571 | struct ieee80211_mgmt *mgmt; | |
1572 | u16 fc; | |
1573 | ||
1574 | if (skb->len < 24) | |
1575 | return RX_DROP_MONITOR; | |
1576 | ||
1577 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1578 | fc = le16_to_cpu(mgmt->frame_control); | |
1579 | ||
1580 | switch (fc & IEEE80211_FCTL_STYPE) { | |
1581 | case IEEE80211_STYPE_PROBE_REQ: | |
1582 | case IEEE80211_STYPE_PROBE_RESP: | |
1583 | case IEEE80211_STYPE_BEACON: | |
1584 | memcpy(skb->cb, rx_status, sizeof(*rx_status)); | |
1585 | case IEEE80211_STYPE_AUTH: | |
1586 | case IEEE80211_STYPE_ASSOC_RESP: | |
1587 | case IEEE80211_STYPE_REASSOC_RESP: | |
1588 | case IEEE80211_STYPE_DEAUTH: | |
1589 | case IEEE80211_STYPE_DISASSOC: | |
1590 | skb_queue_tail(&sdata->u.mgd.skb_queue, skb); | |
1591 | queue_work(local->hw.workqueue, &sdata->u.mgd.work); | |
1592 | return RX_QUEUED; | |
1593 | } | |
1594 | ||
1595 | return RX_DROP_MONITOR; | |
1596 | } | |
1597 | ||
1598 | static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, | |
1599 | struct sk_buff *skb) | |
1600 | { | |
1601 | struct ieee80211_rx_status *rx_status; | |
1602 | struct ieee80211_mgmt *mgmt; | |
1603 | u16 fc; | |
1604 | ||
1605 | rx_status = (struct ieee80211_rx_status *) skb->cb; | |
1606 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1607 | fc = le16_to_cpu(mgmt->frame_control); | |
1608 | ||
1609 | switch (fc & IEEE80211_FCTL_STYPE) { | |
1610 | case IEEE80211_STYPE_PROBE_RESP: | |
1611 | ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, | |
1612 | rx_status); | |
1613 | break; | |
1614 | case IEEE80211_STYPE_BEACON: | |
1615 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, | |
1616 | rx_status); | |
1617 | break; | |
1618 | case IEEE80211_STYPE_AUTH: | |
1619 | ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); | |
1620 | break; | |
1621 | case IEEE80211_STYPE_ASSOC_RESP: | |
1622 | ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0); | |
1623 | break; | |
1624 | case IEEE80211_STYPE_REASSOC_RESP: | |
1625 | ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1); | |
1626 | break; | |
1627 | case IEEE80211_STYPE_DEAUTH: | |
1628 | ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); | |
1629 | break; | |
1630 | case IEEE80211_STYPE_DISASSOC: | |
1631 | ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); | |
1632 | break; | |
1633 | } | |
1634 | ||
1635 | kfree_skb(skb); | |
1636 | } | |
1637 | ||
1638 | static void ieee80211_sta_timer(unsigned long data) | |
1639 | { | |
1640 | struct ieee80211_sub_if_data *sdata = | |
1641 | (struct ieee80211_sub_if_data *) data; | |
1642 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1643 | struct ieee80211_local *local = sdata->local; | |
1644 | ||
1645 | set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); | |
1646 | queue_work(local->hw.workqueue, &ifmgd->work); | |
1647 | } | |
1648 | ||
1649 | static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata) | |
1650 | { | |
1651 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1652 | struct ieee80211_local *local = sdata->local; | |
1653 | ||
1654 | if (local->ops->reset_tsf) { | |
1655 | /* Reset own TSF to allow time synchronization work. */ | |
1656 | local->ops->reset_tsf(local_to_hw(local)); | |
1657 | } | |
1658 | ||
1659 | ifmgd->wmm_last_param_set = -1; /* allow any WMM update */ | |
1660 | ||
1661 | ||
1662 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
1663 | ifmgd->auth_alg = WLAN_AUTH_OPEN; | |
1664 | else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
1665 | ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY; | |
1666 | else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
1667 | ifmgd->auth_alg = WLAN_AUTH_LEAP; | |
1668 | else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_FT) | |
1669 | ifmgd->auth_alg = WLAN_AUTH_FT; | |
1670 | else | |
1671 | ifmgd->auth_alg = WLAN_AUTH_OPEN; | |
1672 | ifmgd->auth_transaction = -1; | |
1673 | ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED; | |
1674 | ifmgd->assoc_scan_tries = 0; | |
1675 | ifmgd->direct_probe_tries = 0; | |
1676 | ifmgd->auth_tries = 0; | |
1677 | ifmgd->assoc_tries = 0; | |
1678 | netif_tx_stop_all_queues(sdata->dev); | |
1679 | netif_carrier_off(sdata->dev); | |
1680 | } | |
1681 | ||
1682 | static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata) | |
1683 | { | |
1684 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1685 | struct ieee80211_local *local = sdata->local; | |
1686 | struct ieee80211_bss *bss; | |
1687 | u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid; | |
1688 | u8 ssid_len = ifmgd->ssid_len; | |
1689 | u16 capa_mask = WLAN_CAPABILITY_ESS; | |
1690 | u16 capa_val = WLAN_CAPABILITY_ESS; | |
1691 | struct ieee80211_channel *chan = local->oper_channel; | |
1692 | ||
1693 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) && | |
1694 | ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL | | |
1695 | IEEE80211_STA_AUTO_BSSID_SEL | | |
1696 | IEEE80211_STA_AUTO_CHANNEL_SEL)) { | |
1697 | capa_mask |= WLAN_CAPABILITY_PRIVACY; | |
1698 | if (sdata->default_key) | |
1699 | capa_val |= WLAN_CAPABILITY_PRIVACY; | |
1700 | } | |
1701 | ||
1702 | if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) | |
1703 | chan = NULL; | |
1704 | ||
1705 | if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL) | |
1706 | bssid = NULL; | |
1707 | ||
1708 | if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) { | |
1709 | ssid = NULL; | |
1710 | ssid_len = 0; | |
1711 | } | |
1712 | ||
1713 | bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan, | |
1714 | bssid, ssid, ssid_len, | |
1715 | capa_mask, capa_val); | |
1716 | ||
1717 | if (bss) { | |
1718 | ieee80211_set_freq(sdata, bss->cbss.channel->center_freq); | |
1719 | if (!(ifmgd->flags & IEEE80211_STA_SSID_SET)) | |
1720 | ieee80211_sta_set_ssid(sdata, bss->ssid, | |
1721 | bss->ssid_len); | |
1722 | ieee80211_sta_set_bssid(sdata, bss->cbss.bssid); | |
1723 | ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len, | |
1724 | bss->supp_rates); | |
1725 | if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED) | |
1726 | sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED; | |
1727 | else | |
1728 | sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED; | |
1729 | ||
1730 | /* Send out direct probe if no probe resp was received or | |
1731 | * the one we have is outdated | |
1732 | */ | |
1733 | if (!bss->last_probe_resp || | |
1734 | time_after(jiffies, bss->last_probe_resp | |
1735 | + IEEE80211_SCAN_RESULT_EXPIRE)) | |
1736 | ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; | |
1737 | else | |
1738 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; | |
1739 | ||
1740 | ieee80211_rx_bss_put(local, bss); | |
1741 | ieee80211_sta_reset_auth(sdata); | |
1742 | return 0; | |
1743 | } else { | |
1744 | if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) { | |
1745 | ifmgd->assoc_scan_tries++; | |
1746 | /* XXX maybe racy? */ | |
1747 | if (local->scan_req) | |
1748 | return -1; | |
1749 | memcpy(local->int_scan_req.ssids[0].ssid, | |
1750 | ifmgd->ssid, IEEE80211_MAX_SSID_LEN); | |
1751 | if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) | |
1752 | local->int_scan_req.ssids[0].ssid_len = 0; | |
1753 | else | |
1754 | local->int_scan_req.ssids[0].ssid_len = ifmgd->ssid_len; | |
1755 | ||
1756 | if (ieee80211_start_scan(sdata, &local->int_scan_req)) | |
1757 | ieee80211_scan_failed(local); | |
1758 | ||
1759 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; | |
1760 | set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request); | |
1761 | } else { | |
1762 | ifmgd->assoc_scan_tries = 0; | |
1763 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
1764 | } | |
1765 | } | |
1766 | return -1; | |
1767 | } | |
1768 | ||
1769 | ||
1770 | static void ieee80211_sta_work(struct work_struct *work) | |
1771 | { | |
1772 | struct ieee80211_sub_if_data *sdata = | |
1773 | container_of(work, struct ieee80211_sub_if_data, u.mgd.work); | |
1774 | struct ieee80211_local *local = sdata->local; | |
1775 | struct ieee80211_if_managed *ifmgd; | |
1776 | struct sk_buff *skb; | |
1777 | ||
1778 | if (!netif_running(sdata->dev)) | |
1779 | return; | |
1780 | ||
1781 | if (local->sw_scanning || local->hw_scanning) | |
1782 | return; | |
1783 | ||
1784 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) | |
1785 | return; | |
1786 | ifmgd = &sdata->u.mgd; | |
1787 | ||
1788 | while ((skb = skb_dequeue(&ifmgd->skb_queue))) | |
1789 | ieee80211_sta_rx_queued_mgmt(sdata, skb); | |
1790 | ||
1791 | if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE && | |
1792 | ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE && | |
1793 | ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE && | |
1794 | test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) { | |
1795 | /* | |
1796 | * The call to ieee80211_start_scan can fail but ieee80211_request_scan | |
1797 | * (which queued ieee80211_sta_work) did not return an error. Thus, call | |
1798 | * ieee80211_scan_failed here if ieee80211_start_scan fails in order to | |
1799 | * notify the scan requester. | |
1800 | */ | |
1801 | if (ieee80211_start_scan(sdata, local->scan_req)) | |
1802 | ieee80211_scan_failed(local); | |
1803 | return; | |
1804 | } | |
1805 | ||
1806 | if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) { | |
1807 | if (ieee80211_sta_config_auth(sdata)) | |
1808 | return; | |
1809 | clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); | |
1810 | } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request)) | |
1811 | return; | |
1812 | ||
1813 | switch (ifmgd->state) { | |
1814 | case IEEE80211_STA_MLME_DISABLED: | |
1815 | break; | |
1816 | case IEEE80211_STA_MLME_DIRECT_PROBE: | |
1817 | ieee80211_direct_probe(sdata); | |
1818 | break; | |
1819 | case IEEE80211_STA_MLME_AUTHENTICATE: | |
1820 | ieee80211_authenticate(sdata); | |
1821 | break; | |
1822 | case IEEE80211_STA_MLME_ASSOCIATE: | |
1823 | ieee80211_associate(sdata); | |
1824 | break; | |
1825 | case IEEE80211_STA_MLME_ASSOCIATED: | |
1826 | ieee80211_associated(sdata); | |
1827 | break; | |
1828 | default: | |
1829 | WARN_ON(1); | |
1830 | break; | |
1831 | } | |
1832 | ||
1833 | if (ieee80211_privacy_mismatch(sdata)) { | |
1834 | printk(KERN_DEBUG "%s: privacy configuration mismatch and " | |
1835 | "mixed-cell disabled - disassociate\n", sdata->dev->name); | |
1836 | ||
1837 | ieee80211_set_disassoc(sdata, false, true, | |
1838 | WLAN_REASON_UNSPECIFIED); | |
1839 | } | |
1840 | } | |
1841 | ||
1842 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) | |
1843 | { | |
1844 | if (sdata->vif.type == NL80211_IFTYPE_STATION) | |
1845 | queue_work(sdata->local->hw.workqueue, | |
1846 | &sdata->u.mgd.work); | |
1847 | } | |
1848 | ||
1849 | /* interface setup */ | |
1850 | void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) | |
1851 | { | |
1852 | struct ieee80211_if_managed *ifmgd; | |
1853 | ||
1854 | ifmgd = &sdata->u.mgd; | |
1855 | INIT_WORK(&ifmgd->work, ieee80211_sta_work); | |
1856 | INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); | |
1857 | setup_timer(&ifmgd->timer, ieee80211_sta_timer, | |
1858 | (unsigned long) sdata); | |
1859 | setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, | |
1860 | (unsigned long) sdata); | |
1861 | skb_queue_head_init(&ifmgd->skb_queue); | |
1862 | ||
1863 | ifmgd->capab = WLAN_CAPABILITY_ESS; | |
1864 | ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN | | |
1865 | IEEE80211_AUTH_ALG_SHARED_KEY; | |
1866 | ifmgd->flags |= IEEE80211_STA_CREATE_IBSS | | |
1867 | IEEE80211_STA_AUTO_BSSID_SEL | | |
1868 | IEEE80211_STA_AUTO_CHANNEL_SEL; | |
1869 | if (sdata->local->hw.queues >= 4) | |
1870 | ifmgd->flags |= IEEE80211_STA_WMM_ENABLED; | |
1871 | } | |
1872 | ||
1873 | /* configuration hooks */ | |
1874 | void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata) | |
1875 | { | |
1876 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1877 | struct ieee80211_local *local = sdata->local; | |
1878 | ||
1879 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) | |
1880 | return; | |
1881 | ||
1882 | if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET | | |
1883 | IEEE80211_STA_AUTO_BSSID_SEL)) && | |
1884 | (ifmgd->flags & (IEEE80211_STA_SSID_SET | | |
1885 | IEEE80211_STA_AUTO_SSID_SEL))) { | |
1886 | ||
1887 | if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) | |
1888 | ieee80211_set_disassoc(sdata, true, true, | |
1889 | WLAN_REASON_DEAUTH_LEAVING); | |
1890 | ||
1891 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) || | |
1892 | ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE) | |
1893 | set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request); | |
1894 | else if (ifmgd->flags & IEEE80211_STA_EXT_SME) | |
1895 | set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); | |
1896 | queue_work(local->hw.workqueue, &ifmgd->work); | |
1897 | } | |
1898 | } | |
1899 | ||
1900 | int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata) | |
1901 | { | |
1902 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1903 | ||
1904 | if (ifmgd->ssid_len) | |
1905 | ifmgd->flags |= IEEE80211_STA_SSID_SET; | |
1906 | else | |
1907 | ifmgd->flags &= ~IEEE80211_STA_SSID_SET; | |
1908 | ||
1909 | return 0; | |
1910 | } | |
1911 | ||
1912 | int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len) | |
1913 | { | |
1914 | struct ieee80211_if_managed *ifmgd; | |
1915 | ||
1916 | if (len > IEEE80211_MAX_SSID_LEN) | |
1917 | return -EINVAL; | |
1918 | ||
1919 | ifmgd = &sdata->u.mgd; | |
1920 | ||
1921 | if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) { | |
1922 | /* | |
1923 | * Do not use reassociation if SSID is changed (different ESS). | |
1924 | */ | |
1925 | ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET; | |
1926 | memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid)); | |
1927 | memcpy(ifmgd->ssid, ssid, len); | |
1928 | ifmgd->ssid_len = len; | |
1929 | } | |
1930 | ||
1931 | return ieee80211_sta_commit(sdata); | |
1932 | } | |
1933 | ||
1934 | int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len) | |
1935 | { | |
1936 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1937 | memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len); | |
1938 | *len = ifmgd->ssid_len; | |
1939 | return 0; | |
1940 | } | |
1941 | ||
1942 | int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid) | |
1943 | { | |
1944 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1945 | ||
1946 | if (is_valid_ether_addr(bssid)) { | |
1947 | memcpy(ifmgd->bssid, bssid, ETH_ALEN); | |
1948 | ifmgd->flags |= IEEE80211_STA_BSSID_SET; | |
1949 | } else { | |
1950 | memset(ifmgd->bssid, 0, ETH_ALEN); | |
1951 | ifmgd->flags &= ~IEEE80211_STA_BSSID_SET; | |
1952 | } | |
1953 | ||
1954 | if (netif_running(sdata->dev)) { | |
1955 | if (ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID)) { | |
1956 | printk(KERN_DEBUG "%s: Failed to config new BSSID to " | |
1957 | "the low-level driver\n", sdata->dev->name); | |
1958 | } | |
1959 | } | |
1960 | ||
1961 | return ieee80211_sta_commit(sdata); | |
1962 | } | |
1963 | ||
1964 | int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, | |
1965 | const char *ie, size_t len) | |
1966 | { | |
1967 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1968 | ||
1969 | kfree(ifmgd->extra_ie); | |
1970 | if (len == 0) { | |
1971 | ifmgd->extra_ie = NULL; | |
1972 | ifmgd->extra_ie_len = 0; | |
1973 | return 0; | |
1974 | } | |
1975 | ifmgd->extra_ie = kmalloc(len, GFP_KERNEL); | |
1976 | if (!ifmgd->extra_ie) { | |
1977 | ifmgd->extra_ie_len = 0; | |
1978 | return -ENOMEM; | |
1979 | } | |
1980 | memcpy(ifmgd->extra_ie, ie, len); | |
1981 | ifmgd->extra_ie_len = len; | |
1982 | return 0; | |
1983 | } | |
1984 | ||
1985 | int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason) | |
1986 | { | |
1987 | printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n", | |
1988 | sdata->dev->name, reason); | |
1989 | ||
1990 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
1991 | return -EINVAL; | |
1992 | ||
1993 | ieee80211_set_disassoc(sdata, true, true, reason); | |
1994 | return 0; | |
1995 | } | |
1996 | ||
1997 | int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason) | |
1998 | { | |
1999 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2000 | ||
2001 | printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n", | |
2002 | sdata->dev->name, reason); | |
2003 | ||
2004 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
2005 | return -EINVAL; | |
2006 | ||
2007 | if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED)) | |
2008 | return -ENOLINK; | |
2009 | ||
2010 | ieee80211_set_disassoc(sdata, false, true, reason); | |
2011 | return 0; | |
2012 | } | |
2013 | ||
2014 | /* scan finished notification */ | |
2015 | void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) | |
2016 | { | |
2017 | struct ieee80211_sub_if_data *sdata = local->scan_sdata; | |
2018 | ||
2019 | /* Restart STA timers */ | |
2020 | rcu_read_lock(); | |
2021 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
2022 | ieee80211_restart_sta_timer(sdata); | |
2023 | rcu_read_unlock(); | |
2024 | } | |
2025 | ||
2026 | void ieee80211_dynamic_ps_disable_work(struct work_struct *work) | |
2027 | { | |
2028 | struct ieee80211_local *local = | |
2029 | container_of(work, struct ieee80211_local, | |
2030 | dynamic_ps_disable_work); | |
2031 | ||
2032 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { | |
2033 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
2034 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
2035 | } | |
2036 | ||
2037 | ieee80211_wake_queues_by_reason(&local->hw, | |
2038 | IEEE80211_QUEUE_STOP_REASON_PS); | |
2039 | } | |
2040 | ||
2041 | void ieee80211_dynamic_ps_enable_work(struct work_struct *work) | |
2042 | { | |
2043 | struct ieee80211_local *local = | |
2044 | container_of(work, struct ieee80211_local, | |
2045 | dynamic_ps_enable_work); | |
2046 | struct ieee80211_sub_if_data *sdata = local->scan_sdata; | |
2047 | ||
2048 | if (local->hw.conf.flags & IEEE80211_CONF_PS) | |
2049 | return; | |
2050 | ||
2051 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
2052 | ieee80211_send_nullfunc(local, sdata, 1); | |
2053 | ||
2054 | local->hw.conf.flags |= IEEE80211_CONF_PS; | |
2055 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
2056 | } | |
2057 | ||
2058 | void ieee80211_dynamic_ps_timer(unsigned long data) | |
2059 | { | |
2060 | struct ieee80211_local *local = (void *) data; | |
2061 | ||
2062 | queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work); | |
2063 | } | |
2064 | ||
2065 | void ieee80211_send_nullfunc(struct ieee80211_local *local, | |
2066 | struct ieee80211_sub_if_data *sdata, | |
2067 | int powersave) | |
2068 | { | |
2069 | struct sk_buff *skb; | |
2070 | struct ieee80211_hdr *nullfunc; | |
2071 | __le16 fc; | |
2072 | ||
2073 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) | |
2074 | return; | |
2075 | ||
2076 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24); | |
2077 | if (!skb) { | |
2078 | printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc " | |
2079 | "frame\n", sdata->dev->name); | |
2080 | return; | |
2081 | } | |
2082 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2083 | ||
2084 | nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24); | |
2085 | memset(nullfunc, 0, 24); | |
2086 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | | |
2087 | IEEE80211_FCTL_TODS); | |
2088 | if (powersave) | |
2089 | fc |= cpu_to_le16(IEEE80211_FCTL_PM); | |
2090 | nullfunc->frame_control = fc; | |
2091 | memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); | |
2092 | memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN); | |
2093 | memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
2094 | ||
2095 | ieee80211_tx_skb(sdata, skb, 0); | |
2096 | } |