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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
Johannes Berg00d3f142009-02-10 21:26:00 +010058 pos = bss->cbss.information_elements;
Jouni Malinen43ac2ca2008-08-15 22:21:27 +030059 if (pos == NULL)
60 return NULL;
Johannes Berg00d3f142009-02-10 21:26:00 +010061 end = pos + bss->cbss.len_information_elements;
Jouni Malinen43ac2ca2008-08-15 22:21:27 +030062
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) {
Johannes Berg00d3f142009-02-10 21:26:00 +0100292 if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
Johannes Berg9ac19a92008-09-09 10:57:09 +0200293 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
Johannes Berg00d3f142009-02-10 21:26:00 +0100303 if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
Johannes Berg9ac19a92008-09-09 10:57:09 +0200304 (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
Kalle Valo572e0012009-02-10 17:09:31 +0200514void ieee80211_send_pspoll(struct ieee80211_local *local,
515 struct ieee80211_sub_if_data *sdata)
516{
517 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
518 struct ieee80211_pspoll *pspoll;
519 struct sk_buff *skb;
520 u16 fc;
521
522 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
523 if (!skb) {
524 printk(KERN_DEBUG "%s: failed to allocate buffer for "
525 "pspoll frame\n", sdata->dev->name);
526 return;
527 }
528 skb_reserve(skb, local->hw.extra_tx_headroom);
529
530 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
531 memset(pspoll, 0, sizeof(*pspoll));
532 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
533 pspoll->frame_control = cpu_to_le16(fc);
534 pspoll->aid = cpu_to_le16(ifsta->aid);
535
536 /* aid in PS-Poll has its two MSBs each set to 1 */
537 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
538
539 memcpy(pspoll->bssid, ifsta->bssid, ETH_ALEN);
540 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
541
542 ieee80211_tx_skb(sdata, skb, 0);
543
544 return;
545}
546
Johannes Berg60f8b392008-09-08 17:44:22 +0200547/* MLME */
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200548static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
Johannes Berg99cf5f52009-02-10 21:25:56 +0100549 const size_t supp_rates_len,
550 const u8 *supp_rates)
Vladimir Koutnye2839d82008-03-18 21:14:07 +0100551{
Vladimir Koutnye2839d82008-03-18 21:14:07 +0100552 struct ieee80211_local *local = sdata->local;
553 int i, have_higher_than_11mbit = 0;
554
Vladimir Koutnye2839d82008-03-18 21:14:07 +0100555 /* cf. IEEE 802.11 9.2.12 */
Johannes Berg99cf5f52009-02-10 21:25:56 +0100556 for (i = 0; i < supp_rates_len; i++)
557 if ((supp_rates[i] & 0x7f) * 5 > 110)
Vladimir Koutnye2839d82008-03-18 21:14:07 +0100558 have_higher_than_11mbit = 1;
559
560 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
561 have_higher_than_11mbit)
562 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
563 else
564 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
565
Johannes Berg3d35f7c2008-09-09 12:54:11 +0200566 ieee80211_set_wmm_default(sdata);
Vladimir Koutnye2839d82008-03-18 21:14:07 +0100567}
568
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200569static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
Jiri Bencf0706e82007-05-05 11:45:53 -0700570 struct ieee80211_if_sta *ifsta,
571 u8 *wmm_param, size_t wmm_param_len)
572{
Jiri Bencf0706e82007-05-05 11:45:53 -0700573 struct ieee80211_tx_queue_params params;
574 size_t left;
575 int count;
576 u8 *pos;
577
Johannes Berg3434fbd2008-05-03 00:59:37 +0200578 if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
579 return;
580
581 if (!wmm_param)
582 return;
583
Jiri Bencf0706e82007-05-05 11:45:53 -0700584 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
585 return;
586 count = wmm_param[6] & 0x0f;
587 if (count == ifsta->wmm_last_param_set)
588 return;
589 ifsta->wmm_last_param_set = count;
590
591 pos = wmm_param + 8;
592 left = wmm_param_len - 8;
593
594 memset(&params, 0, sizeof(params));
595
596 if (!local->ops->conf_tx)
597 return;
598
599 local->wmm_acm = 0;
600 for (; left >= 4; left -= 4, pos += 4) {
601 int aci = (pos[0] >> 5) & 0x03;
602 int acm = (pos[0] >> 4) & 0x01;
603 int queue;
604
605 switch (aci) {
606 case 1:
Johannes Berge100bb62008-04-30 18:51:21 +0200607 queue = 3;
Johannes Berg988c0f72008-04-17 19:21:22 +0200608 if (acm)
Jiri Bencf0706e82007-05-05 11:45:53 -0700609 local->wmm_acm |= BIT(0) | BIT(3);
Jiri Bencf0706e82007-05-05 11:45:53 -0700610 break;
611 case 2:
Johannes Berge100bb62008-04-30 18:51:21 +0200612 queue = 1;
Johannes Berg988c0f72008-04-17 19:21:22 +0200613 if (acm)
Jiri Bencf0706e82007-05-05 11:45:53 -0700614 local->wmm_acm |= BIT(4) | BIT(5);
Jiri Bencf0706e82007-05-05 11:45:53 -0700615 break;
616 case 3:
Johannes Berge100bb62008-04-30 18:51:21 +0200617 queue = 0;
Johannes Berg988c0f72008-04-17 19:21:22 +0200618 if (acm)
Jiri Bencf0706e82007-05-05 11:45:53 -0700619 local->wmm_acm |= BIT(6) | BIT(7);
Jiri Bencf0706e82007-05-05 11:45:53 -0700620 break;
621 case 0:
622 default:
Johannes Berge100bb62008-04-30 18:51:21 +0200623 queue = 2;
Johannes Berg988c0f72008-04-17 19:21:22 +0200624 if (acm)
Jiri Bencf0706e82007-05-05 11:45:53 -0700625 local->wmm_acm |= BIT(1) | BIT(2);
Jiri Bencf0706e82007-05-05 11:45:53 -0700626 break;
627 }
628
629 params.aifs = pos[0] & 0x0f;
630 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
631 params.cw_min = ecw2cw(pos[1] & 0x0f);
Johannes Bergf434b2d2008-07-10 11:22:31 +0200632 params.txop = get_unaligned_le16(pos + 2);
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200633#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Jiri Bencf0706e82007-05-05 11:45:53 -0700634 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
Johannes Berg3330d7b2008-02-10 16:49:38 +0100635 "cWmin=%d cWmax=%d txop=%d\n",
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200636 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
Johannes Berg3330d7b2008-02-10 16:49:38 +0100637 params.cw_max, params.txop);
638#endif
Jiri Bencf0706e82007-05-05 11:45:53 -0700639 /* TODO: handle ACM (block TX, fallback to next lowest allowed
640 * AC for now) */
641 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
642 printk(KERN_DEBUG "%s: failed to set TX queue "
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200643 "parameters for queue %d\n", local->mdev->name, queue);
Jiri Bencf0706e82007-05-05 11:45:53 -0700644 }
645 }
646}
647
Kalle Valo1fb36062009-02-10 17:09:24 +0200648static bool ieee80211_check_tim(struct ieee802_11_elems *elems, u16 aid)
Vivek Natarajana97b77b2008-12-23 18:39:02 -0800649{
650 u8 mask;
651 u8 index, indexn1, indexn2;
652 struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *) elems->tim;
653
654 aid &= 0x3fff;
655 index = aid / 8;
656 mask = 1 << (aid & 7);
657
Vivek Natarajana97b77b2008-12-23 18:39:02 -0800658 indexn1 = tim->bitmap_ctrl & 0xfe;
659 indexn2 = elems->tim_len + indexn1 - 4;
660
661 if (index < indexn1 || index > indexn2)
662 return false;
663
664 index -= indexn1;
665
666 return !!(tim->virtual_map[index] & mask);
667}
668
Johannes Berg7a5158e2008-10-08 10:59:33 +0200669static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
670 u16 capab, bool erp_valid, u8 erp)
Daniel Drake56282212007-07-10 19:32:10 +0200671{
Johannes Bergbda39332008-10-11 01:51:51 +0200672 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
Tomas Winklerebd74482008-07-01 10:44:50 +0300673#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Daniel Drake56282212007-07-10 19:32:10 +0200674 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
Tomas Winklerebd74482008-07-01 10:44:50 +0300675#endif
Johannes Berg471b3ef2007-12-28 14:32:58 +0100676 u32 changed = 0;
Johannes Berg7a5158e2008-10-08 10:59:33 +0200677 bool use_protection;
678 bool use_short_preamble;
679 bool use_short_slot;
680
681 if (erp_valid) {
682 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
683 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
684 } else {
685 use_protection = false;
686 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
687 }
688
689 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
Daniel Drake56282212007-07-10 19:32:10 +0200690
Johannes Berg471b3ef2007-12-28 14:32:58 +0100691 if (use_protection != bss_conf->use_cts_prot) {
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200692#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Daniel Drake56282212007-07-10 19:32:10 +0200693 if (net_ratelimit()) {
Johannes Berg0c68ae262008-10-27 15:56:10 -0700694 printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
Johannes Berg471b3ef2007-12-28 14:32:58 +0100695 sdata->dev->name,
Daniel Drake56282212007-07-10 19:32:10 +0200696 use_protection ? "enabled" : "disabled",
Johannes Berg0c68ae262008-10-27 15:56:10 -0700697 ifsta->bssid);
Daniel Drake56282212007-07-10 19:32:10 +0200698 }
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200699#endif
Johannes Berg471b3ef2007-12-28 14:32:58 +0100700 bss_conf->use_cts_prot = use_protection;
701 changed |= BSS_CHANGED_ERP_CTS_PROT;
Daniel Drake56282212007-07-10 19:32:10 +0200702 }
Daniel Drake7e9ed182007-07-27 15:43:24 +0200703
Vladimir Koutnyd43c7b32008-03-31 17:05:03 +0200704 if (use_short_preamble != bss_conf->use_short_preamble) {
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200705#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Daniel Drake7e9ed182007-07-27 15:43:24 +0200706 if (net_ratelimit()) {
707 printk(KERN_DEBUG "%s: switched to %s barker preamble"
Johannes Berg0c68ae262008-10-27 15:56:10 -0700708 " (BSSID=%pM)\n",
Johannes Berg471b3ef2007-12-28 14:32:58 +0100709 sdata->dev->name,
Vladimir Koutnyd43c7b32008-03-31 17:05:03 +0200710 use_short_preamble ? "short" : "long",
Johannes Berg0c68ae262008-10-27 15:56:10 -0700711 ifsta->bssid);
Daniel Drake7e9ed182007-07-27 15:43:24 +0200712 }
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200713#endif
Vladimir Koutnyd43c7b32008-03-31 17:05:03 +0200714 bss_conf->use_short_preamble = use_short_preamble;
Johannes Berg471b3ef2007-12-28 14:32:58 +0100715 changed |= BSS_CHANGED_ERP_PREAMBLE;
Daniel Drake7e9ed182007-07-27 15:43:24 +0200716 }
Daniel Draked9430a32007-07-27 15:43:24 +0200717
Johannes Berg7a5158e2008-10-08 10:59:33 +0200718 if (use_short_slot != bss_conf->use_short_slot) {
719#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
720 if (net_ratelimit()) {
Christian Lamparter391429c2009-01-18 02:24:15 +0100721 printk(KERN_DEBUG "%s: switched to %s slot time"
722 " (BSSID=%pM)\n",
Johannes Berg7a5158e2008-10-08 10:59:33 +0200723 sdata->dev->name,
724 use_short_slot ? "short" : "long",
725 ifsta->bssid);
726 }
727#endif
728 bss_conf->use_short_slot = use_short_slot;
729 changed |= BSS_CHANGED_ERP_SLOT;
John W. Linville50c4afb2008-04-15 14:09:27 -0400730 }
731
732 return changed;
733}
734
Tomas Winklerf5e5bf22008-09-08 17:33:39 +0200735static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata,
736 struct ieee80211_if_sta *ifsta)
737{
738 union iwreq_data wrqu;
739 memset(&wrqu, 0, sizeof(wrqu));
740 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
741 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
742 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
743 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
744}
745
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200746static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -0700747 struct ieee80211_if_sta *ifsta)
748{
Linus Torvalds74af0252008-09-05 12:38:09 -0700749 char *buf;
750 size_t len;
751 int i;
Jiri Bencf0706e82007-05-05 11:45:53 -0700752 union iwreq_data wrqu;
753
Linus Torvalds74af0252008-09-05 12:38:09 -0700754 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
755 return;
756
757 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
758 ifsta->assocresp_ies_len), GFP_KERNEL);
759 if (!buf)
760 return;
761
762 len = sprintf(buf, "ASSOCINFO(");
Jiri Bencf0706e82007-05-05 11:45:53 -0700763 if (ifsta->assocreq_ies) {
Linus Torvalds74af0252008-09-05 12:38:09 -0700764 len += sprintf(buf + len, "ReqIEs=");
765 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
766 len += sprintf(buf + len, "%02x",
767 ifsta->assocreq_ies[i]);
768 }
Jiri Bencf0706e82007-05-05 11:45:53 -0700769 }
770 if (ifsta->assocresp_ies) {
Linus Torvalds74af0252008-09-05 12:38:09 -0700771 if (ifsta->assocreq_ies)
772 len += sprintf(buf + len, " ");
773 len += sprintf(buf + len, "RespIEs=");
774 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
775 len += sprintf(buf + len, "%02x",
776 ifsta->assocresp_ies[i]);
777 }
Jiri Bencf0706e82007-05-05 11:45:53 -0700778 }
Linus Torvalds74af0252008-09-05 12:38:09 -0700779 len += sprintf(buf + len, ")");
780
781 if (len > IW_CUSTOM_MAX) {
782 len = sprintf(buf, "ASSOCRESPIE=");
783 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
784 len += sprintf(buf + len, "%02x",
785 ifsta->assocresp_ies[i]);
786 }
787 }
788
John W. Linvillead788b52008-10-01 15:45:02 -0400789 if (len <= IW_CUSTOM_MAX) {
790 memset(&wrqu, 0, sizeof(wrqu));
791 wrqu.data.length = len;
792 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
793 }
Linus Torvalds74af0252008-09-05 12:38:09 -0700794
795 kfree(buf);
Jiri Bencf0706e82007-05-05 11:45:53 -0700796}
797
798
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200799static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
Johannes Bergae5eb022008-10-14 16:58:37 +0200800 struct ieee80211_if_sta *ifsta,
801 u32 bss_info_changed)
Jiri Bencf0706e82007-05-05 11:45:53 -0700802{
Johannes Berg471b3ef2007-12-28 14:32:58 +0100803 struct ieee80211_local *local = sdata->local;
Tomas Winkler38668c02008-03-28 16:33:32 -0700804 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
Jiri Bencf0706e82007-05-05 11:45:53 -0700805
Johannes Bergc2b13452008-09-11 00:01:55 +0200806 struct ieee80211_bss *bss;
Jiri Slabyd6f2da52007-08-28 17:01:54 -0400807
Johannes Bergae5eb022008-10-14 16:58:37 +0200808 bss_info_changed |= BSS_CHANGED_ASSOC;
Tomas Winklerf5e5bf22008-09-08 17:33:39 +0200809 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
Jiri Slabyd6f2da52007-08-28 17:01:54 -0400810
Tomas Winklerf5e5bf22008-09-08 17:33:39 +0200811 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
812 conf->channel->center_freq,
813 ifsta->ssid, ifsta->ssid_len);
814 if (bss) {
815 /* set timing information */
Johannes Berg00d3f142009-02-10 21:26:00 +0100816 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
817 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
Johannes Bergbda39332008-10-11 01:51:51 +0200818 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
Tomas Winkler21c0cbe2008-03-28 16:33:34 -0700819
Johannes Bergae5eb022008-10-14 16:58:37 +0200820 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
Johannes Berg00d3f142009-02-10 21:26:00 +0100821 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
Tomas Winkler21c0cbe2008-03-28 16:33:34 -0700822
Tomas Winklerf5e5bf22008-09-08 17:33:39 +0200823 ieee80211_rx_bss_put(local, bss);
Jiri Bencf0706e82007-05-05 11:45:53 -0700824 }
Johannes Berg471b3ef2007-12-28 14:32:58 +0100825
Tomas Winklerf5e5bf22008-09-08 17:33:39 +0200826 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
827 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
828 ieee80211_sta_send_associnfo(sdata, ifsta);
829
830 ifsta->last_probe = jiffies;
831 ieee80211_led_assoc(local, 1);
832
Johannes Bergbda39332008-10-11 01:51:51 +0200833 sdata->vif.bss_conf.assoc = 1;
Johannes Berg96dd22a2008-09-11 00:01:57 +0200834 /*
835 * For now just always ask the driver to update the basic rateset
836 * when we have associated, we aren't checking whether it actually
837 * changed or not.
838 */
Johannes Bergae5eb022008-10-14 16:58:37 +0200839 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
840 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
Guy Cohen8db93692008-07-03 19:56:13 +0300841
Johannes Berg4be8c382009-01-07 18:28:20 +0100842 if (local->powersave) {
843 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) &&
844 local->hw.conf.dynamic_ps_timeout > 0) {
Kalle Valo520eb822008-12-18 23:35:27 +0200845 mod_timer(&local->dynamic_ps_timer, jiffies +
Johannes Berg46f2c4b2009-01-06 18:13:18 +0100846 msecs_to_jiffies(
847 local->hw.conf.dynamic_ps_timeout));
Johannes Berg4be8c382009-01-07 18:28:20 +0100848 } else {
849 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
850 ieee80211_send_nullfunc(local, sdata, 1);
Kalle Valo520eb822008-12-18 23:35:27 +0200851 conf->flags |= IEEE80211_CONF_PS;
Johannes Berg4be8c382009-01-07 18:28:20 +0100852 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
Kalle Valo520eb822008-12-18 23:35:27 +0200853 }
Kalle Valoe0cb6862008-12-18 23:35:13 +0200854 }
855
Tomas Winkler24e64622008-09-08 17:33:40 +0200856 netif_tx_start_all_queues(sdata->dev);
Tomas Winklerf5e5bf22008-09-08 17:33:39 +0200857 netif_carrier_on(sdata->dev);
Guy Cohen8db93692008-07-03 19:56:13 +0300858
Tomas Winklerf5e5bf22008-09-08 17:33:39 +0200859 ieee80211_sta_send_apinfo(sdata, ifsta);
Jiri Bencf0706e82007-05-05 11:45:53 -0700860}
861
Ron Rindjunsky9859b812008-08-09 03:02:19 +0300862static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
863 struct ieee80211_if_sta *ifsta)
864{
Ron Rindjunsky9859b812008-08-09 03:02:19 +0300865 ifsta->direct_probe_tries++;
866 if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
Johannes Berg0c68ae262008-10-27 15:56:10 -0700867 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
868 sdata->dev->name, ifsta->bssid);
Ron Rindjunsky9859b812008-08-09 03:02:19 +0300869 ifsta->state = IEEE80211_STA_MLME_DISABLED;
Johannes Berg4a68ec52008-10-16 21:44:44 +0200870 ieee80211_sta_send_apinfo(sdata, ifsta);
Vasanthakumar Thiagarajan7a947082009-02-04 18:28:48 +0530871
872 /*
873 * Most likely AP is not in the range so remove the
874 * bss information associated to the AP
875 */
876 ieee80211_rx_bss_remove(sdata, ifsta->bssid,
877 sdata->local->hw.conf.channel->center_freq,
878 ifsta->ssid, ifsta->ssid_len);
Ron Rindjunsky9859b812008-08-09 03:02:19 +0300879 return;
880 }
881
Johannes Berg0c68ae262008-10-27 15:56:10 -0700882 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
883 sdata->dev->name, ifsta->bssid,
Ron Rindjunsky9859b812008-08-09 03:02:19 +0300884 ifsta->direct_probe_tries);
885
886 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
887
888 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request);
889
890 /* Direct probe is sent to broadcast address as some APs
891 * will not answer to direct packet in unassociated state.
892 */
893 ieee80211_send_probe_req(sdata, NULL,
894 ifsta->ssid, ifsta->ssid_len);
895
896 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
897}
898
Jiri Bencf0706e82007-05-05 11:45:53 -0700899
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200900static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -0700901 struct ieee80211_if_sta *ifsta)
902{
903 ifsta->auth_tries++;
904 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
Johannes Berg0c68ae262008-10-27 15:56:10 -0700905 printk(KERN_DEBUG "%s: authentication with AP %pM"
Jiri Bencf0706e82007-05-05 11:45:53 -0700906 " timed out\n",
Johannes Berg0c68ae262008-10-27 15:56:10 -0700907 sdata->dev->name, ifsta->bssid);
Tomas Winkler48c2fc52008-08-06 14:22:01 +0300908 ifsta->state = IEEE80211_STA_MLME_DISABLED;
Johannes Berg4a68ec52008-10-16 21:44:44 +0200909 ieee80211_sta_send_apinfo(sdata, ifsta);
Vasanthakumar Thiagarajan7a947082009-02-04 18:28:48 +0530910 ieee80211_rx_bss_remove(sdata, ifsta->bssid,
911 sdata->local->hw.conf.channel->center_freq,
912 ifsta->ssid, ifsta->ssid_len);
Jiri Bencf0706e82007-05-05 11:45:53 -0700913 return;
914 }
915
Tomas Winkler48c2fc52008-08-06 14:22:01 +0300916 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
Johannes Berg0c68ae262008-10-27 15:56:10 -0700917 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
918 sdata->dev->name, ifsta->bssid);
Jiri Bencf0706e82007-05-05 11:45:53 -0700919
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200920 ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
Jiri Bencf0706e82007-05-05 11:45:53 -0700921
922 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
923}
924
Vivek Natarajan5925d972008-11-21 22:19:50 -0800925/*
926 * The disassoc 'reason' argument can be either our own reason
927 * if self disconnected or a reason code from the AP.
928 */
Tomas Winkleraa458d12008-09-09 00:32:12 +0300929static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
930 struct ieee80211_if_sta *ifsta, bool deauth,
931 bool self_disconnected, u16 reason)
932{
933 struct ieee80211_local *local = sdata->local;
934 struct sta_info *sta;
Kalle Valoe0cb6862008-12-18 23:35:13 +0200935 u32 changed = 0, config_changed = 0;
Tomas Winkleraa458d12008-09-09 00:32:12 +0300936
937 rcu_read_lock();
938
939 sta = sta_info_get(local, ifsta->bssid);
940 if (!sta) {
941 rcu_read_unlock();
942 return;
943 }
944
945 if (deauth) {
946 ifsta->direct_probe_tries = 0;
947 ifsta->auth_tries = 0;
948 }
949 ifsta->assoc_scan_tries = 0;
950 ifsta->assoc_tries = 0;
951
Tomas Winkler24e64622008-09-08 17:33:40 +0200952 netif_tx_stop_all_queues(sdata->dev);
Tomas Winkleraa458d12008-09-09 00:32:12 +0300953 netif_carrier_off(sdata->dev);
954
Johannes Berg2dace102009-02-10 21:25:52 +0100955 ieee80211_sta_tear_down_BA_sessions(sta);
Tomas Winkleraa458d12008-09-09 00:32:12 +0300956
957 if (self_disconnected) {
958 if (deauth)
Johannes Bergef422bc2008-09-09 10:58:25 +0200959 ieee80211_send_deauth_disassoc(sdata,
960 IEEE80211_STYPE_DEAUTH, reason);
Tomas Winkleraa458d12008-09-09 00:32:12 +0300961 else
Johannes Bergef422bc2008-09-09 10:58:25 +0200962 ieee80211_send_deauth_disassoc(sdata,
963 IEEE80211_STYPE_DISASSOC, reason);
Tomas Winkleraa458d12008-09-09 00:32:12 +0300964 }
965
Tomas Winklerf5e5bf22008-09-08 17:33:39 +0200966 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
967 changed |= ieee80211_reset_erp_info(sdata);
968
Tomas Winklerf5e5bf22008-09-08 17:33:39 +0200969 ieee80211_led_assoc(local, 0);
Johannes Bergae5eb022008-10-14 16:58:37 +0200970 changed |= BSS_CHANGED_ASSOC;
971 sdata->vif.bss_conf.assoc = false;
Tomas Winklerf5e5bf22008-09-08 17:33:39 +0200972
973 ieee80211_sta_send_apinfo(sdata, ifsta);
Tomas Winkleraa458d12008-09-09 00:32:12 +0300974
Vasanthakumar Thiagarajan7a947082009-02-04 18:28:48 +0530975 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
Tomas Winkleraa458d12008-09-09 00:32:12 +0300976 ifsta->state = IEEE80211_STA_MLME_DISABLED;
Vasanthakumar Thiagarajan7a947082009-02-04 18:28:48 +0530977 ieee80211_rx_bss_remove(sdata, ifsta->bssid,
978 sdata->local->hw.conf.channel->center_freq,
979 ifsta->ssid, ifsta->ssid_len);
980 }
Tomas Winkleraa458d12008-09-09 00:32:12 +0300981
Tomas Winkleraa458d12008-09-09 00:32:12 +0300982 rcu_read_unlock();
983
Johannes Berg47979382009-01-07 10:13:27 +0100984 /* channel(_type) changes are handled by ieee80211_hw_config */
Sujith094d05d2008-12-12 11:57:43 +0530985 local->oper_channel_type = NL80211_CHAN_NO_HT;
Johannes Bergae5eb022008-10-14 16:58:37 +0200986
Vasanthakumar Thiagarajana8302de2009-01-09 18:14:15 +0530987 local->power_constr_level = 0;
988
Kalle Valo520eb822008-12-18 23:35:27 +0200989 del_timer_sync(&local->dynamic_ps_timer);
990 cancel_work_sync(&local->dynamic_ps_enable_work);
991
Kalle Valoe0cb6862008-12-18 23:35:13 +0200992 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
993 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
994 config_changed |= IEEE80211_CONF_CHANGE_PS;
995 }
996
997 ieee80211_hw_config(local, config_changed);
Johannes Bergae5eb022008-10-14 16:58:37 +0200998 ieee80211_bss_info_change_notify(sdata, changed);
Tomas Winkler8e268e42008-11-25 13:05:44 +0200999
1000 rcu_read_lock();
1001
1002 sta = sta_info_get(local, ifsta->bssid);
1003 if (!sta) {
1004 rcu_read_unlock();
1005 return;
1006 }
1007
1008 sta_info_unlink(&sta);
1009
1010 rcu_read_unlock();
1011
1012 sta_info_destroy(sta);
Tomas Winkleraa458d12008-09-09 00:32:12 +03001013}
Jiri Bencf0706e82007-05-05 11:45:53 -07001014
Johannes Berg9ac19a92008-09-09 10:57:09 +02001015static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
1016{
1017 if (!sdata || !sdata->default_key ||
1018 sdata->default_key->conf.alg != ALG_WEP)
1019 return 0;
1020 return 1;
1021}
1022
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001023static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001024 struct ieee80211_if_sta *ifsta)
1025{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001026 struct ieee80211_local *local = sdata->local;
Johannes Bergc2b13452008-09-11 00:01:55 +02001027 struct ieee80211_bss *bss;
Johannes Berg5b98b1f2007-11-03 13:11:10 +00001028 int bss_privacy;
1029 int wep_privacy;
1030 int privacy_invoked;
Jiri Bencf0706e82007-05-05 11:45:53 -07001031
Johannes Berg5b98b1f2007-11-03 13:11:10 +00001032 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
Jiri Bencf0706e82007-05-05 11:45:53 -07001033 return 0;
1034
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001035 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
Johannes Berg8318d782008-01-24 19:38:38 +01001036 local->hw.conf.channel->center_freq,
John W. Linvillecffdd302007-10-05 14:23:27 -04001037 ifsta->ssid, ifsta->ssid_len);
Jiri Bencf0706e82007-05-05 11:45:53 -07001038 if (!bss)
1039 return 0;
1040
Johannes Berg00d3f142009-02-10 21:26:00 +01001041 bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001042 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
Johannes Berg5b98b1f2007-11-03 13:11:10 +00001043 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
Jiri Bencf0706e82007-05-05 11:45:53 -07001044
Johannes Berg3e122be2008-07-09 14:40:34 +02001045 ieee80211_rx_bss_put(local, bss);
Jiri Bencf0706e82007-05-05 11:45:53 -07001046
Johannes Berg5b98b1f2007-11-03 13:11:10 +00001047 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
1048 return 0;
1049
1050 return 1;
Jiri Bencf0706e82007-05-05 11:45:53 -07001051}
1052
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001053static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001054 struct ieee80211_if_sta *ifsta)
1055{
1056 ifsta->assoc_tries++;
1057 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
Johannes Berg0c68ae262008-10-27 15:56:10 -07001058 printk(KERN_DEBUG "%s: association with AP %pM"
Jiri Bencf0706e82007-05-05 11:45:53 -07001059 " timed out\n",
Johannes Berg0c68ae262008-10-27 15:56:10 -07001060 sdata->dev->name, ifsta->bssid);
Tomas Winkler48c2fc52008-08-06 14:22:01 +03001061 ifsta->state = IEEE80211_STA_MLME_DISABLED;
Johannes Berg4a68ec52008-10-16 21:44:44 +02001062 ieee80211_sta_send_apinfo(sdata, ifsta);
Vasanthakumar Thiagarajan7a947082009-02-04 18:28:48 +05301063 ieee80211_rx_bss_remove(sdata, ifsta->bssid,
1064 sdata->local->hw.conf.channel->center_freq,
1065 ifsta->ssid, ifsta->ssid_len);
Jiri Bencf0706e82007-05-05 11:45:53 -07001066 return;
1067 }
1068
Tomas Winkler48c2fc52008-08-06 14:22:01 +03001069 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
Johannes Berg0c68ae262008-10-27 15:56:10 -07001070 printk(KERN_DEBUG "%s: associate with AP %pM\n",
1071 sdata->dev->name, ifsta->bssid);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001072 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
Jiri Bencf0706e82007-05-05 11:45:53 -07001073 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001074 "mixed-cell disabled - abort association\n", sdata->dev->name);
Tomas Winkler48c2fc52008-08-06 14:22:01 +03001075 ifsta->state = IEEE80211_STA_MLME_DISABLED;
Jiri Bencf0706e82007-05-05 11:45:53 -07001076 return;
1077 }
1078
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001079 ieee80211_send_assoc(sdata, ifsta);
Jiri Bencf0706e82007-05-05 11:45:53 -07001080
1081 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1082}
1083
1084
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001085static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001086 struct ieee80211_if_sta *ifsta)
1087{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001088 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -07001089 struct sta_info *sta;
1090 int disassoc;
1091
1092 /* TODO: start monitoring current AP signal quality and number of
1093 * missed beacons. Scan other channels every now and then and search
1094 * for better APs. */
1095 /* TODO: remove expired BSSes */
1096
Tomas Winkler48c2fc52008-08-06 14:22:01 +03001097 ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
Jiri Bencf0706e82007-05-05 11:45:53 -07001098
Johannes Bergd0709a62008-02-25 16:27:46 +01001099 rcu_read_lock();
1100
Jiri Bencf0706e82007-05-05 11:45:53 -07001101 sta = sta_info_get(local, ifsta->bssid);
1102 if (!sta) {
Johannes Berg0c68ae262008-10-27 15:56:10 -07001103 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
1104 sdata->dev->name, ifsta->bssid);
Jiri Bencf0706e82007-05-05 11:45:53 -07001105 disassoc = 1;
1106 } else {
1107 disassoc = 0;
1108 if (time_after(jiffies,
1109 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
Jiri Slabyd6f2da52007-08-28 17:01:54 -04001110 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
Jiri Bencf0706e82007-05-05 11:45:53 -07001111 printk(KERN_DEBUG "%s: No ProbeResp from "
Johannes Berg0c68ae262008-10-27 15:56:10 -07001112 "current AP %pM - assume out of "
Jiri Bencf0706e82007-05-05 11:45:53 -07001113 "range\n",
Johannes Berg0c68ae262008-10-27 15:56:10 -07001114 sdata->dev->name, ifsta->bssid);
Jiri Bencf0706e82007-05-05 11:45:53 -07001115 disassoc = 1;
Jiri Slabyd6f2da52007-08-28 17:01:54 -04001116 } else
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001117 ieee80211_send_probe_req(sdata, ifsta->bssid,
Johannes Berg4dfe51e2008-09-19 05:10:34 +02001118 ifsta->ssid,
1119 ifsta->ssid_len);
Jiri Slabyd6f2da52007-08-28 17:01:54 -04001120 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
Jiri Bencf0706e82007-05-05 11:45:53 -07001121 } else {
Jiri Slabyd6f2da52007-08-28 17:01:54 -04001122 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
Jiri Bencf0706e82007-05-05 11:45:53 -07001123 if (time_after(jiffies, ifsta->last_probe +
1124 IEEE80211_PROBE_INTERVAL)) {
1125 ifsta->last_probe = jiffies;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001126 ieee80211_send_probe_req(sdata, ifsta->bssid,
Jiri Bencf0706e82007-05-05 11:45:53 -07001127 ifsta->ssid,
1128 ifsta->ssid_len);
1129 }
1130 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001131 }
Johannes Bergd0709a62008-02-25 16:27:46 +01001132
1133 rcu_read_unlock();
1134
Vasanthakumar Thiagarajan7a947082009-02-04 18:28:48 +05301135 if (disassoc)
Tomas Winkleraa458d12008-09-09 00:32:12 +03001136 ieee80211_set_disassoc(sdata, ifsta, true, true,
1137 WLAN_REASON_PREV_AUTH_NOT_VALID);
Vasanthakumar Thiagarajan7a947082009-02-04 18:28:48 +05301138 else
Jiri Bencf0706e82007-05-05 11:45:53 -07001139 mod_timer(&ifsta->timer, jiffies +
1140 IEEE80211_MONITORING_INTERVAL);
Jiri Bencf0706e82007-05-05 11:45:53 -07001141}
1142
1143
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001144static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001145 struct ieee80211_if_sta *ifsta)
1146{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001147 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
Jiri Slabyd6f2da52007-08-28 17:01:54 -04001148 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001149 ieee80211_associate(sdata, ifsta);
Jiri Bencf0706e82007-05-05 11:45:53 -07001150}
1151
1152
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001153static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001154 struct ieee80211_if_sta *ifsta,
1155 struct ieee80211_mgmt *mgmt,
1156 size_t len)
1157{
1158 u8 *pos;
1159 struct ieee802_11_elems elems;
1160
Jiri Bencf0706e82007-05-05 11:45:53 -07001161 pos = mgmt->u.auth.variable;
John W. Linville67a4cce2007-10-12 16:40:37 -04001162 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001163 if (!elems.challenge)
Jiri Bencf0706e82007-05-05 11:45:53 -07001164 return;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001165 ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
Jiri Bencf0706e82007-05-05 11:45:53 -07001166 elems.challenge_len + 2, 1);
1167}
1168
Johannes Bergfe3d2c32009-02-10 21:26:03 +01001169static void ieee80211_rx_mgmt_auth_ibss(struct ieee80211_sub_if_data *sdata,
1170 struct ieee80211_if_sta *ifsta,
1171 struct ieee80211_mgmt *mgmt,
1172 size_t len)
1173{
1174 u16 auth_alg, auth_transaction, status_code;
1175
1176 if (len < 24 + 6)
1177 return;
1178
1179 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1180 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1181 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1182
1183 /*
1184 * IEEE 802.11 standard does not require authentication in IBSS
1185 * networks and most implementations do not seem to use it.
1186 * However, try to reply to authentication attempts if someone
1187 * has actually implemented this.
1188 */
1189 if (auth_alg == WLAN_AUTH_OPEN && auth_transaction == 1)
1190 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
1191}
1192
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001193static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001194 struct ieee80211_if_sta *ifsta,
1195 struct ieee80211_mgmt *mgmt,
1196 size_t len)
1197{
Jiri Bencf0706e82007-05-05 11:45:53 -07001198 u16 auth_alg, auth_transaction, status_code;
1199
Johannes Bergfe3d2c32009-02-10 21:26:03 +01001200 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE)
Jiri Bencf0706e82007-05-05 11:45:53 -07001201 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001202
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001203 if (len < 24 + 6)
Jiri Bencf0706e82007-05-05 11:45:53 -07001204 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001205
Johannes Bergfe3d2c32009-02-10 21:26:03 +01001206 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
Jiri Bencf0706e82007-05-05 11:45:53 -07001207 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001208
Johannes Bergfe3d2c32009-02-10 21:26:03 +01001209 if (memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
Jiri Bencf0706e82007-05-05 11:45:53 -07001210 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001211
1212 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1213 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1214 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1215
Jiri Bencf0706e82007-05-05 11:45:53 -07001216 if (auth_alg != ifsta->auth_alg ||
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001217 auth_transaction != ifsta->auth_transaction)
Jiri Bencf0706e82007-05-05 11:45:53 -07001218 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001219
1220 if (status_code != WLAN_STATUS_SUCCESS) {
Jiri Bencf0706e82007-05-05 11:45:53 -07001221 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1222 u8 algs[3];
1223 const int num_algs = ARRAY_SIZE(algs);
1224 int i, pos;
1225 algs[0] = algs[1] = algs[2] = 0xff;
1226 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1227 algs[0] = WLAN_AUTH_OPEN;
1228 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1229 algs[1] = WLAN_AUTH_SHARED_KEY;
1230 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1231 algs[2] = WLAN_AUTH_LEAP;
1232 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1233 pos = 0;
1234 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1235 pos = 1;
1236 else
1237 pos = 2;
1238 for (i = 0; i < num_algs; i++) {
1239 pos++;
1240 if (pos >= num_algs)
1241 pos = 0;
1242 if (algs[pos] == ifsta->auth_alg ||
1243 algs[pos] == 0xff)
1244 continue;
1245 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001246 !ieee80211_sta_wep_configured(sdata))
Jiri Bencf0706e82007-05-05 11:45:53 -07001247 continue;
1248 ifsta->auth_alg = algs[pos];
Jiri Bencf0706e82007-05-05 11:45:53 -07001249 break;
1250 }
1251 }
1252 return;
1253 }
1254
1255 switch (ifsta->auth_alg) {
1256 case WLAN_AUTH_OPEN:
1257 case WLAN_AUTH_LEAP:
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001258 ieee80211_auth_completed(sdata, ifsta);
Jiri Bencf0706e82007-05-05 11:45:53 -07001259 break;
1260 case WLAN_AUTH_SHARED_KEY:
1261 if (ifsta->auth_transaction == 4)
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001262 ieee80211_auth_completed(sdata, ifsta);
Jiri Bencf0706e82007-05-05 11:45:53 -07001263 else
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001264 ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
Jiri Bencf0706e82007-05-05 11:45:53 -07001265 break;
1266 }
1267}
1268
1269
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001270static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001271 struct ieee80211_if_sta *ifsta,
1272 struct ieee80211_mgmt *mgmt,
1273 size_t len)
1274{
1275 u16 reason_code;
1276
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001277 if (len < 24 + 2)
Jiri Bencf0706e82007-05-05 11:45:53 -07001278 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001279
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001280 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
Jiri Bencf0706e82007-05-05 11:45:53 -07001281 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001282
1283 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1284
Johannes Berg988c0f72008-04-17 19:21:22 +02001285 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
Zhu Yi97c8b012008-10-28 15:58:31 +08001286 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1287 sdata->dev->name, reason_code);
Jiri Bencf0706e82007-05-05 11:45:53 -07001288
Tomas Winkler48c2fc52008-08-06 14:22:01 +03001289 if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1290 ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
1291 ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
Ron Rindjunsky9859b812008-08-09 03:02:19 +03001292 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
Jiri Bencf0706e82007-05-05 11:45:53 -07001293 mod_timer(&ifsta->timer, jiffies +
1294 IEEE80211_RETRY_AUTH_INTERVAL);
1295 }
1296
Tomas Winkleraa458d12008-09-09 00:32:12 +03001297 ieee80211_set_disassoc(sdata, ifsta, true, false, 0);
Jiri Slabyd6f2da52007-08-28 17:01:54 -04001298 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
Jiri Bencf0706e82007-05-05 11:45:53 -07001299}
1300
1301
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001302static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001303 struct ieee80211_if_sta *ifsta,
1304 struct ieee80211_mgmt *mgmt,
1305 size_t len)
1306{
1307 u16 reason_code;
1308
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001309 if (len < 24 + 2)
Jiri Bencf0706e82007-05-05 11:45:53 -07001310 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001311
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001312 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
Jiri Bencf0706e82007-05-05 11:45:53 -07001313 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001314
1315 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1316
Jiri Slabyd6f2da52007-08-28 17:01:54 -04001317 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
Zhu Yi97c8b012008-10-28 15:58:31 +08001318 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1319 sdata->dev->name, reason_code);
Jiri Bencf0706e82007-05-05 11:45:53 -07001320
Tomas Winkler48c2fc52008-08-06 14:22:01 +03001321 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1322 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
Jiri Bencf0706e82007-05-05 11:45:53 -07001323 mod_timer(&ifsta->timer, jiffies +
1324 IEEE80211_RETRY_AUTH_INTERVAL);
1325 }
1326
Vivek Natarajan5925d972008-11-21 22:19:50 -08001327 ieee80211_set_disassoc(sdata, ifsta, false, false, reason_code);
Jiri Bencf0706e82007-05-05 11:45:53 -07001328}
1329
1330
Johannes Berg471b3ef2007-12-28 14:32:58 +01001331static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001332 struct ieee80211_if_sta *ifsta,
1333 struct ieee80211_mgmt *mgmt,
1334 size_t len,
1335 int reassoc)
1336{
Johannes Berg471b3ef2007-12-28 14:32:58 +01001337 struct ieee80211_local *local = sdata->local;
Johannes Berg8318d782008-01-24 19:38:38 +01001338 struct ieee80211_supported_band *sband;
Jiri Bencf0706e82007-05-05 11:45:53 -07001339 struct sta_info *sta;
Johannes Berg881d9482009-01-21 15:13:48 +01001340 u32 rates, basic_rates;
Jiri Bencf0706e82007-05-05 11:45:53 -07001341 u16 capab_info, status_code, aid;
1342 struct ieee802_11_elems elems;
Johannes Bergbda39332008-10-11 01:51:51 +02001343 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
Jiri Bencf0706e82007-05-05 11:45:53 -07001344 u8 *pos;
Johannes Bergae5eb022008-10-14 16:58:37 +02001345 u32 changed = 0;
Jiri Bencf0706e82007-05-05 11:45:53 -07001346 int i, j;
Johannes Bergddf4ac52008-10-22 11:41:38 +02001347 bool have_higher_than_11mbit = false, newsta = false;
Johannes Bergae5eb022008-10-14 16:58:37 +02001348 u16 ap_ht_cap_flags;
Jiri Bencf0706e82007-05-05 11:45:53 -07001349
1350 /* AssocResp and ReassocResp have identical structure, so process both
1351 * of them in this function. */
1352
Tomas Winkler48c2fc52008-08-06 14:22:01 +03001353 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
Jiri Bencf0706e82007-05-05 11:45:53 -07001354 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001355
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001356 if (len < 24 + 6)
Jiri Bencf0706e82007-05-05 11:45:53 -07001357 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001358
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001359 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
Jiri Bencf0706e82007-05-05 11:45:53 -07001360 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001361
1362 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1363 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1364 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
Jiri Bencf0706e82007-05-05 11:45:53 -07001365
Johannes Berg0c68ae262008-10-27 15:56:10 -07001366 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
Jiri Bencf0706e82007-05-05 11:45:53 -07001367 "status=%d aid=%d)\n",
Johannes Berg0c68ae262008-10-27 15:56:10 -07001368 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
Johannes Bergddd68582007-10-22 14:51:37 +02001369 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
Jiri Bencf0706e82007-05-05 11:45:53 -07001370
Jouni Malinen63a5ab82009-01-08 13:32:09 +02001371 pos = mgmt->u.assoc_resp.variable;
1372 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1373
1374 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
Jouni Malinenf797eb72009-01-19 18:48:46 +02001375 elems.timeout_int && elems.timeout_int_len == 5 &&
1376 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
Jouni Malinen63a5ab82009-01-08 13:32:09 +02001377 u32 tu, ms;
Jouni Malinenf797eb72009-01-19 18:48:46 +02001378 tu = get_unaligned_le32(elems.timeout_int + 1);
Jouni Malinen63a5ab82009-01-08 13:32:09 +02001379 ms = tu * 1024 / 1000;
1380 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1381 "comeback duration %u TU (%u ms)\n",
1382 sdata->dev->name, tu, ms);
1383 if (ms > IEEE80211_ASSOC_TIMEOUT)
1384 mod_timer(&ifsta->timer,
1385 jiffies + msecs_to_jiffies(ms));
1386 return;
1387 }
1388
Jiri Bencf0706e82007-05-05 11:45:53 -07001389 if (status_code != WLAN_STATUS_SUCCESS) {
1390 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001391 sdata->dev->name, status_code);
Daniel Drake8a69aa92007-07-27 15:43:23 +02001392 /* if this was a reassociation, ensure we try a "full"
1393 * association next time. This works around some broken APs
1394 * which do not correctly reject reassociation requests. */
Jiri Slabyd6f2da52007-08-28 17:01:54 -04001395 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
Jiri Bencf0706e82007-05-05 11:45:53 -07001396 return;
1397 }
1398
Johannes Berg1dd84aa2007-10-10 12:03:41 +02001399 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1400 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001401 "set\n", sdata->dev->name, aid);
Johannes Berg1dd84aa2007-10-10 12:03:41 +02001402 aid &= ~(BIT(15) | BIT(14));
1403
Jiri Bencf0706e82007-05-05 11:45:53 -07001404 if (!elems.supp_rates) {
1405 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001406 sdata->dev->name);
Jiri Bencf0706e82007-05-05 11:45:53 -07001407 return;
1408 }
1409
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001410 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
Jiri Bencf0706e82007-05-05 11:45:53 -07001411 ifsta->aid = aid;
1412 ifsta->ap_capab = capab_info;
1413
1414 kfree(ifsta->assocresp_ies);
1415 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
Michael Wu0ec0b7a2007-07-27 15:43:24 +02001416 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
Jiri Bencf0706e82007-05-05 11:45:53 -07001417 if (ifsta->assocresp_ies)
1418 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1419
Johannes Bergd0709a62008-02-25 16:27:46 +01001420 rcu_read_lock();
1421
Jiri Bencf0706e82007-05-05 11:45:53 -07001422 /* Add STA entry for the AP */
1423 sta = sta_info_get(local, ifsta->bssid);
1424 if (!sta) {
Johannes Bergddf4ac52008-10-22 11:41:38 +02001425 newsta = true;
Johannes Bergd0709a62008-02-25 16:27:46 +01001426
Johannes Berg73651ee2008-02-25 16:27:47 +01001427 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1428 if (!sta) {
1429 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001430 " the AP\n", sdata->dev->name);
Johannes Bergd0709a62008-02-25 16:27:46 +01001431 rcu_read_unlock();
Jiri Bencf0706e82007-05-05 11:45:53 -07001432 return;
1433 }
Johannes Berg73651ee2008-02-25 16:27:47 +01001434
Ron Rindjunskya61dae12008-08-10 00:54:34 +03001435 /* update new sta with its last rx activity */
1436 sta->last_rx = jiffies;
Jiri Bencf0706e82007-05-05 11:45:53 -07001437 }
1438
Johannes Berg73651ee2008-02-25 16:27:47 +01001439 /*
1440 * FIXME: Do we really need to update the sta_info's information here?
1441 * We already know about the AP (we found it in our list) so it
1442 * should already be filled with the right info, no?
1443 * As is stands, all this is racy because typically we assume
1444 * the information that is filled in here (except flags) doesn't
1445 * change while a STA structure is alive. As such, it should move
1446 * to between the sta_info_alloc() and sta_info_insert() above.
1447 */
1448
Johannes Berg07346f812008-05-03 01:02:02 +02001449 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1450 WLAN_STA_AUTHORIZED);
Jiri Bencf0706e82007-05-05 11:45:53 -07001451
1452 rates = 0;
Johannes Berg8318d782008-01-24 19:38:38 +01001453 basic_rates = 0;
1454 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1455
Jiri Bencf0706e82007-05-05 11:45:53 -07001456 for (i = 0; i < elems.supp_rates_len; i++) {
1457 int rate = (elems.supp_rates[i] & 0x7f) * 5;
Tomas Winklerd61272c2008-10-30 17:08:08 +02001458 bool is_basic = !!(elems.supp_rates[i] & 0x80);
Johannes Berg8318d782008-01-24 19:38:38 +01001459
1460 if (rate > 110)
1461 have_higher_than_11mbit = true;
1462
1463 for (j = 0; j < sband->n_bitrates; j++) {
Tomas Winklerd61272c2008-10-30 17:08:08 +02001464 if (sband->bitrates[j].bitrate == rate) {
Jiri Bencf0706e82007-05-05 11:45:53 -07001465 rates |= BIT(j);
Tomas Winklerd61272c2008-10-30 17:08:08 +02001466 if (is_basic)
1467 basic_rates |= BIT(j);
1468 break;
1469 }
Johannes Berg8318d782008-01-24 19:38:38 +01001470 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001471 }
Johannes Berg8318d782008-01-24 19:38:38 +01001472
Jiri Bencf0706e82007-05-05 11:45:53 -07001473 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1474 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
Tomas Winklerd61272c2008-10-30 17:08:08 +02001475 bool is_basic = !!(elems.supp_rates[i] & 0x80);
Johannes Berg8318d782008-01-24 19:38:38 +01001476
1477 if (rate > 110)
1478 have_higher_than_11mbit = true;
1479
1480 for (j = 0; j < sband->n_bitrates; j++) {
Tomas Winklerd61272c2008-10-30 17:08:08 +02001481 if (sband->bitrates[j].bitrate == rate) {
Jiri Bencf0706e82007-05-05 11:45:53 -07001482 rates |= BIT(j);
Tomas Winklerd61272c2008-10-30 17:08:08 +02001483 if (is_basic)
1484 basic_rates |= BIT(j);
1485 break;
1486 }
Johannes Berg8318d782008-01-24 19:38:38 +01001487 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001488 }
Johannes Berg8318d782008-01-24 19:38:38 +01001489
Johannes Berg323ce792008-09-11 02:45:11 +02001490 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
Johannes Bergbda39332008-10-11 01:51:51 +02001491 sdata->vif.bss_conf.basic_rates = basic_rates;
Johannes Berg8318d782008-01-24 19:38:38 +01001492
1493 /* cf. IEEE 802.11 9.2.12 */
1494 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1495 have_higher_than_11mbit)
1496 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1497 else
1498 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
Jiri Bencf0706e82007-05-05 11:45:53 -07001499
Johannes Bergae5eb022008-10-14 16:58:37 +02001500 if (elems.ht_cap_elem)
1501 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
Johannes Bergd9fe60d2008-10-09 12:13:49 +02001502 elems.ht_cap_elem, &sta->sta.ht_cap);
Johannes Bergae5eb022008-10-14 16:58:37 +02001503
1504 ap_ht_cap_flags = sta->sta.ht_cap.cap;
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001505
Johannes Berg4b7679a2008-09-18 18:14:18 +02001506 rate_control_rate_init(sta);
Jiri Bencf0706e82007-05-05 11:45:53 -07001507
Jouni Malinen5394af42009-01-08 13:31:59 +02001508 if (ifsta->flags & IEEE80211_STA_MFP_ENABLED)
1509 set_sta_flags(sta, WLAN_STA_MFP);
1510
Johannes Bergddf4ac52008-10-22 11:41:38 +02001511 if (elems.wmm_param)
Johannes Berg07346f812008-05-03 01:02:02 +02001512 set_sta_flags(sta, WLAN_STA_WME);
Johannes Bergddf4ac52008-10-22 11:41:38 +02001513
1514 if (newsta) {
1515 int err = sta_info_insert(sta);
1516 if (err) {
1517 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1518 " the AP (error %d)\n", sdata->dev->name, err);
1519 rcu_read_unlock();
1520 return;
1521 }
1522 }
1523
1524 rcu_read_unlock();
1525
1526 if (elems.wmm_param)
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001527 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
Jiri Bencf0706e82007-05-05 11:45:53 -07001528 elems.wmm_param_len);
Jiri Bencf0706e82007-05-05 11:45:53 -07001529
Johannes Bergae5eb022008-10-14 16:58:37 +02001530 if (elems.ht_info_elem && elems.wmm_param &&
Vasanthakumar Thiagarajan53d6f81c2009-02-11 22:18:49 +05301531 (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
1532 !(ifsta->flags & IEEE80211_STA_TKIP_WEP_USED))
Johannes Bergae5eb022008-10-14 16:58:37 +02001533 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1534 ap_ht_cap_flags);
1535
Tomas Winkler21c0cbe2008-03-28 16:33:34 -07001536 /* set AID and assoc capability,
1537 * ieee80211_set_associated() will tell the driver */
Johannes Berg8318d782008-01-24 19:38:38 +01001538 bss_conf->aid = aid;
Tomas Winkler21c0cbe2008-03-28 16:33:34 -07001539 bss_conf->assoc_capability = capab_info;
Johannes Bergae5eb022008-10-14 16:58:37 +02001540 ieee80211_set_associated(sdata, ifsta, changed);
Jiri Bencf0706e82007-05-05 11:45:53 -07001541
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001542 ieee80211_associated(sdata, ifsta);
Jiri Bencf0706e82007-05-05 11:45:53 -07001543}
1544
1545
Johannes Berg99cf5f52009-02-10 21:25:56 +01001546static int __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
1547 struct ieee80211_if_sta *ifsta,
1548 const u8 *bssid, const int beacon_int,
1549 const int freq,
1550 const size_t supp_rates_len,
1551 const u8 *supp_rates,
1552 const u16 capability)
Bruno Randolfa6072682008-02-18 11:21:15 +09001553{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001554 struct ieee80211_local *local = sdata->local;
Alina Friedrichsenc4e3a582009-01-29 13:56:20 +01001555 int res = 0, rates, i, j;
Bruno Randolfa6072682008-02-18 11:21:15 +09001556 struct sk_buff *skb;
1557 struct ieee80211_mgmt *mgmt;
Bruno Randolfa6072682008-02-18 11:21:15 +09001558 u8 *pos;
Bruno Randolfa6072682008-02-18 11:21:15 +09001559 struct ieee80211_supported_band *sband;
Dan Williams507b06d2008-06-03 23:39:55 -04001560 union iwreq_data wrqu;
Bruno Randolfa6072682008-02-18 11:21:15 +09001561
Alina Friedrichsenc4e3a582009-01-29 13:56:20 +01001562 if (local->ops->reset_tsf) {
1563 /* Reset own TSF to allow time synchronization work. */
1564 local->ops->reset_tsf(local_to_hw(local));
1565 }
1566
1567 if ((ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) &&
Johannes Berg99cf5f52009-02-10 21:25:56 +01001568 memcmp(ifsta->bssid, bssid, ETH_ALEN) == 0)
Alina Friedrichsenc4e3a582009-01-29 13:56:20 +01001569 return res;
1570
Jouni Malinen9aed3cc2009-01-13 16:03:29 +02001571 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400 +
1572 sdata->u.sta.ie_proberesp_len);
Rami Rosene2ef12d2008-10-22 09:58:39 +02001573 if (!skb) {
1574 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1575 "response\n", sdata->dev->name);
1576 return -ENOMEM;
1577 }
1578
Alina Friedrichsenc4e3a582009-01-29 13:56:20 +01001579 if (!(ifsta->flags & IEEE80211_STA_PREV_BSSID_SET)) {
1580 /* Remove possible STA entries from other IBSS networks. */
1581 sta_info_flush_delayed(sdata);
Bruno Randolfa6072682008-02-18 11:21:15 +09001582 }
Alina Friedrichsenc4e3a582009-01-29 13:56:20 +01001583
Johannes Berg99cf5f52009-02-10 21:25:56 +01001584 memcpy(ifsta->bssid, bssid, ETH_ALEN);
Johannes Berg9d139c82008-07-09 14:40:37 +02001585 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
Bruno Randolfa6072682008-02-18 11:21:15 +09001586 if (res)
1587 return res;
1588
Johannes Berg99cf5f52009-02-10 21:25:56 +01001589 local->hw.conf.beacon_int = beacon_int >= 10 ? beacon_int : 10;
Bruno Randolfa6072682008-02-18 11:21:15 +09001590
Johannes Berg99cf5f52009-02-10 21:25:56 +01001591 sdata->drop_unencrypted = capability &
Bruno Randolfa6072682008-02-18 11:21:15 +09001592 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
1593
Johannes Berg99cf5f52009-02-10 21:25:56 +01001594 res = ieee80211_set_freq(sdata, freq);
Bruno Randolfa6072682008-02-18 11:21:15 +09001595
Assaf Kraussbe038b32008-06-05 19:55:21 +03001596 if (res)
1597 return res;
Bruno Randolfa6072682008-02-18 11:21:15 +09001598
Johannes Berg99cf5f52009-02-10 21:25:56 +01001599 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1600
Johannes Berg9d139c82008-07-09 14:40:37 +02001601 /* Build IBSS probe response */
Bruno Randolfa6072682008-02-18 11:21:15 +09001602
Rami Rosene2ef12d2008-10-22 09:58:39 +02001603 skb_reserve(skb, local->hw.extra_tx_headroom);
Bruno Randolfa6072682008-02-18 11:21:15 +09001604
Rami Rosene2ef12d2008-10-22 09:58:39 +02001605 mgmt = (struct ieee80211_mgmt *)
1606 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
1607 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
1608 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
Johannes Berg99cf5f52009-02-10 21:25:56 +01001609 IEEE80211_STYPE_PROBE_RESP);
Rami Rosene2ef12d2008-10-22 09:58:39 +02001610 memset(mgmt->da, 0xff, ETH_ALEN);
1611 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1612 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1613 mgmt->u.beacon.beacon_int =
1614 cpu_to_le16(local->hw.conf.beacon_int);
Johannes Berg99cf5f52009-02-10 21:25:56 +01001615 mgmt->u.beacon.capab_info = cpu_to_le16(capability);
Bruno Randolfa6072682008-02-18 11:21:15 +09001616
Rami Rosene2ef12d2008-10-22 09:58:39 +02001617 pos = skb_put(skb, 2 + ifsta->ssid_len);
1618 *pos++ = WLAN_EID_SSID;
1619 *pos++ = ifsta->ssid_len;
1620 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
Bruno Randolfa6072682008-02-18 11:21:15 +09001621
Johannes Berg99cf5f52009-02-10 21:25:56 +01001622 rates = supp_rates_len;
Rami Rosene2ef12d2008-10-22 09:58:39 +02001623 if (rates > 8)
1624 rates = 8;
1625 pos = skb_put(skb, 2 + rates);
1626 *pos++ = WLAN_EID_SUPP_RATES;
1627 *pos++ = rates;
Johannes Berg99cf5f52009-02-10 21:25:56 +01001628 memcpy(pos, supp_rates, rates);
Bruno Randolfa6072682008-02-18 11:21:15 +09001629
Johannes Berg99cf5f52009-02-10 21:25:56 +01001630 if (sband->band == IEEE80211_BAND_2GHZ) {
Rami Rosene2ef12d2008-10-22 09:58:39 +02001631 pos = skb_put(skb, 2 + 1);
1632 *pos++ = WLAN_EID_DS_PARAMS;
1633 *pos++ = 1;
Johannes Berg99cf5f52009-02-10 21:25:56 +01001634 *pos++ = ieee80211_frequency_to_channel(freq);
Bruno Randolfa6072682008-02-18 11:21:15 +09001635 }
1636
Rami Rosene2ef12d2008-10-22 09:58:39 +02001637 pos = skb_put(skb, 2 + 2);
1638 *pos++ = WLAN_EID_IBSS_PARAMS;
1639 *pos++ = 2;
1640 /* FIX: set ATIM window based on scan results */
1641 *pos++ = 0;
1642 *pos++ = 0;
1643
Johannes Berg99cf5f52009-02-10 21:25:56 +01001644 if (supp_rates_len > 8) {
1645 rates = supp_rates_len - 8;
Rami Rosene2ef12d2008-10-22 09:58:39 +02001646 pos = skb_put(skb, 2 + rates);
1647 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1648 *pos++ = rates;
Johannes Berg99cf5f52009-02-10 21:25:56 +01001649 memcpy(pos, &supp_rates[8], rates);
Rami Rosene2ef12d2008-10-22 09:58:39 +02001650 }
1651
Jouni Malinen9aed3cc2009-01-13 16:03:29 +02001652 add_extra_ies(skb, sdata->u.sta.ie_proberesp,
1653 sdata->u.sta.ie_proberesp_len);
1654
Rami Rosene2ef12d2008-10-22 09:58:39 +02001655 ifsta->probe_resp = skb;
1656
Johannes Berg078e1e62009-01-22 18:07:31 +01001657 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON |
1658 IEEE80211_IFCC_BEACON_ENABLED);
Rami Rosene2ef12d2008-10-22 09:58:39 +02001659
1660
Johannes Berg9d139c82008-07-09 14:40:37 +02001661 rates = 0;
Johannes Berg99cf5f52009-02-10 21:25:56 +01001662 for (i = 0; i < supp_rates_len; i++) {
1663 int bitrate = (supp_rates[i] & 0x7f) * 5;
Johannes Berg9d139c82008-07-09 14:40:37 +02001664 for (j = 0; j < sband->n_bitrates; j++)
1665 if (sband->bitrates[j].bitrate == bitrate)
1666 rates |= BIT(j);
1667 }
1668 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
1669
Johannes Berg99cf5f52009-02-10 21:25:56 +01001670 ieee80211_sta_def_wmm_params(sdata, supp_rates_len, supp_rates);
Johannes Berg9d139c82008-07-09 14:40:37 +02001671
Alina Friedrichsendfe67012009-01-24 01:19:04 +01001672 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
Tomas Winkler48c2fc52008-08-06 14:22:01 +03001673 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
Bruno Randolfa6072682008-02-18 11:21:15 +09001674 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1675
Emmanuel Grumbach4492bea2008-09-22 17:10:10 +03001676 ieee80211_led_assoc(local, true);
1677
Dan Williams507b06d2008-06-03 23:39:55 -04001678 memset(&wrqu, 0, sizeof(wrqu));
Johannes Berg99cf5f52009-02-10 21:25:56 +01001679 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001680 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
Bruno Randolfa6072682008-02-18 11:21:15 +09001681
1682 return res;
1683}
1684
Johannes Berg99cf5f52009-02-10 21:25:56 +01001685static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
1686 struct ieee80211_if_sta *ifsta,
1687 struct ieee80211_bss *bss)
1688{
1689 return __ieee80211_sta_join_ibss(sdata, ifsta,
Johannes Berg00d3f142009-02-10 21:26:00 +01001690 bss->cbss.bssid,
1691 bss->cbss.beacon_interval,
1692 bss->cbss.channel->center_freq,
Johannes Berg99cf5f52009-02-10 21:25:56 +01001693 bss->supp_rates_len, bss->supp_rates,
Johannes Berg00d3f142009-02-10 21:26:00 +01001694 bss->cbss.capability);
Johannes Berg99cf5f52009-02-10 21:25:56 +01001695}
1696
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001697static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001698 struct ieee80211_mgmt *mgmt,
1699 size_t len,
1700 struct ieee80211_rx_status *rx_status,
Johannes Berg98c8fcc2008-09-08 17:44:26 +02001701 struct ieee802_11_elems *elems,
1702 bool beacon)
Jiri Bencf0706e82007-05-05 11:45:53 -07001703{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001704 struct ieee80211_local *local = sdata->local;
Johannes Berg98c8fcc2008-09-08 17:44:26 +02001705 int freq;
Johannes Bergc2b13452008-09-11 00:01:55 +02001706 struct ieee80211_bss *bss;
Jiri Bencf0706e82007-05-05 11:45:53 -07001707 struct sta_info *sta;
Johannes Bergfab7d4a2008-03-16 18:42:44 +01001708 struct ieee80211_channel *channel;
Emmanuel Grumbach8e1535d2008-09-03 23:42:20 +03001709 u64 beacon_timestamp, rx_timestamp;
Johannes Berg881d9482009-01-21 15:13:48 +01001710 u32 supp_rates = 0;
Emmanuel Grumbach8e1535d2008-09-03 23:42:20 +03001711 enum ieee80211_band band = rx_status->band;
Jiri Bencf0706e82007-05-05 11:45:53 -07001712
Johannes Berg5bda6172008-09-08 11:05:10 +02001713 if (elems->ds_params && elems->ds_params_len == 1)
1714 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1715 else
1716 freq = rx_status->freq;
1717
1718 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1719
1720 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1721 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001722
Johannes Berg05c914f2008-09-11 00:01:58 +02001723 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && elems->supp_rates &&
Emmanuel Grumbach8e1535d2008-09-03 23:42:20 +03001724 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
Emmanuel Grumbach8e1535d2008-09-03 23:42:20 +03001725 supp_rates = ieee80211_sta_get_rates(local, elems, band);
1726
Johannes Berg69e6c012008-09-08 11:05:08 +02001727 rcu_read_lock();
1728
Emmanuel Grumbach8e1535d2008-09-03 23:42:20 +03001729 sta = sta_info_get(local, mgmt->sa);
1730 if (sta) {
Johannes Berg881d9482009-01-21 15:13:48 +01001731 u32 prev_rates;
Emmanuel Grumbach8e1535d2008-09-03 23:42:20 +03001732
Johannes Berg323ce792008-09-11 02:45:11 +02001733 prev_rates = sta->sta.supp_rates[band];
Emmanuel Grumbach8e1535d2008-09-03 23:42:20 +03001734 /* make sure mandatory rates are always added */
Johannes Berg323ce792008-09-11 02:45:11 +02001735 sta->sta.supp_rates[band] = supp_rates |
Johannes Berg96dd22a2008-09-11 00:01:57 +02001736 ieee80211_mandatory_rates(local, band);
Emmanuel Grumbach8e1535d2008-09-03 23:42:20 +03001737
1738#ifdef CONFIG_MAC80211_IBSS_DEBUG
Johannes Berg323ce792008-09-11 02:45:11 +02001739 if (sta->sta.supp_rates[band] != prev_rates)
Emmanuel Grumbach8e1535d2008-09-03 23:42:20 +03001740 printk(KERN_DEBUG "%s: updated supp_rates set "
Johannes Berg0c68ae262008-10-27 15:56:10 -07001741 "for %pM based on beacon info (0x%llx | "
Emmanuel Grumbach8e1535d2008-09-03 23:42:20 +03001742 "0x%llx -> 0x%llx)\n",
Johannes Berg17741cd2008-09-11 00:02:02 +02001743 sdata->dev->name,
Johannes Berg0c68ae262008-10-27 15:56:10 -07001744 sta->sta.addr,
Emmanuel Grumbach8e1535d2008-09-03 23:42:20 +03001745 (unsigned long long) prev_rates,
1746 (unsigned long long) supp_rates,
Johannes Berg323ce792008-09-11 02:45:11 +02001747 (unsigned long long) sta->sta.supp_rates[band]);
Emmanuel Grumbach8e1535d2008-09-03 23:42:20 +03001748#endif
1749 } else {
Rami Rosenab1f5c02008-12-11 14:00:25 +02001750 ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates);
Jiri Bencf0706e82007-05-05 11:45:53 -07001751 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001752
Johannes Berg69e6c012008-09-08 11:05:08 +02001753 rcu_read_unlock();
1754 }
Johannes Bergd0709a62008-02-25 16:27:46 +01001755
Johannes Berg98c8fcc2008-09-08 17:44:26 +02001756 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
Johannes Berg2a519312009-02-10 21:25:55 +01001757 channel, beacon);
Johannes Berg98c8fcc2008-09-08 17:44:26 +02001758 if (!bss)
1759 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001760
Sujithc481ec92009-01-06 09:28:37 +05301761 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1762 (memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0)) {
1763 struct ieee80211_channel_sw_ie *sw_elem =
1764 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1765 ieee80211_process_chanswitch(sdata, sw_elem, bss);
1766 }
1767
Johannes Berg98c8fcc2008-09-08 17:44:26 +02001768 /* was just updated in ieee80211_bss_info_update */
Johannes Berg00d3f142009-02-10 21:26:00 +01001769 beacon_timestamp = bss->cbss.tsf;
Daniel Drake56282212007-07-10 19:32:10 +02001770
Johannes Bergfe3d2c32009-02-10 21:26:03 +01001771 if (sdata->vif.type != NL80211_IFTYPE_ADHOC)
1772 goto put_bss;
Johannes Berg30b89b02008-04-16 17:43:20 +02001773
Bruno Randolf9d9bf772008-02-18 11:21:36 +09001774 /* check if we need to merge IBSS */
Johannes Bergfe3d2c32009-02-10 21:26:03 +01001775
1776 /* merge only on beacons (???) */
1777 if (!beacon)
1778 goto put_bss;
1779
1780 /* we use a fixed BSSID */
1781 if (sdata->u.sta.flags & IEEE80211_STA_BSSID_SET)
1782 goto put_bss;
1783
1784 /* not an IBSS */
1785 if (!(bss->cbss.capability & WLAN_CAPABILITY_IBSS))
1786 goto put_bss;
1787
1788 /* different channel */
1789 if (bss->cbss.channel != local->oper_channel)
1790 goto put_bss;
1791
1792 /* different SSID */
1793 if (elems->ssid_len != sdata->u.sta.ssid_len ||
Ester Kummerae6a44e2008-06-27 18:54:48 +03001794 memcmp(elems->ssid, sdata->u.sta.ssid,
Johannes Bergfe3d2c32009-02-10 21:26:03 +01001795 sdata->u.sta.ssid_len))
1796 goto put_bss;
1797
1798 if (rx_status->flag & RX_FLAG_TSFT) {
1799 /*
1800 * For correct IBSS merging we need mactime; since mactime is
1801 * defined as the time the first data symbol of the frame hits
1802 * the PHY, and the timestamp of the beacon is defined as "the
1803 * time that the data symbol containing the first bit of the
1804 * timestamp is transmitted to the PHY plus the transmitting
1805 * STA's delays through its local PHY from the MAC-PHY
1806 * interface to its interface with the WM" (802.11 11.1.2)
1807 * - equals the time this bit arrives at the receiver - we have
1808 * to take into account the offset between the two.
1809 *
1810 * E.g. at 1 MBit that means mactime is 192 usec earlier
1811 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
1812 */
1813 int rate;
1814
1815 if (rx_status->flag & RX_FLAG_HT)
1816 rate = 65; /* TODO: HT rates */
Bruno Randolf9d9bf772008-02-18 11:21:36 +09001817 else
Johannes Bergfe3d2c32009-02-10 21:26:03 +01001818 rate = local->hw.wiphy->bands[band]->
1819 bitrates[rx_status->rate_idx].bitrate;
1820
1821 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
1822 } else if (local && local->ops && local->ops->get_tsf)
1823 /* second best option: get current TSF */
1824 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
1825 else
1826 /* can't merge without knowing the TSF */
1827 rx_timestamp = -1LLU;
1828
Bruno Randolf9d9bf772008-02-18 11:21:36 +09001829#ifdef CONFIG_MAC80211_IBSS_DEBUG
Johannes Bergfe3d2c32009-02-10 21:26:03 +01001830 printk(KERN_DEBUG "RX beacon SA=%pM BSSID="
1831 "%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
1832 mgmt->sa, mgmt->bssid,
1833 (unsigned long long)rx_timestamp,
1834 (unsigned long long)beacon_timestamp,
1835 (unsigned long long)(rx_timestamp - beacon_timestamp),
1836 jiffies);
Johannes Bergfba4a1e2008-02-21 11:08:33 +01001837#endif
Johannes Bergfe3d2c32009-02-10 21:26:03 +01001838
1839 if (beacon_timestamp > rx_timestamp) {
1840#ifdef CONFIG_MAC80211_IBSS_DEBUG
1841 printk(KERN_DEBUG "%s: beacon TSF higher than "
1842 "local TSF - IBSS merge with BSSID %pM\n",
1843 sdata->dev->name, mgmt->bssid);
1844#endif
1845 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
1846 ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates);
Bruno Randolf9d9bf772008-02-18 11:21:36 +09001847 }
1848
Johannes Bergfe3d2c32009-02-10 21:26:03 +01001849 put_bss:
Johannes Berg3e122be2008-07-09 14:40:34 +02001850 ieee80211_rx_bss_put(local, bss);
Jiri Bencf0706e82007-05-05 11:45:53 -07001851}
1852
1853
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001854static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001855 struct ieee80211_mgmt *mgmt,
1856 size_t len,
1857 struct ieee80211_rx_status *rx_status)
1858{
Ester Kummerae6a44e2008-06-27 18:54:48 +03001859 size_t baselen;
1860 struct ieee802_11_elems elems;
Ron Rindjunsky9859b812008-08-09 03:02:19 +03001861 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
Ester Kummerae6a44e2008-06-27 18:54:48 +03001862
Tomas Winkler8e7cdbb2008-08-03 14:32:01 +03001863 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1864 return; /* ignore ProbeResp to foreign address */
1865
Ester Kummerae6a44e2008-06-27 18:54:48 +03001866 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1867 if (baselen > len)
1868 return;
1869
1870 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1871 &elems);
1872
Johannes Berg98c8fcc2008-09-08 17:44:26 +02001873 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
Ron Rindjunsky9859b812008-08-09 03:02:19 +03001874
1875 /* direct probe may be part of the association flow */
1876 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1877 &ifsta->request)) {
1878 printk(KERN_DEBUG "%s direct probe responded\n",
1879 sdata->dev->name);
1880 ieee80211_authenticate(sdata, ifsta);
1881 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001882}
1883
1884
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001885static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001886 struct ieee80211_mgmt *mgmt,
1887 size_t len,
1888 struct ieee80211_rx_status *rx_status)
1889{
Jiri Bencf0706e82007-05-05 11:45:53 -07001890 struct ieee80211_if_sta *ifsta;
Jiri Bencf0706e82007-05-05 11:45:53 -07001891 size_t baselen;
1892 struct ieee802_11_elems elems;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001893 struct ieee80211_local *local = sdata->local;
Johannes Berg471b3ef2007-12-28 14:32:58 +01001894 u32 changed = 0;
Kalle Valo1fb36062009-02-10 17:09:24 +02001895 bool erp_valid, directed_tim;
Johannes Berg7a5158e2008-10-08 10:59:33 +02001896 u8 erp_value = 0;
Jiri Bencf0706e82007-05-05 11:45:53 -07001897
Ester Kummerae6a44e2008-06-27 18:54:48 +03001898 /* Process beacon from the current BSS */
1899 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1900 if (baselen > len)
1901 return;
1902
1903 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1904
Johannes Berg98c8fcc2008-09-08 17:44:26 +02001905 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
Jiri Bencf0706e82007-05-05 11:45:53 -07001906
Johannes Berg05c914f2008-09-11 00:01:58 +02001907 if (sdata->vif.type != NL80211_IFTYPE_STATION)
Jiri Bencf0706e82007-05-05 11:45:53 -07001908 return;
1909 ifsta = &sdata->u.sta;
1910
Jiri Slabyd6f2da52007-08-28 17:01:54 -04001911 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
Jiri Bencf0706e82007-05-05 11:45:53 -07001912 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1913 return;
1914
Sujithc481ec92009-01-06 09:28:37 +05301915 if (rx_status->freq != local->hw.conf.channel->center_freq)
1916 return;
1917
Johannes Bergfe3fa822008-09-08 11:05:09 +02001918 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1919 elems.wmm_param_len);
1920
Johannes Berg4be8c382009-01-07 18:28:20 +01001921 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK &&
1922 local->hw.conf.flags & IEEE80211_CONF_PS) {
Kalle Valo1fb36062009-02-10 17:09:24 +02001923 directed_tim = ieee80211_check_tim(&elems, ifsta->aid);
Vivek Natarajana97b77b2008-12-23 18:39:02 -08001924
Kalle Valo1fb36062009-02-10 17:09:24 +02001925 if (directed_tim) {
Kalle Valo572e0012009-02-10 17:09:31 +02001926 if (local->hw.conf.dynamic_ps_timeout > 0) {
1927 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1928 ieee80211_hw_config(local,
1929 IEEE80211_CONF_CHANGE_PS);
1930 ieee80211_send_nullfunc(local, sdata, 0);
1931 } else {
1932 local->pspolling = true;
1933
1934 /*
1935 * Here is assumed that the driver will be
1936 * able to send ps-poll frame and receive a
1937 * response even though power save mode is
1938 * enabled, but some drivers might require
1939 * to disable power save here. This needs
1940 * to be investigated.
1941 */
1942 ieee80211_send_pspoll(local, sdata);
1943 }
Vivek Natarajana97b77b2008-12-23 18:39:02 -08001944 }
1945 }
Johannes Berg7a5158e2008-10-08 10:59:33 +02001946
1947 if (elems.erp_info && elems.erp_info_len >= 1) {
1948 erp_valid = true;
1949 erp_value = elems.erp_info[0];
1950 } else {
1951 erp_valid = false;
John W. Linville50c4afb2008-04-15 14:09:27 -04001952 }
Johannes Berg7a5158e2008-10-08 10:59:33 +02001953 changed |= ieee80211_handle_bss_capability(sdata,
1954 le16_to_cpu(mgmt->u.beacon.capab_info),
1955 erp_valid, erp_value);
Jiri Bencf0706e82007-05-05 11:45:53 -07001956
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001957
Vasanthakumar Thiagarajan53d6f81c2009-02-11 22:18:49 +05301958 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1959 !(ifsta->flags & IEEE80211_STA_TKIP_WEP_USED)) {
Johannes Bergae5eb022008-10-14 16:58:37 +02001960 struct sta_info *sta;
1961 struct ieee80211_supported_band *sband;
1962 u16 ap_ht_cap_flags;
1963
1964 rcu_read_lock();
1965
1966 sta = sta_info_get(local, ifsta->bssid);
1967 if (!sta) {
1968 rcu_read_unlock();
1969 return;
1970 }
1971
1972 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1973
1974 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1975 elems.ht_cap_elem, &sta->sta.ht_cap);
1976
1977 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1978
1979 rcu_read_unlock();
1980
1981 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1982 ap_ht_cap_flags);
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001983 }
1984
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001985 if (elems.country_elem) {
1986 /* Note we are only reviewing this on beacons
1987 * for the BSSID we are associated to */
1988 regulatory_hint_11d(local->hw.wiphy,
1989 elems.country_elem, elems.country_elem_len);
Vasanthakumar Thiagarajana8302de2009-01-09 18:14:15 +05301990
1991 /* TODO: IBSS also needs this */
1992 if (elems.pwr_constr_elem)
1993 ieee80211_handle_pwr_constr(sdata,
1994 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1995 elems.pwr_constr_elem,
1996 elems.pwr_constr_elem_len);
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001997 }
1998
Johannes Berg471b3ef2007-12-28 14:32:58 +01001999 ieee80211_bss_info_change_notify(sdata, changed);
Jiri Bencf0706e82007-05-05 11:45:53 -07002000}
2001
2002
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002003static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07002004 struct ieee80211_if_sta *ifsta,
2005 struct ieee80211_mgmt *mgmt,
Rami Rosen504a71e2009-01-06 10:50:51 +02002006 size_t len)
Jiri Bencf0706e82007-05-05 11:45:53 -07002007{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002008 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -07002009 int tx_last_beacon;
2010 struct sk_buff *skb;
2011 struct ieee80211_mgmt *resp;
2012 u8 *pos, *end;
2013
Johannes Bergfe3d2c32009-02-10 21:26:03 +01002014 if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
Jiri Bencf0706e82007-05-05 11:45:53 -07002015 len < 24 + 2 || !ifsta->probe_resp)
2016 return;
2017
2018 if (local->ops->tx_last_beacon)
2019 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2020 else
2021 tx_last_beacon = 1;
2022
2023#ifdef CONFIG_MAC80211_IBSS_DEBUG
Johannes Berg0c68ae262008-10-27 15:56:10 -07002024 printk(KERN_DEBUG "%s: RX ProbeReq SA=%pM DA=%pM BSSID=%pM"
2025 " (tx_last_beacon=%d)\n",
2026 sdata->dev->name, mgmt->sa, mgmt->da,
2027 mgmt->bssid, tx_last_beacon);
Jiri Bencf0706e82007-05-05 11:45:53 -07002028#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2029
2030 if (!tx_last_beacon)
2031 return;
2032
2033 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2034 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2035 return;
2036
2037 end = ((u8 *) mgmt) + len;
2038 pos = mgmt->u.probe_req.variable;
2039 if (pos[0] != WLAN_EID_SSID ||
2040 pos + 2 + pos[1] > end) {
Johannes Bergf4ea83d2008-06-30 15:10:46 +02002041#ifdef CONFIG_MAC80211_IBSS_DEBUG
2042 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
Johannes Berg0c68ae262008-10-27 15:56:10 -07002043 "from %pM\n",
2044 sdata->dev->name, mgmt->sa);
Johannes Bergf4ea83d2008-06-30 15:10:46 +02002045#endif
Jiri Bencf0706e82007-05-05 11:45:53 -07002046 return;
2047 }
2048 if (pos[1] != 0 &&
2049 (pos[1] != ifsta->ssid_len ||
2050 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2051 /* Ignore ProbeReq for foreign SSID */
2052 return;
2053 }
2054
2055 /* Reply with ProbeResp */
Michael Wu0ec0b7a2007-07-27 15:43:24 +02002056 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
Jiri Bencf0706e82007-05-05 11:45:53 -07002057 if (!skb)
2058 return;
2059
2060 resp = (struct ieee80211_mgmt *) skb->data;
2061 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2062#ifdef CONFIG_MAC80211_IBSS_DEBUG
Johannes Berg0c68ae262008-10-27 15:56:10 -07002063 printk(KERN_DEBUG "%s: Sending ProbeResp to %pM\n",
2064 sdata->dev->name, resp->da);
Jiri Bencf0706e82007-05-05 11:45:53 -07002065#endif /* CONFIG_MAC80211_IBSS_DEBUG */
Johannes Berge50db652008-09-09 15:07:09 +02002066 ieee80211_tx_skb(sdata, skb, 0);
Jiri Bencf0706e82007-05-05 11:45:53 -07002067}
2068
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002069void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
Jiri Bencf0706e82007-05-05 11:45:53 -07002070 struct ieee80211_rx_status *rx_status)
2071{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002072 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -07002073 struct ieee80211_if_sta *ifsta;
2074 struct ieee80211_mgmt *mgmt;
2075 u16 fc;
2076
2077 if (skb->len < 24)
2078 goto fail;
2079
Jiri Bencf0706e82007-05-05 11:45:53 -07002080 ifsta = &sdata->u.sta;
2081
2082 mgmt = (struct ieee80211_mgmt *) skb->data;
2083 fc = le16_to_cpu(mgmt->frame_control);
2084
2085 switch (fc & IEEE80211_FCTL_STYPE) {
2086 case IEEE80211_STYPE_PROBE_REQ:
2087 case IEEE80211_STYPE_PROBE_RESP:
2088 case IEEE80211_STYPE_BEACON:
2089 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2090 case IEEE80211_STYPE_AUTH:
2091 case IEEE80211_STYPE_ASSOC_RESP:
2092 case IEEE80211_STYPE_REASSOC_RESP:
2093 case IEEE80211_STYPE_DEAUTH:
2094 case IEEE80211_STYPE_DISASSOC:
2095 skb_queue_tail(&ifsta->skb_queue, skb);
2096 queue_work(local->hw.workqueue, &ifsta->work);
2097 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07002098 }
2099
2100 fail:
2101 kfree_skb(skb);
2102}
2103
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002104static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07002105 struct sk_buff *skb)
2106{
2107 struct ieee80211_rx_status *rx_status;
Jiri Bencf0706e82007-05-05 11:45:53 -07002108 struct ieee80211_if_sta *ifsta;
2109 struct ieee80211_mgmt *mgmt;
2110 u16 fc;
2111
Jiri Bencf0706e82007-05-05 11:45:53 -07002112 ifsta = &sdata->u.sta;
2113
2114 rx_status = (struct ieee80211_rx_status *) skb->cb;
2115 mgmt = (struct ieee80211_mgmt *) skb->data;
2116 fc = le16_to_cpu(mgmt->frame_control);
2117
Johannes Bergfe3d2c32009-02-10 21:26:03 +01002118 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
2119 switch (fc & IEEE80211_FCTL_STYPE) {
2120 case IEEE80211_STYPE_PROBE_REQ:
2121 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt,
2122 skb->len);
2123 break;
2124 case IEEE80211_STYPE_PROBE_RESP:
2125 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
2126 rx_status);
2127 break;
2128 case IEEE80211_STYPE_BEACON:
2129 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
2130 rx_status);
2131 break;
2132 case IEEE80211_STYPE_AUTH:
2133 ieee80211_rx_mgmt_auth_ibss(sdata, ifsta, mgmt,
2134 skb->len);
2135 break;
2136 }
2137 } else { /* NL80211_IFTYPE_STATION */
2138 switch (fc & IEEE80211_FCTL_STYPE) {
2139 case IEEE80211_STYPE_PROBE_RESP:
2140 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
2141 rx_status);
2142 break;
2143 case IEEE80211_STYPE_BEACON:
2144 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
2145 rx_status);
2146 break;
2147 case IEEE80211_STYPE_AUTH:
2148 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
2149 break;
2150 case IEEE80211_STYPE_ASSOC_RESP:
2151 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt,
2152 skb->len, 0);
2153 break;
2154 case IEEE80211_STYPE_REASSOC_RESP:
2155 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt,
2156 skb->len, 1);
2157 break;
2158 case IEEE80211_STYPE_DEAUTH:
2159 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
2160 break;
2161 case IEEE80211_STYPE_DISASSOC:
2162 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt,
2163 skb->len);
2164 break;
2165 }
Jiri Bencf0706e82007-05-05 11:45:53 -07002166 }
2167
2168 kfree_skb(skb);
2169}
2170
2171
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002172static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
Jiri Bencf0706e82007-05-05 11:45:53 -07002173{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002174 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -07002175 int active = 0;
2176 struct sta_info *sta;
2177
Johannes Bergd0709a62008-02-25 16:27:46 +01002178 rcu_read_lock();
2179
2180 list_for_each_entry_rcu(sta, &local->sta_list, list) {
2181 if (sta->sdata == sdata &&
Jiri Bencf0706e82007-05-05 11:45:53 -07002182 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2183 jiffies)) {
2184 active++;
2185 break;
2186 }
2187 }
Johannes Bergd0709a62008-02-25 16:27:46 +01002188
2189 rcu_read_unlock();
Jiri Bencf0706e82007-05-05 11:45:53 -07002190
2191 return active;
2192}
2193
2194
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002195static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07002196 struct ieee80211_if_sta *ifsta)
2197{
2198 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2199
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002200 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
2201 if (ieee80211_sta_active_ibss(sdata))
Jiri Bencf0706e82007-05-05 11:45:53 -07002202 return;
2203
Alina Friedrichsen137f9f42009-01-06 02:49:07 +01002204 if ((sdata->u.sta.flags & IEEE80211_STA_BSSID_SET) &&
2205 (!(sdata->u.sta.flags & IEEE80211_STA_AUTO_CHANNEL_SEL)))
2206 return;
2207
Jiri Bencf0706e82007-05-05 11:45:53 -07002208 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002209 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
Johannes Berg2a519312009-02-10 21:25:55 +01002210
2211 /* XXX maybe racy? */
2212 if (sdata->local->scan_req)
2213 return;
2214
2215 memcpy(sdata->local->int_scan_req.ssids[0].ssid,
2216 ifsta->ssid, IEEE80211_MAX_SSID_LEN);
2217 sdata->local->int_scan_req.ssids[0].ssid_len = ifsta->ssid_len;
2218 ieee80211_request_scan(sdata, &sdata->local->int_scan_req);
Jiri Bencf0706e82007-05-05 11:45:53 -07002219}
2220
2221
Johannes Berg9c6bd792008-09-11 00:01:52 +02002222static void ieee80211_sta_timer(unsigned long data)
Jiri Bencf0706e82007-05-05 11:45:53 -07002223{
2224 struct ieee80211_sub_if_data *sdata =
2225 (struct ieee80211_sub_if_data *) data;
2226 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002227 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -07002228
2229 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2230 queue_work(local->hw.workqueue, &ifsta->work);
2231}
2232
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002233static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07002234 struct ieee80211_if_sta *ifsta)
2235{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002236 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -07002237
2238 if (local->ops->reset_tsf) {
2239 /* Reset own TSF to allow time synchronization work. */
2240 local->ops->reset_tsf(local_to_hw(local));
2241 }
2242
2243 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2244
2245
2246 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2247 ifsta->auth_alg = WLAN_AUTH_OPEN;
2248 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2249 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2250 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2251 ifsta->auth_alg = WLAN_AUTH_LEAP;
2252 else
2253 ifsta->auth_alg = WLAN_AUTH_OPEN;
Jiri Bencf0706e82007-05-05 11:45:53 -07002254 ifsta->auth_transaction = -1;
Jiri Slabyd6f2da52007-08-28 17:01:54 -04002255 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
Ron Rindjunsky6042a3e2008-08-08 01:50:46 +03002256 ifsta->assoc_scan_tries = 0;
Ron Rindjunsky9859b812008-08-09 03:02:19 +03002257 ifsta->direct_probe_tries = 0;
Ron Rindjunsky6042a3e2008-08-08 01:50:46 +03002258 ifsta->auth_tries = 0;
2259 ifsta->assoc_tries = 0;
Tomas Winkler24e64622008-09-08 17:33:40 +02002260 netif_tx_stop_all_queues(sdata->dev);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002261 netif_carrier_off(sdata->dev);
Jiri Bencf0706e82007-05-05 11:45:53 -07002262}
2263
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002264static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07002265 struct ieee80211_if_sta *ifsta)
2266{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002267 struct ieee80211_local *local = sdata->local;
Johannes Berg8318d782008-01-24 19:38:38 +01002268 struct ieee80211_supported_band *sband;
Johannes Berg99cf5f52009-02-10 21:25:56 +01002269 u8 *pos;
2270 u8 bssid[ETH_ALEN];
2271 u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
2272 u16 capability;
Jiri Bencf0706e82007-05-05 11:45:53 -07002273 int i;
2274
Alina Friedrichsendfe67012009-01-24 01:19:04 +01002275 if (sdata->u.sta.flags & IEEE80211_STA_BSSID_SET) {
2276 memcpy(bssid, ifsta->bssid, ETH_ALEN);
2277 } else {
2278 /* Generate random, not broadcast, locally administered BSSID. Mix in
2279 * own MAC address to make sure that devices that do not have proper
2280 * random number generator get different BSSID. */
2281 get_random_bytes(bssid, ETH_ALEN);
2282 for (i = 0; i < ETH_ALEN; i++)
2283 bssid[i] ^= sdata->dev->dev_addr[i];
2284 bssid[0] &= ~0x01;
2285 bssid[0] |= 0x02;
2286 }
Jiri Bencf0706e82007-05-05 11:45:53 -07002287
Johannes Berg0c68ae262008-10-27 15:56:10 -07002288 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %pM\n",
2289 sdata->dev->name, bssid);
Jiri Bencf0706e82007-05-05 11:45:53 -07002290
Johannes Berg99cf5f52009-02-10 21:25:56 +01002291 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
Jiri Bencf0706e82007-05-05 11:45:53 -07002292
2293 if (local->hw.conf.beacon_int == 0)
Tomas Winklerdc0ae302008-06-12 22:38:37 +03002294 local->hw.conf.beacon_int = 100;
Johannes Berg99cf5f52009-02-10 21:25:56 +01002295
2296 capability = WLAN_CAPABILITY_IBSS;
Johannes Berg988c0f72008-04-17 19:21:22 +02002297
2298 if (sdata->default_key)
Johannes Berg99cf5f52009-02-10 21:25:56 +01002299 capability |= WLAN_CAPABILITY_PRIVACY;
Johannes Berg988c0f72008-04-17 19:21:22 +02002300 else
Jiri Bencf0706e82007-05-05 11:45:53 -07002301 sdata->drop_unencrypted = 0;
Johannes Berg988c0f72008-04-17 19:21:22 +02002302
Johannes Berg99cf5f52009-02-10 21:25:56 +01002303 pos = supp_rates;
Johannes Berg8318d782008-01-24 19:38:38 +01002304 for (i = 0; i < sband->n_bitrates; i++) {
2305 int rate = sband->bitrates[i].bitrate;
Jiri Bencf0706e82007-05-05 11:45:53 -07002306 *pos++ = (u8) (rate / 5);
2307 }
2308
Johannes Berg99cf5f52009-02-10 21:25:56 +01002309 return __ieee80211_sta_join_ibss(sdata, ifsta,
2310 bssid, local->hw.conf.beacon_int,
2311 local->hw.conf.channel->center_freq,
2312 sband->n_bitrates, supp_rates,
2313 capability);
Jiri Bencf0706e82007-05-05 11:45:53 -07002314}
2315
2316
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002317static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07002318 struct ieee80211_if_sta *ifsta)
2319{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002320 struct ieee80211_local *local = sdata->local;
Johannes Bergc2b13452008-09-11 00:01:55 +02002321 struct ieee80211_bss *bss;
Jiri Bencf0706e82007-05-05 11:45:53 -07002322 int active_ibss;
2323
2324 if (ifsta->ssid_len == 0)
2325 return -EINVAL;
2326
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002327 active_ibss = ieee80211_sta_active_ibss(sdata);
Jiri Bencf0706e82007-05-05 11:45:53 -07002328#ifdef CONFIG_MAC80211_IBSS_DEBUG
2329 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002330 sdata->dev->name, active_ibss);
Jiri Bencf0706e82007-05-05 11:45:53 -07002331#endif /* CONFIG_MAC80211_IBSS_DEBUG */
Jiri Bencf0706e82007-05-05 11:45:53 -07002332
Johannes Berg00d3f142009-02-10 21:26:00 +01002333 if (active_ibss)
2334 return 0;
Daniel Drake80693ce2008-07-19 23:31:17 +01002335
Johannes Berg00d3f142009-02-10 21:26:00 +01002336 if (ifsta->flags & IEEE80211_STA_BSSID_SET)
2337 bss = ieee80211_rx_bss_get(local, ifsta->bssid, 0,
Daniel Drake80693ce2008-07-19 23:31:17 +01002338 ifsta->ssid, ifsta->ssid_len);
Johannes Berg00d3f142009-02-10 21:26:00 +01002339 else
2340 bss = (void *)cfg80211_get_ibss(local->hw.wiphy,
2341 NULL,
2342 ifsta->ssid, ifsta->ssid_len);
2343
2344#ifdef CONFIG_MAC80211_IBSS_DEBUG
2345 if (bss)
2346 printk(KERN_DEBUG " sta_find_ibss: selected %pM current "
2347 "%pM\n", bss->cbss.bssid, ifsta->bssid);
2348#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2349
2350 if (bss &&
2351 (!(ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) ||
2352 memcmp(ifsta->bssid, bss->cbss.bssid, ETH_ALEN))) {
2353 int ret;
Daniel Drake80693ce2008-07-19 23:31:17 +01002354
Johannes Berg0c68ae262008-10-27 15:56:10 -07002355 printk(KERN_DEBUG "%s: Selected IBSS BSSID %pM"
Jiri Bencf0706e82007-05-05 11:45:53 -07002356 " based on configured SSID\n",
Johannes Berg00d3f142009-02-10 21:26:00 +01002357 sdata->dev->name, bss->cbss.bssid);
2358
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002359 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
Johannes Berg3e122be2008-07-09 14:40:34 +02002360 ieee80211_rx_bss_put(local, bss);
Tomas Winkler167ad6f2008-05-21 18:17:05 +03002361 return ret;
Johannes Berg00d3f142009-02-10 21:26:00 +01002362 } else if (bss)
2363 ieee80211_rx_bss_put(local, bss);
Daniel Drake80693ce2008-07-19 23:31:17 +01002364
Jiri Bencf0706e82007-05-05 11:45:53 -07002365#ifdef CONFIG_MAC80211_IBSS_DEBUG
2366 printk(KERN_DEBUG " did not try to join ibss\n");
2367#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2368
2369 /* Selected IBSS not found in current scan results - try to scan */
Tomas Winkler48c2fc52008-08-06 14:22:01 +03002370 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002371 !ieee80211_sta_active_ibss(sdata)) {
Jiri Bencf0706e82007-05-05 11:45:53 -07002372 mod_timer(&ifsta->timer, jiffies +
2373 IEEE80211_IBSS_MERGE_INTERVAL);
2374 } else if (time_after(jiffies, local->last_scan_completed +
2375 IEEE80211_SCAN_INTERVAL)) {
2376 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002377 "join\n", sdata->dev->name);
Johannes Berg2a519312009-02-10 21:25:55 +01002378
2379 /* XXX maybe racy? */
2380 if (local->scan_req)
2381 return -EBUSY;
2382
2383 memcpy(local->int_scan_req.ssids[0].ssid,
2384 ifsta->ssid, IEEE80211_MAX_SSID_LEN);
2385 local->int_scan_req.ssids[0].ssid_len = ifsta->ssid_len;
2386 return ieee80211_request_scan(sdata, &local->int_scan_req);
Tomas Winkler48c2fc52008-08-06 14:22:01 +03002387 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
Jiri Bencf0706e82007-05-05 11:45:53 -07002388 int interval = IEEE80211_SCAN_INTERVAL;
2389
2390 if (time_after(jiffies, ifsta->ibss_join_req +
2391 IEEE80211_IBSS_JOIN_TIMEOUT)) {
Jiri Slabyd6f2da52007-08-28 17:01:54 -04002392 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
Johannes Berg8318d782008-01-24 19:38:38 +01002393 (!(local->oper_channel->flags &
2394 IEEE80211_CHAN_NO_IBSS)))
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002395 return ieee80211_sta_create_ibss(sdata, ifsta);
Jiri Slabyd6f2da52007-08-28 17:01:54 -04002396 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
Johannes Berg8318d782008-01-24 19:38:38 +01002397 printk(KERN_DEBUG "%s: IBSS not allowed on"
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002398 " %d MHz\n", sdata->dev->name,
Johannes Berg8318d782008-01-24 19:38:38 +01002399 local->hw.conf.channel->center_freq);
Jiri Bencf0706e82007-05-05 11:45:53 -07002400 }
2401
2402 /* No IBSS found - decrease scan interval and continue
2403 * scanning. */
2404 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2405 }
2406
Tomas Winkler48c2fc52008-08-06 14:22:01 +03002407 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
Jiri Bencf0706e82007-05-05 11:45:53 -07002408 mod_timer(&ifsta->timer, jiffies + interval);
2409 return 0;
2410 }
2411
2412 return 0;
2413}
2414
2415
Johannes Berg60f8b392008-09-08 17:44:22 +02002416static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
2417 struct ieee80211_if_sta *ifsta)
2418{
2419 struct ieee80211_local *local = sdata->local;
Johannes Berg00d3f142009-02-10 21:26:00 +01002420 struct ieee80211_bss *bss;
2421 u8 *bssid = ifsta->bssid, *ssid = ifsta->ssid;
2422 u8 ssid_len = ifsta->ssid_len;
2423 u16 capa_mask = WLAN_CAPABILITY_ESS;
2424 u16 capa_val = WLAN_CAPABILITY_ESS;
2425 struct ieee80211_channel *chan = local->oper_channel;
Johannes Berg60f8b392008-09-08 17:44:22 +02002426
Johannes Berg00d3f142009-02-10 21:26:00 +01002427 if (ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2428 IEEE80211_STA_AUTO_BSSID_SEL |
2429 IEEE80211_STA_AUTO_CHANNEL_SEL)) {
2430 capa_mask |= WLAN_CAPABILITY_PRIVACY;
2431 if (sdata->default_key)
2432 capa_val |= WLAN_CAPABILITY_PRIVACY;
Johannes Berg60f8b392008-09-08 17:44:22 +02002433 }
Johannes Berg60f8b392008-09-08 17:44:22 +02002434
Johannes Berg00d3f142009-02-10 21:26:00 +01002435 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2436 chan = NULL;
2437
2438 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2439 bssid = NULL;
2440
2441 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) {
2442 ssid = NULL;
2443 ssid_len = 0;
2444 }
2445
2446 bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
2447 bssid, ssid, ssid_len,
2448 capa_mask, capa_val);
2449
2450 if (bss) {
2451 ieee80211_set_freq(sdata, bss->cbss.channel->center_freq);
Johannes Berg60f8b392008-09-08 17:44:22 +02002452 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
Johannes Berg00d3f142009-02-10 21:26:00 +01002453 ieee80211_sta_set_ssid(sdata, bss->ssid,
2454 bss->ssid_len);
2455 ieee80211_sta_set_bssid(sdata, bss->cbss.bssid);
2456 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
2457 bss->supp_rates);
Jouni Malinenfdfacf02009-01-08 13:32:05 +02002458 if (sdata->u.sta.mfp == IEEE80211_MFP_REQUIRED)
2459 sdata->u.sta.flags |= IEEE80211_STA_MFP_ENABLED;
2460 else
2461 sdata->u.sta.flags &= ~IEEE80211_STA_MFP_ENABLED;
Johannes Berg60f8b392008-09-08 17:44:22 +02002462
2463 /* Send out direct probe if no probe resp was received or
2464 * the one we have is outdated
2465 */
Johannes Berg00d3f142009-02-10 21:26:00 +01002466 if (!bss->last_probe_resp ||
2467 time_after(jiffies, bss->last_probe_resp
Johannes Berg60f8b392008-09-08 17:44:22 +02002468 + IEEE80211_SCAN_RESULT_EXPIRE))
2469 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2470 else
2471 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2472
Johannes Berg00d3f142009-02-10 21:26:00 +01002473 ieee80211_rx_bss_put(local, bss);
Johannes Berg60f8b392008-09-08 17:44:22 +02002474 ieee80211_sta_reset_auth(sdata, ifsta);
2475 return 0;
2476 } else {
2477 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2478 ifsta->assoc_scan_tries++;
Johannes Berg2a519312009-02-10 21:25:55 +01002479 /* XXX maybe racy? */
2480 if (local->scan_req)
2481 return -1;
2482 memcpy(local->int_scan_req.ssids[0].ssid,
2483 ifsta->ssid, IEEE80211_MAX_SSID_LEN);
Johannes Berg60f8b392008-09-08 17:44:22 +02002484 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
Johannes Berg2a519312009-02-10 21:25:55 +01002485 local->int_scan_req.ssids[0].ssid_len = 0;
Johannes Berg60f8b392008-09-08 17:44:22 +02002486 else
Johannes Berg2a519312009-02-10 21:25:55 +01002487 local->int_scan_req.ssids[0].ssid_len = ifsta->ssid_len;
2488 ieee80211_start_scan(sdata, &local->int_scan_req);
Johannes Berg60f8b392008-09-08 17:44:22 +02002489 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2490 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
Sujithe3740552009-01-29 09:34:22 +05302491 } else {
2492 ifsta->assoc_scan_tries = 0;
Johannes Berg60f8b392008-09-08 17:44:22 +02002493 ifsta->state = IEEE80211_STA_MLME_DISABLED;
Sujithe3740552009-01-29 09:34:22 +05302494 }
Johannes Berg60f8b392008-09-08 17:44:22 +02002495 }
2496 return -1;
2497}
2498
2499
Johannes Berg9c6bd792008-09-11 00:01:52 +02002500static void ieee80211_sta_work(struct work_struct *work)
Johannes Berg60f8b392008-09-08 17:44:22 +02002501{
2502 struct ieee80211_sub_if_data *sdata =
2503 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2504 struct ieee80211_local *local = sdata->local;
2505 struct ieee80211_if_sta *ifsta;
2506 struct sk_buff *skb;
2507
2508 if (!netif_running(sdata->dev))
2509 return;
2510
Johannes Bergc2b13452008-09-11 00:01:55 +02002511 if (local->sw_scanning || local->hw_scanning)
Johannes Berg60f8b392008-09-08 17:44:22 +02002512 return;
2513
Johannes Berg05c914f2008-09-11 00:01:58 +02002514 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION &&
2515 sdata->vif.type != NL80211_IFTYPE_ADHOC))
Johannes Berg60f8b392008-09-08 17:44:22 +02002516 return;
2517 ifsta = &sdata->u.sta;
2518
2519 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2520 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2521
Johannes Berg60f8b392008-09-08 17:44:22 +02002522 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2523 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2524 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
2525 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
Johannes Berg2a519312009-02-10 21:25:55 +01002526 ieee80211_start_scan(sdata, local->scan_req);
Johannes Berg60f8b392008-09-08 17:44:22 +02002527 return;
2528 }
2529
2530 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2531 if (ieee80211_sta_config_auth(sdata, ifsta))
2532 return;
2533 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2534 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2535 return;
2536
2537 switch (ifsta->state) {
2538 case IEEE80211_STA_MLME_DISABLED:
2539 break;
2540 case IEEE80211_STA_MLME_DIRECT_PROBE:
2541 ieee80211_direct_probe(sdata, ifsta);
2542 break;
2543 case IEEE80211_STA_MLME_AUTHENTICATE:
2544 ieee80211_authenticate(sdata, ifsta);
2545 break;
2546 case IEEE80211_STA_MLME_ASSOCIATE:
2547 ieee80211_associate(sdata, ifsta);
2548 break;
2549 case IEEE80211_STA_MLME_ASSOCIATED:
2550 ieee80211_associated(sdata, ifsta);
2551 break;
2552 case IEEE80211_STA_MLME_IBSS_SEARCH:
2553 ieee80211_sta_find_ibss(sdata, ifsta);
2554 break;
2555 case IEEE80211_STA_MLME_IBSS_JOINED:
2556 ieee80211_sta_merge_ibss(sdata, ifsta);
2557 break;
Johannes Berg60f8b392008-09-08 17:44:22 +02002558 default:
2559 WARN_ON(1);
2560 break;
2561 }
2562
2563 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
2564 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2565 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2566
2567 ieee80211_set_disassoc(sdata, ifsta, false, true,
2568 WLAN_REASON_UNSPECIFIED);
2569 }
2570}
Johannes Berg0a51b272008-09-08 17:44:25 +02002571
Johannes Berga1678f82008-09-11 00:01:47 +02002572static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2573{
Johannes Berg05c914f2008-09-11 00:01:58 +02002574 if (sdata->vif.type == NL80211_IFTYPE_STATION)
Johannes Berg7c950692008-09-11 00:01:48 +02002575 queue_work(sdata->local->hw.workqueue,
2576 &sdata->u.sta.work);
Johannes Berga1678f82008-09-11 00:01:47 +02002577}
2578
Johannes Berg9c6bd792008-09-11 00:01:52 +02002579/* interface setup */
2580void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2581{
2582 struct ieee80211_if_sta *ifsta;
2583
2584 ifsta = &sdata->u.sta;
2585 INIT_WORK(&ifsta->work, ieee80211_sta_work);
Sujithc481ec92009-01-06 09:28:37 +05302586 INIT_WORK(&ifsta->chswitch_work, ieee80211_chswitch_work);
Johannes Berg9c6bd792008-09-11 00:01:52 +02002587 setup_timer(&ifsta->timer, ieee80211_sta_timer,
2588 (unsigned long) sdata);
Sujithc481ec92009-01-06 09:28:37 +05302589 setup_timer(&ifsta->chswitch_timer, ieee80211_chswitch_timer,
2590 (unsigned long) sdata);
Johannes Berg9c6bd792008-09-11 00:01:52 +02002591 skb_queue_head_init(&ifsta->skb_queue);
2592
2593 ifsta->capab = WLAN_CAPABILITY_ESS;
2594 ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2595 IEEE80211_AUTH_ALG_SHARED_KEY;
2596 ifsta->flags |= IEEE80211_STA_CREATE_IBSS |
2597 IEEE80211_STA_AUTO_BSSID_SEL |
2598 IEEE80211_STA_AUTO_CHANNEL_SEL;
2599 if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4)
2600 ifsta->flags |= IEEE80211_STA_WMM_ENABLED;
2601}
2602
2603/*
2604 * Add a new IBSS station, will also be called by the RX code when,
2605 * in IBSS mode, receiving a frame from a yet-unknown station, hence
2606 * must be callable in atomic context.
2607 */
2608struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
Johannes Berg881d9482009-01-21 15:13:48 +01002609 u8 *bssid,u8 *addr, u32 supp_rates)
Johannes Berg9c6bd792008-09-11 00:01:52 +02002610{
2611 struct ieee80211_local *local = sdata->local;
2612 struct sta_info *sta;
Johannes Berg9c6bd792008-09-11 00:01:52 +02002613 int band = local->hw.conf.channel->band;
2614
2615 /* TODO: Could consider removing the least recently used entry and
2616 * allow new one to be added. */
2617 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
2618 if (net_ratelimit()) {
2619 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
Johannes Berg0c68ae262008-10-27 15:56:10 -07002620 "entry %pM\n", sdata->dev->name, addr);
Johannes Berg9c6bd792008-09-11 00:01:52 +02002621 }
2622 return NULL;
2623 }
2624
2625 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
2626 return NULL;
2627
2628#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Johannes Berg0c68ae262008-10-27 15:56:10 -07002629 printk(KERN_DEBUG "%s: Adding new IBSS station %pM (dev=%s)\n",
2630 wiphy_name(local->hw.wiphy), addr, sdata->dev->name);
Johannes Berg9c6bd792008-09-11 00:01:52 +02002631#endif
2632
2633 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
2634 if (!sta)
2635 return NULL;
2636
2637 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
2638
2639 /* make sure mandatory rates are always added */
Johannes Berg323ce792008-09-11 02:45:11 +02002640 sta->sta.supp_rates[band] = supp_rates |
Johannes Berg96dd22a2008-09-11 00:01:57 +02002641 ieee80211_mandatory_rates(local, band);
Johannes Berg9c6bd792008-09-11 00:01:52 +02002642
Johannes Berg4b7679a2008-09-18 18:14:18 +02002643 rate_control_rate_init(sta);
Johannes Berg9c6bd792008-09-11 00:01:52 +02002644
2645 if (sta_info_insert(sta))
2646 return NULL;
2647
2648 return sta;
2649}
2650
2651/* configuration hooks */
2652void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
2653 struct ieee80211_if_sta *ifsta)
2654{
2655 struct ieee80211_local *local = sdata->local;
2656
Johannes Berg05c914f2008-09-11 00:01:58 +02002657 if (sdata->vif.type != NL80211_IFTYPE_STATION)
Johannes Berg9c6bd792008-09-11 00:01:52 +02002658 return;
2659
2660 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2661 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2662 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2663 IEEE80211_STA_AUTO_SSID_SEL))) {
2664
2665 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED)
2666 ieee80211_set_disassoc(sdata, ifsta, true, true,
2667 WLAN_REASON_DEAUTH_LEAVING);
2668
2669 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2670 queue_work(local->hw.workqueue, &ifsta->work);
2671 }
2672}
2673
2674int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2675{
2676 struct ieee80211_if_sta *ifsta;
Johannes Berg9c6bd792008-09-11 00:01:52 +02002677
2678 if (len > IEEE80211_MAX_SSID_LEN)
2679 return -EINVAL;
2680
2681 ifsta = &sdata->u.sta;
2682
2683 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
2684 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
2685 memcpy(ifsta->ssid, ssid, len);
2686 ifsta->ssid_len = len;
Johannes Berg9c6bd792008-09-11 00:01:52 +02002687 }
2688
Alina Friedrichsendfe67012009-01-24 01:19:04 +01002689 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2690
Johannes Berg9c6bd792008-09-11 00:01:52 +02002691 if (len)
2692 ifsta->flags |= IEEE80211_STA_SSID_SET;
2693 else
2694 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
2695
Alina Friedrichsendfe67012009-01-24 01:19:04 +01002696 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
Johannes Berg9c6bd792008-09-11 00:01:52 +02002697 ifsta->ibss_join_req = jiffies;
2698 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2699 return ieee80211_sta_find_ibss(sdata, ifsta);
2700 }
2701
2702 return 0;
2703}
2704
2705int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2706{
2707 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2708 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2709 *len = ifsta->ssid_len;
2710 return 0;
2711}
2712
2713int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2714{
2715 struct ieee80211_if_sta *ifsta;
Johannes Berg9c6bd792008-09-11 00:01:52 +02002716
2717 ifsta = &sdata->u.sta;
2718
Alina Friedrichsendfe67012009-01-24 01:19:04 +01002719 if (is_valid_ether_addr(bssid)) {
2720 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2721 ifsta->flags |= IEEE80211_STA_BSSID_SET;
2722 } else {
2723 memset(ifsta->bssid, 0, ETH_ALEN);
2724 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
2725 }
2726
2727 if (netif_running(sdata->dev)) {
2728 if (ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID)) {
Johannes Berg9c6bd792008-09-11 00:01:52 +02002729 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2730 "the low-level driver\n", sdata->dev->name);
Johannes Berg9c6bd792008-09-11 00:01:52 +02002731 }
2732 }
2733
Alina Friedrichsendfe67012009-01-24 01:19:04 +01002734 return ieee80211_sta_set_ssid(sdata, ifsta->ssid, ifsta->ssid_len);
Johannes Berg9c6bd792008-09-11 00:01:52 +02002735}
2736
2737int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
2738{
2739 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2740
2741 kfree(ifsta->extra_ie);
2742 if (len == 0) {
2743 ifsta->extra_ie = NULL;
2744 ifsta->extra_ie_len = 0;
2745 return 0;
2746 }
2747 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
2748 if (!ifsta->extra_ie) {
2749 ifsta->extra_ie_len = 0;
2750 return -ENOMEM;
2751 }
2752 memcpy(ifsta->extra_ie, ie, len);
2753 ifsta->extra_ie_len = len;
2754 return 0;
2755}
2756
2757int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2758{
2759 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2760
2761 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2762 sdata->dev->name, reason);
2763
Johannes Berg05c914f2008-09-11 00:01:58 +02002764 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
2765 sdata->vif.type != NL80211_IFTYPE_ADHOC)
Johannes Berg9c6bd792008-09-11 00:01:52 +02002766 return -EINVAL;
2767
2768 ieee80211_set_disassoc(sdata, ifsta, true, true, reason);
2769 return 0;
2770}
2771
2772int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2773{
2774 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2775
2776 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2777 sdata->dev->name, reason);
2778
Johannes Berg05c914f2008-09-11 00:01:58 +02002779 if (sdata->vif.type != NL80211_IFTYPE_STATION)
Johannes Berg9c6bd792008-09-11 00:01:52 +02002780 return -EINVAL;
2781
2782 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
2783 return -1;
2784
2785 ieee80211_set_disassoc(sdata, ifsta, false, true, reason);
2786 return 0;
2787}
2788
2789/* scan finished notification */
Johannes Berg0a51b272008-09-08 17:44:25 +02002790void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2791{
2792 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2793 struct ieee80211_if_sta *ifsta;
2794
Johannes Berg05c914f2008-09-11 00:01:58 +02002795 if (sdata && sdata->vif.type == NL80211_IFTYPE_ADHOC) {
Johannes Berg0a51b272008-09-08 17:44:25 +02002796 ifsta = &sdata->u.sta;
Alina Friedrichsenc0415b52009-01-29 09:59:43 +01002797 if ((!(ifsta->flags & IEEE80211_STA_PREV_BSSID_SET)) ||
2798 !ieee80211_sta_active_ibss(sdata))
Johannes Berg0a51b272008-09-08 17:44:25 +02002799 ieee80211_sta_find_ibss(sdata, ifsta);
2800 }
Johannes Berga1678f82008-09-11 00:01:47 +02002801
2802 /* Restart STA timers */
2803 rcu_read_lock();
2804 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2805 ieee80211_restart_sta_timer(sdata);
2806 rcu_read_unlock();
Johannes Berg0a51b272008-09-08 17:44:25 +02002807}
Kalle Valo520eb822008-12-18 23:35:27 +02002808
2809void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
2810{
2811 struct ieee80211_local *local =
2812 container_of(work, struct ieee80211_local,
2813 dynamic_ps_disable_work);
2814
2815 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2816 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2817 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2818 }
2819
2820 ieee80211_wake_queues_by_reason(&local->hw,
2821 IEEE80211_QUEUE_STOP_REASON_PS);
2822}
2823
2824void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
2825{
2826 struct ieee80211_local *local =
2827 container_of(work, struct ieee80211_local,
2828 dynamic_ps_enable_work);
Vivek Natarajana97b77b2008-12-23 18:39:02 -08002829 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
Kalle Valo520eb822008-12-18 23:35:27 +02002830
2831 if (local->hw.conf.flags & IEEE80211_CONF_PS)
2832 return;
2833
Johannes Berg4be8c382009-01-07 18:28:20 +01002834 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
2835 ieee80211_send_nullfunc(local, sdata, 1);
Kalle Valo520eb822008-12-18 23:35:27 +02002836
Johannes Berg4be8c382009-01-07 18:28:20 +01002837 local->hw.conf.flags |= IEEE80211_CONF_PS;
Kalle Valo520eb822008-12-18 23:35:27 +02002838 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2839}
2840
2841void ieee80211_dynamic_ps_timer(unsigned long data)
2842{
2843 struct ieee80211_local *local = (void *) data;
2844
2845 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
2846}