Commit | Line | Data |
---|---|---|
f0706e82 JB |
1 | /* |
2 | * BSS client mode implementation | |
3 | * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi> | |
4 | * Copyright 2004, Instant802 Networks, Inc. | |
5 | * Copyright 2005, Devicescape Software, Inc. | |
6 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
7 | * Copyright 2007, Michael Wu <flamingice@sourmilk.net> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
13 | ||
5b323edb | 14 | #include <linux/delay.h> |
f0706e82 JB |
15 | #include <linux/if_ether.h> |
16 | #include <linux/skbuff.h> | |
f0706e82 JB |
17 | #include <linux/if_arp.h> |
18 | #include <linux/wireless.h> | |
19 | #include <linux/random.h> | |
20 | #include <linux/etherdevice.h> | |
d0709a65 | 21 | #include <linux/rtnetlink.h> |
f0706e82 | 22 | #include <net/iw_handler.h> |
f0706e82 | 23 | #include <net/mac80211.h> |
472dbc45 | 24 | #include <asm/unaligned.h> |
60f8b39c | 25 | |
f0706e82 | 26 | #include "ieee80211_i.h" |
2c8dccc7 JB |
27 | #include "rate.h" |
28 | #include "led.h" | |
f0706e82 | 29 | |
6042a3e3 | 30 | #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2 |
f0706e82 JB |
31 | #define IEEE80211_AUTH_TIMEOUT (HZ / 5) |
32 | #define IEEE80211_AUTH_MAX_TRIES 3 | |
33 | #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) | |
34 | #define IEEE80211_ASSOC_MAX_TRIES 3 | |
35 | #define IEEE80211_MONITORING_INTERVAL (2 * HZ) | |
36 | #define IEEE80211_PROBE_INTERVAL (60 * HZ) | |
37 | #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ) | |
38 | #define IEEE80211_SCAN_INTERVAL (2 * HZ) | |
39 | #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ) | |
872ba533 | 40 | #define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ) |
f0706e82 | 41 | |
f0706e82 JB |
42 | #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ) |
43 | #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ) | |
44 | ||
45 | #define IEEE80211_IBSS_MAX_STA_ENTRIES 128 | |
46 | ||
47 | ||
5484e237 JB |
48 | /* utils */ |
49 | static int ecw2cw(int ecw) | |
60f8b39c | 50 | { |
5484e237 | 51 | return (1 << ecw) - 1; |
60f8b39c JB |
52 | } |
53 | ||
c2b13452 | 54 | static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie) |
43ac2ca3 JM |
55 | { |
56 | u8 *end, *pos; | |
57 | ||
58 | pos = bss->ies; | |
59 | if (pos == NULL) | |
60 | return NULL; | |
61 | end = pos + bss->ies_len; | |
62 | ||
63 | while (pos + 1 < end) { | |
64 | if (pos + 2 + pos[1] > end) | |
65 | break; | |
66 | if (pos[0] == ie) | |
67 | return pos; | |
68 | pos += 2 + pos[1]; | |
69 | } | |
70 | ||
71 | return NULL; | |
72 | } | |
73 | ||
c2b13452 | 74 | static int ieee80211_compatible_rates(struct ieee80211_bss *bss, |
9ac19a90 JB |
75 | struct ieee80211_supported_band *sband, |
76 | u64 *rates) | |
77 | { | |
78 | int i, j, count; | |
79 | *rates = 0; | |
80 | count = 0; | |
81 | for (i = 0; i < bss->supp_rates_len; i++) { | |
82 | int rate = (bss->supp_rates[i] & 0x7F) * 5; | |
83 | ||
84 | for (j = 0; j < sband->n_bitrates; j++) | |
85 | if (sband->bitrates[j].bitrate == rate) { | |
86 | *rates |= BIT(j); | |
87 | count++; | |
88 | break; | |
89 | } | |
90 | } | |
91 | ||
92 | return count; | |
93 | } | |
94 | ||
9c6bd790 JB |
95 | /* also used by mesh code */ |
96 | u64 ieee80211_sta_get_rates(struct ieee80211_local *local, | |
97 | struct ieee802_11_elems *elems, | |
98 | enum ieee80211_band band) | |
60f8b39c | 99 | { |
9c6bd790 JB |
100 | struct ieee80211_supported_band *sband; |
101 | struct ieee80211_rate *bitrates; | |
102 | size_t num_rates; | |
103 | u64 supp_rates; | |
104 | int i, j; | |
105 | sband = local->hw.wiphy->bands[band]; | |
60f8b39c | 106 | |
9c6bd790 JB |
107 | if (!sband) { |
108 | WARN_ON(1); | |
109 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
60f8b39c | 110 | } |
60f8b39c | 111 | |
9c6bd790 JB |
112 | bitrates = sband->bitrates; |
113 | num_rates = sband->n_bitrates; | |
114 | supp_rates = 0; | |
115 | for (i = 0; i < elems->supp_rates_len + | |
116 | elems->ext_supp_rates_len; i++) { | |
117 | u8 rate = 0; | |
118 | int own_rate; | |
119 | if (i < elems->supp_rates_len) | |
120 | rate = elems->supp_rates[i]; | |
121 | else if (elems->ext_supp_rates) | |
122 | rate = elems->ext_supp_rates | |
123 | [i - elems->supp_rates_len]; | |
124 | own_rate = 5 * (rate & 0x7f); | |
125 | for (j = 0; j < num_rates; j++) | |
126 | if (bitrates[j].bitrate == own_rate) | |
127 | supp_rates |= BIT(j); | |
128 | } | |
129 | return supp_rates; | |
60f8b39c JB |
130 | } |
131 | ||
9c6bd790 JB |
132 | /* frame sending functions */ |
133 | ||
134 | /* also used by scanning code */ | |
0a51b27e JB |
135 | void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst, |
136 | u8 *ssid, size_t ssid_len) | |
60f8b39c JB |
137 | { |
138 | struct ieee80211_local *local = sdata->local; | |
139 | struct ieee80211_supported_band *sband; | |
140 | struct sk_buff *skb; | |
141 | struct ieee80211_mgmt *mgmt; | |
142 | u8 *pos, *supp_rates, *esupp_rates = NULL; | |
143 | int i; | |
144 | ||
145 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200); | |
146 | if (!skb) { | |
147 | printk(KERN_DEBUG "%s: failed to allocate buffer for probe " | |
148 | "request\n", sdata->dev->name); | |
149 | return; | |
150 | } | |
151 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
152 | ||
153 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
154 | memset(mgmt, 0, 24); | |
155 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
156 | IEEE80211_STYPE_PROBE_REQ); | |
157 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); | |
158 | if (dst) { | |
159 | memcpy(mgmt->da, dst, ETH_ALEN); | |
160 | memcpy(mgmt->bssid, dst, ETH_ALEN); | |
161 | } else { | |
162 | memset(mgmt->da, 0xff, ETH_ALEN); | |
163 | memset(mgmt->bssid, 0xff, ETH_ALEN); | |
164 | } | |
165 | pos = skb_put(skb, 2 + ssid_len); | |
166 | *pos++ = WLAN_EID_SSID; | |
167 | *pos++ = ssid_len; | |
168 | memcpy(pos, ssid, ssid_len); | |
169 | ||
170 | supp_rates = skb_put(skb, 2); | |
171 | supp_rates[0] = WLAN_EID_SUPP_RATES; | |
172 | supp_rates[1] = 0; | |
173 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
174 | ||
175 | for (i = 0; i < sband->n_bitrates; i++) { | |
176 | struct ieee80211_rate *rate = &sband->bitrates[i]; | |
177 | if (esupp_rates) { | |
178 | pos = skb_put(skb, 1); | |
179 | esupp_rates[1]++; | |
180 | } else if (supp_rates[1] == 8) { | |
181 | esupp_rates = skb_put(skb, 3); | |
182 | esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES; | |
183 | esupp_rates[1] = 1; | |
184 | pos = &esupp_rates[2]; | |
185 | } else { | |
186 | pos = skb_put(skb, 1); | |
187 | supp_rates[1]++; | |
188 | } | |
189 | *pos = rate->bitrate / 5; | |
190 | } | |
191 | ||
e50db65c | 192 | ieee80211_tx_skb(sdata, skb, 0); |
60f8b39c JB |
193 | } |
194 | ||
9c6bd790 JB |
195 | static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, |
196 | struct ieee80211_if_sta *ifsta, | |
197 | int transaction, u8 *extra, size_t extra_len, | |
198 | int encrypt) | |
199 | { | |
200 | struct ieee80211_local *local = sdata->local; | |
201 | struct sk_buff *skb; | |
202 | struct ieee80211_mgmt *mgmt; | |
203 | ||
204 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
205 | sizeof(*mgmt) + 6 + extra_len); | |
206 | if (!skb) { | |
207 | printk(KERN_DEBUG "%s: failed to allocate buffer for auth " | |
208 | "frame\n", sdata->dev->name); | |
209 | return; | |
210 | } | |
211 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
212 | ||
213 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); | |
214 | memset(mgmt, 0, 24 + 6); | |
215 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
216 | IEEE80211_STYPE_AUTH); | |
217 | if (encrypt) | |
218 | mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
219 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
220 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); | |
221 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
222 | mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg); | |
223 | mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); | |
224 | ifsta->auth_transaction = transaction + 1; | |
225 | mgmt->u.auth.status_code = cpu_to_le16(0); | |
226 | if (extra) | |
227 | memcpy(skb_put(skb, extra_len), extra, extra_len); | |
228 | ||
229 | ieee80211_tx_skb(sdata, skb, encrypt); | |
230 | } | |
231 | ||
9ac19a90 JB |
232 | static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata, |
233 | struct ieee80211_if_sta *ifsta) | |
234 | { | |
235 | struct ieee80211_local *local = sdata->local; | |
236 | struct sk_buff *skb; | |
237 | struct ieee80211_mgmt *mgmt; | |
d9fe60de | 238 | u8 *pos, *ies, *ht_ie; |
9ac19a90 JB |
239 | int i, len, count, rates_len, supp_rates_len; |
240 | u16 capab; | |
c2b13452 | 241 | struct ieee80211_bss *bss; |
9ac19a90 JB |
242 | int wmm = 0; |
243 | struct ieee80211_supported_band *sband; | |
244 | u64 rates = 0; | |
245 | ||
246 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
247 | sizeof(*mgmt) + 200 + ifsta->extra_ie_len + | |
248 | ifsta->ssid_len); | |
249 | if (!skb) { | |
250 | printk(KERN_DEBUG "%s: failed to allocate buffer for assoc " | |
251 | "frame\n", sdata->dev->name); | |
252 | return; | |
253 | } | |
254 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
255 | ||
256 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
257 | ||
258 | capab = ifsta->capab; | |
259 | ||
260 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) { | |
261 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) | |
262 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; | |
263 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) | |
264 | capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; | |
265 | } | |
266 | ||
267 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, | |
268 | local->hw.conf.channel->center_freq, | |
269 | ifsta->ssid, ifsta->ssid_len); | |
270 | if (bss) { | |
271 | if (bss->capability & WLAN_CAPABILITY_PRIVACY) | |
272 | capab |= WLAN_CAPABILITY_PRIVACY; | |
273 | if (bss->wmm_used) | |
274 | wmm = 1; | |
275 | ||
276 | /* get all rates supported by the device and the AP as | |
277 | * some APs don't like getting a superset of their rates | |
278 | * in the association request (e.g. D-Link DAP 1353 in | |
279 | * b-only mode) */ | |
280 | rates_len = ieee80211_compatible_rates(bss, sband, &rates); | |
281 | ||
282 | if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && | |
283 | (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)) | |
284 | capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; | |
285 | ||
286 | ieee80211_rx_bss_put(local, bss); | |
287 | } else { | |
288 | rates = ~0; | |
289 | rates_len = sband->n_bitrates; | |
290 | } | |
291 | ||
292 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
293 | memset(mgmt, 0, 24); | |
294 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
295 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); | |
296 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
297 | ||
298 | if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) { | |
299 | skb_put(skb, 10); | |
300 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
301 | IEEE80211_STYPE_REASSOC_REQ); | |
302 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); | |
303 | mgmt->u.reassoc_req.listen_interval = | |
304 | cpu_to_le16(local->hw.conf.listen_interval); | |
305 | memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid, | |
306 | ETH_ALEN); | |
307 | } else { | |
308 | skb_put(skb, 4); | |
309 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
310 | IEEE80211_STYPE_ASSOC_REQ); | |
311 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); | |
312 | mgmt->u.reassoc_req.listen_interval = | |
313 | cpu_to_le16(local->hw.conf.listen_interval); | |
314 | } | |
315 | ||
316 | /* SSID */ | |
317 | ies = pos = skb_put(skb, 2 + ifsta->ssid_len); | |
318 | *pos++ = WLAN_EID_SSID; | |
319 | *pos++ = ifsta->ssid_len; | |
320 | memcpy(pos, ifsta->ssid, ifsta->ssid_len); | |
321 | ||
322 | /* add all rates which were marked to be used above */ | |
323 | supp_rates_len = rates_len; | |
324 | if (supp_rates_len > 8) | |
325 | supp_rates_len = 8; | |
326 | ||
327 | len = sband->n_bitrates; | |
328 | pos = skb_put(skb, supp_rates_len + 2); | |
329 | *pos++ = WLAN_EID_SUPP_RATES; | |
330 | *pos++ = supp_rates_len; | |
331 | ||
332 | count = 0; | |
333 | for (i = 0; i < sband->n_bitrates; i++) { | |
334 | if (BIT(i) & rates) { | |
335 | int rate = sband->bitrates[i].bitrate; | |
336 | *pos++ = (u8) (rate / 5); | |
337 | if (++count == 8) | |
338 | break; | |
339 | } | |
340 | } | |
341 | ||
342 | if (rates_len > count) { | |
343 | pos = skb_put(skb, rates_len - count + 2); | |
344 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
345 | *pos++ = rates_len - count; | |
346 | ||
347 | for (i++; i < sband->n_bitrates; i++) { | |
348 | if (BIT(i) & rates) { | |
349 | int rate = sband->bitrates[i].bitrate; | |
350 | *pos++ = (u8) (rate / 5); | |
351 | } | |
352 | } | |
353 | } | |
354 | ||
355 | if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { | |
356 | /* 1. power capabilities */ | |
357 | pos = skb_put(skb, 4); | |
358 | *pos++ = WLAN_EID_PWR_CAPABILITY; | |
359 | *pos++ = 2; | |
360 | *pos++ = 0; /* min tx power */ | |
361 | *pos++ = local->hw.conf.channel->max_power; /* max tx power */ | |
362 | ||
363 | /* 2. supported channels */ | |
364 | /* TODO: get this in reg domain format */ | |
365 | pos = skb_put(skb, 2 * sband->n_channels + 2); | |
366 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; | |
367 | *pos++ = 2 * sband->n_channels; | |
368 | for (i = 0; i < sband->n_channels; i++) { | |
369 | *pos++ = ieee80211_frequency_to_channel( | |
370 | sband->channels[i].center_freq); | |
371 | *pos++ = 1; /* one channel in the subband*/ | |
372 | } | |
373 | } | |
374 | ||
375 | if (ifsta->extra_ie) { | |
376 | pos = skb_put(skb, ifsta->extra_ie_len); | |
377 | memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len); | |
378 | } | |
379 | ||
380 | if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) { | |
381 | pos = skb_put(skb, 9); | |
382 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
383 | *pos++ = 7; /* len */ | |
384 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ | |
385 | *pos++ = 0x50; | |
386 | *pos++ = 0xf2; | |
387 | *pos++ = 2; /* WME */ | |
388 | *pos++ = 0; /* WME info */ | |
389 | *pos++ = 1; /* WME ver */ | |
390 | *pos++ = 0; | |
391 | } | |
392 | ||
393 | /* wmm support is a must to HT */ | |
394 | if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) && | |
d9fe60de JB |
395 | sband->ht_cap.ht_supported && |
396 | (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) && | |
397 | ht_ie[1] >= sizeof(struct ieee80211_ht_info)) { | |
398 | struct ieee80211_ht_info *ht_info = | |
399 | (struct ieee80211_ht_info *)(ht_ie + 2); | |
400 | u16 cap = sband->ht_cap.cap; | |
9ac19a90 JB |
401 | __le16 tmp; |
402 | u32 flags = local->hw.conf.channel->flags; | |
403 | ||
d9fe60de JB |
404 | switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { |
405 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
9ac19a90 | 406 | if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) { |
d9fe60de | 407 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
9ac19a90 JB |
408 | cap &= ~IEEE80211_HT_CAP_SGI_40; |
409 | } | |
410 | break; | |
d9fe60de | 411 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: |
9ac19a90 | 412 | if (flags & IEEE80211_CHAN_NO_FAT_BELOW) { |
d9fe60de | 413 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
9ac19a90 JB |
414 | cap &= ~IEEE80211_HT_CAP_SGI_40; |
415 | } | |
416 | break; | |
417 | } | |
418 | ||
419 | tmp = cpu_to_le16(cap); | |
420 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2); | |
421 | *pos++ = WLAN_EID_HT_CAPABILITY; | |
422 | *pos++ = sizeof(struct ieee80211_ht_cap); | |
423 | memset(pos, 0, sizeof(struct ieee80211_ht_cap)); | |
424 | memcpy(pos, &tmp, sizeof(u16)); | |
425 | pos += sizeof(u16); | |
426 | /* TODO: needs a define here for << 2 */ | |
d9fe60de JB |
427 | *pos++ = sband->ht_cap.ampdu_factor | |
428 | (sband->ht_cap.ampdu_density << 2); | |
429 | memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs)); | |
9ac19a90 JB |
430 | } |
431 | ||
432 | kfree(ifsta->assocreq_ies); | |
433 | ifsta->assocreq_ies_len = (skb->data + skb->len) - ies; | |
434 | ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL); | |
435 | if (ifsta->assocreq_ies) | |
436 | memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len); | |
437 | ||
e50db65c | 438 | ieee80211_tx_skb(sdata, skb, 0); |
9ac19a90 JB |
439 | } |
440 | ||
441 | ||
ef422bc0 JB |
442 | static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, |
443 | u16 stype, u16 reason) | |
9ac19a90 JB |
444 | { |
445 | struct ieee80211_local *local = sdata->local; | |
ef422bc0 | 446 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
9ac19a90 JB |
447 | struct sk_buff *skb; |
448 | struct ieee80211_mgmt *mgmt; | |
449 | ||
450 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); | |
451 | if (!skb) { | |
ef422bc0 JB |
452 | printk(KERN_DEBUG "%s: failed to allocate buffer for " |
453 | "deauth/disassoc frame\n", sdata->dev->name); | |
9ac19a90 JB |
454 | return; |
455 | } | |
456 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
457 | ||
458 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
459 | memset(mgmt, 0, 24); | |
460 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
461 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); | |
462 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
ef422bc0 | 463 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); |
9ac19a90 | 464 | skb_put(skb, 2); |
ef422bc0 | 465 | /* u.deauth.reason_code == u.disassoc.reason_code */ |
9ac19a90 JB |
466 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); |
467 | ||
e50db65c | 468 | ieee80211_tx_skb(sdata, skb, 0); |
9ac19a90 JB |
469 | } |
470 | ||
60f8b39c | 471 | /* MLME */ |
f698d856 | 472 | static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata, |
c2b13452 | 473 | struct ieee80211_bss *bss) |
e2839d8f | 474 | { |
e2839d8f VK |
475 | struct ieee80211_local *local = sdata->local; |
476 | int i, have_higher_than_11mbit = 0; | |
477 | ||
e2839d8f VK |
478 | /* cf. IEEE 802.11 9.2.12 */ |
479 | for (i = 0; i < bss->supp_rates_len; i++) | |
480 | if ((bss->supp_rates[i] & 0x7f) * 5 > 110) | |
481 | have_higher_than_11mbit = 1; | |
482 | ||
483 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
484 | have_higher_than_11mbit) | |
485 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
486 | else | |
487 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
488 | ||
3d35f7c6 | 489 | ieee80211_set_wmm_default(sdata); |
e2839d8f VK |
490 | } |
491 | ||
f698d856 | 492 | static void ieee80211_sta_wmm_params(struct ieee80211_local *local, |
f0706e82 JB |
493 | struct ieee80211_if_sta *ifsta, |
494 | u8 *wmm_param, size_t wmm_param_len) | |
495 | { | |
f0706e82 JB |
496 | struct ieee80211_tx_queue_params params; |
497 | size_t left; | |
498 | int count; | |
499 | u8 *pos; | |
500 | ||
3434fbd3 JB |
501 | if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED)) |
502 | return; | |
503 | ||
504 | if (!wmm_param) | |
505 | return; | |
506 | ||
f0706e82 JB |
507 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) |
508 | return; | |
509 | count = wmm_param[6] & 0x0f; | |
510 | if (count == ifsta->wmm_last_param_set) | |
511 | return; | |
512 | ifsta->wmm_last_param_set = count; | |
513 | ||
514 | pos = wmm_param + 8; | |
515 | left = wmm_param_len - 8; | |
516 | ||
517 | memset(¶ms, 0, sizeof(params)); | |
518 | ||
519 | if (!local->ops->conf_tx) | |
520 | return; | |
521 | ||
522 | local->wmm_acm = 0; | |
523 | for (; left >= 4; left -= 4, pos += 4) { | |
524 | int aci = (pos[0] >> 5) & 0x03; | |
525 | int acm = (pos[0] >> 4) & 0x01; | |
526 | int queue; | |
527 | ||
528 | switch (aci) { | |
529 | case 1: | |
e100bb64 | 530 | queue = 3; |
988c0f72 | 531 | if (acm) |
f0706e82 | 532 | local->wmm_acm |= BIT(0) | BIT(3); |
f0706e82 JB |
533 | break; |
534 | case 2: | |
e100bb64 | 535 | queue = 1; |
988c0f72 | 536 | if (acm) |
f0706e82 | 537 | local->wmm_acm |= BIT(4) | BIT(5); |
f0706e82 JB |
538 | break; |
539 | case 3: | |
e100bb64 | 540 | queue = 0; |
988c0f72 | 541 | if (acm) |
f0706e82 | 542 | local->wmm_acm |= BIT(6) | BIT(7); |
f0706e82 JB |
543 | break; |
544 | case 0: | |
545 | default: | |
e100bb64 | 546 | queue = 2; |
988c0f72 | 547 | if (acm) |
f0706e82 | 548 | local->wmm_acm |= BIT(1) | BIT(2); |
f0706e82 JB |
549 | break; |
550 | } | |
551 | ||
552 | params.aifs = pos[0] & 0x0f; | |
553 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); | |
554 | params.cw_min = ecw2cw(pos[1] & 0x0f); | |
f434b2d1 | 555 | params.txop = get_unaligned_le16(pos + 2); |
f4ea83dd | 556 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
f0706e82 | 557 | printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d " |
3330d7be | 558 | "cWmin=%d cWmax=%d txop=%d\n", |
f698d856 | 559 | local->mdev->name, queue, aci, acm, params.aifs, params.cw_min, |
3330d7be JB |
560 | params.cw_max, params.txop); |
561 | #endif | |
f0706e82 JB |
562 | /* TODO: handle ACM (block TX, fallback to next lowest allowed |
563 | * AC for now) */ | |
564 | if (local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) { | |
565 | printk(KERN_DEBUG "%s: failed to set TX queue " | |
f698d856 | 566 | "parameters for queue %d\n", local->mdev->name, queue); |
f0706e82 JB |
567 | } |
568 | } | |
569 | } | |
570 | ||
7a5158ef JB |
571 | static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, |
572 | u16 capab, bool erp_valid, u8 erp) | |
5628221c | 573 | { |
bda3933a | 574 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
ebd74487 | 575 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
5628221c | 576 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
ebd74487 | 577 | #endif |
471b3efd | 578 | u32 changed = 0; |
7a5158ef JB |
579 | bool use_protection; |
580 | bool use_short_preamble; | |
581 | bool use_short_slot; | |
582 | ||
583 | if (erp_valid) { | |
584 | use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; | |
585 | use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; | |
586 | } else { | |
587 | use_protection = false; | |
588 | use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); | |
589 | } | |
590 | ||
591 | use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); | |
5628221c | 592 | |
471b3efd | 593 | if (use_protection != bss_conf->use_cts_prot) { |
f4ea83dd | 594 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
5628221c | 595 | if (net_ratelimit()) { |
0c68ae26 | 596 | printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n", |
471b3efd | 597 | sdata->dev->name, |
5628221c | 598 | use_protection ? "enabled" : "disabled", |
0c68ae26 | 599 | ifsta->bssid); |
5628221c | 600 | } |
f4ea83dd | 601 | #endif |
471b3efd JB |
602 | bss_conf->use_cts_prot = use_protection; |
603 | changed |= BSS_CHANGED_ERP_CTS_PROT; | |
5628221c | 604 | } |
7e9ed188 | 605 | |
d43c7b37 | 606 | if (use_short_preamble != bss_conf->use_short_preamble) { |
f4ea83dd | 607 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
7e9ed188 DD |
608 | if (net_ratelimit()) { |
609 | printk(KERN_DEBUG "%s: switched to %s barker preamble" | |
0c68ae26 | 610 | " (BSSID=%pM)\n", |
471b3efd | 611 | sdata->dev->name, |
d43c7b37 | 612 | use_short_preamble ? "short" : "long", |
0c68ae26 | 613 | ifsta->bssid); |
7e9ed188 | 614 | } |
f4ea83dd | 615 | #endif |
d43c7b37 | 616 | bss_conf->use_short_preamble = use_short_preamble; |
471b3efd | 617 | changed |= BSS_CHANGED_ERP_PREAMBLE; |
7e9ed188 | 618 | } |
d9430a32 | 619 | |
7a5158ef JB |
620 | if (use_short_slot != bss_conf->use_short_slot) { |
621 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
622 | if (net_ratelimit()) { | |
623 | printk(KERN_DEBUG "%s: switched to %s slot" | |
624 | " (BSSID=%s)\n", | |
625 | sdata->dev->name, | |
626 | use_short_slot ? "short" : "long", | |
627 | ifsta->bssid); | |
628 | } | |
629 | #endif | |
630 | bss_conf->use_short_slot = use_short_slot; | |
631 | changed |= BSS_CHANGED_ERP_SLOT; | |
50c4afb9 JL |
632 | } |
633 | ||
634 | return changed; | |
635 | } | |
636 | ||
f5e5bf25 TW |
637 | static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata, |
638 | struct ieee80211_if_sta *ifsta) | |
639 | { | |
640 | union iwreq_data wrqu; | |
641 | memset(&wrqu, 0, sizeof(wrqu)); | |
642 | if (ifsta->flags & IEEE80211_STA_ASSOCIATED) | |
643 | memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN); | |
644 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; | |
645 | wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL); | |
646 | } | |
647 | ||
f698d856 | 648 | static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
649 | struct ieee80211_if_sta *ifsta) |
650 | { | |
74af0250 LT |
651 | char *buf; |
652 | size_t len; | |
653 | int i; | |
f0706e82 JB |
654 | union iwreq_data wrqu; |
655 | ||
74af0250 LT |
656 | if (!ifsta->assocreq_ies && !ifsta->assocresp_ies) |
657 | return; | |
658 | ||
659 | buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len + | |
660 | ifsta->assocresp_ies_len), GFP_KERNEL); | |
661 | if (!buf) | |
662 | return; | |
663 | ||
664 | len = sprintf(buf, "ASSOCINFO("); | |
f0706e82 | 665 | if (ifsta->assocreq_ies) { |
74af0250 LT |
666 | len += sprintf(buf + len, "ReqIEs="); |
667 | for (i = 0; i < ifsta->assocreq_ies_len; i++) { | |
668 | len += sprintf(buf + len, "%02x", | |
669 | ifsta->assocreq_ies[i]); | |
670 | } | |
f0706e82 | 671 | } |
087d833e | 672 | if (ifsta->assocresp_ies) { |
74af0250 LT |
673 | if (ifsta->assocreq_ies) |
674 | len += sprintf(buf + len, " "); | |
675 | len += sprintf(buf + len, "RespIEs="); | |
676 | for (i = 0; i < ifsta->assocresp_ies_len; i++) { | |
677 | len += sprintf(buf + len, "%02x", | |
678 | ifsta->assocresp_ies[i]); | |
679 | } | |
f0706e82 | 680 | } |
74af0250 LT |
681 | len += sprintf(buf + len, ")"); |
682 | ||
683 | if (len > IW_CUSTOM_MAX) { | |
684 | len = sprintf(buf, "ASSOCRESPIE="); | |
685 | for (i = 0; i < ifsta->assocresp_ies_len; i++) { | |
686 | len += sprintf(buf + len, "%02x", | |
687 | ifsta->assocresp_ies[i]); | |
688 | } | |
689 | } | |
690 | ||
ad788b5e JL |
691 | if (len <= IW_CUSTOM_MAX) { |
692 | memset(&wrqu, 0, sizeof(wrqu)); | |
693 | wrqu.data.length = len; | |
694 | wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf); | |
695 | } | |
74af0250 LT |
696 | |
697 | kfree(buf); | |
f0706e82 JB |
698 | } |
699 | ||
700 | ||
f698d856 | 701 | static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
ae5eb026 JB |
702 | struct ieee80211_if_sta *ifsta, |
703 | u32 bss_info_changed) | |
f0706e82 | 704 | { |
471b3efd | 705 | struct ieee80211_local *local = sdata->local; |
38668c05 | 706 | struct ieee80211_conf *conf = &local_to_hw(local)->conf; |
f0706e82 | 707 | |
c2b13452 | 708 | struct ieee80211_bss *bss; |
d6f2da5b | 709 | |
ae5eb026 | 710 | bss_info_changed |= BSS_CHANGED_ASSOC; |
f5e5bf25 | 711 | ifsta->flags |= IEEE80211_STA_ASSOCIATED; |
5628221c | 712 | |
05c914fe | 713 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
f5e5bf25 | 714 | return; |
21c0cbe7 | 715 | |
f5e5bf25 TW |
716 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
717 | conf->channel->center_freq, | |
718 | ifsta->ssid, ifsta->ssid_len); | |
719 | if (bss) { | |
720 | /* set timing information */ | |
bda3933a JB |
721 | sdata->vif.bss_conf.beacon_int = bss->beacon_int; |
722 | sdata->vif.bss_conf.timestamp = bss->timestamp; | |
723 | sdata->vif.bss_conf.dtim_period = bss->dtim_period; | |
21c0cbe7 | 724 | |
ae5eb026 | 725 | bss_info_changed |= ieee80211_handle_bss_capability(sdata, |
7a5158ef | 726 | bss->capability, bss->has_erp_value, bss->erp_value); |
9ac19a90 JB |
727 | |
728 | ieee80211_rx_bss_put(local, bss); | |
f0706e82 JB |
729 | } |
730 | ||
9ac19a90 JB |
731 | ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET; |
732 | memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN); | |
733 | ieee80211_sta_send_associnfo(sdata, ifsta); | |
9306102e | 734 | |
9ac19a90 JB |
735 | ifsta->last_probe = jiffies; |
736 | ieee80211_led_assoc(local, 1); | |
9306102e | 737 | |
bda3933a | 738 | sdata->vif.bss_conf.assoc = 1; |
96dd22ac JB |
739 | /* |
740 | * For now just always ask the driver to update the basic rateset | |
741 | * when we have associated, we aren't checking whether it actually | |
742 | * changed or not. | |
743 | */ | |
ae5eb026 JB |
744 | bss_info_changed |= BSS_CHANGED_BASIC_RATES; |
745 | ieee80211_bss_info_change_notify(sdata, bss_info_changed); | |
f0706e82 | 746 | |
9ac19a90 JB |
747 | netif_tx_start_all_queues(sdata->dev); |
748 | netif_carrier_on(sdata->dev); | |
f0706e82 | 749 | |
9ac19a90 | 750 | ieee80211_sta_send_apinfo(sdata, ifsta); |
f0706e82 JB |
751 | } |
752 | ||
9ac19a90 JB |
753 | static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata, |
754 | struct ieee80211_if_sta *ifsta) | |
f0706e82 | 755 | { |
9ac19a90 JB |
756 | ifsta->direct_probe_tries++; |
757 | if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0c68ae26 JB |
758 | printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n", |
759 | sdata->dev->name, ifsta->bssid); | |
9ac19a90 | 760 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
4a68ec53 | 761 | ieee80211_sta_send_apinfo(sdata, ifsta); |
f0706e82 JB |
762 | return; |
763 | } | |
f0706e82 | 764 | |
0c68ae26 JB |
765 | printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n", |
766 | sdata->dev->name, ifsta->bssid, | |
9ac19a90 | 767 | ifsta->direct_probe_tries); |
f0706e82 | 768 | |
9ac19a90 | 769 | ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
f0706e82 | 770 | |
9ac19a90 JB |
771 | set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request); |
772 | ||
773 | /* Direct probe is sent to broadcast address as some APs | |
774 | * will not answer to direct packet in unassociated state. | |
775 | */ | |
776 | ieee80211_send_probe_req(sdata, NULL, | |
777 | ifsta->ssid, ifsta->ssid_len); | |
778 | ||
779 | mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT); | |
60f8b39c | 780 | } |
f0706e82 | 781 | |
9ac19a90 JB |
782 | |
783 | static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata, | |
784 | struct ieee80211_if_sta *ifsta) | |
f0706e82 | 785 | { |
9ac19a90 JB |
786 | ifsta->auth_tries++; |
787 | if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0c68ae26 | 788 | printk(KERN_DEBUG "%s: authentication with AP %pM" |
9ac19a90 | 789 | " timed out\n", |
0c68ae26 | 790 | sdata->dev->name, ifsta->bssid); |
9ac19a90 | 791 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
4a68ec53 | 792 | ieee80211_sta_send_apinfo(sdata, ifsta); |
f0706e82 JB |
793 | return; |
794 | } | |
f0706e82 | 795 | |
9ac19a90 | 796 | ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE; |
0c68ae26 JB |
797 | printk(KERN_DEBUG "%s: authenticate with AP %pM\n", |
798 | sdata->dev->name, ifsta->bssid); | |
f0706e82 | 799 | |
9ac19a90 JB |
800 | ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0); |
801 | ||
802 | mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT); | |
f0706e82 JB |
803 | } |
804 | ||
aa458d17 TW |
805 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, |
806 | struct ieee80211_if_sta *ifsta, bool deauth, | |
807 | bool self_disconnected, u16 reason) | |
808 | { | |
809 | struct ieee80211_local *local = sdata->local; | |
810 | struct sta_info *sta; | |
ae5eb026 | 811 | u32 changed = 0; |
aa458d17 TW |
812 | |
813 | rcu_read_lock(); | |
814 | ||
815 | sta = sta_info_get(local, ifsta->bssid); | |
816 | if (!sta) { | |
817 | rcu_read_unlock(); | |
818 | return; | |
819 | } | |
820 | ||
821 | if (deauth) { | |
822 | ifsta->direct_probe_tries = 0; | |
823 | ifsta->auth_tries = 0; | |
824 | } | |
825 | ifsta->assoc_scan_tries = 0; | |
826 | ifsta->assoc_tries = 0; | |
827 | ||
24e64622 | 828 | netif_tx_stop_all_queues(sdata->dev); |
aa458d17 TW |
829 | netif_carrier_off(sdata->dev); |
830 | ||
17741cdc | 831 | ieee80211_sta_tear_down_BA_sessions(sdata, sta->sta.addr); |
aa458d17 TW |
832 | |
833 | if (self_disconnected) { | |
834 | if (deauth) | |
ef422bc0 JB |
835 | ieee80211_send_deauth_disassoc(sdata, |
836 | IEEE80211_STYPE_DEAUTH, reason); | |
aa458d17 | 837 | else |
ef422bc0 JB |
838 | ieee80211_send_deauth_disassoc(sdata, |
839 | IEEE80211_STYPE_DISASSOC, reason); | |
aa458d17 TW |
840 | } |
841 | ||
f5e5bf25 TW |
842 | ifsta->flags &= ~IEEE80211_STA_ASSOCIATED; |
843 | changed |= ieee80211_reset_erp_info(sdata); | |
844 | ||
f5e5bf25 | 845 | ieee80211_led_assoc(local, 0); |
ae5eb026 JB |
846 | changed |= BSS_CHANGED_ASSOC; |
847 | sdata->vif.bss_conf.assoc = false; | |
f5e5bf25 TW |
848 | |
849 | ieee80211_sta_send_apinfo(sdata, ifsta); | |
aa458d17 TW |
850 | |
851 | if (self_disconnected) | |
852 | ifsta->state = IEEE80211_STA_MLME_DISABLED; | |
853 | ||
854 | sta_info_unlink(&sta); | |
855 | ||
856 | rcu_read_unlock(); | |
857 | ||
858 | sta_info_destroy(sta); | |
ae5eb026 JB |
859 | |
860 | local->hw.conf.ht.enabled = false; | |
861 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_HT); | |
862 | ||
863 | ieee80211_bss_info_change_notify(sdata, changed); | |
aa458d17 | 864 | } |
f0706e82 | 865 | |
9ac19a90 JB |
866 | static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata) |
867 | { | |
868 | if (!sdata || !sdata->default_key || | |
869 | sdata->default_key->conf.alg != ALG_WEP) | |
870 | return 0; | |
871 | return 1; | |
872 | } | |
873 | ||
f698d856 | 874 | static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
875 | struct ieee80211_if_sta *ifsta) |
876 | { | |
f698d856 | 877 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 878 | struct ieee80211_bss *bss; |
5b98b1f7 JB |
879 | int bss_privacy; |
880 | int wep_privacy; | |
881 | int privacy_invoked; | |
f0706e82 | 882 | |
5b98b1f7 | 883 | if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL)) |
f0706e82 JB |
884 | return 0; |
885 | ||
f698d856 | 886 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
8318d78a | 887 | local->hw.conf.channel->center_freq, |
cffdd30d | 888 | ifsta->ssid, ifsta->ssid_len); |
f0706e82 JB |
889 | if (!bss) |
890 | return 0; | |
891 | ||
5b98b1f7 | 892 | bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY); |
f698d856 | 893 | wep_privacy = !!ieee80211_sta_wep_configured(sdata); |
5b98b1f7 | 894 | privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED); |
f0706e82 | 895 | |
3e122be0 | 896 | ieee80211_rx_bss_put(local, bss); |
f0706e82 | 897 | |
5b98b1f7 JB |
898 | if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked)) |
899 | return 0; | |
900 | ||
901 | return 1; | |
f0706e82 JB |
902 | } |
903 | ||
f698d856 | 904 | static void ieee80211_associate(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
905 | struct ieee80211_if_sta *ifsta) |
906 | { | |
907 | ifsta->assoc_tries++; | |
908 | if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) { | |
0c68ae26 | 909 | printk(KERN_DEBUG "%s: association with AP %pM" |
f0706e82 | 910 | " timed out\n", |
0c68ae26 | 911 | sdata->dev->name, ifsta->bssid); |
48c2fc59 | 912 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
4a68ec53 | 913 | ieee80211_sta_send_apinfo(sdata, ifsta); |
f0706e82 JB |
914 | return; |
915 | } | |
916 | ||
48c2fc59 | 917 | ifsta->state = IEEE80211_STA_MLME_ASSOCIATE; |
0c68ae26 JB |
918 | printk(KERN_DEBUG "%s: associate with AP %pM\n", |
919 | sdata->dev->name, ifsta->bssid); | |
f698d856 | 920 | if (ieee80211_privacy_mismatch(sdata, ifsta)) { |
f0706e82 | 921 | printk(KERN_DEBUG "%s: mismatch in privacy configuration and " |
f698d856 | 922 | "mixed-cell disabled - abort association\n", sdata->dev->name); |
48c2fc59 | 923 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
f0706e82 JB |
924 | return; |
925 | } | |
926 | ||
f698d856 | 927 | ieee80211_send_assoc(sdata, ifsta); |
f0706e82 JB |
928 | |
929 | mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT); | |
930 | } | |
931 | ||
932 | ||
f698d856 | 933 | static void ieee80211_associated(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
934 | struct ieee80211_if_sta *ifsta) |
935 | { | |
f698d856 | 936 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
937 | struct sta_info *sta; |
938 | int disassoc; | |
939 | ||
940 | /* TODO: start monitoring current AP signal quality and number of | |
941 | * missed beacons. Scan other channels every now and then and search | |
942 | * for better APs. */ | |
943 | /* TODO: remove expired BSSes */ | |
944 | ||
48c2fc59 | 945 | ifsta->state = IEEE80211_STA_MLME_ASSOCIATED; |
f0706e82 | 946 | |
d0709a65 JB |
947 | rcu_read_lock(); |
948 | ||
f0706e82 JB |
949 | sta = sta_info_get(local, ifsta->bssid); |
950 | if (!sta) { | |
0c68ae26 JB |
951 | printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n", |
952 | sdata->dev->name, ifsta->bssid); | |
f0706e82 JB |
953 | disassoc = 1; |
954 | } else { | |
955 | disassoc = 0; | |
956 | if (time_after(jiffies, | |
957 | sta->last_rx + IEEE80211_MONITORING_INTERVAL)) { | |
d6f2da5b | 958 | if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) { |
f0706e82 | 959 | printk(KERN_DEBUG "%s: No ProbeResp from " |
0c68ae26 | 960 | "current AP %pM - assume out of " |
f0706e82 | 961 | "range\n", |
0c68ae26 | 962 | sdata->dev->name, ifsta->bssid); |
f0706e82 | 963 | disassoc = 1; |
d6f2da5b | 964 | } else |
f698d856 | 965 | ieee80211_send_probe_req(sdata, ifsta->bssid, |
4dfe51e1 JB |
966 | ifsta->ssid, |
967 | ifsta->ssid_len); | |
d6f2da5b | 968 | ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL; |
f0706e82 | 969 | } else { |
d6f2da5b | 970 | ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL; |
f0706e82 JB |
971 | if (time_after(jiffies, ifsta->last_probe + |
972 | IEEE80211_PROBE_INTERVAL)) { | |
973 | ifsta->last_probe = jiffies; | |
f698d856 | 974 | ieee80211_send_probe_req(sdata, ifsta->bssid, |
f0706e82 JB |
975 | ifsta->ssid, |
976 | ifsta->ssid_len); | |
977 | } | |
978 | } | |
f0706e82 | 979 | } |
d0709a65 JB |
980 | |
981 | rcu_read_unlock(); | |
982 | ||
60f8b39c JB |
983 | if (disassoc) |
984 | ieee80211_set_disassoc(sdata, ifsta, true, true, | |
985 | WLAN_REASON_PREV_AUTH_NOT_VALID); | |
986 | else | |
987 | mod_timer(&ifsta->timer, jiffies + | |
988 | IEEE80211_MONITORING_INTERVAL); | |
f0706e82 JB |
989 | } |
990 | ||
991 | ||
f698d856 | 992 | static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
993 | struct ieee80211_if_sta *ifsta) |
994 | { | |
f698d856 | 995 | printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name); |
d6f2da5b | 996 | ifsta->flags |= IEEE80211_STA_AUTHENTICATED; |
f698d856 | 997 | ieee80211_associate(sdata, ifsta); |
f0706e82 JB |
998 | } |
999 | ||
1000 | ||
f698d856 | 1001 | static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1002 | struct ieee80211_if_sta *ifsta, |
1003 | struct ieee80211_mgmt *mgmt, | |
1004 | size_t len) | |
1005 | { | |
1006 | u8 *pos; | |
1007 | struct ieee802_11_elems elems; | |
1008 | ||
f0706e82 | 1009 | pos = mgmt->u.auth.variable; |
67a4cce4 | 1010 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
f4ea83dd | 1011 | if (!elems.challenge) |
f0706e82 | 1012 | return; |
f698d856 | 1013 | ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2, |
f0706e82 JB |
1014 | elems.challenge_len + 2, 1); |
1015 | } | |
1016 | ||
f698d856 | 1017 | static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1018 | struct ieee80211_if_sta *ifsta, |
1019 | struct ieee80211_mgmt *mgmt, | |
1020 | size_t len) | |
1021 | { | |
f0706e82 JB |
1022 | u16 auth_alg, auth_transaction, status_code; |
1023 | ||
48c2fc59 | 1024 | if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE && |
05c914fe | 1025 | sdata->vif.type != NL80211_IFTYPE_ADHOC) |
f0706e82 | 1026 | return; |
f0706e82 | 1027 | |
f4ea83dd | 1028 | if (len < 24 + 6) |
f0706e82 | 1029 | return; |
f0706e82 | 1030 | |
05c914fe | 1031 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC && |
f4ea83dd | 1032 | memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1033 | return; |
f0706e82 | 1034 | |
05c914fe | 1035 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC && |
f4ea83dd | 1036 | memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) |
f0706e82 | 1037 | return; |
f0706e82 JB |
1038 | |
1039 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
1040 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
1041 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
1042 | ||
05c914fe | 1043 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
135a2110 JB |
1044 | /* |
1045 | * IEEE 802.11 standard does not require authentication in IBSS | |
f0706e82 JB |
1046 | * networks and most implementations do not seem to use it. |
1047 | * However, try to reply to authentication attempts if someone | |
1048 | * has actually implemented this. | |
135a2110 | 1049 | */ |
f4ea83dd | 1050 | if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) |
f0706e82 | 1051 | return; |
f698d856 | 1052 | ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0); |
f0706e82 JB |
1053 | } |
1054 | ||
1055 | if (auth_alg != ifsta->auth_alg || | |
f4ea83dd | 1056 | auth_transaction != ifsta->auth_transaction) |
f0706e82 | 1057 | return; |
f0706e82 JB |
1058 | |
1059 | if (status_code != WLAN_STATUS_SUCCESS) { | |
f0706e82 JB |
1060 | if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) { |
1061 | u8 algs[3]; | |
1062 | const int num_algs = ARRAY_SIZE(algs); | |
1063 | int i, pos; | |
1064 | algs[0] = algs[1] = algs[2] = 0xff; | |
1065 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
1066 | algs[0] = WLAN_AUTH_OPEN; | |
1067 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
1068 | algs[1] = WLAN_AUTH_SHARED_KEY; | |
1069 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
1070 | algs[2] = WLAN_AUTH_LEAP; | |
1071 | if (ifsta->auth_alg == WLAN_AUTH_OPEN) | |
1072 | pos = 0; | |
1073 | else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY) | |
1074 | pos = 1; | |
1075 | else | |
1076 | pos = 2; | |
1077 | for (i = 0; i < num_algs; i++) { | |
1078 | pos++; | |
1079 | if (pos >= num_algs) | |
1080 | pos = 0; | |
1081 | if (algs[pos] == ifsta->auth_alg || | |
1082 | algs[pos] == 0xff) | |
1083 | continue; | |
1084 | if (algs[pos] == WLAN_AUTH_SHARED_KEY && | |
f698d856 | 1085 | !ieee80211_sta_wep_configured(sdata)) |
f0706e82 JB |
1086 | continue; |
1087 | ifsta->auth_alg = algs[pos]; | |
f0706e82 JB |
1088 | break; |
1089 | } | |
1090 | } | |
1091 | return; | |
1092 | } | |
1093 | ||
1094 | switch (ifsta->auth_alg) { | |
1095 | case WLAN_AUTH_OPEN: | |
1096 | case WLAN_AUTH_LEAP: | |
f698d856 | 1097 | ieee80211_auth_completed(sdata, ifsta); |
f0706e82 JB |
1098 | break; |
1099 | case WLAN_AUTH_SHARED_KEY: | |
1100 | if (ifsta->auth_transaction == 4) | |
f698d856 | 1101 | ieee80211_auth_completed(sdata, ifsta); |
f0706e82 | 1102 | else |
f698d856 | 1103 | ieee80211_auth_challenge(sdata, ifsta, mgmt, len); |
f0706e82 JB |
1104 | break; |
1105 | } | |
1106 | } | |
1107 | ||
1108 | ||
f698d856 | 1109 | static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1110 | struct ieee80211_if_sta *ifsta, |
1111 | struct ieee80211_mgmt *mgmt, | |
1112 | size_t len) | |
1113 | { | |
1114 | u16 reason_code; | |
1115 | ||
f4ea83dd | 1116 | if (len < 24 + 2) |
f0706e82 | 1117 | return; |
f0706e82 | 1118 | |
f4ea83dd | 1119 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1120 | return; |
f0706e82 JB |
1121 | |
1122 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
1123 | ||
988c0f72 | 1124 | if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) |
97c8b013 ZY |
1125 | printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n", |
1126 | sdata->dev->name, reason_code); | |
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) |
97c8b013 ZY |
1157 | printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n", |
1158 | sdata->dev->name, reason_code); | |
f0706e82 | 1159 | |
48c2fc59 TW |
1160 | if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) { |
1161 | ifsta->state = IEEE80211_STA_MLME_ASSOCIATE; | |
f0706e82 JB |
1162 | mod_timer(&ifsta->timer, jiffies + |
1163 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1164 | } | |
1165 | ||
aa458d17 | 1166 | ieee80211_set_disassoc(sdata, ifsta, false, false, 0); |
f0706e82 JB |
1167 | } |
1168 | ||
1169 | ||
471b3efd | 1170 | static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1171 | struct ieee80211_if_sta *ifsta, |
1172 | struct ieee80211_mgmt *mgmt, | |
1173 | size_t len, | |
1174 | int reassoc) | |
1175 | { | |
471b3efd | 1176 | struct ieee80211_local *local = sdata->local; |
8318d78a | 1177 | struct ieee80211_supported_band *sband; |
f0706e82 | 1178 | struct sta_info *sta; |
8318d78a | 1179 | u64 rates, basic_rates; |
f0706e82 JB |
1180 | u16 capab_info, status_code, aid; |
1181 | struct ieee802_11_elems elems; | |
bda3933a | 1182 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
f0706e82 | 1183 | u8 *pos; |
ae5eb026 | 1184 | u32 changed = 0; |
f0706e82 | 1185 | int i, j; |
ddf4ac53 | 1186 | bool have_higher_than_11mbit = false, newsta = false; |
ae5eb026 | 1187 | u16 ap_ht_cap_flags; |
f0706e82 JB |
1188 | |
1189 | /* AssocResp and ReassocResp have identical structure, so process both | |
1190 | * of them in this function. */ | |
1191 | ||
48c2fc59 | 1192 | if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE) |
f0706e82 | 1193 | return; |
f0706e82 | 1194 | |
f4ea83dd | 1195 | if (len < 24 + 6) |
f0706e82 | 1196 | return; |
f0706e82 | 1197 | |
f4ea83dd | 1198 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1199 | return; |
f0706e82 JB |
1200 | |
1201 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
1202 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
1203 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
f0706e82 | 1204 | |
0c68ae26 | 1205 | printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x " |
f0706e82 | 1206 | "status=%d aid=%d)\n", |
0c68ae26 | 1207 | sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa, |
ddd68587 | 1208 | capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); |
f0706e82 JB |
1209 | |
1210 | if (status_code != WLAN_STATUS_SUCCESS) { | |
1211 | printk(KERN_DEBUG "%s: AP denied association (code=%d)\n", | |
f698d856 | 1212 | sdata->dev->name, status_code); |
8a69aa93 DD |
1213 | /* if this was a reassociation, ensure we try a "full" |
1214 | * association next time. This works around some broken APs | |
1215 | * which do not correctly reject reassociation requests. */ | |
d6f2da5b | 1216 | ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
f0706e82 JB |
1217 | return; |
1218 | } | |
1219 | ||
1dd84aa2 JB |
1220 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
1221 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " | |
f698d856 | 1222 | "set\n", sdata->dev->name, aid); |
1dd84aa2 JB |
1223 | aid &= ~(BIT(15) | BIT(14)); |
1224 | ||
f0706e82 | 1225 | pos = mgmt->u.assoc_resp.variable; |
67a4cce4 | 1226 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
f0706e82 JB |
1227 | |
1228 | if (!elems.supp_rates) { | |
1229 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", | |
f698d856 | 1230 | sdata->dev->name); |
f0706e82 JB |
1231 | return; |
1232 | } | |
1233 | ||
f698d856 | 1234 | printk(KERN_DEBUG "%s: associated\n", sdata->dev->name); |
f0706e82 JB |
1235 | ifsta->aid = aid; |
1236 | ifsta->ap_capab = capab_info; | |
1237 | ||
1238 | kfree(ifsta->assocresp_ies); | |
1239 | ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt); | |
0ec0b7ac | 1240 | ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL); |
f0706e82 JB |
1241 | if (ifsta->assocresp_ies) |
1242 | memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len); | |
1243 | ||
d0709a65 JB |
1244 | rcu_read_lock(); |
1245 | ||
f0706e82 JB |
1246 | /* Add STA entry for the AP */ |
1247 | sta = sta_info_get(local, ifsta->bssid); | |
1248 | if (!sta) { | |
c2b13452 | 1249 | struct ieee80211_bss *bss; |
ddf4ac53 JB |
1250 | |
1251 | newsta = true; | |
d0709a65 | 1252 | |
73651ee6 JB |
1253 | sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC); |
1254 | if (!sta) { | |
1255 | printk(KERN_DEBUG "%s: failed to alloc STA entry for" | |
f698d856 | 1256 | " the AP\n", sdata->dev->name); |
d0709a65 | 1257 | rcu_read_unlock(); |
f0706e82 JB |
1258 | return; |
1259 | } | |
60f8b39c JB |
1260 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
1261 | local->hw.conf.channel->center_freq, | |
1262 | ifsta->ssid, ifsta->ssid_len); | |
1263 | if (bss) { | |
1264 | sta->last_signal = bss->signal; | |
1265 | sta->last_qual = bss->qual; | |
1266 | sta->last_noise = bss->noise; | |
1267 | ieee80211_rx_bss_put(local, bss); | |
1268 | } | |
f709fc69 | 1269 | |
60f8b39c JB |
1270 | /* update new sta with its last rx activity */ |
1271 | sta->last_rx = jiffies; | |
f709fc69 | 1272 | } |
f709fc69 | 1273 | |
60f8b39c JB |
1274 | /* |
1275 | * FIXME: Do we really need to update the sta_info's information here? | |
1276 | * We already know about the AP (we found it in our list) so it | |
1277 | * should already be filled with the right info, no? | |
1278 | * As is stands, all this is racy because typically we assume | |
1279 | * the information that is filled in here (except flags) doesn't | |
1280 | * change while a STA structure is alive. As such, it should move | |
1281 | * to between the sta_info_alloc() and sta_info_insert() above. | |
1282 | */ | |
f709fc69 | 1283 | |
60f8b39c JB |
1284 | set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP | |
1285 | WLAN_STA_AUTHORIZED); | |
05e5e883 | 1286 | |
60f8b39c JB |
1287 | rates = 0; |
1288 | basic_rates = 0; | |
1289 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
f709fc69 | 1290 | |
60f8b39c JB |
1291 | for (i = 0; i < elems.supp_rates_len; i++) { |
1292 | int rate = (elems.supp_rates[i] & 0x7f) * 5; | |
d61272cb | 1293 | bool is_basic = !!(elems.supp_rates[i] & 0x80); |
f709fc69 | 1294 | |
60f8b39c JB |
1295 | if (rate > 110) |
1296 | have_higher_than_11mbit = true; | |
1297 | ||
1298 | for (j = 0; j < sband->n_bitrates; j++) { | |
d61272cb | 1299 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1300 | rates |= BIT(j); |
d61272cb TW |
1301 | if (is_basic) |
1302 | basic_rates |= BIT(j); | |
1303 | break; | |
1304 | } | |
f709fc69 | 1305 | } |
f709fc69 LCC |
1306 | } |
1307 | ||
60f8b39c JB |
1308 | for (i = 0; i < elems.ext_supp_rates_len; i++) { |
1309 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; | |
d61272cb | 1310 | bool is_basic = !!(elems.supp_rates[i] & 0x80); |
f0706e82 | 1311 | |
60f8b39c JB |
1312 | if (rate > 110) |
1313 | have_higher_than_11mbit = true; | |
f0706e82 | 1314 | |
60f8b39c | 1315 | for (j = 0; j < sband->n_bitrates; j++) { |
d61272cb | 1316 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1317 | rates |= BIT(j); |
d61272cb TW |
1318 | if (is_basic) |
1319 | basic_rates |= BIT(j); | |
1320 | break; | |
1321 | } | |
60f8b39c | 1322 | } |
1ebebea8 | 1323 | } |
f0706e82 | 1324 | |
323ce79a | 1325 | sta->sta.supp_rates[local->hw.conf.channel->band] = rates; |
bda3933a | 1326 | sdata->vif.bss_conf.basic_rates = basic_rates; |
60f8b39c JB |
1327 | |
1328 | /* cf. IEEE 802.11 9.2.12 */ | |
1329 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
1330 | have_higher_than_11mbit) | |
1331 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
1332 | else | |
1333 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
f0706e82 | 1334 | |
ae5eb026 JB |
1335 | if (elems.ht_cap_elem) |
1336 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, | |
d9fe60de | 1337 | elems.ht_cap_elem, &sta->sta.ht_cap); |
ae5eb026 JB |
1338 | |
1339 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
f0706e82 | 1340 | |
4b7679a5 | 1341 | rate_control_rate_init(sta); |
f0706e82 | 1342 | |
ddf4ac53 | 1343 | if (elems.wmm_param) |
60f8b39c | 1344 | set_sta_flags(sta, WLAN_STA_WME); |
ddf4ac53 JB |
1345 | |
1346 | if (newsta) { | |
1347 | int err = sta_info_insert(sta); | |
1348 | if (err) { | |
1349 | printk(KERN_DEBUG "%s: failed to insert STA entry for" | |
1350 | " the AP (error %d)\n", sdata->dev->name, err); | |
1351 | rcu_read_unlock(); | |
1352 | return; | |
1353 | } | |
1354 | } | |
1355 | ||
1356 | rcu_read_unlock(); | |
1357 | ||
1358 | if (elems.wmm_param) | |
60f8b39c JB |
1359 | ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param, |
1360 | elems.wmm_param_len); | |
f0706e82 | 1361 | |
ae5eb026 JB |
1362 | if (elems.ht_info_elem && elems.wmm_param && |
1363 | (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) | |
1364 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, | |
1365 | ap_ht_cap_flags); | |
1366 | ||
60f8b39c JB |
1367 | /* set AID and assoc capability, |
1368 | * ieee80211_set_associated() will tell the driver */ | |
1369 | bss_conf->aid = aid; | |
1370 | bss_conf->assoc_capability = capab_info; | |
ae5eb026 | 1371 | ieee80211_set_associated(sdata, ifsta, changed); |
f0706e82 | 1372 | |
60f8b39c | 1373 | ieee80211_associated(sdata, ifsta); |
f0706e82 JB |
1374 | } |
1375 | ||
1376 | ||
f698d856 | 1377 | static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, |
a607268a | 1378 | struct ieee80211_if_sta *ifsta, |
c2b13452 | 1379 | struct ieee80211_bss *bss) |
a607268a | 1380 | { |
f698d856 | 1381 | struct ieee80211_local *local = sdata->local; |
a607268a BR |
1382 | int res, rates, i, j; |
1383 | struct sk_buff *skb; | |
1384 | struct ieee80211_mgmt *mgmt; | |
a607268a | 1385 | u8 *pos; |
a607268a | 1386 | struct ieee80211_supported_band *sband; |
507b06d0 | 1387 | union iwreq_data wrqu; |
a607268a | 1388 | |
e2ef12d3 RR |
1389 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400); |
1390 | if (!skb) { | |
1391 | printk(KERN_DEBUG "%s: failed to allocate buffer for probe " | |
1392 | "response\n", sdata->dev->name); | |
1393 | return -ENOMEM; | |
1394 | } | |
1395 | ||
a607268a BR |
1396 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
1397 | ||
1398 | /* Remove possible STA entries from other IBSS networks. */ | |
dc6676b7 | 1399 | sta_info_flush_delayed(sdata); |
a607268a BR |
1400 | |
1401 | if (local->ops->reset_tsf) { | |
1402 | /* Reset own TSF to allow time synchronization work. */ | |
1403 | local->ops->reset_tsf(local_to_hw(local)); | |
1404 | } | |
1405 | memcpy(ifsta->bssid, bss->bssid, ETH_ALEN); | |
9d139c81 | 1406 | res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID); |
a607268a BR |
1407 | if (res) |
1408 | return res; | |
1409 | ||
1410 | local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10; | |
1411 | ||
a607268a BR |
1412 | sdata->drop_unencrypted = bss->capability & |
1413 | WLAN_CAPABILITY_PRIVACY ? 1 : 0; | |
1414 | ||
f698d856 | 1415 | res = ieee80211_set_freq(sdata, bss->freq); |
a607268a | 1416 | |
be038b37 AK |
1417 | if (res) |
1418 | return res; | |
a607268a | 1419 | |
9d139c81 | 1420 | /* Build IBSS probe response */ |
a607268a | 1421 | |
e2ef12d3 | 1422 | skb_reserve(skb, local->hw.extra_tx_headroom); |
a607268a | 1423 | |
e2ef12d3 RR |
1424 | mgmt = (struct ieee80211_mgmt *) |
1425 | skb_put(skb, 24 + sizeof(mgmt->u.beacon)); | |
1426 | memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon)); | |
1427 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
1428 | IEEE80211_STYPE_PROBE_RESP); | |
1429 | memset(mgmt->da, 0xff, ETH_ALEN); | |
1430 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); | |
1431 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
1432 | mgmt->u.beacon.beacon_int = | |
1433 | cpu_to_le16(local->hw.conf.beacon_int); | |
1434 | mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp); | |
1435 | mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability); | |
a607268a | 1436 | |
e2ef12d3 RR |
1437 | pos = skb_put(skb, 2 + ifsta->ssid_len); |
1438 | *pos++ = WLAN_EID_SSID; | |
1439 | *pos++ = ifsta->ssid_len; | |
1440 | memcpy(pos, ifsta->ssid, ifsta->ssid_len); | |
a607268a | 1441 | |
e2ef12d3 RR |
1442 | rates = bss->supp_rates_len; |
1443 | if (rates > 8) | |
1444 | rates = 8; | |
1445 | pos = skb_put(skb, 2 + rates); | |
1446 | *pos++ = WLAN_EID_SUPP_RATES; | |
1447 | *pos++ = rates; | |
1448 | memcpy(pos, bss->supp_rates, rates); | |
1449 | ||
1450 | if (bss->band == IEEE80211_BAND_2GHZ) { | |
1451 | pos = skb_put(skb, 2 + 1); | |
1452 | *pos++ = WLAN_EID_DS_PARAMS; | |
1453 | *pos++ = 1; | |
1454 | *pos++ = ieee80211_frequency_to_channel(bss->freq); | |
1455 | } | |
a607268a | 1456 | |
e2ef12d3 RR |
1457 | pos = skb_put(skb, 2 + 2); |
1458 | *pos++ = WLAN_EID_IBSS_PARAMS; | |
1459 | *pos++ = 2; | |
1460 | /* FIX: set ATIM window based on scan results */ | |
1461 | *pos++ = 0; | |
1462 | *pos++ = 0; | |
e039fa4a | 1463 | |
e2ef12d3 RR |
1464 | if (bss->supp_rates_len > 8) { |
1465 | rates = bss->supp_rates_len - 8; | |
1466 | pos = skb_put(skb, 2 + rates); | |
1467 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
1468 | *pos++ = rates; | |
1469 | memcpy(pos, &bss->supp_rates[8], rates); | |
9d139c81 | 1470 | } |
a607268a | 1471 | |
e2ef12d3 RR |
1472 | ifsta->probe_resp = skb; |
1473 | ||
1474 | ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON); | |
1475 | ||
1476 | ||
9d139c81 JB |
1477 | rates = 0; |
1478 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1479 | for (i = 0; i < bss->supp_rates_len; i++) { | |
1480 | int bitrate = (bss->supp_rates[i] & 0x7f) * 5; | |
1481 | for (j = 0; j < sband->n_bitrates; j++) | |
1482 | if (sband->bitrates[j].bitrate == bitrate) | |
1483 | rates |= BIT(j); | |
a607268a | 1484 | } |
9d139c81 JB |
1485 | ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates; |
1486 | ||
b079ada7 | 1487 | ieee80211_sta_def_wmm_params(sdata, bss); |
a607268a | 1488 | |
48c2fc59 | 1489 | ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED; |
a607268a BR |
1490 | mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); |
1491 | ||
4492bea6 EG |
1492 | ieee80211_led_assoc(local, true); |
1493 | ||
507b06d0 DW |
1494 | memset(&wrqu, 0, sizeof(wrqu)); |
1495 | memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN); | |
f698d856 | 1496 | wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL); |
a607268a BR |
1497 | |
1498 | return res; | |
1499 | } | |
1500 | ||
98c8fccf JB |
1501 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
1502 | struct ieee80211_mgmt *mgmt, | |
1503 | size_t len, | |
1504 | struct ieee80211_rx_status *rx_status, | |
1505 | struct ieee802_11_elems *elems, | |
1506 | bool beacon) | |
1507 | { | |
1508 | struct ieee80211_local *local = sdata->local; | |
1509 | int freq; | |
c2b13452 | 1510 | struct ieee80211_bss *bss; |
98c8fccf JB |
1511 | struct sta_info *sta; |
1512 | struct ieee80211_channel *channel; | |
1513 | u64 beacon_timestamp, rx_timestamp; | |
1514 | u64 supp_rates = 0; | |
1515 | enum ieee80211_band band = rx_status->band; | |
98c8fccf JB |
1516 | |
1517 | if (elems->ds_params && elems->ds_params_len == 1) | |
1518 | freq = ieee80211_channel_to_frequency(elems->ds_params[0]); | |
1519 | else | |
1520 | freq = rx_status->freq; | |
1521 | ||
1522 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
1523 | ||
1524 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
1525 | return; | |
1526 | ||
05c914fe | 1527 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && elems->supp_rates && |
98c8fccf JB |
1528 | memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) { |
1529 | supp_rates = ieee80211_sta_get_rates(local, elems, band); | |
1530 | ||
1531 | rcu_read_lock(); | |
1532 | ||
1533 | sta = sta_info_get(local, mgmt->sa); | |
1534 | if (sta) { | |
1535 | u64 prev_rates; | |
1536 | ||
323ce79a | 1537 | prev_rates = sta->sta.supp_rates[band]; |
98c8fccf | 1538 | /* make sure mandatory rates are always added */ |
323ce79a | 1539 | sta->sta.supp_rates[band] = supp_rates | |
96dd22ac | 1540 | ieee80211_mandatory_rates(local, band); |
98c8fccf JB |
1541 | |
1542 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
323ce79a | 1543 | if (sta->sta.supp_rates[band] != prev_rates) |
98c8fccf | 1544 | printk(KERN_DEBUG "%s: updated supp_rates set " |
0c68ae26 | 1545 | "for %pM based on beacon info (0x%llx | " |
98c8fccf | 1546 | "0x%llx -> 0x%llx)\n", |
17741cdc | 1547 | sdata->dev->name, |
0c68ae26 | 1548 | sta->sta.addr, |
98c8fccf JB |
1549 | (unsigned long long) prev_rates, |
1550 | (unsigned long long) supp_rates, | |
323ce79a | 1551 | (unsigned long long) sta->sta.supp_rates[band]); |
98c8fccf JB |
1552 | #endif |
1553 | } else { | |
1554 | ieee80211_ibss_add_sta(sdata, NULL, mgmt->bssid, | |
1555 | mgmt->sa, supp_rates); | |
1556 | } | |
1557 | ||
1558 | rcu_read_unlock(); | |
1559 | } | |
1560 | ||
1561 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, | |
1562 | freq, beacon); | |
1563 | if (!bss) | |
1564 | return; | |
1565 | ||
1566 | /* was just updated in ieee80211_bss_info_update */ | |
1567 | beacon_timestamp = bss->timestamp; | |
1568 | ||
30b89b0f JB |
1569 | /* |
1570 | * In STA mode, the remaining parameters should not be overridden | |
1571 | * by beacons because they're not necessarily accurate there. | |
1572 | */ | |
05c914fe | 1573 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC && |
9859b81e | 1574 | bss->last_probe_resp && beacon) { |
3e122be0 | 1575 | ieee80211_rx_bss_put(local, bss); |
30b89b0f JB |
1576 | return; |
1577 | } | |
1578 | ||
9d9bf77d | 1579 | /* check if we need to merge IBSS */ |
05c914fe | 1580 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && beacon && |
fba4a1e6 | 1581 | bss->capability & WLAN_CAPABILITY_IBSS && |
9d9bf77d | 1582 | bss->freq == local->oper_channel->center_freq && |
ae6a44e3 EK |
1583 | elems->ssid_len == sdata->u.sta.ssid_len && |
1584 | memcmp(elems->ssid, sdata->u.sta.ssid, | |
1585 | sdata->u.sta.ssid_len) == 0) { | |
9d9bf77d BR |
1586 | if (rx_status->flag & RX_FLAG_TSFT) { |
1587 | /* in order for correct IBSS merging we need mactime | |
1588 | * | |
1589 | * since mactime is defined as the time the first data | |
1590 | * symbol of the frame hits the PHY, and the timestamp | |
1591 | * of the beacon is defined as "the time that the data | |
1592 | * symbol containing the first bit of the timestamp is | |
1593 | * transmitted to the PHY plus the transmitting STA’s | |
1594 | * delays through its local PHY from the MAC-PHY | |
1595 | * interface to its interface with the WM" | |
1596 | * (802.11 11.1.2) - equals the time this bit arrives at | |
1597 | * the receiver - we have to take into account the | |
1598 | * offset between the two. | |
1599 | * e.g: at 1 MBit that means mactime is 192 usec earlier | |
1600 | * (=24 bytes * 8 usecs/byte) than the beacon timestamp. | |
1601 | */ | |
8e1535d5 | 1602 | int rate = local->hw.wiphy->bands[band]-> |
9d9bf77d BR |
1603 | bitrates[rx_status->rate_idx].bitrate; |
1604 | rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate); | |
1605 | } else if (local && local->ops && local->ops->get_tsf) | |
1606 | /* second best option: get current TSF */ | |
1607 | rx_timestamp = local->ops->get_tsf(local_to_hw(local)); | |
1608 | else | |
1609 | /* can't merge without knowing the TSF */ | |
1610 | rx_timestamp = -1LLU; | |
1611 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0c68ae26 JB |
1612 | printk(KERN_DEBUG "RX beacon SA=%pM BSSID=" |
1613 | "%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n", | |
1614 | mgmt->sa, mgmt->bssid, | |
9d9bf77d BR |
1615 | (unsigned long long)rx_timestamp, |
1616 | (unsigned long long)beacon_timestamp, | |
1617 | (unsigned long long)(rx_timestamp - beacon_timestamp), | |
1618 | jiffies); | |
1619 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
1620 | if (beacon_timestamp > rx_timestamp) { | |
576fdeae | 1621 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
f4ea83dd | 1622 | printk(KERN_DEBUG "%s: beacon TSF higher than " |
0c68ae26 JB |
1623 | "local TSF - IBSS merge with BSSID %pM\n", |
1624 | sdata->dev->name, mgmt->bssid); | |
fba4a1e6 | 1625 | #endif |
f698d856 JBG |
1626 | ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss); |
1627 | ieee80211_ibss_add_sta(sdata, NULL, | |
87291c02 | 1628 | mgmt->bssid, mgmt->sa, |
8e1535d5 | 1629 | supp_rates); |
9d9bf77d BR |
1630 | } |
1631 | } | |
1632 | ||
3e122be0 | 1633 | ieee80211_rx_bss_put(local, bss); |
f0706e82 JB |
1634 | } |
1635 | ||
1636 | ||
f698d856 | 1637 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1638 | struct ieee80211_mgmt *mgmt, |
1639 | size_t len, | |
1640 | struct ieee80211_rx_status *rx_status) | |
1641 | { | |
ae6a44e3 EK |
1642 | size_t baselen; |
1643 | struct ieee802_11_elems elems; | |
9859b81e | 1644 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
ae6a44e3 | 1645 | |
8e7cdbb6 TW |
1646 | if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN)) |
1647 | return; /* ignore ProbeResp to foreign address */ | |
1648 | ||
ae6a44e3 EK |
1649 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
1650 | if (baselen > len) | |
1651 | return; | |
1652 | ||
1653 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
1654 | &elems); | |
1655 | ||
98c8fccf | 1656 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false); |
9859b81e RR |
1657 | |
1658 | /* direct probe may be part of the association flow */ | |
1659 | if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE, | |
1660 | &ifsta->request)) { | |
1661 | printk(KERN_DEBUG "%s direct probe responded\n", | |
1662 | sdata->dev->name); | |
1663 | ieee80211_authenticate(sdata, ifsta); | |
1664 | } | |
f0706e82 JB |
1665 | } |
1666 | ||
1667 | ||
f698d856 | 1668 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1669 | struct ieee80211_mgmt *mgmt, |
1670 | size_t len, | |
1671 | struct ieee80211_rx_status *rx_status) | |
1672 | { | |
f0706e82 | 1673 | struct ieee80211_if_sta *ifsta; |
f0706e82 JB |
1674 | size_t baselen; |
1675 | struct ieee802_11_elems elems; | |
f698d856 | 1676 | struct ieee80211_local *local = sdata->local; |
471b3efd | 1677 | u32 changed = 0; |
7a5158ef JB |
1678 | bool erp_valid; |
1679 | u8 erp_value = 0; | |
f0706e82 | 1680 | |
ae6a44e3 EK |
1681 | /* Process beacon from the current BSS */ |
1682 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
1683 | if (baselen > len) | |
1684 | return; | |
1685 | ||
1686 | ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems); | |
1687 | ||
98c8fccf | 1688 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true); |
f0706e82 | 1689 | |
05c914fe | 1690 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
f0706e82 JB |
1691 | return; |
1692 | ifsta = &sdata->u.sta; | |
1693 | ||
d6f2da5b | 1694 | if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) || |
f0706e82 JB |
1695 | memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) |
1696 | return; | |
1697 | ||
fe3fa827 JB |
1698 | ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param, |
1699 | elems.wmm_param_len); | |
1700 | ||
7a5158ef JB |
1701 | |
1702 | if (elems.erp_info && elems.erp_info_len >= 1) { | |
1703 | erp_valid = true; | |
1704 | erp_value = elems.erp_info[0]; | |
1705 | } else { | |
1706 | erp_valid = false; | |
50c4afb9 | 1707 | } |
7a5158ef JB |
1708 | changed |= ieee80211_handle_bss_capability(sdata, |
1709 | le16_to_cpu(mgmt->u.beacon.capab_info), | |
1710 | erp_valid, erp_value); | |
f0706e82 | 1711 | |
d3c990fb | 1712 | |
ae5eb026 JB |
1713 | if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param) { |
1714 | struct sta_info *sta; | |
1715 | struct ieee80211_supported_band *sband; | |
1716 | u16 ap_ht_cap_flags; | |
1717 | ||
1718 | rcu_read_lock(); | |
1719 | ||
1720 | sta = sta_info_get(local, ifsta->bssid); | |
1721 | if (!sta) { | |
1722 | rcu_read_unlock(); | |
1723 | return; | |
1724 | } | |
1725 | ||
1726 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1727 | ||
1728 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, | |
1729 | elems.ht_cap_elem, &sta->sta.ht_cap); | |
1730 | ||
1731 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
1732 | ||
1733 | rcu_read_unlock(); | |
1734 | ||
1735 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, | |
1736 | ap_ht_cap_flags); | |
d3c990fb RR |
1737 | } |
1738 | ||
471b3efd | 1739 | ieee80211_bss_info_change_notify(sdata, changed); |
f0706e82 JB |
1740 | } |
1741 | ||
1742 | ||
f698d856 | 1743 | static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1744 | struct ieee80211_if_sta *ifsta, |
1745 | struct ieee80211_mgmt *mgmt, | |
1746 | size_t len, | |
1747 | struct ieee80211_rx_status *rx_status) | |
1748 | { | |
f698d856 | 1749 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1750 | int tx_last_beacon; |
1751 | struct sk_buff *skb; | |
1752 | struct ieee80211_mgmt *resp; | |
1753 | u8 *pos, *end; | |
1754 | ||
05c914fe | 1755 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC || |
48c2fc59 | 1756 | ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED || |
f0706e82 JB |
1757 | len < 24 + 2 || !ifsta->probe_resp) |
1758 | return; | |
1759 | ||
1760 | if (local->ops->tx_last_beacon) | |
1761 | tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local)); | |
1762 | else | |
1763 | tx_last_beacon = 1; | |
1764 | ||
1765 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0c68ae26 JB |
1766 | printk(KERN_DEBUG "%s: RX ProbeReq SA=%pM DA=%pM BSSID=%pM" |
1767 | " (tx_last_beacon=%d)\n", | |
1768 | sdata->dev->name, mgmt->sa, mgmt->da, | |
1769 | mgmt->bssid, tx_last_beacon); | |
f0706e82 JB |
1770 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
1771 | ||
1772 | if (!tx_last_beacon) | |
1773 | return; | |
1774 | ||
1775 | if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 && | |
1776 | memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0) | |
1777 | return; | |
1778 | ||
1779 | end = ((u8 *) mgmt) + len; | |
1780 | pos = mgmt->u.probe_req.variable; | |
1781 | if (pos[0] != WLAN_EID_SSID || | |
1782 | pos + 2 + pos[1] > end) { | |
f4ea83dd JB |
1783 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
1784 | printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq " | |
0c68ae26 JB |
1785 | "from %pM\n", |
1786 | sdata->dev->name, mgmt->sa); | |
f4ea83dd | 1787 | #endif |
f0706e82 JB |
1788 | return; |
1789 | } | |
1790 | if (pos[1] != 0 && | |
1791 | (pos[1] != ifsta->ssid_len || | |
1792 | memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) { | |
1793 | /* Ignore ProbeReq for foreign SSID */ | |
1794 | return; | |
1795 | } | |
1796 | ||
1797 | /* Reply with ProbeResp */ | |
0ec0b7ac | 1798 | skb = skb_copy(ifsta->probe_resp, GFP_KERNEL); |
f0706e82 JB |
1799 | if (!skb) |
1800 | return; | |
1801 | ||
1802 | resp = (struct ieee80211_mgmt *) skb->data; | |
1803 | memcpy(resp->da, mgmt->sa, ETH_ALEN); | |
1804 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0c68ae26 JB |
1805 | printk(KERN_DEBUG "%s: Sending ProbeResp to %pM\n", |
1806 | sdata->dev->name, resp->da); | |
f0706e82 | 1807 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
e50db65c | 1808 | ieee80211_tx_skb(sdata, skb, 0); |
f0706e82 JB |
1809 | } |
1810 | ||
f698d856 | 1811 | void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, |
f0706e82 JB |
1812 | struct ieee80211_rx_status *rx_status) |
1813 | { | |
f698d856 | 1814 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1815 | struct ieee80211_if_sta *ifsta; |
1816 | struct ieee80211_mgmt *mgmt; | |
1817 | u16 fc; | |
1818 | ||
1819 | if (skb->len < 24) | |
1820 | goto fail; | |
1821 | ||
f0706e82 JB |
1822 | ifsta = &sdata->u.sta; |
1823 | ||
1824 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1825 | fc = le16_to_cpu(mgmt->frame_control); | |
1826 | ||
1827 | switch (fc & IEEE80211_FCTL_STYPE) { | |
1828 | case IEEE80211_STYPE_PROBE_REQ: | |
1829 | case IEEE80211_STYPE_PROBE_RESP: | |
1830 | case IEEE80211_STYPE_BEACON: | |
1831 | memcpy(skb->cb, rx_status, sizeof(*rx_status)); | |
1832 | case IEEE80211_STYPE_AUTH: | |
1833 | case IEEE80211_STYPE_ASSOC_RESP: | |
1834 | case IEEE80211_STYPE_REASSOC_RESP: | |
1835 | case IEEE80211_STYPE_DEAUTH: | |
1836 | case IEEE80211_STYPE_DISASSOC: | |
1837 | skb_queue_tail(&ifsta->skb_queue, skb); | |
1838 | queue_work(local->hw.workqueue, &ifsta->work); | |
1839 | return; | |
f0706e82 JB |
1840 | } |
1841 | ||
1842 | fail: | |
1843 | kfree_skb(skb); | |
1844 | } | |
1845 | ||
f698d856 | 1846 | static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1847 | struct sk_buff *skb) |
1848 | { | |
1849 | struct ieee80211_rx_status *rx_status; | |
f0706e82 JB |
1850 | struct ieee80211_if_sta *ifsta; |
1851 | struct ieee80211_mgmt *mgmt; | |
1852 | u16 fc; | |
1853 | ||
f0706e82 JB |
1854 | ifsta = &sdata->u.sta; |
1855 | ||
1856 | rx_status = (struct ieee80211_rx_status *) skb->cb; | |
1857 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1858 | fc = le16_to_cpu(mgmt->frame_control); | |
1859 | ||
1860 | switch (fc & IEEE80211_FCTL_STYPE) { | |
1861 | case IEEE80211_STYPE_PROBE_REQ: | |
f698d856 | 1862 | ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len, |
f0706e82 JB |
1863 | rx_status); |
1864 | break; | |
1865 | case IEEE80211_STYPE_PROBE_RESP: | |
f698d856 | 1866 | ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status); |
f0706e82 JB |
1867 | break; |
1868 | case IEEE80211_STYPE_BEACON: | |
f698d856 | 1869 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); |
f0706e82 JB |
1870 | break; |
1871 | case IEEE80211_STYPE_AUTH: | |
f698d856 | 1872 | ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len); |
f0706e82 JB |
1873 | break; |
1874 | case IEEE80211_STYPE_ASSOC_RESP: | |
471b3efd | 1875 | ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0); |
f0706e82 JB |
1876 | break; |
1877 | case IEEE80211_STYPE_REASSOC_RESP: | |
471b3efd | 1878 | ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1); |
f0706e82 JB |
1879 | break; |
1880 | case IEEE80211_STYPE_DEAUTH: | |
f698d856 | 1881 | ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len); |
f0706e82 JB |
1882 | break; |
1883 | case IEEE80211_STYPE_DISASSOC: | |
f698d856 | 1884 | ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len); |
f0706e82 JB |
1885 | break; |
1886 | } | |
1887 | ||
1888 | kfree_skb(skb); | |
1889 | } | |
1890 | ||
1891 | ||
f698d856 | 1892 | static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1893 | { |
f698d856 | 1894 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1895 | int active = 0; |
1896 | struct sta_info *sta; | |
1897 | ||
d0709a65 JB |
1898 | rcu_read_lock(); |
1899 | ||
1900 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
1901 | if (sta->sdata == sdata && | |
f0706e82 JB |
1902 | time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL, |
1903 | jiffies)) { | |
1904 | active++; | |
1905 | break; | |
1906 | } | |
1907 | } | |
d0709a65 JB |
1908 | |
1909 | rcu_read_unlock(); | |
f0706e82 JB |
1910 | |
1911 | return active; | |
1912 | } | |
1913 | ||
1914 | ||
f698d856 | 1915 | static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1916 | struct ieee80211_if_sta *ifsta) |
1917 | { | |
1918 | mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); | |
1919 | ||
f698d856 JBG |
1920 | ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT); |
1921 | if (ieee80211_sta_active_ibss(sdata)) | |
f0706e82 JB |
1922 | return; |
1923 | ||
1924 | printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other " | |
f698d856 | 1925 | "IBSS networks with same SSID (merge)\n", sdata->dev->name); |
c2b13452 | 1926 | ieee80211_request_scan(sdata, ifsta->ssid, ifsta->ssid_len); |
f0706e82 JB |
1927 | } |
1928 | ||
1929 | ||
9c6bd790 | 1930 | static void ieee80211_sta_timer(unsigned long data) |
f0706e82 | 1931 | { |
60f8b39c JB |
1932 | struct ieee80211_sub_if_data *sdata = |
1933 | (struct ieee80211_sub_if_data *) data; | |
1934 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
1935 | struct ieee80211_local *local = sdata->local; | |
f0706e82 | 1936 | |
60f8b39c JB |
1937 | set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); |
1938 | queue_work(local->hw.workqueue, &ifsta->work); | |
f0706e82 JB |
1939 | } |
1940 | ||
f698d856 | 1941 | static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1942 | struct ieee80211_if_sta *ifsta) |
1943 | { | |
f698d856 | 1944 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1945 | |
1946 | if (local->ops->reset_tsf) { | |
1947 | /* Reset own TSF to allow time synchronization work. */ | |
1948 | local->ops->reset_tsf(local_to_hw(local)); | |
1949 | } | |
1950 | ||
1951 | ifsta->wmm_last_param_set = -1; /* allow any WMM update */ | |
1952 | ||
1953 | ||
1954 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
1955 | ifsta->auth_alg = WLAN_AUTH_OPEN; | |
1956 | else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
1957 | ifsta->auth_alg = WLAN_AUTH_SHARED_KEY; | |
1958 | else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
1959 | ifsta->auth_alg = WLAN_AUTH_LEAP; | |
1960 | else | |
1961 | ifsta->auth_alg = WLAN_AUTH_OPEN; | |
f0706e82 | 1962 | ifsta->auth_transaction = -1; |
d6f2da5b | 1963 | ifsta->flags &= ~IEEE80211_STA_ASSOCIATED; |
6042a3e3 | 1964 | ifsta->assoc_scan_tries = 0; |
9859b81e | 1965 | ifsta->direct_probe_tries = 0; |
6042a3e3 RR |
1966 | ifsta->auth_tries = 0; |
1967 | ifsta->assoc_tries = 0; | |
24e64622 | 1968 | netif_tx_stop_all_queues(sdata->dev); |
f698d856 | 1969 | netif_carrier_off(sdata->dev); |
f0706e82 JB |
1970 | } |
1971 | ||
1972 | ||
f0706e82 JB |
1973 | static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta, |
1974 | const char *ssid, int ssid_len) | |
1975 | { | |
1976 | int tmp, hidden_ssid; | |
1977 | ||
48225709 MW |
1978 | if (ssid_len == ifsta->ssid_len && |
1979 | !memcmp(ifsta->ssid, ssid, ssid_len)) | |
f0706e82 JB |
1980 | return 1; |
1981 | ||
d6f2da5b | 1982 | if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) |
f0706e82 JB |
1983 | return 0; |
1984 | ||
1985 | hidden_ssid = 1; | |
1986 | tmp = ssid_len; | |
1987 | while (tmp--) { | |
1988 | if (ssid[tmp] != '\0') { | |
1989 | hidden_ssid = 0; | |
1990 | break; | |
1991 | } | |
1992 | } | |
1993 | ||
1994 | if (hidden_ssid && ifsta->ssid_len == ssid_len) | |
1995 | return 1; | |
1996 | ||
1997 | if (ssid_len == 1 && ssid[0] == ' ') | |
1998 | return 1; | |
1999 | ||
2000 | return 0; | |
2001 | } | |
2002 | ||
f698d856 | 2003 | static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2004 | struct ieee80211_if_sta *ifsta) |
2005 | { | |
f698d856 | 2006 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 2007 | struct ieee80211_bss *bss; |
8318d78a | 2008 | struct ieee80211_supported_band *sband; |
f0706e82 JB |
2009 | u8 bssid[ETH_ALEN], *pos; |
2010 | int i; | |
167ad6f7 | 2011 | int ret; |
f0706e82 JB |
2012 | |
2013 | #if 0 | |
2014 | /* Easier testing, use fixed BSSID. */ | |
2015 | memset(bssid, 0xfe, ETH_ALEN); | |
2016 | #else | |
2017 | /* Generate random, not broadcast, locally administered BSSID. Mix in | |
2018 | * own MAC address to make sure that devices that do not have proper | |
2019 | * random number generator get different BSSID. */ | |
2020 | get_random_bytes(bssid, ETH_ALEN); | |
2021 | for (i = 0; i < ETH_ALEN; i++) | |
f698d856 | 2022 | bssid[i] ^= sdata->dev->dev_addr[i]; |
f0706e82 JB |
2023 | bssid[0] &= ~0x01; |
2024 | bssid[0] |= 0x02; | |
2025 | #endif | |
2026 | ||
0c68ae26 JB |
2027 | printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %pM\n", |
2028 | sdata->dev->name, bssid); | |
f0706e82 | 2029 | |
98c8fccf | 2030 | bss = ieee80211_rx_bss_add(local, bssid, |
8318d78a | 2031 | local->hw.conf.channel->center_freq, |
cffdd30d | 2032 | sdata->u.sta.ssid, sdata->u.sta.ssid_len); |
f0706e82 JB |
2033 | if (!bss) |
2034 | return -ENOMEM; | |
2035 | ||
8318d78a JB |
2036 | bss->band = local->hw.conf.channel->band; |
2037 | sband = local->hw.wiphy->bands[bss->band]; | |
f0706e82 JB |
2038 | |
2039 | if (local->hw.conf.beacon_int == 0) | |
dc0ae30c | 2040 | local->hw.conf.beacon_int = 100; |
f0706e82 | 2041 | bss->beacon_int = local->hw.conf.beacon_int; |
f0706e82 JB |
2042 | bss->last_update = jiffies; |
2043 | bss->capability = WLAN_CAPABILITY_IBSS; | |
988c0f72 JB |
2044 | |
2045 | if (sdata->default_key) | |
f0706e82 | 2046 | bss->capability |= WLAN_CAPABILITY_PRIVACY; |
988c0f72 | 2047 | else |
f0706e82 | 2048 | sdata->drop_unencrypted = 0; |
988c0f72 | 2049 | |
8318d78a | 2050 | bss->supp_rates_len = sband->n_bitrates; |
f0706e82 | 2051 | pos = bss->supp_rates; |
8318d78a JB |
2052 | for (i = 0; i < sband->n_bitrates; i++) { |
2053 | int rate = sband->bitrates[i].bitrate; | |
f0706e82 JB |
2054 | *pos++ = (u8) (rate / 5); |
2055 | } | |
2056 | ||
f698d856 | 2057 | ret = ieee80211_sta_join_ibss(sdata, ifsta, bss); |
3e122be0 | 2058 | ieee80211_rx_bss_put(local, bss); |
167ad6f7 | 2059 | return ret; |
f0706e82 JB |
2060 | } |
2061 | ||
2062 | ||
f698d856 | 2063 | static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2064 | struct ieee80211_if_sta *ifsta) |
2065 | { | |
f698d856 | 2066 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 2067 | struct ieee80211_bss *bss; |
f0706e82 JB |
2068 | int found = 0; |
2069 | u8 bssid[ETH_ALEN]; | |
2070 | int active_ibss; | |
2071 | ||
2072 | if (ifsta->ssid_len == 0) | |
2073 | return -EINVAL; | |
2074 | ||
f698d856 | 2075 | active_ibss = ieee80211_sta_active_ibss(sdata); |
f0706e82 JB |
2076 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
2077 | printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n", | |
f698d856 | 2078 | sdata->dev->name, active_ibss); |
f0706e82 | 2079 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
c2b13452 JB |
2080 | spin_lock_bh(&local->bss_lock); |
2081 | list_for_each_entry(bss, &local->bss_list, list) { | |
f0706e82 JB |
2082 | if (ifsta->ssid_len != bss->ssid_len || |
2083 | memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0 | |
2084 | || !(bss->capability & WLAN_CAPABILITY_IBSS)) | |
2085 | continue; | |
2086 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0c68ae26 | 2087 | printk(KERN_DEBUG " bssid=%pM found\n", bss->bssid); |
f0706e82 JB |
2088 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
2089 | memcpy(bssid, bss->bssid, ETH_ALEN); | |
2090 | found = 1; | |
2091 | if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0) | |
2092 | break; | |
2093 | } | |
c2b13452 | 2094 | spin_unlock_bh(&local->bss_lock); |
f0706e82 JB |
2095 | |
2096 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
6e43829b | 2097 | if (found) |
0c68ae26 JB |
2098 | printk(KERN_DEBUG " sta_find_ibss: selected %pM current " |
2099 | "%pM\n", bssid, ifsta->bssid); | |
f0706e82 | 2100 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
80693ceb DD |
2101 | |
2102 | if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) { | |
167ad6f7 | 2103 | int ret; |
80693ceb DD |
2104 | int search_freq; |
2105 | ||
2106 | if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) | |
2107 | search_freq = bss->freq; | |
2108 | else | |
2109 | search_freq = local->hw.conf.channel->center_freq; | |
2110 | ||
f698d856 | 2111 | bss = ieee80211_rx_bss_get(local, bssid, search_freq, |
80693ceb DD |
2112 | ifsta->ssid, ifsta->ssid_len); |
2113 | if (!bss) | |
2114 | goto dont_join; | |
2115 | ||
0c68ae26 | 2116 | printk(KERN_DEBUG "%s: Selected IBSS BSSID %pM" |
f0706e82 | 2117 | " based on configured SSID\n", |
0c68ae26 | 2118 | sdata->dev->name, bssid); |
f698d856 | 2119 | ret = ieee80211_sta_join_ibss(sdata, ifsta, bss); |
3e122be0 | 2120 | ieee80211_rx_bss_put(local, bss); |
167ad6f7 | 2121 | return ret; |
f0706e82 | 2122 | } |
80693ceb DD |
2123 | |
2124 | dont_join: | |
f0706e82 JB |
2125 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
2126 | printk(KERN_DEBUG " did not try to join ibss\n"); | |
2127 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
2128 | ||
2129 | /* Selected IBSS not found in current scan results - try to scan */ | |
48c2fc59 | 2130 | if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED && |
f698d856 | 2131 | !ieee80211_sta_active_ibss(sdata)) { |
f0706e82 JB |
2132 | mod_timer(&ifsta->timer, jiffies + |
2133 | IEEE80211_IBSS_MERGE_INTERVAL); | |
2134 | } else if (time_after(jiffies, local->last_scan_completed + | |
2135 | IEEE80211_SCAN_INTERVAL)) { | |
2136 | printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to " | |
f698d856 | 2137 | "join\n", sdata->dev->name); |
c2b13452 | 2138 | return ieee80211_request_scan(sdata, ifsta->ssid, |
f0706e82 | 2139 | ifsta->ssid_len); |
48c2fc59 | 2140 | } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) { |
f0706e82 JB |
2141 | int interval = IEEE80211_SCAN_INTERVAL; |
2142 | ||
2143 | if (time_after(jiffies, ifsta->ibss_join_req + | |
2144 | IEEE80211_IBSS_JOIN_TIMEOUT)) { | |
d6f2da5b | 2145 | if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) && |
8318d78a JB |
2146 | (!(local->oper_channel->flags & |
2147 | IEEE80211_CHAN_NO_IBSS))) | |
f698d856 | 2148 | return ieee80211_sta_create_ibss(sdata, ifsta); |
d6f2da5b | 2149 | if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) { |
8318d78a | 2150 | printk(KERN_DEBUG "%s: IBSS not allowed on" |
f698d856 | 2151 | " %d MHz\n", sdata->dev->name, |
8318d78a | 2152 | local->hw.conf.channel->center_freq); |
f0706e82 JB |
2153 | } |
2154 | ||
2155 | /* No IBSS found - decrease scan interval and continue | |
2156 | * scanning. */ | |
2157 | interval = IEEE80211_SCAN_INTERVAL_SLOW; | |
2158 | } | |
2159 | ||
48c2fc59 | 2160 | ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH; |
f0706e82 JB |
2161 | mod_timer(&ifsta->timer, jiffies + interval); |
2162 | return 0; | |
2163 | } | |
2164 | ||
2165 | return 0; | |
2166 | } | |
2167 | ||
2168 | ||
9c6bd790 JB |
2169 | static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata, |
2170 | struct ieee80211_if_sta *ifsta) | |
f0706e82 | 2171 | { |
9c6bd790 | 2172 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 2173 | struct ieee80211_bss *bss, *selected = NULL; |
9c6bd790 | 2174 | int top_rssi = 0, freq; |
f0706e82 | 2175 | |
c2b13452 | 2176 | spin_lock_bh(&local->bss_lock); |
9c6bd790 | 2177 | freq = local->oper_channel->center_freq; |
c2b13452 | 2178 | list_for_each_entry(bss, &local->bss_list, list) { |
9c6bd790 JB |
2179 | if (!(bss->capability & WLAN_CAPABILITY_ESS)) |
2180 | continue; | |
f0706e82 | 2181 | |
9c6bd790 JB |
2182 | if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL | |
2183 | IEEE80211_STA_AUTO_BSSID_SEL | | |
2184 | IEEE80211_STA_AUTO_CHANNEL_SEL)) && | |
2185 | (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^ | |
2186 | !!sdata->default_key)) | |
2187 | continue; | |
f0706e82 | 2188 | |
9c6bd790 JB |
2189 | if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) && |
2190 | bss->freq != freq) | |
2191 | continue; | |
9d139c81 | 2192 | |
9c6bd790 JB |
2193 | if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) && |
2194 | memcmp(bss->bssid, ifsta->bssid, ETH_ALEN)) | |
2195 | continue; | |
f0706e82 | 2196 | |
9c6bd790 JB |
2197 | if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) && |
2198 | !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len)) | |
2199 | continue; | |
9d139c81 | 2200 | |
9c6bd790 JB |
2201 | if (!selected || top_rssi < bss->signal) { |
2202 | selected = bss; | |
2203 | top_rssi = bss->signal; | |
2204 | } | |
f0706e82 | 2205 | } |
9c6bd790 JB |
2206 | if (selected) |
2207 | atomic_inc(&selected->users); | |
c2b13452 | 2208 | spin_unlock_bh(&local->bss_lock); |
9d139c81 | 2209 | |
9c6bd790 JB |
2210 | if (selected) { |
2211 | ieee80211_set_freq(sdata, selected->freq); | |
2212 | if (!(ifsta->flags & IEEE80211_STA_SSID_SET)) | |
2213 | ieee80211_sta_set_ssid(sdata, selected->ssid, | |
2214 | selected->ssid_len); | |
2215 | ieee80211_sta_set_bssid(sdata, selected->bssid); | |
2216 | ieee80211_sta_def_wmm_params(sdata, selected); | |
f0706e82 | 2217 | |
9c6bd790 JB |
2218 | /* Send out direct probe if no probe resp was received or |
2219 | * the one we have is outdated | |
2220 | */ | |
2221 | if (!selected->last_probe_resp || | |
2222 | time_after(jiffies, selected->last_probe_resp | |
2223 | + IEEE80211_SCAN_RESULT_EXPIRE)) | |
2224 | ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE; | |
2225 | else | |
2226 | ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE; | |
f0706e82 | 2227 | |
9c6bd790 JB |
2228 | ieee80211_rx_bss_put(local, selected); |
2229 | ieee80211_sta_reset_auth(sdata, ifsta); | |
2230 | return 0; | |
2231 | } else { | |
2232 | if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) { | |
2233 | ifsta->assoc_scan_tries++; | |
2234 | if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) | |
c2b13452 | 2235 | ieee80211_start_scan(sdata, NULL, 0); |
9c6bd790 | 2236 | else |
c2b13452 | 2237 | ieee80211_start_scan(sdata, ifsta->ssid, |
9c6bd790 JB |
2238 | ifsta->ssid_len); |
2239 | ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE; | |
2240 | set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); | |
2241 | } else | |
2242 | ifsta->state = IEEE80211_STA_MLME_DISABLED; | |
2243 | } | |
2244 | return -1; | |
2245 | } | |
2246 | ||
2247 | ||
2248 | static void ieee80211_sta_work(struct work_struct *work) | |
2249 | { | |
2250 | struct ieee80211_sub_if_data *sdata = | |
2251 | container_of(work, struct ieee80211_sub_if_data, u.sta.work); | |
2252 | struct ieee80211_local *local = sdata->local; | |
2253 | struct ieee80211_if_sta *ifsta; | |
2254 | struct sk_buff *skb; | |
2255 | ||
2256 | if (!netif_running(sdata->dev)) | |
2257 | return; | |
2258 | ||
c2b13452 | 2259 | if (local->sw_scanning || local->hw_scanning) |
9c6bd790 JB |
2260 | return; |
2261 | ||
05c914fe JB |
2262 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION && |
2263 | sdata->vif.type != NL80211_IFTYPE_ADHOC)) | |
9c6bd790 | 2264 | return; |
f0706e82 JB |
2265 | ifsta = &sdata->u.sta; |
2266 | ||
9c6bd790 JB |
2267 | while ((skb = skb_dequeue(&ifsta->skb_queue))) |
2268 | ieee80211_sta_rx_queued_mgmt(sdata, skb); | |
2269 | ||
2270 | if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE && | |
2271 | ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE && | |
2272 | ifsta->state != IEEE80211_STA_MLME_ASSOCIATE && | |
2273 | test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) { | |
c2b13452 JB |
2274 | ieee80211_start_scan(sdata, ifsta->scan_ssid, |
2275 | ifsta->scan_ssid_len); | |
9c6bd790 | 2276 | return; |
f0706e82 JB |
2277 | } |
2278 | ||
9c6bd790 JB |
2279 | if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) { |
2280 | if (ieee80211_sta_config_auth(sdata, ifsta)) | |
2281 | return; | |
2282 | clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); | |
2283 | } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request)) | |
2284 | return; | |
d6f2da5b | 2285 | |
9c6bd790 JB |
2286 | switch (ifsta->state) { |
2287 | case IEEE80211_STA_MLME_DISABLED: | |
2288 | break; | |
2289 | case IEEE80211_STA_MLME_DIRECT_PROBE: | |
2290 | ieee80211_direct_probe(sdata, ifsta); | |
2291 | break; | |
2292 | case IEEE80211_STA_MLME_AUTHENTICATE: | |
2293 | ieee80211_authenticate(sdata, ifsta); | |
2294 | break; | |
2295 | case IEEE80211_STA_MLME_ASSOCIATE: | |
2296 | ieee80211_associate(sdata, ifsta); | |
2297 | break; | |
2298 | case IEEE80211_STA_MLME_ASSOCIATED: | |
2299 | ieee80211_associated(sdata, ifsta); | |
2300 | break; | |
2301 | case IEEE80211_STA_MLME_IBSS_SEARCH: | |
2302 | ieee80211_sta_find_ibss(sdata, ifsta); | |
2303 | break; | |
2304 | case IEEE80211_STA_MLME_IBSS_JOINED: | |
2305 | ieee80211_sta_merge_ibss(sdata, ifsta); | |
2306 | break; | |
2307 | default: | |
2308 | WARN_ON(1); | |
2309 | break; | |
2310 | } | |
2311 | ||
2312 | if (ieee80211_privacy_mismatch(sdata, ifsta)) { | |
2313 | printk(KERN_DEBUG "%s: privacy configuration mismatch and " | |
2314 | "mixed-cell disabled - disassociate\n", sdata->dev->name); | |
2315 | ||
2316 | ieee80211_set_disassoc(sdata, ifsta, false, true, | |
2317 | WLAN_REASON_UNSPECIFIED); | |
2318 | } | |
f0706e82 JB |
2319 | } |
2320 | ||
9c6bd790 JB |
2321 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
2322 | { | |
05c914fe | 2323 | if (sdata->vif.type == NL80211_IFTYPE_STATION) |
9c6bd790 JB |
2324 | queue_work(sdata->local->hw.workqueue, |
2325 | &sdata->u.sta.work); | |
2326 | } | |
f0706e82 | 2327 | |
9c6bd790 JB |
2328 | /* interface setup */ |
2329 | void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) | |
f0706e82 | 2330 | { |
9c6bd790 | 2331 | struct ieee80211_if_sta *ifsta; |
988c0f72 | 2332 | |
9c6bd790 JB |
2333 | ifsta = &sdata->u.sta; |
2334 | INIT_WORK(&ifsta->work, ieee80211_sta_work); | |
2335 | setup_timer(&ifsta->timer, ieee80211_sta_timer, | |
2336 | (unsigned long) sdata); | |
2337 | skb_queue_head_init(&ifsta->skb_queue); | |
2338 | ||
2339 | ifsta->capab = WLAN_CAPABILITY_ESS; | |
2340 | ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN | | |
2341 | IEEE80211_AUTH_ALG_SHARED_KEY; | |
2342 | ifsta->flags |= IEEE80211_STA_CREATE_IBSS | | |
2343 | IEEE80211_STA_AUTO_BSSID_SEL | | |
2344 | IEEE80211_STA_AUTO_CHANNEL_SEL; | |
2345 | if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4) | |
2346 | ifsta->flags |= IEEE80211_STA_WMM_ENABLED; | |
f0706e82 JB |
2347 | } |
2348 | ||
9c6bd790 JB |
2349 | /* |
2350 | * Add a new IBSS station, will also be called by the RX code when, | |
2351 | * in IBSS mode, receiving a frame from a yet-unknown station, hence | |
2352 | * must be callable in atomic context. | |
2353 | */ | |
f698d856 | 2354 | struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, |
988c0f72 | 2355 | struct sk_buff *skb, u8 *bssid, |
87291c02 | 2356 | u8 *addr, u64 supp_rates) |
f0706e82 | 2357 | { |
f698d856 | 2358 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 2359 | struct sta_info *sta; |
87291c02 | 2360 | int band = local->hw.conf.channel->band; |
f0706e82 JB |
2361 | |
2362 | /* TODO: Could consider removing the least recently used entry and | |
2363 | * allow new one to be added. */ | |
2364 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { | |
2365 | if (net_ratelimit()) { | |
2366 | printk(KERN_DEBUG "%s: No room for a new IBSS STA " | |
0c68ae26 | 2367 | "entry %pM\n", sdata->dev->name, addr); |
f0706e82 JB |
2368 | } |
2369 | return NULL; | |
2370 | } | |
2371 | ||
1e188637 | 2372 | if (compare_ether_addr(bssid, sdata->u.sta.bssid)) |
87291c02 VK |
2373 | return NULL; |
2374 | ||
f4ea83dd | 2375 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
0c68ae26 JB |
2376 | printk(KERN_DEBUG "%s: Adding new IBSS station %pM (dev=%s)\n", |
2377 | wiphy_name(local->hw.wiphy), addr, sdata->dev->name); | |
f4ea83dd | 2378 | #endif |
f0706e82 | 2379 | |
73651ee6 JB |
2380 | sta = sta_info_alloc(sdata, addr, GFP_ATOMIC); |
2381 | if (!sta) | |
f0706e82 JB |
2382 | return NULL; |
2383 | ||
07346f81 | 2384 | set_sta_flags(sta, WLAN_STA_AUTHORIZED); |
238814fd | 2385 | |
8e1535d5 | 2386 | /* make sure mandatory rates are always added */ |
323ce79a | 2387 | sta->sta.supp_rates[band] = supp_rates | |
96dd22ac | 2388 | ieee80211_mandatory_rates(local, band); |
f0706e82 | 2389 | |
4b7679a5 | 2390 | rate_control_rate_init(sta); |
f0706e82 | 2391 | |
93e5deb1 | 2392 | if (sta_info_insert(sta)) |
73651ee6 | 2393 | return NULL; |
73651ee6 | 2394 | |
d0709a65 | 2395 | return sta; |
f0706e82 JB |
2396 | } |
2397 | ||
9c6bd790 JB |
2398 | /* configuration hooks */ |
2399 | void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata, | |
2400 | struct ieee80211_if_sta *ifsta) | |
60f8b39c JB |
2401 | { |
2402 | struct ieee80211_local *local = sdata->local; | |
60f8b39c | 2403 | |
05c914fe | 2404 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
9c6bd790 | 2405 | return; |
60f8b39c | 2406 | |
9c6bd790 JB |
2407 | if ((ifsta->flags & (IEEE80211_STA_BSSID_SET | |
2408 | IEEE80211_STA_AUTO_BSSID_SEL)) && | |
2409 | (ifsta->flags & (IEEE80211_STA_SSID_SET | | |
2410 | IEEE80211_STA_AUTO_SSID_SEL))) { | |
60f8b39c | 2411 | |
9c6bd790 JB |
2412 | if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) |
2413 | ieee80211_set_disassoc(sdata, ifsta, true, true, | |
2414 | WLAN_REASON_DEAUTH_LEAVING); | |
60f8b39c | 2415 | |
9c6bd790 JB |
2416 | set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); |
2417 | queue_work(local->hw.workqueue, &ifsta->work); | |
2418 | } | |
2419 | } | |
60f8b39c | 2420 | |
9c6bd790 JB |
2421 | int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len) |
2422 | { | |
2423 | struct ieee80211_if_sta *ifsta; | |
60f8b39c | 2424 | |
9c6bd790 JB |
2425 | if (len > IEEE80211_MAX_SSID_LEN) |
2426 | return -EINVAL; | |
2427 | ||
2428 | ifsta = &sdata->u.sta; | |
2429 | ||
2430 | if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) { | |
2431 | memset(ifsta->ssid, 0, sizeof(ifsta->ssid)); | |
2432 | memcpy(ifsta->ssid, ssid, len); | |
2433 | ifsta->ssid_len = len; | |
2434 | ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET; | |
60f8b39c | 2435 | } |
60f8b39c | 2436 | |
9c6bd790 JB |
2437 | if (len) |
2438 | ifsta->flags |= IEEE80211_STA_SSID_SET; | |
2439 | else | |
2440 | ifsta->flags &= ~IEEE80211_STA_SSID_SET; | |
60f8b39c | 2441 | |
05c914fe | 2442 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && |
9c6bd790 JB |
2443 | !(ifsta->flags & IEEE80211_STA_BSSID_SET)) { |
2444 | ifsta->ibss_join_req = jiffies; | |
2445 | ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH; | |
2446 | return ieee80211_sta_find_ibss(sdata, ifsta); | |
2447 | } | |
2448 | ||
2449 | return 0; | |
2450 | } | |
2451 | ||
2452 | int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len) | |
2453 | { | |
2454 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
2455 | memcpy(ssid, ifsta->ssid, ifsta->ssid_len); | |
2456 | *len = ifsta->ssid_len; | |
2457 | return 0; | |
2458 | } | |
2459 | ||
2460 | int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid) | |
2461 | { | |
2462 | struct ieee80211_if_sta *ifsta; | |
2463 | int res; | |
2464 | ||
2465 | ifsta = &sdata->u.sta; | |
2466 | ||
2467 | if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) { | |
2468 | memcpy(ifsta->bssid, bssid, ETH_ALEN); | |
2469 | res = 0; | |
2470 | /* | |
2471 | * Hack! See also ieee80211_sta_set_ssid. | |
60f8b39c | 2472 | */ |
9c6bd790 JB |
2473 | if (netif_running(sdata->dev)) |
2474 | res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID); | |
2475 | if (res) { | |
2476 | printk(KERN_DEBUG "%s: Failed to config new BSSID to " | |
2477 | "the low-level driver\n", sdata->dev->name); | |
2478 | return res; | |
2479 | } | |
2480 | } | |
60f8b39c | 2481 | |
9c6bd790 JB |
2482 | if (is_valid_ether_addr(bssid)) |
2483 | ifsta->flags |= IEEE80211_STA_BSSID_SET; | |
2484 | else | |
2485 | ifsta->flags &= ~IEEE80211_STA_BSSID_SET; | |
2486 | ||
2487 | return 0; | |
2488 | } | |
2489 | ||
2490 | int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len) | |
2491 | { | |
2492 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
2493 | ||
2494 | kfree(ifsta->extra_ie); | |
2495 | if (len == 0) { | |
2496 | ifsta->extra_ie = NULL; | |
2497 | ifsta->extra_ie_len = 0; | |
60f8b39c | 2498 | return 0; |
60f8b39c | 2499 | } |
9c6bd790 JB |
2500 | ifsta->extra_ie = kmalloc(len, GFP_KERNEL); |
2501 | if (!ifsta->extra_ie) { | |
2502 | ifsta->extra_ie_len = 0; | |
2503 | return -ENOMEM; | |
2504 | } | |
2505 | memcpy(ifsta->extra_ie, ie, len); | |
2506 | ifsta->extra_ie_len = len; | |
2507 | return 0; | |
60f8b39c JB |
2508 | } |
2509 | ||
f698d856 | 2510 | int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 2511 | { |
f0706e82 JB |
2512 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
2513 | ||
f4ea83dd | 2514 | printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n", |
f698d856 | 2515 | sdata->dev->name, reason); |
f0706e82 | 2516 | |
05c914fe JB |
2517 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
2518 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
f0706e82 JB |
2519 | return -EINVAL; |
2520 | ||
aa458d17 | 2521 | ieee80211_set_disassoc(sdata, ifsta, true, true, reason); |
f0706e82 JB |
2522 | return 0; |
2523 | } | |
2524 | ||
f698d856 | 2525 | int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 2526 | { |
f0706e82 JB |
2527 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
2528 | ||
f4ea83dd | 2529 | printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n", |
f698d856 | 2530 | sdata->dev->name, reason); |
f0706e82 | 2531 | |
05c914fe | 2532 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
f0706e82 JB |
2533 | return -EINVAL; |
2534 | ||
d6f2da5b | 2535 | if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED)) |
f0706e82 JB |
2536 | return -1; |
2537 | ||
aa458d17 | 2538 | ieee80211_set_disassoc(sdata, ifsta, false, true, reason); |
f0706e82 JB |
2539 | return 0; |
2540 | } | |
84363e6e | 2541 | |
9c6bd790 JB |
2542 | /* scan finished notification */ |
2543 | void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) | |
2544 | { | |
2545 | struct ieee80211_sub_if_data *sdata = local->scan_sdata; | |
2546 | struct ieee80211_if_sta *ifsta; | |
2547 | ||
05c914fe | 2548 | if (sdata && sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
9c6bd790 JB |
2549 | ifsta = &sdata->u.sta; |
2550 | if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) || | |
2551 | (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) && | |
2552 | !ieee80211_sta_active_ibss(sdata))) | |
2553 | ieee80211_sta_find_ibss(sdata, ifsta); | |
2554 | } | |
2555 | ||
2556 | /* Restart STA timers */ | |
2557 | rcu_read_lock(); | |
2558 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
2559 | ieee80211_restart_sta_timer(sdata); | |
2560 | rcu_read_unlock(); | |
2561 | } |