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mac80211: consolidate deauth/disassoc
[deliverable/linux.git] / net / mac80211 / mlme.c
1 /*
2 * BSS client mode implementation
3 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/netdevice.h>
18 #include <linux/if_arp.h>
19 #include <linux/wireless.h>
20 #include <linux/random.h>
21 #include <linux/etherdevice.h>
22 #include <linux/rtnetlink.h>
23 #include <net/iw_handler.h>
24 #include <net/mac80211.h>
25
26 #include "ieee80211_i.h"
27 #include "rate.h"
28 #include "led.h"
29 #include "mesh.h"
30
31 #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
32 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
33 #define IEEE80211_AUTH_MAX_TRIES 3
34 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
35 #define IEEE80211_ASSOC_MAX_TRIES 3
36 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
37 #define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
38 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
39 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
40 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
41 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
42 #define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
43
44 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
45 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
46 #define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
47
48 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
49
50
51 /* utils */
52 static int ecw2cw(int ecw)
53 {
54 return (1 << ecw) - 1;
55 }
56
57 static u8 *ieee80211_bss_get_ie(struct ieee80211_sta_bss *bss, u8 ie)
58 {
59 u8 *end, *pos;
60
61 pos = bss->ies;
62 if (pos == NULL)
63 return NULL;
64 end = pos + bss->ies_len;
65
66 while (pos + 1 < end) {
67 if (pos + 2 + pos[1] > end)
68 break;
69 if (pos[0] == ie)
70 return pos;
71 pos += 2 + pos[1];
72 }
73
74 return NULL;
75 }
76
77 static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss,
78 struct ieee80211_supported_band *sband,
79 u64 *rates)
80 {
81 int i, j, count;
82 *rates = 0;
83 count = 0;
84 for (i = 0; i < bss->supp_rates_len; i++) {
85 int rate = (bss->supp_rates[i] & 0x7F) * 5;
86
87 for (j = 0; j < sband->n_bitrates; j++)
88 if (sband->bitrates[j].bitrate == rate) {
89 *rates |= BIT(j);
90 count++;
91 break;
92 }
93 }
94
95 return count;
96 }
97
98 /* frame sending functions */
99 void ieee80211_sta_tx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
100 int encrypt)
101 {
102 skb->dev = sdata->local->mdev;
103 skb_set_mac_header(skb, 0);
104 skb_set_network_header(skb, 0);
105 skb_set_transport_header(skb, 0);
106
107 skb->iif = sdata->dev->ifindex;
108 skb->do_not_encrypt = !encrypt;
109
110 dev_queue_xmit(skb);
111 }
112
113 static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
114 struct ieee80211_if_sta *ifsta,
115 int transaction, u8 *extra, size_t extra_len,
116 int encrypt)
117 {
118 struct ieee80211_local *local = sdata->local;
119 struct sk_buff *skb;
120 struct ieee80211_mgmt *mgmt;
121
122 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
123 sizeof(*mgmt) + 6 + extra_len);
124 if (!skb) {
125 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
126 "frame\n", sdata->dev->name);
127 return;
128 }
129 skb_reserve(skb, local->hw.extra_tx_headroom);
130
131 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
132 memset(mgmt, 0, 24 + 6);
133 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
134 IEEE80211_STYPE_AUTH);
135 if (encrypt)
136 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
137 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
138 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
139 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
140 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
141 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
142 ifsta->auth_transaction = transaction + 1;
143 mgmt->u.auth.status_code = cpu_to_le16(0);
144 if (extra)
145 memcpy(skb_put(skb, extra_len), extra, extra_len);
146
147 ieee80211_sta_tx(sdata, skb, encrypt);
148 }
149
150 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
151 u8 *ssid, size_t ssid_len)
152 {
153 struct ieee80211_local *local = sdata->local;
154 struct ieee80211_supported_band *sband;
155 struct sk_buff *skb;
156 struct ieee80211_mgmt *mgmt;
157 u8 *pos, *supp_rates, *esupp_rates = NULL;
158 int i;
159
160 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
161 if (!skb) {
162 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
163 "request\n", sdata->dev->name);
164 return;
165 }
166 skb_reserve(skb, local->hw.extra_tx_headroom);
167
168 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
169 memset(mgmt, 0, 24);
170 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
171 IEEE80211_STYPE_PROBE_REQ);
172 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
173 if (dst) {
174 memcpy(mgmt->da, dst, ETH_ALEN);
175 memcpy(mgmt->bssid, dst, ETH_ALEN);
176 } else {
177 memset(mgmt->da, 0xff, ETH_ALEN);
178 memset(mgmt->bssid, 0xff, ETH_ALEN);
179 }
180 pos = skb_put(skb, 2 + ssid_len);
181 *pos++ = WLAN_EID_SSID;
182 *pos++ = ssid_len;
183 memcpy(pos, ssid, ssid_len);
184
185 supp_rates = skb_put(skb, 2);
186 supp_rates[0] = WLAN_EID_SUPP_RATES;
187 supp_rates[1] = 0;
188 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
189
190 for (i = 0; i < sband->n_bitrates; i++) {
191 struct ieee80211_rate *rate = &sband->bitrates[i];
192 if (esupp_rates) {
193 pos = skb_put(skb, 1);
194 esupp_rates[1]++;
195 } else if (supp_rates[1] == 8) {
196 esupp_rates = skb_put(skb, 3);
197 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
198 esupp_rates[1] = 1;
199 pos = &esupp_rates[2];
200 } else {
201 pos = skb_put(skb, 1);
202 supp_rates[1]++;
203 }
204 *pos = rate->bitrate / 5;
205 }
206
207 ieee80211_sta_tx(sdata, skb, 0);
208 }
209
210 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
211 struct ieee80211_if_sta *ifsta)
212 {
213 struct ieee80211_local *local = sdata->local;
214 struct sk_buff *skb;
215 struct ieee80211_mgmt *mgmt;
216 u8 *pos, *ies, *ht_add_ie;
217 int i, len, count, rates_len, supp_rates_len;
218 u16 capab;
219 struct ieee80211_sta_bss *bss;
220 int wmm = 0;
221 struct ieee80211_supported_band *sband;
222 u64 rates = 0;
223
224 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
225 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
226 ifsta->ssid_len);
227 if (!skb) {
228 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
229 "frame\n", sdata->dev->name);
230 return;
231 }
232 skb_reserve(skb, local->hw.extra_tx_headroom);
233
234 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
235
236 capab = ifsta->capab;
237
238 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
239 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
240 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
241 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
242 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
243 }
244
245 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
246 local->hw.conf.channel->center_freq,
247 ifsta->ssid, ifsta->ssid_len);
248 if (bss) {
249 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
250 capab |= WLAN_CAPABILITY_PRIVACY;
251 if (bss->wmm_used)
252 wmm = 1;
253
254 /* get all rates supported by the device and the AP as
255 * some APs don't like getting a superset of their rates
256 * in the association request (e.g. D-Link DAP 1353 in
257 * b-only mode) */
258 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
259
260 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
261 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
262 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
263
264 ieee80211_rx_bss_put(local, bss);
265 } else {
266 rates = ~0;
267 rates_len = sband->n_bitrates;
268 }
269
270 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
271 memset(mgmt, 0, 24);
272 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
273 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
274 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
275
276 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
277 skb_put(skb, 10);
278 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
279 IEEE80211_STYPE_REASSOC_REQ);
280 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
281 mgmt->u.reassoc_req.listen_interval =
282 cpu_to_le16(local->hw.conf.listen_interval);
283 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
284 ETH_ALEN);
285 } else {
286 skb_put(skb, 4);
287 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
288 IEEE80211_STYPE_ASSOC_REQ);
289 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
290 mgmt->u.reassoc_req.listen_interval =
291 cpu_to_le16(local->hw.conf.listen_interval);
292 }
293
294 /* SSID */
295 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
296 *pos++ = WLAN_EID_SSID;
297 *pos++ = ifsta->ssid_len;
298 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
299
300 /* add all rates which were marked to be used above */
301 supp_rates_len = rates_len;
302 if (supp_rates_len > 8)
303 supp_rates_len = 8;
304
305 len = sband->n_bitrates;
306 pos = skb_put(skb, supp_rates_len + 2);
307 *pos++ = WLAN_EID_SUPP_RATES;
308 *pos++ = supp_rates_len;
309
310 count = 0;
311 for (i = 0; i < sband->n_bitrates; i++) {
312 if (BIT(i) & rates) {
313 int rate = sband->bitrates[i].bitrate;
314 *pos++ = (u8) (rate / 5);
315 if (++count == 8)
316 break;
317 }
318 }
319
320 if (rates_len > count) {
321 pos = skb_put(skb, rates_len - count + 2);
322 *pos++ = WLAN_EID_EXT_SUPP_RATES;
323 *pos++ = rates_len - count;
324
325 for (i++; i < sband->n_bitrates; i++) {
326 if (BIT(i) & rates) {
327 int rate = sband->bitrates[i].bitrate;
328 *pos++ = (u8) (rate / 5);
329 }
330 }
331 }
332
333 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
334 /* 1. power capabilities */
335 pos = skb_put(skb, 4);
336 *pos++ = WLAN_EID_PWR_CAPABILITY;
337 *pos++ = 2;
338 *pos++ = 0; /* min tx power */
339 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
340
341 /* 2. supported channels */
342 /* TODO: get this in reg domain format */
343 pos = skb_put(skb, 2 * sband->n_channels + 2);
344 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
345 *pos++ = 2 * sband->n_channels;
346 for (i = 0; i < sband->n_channels; i++) {
347 *pos++ = ieee80211_frequency_to_channel(
348 sband->channels[i].center_freq);
349 *pos++ = 1; /* one channel in the subband*/
350 }
351 }
352
353 if (ifsta->extra_ie) {
354 pos = skb_put(skb, ifsta->extra_ie_len);
355 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
356 }
357
358 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
359 pos = skb_put(skb, 9);
360 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
361 *pos++ = 7; /* len */
362 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
363 *pos++ = 0x50;
364 *pos++ = 0xf2;
365 *pos++ = 2; /* WME */
366 *pos++ = 0; /* WME info */
367 *pos++ = 1; /* WME ver */
368 *pos++ = 0;
369 }
370
371 /* wmm support is a must to HT */
372 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
373 sband->ht_info.ht_supported &&
374 (ht_add_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_EXTRA_INFO))) {
375 struct ieee80211_ht_addt_info *ht_add_info =
376 (struct ieee80211_ht_addt_info *)ht_add_ie;
377 u16 cap = sband->ht_info.cap;
378 __le16 tmp;
379 u32 flags = local->hw.conf.channel->flags;
380
381 switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) {
382 case IEEE80211_HT_IE_CHA_SEC_ABOVE:
383 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
384 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
385 cap &= ~IEEE80211_HT_CAP_SGI_40;
386 }
387 break;
388 case IEEE80211_HT_IE_CHA_SEC_BELOW:
389 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
390 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
391 cap &= ~IEEE80211_HT_CAP_SGI_40;
392 }
393 break;
394 }
395
396 tmp = cpu_to_le16(cap);
397 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
398 *pos++ = WLAN_EID_HT_CAPABILITY;
399 *pos++ = sizeof(struct ieee80211_ht_cap);
400 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
401 memcpy(pos, &tmp, sizeof(u16));
402 pos += sizeof(u16);
403 /* TODO: needs a define here for << 2 */
404 *pos++ = sband->ht_info.ampdu_factor |
405 (sband->ht_info.ampdu_density << 2);
406 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
407 }
408
409 kfree(ifsta->assocreq_ies);
410 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
411 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
412 if (ifsta->assocreq_ies)
413 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
414
415 ieee80211_sta_tx(sdata, skb, 0);
416 }
417
418
419 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
420 u16 stype, u16 reason)
421 {
422 struct ieee80211_local *local = sdata->local;
423 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
424 struct sk_buff *skb;
425 struct ieee80211_mgmt *mgmt;
426
427 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
428 if (!skb) {
429 printk(KERN_DEBUG "%s: failed to allocate buffer for "
430 "deauth/disassoc frame\n", sdata->dev->name);
431 return;
432 }
433 skb_reserve(skb, local->hw.extra_tx_headroom);
434
435 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
436 memset(mgmt, 0, 24);
437 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
438 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
439 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
440 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
441 skb_put(skb, 2);
442 /* u.deauth.reason_code == u.disassoc.reason_code */
443 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
444
445 ieee80211_sta_tx(sdata, skb, 0);
446 }
447
448 static void ieee80211_send_addba_resp(struct ieee80211_sub_if_data *sdata, u8 *da, u16 tid,
449 u8 dialog_token, u16 status, u16 policy,
450 u16 buf_size, u16 timeout)
451 {
452 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
453 struct ieee80211_local *local = sdata->local;
454 struct sk_buff *skb;
455 struct ieee80211_mgmt *mgmt;
456 u16 capab;
457
458 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
459
460 if (!skb) {
461 printk(KERN_DEBUG "%s: failed to allocate buffer "
462 "for addba resp frame\n", sdata->dev->name);
463 return;
464 }
465
466 skb_reserve(skb, local->hw.extra_tx_headroom);
467 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
468 memset(mgmt, 0, 24);
469 memcpy(mgmt->da, da, ETH_ALEN);
470 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
471 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
472 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
473 else
474 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
475 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
476 IEEE80211_STYPE_ACTION);
477
478 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
479 mgmt->u.action.category = WLAN_CATEGORY_BACK;
480 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
481 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
482
483 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
484 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
485 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
486
487 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
488 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
489 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
490
491 ieee80211_sta_tx(sdata, skb, 0);
492 }
493
494 static void ieee80211_send_refuse_measurement_request(struct ieee80211_sub_if_data *sdata,
495 struct ieee80211_msrment_ie *request_ie,
496 const u8 *da, const u8 *bssid,
497 u8 dialog_token)
498 {
499 struct ieee80211_local *local = sdata->local;
500 struct sk_buff *skb;
501 struct ieee80211_mgmt *msr_report;
502
503 skb = dev_alloc_skb(sizeof(*msr_report) + local->hw.extra_tx_headroom +
504 sizeof(struct ieee80211_msrment_ie));
505
506 if (!skb) {
507 printk(KERN_ERR "%s: failed to allocate buffer for "
508 "measurement report frame\n", sdata->dev->name);
509 return;
510 }
511
512 skb_reserve(skb, local->hw.extra_tx_headroom);
513 msr_report = (struct ieee80211_mgmt *)skb_put(skb, 24);
514 memset(msr_report, 0, 24);
515 memcpy(msr_report->da, da, ETH_ALEN);
516 memcpy(msr_report->sa, sdata->dev->dev_addr, ETH_ALEN);
517 memcpy(msr_report->bssid, bssid, ETH_ALEN);
518 msr_report->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
519 IEEE80211_STYPE_ACTION);
520
521 skb_put(skb, 1 + sizeof(msr_report->u.action.u.measurement));
522 msr_report->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
523 msr_report->u.action.u.measurement.action_code =
524 WLAN_ACTION_SPCT_MSR_RPRT;
525 msr_report->u.action.u.measurement.dialog_token = dialog_token;
526
527 msr_report->u.action.u.measurement.element_id = WLAN_EID_MEASURE_REPORT;
528 msr_report->u.action.u.measurement.length =
529 sizeof(struct ieee80211_msrment_ie);
530
531 memset(&msr_report->u.action.u.measurement.msr_elem, 0,
532 sizeof(struct ieee80211_msrment_ie));
533 msr_report->u.action.u.measurement.msr_elem.token = request_ie->token;
534 msr_report->u.action.u.measurement.msr_elem.mode |=
535 IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED;
536 msr_report->u.action.u.measurement.msr_elem.type = request_ie->type;
537
538 ieee80211_sta_tx(sdata, skb, 0);
539 }
540
541 /* MLME */
542 static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
543 struct ieee80211_sta_bss *bss)
544 {
545 struct ieee80211_local *local = sdata->local;
546 int i, have_higher_than_11mbit = 0;
547
548
549 /* cf. IEEE 802.11 9.2.12 */
550 for (i = 0; i < bss->supp_rates_len; i++)
551 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
552 have_higher_than_11mbit = 1;
553
554 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
555 have_higher_than_11mbit)
556 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
557 else
558 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
559
560
561 if (local->ops->conf_tx) {
562 struct ieee80211_tx_queue_params qparam;
563
564 memset(&qparam, 0, sizeof(qparam));
565
566 qparam.aifs = 2;
567
568 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
569 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
570 qparam.cw_min = 31;
571 else
572 qparam.cw_min = 15;
573
574 qparam.cw_max = 1023;
575 qparam.txop = 0;
576
577 for (i = 0; i < local_to_hw(local)->queues; i++)
578 local->ops->conf_tx(local_to_hw(local), i, &qparam);
579 }
580 }
581
582 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
583 struct ieee80211_if_sta *ifsta,
584 u8 *wmm_param, size_t wmm_param_len)
585 {
586 struct ieee80211_tx_queue_params params;
587 size_t left;
588 int count;
589 u8 *pos;
590
591 if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
592 return;
593
594 if (!wmm_param)
595 return;
596
597 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
598 return;
599 count = wmm_param[6] & 0x0f;
600 if (count == ifsta->wmm_last_param_set)
601 return;
602 ifsta->wmm_last_param_set = count;
603
604 pos = wmm_param + 8;
605 left = wmm_param_len - 8;
606
607 memset(&params, 0, sizeof(params));
608
609 if (!local->ops->conf_tx)
610 return;
611
612 local->wmm_acm = 0;
613 for (; left >= 4; left -= 4, pos += 4) {
614 int aci = (pos[0] >> 5) & 0x03;
615 int acm = (pos[0] >> 4) & 0x01;
616 int queue;
617
618 switch (aci) {
619 case 1:
620 queue = 3;
621 if (acm)
622 local->wmm_acm |= BIT(0) | BIT(3);
623 break;
624 case 2:
625 queue = 1;
626 if (acm)
627 local->wmm_acm |= BIT(4) | BIT(5);
628 break;
629 case 3:
630 queue = 0;
631 if (acm)
632 local->wmm_acm |= BIT(6) | BIT(7);
633 break;
634 case 0:
635 default:
636 queue = 2;
637 if (acm)
638 local->wmm_acm |= BIT(1) | BIT(2);
639 break;
640 }
641
642 params.aifs = pos[0] & 0x0f;
643 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
644 params.cw_min = ecw2cw(pos[1] & 0x0f);
645 params.txop = get_unaligned_le16(pos + 2);
646 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
647 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
648 "cWmin=%d cWmax=%d txop=%d\n",
649 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
650 params.cw_max, params.txop);
651 #endif
652 /* TODO: handle ACM (block TX, fallback to next lowest allowed
653 * AC for now) */
654 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
655 printk(KERN_DEBUG "%s: failed to set TX queue "
656 "parameters for queue %d\n", local->mdev->name, queue);
657 }
658 }
659 }
660
661 static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
662 bool use_protection,
663 bool use_short_preamble)
664 {
665 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
666 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
667 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
668 DECLARE_MAC_BUF(mac);
669 #endif
670 u32 changed = 0;
671
672 if (use_protection != bss_conf->use_cts_prot) {
673 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
674 if (net_ratelimit()) {
675 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
676 "%s)\n",
677 sdata->dev->name,
678 use_protection ? "enabled" : "disabled",
679 print_mac(mac, ifsta->bssid));
680 }
681 #endif
682 bss_conf->use_cts_prot = use_protection;
683 changed |= BSS_CHANGED_ERP_CTS_PROT;
684 }
685
686 if (use_short_preamble != bss_conf->use_short_preamble) {
687 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
688 if (net_ratelimit()) {
689 printk(KERN_DEBUG "%s: switched to %s barker preamble"
690 " (BSSID=%s)\n",
691 sdata->dev->name,
692 use_short_preamble ? "short" : "long",
693 print_mac(mac, ifsta->bssid));
694 }
695 #endif
696 bss_conf->use_short_preamble = use_short_preamble;
697 changed |= BSS_CHANGED_ERP_PREAMBLE;
698 }
699
700 return changed;
701 }
702
703 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
704 u8 erp_value)
705 {
706 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
707 bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
708
709 return ieee80211_handle_protect_preamb(sdata,
710 use_protection, use_short_preamble);
711 }
712
713 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
714 struct ieee80211_sta_bss *bss)
715 {
716 u32 changed = 0;
717
718 if (bss->has_erp_value)
719 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
720 else {
721 u16 capab = bss->capability;
722 changed |= ieee80211_handle_protect_preamb(sdata, false,
723 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
724 }
725
726 return changed;
727 }
728
729 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata,
730 struct ieee80211_if_sta *ifsta)
731 {
732 union iwreq_data wrqu;
733 memset(&wrqu, 0, sizeof(wrqu));
734 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
735 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
736 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
737 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
738 }
739
740 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata,
741 struct ieee80211_if_sta *ifsta)
742 {
743 union iwreq_data wrqu;
744
745 if (ifsta->assocreq_ies) {
746 memset(&wrqu, 0, sizeof(wrqu));
747 wrqu.data.length = ifsta->assocreq_ies_len;
748 wireless_send_event(sdata->dev, IWEVASSOCREQIE, &wrqu,
749 ifsta->assocreq_ies);
750 }
751 if (ifsta->assocresp_ies) {
752 memset(&wrqu, 0, sizeof(wrqu));
753 wrqu.data.length = ifsta->assocresp_ies_len;
754 wireless_send_event(sdata->dev, IWEVASSOCRESPIE, &wrqu,
755 ifsta->assocresp_ies);
756 }
757 }
758
759
760 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
761 struct ieee80211_if_sta *ifsta)
762 {
763 struct ieee80211_local *local = sdata->local;
764 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
765 u32 changed = BSS_CHANGED_ASSOC;
766
767 struct ieee80211_sta_bss *bss;
768
769 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
770
771 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
772 return;
773
774 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
775 conf->channel->center_freq,
776 ifsta->ssid, ifsta->ssid_len);
777 if (bss) {
778 /* set timing information */
779 sdata->bss_conf.beacon_int = bss->beacon_int;
780 sdata->bss_conf.timestamp = bss->timestamp;
781 sdata->bss_conf.dtim_period = bss->dtim_period;
782
783 changed |= ieee80211_handle_bss_capability(sdata, bss);
784
785 ieee80211_rx_bss_put(local, bss);
786 }
787
788 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
789 changed |= BSS_CHANGED_HT;
790 sdata->bss_conf.assoc_ht = 1;
791 sdata->bss_conf.ht_conf = &conf->ht_conf;
792 sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
793 }
794
795 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
796 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
797 ieee80211_sta_send_associnfo(sdata, ifsta);
798
799 ifsta->last_probe = jiffies;
800 ieee80211_led_assoc(local, 1);
801
802 sdata->bss_conf.assoc = 1;
803 ieee80211_bss_info_change_notify(sdata, changed);
804
805 netif_tx_start_all_queues(sdata->dev);
806 netif_carrier_on(sdata->dev);
807
808 ieee80211_sta_send_apinfo(sdata, ifsta);
809 }
810
811 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
812 struct ieee80211_if_sta *ifsta)
813 {
814 DECLARE_MAC_BUF(mac);
815
816 ifsta->direct_probe_tries++;
817 if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
818 printk(KERN_DEBUG "%s: direct probe to AP %s timed out\n",
819 sdata->dev->name, print_mac(mac, ifsta->bssid));
820 ifsta->state = IEEE80211_STA_MLME_DISABLED;
821 return;
822 }
823
824 printk(KERN_DEBUG "%s: direct probe to AP %s try %d\n",
825 sdata->dev->name, print_mac(mac, ifsta->bssid),
826 ifsta->direct_probe_tries);
827
828 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
829
830 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request);
831
832 /* Direct probe is sent to broadcast address as some APs
833 * will not answer to direct packet in unassociated state.
834 */
835 ieee80211_send_probe_req(sdata, NULL,
836 ifsta->ssid, ifsta->ssid_len);
837
838 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
839 }
840
841
842 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
843 struct ieee80211_if_sta *ifsta)
844 {
845 DECLARE_MAC_BUF(mac);
846
847 ifsta->auth_tries++;
848 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
849 printk(KERN_DEBUG "%s: authentication with AP %s"
850 " timed out\n",
851 sdata->dev->name, print_mac(mac, ifsta->bssid));
852 ifsta->state = IEEE80211_STA_MLME_DISABLED;
853 return;
854 }
855
856 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
857 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
858 sdata->dev->name, print_mac(mac, ifsta->bssid));
859
860 ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
861
862 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
863 }
864
865 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
866 struct ieee80211_if_sta *ifsta, bool deauth,
867 bool self_disconnected, u16 reason)
868 {
869 struct ieee80211_local *local = sdata->local;
870 struct sta_info *sta;
871 u32 changed = BSS_CHANGED_ASSOC;
872
873 rcu_read_lock();
874
875 sta = sta_info_get(local, ifsta->bssid);
876 if (!sta) {
877 rcu_read_unlock();
878 return;
879 }
880
881 if (deauth) {
882 ifsta->direct_probe_tries = 0;
883 ifsta->auth_tries = 0;
884 }
885 ifsta->assoc_scan_tries = 0;
886 ifsta->assoc_tries = 0;
887
888 netif_tx_stop_all_queues(sdata->dev);
889 netif_carrier_off(sdata->dev);
890
891 ieee80211_sta_tear_down_BA_sessions(sdata, sta->addr);
892
893 if (self_disconnected) {
894 if (deauth)
895 ieee80211_send_deauth_disassoc(sdata,
896 IEEE80211_STYPE_DEAUTH, reason);
897 else
898 ieee80211_send_deauth_disassoc(sdata,
899 IEEE80211_STYPE_DISASSOC, reason);
900 }
901
902 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
903 changed |= ieee80211_reset_erp_info(sdata);
904
905 if (sdata->bss_conf.assoc_ht)
906 changed |= BSS_CHANGED_HT;
907
908 sdata->bss_conf.assoc_ht = 0;
909 sdata->bss_conf.ht_conf = NULL;
910 sdata->bss_conf.ht_bss_conf = NULL;
911
912 ieee80211_led_assoc(local, 0);
913 sdata->bss_conf.assoc = 0;
914
915 ieee80211_sta_send_apinfo(sdata, ifsta);
916
917 if (self_disconnected)
918 ifsta->state = IEEE80211_STA_MLME_DISABLED;
919
920 sta_info_unlink(&sta);
921
922 rcu_read_unlock();
923
924 sta_info_destroy(sta);
925 }
926
927 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
928 {
929 if (!sdata || !sdata->default_key ||
930 sdata->default_key->conf.alg != ALG_WEP)
931 return 0;
932 return 1;
933 }
934
935 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
936 struct ieee80211_if_sta *ifsta)
937 {
938 struct ieee80211_local *local = sdata->local;
939 struct ieee80211_sta_bss *bss;
940 int bss_privacy;
941 int wep_privacy;
942 int privacy_invoked;
943
944 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
945 return 0;
946
947 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
948 local->hw.conf.channel->center_freq,
949 ifsta->ssid, ifsta->ssid_len);
950 if (!bss)
951 return 0;
952
953 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
954 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
955 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
956
957 ieee80211_rx_bss_put(local, bss);
958
959 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
960 return 0;
961
962 return 1;
963 }
964
965 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
966 struct ieee80211_if_sta *ifsta)
967 {
968 DECLARE_MAC_BUF(mac);
969
970 ifsta->assoc_tries++;
971 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
972 printk(KERN_DEBUG "%s: association with AP %s"
973 " timed out\n",
974 sdata->dev->name, print_mac(mac, ifsta->bssid));
975 ifsta->state = IEEE80211_STA_MLME_DISABLED;
976 return;
977 }
978
979 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
980 printk(KERN_DEBUG "%s: associate with AP %s\n",
981 sdata->dev->name, print_mac(mac, ifsta->bssid));
982 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
983 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
984 "mixed-cell disabled - abort association\n", sdata->dev->name);
985 ifsta->state = IEEE80211_STA_MLME_DISABLED;
986 return;
987 }
988
989 ieee80211_send_assoc(sdata, ifsta);
990
991 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
992 }
993
994
995 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
996 struct ieee80211_if_sta *ifsta)
997 {
998 struct ieee80211_local *local = sdata->local;
999 struct sta_info *sta;
1000 int disassoc;
1001 DECLARE_MAC_BUF(mac);
1002
1003 /* TODO: start monitoring current AP signal quality and number of
1004 * missed beacons. Scan other channels every now and then and search
1005 * for better APs. */
1006 /* TODO: remove expired BSSes */
1007
1008 ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
1009
1010 rcu_read_lock();
1011
1012 sta = sta_info_get(local, ifsta->bssid);
1013 if (!sta) {
1014 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
1015 sdata->dev->name, print_mac(mac, ifsta->bssid));
1016 disassoc = 1;
1017 } else {
1018 disassoc = 0;
1019 if (time_after(jiffies,
1020 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
1021 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
1022 printk(KERN_DEBUG "%s: No ProbeResp from "
1023 "current AP %s - assume out of "
1024 "range\n",
1025 sdata->dev->name, print_mac(mac, ifsta->bssid));
1026 disassoc = 1;
1027 } else
1028 ieee80211_send_probe_req(sdata, ifsta->bssid,
1029 local->scan_ssid,
1030 local->scan_ssid_len);
1031 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
1032 } else {
1033 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1034 if (time_after(jiffies, ifsta->last_probe +
1035 IEEE80211_PROBE_INTERVAL)) {
1036 ifsta->last_probe = jiffies;
1037 ieee80211_send_probe_req(sdata, ifsta->bssid,
1038 ifsta->ssid,
1039 ifsta->ssid_len);
1040 }
1041 }
1042 }
1043
1044 rcu_read_unlock();
1045
1046 if (disassoc)
1047 ieee80211_set_disassoc(sdata, ifsta, true, true,
1048 WLAN_REASON_PREV_AUTH_NOT_VALID);
1049 else
1050 mod_timer(&ifsta->timer, jiffies +
1051 IEEE80211_MONITORING_INTERVAL);
1052 }
1053
1054
1055 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
1056 struct ieee80211_if_sta *ifsta)
1057 {
1058 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1059 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1060 ieee80211_associate(sdata, ifsta);
1061 }
1062
1063
1064 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1065 struct ieee80211_if_sta *ifsta,
1066 struct ieee80211_mgmt *mgmt,
1067 size_t len)
1068 {
1069 u8 *pos;
1070 struct ieee802_11_elems elems;
1071
1072 pos = mgmt->u.auth.variable;
1073 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1074 if (!elems.challenge)
1075 return;
1076 ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
1077 elems.challenge_len + 2, 1);
1078 }
1079
1080 /*
1081 * After accepting the AddBA Request we activated a timer,
1082 * resetting it after each frame that arrives from the originator.
1083 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1084 */
1085 static void sta_rx_agg_session_timer_expired(unsigned long data)
1086 {
1087 /* not an elegant detour, but there is no choice as the timer passes
1088 * only one argument, and various sta_info are needed here, so init
1089 * flow in sta_info_create gives the TID as data, while the timer_to_id
1090 * array gives the sta through container_of */
1091 u8 *ptid = (u8 *)data;
1092 u8 *timer_to_id = ptid - *ptid;
1093 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1094 timer_to_tid[0]);
1095
1096 #ifdef CONFIG_MAC80211_HT_DEBUG
1097 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1098 #endif
1099 ieee80211_sta_stop_rx_ba_session(sta->sdata, sta->addr,
1100 (u16)*ptid, WLAN_BACK_TIMER,
1101 WLAN_REASON_QSTA_TIMEOUT);
1102 }
1103
1104 static void ieee80211_sta_process_addba_request(struct ieee80211_local *local,
1105 struct ieee80211_mgmt *mgmt,
1106 size_t len)
1107 {
1108 struct ieee80211_hw *hw = &local->hw;
1109 struct ieee80211_conf *conf = &hw->conf;
1110 struct sta_info *sta;
1111 struct tid_ampdu_rx *tid_agg_rx;
1112 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1113 u8 dialog_token;
1114 int ret = -EOPNOTSUPP;
1115 DECLARE_MAC_BUF(mac);
1116
1117 rcu_read_lock();
1118
1119 sta = sta_info_get(local, mgmt->sa);
1120 if (!sta) {
1121 rcu_read_unlock();
1122 return;
1123 }
1124
1125 /* extract session parameters from addba request frame */
1126 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1127 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1128 start_seq_num =
1129 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1130
1131 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1132 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1133 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1134 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1135
1136 status = WLAN_STATUS_REQUEST_DECLINED;
1137
1138 /* sanity check for incoming parameters:
1139 * check if configuration can support the BA policy
1140 * and if buffer size does not exceeds max value */
1141 if (((ba_policy != 1)
1142 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1143 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1144 status = WLAN_STATUS_INVALID_QOS_PARAM;
1145 #ifdef CONFIG_MAC80211_HT_DEBUG
1146 if (net_ratelimit())
1147 printk(KERN_DEBUG "AddBA Req with bad params from "
1148 "%s on tid %u. policy %d, buffer size %d\n",
1149 print_mac(mac, mgmt->sa), tid, ba_policy,
1150 buf_size);
1151 #endif /* CONFIG_MAC80211_HT_DEBUG */
1152 goto end_no_lock;
1153 }
1154 /* determine default buffer size */
1155 if (buf_size == 0) {
1156 struct ieee80211_supported_band *sband;
1157
1158 sband = local->hw.wiphy->bands[conf->channel->band];
1159 buf_size = IEEE80211_MIN_AMPDU_BUF;
1160 buf_size = buf_size << sband->ht_info.ampdu_factor;
1161 }
1162
1163
1164 /* examine state machine */
1165 spin_lock_bh(&sta->lock);
1166
1167 if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
1168 #ifdef CONFIG_MAC80211_HT_DEBUG
1169 if (net_ratelimit())
1170 printk(KERN_DEBUG "unexpected AddBA Req from "
1171 "%s on tid %u\n",
1172 print_mac(mac, mgmt->sa), tid);
1173 #endif /* CONFIG_MAC80211_HT_DEBUG */
1174 goto end;
1175 }
1176
1177 /* prepare A-MPDU MLME for Rx aggregation */
1178 sta->ampdu_mlme.tid_rx[tid] =
1179 kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1180 if (!sta->ampdu_mlme.tid_rx[tid]) {
1181 #ifdef CONFIG_MAC80211_HT_DEBUG
1182 if (net_ratelimit())
1183 printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1184 tid);
1185 #endif
1186 goto end;
1187 }
1188 /* rx timer */
1189 sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1190 sta_rx_agg_session_timer_expired;
1191 sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1192 (unsigned long)&sta->timer_to_tid[tid];
1193 init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1194
1195 tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1196
1197 /* prepare reordering buffer */
1198 tid_agg_rx->reorder_buf =
1199 kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC);
1200 if (!tid_agg_rx->reorder_buf) {
1201 #ifdef CONFIG_MAC80211_HT_DEBUG
1202 if (net_ratelimit())
1203 printk(KERN_ERR "can not allocate reordering buffer "
1204 "to tid %d\n", tid);
1205 #endif
1206 kfree(sta->ampdu_mlme.tid_rx[tid]);
1207 goto end;
1208 }
1209 memset(tid_agg_rx->reorder_buf, 0,
1210 buf_size * sizeof(struct sk_buff *));
1211
1212 if (local->ops->ampdu_action)
1213 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1214 sta->addr, tid, &start_seq_num);
1215 #ifdef CONFIG_MAC80211_HT_DEBUG
1216 printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
1217 #endif /* CONFIG_MAC80211_HT_DEBUG */
1218
1219 if (ret) {
1220 kfree(tid_agg_rx->reorder_buf);
1221 kfree(tid_agg_rx);
1222 sta->ampdu_mlme.tid_rx[tid] = NULL;
1223 goto end;
1224 }
1225
1226 /* change state and send addba resp */
1227 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
1228 tid_agg_rx->dialog_token = dialog_token;
1229 tid_agg_rx->ssn = start_seq_num;
1230 tid_agg_rx->head_seq_num = start_seq_num;
1231 tid_agg_rx->buf_size = buf_size;
1232 tid_agg_rx->timeout = timeout;
1233 tid_agg_rx->stored_mpdu_num = 0;
1234 status = WLAN_STATUS_SUCCESS;
1235 end:
1236 spin_unlock_bh(&sta->lock);
1237
1238 end_no_lock:
1239 ieee80211_send_addba_resp(sta->sdata, sta->addr, tid,
1240 dialog_token, status, 1, buf_size, timeout);
1241 rcu_read_unlock();
1242 }
1243
1244 static void ieee80211_sta_process_addba_resp(struct ieee80211_local *local,
1245 struct ieee80211_mgmt *mgmt,
1246 size_t len)
1247 {
1248 struct ieee80211_hw *hw = &local->hw;
1249 struct sta_info *sta;
1250 u16 capab;
1251 u16 tid;
1252 u8 *state;
1253
1254 rcu_read_lock();
1255
1256 sta = sta_info_get(local, mgmt->sa);
1257 if (!sta) {
1258 rcu_read_unlock();
1259 return;
1260 }
1261
1262 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1263 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1264
1265 state = &sta->ampdu_mlme.tid_state_tx[tid];
1266
1267 spin_lock_bh(&sta->lock);
1268
1269 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1270 spin_unlock_bh(&sta->lock);
1271 goto addba_resp_exit;
1272 }
1273
1274 if (mgmt->u.action.u.addba_resp.dialog_token !=
1275 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
1276 spin_unlock_bh(&sta->lock);
1277 #ifdef CONFIG_MAC80211_HT_DEBUG
1278 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1279 #endif /* CONFIG_MAC80211_HT_DEBUG */
1280 goto addba_resp_exit;
1281 }
1282
1283 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
1284 #ifdef CONFIG_MAC80211_HT_DEBUG
1285 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1286 #endif /* CONFIG_MAC80211_HT_DEBUG */
1287 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1288 == WLAN_STATUS_SUCCESS) {
1289 *state |= HT_ADDBA_RECEIVED_MSK;
1290 sta->ampdu_mlme.addba_req_num[tid] = 0;
1291
1292 if (*state == HT_AGG_STATE_OPERATIONAL)
1293 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1294
1295 spin_unlock_bh(&sta->lock);
1296 } else {
1297 sta->ampdu_mlme.addba_req_num[tid]++;
1298 /* this will allow the state check in stop_BA_session */
1299 *state = HT_AGG_STATE_OPERATIONAL;
1300 spin_unlock_bh(&sta->lock);
1301 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1302 WLAN_BACK_INITIATOR);
1303 }
1304
1305 addba_resp_exit:
1306 rcu_read_unlock();
1307 }
1308
1309 static void ieee80211_sta_process_delba(struct ieee80211_sub_if_data *sdata,
1310 struct ieee80211_mgmt *mgmt, size_t len)
1311 {
1312 struct ieee80211_local *local = sdata->local;
1313 struct sta_info *sta;
1314 u16 tid, params;
1315 u16 initiator;
1316 DECLARE_MAC_BUF(mac);
1317
1318 rcu_read_lock();
1319
1320 sta = sta_info_get(local, mgmt->sa);
1321 if (!sta) {
1322 rcu_read_unlock();
1323 return;
1324 }
1325
1326 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1327 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1328 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1329
1330 #ifdef CONFIG_MAC80211_HT_DEBUG
1331 if (net_ratelimit())
1332 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1333 print_mac(mac, mgmt->sa),
1334 initiator ? "initiator" : "recipient", tid,
1335 mgmt->u.action.u.delba.reason_code);
1336 #endif /* CONFIG_MAC80211_HT_DEBUG */
1337
1338 if (initiator == WLAN_BACK_INITIATOR)
1339 ieee80211_sta_stop_rx_ba_session(sdata, sta->addr, tid,
1340 WLAN_BACK_INITIATOR, 0);
1341 else { /* WLAN_BACK_RECIPIENT */
1342 spin_lock_bh(&sta->lock);
1343 sta->ampdu_mlme.tid_state_tx[tid] =
1344 HT_AGG_STATE_OPERATIONAL;
1345 spin_unlock_bh(&sta->lock);
1346 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1347 WLAN_BACK_RECIPIENT);
1348 }
1349 rcu_read_unlock();
1350 }
1351
1352 static void ieee80211_sta_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1353 struct ieee80211_mgmt *mgmt,
1354 size_t len)
1355 {
1356 /*
1357 * Ignoring measurement request is spec violation.
1358 * Mandatory measurements must be reported optional
1359 * measurements might be refused or reported incapable
1360 * For now just refuse
1361 * TODO: Answer basic measurement as unmeasured
1362 */
1363 ieee80211_send_refuse_measurement_request(sdata,
1364 &mgmt->u.action.u.measurement.msr_elem,
1365 mgmt->sa, mgmt->bssid,
1366 mgmt->u.action.u.measurement.dialog_token);
1367 }
1368
1369
1370 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1371 struct ieee80211_if_sta *ifsta,
1372 struct ieee80211_mgmt *mgmt,
1373 size_t len)
1374 {
1375 u16 auth_alg, auth_transaction, status_code;
1376 DECLARE_MAC_BUF(mac);
1377
1378 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
1379 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
1380 return;
1381
1382 if (len < 24 + 6)
1383 return;
1384
1385 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1386 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1387 return;
1388
1389 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1390 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1391 return;
1392
1393 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1394 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1395 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1396
1397 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1398 /*
1399 * IEEE 802.11 standard does not require authentication in IBSS
1400 * networks and most implementations do not seem to use it.
1401 * However, try to reply to authentication attempts if someone
1402 * has actually implemented this.
1403 */
1404 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
1405 return;
1406 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
1407 }
1408
1409 if (auth_alg != ifsta->auth_alg ||
1410 auth_transaction != ifsta->auth_transaction)
1411 return;
1412
1413 if (status_code != WLAN_STATUS_SUCCESS) {
1414 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1415 u8 algs[3];
1416 const int num_algs = ARRAY_SIZE(algs);
1417 int i, pos;
1418 algs[0] = algs[1] = algs[2] = 0xff;
1419 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1420 algs[0] = WLAN_AUTH_OPEN;
1421 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1422 algs[1] = WLAN_AUTH_SHARED_KEY;
1423 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1424 algs[2] = WLAN_AUTH_LEAP;
1425 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1426 pos = 0;
1427 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1428 pos = 1;
1429 else
1430 pos = 2;
1431 for (i = 0; i < num_algs; i++) {
1432 pos++;
1433 if (pos >= num_algs)
1434 pos = 0;
1435 if (algs[pos] == ifsta->auth_alg ||
1436 algs[pos] == 0xff)
1437 continue;
1438 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1439 !ieee80211_sta_wep_configured(sdata))
1440 continue;
1441 ifsta->auth_alg = algs[pos];
1442 break;
1443 }
1444 }
1445 return;
1446 }
1447
1448 switch (ifsta->auth_alg) {
1449 case WLAN_AUTH_OPEN:
1450 case WLAN_AUTH_LEAP:
1451 ieee80211_auth_completed(sdata, ifsta);
1452 break;
1453 case WLAN_AUTH_SHARED_KEY:
1454 if (ifsta->auth_transaction == 4)
1455 ieee80211_auth_completed(sdata, ifsta);
1456 else
1457 ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
1458 break;
1459 }
1460 }
1461
1462
1463 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1464 struct ieee80211_if_sta *ifsta,
1465 struct ieee80211_mgmt *mgmt,
1466 size_t len)
1467 {
1468 u16 reason_code;
1469 DECLARE_MAC_BUF(mac);
1470
1471 if (len < 24 + 2)
1472 return;
1473
1474 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1475 return;
1476
1477 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1478
1479 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
1480 printk(KERN_DEBUG "%s: deauthenticated\n", sdata->dev->name);
1481
1482 if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1483 ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
1484 ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1485 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1486 mod_timer(&ifsta->timer, jiffies +
1487 IEEE80211_RETRY_AUTH_INTERVAL);
1488 }
1489
1490 ieee80211_set_disassoc(sdata, ifsta, true, false, 0);
1491 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1492 }
1493
1494
1495 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1496 struct ieee80211_if_sta *ifsta,
1497 struct ieee80211_mgmt *mgmt,
1498 size_t len)
1499 {
1500 u16 reason_code;
1501 DECLARE_MAC_BUF(mac);
1502
1503 if (len < 24 + 2)
1504 return;
1505
1506 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1507 return;
1508
1509 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1510
1511 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1512 printk(KERN_DEBUG "%s: disassociated\n", sdata->dev->name);
1513
1514 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1515 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
1516 mod_timer(&ifsta->timer, jiffies +
1517 IEEE80211_RETRY_AUTH_INTERVAL);
1518 }
1519
1520 ieee80211_set_disassoc(sdata, ifsta, false, false, 0);
1521 }
1522
1523
1524 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1525 struct ieee80211_if_sta *ifsta,
1526 struct ieee80211_mgmt *mgmt,
1527 size_t len,
1528 int reassoc)
1529 {
1530 struct ieee80211_local *local = sdata->local;
1531 struct ieee80211_supported_band *sband;
1532 struct sta_info *sta;
1533 u64 rates, basic_rates;
1534 u16 capab_info, status_code, aid;
1535 struct ieee802_11_elems elems;
1536 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1537 u8 *pos;
1538 int i, j;
1539 DECLARE_MAC_BUF(mac);
1540 bool have_higher_than_11mbit = false;
1541
1542 /* AssocResp and ReassocResp have identical structure, so process both
1543 * of them in this function. */
1544
1545 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
1546 return;
1547
1548 if (len < 24 + 6)
1549 return;
1550
1551 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1552 return;
1553
1554 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1555 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1556 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1557
1558 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1559 "status=%d aid=%d)\n",
1560 sdata->dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1561 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1562
1563 if (status_code != WLAN_STATUS_SUCCESS) {
1564 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1565 sdata->dev->name, status_code);
1566 /* if this was a reassociation, ensure we try a "full"
1567 * association next time. This works around some broken APs
1568 * which do not correctly reject reassociation requests. */
1569 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1570 return;
1571 }
1572
1573 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1574 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1575 "set\n", sdata->dev->name, aid);
1576 aid &= ~(BIT(15) | BIT(14));
1577
1578 pos = mgmt->u.assoc_resp.variable;
1579 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1580
1581 if (!elems.supp_rates) {
1582 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1583 sdata->dev->name);
1584 return;
1585 }
1586
1587 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1588 ifsta->aid = aid;
1589 ifsta->ap_capab = capab_info;
1590
1591 kfree(ifsta->assocresp_ies);
1592 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1593 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1594 if (ifsta->assocresp_ies)
1595 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1596
1597 rcu_read_lock();
1598
1599 /* Add STA entry for the AP */
1600 sta = sta_info_get(local, ifsta->bssid);
1601 if (!sta) {
1602 struct ieee80211_sta_bss *bss;
1603 int err;
1604
1605 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1606 if (!sta) {
1607 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1608 " the AP\n", sdata->dev->name);
1609 rcu_read_unlock();
1610 return;
1611 }
1612 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
1613 local->hw.conf.channel->center_freq,
1614 ifsta->ssid, ifsta->ssid_len);
1615 if (bss) {
1616 sta->last_signal = bss->signal;
1617 sta->last_qual = bss->qual;
1618 sta->last_noise = bss->noise;
1619 ieee80211_rx_bss_put(local, bss);
1620 }
1621
1622 err = sta_info_insert(sta);
1623 if (err) {
1624 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1625 " the AP (error %d)\n", sdata->dev->name, err);
1626 rcu_read_unlock();
1627 return;
1628 }
1629 /* update new sta with its last rx activity */
1630 sta->last_rx = jiffies;
1631 }
1632
1633 /*
1634 * FIXME: Do we really need to update the sta_info's information here?
1635 * We already know about the AP (we found it in our list) so it
1636 * should already be filled with the right info, no?
1637 * As is stands, all this is racy because typically we assume
1638 * the information that is filled in here (except flags) doesn't
1639 * change while a STA structure is alive. As such, it should move
1640 * to between the sta_info_alloc() and sta_info_insert() above.
1641 */
1642
1643 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1644 WLAN_STA_AUTHORIZED);
1645
1646 rates = 0;
1647 basic_rates = 0;
1648 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1649
1650 for (i = 0; i < elems.supp_rates_len; i++) {
1651 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1652
1653 if (rate > 110)
1654 have_higher_than_11mbit = true;
1655
1656 for (j = 0; j < sband->n_bitrates; j++) {
1657 if (sband->bitrates[j].bitrate == rate)
1658 rates |= BIT(j);
1659 if (elems.supp_rates[i] & 0x80)
1660 basic_rates |= BIT(j);
1661 }
1662 }
1663
1664 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1665 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1666
1667 if (rate > 110)
1668 have_higher_than_11mbit = true;
1669
1670 for (j = 0; j < sband->n_bitrates; j++) {
1671 if (sband->bitrates[j].bitrate == rate)
1672 rates |= BIT(j);
1673 if (elems.ext_supp_rates[i] & 0x80)
1674 basic_rates |= BIT(j);
1675 }
1676 }
1677
1678 sta->supp_rates[local->hw.conf.channel->band] = rates;
1679 sdata->basic_rates = basic_rates;
1680
1681 /* cf. IEEE 802.11 9.2.12 */
1682 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1683 have_higher_than_11mbit)
1684 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1685 else
1686 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1687
1688 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1689 (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
1690 struct ieee80211_ht_bss_info bss_info;
1691 ieee80211_ht_cap_ie_to_ht_info(
1692 (struct ieee80211_ht_cap *)
1693 elems.ht_cap_elem, &sta->ht_info);
1694 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1695 (struct ieee80211_ht_addt_info *)
1696 elems.ht_info_elem, &bss_info);
1697 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
1698 }
1699
1700 rate_control_rate_init(sta, local);
1701
1702 if (elems.wmm_param) {
1703 set_sta_flags(sta, WLAN_STA_WME);
1704 rcu_read_unlock();
1705 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1706 elems.wmm_param_len);
1707 } else
1708 rcu_read_unlock();
1709
1710 /* set AID and assoc capability,
1711 * ieee80211_set_associated() will tell the driver */
1712 bss_conf->aid = aid;
1713 bss_conf->assoc_capability = capab_info;
1714 ieee80211_set_associated(sdata, ifsta);
1715
1716 ieee80211_associated(sdata, ifsta);
1717 }
1718
1719
1720 static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
1721 struct ieee80211_if_sta *ifsta,
1722 struct ieee80211_sta_bss *bss)
1723 {
1724 struct ieee80211_local *local = sdata->local;
1725 int res, rates, i, j;
1726 struct sk_buff *skb;
1727 struct ieee80211_mgmt *mgmt;
1728 u8 *pos;
1729 struct ieee80211_supported_band *sband;
1730 union iwreq_data wrqu;
1731
1732 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1733
1734 /* Remove possible STA entries from other IBSS networks. */
1735 sta_info_flush_delayed(sdata);
1736
1737 if (local->ops->reset_tsf) {
1738 /* Reset own TSF to allow time synchronization work. */
1739 local->ops->reset_tsf(local_to_hw(local));
1740 }
1741 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
1742 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
1743 if (res)
1744 return res;
1745
1746 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
1747
1748 sdata->drop_unencrypted = bss->capability &
1749 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
1750
1751 res = ieee80211_set_freq(sdata, bss->freq);
1752
1753 if (res)
1754 return res;
1755
1756 /* Build IBSS probe response */
1757 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
1758 if (skb) {
1759 skb_reserve(skb, local->hw.extra_tx_headroom);
1760
1761 mgmt = (struct ieee80211_mgmt *)
1762 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
1763 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
1764 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1765 IEEE80211_STYPE_PROBE_RESP);
1766 memset(mgmt->da, 0xff, ETH_ALEN);
1767 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1768 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1769 mgmt->u.beacon.beacon_int =
1770 cpu_to_le16(local->hw.conf.beacon_int);
1771 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
1772 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
1773
1774 pos = skb_put(skb, 2 + ifsta->ssid_len);
1775 *pos++ = WLAN_EID_SSID;
1776 *pos++ = ifsta->ssid_len;
1777 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
1778
1779 rates = bss->supp_rates_len;
1780 if (rates > 8)
1781 rates = 8;
1782 pos = skb_put(skb, 2 + rates);
1783 *pos++ = WLAN_EID_SUPP_RATES;
1784 *pos++ = rates;
1785 memcpy(pos, bss->supp_rates, rates);
1786
1787 if (bss->band == IEEE80211_BAND_2GHZ) {
1788 pos = skb_put(skb, 2 + 1);
1789 *pos++ = WLAN_EID_DS_PARAMS;
1790 *pos++ = 1;
1791 *pos++ = ieee80211_frequency_to_channel(bss->freq);
1792 }
1793
1794 pos = skb_put(skb, 2 + 2);
1795 *pos++ = WLAN_EID_IBSS_PARAMS;
1796 *pos++ = 2;
1797 /* FIX: set ATIM window based on scan results */
1798 *pos++ = 0;
1799 *pos++ = 0;
1800
1801 if (bss->supp_rates_len > 8) {
1802 rates = bss->supp_rates_len - 8;
1803 pos = skb_put(skb, 2 + rates);
1804 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1805 *pos++ = rates;
1806 memcpy(pos, &bss->supp_rates[8], rates);
1807 }
1808
1809 ifsta->probe_resp = skb;
1810
1811 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
1812 }
1813
1814 rates = 0;
1815 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1816 for (i = 0; i < bss->supp_rates_len; i++) {
1817 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
1818 for (j = 0; j < sband->n_bitrates; j++)
1819 if (sband->bitrates[j].bitrate == bitrate)
1820 rates |= BIT(j);
1821 }
1822 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
1823
1824 ieee80211_sta_def_wmm_params(sdata, bss);
1825
1826 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
1827 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1828
1829 memset(&wrqu, 0, sizeof(wrqu));
1830 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
1831 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
1832
1833 return res;
1834 }
1835
1836 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
1837 struct ieee802_11_elems *elems,
1838 enum ieee80211_band band)
1839 {
1840 struct ieee80211_supported_band *sband;
1841 struct ieee80211_rate *bitrates;
1842 size_t num_rates;
1843 u64 supp_rates;
1844 int i, j;
1845 sband = local->hw.wiphy->bands[band];
1846
1847 if (!sband) {
1848 WARN_ON(1);
1849 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1850 }
1851
1852 bitrates = sband->bitrates;
1853 num_rates = sband->n_bitrates;
1854 supp_rates = 0;
1855 for (i = 0; i < elems->supp_rates_len +
1856 elems->ext_supp_rates_len; i++) {
1857 u8 rate = 0;
1858 int own_rate;
1859 if (i < elems->supp_rates_len)
1860 rate = elems->supp_rates[i];
1861 else if (elems->ext_supp_rates)
1862 rate = elems->ext_supp_rates
1863 [i - elems->supp_rates_len];
1864 own_rate = 5 * (rate & 0x7f);
1865 for (j = 0; j < num_rates; j++)
1866 if (bitrates[j].bitrate == own_rate)
1867 supp_rates |= BIT(j);
1868 }
1869 return supp_rates;
1870 }
1871
1872 static u64 ieee80211_sta_get_mandatory_rates(struct ieee80211_local *local,
1873 enum ieee80211_band band)
1874 {
1875 struct ieee80211_supported_band *sband;
1876 struct ieee80211_rate *bitrates;
1877 u64 mandatory_rates;
1878 enum ieee80211_rate_flags mandatory_flag;
1879 int i;
1880
1881 sband = local->hw.wiphy->bands[band];
1882 if (!sband) {
1883 WARN_ON(1);
1884 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1885 }
1886
1887 if (band == IEEE80211_BAND_2GHZ)
1888 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
1889 else
1890 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
1891
1892 bitrates = sband->bitrates;
1893 mandatory_rates = 0;
1894 for (i = 0; i < sband->n_bitrates; i++)
1895 if (bitrates[i].flags & mandatory_flag)
1896 mandatory_rates |= BIT(i);
1897 return mandatory_rates;
1898 }
1899
1900 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1901 struct ieee80211_mgmt *mgmt,
1902 size_t len,
1903 struct ieee80211_rx_status *rx_status,
1904 struct ieee802_11_elems *elems,
1905 bool beacon)
1906 {
1907 struct ieee80211_local *local = sdata->local;
1908 int freq;
1909 struct ieee80211_sta_bss *bss;
1910 struct sta_info *sta;
1911 struct ieee80211_channel *channel;
1912 u64 beacon_timestamp, rx_timestamp;
1913 u64 supp_rates = 0;
1914 enum ieee80211_band band = rx_status->band;
1915 DECLARE_MAC_BUF(mac);
1916 DECLARE_MAC_BUF(mac2);
1917
1918 if (elems->ds_params && elems->ds_params_len == 1)
1919 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1920 else
1921 freq = rx_status->freq;
1922
1923 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1924
1925 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1926 return;
1927
1928 if (ieee80211_vif_is_mesh(&sdata->vif) && elems->mesh_id &&
1929 elems->mesh_config && mesh_matches_local(elems, sdata)) {
1930 supp_rates = ieee80211_sta_get_rates(local, elems, band);
1931
1932 mesh_neighbour_update(mgmt->sa, supp_rates, sdata,
1933 mesh_peer_accepts_plinks(elems));
1934 }
1935
1936 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems->supp_rates &&
1937 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1938 supp_rates = ieee80211_sta_get_rates(local, elems, band);
1939
1940 rcu_read_lock();
1941
1942 sta = sta_info_get(local, mgmt->sa);
1943 if (sta) {
1944 u64 prev_rates;
1945
1946 prev_rates = sta->supp_rates[band];
1947 /* make sure mandatory rates are always added */
1948 sta->supp_rates[band] = supp_rates |
1949 ieee80211_sta_get_mandatory_rates(local, band);
1950
1951 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1952 if (sta->supp_rates[band] != prev_rates)
1953 printk(KERN_DEBUG "%s: updated supp_rates set "
1954 "for %s based on beacon info (0x%llx | "
1955 "0x%llx -> 0x%llx)\n",
1956 sdata->dev->name, print_mac(mac, sta->addr),
1957 (unsigned long long) prev_rates,
1958 (unsigned long long) supp_rates,
1959 (unsigned long long) sta->supp_rates[band]);
1960 #endif
1961 } else {
1962 ieee80211_ibss_add_sta(sdata, NULL, mgmt->bssid,
1963 mgmt->sa, supp_rates);
1964 }
1965
1966 rcu_read_unlock();
1967 }
1968
1969 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1970 freq, beacon);
1971 if (!bss)
1972 return;
1973
1974 /* was just updated in ieee80211_bss_info_update */
1975 beacon_timestamp = bss->timestamp;
1976
1977 /*
1978 * In STA mode, the remaining parameters should not be overridden
1979 * by beacons because they're not necessarily accurate there.
1980 */
1981 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1982 bss->last_probe_resp && beacon) {
1983 ieee80211_rx_bss_put(local, bss);
1984 return;
1985 }
1986
1987 /* check if we need to merge IBSS */
1988 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
1989 bss->capability & WLAN_CAPABILITY_IBSS &&
1990 bss->freq == local->oper_channel->center_freq &&
1991 elems->ssid_len == sdata->u.sta.ssid_len &&
1992 memcmp(elems->ssid, sdata->u.sta.ssid,
1993 sdata->u.sta.ssid_len) == 0) {
1994 if (rx_status->flag & RX_FLAG_TSFT) {
1995 /* in order for correct IBSS merging we need mactime
1996 *
1997 * since mactime is defined as the time the first data
1998 * symbol of the frame hits the PHY, and the timestamp
1999 * of the beacon is defined as "the time that the data
2000 * symbol containing the first bit of the timestamp is
2001 * transmitted to the PHY plus the transmitting STA’s
2002 * delays through its local PHY from the MAC-PHY
2003 * interface to its interface with the WM"
2004 * (802.11 11.1.2) - equals the time this bit arrives at
2005 * the receiver - we have to take into account the
2006 * offset between the two.
2007 * e.g: at 1 MBit that means mactime is 192 usec earlier
2008 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2009 */
2010 int rate = local->hw.wiphy->bands[band]->
2011 bitrates[rx_status->rate_idx].bitrate;
2012 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2013 } else if (local && local->ops && local->ops->get_tsf)
2014 /* second best option: get current TSF */
2015 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2016 else
2017 /* can't merge without knowing the TSF */
2018 rx_timestamp = -1LLU;
2019 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2020 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2021 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2022 print_mac(mac, mgmt->sa),
2023 print_mac(mac2, mgmt->bssid),
2024 (unsigned long long)rx_timestamp,
2025 (unsigned long long)beacon_timestamp,
2026 (unsigned long long)(rx_timestamp - beacon_timestamp),
2027 jiffies);
2028 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2029 if (beacon_timestamp > rx_timestamp) {
2030 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2031 printk(KERN_DEBUG "%s: beacon TSF higher than "
2032 "local TSF - IBSS merge with BSSID %s\n",
2033 sdata->dev->name, print_mac(mac, mgmt->bssid));
2034 #endif
2035 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
2036 ieee80211_ibss_add_sta(sdata, NULL,
2037 mgmt->bssid, mgmt->sa,
2038 supp_rates);
2039 }
2040 }
2041
2042 ieee80211_rx_bss_put(local, bss);
2043 }
2044
2045
2046 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2047 struct ieee80211_mgmt *mgmt,
2048 size_t len,
2049 struct ieee80211_rx_status *rx_status)
2050 {
2051 size_t baselen;
2052 struct ieee802_11_elems elems;
2053 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2054
2055 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
2056 return; /* ignore ProbeResp to foreign address */
2057
2058 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2059 if (baselen > len)
2060 return;
2061
2062 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2063 &elems);
2064
2065 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
2066
2067 /* direct probe may be part of the association flow */
2068 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
2069 &ifsta->request)) {
2070 printk(KERN_DEBUG "%s direct probe responded\n",
2071 sdata->dev->name);
2072 ieee80211_authenticate(sdata, ifsta);
2073 }
2074 }
2075
2076
2077 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2078 struct ieee80211_mgmt *mgmt,
2079 size_t len,
2080 struct ieee80211_rx_status *rx_status)
2081 {
2082 struct ieee80211_if_sta *ifsta;
2083 size_t baselen;
2084 struct ieee802_11_elems elems;
2085 struct ieee80211_local *local = sdata->local;
2086 struct ieee80211_conf *conf = &local->hw.conf;
2087 u32 changed = 0;
2088
2089 /* Process beacon from the current BSS */
2090 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2091 if (baselen > len)
2092 return;
2093
2094 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2095
2096 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
2097
2098 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2099 return;
2100 ifsta = &sdata->u.sta;
2101
2102 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2103 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2104 return;
2105
2106 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
2107 elems.wmm_param_len);
2108
2109 if (elems.erp_info && elems.erp_info_len >= 1)
2110 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2111 else {
2112 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
2113 changed |= ieee80211_handle_protect_preamb(sdata, false,
2114 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
2115 }
2116
2117 if (elems.ht_cap_elem && elems.ht_info_elem &&
2118 elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2119 struct ieee80211_ht_bss_info bss_info;
2120
2121 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2122 (struct ieee80211_ht_addt_info *)
2123 elems.ht_info_elem, &bss_info);
2124 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2125 &bss_info);
2126 }
2127
2128 ieee80211_bss_info_change_notify(sdata, changed);
2129 }
2130
2131
2132 static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
2133 struct ieee80211_if_sta *ifsta,
2134 struct ieee80211_mgmt *mgmt,
2135 size_t len,
2136 struct ieee80211_rx_status *rx_status)
2137 {
2138 struct ieee80211_local *local = sdata->local;
2139 int tx_last_beacon;
2140 struct sk_buff *skb;
2141 struct ieee80211_mgmt *resp;
2142 u8 *pos, *end;
2143 DECLARE_MAC_BUF(mac);
2144 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2145 DECLARE_MAC_BUF(mac2);
2146 DECLARE_MAC_BUF(mac3);
2147 #endif
2148
2149 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2150 ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
2151 len < 24 + 2 || !ifsta->probe_resp)
2152 return;
2153
2154 if (local->ops->tx_last_beacon)
2155 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2156 else
2157 tx_last_beacon = 1;
2158
2159 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2160 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2161 "%s (tx_last_beacon=%d)\n",
2162 sdata->dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2163 print_mac(mac3, mgmt->bssid), tx_last_beacon);
2164 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2165
2166 if (!tx_last_beacon)
2167 return;
2168
2169 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2170 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2171 return;
2172
2173 end = ((u8 *) mgmt) + len;
2174 pos = mgmt->u.probe_req.variable;
2175 if (pos[0] != WLAN_EID_SSID ||
2176 pos + 2 + pos[1] > end) {
2177 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2178 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2179 "from %s\n",
2180 sdata->dev->name, print_mac(mac, mgmt->sa));
2181 #endif
2182 return;
2183 }
2184 if (pos[1] != 0 &&
2185 (pos[1] != ifsta->ssid_len ||
2186 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2187 /* Ignore ProbeReq for foreign SSID */
2188 return;
2189 }
2190
2191 /* Reply with ProbeResp */
2192 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
2193 if (!skb)
2194 return;
2195
2196 resp = (struct ieee80211_mgmt *) skb->data;
2197 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2198 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2199 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2200 sdata->dev->name, print_mac(mac, resp->da));
2201 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2202 ieee80211_sta_tx(sdata, skb, 0);
2203 }
2204
2205 static void ieee80211_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
2206 struct ieee80211_if_sta *ifsta,
2207 struct ieee80211_mgmt *mgmt,
2208 size_t len,
2209 struct ieee80211_rx_status *rx_status)
2210 {
2211 struct ieee80211_local *local = sdata->local;
2212
2213 /* all categories we currently handle have action_code */
2214 if (len < IEEE80211_MIN_ACTION_SIZE + 1)
2215 return;
2216
2217 switch (mgmt->u.action.category) {
2218 case WLAN_CATEGORY_SPECTRUM_MGMT:
2219 if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ)
2220 break;
2221 switch (mgmt->u.action.u.measurement.action_code) {
2222 case WLAN_ACTION_SPCT_MSR_REQ:
2223 if (len < (IEEE80211_MIN_ACTION_SIZE +
2224 sizeof(mgmt->u.action.u.measurement)))
2225 break;
2226 ieee80211_sta_process_measurement_req(sdata, mgmt, len);
2227 break;
2228 }
2229 break;
2230 case WLAN_CATEGORY_BACK:
2231 switch (mgmt->u.action.u.addba_req.action_code) {
2232 case WLAN_ACTION_ADDBA_REQ:
2233 if (len < (IEEE80211_MIN_ACTION_SIZE +
2234 sizeof(mgmt->u.action.u.addba_req)))
2235 break;
2236 ieee80211_sta_process_addba_request(local, mgmt, len);
2237 break;
2238 case WLAN_ACTION_ADDBA_RESP:
2239 if (len < (IEEE80211_MIN_ACTION_SIZE +
2240 sizeof(mgmt->u.action.u.addba_resp)))
2241 break;
2242 ieee80211_sta_process_addba_resp(local, mgmt, len);
2243 break;
2244 case WLAN_ACTION_DELBA:
2245 if (len < (IEEE80211_MIN_ACTION_SIZE +
2246 sizeof(mgmt->u.action.u.delba)))
2247 break;
2248 ieee80211_sta_process_delba(sdata, mgmt, len);
2249 break;
2250 }
2251 break;
2252 case PLINK_CATEGORY:
2253 if (ieee80211_vif_is_mesh(&sdata->vif))
2254 mesh_rx_plink_frame(sdata, mgmt, len, rx_status);
2255 break;
2256 case MESH_PATH_SEL_CATEGORY:
2257 if (ieee80211_vif_is_mesh(&sdata->vif))
2258 mesh_rx_path_sel_frame(sdata, mgmt, len);
2259 break;
2260 }
2261 }
2262
2263 void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
2264 struct ieee80211_rx_status *rx_status)
2265 {
2266 struct ieee80211_local *local = sdata->local;
2267 struct ieee80211_if_sta *ifsta;
2268 struct ieee80211_mgmt *mgmt;
2269 u16 fc;
2270
2271 if (skb->len < 24)
2272 goto fail;
2273
2274 ifsta = &sdata->u.sta;
2275
2276 mgmt = (struct ieee80211_mgmt *) skb->data;
2277 fc = le16_to_cpu(mgmt->frame_control);
2278
2279 switch (fc & IEEE80211_FCTL_STYPE) {
2280 case IEEE80211_STYPE_PROBE_REQ:
2281 case IEEE80211_STYPE_PROBE_RESP:
2282 case IEEE80211_STYPE_BEACON:
2283 case IEEE80211_STYPE_ACTION:
2284 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2285 case IEEE80211_STYPE_AUTH:
2286 case IEEE80211_STYPE_ASSOC_RESP:
2287 case IEEE80211_STYPE_REASSOC_RESP:
2288 case IEEE80211_STYPE_DEAUTH:
2289 case IEEE80211_STYPE_DISASSOC:
2290 skb_queue_tail(&ifsta->skb_queue, skb);
2291 queue_work(local->hw.workqueue, &ifsta->work);
2292 return;
2293 }
2294
2295 fail:
2296 kfree_skb(skb);
2297 }
2298
2299 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2300 struct sk_buff *skb)
2301 {
2302 struct ieee80211_rx_status *rx_status;
2303 struct ieee80211_if_sta *ifsta;
2304 struct ieee80211_mgmt *mgmt;
2305 u16 fc;
2306
2307 ifsta = &sdata->u.sta;
2308
2309 rx_status = (struct ieee80211_rx_status *) skb->cb;
2310 mgmt = (struct ieee80211_mgmt *) skb->data;
2311 fc = le16_to_cpu(mgmt->frame_control);
2312
2313 switch (fc & IEEE80211_FCTL_STYPE) {
2314 case IEEE80211_STYPE_PROBE_REQ:
2315 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len,
2316 rx_status);
2317 break;
2318 case IEEE80211_STYPE_PROBE_RESP:
2319 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
2320 break;
2321 case IEEE80211_STYPE_BEACON:
2322 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2323 break;
2324 case IEEE80211_STYPE_AUTH:
2325 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
2326 break;
2327 case IEEE80211_STYPE_ASSOC_RESP:
2328 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
2329 break;
2330 case IEEE80211_STYPE_REASSOC_RESP:
2331 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
2332 break;
2333 case IEEE80211_STYPE_DEAUTH:
2334 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
2335 break;
2336 case IEEE80211_STYPE_DISASSOC:
2337 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
2338 break;
2339 case IEEE80211_STYPE_ACTION:
2340 ieee80211_rx_mgmt_action(sdata, ifsta, mgmt, skb->len, rx_status);
2341 break;
2342 }
2343
2344 kfree_skb(skb);
2345 }
2346
2347
2348 static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
2349 {
2350 struct ieee80211_local *local = sdata->local;
2351 int active = 0;
2352 struct sta_info *sta;
2353
2354 rcu_read_lock();
2355
2356 list_for_each_entry_rcu(sta, &local->sta_list, list) {
2357 if (sta->sdata == sdata &&
2358 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2359 jiffies)) {
2360 active++;
2361 break;
2362 }
2363 }
2364
2365 rcu_read_unlock();
2366
2367 return active;
2368 }
2369
2370
2371 static void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, unsigned long exp_time)
2372 {
2373 struct ieee80211_local *local = sdata->local;
2374 struct sta_info *sta, *tmp;
2375 LIST_HEAD(tmp_list);
2376 DECLARE_MAC_BUF(mac);
2377 unsigned long flags;
2378
2379 spin_lock_irqsave(&local->sta_lock, flags);
2380 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
2381 if (time_after(jiffies, sta->last_rx + exp_time)) {
2382 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2383 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
2384 sdata->dev->name, print_mac(mac, sta->addr));
2385 #endif
2386 __sta_info_unlink(&sta);
2387 if (sta)
2388 list_add(&sta->list, &tmp_list);
2389 }
2390 spin_unlock_irqrestore(&local->sta_lock, flags);
2391
2392 list_for_each_entry_safe(sta, tmp, &tmp_list, list)
2393 sta_info_destroy(sta);
2394 }
2395
2396
2397 static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
2398 struct ieee80211_if_sta *ifsta)
2399 {
2400 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2401
2402 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
2403 if (ieee80211_sta_active_ibss(sdata))
2404 return;
2405
2406 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
2407 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
2408 ieee80211_sta_req_scan(sdata, ifsta->ssid, ifsta->ssid_len);
2409 }
2410
2411
2412 #ifdef CONFIG_MAC80211_MESH
2413 static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata,
2414 struct ieee80211_if_sta *ifsta)
2415 {
2416 bool free_plinks;
2417
2418 ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
2419 mesh_path_expire(sdata);
2420
2421 free_plinks = mesh_plink_availables(sdata);
2422 if (free_plinks != sdata->u.sta.accepting_plinks)
2423 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
2424
2425 mod_timer(&ifsta->timer, jiffies +
2426 IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
2427 }
2428
2429
2430 void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
2431 {
2432 struct ieee80211_if_sta *ifsta;
2433 ifsta = &sdata->u.sta;
2434 ifsta->state = IEEE80211_STA_MLME_MESH_UP;
2435 ieee80211_sta_timer((unsigned long)sdata);
2436 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
2437 }
2438 #endif
2439
2440
2441 void ieee80211_sta_timer(unsigned long data)
2442 {
2443 struct ieee80211_sub_if_data *sdata =
2444 (struct ieee80211_sub_if_data *) data;
2445 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2446 struct ieee80211_local *local = sdata->local;
2447
2448 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2449 queue_work(local->hw.workqueue, &ifsta->work);
2450 }
2451
2452 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
2453 struct ieee80211_if_sta *ifsta)
2454 {
2455 struct ieee80211_local *local = sdata->local;
2456
2457 if (local->ops->reset_tsf) {
2458 /* Reset own TSF to allow time synchronization work. */
2459 local->ops->reset_tsf(local_to_hw(local));
2460 }
2461
2462 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2463
2464
2465 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2466 ifsta->auth_alg = WLAN_AUTH_OPEN;
2467 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2468 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2469 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2470 ifsta->auth_alg = WLAN_AUTH_LEAP;
2471 else
2472 ifsta->auth_alg = WLAN_AUTH_OPEN;
2473 ifsta->auth_transaction = -1;
2474 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
2475 ifsta->assoc_scan_tries = 0;
2476 ifsta->direct_probe_tries = 0;
2477 ifsta->auth_tries = 0;
2478 ifsta->assoc_tries = 0;
2479 netif_tx_stop_all_queues(sdata->dev);
2480 netif_carrier_off(sdata->dev);
2481 }
2482
2483
2484 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
2485 struct ieee80211_if_sta *ifsta)
2486 {
2487 struct ieee80211_local *local = sdata->local;
2488
2489 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2490 return;
2491
2492 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2493 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2494 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2495 IEEE80211_STA_AUTO_SSID_SEL))) {
2496
2497 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED)
2498 ieee80211_set_disassoc(sdata, ifsta, true, true,
2499 WLAN_REASON_DEAUTH_LEAVING);
2500
2501 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2502 queue_work(local->hw.workqueue, &ifsta->work);
2503 }
2504 }
2505
2506 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2507 const char *ssid, int ssid_len)
2508 {
2509 int tmp, hidden_ssid;
2510
2511 if (ssid_len == ifsta->ssid_len &&
2512 !memcmp(ifsta->ssid, ssid, ssid_len))
2513 return 1;
2514
2515 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2516 return 0;
2517
2518 hidden_ssid = 1;
2519 tmp = ssid_len;
2520 while (tmp--) {
2521 if (ssid[tmp] != '\0') {
2522 hidden_ssid = 0;
2523 break;
2524 }
2525 }
2526
2527 if (hidden_ssid && ifsta->ssid_len == ssid_len)
2528 return 1;
2529
2530 if (ssid_len == 1 && ssid[0] == ' ')
2531 return 1;
2532
2533 return 0;
2534 }
2535
2536 static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
2537 struct ieee80211_if_sta *ifsta)
2538 {
2539 struct ieee80211_local *local = sdata->local;
2540 struct ieee80211_sta_bss *bss;
2541 struct ieee80211_supported_band *sband;
2542 u8 bssid[ETH_ALEN], *pos;
2543 int i;
2544 int ret;
2545 DECLARE_MAC_BUF(mac);
2546
2547 #if 0
2548 /* Easier testing, use fixed BSSID. */
2549 memset(bssid, 0xfe, ETH_ALEN);
2550 #else
2551 /* Generate random, not broadcast, locally administered BSSID. Mix in
2552 * own MAC address to make sure that devices that do not have proper
2553 * random number generator get different BSSID. */
2554 get_random_bytes(bssid, ETH_ALEN);
2555 for (i = 0; i < ETH_ALEN; i++)
2556 bssid[i] ^= sdata->dev->dev_addr[i];
2557 bssid[0] &= ~0x01;
2558 bssid[0] |= 0x02;
2559 #endif
2560
2561 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
2562 sdata->dev->name, print_mac(mac, bssid));
2563
2564 bss = ieee80211_rx_bss_add(local, bssid,
2565 local->hw.conf.channel->center_freq,
2566 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
2567 if (!bss)
2568 return -ENOMEM;
2569
2570 bss->band = local->hw.conf.channel->band;
2571 sband = local->hw.wiphy->bands[bss->band];
2572
2573 if (local->hw.conf.beacon_int == 0)
2574 local->hw.conf.beacon_int = 100;
2575 bss->beacon_int = local->hw.conf.beacon_int;
2576 bss->last_update = jiffies;
2577 bss->capability = WLAN_CAPABILITY_IBSS;
2578
2579 if (sdata->default_key)
2580 bss->capability |= WLAN_CAPABILITY_PRIVACY;
2581 else
2582 sdata->drop_unencrypted = 0;
2583
2584 bss->supp_rates_len = sband->n_bitrates;
2585 pos = bss->supp_rates;
2586 for (i = 0; i < sband->n_bitrates; i++) {
2587 int rate = sband->bitrates[i].bitrate;
2588 *pos++ = (u8) (rate / 5);
2589 }
2590
2591 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
2592 ieee80211_rx_bss_put(local, bss);
2593 return ret;
2594 }
2595
2596
2597 static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
2598 struct ieee80211_if_sta *ifsta)
2599 {
2600 struct ieee80211_local *local = sdata->local;
2601 struct ieee80211_sta_bss *bss;
2602 int found = 0;
2603 u8 bssid[ETH_ALEN];
2604 int active_ibss;
2605 DECLARE_MAC_BUF(mac);
2606 DECLARE_MAC_BUF(mac2);
2607
2608 if (ifsta->ssid_len == 0)
2609 return -EINVAL;
2610
2611 active_ibss = ieee80211_sta_active_ibss(sdata);
2612 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2613 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2614 sdata->dev->name, active_ibss);
2615 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2616 spin_lock_bh(&local->sta_bss_lock);
2617 list_for_each_entry(bss, &local->sta_bss_list, list) {
2618 if (ifsta->ssid_len != bss->ssid_len ||
2619 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2620 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2621 continue;
2622 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2623 printk(KERN_DEBUG " bssid=%s found\n",
2624 print_mac(mac, bss->bssid));
2625 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2626 memcpy(bssid, bss->bssid, ETH_ALEN);
2627 found = 1;
2628 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2629 break;
2630 }
2631 spin_unlock_bh(&local->sta_bss_lock);
2632
2633 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2634 if (found)
2635 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
2636 "%s\n", print_mac(mac, bssid),
2637 print_mac(mac2, ifsta->bssid));
2638 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2639
2640 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2641 int ret;
2642 int search_freq;
2643
2644 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2645 search_freq = bss->freq;
2646 else
2647 search_freq = local->hw.conf.channel->center_freq;
2648
2649 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
2650 ifsta->ssid, ifsta->ssid_len);
2651 if (!bss)
2652 goto dont_join;
2653
2654 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
2655 " based on configured SSID\n",
2656 sdata->dev->name, print_mac(mac, bssid));
2657 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
2658 ieee80211_rx_bss_put(local, bss);
2659 return ret;
2660 }
2661
2662 dont_join:
2663 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2664 printk(KERN_DEBUG " did not try to join ibss\n");
2665 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2666
2667 /* Selected IBSS not found in current scan results - try to scan */
2668 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
2669 !ieee80211_sta_active_ibss(sdata)) {
2670 mod_timer(&ifsta->timer, jiffies +
2671 IEEE80211_IBSS_MERGE_INTERVAL);
2672 } else if (time_after(jiffies, local->last_scan_completed +
2673 IEEE80211_SCAN_INTERVAL)) {
2674 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
2675 "join\n", sdata->dev->name);
2676 return ieee80211_sta_req_scan(sdata, ifsta->ssid,
2677 ifsta->ssid_len);
2678 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
2679 int interval = IEEE80211_SCAN_INTERVAL;
2680
2681 if (time_after(jiffies, ifsta->ibss_join_req +
2682 IEEE80211_IBSS_JOIN_TIMEOUT)) {
2683 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
2684 (!(local->oper_channel->flags &
2685 IEEE80211_CHAN_NO_IBSS)))
2686 return ieee80211_sta_create_ibss(sdata, ifsta);
2687 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
2688 printk(KERN_DEBUG "%s: IBSS not allowed on"
2689 " %d MHz\n", sdata->dev->name,
2690 local->hw.conf.channel->center_freq);
2691 }
2692
2693 /* No IBSS found - decrease scan interval and continue
2694 * scanning. */
2695 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2696 }
2697
2698 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2699 mod_timer(&ifsta->timer, jiffies + interval);
2700 return 0;
2701 }
2702
2703 return 0;
2704 }
2705
2706
2707 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2708 {
2709 struct ieee80211_if_sta *ifsta;
2710 int res;
2711
2712 if (len > IEEE80211_MAX_SSID_LEN)
2713 return -EINVAL;
2714
2715 ifsta = &sdata->u.sta;
2716
2717 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
2718 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
2719 memcpy(ifsta->ssid, ssid, len);
2720 ifsta->ssid_len = len;
2721 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2722
2723 res = 0;
2724 /*
2725 * Hack! MLME code needs to be cleaned up to have different
2726 * entry points for configuration and internal selection change
2727 */
2728 if (netif_running(sdata->dev))
2729 res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID);
2730 if (res) {
2731 printk(KERN_DEBUG "%s: Failed to config new SSID to "
2732 "the low-level driver\n", sdata->dev->name);
2733 return res;
2734 }
2735 }
2736
2737 if (len)
2738 ifsta->flags |= IEEE80211_STA_SSID_SET;
2739 else
2740 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
2741
2742 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
2743 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
2744 ifsta->ibss_join_req = jiffies;
2745 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2746 return ieee80211_sta_find_ibss(sdata, ifsta);
2747 }
2748
2749 return 0;
2750 }
2751
2752
2753 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2754 {
2755 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2756 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2757 *len = ifsta->ssid_len;
2758 return 0;
2759 }
2760
2761
2762 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2763 {
2764 struct ieee80211_if_sta *ifsta;
2765 int res;
2766
2767 ifsta = &sdata->u.sta;
2768
2769 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2770 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2771 res = 0;
2772 /*
2773 * Hack! See also ieee80211_sta_set_ssid.
2774 */
2775 if (netif_running(sdata->dev))
2776 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
2777 if (res) {
2778 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2779 "the low-level driver\n", sdata->dev->name);
2780 return res;
2781 }
2782 }
2783
2784 if (is_valid_ether_addr(bssid))
2785 ifsta->flags |= IEEE80211_STA_BSSID_SET;
2786 else
2787 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
2788
2789 return 0;
2790 }
2791
2792
2793 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
2794 {
2795 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2796
2797 kfree(ifsta->extra_ie);
2798 if (len == 0) {
2799 ifsta->extra_ie = NULL;
2800 ifsta->extra_ie_len = 0;
2801 return 0;
2802 }
2803 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
2804 if (!ifsta->extra_ie) {
2805 ifsta->extra_ie_len = 0;
2806 return -ENOMEM;
2807 }
2808 memcpy(ifsta->extra_ie, ie, len);
2809 ifsta->extra_ie_len = len;
2810 return 0;
2811 }
2812
2813
2814 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
2815 struct sk_buff *skb, u8 *bssid,
2816 u8 *addr, u64 supp_rates)
2817 {
2818 struct ieee80211_local *local = sdata->local;
2819 struct sta_info *sta;
2820 DECLARE_MAC_BUF(mac);
2821 int band = local->hw.conf.channel->band;
2822
2823 /* TODO: Could consider removing the least recently used entry and
2824 * allow new one to be added. */
2825 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
2826 if (net_ratelimit()) {
2827 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
2828 "entry %s\n", sdata->dev->name, print_mac(mac, addr));
2829 }
2830 return NULL;
2831 }
2832
2833 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
2834 return NULL;
2835
2836 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2837 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
2838 wiphy_name(local->hw.wiphy), print_mac(mac, addr), sdata->dev->name);
2839 #endif
2840
2841 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
2842 if (!sta)
2843 return NULL;
2844
2845 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
2846
2847 /* make sure mandatory rates are always added */
2848 sta->supp_rates[band] = supp_rates |
2849 ieee80211_sta_get_mandatory_rates(local, band);
2850
2851 rate_control_rate_init(sta, local);
2852
2853 if (sta_info_insert(sta))
2854 return NULL;
2855
2856 return sta;
2857 }
2858
2859
2860 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
2861 struct ieee80211_if_sta *ifsta)
2862 {
2863 struct ieee80211_local *local = sdata->local;
2864 struct ieee80211_sta_bss *bss, *selected = NULL;
2865 int top_rssi = 0, freq;
2866
2867 spin_lock_bh(&local->sta_bss_lock);
2868 freq = local->oper_channel->center_freq;
2869 list_for_each_entry(bss, &local->sta_bss_list, list) {
2870 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2871 continue;
2872
2873 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2874 IEEE80211_STA_AUTO_BSSID_SEL |
2875 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
2876 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2877 !!sdata->default_key))
2878 continue;
2879
2880 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2881 bss->freq != freq)
2882 continue;
2883
2884 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2885 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2886 continue;
2887
2888 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2889 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2890 continue;
2891
2892 if (!selected || top_rssi < bss->signal) {
2893 selected = bss;
2894 top_rssi = bss->signal;
2895 }
2896 }
2897 if (selected)
2898 atomic_inc(&selected->users);
2899 spin_unlock_bh(&local->sta_bss_lock);
2900
2901 if (selected) {
2902 ieee80211_set_freq(sdata, selected->freq);
2903 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2904 ieee80211_sta_set_ssid(sdata, selected->ssid,
2905 selected->ssid_len);
2906 ieee80211_sta_set_bssid(sdata, selected->bssid);
2907 ieee80211_sta_def_wmm_params(sdata, selected);
2908
2909 /* Send out direct probe if no probe resp was received or
2910 * the one we have is outdated
2911 */
2912 if (!selected->last_probe_resp ||
2913 time_after(jiffies, selected->last_probe_resp
2914 + IEEE80211_SCAN_RESULT_EXPIRE))
2915 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2916 else
2917 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2918
2919 ieee80211_rx_bss_put(local, selected);
2920 ieee80211_sta_reset_auth(sdata, ifsta);
2921 return 0;
2922 } else {
2923 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2924 ifsta->assoc_scan_tries++;
2925 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
2926 ieee80211_sta_start_scan(sdata, NULL, 0);
2927 else
2928 ieee80211_sta_start_scan(sdata, ifsta->ssid,
2929 ifsta->ssid_len);
2930 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2931 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2932 } else
2933 ifsta->state = IEEE80211_STA_MLME_DISABLED;
2934 }
2935 return -1;
2936 }
2937
2938
2939 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2940 {
2941 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2942
2943 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2944 sdata->dev->name, reason);
2945
2946 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
2947 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
2948 return -EINVAL;
2949
2950 ieee80211_set_disassoc(sdata, ifsta, true, true, reason);
2951 return 0;
2952 }
2953
2954
2955 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2956 {
2957 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2958
2959 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2960 sdata->dev->name, reason);
2961
2962 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2963 return -EINVAL;
2964
2965 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
2966 return -1;
2967
2968 ieee80211_set_disassoc(sdata, ifsta, false, true, reason);
2969 return 0;
2970 }
2971
2972 void ieee80211_notify_mac(struct ieee80211_hw *hw,
2973 enum ieee80211_notification_types notif_type)
2974 {
2975 struct ieee80211_local *local = hw_to_local(hw);
2976 struct ieee80211_sub_if_data *sdata;
2977
2978 switch (notif_type) {
2979 case IEEE80211_NOTIFY_RE_ASSOC:
2980 rcu_read_lock();
2981 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
2982 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2983 continue;
2984
2985 ieee80211_sta_req_auth(sdata, &sdata->u.sta);
2986 }
2987 rcu_read_unlock();
2988 break;
2989 }
2990 }
2991 EXPORT_SYMBOL(ieee80211_notify_mac);
2992
2993 void ieee80211_sta_work(struct work_struct *work)
2994 {
2995 struct ieee80211_sub_if_data *sdata =
2996 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2997 struct ieee80211_local *local = sdata->local;
2998 struct ieee80211_if_sta *ifsta;
2999 struct sk_buff *skb;
3000
3001 if (!netif_running(sdata->dev))
3002 return;
3003
3004 if (local->sta_sw_scanning || local->sta_hw_scanning)
3005 return;
3006
3007 if (WARN_ON(sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3008 sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3009 sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT))
3010 return;
3011 ifsta = &sdata->u.sta;
3012
3013 while ((skb = skb_dequeue(&ifsta->skb_queue)))
3014 ieee80211_sta_rx_queued_mgmt(sdata, skb);
3015
3016 #ifdef CONFIG_MAC80211_MESH
3017 if (ifsta->preq_queue_len &&
3018 time_after(jiffies,
3019 ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3020 mesh_path_start_discovery(sdata);
3021 #endif
3022
3023 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
3024 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
3025 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
3026 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3027 ieee80211_sta_start_scan(sdata, ifsta->scan_ssid, ifsta->scan_ssid_len);
3028 return;
3029 }
3030
3031 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3032 if (ieee80211_sta_config_auth(sdata, ifsta))
3033 return;
3034 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3035 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3036 return;
3037
3038 switch (ifsta->state) {
3039 case IEEE80211_STA_MLME_DISABLED:
3040 break;
3041 case IEEE80211_STA_MLME_DIRECT_PROBE:
3042 ieee80211_direct_probe(sdata, ifsta);
3043 break;
3044 case IEEE80211_STA_MLME_AUTHENTICATE:
3045 ieee80211_authenticate(sdata, ifsta);
3046 break;
3047 case IEEE80211_STA_MLME_ASSOCIATE:
3048 ieee80211_associate(sdata, ifsta);
3049 break;
3050 case IEEE80211_STA_MLME_ASSOCIATED:
3051 ieee80211_associated(sdata, ifsta);
3052 break;
3053 case IEEE80211_STA_MLME_IBSS_SEARCH:
3054 ieee80211_sta_find_ibss(sdata, ifsta);
3055 break;
3056 case IEEE80211_STA_MLME_IBSS_JOINED:
3057 ieee80211_sta_merge_ibss(sdata, ifsta);
3058 break;
3059 #ifdef CONFIG_MAC80211_MESH
3060 case IEEE80211_STA_MLME_MESH_UP:
3061 ieee80211_mesh_housekeeping(sdata, ifsta);
3062 break;
3063 #endif
3064 default:
3065 WARN_ON(1);
3066 break;
3067 }
3068
3069 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
3070 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3071 "mixed-cell disabled - disassociate\n", sdata->dev->name);
3072
3073 ieee80211_set_disassoc(sdata, ifsta, false, true,
3074 WLAN_REASON_UNSPECIFIED);
3075 }
3076 }
3077
3078 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3079 {
3080 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
3081 struct ieee80211_if_sta *ifsta;
3082
3083 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3084 ifsta = &sdata->u.sta;
3085 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3086 (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) &&
3087 !ieee80211_sta_active_ibss(sdata)))
3088 ieee80211_sta_find_ibss(sdata, ifsta);
3089 }
3090 }
Linux kernel - Deliverables
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