2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/rtnetlink.h>
20 #include <net/mac80211.h>
21 #include <asm/unaligned.h>
23 #include "ieee80211_i.h"
27 #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
28 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
29 #define IEEE80211_AUTH_MAX_TRIES 3
30 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
31 #define IEEE80211_ASSOC_MAX_TRIES 3
32 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
33 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
34 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
37 static int ecw2cw(int ecw)
39 return (1 << ecw) - 1;
42 static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
46 pos = bss->cbss.information_elements;
49 end = pos + bss->cbss.len_information_elements;
51 while (pos + 1 < end) {
52 if (pos + 2 + pos[1] > end)
62 static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
63 struct ieee80211_supported_band *sband,
69 for (i = 0; i < bss->supp_rates_len; i++) {
70 int rate = (bss->supp_rates[i] & 0x7F) * 5;
72 for (j = 0; j < sband->n_bitrates; j++)
73 if (sband->bitrates[j].bitrate == rate) {
83 /* frame sending functions */
85 static void add_extra_ies(struct sk_buff *skb, u8 *ies, size_t ies_len)
88 memcpy(skb_put(skb, ies_len), ies, ies_len);
91 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
93 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
94 struct ieee80211_local *local = sdata->local;
96 struct ieee80211_mgmt *mgmt;
97 u8 *pos, *ies, *ht_ie, *e_ies;
98 int i, len, count, rates_len, supp_rates_len;
100 struct ieee80211_bss *bss;
102 struct ieee80211_supported_band *sband;
106 if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) {
107 e_ies = sdata->u.mgd.ie_reassocreq;
108 e_ies_len = sdata->u.mgd.ie_reassocreq_len;
110 e_ies = sdata->u.mgd.ie_assocreq;
111 e_ies_len = sdata->u.mgd.ie_assocreq_len;
114 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
115 sizeof(*mgmt) + 200 + ifmgd->extra_ie_len +
116 ifmgd->ssid_len + e_ies_len);
118 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
119 "frame\n", sdata->dev->name);
122 skb_reserve(skb, local->hw.extra_tx_headroom);
124 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
126 capab = ifmgd->capab;
128 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
129 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
130 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
131 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
132 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
135 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
136 local->hw.conf.channel->center_freq,
137 ifmgd->ssid, ifmgd->ssid_len);
139 if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
140 capab |= WLAN_CAPABILITY_PRIVACY;
144 /* get all rates supported by the device and the AP as
145 * some APs don't like getting a superset of their rates
146 * in the association request (e.g. D-Link DAP 1353 in
148 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
150 if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
151 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
152 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
154 ieee80211_rx_bss_put(local, bss);
157 rates_len = sband->n_bitrates;
160 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
162 memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
163 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
164 memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
166 if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) {
168 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
169 IEEE80211_STYPE_REASSOC_REQ);
170 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
171 mgmt->u.reassoc_req.listen_interval =
172 cpu_to_le16(local->hw.conf.listen_interval);
173 memcpy(mgmt->u.reassoc_req.current_ap, ifmgd->prev_bssid,
177 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
178 IEEE80211_STYPE_ASSOC_REQ);
179 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
180 mgmt->u.assoc_req.listen_interval =
181 cpu_to_le16(local->hw.conf.listen_interval);
185 ies = pos = skb_put(skb, 2 + ifmgd->ssid_len);
186 *pos++ = WLAN_EID_SSID;
187 *pos++ = ifmgd->ssid_len;
188 memcpy(pos, ifmgd->ssid, ifmgd->ssid_len);
190 /* add all rates which were marked to be used above */
191 supp_rates_len = rates_len;
192 if (supp_rates_len > 8)
195 len = sband->n_bitrates;
196 pos = skb_put(skb, supp_rates_len + 2);
197 *pos++ = WLAN_EID_SUPP_RATES;
198 *pos++ = supp_rates_len;
201 for (i = 0; i < sband->n_bitrates; i++) {
202 if (BIT(i) & rates) {
203 int rate = sband->bitrates[i].bitrate;
204 *pos++ = (u8) (rate / 5);
210 if (rates_len > count) {
211 pos = skb_put(skb, rates_len - count + 2);
212 *pos++ = WLAN_EID_EXT_SUPP_RATES;
213 *pos++ = rates_len - count;
215 for (i++; i < sband->n_bitrates; i++) {
216 if (BIT(i) & rates) {
217 int rate = sband->bitrates[i].bitrate;
218 *pos++ = (u8) (rate / 5);
223 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
224 /* 1. power capabilities */
225 pos = skb_put(skb, 4);
226 *pos++ = WLAN_EID_PWR_CAPABILITY;
228 *pos++ = 0; /* min tx power */
229 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
231 /* 2. supported channels */
232 /* TODO: get this in reg domain format */
233 pos = skb_put(skb, 2 * sband->n_channels + 2);
234 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
235 *pos++ = 2 * sband->n_channels;
236 for (i = 0; i < sband->n_channels; i++) {
237 *pos++ = ieee80211_frequency_to_channel(
238 sband->channels[i].center_freq);
239 *pos++ = 1; /* one channel in the subband*/
243 if (ifmgd->extra_ie) {
244 pos = skb_put(skb, ifmgd->extra_ie_len);
245 memcpy(pos, ifmgd->extra_ie, ifmgd->extra_ie_len);
248 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
249 pos = skb_put(skb, 9);
250 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
251 *pos++ = 7; /* len */
252 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
255 *pos++ = 2; /* WME */
256 *pos++ = 0; /* WME info */
257 *pos++ = 1; /* WME ver */
261 /* wmm support is a must to HT */
263 * IEEE802.11n does not allow TKIP/WEP as pairwise
264 * ciphers in HT mode. We still associate in non-ht
265 * mode (11a/b/g) if any one of these ciphers is
266 * configured as pairwise.
268 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
269 sband->ht_cap.ht_supported &&
270 (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) &&
271 ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
272 (!(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))) {
273 struct ieee80211_ht_info *ht_info =
274 (struct ieee80211_ht_info *)(ht_ie + 2);
275 u16 cap = sband->ht_cap.cap;
277 u32 flags = local->hw.conf.channel->flags;
279 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
280 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
281 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
282 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
283 cap &= ~IEEE80211_HT_CAP_SGI_40;
286 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
287 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
288 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
289 cap &= ~IEEE80211_HT_CAP_SGI_40;
294 tmp = cpu_to_le16(cap);
295 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
296 *pos++ = WLAN_EID_HT_CAPABILITY;
297 *pos++ = sizeof(struct ieee80211_ht_cap);
298 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
299 memcpy(pos, &tmp, sizeof(u16));
301 /* TODO: needs a define here for << 2 */
302 *pos++ = sband->ht_cap.ampdu_factor |
303 (sband->ht_cap.ampdu_density << 2);
304 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
307 add_extra_ies(skb, e_ies, e_ies_len);
309 kfree(ifmgd->assocreq_ies);
310 ifmgd->assocreq_ies_len = (skb->data + skb->len) - ies;
311 ifmgd->assocreq_ies = kmalloc(ifmgd->assocreq_ies_len, GFP_KERNEL);
312 if (ifmgd->assocreq_ies)
313 memcpy(ifmgd->assocreq_ies, ies, ifmgd->assocreq_ies_len);
315 ieee80211_tx_skb(sdata, skb, 0);
319 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
320 u16 stype, u16 reason)
322 struct ieee80211_local *local = sdata->local;
323 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
325 struct ieee80211_mgmt *mgmt;
329 if (stype == IEEE80211_STYPE_DEAUTH) {
330 ies = sdata->u.mgd.ie_deauth;
331 ies_len = sdata->u.mgd.ie_deauth_len;
333 ies = sdata->u.mgd.ie_disassoc;
334 ies_len = sdata->u.mgd.ie_disassoc_len;
337 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) +
340 printk(KERN_DEBUG "%s: failed to allocate buffer for "
341 "deauth/disassoc frame\n", sdata->dev->name);
344 skb_reserve(skb, local->hw.extra_tx_headroom);
346 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
348 memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
349 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
350 memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
351 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
353 /* u.deauth.reason_code == u.disassoc.reason_code */
354 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
356 add_extra_ies(skb, ies, ies_len);
358 ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
361 void ieee80211_send_pspoll(struct ieee80211_local *local,
362 struct ieee80211_sub_if_data *sdata)
364 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
365 struct ieee80211_pspoll *pspoll;
369 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
371 printk(KERN_DEBUG "%s: failed to allocate buffer for "
372 "pspoll frame\n", sdata->dev->name);
375 skb_reserve(skb, local->hw.extra_tx_headroom);
377 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
378 memset(pspoll, 0, sizeof(*pspoll));
379 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
380 pspoll->frame_control = cpu_to_le16(fc);
381 pspoll->aid = cpu_to_le16(ifmgd->aid);
383 /* aid in PS-Poll has its two MSBs each set to 1 */
384 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
386 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
387 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
389 ieee80211_tx_skb(sdata, skb, 0);
393 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
394 struct ieee80211_if_managed *ifmgd,
395 u8 *wmm_param, size_t wmm_param_len)
397 struct ieee80211_tx_queue_params params;
402 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
408 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
410 count = wmm_param[6] & 0x0f;
411 if (count == ifmgd->wmm_last_param_set)
413 ifmgd->wmm_last_param_set = count;
416 left = wmm_param_len - 8;
418 memset(¶ms, 0, sizeof(params));
421 for (; left >= 4; left -= 4, pos += 4) {
422 int aci = (pos[0] >> 5) & 0x03;
423 int acm = (pos[0] >> 4) & 0x01;
430 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
435 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
440 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
446 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
450 params.aifs = pos[0] & 0x0f;
451 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
452 params.cw_min = ecw2cw(pos[1] & 0x0f);
453 params.txop = get_unaligned_le16(pos + 2);
454 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
455 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
456 "cWmin=%d cWmax=%d txop=%d\n",
457 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
458 params.cw_max, params.txop);
460 if (local->ops->conf_tx &&
461 local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) {
462 printk(KERN_DEBUG "%s: failed to set TX queue "
463 "parameters for queue %d\n", local->mdev->name, queue);
468 static bool ieee80211_check_tim(struct ieee802_11_elems *elems, u16 aid)
471 u8 index, indexn1, indexn2;
472 struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *) elems->tim;
476 mask = 1 << (aid & 7);
478 indexn1 = tim->bitmap_ctrl & 0xfe;
479 indexn2 = elems->tim_len + indexn1 - 4;
481 if (index < indexn1 || index > indexn2)
486 return !!(tim->virtual_map[index] & mask);
489 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
490 u16 capab, bool erp_valid, u8 erp)
492 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
493 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
494 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
498 bool use_short_preamble;
502 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
503 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
505 use_protection = false;
506 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
509 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
511 if (use_protection != bss_conf->use_cts_prot) {
512 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
513 if (net_ratelimit()) {
514 printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
516 use_protection ? "enabled" : "disabled",
520 bss_conf->use_cts_prot = use_protection;
521 changed |= BSS_CHANGED_ERP_CTS_PROT;
524 if (use_short_preamble != bss_conf->use_short_preamble) {
525 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
526 if (net_ratelimit()) {
527 printk(KERN_DEBUG "%s: switched to %s barker preamble"
530 use_short_preamble ? "short" : "long",
534 bss_conf->use_short_preamble = use_short_preamble;
535 changed |= BSS_CHANGED_ERP_PREAMBLE;
538 if (use_short_slot != bss_conf->use_short_slot) {
539 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
540 if (net_ratelimit()) {
541 printk(KERN_DEBUG "%s: switched to %s slot time"
544 use_short_slot ? "short" : "long",
548 bss_conf->use_short_slot = use_short_slot;
549 changed |= BSS_CHANGED_ERP_SLOT;
555 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata)
557 union iwreq_data wrqu;
559 memset(&wrqu, 0, sizeof(wrqu));
560 if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED)
561 memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN);
562 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
563 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
566 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata)
568 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
572 union iwreq_data wrqu;
574 if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies)
577 buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len +
578 ifmgd->assocresp_ies_len), GFP_KERNEL);
582 len = sprintf(buf, "ASSOCINFO(");
583 if (ifmgd->assocreq_ies) {
584 len += sprintf(buf + len, "ReqIEs=");
585 for (i = 0; i < ifmgd->assocreq_ies_len; i++) {
586 len += sprintf(buf + len, "%02x",
587 ifmgd->assocreq_ies[i]);
590 if (ifmgd->assocresp_ies) {
591 if (ifmgd->assocreq_ies)
592 len += sprintf(buf + len, " ");
593 len += sprintf(buf + len, "RespIEs=");
594 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
595 len += sprintf(buf + len, "%02x",
596 ifmgd->assocresp_ies[i]);
599 len += sprintf(buf + len, ")");
601 if (len > IW_CUSTOM_MAX) {
602 len = sprintf(buf, "ASSOCRESPIE=");
603 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
604 len += sprintf(buf + len, "%02x",
605 ifmgd->assocresp_ies[i]);
609 if (len <= IW_CUSTOM_MAX) {
610 memset(&wrqu, 0, sizeof(wrqu));
611 wrqu.data.length = len;
612 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
619 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
620 u32 bss_info_changed)
622 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
623 struct ieee80211_local *local = sdata->local;
624 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
626 struct ieee80211_bss *bss;
628 bss_info_changed |= BSS_CHANGED_ASSOC;
629 ifmgd->flags |= IEEE80211_STA_ASSOCIATED;
631 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
632 conf->channel->center_freq,
633 ifmgd->ssid, ifmgd->ssid_len);
635 /* set timing information */
636 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
637 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
638 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
640 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
641 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
643 ieee80211_rx_bss_put(local, bss);
646 ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET;
647 memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN);
648 ieee80211_sta_send_associnfo(sdata);
650 ifmgd->last_probe = jiffies;
651 ieee80211_led_assoc(local, 1);
653 sdata->vif.bss_conf.assoc = 1;
655 * For now just always ask the driver to update the basic rateset
656 * when we have associated, we aren't checking whether it actually
659 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
660 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
662 if (local->powersave) {
663 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) &&
664 local->hw.conf.dynamic_ps_timeout > 0) {
665 mod_timer(&local->dynamic_ps_timer, jiffies +
667 local->hw.conf.dynamic_ps_timeout));
669 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
670 ieee80211_send_nullfunc(local, sdata, 1);
671 conf->flags |= IEEE80211_CONF_PS;
672 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
676 netif_tx_start_all_queues(sdata->dev);
677 netif_carrier_on(sdata->dev);
679 ieee80211_sta_send_apinfo(sdata);
682 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata)
684 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
685 struct ieee80211_local *local = sdata->local;
687 ifmgd->direct_probe_tries++;
688 if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
689 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
690 sdata->dev->name, ifmgd->bssid);
691 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
692 ieee80211_sta_send_apinfo(sdata);
695 * Most likely AP is not in the range so remove the
696 * bss information associated to the AP
698 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
699 sdata->local->hw.conf.channel->center_freq,
700 ifmgd->ssid, ifmgd->ssid_len);
703 * We might have a pending scan which had no chance to run yet
704 * due to state == IEEE80211_STA_MLME_DIRECT_PROBE.
705 * Hence, queue the STAs work again
707 queue_work(local->hw.workqueue, &ifmgd->work);
711 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
712 sdata->dev->name, ifmgd->bssid,
713 ifmgd->direct_probe_tries);
715 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
717 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifmgd->request);
719 /* Direct probe is sent to broadcast address as some APs
720 * will not answer to direct packet in unassociated state.
722 ieee80211_send_probe_req(sdata, NULL,
723 ifmgd->ssid, ifmgd->ssid_len, NULL, 0);
725 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
729 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata)
731 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
732 struct ieee80211_local *local = sdata->local;
735 if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
736 printk(KERN_DEBUG "%s: authentication with AP %pM"
738 sdata->dev->name, ifmgd->bssid);
739 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
740 ieee80211_sta_send_apinfo(sdata);
741 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
742 sdata->local->hw.conf.channel->center_freq,
743 ifmgd->ssid, ifmgd->ssid_len);
746 * We might have a pending scan which had no chance to run yet
747 * due to state == IEEE80211_STA_MLME_AUTHENTICATE.
748 * Hence, queue the STAs work again
750 queue_work(local->hw.workqueue, &ifmgd->work);
754 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
755 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
756 sdata->dev->name, ifmgd->bssid);
758 ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, NULL, 0,
760 ifmgd->auth_transaction = 2;
762 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
766 * The disassoc 'reason' argument can be either our own reason
767 * if self disconnected or a reason code from the AP.
769 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
770 bool deauth, bool self_disconnected,
773 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
774 struct ieee80211_local *local = sdata->local;
775 struct sta_info *sta;
776 u32 changed = 0, config_changed = 0;
780 sta = sta_info_get(local, ifmgd->bssid);
787 ifmgd->direct_probe_tries = 0;
788 ifmgd->auth_tries = 0;
790 ifmgd->assoc_scan_tries = 0;
791 ifmgd->assoc_tries = 0;
793 netif_tx_stop_all_queues(sdata->dev);
794 netif_carrier_off(sdata->dev);
796 ieee80211_sta_tear_down_BA_sessions(sta);
798 if (self_disconnected) {
800 ieee80211_send_deauth_disassoc(sdata,
801 IEEE80211_STYPE_DEAUTH, reason);
803 ieee80211_send_deauth_disassoc(sdata,
804 IEEE80211_STYPE_DISASSOC, reason);
807 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
808 changed |= ieee80211_reset_erp_info(sdata);
810 ieee80211_led_assoc(local, 0);
811 changed |= BSS_CHANGED_ASSOC;
812 sdata->vif.bss_conf.assoc = false;
814 ieee80211_sta_send_apinfo(sdata);
816 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
817 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
818 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
819 sdata->local->hw.conf.channel->center_freq,
820 ifmgd->ssid, ifmgd->ssid_len);
825 /* channel(_type) changes are handled by ieee80211_hw_config */
826 local->oper_channel_type = NL80211_CHAN_NO_HT;
828 local->power_constr_level = 0;
830 del_timer_sync(&local->dynamic_ps_timer);
831 cancel_work_sync(&local->dynamic_ps_enable_work);
833 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
834 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
835 config_changed |= IEEE80211_CONF_CHANGE_PS;
838 ieee80211_hw_config(local, config_changed);
839 ieee80211_bss_info_change_notify(sdata, changed);
843 sta = sta_info_get(local, ifmgd->bssid);
849 sta_info_unlink(&sta);
853 sta_info_destroy(sta);
856 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
858 if (!sdata || !sdata->default_key ||
859 sdata->default_key->conf.alg != ALG_WEP)
864 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata)
866 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
867 struct ieee80211_local *local = sdata->local;
868 struct ieee80211_bss *bss;
873 if (!ifmgd || (ifmgd->flags & IEEE80211_STA_MIXED_CELL))
876 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
877 local->hw.conf.channel->center_freq,
878 ifmgd->ssid, ifmgd->ssid_len);
882 bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY);
883 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
884 privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED);
886 ieee80211_rx_bss_put(local, bss);
888 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
894 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata)
896 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
897 struct ieee80211_local *local = sdata->local;
899 ifmgd->assoc_tries++;
900 if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
901 printk(KERN_DEBUG "%s: association with AP %pM"
903 sdata->dev->name, ifmgd->bssid);
904 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
905 ieee80211_sta_send_apinfo(sdata);
906 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
907 sdata->local->hw.conf.channel->center_freq,
908 ifmgd->ssid, ifmgd->ssid_len);
910 * We might have a pending scan which had no chance to run yet
911 * due to state == IEEE80211_STA_MLME_ASSOCIATE.
912 * Hence, queue the STAs work again
914 queue_work(local->hw.workqueue, &ifmgd->work);
918 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
919 printk(KERN_DEBUG "%s: associate with AP %pM\n",
920 sdata->dev->name, ifmgd->bssid);
921 if (ieee80211_privacy_mismatch(sdata)) {
922 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
923 "mixed-cell disabled - abort association\n", sdata->dev->name);
924 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
928 ieee80211_send_assoc(sdata);
930 mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
934 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
936 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
937 struct ieee80211_local *local = sdata->local;
938 struct sta_info *sta;
941 /* TODO: start monitoring current AP signal quality and number of
942 * missed beacons. Scan other channels every now and then and search
944 /* TODO: remove expired BSSes */
946 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED;
950 sta = sta_info_get(local, ifmgd->bssid);
952 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
953 sdata->dev->name, ifmgd->bssid);
957 if (time_after(jiffies,
958 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
959 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) {
960 printk(KERN_DEBUG "%s: No ProbeResp from "
961 "current AP %pM - assume out of "
963 sdata->dev->name, ifmgd->bssid);
966 ieee80211_send_probe_req(sdata, ifmgd->bssid,
970 ifmgd->flags ^= IEEE80211_STA_PROBEREQ_POLL;
972 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
973 if (time_after(jiffies, ifmgd->last_probe +
974 IEEE80211_PROBE_INTERVAL)) {
975 ifmgd->last_probe = jiffies;
976 ieee80211_send_probe_req(sdata, ifmgd->bssid,
987 ieee80211_set_disassoc(sdata, true, true,
988 WLAN_REASON_PREV_AUTH_NOT_VALID);
990 mod_timer(&ifmgd->timer, jiffies +
991 IEEE80211_MONITORING_INTERVAL);
995 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata)
997 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
999 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1000 ifmgd->flags |= IEEE80211_STA_AUTHENTICATED;
1001 ieee80211_associate(sdata);
1005 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1006 struct ieee80211_mgmt *mgmt,
1010 struct ieee802_11_elems elems;
1012 pos = mgmt->u.auth.variable;
1013 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1014 if (!elems.challenge)
1016 ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg,
1017 elems.challenge - 2, elems.challenge_len + 2,
1018 sdata->u.mgd.bssid, 1);
1019 sdata->u.mgd.auth_transaction = 4;
1022 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1023 struct ieee80211_mgmt *mgmt,
1026 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1027 u16 auth_alg, auth_transaction, status_code;
1029 if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE)
1035 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1038 if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1041 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1042 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1043 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1045 if (auth_alg != ifmgd->auth_alg ||
1046 auth_transaction != ifmgd->auth_transaction)
1049 if (status_code != WLAN_STATUS_SUCCESS) {
1050 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1052 const int num_algs = ARRAY_SIZE(algs);
1054 algs[0] = algs[1] = algs[2] = 0xff;
1055 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1056 algs[0] = WLAN_AUTH_OPEN;
1057 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1058 algs[1] = WLAN_AUTH_SHARED_KEY;
1059 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1060 algs[2] = WLAN_AUTH_LEAP;
1061 if (ifmgd->auth_alg == WLAN_AUTH_OPEN)
1063 else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY)
1067 for (i = 0; i < num_algs; i++) {
1069 if (pos >= num_algs)
1071 if (algs[pos] == ifmgd->auth_alg ||
1074 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1075 !ieee80211_sta_wep_configured(sdata))
1077 ifmgd->auth_alg = algs[pos];
1084 switch (ifmgd->auth_alg) {
1085 case WLAN_AUTH_OPEN:
1086 case WLAN_AUTH_LEAP:
1087 ieee80211_auth_completed(sdata);
1088 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1090 case WLAN_AUTH_SHARED_KEY:
1091 if (ifmgd->auth_transaction == 4) {
1092 ieee80211_auth_completed(sdata);
1093 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1095 ieee80211_auth_challenge(sdata, mgmt, len);
1101 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1102 struct ieee80211_mgmt *mgmt,
1105 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1111 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1114 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1116 if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED)
1117 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1118 sdata->dev->name, reason_code);
1120 if (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1121 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE ||
1122 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1123 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1124 mod_timer(&ifmgd->timer, jiffies +
1125 IEEE80211_RETRY_AUTH_INTERVAL);
1128 ieee80211_set_disassoc(sdata, true, false, 0);
1129 ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED;
1130 cfg80211_send_rx_deauth(sdata->dev, (u8 *) mgmt, len);
1134 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1135 struct ieee80211_mgmt *mgmt,
1138 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1144 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1147 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1149 if (ifmgd->flags & IEEE80211_STA_ASSOCIATED)
1150 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1151 sdata->dev->name, reason_code);
1153 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1154 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1155 mod_timer(&ifmgd->timer, jiffies +
1156 IEEE80211_RETRY_AUTH_INTERVAL);
1159 ieee80211_set_disassoc(sdata, false, false, reason_code);
1160 cfg80211_send_rx_disassoc(sdata->dev, (u8 *) mgmt, len);
1164 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1165 struct ieee80211_mgmt *mgmt,
1169 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1170 struct ieee80211_local *local = sdata->local;
1171 struct ieee80211_supported_band *sband;
1172 struct sta_info *sta;
1173 u32 rates, basic_rates;
1174 u16 capab_info, status_code, aid;
1175 struct ieee802_11_elems elems;
1176 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1180 bool have_higher_than_11mbit = false, newsta = false;
1181 u16 ap_ht_cap_flags;
1183 /* AssocResp and ReassocResp have identical structure, so process both
1184 * of them in this function. */
1186 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1192 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1195 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1196 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1197 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1199 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1200 "status=%d aid=%d)\n",
1201 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1202 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1204 pos = mgmt->u.assoc_resp.variable;
1205 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1207 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1208 elems.timeout_int && elems.timeout_int_len == 5 &&
1209 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1211 tu = get_unaligned_le32(elems.timeout_int + 1);
1212 ms = tu * 1024 / 1000;
1213 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1214 "comeback duration %u TU (%u ms)\n",
1215 sdata->dev->name, tu, ms);
1216 if (ms > IEEE80211_ASSOC_TIMEOUT)
1217 mod_timer(&ifmgd->timer,
1218 jiffies + msecs_to_jiffies(ms));
1222 if (status_code != WLAN_STATUS_SUCCESS) {
1223 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1224 sdata->dev->name, status_code);
1225 /* if this was a reassociation, ensure we try a "full"
1226 * association next time. This works around some broken APs
1227 * which do not correctly reject reassociation requests. */
1228 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1232 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1233 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1234 "set\n", sdata->dev->name, aid);
1235 aid &= ~(BIT(15) | BIT(14));
1237 if (!elems.supp_rates) {
1238 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1243 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1245 ifmgd->ap_capab = capab_info;
1247 kfree(ifmgd->assocresp_ies);
1248 ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1249 ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL);
1250 if (ifmgd->assocresp_ies)
1251 memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len);
1255 /* Add STA entry for the AP */
1256 sta = sta_info_get(local, ifmgd->bssid);
1260 sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC);
1262 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1263 " the AP\n", sdata->dev->name);
1268 /* update new sta with its last rx activity */
1269 sta->last_rx = jiffies;
1273 * FIXME: Do we really need to update the sta_info's information here?
1274 * We already know about the AP (we found it in our list) so it
1275 * should already be filled with the right info, no?
1276 * As is stands, all this is racy because typically we assume
1277 * the information that is filled in here (except flags) doesn't
1278 * change while a STA structure is alive. As such, it should move
1279 * to between the sta_info_alloc() and sta_info_insert() above.
1282 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1283 WLAN_STA_AUTHORIZED);
1287 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1289 for (i = 0; i < elems.supp_rates_len; i++) {
1290 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1291 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1294 have_higher_than_11mbit = true;
1296 for (j = 0; j < sband->n_bitrates; j++) {
1297 if (sband->bitrates[j].bitrate == rate) {
1300 basic_rates |= BIT(j);
1306 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1307 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1308 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1311 have_higher_than_11mbit = true;
1313 for (j = 0; j < sband->n_bitrates; j++) {
1314 if (sband->bitrates[j].bitrate == rate) {
1317 basic_rates |= BIT(j);
1323 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1324 sdata->vif.bss_conf.basic_rates = basic_rates;
1326 /* cf. IEEE 802.11 9.2.12 */
1327 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1328 have_higher_than_11mbit)
1329 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1331 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1333 /* If TKIP/WEP is used, no need to parse AP's HT capabilities */
1334 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1335 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1336 elems.ht_cap_elem, &sta->sta.ht_cap);
1338 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1340 rate_control_rate_init(sta);
1342 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1343 set_sta_flags(sta, WLAN_STA_MFP);
1345 if (elems.wmm_param)
1346 set_sta_flags(sta, WLAN_STA_WME);
1349 int err = sta_info_insert(sta);
1351 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1352 " the AP (error %d)\n", sdata->dev->name, err);
1360 if (elems.wmm_param)
1361 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1362 elems.wmm_param_len);
1364 if (elems.ht_info_elem && elems.wmm_param &&
1365 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1366 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1367 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1370 /* set AID and assoc capability,
1371 * ieee80211_set_associated() will tell the driver */
1372 bss_conf->aid = aid;
1373 bss_conf->assoc_capability = capab_info;
1374 ieee80211_set_associated(sdata, changed);
1376 ieee80211_associated(sdata);
1377 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1381 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1382 struct ieee80211_mgmt *mgmt,
1384 struct ieee80211_rx_status *rx_status,
1385 struct ieee802_11_elems *elems,
1388 struct ieee80211_local *local = sdata->local;
1390 struct ieee80211_bss *bss;
1391 struct ieee80211_channel *channel;
1393 if (elems->ds_params && elems->ds_params_len == 1)
1394 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1396 freq = rx_status->freq;
1398 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1400 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1403 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1408 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1409 (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) {
1410 struct ieee80211_channel_sw_ie *sw_elem =
1411 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1412 ieee80211_process_chanswitch(sdata, sw_elem, bss);
1415 ieee80211_rx_bss_put(local, bss);
1419 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1420 struct ieee80211_mgmt *mgmt,
1422 struct ieee80211_rx_status *rx_status)
1425 struct ieee802_11_elems elems;
1427 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1428 return; /* ignore ProbeResp to foreign address */
1430 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1434 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1437 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1439 /* direct probe may be part of the association flow */
1440 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1441 &sdata->u.mgd.request)) {
1442 printk(KERN_DEBUG "%s direct probe responded\n",
1444 ieee80211_authenticate(sdata);
1448 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1449 struct ieee80211_mgmt *mgmt,
1451 struct ieee80211_rx_status *rx_status)
1453 struct ieee80211_if_managed *ifmgd;
1455 struct ieee802_11_elems elems;
1456 struct ieee80211_local *local = sdata->local;
1458 bool erp_valid, directed_tim;
1461 /* Process beacon from the current BSS */
1462 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1466 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1468 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
1470 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1473 ifmgd = &sdata->u.mgd;
1475 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) ||
1476 memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1479 if (rx_status->freq != local->hw.conf.channel->center_freq)
1482 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1483 elems.wmm_param_len);
1485 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1486 directed_tim = ieee80211_check_tim(&elems, ifmgd->aid);
1489 if (local->hw.conf.dynamic_ps_timeout > 0) {
1490 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1491 ieee80211_hw_config(local,
1492 IEEE80211_CONF_CHANGE_PS);
1493 ieee80211_send_nullfunc(local, sdata, 0);
1495 local->pspolling = true;
1498 * Here is assumed that the driver will be
1499 * able to send ps-poll frame and receive a
1500 * response even though power save mode is
1501 * enabled, but some drivers might require
1502 * to disable power save here. This needs
1503 * to be investigated.
1505 ieee80211_send_pspoll(local, sdata);
1510 if (elems.erp_info && elems.erp_info_len >= 1) {
1512 erp_value = elems.erp_info[0];
1516 changed |= ieee80211_handle_bss_capability(sdata,
1517 le16_to_cpu(mgmt->u.beacon.capab_info),
1518 erp_valid, erp_value);
1521 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1522 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) {
1523 struct sta_info *sta;
1524 struct ieee80211_supported_band *sband;
1525 u16 ap_ht_cap_flags;
1529 sta = sta_info_get(local, ifmgd->bssid);
1535 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1537 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1538 elems.ht_cap_elem, &sta->sta.ht_cap);
1540 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1544 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1548 if (elems.country_elem) {
1549 /* Note we are only reviewing this on beacons
1550 * for the BSSID we are associated to */
1551 regulatory_hint_11d(local->hw.wiphy,
1552 elems.country_elem, elems.country_elem_len);
1554 /* TODO: IBSS also needs this */
1555 if (elems.pwr_constr_elem)
1556 ieee80211_handle_pwr_constr(sdata,
1557 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1558 elems.pwr_constr_elem,
1559 elems.pwr_constr_elem_len);
1562 ieee80211_bss_info_change_notify(sdata, changed);
1565 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1566 struct sk_buff *skb,
1567 struct ieee80211_rx_status *rx_status)
1569 struct ieee80211_local *local = sdata->local;
1570 struct ieee80211_mgmt *mgmt;
1574 return RX_DROP_MONITOR;
1576 mgmt = (struct ieee80211_mgmt *) skb->data;
1577 fc = le16_to_cpu(mgmt->frame_control);
1579 switch (fc & IEEE80211_FCTL_STYPE) {
1580 case IEEE80211_STYPE_PROBE_REQ:
1581 case IEEE80211_STYPE_PROBE_RESP:
1582 case IEEE80211_STYPE_BEACON:
1583 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1584 case IEEE80211_STYPE_AUTH:
1585 case IEEE80211_STYPE_ASSOC_RESP:
1586 case IEEE80211_STYPE_REASSOC_RESP:
1587 case IEEE80211_STYPE_DEAUTH:
1588 case IEEE80211_STYPE_DISASSOC:
1589 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1590 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
1594 return RX_DROP_MONITOR;
1597 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1598 struct sk_buff *skb)
1600 struct ieee80211_rx_status *rx_status;
1601 struct ieee80211_mgmt *mgmt;
1604 rx_status = (struct ieee80211_rx_status *) skb->cb;
1605 mgmt = (struct ieee80211_mgmt *) skb->data;
1606 fc = le16_to_cpu(mgmt->frame_control);
1608 switch (fc & IEEE80211_FCTL_STYPE) {
1609 case IEEE80211_STYPE_PROBE_RESP:
1610 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
1613 case IEEE80211_STYPE_BEACON:
1614 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1617 case IEEE80211_STYPE_AUTH:
1618 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
1620 case IEEE80211_STYPE_ASSOC_RESP:
1621 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0);
1623 case IEEE80211_STYPE_REASSOC_RESP:
1624 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1);
1626 case IEEE80211_STYPE_DEAUTH:
1627 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1629 case IEEE80211_STYPE_DISASSOC:
1630 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1637 static void ieee80211_sta_timer(unsigned long data)
1639 struct ieee80211_sub_if_data *sdata =
1640 (struct ieee80211_sub_if_data *) data;
1641 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1642 struct ieee80211_local *local = sdata->local;
1644 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1645 queue_work(local->hw.workqueue, &ifmgd->work);
1648 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata)
1650 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1651 struct ieee80211_local *local = sdata->local;
1653 if (local->ops->reset_tsf) {
1654 /* Reset own TSF to allow time synchronization work. */
1655 local->ops->reset_tsf(local_to_hw(local));
1658 ifmgd->wmm_last_param_set = -1; /* allow any WMM update */
1661 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1662 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1663 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1664 ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY;
1665 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1666 ifmgd->auth_alg = WLAN_AUTH_LEAP;
1668 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1669 ifmgd->auth_transaction = -1;
1670 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
1671 ifmgd->assoc_scan_tries = 0;
1672 ifmgd->direct_probe_tries = 0;
1673 ifmgd->auth_tries = 0;
1674 ifmgd->assoc_tries = 0;
1675 netif_tx_stop_all_queues(sdata->dev);
1676 netif_carrier_off(sdata->dev);
1679 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata)
1681 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1682 struct ieee80211_local *local = sdata->local;
1683 struct ieee80211_bss *bss;
1684 u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid;
1685 u8 ssid_len = ifmgd->ssid_len;
1686 u16 capa_mask = WLAN_CAPABILITY_ESS;
1687 u16 capa_val = WLAN_CAPABILITY_ESS;
1688 struct ieee80211_channel *chan = local->oper_channel;
1690 if (ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL |
1691 IEEE80211_STA_AUTO_BSSID_SEL |
1692 IEEE80211_STA_AUTO_CHANNEL_SEL)) {
1693 capa_mask |= WLAN_CAPABILITY_PRIVACY;
1694 if (sdata->default_key)
1695 capa_val |= WLAN_CAPABILITY_PRIVACY;
1698 if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
1701 if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL)
1704 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) {
1709 bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
1710 bssid, ssid, ssid_len,
1711 capa_mask, capa_val);
1714 ieee80211_set_freq(sdata, bss->cbss.channel->center_freq);
1715 if (!(ifmgd->flags & IEEE80211_STA_SSID_SET))
1716 ieee80211_sta_set_ssid(sdata, bss->ssid,
1718 ieee80211_sta_set_bssid(sdata, bss->cbss.bssid);
1719 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
1721 if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED)
1722 sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED;
1724 sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED;
1726 /* Send out direct probe if no probe resp was received or
1727 * the one we have is outdated
1729 if (!bss->last_probe_resp ||
1730 time_after(jiffies, bss->last_probe_resp
1731 + IEEE80211_SCAN_RESULT_EXPIRE))
1732 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1734 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
1736 ieee80211_rx_bss_put(local, bss);
1737 ieee80211_sta_reset_auth(sdata);
1740 if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
1741 ifmgd->assoc_scan_tries++;
1742 /* XXX maybe racy? */
1743 if (local->scan_req)
1745 memcpy(local->int_scan_req.ssids[0].ssid,
1746 ifmgd->ssid, IEEE80211_MAX_SSID_LEN);
1747 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL)
1748 local->int_scan_req.ssids[0].ssid_len = 0;
1750 local->int_scan_req.ssids[0].ssid_len = ifmgd->ssid_len;
1752 if (ieee80211_start_scan(sdata, &local->int_scan_req))
1753 ieee80211_scan_failed(local);
1755 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
1756 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
1758 ifmgd->assoc_scan_tries = 0;
1759 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1766 static void ieee80211_sta_work(struct work_struct *work)
1768 struct ieee80211_sub_if_data *sdata =
1769 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
1770 struct ieee80211_local *local = sdata->local;
1771 struct ieee80211_if_managed *ifmgd;
1772 struct sk_buff *skb;
1774 if (!netif_running(sdata->dev))
1777 if (local->sw_scanning || local->hw_scanning)
1780 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1782 ifmgd = &sdata->u.mgd;
1784 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
1785 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1787 if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
1788 ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE &&
1789 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE &&
1790 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) {
1792 * The call to ieee80211_start_scan can fail but ieee80211_request_scan
1793 * (which queued ieee80211_sta_work) did not return an error. Thus, call
1794 * ieee80211_scan_failed here if ieee80211_start_scan fails in order to
1795 * notify the scan requester.
1797 if (ieee80211_start_scan(sdata, local->scan_req))
1798 ieee80211_scan_failed(local);
1802 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) {
1803 if (ieee80211_sta_config_auth(sdata))
1805 clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1806 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request))
1809 switch (ifmgd->state) {
1810 case IEEE80211_STA_MLME_DISABLED:
1812 case IEEE80211_STA_MLME_DIRECT_PROBE:
1813 ieee80211_direct_probe(sdata);
1815 case IEEE80211_STA_MLME_AUTHENTICATE:
1816 ieee80211_authenticate(sdata);
1818 case IEEE80211_STA_MLME_ASSOCIATE:
1819 ieee80211_associate(sdata);
1821 case IEEE80211_STA_MLME_ASSOCIATED:
1822 ieee80211_associated(sdata);
1829 if (ieee80211_privacy_mismatch(sdata)) {
1830 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
1831 "mixed-cell disabled - disassociate\n", sdata->dev->name);
1833 ieee80211_set_disassoc(sdata, false, true,
1834 WLAN_REASON_UNSPECIFIED);
1838 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
1840 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1841 queue_work(sdata->local->hw.workqueue,
1842 &sdata->u.mgd.work);
1845 /* interface setup */
1846 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
1848 struct ieee80211_if_managed *ifmgd;
1850 ifmgd = &sdata->u.mgd;
1851 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
1852 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1853 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
1854 (unsigned long) sdata);
1855 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
1856 (unsigned long) sdata);
1857 skb_queue_head_init(&ifmgd->skb_queue);
1859 ifmgd->capab = WLAN_CAPABILITY_ESS;
1860 ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN |
1861 IEEE80211_AUTH_ALG_SHARED_KEY;
1862 ifmgd->flags |= IEEE80211_STA_CREATE_IBSS |
1863 IEEE80211_STA_AUTO_BSSID_SEL |
1864 IEEE80211_STA_AUTO_CHANNEL_SEL;
1865 if (sdata->local->hw.queues >= 4)
1866 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
1869 /* configuration hooks */
1870 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata)
1872 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1873 struct ieee80211_local *local = sdata->local;
1875 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1878 if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET |
1879 IEEE80211_STA_AUTO_BSSID_SEL)) &&
1880 (ifmgd->flags & (IEEE80211_STA_SSID_SET |
1881 IEEE80211_STA_AUTO_SSID_SEL))) {
1883 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)
1884 ieee80211_set_disassoc(sdata, true, true,
1885 WLAN_REASON_DEAUTH_LEAVING);
1887 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
1888 queue_work(local->hw.workqueue, &ifmgd->work);
1892 int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata)
1894 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1896 if (ifmgd->ssid_len)
1897 ifmgd->flags |= IEEE80211_STA_SSID_SET;
1899 ifmgd->flags &= ~IEEE80211_STA_SSID_SET;
1904 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
1906 struct ieee80211_if_managed *ifmgd;
1908 if (len > IEEE80211_MAX_SSID_LEN)
1911 ifmgd = &sdata->u.mgd;
1913 if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) {
1915 * Do not use reassociation if SSID is changed (different ESS).
1917 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1918 memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid));
1919 memcpy(ifmgd->ssid, ssid, len);
1920 ifmgd->ssid_len = len;
1923 return ieee80211_sta_commit(sdata);
1926 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
1928 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1929 memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len);
1930 *len = ifmgd->ssid_len;
1934 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
1936 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1938 if (is_valid_ether_addr(bssid)) {
1939 memcpy(ifmgd->bssid, bssid, ETH_ALEN);
1940 ifmgd->flags |= IEEE80211_STA_BSSID_SET;
1942 memset(ifmgd->bssid, 0, ETH_ALEN);
1943 ifmgd->flags &= ~IEEE80211_STA_BSSID_SET;
1946 if (netif_running(sdata->dev)) {
1947 if (ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID)) {
1948 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
1949 "the low-level driver\n", sdata->dev->name);
1953 return ieee80211_sta_commit(sdata);
1956 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
1958 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1960 kfree(ifmgd->extra_ie);
1962 ifmgd->extra_ie = NULL;
1963 ifmgd->extra_ie_len = 0;
1966 ifmgd->extra_ie = kmalloc(len, GFP_KERNEL);
1967 if (!ifmgd->extra_ie) {
1968 ifmgd->extra_ie_len = 0;
1971 memcpy(ifmgd->extra_ie, ie, len);
1972 ifmgd->extra_ie_len = len;
1976 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
1978 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
1979 sdata->dev->name, reason);
1981 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1984 ieee80211_set_disassoc(sdata, true, true, reason);
1988 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
1990 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1992 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
1993 sdata->dev->name, reason);
1995 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1998 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED))
2001 ieee80211_set_disassoc(sdata, false, true, reason);
2005 /* scan finished notification */
2006 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2008 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2010 /* Restart STA timers */
2012 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2013 ieee80211_restart_sta_timer(sdata);
2017 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
2019 struct ieee80211_local *local =
2020 container_of(work, struct ieee80211_local,
2021 dynamic_ps_disable_work);
2023 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2024 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2025 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2028 ieee80211_wake_queues_by_reason(&local->hw,
2029 IEEE80211_QUEUE_STOP_REASON_PS);
2032 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
2034 struct ieee80211_local *local =
2035 container_of(work, struct ieee80211_local,
2036 dynamic_ps_enable_work);
2037 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2039 if (local->hw.conf.flags & IEEE80211_CONF_PS)
2042 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
2043 ieee80211_send_nullfunc(local, sdata, 1);
2045 local->hw.conf.flags |= IEEE80211_CONF_PS;
2046 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2049 void ieee80211_dynamic_ps_timer(unsigned long data)
2051 struct ieee80211_local *local = (void *) data;
2053 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
2056 void ieee80211_send_nullfunc(struct ieee80211_local *local,
2057 struct ieee80211_sub_if_data *sdata,
2060 struct sk_buff *skb;
2061 struct ieee80211_hdr *nullfunc;
2064 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2067 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
2069 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
2070 "frame\n", sdata->dev->name);
2073 skb_reserve(skb, local->hw.extra_tx_headroom);
2075 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
2076 memset(nullfunc, 0, 24);
2077 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
2078 IEEE80211_FCTL_TODS);
2080 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
2081 nullfunc->frame_control = fc;
2082 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2083 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
2084 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
2086 ieee80211_tx_skb(sdata, skb, 0);