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 <linux/pm_qos_params.h>
21 #include <linux/crc32.h>
22 #include <net/mac80211.h>
23 #include <asm/unaligned.h>
25 #include "ieee80211_i.h"
26 #include "driver-ops.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_IDLE_TIME (60 * HZ)
37 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
40 static int ecw2cw(int ecw)
42 return (1 << ecw) - 1;
45 static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
49 pos = bss->cbss.information_elements;
52 end = pos + bss->cbss.len_information_elements;
54 while (pos + 1 < end) {
55 if (pos + 2 + pos[1] > end)
65 static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
66 struct ieee80211_supported_band *sband,
72 for (i = 0; i < bss->supp_rates_len; i++) {
73 int rate = (bss->supp_rates[i] & 0x7F) * 5;
75 for (j = 0; j < sband->n_bitrates; j++)
76 if (sband->bitrates[j].bitrate == rate) {
87 * ieee80211_enable_ht should be called only after the operating band
88 * has been determined as ht configuration depends on the hw's
89 * HT abilities for a specific band.
91 static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
92 struct ieee80211_ht_info *hti,
95 struct ieee80211_local *local = sdata->local;
96 struct ieee80211_supported_band *sband;
97 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
98 struct ieee80211_bss_ht_conf ht;
101 bool enable_ht = true, ht_changed;
102 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
104 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
106 memset(&ht, 0, sizeof(ht));
108 /* HT is not supported */
109 if (!sband->ht_cap.ht_supported)
112 /* check that channel matches the right operating channel */
113 if (local->hw.conf.channel->center_freq !=
114 ieee80211_channel_to_frequency(hti->control_chan))
118 channel_type = NL80211_CHAN_HT20;
120 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
121 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
122 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
123 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
124 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
125 channel_type = NL80211_CHAN_HT40PLUS;
127 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
128 channel_type = NL80211_CHAN_HT40MINUS;
134 ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
135 channel_type != local->hw.conf.channel_type;
137 local->oper_channel_type = channel_type;
140 /* channel_type change automatically detected */
141 ieee80211_hw_config(local, 0);
145 sta = sta_info_get(local, ifmgd->bssid);
147 rate_control_rate_update(local, sband, sta,
148 IEEE80211_RC_HT_CHANGED);
158 ht.operation_mode = le16_to_cpu(hti->operation_mode);
160 /* if bss configuration changed store the new one */
161 if (memcmp(&sdata->vif.bss_conf.ht, &ht, sizeof(ht))) {
162 changed |= BSS_CHANGED_HT;
163 sdata->vif.bss_conf.ht = ht;
169 /* frame sending functions */
171 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
173 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
174 struct ieee80211_local *local = sdata->local;
176 struct ieee80211_mgmt *mgmt;
177 u8 *pos, *ies, *ht_ie;
178 int i, len, count, rates_len, supp_rates_len;
180 struct ieee80211_bss *bss;
182 struct ieee80211_supported_band *sband;
185 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
186 sizeof(*mgmt) + 200 + ifmgd->extra_ie_len +
189 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
190 "frame\n", sdata->dev->name);
193 skb_reserve(skb, local->hw.extra_tx_headroom);
195 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
197 capab = ifmgd->capab;
199 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
200 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
201 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
202 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
203 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
206 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
207 local->hw.conf.channel->center_freq,
208 ifmgd->ssid, ifmgd->ssid_len);
210 if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
211 capab |= WLAN_CAPABILITY_PRIVACY;
215 /* get all rates supported by the device and the AP as
216 * some APs don't like getting a superset of their rates
217 * in the association request (e.g. D-Link DAP 1353 in
219 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
221 if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
222 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
223 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
225 ieee80211_rx_bss_put(local, bss);
228 rates_len = sband->n_bitrates;
231 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
233 memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
234 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
235 memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
237 if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) {
239 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
240 IEEE80211_STYPE_REASSOC_REQ);
241 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
242 mgmt->u.reassoc_req.listen_interval =
243 cpu_to_le16(local->hw.conf.listen_interval);
244 memcpy(mgmt->u.reassoc_req.current_ap, ifmgd->prev_bssid,
248 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
249 IEEE80211_STYPE_ASSOC_REQ);
250 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
251 mgmt->u.assoc_req.listen_interval =
252 cpu_to_le16(local->hw.conf.listen_interval);
256 ies = pos = skb_put(skb, 2 + ifmgd->ssid_len);
257 *pos++ = WLAN_EID_SSID;
258 *pos++ = ifmgd->ssid_len;
259 memcpy(pos, ifmgd->ssid, ifmgd->ssid_len);
261 /* add all rates which were marked to be used above */
262 supp_rates_len = rates_len;
263 if (supp_rates_len > 8)
266 len = sband->n_bitrates;
267 pos = skb_put(skb, supp_rates_len + 2);
268 *pos++ = WLAN_EID_SUPP_RATES;
269 *pos++ = supp_rates_len;
272 for (i = 0; i < sband->n_bitrates; i++) {
273 if (BIT(i) & rates) {
274 int rate = sband->bitrates[i].bitrate;
275 *pos++ = (u8) (rate / 5);
281 if (rates_len > count) {
282 pos = skb_put(skb, rates_len - count + 2);
283 *pos++ = WLAN_EID_EXT_SUPP_RATES;
284 *pos++ = rates_len - count;
286 for (i++; i < sband->n_bitrates; i++) {
287 if (BIT(i) & rates) {
288 int rate = sband->bitrates[i].bitrate;
289 *pos++ = (u8) (rate / 5);
294 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
295 /* 1. power capabilities */
296 pos = skb_put(skb, 4);
297 *pos++ = WLAN_EID_PWR_CAPABILITY;
299 *pos++ = 0; /* min tx power */
300 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
302 /* 2. supported channels */
303 /* TODO: get this in reg domain format */
304 pos = skb_put(skb, 2 * sband->n_channels + 2);
305 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
306 *pos++ = 2 * sband->n_channels;
307 for (i = 0; i < sband->n_channels; i++) {
308 *pos++ = ieee80211_frequency_to_channel(
309 sband->channels[i].center_freq);
310 *pos++ = 1; /* one channel in the subband*/
314 if (ifmgd->extra_ie) {
315 pos = skb_put(skb, ifmgd->extra_ie_len);
316 memcpy(pos, ifmgd->extra_ie, ifmgd->extra_ie_len);
319 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
320 pos = skb_put(skb, 9);
321 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
322 *pos++ = 7; /* len */
323 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
326 *pos++ = 2; /* WME */
327 *pos++ = 0; /* WME info */
328 *pos++ = 1; /* WME ver */
332 /* wmm support is a must to HT */
334 * IEEE802.11n does not allow TKIP/WEP as pairwise
335 * ciphers in HT mode. We still associate in non-ht
336 * mode (11a/b/g) if any one of these ciphers is
337 * configured as pairwise.
339 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
340 sband->ht_cap.ht_supported &&
341 (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) &&
342 ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
343 (!(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))) {
344 struct ieee80211_ht_info *ht_info =
345 (struct ieee80211_ht_info *)(ht_ie + 2);
346 u16 cap = sband->ht_cap.cap;
348 u32 flags = local->hw.conf.channel->flags;
350 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
351 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
352 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
353 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
354 cap &= ~IEEE80211_HT_CAP_SGI_40;
357 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
358 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
359 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
360 cap &= ~IEEE80211_HT_CAP_SGI_40;
365 tmp = cpu_to_le16(cap);
366 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
367 *pos++ = WLAN_EID_HT_CAPABILITY;
368 *pos++ = sizeof(struct ieee80211_ht_cap);
369 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
370 memcpy(pos, &tmp, sizeof(u16));
372 /* TODO: needs a define here for << 2 */
373 *pos++ = sband->ht_cap.ampdu_factor |
374 (sband->ht_cap.ampdu_density << 2);
375 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
378 kfree(ifmgd->assocreq_ies);
379 ifmgd->assocreq_ies_len = (skb->data + skb->len) - ies;
380 ifmgd->assocreq_ies = kmalloc(ifmgd->assocreq_ies_len, GFP_KERNEL);
381 if (ifmgd->assocreq_ies)
382 memcpy(ifmgd->assocreq_ies, ies, ifmgd->assocreq_ies_len);
384 ieee80211_tx_skb(sdata, skb, 0);
388 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
389 u16 stype, u16 reason)
391 struct ieee80211_local *local = sdata->local;
392 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
394 struct ieee80211_mgmt *mgmt;
396 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
398 printk(KERN_DEBUG "%s: failed to allocate buffer for "
399 "deauth/disassoc frame\n", sdata->dev->name);
402 skb_reserve(skb, local->hw.extra_tx_headroom);
404 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
406 memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
407 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
408 memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
409 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
411 /* u.deauth.reason_code == u.disassoc.reason_code */
412 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
414 if (stype == IEEE80211_STYPE_DEAUTH)
415 cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, skb->len);
417 cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, skb->len);
418 ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
421 void ieee80211_send_pspoll(struct ieee80211_local *local,
422 struct ieee80211_sub_if_data *sdata)
424 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
425 struct ieee80211_pspoll *pspoll;
429 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
431 printk(KERN_DEBUG "%s: failed to allocate buffer for "
432 "pspoll frame\n", sdata->dev->name);
435 skb_reserve(skb, local->hw.extra_tx_headroom);
437 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
438 memset(pspoll, 0, sizeof(*pspoll));
439 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
440 pspoll->frame_control = cpu_to_le16(fc);
441 pspoll->aid = cpu_to_le16(ifmgd->aid);
443 /* aid in PS-Poll has its two MSBs each set to 1 */
444 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
446 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
447 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
449 ieee80211_tx_skb(sdata, skb, 0);
452 void ieee80211_send_nullfunc(struct ieee80211_local *local,
453 struct ieee80211_sub_if_data *sdata,
457 struct ieee80211_hdr *nullfunc;
460 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
463 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
465 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
466 "frame\n", sdata->dev->name);
469 skb_reserve(skb, local->hw.extra_tx_headroom);
471 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
472 memset(nullfunc, 0, 24);
473 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
474 IEEE80211_FCTL_TODS);
476 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
477 nullfunc->frame_control = fc;
478 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
479 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
480 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
482 ieee80211_tx_skb(sdata, skb, 0);
486 static void ieee80211_enable_ps(struct ieee80211_local *local,
487 struct ieee80211_sub_if_data *sdata)
489 struct ieee80211_conf *conf = &local->hw.conf;
492 * If we are scanning right now then the parameters will
493 * take effect when scan finishes.
495 if (local->hw_scanning || local->sw_scanning)
498 if (conf->dynamic_ps_timeout > 0 &&
499 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
500 mod_timer(&local->dynamic_ps_timer, jiffies +
501 msecs_to_jiffies(conf->dynamic_ps_timeout));
503 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
504 ieee80211_send_nullfunc(local, sdata, 1);
505 conf->flags |= IEEE80211_CONF_PS;
506 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
510 static void ieee80211_change_ps(struct ieee80211_local *local)
512 struct ieee80211_conf *conf = &local->hw.conf;
514 if (local->ps_sdata) {
515 if (!(local->ps_sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED))
518 ieee80211_enable_ps(local, local->ps_sdata);
519 } else if (conf->flags & IEEE80211_CONF_PS) {
520 conf->flags &= ~IEEE80211_CONF_PS;
521 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
522 del_timer_sync(&local->dynamic_ps_timer);
523 cancel_work_sync(&local->dynamic_ps_enable_work);
527 /* need to hold RTNL or interface lock */
528 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
530 struct ieee80211_sub_if_data *sdata, *found = NULL;
533 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
534 local->ps_sdata = NULL;
538 list_for_each_entry(sdata, &local->interfaces, list) {
539 if (!netif_running(sdata->dev))
541 if (sdata->vif.type != NL80211_IFTYPE_STATION)
547 if (count == 1 && found->u.mgd.powersave) {
551 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
553 beaconint_us = ieee80211_tu_to_usec(
554 found->vif.bss_conf.beacon_int);
556 if (beaconint_us > latency) {
557 local->ps_sdata = NULL;
559 u8 dtimper = found->vif.bss_conf.dtim_period;
563 maxslp = min_t(int, dtimper,
564 latency / beaconint_us);
566 local->hw.conf.max_sleep_period = maxslp;
567 local->ps_sdata = found;
570 local->ps_sdata = NULL;
573 ieee80211_change_ps(local);
576 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
578 struct ieee80211_local *local =
579 container_of(work, struct ieee80211_local,
580 dynamic_ps_disable_work);
582 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
583 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
584 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
587 ieee80211_wake_queues_by_reason(&local->hw,
588 IEEE80211_QUEUE_STOP_REASON_PS);
591 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
593 struct ieee80211_local *local =
594 container_of(work, struct ieee80211_local,
595 dynamic_ps_enable_work);
596 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
598 /* can only happen when PS was just disabled anyway */
602 if (local->hw.conf.flags & IEEE80211_CONF_PS)
605 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
606 ieee80211_send_nullfunc(local, sdata, 1);
608 local->hw.conf.flags |= IEEE80211_CONF_PS;
609 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
612 void ieee80211_dynamic_ps_timer(unsigned long data)
614 struct ieee80211_local *local = (void *) data;
616 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
620 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
621 struct ieee80211_if_managed *ifmgd,
622 u8 *wmm_param, size_t wmm_param_len)
624 struct ieee80211_tx_queue_params params;
629 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
635 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
637 count = wmm_param[6] & 0x0f;
638 if (count == ifmgd->wmm_last_param_set)
640 ifmgd->wmm_last_param_set = count;
643 left = wmm_param_len - 8;
645 memset(¶ms, 0, sizeof(params));
648 for (; left >= 4; left -= 4, pos += 4) {
649 int aci = (pos[0] >> 5) & 0x03;
650 int acm = (pos[0] >> 4) & 0x01;
657 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
662 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
667 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
673 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
677 params.aifs = pos[0] & 0x0f;
678 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
679 params.cw_min = ecw2cw(pos[1] & 0x0f);
680 params.txop = get_unaligned_le16(pos + 2);
681 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
682 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
683 "cWmin=%d cWmax=%d txop=%d\n",
684 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
685 params.cw_max, params.txop);
687 if (drv_conf_tx(local, queue, ¶ms) && local->ops->conf_tx)
688 printk(KERN_DEBUG "%s: failed to set TX queue "
689 "parameters for queue %d\n", local->mdev->name,
694 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
695 u16 capab, bool erp_valid, u8 erp)
697 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
698 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
699 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
703 bool use_short_preamble;
707 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
708 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
710 use_protection = false;
711 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
714 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
716 if (use_protection != bss_conf->use_cts_prot) {
717 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
718 if (net_ratelimit()) {
719 printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
721 use_protection ? "enabled" : "disabled",
725 bss_conf->use_cts_prot = use_protection;
726 changed |= BSS_CHANGED_ERP_CTS_PROT;
729 if (use_short_preamble != bss_conf->use_short_preamble) {
730 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
731 if (net_ratelimit()) {
732 printk(KERN_DEBUG "%s: switched to %s barker preamble"
735 use_short_preamble ? "short" : "long",
739 bss_conf->use_short_preamble = use_short_preamble;
740 changed |= BSS_CHANGED_ERP_PREAMBLE;
743 if (use_short_slot != bss_conf->use_short_slot) {
744 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
745 if (net_ratelimit()) {
746 printk(KERN_DEBUG "%s: switched to %s slot time"
749 use_short_slot ? "short" : "long",
753 bss_conf->use_short_slot = use_short_slot;
754 changed |= BSS_CHANGED_ERP_SLOT;
760 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata)
762 union iwreq_data wrqu;
764 memset(&wrqu, 0, sizeof(wrqu));
765 if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED)
766 memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN);
767 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
768 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
771 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata)
773 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
777 union iwreq_data wrqu;
779 if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies)
782 buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len +
783 ifmgd->assocresp_ies_len), GFP_KERNEL);
787 len = sprintf(buf, "ASSOCINFO(");
788 if (ifmgd->assocreq_ies) {
789 len += sprintf(buf + len, "ReqIEs=");
790 for (i = 0; i < ifmgd->assocreq_ies_len; i++) {
791 len += sprintf(buf + len, "%02x",
792 ifmgd->assocreq_ies[i]);
795 if (ifmgd->assocresp_ies) {
796 if (ifmgd->assocreq_ies)
797 len += sprintf(buf + len, " ");
798 len += sprintf(buf + len, "RespIEs=");
799 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
800 len += sprintf(buf + len, "%02x",
801 ifmgd->assocresp_ies[i]);
804 len += sprintf(buf + len, ")");
806 if (len > IW_CUSTOM_MAX) {
807 len = sprintf(buf, "ASSOCRESPIE=");
808 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
809 len += sprintf(buf + len, "%02x",
810 ifmgd->assocresp_ies[i]);
814 if (len <= IW_CUSTOM_MAX) {
815 memset(&wrqu, 0, sizeof(wrqu));
816 wrqu.data.length = len;
817 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
824 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
825 u32 bss_info_changed)
827 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
828 struct ieee80211_local *local = sdata->local;
829 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
831 struct ieee80211_bss *bss;
833 bss_info_changed |= BSS_CHANGED_ASSOC;
834 ifmgd->flags |= IEEE80211_STA_ASSOCIATED;
836 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
837 conf->channel->center_freq,
838 ifmgd->ssid, ifmgd->ssid_len);
840 /* set timing information */
841 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
842 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
843 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
845 bss_info_changed |= BSS_CHANGED_BEACON_INT;
846 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
847 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
849 cfg80211_hold_bss(&bss->cbss);
851 ieee80211_rx_bss_put(local, bss);
854 ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET;
855 memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN);
856 ieee80211_sta_send_associnfo(sdata);
858 ifmgd->last_probe = jiffies;
859 ieee80211_led_assoc(local, 1);
861 sdata->vif.bss_conf.assoc = 1;
863 * For now just always ask the driver to update the basic rateset
864 * when we have associated, we aren't checking whether it actually
867 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
868 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
870 /* will be same as sdata */
871 if (local->ps_sdata) {
872 mutex_lock(&local->iflist_mtx);
873 ieee80211_recalc_ps(local, -1);
874 mutex_unlock(&local->iflist_mtx);
877 netif_tx_start_all_queues(sdata->dev);
878 netif_carrier_on(sdata->dev);
880 ieee80211_sta_send_apinfo(sdata);
883 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata)
885 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
886 struct ieee80211_local *local = sdata->local;
888 ifmgd->direct_probe_tries++;
889 if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
890 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
891 sdata->dev->name, ifmgd->bssid);
892 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
893 cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid);
896 * Most likely AP is not in the range so remove the
897 * bss information associated to the AP
899 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
900 sdata->local->hw.conf.channel->center_freq,
901 ifmgd->ssid, ifmgd->ssid_len);
904 * We might have a pending scan which had no chance to run yet
905 * due to state == IEEE80211_STA_MLME_DIRECT_PROBE.
906 * Hence, queue the STAs work again
908 queue_work(local->hw.workqueue, &ifmgd->work);
912 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
913 sdata->dev->name, ifmgd->bssid,
914 ifmgd->direct_probe_tries);
916 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
918 /* Direct probe is sent to broadcast address as some APs
919 * will not answer to direct packet in unassociated state.
921 ieee80211_send_probe_req(sdata, NULL,
922 ifmgd->ssid, ifmgd->ssid_len, NULL, 0);
924 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
928 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata)
930 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
931 struct ieee80211_local *local = sdata->local;
936 if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
937 printk(KERN_DEBUG "%s: authentication with AP %pM"
939 sdata->dev->name, ifmgd->bssid);
940 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
941 cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid);
942 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
943 sdata->local->hw.conf.channel->center_freq,
944 ifmgd->ssid, ifmgd->ssid_len);
947 * We might have a pending scan which had no chance to run yet
948 * due to state == IEEE80211_STA_MLME_AUTHENTICATE.
949 * Hence, queue the STAs work again
951 queue_work(local->hw.workqueue, &ifmgd->work);
955 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
956 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
957 sdata->dev->name, ifmgd->bssid);
959 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
960 ies = ifmgd->sme_auth_ie;
961 ies_len = ifmgd->sme_auth_ie_len;
966 ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ies, ies_len,
968 ifmgd->auth_transaction = 2;
970 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
974 * The disassoc 'reason' argument can be either our own reason
975 * if self disconnected or a reason code from the AP.
977 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
978 bool deauth, bool self_disconnected,
981 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
982 struct ieee80211_local *local = sdata->local;
983 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
984 struct ieee80211_bss *bss;
985 struct sta_info *sta;
986 u32 changed = 0, config_changed = 0;
990 sta = sta_info_get(local, ifmgd->bssid);
997 ifmgd->direct_probe_tries = 0;
998 ifmgd->auth_tries = 0;
1000 ifmgd->assoc_scan_tries = 0;
1001 ifmgd->assoc_tries = 0;
1003 netif_tx_stop_all_queues(sdata->dev);
1004 netif_carrier_off(sdata->dev);
1006 ieee80211_sta_tear_down_BA_sessions(sta);
1008 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
1009 conf->channel->center_freq,
1010 ifmgd->ssid, ifmgd->ssid_len);
1013 cfg80211_unhold_bss(&bss->cbss);
1014 ieee80211_rx_bss_put(local, bss);
1017 if (self_disconnected) {
1019 ieee80211_send_deauth_disassoc(sdata,
1020 IEEE80211_STYPE_DEAUTH, reason);
1022 ieee80211_send_deauth_disassoc(sdata,
1023 IEEE80211_STYPE_DISASSOC, reason);
1026 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
1027 changed |= ieee80211_reset_erp_info(sdata);
1029 ieee80211_led_assoc(local, 0);
1030 changed |= BSS_CHANGED_ASSOC;
1031 sdata->vif.bss_conf.assoc = false;
1033 ieee80211_sta_send_apinfo(sdata);
1035 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
1036 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1037 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1038 sdata->local->hw.conf.channel->center_freq,
1039 ifmgd->ssid, ifmgd->ssid_len);
1044 /* channel(_type) changes are handled by ieee80211_hw_config */
1045 local->oper_channel_type = NL80211_CHAN_NO_HT;
1047 local->power_constr_level = 0;
1049 del_timer_sync(&local->dynamic_ps_timer);
1050 cancel_work_sync(&local->dynamic_ps_enable_work);
1052 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1053 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1054 config_changed |= IEEE80211_CONF_CHANGE_PS;
1057 ieee80211_hw_config(local, config_changed);
1058 ieee80211_bss_info_change_notify(sdata, changed);
1062 sta = sta_info_get(local, ifmgd->bssid);
1068 sta_info_unlink(&sta);
1072 sta_info_destroy(sta);
1075 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
1077 if (!sdata || !sdata->default_key ||
1078 sdata->default_key->conf.alg != ALG_WEP)
1083 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata)
1085 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1086 struct ieee80211_local *local = sdata->local;
1087 struct ieee80211_bss *bss;
1090 int privacy_invoked;
1092 if (!ifmgd || (ifmgd->flags & IEEE80211_STA_EXT_SME))
1095 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
1096 local->hw.conf.channel->center_freq,
1097 ifmgd->ssid, ifmgd->ssid_len);
1101 bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY);
1102 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
1103 privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED);
1105 ieee80211_rx_bss_put(local, bss);
1107 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
1113 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata)
1115 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1116 struct ieee80211_local *local = sdata->local;
1118 ifmgd->assoc_tries++;
1119 if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
1120 printk(KERN_DEBUG "%s: association with AP %pM"
1122 sdata->dev->name, ifmgd->bssid);
1123 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1124 cfg80211_send_assoc_timeout(sdata->dev, ifmgd->bssid);
1125 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1126 sdata->local->hw.conf.channel->center_freq,
1127 ifmgd->ssid, ifmgd->ssid_len);
1129 * We might have a pending scan which had no chance to run yet
1130 * due to state == IEEE80211_STA_MLME_ASSOCIATE.
1131 * Hence, queue the STAs work again
1133 queue_work(local->hw.workqueue, &ifmgd->work);
1137 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1138 printk(KERN_DEBUG "%s: associate with AP %pM\n",
1139 sdata->dev->name, ifmgd->bssid);
1140 if (ieee80211_privacy_mismatch(sdata)) {
1141 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
1142 "mixed-cell disabled - abort association\n", sdata->dev->name);
1143 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1147 ieee80211_send_assoc(sdata);
1149 mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1152 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1153 struct ieee80211_hdr *hdr)
1156 * We can postpone the mgd.timer whenever receiving unicast frames
1157 * from AP because we know that the connection is working both ways
1158 * at that time. But multicast frames (and hence also beacons) must
1159 * be ignored here, because we need to trigger the timer during
1160 * data idle periods for sending the periodical probe request to
1163 if (!is_multicast_ether_addr(hdr->addr1))
1164 mod_timer(&sdata->u.mgd.timer,
1165 jiffies + IEEE80211_MONITORING_INTERVAL);
1168 void ieee80211_beacon_loss_work(struct work_struct *work)
1170 struct ieee80211_sub_if_data *sdata =
1171 container_of(work, struct ieee80211_sub_if_data,
1172 u.mgd.beacon_loss_work);
1173 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1175 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1176 if (net_ratelimit()) {
1177 printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM "
1178 "- sending probe request\n", sdata->dev->name,
1179 sdata->u.mgd.bssid);
1183 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1184 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1185 ifmgd->ssid_len, NULL, 0);
1187 mod_timer(&ifmgd->timer, jiffies + IEEE80211_MONITORING_INTERVAL);
1190 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1192 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1194 queue_work(sdata->local->hw.workqueue,
1195 &sdata->u.mgd.beacon_loss_work);
1197 EXPORT_SYMBOL(ieee80211_beacon_loss);
1199 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
1201 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1202 struct ieee80211_local *local = sdata->local;
1203 struct sta_info *sta;
1204 bool disassoc = false;
1206 /* TODO: start monitoring current AP signal quality and number of
1207 * missed beacons. Scan other channels every now and then and search
1208 * for better APs. */
1209 /* TODO: remove expired BSSes */
1211 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED;
1215 sta = sta_info_get(local, ifmgd->bssid);
1217 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
1218 sdata->dev->name, ifmgd->bssid);
1223 if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) &&
1224 time_after(jiffies, sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
1225 printk(KERN_DEBUG "%s: no probe response from AP %pM "
1226 "- disassociating\n",
1227 sdata->dev->name, ifmgd->bssid);
1229 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1234 * Beacon filtering is only enabled with power save and then the
1235 * stack should not check for beacon loss.
1237 if (!((local->hw.flags & IEEE80211_HW_BEACON_FILTER) &&
1238 (local->hw.conf.flags & IEEE80211_CONF_PS)) &&
1240 ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) {
1241 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1242 if (net_ratelimit()) {
1243 printk(KERN_DEBUG "%s: beacon loss from AP %pM "
1244 "- sending probe request\n",
1245 sdata->dev->name, ifmgd->bssid);
1248 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1249 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1250 ifmgd->ssid_len, NULL, 0);
1255 if (time_after(jiffies, sta->last_rx + IEEE80211_PROBE_IDLE_TIME)) {
1256 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1257 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1258 ifmgd->ssid_len, NULL, 0);
1265 ieee80211_set_disassoc(sdata, true, true,
1266 WLAN_REASON_PREV_AUTH_NOT_VALID);
1268 mod_timer(&ifmgd->timer, jiffies +
1269 IEEE80211_MONITORING_INTERVAL);
1273 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata)
1275 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1277 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1278 ifmgd->flags |= IEEE80211_STA_AUTHENTICATED;
1279 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1280 /* Wait for SME to request association */
1281 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1283 ieee80211_associate(sdata);
1287 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1288 struct ieee80211_mgmt *mgmt,
1292 struct ieee802_11_elems elems;
1294 pos = mgmt->u.auth.variable;
1295 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1296 if (!elems.challenge)
1298 ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg,
1299 elems.challenge - 2, elems.challenge_len + 2,
1300 sdata->u.mgd.bssid, 1);
1301 sdata->u.mgd.auth_transaction = 4;
1304 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1305 struct ieee80211_mgmt *mgmt,
1308 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1309 u16 auth_alg, auth_transaction, status_code;
1311 if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE)
1317 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1320 if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1323 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1324 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1325 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1327 if (auth_alg != ifmgd->auth_alg ||
1328 auth_transaction != ifmgd->auth_transaction)
1331 if (status_code != WLAN_STATUS_SUCCESS) {
1332 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1334 const int num_algs = ARRAY_SIZE(algs);
1336 algs[0] = algs[1] = algs[2] = 0xff;
1337 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1338 algs[0] = WLAN_AUTH_OPEN;
1339 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1340 algs[1] = WLAN_AUTH_SHARED_KEY;
1341 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1342 algs[2] = WLAN_AUTH_LEAP;
1343 if (ifmgd->auth_alg == WLAN_AUTH_OPEN)
1345 else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY)
1349 for (i = 0; i < num_algs; i++) {
1351 if (pos >= num_algs)
1353 if (algs[pos] == ifmgd->auth_alg ||
1356 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1357 !ieee80211_sta_wep_configured(sdata))
1359 ifmgd->auth_alg = algs[pos];
1366 switch (ifmgd->auth_alg) {
1367 case WLAN_AUTH_OPEN:
1368 case WLAN_AUTH_LEAP:
1370 ieee80211_auth_completed(sdata);
1371 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1373 case WLAN_AUTH_SHARED_KEY:
1374 if (ifmgd->auth_transaction == 4) {
1375 ieee80211_auth_completed(sdata);
1376 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1378 ieee80211_auth_challenge(sdata, mgmt, len);
1384 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1385 struct ieee80211_mgmt *mgmt,
1388 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1394 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1397 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1399 if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED)
1400 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1401 sdata->dev->name, reason_code);
1403 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1404 (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1405 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE ||
1406 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) {
1407 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1408 mod_timer(&ifmgd->timer, jiffies +
1409 IEEE80211_RETRY_AUTH_INTERVAL);
1412 ieee80211_set_disassoc(sdata, true, false, 0);
1413 ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED;
1414 cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, len);
1418 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1419 struct ieee80211_mgmt *mgmt,
1422 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1428 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1431 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1433 if (ifmgd->flags & IEEE80211_STA_ASSOCIATED)
1434 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1435 sdata->dev->name, reason_code);
1437 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1438 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1439 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1440 mod_timer(&ifmgd->timer, jiffies +
1441 IEEE80211_RETRY_AUTH_INTERVAL);
1444 ieee80211_set_disassoc(sdata, false, false, reason_code);
1445 cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, len);
1449 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1450 struct ieee80211_mgmt *mgmt,
1454 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1455 struct ieee80211_local *local = sdata->local;
1456 struct ieee80211_supported_band *sband;
1457 struct sta_info *sta;
1458 u32 rates, basic_rates;
1459 u16 capab_info, status_code, aid;
1460 struct ieee802_11_elems elems;
1461 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1465 bool have_higher_than_11mbit = false, newsta = false;
1466 u16 ap_ht_cap_flags;
1468 /* AssocResp and ReassocResp have identical structure, so process both
1469 * of them in this function. */
1471 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1477 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1480 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1481 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1482 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1484 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1485 "status=%d aid=%d)\n",
1486 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1487 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1489 pos = mgmt->u.assoc_resp.variable;
1490 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1492 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1493 elems.timeout_int && elems.timeout_int_len == 5 &&
1494 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1496 tu = get_unaligned_le32(elems.timeout_int + 1);
1497 ms = tu * 1024 / 1000;
1498 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1499 "comeback duration %u TU (%u ms)\n",
1500 sdata->dev->name, tu, ms);
1501 if (ms > IEEE80211_ASSOC_TIMEOUT)
1502 mod_timer(&ifmgd->timer,
1503 jiffies + msecs_to_jiffies(ms));
1507 if (status_code != WLAN_STATUS_SUCCESS) {
1508 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1509 sdata->dev->name, status_code);
1510 /* if this was a reassociation, ensure we try a "full"
1511 * association next time. This works around some broken APs
1512 * which do not correctly reject reassociation requests. */
1513 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1514 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1515 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1516 /* Wait for SME to decide what to do next */
1517 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1522 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1523 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1524 "set\n", sdata->dev->name, aid);
1525 aid &= ~(BIT(15) | BIT(14));
1527 if (!elems.supp_rates) {
1528 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1533 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1535 ifmgd->ap_capab = capab_info;
1537 kfree(ifmgd->assocresp_ies);
1538 ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1539 ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL);
1540 if (ifmgd->assocresp_ies)
1541 memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len);
1545 /* Add STA entry for the AP */
1546 sta = sta_info_get(local, ifmgd->bssid);
1550 sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC);
1552 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1553 " the AP\n", sdata->dev->name);
1558 /* update new sta with its last rx activity */
1559 sta->last_rx = jiffies;
1563 * FIXME: Do we really need to update the sta_info's information here?
1564 * We already know about the AP (we found it in our list) so it
1565 * should already be filled with the right info, no?
1566 * As is stands, all this is racy because typically we assume
1567 * the information that is filled in here (except flags) doesn't
1568 * change while a STA structure is alive. As such, it should move
1569 * to between the sta_info_alloc() and sta_info_insert() above.
1572 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1573 WLAN_STA_AUTHORIZED);
1577 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1579 for (i = 0; i < elems.supp_rates_len; i++) {
1580 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1581 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1584 have_higher_than_11mbit = true;
1586 for (j = 0; j < sband->n_bitrates; j++) {
1587 if (sband->bitrates[j].bitrate == rate) {
1590 basic_rates |= BIT(j);
1596 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1597 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1598 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1601 have_higher_than_11mbit = true;
1603 for (j = 0; j < sband->n_bitrates; j++) {
1604 if (sband->bitrates[j].bitrate == rate) {
1607 basic_rates |= BIT(j);
1613 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1614 sdata->vif.bss_conf.basic_rates = basic_rates;
1616 /* cf. IEEE 802.11 9.2.12 */
1617 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1618 have_higher_than_11mbit)
1619 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1621 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1623 /* If TKIP/WEP is used, no need to parse AP's HT capabilities */
1624 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1625 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1626 elems.ht_cap_elem, &sta->sta.ht_cap);
1628 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1630 rate_control_rate_init(sta);
1632 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1633 set_sta_flags(sta, WLAN_STA_MFP);
1635 if (elems.wmm_param)
1636 set_sta_flags(sta, WLAN_STA_WME);
1639 int err = sta_info_insert(sta);
1641 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1642 " the AP (error %d)\n", sdata->dev->name, err);
1650 if (elems.wmm_param)
1651 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1652 elems.wmm_param_len);
1654 if (elems.ht_info_elem && elems.wmm_param &&
1655 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1656 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1657 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1660 /* set AID and assoc capability,
1661 * ieee80211_set_associated() will tell the driver */
1662 bss_conf->aid = aid;
1663 bss_conf->assoc_capability = capab_info;
1664 ieee80211_set_associated(sdata, changed);
1667 * initialise the time of last beacon to be the association time,
1668 * otherwise beacon loss check will trigger immediately
1670 ifmgd->last_beacon = jiffies;
1672 ieee80211_associated(sdata);
1673 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1677 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1678 struct ieee80211_mgmt *mgmt,
1680 struct ieee80211_rx_status *rx_status,
1681 struct ieee802_11_elems *elems,
1684 struct ieee80211_local *local = sdata->local;
1686 struct ieee80211_bss *bss;
1687 struct ieee80211_channel *channel;
1689 if (elems->ds_params && elems->ds_params_len == 1)
1690 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1692 freq = rx_status->freq;
1694 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1696 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1699 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1704 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1705 (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) {
1706 struct ieee80211_channel_sw_ie *sw_elem =
1707 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1708 ieee80211_process_chanswitch(sdata, sw_elem, bss);
1711 ieee80211_rx_bss_put(local, bss);
1715 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1716 struct ieee80211_mgmt *mgmt,
1718 struct ieee80211_rx_status *rx_status)
1720 struct ieee80211_if_managed *ifmgd;
1722 struct ieee802_11_elems elems;
1724 ifmgd = &sdata->u.mgd;
1726 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1727 return; /* ignore ProbeResp to foreign address */
1729 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1733 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1736 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1738 /* direct probe may be part of the association flow */
1739 if (ifmgd->state == IEEE80211_STA_MLME_DIRECT_PROBE) {
1740 printk(KERN_DEBUG "%s direct probe responded\n",
1742 ieee80211_authenticate(sdata);
1745 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
1746 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1750 * This is the canonical list of information elements we care about,
1751 * the filter code also gives us all changes to the Microsoft OUI
1752 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1754 * We implement beacon filtering in software since that means we can
1755 * avoid processing the frame here and in cfg80211, and userspace
1756 * will not be able to tell whether the hardware supports it or not.
1758 * XXX: This list needs to be dynamic -- userspace needs to be able to
1759 * add items it requires. It also needs to be able to tell us to
1760 * look out for other vendor IEs.
1762 static const u64 care_about_ies =
1763 (1ULL << WLAN_EID_COUNTRY) |
1764 (1ULL << WLAN_EID_ERP_INFO) |
1765 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1766 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1767 (1ULL << WLAN_EID_HT_CAPABILITY) |
1768 (1ULL << WLAN_EID_HT_INFORMATION);
1770 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1771 struct ieee80211_mgmt *mgmt,
1773 struct ieee80211_rx_status *rx_status)
1775 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1777 struct ieee802_11_elems elems;
1778 struct ieee80211_local *local = sdata->local;
1780 bool erp_valid, directed_tim = false;
1784 /* Process beacon from the current BSS */
1785 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1789 if (rx_status->freq != local->hw.conf.channel->center_freq)
1792 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) ||
1793 memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1796 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1797 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1798 len - baselen, &elems,
1799 care_about_ies, ncrc);
1801 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1802 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1805 ncrc = crc32_be(ncrc, (void *)&directed_tim, sizeof(directed_tim));
1807 if (ncrc == ifmgd->beacon_crc)
1809 ifmgd->beacon_crc = ncrc;
1811 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
1813 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1814 elems.wmm_param_len);
1816 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1818 if (local->hw.conf.dynamic_ps_timeout > 0) {
1819 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1820 ieee80211_hw_config(local,
1821 IEEE80211_CONF_CHANGE_PS);
1822 ieee80211_send_nullfunc(local, sdata, 0);
1824 local->pspolling = true;
1827 * Here is assumed that the driver will be
1828 * able to send ps-poll frame and receive a
1829 * response even though power save mode is
1830 * enabled, but some drivers might require
1831 * to disable power save here. This needs
1832 * to be investigated.
1834 ieee80211_send_pspoll(local, sdata);
1839 if (elems.erp_info && elems.erp_info_len >= 1) {
1841 erp_value = elems.erp_info[0];
1845 changed |= ieee80211_handle_bss_capability(sdata,
1846 le16_to_cpu(mgmt->u.beacon.capab_info),
1847 erp_valid, erp_value);
1850 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1851 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) {
1852 struct sta_info *sta;
1853 struct ieee80211_supported_band *sband;
1854 u16 ap_ht_cap_flags;
1858 sta = sta_info_get(local, ifmgd->bssid);
1864 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1866 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1867 elems.ht_cap_elem, &sta->sta.ht_cap);
1869 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1873 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1877 if (elems.country_elem) {
1878 /* Note we are only reviewing this on beacons
1879 * for the BSSID we are associated to */
1880 regulatory_hint_11d(local->hw.wiphy,
1881 elems.country_elem, elems.country_elem_len);
1883 /* TODO: IBSS also needs this */
1884 if (elems.pwr_constr_elem)
1885 ieee80211_handle_pwr_constr(sdata,
1886 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1887 elems.pwr_constr_elem,
1888 elems.pwr_constr_elem_len);
1891 ieee80211_bss_info_change_notify(sdata, changed);
1894 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1895 struct sk_buff *skb,
1896 struct ieee80211_rx_status *rx_status)
1898 struct ieee80211_local *local = sdata->local;
1899 struct ieee80211_mgmt *mgmt;
1903 return RX_DROP_MONITOR;
1905 mgmt = (struct ieee80211_mgmt *) skb->data;
1906 fc = le16_to_cpu(mgmt->frame_control);
1908 switch (fc & IEEE80211_FCTL_STYPE) {
1909 case IEEE80211_STYPE_PROBE_REQ:
1910 case IEEE80211_STYPE_PROBE_RESP:
1911 case IEEE80211_STYPE_BEACON:
1912 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1913 case IEEE80211_STYPE_AUTH:
1914 case IEEE80211_STYPE_ASSOC_RESP:
1915 case IEEE80211_STYPE_REASSOC_RESP:
1916 case IEEE80211_STYPE_DEAUTH:
1917 case IEEE80211_STYPE_DISASSOC:
1918 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1919 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
1923 return RX_DROP_MONITOR;
1926 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1927 struct sk_buff *skb)
1929 struct ieee80211_rx_status *rx_status;
1930 struct ieee80211_mgmt *mgmt;
1933 rx_status = (struct ieee80211_rx_status *) skb->cb;
1934 mgmt = (struct ieee80211_mgmt *) skb->data;
1935 fc = le16_to_cpu(mgmt->frame_control);
1937 switch (fc & IEEE80211_FCTL_STYPE) {
1938 case IEEE80211_STYPE_PROBE_RESP:
1939 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
1942 case IEEE80211_STYPE_BEACON:
1943 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1946 case IEEE80211_STYPE_AUTH:
1947 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
1949 case IEEE80211_STYPE_ASSOC_RESP:
1950 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0);
1952 case IEEE80211_STYPE_REASSOC_RESP:
1953 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1);
1955 case IEEE80211_STYPE_DEAUTH:
1956 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1958 case IEEE80211_STYPE_DISASSOC:
1959 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1966 static void ieee80211_sta_timer(unsigned long data)
1968 struct ieee80211_sub_if_data *sdata =
1969 (struct ieee80211_sub_if_data *) data;
1970 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1971 struct ieee80211_local *local = sdata->local;
1973 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1974 queue_work(local->hw.workqueue, &ifmgd->work);
1977 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata)
1979 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1980 struct ieee80211_local *local = sdata->local;
1982 /* Reset own TSF to allow time synchronization work. */
1983 drv_reset_tsf(local);
1985 ifmgd->wmm_last_param_set = -1; /* allow any WMM update */
1988 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1989 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1990 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1991 ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY;
1992 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1993 ifmgd->auth_alg = WLAN_AUTH_LEAP;
1994 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_FT)
1995 ifmgd->auth_alg = WLAN_AUTH_FT;
1997 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1998 ifmgd->auth_transaction = -1;
1999 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
2000 ifmgd->assoc_scan_tries = 0;
2001 ifmgd->direct_probe_tries = 0;
2002 ifmgd->auth_tries = 0;
2003 ifmgd->assoc_tries = 0;
2004 netif_tx_stop_all_queues(sdata->dev);
2005 netif_carrier_off(sdata->dev);
2008 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata)
2010 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2011 struct ieee80211_local *local = sdata->local;
2012 struct ieee80211_bss *bss;
2013 u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid;
2014 u8 ssid_len = ifmgd->ssid_len;
2015 u16 capa_mask = WLAN_CAPABILITY_ESS;
2016 u16 capa_val = WLAN_CAPABILITY_ESS;
2017 struct ieee80211_channel *chan = local->oper_channel;
2019 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
2020 ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2021 IEEE80211_STA_AUTO_BSSID_SEL |
2022 IEEE80211_STA_AUTO_CHANNEL_SEL)) {
2023 capa_mask |= WLAN_CAPABILITY_PRIVACY;
2024 if (sdata->default_key)
2025 capa_val |= WLAN_CAPABILITY_PRIVACY;
2028 if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2031 if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2034 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) {
2039 bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
2040 bssid, ssid, ssid_len,
2041 capa_mask, capa_val);
2044 ieee80211_set_freq(sdata, bss->cbss.channel->center_freq);
2045 if (!(ifmgd->flags & IEEE80211_STA_SSID_SET))
2046 ieee80211_sta_set_ssid(sdata, bss->ssid,
2048 ieee80211_sta_set_bssid(sdata, bss->cbss.bssid);
2049 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
2051 if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED)
2052 sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED;
2054 sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED;
2056 /* Send out direct probe if no probe resp was received or
2057 * the one we have is outdated
2059 if (!bss->last_probe_resp ||
2060 time_after(jiffies, bss->last_probe_resp
2061 + IEEE80211_SCAN_RESULT_EXPIRE))
2062 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2064 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2066 ieee80211_rx_bss_put(local, bss);
2067 ieee80211_sta_reset_auth(sdata);
2070 if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2073 if (!(ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL))
2074 ssid_len = ifmgd->ssid_len;
2076 ifmgd->assoc_scan_tries++;
2078 ieee80211_request_internal_scan(sdata, ifmgd->ssid,
2081 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2082 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
2084 ifmgd->assoc_scan_tries = 0;
2085 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
2092 static void ieee80211_sta_work(struct work_struct *work)
2094 struct ieee80211_sub_if_data *sdata =
2095 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
2096 struct ieee80211_local *local = sdata->local;
2097 struct ieee80211_if_managed *ifmgd;
2098 struct sk_buff *skb;
2100 if (!netif_running(sdata->dev))
2103 if (local->sw_scanning || local->hw_scanning)
2106 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2108 ifmgd = &sdata->u.mgd;
2110 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
2111 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2113 if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2114 ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2115 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE &&
2116 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) {
2117 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2118 round_jiffies_relative(0));
2122 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) {
2123 if (ieee80211_sta_config_auth(sdata))
2125 clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2126 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request))
2129 switch (ifmgd->state) {
2130 case IEEE80211_STA_MLME_DISABLED:
2132 case IEEE80211_STA_MLME_DIRECT_PROBE:
2133 ieee80211_direct_probe(sdata);
2135 case IEEE80211_STA_MLME_AUTHENTICATE:
2136 ieee80211_authenticate(sdata);
2138 case IEEE80211_STA_MLME_ASSOCIATE:
2139 ieee80211_associate(sdata);
2141 case IEEE80211_STA_MLME_ASSOCIATED:
2142 ieee80211_associated(sdata);
2149 if (ieee80211_privacy_mismatch(sdata)) {
2150 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2151 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2153 ieee80211_set_disassoc(sdata, false, true,
2154 WLAN_REASON_UNSPECIFIED);
2158 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2160 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2162 * Need to update last_beacon to avoid beacon loss
2165 sdata->u.mgd.last_beacon = jiffies;
2168 queue_work(sdata->local->hw.workqueue,
2169 &sdata->u.mgd.work);
2173 /* interface setup */
2174 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2176 struct ieee80211_if_managed *ifmgd;
2179 ifmgd = &sdata->u.mgd;
2180 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
2181 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
2182 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
2183 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
2184 (unsigned long) sdata);
2185 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
2186 (unsigned long) sdata);
2187 skb_queue_head_init(&ifmgd->skb_queue);
2189 ifmgd->capab = WLAN_CAPABILITY_ESS;
2190 ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2191 IEEE80211_AUTH_ALG_SHARED_KEY;
2192 ifmgd->flags |= IEEE80211_STA_CREATE_IBSS |
2193 IEEE80211_STA_AUTO_BSSID_SEL |
2194 IEEE80211_STA_AUTO_CHANNEL_SEL;
2195 if (sdata->local->hw.queues >= 4)
2196 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
2198 hw_flags = sdata->local->hw.flags;
2200 if (hw_flags & IEEE80211_HW_SUPPORTS_PS) {
2201 ifmgd->powersave = CONFIG_MAC80211_DEFAULT_PS_VALUE;
2202 sdata->local->hw.conf.dynamic_ps_timeout = 500;
2206 /* configuration hooks */
2207 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata)
2209 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2210 struct ieee80211_local *local = sdata->local;
2212 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2215 if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET |
2216 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2217 (ifmgd->flags & (IEEE80211_STA_SSID_SET |
2218 IEEE80211_STA_AUTO_SSID_SEL))) {
2220 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)
2221 ieee80211_set_disassoc(sdata, true, true,
2222 WLAN_REASON_DEAUTH_LEAVING);
2224 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) ||
2225 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
2226 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
2227 else if (ifmgd->flags & IEEE80211_STA_EXT_SME)
2228 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2229 queue_work(local->hw.workqueue, &ifmgd->work);
2233 int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata)
2235 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2237 if (ifmgd->ssid_len)
2238 ifmgd->flags |= IEEE80211_STA_SSID_SET;
2240 ifmgd->flags &= ~IEEE80211_STA_SSID_SET;
2245 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2247 struct ieee80211_if_managed *ifmgd;
2249 if (len > IEEE80211_MAX_SSID_LEN)
2252 ifmgd = &sdata->u.mgd;
2254 if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) {
2256 * Do not use reassociation if SSID is changed (different ESS).
2258 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2259 memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid));
2260 memcpy(ifmgd->ssid, ssid, len);
2261 ifmgd->ssid_len = len;
2264 return ieee80211_sta_commit(sdata);
2267 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2269 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2270 memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len);
2271 *len = ifmgd->ssid_len;
2275 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2277 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2279 if (is_valid_ether_addr(bssid)) {
2280 memcpy(ifmgd->bssid, bssid, ETH_ALEN);
2281 ifmgd->flags |= IEEE80211_STA_BSSID_SET;
2283 memset(ifmgd->bssid, 0, ETH_ALEN);
2284 ifmgd->flags &= ~IEEE80211_STA_BSSID_SET;
2287 if (netif_running(sdata->dev))
2288 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2290 return ieee80211_sta_commit(sdata);
2293 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
2294 const char *ie, size_t len)
2296 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2298 kfree(ifmgd->extra_ie);
2300 ifmgd->extra_ie = NULL;
2301 ifmgd->extra_ie_len = 0;
2304 ifmgd->extra_ie = kmalloc(len, GFP_KERNEL);
2305 if (!ifmgd->extra_ie) {
2306 ifmgd->extra_ie_len = 0;
2309 memcpy(ifmgd->extra_ie, ie, len);
2310 ifmgd->extra_ie_len = len;
2314 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2316 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2317 sdata->dev->name, reason);
2319 ieee80211_set_disassoc(sdata, true, true, reason);
2323 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2325 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2327 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2328 sdata->dev->name, reason);
2330 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED))
2333 ieee80211_set_disassoc(sdata, false, true, reason);
2337 /* scan finished notification */
2338 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2340 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2342 /* Restart STA timers */
2344 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2345 ieee80211_restart_sta_timer(sdata);
2349 int ieee80211_max_network_latency(struct notifier_block *nb,
2350 unsigned long data, void *dummy)
2352 s32 latency_usec = (s32) data;
2353 struct ieee80211_local *local =
2354 container_of(nb, struct ieee80211_local,
2355 network_latency_notifier);
2357 mutex_lock(&local->iflist_mtx);
2358 ieee80211_recalc_ps(local, latency_usec);
2359 mutex_unlock(&local->iflist_mtx);