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_WAIT (HZ / 20)
37 #define IEEE80211_PROBE_IDLE_TIME (60 * HZ)
38 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
41 static int ecw2cw(int ecw)
43 return (1 << ecw) - 1;
46 static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
50 pos = bss->cbss.information_elements;
53 end = pos + bss->cbss.len_information_elements;
55 while (pos + 1 < end) {
56 if (pos + 2 + pos[1] > end)
66 static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
67 struct ieee80211_supported_band *sband,
73 for (i = 0; i < bss->supp_rates_len; i++) {
74 int rate = (bss->supp_rates[i] & 0x7F) * 5;
76 for (j = 0; j < sband->n_bitrates; j++)
77 if (sband->bitrates[j].bitrate == rate) {
88 * ieee80211_enable_ht should be called only after the operating band
89 * has been determined as ht configuration depends on the hw's
90 * HT abilities for a specific band.
92 static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
93 struct ieee80211_ht_info *hti,
96 struct ieee80211_local *local = sdata->local;
97 struct ieee80211_supported_band *sband;
98 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
102 bool enable_ht = true, ht_changed;
103 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
105 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
107 /* HT is not supported */
108 if (!sband->ht_cap.ht_supported)
111 /* check that channel matches the right operating channel */
112 if (local->hw.conf.channel->center_freq !=
113 ieee80211_channel_to_frequency(hti->control_chan))
117 channel_type = NL80211_CHAN_HT20;
119 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
120 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
121 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
122 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
123 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
124 channel_type = NL80211_CHAN_HT40PLUS;
126 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
127 channel_type = NL80211_CHAN_HT40MINUS;
133 ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
134 channel_type != local->hw.conf.channel_type;
136 local->oper_channel_type = channel_type;
139 /* channel_type change automatically detected */
140 ieee80211_hw_config(local, 0);
144 sta = sta_info_get(local, ifmgd->bssid);
146 rate_control_rate_update(local, sband, sta,
147 IEEE80211_RC_HT_CHANGED);
156 ht_opmode = le16_to_cpu(hti->operation_mode);
158 /* if bss configuration changed store the new one */
159 if (!sdata->ht_opmode_valid ||
160 sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
161 changed |= BSS_CHANGED_HT;
162 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
163 sdata->ht_opmode_valid = true;
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_HT40PLUS) {
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_HT40MINUS) {
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 ieee80211_recalc_idle(local);
894 cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid);
897 * Most likely AP is not in the range so remove the
898 * bss information associated to the AP
900 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
901 sdata->local->hw.conf.channel->center_freq,
902 ifmgd->ssid, ifmgd->ssid_len);
905 * We might have a pending scan which had no chance to run yet
906 * due to state == IEEE80211_STA_MLME_DIRECT_PROBE.
907 * Hence, queue the STAs work again
909 queue_work(local->hw.workqueue, &ifmgd->work);
913 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
914 sdata->dev->name, ifmgd->bssid,
915 ifmgd->direct_probe_tries);
917 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
919 /* Direct probe is sent to broadcast address as some APs
920 * will not answer to direct packet in unassociated state.
922 ieee80211_send_probe_req(sdata, NULL,
923 ifmgd->ssid, ifmgd->ssid_len, NULL, 0);
925 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
929 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata)
931 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
932 struct ieee80211_local *local = sdata->local;
937 if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
938 printk(KERN_DEBUG "%s: authentication with AP %pM"
940 sdata->dev->name, ifmgd->bssid);
941 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
942 ieee80211_recalc_idle(local);
943 cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid);
944 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
945 sdata->local->hw.conf.channel->center_freq,
946 ifmgd->ssid, ifmgd->ssid_len);
949 * We might have a pending scan which had no chance to run yet
950 * due to state == IEEE80211_STA_MLME_AUTHENTICATE.
951 * Hence, queue the STAs work again
953 queue_work(local->hw.workqueue, &ifmgd->work);
957 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
958 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
959 sdata->dev->name, ifmgd->bssid);
961 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
962 ies = ifmgd->sme_auth_ie;
963 ies_len = ifmgd->sme_auth_ie_len;
968 ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ies, ies_len,
970 ifmgd->auth_transaction = 2;
972 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
976 * The disassoc 'reason' argument can be either our own reason
977 * if self disconnected or a reason code from the AP.
979 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
980 bool deauth, bool self_disconnected,
983 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
984 struct ieee80211_local *local = sdata->local;
985 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
986 struct ieee80211_bss *bss;
987 struct sta_info *sta;
988 u32 changed = 0, config_changed = 0;
992 sta = sta_info_get(local, ifmgd->bssid);
999 ifmgd->direct_probe_tries = 0;
1000 ifmgd->auth_tries = 0;
1002 ifmgd->assoc_scan_tries = 0;
1003 ifmgd->assoc_tries = 0;
1005 netif_tx_stop_all_queues(sdata->dev);
1006 netif_carrier_off(sdata->dev);
1008 ieee80211_sta_tear_down_BA_sessions(sta);
1010 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
1011 conf->channel->center_freq,
1012 ifmgd->ssid, ifmgd->ssid_len);
1015 cfg80211_unhold_bss(&bss->cbss);
1016 ieee80211_rx_bss_put(local, bss);
1019 if (self_disconnected) {
1021 ieee80211_send_deauth_disassoc(sdata,
1022 IEEE80211_STYPE_DEAUTH, reason);
1024 ieee80211_send_deauth_disassoc(sdata,
1025 IEEE80211_STYPE_DISASSOC, reason);
1028 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
1029 changed |= ieee80211_reset_erp_info(sdata);
1031 ieee80211_led_assoc(local, 0);
1032 changed |= BSS_CHANGED_ASSOC;
1033 sdata->vif.bss_conf.assoc = false;
1035 ieee80211_sta_send_apinfo(sdata);
1037 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
1038 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1039 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1040 sdata->local->hw.conf.channel->center_freq,
1041 ifmgd->ssid, ifmgd->ssid_len);
1046 ieee80211_set_wmm_default(sdata);
1048 ieee80211_recalc_idle(local);
1050 /* channel(_type) changes are handled by ieee80211_hw_config */
1051 local->oper_channel_type = NL80211_CHAN_NO_HT;
1053 /* on the next assoc, re-program HT parameters */
1054 sdata->ht_opmode_valid = false;
1056 local->power_constr_level = 0;
1058 del_timer_sync(&local->dynamic_ps_timer);
1059 cancel_work_sync(&local->dynamic_ps_enable_work);
1061 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1062 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1063 config_changed |= IEEE80211_CONF_CHANGE_PS;
1066 ieee80211_hw_config(local, config_changed);
1067 ieee80211_bss_info_change_notify(sdata, changed);
1071 sta = sta_info_get(local, ifmgd->bssid);
1077 sta_info_unlink(&sta);
1081 sta_info_destroy(sta);
1084 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
1086 if (!sdata || !sdata->default_key ||
1087 sdata->default_key->conf.alg != ALG_WEP)
1092 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata)
1094 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1095 struct ieee80211_local *local = sdata->local;
1096 struct ieee80211_bss *bss;
1099 int privacy_invoked;
1101 if (!ifmgd || (ifmgd->flags & IEEE80211_STA_EXT_SME))
1104 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
1105 local->hw.conf.channel->center_freq,
1106 ifmgd->ssid, ifmgd->ssid_len);
1110 bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY);
1111 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
1112 privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED);
1114 ieee80211_rx_bss_put(local, bss);
1116 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
1122 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata)
1124 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1125 struct ieee80211_local *local = sdata->local;
1127 ifmgd->assoc_tries++;
1128 if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
1129 printk(KERN_DEBUG "%s: association with AP %pM"
1131 sdata->dev->name, ifmgd->bssid);
1132 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1133 ieee80211_recalc_idle(local);
1134 cfg80211_send_assoc_timeout(sdata->dev, ifmgd->bssid);
1135 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1136 sdata->local->hw.conf.channel->center_freq,
1137 ifmgd->ssid, ifmgd->ssid_len);
1139 * We might have a pending scan which had no chance to run yet
1140 * due to state == IEEE80211_STA_MLME_ASSOCIATE.
1141 * Hence, queue the STAs work again
1143 queue_work(local->hw.workqueue, &ifmgd->work);
1147 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1148 printk(KERN_DEBUG "%s: associate with AP %pM\n",
1149 sdata->dev->name, ifmgd->bssid);
1150 if (ieee80211_privacy_mismatch(sdata)) {
1151 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
1152 "mixed-cell disabled - abort association\n", sdata->dev->name);
1153 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1154 ieee80211_recalc_idle(local);
1158 ieee80211_send_assoc(sdata);
1160 mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1163 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1164 struct ieee80211_hdr *hdr)
1167 * We can postpone the mgd.timer whenever receiving unicast frames
1168 * from AP because we know that the connection is working both ways
1169 * at that time. But multicast frames (and hence also beacons) must
1170 * be ignored here, because we need to trigger the timer during
1171 * data idle periods for sending the periodical probe request to
1174 if (!is_multicast_ether_addr(hdr->addr1))
1175 mod_timer(&sdata->u.mgd.timer,
1176 jiffies + IEEE80211_MONITORING_INTERVAL);
1179 void ieee80211_beacon_loss_work(struct work_struct *work)
1181 struct ieee80211_sub_if_data *sdata =
1182 container_of(work, struct ieee80211_sub_if_data,
1183 u.mgd.beacon_loss_work);
1184 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1187 * The driver has already reported this event and we have
1188 * already sent a probe request. Maybe the AP died and the
1189 * driver keeps reporting until we disassociate... We have
1190 * to ignore that because otherwise we would continually
1191 * reset the timer and never check whether we received a
1194 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
1197 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1198 if (net_ratelimit()) {
1199 printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM "
1200 "- sending probe request\n", sdata->dev->name,
1201 sdata->u.mgd.bssid);
1205 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1206 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1207 ifmgd->ssid_len, NULL, 0);
1209 mod_timer(&ifmgd->timer, jiffies + IEEE80211_PROBE_WAIT);
1212 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1214 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1216 queue_work(sdata->local->hw.workqueue,
1217 &sdata->u.mgd.beacon_loss_work);
1219 EXPORT_SYMBOL(ieee80211_beacon_loss);
1221 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
1223 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1224 struct ieee80211_local *local = sdata->local;
1225 struct sta_info *sta;
1226 bool disassoc = false;
1228 /* TODO: start monitoring current AP signal quality and number of
1229 * missed beacons. Scan other channels every now and then and search
1230 * for better APs. */
1231 /* TODO: remove expired BSSes */
1233 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED;
1237 sta = sta_info_get(local, ifmgd->bssid);
1239 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
1240 sdata->dev->name, ifmgd->bssid);
1245 if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) &&
1246 time_after(jiffies, sta->last_rx + IEEE80211_PROBE_WAIT)) {
1247 printk(KERN_DEBUG "%s: no probe response from AP %pM "
1248 "- disassociating\n",
1249 sdata->dev->name, ifmgd->bssid);
1251 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1256 * Beacon filtering is only enabled with power save and then the
1257 * stack should not check for beacon loss.
1259 if (!((local->hw.flags & IEEE80211_HW_BEACON_FILTER) &&
1260 (local->hw.conf.flags & IEEE80211_CONF_PS)) &&
1262 ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) {
1263 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1264 if (net_ratelimit()) {
1265 printk(KERN_DEBUG "%s: beacon loss from AP %pM "
1266 "- sending probe request\n",
1267 sdata->dev->name, ifmgd->bssid);
1270 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1271 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1272 ifmgd->ssid_len, NULL, 0);
1277 if (time_after(jiffies, sta->last_rx + IEEE80211_PROBE_IDLE_TIME)) {
1278 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1279 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1280 ifmgd->ssid_len, NULL, 0);
1287 ieee80211_set_disassoc(sdata, true, true,
1288 WLAN_REASON_PREV_AUTH_NOT_VALID);
1290 mod_timer(&ifmgd->timer, jiffies +
1291 IEEE80211_MONITORING_INTERVAL);
1295 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata)
1297 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1299 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1300 ifmgd->flags |= IEEE80211_STA_AUTHENTICATED;
1301 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1302 /* Wait for SME to request association */
1303 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1304 ieee80211_recalc_idle(sdata->local);
1306 ieee80211_associate(sdata);
1310 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1311 struct ieee80211_mgmt *mgmt,
1315 struct ieee802_11_elems elems;
1317 pos = mgmt->u.auth.variable;
1318 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1319 if (!elems.challenge)
1321 ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg,
1322 elems.challenge - 2, elems.challenge_len + 2,
1323 sdata->u.mgd.bssid, 1);
1324 sdata->u.mgd.auth_transaction = 4;
1327 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1328 struct ieee80211_mgmt *mgmt,
1331 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1332 u16 auth_alg, auth_transaction, status_code;
1334 if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE)
1340 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1343 if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1346 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1347 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1348 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1350 if (auth_alg != ifmgd->auth_alg ||
1351 auth_transaction != ifmgd->auth_transaction)
1354 if (status_code != WLAN_STATUS_SUCCESS) {
1355 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1357 const int num_algs = ARRAY_SIZE(algs);
1359 algs[0] = algs[1] = algs[2] = 0xff;
1360 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1361 algs[0] = WLAN_AUTH_OPEN;
1362 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1363 algs[1] = WLAN_AUTH_SHARED_KEY;
1364 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1365 algs[2] = WLAN_AUTH_LEAP;
1366 if (ifmgd->auth_alg == WLAN_AUTH_OPEN)
1368 else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY)
1372 for (i = 0; i < num_algs; i++) {
1374 if (pos >= num_algs)
1376 if (algs[pos] == ifmgd->auth_alg ||
1379 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1380 !ieee80211_sta_wep_configured(sdata))
1382 ifmgd->auth_alg = algs[pos];
1389 switch (ifmgd->auth_alg) {
1390 case WLAN_AUTH_OPEN:
1391 case WLAN_AUTH_LEAP:
1393 ieee80211_auth_completed(sdata);
1394 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1396 case WLAN_AUTH_SHARED_KEY:
1397 if (ifmgd->auth_transaction == 4) {
1398 ieee80211_auth_completed(sdata);
1399 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1401 ieee80211_auth_challenge(sdata, mgmt, len);
1407 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1408 struct ieee80211_mgmt *mgmt,
1411 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1417 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1420 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1422 if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED)
1423 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1424 sdata->dev->name, reason_code);
1426 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1427 (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1428 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE ||
1429 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) {
1430 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1431 mod_timer(&ifmgd->timer, jiffies +
1432 IEEE80211_RETRY_AUTH_INTERVAL);
1435 ieee80211_set_disassoc(sdata, true, false, 0);
1436 ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED;
1437 cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, len);
1441 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1442 struct ieee80211_mgmt *mgmt,
1445 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1451 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1454 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1456 if (ifmgd->flags & IEEE80211_STA_ASSOCIATED)
1457 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1458 sdata->dev->name, reason_code);
1460 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1461 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1462 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1463 mod_timer(&ifmgd->timer, jiffies +
1464 IEEE80211_RETRY_AUTH_INTERVAL);
1467 ieee80211_set_disassoc(sdata, false, false, reason_code);
1468 cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, len);
1472 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1473 struct ieee80211_mgmt *mgmt,
1477 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1478 struct ieee80211_local *local = sdata->local;
1479 struct ieee80211_supported_band *sband;
1480 struct sta_info *sta;
1481 u32 rates, basic_rates;
1482 u16 capab_info, status_code, aid;
1483 struct ieee802_11_elems elems;
1484 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1488 bool have_higher_than_11mbit = false, newsta = false;
1489 u16 ap_ht_cap_flags;
1491 /* AssocResp and ReassocResp have identical structure, so process both
1492 * of them in this function. */
1494 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1500 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1503 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1504 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1505 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1507 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1508 "status=%d aid=%d)\n",
1509 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1510 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1512 pos = mgmt->u.assoc_resp.variable;
1513 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1515 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1516 elems.timeout_int && elems.timeout_int_len == 5 &&
1517 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1519 tu = get_unaligned_le32(elems.timeout_int + 1);
1520 ms = tu * 1024 / 1000;
1521 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1522 "comeback duration %u TU (%u ms)\n",
1523 sdata->dev->name, tu, ms);
1524 if (ms > IEEE80211_ASSOC_TIMEOUT)
1525 mod_timer(&ifmgd->timer,
1526 jiffies + msecs_to_jiffies(ms));
1530 if (status_code != WLAN_STATUS_SUCCESS) {
1531 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1532 sdata->dev->name, status_code);
1533 /* if this was a reassociation, ensure we try a "full"
1534 * association next time. This works around some broken APs
1535 * which do not correctly reject reassociation requests. */
1536 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1537 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1538 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1539 /* Wait for SME to decide what to do next */
1540 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1541 ieee80211_recalc_idle(local);
1546 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1547 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1548 "set\n", sdata->dev->name, aid);
1549 aid &= ~(BIT(15) | BIT(14));
1551 if (!elems.supp_rates) {
1552 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1557 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1559 ifmgd->ap_capab = capab_info;
1561 kfree(ifmgd->assocresp_ies);
1562 ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1563 ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL);
1564 if (ifmgd->assocresp_ies)
1565 memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len);
1569 /* Add STA entry for the AP */
1570 sta = sta_info_get(local, ifmgd->bssid);
1574 sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC);
1576 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1577 " the AP\n", sdata->dev->name);
1582 /* update new sta with its last rx activity */
1583 sta->last_rx = jiffies;
1587 * FIXME: Do we really need to update the sta_info's information here?
1588 * We already know about the AP (we found it in our list) so it
1589 * should already be filled with the right info, no?
1590 * As is stands, all this is racy because typically we assume
1591 * the information that is filled in here (except flags) doesn't
1592 * change while a STA structure is alive. As such, it should move
1593 * to between the sta_info_alloc() and sta_info_insert() above.
1596 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP);
1597 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1598 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1602 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1604 for (i = 0; i < elems.supp_rates_len; i++) {
1605 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1606 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1609 have_higher_than_11mbit = true;
1611 for (j = 0; j < sband->n_bitrates; j++) {
1612 if (sband->bitrates[j].bitrate == rate) {
1615 basic_rates |= BIT(j);
1621 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1622 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1623 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1626 have_higher_than_11mbit = true;
1628 for (j = 0; j < sband->n_bitrates; j++) {
1629 if (sband->bitrates[j].bitrate == rate) {
1632 basic_rates |= BIT(j);
1638 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1639 sdata->vif.bss_conf.basic_rates = basic_rates;
1641 /* cf. IEEE 802.11 9.2.12 */
1642 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1643 have_higher_than_11mbit)
1644 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1646 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1648 /* If TKIP/WEP is used, no need to parse AP's HT capabilities */
1649 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1650 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1651 elems.ht_cap_elem, &sta->sta.ht_cap);
1653 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1655 rate_control_rate_init(sta);
1657 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1658 set_sta_flags(sta, WLAN_STA_MFP);
1660 if (elems.wmm_param)
1661 set_sta_flags(sta, WLAN_STA_WME);
1664 int err = sta_info_insert(sta);
1666 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1667 " the AP (error %d)\n", sdata->dev->name, err);
1675 if (elems.wmm_param)
1676 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1677 elems.wmm_param_len);
1679 ieee80211_set_wmm_default(sdata);
1681 if (elems.ht_info_elem && elems.wmm_param &&
1682 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1683 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1684 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1687 /* set AID and assoc capability,
1688 * ieee80211_set_associated() will tell the driver */
1689 bss_conf->aid = aid;
1690 bss_conf->assoc_capability = capab_info;
1691 ieee80211_set_associated(sdata, changed);
1694 * initialise the time of last beacon to be the association time,
1695 * otherwise beacon loss check will trigger immediately
1697 ifmgd->last_beacon = jiffies;
1699 ieee80211_associated(sdata);
1700 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1704 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1705 struct ieee80211_mgmt *mgmt,
1707 struct ieee80211_rx_status *rx_status,
1708 struct ieee802_11_elems *elems,
1711 struct ieee80211_local *local = sdata->local;
1713 struct ieee80211_bss *bss;
1714 struct ieee80211_channel *channel;
1716 if (elems->ds_params && elems->ds_params_len == 1)
1717 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1719 freq = rx_status->freq;
1721 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1723 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1726 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1731 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1732 (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) {
1733 struct ieee80211_channel_sw_ie *sw_elem =
1734 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1735 ieee80211_process_chanswitch(sdata, sw_elem, bss);
1738 ieee80211_rx_bss_put(local, bss);
1742 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1743 struct ieee80211_mgmt *mgmt,
1745 struct ieee80211_rx_status *rx_status)
1747 struct ieee80211_if_managed *ifmgd;
1749 struct ieee802_11_elems elems;
1751 ifmgd = &sdata->u.mgd;
1753 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1754 return; /* ignore ProbeResp to foreign address */
1756 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1760 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1763 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1765 /* direct probe may be part of the association flow */
1766 if (ifmgd->state == IEEE80211_STA_MLME_DIRECT_PROBE) {
1767 printk(KERN_DEBUG "%s direct probe responded\n",
1769 ieee80211_authenticate(sdata);
1772 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
1773 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1777 * This is the canonical list of information elements we care about,
1778 * the filter code also gives us all changes to the Microsoft OUI
1779 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1781 * We implement beacon filtering in software since that means we can
1782 * avoid processing the frame here and in cfg80211, and userspace
1783 * will not be able to tell whether the hardware supports it or not.
1785 * XXX: This list needs to be dynamic -- userspace needs to be able to
1786 * add items it requires. It also needs to be able to tell us to
1787 * look out for other vendor IEs.
1789 static const u64 care_about_ies =
1790 (1ULL << WLAN_EID_COUNTRY) |
1791 (1ULL << WLAN_EID_ERP_INFO) |
1792 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1793 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1794 (1ULL << WLAN_EID_HT_CAPABILITY) |
1795 (1ULL << WLAN_EID_HT_INFORMATION);
1797 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1798 struct ieee80211_mgmt *mgmt,
1800 struct ieee80211_rx_status *rx_status)
1802 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1804 struct ieee802_11_elems elems;
1805 struct ieee80211_local *local = sdata->local;
1807 bool erp_valid, directed_tim = false;
1811 /* Process beacon from the current BSS */
1812 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1816 if (rx_status->freq != local->hw.conf.channel->center_freq)
1819 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) ||
1820 memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1823 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1824 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1825 len - baselen, &elems,
1826 care_about_ies, ncrc);
1828 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1829 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1832 ncrc = crc32_be(ncrc, (void *)&directed_tim, sizeof(directed_tim));
1834 if (ncrc == ifmgd->beacon_crc)
1836 ifmgd->beacon_crc = ncrc;
1838 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
1840 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1841 elems.wmm_param_len);
1843 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1845 if (local->hw.conf.dynamic_ps_timeout > 0) {
1846 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1847 ieee80211_hw_config(local,
1848 IEEE80211_CONF_CHANGE_PS);
1849 ieee80211_send_nullfunc(local, sdata, 0);
1851 local->pspolling = true;
1854 * Here is assumed that the driver will be
1855 * able to send ps-poll frame and receive a
1856 * response even though power save mode is
1857 * enabled, but some drivers might require
1858 * to disable power save here. This needs
1859 * to be investigated.
1861 ieee80211_send_pspoll(local, sdata);
1866 if (elems.erp_info && elems.erp_info_len >= 1) {
1868 erp_value = elems.erp_info[0];
1872 changed |= ieee80211_handle_bss_capability(sdata,
1873 le16_to_cpu(mgmt->u.beacon.capab_info),
1874 erp_valid, erp_value);
1877 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1878 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) {
1879 struct sta_info *sta;
1880 struct ieee80211_supported_band *sband;
1881 u16 ap_ht_cap_flags;
1885 sta = sta_info_get(local, ifmgd->bssid);
1891 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1893 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1894 elems.ht_cap_elem, &sta->sta.ht_cap);
1896 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1900 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1904 if (elems.country_elem) {
1905 /* Note we are only reviewing this on beacons
1906 * for the BSSID we are associated to */
1907 regulatory_hint_11d(local->hw.wiphy,
1908 elems.country_elem, elems.country_elem_len);
1910 /* TODO: IBSS also needs this */
1911 if (elems.pwr_constr_elem)
1912 ieee80211_handle_pwr_constr(sdata,
1913 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1914 elems.pwr_constr_elem,
1915 elems.pwr_constr_elem_len);
1918 ieee80211_bss_info_change_notify(sdata, changed);
1921 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1922 struct sk_buff *skb,
1923 struct ieee80211_rx_status *rx_status)
1925 struct ieee80211_local *local = sdata->local;
1926 struct ieee80211_mgmt *mgmt;
1930 return RX_DROP_MONITOR;
1932 mgmt = (struct ieee80211_mgmt *) skb->data;
1933 fc = le16_to_cpu(mgmt->frame_control);
1935 switch (fc & IEEE80211_FCTL_STYPE) {
1936 case IEEE80211_STYPE_PROBE_REQ:
1937 case IEEE80211_STYPE_PROBE_RESP:
1938 case IEEE80211_STYPE_BEACON:
1939 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1940 case IEEE80211_STYPE_AUTH:
1941 case IEEE80211_STYPE_ASSOC_RESP:
1942 case IEEE80211_STYPE_REASSOC_RESP:
1943 case IEEE80211_STYPE_DEAUTH:
1944 case IEEE80211_STYPE_DISASSOC:
1945 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1946 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
1950 return RX_DROP_MONITOR;
1953 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1954 struct sk_buff *skb)
1956 struct ieee80211_rx_status *rx_status;
1957 struct ieee80211_mgmt *mgmt;
1960 rx_status = (struct ieee80211_rx_status *) skb->cb;
1961 mgmt = (struct ieee80211_mgmt *) skb->data;
1962 fc = le16_to_cpu(mgmt->frame_control);
1964 switch (fc & IEEE80211_FCTL_STYPE) {
1965 case IEEE80211_STYPE_PROBE_RESP:
1966 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
1969 case IEEE80211_STYPE_BEACON:
1970 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1973 case IEEE80211_STYPE_AUTH:
1974 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
1976 case IEEE80211_STYPE_ASSOC_RESP:
1977 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0);
1979 case IEEE80211_STYPE_REASSOC_RESP:
1980 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1);
1982 case IEEE80211_STYPE_DEAUTH:
1983 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1985 case IEEE80211_STYPE_DISASSOC:
1986 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1993 static void ieee80211_sta_timer(unsigned long data)
1995 struct ieee80211_sub_if_data *sdata =
1996 (struct ieee80211_sub_if_data *) data;
1997 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1998 struct ieee80211_local *local = sdata->local;
2000 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2001 queue_work(local->hw.workqueue, &ifmgd->work);
2004 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata)
2006 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2007 struct ieee80211_local *local = sdata->local;
2009 /* Reset own TSF to allow time synchronization work. */
2010 drv_reset_tsf(local);
2012 ifmgd->wmm_last_param_set = -1; /* allow any WMM update */
2015 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2016 ifmgd->auth_alg = WLAN_AUTH_OPEN;
2017 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2018 ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY;
2019 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2020 ifmgd->auth_alg = WLAN_AUTH_LEAP;
2021 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_FT)
2022 ifmgd->auth_alg = WLAN_AUTH_FT;
2024 ifmgd->auth_alg = WLAN_AUTH_OPEN;
2025 ifmgd->auth_transaction = -1;
2026 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
2027 ifmgd->assoc_scan_tries = 0;
2028 ifmgd->direct_probe_tries = 0;
2029 ifmgd->auth_tries = 0;
2030 ifmgd->assoc_tries = 0;
2031 netif_tx_stop_all_queues(sdata->dev);
2032 netif_carrier_off(sdata->dev);
2035 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata)
2037 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2038 struct ieee80211_local *local = sdata->local;
2039 struct ieee80211_bss *bss;
2040 u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid;
2041 u8 ssid_len = ifmgd->ssid_len;
2042 u16 capa_mask = WLAN_CAPABILITY_ESS;
2043 u16 capa_val = WLAN_CAPABILITY_ESS;
2044 struct ieee80211_channel *chan = local->oper_channel;
2046 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
2047 ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2048 IEEE80211_STA_AUTO_BSSID_SEL |
2049 IEEE80211_STA_AUTO_CHANNEL_SEL)) {
2050 capa_mask |= WLAN_CAPABILITY_PRIVACY;
2051 if (sdata->default_key)
2052 capa_val |= WLAN_CAPABILITY_PRIVACY;
2055 if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2058 if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2061 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) {
2066 bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
2067 bssid, ssid, ssid_len,
2068 capa_mask, capa_val);
2071 ieee80211_set_freq(sdata, bss->cbss.channel->center_freq);
2072 if (!(ifmgd->flags & IEEE80211_STA_SSID_SET))
2073 ieee80211_sta_set_ssid(sdata, bss->ssid,
2075 ieee80211_sta_set_bssid(sdata, bss->cbss.bssid);
2076 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
2078 if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED)
2079 sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED;
2081 sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED;
2083 /* Send out direct probe if no probe resp was received or
2084 * the one we have is outdated
2086 if (!bss->last_probe_resp ||
2087 time_after(jiffies, bss->last_probe_resp
2088 + IEEE80211_SCAN_RESULT_EXPIRE))
2089 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2091 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2093 ieee80211_rx_bss_put(local, bss);
2094 ieee80211_sta_reset_auth(sdata);
2097 if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2099 ifmgd->assoc_scan_tries++;
2101 ieee80211_request_internal_scan(sdata, ifmgd->ssid,
2104 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2105 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
2107 ifmgd->assoc_scan_tries = 0;
2108 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
2109 ieee80211_recalc_idle(local);
2116 static void ieee80211_sta_work(struct work_struct *work)
2118 struct ieee80211_sub_if_data *sdata =
2119 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
2120 struct ieee80211_local *local = sdata->local;
2121 struct ieee80211_if_managed *ifmgd;
2122 struct sk_buff *skb;
2124 if (!netif_running(sdata->dev))
2127 if (local->sw_scanning || local->hw_scanning)
2130 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2132 ifmgd = &sdata->u.mgd;
2134 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
2135 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2137 if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2138 ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2139 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE &&
2140 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) {
2141 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2142 round_jiffies_relative(0));
2146 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) {
2147 if (ieee80211_sta_config_auth(sdata))
2149 clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2150 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request))
2153 ieee80211_recalc_idle(local);
2155 switch (ifmgd->state) {
2156 case IEEE80211_STA_MLME_DISABLED:
2158 case IEEE80211_STA_MLME_DIRECT_PROBE:
2159 ieee80211_direct_probe(sdata);
2161 case IEEE80211_STA_MLME_AUTHENTICATE:
2162 ieee80211_authenticate(sdata);
2164 case IEEE80211_STA_MLME_ASSOCIATE:
2165 ieee80211_associate(sdata);
2167 case IEEE80211_STA_MLME_ASSOCIATED:
2168 ieee80211_associated(sdata);
2175 if (ieee80211_privacy_mismatch(sdata)) {
2176 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2177 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2179 ieee80211_set_disassoc(sdata, false, true,
2180 WLAN_REASON_UNSPECIFIED);
2184 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2186 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2188 * Need to update last_beacon to avoid beacon loss
2191 sdata->u.mgd.last_beacon = jiffies;
2194 queue_work(sdata->local->hw.workqueue,
2195 &sdata->u.mgd.work);
2199 /* interface setup */
2200 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2202 struct ieee80211_if_managed *ifmgd;
2205 ifmgd = &sdata->u.mgd;
2206 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
2207 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
2208 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
2209 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
2210 (unsigned long) sdata);
2211 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
2212 (unsigned long) sdata);
2213 skb_queue_head_init(&ifmgd->skb_queue);
2215 ifmgd->capab = WLAN_CAPABILITY_ESS;
2216 ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2217 IEEE80211_AUTH_ALG_SHARED_KEY;
2218 ifmgd->flags |= IEEE80211_STA_CREATE_IBSS |
2219 IEEE80211_STA_AUTO_BSSID_SEL |
2220 IEEE80211_STA_AUTO_CHANNEL_SEL;
2221 if (sdata->local->hw.queues >= 4)
2222 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
2224 hw_flags = sdata->local->hw.flags;
2226 if (hw_flags & IEEE80211_HW_SUPPORTS_PS) {
2227 ifmgd->powersave = CONFIG_MAC80211_DEFAULT_PS_VALUE;
2228 sdata->local->hw.conf.dynamic_ps_timeout = 500;
2232 /* configuration hooks */
2233 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata)
2235 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2236 struct ieee80211_local *local = sdata->local;
2238 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2241 if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET |
2242 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2243 (ifmgd->flags & (IEEE80211_STA_SSID_SET |
2244 IEEE80211_STA_AUTO_SSID_SEL))) {
2246 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)
2247 ieee80211_set_disassoc(sdata, true, true,
2248 WLAN_REASON_DEAUTH_LEAVING);
2250 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) ||
2251 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
2252 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
2253 else if (ifmgd->flags & IEEE80211_STA_EXT_SME)
2254 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2255 queue_work(local->hw.workqueue, &ifmgd->work);
2259 int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata)
2261 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2263 if (ifmgd->ssid_len)
2264 ifmgd->flags |= IEEE80211_STA_SSID_SET;
2266 ifmgd->flags &= ~IEEE80211_STA_SSID_SET;
2271 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2273 struct ieee80211_if_managed *ifmgd;
2275 if (len > IEEE80211_MAX_SSID_LEN)
2278 ifmgd = &sdata->u.mgd;
2280 if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) {
2282 * Do not use reassociation if SSID is changed (different ESS).
2284 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2285 memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid));
2286 memcpy(ifmgd->ssid, ssid, len);
2287 ifmgd->ssid_len = len;
2290 return ieee80211_sta_commit(sdata);
2293 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2295 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2296 memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len);
2297 *len = ifmgd->ssid_len;
2301 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2303 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2305 if (is_valid_ether_addr(bssid)) {
2306 memcpy(ifmgd->bssid, bssid, ETH_ALEN);
2307 ifmgd->flags |= IEEE80211_STA_BSSID_SET;
2309 memset(ifmgd->bssid, 0, ETH_ALEN);
2310 ifmgd->flags &= ~IEEE80211_STA_BSSID_SET;
2313 if (netif_running(sdata->dev))
2314 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2316 return ieee80211_sta_commit(sdata);
2319 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
2320 const char *ie, size_t len)
2322 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2324 kfree(ifmgd->extra_ie);
2326 ifmgd->extra_ie = NULL;
2327 ifmgd->extra_ie_len = 0;
2330 ifmgd->extra_ie = kmalloc(len, GFP_KERNEL);
2331 if (!ifmgd->extra_ie) {
2332 ifmgd->extra_ie_len = 0;
2335 memcpy(ifmgd->extra_ie, ie, len);
2336 ifmgd->extra_ie_len = len;
2340 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2342 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2343 sdata->dev->name, reason);
2345 ieee80211_set_disassoc(sdata, true, true, reason);
2349 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2351 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2353 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2354 sdata->dev->name, reason);
2356 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED))
2359 ieee80211_set_disassoc(sdata, false, true, reason);
2363 /* scan finished notification */
2364 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2366 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2368 /* Restart STA timers */
2370 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2371 ieee80211_restart_sta_timer(sdata);
2375 int ieee80211_max_network_latency(struct notifier_block *nb,
2376 unsigned long data, void *dummy)
2378 s32 latency_usec = (s32) data;
2379 struct ieee80211_local *local =
2380 container_of(nb, struct ieee80211_local,
2381 network_latency_notifier);
2383 mutex_lock(&local->iflist_mtx);
2384 ieee80211_recalc_ps(local, latency_usec);
2385 mutex_unlock(&local->iflist_mtx);