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_IBSS_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);
1089 case WLAN_AUTH_SHARED_KEY:
1090 if (ifmgd->auth_transaction == 4)
1091 ieee80211_auth_completed(sdata);
1093 ieee80211_auth_challenge(sdata, mgmt, len);
1099 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1100 struct ieee80211_mgmt *mgmt,
1103 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1109 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1112 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1114 if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED)
1115 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1116 sdata->dev->name, reason_code);
1118 if (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1119 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE ||
1120 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1121 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1122 mod_timer(&ifmgd->timer, jiffies +
1123 IEEE80211_RETRY_AUTH_INTERVAL);
1126 ieee80211_set_disassoc(sdata, true, false, 0);
1127 ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED;
1131 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1132 struct ieee80211_mgmt *mgmt,
1135 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1141 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1144 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1146 if (ifmgd->flags & IEEE80211_STA_ASSOCIATED)
1147 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1148 sdata->dev->name, reason_code);
1150 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1151 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1152 mod_timer(&ifmgd->timer, jiffies +
1153 IEEE80211_RETRY_AUTH_INTERVAL);
1156 ieee80211_set_disassoc(sdata, false, false, reason_code);
1160 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1161 struct ieee80211_mgmt *mgmt,
1165 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1166 struct ieee80211_local *local = sdata->local;
1167 struct ieee80211_supported_band *sband;
1168 struct sta_info *sta;
1169 u32 rates, basic_rates;
1170 u16 capab_info, status_code, aid;
1171 struct ieee802_11_elems elems;
1172 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1176 bool have_higher_than_11mbit = false, newsta = false;
1177 u16 ap_ht_cap_flags;
1179 /* AssocResp and ReassocResp have identical structure, so process both
1180 * of them in this function. */
1182 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1188 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1191 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1192 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1193 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1195 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1196 "status=%d aid=%d)\n",
1197 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1198 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1200 pos = mgmt->u.assoc_resp.variable;
1201 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1203 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1204 elems.timeout_int && elems.timeout_int_len == 5 &&
1205 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1207 tu = get_unaligned_le32(elems.timeout_int + 1);
1208 ms = tu * 1024 / 1000;
1209 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1210 "comeback duration %u TU (%u ms)\n",
1211 sdata->dev->name, tu, ms);
1212 if (ms > IEEE80211_ASSOC_TIMEOUT)
1213 mod_timer(&ifmgd->timer,
1214 jiffies + msecs_to_jiffies(ms));
1218 if (status_code != WLAN_STATUS_SUCCESS) {
1219 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1220 sdata->dev->name, status_code);
1221 /* if this was a reassociation, ensure we try a "full"
1222 * association next time. This works around some broken APs
1223 * which do not correctly reject reassociation requests. */
1224 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1228 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1229 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1230 "set\n", sdata->dev->name, aid);
1231 aid &= ~(BIT(15) | BIT(14));
1233 if (!elems.supp_rates) {
1234 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1239 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1241 ifmgd->ap_capab = capab_info;
1243 kfree(ifmgd->assocresp_ies);
1244 ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1245 ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL);
1246 if (ifmgd->assocresp_ies)
1247 memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len);
1251 /* Add STA entry for the AP */
1252 sta = sta_info_get(local, ifmgd->bssid);
1256 sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC);
1258 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1259 " the AP\n", sdata->dev->name);
1264 /* update new sta with its last rx activity */
1265 sta->last_rx = jiffies;
1269 * FIXME: Do we really need to update the sta_info's information here?
1270 * We already know about the AP (we found it in our list) so it
1271 * should already be filled with the right info, no?
1272 * As is stands, all this is racy because typically we assume
1273 * the information that is filled in here (except flags) doesn't
1274 * change while a STA structure is alive. As such, it should move
1275 * to between the sta_info_alloc() and sta_info_insert() above.
1278 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1279 WLAN_STA_AUTHORIZED);
1283 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1285 for (i = 0; i < elems.supp_rates_len; i++) {
1286 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1287 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1290 have_higher_than_11mbit = true;
1292 for (j = 0; j < sband->n_bitrates; j++) {
1293 if (sband->bitrates[j].bitrate == rate) {
1296 basic_rates |= BIT(j);
1302 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1303 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1304 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1307 have_higher_than_11mbit = true;
1309 for (j = 0; j < sband->n_bitrates; j++) {
1310 if (sband->bitrates[j].bitrate == rate) {
1313 basic_rates |= BIT(j);
1319 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1320 sdata->vif.bss_conf.basic_rates = basic_rates;
1322 /* cf. IEEE 802.11 9.2.12 */
1323 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1324 have_higher_than_11mbit)
1325 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1327 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1329 /* If TKIP/WEP is used, no need to parse AP's HT capabilities */
1330 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1331 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1332 elems.ht_cap_elem, &sta->sta.ht_cap);
1334 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1336 rate_control_rate_init(sta);
1338 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1339 set_sta_flags(sta, WLAN_STA_MFP);
1341 if (elems.wmm_param)
1342 set_sta_flags(sta, WLAN_STA_WME);
1345 int err = sta_info_insert(sta);
1347 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1348 " the AP (error %d)\n", sdata->dev->name, err);
1356 if (elems.wmm_param)
1357 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1358 elems.wmm_param_len);
1360 if (elems.ht_info_elem && elems.wmm_param &&
1361 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1362 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1363 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1366 /* set AID and assoc capability,
1367 * ieee80211_set_associated() will tell the driver */
1368 bss_conf->aid = aid;
1369 bss_conf->assoc_capability = capab_info;
1370 ieee80211_set_associated(sdata, changed);
1372 ieee80211_associated(sdata);
1376 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1377 struct ieee80211_mgmt *mgmt,
1379 struct ieee80211_rx_status *rx_status,
1380 struct ieee802_11_elems *elems,
1383 struct ieee80211_local *local = sdata->local;
1385 struct ieee80211_bss *bss;
1386 struct ieee80211_channel *channel;
1388 if (elems->ds_params && elems->ds_params_len == 1)
1389 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1391 freq = rx_status->freq;
1393 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1395 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1398 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1403 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1404 (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) {
1405 struct ieee80211_channel_sw_ie *sw_elem =
1406 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1407 ieee80211_process_chanswitch(sdata, sw_elem, bss);
1410 ieee80211_rx_bss_put(local, bss);
1414 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1415 struct ieee80211_mgmt *mgmt,
1417 struct ieee80211_rx_status *rx_status)
1420 struct ieee802_11_elems elems;
1422 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1423 return; /* ignore ProbeResp to foreign address */
1425 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1429 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1432 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1434 /* direct probe may be part of the association flow */
1435 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1436 &sdata->u.mgd.request)) {
1437 printk(KERN_DEBUG "%s direct probe responded\n",
1439 ieee80211_authenticate(sdata);
1443 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1444 struct ieee80211_mgmt *mgmt,
1446 struct ieee80211_rx_status *rx_status)
1448 struct ieee80211_if_managed *ifmgd;
1450 struct ieee802_11_elems elems;
1451 struct ieee80211_local *local = sdata->local;
1453 bool erp_valid, directed_tim;
1456 /* Process beacon from the current BSS */
1457 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1461 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1463 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
1465 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1468 ifmgd = &sdata->u.mgd;
1470 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) ||
1471 memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1474 if (rx_status->freq != local->hw.conf.channel->center_freq)
1477 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1478 elems.wmm_param_len);
1480 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1481 directed_tim = ieee80211_check_tim(&elems, ifmgd->aid);
1484 if (local->hw.conf.dynamic_ps_timeout > 0) {
1485 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1486 ieee80211_hw_config(local,
1487 IEEE80211_CONF_CHANGE_PS);
1488 ieee80211_send_nullfunc(local, sdata, 0);
1490 local->pspolling = true;
1493 * Here is assumed that the driver will be
1494 * able to send ps-poll frame and receive a
1495 * response even though power save mode is
1496 * enabled, but some drivers might require
1497 * to disable power save here. This needs
1498 * to be investigated.
1500 ieee80211_send_pspoll(local, sdata);
1505 if (elems.erp_info && elems.erp_info_len >= 1) {
1507 erp_value = elems.erp_info[0];
1511 changed |= ieee80211_handle_bss_capability(sdata,
1512 le16_to_cpu(mgmt->u.beacon.capab_info),
1513 erp_valid, erp_value);
1516 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1517 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) {
1518 struct sta_info *sta;
1519 struct ieee80211_supported_band *sband;
1520 u16 ap_ht_cap_flags;
1524 sta = sta_info_get(local, ifmgd->bssid);
1530 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1532 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1533 elems.ht_cap_elem, &sta->sta.ht_cap);
1535 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1539 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1543 if (elems.country_elem) {
1544 /* Note we are only reviewing this on beacons
1545 * for the BSSID we are associated to */
1546 regulatory_hint_11d(local->hw.wiphy,
1547 elems.country_elem, elems.country_elem_len);
1549 /* TODO: IBSS also needs this */
1550 if (elems.pwr_constr_elem)
1551 ieee80211_handle_pwr_constr(sdata,
1552 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1553 elems.pwr_constr_elem,
1554 elems.pwr_constr_elem_len);
1557 ieee80211_bss_info_change_notify(sdata, changed);
1560 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1561 struct sk_buff *skb,
1562 struct ieee80211_rx_status *rx_status)
1564 struct ieee80211_local *local = sdata->local;
1565 struct ieee80211_mgmt *mgmt;
1569 return RX_DROP_MONITOR;
1571 mgmt = (struct ieee80211_mgmt *) skb->data;
1572 fc = le16_to_cpu(mgmt->frame_control);
1574 switch (fc & IEEE80211_FCTL_STYPE) {
1575 case IEEE80211_STYPE_PROBE_REQ:
1576 case IEEE80211_STYPE_PROBE_RESP:
1577 case IEEE80211_STYPE_BEACON:
1578 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1579 case IEEE80211_STYPE_AUTH:
1580 case IEEE80211_STYPE_ASSOC_RESP:
1581 case IEEE80211_STYPE_REASSOC_RESP:
1582 case IEEE80211_STYPE_DEAUTH:
1583 case IEEE80211_STYPE_DISASSOC:
1584 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1585 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
1589 return RX_DROP_MONITOR;
1592 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1593 struct sk_buff *skb)
1595 struct ieee80211_rx_status *rx_status;
1596 struct ieee80211_mgmt *mgmt;
1599 rx_status = (struct ieee80211_rx_status *) skb->cb;
1600 mgmt = (struct ieee80211_mgmt *) skb->data;
1601 fc = le16_to_cpu(mgmt->frame_control);
1603 switch (fc & IEEE80211_FCTL_STYPE) {
1604 case IEEE80211_STYPE_PROBE_RESP:
1605 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
1608 case IEEE80211_STYPE_BEACON:
1609 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1612 case IEEE80211_STYPE_AUTH:
1613 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
1615 case IEEE80211_STYPE_ASSOC_RESP:
1616 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0);
1618 case IEEE80211_STYPE_REASSOC_RESP:
1619 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1);
1621 case IEEE80211_STYPE_DEAUTH:
1622 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1624 case IEEE80211_STYPE_DISASSOC:
1625 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1632 static void ieee80211_sta_timer(unsigned long data)
1634 struct ieee80211_sub_if_data *sdata =
1635 (struct ieee80211_sub_if_data *) data;
1636 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1637 struct ieee80211_local *local = sdata->local;
1639 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1640 queue_work(local->hw.workqueue, &ifmgd->work);
1643 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata)
1645 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1646 struct ieee80211_local *local = sdata->local;
1648 if (local->ops->reset_tsf) {
1649 /* Reset own TSF to allow time synchronization work. */
1650 local->ops->reset_tsf(local_to_hw(local));
1653 ifmgd->wmm_last_param_set = -1; /* allow any WMM update */
1656 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1657 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1658 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1659 ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY;
1660 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1661 ifmgd->auth_alg = WLAN_AUTH_LEAP;
1663 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1664 ifmgd->auth_transaction = -1;
1665 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
1666 ifmgd->assoc_scan_tries = 0;
1667 ifmgd->direct_probe_tries = 0;
1668 ifmgd->auth_tries = 0;
1669 ifmgd->assoc_tries = 0;
1670 netif_tx_stop_all_queues(sdata->dev);
1671 netif_carrier_off(sdata->dev);
1674 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata)
1676 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1677 struct ieee80211_local *local = sdata->local;
1678 struct ieee80211_bss *bss;
1679 u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid;
1680 u8 ssid_len = ifmgd->ssid_len;
1681 u16 capa_mask = WLAN_CAPABILITY_ESS;
1682 u16 capa_val = WLAN_CAPABILITY_ESS;
1683 struct ieee80211_channel *chan = local->oper_channel;
1685 if (ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL |
1686 IEEE80211_STA_AUTO_BSSID_SEL |
1687 IEEE80211_STA_AUTO_CHANNEL_SEL)) {
1688 capa_mask |= WLAN_CAPABILITY_PRIVACY;
1689 if (sdata->default_key)
1690 capa_val |= WLAN_CAPABILITY_PRIVACY;
1693 if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
1696 if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL)
1699 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) {
1704 bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
1705 bssid, ssid, ssid_len,
1706 capa_mask, capa_val);
1709 ieee80211_set_freq(sdata, bss->cbss.channel->center_freq);
1710 if (!(ifmgd->flags & IEEE80211_STA_SSID_SET))
1711 ieee80211_sta_set_ssid(sdata, bss->ssid,
1713 ieee80211_sta_set_bssid(sdata, bss->cbss.bssid);
1714 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
1716 if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED)
1717 sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED;
1719 sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED;
1721 /* Send out direct probe if no probe resp was received or
1722 * the one we have is outdated
1724 if (!bss->last_probe_resp ||
1725 time_after(jiffies, bss->last_probe_resp
1726 + IEEE80211_SCAN_RESULT_EXPIRE))
1727 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1729 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
1731 ieee80211_rx_bss_put(local, bss);
1732 ieee80211_sta_reset_auth(sdata);
1735 if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
1736 ifmgd->assoc_scan_tries++;
1737 /* XXX maybe racy? */
1738 if (local->scan_req)
1740 memcpy(local->int_scan_req.ssids[0].ssid,
1741 ifmgd->ssid, IEEE80211_MAX_SSID_LEN);
1742 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL)
1743 local->int_scan_req.ssids[0].ssid_len = 0;
1745 local->int_scan_req.ssids[0].ssid_len = ifmgd->ssid_len;
1747 if (ieee80211_start_scan(sdata, &local->int_scan_req))
1748 ieee80211_scan_failed(local);
1750 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
1751 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
1753 ifmgd->assoc_scan_tries = 0;
1754 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1761 static void ieee80211_sta_work(struct work_struct *work)
1763 struct ieee80211_sub_if_data *sdata =
1764 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
1765 struct ieee80211_local *local = sdata->local;
1766 struct ieee80211_if_managed *ifmgd;
1767 struct sk_buff *skb;
1769 if (!netif_running(sdata->dev))
1772 if (local->sw_scanning || local->hw_scanning)
1775 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1777 ifmgd = &sdata->u.mgd;
1779 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
1780 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1782 if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
1783 ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE &&
1784 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE &&
1785 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) {
1787 * The call to ieee80211_start_scan can fail but ieee80211_request_scan
1788 * (which queued ieee80211_sta_work) did not return an error. Thus, call
1789 * ieee80211_scan_failed here if ieee80211_start_scan fails in order to
1790 * notify the scan requester.
1792 if (ieee80211_start_scan(sdata, local->scan_req))
1793 ieee80211_scan_failed(local);
1797 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) {
1798 if (ieee80211_sta_config_auth(sdata))
1800 clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1801 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request))
1804 switch (ifmgd->state) {
1805 case IEEE80211_STA_MLME_DISABLED:
1807 case IEEE80211_STA_MLME_DIRECT_PROBE:
1808 ieee80211_direct_probe(sdata);
1810 case IEEE80211_STA_MLME_AUTHENTICATE:
1811 ieee80211_authenticate(sdata);
1813 case IEEE80211_STA_MLME_ASSOCIATE:
1814 ieee80211_associate(sdata);
1816 case IEEE80211_STA_MLME_ASSOCIATED:
1817 ieee80211_associated(sdata);
1824 if (ieee80211_privacy_mismatch(sdata)) {
1825 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
1826 "mixed-cell disabled - disassociate\n", sdata->dev->name);
1828 ieee80211_set_disassoc(sdata, false, true,
1829 WLAN_REASON_UNSPECIFIED);
1833 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
1835 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1836 queue_work(sdata->local->hw.workqueue,
1837 &sdata->u.mgd.work);
1840 /* interface setup */
1841 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
1843 struct ieee80211_if_managed *ifmgd;
1845 ifmgd = &sdata->u.mgd;
1846 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
1847 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1848 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
1849 (unsigned long) sdata);
1850 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
1851 (unsigned long) sdata);
1852 skb_queue_head_init(&ifmgd->skb_queue);
1854 ifmgd->capab = WLAN_CAPABILITY_ESS;
1855 ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN |
1856 IEEE80211_AUTH_ALG_SHARED_KEY;
1857 ifmgd->flags |= IEEE80211_STA_CREATE_IBSS |
1858 IEEE80211_STA_AUTO_BSSID_SEL |
1859 IEEE80211_STA_AUTO_CHANNEL_SEL;
1860 if (sdata->local->hw.queues >= 4)
1861 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
1864 /* configuration hooks */
1865 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata)
1867 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1868 struct ieee80211_local *local = sdata->local;
1870 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1873 if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET |
1874 IEEE80211_STA_AUTO_BSSID_SEL)) &&
1875 (ifmgd->flags & (IEEE80211_STA_SSID_SET |
1876 IEEE80211_STA_AUTO_SSID_SEL))) {
1878 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)
1879 ieee80211_set_disassoc(sdata, true, true,
1880 WLAN_REASON_DEAUTH_LEAVING);
1882 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
1883 queue_work(local->hw.workqueue, &ifmgd->work);
1887 int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata)
1889 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1891 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1893 if (ifmgd->ssid_len)
1894 ifmgd->flags |= IEEE80211_STA_SSID_SET;
1896 ifmgd->flags &= ~IEEE80211_STA_SSID_SET;
1901 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
1903 struct ieee80211_if_managed *ifmgd;
1905 if (len > IEEE80211_MAX_SSID_LEN)
1908 ifmgd = &sdata->u.mgd;
1910 if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) {
1911 memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid));
1912 memcpy(ifmgd->ssid, ssid, len);
1913 ifmgd->ssid_len = len;
1916 return ieee80211_sta_commit(sdata);
1919 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
1921 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1922 memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len);
1923 *len = ifmgd->ssid_len;
1927 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
1929 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1931 if (is_valid_ether_addr(bssid)) {
1932 memcpy(ifmgd->bssid, bssid, ETH_ALEN);
1933 ifmgd->flags |= IEEE80211_STA_BSSID_SET;
1935 memset(ifmgd->bssid, 0, ETH_ALEN);
1936 ifmgd->flags &= ~IEEE80211_STA_BSSID_SET;
1939 if (netif_running(sdata->dev)) {
1940 if (ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID)) {
1941 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
1942 "the low-level driver\n", sdata->dev->name);
1946 return ieee80211_sta_commit(sdata);
1949 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
1951 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1953 kfree(ifmgd->extra_ie);
1955 ifmgd->extra_ie = NULL;
1956 ifmgd->extra_ie_len = 0;
1959 ifmgd->extra_ie = kmalloc(len, GFP_KERNEL);
1960 if (!ifmgd->extra_ie) {
1961 ifmgd->extra_ie_len = 0;
1964 memcpy(ifmgd->extra_ie, ie, len);
1965 ifmgd->extra_ie_len = len;
1969 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
1971 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
1972 sdata->dev->name, reason);
1974 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1977 ieee80211_set_disassoc(sdata, true, true, reason);
1981 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
1983 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1985 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
1986 sdata->dev->name, reason);
1988 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1991 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED))
1994 ieee80211_set_disassoc(sdata, false, true, reason);
1998 /* scan finished notification */
1999 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2001 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2003 /* Restart STA timers */
2005 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2006 ieee80211_restart_sta_timer(sdata);
2010 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
2012 struct ieee80211_local *local =
2013 container_of(work, struct ieee80211_local,
2014 dynamic_ps_disable_work);
2016 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2017 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2018 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2021 ieee80211_wake_queues_by_reason(&local->hw,
2022 IEEE80211_QUEUE_STOP_REASON_PS);
2025 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
2027 struct ieee80211_local *local =
2028 container_of(work, struct ieee80211_local,
2029 dynamic_ps_enable_work);
2030 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2032 if (local->hw.conf.flags & IEEE80211_CONF_PS)
2035 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
2036 ieee80211_send_nullfunc(local, sdata, 1);
2038 local->hw.conf.flags |= IEEE80211_CONF_PS;
2039 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2042 void ieee80211_dynamic_ps_timer(unsigned long data)
2044 struct ieee80211_local *local = (void *) data;
2046 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
2049 void ieee80211_send_nullfunc(struct ieee80211_local *local,
2050 struct ieee80211_sub_if_data *sdata,
2053 struct sk_buff *skb;
2054 struct ieee80211_hdr *nullfunc;
2057 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2060 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
2062 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
2063 "frame\n", sdata->dev->name);
2066 skb_reserve(skb, local->hw.extra_tx_headroom);
2068 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
2069 memset(nullfunc, 0, 24);
2070 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
2071 IEEE80211_FCTL_TODS);
2073 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
2074 nullfunc->frame_control = fc;
2075 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2076 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
2077 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
2079 ieee80211_tx_skb(sdata, skb, 0);