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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 | ||
00d3f14c | 58 | pos = bss->cbss.information_elements; |
43ac2ca3 JM |
59 | if (pos == NULL) |
60 | return NULL; | |
00d3f14c | 61 | end = pos + bss->cbss.len_information_elements; |
43ac2ca3 JM |
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 | 75 | struct ieee80211_supported_band *sband, |
881d948c | 76 | u32 *rates) |
9ac19a90 JB |
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 | 95 | /* also used by mesh code */ |
881d948c | 96 | u32 ieee80211_sta_get_rates(struct ieee80211_local *local, |
9c6bd790 JB |
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; | |
881d948c | 103 | u32 supp_rates; |
9c6bd790 JB |
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 | ||
9aed3cc1 JM |
134 | static void add_extra_ies(struct sk_buff *skb, u8 *ies, size_t ies_len) |
135 | { | |
136 | if (ies) | |
137 | memcpy(skb_put(skb, ies_len), ies, ies_len); | |
138 | } | |
139 | ||
9c6bd790 | 140 | /* also used by scanning code */ |
0a51b27e JB |
141 | void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst, |
142 | u8 *ssid, size_t ssid_len) | |
60f8b39c JB |
143 | { |
144 | struct ieee80211_local *local = sdata->local; | |
145 | struct ieee80211_supported_band *sband; | |
146 | struct sk_buff *skb; | |
147 | struct ieee80211_mgmt *mgmt; | |
148 | u8 *pos, *supp_rates, *esupp_rates = NULL; | |
149 | int i; | |
150 | ||
9aed3cc1 JM |
151 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200 + |
152 | sdata->u.sta.ie_probereq_len); | |
60f8b39c JB |
153 | if (!skb) { |
154 | printk(KERN_DEBUG "%s: failed to allocate buffer for probe " | |
155 | "request\n", sdata->dev->name); | |
156 | return; | |
157 | } | |
158 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
159 | ||
160 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
161 | memset(mgmt, 0, 24); | |
162 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
163 | IEEE80211_STYPE_PROBE_REQ); | |
164 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); | |
165 | if (dst) { | |
166 | memcpy(mgmt->da, dst, ETH_ALEN); | |
167 | memcpy(mgmt->bssid, dst, ETH_ALEN); | |
168 | } else { | |
169 | memset(mgmt->da, 0xff, ETH_ALEN); | |
170 | memset(mgmt->bssid, 0xff, ETH_ALEN); | |
171 | } | |
172 | pos = skb_put(skb, 2 + ssid_len); | |
173 | *pos++ = WLAN_EID_SSID; | |
174 | *pos++ = ssid_len; | |
175 | memcpy(pos, ssid, ssid_len); | |
176 | ||
177 | supp_rates = skb_put(skb, 2); | |
178 | supp_rates[0] = WLAN_EID_SUPP_RATES; | |
179 | supp_rates[1] = 0; | |
180 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
181 | ||
182 | for (i = 0; i < sband->n_bitrates; i++) { | |
183 | struct ieee80211_rate *rate = &sband->bitrates[i]; | |
184 | if (esupp_rates) { | |
185 | pos = skb_put(skb, 1); | |
186 | esupp_rates[1]++; | |
187 | } else if (supp_rates[1] == 8) { | |
188 | esupp_rates = skb_put(skb, 3); | |
189 | esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES; | |
190 | esupp_rates[1] = 1; | |
191 | pos = &esupp_rates[2]; | |
192 | } else { | |
193 | pos = skb_put(skb, 1); | |
194 | supp_rates[1]++; | |
195 | } | |
196 | *pos = rate->bitrate / 5; | |
197 | } | |
198 | ||
9aed3cc1 JM |
199 | add_extra_ies(skb, sdata->u.sta.ie_probereq, |
200 | sdata->u.sta.ie_probereq_len); | |
201 | ||
e50db65c | 202 | ieee80211_tx_skb(sdata, skb, 0); |
60f8b39c JB |
203 | } |
204 | ||
9c6bd790 JB |
205 | static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, |
206 | struct ieee80211_if_sta *ifsta, | |
207 | int transaction, u8 *extra, size_t extra_len, | |
208 | int encrypt) | |
209 | { | |
210 | struct ieee80211_local *local = sdata->local; | |
211 | struct sk_buff *skb; | |
212 | struct ieee80211_mgmt *mgmt; | |
213 | ||
214 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
9aed3cc1 JM |
215 | sizeof(*mgmt) + 6 + extra_len + |
216 | sdata->u.sta.ie_auth_len); | |
9c6bd790 JB |
217 | if (!skb) { |
218 | printk(KERN_DEBUG "%s: failed to allocate buffer for auth " | |
219 | "frame\n", sdata->dev->name); | |
220 | return; | |
221 | } | |
222 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
223 | ||
224 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); | |
225 | memset(mgmt, 0, 24 + 6); | |
226 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
227 | IEEE80211_STYPE_AUTH); | |
228 | if (encrypt) | |
229 | mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
230 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
231 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); | |
232 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
233 | mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg); | |
234 | mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); | |
235 | ifsta->auth_transaction = transaction + 1; | |
236 | mgmt->u.auth.status_code = cpu_to_le16(0); | |
237 | if (extra) | |
238 | memcpy(skb_put(skb, extra_len), extra, extra_len); | |
9aed3cc1 | 239 | add_extra_ies(skb, sdata->u.sta.ie_auth, sdata->u.sta.ie_auth_len); |
9c6bd790 JB |
240 | |
241 | ieee80211_tx_skb(sdata, skb, encrypt); | |
242 | } | |
243 | ||
9ac19a90 JB |
244 | static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata, |
245 | struct ieee80211_if_sta *ifsta) | |
246 | { | |
247 | struct ieee80211_local *local = sdata->local; | |
248 | struct sk_buff *skb; | |
249 | struct ieee80211_mgmt *mgmt; | |
9aed3cc1 | 250 | u8 *pos, *ies, *ht_ie, *e_ies; |
9ac19a90 JB |
251 | int i, len, count, rates_len, supp_rates_len; |
252 | u16 capab; | |
c2b13452 | 253 | struct ieee80211_bss *bss; |
9ac19a90 JB |
254 | int wmm = 0; |
255 | struct ieee80211_supported_band *sband; | |
881d948c | 256 | u32 rates = 0; |
9aed3cc1 JM |
257 | size_t e_ies_len; |
258 | ||
259 | if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) { | |
260 | e_ies = sdata->u.sta.ie_reassocreq; | |
261 | e_ies_len = sdata->u.sta.ie_reassocreq_len; | |
262 | } else { | |
263 | e_ies = sdata->u.sta.ie_assocreq; | |
264 | e_ies_len = sdata->u.sta.ie_assocreq_len; | |
265 | } | |
9ac19a90 JB |
266 | |
267 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
268 | sizeof(*mgmt) + 200 + ifsta->extra_ie_len + | |
9aed3cc1 | 269 | ifsta->ssid_len + e_ies_len); |
9ac19a90 JB |
270 | if (!skb) { |
271 | printk(KERN_DEBUG "%s: failed to allocate buffer for assoc " | |
272 | "frame\n", sdata->dev->name); | |
273 | return; | |
274 | } | |
275 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
276 | ||
277 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
278 | ||
279 | capab = ifsta->capab; | |
280 | ||
281 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) { | |
282 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) | |
283 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; | |
284 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) | |
285 | capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; | |
286 | } | |
287 | ||
288 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, | |
289 | local->hw.conf.channel->center_freq, | |
290 | ifsta->ssid, ifsta->ssid_len); | |
291 | if (bss) { | |
00d3f14c | 292 | if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY) |
9ac19a90 JB |
293 | capab |= WLAN_CAPABILITY_PRIVACY; |
294 | if (bss->wmm_used) | |
295 | wmm = 1; | |
296 | ||
297 | /* get all rates supported by the device and the AP as | |
298 | * some APs don't like getting a superset of their rates | |
299 | * in the association request (e.g. D-Link DAP 1353 in | |
300 | * b-only mode) */ | |
301 | rates_len = ieee80211_compatible_rates(bss, sband, &rates); | |
302 | ||
00d3f14c | 303 | if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && |
9ac19a90 JB |
304 | (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)) |
305 | capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; | |
306 | ||
307 | ieee80211_rx_bss_put(local, bss); | |
308 | } else { | |
309 | rates = ~0; | |
310 | rates_len = sband->n_bitrates; | |
311 | } | |
312 | ||
313 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
314 | memset(mgmt, 0, 24); | |
315 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
316 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); | |
317 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
318 | ||
319 | if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) { | |
320 | skb_put(skb, 10); | |
321 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
322 | IEEE80211_STYPE_REASSOC_REQ); | |
323 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); | |
324 | mgmt->u.reassoc_req.listen_interval = | |
325 | cpu_to_le16(local->hw.conf.listen_interval); | |
326 | memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid, | |
327 | ETH_ALEN); | |
328 | } else { | |
329 | skb_put(skb, 4); | |
330 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
331 | IEEE80211_STYPE_ASSOC_REQ); | |
332 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); | |
13554121 | 333 | mgmt->u.assoc_req.listen_interval = |
9ac19a90 JB |
334 | cpu_to_le16(local->hw.conf.listen_interval); |
335 | } | |
336 | ||
337 | /* SSID */ | |
338 | ies = pos = skb_put(skb, 2 + ifsta->ssid_len); | |
339 | *pos++ = WLAN_EID_SSID; | |
340 | *pos++ = ifsta->ssid_len; | |
341 | memcpy(pos, ifsta->ssid, ifsta->ssid_len); | |
342 | ||
343 | /* add all rates which were marked to be used above */ | |
344 | supp_rates_len = rates_len; | |
345 | if (supp_rates_len > 8) | |
346 | supp_rates_len = 8; | |
347 | ||
348 | len = sband->n_bitrates; | |
349 | pos = skb_put(skb, supp_rates_len + 2); | |
350 | *pos++ = WLAN_EID_SUPP_RATES; | |
351 | *pos++ = supp_rates_len; | |
352 | ||
353 | count = 0; | |
354 | for (i = 0; i < sband->n_bitrates; i++) { | |
355 | if (BIT(i) & rates) { | |
356 | int rate = sband->bitrates[i].bitrate; | |
357 | *pos++ = (u8) (rate / 5); | |
358 | if (++count == 8) | |
359 | break; | |
360 | } | |
361 | } | |
362 | ||
363 | if (rates_len > count) { | |
364 | pos = skb_put(skb, rates_len - count + 2); | |
365 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
366 | *pos++ = rates_len - count; | |
367 | ||
368 | for (i++; i < sband->n_bitrates; i++) { | |
369 | if (BIT(i) & rates) { | |
370 | int rate = sband->bitrates[i].bitrate; | |
371 | *pos++ = (u8) (rate / 5); | |
372 | } | |
373 | } | |
374 | } | |
375 | ||
376 | if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { | |
377 | /* 1. power capabilities */ | |
378 | pos = skb_put(skb, 4); | |
379 | *pos++ = WLAN_EID_PWR_CAPABILITY; | |
380 | *pos++ = 2; | |
381 | *pos++ = 0; /* min tx power */ | |
382 | *pos++ = local->hw.conf.channel->max_power; /* max tx power */ | |
383 | ||
384 | /* 2. supported channels */ | |
385 | /* TODO: get this in reg domain format */ | |
386 | pos = skb_put(skb, 2 * sband->n_channels + 2); | |
387 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; | |
388 | *pos++ = 2 * sband->n_channels; | |
389 | for (i = 0; i < sband->n_channels; i++) { | |
390 | *pos++ = ieee80211_frequency_to_channel( | |
391 | sband->channels[i].center_freq); | |
392 | *pos++ = 1; /* one channel in the subband*/ | |
393 | } | |
394 | } | |
395 | ||
396 | if (ifsta->extra_ie) { | |
397 | pos = skb_put(skb, ifsta->extra_ie_len); | |
398 | memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len); | |
399 | } | |
400 | ||
401 | if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) { | |
402 | pos = skb_put(skb, 9); | |
403 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
404 | *pos++ = 7; /* len */ | |
405 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ | |
406 | *pos++ = 0x50; | |
407 | *pos++ = 0xf2; | |
408 | *pos++ = 2; /* WME */ | |
409 | *pos++ = 0; /* WME info */ | |
410 | *pos++ = 1; /* WME ver */ | |
411 | *pos++ = 0; | |
412 | } | |
413 | ||
414 | /* wmm support is a must to HT */ | |
eb46936b VT |
415 | /* |
416 | * IEEE802.11n does not allow TKIP/WEP as pairwise | |
417 | * ciphers in HT mode. We still associate in non-ht | |
418 | * mode (11a/b/g) if any one of these ciphers is | |
419 | * configured as pairwise. | |
420 | */ | |
9ac19a90 | 421 | if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) && |
d9fe60de JB |
422 | sband->ht_cap.ht_supported && |
423 | (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) && | |
eb46936b VT |
424 | ht_ie[1] >= sizeof(struct ieee80211_ht_info) && |
425 | (!(ifsta->flags & IEEE80211_STA_TKIP_WEP_USED))) { | |
d9fe60de JB |
426 | struct ieee80211_ht_info *ht_info = |
427 | (struct ieee80211_ht_info *)(ht_ie + 2); | |
428 | u16 cap = sband->ht_cap.cap; | |
9ac19a90 JB |
429 | __le16 tmp; |
430 | u32 flags = local->hw.conf.channel->flags; | |
431 | ||
d9fe60de JB |
432 | switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { |
433 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
9ac19a90 | 434 | if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) { |
d9fe60de | 435 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
9ac19a90 JB |
436 | cap &= ~IEEE80211_HT_CAP_SGI_40; |
437 | } | |
438 | break; | |
d9fe60de | 439 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: |
9ac19a90 | 440 | if (flags & IEEE80211_CHAN_NO_FAT_BELOW) { |
d9fe60de | 441 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
9ac19a90 JB |
442 | cap &= ~IEEE80211_HT_CAP_SGI_40; |
443 | } | |
444 | break; | |
445 | } | |
446 | ||
447 | tmp = cpu_to_le16(cap); | |
448 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2); | |
449 | *pos++ = WLAN_EID_HT_CAPABILITY; | |
450 | *pos++ = sizeof(struct ieee80211_ht_cap); | |
451 | memset(pos, 0, sizeof(struct ieee80211_ht_cap)); | |
452 | memcpy(pos, &tmp, sizeof(u16)); | |
453 | pos += sizeof(u16); | |
454 | /* TODO: needs a define here for << 2 */ | |
d9fe60de JB |
455 | *pos++ = sband->ht_cap.ampdu_factor | |
456 | (sband->ht_cap.ampdu_density << 2); | |
457 | memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs)); | |
9ac19a90 JB |
458 | } |
459 | ||
9aed3cc1 JM |
460 | add_extra_ies(skb, e_ies, e_ies_len); |
461 | ||
9ac19a90 JB |
462 | kfree(ifsta->assocreq_ies); |
463 | ifsta->assocreq_ies_len = (skb->data + skb->len) - ies; | |
464 | ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL); | |
465 | if (ifsta->assocreq_ies) | |
466 | memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len); | |
467 | ||
e50db65c | 468 | ieee80211_tx_skb(sdata, skb, 0); |
9ac19a90 JB |
469 | } |
470 | ||
471 | ||
ef422bc0 JB |
472 | static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, |
473 | u16 stype, u16 reason) | |
9ac19a90 JB |
474 | { |
475 | struct ieee80211_local *local = sdata->local; | |
ef422bc0 | 476 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
9ac19a90 JB |
477 | struct sk_buff *skb; |
478 | struct ieee80211_mgmt *mgmt; | |
9aed3cc1 JM |
479 | u8 *ies; |
480 | size_t ies_len; | |
9ac19a90 | 481 | |
9aed3cc1 JM |
482 | if (stype == IEEE80211_STYPE_DEAUTH) { |
483 | ies = sdata->u.sta.ie_deauth; | |
484 | ies_len = sdata->u.sta.ie_deauth_len; | |
485 | } else { | |
486 | ies = sdata->u.sta.ie_disassoc; | |
487 | ies_len = sdata->u.sta.ie_disassoc_len; | |
488 | } | |
489 | ||
490 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + | |
491 | ies_len); | |
9ac19a90 | 492 | if (!skb) { |
ef422bc0 JB |
493 | printk(KERN_DEBUG "%s: failed to allocate buffer for " |
494 | "deauth/disassoc frame\n", sdata->dev->name); | |
9ac19a90 JB |
495 | return; |
496 | } | |
497 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
498 | ||
499 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
500 | memset(mgmt, 0, 24); | |
501 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
502 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); | |
503 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
ef422bc0 | 504 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); |
9ac19a90 | 505 | skb_put(skb, 2); |
ef422bc0 | 506 | /* u.deauth.reason_code == u.disassoc.reason_code */ |
9ac19a90 JB |
507 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); |
508 | ||
9aed3cc1 JM |
509 | add_extra_ies(skb, ies, ies_len); |
510 | ||
5394af4d | 511 | ieee80211_tx_skb(sdata, skb, ifsta->flags & IEEE80211_STA_MFP_ENABLED); |
9ac19a90 JB |
512 | } |
513 | ||
572e0012 KV |
514 | void ieee80211_send_pspoll(struct ieee80211_local *local, |
515 | struct ieee80211_sub_if_data *sdata) | |
516 | { | |
517 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
518 | struct ieee80211_pspoll *pspoll; | |
519 | struct sk_buff *skb; | |
520 | u16 fc; | |
521 | ||
522 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll)); | |
523 | if (!skb) { | |
524 | printk(KERN_DEBUG "%s: failed to allocate buffer for " | |
525 | "pspoll frame\n", sdata->dev->name); | |
526 | return; | |
527 | } | |
528 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
529 | ||
530 | pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll)); | |
531 | memset(pspoll, 0, sizeof(*pspoll)); | |
532 | fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM; | |
533 | pspoll->frame_control = cpu_to_le16(fc); | |
534 | pspoll->aid = cpu_to_le16(ifsta->aid); | |
535 | ||
536 | /* aid in PS-Poll has its two MSBs each set to 1 */ | |
537 | pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14); | |
538 | ||
539 | memcpy(pspoll->bssid, ifsta->bssid, ETH_ALEN); | |
540 | memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN); | |
541 | ||
542 | ieee80211_tx_skb(sdata, skb, 0); | |
543 | ||
544 | return; | |
545 | } | |
546 | ||
60f8b39c | 547 | /* MLME */ |
f698d856 | 548 | static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata, |
99cf5f5f JB |
549 | const size_t supp_rates_len, |
550 | const u8 *supp_rates) | |
e2839d8f | 551 | { |
e2839d8f VK |
552 | struct ieee80211_local *local = sdata->local; |
553 | int i, have_higher_than_11mbit = 0; | |
554 | ||
e2839d8f | 555 | /* cf. IEEE 802.11 9.2.12 */ |
99cf5f5f JB |
556 | for (i = 0; i < supp_rates_len; i++) |
557 | if ((supp_rates[i] & 0x7f) * 5 > 110) | |
e2839d8f VK |
558 | have_higher_than_11mbit = 1; |
559 | ||
560 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
561 | have_higher_than_11mbit) | |
562 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
563 | else | |
564 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
565 | ||
3d35f7c6 | 566 | ieee80211_set_wmm_default(sdata); |
e2839d8f VK |
567 | } |
568 | ||
f698d856 | 569 | static void ieee80211_sta_wmm_params(struct ieee80211_local *local, |
f0706e82 JB |
570 | struct ieee80211_if_sta *ifsta, |
571 | u8 *wmm_param, size_t wmm_param_len) | |
572 | { | |
f0706e82 JB |
573 | struct ieee80211_tx_queue_params params; |
574 | size_t left; | |
575 | int count; | |
576 | u8 *pos; | |
577 | ||
3434fbd3 JB |
578 | if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED)) |
579 | return; | |
580 | ||
581 | if (!wmm_param) | |
582 | return; | |
583 | ||
f0706e82 JB |
584 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) |
585 | return; | |
586 | count = wmm_param[6] & 0x0f; | |
587 | if (count == ifsta->wmm_last_param_set) | |
588 | return; | |
589 | ifsta->wmm_last_param_set = count; | |
590 | ||
591 | pos = wmm_param + 8; | |
592 | left = wmm_param_len - 8; | |
593 | ||
594 | memset(¶ms, 0, sizeof(params)); | |
595 | ||
596 | if (!local->ops->conf_tx) | |
597 | return; | |
598 | ||
599 | local->wmm_acm = 0; | |
600 | for (; left >= 4; left -= 4, pos += 4) { | |
601 | int aci = (pos[0] >> 5) & 0x03; | |
602 | int acm = (pos[0] >> 4) & 0x01; | |
603 | int queue; | |
604 | ||
605 | switch (aci) { | |
606 | case 1: | |
e100bb64 | 607 | queue = 3; |
988c0f72 | 608 | if (acm) |
f0706e82 | 609 | local->wmm_acm |= BIT(0) | BIT(3); |
f0706e82 JB |
610 | break; |
611 | case 2: | |
e100bb64 | 612 | queue = 1; |
988c0f72 | 613 | if (acm) |
f0706e82 | 614 | local->wmm_acm |= BIT(4) | BIT(5); |
f0706e82 JB |
615 | break; |
616 | case 3: | |
e100bb64 | 617 | queue = 0; |
988c0f72 | 618 | if (acm) |
f0706e82 | 619 | local->wmm_acm |= BIT(6) | BIT(7); |
f0706e82 JB |
620 | break; |
621 | case 0: | |
622 | default: | |
e100bb64 | 623 | queue = 2; |
988c0f72 | 624 | if (acm) |
f0706e82 | 625 | local->wmm_acm |= BIT(1) | BIT(2); |
f0706e82 JB |
626 | break; |
627 | } | |
628 | ||
629 | params.aifs = pos[0] & 0x0f; | |
630 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); | |
631 | params.cw_min = ecw2cw(pos[1] & 0x0f); | |
f434b2d1 | 632 | params.txop = get_unaligned_le16(pos + 2); |
f4ea83dd | 633 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
f0706e82 | 634 | printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d " |
3330d7be | 635 | "cWmin=%d cWmax=%d txop=%d\n", |
f698d856 | 636 | local->mdev->name, queue, aci, acm, params.aifs, params.cw_min, |
3330d7be JB |
637 | params.cw_max, params.txop); |
638 | #endif | |
f0706e82 JB |
639 | /* TODO: handle ACM (block TX, fallback to next lowest allowed |
640 | * AC for now) */ | |
641 | if (local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) { | |
642 | printk(KERN_DEBUG "%s: failed to set TX queue " | |
f698d856 | 643 | "parameters for queue %d\n", local->mdev->name, queue); |
f0706e82 JB |
644 | } |
645 | } | |
646 | } | |
647 | ||
1fb3606b | 648 | static bool ieee80211_check_tim(struct ieee802_11_elems *elems, u16 aid) |
a97b77b9 VN |
649 | { |
650 | u8 mask; | |
651 | u8 index, indexn1, indexn2; | |
652 | struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *) elems->tim; | |
653 | ||
654 | aid &= 0x3fff; | |
655 | index = aid / 8; | |
656 | mask = 1 << (aid & 7); | |
657 | ||
a97b77b9 VN |
658 | indexn1 = tim->bitmap_ctrl & 0xfe; |
659 | indexn2 = elems->tim_len + indexn1 - 4; | |
660 | ||
661 | if (index < indexn1 || index > indexn2) | |
662 | return false; | |
663 | ||
664 | index -= indexn1; | |
665 | ||
666 | return !!(tim->virtual_map[index] & mask); | |
667 | } | |
668 | ||
7a5158ef JB |
669 | static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, |
670 | u16 capab, bool erp_valid, u8 erp) | |
5628221c | 671 | { |
bda3933a | 672 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
ebd74487 | 673 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
5628221c | 674 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
ebd74487 | 675 | #endif |
471b3efd | 676 | u32 changed = 0; |
7a5158ef JB |
677 | bool use_protection; |
678 | bool use_short_preamble; | |
679 | bool use_short_slot; | |
680 | ||
681 | if (erp_valid) { | |
682 | use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; | |
683 | use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; | |
684 | } else { | |
685 | use_protection = false; | |
686 | use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); | |
687 | } | |
688 | ||
689 | use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); | |
5628221c | 690 | |
471b3efd | 691 | if (use_protection != bss_conf->use_cts_prot) { |
f4ea83dd | 692 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
5628221c | 693 | if (net_ratelimit()) { |
0c68ae26 | 694 | printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n", |
471b3efd | 695 | sdata->dev->name, |
5628221c | 696 | use_protection ? "enabled" : "disabled", |
0c68ae26 | 697 | ifsta->bssid); |
5628221c | 698 | } |
f4ea83dd | 699 | #endif |
471b3efd JB |
700 | bss_conf->use_cts_prot = use_protection; |
701 | changed |= BSS_CHANGED_ERP_CTS_PROT; | |
5628221c | 702 | } |
7e9ed188 | 703 | |
d43c7b37 | 704 | if (use_short_preamble != bss_conf->use_short_preamble) { |
f4ea83dd | 705 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
7e9ed188 DD |
706 | if (net_ratelimit()) { |
707 | printk(KERN_DEBUG "%s: switched to %s barker preamble" | |
0c68ae26 | 708 | " (BSSID=%pM)\n", |
471b3efd | 709 | sdata->dev->name, |
d43c7b37 | 710 | use_short_preamble ? "short" : "long", |
0c68ae26 | 711 | ifsta->bssid); |
7e9ed188 | 712 | } |
f4ea83dd | 713 | #endif |
d43c7b37 | 714 | bss_conf->use_short_preamble = use_short_preamble; |
471b3efd | 715 | changed |= BSS_CHANGED_ERP_PREAMBLE; |
7e9ed188 | 716 | } |
d9430a32 | 717 | |
7a5158ef JB |
718 | if (use_short_slot != bss_conf->use_short_slot) { |
719 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
720 | if (net_ratelimit()) { | |
391429c1 CL |
721 | printk(KERN_DEBUG "%s: switched to %s slot time" |
722 | " (BSSID=%pM)\n", | |
7a5158ef JB |
723 | sdata->dev->name, |
724 | use_short_slot ? "short" : "long", | |
725 | ifsta->bssid); | |
726 | } | |
727 | #endif | |
728 | bss_conf->use_short_slot = use_short_slot; | |
729 | changed |= BSS_CHANGED_ERP_SLOT; | |
50c4afb9 JL |
730 | } |
731 | ||
732 | return changed; | |
733 | } | |
734 | ||
f5e5bf25 TW |
735 | static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata, |
736 | struct ieee80211_if_sta *ifsta) | |
737 | { | |
738 | union iwreq_data wrqu; | |
739 | memset(&wrqu, 0, sizeof(wrqu)); | |
740 | if (ifsta->flags & IEEE80211_STA_ASSOCIATED) | |
741 | memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN); | |
742 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; | |
743 | wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL); | |
744 | } | |
745 | ||
f698d856 | 746 | static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
747 | struct ieee80211_if_sta *ifsta) |
748 | { | |
74af0250 LT |
749 | char *buf; |
750 | size_t len; | |
751 | int i; | |
f0706e82 JB |
752 | union iwreq_data wrqu; |
753 | ||
74af0250 LT |
754 | if (!ifsta->assocreq_ies && !ifsta->assocresp_ies) |
755 | return; | |
756 | ||
757 | buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len + | |
758 | ifsta->assocresp_ies_len), GFP_KERNEL); | |
759 | if (!buf) | |
760 | return; | |
761 | ||
762 | len = sprintf(buf, "ASSOCINFO("); | |
f0706e82 | 763 | if (ifsta->assocreq_ies) { |
74af0250 LT |
764 | len += sprintf(buf + len, "ReqIEs="); |
765 | for (i = 0; i < ifsta->assocreq_ies_len; i++) { | |
766 | len += sprintf(buf + len, "%02x", | |
767 | ifsta->assocreq_ies[i]); | |
768 | } | |
f0706e82 | 769 | } |
087d833e | 770 | if (ifsta->assocresp_ies) { |
74af0250 LT |
771 | if (ifsta->assocreq_ies) |
772 | len += sprintf(buf + len, " "); | |
773 | len += sprintf(buf + len, "RespIEs="); | |
774 | for (i = 0; i < ifsta->assocresp_ies_len; i++) { | |
775 | len += sprintf(buf + len, "%02x", | |
776 | ifsta->assocresp_ies[i]); | |
777 | } | |
f0706e82 | 778 | } |
74af0250 LT |
779 | len += sprintf(buf + len, ")"); |
780 | ||
781 | if (len > IW_CUSTOM_MAX) { | |
782 | len = sprintf(buf, "ASSOCRESPIE="); | |
783 | for (i = 0; i < ifsta->assocresp_ies_len; i++) { | |
784 | len += sprintf(buf + len, "%02x", | |
785 | ifsta->assocresp_ies[i]); | |
786 | } | |
787 | } | |
788 | ||
ad788b5e JL |
789 | if (len <= IW_CUSTOM_MAX) { |
790 | memset(&wrqu, 0, sizeof(wrqu)); | |
791 | wrqu.data.length = len; | |
792 | wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf); | |
793 | } | |
74af0250 LT |
794 | |
795 | kfree(buf); | |
f0706e82 JB |
796 | } |
797 | ||
798 | ||
f698d856 | 799 | static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
ae5eb026 JB |
800 | struct ieee80211_if_sta *ifsta, |
801 | u32 bss_info_changed) | |
f0706e82 | 802 | { |
471b3efd | 803 | struct ieee80211_local *local = sdata->local; |
38668c05 | 804 | struct ieee80211_conf *conf = &local_to_hw(local)->conf; |
f0706e82 | 805 | |
c2b13452 | 806 | struct ieee80211_bss *bss; |
d6f2da5b | 807 | |
ae5eb026 | 808 | bss_info_changed |= BSS_CHANGED_ASSOC; |
f5e5bf25 | 809 | ifsta->flags |= IEEE80211_STA_ASSOCIATED; |
5628221c | 810 | |
05c914fe | 811 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
f5e5bf25 | 812 | return; |
21c0cbe7 | 813 | |
f5e5bf25 TW |
814 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
815 | conf->channel->center_freq, | |
816 | ifsta->ssid, ifsta->ssid_len); | |
817 | if (bss) { | |
818 | /* set timing information */ | |
00d3f14c JB |
819 | sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval; |
820 | sdata->vif.bss_conf.timestamp = bss->cbss.tsf; | |
bda3933a | 821 | sdata->vif.bss_conf.dtim_period = bss->dtim_period; |
21c0cbe7 | 822 | |
ae5eb026 | 823 | bss_info_changed |= ieee80211_handle_bss_capability(sdata, |
00d3f14c | 824 | bss->cbss.capability, bss->has_erp_value, bss->erp_value); |
9ac19a90 JB |
825 | |
826 | ieee80211_rx_bss_put(local, bss); | |
f0706e82 JB |
827 | } |
828 | ||
9ac19a90 JB |
829 | ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET; |
830 | memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN); | |
831 | ieee80211_sta_send_associnfo(sdata, ifsta); | |
9306102e | 832 | |
9ac19a90 JB |
833 | ifsta->last_probe = jiffies; |
834 | ieee80211_led_assoc(local, 1); | |
9306102e | 835 | |
bda3933a | 836 | sdata->vif.bss_conf.assoc = 1; |
96dd22ac JB |
837 | /* |
838 | * For now just always ask the driver to update the basic rateset | |
839 | * when we have associated, we aren't checking whether it actually | |
840 | * changed or not. | |
841 | */ | |
ae5eb026 JB |
842 | bss_info_changed |= BSS_CHANGED_BASIC_RATES; |
843 | ieee80211_bss_info_change_notify(sdata, bss_info_changed); | |
f0706e82 | 844 | |
4be8c387 JB |
845 | if (local->powersave) { |
846 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) && | |
847 | local->hw.conf.dynamic_ps_timeout > 0) { | |
520eb820 | 848 | mod_timer(&local->dynamic_ps_timer, jiffies + |
46f2c4bd JB |
849 | msecs_to_jiffies( |
850 | local->hw.conf.dynamic_ps_timeout)); | |
4be8c387 JB |
851 | } else { |
852 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
853 | ieee80211_send_nullfunc(local, sdata, 1); | |
520eb820 | 854 | conf->flags |= IEEE80211_CONF_PS; |
4be8c387 | 855 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
520eb820 | 856 | } |
e0cb686f KV |
857 | } |
858 | ||
9ac19a90 JB |
859 | netif_tx_start_all_queues(sdata->dev); |
860 | netif_carrier_on(sdata->dev); | |
f0706e82 | 861 | |
9ac19a90 | 862 | ieee80211_sta_send_apinfo(sdata, ifsta); |
f0706e82 JB |
863 | } |
864 | ||
9ac19a90 JB |
865 | static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata, |
866 | struct ieee80211_if_sta *ifsta) | |
f0706e82 | 867 | { |
9ac19a90 JB |
868 | ifsta->direct_probe_tries++; |
869 | if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0c68ae26 JB |
870 | printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n", |
871 | sdata->dev->name, ifsta->bssid); | |
9ac19a90 | 872 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
4a68ec53 | 873 | ieee80211_sta_send_apinfo(sdata, ifsta); |
7a947080 VT |
874 | |
875 | /* | |
876 | * Most likely AP is not in the range so remove the | |
877 | * bss information associated to the AP | |
878 | */ | |
879 | ieee80211_rx_bss_remove(sdata, ifsta->bssid, | |
880 | sdata->local->hw.conf.channel->center_freq, | |
881 | ifsta->ssid, ifsta->ssid_len); | |
f0706e82 JB |
882 | return; |
883 | } | |
f0706e82 | 884 | |
0c68ae26 JB |
885 | printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n", |
886 | sdata->dev->name, ifsta->bssid, | |
9ac19a90 | 887 | ifsta->direct_probe_tries); |
f0706e82 | 888 | |
9ac19a90 | 889 | ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
f0706e82 | 890 | |
9ac19a90 JB |
891 | set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request); |
892 | ||
893 | /* Direct probe is sent to broadcast address as some APs | |
894 | * will not answer to direct packet in unassociated state. | |
895 | */ | |
896 | ieee80211_send_probe_req(sdata, NULL, | |
897 | ifsta->ssid, ifsta->ssid_len); | |
898 | ||
899 | mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT); | |
60f8b39c | 900 | } |
f0706e82 | 901 | |
9ac19a90 JB |
902 | |
903 | static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata, | |
904 | struct ieee80211_if_sta *ifsta) | |
f0706e82 | 905 | { |
9ac19a90 JB |
906 | ifsta->auth_tries++; |
907 | if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0c68ae26 | 908 | printk(KERN_DEBUG "%s: authentication with AP %pM" |
9ac19a90 | 909 | " timed out\n", |
0c68ae26 | 910 | sdata->dev->name, ifsta->bssid); |
9ac19a90 | 911 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
4a68ec53 | 912 | ieee80211_sta_send_apinfo(sdata, ifsta); |
7a947080 VT |
913 | ieee80211_rx_bss_remove(sdata, ifsta->bssid, |
914 | sdata->local->hw.conf.channel->center_freq, | |
915 | ifsta->ssid, ifsta->ssid_len); | |
f0706e82 JB |
916 | return; |
917 | } | |
f0706e82 | 918 | |
9ac19a90 | 919 | ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE; |
0c68ae26 JB |
920 | printk(KERN_DEBUG "%s: authenticate with AP %pM\n", |
921 | sdata->dev->name, ifsta->bssid); | |
f0706e82 | 922 | |
9ac19a90 JB |
923 | ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0); |
924 | ||
925 | mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT); | |
f0706e82 JB |
926 | } |
927 | ||
5925d976 VN |
928 | /* |
929 | * The disassoc 'reason' argument can be either our own reason | |
930 | * if self disconnected or a reason code from the AP. | |
931 | */ | |
aa458d17 TW |
932 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, |
933 | struct ieee80211_if_sta *ifsta, bool deauth, | |
934 | bool self_disconnected, u16 reason) | |
935 | { | |
936 | struct ieee80211_local *local = sdata->local; | |
937 | struct sta_info *sta; | |
e0cb686f | 938 | u32 changed = 0, config_changed = 0; |
aa458d17 TW |
939 | |
940 | rcu_read_lock(); | |
941 | ||
942 | sta = sta_info_get(local, ifsta->bssid); | |
943 | if (!sta) { | |
944 | rcu_read_unlock(); | |
945 | return; | |
946 | } | |
947 | ||
948 | if (deauth) { | |
949 | ifsta->direct_probe_tries = 0; | |
950 | ifsta->auth_tries = 0; | |
951 | } | |
952 | ifsta->assoc_scan_tries = 0; | |
953 | ifsta->assoc_tries = 0; | |
954 | ||
24e64622 | 955 | netif_tx_stop_all_queues(sdata->dev); |
aa458d17 TW |
956 | netif_carrier_off(sdata->dev); |
957 | ||
2dace10e | 958 | ieee80211_sta_tear_down_BA_sessions(sta); |
aa458d17 TW |
959 | |
960 | if (self_disconnected) { | |
961 | if (deauth) | |
ef422bc0 JB |
962 | ieee80211_send_deauth_disassoc(sdata, |
963 | IEEE80211_STYPE_DEAUTH, reason); | |
aa458d17 | 964 | else |
ef422bc0 JB |
965 | ieee80211_send_deauth_disassoc(sdata, |
966 | IEEE80211_STYPE_DISASSOC, reason); | |
aa458d17 TW |
967 | } |
968 | ||
f5e5bf25 TW |
969 | ifsta->flags &= ~IEEE80211_STA_ASSOCIATED; |
970 | changed |= ieee80211_reset_erp_info(sdata); | |
971 | ||
f5e5bf25 | 972 | ieee80211_led_assoc(local, 0); |
ae5eb026 JB |
973 | changed |= BSS_CHANGED_ASSOC; |
974 | sdata->vif.bss_conf.assoc = false; | |
f5e5bf25 TW |
975 | |
976 | ieee80211_sta_send_apinfo(sdata, ifsta); | |
aa458d17 | 977 | |
7a947080 | 978 | if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) { |
aa458d17 | 979 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
7a947080 VT |
980 | ieee80211_rx_bss_remove(sdata, ifsta->bssid, |
981 | sdata->local->hw.conf.channel->center_freq, | |
982 | ifsta->ssid, ifsta->ssid_len); | |
983 | } | |
aa458d17 | 984 | |
aa458d17 TW |
985 | rcu_read_unlock(); |
986 | ||
4797938c | 987 | /* channel(_type) changes are handled by ieee80211_hw_config */ |
094d05dc | 988 | local->oper_channel_type = NL80211_CHAN_NO_HT; |
e0cb686f | 989 | |
a8302de9 VT |
990 | local->power_constr_level = 0; |
991 | ||
520eb820 KV |
992 | del_timer_sync(&local->dynamic_ps_timer); |
993 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
994 | ||
e0cb686f KV |
995 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
996 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
997 | config_changed |= IEEE80211_CONF_CHANGE_PS; | |
998 | } | |
ae5eb026 | 999 | |
e0cb686f | 1000 | ieee80211_hw_config(local, config_changed); |
ae5eb026 | 1001 | ieee80211_bss_info_change_notify(sdata, changed); |
8e268e47 TW |
1002 | |
1003 | rcu_read_lock(); | |
1004 | ||
1005 | sta = sta_info_get(local, ifsta->bssid); | |
1006 | if (!sta) { | |
1007 | rcu_read_unlock(); | |
1008 | return; | |
1009 | } | |
1010 | ||
1011 | sta_info_unlink(&sta); | |
1012 | ||
1013 | rcu_read_unlock(); | |
1014 | ||
1015 | sta_info_destroy(sta); | |
aa458d17 | 1016 | } |
f0706e82 | 1017 | |
9ac19a90 JB |
1018 | static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata) |
1019 | { | |
1020 | if (!sdata || !sdata->default_key || | |
1021 | sdata->default_key->conf.alg != ALG_WEP) | |
1022 | return 0; | |
1023 | return 1; | |
1024 | } | |
1025 | ||
f698d856 | 1026 | static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1027 | struct ieee80211_if_sta *ifsta) |
1028 | { | |
f698d856 | 1029 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 1030 | struct ieee80211_bss *bss; |
5b98b1f7 JB |
1031 | int bss_privacy; |
1032 | int wep_privacy; | |
1033 | int privacy_invoked; | |
f0706e82 | 1034 | |
5b98b1f7 | 1035 | if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL)) |
f0706e82 JB |
1036 | return 0; |
1037 | ||
f698d856 | 1038 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
8318d78a | 1039 | local->hw.conf.channel->center_freq, |
cffdd30d | 1040 | ifsta->ssid, ifsta->ssid_len); |
f0706e82 JB |
1041 | if (!bss) |
1042 | return 0; | |
1043 | ||
00d3f14c | 1044 | bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY); |
f698d856 | 1045 | wep_privacy = !!ieee80211_sta_wep_configured(sdata); |
5b98b1f7 | 1046 | privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED); |
f0706e82 | 1047 | |
3e122be0 | 1048 | ieee80211_rx_bss_put(local, bss); |
f0706e82 | 1049 | |
5b98b1f7 JB |
1050 | if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked)) |
1051 | return 0; | |
1052 | ||
1053 | return 1; | |
f0706e82 JB |
1054 | } |
1055 | ||
f698d856 | 1056 | static void ieee80211_associate(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1057 | struct ieee80211_if_sta *ifsta) |
1058 | { | |
1059 | ifsta->assoc_tries++; | |
1060 | if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) { | |
0c68ae26 | 1061 | printk(KERN_DEBUG "%s: association with AP %pM" |
f0706e82 | 1062 | " timed out\n", |
0c68ae26 | 1063 | sdata->dev->name, ifsta->bssid); |
48c2fc59 | 1064 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
4a68ec53 | 1065 | ieee80211_sta_send_apinfo(sdata, ifsta); |
7a947080 VT |
1066 | ieee80211_rx_bss_remove(sdata, ifsta->bssid, |
1067 | sdata->local->hw.conf.channel->center_freq, | |
1068 | ifsta->ssid, ifsta->ssid_len); | |
f0706e82 JB |
1069 | return; |
1070 | } | |
1071 | ||
48c2fc59 | 1072 | ifsta->state = IEEE80211_STA_MLME_ASSOCIATE; |
0c68ae26 JB |
1073 | printk(KERN_DEBUG "%s: associate with AP %pM\n", |
1074 | sdata->dev->name, ifsta->bssid); | |
f698d856 | 1075 | if (ieee80211_privacy_mismatch(sdata, ifsta)) { |
f0706e82 | 1076 | printk(KERN_DEBUG "%s: mismatch in privacy configuration and " |
f698d856 | 1077 | "mixed-cell disabled - abort association\n", sdata->dev->name); |
48c2fc59 | 1078 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
f0706e82 JB |
1079 | return; |
1080 | } | |
1081 | ||
f698d856 | 1082 | ieee80211_send_assoc(sdata, ifsta); |
f0706e82 JB |
1083 | |
1084 | mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT); | |
1085 | } | |
1086 | ||
1087 | ||
f698d856 | 1088 | static void ieee80211_associated(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1089 | struct ieee80211_if_sta *ifsta) |
1090 | { | |
f698d856 | 1091 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1092 | struct sta_info *sta; |
1093 | int disassoc; | |
1094 | ||
1095 | /* TODO: start monitoring current AP signal quality and number of | |
1096 | * missed beacons. Scan other channels every now and then and search | |
1097 | * for better APs. */ | |
1098 | /* TODO: remove expired BSSes */ | |
1099 | ||
48c2fc59 | 1100 | ifsta->state = IEEE80211_STA_MLME_ASSOCIATED; |
f0706e82 | 1101 | |
d0709a65 JB |
1102 | rcu_read_lock(); |
1103 | ||
f0706e82 JB |
1104 | sta = sta_info_get(local, ifsta->bssid); |
1105 | if (!sta) { | |
0c68ae26 JB |
1106 | printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n", |
1107 | sdata->dev->name, ifsta->bssid); | |
f0706e82 JB |
1108 | disassoc = 1; |
1109 | } else { | |
1110 | disassoc = 0; | |
1111 | if (time_after(jiffies, | |
1112 | sta->last_rx + IEEE80211_MONITORING_INTERVAL)) { | |
d6f2da5b | 1113 | if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) { |
f0706e82 | 1114 | printk(KERN_DEBUG "%s: No ProbeResp from " |
0c68ae26 | 1115 | "current AP %pM - assume out of " |
f0706e82 | 1116 | "range\n", |
0c68ae26 | 1117 | sdata->dev->name, ifsta->bssid); |
f0706e82 | 1118 | disassoc = 1; |
d6f2da5b | 1119 | } else |
f698d856 | 1120 | ieee80211_send_probe_req(sdata, ifsta->bssid, |
4dfe51e1 JB |
1121 | ifsta->ssid, |
1122 | ifsta->ssid_len); | |
d6f2da5b | 1123 | ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL; |
f0706e82 | 1124 | } else { |
d6f2da5b | 1125 | ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL; |
f0706e82 JB |
1126 | if (time_after(jiffies, ifsta->last_probe + |
1127 | IEEE80211_PROBE_INTERVAL)) { | |
1128 | ifsta->last_probe = jiffies; | |
f698d856 | 1129 | ieee80211_send_probe_req(sdata, ifsta->bssid, |
f0706e82 JB |
1130 | ifsta->ssid, |
1131 | ifsta->ssid_len); | |
1132 | } | |
1133 | } | |
f0706e82 | 1134 | } |
d0709a65 JB |
1135 | |
1136 | rcu_read_unlock(); | |
1137 | ||
7a947080 | 1138 | if (disassoc) |
60f8b39c JB |
1139 | ieee80211_set_disassoc(sdata, ifsta, true, true, |
1140 | WLAN_REASON_PREV_AUTH_NOT_VALID); | |
7a947080 | 1141 | else |
60f8b39c JB |
1142 | mod_timer(&ifsta->timer, jiffies + |
1143 | IEEE80211_MONITORING_INTERVAL); | |
f0706e82 JB |
1144 | } |
1145 | ||
1146 | ||
f698d856 | 1147 | static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1148 | struct ieee80211_if_sta *ifsta) |
1149 | { | |
f698d856 | 1150 | printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name); |
d6f2da5b | 1151 | ifsta->flags |= IEEE80211_STA_AUTHENTICATED; |
f698d856 | 1152 | ieee80211_associate(sdata, ifsta); |
f0706e82 JB |
1153 | } |
1154 | ||
1155 | ||
f698d856 | 1156 | static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1157 | struct ieee80211_if_sta *ifsta, |
1158 | struct ieee80211_mgmt *mgmt, | |
1159 | size_t len) | |
1160 | { | |
1161 | u8 *pos; | |
1162 | struct ieee802_11_elems elems; | |
1163 | ||
f0706e82 | 1164 | pos = mgmt->u.auth.variable; |
67a4cce4 | 1165 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
f4ea83dd | 1166 | if (!elems.challenge) |
f0706e82 | 1167 | return; |
f698d856 | 1168 | ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2, |
f0706e82 JB |
1169 | elems.challenge_len + 2, 1); |
1170 | } | |
1171 | ||
f698d856 | 1172 | static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1173 | struct ieee80211_if_sta *ifsta, |
1174 | struct ieee80211_mgmt *mgmt, | |
1175 | size_t len) | |
1176 | { | |
f0706e82 JB |
1177 | u16 auth_alg, auth_transaction, status_code; |
1178 | ||
48c2fc59 | 1179 | if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE && |
05c914fe | 1180 | sdata->vif.type != NL80211_IFTYPE_ADHOC) |
f0706e82 | 1181 | return; |
f0706e82 | 1182 | |
f4ea83dd | 1183 | if (len < 24 + 6) |
f0706e82 | 1184 | return; |
f0706e82 | 1185 | |
05c914fe | 1186 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC && |
f4ea83dd | 1187 | memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1188 | return; |
f0706e82 | 1189 | |
05c914fe | 1190 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC && |
f4ea83dd | 1191 | memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) |
f0706e82 | 1192 | return; |
f0706e82 JB |
1193 | |
1194 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
1195 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
1196 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
1197 | ||
05c914fe | 1198 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
135a2110 JB |
1199 | /* |
1200 | * IEEE 802.11 standard does not require authentication in IBSS | |
f0706e82 JB |
1201 | * networks and most implementations do not seem to use it. |
1202 | * However, try to reply to authentication attempts if someone | |
1203 | * has actually implemented this. | |
135a2110 | 1204 | */ |
f4ea83dd | 1205 | if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) |
f0706e82 | 1206 | return; |
f698d856 | 1207 | ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0); |
a71800f3 | 1208 | return; |
f0706e82 JB |
1209 | } |
1210 | ||
1211 | if (auth_alg != ifsta->auth_alg || | |
f4ea83dd | 1212 | auth_transaction != ifsta->auth_transaction) |
f0706e82 | 1213 | return; |
f0706e82 JB |
1214 | |
1215 | if (status_code != WLAN_STATUS_SUCCESS) { | |
f0706e82 JB |
1216 | if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) { |
1217 | u8 algs[3]; | |
1218 | const int num_algs = ARRAY_SIZE(algs); | |
1219 | int i, pos; | |
1220 | algs[0] = algs[1] = algs[2] = 0xff; | |
1221 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
1222 | algs[0] = WLAN_AUTH_OPEN; | |
1223 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
1224 | algs[1] = WLAN_AUTH_SHARED_KEY; | |
1225 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
1226 | algs[2] = WLAN_AUTH_LEAP; | |
1227 | if (ifsta->auth_alg == WLAN_AUTH_OPEN) | |
1228 | pos = 0; | |
1229 | else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY) | |
1230 | pos = 1; | |
1231 | else | |
1232 | pos = 2; | |
1233 | for (i = 0; i < num_algs; i++) { | |
1234 | pos++; | |
1235 | if (pos >= num_algs) | |
1236 | pos = 0; | |
1237 | if (algs[pos] == ifsta->auth_alg || | |
1238 | algs[pos] == 0xff) | |
1239 | continue; | |
1240 | if (algs[pos] == WLAN_AUTH_SHARED_KEY && | |
f698d856 | 1241 | !ieee80211_sta_wep_configured(sdata)) |
f0706e82 JB |
1242 | continue; |
1243 | ifsta->auth_alg = algs[pos]; | |
f0706e82 JB |
1244 | break; |
1245 | } | |
1246 | } | |
1247 | return; | |
1248 | } | |
1249 | ||
1250 | switch (ifsta->auth_alg) { | |
1251 | case WLAN_AUTH_OPEN: | |
1252 | case WLAN_AUTH_LEAP: | |
f698d856 | 1253 | ieee80211_auth_completed(sdata, ifsta); |
f0706e82 JB |
1254 | break; |
1255 | case WLAN_AUTH_SHARED_KEY: | |
1256 | if (ifsta->auth_transaction == 4) | |
f698d856 | 1257 | ieee80211_auth_completed(sdata, ifsta); |
f0706e82 | 1258 | else |
f698d856 | 1259 | ieee80211_auth_challenge(sdata, ifsta, mgmt, len); |
f0706e82 JB |
1260 | break; |
1261 | } | |
1262 | } | |
1263 | ||
1264 | ||
f698d856 | 1265 | static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1266 | struct ieee80211_if_sta *ifsta, |
1267 | struct ieee80211_mgmt *mgmt, | |
1268 | size_t len) | |
1269 | { | |
1270 | u16 reason_code; | |
1271 | ||
f4ea83dd | 1272 | if (len < 24 + 2) |
f0706e82 | 1273 | return; |
f0706e82 | 1274 | |
f4ea83dd | 1275 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1276 | return; |
f0706e82 JB |
1277 | |
1278 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
1279 | ||
988c0f72 | 1280 | if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) |
97c8b013 ZY |
1281 | printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n", |
1282 | sdata->dev->name, reason_code); | |
f0706e82 | 1283 | |
48c2fc59 TW |
1284 | if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE || |
1285 | ifsta->state == IEEE80211_STA_MLME_ASSOCIATE || | |
1286 | ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) { | |
9859b81e | 1287 | ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
f0706e82 JB |
1288 | mod_timer(&ifsta->timer, jiffies + |
1289 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1290 | } | |
1291 | ||
aa458d17 | 1292 | ieee80211_set_disassoc(sdata, ifsta, true, false, 0); |
d6f2da5b | 1293 | ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED; |
f0706e82 JB |
1294 | } |
1295 | ||
1296 | ||
f698d856 | 1297 | static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1298 | struct ieee80211_if_sta *ifsta, |
1299 | struct ieee80211_mgmt *mgmt, | |
1300 | size_t len) | |
1301 | { | |
1302 | u16 reason_code; | |
1303 | ||
f4ea83dd | 1304 | if (len < 24 + 2) |
f0706e82 | 1305 | return; |
f0706e82 | 1306 | |
f4ea83dd | 1307 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1308 | return; |
f0706e82 JB |
1309 | |
1310 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
1311 | ||
d6f2da5b | 1312 | if (ifsta->flags & IEEE80211_STA_ASSOCIATED) |
97c8b013 ZY |
1313 | printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n", |
1314 | sdata->dev->name, reason_code); | |
f0706e82 | 1315 | |
48c2fc59 TW |
1316 | if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) { |
1317 | ifsta->state = IEEE80211_STA_MLME_ASSOCIATE; | |
f0706e82 JB |
1318 | mod_timer(&ifsta->timer, jiffies + |
1319 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1320 | } | |
1321 | ||
5925d976 | 1322 | ieee80211_set_disassoc(sdata, ifsta, false, false, reason_code); |
f0706e82 JB |
1323 | } |
1324 | ||
1325 | ||
471b3efd | 1326 | static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1327 | struct ieee80211_if_sta *ifsta, |
1328 | struct ieee80211_mgmt *mgmt, | |
1329 | size_t len, | |
1330 | int reassoc) | |
1331 | { | |
471b3efd | 1332 | struct ieee80211_local *local = sdata->local; |
8318d78a | 1333 | struct ieee80211_supported_band *sband; |
f0706e82 | 1334 | struct sta_info *sta; |
881d948c | 1335 | u32 rates, basic_rates; |
f0706e82 JB |
1336 | u16 capab_info, status_code, aid; |
1337 | struct ieee802_11_elems elems; | |
bda3933a | 1338 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
f0706e82 | 1339 | u8 *pos; |
ae5eb026 | 1340 | u32 changed = 0; |
f0706e82 | 1341 | int i, j; |
ddf4ac53 | 1342 | bool have_higher_than_11mbit = false, newsta = false; |
ae5eb026 | 1343 | u16 ap_ht_cap_flags; |
f0706e82 JB |
1344 | |
1345 | /* AssocResp and ReassocResp have identical structure, so process both | |
1346 | * of them in this function. */ | |
1347 | ||
48c2fc59 | 1348 | if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE) |
f0706e82 | 1349 | return; |
f0706e82 | 1350 | |
f4ea83dd | 1351 | if (len < 24 + 6) |
f0706e82 | 1352 | return; |
f0706e82 | 1353 | |
f4ea83dd | 1354 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1355 | return; |
f0706e82 JB |
1356 | |
1357 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
1358 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
1359 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
f0706e82 | 1360 | |
0c68ae26 | 1361 | printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x " |
f0706e82 | 1362 | "status=%d aid=%d)\n", |
0c68ae26 | 1363 | sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa, |
ddd68587 | 1364 | capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); |
f0706e82 | 1365 | |
63a5ab82 JM |
1366 | pos = mgmt->u.assoc_resp.variable; |
1367 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
1368 | ||
1369 | if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && | |
f797eb7e JM |
1370 | elems.timeout_int && elems.timeout_int_len == 5 && |
1371 | elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) { | |
63a5ab82 | 1372 | u32 tu, ms; |
f797eb7e | 1373 | tu = get_unaligned_le32(elems.timeout_int + 1); |
63a5ab82 JM |
1374 | ms = tu * 1024 / 1000; |
1375 | printk(KERN_DEBUG "%s: AP rejected association temporarily; " | |
1376 | "comeback duration %u TU (%u ms)\n", | |
1377 | sdata->dev->name, tu, ms); | |
1378 | if (ms > IEEE80211_ASSOC_TIMEOUT) | |
1379 | mod_timer(&ifsta->timer, | |
1380 | jiffies + msecs_to_jiffies(ms)); | |
1381 | return; | |
1382 | } | |
1383 | ||
f0706e82 JB |
1384 | if (status_code != WLAN_STATUS_SUCCESS) { |
1385 | printk(KERN_DEBUG "%s: AP denied association (code=%d)\n", | |
f698d856 | 1386 | sdata->dev->name, status_code); |
8a69aa93 DD |
1387 | /* if this was a reassociation, ensure we try a "full" |
1388 | * association next time. This works around some broken APs | |
1389 | * which do not correctly reject reassociation requests. */ | |
d6f2da5b | 1390 | ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
f0706e82 JB |
1391 | return; |
1392 | } | |
1393 | ||
1dd84aa2 JB |
1394 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
1395 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " | |
f698d856 | 1396 | "set\n", sdata->dev->name, aid); |
1dd84aa2 JB |
1397 | aid &= ~(BIT(15) | BIT(14)); |
1398 | ||
f0706e82 JB |
1399 | if (!elems.supp_rates) { |
1400 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", | |
f698d856 | 1401 | sdata->dev->name); |
f0706e82 JB |
1402 | return; |
1403 | } | |
1404 | ||
f698d856 | 1405 | printk(KERN_DEBUG "%s: associated\n", sdata->dev->name); |
f0706e82 JB |
1406 | ifsta->aid = aid; |
1407 | ifsta->ap_capab = capab_info; | |
1408 | ||
1409 | kfree(ifsta->assocresp_ies); | |
1410 | ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt); | |
0ec0b7ac | 1411 | ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL); |
f0706e82 JB |
1412 | if (ifsta->assocresp_ies) |
1413 | memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len); | |
1414 | ||
d0709a65 JB |
1415 | rcu_read_lock(); |
1416 | ||
f0706e82 JB |
1417 | /* Add STA entry for the AP */ |
1418 | sta = sta_info_get(local, ifsta->bssid); | |
1419 | if (!sta) { | |
ddf4ac53 | 1420 | newsta = true; |
d0709a65 | 1421 | |
73651ee6 JB |
1422 | sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC); |
1423 | if (!sta) { | |
1424 | printk(KERN_DEBUG "%s: failed to alloc STA entry for" | |
f698d856 | 1425 | " the AP\n", sdata->dev->name); |
d0709a65 | 1426 | rcu_read_unlock(); |
f0706e82 JB |
1427 | return; |
1428 | } | |
f709fc69 | 1429 | |
60f8b39c JB |
1430 | /* update new sta with its last rx activity */ |
1431 | sta->last_rx = jiffies; | |
f709fc69 | 1432 | } |
f709fc69 | 1433 | |
60f8b39c JB |
1434 | /* |
1435 | * FIXME: Do we really need to update the sta_info's information here? | |
1436 | * We already know about the AP (we found it in our list) so it | |
1437 | * should already be filled with the right info, no? | |
1438 | * As is stands, all this is racy because typically we assume | |
1439 | * the information that is filled in here (except flags) doesn't | |
1440 | * change while a STA structure is alive. As such, it should move | |
1441 | * to between the sta_info_alloc() and sta_info_insert() above. | |
1442 | */ | |
f709fc69 | 1443 | |
60f8b39c JB |
1444 | set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP | |
1445 | WLAN_STA_AUTHORIZED); | |
05e5e883 | 1446 | |
60f8b39c JB |
1447 | rates = 0; |
1448 | basic_rates = 0; | |
1449 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
f709fc69 | 1450 | |
60f8b39c JB |
1451 | for (i = 0; i < elems.supp_rates_len; i++) { |
1452 | int rate = (elems.supp_rates[i] & 0x7f) * 5; | |
d61272cb | 1453 | bool is_basic = !!(elems.supp_rates[i] & 0x80); |
f709fc69 | 1454 | |
60f8b39c JB |
1455 | if (rate > 110) |
1456 | have_higher_than_11mbit = true; | |
1457 | ||
1458 | for (j = 0; j < sband->n_bitrates; j++) { | |
d61272cb | 1459 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1460 | rates |= BIT(j); |
d61272cb TW |
1461 | if (is_basic) |
1462 | basic_rates |= BIT(j); | |
1463 | break; | |
1464 | } | |
f709fc69 | 1465 | } |
f709fc69 LCC |
1466 | } |
1467 | ||
60f8b39c JB |
1468 | for (i = 0; i < elems.ext_supp_rates_len; i++) { |
1469 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; | |
d61272cb | 1470 | bool is_basic = !!(elems.supp_rates[i] & 0x80); |
f0706e82 | 1471 | |
60f8b39c JB |
1472 | if (rate > 110) |
1473 | have_higher_than_11mbit = true; | |
f0706e82 | 1474 | |
60f8b39c | 1475 | for (j = 0; j < sband->n_bitrates; j++) { |
d61272cb | 1476 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1477 | rates |= BIT(j); |
d61272cb TW |
1478 | if (is_basic) |
1479 | basic_rates |= BIT(j); | |
1480 | break; | |
1481 | } | |
60f8b39c | 1482 | } |
1ebebea8 | 1483 | } |
f0706e82 | 1484 | |
323ce79a | 1485 | sta->sta.supp_rates[local->hw.conf.channel->band] = rates; |
bda3933a | 1486 | sdata->vif.bss_conf.basic_rates = basic_rates; |
60f8b39c JB |
1487 | |
1488 | /* cf. IEEE 802.11 9.2.12 */ | |
1489 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
1490 | have_higher_than_11mbit) | |
1491 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
1492 | else | |
1493 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
f0706e82 | 1494 | |
ae5eb026 JB |
1495 | if (elems.ht_cap_elem) |
1496 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, | |
d9fe60de | 1497 | elems.ht_cap_elem, &sta->sta.ht_cap); |
ae5eb026 JB |
1498 | |
1499 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
f0706e82 | 1500 | |
4b7679a5 | 1501 | rate_control_rate_init(sta); |
f0706e82 | 1502 | |
5394af4d JM |
1503 | if (ifsta->flags & IEEE80211_STA_MFP_ENABLED) |
1504 | set_sta_flags(sta, WLAN_STA_MFP); | |
1505 | ||
ddf4ac53 | 1506 | if (elems.wmm_param) |
60f8b39c | 1507 | set_sta_flags(sta, WLAN_STA_WME); |
ddf4ac53 JB |
1508 | |
1509 | if (newsta) { | |
1510 | int err = sta_info_insert(sta); | |
1511 | if (err) { | |
1512 | printk(KERN_DEBUG "%s: failed to insert STA entry for" | |
1513 | " the AP (error %d)\n", sdata->dev->name, err); | |
1514 | rcu_read_unlock(); | |
1515 | return; | |
1516 | } | |
1517 | } | |
1518 | ||
1519 | rcu_read_unlock(); | |
1520 | ||
1521 | if (elems.wmm_param) | |
60f8b39c JB |
1522 | ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param, |
1523 | elems.wmm_param_len); | |
f0706e82 | 1524 | |
ae5eb026 JB |
1525 | if (elems.ht_info_elem && elems.wmm_param && |
1526 | (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) | |
1527 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, | |
1528 | ap_ht_cap_flags); | |
1529 | ||
60f8b39c JB |
1530 | /* set AID and assoc capability, |
1531 | * ieee80211_set_associated() will tell the driver */ | |
1532 | bss_conf->aid = aid; | |
1533 | bss_conf->assoc_capability = capab_info; | |
ae5eb026 | 1534 | ieee80211_set_associated(sdata, ifsta, changed); |
f0706e82 | 1535 | |
60f8b39c | 1536 | ieee80211_associated(sdata, ifsta); |
f0706e82 JB |
1537 | } |
1538 | ||
1539 | ||
99cf5f5f JB |
1540 | static int __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, |
1541 | struct ieee80211_if_sta *ifsta, | |
1542 | const u8 *bssid, const int beacon_int, | |
1543 | const int freq, | |
1544 | const size_t supp_rates_len, | |
1545 | const u8 *supp_rates, | |
1546 | const u16 capability) | |
a607268a | 1547 | { |
f698d856 | 1548 | struct ieee80211_local *local = sdata->local; |
c4e3a584 | 1549 | int res = 0, rates, i, j; |
a607268a BR |
1550 | struct sk_buff *skb; |
1551 | struct ieee80211_mgmt *mgmt; | |
a607268a | 1552 | u8 *pos; |
a607268a | 1553 | struct ieee80211_supported_band *sband; |
507b06d0 | 1554 | union iwreq_data wrqu; |
a607268a | 1555 | |
c4e3a584 AF |
1556 | if (local->ops->reset_tsf) { |
1557 | /* Reset own TSF to allow time synchronization work. */ | |
1558 | local->ops->reset_tsf(local_to_hw(local)); | |
1559 | } | |
1560 | ||
1561 | if ((ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) && | |
99cf5f5f | 1562 | memcmp(ifsta->bssid, bssid, ETH_ALEN) == 0) |
c4e3a584 AF |
1563 | return res; |
1564 | ||
9aed3cc1 JM |
1565 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400 + |
1566 | sdata->u.sta.ie_proberesp_len); | |
e2ef12d3 RR |
1567 | if (!skb) { |
1568 | printk(KERN_DEBUG "%s: failed to allocate buffer for probe " | |
1569 | "response\n", sdata->dev->name); | |
1570 | return -ENOMEM; | |
1571 | } | |
1572 | ||
c4e3a584 AF |
1573 | if (!(ifsta->flags & IEEE80211_STA_PREV_BSSID_SET)) { |
1574 | /* Remove possible STA entries from other IBSS networks. */ | |
1575 | sta_info_flush_delayed(sdata); | |
a607268a | 1576 | } |
c4e3a584 | 1577 | |
99cf5f5f | 1578 | memcpy(ifsta->bssid, bssid, ETH_ALEN); |
9d139c81 | 1579 | res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID); |
a607268a BR |
1580 | if (res) |
1581 | return res; | |
1582 | ||
99cf5f5f | 1583 | local->hw.conf.beacon_int = beacon_int >= 10 ? beacon_int : 10; |
a607268a | 1584 | |
99cf5f5f | 1585 | sdata->drop_unencrypted = capability & |
a607268a BR |
1586 | WLAN_CAPABILITY_PRIVACY ? 1 : 0; |
1587 | ||
99cf5f5f | 1588 | res = ieee80211_set_freq(sdata, freq); |
a607268a | 1589 | |
be038b37 AK |
1590 | if (res) |
1591 | return res; | |
a607268a | 1592 | |
99cf5f5f JB |
1593 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
1594 | ||
9d139c81 | 1595 | /* Build IBSS probe response */ |
a607268a | 1596 | |
e2ef12d3 | 1597 | skb_reserve(skb, local->hw.extra_tx_headroom); |
a607268a | 1598 | |
e2ef12d3 RR |
1599 | mgmt = (struct ieee80211_mgmt *) |
1600 | skb_put(skb, 24 + sizeof(mgmt->u.beacon)); | |
1601 | memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon)); | |
1602 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
99cf5f5f | 1603 | IEEE80211_STYPE_PROBE_RESP); |
e2ef12d3 RR |
1604 | memset(mgmt->da, 0xff, ETH_ALEN); |
1605 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); | |
1606 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
1607 | mgmt->u.beacon.beacon_int = | |
1608 | cpu_to_le16(local->hw.conf.beacon_int); | |
99cf5f5f | 1609 | mgmt->u.beacon.capab_info = cpu_to_le16(capability); |
a607268a | 1610 | |
e2ef12d3 RR |
1611 | pos = skb_put(skb, 2 + ifsta->ssid_len); |
1612 | *pos++ = WLAN_EID_SSID; | |
1613 | *pos++ = ifsta->ssid_len; | |
1614 | memcpy(pos, ifsta->ssid, ifsta->ssid_len); | |
a607268a | 1615 | |
99cf5f5f | 1616 | rates = supp_rates_len; |
e2ef12d3 RR |
1617 | if (rates > 8) |
1618 | rates = 8; | |
1619 | pos = skb_put(skb, 2 + rates); | |
1620 | *pos++ = WLAN_EID_SUPP_RATES; | |
1621 | *pos++ = rates; | |
99cf5f5f | 1622 | memcpy(pos, supp_rates, rates); |
e2ef12d3 | 1623 | |
99cf5f5f | 1624 | if (sband->band == IEEE80211_BAND_2GHZ) { |
e2ef12d3 RR |
1625 | pos = skb_put(skb, 2 + 1); |
1626 | *pos++ = WLAN_EID_DS_PARAMS; | |
1627 | *pos++ = 1; | |
99cf5f5f | 1628 | *pos++ = ieee80211_frequency_to_channel(freq); |
e2ef12d3 | 1629 | } |
a607268a | 1630 | |
e2ef12d3 RR |
1631 | pos = skb_put(skb, 2 + 2); |
1632 | *pos++ = WLAN_EID_IBSS_PARAMS; | |
1633 | *pos++ = 2; | |
1634 | /* FIX: set ATIM window based on scan results */ | |
1635 | *pos++ = 0; | |
1636 | *pos++ = 0; | |
e039fa4a | 1637 | |
99cf5f5f JB |
1638 | if (supp_rates_len > 8) { |
1639 | rates = supp_rates_len - 8; | |
e2ef12d3 RR |
1640 | pos = skb_put(skb, 2 + rates); |
1641 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
1642 | *pos++ = rates; | |
99cf5f5f | 1643 | memcpy(pos, &supp_rates[8], rates); |
9d139c81 | 1644 | } |
a607268a | 1645 | |
9aed3cc1 JM |
1646 | add_extra_ies(skb, sdata->u.sta.ie_proberesp, |
1647 | sdata->u.sta.ie_proberesp_len); | |
1648 | ||
e2ef12d3 RR |
1649 | ifsta->probe_resp = skb; |
1650 | ||
078e1e60 JB |
1651 | ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON | |
1652 | IEEE80211_IFCC_BEACON_ENABLED); | |
e2ef12d3 RR |
1653 | |
1654 | ||
9d139c81 | 1655 | rates = 0; |
99cf5f5f JB |
1656 | for (i = 0; i < supp_rates_len; i++) { |
1657 | int bitrate = (supp_rates[i] & 0x7f) * 5; | |
9d139c81 JB |
1658 | for (j = 0; j < sband->n_bitrates; j++) |
1659 | if (sband->bitrates[j].bitrate == bitrate) | |
1660 | rates |= BIT(j); | |
a607268a | 1661 | } |
9d139c81 JB |
1662 | ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates; |
1663 | ||
99cf5f5f | 1664 | ieee80211_sta_def_wmm_params(sdata, supp_rates_len, supp_rates); |
a607268a | 1665 | |
dfe67012 | 1666 | ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET; |
48c2fc59 | 1667 | ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED; |
a607268a BR |
1668 | mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); |
1669 | ||
4492bea6 EG |
1670 | ieee80211_led_assoc(local, true); |
1671 | ||
507b06d0 | 1672 | memset(&wrqu, 0, sizeof(wrqu)); |
99cf5f5f | 1673 | memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN); |
f698d856 | 1674 | wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL); |
a607268a BR |
1675 | |
1676 | return res; | |
1677 | } | |
1678 | ||
99cf5f5f JB |
1679 | static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, |
1680 | struct ieee80211_if_sta *ifsta, | |
1681 | struct ieee80211_bss *bss) | |
1682 | { | |
1683 | return __ieee80211_sta_join_ibss(sdata, ifsta, | |
00d3f14c JB |
1684 | bss->cbss.bssid, |
1685 | bss->cbss.beacon_interval, | |
1686 | bss->cbss.channel->center_freq, | |
99cf5f5f | 1687 | bss->supp_rates_len, bss->supp_rates, |
00d3f14c | 1688 | bss->cbss.capability); |
99cf5f5f JB |
1689 | } |
1690 | ||
98c8fccf JB |
1691 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
1692 | struct ieee80211_mgmt *mgmt, | |
1693 | size_t len, | |
1694 | struct ieee80211_rx_status *rx_status, | |
1695 | struct ieee802_11_elems *elems, | |
1696 | bool beacon) | |
1697 | { | |
1698 | struct ieee80211_local *local = sdata->local; | |
1699 | int freq; | |
c2b13452 | 1700 | struct ieee80211_bss *bss; |
98c8fccf JB |
1701 | struct sta_info *sta; |
1702 | struct ieee80211_channel *channel; | |
1703 | u64 beacon_timestamp, rx_timestamp; | |
881d948c | 1704 | u32 supp_rates = 0; |
98c8fccf | 1705 | enum ieee80211_band band = rx_status->band; |
98c8fccf JB |
1706 | |
1707 | if (elems->ds_params && elems->ds_params_len == 1) | |
1708 | freq = ieee80211_channel_to_frequency(elems->ds_params[0]); | |
1709 | else | |
1710 | freq = rx_status->freq; | |
1711 | ||
1712 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
1713 | ||
1714 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
1715 | return; | |
1716 | ||
05c914fe | 1717 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && elems->supp_rates && |
98c8fccf JB |
1718 | memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) { |
1719 | supp_rates = ieee80211_sta_get_rates(local, elems, band); | |
1720 | ||
1721 | rcu_read_lock(); | |
1722 | ||
1723 | sta = sta_info_get(local, mgmt->sa); | |
1724 | if (sta) { | |
881d948c | 1725 | u32 prev_rates; |
98c8fccf | 1726 | |
323ce79a | 1727 | prev_rates = sta->sta.supp_rates[band]; |
98c8fccf | 1728 | /* make sure mandatory rates are always added */ |
323ce79a | 1729 | sta->sta.supp_rates[band] = supp_rates | |
96dd22ac | 1730 | ieee80211_mandatory_rates(local, band); |
98c8fccf JB |
1731 | |
1732 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
323ce79a | 1733 | if (sta->sta.supp_rates[band] != prev_rates) |
98c8fccf | 1734 | printk(KERN_DEBUG "%s: updated supp_rates set " |
0c68ae26 | 1735 | "for %pM based on beacon info (0x%llx | " |
98c8fccf | 1736 | "0x%llx -> 0x%llx)\n", |
17741cdc | 1737 | sdata->dev->name, |
0c68ae26 | 1738 | sta->sta.addr, |
98c8fccf JB |
1739 | (unsigned long long) prev_rates, |
1740 | (unsigned long long) supp_rates, | |
323ce79a | 1741 | (unsigned long long) sta->sta.supp_rates[band]); |
98c8fccf JB |
1742 | #endif |
1743 | } else { | |
ab1f5c0b | 1744 | ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates); |
98c8fccf JB |
1745 | } |
1746 | ||
1747 | rcu_read_unlock(); | |
1748 | } | |
1749 | ||
1750 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, | |
2a519311 | 1751 | channel, beacon); |
98c8fccf JB |
1752 | if (!bss) |
1753 | return; | |
1754 | ||
c481ec97 S |
1755 | if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) && |
1756 | (memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0)) { | |
1757 | struct ieee80211_channel_sw_ie *sw_elem = | |
1758 | (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem; | |
1759 | ieee80211_process_chanswitch(sdata, sw_elem, bss); | |
1760 | } | |
1761 | ||
98c8fccf | 1762 | /* was just updated in ieee80211_bss_info_update */ |
00d3f14c | 1763 | beacon_timestamp = bss->cbss.tsf; |
98c8fccf | 1764 | |
30b89b0f JB |
1765 | /* |
1766 | * In STA mode, the remaining parameters should not be overridden | |
1767 | * by beacons because they're not necessarily accurate there. | |
1768 | */ | |
05c914fe | 1769 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC && |
9859b81e | 1770 | bss->last_probe_resp && beacon) { |
3e122be0 | 1771 | ieee80211_rx_bss_put(local, bss); |
30b89b0f JB |
1772 | return; |
1773 | } | |
1774 | ||
9d9bf77d | 1775 | /* check if we need to merge IBSS */ |
05c914fe | 1776 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && beacon && |
65f0e6a3 | 1777 | (!(sdata->u.sta.flags & IEEE80211_STA_BSSID_SET)) && |
00d3f14c JB |
1778 | bss->cbss.capability & WLAN_CAPABILITY_IBSS && |
1779 | bss->cbss.channel == local->oper_channel && | |
ae6a44e3 EK |
1780 | elems->ssid_len == sdata->u.sta.ssid_len && |
1781 | memcmp(elems->ssid, sdata->u.sta.ssid, | |
1782 | sdata->u.sta.ssid_len) == 0) { | |
9d9bf77d BR |
1783 | if (rx_status->flag & RX_FLAG_TSFT) { |
1784 | /* in order for correct IBSS merging we need mactime | |
1785 | * | |
1786 | * since mactime is defined as the time the first data | |
1787 | * symbol of the frame hits the PHY, and the timestamp | |
1788 | * of the beacon is defined as "the time that the data | |
1789 | * symbol containing the first bit of the timestamp is | |
1790 | * transmitted to the PHY plus the transmitting STA’s | |
1791 | * delays through its local PHY from the MAC-PHY | |
1792 | * interface to its interface with the WM" | |
1793 | * (802.11 11.1.2) - equals the time this bit arrives at | |
1794 | * the receiver - we have to take into account the | |
1795 | * offset between the two. | |
1796 | * e.g: at 1 MBit that means mactime is 192 usec earlier | |
1797 | * (=24 bytes * 8 usecs/byte) than the beacon timestamp. | |
1798 | */ | |
0fb8ca45 JM |
1799 | int rate; |
1800 | if (rx_status->flag & RX_FLAG_HT) { | |
1801 | rate = 65; /* TODO: HT rates */ | |
1802 | } else { | |
1803 | rate = local->hw.wiphy->bands[band]-> | |
9d9bf77d | 1804 | bitrates[rx_status->rate_idx].bitrate; |
0fb8ca45 | 1805 | } |
9d9bf77d BR |
1806 | rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate); |
1807 | } else if (local && local->ops && local->ops->get_tsf) | |
1808 | /* second best option: get current TSF */ | |
1809 | rx_timestamp = local->ops->get_tsf(local_to_hw(local)); | |
1810 | else | |
1811 | /* can't merge without knowing the TSF */ | |
1812 | rx_timestamp = -1LLU; | |
1813 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0c68ae26 JB |
1814 | printk(KERN_DEBUG "RX beacon SA=%pM BSSID=" |
1815 | "%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n", | |
1816 | mgmt->sa, mgmt->bssid, | |
9d9bf77d BR |
1817 | (unsigned long long)rx_timestamp, |
1818 | (unsigned long long)beacon_timestamp, | |
1819 | (unsigned long long)(rx_timestamp - beacon_timestamp), | |
1820 | jiffies); | |
1821 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
1822 | if (beacon_timestamp > rx_timestamp) { | |
576fdeae | 1823 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
f4ea83dd | 1824 | printk(KERN_DEBUG "%s: beacon TSF higher than " |
0c68ae26 JB |
1825 | "local TSF - IBSS merge with BSSID %pM\n", |
1826 | sdata->dev->name, mgmt->bssid); | |
fba4a1e6 | 1827 | #endif |
f698d856 | 1828 | ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss); |
ab1f5c0b | 1829 | ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates); |
9d9bf77d BR |
1830 | } |
1831 | } | |
1832 | ||
3e122be0 | 1833 | ieee80211_rx_bss_put(local, bss); |
f0706e82 JB |
1834 | } |
1835 | ||
1836 | ||
f698d856 | 1837 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1838 | struct ieee80211_mgmt *mgmt, |
1839 | size_t len, | |
1840 | struct ieee80211_rx_status *rx_status) | |
1841 | { | |
ae6a44e3 EK |
1842 | size_t baselen; |
1843 | struct ieee802_11_elems elems; | |
9859b81e | 1844 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
ae6a44e3 | 1845 | |
8e7cdbb6 TW |
1846 | if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN)) |
1847 | return; /* ignore ProbeResp to foreign address */ | |
1848 | ||
ae6a44e3 EK |
1849 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
1850 | if (baselen > len) | |
1851 | return; | |
1852 | ||
1853 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
1854 | &elems); | |
1855 | ||
98c8fccf | 1856 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false); |
9859b81e RR |
1857 | |
1858 | /* direct probe may be part of the association flow */ | |
1859 | if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE, | |
1860 | &ifsta->request)) { | |
1861 | printk(KERN_DEBUG "%s direct probe responded\n", | |
1862 | sdata->dev->name); | |
1863 | ieee80211_authenticate(sdata, ifsta); | |
1864 | } | |
f0706e82 JB |
1865 | } |
1866 | ||
1867 | ||
f698d856 | 1868 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1869 | struct ieee80211_mgmt *mgmt, |
1870 | size_t len, | |
1871 | struct ieee80211_rx_status *rx_status) | |
1872 | { | |
f0706e82 | 1873 | struct ieee80211_if_sta *ifsta; |
f0706e82 JB |
1874 | size_t baselen; |
1875 | struct ieee802_11_elems elems; | |
f698d856 | 1876 | struct ieee80211_local *local = sdata->local; |
471b3efd | 1877 | u32 changed = 0; |
1fb3606b | 1878 | bool erp_valid, directed_tim; |
7a5158ef | 1879 | u8 erp_value = 0; |
f0706e82 | 1880 | |
ae6a44e3 EK |
1881 | /* Process beacon from the current BSS */ |
1882 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
1883 | if (baselen > len) | |
1884 | return; | |
1885 | ||
1886 | ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems); | |
1887 | ||
98c8fccf | 1888 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true); |
f0706e82 | 1889 | |
05c914fe | 1890 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
f0706e82 JB |
1891 | return; |
1892 | ifsta = &sdata->u.sta; | |
1893 | ||
d6f2da5b | 1894 | if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) || |
f0706e82 JB |
1895 | memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) |
1896 | return; | |
1897 | ||
c481ec97 S |
1898 | if (rx_status->freq != local->hw.conf.channel->center_freq) |
1899 | return; | |
1900 | ||
fe3fa827 JB |
1901 | ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param, |
1902 | elems.wmm_param_len); | |
1903 | ||
4be8c387 JB |
1904 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK && |
1905 | local->hw.conf.flags & IEEE80211_CONF_PS) { | |
1fb3606b | 1906 | directed_tim = ieee80211_check_tim(&elems, ifsta->aid); |
a97b77b9 | 1907 | |
1fb3606b | 1908 | if (directed_tim) { |
572e0012 KV |
1909 | if (local->hw.conf.dynamic_ps_timeout > 0) { |
1910 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
1911 | ieee80211_hw_config(local, | |
1912 | IEEE80211_CONF_CHANGE_PS); | |
1913 | ieee80211_send_nullfunc(local, sdata, 0); | |
1914 | } else { | |
1915 | local->pspolling = true; | |
1916 | ||
1917 | /* | |
1918 | * Here is assumed that the driver will be | |
1919 | * able to send ps-poll frame and receive a | |
1920 | * response even though power save mode is | |
1921 | * enabled, but some drivers might require | |
1922 | * to disable power save here. This needs | |
1923 | * to be investigated. | |
1924 | */ | |
1925 | ieee80211_send_pspoll(local, sdata); | |
1926 | } | |
a97b77b9 VN |
1927 | } |
1928 | } | |
7a5158ef JB |
1929 | |
1930 | if (elems.erp_info && elems.erp_info_len >= 1) { | |
1931 | erp_valid = true; | |
1932 | erp_value = elems.erp_info[0]; | |
1933 | } else { | |
1934 | erp_valid = false; | |
50c4afb9 | 1935 | } |
7a5158ef JB |
1936 | changed |= ieee80211_handle_bss_capability(sdata, |
1937 | le16_to_cpu(mgmt->u.beacon.capab_info), | |
1938 | erp_valid, erp_value); | |
f0706e82 | 1939 | |
d3c990fb | 1940 | |
ae5eb026 JB |
1941 | if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param) { |
1942 | struct sta_info *sta; | |
1943 | struct ieee80211_supported_band *sband; | |
1944 | u16 ap_ht_cap_flags; | |
1945 | ||
1946 | rcu_read_lock(); | |
1947 | ||
1948 | sta = sta_info_get(local, ifsta->bssid); | |
1949 | if (!sta) { | |
1950 | rcu_read_unlock(); | |
1951 | return; | |
1952 | } | |
1953 | ||
1954 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1955 | ||
1956 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, | |
1957 | elems.ht_cap_elem, &sta->sta.ht_cap); | |
1958 | ||
1959 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
1960 | ||
1961 | rcu_read_unlock(); | |
1962 | ||
1963 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, | |
1964 | ap_ht_cap_flags); | |
d3c990fb RR |
1965 | } |
1966 | ||
3f2355cb LR |
1967 | if (elems.country_elem) { |
1968 | /* Note we are only reviewing this on beacons | |
1969 | * for the BSSID we are associated to */ | |
1970 | regulatory_hint_11d(local->hw.wiphy, | |
1971 | elems.country_elem, elems.country_elem_len); | |
a8302de9 VT |
1972 | |
1973 | /* TODO: IBSS also needs this */ | |
1974 | if (elems.pwr_constr_elem) | |
1975 | ieee80211_handle_pwr_constr(sdata, | |
1976 | le16_to_cpu(mgmt->u.probe_resp.capab_info), | |
1977 | elems.pwr_constr_elem, | |
1978 | elems.pwr_constr_elem_len); | |
3f2355cb LR |
1979 | } |
1980 | ||
471b3efd | 1981 | ieee80211_bss_info_change_notify(sdata, changed); |
f0706e82 JB |
1982 | } |
1983 | ||
1984 | ||
f698d856 | 1985 | static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1986 | struct ieee80211_if_sta *ifsta, |
1987 | struct ieee80211_mgmt *mgmt, | |
504a71e4 | 1988 | size_t len) |
f0706e82 | 1989 | { |
f698d856 | 1990 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1991 | int tx_last_beacon; |
1992 | struct sk_buff *skb; | |
1993 | struct ieee80211_mgmt *resp; | |
1994 | u8 *pos, *end; | |
1995 | ||
05c914fe | 1996 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC || |
48c2fc59 | 1997 | ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED || |
f0706e82 JB |
1998 | len < 24 + 2 || !ifsta->probe_resp) |
1999 | return; | |
2000 | ||
2001 | if (local->ops->tx_last_beacon) | |
2002 | tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local)); | |
2003 | else | |
2004 | tx_last_beacon = 1; | |
2005 | ||
2006 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0c68ae26 JB |
2007 | printk(KERN_DEBUG "%s: RX ProbeReq SA=%pM DA=%pM BSSID=%pM" |
2008 | " (tx_last_beacon=%d)\n", | |
2009 | sdata->dev->name, mgmt->sa, mgmt->da, | |
2010 | mgmt->bssid, tx_last_beacon); | |
f0706e82 JB |
2011 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
2012 | ||
2013 | if (!tx_last_beacon) | |
2014 | return; | |
2015 | ||
2016 | if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 && | |
2017 | memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0) | |
2018 | return; | |
2019 | ||
2020 | end = ((u8 *) mgmt) + len; | |
2021 | pos = mgmt->u.probe_req.variable; | |
2022 | if (pos[0] != WLAN_EID_SSID || | |
2023 | pos + 2 + pos[1] > end) { | |
f4ea83dd JB |
2024 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
2025 | printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq " | |
0c68ae26 JB |
2026 | "from %pM\n", |
2027 | sdata->dev->name, mgmt->sa); | |
f4ea83dd | 2028 | #endif |
f0706e82 JB |
2029 | return; |
2030 | } | |
2031 | if (pos[1] != 0 && | |
2032 | (pos[1] != ifsta->ssid_len || | |
2033 | memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) { | |
2034 | /* Ignore ProbeReq for foreign SSID */ | |
2035 | return; | |
2036 | } | |
2037 | ||
2038 | /* Reply with ProbeResp */ | |
0ec0b7ac | 2039 | skb = skb_copy(ifsta->probe_resp, GFP_KERNEL); |
f0706e82 JB |
2040 | if (!skb) |
2041 | return; | |
2042 | ||
2043 | resp = (struct ieee80211_mgmt *) skb->data; | |
2044 | memcpy(resp->da, mgmt->sa, ETH_ALEN); | |
2045 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0c68ae26 JB |
2046 | printk(KERN_DEBUG "%s: Sending ProbeResp to %pM\n", |
2047 | sdata->dev->name, resp->da); | |
f0706e82 | 2048 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
e50db65c | 2049 | ieee80211_tx_skb(sdata, skb, 0); |
f0706e82 JB |
2050 | } |
2051 | ||
f698d856 | 2052 | void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, |
f0706e82 JB |
2053 | struct ieee80211_rx_status *rx_status) |
2054 | { | |
f698d856 | 2055 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
2056 | struct ieee80211_if_sta *ifsta; |
2057 | struct ieee80211_mgmt *mgmt; | |
2058 | u16 fc; | |
2059 | ||
2060 | if (skb->len < 24) | |
2061 | goto fail; | |
2062 | ||
f0706e82 JB |
2063 | ifsta = &sdata->u.sta; |
2064 | ||
2065 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
2066 | fc = le16_to_cpu(mgmt->frame_control); | |
2067 | ||
2068 | switch (fc & IEEE80211_FCTL_STYPE) { | |
2069 | case IEEE80211_STYPE_PROBE_REQ: | |
2070 | case IEEE80211_STYPE_PROBE_RESP: | |
2071 | case IEEE80211_STYPE_BEACON: | |
2072 | memcpy(skb->cb, rx_status, sizeof(*rx_status)); | |
2073 | case IEEE80211_STYPE_AUTH: | |
2074 | case IEEE80211_STYPE_ASSOC_RESP: | |
2075 | case IEEE80211_STYPE_REASSOC_RESP: | |
2076 | case IEEE80211_STYPE_DEAUTH: | |
2077 | case IEEE80211_STYPE_DISASSOC: | |
2078 | skb_queue_tail(&ifsta->skb_queue, skb); | |
2079 | queue_work(local->hw.workqueue, &ifsta->work); | |
2080 | return; | |
f0706e82 JB |
2081 | } |
2082 | ||
2083 | fail: | |
2084 | kfree_skb(skb); | |
2085 | } | |
2086 | ||
f698d856 | 2087 | static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2088 | struct sk_buff *skb) |
2089 | { | |
2090 | struct ieee80211_rx_status *rx_status; | |
f0706e82 JB |
2091 | struct ieee80211_if_sta *ifsta; |
2092 | struct ieee80211_mgmt *mgmt; | |
2093 | u16 fc; | |
2094 | ||
f0706e82 JB |
2095 | ifsta = &sdata->u.sta; |
2096 | ||
2097 | rx_status = (struct ieee80211_rx_status *) skb->cb; | |
2098 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
2099 | fc = le16_to_cpu(mgmt->frame_control); | |
2100 | ||
2101 | switch (fc & IEEE80211_FCTL_STYPE) { | |
2102 | case IEEE80211_STYPE_PROBE_REQ: | |
504a71e4 | 2103 | ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len); |
f0706e82 JB |
2104 | break; |
2105 | case IEEE80211_STYPE_PROBE_RESP: | |
f698d856 | 2106 | ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status); |
f0706e82 JB |
2107 | break; |
2108 | case IEEE80211_STYPE_BEACON: | |
f698d856 | 2109 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); |
f0706e82 JB |
2110 | break; |
2111 | case IEEE80211_STYPE_AUTH: | |
f698d856 | 2112 | ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len); |
f0706e82 JB |
2113 | break; |
2114 | case IEEE80211_STYPE_ASSOC_RESP: | |
471b3efd | 2115 | ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0); |
f0706e82 JB |
2116 | break; |
2117 | case IEEE80211_STYPE_REASSOC_RESP: | |
471b3efd | 2118 | ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1); |
f0706e82 JB |
2119 | break; |
2120 | case IEEE80211_STYPE_DEAUTH: | |
f698d856 | 2121 | ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len); |
f0706e82 JB |
2122 | break; |
2123 | case IEEE80211_STYPE_DISASSOC: | |
f698d856 | 2124 | ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len); |
f0706e82 JB |
2125 | break; |
2126 | } | |
2127 | ||
2128 | kfree_skb(skb); | |
2129 | } | |
2130 | ||
2131 | ||
f698d856 | 2132 | static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 2133 | { |
f698d856 | 2134 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
2135 | int active = 0; |
2136 | struct sta_info *sta; | |
2137 | ||
d0709a65 JB |
2138 | rcu_read_lock(); |
2139 | ||
2140 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
2141 | if (sta->sdata == sdata && | |
f0706e82 JB |
2142 | time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL, |
2143 | jiffies)) { | |
2144 | active++; | |
2145 | break; | |
2146 | } | |
2147 | } | |
d0709a65 JB |
2148 | |
2149 | rcu_read_unlock(); | |
f0706e82 JB |
2150 | |
2151 | return active; | |
2152 | } | |
2153 | ||
2154 | ||
f698d856 | 2155 | static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2156 | struct ieee80211_if_sta *ifsta) |
2157 | { | |
2158 | mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); | |
2159 | ||
f698d856 JBG |
2160 | ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT); |
2161 | if (ieee80211_sta_active_ibss(sdata)) | |
f0706e82 JB |
2162 | return; |
2163 | ||
137f9f46 AF |
2164 | if ((sdata->u.sta.flags & IEEE80211_STA_BSSID_SET) && |
2165 | (!(sdata->u.sta.flags & IEEE80211_STA_AUTO_CHANNEL_SEL))) | |
2166 | return; | |
2167 | ||
f0706e82 | 2168 | printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other " |
f698d856 | 2169 | "IBSS networks with same SSID (merge)\n", sdata->dev->name); |
2a519311 JB |
2170 | |
2171 | /* XXX maybe racy? */ | |
2172 | if (sdata->local->scan_req) | |
2173 | return; | |
2174 | ||
2175 | memcpy(sdata->local->int_scan_req.ssids[0].ssid, | |
2176 | ifsta->ssid, IEEE80211_MAX_SSID_LEN); | |
2177 | sdata->local->int_scan_req.ssids[0].ssid_len = ifsta->ssid_len; | |
2178 | ieee80211_request_scan(sdata, &sdata->local->int_scan_req); | |
f0706e82 JB |
2179 | } |
2180 | ||
2181 | ||
9c6bd790 | 2182 | static void ieee80211_sta_timer(unsigned long data) |
f0706e82 | 2183 | { |
60f8b39c JB |
2184 | struct ieee80211_sub_if_data *sdata = |
2185 | (struct ieee80211_sub_if_data *) data; | |
2186 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
2187 | struct ieee80211_local *local = sdata->local; | |
f0706e82 | 2188 | |
60f8b39c JB |
2189 | set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); |
2190 | queue_work(local->hw.workqueue, &ifsta->work); | |
f0706e82 JB |
2191 | } |
2192 | ||
f698d856 | 2193 | static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2194 | struct ieee80211_if_sta *ifsta) |
2195 | { | |
f698d856 | 2196 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
2197 | |
2198 | if (local->ops->reset_tsf) { | |
2199 | /* Reset own TSF to allow time synchronization work. */ | |
2200 | local->ops->reset_tsf(local_to_hw(local)); | |
2201 | } | |
2202 | ||
2203 | ifsta->wmm_last_param_set = -1; /* allow any WMM update */ | |
2204 | ||
2205 | ||
2206 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
2207 | ifsta->auth_alg = WLAN_AUTH_OPEN; | |
2208 | else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
2209 | ifsta->auth_alg = WLAN_AUTH_SHARED_KEY; | |
2210 | else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
2211 | ifsta->auth_alg = WLAN_AUTH_LEAP; | |
2212 | else | |
2213 | ifsta->auth_alg = WLAN_AUTH_OPEN; | |
f0706e82 | 2214 | ifsta->auth_transaction = -1; |
d6f2da5b | 2215 | ifsta->flags &= ~IEEE80211_STA_ASSOCIATED; |
6042a3e3 | 2216 | ifsta->assoc_scan_tries = 0; |
9859b81e | 2217 | ifsta->direct_probe_tries = 0; |
6042a3e3 RR |
2218 | ifsta->auth_tries = 0; |
2219 | ifsta->assoc_tries = 0; | |
24e64622 | 2220 | netif_tx_stop_all_queues(sdata->dev); |
f698d856 | 2221 | netif_carrier_off(sdata->dev); |
f0706e82 JB |
2222 | } |
2223 | ||
f698d856 | 2224 | static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2225 | struct ieee80211_if_sta *ifsta) |
2226 | { | |
f698d856 | 2227 | struct ieee80211_local *local = sdata->local; |
8318d78a | 2228 | struct ieee80211_supported_band *sband; |
99cf5f5f JB |
2229 | u8 *pos; |
2230 | u8 bssid[ETH_ALEN]; | |
2231 | u8 supp_rates[IEEE80211_MAX_SUPP_RATES]; | |
2232 | u16 capability; | |
f0706e82 JB |
2233 | int i; |
2234 | ||
dfe67012 AF |
2235 | if (sdata->u.sta.flags & IEEE80211_STA_BSSID_SET) { |
2236 | memcpy(bssid, ifsta->bssid, ETH_ALEN); | |
2237 | } else { | |
2238 | /* Generate random, not broadcast, locally administered BSSID. Mix in | |
2239 | * own MAC address to make sure that devices that do not have proper | |
2240 | * random number generator get different BSSID. */ | |
2241 | get_random_bytes(bssid, ETH_ALEN); | |
2242 | for (i = 0; i < ETH_ALEN; i++) | |
2243 | bssid[i] ^= sdata->dev->dev_addr[i]; | |
2244 | bssid[0] &= ~0x01; | |
2245 | bssid[0] |= 0x02; | |
2246 | } | |
f0706e82 | 2247 | |
0c68ae26 JB |
2248 | printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %pM\n", |
2249 | sdata->dev->name, bssid); | |
f0706e82 | 2250 | |
99cf5f5f | 2251 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
f0706e82 JB |
2252 | |
2253 | if (local->hw.conf.beacon_int == 0) | |
dc0ae30c | 2254 | local->hw.conf.beacon_int = 100; |
99cf5f5f JB |
2255 | |
2256 | capability = WLAN_CAPABILITY_IBSS; | |
988c0f72 JB |
2257 | |
2258 | if (sdata->default_key) | |
99cf5f5f | 2259 | capability |= WLAN_CAPABILITY_PRIVACY; |
988c0f72 | 2260 | else |
f0706e82 | 2261 | sdata->drop_unencrypted = 0; |
988c0f72 | 2262 | |
99cf5f5f | 2263 | pos = supp_rates; |
8318d78a JB |
2264 | for (i = 0; i < sband->n_bitrates; i++) { |
2265 | int rate = sband->bitrates[i].bitrate; | |
f0706e82 JB |
2266 | *pos++ = (u8) (rate / 5); |
2267 | } | |
2268 | ||
99cf5f5f JB |
2269 | return __ieee80211_sta_join_ibss(sdata, ifsta, |
2270 | bssid, local->hw.conf.beacon_int, | |
2271 | local->hw.conf.channel->center_freq, | |
2272 | sband->n_bitrates, supp_rates, | |
2273 | capability); | |
f0706e82 JB |
2274 | } |
2275 | ||
2276 | ||
f698d856 | 2277 | static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2278 | struct ieee80211_if_sta *ifsta) |
2279 | { | |
f698d856 | 2280 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 2281 | struct ieee80211_bss *bss; |
f0706e82 JB |
2282 | int active_ibss; |
2283 | ||
2284 | if (ifsta->ssid_len == 0) | |
2285 | return -EINVAL; | |
2286 | ||
f698d856 | 2287 | active_ibss = ieee80211_sta_active_ibss(sdata); |
f0706e82 JB |
2288 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
2289 | printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n", | |
f698d856 | 2290 | sdata->dev->name, active_ibss); |
f0706e82 | 2291 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
00d3f14c JB |
2292 | |
2293 | if (active_ibss) | |
2294 | return 0; | |
2295 | ||
2296 | if (ifsta->flags & IEEE80211_STA_BSSID_SET) | |
2297 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, 0, | |
2298 | ifsta->ssid, ifsta->ssid_len); | |
2299 | else | |
2300 | bss = (void *)cfg80211_get_ibss(local->hw.wiphy, | |
2301 | NULL, | |
2302 | ifsta->ssid, ifsta->ssid_len); | |
f0706e82 JB |
2303 | |
2304 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
00d3f14c | 2305 | if (bss) |
0c68ae26 | 2306 | printk(KERN_DEBUG " sta_find_ibss: selected %pM current " |
00d3f14c | 2307 | "%pM\n", bss->cbss.bssid, ifsta->bssid); |
f0706e82 | 2308 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
80693ceb | 2309 | |
00d3f14c JB |
2310 | if (bss && |
2311 | (!(ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) || | |
2312 | memcmp(ifsta->bssid, bss->cbss.bssid, ETH_ALEN))) { | |
167ad6f7 | 2313 | int ret; |
80693ceb | 2314 | |
0c68ae26 | 2315 | printk(KERN_DEBUG "%s: Selected IBSS BSSID %pM" |
f0706e82 | 2316 | " based on configured SSID\n", |
00d3f14c JB |
2317 | sdata->dev->name, bss->cbss.bssid); |
2318 | ||
f698d856 | 2319 | ret = ieee80211_sta_join_ibss(sdata, ifsta, bss); |
3e122be0 | 2320 | ieee80211_rx_bss_put(local, bss); |
167ad6f7 | 2321 | return ret; |
00d3f14c JB |
2322 | } else if (bss) |
2323 | ieee80211_rx_bss_put(local, bss); | |
80693ceb | 2324 | |
f0706e82 JB |
2325 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
2326 | printk(KERN_DEBUG " did not try to join ibss\n"); | |
2327 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
2328 | ||
2329 | /* Selected IBSS not found in current scan results - try to scan */ | |
48c2fc59 | 2330 | if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED && |
f698d856 | 2331 | !ieee80211_sta_active_ibss(sdata)) { |
f0706e82 JB |
2332 | mod_timer(&ifsta->timer, jiffies + |
2333 | IEEE80211_IBSS_MERGE_INTERVAL); | |
2334 | } else if (time_after(jiffies, local->last_scan_completed + | |
2335 | IEEE80211_SCAN_INTERVAL)) { | |
2336 | printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to " | |
f698d856 | 2337 | "join\n", sdata->dev->name); |
2a519311 JB |
2338 | |
2339 | /* XXX maybe racy? */ | |
2340 | if (local->scan_req) | |
2341 | return -EBUSY; | |
2342 | ||
2343 | memcpy(local->int_scan_req.ssids[0].ssid, | |
2344 | ifsta->ssid, IEEE80211_MAX_SSID_LEN); | |
2345 | local->int_scan_req.ssids[0].ssid_len = ifsta->ssid_len; | |
2346 | return ieee80211_request_scan(sdata, &local->int_scan_req); | |
48c2fc59 | 2347 | } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) { |
f0706e82 JB |
2348 | int interval = IEEE80211_SCAN_INTERVAL; |
2349 | ||
2350 | if (time_after(jiffies, ifsta->ibss_join_req + | |
2351 | IEEE80211_IBSS_JOIN_TIMEOUT)) { | |
d6f2da5b | 2352 | if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) && |
8318d78a JB |
2353 | (!(local->oper_channel->flags & |
2354 | IEEE80211_CHAN_NO_IBSS))) | |
f698d856 | 2355 | return ieee80211_sta_create_ibss(sdata, ifsta); |
d6f2da5b | 2356 | if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) { |
8318d78a | 2357 | printk(KERN_DEBUG "%s: IBSS not allowed on" |
f698d856 | 2358 | " %d MHz\n", sdata->dev->name, |
8318d78a | 2359 | local->hw.conf.channel->center_freq); |
f0706e82 JB |
2360 | } |
2361 | ||
2362 | /* No IBSS found - decrease scan interval and continue | |
2363 | * scanning. */ | |
2364 | interval = IEEE80211_SCAN_INTERVAL_SLOW; | |
2365 | } | |
2366 | ||
48c2fc59 | 2367 | ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH; |
f0706e82 JB |
2368 | mod_timer(&ifsta->timer, jiffies + interval); |
2369 | return 0; | |
2370 | } | |
2371 | ||
2372 | return 0; | |
2373 | } | |
2374 | ||
2375 | ||
9c6bd790 JB |
2376 | static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata, |
2377 | struct ieee80211_if_sta *ifsta) | |
f0706e82 | 2378 | { |
9c6bd790 | 2379 | struct ieee80211_local *local = sdata->local; |
00d3f14c JB |
2380 | struct ieee80211_bss *bss; |
2381 | u8 *bssid = ifsta->bssid, *ssid = ifsta->ssid; | |
2382 | u8 ssid_len = ifsta->ssid_len; | |
2383 | u16 capa_mask = WLAN_CAPABILITY_ESS; | |
2384 | u16 capa_val = WLAN_CAPABILITY_ESS; | |
2385 | struct ieee80211_channel *chan = local->oper_channel; | |
2386 | ||
2387 | if (ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL | | |
2388 | IEEE80211_STA_AUTO_BSSID_SEL | | |
2389 | IEEE80211_STA_AUTO_CHANNEL_SEL)) { | |
2390 | capa_mask |= WLAN_CAPABILITY_PRIVACY; | |
2391 | if (sdata->default_key) | |
2392 | capa_val |= WLAN_CAPABILITY_PRIVACY; | |
f0706e82 | 2393 | } |
9d139c81 | 2394 | |
00d3f14c JB |
2395 | if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) |
2396 | chan = NULL; | |
2397 | ||
2398 | if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) | |
2399 | bssid = NULL; | |
2400 | ||
2401 | if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) { | |
2402 | ssid = NULL; | |
2403 | ssid_len = 0; | |
2404 | } | |
2405 | ||
2406 | bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan, | |
2407 | bssid, ssid, ssid_len, | |
2408 | capa_mask, capa_val); | |
2409 | ||
2410 | if (bss) { | |
2411 | ieee80211_set_freq(sdata, bss->cbss.channel->center_freq); | |
9c6bd790 | 2412 | if (!(ifsta->flags & IEEE80211_STA_SSID_SET)) |
00d3f14c JB |
2413 | ieee80211_sta_set_ssid(sdata, bss->ssid, |
2414 | bss->ssid_len); | |
2415 | ieee80211_sta_set_bssid(sdata, bss->cbss.bssid); | |
2416 | ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len, | |
2417 | bss->supp_rates); | |
fdfacf0a JM |
2418 | if (sdata->u.sta.mfp == IEEE80211_MFP_REQUIRED) |
2419 | sdata->u.sta.flags |= IEEE80211_STA_MFP_ENABLED; | |
2420 | else | |
2421 | sdata->u.sta.flags &= ~IEEE80211_STA_MFP_ENABLED; | |
f0706e82 | 2422 | |
9c6bd790 JB |
2423 | /* Send out direct probe if no probe resp was received or |
2424 | * the one we have is outdated | |
2425 | */ | |
00d3f14c JB |
2426 | if (!bss->last_probe_resp || |
2427 | time_after(jiffies, bss->last_probe_resp | |
9c6bd790 JB |
2428 | + IEEE80211_SCAN_RESULT_EXPIRE)) |
2429 | ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE; | |
2430 | else | |
2431 | ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE; | |
f0706e82 | 2432 | |
00d3f14c | 2433 | ieee80211_rx_bss_put(local, bss); |
9c6bd790 JB |
2434 | ieee80211_sta_reset_auth(sdata, ifsta); |
2435 | return 0; | |
2436 | } else { | |
2437 | if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) { | |
2438 | ifsta->assoc_scan_tries++; | |
2a519311 JB |
2439 | /* XXX maybe racy? */ |
2440 | if (local->scan_req) | |
2441 | return -1; | |
2442 | memcpy(local->int_scan_req.ssids[0].ssid, | |
2443 | ifsta->ssid, IEEE80211_MAX_SSID_LEN); | |
9c6bd790 | 2444 | if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) |
2a519311 | 2445 | local->int_scan_req.ssids[0].ssid_len = 0; |
9c6bd790 | 2446 | else |
2a519311 JB |
2447 | local->int_scan_req.ssids[0].ssid_len = ifsta->ssid_len; |
2448 | ieee80211_start_scan(sdata, &local->int_scan_req); | |
9c6bd790 JB |
2449 | ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE; |
2450 | set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); | |
e374055a S |
2451 | } else { |
2452 | ifsta->assoc_scan_tries = 0; | |
9c6bd790 | 2453 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
e374055a | 2454 | } |
9c6bd790 JB |
2455 | } |
2456 | return -1; | |
2457 | } | |
2458 | ||
2459 | ||
2460 | static void ieee80211_sta_work(struct work_struct *work) | |
2461 | { | |
2462 | struct ieee80211_sub_if_data *sdata = | |
2463 | container_of(work, struct ieee80211_sub_if_data, u.sta.work); | |
2464 | struct ieee80211_local *local = sdata->local; | |
2465 | struct ieee80211_if_sta *ifsta; | |
2466 | struct sk_buff *skb; | |
2467 | ||
2468 | if (!netif_running(sdata->dev)) | |
2469 | return; | |
2470 | ||
c2b13452 | 2471 | if (local->sw_scanning || local->hw_scanning) |
9c6bd790 JB |
2472 | return; |
2473 | ||
05c914fe JB |
2474 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION && |
2475 | sdata->vif.type != NL80211_IFTYPE_ADHOC)) | |
9c6bd790 | 2476 | return; |
f0706e82 JB |
2477 | ifsta = &sdata->u.sta; |
2478 | ||
9c6bd790 JB |
2479 | while ((skb = skb_dequeue(&ifsta->skb_queue))) |
2480 | ieee80211_sta_rx_queued_mgmt(sdata, skb); | |
2481 | ||
2482 | if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE && | |
2483 | ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE && | |
2484 | ifsta->state != IEEE80211_STA_MLME_ASSOCIATE && | |
2485 | test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) { | |
2a519311 | 2486 | ieee80211_start_scan(sdata, local->scan_req); |
9c6bd790 | 2487 | return; |
f0706e82 JB |
2488 | } |
2489 | ||
9c6bd790 JB |
2490 | if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) { |
2491 | if (ieee80211_sta_config_auth(sdata, ifsta)) | |
2492 | return; | |
2493 | clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); | |
2494 | } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request)) | |
2495 | return; | |
d6f2da5b | 2496 | |
9c6bd790 JB |
2497 | switch (ifsta->state) { |
2498 | case IEEE80211_STA_MLME_DISABLED: | |
2499 | break; | |
2500 | case IEEE80211_STA_MLME_DIRECT_PROBE: | |
2501 | ieee80211_direct_probe(sdata, ifsta); | |
2502 | break; | |
2503 | case IEEE80211_STA_MLME_AUTHENTICATE: | |
2504 | ieee80211_authenticate(sdata, ifsta); | |
2505 | break; | |
2506 | case IEEE80211_STA_MLME_ASSOCIATE: | |
2507 | ieee80211_associate(sdata, ifsta); | |
2508 | break; | |
2509 | case IEEE80211_STA_MLME_ASSOCIATED: | |
2510 | ieee80211_associated(sdata, ifsta); | |
2511 | break; | |
2512 | case IEEE80211_STA_MLME_IBSS_SEARCH: | |
2513 | ieee80211_sta_find_ibss(sdata, ifsta); | |
2514 | break; | |
2515 | case IEEE80211_STA_MLME_IBSS_JOINED: | |
2516 | ieee80211_sta_merge_ibss(sdata, ifsta); | |
2517 | break; | |
2518 | default: | |
2519 | WARN_ON(1); | |
2520 | break; | |
2521 | } | |
2522 | ||
2523 | if (ieee80211_privacy_mismatch(sdata, ifsta)) { | |
2524 | printk(KERN_DEBUG "%s: privacy configuration mismatch and " | |
2525 | "mixed-cell disabled - disassociate\n", sdata->dev->name); | |
2526 | ||
2527 | ieee80211_set_disassoc(sdata, ifsta, false, true, | |
2528 | WLAN_REASON_UNSPECIFIED); | |
2529 | } | |
f0706e82 JB |
2530 | } |
2531 | ||
9c6bd790 JB |
2532 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
2533 | { | |
05c914fe | 2534 | if (sdata->vif.type == NL80211_IFTYPE_STATION) |
9c6bd790 JB |
2535 | queue_work(sdata->local->hw.workqueue, |
2536 | &sdata->u.sta.work); | |
2537 | } | |
f0706e82 | 2538 | |
9c6bd790 JB |
2539 | /* interface setup */ |
2540 | void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) | |
f0706e82 | 2541 | { |
9c6bd790 | 2542 | struct ieee80211_if_sta *ifsta; |
988c0f72 | 2543 | |
9c6bd790 JB |
2544 | ifsta = &sdata->u.sta; |
2545 | INIT_WORK(&ifsta->work, ieee80211_sta_work); | |
c481ec97 | 2546 | INIT_WORK(&ifsta->chswitch_work, ieee80211_chswitch_work); |
9c6bd790 | 2547 | setup_timer(&ifsta->timer, ieee80211_sta_timer, |
c481ec97 S |
2548 | (unsigned long) sdata); |
2549 | setup_timer(&ifsta->chswitch_timer, ieee80211_chswitch_timer, | |
9c6bd790 JB |
2550 | (unsigned long) sdata); |
2551 | skb_queue_head_init(&ifsta->skb_queue); | |
2552 | ||
2553 | ifsta->capab = WLAN_CAPABILITY_ESS; | |
2554 | ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN | | |
2555 | IEEE80211_AUTH_ALG_SHARED_KEY; | |
2556 | ifsta->flags |= IEEE80211_STA_CREATE_IBSS | | |
2557 | IEEE80211_STA_AUTO_BSSID_SEL | | |
2558 | IEEE80211_STA_AUTO_CHANNEL_SEL; | |
2559 | if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4) | |
2560 | ifsta->flags |= IEEE80211_STA_WMM_ENABLED; | |
f0706e82 JB |
2561 | } |
2562 | ||
9c6bd790 JB |
2563 | /* |
2564 | * Add a new IBSS station, will also be called by the RX code when, | |
2565 | * in IBSS mode, receiving a frame from a yet-unknown station, hence | |
2566 | * must be callable in atomic context. | |
2567 | */ | |
f698d856 | 2568 | struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, |
881d948c | 2569 | u8 *bssid,u8 *addr, u32 supp_rates) |
f0706e82 | 2570 | { |
f698d856 | 2571 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 2572 | struct sta_info *sta; |
87291c02 | 2573 | int band = local->hw.conf.channel->band; |
f0706e82 JB |
2574 | |
2575 | /* TODO: Could consider removing the least recently used entry and | |
2576 | * allow new one to be added. */ | |
2577 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { | |
2578 | if (net_ratelimit()) { | |
2579 | printk(KERN_DEBUG "%s: No room for a new IBSS STA " | |
0c68ae26 | 2580 | "entry %pM\n", sdata->dev->name, addr); |
f0706e82 JB |
2581 | } |
2582 | return NULL; | |
2583 | } | |
2584 | ||
1e188637 | 2585 | if (compare_ether_addr(bssid, sdata->u.sta.bssid)) |
87291c02 VK |
2586 | return NULL; |
2587 | ||
f4ea83dd | 2588 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
0c68ae26 JB |
2589 | printk(KERN_DEBUG "%s: Adding new IBSS station %pM (dev=%s)\n", |
2590 | wiphy_name(local->hw.wiphy), addr, sdata->dev->name); | |
f4ea83dd | 2591 | #endif |
f0706e82 | 2592 | |
73651ee6 JB |
2593 | sta = sta_info_alloc(sdata, addr, GFP_ATOMIC); |
2594 | if (!sta) | |
f0706e82 JB |
2595 | return NULL; |
2596 | ||
07346f81 | 2597 | set_sta_flags(sta, WLAN_STA_AUTHORIZED); |
238814fd | 2598 | |
8e1535d5 | 2599 | /* make sure mandatory rates are always added */ |
323ce79a | 2600 | sta->sta.supp_rates[band] = supp_rates | |
96dd22ac | 2601 | ieee80211_mandatory_rates(local, band); |
f0706e82 | 2602 | |
4b7679a5 | 2603 | rate_control_rate_init(sta); |
f0706e82 | 2604 | |
93e5deb1 | 2605 | if (sta_info_insert(sta)) |
73651ee6 | 2606 | return NULL; |
73651ee6 | 2607 | |
d0709a65 | 2608 | return sta; |
f0706e82 JB |
2609 | } |
2610 | ||
9c6bd790 JB |
2611 | /* configuration hooks */ |
2612 | void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata, | |
2613 | struct ieee80211_if_sta *ifsta) | |
60f8b39c JB |
2614 | { |
2615 | struct ieee80211_local *local = sdata->local; | |
60f8b39c | 2616 | |
05c914fe | 2617 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
9c6bd790 | 2618 | return; |
60f8b39c | 2619 | |
9c6bd790 JB |
2620 | if ((ifsta->flags & (IEEE80211_STA_BSSID_SET | |
2621 | IEEE80211_STA_AUTO_BSSID_SEL)) && | |
2622 | (ifsta->flags & (IEEE80211_STA_SSID_SET | | |
2623 | IEEE80211_STA_AUTO_SSID_SEL))) { | |
60f8b39c | 2624 | |
9c6bd790 JB |
2625 | if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) |
2626 | ieee80211_set_disassoc(sdata, ifsta, true, true, | |
2627 | WLAN_REASON_DEAUTH_LEAVING); | |
60f8b39c | 2628 | |
9c6bd790 JB |
2629 | set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); |
2630 | queue_work(local->hw.workqueue, &ifsta->work); | |
2631 | } | |
2632 | } | |
60f8b39c | 2633 | |
9c6bd790 JB |
2634 | int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len) |
2635 | { | |
2636 | struct ieee80211_if_sta *ifsta; | |
60f8b39c | 2637 | |
9c6bd790 JB |
2638 | if (len > IEEE80211_MAX_SSID_LEN) |
2639 | return -EINVAL; | |
2640 | ||
2641 | ifsta = &sdata->u.sta; | |
2642 | ||
2643 | if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) { | |
2644 | memset(ifsta->ssid, 0, sizeof(ifsta->ssid)); | |
2645 | memcpy(ifsta->ssid, ssid, len); | |
2646 | ifsta->ssid_len = len; | |
60f8b39c | 2647 | } |
60f8b39c | 2648 | |
dfe67012 AF |
2649 | ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
2650 | ||
9c6bd790 JB |
2651 | if (len) |
2652 | ifsta->flags |= IEEE80211_STA_SSID_SET; | |
2653 | else | |
2654 | ifsta->flags &= ~IEEE80211_STA_SSID_SET; | |
60f8b39c | 2655 | |
dfe67012 | 2656 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
9c6bd790 JB |
2657 | ifsta->ibss_join_req = jiffies; |
2658 | ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH; | |
2659 | return ieee80211_sta_find_ibss(sdata, ifsta); | |
2660 | } | |
2661 | ||
2662 | return 0; | |
2663 | } | |
2664 | ||
2665 | int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len) | |
2666 | { | |
2667 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
2668 | memcpy(ssid, ifsta->ssid, ifsta->ssid_len); | |
2669 | *len = ifsta->ssid_len; | |
2670 | return 0; | |
2671 | } | |
2672 | ||
2673 | int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid) | |
2674 | { | |
2675 | struct ieee80211_if_sta *ifsta; | |
9c6bd790 JB |
2676 | |
2677 | ifsta = &sdata->u.sta; | |
2678 | ||
dfe67012 AF |
2679 | if (is_valid_ether_addr(bssid)) { |
2680 | memcpy(ifsta->bssid, bssid, ETH_ALEN); | |
2681 | ifsta->flags |= IEEE80211_STA_BSSID_SET; | |
2682 | } else { | |
2683 | memset(ifsta->bssid, 0, ETH_ALEN); | |
2684 | ifsta->flags &= ~IEEE80211_STA_BSSID_SET; | |
2685 | } | |
2686 | ||
2687 | if (netif_running(sdata->dev)) { | |
2688 | if (ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID)) { | |
9c6bd790 JB |
2689 | printk(KERN_DEBUG "%s: Failed to config new BSSID to " |
2690 | "the low-level driver\n", sdata->dev->name); | |
9c6bd790 JB |
2691 | } |
2692 | } | |
60f8b39c | 2693 | |
dfe67012 | 2694 | return ieee80211_sta_set_ssid(sdata, ifsta->ssid, ifsta->ssid_len); |
9c6bd790 JB |
2695 | } |
2696 | ||
2697 | int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len) | |
2698 | { | |
2699 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
2700 | ||
2701 | kfree(ifsta->extra_ie); | |
2702 | if (len == 0) { | |
2703 | ifsta->extra_ie = NULL; | |
2704 | ifsta->extra_ie_len = 0; | |
60f8b39c | 2705 | return 0; |
60f8b39c | 2706 | } |
9c6bd790 JB |
2707 | ifsta->extra_ie = kmalloc(len, GFP_KERNEL); |
2708 | if (!ifsta->extra_ie) { | |
2709 | ifsta->extra_ie_len = 0; | |
2710 | return -ENOMEM; | |
2711 | } | |
2712 | memcpy(ifsta->extra_ie, ie, len); | |
2713 | ifsta->extra_ie_len = len; | |
2714 | return 0; | |
60f8b39c JB |
2715 | } |
2716 | ||
f698d856 | 2717 | int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 2718 | { |
f0706e82 JB |
2719 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
2720 | ||
f4ea83dd | 2721 | printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n", |
f698d856 | 2722 | sdata->dev->name, reason); |
f0706e82 | 2723 | |
05c914fe JB |
2724 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
2725 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
f0706e82 JB |
2726 | return -EINVAL; |
2727 | ||
aa458d17 | 2728 | ieee80211_set_disassoc(sdata, ifsta, true, true, reason); |
f0706e82 JB |
2729 | return 0; |
2730 | } | |
2731 | ||
f698d856 | 2732 | int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 2733 | { |
f0706e82 JB |
2734 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
2735 | ||
f4ea83dd | 2736 | printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n", |
f698d856 | 2737 | sdata->dev->name, reason); |
f0706e82 | 2738 | |
05c914fe | 2739 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
f0706e82 JB |
2740 | return -EINVAL; |
2741 | ||
d6f2da5b | 2742 | if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED)) |
f0706e82 JB |
2743 | return -1; |
2744 | ||
aa458d17 | 2745 | ieee80211_set_disassoc(sdata, ifsta, false, true, reason); |
f0706e82 JB |
2746 | return 0; |
2747 | } | |
84363e6e | 2748 | |
9c6bd790 JB |
2749 | /* scan finished notification */ |
2750 | void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) | |
2751 | { | |
2752 | struct ieee80211_sub_if_data *sdata = local->scan_sdata; | |
2753 | struct ieee80211_if_sta *ifsta; | |
2754 | ||
05c914fe | 2755 | if (sdata && sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
9c6bd790 | 2756 | ifsta = &sdata->u.sta; |
c0415b54 AF |
2757 | if ((!(ifsta->flags & IEEE80211_STA_PREV_BSSID_SET)) || |
2758 | !ieee80211_sta_active_ibss(sdata)) | |
9c6bd790 JB |
2759 | ieee80211_sta_find_ibss(sdata, ifsta); |
2760 | } | |
2761 | ||
2762 | /* Restart STA timers */ | |
2763 | rcu_read_lock(); | |
2764 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
2765 | ieee80211_restart_sta_timer(sdata); | |
2766 | rcu_read_unlock(); | |
2767 | } | |
520eb820 KV |
2768 | |
2769 | void ieee80211_dynamic_ps_disable_work(struct work_struct *work) | |
2770 | { | |
2771 | struct ieee80211_local *local = | |
2772 | container_of(work, struct ieee80211_local, | |
2773 | dynamic_ps_disable_work); | |
2774 | ||
2775 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { | |
2776 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
2777 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
2778 | } | |
2779 | ||
2780 | ieee80211_wake_queues_by_reason(&local->hw, | |
2781 | IEEE80211_QUEUE_STOP_REASON_PS); | |
2782 | } | |
2783 | ||
2784 | void ieee80211_dynamic_ps_enable_work(struct work_struct *work) | |
2785 | { | |
2786 | struct ieee80211_local *local = | |
2787 | container_of(work, struct ieee80211_local, | |
2788 | dynamic_ps_enable_work); | |
a97b77b9 | 2789 | struct ieee80211_sub_if_data *sdata = local->scan_sdata; |
520eb820 KV |
2790 | |
2791 | if (local->hw.conf.flags & IEEE80211_CONF_PS) | |
2792 | return; | |
2793 | ||
4be8c387 JB |
2794 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) |
2795 | ieee80211_send_nullfunc(local, sdata, 1); | |
520eb820 | 2796 | |
4be8c387 | 2797 | local->hw.conf.flags |= IEEE80211_CONF_PS; |
520eb820 KV |
2798 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
2799 | } | |
2800 | ||
2801 | void ieee80211_dynamic_ps_timer(unsigned long data) | |
2802 | { | |
2803 | struct ieee80211_local *local = (void *) data; | |
2804 | ||
2805 | queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work); | |
2806 | } |