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 if (local->dynamic_ps_timeout > 0)
756 mod_timer(&local->dynamic_ps_timer, jiffies +
757 msecs_to_jiffies(local->dynamic_ps_timeout));
759 conf->flags |= IEEE80211_CONF_PS;
760 ieee80211_hw_config(local,
761 IEEE80211_CONF_CHANGE_PS);
765 netif_tx_start_all_queues(sdata->dev);
766 netif_carrier_on(sdata->dev);
768 ieee80211_sta_send_apinfo(sdata, ifsta);
771 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
772 struct ieee80211_if_sta *ifsta)
774 ifsta->direct_probe_tries++;
775 if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
776 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
777 sdata->dev->name, ifsta->bssid);
778 ifsta->state = IEEE80211_STA_MLME_DISABLED;
779 ieee80211_sta_send_apinfo(sdata, ifsta);
783 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
784 sdata->dev->name, ifsta->bssid,
785 ifsta->direct_probe_tries);
787 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
789 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request);
791 /* Direct probe is sent to broadcast address as some APs
792 * will not answer to direct packet in unassociated state.
794 ieee80211_send_probe_req(sdata, NULL,
795 ifsta->ssid, ifsta->ssid_len);
797 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
801 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
802 struct ieee80211_if_sta *ifsta)
805 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
806 printk(KERN_DEBUG "%s: authentication with AP %pM"
808 sdata->dev->name, ifsta->bssid);
809 ifsta->state = IEEE80211_STA_MLME_DISABLED;
810 ieee80211_sta_send_apinfo(sdata, ifsta);
814 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
815 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
816 sdata->dev->name, ifsta->bssid);
818 ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
820 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
824 * The disassoc 'reason' argument can be either our own reason
825 * if self disconnected or a reason code from the AP.
827 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
828 struct ieee80211_if_sta *ifsta, bool deauth,
829 bool self_disconnected, u16 reason)
831 struct ieee80211_local *local = sdata->local;
832 struct sta_info *sta;
833 u32 changed = 0, config_changed = 0;
837 sta = sta_info_get(local, ifsta->bssid);
844 ifsta->direct_probe_tries = 0;
845 ifsta->auth_tries = 0;
847 ifsta->assoc_scan_tries = 0;
848 ifsta->assoc_tries = 0;
850 netif_tx_stop_all_queues(sdata->dev);
851 netif_carrier_off(sdata->dev);
853 ieee80211_sta_tear_down_BA_sessions(sdata, sta->sta.addr);
855 if (self_disconnected) {
857 ieee80211_send_deauth_disassoc(sdata,
858 IEEE80211_STYPE_DEAUTH, reason);
860 ieee80211_send_deauth_disassoc(sdata,
861 IEEE80211_STYPE_DISASSOC, reason);
864 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
865 changed |= ieee80211_reset_erp_info(sdata);
867 ieee80211_led_assoc(local, 0);
868 changed |= BSS_CHANGED_ASSOC;
869 sdata->vif.bss_conf.assoc = false;
871 ieee80211_sta_send_apinfo(sdata, ifsta);
873 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT)
874 ifsta->state = IEEE80211_STA_MLME_DISABLED;
878 local->hw.conf.ht.enabled = false;
879 local->oper_channel_type = NL80211_CHAN_NO_HT;
880 config_changed |= IEEE80211_CONF_CHANGE_HT;
882 del_timer_sync(&local->dynamic_ps_timer);
883 cancel_work_sync(&local->dynamic_ps_enable_work);
885 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
886 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
887 config_changed |= IEEE80211_CONF_CHANGE_PS;
890 ieee80211_hw_config(local, config_changed);
891 ieee80211_bss_info_change_notify(sdata, changed);
895 sta = sta_info_get(local, ifsta->bssid);
901 sta_info_unlink(&sta);
905 sta_info_destroy(sta);
908 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
910 if (!sdata || !sdata->default_key ||
911 sdata->default_key->conf.alg != ALG_WEP)
916 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
917 struct ieee80211_if_sta *ifsta)
919 struct ieee80211_local *local = sdata->local;
920 struct ieee80211_bss *bss;
925 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
928 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
929 local->hw.conf.channel->center_freq,
930 ifsta->ssid, ifsta->ssid_len);
934 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
935 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
936 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
938 ieee80211_rx_bss_put(local, bss);
940 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
946 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
947 struct ieee80211_if_sta *ifsta)
949 ifsta->assoc_tries++;
950 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
951 printk(KERN_DEBUG "%s: association with AP %pM"
953 sdata->dev->name, ifsta->bssid);
954 ifsta->state = IEEE80211_STA_MLME_DISABLED;
955 ieee80211_sta_send_apinfo(sdata, ifsta);
959 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
960 printk(KERN_DEBUG "%s: associate with AP %pM\n",
961 sdata->dev->name, ifsta->bssid);
962 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
963 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
964 "mixed-cell disabled - abort association\n", sdata->dev->name);
965 ifsta->state = IEEE80211_STA_MLME_DISABLED;
969 ieee80211_send_assoc(sdata, ifsta);
971 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
975 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
976 struct ieee80211_if_sta *ifsta)
978 struct ieee80211_local *local = sdata->local;
979 struct sta_info *sta;
982 /* TODO: start monitoring current AP signal quality and number of
983 * missed beacons. Scan other channels every now and then and search
985 /* TODO: remove expired BSSes */
987 ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
991 sta = sta_info_get(local, ifsta->bssid);
993 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
994 sdata->dev->name, ifsta->bssid);
998 if (time_after(jiffies,
999 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
1000 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
1001 printk(KERN_DEBUG "%s: No ProbeResp from "
1002 "current AP %pM - assume out of "
1004 sdata->dev->name, ifsta->bssid);
1007 ieee80211_send_probe_req(sdata, ifsta->bssid,
1010 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
1012 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1013 if (time_after(jiffies, ifsta->last_probe +
1014 IEEE80211_PROBE_INTERVAL)) {
1015 ifsta->last_probe = jiffies;
1016 ieee80211_send_probe_req(sdata, ifsta->bssid,
1026 ieee80211_set_disassoc(sdata, ifsta, true, true,
1027 WLAN_REASON_PREV_AUTH_NOT_VALID);
1029 mod_timer(&ifsta->timer, jiffies +
1030 IEEE80211_MONITORING_INTERVAL);
1034 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
1035 struct ieee80211_if_sta *ifsta)
1037 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1038 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1039 ieee80211_associate(sdata, ifsta);
1043 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1044 struct ieee80211_if_sta *ifsta,
1045 struct ieee80211_mgmt *mgmt,
1049 struct ieee802_11_elems elems;
1051 pos = mgmt->u.auth.variable;
1052 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1053 if (!elems.challenge)
1055 ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
1056 elems.challenge_len + 2, 1);
1059 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1060 struct ieee80211_if_sta *ifsta,
1061 struct ieee80211_mgmt *mgmt,
1064 u16 auth_alg, auth_transaction, status_code;
1066 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
1067 sdata->vif.type != NL80211_IFTYPE_ADHOC)
1073 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
1074 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1077 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
1078 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1081 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1082 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1083 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1085 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
1087 * IEEE 802.11 standard does not require authentication in IBSS
1088 * networks and most implementations do not seem to use it.
1089 * However, try to reply to authentication attempts if someone
1090 * has actually implemented this.
1092 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
1094 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
1097 if (auth_alg != ifsta->auth_alg ||
1098 auth_transaction != ifsta->auth_transaction)
1101 if (status_code != WLAN_STATUS_SUCCESS) {
1102 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1104 const int num_algs = ARRAY_SIZE(algs);
1106 algs[0] = algs[1] = algs[2] = 0xff;
1107 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1108 algs[0] = WLAN_AUTH_OPEN;
1109 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1110 algs[1] = WLAN_AUTH_SHARED_KEY;
1111 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1112 algs[2] = WLAN_AUTH_LEAP;
1113 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1115 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1119 for (i = 0; i < num_algs; i++) {
1121 if (pos >= num_algs)
1123 if (algs[pos] == ifsta->auth_alg ||
1126 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1127 !ieee80211_sta_wep_configured(sdata))
1129 ifsta->auth_alg = algs[pos];
1136 switch (ifsta->auth_alg) {
1137 case WLAN_AUTH_OPEN:
1138 case WLAN_AUTH_LEAP:
1139 ieee80211_auth_completed(sdata, ifsta);
1141 case WLAN_AUTH_SHARED_KEY:
1142 if (ifsta->auth_transaction == 4)
1143 ieee80211_auth_completed(sdata, ifsta);
1145 ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
1151 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1152 struct ieee80211_if_sta *ifsta,
1153 struct ieee80211_mgmt *mgmt,
1161 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1164 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1166 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
1167 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1168 sdata->dev->name, reason_code);
1170 if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1171 ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
1172 ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1173 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1174 mod_timer(&ifsta->timer, jiffies +
1175 IEEE80211_RETRY_AUTH_INTERVAL);
1178 ieee80211_set_disassoc(sdata, ifsta, true, false, 0);
1179 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1183 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1184 struct ieee80211_if_sta *ifsta,
1185 struct ieee80211_mgmt *mgmt,
1193 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1196 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1198 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1199 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1200 sdata->dev->name, reason_code);
1202 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1203 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
1204 mod_timer(&ifsta->timer, jiffies +
1205 IEEE80211_RETRY_AUTH_INTERVAL);
1208 ieee80211_set_disassoc(sdata, ifsta, false, false, reason_code);
1212 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1213 struct ieee80211_if_sta *ifsta,
1214 struct ieee80211_mgmt *mgmt,
1218 struct ieee80211_local *local = sdata->local;
1219 struct ieee80211_supported_band *sband;
1220 struct sta_info *sta;
1221 u64 rates, basic_rates;
1222 u16 capab_info, status_code, aid;
1223 struct ieee802_11_elems elems;
1224 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1228 bool have_higher_than_11mbit = false, newsta = false;
1229 u16 ap_ht_cap_flags;
1231 /* AssocResp and ReassocResp have identical structure, so process both
1232 * of them in this function. */
1234 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
1240 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1243 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1244 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1245 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1247 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1248 "status=%d aid=%d)\n",
1249 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1250 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1252 if (status_code != WLAN_STATUS_SUCCESS) {
1253 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1254 sdata->dev->name, status_code);
1255 /* if this was a reassociation, ensure we try a "full"
1256 * association next time. This works around some broken APs
1257 * which do not correctly reject reassociation requests. */
1258 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1262 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1263 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1264 "set\n", sdata->dev->name, aid);
1265 aid &= ~(BIT(15) | BIT(14));
1267 pos = mgmt->u.assoc_resp.variable;
1268 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1270 if (!elems.supp_rates) {
1271 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1276 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1278 ifsta->ap_capab = capab_info;
1280 kfree(ifsta->assocresp_ies);
1281 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1282 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1283 if (ifsta->assocresp_ies)
1284 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1288 /* Add STA entry for the AP */
1289 sta = sta_info_get(local, ifsta->bssid);
1291 struct ieee80211_bss *bss;
1295 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1297 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1298 " the AP\n", sdata->dev->name);
1302 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
1303 local->hw.conf.channel->center_freq,
1304 ifsta->ssid, ifsta->ssid_len);
1306 sta->last_signal = bss->signal;
1307 sta->last_qual = bss->qual;
1308 sta->last_noise = bss->noise;
1309 ieee80211_rx_bss_put(local, bss);
1312 /* update new sta with its last rx activity */
1313 sta->last_rx = jiffies;
1317 * FIXME: Do we really need to update the sta_info's information here?
1318 * We already know about the AP (we found it in our list) so it
1319 * should already be filled with the right info, no?
1320 * As is stands, all this is racy because typically we assume
1321 * the information that is filled in here (except flags) doesn't
1322 * change while a STA structure is alive. As such, it should move
1323 * to between the sta_info_alloc() and sta_info_insert() above.
1326 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1327 WLAN_STA_AUTHORIZED);
1331 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1333 for (i = 0; i < elems.supp_rates_len; i++) {
1334 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1335 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1338 have_higher_than_11mbit = true;
1340 for (j = 0; j < sband->n_bitrates; j++) {
1341 if (sband->bitrates[j].bitrate == rate) {
1344 basic_rates |= BIT(j);
1350 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1351 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1352 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1355 have_higher_than_11mbit = true;
1357 for (j = 0; j < sband->n_bitrates; j++) {
1358 if (sband->bitrates[j].bitrate == rate) {
1361 basic_rates |= BIT(j);
1367 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1368 sdata->vif.bss_conf.basic_rates = basic_rates;
1370 /* cf. IEEE 802.11 9.2.12 */
1371 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1372 have_higher_than_11mbit)
1373 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1375 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1377 if (elems.ht_cap_elem)
1378 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1379 elems.ht_cap_elem, &sta->sta.ht_cap);
1381 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1383 rate_control_rate_init(sta);
1385 if (elems.wmm_param)
1386 set_sta_flags(sta, WLAN_STA_WME);
1389 int err = sta_info_insert(sta);
1391 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1392 " the AP (error %d)\n", sdata->dev->name, err);
1400 if (elems.wmm_param)
1401 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1402 elems.wmm_param_len);
1404 if (elems.ht_info_elem && elems.wmm_param &&
1405 (ifsta->flags & IEEE80211_STA_WMM_ENABLED))
1406 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1409 /* set AID and assoc capability,
1410 * ieee80211_set_associated() will tell the driver */
1411 bss_conf->aid = aid;
1412 bss_conf->assoc_capability = capab_info;
1413 ieee80211_set_associated(sdata, ifsta, changed);
1415 ieee80211_associated(sdata, ifsta);
1419 static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
1420 struct ieee80211_if_sta *ifsta,
1421 struct ieee80211_bss *bss)
1423 struct ieee80211_local *local = sdata->local;
1424 int res, rates, i, j;
1425 struct sk_buff *skb;
1426 struct ieee80211_mgmt *mgmt;
1428 struct ieee80211_supported_band *sband;
1429 union iwreq_data wrqu;
1431 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
1433 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1434 "response\n", sdata->dev->name);
1438 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1440 /* Remove possible STA entries from other IBSS networks. */
1441 sta_info_flush_delayed(sdata);
1443 if (local->ops->reset_tsf) {
1444 /* Reset own TSF to allow time synchronization work. */
1445 local->ops->reset_tsf(local_to_hw(local));
1447 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
1448 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
1452 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
1454 sdata->drop_unencrypted = bss->capability &
1455 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
1457 res = ieee80211_set_freq(sdata, bss->freq);
1462 /* Build IBSS probe response */
1464 skb_reserve(skb, local->hw.extra_tx_headroom);
1466 mgmt = (struct ieee80211_mgmt *)
1467 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
1468 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
1469 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1470 IEEE80211_STYPE_PROBE_RESP);
1471 memset(mgmt->da, 0xff, ETH_ALEN);
1472 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1473 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1474 mgmt->u.beacon.beacon_int =
1475 cpu_to_le16(local->hw.conf.beacon_int);
1476 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
1477 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
1479 pos = skb_put(skb, 2 + ifsta->ssid_len);
1480 *pos++ = WLAN_EID_SSID;
1481 *pos++ = ifsta->ssid_len;
1482 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
1484 rates = bss->supp_rates_len;
1487 pos = skb_put(skb, 2 + rates);
1488 *pos++ = WLAN_EID_SUPP_RATES;
1490 memcpy(pos, bss->supp_rates, rates);
1492 if (bss->band == IEEE80211_BAND_2GHZ) {
1493 pos = skb_put(skb, 2 + 1);
1494 *pos++ = WLAN_EID_DS_PARAMS;
1496 *pos++ = ieee80211_frequency_to_channel(bss->freq);
1499 pos = skb_put(skb, 2 + 2);
1500 *pos++ = WLAN_EID_IBSS_PARAMS;
1502 /* FIX: set ATIM window based on scan results */
1506 if (bss->supp_rates_len > 8) {
1507 rates = bss->supp_rates_len - 8;
1508 pos = skb_put(skb, 2 + rates);
1509 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1511 memcpy(pos, &bss->supp_rates[8], rates);
1514 ifsta->probe_resp = skb;
1516 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
1520 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1521 for (i = 0; i < bss->supp_rates_len; i++) {
1522 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
1523 for (j = 0; j < sband->n_bitrates; j++)
1524 if (sband->bitrates[j].bitrate == bitrate)
1527 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
1529 ieee80211_sta_def_wmm_params(sdata, bss);
1531 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
1532 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1534 ieee80211_led_assoc(local, true);
1536 memset(&wrqu, 0, sizeof(wrqu));
1537 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
1538 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
1543 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1544 struct ieee80211_mgmt *mgmt,
1546 struct ieee80211_rx_status *rx_status,
1547 struct ieee802_11_elems *elems,
1550 struct ieee80211_local *local = sdata->local;
1552 struct ieee80211_bss *bss;
1553 struct sta_info *sta;
1554 struct ieee80211_channel *channel;
1555 u64 beacon_timestamp, rx_timestamp;
1557 enum ieee80211_band band = rx_status->band;
1559 if (elems->ds_params && elems->ds_params_len == 1)
1560 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1562 freq = rx_status->freq;
1564 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1566 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1569 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && elems->supp_rates &&
1570 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1571 supp_rates = ieee80211_sta_get_rates(local, elems, band);
1575 sta = sta_info_get(local, mgmt->sa);
1579 prev_rates = sta->sta.supp_rates[band];
1580 /* make sure mandatory rates are always added */
1581 sta->sta.supp_rates[band] = supp_rates |
1582 ieee80211_mandatory_rates(local, band);
1584 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1585 if (sta->sta.supp_rates[band] != prev_rates)
1586 printk(KERN_DEBUG "%s: updated supp_rates set "
1587 "for %pM based on beacon info (0x%llx | "
1588 "0x%llx -> 0x%llx)\n",
1591 (unsigned long long) prev_rates,
1592 (unsigned long long) supp_rates,
1593 (unsigned long long) sta->sta.supp_rates[band]);
1596 ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates);
1602 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1607 /* was just updated in ieee80211_bss_info_update */
1608 beacon_timestamp = bss->timestamp;
1611 * In STA mode, the remaining parameters should not be overridden
1612 * by beacons because they're not necessarily accurate there.
1614 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
1615 bss->last_probe_resp && beacon) {
1616 ieee80211_rx_bss_put(local, bss);
1620 /* check if we need to merge IBSS */
1621 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && beacon &&
1622 bss->capability & WLAN_CAPABILITY_IBSS &&
1623 bss->freq == local->oper_channel->center_freq &&
1624 elems->ssid_len == sdata->u.sta.ssid_len &&
1625 memcmp(elems->ssid, sdata->u.sta.ssid,
1626 sdata->u.sta.ssid_len) == 0) {
1627 if (rx_status->flag & RX_FLAG_TSFT) {
1628 /* in order for correct IBSS merging we need mactime
1630 * since mactime is defined as the time the first data
1631 * symbol of the frame hits the PHY, and the timestamp
1632 * of the beacon is defined as "the time that the data
1633 * symbol containing the first bit of the timestamp is
1634 * transmitted to the PHY plus the transmitting STA’s
1635 * delays through its local PHY from the MAC-PHY
1636 * interface to its interface with the WM"
1637 * (802.11 11.1.2) - equals the time this bit arrives at
1638 * the receiver - we have to take into account the
1639 * offset between the two.
1640 * e.g: at 1 MBit that means mactime is 192 usec earlier
1641 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
1644 if (rx_status->flag & RX_FLAG_HT) {
1645 rate = 65; /* TODO: HT rates */
1647 rate = local->hw.wiphy->bands[band]->
1648 bitrates[rx_status->rate_idx].bitrate;
1650 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
1651 } else if (local && local->ops && local->ops->get_tsf)
1652 /* second best option: get current TSF */
1653 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
1655 /* can't merge without knowing the TSF */
1656 rx_timestamp = -1LLU;
1657 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1658 printk(KERN_DEBUG "RX beacon SA=%pM BSSID="
1659 "%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
1660 mgmt->sa, mgmt->bssid,
1661 (unsigned long long)rx_timestamp,
1662 (unsigned long long)beacon_timestamp,
1663 (unsigned long long)(rx_timestamp - beacon_timestamp),
1665 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1666 if (beacon_timestamp > rx_timestamp) {
1667 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1668 printk(KERN_DEBUG "%s: beacon TSF higher than "
1669 "local TSF - IBSS merge with BSSID %pM\n",
1670 sdata->dev->name, mgmt->bssid);
1672 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
1673 ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates);
1677 ieee80211_rx_bss_put(local, bss);
1681 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1682 struct ieee80211_mgmt *mgmt,
1684 struct ieee80211_rx_status *rx_status)
1687 struct ieee802_11_elems elems;
1688 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1690 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1691 return; /* ignore ProbeResp to foreign address */
1693 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1697 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1700 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1702 /* direct probe may be part of the association flow */
1703 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1705 printk(KERN_DEBUG "%s direct probe responded\n",
1707 ieee80211_authenticate(sdata, ifsta);
1712 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1713 struct ieee80211_mgmt *mgmt,
1715 struct ieee80211_rx_status *rx_status)
1717 struct ieee80211_if_sta *ifsta;
1719 struct ieee802_11_elems elems;
1720 struct ieee80211_local *local = sdata->local;
1725 /* Process beacon from the current BSS */
1726 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1730 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1732 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
1734 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1736 ifsta = &sdata->u.sta;
1738 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
1739 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1742 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1743 elems.wmm_param_len);
1746 if (elems.erp_info && elems.erp_info_len >= 1) {
1748 erp_value = elems.erp_info[0];
1752 changed |= ieee80211_handle_bss_capability(sdata,
1753 le16_to_cpu(mgmt->u.beacon.capab_info),
1754 erp_valid, erp_value);
1757 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param) {
1758 struct sta_info *sta;
1759 struct ieee80211_supported_band *sband;
1760 u16 ap_ht_cap_flags;
1764 sta = sta_info_get(local, ifsta->bssid);
1770 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1772 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1773 elems.ht_cap_elem, &sta->sta.ht_cap);
1775 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1779 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1783 if (elems.country_elem) {
1784 /* Note we are only reviewing this on beacons
1785 * for the BSSID we are associated to */
1786 regulatory_hint_11d(local->hw.wiphy,
1787 elems.country_elem, elems.country_elem_len);
1790 ieee80211_bss_info_change_notify(sdata, changed);
1794 static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
1795 struct ieee80211_if_sta *ifsta,
1796 struct ieee80211_mgmt *mgmt,
1798 struct ieee80211_rx_status *rx_status)
1800 struct ieee80211_local *local = sdata->local;
1802 struct sk_buff *skb;
1803 struct ieee80211_mgmt *resp;
1806 if (sdata->vif.type != NL80211_IFTYPE_ADHOC ||
1807 ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
1808 len < 24 + 2 || !ifsta->probe_resp)
1811 if (local->ops->tx_last_beacon)
1812 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1816 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1817 printk(KERN_DEBUG "%s: RX ProbeReq SA=%pM DA=%pM BSSID=%pM"
1818 " (tx_last_beacon=%d)\n",
1819 sdata->dev->name, mgmt->sa, mgmt->da,
1820 mgmt->bssid, tx_last_beacon);
1821 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1823 if (!tx_last_beacon)
1826 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1827 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1830 end = ((u8 *) mgmt) + len;
1831 pos = mgmt->u.probe_req.variable;
1832 if (pos[0] != WLAN_EID_SSID ||
1833 pos + 2 + pos[1] > end) {
1834 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1835 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
1837 sdata->dev->name, mgmt->sa);
1842 (pos[1] != ifsta->ssid_len ||
1843 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1844 /* Ignore ProbeReq for foreign SSID */
1848 /* Reply with ProbeResp */
1849 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
1853 resp = (struct ieee80211_mgmt *) skb->data;
1854 memcpy(resp->da, mgmt->sa, ETH_ALEN);
1855 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1856 printk(KERN_DEBUG "%s: Sending ProbeResp to %pM\n",
1857 sdata->dev->name, resp->da);
1858 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1859 ieee80211_tx_skb(sdata, skb, 0);
1862 void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
1863 struct ieee80211_rx_status *rx_status)
1865 struct ieee80211_local *local = sdata->local;
1866 struct ieee80211_if_sta *ifsta;
1867 struct ieee80211_mgmt *mgmt;
1873 ifsta = &sdata->u.sta;
1875 mgmt = (struct ieee80211_mgmt *) skb->data;
1876 fc = le16_to_cpu(mgmt->frame_control);
1878 switch (fc & IEEE80211_FCTL_STYPE) {
1879 case IEEE80211_STYPE_PROBE_REQ:
1880 case IEEE80211_STYPE_PROBE_RESP:
1881 case IEEE80211_STYPE_BEACON:
1882 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1883 case IEEE80211_STYPE_AUTH:
1884 case IEEE80211_STYPE_ASSOC_RESP:
1885 case IEEE80211_STYPE_REASSOC_RESP:
1886 case IEEE80211_STYPE_DEAUTH:
1887 case IEEE80211_STYPE_DISASSOC:
1888 skb_queue_tail(&ifsta->skb_queue, skb);
1889 queue_work(local->hw.workqueue, &ifsta->work);
1897 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1898 struct sk_buff *skb)
1900 struct ieee80211_rx_status *rx_status;
1901 struct ieee80211_if_sta *ifsta;
1902 struct ieee80211_mgmt *mgmt;
1905 ifsta = &sdata->u.sta;
1907 rx_status = (struct ieee80211_rx_status *) skb->cb;
1908 mgmt = (struct ieee80211_mgmt *) skb->data;
1909 fc = le16_to_cpu(mgmt->frame_control);
1911 switch (fc & IEEE80211_FCTL_STYPE) {
1912 case IEEE80211_STYPE_PROBE_REQ:
1913 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len,
1916 case IEEE80211_STYPE_PROBE_RESP:
1917 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
1919 case IEEE80211_STYPE_BEACON:
1920 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
1922 case IEEE80211_STYPE_AUTH:
1923 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
1925 case IEEE80211_STYPE_ASSOC_RESP:
1926 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
1928 case IEEE80211_STYPE_REASSOC_RESP:
1929 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
1931 case IEEE80211_STYPE_DEAUTH:
1932 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
1934 case IEEE80211_STYPE_DISASSOC:
1935 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
1943 static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
1945 struct ieee80211_local *local = sdata->local;
1947 struct sta_info *sta;
1951 list_for_each_entry_rcu(sta, &local->sta_list, list) {
1952 if (sta->sdata == sdata &&
1953 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
1966 static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
1967 struct ieee80211_if_sta *ifsta)
1969 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1971 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
1972 if (ieee80211_sta_active_ibss(sdata))
1975 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
1976 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
1977 ieee80211_request_scan(sdata, ifsta->ssid, ifsta->ssid_len);
1981 static void ieee80211_sta_timer(unsigned long data)
1983 struct ieee80211_sub_if_data *sdata =
1984 (struct ieee80211_sub_if_data *) data;
1985 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1986 struct ieee80211_local *local = sdata->local;
1988 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1989 queue_work(local->hw.workqueue, &ifsta->work);
1992 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
1993 struct ieee80211_if_sta *ifsta)
1995 struct ieee80211_local *local = sdata->local;
1997 if (local->ops->reset_tsf) {
1998 /* Reset own TSF to allow time synchronization work. */
1999 local->ops->reset_tsf(local_to_hw(local));
2002 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2005 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2006 ifsta->auth_alg = WLAN_AUTH_OPEN;
2007 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2008 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2009 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2010 ifsta->auth_alg = WLAN_AUTH_LEAP;
2012 ifsta->auth_alg = WLAN_AUTH_OPEN;
2013 ifsta->auth_transaction = -1;
2014 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
2015 ifsta->assoc_scan_tries = 0;
2016 ifsta->direct_probe_tries = 0;
2017 ifsta->auth_tries = 0;
2018 ifsta->assoc_tries = 0;
2019 netif_tx_stop_all_queues(sdata->dev);
2020 netif_carrier_off(sdata->dev);
2024 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2025 const char *ssid, int ssid_len)
2027 int tmp, hidden_ssid;
2029 if (ssid_len == ifsta->ssid_len &&
2030 !memcmp(ifsta->ssid, ssid, ssid_len))
2033 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2039 if (ssid[tmp] != '\0') {
2045 if (hidden_ssid && (ifsta->ssid_len == ssid_len || ssid_len == 0))
2048 if (ssid_len == 1 && ssid[0] == ' ')
2054 static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
2055 struct ieee80211_if_sta *ifsta)
2057 struct ieee80211_local *local = sdata->local;
2058 struct ieee80211_bss *bss;
2059 struct ieee80211_supported_band *sband;
2060 u8 bssid[ETH_ALEN], *pos;
2065 /* Easier testing, use fixed BSSID. */
2066 memset(bssid, 0xfe, ETH_ALEN);
2068 /* Generate random, not broadcast, locally administered BSSID. Mix in
2069 * own MAC address to make sure that devices that do not have proper
2070 * random number generator get different BSSID. */
2071 get_random_bytes(bssid, ETH_ALEN);
2072 for (i = 0; i < ETH_ALEN; i++)
2073 bssid[i] ^= sdata->dev->dev_addr[i];
2078 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %pM\n",
2079 sdata->dev->name, bssid);
2081 bss = ieee80211_rx_bss_add(local, bssid,
2082 local->hw.conf.channel->center_freq,
2083 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
2087 bss->band = local->hw.conf.channel->band;
2088 sband = local->hw.wiphy->bands[bss->band];
2090 if (local->hw.conf.beacon_int == 0)
2091 local->hw.conf.beacon_int = 100;
2092 bss->beacon_int = local->hw.conf.beacon_int;
2093 bss->last_update = jiffies;
2094 bss->capability = WLAN_CAPABILITY_IBSS;
2096 if (sdata->default_key)
2097 bss->capability |= WLAN_CAPABILITY_PRIVACY;
2099 sdata->drop_unencrypted = 0;
2101 bss->supp_rates_len = sband->n_bitrates;
2102 pos = bss->supp_rates;
2103 for (i = 0; i < sband->n_bitrates; i++) {
2104 int rate = sband->bitrates[i].bitrate;
2105 *pos++ = (u8) (rate / 5);
2108 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
2109 ieee80211_rx_bss_put(local, bss);
2114 static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
2115 struct ieee80211_if_sta *ifsta)
2117 struct ieee80211_local *local = sdata->local;
2118 struct ieee80211_bss *bss;
2123 if (ifsta->ssid_len == 0)
2126 active_ibss = ieee80211_sta_active_ibss(sdata);
2127 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2128 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2129 sdata->dev->name, active_ibss);
2130 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2131 spin_lock_bh(&local->bss_lock);
2132 list_for_each_entry(bss, &local->bss_list, list) {
2133 if (ifsta->ssid_len != bss->ssid_len ||
2134 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2135 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2137 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2138 printk(KERN_DEBUG " bssid=%pM found\n", bss->bssid);
2139 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2140 memcpy(bssid, bss->bssid, ETH_ALEN);
2142 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2145 spin_unlock_bh(&local->bss_lock);
2147 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2149 printk(KERN_DEBUG " sta_find_ibss: selected %pM current "
2150 "%pM\n", bssid, ifsta->bssid);
2151 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2153 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2157 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2158 search_freq = bss->freq;
2160 search_freq = local->hw.conf.channel->center_freq;
2162 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
2163 ifsta->ssid, ifsta->ssid_len);
2167 printk(KERN_DEBUG "%s: Selected IBSS BSSID %pM"
2168 " based on configured SSID\n",
2169 sdata->dev->name, bssid);
2170 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
2171 ieee80211_rx_bss_put(local, bss);
2176 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2177 printk(KERN_DEBUG " did not try to join ibss\n");
2178 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2180 /* Selected IBSS not found in current scan results - try to scan */
2181 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
2182 !ieee80211_sta_active_ibss(sdata)) {
2183 mod_timer(&ifsta->timer, jiffies +
2184 IEEE80211_IBSS_MERGE_INTERVAL);
2185 } else if (time_after(jiffies, local->last_scan_completed +
2186 IEEE80211_SCAN_INTERVAL)) {
2187 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
2188 "join\n", sdata->dev->name);
2189 return ieee80211_request_scan(sdata, ifsta->ssid,
2191 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
2192 int interval = IEEE80211_SCAN_INTERVAL;
2194 if (time_after(jiffies, ifsta->ibss_join_req +
2195 IEEE80211_IBSS_JOIN_TIMEOUT)) {
2196 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
2197 (!(local->oper_channel->flags &
2198 IEEE80211_CHAN_NO_IBSS)))
2199 return ieee80211_sta_create_ibss(sdata, ifsta);
2200 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
2201 printk(KERN_DEBUG "%s: IBSS not allowed on"
2202 " %d MHz\n", sdata->dev->name,
2203 local->hw.conf.channel->center_freq);
2206 /* No IBSS found - decrease scan interval and continue
2208 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2211 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2212 mod_timer(&ifsta->timer, jiffies + interval);
2220 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
2221 struct ieee80211_if_sta *ifsta)
2223 struct ieee80211_local *local = sdata->local;
2224 struct ieee80211_bss *bss, *selected = NULL;
2225 int top_rssi = 0, freq;
2227 spin_lock_bh(&local->bss_lock);
2228 freq = local->oper_channel->center_freq;
2229 list_for_each_entry(bss, &local->bss_list, list) {
2230 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2233 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2234 IEEE80211_STA_AUTO_BSSID_SEL |
2235 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
2236 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2237 !!sdata->default_key))
2240 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2244 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2245 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2248 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2249 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2252 if (!selected || top_rssi < bss->signal) {
2254 top_rssi = bss->signal;
2258 atomic_inc(&selected->users);
2259 spin_unlock_bh(&local->bss_lock);
2262 ieee80211_set_freq(sdata, selected->freq);
2263 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2264 ieee80211_sta_set_ssid(sdata, selected->ssid,
2265 selected->ssid_len);
2266 ieee80211_sta_set_bssid(sdata, selected->bssid);
2267 ieee80211_sta_def_wmm_params(sdata, selected);
2269 /* Send out direct probe if no probe resp was received or
2270 * the one we have is outdated
2272 if (!selected->last_probe_resp ||
2273 time_after(jiffies, selected->last_probe_resp
2274 + IEEE80211_SCAN_RESULT_EXPIRE))
2275 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2277 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2279 ieee80211_rx_bss_put(local, selected);
2280 ieee80211_sta_reset_auth(sdata, ifsta);
2283 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2284 ifsta->assoc_scan_tries++;
2285 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
2286 ieee80211_start_scan(sdata, NULL, 0);
2288 ieee80211_start_scan(sdata, ifsta->ssid,
2290 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2291 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2293 ifsta->state = IEEE80211_STA_MLME_DISABLED;
2299 static void ieee80211_sta_work(struct work_struct *work)
2301 struct ieee80211_sub_if_data *sdata =
2302 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2303 struct ieee80211_local *local = sdata->local;
2304 struct ieee80211_if_sta *ifsta;
2305 struct sk_buff *skb;
2307 if (!netif_running(sdata->dev))
2310 if (local->sw_scanning || local->hw_scanning)
2313 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION &&
2314 sdata->vif.type != NL80211_IFTYPE_ADHOC))
2316 ifsta = &sdata->u.sta;
2318 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2319 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2321 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2322 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2323 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
2324 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
2325 ieee80211_start_scan(sdata, ifsta->scan_ssid,
2326 ifsta->scan_ssid_len);
2330 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2331 if (ieee80211_sta_config_auth(sdata, ifsta))
2333 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2334 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2337 switch (ifsta->state) {
2338 case IEEE80211_STA_MLME_DISABLED:
2340 case IEEE80211_STA_MLME_DIRECT_PROBE:
2341 ieee80211_direct_probe(sdata, ifsta);
2343 case IEEE80211_STA_MLME_AUTHENTICATE:
2344 ieee80211_authenticate(sdata, ifsta);
2346 case IEEE80211_STA_MLME_ASSOCIATE:
2347 ieee80211_associate(sdata, ifsta);
2349 case IEEE80211_STA_MLME_ASSOCIATED:
2350 ieee80211_associated(sdata, ifsta);
2352 case IEEE80211_STA_MLME_IBSS_SEARCH:
2353 ieee80211_sta_find_ibss(sdata, ifsta);
2355 case IEEE80211_STA_MLME_IBSS_JOINED:
2356 ieee80211_sta_merge_ibss(sdata, ifsta);
2363 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
2364 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2365 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2367 ieee80211_set_disassoc(sdata, ifsta, false, true,
2368 WLAN_REASON_UNSPECIFIED);
2372 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2374 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2375 queue_work(sdata->local->hw.workqueue,
2376 &sdata->u.sta.work);
2379 /* interface setup */
2380 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2382 struct ieee80211_if_sta *ifsta;
2384 ifsta = &sdata->u.sta;
2385 INIT_WORK(&ifsta->work, ieee80211_sta_work);
2386 setup_timer(&ifsta->timer, ieee80211_sta_timer,
2387 (unsigned long) sdata);
2388 skb_queue_head_init(&ifsta->skb_queue);
2390 ifsta->capab = WLAN_CAPABILITY_ESS;
2391 ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2392 IEEE80211_AUTH_ALG_SHARED_KEY;
2393 ifsta->flags |= IEEE80211_STA_CREATE_IBSS |
2394 IEEE80211_STA_AUTO_BSSID_SEL |
2395 IEEE80211_STA_AUTO_CHANNEL_SEL;
2396 if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4)
2397 ifsta->flags |= IEEE80211_STA_WMM_ENABLED;
2401 * Add a new IBSS station, will also be called by the RX code when,
2402 * in IBSS mode, receiving a frame from a yet-unknown station, hence
2403 * must be callable in atomic context.
2405 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
2406 u8 *bssid,u8 *addr, u64 supp_rates)
2408 struct ieee80211_local *local = sdata->local;
2409 struct sta_info *sta;
2410 int band = local->hw.conf.channel->band;
2412 /* TODO: Could consider removing the least recently used entry and
2413 * allow new one to be added. */
2414 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
2415 if (net_ratelimit()) {
2416 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
2417 "entry %pM\n", sdata->dev->name, addr);
2422 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
2425 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2426 printk(KERN_DEBUG "%s: Adding new IBSS station %pM (dev=%s)\n",
2427 wiphy_name(local->hw.wiphy), addr, sdata->dev->name);
2430 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
2434 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
2436 /* make sure mandatory rates are always added */
2437 sta->sta.supp_rates[band] = supp_rates |
2438 ieee80211_mandatory_rates(local, band);
2440 rate_control_rate_init(sta);
2442 if (sta_info_insert(sta))
2448 /* configuration hooks */
2449 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
2450 struct ieee80211_if_sta *ifsta)
2452 struct ieee80211_local *local = sdata->local;
2454 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2457 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2458 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2459 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2460 IEEE80211_STA_AUTO_SSID_SEL))) {
2462 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED)
2463 ieee80211_set_disassoc(sdata, ifsta, true, true,
2464 WLAN_REASON_DEAUTH_LEAVING);
2466 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2467 queue_work(local->hw.workqueue, &ifsta->work);
2471 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2473 struct ieee80211_if_sta *ifsta;
2475 if (len > IEEE80211_MAX_SSID_LEN)
2478 ifsta = &sdata->u.sta;
2480 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
2481 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
2482 memcpy(ifsta->ssid, ssid, len);
2483 ifsta->ssid_len = len;
2484 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2488 ifsta->flags |= IEEE80211_STA_SSID_SET;
2490 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
2492 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
2493 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
2494 ifsta->ibss_join_req = jiffies;
2495 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2496 return ieee80211_sta_find_ibss(sdata, ifsta);
2502 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2504 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2505 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2506 *len = ifsta->ssid_len;
2510 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2512 struct ieee80211_if_sta *ifsta;
2515 ifsta = &sdata->u.sta;
2517 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2518 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2521 * Hack! See also ieee80211_sta_set_ssid.
2523 if (netif_running(sdata->dev))
2524 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
2526 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2527 "the low-level driver\n", sdata->dev->name);
2532 if (is_valid_ether_addr(bssid))
2533 ifsta->flags |= IEEE80211_STA_BSSID_SET;
2535 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
2540 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
2542 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2544 kfree(ifsta->extra_ie);
2546 ifsta->extra_ie = NULL;
2547 ifsta->extra_ie_len = 0;
2550 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
2551 if (!ifsta->extra_ie) {
2552 ifsta->extra_ie_len = 0;
2555 memcpy(ifsta->extra_ie, ie, len);
2556 ifsta->extra_ie_len = len;
2560 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2562 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2564 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2565 sdata->dev->name, reason);
2567 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
2568 sdata->vif.type != NL80211_IFTYPE_ADHOC)
2571 ieee80211_set_disassoc(sdata, ifsta, true, true, reason);
2575 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2577 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2579 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2580 sdata->dev->name, reason);
2582 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2585 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
2588 ieee80211_set_disassoc(sdata, ifsta, false, true, reason);
2592 /* scan finished notification */
2593 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2595 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2596 struct ieee80211_if_sta *ifsta;
2598 if (sdata && sdata->vif.type == NL80211_IFTYPE_ADHOC) {
2599 ifsta = &sdata->u.sta;
2600 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
2601 (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) &&
2602 !ieee80211_sta_active_ibss(sdata)))
2603 ieee80211_sta_find_ibss(sdata, ifsta);
2606 /* Restart STA timers */
2608 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2609 ieee80211_restart_sta_timer(sdata);
2613 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
2615 struct ieee80211_local *local =
2616 container_of(work, struct ieee80211_local,
2617 dynamic_ps_disable_work);
2619 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2620 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2621 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2624 ieee80211_wake_queues_by_reason(&local->hw,
2625 IEEE80211_QUEUE_STOP_REASON_PS);
2628 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
2630 struct ieee80211_local *local =
2631 container_of(work, struct ieee80211_local,
2632 dynamic_ps_enable_work);
2634 if (local->hw.conf.flags & IEEE80211_CONF_PS)
2637 local->hw.conf.flags |= IEEE80211_CONF_PS;
2639 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2642 void ieee80211_dynamic_ps_timer(unsigned long data)
2644 struct ieee80211_local *local = (void *) data;
2646 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);