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f0706e82 JB |
1 | /* |
2 | * BSS client mode implementation | |
3 | * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi> | |
4 | * Copyright 2004, Instant802 Networks, Inc. | |
5 | * Copyright 2005, Devicescape Software, Inc. | |
6 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
7 | * Copyright 2007, Michael Wu <flamingice@sourmilk.net> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
13 | ||
5b323edb | 14 | #include <linux/delay.h> |
f0706e82 JB |
15 | #include <linux/if_ether.h> |
16 | #include <linux/skbuff.h> | |
17 | #include <linux/netdevice.h> | |
18 | #include <linux/if_arp.h> | |
19 | #include <linux/wireless.h> | |
20 | #include <linux/random.h> | |
21 | #include <linux/etherdevice.h> | |
d0709a65 | 22 | #include <linux/rtnetlink.h> |
f0706e82 | 23 | #include <net/iw_handler.h> |
f0706e82 | 24 | #include <net/mac80211.h> |
472dbc45 | 25 | #include <asm/unaligned.h> |
60f8b39c | 26 | |
f0706e82 | 27 | #include "ieee80211_i.h" |
2c8dccc7 JB |
28 | #include "rate.h" |
29 | #include "led.h" | |
f0706e82 | 30 | |
6042a3e3 | 31 | #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2 |
f0706e82 JB |
32 | #define IEEE80211_AUTH_TIMEOUT (HZ / 5) |
33 | #define IEEE80211_AUTH_MAX_TRIES 3 | |
34 | #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) | |
35 | #define IEEE80211_ASSOC_MAX_TRIES 3 | |
36 | #define IEEE80211_MONITORING_INTERVAL (2 * HZ) | |
37 | #define IEEE80211_PROBE_INTERVAL (60 * HZ) | |
38 | #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ) | |
39 | #define IEEE80211_SCAN_INTERVAL (2 * HZ) | |
40 | #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ) | |
872ba533 | 41 | #define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ) |
f0706e82 | 42 | |
f0706e82 JB |
43 | #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ) |
44 | #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ) | |
45 | ||
46 | #define IEEE80211_IBSS_MAX_STA_ENTRIES 128 | |
47 | ||
48 | ||
5484e237 JB |
49 | /* utils */ |
50 | static int ecw2cw(int ecw) | |
60f8b39c | 51 | { |
5484e237 | 52 | return (1 << ecw) - 1; |
60f8b39c JB |
53 | } |
54 | ||
c2b13452 | 55 | static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie) |
43ac2ca3 JM |
56 | { |
57 | u8 *end, *pos; | |
58 | ||
59 | pos = bss->ies; | |
60 | if (pos == NULL) | |
61 | return NULL; | |
62 | end = pos + bss->ies_len; | |
63 | ||
64 | while (pos + 1 < end) { | |
65 | if (pos + 2 + pos[1] > end) | |
66 | break; | |
67 | if (pos[0] == ie) | |
68 | return pos; | |
69 | pos += 2 + pos[1]; | |
70 | } | |
71 | ||
72 | return NULL; | |
73 | } | |
74 | ||
c2b13452 | 75 | static int ieee80211_compatible_rates(struct ieee80211_bss *bss, |
9ac19a90 JB |
76 | struct ieee80211_supported_band *sband, |
77 | u64 *rates) | |
78 | { | |
79 | int i, j, count; | |
80 | *rates = 0; | |
81 | count = 0; | |
82 | for (i = 0; i < bss->supp_rates_len; i++) { | |
83 | int rate = (bss->supp_rates[i] & 0x7F) * 5; | |
84 | ||
85 | for (j = 0; j < sband->n_bitrates; j++) | |
86 | if (sband->bitrates[j].bitrate == rate) { | |
87 | *rates |= BIT(j); | |
88 | count++; | |
89 | break; | |
90 | } | |
91 | } | |
92 | ||
93 | return count; | |
94 | } | |
95 | ||
9c6bd790 JB |
96 | /* also used by mesh code */ |
97 | u64 ieee80211_sta_get_rates(struct ieee80211_local *local, | |
98 | struct ieee802_11_elems *elems, | |
99 | enum ieee80211_band band) | |
60f8b39c | 100 | { |
9c6bd790 JB |
101 | struct ieee80211_supported_band *sband; |
102 | struct ieee80211_rate *bitrates; | |
103 | size_t num_rates; | |
104 | u64 supp_rates; | |
105 | int i, j; | |
106 | sband = local->hw.wiphy->bands[band]; | |
60f8b39c | 107 | |
9c6bd790 JB |
108 | if (!sband) { |
109 | WARN_ON(1); | |
110 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
60f8b39c | 111 | } |
60f8b39c | 112 | |
9c6bd790 JB |
113 | bitrates = sband->bitrates; |
114 | num_rates = sband->n_bitrates; | |
115 | supp_rates = 0; | |
116 | for (i = 0; i < elems->supp_rates_len + | |
117 | elems->ext_supp_rates_len; i++) { | |
118 | u8 rate = 0; | |
119 | int own_rate; | |
120 | if (i < elems->supp_rates_len) | |
121 | rate = elems->supp_rates[i]; | |
122 | else if (elems->ext_supp_rates) | |
123 | rate = elems->ext_supp_rates | |
124 | [i - elems->supp_rates_len]; | |
125 | own_rate = 5 * (rate & 0x7f); | |
126 | for (j = 0; j < num_rates; j++) | |
127 | if (bitrates[j].bitrate == own_rate) | |
128 | supp_rates |= BIT(j); | |
129 | } | |
130 | return supp_rates; | |
60f8b39c JB |
131 | } |
132 | ||
9c6bd790 JB |
133 | /* frame sending functions */ |
134 | ||
135 | /* also used by scanning code */ | |
0a51b27e JB |
136 | void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst, |
137 | u8 *ssid, size_t ssid_len) | |
60f8b39c JB |
138 | { |
139 | struct ieee80211_local *local = sdata->local; | |
140 | struct ieee80211_supported_band *sband; | |
141 | struct sk_buff *skb; | |
142 | struct ieee80211_mgmt *mgmt; | |
143 | u8 *pos, *supp_rates, *esupp_rates = NULL; | |
144 | int i; | |
145 | ||
146 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200); | |
147 | if (!skb) { | |
148 | printk(KERN_DEBUG "%s: failed to allocate buffer for probe " | |
149 | "request\n", sdata->dev->name); | |
150 | return; | |
151 | } | |
152 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
153 | ||
154 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
155 | memset(mgmt, 0, 24); | |
156 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
157 | IEEE80211_STYPE_PROBE_REQ); | |
158 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); | |
159 | if (dst) { | |
160 | memcpy(mgmt->da, dst, ETH_ALEN); | |
161 | memcpy(mgmt->bssid, dst, ETH_ALEN); | |
162 | } else { | |
163 | memset(mgmt->da, 0xff, ETH_ALEN); | |
164 | memset(mgmt->bssid, 0xff, ETH_ALEN); | |
165 | } | |
166 | pos = skb_put(skb, 2 + ssid_len); | |
167 | *pos++ = WLAN_EID_SSID; | |
168 | *pos++ = ssid_len; | |
169 | memcpy(pos, ssid, ssid_len); | |
170 | ||
171 | supp_rates = skb_put(skb, 2); | |
172 | supp_rates[0] = WLAN_EID_SUPP_RATES; | |
173 | supp_rates[1] = 0; | |
174 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
175 | ||
176 | for (i = 0; i < sband->n_bitrates; i++) { | |
177 | struct ieee80211_rate *rate = &sband->bitrates[i]; | |
178 | if (esupp_rates) { | |
179 | pos = skb_put(skb, 1); | |
180 | esupp_rates[1]++; | |
181 | } else if (supp_rates[1] == 8) { | |
182 | esupp_rates = skb_put(skb, 3); | |
183 | esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES; | |
184 | esupp_rates[1] = 1; | |
185 | pos = &esupp_rates[2]; | |
186 | } else { | |
187 | pos = skb_put(skb, 1); | |
188 | supp_rates[1]++; | |
189 | } | |
190 | *pos = rate->bitrate / 5; | |
191 | } | |
192 | ||
e50db65c | 193 | ieee80211_tx_skb(sdata, skb, 0); |
60f8b39c JB |
194 | } |
195 | ||
9c6bd790 JB |
196 | static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, |
197 | struct ieee80211_if_sta *ifsta, | |
198 | int transaction, u8 *extra, size_t extra_len, | |
199 | int encrypt) | |
200 | { | |
201 | struct ieee80211_local *local = sdata->local; | |
202 | struct sk_buff *skb; | |
203 | struct ieee80211_mgmt *mgmt; | |
204 | ||
205 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
206 | sizeof(*mgmt) + 6 + extra_len); | |
207 | if (!skb) { | |
208 | printk(KERN_DEBUG "%s: failed to allocate buffer for auth " | |
209 | "frame\n", sdata->dev->name); | |
210 | return; | |
211 | } | |
212 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
213 | ||
214 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); | |
215 | memset(mgmt, 0, 24 + 6); | |
216 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
217 | IEEE80211_STYPE_AUTH); | |
218 | if (encrypt) | |
219 | mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
220 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
221 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); | |
222 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
223 | mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg); | |
224 | mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); | |
225 | ifsta->auth_transaction = transaction + 1; | |
226 | mgmt->u.auth.status_code = cpu_to_le16(0); | |
227 | if (extra) | |
228 | memcpy(skb_put(skb, extra_len), extra, extra_len); | |
229 | ||
230 | ieee80211_tx_skb(sdata, skb, encrypt); | |
231 | } | |
232 | ||
9ac19a90 JB |
233 | static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata, |
234 | struct ieee80211_if_sta *ifsta) | |
235 | { | |
236 | struct ieee80211_local *local = sdata->local; | |
237 | struct sk_buff *skb; | |
238 | struct ieee80211_mgmt *mgmt; | |
d9fe60de | 239 | u8 *pos, *ies, *ht_ie; |
9ac19a90 JB |
240 | int i, len, count, rates_len, supp_rates_len; |
241 | u16 capab; | |
c2b13452 | 242 | struct ieee80211_bss *bss; |
9ac19a90 JB |
243 | int wmm = 0; |
244 | struct ieee80211_supported_band *sband; | |
245 | u64 rates = 0; | |
246 | ||
247 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
248 | sizeof(*mgmt) + 200 + ifsta->extra_ie_len + | |
249 | ifsta->ssid_len); | |
250 | if (!skb) { | |
251 | printk(KERN_DEBUG "%s: failed to allocate buffer for assoc " | |
252 | "frame\n", sdata->dev->name); | |
253 | return; | |
254 | } | |
255 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
256 | ||
257 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
258 | ||
259 | capab = ifsta->capab; | |
260 | ||
261 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) { | |
262 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) | |
263 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; | |
264 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) | |
265 | capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; | |
266 | } | |
267 | ||
268 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, | |
269 | local->hw.conf.channel->center_freq, | |
270 | ifsta->ssid, ifsta->ssid_len); | |
271 | if (bss) { | |
272 | if (bss->capability & WLAN_CAPABILITY_PRIVACY) | |
273 | capab |= WLAN_CAPABILITY_PRIVACY; | |
274 | if (bss->wmm_used) | |
275 | wmm = 1; | |
276 | ||
277 | /* get all rates supported by the device and the AP as | |
278 | * some APs don't like getting a superset of their rates | |
279 | * in the association request (e.g. D-Link DAP 1353 in | |
280 | * b-only mode) */ | |
281 | rates_len = ieee80211_compatible_rates(bss, sband, &rates); | |
282 | ||
283 | if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && | |
284 | (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)) | |
285 | capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; | |
286 | ||
287 | ieee80211_rx_bss_put(local, bss); | |
288 | } else { | |
289 | rates = ~0; | |
290 | rates_len = sband->n_bitrates; | |
291 | } | |
292 | ||
293 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
294 | memset(mgmt, 0, 24); | |
295 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
296 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); | |
297 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
298 | ||
299 | if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) { | |
300 | skb_put(skb, 10); | |
301 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
302 | IEEE80211_STYPE_REASSOC_REQ); | |
303 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); | |
304 | mgmt->u.reassoc_req.listen_interval = | |
305 | cpu_to_le16(local->hw.conf.listen_interval); | |
306 | memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid, | |
307 | ETH_ALEN); | |
308 | } else { | |
309 | skb_put(skb, 4); | |
310 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
311 | IEEE80211_STYPE_ASSOC_REQ); | |
312 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); | |
313 | mgmt->u.reassoc_req.listen_interval = | |
314 | cpu_to_le16(local->hw.conf.listen_interval); | |
315 | } | |
316 | ||
317 | /* SSID */ | |
318 | ies = pos = skb_put(skb, 2 + ifsta->ssid_len); | |
319 | *pos++ = WLAN_EID_SSID; | |
320 | *pos++ = ifsta->ssid_len; | |
321 | memcpy(pos, ifsta->ssid, ifsta->ssid_len); | |
322 | ||
323 | /* add all rates which were marked to be used above */ | |
324 | supp_rates_len = rates_len; | |
325 | if (supp_rates_len > 8) | |
326 | supp_rates_len = 8; | |
327 | ||
328 | len = sband->n_bitrates; | |
329 | pos = skb_put(skb, supp_rates_len + 2); | |
330 | *pos++ = WLAN_EID_SUPP_RATES; | |
331 | *pos++ = supp_rates_len; | |
332 | ||
333 | count = 0; | |
334 | for (i = 0; i < sband->n_bitrates; i++) { | |
335 | if (BIT(i) & rates) { | |
336 | int rate = sband->bitrates[i].bitrate; | |
337 | *pos++ = (u8) (rate / 5); | |
338 | if (++count == 8) | |
339 | break; | |
340 | } | |
341 | } | |
342 | ||
343 | if (rates_len > count) { | |
344 | pos = skb_put(skb, rates_len - count + 2); | |
345 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
346 | *pos++ = rates_len - count; | |
347 | ||
348 | for (i++; i < sband->n_bitrates; i++) { | |
349 | if (BIT(i) & rates) { | |
350 | int rate = sband->bitrates[i].bitrate; | |
351 | *pos++ = (u8) (rate / 5); | |
352 | } | |
353 | } | |
354 | } | |
355 | ||
356 | if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { | |
357 | /* 1. power capabilities */ | |
358 | pos = skb_put(skb, 4); | |
359 | *pos++ = WLAN_EID_PWR_CAPABILITY; | |
360 | *pos++ = 2; | |
361 | *pos++ = 0; /* min tx power */ | |
362 | *pos++ = local->hw.conf.channel->max_power; /* max tx power */ | |
363 | ||
364 | /* 2. supported channels */ | |
365 | /* TODO: get this in reg domain format */ | |
366 | pos = skb_put(skb, 2 * sband->n_channels + 2); | |
367 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; | |
368 | *pos++ = 2 * sband->n_channels; | |
369 | for (i = 0; i < sband->n_channels; i++) { | |
370 | *pos++ = ieee80211_frequency_to_channel( | |
371 | sband->channels[i].center_freq); | |
372 | *pos++ = 1; /* one channel in the subband*/ | |
373 | } | |
374 | } | |
375 | ||
376 | if (ifsta->extra_ie) { | |
377 | pos = skb_put(skb, ifsta->extra_ie_len); | |
378 | memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len); | |
379 | } | |
380 | ||
381 | if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) { | |
382 | pos = skb_put(skb, 9); | |
383 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
384 | *pos++ = 7; /* len */ | |
385 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ | |
386 | *pos++ = 0x50; | |
387 | *pos++ = 0xf2; | |
388 | *pos++ = 2; /* WME */ | |
389 | *pos++ = 0; /* WME info */ | |
390 | *pos++ = 1; /* WME ver */ | |
391 | *pos++ = 0; | |
392 | } | |
393 | ||
394 | /* wmm support is a must to HT */ | |
395 | if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) && | |
d9fe60de JB |
396 | sband->ht_cap.ht_supported && |
397 | (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) && | |
398 | ht_ie[1] >= sizeof(struct ieee80211_ht_info)) { | |
399 | struct ieee80211_ht_info *ht_info = | |
400 | (struct ieee80211_ht_info *)(ht_ie + 2); | |
401 | u16 cap = sband->ht_cap.cap; | |
9ac19a90 JB |
402 | __le16 tmp; |
403 | u32 flags = local->hw.conf.channel->flags; | |
404 | ||
d9fe60de JB |
405 | switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { |
406 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
9ac19a90 | 407 | if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) { |
d9fe60de | 408 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
9ac19a90 JB |
409 | cap &= ~IEEE80211_HT_CAP_SGI_40; |
410 | } | |
411 | break; | |
d9fe60de | 412 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: |
9ac19a90 | 413 | if (flags & IEEE80211_CHAN_NO_FAT_BELOW) { |
d9fe60de | 414 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
9ac19a90 JB |
415 | cap &= ~IEEE80211_HT_CAP_SGI_40; |
416 | } | |
417 | break; | |
418 | } | |
419 | ||
420 | tmp = cpu_to_le16(cap); | |
421 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2); | |
422 | *pos++ = WLAN_EID_HT_CAPABILITY; | |
423 | *pos++ = sizeof(struct ieee80211_ht_cap); | |
424 | memset(pos, 0, sizeof(struct ieee80211_ht_cap)); | |
425 | memcpy(pos, &tmp, sizeof(u16)); | |
426 | pos += sizeof(u16); | |
427 | /* TODO: needs a define here for << 2 */ | |
d9fe60de JB |
428 | *pos++ = sband->ht_cap.ampdu_factor | |
429 | (sband->ht_cap.ampdu_density << 2); | |
430 | memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs)); | |
9ac19a90 JB |
431 | } |
432 | ||
433 | kfree(ifsta->assocreq_ies); | |
434 | ifsta->assocreq_ies_len = (skb->data + skb->len) - ies; | |
435 | ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL); | |
436 | if (ifsta->assocreq_ies) | |
437 | memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len); | |
438 | ||
e50db65c | 439 | ieee80211_tx_skb(sdata, skb, 0); |
9ac19a90 JB |
440 | } |
441 | ||
442 | ||
ef422bc0 JB |
443 | static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, |
444 | u16 stype, u16 reason) | |
9ac19a90 JB |
445 | { |
446 | struct ieee80211_local *local = sdata->local; | |
ef422bc0 | 447 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
9ac19a90 JB |
448 | struct sk_buff *skb; |
449 | struct ieee80211_mgmt *mgmt; | |
450 | ||
451 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); | |
452 | if (!skb) { | |
ef422bc0 JB |
453 | printk(KERN_DEBUG "%s: failed to allocate buffer for " |
454 | "deauth/disassoc frame\n", sdata->dev->name); | |
9ac19a90 JB |
455 | return; |
456 | } | |
457 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
458 | ||
459 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
460 | memset(mgmt, 0, 24); | |
461 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
462 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); | |
463 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
ef422bc0 | 464 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); |
9ac19a90 | 465 | skb_put(skb, 2); |
ef422bc0 | 466 | /* u.deauth.reason_code == u.disassoc.reason_code */ |
9ac19a90 JB |
467 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); |
468 | ||
e50db65c | 469 | ieee80211_tx_skb(sdata, skb, 0); |
9ac19a90 JB |
470 | } |
471 | ||
60f8b39c | 472 | /* MLME */ |
f698d856 | 473 | static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata, |
c2b13452 | 474 | struct ieee80211_bss *bss) |
e2839d8f | 475 | { |
e2839d8f VK |
476 | struct ieee80211_local *local = sdata->local; |
477 | int i, have_higher_than_11mbit = 0; | |
478 | ||
e2839d8f VK |
479 | /* cf. IEEE 802.11 9.2.12 */ |
480 | for (i = 0; i < bss->supp_rates_len; i++) | |
481 | if ((bss->supp_rates[i] & 0x7f) * 5 > 110) | |
482 | have_higher_than_11mbit = 1; | |
483 | ||
484 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
485 | have_higher_than_11mbit) | |
486 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
487 | else | |
488 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
489 | ||
3d35f7c6 | 490 | ieee80211_set_wmm_default(sdata); |
e2839d8f VK |
491 | } |
492 | ||
f698d856 | 493 | static void ieee80211_sta_wmm_params(struct ieee80211_local *local, |
f0706e82 JB |
494 | struct ieee80211_if_sta *ifsta, |
495 | u8 *wmm_param, size_t wmm_param_len) | |
496 | { | |
f0706e82 JB |
497 | struct ieee80211_tx_queue_params params; |
498 | size_t left; | |
499 | int count; | |
500 | u8 *pos; | |
501 | ||
3434fbd3 JB |
502 | if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED)) |
503 | return; | |
504 | ||
505 | if (!wmm_param) | |
506 | return; | |
507 | ||
f0706e82 JB |
508 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) |
509 | return; | |
510 | count = wmm_param[6] & 0x0f; | |
511 | if (count == ifsta->wmm_last_param_set) | |
512 | return; | |
513 | ifsta->wmm_last_param_set = count; | |
514 | ||
515 | pos = wmm_param + 8; | |
516 | left = wmm_param_len - 8; | |
517 | ||
518 | memset(¶ms, 0, sizeof(params)); | |
519 | ||
520 | if (!local->ops->conf_tx) | |
521 | return; | |
522 | ||
523 | local->wmm_acm = 0; | |
524 | for (; left >= 4; left -= 4, pos += 4) { | |
525 | int aci = (pos[0] >> 5) & 0x03; | |
526 | int acm = (pos[0] >> 4) & 0x01; | |
527 | int queue; | |
528 | ||
529 | switch (aci) { | |
530 | case 1: | |
e100bb64 | 531 | queue = 3; |
988c0f72 | 532 | if (acm) |
f0706e82 | 533 | local->wmm_acm |= BIT(0) | BIT(3); |
f0706e82 JB |
534 | break; |
535 | case 2: | |
e100bb64 | 536 | queue = 1; |
988c0f72 | 537 | if (acm) |
f0706e82 | 538 | local->wmm_acm |= BIT(4) | BIT(5); |
f0706e82 JB |
539 | break; |
540 | case 3: | |
e100bb64 | 541 | queue = 0; |
988c0f72 | 542 | if (acm) |
f0706e82 | 543 | local->wmm_acm |= BIT(6) | BIT(7); |
f0706e82 JB |
544 | break; |
545 | case 0: | |
546 | default: | |
e100bb64 | 547 | queue = 2; |
988c0f72 | 548 | if (acm) |
f0706e82 | 549 | local->wmm_acm |= BIT(1) | BIT(2); |
f0706e82 JB |
550 | break; |
551 | } | |
552 | ||
553 | params.aifs = pos[0] & 0x0f; | |
554 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); | |
555 | params.cw_min = ecw2cw(pos[1] & 0x0f); | |
f434b2d1 | 556 | params.txop = get_unaligned_le16(pos + 2); |
f4ea83dd | 557 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
f0706e82 | 558 | printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d " |
3330d7be | 559 | "cWmin=%d cWmax=%d txop=%d\n", |
f698d856 | 560 | local->mdev->name, queue, aci, acm, params.aifs, params.cw_min, |
3330d7be JB |
561 | params.cw_max, params.txop); |
562 | #endif | |
f0706e82 JB |
563 | /* TODO: handle ACM (block TX, fallback to next lowest allowed |
564 | * AC for now) */ | |
565 | if (local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) { | |
566 | printk(KERN_DEBUG "%s: failed to set TX queue " | |
f698d856 | 567 | "parameters for queue %d\n", local->mdev->name, queue); |
f0706e82 JB |
568 | } |
569 | } | |
570 | } | |
571 | ||
7a5158ef JB |
572 | static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, |
573 | u16 capab, bool erp_valid, u8 erp) | |
5628221c | 574 | { |
bda3933a | 575 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
ebd74487 | 576 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
5628221c | 577 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
ebd74487 | 578 | #endif |
471b3efd | 579 | u32 changed = 0; |
7a5158ef JB |
580 | bool use_protection; |
581 | bool use_short_preamble; | |
582 | bool use_short_slot; | |
583 | ||
584 | if (erp_valid) { | |
585 | use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; | |
586 | use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; | |
587 | } else { | |
588 | use_protection = false; | |
589 | use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); | |
590 | } | |
591 | ||
592 | use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); | |
5628221c | 593 | |
471b3efd | 594 | if (use_protection != bss_conf->use_cts_prot) { |
f4ea83dd | 595 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
5628221c | 596 | if (net_ratelimit()) { |
0c68ae26 | 597 | printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n", |
471b3efd | 598 | sdata->dev->name, |
5628221c | 599 | use_protection ? "enabled" : "disabled", |
0c68ae26 | 600 | ifsta->bssid); |
5628221c | 601 | } |
f4ea83dd | 602 | #endif |
471b3efd JB |
603 | bss_conf->use_cts_prot = use_protection; |
604 | changed |= BSS_CHANGED_ERP_CTS_PROT; | |
5628221c | 605 | } |
7e9ed188 | 606 | |
d43c7b37 | 607 | if (use_short_preamble != bss_conf->use_short_preamble) { |
f4ea83dd | 608 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
7e9ed188 DD |
609 | if (net_ratelimit()) { |
610 | printk(KERN_DEBUG "%s: switched to %s barker preamble" | |
0c68ae26 | 611 | " (BSSID=%pM)\n", |
471b3efd | 612 | sdata->dev->name, |
d43c7b37 | 613 | use_short_preamble ? "short" : "long", |
0c68ae26 | 614 | ifsta->bssid); |
7e9ed188 | 615 | } |
f4ea83dd | 616 | #endif |
d43c7b37 | 617 | bss_conf->use_short_preamble = use_short_preamble; |
471b3efd | 618 | changed |= BSS_CHANGED_ERP_PREAMBLE; |
7e9ed188 | 619 | } |
d9430a32 | 620 | |
7a5158ef JB |
621 | if (use_short_slot != bss_conf->use_short_slot) { |
622 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
623 | if (net_ratelimit()) { | |
624 | printk(KERN_DEBUG "%s: switched to %s slot" | |
625 | " (BSSID=%s)\n", | |
626 | sdata->dev->name, | |
627 | use_short_slot ? "short" : "long", | |
628 | ifsta->bssid); | |
629 | } | |
630 | #endif | |
631 | bss_conf->use_short_slot = use_short_slot; | |
632 | changed |= BSS_CHANGED_ERP_SLOT; | |
50c4afb9 JL |
633 | } |
634 | ||
635 | return changed; | |
636 | } | |
637 | ||
f5e5bf25 TW |
638 | static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata, |
639 | struct ieee80211_if_sta *ifsta) | |
640 | { | |
641 | union iwreq_data wrqu; | |
642 | memset(&wrqu, 0, sizeof(wrqu)); | |
643 | if (ifsta->flags & IEEE80211_STA_ASSOCIATED) | |
644 | memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN); | |
645 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; | |
646 | wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL); | |
647 | } | |
648 | ||
f698d856 | 649 | static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
650 | struct ieee80211_if_sta *ifsta) |
651 | { | |
74af0250 LT |
652 | char *buf; |
653 | size_t len; | |
654 | int i; | |
f0706e82 JB |
655 | union iwreq_data wrqu; |
656 | ||
74af0250 LT |
657 | if (!ifsta->assocreq_ies && !ifsta->assocresp_ies) |
658 | return; | |
659 | ||
660 | buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len + | |
661 | ifsta->assocresp_ies_len), GFP_KERNEL); | |
662 | if (!buf) | |
663 | return; | |
664 | ||
665 | len = sprintf(buf, "ASSOCINFO("); | |
f0706e82 | 666 | if (ifsta->assocreq_ies) { |
74af0250 LT |
667 | len += sprintf(buf + len, "ReqIEs="); |
668 | for (i = 0; i < ifsta->assocreq_ies_len; i++) { | |
669 | len += sprintf(buf + len, "%02x", | |
670 | ifsta->assocreq_ies[i]); | |
671 | } | |
f0706e82 | 672 | } |
087d833e | 673 | if (ifsta->assocresp_ies) { |
74af0250 LT |
674 | if (ifsta->assocreq_ies) |
675 | len += sprintf(buf + len, " "); | |
676 | len += sprintf(buf + len, "RespIEs="); | |
677 | for (i = 0; i < ifsta->assocresp_ies_len; i++) { | |
678 | len += sprintf(buf + len, "%02x", | |
679 | ifsta->assocresp_ies[i]); | |
680 | } | |
f0706e82 | 681 | } |
74af0250 LT |
682 | len += sprintf(buf + len, ")"); |
683 | ||
684 | if (len > IW_CUSTOM_MAX) { | |
685 | len = sprintf(buf, "ASSOCRESPIE="); | |
686 | for (i = 0; i < ifsta->assocresp_ies_len; i++) { | |
687 | len += sprintf(buf + len, "%02x", | |
688 | ifsta->assocresp_ies[i]); | |
689 | } | |
690 | } | |
691 | ||
ad788b5e JL |
692 | if (len <= IW_CUSTOM_MAX) { |
693 | memset(&wrqu, 0, sizeof(wrqu)); | |
694 | wrqu.data.length = len; | |
695 | wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf); | |
696 | } | |
74af0250 LT |
697 | |
698 | kfree(buf); | |
f0706e82 JB |
699 | } |
700 | ||
701 | ||
f698d856 | 702 | static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
ae5eb026 JB |
703 | struct ieee80211_if_sta *ifsta, |
704 | u32 bss_info_changed) | |
f0706e82 | 705 | { |
471b3efd | 706 | struct ieee80211_local *local = sdata->local; |
38668c05 | 707 | struct ieee80211_conf *conf = &local_to_hw(local)->conf; |
f0706e82 | 708 | |
c2b13452 | 709 | struct ieee80211_bss *bss; |
d6f2da5b | 710 | |
ae5eb026 | 711 | bss_info_changed |= BSS_CHANGED_ASSOC; |
f5e5bf25 | 712 | ifsta->flags |= IEEE80211_STA_ASSOCIATED; |
5628221c | 713 | |
05c914fe | 714 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
f5e5bf25 | 715 | return; |
21c0cbe7 | 716 | |
f5e5bf25 TW |
717 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
718 | conf->channel->center_freq, | |
719 | ifsta->ssid, ifsta->ssid_len); | |
720 | if (bss) { | |
721 | /* set timing information */ | |
bda3933a JB |
722 | sdata->vif.bss_conf.beacon_int = bss->beacon_int; |
723 | sdata->vif.bss_conf.timestamp = bss->timestamp; | |
724 | sdata->vif.bss_conf.dtim_period = bss->dtim_period; | |
21c0cbe7 | 725 | |
ae5eb026 | 726 | bss_info_changed |= ieee80211_handle_bss_capability(sdata, |
7a5158ef | 727 | bss->capability, bss->has_erp_value, bss->erp_value); |
9ac19a90 JB |
728 | |
729 | ieee80211_rx_bss_put(local, bss); | |
f0706e82 JB |
730 | } |
731 | ||
9ac19a90 JB |
732 | ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET; |
733 | memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN); | |
734 | ieee80211_sta_send_associnfo(sdata, ifsta); | |
9306102e | 735 | |
9ac19a90 JB |
736 | ifsta->last_probe = jiffies; |
737 | ieee80211_led_assoc(local, 1); | |
9306102e | 738 | |
bda3933a | 739 | sdata->vif.bss_conf.assoc = 1; |
96dd22ac JB |
740 | /* |
741 | * For now just always ask the driver to update the basic rateset | |
742 | * when we have associated, we aren't checking whether it actually | |
743 | * changed or not. | |
744 | */ | |
ae5eb026 JB |
745 | bss_info_changed |= BSS_CHANGED_BASIC_RATES; |
746 | ieee80211_bss_info_change_notify(sdata, bss_info_changed); | |
f0706e82 | 747 | |
9ac19a90 JB |
748 | netif_tx_start_all_queues(sdata->dev); |
749 | netif_carrier_on(sdata->dev); | |
f0706e82 | 750 | |
9ac19a90 | 751 | ieee80211_sta_send_apinfo(sdata, ifsta); |
f0706e82 JB |
752 | } |
753 | ||
9ac19a90 JB |
754 | static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata, |
755 | struct ieee80211_if_sta *ifsta) | |
f0706e82 | 756 | { |
9ac19a90 JB |
757 | ifsta->direct_probe_tries++; |
758 | if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0c68ae26 JB |
759 | printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n", |
760 | sdata->dev->name, ifsta->bssid); | |
9ac19a90 | 761 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
4a68ec53 | 762 | ieee80211_sta_send_apinfo(sdata, ifsta); |
f0706e82 JB |
763 | return; |
764 | } | |
f0706e82 | 765 | |
0c68ae26 JB |
766 | printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n", |
767 | sdata->dev->name, ifsta->bssid, | |
9ac19a90 | 768 | ifsta->direct_probe_tries); |
f0706e82 | 769 | |
9ac19a90 | 770 | ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
f0706e82 | 771 | |
9ac19a90 JB |
772 | set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request); |
773 | ||
774 | /* Direct probe is sent to broadcast address as some APs | |
775 | * will not answer to direct packet in unassociated state. | |
776 | */ | |
777 | ieee80211_send_probe_req(sdata, NULL, | |
778 | ifsta->ssid, ifsta->ssid_len); | |
779 | ||
780 | mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT); | |
60f8b39c | 781 | } |
f0706e82 | 782 | |
9ac19a90 JB |
783 | |
784 | static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata, | |
785 | struct ieee80211_if_sta *ifsta) | |
f0706e82 | 786 | { |
9ac19a90 JB |
787 | ifsta->auth_tries++; |
788 | if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0c68ae26 | 789 | printk(KERN_DEBUG "%s: authentication with AP %pM" |
9ac19a90 | 790 | " timed out\n", |
0c68ae26 | 791 | sdata->dev->name, ifsta->bssid); |
9ac19a90 | 792 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
4a68ec53 | 793 | ieee80211_sta_send_apinfo(sdata, ifsta); |
f0706e82 JB |
794 | return; |
795 | } | |
f0706e82 | 796 | |
9ac19a90 | 797 | ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE; |
0c68ae26 JB |
798 | printk(KERN_DEBUG "%s: authenticate with AP %pM\n", |
799 | sdata->dev->name, ifsta->bssid); | |
f0706e82 | 800 | |
9ac19a90 JB |
801 | ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0); |
802 | ||
803 | mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT); | |
f0706e82 JB |
804 | } |
805 | ||
aa458d17 TW |
806 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, |
807 | struct ieee80211_if_sta *ifsta, bool deauth, | |
808 | bool self_disconnected, u16 reason) | |
809 | { | |
810 | struct ieee80211_local *local = sdata->local; | |
811 | struct sta_info *sta; | |
ae5eb026 | 812 | u32 changed = 0; |
aa458d17 TW |
813 | |
814 | rcu_read_lock(); | |
815 | ||
816 | sta = sta_info_get(local, ifsta->bssid); | |
817 | if (!sta) { | |
818 | rcu_read_unlock(); | |
819 | return; | |
820 | } | |
821 | ||
822 | if (deauth) { | |
823 | ifsta->direct_probe_tries = 0; | |
824 | ifsta->auth_tries = 0; | |
825 | } | |
826 | ifsta->assoc_scan_tries = 0; | |
827 | ifsta->assoc_tries = 0; | |
828 | ||
24e64622 | 829 | netif_tx_stop_all_queues(sdata->dev); |
aa458d17 TW |
830 | netif_carrier_off(sdata->dev); |
831 | ||
17741cdc | 832 | ieee80211_sta_tear_down_BA_sessions(sdata, sta->sta.addr); |
aa458d17 TW |
833 | |
834 | if (self_disconnected) { | |
835 | if (deauth) | |
ef422bc0 JB |
836 | ieee80211_send_deauth_disassoc(sdata, |
837 | IEEE80211_STYPE_DEAUTH, reason); | |
aa458d17 | 838 | else |
ef422bc0 JB |
839 | ieee80211_send_deauth_disassoc(sdata, |
840 | IEEE80211_STYPE_DISASSOC, reason); | |
aa458d17 TW |
841 | } |
842 | ||
f5e5bf25 TW |
843 | ifsta->flags &= ~IEEE80211_STA_ASSOCIATED; |
844 | changed |= ieee80211_reset_erp_info(sdata); | |
845 | ||
f5e5bf25 | 846 | ieee80211_led_assoc(local, 0); |
ae5eb026 JB |
847 | changed |= BSS_CHANGED_ASSOC; |
848 | sdata->vif.bss_conf.assoc = false; | |
f5e5bf25 TW |
849 | |
850 | ieee80211_sta_send_apinfo(sdata, ifsta); | |
aa458d17 TW |
851 | |
852 | if (self_disconnected) | |
853 | ifsta->state = IEEE80211_STA_MLME_DISABLED; | |
854 | ||
855 | sta_info_unlink(&sta); | |
856 | ||
857 | rcu_read_unlock(); | |
858 | ||
859 | sta_info_destroy(sta); | |
ae5eb026 JB |
860 | |
861 | local->hw.conf.ht.enabled = false; | |
862 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_HT); | |
863 | ||
864 | ieee80211_bss_info_change_notify(sdata, changed); | |
aa458d17 | 865 | } |
f0706e82 | 866 | |
9ac19a90 JB |
867 | static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata) |
868 | { | |
869 | if (!sdata || !sdata->default_key || | |
870 | sdata->default_key->conf.alg != ALG_WEP) | |
871 | return 0; | |
872 | return 1; | |
873 | } | |
874 | ||
f698d856 | 875 | static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
876 | struct ieee80211_if_sta *ifsta) |
877 | { | |
f698d856 | 878 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 879 | struct ieee80211_bss *bss; |
5b98b1f7 JB |
880 | int bss_privacy; |
881 | int wep_privacy; | |
882 | int privacy_invoked; | |
f0706e82 | 883 | |
5b98b1f7 | 884 | if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL)) |
f0706e82 JB |
885 | return 0; |
886 | ||
f698d856 | 887 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
8318d78a | 888 | local->hw.conf.channel->center_freq, |
cffdd30d | 889 | ifsta->ssid, ifsta->ssid_len); |
f0706e82 JB |
890 | if (!bss) |
891 | return 0; | |
892 | ||
5b98b1f7 | 893 | bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY); |
f698d856 | 894 | wep_privacy = !!ieee80211_sta_wep_configured(sdata); |
5b98b1f7 | 895 | privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED); |
f0706e82 | 896 | |
3e122be0 | 897 | ieee80211_rx_bss_put(local, bss); |
f0706e82 | 898 | |
5b98b1f7 JB |
899 | if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked)) |
900 | return 0; | |
901 | ||
902 | return 1; | |
f0706e82 JB |
903 | } |
904 | ||
f698d856 | 905 | static void ieee80211_associate(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
906 | struct ieee80211_if_sta *ifsta) |
907 | { | |
908 | ifsta->assoc_tries++; | |
909 | if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) { | |
0c68ae26 | 910 | printk(KERN_DEBUG "%s: association with AP %pM" |
f0706e82 | 911 | " timed out\n", |
0c68ae26 | 912 | sdata->dev->name, ifsta->bssid); |
48c2fc59 | 913 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
4a68ec53 | 914 | ieee80211_sta_send_apinfo(sdata, ifsta); |
f0706e82 JB |
915 | return; |
916 | } | |
917 | ||
48c2fc59 | 918 | ifsta->state = IEEE80211_STA_MLME_ASSOCIATE; |
0c68ae26 JB |
919 | printk(KERN_DEBUG "%s: associate with AP %pM\n", |
920 | sdata->dev->name, ifsta->bssid); | |
f698d856 | 921 | if (ieee80211_privacy_mismatch(sdata, ifsta)) { |
f0706e82 | 922 | printk(KERN_DEBUG "%s: mismatch in privacy configuration and " |
f698d856 | 923 | "mixed-cell disabled - abort association\n", sdata->dev->name); |
48c2fc59 | 924 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
f0706e82 JB |
925 | return; |
926 | } | |
927 | ||
f698d856 | 928 | ieee80211_send_assoc(sdata, ifsta); |
f0706e82 JB |
929 | |
930 | mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT); | |
931 | } | |
932 | ||
933 | ||
f698d856 | 934 | static void ieee80211_associated(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
935 | struct ieee80211_if_sta *ifsta) |
936 | { | |
f698d856 | 937 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
938 | struct sta_info *sta; |
939 | int disassoc; | |
940 | ||
941 | /* TODO: start monitoring current AP signal quality and number of | |
942 | * missed beacons. Scan other channels every now and then and search | |
943 | * for better APs. */ | |
944 | /* TODO: remove expired BSSes */ | |
945 | ||
48c2fc59 | 946 | ifsta->state = IEEE80211_STA_MLME_ASSOCIATED; |
f0706e82 | 947 | |
d0709a65 JB |
948 | rcu_read_lock(); |
949 | ||
f0706e82 JB |
950 | sta = sta_info_get(local, ifsta->bssid); |
951 | if (!sta) { | |
0c68ae26 JB |
952 | printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n", |
953 | sdata->dev->name, ifsta->bssid); | |
f0706e82 JB |
954 | disassoc = 1; |
955 | } else { | |
956 | disassoc = 0; | |
957 | if (time_after(jiffies, | |
958 | sta->last_rx + IEEE80211_MONITORING_INTERVAL)) { | |
d6f2da5b | 959 | if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) { |
f0706e82 | 960 | printk(KERN_DEBUG "%s: No ProbeResp from " |
0c68ae26 | 961 | "current AP %pM - assume out of " |
f0706e82 | 962 | "range\n", |
0c68ae26 | 963 | sdata->dev->name, ifsta->bssid); |
f0706e82 | 964 | disassoc = 1; |
d6f2da5b | 965 | } else |
f698d856 | 966 | ieee80211_send_probe_req(sdata, ifsta->bssid, |
4dfe51e1 JB |
967 | ifsta->ssid, |
968 | ifsta->ssid_len); | |
d6f2da5b | 969 | ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL; |
f0706e82 | 970 | } else { |
d6f2da5b | 971 | ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL; |
f0706e82 JB |
972 | if (time_after(jiffies, ifsta->last_probe + |
973 | IEEE80211_PROBE_INTERVAL)) { | |
974 | ifsta->last_probe = jiffies; | |
f698d856 | 975 | ieee80211_send_probe_req(sdata, ifsta->bssid, |
f0706e82 JB |
976 | ifsta->ssid, |
977 | ifsta->ssid_len); | |
978 | } | |
979 | } | |
f0706e82 | 980 | } |
d0709a65 JB |
981 | |
982 | rcu_read_unlock(); | |
983 | ||
60f8b39c JB |
984 | if (disassoc) |
985 | ieee80211_set_disassoc(sdata, ifsta, true, true, | |
986 | WLAN_REASON_PREV_AUTH_NOT_VALID); | |
987 | else | |
988 | mod_timer(&ifsta->timer, jiffies + | |
989 | IEEE80211_MONITORING_INTERVAL); | |
f0706e82 JB |
990 | } |
991 | ||
992 | ||
f698d856 | 993 | static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
994 | struct ieee80211_if_sta *ifsta) |
995 | { | |
f698d856 | 996 | printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name); |
d6f2da5b | 997 | ifsta->flags |= IEEE80211_STA_AUTHENTICATED; |
f698d856 | 998 | ieee80211_associate(sdata, ifsta); |
f0706e82 JB |
999 | } |
1000 | ||
1001 | ||
f698d856 | 1002 | static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1003 | struct ieee80211_if_sta *ifsta, |
1004 | struct ieee80211_mgmt *mgmt, | |
1005 | size_t len) | |
1006 | { | |
1007 | u8 *pos; | |
1008 | struct ieee802_11_elems elems; | |
1009 | ||
f0706e82 | 1010 | pos = mgmt->u.auth.variable; |
67a4cce4 | 1011 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
f4ea83dd | 1012 | if (!elems.challenge) |
f0706e82 | 1013 | return; |
f698d856 | 1014 | ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2, |
f0706e82 JB |
1015 | elems.challenge_len + 2, 1); |
1016 | } | |
1017 | ||
f698d856 | 1018 | static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1019 | struct ieee80211_if_sta *ifsta, |
1020 | struct ieee80211_mgmt *mgmt, | |
1021 | size_t len) | |
1022 | { | |
f0706e82 JB |
1023 | u16 auth_alg, auth_transaction, status_code; |
1024 | ||
48c2fc59 | 1025 | if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE && |
05c914fe | 1026 | sdata->vif.type != NL80211_IFTYPE_ADHOC) |
f0706e82 | 1027 | return; |
f0706e82 | 1028 | |
f4ea83dd | 1029 | if (len < 24 + 6) |
f0706e82 | 1030 | return; |
f0706e82 | 1031 | |
05c914fe | 1032 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC && |
f4ea83dd | 1033 | memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1034 | return; |
f0706e82 | 1035 | |
05c914fe | 1036 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC && |
f4ea83dd | 1037 | memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) |
f0706e82 | 1038 | return; |
f0706e82 JB |
1039 | |
1040 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
1041 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
1042 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
1043 | ||
05c914fe | 1044 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
135a2110 JB |
1045 | /* |
1046 | * IEEE 802.11 standard does not require authentication in IBSS | |
f0706e82 JB |
1047 | * networks and most implementations do not seem to use it. |
1048 | * However, try to reply to authentication attempts if someone | |
1049 | * has actually implemented this. | |
135a2110 | 1050 | */ |
f4ea83dd | 1051 | if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) |
f0706e82 | 1052 | return; |
f698d856 | 1053 | ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0); |
f0706e82 JB |
1054 | } |
1055 | ||
1056 | if (auth_alg != ifsta->auth_alg || | |
f4ea83dd | 1057 | auth_transaction != ifsta->auth_transaction) |
f0706e82 | 1058 | return; |
f0706e82 JB |
1059 | |
1060 | if (status_code != WLAN_STATUS_SUCCESS) { | |
f0706e82 JB |
1061 | if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) { |
1062 | u8 algs[3]; | |
1063 | const int num_algs = ARRAY_SIZE(algs); | |
1064 | int i, pos; | |
1065 | algs[0] = algs[1] = algs[2] = 0xff; | |
1066 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
1067 | algs[0] = WLAN_AUTH_OPEN; | |
1068 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
1069 | algs[1] = WLAN_AUTH_SHARED_KEY; | |
1070 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
1071 | algs[2] = WLAN_AUTH_LEAP; | |
1072 | if (ifsta->auth_alg == WLAN_AUTH_OPEN) | |
1073 | pos = 0; | |
1074 | else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY) | |
1075 | pos = 1; | |
1076 | else | |
1077 | pos = 2; | |
1078 | for (i = 0; i < num_algs; i++) { | |
1079 | pos++; | |
1080 | if (pos >= num_algs) | |
1081 | pos = 0; | |
1082 | if (algs[pos] == ifsta->auth_alg || | |
1083 | algs[pos] == 0xff) | |
1084 | continue; | |
1085 | if (algs[pos] == WLAN_AUTH_SHARED_KEY && | |
f698d856 | 1086 | !ieee80211_sta_wep_configured(sdata)) |
f0706e82 JB |
1087 | continue; |
1088 | ifsta->auth_alg = algs[pos]; | |
f0706e82 JB |
1089 | break; |
1090 | } | |
1091 | } | |
1092 | return; | |
1093 | } | |
1094 | ||
1095 | switch (ifsta->auth_alg) { | |
1096 | case WLAN_AUTH_OPEN: | |
1097 | case WLAN_AUTH_LEAP: | |
f698d856 | 1098 | ieee80211_auth_completed(sdata, ifsta); |
f0706e82 JB |
1099 | break; |
1100 | case WLAN_AUTH_SHARED_KEY: | |
1101 | if (ifsta->auth_transaction == 4) | |
f698d856 | 1102 | ieee80211_auth_completed(sdata, ifsta); |
f0706e82 | 1103 | else |
f698d856 | 1104 | ieee80211_auth_challenge(sdata, ifsta, mgmt, len); |
f0706e82 JB |
1105 | break; |
1106 | } | |
1107 | } | |
1108 | ||
1109 | ||
f698d856 | 1110 | static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1111 | struct ieee80211_if_sta *ifsta, |
1112 | struct ieee80211_mgmt *mgmt, | |
1113 | size_t len) | |
1114 | { | |
1115 | u16 reason_code; | |
1116 | ||
f4ea83dd | 1117 | if (len < 24 + 2) |
f0706e82 | 1118 | return; |
f0706e82 | 1119 | |
f4ea83dd | 1120 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1121 | return; |
f0706e82 JB |
1122 | |
1123 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
1124 | ||
988c0f72 | 1125 | if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) |
f698d856 | 1126 | printk(KERN_DEBUG "%s: deauthenticated\n", sdata->dev->name); |
f0706e82 | 1127 | |
48c2fc59 TW |
1128 | if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE || |
1129 | ifsta->state == IEEE80211_STA_MLME_ASSOCIATE || | |
1130 | ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) { | |
9859b81e | 1131 | ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
f0706e82 JB |
1132 | mod_timer(&ifsta->timer, jiffies + |
1133 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1134 | } | |
1135 | ||
aa458d17 | 1136 | ieee80211_set_disassoc(sdata, ifsta, true, false, 0); |
d6f2da5b | 1137 | ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED; |
f0706e82 JB |
1138 | } |
1139 | ||
1140 | ||
f698d856 | 1141 | static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1142 | struct ieee80211_if_sta *ifsta, |
1143 | struct ieee80211_mgmt *mgmt, | |
1144 | size_t len) | |
1145 | { | |
1146 | u16 reason_code; | |
1147 | ||
f4ea83dd | 1148 | if (len < 24 + 2) |
f0706e82 | 1149 | return; |
f0706e82 | 1150 | |
f4ea83dd | 1151 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1152 | return; |
f0706e82 JB |
1153 | |
1154 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
1155 | ||
d6f2da5b | 1156 | if (ifsta->flags & IEEE80211_STA_ASSOCIATED) |
f698d856 | 1157 | printk(KERN_DEBUG "%s: disassociated\n", sdata->dev->name); |
f0706e82 | 1158 | |
48c2fc59 TW |
1159 | if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) { |
1160 | ifsta->state = IEEE80211_STA_MLME_ASSOCIATE; | |
f0706e82 JB |
1161 | mod_timer(&ifsta->timer, jiffies + |
1162 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1163 | } | |
1164 | ||
aa458d17 | 1165 | ieee80211_set_disassoc(sdata, ifsta, false, false, 0); |
f0706e82 JB |
1166 | } |
1167 | ||
1168 | ||
471b3efd | 1169 | static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1170 | struct ieee80211_if_sta *ifsta, |
1171 | struct ieee80211_mgmt *mgmt, | |
1172 | size_t len, | |
1173 | int reassoc) | |
1174 | { | |
471b3efd | 1175 | struct ieee80211_local *local = sdata->local; |
8318d78a | 1176 | struct ieee80211_supported_band *sband; |
f0706e82 | 1177 | struct sta_info *sta; |
8318d78a | 1178 | u64 rates, basic_rates; |
f0706e82 JB |
1179 | u16 capab_info, status_code, aid; |
1180 | struct ieee802_11_elems elems; | |
bda3933a | 1181 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
f0706e82 | 1182 | u8 *pos; |
ae5eb026 | 1183 | u32 changed = 0; |
f0706e82 | 1184 | int i, j; |
ddf4ac53 | 1185 | bool have_higher_than_11mbit = false, newsta = false; |
ae5eb026 | 1186 | u16 ap_ht_cap_flags; |
f0706e82 JB |
1187 | |
1188 | /* AssocResp and ReassocResp have identical structure, so process both | |
1189 | * of them in this function. */ | |
1190 | ||
48c2fc59 | 1191 | if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE) |
f0706e82 | 1192 | return; |
f0706e82 | 1193 | |
f4ea83dd | 1194 | if (len < 24 + 6) |
f0706e82 | 1195 | return; |
f0706e82 | 1196 | |
f4ea83dd | 1197 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1198 | return; |
f0706e82 JB |
1199 | |
1200 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
1201 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
1202 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
f0706e82 | 1203 | |
0c68ae26 | 1204 | printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x " |
f0706e82 | 1205 | "status=%d aid=%d)\n", |
0c68ae26 | 1206 | sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa, |
ddd68587 | 1207 | capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); |
f0706e82 JB |
1208 | |
1209 | if (status_code != WLAN_STATUS_SUCCESS) { | |
1210 | printk(KERN_DEBUG "%s: AP denied association (code=%d)\n", | |
f698d856 | 1211 | sdata->dev->name, status_code); |
8a69aa93 DD |
1212 | /* if this was a reassociation, ensure we try a "full" |
1213 | * association next time. This works around some broken APs | |
1214 | * which do not correctly reject reassociation requests. */ | |
d6f2da5b | 1215 | ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
f0706e82 JB |
1216 | return; |
1217 | } | |
1218 | ||
1dd84aa2 JB |
1219 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
1220 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " | |
f698d856 | 1221 | "set\n", sdata->dev->name, aid); |
1dd84aa2 JB |
1222 | aid &= ~(BIT(15) | BIT(14)); |
1223 | ||
f0706e82 | 1224 | pos = mgmt->u.assoc_resp.variable; |
67a4cce4 | 1225 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
f0706e82 JB |
1226 | |
1227 | if (!elems.supp_rates) { | |
1228 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", | |
f698d856 | 1229 | sdata->dev->name); |
f0706e82 JB |
1230 | return; |
1231 | } | |
1232 | ||
f698d856 | 1233 | printk(KERN_DEBUG "%s: associated\n", sdata->dev->name); |
f0706e82 JB |
1234 | ifsta->aid = aid; |
1235 | ifsta->ap_capab = capab_info; | |
1236 | ||
1237 | kfree(ifsta->assocresp_ies); | |
1238 | ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt); | |
0ec0b7ac | 1239 | ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL); |
f0706e82 JB |
1240 | if (ifsta->assocresp_ies) |
1241 | memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len); | |
1242 | ||
d0709a65 JB |
1243 | rcu_read_lock(); |
1244 | ||
f0706e82 JB |
1245 | /* Add STA entry for the AP */ |
1246 | sta = sta_info_get(local, ifsta->bssid); | |
1247 | if (!sta) { | |
c2b13452 | 1248 | struct ieee80211_bss *bss; |
ddf4ac53 JB |
1249 | |
1250 | newsta = true; | |
d0709a65 | 1251 | |
73651ee6 JB |
1252 | sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC); |
1253 | if (!sta) { | |
1254 | printk(KERN_DEBUG "%s: failed to alloc STA entry for" | |
f698d856 | 1255 | " the AP\n", sdata->dev->name); |
d0709a65 | 1256 | rcu_read_unlock(); |
f0706e82 JB |
1257 | return; |
1258 | } | |
60f8b39c JB |
1259 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
1260 | local->hw.conf.channel->center_freq, | |
1261 | ifsta->ssid, ifsta->ssid_len); | |
1262 | if (bss) { | |
1263 | sta->last_signal = bss->signal; | |
1264 | sta->last_qual = bss->qual; | |
1265 | sta->last_noise = bss->noise; | |
1266 | ieee80211_rx_bss_put(local, bss); | |
1267 | } | |
f709fc69 | 1268 | |
60f8b39c JB |
1269 | /* update new sta with its last rx activity */ |
1270 | sta->last_rx = jiffies; | |
f709fc69 | 1271 | } |
f709fc69 | 1272 | |
60f8b39c JB |
1273 | /* |
1274 | * FIXME: Do we really need to update the sta_info's information here? | |
1275 | * We already know about the AP (we found it in our list) so it | |
1276 | * should already be filled with the right info, no? | |
1277 | * As is stands, all this is racy because typically we assume | |
1278 | * the information that is filled in here (except flags) doesn't | |
1279 | * change while a STA structure is alive. As such, it should move | |
1280 | * to between the sta_info_alloc() and sta_info_insert() above. | |
1281 | */ | |
f709fc69 | 1282 | |
60f8b39c JB |
1283 | set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP | |
1284 | WLAN_STA_AUTHORIZED); | |
05e5e883 | 1285 | |
60f8b39c JB |
1286 | rates = 0; |
1287 | basic_rates = 0; | |
1288 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
f709fc69 | 1289 | |
60f8b39c JB |
1290 | for (i = 0; i < elems.supp_rates_len; i++) { |
1291 | int rate = (elems.supp_rates[i] & 0x7f) * 5; | |
f709fc69 | 1292 | |
60f8b39c JB |
1293 | if (rate > 110) |
1294 | have_higher_than_11mbit = true; | |
1295 | ||
1296 | for (j = 0; j < sband->n_bitrates; j++) { | |
1297 | if (sband->bitrates[j].bitrate == rate) | |
1298 | rates |= BIT(j); | |
1299 | if (elems.supp_rates[i] & 0x80) | |
1300 | basic_rates |= BIT(j); | |
f709fc69 | 1301 | } |
f709fc69 LCC |
1302 | } |
1303 | ||
60f8b39c JB |
1304 | for (i = 0; i < elems.ext_supp_rates_len; i++) { |
1305 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; | |
f0706e82 | 1306 | |
60f8b39c JB |
1307 | if (rate > 110) |
1308 | have_higher_than_11mbit = true; | |
f0706e82 | 1309 | |
60f8b39c JB |
1310 | for (j = 0; j < sband->n_bitrates; j++) { |
1311 | if (sband->bitrates[j].bitrate == rate) | |
1312 | rates |= BIT(j); | |
1313 | if (elems.ext_supp_rates[i] & 0x80) | |
1314 | basic_rates |= BIT(j); | |
1315 | } | |
1ebebea8 | 1316 | } |
f0706e82 | 1317 | |
323ce79a | 1318 | sta->sta.supp_rates[local->hw.conf.channel->band] = rates; |
bda3933a | 1319 | sdata->vif.bss_conf.basic_rates = basic_rates; |
60f8b39c JB |
1320 | |
1321 | /* cf. IEEE 802.11 9.2.12 */ | |
1322 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
1323 | have_higher_than_11mbit) | |
1324 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
1325 | else | |
1326 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
f0706e82 | 1327 | |
ae5eb026 JB |
1328 | if (elems.ht_cap_elem) |
1329 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, | |
d9fe60de | 1330 | elems.ht_cap_elem, &sta->sta.ht_cap); |
ae5eb026 JB |
1331 | |
1332 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
f0706e82 | 1333 | |
4b7679a5 | 1334 | rate_control_rate_init(sta); |
f0706e82 | 1335 | |
ddf4ac53 | 1336 | if (elems.wmm_param) |
60f8b39c | 1337 | set_sta_flags(sta, WLAN_STA_WME); |
ddf4ac53 JB |
1338 | |
1339 | if (newsta) { | |
1340 | int err = sta_info_insert(sta); | |
1341 | if (err) { | |
1342 | printk(KERN_DEBUG "%s: failed to insert STA entry for" | |
1343 | " the AP (error %d)\n", sdata->dev->name, err); | |
1344 | rcu_read_unlock(); | |
1345 | return; | |
1346 | } | |
1347 | } | |
1348 | ||
1349 | rcu_read_unlock(); | |
1350 | ||
1351 | if (elems.wmm_param) | |
60f8b39c JB |
1352 | ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param, |
1353 | elems.wmm_param_len); | |
f0706e82 | 1354 | |
ae5eb026 JB |
1355 | if (elems.ht_info_elem && elems.wmm_param && |
1356 | (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) | |
1357 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, | |
1358 | ap_ht_cap_flags); | |
1359 | ||
60f8b39c JB |
1360 | /* set AID and assoc capability, |
1361 | * ieee80211_set_associated() will tell the driver */ | |
1362 | bss_conf->aid = aid; | |
1363 | bss_conf->assoc_capability = capab_info; | |
ae5eb026 | 1364 | ieee80211_set_associated(sdata, ifsta, changed); |
f0706e82 | 1365 | |
60f8b39c | 1366 | ieee80211_associated(sdata, ifsta); |
f0706e82 JB |
1367 | } |
1368 | ||
1369 | ||
f698d856 | 1370 | static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, |
a607268a | 1371 | struct ieee80211_if_sta *ifsta, |
c2b13452 | 1372 | struct ieee80211_bss *bss) |
a607268a | 1373 | { |
f698d856 | 1374 | struct ieee80211_local *local = sdata->local; |
a607268a BR |
1375 | int res, rates, i, j; |
1376 | struct sk_buff *skb; | |
1377 | struct ieee80211_mgmt *mgmt; | |
a607268a | 1378 | u8 *pos; |
a607268a | 1379 | struct ieee80211_supported_band *sband; |
507b06d0 | 1380 | union iwreq_data wrqu; |
a607268a | 1381 | |
e2ef12d3 RR |
1382 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400); |
1383 | if (!skb) { | |
1384 | printk(KERN_DEBUG "%s: failed to allocate buffer for probe " | |
1385 | "response\n", sdata->dev->name); | |
1386 | return -ENOMEM; | |
1387 | } | |
1388 | ||
a607268a BR |
1389 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
1390 | ||
1391 | /* Remove possible STA entries from other IBSS networks. */ | |
dc6676b7 | 1392 | sta_info_flush_delayed(sdata); |
a607268a BR |
1393 | |
1394 | if (local->ops->reset_tsf) { | |
1395 | /* Reset own TSF to allow time synchronization work. */ | |
1396 | local->ops->reset_tsf(local_to_hw(local)); | |
1397 | } | |
1398 | memcpy(ifsta->bssid, bss->bssid, ETH_ALEN); | |
9d139c81 | 1399 | res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID); |
a607268a BR |
1400 | if (res) |
1401 | return res; | |
1402 | ||
1403 | local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10; | |
1404 | ||
a607268a BR |
1405 | sdata->drop_unencrypted = bss->capability & |
1406 | WLAN_CAPABILITY_PRIVACY ? 1 : 0; | |
1407 | ||
f698d856 | 1408 | res = ieee80211_set_freq(sdata, bss->freq); |
a607268a | 1409 | |
be038b37 AK |
1410 | if (res) |
1411 | return res; | |
a607268a | 1412 | |
9d139c81 | 1413 | /* Build IBSS probe response */ |
a607268a | 1414 | |
e2ef12d3 | 1415 | skb_reserve(skb, local->hw.extra_tx_headroom); |
a607268a | 1416 | |
e2ef12d3 RR |
1417 | mgmt = (struct ieee80211_mgmt *) |
1418 | skb_put(skb, 24 + sizeof(mgmt->u.beacon)); | |
1419 | memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon)); | |
1420 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
1421 | IEEE80211_STYPE_PROBE_RESP); | |
1422 | memset(mgmt->da, 0xff, ETH_ALEN); | |
1423 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); | |
1424 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
1425 | mgmt->u.beacon.beacon_int = | |
1426 | cpu_to_le16(local->hw.conf.beacon_int); | |
1427 | mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp); | |
1428 | mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability); | |
a607268a | 1429 | |
e2ef12d3 RR |
1430 | pos = skb_put(skb, 2 + ifsta->ssid_len); |
1431 | *pos++ = WLAN_EID_SSID; | |
1432 | *pos++ = ifsta->ssid_len; | |
1433 | memcpy(pos, ifsta->ssid, ifsta->ssid_len); | |
a607268a | 1434 | |
e2ef12d3 RR |
1435 | rates = bss->supp_rates_len; |
1436 | if (rates > 8) | |
1437 | rates = 8; | |
1438 | pos = skb_put(skb, 2 + rates); | |
1439 | *pos++ = WLAN_EID_SUPP_RATES; | |
1440 | *pos++ = rates; | |
1441 | memcpy(pos, bss->supp_rates, rates); | |
1442 | ||
1443 | if (bss->band == IEEE80211_BAND_2GHZ) { | |
1444 | pos = skb_put(skb, 2 + 1); | |
1445 | *pos++ = WLAN_EID_DS_PARAMS; | |
1446 | *pos++ = 1; | |
1447 | *pos++ = ieee80211_frequency_to_channel(bss->freq); | |
1448 | } | |
a607268a | 1449 | |
e2ef12d3 RR |
1450 | pos = skb_put(skb, 2 + 2); |
1451 | *pos++ = WLAN_EID_IBSS_PARAMS; | |
1452 | *pos++ = 2; | |
1453 | /* FIX: set ATIM window based on scan results */ | |
1454 | *pos++ = 0; | |
1455 | *pos++ = 0; | |
e039fa4a | 1456 | |
e2ef12d3 RR |
1457 | if (bss->supp_rates_len > 8) { |
1458 | rates = bss->supp_rates_len - 8; | |
1459 | pos = skb_put(skb, 2 + rates); | |
1460 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
1461 | *pos++ = rates; | |
1462 | memcpy(pos, &bss->supp_rates[8], rates); | |
9d139c81 | 1463 | } |
a607268a | 1464 | |
e2ef12d3 RR |
1465 | ifsta->probe_resp = skb; |
1466 | ||
1467 | ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON); | |
1468 | ||
1469 | ||
9d139c81 JB |
1470 | rates = 0; |
1471 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1472 | for (i = 0; i < bss->supp_rates_len; i++) { | |
1473 | int bitrate = (bss->supp_rates[i] & 0x7f) * 5; | |
1474 | for (j = 0; j < sband->n_bitrates; j++) | |
1475 | if (sband->bitrates[j].bitrate == bitrate) | |
1476 | rates |= BIT(j); | |
a607268a | 1477 | } |
9d139c81 JB |
1478 | ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates; |
1479 | ||
b079ada7 | 1480 | ieee80211_sta_def_wmm_params(sdata, bss); |
a607268a | 1481 | |
48c2fc59 | 1482 | ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED; |
a607268a BR |
1483 | mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); |
1484 | ||
4492bea6 EG |
1485 | ieee80211_led_assoc(local, true); |
1486 | ||
507b06d0 DW |
1487 | memset(&wrqu, 0, sizeof(wrqu)); |
1488 | memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN); | |
f698d856 | 1489 | wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL); |
a607268a BR |
1490 | |
1491 | return res; | |
1492 | } | |
1493 | ||
98c8fccf JB |
1494 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
1495 | struct ieee80211_mgmt *mgmt, | |
1496 | size_t len, | |
1497 | struct ieee80211_rx_status *rx_status, | |
1498 | struct ieee802_11_elems *elems, | |
1499 | bool beacon) | |
1500 | { | |
1501 | struct ieee80211_local *local = sdata->local; | |
1502 | int freq; | |
c2b13452 | 1503 | struct ieee80211_bss *bss; |
98c8fccf JB |
1504 | struct sta_info *sta; |
1505 | struct ieee80211_channel *channel; | |
1506 | u64 beacon_timestamp, rx_timestamp; | |
1507 | u64 supp_rates = 0; | |
1508 | enum ieee80211_band band = rx_status->band; | |
98c8fccf JB |
1509 | |
1510 | if (elems->ds_params && elems->ds_params_len == 1) | |
1511 | freq = ieee80211_channel_to_frequency(elems->ds_params[0]); | |
1512 | else | |
1513 | freq = rx_status->freq; | |
1514 | ||
1515 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
1516 | ||
1517 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
1518 | return; | |
1519 | ||
05c914fe | 1520 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && elems->supp_rates && |
98c8fccf JB |
1521 | memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) { |
1522 | supp_rates = ieee80211_sta_get_rates(local, elems, band); | |
1523 | ||
1524 | rcu_read_lock(); | |
1525 | ||
1526 | sta = sta_info_get(local, mgmt->sa); | |
1527 | if (sta) { | |
1528 | u64 prev_rates; | |
1529 | ||
323ce79a | 1530 | prev_rates = sta->sta.supp_rates[band]; |
98c8fccf | 1531 | /* make sure mandatory rates are always added */ |
323ce79a | 1532 | sta->sta.supp_rates[band] = supp_rates | |
96dd22ac | 1533 | ieee80211_mandatory_rates(local, band); |
98c8fccf JB |
1534 | |
1535 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
323ce79a | 1536 | if (sta->sta.supp_rates[band] != prev_rates) |
98c8fccf | 1537 | printk(KERN_DEBUG "%s: updated supp_rates set " |
0c68ae26 | 1538 | "for %pM based on beacon info (0x%llx | " |
98c8fccf | 1539 | "0x%llx -> 0x%llx)\n", |
17741cdc | 1540 | sdata->dev->name, |
0c68ae26 | 1541 | sta->sta.addr, |
98c8fccf JB |
1542 | (unsigned long long) prev_rates, |
1543 | (unsigned long long) supp_rates, | |
323ce79a | 1544 | (unsigned long long) sta->sta.supp_rates[band]); |
98c8fccf JB |
1545 | #endif |
1546 | } else { | |
1547 | ieee80211_ibss_add_sta(sdata, NULL, mgmt->bssid, | |
1548 | mgmt->sa, supp_rates); | |
1549 | } | |
1550 | ||
1551 | rcu_read_unlock(); | |
1552 | } | |
1553 | ||
1554 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, | |
1555 | freq, beacon); | |
1556 | if (!bss) | |
1557 | return; | |
1558 | ||
1559 | /* was just updated in ieee80211_bss_info_update */ | |
1560 | beacon_timestamp = bss->timestamp; | |
1561 | ||
30b89b0f JB |
1562 | /* |
1563 | * In STA mode, the remaining parameters should not be overridden | |
1564 | * by beacons because they're not necessarily accurate there. | |
1565 | */ | |
05c914fe | 1566 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC && |
9859b81e | 1567 | bss->last_probe_resp && beacon) { |
3e122be0 | 1568 | ieee80211_rx_bss_put(local, bss); |
30b89b0f JB |
1569 | return; |
1570 | } | |
1571 | ||
9d9bf77d | 1572 | /* check if we need to merge IBSS */ |
05c914fe | 1573 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && beacon && |
fba4a1e6 | 1574 | bss->capability & WLAN_CAPABILITY_IBSS && |
9d9bf77d | 1575 | bss->freq == local->oper_channel->center_freq && |
ae6a44e3 EK |
1576 | elems->ssid_len == sdata->u.sta.ssid_len && |
1577 | memcmp(elems->ssid, sdata->u.sta.ssid, | |
1578 | sdata->u.sta.ssid_len) == 0) { | |
9d9bf77d BR |
1579 | if (rx_status->flag & RX_FLAG_TSFT) { |
1580 | /* in order for correct IBSS merging we need mactime | |
1581 | * | |
1582 | * since mactime is defined as the time the first data | |
1583 | * symbol of the frame hits the PHY, and the timestamp | |
1584 | * of the beacon is defined as "the time that the data | |
1585 | * symbol containing the first bit of the timestamp is | |
1586 | * transmitted to the PHY plus the transmitting STA’s | |
1587 | * delays through its local PHY from the MAC-PHY | |
1588 | * interface to its interface with the WM" | |
1589 | * (802.11 11.1.2) - equals the time this bit arrives at | |
1590 | * the receiver - we have to take into account the | |
1591 | * offset between the two. | |
1592 | * e.g: at 1 MBit that means mactime is 192 usec earlier | |
1593 | * (=24 bytes * 8 usecs/byte) than the beacon timestamp. | |
1594 | */ | |
8e1535d5 | 1595 | int rate = local->hw.wiphy->bands[band]-> |
9d9bf77d BR |
1596 | bitrates[rx_status->rate_idx].bitrate; |
1597 | rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate); | |
1598 | } else if (local && local->ops && local->ops->get_tsf) | |
1599 | /* second best option: get current TSF */ | |
1600 | rx_timestamp = local->ops->get_tsf(local_to_hw(local)); | |
1601 | else | |
1602 | /* can't merge without knowing the TSF */ | |
1603 | rx_timestamp = -1LLU; | |
1604 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0c68ae26 JB |
1605 | printk(KERN_DEBUG "RX beacon SA=%pM BSSID=" |
1606 | "%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n", | |
1607 | mgmt->sa, mgmt->bssid, | |
9d9bf77d BR |
1608 | (unsigned long long)rx_timestamp, |
1609 | (unsigned long long)beacon_timestamp, | |
1610 | (unsigned long long)(rx_timestamp - beacon_timestamp), | |
1611 | jiffies); | |
1612 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
1613 | if (beacon_timestamp > rx_timestamp) { | |
576fdeae | 1614 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
f4ea83dd | 1615 | printk(KERN_DEBUG "%s: beacon TSF higher than " |
0c68ae26 JB |
1616 | "local TSF - IBSS merge with BSSID %pM\n", |
1617 | sdata->dev->name, mgmt->bssid); | |
fba4a1e6 | 1618 | #endif |
f698d856 JBG |
1619 | ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss); |
1620 | ieee80211_ibss_add_sta(sdata, NULL, | |
87291c02 | 1621 | mgmt->bssid, mgmt->sa, |
8e1535d5 | 1622 | supp_rates); |
9d9bf77d BR |
1623 | } |
1624 | } | |
1625 | ||
3e122be0 | 1626 | ieee80211_rx_bss_put(local, bss); |
f0706e82 JB |
1627 | } |
1628 | ||
1629 | ||
f698d856 | 1630 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1631 | struct ieee80211_mgmt *mgmt, |
1632 | size_t len, | |
1633 | struct ieee80211_rx_status *rx_status) | |
1634 | { | |
ae6a44e3 EK |
1635 | size_t baselen; |
1636 | struct ieee802_11_elems elems; | |
9859b81e | 1637 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
ae6a44e3 | 1638 | |
8e7cdbb6 TW |
1639 | if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN)) |
1640 | return; /* ignore ProbeResp to foreign address */ | |
1641 | ||
ae6a44e3 EK |
1642 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
1643 | if (baselen > len) | |
1644 | return; | |
1645 | ||
1646 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
1647 | &elems); | |
1648 | ||
98c8fccf | 1649 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false); |
9859b81e RR |
1650 | |
1651 | /* direct probe may be part of the association flow */ | |
1652 | if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE, | |
1653 | &ifsta->request)) { | |
1654 | printk(KERN_DEBUG "%s direct probe responded\n", | |
1655 | sdata->dev->name); | |
1656 | ieee80211_authenticate(sdata, ifsta); | |
1657 | } | |
f0706e82 JB |
1658 | } |
1659 | ||
1660 | ||
f698d856 | 1661 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1662 | struct ieee80211_mgmt *mgmt, |
1663 | size_t len, | |
1664 | struct ieee80211_rx_status *rx_status) | |
1665 | { | |
f0706e82 | 1666 | struct ieee80211_if_sta *ifsta; |
f0706e82 JB |
1667 | size_t baselen; |
1668 | struct ieee802_11_elems elems; | |
f698d856 | 1669 | struct ieee80211_local *local = sdata->local; |
471b3efd | 1670 | u32 changed = 0; |
7a5158ef JB |
1671 | bool erp_valid; |
1672 | u8 erp_value = 0; | |
f0706e82 | 1673 | |
ae6a44e3 EK |
1674 | /* Process beacon from the current BSS */ |
1675 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
1676 | if (baselen > len) | |
1677 | return; | |
1678 | ||
1679 | ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems); | |
1680 | ||
98c8fccf | 1681 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true); |
f0706e82 | 1682 | |
05c914fe | 1683 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
f0706e82 JB |
1684 | return; |
1685 | ifsta = &sdata->u.sta; | |
1686 | ||
d6f2da5b | 1687 | if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) || |
f0706e82 JB |
1688 | memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) |
1689 | return; | |
1690 | ||
fe3fa827 JB |
1691 | ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param, |
1692 | elems.wmm_param_len); | |
1693 | ||
7a5158ef JB |
1694 | |
1695 | if (elems.erp_info && elems.erp_info_len >= 1) { | |
1696 | erp_valid = true; | |
1697 | erp_value = elems.erp_info[0]; | |
1698 | } else { | |
1699 | erp_valid = false; | |
50c4afb9 | 1700 | } |
7a5158ef JB |
1701 | changed |= ieee80211_handle_bss_capability(sdata, |
1702 | le16_to_cpu(mgmt->u.beacon.capab_info), | |
1703 | erp_valid, erp_value); | |
f0706e82 | 1704 | |
d3c990fb | 1705 | |
ae5eb026 JB |
1706 | if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param) { |
1707 | struct sta_info *sta; | |
1708 | struct ieee80211_supported_band *sband; | |
1709 | u16 ap_ht_cap_flags; | |
1710 | ||
1711 | rcu_read_lock(); | |
1712 | ||
1713 | sta = sta_info_get(local, ifsta->bssid); | |
1714 | if (!sta) { | |
1715 | rcu_read_unlock(); | |
1716 | return; | |
1717 | } | |
1718 | ||
1719 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1720 | ||
1721 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, | |
1722 | elems.ht_cap_elem, &sta->sta.ht_cap); | |
1723 | ||
1724 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
1725 | ||
1726 | rcu_read_unlock(); | |
1727 | ||
1728 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, | |
1729 | ap_ht_cap_flags); | |
d3c990fb RR |
1730 | } |
1731 | ||
471b3efd | 1732 | ieee80211_bss_info_change_notify(sdata, changed); |
f0706e82 JB |
1733 | } |
1734 | ||
1735 | ||
f698d856 | 1736 | static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1737 | struct ieee80211_if_sta *ifsta, |
1738 | struct ieee80211_mgmt *mgmt, | |
1739 | size_t len, | |
1740 | struct ieee80211_rx_status *rx_status) | |
1741 | { | |
f698d856 | 1742 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1743 | int tx_last_beacon; |
1744 | struct sk_buff *skb; | |
1745 | struct ieee80211_mgmt *resp; | |
1746 | u8 *pos, *end; | |
1747 | ||
05c914fe | 1748 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC || |
48c2fc59 | 1749 | ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED || |
f0706e82 JB |
1750 | len < 24 + 2 || !ifsta->probe_resp) |
1751 | return; | |
1752 | ||
1753 | if (local->ops->tx_last_beacon) | |
1754 | tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local)); | |
1755 | else | |
1756 | tx_last_beacon = 1; | |
1757 | ||
1758 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0c68ae26 JB |
1759 | printk(KERN_DEBUG "%s: RX ProbeReq SA=%pM DA=%pM BSSID=%pM" |
1760 | " (tx_last_beacon=%d)\n", | |
1761 | sdata->dev->name, mgmt->sa, mgmt->da, | |
1762 | mgmt->bssid, tx_last_beacon); | |
f0706e82 JB |
1763 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
1764 | ||
1765 | if (!tx_last_beacon) | |
1766 | return; | |
1767 | ||
1768 | if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 && | |
1769 | memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0) | |
1770 | return; | |
1771 | ||
1772 | end = ((u8 *) mgmt) + len; | |
1773 | pos = mgmt->u.probe_req.variable; | |
1774 | if (pos[0] != WLAN_EID_SSID || | |
1775 | pos + 2 + pos[1] > end) { | |
f4ea83dd JB |
1776 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
1777 | printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq " | |
0c68ae26 JB |
1778 | "from %pM\n", |
1779 | sdata->dev->name, mgmt->sa); | |
f4ea83dd | 1780 | #endif |
f0706e82 JB |
1781 | return; |
1782 | } | |
1783 | if (pos[1] != 0 && | |
1784 | (pos[1] != ifsta->ssid_len || | |
1785 | memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) { | |
1786 | /* Ignore ProbeReq for foreign SSID */ | |
1787 | return; | |
1788 | } | |
1789 | ||
1790 | /* Reply with ProbeResp */ | |
0ec0b7ac | 1791 | skb = skb_copy(ifsta->probe_resp, GFP_KERNEL); |
f0706e82 JB |
1792 | if (!skb) |
1793 | return; | |
1794 | ||
1795 | resp = (struct ieee80211_mgmt *) skb->data; | |
1796 | memcpy(resp->da, mgmt->sa, ETH_ALEN); | |
1797 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0c68ae26 JB |
1798 | printk(KERN_DEBUG "%s: Sending ProbeResp to %pM\n", |
1799 | sdata->dev->name, resp->da); | |
f0706e82 | 1800 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
e50db65c | 1801 | ieee80211_tx_skb(sdata, skb, 0); |
f0706e82 JB |
1802 | } |
1803 | ||
f698d856 | 1804 | void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, |
f0706e82 JB |
1805 | struct ieee80211_rx_status *rx_status) |
1806 | { | |
f698d856 | 1807 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1808 | struct ieee80211_if_sta *ifsta; |
1809 | struct ieee80211_mgmt *mgmt; | |
1810 | u16 fc; | |
1811 | ||
1812 | if (skb->len < 24) | |
1813 | goto fail; | |
1814 | ||
f0706e82 JB |
1815 | ifsta = &sdata->u.sta; |
1816 | ||
1817 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1818 | fc = le16_to_cpu(mgmt->frame_control); | |
1819 | ||
1820 | switch (fc & IEEE80211_FCTL_STYPE) { | |
1821 | case IEEE80211_STYPE_PROBE_REQ: | |
1822 | case IEEE80211_STYPE_PROBE_RESP: | |
1823 | case IEEE80211_STYPE_BEACON: | |
1824 | memcpy(skb->cb, rx_status, sizeof(*rx_status)); | |
1825 | case IEEE80211_STYPE_AUTH: | |
1826 | case IEEE80211_STYPE_ASSOC_RESP: | |
1827 | case IEEE80211_STYPE_REASSOC_RESP: | |
1828 | case IEEE80211_STYPE_DEAUTH: | |
1829 | case IEEE80211_STYPE_DISASSOC: | |
1830 | skb_queue_tail(&ifsta->skb_queue, skb); | |
1831 | queue_work(local->hw.workqueue, &ifsta->work); | |
1832 | return; | |
f0706e82 JB |
1833 | } |
1834 | ||
1835 | fail: | |
1836 | kfree_skb(skb); | |
1837 | } | |
1838 | ||
f698d856 | 1839 | static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1840 | struct sk_buff *skb) |
1841 | { | |
1842 | struct ieee80211_rx_status *rx_status; | |
f0706e82 JB |
1843 | struct ieee80211_if_sta *ifsta; |
1844 | struct ieee80211_mgmt *mgmt; | |
1845 | u16 fc; | |
1846 | ||
f0706e82 JB |
1847 | ifsta = &sdata->u.sta; |
1848 | ||
1849 | rx_status = (struct ieee80211_rx_status *) skb->cb; | |
1850 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1851 | fc = le16_to_cpu(mgmt->frame_control); | |
1852 | ||
1853 | switch (fc & IEEE80211_FCTL_STYPE) { | |
1854 | case IEEE80211_STYPE_PROBE_REQ: | |
f698d856 | 1855 | ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len, |
f0706e82 JB |
1856 | rx_status); |
1857 | break; | |
1858 | case IEEE80211_STYPE_PROBE_RESP: | |
f698d856 | 1859 | ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status); |
f0706e82 JB |
1860 | break; |
1861 | case IEEE80211_STYPE_BEACON: | |
f698d856 | 1862 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); |
f0706e82 JB |
1863 | break; |
1864 | case IEEE80211_STYPE_AUTH: | |
f698d856 | 1865 | ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len); |
f0706e82 JB |
1866 | break; |
1867 | case IEEE80211_STYPE_ASSOC_RESP: | |
471b3efd | 1868 | ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0); |
f0706e82 JB |
1869 | break; |
1870 | case IEEE80211_STYPE_REASSOC_RESP: | |
471b3efd | 1871 | ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1); |
f0706e82 JB |
1872 | break; |
1873 | case IEEE80211_STYPE_DEAUTH: | |
f698d856 | 1874 | ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len); |
f0706e82 JB |
1875 | break; |
1876 | case IEEE80211_STYPE_DISASSOC: | |
f698d856 | 1877 | ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len); |
f0706e82 JB |
1878 | break; |
1879 | } | |
1880 | ||
1881 | kfree_skb(skb); | |
1882 | } | |
1883 | ||
1884 | ||
f698d856 | 1885 | static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1886 | { |
f698d856 | 1887 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1888 | int active = 0; |
1889 | struct sta_info *sta; | |
1890 | ||
d0709a65 JB |
1891 | rcu_read_lock(); |
1892 | ||
1893 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
1894 | if (sta->sdata == sdata && | |
f0706e82 JB |
1895 | time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL, |
1896 | jiffies)) { | |
1897 | active++; | |
1898 | break; | |
1899 | } | |
1900 | } | |
d0709a65 JB |
1901 | |
1902 | rcu_read_unlock(); | |
f0706e82 JB |
1903 | |
1904 | return active; | |
1905 | } | |
1906 | ||
1907 | ||
f698d856 | 1908 | static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1909 | struct ieee80211_if_sta *ifsta) |
1910 | { | |
1911 | mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); | |
1912 | ||
f698d856 JBG |
1913 | ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT); |
1914 | if (ieee80211_sta_active_ibss(sdata)) | |
f0706e82 JB |
1915 | return; |
1916 | ||
1917 | printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other " | |
f698d856 | 1918 | "IBSS networks with same SSID (merge)\n", sdata->dev->name); |
c2b13452 | 1919 | ieee80211_request_scan(sdata, ifsta->ssid, ifsta->ssid_len); |
f0706e82 JB |
1920 | } |
1921 | ||
1922 | ||
9c6bd790 | 1923 | static void ieee80211_sta_timer(unsigned long data) |
f0706e82 | 1924 | { |
60f8b39c JB |
1925 | struct ieee80211_sub_if_data *sdata = |
1926 | (struct ieee80211_sub_if_data *) data; | |
1927 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
1928 | struct ieee80211_local *local = sdata->local; | |
f0706e82 | 1929 | |
60f8b39c JB |
1930 | set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); |
1931 | queue_work(local->hw.workqueue, &ifsta->work); | |
f0706e82 JB |
1932 | } |
1933 | ||
f698d856 | 1934 | static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1935 | struct ieee80211_if_sta *ifsta) |
1936 | { | |
f698d856 | 1937 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1938 | |
1939 | if (local->ops->reset_tsf) { | |
1940 | /* Reset own TSF to allow time synchronization work. */ | |
1941 | local->ops->reset_tsf(local_to_hw(local)); | |
1942 | } | |
1943 | ||
1944 | ifsta->wmm_last_param_set = -1; /* allow any WMM update */ | |
1945 | ||
1946 | ||
1947 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
1948 | ifsta->auth_alg = WLAN_AUTH_OPEN; | |
1949 | else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
1950 | ifsta->auth_alg = WLAN_AUTH_SHARED_KEY; | |
1951 | else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
1952 | ifsta->auth_alg = WLAN_AUTH_LEAP; | |
1953 | else | |
1954 | ifsta->auth_alg = WLAN_AUTH_OPEN; | |
f0706e82 | 1955 | ifsta->auth_transaction = -1; |
d6f2da5b | 1956 | ifsta->flags &= ~IEEE80211_STA_ASSOCIATED; |
6042a3e3 | 1957 | ifsta->assoc_scan_tries = 0; |
9859b81e | 1958 | ifsta->direct_probe_tries = 0; |
6042a3e3 RR |
1959 | ifsta->auth_tries = 0; |
1960 | ifsta->assoc_tries = 0; | |
24e64622 | 1961 | netif_tx_stop_all_queues(sdata->dev); |
f698d856 | 1962 | netif_carrier_off(sdata->dev); |
f0706e82 JB |
1963 | } |
1964 | ||
1965 | ||
f0706e82 JB |
1966 | static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta, |
1967 | const char *ssid, int ssid_len) | |
1968 | { | |
1969 | int tmp, hidden_ssid; | |
1970 | ||
48225709 MW |
1971 | if (ssid_len == ifsta->ssid_len && |
1972 | !memcmp(ifsta->ssid, ssid, ssid_len)) | |
f0706e82 JB |
1973 | return 1; |
1974 | ||
d6f2da5b | 1975 | if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) |
f0706e82 JB |
1976 | return 0; |
1977 | ||
1978 | hidden_ssid = 1; | |
1979 | tmp = ssid_len; | |
1980 | while (tmp--) { | |
1981 | if (ssid[tmp] != '\0') { | |
1982 | hidden_ssid = 0; | |
1983 | break; | |
1984 | } | |
1985 | } | |
1986 | ||
1987 | if (hidden_ssid && ifsta->ssid_len == ssid_len) | |
1988 | return 1; | |
1989 | ||
1990 | if (ssid_len == 1 && ssid[0] == ' ') | |
1991 | return 1; | |
1992 | ||
1993 | return 0; | |
1994 | } | |
1995 | ||
f698d856 | 1996 | static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1997 | struct ieee80211_if_sta *ifsta) |
1998 | { | |
f698d856 | 1999 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 2000 | struct ieee80211_bss *bss; |
8318d78a | 2001 | struct ieee80211_supported_band *sband; |
f0706e82 JB |
2002 | u8 bssid[ETH_ALEN], *pos; |
2003 | int i; | |
167ad6f7 | 2004 | int ret; |
f0706e82 JB |
2005 | |
2006 | #if 0 | |
2007 | /* Easier testing, use fixed BSSID. */ | |
2008 | memset(bssid, 0xfe, ETH_ALEN); | |
2009 | #else | |
2010 | /* Generate random, not broadcast, locally administered BSSID. Mix in | |
2011 | * own MAC address to make sure that devices that do not have proper | |
2012 | * random number generator get different BSSID. */ | |
2013 | get_random_bytes(bssid, ETH_ALEN); | |
2014 | for (i = 0; i < ETH_ALEN; i++) | |
f698d856 | 2015 | bssid[i] ^= sdata->dev->dev_addr[i]; |
f0706e82 JB |
2016 | bssid[0] &= ~0x01; |
2017 | bssid[0] |= 0x02; | |
2018 | #endif | |
2019 | ||
0c68ae26 JB |
2020 | printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %pM\n", |
2021 | sdata->dev->name, bssid); | |
f0706e82 | 2022 | |
98c8fccf | 2023 | bss = ieee80211_rx_bss_add(local, bssid, |
8318d78a | 2024 | local->hw.conf.channel->center_freq, |
cffdd30d | 2025 | sdata->u.sta.ssid, sdata->u.sta.ssid_len); |
f0706e82 JB |
2026 | if (!bss) |
2027 | return -ENOMEM; | |
2028 | ||
8318d78a JB |
2029 | bss->band = local->hw.conf.channel->band; |
2030 | sband = local->hw.wiphy->bands[bss->band]; | |
f0706e82 JB |
2031 | |
2032 | if (local->hw.conf.beacon_int == 0) | |
dc0ae30c | 2033 | local->hw.conf.beacon_int = 100; |
f0706e82 | 2034 | bss->beacon_int = local->hw.conf.beacon_int; |
f0706e82 JB |
2035 | bss->last_update = jiffies; |
2036 | bss->capability = WLAN_CAPABILITY_IBSS; | |
988c0f72 JB |
2037 | |
2038 | if (sdata->default_key) | |
f0706e82 | 2039 | bss->capability |= WLAN_CAPABILITY_PRIVACY; |
988c0f72 | 2040 | else |
f0706e82 | 2041 | sdata->drop_unencrypted = 0; |
988c0f72 | 2042 | |
8318d78a | 2043 | bss->supp_rates_len = sband->n_bitrates; |
f0706e82 | 2044 | pos = bss->supp_rates; |
8318d78a JB |
2045 | for (i = 0; i < sband->n_bitrates; i++) { |
2046 | int rate = sband->bitrates[i].bitrate; | |
f0706e82 JB |
2047 | *pos++ = (u8) (rate / 5); |
2048 | } | |
2049 | ||
f698d856 | 2050 | ret = ieee80211_sta_join_ibss(sdata, ifsta, bss); |
3e122be0 | 2051 | ieee80211_rx_bss_put(local, bss); |
167ad6f7 | 2052 | return ret; |
f0706e82 JB |
2053 | } |
2054 | ||
2055 | ||
f698d856 | 2056 | static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2057 | struct ieee80211_if_sta *ifsta) |
2058 | { | |
f698d856 | 2059 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 2060 | struct ieee80211_bss *bss; |
f0706e82 JB |
2061 | int found = 0; |
2062 | u8 bssid[ETH_ALEN]; | |
2063 | int active_ibss; | |
2064 | ||
2065 | if (ifsta->ssid_len == 0) | |
2066 | return -EINVAL; | |
2067 | ||
f698d856 | 2068 | active_ibss = ieee80211_sta_active_ibss(sdata); |
f0706e82 JB |
2069 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
2070 | printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n", | |
f698d856 | 2071 | sdata->dev->name, active_ibss); |
f0706e82 | 2072 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
c2b13452 JB |
2073 | spin_lock_bh(&local->bss_lock); |
2074 | list_for_each_entry(bss, &local->bss_list, list) { | |
f0706e82 JB |
2075 | if (ifsta->ssid_len != bss->ssid_len || |
2076 | memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0 | |
2077 | || !(bss->capability & WLAN_CAPABILITY_IBSS)) | |
2078 | continue; | |
2079 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0c68ae26 | 2080 | printk(KERN_DEBUG " bssid=%pM found\n", bss->bssid); |
f0706e82 JB |
2081 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
2082 | memcpy(bssid, bss->bssid, ETH_ALEN); | |
2083 | found = 1; | |
2084 | if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0) | |
2085 | break; | |
2086 | } | |
c2b13452 | 2087 | spin_unlock_bh(&local->bss_lock); |
f0706e82 JB |
2088 | |
2089 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
6e43829b | 2090 | if (found) |
0c68ae26 JB |
2091 | printk(KERN_DEBUG " sta_find_ibss: selected %pM current " |
2092 | "%pM\n", bssid, ifsta->bssid); | |
f0706e82 | 2093 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
80693ceb DD |
2094 | |
2095 | if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) { | |
167ad6f7 | 2096 | int ret; |
80693ceb DD |
2097 | int search_freq; |
2098 | ||
2099 | if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) | |
2100 | search_freq = bss->freq; | |
2101 | else | |
2102 | search_freq = local->hw.conf.channel->center_freq; | |
2103 | ||
f698d856 | 2104 | bss = ieee80211_rx_bss_get(local, bssid, search_freq, |
80693ceb DD |
2105 | ifsta->ssid, ifsta->ssid_len); |
2106 | if (!bss) | |
2107 | goto dont_join; | |
2108 | ||
0c68ae26 | 2109 | printk(KERN_DEBUG "%s: Selected IBSS BSSID %pM" |
f0706e82 | 2110 | " based on configured SSID\n", |
0c68ae26 | 2111 | sdata->dev->name, bssid); |
f698d856 | 2112 | ret = ieee80211_sta_join_ibss(sdata, ifsta, bss); |
3e122be0 | 2113 | ieee80211_rx_bss_put(local, bss); |
167ad6f7 | 2114 | return ret; |
f0706e82 | 2115 | } |
80693ceb DD |
2116 | |
2117 | dont_join: | |
f0706e82 JB |
2118 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
2119 | printk(KERN_DEBUG " did not try to join ibss\n"); | |
2120 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
2121 | ||
2122 | /* Selected IBSS not found in current scan results - try to scan */ | |
48c2fc59 | 2123 | if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED && |
f698d856 | 2124 | !ieee80211_sta_active_ibss(sdata)) { |
f0706e82 JB |
2125 | mod_timer(&ifsta->timer, jiffies + |
2126 | IEEE80211_IBSS_MERGE_INTERVAL); | |
2127 | } else if (time_after(jiffies, local->last_scan_completed + | |
2128 | IEEE80211_SCAN_INTERVAL)) { | |
2129 | printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to " | |
f698d856 | 2130 | "join\n", sdata->dev->name); |
c2b13452 | 2131 | return ieee80211_request_scan(sdata, ifsta->ssid, |
f0706e82 | 2132 | ifsta->ssid_len); |
48c2fc59 | 2133 | } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) { |
f0706e82 JB |
2134 | int interval = IEEE80211_SCAN_INTERVAL; |
2135 | ||
2136 | if (time_after(jiffies, ifsta->ibss_join_req + | |
2137 | IEEE80211_IBSS_JOIN_TIMEOUT)) { | |
d6f2da5b | 2138 | if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) && |
8318d78a JB |
2139 | (!(local->oper_channel->flags & |
2140 | IEEE80211_CHAN_NO_IBSS))) | |
f698d856 | 2141 | return ieee80211_sta_create_ibss(sdata, ifsta); |
d6f2da5b | 2142 | if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) { |
8318d78a | 2143 | printk(KERN_DEBUG "%s: IBSS not allowed on" |
f698d856 | 2144 | " %d MHz\n", sdata->dev->name, |
8318d78a | 2145 | local->hw.conf.channel->center_freq); |
f0706e82 JB |
2146 | } |
2147 | ||
2148 | /* No IBSS found - decrease scan interval and continue | |
2149 | * scanning. */ | |
2150 | interval = IEEE80211_SCAN_INTERVAL_SLOW; | |
2151 | } | |
2152 | ||
48c2fc59 | 2153 | ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH; |
f0706e82 JB |
2154 | mod_timer(&ifsta->timer, jiffies + interval); |
2155 | return 0; | |
2156 | } | |
2157 | ||
2158 | return 0; | |
2159 | } | |
2160 | ||
2161 | ||
9c6bd790 JB |
2162 | static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata, |
2163 | struct ieee80211_if_sta *ifsta) | |
f0706e82 | 2164 | { |
9c6bd790 | 2165 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 2166 | struct ieee80211_bss *bss, *selected = NULL; |
9c6bd790 | 2167 | int top_rssi = 0, freq; |
f0706e82 | 2168 | |
c2b13452 | 2169 | spin_lock_bh(&local->bss_lock); |
9c6bd790 | 2170 | freq = local->oper_channel->center_freq; |
c2b13452 | 2171 | list_for_each_entry(bss, &local->bss_list, list) { |
9c6bd790 JB |
2172 | if (!(bss->capability & WLAN_CAPABILITY_ESS)) |
2173 | continue; | |
f0706e82 | 2174 | |
9c6bd790 JB |
2175 | if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL | |
2176 | IEEE80211_STA_AUTO_BSSID_SEL | | |
2177 | IEEE80211_STA_AUTO_CHANNEL_SEL)) && | |
2178 | (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^ | |
2179 | !!sdata->default_key)) | |
2180 | continue; | |
f0706e82 | 2181 | |
9c6bd790 JB |
2182 | if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) && |
2183 | bss->freq != freq) | |
2184 | continue; | |
9d139c81 | 2185 | |
9c6bd790 JB |
2186 | if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) && |
2187 | memcmp(bss->bssid, ifsta->bssid, ETH_ALEN)) | |
2188 | continue; | |
f0706e82 | 2189 | |
9c6bd790 JB |
2190 | if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) && |
2191 | !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len)) | |
2192 | continue; | |
9d139c81 | 2193 | |
9c6bd790 JB |
2194 | if (!selected || top_rssi < bss->signal) { |
2195 | selected = bss; | |
2196 | top_rssi = bss->signal; | |
2197 | } | |
f0706e82 | 2198 | } |
9c6bd790 JB |
2199 | if (selected) |
2200 | atomic_inc(&selected->users); | |
c2b13452 | 2201 | spin_unlock_bh(&local->bss_lock); |
9d139c81 | 2202 | |
9c6bd790 JB |
2203 | if (selected) { |
2204 | ieee80211_set_freq(sdata, selected->freq); | |
2205 | if (!(ifsta->flags & IEEE80211_STA_SSID_SET)) | |
2206 | ieee80211_sta_set_ssid(sdata, selected->ssid, | |
2207 | selected->ssid_len); | |
2208 | ieee80211_sta_set_bssid(sdata, selected->bssid); | |
2209 | ieee80211_sta_def_wmm_params(sdata, selected); | |
f0706e82 | 2210 | |
9c6bd790 JB |
2211 | /* Send out direct probe if no probe resp was received or |
2212 | * the one we have is outdated | |
2213 | */ | |
2214 | if (!selected->last_probe_resp || | |
2215 | time_after(jiffies, selected->last_probe_resp | |
2216 | + IEEE80211_SCAN_RESULT_EXPIRE)) | |
2217 | ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE; | |
2218 | else | |
2219 | ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE; | |
f0706e82 | 2220 | |
9c6bd790 JB |
2221 | ieee80211_rx_bss_put(local, selected); |
2222 | ieee80211_sta_reset_auth(sdata, ifsta); | |
2223 | return 0; | |
2224 | } else { | |
2225 | if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) { | |
2226 | ifsta->assoc_scan_tries++; | |
2227 | if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) | |
c2b13452 | 2228 | ieee80211_start_scan(sdata, NULL, 0); |
9c6bd790 | 2229 | else |
c2b13452 | 2230 | ieee80211_start_scan(sdata, ifsta->ssid, |
9c6bd790 JB |
2231 | ifsta->ssid_len); |
2232 | ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE; | |
2233 | set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); | |
2234 | } else | |
2235 | ifsta->state = IEEE80211_STA_MLME_DISABLED; | |
2236 | } | |
2237 | return -1; | |
2238 | } | |
2239 | ||
2240 | ||
2241 | static void ieee80211_sta_work(struct work_struct *work) | |
2242 | { | |
2243 | struct ieee80211_sub_if_data *sdata = | |
2244 | container_of(work, struct ieee80211_sub_if_data, u.sta.work); | |
2245 | struct ieee80211_local *local = sdata->local; | |
2246 | struct ieee80211_if_sta *ifsta; | |
2247 | struct sk_buff *skb; | |
2248 | ||
2249 | if (!netif_running(sdata->dev)) | |
2250 | return; | |
2251 | ||
c2b13452 | 2252 | if (local->sw_scanning || local->hw_scanning) |
9c6bd790 JB |
2253 | return; |
2254 | ||
05c914fe JB |
2255 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION && |
2256 | sdata->vif.type != NL80211_IFTYPE_ADHOC)) | |
9c6bd790 | 2257 | return; |
f0706e82 JB |
2258 | ifsta = &sdata->u.sta; |
2259 | ||
9c6bd790 JB |
2260 | while ((skb = skb_dequeue(&ifsta->skb_queue))) |
2261 | ieee80211_sta_rx_queued_mgmt(sdata, skb); | |
2262 | ||
2263 | if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE && | |
2264 | ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE && | |
2265 | ifsta->state != IEEE80211_STA_MLME_ASSOCIATE && | |
2266 | test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) { | |
c2b13452 JB |
2267 | ieee80211_start_scan(sdata, ifsta->scan_ssid, |
2268 | ifsta->scan_ssid_len); | |
9c6bd790 | 2269 | return; |
f0706e82 JB |
2270 | } |
2271 | ||
9c6bd790 JB |
2272 | if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) { |
2273 | if (ieee80211_sta_config_auth(sdata, ifsta)) | |
2274 | return; | |
2275 | clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); | |
2276 | } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request)) | |
2277 | return; | |
d6f2da5b | 2278 | |
9c6bd790 JB |
2279 | switch (ifsta->state) { |
2280 | case IEEE80211_STA_MLME_DISABLED: | |
2281 | break; | |
2282 | case IEEE80211_STA_MLME_DIRECT_PROBE: | |
2283 | ieee80211_direct_probe(sdata, ifsta); | |
2284 | break; | |
2285 | case IEEE80211_STA_MLME_AUTHENTICATE: | |
2286 | ieee80211_authenticate(sdata, ifsta); | |
2287 | break; | |
2288 | case IEEE80211_STA_MLME_ASSOCIATE: | |
2289 | ieee80211_associate(sdata, ifsta); | |
2290 | break; | |
2291 | case IEEE80211_STA_MLME_ASSOCIATED: | |
2292 | ieee80211_associated(sdata, ifsta); | |
2293 | break; | |
2294 | case IEEE80211_STA_MLME_IBSS_SEARCH: | |
2295 | ieee80211_sta_find_ibss(sdata, ifsta); | |
2296 | break; | |
2297 | case IEEE80211_STA_MLME_IBSS_JOINED: | |
2298 | ieee80211_sta_merge_ibss(sdata, ifsta); | |
2299 | break; | |
2300 | default: | |
2301 | WARN_ON(1); | |
2302 | break; | |
2303 | } | |
2304 | ||
2305 | if (ieee80211_privacy_mismatch(sdata, ifsta)) { | |
2306 | printk(KERN_DEBUG "%s: privacy configuration mismatch and " | |
2307 | "mixed-cell disabled - disassociate\n", sdata->dev->name); | |
2308 | ||
2309 | ieee80211_set_disassoc(sdata, ifsta, false, true, | |
2310 | WLAN_REASON_UNSPECIFIED); | |
2311 | } | |
f0706e82 JB |
2312 | } |
2313 | ||
9c6bd790 JB |
2314 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
2315 | { | |
05c914fe | 2316 | if (sdata->vif.type == NL80211_IFTYPE_STATION) |
9c6bd790 JB |
2317 | queue_work(sdata->local->hw.workqueue, |
2318 | &sdata->u.sta.work); | |
2319 | } | |
f0706e82 | 2320 | |
9c6bd790 JB |
2321 | /* interface setup */ |
2322 | void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) | |
f0706e82 | 2323 | { |
9c6bd790 | 2324 | struct ieee80211_if_sta *ifsta; |
988c0f72 | 2325 | |
9c6bd790 JB |
2326 | ifsta = &sdata->u.sta; |
2327 | INIT_WORK(&ifsta->work, ieee80211_sta_work); | |
2328 | setup_timer(&ifsta->timer, ieee80211_sta_timer, | |
2329 | (unsigned long) sdata); | |
2330 | skb_queue_head_init(&ifsta->skb_queue); | |
2331 | ||
2332 | ifsta->capab = WLAN_CAPABILITY_ESS; | |
2333 | ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN | | |
2334 | IEEE80211_AUTH_ALG_SHARED_KEY; | |
2335 | ifsta->flags |= IEEE80211_STA_CREATE_IBSS | | |
2336 | IEEE80211_STA_AUTO_BSSID_SEL | | |
2337 | IEEE80211_STA_AUTO_CHANNEL_SEL; | |
2338 | if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4) | |
2339 | ifsta->flags |= IEEE80211_STA_WMM_ENABLED; | |
f0706e82 JB |
2340 | } |
2341 | ||
9c6bd790 JB |
2342 | /* |
2343 | * Add a new IBSS station, will also be called by the RX code when, | |
2344 | * in IBSS mode, receiving a frame from a yet-unknown station, hence | |
2345 | * must be callable in atomic context. | |
2346 | */ | |
f698d856 | 2347 | struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, |
988c0f72 | 2348 | struct sk_buff *skb, u8 *bssid, |
87291c02 | 2349 | u8 *addr, u64 supp_rates) |
f0706e82 | 2350 | { |
f698d856 | 2351 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 2352 | struct sta_info *sta; |
87291c02 | 2353 | int band = local->hw.conf.channel->band; |
f0706e82 JB |
2354 | |
2355 | /* TODO: Could consider removing the least recently used entry and | |
2356 | * allow new one to be added. */ | |
2357 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { | |
2358 | if (net_ratelimit()) { | |
2359 | printk(KERN_DEBUG "%s: No room for a new IBSS STA " | |
0c68ae26 | 2360 | "entry %pM\n", sdata->dev->name, addr); |
f0706e82 JB |
2361 | } |
2362 | return NULL; | |
2363 | } | |
2364 | ||
1e188637 | 2365 | if (compare_ether_addr(bssid, sdata->u.sta.bssid)) |
87291c02 VK |
2366 | return NULL; |
2367 | ||
f4ea83dd | 2368 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
0c68ae26 JB |
2369 | printk(KERN_DEBUG "%s: Adding new IBSS station %pM (dev=%s)\n", |
2370 | wiphy_name(local->hw.wiphy), addr, sdata->dev->name); | |
f4ea83dd | 2371 | #endif |
f0706e82 | 2372 | |
73651ee6 JB |
2373 | sta = sta_info_alloc(sdata, addr, GFP_ATOMIC); |
2374 | if (!sta) | |
f0706e82 JB |
2375 | return NULL; |
2376 | ||
07346f81 | 2377 | set_sta_flags(sta, WLAN_STA_AUTHORIZED); |
238814fd | 2378 | |
8e1535d5 | 2379 | /* make sure mandatory rates are always added */ |
323ce79a | 2380 | sta->sta.supp_rates[band] = supp_rates | |
96dd22ac | 2381 | ieee80211_mandatory_rates(local, band); |
f0706e82 | 2382 | |
4b7679a5 | 2383 | rate_control_rate_init(sta); |
f0706e82 | 2384 | |
93e5deb1 | 2385 | if (sta_info_insert(sta)) |
73651ee6 | 2386 | return NULL; |
73651ee6 | 2387 | |
d0709a65 | 2388 | return sta; |
f0706e82 JB |
2389 | } |
2390 | ||
9c6bd790 JB |
2391 | /* configuration hooks */ |
2392 | void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata, | |
2393 | struct ieee80211_if_sta *ifsta) | |
60f8b39c JB |
2394 | { |
2395 | struct ieee80211_local *local = sdata->local; | |
60f8b39c | 2396 | |
05c914fe | 2397 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
9c6bd790 | 2398 | return; |
60f8b39c | 2399 | |
9c6bd790 JB |
2400 | if ((ifsta->flags & (IEEE80211_STA_BSSID_SET | |
2401 | IEEE80211_STA_AUTO_BSSID_SEL)) && | |
2402 | (ifsta->flags & (IEEE80211_STA_SSID_SET | | |
2403 | IEEE80211_STA_AUTO_SSID_SEL))) { | |
60f8b39c | 2404 | |
9c6bd790 JB |
2405 | if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) |
2406 | ieee80211_set_disassoc(sdata, ifsta, true, true, | |
2407 | WLAN_REASON_DEAUTH_LEAVING); | |
60f8b39c | 2408 | |
9c6bd790 JB |
2409 | set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); |
2410 | queue_work(local->hw.workqueue, &ifsta->work); | |
2411 | } | |
2412 | } | |
60f8b39c | 2413 | |
9c6bd790 JB |
2414 | int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len) |
2415 | { | |
2416 | struct ieee80211_if_sta *ifsta; | |
2417 | int res; | |
60f8b39c | 2418 | |
9c6bd790 JB |
2419 | if (len > IEEE80211_MAX_SSID_LEN) |
2420 | return -EINVAL; | |
2421 | ||
2422 | ifsta = &sdata->u.sta; | |
2423 | ||
2424 | if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) { | |
2425 | memset(ifsta->ssid, 0, sizeof(ifsta->ssid)); | |
2426 | memcpy(ifsta->ssid, ssid, len); | |
2427 | ifsta->ssid_len = len; | |
2428 | ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET; | |
2429 | ||
2430 | res = 0; | |
2431 | /* | |
2432 | * Hack! MLME code needs to be cleaned up to have different | |
2433 | * entry points for configuration and internal selection change | |
2434 | */ | |
2435 | if (netif_running(sdata->dev)) | |
2436 | res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID); | |
2437 | if (res) { | |
2438 | printk(KERN_DEBUG "%s: Failed to config new SSID to " | |
2439 | "the low-level driver\n", sdata->dev->name); | |
2440 | return res; | |
60f8b39c JB |
2441 | } |
2442 | } | |
60f8b39c | 2443 | |
9c6bd790 JB |
2444 | if (len) |
2445 | ifsta->flags |= IEEE80211_STA_SSID_SET; | |
2446 | else | |
2447 | ifsta->flags &= ~IEEE80211_STA_SSID_SET; | |
60f8b39c | 2448 | |
05c914fe | 2449 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && |
9c6bd790 JB |
2450 | !(ifsta->flags & IEEE80211_STA_BSSID_SET)) { |
2451 | ifsta->ibss_join_req = jiffies; | |
2452 | ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH; | |
2453 | return ieee80211_sta_find_ibss(sdata, ifsta); | |
2454 | } | |
2455 | ||
2456 | return 0; | |
2457 | } | |
2458 | ||
2459 | int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len) | |
2460 | { | |
2461 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
2462 | memcpy(ssid, ifsta->ssid, ifsta->ssid_len); | |
2463 | *len = ifsta->ssid_len; | |
2464 | return 0; | |
2465 | } | |
2466 | ||
2467 | int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid) | |
2468 | { | |
2469 | struct ieee80211_if_sta *ifsta; | |
2470 | int res; | |
2471 | ||
2472 | ifsta = &sdata->u.sta; | |
2473 | ||
2474 | if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) { | |
2475 | memcpy(ifsta->bssid, bssid, ETH_ALEN); | |
2476 | res = 0; | |
2477 | /* | |
2478 | * Hack! See also ieee80211_sta_set_ssid. | |
60f8b39c | 2479 | */ |
9c6bd790 JB |
2480 | if (netif_running(sdata->dev)) |
2481 | res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID); | |
2482 | if (res) { | |
2483 | printk(KERN_DEBUG "%s: Failed to config new BSSID to " | |
2484 | "the low-level driver\n", sdata->dev->name); | |
2485 | return res; | |
2486 | } | |
2487 | } | |
60f8b39c | 2488 | |
9c6bd790 JB |
2489 | if (is_valid_ether_addr(bssid)) |
2490 | ifsta->flags |= IEEE80211_STA_BSSID_SET; | |
2491 | else | |
2492 | ifsta->flags &= ~IEEE80211_STA_BSSID_SET; | |
2493 | ||
2494 | return 0; | |
2495 | } | |
2496 | ||
2497 | int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len) | |
2498 | { | |
2499 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
2500 | ||
2501 | kfree(ifsta->extra_ie); | |
2502 | if (len == 0) { | |
2503 | ifsta->extra_ie = NULL; | |
2504 | ifsta->extra_ie_len = 0; | |
60f8b39c | 2505 | return 0; |
60f8b39c | 2506 | } |
9c6bd790 JB |
2507 | ifsta->extra_ie = kmalloc(len, GFP_KERNEL); |
2508 | if (!ifsta->extra_ie) { | |
2509 | ifsta->extra_ie_len = 0; | |
2510 | return -ENOMEM; | |
2511 | } | |
2512 | memcpy(ifsta->extra_ie, ie, len); | |
2513 | ifsta->extra_ie_len = len; | |
2514 | return 0; | |
60f8b39c JB |
2515 | } |
2516 | ||
f698d856 | 2517 | int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 2518 | { |
f0706e82 JB |
2519 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
2520 | ||
f4ea83dd | 2521 | printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n", |
f698d856 | 2522 | sdata->dev->name, reason); |
f0706e82 | 2523 | |
05c914fe JB |
2524 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
2525 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
f0706e82 JB |
2526 | return -EINVAL; |
2527 | ||
aa458d17 | 2528 | ieee80211_set_disassoc(sdata, ifsta, true, true, reason); |
f0706e82 JB |
2529 | return 0; |
2530 | } | |
2531 | ||
f698d856 | 2532 | int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 2533 | { |
f0706e82 JB |
2534 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
2535 | ||
f4ea83dd | 2536 | printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n", |
f698d856 | 2537 | sdata->dev->name, reason); |
f0706e82 | 2538 | |
05c914fe | 2539 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
f0706e82 JB |
2540 | return -EINVAL; |
2541 | ||
d6f2da5b | 2542 | if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED)) |
f0706e82 JB |
2543 | return -1; |
2544 | ||
aa458d17 | 2545 | ieee80211_set_disassoc(sdata, ifsta, false, true, reason); |
f0706e82 JB |
2546 | return 0; |
2547 | } | |
84363e6e | 2548 | |
9c6bd790 JB |
2549 | /* scan finished notification */ |
2550 | void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) | |
2551 | { | |
2552 | struct ieee80211_sub_if_data *sdata = local->scan_sdata; | |
2553 | struct ieee80211_if_sta *ifsta; | |
2554 | ||
05c914fe | 2555 | if (sdata && sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
9c6bd790 JB |
2556 | ifsta = &sdata->u.sta; |
2557 | if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) || | |
2558 | (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) && | |
2559 | !ieee80211_sta_active_ibss(sdata))) | |
2560 | ieee80211_sta_find_ibss(sdata, ifsta); | |
2561 | } | |
2562 | ||
2563 | /* Restart STA timers */ | |
2564 | rcu_read_lock(); | |
2565 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
2566 | ieee80211_restart_sta_timer(sdata); | |
2567 | rcu_read_unlock(); | |
2568 | } | |
2569 | ||
2570 | /* driver notification call */ | |
84363e6e MA |
2571 | void ieee80211_notify_mac(struct ieee80211_hw *hw, |
2572 | enum ieee80211_notification_types notif_type) | |
2573 | { | |
2574 | struct ieee80211_local *local = hw_to_local(hw); | |
2575 | struct ieee80211_sub_if_data *sdata; | |
2576 | ||
2577 | switch (notif_type) { | |
2578 | case IEEE80211_NOTIFY_RE_ASSOC: | |
2579 | rcu_read_lock(); | |
2580 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
05c914fe | 2581 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
3e122be0 | 2582 | continue; |
84363e6e | 2583 | |
f698d856 | 2584 | ieee80211_sta_req_auth(sdata, &sdata->u.sta); |
84363e6e MA |
2585 | } |
2586 | rcu_read_unlock(); | |
2587 | break; | |
2588 | } | |
2589 | } | |
2590 | EXPORT_SYMBOL(ieee80211_notify_mac); |