blob: ec400479c5f611b32e723087e80e4f7589a72f23 [file] [log] [blame]
Jiri Bencf0706e82007-05-05 11:45:53 -07001/*
2 * BSS client mode implementation
Jouni Malinen5394af42009-01-08 13:31:59 +02003 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
Jiri Bencf0706e82007-05-05 11:45:53 -07004 * 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
Geert Uytterhoeven5b323ed2007-05-08 18:40:27 -070014#include <linux/delay.h>
Jiri Bencf0706e82007-05-05 11:45:53 -070015#include <linux/if_ether.h>
16#include <linux/skbuff.h>
Jiri Bencf0706e82007-05-05 11:45:53 -070017#include <linux/if_arp.h>
18#include <linux/wireless.h>
19#include <linux/random.h>
20#include <linux/etherdevice.h>
Johannes Bergd0709a62008-02-25 16:27:46 +010021#include <linux/rtnetlink.h>
Jiri Bencf0706e82007-05-05 11:45:53 -070022#include <net/iw_handler.h>
Jiri Bencf0706e82007-05-05 11:45:53 -070023#include <net/mac80211.h>
Johannes Berg472dbc42008-09-11 00:01:49 +020024#include <asm/unaligned.h>
Johannes Berg60f8b392008-09-08 17:44:22 +020025
Jiri Bencf0706e82007-05-05 11:45:53 -070026#include "ieee80211_i.h"
Johannes Berg2c8dccc2008-04-08 15:14:40 -040027#include "rate.h"
28#include "led.h"
Jiri Bencf0706e82007-05-05 11:45:53 -070029
Ron Rindjunsky6042a3e2008-08-08 01:50:46 +030030#define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
Jiri Bencf0706e82007-05-05 11:45:53 -070031#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)
Dan Williams872ba532008-06-04 13:59:34 -040040#define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
Jiri Bencf0706e82007-05-05 11:45:53 -070041
Jiri Bencf0706e82007-05-05 11:45:53 -070042#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
Johannes Berg5484e232008-09-08 17:44:27 +020048/* utils */
49static int ecw2cw(int ecw)
Johannes Berg60f8b392008-09-08 17:44:22 +020050{
Johannes Berg5484e232008-09-08 17:44:27 +020051 return (1 << ecw) - 1;
Johannes Berg60f8b392008-09-08 17:44:22 +020052}
53
Johannes Bergc2b13452008-09-11 00:01:55 +020054static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
Jouni Malinen43ac2ca2008-08-15 22:21:27 +030055{
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
Johannes Bergc2b13452008-09-11 00:01:55 +020074static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
Johannes Berg9ac19a92008-09-09 10:57:09 +020075 struct ieee80211_supported_band *sband,
Johannes Berg881d9482009-01-21 15:13:48 +010076 u32 *rates)
Johannes Berg9ac19a92008-09-09 10:57:09 +020077{
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
Johannes Berg9c6bd792008-09-11 00:01:52 +020095/* also used by mesh code */
Johannes Berg881d9482009-01-21 15:13:48 +010096u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
Johannes Berg9c6bd792008-09-11 00:01:52 +020097 struct ieee802_11_elems *elems,
98 enum ieee80211_band band)
Johannes Berg60f8b392008-09-08 17:44:22 +020099{
Johannes Berg9c6bd792008-09-11 00:01:52 +0200100 struct ieee80211_supported_band *sband;
101 struct ieee80211_rate *bitrates;
102 size_t num_rates;
Johannes Berg881d9482009-01-21 15:13:48 +0100103 u32 supp_rates;
Johannes Berg9c6bd792008-09-11 00:01:52 +0200104 int i, j;
105 sband = local->hw.wiphy->bands[band];
Johannes Berg60f8b392008-09-08 17:44:22 +0200106
Johannes Berg9c6bd792008-09-11 00:01:52 +0200107 if (!sband) {
108 WARN_ON(1);
109 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
Johannes Berg60f8b392008-09-08 17:44:22 +0200110 }
Johannes Berg60f8b392008-09-08 17:44:22 +0200111
Johannes Berg9c6bd792008-09-11 00:01:52 +0200112 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;
Johannes Berg60f8b392008-09-08 17:44:22 +0200130}
131
Johannes Berg9c6bd792008-09-11 00:01:52 +0200132/* frame sending functions */
133
Jouni Malinen9aed3cc2009-01-13 16:03:29 +0200134static void add_extra_ies(struct sk_buff *skb, u8 *ies, size_t ies_len)
135{
136 if (ies)
137 memcpy(skb_put(skb, ies_len), ies, ies_len);
138}
139
Johannes Berg9c6bd792008-09-11 00:01:52 +0200140/* also used by scanning code */
Johannes Berg0a51b272008-09-08 17:44:25 +0200141void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
142 u8 *ssid, size_t ssid_len)
Johannes Berg60f8b392008-09-08 17:44:22 +0200143{
144 struct ieee80211_local *local = sdata->local;
145 struct ieee80211_supported_band *sband;
146 struct sk_buff *skb;
147 struct ieee80211_mgmt *mgmt;
148 u8 *pos, *supp_rates, *esupp_rates = NULL;
149 int i;
150
Jouni Malinen9aed3cc2009-01-13 16:03:29 +0200151 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200 +
152 sdata->u.sta.ie_probereq_len);
Johannes Berg60f8b392008-09-08 17:44:22 +0200153 if (!skb) {
154 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
155 "request\n", sdata->dev->name);
156 return;
157 }
158 skb_reserve(skb, local->hw.extra_tx_headroom);
159
160 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
161 memset(mgmt, 0, 24);
162 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
163 IEEE80211_STYPE_PROBE_REQ);
164 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
165 if (dst) {
166 memcpy(mgmt->da, dst, ETH_ALEN);
167 memcpy(mgmt->bssid, dst, ETH_ALEN);
168 } else {
169 memset(mgmt->da, 0xff, ETH_ALEN);
170 memset(mgmt->bssid, 0xff, ETH_ALEN);
171 }
172 pos = skb_put(skb, 2 + ssid_len);
173 *pos++ = WLAN_EID_SSID;
174 *pos++ = ssid_len;
175 memcpy(pos, ssid, ssid_len);
176
177 supp_rates = skb_put(skb, 2);
178 supp_rates[0] = WLAN_EID_SUPP_RATES;
179 supp_rates[1] = 0;
180 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
181
182 for (i = 0; i < sband->n_bitrates; i++) {
183 struct ieee80211_rate *rate = &sband->bitrates[i];
184 if (esupp_rates) {
185 pos = skb_put(skb, 1);
186 esupp_rates[1]++;
187 } else if (supp_rates[1] == 8) {
188 esupp_rates = skb_put(skb, 3);
189 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
190 esupp_rates[1] = 1;
191 pos = &esupp_rates[2];
192 } else {
193 pos = skb_put(skb, 1);
194 supp_rates[1]++;
195 }
196 *pos = rate->bitrate / 5;
197 }
198
Jouni Malinen9aed3cc2009-01-13 16:03:29 +0200199 add_extra_ies(skb, sdata->u.sta.ie_probereq,
200 sdata->u.sta.ie_probereq_len);
201
Johannes Berge50db652008-09-09 15:07:09 +0200202 ieee80211_tx_skb(sdata, skb, 0);
Johannes Berg60f8b392008-09-08 17:44:22 +0200203}
204
Johannes Berg9c6bd792008-09-11 00:01:52 +0200205static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
206 struct ieee80211_if_sta *ifsta,
207 int transaction, u8 *extra, size_t extra_len,
208 int encrypt)
209{
210 struct ieee80211_local *local = sdata->local;
211 struct sk_buff *skb;
212 struct ieee80211_mgmt *mgmt;
213
214 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
Jouni Malinen9aed3cc2009-01-13 16:03:29 +0200215 sizeof(*mgmt) + 6 + extra_len +
216 sdata->u.sta.ie_auth_len);
Johannes Berg9c6bd792008-09-11 00:01:52 +0200217 if (!skb) {
218 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
219 "frame\n", sdata->dev->name);
220 return;
221 }
222 skb_reserve(skb, local->hw.extra_tx_headroom);
223
224 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
225 memset(mgmt, 0, 24 + 6);
226 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
227 IEEE80211_STYPE_AUTH);
228 if (encrypt)
229 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
230 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
231 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
232 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
233 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
234 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
235 ifsta->auth_transaction = transaction + 1;
236 mgmt->u.auth.status_code = cpu_to_le16(0);
237 if (extra)
238 memcpy(skb_put(skb, extra_len), extra, extra_len);
Jouni Malinen9aed3cc2009-01-13 16:03:29 +0200239 add_extra_ies(skb, sdata->u.sta.ie_auth, sdata->u.sta.ie_auth_len);
Johannes Berg9c6bd792008-09-11 00:01:52 +0200240
241 ieee80211_tx_skb(sdata, skb, encrypt);
242}
243
Johannes Berg9ac19a92008-09-09 10:57:09 +0200244static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
245 struct ieee80211_if_sta *ifsta)
246{
247 struct ieee80211_local *local = sdata->local;
248 struct sk_buff *skb;
249 struct ieee80211_mgmt *mgmt;
Jouni Malinen9aed3cc2009-01-13 16:03:29 +0200250 u8 *pos, *ies, *ht_ie, *e_ies;
Johannes Berg9ac19a92008-09-09 10:57:09 +0200251 int i, len, count, rates_len, supp_rates_len;
252 u16 capab;
Johannes Bergc2b13452008-09-11 00:01:55 +0200253 struct ieee80211_bss *bss;
Johannes Berg9ac19a92008-09-09 10:57:09 +0200254 int wmm = 0;
255 struct ieee80211_supported_band *sband;
Johannes Berg881d9482009-01-21 15:13:48 +0100256 u32 rates = 0;
Jouni Malinen9aed3cc2009-01-13 16:03:29 +0200257 size_t e_ies_len;
258
259 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
260 e_ies = sdata->u.sta.ie_reassocreq;
261 e_ies_len = sdata->u.sta.ie_reassocreq_len;
262 } else {
263 e_ies = sdata->u.sta.ie_assocreq;
264 e_ies_len = sdata->u.sta.ie_assocreq_len;
265 }
Johannes Berg9ac19a92008-09-09 10:57:09 +0200266
267 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
268 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
Jouni Malinen9aed3cc2009-01-13 16:03:29 +0200269 ifsta->ssid_len + e_ies_len);
Johannes Berg9ac19a92008-09-09 10:57:09 +0200270 if (!skb) {
271 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
272 "frame\n", sdata->dev->name);
273 return;
274 }
275 skb_reserve(skb, local->hw.extra_tx_headroom);
276
277 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
278
279 capab = ifsta->capab;
280
281 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
282 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
283 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
284 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
285 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
286 }
287
288 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
289 local->hw.conf.channel->center_freq,
290 ifsta->ssid, ifsta->ssid_len);
291 if (bss) {
292 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
293 capab |= WLAN_CAPABILITY_PRIVACY;
294 if (bss->wmm_used)
295 wmm = 1;
296
297 /* get all rates supported by the device and the AP as
298 * some APs don't like getting a superset of their rates
299 * in the association request (e.g. D-Link DAP 1353 in
300 * b-only mode) */
301 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
302
303 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
304 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
305 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
306
307 ieee80211_rx_bss_put(local, bss);
308 } else {
309 rates = ~0;
310 rates_len = sband->n_bitrates;
311 }
312
313 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
314 memset(mgmt, 0, 24);
315 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
316 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
317 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
318
319 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
320 skb_put(skb, 10);
321 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
322 IEEE80211_STYPE_REASSOC_REQ);
323 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
324 mgmt->u.reassoc_req.listen_interval =
325 cpu_to_le16(local->hw.conf.listen_interval);
326 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
327 ETH_ALEN);
328 } else {
329 skb_put(skb, 4);
330 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
331 IEEE80211_STYPE_ASSOC_REQ);
332 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
Rami Rosen13554122008-12-16 22:38:29 +0200333 mgmt->u.assoc_req.listen_interval =
Johannes Berg9ac19a92008-09-09 10:57:09 +0200334 cpu_to_le16(local->hw.conf.listen_interval);
335 }
336
337 /* SSID */
338 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
339 *pos++ = WLAN_EID_SSID;
340 *pos++ = ifsta->ssid_len;
341 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
342
343 /* add all rates which were marked to be used above */
344 supp_rates_len = rates_len;
345 if (supp_rates_len > 8)
346 supp_rates_len = 8;
347
348 len = sband->n_bitrates;
349 pos = skb_put(skb, supp_rates_len + 2);
350 *pos++ = WLAN_EID_SUPP_RATES;
351 *pos++ = supp_rates_len;
352
353 count = 0;
354 for (i = 0; i < sband->n_bitrates; i++) {
355 if (BIT(i) & rates) {
356 int rate = sband->bitrates[i].bitrate;
357 *pos++ = (u8) (rate / 5);
358 if (++count == 8)
359 break;
360 }
361 }
362
363 if (rates_len > count) {
364 pos = skb_put(skb, rates_len - count + 2);
365 *pos++ = WLAN_EID_EXT_SUPP_RATES;
366 *pos++ = rates_len - count;
367
368 for (i++; i < sband->n_bitrates; i++) {
369 if (BIT(i) & rates) {
370 int rate = sband->bitrates[i].bitrate;
371 *pos++ = (u8) (rate / 5);
372 }
373 }
374 }
375
376 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
377 /* 1. power capabilities */
378 pos = skb_put(skb, 4);
379 *pos++ = WLAN_EID_PWR_CAPABILITY;
380 *pos++ = 2;
381 *pos++ = 0; /* min tx power */
382 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
383
384 /* 2. supported channels */
385 /* TODO: get this in reg domain format */
386 pos = skb_put(skb, 2 * sband->n_channels + 2);
387 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
388 *pos++ = 2 * sband->n_channels;
389 for (i = 0; i < sband->n_channels; i++) {
390 *pos++ = ieee80211_frequency_to_channel(
391 sband->channels[i].center_freq);
392 *pos++ = 1; /* one channel in the subband*/
393 }
394 }
395
396 if (ifsta->extra_ie) {
397 pos = skb_put(skb, ifsta->extra_ie_len);
398 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
399 }
400
401 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
402 pos = skb_put(skb, 9);
403 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
404 *pos++ = 7; /* len */
405 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
406 *pos++ = 0x50;
407 *pos++ = 0xf2;
408 *pos++ = 2; /* WME */
409 *pos++ = 0; /* WME info */
410 *pos++ = 1; /* WME ver */
411 *pos++ = 0;
412 }
413
414 /* wmm support is a must to HT */
Vasanthakumar Thiagarajaneb469362008-12-23 21:30:50 +0530415 /*
416 * IEEE802.11n does not allow TKIP/WEP as pairwise
417 * ciphers in HT mode. We still associate in non-ht
418 * mode (11a/b/g) if any one of these ciphers is
419 * configured as pairwise.
420 */
Johannes Berg9ac19a92008-09-09 10:57:09 +0200421 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200422 sband->ht_cap.ht_supported &&
423 (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) &&
Vasanthakumar Thiagarajaneb469362008-12-23 21:30:50 +0530424 ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
425 (!(ifsta->flags & IEEE80211_STA_TKIP_WEP_USED))) {
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200426 struct ieee80211_ht_info *ht_info =
427 (struct ieee80211_ht_info *)(ht_ie + 2);
428 u16 cap = sband->ht_cap.cap;
Johannes Berg9ac19a92008-09-09 10:57:09 +0200429 __le16 tmp;
430 u32 flags = local->hw.conf.channel->flags;
431
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200432 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
433 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
Johannes Berg9ac19a92008-09-09 10:57:09 +0200434 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200435 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
Johannes Berg9ac19a92008-09-09 10:57:09 +0200436 cap &= ~IEEE80211_HT_CAP_SGI_40;
437 }
438 break;
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200439 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
Johannes Berg9ac19a92008-09-09 10:57:09 +0200440 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200441 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
Johannes Berg9ac19a92008-09-09 10:57:09 +0200442 cap &= ~IEEE80211_HT_CAP_SGI_40;
443 }
444 break;
445 }
446
447 tmp = cpu_to_le16(cap);
448 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
449 *pos++ = WLAN_EID_HT_CAPABILITY;
450 *pos++ = sizeof(struct ieee80211_ht_cap);
451 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
452 memcpy(pos, &tmp, sizeof(u16));
453 pos += sizeof(u16);
454 /* TODO: needs a define here for << 2 */
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200455 *pos++ = sband->ht_cap.ampdu_factor |
456 (sband->ht_cap.ampdu_density << 2);
457 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
Johannes Berg9ac19a92008-09-09 10:57:09 +0200458 }
459
Jouni Malinen9aed3cc2009-01-13 16:03:29 +0200460 add_extra_ies(skb, e_ies, e_ies_len);
461
Johannes Berg9ac19a92008-09-09 10:57:09 +0200462 kfree(ifsta->assocreq_ies);
463 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
464 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
465 if (ifsta->assocreq_ies)
466 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
467
Johannes Berge50db652008-09-09 15:07:09 +0200468 ieee80211_tx_skb(sdata, skb, 0);
Johannes Berg9ac19a92008-09-09 10:57:09 +0200469}
470
471
Johannes Bergef422bc2008-09-09 10:58:25 +0200472static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
473 u16 stype, u16 reason)
Johannes Berg9ac19a92008-09-09 10:57:09 +0200474{
475 struct ieee80211_local *local = sdata->local;
Johannes Bergef422bc2008-09-09 10:58:25 +0200476 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
Johannes Berg9ac19a92008-09-09 10:57:09 +0200477 struct sk_buff *skb;
478 struct ieee80211_mgmt *mgmt;
Jouni Malinen9aed3cc2009-01-13 16:03:29 +0200479 u8 *ies;
480 size_t ies_len;
Johannes Berg9ac19a92008-09-09 10:57:09 +0200481
Jouni Malinen9aed3cc2009-01-13 16:03:29 +0200482 if (stype == IEEE80211_STYPE_DEAUTH) {
483 ies = sdata->u.sta.ie_deauth;
484 ies_len = sdata->u.sta.ie_deauth_len;
485 } else {
486 ies = sdata->u.sta.ie_disassoc;
487 ies_len = sdata->u.sta.ie_disassoc_len;
488 }
489
490 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) +
491 ies_len);
Johannes Berg9ac19a92008-09-09 10:57:09 +0200492 if (!skb) {
Johannes Bergef422bc2008-09-09 10:58:25 +0200493 printk(KERN_DEBUG "%s: failed to allocate buffer for "
494 "deauth/disassoc frame\n", sdata->dev->name);
Johannes Berg9ac19a92008-09-09 10:57:09 +0200495 return;
496 }
497 skb_reserve(skb, local->hw.extra_tx_headroom);
498
499 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
500 memset(mgmt, 0, 24);
501 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
502 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
503 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
Johannes Bergef422bc2008-09-09 10:58:25 +0200504 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
Johannes Berg9ac19a92008-09-09 10:57:09 +0200505 skb_put(skb, 2);
Johannes Bergef422bc2008-09-09 10:58:25 +0200506 /* u.deauth.reason_code == u.disassoc.reason_code */
Johannes Berg9ac19a92008-09-09 10:57:09 +0200507 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
508
Jouni Malinen9aed3cc2009-01-13 16:03:29 +0200509 add_extra_ies(skb, ies, ies_len);
510
Jouni Malinen5394af42009-01-08 13:31:59 +0200511 ieee80211_tx_skb(sdata, skb, ifsta->flags & IEEE80211_STA_MFP_ENABLED);
Johannes Berg9ac19a92008-09-09 10:57:09 +0200512}
513
Johannes Berg60f8b392008-09-08 17:44:22 +0200514/* MLME */
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200515static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
Johannes Bergc2b13452008-09-11 00:01:55 +0200516 struct ieee80211_bss *bss)
Vladimir Koutnye2839d82008-03-18 21:14:07 +0100517{
Vladimir Koutnye2839d82008-03-18 21:14:07 +0100518 struct ieee80211_local *local = sdata->local;
519 int i, have_higher_than_11mbit = 0;
520
Vladimir Koutnye2839d82008-03-18 21:14:07 +0100521 /* cf. IEEE 802.11 9.2.12 */
522 for (i = 0; i < bss->supp_rates_len; i++)
523 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
524 have_higher_than_11mbit = 1;
525
526 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
527 have_higher_than_11mbit)
528 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
529 else
530 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
531
Johannes Berg3d35f7c2008-09-09 12:54:11 +0200532 ieee80211_set_wmm_default(sdata);
Vladimir Koutnye2839d82008-03-18 21:14:07 +0100533}
534
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200535static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
Jiri Bencf0706e82007-05-05 11:45:53 -0700536 struct ieee80211_if_sta *ifsta,
537 u8 *wmm_param, size_t wmm_param_len)
538{
Jiri Bencf0706e82007-05-05 11:45:53 -0700539 struct ieee80211_tx_queue_params params;
540 size_t left;
541 int count;
542 u8 *pos;
543
Johannes Berg3434fbd2008-05-03 00:59:37 +0200544 if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
545 return;
546
547 if (!wmm_param)
548 return;
549
Jiri Bencf0706e82007-05-05 11:45:53 -0700550 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
551 return;
552 count = wmm_param[6] & 0x0f;
553 if (count == ifsta->wmm_last_param_set)
554 return;
555 ifsta->wmm_last_param_set = count;
556
557 pos = wmm_param + 8;
558 left = wmm_param_len - 8;
559
560 memset(&params, 0, sizeof(params));
561
562 if (!local->ops->conf_tx)
563 return;
564
565 local->wmm_acm = 0;
566 for (; left >= 4; left -= 4, pos += 4) {
567 int aci = (pos[0] >> 5) & 0x03;
568 int acm = (pos[0] >> 4) & 0x01;
569 int queue;
570
571 switch (aci) {
572 case 1:
Johannes Berge100bb62008-04-30 18:51:21 +0200573 queue = 3;
Johannes Berg988c0f72008-04-17 19:21:22 +0200574 if (acm)
Jiri Bencf0706e82007-05-05 11:45:53 -0700575 local->wmm_acm |= BIT(0) | BIT(3);
Jiri Bencf0706e82007-05-05 11:45:53 -0700576 break;
577 case 2:
Johannes Berge100bb62008-04-30 18:51:21 +0200578 queue = 1;
Johannes Berg988c0f72008-04-17 19:21:22 +0200579 if (acm)
Jiri Bencf0706e82007-05-05 11:45:53 -0700580 local->wmm_acm |= BIT(4) | BIT(5);
Jiri Bencf0706e82007-05-05 11:45:53 -0700581 break;
582 case 3:
Johannes Berge100bb62008-04-30 18:51:21 +0200583 queue = 0;
Johannes Berg988c0f72008-04-17 19:21:22 +0200584 if (acm)
Jiri Bencf0706e82007-05-05 11:45:53 -0700585 local->wmm_acm |= BIT(6) | BIT(7);
Jiri Bencf0706e82007-05-05 11:45:53 -0700586 break;
587 case 0:
588 default:
Johannes Berge100bb62008-04-30 18:51:21 +0200589 queue = 2;
Johannes Berg988c0f72008-04-17 19:21:22 +0200590 if (acm)
Jiri Bencf0706e82007-05-05 11:45:53 -0700591 local->wmm_acm |= BIT(1) | BIT(2);
Jiri Bencf0706e82007-05-05 11:45:53 -0700592 break;
593 }
594
595 params.aifs = pos[0] & 0x0f;
596 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
597 params.cw_min = ecw2cw(pos[1] & 0x0f);
Johannes Bergf434b2d2008-07-10 11:22:31 +0200598 params.txop = get_unaligned_le16(pos + 2);
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200599#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Jiri Bencf0706e82007-05-05 11:45:53 -0700600 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
Johannes Berg3330d7b2008-02-10 16:49:38 +0100601 "cWmin=%d cWmax=%d txop=%d\n",
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200602 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
Johannes Berg3330d7b2008-02-10 16:49:38 +0100603 params.cw_max, params.txop);
604#endif
Jiri Bencf0706e82007-05-05 11:45:53 -0700605 /* TODO: handle ACM (block TX, fallback to next lowest allowed
606 * AC for now) */
607 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
608 printk(KERN_DEBUG "%s: failed to set TX queue "
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200609 "parameters for queue %d\n", local->mdev->name, queue);
Jiri Bencf0706e82007-05-05 11:45:53 -0700610 }
611 }
612}
613
Vivek Natarajana97b77b2008-12-23 18:39:02 -0800614static bool check_tim(struct ieee802_11_elems *elems, u16 aid, bool *is_mc)
615{
616 u8 mask;
617 u8 index, indexn1, indexn2;
618 struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *) elems->tim;
619
620 aid &= 0x3fff;
621 index = aid / 8;
622 mask = 1 << (aid & 7);
623
624 if (tim->bitmap_ctrl & 0x01)
625 *is_mc = true;
626
627 indexn1 = tim->bitmap_ctrl & 0xfe;
628 indexn2 = elems->tim_len + indexn1 - 4;
629
630 if (index < indexn1 || index > indexn2)
631 return false;
632
633 index -= indexn1;
634
635 return !!(tim->virtual_map[index] & mask);
636}
637
Johannes Berg7a5158e2008-10-08 10:59:33 +0200638static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
639 u16 capab, bool erp_valid, u8 erp)
Daniel Drake56282212007-07-10 19:32:10 +0200640{
Johannes Bergbda39332008-10-11 01:51:51 +0200641 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
Tomas Winklerebd74482008-07-01 10:44:50 +0300642#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Daniel Drake56282212007-07-10 19:32:10 +0200643 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
Tomas Winklerebd74482008-07-01 10:44:50 +0300644#endif
Johannes Berg471b3ef2007-12-28 14:32:58 +0100645 u32 changed = 0;
Johannes Berg7a5158e2008-10-08 10:59:33 +0200646 bool use_protection;
647 bool use_short_preamble;
648 bool use_short_slot;
649
650 if (erp_valid) {
651 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
652 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
653 } else {
654 use_protection = false;
655 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
656 }
657
658 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
Daniel Drake56282212007-07-10 19:32:10 +0200659
Johannes Berg471b3ef2007-12-28 14:32:58 +0100660 if (use_protection != bss_conf->use_cts_prot) {
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200661#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Daniel Drake56282212007-07-10 19:32:10 +0200662 if (net_ratelimit()) {
Johannes Berg0c68ae262008-10-27 15:56:10 -0700663 printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
Johannes Berg471b3ef2007-12-28 14:32:58 +0100664 sdata->dev->name,
Daniel Drake56282212007-07-10 19:32:10 +0200665 use_protection ? "enabled" : "disabled",
Johannes Berg0c68ae262008-10-27 15:56:10 -0700666 ifsta->bssid);
Daniel Drake56282212007-07-10 19:32:10 +0200667 }
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200668#endif
Johannes Berg471b3ef2007-12-28 14:32:58 +0100669 bss_conf->use_cts_prot = use_protection;
670 changed |= BSS_CHANGED_ERP_CTS_PROT;
Daniel Drake56282212007-07-10 19:32:10 +0200671 }
Daniel Drake7e9ed182007-07-27 15:43:24 +0200672
Vladimir Koutnyd43c7b32008-03-31 17:05:03 +0200673 if (use_short_preamble != bss_conf->use_short_preamble) {
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200674#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Daniel Drake7e9ed182007-07-27 15:43:24 +0200675 if (net_ratelimit()) {
676 printk(KERN_DEBUG "%s: switched to %s barker preamble"
Johannes Berg0c68ae262008-10-27 15:56:10 -0700677 " (BSSID=%pM)\n",
Johannes Berg471b3ef2007-12-28 14:32:58 +0100678 sdata->dev->name,
Vladimir Koutnyd43c7b32008-03-31 17:05:03 +0200679 use_short_preamble ? "short" : "long",
Johannes Berg0c68ae262008-10-27 15:56:10 -0700680 ifsta->bssid);
Daniel Drake7e9ed182007-07-27 15:43:24 +0200681 }
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200682#endif
Vladimir Koutnyd43c7b32008-03-31 17:05:03 +0200683 bss_conf->use_short_preamble = use_short_preamble;
Johannes Berg471b3ef2007-12-28 14:32:58 +0100684 changed |= BSS_CHANGED_ERP_PREAMBLE;
Daniel Drake7e9ed182007-07-27 15:43:24 +0200685 }
Daniel Draked9430a32007-07-27 15:43:24 +0200686
Johannes Berg7a5158e2008-10-08 10:59:33 +0200687 if (use_short_slot != bss_conf->use_short_slot) {
688#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
689 if (net_ratelimit()) {
Christian Lamparter391429c2009-01-18 02:24:15 +0100690 printk(KERN_DEBUG "%s: switched to %s slot time"
691 " (BSSID=%pM)\n",
Johannes Berg7a5158e2008-10-08 10:59:33 +0200692 sdata->dev->name,
693 use_short_slot ? "short" : "long",
694 ifsta->bssid);
695 }
696#endif
697 bss_conf->use_short_slot = use_short_slot;
698 changed |= BSS_CHANGED_ERP_SLOT;
John W. Linville50c4afb2008-04-15 14:09:27 -0400699 }
700
701 return changed;
702}
703
Tomas Winklerf5e5bf22008-09-08 17:33:39 +0200704static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata,
705 struct ieee80211_if_sta *ifsta)
706{
707 union iwreq_data wrqu;
708 memset(&wrqu, 0, sizeof(wrqu));
709 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
710 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
711 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
712 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
713}
714
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200715static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -0700716 struct ieee80211_if_sta *ifsta)
717{
Linus Torvalds74af0252008-09-05 12:38:09 -0700718 char *buf;
719 size_t len;
720 int i;
Jiri Bencf0706e82007-05-05 11:45:53 -0700721 union iwreq_data wrqu;
722
Linus Torvalds74af0252008-09-05 12:38:09 -0700723 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
724 return;
725
726 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
727 ifsta->assocresp_ies_len), GFP_KERNEL);
728 if (!buf)
729 return;
730
731 len = sprintf(buf, "ASSOCINFO(");
Jiri Bencf0706e82007-05-05 11:45:53 -0700732 if (ifsta->assocreq_ies) {
Linus Torvalds74af0252008-09-05 12:38:09 -0700733 len += sprintf(buf + len, "ReqIEs=");
734 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
735 len += sprintf(buf + len, "%02x",
736 ifsta->assocreq_ies[i]);
737 }
Jiri Bencf0706e82007-05-05 11:45:53 -0700738 }
739 if (ifsta->assocresp_ies) {
Linus Torvalds74af0252008-09-05 12:38:09 -0700740 if (ifsta->assocreq_ies)
741 len += sprintf(buf + len, " ");
742 len += sprintf(buf + len, "RespIEs=");
743 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
744 len += sprintf(buf + len, "%02x",
745 ifsta->assocresp_ies[i]);
746 }
Jiri Bencf0706e82007-05-05 11:45:53 -0700747 }
Linus Torvalds74af0252008-09-05 12:38:09 -0700748 len += sprintf(buf + len, ")");
749
750 if (len > IW_CUSTOM_MAX) {
751 len = sprintf(buf, "ASSOCRESPIE=");
752 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
753 len += sprintf(buf + len, "%02x",
754 ifsta->assocresp_ies[i]);
755 }
756 }
757
John W. Linvillead788b52008-10-01 15:45:02 -0400758 if (len <= IW_CUSTOM_MAX) {
759 memset(&wrqu, 0, sizeof(wrqu));
760 wrqu.data.length = len;
761 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
762 }
Linus Torvalds74af0252008-09-05 12:38:09 -0700763
764 kfree(buf);
Jiri Bencf0706e82007-05-05 11:45:53 -0700765}
766
767
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200768static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
Johannes Bergae5eb022008-10-14 16:58:37 +0200769 struct ieee80211_if_sta *ifsta,
770 u32 bss_info_changed)
Jiri Bencf0706e82007-05-05 11:45:53 -0700771{
Johannes Berg471b3ef2007-12-28 14:32:58 +0100772 struct ieee80211_local *local = sdata->local;
Tomas Winkler38668c02008-03-28 16:33:32 -0700773 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
Jiri Bencf0706e82007-05-05 11:45:53 -0700774
Johannes Bergc2b13452008-09-11 00:01:55 +0200775 struct ieee80211_bss *bss;
Jiri Slabyd6f2da52007-08-28 17:01:54 -0400776
Johannes Bergae5eb022008-10-14 16:58:37 +0200777 bss_info_changed |= BSS_CHANGED_ASSOC;
Tomas Winklerf5e5bf22008-09-08 17:33:39 +0200778 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
Jiri Slabyd6f2da52007-08-28 17:01:54 -0400779
Johannes Berg05c914f2008-09-11 00:01:58 +0200780 if (sdata->vif.type != NL80211_IFTYPE_STATION)
Tomas Winklerf5e5bf22008-09-08 17:33:39 +0200781 return;
Daniel Drake56282212007-07-10 19:32:10 +0200782
Tomas Winklerf5e5bf22008-09-08 17:33:39 +0200783 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
784 conf->channel->center_freq,
785 ifsta->ssid, ifsta->ssid_len);
786 if (bss) {
787 /* set timing information */
Johannes Bergbda39332008-10-11 01:51:51 +0200788 sdata->vif.bss_conf.beacon_int = bss->beacon_int;
789 sdata->vif.bss_conf.timestamp = bss->timestamp;
790 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
Tomas Winkler21c0cbe2008-03-28 16:33:34 -0700791
Johannes Bergae5eb022008-10-14 16:58:37 +0200792 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
Johannes Berg7a5158e2008-10-08 10:59:33 +0200793 bss->capability, bss->has_erp_value, bss->erp_value);
Tomas Winkler21c0cbe2008-03-28 16:33:34 -0700794
Tomas Winklerf5e5bf22008-09-08 17:33:39 +0200795 ieee80211_rx_bss_put(local, bss);
Jiri Bencf0706e82007-05-05 11:45:53 -0700796 }
Johannes Berg471b3ef2007-12-28 14:32:58 +0100797
Tomas Winklerf5e5bf22008-09-08 17:33:39 +0200798 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
799 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
800 ieee80211_sta_send_associnfo(sdata, ifsta);
801
802 ifsta->last_probe = jiffies;
803 ieee80211_led_assoc(local, 1);
804
Johannes Bergbda39332008-10-11 01:51:51 +0200805 sdata->vif.bss_conf.assoc = 1;
Johannes Berg96dd22a2008-09-11 00:01:57 +0200806 /*
807 * For now just always ask the driver to update the basic rateset
808 * when we have associated, we aren't checking whether it actually
809 * changed or not.
810 */
Johannes Bergae5eb022008-10-14 16:58:37 +0200811 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
812 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
Guy Cohen8db93692008-07-03 19:56:13 +0300813
Johannes Berg4be8c382009-01-07 18:28:20 +0100814 if (local->powersave) {
815 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) &&
816 local->hw.conf.dynamic_ps_timeout > 0) {
Kalle Valo520eb822008-12-18 23:35:27 +0200817 mod_timer(&local->dynamic_ps_timer, jiffies +
Johannes Berg46f2c4b2009-01-06 18:13:18 +0100818 msecs_to_jiffies(
819 local->hw.conf.dynamic_ps_timeout));
Johannes Berg4be8c382009-01-07 18:28:20 +0100820 } else {
821 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
822 ieee80211_send_nullfunc(local, sdata, 1);
Kalle Valo520eb822008-12-18 23:35:27 +0200823 conf->flags |= IEEE80211_CONF_PS;
Johannes Berg4be8c382009-01-07 18:28:20 +0100824 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
Kalle Valo520eb822008-12-18 23:35:27 +0200825 }
Kalle Valoe0cb6862008-12-18 23:35:13 +0200826 }
827
Tomas Winkler24e64622008-09-08 17:33:40 +0200828 netif_tx_start_all_queues(sdata->dev);
Tomas Winklerf5e5bf22008-09-08 17:33:39 +0200829 netif_carrier_on(sdata->dev);
Guy Cohen8db93692008-07-03 19:56:13 +0300830
Tomas Winklerf5e5bf22008-09-08 17:33:39 +0200831 ieee80211_sta_send_apinfo(sdata, ifsta);
Jiri Bencf0706e82007-05-05 11:45:53 -0700832}
833
Ron Rindjunsky9859b812008-08-09 03:02:19 +0300834static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
835 struct ieee80211_if_sta *ifsta)
836{
Ron Rindjunsky9859b812008-08-09 03:02:19 +0300837 ifsta->direct_probe_tries++;
838 if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
Johannes Berg0c68ae262008-10-27 15:56:10 -0700839 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
840 sdata->dev->name, ifsta->bssid);
Ron Rindjunsky9859b812008-08-09 03:02:19 +0300841 ifsta->state = IEEE80211_STA_MLME_DISABLED;
Johannes Berg4a68ec52008-10-16 21:44:44 +0200842 ieee80211_sta_send_apinfo(sdata, ifsta);
Ron Rindjunsky9859b812008-08-09 03:02:19 +0300843 return;
844 }
845
Johannes Berg0c68ae262008-10-27 15:56:10 -0700846 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
847 sdata->dev->name, ifsta->bssid,
Ron Rindjunsky9859b812008-08-09 03:02:19 +0300848 ifsta->direct_probe_tries);
849
850 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
851
852 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request);
853
854 /* Direct probe is sent to broadcast address as some APs
855 * will not answer to direct packet in unassociated state.
856 */
857 ieee80211_send_probe_req(sdata, NULL,
858 ifsta->ssid, ifsta->ssid_len);
859
860 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
861}
862
Jiri Bencf0706e82007-05-05 11:45:53 -0700863
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200864static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -0700865 struct ieee80211_if_sta *ifsta)
866{
867 ifsta->auth_tries++;
868 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
Johannes Berg0c68ae262008-10-27 15:56:10 -0700869 printk(KERN_DEBUG "%s: authentication with AP %pM"
Jiri Bencf0706e82007-05-05 11:45:53 -0700870 " timed out\n",
Johannes Berg0c68ae262008-10-27 15:56:10 -0700871 sdata->dev->name, ifsta->bssid);
Tomas Winkler48c2fc52008-08-06 14:22:01 +0300872 ifsta->state = IEEE80211_STA_MLME_DISABLED;
Johannes Berg4a68ec52008-10-16 21:44:44 +0200873 ieee80211_sta_send_apinfo(sdata, ifsta);
Jiri Bencf0706e82007-05-05 11:45:53 -0700874 return;
875 }
876
Tomas Winkler48c2fc52008-08-06 14:22:01 +0300877 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
Johannes Berg0c68ae262008-10-27 15:56:10 -0700878 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
879 sdata->dev->name, ifsta->bssid);
Jiri Bencf0706e82007-05-05 11:45:53 -0700880
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200881 ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
Jiri Bencf0706e82007-05-05 11:45:53 -0700882
883 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
884}
885
Vivek Natarajan5925d972008-11-21 22:19:50 -0800886/*
887 * The disassoc 'reason' argument can be either our own reason
888 * if self disconnected or a reason code from the AP.
889 */
Tomas Winkleraa458d12008-09-09 00:32:12 +0300890static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
891 struct ieee80211_if_sta *ifsta, bool deauth,
892 bool self_disconnected, u16 reason)
893{
894 struct ieee80211_local *local = sdata->local;
895 struct sta_info *sta;
Kalle Valoe0cb6862008-12-18 23:35:13 +0200896 u32 changed = 0, config_changed = 0;
Tomas Winkleraa458d12008-09-09 00:32:12 +0300897
898 rcu_read_lock();
899
900 sta = sta_info_get(local, ifsta->bssid);
901 if (!sta) {
902 rcu_read_unlock();
903 return;
904 }
905
906 if (deauth) {
907 ifsta->direct_probe_tries = 0;
908 ifsta->auth_tries = 0;
909 }
910 ifsta->assoc_scan_tries = 0;
911 ifsta->assoc_tries = 0;
912
Tomas Winkler24e64622008-09-08 17:33:40 +0200913 netif_tx_stop_all_queues(sdata->dev);
Tomas Winkleraa458d12008-09-09 00:32:12 +0300914 netif_carrier_off(sdata->dev);
915
Johannes Berg17741cd2008-09-11 00:02:02 +0200916 ieee80211_sta_tear_down_BA_sessions(sdata, sta->sta.addr);
Tomas Winkleraa458d12008-09-09 00:32:12 +0300917
918 if (self_disconnected) {
919 if (deauth)
Johannes Bergef422bc2008-09-09 10:58:25 +0200920 ieee80211_send_deauth_disassoc(sdata,
921 IEEE80211_STYPE_DEAUTH, reason);
Tomas Winkleraa458d12008-09-09 00:32:12 +0300922 else
Johannes Bergef422bc2008-09-09 10:58:25 +0200923 ieee80211_send_deauth_disassoc(sdata,
924 IEEE80211_STYPE_DISASSOC, reason);
Tomas Winkleraa458d12008-09-09 00:32:12 +0300925 }
926
Tomas Winklerf5e5bf22008-09-08 17:33:39 +0200927 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
928 changed |= ieee80211_reset_erp_info(sdata);
929
Tomas Winklerf5e5bf22008-09-08 17:33:39 +0200930 ieee80211_led_assoc(local, 0);
Johannes Bergae5eb022008-10-14 16:58:37 +0200931 changed |= BSS_CHANGED_ASSOC;
932 sdata->vif.bss_conf.assoc = false;
Tomas Winklerf5e5bf22008-09-08 17:33:39 +0200933
934 ieee80211_sta_send_apinfo(sdata, ifsta);
Tomas Winkleraa458d12008-09-09 00:32:12 +0300935
Vivek Natarajan5925d972008-11-21 22:19:50 -0800936 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT)
Tomas Winkleraa458d12008-09-09 00:32:12 +0300937 ifsta->state = IEEE80211_STA_MLME_DISABLED;
938
Tomas Winkleraa458d12008-09-09 00:32:12 +0300939 rcu_read_unlock();
940
Johannes Berg47979382009-01-07 10:13:27 +0100941 /* channel(_type) changes are handled by ieee80211_hw_config */
Sujith094d05d2008-12-12 11:57:43 +0530942 local->oper_channel_type = NL80211_CHAN_NO_HT;
Johannes Bergae5eb022008-10-14 16:58:37 +0200943
Vasanthakumar Thiagarajana8302de2009-01-09 18:14:15 +0530944 local->power_constr_level = 0;
945
Kalle Valo520eb822008-12-18 23:35:27 +0200946 del_timer_sync(&local->dynamic_ps_timer);
947 cancel_work_sync(&local->dynamic_ps_enable_work);
948
Kalle Valoe0cb6862008-12-18 23:35:13 +0200949 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
950 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
951 config_changed |= IEEE80211_CONF_CHANGE_PS;
952 }
953
954 ieee80211_hw_config(local, config_changed);
Johannes Bergae5eb022008-10-14 16:58:37 +0200955 ieee80211_bss_info_change_notify(sdata, changed);
Tomas Winkler8e268e42008-11-25 13:05:44 +0200956
957 rcu_read_lock();
958
959 sta = sta_info_get(local, ifsta->bssid);
960 if (!sta) {
961 rcu_read_unlock();
962 return;
963 }
964
965 sta_info_unlink(&sta);
966
967 rcu_read_unlock();
968
969 sta_info_destroy(sta);
Tomas Winkleraa458d12008-09-09 00:32:12 +0300970}
Jiri Bencf0706e82007-05-05 11:45:53 -0700971
Johannes Berg9ac19a92008-09-09 10:57:09 +0200972static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
973{
974 if (!sdata || !sdata->default_key ||
975 sdata->default_key->conf.alg != ALG_WEP)
976 return 0;
977 return 1;
978}
979
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200980static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -0700981 struct ieee80211_if_sta *ifsta)
982{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200983 struct ieee80211_local *local = sdata->local;
Johannes Bergc2b13452008-09-11 00:01:55 +0200984 struct ieee80211_bss *bss;
Johannes Berg5b98b1f2007-11-03 13:11:10 +0000985 int bss_privacy;
986 int wep_privacy;
987 int privacy_invoked;
Jiri Bencf0706e82007-05-05 11:45:53 -0700988
Johannes Berg5b98b1f2007-11-03 13:11:10 +0000989 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
Jiri Bencf0706e82007-05-05 11:45:53 -0700990 return 0;
991
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200992 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
Johannes Berg8318d782008-01-24 19:38:38 +0100993 local->hw.conf.channel->center_freq,
John W. Linvillecffdd302007-10-05 14:23:27 -0400994 ifsta->ssid, ifsta->ssid_len);
Jiri Bencf0706e82007-05-05 11:45:53 -0700995 if (!bss)
996 return 0;
997
Johannes Berg5b98b1f2007-11-03 13:11:10 +0000998 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200999 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
Johannes Berg5b98b1f2007-11-03 13:11:10 +00001000 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
Jiri Bencf0706e82007-05-05 11:45:53 -07001001
Johannes Berg3e122be2008-07-09 14:40:34 +02001002 ieee80211_rx_bss_put(local, bss);
Jiri Bencf0706e82007-05-05 11:45:53 -07001003
Johannes Berg5b98b1f2007-11-03 13:11:10 +00001004 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
1005 return 0;
1006
1007 return 1;
Jiri Bencf0706e82007-05-05 11:45:53 -07001008}
1009
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001010static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001011 struct ieee80211_if_sta *ifsta)
1012{
1013 ifsta->assoc_tries++;
1014 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
Johannes Berg0c68ae262008-10-27 15:56:10 -07001015 printk(KERN_DEBUG "%s: association with AP %pM"
Jiri Bencf0706e82007-05-05 11:45:53 -07001016 " timed out\n",
Johannes Berg0c68ae262008-10-27 15:56:10 -07001017 sdata->dev->name, ifsta->bssid);
Tomas Winkler48c2fc52008-08-06 14:22:01 +03001018 ifsta->state = IEEE80211_STA_MLME_DISABLED;
Johannes Berg4a68ec52008-10-16 21:44:44 +02001019 ieee80211_sta_send_apinfo(sdata, ifsta);
Jiri Bencf0706e82007-05-05 11:45:53 -07001020 return;
1021 }
1022
Tomas Winkler48c2fc52008-08-06 14:22:01 +03001023 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
Johannes Berg0c68ae262008-10-27 15:56:10 -07001024 printk(KERN_DEBUG "%s: associate with AP %pM\n",
1025 sdata->dev->name, ifsta->bssid);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001026 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
Jiri Bencf0706e82007-05-05 11:45:53 -07001027 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001028 "mixed-cell disabled - abort association\n", sdata->dev->name);
Tomas Winkler48c2fc52008-08-06 14:22:01 +03001029 ifsta->state = IEEE80211_STA_MLME_DISABLED;
Jiri Bencf0706e82007-05-05 11:45:53 -07001030 return;
1031 }
1032
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001033 ieee80211_send_assoc(sdata, ifsta);
Jiri Bencf0706e82007-05-05 11:45:53 -07001034
1035 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1036}
1037
1038
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001039static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001040 struct ieee80211_if_sta *ifsta)
1041{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001042 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -07001043 struct sta_info *sta;
1044 int disassoc;
1045
1046 /* TODO: start monitoring current AP signal quality and number of
1047 * missed beacons. Scan other channels every now and then and search
1048 * for better APs. */
1049 /* TODO: remove expired BSSes */
1050
Tomas Winkler48c2fc52008-08-06 14:22:01 +03001051 ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
Jiri Bencf0706e82007-05-05 11:45:53 -07001052
Johannes Bergd0709a62008-02-25 16:27:46 +01001053 rcu_read_lock();
1054
Jiri Bencf0706e82007-05-05 11:45:53 -07001055 sta = sta_info_get(local, ifsta->bssid);
1056 if (!sta) {
Johannes Berg0c68ae262008-10-27 15:56:10 -07001057 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
1058 sdata->dev->name, ifsta->bssid);
Jiri Bencf0706e82007-05-05 11:45:53 -07001059 disassoc = 1;
1060 } else {
1061 disassoc = 0;
1062 if (time_after(jiffies,
1063 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
Jiri Slabyd6f2da52007-08-28 17:01:54 -04001064 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
Jiri Bencf0706e82007-05-05 11:45:53 -07001065 printk(KERN_DEBUG "%s: No ProbeResp from "
Johannes Berg0c68ae262008-10-27 15:56:10 -07001066 "current AP %pM - assume out of "
Jiri Bencf0706e82007-05-05 11:45:53 -07001067 "range\n",
Johannes Berg0c68ae262008-10-27 15:56:10 -07001068 sdata->dev->name, ifsta->bssid);
Jiri Bencf0706e82007-05-05 11:45:53 -07001069 disassoc = 1;
Jiri Slabyd6f2da52007-08-28 17:01:54 -04001070 } else
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001071 ieee80211_send_probe_req(sdata, ifsta->bssid,
Johannes Berg4dfe51e2008-09-19 05:10:34 +02001072 ifsta->ssid,
1073 ifsta->ssid_len);
Jiri Slabyd6f2da52007-08-28 17:01:54 -04001074 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
Jiri Bencf0706e82007-05-05 11:45:53 -07001075 } else {
Jiri Slabyd6f2da52007-08-28 17:01:54 -04001076 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
Jiri Bencf0706e82007-05-05 11:45:53 -07001077 if (time_after(jiffies, ifsta->last_probe +
1078 IEEE80211_PROBE_INTERVAL)) {
1079 ifsta->last_probe = jiffies;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001080 ieee80211_send_probe_req(sdata, ifsta->bssid,
Jiri Bencf0706e82007-05-05 11:45:53 -07001081 ifsta->ssid,
1082 ifsta->ssid_len);
1083 }
1084 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001085 }
Johannes Bergd0709a62008-02-25 16:27:46 +01001086
1087 rcu_read_unlock();
1088
Tomas Winkleraa458d12008-09-09 00:32:12 +03001089 if (disassoc)
1090 ieee80211_set_disassoc(sdata, ifsta, true, true,
1091 WLAN_REASON_PREV_AUTH_NOT_VALID);
1092 else
Jiri Bencf0706e82007-05-05 11:45:53 -07001093 mod_timer(&ifsta->timer, jiffies +
1094 IEEE80211_MONITORING_INTERVAL);
Jiri Bencf0706e82007-05-05 11:45:53 -07001095}
1096
1097
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001098static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001099 struct ieee80211_if_sta *ifsta)
1100{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001101 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
Jiri Slabyd6f2da52007-08-28 17:01:54 -04001102 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001103 ieee80211_associate(sdata, ifsta);
Jiri Bencf0706e82007-05-05 11:45:53 -07001104}
1105
1106
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001107static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001108 struct ieee80211_if_sta *ifsta,
1109 struct ieee80211_mgmt *mgmt,
1110 size_t len)
1111{
1112 u8 *pos;
1113 struct ieee802_11_elems elems;
1114
Jiri Bencf0706e82007-05-05 11:45:53 -07001115 pos = mgmt->u.auth.variable;
John W. Linville67a4cce2007-10-12 16:40:37 -04001116 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001117 if (!elems.challenge)
Jiri Bencf0706e82007-05-05 11:45:53 -07001118 return;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001119 ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
Jiri Bencf0706e82007-05-05 11:45:53 -07001120 elems.challenge_len + 2, 1);
1121}
1122
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001123static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001124 struct ieee80211_if_sta *ifsta,
1125 struct ieee80211_mgmt *mgmt,
1126 size_t len)
1127{
Jiri Bencf0706e82007-05-05 11:45:53 -07001128 u16 auth_alg, auth_transaction, status_code;
1129
Tomas Winkler48c2fc52008-08-06 14:22:01 +03001130 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
Johannes Berg05c914f2008-09-11 00:01:58 +02001131 sdata->vif.type != NL80211_IFTYPE_ADHOC)
Jiri Bencf0706e82007-05-05 11:45:53 -07001132 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001133
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001134 if (len < 24 + 6)
Jiri Bencf0706e82007-05-05 11:45:53 -07001135 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001136
Johannes Berg05c914f2008-09-11 00:01:58 +02001137 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001138 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
Jiri Bencf0706e82007-05-05 11:45:53 -07001139 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001140
Johannes Berg05c914f2008-09-11 00:01:58 +02001141 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001142 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
Jiri Bencf0706e82007-05-05 11:45:53 -07001143 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001144
1145 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1146 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1147 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1148
Johannes Berg05c914f2008-09-11 00:01:58 +02001149 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
Johannes Berg135a2112008-06-16 20:55:29 +02001150 /*
1151 * IEEE 802.11 standard does not require authentication in IBSS
Jiri Bencf0706e82007-05-05 11:45:53 -07001152 * networks and most implementations do not seem to use it.
1153 * However, try to reply to authentication attempts if someone
1154 * has actually implemented this.
Johannes Berg135a2112008-06-16 20:55:29 +02001155 */
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001156 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
Jiri Bencf0706e82007-05-05 11:45:53 -07001157 return;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001158 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
Jiri Bencf0706e82007-05-05 11:45:53 -07001159 }
1160
1161 if (auth_alg != ifsta->auth_alg ||
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001162 auth_transaction != ifsta->auth_transaction)
Jiri Bencf0706e82007-05-05 11:45:53 -07001163 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001164
1165 if (status_code != WLAN_STATUS_SUCCESS) {
Jiri Bencf0706e82007-05-05 11:45:53 -07001166 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1167 u8 algs[3];
1168 const int num_algs = ARRAY_SIZE(algs);
1169 int i, pos;
1170 algs[0] = algs[1] = algs[2] = 0xff;
1171 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1172 algs[0] = WLAN_AUTH_OPEN;
1173 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1174 algs[1] = WLAN_AUTH_SHARED_KEY;
1175 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1176 algs[2] = WLAN_AUTH_LEAP;
1177 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1178 pos = 0;
1179 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1180 pos = 1;
1181 else
1182 pos = 2;
1183 for (i = 0; i < num_algs; i++) {
1184 pos++;
1185 if (pos >= num_algs)
1186 pos = 0;
1187 if (algs[pos] == ifsta->auth_alg ||
1188 algs[pos] == 0xff)
1189 continue;
1190 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001191 !ieee80211_sta_wep_configured(sdata))
Jiri Bencf0706e82007-05-05 11:45:53 -07001192 continue;
1193 ifsta->auth_alg = algs[pos];
Jiri Bencf0706e82007-05-05 11:45:53 -07001194 break;
1195 }
1196 }
1197 return;
1198 }
1199
1200 switch (ifsta->auth_alg) {
1201 case WLAN_AUTH_OPEN:
1202 case WLAN_AUTH_LEAP:
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001203 ieee80211_auth_completed(sdata, ifsta);
Jiri Bencf0706e82007-05-05 11:45:53 -07001204 break;
1205 case WLAN_AUTH_SHARED_KEY:
1206 if (ifsta->auth_transaction == 4)
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001207 ieee80211_auth_completed(sdata, ifsta);
Jiri Bencf0706e82007-05-05 11:45:53 -07001208 else
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001209 ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
Jiri Bencf0706e82007-05-05 11:45:53 -07001210 break;
1211 }
1212}
1213
1214
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001215static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001216 struct ieee80211_if_sta *ifsta,
1217 struct ieee80211_mgmt *mgmt,
1218 size_t len)
1219{
1220 u16 reason_code;
1221
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001222 if (len < 24 + 2)
Jiri Bencf0706e82007-05-05 11:45:53 -07001223 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001224
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001225 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
Jiri Bencf0706e82007-05-05 11:45:53 -07001226 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001227
1228 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1229
Johannes Berg988c0f72008-04-17 19:21:22 +02001230 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
Zhu Yi97c8b012008-10-28 15:58:31 +08001231 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1232 sdata->dev->name, reason_code);
Jiri Bencf0706e82007-05-05 11:45:53 -07001233
Tomas Winkler48c2fc52008-08-06 14:22:01 +03001234 if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1235 ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
1236 ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
Ron Rindjunsky9859b812008-08-09 03:02:19 +03001237 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
Jiri Bencf0706e82007-05-05 11:45:53 -07001238 mod_timer(&ifsta->timer, jiffies +
1239 IEEE80211_RETRY_AUTH_INTERVAL);
1240 }
1241
Tomas Winkleraa458d12008-09-09 00:32:12 +03001242 ieee80211_set_disassoc(sdata, ifsta, true, false, 0);
Jiri Slabyd6f2da52007-08-28 17:01:54 -04001243 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
Jiri Bencf0706e82007-05-05 11:45:53 -07001244}
1245
1246
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001247static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001248 struct ieee80211_if_sta *ifsta,
1249 struct ieee80211_mgmt *mgmt,
1250 size_t len)
1251{
1252 u16 reason_code;
1253
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001254 if (len < 24 + 2)
Jiri Bencf0706e82007-05-05 11:45:53 -07001255 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001256
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001257 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
Jiri Bencf0706e82007-05-05 11:45:53 -07001258 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001259
1260 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1261
Jiri Slabyd6f2da52007-08-28 17:01:54 -04001262 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
Zhu Yi97c8b012008-10-28 15:58:31 +08001263 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1264 sdata->dev->name, reason_code);
Jiri Bencf0706e82007-05-05 11:45:53 -07001265
Tomas Winkler48c2fc52008-08-06 14:22:01 +03001266 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1267 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
Jiri Bencf0706e82007-05-05 11:45:53 -07001268 mod_timer(&ifsta->timer, jiffies +
1269 IEEE80211_RETRY_AUTH_INTERVAL);
1270 }
1271
Vivek Natarajan5925d972008-11-21 22:19:50 -08001272 ieee80211_set_disassoc(sdata, ifsta, false, false, reason_code);
Jiri Bencf0706e82007-05-05 11:45:53 -07001273}
1274
1275
Johannes Berg471b3ef2007-12-28 14:32:58 +01001276static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001277 struct ieee80211_if_sta *ifsta,
1278 struct ieee80211_mgmt *mgmt,
1279 size_t len,
1280 int reassoc)
1281{
Johannes Berg471b3ef2007-12-28 14:32:58 +01001282 struct ieee80211_local *local = sdata->local;
Johannes Berg8318d782008-01-24 19:38:38 +01001283 struct ieee80211_supported_band *sband;
Jiri Bencf0706e82007-05-05 11:45:53 -07001284 struct sta_info *sta;
Johannes Berg881d9482009-01-21 15:13:48 +01001285 u32 rates, basic_rates;
Jiri Bencf0706e82007-05-05 11:45:53 -07001286 u16 capab_info, status_code, aid;
1287 struct ieee802_11_elems elems;
Johannes Bergbda39332008-10-11 01:51:51 +02001288 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
Jiri Bencf0706e82007-05-05 11:45:53 -07001289 u8 *pos;
Johannes Bergae5eb022008-10-14 16:58:37 +02001290 u32 changed = 0;
Jiri Bencf0706e82007-05-05 11:45:53 -07001291 int i, j;
Johannes Bergddf4ac52008-10-22 11:41:38 +02001292 bool have_higher_than_11mbit = false, newsta = false;
Johannes Bergae5eb022008-10-14 16:58:37 +02001293 u16 ap_ht_cap_flags;
Jiri Bencf0706e82007-05-05 11:45:53 -07001294
1295 /* AssocResp and ReassocResp have identical structure, so process both
1296 * of them in this function. */
1297
Tomas Winkler48c2fc52008-08-06 14:22:01 +03001298 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
Jiri Bencf0706e82007-05-05 11:45:53 -07001299 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001300
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001301 if (len < 24 + 6)
Jiri Bencf0706e82007-05-05 11:45:53 -07001302 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001303
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001304 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
Jiri Bencf0706e82007-05-05 11:45:53 -07001305 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001306
1307 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1308 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1309 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
Jiri Bencf0706e82007-05-05 11:45:53 -07001310
Johannes Berg0c68ae262008-10-27 15:56:10 -07001311 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
Jiri Bencf0706e82007-05-05 11:45:53 -07001312 "status=%d aid=%d)\n",
Johannes Berg0c68ae262008-10-27 15:56:10 -07001313 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
Johannes Bergddd68582007-10-22 14:51:37 +02001314 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
Jiri Bencf0706e82007-05-05 11:45:53 -07001315
Jouni Malinen63a5ab82009-01-08 13:32:09 +02001316 pos = mgmt->u.assoc_resp.variable;
1317 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1318
1319 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
Jouni Malinenf797eb72009-01-19 18:48:46 +02001320 elems.timeout_int && elems.timeout_int_len == 5 &&
1321 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
Jouni Malinen63a5ab82009-01-08 13:32:09 +02001322 u32 tu, ms;
Jouni Malinenf797eb72009-01-19 18:48:46 +02001323 tu = get_unaligned_le32(elems.timeout_int + 1);
Jouni Malinen63a5ab82009-01-08 13:32:09 +02001324 ms = tu * 1024 / 1000;
1325 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1326 "comeback duration %u TU (%u ms)\n",
1327 sdata->dev->name, tu, ms);
1328 if (ms > IEEE80211_ASSOC_TIMEOUT)
1329 mod_timer(&ifsta->timer,
1330 jiffies + msecs_to_jiffies(ms));
1331 return;
1332 }
1333
Jiri Bencf0706e82007-05-05 11:45:53 -07001334 if (status_code != WLAN_STATUS_SUCCESS) {
1335 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001336 sdata->dev->name, status_code);
Daniel Drake8a69aa92007-07-27 15:43:23 +02001337 /* if this was a reassociation, ensure we try a "full"
1338 * association next time. This works around some broken APs
1339 * which do not correctly reject reassociation requests. */
Jiri Slabyd6f2da52007-08-28 17:01:54 -04001340 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
Jiri Bencf0706e82007-05-05 11:45:53 -07001341 return;
1342 }
1343
Johannes Berg1dd84aa2007-10-10 12:03:41 +02001344 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1345 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001346 "set\n", sdata->dev->name, aid);
Johannes Berg1dd84aa2007-10-10 12:03:41 +02001347 aid &= ~(BIT(15) | BIT(14));
1348
Jiri Bencf0706e82007-05-05 11:45:53 -07001349 if (!elems.supp_rates) {
1350 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001351 sdata->dev->name);
Jiri Bencf0706e82007-05-05 11:45:53 -07001352 return;
1353 }
1354
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001355 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
Jiri Bencf0706e82007-05-05 11:45:53 -07001356 ifsta->aid = aid;
1357 ifsta->ap_capab = capab_info;
1358
1359 kfree(ifsta->assocresp_ies);
1360 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
Michael Wu0ec0b7a2007-07-27 15:43:24 +02001361 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
Jiri Bencf0706e82007-05-05 11:45:53 -07001362 if (ifsta->assocresp_ies)
1363 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1364
Johannes Bergd0709a62008-02-25 16:27:46 +01001365 rcu_read_lock();
1366
Jiri Bencf0706e82007-05-05 11:45:53 -07001367 /* Add STA entry for the AP */
1368 sta = sta_info_get(local, ifsta->bssid);
1369 if (!sta) {
Johannes Bergc2b13452008-09-11 00:01:55 +02001370 struct ieee80211_bss *bss;
Johannes Bergddf4ac52008-10-22 11:41:38 +02001371
1372 newsta = true;
Johannes Bergd0709a62008-02-25 16:27:46 +01001373
Johannes Berg73651ee2008-02-25 16:27:47 +01001374 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1375 if (!sta) {
1376 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001377 " the AP\n", sdata->dev->name);
Johannes Bergd0709a62008-02-25 16:27:46 +01001378 rcu_read_unlock();
Jiri Bencf0706e82007-05-05 11:45:53 -07001379 return;
1380 }
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001381 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
Johannes Berg8318d782008-01-24 19:38:38 +01001382 local->hw.conf.channel->center_freq,
John W. Linvillecffdd302007-10-05 14:23:27 -04001383 ifsta->ssid, ifsta->ssid_len);
Jiri Bencf0706e82007-05-05 11:45:53 -07001384 if (bss) {
Jiri Bencf0706e82007-05-05 11:45:53 -07001385 sta->last_signal = bss->signal;
Bruno Randolf566bfe52008-05-08 19:15:40 +02001386 sta->last_qual = bss->qual;
Jiri Bencf0706e82007-05-05 11:45:53 -07001387 sta->last_noise = bss->noise;
Johannes Berg3e122be2008-07-09 14:40:34 +02001388 ieee80211_rx_bss_put(local, bss);
Jiri Bencf0706e82007-05-05 11:45:53 -07001389 }
Johannes Berg73651ee2008-02-25 16:27:47 +01001390
Ron Rindjunskya61dae12008-08-10 00:54:34 +03001391 /* update new sta with its last rx activity */
1392 sta->last_rx = jiffies;
Jiri Bencf0706e82007-05-05 11:45:53 -07001393 }
1394
Johannes Berg73651ee2008-02-25 16:27:47 +01001395 /*
1396 * FIXME: Do we really need to update the sta_info's information here?
1397 * We already know about the AP (we found it in our list) so it
1398 * should already be filled with the right info, no?
1399 * As is stands, all this is racy because typically we assume
1400 * the information that is filled in here (except flags) doesn't
1401 * change while a STA structure is alive. As such, it should move
1402 * to between the sta_info_alloc() and sta_info_insert() above.
1403 */
1404
Johannes Berg07346f812008-05-03 01:02:02 +02001405 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1406 WLAN_STA_AUTHORIZED);
Jiri Bencf0706e82007-05-05 11:45:53 -07001407
1408 rates = 0;
Johannes Berg8318d782008-01-24 19:38:38 +01001409 basic_rates = 0;
1410 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1411
Jiri Bencf0706e82007-05-05 11:45:53 -07001412 for (i = 0; i < elems.supp_rates_len; i++) {
1413 int rate = (elems.supp_rates[i] & 0x7f) * 5;
Tomas Winklerd61272c2008-10-30 17:08:08 +02001414 bool is_basic = !!(elems.supp_rates[i] & 0x80);
Johannes Berg8318d782008-01-24 19:38:38 +01001415
1416 if (rate > 110)
1417 have_higher_than_11mbit = true;
1418
1419 for (j = 0; j < sband->n_bitrates; j++) {
Tomas Winklerd61272c2008-10-30 17:08:08 +02001420 if (sband->bitrates[j].bitrate == rate) {
Jiri Bencf0706e82007-05-05 11:45:53 -07001421 rates |= BIT(j);
Tomas Winklerd61272c2008-10-30 17:08:08 +02001422 if (is_basic)
1423 basic_rates |= BIT(j);
1424 break;
1425 }
Johannes Berg8318d782008-01-24 19:38:38 +01001426 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001427 }
Johannes Berg8318d782008-01-24 19:38:38 +01001428
Jiri Bencf0706e82007-05-05 11:45:53 -07001429 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1430 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
Tomas Winklerd61272c2008-10-30 17:08:08 +02001431 bool is_basic = !!(elems.supp_rates[i] & 0x80);
Johannes Berg8318d782008-01-24 19:38:38 +01001432
1433 if (rate > 110)
1434 have_higher_than_11mbit = true;
1435
1436 for (j = 0; j < sband->n_bitrates; j++) {
Tomas Winklerd61272c2008-10-30 17:08:08 +02001437 if (sband->bitrates[j].bitrate == rate) {
Jiri Bencf0706e82007-05-05 11:45:53 -07001438 rates |= BIT(j);
Tomas Winklerd61272c2008-10-30 17:08:08 +02001439 if (is_basic)
1440 basic_rates |= BIT(j);
1441 break;
1442 }
Johannes Berg8318d782008-01-24 19:38:38 +01001443 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001444 }
Johannes Berg8318d782008-01-24 19:38:38 +01001445
Johannes Berg323ce792008-09-11 02:45:11 +02001446 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
Johannes Bergbda39332008-10-11 01:51:51 +02001447 sdata->vif.bss_conf.basic_rates = basic_rates;
Johannes Berg8318d782008-01-24 19:38:38 +01001448
1449 /* cf. IEEE 802.11 9.2.12 */
1450 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1451 have_higher_than_11mbit)
1452 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1453 else
1454 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
Jiri Bencf0706e82007-05-05 11:45:53 -07001455
Johannes Bergae5eb022008-10-14 16:58:37 +02001456 if (elems.ht_cap_elem)
1457 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
Johannes Bergd9fe60d2008-10-09 12:13:49 +02001458 elems.ht_cap_elem, &sta->sta.ht_cap);
Johannes Bergae5eb022008-10-14 16:58:37 +02001459
1460 ap_ht_cap_flags = sta->sta.ht_cap.cap;
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001461
Johannes Berg4b7679a2008-09-18 18:14:18 +02001462 rate_control_rate_init(sta);
Jiri Bencf0706e82007-05-05 11:45:53 -07001463
Jouni Malinen5394af42009-01-08 13:31:59 +02001464 if (ifsta->flags & IEEE80211_STA_MFP_ENABLED)
1465 set_sta_flags(sta, WLAN_STA_MFP);
1466
Johannes Bergddf4ac52008-10-22 11:41:38 +02001467 if (elems.wmm_param)
Johannes Berg07346f812008-05-03 01:02:02 +02001468 set_sta_flags(sta, WLAN_STA_WME);
Johannes Bergddf4ac52008-10-22 11:41:38 +02001469
1470 if (newsta) {
1471 int err = sta_info_insert(sta);
1472 if (err) {
1473 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1474 " the AP (error %d)\n", sdata->dev->name, err);
1475 rcu_read_unlock();
1476 return;
1477 }
1478 }
1479
1480 rcu_read_unlock();
1481
1482 if (elems.wmm_param)
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001483 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
Jiri Bencf0706e82007-05-05 11:45:53 -07001484 elems.wmm_param_len);
Jiri Bencf0706e82007-05-05 11:45:53 -07001485
Johannes Bergae5eb022008-10-14 16:58:37 +02001486 if (elems.ht_info_elem && elems.wmm_param &&
1487 (ifsta->flags & IEEE80211_STA_WMM_ENABLED))
1488 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1489 ap_ht_cap_flags);
1490
Tomas Winkler21c0cbe2008-03-28 16:33:34 -07001491 /* set AID and assoc capability,
1492 * ieee80211_set_associated() will tell the driver */
Johannes Berg8318d782008-01-24 19:38:38 +01001493 bss_conf->aid = aid;
Tomas Winkler21c0cbe2008-03-28 16:33:34 -07001494 bss_conf->assoc_capability = capab_info;
Johannes Bergae5eb022008-10-14 16:58:37 +02001495 ieee80211_set_associated(sdata, ifsta, changed);
Jiri Bencf0706e82007-05-05 11:45:53 -07001496
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001497 ieee80211_associated(sdata, ifsta);
Jiri Bencf0706e82007-05-05 11:45:53 -07001498}
1499
1500
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001501static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
Bruno Randolfa6072682008-02-18 11:21:15 +09001502 struct ieee80211_if_sta *ifsta,
Johannes Bergc2b13452008-09-11 00:01:55 +02001503 struct ieee80211_bss *bss)
Bruno Randolfa6072682008-02-18 11:21:15 +09001504{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001505 struct ieee80211_local *local = sdata->local;
Bruno Randolfa6072682008-02-18 11:21:15 +09001506 int res, rates, i, j;
1507 struct sk_buff *skb;
1508 struct ieee80211_mgmt *mgmt;
Bruno Randolfa6072682008-02-18 11:21:15 +09001509 u8 *pos;
Bruno Randolfa6072682008-02-18 11:21:15 +09001510 struct ieee80211_supported_band *sband;
Dan Williams507b06d2008-06-03 23:39:55 -04001511 union iwreq_data wrqu;
Bruno Randolfa6072682008-02-18 11:21:15 +09001512
Jouni Malinen9aed3cc2009-01-13 16:03:29 +02001513 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400 +
1514 sdata->u.sta.ie_proberesp_len);
Rami Rosene2ef12d2008-10-22 09:58:39 +02001515 if (!skb) {
1516 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1517 "response\n", sdata->dev->name);
1518 return -ENOMEM;
1519 }
1520
Bruno Randolfa6072682008-02-18 11:21:15 +09001521 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1522
1523 /* Remove possible STA entries from other IBSS networks. */
Johannes Bergdc6676b2008-03-31 19:23:03 +02001524 sta_info_flush_delayed(sdata);
Bruno Randolfa6072682008-02-18 11:21:15 +09001525
1526 if (local->ops->reset_tsf) {
1527 /* Reset own TSF to allow time synchronization work. */
1528 local->ops->reset_tsf(local_to_hw(local));
1529 }
1530 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
Johannes Berg9d139c82008-07-09 14:40:37 +02001531 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
Bruno Randolfa6072682008-02-18 11:21:15 +09001532 if (res)
1533 return res;
1534
1535 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
1536
Bruno Randolfa6072682008-02-18 11:21:15 +09001537 sdata->drop_unencrypted = bss->capability &
1538 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
1539
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001540 res = ieee80211_set_freq(sdata, bss->freq);
Bruno Randolfa6072682008-02-18 11:21:15 +09001541
Assaf Kraussbe038b32008-06-05 19:55:21 +03001542 if (res)
1543 return res;
Bruno Randolfa6072682008-02-18 11:21:15 +09001544
Johannes Berg9d139c82008-07-09 14:40:37 +02001545 /* Build IBSS probe response */
Bruno Randolfa6072682008-02-18 11:21:15 +09001546
Rami Rosene2ef12d2008-10-22 09:58:39 +02001547 skb_reserve(skb, local->hw.extra_tx_headroom);
Bruno Randolfa6072682008-02-18 11:21:15 +09001548
Rami Rosene2ef12d2008-10-22 09:58:39 +02001549 mgmt = (struct ieee80211_mgmt *)
1550 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
1551 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
1552 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1553 IEEE80211_STYPE_PROBE_RESP);
1554 memset(mgmt->da, 0xff, ETH_ALEN);
1555 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1556 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1557 mgmt->u.beacon.beacon_int =
1558 cpu_to_le16(local->hw.conf.beacon_int);
1559 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
1560 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
Bruno Randolfa6072682008-02-18 11:21:15 +09001561
Rami Rosene2ef12d2008-10-22 09:58:39 +02001562 pos = skb_put(skb, 2 + ifsta->ssid_len);
1563 *pos++ = WLAN_EID_SSID;
1564 *pos++ = ifsta->ssid_len;
1565 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
Bruno Randolfa6072682008-02-18 11:21:15 +09001566
Rami Rosene2ef12d2008-10-22 09:58:39 +02001567 rates = bss->supp_rates_len;
1568 if (rates > 8)
1569 rates = 8;
1570 pos = skb_put(skb, 2 + rates);
1571 *pos++ = WLAN_EID_SUPP_RATES;
1572 *pos++ = rates;
1573 memcpy(pos, bss->supp_rates, rates);
Bruno Randolfa6072682008-02-18 11:21:15 +09001574
Rami Rosene2ef12d2008-10-22 09:58:39 +02001575 if (bss->band == IEEE80211_BAND_2GHZ) {
1576 pos = skb_put(skb, 2 + 1);
1577 *pos++ = WLAN_EID_DS_PARAMS;
1578 *pos++ = 1;
1579 *pos++ = ieee80211_frequency_to_channel(bss->freq);
Bruno Randolfa6072682008-02-18 11:21:15 +09001580 }
1581
Rami Rosene2ef12d2008-10-22 09:58:39 +02001582 pos = skb_put(skb, 2 + 2);
1583 *pos++ = WLAN_EID_IBSS_PARAMS;
1584 *pos++ = 2;
1585 /* FIX: set ATIM window based on scan results */
1586 *pos++ = 0;
1587 *pos++ = 0;
1588
1589 if (bss->supp_rates_len > 8) {
1590 rates = bss->supp_rates_len - 8;
1591 pos = skb_put(skb, 2 + rates);
1592 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1593 *pos++ = rates;
1594 memcpy(pos, &bss->supp_rates[8], rates);
1595 }
1596
Jouni Malinen9aed3cc2009-01-13 16:03:29 +02001597 add_extra_ies(skb, sdata->u.sta.ie_proberesp,
1598 sdata->u.sta.ie_proberesp_len);
1599
Rami Rosene2ef12d2008-10-22 09:58:39 +02001600 ifsta->probe_resp = skb;
1601
Johannes Berg078e1e62009-01-22 18:07:31 +01001602 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON |
1603 IEEE80211_IFCC_BEACON_ENABLED);
Rami Rosene2ef12d2008-10-22 09:58:39 +02001604
1605
Johannes Berg9d139c82008-07-09 14:40:37 +02001606 rates = 0;
1607 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1608 for (i = 0; i < bss->supp_rates_len; i++) {
1609 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
1610 for (j = 0; j < sband->n_bitrates; j++)
1611 if (sband->bitrates[j].bitrate == bitrate)
1612 rates |= BIT(j);
1613 }
1614 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
1615
Johannes Bergb079ada2008-09-09 09:32:59 +02001616 ieee80211_sta_def_wmm_params(sdata, bss);
Johannes Berg9d139c82008-07-09 14:40:37 +02001617
Tomas Winkler48c2fc52008-08-06 14:22:01 +03001618 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
Bruno Randolfa6072682008-02-18 11:21:15 +09001619 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1620
Emmanuel Grumbach4492bea2008-09-22 17:10:10 +03001621 ieee80211_led_assoc(local, true);
1622
Dan Williams507b06d2008-06-03 23:39:55 -04001623 memset(&wrqu, 0, sizeof(wrqu));
1624 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001625 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
Bruno Randolfa6072682008-02-18 11:21:15 +09001626
1627 return res;
1628}
1629
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001630static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001631 struct ieee80211_mgmt *mgmt,
1632 size_t len,
1633 struct ieee80211_rx_status *rx_status,
Johannes Berg98c8fcc2008-09-08 17:44:26 +02001634 struct ieee802_11_elems *elems,
1635 bool beacon)
Jiri Bencf0706e82007-05-05 11:45:53 -07001636{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001637 struct ieee80211_local *local = sdata->local;
Johannes Berg98c8fcc2008-09-08 17:44:26 +02001638 int freq;
Johannes Bergc2b13452008-09-11 00:01:55 +02001639 struct ieee80211_bss *bss;
Jiri Bencf0706e82007-05-05 11:45:53 -07001640 struct sta_info *sta;
Johannes Bergfab7d4a2008-03-16 18:42:44 +01001641 struct ieee80211_channel *channel;
Emmanuel Grumbach8e1535d2008-09-03 23:42:20 +03001642 u64 beacon_timestamp, rx_timestamp;
Johannes Berg881d9482009-01-21 15:13:48 +01001643 u32 supp_rates = 0;
Emmanuel Grumbach8e1535d2008-09-03 23:42:20 +03001644 enum ieee80211_band band = rx_status->band;
Jiri Bencf0706e82007-05-05 11:45:53 -07001645
Johannes Berg5bda6172008-09-08 11:05:10 +02001646 if (elems->ds_params && elems->ds_params_len == 1)
1647 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1648 else
1649 freq = rx_status->freq;
1650
1651 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1652
1653 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1654 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001655
Johannes Berg05c914f2008-09-11 00:01:58 +02001656 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && elems->supp_rates &&
Emmanuel Grumbach8e1535d2008-09-03 23:42:20 +03001657 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
Emmanuel Grumbach8e1535d2008-09-03 23:42:20 +03001658 supp_rates = ieee80211_sta_get_rates(local, elems, band);
1659
Johannes Berg69e6c012008-09-08 11:05:08 +02001660 rcu_read_lock();
1661
Emmanuel Grumbach8e1535d2008-09-03 23:42:20 +03001662 sta = sta_info_get(local, mgmt->sa);
1663 if (sta) {
Johannes Berg881d9482009-01-21 15:13:48 +01001664 u32 prev_rates;
Emmanuel Grumbach8e1535d2008-09-03 23:42:20 +03001665
Johannes Berg323ce792008-09-11 02:45:11 +02001666 prev_rates = sta->sta.supp_rates[band];
Emmanuel Grumbach8e1535d2008-09-03 23:42:20 +03001667 /* make sure mandatory rates are always added */
Johannes Berg323ce792008-09-11 02:45:11 +02001668 sta->sta.supp_rates[band] = supp_rates |
Johannes Berg96dd22a2008-09-11 00:01:57 +02001669 ieee80211_mandatory_rates(local, band);
Emmanuel Grumbach8e1535d2008-09-03 23:42:20 +03001670
1671#ifdef CONFIG_MAC80211_IBSS_DEBUG
Johannes Berg323ce792008-09-11 02:45:11 +02001672 if (sta->sta.supp_rates[band] != prev_rates)
Emmanuel Grumbach8e1535d2008-09-03 23:42:20 +03001673 printk(KERN_DEBUG "%s: updated supp_rates set "
Johannes Berg0c68ae262008-10-27 15:56:10 -07001674 "for %pM based on beacon info (0x%llx | "
Emmanuel Grumbach8e1535d2008-09-03 23:42:20 +03001675 "0x%llx -> 0x%llx)\n",
Johannes Berg17741cd2008-09-11 00:02:02 +02001676 sdata->dev->name,
Johannes Berg0c68ae262008-10-27 15:56:10 -07001677 sta->sta.addr,
Emmanuel Grumbach8e1535d2008-09-03 23:42:20 +03001678 (unsigned long long) prev_rates,
1679 (unsigned long long) supp_rates,
Johannes Berg323ce792008-09-11 02:45:11 +02001680 (unsigned long long) sta->sta.supp_rates[band]);
Emmanuel Grumbach8e1535d2008-09-03 23:42:20 +03001681#endif
1682 } else {
Rami Rosenab1f5c02008-12-11 14:00:25 +02001683 ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates);
Jiri Bencf0706e82007-05-05 11:45:53 -07001684 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001685
Johannes Berg69e6c012008-09-08 11:05:08 +02001686 rcu_read_unlock();
1687 }
Johannes Bergd0709a62008-02-25 16:27:46 +01001688
Johannes Berg98c8fcc2008-09-08 17:44:26 +02001689 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1690 freq, beacon);
1691 if (!bss)
1692 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001693
Sujithc481ec92009-01-06 09:28:37 +05301694 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1695 (memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0)) {
1696 struct ieee80211_channel_sw_ie *sw_elem =
1697 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1698 ieee80211_process_chanswitch(sdata, sw_elem, bss);
1699 }
1700
Johannes Berg98c8fcc2008-09-08 17:44:26 +02001701 /* was just updated in ieee80211_bss_info_update */
1702 beacon_timestamp = bss->timestamp;
Daniel Drake56282212007-07-10 19:32:10 +02001703
Johannes Berg30b89b02008-04-16 17:43:20 +02001704 /*
1705 * In STA mode, the remaining parameters should not be overridden
1706 * by beacons because they're not necessarily accurate there.
1707 */
Johannes Berg05c914f2008-09-11 00:01:58 +02001708 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
Ron Rindjunsky9859b812008-08-09 03:02:19 +03001709 bss->last_probe_resp && beacon) {
Johannes Berg3e122be2008-07-09 14:40:34 +02001710 ieee80211_rx_bss_put(local, bss);
Johannes Berg30b89b02008-04-16 17:43:20 +02001711 return;
1712 }
1713
Bruno Randolf9d9bf772008-02-18 11:21:36 +09001714 /* check if we need to merge IBSS */
Johannes Berg05c914f2008-09-11 00:01:58 +02001715 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && beacon &&
Alina Friedrichsen65f0e6a2009-01-06 03:08:10 +01001716 (!(sdata->u.sta.flags & IEEE80211_STA_BSSID_SET)) &&
Johannes Bergfba4a1e2008-02-21 11:08:33 +01001717 bss->capability & WLAN_CAPABILITY_IBSS &&
Bruno Randolf9d9bf772008-02-18 11:21:36 +09001718 bss->freq == local->oper_channel->center_freq &&
Ester Kummerae6a44e2008-06-27 18:54:48 +03001719 elems->ssid_len == sdata->u.sta.ssid_len &&
1720 memcmp(elems->ssid, sdata->u.sta.ssid,
1721 sdata->u.sta.ssid_len) == 0) {
Bruno Randolf9d9bf772008-02-18 11:21:36 +09001722 if (rx_status->flag & RX_FLAG_TSFT) {
1723 /* in order for correct IBSS merging we need mactime
1724 *
1725 * since mactime is defined as the time the first data
1726 * symbol of the frame hits the PHY, and the timestamp
1727 * of the beacon is defined as "the time that the data
1728 * symbol containing the first bit of the timestamp is
1729 * transmitted to the PHY plus the transmitting STA’s
1730 * delays through its local PHY from the MAC-PHY
1731 * interface to its interface with the WM"
1732 * (802.11 11.1.2) - equals the time this bit arrives at
1733 * the receiver - we have to take into account the
1734 * offset between the two.
1735 * e.g: at 1 MBit that means mactime is 192 usec earlier
1736 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
1737 */
Jouni Malinen0fb8ca42008-12-12 14:38:33 +02001738 int rate;
1739 if (rx_status->flag & RX_FLAG_HT) {
1740 rate = 65; /* TODO: HT rates */
1741 } else {
1742 rate = local->hw.wiphy->bands[band]->
Bruno Randolf9d9bf772008-02-18 11:21:36 +09001743 bitrates[rx_status->rate_idx].bitrate;
Jouni Malinen0fb8ca42008-12-12 14:38:33 +02001744 }
Bruno Randolf9d9bf772008-02-18 11:21:36 +09001745 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
1746 } else if (local && local->ops && local->ops->get_tsf)
1747 /* second best option: get current TSF */
1748 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
1749 else
1750 /* can't merge without knowing the TSF */
1751 rx_timestamp = -1LLU;
1752#ifdef CONFIG_MAC80211_IBSS_DEBUG
Johannes Berg0c68ae262008-10-27 15:56:10 -07001753 printk(KERN_DEBUG "RX beacon SA=%pM BSSID="
1754 "%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
1755 mgmt->sa, mgmt->bssid,
Bruno Randolf9d9bf772008-02-18 11:21:36 +09001756 (unsigned long long)rx_timestamp,
1757 (unsigned long long)beacon_timestamp,
1758 (unsigned long long)(rx_timestamp - beacon_timestamp),
1759 jiffies);
1760#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1761 if (beacon_timestamp > rx_timestamp) {
John W. Linville576fdea2008-08-26 20:33:34 -04001762#ifdef CONFIG_MAC80211_IBSS_DEBUG
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001763 printk(KERN_DEBUG "%s: beacon TSF higher than "
Johannes Berg0c68ae262008-10-27 15:56:10 -07001764 "local TSF - IBSS merge with BSSID %pM\n",
1765 sdata->dev->name, mgmt->bssid);
Johannes Bergfba4a1e2008-02-21 11:08:33 +01001766#endif
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001767 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
Rami Rosenab1f5c02008-12-11 14:00:25 +02001768 ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates);
Bruno Randolf9d9bf772008-02-18 11:21:36 +09001769 }
1770 }
1771
Johannes Berg3e122be2008-07-09 14:40:34 +02001772 ieee80211_rx_bss_put(local, bss);
Jiri Bencf0706e82007-05-05 11:45:53 -07001773}
1774
1775
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001776static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001777 struct ieee80211_mgmt *mgmt,
1778 size_t len,
1779 struct ieee80211_rx_status *rx_status)
1780{
Ester Kummerae6a44e2008-06-27 18:54:48 +03001781 size_t baselen;
1782 struct ieee802_11_elems elems;
Ron Rindjunsky9859b812008-08-09 03:02:19 +03001783 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
Ester Kummerae6a44e2008-06-27 18:54:48 +03001784
Tomas Winkler8e7cdbb2008-08-03 14:32:01 +03001785 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1786 return; /* ignore ProbeResp to foreign address */
1787
Ester Kummerae6a44e2008-06-27 18:54:48 +03001788 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1789 if (baselen > len)
1790 return;
1791
1792 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1793 &elems);
1794
Johannes Berg98c8fcc2008-09-08 17:44:26 +02001795 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
Ron Rindjunsky9859b812008-08-09 03:02:19 +03001796
1797 /* direct probe may be part of the association flow */
1798 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1799 &ifsta->request)) {
1800 printk(KERN_DEBUG "%s direct probe responded\n",
1801 sdata->dev->name);
1802 ieee80211_authenticate(sdata, ifsta);
1803 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001804}
1805
1806
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001807static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001808 struct ieee80211_mgmt *mgmt,
1809 size_t len,
1810 struct ieee80211_rx_status *rx_status)
1811{
Jiri Bencf0706e82007-05-05 11:45:53 -07001812 struct ieee80211_if_sta *ifsta;
Jiri Bencf0706e82007-05-05 11:45:53 -07001813 size_t baselen;
1814 struct ieee802_11_elems elems;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001815 struct ieee80211_local *local = sdata->local;
Johannes Berg471b3ef2007-12-28 14:32:58 +01001816 u32 changed = 0;
Vivek Natarajana97b77b2008-12-23 18:39:02 -08001817 bool erp_valid, directed_tim, is_mc = false;
Johannes Berg7a5158e2008-10-08 10:59:33 +02001818 u8 erp_value = 0;
Jiri Bencf0706e82007-05-05 11:45:53 -07001819
Ester Kummerae6a44e2008-06-27 18:54:48 +03001820 /* Process beacon from the current BSS */
1821 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1822 if (baselen > len)
1823 return;
1824
1825 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1826
Johannes Berg98c8fcc2008-09-08 17:44:26 +02001827 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
Jiri Bencf0706e82007-05-05 11:45:53 -07001828
Johannes Berg05c914f2008-09-11 00:01:58 +02001829 if (sdata->vif.type != NL80211_IFTYPE_STATION)
Jiri Bencf0706e82007-05-05 11:45:53 -07001830 return;
1831 ifsta = &sdata->u.sta;
1832
Jiri Slabyd6f2da52007-08-28 17:01:54 -04001833 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
Jiri Bencf0706e82007-05-05 11:45:53 -07001834 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1835 return;
1836
Sujithc481ec92009-01-06 09:28:37 +05301837 if (rx_status->freq != local->hw.conf.channel->center_freq)
1838 return;
1839
Johannes Bergfe3fa822008-09-08 11:05:09 +02001840 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1841 elems.wmm_param_len);
1842
Johannes Berg4be8c382009-01-07 18:28:20 +01001843 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK &&
1844 local->hw.conf.flags & IEEE80211_CONF_PS) {
Vivek Natarajana97b77b2008-12-23 18:39:02 -08001845 directed_tim = check_tim(&elems, ifsta->aid, &is_mc);
1846
1847 if (directed_tim || is_mc) {
Johannes Berg4be8c382009-01-07 18:28:20 +01001848 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1849 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1850 ieee80211_send_nullfunc(local, sdata, 0);
Vivek Natarajana97b77b2008-12-23 18:39:02 -08001851 }
1852 }
Johannes Berg7a5158e2008-10-08 10:59:33 +02001853
1854 if (elems.erp_info && elems.erp_info_len >= 1) {
1855 erp_valid = true;
1856 erp_value = elems.erp_info[0];
1857 } else {
1858 erp_valid = false;
John W. Linville50c4afb2008-04-15 14:09:27 -04001859 }
Johannes Berg7a5158e2008-10-08 10:59:33 +02001860 changed |= ieee80211_handle_bss_capability(sdata,
1861 le16_to_cpu(mgmt->u.beacon.capab_info),
1862 erp_valid, erp_value);
Jiri Bencf0706e82007-05-05 11:45:53 -07001863
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001864
Johannes Bergae5eb022008-10-14 16:58:37 +02001865 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param) {
1866 struct sta_info *sta;
1867 struct ieee80211_supported_band *sband;
1868 u16 ap_ht_cap_flags;
1869
1870 rcu_read_lock();
1871
1872 sta = sta_info_get(local, ifsta->bssid);
1873 if (!sta) {
1874 rcu_read_unlock();
1875 return;
1876 }
1877
1878 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1879
1880 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1881 elems.ht_cap_elem, &sta->sta.ht_cap);
1882
1883 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1884
1885 rcu_read_unlock();
1886
1887 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1888 ap_ht_cap_flags);
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001889 }
1890
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001891 if (elems.country_elem) {
1892 /* Note we are only reviewing this on beacons
1893 * for the BSSID we are associated to */
1894 regulatory_hint_11d(local->hw.wiphy,
1895 elems.country_elem, elems.country_elem_len);
Vasanthakumar Thiagarajana8302de2009-01-09 18:14:15 +05301896
1897 /* TODO: IBSS also needs this */
1898 if (elems.pwr_constr_elem)
1899 ieee80211_handle_pwr_constr(sdata,
1900 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1901 elems.pwr_constr_elem,
1902 elems.pwr_constr_elem_len);
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001903 }
1904
Johannes Berg471b3ef2007-12-28 14:32:58 +01001905 ieee80211_bss_info_change_notify(sdata, changed);
Jiri Bencf0706e82007-05-05 11:45:53 -07001906}
1907
1908
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001909static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001910 struct ieee80211_if_sta *ifsta,
1911 struct ieee80211_mgmt *mgmt,
Rami Rosen504a71e2009-01-06 10:50:51 +02001912 size_t len)
Jiri Bencf0706e82007-05-05 11:45:53 -07001913{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001914 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -07001915 int tx_last_beacon;
1916 struct sk_buff *skb;
1917 struct ieee80211_mgmt *resp;
1918 u8 *pos, *end;
1919
Johannes Berg05c914f2008-09-11 00:01:58 +02001920 if (sdata->vif.type != NL80211_IFTYPE_ADHOC ||
Tomas Winkler48c2fc52008-08-06 14:22:01 +03001921 ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
Jiri Bencf0706e82007-05-05 11:45:53 -07001922 len < 24 + 2 || !ifsta->probe_resp)
1923 return;
1924
1925 if (local->ops->tx_last_beacon)
1926 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1927 else
1928 tx_last_beacon = 1;
1929
1930#ifdef CONFIG_MAC80211_IBSS_DEBUG
Johannes Berg0c68ae262008-10-27 15:56:10 -07001931 printk(KERN_DEBUG "%s: RX ProbeReq SA=%pM DA=%pM BSSID=%pM"
1932 " (tx_last_beacon=%d)\n",
1933 sdata->dev->name, mgmt->sa, mgmt->da,
1934 mgmt->bssid, tx_last_beacon);
Jiri Bencf0706e82007-05-05 11:45:53 -07001935#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1936
1937 if (!tx_last_beacon)
1938 return;
1939
1940 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1941 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1942 return;
1943
1944 end = ((u8 *) mgmt) + len;
1945 pos = mgmt->u.probe_req.variable;
1946 if (pos[0] != WLAN_EID_SSID ||
1947 pos + 2 + pos[1] > end) {
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001948#ifdef CONFIG_MAC80211_IBSS_DEBUG
1949 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
Johannes Berg0c68ae262008-10-27 15:56:10 -07001950 "from %pM\n",
1951 sdata->dev->name, mgmt->sa);
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001952#endif
Jiri Bencf0706e82007-05-05 11:45:53 -07001953 return;
1954 }
1955 if (pos[1] != 0 &&
1956 (pos[1] != ifsta->ssid_len ||
1957 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1958 /* Ignore ProbeReq for foreign SSID */
1959 return;
1960 }
1961
1962 /* Reply with ProbeResp */
Michael Wu0ec0b7a2007-07-27 15:43:24 +02001963 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
Jiri Bencf0706e82007-05-05 11:45:53 -07001964 if (!skb)
1965 return;
1966
1967 resp = (struct ieee80211_mgmt *) skb->data;
1968 memcpy(resp->da, mgmt->sa, ETH_ALEN);
1969#ifdef CONFIG_MAC80211_IBSS_DEBUG
Johannes Berg0c68ae262008-10-27 15:56:10 -07001970 printk(KERN_DEBUG "%s: Sending ProbeResp to %pM\n",
1971 sdata->dev->name, resp->da);
Jiri Bencf0706e82007-05-05 11:45:53 -07001972#endif /* CONFIG_MAC80211_IBSS_DEBUG */
Johannes Berge50db652008-09-09 15:07:09 +02001973 ieee80211_tx_skb(sdata, skb, 0);
Jiri Bencf0706e82007-05-05 11:45:53 -07001974}
1975
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001976void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
Jiri Bencf0706e82007-05-05 11:45:53 -07001977 struct ieee80211_rx_status *rx_status)
1978{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001979 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -07001980 struct ieee80211_if_sta *ifsta;
1981 struct ieee80211_mgmt *mgmt;
1982 u16 fc;
1983
1984 if (skb->len < 24)
1985 goto fail;
1986
Jiri Bencf0706e82007-05-05 11:45:53 -07001987 ifsta = &sdata->u.sta;
1988
1989 mgmt = (struct ieee80211_mgmt *) skb->data;
1990 fc = le16_to_cpu(mgmt->frame_control);
1991
1992 switch (fc & IEEE80211_FCTL_STYPE) {
1993 case IEEE80211_STYPE_PROBE_REQ:
1994 case IEEE80211_STYPE_PROBE_RESP:
1995 case IEEE80211_STYPE_BEACON:
1996 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1997 case IEEE80211_STYPE_AUTH:
1998 case IEEE80211_STYPE_ASSOC_RESP:
1999 case IEEE80211_STYPE_REASSOC_RESP:
2000 case IEEE80211_STYPE_DEAUTH:
2001 case IEEE80211_STYPE_DISASSOC:
2002 skb_queue_tail(&ifsta->skb_queue, skb);
2003 queue_work(local->hw.workqueue, &ifsta->work);
2004 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07002005 }
2006
2007 fail:
2008 kfree_skb(skb);
2009}
2010
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002011static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07002012 struct sk_buff *skb)
2013{
2014 struct ieee80211_rx_status *rx_status;
Jiri Bencf0706e82007-05-05 11:45:53 -07002015 struct ieee80211_if_sta *ifsta;
2016 struct ieee80211_mgmt *mgmt;
2017 u16 fc;
2018
Jiri Bencf0706e82007-05-05 11:45:53 -07002019 ifsta = &sdata->u.sta;
2020
2021 rx_status = (struct ieee80211_rx_status *) skb->cb;
2022 mgmt = (struct ieee80211_mgmt *) skb->data;
2023 fc = le16_to_cpu(mgmt->frame_control);
2024
2025 switch (fc & IEEE80211_FCTL_STYPE) {
2026 case IEEE80211_STYPE_PROBE_REQ:
Rami Rosen504a71e2009-01-06 10:50:51 +02002027 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len);
Jiri Bencf0706e82007-05-05 11:45:53 -07002028 break;
2029 case IEEE80211_STYPE_PROBE_RESP:
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002030 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
Jiri Bencf0706e82007-05-05 11:45:53 -07002031 break;
2032 case IEEE80211_STYPE_BEACON:
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002033 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
Jiri Bencf0706e82007-05-05 11:45:53 -07002034 break;
2035 case IEEE80211_STYPE_AUTH:
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002036 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
Jiri Bencf0706e82007-05-05 11:45:53 -07002037 break;
2038 case IEEE80211_STYPE_ASSOC_RESP:
Johannes Berg471b3ef2007-12-28 14:32:58 +01002039 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
Jiri Bencf0706e82007-05-05 11:45:53 -07002040 break;
2041 case IEEE80211_STYPE_REASSOC_RESP:
Johannes Berg471b3ef2007-12-28 14:32:58 +01002042 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
Jiri Bencf0706e82007-05-05 11:45:53 -07002043 break;
2044 case IEEE80211_STYPE_DEAUTH:
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002045 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
Jiri Bencf0706e82007-05-05 11:45:53 -07002046 break;
2047 case IEEE80211_STYPE_DISASSOC:
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002048 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
Jiri Bencf0706e82007-05-05 11:45:53 -07002049 break;
2050 }
2051
2052 kfree_skb(skb);
2053}
2054
2055
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002056static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
Jiri Bencf0706e82007-05-05 11:45:53 -07002057{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002058 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -07002059 int active = 0;
2060 struct sta_info *sta;
2061
Johannes Bergd0709a62008-02-25 16:27:46 +01002062 rcu_read_lock();
2063
2064 list_for_each_entry_rcu(sta, &local->sta_list, list) {
2065 if (sta->sdata == sdata &&
Jiri Bencf0706e82007-05-05 11:45:53 -07002066 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2067 jiffies)) {
2068 active++;
2069 break;
2070 }
2071 }
Johannes Bergd0709a62008-02-25 16:27:46 +01002072
2073 rcu_read_unlock();
Jiri Bencf0706e82007-05-05 11:45:53 -07002074
2075 return active;
2076}
2077
2078
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002079static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07002080 struct ieee80211_if_sta *ifsta)
2081{
2082 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2083
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002084 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
2085 if (ieee80211_sta_active_ibss(sdata))
Jiri Bencf0706e82007-05-05 11:45:53 -07002086 return;
2087
Alina Friedrichsen137f9f42009-01-06 02:49:07 +01002088 if ((sdata->u.sta.flags & IEEE80211_STA_BSSID_SET) &&
2089 (!(sdata->u.sta.flags & IEEE80211_STA_AUTO_CHANNEL_SEL)))
2090 return;
2091
Jiri Bencf0706e82007-05-05 11:45:53 -07002092 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002093 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
Johannes Bergc2b13452008-09-11 00:01:55 +02002094 ieee80211_request_scan(sdata, ifsta->ssid, ifsta->ssid_len);
Jiri Bencf0706e82007-05-05 11:45:53 -07002095}
2096
2097
Johannes Berg9c6bd792008-09-11 00:01:52 +02002098static void ieee80211_sta_timer(unsigned long data)
Jiri Bencf0706e82007-05-05 11:45:53 -07002099{
2100 struct ieee80211_sub_if_data *sdata =
2101 (struct ieee80211_sub_if_data *) data;
2102 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002103 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -07002104
2105 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2106 queue_work(local->hw.workqueue, &ifsta->work);
2107}
2108
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002109static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07002110 struct ieee80211_if_sta *ifsta)
2111{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002112 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -07002113
2114 if (local->ops->reset_tsf) {
2115 /* Reset own TSF to allow time synchronization work. */
2116 local->ops->reset_tsf(local_to_hw(local));
2117 }
2118
2119 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2120
2121
2122 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2123 ifsta->auth_alg = WLAN_AUTH_OPEN;
2124 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2125 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2126 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2127 ifsta->auth_alg = WLAN_AUTH_LEAP;
2128 else
2129 ifsta->auth_alg = WLAN_AUTH_OPEN;
Jiri Bencf0706e82007-05-05 11:45:53 -07002130 ifsta->auth_transaction = -1;
Jiri Slabyd6f2da52007-08-28 17:01:54 -04002131 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
Ron Rindjunsky6042a3e2008-08-08 01:50:46 +03002132 ifsta->assoc_scan_tries = 0;
Ron Rindjunsky9859b812008-08-09 03:02:19 +03002133 ifsta->direct_probe_tries = 0;
Ron Rindjunsky6042a3e2008-08-08 01:50:46 +03002134 ifsta->auth_tries = 0;
2135 ifsta->assoc_tries = 0;
Tomas Winkler24e64622008-09-08 17:33:40 +02002136 netif_tx_stop_all_queues(sdata->dev);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002137 netif_carrier_off(sdata->dev);
Jiri Bencf0706e82007-05-05 11:45:53 -07002138}
2139
2140
Jiri Bencf0706e82007-05-05 11:45:53 -07002141static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2142 const char *ssid, int ssid_len)
2143{
2144 int tmp, hidden_ssid;
2145
Michael Wu48225702007-10-19 17:14:36 -04002146 if (ssid_len == ifsta->ssid_len &&
2147 !memcmp(ifsta->ssid, ssid, ssid_len))
Jiri Bencf0706e82007-05-05 11:45:53 -07002148 return 1;
2149
Jiri Slabyd6f2da52007-08-28 17:01:54 -04002150 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
Jiri Bencf0706e82007-05-05 11:45:53 -07002151 return 0;
2152
2153 hidden_ssid = 1;
2154 tmp = ssid_len;
2155 while (tmp--) {
2156 if (ssid[tmp] != '\0') {
2157 hidden_ssid = 0;
2158 break;
2159 }
2160 }
2161
Fabio Rossicb3da8c2008-11-26 22:44:23 +01002162 if (hidden_ssid && (ifsta->ssid_len == ssid_len || ssid_len == 0))
Jiri Bencf0706e82007-05-05 11:45:53 -07002163 return 1;
2164
2165 if (ssid_len == 1 && ssid[0] == ' ')
2166 return 1;
2167
2168 return 0;
2169}
2170
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002171static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07002172 struct ieee80211_if_sta *ifsta)
2173{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002174 struct ieee80211_local *local = sdata->local;
Johannes Bergc2b13452008-09-11 00:01:55 +02002175 struct ieee80211_bss *bss;
Johannes Berg8318d782008-01-24 19:38:38 +01002176 struct ieee80211_supported_band *sband;
Jiri Bencf0706e82007-05-05 11:45:53 -07002177 u8 bssid[ETH_ALEN], *pos;
2178 int i;
Tomas Winkler167ad6f2008-05-21 18:17:05 +03002179 int ret;
Jiri Bencf0706e82007-05-05 11:45:53 -07002180
2181#if 0
2182 /* Easier testing, use fixed BSSID. */
2183 memset(bssid, 0xfe, ETH_ALEN);
2184#else
2185 /* Generate random, not broadcast, locally administered BSSID. Mix in
2186 * own MAC address to make sure that devices that do not have proper
2187 * random number generator get different BSSID. */
2188 get_random_bytes(bssid, ETH_ALEN);
2189 for (i = 0; i < ETH_ALEN; i++)
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002190 bssid[i] ^= sdata->dev->dev_addr[i];
Jiri Bencf0706e82007-05-05 11:45:53 -07002191 bssid[0] &= ~0x01;
2192 bssid[0] |= 0x02;
2193#endif
2194
Johannes Berg0c68ae262008-10-27 15:56:10 -07002195 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %pM\n",
2196 sdata->dev->name, bssid);
Jiri Bencf0706e82007-05-05 11:45:53 -07002197
Johannes Berg98c8fcc2008-09-08 17:44:26 +02002198 bss = ieee80211_rx_bss_add(local, bssid,
Johannes Berg8318d782008-01-24 19:38:38 +01002199 local->hw.conf.channel->center_freq,
John W. Linvillecffdd302007-10-05 14:23:27 -04002200 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
Jiri Bencf0706e82007-05-05 11:45:53 -07002201 if (!bss)
2202 return -ENOMEM;
2203
Johannes Berg8318d782008-01-24 19:38:38 +01002204 bss->band = local->hw.conf.channel->band;
2205 sband = local->hw.wiphy->bands[bss->band];
Jiri Bencf0706e82007-05-05 11:45:53 -07002206
2207 if (local->hw.conf.beacon_int == 0)
Tomas Winklerdc0ae302008-06-12 22:38:37 +03002208 local->hw.conf.beacon_int = 100;
Jiri Bencf0706e82007-05-05 11:45:53 -07002209 bss->beacon_int = local->hw.conf.beacon_int;
Jiri Bencf0706e82007-05-05 11:45:53 -07002210 bss->last_update = jiffies;
2211 bss->capability = WLAN_CAPABILITY_IBSS;
Johannes Berg988c0f72008-04-17 19:21:22 +02002212
2213 if (sdata->default_key)
Jiri Bencf0706e82007-05-05 11:45:53 -07002214 bss->capability |= WLAN_CAPABILITY_PRIVACY;
Johannes Berg988c0f72008-04-17 19:21:22 +02002215 else
Jiri Bencf0706e82007-05-05 11:45:53 -07002216 sdata->drop_unencrypted = 0;
Johannes Berg988c0f72008-04-17 19:21:22 +02002217
Johannes Berg8318d782008-01-24 19:38:38 +01002218 bss->supp_rates_len = sband->n_bitrates;
Jiri Bencf0706e82007-05-05 11:45:53 -07002219 pos = bss->supp_rates;
Johannes Berg8318d782008-01-24 19:38:38 +01002220 for (i = 0; i < sband->n_bitrates; i++) {
2221 int rate = sband->bitrates[i].bitrate;
Jiri Bencf0706e82007-05-05 11:45:53 -07002222 *pos++ = (u8) (rate / 5);
2223 }
2224
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002225 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
Johannes Berg3e122be2008-07-09 14:40:34 +02002226 ieee80211_rx_bss_put(local, bss);
Tomas Winkler167ad6f2008-05-21 18:17:05 +03002227 return ret;
Jiri Bencf0706e82007-05-05 11:45:53 -07002228}
2229
2230
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002231static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07002232 struct ieee80211_if_sta *ifsta)
2233{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002234 struct ieee80211_local *local = sdata->local;
Johannes Bergc2b13452008-09-11 00:01:55 +02002235 struct ieee80211_bss *bss;
Jiri Bencf0706e82007-05-05 11:45:53 -07002236 int found = 0;
2237 u8 bssid[ETH_ALEN];
2238 int active_ibss;
2239
2240 if (ifsta->ssid_len == 0)
2241 return -EINVAL;
2242
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002243 active_ibss = ieee80211_sta_active_ibss(sdata);
Jiri Bencf0706e82007-05-05 11:45:53 -07002244#ifdef CONFIG_MAC80211_IBSS_DEBUG
2245 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002246 sdata->dev->name, active_ibss);
Jiri Bencf0706e82007-05-05 11:45:53 -07002247#endif /* CONFIG_MAC80211_IBSS_DEBUG */
Johannes Bergc2b13452008-09-11 00:01:55 +02002248 spin_lock_bh(&local->bss_lock);
2249 list_for_each_entry(bss, &local->bss_list, list) {
Jiri Bencf0706e82007-05-05 11:45:53 -07002250 if (ifsta->ssid_len != bss->ssid_len ||
2251 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2252 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2253 continue;
2254#ifdef CONFIG_MAC80211_IBSS_DEBUG
Johannes Berg0c68ae262008-10-27 15:56:10 -07002255 printk(KERN_DEBUG " bssid=%pM found\n", bss->bssid);
Jiri Bencf0706e82007-05-05 11:45:53 -07002256#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2257 memcpy(bssid, bss->bssid, ETH_ALEN);
2258 found = 1;
2259 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2260 break;
2261 }
Johannes Bergc2b13452008-09-11 00:01:55 +02002262 spin_unlock_bh(&local->bss_lock);
Jiri Bencf0706e82007-05-05 11:45:53 -07002263
2264#ifdef CONFIG_MAC80211_IBSS_DEBUG
Vladimir Koutny6e438292008-07-07 14:23:01 +02002265 if (found)
Johannes Berg0c68ae262008-10-27 15:56:10 -07002266 printk(KERN_DEBUG " sta_find_ibss: selected %pM current "
2267 "%pM\n", bssid, ifsta->bssid);
Jiri Bencf0706e82007-05-05 11:45:53 -07002268#endif /* CONFIG_MAC80211_IBSS_DEBUG */
Daniel Drake80693ce2008-07-19 23:31:17 +01002269
2270 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
Tomas Winkler167ad6f2008-05-21 18:17:05 +03002271 int ret;
Daniel Drake80693ce2008-07-19 23:31:17 +01002272 int search_freq;
2273
2274 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2275 search_freq = bss->freq;
2276 else
2277 search_freq = local->hw.conf.channel->center_freq;
2278
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002279 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
Daniel Drake80693ce2008-07-19 23:31:17 +01002280 ifsta->ssid, ifsta->ssid_len);
2281 if (!bss)
2282 goto dont_join;
2283
Johannes Berg0c68ae262008-10-27 15:56:10 -07002284 printk(KERN_DEBUG "%s: Selected IBSS BSSID %pM"
Jiri Bencf0706e82007-05-05 11:45:53 -07002285 " based on configured SSID\n",
Johannes Berg0c68ae262008-10-27 15:56:10 -07002286 sdata->dev->name, bssid);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002287 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
Johannes Berg3e122be2008-07-09 14:40:34 +02002288 ieee80211_rx_bss_put(local, bss);
Tomas Winkler167ad6f2008-05-21 18:17:05 +03002289 return ret;
Jiri Bencf0706e82007-05-05 11:45:53 -07002290 }
Daniel Drake80693ce2008-07-19 23:31:17 +01002291
2292dont_join:
Jiri Bencf0706e82007-05-05 11:45:53 -07002293#ifdef CONFIG_MAC80211_IBSS_DEBUG
2294 printk(KERN_DEBUG " did not try to join ibss\n");
2295#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2296
2297 /* Selected IBSS not found in current scan results - try to scan */
Tomas Winkler48c2fc52008-08-06 14:22:01 +03002298 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002299 !ieee80211_sta_active_ibss(sdata)) {
Jiri Bencf0706e82007-05-05 11:45:53 -07002300 mod_timer(&ifsta->timer, jiffies +
2301 IEEE80211_IBSS_MERGE_INTERVAL);
2302 } else if (time_after(jiffies, local->last_scan_completed +
2303 IEEE80211_SCAN_INTERVAL)) {
2304 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002305 "join\n", sdata->dev->name);
Johannes Bergc2b13452008-09-11 00:01:55 +02002306 return ieee80211_request_scan(sdata, ifsta->ssid,
Jiri Bencf0706e82007-05-05 11:45:53 -07002307 ifsta->ssid_len);
Tomas Winkler48c2fc52008-08-06 14:22:01 +03002308 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
Jiri Bencf0706e82007-05-05 11:45:53 -07002309 int interval = IEEE80211_SCAN_INTERVAL;
2310
2311 if (time_after(jiffies, ifsta->ibss_join_req +
2312 IEEE80211_IBSS_JOIN_TIMEOUT)) {
Jiri Slabyd6f2da52007-08-28 17:01:54 -04002313 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
Johannes Berg8318d782008-01-24 19:38:38 +01002314 (!(local->oper_channel->flags &
2315 IEEE80211_CHAN_NO_IBSS)))
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002316 return ieee80211_sta_create_ibss(sdata, ifsta);
Jiri Slabyd6f2da52007-08-28 17:01:54 -04002317 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
Johannes Berg8318d782008-01-24 19:38:38 +01002318 printk(KERN_DEBUG "%s: IBSS not allowed on"
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002319 " %d MHz\n", sdata->dev->name,
Johannes Berg8318d782008-01-24 19:38:38 +01002320 local->hw.conf.channel->center_freq);
Jiri Bencf0706e82007-05-05 11:45:53 -07002321 }
2322
2323 /* No IBSS found - decrease scan interval and continue
2324 * scanning. */
2325 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2326 }
2327
Tomas Winkler48c2fc52008-08-06 14:22:01 +03002328 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
Jiri Bencf0706e82007-05-05 11:45:53 -07002329 mod_timer(&ifsta->timer, jiffies + interval);
2330 return 0;
2331 }
2332
2333 return 0;
2334}
2335
2336
Johannes Berg60f8b392008-09-08 17:44:22 +02002337static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
2338 struct ieee80211_if_sta *ifsta)
2339{
2340 struct ieee80211_local *local = sdata->local;
Johannes Bergc2b13452008-09-11 00:01:55 +02002341 struct ieee80211_bss *bss, *selected = NULL;
Johannes Berg60f8b392008-09-08 17:44:22 +02002342 int top_rssi = 0, freq;
2343
Johannes Bergc2b13452008-09-11 00:01:55 +02002344 spin_lock_bh(&local->bss_lock);
Johannes Berg60f8b392008-09-08 17:44:22 +02002345 freq = local->oper_channel->center_freq;
Johannes Bergc2b13452008-09-11 00:01:55 +02002346 list_for_each_entry(bss, &local->bss_list, list) {
Johannes Berg60f8b392008-09-08 17:44:22 +02002347 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2348 continue;
2349
2350 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2351 IEEE80211_STA_AUTO_BSSID_SEL |
2352 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
2353 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2354 !!sdata->default_key))
2355 continue;
2356
2357 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2358 bss->freq != freq)
2359 continue;
2360
2361 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2362 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2363 continue;
2364
2365 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2366 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2367 continue;
2368
2369 if (!selected || top_rssi < bss->signal) {
2370 selected = bss;
2371 top_rssi = bss->signal;
2372 }
2373 }
2374 if (selected)
2375 atomic_inc(&selected->users);
Johannes Bergc2b13452008-09-11 00:01:55 +02002376 spin_unlock_bh(&local->bss_lock);
Johannes Berg60f8b392008-09-08 17:44:22 +02002377
2378 if (selected) {
2379 ieee80211_set_freq(sdata, selected->freq);
2380 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2381 ieee80211_sta_set_ssid(sdata, selected->ssid,
2382 selected->ssid_len);
2383 ieee80211_sta_set_bssid(sdata, selected->bssid);
Johannes Bergb079ada2008-09-09 09:32:59 +02002384 ieee80211_sta_def_wmm_params(sdata, selected);
Jouni Malinenfdfacf02009-01-08 13:32:05 +02002385 if (sdata->u.sta.mfp == IEEE80211_MFP_REQUIRED)
2386 sdata->u.sta.flags |= IEEE80211_STA_MFP_ENABLED;
2387 else
2388 sdata->u.sta.flags &= ~IEEE80211_STA_MFP_ENABLED;
Johannes Berg60f8b392008-09-08 17:44:22 +02002389
2390 /* Send out direct probe if no probe resp was received or
2391 * the one we have is outdated
2392 */
2393 if (!selected->last_probe_resp ||
2394 time_after(jiffies, selected->last_probe_resp
2395 + IEEE80211_SCAN_RESULT_EXPIRE))
2396 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2397 else
2398 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2399
2400 ieee80211_rx_bss_put(local, selected);
2401 ieee80211_sta_reset_auth(sdata, ifsta);
2402 return 0;
2403 } else {
2404 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2405 ifsta->assoc_scan_tries++;
2406 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
Johannes Bergc2b13452008-09-11 00:01:55 +02002407 ieee80211_start_scan(sdata, NULL, 0);
Johannes Berg60f8b392008-09-08 17:44:22 +02002408 else
Johannes Bergc2b13452008-09-11 00:01:55 +02002409 ieee80211_start_scan(sdata, ifsta->ssid,
Johannes Berg60f8b392008-09-08 17:44:22 +02002410 ifsta->ssid_len);
2411 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2412 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2413 } else
2414 ifsta->state = IEEE80211_STA_MLME_DISABLED;
2415 }
2416 return -1;
2417}
2418
2419
Johannes Berg9c6bd792008-09-11 00:01:52 +02002420static void ieee80211_sta_work(struct work_struct *work)
Johannes Berg60f8b392008-09-08 17:44:22 +02002421{
2422 struct ieee80211_sub_if_data *sdata =
2423 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2424 struct ieee80211_local *local = sdata->local;
2425 struct ieee80211_if_sta *ifsta;
2426 struct sk_buff *skb;
2427
2428 if (!netif_running(sdata->dev))
2429 return;
2430
Johannes Bergc2b13452008-09-11 00:01:55 +02002431 if (local->sw_scanning || local->hw_scanning)
Johannes Berg60f8b392008-09-08 17:44:22 +02002432 return;
2433
Johannes Berg05c914f2008-09-11 00:01:58 +02002434 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION &&
2435 sdata->vif.type != NL80211_IFTYPE_ADHOC))
Johannes Berg60f8b392008-09-08 17:44:22 +02002436 return;
2437 ifsta = &sdata->u.sta;
2438
2439 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2440 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2441
Johannes Berg60f8b392008-09-08 17:44:22 +02002442 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2443 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2444 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
2445 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
Johannes Bergc2b13452008-09-11 00:01:55 +02002446 ieee80211_start_scan(sdata, ifsta->scan_ssid,
2447 ifsta->scan_ssid_len);
Johannes Berg60f8b392008-09-08 17:44:22 +02002448 return;
2449 }
2450
2451 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2452 if (ieee80211_sta_config_auth(sdata, ifsta))
2453 return;
2454 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2455 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2456 return;
2457
2458 switch (ifsta->state) {
2459 case IEEE80211_STA_MLME_DISABLED:
2460 break;
2461 case IEEE80211_STA_MLME_DIRECT_PROBE:
2462 ieee80211_direct_probe(sdata, ifsta);
2463 break;
2464 case IEEE80211_STA_MLME_AUTHENTICATE:
2465 ieee80211_authenticate(sdata, ifsta);
2466 break;
2467 case IEEE80211_STA_MLME_ASSOCIATE:
2468 ieee80211_associate(sdata, ifsta);
2469 break;
2470 case IEEE80211_STA_MLME_ASSOCIATED:
2471 ieee80211_associated(sdata, ifsta);
2472 break;
2473 case IEEE80211_STA_MLME_IBSS_SEARCH:
2474 ieee80211_sta_find_ibss(sdata, ifsta);
2475 break;
2476 case IEEE80211_STA_MLME_IBSS_JOINED:
2477 ieee80211_sta_merge_ibss(sdata, ifsta);
2478 break;
Johannes Berg60f8b392008-09-08 17:44:22 +02002479 default:
2480 WARN_ON(1);
2481 break;
2482 }
2483
2484 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
2485 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2486 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2487
2488 ieee80211_set_disassoc(sdata, ifsta, false, true,
2489 WLAN_REASON_UNSPECIFIED);
2490 }
2491}
Johannes Berg0a51b272008-09-08 17:44:25 +02002492
Johannes Berga1678f82008-09-11 00:01:47 +02002493static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2494{
Johannes Berg05c914f2008-09-11 00:01:58 +02002495 if (sdata->vif.type == NL80211_IFTYPE_STATION)
Johannes Berg7c950692008-09-11 00:01:48 +02002496 queue_work(sdata->local->hw.workqueue,
2497 &sdata->u.sta.work);
Johannes Berga1678f82008-09-11 00:01:47 +02002498}
2499
Johannes Berg9c6bd792008-09-11 00:01:52 +02002500/* interface setup */
2501void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2502{
2503 struct ieee80211_if_sta *ifsta;
2504
2505 ifsta = &sdata->u.sta;
2506 INIT_WORK(&ifsta->work, ieee80211_sta_work);
Sujithc481ec92009-01-06 09:28:37 +05302507 INIT_WORK(&ifsta->chswitch_work, ieee80211_chswitch_work);
Johannes Berg9c6bd792008-09-11 00:01:52 +02002508 setup_timer(&ifsta->timer, ieee80211_sta_timer,
2509 (unsigned long) sdata);
Sujithc481ec92009-01-06 09:28:37 +05302510 setup_timer(&ifsta->chswitch_timer, ieee80211_chswitch_timer,
2511 (unsigned long) sdata);
Johannes Berg9c6bd792008-09-11 00:01:52 +02002512 skb_queue_head_init(&ifsta->skb_queue);
2513
2514 ifsta->capab = WLAN_CAPABILITY_ESS;
2515 ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2516 IEEE80211_AUTH_ALG_SHARED_KEY;
2517 ifsta->flags |= IEEE80211_STA_CREATE_IBSS |
2518 IEEE80211_STA_AUTO_BSSID_SEL |
2519 IEEE80211_STA_AUTO_CHANNEL_SEL;
2520 if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4)
2521 ifsta->flags |= IEEE80211_STA_WMM_ENABLED;
2522}
2523
2524/*
2525 * Add a new IBSS station, will also be called by the RX code when,
2526 * in IBSS mode, receiving a frame from a yet-unknown station, hence
2527 * must be callable in atomic context.
2528 */
2529struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
Johannes Berg881d9482009-01-21 15:13:48 +01002530 u8 *bssid,u8 *addr, u32 supp_rates)
Johannes Berg9c6bd792008-09-11 00:01:52 +02002531{
2532 struct ieee80211_local *local = sdata->local;
2533 struct sta_info *sta;
Johannes Berg9c6bd792008-09-11 00:01:52 +02002534 int band = local->hw.conf.channel->band;
2535
2536 /* TODO: Could consider removing the least recently used entry and
2537 * allow new one to be added. */
2538 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
2539 if (net_ratelimit()) {
2540 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
Johannes Berg0c68ae262008-10-27 15:56:10 -07002541 "entry %pM\n", sdata->dev->name, addr);
Johannes Berg9c6bd792008-09-11 00:01:52 +02002542 }
2543 return NULL;
2544 }
2545
2546 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
2547 return NULL;
2548
2549#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Johannes Berg0c68ae262008-10-27 15:56:10 -07002550 printk(KERN_DEBUG "%s: Adding new IBSS station %pM (dev=%s)\n",
2551 wiphy_name(local->hw.wiphy), addr, sdata->dev->name);
Johannes Berg9c6bd792008-09-11 00:01:52 +02002552#endif
2553
2554 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
2555 if (!sta)
2556 return NULL;
2557
2558 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
2559
2560 /* make sure mandatory rates are always added */
Johannes Berg323ce792008-09-11 02:45:11 +02002561 sta->sta.supp_rates[band] = supp_rates |
Johannes Berg96dd22a2008-09-11 00:01:57 +02002562 ieee80211_mandatory_rates(local, band);
Johannes Berg9c6bd792008-09-11 00:01:52 +02002563
Johannes Berg4b7679a2008-09-18 18:14:18 +02002564 rate_control_rate_init(sta);
Johannes Berg9c6bd792008-09-11 00:01:52 +02002565
2566 if (sta_info_insert(sta))
2567 return NULL;
2568
2569 return sta;
2570}
2571
2572/* configuration hooks */
2573void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
2574 struct ieee80211_if_sta *ifsta)
2575{
2576 struct ieee80211_local *local = sdata->local;
2577
Johannes Berg05c914f2008-09-11 00:01:58 +02002578 if (sdata->vif.type != NL80211_IFTYPE_STATION)
Johannes Berg9c6bd792008-09-11 00:01:52 +02002579 return;
2580
2581 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2582 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2583 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2584 IEEE80211_STA_AUTO_SSID_SEL))) {
2585
2586 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED)
2587 ieee80211_set_disassoc(sdata, ifsta, true, true,
2588 WLAN_REASON_DEAUTH_LEAVING);
2589
2590 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2591 queue_work(local->hw.workqueue, &ifsta->work);
2592 }
2593}
2594
2595int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2596{
2597 struct ieee80211_if_sta *ifsta;
Johannes Berg9c6bd792008-09-11 00:01:52 +02002598
2599 if (len > IEEE80211_MAX_SSID_LEN)
2600 return -EINVAL;
2601
2602 ifsta = &sdata->u.sta;
2603
2604 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
2605 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
2606 memcpy(ifsta->ssid, ssid, len);
2607 ifsta->ssid_len = len;
2608 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
Johannes Berg9c6bd792008-09-11 00:01:52 +02002609 }
2610
2611 if (len)
2612 ifsta->flags |= IEEE80211_STA_SSID_SET;
2613 else
2614 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
2615
Johannes Berg05c914f2008-09-11 00:01:58 +02002616 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
Johannes Berg9c6bd792008-09-11 00:01:52 +02002617 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
2618 ifsta->ibss_join_req = jiffies;
2619 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2620 return ieee80211_sta_find_ibss(sdata, ifsta);
2621 }
2622
2623 return 0;
2624}
2625
2626int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2627{
2628 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2629 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2630 *len = ifsta->ssid_len;
2631 return 0;
2632}
2633
2634int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2635{
2636 struct ieee80211_if_sta *ifsta;
2637 int res;
Alina Friedrichsen0efcdfd2009-01-06 02:41:35 +01002638 bool valid;
Johannes Berg9c6bd792008-09-11 00:01:52 +02002639
2640 ifsta = &sdata->u.sta;
Alina Friedrichsen0efcdfd2009-01-06 02:41:35 +01002641 valid = is_valid_ether_addr(bssid);
Johannes Berg9c6bd792008-09-11 00:01:52 +02002642
2643 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
Alina Friedrichsen0efcdfd2009-01-06 02:41:35 +01002644 if(valid)
2645 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2646 else
2647 memset(ifsta->bssid, 0, ETH_ALEN);
Johannes Berg9c6bd792008-09-11 00:01:52 +02002648 res = 0;
2649 /*
2650 * Hack! See also ieee80211_sta_set_ssid.
2651 */
2652 if (netif_running(sdata->dev))
2653 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
2654 if (res) {
2655 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2656 "the low-level driver\n", sdata->dev->name);
2657 return res;
2658 }
2659 }
2660
Alina Friedrichsen0efcdfd2009-01-06 02:41:35 +01002661 if (valid)
Johannes Berg9c6bd792008-09-11 00:01:52 +02002662 ifsta->flags |= IEEE80211_STA_BSSID_SET;
2663 else
2664 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
2665
2666 return 0;
2667}
2668
2669int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
2670{
2671 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2672
2673 kfree(ifsta->extra_ie);
2674 if (len == 0) {
2675 ifsta->extra_ie = NULL;
2676 ifsta->extra_ie_len = 0;
2677 return 0;
2678 }
2679 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
2680 if (!ifsta->extra_ie) {
2681 ifsta->extra_ie_len = 0;
2682 return -ENOMEM;
2683 }
2684 memcpy(ifsta->extra_ie, ie, len);
2685 ifsta->extra_ie_len = len;
2686 return 0;
2687}
2688
2689int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2690{
2691 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2692
2693 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2694 sdata->dev->name, reason);
2695
Johannes Berg05c914f2008-09-11 00:01:58 +02002696 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
2697 sdata->vif.type != NL80211_IFTYPE_ADHOC)
Johannes Berg9c6bd792008-09-11 00:01:52 +02002698 return -EINVAL;
2699
2700 ieee80211_set_disassoc(sdata, ifsta, true, true, reason);
2701 return 0;
2702}
2703
2704int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2705{
2706 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2707
2708 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2709 sdata->dev->name, reason);
2710
Johannes Berg05c914f2008-09-11 00:01:58 +02002711 if (sdata->vif.type != NL80211_IFTYPE_STATION)
Johannes Berg9c6bd792008-09-11 00:01:52 +02002712 return -EINVAL;
2713
2714 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
2715 return -1;
2716
2717 ieee80211_set_disassoc(sdata, ifsta, false, true, reason);
2718 return 0;
2719}
2720
2721/* scan finished notification */
Johannes Berg0a51b272008-09-08 17:44:25 +02002722void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2723{
2724 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2725 struct ieee80211_if_sta *ifsta;
2726
Johannes Berg05c914f2008-09-11 00:01:58 +02002727 if (sdata && sdata->vif.type == NL80211_IFTYPE_ADHOC) {
Johannes Berg0a51b272008-09-08 17:44:25 +02002728 ifsta = &sdata->u.sta;
2729 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
2730 (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) &&
2731 !ieee80211_sta_active_ibss(sdata)))
2732 ieee80211_sta_find_ibss(sdata, ifsta);
2733 }
Johannes Berga1678f82008-09-11 00:01:47 +02002734
2735 /* Restart STA timers */
2736 rcu_read_lock();
2737 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2738 ieee80211_restart_sta_timer(sdata);
2739 rcu_read_unlock();
Johannes Berg0a51b272008-09-08 17:44:25 +02002740}
Kalle Valo520eb822008-12-18 23:35:27 +02002741
2742void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
2743{
2744 struct ieee80211_local *local =
2745 container_of(work, struct ieee80211_local,
2746 dynamic_ps_disable_work);
2747
2748 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2749 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2750 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2751 }
2752
2753 ieee80211_wake_queues_by_reason(&local->hw,
2754 IEEE80211_QUEUE_STOP_REASON_PS);
2755}
2756
2757void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
2758{
2759 struct ieee80211_local *local =
2760 container_of(work, struct ieee80211_local,
2761 dynamic_ps_enable_work);
Vivek Natarajana97b77b2008-12-23 18:39:02 -08002762 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
Kalle Valo520eb822008-12-18 23:35:27 +02002763
2764 if (local->hw.conf.flags & IEEE80211_CONF_PS)
2765 return;
2766
Johannes Berg4be8c382009-01-07 18:28:20 +01002767 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
2768 ieee80211_send_nullfunc(local, sdata, 1);
Kalle Valo520eb822008-12-18 23:35:27 +02002769
Johannes Berg4be8c382009-01-07 18:28:20 +01002770 local->hw.conf.flags |= IEEE80211_CONF_PS;
Kalle Valo520eb822008-12-18 23:35:27 +02002771 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2772}
2773
2774void ieee80211_dynamic_ps_timer(unsigned long data)
2775{
2776 struct ieee80211_local *local = (void *) data;
2777
2778 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
2779}