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>
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.
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/wireless.h>
19 #include <linux/random.h>
20 #include <linux/etherdevice.h>
21 #include <linux/rtnetlink.h>
22 #include <net/iw_handler.h>
23 #include <net/mac80211.h>
24 #include <asm/unaligned.h>
26 #include "ieee80211_i.h"
30 #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
31 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
32 #define IEEE80211_AUTH_MAX_TRIES 3
33 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
34 #define IEEE80211_ASSOC_MAX_TRIES 3
35 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
36 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
37 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
38 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
39 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
40 #define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
42 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
43 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
45 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
49 static int ecw2cw(int ecw)
51 return (1 << ecw) - 1;
54 static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
61 end = pos + bss->ies_len;
63 while (pos + 1 < end) {
64 if (pos + 2 + pos[1] > end)
74 static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
75 struct ieee80211_supported_band *sband,
81 for (i = 0; i < bss->supp_rates_len; i++) {
82 int rate = (bss->supp_rates[i] & 0x7F) * 5;
84 for (j = 0; j < sband->n_bitrates; j++)
85 if (sband->bitrates[j].bitrate == rate) {
95 /* also used by mesh code */
96 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
97 struct ieee802_11_elems *elems,
98 enum ieee80211_band band)
100 struct ieee80211_supported_band *sband;
101 struct ieee80211_rate *bitrates;
105 sband = local->hw.wiphy->bands[band];
109 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
112 bitrates = sband->bitrates;
113 num_rates = sband->n_bitrates;
115 for (i = 0; i < elems->supp_rates_len +
116 elems->ext_supp_rates_len; i++) {
119 if (i < elems->supp_rates_len)
120 rate = elems->supp_rates[i];
121 else if (elems->ext_supp_rates)
122 rate = elems->ext_supp_rates
123 [i - elems->supp_rates_len];
124 own_rate = 5 * (rate & 0x7f);
125 for (j = 0; j < num_rates; j++)
126 if (bitrates[j].bitrate == own_rate)
127 supp_rates |= BIT(j);
132 /* frame sending functions */
134 static void add_extra_ies(struct sk_buff *skb, u8 *ies, size_t ies_len)
137 memcpy(skb_put(skb, ies_len), ies, ies_len);
140 /* also used by scanning code */
141 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
142 u8 *ssid, size_t ssid_len)
144 struct ieee80211_local *local = sdata->local;
145 struct ieee80211_supported_band *sband;
147 struct ieee80211_mgmt *mgmt;
148 u8 *pos, *supp_rates, *esupp_rates = NULL;
151 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200 +
152 sdata->u.sta.ie_probereq_len);
154 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
155 "request\n", sdata->dev->name);
158 skb_reserve(skb, local->hw.extra_tx_headroom);
160 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
162 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
163 IEEE80211_STYPE_PROBE_REQ);
164 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
166 memcpy(mgmt->da, dst, ETH_ALEN);
167 memcpy(mgmt->bssid, dst, ETH_ALEN);
169 memset(mgmt->da, 0xff, ETH_ALEN);
170 memset(mgmt->bssid, 0xff, ETH_ALEN);
172 pos = skb_put(skb, 2 + ssid_len);
173 *pos++ = WLAN_EID_SSID;
175 memcpy(pos, ssid, ssid_len);
177 supp_rates = skb_put(skb, 2);
178 supp_rates[0] = WLAN_EID_SUPP_RATES;
180 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
182 for (i = 0; i < sband->n_bitrates; i++) {
183 struct ieee80211_rate *rate = &sband->bitrates[i];
185 pos = skb_put(skb, 1);
187 } else if (supp_rates[1] == 8) {
188 esupp_rates = skb_put(skb, 3);
189 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
191 pos = &esupp_rates[2];
193 pos = skb_put(skb, 1);
196 *pos = rate->bitrate / 5;
199 add_extra_ies(skb, sdata->u.sta.ie_probereq,
200 sdata->u.sta.ie_probereq_len);
202 ieee80211_tx_skb(sdata, skb, 0);
205 static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
206 struct ieee80211_if_sta *ifsta,
207 int transaction, u8 *extra, size_t extra_len,
210 struct ieee80211_local *local = sdata->local;
212 struct ieee80211_mgmt *mgmt;
214 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
215 sizeof(*mgmt) + 6 + extra_len +
216 sdata->u.sta.ie_auth_len);
218 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
219 "frame\n", sdata->dev->name);
222 skb_reserve(skb, local->hw.extra_tx_headroom);
224 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
225 memset(mgmt, 0, 24 + 6);
226 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
227 IEEE80211_STYPE_AUTH);
229 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
230 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
231 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
232 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
233 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
234 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
235 ifsta->auth_transaction = transaction + 1;
236 mgmt->u.auth.status_code = cpu_to_le16(0);
238 memcpy(skb_put(skb, extra_len), extra, extra_len);
239 add_extra_ies(skb, sdata->u.sta.ie_auth, sdata->u.sta.ie_auth_len);
241 ieee80211_tx_skb(sdata, skb, encrypt);
244 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
245 struct ieee80211_if_sta *ifsta)
247 struct ieee80211_local *local = sdata->local;
249 struct ieee80211_mgmt *mgmt;
250 u8 *pos, *ies, *ht_ie, *e_ies;
251 int i, len, count, rates_len, supp_rates_len;
253 struct ieee80211_bss *bss;
255 struct ieee80211_supported_band *sband;
259 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
260 e_ies = sdata->u.sta.ie_reassocreq;
261 e_ies_len = sdata->u.sta.ie_reassocreq_len;
263 e_ies = sdata->u.sta.ie_assocreq;
264 e_ies_len = sdata->u.sta.ie_assocreq_len;
267 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
268 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
269 ifsta->ssid_len + e_ies_len);
271 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
272 "frame\n", sdata->dev->name);
275 skb_reserve(skb, local->hw.extra_tx_headroom);
277 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
279 capab = ifsta->capab;
281 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
282 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
283 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
284 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
285 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
288 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
289 local->hw.conf.channel->center_freq,
290 ifsta->ssid, ifsta->ssid_len);
292 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
293 capab |= WLAN_CAPABILITY_PRIVACY;
297 /* get all rates supported by the device and the AP as
298 * some APs don't like getting a superset of their rates
299 * in the association request (e.g. D-Link DAP 1353 in
301 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
303 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
304 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
305 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
307 ieee80211_rx_bss_put(local, bss);
310 rates_len = sband->n_bitrates;
313 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
315 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
316 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
317 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
319 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
321 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
322 IEEE80211_STYPE_REASSOC_REQ);
323 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
324 mgmt->u.reassoc_req.listen_interval =
325 cpu_to_le16(local->hw.conf.listen_interval);
326 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
330 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
331 IEEE80211_STYPE_ASSOC_REQ);
332 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
333 mgmt->u.assoc_req.listen_interval =
334 cpu_to_le16(local->hw.conf.listen_interval);
338 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
339 *pos++ = WLAN_EID_SSID;
340 *pos++ = ifsta->ssid_len;
341 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
343 /* add all rates which were marked to be used above */
344 supp_rates_len = rates_len;
345 if (supp_rates_len > 8)
348 len = sband->n_bitrates;
349 pos = skb_put(skb, supp_rates_len + 2);
350 *pos++ = WLAN_EID_SUPP_RATES;
351 *pos++ = supp_rates_len;
354 for (i = 0; i < sband->n_bitrates; i++) {
355 if (BIT(i) & rates) {
356 int rate = sband->bitrates[i].bitrate;
357 *pos++ = (u8) (rate / 5);
363 if (rates_len > count) {
364 pos = skb_put(skb, rates_len - count + 2);
365 *pos++ = WLAN_EID_EXT_SUPP_RATES;
366 *pos++ = rates_len - count;
368 for (i++; i < sband->n_bitrates; i++) {
369 if (BIT(i) & rates) {
370 int rate = sband->bitrates[i].bitrate;
371 *pos++ = (u8) (rate / 5);
376 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
377 /* 1. power capabilities */
378 pos = skb_put(skb, 4);
379 *pos++ = WLAN_EID_PWR_CAPABILITY;
381 *pos++ = 0; /* min tx power */
382 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
384 /* 2. supported channels */
385 /* TODO: get this in reg domain format */
386 pos = skb_put(skb, 2 * sband->n_channels + 2);
387 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
388 *pos++ = 2 * sband->n_channels;
389 for (i = 0; i < sband->n_channels; i++) {
390 *pos++ = ieee80211_frequency_to_channel(
391 sband->channels[i].center_freq);
392 *pos++ = 1; /* one channel in the subband*/
396 if (ifsta->extra_ie) {
397 pos = skb_put(skb, ifsta->extra_ie_len);
398 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
401 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
402 pos = skb_put(skb, 9);
403 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
404 *pos++ = 7; /* len */
405 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
408 *pos++ = 2; /* WME */
409 *pos++ = 0; /* WME info */
410 *pos++ = 1; /* WME ver */
414 /* wmm support is a must to HT */
416 * IEEE802.11n does not allow TKIP/WEP as pairwise
417 * ciphers in HT mode. We still associate in non-ht
418 * mode (11a/b/g) if any one of these ciphers is
419 * configured as pairwise.
421 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
422 sband->ht_cap.ht_supported &&
423 (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) &&
424 ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
425 (!(ifsta->flags & IEEE80211_STA_TKIP_WEP_USED))) {
426 struct ieee80211_ht_info *ht_info =
427 (struct ieee80211_ht_info *)(ht_ie + 2);
428 u16 cap = sband->ht_cap.cap;
430 u32 flags = local->hw.conf.channel->flags;
432 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
433 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
434 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
435 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
436 cap &= ~IEEE80211_HT_CAP_SGI_40;
439 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
440 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
441 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
442 cap &= ~IEEE80211_HT_CAP_SGI_40;
447 tmp = cpu_to_le16(cap);
448 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
449 *pos++ = WLAN_EID_HT_CAPABILITY;
450 *pos++ = sizeof(struct ieee80211_ht_cap);
451 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
452 memcpy(pos, &tmp, sizeof(u16));
454 /* TODO: needs a define here for << 2 */
455 *pos++ = sband->ht_cap.ampdu_factor |
456 (sband->ht_cap.ampdu_density << 2);
457 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
460 add_extra_ies(skb, e_ies, e_ies_len);
462 kfree(ifsta->assocreq_ies);
463 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
464 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
465 if (ifsta->assocreq_ies)
466 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
468 ieee80211_tx_skb(sdata, skb, 0);
472 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
473 u16 stype, u16 reason)
475 struct ieee80211_local *local = sdata->local;
476 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
478 struct ieee80211_mgmt *mgmt;
482 if (stype == IEEE80211_STYPE_DEAUTH) {
483 ies = sdata->u.sta.ie_deauth;
484 ies_len = sdata->u.sta.ie_deauth_len;
486 ies = sdata->u.sta.ie_disassoc;
487 ies_len = sdata->u.sta.ie_disassoc_len;
490 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) +
493 printk(KERN_DEBUG "%s: failed to allocate buffer for "
494 "deauth/disassoc frame\n", sdata->dev->name);
497 skb_reserve(skb, local->hw.extra_tx_headroom);
499 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
501 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
502 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
503 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
504 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
506 /* u.deauth.reason_code == u.disassoc.reason_code */
507 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
509 add_extra_ies(skb, ies, ies_len);
511 ieee80211_tx_skb(sdata, skb, ifsta->flags & IEEE80211_STA_MFP_ENABLED);
515 static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
516 struct ieee80211_bss *bss)
518 struct ieee80211_local *local = sdata->local;
519 int i, have_higher_than_11mbit = 0;
521 /* cf. IEEE 802.11 9.2.12 */
522 for (i = 0; i < bss->supp_rates_len; i++)
523 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
524 have_higher_than_11mbit = 1;
526 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
527 have_higher_than_11mbit)
528 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
530 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
532 ieee80211_set_wmm_default(sdata);
535 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
536 struct ieee80211_if_sta *ifsta,
537 u8 *wmm_param, size_t wmm_param_len)
539 struct ieee80211_tx_queue_params params;
544 if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
550 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
552 count = wmm_param[6] & 0x0f;
553 if (count == ifsta->wmm_last_param_set)
555 ifsta->wmm_last_param_set = count;
558 left = wmm_param_len - 8;
560 memset(¶ms, 0, sizeof(params));
562 if (!local->ops->conf_tx)
566 for (; left >= 4; left -= 4, pos += 4) {
567 int aci = (pos[0] >> 5) & 0x03;
568 int acm = (pos[0] >> 4) & 0x01;
575 local->wmm_acm |= BIT(0) | BIT(3);
580 local->wmm_acm |= BIT(4) | BIT(5);
585 local->wmm_acm |= BIT(6) | BIT(7);
591 local->wmm_acm |= BIT(1) | BIT(2);
595 params.aifs = pos[0] & 0x0f;
596 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
597 params.cw_min = ecw2cw(pos[1] & 0x0f);
598 params.txop = get_unaligned_le16(pos + 2);
599 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
600 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
601 "cWmin=%d cWmax=%d txop=%d\n",
602 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
603 params.cw_max, params.txop);
605 /* TODO: handle ACM (block TX, fallback to next lowest allowed
607 if (local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) {
608 printk(KERN_DEBUG "%s: failed to set TX queue "
609 "parameters for queue %d\n", local->mdev->name, queue);
614 static bool check_tim(struct ieee802_11_elems *elems, u16 aid, bool *is_mc)
617 u8 index, indexn1, indexn2;
618 struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *) elems->tim;
622 mask = 1 << (aid & 7);
624 if (tim->bitmap_ctrl & 0x01)
627 indexn1 = tim->bitmap_ctrl & 0xfe;
628 indexn2 = elems->tim_len + indexn1 - 4;
630 if (index < indexn1 || index > indexn2)
635 return !!(tim->virtual_map[index] & mask);
638 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
639 u16 capab, bool erp_valid, u8 erp)
641 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
642 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
643 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
647 bool use_short_preamble;
651 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
652 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
654 use_protection = false;
655 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
658 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
660 if (use_protection != bss_conf->use_cts_prot) {
661 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
662 if (net_ratelimit()) {
663 printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
665 use_protection ? "enabled" : "disabled",
669 bss_conf->use_cts_prot = use_protection;
670 changed |= BSS_CHANGED_ERP_CTS_PROT;
673 if (use_short_preamble != bss_conf->use_short_preamble) {
674 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
675 if (net_ratelimit()) {
676 printk(KERN_DEBUG "%s: switched to %s barker preamble"
679 use_short_preamble ? "short" : "long",
683 bss_conf->use_short_preamble = use_short_preamble;
684 changed |= BSS_CHANGED_ERP_PREAMBLE;
687 if (use_short_slot != bss_conf->use_short_slot) {
688 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
689 if (net_ratelimit()) {
690 printk(KERN_DEBUG "%s: switched to %s slot time"
693 use_short_slot ? "short" : "long",
697 bss_conf->use_short_slot = use_short_slot;
698 changed |= BSS_CHANGED_ERP_SLOT;
704 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata,
705 struct ieee80211_if_sta *ifsta)
707 union iwreq_data wrqu;
708 memset(&wrqu, 0, sizeof(wrqu));
709 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
710 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
711 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
712 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
715 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata,
716 struct ieee80211_if_sta *ifsta)
721 union iwreq_data wrqu;
723 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
726 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
727 ifsta->assocresp_ies_len), GFP_KERNEL);
731 len = sprintf(buf, "ASSOCINFO(");
732 if (ifsta->assocreq_ies) {
733 len += sprintf(buf + len, "ReqIEs=");
734 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
735 len += sprintf(buf + len, "%02x",
736 ifsta->assocreq_ies[i]);
739 if (ifsta->assocresp_ies) {
740 if (ifsta->assocreq_ies)
741 len += sprintf(buf + len, " ");
742 len += sprintf(buf + len, "RespIEs=");
743 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
744 len += sprintf(buf + len, "%02x",
745 ifsta->assocresp_ies[i]);
748 len += sprintf(buf + len, ")");
750 if (len > IW_CUSTOM_MAX) {
751 len = sprintf(buf, "ASSOCRESPIE=");
752 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
753 len += sprintf(buf + len, "%02x",
754 ifsta->assocresp_ies[i]);
758 if (len <= IW_CUSTOM_MAX) {
759 memset(&wrqu, 0, sizeof(wrqu));
760 wrqu.data.length = len;
761 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
768 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
769 struct ieee80211_if_sta *ifsta,
770 u32 bss_info_changed)
772 struct ieee80211_local *local = sdata->local;
773 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
775 struct ieee80211_bss *bss;
777 bss_info_changed |= BSS_CHANGED_ASSOC;
778 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
780 if (sdata->vif.type != NL80211_IFTYPE_STATION)
783 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
784 conf->channel->center_freq,
785 ifsta->ssid, ifsta->ssid_len);
787 /* set timing information */
788 sdata->vif.bss_conf.beacon_int = bss->beacon_int;
789 sdata->vif.bss_conf.timestamp = bss->timestamp;
790 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
792 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
793 bss->capability, bss->has_erp_value, bss->erp_value);
795 ieee80211_rx_bss_put(local, bss);
798 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
799 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
800 ieee80211_sta_send_associnfo(sdata, ifsta);
802 ifsta->last_probe = jiffies;
803 ieee80211_led_assoc(local, 1);
805 sdata->vif.bss_conf.assoc = 1;
807 * For now just always ask the driver to update the basic rateset
808 * when we have associated, we aren't checking whether it actually
811 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
812 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
814 if (local->powersave) {
815 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) &&
816 local->hw.conf.dynamic_ps_timeout > 0) {
817 mod_timer(&local->dynamic_ps_timer, jiffies +
819 local->hw.conf.dynamic_ps_timeout));
821 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
822 ieee80211_send_nullfunc(local, sdata, 1);
823 conf->flags |= IEEE80211_CONF_PS;
824 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
828 netif_tx_start_all_queues(sdata->dev);
829 netif_carrier_on(sdata->dev);
831 ieee80211_sta_send_apinfo(sdata, ifsta);
834 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
835 struct ieee80211_if_sta *ifsta)
837 ifsta->direct_probe_tries++;
838 if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
839 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
840 sdata->dev->name, ifsta->bssid);
841 ifsta->state = IEEE80211_STA_MLME_DISABLED;
842 ieee80211_sta_send_apinfo(sdata, ifsta);
846 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
847 sdata->dev->name, ifsta->bssid,
848 ifsta->direct_probe_tries);
850 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
852 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request);
854 /* Direct probe is sent to broadcast address as some APs
855 * will not answer to direct packet in unassociated state.
857 ieee80211_send_probe_req(sdata, NULL,
858 ifsta->ssid, ifsta->ssid_len);
860 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
864 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
865 struct ieee80211_if_sta *ifsta)
868 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
869 printk(KERN_DEBUG "%s: authentication with AP %pM"
871 sdata->dev->name, ifsta->bssid);
872 ifsta->state = IEEE80211_STA_MLME_DISABLED;
873 ieee80211_sta_send_apinfo(sdata, ifsta);
877 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
878 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
879 sdata->dev->name, ifsta->bssid);
881 ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
883 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
887 * The disassoc 'reason' argument can be either our own reason
888 * if self disconnected or a reason code from the AP.
890 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
891 struct ieee80211_if_sta *ifsta, bool deauth,
892 bool self_disconnected, u16 reason)
894 struct ieee80211_local *local = sdata->local;
895 struct sta_info *sta;
896 u32 changed = 0, config_changed = 0;
900 sta = sta_info_get(local, ifsta->bssid);
907 ifsta->direct_probe_tries = 0;
908 ifsta->auth_tries = 0;
910 ifsta->assoc_scan_tries = 0;
911 ifsta->assoc_tries = 0;
913 netif_tx_stop_all_queues(sdata->dev);
914 netif_carrier_off(sdata->dev);
916 ieee80211_sta_tear_down_BA_sessions(sdata, sta->sta.addr);
918 if (self_disconnected) {
920 ieee80211_send_deauth_disassoc(sdata,
921 IEEE80211_STYPE_DEAUTH, reason);
923 ieee80211_send_deauth_disassoc(sdata,
924 IEEE80211_STYPE_DISASSOC, reason);
927 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
928 changed |= ieee80211_reset_erp_info(sdata);
930 ieee80211_led_assoc(local, 0);
931 changed |= BSS_CHANGED_ASSOC;
932 sdata->vif.bss_conf.assoc = false;
934 ieee80211_sta_send_apinfo(sdata, ifsta);
936 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT)
937 ifsta->state = IEEE80211_STA_MLME_DISABLED;
941 /* channel(_type) changes are handled by ieee80211_hw_config */
942 local->oper_channel_type = NL80211_CHAN_NO_HT;
944 local->power_constr_level = 0;
946 del_timer_sync(&local->dynamic_ps_timer);
947 cancel_work_sync(&local->dynamic_ps_enable_work);
949 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
950 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
951 config_changed |= IEEE80211_CONF_CHANGE_PS;
954 ieee80211_hw_config(local, config_changed);
955 ieee80211_bss_info_change_notify(sdata, changed);
959 sta = sta_info_get(local, ifsta->bssid);
965 sta_info_unlink(&sta);
969 sta_info_destroy(sta);
972 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
974 if (!sdata || !sdata->default_key ||
975 sdata->default_key->conf.alg != ALG_WEP)
980 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
981 struct ieee80211_if_sta *ifsta)
983 struct ieee80211_local *local = sdata->local;
984 struct ieee80211_bss *bss;
989 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
992 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
993 local->hw.conf.channel->center_freq,
994 ifsta->ssid, ifsta->ssid_len);
998 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
999 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
1000 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
1002 ieee80211_rx_bss_put(local, bss);
1004 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
1010 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
1011 struct ieee80211_if_sta *ifsta)
1013 ifsta->assoc_tries++;
1014 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
1015 printk(KERN_DEBUG "%s: association with AP %pM"
1017 sdata->dev->name, ifsta->bssid);
1018 ifsta->state = IEEE80211_STA_MLME_DISABLED;
1019 ieee80211_sta_send_apinfo(sdata, ifsta);
1023 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
1024 printk(KERN_DEBUG "%s: associate with AP %pM\n",
1025 sdata->dev->name, ifsta->bssid);
1026 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
1027 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
1028 "mixed-cell disabled - abort association\n", sdata->dev->name);
1029 ifsta->state = IEEE80211_STA_MLME_DISABLED;
1033 ieee80211_send_assoc(sdata, ifsta);
1035 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1039 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
1040 struct ieee80211_if_sta *ifsta)
1042 struct ieee80211_local *local = sdata->local;
1043 struct sta_info *sta;
1045 bool remove_bss = false;
1047 /* TODO: start monitoring current AP signal quality and number of
1048 * missed beacons. Scan other channels every now and then and search
1049 * for better APs. */
1050 /* TODO: remove expired BSSes */
1052 ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
1056 sta = sta_info_get(local, ifsta->bssid);
1058 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
1059 sdata->dev->name, ifsta->bssid);
1063 if (time_after(jiffies,
1064 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
1065 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
1066 printk(KERN_DEBUG "%s: No ProbeResp from "
1067 "current AP %pM - assume out of "
1069 sdata->dev->name, ifsta->bssid);
1073 ieee80211_send_probe_req(sdata, ifsta->bssid,
1076 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
1078 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1079 if (time_after(jiffies, ifsta->last_probe +
1080 IEEE80211_PROBE_INTERVAL)) {
1081 ifsta->last_probe = jiffies;
1082 ieee80211_send_probe_req(sdata, ifsta->bssid,
1092 ieee80211_set_disassoc(sdata, ifsta, true, true,
1093 WLAN_REASON_PREV_AUTH_NOT_VALID);
1095 struct ieee80211_bss *bss;
1097 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
1098 local->hw.conf.channel->center_freq,
1099 ifsta->ssid, ifsta->ssid_len);
1101 atomic_dec(&bss->users);
1102 ieee80211_rx_bss_put(local, bss);
1106 mod_timer(&ifsta->timer, jiffies +
1107 IEEE80211_MONITORING_INTERVAL);
1112 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
1113 struct ieee80211_if_sta *ifsta)
1115 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1116 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1117 ieee80211_associate(sdata, ifsta);
1121 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1122 struct ieee80211_if_sta *ifsta,
1123 struct ieee80211_mgmt *mgmt,
1127 struct ieee802_11_elems elems;
1129 pos = mgmt->u.auth.variable;
1130 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1131 if (!elems.challenge)
1133 ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
1134 elems.challenge_len + 2, 1);
1137 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1138 struct ieee80211_if_sta *ifsta,
1139 struct ieee80211_mgmt *mgmt,
1142 u16 auth_alg, auth_transaction, status_code;
1144 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
1145 sdata->vif.type != NL80211_IFTYPE_ADHOC)
1151 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
1152 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1155 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
1156 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1159 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1160 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1161 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1163 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
1165 * IEEE 802.11 standard does not require authentication in IBSS
1166 * networks and most implementations do not seem to use it.
1167 * However, try to reply to authentication attempts if someone
1168 * has actually implemented this.
1170 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
1172 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
1175 if (auth_alg != ifsta->auth_alg ||
1176 auth_transaction != ifsta->auth_transaction)
1179 if (status_code != WLAN_STATUS_SUCCESS) {
1180 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1182 const int num_algs = ARRAY_SIZE(algs);
1184 algs[0] = algs[1] = algs[2] = 0xff;
1185 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1186 algs[0] = WLAN_AUTH_OPEN;
1187 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1188 algs[1] = WLAN_AUTH_SHARED_KEY;
1189 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1190 algs[2] = WLAN_AUTH_LEAP;
1191 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1193 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1197 for (i = 0; i < num_algs; i++) {
1199 if (pos >= num_algs)
1201 if (algs[pos] == ifsta->auth_alg ||
1204 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1205 !ieee80211_sta_wep_configured(sdata))
1207 ifsta->auth_alg = algs[pos];
1214 switch (ifsta->auth_alg) {
1215 case WLAN_AUTH_OPEN:
1216 case WLAN_AUTH_LEAP:
1217 ieee80211_auth_completed(sdata, ifsta);
1219 case WLAN_AUTH_SHARED_KEY:
1220 if (ifsta->auth_transaction == 4)
1221 ieee80211_auth_completed(sdata, ifsta);
1223 ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
1229 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1230 struct ieee80211_if_sta *ifsta,
1231 struct ieee80211_mgmt *mgmt,
1239 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1242 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1244 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
1245 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1246 sdata->dev->name, reason_code);
1248 if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1249 ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
1250 ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1251 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1252 mod_timer(&ifsta->timer, jiffies +
1253 IEEE80211_RETRY_AUTH_INTERVAL);
1256 ieee80211_set_disassoc(sdata, ifsta, true, false, 0);
1257 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1261 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1262 struct ieee80211_if_sta *ifsta,
1263 struct ieee80211_mgmt *mgmt,
1271 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1274 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1276 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1277 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1278 sdata->dev->name, reason_code);
1280 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1281 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
1282 mod_timer(&ifsta->timer, jiffies +
1283 IEEE80211_RETRY_AUTH_INTERVAL);
1286 ieee80211_set_disassoc(sdata, ifsta, false, false, reason_code);
1290 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1291 struct ieee80211_if_sta *ifsta,
1292 struct ieee80211_mgmt *mgmt,
1296 struct ieee80211_local *local = sdata->local;
1297 struct ieee80211_supported_band *sband;
1298 struct sta_info *sta;
1299 u32 rates, basic_rates;
1300 u16 capab_info, status_code, aid;
1301 struct ieee802_11_elems elems;
1302 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1306 bool have_higher_than_11mbit = false, newsta = false;
1307 u16 ap_ht_cap_flags;
1309 /* AssocResp and ReassocResp have identical structure, so process both
1310 * of them in this function. */
1312 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
1318 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1321 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1322 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1323 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1325 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1326 "status=%d aid=%d)\n",
1327 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1328 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1330 pos = mgmt->u.assoc_resp.variable;
1331 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1333 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1334 elems.timeout_int && elems.timeout_int_len == 5 &&
1335 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1337 tu = get_unaligned_le32(elems.timeout_int + 1);
1338 ms = tu * 1024 / 1000;
1339 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1340 "comeback duration %u TU (%u ms)\n",
1341 sdata->dev->name, tu, ms);
1342 if (ms > IEEE80211_ASSOC_TIMEOUT)
1343 mod_timer(&ifsta->timer,
1344 jiffies + msecs_to_jiffies(ms));
1348 if (status_code != WLAN_STATUS_SUCCESS) {
1349 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1350 sdata->dev->name, status_code);
1351 /* if this was a reassociation, ensure we try a "full"
1352 * association next time. This works around some broken APs
1353 * which do not correctly reject reassociation requests. */
1354 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1358 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1359 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1360 "set\n", sdata->dev->name, aid);
1361 aid &= ~(BIT(15) | BIT(14));
1363 if (!elems.supp_rates) {
1364 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1369 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1371 ifsta->ap_capab = capab_info;
1373 kfree(ifsta->assocresp_ies);
1374 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1375 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1376 if (ifsta->assocresp_ies)
1377 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1381 /* Add STA entry for the AP */
1382 sta = sta_info_get(local, ifsta->bssid);
1384 struct ieee80211_bss *bss;
1388 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1390 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1391 " the AP\n", sdata->dev->name);
1395 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
1396 local->hw.conf.channel->center_freq,
1397 ifsta->ssid, ifsta->ssid_len);
1399 sta->last_signal = bss->signal;
1400 sta->last_qual = bss->qual;
1401 sta->last_noise = bss->noise;
1402 ieee80211_rx_bss_put(local, bss);
1405 /* update new sta with its last rx activity */
1406 sta->last_rx = jiffies;
1410 * FIXME: Do we really need to update the sta_info's information here?
1411 * We already know about the AP (we found it in our list) so it
1412 * should already be filled with the right info, no?
1413 * As is stands, all this is racy because typically we assume
1414 * the information that is filled in here (except flags) doesn't
1415 * change while a STA structure is alive. As such, it should move
1416 * to between the sta_info_alloc() and sta_info_insert() above.
1419 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1420 WLAN_STA_AUTHORIZED);
1424 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1426 for (i = 0; i < elems.supp_rates_len; i++) {
1427 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1428 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1431 have_higher_than_11mbit = true;
1433 for (j = 0; j < sband->n_bitrates; j++) {
1434 if (sband->bitrates[j].bitrate == rate) {
1437 basic_rates |= BIT(j);
1443 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1444 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1445 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1448 have_higher_than_11mbit = true;
1450 for (j = 0; j < sband->n_bitrates; j++) {
1451 if (sband->bitrates[j].bitrate == rate) {
1454 basic_rates |= BIT(j);
1460 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1461 sdata->vif.bss_conf.basic_rates = basic_rates;
1463 /* cf. IEEE 802.11 9.2.12 */
1464 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1465 have_higher_than_11mbit)
1466 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1468 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1470 if (elems.ht_cap_elem)
1471 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1472 elems.ht_cap_elem, &sta->sta.ht_cap);
1474 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1476 rate_control_rate_init(sta);
1478 if (ifsta->flags & IEEE80211_STA_MFP_ENABLED)
1479 set_sta_flags(sta, WLAN_STA_MFP);
1481 if (elems.wmm_param)
1482 set_sta_flags(sta, WLAN_STA_WME);
1485 int err = sta_info_insert(sta);
1487 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1488 " the AP (error %d)\n", sdata->dev->name, err);
1496 if (elems.wmm_param)
1497 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1498 elems.wmm_param_len);
1500 if (elems.ht_info_elem && elems.wmm_param &&
1501 (ifsta->flags & IEEE80211_STA_WMM_ENABLED))
1502 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1505 /* set AID and assoc capability,
1506 * ieee80211_set_associated() will tell the driver */
1507 bss_conf->aid = aid;
1508 bss_conf->assoc_capability = capab_info;
1509 ieee80211_set_associated(sdata, ifsta, changed);
1511 ieee80211_associated(sdata, ifsta);
1515 static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
1516 struct ieee80211_if_sta *ifsta,
1517 struct ieee80211_bss *bss)
1519 struct ieee80211_local *local = sdata->local;
1520 int res = 0, rates, i, j;
1521 struct sk_buff *skb;
1522 struct ieee80211_mgmt *mgmt;
1524 struct ieee80211_supported_band *sband;
1525 union iwreq_data wrqu;
1527 if (local->ops->reset_tsf) {
1528 /* Reset own TSF to allow time synchronization work. */
1529 local->ops->reset_tsf(local_to_hw(local));
1532 if ((ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) &&
1533 memcmp(ifsta->bssid, bss->bssid, ETH_ALEN) == 0)
1536 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400 +
1537 sdata->u.sta.ie_proberesp_len);
1539 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1540 "response\n", sdata->dev->name);
1544 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1546 if (!(ifsta->flags & IEEE80211_STA_PREV_BSSID_SET)) {
1547 /* Remove possible STA entries from other IBSS networks. */
1548 sta_info_flush_delayed(sdata);
1551 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
1552 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
1556 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
1558 sdata->drop_unencrypted = bss->capability &
1559 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
1561 res = ieee80211_set_freq(sdata, bss->freq);
1566 /* Build IBSS probe response */
1568 skb_reserve(skb, local->hw.extra_tx_headroom);
1570 mgmt = (struct ieee80211_mgmt *)
1571 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
1572 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
1573 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1574 IEEE80211_STYPE_PROBE_RESP);
1575 memset(mgmt->da, 0xff, ETH_ALEN);
1576 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1577 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1578 mgmt->u.beacon.beacon_int =
1579 cpu_to_le16(local->hw.conf.beacon_int);
1580 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
1581 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
1583 pos = skb_put(skb, 2 + ifsta->ssid_len);
1584 *pos++ = WLAN_EID_SSID;
1585 *pos++ = ifsta->ssid_len;
1586 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
1588 rates = bss->supp_rates_len;
1591 pos = skb_put(skb, 2 + rates);
1592 *pos++ = WLAN_EID_SUPP_RATES;
1594 memcpy(pos, bss->supp_rates, rates);
1596 if (bss->band == IEEE80211_BAND_2GHZ) {
1597 pos = skb_put(skb, 2 + 1);
1598 *pos++ = WLAN_EID_DS_PARAMS;
1600 *pos++ = ieee80211_frequency_to_channel(bss->freq);
1603 pos = skb_put(skb, 2 + 2);
1604 *pos++ = WLAN_EID_IBSS_PARAMS;
1606 /* FIX: set ATIM window based on scan results */
1610 if (bss->supp_rates_len > 8) {
1611 rates = bss->supp_rates_len - 8;
1612 pos = skb_put(skb, 2 + rates);
1613 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1615 memcpy(pos, &bss->supp_rates[8], rates);
1618 add_extra_ies(skb, sdata->u.sta.ie_proberesp,
1619 sdata->u.sta.ie_proberesp_len);
1621 ifsta->probe_resp = skb;
1623 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON |
1624 IEEE80211_IFCC_BEACON_ENABLED);
1628 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1629 for (i = 0; i < bss->supp_rates_len; i++) {
1630 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
1631 for (j = 0; j < sband->n_bitrates; j++)
1632 if (sband->bitrates[j].bitrate == bitrate)
1635 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
1637 ieee80211_sta_def_wmm_params(sdata, bss);
1639 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
1640 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
1641 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1643 ieee80211_led_assoc(local, true);
1645 memset(&wrqu, 0, sizeof(wrqu));
1646 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
1647 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
1652 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1653 struct ieee80211_mgmt *mgmt,
1655 struct ieee80211_rx_status *rx_status,
1656 struct ieee802_11_elems *elems,
1659 struct ieee80211_local *local = sdata->local;
1661 struct ieee80211_bss *bss;
1662 struct sta_info *sta;
1663 struct ieee80211_channel *channel;
1664 u64 beacon_timestamp, rx_timestamp;
1666 enum ieee80211_band band = rx_status->band;
1668 if (elems->ds_params && elems->ds_params_len == 1)
1669 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1671 freq = rx_status->freq;
1673 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1675 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1678 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && elems->supp_rates &&
1679 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1680 supp_rates = ieee80211_sta_get_rates(local, elems, band);
1684 sta = sta_info_get(local, mgmt->sa);
1688 prev_rates = sta->sta.supp_rates[band];
1689 /* make sure mandatory rates are always added */
1690 sta->sta.supp_rates[band] = supp_rates |
1691 ieee80211_mandatory_rates(local, band);
1693 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1694 if (sta->sta.supp_rates[band] != prev_rates)
1695 printk(KERN_DEBUG "%s: updated supp_rates set "
1696 "for %pM based on beacon info (0x%llx | "
1697 "0x%llx -> 0x%llx)\n",
1700 (unsigned long long) prev_rates,
1701 (unsigned long long) supp_rates,
1702 (unsigned long long) sta->sta.supp_rates[band]);
1705 ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates);
1711 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1716 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1717 (memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0)) {
1718 struct ieee80211_channel_sw_ie *sw_elem =
1719 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1720 ieee80211_process_chanswitch(sdata, sw_elem, bss);
1723 /* was just updated in ieee80211_bss_info_update */
1724 beacon_timestamp = bss->timestamp;
1727 * In STA mode, the remaining parameters should not be overridden
1728 * by beacons because they're not necessarily accurate there.
1730 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
1731 bss->last_probe_resp && beacon) {
1732 ieee80211_rx_bss_put(local, bss);
1736 /* check if we need to merge IBSS */
1737 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && beacon &&
1738 (!(sdata->u.sta.flags & IEEE80211_STA_BSSID_SET)) &&
1739 bss->capability & WLAN_CAPABILITY_IBSS &&
1740 bss->freq == local->oper_channel->center_freq &&
1741 elems->ssid_len == sdata->u.sta.ssid_len &&
1742 memcmp(elems->ssid, sdata->u.sta.ssid,
1743 sdata->u.sta.ssid_len) == 0) {
1744 if (rx_status->flag & RX_FLAG_TSFT) {
1745 /* in order for correct IBSS merging we need mactime
1747 * since mactime is defined as the time the first data
1748 * symbol of the frame hits the PHY, and the timestamp
1749 * of the beacon is defined as "the time that the data
1750 * symbol containing the first bit of the timestamp is
1751 * transmitted to the PHY plus the transmitting STA’s
1752 * delays through its local PHY from the MAC-PHY
1753 * interface to its interface with the WM"
1754 * (802.11 11.1.2) - equals the time this bit arrives at
1755 * the receiver - we have to take into account the
1756 * offset between the two.
1757 * e.g: at 1 MBit that means mactime is 192 usec earlier
1758 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
1761 if (rx_status->flag & RX_FLAG_HT) {
1762 rate = 65; /* TODO: HT rates */
1764 rate = local->hw.wiphy->bands[band]->
1765 bitrates[rx_status->rate_idx].bitrate;
1767 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
1768 } else if (local && local->ops && local->ops->get_tsf)
1769 /* second best option: get current TSF */
1770 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
1772 /* can't merge without knowing the TSF */
1773 rx_timestamp = -1LLU;
1774 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1775 printk(KERN_DEBUG "RX beacon SA=%pM BSSID="
1776 "%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
1777 mgmt->sa, mgmt->bssid,
1778 (unsigned long long)rx_timestamp,
1779 (unsigned long long)beacon_timestamp,
1780 (unsigned long long)(rx_timestamp - beacon_timestamp),
1782 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1783 if (beacon_timestamp > rx_timestamp) {
1784 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1785 printk(KERN_DEBUG "%s: beacon TSF higher than "
1786 "local TSF - IBSS merge with BSSID %pM\n",
1787 sdata->dev->name, mgmt->bssid);
1789 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
1790 ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates);
1794 ieee80211_rx_bss_put(local, bss);
1798 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1799 struct ieee80211_mgmt *mgmt,
1801 struct ieee80211_rx_status *rx_status)
1804 struct ieee802_11_elems elems;
1805 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1807 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1808 return; /* ignore ProbeResp to foreign address */
1810 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1814 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1817 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1819 /* direct probe may be part of the association flow */
1820 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1822 printk(KERN_DEBUG "%s direct probe responded\n",
1824 ieee80211_authenticate(sdata, ifsta);
1829 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1830 struct ieee80211_mgmt *mgmt,
1832 struct ieee80211_rx_status *rx_status)
1834 struct ieee80211_if_sta *ifsta;
1836 struct ieee802_11_elems elems;
1837 struct ieee80211_local *local = sdata->local;
1839 bool erp_valid, directed_tim, is_mc = false;
1842 /* Process beacon from the current BSS */
1843 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1847 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1849 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
1851 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1853 ifsta = &sdata->u.sta;
1855 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
1856 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1859 if (rx_status->freq != local->hw.conf.channel->center_freq)
1862 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1863 elems.wmm_param_len);
1865 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK &&
1866 local->hw.conf.flags & IEEE80211_CONF_PS) {
1867 directed_tim = check_tim(&elems, ifsta->aid, &is_mc);
1869 if (directed_tim || is_mc) {
1870 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1871 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1872 ieee80211_send_nullfunc(local, sdata, 0);
1876 if (elems.erp_info && elems.erp_info_len >= 1) {
1878 erp_value = elems.erp_info[0];
1882 changed |= ieee80211_handle_bss_capability(sdata,
1883 le16_to_cpu(mgmt->u.beacon.capab_info),
1884 erp_valid, erp_value);
1887 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param) {
1888 struct sta_info *sta;
1889 struct ieee80211_supported_band *sband;
1890 u16 ap_ht_cap_flags;
1894 sta = sta_info_get(local, ifsta->bssid);
1900 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1902 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1903 elems.ht_cap_elem, &sta->sta.ht_cap);
1905 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1909 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1913 if (elems.country_elem) {
1914 /* Note we are only reviewing this on beacons
1915 * for the BSSID we are associated to */
1916 regulatory_hint_11d(local->hw.wiphy,
1917 elems.country_elem, elems.country_elem_len);
1919 /* TODO: IBSS also needs this */
1920 if (elems.pwr_constr_elem)
1921 ieee80211_handle_pwr_constr(sdata,
1922 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1923 elems.pwr_constr_elem,
1924 elems.pwr_constr_elem_len);
1927 ieee80211_bss_info_change_notify(sdata, changed);
1931 static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
1932 struct ieee80211_if_sta *ifsta,
1933 struct ieee80211_mgmt *mgmt,
1936 struct ieee80211_local *local = sdata->local;
1938 struct sk_buff *skb;
1939 struct ieee80211_mgmt *resp;
1942 if (sdata->vif.type != NL80211_IFTYPE_ADHOC ||
1943 ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
1944 len < 24 + 2 || !ifsta->probe_resp)
1947 if (local->ops->tx_last_beacon)
1948 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1952 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1953 printk(KERN_DEBUG "%s: RX ProbeReq SA=%pM DA=%pM BSSID=%pM"
1954 " (tx_last_beacon=%d)\n",
1955 sdata->dev->name, mgmt->sa, mgmt->da,
1956 mgmt->bssid, tx_last_beacon);
1957 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1959 if (!tx_last_beacon)
1962 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1963 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1966 end = ((u8 *) mgmt) + len;
1967 pos = mgmt->u.probe_req.variable;
1968 if (pos[0] != WLAN_EID_SSID ||
1969 pos + 2 + pos[1] > end) {
1970 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1971 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
1973 sdata->dev->name, mgmt->sa);
1978 (pos[1] != ifsta->ssid_len ||
1979 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1980 /* Ignore ProbeReq for foreign SSID */
1984 /* Reply with ProbeResp */
1985 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
1989 resp = (struct ieee80211_mgmt *) skb->data;
1990 memcpy(resp->da, mgmt->sa, ETH_ALEN);
1991 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1992 printk(KERN_DEBUG "%s: Sending ProbeResp to %pM\n",
1993 sdata->dev->name, resp->da);
1994 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1995 ieee80211_tx_skb(sdata, skb, 0);
1998 void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
1999 struct ieee80211_rx_status *rx_status)
2001 struct ieee80211_local *local = sdata->local;
2002 struct ieee80211_if_sta *ifsta;
2003 struct ieee80211_mgmt *mgmt;
2009 ifsta = &sdata->u.sta;
2011 mgmt = (struct ieee80211_mgmt *) skb->data;
2012 fc = le16_to_cpu(mgmt->frame_control);
2014 switch (fc & IEEE80211_FCTL_STYPE) {
2015 case IEEE80211_STYPE_PROBE_REQ:
2016 case IEEE80211_STYPE_PROBE_RESP:
2017 case IEEE80211_STYPE_BEACON:
2018 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2019 case IEEE80211_STYPE_AUTH:
2020 case IEEE80211_STYPE_ASSOC_RESP:
2021 case IEEE80211_STYPE_REASSOC_RESP:
2022 case IEEE80211_STYPE_DEAUTH:
2023 case IEEE80211_STYPE_DISASSOC:
2024 skb_queue_tail(&ifsta->skb_queue, skb);
2025 queue_work(local->hw.workqueue, &ifsta->work);
2033 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2034 struct sk_buff *skb)
2036 struct ieee80211_rx_status *rx_status;
2037 struct ieee80211_if_sta *ifsta;
2038 struct ieee80211_mgmt *mgmt;
2041 ifsta = &sdata->u.sta;
2043 rx_status = (struct ieee80211_rx_status *) skb->cb;
2044 mgmt = (struct ieee80211_mgmt *) skb->data;
2045 fc = le16_to_cpu(mgmt->frame_control);
2047 switch (fc & IEEE80211_FCTL_STYPE) {
2048 case IEEE80211_STYPE_PROBE_REQ:
2049 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len);
2051 case IEEE80211_STYPE_PROBE_RESP:
2052 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
2054 case IEEE80211_STYPE_BEACON:
2055 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2057 case IEEE80211_STYPE_AUTH:
2058 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
2060 case IEEE80211_STYPE_ASSOC_RESP:
2061 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
2063 case IEEE80211_STYPE_REASSOC_RESP:
2064 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
2066 case IEEE80211_STYPE_DEAUTH:
2067 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
2069 case IEEE80211_STYPE_DISASSOC:
2070 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
2078 static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
2080 struct ieee80211_local *local = sdata->local;
2082 struct sta_info *sta;
2086 list_for_each_entry_rcu(sta, &local->sta_list, list) {
2087 if (sta->sdata == sdata &&
2088 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2101 static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
2102 struct ieee80211_if_sta *ifsta)
2104 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2106 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
2107 if (ieee80211_sta_active_ibss(sdata))
2110 if ((sdata->u.sta.flags & IEEE80211_STA_BSSID_SET) &&
2111 (!(sdata->u.sta.flags & IEEE80211_STA_AUTO_CHANNEL_SEL)))
2114 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
2115 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
2116 ieee80211_request_scan(sdata, ifsta->ssid, ifsta->ssid_len);
2120 static void ieee80211_sta_timer(unsigned long data)
2122 struct ieee80211_sub_if_data *sdata =
2123 (struct ieee80211_sub_if_data *) data;
2124 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2125 struct ieee80211_local *local = sdata->local;
2127 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2128 queue_work(local->hw.workqueue, &ifsta->work);
2131 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
2132 struct ieee80211_if_sta *ifsta)
2134 struct ieee80211_local *local = sdata->local;
2136 if (local->ops->reset_tsf) {
2137 /* Reset own TSF to allow time synchronization work. */
2138 local->ops->reset_tsf(local_to_hw(local));
2141 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2144 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2145 ifsta->auth_alg = WLAN_AUTH_OPEN;
2146 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2147 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2148 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2149 ifsta->auth_alg = WLAN_AUTH_LEAP;
2151 ifsta->auth_alg = WLAN_AUTH_OPEN;
2152 ifsta->auth_transaction = -1;
2153 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
2154 ifsta->assoc_scan_tries = 0;
2155 ifsta->direct_probe_tries = 0;
2156 ifsta->auth_tries = 0;
2157 ifsta->assoc_tries = 0;
2158 netif_tx_stop_all_queues(sdata->dev);
2159 netif_carrier_off(sdata->dev);
2163 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2164 const char *ssid, int ssid_len)
2166 int tmp, hidden_ssid;
2168 if (ssid_len == ifsta->ssid_len &&
2169 !memcmp(ifsta->ssid, ssid, ssid_len))
2172 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2178 if (ssid[tmp] != '\0') {
2184 if (hidden_ssid && (ifsta->ssid_len == ssid_len || ssid_len == 0))
2187 if (ssid_len == 1 && ssid[0] == ' ')
2193 static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
2194 struct ieee80211_if_sta *ifsta)
2196 struct ieee80211_local *local = sdata->local;
2197 struct ieee80211_bss *bss;
2198 struct ieee80211_supported_band *sband;
2199 u8 bssid[ETH_ALEN], *pos;
2203 if (sdata->u.sta.flags & IEEE80211_STA_BSSID_SET) {
2204 memcpy(bssid, ifsta->bssid, ETH_ALEN);
2206 /* Generate random, not broadcast, locally administered BSSID. Mix in
2207 * own MAC address to make sure that devices that do not have proper
2208 * random number generator get different BSSID. */
2209 get_random_bytes(bssid, ETH_ALEN);
2210 for (i = 0; i < ETH_ALEN; i++)
2211 bssid[i] ^= sdata->dev->dev_addr[i];
2216 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %pM\n",
2217 sdata->dev->name, bssid);
2219 bss = ieee80211_rx_bss_add(local, bssid,
2220 local->hw.conf.channel->center_freq,
2221 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
2225 bss->band = local->hw.conf.channel->band;
2226 sband = local->hw.wiphy->bands[bss->band];
2228 if (local->hw.conf.beacon_int == 0)
2229 local->hw.conf.beacon_int = 100;
2230 bss->beacon_int = local->hw.conf.beacon_int;
2231 bss->last_update = jiffies;
2232 bss->capability = WLAN_CAPABILITY_IBSS;
2234 if (sdata->default_key)
2235 bss->capability |= WLAN_CAPABILITY_PRIVACY;
2237 sdata->drop_unencrypted = 0;
2239 bss->supp_rates_len = sband->n_bitrates;
2240 pos = bss->supp_rates;
2241 for (i = 0; i < sband->n_bitrates; i++) {
2242 int rate = sband->bitrates[i].bitrate;
2243 *pos++ = (u8) (rate / 5);
2246 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
2247 ieee80211_rx_bss_put(local, bss);
2252 static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
2253 struct ieee80211_if_sta *ifsta)
2255 struct ieee80211_local *local = sdata->local;
2256 struct ieee80211_bss *bss;
2261 if (ifsta->ssid_len == 0)
2264 active_ibss = ieee80211_sta_active_ibss(sdata);
2265 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2266 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2267 sdata->dev->name, active_ibss);
2268 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2269 spin_lock_bh(&local->bss_lock);
2270 list_for_each_entry(bss, &local->bss_list, list) {
2271 if (ifsta->ssid_len != bss->ssid_len ||
2272 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2273 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2275 if ((ifsta->flags & IEEE80211_STA_BSSID_SET) &&
2276 memcmp(ifsta->bssid, bss->bssid, ETH_ALEN) != 0)
2278 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2279 printk(KERN_DEBUG " bssid=%pM found\n", bss->bssid);
2280 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2281 memcpy(bssid, bss->bssid, ETH_ALEN);
2283 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2286 spin_unlock_bh(&local->bss_lock);
2288 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2290 printk(KERN_DEBUG " sta_find_ibss: selected %pM current "
2291 "%pM\n", bssid, ifsta->bssid);
2292 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2295 ((!(ifsta->flags & IEEE80211_STA_PREV_BSSID_SET)) ||
2296 memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0)) {
2300 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2301 search_freq = bss->freq;
2303 search_freq = local->hw.conf.channel->center_freq;
2305 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
2306 ifsta->ssid, ifsta->ssid_len);
2310 printk(KERN_DEBUG "%s: Selected IBSS BSSID %pM"
2311 " based on configured SSID\n",
2312 sdata->dev->name, bssid);
2313 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
2314 ieee80211_rx_bss_put(local, bss);
2319 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2320 printk(KERN_DEBUG " did not try to join ibss\n");
2321 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2323 /* Selected IBSS not found in current scan results - try to scan */
2324 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
2325 !ieee80211_sta_active_ibss(sdata)) {
2326 mod_timer(&ifsta->timer, jiffies +
2327 IEEE80211_IBSS_MERGE_INTERVAL);
2328 } else if (time_after(jiffies, local->last_scan_completed +
2329 IEEE80211_SCAN_INTERVAL)) {
2330 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
2331 "join\n", sdata->dev->name);
2332 return ieee80211_request_scan(sdata, ifsta->ssid,
2334 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
2335 int interval = IEEE80211_SCAN_INTERVAL;
2337 if (time_after(jiffies, ifsta->ibss_join_req +
2338 IEEE80211_IBSS_JOIN_TIMEOUT)) {
2339 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
2340 (!(local->oper_channel->flags &
2341 IEEE80211_CHAN_NO_IBSS)))
2342 return ieee80211_sta_create_ibss(sdata, ifsta);
2343 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
2344 printk(KERN_DEBUG "%s: IBSS not allowed on"
2345 " %d MHz\n", sdata->dev->name,
2346 local->hw.conf.channel->center_freq);
2349 /* No IBSS found - decrease scan interval and continue
2351 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2354 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2355 mod_timer(&ifsta->timer, jiffies + interval);
2363 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
2364 struct ieee80211_if_sta *ifsta)
2366 struct ieee80211_local *local = sdata->local;
2367 struct ieee80211_bss *bss, *selected = NULL;
2368 int top_rssi = 0, freq;
2370 spin_lock_bh(&local->bss_lock);
2371 freq = local->oper_channel->center_freq;
2372 list_for_each_entry(bss, &local->bss_list, list) {
2373 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2376 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2377 IEEE80211_STA_AUTO_BSSID_SEL |
2378 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
2379 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2380 !!sdata->default_key))
2383 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2387 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2388 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2391 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2392 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2395 if (!selected || top_rssi < bss->signal) {
2397 top_rssi = bss->signal;
2401 atomic_inc(&selected->users);
2402 spin_unlock_bh(&local->bss_lock);
2405 ieee80211_set_freq(sdata, selected->freq);
2406 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2407 ieee80211_sta_set_ssid(sdata, selected->ssid,
2408 selected->ssid_len);
2409 ieee80211_sta_set_bssid(sdata, selected->bssid);
2410 ieee80211_sta_def_wmm_params(sdata, selected);
2411 if (sdata->u.sta.mfp == IEEE80211_MFP_REQUIRED)
2412 sdata->u.sta.flags |= IEEE80211_STA_MFP_ENABLED;
2414 sdata->u.sta.flags &= ~IEEE80211_STA_MFP_ENABLED;
2416 /* Send out direct probe if no probe resp was received or
2417 * the one we have is outdated
2419 if (!selected->last_probe_resp ||
2420 time_after(jiffies, selected->last_probe_resp
2421 + IEEE80211_SCAN_RESULT_EXPIRE))
2422 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2424 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2426 ieee80211_rx_bss_put(local, selected);
2427 ieee80211_sta_reset_auth(sdata, ifsta);
2430 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2431 ifsta->assoc_scan_tries++;
2432 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
2433 ieee80211_start_scan(sdata, NULL, 0);
2435 ieee80211_start_scan(sdata, ifsta->ssid,
2437 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2438 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2440 ifsta->assoc_scan_tries = 0;
2441 ifsta->state = IEEE80211_STA_MLME_DISABLED;
2448 static void ieee80211_sta_work(struct work_struct *work)
2450 struct ieee80211_sub_if_data *sdata =
2451 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2452 struct ieee80211_local *local = sdata->local;
2453 struct ieee80211_if_sta *ifsta;
2454 struct sk_buff *skb;
2456 if (!netif_running(sdata->dev))
2459 if (local->sw_scanning || local->hw_scanning)
2462 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION &&
2463 sdata->vif.type != NL80211_IFTYPE_ADHOC))
2465 ifsta = &sdata->u.sta;
2467 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2468 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2470 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2471 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2472 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
2473 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
2474 ieee80211_start_scan(sdata, ifsta->scan_ssid,
2475 ifsta->scan_ssid_len);
2479 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2480 if (ieee80211_sta_config_auth(sdata, ifsta))
2482 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2483 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2486 switch (ifsta->state) {
2487 case IEEE80211_STA_MLME_DISABLED:
2489 case IEEE80211_STA_MLME_DIRECT_PROBE:
2490 ieee80211_direct_probe(sdata, ifsta);
2492 case IEEE80211_STA_MLME_AUTHENTICATE:
2493 ieee80211_authenticate(sdata, ifsta);
2495 case IEEE80211_STA_MLME_ASSOCIATE:
2496 ieee80211_associate(sdata, ifsta);
2498 case IEEE80211_STA_MLME_ASSOCIATED:
2499 ieee80211_associated(sdata, ifsta);
2501 case IEEE80211_STA_MLME_IBSS_SEARCH:
2502 ieee80211_sta_find_ibss(sdata, ifsta);
2504 case IEEE80211_STA_MLME_IBSS_JOINED:
2505 ieee80211_sta_merge_ibss(sdata, ifsta);
2512 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
2513 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2514 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2516 ieee80211_set_disassoc(sdata, ifsta, false, true,
2517 WLAN_REASON_UNSPECIFIED);
2521 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2523 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2524 queue_work(sdata->local->hw.workqueue,
2525 &sdata->u.sta.work);
2528 /* interface setup */
2529 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2531 struct ieee80211_if_sta *ifsta;
2533 ifsta = &sdata->u.sta;
2534 INIT_WORK(&ifsta->work, ieee80211_sta_work);
2535 INIT_WORK(&ifsta->chswitch_work, ieee80211_chswitch_work);
2536 setup_timer(&ifsta->timer, ieee80211_sta_timer,
2537 (unsigned long) sdata);
2538 setup_timer(&ifsta->chswitch_timer, ieee80211_chswitch_timer,
2539 (unsigned long) sdata);
2540 skb_queue_head_init(&ifsta->skb_queue);
2542 ifsta->capab = WLAN_CAPABILITY_ESS;
2543 ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2544 IEEE80211_AUTH_ALG_SHARED_KEY;
2545 ifsta->flags |= IEEE80211_STA_CREATE_IBSS |
2546 IEEE80211_STA_AUTO_BSSID_SEL |
2547 IEEE80211_STA_AUTO_CHANNEL_SEL;
2548 if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4)
2549 ifsta->flags |= IEEE80211_STA_WMM_ENABLED;
2553 * Add a new IBSS station, will also be called by the RX code when,
2554 * in IBSS mode, receiving a frame from a yet-unknown station, hence
2555 * must be callable in atomic context.
2557 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
2558 u8 *bssid,u8 *addr, u32 supp_rates)
2560 struct ieee80211_local *local = sdata->local;
2561 struct sta_info *sta;
2562 int band = local->hw.conf.channel->band;
2564 /* TODO: Could consider removing the least recently used entry and
2565 * allow new one to be added. */
2566 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
2567 if (net_ratelimit()) {
2568 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
2569 "entry %pM\n", sdata->dev->name, addr);
2574 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
2577 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2578 printk(KERN_DEBUG "%s: Adding new IBSS station %pM (dev=%s)\n",
2579 wiphy_name(local->hw.wiphy), addr, sdata->dev->name);
2582 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
2586 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
2588 /* make sure mandatory rates are always added */
2589 sta->sta.supp_rates[band] = supp_rates |
2590 ieee80211_mandatory_rates(local, band);
2592 rate_control_rate_init(sta);
2594 if (sta_info_insert(sta))
2600 /* configuration hooks */
2601 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
2602 struct ieee80211_if_sta *ifsta)
2604 struct ieee80211_local *local = sdata->local;
2606 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2609 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2610 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2611 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2612 IEEE80211_STA_AUTO_SSID_SEL))) {
2614 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED)
2615 ieee80211_set_disassoc(sdata, ifsta, true, true,
2616 WLAN_REASON_DEAUTH_LEAVING);
2618 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2619 queue_work(local->hw.workqueue, &ifsta->work);
2623 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2625 struct ieee80211_if_sta *ifsta;
2627 if (len > IEEE80211_MAX_SSID_LEN)
2630 ifsta = &sdata->u.sta;
2632 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
2633 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
2634 memcpy(ifsta->ssid, ssid, len);
2635 ifsta->ssid_len = len;
2638 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2641 ifsta->flags |= IEEE80211_STA_SSID_SET;
2643 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
2645 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
2646 ifsta->ibss_join_req = jiffies;
2647 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2648 return ieee80211_sta_find_ibss(sdata, ifsta);
2654 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2656 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2657 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2658 *len = ifsta->ssid_len;
2662 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2664 struct ieee80211_if_sta *ifsta;
2666 ifsta = &sdata->u.sta;
2668 if (is_valid_ether_addr(bssid)) {
2669 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2670 ifsta->flags |= IEEE80211_STA_BSSID_SET;
2672 memset(ifsta->bssid, 0, ETH_ALEN);
2673 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
2676 if (netif_running(sdata->dev)) {
2677 if (ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID)) {
2678 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2679 "the low-level driver\n", sdata->dev->name);
2683 return ieee80211_sta_set_ssid(sdata, ifsta->ssid, ifsta->ssid_len);
2686 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
2688 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2690 kfree(ifsta->extra_ie);
2692 ifsta->extra_ie = NULL;
2693 ifsta->extra_ie_len = 0;
2696 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
2697 if (!ifsta->extra_ie) {
2698 ifsta->extra_ie_len = 0;
2701 memcpy(ifsta->extra_ie, ie, len);
2702 ifsta->extra_ie_len = len;
2706 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2708 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2710 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2711 sdata->dev->name, reason);
2713 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
2714 sdata->vif.type != NL80211_IFTYPE_ADHOC)
2717 ieee80211_set_disassoc(sdata, ifsta, true, true, reason);
2721 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2723 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2725 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2726 sdata->dev->name, reason);
2728 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2731 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
2734 ieee80211_set_disassoc(sdata, ifsta, false, true, reason);
2738 /* scan finished notification */
2739 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2741 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2742 struct ieee80211_if_sta *ifsta;
2744 if (sdata && sdata->vif.type == NL80211_IFTYPE_ADHOC) {
2745 ifsta = &sdata->u.sta;
2746 if ((!(ifsta->flags & IEEE80211_STA_PREV_BSSID_SET)) ||
2747 !ieee80211_sta_active_ibss(sdata))
2748 ieee80211_sta_find_ibss(sdata, ifsta);
2751 /* Restart STA timers */
2753 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2754 ieee80211_restart_sta_timer(sdata);
2758 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
2760 struct ieee80211_local *local =
2761 container_of(work, struct ieee80211_local,
2762 dynamic_ps_disable_work);
2764 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2765 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2766 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2769 ieee80211_wake_queues_by_reason(&local->hw,
2770 IEEE80211_QUEUE_STOP_REASON_PS);
2773 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
2775 struct ieee80211_local *local =
2776 container_of(work, struct ieee80211_local,
2777 dynamic_ps_enable_work);
2778 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2780 if (local->hw.conf.flags & IEEE80211_CONF_PS)
2783 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
2784 ieee80211_send_nullfunc(local, sdata, 1);
2786 local->hw.conf.flags |= IEEE80211_CONF_PS;
2787 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2790 void ieee80211_dynamic_ps_timer(unsigned long data)
2792 struct ieee80211_local *local = (void *) data;
2794 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);