2 * BSS client mode implementation
3 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.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/wireless.h>
19 #include <linux/random.h>
20 #include <linux/etherdevice.h>
21 #include <linux/rtnetlink.h>
22 #include <net/iw_handler.h>
23 #include <net/mac80211.h>
24 #include <asm/unaligned.h>
26 #include "ieee80211_i.h"
30 #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
31 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
32 #define IEEE80211_AUTH_MAX_TRIES 3
33 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
34 #define IEEE80211_ASSOC_MAX_TRIES 3
35 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
36 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
37 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
38 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
39 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
40 #define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
42 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
43 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
45 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
49 static int ecw2cw(int ecw)
51 return (1 << ecw) - 1;
54 static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
61 end = pos + bss->ies_len;
63 while (pos + 1 < end) {
64 if (pos + 2 + pos[1] > end)
74 static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
75 struct ieee80211_supported_band *sband,
81 for (i = 0; i < bss->supp_rates_len; i++) {
82 int rate = (bss->supp_rates[i] & 0x7F) * 5;
84 for (j = 0; j < sband->n_bitrates; j++)
85 if (sband->bitrates[j].bitrate == rate) {
95 /* also used by mesh code */
96 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
97 struct ieee802_11_elems *elems,
98 enum ieee80211_band band)
100 struct ieee80211_supported_band *sband;
101 struct ieee80211_rate *bitrates;
105 sband = local->hw.wiphy->bands[band];
109 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
112 bitrates = sband->bitrates;
113 num_rates = sband->n_bitrates;
115 for (i = 0; i < elems->supp_rates_len +
116 elems->ext_supp_rates_len; i++) {
119 if (i < elems->supp_rates_len)
120 rate = elems->supp_rates[i];
121 else if (elems->ext_supp_rates)
122 rate = elems->ext_supp_rates
123 [i - elems->supp_rates_len];
124 own_rate = 5 * (rate & 0x7f);
125 for (j = 0; j < num_rates; j++)
126 if (bitrates[j].bitrate == own_rate)
127 supp_rates |= BIT(j);
132 /* frame sending functions */
134 /* also used by scanning code */
135 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
136 u8 *ssid, size_t ssid_len)
138 struct ieee80211_local *local = sdata->local;
139 struct ieee80211_supported_band *sband;
141 struct ieee80211_mgmt *mgmt;
142 u8 *pos, *supp_rates, *esupp_rates = NULL;
145 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
147 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
148 "request\n", sdata->dev->name);
151 skb_reserve(skb, local->hw.extra_tx_headroom);
153 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
155 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
156 IEEE80211_STYPE_PROBE_REQ);
157 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
159 memcpy(mgmt->da, dst, ETH_ALEN);
160 memcpy(mgmt->bssid, dst, ETH_ALEN);
162 memset(mgmt->da, 0xff, ETH_ALEN);
163 memset(mgmt->bssid, 0xff, ETH_ALEN);
165 pos = skb_put(skb, 2 + ssid_len);
166 *pos++ = WLAN_EID_SSID;
168 memcpy(pos, ssid, ssid_len);
170 supp_rates = skb_put(skb, 2);
171 supp_rates[0] = WLAN_EID_SUPP_RATES;
173 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
175 for (i = 0; i < sband->n_bitrates; i++) {
176 struct ieee80211_rate *rate = &sband->bitrates[i];
178 pos = skb_put(skb, 1);
180 } else if (supp_rates[1] == 8) {
181 esupp_rates = skb_put(skb, 3);
182 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
184 pos = &esupp_rates[2];
186 pos = skb_put(skb, 1);
189 *pos = rate->bitrate / 5;
192 ieee80211_tx_skb(sdata, skb, 0);
195 static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
196 struct ieee80211_if_sta *ifsta,
197 int transaction, u8 *extra, size_t extra_len,
200 struct ieee80211_local *local = sdata->local;
202 struct ieee80211_mgmt *mgmt;
204 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
205 sizeof(*mgmt) + 6 + extra_len);
207 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
208 "frame\n", sdata->dev->name);
211 skb_reserve(skb, local->hw.extra_tx_headroom);
213 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
214 memset(mgmt, 0, 24 + 6);
215 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
216 IEEE80211_STYPE_AUTH);
218 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
219 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
220 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
221 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
222 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
223 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
224 ifsta->auth_transaction = transaction + 1;
225 mgmt->u.auth.status_code = cpu_to_le16(0);
227 memcpy(skb_put(skb, extra_len), extra, extra_len);
229 ieee80211_tx_skb(sdata, skb, encrypt);
232 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
233 struct ieee80211_if_sta *ifsta)
235 struct ieee80211_local *local = sdata->local;
237 struct ieee80211_mgmt *mgmt;
238 u8 *pos, *ies, *ht_ie;
239 int i, len, count, rates_len, supp_rates_len;
241 struct ieee80211_bss *bss;
243 struct ieee80211_supported_band *sband;
246 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
247 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
250 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
251 "frame\n", sdata->dev->name);
254 skb_reserve(skb, local->hw.extra_tx_headroom);
256 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
258 capab = ifsta->capab;
260 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
261 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
262 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
263 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
264 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
267 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
268 local->hw.conf.channel->center_freq,
269 ifsta->ssid, ifsta->ssid_len);
271 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
272 capab |= WLAN_CAPABILITY_PRIVACY;
276 /* get all rates supported by the device and the AP as
277 * some APs don't like getting a superset of their rates
278 * in the association request (e.g. D-Link DAP 1353 in
280 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
282 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
283 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
284 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
286 ieee80211_rx_bss_put(local, bss);
289 rates_len = sband->n_bitrates;
292 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
294 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
295 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
296 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
298 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
300 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
301 IEEE80211_STYPE_REASSOC_REQ);
302 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
303 mgmt->u.reassoc_req.listen_interval =
304 cpu_to_le16(local->hw.conf.listen_interval);
305 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
309 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
310 IEEE80211_STYPE_ASSOC_REQ);
311 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
312 mgmt->u.assoc_req.listen_interval =
313 cpu_to_le16(local->hw.conf.listen_interval);
317 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
318 *pos++ = WLAN_EID_SSID;
319 *pos++ = ifsta->ssid_len;
320 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
322 /* add all rates which were marked to be used above */
323 supp_rates_len = rates_len;
324 if (supp_rates_len > 8)
327 len = sband->n_bitrates;
328 pos = skb_put(skb, supp_rates_len + 2);
329 *pos++ = WLAN_EID_SUPP_RATES;
330 *pos++ = supp_rates_len;
333 for (i = 0; i < sband->n_bitrates; i++) {
334 if (BIT(i) & rates) {
335 int rate = sband->bitrates[i].bitrate;
336 *pos++ = (u8) (rate / 5);
342 if (rates_len > count) {
343 pos = skb_put(skb, rates_len - count + 2);
344 *pos++ = WLAN_EID_EXT_SUPP_RATES;
345 *pos++ = rates_len - count;
347 for (i++; i < sband->n_bitrates; i++) {
348 if (BIT(i) & rates) {
349 int rate = sband->bitrates[i].bitrate;
350 *pos++ = (u8) (rate / 5);
355 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
356 /* 1. power capabilities */
357 pos = skb_put(skb, 4);
358 *pos++ = WLAN_EID_PWR_CAPABILITY;
360 *pos++ = 0; /* min tx power */
361 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
363 /* 2. supported channels */
364 /* TODO: get this in reg domain format */
365 pos = skb_put(skb, 2 * sband->n_channels + 2);
366 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
367 *pos++ = 2 * sband->n_channels;
368 for (i = 0; i < sband->n_channels; i++) {
369 *pos++ = ieee80211_frequency_to_channel(
370 sband->channels[i].center_freq);
371 *pos++ = 1; /* one channel in the subband*/
375 if (ifsta->extra_ie) {
376 pos = skb_put(skb, ifsta->extra_ie_len);
377 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
380 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
381 pos = skb_put(skb, 9);
382 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
383 *pos++ = 7; /* len */
384 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
387 *pos++ = 2; /* WME */
388 *pos++ = 0; /* WME info */
389 *pos++ = 1; /* WME ver */
393 /* wmm support is a must to HT */
395 * IEEE802.11n does not allow TKIP/WEP as pairwise
396 * ciphers in HT mode. We still associate in non-ht
397 * mode (11a/b/g) if any one of these ciphers is
398 * configured as pairwise.
400 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
401 sband->ht_cap.ht_supported &&
402 (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) &&
403 ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
404 (!(ifsta->flags & IEEE80211_STA_TKIP_WEP_USED))) {
405 struct ieee80211_ht_info *ht_info =
406 (struct ieee80211_ht_info *)(ht_ie + 2);
407 u16 cap = sband->ht_cap.cap;
409 u32 flags = local->hw.conf.channel->flags;
411 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
412 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
413 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
414 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
415 cap &= ~IEEE80211_HT_CAP_SGI_40;
418 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
419 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
420 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
421 cap &= ~IEEE80211_HT_CAP_SGI_40;
426 tmp = cpu_to_le16(cap);
427 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
428 *pos++ = WLAN_EID_HT_CAPABILITY;
429 *pos++ = sizeof(struct ieee80211_ht_cap);
430 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
431 memcpy(pos, &tmp, sizeof(u16));
433 /* TODO: needs a define here for << 2 */
434 *pos++ = sband->ht_cap.ampdu_factor |
435 (sband->ht_cap.ampdu_density << 2);
436 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
439 kfree(ifsta->assocreq_ies);
440 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
441 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
442 if (ifsta->assocreq_ies)
443 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
445 ieee80211_tx_skb(sdata, skb, 0);
449 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
450 u16 stype, u16 reason)
452 struct ieee80211_local *local = sdata->local;
453 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
455 struct ieee80211_mgmt *mgmt;
457 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
459 printk(KERN_DEBUG "%s: failed to allocate buffer for "
460 "deauth/disassoc frame\n", sdata->dev->name);
463 skb_reserve(skb, local->hw.extra_tx_headroom);
465 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
467 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
468 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
469 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
470 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
472 /* u.deauth.reason_code == u.disassoc.reason_code */
473 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
475 ieee80211_tx_skb(sdata, skb, 0);
479 static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
480 struct ieee80211_bss *bss)
482 struct ieee80211_local *local = sdata->local;
483 int i, have_higher_than_11mbit = 0;
485 /* cf. IEEE 802.11 9.2.12 */
486 for (i = 0; i < bss->supp_rates_len; i++)
487 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
488 have_higher_than_11mbit = 1;
490 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
491 have_higher_than_11mbit)
492 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
494 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
496 ieee80211_set_wmm_default(sdata);
499 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
500 struct ieee80211_if_sta *ifsta,
501 u8 *wmm_param, size_t wmm_param_len)
503 struct ieee80211_tx_queue_params params;
508 if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
514 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
516 count = wmm_param[6] & 0x0f;
517 if (count == ifsta->wmm_last_param_set)
519 ifsta->wmm_last_param_set = count;
522 left = wmm_param_len - 8;
524 memset(¶ms, 0, sizeof(params));
526 if (!local->ops->conf_tx)
530 for (; left >= 4; left -= 4, pos += 4) {
531 int aci = (pos[0] >> 5) & 0x03;
532 int acm = (pos[0] >> 4) & 0x01;
539 local->wmm_acm |= BIT(0) | BIT(3);
544 local->wmm_acm |= BIT(4) | BIT(5);
549 local->wmm_acm |= BIT(6) | BIT(7);
555 local->wmm_acm |= BIT(1) | BIT(2);
559 params.aifs = pos[0] & 0x0f;
560 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
561 params.cw_min = ecw2cw(pos[1] & 0x0f);
562 params.txop = get_unaligned_le16(pos + 2);
563 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
564 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
565 "cWmin=%d cWmax=%d txop=%d\n",
566 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
567 params.cw_max, params.txop);
569 /* TODO: handle ACM (block TX, fallback to next lowest allowed
571 if (local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) {
572 printk(KERN_DEBUG "%s: failed to set TX queue "
573 "parameters for queue %d\n", local->mdev->name, queue);
578 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
579 u16 capab, bool erp_valid, u8 erp)
581 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
582 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
583 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
587 bool use_short_preamble;
591 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
592 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
594 use_protection = false;
595 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
598 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
600 if (use_protection != bss_conf->use_cts_prot) {
601 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
602 if (net_ratelimit()) {
603 printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
605 use_protection ? "enabled" : "disabled",
609 bss_conf->use_cts_prot = use_protection;
610 changed |= BSS_CHANGED_ERP_CTS_PROT;
613 if (use_short_preamble != bss_conf->use_short_preamble) {
614 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
615 if (net_ratelimit()) {
616 printk(KERN_DEBUG "%s: switched to %s barker preamble"
619 use_short_preamble ? "short" : "long",
623 bss_conf->use_short_preamble = use_short_preamble;
624 changed |= BSS_CHANGED_ERP_PREAMBLE;
627 if (use_short_slot != bss_conf->use_short_slot) {
628 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
629 if (net_ratelimit()) {
630 printk(KERN_DEBUG "%s: switched to %s slot time"
633 use_short_slot ? "short" : "long",
637 bss_conf->use_short_slot = use_short_slot;
638 changed |= BSS_CHANGED_ERP_SLOT;
644 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata,
645 struct ieee80211_if_sta *ifsta)
647 union iwreq_data wrqu;
648 memset(&wrqu, 0, sizeof(wrqu));
649 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
650 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
651 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
652 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
655 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata,
656 struct ieee80211_if_sta *ifsta)
661 union iwreq_data wrqu;
663 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
666 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
667 ifsta->assocresp_ies_len), GFP_KERNEL);
671 len = sprintf(buf, "ASSOCINFO(");
672 if (ifsta->assocreq_ies) {
673 len += sprintf(buf + len, "ReqIEs=");
674 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
675 len += sprintf(buf + len, "%02x",
676 ifsta->assocreq_ies[i]);
679 if (ifsta->assocresp_ies) {
680 if (ifsta->assocreq_ies)
681 len += sprintf(buf + len, " ");
682 len += sprintf(buf + len, "RespIEs=");
683 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
684 len += sprintf(buf + len, "%02x",
685 ifsta->assocresp_ies[i]);
688 len += sprintf(buf + len, ")");
690 if (len > IW_CUSTOM_MAX) {
691 len = sprintf(buf, "ASSOCRESPIE=");
692 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
693 len += sprintf(buf + len, "%02x",
694 ifsta->assocresp_ies[i]);
698 if (len <= IW_CUSTOM_MAX) {
699 memset(&wrqu, 0, sizeof(wrqu));
700 wrqu.data.length = len;
701 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
708 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
709 struct ieee80211_if_sta *ifsta,
710 u32 bss_info_changed)
712 struct ieee80211_local *local = sdata->local;
713 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
715 struct ieee80211_bss *bss;
717 bss_info_changed |= BSS_CHANGED_ASSOC;
718 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
720 if (sdata->vif.type != NL80211_IFTYPE_STATION)
723 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
724 conf->channel->center_freq,
725 ifsta->ssid, ifsta->ssid_len);
727 /* set timing information */
728 sdata->vif.bss_conf.beacon_int = bss->beacon_int;
729 sdata->vif.bss_conf.timestamp = bss->timestamp;
730 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
732 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
733 bss->capability, bss->has_erp_value, bss->erp_value);
735 ieee80211_rx_bss_put(local, bss);
738 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
739 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
740 ieee80211_sta_send_associnfo(sdata, ifsta);
742 ifsta->last_probe = jiffies;
743 ieee80211_led_assoc(local, 1);
745 sdata->vif.bss_conf.assoc = 1;
747 * For now just always ask the driver to update the basic rateset
748 * when we have associated, we aren't checking whether it actually
751 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
752 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
754 if (local->powersave &&
755 !(local->hw.flags & IEEE80211_HW_NO_STACK_DYNAMIC_PS)) {
756 if (local->dynamic_ps_timeout > 0)
757 mod_timer(&local->dynamic_ps_timer, jiffies +
758 msecs_to_jiffies(local->dynamic_ps_timeout));
760 conf->flags |= IEEE80211_CONF_PS;
761 ieee80211_hw_config(local,
762 IEEE80211_CONF_CHANGE_PS);
766 netif_tx_start_all_queues(sdata->dev);
767 netif_carrier_on(sdata->dev);
769 ieee80211_sta_send_apinfo(sdata, ifsta);
772 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
773 struct ieee80211_if_sta *ifsta)
775 ifsta->direct_probe_tries++;
776 if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
777 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
778 sdata->dev->name, ifsta->bssid);
779 ifsta->state = IEEE80211_STA_MLME_DISABLED;
780 ieee80211_sta_send_apinfo(sdata, ifsta);
784 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
785 sdata->dev->name, ifsta->bssid,
786 ifsta->direct_probe_tries);
788 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
790 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request);
792 /* Direct probe is sent to broadcast address as some APs
793 * will not answer to direct packet in unassociated state.
795 ieee80211_send_probe_req(sdata, NULL,
796 ifsta->ssid, ifsta->ssid_len);
798 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
802 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
803 struct ieee80211_if_sta *ifsta)
806 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
807 printk(KERN_DEBUG "%s: authentication with AP %pM"
809 sdata->dev->name, ifsta->bssid);
810 ifsta->state = IEEE80211_STA_MLME_DISABLED;
811 ieee80211_sta_send_apinfo(sdata, ifsta);
815 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
816 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
817 sdata->dev->name, ifsta->bssid);
819 ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
821 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
825 * The disassoc 'reason' argument can be either our own reason
826 * if self disconnected or a reason code from the AP.
828 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
829 struct ieee80211_if_sta *ifsta, bool deauth,
830 bool self_disconnected, u16 reason)
832 struct ieee80211_local *local = sdata->local;
833 struct sta_info *sta;
834 u32 changed = 0, config_changed = 0;
838 sta = sta_info_get(local, ifsta->bssid);
845 ifsta->direct_probe_tries = 0;
846 ifsta->auth_tries = 0;
848 ifsta->assoc_scan_tries = 0;
849 ifsta->assoc_tries = 0;
851 netif_tx_stop_all_queues(sdata->dev);
852 netif_carrier_off(sdata->dev);
854 ieee80211_sta_tear_down_BA_sessions(sdata, sta->sta.addr);
856 if (self_disconnected) {
858 ieee80211_send_deauth_disassoc(sdata,
859 IEEE80211_STYPE_DEAUTH, reason);
861 ieee80211_send_deauth_disassoc(sdata,
862 IEEE80211_STYPE_DISASSOC, reason);
865 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
866 changed |= ieee80211_reset_erp_info(sdata);
868 ieee80211_led_assoc(local, 0);
869 changed |= BSS_CHANGED_ASSOC;
870 sdata->vif.bss_conf.assoc = false;
872 ieee80211_sta_send_apinfo(sdata, ifsta);
874 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT)
875 ifsta->state = IEEE80211_STA_MLME_DISABLED;
879 local->hw.conf.ht.enabled = false;
880 local->oper_channel_type = NL80211_CHAN_NO_HT;
881 config_changed |= IEEE80211_CONF_CHANGE_HT;
883 del_timer_sync(&local->dynamic_ps_timer);
884 cancel_work_sync(&local->dynamic_ps_enable_work);
886 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
887 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
888 config_changed |= IEEE80211_CONF_CHANGE_PS;
891 ieee80211_hw_config(local, config_changed);
892 ieee80211_bss_info_change_notify(sdata, changed);
896 sta = sta_info_get(local, ifsta->bssid);
902 sta_info_unlink(&sta);
906 sta_info_destroy(sta);
909 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
911 if (!sdata || !sdata->default_key ||
912 sdata->default_key->conf.alg != ALG_WEP)
917 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
918 struct ieee80211_if_sta *ifsta)
920 struct ieee80211_local *local = sdata->local;
921 struct ieee80211_bss *bss;
926 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
929 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
930 local->hw.conf.channel->center_freq,
931 ifsta->ssid, ifsta->ssid_len);
935 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
936 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
937 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
939 ieee80211_rx_bss_put(local, bss);
941 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
947 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
948 struct ieee80211_if_sta *ifsta)
950 ifsta->assoc_tries++;
951 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
952 printk(KERN_DEBUG "%s: association with AP %pM"
954 sdata->dev->name, ifsta->bssid);
955 ifsta->state = IEEE80211_STA_MLME_DISABLED;
956 ieee80211_sta_send_apinfo(sdata, ifsta);
960 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
961 printk(KERN_DEBUG "%s: associate with AP %pM\n",
962 sdata->dev->name, ifsta->bssid);
963 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
964 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
965 "mixed-cell disabled - abort association\n", sdata->dev->name);
966 ifsta->state = IEEE80211_STA_MLME_DISABLED;
970 ieee80211_send_assoc(sdata, ifsta);
972 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
976 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
977 struct ieee80211_if_sta *ifsta)
979 struct ieee80211_local *local = sdata->local;
980 struct sta_info *sta;
983 /* TODO: start monitoring current AP signal quality and number of
984 * missed beacons. Scan other channels every now and then and search
986 /* TODO: remove expired BSSes */
988 ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
992 sta = sta_info_get(local, ifsta->bssid);
994 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
995 sdata->dev->name, ifsta->bssid);
999 if (time_after(jiffies,
1000 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
1001 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
1002 printk(KERN_DEBUG "%s: No ProbeResp from "
1003 "current AP %pM - assume out of "
1005 sdata->dev->name, ifsta->bssid);
1008 ieee80211_send_probe_req(sdata, ifsta->bssid,
1011 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
1013 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1014 if (time_after(jiffies, ifsta->last_probe +
1015 IEEE80211_PROBE_INTERVAL)) {
1016 ifsta->last_probe = jiffies;
1017 ieee80211_send_probe_req(sdata, ifsta->bssid,
1027 ieee80211_set_disassoc(sdata, ifsta, true, true,
1028 WLAN_REASON_PREV_AUTH_NOT_VALID);
1030 mod_timer(&ifsta->timer, jiffies +
1031 IEEE80211_MONITORING_INTERVAL);
1035 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
1036 struct ieee80211_if_sta *ifsta)
1038 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1039 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1040 ieee80211_associate(sdata, ifsta);
1044 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1045 struct ieee80211_if_sta *ifsta,
1046 struct ieee80211_mgmt *mgmt,
1050 struct ieee802_11_elems elems;
1052 pos = mgmt->u.auth.variable;
1053 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1054 if (!elems.challenge)
1056 ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
1057 elems.challenge_len + 2, 1);
1060 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1061 struct ieee80211_if_sta *ifsta,
1062 struct ieee80211_mgmt *mgmt,
1065 u16 auth_alg, auth_transaction, status_code;
1067 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
1068 sdata->vif.type != NL80211_IFTYPE_ADHOC)
1074 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
1075 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1078 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
1079 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1082 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1083 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1084 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1086 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
1088 * IEEE 802.11 standard does not require authentication in IBSS
1089 * networks and most implementations do not seem to use it.
1090 * However, try to reply to authentication attempts if someone
1091 * has actually implemented this.
1093 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
1095 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
1098 if (auth_alg != ifsta->auth_alg ||
1099 auth_transaction != ifsta->auth_transaction)
1102 if (status_code != WLAN_STATUS_SUCCESS) {
1103 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1105 const int num_algs = ARRAY_SIZE(algs);
1107 algs[0] = algs[1] = algs[2] = 0xff;
1108 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1109 algs[0] = WLAN_AUTH_OPEN;
1110 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1111 algs[1] = WLAN_AUTH_SHARED_KEY;
1112 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1113 algs[2] = WLAN_AUTH_LEAP;
1114 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1116 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1120 for (i = 0; i < num_algs; i++) {
1122 if (pos >= num_algs)
1124 if (algs[pos] == ifsta->auth_alg ||
1127 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1128 !ieee80211_sta_wep_configured(sdata))
1130 ifsta->auth_alg = algs[pos];
1137 switch (ifsta->auth_alg) {
1138 case WLAN_AUTH_OPEN:
1139 case WLAN_AUTH_LEAP:
1140 ieee80211_auth_completed(sdata, ifsta);
1142 case WLAN_AUTH_SHARED_KEY:
1143 if (ifsta->auth_transaction == 4)
1144 ieee80211_auth_completed(sdata, ifsta);
1146 ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
1152 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1153 struct ieee80211_if_sta *ifsta,
1154 struct ieee80211_mgmt *mgmt,
1162 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1165 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1167 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
1168 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1169 sdata->dev->name, reason_code);
1171 if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1172 ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
1173 ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1174 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1175 mod_timer(&ifsta->timer, jiffies +
1176 IEEE80211_RETRY_AUTH_INTERVAL);
1179 ieee80211_set_disassoc(sdata, ifsta, true, false, 0);
1180 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1184 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1185 struct ieee80211_if_sta *ifsta,
1186 struct ieee80211_mgmt *mgmt,
1194 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1197 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1199 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1200 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1201 sdata->dev->name, reason_code);
1203 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1204 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
1205 mod_timer(&ifsta->timer, jiffies +
1206 IEEE80211_RETRY_AUTH_INTERVAL);
1209 ieee80211_set_disassoc(sdata, ifsta, false, false, reason_code);
1213 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1214 struct ieee80211_if_sta *ifsta,
1215 struct ieee80211_mgmt *mgmt,
1219 struct ieee80211_local *local = sdata->local;
1220 struct ieee80211_supported_band *sband;
1221 struct sta_info *sta;
1222 u64 rates, basic_rates;
1223 u16 capab_info, status_code, aid;
1224 struct ieee802_11_elems elems;
1225 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1229 bool have_higher_than_11mbit = false, newsta = false;
1230 u16 ap_ht_cap_flags;
1232 /* AssocResp and ReassocResp have identical structure, so process both
1233 * of them in this function. */
1235 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
1241 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1244 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1245 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1246 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1248 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1249 "status=%d aid=%d)\n",
1250 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1251 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1253 if (status_code != WLAN_STATUS_SUCCESS) {
1254 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1255 sdata->dev->name, status_code);
1256 /* if this was a reassociation, ensure we try a "full"
1257 * association next time. This works around some broken APs
1258 * which do not correctly reject reassociation requests. */
1259 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1263 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1264 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1265 "set\n", sdata->dev->name, aid);
1266 aid &= ~(BIT(15) | BIT(14));
1268 pos = mgmt->u.assoc_resp.variable;
1269 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1271 if (!elems.supp_rates) {
1272 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1277 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1279 ifsta->ap_capab = capab_info;
1281 kfree(ifsta->assocresp_ies);
1282 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1283 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1284 if (ifsta->assocresp_ies)
1285 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1289 /* Add STA entry for the AP */
1290 sta = sta_info_get(local, ifsta->bssid);
1292 struct ieee80211_bss *bss;
1296 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1298 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1299 " the AP\n", sdata->dev->name);
1303 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
1304 local->hw.conf.channel->center_freq,
1305 ifsta->ssid, ifsta->ssid_len);
1307 sta->last_signal = bss->signal;
1308 sta->last_qual = bss->qual;
1309 sta->last_noise = bss->noise;
1310 ieee80211_rx_bss_put(local, bss);
1313 /* update new sta with its last rx activity */
1314 sta->last_rx = jiffies;
1318 * FIXME: Do we really need to update the sta_info's information here?
1319 * We already know about the AP (we found it in our list) so it
1320 * should already be filled with the right info, no?
1321 * As is stands, all this is racy because typically we assume
1322 * the information that is filled in here (except flags) doesn't
1323 * change while a STA structure is alive. As such, it should move
1324 * to between the sta_info_alloc() and sta_info_insert() above.
1327 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1328 WLAN_STA_AUTHORIZED);
1332 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1334 for (i = 0; i < elems.supp_rates_len; i++) {
1335 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1336 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1339 have_higher_than_11mbit = true;
1341 for (j = 0; j < sband->n_bitrates; j++) {
1342 if (sband->bitrates[j].bitrate == rate) {
1345 basic_rates |= BIT(j);
1351 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1352 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1353 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1356 have_higher_than_11mbit = true;
1358 for (j = 0; j < sband->n_bitrates; j++) {
1359 if (sband->bitrates[j].bitrate == rate) {
1362 basic_rates |= BIT(j);
1368 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1369 sdata->vif.bss_conf.basic_rates = basic_rates;
1371 /* cf. IEEE 802.11 9.2.12 */
1372 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1373 have_higher_than_11mbit)
1374 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1376 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1378 if (elems.ht_cap_elem)
1379 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1380 elems.ht_cap_elem, &sta->sta.ht_cap);
1382 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1384 rate_control_rate_init(sta);
1386 if (elems.wmm_param)
1387 set_sta_flags(sta, WLAN_STA_WME);
1390 int err = sta_info_insert(sta);
1392 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1393 " the AP (error %d)\n", sdata->dev->name, err);
1401 if (elems.wmm_param)
1402 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1403 elems.wmm_param_len);
1405 if (elems.ht_info_elem && elems.wmm_param &&
1406 (ifsta->flags & IEEE80211_STA_WMM_ENABLED))
1407 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1410 /* set AID and assoc capability,
1411 * ieee80211_set_associated() will tell the driver */
1412 bss_conf->aid = aid;
1413 bss_conf->assoc_capability = capab_info;
1414 ieee80211_set_associated(sdata, ifsta, changed);
1416 ieee80211_associated(sdata, ifsta);
1420 static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
1421 struct ieee80211_if_sta *ifsta,
1422 struct ieee80211_bss *bss)
1424 struct ieee80211_local *local = sdata->local;
1425 int res, rates, i, j;
1426 struct sk_buff *skb;
1427 struct ieee80211_mgmt *mgmt;
1429 struct ieee80211_supported_band *sband;
1430 union iwreq_data wrqu;
1432 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
1434 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1435 "response\n", sdata->dev->name);
1439 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1441 /* Remove possible STA entries from other IBSS networks. */
1442 sta_info_flush_delayed(sdata);
1444 if (local->ops->reset_tsf) {
1445 /* Reset own TSF to allow time synchronization work. */
1446 local->ops->reset_tsf(local_to_hw(local));
1448 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
1449 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
1453 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
1455 sdata->drop_unencrypted = bss->capability &
1456 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
1458 res = ieee80211_set_freq(sdata, bss->freq);
1463 /* Build IBSS probe response */
1465 skb_reserve(skb, local->hw.extra_tx_headroom);
1467 mgmt = (struct ieee80211_mgmt *)
1468 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
1469 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
1470 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1471 IEEE80211_STYPE_PROBE_RESP);
1472 memset(mgmt->da, 0xff, ETH_ALEN);
1473 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1474 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1475 mgmt->u.beacon.beacon_int =
1476 cpu_to_le16(local->hw.conf.beacon_int);
1477 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
1478 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
1480 pos = skb_put(skb, 2 + ifsta->ssid_len);
1481 *pos++ = WLAN_EID_SSID;
1482 *pos++ = ifsta->ssid_len;
1483 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
1485 rates = bss->supp_rates_len;
1488 pos = skb_put(skb, 2 + rates);
1489 *pos++ = WLAN_EID_SUPP_RATES;
1491 memcpy(pos, bss->supp_rates, rates);
1493 if (bss->band == IEEE80211_BAND_2GHZ) {
1494 pos = skb_put(skb, 2 + 1);
1495 *pos++ = WLAN_EID_DS_PARAMS;
1497 *pos++ = ieee80211_frequency_to_channel(bss->freq);
1500 pos = skb_put(skb, 2 + 2);
1501 *pos++ = WLAN_EID_IBSS_PARAMS;
1503 /* FIX: set ATIM window based on scan results */
1507 if (bss->supp_rates_len > 8) {
1508 rates = bss->supp_rates_len - 8;
1509 pos = skb_put(skb, 2 + rates);
1510 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1512 memcpy(pos, &bss->supp_rates[8], rates);
1515 ifsta->probe_resp = skb;
1517 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
1521 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1522 for (i = 0; i < bss->supp_rates_len; i++) {
1523 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
1524 for (j = 0; j < sband->n_bitrates; j++)
1525 if (sband->bitrates[j].bitrate == bitrate)
1528 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
1530 ieee80211_sta_def_wmm_params(sdata, bss);
1532 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
1533 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1535 ieee80211_led_assoc(local, true);
1537 memset(&wrqu, 0, sizeof(wrqu));
1538 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
1539 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
1544 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1545 struct ieee80211_mgmt *mgmt,
1547 struct ieee80211_rx_status *rx_status,
1548 struct ieee802_11_elems *elems,
1551 struct ieee80211_local *local = sdata->local;
1553 struct ieee80211_bss *bss;
1554 struct sta_info *sta;
1555 struct ieee80211_channel *channel;
1556 u64 beacon_timestamp, rx_timestamp;
1558 enum ieee80211_band band = rx_status->band;
1560 if (elems->ds_params && elems->ds_params_len == 1)
1561 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1563 freq = rx_status->freq;
1565 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1567 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1570 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && elems->supp_rates &&
1571 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1572 supp_rates = ieee80211_sta_get_rates(local, elems, band);
1576 sta = sta_info_get(local, mgmt->sa);
1580 prev_rates = sta->sta.supp_rates[band];
1581 /* make sure mandatory rates are always added */
1582 sta->sta.supp_rates[band] = supp_rates |
1583 ieee80211_mandatory_rates(local, band);
1585 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1586 if (sta->sta.supp_rates[band] != prev_rates)
1587 printk(KERN_DEBUG "%s: updated supp_rates set "
1588 "for %pM based on beacon info (0x%llx | "
1589 "0x%llx -> 0x%llx)\n",
1592 (unsigned long long) prev_rates,
1593 (unsigned long long) supp_rates,
1594 (unsigned long long) sta->sta.supp_rates[band]);
1597 ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates);
1603 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1608 /* was just updated in ieee80211_bss_info_update */
1609 beacon_timestamp = bss->timestamp;
1612 * In STA mode, the remaining parameters should not be overridden
1613 * by beacons because they're not necessarily accurate there.
1615 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
1616 bss->last_probe_resp && beacon) {
1617 ieee80211_rx_bss_put(local, bss);
1621 /* check if we need to merge IBSS */
1622 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && beacon &&
1623 bss->capability & WLAN_CAPABILITY_IBSS &&
1624 bss->freq == local->oper_channel->center_freq &&
1625 elems->ssid_len == sdata->u.sta.ssid_len &&
1626 memcmp(elems->ssid, sdata->u.sta.ssid,
1627 sdata->u.sta.ssid_len) == 0) {
1628 if (rx_status->flag & RX_FLAG_TSFT) {
1629 /* in order for correct IBSS merging we need mactime
1631 * since mactime is defined as the time the first data
1632 * symbol of the frame hits the PHY, and the timestamp
1633 * of the beacon is defined as "the time that the data
1634 * symbol containing the first bit of the timestamp is
1635 * transmitted to the PHY plus the transmitting STA’s
1636 * delays through its local PHY from the MAC-PHY
1637 * interface to its interface with the WM"
1638 * (802.11 11.1.2) - equals the time this bit arrives at
1639 * the receiver - we have to take into account the
1640 * offset between the two.
1641 * e.g: at 1 MBit that means mactime is 192 usec earlier
1642 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
1645 if (rx_status->flag & RX_FLAG_HT) {
1646 rate = 65; /* TODO: HT rates */
1648 rate = local->hw.wiphy->bands[band]->
1649 bitrates[rx_status->rate_idx].bitrate;
1651 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
1652 } else if (local && local->ops && local->ops->get_tsf)
1653 /* second best option: get current TSF */
1654 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
1656 /* can't merge without knowing the TSF */
1657 rx_timestamp = -1LLU;
1658 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1659 printk(KERN_DEBUG "RX beacon SA=%pM BSSID="
1660 "%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
1661 mgmt->sa, mgmt->bssid,
1662 (unsigned long long)rx_timestamp,
1663 (unsigned long long)beacon_timestamp,
1664 (unsigned long long)(rx_timestamp - beacon_timestamp),
1666 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1667 if (beacon_timestamp > rx_timestamp) {
1668 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1669 printk(KERN_DEBUG "%s: beacon TSF higher than "
1670 "local TSF - IBSS merge with BSSID %pM\n",
1671 sdata->dev->name, mgmt->bssid);
1673 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
1674 ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates);
1678 ieee80211_rx_bss_put(local, bss);
1682 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1683 struct ieee80211_mgmt *mgmt,
1685 struct ieee80211_rx_status *rx_status)
1688 struct ieee802_11_elems elems;
1689 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1691 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1692 return; /* ignore ProbeResp to foreign address */
1694 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1698 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1701 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1703 /* direct probe may be part of the association flow */
1704 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1706 printk(KERN_DEBUG "%s direct probe responded\n",
1708 ieee80211_authenticate(sdata, ifsta);
1713 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1714 struct ieee80211_mgmt *mgmt,
1716 struct ieee80211_rx_status *rx_status)
1718 struct ieee80211_if_sta *ifsta;
1720 struct ieee802_11_elems elems;
1721 struct ieee80211_local *local = sdata->local;
1726 /* Process beacon from the current BSS */
1727 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1731 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1733 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
1735 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1737 ifsta = &sdata->u.sta;
1739 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
1740 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1743 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1744 elems.wmm_param_len);
1747 if (elems.erp_info && elems.erp_info_len >= 1) {
1749 erp_value = elems.erp_info[0];
1753 changed |= ieee80211_handle_bss_capability(sdata,
1754 le16_to_cpu(mgmt->u.beacon.capab_info),
1755 erp_valid, erp_value);
1758 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param) {
1759 struct sta_info *sta;
1760 struct ieee80211_supported_band *sband;
1761 u16 ap_ht_cap_flags;
1765 sta = sta_info_get(local, ifsta->bssid);
1771 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1773 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1774 elems.ht_cap_elem, &sta->sta.ht_cap);
1776 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1780 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1784 if (elems.country_elem) {
1785 /* Note we are only reviewing this on beacons
1786 * for the BSSID we are associated to */
1787 regulatory_hint_11d(local->hw.wiphy,
1788 elems.country_elem, elems.country_elem_len);
1791 ieee80211_bss_info_change_notify(sdata, changed);
1795 static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
1796 struct ieee80211_if_sta *ifsta,
1797 struct ieee80211_mgmt *mgmt,
1799 struct ieee80211_rx_status *rx_status)
1801 struct ieee80211_local *local = sdata->local;
1803 struct sk_buff *skb;
1804 struct ieee80211_mgmt *resp;
1807 if (sdata->vif.type != NL80211_IFTYPE_ADHOC ||
1808 ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
1809 len < 24 + 2 || !ifsta->probe_resp)
1812 if (local->ops->tx_last_beacon)
1813 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1817 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1818 printk(KERN_DEBUG "%s: RX ProbeReq SA=%pM DA=%pM BSSID=%pM"
1819 " (tx_last_beacon=%d)\n",
1820 sdata->dev->name, mgmt->sa, mgmt->da,
1821 mgmt->bssid, tx_last_beacon);
1822 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1824 if (!tx_last_beacon)
1827 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1828 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1831 end = ((u8 *) mgmt) + len;
1832 pos = mgmt->u.probe_req.variable;
1833 if (pos[0] != WLAN_EID_SSID ||
1834 pos + 2 + pos[1] > end) {
1835 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1836 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
1838 sdata->dev->name, mgmt->sa);
1843 (pos[1] != ifsta->ssid_len ||
1844 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1845 /* Ignore ProbeReq for foreign SSID */
1849 /* Reply with ProbeResp */
1850 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
1854 resp = (struct ieee80211_mgmt *) skb->data;
1855 memcpy(resp->da, mgmt->sa, ETH_ALEN);
1856 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1857 printk(KERN_DEBUG "%s: Sending ProbeResp to %pM\n",
1858 sdata->dev->name, resp->da);
1859 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1860 ieee80211_tx_skb(sdata, skb, 0);
1863 void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
1864 struct ieee80211_rx_status *rx_status)
1866 struct ieee80211_local *local = sdata->local;
1867 struct ieee80211_if_sta *ifsta;
1868 struct ieee80211_mgmt *mgmt;
1874 ifsta = &sdata->u.sta;
1876 mgmt = (struct ieee80211_mgmt *) skb->data;
1877 fc = le16_to_cpu(mgmt->frame_control);
1879 switch (fc & IEEE80211_FCTL_STYPE) {
1880 case IEEE80211_STYPE_PROBE_REQ:
1881 case IEEE80211_STYPE_PROBE_RESP:
1882 case IEEE80211_STYPE_BEACON:
1883 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1884 case IEEE80211_STYPE_AUTH:
1885 case IEEE80211_STYPE_ASSOC_RESP:
1886 case IEEE80211_STYPE_REASSOC_RESP:
1887 case IEEE80211_STYPE_DEAUTH:
1888 case IEEE80211_STYPE_DISASSOC:
1889 skb_queue_tail(&ifsta->skb_queue, skb);
1890 queue_work(local->hw.workqueue, &ifsta->work);
1898 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1899 struct sk_buff *skb)
1901 struct ieee80211_rx_status *rx_status;
1902 struct ieee80211_if_sta *ifsta;
1903 struct ieee80211_mgmt *mgmt;
1906 ifsta = &sdata->u.sta;
1908 rx_status = (struct ieee80211_rx_status *) skb->cb;
1909 mgmt = (struct ieee80211_mgmt *) skb->data;
1910 fc = le16_to_cpu(mgmt->frame_control);
1912 switch (fc & IEEE80211_FCTL_STYPE) {
1913 case IEEE80211_STYPE_PROBE_REQ:
1914 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len,
1917 case IEEE80211_STYPE_PROBE_RESP:
1918 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
1920 case IEEE80211_STYPE_BEACON:
1921 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
1923 case IEEE80211_STYPE_AUTH:
1924 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
1926 case IEEE80211_STYPE_ASSOC_RESP:
1927 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
1929 case IEEE80211_STYPE_REASSOC_RESP:
1930 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
1932 case IEEE80211_STYPE_DEAUTH:
1933 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
1935 case IEEE80211_STYPE_DISASSOC:
1936 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
1944 static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
1946 struct ieee80211_local *local = sdata->local;
1948 struct sta_info *sta;
1952 list_for_each_entry_rcu(sta, &local->sta_list, list) {
1953 if (sta->sdata == sdata &&
1954 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
1967 static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
1968 struct ieee80211_if_sta *ifsta)
1970 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1972 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
1973 if (ieee80211_sta_active_ibss(sdata))
1976 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
1977 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
1978 ieee80211_request_scan(sdata, ifsta->ssid, ifsta->ssid_len);
1982 static void ieee80211_sta_timer(unsigned long data)
1984 struct ieee80211_sub_if_data *sdata =
1985 (struct ieee80211_sub_if_data *) data;
1986 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1987 struct ieee80211_local *local = sdata->local;
1989 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1990 queue_work(local->hw.workqueue, &ifsta->work);
1993 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
1994 struct ieee80211_if_sta *ifsta)
1996 struct ieee80211_local *local = sdata->local;
1998 if (local->ops->reset_tsf) {
1999 /* Reset own TSF to allow time synchronization work. */
2000 local->ops->reset_tsf(local_to_hw(local));
2003 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2006 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2007 ifsta->auth_alg = WLAN_AUTH_OPEN;
2008 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2009 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2010 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2011 ifsta->auth_alg = WLAN_AUTH_LEAP;
2013 ifsta->auth_alg = WLAN_AUTH_OPEN;
2014 ifsta->auth_transaction = -1;
2015 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
2016 ifsta->assoc_scan_tries = 0;
2017 ifsta->direct_probe_tries = 0;
2018 ifsta->auth_tries = 0;
2019 ifsta->assoc_tries = 0;
2020 netif_tx_stop_all_queues(sdata->dev);
2021 netif_carrier_off(sdata->dev);
2025 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2026 const char *ssid, int ssid_len)
2028 int tmp, hidden_ssid;
2030 if (ssid_len == ifsta->ssid_len &&
2031 !memcmp(ifsta->ssid, ssid, ssid_len))
2034 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2040 if (ssid[tmp] != '\0') {
2046 if (hidden_ssid && (ifsta->ssid_len == ssid_len || ssid_len == 0))
2049 if (ssid_len == 1 && ssid[0] == ' ')
2055 static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
2056 struct ieee80211_if_sta *ifsta)
2058 struct ieee80211_local *local = sdata->local;
2059 struct ieee80211_bss *bss;
2060 struct ieee80211_supported_band *sband;
2061 u8 bssid[ETH_ALEN], *pos;
2066 /* Easier testing, use fixed BSSID. */
2067 memset(bssid, 0xfe, ETH_ALEN);
2069 /* Generate random, not broadcast, locally administered BSSID. Mix in
2070 * own MAC address to make sure that devices that do not have proper
2071 * random number generator get different BSSID. */
2072 get_random_bytes(bssid, ETH_ALEN);
2073 for (i = 0; i < ETH_ALEN; i++)
2074 bssid[i] ^= sdata->dev->dev_addr[i];
2079 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %pM\n",
2080 sdata->dev->name, bssid);
2082 bss = ieee80211_rx_bss_add(local, bssid,
2083 local->hw.conf.channel->center_freq,
2084 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
2088 bss->band = local->hw.conf.channel->band;
2089 sband = local->hw.wiphy->bands[bss->band];
2091 if (local->hw.conf.beacon_int == 0)
2092 local->hw.conf.beacon_int = 100;
2093 bss->beacon_int = local->hw.conf.beacon_int;
2094 bss->last_update = jiffies;
2095 bss->capability = WLAN_CAPABILITY_IBSS;
2097 if (sdata->default_key)
2098 bss->capability |= WLAN_CAPABILITY_PRIVACY;
2100 sdata->drop_unencrypted = 0;
2102 bss->supp_rates_len = sband->n_bitrates;
2103 pos = bss->supp_rates;
2104 for (i = 0; i < sband->n_bitrates; i++) {
2105 int rate = sband->bitrates[i].bitrate;
2106 *pos++ = (u8) (rate / 5);
2109 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
2110 ieee80211_rx_bss_put(local, bss);
2115 static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
2116 struct ieee80211_if_sta *ifsta)
2118 struct ieee80211_local *local = sdata->local;
2119 struct ieee80211_bss *bss;
2124 if (ifsta->ssid_len == 0)
2127 active_ibss = ieee80211_sta_active_ibss(sdata);
2128 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2129 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2130 sdata->dev->name, active_ibss);
2131 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2132 spin_lock_bh(&local->bss_lock);
2133 list_for_each_entry(bss, &local->bss_list, list) {
2134 if (ifsta->ssid_len != bss->ssid_len ||
2135 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2136 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2138 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2139 printk(KERN_DEBUG " bssid=%pM found\n", bss->bssid);
2140 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2141 memcpy(bssid, bss->bssid, ETH_ALEN);
2143 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2146 spin_unlock_bh(&local->bss_lock);
2148 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2150 printk(KERN_DEBUG " sta_find_ibss: selected %pM current "
2151 "%pM\n", bssid, ifsta->bssid);
2152 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2154 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2158 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2159 search_freq = bss->freq;
2161 search_freq = local->hw.conf.channel->center_freq;
2163 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
2164 ifsta->ssid, ifsta->ssid_len);
2168 printk(KERN_DEBUG "%s: Selected IBSS BSSID %pM"
2169 " based on configured SSID\n",
2170 sdata->dev->name, bssid);
2171 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
2172 ieee80211_rx_bss_put(local, bss);
2177 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2178 printk(KERN_DEBUG " did not try to join ibss\n");
2179 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2181 /* Selected IBSS not found in current scan results - try to scan */
2182 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
2183 !ieee80211_sta_active_ibss(sdata)) {
2184 mod_timer(&ifsta->timer, jiffies +
2185 IEEE80211_IBSS_MERGE_INTERVAL);
2186 } else if (time_after(jiffies, local->last_scan_completed +
2187 IEEE80211_SCAN_INTERVAL)) {
2188 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
2189 "join\n", sdata->dev->name);
2190 return ieee80211_request_scan(sdata, ifsta->ssid,
2192 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
2193 int interval = IEEE80211_SCAN_INTERVAL;
2195 if (time_after(jiffies, ifsta->ibss_join_req +
2196 IEEE80211_IBSS_JOIN_TIMEOUT)) {
2197 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
2198 (!(local->oper_channel->flags &
2199 IEEE80211_CHAN_NO_IBSS)))
2200 return ieee80211_sta_create_ibss(sdata, ifsta);
2201 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
2202 printk(KERN_DEBUG "%s: IBSS not allowed on"
2203 " %d MHz\n", sdata->dev->name,
2204 local->hw.conf.channel->center_freq);
2207 /* No IBSS found - decrease scan interval and continue
2209 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2212 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2213 mod_timer(&ifsta->timer, jiffies + interval);
2221 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
2222 struct ieee80211_if_sta *ifsta)
2224 struct ieee80211_local *local = sdata->local;
2225 struct ieee80211_bss *bss, *selected = NULL;
2226 int top_rssi = 0, freq;
2228 spin_lock_bh(&local->bss_lock);
2229 freq = local->oper_channel->center_freq;
2230 list_for_each_entry(bss, &local->bss_list, list) {
2231 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2234 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2235 IEEE80211_STA_AUTO_BSSID_SEL |
2236 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
2237 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2238 !!sdata->default_key))
2241 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2245 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2246 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2249 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2250 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2253 if (!selected || top_rssi < bss->signal) {
2255 top_rssi = bss->signal;
2259 atomic_inc(&selected->users);
2260 spin_unlock_bh(&local->bss_lock);
2263 ieee80211_set_freq(sdata, selected->freq);
2264 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2265 ieee80211_sta_set_ssid(sdata, selected->ssid,
2266 selected->ssid_len);
2267 ieee80211_sta_set_bssid(sdata, selected->bssid);
2268 ieee80211_sta_def_wmm_params(sdata, selected);
2270 /* Send out direct probe if no probe resp was received or
2271 * the one we have is outdated
2273 if (!selected->last_probe_resp ||
2274 time_after(jiffies, selected->last_probe_resp
2275 + IEEE80211_SCAN_RESULT_EXPIRE))
2276 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2278 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2280 ieee80211_rx_bss_put(local, selected);
2281 ieee80211_sta_reset_auth(sdata, ifsta);
2284 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2285 ifsta->assoc_scan_tries++;
2286 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
2287 ieee80211_start_scan(sdata, NULL, 0);
2289 ieee80211_start_scan(sdata, ifsta->ssid,
2291 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2292 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2294 ifsta->state = IEEE80211_STA_MLME_DISABLED;
2300 static void ieee80211_sta_work(struct work_struct *work)
2302 struct ieee80211_sub_if_data *sdata =
2303 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2304 struct ieee80211_local *local = sdata->local;
2305 struct ieee80211_if_sta *ifsta;
2306 struct sk_buff *skb;
2308 if (!netif_running(sdata->dev))
2311 if (local->sw_scanning || local->hw_scanning)
2314 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION &&
2315 sdata->vif.type != NL80211_IFTYPE_ADHOC))
2317 ifsta = &sdata->u.sta;
2319 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2320 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2322 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2323 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2324 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
2325 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
2326 ieee80211_start_scan(sdata, ifsta->scan_ssid,
2327 ifsta->scan_ssid_len);
2331 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2332 if (ieee80211_sta_config_auth(sdata, ifsta))
2334 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2335 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2338 switch (ifsta->state) {
2339 case IEEE80211_STA_MLME_DISABLED:
2341 case IEEE80211_STA_MLME_DIRECT_PROBE:
2342 ieee80211_direct_probe(sdata, ifsta);
2344 case IEEE80211_STA_MLME_AUTHENTICATE:
2345 ieee80211_authenticate(sdata, ifsta);
2347 case IEEE80211_STA_MLME_ASSOCIATE:
2348 ieee80211_associate(sdata, ifsta);
2350 case IEEE80211_STA_MLME_ASSOCIATED:
2351 ieee80211_associated(sdata, ifsta);
2353 case IEEE80211_STA_MLME_IBSS_SEARCH:
2354 ieee80211_sta_find_ibss(sdata, ifsta);
2356 case IEEE80211_STA_MLME_IBSS_JOINED:
2357 ieee80211_sta_merge_ibss(sdata, ifsta);
2364 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
2365 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2366 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2368 ieee80211_set_disassoc(sdata, ifsta, false, true,
2369 WLAN_REASON_UNSPECIFIED);
2373 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2375 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2376 queue_work(sdata->local->hw.workqueue,
2377 &sdata->u.sta.work);
2380 /* interface setup */
2381 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2383 struct ieee80211_if_sta *ifsta;
2385 ifsta = &sdata->u.sta;
2386 INIT_WORK(&ifsta->work, ieee80211_sta_work);
2387 setup_timer(&ifsta->timer, ieee80211_sta_timer,
2388 (unsigned long) sdata);
2389 skb_queue_head_init(&ifsta->skb_queue);
2391 ifsta->capab = WLAN_CAPABILITY_ESS;
2392 ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2393 IEEE80211_AUTH_ALG_SHARED_KEY;
2394 ifsta->flags |= IEEE80211_STA_CREATE_IBSS |
2395 IEEE80211_STA_AUTO_BSSID_SEL |
2396 IEEE80211_STA_AUTO_CHANNEL_SEL;
2397 if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4)
2398 ifsta->flags |= IEEE80211_STA_WMM_ENABLED;
2402 * Add a new IBSS station, will also be called by the RX code when,
2403 * in IBSS mode, receiving a frame from a yet-unknown station, hence
2404 * must be callable in atomic context.
2406 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
2407 u8 *bssid,u8 *addr, u64 supp_rates)
2409 struct ieee80211_local *local = sdata->local;
2410 struct sta_info *sta;
2411 int band = local->hw.conf.channel->band;
2413 /* TODO: Could consider removing the least recently used entry and
2414 * allow new one to be added. */
2415 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
2416 if (net_ratelimit()) {
2417 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
2418 "entry %pM\n", sdata->dev->name, addr);
2423 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
2426 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2427 printk(KERN_DEBUG "%s: Adding new IBSS station %pM (dev=%s)\n",
2428 wiphy_name(local->hw.wiphy), addr, sdata->dev->name);
2431 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
2435 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
2437 /* make sure mandatory rates are always added */
2438 sta->sta.supp_rates[band] = supp_rates |
2439 ieee80211_mandatory_rates(local, band);
2441 rate_control_rate_init(sta);
2443 if (sta_info_insert(sta))
2449 /* configuration hooks */
2450 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
2451 struct ieee80211_if_sta *ifsta)
2453 struct ieee80211_local *local = sdata->local;
2455 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2458 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2459 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2460 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2461 IEEE80211_STA_AUTO_SSID_SEL))) {
2463 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED)
2464 ieee80211_set_disassoc(sdata, ifsta, true, true,
2465 WLAN_REASON_DEAUTH_LEAVING);
2467 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2468 queue_work(local->hw.workqueue, &ifsta->work);
2472 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2474 struct ieee80211_if_sta *ifsta;
2476 if (len > IEEE80211_MAX_SSID_LEN)
2479 ifsta = &sdata->u.sta;
2481 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
2482 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
2483 memcpy(ifsta->ssid, ssid, len);
2484 ifsta->ssid_len = len;
2485 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2489 ifsta->flags |= IEEE80211_STA_SSID_SET;
2491 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
2493 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
2494 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
2495 ifsta->ibss_join_req = jiffies;
2496 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2497 return ieee80211_sta_find_ibss(sdata, ifsta);
2503 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2505 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2506 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2507 *len = ifsta->ssid_len;
2511 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2513 struct ieee80211_if_sta *ifsta;
2516 ifsta = &sdata->u.sta;
2518 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2519 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2522 * Hack! See also ieee80211_sta_set_ssid.
2524 if (netif_running(sdata->dev))
2525 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
2527 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2528 "the low-level driver\n", sdata->dev->name);
2533 if (is_valid_ether_addr(bssid))
2534 ifsta->flags |= IEEE80211_STA_BSSID_SET;
2536 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
2541 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
2543 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2545 kfree(ifsta->extra_ie);
2547 ifsta->extra_ie = NULL;
2548 ifsta->extra_ie_len = 0;
2551 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
2552 if (!ifsta->extra_ie) {
2553 ifsta->extra_ie_len = 0;
2556 memcpy(ifsta->extra_ie, ie, len);
2557 ifsta->extra_ie_len = len;
2561 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2563 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2565 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2566 sdata->dev->name, reason);
2568 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
2569 sdata->vif.type != NL80211_IFTYPE_ADHOC)
2572 ieee80211_set_disassoc(sdata, ifsta, true, true, reason);
2576 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2578 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2580 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2581 sdata->dev->name, reason);
2583 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2586 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
2589 ieee80211_set_disassoc(sdata, ifsta, false, true, reason);
2593 /* scan finished notification */
2594 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2596 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2597 struct ieee80211_if_sta *ifsta;
2599 if (sdata && sdata->vif.type == NL80211_IFTYPE_ADHOC) {
2600 ifsta = &sdata->u.sta;
2601 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
2602 (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) &&
2603 !ieee80211_sta_active_ibss(sdata)))
2604 ieee80211_sta_find_ibss(sdata, ifsta);
2607 /* Restart STA timers */
2609 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2610 ieee80211_restart_sta_timer(sdata);
2614 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
2616 struct ieee80211_local *local =
2617 container_of(work, struct ieee80211_local,
2618 dynamic_ps_disable_work);
2620 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2621 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2622 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2625 ieee80211_wake_queues_by_reason(&local->hw,
2626 IEEE80211_QUEUE_STOP_REASON_PS);
2629 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
2631 struct ieee80211_local *local =
2632 container_of(work, struct ieee80211_local,
2633 dynamic_ps_enable_work);
2635 if (local->hw.conf.flags & IEEE80211_CONF_PS)
2638 local->hw.conf.flags |= IEEE80211_CONF_PS;
2640 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2643 void ieee80211_dynamic_ps_timer(unsigned long data)
2645 struct ieee80211_local *local = (void *) data;
2647 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);