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Commit | Line | Data |
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f0706e82 JB |
1 | /* |
2 | * BSS client mode implementation | |
5394af4d | 3 | * Copyright 2003-2008, Jouni Malinen <j@w1.fi> |
f0706e82 JB |
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 | ||
5394af4d | 475 | ieee80211_tx_skb(sdata, skb, ifsta->flags & IEEE80211_STA_MFP_ENABLED); |
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 | ||
a97b77b9 VN |
578 | static bool check_tim(struct ieee802_11_elems *elems, u16 aid, bool *is_mc) |
579 | { | |
580 | u8 mask; | |
581 | u8 index, indexn1, indexn2; | |
582 | struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *) elems->tim; | |
583 | ||
584 | aid &= 0x3fff; | |
585 | index = aid / 8; | |
586 | mask = 1 << (aid & 7); | |
587 | ||
588 | if (tim->bitmap_ctrl & 0x01) | |
589 | *is_mc = true; | |
590 | ||
591 | indexn1 = tim->bitmap_ctrl & 0xfe; | |
592 | indexn2 = elems->tim_len + indexn1 - 4; | |
593 | ||
594 | if (index < indexn1 || index > indexn2) | |
595 | return false; | |
596 | ||
597 | index -= indexn1; | |
598 | ||
599 | return !!(tim->virtual_map[index] & mask); | |
600 | } | |
601 | ||
7a5158ef JB |
602 | static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, |
603 | u16 capab, bool erp_valid, u8 erp) | |
5628221c | 604 | { |
bda3933a | 605 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
ebd74487 | 606 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
5628221c | 607 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
ebd74487 | 608 | #endif |
471b3efd | 609 | u32 changed = 0; |
7a5158ef JB |
610 | bool use_protection; |
611 | bool use_short_preamble; | |
612 | bool use_short_slot; | |
613 | ||
614 | if (erp_valid) { | |
615 | use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; | |
616 | use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; | |
617 | } else { | |
618 | use_protection = false; | |
619 | use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); | |
620 | } | |
621 | ||
622 | use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); | |
5628221c | 623 | |
471b3efd | 624 | if (use_protection != bss_conf->use_cts_prot) { |
f4ea83dd | 625 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
5628221c | 626 | if (net_ratelimit()) { |
0c68ae26 | 627 | printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n", |
471b3efd | 628 | sdata->dev->name, |
5628221c | 629 | use_protection ? "enabled" : "disabled", |
0c68ae26 | 630 | ifsta->bssid); |
5628221c | 631 | } |
f4ea83dd | 632 | #endif |
471b3efd JB |
633 | bss_conf->use_cts_prot = use_protection; |
634 | changed |= BSS_CHANGED_ERP_CTS_PROT; | |
5628221c | 635 | } |
7e9ed188 | 636 | |
d43c7b37 | 637 | if (use_short_preamble != bss_conf->use_short_preamble) { |
f4ea83dd | 638 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
7e9ed188 DD |
639 | if (net_ratelimit()) { |
640 | printk(KERN_DEBUG "%s: switched to %s barker preamble" | |
0c68ae26 | 641 | " (BSSID=%pM)\n", |
471b3efd | 642 | sdata->dev->name, |
d43c7b37 | 643 | use_short_preamble ? "short" : "long", |
0c68ae26 | 644 | ifsta->bssid); |
7e9ed188 | 645 | } |
f4ea83dd | 646 | #endif |
d43c7b37 | 647 | bss_conf->use_short_preamble = use_short_preamble; |
471b3efd | 648 | changed |= BSS_CHANGED_ERP_PREAMBLE; |
7e9ed188 | 649 | } |
d9430a32 | 650 | |
7a5158ef JB |
651 | if (use_short_slot != bss_conf->use_short_slot) { |
652 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
653 | if (net_ratelimit()) { | |
391429c1 CL |
654 | printk(KERN_DEBUG "%s: switched to %s slot time" |
655 | " (BSSID=%pM)\n", | |
7a5158ef JB |
656 | sdata->dev->name, |
657 | use_short_slot ? "short" : "long", | |
658 | ifsta->bssid); | |
659 | } | |
660 | #endif | |
661 | bss_conf->use_short_slot = use_short_slot; | |
662 | changed |= BSS_CHANGED_ERP_SLOT; | |
50c4afb9 JL |
663 | } |
664 | ||
665 | return changed; | |
666 | } | |
667 | ||
f5e5bf25 TW |
668 | static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata, |
669 | struct ieee80211_if_sta *ifsta) | |
670 | { | |
671 | union iwreq_data wrqu; | |
672 | memset(&wrqu, 0, sizeof(wrqu)); | |
673 | if (ifsta->flags & IEEE80211_STA_ASSOCIATED) | |
674 | memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN); | |
675 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; | |
676 | wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL); | |
677 | } | |
678 | ||
f698d856 | 679 | static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
680 | struct ieee80211_if_sta *ifsta) |
681 | { | |
74af0250 LT |
682 | char *buf; |
683 | size_t len; | |
684 | int i; | |
f0706e82 JB |
685 | union iwreq_data wrqu; |
686 | ||
74af0250 LT |
687 | if (!ifsta->assocreq_ies && !ifsta->assocresp_ies) |
688 | return; | |
689 | ||
690 | buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len + | |
691 | ifsta->assocresp_ies_len), GFP_KERNEL); | |
692 | if (!buf) | |
693 | return; | |
694 | ||
695 | len = sprintf(buf, "ASSOCINFO("); | |
f0706e82 | 696 | if (ifsta->assocreq_ies) { |
74af0250 LT |
697 | len += sprintf(buf + len, "ReqIEs="); |
698 | for (i = 0; i < ifsta->assocreq_ies_len; i++) { | |
699 | len += sprintf(buf + len, "%02x", | |
700 | ifsta->assocreq_ies[i]); | |
701 | } | |
f0706e82 | 702 | } |
087d833e | 703 | if (ifsta->assocresp_ies) { |
74af0250 LT |
704 | if (ifsta->assocreq_ies) |
705 | len += sprintf(buf + len, " "); | |
706 | len += sprintf(buf + len, "RespIEs="); | |
707 | for (i = 0; i < ifsta->assocresp_ies_len; i++) { | |
708 | len += sprintf(buf + len, "%02x", | |
709 | ifsta->assocresp_ies[i]); | |
710 | } | |
f0706e82 | 711 | } |
74af0250 LT |
712 | len += sprintf(buf + len, ")"); |
713 | ||
714 | if (len > IW_CUSTOM_MAX) { | |
715 | len = sprintf(buf, "ASSOCRESPIE="); | |
716 | for (i = 0; i < ifsta->assocresp_ies_len; i++) { | |
717 | len += sprintf(buf + len, "%02x", | |
718 | ifsta->assocresp_ies[i]); | |
719 | } | |
720 | } | |
721 | ||
ad788b5e JL |
722 | if (len <= IW_CUSTOM_MAX) { |
723 | memset(&wrqu, 0, sizeof(wrqu)); | |
724 | wrqu.data.length = len; | |
725 | wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf); | |
726 | } | |
74af0250 LT |
727 | |
728 | kfree(buf); | |
f0706e82 JB |
729 | } |
730 | ||
731 | ||
f698d856 | 732 | static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
ae5eb026 JB |
733 | struct ieee80211_if_sta *ifsta, |
734 | u32 bss_info_changed) | |
f0706e82 | 735 | { |
471b3efd | 736 | struct ieee80211_local *local = sdata->local; |
38668c05 | 737 | struct ieee80211_conf *conf = &local_to_hw(local)->conf; |
f0706e82 | 738 | |
c2b13452 | 739 | struct ieee80211_bss *bss; |
d6f2da5b | 740 | |
ae5eb026 | 741 | bss_info_changed |= BSS_CHANGED_ASSOC; |
f5e5bf25 | 742 | ifsta->flags |= IEEE80211_STA_ASSOCIATED; |
5628221c | 743 | |
05c914fe | 744 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
f5e5bf25 | 745 | return; |
21c0cbe7 | 746 | |
f5e5bf25 TW |
747 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
748 | conf->channel->center_freq, | |
749 | ifsta->ssid, ifsta->ssid_len); | |
750 | if (bss) { | |
751 | /* set timing information */ | |
bda3933a JB |
752 | sdata->vif.bss_conf.beacon_int = bss->beacon_int; |
753 | sdata->vif.bss_conf.timestamp = bss->timestamp; | |
754 | sdata->vif.bss_conf.dtim_period = bss->dtim_period; | |
21c0cbe7 | 755 | |
ae5eb026 | 756 | bss_info_changed |= ieee80211_handle_bss_capability(sdata, |
7a5158ef | 757 | bss->capability, bss->has_erp_value, bss->erp_value); |
9ac19a90 JB |
758 | |
759 | ieee80211_rx_bss_put(local, bss); | |
f0706e82 JB |
760 | } |
761 | ||
9ac19a90 JB |
762 | ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET; |
763 | memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN); | |
764 | ieee80211_sta_send_associnfo(sdata, ifsta); | |
9306102e | 765 | |
9ac19a90 JB |
766 | ifsta->last_probe = jiffies; |
767 | ieee80211_led_assoc(local, 1); | |
9306102e | 768 | |
bda3933a | 769 | sdata->vif.bss_conf.assoc = 1; |
96dd22ac JB |
770 | /* |
771 | * For now just always ask the driver to update the basic rateset | |
772 | * when we have associated, we aren't checking whether it actually | |
773 | * changed or not. | |
774 | */ | |
ae5eb026 JB |
775 | bss_info_changed |= BSS_CHANGED_BASIC_RATES; |
776 | ieee80211_bss_info_change_notify(sdata, bss_info_changed); | |
f0706e82 | 777 | |
4be8c387 JB |
778 | if (local->powersave) { |
779 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) && | |
780 | local->hw.conf.dynamic_ps_timeout > 0) { | |
520eb820 | 781 | mod_timer(&local->dynamic_ps_timer, jiffies + |
46f2c4bd JB |
782 | msecs_to_jiffies( |
783 | local->hw.conf.dynamic_ps_timeout)); | |
4be8c387 JB |
784 | } else { |
785 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
786 | ieee80211_send_nullfunc(local, sdata, 1); | |
520eb820 | 787 | conf->flags |= IEEE80211_CONF_PS; |
4be8c387 | 788 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
520eb820 | 789 | } |
e0cb686f KV |
790 | } |
791 | ||
9ac19a90 JB |
792 | netif_tx_start_all_queues(sdata->dev); |
793 | netif_carrier_on(sdata->dev); | |
f0706e82 | 794 | |
9ac19a90 | 795 | ieee80211_sta_send_apinfo(sdata, ifsta); |
f0706e82 JB |
796 | } |
797 | ||
9ac19a90 JB |
798 | static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata, |
799 | struct ieee80211_if_sta *ifsta) | |
f0706e82 | 800 | { |
9ac19a90 JB |
801 | ifsta->direct_probe_tries++; |
802 | if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0c68ae26 JB |
803 | printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n", |
804 | sdata->dev->name, ifsta->bssid); | |
9ac19a90 | 805 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
4a68ec53 | 806 | ieee80211_sta_send_apinfo(sdata, ifsta); |
f0706e82 JB |
807 | return; |
808 | } | |
f0706e82 | 809 | |
0c68ae26 JB |
810 | printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n", |
811 | sdata->dev->name, ifsta->bssid, | |
9ac19a90 | 812 | ifsta->direct_probe_tries); |
f0706e82 | 813 | |
9ac19a90 | 814 | ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
f0706e82 | 815 | |
9ac19a90 JB |
816 | set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request); |
817 | ||
818 | /* Direct probe is sent to broadcast address as some APs | |
819 | * will not answer to direct packet in unassociated state. | |
820 | */ | |
821 | ieee80211_send_probe_req(sdata, NULL, | |
822 | ifsta->ssid, ifsta->ssid_len); | |
823 | ||
824 | mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT); | |
60f8b39c | 825 | } |
f0706e82 | 826 | |
9ac19a90 JB |
827 | |
828 | static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata, | |
829 | struct ieee80211_if_sta *ifsta) | |
f0706e82 | 830 | { |
9ac19a90 JB |
831 | ifsta->auth_tries++; |
832 | if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0c68ae26 | 833 | printk(KERN_DEBUG "%s: authentication with AP %pM" |
9ac19a90 | 834 | " timed out\n", |
0c68ae26 | 835 | sdata->dev->name, ifsta->bssid); |
9ac19a90 | 836 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
4a68ec53 | 837 | ieee80211_sta_send_apinfo(sdata, ifsta); |
f0706e82 JB |
838 | return; |
839 | } | |
f0706e82 | 840 | |
9ac19a90 | 841 | ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE; |
0c68ae26 JB |
842 | printk(KERN_DEBUG "%s: authenticate with AP %pM\n", |
843 | sdata->dev->name, ifsta->bssid); | |
f0706e82 | 844 | |
9ac19a90 JB |
845 | ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0); |
846 | ||
847 | mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT); | |
f0706e82 JB |
848 | } |
849 | ||
5925d976 VN |
850 | /* |
851 | * The disassoc 'reason' argument can be either our own reason | |
852 | * if self disconnected or a reason code from the AP. | |
853 | */ | |
aa458d17 TW |
854 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, |
855 | struct ieee80211_if_sta *ifsta, bool deauth, | |
856 | bool self_disconnected, u16 reason) | |
857 | { | |
858 | struct ieee80211_local *local = sdata->local; | |
859 | struct sta_info *sta; | |
e0cb686f | 860 | u32 changed = 0, config_changed = 0; |
aa458d17 TW |
861 | |
862 | rcu_read_lock(); | |
863 | ||
864 | sta = sta_info_get(local, ifsta->bssid); | |
865 | if (!sta) { | |
866 | rcu_read_unlock(); | |
867 | return; | |
868 | } | |
869 | ||
870 | if (deauth) { | |
871 | ifsta->direct_probe_tries = 0; | |
872 | ifsta->auth_tries = 0; | |
873 | } | |
874 | ifsta->assoc_scan_tries = 0; | |
875 | ifsta->assoc_tries = 0; | |
876 | ||
24e64622 | 877 | netif_tx_stop_all_queues(sdata->dev); |
aa458d17 TW |
878 | netif_carrier_off(sdata->dev); |
879 | ||
17741cdc | 880 | ieee80211_sta_tear_down_BA_sessions(sdata, sta->sta.addr); |
aa458d17 TW |
881 | |
882 | if (self_disconnected) { | |
883 | if (deauth) | |
ef422bc0 JB |
884 | ieee80211_send_deauth_disassoc(sdata, |
885 | IEEE80211_STYPE_DEAUTH, reason); | |
aa458d17 | 886 | else |
ef422bc0 JB |
887 | ieee80211_send_deauth_disassoc(sdata, |
888 | IEEE80211_STYPE_DISASSOC, reason); | |
aa458d17 TW |
889 | } |
890 | ||
f5e5bf25 TW |
891 | ifsta->flags &= ~IEEE80211_STA_ASSOCIATED; |
892 | changed |= ieee80211_reset_erp_info(sdata); | |
893 | ||
f5e5bf25 | 894 | ieee80211_led_assoc(local, 0); |
ae5eb026 JB |
895 | changed |= BSS_CHANGED_ASSOC; |
896 | sdata->vif.bss_conf.assoc = false; | |
f5e5bf25 TW |
897 | |
898 | ieee80211_sta_send_apinfo(sdata, ifsta); | |
aa458d17 | 899 | |
5925d976 | 900 | if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) |
aa458d17 TW |
901 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
902 | ||
aa458d17 TW |
903 | rcu_read_unlock(); |
904 | ||
4797938c | 905 | /* channel(_type) changes are handled by ieee80211_hw_config */ |
094d05dc | 906 | local->oper_channel_type = NL80211_CHAN_NO_HT; |
e0cb686f | 907 | |
a8302de9 VT |
908 | local->power_constr_level = 0; |
909 | ||
520eb820 KV |
910 | del_timer_sync(&local->dynamic_ps_timer); |
911 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
912 | ||
e0cb686f KV |
913 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
914 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
915 | config_changed |= IEEE80211_CONF_CHANGE_PS; | |
916 | } | |
ae5eb026 | 917 | |
e0cb686f | 918 | ieee80211_hw_config(local, config_changed); |
ae5eb026 | 919 | ieee80211_bss_info_change_notify(sdata, changed); |
8e268e47 TW |
920 | |
921 | rcu_read_lock(); | |
922 | ||
923 | sta = sta_info_get(local, ifsta->bssid); | |
924 | if (!sta) { | |
925 | rcu_read_unlock(); | |
926 | return; | |
927 | } | |
928 | ||
929 | sta_info_unlink(&sta); | |
930 | ||
931 | rcu_read_unlock(); | |
932 | ||
933 | sta_info_destroy(sta); | |
aa458d17 | 934 | } |
f0706e82 | 935 | |
9ac19a90 JB |
936 | static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata) |
937 | { | |
938 | if (!sdata || !sdata->default_key || | |
939 | sdata->default_key->conf.alg != ALG_WEP) | |
940 | return 0; | |
941 | return 1; | |
942 | } | |
943 | ||
f698d856 | 944 | static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
945 | struct ieee80211_if_sta *ifsta) |
946 | { | |
f698d856 | 947 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 948 | struct ieee80211_bss *bss; |
5b98b1f7 JB |
949 | int bss_privacy; |
950 | int wep_privacy; | |
951 | int privacy_invoked; | |
f0706e82 | 952 | |
5b98b1f7 | 953 | if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL)) |
f0706e82 JB |
954 | return 0; |
955 | ||
f698d856 | 956 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
8318d78a | 957 | local->hw.conf.channel->center_freq, |
cffdd30d | 958 | ifsta->ssid, ifsta->ssid_len); |
f0706e82 JB |
959 | if (!bss) |
960 | return 0; | |
961 | ||
5b98b1f7 | 962 | bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY); |
f698d856 | 963 | wep_privacy = !!ieee80211_sta_wep_configured(sdata); |
5b98b1f7 | 964 | privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED); |
f0706e82 | 965 | |
3e122be0 | 966 | ieee80211_rx_bss_put(local, bss); |
f0706e82 | 967 | |
5b98b1f7 JB |
968 | if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked)) |
969 | return 0; | |
970 | ||
971 | return 1; | |
f0706e82 JB |
972 | } |
973 | ||
f698d856 | 974 | static void ieee80211_associate(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
975 | struct ieee80211_if_sta *ifsta) |
976 | { | |
977 | ifsta->assoc_tries++; | |
978 | if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) { | |
0c68ae26 | 979 | printk(KERN_DEBUG "%s: association with AP %pM" |
f0706e82 | 980 | " timed out\n", |
0c68ae26 | 981 | sdata->dev->name, ifsta->bssid); |
48c2fc59 | 982 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
4a68ec53 | 983 | ieee80211_sta_send_apinfo(sdata, ifsta); |
f0706e82 JB |
984 | return; |
985 | } | |
986 | ||
48c2fc59 | 987 | ifsta->state = IEEE80211_STA_MLME_ASSOCIATE; |
0c68ae26 JB |
988 | printk(KERN_DEBUG "%s: associate with AP %pM\n", |
989 | sdata->dev->name, ifsta->bssid); | |
f698d856 | 990 | if (ieee80211_privacy_mismatch(sdata, ifsta)) { |
f0706e82 | 991 | printk(KERN_DEBUG "%s: mismatch in privacy configuration and " |
f698d856 | 992 | "mixed-cell disabled - abort association\n", sdata->dev->name); |
48c2fc59 | 993 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
f0706e82 JB |
994 | return; |
995 | } | |
996 | ||
f698d856 | 997 | ieee80211_send_assoc(sdata, ifsta); |
f0706e82 JB |
998 | |
999 | mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT); | |
1000 | } | |
1001 | ||
1002 | ||
f698d856 | 1003 | static void ieee80211_associated(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1004 | struct ieee80211_if_sta *ifsta) |
1005 | { | |
f698d856 | 1006 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1007 | struct sta_info *sta; |
1008 | int disassoc; | |
1009 | ||
1010 | /* TODO: start monitoring current AP signal quality and number of | |
1011 | * missed beacons. Scan other channels every now and then and search | |
1012 | * for better APs. */ | |
1013 | /* TODO: remove expired BSSes */ | |
1014 | ||
48c2fc59 | 1015 | ifsta->state = IEEE80211_STA_MLME_ASSOCIATED; |
f0706e82 | 1016 | |
d0709a65 JB |
1017 | rcu_read_lock(); |
1018 | ||
f0706e82 JB |
1019 | sta = sta_info_get(local, ifsta->bssid); |
1020 | if (!sta) { | |
0c68ae26 JB |
1021 | printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n", |
1022 | sdata->dev->name, ifsta->bssid); | |
f0706e82 JB |
1023 | disassoc = 1; |
1024 | } else { | |
1025 | disassoc = 0; | |
1026 | if (time_after(jiffies, | |
1027 | sta->last_rx + IEEE80211_MONITORING_INTERVAL)) { | |
d6f2da5b | 1028 | if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) { |
f0706e82 | 1029 | printk(KERN_DEBUG "%s: No ProbeResp from " |
0c68ae26 | 1030 | "current AP %pM - assume out of " |
f0706e82 | 1031 | "range\n", |
0c68ae26 | 1032 | sdata->dev->name, ifsta->bssid); |
f0706e82 | 1033 | disassoc = 1; |
d6f2da5b | 1034 | } else |
f698d856 | 1035 | ieee80211_send_probe_req(sdata, ifsta->bssid, |
4dfe51e1 JB |
1036 | ifsta->ssid, |
1037 | ifsta->ssid_len); | |
d6f2da5b | 1038 | ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL; |
f0706e82 | 1039 | } else { |
d6f2da5b | 1040 | ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL; |
f0706e82 JB |
1041 | if (time_after(jiffies, ifsta->last_probe + |
1042 | IEEE80211_PROBE_INTERVAL)) { | |
1043 | ifsta->last_probe = jiffies; | |
f698d856 | 1044 | ieee80211_send_probe_req(sdata, ifsta->bssid, |
f0706e82 JB |
1045 | ifsta->ssid, |
1046 | ifsta->ssid_len); | |
1047 | } | |
1048 | } | |
f0706e82 | 1049 | } |
d0709a65 JB |
1050 | |
1051 | rcu_read_unlock(); | |
1052 | ||
60f8b39c JB |
1053 | if (disassoc) |
1054 | ieee80211_set_disassoc(sdata, ifsta, true, true, | |
1055 | WLAN_REASON_PREV_AUTH_NOT_VALID); | |
1056 | else | |
1057 | mod_timer(&ifsta->timer, jiffies + | |
1058 | IEEE80211_MONITORING_INTERVAL); | |
f0706e82 JB |
1059 | } |
1060 | ||
1061 | ||
f698d856 | 1062 | static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1063 | struct ieee80211_if_sta *ifsta) |
1064 | { | |
f698d856 | 1065 | printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name); |
d6f2da5b | 1066 | ifsta->flags |= IEEE80211_STA_AUTHENTICATED; |
f698d856 | 1067 | ieee80211_associate(sdata, ifsta); |
f0706e82 JB |
1068 | } |
1069 | ||
1070 | ||
f698d856 | 1071 | static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1072 | struct ieee80211_if_sta *ifsta, |
1073 | struct ieee80211_mgmt *mgmt, | |
1074 | size_t len) | |
1075 | { | |
1076 | u8 *pos; | |
1077 | struct ieee802_11_elems elems; | |
1078 | ||
f0706e82 | 1079 | pos = mgmt->u.auth.variable; |
67a4cce4 | 1080 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
f4ea83dd | 1081 | if (!elems.challenge) |
f0706e82 | 1082 | return; |
f698d856 | 1083 | ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2, |
f0706e82 JB |
1084 | elems.challenge_len + 2, 1); |
1085 | } | |
1086 | ||
f698d856 | 1087 | static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1088 | struct ieee80211_if_sta *ifsta, |
1089 | struct ieee80211_mgmt *mgmt, | |
1090 | size_t len) | |
1091 | { | |
f0706e82 JB |
1092 | u16 auth_alg, auth_transaction, status_code; |
1093 | ||
48c2fc59 | 1094 | if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE && |
05c914fe | 1095 | sdata->vif.type != NL80211_IFTYPE_ADHOC) |
f0706e82 | 1096 | return; |
f0706e82 | 1097 | |
f4ea83dd | 1098 | if (len < 24 + 6) |
f0706e82 | 1099 | return; |
f0706e82 | 1100 | |
05c914fe | 1101 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC && |
f4ea83dd | 1102 | memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1103 | return; |
f0706e82 | 1104 | |
05c914fe | 1105 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC && |
f4ea83dd | 1106 | memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) |
f0706e82 | 1107 | return; |
f0706e82 JB |
1108 | |
1109 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
1110 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
1111 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
1112 | ||
05c914fe | 1113 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
135a2110 JB |
1114 | /* |
1115 | * IEEE 802.11 standard does not require authentication in IBSS | |
f0706e82 JB |
1116 | * networks and most implementations do not seem to use it. |
1117 | * However, try to reply to authentication attempts if someone | |
1118 | * has actually implemented this. | |
135a2110 | 1119 | */ |
f4ea83dd | 1120 | if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) |
f0706e82 | 1121 | return; |
f698d856 | 1122 | ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0); |
f0706e82 JB |
1123 | } |
1124 | ||
1125 | if (auth_alg != ifsta->auth_alg || | |
f4ea83dd | 1126 | auth_transaction != ifsta->auth_transaction) |
f0706e82 | 1127 | return; |
f0706e82 JB |
1128 | |
1129 | if (status_code != WLAN_STATUS_SUCCESS) { | |
f0706e82 JB |
1130 | if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) { |
1131 | u8 algs[3]; | |
1132 | const int num_algs = ARRAY_SIZE(algs); | |
1133 | int i, pos; | |
1134 | algs[0] = algs[1] = algs[2] = 0xff; | |
1135 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
1136 | algs[0] = WLAN_AUTH_OPEN; | |
1137 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
1138 | algs[1] = WLAN_AUTH_SHARED_KEY; | |
1139 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
1140 | algs[2] = WLAN_AUTH_LEAP; | |
1141 | if (ifsta->auth_alg == WLAN_AUTH_OPEN) | |
1142 | pos = 0; | |
1143 | else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY) | |
1144 | pos = 1; | |
1145 | else | |
1146 | pos = 2; | |
1147 | for (i = 0; i < num_algs; i++) { | |
1148 | pos++; | |
1149 | if (pos >= num_algs) | |
1150 | pos = 0; | |
1151 | if (algs[pos] == ifsta->auth_alg || | |
1152 | algs[pos] == 0xff) | |
1153 | continue; | |
1154 | if (algs[pos] == WLAN_AUTH_SHARED_KEY && | |
f698d856 | 1155 | !ieee80211_sta_wep_configured(sdata)) |
f0706e82 JB |
1156 | continue; |
1157 | ifsta->auth_alg = algs[pos]; | |
f0706e82 JB |
1158 | break; |
1159 | } | |
1160 | } | |
1161 | return; | |
1162 | } | |
1163 | ||
1164 | switch (ifsta->auth_alg) { | |
1165 | case WLAN_AUTH_OPEN: | |
1166 | case WLAN_AUTH_LEAP: | |
f698d856 | 1167 | ieee80211_auth_completed(sdata, ifsta); |
f0706e82 JB |
1168 | break; |
1169 | case WLAN_AUTH_SHARED_KEY: | |
1170 | if (ifsta->auth_transaction == 4) | |
f698d856 | 1171 | ieee80211_auth_completed(sdata, ifsta); |
f0706e82 | 1172 | else |
f698d856 | 1173 | ieee80211_auth_challenge(sdata, ifsta, mgmt, len); |
f0706e82 JB |
1174 | break; |
1175 | } | |
1176 | } | |
1177 | ||
1178 | ||
f698d856 | 1179 | static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1180 | struct ieee80211_if_sta *ifsta, |
1181 | struct ieee80211_mgmt *mgmt, | |
1182 | size_t len) | |
1183 | { | |
1184 | u16 reason_code; | |
1185 | ||
f4ea83dd | 1186 | if (len < 24 + 2) |
f0706e82 | 1187 | return; |
f0706e82 | 1188 | |
f4ea83dd | 1189 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1190 | return; |
f0706e82 JB |
1191 | |
1192 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
1193 | ||
988c0f72 | 1194 | if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) |
97c8b013 ZY |
1195 | printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n", |
1196 | sdata->dev->name, reason_code); | |
f0706e82 | 1197 | |
48c2fc59 TW |
1198 | if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE || |
1199 | ifsta->state == IEEE80211_STA_MLME_ASSOCIATE || | |
1200 | ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) { | |
9859b81e | 1201 | ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
f0706e82 JB |
1202 | mod_timer(&ifsta->timer, jiffies + |
1203 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1204 | } | |
1205 | ||
aa458d17 | 1206 | ieee80211_set_disassoc(sdata, ifsta, true, false, 0); |
d6f2da5b | 1207 | ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED; |
f0706e82 JB |
1208 | } |
1209 | ||
1210 | ||
f698d856 | 1211 | static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1212 | struct ieee80211_if_sta *ifsta, |
1213 | struct ieee80211_mgmt *mgmt, | |
1214 | size_t len) | |
1215 | { | |
1216 | u16 reason_code; | |
1217 | ||
f4ea83dd | 1218 | if (len < 24 + 2) |
f0706e82 | 1219 | return; |
f0706e82 | 1220 | |
f4ea83dd | 1221 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1222 | return; |
f0706e82 JB |
1223 | |
1224 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
1225 | ||
d6f2da5b | 1226 | if (ifsta->flags & IEEE80211_STA_ASSOCIATED) |
97c8b013 ZY |
1227 | printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n", |
1228 | sdata->dev->name, reason_code); | |
f0706e82 | 1229 | |
48c2fc59 TW |
1230 | if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) { |
1231 | ifsta->state = IEEE80211_STA_MLME_ASSOCIATE; | |
f0706e82 JB |
1232 | mod_timer(&ifsta->timer, jiffies + |
1233 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1234 | } | |
1235 | ||
5925d976 | 1236 | ieee80211_set_disassoc(sdata, ifsta, false, false, reason_code); |
f0706e82 JB |
1237 | } |
1238 | ||
1239 | ||
471b3efd | 1240 | static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1241 | struct ieee80211_if_sta *ifsta, |
1242 | struct ieee80211_mgmt *mgmt, | |
1243 | size_t len, | |
1244 | int reassoc) | |
1245 | { | |
471b3efd | 1246 | struct ieee80211_local *local = sdata->local; |
8318d78a | 1247 | struct ieee80211_supported_band *sband; |
f0706e82 | 1248 | struct sta_info *sta; |
8318d78a | 1249 | u64 rates, basic_rates; |
f0706e82 JB |
1250 | u16 capab_info, status_code, aid; |
1251 | struct ieee802_11_elems elems; | |
bda3933a | 1252 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
f0706e82 | 1253 | u8 *pos; |
ae5eb026 | 1254 | u32 changed = 0; |
f0706e82 | 1255 | int i, j; |
ddf4ac53 | 1256 | bool have_higher_than_11mbit = false, newsta = false; |
ae5eb026 | 1257 | u16 ap_ht_cap_flags; |
f0706e82 JB |
1258 | |
1259 | /* AssocResp and ReassocResp have identical structure, so process both | |
1260 | * of them in this function. */ | |
1261 | ||
48c2fc59 | 1262 | if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE) |
f0706e82 | 1263 | return; |
f0706e82 | 1264 | |
f4ea83dd | 1265 | if (len < 24 + 6) |
f0706e82 | 1266 | return; |
f0706e82 | 1267 | |
f4ea83dd | 1268 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1269 | return; |
f0706e82 JB |
1270 | |
1271 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
1272 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
1273 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
f0706e82 | 1274 | |
0c68ae26 | 1275 | printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x " |
f0706e82 | 1276 | "status=%d aid=%d)\n", |
0c68ae26 | 1277 | sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa, |
ddd68587 | 1278 | capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); |
f0706e82 | 1279 | |
63a5ab82 JM |
1280 | pos = mgmt->u.assoc_resp.variable; |
1281 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
1282 | ||
1283 | if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && | |
1284 | elems.assoc_comeback && elems.assoc_comeback_len == 4) { | |
1285 | u32 tu, ms; | |
1286 | tu = get_unaligned_le32(elems.assoc_comeback); | |
1287 | ms = tu * 1024 / 1000; | |
1288 | printk(KERN_DEBUG "%s: AP rejected association temporarily; " | |
1289 | "comeback duration %u TU (%u ms)\n", | |
1290 | sdata->dev->name, tu, ms); | |
1291 | if (ms > IEEE80211_ASSOC_TIMEOUT) | |
1292 | mod_timer(&ifsta->timer, | |
1293 | jiffies + msecs_to_jiffies(ms)); | |
1294 | return; | |
1295 | } | |
1296 | ||
f0706e82 JB |
1297 | if (status_code != WLAN_STATUS_SUCCESS) { |
1298 | printk(KERN_DEBUG "%s: AP denied association (code=%d)\n", | |
f698d856 | 1299 | sdata->dev->name, status_code); |
8a69aa93 DD |
1300 | /* if this was a reassociation, ensure we try a "full" |
1301 | * association next time. This works around some broken APs | |
1302 | * which do not correctly reject reassociation requests. */ | |
d6f2da5b | 1303 | ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
f0706e82 JB |
1304 | return; |
1305 | } | |
1306 | ||
1dd84aa2 JB |
1307 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
1308 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " | |
f698d856 | 1309 | "set\n", sdata->dev->name, aid); |
1dd84aa2 JB |
1310 | aid &= ~(BIT(15) | BIT(14)); |
1311 | ||
f0706e82 JB |
1312 | if (!elems.supp_rates) { |
1313 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", | |
f698d856 | 1314 | sdata->dev->name); |
f0706e82 JB |
1315 | return; |
1316 | } | |
1317 | ||
f698d856 | 1318 | printk(KERN_DEBUG "%s: associated\n", sdata->dev->name); |
f0706e82 JB |
1319 | ifsta->aid = aid; |
1320 | ifsta->ap_capab = capab_info; | |
1321 | ||
1322 | kfree(ifsta->assocresp_ies); | |
1323 | ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt); | |
0ec0b7ac | 1324 | ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL); |
f0706e82 JB |
1325 | if (ifsta->assocresp_ies) |
1326 | memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len); | |
1327 | ||
d0709a65 JB |
1328 | rcu_read_lock(); |
1329 | ||
f0706e82 JB |
1330 | /* Add STA entry for the AP */ |
1331 | sta = sta_info_get(local, ifsta->bssid); | |
1332 | if (!sta) { | |
c2b13452 | 1333 | struct ieee80211_bss *bss; |
ddf4ac53 JB |
1334 | |
1335 | newsta = true; | |
d0709a65 | 1336 | |
73651ee6 JB |
1337 | sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC); |
1338 | if (!sta) { | |
1339 | printk(KERN_DEBUG "%s: failed to alloc STA entry for" | |
f698d856 | 1340 | " the AP\n", sdata->dev->name); |
d0709a65 | 1341 | rcu_read_unlock(); |
f0706e82 JB |
1342 | return; |
1343 | } | |
60f8b39c JB |
1344 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
1345 | local->hw.conf.channel->center_freq, | |
1346 | ifsta->ssid, ifsta->ssid_len); | |
1347 | if (bss) { | |
1348 | sta->last_signal = bss->signal; | |
1349 | sta->last_qual = bss->qual; | |
1350 | sta->last_noise = bss->noise; | |
1351 | ieee80211_rx_bss_put(local, bss); | |
1352 | } | |
f709fc69 | 1353 | |
60f8b39c JB |
1354 | /* update new sta with its last rx activity */ |
1355 | sta->last_rx = jiffies; | |
f709fc69 | 1356 | } |
f709fc69 | 1357 | |
60f8b39c JB |
1358 | /* |
1359 | * FIXME: Do we really need to update the sta_info's information here? | |
1360 | * We already know about the AP (we found it in our list) so it | |
1361 | * should already be filled with the right info, no? | |
1362 | * As is stands, all this is racy because typically we assume | |
1363 | * the information that is filled in here (except flags) doesn't | |
1364 | * change while a STA structure is alive. As such, it should move | |
1365 | * to between the sta_info_alloc() and sta_info_insert() above. | |
1366 | */ | |
f709fc69 | 1367 | |
60f8b39c JB |
1368 | set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP | |
1369 | WLAN_STA_AUTHORIZED); | |
05e5e883 | 1370 | |
60f8b39c JB |
1371 | rates = 0; |
1372 | basic_rates = 0; | |
1373 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
f709fc69 | 1374 | |
60f8b39c JB |
1375 | for (i = 0; i < elems.supp_rates_len; i++) { |
1376 | int rate = (elems.supp_rates[i] & 0x7f) * 5; | |
d61272cb | 1377 | bool is_basic = !!(elems.supp_rates[i] & 0x80); |
f709fc69 | 1378 | |
60f8b39c JB |
1379 | if (rate > 110) |
1380 | have_higher_than_11mbit = true; | |
1381 | ||
1382 | for (j = 0; j < sband->n_bitrates; j++) { | |
d61272cb | 1383 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1384 | rates |= BIT(j); |
d61272cb TW |
1385 | if (is_basic) |
1386 | basic_rates |= BIT(j); | |
1387 | break; | |
1388 | } | |
f709fc69 | 1389 | } |
f709fc69 LCC |
1390 | } |
1391 | ||
60f8b39c JB |
1392 | for (i = 0; i < elems.ext_supp_rates_len; i++) { |
1393 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; | |
d61272cb | 1394 | bool is_basic = !!(elems.supp_rates[i] & 0x80); |
f0706e82 | 1395 | |
60f8b39c JB |
1396 | if (rate > 110) |
1397 | have_higher_than_11mbit = true; | |
f0706e82 | 1398 | |
60f8b39c | 1399 | for (j = 0; j < sband->n_bitrates; j++) { |
d61272cb | 1400 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1401 | rates |= BIT(j); |
d61272cb TW |
1402 | if (is_basic) |
1403 | basic_rates |= BIT(j); | |
1404 | break; | |
1405 | } | |
60f8b39c | 1406 | } |
1ebebea8 | 1407 | } |
f0706e82 | 1408 | |
323ce79a | 1409 | sta->sta.supp_rates[local->hw.conf.channel->band] = rates; |
bda3933a | 1410 | sdata->vif.bss_conf.basic_rates = basic_rates; |
60f8b39c JB |
1411 | |
1412 | /* cf. IEEE 802.11 9.2.12 */ | |
1413 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
1414 | have_higher_than_11mbit) | |
1415 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
1416 | else | |
1417 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
f0706e82 | 1418 | |
ae5eb026 JB |
1419 | if (elems.ht_cap_elem) |
1420 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, | |
d9fe60de | 1421 | elems.ht_cap_elem, &sta->sta.ht_cap); |
ae5eb026 JB |
1422 | |
1423 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
f0706e82 | 1424 | |
4b7679a5 | 1425 | rate_control_rate_init(sta); |
f0706e82 | 1426 | |
5394af4d JM |
1427 | if (ifsta->flags & IEEE80211_STA_MFP_ENABLED) |
1428 | set_sta_flags(sta, WLAN_STA_MFP); | |
1429 | ||
ddf4ac53 | 1430 | if (elems.wmm_param) |
60f8b39c | 1431 | set_sta_flags(sta, WLAN_STA_WME); |
ddf4ac53 JB |
1432 | |
1433 | if (newsta) { | |
1434 | int err = sta_info_insert(sta); | |
1435 | if (err) { | |
1436 | printk(KERN_DEBUG "%s: failed to insert STA entry for" | |
1437 | " the AP (error %d)\n", sdata->dev->name, err); | |
1438 | rcu_read_unlock(); | |
1439 | return; | |
1440 | } | |
1441 | } | |
1442 | ||
1443 | rcu_read_unlock(); | |
1444 | ||
1445 | if (elems.wmm_param) | |
60f8b39c JB |
1446 | ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param, |
1447 | elems.wmm_param_len); | |
f0706e82 | 1448 | |
ae5eb026 JB |
1449 | if (elems.ht_info_elem && elems.wmm_param && |
1450 | (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) | |
1451 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, | |
1452 | ap_ht_cap_flags); | |
1453 | ||
60f8b39c JB |
1454 | /* set AID and assoc capability, |
1455 | * ieee80211_set_associated() will tell the driver */ | |
1456 | bss_conf->aid = aid; | |
1457 | bss_conf->assoc_capability = capab_info; | |
ae5eb026 | 1458 | ieee80211_set_associated(sdata, ifsta, changed); |
f0706e82 | 1459 | |
60f8b39c | 1460 | ieee80211_associated(sdata, ifsta); |
f0706e82 JB |
1461 | } |
1462 | ||
1463 | ||
f698d856 | 1464 | static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, |
a607268a | 1465 | struct ieee80211_if_sta *ifsta, |
c2b13452 | 1466 | struct ieee80211_bss *bss) |
a607268a | 1467 | { |
f698d856 | 1468 | struct ieee80211_local *local = sdata->local; |
a607268a BR |
1469 | int res, rates, i, j; |
1470 | struct sk_buff *skb; | |
1471 | struct ieee80211_mgmt *mgmt; | |
a607268a | 1472 | u8 *pos; |
a607268a | 1473 | struct ieee80211_supported_band *sband; |
507b06d0 | 1474 | union iwreq_data wrqu; |
a607268a | 1475 | |
e2ef12d3 RR |
1476 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400); |
1477 | if (!skb) { | |
1478 | printk(KERN_DEBUG "%s: failed to allocate buffer for probe " | |
1479 | "response\n", sdata->dev->name); | |
1480 | return -ENOMEM; | |
1481 | } | |
1482 | ||
a607268a BR |
1483 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
1484 | ||
1485 | /* Remove possible STA entries from other IBSS networks. */ | |
dc6676b7 | 1486 | sta_info_flush_delayed(sdata); |
a607268a BR |
1487 | |
1488 | if (local->ops->reset_tsf) { | |
1489 | /* Reset own TSF to allow time synchronization work. */ | |
1490 | local->ops->reset_tsf(local_to_hw(local)); | |
1491 | } | |
1492 | memcpy(ifsta->bssid, bss->bssid, ETH_ALEN); | |
9d139c81 | 1493 | res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID); |
a607268a BR |
1494 | if (res) |
1495 | return res; | |
1496 | ||
1497 | local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10; | |
1498 | ||
a607268a BR |
1499 | sdata->drop_unencrypted = bss->capability & |
1500 | WLAN_CAPABILITY_PRIVACY ? 1 : 0; | |
1501 | ||
f698d856 | 1502 | res = ieee80211_set_freq(sdata, bss->freq); |
a607268a | 1503 | |
be038b37 AK |
1504 | if (res) |
1505 | return res; | |
a607268a | 1506 | |
9d139c81 | 1507 | /* Build IBSS probe response */ |
a607268a | 1508 | |
e2ef12d3 | 1509 | skb_reserve(skb, local->hw.extra_tx_headroom); |
a607268a | 1510 | |
e2ef12d3 RR |
1511 | mgmt = (struct ieee80211_mgmt *) |
1512 | skb_put(skb, 24 + sizeof(mgmt->u.beacon)); | |
1513 | memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon)); | |
1514 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
1515 | IEEE80211_STYPE_PROBE_RESP); | |
1516 | memset(mgmt->da, 0xff, ETH_ALEN); | |
1517 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); | |
1518 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
1519 | mgmt->u.beacon.beacon_int = | |
1520 | cpu_to_le16(local->hw.conf.beacon_int); | |
1521 | mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp); | |
1522 | mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability); | |
a607268a | 1523 | |
e2ef12d3 RR |
1524 | pos = skb_put(skb, 2 + ifsta->ssid_len); |
1525 | *pos++ = WLAN_EID_SSID; | |
1526 | *pos++ = ifsta->ssid_len; | |
1527 | memcpy(pos, ifsta->ssid, ifsta->ssid_len); | |
a607268a | 1528 | |
e2ef12d3 RR |
1529 | rates = bss->supp_rates_len; |
1530 | if (rates > 8) | |
1531 | rates = 8; | |
1532 | pos = skb_put(skb, 2 + rates); | |
1533 | *pos++ = WLAN_EID_SUPP_RATES; | |
1534 | *pos++ = rates; | |
1535 | memcpy(pos, bss->supp_rates, rates); | |
1536 | ||
1537 | if (bss->band == IEEE80211_BAND_2GHZ) { | |
1538 | pos = skb_put(skb, 2 + 1); | |
1539 | *pos++ = WLAN_EID_DS_PARAMS; | |
1540 | *pos++ = 1; | |
1541 | *pos++ = ieee80211_frequency_to_channel(bss->freq); | |
1542 | } | |
a607268a | 1543 | |
e2ef12d3 RR |
1544 | pos = skb_put(skb, 2 + 2); |
1545 | *pos++ = WLAN_EID_IBSS_PARAMS; | |
1546 | *pos++ = 2; | |
1547 | /* FIX: set ATIM window based on scan results */ | |
1548 | *pos++ = 0; | |
1549 | *pos++ = 0; | |
e039fa4a | 1550 | |
e2ef12d3 RR |
1551 | if (bss->supp_rates_len > 8) { |
1552 | rates = bss->supp_rates_len - 8; | |
1553 | pos = skb_put(skb, 2 + rates); | |
1554 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
1555 | *pos++ = rates; | |
1556 | memcpy(pos, &bss->supp_rates[8], rates); | |
9d139c81 | 1557 | } |
a607268a | 1558 | |
e2ef12d3 RR |
1559 | ifsta->probe_resp = skb; |
1560 | ||
1561 | ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON); | |
1562 | ||
1563 | ||
9d139c81 JB |
1564 | rates = 0; |
1565 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1566 | for (i = 0; i < bss->supp_rates_len; i++) { | |
1567 | int bitrate = (bss->supp_rates[i] & 0x7f) * 5; | |
1568 | for (j = 0; j < sband->n_bitrates; j++) | |
1569 | if (sband->bitrates[j].bitrate == bitrate) | |
1570 | rates |= BIT(j); | |
a607268a | 1571 | } |
9d139c81 JB |
1572 | ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates; |
1573 | ||
b079ada7 | 1574 | ieee80211_sta_def_wmm_params(sdata, bss); |
a607268a | 1575 | |
48c2fc59 | 1576 | ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED; |
a607268a BR |
1577 | mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); |
1578 | ||
4492bea6 EG |
1579 | ieee80211_led_assoc(local, true); |
1580 | ||
507b06d0 DW |
1581 | memset(&wrqu, 0, sizeof(wrqu)); |
1582 | memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN); | |
f698d856 | 1583 | wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL); |
a607268a BR |
1584 | |
1585 | return res; | |
1586 | } | |
1587 | ||
98c8fccf JB |
1588 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
1589 | struct ieee80211_mgmt *mgmt, | |
1590 | size_t len, | |
1591 | struct ieee80211_rx_status *rx_status, | |
1592 | struct ieee802_11_elems *elems, | |
1593 | bool beacon) | |
1594 | { | |
1595 | struct ieee80211_local *local = sdata->local; | |
1596 | int freq; | |
c2b13452 | 1597 | struct ieee80211_bss *bss; |
98c8fccf JB |
1598 | struct sta_info *sta; |
1599 | struct ieee80211_channel *channel; | |
1600 | u64 beacon_timestamp, rx_timestamp; | |
1601 | u64 supp_rates = 0; | |
1602 | enum ieee80211_band band = rx_status->band; | |
98c8fccf JB |
1603 | |
1604 | if (elems->ds_params && elems->ds_params_len == 1) | |
1605 | freq = ieee80211_channel_to_frequency(elems->ds_params[0]); | |
1606 | else | |
1607 | freq = rx_status->freq; | |
1608 | ||
1609 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
1610 | ||
1611 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
1612 | return; | |
1613 | ||
05c914fe | 1614 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && elems->supp_rates && |
98c8fccf JB |
1615 | memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) { |
1616 | supp_rates = ieee80211_sta_get_rates(local, elems, band); | |
1617 | ||
1618 | rcu_read_lock(); | |
1619 | ||
1620 | sta = sta_info_get(local, mgmt->sa); | |
1621 | if (sta) { | |
1622 | u64 prev_rates; | |
1623 | ||
323ce79a | 1624 | prev_rates = sta->sta.supp_rates[band]; |
98c8fccf | 1625 | /* make sure mandatory rates are always added */ |
323ce79a | 1626 | sta->sta.supp_rates[band] = supp_rates | |
96dd22ac | 1627 | ieee80211_mandatory_rates(local, band); |
98c8fccf JB |
1628 | |
1629 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
323ce79a | 1630 | if (sta->sta.supp_rates[band] != prev_rates) |
98c8fccf | 1631 | printk(KERN_DEBUG "%s: updated supp_rates set " |
0c68ae26 | 1632 | "for %pM based on beacon info (0x%llx | " |
98c8fccf | 1633 | "0x%llx -> 0x%llx)\n", |
17741cdc | 1634 | sdata->dev->name, |
0c68ae26 | 1635 | sta->sta.addr, |
98c8fccf JB |
1636 | (unsigned long long) prev_rates, |
1637 | (unsigned long long) supp_rates, | |
323ce79a | 1638 | (unsigned long long) sta->sta.supp_rates[band]); |
98c8fccf JB |
1639 | #endif |
1640 | } else { | |
ab1f5c0b | 1641 | ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates); |
98c8fccf JB |
1642 | } |
1643 | ||
1644 | rcu_read_unlock(); | |
1645 | } | |
1646 | ||
1647 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, | |
1648 | freq, beacon); | |
1649 | if (!bss) | |
1650 | return; | |
1651 | ||
c481ec97 S |
1652 | if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) && |
1653 | (memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0)) { | |
1654 | struct ieee80211_channel_sw_ie *sw_elem = | |
1655 | (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem; | |
1656 | ieee80211_process_chanswitch(sdata, sw_elem, bss); | |
1657 | } | |
1658 | ||
98c8fccf JB |
1659 | /* was just updated in ieee80211_bss_info_update */ |
1660 | beacon_timestamp = bss->timestamp; | |
1661 | ||
30b89b0f JB |
1662 | /* |
1663 | * In STA mode, the remaining parameters should not be overridden | |
1664 | * by beacons because they're not necessarily accurate there. | |
1665 | */ | |
05c914fe | 1666 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC && |
9859b81e | 1667 | bss->last_probe_resp && beacon) { |
3e122be0 | 1668 | ieee80211_rx_bss_put(local, bss); |
30b89b0f JB |
1669 | return; |
1670 | } | |
1671 | ||
9d9bf77d | 1672 | /* check if we need to merge IBSS */ |
05c914fe | 1673 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && beacon && |
65f0e6a3 | 1674 | (!(sdata->u.sta.flags & IEEE80211_STA_BSSID_SET)) && |
fba4a1e6 | 1675 | bss->capability & WLAN_CAPABILITY_IBSS && |
9d9bf77d | 1676 | bss->freq == local->oper_channel->center_freq && |
ae6a44e3 EK |
1677 | elems->ssid_len == sdata->u.sta.ssid_len && |
1678 | memcmp(elems->ssid, sdata->u.sta.ssid, | |
1679 | sdata->u.sta.ssid_len) == 0) { | |
9d9bf77d BR |
1680 | if (rx_status->flag & RX_FLAG_TSFT) { |
1681 | /* in order for correct IBSS merging we need mactime | |
1682 | * | |
1683 | * since mactime is defined as the time the first data | |
1684 | * symbol of the frame hits the PHY, and the timestamp | |
1685 | * of the beacon is defined as "the time that the data | |
1686 | * symbol containing the first bit of the timestamp is | |
1687 | * transmitted to the PHY plus the transmitting STA’s | |
1688 | * delays through its local PHY from the MAC-PHY | |
1689 | * interface to its interface with the WM" | |
1690 | * (802.11 11.1.2) - equals the time this bit arrives at | |
1691 | * the receiver - we have to take into account the | |
1692 | * offset between the two. | |
1693 | * e.g: at 1 MBit that means mactime is 192 usec earlier | |
1694 | * (=24 bytes * 8 usecs/byte) than the beacon timestamp. | |
1695 | */ | |
0fb8ca45 JM |
1696 | int rate; |
1697 | if (rx_status->flag & RX_FLAG_HT) { | |
1698 | rate = 65; /* TODO: HT rates */ | |
1699 | } else { | |
1700 | rate = local->hw.wiphy->bands[band]-> | |
9d9bf77d | 1701 | bitrates[rx_status->rate_idx].bitrate; |
0fb8ca45 | 1702 | } |
9d9bf77d BR |
1703 | rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate); |
1704 | } else if (local && local->ops && local->ops->get_tsf) | |
1705 | /* second best option: get current TSF */ | |
1706 | rx_timestamp = local->ops->get_tsf(local_to_hw(local)); | |
1707 | else | |
1708 | /* can't merge without knowing the TSF */ | |
1709 | rx_timestamp = -1LLU; | |
1710 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0c68ae26 JB |
1711 | printk(KERN_DEBUG "RX beacon SA=%pM BSSID=" |
1712 | "%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n", | |
1713 | mgmt->sa, mgmt->bssid, | |
9d9bf77d BR |
1714 | (unsigned long long)rx_timestamp, |
1715 | (unsigned long long)beacon_timestamp, | |
1716 | (unsigned long long)(rx_timestamp - beacon_timestamp), | |
1717 | jiffies); | |
1718 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
1719 | if (beacon_timestamp > rx_timestamp) { | |
576fdeae | 1720 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
f4ea83dd | 1721 | printk(KERN_DEBUG "%s: beacon TSF higher than " |
0c68ae26 JB |
1722 | "local TSF - IBSS merge with BSSID %pM\n", |
1723 | sdata->dev->name, mgmt->bssid); | |
fba4a1e6 | 1724 | #endif |
f698d856 | 1725 | ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss); |
ab1f5c0b | 1726 | ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates); |
9d9bf77d BR |
1727 | } |
1728 | } | |
1729 | ||
3e122be0 | 1730 | ieee80211_rx_bss_put(local, bss); |
f0706e82 JB |
1731 | } |
1732 | ||
1733 | ||
f698d856 | 1734 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1735 | struct ieee80211_mgmt *mgmt, |
1736 | size_t len, | |
1737 | struct ieee80211_rx_status *rx_status) | |
1738 | { | |
ae6a44e3 EK |
1739 | size_t baselen; |
1740 | struct ieee802_11_elems elems; | |
9859b81e | 1741 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
ae6a44e3 | 1742 | |
8e7cdbb6 TW |
1743 | if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN)) |
1744 | return; /* ignore ProbeResp to foreign address */ | |
1745 | ||
ae6a44e3 EK |
1746 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
1747 | if (baselen > len) | |
1748 | return; | |
1749 | ||
1750 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
1751 | &elems); | |
1752 | ||
98c8fccf | 1753 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false); |
9859b81e RR |
1754 | |
1755 | /* direct probe may be part of the association flow */ | |
1756 | if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE, | |
1757 | &ifsta->request)) { | |
1758 | printk(KERN_DEBUG "%s direct probe responded\n", | |
1759 | sdata->dev->name); | |
1760 | ieee80211_authenticate(sdata, ifsta); | |
1761 | } | |
f0706e82 JB |
1762 | } |
1763 | ||
1764 | ||
f698d856 | 1765 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1766 | struct ieee80211_mgmt *mgmt, |
1767 | size_t len, | |
1768 | struct ieee80211_rx_status *rx_status) | |
1769 | { | |
f0706e82 | 1770 | struct ieee80211_if_sta *ifsta; |
f0706e82 JB |
1771 | size_t baselen; |
1772 | struct ieee802_11_elems elems; | |
f698d856 | 1773 | struct ieee80211_local *local = sdata->local; |
471b3efd | 1774 | u32 changed = 0; |
a97b77b9 | 1775 | bool erp_valid, directed_tim, is_mc = false; |
7a5158ef | 1776 | u8 erp_value = 0; |
f0706e82 | 1777 | |
ae6a44e3 EK |
1778 | /* Process beacon from the current BSS */ |
1779 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
1780 | if (baselen > len) | |
1781 | return; | |
1782 | ||
1783 | ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems); | |
1784 | ||
98c8fccf | 1785 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true); |
f0706e82 | 1786 | |
05c914fe | 1787 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
f0706e82 JB |
1788 | return; |
1789 | ifsta = &sdata->u.sta; | |
1790 | ||
d6f2da5b | 1791 | if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) || |
f0706e82 JB |
1792 | memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) |
1793 | return; | |
1794 | ||
c481ec97 S |
1795 | if (rx_status->freq != local->hw.conf.channel->center_freq) |
1796 | return; | |
1797 | ||
fe3fa827 JB |
1798 | ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param, |
1799 | elems.wmm_param_len); | |
1800 | ||
4be8c387 JB |
1801 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK && |
1802 | local->hw.conf.flags & IEEE80211_CONF_PS) { | |
a97b77b9 VN |
1803 | directed_tim = check_tim(&elems, ifsta->aid, &is_mc); |
1804 | ||
1805 | if (directed_tim || is_mc) { | |
4be8c387 JB |
1806 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; |
1807 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
1808 | ieee80211_send_nullfunc(local, sdata, 0); | |
a97b77b9 VN |
1809 | } |
1810 | } | |
7a5158ef JB |
1811 | |
1812 | if (elems.erp_info && elems.erp_info_len >= 1) { | |
1813 | erp_valid = true; | |
1814 | erp_value = elems.erp_info[0]; | |
1815 | } else { | |
1816 | erp_valid = false; | |
50c4afb9 | 1817 | } |
7a5158ef JB |
1818 | changed |= ieee80211_handle_bss_capability(sdata, |
1819 | le16_to_cpu(mgmt->u.beacon.capab_info), | |
1820 | erp_valid, erp_value); | |
f0706e82 | 1821 | |
d3c990fb | 1822 | |
ae5eb026 JB |
1823 | if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param) { |
1824 | struct sta_info *sta; | |
1825 | struct ieee80211_supported_band *sband; | |
1826 | u16 ap_ht_cap_flags; | |
1827 | ||
1828 | rcu_read_lock(); | |
1829 | ||
1830 | sta = sta_info_get(local, ifsta->bssid); | |
1831 | if (!sta) { | |
1832 | rcu_read_unlock(); | |
1833 | return; | |
1834 | } | |
1835 | ||
1836 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1837 | ||
1838 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, | |
1839 | elems.ht_cap_elem, &sta->sta.ht_cap); | |
1840 | ||
1841 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
1842 | ||
1843 | rcu_read_unlock(); | |
1844 | ||
1845 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, | |
1846 | ap_ht_cap_flags); | |
d3c990fb RR |
1847 | } |
1848 | ||
3f2355cb LR |
1849 | if (elems.country_elem) { |
1850 | /* Note we are only reviewing this on beacons | |
1851 | * for the BSSID we are associated to */ | |
1852 | regulatory_hint_11d(local->hw.wiphy, | |
1853 | elems.country_elem, elems.country_elem_len); | |
a8302de9 VT |
1854 | |
1855 | /* TODO: IBSS also needs this */ | |
1856 | if (elems.pwr_constr_elem) | |
1857 | ieee80211_handle_pwr_constr(sdata, | |
1858 | le16_to_cpu(mgmt->u.probe_resp.capab_info), | |
1859 | elems.pwr_constr_elem, | |
1860 | elems.pwr_constr_elem_len); | |
3f2355cb LR |
1861 | } |
1862 | ||
471b3efd | 1863 | ieee80211_bss_info_change_notify(sdata, changed); |
f0706e82 JB |
1864 | } |
1865 | ||
1866 | ||
f698d856 | 1867 | static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1868 | struct ieee80211_if_sta *ifsta, |
1869 | struct ieee80211_mgmt *mgmt, | |
504a71e4 | 1870 | size_t len) |
f0706e82 | 1871 | { |
f698d856 | 1872 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1873 | int tx_last_beacon; |
1874 | struct sk_buff *skb; | |
1875 | struct ieee80211_mgmt *resp; | |
1876 | u8 *pos, *end; | |
1877 | ||
05c914fe | 1878 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC || |
48c2fc59 | 1879 | ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED || |
f0706e82 JB |
1880 | len < 24 + 2 || !ifsta->probe_resp) |
1881 | return; | |
1882 | ||
1883 | if (local->ops->tx_last_beacon) | |
1884 | tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local)); | |
1885 | else | |
1886 | tx_last_beacon = 1; | |
1887 | ||
1888 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0c68ae26 JB |
1889 | printk(KERN_DEBUG "%s: RX ProbeReq SA=%pM DA=%pM BSSID=%pM" |
1890 | " (tx_last_beacon=%d)\n", | |
1891 | sdata->dev->name, mgmt->sa, mgmt->da, | |
1892 | mgmt->bssid, tx_last_beacon); | |
f0706e82 JB |
1893 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
1894 | ||
1895 | if (!tx_last_beacon) | |
1896 | return; | |
1897 | ||
1898 | if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 && | |
1899 | memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0) | |
1900 | return; | |
1901 | ||
1902 | end = ((u8 *) mgmt) + len; | |
1903 | pos = mgmt->u.probe_req.variable; | |
1904 | if (pos[0] != WLAN_EID_SSID || | |
1905 | pos + 2 + pos[1] > end) { | |
f4ea83dd JB |
1906 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
1907 | printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq " | |
0c68ae26 JB |
1908 | "from %pM\n", |
1909 | sdata->dev->name, mgmt->sa); | |
f4ea83dd | 1910 | #endif |
f0706e82 JB |
1911 | return; |
1912 | } | |
1913 | if (pos[1] != 0 && | |
1914 | (pos[1] != ifsta->ssid_len || | |
1915 | memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) { | |
1916 | /* Ignore ProbeReq for foreign SSID */ | |
1917 | return; | |
1918 | } | |
1919 | ||
1920 | /* Reply with ProbeResp */ | |
0ec0b7ac | 1921 | skb = skb_copy(ifsta->probe_resp, GFP_KERNEL); |
f0706e82 JB |
1922 | if (!skb) |
1923 | return; | |
1924 | ||
1925 | resp = (struct ieee80211_mgmt *) skb->data; | |
1926 | memcpy(resp->da, mgmt->sa, ETH_ALEN); | |
1927 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0c68ae26 JB |
1928 | printk(KERN_DEBUG "%s: Sending ProbeResp to %pM\n", |
1929 | sdata->dev->name, resp->da); | |
f0706e82 | 1930 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
e50db65c | 1931 | ieee80211_tx_skb(sdata, skb, 0); |
f0706e82 JB |
1932 | } |
1933 | ||
f698d856 | 1934 | void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, |
f0706e82 JB |
1935 | struct ieee80211_rx_status *rx_status) |
1936 | { | |
f698d856 | 1937 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1938 | struct ieee80211_if_sta *ifsta; |
1939 | struct ieee80211_mgmt *mgmt; | |
1940 | u16 fc; | |
1941 | ||
1942 | if (skb->len < 24) | |
1943 | goto fail; | |
1944 | ||
f0706e82 JB |
1945 | ifsta = &sdata->u.sta; |
1946 | ||
1947 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1948 | fc = le16_to_cpu(mgmt->frame_control); | |
1949 | ||
1950 | switch (fc & IEEE80211_FCTL_STYPE) { | |
1951 | case IEEE80211_STYPE_PROBE_REQ: | |
1952 | case IEEE80211_STYPE_PROBE_RESP: | |
1953 | case IEEE80211_STYPE_BEACON: | |
1954 | memcpy(skb->cb, rx_status, sizeof(*rx_status)); | |
1955 | case IEEE80211_STYPE_AUTH: | |
1956 | case IEEE80211_STYPE_ASSOC_RESP: | |
1957 | case IEEE80211_STYPE_REASSOC_RESP: | |
1958 | case IEEE80211_STYPE_DEAUTH: | |
1959 | case IEEE80211_STYPE_DISASSOC: | |
1960 | skb_queue_tail(&ifsta->skb_queue, skb); | |
1961 | queue_work(local->hw.workqueue, &ifsta->work); | |
1962 | return; | |
f0706e82 JB |
1963 | } |
1964 | ||
1965 | fail: | |
1966 | kfree_skb(skb); | |
1967 | } | |
1968 | ||
f698d856 | 1969 | static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1970 | struct sk_buff *skb) |
1971 | { | |
1972 | struct ieee80211_rx_status *rx_status; | |
f0706e82 JB |
1973 | struct ieee80211_if_sta *ifsta; |
1974 | struct ieee80211_mgmt *mgmt; | |
1975 | u16 fc; | |
1976 | ||
f0706e82 JB |
1977 | ifsta = &sdata->u.sta; |
1978 | ||
1979 | rx_status = (struct ieee80211_rx_status *) skb->cb; | |
1980 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1981 | fc = le16_to_cpu(mgmt->frame_control); | |
1982 | ||
1983 | switch (fc & IEEE80211_FCTL_STYPE) { | |
1984 | case IEEE80211_STYPE_PROBE_REQ: | |
504a71e4 | 1985 | ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len); |
f0706e82 JB |
1986 | break; |
1987 | case IEEE80211_STYPE_PROBE_RESP: | |
f698d856 | 1988 | ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status); |
f0706e82 JB |
1989 | break; |
1990 | case IEEE80211_STYPE_BEACON: | |
f698d856 | 1991 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); |
f0706e82 JB |
1992 | break; |
1993 | case IEEE80211_STYPE_AUTH: | |
f698d856 | 1994 | ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len); |
f0706e82 JB |
1995 | break; |
1996 | case IEEE80211_STYPE_ASSOC_RESP: | |
471b3efd | 1997 | ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0); |
f0706e82 JB |
1998 | break; |
1999 | case IEEE80211_STYPE_REASSOC_RESP: | |
471b3efd | 2000 | ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1); |
f0706e82 JB |
2001 | break; |
2002 | case IEEE80211_STYPE_DEAUTH: | |
f698d856 | 2003 | ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len); |
f0706e82 JB |
2004 | break; |
2005 | case IEEE80211_STYPE_DISASSOC: | |
f698d856 | 2006 | ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len); |
f0706e82 JB |
2007 | break; |
2008 | } | |
2009 | ||
2010 | kfree_skb(skb); | |
2011 | } | |
2012 | ||
2013 | ||
f698d856 | 2014 | static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 2015 | { |
f698d856 | 2016 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
2017 | int active = 0; |
2018 | struct sta_info *sta; | |
2019 | ||
d0709a65 JB |
2020 | rcu_read_lock(); |
2021 | ||
2022 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
2023 | if (sta->sdata == sdata && | |
f0706e82 JB |
2024 | time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL, |
2025 | jiffies)) { | |
2026 | active++; | |
2027 | break; | |
2028 | } | |
2029 | } | |
d0709a65 JB |
2030 | |
2031 | rcu_read_unlock(); | |
f0706e82 JB |
2032 | |
2033 | return active; | |
2034 | } | |
2035 | ||
2036 | ||
f698d856 | 2037 | static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2038 | struct ieee80211_if_sta *ifsta) |
2039 | { | |
2040 | mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); | |
2041 | ||
f698d856 JBG |
2042 | ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT); |
2043 | if (ieee80211_sta_active_ibss(sdata)) | |
f0706e82 JB |
2044 | return; |
2045 | ||
137f9f46 AF |
2046 | if ((sdata->u.sta.flags & IEEE80211_STA_BSSID_SET) && |
2047 | (!(sdata->u.sta.flags & IEEE80211_STA_AUTO_CHANNEL_SEL))) | |
2048 | return; | |
2049 | ||
f0706e82 | 2050 | printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other " |
f698d856 | 2051 | "IBSS networks with same SSID (merge)\n", sdata->dev->name); |
c2b13452 | 2052 | ieee80211_request_scan(sdata, ifsta->ssid, ifsta->ssid_len); |
f0706e82 JB |
2053 | } |
2054 | ||
2055 | ||
9c6bd790 | 2056 | static void ieee80211_sta_timer(unsigned long data) |
f0706e82 | 2057 | { |
60f8b39c JB |
2058 | struct ieee80211_sub_if_data *sdata = |
2059 | (struct ieee80211_sub_if_data *) data; | |
2060 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
2061 | struct ieee80211_local *local = sdata->local; | |
f0706e82 | 2062 | |
60f8b39c JB |
2063 | set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); |
2064 | queue_work(local->hw.workqueue, &ifsta->work); | |
f0706e82 JB |
2065 | } |
2066 | ||
f698d856 | 2067 | static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2068 | struct ieee80211_if_sta *ifsta) |
2069 | { | |
f698d856 | 2070 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
2071 | |
2072 | if (local->ops->reset_tsf) { | |
2073 | /* Reset own TSF to allow time synchronization work. */ | |
2074 | local->ops->reset_tsf(local_to_hw(local)); | |
2075 | } | |
2076 | ||
2077 | ifsta->wmm_last_param_set = -1; /* allow any WMM update */ | |
2078 | ||
2079 | ||
2080 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
2081 | ifsta->auth_alg = WLAN_AUTH_OPEN; | |
2082 | else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
2083 | ifsta->auth_alg = WLAN_AUTH_SHARED_KEY; | |
2084 | else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
2085 | ifsta->auth_alg = WLAN_AUTH_LEAP; | |
2086 | else | |
2087 | ifsta->auth_alg = WLAN_AUTH_OPEN; | |
f0706e82 | 2088 | ifsta->auth_transaction = -1; |
d6f2da5b | 2089 | ifsta->flags &= ~IEEE80211_STA_ASSOCIATED; |
6042a3e3 | 2090 | ifsta->assoc_scan_tries = 0; |
9859b81e | 2091 | ifsta->direct_probe_tries = 0; |
6042a3e3 RR |
2092 | ifsta->auth_tries = 0; |
2093 | ifsta->assoc_tries = 0; | |
24e64622 | 2094 | netif_tx_stop_all_queues(sdata->dev); |
f698d856 | 2095 | netif_carrier_off(sdata->dev); |
f0706e82 JB |
2096 | } |
2097 | ||
2098 | ||
f0706e82 JB |
2099 | static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta, |
2100 | const char *ssid, int ssid_len) | |
2101 | { | |
2102 | int tmp, hidden_ssid; | |
2103 | ||
48225709 MW |
2104 | if (ssid_len == ifsta->ssid_len && |
2105 | !memcmp(ifsta->ssid, ssid, ssid_len)) | |
f0706e82 JB |
2106 | return 1; |
2107 | ||
d6f2da5b | 2108 | if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) |
f0706e82 JB |
2109 | return 0; |
2110 | ||
2111 | hidden_ssid = 1; | |
2112 | tmp = ssid_len; | |
2113 | while (tmp--) { | |
2114 | if (ssid[tmp] != '\0') { | |
2115 | hidden_ssid = 0; | |
2116 | break; | |
2117 | } | |
2118 | } | |
2119 | ||
cb3da8cc | 2120 | if (hidden_ssid && (ifsta->ssid_len == ssid_len || ssid_len == 0)) |
f0706e82 JB |
2121 | return 1; |
2122 | ||
2123 | if (ssid_len == 1 && ssid[0] == ' ') | |
2124 | return 1; | |
2125 | ||
2126 | return 0; | |
2127 | } | |
2128 | ||
f698d856 | 2129 | static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2130 | struct ieee80211_if_sta *ifsta) |
2131 | { | |
f698d856 | 2132 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 2133 | struct ieee80211_bss *bss; |
8318d78a | 2134 | struct ieee80211_supported_band *sband; |
f0706e82 JB |
2135 | u8 bssid[ETH_ALEN], *pos; |
2136 | int i; | |
167ad6f7 | 2137 | int ret; |
f0706e82 JB |
2138 | |
2139 | #if 0 | |
2140 | /* Easier testing, use fixed BSSID. */ | |
2141 | memset(bssid, 0xfe, ETH_ALEN); | |
2142 | #else | |
2143 | /* Generate random, not broadcast, locally administered BSSID. Mix in | |
2144 | * own MAC address to make sure that devices that do not have proper | |
2145 | * random number generator get different BSSID. */ | |
2146 | get_random_bytes(bssid, ETH_ALEN); | |
2147 | for (i = 0; i < ETH_ALEN; i++) | |
f698d856 | 2148 | bssid[i] ^= sdata->dev->dev_addr[i]; |
f0706e82 JB |
2149 | bssid[0] &= ~0x01; |
2150 | bssid[0] |= 0x02; | |
2151 | #endif | |
2152 | ||
0c68ae26 JB |
2153 | printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %pM\n", |
2154 | sdata->dev->name, bssid); | |
f0706e82 | 2155 | |
98c8fccf | 2156 | bss = ieee80211_rx_bss_add(local, bssid, |
8318d78a | 2157 | local->hw.conf.channel->center_freq, |
cffdd30d | 2158 | sdata->u.sta.ssid, sdata->u.sta.ssid_len); |
f0706e82 JB |
2159 | if (!bss) |
2160 | return -ENOMEM; | |
2161 | ||
8318d78a JB |
2162 | bss->band = local->hw.conf.channel->band; |
2163 | sband = local->hw.wiphy->bands[bss->band]; | |
f0706e82 JB |
2164 | |
2165 | if (local->hw.conf.beacon_int == 0) | |
dc0ae30c | 2166 | local->hw.conf.beacon_int = 100; |
f0706e82 | 2167 | bss->beacon_int = local->hw.conf.beacon_int; |
f0706e82 JB |
2168 | bss->last_update = jiffies; |
2169 | bss->capability = WLAN_CAPABILITY_IBSS; | |
988c0f72 JB |
2170 | |
2171 | if (sdata->default_key) | |
f0706e82 | 2172 | bss->capability |= WLAN_CAPABILITY_PRIVACY; |
988c0f72 | 2173 | else |
f0706e82 | 2174 | sdata->drop_unencrypted = 0; |
988c0f72 | 2175 | |
8318d78a | 2176 | bss->supp_rates_len = sband->n_bitrates; |
f0706e82 | 2177 | pos = bss->supp_rates; |
8318d78a JB |
2178 | for (i = 0; i < sband->n_bitrates; i++) { |
2179 | int rate = sband->bitrates[i].bitrate; | |
f0706e82 JB |
2180 | *pos++ = (u8) (rate / 5); |
2181 | } | |
2182 | ||
f698d856 | 2183 | ret = ieee80211_sta_join_ibss(sdata, ifsta, bss); |
3e122be0 | 2184 | ieee80211_rx_bss_put(local, bss); |
167ad6f7 | 2185 | return ret; |
f0706e82 JB |
2186 | } |
2187 | ||
2188 | ||
f698d856 | 2189 | static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2190 | struct ieee80211_if_sta *ifsta) |
2191 | { | |
f698d856 | 2192 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 2193 | struct ieee80211_bss *bss; |
f0706e82 JB |
2194 | int found = 0; |
2195 | u8 bssid[ETH_ALEN]; | |
2196 | int active_ibss; | |
2197 | ||
2198 | if (ifsta->ssid_len == 0) | |
2199 | return -EINVAL; | |
2200 | ||
f698d856 | 2201 | active_ibss = ieee80211_sta_active_ibss(sdata); |
f0706e82 JB |
2202 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
2203 | printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n", | |
f698d856 | 2204 | sdata->dev->name, active_ibss); |
f0706e82 | 2205 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
c2b13452 JB |
2206 | spin_lock_bh(&local->bss_lock); |
2207 | list_for_each_entry(bss, &local->bss_list, list) { | |
f0706e82 JB |
2208 | if (ifsta->ssid_len != bss->ssid_len || |
2209 | memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0 | |
2210 | || !(bss->capability & WLAN_CAPABILITY_IBSS)) | |
2211 | continue; | |
2212 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0c68ae26 | 2213 | printk(KERN_DEBUG " bssid=%pM found\n", bss->bssid); |
f0706e82 JB |
2214 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
2215 | memcpy(bssid, bss->bssid, ETH_ALEN); | |
2216 | found = 1; | |
2217 | if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0) | |
2218 | break; | |
2219 | } | |
c2b13452 | 2220 | spin_unlock_bh(&local->bss_lock); |
f0706e82 JB |
2221 | |
2222 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
6e43829b | 2223 | if (found) |
0c68ae26 JB |
2224 | printk(KERN_DEBUG " sta_find_ibss: selected %pM current " |
2225 | "%pM\n", bssid, ifsta->bssid); | |
f0706e82 | 2226 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
80693ceb DD |
2227 | |
2228 | if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) { | |
167ad6f7 | 2229 | int ret; |
80693ceb DD |
2230 | int search_freq; |
2231 | ||
2232 | if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) | |
2233 | search_freq = bss->freq; | |
2234 | else | |
2235 | search_freq = local->hw.conf.channel->center_freq; | |
2236 | ||
f698d856 | 2237 | bss = ieee80211_rx_bss_get(local, bssid, search_freq, |
80693ceb DD |
2238 | ifsta->ssid, ifsta->ssid_len); |
2239 | if (!bss) | |
2240 | goto dont_join; | |
2241 | ||
0c68ae26 | 2242 | printk(KERN_DEBUG "%s: Selected IBSS BSSID %pM" |
f0706e82 | 2243 | " based on configured SSID\n", |
0c68ae26 | 2244 | sdata->dev->name, bssid); |
f698d856 | 2245 | ret = ieee80211_sta_join_ibss(sdata, ifsta, bss); |
3e122be0 | 2246 | ieee80211_rx_bss_put(local, bss); |
167ad6f7 | 2247 | return ret; |
f0706e82 | 2248 | } |
80693ceb DD |
2249 | |
2250 | dont_join: | |
f0706e82 JB |
2251 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
2252 | printk(KERN_DEBUG " did not try to join ibss\n"); | |
2253 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
2254 | ||
2255 | /* Selected IBSS not found in current scan results - try to scan */ | |
48c2fc59 | 2256 | if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED && |
f698d856 | 2257 | !ieee80211_sta_active_ibss(sdata)) { |
f0706e82 JB |
2258 | mod_timer(&ifsta->timer, jiffies + |
2259 | IEEE80211_IBSS_MERGE_INTERVAL); | |
2260 | } else if (time_after(jiffies, local->last_scan_completed + | |
2261 | IEEE80211_SCAN_INTERVAL)) { | |
2262 | printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to " | |
f698d856 | 2263 | "join\n", sdata->dev->name); |
c2b13452 | 2264 | return ieee80211_request_scan(sdata, ifsta->ssid, |
f0706e82 | 2265 | ifsta->ssid_len); |
48c2fc59 | 2266 | } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) { |
f0706e82 JB |
2267 | int interval = IEEE80211_SCAN_INTERVAL; |
2268 | ||
2269 | if (time_after(jiffies, ifsta->ibss_join_req + | |
2270 | IEEE80211_IBSS_JOIN_TIMEOUT)) { | |
d6f2da5b | 2271 | if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) && |
8318d78a JB |
2272 | (!(local->oper_channel->flags & |
2273 | IEEE80211_CHAN_NO_IBSS))) | |
f698d856 | 2274 | return ieee80211_sta_create_ibss(sdata, ifsta); |
d6f2da5b | 2275 | if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) { |
8318d78a | 2276 | printk(KERN_DEBUG "%s: IBSS not allowed on" |
f698d856 | 2277 | " %d MHz\n", sdata->dev->name, |
8318d78a | 2278 | local->hw.conf.channel->center_freq); |
f0706e82 JB |
2279 | } |
2280 | ||
2281 | /* No IBSS found - decrease scan interval and continue | |
2282 | * scanning. */ | |
2283 | interval = IEEE80211_SCAN_INTERVAL_SLOW; | |
2284 | } | |
2285 | ||
48c2fc59 | 2286 | ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH; |
f0706e82 JB |
2287 | mod_timer(&ifsta->timer, jiffies + interval); |
2288 | return 0; | |
2289 | } | |
2290 | ||
2291 | return 0; | |
2292 | } | |
2293 | ||
2294 | ||
9c6bd790 JB |
2295 | static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata, |
2296 | struct ieee80211_if_sta *ifsta) | |
f0706e82 | 2297 | { |
9c6bd790 | 2298 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 2299 | struct ieee80211_bss *bss, *selected = NULL; |
9c6bd790 | 2300 | int top_rssi = 0, freq; |
f0706e82 | 2301 | |
c2b13452 | 2302 | spin_lock_bh(&local->bss_lock); |
9c6bd790 | 2303 | freq = local->oper_channel->center_freq; |
c2b13452 | 2304 | list_for_each_entry(bss, &local->bss_list, list) { |
9c6bd790 JB |
2305 | if (!(bss->capability & WLAN_CAPABILITY_ESS)) |
2306 | continue; | |
f0706e82 | 2307 | |
9c6bd790 JB |
2308 | if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL | |
2309 | IEEE80211_STA_AUTO_BSSID_SEL | | |
2310 | IEEE80211_STA_AUTO_CHANNEL_SEL)) && | |
2311 | (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^ | |
2312 | !!sdata->default_key)) | |
2313 | continue; | |
f0706e82 | 2314 | |
9c6bd790 JB |
2315 | if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) && |
2316 | bss->freq != freq) | |
2317 | continue; | |
9d139c81 | 2318 | |
9c6bd790 JB |
2319 | if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) && |
2320 | memcmp(bss->bssid, ifsta->bssid, ETH_ALEN)) | |
2321 | continue; | |
f0706e82 | 2322 | |
9c6bd790 JB |
2323 | if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) && |
2324 | !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len)) | |
2325 | continue; | |
9d139c81 | 2326 | |
9c6bd790 JB |
2327 | if (!selected || top_rssi < bss->signal) { |
2328 | selected = bss; | |
2329 | top_rssi = bss->signal; | |
2330 | } | |
f0706e82 | 2331 | } |
9c6bd790 JB |
2332 | if (selected) |
2333 | atomic_inc(&selected->users); | |
c2b13452 | 2334 | spin_unlock_bh(&local->bss_lock); |
9d139c81 | 2335 | |
9c6bd790 JB |
2336 | if (selected) { |
2337 | ieee80211_set_freq(sdata, selected->freq); | |
2338 | if (!(ifsta->flags & IEEE80211_STA_SSID_SET)) | |
2339 | ieee80211_sta_set_ssid(sdata, selected->ssid, | |
2340 | selected->ssid_len); | |
2341 | ieee80211_sta_set_bssid(sdata, selected->bssid); | |
2342 | ieee80211_sta_def_wmm_params(sdata, selected); | |
fdfacf0a JM |
2343 | if (sdata->u.sta.mfp == IEEE80211_MFP_REQUIRED) |
2344 | sdata->u.sta.flags |= IEEE80211_STA_MFP_ENABLED; | |
2345 | else | |
2346 | sdata->u.sta.flags &= ~IEEE80211_STA_MFP_ENABLED; | |
f0706e82 | 2347 | |
9c6bd790 JB |
2348 | /* Send out direct probe if no probe resp was received or |
2349 | * the one we have is outdated | |
2350 | */ | |
2351 | if (!selected->last_probe_resp || | |
2352 | time_after(jiffies, selected->last_probe_resp | |
2353 | + IEEE80211_SCAN_RESULT_EXPIRE)) | |
2354 | ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE; | |
2355 | else | |
2356 | ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE; | |
f0706e82 | 2357 | |
9c6bd790 JB |
2358 | ieee80211_rx_bss_put(local, selected); |
2359 | ieee80211_sta_reset_auth(sdata, ifsta); | |
2360 | return 0; | |
2361 | } else { | |
2362 | if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) { | |
2363 | ifsta->assoc_scan_tries++; | |
2364 | if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) | |
c2b13452 | 2365 | ieee80211_start_scan(sdata, NULL, 0); |
9c6bd790 | 2366 | else |
c2b13452 | 2367 | ieee80211_start_scan(sdata, ifsta->ssid, |
9c6bd790 JB |
2368 | ifsta->ssid_len); |
2369 | ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE; | |
2370 | set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); | |
2371 | } else | |
2372 | ifsta->state = IEEE80211_STA_MLME_DISABLED; | |
2373 | } | |
2374 | return -1; | |
2375 | } | |
2376 | ||
2377 | ||
2378 | static void ieee80211_sta_work(struct work_struct *work) | |
2379 | { | |
2380 | struct ieee80211_sub_if_data *sdata = | |
2381 | container_of(work, struct ieee80211_sub_if_data, u.sta.work); | |
2382 | struct ieee80211_local *local = sdata->local; | |
2383 | struct ieee80211_if_sta *ifsta; | |
2384 | struct sk_buff *skb; | |
2385 | ||
2386 | if (!netif_running(sdata->dev)) | |
2387 | return; | |
2388 | ||
c2b13452 | 2389 | if (local->sw_scanning || local->hw_scanning) |
9c6bd790 JB |
2390 | return; |
2391 | ||
05c914fe JB |
2392 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION && |
2393 | sdata->vif.type != NL80211_IFTYPE_ADHOC)) | |
9c6bd790 | 2394 | return; |
f0706e82 JB |
2395 | ifsta = &sdata->u.sta; |
2396 | ||
9c6bd790 JB |
2397 | while ((skb = skb_dequeue(&ifsta->skb_queue))) |
2398 | ieee80211_sta_rx_queued_mgmt(sdata, skb); | |
2399 | ||
2400 | if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE && | |
2401 | ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE && | |
2402 | ifsta->state != IEEE80211_STA_MLME_ASSOCIATE && | |
2403 | test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) { | |
c2b13452 JB |
2404 | ieee80211_start_scan(sdata, ifsta->scan_ssid, |
2405 | ifsta->scan_ssid_len); | |
9c6bd790 | 2406 | return; |
f0706e82 JB |
2407 | } |
2408 | ||
9c6bd790 JB |
2409 | if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) { |
2410 | if (ieee80211_sta_config_auth(sdata, ifsta)) | |
2411 | return; | |
2412 | clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); | |
2413 | } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request)) | |
2414 | return; | |
d6f2da5b | 2415 | |
9c6bd790 JB |
2416 | switch (ifsta->state) { |
2417 | case IEEE80211_STA_MLME_DISABLED: | |
2418 | break; | |
2419 | case IEEE80211_STA_MLME_DIRECT_PROBE: | |
2420 | ieee80211_direct_probe(sdata, ifsta); | |
2421 | break; | |
2422 | case IEEE80211_STA_MLME_AUTHENTICATE: | |
2423 | ieee80211_authenticate(sdata, ifsta); | |
2424 | break; | |
2425 | case IEEE80211_STA_MLME_ASSOCIATE: | |
2426 | ieee80211_associate(sdata, ifsta); | |
2427 | break; | |
2428 | case IEEE80211_STA_MLME_ASSOCIATED: | |
2429 | ieee80211_associated(sdata, ifsta); | |
2430 | break; | |
2431 | case IEEE80211_STA_MLME_IBSS_SEARCH: | |
2432 | ieee80211_sta_find_ibss(sdata, ifsta); | |
2433 | break; | |
2434 | case IEEE80211_STA_MLME_IBSS_JOINED: | |
2435 | ieee80211_sta_merge_ibss(sdata, ifsta); | |
2436 | break; | |
2437 | default: | |
2438 | WARN_ON(1); | |
2439 | break; | |
2440 | } | |
2441 | ||
2442 | if (ieee80211_privacy_mismatch(sdata, ifsta)) { | |
2443 | printk(KERN_DEBUG "%s: privacy configuration mismatch and " | |
2444 | "mixed-cell disabled - disassociate\n", sdata->dev->name); | |
2445 | ||
2446 | ieee80211_set_disassoc(sdata, ifsta, false, true, | |
2447 | WLAN_REASON_UNSPECIFIED); | |
2448 | } | |
f0706e82 JB |
2449 | } |
2450 | ||
9c6bd790 JB |
2451 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
2452 | { | |
05c914fe | 2453 | if (sdata->vif.type == NL80211_IFTYPE_STATION) |
9c6bd790 JB |
2454 | queue_work(sdata->local->hw.workqueue, |
2455 | &sdata->u.sta.work); | |
2456 | } | |
f0706e82 | 2457 | |
9c6bd790 JB |
2458 | /* interface setup */ |
2459 | void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) | |
f0706e82 | 2460 | { |
9c6bd790 | 2461 | struct ieee80211_if_sta *ifsta; |
988c0f72 | 2462 | |
9c6bd790 JB |
2463 | ifsta = &sdata->u.sta; |
2464 | INIT_WORK(&ifsta->work, ieee80211_sta_work); | |
c481ec97 | 2465 | INIT_WORK(&ifsta->chswitch_work, ieee80211_chswitch_work); |
9c6bd790 | 2466 | setup_timer(&ifsta->timer, ieee80211_sta_timer, |
c481ec97 S |
2467 | (unsigned long) sdata); |
2468 | setup_timer(&ifsta->chswitch_timer, ieee80211_chswitch_timer, | |
9c6bd790 JB |
2469 | (unsigned long) sdata); |
2470 | skb_queue_head_init(&ifsta->skb_queue); | |
2471 | ||
2472 | ifsta->capab = WLAN_CAPABILITY_ESS; | |
2473 | ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN | | |
2474 | IEEE80211_AUTH_ALG_SHARED_KEY; | |
2475 | ifsta->flags |= IEEE80211_STA_CREATE_IBSS | | |
2476 | IEEE80211_STA_AUTO_BSSID_SEL | | |
2477 | IEEE80211_STA_AUTO_CHANNEL_SEL; | |
2478 | if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4) | |
2479 | ifsta->flags |= IEEE80211_STA_WMM_ENABLED; | |
f0706e82 JB |
2480 | } |
2481 | ||
9c6bd790 JB |
2482 | /* |
2483 | * Add a new IBSS station, will also be called by the RX code when, | |
2484 | * in IBSS mode, receiving a frame from a yet-unknown station, hence | |
2485 | * must be callable in atomic context. | |
2486 | */ | |
f698d856 | 2487 | struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, |
ab1f5c0b | 2488 | u8 *bssid,u8 *addr, u64 supp_rates) |
f0706e82 | 2489 | { |
f698d856 | 2490 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 2491 | struct sta_info *sta; |
87291c02 | 2492 | int band = local->hw.conf.channel->band; |
f0706e82 JB |
2493 | |
2494 | /* TODO: Could consider removing the least recently used entry and | |
2495 | * allow new one to be added. */ | |
2496 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { | |
2497 | if (net_ratelimit()) { | |
2498 | printk(KERN_DEBUG "%s: No room for a new IBSS STA " | |
0c68ae26 | 2499 | "entry %pM\n", sdata->dev->name, addr); |
f0706e82 JB |
2500 | } |
2501 | return NULL; | |
2502 | } | |
2503 | ||
1e188637 | 2504 | if (compare_ether_addr(bssid, sdata->u.sta.bssid)) |
87291c02 VK |
2505 | return NULL; |
2506 | ||
f4ea83dd | 2507 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
0c68ae26 JB |
2508 | printk(KERN_DEBUG "%s: Adding new IBSS station %pM (dev=%s)\n", |
2509 | wiphy_name(local->hw.wiphy), addr, sdata->dev->name); | |
f4ea83dd | 2510 | #endif |
f0706e82 | 2511 | |
73651ee6 JB |
2512 | sta = sta_info_alloc(sdata, addr, GFP_ATOMIC); |
2513 | if (!sta) | |
f0706e82 JB |
2514 | return NULL; |
2515 | ||
07346f81 | 2516 | set_sta_flags(sta, WLAN_STA_AUTHORIZED); |
238814fd | 2517 | |
8e1535d5 | 2518 | /* make sure mandatory rates are always added */ |
323ce79a | 2519 | sta->sta.supp_rates[band] = supp_rates | |
96dd22ac | 2520 | ieee80211_mandatory_rates(local, band); |
f0706e82 | 2521 | |
4b7679a5 | 2522 | rate_control_rate_init(sta); |
f0706e82 | 2523 | |
93e5deb1 | 2524 | if (sta_info_insert(sta)) |
73651ee6 | 2525 | return NULL; |
73651ee6 | 2526 | |
d0709a65 | 2527 | return sta; |
f0706e82 JB |
2528 | } |
2529 | ||
9c6bd790 JB |
2530 | /* configuration hooks */ |
2531 | void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata, | |
2532 | struct ieee80211_if_sta *ifsta) | |
60f8b39c JB |
2533 | { |
2534 | struct ieee80211_local *local = sdata->local; | |
60f8b39c | 2535 | |
05c914fe | 2536 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
9c6bd790 | 2537 | return; |
60f8b39c | 2538 | |
9c6bd790 JB |
2539 | if ((ifsta->flags & (IEEE80211_STA_BSSID_SET | |
2540 | IEEE80211_STA_AUTO_BSSID_SEL)) && | |
2541 | (ifsta->flags & (IEEE80211_STA_SSID_SET | | |
2542 | IEEE80211_STA_AUTO_SSID_SEL))) { | |
60f8b39c | 2543 | |
9c6bd790 JB |
2544 | if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) |
2545 | ieee80211_set_disassoc(sdata, ifsta, true, true, | |
2546 | WLAN_REASON_DEAUTH_LEAVING); | |
60f8b39c | 2547 | |
9c6bd790 JB |
2548 | set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); |
2549 | queue_work(local->hw.workqueue, &ifsta->work); | |
2550 | } | |
2551 | } | |
60f8b39c | 2552 | |
9c6bd790 JB |
2553 | int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len) |
2554 | { | |
2555 | struct ieee80211_if_sta *ifsta; | |
60f8b39c | 2556 | |
9c6bd790 JB |
2557 | if (len > IEEE80211_MAX_SSID_LEN) |
2558 | return -EINVAL; | |
2559 | ||
2560 | ifsta = &sdata->u.sta; | |
2561 | ||
2562 | if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) { | |
2563 | memset(ifsta->ssid, 0, sizeof(ifsta->ssid)); | |
2564 | memcpy(ifsta->ssid, ssid, len); | |
2565 | ifsta->ssid_len = len; | |
2566 | ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET; | |
60f8b39c | 2567 | } |
60f8b39c | 2568 | |
9c6bd790 JB |
2569 | if (len) |
2570 | ifsta->flags |= IEEE80211_STA_SSID_SET; | |
2571 | else | |
2572 | ifsta->flags &= ~IEEE80211_STA_SSID_SET; | |
60f8b39c | 2573 | |
05c914fe | 2574 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && |
9c6bd790 JB |
2575 | !(ifsta->flags & IEEE80211_STA_BSSID_SET)) { |
2576 | ifsta->ibss_join_req = jiffies; | |
2577 | ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH; | |
2578 | return ieee80211_sta_find_ibss(sdata, ifsta); | |
2579 | } | |
2580 | ||
2581 | return 0; | |
2582 | } | |
2583 | ||
2584 | int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len) | |
2585 | { | |
2586 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
2587 | memcpy(ssid, ifsta->ssid, ifsta->ssid_len); | |
2588 | *len = ifsta->ssid_len; | |
2589 | return 0; | |
2590 | } | |
2591 | ||
2592 | int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid) | |
2593 | { | |
2594 | struct ieee80211_if_sta *ifsta; | |
2595 | int res; | |
0efcdfd6 | 2596 | bool valid; |
9c6bd790 JB |
2597 | |
2598 | ifsta = &sdata->u.sta; | |
0efcdfd6 | 2599 | valid = is_valid_ether_addr(bssid); |
9c6bd790 JB |
2600 | |
2601 | if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) { | |
0efcdfd6 AF |
2602 | if(valid) |
2603 | memcpy(ifsta->bssid, bssid, ETH_ALEN); | |
2604 | else | |
2605 | memset(ifsta->bssid, 0, ETH_ALEN); | |
9c6bd790 JB |
2606 | res = 0; |
2607 | /* | |
2608 | * Hack! See also ieee80211_sta_set_ssid. | |
60f8b39c | 2609 | */ |
9c6bd790 JB |
2610 | if (netif_running(sdata->dev)) |
2611 | res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID); | |
2612 | if (res) { | |
2613 | printk(KERN_DEBUG "%s: Failed to config new BSSID to " | |
2614 | "the low-level driver\n", sdata->dev->name); | |
2615 | return res; | |
2616 | } | |
2617 | } | |
60f8b39c | 2618 | |
0efcdfd6 | 2619 | if (valid) |
9c6bd790 JB |
2620 | ifsta->flags |= IEEE80211_STA_BSSID_SET; |
2621 | else | |
2622 | ifsta->flags &= ~IEEE80211_STA_BSSID_SET; | |
2623 | ||
2624 | return 0; | |
2625 | } | |
2626 | ||
2627 | int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len) | |
2628 | { | |
2629 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
2630 | ||
2631 | kfree(ifsta->extra_ie); | |
2632 | if (len == 0) { | |
2633 | ifsta->extra_ie = NULL; | |
2634 | ifsta->extra_ie_len = 0; | |
60f8b39c | 2635 | return 0; |
60f8b39c | 2636 | } |
9c6bd790 JB |
2637 | ifsta->extra_ie = kmalloc(len, GFP_KERNEL); |
2638 | if (!ifsta->extra_ie) { | |
2639 | ifsta->extra_ie_len = 0; | |
2640 | return -ENOMEM; | |
2641 | } | |
2642 | memcpy(ifsta->extra_ie, ie, len); | |
2643 | ifsta->extra_ie_len = len; | |
2644 | return 0; | |
60f8b39c JB |
2645 | } |
2646 | ||
f698d856 | 2647 | int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 2648 | { |
f0706e82 JB |
2649 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
2650 | ||
f4ea83dd | 2651 | printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n", |
f698d856 | 2652 | sdata->dev->name, reason); |
f0706e82 | 2653 | |
05c914fe JB |
2654 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
2655 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
f0706e82 JB |
2656 | return -EINVAL; |
2657 | ||
aa458d17 | 2658 | ieee80211_set_disassoc(sdata, ifsta, true, true, reason); |
f0706e82 JB |
2659 | return 0; |
2660 | } | |
2661 | ||
f698d856 | 2662 | int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 2663 | { |
f0706e82 JB |
2664 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
2665 | ||
f4ea83dd | 2666 | printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n", |
f698d856 | 2667 | sdata->dev->name, reason); |
f0706e82 | 2668 | |
05c914fe | 2669 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
f0706e82 JB |
2670 | return -EINVAL; |
2671 | ||
d6f2da5b | 2672 | if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED)) |
f0706e82 JB |
2673 | return -1; |
2674 | ||
aa458d17 | 2675 | ieee80211_set_disassoc(sdata, ifsta, false, true, reason); |
f0706e82 JB |
2676 | return 0; |
2677 | } | |
84363e6e | 2678 | |
9c6bd790 JB |
2679 | /* scan finished notification */ |
2680 | void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) | |
2681 | { | |
2682 | struct ieee80211_sub_if_data *sdata = local->scan_sdata; | |
2683 | struct ieee80211_if_sta *ifsta; | |
2684 | ||
05c914fe | 2685 | if (sdata && sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
9c6bd790 JB |
2686 | ifsta = &sdata->u.sta; |
2687 | if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) || | |
2688 | (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) && | |
2689 | !ieee80211_sta_active_ibss(sdata))) | |
2690 | ieee80211_sta_find_ibss(sdata, ifsta); | |
2691 | } | |
2692 | ||
2693 | /* Restart STA timers */ | |
2694 | rcu_read_lock(); | |
2695 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
2696 | ieee80211_restart_sta_timer(sdata); | |
2697 | rcu_read_unlock(); | |
2698 | } | |
520eb820 KV |
2699 | |
2700 | void ieee80211_dynamic_ps_disable_work(struct work_struct *work) | |
2701 | { | |
2702 | struct ieee80211_local *local = | |
2703 | container_of(work, struct ieee80211_local, | |
2704 | dynamic_ps_disable_work); | |
2705 | ||
2706 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { | |
2707 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
2708 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
2709 | } | |
2710 | ||
2711 | ieee80211_wake_queues_by_reason(&local->hw, | |
2712 | IEEE80211_QUEUE_STOP_REASON_PS); | |
2713 | } | |
2714 | ||
2715 | void ieee80211_dynamic_ps_enable_work(struct work_struct *work) | |
2716 | { | |
2717 | struct ieee80211_local *local = | |
2718 | container_of(work, struct ieee80211_local, | |
2719 | dynamic_ps_enable_work); | |
a97b77b9 | 2720 | struct ieee80211_sub_if_data *sdata = local->scan_sdata; |
520eb820 KV |
2721 | |
2722 | if (local->hw.conf.flags & IEEE80211_CONF_PS) | |
2723 | return; | |
2724 | ||
4be8c387 JB |
2725 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) |
2726 | ieee80211_send_nullfunc(local, sdata, 1); | |
520eb820 | 2727 | |
4be8c387 | 2728 | local->hw.conf.flags |= IEEE80211_CONF_PS; |
520eb820 KV |
2729 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
2730 | } | |
2731 | ||
2732 | void ieee80211_dynamic_ps_timer(unsigned long data) | |
2733 | { | |
2734 | struct ieee80211_local *local = (void *) data; | |
2735 | ||
2736 | queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work); | |
2737 | } |