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mac80211: quiet beacon loss messages
[deliverable/linux.git] / net / mac80211 / mlme.c
1 /*
2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.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/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/rtnetlink.h>
20 #include <net/mac80211.h>
21 #include <asm/unaligned.h>
22
23 #include "ieee80211_i.h"
24 #include "rate.h"
25 #include "led.h"
26
27 #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
28 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
29 #define IEEE80211_AUTH_MAX_TRIES 3
30 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
31 #define IEEE80211_ASSOC_MAX_TRIES 3
32 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
33 #define IEEE80211_PROBE_IDLE_TIME (60 * HZ)
34 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
35
36 /* utils */
37 static int ecw2cw(int ecw)
38 {
39 return (1 << ecw) - 1;
40 }
41
42 static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
43 {
44 u8 *end, *pos;
45
46 pos = bss->cbss.information_elements;
47 if (pos == NULL)
48 return NULL;
49 end = pos + bss->cbss.len_information_elements;
50
51 while (pos + 1 < end) {
52 if (pos + 2 + pos[1] > end)
53 break;
54 if (pos[0] == ie)
55 return pos;
56 pos += 2 + pos[1];
57 }
58
59 return NULL;
60 }
61
62 static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
63 struct ieee80211_supported_band *sband,
64 u32 *rates)
65 {
66 int i, j, count;
67 *rates = 0;
68 count = 0;
69 for (i = 0; i < bss->supp_rates_len; i++) {
70 int rate = (bss->supp_rates[i] & 0x7F) * 5;
71
72 for (j = 0; j < sband->n_bitrates; j++)
73 if (sband->bitrates[j].bitrate == rate) {
74 *rates |= BIT(j);
75 count++;
76 break;
77 }
78 }
79
80 return count;
81 }
82
83 /* frame sending functions */
84
85 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
86 {
87 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
88 struct ieee80211_local *local = sdata->local;
89 struct sk_buff *skb;
90 struct ieee80211_mgmt *mgmt;
91 u8 *pos, *ies, *ht_ie;
92 int i, len, count, rates_len, supp_rates_len;
93 u16 capab;
94 struct ieee80211_bss *bss;
95 int wmm = 0;
96 struct ieee80211_supported_band *sband;
97 u32 rates = 0;
98
99 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
100 sizeof(*mgmt) + 200 + ifmgd->extra_ie_len +
101 ifmgd->ssid_len);
102 if (!skb) {
103 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
104 "frame\n", sdata->dev->name);
105 return;
106 }
107 skb_reserve(skb, local->hw.extra_tx_headroom);
108
109 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
110
111 capab = ifmgd->capab;
112
113 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
114 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
115 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
116 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
117 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
118 }
119
120 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
121 local->hw.conf.channel->center_freq,
122 ifmgd->ssid, ifmgd->ssid_len);
123 if (bss) {
124 if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
125 capab |= WLAN_CAPABILITY_PRIVACY;
126 if (bss->wmm_used)
127 wmm = 1;
128
129 /* get all rates supported by the device and the AP as
130 * some APs don't like getting a superset of their rates
131 * in the association request (e.g. D-Link DAP 1353 in
132 * b-only mode) */
133 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
134
135 if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
136 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
137 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
138
139 ieee80211_rx_bss_put(local, bss);
140 } else {
141 rates = ~0;
142 rates_len = sband->n_bitrates;
143 }
144
145 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
146 memset(mgmt, 0, 24);
147 memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
148 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
149 memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
150
151 if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) {
152 skb_put(skb, 10);
153 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
154 IEEE80211_STYPE_REASSOC_REQ);
155 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
156 mgmt->u.reassoc_req.listen_interval =
157 cpu_to_le16(local->hw.conf.listen_interval);
158 memcpy(mgmt->u.reassoc_req.current_ap, ifmgd->prev_bssid,
159 ETH_ALEN);
160 } else {
161 skb_put(skb, 4);
162 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
163 IEEE80211_STYPE_ASSOC_REQ);
164 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
165 mgmt->u.assoc_req.listen_interval =
166 cpu_to_le16(local->hw.conf.listen_interval);
167 }
168
169 /* SSID */
170 ies = pos = skb_put(skb, 2 + ifmgd->ssid_len);
171 *pos++ = WLAN_EID_SSID;
172 *pos++ = ifmgd->ssid_len;
173 memcpy(pos, ifmgd->ssid, ifmgd->ssid_len);
174
175 /* add all rates which were marked to be used above */
176 supp_rates_len = rates_len;
177 if (supp_rates_len > 8)
178 supp_rates_len = 8;
179
180 len = sband->n_bitrates;
181 pos = skb_put(skb, supp_rates_len + 2);
182 *pos++ = WLAN_EID_SUPP_RATES;
183 *pos++ = supp_rates_len;
184
185 count = 0;
186 for (i = 0; i < sband->n_bitrates; i++) {
187 if (BIT(i) & rates) {
188 int rate = sband->bitrates[i].bitrate;
189 *pos++ = (u8) (rate / 5);
190 if (++count == 8)
191 break;
192 }
193 }
194
195 if (rates_len > count) {
196 pos = skb_put(skb, rates_len - count + 2);
197 *pos++ = WLAN_EID_EXT_SUPP_RATES;
198 *pos++ = rates_len - count;
199
200 for (i++; i < sband->n_bitrates; i++) {
201 if (BIT(i) & rates) {
202 int rate = sband->bitrates[i].bitrate;
203 *pos++ = (u8) (rate / 5);
204 }
205 }
206 }
207
208 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
209 /* 1. power capabilities */
210 pos = skb_put(skb, 4);
211 *pos++ = WLAN_EID_PWR_CAPABILITY;
212 *pos++ = 2;
213 *pos++ = 0; /* min tx power */
214 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
215
216 /* 2. supported channels */
217 /* TODO: get this in reg domain format */
218 pos = skb_put(skb, 2 * sband->n_channels + 2);
219 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
220 *pos++ = 2 * sband->n_channels;
221 for (i = 0; i < sband->n_channels; i++) {
222 *pos++ = ieee80211_frequency_to_channel(
223 sband->channels[i].center_freq);
224 *pos++ = 1; /* one channel in the subband*/
225 }
226 }
227
228 if (ifmgd->extra_ie) {
229 pos = skb_put(skb, ifmgd->extra_ie_len);
230 memcpy(pos, ifmgd->extra_ie, ifmgd->extra_ie_len);
231 }
232
233 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
234 pos = skb_put(skb, 9);
235 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
236 *pos++ = 7; /* len */
237 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
238 *pos++ = 0x50;
239 *pos++ = 0xf2;
240 *pos++ = 2; /* WME */
241 *pos++ = 0; /* WME info */
242 *pos++ = 1; /* WME ver */
243 *pos++ = 0;
244 }
245
246 /* wmm support is a must to HT */
247 /*
248 * IEEE802.11n does not allow TKIP/WEP as pairwise
249 * ciphers in HT mode. We still associate in non-ht
250 * mode (11a/b/g) if any one of these ciphers is
251 * configured as pairwise.
252 */
253 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
254 sband->ht_cap.ht_supported &&
255 (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) &&
256 ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
257 (!(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))) {
258 struct ieee80211_ht_info *ht_info =
259 (struct ieee80211_ht_info *)(ht_ie + 2);
260 u16 cap = sband->ht_cap.cap;
261 __le16 tmp;
262 u32 flags = local->hw.conf.channel->flags;
263
264 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
265 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
266 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
267 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
268 cap &= ~IEEE80211_HT_CAP_SGI_40;
269 }
270 break;
271 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
272 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
273 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
274 cap &= ~IEEE80211_HT_CAP_SGI_40;
275 }
276 break;
277 }
278
279 tmp = cpu_to_le16(cap);
280 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
281 *pos++ = WLAN_EID_HT_CAPABILITY;
282 *pos++ = sizeof(struct ieee80211_ht_cap);
283 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
284 memcpy(pos, &tmp, sizeof(u16));
285 pos += sizeof(u16);
286 /* TODO: needs a define here for << 2 */
287 *pos++ = sband->ht_cap.ampdu_factor |
288 (sband->ht_cap.ampdu_density << 2);
289 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
290 }
291
292 kfree(ifmgd->assocreq_ies);
293 ifmgd->assocreq_ies_len = (skb->data + skb->len) - ies;
294 ifmgd->assocreq_ies = kmalloc(ifmgd->assocreq_ies_len, GFP_KERNEL);
295 if (ifmgd->assocreq_ies)
296 memcpy(ifmgd->assocreq_ies, ies, ifmgd->assocreq_ies_len);
297
298 ieee80211_tx_skb(sdata, skb, 0);
299 }
300
301
302 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
303 u16 stype, u16 reason)
304 {
305 struct ieee80211_local *local = sdata->local;
306 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
307 struct sk_buff *skb;
308 struct ieee80211_mgmt *mgmt;
309
310 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
311 if (!skb) {
312 printk(KERN_DEBUG "%s: failed to allocate buffer for "
313 "deauth/disassoc frame\n", sdata->dev->name);
314 return;
315 }
316 skb_reserve(skb, local->hw.extra_tx_headroom);
317
318 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
319 memset(mgmt, 0, 24);
320 memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
321 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
322 memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
323 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
324 skb_put(skb, 2);
325 /* u.deauth.reason_code == u.disassoc.reason_code */
326 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
327
328 ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
329 }
330
331 void ieee80211_send_pspoll(struct ieee80211_local *local,
332 struct ieee80211_sub_if_data *sdata)
333 {
334 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
335 struct ieee80211_pspoll *pspoll;
336 struct sk_buff *skb;
337 u16 fc;
338
339 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
340 if (!skb) {
341 printk(KERN_DEBUG "%s: failed to allocate buffer for "
342 "pspoll frame\n", sdata->dev->name);
343 return;
344 }
345 skb_reserve(skb, local->hw.extra_tx_headroom);
346
347 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
348 memset(pspoll, 0, sizeof(*pspoll));
349 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
350 pspoll->frame_control = cpu_to_le16(fc);
351 pspoll->aid = cpu_to_le16(ifmgd->aid);
352
353 /* aid in PS-Poll has its two MSBs each set to 1 */
354 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
355
356 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
357 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
358
359 ieee80211_tx_skb(sdata, skb, 0);
360 }
361
362 /* MLME */
363 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
364 struct ieee80211_if_managed *ifmgd,
365 u8 *wmm_param, size_t wmm_param_len)
366 {
367 struct ieee80211_tx_queue_params params;
368 size_t left;
369 int count;
370 u8 *pos;
371
372 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
373 return;
374
375 if (!wmm_param)
376 return;
377
378 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
379 return;
380 count = wmm_param[6] & 0x0f;
381 if (count == ifmgd->wmm_last_param_set)
382 return;
383 ifmgd->wmm_last_param_set = count;
384
385 pos = wmm_param + 8;
386 left = wmm_param_len - 8;
387
388 memset(&params, 0, sizeof(params));
389
390 local->wmm_acm = 0;
391 for (; left >= 4; left -= 4, pos += 4) {
392 int aci = (pos[0] >> 5) & 0x03;
393 int acm = (pos[0] >> 4) & 0x01;
394 int queue;
395
396 switch (aci) {
397 case 1: /* AC_BK */
398 queue = 3;
399 if (acm)
400 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
401 break;
402 case 2: /* AC_VI */
403 queue = 1;
404 if (acm)
405 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
406 break;
407 case 3: /* AC_VO */
408 queue = 0;
409 if (acm)
410 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
411 break;
412 case 0: /* AC_BE */
413 default:
414 queue = 2;
415 if (acm)
416 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
417 break;
418 }
419
420 params.aifs = pos[0] & 0x0f;
421 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
422 params.cw_min = ecw2cw(pos[1] & 0x0f);
423 params.txop = get_unaligned_le16(pos + 2);
424 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
425 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
426 "cWmin=%d cWmax=%d txop=%d\n",
427 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
428 params.cw_max, params.txop);
429 #endif
430 if (local->ops->conf_tx &&
431 local->ops->conf_tx(local_to_hw(local), queue, &params)) {
432 printk(KERN_DEBUG "%s: failed to set TX queue "
433 "parameters for queue %d\n", local->mdev->name, queue);
434 }
435 }
436 }
437
438 static bool ieee80211_check_tim(struct ieee802_11_elems *elems, u16 aid)
439 {
440 u8 mask;
441 u8 index, indexn1, indexn2;
442 struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *) elems->tim;
443
444 aid &= 0x3fff;
445 index = aid / 8;
446 mask = 1 << (aid & 7);
447
448 indexn1 = tim->bitmap_ctrl & 0xfe;
449 indexn2 = elems->tim_len + indexn1 - 4;
450
451 if (index < indexn1 || index > indexn2)
452 return false;
453
454 index -= indexn1;
455
456 return !!(tim->virtual_map[index] & mask);
457 }
458
459 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
460 u16 capab, bool erp_valid, u8 erp)
461 {
462 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
463 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
464 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
465 #endif
466 u32 changed = 0;
467 bool use_protection;
468 bool use_short_preamble;
469 bool use_short_slot;
470
471 if (erp_valid) {
472 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
473 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
474 } else {
475 use_protection = false;
476 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
477 }
478
479 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
480
481 if (use_protection != bss_conf->use_cts_prot) {
482 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
483 if (net_ratelimit()) {
484 printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
485 sdata->dev->name,
486 use_protection ? "enabled" : "disabled",
487 ifmgd->bssid);
488 }
489 #endif
490 bss_conf->use_cts_prot = use_protection;
491 changed |= BSS_CHANGED_ERP_CTS_PROT;
492 }
493
494 if (use_short_preamble != bss_conf->use_short_preamble) {
495 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
496 if (net_ratelimit()) {
497 printk(KERN_DEBUG "%s: switched to %s barker preamble"
498 " (BSSID=%pM)\n",
499 sdata->dev->name,
500 use_short_preamble ? "short" : "long",
501 ifmgd->bssid);
502 }
503 #endif
504 bss_conf->use_short_preamble = use_short_preamble;
505 changed |= BSS_CHANGED_ERP_PREAMBLE;
506 }
507
508 if (use_short_slot != bss_conf->use_short_slot) {
509 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
510 if (net_ratelimit()) {
511 printk(KERN_DEBUG "%s: switched to %s slot time"
512 " (BSSID=%pM)\n",
513 sdata->dev->name,
514 use_short_slot ? "short" : "long",
515 ifmgd->bssid);
516 }
517 #endif
518 bss_conf->use_short_slot = use_short_slot;
519 changed |= BSS_CHANGED_ERP_SLOT;
520 }
521
522 return changed;
523 }
524
525 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata)
526 {
527 union iwreq_data wrqu;
528
529 memset(&wrqu, 0, sizeof(wrqu));
530 if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED)
531 memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN);
532 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
533 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
534 }
535
536 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata)
537 {
538 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
539 char *buf;
540 size_t len;
541 int i;
542 union iwreq_data wrqu;
543
544 if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies)
545 return;
546
547 buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len +
548 ifmgd->assocresp_ies_len), GFP_KERNEL);
549 if (!buf)
550 return;
551
552 len = sprintf(buf, "ASSOCINFO(");
553 if (ifmgd->assocreq_ies) {
554 len += sprintf(buf + len, "ReqIEs=");
555 for (i = 0; i < ifmgd->assocreq_ies_len; i++) {
556 len += sprintf(buf + len, "%02x",
557 ifmgd->assocreq_ies[i]);
558 }
559 }
560 if (ifmgd->assocresp_ies) {
561 if (ifmgd->assocreq_ies)
562 len += sprintf(buf + len, " ");
563 len += sprintf(buf + len, "RespIEs=");
564 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
565 len += sprintf(buf + len, "%02x",
566 ifmgd->assocresp_ies[i]);
567 }
568 }
569 len += sprintf(buf + len, ")");
570
571 if (len > IW_CUSTOM_MAX) {
572 len = sprintf(buf, "ASSOCRESPIE=");
573 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
574 len += sprintf(buf + len, "%02x",
575 ifmgd->assocresp_ies[i]);
576 }
577 }
578
579 if (len <= IW_CUSTOM_MAX) {
580 memset(&wrqu, 0, sizeof(wrqu));
581 wrqu.data.length = len;
582 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
583 }
584
585 kfree(buf);
586 }
587
588
589 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
590 u32 bss_info_changed)
591 {
592 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
593 struct ieee80211_local *local = sdata->local;
594 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
595
596 struct ieee80211_bss *bss;
597
598 bss_info_changed |= BSS_CHANGED_ASSOC;
599 ifmgd->flags |= IEEE80211_STA_ASSOCIATED;
600
601 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
602 conf->channel->center_freq,
603 ifmgd->ssid, ifmgd->ssid_len);
604 if (bss) {
605 /* set timing information */
606 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
607 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
608 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
609
610 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
611 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
612
613 cfg80211_hold_bss(&bss->cbss);
614
615 ieee80211_rx_bss_put(local, bss);
616 }
617
618 ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET;
619 memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN);
620 ieee80211_sta_send_associnfo(sdata);
621
622 ifmgd->last_probe = jiffies;
623 ieee80211_led_assoc(local, 1);
624
625 sdata->vif.bss_conf.assoc = 1;
626 /*
627 * For now just always ask the driver to update the basic rateset
628 * when we have associated, we aren't checking whether it actually
629 * changed or not.
630 */
631 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
632 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
633
634 if (local->powersave) {
635 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) &&
636 local->hw.conf.dynamic_ps_timeout > 0) {
637 mod_timer(&local->dynamic_ps_timer, jiffies +
638 msecs_to_jiffies(
639 local->hw.conf.dynamic_ps_timeout));
640 } else {
641 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
642 ieee80211_send_nullfunc(local, sdata, 1);
643 conf->flags |= IEEE80211_CONF_PS;
644 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
645 }
646 }
647
648 netif_tx_start_all_queues(sdata->dev);
649 netif_carrier_on(sdata->dev);
650
651 ieee80211_sta_send_apinfo(sdata);
652 }
653
654 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata)
655 {
656 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
657 struct ieee80211_local *local = sdata->local;
658
659 ifmgd->direct_probe_tries++;
660 if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
661 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
662 sdata->dev->name, ifmgd->bssid);
663 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
664 ieee80211_sta_send_apinfo(sdata);
665
666 /*
667 * Most likely AP is not in the range so remove the
668 * bss information associated to the AP
669 */
670 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
671 sdata->local->hw.conf.channel->center_freq,
672 ifmgd->ssid, ifmgd->ssid_len);
673
674 /*
675 * We might have a pending scan which had no chance to run yet
676 * due to state == IEEE80211_STA_MLME_DIRECT_PROBE.
677 * Hence, queue the STAs work again
678 */
679 queue_work(local->hw.workqueue, &ifmgd->work);
680 return;
681 }
682
683 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
684 sdata->dev->name, ifmgd->bssid,
685 ifmgd->direct_probe_tries);
686
687 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
688
689 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifmgd->request);
690
691 /* Direct probe is sent to broadcast address as some APs
692 * will not answer to direct packet in unassociated state.
693 */
694 ieee80211_send_probe_req(sdata, NULL,
695 ifmgd->ssid, ifmgd->ssid_len, NULL, 0);
696
697 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
698 }
699
700
701 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata)
702 {
703 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
704 struct ieee80211_local *local = sdata->local;
705 u8 *ies;
706 size_t ies_len;
707
708 ifmgd->auth_tries++;
709 if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
710 printk(KERN_DEBUG "%s: authentication with AP %pM"
711 " timed out\n",
712 sdata->dev->name, ifmgd->bssid);
713 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
714 ieee80211_sta_send_apinfo(sdata);
715 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
716 sdata->local->hw.conf.channel->center_freq,
717 ifmgd->ssid, ifmgd->ssid_len);
718
719 /*
720 * We might have a pending scan which had no chance to run yet
721 * due to state == IEEE80211_STA_MLME_AUTHENTICATE.
722 * Hence, queue the STAs work again
723 */
724 queue_work(local->hw.workqueue, &ifmgd->work);
725 return;
726 }
727
728 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
729 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
730 sdata->dev->name, ifmgd->bssid);
731
732 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
733 ies = ifmgd->sme_auth_ie;
734 ies_len = ifmgd->sme_auth_ie_len;
735 } else {
736 ies = NULL;
737 ies_len = 0;
738 }
739 ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ies, ies_len,
740 ifmgd->bssid, 0);
741 ifmgd->auth_transaction = 2;
742
743 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
744 }
745
746 /*
747 * The disassoc 'reason' argument can be either our own reason
748 * if self disconnected or a reason code from the AP.
749 */
750 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
751 bool deauth, bool self_disconnected,
752 u16 reason)
753 {
754 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
755 struct ieee80211_local *local = sdata->local;
756 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
757 struct ieee80211_bss *bss;
758 struct sta_info *sta;
759 u32 changed = 0, config_changed = 0;
760
761 rcu_read_lock();
762
763 sta = sta_info_get(local, ifmgd->bssid);
764 if (!sta) {
765 rcu_read_unlock();
766 return;
767 }
768
769 if (deauth) {
770 ifmgd->direct_probe_tries = 0;
771 ifmgd->auth_tries = 0;
772 }
773 ifmgd->assoc_scan_tries = 0;
774 ifmgd->assoc_tries = 0;
775
776 netif_tx_stop_all_queues(sdata->dev);
777 netif_carrier_off(sdata->dev);
778
779 ieee80211_sta_tear_down_BA_sessions(sta);
780
781 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
782 conf->channel->center_freq,
783 ifmgd->ssid, ifmgd->ssid_len);
784
785 if (bss) {
786 cfg80211_unhold_bss(&bss->cbss);
787 ieee80211_rx_bss_put(local, bss);
788 }
789
790 if (self_disconnected) {
791 if (deauth)
792 ieee80211_send_deauth_disassoc(sdata,
793 IEEE80211_STYPE_DEAUTH, reason);
794 else
795 ieee80211_send_deauth_disassoc(sdata,
796 IEEE80211_STYPE_DISASSOC, reason);
797 }
798
799 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
800 changed |= ieee80211_reset_erp_info(sdata);
801
802 ieee80211_led_assoc(local, 0);
803 changed |= BSS_CHANGED_ASSOC;
804 sdata->vif.bss_conf.assoc = false;
805
806 ieee80211_sta_send_apinfo(sdata);
807
808 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
809 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
810 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
811 sdata->local->hw.conf.channel->center_freq,
812 ifmgd->ssid, ifmgd->ssid_len);
813 }
814
815 rcu_read_unlock();
816
817 /* channel(_type) changes are handled by ieee80211_hw_config */
818 local->oper_channel_type = NL80211_CHAN_NO_HT;
819
820 local->power_constr_level = 0;
821
822 del_timer_sync(&local->dynamic_ps_timer);
823 cancel_work_sync(&local->dynamic_ps_enable_work);
824
825 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
826 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
827 config_changed |= IEEE80211_CONF_CHANGE_PS;
828 }
829
830 ieee80211_hw_config(local, config_changed);
831 ieee80211_bss_info_change_notify(sdata, changed);
832
833 rcu_read_lock();
834
835 sta = sta_info_get(local, ifmgd->bssid);
836 if (!sta) {
837 rcu_read_unlock();
838 return;
839 }
840
841 sta_info_unlink(&sta);
842
843 rcu_read_unlock();
844
845 sta_info_destroy(sta);
846 }
847
848 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
849 {
850 if (!sdata || !sdata->default_key ||
851 sdata->default_key->conf.alg != ALG_WEP)
852 return 0;
853 return 1;
854 }
855
856 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata)
857 {
858 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
859 struct ieee80211_local *local = sdata->local;
860 struct ieee80211_bss *bss;
861 int bss_privacy;
862 int wep_privacy;
863 int privacy_invoked;
864
865 if (!ifmgd || (ifmgd->flags & IEEE80211_STA_EXT_SME))
866 return 0;
867
868 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
869 local->hw.conf.channel->center_freq,
870 ifmgd->ssid, ifmgd->ssid_len);
871 if (!bss)
872 return 0;
873
874 bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY);
875 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
876 privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED);
877
878 ieee80211_rx_bss_put(local, bss);
879
880 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
881 return 0;
882
883 return 1;
884 }
885
886 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata)
887 {
888 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
889 struct ieee80211_local *local = sdata->local;
890
891 ifmgd->assoc_tries++;
892 if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
893 printk(KERN_DEBUG "%s: association with AP %pM"
894 " timed out\n",
895 sdata->dev->name, ifmgd->bssid);
896 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
897 ieee80211_sta_send_apinfo(sdata);
898 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
899 sdata->local->hw.conf.channel->center_freq,
900 ifmgd->ssid, ifmgd->ssid_len);
901 /*
902 * We might have a pending scan which had no chance to run yet
903 * due to state == IEEE80211_STA_MLME_ASSOCIATE.
904 * Hence, queue the STAs work again
905 */
906 queue_work(local->hw.workqueue, &ifmgd->work);
907 return;
908 }
909
910 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
911 printk(KERN_DEBUG "%s: associate with AP %pM\n",
912 sdata->dev->name, ifmgd->bssid);
913 if (ieee80211_privacy_mismatch(sdata)) {
914 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
915 "mixed-cell disabled - abort association\n", sdata->dev->name);
916 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
917 return;
918 }
919
920 ieee80211_send_assoc(sdata);
921
922 mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
923 }
924
925 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
926 struct ieee80211_hdr *hdr)
927 {
928 /*
929 * We can postpone the mgd.timer whenever receiving unicast frames
930 * from AP because we know that the connection is working both ways
931 * at that time. But multicast frames (and hence also beacons) must
932 * be ignored here, because we need to trigger the timer during
933 * data idle periods for sending the periodical probe request to
934 * the AP.
935 */
936 if (!is_multicast_ether_addr(hdr->addr1))
937 mod_timer(&sdata->u.mgd.timer,
938 jiffies + IEEE80211_MONITORING_INTERVAL);
939 }
940
941 void ieee80211_beacon_loss_work(struct work_struct *work)
942 {
943 struct ieee80211_sub_if_data *sdata =
944 container_of(work, struct ieee80211_sub_if_data,
945 u.mgd.beacon_loss_work);
946 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
947
948 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
949 if (net_ratelimit()) {
950 printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM "
951 "- sending probe request\n", sdata->dev->name,
952 sdata->u.mgd.bssid);
953 }
954 #endif
955
956 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
957 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
958 ifmgd->ssid_len, NULL, 0);
959
960 mod_timer(&ifmgd->timer, jiffies + IEEE80211_MONITORING_INTERVAL);
961 }
962
963 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
964 {
965 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
966
967 queue_work(sdata->local->hw.workqueue,
968 &sdata->u.mgd.beacon_loss_work);
969 }
970 EXPORT_SYMBOL(ieee80211_beacon_loss);
971
972 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
973 {
974 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
975 struct ieee80211_local *local = sdata->local;
976 struct sta_info *sta;
977 bool disassoc = false;
978
979 /* TODO: start monitoring current AP signal quality and number of
980 * missed beacons. Scan other channels every now and then and search
981 * for better APs. */
982 /* TODO: remove expired BSSes */
983
984 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED;
985
986 rcu_read_lock();
987
988 sta = sta_info_get(local, ifmgd->bssid);
989 if (!sta) {
990 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
991 sdata->dev->name, ifmgd->bssid);
992 disassoc = true;
993 goto unlock;
994 }
995
996 if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) &&
997 time_after(jiffies, sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
998 printk(KERN_DEBUG "%s: no probe response from AP %pM "
999 "- disassociating\n",
1000 sdata->dev->name, ifmgd->bssid);
1001 disassoc = true;
1002 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1003 goto unlock;
1004 }
1005
1006 /*
1007 * Beacon filtering is only enabled with power save and then the
1008 * stack should not check for beacon loss.
1009 */
1010 if (!((local->hw.flags & IEEE80211_HW_BEACON_FILTER) &&
1011 (local->hw.conf.flags & IEEE80211_CONF_PS)) &&
1012 time_after(jiffies,
1013 ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) {
1014 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1015 if (net_ratelimit()) {
1016 printk(KERN_DEBUG "%s: beacon loss from AP %pM "
1017 "- sending probe request\n",
1018 sdata->dev->name, ifmgd->bssid);
1019 }
1020 #endif
1021 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1022 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1023 ifmgd->ssid_len, NULL, 0);
1024 goto unlock;
1025
1026 }
1027
1028 if (time_after(jiffies, sta->last_rx + IEEE80211_PROBE_IDLE_TIME)) {
1029 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1030 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1031 ifmgd->ssid_len, NULL, 0);
1032 }
1033
1034 unlock:
1035 rcu_read_unlock();
1036
1037 if (disassoc)
1038 ieee80211_set_disassoc(sdata, true, true,
1039 WLAN_REASON_PREV_AUTH_NOT_VALID);
1040 else
1041 mod_timer(&ifmgd->timer, jiffies +
1042 IEEE80211_MONITORING_INTERVAL);
1043 }
1044
1045
1046 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata)
1047 {
1048 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1049
1050 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1051 ifmgd->flags |= IEEE80211_STA_AUTHENTICATED;
1052 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1053 /* Wait for SME to request association */
1054 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1055 } else
1056 ieee80211_associate(sdata);
1057 }
1058
1059
1060 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1061 struct ieee80211_mgmt *mgmt,
1062 size_t len)
1063 {
1064 u8 *pos;
1065 struct ieee802_11_elems elems;
1066
1067 pos = mgmt->u.auth.variable;
1068 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1069 if (!elems.challenge)
1070 return;
1071 ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg,
1072 elems.challenge - 2, elems.challenge_len + 2,
1073 sdata->u.mgd.bssid, 1);
1074 sdata->u.mgd.auth_transaction = 4;
1075 }
1076
1077 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1078 struct ieee80211_mgmt *mgmt,
1079 size_t len)
1080 {
1081 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1082 u16 auth_alg, auth_transaction, status_code;
1083
1084 if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE)
1085 return;
1086
1087 if (len < 24 + 6)
1088 return;
1089
1090 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1091 return;
1092
1093 if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1094 return;
1095
1096 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1097 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1098 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1099
1100 if (auth_alg != ifmgd->auth_alg ||
1101 auth_transaction != ifmgd->auth_transaction)
1102 return;
1103
1104 if (status_code != WLAN_STATUS_SUCCESS) {
1105 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1106 u8 algs[3];
1107 const int num_algs = ARRAY_SIZE(algs);
1108 int i, pos;
1109 algs[0] = algs[1] = algs[2] = 0xff;
1110 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1111 algs[0] = WLAN_AUTH_OPEN;
1112 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1113 algs[1] = WLAN_AUTH_SHARED_KEY;
1114 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1115 algs[2] = WLAN_AUTH_LEAP;
1116 if (ifmgd->auth_alg == WLAN_AUTH_OPEN)
1117 pos = 0;
1118 else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY)
1119 pos = 1;
1120 else
1121 pos = 2;
1122 for (i = 0; i < num_algs; i++) {
1123 pos++;
1124 if (pos >= num_algs)
1125 pos = 0;
1126 if (algs[pos] == ifmgd->auth_alg ||
1127 algs[pos] == 0xff)
1128 continue;
1129 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1130 !ieee80211_sta_wep_configured(sdata))
1131 continue;
1132 ifmgd->auth_alg = algs[pos];
1133 break;
1134 }
1135 }
1136 return;
1137 }
1138
1139 switch (ifmgd->auth_alg) {
1140 case WLAN_AUTH_OPEN:
1141 case WLAN_AUTH_LEAP:
1142 case WLAN_AUTH_FT:
1143 ieee80211_auth_completed(sdata);
1144 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1145 break;
1146 case WLAN_AUTH_SHARED_KEY:
1147 if (ifmgd->auth_transaction == 4) {
1148 ieee80211_auth_completed(sdata);
1149 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1150 } else
1151 ieee80211_auth_challenge(sdata, mgmt, len);
1152 break;
1153 }
1154 }
1155
1156
1157 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1158 struct ieee80211_mgmt *mgmt,
1159 size_t len)
1160 {
1161 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1162 u16 reason_code;
1163
1164 if (len < 24 + 2)
1165 return;
1166
1167 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1168 return;
1169
1170 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1171
1172 if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED)
1173 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1174 sdata->dev->name, reason_code);
1175
1176 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1177 (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1178 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE ||
1179 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) {
1180 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1181 mod_timer(&ifmgd->timer, jiffies +
1182 IEEE80211_RETRY_AUTH_INTERVAL);
1183 }
1184
1185 ieee80211_set_disassoc(sdata, true, false, 0);
1186 ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED;
1187 cfg80211_send_rx_deauth(sdata->dev, (u8 *) mgmt, len);
1188 }
1189
1190
1191 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1192 struct ieee80211_mgmt *mgmt,
1193 size_t len)
1194 {
1195 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1196 u16 reason_code;
1197
1198 if (len < 24 + 2)
1199 return;
1200
1201 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1202 return;
1203
1204 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1205
1206 if (ifmgd->flags & IEEE80211_STA_ASSOCIATED)
1207 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1208 sdata->dev->name, reason_code);
1209
1210 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1211 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1212 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1213 mod_timer(&ifmgd->timer, jiffies +
1214 IEEE80211_RETRY_AUTH_INTERVAL);
1215 }
1216
1217 ieee80211_set_disassoc(sdata, false, false, reason_code);
1218 cfg80211_send_rx_disassoc(sdata->dev, (u8 *) mgmt, len);
1219 }
1220
1221
1222 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1223 struct ieee80211_mgmt *mgmt,
1224 size_t len,
1225 int reassoc)
1226 {
1227 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1228 struct ieee80211_local *local = sdata->local;
1229 struct ieee80211_supported_band *sband;
1230 struct sta_info *sta;
1231 u32 rates, basic_rates;
1232 u16 capab_info, status_code, aid;
1233 struct ieee802_11_elems elems;
1234 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1235 u8 *pos;
1236 u32 changed = 0;
1237 int i, j;
1238 bool have_higher_than_11mbit = false, newsta = false;
1239 u16 ap_ht_cap_flags;
1240
1241 /* AssocResp and ReassocResp have identical structure, so process both
1242 * of them in this function. */
1243
1244 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1245 return;
1246
1247 if (len < 24 + 6)
1248 return;
1249
1250 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1251 return;
1252
1253 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1254 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1255 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1256
1257 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1258 "status=%d aid=%d)\n",
1259 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1260 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1261
1262 pos = mgmt->u.assoc_resp.variable;
1263 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1264
1265 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1266 elems.timeout_int && elems.timeout_int_len == 5 &&
1267 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1268 u32 tu, ms;
1269 tu = get_unaligned_le32(elems.timeout_int + 1);
1270 ms = tu * 1024 / 1000;
1271 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1272 "comeback duration %u TU (%u ms)\n",
1273 sdata->dev->name, tu, ms);
1274 if (ms > IEEE80211_ASSOC_TIMEOUT)
1275 mod_timer(&ifmgd->timer,
1276 jiffies + msecs_to_jiffies(ms));
1277 return;
1278 }
1279
1280 if (status_code != WLAN_STATUS_SUCCESS) {
1281 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1282 sdata->dev->name, status_code);
1283 /* if this was a reassociation, ensure we try a "full"
1284 * association next time. This works around some broken APs
1285 * which do not correctly reject reassociation requests. */
1286 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1287 return;
1288 }
1289
1290 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1291 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1292 "set\n", sdata->dev->name, aid);
1293 aid &= ~(BIT(15) | BIT(14));
1294
1295 if (!elems.supp_rates) {
1296 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1297 sdata->dev->name);
1298 return;
1299 }
1300
1301 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1302 ifmgd->aid = aid;
1303 ifmgd->ap_capab = capab_info;
1304
1305 kfree(ifmgd->assocresp_ies);
1306 ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1307 ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL);
1308 if (ifmgd->assocresp_ies)
1309 memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len);
1310
1311 rcu_read_lock();
1312
1313 /* Add STA entry for the AP */
1314 sta = sta_info_get(local, ifmgd->bssid);
1315 if (!sta) {
1316 newsta = true;
1317
1318 sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC);
1319 if (!sta) {
1320 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1321 " the AP\n", sdata->dev->name);
1322 rcu_read_unlock();
1323 return;
1324 }
1325
1326 /* update new sta with its last rx activity */
1327 sta->last_rx = jiffies;
1328 }
1329
1330 /*
1331 * FIXME: Do we really need to update the sta_info's information here?
1332 * We already know about the AP (we found it in our list) so it
1333 * should already be filled with the right info, no?
1334 * As is stands, all this is racy because typically we assume
1335 * the information that is filled in here (except flags) doesn't
1336 * change while a STA structure is alive. As such, it should move
1337 * to between the sta_info_alloc() and sta_info_insert() above.
1338 */
1339
1340 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1341 WLAN_STA_AUTHORIZED);
1342
1343 rates = 0;
1344 basic_rates = 0;
1345 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1346
1347 for (i = 0; i < elems.supp_rates_len; i++) {
1348 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1349 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1350
1351 if (rate > 110)
1352 have_higher_than_11mbit = true;
1353
1354 for (j = 0; j < sband->n_bitrates; j++) {
1355 if (sband->bitrates[j].bitrate == rate) {
1356 rates |= BIT(j);
1357 if (is_basic)
1358 basic_rates |= BIT(j);
1359 break;
1360 }
1361 }
1362 }
1363
1364 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1365 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1366 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1367
1368 if (rate > 110)
1369 have_higher_than_11mbit = true;
1370
1371 for (j = 0; j < sband->n_bitrates; j++) {
1372 if (sband->bitrates[j].bitrate == rate) {
1373 rates |= BIT(j);
1374 if (is_basic)
1375 basic_rates |= BIT(j);
1376 break;
1377 }
1378 }
1379 }
1380
1381 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1382 sdata->vif.bss_conf.basic_rates = basic_rates;
1383
1384 /* cf. IEEE 802.11 9.2.12 */
1385 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1386 have_higher_than_11mbit)
1387 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1388 else
1389 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1390
1391 /* If TKIP/WEP is used, no need to parse AP's HT capabilities */
1392 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1393 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1394 elems.ht_cap_elem, &sta->sta.ht_cap);
1395
1396 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1397
1398 rate_control_rate_init(sta);
1399
1400 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1401 set_sta_flags(sta, WLAN_STA_MFP);
1402
1403 if (elems.wmm_param)
1404 set_sta_flags(sta, WLAN_STA_WME);
1405
1406 if (newsta) {
1407 int err = sta_info_insert(sta);
1408 if (err) {
1409 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1410 " the AP (error %d)\n", sdata->dev->name, err);
1411 rcu_read_unlock();
1412 return;
1413 }
1414 }
1415
1416 rcu_read_unlock();
1417
1418 if (elems.wmm_param)
1419 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1420 elems.wmm_param_len);
1421
1422 if (elems.ht_info_elem && elems.wmm_param &&
1423 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1424 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1425 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1426 ap_ht_cap_flags);
1427
1428 /* set AID and assoc capability,
1429 * ieee80211_set_associated() will tell the driver */
1430 bss_conf->aid = aid;
1431 bss_conf->assoc_capability = capab_info;
1432 ieee80211_set_associated(sdata, changed);
1433
1434 /*
1435 * initialise the time of last beacon to be the association time,
1436 * otherwise beacon loss check will trigger immediately
1437 */
1438 ifmgd->last_beacon = jiffies;
1439
1440 ieee80211_associated(sdata);
1441 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1442 }
1443
1444
1445 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1446 struct ieee80211_mgmt *mgmt,
1447 size_t len,
1448 struct ieee80211_rx_status *rx_status,
1449 struct ieee802_11_elems *elems,
1450 bool beacon)
1451 {
1452 struct ieee80211_local *local = sdata->local;
1453 int freq;
1454 struct ieee80211_bss *bss;
1455 struct ieee80211_channel *channel;
1456
1457 if (elems->ds_params && elems->ds_params_len == 1)
1458 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1459 else
1460 freq = rx_status->freq;
1461
1462 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1463
1464 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1465 return;
1466
1467 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1468 channel, beacon);
1469 if (!bss)
1470 return;
1471
1472 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1473 (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) {
1474 struct ieee80211_channel_sw_ie *sw_elem =
1475 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1476 ieee80211_process_chanswitch(sdata, sw_elem, bss);
1477 }
1478
1479 ieee80211_rx_bss_put(local, bss);
1480 }
1481
1482
1483 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1484 struct ieee80211_mgmt *mgmt,
1485 size_t len,
1486 struct ieee80211_rx_status *rx_status)
1487 {
1488 struct ieee80211_if_managed *ifmgd;
1489 size_t baselen;
1490 struct ieee802_11_elems elems;
1491
1492 ifmgd = &sdata->u.mgd;
1493
1494 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1495 return; /* ignore ProbeResp to foreign address */
1496
1497 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1498 if (baselen > len)
1499 return;
1500
1501 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1502 &elems);
1503
1504 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1505
1506 /* direct probe may be part of the association flow */
1507 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1508 &ifmgd->request)) {
1509 printk(KERN_DEBUG "%s direct probe responded\n",
1510 sdata->dev->name);
1511 ieee80211_authenticate(sdata);
1512 }
1513
1514 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
1515 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1516 }
1517
1518 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1519 struct ieee80211_mgmt *mgmt,
1520 size_t len,
1521 struct ieee80211_rx_status *rx_status)
1522 {
1523 struct ieee80211_if_managed *ifmgd;
1524 size_t baselen;
1525 struct ieee802_11_elems elems;
1526 struct ieee80211_local *local = sdata->local;
1527 u32 changed = 0;
1528 bool erp_valid, directed_tim;
1529 u8 erp_value = 0;
1530
1531 /* Process beacon from the current BSS */
1532 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1533 if (baselen > len)
1534 return;
1535
1536 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1537
1538 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
1539
1540 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1541 return;
1542
1543 ifmgd = &sdata->u.mgd;
1544
1545 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) ||
1546 memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1547 return;
1548
1549 if (rx_status->freq != local->hw.conf.channel->center_freq)
1550 return;
1551
1552 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1553 elems.wmm_param_len);
1554
1555 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1556 directed_tim = ieee80211_check_tim(&elems, ifmgd->aid);
1557
1558 if (directed_tim) {
1559 if (local->hw.conf.dynamic_ps_timeout > 0) {
1560 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1561 ieee80211_hw_config(local,
1562 IEEE80211_CONF_CHANGE_PS);
1563 ieee80211_send_nullfunc(local, sdata, 0);
1564 } else {
1565 local->pspolling = true;
1566
1567 /*
1568 * Here is assumed that the driver will be
1569 * able to send ps-poll frame and receive a
1570 * response even though power save mode is
1571 * enabled, but some drivers might require
1572 * to disable power save here. This needs
1573 * to be investigated.
1574 */
1575 ieee80211_send_pspoll(local, sdata);
1576 }
1577 }
1578 }
1579
1580 if (elems.erp_info && elems.erp_info_len >= 1) {
1581 erp_valid = true;
1582 erp_value = elems.erp_info[0];
1583 } else {
1584 erp_valid = false;
1585 }
1586 changed |= ieee80211_handle_bss_capability(sdata,
1587 le16_to_cpu(mgmt->u.beacon.capab_info),
1588 erp_valid, erp_value);
1589
1590
1591 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1592 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) {
1593 struct sta_info *sta;
1594 struct ieee80211_supported_band *sband;
1595 u16 ap_ht_cap_flags;
1596
1597 rcu_read_lock();
1598
1599 sta = sta_info_get(local, ifmgd->bssid);
1600 if (!sta) {
1601 rcu_read_unlock();
1602 return;
1603 }
1604
1605 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1606
1607 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1608 elems.ht_cap_elem, &sta->sta.ht_cap);
1609
1610 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1611
1612 rcu_read_unlock();
1613
1614 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1615 ap_ht_cap_flags);
1616 }
1617
1618 if (elems.country_elem) {
1619 /* Note we are only reviewing this on beacons
1620 * for the BSSID we are associated to */
1621 regulatory_hint_11d(local->hw.wiphy,
1622 elems.country_elem, elems.country_elem_len);
1623
1624 /* TODO: IBSS also needs this */
1625 if (elems.pwr_constr_elem)
1626 ieee80211_handle_pwr_constr(sdata,
1627 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1628 elems.pwr_constr_elem,
1629 elems.pwr_constr_elem_len);
1630 }
1631
1632 ieee80211_bss_info_change_notify(sdata, changed);
1633 }
1634
1635 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1636 struct sk_buff *skb,
1637 struct ieee80211_rx_status *rx_status)
1638 {
1639 struct ieee80211_local *local = sdata->local;
1640 struct ieee80211_mgmt *mgmt;
1641 u16 fc;
1642
1643 if (skb->len < 24)
1644 return RX_DROP_MONITOR;
1645
1646 mgmt = (struct ieee80211_mgmt *) skb->data;
1647 fc = le16_to_cpu(mgmt->frame_control);
1648
1649 switch (fc & IEEE80211_FCTL_STYPE) {
1650 case IEEE80211_STYPE_PROBE_REQ:
1651 case IEEE80211_STYPE_PROBE_RESP:
1652 case IEEE80211_STYPE_BEACON:
1653 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1654 case IEEE80211_STYPE_AUTH:
1655 case IEEE80211_STYPE_ASSOC_RESP:
1656 case IEEE80211_STYPE_REASSOC_RESP:
1657 case IEEE80211_STYPE_DEAUTH:
1658 case IEEE80211_STYPE_DISASSOC:
1659 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1660 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
1661 return RX_QUEUED;
1662 }
1663
1664 return RX_DROP_MONITOR;
1665 }
1666
1667 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1668 struct sk_buff *skb)
1669 {
1670 struct ieee80211_rx_status *rx_status;
1671 struct ieee80211_mgmt *mgmt;
1672 u16 fc;
1673
1674 rx_status = (struct ieee80211_rx_status *) skb->cb;
1675 mgmt = (struct ieee80211_mgmt *) skb->data;
1676 fc = le16_to_cpu(mgmt->frame_control);
1677
1678 switch (fc & IEEE80211_FCTL_STYPE) {
1679 case IEEE80211_STYPE_PROBE_RESP:
1680 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
1681 rx_status);
1682 break;
1683 case IEEE80211_STYPE_BEACON:
1684 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1685 rx_status);
1686 break;
1687 case IEEE80211_STYPE_AUTH:
1688 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
1689 break;
1690 case IEEE80211_STYPE_ASSOC_RESP:
1691 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0);
1692 break;
1693 case IEEE80211_STYPE_REASSOC_RESP:
1694 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1);
1695 break;
1696 case IEEE80211_STYPE_DEAUTH:
1697 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1698 break;
1699 case IEEE80211_STYPE_DISASSOC:
1700 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1701 break;
1702 }
1703
1704 kfree_skb(skb);
1705 }
1706
1707 static void ieee80211_sta_timer(unsigned long data)
1708 {
1709 struct ieee80211_sub_if_data *sdata =
1710 (struct ieee80211_sub_if_data *) data;
1711 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1712 struct ieee80211_local *local = sdata->local;
1713
1714 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1715 queue_work(local->hw.workqueue, &ifmgd->work);
1716 }
1717
1718 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata)
1719 {
1720 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1721 struct ieee80211_local *local = sdata->local;
1722
1723 if (local->ops->reset_tsf) {
1724 /* Reset own TSF to allow time synchronization work. */
1725 local->ops->reset_tsf(local_to_hw(local));
1726 }
1727
1728 ifmgd->wmm_last_param_set = -1; /* allow any WMM update */
1729
1730
1731 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1732 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1733 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1734 ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY;
1735 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1736 ifmgd->auth_alg = WLAN_AUTH_LEAP;
1737 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_FT)
1738 ifmgd->auth_alg = WLAN_AUTH_FT;
1739 else
1740 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1741 ifmgd->auth_transaction = -1;
1742 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
1743 ifmgd->assoc_scan_tries = 0;
1744 ifmgd->direct_probe_tries = 0;
1745 ifmgd->auth_tries = 0;
1746 ifmgd->assoc_tries = 0;
1747 netif_tx_stop_all_queues(sdata->dev);
1748 netif_carrier_off(sdata->dev);
1749 }
1750
1751 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata)
1752 {
1753 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1754 struct ieee80211_local *local = sdata->local;
1755 struct ieee80211_bss *bss;
1756 u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid;
1757 u8 ssid_len = ifmgd->ssid_len;
1758 u16 capa_mask = WLAN_CAPABILITY_ESS;
1759 u16 capa_val = WLAN_CAPABILITY_ESS;
1760 struct ieee80211_channel *chan = local->oper_channel;
1761
1762 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1763 ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL |
1764 IEEE80211_STA_AUTO_BSSID_SEL |
1765 IEEE80211_STA_AUTO_CHANNEL_SEL)) {
1766 capa_mask |= WLAN_CAPABILITY_PRIVACY;
1767 if (sdata->default_key)
1768 capa_val |= WLAN_CAPABILITY_PRIVACY;
1769 }
1770
1771 if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
1772 chan = NULL;
1773
1774 if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL)
1775 bssid = NULL;
1776
1777 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) {
1778 ssid = NULL;
1779 ssid_len = 0;
1780 }
1781
1782 bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
1783 bssid, ssid, ssid_len,
1784 capa_mask, capa_val);
1785
1786 if (bss) {
1787 ieee80211_set_freq(sdata, bss->cbss.channel->center_freq);
1788 if (!(ifmgd->flags & IEEE80211_STA_SSID_SET))
1789 ieee80211_sta_set_ssid(sdata, bss->ssid,
1790 bss->ssid_len);
1791 ieee80211_sta_set_bssid(sdata, bss->cbss.bssid);
1792 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
1793 bss->supp_rates);
1794 if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED)
1795 sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED;
1796 else
1797 sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED;
1798
1799 /* Send out direct probe if no probe resp was received or
1800 * the one we have is outdated
1801 */
1802 if (!bss->last_probe_resp ||
1803 time_after(jiffies, bss->last_probe_resp
1804 + IEEE80211_SCAN_RESULT_EXPIRE))
1805 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1806 else
1807 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
1808
1809 ieee80211_rx_bss_put(local, bss);
1810 ieee80211_sta_reset_auth(sdata);
1811 return 0;
1812 } else {
1813 if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
1814 ifmgd->assoc_scan_tries++;
1815 /* XXX maybe racy? */
1816 if (local->scan_req)
1817 return -1;
1818 memcpy(local->int_scan_req.ssids[0].ssid,
1819 ifmgd->ssid, IEEE80211_MAX_SSID_LEN);
1820 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL)
1821 local->int_scan_req.ssids[0].ssid_len = 0;
1822 else
1823 local->int_scan_req.ssids[0].ssid_len = ifmgd->ssid_len;
1824
1825 if (ieee80211_start_scan(sdata, &local->int_scan_req))
1826 ieee80211_scan_failed(local);
1827
1828 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
1829 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
1830 } else {
1831 ifmgd->assoc_scan_tries = 0;
1832 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1833 }
1834 }
1835 return -1;
1836 }
1837
1838
1839 static void ieee80211_sta_work(struct work_struct *work)
1840 {
1841 struct ieee80211_sub_if_data *sdata =
1842 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
1843 struct ieee80211_local *local = sdata->local;
1844 struct ieee80211_if_managed *ifmgd;
1845 struct sk_buff *skb;
1846
1847 if (!netif_running(sdata->dev))
1848 return;
1849
1850 if (local->sw_scanning || local->hw_scanning)
1851 return;
1852
1853 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1854 return;
1855 ifmgd = &sdata->u.mgd;
1856
1857 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
1858 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1859
1860 if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
1861 ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE &&
1862 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE &&
1863 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) {
1864 /*
1865 * The call to ieee80211_start_scan can fail but ieee80211_request_scan
1866 * (which queued ieee80211_sta_work) did not return an error. Thus, call
1867 * ieee80211_scan_failed here if ieee80211_start_scan fails in order to
1868 * notify the scan requester.
1869 */
1870 if (ieee80211_start_scan(sdata, local->scan_req))
1871 ieee80211_scan_failed(local);
1872 return;
1873 }
1874
1875 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) {
1876 if (ieee80211_sta_config_auth(sdata))
1877 return;
1878 clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1879 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request))
1880 return;
1881
1882 switch (ifmgd->state) {
1883 case IEEE80211_STA_MLME_DISABLED:
1884 break;
1885 case IEEE80211_STA_MLME_DIRECT_PROBE:
1886 ieee80211_direct_probe(sdata);
1887 break;
1888 case IEEE80211_STA_MLME_AUTHENTICATE:
1889 ieee80211_authenticate(sdata);
1890 break;
1891 case IEEE80211_STA_MLME_ASSOCIATE:
1892 ieee80211_associate(sdata);
1893 break;
1894 case IEEE80211_STA_MLME_ASSOCIATED:
1895 ieee80211_associated(sdata);
1896 break;
1897 default:
1898 WARN_ON(1);
1899 break;
1900 }
1901
1902 if (ieee80211_privacy_mismatch(sdata)) {
1903 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
1904 "mixed-cell disabled - disassociate\n", sdata->dev->name);
1905
1906 ieee80211_set_disassoc(sdata, false, true,
1907 WLAN_REASON_UNSPECIFIED);
1908 }
1909 }
1910
1911 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
1912 {
1913 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1914 queue_work(sdata->local->hw.workqueue,
1915 &sdata->u.mgd.work);
1916 }
1917
1918 /* interface setup */
1919 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
1920 {
1921 struct ieee80211_if_managed *ifmgd;
1922
1923 ifmgd = &sdata->u.mgd;
1924 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
1925 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1926 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
1927 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
1928 (unsigned long) sdata);
1929 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
1930 (unsigned long) sdata);
1931 skb_queue_head_init(&ifmgd->skb_queue);
1932
1933 ifmgd->capab = WLAN_CAPABILITY_ESS;
1934 ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN |
1935 IEEE80211_AUTH_ALG_SHARED_KEY;
1936 ifmgd->flags |= IEEE80211_STA_CREATE_IBSS |
1937 IEEE80211_STA_AUTO_BSSID_SEL |
1938 IEEE80211_STA_AUTO_CHANNEL_SEL;
1939 if (sdata->local->hw.queues >= 4)
1940 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
1941 }
1942
1943 /* configuration hooks */
1944 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata)
1945 {
1946 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1947 struct ieee80211_local *local = sdata->local;
1948
1949 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1950 return;
1951
1952 if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET |
1953 IEEE80211_STA_AUTO_BSSID_SEL)) &&
1954 (ifmgd->flags & (IEEE80211_STA_SSID_SET |
1955 IEEE80211_STA_AUTO_SSID_SEL))) {
1956
1957 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)
1958 ieee80211_set_disassoc(sdata, true, true,
1959 WLAN_REASON_DEAUTH_LEAVING);
1960
1961 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) ||
1962 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1963 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
1964 else if (ifmgd->flags & IEEE80211_STA_EXT_SME)
1965 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1966 queue_work(local->hw.workqueue, &ifmgd->work);
1967 }
1968 }
1969
1970 int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata)
1971 {
1972 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1973
1974 if (ifmgd->ssid_len)
1975 ifmgd->flags |= IEEE80211_STA_SSID_SET;
1976 else
1977 ifmgd->flags &= ~IEEE80211_STA_SSID_SET;
1978
1979 return 0;
1980 }
1981
1982 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
1983 {
1984 struct ieee80211_if_managed *ifmgd;
1985
1986 if (len > IEEE80211_MAX_SSID_LEN)
1987 return -EINVAL;
1988
1989 ifmgd = &sdata->u.mgd;
1990
1991 if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) {
1992 /*
1993 * Do not use reassociation if SSID is changed (different ESS).
1994 */
1995 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1996 memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid));
1997 memcpy(ifmgd->ssid, ssid, len);
1998 ifmgd->ssid_len = len;
1999 }
2000
2001 return ieee80211_sta_commit(sdata);
2002 }
2003
2004 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2005 {
2006 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2007 memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len);
2008 *len = ifmgd->ssid_len;
2009 return 0;
2010 }
2011
2012 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2013 {
2014 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2015
2016 if (is_valid_ether_addr(bssid)) {
2017 memcpy(ifmgd->bssid, bssid, ETH_ALEN);
2018 ifmgd->flags |= IEEE80211_STA_BSSID_SET;
2019 } else {
2020 memset(ifmgd->bssid, 0, ETH_ALEN);
2021 ifmgd->flags &= ~IEEE80211_STA_BSSID_SET;
2022 }
2023
2024 if (netif_running(sdata->dev)) {
2025 if (ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID)) {
2026 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2027 "the low-level driver\n", sdata->dev->name);
2028 }
2029 }
2030
2031 return ieee80211_sta_commit(sdata);
2032 }
2033
2034 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
2035 const char *ie, size_t len)
2036 {
2037 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2038
2039 kfree(ifmgd->extra_ie);
2040 if (len == 0) {
2041 ifmgd->extra_ie = NULL;
2042 ifmgd->extra_ie_len = 0;
2043 return 0;
2044 }
2045 ifmgd->extra_ie = kmalloc(len, GFP_KERNEL);
2046 if (!ifmgd->extra_ie) {
2047 ifmgd->extra_ie_len = 0;
2048 return -ENOMEM;
2049 }
2050 memcpy(ifmgd->extra_ie, ie, len);
2051 ifmgd->extra_ie_len = len;
2052 return 0;
2053 }
2054
2055 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2056 {
2057 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2058 sdata->dev->name, reason);
2059
2060 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2061 return -EINVAL;
2062
2063 ieee80211_set_disassoc(sdata, true, true, reason);
2064 return 0;
2065 }
2066
2067 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2068 {
2069 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2070
2071 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2072 sdata->dev->name, reason);
2073
2074 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2075 return -EINVAL;
2076
2077 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED))
2078 return -ENOLINK;
2079
2080 ieee80211_set_disassoc(sdata, false, true, reason);
2081 return 0;
2082 }
2083
2084 /* scan finished notification */
2085 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2086 {
2087 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2088
2089 /* Restart STA timers */
2090 rcu_read_lock();
2091 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2092 ieee80211_restart_sta_timer(sdata);
2093 rcu_read_unlock();
2094 }
2095
2096 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
2097 {
2098 struct ieee80211_local *local =
2099 container_of(work, struct ieee80211_local,
2100 dynamic_ps_disable_work);
2101
2102 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2103 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2104 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2105 }
2106
2107 ieee80211_wake_queues_by_reason(&local->hw,
2108 IEEE80211_QUEUE_STOP_REASON_PS);
2109 }
2110
2111 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
2112 {
2113 struct ieee80211_local *local =
2114 container_of(work, struct ieee80211_local,
2115 dynamic_ps_enable_work);
2116 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2117
2118 if (local->hw.conf.flags & IEEE80211_CONF_PS)
2119 return;
2120
2121 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
2122 ieee80211_send_nullfunc(local, sdata, 1);
2123
2124 local->hw.conf.flags |= IEEE80211_CONF_PS;
2125 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2126 }
2127
2128 void ieee80211_dynamic_ps_timer(unsigned long data)
2129 {
2130 struct ieee80211_local *local = (void *) data;
2131
2132 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
2133 }
2134
2135 void ieee80211_send_nullfunc(struct ieee80211_local *local,
2136 struct ieee80211_sub_if_data *sdata,
2137 int powersave)
2138 {
2139 struct sk_buff *skb;
2140 struct ieee80211_hdr *nullfunc;
2141 __le16 fc;
2142
2143 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2144 return;
2145
2146 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
2147 if (!skb) {
2148 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
2149 "frame\n", sdata->dev->name);
2150 return;
2151 }
2152 skb_reserve(skb, local->hw.extra_tx_headroom);
2153
2154 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
2155 memset(nullfunc, 0, 24);
2156 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
2157 IEEE80211_FCTL_TODS);
2158 if (powersave)
2159 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
2160 nullfunc->frame_control = fc;
2161 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2162 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
2163 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
2164
2165 ieee80211_tx_skb(sdata, skb, 0);
2166 }
Linux kernel - Deliverables
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