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/etherdevice.h>
19 #include <linux/rtnetlink.h>
20 #include <net/mac80211.h>
21 #include <asm/unaligned.h>
23 #include "ieee80211_i.h"
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)
37 static int ecw2cw(int ecw)
39 return (1 << ecw) - 1;
42 static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
46 pos = bss->cbss.information_elements;
49 end = pos + bss->cbss.len_information_elements;
51 while (pos + 1 < end) {
52 if (pos + 2 + pos[1] > end)
62 static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
63 struct ieee80211_supported_band *sband,
69 for (i = 0; i < bss->supp_rates_len; i++) {
70 int rate = (bss->supp_rates[i] & 0x7F) * 5;
72 for (j = 0; j < sband->n_bitrates; j++)
73 if (sband->bitrates[j].bitrate == rate) {
83 /* frame sending functions */
85 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
87 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
88 struct ieee80211_local *local = sdata->local;
90 struct ieee80211_mgmt *mgmt;
91 u8 *pos, *ies, *ht_ie;
92 int i, len, count, rates_len, supp_rates_len;
94 struct ieee80211_bss *bss;
96 struct ieee80211_supported_band *sband;
99 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
100 sizeof(*mgmt) + 200 + ifmgd->extra_ie_len +
103 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
104 "frame\n", sdata->dev->name);
107 skb_reserve(skb, local->hw.extra_tx_headroom);
109 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
111 capab = ifmgd->capab;
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;
120 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
121 local->hw.conf.channel->center_freq,
122 ifmgd->ssid, ifmgd->ssid_len);
124 if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
125 capab |= WLAN_CAPABILITY_PRIVACY;
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
133 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
135 if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
136 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
137 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
139 ieee80211_rx_bss_put(local, bss);
142 rates_len = sband->n_bitrates;
145 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 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);
151 if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) {
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,
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);
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);
175 /* add all rates which were marked to be used above */
176 supp_rates_len = rates_len;
177 if (supp_rates_len > 8)
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;
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);
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;
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);
208 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
209 /* 1. power capabilities */
210 pos = skb_put(skb, 4);
211 *pos++ = WLAN_EID_PWR_CAPABILITY;
213 *pos++ = 0; /* min tx power */
214 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
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*/
228 if (ifmgd->extra_ie) {
229 pos = skb_put(skb, ifmgd->extra_ie_len);
230 memcpy(pos, ifmgd->extra_ie, ifmgd->extra_ie_len);
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 */
240 *pos++ = 2; /* WME */
241 *pos++ = 0; /* WME info */
242 *pos++ = 1; /* WME ver */
246 /* wmm support is a must to HT */
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.
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;
262 u32 flags = local->hw.conf.channel->flags;
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;
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;
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));
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));
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);
298 ieee80211_tx_skb(sdata, skb, 0);
302 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
303 u16 stype, u16 reason)
305 struct ieee80211_local *local = sdata->local;
306 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
308 struct ieee80211_mgmt *mgmt;
310 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
312 printk(KERN_DEBUG "%s: failed to allocate buffer for "
313 "deauth/disassoc frame\n", sdata->dev->name);
316 skb_reserve(skb, local->hw.extra_tx_headroom);
318 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 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);
325 /* u.deauth.reason_code == u.disassoc.reason_code */
326 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
328 ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
331 void ieee80211_send_pspoll(struct ieee80211_local *local,
332 struct ieee80211_sub_if_data *sdata)
334 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
335 struct ieee80211_pspoll *pspoll;
339 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
341 printk(KERN_DEBUG "%s: failed to allocate buffer for "
342 "pspoll frame\n", sdata->dev->name);
345 skb_reserve(skb, local->hw.extra_tx_headroom);
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);
353 /* aid in PS-Poll has its two MSBs each set to 1 */
354 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
356 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
357 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
359 ieee80211_tx_skb(sdata, skb, 0);
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)
367 struct ieee80211_tx_queue_params params;
372 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
378 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
380 count = wmm_param[6] & 0x0f;
381 if (count == ifmgd->wmm_last_param_set)
383 ifmgd->wmm_last_param_set = count;
386 left = wmm_param_len - 8;
388 memset(¶ms, 0, sizeof(params));
391 for (; left >= 4; left -= 4, pos += 4) {
392 int aci = (pos[0] >> 5) & 0x03;
393 int acm = (pos[0] >> 4) & 0x01;
400 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
405 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
410 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
416 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
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);
430 if (local->ops->conf_tx &&
431 local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) {
432 printk(KERN_DEBUG "%s: failed to set TX queue "
433 "parameters for queue %d\n", local->mdev->name, queue);
438 static bool ieee80211_check_tim(struct ieee802_11_elems *elems, u16 aid)
441 u8 index, indexn1, indexn2;
442 struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *) elems->tim;
446 mask = 1 << (aid & 7);
448 indexn1 = tim->bitmap_ctrl & 0xfe;
449 indexn2 = elems->tim_len + indexn1 - 4;
451 if (index < indexn1 || index > indexn2)
456 return !!(tim->virtual_map[index] & mask);
459 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
460 u16 capab, bool erp_valid, u8 erp)
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;
468 bool use_short_preamble;
472 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
473 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
475 use_protection = false;
476 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
479 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
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",
486 use_protection ? "enabled" : "disabled",
490 bss_conf->use_cts_prot = use_protection;
491 changed |= BSS_CHANGED_ERP_CTS_PROT;
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"
500 use_short_preamble ? "short" : "long",
504 bss_conf->use_short_preamble = use_short_preamble;
505 changed |= BSS_CHANGED_ERP_PREAMBLE;
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"
514 use_short_slot ? "short" : "long",
518 bss_conf->use_short_slot = use_short_slot;
519 changed |= BSS_CHANGED_ERP_SLOT;
525 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata)
527 union iwreq_data wrqu;
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);
536 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata)
538 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
542 union iwreq_data wrqu;
544 if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies)
547 buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len +
548 ifmgd->assocresp_ies_len), GFP_KERNEL);
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]);
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]);
569 len += sprintf(buf + len, ")");
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]);
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);
589 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
590 u32 bss_info_changed)
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;
596 struct ieee80211_bss *bss;
598 bss_info_changed |= BSS_CHANGED_ASSOC;
599 ifmgd->flags |= IEEE80211_STA_ASSOCIATED;
601 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
602 conf->channel->center_freq,
603 ifmgd->ssid, ifmgd->ssid_len);
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;
610 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
611 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
613 ieee80211_rx_bss_put(local, bss);
616 ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET;
617 memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN);
618 ieee80211_sta_send_associnfo(sdata);
620 ifmgd->last_probe = jiffies;
621 ieee80211_led_assoc(local, 1);
623 sdata->vif.bss_conf.assoc = 1;
625 * For now just always ask the driver to update the basic rateset
626 * when we have associated, we aren't checking whether it actually
629 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
630 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
632 if (local->powersave) {
633 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) &&
634 local->hw.conf.dynamic_ps_timeout > 0) {
635 mod_timer(&local->dynamic_ps_timer, jiffies +
637 local->hw.conf.dynamic_ps_timeout));
639 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
640 ieee80211_send_nullfunc(local, sdata, 1);
641 conf->flags |= IEEE80211_CONF_PS;
642 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
646 netif_tx_start_all_queues(sdata->dev);
647 netif_carrier_on(sdata->dev);
649 ieee80211_sta_send_apinfo(sdata);
652 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata)
654 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
655 struct ieee80211_local *local = sdata->local;
657 ifmgd->direct_probe_tries++;
658 if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
659 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
660 sdata->dev->name, ifmgd->bssid);
661 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
662 ieee80211_sta_send_apinfo(sdata);
665 * Most likely AP is not in the range so remove the
666 * bss information associated to the AP
668 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
669 sdata->local->hw.conf.channel->center_freq,
670 ifmgd->ssid, ifmgd->ssid_len);
673 * We might have a pending scan which had no chance to run yet
674 * due to state == IEEE80211_STA_MLME_DIRECT_PROBE.
675 * Hence, queue the STAs work again
677 queue_work(local->hw.workqueue, &ifmgd->work);
681 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
682 sdata->dev->name, ifmgd->bssid,
683 ifmgd->direct_probe_tries);
685 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
687 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifmgd->request);
689 /* Direct probe is sent to broadcast address as some APs
690 * will not answer to direct packet in unassociated state.
692 ieee80211_send_probe_req(sdata, NULL,
693 ifmgd->ssid, ifmgd->ssid_len, NULL, 0);
695 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
699 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata)
701 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
702 struct ieee80211_local *local = sdata->local;
707 if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
708 printk(KERN_DEBUG "%s: authentication with AP %pM"
710 sdata->dev->name, ifmgd->bssid);
711 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
712 ieee80211_sta_send_apinfo(sdata);
713 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
714 sdata->local->hw.conf.channel->center_freq,
715 ifmgd->ssid, ifmgd->ssid_len);
718 * We might have a pending scan which had no chance to run yet
719 * due to state == IEEE80211_STA_MLME_AUTHENTICATE.
720 * Hence, queue the STAs work again
722 queue_work(local->hw.workqueue, &ifmgd->work);
726 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
727 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
728 sdata->dev->name, ifmgd->bssid);
730 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
731 ies = ifmgd->sme_auth_ie;
732 ies_len = ifmgd->sme_auth_ie_len;
737 ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ies, ies_len,
739 ifmgd->auth_transaction = 2;
741 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
745 * The disassoc 'reason' argument can be either our own reason
746 * if self disconnected or a reason code from the AP.
748 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
749 bool deauth, bool self_disconnected,
752 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
753 struct ieee80211_local *local = sdata->local;
754 struct sta_info *sta;
755 u32 changed = 0, config_changed = 0;
759 sta = sta_info_get(local, ifmgd->bssid);
766 ifmgd->direct_probe_tries = 0;
767 ifmgd->auth_tries = 0;
769 ifmgd->assoc_scan_tries = 0;
770 ifmgd->assoc_tries = 0;
772 netif_tx_stop_all_queues(sdata->dev);
773 netif_carrier_off(sdata->dev);
775 ieee80211_sta_tear_down_BA_sessions(sta);
777 if (self_disconnected) {
779 ieee80211_send_deauth_disassoc(sdata,
780 IEEE80211_STYPE_DEAUTH, reason);
782 ieee80211_send_deauth_disassoc(sdata,
783 IEEE80211_STYPE_DISASSOC, reason);
786 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
787 changed |= ieee80211_reset_erp_info(sdata);
789 ieee80211_led_assoc(local, 0);
790 changed |= BSS_CHANGED_ASSOC;
791 sdata->vif.bss_conf.assoc = false;
793 ieee80211_sta_send_apinfo(sdata);
795 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
796 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
797 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
798 sdata->local->hw.conf.channel->center_freq,
799 ifmgd->ssid, ifmgd->ssid_len);
804 /* channel(_type) changes are handled by ieee80211_hw_config */
805 local->oper_channel_type = NL80211_CHAN_NO_HT;
807 local->power_constr_level = 0;
809 del_timer_sync(&local->dynamic_ps_timer);
810 cancel_work_sync(&local->dynamic_ps_enable_work);
812 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
813 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
814 config_changed |= IEEE80211_CONF_CHANGE_PS;
817 ieee80211_hw_config(local, config_changed);
818 ieee80211_bss_info_change_notify(sdata, changed);
822 sta = sta_info_get(local, ifmgd->bssid);
828 sta_info_unlink(&sta);
832 sta_info_destroy(sta);
835 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
837 if (!sdata || !sdata->default_key ||
838 sdata->default_key->conf.alg != ALG_WEP)
843 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata)
845 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
846 struct ieee80211_local *local = sdata->local;
847 struct ieee80211_bss *bss;
852 if (!ifmgd || (ifmgd->flags & IEEE80211_STA_EXT_SME))
855 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
856 local->hw.conf.channel->center_freq,
857 ifmgd->ssid, ifmgd->ssid_len);
861 bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY);
862 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
863 privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED);
865 ieee80211_rx_bss_put(local, bss);
867 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
873 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata)
875 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
876 struct ieee80211_local *local = sdata->local;
878 ifmgd->assoc_tries++;
879 if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
880 printk(KERN_DEBUG "%s: association with AP %pM"
882 sdata->dev->name, ifmgd->bssid);
883 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
884 ieee80211_sta_send_apinfo(sdata);
885 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
886 sdata->local->hw.conf.channel->center_freq,
887 ifmgd->ssid, ifmgd->ssid_len);
889 * We might have a pending scan which had no chance to run yet
890 * due to state == IEEE80211_STA_MLME_ASSOCIATE.
891 * Hence, queue the STAs work again
893 queue_work(local->hw.workqueue, &ifmgd->work);
897 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
898 printk(KERN_DEBUG "%s: associate with AP %pM\n",
899 sdata->dev->name, ifmgd->bssid);
900 if (ieee80211_privacy_mismatch(sdata)) {
901 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
902 "mixed-cell disabled - abort association\n", sdata->dev->name);
903 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
907 ieee80211_send_assoc(sdata);
909 mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
912 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
913 struct ieee80211_hdr *hdr)
916 * We can postpone the mgd.timer whenever receiving unicast frames
917 * from AP because we know that the connection is working both ways
918 * at that time. But multicast frames (and hence also beacons) must
919 * be ignored here, because we need to trigger the timer during
920 * data idle periods for sending the periodical probe request to
923 if (!is_multicast_ether_addr(hdr->addr1))
924 mod_timer(&sdata->u.mgd.timer,
925 jiffies + IEEE80211_MONITORING_INTERVAL);
928 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
930 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
931 struct ieee80211_local *local = sdata->local;
932 struct sta_info *sta;
933 bool disassoc = false;
935 /* TODO: start monitoring current AP signal quality and number of
936 * missed beacons. Scan other channels every now and then and search
938 /* TODO: remove expired BSSes */
940 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED;
944 sta = sta_info_get(local, ifmgd->bssid);
946 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
947 sdata->dev->name, ifmgd->bssid);
952 if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) &&
953 time_after(jiffies, sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
954 printk(KERN_DEBUG "%s: no probe response from AP %pM "
955 "- disassociating\n",
956 sdata->dev->name, ifmgd->bssid);
958 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
962 if (time_after(jiffies,
963 ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) {
964 printk(KERN_DEBUG "%s: beacon loss from AP %pM "
965 "- sending probe request\n",
966 sdata->dev->name, ifmgd->bssid);
967 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
968 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
969 ifmgd->ssid_len, NULL, 0);
974 if (time_after(jiffies, sta->last_rx + IEEE80211_PROBE_IDLE_TIME)) {
975 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
976 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
977 ifmgd->ssid_len, NULL, 0);
984 ieee80211_set_disassoc(sdata, true, true,
985 WLAN_REASON_PREV_AUTH_NOT_VALID);
987 mod_timer(&ifmgd->timer, jiffies +
988 IEEE80211_MONITORING_INTERVAL);
992 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata)
994 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
996 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
997 ifmgd->flags |= IEEE80211_STA_AUTHENTICATED;
998 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
999 /* Wait for SME to request association */
1000 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1002 ieee80211_associate(sdata);
1006 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1007 struct ieee80211_mgmt *mgmt,
1011 struct ieee802_11_elems elems;
1013 pos = mgmt->u.auth.variable;
1014 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1015 if (!elems.challenge)
1017 ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg,
1018 elems.challenge - 2, elems.challenge_len + 2,
1019 sdata->u.mgd.bssid, 1);
1020 sdata->u.mgd.auth_transaction = 4;
1023 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1024 struct ieee80211_mgmt *mgmt,
1027 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1028 u16 auth_alg, auth_transaction, status_code;
1030 if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE)
1036 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1039 if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1042 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1043 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1044 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1046 if (auth_alg != ifmgd->auth_alg ||
1047 auth_transaction != ifmgd->auth_transaction)
1050 if (status_code != WLAN_STATUS_SUCCESS) {
1051 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1053 const int num_algs = ARRAY_SIZE(algs);
1055 algs[0] = algs[1] = algs[2] = 0xff;
1056 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1057 algs[0] = WLAN_AUTH_OPEN;
1058 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1059 algs[1] = WLAN_AUTH_SHARED_KEY;
1060 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1061 algs[2] = WLAN_AUTH_LEAP;
1062 if (ifmgd->auth_alg == WLAN_AUTH_OPEN)
1064 else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY)
1068 for (i = 0; i < num_algs; i++) {
1070 if (pos >= num_algs)
1072 if (algs[pos] == ifmgd->auth_alg ||
1075 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1076 !ieee80211_sta_wep_configured(sdata))
1078 ifmgd->auth_alg = algs[pos];
1085 switch (ifmgd->auth_alg) {
1086 case WLAN_AUTH_OPEN:
1087 case WLAN_AUTH_LEAP:
1089 ieee80211_auth_completed(sdata);
1090 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1092 case WLAN_AUTH_SHARED_KEY:
1093 if (ifmgd->auth_transaction == 4) {
1094 ieee80211_auth_completed(sdata);
1095 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1097 ieee80211_auth_challenge(sdata, mgmt, len);
1103 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1104 struct ieee80211_mgmt *mgmt,
1107 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1113 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1116 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1118 if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED)
1119 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1120 sdata->dev->name, reason_code);
1122 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1123 (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1124 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE ||
1125 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) {
1126 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1127 mod_timer(&ifmgd->timer, jiffies +
1128 IEEE80211_RETRY_AUTH_INTERVAL);
1131 ieee80211_set_disassoc(sdata, true, false, 0);
1132 ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED;
1133 cfg80211_send_rx_deauth(sdata->dev, (u8 *) mgmt, len);
1137 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1138 struct ieee80211_mgmt *mgmt,
1141 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1147 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1150 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1152 if (ifmgd->flags & IEEE80211_STA_ASSOCIATED)
1153 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1154 sdata->dev->name, reason_code);
1156 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1157 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1158 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1159 mod_timer(&ifmgd->timer, jiffies +
1160 IEEE80211_RETRY_AUTH_INTERVAL);
1163 ieee80211_set_disassoc(sdata, false, false, reason_code);
1164 cfg80211_send_rx_disassoc(sdata->dev, (u8 *) mgmt, len);
1168 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1169 struct ieee80211_mgmt *mgmt,
1173 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1174 struct ieee80211_local *local = sdata->local;
1175 struct ieee80211_supported_band *sband;
1176 struct sta_info *sta;
1177 u32 rates, basic_rates;
1178 u16 capab_info, status_code, aid;
1179 struct ieee802_11_elems elems;
1180 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1184 bool have_higher_than_11mbit = false, newsta = false;
1185 u16 ap_ht_cap_flags;
1187 /* AssocResp and ReassocResp have identical structure, so process both
1188 * of them in this function. */
1190 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1196 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1199 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1200 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1201 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1203 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1204 "status=%d aid=%d)\n",
1205 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1206 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1208 pos = mgmt->u.assoc_resp.variable;
1209 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1211 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1212 elems.timeout_int && elems.timeout_int_len == 5 &&
1213 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1215 tu = get_unaligned_le32(elems.timeout_int + 1);
1216 ms = tu * 1024 / 1000;
1217 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1218 "comeback duration %u TU (%u ms)\n",
1219 sdata->dev->name, tu, ms);
1220 if (ms > IEEE80211_ASSOC_TIMEOUT)
1221 mod_timer(&ifmgd->timer,
1222 jiffies + msecs_to_jiffies(ms));
1226 if (status_code != WLAN_STATUS_SUCCESS) {
1227 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1228 sdata->dev->name, status_code);
1229 /* if this was a reassociation, ensure we try a "full"
1230 * association next time. This works around some broken APs
1231 * which do not correctly reject reassociation requests. */
1232 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1236 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1237 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1238 "set\n", sdata->dev->name, aid);
1239 aid &= ~(BIT(15) | BIT(14));
1241 if (!elems.supp_rates) {
1242 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1247 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1249 ifmgd->ap_capab = capab_info;
1251 kfree(ifmgd->assocresp_ies);
1252 ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1253 ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL);
1254 if (ifmgd->assocresp_ies)
1255 memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len);
1259 /* Add STA entry for the AP */
1260 sta = sta_info_get(local, ifmgd->bssid);
1264 sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC);
1266 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1267 " the AP\n", sdata->dev->name);
1272 /* update new sta with its last rx activity */
1273 sta->last_rx = jiffies;
1277 * FIXME: Do we really need to update the sta_info's information here?
1278 * We already know about the AP (we found it in our list) so it
1279 * should already be filled with the right info, no?
1280 * As is stands, all this is racy because typically we assume
1281 * the information that is filled in here (except flags) doesn't
1282 * change while a STA structure is alive. As such, it should move
1283 * to between the sta_info_alloc() and sta_info_insert() above.
1286 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1287 WLAN_STA_AUTHORIZED);
1291 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1293 for (i = 0; i < elems.supp_rates_len; i++) {
1294 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1295 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1298 have_higher_than_11mbit = true;
1300 for (j = 0; j < sband->n_bitrates; j++) {
1301 if (sband->bitrates[j].bitrate == rate) {
1304 basic_rates |= BIT(j);
1310 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1311 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1312 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1315 have_higher_than_11mbit = true;
1317 for (j = 0; j < sband->n_bitrates; j++) {
1318 if (sband->bitrates[j].bitrate == rate) {
1321 basic_rates |= BIT(j);
1327 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1328 sdata->vif.bss_conf.basic_rates = basic_rates;
1330 /* cf. IEEE 802.11 9.2.12 */
1331 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1332 have_higher_than_11mbit)
1333 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1335 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1337 /* If TKIP/WEP is used, no need to parse AP's HT capabilities */
1338 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1339 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1340 elems.ht_cap_elem, &sta->sta.ht_cap);
1342 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1344 rate_control_rate_init(sta);
1346 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1347 set_sta_flags(sta, WLAN_STA_MFP);
1349 if (elems.wmm_param)
1350 set_sta_flags(sta, WLAN_STA_WME);
1353 int err = sta_info_insert(sta);
1355 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1356 " the AP (error %d)\n", sdata->dev->name, err);
1364 if (elems.wmm_param)
1365 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1366 elems.wmm_param_len);
1368 if (elems.ht_info_elem && elems.wmm_param &&
1369 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1370 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1371 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1374 /* set AID and assoc capability,
1375 * ieee80211_set_associated() will tell the driver */
1376 bss_conf->aid = aid;
1377 bss_conf->assoc_capability = capab_info;
1378 ieee80211_set_associated(sdata, changed);
1381 * initialise the time of last beacon to be the association time,
1382 * otherwise beacon loss check will trigger immediately
1384 ifmgd->last_beacon = jiffies;
1386 ieee80211_associated(sdata);
1387 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1391 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1392 struct ieee80211_mgmt *mgmt,
1394 struct ieee80211_rx_status *rx_status,
1395 struct ieee802_11_elems *elems,
1398 struct ieee80211_local *local = sdata->local;
1400 struct ieee80211_bss *bss;
1401 struct ieee80211_channel *channel;
1403 if (elems->ds_params && elems->ds_params_len == 1)
1404 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1406 freq = rx_status->freq;
1408 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1410 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1413 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1418 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1419 (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) {
1420 struct ieee80211_channel_sw_ie *sw_elem =
1421 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1422 ieee80211_process_chanswitch(sdata, sw_elem, bss);
1425 ieee80211_rx_bss_put(local, bss);
1429 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1430 struct ieee80211_mgmt *mgmt,
1432 struct ieee80211_rx_status *rx_status)
1434 struct ieee80211_if_managed *ifmgd;
1436 struct ieee802_11_elems elems;
1438 ifmgd = &sdata->u.mgd;
1440 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1441 return; /* ignore ProbeResp to foreign address */
1443 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1447 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1450 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1452 /* direct probe may be part of the association flow */
1453 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1455 printk(KERN_DEBUG "%s direct probe responded\n",
1457 ieee80211_authenticate(sdata);
1460 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
1461 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1464 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1465 struct ieee80211_mgmt *mgmt,
1467 struct ieee80211_rx_status *rx_status)
1469 struct ieee80211_if_managed *ifmgd;
1471 struct ieee802_11_elems elems;
1472 struct ieee80211_local *local = sdata->local;
1474 bool erp_valid, directed_tim;
1477 /* Process beacon from the current BSS */
1478 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1482 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1484 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
1486 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1489 ifmgd = &sdata->u.mgd;
1491 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) ||
1492 memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1495 if (rx_status->freq != local->hw.conf.channel->center_freq)
1498 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1499 elems.wmm_param_len);
1501 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1502 directed_tim = ieee80211_check_tim(&elems, ifmgd->aid);
1505 if (local->hw.conf.dynamic_ps_timeout > 0) {
1506 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1507 ieee80211_hw_config(local,
1508 IEEE80211_CONF_CHANGE_PS);
1509 ieee80211_send_nullfunc(local, sdata, 0);
1511 local->pspolling = true;
1514 * Here is assumed that the driver will be
1515 * able to send ps-poll frame and receive a
1516 * response even though power save mode is
1517 * enabled, but some drivers might require
1518 * to disable power save here. This needs
1519 * to be investigated.
1521 ieee80211_send_pspoll(local, sdata);
1526 if (elems.erp_info && elems.erp_info_len >= 1) {
1528 erp_value = elems.erp_info[0];
1532 changed |= ieee80211_handle_bss_capability(sdata,
1533 le16_to_cpu(mgmt->u.beacon.capab_info),
1534 erp_valid, erp_value);
1537 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1538 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) {
1539 struct sta_info *sta;
1540 struct ieee80211_supported_band *sband;
1541 u16 ap_ht_cap_flags;
1545 sta = sta_info_get(local, ifmgd->bssid);
1551 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1553 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1554 elems.ht_cap_elem, &sta->sta.ht_cap);
1556 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1560 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1564 if (elems.country_elem) {
1565 /* Note we are only reviewing this on beacons
1566 * for the BSSID we are associated to */
1567 regulatory_hint_11d(local->hw.wiphy,
1568 elems.country_elem, elems.country_elem_len);
1570 /* TODO: IBSS also needs this */
1571 if (elems.pwr_constr_elem)
1572 ieee80211_handle_pwr_constr(sdata,
1573 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1574 elems.pwr_constr_elem,
1575 elems.pwr_constr_elem_len);
1578 ieee80211_bss_info_change_notify(sdata, changed);
1581 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1582 struct sk_buff *skb,
1583 struct ieee80211_rx_status *rx_status)
1585 struct ieee80211_local *local = sdata->local;
1586 struct ieee80211_mgmt *mgmt;
1590 return RX_DROP_MONITOR;
1592 mgmt = (struct ieee80211_mgmt *) skb->data;
1593 fc = le16_to_cpu(mgmt->frame_control);
1595 switch (fc & IEEE80211_FCTL_STYPE) {
1596 case IEEE80211_STYPE_PROBE_REQ:
1597 case IEEE80211_STYPE_PROBE_RESP:
1598 case IEEE80211_STYPE_BEACON:
1599 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1600 case IEEE80211_STYPE_AUTH:
1601 case IEEE80211_STYPE_ASSOC_RESP:
1602 case IEEE80211_STYPE_REASSOC_RESP:
1603 case IEEE80211_STYPE_DEAUTH:
1604 case IEEE80211_STYPE_DISASSOC:
1605 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1606 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
1610 return RX_DROP_MONITOR;
1613 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1614 struct sk_buff *skb)
1616 struct ieee80211_rx_status *rx_status;
1617 struct ieee80211_mgmt *mgmt;
1620 rx_status = (struct ieee80211_rx_status *) skb->cb;
1621 mgmt = (struct ieee80211_mgmt *) skb->data;
1622 fc = le16_to_cpu(mgmt->frame_control);
1624 switch (fc & IEEE80211_FCTL_STYPE) {
1625 case IEEE80211_STYPE_PROBE_RESP:
1626 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
1629 case IEEE80211_STYPE_BEACON:
1630 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1633 case IEEE80211_STYPE_AUTH:
1634 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
1636 case IEEE80211_STYPE_ASSOC_RESP:
1637 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0);
1639 case IEEE80211_STYPE_REASSOC_RESP:
1640 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1);
1642 case IEEE80211_STYPE_DEAUTH:
1643 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1645 case IEEE80211_STYPE_DISASSOC:
1646 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1653 static void ieee80211_sta_timer(unsigned long data)
1655 struct ieee80211_sub_if_data *sdata =
1656 (struct ieee80211_sub_if_data *) data;
1657 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1658 struct ieee80211_local *local = sdata->local;
1660 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1661 queue_work(local->hw.workqueue, &ifmgd->work);
1664 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata)
1666 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1667 struct ieee80211_local *local = sdata->local;
1669 if (local->ops->reset_tsf) {
1670 /* Reset own TSF to allow time synchronization work. */
1671 local->ops->reset_tsf(local_to_hw(local));
1674 ifmgd->wmm_last_param_set = -1; /* allow any WMM update */
1677 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1678 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1679 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1680 ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY;
1681 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1682 ifmgd->auth_alg = WLAN_AUTH_LEAP;
1683 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_FT)
1684 ifmgd->auth_alg = WLAN_AUTH_FT;
1686 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1687 ifmgd->auth_transaction = -1;
1688 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
1689 ifmgd->assoc_scan_tries = 0;
1690 ifmgd->direct_probe_tries = 0;
1691 ifmgd->auth_tries = 0;
1692 ifmgd->assoc_tries = 0;
1693 netif_tx_stop_all_queues(sdata->dev);
1694 netif_carrier_off(sdata->dev);
1697 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata)
1699 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1700 struct ieee80211_local *local = sdata->local;
1701 struct ieee80211_bss *bss;
1702 u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid;
1703 u8 ssid_len = ifmgd->ssid_len;
1704 u16 capa_mask = WLAN_CAPABILITY_ESS;
1705 u16 capa_val = WLAN_CAPABILITY_ESS;
1706 struct ieee80211_channel *chan = local->oper_channel;
1708 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1709 ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL |
1710 IEEE80211_STA_AUTO_BSSID_SEL |
1711 IEEE80211_STA_AUTO_CHANNEL_SEL)) {
1712 capa_mask |= WLAN_CAPABILITY_PRIVACY;
1713 if (sdata->default_key)
1714 capa_val |= WLAN_CAPABILITY_PRIVACY;
1717 if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
1720 if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL)
1723 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) {
1728 bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
1729 bssid, ssid, ssid_len,
1730 capa_mask, capa_val);
1733 ieee80211_set_freq(sdata, bss->cbss.channel->center_freq);
1734 if (!(ifmgd->flags & IEEE80211_STA_SSID_SET))
1735 ieee80211_sta_set_ssid(sdata, bss->ssid,
1737 ieee80211_sta_set_bssid(sdata, bss->cbss.bssid);
1738 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
1740 if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED)
1741 sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED;
1743 sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED;
1745 /* Send out direct probe if no probe resp was received or
1746 * the one we have is outdated
1748 if (!bss->last_probe_resp ||
1749 time_after(jiffies, bss->last_probe_resp
1750 + IEEE80211_SCAN_RESULT_EXPIRE))
1751 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1753 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
1755 ieee80211_rx_bss_put(local, bss);
1756 ieee80211_sta_reset_auth(sdata);
1759 if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
1760 ifmgd->assoc_scan_tries++;
1761 /* XXX maybe racy? */
1762 if (local->scan_req)
1764 memcpy(local->int_scan_req.ssids[0].ssid,
1765 ifmgd->ssid, IEEE80211_MAX_SSID_LEN);
1766 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL)
1767 local->int_scan_req.ssids[0].ssid_len = 0;
1769 local->int_scan_req.ssids[0].ssid_len = ifmgd->ssid_len;
1771 if (ieee80211_start_scan(sdata, &local->int_scan_req))
1772 ieee80211_scan_failed(local);
1774 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
1775 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
1777 ifmgd->assoc_scan_tries = 0;
1778 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1785 static void ieee80211_sta_work(struct work_struct *work)
1787 struct ieee80211_sub_if_data *sdata =
1788 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
1789 struct ieee80211_local *local = sdata->local;
1790 struct ieee80211_if_managed *ifmgd;
1791 struct sk_buff *skb;
1793 if (!netif_running(sdata->dev))
1796 if (local->sw_scanning || local->hw_scanning)
1799 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1801 ifmgd = &sdata->u.mgd;
1803 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
1804 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1806 if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
1807 ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE &&
1808 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE &&
1809 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) {
1811 * The call to ieee80211_start_scan can fail but ieee80211_request_scan
1812 * (which queued ieee80211_sta_work) did not return an error. Thus, call
1813 * ieee80211_scan_failed here if ieee80211_start_scan fails in order to
1814 * notify the scan requester.
1816 if (ieee80211_start_scan(sdata, local->scan_req))
1817 ieee80211_scan_failed(local);
1821 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) {
1822 if (ieee80211_sta_config_auth(sdata))
1824 clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1825 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request))
1828 switch (ifmgd->state) {
1829 case IEEE80211_STA_MLME_DISABLED:
1831 case IEEE80211_STA_MLME_DIRECT_PROBE:
1832 ieee80211_direct_probe(sdata);
1834 case IEEE80211_STA_MLME_AUTHENTICATE:
1835 ieee80211_authenticate(sdata);
1837 case IEEE80211_STA_MLME_ASSOCIATE:
1838 ieee80211_associate(sdata);
1840 case IEEE80211_STA_MLME_ASSOCIATED:
1841 ieee80211_associated(sdata);
1848 if (ieee80211_privacy_mismatch(sdata)) {
1849 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
1850 "mixed-cell disabled - disassociate\n", sdata->dev->name);
1852 ieee80211_set_disassoc(sdata, false, true,
1853 WLAN_REASON_UNSPECIFIED);
1857 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
1859 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1860 queue_work(sdata->local->hw.workqueue,
1861 &sdata->u.mgd.work);
1864 /* interface setup */
1865 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
1867 struct ieee80211_if_managed *ifmgd;
1869 ifmgd = &sdata->u.mgd;
1870 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
1871 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1872 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
1873 (unsigned long) sdata);
1874 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
1875 (unsigned long) sdata);
1876 skb_queue_head_init(&ifmgd->skb_queue);
1878 ifmgd->capab = WLAN_CAPABILITY_ESS;
1879 ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN |
1880 IEEE80211_AUTH_ALG_SHARED_KEY;
1881 ifmgd->flags |= IEEE80211_STA_CREATE_IBSS |
1882 IEEE80211_STA_AUTO_BSSID_SEL |
1883 IEEE80211_STA_AUTO_CHANNEL_SEL;
1884 if (sdata->local->hw.queues >= 4)
1885 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
1888 /* configuration hooks */
1889 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata)
1891 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1892 struct ieee80211_local *local = sdata->local;
1894 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1897 if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET |
1898 IEEE80211_STA_AUTO_BSSID_SEL)) &&
1899 (ifmgd->flags & (IEEE80211_STA_SSID_SET |
1900 IEEE80211_STA_AUTO_SSID_SEL))) {
1902 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)
1903 ieee80211_set_disassoc(sdata, true, true,
1904 WLAN_REASON_DEAUTH_LEAVING);
1906 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) ||
1907 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1908 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
1909 else if (ifmgd->flags & IEEE80211_STA_EXT_SME)
1910 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1911 queue_work(local->hw.workqueue, &ifmgd->work);
1915 int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata)
1917 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1919 if (ifmgd->ssid_len)
1920 ifmgd->flags |= IEEE80211_STA_SSID_SET;
1922 ifmgd->flags &= ~IEEE80211_STA_SSID_SET;
1927 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
1929 struct ieee80211_if_managed *ifmgd;
1931 if (len > IEEE80211_MAX_SSID_LEN)
1934 ifmgd = &sdata->u.mgd;
1936 if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) {
1938 * Do not use reassociation if SSID is changed (different ESS).
1940 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1941 memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid));
1942 memcpy(ifmgd->ssid, ssid, len);
1943 ifmgd->ssid_len = len;
1946 return ieee80211_sta_commit(sdata);
1949 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
1951 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1952 memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len);
1953 *len = ifmgd->ssid_len;
1957 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
1959 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1961 if (is_valid_ether_addr(bssid)) {
1962 memcpy(ifmgd->bssid, bssid, ETH_ALEN);
1963 ifmgd->flags |= IEEE80211_STA_BSSID_SET;
1965 memset(ifmgd->bssid, 0, ETH_ALEN);
1966 ifmgd->flags &= ~IEEE80211_STA_BSSID_SET;
1969 if (netif_running(sdata->dev)) {
1970 if (ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID)) {
1971 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
1972 "the low-level driver\n", sdata->dev->name);
1976 return ieee80211_sta_commit(sdata);
1979 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
1980 const char *ie, size_t len)
1982 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1984 kfree(ifmgd->extra_ie);
1986 ifmgd->extra_ie = NULL;
1987 ifmgd->extra_ie_len = 0;
1990 ifmgd->extra_ie = kmalloc(len, GFP_KERNEL);
1991 if (!ifmgd->extra_ie) {
1992 ifmgd->extra_ie_len = 0;
1995 memcpy(ifmgd->extra_ie, ie, len);
1996 ifmgd->extra_ie_len = len;
2000 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2002 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2003 sdata->dev->name, reason);
2005 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2008 ieee80211_set_disassoc(sdata, true, true, reason);
2012 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2014 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2016 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2017 sdata->dev->name, reason);
2019 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2022 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED))
2025 ieee80211_set_disassoc(sdata, false, true, reason);
2029 /* scan finished notification */
2030 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2032 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2034 /* Restart STA timers */
2036 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2037 ieee80211_restart_sta_timer(sdata);
2041 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
2043 struct ieee80211_local *local =
2044 container_of(work, struct ieee80211_local,
2045 dynamic_ps_disable_work);
2047 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2048 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2049 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2052 ieee80211_wake_queues_by_reason(&local->hw,
2053 IEEE80211_QUEUE_STOP_REASON_PS);
2056 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
2058 struct ieee80211_local *local =
2059 container_of(work, struct ieee80211_local,
2060 dynamic_ps_enable_work);
2061 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2063 if (local->hw.conf.flags & IEEE80211_CONF_PS)
2066 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
2067 ieee80211_send_nullfunc(local, sdata, 1);
2069 local->hw.conf.flags |= IEEE80211_CONF_PS;
2070 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2073 void ieee80211_dynamic_ps_timer(unsigned long data)
2075 struct ieee80211_local *local = (void *) data;
2077 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
2080 void ieee80211_send_nullfunc(struct ieee80211_local *local,
2081 struct ieee80211_sub_if_data *sdata,
2084 struct sk_buff *skb;
2085 struct ieee80211_hdr *nullfunc;
2088 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2091 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
2093 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
2094 "frame\n", sdata->dev->name);
2097 skb_reserve(skb, local->hw.extra_tx_headroom);
2099 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
2100 memset(nullfunc, 0, 24);
2101 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
2102 IEEE80211_FCTL_TODS);
2104 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
2105 nullfunc->frame_control = fc;
2106 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2107 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
2108 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
2110 ieee80211_tx_skb(sdata, skb, 0);