]>
Commit | Line | Data |
---|---|---|
f0706e82 JB |
1 | /* |
2 | * BSS client mode implementation | |
3 | * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.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 | ||
5b323edb | 14 | #include <linux/delay.h> |
f0706e82 JB |
15 | #include <linux/if_ether.h> |
16 | #include <linux/skbuff.h> | |
f0706e82 JB |
17 | #include <linux/if_arp.h> |
18 | #include <linux/wireless.h> | |
19 | #include <linux/random.h> | |
20 | #include <linux/etherdevice.h> | |
d0709a65 | 21 | #include <linux/rtnetlink.h> |
f0706e82 | 22 | #include <net/iw_handler.h> |
f0706e82 | 23 | #include <net/mac80211.h> |
472dbc45 | 24 | #include <asm/unaligned.h> |
60f8b39c | 25 | |
f0706e82 | 26 | #include "ieee80211_i.h" |
2c8dccc7 JB |
27 | #include "rate.h" |
28 | #include "led.h" | |
f0706e82 | 29 | |
6042a3e3 | 30 | #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2 |
f0706e82 JB |
31 | #define IEEE80211_AUTH_TIMEOUT (HZ / 5) |
32 | #define IEEE80211_AUTH_MAX_TRIES 3 | |
33 | #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) | |
34 | #define IEEE80211_ASSOC_MAX_TRIES 3 | |
35 | #define IEEE80211_MONITORING_INTERVAL (2 * HZ) | |
36 | #define IEEE80211_PROBE_INTERVAL (60 * HZ) | |
37 | #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ) | |
38 | #define IEEE80211_SCAN_INTERVAL (2 * HZ) | |
39 | #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ) | |
872ba533 | 40 | #define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ) |
f0706e82 | 41 | |
f0706e82 JB |
42 | #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ) |
43 | #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ) | |
44 | ||
45 | #define IEEE80211_IBSS_MAX_STA_ENTRIES 128 | |
46 | ||
47 | ||
5484e237 JB |
48 | /* utils */ |
49 | static int ecw2cw(int ecw) | |
60f8b39c | 50 | { |
5484e237 | 51 | return (1 << ecw) - 1; |
60f8b39c JB |
52 | } |
53 | ||
c2b13452 | 54 | static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie) |
43ac2ca3 JM |
55 | { |
56 | u8 *end, *pos; | |
57 | ||
58 | pos = bss->ies; | |
59 | if (pos == NULL) | |
60 | return NULL; | |
61 | end = pos + bss->ies_len; | |
62 | ||
63 | while (pos + 1 < end) { | |
64 | if (pos + 2 + pos[1] > end) | |
65 | break; | |
66 | if (pos[0] == ie) | |
67 | return pos; | |
68 | pos += 2 + pos[1]; | |
69 | } | |
70 | ||
71 | return NULL; | |
72 | } | |
73 | ||
c2b13452 | 74 | static int ieee80211_compatible_rates(struct ieee80211_bss *bss, |
9ac19a90 JB |
75 | struct ieee80211_supported_band *sband, |
76 | u64 *rates) | |
77 | { | |
78 | int i, j, count; | |
79 | *rates = 0; | |
80 | count = 0; | |
81 | for (i = 0; i < bss->supp_rates_len; i++) { | |
82 | int rate = (bss->supp_rates[i] & 0x7F) * 5; | |
83 | ||
84 | for (j = 0; j < sband->n_bitrates; j++) | |
85 | if (sband->bitrates[j].bitrate == rate) { | |
86 | *rates |= BIT(j); | |
87 | count++; | |
88 | break; | |
89 | } | |
90 | } | |
91 | ||
92 | return count; | |
93 | } | |
94 | ||
9c6bd790 JB |
95 | /* also used by mesh code */ |
96 | u64 ieee80211_sta_get_rates(struct ieee80211_local *local, | |
97 | struct ieee802_11_elems *elems, | |
98 | enum ieee80211_band band) | |
60f8b39c | 99 | { |
9c6bd790 JB |
100 | struct ieee80211_supported_band *sband; |
101 | struct ieee80211_rate *bitrates; | |
102 | size_t num_rates; | |
103 | u64 supp_rates; | |
104 | int i, j; | |
105 | sband = local->hw.wiphy->bands[band]; | |
60f8b39c | 106 | |
9c6bd790 JB |
107 | if (!sband) { |
108 | WARN_ON(1); | |
109 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
60f8b39c | 110 | } |
60f8b39c | 111 | |
9c6bd790 JB |
112 | bitrates = sband->bitrates; |
113 | num_rates = sband->n_bitrates; | |
114 | supp_rates = 0; | |
115 | for (i = 0; i < elems->supp_rates_len + | |
116 | elems->ext_supp_rates_len; i++) { | |
117 | u8 rate = 0; | |
118 | int own_rate; | |
119 | if (i < elems->supp_rates_len) | |
120 | rate = elems->supp_rates[i]; | |
121 | else if (elems->ext_supp_rates) | |
122 | rate = elems->ext_supp_rates | |
123 | [i - elems->supp_rates_len]; | |
124 | own_rate = 5 * (rate & 0x7f); | |
125 | for (j = 0; j < num_rates; j++) | |
126 | if (bitrates[j].bitrate == own_rate) | |
127 | supp_rates |= BIT(j); | |
128 | } | |
129 | return supp_rates; | |
60f8b39c JB |
130 | } |
131 | ||
9c6bd790 JB |
132 | /* frame sending functions */ |
133 | ||
134 | /* also used by scanning code */ | |
0a51b27e JB |
135 | void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst, |
136 | u8 *ssid, size_t ssid_len) | |
60f8b39c JB |
137 | { |
138 | struct ieee80211_local *local = sdata->local; | |
139 | struct ieee80211_supported_band *sband; | |
140 | struct sk_buff *skb; | |
141 | struct ieee80211_mgmt *mgmt; | |
142 | u8 *pos, *supp_rates, *esupp_rates = NULL; | |
143 | int i; | |
144 | ||
145 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200); | |
146 | if (!skb) { | |
147 | printk(KERN_DEBUG "%s: failed to allocate buffer for probe " | |
148 | "request\n", sdata->dev->name); | |
149 | return; | |
150 | } | |
151 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
152 | ||
153 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
154 | memset(mgmt, 0, 24); | |
155 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
156 | IEEE80211_STYPE_PROBE_REQ); | |
157 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); | |
158 | if (dst) { | |
159 | memcpy(mgmt->da, dst, ETH_ALEN); | |
160 | memcpy(mgmt->bssid, dst, ETH_ALEN); | |
161 | } else { | |
162 | memset(mgmt->da, 0xff, ETH_ALEN); | |
163 | memset(mgmt->bssid, 0xff, ETH_ALEN); | |
164 | } | |
165 | pos = skb_put(skb, 2 + ssid_len); | |
166 | *pos++ = WLAN_EID_SSID; | |
167 | *pos++ = ssid_len; | |
168 | memcpy(pos, ssid, ssid_len); | |
169 | ||
170 | supp_rates = skb_put(skb, 2); | |
171 | supp_rates[0] = WLAN_EID_SUPP_RATES; | |
172 | supp_rates[1] = 0; | |
173 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
174 | ||
175 | for (i = 0; i < sband->n_bitrates; i++) { | |
176 | struct ieee80211_rate *rate = &sband->bitrates[i]; | |
177 | if (esupp_rates) { | |
178 | pos = skb_put(skb, 1); | |
179 | esupp_rates[1]++; | |
180 | } else if (supp_rates[1] == 8) { | |
181 | esupp_rates = skb_put(skb, 3); | |
182 | esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES; | |
183 | esupp_rates[1] = 1; | |
184 | pos = &esupp_rates[2]; | |
185 | } else { | |
186 | pos = skb_put(skb, 1); | |
187 | supp_rates[1]++; | |
188 | } | |
189 | *pos = rate->bitrate / 5; | |
190 | } | |
191 | ||
e50db65c | 192 | ieee80211_tx_skb(sdata, skb, 0); |
60f8b39c JB |
193 | } |
194 | ||
9c6bd790 JB |
195 | static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, |
196 | struct ieee80211_if_sta *ifsta, | |
197 | int transaction, u8 *extra, size_t extra_len, | |
198 | int encrypt) | |
199 | { | |
200 | struct ieee80211_local *local = sdata->local; | |
201 | struct sk_buff *skb; | |
202 | struct ieee80211_mgmt *mgmt; | |
203 | ||
204 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
205 | sizeof(*mgmt) + 6 + extra_len); | |
206 | if (!skb) { | |
207 | printk(KERN_DEBUG "%s: failed to allocate buffer for auth " | |
208 | "frame\n", sdata->dev->name); | |
209 | return; | |
210 | } | |
211 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
212 | ||
213 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); | |
214 | memset(mgmt, 0, 24 + 6); | |
215 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
216 | IEEE80211_STYPE_AUTH); | |
217 | if (encrypt) | |
218 | mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
219 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
220 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); | |
221 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
222 | mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg); | |
223 | mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); | |
224 | ifsta->auth_transaction = transaction + 1; | |
225 | mgmt->u.auth.status_code = cpu_to_le16(0); | |
226 | if (extra) | |
227 | memcpy(skb_put(skb, extra_len), extra, extra_len); | |
228 | ||
229 | ieee80211_tx_skb(sdata, skb, encrypt); | |
230 | } | |
231 | ||
9ac19a90 JB |
232 | static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata, |
233 | struct ieee80211_if_sta *ifsta) | |
234 | { | |
235 | struct ieee80211_local *local = sdata->local; | |
236 | struct sk_buff *skb; | |
237 | struct ieee80211_mgmt *mgmt; | |
d9fe60de | 238 | u8 *pos, *ies, *ht_ie; |
9ac19a90 JB |
239 | int i, len, count, rates_len, supp_rates_len; |
240 | u16 capab; | |
c2b13452 | 241 | struct ieee80211_bss *bss; |
9ac19a90 JB |
242 | int wmm = 0; |
243 | struct ieee80211_supported_band *sband; | |
244 | u64 rates = 0; | |
245 | ||
246 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
247 | sizeof(*mgmt) + 200 + ifsta->extra_ie_len + | |
248 | ifsta->ssid_len); | |
249 | if (!skb) { | |
250 | printk(KERN_DEBUG "%s: failed to allocate buffer for assoc " | |
251 | "frame\n", sdata->dev->name); | |
252 | return; | |
253 | } | |
254 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
255 | ||
256 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
257 | ||
258 | capab = ifsta->capab; | |
259 | ||
260 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) { | |
261 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) | |
262 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; | |
263 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) | |
264 | capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; | |
265 | } | |
266 | ||
267 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, | |
268 | local->hw.conf.channel->center_freq, | |
269 | ifsta->ssid, ifsta->ssid_len); | |
270 | if (bss) { | |
271 | if (bss->capability & WLAN_CAPABILITY_PRIVACY) | |
272 | capab |= WLAN_CAPABILITY_PRIVACY; | |
273 | if (bss->wmm_used) | |
274 | wmm = 1; | |
275 | ||
276 | /* get all rates supported by the device and the AP as | |
277 | * some APs don't like getting a superset of their rates | |
278 | * in the association request (e.g. D-Link DAP 1353 in | |
279 | * b-only mode) */ | |
280 | rates_len = ieee80211_compatible_rates(bss, sband, &rates); | |
281 | ||
282 | if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && | |
283 | (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)) | |
284 | capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; | |
285 | ||
286 | ieee80211_rx_bss_put(local, bss); | |
287 | } else { | |
288 | rates = ~0; | |
289 | rates_len = sband->n_bitrates; | |
290 | } | |
291 | ||
292 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
293 | memset(mgmt, 0, 24); | |
294 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
295 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); | |
296 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
297 | ||
298 | if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) { | |
299 | skb_put(skb, 10); | |
300 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
301 | IEEE80211_STYPE_REASSOC_REQ); | |
302 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); | |
303 | mgmt->u.reassoc_req.listen_interval = | |
304 | cpu_to_le16(local->hw.conf.listen_interval); | |
305 | memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid, | |
306 | ETH_ALEN); | |
307 | } else { | |
308 | skb_put(skb, 4); | |
309 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
310 | IEEE80211_STYPE_ASSOC_REQ); | |
311 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); | |
13554121 | 312 | mgmt->u.assoc_req.listen_interval = |
9ac19a90 JB |
313 | cpu_to_le16(local->hw.conf.listen_interval); |
314 | } | |
315 | ||
316 | /* SSID */ | |
317 | ies = pos = skb_put(skb, 2 + ifsta->ssid_len); | |
318 | *pos++ = WLAN_EID_SSID; | |
319 | *pos++ = ifsta->ssid_len; | |
320 | memcpy(pos, ifsta->ssid, ifsta->ssid_len); | |
321 | ||
322 | /* add all rates which were marked to be used above */ | |
323 | supp_rates_len = rates_len; | |
324 | if (supp_rates_len > 8) | |
325 | supp_rates_len = 8; | |
326 | ||
327 | len = sband->n_bitrates; | |
328 | pos = skb_put(skb, supp_rates_len + 2); | |
329 | *pos++ = WLAN_EID_SUPP_RATES; | |
330 | *pos++ = supp_rates_len; | |
331 | ||
332 | count = 0; | |
333 | for (i = 0; i < sband->n_bitrates; i++) { | |
334 | if (BIT(i) & rates) { | |
335 | int rate = sband->bitrates[i].bitrate; | |
336 | *pos++ = (u8) (rate / 5); | |
337 | if (++count == 8) | |
338 | break; | |
339 | } | |
340 | } | |
341 | ||
342 | if (rates_len > count) { | |
343 | pos = skb_put(skb, rates_len - count + 2); | |
344 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
345 | *pos++ = rates_len - count; | |
346 | ||
347 | for (i++; i < sband->n_bitrates; i++) { | |
348 | if (BIT(i) & rates) { | |
349 | int rate = sband->bitrates[i].bitrate; | |
350 | *pos++ = (u8) (rate / 5); | |
351 | } | |
352 | } | |
353 | } | |
354 | ||
355 | if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { | |
356 | /* 1. power capabilities */ | |
357 | pos = skb_put(skb, 4); | |
358 | *pos++ = WLAN_EID_PWR_CAPABILITY; | |
359 | *pos++ = 2; | |
360 | *pos++ = 0; /* min tx power */ | |
361 | *pos++ = local->hw.conf.channel->max_power; /* max tx power */ | |
362 | ||
363 | /* 2. supported channels */ | |
364 | /* TODO: get this in reg domain format */ | |
365 | pos = skb_put(skb, 2 * sband->n_channels + 2); | |
366 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; | |
367 | *pos++ = 2 * sband->n_channels; | |
368 | for (i = 0; i < sband->n_channels; i++) { | |
369 | *pos++ = ieee80211_frequency_to_channel( | |
370 | sband->channels[i].center_freq); | |
371 | *pos++ = 1; /* one channel in the subband*/ | |
372 | } | |
373 | } | |
374 | ||
375 | if (ifsta->extra_ie) { | |
376 | pos = skb_put(skb, ifsta->extra_ie_len); | |
377 | memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len); | |
378 | } | |
379 | ||
380 | if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) { | |
381 | pos = skb_put(skb, 9); | |
382 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
383 | *pos++ = 7; /* len */ | |
384 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ | |
385 | *pos++ = 0x50; | |
386 | *pos++ = 0xf2; | |
387 | *pos++ = 2; /* WME */ | |
388 | *pos++ = 0; /* WME info */ | |
389 | *pos++ = 1; /* WME ver */ | |
390 | *pos++ = 0; | |
391 | } | |
392 | ||
393 | /* wmm support is a must to HT */ | |
eb46936b VT |
394 | /* |
395 | * IEEE802.11n does not allow TKIP/WEP as pairwise | |
396 | * ciphers in HT mode. We still associate in non-ht | |
397 | * mode (11a/b/g) if any one of these ciphers is | |
398 | * configured as pairwise. | |
399 | */ | |
9ac19a90 | 400 | if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) && |
d9fe60de JB |
401 | sband->ht_cap.ht_supported && |
402 | (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) && | |
eb46936b VT |
403 | ht_ie[1] >= sizeof(struct ieee80211_ht_info) && |
404 | (!(ifsta->flags & IEEE80211_STA_TKIP_WEP_USED))) { | |
d9fe60de JB |
405 | struct ieee80211_ht_info *ht_info = |
406 | (struct ieee80211_ht_info *)(ht_ie + 2); | |
407 | u16 cap = sband->ht_cap.cap; | |
9ac19a90 JB |
408 | __le16 tmp; |
409 | u32 flags = local->hw.conf.channel->flags; | |
410 | ||
d9fe60de JB |
411 | switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { |
412 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
9ac19a90 | 413 | if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) { |
d9fe60de | 414 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
9ac19a90 JB |
415 | cap &= ~IEEE80211_HT_CAP_SGI_40; |
416 | } | |
417 | break; | |
d9fe60de | 418 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: |
9ac19a90 | 419 | if (flags & IEEE80211_CHAN_NO_FAT_BELOW) { |
d9fe60de | 420 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
9ac19a90 JB |
421 | cap &= ~IEEE80211_HT_CAP_SGI_40; |
422 | } | |
423 | break; | |
424 | } | |
425 | ||
426 | tmp = cpu_to_le16(cap); | |
427 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2); | |
428 | *pos++ = WLAN_EID_HT_CAPABILITY; | |
429 | *pos++ = sizeof(struct ieee80211_ht_cap); | |
430 | memset(pos, 0, sizeof(struct ieee80211_ht_cap)); | |
431 | memcpy(pos, &tmp, sizeof(u16)); | |
432 | pos += sizeof(u16); | |
433 | /* TODO: needs a define here for << 2 */ | |
d9fe60de JB |
434 | *pos++ = sband->ht_cap.ampdu_factor | |
435 | (sband->ht_cap.ampdu_density << 2); | |
436 | memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs)); | |
9ac19a90 JB |
437 | } |
438 | ||
439 | kfree(ifsta->assocreq_ies); | |
440 | ifsta->assocreq_ies_len = (skb->data + skb->len) - ies; | |
441 | ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL); | |
442 | if (ifsta->assocreq_ies) | |
443 | memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len); | |
444 | ||
e50db65c | 445 | ieee80211_tx_skb(sdata, skb, 0); |
9ac19a90 JB |
446 | } |
447 | ||
448 | ||
ef422bc0 JB |
449 | static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, |
450 | u16 stype, u16 reason) | |
9ac19a90 JB |
451 | { |
452 | struct ieee80211_local *local = sdata->local; | |
ef422bc0 | 453 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
9ac19a90 JB |
454 | struct sk_buff *skb; |
455 | struct ieee80211_mgmt *mgmt; | |
456 | ||
457 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); | |
458 | if (!skb) { | |
ef422bc0 JB |
459 | printk(KERN_DEBUG "%s: failed to allocate buffer for " |
460 | "deauth/disassoc frame\n", sdata->dev->name); | |
9ac19a90 JB |
461 | return; |
462 | } | |
463 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
464 | ||
465 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
466 | memset(mgmt, 0, 24); | |
467 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
468 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); | |
469 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
ef422bc0 | 470 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); |
9ac19a90 | 471 | skb_put(skb, 2); |
ef422bc0 | 472 | /* u.deauth.reason_code == u.disassoc.reason_code */ |
9ac19a90 JB |
473 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); |
474 | ||
e50db65c | 475 | ieee80211_tx_skb(sdata, skb, 0); |
9ac19a90 JB |
476 | } |
477 | ||
60f8b39c | 478 | /* MLME */ |
f698d856 | 479 | static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata, |
c2b13452 | 480 | struct ieee80211_bss *bss) |
e2839d8f | 481 | { |
e2839d8f VK |
482 | struct ieee80211_local *local = sdata->local; |
483 | int i, have_higher_than_11mbit = 0; | |
484 | ||
e2839d8f VK |
485 | /* cf. IEEE 802.11 9.2.12 */ |
486 | for (i = 0; i < bss->supp_rates_len; i++) | |
487 | if ((bss->supp_rates[i] & 0x7f) * 5 > 110) | |
488 | have_higher_than_11mbit = 1; | |
489 | ||
490 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
491 | have_higher_than_11mbit) | |
492 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
493 | else | |
494 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
495 | ||
3d35f7c6 | 496 | ieee80211_set_wmm_default(sdata); |
e2839d8f VK |
497 | } |
498 | ||
f698d856 | 499 | static void ieee80211_sta_wmm_params(struct ieee80211_local *local, |
f0706e82 JB |
500 | struct ieee80211_if_sta *ifsta, |
501 | u8 *wmm_param, size_t wmm_param_len) | |
502 | { | |
f0706e82 JB |
503 | struct ieee80211_tx_queue_params params; |
504 | size_t left; | |
505 | int count; | |
506 | u8 *pos; | |
507 | ||
3434fbd3 JB |
508 | if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED)) |
509 | return; | |
510 | ||
511 | if (!wmm_param) | |
512 | return; | |
513 | ||
f0706e82 JB |
514 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) |
515 | return; | |
516 | count = wmm_param[6] & 0x0f; | |
517 | if (count == ifsta->wmm_last_param_set) | |
518 | return; | |
519 | ifsta->wmm_last_param_set = count; | |
520 | ||
521 | pos = wmm_param + 8; | |
522 | left = wmm_param_len - 8; | |
523 | ||
524 | memset(¶ms, 0, sizeof(params)); | |
525 | ||
526 | if (!local->ops->conf_tx) | |
527 | return; | |
528 | ||
529 | local->wmm_acm = 0; | |
530 | for (; left >= 4; left -= 4, pos += 4) { | |
531 | int aci = (pos[0] >> 5) & 0x03; | |
532 | int acm = (pos[0] >> 4) & 0x01; | |
533 | int queue; | |
534 | ||
535 | switch (aci) { | |
536 | case 1: | |
e100bb64 | 537 | queue = 3; |
988c0f72 | 538 | if (acm) |
f0706e82 | 539 | local->wmm_acm |= BIT(0) | BIT(3); |
f0706e82 JB |
540 | break; |
541 | case 2: | |
e100bb64 | 542 | queue = 1; |
988c0f72 | 543 | if (acm) |
f0706e82 | 544 | local->wmm_acm |= BIT(4) | BIT(5); |
f0706e82 JB |
545 | break; |
546 | case 3: | |
e100bb64 | 547 | queue = 0; |
988c0f72 | 548 | if (acm) |
f0706e82 | 549 | local->wmm_acm |= BIT(6) | BIT(7); |
f0706e82 JB |
550 | break; |
551 | case 0: | |
552 | default: | |
e100bb64 | 553 | queue = 2; |
988c0f72 | 554 | if (acm) |
f0706e82 | 555 | local->wmm_acm |= BIT(1) | BIT(2); |
f0706e82 JB |
556 | break; |
557 | } | |
558 | ||
559 | params.aifs = pos[0] & 0x0f; | |
560 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); | |
561 | params.cw_min = ecw2cw(pos[1] & 0x0f); | |
f434b2d1 | 562 | params.txop = get_unaligned_le16(pos + 2); |
f4ea83dd | 563 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
f0706e82 | 564 | printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d " |
3330d7be | 565 | "cWmin=%d cWmax=%d txop=%d\n", |
f698d856 | 566 | local->mdev->name, queue, aci, acm, params.aifs, params.cw_min, |
3330d7be JB |
567 | params.cw_max, params.txop); |
568 | #endif | |
f0706e82 JB |
569 | /* TODO: handle ACM (block TX, fallback to next lowest allowed |
570 | * AC for now) */ | |
571 | if (local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) { | |
572 | printk(KERN_DEBUG "%s: failed to set TX queue " | |
f698d856 | 573 | "parameters for queue %d\n", local->mdev->name, queue); |
f0706e82 JB |
574 | } |
575 | } | |
576 | } | |
577 | ||
7a5158ef JB |
578 | static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, |
579 | u16 capab, bool erp_valid, u8 erp) | |
5628221c | 580 | { |
bda3933a | 581 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
ebd74487 | 582 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
5628221c | 583 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
ebd74487 | 584 | #endif |
471b3efd | 585 | u32 changed = 0; |
7a5158ef JB |
586 | bool use_protection; |
587 | bool use_short_preamble; | |
588 | bool use_short_slot; | |
589 | ||
590 | if (erp_valid) { | |
591 | use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; | |
592 | use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; | |
593 | } else { | |
594 | use_protection = false; | |
595 | use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); | |
596 | } | |
597 | ||
598 | use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); | |
5628221c | 599 | |
471b3efd | 600 | if (use_protection != bss_conf->use_cts_prot) { |
f4ea83dd | 601 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
5628221c | 602 | if (net_ratelimit()) { |
0c68ae26 | 603 | printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n", |
471b3efd | 604 | sdata->dev->name, |
5628221c | 605 | use_protection ? "enabled" : "disabled", |
0c68ae26 | 606 | ifsta->bssid); |
5628221c | 607 | } |
f4ea83dd | 608 | #endif |
471b3efd JB |
609 | bss_conf->use_cts_prot = use_protection; |
610 | changed |= BSS_CHANGED_ERP_CTS_PROT; | |
5628221c | 611 | } |
7e9ed188 | 612 | |
d43c7b37 | 613 | if (use_short_preamble != bss_conf->use_short_preamble) { |
f4ea83dd | 614 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
7e9ed188 DD |
615 | if (net_ratelimit()) { |
616 | printk(KERN_DEBUG "%s: switched to %s barker preamble" | |
0c68ae26 | 617 | " (BSSID=%pM)\n", |
471b3efd | 618 | sdata->dev->name, |
d43c7b37 | 619 | use_short_preamble ? "short" : "long", |
0c68ae26 | 620 | ifsta->bssid); |
7e9ed188 | 621 | } |
f4ea83dd | 622 | #endif |
d43c7b37 | 623 | bss_conf->use_short_preamble = use_short_preamble; |
471b3efd | 624 | changed |= BSS_CHANGED_ERP_PREAMBLE; |
7e9ed188 | 625 | } |
d9430a32 | 626 | |
7a5158ef JB |
627 | if (use_short_slot != bss_conf->use_short_slot) { |
628 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
629 | if (net_ratelimit()) { | |
391429c1 CL |
630 | printk(KERN_DEBUG "%s: switched to %s slot time" |
631 | " (BSSID=%pM)\n", | |
7a5158ef JB |
632 | sdata->dev->name, |
633 | use_short_slot ? "short" : "long", | |
634 | ifsta->bssid); | |
635 | } | |
636 | #endif | |
637 | bss_conf->use_short_slot = use_short_slot; | |
638 | changed |= BSS_CHANGED_ERP_SLOT; | |
50c4afb9 JL |
639 | } |
640 | ||
641 | return changed; | |
642 | } | |
643 | ||
f5e5bf25 TW |
644 | static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata, |
645 | struct ieee80211_if_sta *ifsta) | |
646 | { | |
647 | union iwreq_data wrqu; | |
648 | memset(&wrqu, 0, sizeof(wrqu)); | |
649 | if (ifsta->flags & IEEE80211_STA_ASSOCIATED) | |
650 | memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN); | |
651 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; | |
652 | wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL); | |
653 | } | |
654 | ||
f698d856 | 655 | static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
656 | struct ieee80211_if_sta *ifsta) |
657 | { | |
74af0250 LT |
658 | char *buf; |
659 | size_t len; | |
660 | int i; | |
f0706e82 JB |
661 | union iwreq_data wrqu; |
662 | ||
74af0250 LT |
663 | if (!ifsta->assocreq_ies && !ifsta->assocresp_ies) |
664 | return; | |
665 | ||
666 | buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len + | |
667 | ifsta->assocresp_ies_len), GFP_KERNEL); | |
668 | if (!buf) | |
669 | return; | |
670 | ||
671 | len = sprintf(buf, "ASSOCINFO("); | |
f0706e82 | 672 | if (ifsta->assocreq_ies) { |
74af0250 LT |
673 | len += sprintf(buf + len, "ReqIEs="); |
674 | for (i = 0; i < ifsta->assocreq_ies_len; i++) { | |
675 | len += sprintf(buf + len, "%02x", | |
676 | ifsta->assocreq_ies[i]); | |
677 | } | |
f0706e82 | 678 | } |
087d833e | 679 | if (ifsta->assocresp_ies) { |
74af0250 LT |
680 | if (ifsta->assocreq_ies) |
681 | len += sprintf(buf + len, " "); | |
682 | len += sprintf(buf + len, "RespIEs="); | |
683 | for (i = 0; i < ifsta->assocresp_ies_len; i++) { | |
684 | len += sprintf(buf + len, "%02x", | |
685 | ifsta->assocresp_ies[i]); | |
686 | } | |
f0706e82 | 687 | } |
74af0250 LT |
688 | len += sprintf(buf + len, ")"); |
689 | ||
690 | if (len > IW_CUSTOM_MAX) { | |
691 | len = sprintf(buf, "ASSOCRESPIE="); | |
692 | for (i = 0; i < ifsta->assocresp_ies_len; i++) { | |
693 | len += sprintf(buf + len, "%02x", | |
694 | ifsta->assocresp_ies[i]); | |
695 | } | |
696 | } | |
697 | ||
ad788b5e JL |
698 | if (len <= IW_CUSTOM_MAX) { |
699 | memset(&wrqu, 0, sizeof(wrqu)); | |
700 | wrqu.data.length = len; | |
701 | wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf); | |
702 | } | |
74af0250 LT |
703 | |
704 | kfree(buf); | |
f0706e82 JB |
705 | } |
706 | ||
707 | ||
f698d856 | 708 | static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
ae5eb026 JB |
709 | struct ieee80211_if_sta *ifsta, |
710 | u32 bss_info_changed) | |
f0706e82 | 711 | { |
471b3efd | 712 | struct ieee80211_local *local = sdata->local; |
38668c05 | 713 | struct ieee80211_conf *conf = &local_to_hw(local)->conf; |
f0706e82 | 714 | |
c2b13452 | 715 | struct ieee80211_bss *bss; |
d6f2da5b | 716 | |
ae5eb026 | 717 | bss_info_changed |= BSS_CHANGED_ASSOC; |
f5e5bf25 | 718 | ifsta->flags |= IEEE80211_STA_ASSOCIATED; |
5628221c | 719 | |
05c914fe | 720 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
f5e5bf25 | 721 | return; |
21c0cbe7 | 722 | |
f5e5bf25 TW |
723 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
724 | conf->channel->center_freq, | |
725 | ifsta->ssid, ifsta->ssid_len); | |
726 | if (bss) { | |
727 | /* set timing information */ | |
bda3933a JB |
728 | sdata->vif.bss_conf.beacon_int = bss->beacon_int; |
729 | sdata->vif.bss_conf.timestamp = bss->timestamp; | |
730 | sdata->vif.bss_conf.dtim_period = bss->dtim_period; | |
21c0cbe7 | 731 | |
ae5eb026 | 732 | bss_info_changed |= ieee80211_handle_bss_capability(sdata, |
7a5158ef | 733 | bss->capability, bss->has_erp_value, bss->erp_value); |
9ac19a90 JB |
734 | |
735 | ieee80211_rx_bss_put(local, bss); | |
f0706e82 JB |
736 | } |
737 | ||
9ac19a90 JB |
738 | ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET; |
739 | memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN); | |
740 | ieee80211_sta_send_associnfo(sdata, ifsta); | |
9306102e | 741 | |
9ac19a90 JB |
742 | ifsta->last_probe = jiffies; |
743 | ieee80211_led_assoc(local, 1); | |
9306102e | 744 | |
bda3933a | 745 | sdata->vif.bss_conf.assoc = 1; |
96dd22ac JB |
746 | /* |
747 | * For now just always ask the driver to update the basic rateset | |
748 | * when we have associated, we aren't checking whether it actually | |
749 | * changed or not. | |
750 | */ | |
ae5eb026 JB |
751 | bss_info_changed |= BSS_CHANGED_BASIC_RATES; |
752 | ieee80211_bss_info_change_notify(sdata, bss_info_changed); | |
f0706e82 | 753 | |
869717fb VN |
754 | if (local->powersave && |
755 | !(local->hw.flags & IEEE80211_HW_NO_STACK_DYNAMIC_PS)) { | |
520eb820 KV |
756 | if (local->dynamic_ps_timeout > 0) |
757 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
758 | msecs_to_jiffies(local->dynamic_ps_timeout)); | |
759 | else { | |
760 | conf->flags |= IEEE80211_CONF_PS; | |
761 | ieee80211_hw_config(local, | |
762 | IEEE80211_CONF_CHANGE_PS); | |
763 | } | |
e0cb686f KV |
764 | } |
765 | ||
9ac19a90 JB |
766 | netif_tx_start_all_queues(sdata->dev); |
767 | netif_carrier_on(sdata->dev); | |
f0706e82 | 768 | |
9ac19a90 | 769 | ieee80211_sta_send_apinfo(sdata, ifsta); |
f0706e82 JB |
770 | } |
771 | ||
9ac19a90 JB |
772 | static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata, |
773 | struct ieee80211_if_sta *ifsta) | |
f0706e82 | 774 | { |
9ac19a90 JB |
775 | ifsta->direct_probe_tries++; |
776 | if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0c68ae26 JB |
777 | printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n", |
778 | sdata->dev->name, ifsta->bssid); | |
9ac19a90 | 779 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
4a68ec53 | 780 | ieee80211_sta_send_apinfo(sdata, ifsta); |
f0706e82 JB |
781 | return; |
782 | } | |
f0706e82 | 783 | |
0c68ae26 JB |
784 | printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n", |
785 | sdata->dev->name, ifsta->bssid, | |
9ac19a90 | 786 | ifsta->direct_probe_tries); |
f0706e82 | 787 | |
9ac19a90 | 788 | ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
f0706e82 | 789 | |
9ac19a90 JB |
790 | set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request); |
791 | ||
792 | /* Direct probe is sent to broadcast address as some APs | |
793 | * will not answer to direct packet in unassociated state. | |
794 | */ | |
795 | ieee80211_send_probe_req(sdata, NULL, | |
796 | ifsta->ssid, ifsta->ssid_len); | |
797 | ||
798 | mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT); | |
60f8b39c | 799 | } |
f0706e82 | 800 | |
9ac19a90 JB |
801 | |
802 | static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata, | |
803 | struct ieee80211_if_sta *ifsta) | |
f0706e82 | 804 | { |
9ac19a90 JB |
805 | ifsta->auth_tries++; |
806 | if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0c68ae26 | 807 | printk(KERN_DEBUG "%s: authentication with AP %pM" |
9ac19a90 | 808 | " timed out\n", |
0c68ae26 | 809 | sdata->dev->name, ifsta->bssid); |
9ac19a90 | 810 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
4a68ec53 | 811 | ieee80211_sta_send_apinfo(sdata, ifsta); |
f0706e82 JB |
812 | return; |
813 | } | |
f0706e82 | 814 | |
9ac19a90 | 815 | ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE; |
0c68ae26 JB |
816 | printk(KERN_DEBUG "%s: authenticate with AP %pM\n", |
817 | sdata->dev->name, ifsta->bssid); | |
f0706e82 | 818 | |
9ac19a90 JB |
819 | ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0); |
820 | ||
821 | mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT); | |
f0706e82 JB |
822 | } |
823 | ||
5925d976 VN |
824 | /* |
825 | * The disassoc 'reason' argument can be either our own reason | |
826 | * if self disconnected or a reason code from the AP. | |
827 | */ | |
aa458d17 TW |
828 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, |
829 | struct ieee80211_if_sta *ifsta, bool deauth, | |
830 | bool self_disconnected, u16 reason) | |
831 | { | |
832 | struct ieee80211_local *local = sdata->local; | |
833 | struct sta_info *sta; | |
e0cb686f | 834 | u32 changed = 0, config_changed = 0; |
aa458d17 TW |
835 | |
836 | rcu_read_lock(); | |
837 | ||
838 | sta = sta_info_get(local, ifsta->bssid); | |
839 | if (!sta) { | |
840 | rcu_read_unlock(); | |
841 | return; | |
842 | } | |
843 | ||
844 | if (deauth) { | |
845 | ifsta->direct_probe_tries = 0; | |
846 | ifsta->auth_tries = 0; | |
847 | } | |
848 | ifsta->assoc_scan_tries = 0; | |
849 | ifsta->assoc_tries = 0; | |
850 | ||
24e64622 | 851 | netif_tx_stop_all_queues(sdata->dev); |
aa458d17 TW |
852 | netif_carrier_off(sdata->dev); |
853 | ||
17741cdc | 854 | ieee80211_sta_tear_down_BA_sessions(sdata, sta->sta.addr); |
aa458d17 TW |
855 | |
856 | if (self_disconnected) { | |
857 | if (deauth) | |
ef422bc0 JB |
858 | ieee80211_send_deauth_disassoc(sdata, |
859 | IEEE80211_STYPE_DEAUTH, reason); | |
aa458d17 | 860 | else |
ef422bc0 JB |
861 | ieee80211_send_deauth_disassoc(sdata, |
862 | IEEE80211_STYPE_DISASSOC, reason); | |
aa458d17 TW |
863 | } |
864 | ||
f5e5bf25 TW |
865 | ifsta->flags &= ~IEEE80211_STA_ASSOCIATED; |
866 | changed |= ieee80211_reset_erp_info(sdata); | |
867 | ||
f5e5bf25 | 868 | ieee80211_led_assoc(local, 0); |
ae5eb026 JB |
869 | changed |= BSS_CHANGED_ASSOC; |
870 | sdata->vif.bss_conf.assoc = false; | |
f5e5bf25 TW |
871 | |
872 | ieee80211_sta_send_apinfo(sdata, ifsta); | |
aa458d17 | 873 | |
5925d976 | 874 | if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) |
aa458d17 TW |
875 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
876 | ||
aa458d17 TW |
877 | rcu_read_unlock(); |
878 | ||
ae5eb026 | 879 | local->hw.conf.ht.enabled = false; |
094d05dc | 880 | local->oper_channel_type = NL80211_CHAN_NO_HT; |
e0cb686f KV |
881 | config_changed |= IEEE80211_CONF_CHANGE_HT; |
882 | ||
520eb820 KV |
883 | del_timer_sync(&local->dynamic_ps_timer); |
884 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
885 | ||
e0cb686f KV |
886 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
887 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
888 | config_changed |= IEEE80211_CONF_CHANGE_PS; | |
889 | } | |
ae5eb026 | 890 | |
e0cb686f | 891 | ieee80211_hw_config(local, config_changed); |
ae5eb026 | 892 | ieee80211_bss_info_change_notify(sdata, changed); |
8e268e47 TW |
893 | |
894 | rcu_read_lock(); | |
895 | ||
896 | sta = sta_info_get(local, ifsta->bssid); | |
897 | if (!sta) { | |
898 | rcu_read_unlock(); | |
899 | return; | |
900 | } | |
901 | ||
902 | sta_info_unlink(&sta); | |
903 | ||
904 | rcu_read_unlock(); | |
905 | ||
906 | sta_info_destroy(sta); | |
aa458d17 | 907 | } |
f0706e82 | 908 | |
9ac19a90 JB |
909 | static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata) |
910 | { | |
911 | if (!sdata || !sdata->default_key || | |
912 | sdata->default_key->conf.alg != ALG_WEP) | |
913 | return 0; | |
914 | return 1; | |
915 | } | |
916 | ||
f698d856 | 917 | static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
918 | struct ieee80211_if_sta *ifsta) |
919 | { | |
f698d856 | 920 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 921 | struct ieee80211_bss *bss; |
5b98b1f7 JB |
922 | int bss_privacy; |
923 | int wep_privacy; | |
924 | int privacy_invoked; | |
f0706e82 | 925 | |
5b98b1f7 | 926 | if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL)) |
f0706e82 JB |
927 | return 0; |
928 | ||
f698d856 | 929 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
8318d78a | 930 | local->hw.conf.channel->center_freq, |
cffdd30d | 931 | ifsta->ssid, ifsta->ssid_len); |
f0706e82 JB |
932 | if (!bss) |
933 | return 0; | |
934 | ||
5b98b1f7 | 935 | bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY); |
f698d856 | 936 | wep_privacy = !!ieee80211_sta_wep_configured(sdata); |
5b98b1f7 | 937 | privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED); |
f0706e82 | 938 | |
3e122be0 | 939 | ieee80211_rx_bss_put(local, bss); |
f0706e82 | 940 | |
5b98b1f7 JB |
941 | if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked)) |
942 | return 0; | |
943 | ||
944 | return 1; | |
f0706e82 JB |
945 | } |
946 | ||
f698d856 | 947 | static void ieee80211_associate(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
948 | struct ieee80211_if_sta *ifsta) |
949 | { | |
950 | ifsta->assoc_tries++; | |
951 | if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) { | |
0c68ae26 | 952 | printk(KERN_DEBUG "%s: association with AP %pM" |
f0706e82 | 953 | " timed out\n", |
0c68ae26 | 954 | sdata->dev->name, ifsta->bssid); |
48c2fc59 | 955 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
4a68ec53 | 956 | ieee80211_sta_send_apinfo(sdata, ifsta); |
f0706e82 JB |
957 | return; |
958 | } | |
959 | ||
48c2fc59 | 960 | ifsta->state = IEEE80211_STA_MLME_ASSOCIATE; |
0c68ae26 JB |
961 | printk(KERN_DEBUG "%s: associate with AP %pM\n", |
962 | sdata->dev->name, ifsta->bssid); | |
f698d856 | 963 | if (ieee80211_privacy_mismatch(sdata, ifsta)) { |
f0706e82 | 964 | printk(KERN_DEBUG "%s: mismatch in privacy configuration and " |
f698d856 | 965 | "mixed-cell disabled - abort association\n", sdata->dev->name); |
48c2fc59 | 966 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
f0706e82 JB |
967 | return; |
968 | } | |
969 | ||
f698d856 | 970 | ieee80211_send_assoc(sdata, ifsta); |
f0706e82 JB |
971 | |
972 | mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT); | |
973 | } | |
974 | ||
975 | ||
f698d856 | 976 | static void ieee80211_associated(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
977 | struct ieee80211_if_sta *ifsta) |
978 | { | |
f698d856 | 979 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
980 | struct sta_info *sta; |
981 | int disassoc; | |
982 | ||
983 | /* TODO: start monitoring current AP signal quality and number of | |
984 | * missed beacons. Scan other channels every now and then and search | |
985 | * for better APs. */ | |
986 | /* TODO: remove expired BSSes */ | |
987 | ||
48c2fc59 | 988 | ifsta->state = IEEE80211_STA_MLME_ASSOCIATED; |
f0706e82 | 989 | |
d0709a65 JB |
990 | rcu_read_lock(); |
991 | ||
f0706e82 JB |
992 | sta = sta_info_get(local, ifsta->bssid); |
993 | if (!sta) { | |
0c68ae26 JB |
994 | printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n", |
995 | sdata->dev->name, ifsta->bssid); | |
f0706e82 JB |
996 | disassoc = 1; |
997 | } else { | |
998 | disassoc = 0; | |
999 | if (time_after(jiffies, | |
1000 | sta->last_rx + IEEE80211_MONITORING_INTERVAL)) { | |
d6f2da5b | 1001 | if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) { |
f0706e82 | 1002 | printk(KERN_DEBUG "%s: No ProbeResp from " |
0c68ae26 | 1003 | "current AP %pM - assume out of " |
f0706e82 | 1004 | "range\n", |
0c68ae26 | 1005 | sdata->dev->name, ifsta->bssid); |
f0706e82 | 1006 | disassoc = 1; |
d6f2da5b | 1007 | } else |
f698d856 | 1008 | ieee80211_send_probe_req(sdata, ifsta->bssid, |
4dfe51e1 JB |
1009 | ifsta->ssid, |
1010 | ifsta->ssid_len); | |
d6f2da5b | 1011 | ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL; |
f0706e82 | 1012 | } else { |
d6f2da5b | 1013 | ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL; |
f0706e82 JB |
1014 | if (time_after(jiffies, ifsta->last_probe + |
1015 | IEEE80211_PROBE_INTERVAL)) { | |
1016 | ifsta->last_probe = jiffies; | |
f698d856 | 1017 | ieee80211_send_probe_req(sdata, ifsta->bssid, |
f0706e82 JB |
1018 | ifsta->ssid, |
1019 | ifsta->ssid_len); | |
1020 | } | |
1021 | } | |
f0706e82 | 1022 | } |
d0709a65 JB |
1023 | |
1024 | rcu_read_unlock(); | |
1025 | ||
60f8b39c JB |
1026 | if (disassoc) |
1027 | ieee80211_set_disassoc(sdata, ifsta, true, true, | |
1028 | WLAN_REASON_PREV_AUTH_NOT_VALID); | |
1029 | else | |
1030 | mod_timer(&ifsta->timer, jiffies + | |
1031 | IEEE80211_MONITORING_INTERVAL); | |
f0706e82 JB |
1032 | } |
1033 | ||
1034 | ||
f698d856 | 1035 | static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1036 | struct ieee80211_if_sta *ifsta) |
1037 | { | |
f698d856 | 1038 | printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name); |
d6f2da5b | 1039 | ifsta->flags |= IEEE80211_STA_AUTHENTICATED; |
f698d856 | 1040 | ieee80211_associate(sdata, ifsta); |
f0706e82 JB |
1041 | } |
1042 | ||
1043 | ||
f698d856 | 1044 | static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1045 | struct ieee80211_if_sta *ifsta, |
1046 | struct ieee80211_mgmt *mgmt, | |
1047 | size_t len) | |
1048 | { | |
1049 | u8 *pos; | |
1050 | struct ieee802_11_elems elems; | |
1051 | ||
f0706e82 | 1052 | pos = mgmt->u.auth.variable; |
67a4cce4 | 1053 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
f4ea83dd | 1054 | if (!elems.challenge) |
f0706e82 | 1055 | return; |
f698d856 | 1056 | ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2, |
f0706e82 JB |
1057 | elems.challenge_len + 2, 1); |
1058 | } | |
1059 | ||
f698d856 | 1060 | static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1061 | struct ieee80211_if_sta *ifsta, |
1062 | struct ieee80211_mgmt *mgmt, | |
1063 | size_t len) | |
1064 | { | |
f0706e82 JB |
1065 | u16 auth_alg, auth_transaction, status_code; |
1066 | ||
48c2fc59 | 1067 | if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE && |
05c914fe | 1068 | sdata->vif.type != NL80211_IFTYPE_ADHOC) |
f0706e82 | 1069 | return; |
f0706e82 | 1070 | |
f4ea83dd | 1071 | if (len < 24 + 6) |
f0706e82 | 1072 | return; |
f0706e82 | 1073 | |
05c914fe | 1074 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC && |
f4ea83dd | 1075 | memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1076 | return; |
f0706e82 | 1077 | |
05c914fe | 1078 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC && |
f4ea83dd | 1079 | memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) |
f0706e82 | 1080 | return; |
f0706e82 JB |
1081 | |
1082 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
1083 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
1084 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
1085 | ||
05c914fe | 1086 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
135a2110 JB |
1087 | /* |
1088 | * IEEE 802.11 standard does not require authentication in IBSS | |
f0706e82 JB |
1089 | * networks and most implementations do not seem to use it. |
1090 | * However, try to reply to authentication attempts if someone | |
1091 | * has actually implemented this. | |
135a2110 | 1092 | */ |
f4ea83dd | 1093 | if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) |
f0706e82 | 1094 | return; |
f698d856 | 1095 | ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0); |
f0706e82 JB |
1096 | } |
1097 | ||
1098 | if (auth_alg != ifsta->auth_alg || | |
f4ea83dd | 1099 | auth_transaction != ifsta->auth_transaction) |
f0706e82 | 1100 | return; |
f0706e82 JB |
1101 | |
1102 | if (status_code != WLAN_STATUS_SUCCESS) { | |
f0706e82 JB |
1103 | if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) { |
1104 | u8 algs[3]; | |
1105 | const int num_algs = ARRAY_SIZE(algs); | |
1106 | int i, pos; | |
1107 | algs[0] = algs[1] = algs[2] = 0xff; | |
1108 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
1109 | algs[0] = WLAN_AUTH_OPEN; | |
1110 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
1111 | algs[1] = WLAN_AUTH_SHARED_KEY; | |
1112 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
1113 | algs[2] = WLAN_AUTH_LEAP; | |
1114 | if (ifsta->auth_alg == WLAN_AUTH_OPEN) | |
1115 | pos = 0; | |
1116 | else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY) | |
1117 | pos = 1; | |
1118 | else | |
1119 | pos = 2; | |
1120 | for (i = 0; i < num_algs; i++) { | |
1121 | pos++; | |
1122 | if (pos >= num_algs) | |
1123 | pos = 0; | |
1124 | if (algs[pos] == ifsta->auth_alg || | |
1125 | algs[pos] == 0xff) | |
1126 | continue; | |
1127 | if (algs[pos] == WLAN_AUTH_SHARED_KEY && | |
f698d856 | 1128 | !ieee80211_sta_wep_configured(sdata)) |
f0706e82 JB |
1129 | continue; |
1130 | ifsta->auth_alg = algs[pos]; | |
f0706e82 JB |
1131 | break; |
1132 | } | |
1133 | } | |
1134 | return; | |
1135 | } | |
1136 | ||
1137 | switch (ifsta->auth_alg) { | |
1138 | case WLAN_AUTH_OPEN: | |
1139 | case WLAN_AUTH_LEAP: | |
f698d856 | 1140 | ieee80211_auth_completed(sdata, ifsta); |
f0706e82 JB |
1141 | break; |
1142 | case WLAN_AUTH_SHARED_KEY: | |
1143 | if (ifsta->auth_transaction == 4) | |
f698d856 | 1144 | ieee80211_auth_completed(sdata, ifsta); |
f0706e82 | 1145 | else |
f698d856 | 1146 | ieee80211_auth_challenge(sdata, ifsta, mgmt, len); |
f0706e82 JB |
1147 | break; |
1148 | } | |
1149 | } | |
1150 | ||
1151 | ||
f698d856 | 1152 | static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1153 | struct ieee80211_if_sta *ifsta, |
1154 | struct ieee80211_mgmt *mgmt, | |
1155 | size_t len) | |
1156 | { | |
1157 | u16 reason_code; | |
1158 | ||
f4ea83dd | 1159 | if (len < 24 + 2) |
f0706e82 | 1160 | return; |
f0706e82 | 1161 | |
f4ea83dd | 1162 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1163 | return; |
f0706e82 JB |
1164 | |
1165 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
1166 | ||
988c0f72 | 1167 | if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) |
97c8b013 ZY |
1168 | printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n", |
1169 | sdata->dev->name, reason_code); | |
f0706e82 | 1170 | |
48c2fc59 TW |
1171 | if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE || |
1172 | ifsta->state == IEEE80211_STA_MLME_ASSOCIATE || | |
1173 | ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) { | |
9859b81e | 1174 | ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
f0706e82 JB |
1175 | mod_timer(&ifsta->timer, jiffies + |
1176 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1177 | } | |
1178 | ||
aa458d17 | 1179 | ieee80211_set_disassoc(sdata, ifsta, true, false, 0); |
d6f2da5b | 1180 | ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED; |
f0706e82 JB |
1181 | } |
1182 | ||
1183 | ||
f698d856 | 1184 | static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1185 | struct ieee80211_if_sta *ifsta, |
1186 | struct ieee80211_mgmt *mgmt, | |
1187 | size_t len) | |
1188 | { | |
1189 | u16 reason_code; | |
1190 | ||
f4ea83dd | 1191 | if (len < 24 + 2) |
f0706e82 | 1192 | return; |
f0706e82 | 1193 | |
f4ea83dd | 1194 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1195 | return; |
f0706e82 JB |
1196 | |
1197 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
1198 | ||
d6f2da5b | 1199 | if (ifsta->flags & IEEE80211_STA_ASSOCIATED) |
97c8b013 ZY |
1200 | printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n", |
1201 | sdata->dev->name, reason_code); | |
f0706e82 | 1202 | |
48c2fc59 TW |
1203 | if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) { |
1204 | ifsta->state = IEEE80211_STA_MLME_ASSOCIATE; | |
f0706e82 JB |
1205 | mod_timer(&ifsta->timer, jiffies + |
1206 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1207 | } | |
1208 | ||
5925d976 | 1209 | ieee80211_set_disassoc(sdata, ifsta, false, false, reason_code); |
f0706e82 JB |
1210 | } |
1211 | ||
1212 | ||
471b3efd | 1213 | static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1214 | struct ieee80211_if_sta *ifsta, |
1215 | struct ieee80211_mgmt *mgmt, | |
1216 | size_t len, | |
1217 | int reassoc) | |
1218 | { | |
471b3efd | 1219 | struct ieee80211_local *local = sdata->local; |
8318d78a | 1220 | struct ieee80211_supported_band *sband; |
f0706e82 | 1221 | struct sta_info *sta; |
8318d78a | 1222 | u64 rates, basic_rates; |
f0706e82 JB |
1223 | u16 capab_info, status_code, aid; |
1224 | struct ieee802_11_elems elems; | |
bda3933a | 1225 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
f0706e82 | 1226 | u8 *pos; |
ae5eb026 | 1227 | u32 changed = 0; |
f0706e82 | 1228 | int i, j; |
ddf4ac53 | 1229 | bool have_higher_than_11mbit = false, newsta = false; |
ae5eb026 | 1230 | u16 ap_ht_cap_flags; |
f0706e82 JB |
1231 | |
1232 | /* AssocResp and ReassocResp have identical structure, so process both | |
1233 | * of them in this function. */ | |
1234 | ||
48c2fc59 | 1235 | if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE) |
f0706e82 | 1236 | return; |
f0706e82 | 1237 | |
f4ea83dd | 1238 | if (len < 24 + 6) |
f0706e82 | 1239 | return; |
f0706e82 | 1240 | |
f4ea83dd | 1241 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1242 | return; |
f0706e82 JB |
1243 | |
1244 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
1245 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
1246 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
f0706e82 | 1247 | |
0c68ae26 | 1248 | printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x " |
f0706e82 | 1249 | "status=%d aid=%d)\n", |
0c68ae26 | 1250 | sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa, |
ddd68587 | 1251 | capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); |
f0706e82 JB |
1252 | |
1253 | if (status_code != WLAN_STATUS_SUCCESS) { | |
1254 | printk(KERN_DEBUG "%s: AP denied association (code=%d)\n", | |
f698d856 | 1255 | sdata->dev->name, status_code); |
8a69aa93 DD |
1256 | /* if this was a reassociation, ensure we try a "full" |
1257 | * association next time. This works around some broken APs | |
1258 | * which do not correctly reject reassociation requests. */ | |
d6f2da5b | 1259 | ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
f0706e82 JB |
1260 | return; |
1261 | } | |
1262 | ||
1dd84aa2 JB |
1263 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
1264 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " | |
f698d856 | 1265 | "set\n", sdata->dev->name, aid); |
1dd84aa2 JB |
1266 | aid &= ~(BIT(15) | BIT(14)); |
1267 | ||
f0706e82 | 1268 | pos = mgmt->u.assoc_resp.variable; |
67a4cce4 | 1269 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
f0706e82 JB |
1270 | |
1271 | if (!elems.supp_rates) { | |
1272 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", | |
f698d856 | 1273 | sdata->dev->name); |
f0706e82 JB |
1274 | return; |
1275 | } | |
1276 | ||
f698d856 | 1277 | printk(KERN_DEBUG "%s: associated\n", sdata->dev->name); |
f0706e82 JB |
1278 | ifsta->aid = aid; |
1279 | ifsta->ap_capab = capab_info; | |
1280 | ||
1281 | kfree(ifsta->assocresp_ies); | |
1282 | ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt); | |
0ec0b7ac | 1283 | ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL); |
f0706e82 JB |
1284 | if (ifsta->assocresp_ies) |
1285 | memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len); | |
1286 | ||
d0709a65 JB |
1287 | rcu_read_lock(); |
1288 | ||
f0706e82 JB |
1289 | /* Add STA entry for the AP */ |
1290 | sta = sta_info_get(local, ifsta->bssid); | |
1291 | if (!sta) { | |
c2b13452 | 1292 | struct ieee80211_bss *bss; |
ddf4ac53 JB |
1293 | |
1294 | newsta = true; | |
d0709a65 | 1295 | |
73651ee6 JB |
1296 | sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC); |
1297 | if (!sta) { | |
1298 | printk(KERN_DEBUG "%s: failed to alloc STA entry for" | |
f698d856 | 1299 | " the AP\n", sdata->dev->name); |
d0709a65 | 1300 | rcu_read_unlock(); |
f0706e82 JB |
1301 | return; |
1302 | } | |
60f8b39c JB |
1303 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
1304 | local->hw.conf.channel->center_freq, | |
1305 | ifsta->ssid, ifsta->ssid_len); | |
1306 | if (bss) { | |
1307 | sta->last_signal = bss->signal; | |
1308 | sta->last_qual = bss->qual; | |
1309 | sta->last_noise = bss->noise; | |
1310 | ieee80211_rx_bss_put(local, bss); | |
1311 | } | |
f709fc69 | 1312 | |
60f8b39c JB |
1313 | /* update new sta with its last rx activity */ |
1314 | sta->last_rx = jiffies; | |
f709fc69 | 1315 | } |
f709fc69 | 1316 | |
60f8b39c JB |
1317 | /* |
1318 | * FIXME: Do we really need to update the sta_info's information here? | |
1319 | * We already know about the AP (we found it in our list) so it | |
1320 | * should already be filled with the right info, no? | |
1321 | * As is stands, all this is racy because typically we assume | |
1322 | * the information that is filled in here (except flags) doesn't | |
1323 | * change while a STA structure is alive. As such, it should move | |
1324 | * to between the sta_info_alloc() and sta_info_insert() above. | |
1325 | */ | |
f709fc69 | 1326 | |
60f8b39c JB |
1327 | set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP | |
1328 | WLAN_STA_AUTHORIZED); | |
05e5e883 | 1329 | |
60f8b39c JB |
1330 | rates = 0; |
1331 | basic_rates = 0; | |
1332 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
f709fc69 | 1333 | |
60f8b39c JB |
1334 | for (i = 0; i < elems.supp_rates_len; i++) { |
1335 | int rate = (elems.supp_rates[i] & 0x7f) * 5; | |
d61272cb | 1336 | bool is_basic = !!(elems.supp_rates[i] & 0x80); |
f709fc69 | 1337 | |
60f8b39c JB |
1338 | if (rate > 110) |
1339 | have_higher_than_11mbit = true; | |
1340 | ||
1341 | for (j = 0; j < sband->n_bitrates; j++) { | |
d61272cb | 1342 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1343 | rates |= BIT(j); |
d61272cb TW |
1344 | if (is_basic) |
1345 | basic_rates |= BIT(j); | |
1346 | break; | |
1347 | } | |
f709fc69 | 1348 | } |
f709fc69 LCC |
1349 | } |
1350 | ||
60f8b39c JB |
1351 | for (i = 0; i < elems.ext_supp_rates_len; i++) { |
1352 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; | |
d61272cb | 1353 | bool is_basic = !!(elems.supp_rates[i] & 0x80); |
f0706e82 | 1354 | |
60f8b39c JB |
1355 | if (rate > 110) |
1356 | have_higher_than_11mbit = true; | |
f0706e82 | 1357 | |
60f8b39c | 1358 | for (j = 0; j < sband->n_bitrates; j++) { |
d61272cb | 1359 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1360 | rates |= BIT(j); |
d61272cb TW |
1361 | if (is_basic) |
1362 | basic_rates |= BIT(j); | |
1363 | break; | |
1364 | } | |
60f8b39c | 1365 | } |
1ebebea8 | 1366 | } |
f0706e82 | 1367 | |
323ce79a | 1368 | sta->sta.supp_rates[local->hw.conf.channel->band] = rates; |
bda3933a | 1369 | sdata->vif.bss_conf.basic_rates = basic_rates; |
60f8b39c JB |
1370 | |
1371 | /* cf. IEEE 802.11 9.2.12 */ | |
1372 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
1373 | have_higher_than_11mbit) | |
1374 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
1375 | else | |
1376 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
f0706e82 | 1377 | |
ae5eb026 JB |
1378 | if (elems.ht_cap_elem) |
1379 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, | |
d9fe60de | 1380 | elems.ht_cap_elem, &sta->sta.ht_cap); |
ae5eb026 JB |
1381 | |
1382 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
f0706e82 | 1383 | |
4b7679a5 | 1384 | rate_control_rate_init(sta); |
f0706e82 | 1385 | |
ddf4ac53 | 1386 | if (elems.wmm_param) |
60f8b39c | 1387 | set_sta_flags(sta, WLAN_STA_WME); |
ddf4ac53 JB |
1388 | |
1389 | if (newsta) { | |
1390 | int err = sta_info_insert(sta); | |
1391 | if (err) { | |
1392 | printk(KERN_DEBUG "%s: failed to insert STA entry for" | |
1393 | " the AP (error %d)\n", sdata->dev->name, err); | |
1394 | rcu_read_unlock(); | |
1395 | return; | |
1396 | } | |
1397 | } | |
1398 | ||
1399 | rcu_read_unlock(); | |
1400 | ||
1401 | if (elems.wmm_param) | |
60f8b39c JB |
1402 | ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param, |
1403 | elems.wmm_param_len); | |
f0706e82 | 1404 | |
ae5eb026 JB |
1405 | if (elems.ht_info_elem && elems.wmm_param && |
1406 | (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) | |
1407 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, | |
1408 | ap_ht_cap_flags); | |
1409 | ||
60f8b39c JB |
1410 | /* set AID and assoc capability, |
1411 | * ieee80211_set_associated() will tell the driver */ | |
1412 | bss_conf->aid = aid; | |
1413 | bss_conf->assoc_capability = capab_info; | |
ae5eb026 | 1414 | ieee80211_set_associated(sdata, ifsta, changed); |
f0706e82 | 1415 | |
60f8b39c | 1416 | ieee80211_associated(sdata, ifsta); |
f0706e82 JB |
1417 | } |
1418 | ||
1419 | ||
f698d856 | 1420 | static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, |
a607268a | 1421 | struct ieee80211_if_sta *ifsta, |
c2b13452 | 1422 | struct ieee80211_bss *bss) |
a607268a | 1423 | { |
f698d856 | 1424 | struct ieee80211_local *local = sdata->local; |
a607268a BR |
1425 | int res, rates, i, j; |
1426 | struct sk_buff *skb; | |
1427 | struct ieee80211_mgmt *mgmt; | |
a607268a | 1428 | u8 *pos; |
a607268a | 1429 | struct ieee80211_supported_band *sband; |
507b06d0 | 1430 | union iwreq_data wrqu; |
a607268a | 1431 | |
e2ef12d3 RR |
1432 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400); |
1433 | if (!skb) { | |
1434 | printk(KERN_DEBUG "%s: failed to allocate buffer for probe " | |
1435 | "response\n", sdata->dev->name); | |
1436 | return -ENOMEM; | |
1437 | } | |
1438 | ||
a607268a BR |
1439 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
1440 | ||
1441 | /* Remove possible STA entries from other IBSS networks. */ | |
dc6676b7 | 1442 | sta_info_flush_delayed(sdata); |
a607268a BR |
1443 | |
1444 | if (local->ops->reset_tsf) { | |
1445 | /* Reset own TSF to allow time synchronization work. */ | |
1446 | local->ops->reset_tsf(local_to_hw(local)); | |
1447 | } | |
1448 | memcpy(ifsta->bssid, bss->bssid, ETH_ALEN); | |
9d139c81 | 1449 | res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID); |
a607268a BR |
1450 | if (res) |
1451 | return res; | |
1452 | ||
1453 | local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10; | |
1454 | ||
a607268a BR |
1455 | sdata->drop_unencrypted = bss->capability & |
1456 | WLAN_CAPABILITY_PRIVACY ? 1 : 0; | |
1457 | ||
f698d856 | 1458 | res = ieee80211_set_freq(sdata, bss->freq); |
a607268a | 1459 | |
be038b37 AK |
1460 | if (res) |
1461 | return res; | |
a607268a | 1462 | |
9d139c81 | 1463 | /* Build IBSS probe response */ |
a607268a | 1464 | |
e2ef12d3 | 1465 | skb_reserve(skb, local->hw.extra_tx_headroom); |
a607268a | 1466 | |
e2ef12d3 RR |
1467 | mgmt = (struct ieee80211_mgmt *) |
1468 | skb_put(skb, 24 + sizeof(mgmt->u.beacon)); | |
1469 | memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon)); | |
1470 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
1471 | IEEE80211_STYPE_PROBE_RESP); | |
1472 | memset(mgmt->da, 0xff, ETH_ALEN); | |
1473 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); | |
1474 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
1475 | mgmt->u.beacon.beacon_int = | |
1476 | cpu_to_le16(local->hw.conf.beacon_int); | |
1477 | mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp); | |
1478 | mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability); | |
a607268a | 1479 | |
e2ef12d3 RR |
1480 | pos = skb_put(skb, 2 + ifsta->ssid_len); |
1481 | *pos++ = WLAN_EID_SSID; | |
1482 | *pos++ = ifsta->ssid_len; | |
1483 | memcpy(pos, ifsta->ssid, ifsta->ssid_len); | |
a607268a | 1484 | |
e2ef12d3 RR |
1485 | rates = bss->supp_rates_len; |
1486 | if (rates > 8) | |
1487 | rates = 8; | |
1488 | pos = skb_put(skb, 2 + rates); | |
1489 | *pos++ = WLAN_EID_SUPP_RATES; | |
1490 | *pos++ = rates; | |
1491 | memcpy(pos, bss->supp_rates, rates); | |
1492 | ||
1493 | if (bss->band == IEEE80211_BAND_2GHZ) { | |
1494 | pos = skb_put(skb, 2 + 1); | |
1495 | *pos++ = WLAN_EID_DS_PARAMS; | |
1496 | *pos++ = 1; | |
1497 | *pos++ = ieee80211_frequency_to_channel(bss->freq); | |
1498 | } | |
a607268a | 1499 | |
e2ef12d3 RR |
1500 | pos = skb_put(skb, 2 + 2); |
1501 | *pos++ = WLAN_EID_IBSS_PARAMS; | |
1502 | *pos++ = 2; | |
1503 | /* FIX: set ATIM window based on scan results */ | |
1504 | *pos++ = 0; | |
1505 | *pos++ = 0; | |
e039fa4a | 1506 | |
e2ef12d3 RR |
1507 | if (bss->supp_rates_len > 8) { |
1508 | rates = bss->supp_rates_len - 8; | |
1509 | pos = skb_put(skb, 2 + rates); | |
1510 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
1511 | *pos++ = rates; | |
1512 | memcpy(pos, &bss->supp_rates[8], rates); | |
9d139c81 | 1513 | } |
a607268a | 1514 | |
e2ef12d3 RR |
1515 | ifsta->probe_resp = skb; |
1516 | ||
1517 | ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON); | |
1518 | ||
1519 | ||
9d139c81 JB |
1520 | rates = 0; |
1521 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1522 | for (i = 0; i < bss->supp_rates_len; i++) { | |
1523 | int bitrate = (bss->supp_rates[i] & 0x7f) * 5; | |
1524 | for (j = 0; j < sband->n_bitrates; j++) | |
1525 | if (sband->bitrates[j].bitrate == bitrate) | |
1526 | rates |= BIT(j); | |
a607268a | 1527 | } |
9d139c81 JB |
1528 | ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates; |
1529 | ||
b079ada7 | 1530 | ieee80211_sta_def_wmm_params(sdata, bss); |
a607268a | 1531 | |
48c2fc59 | 1532 | ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED; |
a607268a BR |
1533 | mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); |
1534 | ||
4492bea6 EG |
1535 | ieee80211_led_assoc(local, true); |
1536 | ||
507b06d0 DW |
1537 | memset(&wrqu, 0, sizeof(wrqu)); |
1538 | memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN); | |
f698d856 | 1539 | wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL); |
a607268a BR |
1540 | |
1541 | return res; | |
1542 | } | |
1543 | ||
98c8fccf JB |
1544 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
1545 | struct ieee80211_mgmt *mgmt, | |
1546 | size_t len, | |
1547 | struct ieee80211_rx_status *rx_status, | |
1548 | struct ieee802_11_elems *elems, | |
1549 | bool beacon) | |
1550 | { | |
1551 | struct ieee80211_local *local = sdata->local; | |
1552 | int freq; | |
c2b13452 | 1553 | struct ieee80211_bss *bss; |
98c8fccf JB |
1554 | struct sta_info *sta; |
1555 | struct ieee80211_channel *channel; | |
1556 | u64 beacon_timestamp, rx_timestamp; | |
1557 | u64 supp_rates = 0; | |
1558 | enum ieee80211_band band = rx_status->band; | |
98c8fccf JB |
1559 | |
1560 | if (elems->ds_params && elems->ds_params_len == 1) | |
1561 | freq = ieee80211_channel_to_frequency(elems->ds_params[0]); | |
1562 | else | |
1563 | freq = rx_status->freq; | |
1564 | ||
1565 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
1566 | ||
1567 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
1568 | return; | |
1569 | ||
05c914fe | 1570 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && elems->supp_rates && |
98c8fccf JB |
1571 | memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) { |
1572 | supp_rates = ieee80211_sta_get_rates(local, elems, band); | |
1573 | ||
1574 | rcu_read_lock(); | |
1575 | ||
1576 | sta = sta_info_get(local, mgmt->sa); | |
1577 | if (sta) { | |
1578 | u64 prev_rates; | |
1579 | ||
323ce79a | 1580 | prev_rates = sta->sta.supp_rates[band]; |
98c8fccf | 1581 | /* make sure mandatory rates are always added */ |
323ce79a | 1582 | sta->sta.supp_rates[band] = supp_rates | |
96dd22ac | 1583 | ieee80211_mandatory_rates(local, band); |
98c8fccf JB |
1584 | |
1585 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
323ce79a | 1586 | if (sta->sta.supp_rates[band] != prev_rates) |
98c8fccf | 1587 | printk(KERN_DEBUG "%s: updated supp_rates set " |
0c68ae26 | 1588 | "for %pM based on beacon info (0x%llx | " |
98c8fccf | 1589 | "0x%llx -> 0x%llx)\n", |
17741cdc | 1590 | sdata->dev->name, |
0c68ae26 | 1591 | sta->sta.addr, |
98c8fccf JB |
1592 | (unsigned long long) prev_rates, |
1593 | (unsigned long long) supp_rates, | |
323ce79a | 1594 | (unsigned long long) sta->sta.supp_rates[band]); |
98c8fccf JB |
1595 | #endif |
1596 | } else { | |
ab1f5c0b | 1597 | ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates); |
98c8fccf JB |
1598 | } |
1599 | ||
1600 | rcu_read_unlock(); | |
1601 | } | |
1602 | ||
1603 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, | |
1604 | freq, beacon); | |
1605 | if (!bss) | |
1606 | return; | |
1607 | ||
1608 | /* was just updated in ieee80211_bss_info_update */ | |
1609 | beacon_timestamp = bss->timestamp; | |
1610 | ||
30b89b0f JB |
1611 | /* |
1612 | * In STA mode, the remaining parameters should not be overridden | |
1613 | * by beacons because they're not necessarily accurate there. | |
1614 | */ | |
05c914fe | 1615 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC && |
9859b81e | 1616 | bss->last_probe_resp && beacon) { |
3e122be0 | 1617 | ieee80211_rx_bss_put(local, bss); |
30b89b0f JB |
1618 | return; |
1619 | } | |
1620 | ||
9d9bf77d | 1621 | /* check if we need to merge IBSS */ |
05c914fe | 1622 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && beacon && |
fba4a1e6 | 1623 | bss->capability & WLAN_CAPABILITY_IBSS && |
9d9bf77d | 1624 | bss->freq == local->oper_channel->center_freq && |
ae6a44e3 EK |
1625 | elems->ssid_len == sdata->u.sta.ssid_len && |
1626 | memcmp(elems->ssid, sdata->u.sta.ssid, | |
1627 | sdata->u.sta.ssid_len) == 0) { | |
9d9bf77d BR |
1628 | if (rx_status->flag & RX_FLAG_TSFT) { |
1629 | /* in order for correct IBSS merging we need mactime | |
1630 | * | |
1631 | * since mactime is defined as the time the first data | |
1632 | * symbol of the frame hits the PHY, and the timestamp | |
1633 | * of the beacon is defined as "the time that the data | |
1634 | * symbol containing the first bit of the timestamp is | |
1635 | * transmitted to the PHY plus the transmitting STA’s | |
1636 | * delays through its local PHY from the MAC-PHY | |
1637 | * interface to its interface with the WM" | |
1638 | * (802.11 11.1.2) - equals the time this bit arrives at | |
1639 | * the receiver - we have to take into account the | |
1640 | * offset between the two. | |
1641 | * e.g: at 1 MBit that means mactime is 192 usec earlier | |
1642 | * (=24 bytes * 8 usecs/byte) than the beacon timestamp. | |
1643 | */ | |
0fb8ca45 JM |
1644 | int rate; |
1645 | if (rx_status->flag & RX_FLAG_HT) { | |
1646 | rate = 65; /* TODO: HT rates */ | |
1647 | } else { | |
1648 | rate = local->hw.wiphy->bands[band]-> | |
9d9bf77d | 1649 | bitrates[rx_status->rate_idx].bitrate; |
0fb8ca45 | 1650 | } |
9d9bf77d BR |
1651 | rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate); |
1652 | } else if (local && local->ops && local->ops->get_tsf) | |
1653 | /* second best option: get current TSF */ | |
1654 | rx_timestamp = local->ops->get_tsf(local_to_hw(local)); | |
1655 | else | |
1656 | /* can't merge without knowing the TSF */ | |
1657 | rx_timestamp = -1LLU; | |
1658 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0c68ae26 JB |
1659 | printk(KERN_DEBUG "RX beacon SA=%pM BSSID=" |
1660 | "%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n", | |
1661 | mgmt->sa, mgmt->bssid, | |
9d9bf77d BR |
1662 | (unsigned long long)rx_timestamp, |
1663 | (unsigned long long)beacon_timestamp, | |
1664 | (unsigned long long)(rx_timestamp - beacon_timestamp), | |
1665 | jiffies); | |
1666 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
1667 | if (beacon_timestamp > rx_timestamp) { | |
576fdeae | 1668 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
f4ea83dd | 1669 | printk(KERN_DEBUG "%s: beacon TSF higher than " |
0c68ae26 JB |
1670 | "local TSF - IBSS merge with BSSID %pM\n", |
1671 | sdata->dev->name, mgmt->bssid); | |
fba4a1e6 | 1672 | #endif |
f698d856 | 1673 | ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss); |
ab1f5c0b | 1674 | ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates); |
9d9bf77d BR |
1675 | } |
1676 | } | |
1677 | ||
3e122be0 | 1678 | ieee80211_rx_bss_put(local, bss); |
f0706e82 JB |
1679 | } |
1680 | ||
1681 | ||
f698d856 | 1682 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1683 | struct ieee80211_mgmt *mgmt, |
1684 | size_t len, | |
1685 | struct ieee80211_rx_status *rx_status) | |
1686 | { | |
ae6a44e3 EK |
1687 | size_t baselen; |
1688 | struct ieee802_11_elems elems; | |
9859b81e | 1689 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
ae6a44e3 | 1690 | |
8e7cdbb6 TW |
1691 | if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN)) |
1692 | return; /* ignore ProbeResp to foreign address */ | |
1693 | ||
ae6a44e3 EK |
1694 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
1695 | if (baselen > len) | |
1696 | return; | |
1697 | ||
1698 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
1699 | &elems); | |
1700 | ||
98c8fccf | 1701 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false); |
9859b81e RR |
1702 | |
1703 | /* direct probe may be part of the association flow */ | |
1704 | if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE, | |
1705 | &ifsta->request)) { | |
1706 | printk(KERN_DEBUG "%s direct probe responded\n", | |
1707 | sdata->dev->name); | |
1708 | ieee80211_authenticate(sdata, ifsta); | |
1709 | } | |
f0706e82 JB |
1710 | } |
1711 | ||
1712 | ||
f698d856 | 1713 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1714 | struct ieee80211_mgmt *mgmt, |
1715 | size_t len, | |
1716 | struct ieee80211_rx_status *rx_status) | |
1717 | { | |
f0706e82 | 1718 | struct ieee80211_if_sta *ifsta; |
f0706e82 JB |
1719 | size_t baselen; |
1720 | struct ieee802_11_elems elems; | |
f698d856 | 1721 | struct ieee80211_local *local = sdata->local; |
471b3efd | 1722 | u32 changed = 0; |
7a5158ef JB |
1723 | bool erp_valid; |
1724 | u8 erp_value = 0; | |
f0706e82 | 1725 | |
ae6a44e3 EK |
1726 | /* Process beacon from the current BSS */ |
1727 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
1728 | if (baselen > len) | |
1729 | return; | |
1730 | ||
1731 | ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems); | |
1732 | ||
98c8fccf | 1733 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true); |
f0706e82 | 1734 | |
05c914fe | 1735 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
f0706e82 JB |
1736 | return; |
1737 | ifsta = &sdata->u.sta; | |
1738 | ||
d6f2da5b | 1739 | if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) || |
f0706e82 JB |
1740 | memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) |
1741 | return; | |
1742 | ||
fe3fa827 JB |
1743 | ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param, |
1744 | elems.wmm_param_len); | |
1745 | ||
7a5158ef JB |
1746 | |
1747 | if (elems.erp_info && elems.erp_info_len >= 1) { | |
1748 | erp_valid = true; | |
1749 | erp_value = elems.erp_info[0]; | |
1750 | } else { | |
1751 | erp_valid = false; | |
50c4afb9 | 1752 | } |
7a5158ef JB |
1753 | changed |= ieee80211_handle_bss_capability(sdata, |
1754 | le16_to_cpu(mgmt->u.beacon.capab_info), | |
1755 | erp_valid, erp_value); | |
f0706e82 | 1756 | |
d3c990fb | 1757 | |
ae5eb026 JB |
1758 | if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param) { |
1759 | struct sta_info *sta; | |
1760 | struct ieee80211_supported_band *sband; | |
1761 | u16 ap_ht_cap_flags; | |
1762 | ||
1763 | rcu_read_lock(); | |
1764 | ||
1765 | sta = sta_info_get(local, ifsta->bssid); | |
1766 | if (!sta) { | |
1767 | rcu_read_unlock(); | |
1768 | return; | |
1769 | } | |
1770 | ||
1771 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1772 | ||
1773 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, | |
1774 | elems.ht_cap_elem, &sta->sta.ht_cap); | |
1775 | ||
1776 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
1777 | ||
1778 | rcu_read_unlock(); | |
1779 | ||
1780 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, | |
1781 | ap_ht_cap_flags); | |
d3c990fb RR |
1782 | } |
1783 | ||
3f2355cb LR |
1784 | if (elems.country_elem) { |
1785 | /* Note we are only reviewing this on beacons | |
1786 | * for the BSSID we are associated to */ | |
1787 | regulatory_hint_11d(local->hw.wiphy, | |
1788 | elems.country_elem, elems.country_elem_len); | |
1789 | } | |
1790 | ||
471b3efd | 1791 | ieee80211_bss_info_change_notify(sdata, changed); |
f0706e82 JB |
1792 | } |
1793 | ||
1794 | ||
f698d856 | 1795 | static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1796 | struct ieee80211_if_sta *ifsta, |
1797 | struct ieee80211_mgmt *mgmt, | |
1798 | size_t len, | |
1799 | struct ieee80211_rx_status *rx_status) | |
1800 | { | |
f698d856 | 1801 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1802 | int tx_last_beacon; |
1803 | struct sk_buff *skb; | |
1804 | struct ieee80211_mgmt *resp; | |
1805 | u8 *pos, *end; | |
1806 | ||
05c914fe | 1807 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC || |
48c2fc59 | 1808 | ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED || |
f0706e82 JB |
1809 | len < 24 + 2 || !ifsta->probe_resp) |
1810 | return; | |
1811 | ||
1812 | if (local->ops->tx_last_beacon) | |
1813 | tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local)); | |
1814 | else | |
1815 | tx_last_beacon = 1; | |
1816 | ||
1817 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0c68ae26 JB |
1818 | printk(KERN_DEBUG "%s: RX ProbeReq SA=%pM DA=%pM BSSID=%pM" |
1819 | " (tx_last_beacon=%d)\n", | |
1820 | sdata->dev->name, mgmt->sa, mgmt->da, | |
1821 | mgmt->bssid, tx_last_beacon); | |
f0706e82 JB |
1822 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
1823 | ||
1824 | if (!tx_last_beacon) | |
1825 | return; | |
1826 | ||
1827 | if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 && | |
1828 | memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0) | |
1829 | return; | |
1830 | ||
1831 | end = ((u8 *) mgmt) + len; | |
1832 | pos = mgmt->u.probe_req.variable; | |
1833 | if (pos[0] != WLAN_EID_SSID || | |
1834 | pos + 2 + pos[1] > end) { | |
f4ea83dd JB |
1835 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
1836 | printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq " | |
0c68ae26 JB |
1837 | "from %pM\n", |
1838 | sdata->dev->name, mgmt->sa); | |
f4ea83dd | 1839 | #endif |
f0706e82 JB |
1840 | return; |
1841 | } | |
1842 | if (pos[1] != 0 && | |
1843 | (pos[1] != ifsta->ssid_len || | |
1844 | memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) { | |
1845 | /* Ignore ProbeReq for foreign SSID */ | |
1846 | return; | |
1847 | } | |
1848 | ||
1849 | /* Reply with ProbeResp */ | |
0ec0b7ac | 1850 | skb = skb_copy(ifsta->probe_resp, GFP_KERNEL); |
f0706e82 JB |
1851 | if (!skb) |
1852 | return; | |
1853 | ||
1854 | resp = (struct ieee80211_mgmt *) skb->data; | |
1855 | memcpy(resp->da, mgmt->sa, ETH_ALEN); | |
1856 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0c68ae26 JB |
1857 | printk(KERN_DEBUG "%s: Sending ProbeResp to %pM\n", |
1858 | sdata->dev->name, resp->da); | |
f0706e82 | 1859 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
e50db65c | 1860 | ieee80211_tx_skb(sdata, skb, 0); |
f0706e82 JB |
1861 | } |
1862 | ||
f698d856 | 1863 | void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, |
f0706e82 JB |
1864 | struct ieee80211_rx_status *rx_status) |
1865 | { | |
f698d856 | 1866 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1867 | struct ieee80211_if_sta *ifsta; |
1868 | struct ieee80211_mgmt *mgmt; | |
1869 | u16 fc; | |
1870 | ||
1871 | if (skb->len < 24) | |
1872 | goto fail; | |
1873 | ||
f0706e82 JB |
1874 | ifsta = &sdata->u.sta; |
1875 | ||
1876 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1877 | fc = le16_to_cpu(mgmt->frame_control); | |
1878 | ||
1879 | switch (fc & IEEE80211_FCTL_STYPE) { | |
1880 | case IEEE80211_STYPE_PROBE_REQ: | |
1881 | case IEEE80211_STYPE_PROBE_RESP: | |
1882 | case IEEE80211_STYPE_BEACON: | |
1883 | memcpy(skb->cb, rx_status, sizeof(*rx_status)); | |
1884 | case IEEE80211_STYPE_AUTH: | |
1885 | case IEEE80211_STYPE_ASSOC_RESP: | |
1886 | case IEEE80211_STYPE_REASSOC_RESP: | |
1887 | case IEEE80211_STYPE_DEAUTH: | |
1888 | case IEEE80211_STYPE_DISASSOC: | |
1889 | skb_queue_tail(&ifsta->skb_queue, skb); | |
1890 | queue_work(local->hw.workqueue, &ifsta->work); | |
1891 | return; | |
f0706e82 JB |
1892 | } |
1893 | ||
1894 | fail: | |
1895 | kfree_skb(skb); | |
1896 | } | |
1897 | ||
f698d856 | 1898 | static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1899 | struct sk_buff *skb) |
1900 | { | |
1901 | struct ieee80211_rx_status *rx_status; | |
f0706e82 JB |
1902 | struct ieee80211_if_sta *ifsta; |
1903 | struct ieee80211_mgmt *mgmt; | |
1904 | u16 fc; | |
1905 | ||
f0706e82 JB |
1906 | ifsta = &sdata->u.sta; |
1907 | ||
1908 | rx_status = (struct ieee80211_rx_status *) skb->cb; | |
1909 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1910 | fc = le16_to_cpu(mgmt->frame_control); | |
1911 | ||
1912 | switch (fc & IEEE80211_FCTL_STYPE) { | |
1913 | case IEEE80211_STYPE_PROBE_REQ: | |
f698d856 | 1914 | ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len, |
f0706e82 JB |
1915 | rx_status); |
1916 | break; | |
1917 | case IEEE80211_STYPE_PROBE_RESP: | |
f698d856 | 1918 | ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status); |
f0706e82 JB |
1919 | break; |
1920 | case IEEE80211_STYPE_BEACON: | |
f698d856 | 1921 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); |
f0706e82 JB |
1922 | break; |
1923 | case IEEE80211_STYPE_AUTH: | |
f698d856 | 1924 | ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len); |
f0706e82 JB |
1925 | break; |
1926 | case IEEE80211_STYPE_ASSOC_RESP: | |
471b3efd | 1927 | ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0); |
f0706e82 JB |
1928 | break; |
1929 | case IEEE80211_STYPE_REASSOC_RESP: | |
471b3efd | 1930 | ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1); |
f0706e82 JB |
1931 | break; |
1932 | case IEEE80211_STYPE_DEAUTH: | |
f698d856 | 1933 | ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len); |
f0706e82 JB |
1934 | break; |
1935 | case IEEE80211_STYPE_DISASSOC: | |
f698d856 | 1936 | ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len); |
f0706e82 JB |
1937 | break; |
1938 | } | |
1939 | ||
1940 | kfree_skb(skb); | |
1941 | } | |
1942 | ||
1943 | ||
f698d856 | 1944 | static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1945 | { |
f698d856 | 1946 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1947 | int active = 0; |
1948 | struct sta_info *sta; | |
1949 | ||
d0709a65 JB |
1950 | rcu_read_lock(); |
1951 | ||
1952 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
1953 | if (sta->sdata == sdata && | |
f0706e82 JB |
1954 | time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL, |
1955 | jiffies)) { | |
1956 | active++; | |
1957 | break; | |
1958 | } | |
1959 | } | |
d0709a65 JB |
1960 | |
1961 | rcu_read_unlock(); | |
f0706e82 JB |
1962 | |
1963 | return active; | |
1964 | } | |
1965 | ||
1966 | ||
f698d856 | 1967 | static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1968 | struct ieee80211_if_sta *ifsta) |
1969 | { | |
1970 | mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); | |
1971 | ||
f698d856 JBG |
1972 | ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT); |
1973 | if (ieee80211_sta_active_ibss(sdata)) | |
f0706e82 JB |
1974 | return; |
1975 | ||
1976 | printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other " | |
f698d856 | 1977 | "IBSS networks with same SSID (merge)\n", sdata->dev->name); |
c2b13452 | 1978 | ieee80211_request_scan(sdata, ifsta->ssid, ifsta->ssid_len); |
f0706e82 JB |
1979 | } |
1980 | ||
1981 | ||
9c6bd790 | 1982 | static void ieee80211_sta_timer(unsigned long data) |
f0706e82 | 1983 | { |
60f8b39c JB |
1984 | struct ieee80211_sub_if_data *sdata = |
1985 | (struct ieee80211_sub_if_data *) data; | |
1986 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
1987 | struct ieee80211_local *local = sdata->local; | |
f0706e82 | 1988 | |
60f8b39c JB |
1989 | set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); |
1990 | queue_work(local->hw.workqueue, &ifsta->work); | |
f0706e82 JB |
1991 | } |
1992 | ||
f698d856 | 1993 | static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1994 | struct ieee80211_if_sta *ifsta) |
1995 | { | |
f698d856 | 1996 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1997 | |
1998 | if (local->ops->reset_tsf) { | |
1999 | /* Reset own TSF to allow time synchronization work. */ | |
2000 | local->ops->reset_tsf(local_to_hw(local)); | |
2001 | } | |
2002 | ||
2003 | ifsta->wmm_last_param_set = -1; /* allow any WMM update */ | |
2004 | ||
2005 | ||
2006 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
2007 | ifsta->auth_alg = WLAN_AUTH_OPEN; | |
2008 | else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
2009 | ifsta->auth_alg = WLAN_AUTH_SHARED_KEY; | |
2010 | else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
2011 | ifsta->auth_alg = WLAN_AUTH_LEAP; | |
2012 | else | |
2013 | ifsta->auth_alg = WLAN_AUTH_OPEN; | |
f0706e82 | 2014 | ifsta->auth_transaction = -1; |
d6f2da5b | 2015 | ifsta->flags &= ~IEEE80211_STA_ASSOCIATED; |
6042a3e3 | 2016 | ifsta->assoc_scan_tries = 0; |
9859b81e | 2017 | ifsta->direct_probe_tries = 0; |
6042a3e3 RR |
2018 | ifsta->auth_tries = 0; |
2019 | ifsta->assoc_tries = 0; | |
24e64622 | 2020 | netif_tx_stop_all_queues(sdata->dev); |
f698d856 | 2021 | netif_carrier_off(sdata->dev); |
f0706e82 JB |
2022 | } |
2023 | ||
2024 | ||
f0706e82 JB |
2025 | static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta, |
2026 | const char *ssid, int ssid_len) | |
2027 | { | |
2028 | int tmp, hidden_ssid; | |
2029 | ||
48225709 MW |
2030 | if (ssid_len == ifsta->ssid_len && |
2031 | !memcmp(ifsta->ssid, ssid, ssid_len)) | |
f0706e82 JB |
2032 | return 1; |
2033 | ||
d6f2da5b | 2034 | if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) |
f0706e82 JB |
2035 | return 0; |
2036 | ||
2037 | hidden_ssid = 1; | |
2038 | tmp = ssid_len; | |
2039 | while (tmp--) { | |
2040 | if (ssid[tmp] != '\0') { | |
2041 | hidden_ssid = 0; | |
2042 | break; | |
2043 | } | |
2044 | } | |
2045 | ||
cb3da8cc | 2046 | if (hidden_ssid && (ifsta->ssid_len == ssid_len || ssid_len == 0)) |
f0706e82 JB |
2047 | return 1; |
2048 | ||
2049 | if (ssid_len == 1 && ssid[0] == ' ') | |
2050 | return 1; | |
2051 | ||
2052 | return 0; | |
2053 | } | |
2054 | ||
f698d856 | 2055 | static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2056 | struct ieee80211_if_sta *ifsta) |
2057 | { | |
f698d856 | 2058 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 2059 | struct ieee80211_bss *bss; |
8318d78a | 2060 | struct ieee80211_supported_band *sband; |
f0706e82 JB |
2061 | u8 bssid[ETH_ALEN], *pos; |
2062 | int i; | |
167ad6f7 | 2063 | int ret; |
f0706e82 JB |
2064 | |
2065 | #if 0 | |
2066 | /* Easier testing, use fixed BSSID. */ | |
2067 | memset(bssid, 0xfe, ETH_ALEN); | |
2068 | #else | |
2069 | /* Generate random, not broadcast, locally administered BSSID. Mix in | |
2070 | * own MAC address to make sure that devices that do not have proper | |
2071 | * random number generator get different BSSID. */ | |
2072 | get_random_bytes(bssid, ETH_ALEN); | |
2073 | for (i = 0; i < ETH_ALEN; i++) | |
f698d856 | 2074 | bssid[i] ^= sdata->dev->dev_addr[i]; |
f0706e82 JB |
2075 | bssid[0] &= ~0x01; |
2076 | bssid[0] |= 0x02; | |
2077 | #endif | |
2078 | ||
0c68ae26 JB |
2079 | printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %pM\n", |
2080 | sdata->dev->name, bssid); | |
f0706e82 | 2081 | |
98c8fccf | 2082 | bss = ieee80211_rx_bss_add(local, bssid, |
8318d78a | 2083 | local->hw.conf.channel->center_freq, |
cffdd30d | 2084 | sdata->u.sta.ssid, sdata->u.sta.ssid_len); |
f0706e82 JB |
2085 | if (!bss) |
2086 | return -ENOMEM; | |
2087 | ||
8318d78a JB |
2088 | bss->band = local->hw.conf.channel->band; |
2089 | sband = local->hw.wiphy->bands[bss->band]; | |
f0706e82 JB |
2090 | |
2091 | if (local->hw.conf.beacon_int == 0) | |
dc0ae30c | 2092 | local->hw.conf.beacon_int = 100; |
f0706e82 | 2093 | bss->beacon_int = local->hw.conf.beacon_int; |
f0706e82 JB |
2094 | bss->last_update = jiffies; |
2095 | bss->capability = WLAN_CAPABILITY_IBSS; | |
988c0f72 JB |
2096 | |
2097 | if (sdata->default_key) | |
f0706e82 | 2098 | bss->capability |= WLAN_CAPABILITY_PRIVACY; |
988c0f72 | 2099 | else |
f0706e82 | 2100 | sdata->drop_unencrypted = 0; |
988c0f72 | 2101 | |
8318d78a | 2102 | bss->supp_rates_len = sband->n_bitrates; |
f0706e82 | 2103 | pos = bss->supp_rates; |
8318d78a JB |
2104 | for (i = 0; i < sband->n_bitrates; i++) { |
2105 | int rate = sband->bitrates[i].bitrate; | |
f0706e82 JB |
2106 | *pos++ = (u8) (rate / 5); |
2107 | } | |
2108 | ||
f698d856 | 2109 | ret = ieee80211_sta_join_ibss(sdata, ifsta, bss); |
3e122be0 | 2110 | ieee80211_rx_bss_put(local, bss); |
167ad6f7 | 2111 | return ret; |
f0706e82 JB |
2112 | } |
2113 | ||
2114 | ||
f698d856 | 2115 | static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2116 | struct ieee80211_if_sta *ifsta) |
2117 | { | |
f698d856 | 2118 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 2119 | struct ieee80211_bss *bss; |
f0706e82 JB |
2120 | int found = 0; |
2121 | u8 bssid[ETH_ALEN]; | |
2122 | int active_ibss; | |
2123 | ||
2124 | if (ifsta->ssid_len == 0) | |
2125 | return -EINVAL; | |
2126 | ||
f698d856 | 2127 | active_ibss = ieee80211_sta_active_ibss(sdata); |
f0706e82 JB |
2128 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
2129 | printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n", | |
f698d856 | 2130 | sdata->dev->name, active_ibss); |
f0706e82 | 2131 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
c2b13452 JB |
2132 | spin_lock_bh(&local->bss_lock); |
2133 | list_for_each_entry(bss, &local->bss_list, list) { | |
f0706e82 JB |
2134 | if (ifsta->ssid_len != bss->ssid_len || |
2135 | memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0 | |
2136 | || !(bss->capability & WLAN_CAPABILITY_IBSS)) | |
2137 | continue; | |
2138 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0c68ae26 | 2139 | printk(KERN_DEBUG " bssid=%pM found\n", bss->bssid); |
f0706e82 JB |
2140 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
2141 | memcpy(bssid, bss->bssid, ETH_ALEN); | |
2142 | found = 1; | |
2143 | if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0) | |
2144 | break; | |
2145 | } | |
c2b13452 | 2146 | spin_unlock_bh(&local->bss_lock); |
f0706e82 JB |
2147 | |
2148 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
6e43829b | 2149 | if (found) |
0c68ae26 JB |
2150 | printk(KERN_DEBUG " sta_find_ibss: selected %pM current " |
2151 | "%pM\n", bssid, ifsta->bssid); | |
f0706e82 | 2152 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
80693ceb DD |
2153 | |
2154 | if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) { | |
167ad6f7 | 2155 | int ret; |
80693ceb DD |
2156 | int search_freq; |
2157 | ||
2158 | if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) | |
2159 | search_freq = bss->freq; | |
2160 | else | |
2161 | search_freq = local->hw.conf.channel->center_freq; | |
2162 | ||
f698d856 | 2163 | bss = ieee80211_rx_bss_get(local, bssid, search_freq, |
80693ceb DD |
2164 | ifsta->ssid, ifsta->ssid_len); |
2165 | if (!bss) | |
2166 | goto dont_join; | |
2167 | ||
0c68ae26 | 2168 | printk(KERN_DEBUG "%s: Selected IBSS BSSID %pM" |
f0706e82 | 2169 | " based on configured SSID\n", |
0c68ae26 | 2170 | sdata->dev->name, bssid); |
f698d856 | 2171 | ret = ieee80211_sta_join_ibss(sdata, ifsta, bss); |
3e122be0 | 2172 | ieee80211_rx_bss_put(local, bss); |
167ad6f7 | 2173 | return ret; |
f0706e82 | 2174 | } |
80693ceb DD |
2175 | |
2176 | dont_join: | |
f0706e82 JB |
2177 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
2178 | printk(KERN_DEBUG " did not try to join ibss\n"); | |
2179 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
2180 | ||
2181 | /* Selected IBSS not found in current scan results - try to scan */ | |
48c2fc59 | 2182 | if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED && |
f698d856 | 2183 | !ieee80211_sta_active_ibss(sdata)) { |
f0706e82 JB |
2184 | mod_timer(&ifsta->timer, jiffies + |
2185 | IEEE80211_IBSS_MERGE_INTERVAL); | |
2186 | } else if (time_after(jiffies, local->last_scan_completed + | |
2187 | IEEE80211_SCAN_INTERVAL)) { | |
2188 | printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to " | |
f698d856 | 2189 | "join\n", sdata->dev->name); |
c2b13452 | 2190 | return ieee80211_request_scan(sdata, ifsta->ssid, |
f0706e82 | 2191 | ifsta->ssid_len); |
48c2fc59 | 2192 | } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) { |
f0706e82 JB |
2193 | int interval = IEEE80211_SCAN_INTERVAL; |
2194 | ||
2195 | if (time_after(jiffies, ifsta->ibss_join_req + | |
2196 | IEEE80211_IBSS_JOIN_TIMEOUT)) { | |
d6f2da5b | 2197 | if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) && |
8318d78a JB |
2198 | (!(local->oper_channel->flags & |
2199 | IEEE80211_CHAN_NO_IBSS))) | |
f698d856 | 2200 | return ieee80211_sta_create_ibss(sdata, ifsta); |
d6f2da5b | 2201 | if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) { |
8318d78a | 2202 | printk(KERN_DEBUG "%s: IBSS not allowed on" |
f698d856 | 2203 | " %d MHz\n", sdata->dev->name, |
8318d78a | 2204 | local->hw.conf.channel->center_freq); |
f0706e82 JB |
2205 | } |
2206 | ||
2207 | /* No IBSS found - decrease scan interval and continue | |
2208 | * scanning. */ | |
2209 | interval = IEEE80211_SCAN_INTERVAL_SLOW; | |
2210 | } | |
2211 | ||
48c2fc59 | 2212 | ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH; |
f0706e82 JB |
2213 | mod_timer(&ifsta->timer, jiffies + interval); |
2214 | return 0; | |
2215 | } | |
2216 | ||
2217 | return 0; | |
2218 | } | |
2219 | ||
2220 | ||
9c6bd790 JB |
2221 | static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata, |
2222 | struct ieee80211_if_sta *ifsta) | |
f0706e82 | 2223 | { |
9c6bd790 | 2224 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 2225 | struct ieee80211_bss *bss, *selected = NULL; |
9c6bd790 | 2226 | int top_rssi = 0, freq; |
f0706e82 | 2227 | |
c2b13452 | 2228 | spin_lock_bh(&local->bss_lock); |
9c6bd790 | 2229 | freq = local->oper_channel->center_freq; |
c2b13452 | 2230 | list_for_each_entry(bss, &local->bss_list, list) { |
9c6bd790 JB |
2231 | if (!(bss->capability & WLAN_CAPABILITY_ESS)) |
2232 | continue; | |
f0706e82 | 2233 | |
9c6bd790 JB |
2234 | if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL | |
2235 | IEEE80211_STA_AUTO_BSSID_SEL | | |
2236 | IEEE80211_STA_AUTO_CHANNEL_SEL)) && | |
2237 | (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^ | |
2238 | !!sdata->default_key)) | |
2239 | continue; | |
f0706e82 | 2240 | |
9c6bd790 JB |
2241 | if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) && |
2242 | bss->freq != freq) | |
2243 | continue; | |
9d139c81 | 2244 | |
9c6bd790 JB |
2245 | if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) && |
2246 | memcmp(bss->bssid, ifsta->bssid, ETH_ALEN)) | |
2247 | continue; | |
f0706e82 | 2248 | |
9c6bd790 JB |
2249 | if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) && |
2250 | !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len)) | |
2251 | continue; | |
9d139c81 | 2252 | |
9c6bd790 JB |
2253 | if (!selected || top_rssi < bss->signal) { |
2254 | selected = bss; | |
2255 | top_rssi = bss->signal; | |
2256 | } | |
f0706e82 | 2257 | } |
9c6bd790 JB |
2258 | if (selected) |
2259 | atomic_inc(&selected->users); | |
c2b13452 | 2260 | spin_unlock_bh(&local->bss_lock); |
9d139c81 | 2261 | |
9c6bd790 JB |
2262 | if (selected) { |
2263 | ieee80211_set_freq(sdata, selected->freq); | |
2264 | if (!(ifsta->flags & IEEE80211_STA_SSID_SET)) | |
2265 | ieee80211_sta_set_ssid(sdata, selected->ssid, | |
2266 | selected->ssid_len); | |
2267 | ieee80211_sta_set_bssid(sdata, selected->bssid); | |
2268 | ieee80211_sta_def_wmm_params(sdata, selected); | |
f0706e82 | 2269 | |
9c6bd790 JB |
2270 | /* Send out direct probe if no probe resp was received or |
2271 | * the one we have is outdated | |
2272 | */ | |
2273 | if (!selected->last_probe_resp || | |
2274 | time_after(jiffies, selected->last_probe_resp | |
2275 | + IEEE80211_SCAN_RESULT_EXPIRE)) | |
2276 | ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE; | |
2277 | else | |
2278 | ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE; | |
f0706e82 | 2279 | |
9c6bd790 JB |
2280 | ieee80211_rx_bss_put(local, selected); |
2281 | ieee80211_sta_reset_auth(sdata, ifsta); | |
2282 | return 0; | |
2283 | } else { | |
2284 | if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) { | |
2285 | ifsta->assoc_scan_tries++; | |
2286 | if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) | |
c2b13452 | 2287 | ieee80211_start_scan(sdata, NULL, 0); |
9c6bd790 | 2288 | else |
c2b13452 | 2289 | ieee80211_start_scan(sdata, ifsta->ssid, |
9c6bd790 JB |
2290 | ifsta->ssid_len); |
2291 | ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE; | |
2292 | set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); | |
2293 | } else | |
2294 | ifsta->state = IEEE80211_STA_MLME_DISABLED; | |
2295 | } | |
2296 | return -1; | |
2297 | } | |
2298 | ||
2299 | ||
2300 | static void ieee80211_sta_work(struct work_struct *work) | |
2301 | { | |
2302 | struct ieee80211_sub_if_data *sdata = | |
2303 | container_of(work, struct ieee80211_sub_if_data, u.sta.work); | |
2304 | struct ieee80211_local *local = sdata->local; | |
2305 | struct ieee80211_if_sta *ifsta; | |
2306 | struct sk_buff *skb; | |
2307 | ||
2308 | if (!netif_running(sdata->dev)) | |
2309 | return; | |
2310 | ||
c2b13452 | 2311 | if (local->sw_scanning || local->hw_scanning) |
9c6bd790 JB |
2312 | return; |
2313 | ||
05c914fe JB |
2314 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION && |
2315 | sdata->vif.type != NL80211_IFTYPE_ADHOC)) | |
9c6bd790 | 2316 | return; |
f0706e82 JB |
2317 | ifsta = &sdata->u.sta; |
2318 | ||
9c6bd790 JB |
2319 | while ((skb = skb_dequeue(&ifsta->skb_queue))) |
2320 | ieee80211_sta_rx_queued_mgmt(sdata, skb); | |
2321 | ||
2322 | if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE && | |
2323 | ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE && | |
2324 | ifsta->state != IEEE80211_STA_MLME_ASSOCIATE && | |
2325 | test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) { | |
c2b13452 JB |
2326 | ieee80211_start_scan(sdata, ifsta->scan_ssid, |
2327 | ifsta->scan_ssid_len); | |
9c6bd790 | 2328 | return; |
f0706e82 JB |
2329 | } |
2330 | ||
9c6bd790 JB |
2331 | if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) { |
2332 | if (ieee80211_sta_config_auth(sdata, ifsta)) | |
2333 | return; | |
2334 | clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); | |
2335 | } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request)) | |
2336 | return; | |
d6f2da5b | 2337 | |
9c6bd790 JB |
2338 | switch (ifsta->state) { |
2339 | case IEEE80211_STA_MLME_DISABLED: | |
2340 | break; | |
2341 | case IEEE80211_STA_MLME_DIRECT_PROBE: | |
2342 | ieee80211_direct_probe(sdata, ifsta); | |
2343 | break; | |
2344 | case IEEE80211_STA_MLME_AUTHENTICATE: | |
2345 | ieee80211_authenticate(sdata, ifsta); | |
2346 | break; | |
2347 | case IEEE80211_STA_MLME_ASSOCIATE: | |
2348 | ieee80211_associate(sdata, ifsta); | |
2349 | break; | |
2350 | case IEEE80211_STA_MLME_ASSOCIATED: | |
2351 | ieee80211_associated(sdata, ifsta); | |
2352 | break; | |
2353 | case IEEE80211_STA_MLME_IBSS_SEARCH: | |
2354 | ieee80211_sta_find_ibss(sdata, ifsta); | |
2355 | break; | |
2356 | case IEEE80211_STA_MLME_IBSS_JOINED: | |
2357 | ieee80211_sta_merge_ibss(sdata, ifsta); | |
2358 | break; | |
2359 | default: | |
2360 | WARN_ON(1); | |
2361 | break; | |
2362 | } | |
2363 | ||
2364 | if (ieee80211_privacy_mismatch(sdata, ifsta)) { | |
2365 | printk(KERN_DEBUG "%s: privacy configuration mismatch and " | |
2366 | "mixed-cell disabled - disassociate\n", sdata->dev->name); | |
2367 | ||
2368 | ieee80211_set_disassoc(sdata, ifsta, false, true, | |
2369 | WLAN_REASON_UNSPECIFIED); | |
2370 | } | |
f0706e82 JB |
2371 | } |
2372 | ||
9c6bd790 JB |
2373 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
2374 | { | |
05c914fe | 2375 | if (sdata->vif.type == NL80211_IFTYPE_STATION) |
9c6bd790 JB |
2376 | queue_work(sdata->local->hw.workqueue, |
2377 | &sdata->u.sta.work); | |
2378 | } | |
f0706e82 | 2379 | |
9c6bd790 JB |
2380 | /* interface setup */ |
2381 | void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) | |
f0706e82 | 2382 | { |
9c6bd790 | 2383 | struct ieee80211_if_sta *ifsta; |
988c0f72 | 2384 | |
9c6bd790 JB |
2385 | ifsta = &sdata->u.sta; |
2386 | INIT_WORK(&ifsta->work, ieee80211_sta_work); | |
2387 | setup_timer(&ifsta->timer, ieee80211_sta_timer, | |
2388 | (unsigned long) sdata); | |
2389 | skb_queue_head_init(&ifsta->skb_queue); | |
2390 | ||
2391 | ifsta->capab = WLAN_CAPABILITY_ESS; | |
2392 | ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN | | |
2393 | IEEE80211_AUTH_ALG_SHARED_KEY; | |
2394 | ifsta->flags |= IEEE80211_STA_CREATE_IBSS | | |
2395 | IEEE80211_STA_AUTO_BSSID_SEL | | |
2396 | IEEE80211_STA_AUTO_CHANNEL_SEL; | |
2397 | if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4) | |
2398 | ifsta->flags |= IEEE80211_STA_WMM_ENABLED; | |
f0706e82 JB |
2399 | } |
2400 | ||
9c6bd790 JB |
2401 | /* |
2402 | * Add a new IBSS station, will also be called by the RX code when, | |
2403 | * in IBSS mode, receiving a frame from a yet-unknown station, hence | |
2404 | * must be callable in atomic context. | |
2405 | */ | |
f698d856 | 2406 | struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, |
ab1f5c0b | 2407 | u8 *bssid,u8 *addr, u64 supp_rates) |
f0706e82 | 2408 | { |
f698d856 | 2409 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 2410 | struct sta_info *sta; |
87291c02 | 2411 | int band = local->hw.conf.channel->band; |
f0706e82 JB |
2412 | |
2413 | /* TODO: Could consider removing the least recently used entry and | |
2414 | * allow new one to be added. */ | |
2415 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { | |
2416 | if (net_ratelimit()) { | |
2417 | printk(KERN_DEBUG "%s: No room for a new IBSS STA " | |
0c68ae26 | 2418 | "entry %pM\n", sdata->dev->name, addr); |
f0706e82 JB |
2419 | } |
2420 | return NULL; | |
2421 | } | |
2422 | ||
1e188637 | 2423 | if (compare_ether_addr(bssid, sdata->u.sta.bssid)) |
87291c02 VK |
2424 | return NULL; |
2425 | ||
f4ea83dd | 2426 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
0c68ae26 JB |
2427 | printk(KERN_DEBUG "%s: Adding new IBSS station %pM (dev=%s)\n", |
2428 | wiphy_name(local->hw.wiphy), addr, sdata->dev->name); | |
f4ea83dd | 2429 | #endif |
f0706e82 | 2430 | |
73651ee6 JB |
2431 | sta = sta_info_alloc(sdata, addr, GFP_ATOMIC); |
2432 | if (!sta) | |
f0706e82 JB |
2433 | return NULL; |
2434 | ||
07346f81 | 2435 | set_sta_flags(sta, WLAN_STA_AUTHORIZED); |
238814fd | 2436 | |
8e1535d5 | 2437 | /* make sure mandatory rates are always added */ |
323ce79a | 2438 | sta->sta.supp_rates[band] = supp_rates | |
96dd22ac | 2439 | ieee80211_mandatory_rates(local, band); |
f0706e82 | 2440 | |
4b7679a5 | 2441 | rate_control_rate_init(sta); |
f0706e82 | 2442 | |
93e5deb1 | 2443 | if (sta_info_insert(sta)) |
73651ee6 | 2444 | return NULL; |
73651ee6 | 2445 | |
d0709a65 | 2446 | return sta; |
f0706e82 JB |
2447 | } |
2448 | ||
9c6bd790 JB |
2449 | /* configuration hooks */ |
2450 | void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata, | |
2451 | struct ieee80211_if_sta *ifsta) | |
60f8b39c JB |
2452 | { |
2453 | struct ieee80211_local *local = sdata->local; | |
60f8b39c | 2454 | |
05c914fe | 2455 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
9c6bd790 | 2456 | return; |
60f8b39c | 2457 | |
9c6bd790 JB |
2458 | if ((ifsta->flags & (IEEE80211_STA_BSSID_SET | |
2459 | IEEE80211_STA_AUTO_BSSID_SEL)) && | |
2460 | (ifsta->flags & (IEEE80211_STA_SSID_SET | | |
2461 | IEEE80211_STA_AUTO_SSID_SEL))) { | |
60f8b39c | 2462 | |
9c6bd790 JB |
2463 | if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) |
2464 | ieee80211_set_disassoc(sdata, ifsta, true, true, | |
2465 | WLAN_REASON_DEAUTH_LEAVING); | |
60f8b39c | 2466 | |
9c6bd790 JB |
2467 | set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); |
2468 | queue_work(local->hw.workqueue, &ifsta->work); | |
2469 | } | |
2470 | } | |
60f8b39c | 2471 | |
9c6bd790 JB |
2472 | int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len) |
2473 | { | |
2474 | struct ieee80211_if_sta *ifsta; | |
60f8b39c | 2475 | |
9c6bd790 JB |
2476 | if (len > IEEE80211_MAX_SSID_LEN) |
2477 | return -EINVAL; | |
2478 | ||
2479 | ifsta = &sdata->u.sta; | |
2480 | ||
2481 | if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) { | |
2482 | memset(ifsta->ssid, 0, sizeof(ifsta->ssid)); | |
2483 | memcpy(ifsta->ssid, ssid, len); | |
2484 | ifsta->ssid_len = len; | |
2485 | ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET; | |
60f8b39c | 2486 | } |
60f8b39c | 2487 | |
9c6bd790 JB |
2488 | if (len) |
2489 | ifsta->flags |= IEEE80211_STA_SSID_SET; | |
2490 | else | |
2491 | ifsta->flags &= ~IEEE80211_STA_SSID_SET; | |
60f8b39c | 2492 | |
05c914fe | 2493 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && |
9c6bd790 JB |
2494 | !(ifsta->flags & IEEE80211_STA_BSSID_SET)) { |
2495 | ifsta->ibss_join_req = jiffies; | |
2496 | ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH; | |
2497 | return ieee80211_sta_find_ibss(sdata, ifsta); | |
2498 | } | |
2499 | ||
2500 | return 0; | |
2501 | } | |
2502 | ||
2503 | int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len) | |
2504 | { | |
2505 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
2506 | memcpy(ssid, ifsta->ssid, ifsta->ssid_len); | |
2507 | *len = ifsta->ssid_len; | |
2508 | return 0; | |
2509 | } | |
2510 | ||
2511 | int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid) | |
2512 | { | |
2513 | struct ieee80211_if_sta *ifsta; | |
2514 | int res; | |
2515 | ||
2516 | ifsta = &sdata->u.sta; | |
2517 | ||
2518 | if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) { | |
2519 | memcpy(ifsta->bssid, bssid, ETH_ALEN); | |
2520 | res = 0; | |
2521 | /* | |
2522 | * Hack! See also ieee80211_sta_set_ssid. | |
60f8b39c | 2523 | */ |
9c6bd790 JB |
2524 | if (netif_running(sdata->dev)) |
2525 | res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID); | |
2526 | if (res) { | |
2527 | printk(KERN_DEBUG "%s: Failed to config new BSSID to " | |
2528 | "the low-level driver\n", sdata->dev->name); | |
2529 | return res; | |
2530 | } | |
2531 | } | |
60f8b39c | 2532 | |
9c6bd790 JB |
2533 | if (is_valid_ether_addr(bssid)) |
2534 | ifsta->flags |= IEEE80211_STA_BSSID_SET; | |
2535 | else | |
2536 | ifsta->flags &= ~IEEE80211_STA_BSSID_SET; | |
2537 | ||
2538 | return 0; | |
2539 | } | |
2540 | ||
2541 | int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len) | |
2542 | { | |
2543 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
2544 | ||
2545 | kfree(ifsta->extra_ie); | |
2546 | if (len == 0) { | |
2547 | ifsta->extra_ie = NULL; | |
2548 | ifsta->extra_ie_len = 0; | |
60f8b39c | 2549 | return 0; |
60f8b39c | 2550 | } |
9c6bd790 JB |
2551 | ifsta->extra_ie = kmalloc(len, GFP_KERNEL); |
2552 | if (!ifsta->extra_ie) { | |
2553 | ifsta->extra_ie_len = 0; | |
2554 | return -ENOMEM; | |
2555 | } | |
2556 | memcpy(ifsta->extra_ie, ie, len); | |
2557 | ifsta->extra_ie_len = len; | |
2558 | return 0; | |
60f8b39c JB |
2559 | } |
2560 | ||
f698d856 | 2561 | int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 2562 | { |
f0706e82 JB |
2563 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
2564 | ||
f4ea83dd | 2565 | printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n", |
f698d856 | 2566 | sdata->dev->name, reason); |
f0706e82 | 2567 | |
05c914fe JB |
2568 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
2569 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
f0706e82 JB |
2570 | return -EINVAL; |
2571 | ||
aa458d17 | 2572 | ieee80211_set_disassoc(sdata, ifsta, true, true, reason); |
f0706e82 JB |
2573 | return 0; |
2574 | } | |
2575 | ||
f698d856 | 2576 | int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 2577 | { |
f0706e82 JB |
2578 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
2579 | ||
f4ea83dd | 2580 | printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n", |
f698d856 | 2581 | sdata->dev->name, reason); |
f0706e82 | 2582 | |
05c914fe | 2583 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
f0706e82 JB |
2584 | return -EINVAL; |
2585 | ||
d6f2da5b | 2586 | if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED)) |
f0706e82 JB |
2587 | return -1; |
2588 | ||
aa458d17 | 2589 | ieee80211_set_disassoc(sdata, ifsta, false, true, reason); |
f0706e82 JB |
2590 | return 0; |
2591 | } | |
84363e6e | 2592 | |
9c6bd790 JB |
2593 | /* scan finished notification */ |
2594 | void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) | |
2595 | { | |
2596 | struct ieee80211_sub_if_data *sdata = local->scan_sdata; | |
2597 | struct ieee80211_if_sta *ifsta; | |
2598 | ||
05c914fe | 2599 | if (sdata && sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
9c6bd790 JB |
2600 | ifsta = &sdata->u.sta; |
2601 | if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) || | |
2602 | (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) && | |
2603 | !ieee80211_sta_active_ibss(sdata))) | |
2604 | ieee80211_sta_find_ibss(sdata, ifsta); | |
2605 | } | |
2606 | ||
2607 | /* Restart STA timers */ | |
2608 | rcu_read_lock(); | |
2609 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
2610 | ieee80211_restart_sta_timer(sdata); | |
2611 | rcu_read_unlock(); | |
2612 | } | |
520eb820 KV |
2613 | |
2614 | void ieee80211_dynamic_ps_disable_work(struct work_struct *work) | |
2615 | { | |
2616 | struct ieee80211_local *local = | |
2617 | container_of(work, struct ieee80211_local, | |
2618 | dynamic_ps_disable_work); | |
2619 | ||
2620 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { | |
2621 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
2622 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
2623 | } | |
2624 | ||
2625 | ieee80211_wake_queues_by_reason(&local->hw, | |
2626 | IEEE80211_QUEUE_STOP_REASON_PS); | |
2627 | } | |
2628 | ||
2629 | void ieee80211_dynamic_ps_enable_work(struct work_struct *work) | |
2630 | { | |
2631 | struct ieee80211_local *local = | |
2632 | container_of(work, struct ieee80211_local, | |
2633 | dynamic_ps_enable_work); | |
2634 | ||
2635 | if (local->hw.conf.flags & IEEE80211_CONF_PS) | |
2636 | return; | |
2637 | ||
2638 | local->hw.conf.flags |= IEEE80211_CONF_PS; | |
2639 | ||
2640 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
2641 | } | |
2642 | ||
2643 | void ieee80211_dynamic_ps_timer(unsigned long data) | |
2644 | { | |
2645 | struct ieee80211_local *local = (void *) data; | |
2646 | ||
2647 | queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work); | |
2648 | } |