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 bool check_tim(struct ieee802_11_elems *elems, u16 aid, bool *is_mc)
581 u8 index, indexn1, indexn2;
582 struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *) elems->tim;
586 mask = 1 << (aid & 7);
588 if (tim->bitmap_ctrl & 0x01)
591 indexn1 = tim->bitmap_ctrl & 0xfe;
592 indexn2 = elems->tim_len + indexn1 - 4;
594 if (index < indexn1 || index > indexn2)
599 return !!(tim->virtual_map[index] & mask);
602 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
603 u16 capab, bool erp_valid, u8 erp)
605 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
606 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
607 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
611 bool use_short_preamble;
615 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
616 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
618 use_protection = false;
619 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
622 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
624 if (use_protection != bss_conf->use_cts_prot) {
625 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
626 if (net_ratelimit()) {
627 printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
629 use_protection ? "enabled" : "disabled",
633 bss_conf->use_cts_prot = use_protection;
634 changed |= BSS_CHANGED_ERP_CTS_PROT;
637 if (use_short_preamble != bss_conf->use_short_preamble) {
638 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
639 if (net_ratelimit()) {
640 printk(KERN_DEBUG "%s: switched to %s barker preamble"
643 use_short_preamble ? "short" : "long",
647 bss_conf->use_short_preamble = use_short_preamble;
648 changed |= BSS_CHANGED_ERP_PREAMBLE;
651 if (use_short_slot != bss_conf->use_short_slot) {
652 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
653 if (net_ratelimit()) {
654 printk(KERN_DEBUG "%s: switched to %s slot time"
657 use_short_slot ? "short" : "long",
661 bss_conf->use_short_slot = use_short_slot;
662 changed |= BSS_CHANGED_ERP_SLOT;
668 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata,
669 struct ieee80211_if_sta *ifsta)
671 union iwreq_data wrqu;
672 memset(&wrqu, 0, sizeof(wrqu));
673 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
674 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
675 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
676 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
679 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata,
680 struct ieee80211_if_sta *ifsta)
685 union iwreq_data wrqu;
687 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
690 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
691 ifsta->assocresp_ies_len), GFP_KERNEL);
695 len = sprintf(buf, "ASSOCINFO(");
696 if (ifsta->assocreq_ies) {
697 len += sprintf(buf + len, "ReqIEs=");
698 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
699 len += sprintf(buf + len, "%02x",
700 ifsta->assocreq_ies[i]);
703 if (ifsta->assocresp_ies) {
704 if (ifsta->assocreq_ies)
705 len += sprintf(buf + len, " ");
706 len += sprintf(buf + len, "RespIEs=");
707 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
708 len += sprintf(buf + len, "%02x",
709 ifsta->assocresp_ies[i]);
712 len += sprintf(buf + len, ")");
714 if (len > IW_CUSTOM_MAX) {
715 len = sprintf(buf, "ASSOCRESPIE=");
716 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
717 len += sprintf(buf + len, "%02x",
718 ifsta->assocresp_ies[i]);
722 if (len <= IW_CUSTOM_MAX) {
723 memset(&wrqu, 0, sizeof(wrqu));
724 wrqu.data.length = len;
725 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
732 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
733 struct ieee80211_if_sta *ifsta,
734 u32 bss_info_changed)
736 struct ieee80211_local *local = sdata->local;
737 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
739 struct ieee80211_bss *bss;
741 bss_info_changed |= BSS_CHANGED_ASSOC;
742 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
744 if (sdata->vif.type != NL80211_IFTYPE_STATION)
747 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
748 conf->channel->center_freq,
749 ifsta->ssid, ifsta->ssid_len);
751 /* set timing information */
752 sdata->vif.bss_conf.beacon_int = bss->beacon_int;
753 sdata->vif.bss_conf.timestamp = bss->timestamp;
754 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
756 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
757 bss->capability, bss->has_erp_value, bss->erp_value);
759 ieee80211_rx_bss_put(local, bss);
762 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
763 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
764 ieee80211_sta_send_associnfo(sdata, ifsta);
766 ifsta->last_probe = jiffies;
767 ieee80211_led_assoc(local, 1);
769 sdata->vif.bss_conf.assoc = 1;
771 * For now just always ask the driver to update the basic rateset
772 * when we have associated, we aren't checking whether it actually
775 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
776 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
778 if (local->powersave &&
779 !(local->hw.flags & IEEE80211_HW_NO_STACK_DYNAMIC_PS)) {
780 if (local->dynamic_ps_timeout > 0)
781 mod_timer(&local->dynamic_ps_timer, jiffies +
782 msecs_to_jiffies(local->dynamic_ps_timeout));
784 ieee80211_send_nullfunc(local, sdata, 1);
785 conf->flags |= IEEE80211_CONF_PS;
786 ieee80211_hw_config(local,
787 IEEE80211_CONF_CHANGE_PS);
791 netif_tx_start_all_queues(sdata->dev);
792 netif_carrier_on(sdata->dev);
794 ieee80211_sta_send_apinfo(sdata, ifsta);
797 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
798 struct ieee80211_if_sta *ifsta)
800 ifsta->direct_probe_tries++;
801 if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
802 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
803 sdata->dev->name, ifsta->bssid);
804 ifsta->state = IEEE80211_STA_MLME_DISABLED;
805 ieee80211_sta_send_apinfo(sdata, ifsta);
809 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
810 sdata->dev->name, ifsta->bssid,
811 ifsta->direct_probe_tries);
813 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
815 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request);
817 /* Direct probe is sent to broadcast address as some APs
818 * will not answer to direct packet in unassociated state.
820 ieee80211_send_probe_req(sdata, NULL,
821 ifsta->ssid, ifsta->ssid_len);
823 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
827 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
828 struct ieee80211_if_sta *ifsta)
831 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
832 printk(KERN_DEBUG "%s: authentication with AP %pM"
834 sdata->dev->name, ifsta->bssid);
835 ifsta->state = IEEE80211_STA_MLME_DISABLED;
836 ieee80211_sta_send_apinfo(sdata, ifsta);
840 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
841 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
842 sdata->dev->name, ifsta->bssid);
844 ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
846 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
850 * The disassoc 'reason' argument can be either our own reason
851 * if self disconnected or a reason code from the AP.
853 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
854 struct ieee80211_if_sta *ifsta, bool deauth,
855 bool self_disconnected, u16 reason)
857 struct ieee80211_local *local = sdata->local;
858 struct sta_info *sta;
859 u32 changed = 0, config_changed = 0;
863 sta = sta_info_get(local, ifsta->bssid);
870 ifsta->direct_probe_tries = 0;
871 ifsta->auth_tries = 0;
873 ifsta->assoc_scan_tries = 0;
874 ifsta->assoc_tries = 0;
876 netif_tx_stop_all_queues(sdata->dev);
877 netif_carrier_off(sdata->dev);
879 ieee80211_sta_tear_down_BA_sessions(sdata, sta->sta.addr);
881 if (self_disconnected) {
883 ieee80211_send_deauth_disassoc(sdata,
884 IEEE80211_STYPE_DEAUTH, reason);
886 ieee80211_send_deauth_disassoc(sdata,
887 IEEE80211_STYPE_DISASSOC, reason);
890 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
891 changed |= ieee80211_reset_erp_info(sdata);
893 ieee80211_led_assoc(local, 0);
894 changed |= BSS_CHANGED_ASSOC;
895 sdata->vif.bss_conf.assoc = false;
897 ieee80211_sta_send_apinfo(sdata, ifsta);
899 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT)
900 ifsta->state = IEEE80211_STA_MLME_DISABLED;
904 local->oper_channel_type = NL80211_CHAN_NO_HT;
905 config_changed |= IEEE80211_CONF_CHANGE_HT;
907 del_timer_sync(&local->dynamic_ps_timer);
908 cancel_work_sync(&local->dynamic_ps_enable_work);
910 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
911 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
912 config_changed |= IEEE80211_CONF_CHANGE_PS;
915 ieee80211_hw_config(local, config_changed);
916 ieee80211_bss_info_change_notify(sdata, changed);
920 sta = sta_info_get(local, ifsta->bssid);
926 sta_info_unlink(&sta);
930 sta_info_destroy(sta);
933 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
935 if (!sdata || !sdata->default_key ||
936 sdata->default_key->conf.alg != ALG_WEP)
941 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
942 struct ieee80211_if_sta *ifsta)
944 struct ieee80211_local *local = sdata->local;
945 struct ieee80211_bss *bss;
950 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
953 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
954 local->hw.conf.channel->center_freq,
955 ifsta->ssid, ifsta->ssid_len);
959 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
960 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
961 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
963 ieee80211_rx_bss_put(local, bss);
965 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
971 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
972 struct ieee80211_if_sta *ifsta)
974 ifsta->assoc_tries++;
975 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
976 printk(KERN_DEBUG "%s: association with AP %pM"
978 sdata->dev->name, ifsta->bssid);
979 ifsta->state = IEEE80211_STA_MLME_DISABLED;
980 ieee80211_sta_send_apinfo(sdata, ifsta);
984 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
985 printk(KERN_DEBUG "%s: associate with AP %pM\n",
986 sdata->dev->name, ifsta->bssid);
987 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
988 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
989 "mixed-cell disabled - abort association\n", sdata->dev->name);
990 ifsta->state = IEEE80211_STA_MLME_DISABLED;
994 ieee80211_send_assoc(sdata, ifsta);
996 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1000 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
1001 struct ieee80211_if_sta *ifsta)
1003 struct ieee80211_local *local = sdata->local;
1004 struct sta_info *sta;
1007 /* TODO: start monitoring current AP signal quality and number of
1008 * missed beacons. Scan other channels every now and then and search
1009 * for better APs. */
1010 /* TODO: remove expired BSSes */
1012 ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
1016 sta = sta_info_get(local, ifsta->bssid);
1018 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
1019 sdata->dev->name, ifsta->bssid);
1023 if (time_after(jiffies,
1024 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
1025 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
1026 printk(KERN_DEBUG "%s: No ProbeResp from "
1027 "current AP %pM - assume out of "
1029 sdata->dev->name, ifsta->bssid);
1032 ieee80211_send_probe_req(sdata, ifsta->bssid,
1035 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
1037 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1038 if (time_after(jiffies, ifsta->last_probe +
1039 IEEE80211_PROBE_INTERVAL)) {
1040 ifsta->last_probe = jiffies;
1041 ieee80211_send_probe_req(sdata, ifsta->bssid,
1051 ieee80211_set_disassoc(sdata, ifsta, true, true,
1052 WLAN_REASON_PREV_AUTH_NOT_VALID);
1054 mod_timer(&ifsta->timer, jiffies +
1055 IEEE80211_MONITORING_INTERVAL);
1059 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
1060 struct ieee80211_if_sta *ifsta)
1062 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1063 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1064 ieee80211_associate(sdata, ifsta);
1068 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1069 struct ieee80211_if_sta *ifsta,
1070 struct ieee80211_mgmt *mgmt,
1074 struct ieee802_11_elems elems;
1076 pos = mgmt->u.auth.variable;
1077 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1078 if (!elems.challenge)
1080 ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
1081 elems.challenge_len + 2, 1);
1084 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1085 struct ieee80211_if_sta *ifsta,
1086 struct ieee80211_mgmt *mgmt,
1089 u16 auth_alg, auth_transaction, status_code;
1091 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
1092 sdata->vif.type != NL80211_IFTYPE_ADHOC)
1098 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
1099 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1102 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
1103 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1106 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1107 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1108 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1110 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
1112 * IEEE 802.11 standard does not require authentication in IBSS
1113 * networks and most implementations do not seem to use it.
1114 * However, try to reply to authentication attempts if someone
1115 * has actually implemented this.
1117 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
1119 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
1122 if (auth_alg != ifsta->auth_alg ||
1123 auth_transaction != ifsta->auth_transaction)
1126 if (status_code != WLAN_STATUS_SUCCESS) {
1127 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1129 const int num_algs = ARRAY_SIZE(algs);
1131 algs[0] = algs[1] = algs[2] = 0xff;
1132 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1133 algs[0] = WLAN_AUTH_OPEN;
1134 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1135 algs[1] = WLAN_AUTH_SHARED_KEY;
1136 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1137 algs[2] = WLAN_AUTH_LEAP;
1138 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1140 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1144 for (i = 0; i < num_algs; i++) {
1146 if (pos >= num_algs)
1148 if (algs[pos] == ifsta->auth_alg ||
1151 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1152 !ieee80211_sta_wep_configured(sdata))
1154 ifsta->auth_alg = algs[pos];
1161 switch (ifsta->auth_alg) {
1162 case WLAN_AUTH_OPEN:
1163 case WLAN_AUTH_LEAP:
1164 ieee80211_auth_completed(sdata, ifsta);
1166 case WLAN_AUTH_SHARED_KEY:
1167 if (ifsta->auth_transaction == 4)
1168 ieee80211_auth_completed(sdata, ifsta);
1170 ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
1176 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1177 struct ieee80211_if_sta *ifsta,
1178 struct ieee80211_mgmt *mgmt,
1186 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1189 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1191 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
1192 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1193 sdata->dev->name, reason_code);
1195 if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1196 ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
1197 ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1198 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1199 mod_timer(&ifsta->timer, jiffies +
1200 IEEE80211_RETRY_AUTH_INTERVAL);
1203 ieee80211_set_disassoc(sdata, ifsta, true, false, 0);
1204 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1208 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1209 struct ieee80211_if_sta *ifsta,
1210 struct ieee80211_mgmt *mgmt,
1218 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1221 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1223 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1224 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1225 sdata->dev->name, reason_code);
1227 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1228 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
1229 mod_timer(&ifsta->timer, jiffies +
1230 IEEE80211_RETRY_AUTH_INTERVAL);
1233 ieee80211_set_disassoc(sdata, ifsta, false, false, reason_code);
1237 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1238 struct ieee80211_if_sta *ifsta,
1239 struct ieee80211_mgmt *mgmt,
1243 struct ieee80211_local *local = sdata->local;
1244 struct ieee80211_supported_band *sband;
1245 struct sta_info *sta;
1246 u64 rates, basic_rates;
1247 u16 capab_info, status_code, aid;
1248 struct ieee802_11_elems elems;
1249 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1253 bool have_higher_than_11mbit = false, newsta = false;
1254 u16 ap_ht_cap_flags;
1256 /* AssocResp and ReassocResp have identical structure, so process both
1257 * of them in this function. */
1259 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
1265 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1268 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1269 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1270 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1272 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1273 "status=%d aid=%d)\n",
1274 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1275 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1277 if (status_code != WLAN_STATUS_SUCCESS) {
1278 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1279 sdata->dev->name, status_code);
1280 /* if this was a reassociation, ensure we try a "full"
1281 * association next time. This works around some broken APs
1282 * which do not correctly reject reassociation requests. */
1283 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1287 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1288 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1289 "set\n", sdata->dev->name, aid);
1290 aid &= ~(BIT(15) | BIT(14));
1292 pos = mgmt->u.assoc_resp.variable;
1293 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1295 if (!elems.supp_rates) {
1296 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1301 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1303 ifsta->ap_capab = capab_info;
1305 kfree(ifsta->assocresp_ies);
1306 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1307 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1308 if (ifsta->assocresp_ies)
1309 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1313 /* Add STA entry for the AP */
1314 sta = sta_info_get(local, ifsta->bssid);
1316 struct ieee80211_bss *bss;
1320 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1322 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1323 " the AP\n", sdata->dev->name);
1327 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
1328 local->hw.conf.channel->center_freq,
1329 ifsta->ssid, ifsta->ssid_len);
1331 sta->last_signal = bss->signal;
1332 sta->last_qual = bss->qual;
1333 sta->last_noise = bss->noise;
1334 ieee80211_rx_bss_put(local, bss);
1337 /* update new sta with its last rx activity */
1338 sta->last_rx = jiffies;
1342 * FIXME: Do we really need to update the sta_info's information here?
1343 * We already know about the AP (we found it in our list) so it
1344 * should already be filled with the right info, no?
1345 * As is stands, all this is racy because typically we assume
1346 * the information that is filled in here (except flags) doesn't
1347 * change while a STA structure is alive. As such, it should move
1348 * to between the sta_info_alloc() and sta_info_insert() above.
1351 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1352 WLAN_STA_AUTHORIZED);
1356 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1358 for (i = 0; i < elems.supp_rates_len; i++) {
1359 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1360 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1363 have_higher_than_11mbit = true;
1365 for (j = 0; j < sband->n_bitrates; j++) {
1366 if (sband->bitrates[j].bitrate == rate) {
1369 basic_rates |= BIT(j);
1375 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1376 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1377 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1380 have_higher_than_11mbit = true;
1382 for (j = 0; j < sband->n_bitrates; j++) {
1383 if (sband->bitrates[j].bitrate == rate) {
1386 basic_rates |= BIT(j);
1392 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1393 sdata->vif.bss_conf.basic_rates = basic_rates;
1395 /* cf. IEEE 802.11 9.2.12 */
1396 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1397 have_higher_than_11mbit)
1398 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1400 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1402 if (elems.ht_cap_elem)
1403 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1404 elems.ht_cap_elem, &sta->sta.ht_cap);
1406 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1408 rate_control_rate_init(sta);
1410 if (elems.wmm_param)
1411 set_sta_flags(sta, WLAN_STA_WME);
1414 int err = sta_info_insert(sta);
1416 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1417 " the AP (error %d)\n", sdata->dev->name, err);
1425 if (elems.wmm_param)
1426 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1427 elems.wmm_param_len);
1429 if (elems.ht_info_elem && elems.wmm_param &&
1430 (ifsta->flags & IEEE80211_STA_WMM_ENABLED))
1431 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1434 /* set AID and assoc capability,
1435 * ieee80211_set_associated() will tell the driver */
1436 bss_conf->aid = aid;
1437 bss_conf->assoc_capability = capab_info;
1438 ieee80211_set_associated(sdata, ifsta, changed);
1440 ieee80211_associated(sdata, ifsta);
1444 static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
1445 struct ieee80211_if_sta *ifsta,
1446 struct ieee80211_bss *bss)
1448 struct ieee80211_local *local = sdata->local;
1449 int res, rates, i, j;
1450 struct sk_buff *skb;
1451 struct ieee80211_mgmt *mgmt;
1453 struct ieee80211_supported_band *sband;
1454 union iwreq_data wrqu;
1456 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
1458 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1459 "response\n", sdata->dev->name);
1463 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1465 /* Remove possible STA entries from other IBSS networks. */
1466 sta_info_flush_delayed(sdata);
1468 if (local->ops->reset_tsf) {
1469 /* Reset own TSF to allow time synchronization work. */
1470 local->ops->reset_tsf(local_to_hw(local));
1472 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
1473 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
1477 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
1479 sdata->drop_unencrypted = bss->capability &
1480 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
1482 res = ieee80211_set_freq(sdata, bss->freq);
1487 /* Build IBSS probe response */
1489 skb_reserve(skb, local->hw.extra_tx_headroom);
1491 mgmt = (struct ieee80211_mgmt *)
1492 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
1493 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
1494 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1495 IEEE80211_STYPE_PROBE_RESP);
1496 memset(mgmt->da, 0xff, ETH_ALEN);
1497 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1498 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1499 mgmt->u.beacon.beacon_int =
1500 cpu_to_le16(local->hw.conf.beacon_int);
1501 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
1502 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
1504 pos = skb_put(skb, 2 + ifsta->ssid_len);
1505 *pos++ = WLAN_EID_SSID;
1506 *pos++ = ifsta->ssid_len;
1507 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
1509 rates = bss->supp_rates_len;
1512 pos = skb_put(skb, 2 + rates);
1513 *pos++ = WLAN_EID_SUPP_RATES;
1515 memcpy(pos, bss->supp_rates, rates);
1517 if (bss->band == IEEE80211_BAND_2GHZ) {
1518 pos = skb_put(skb, 2 + 1);
1519 *pos++ = WLAN_EID_DS_PARAMS;
1521 *pos++ = ieee80211_frequency_to_channel(bss->freq);
1524 pos = skb_put(skb, 2 + 2);
1525 *pos++ = WLAN_EID_IBSS_PARAMS;
1527 /* FIX: set ATIM window based on scan results */
1531 if (bss->supp_rates_len > 8) {
1532 rates = bss->supp_rates_len - 8;
1533 pos = skb_put(skb, 2 + rates);
1534 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1536 memcpy(pos, &bss->supp_rates[8], rates);
1539 ifsta->probe_resp = skb;
1541 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
1545 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1546 for (i = 0; i < bss->supp_rates_len; i++) {
1547 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
1548 for (j = 0; j < sband->n_bitrates; j++)
1549 if (sband->bitrates[j].bitrate == bitrate)
1552 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
1554 ieee80211_sta_def_wmm_params(sdata, bss);
1556 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
1557 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1559 ieee80211_led_assoc(local, true);
1561 memset(&wrqu, 0, sizeof(wrqu));
1562 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
1563 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
1568 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1569 struct ieee80211_mgmt *mgmt,
1571 struct ieee80211_rx_status *rx_status,
1572 struct ieee802_11_elems *elems,
1575 struct ieee80211_local *local = sdata->local;
1577 struct ieee80211_bss *bss;
1578 struct sta_info *sta;
1579 struct ieee80211_channel *channel;
1580 u64 beacon_timestamp, rx_timestamp;
1582 enum ieee80211_band band = rx_status->band;
1584 if (elems->ds_params && elems->ds_params_len == 1)
1585 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1587 freq = rx_status->freq;
1589 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1591 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1594 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && elems->supp_rates &&
1595 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1596 supp_rates = ieee80211_sta_get_rates(local, elems, band);
1600 sta = sta_info_get(local, mgmt->sa);
1604 prev_rates = sta->sta.supp_rates[band];
1605 /* make sure mandatory rates are always added */
1606 sta->sta.supp_rates[band] = supp_rates |
1607 ieee80211_mandatory_rates(local, band);
1609 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1610 if (sta->sta.supp_rates[band] != prev_rates)
1611 printk(KERN_DEBUG "%s: updated supp_rates set "
1612 "for %pM based on beacon info (0x%llx | "
1613 "0x%llx -> 0x%llx)\n",
1616 (unsigned long long) prev_rates,
1617 (unsigned long long) supp_rates,
1618 (unsigned long long) sta->sta.supp_rates[band]);
1621 ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates);
1627 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1632 /* was just updated in ieee80211_bss_info_update */
1633 beacon_timestamp = bss->timestamp;
1636 * In STA mode, the remaining parameters should not be overridden
1637 * by beacons because they're not necessarily accurate there.
1639 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
1640 bss->last_probe_resp && beacon) {
1641 ieee80211_rx_bss_put(local, bss);
1645 /* check if we need to merge IBSS */
1646 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && beacon &&
1647 bss->capability & WLAN_CAPABILITY_IBSS &&
1648 bss->freq == local->oper_channel->center_freq &&
1649 elems->ssid_len == sdata->u.sta.ssid_len &&
1650 memcmp(elems->ssid, sdata->u.sta.ssid,
1651 sdata->u.sta.ssid_len) == 0) {
1652 if (rx_status->flag & RX_FLAG_TSFT) {
1653 /* in order for correct IBSS merging we need mactime
1655 * since mactime is defined as the time the first data
1656 * symbol of the frame hits the PHY, and the timestamp
1657 * of the beacon is defined as "the time that the data
1658 * symbol containing the first bit of the timestamp is
1659 * transmitted to the PHY plus the transmitting STA’s
1660 * delays through its local PHY from the MAC-PHY
1661 * interface to its interface with the WM"
1662 * (802.11 11.1.2) - equals the time this bit arrives at
1663 * the receiver - we have to take into account the
1664 * offset between the two.
1665 * e.g: at 1 MBit that means mactime is 192 usec earlier
1666 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
1669 if (rx_status->flag & RX_FLAG_HT) {
1670 rate = 65; /* TODO: HT rates */
1672 rate = local->hw.wiphy->bands[band]->
1673 bitrates[rx_status->rate_idx].bitrate;
1675 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
1676 } else if (local && local->ops && local->ops->get_tsf)
1677 /* second best option: get current TSF */
1678 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
1680 /* can't merge without knowing the TSF */
1681 rx_timestamp = -1LLU;
1682 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1683 printk(KERN_DEBUG "RX beacon SA=%pM BSSID="
1684 "%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
1685 mgmt->sa, mgmt->bssid,
1686 (unsigned long long)rx_timestamp,
1687 (unsigned long long)beacon_timestamp,
1688 (unsigned long long)(rx_timestamp - beacon_timestamp),
1690 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1691 if (beacon_timestamp > rx_timestamp) {
1692 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1693 printk(KERN_DEBUG "%s: beacon TSF higher than "
1694 "local TSF - IBSS merge with BSSID %pM\n",
1695 sdata->dev->name, mgmt->bssid);
1697 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
1698 ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates);
1702 ieee80211_rx_bss_put(local, bss);
1706 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1707 struct ieee80211_mgmt *mgmt,
1709 struct ieee80211_rx_status *rx_status)
1712 struct ieee802_11_elems elems;
1713 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1715 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1716 return; /* ignore ProbeResp to foreign address */
1718 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1722 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1725 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1727 /* direct probe may be part of the association flow */
1728 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1730 printk(KERN_DEBUG "%s direct probe responded\n",
1732 ieee80211_authenticate(sdata, ifsta);
1737 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1738 struct ieee80211_mgmt *mgmt,
1740 struct ieee80211_rx_status *rx_status)
1742 struct ieee80211_if_sta *ifsta;
1744 struct ieee802_11_elems elems;
1745 struct ieee80211_local *local = sdata->local;
1747 bool erp_valid, directed_tim, is_mc = false;
1750 /* Process beacon from the current BSS */
1751 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1755 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1757 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
1759 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1761 ifsta = &sdata->u.sta;
1763 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
1764 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1767 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1768 elems.wmm_param_len);
1770 if (!(local->hw.flags & IEEE80211_HW_NO_STACK_DYNAMIC_PS)) {
1771 directed_tim = check_tim(&elems, ifsta->aid, &is_mc);
1773 if (directed_tim || is_mc) {
1774 if (local->hw.conf.flags && IEEE80211_CONF_PS) {
1775 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1776 ieee80211_hw_config(local,
1777 IEEE80211_CONF_CHANGE_PS);
1778 ieee80211_send_nullfunc(local, sdata, 0);
1783 if (elems.erp_info && elems.erp_info_len >= 1) {
1785 erp_value = elems.erp_info[0];
1789 changed |= ieee80211_handle_bss_capability(sdata,
1790 le16_to_cpu(mgmt->u.beacon.capab_info),
1791 erp_valid, erp_value);
1794 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param) {
1795 struct sta_info *sta;
1796 struct ieee80211_supported_band *sband;
1797 u16 ap_ht_cap_flags;
1801 sta = sta_info_get(local, ifsta->bssid);
1807 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1809 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1810 elems.ht_cap_elem, &sta->sta.ht_cap);
1812 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1816 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1820 if (elems.country_elem) {
1821 /* Note we are only reviewing this on beacons
1822 * for the BSSID we are associated to */
1823 regulatory_hint_11d(local->hw.wiphy,
1824 elems.country_elem, elems.country_elem_len);
1827 ieee80211_bss_info_change_notify(sdata, changed);
1831 static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
1832 struct ieee80211_if_sta *ifsta,
1833 struct ieee80211_mgmt *mgmt,
1835 struct ieee80211_rx_status *rx_status)
1837 struct ieee80211_local *local = sdata->local;
1839 struct sk_buff *skb;
1840 struct ieee80211_mgmt *resp;
1843 if (sdata->vif.type != NL80211_IFTYPE_ADHOC ||
1844 ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
1845 len < 24 + 2 || !ifsta->probe_resp)
1848 if (local->ops->tx_last_beacon)
1849 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1853 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1854 printk(KERN_DEBUG "%s: RX ProbeReq SA=%pM DA=%pM BSSID=%pM"
1855 " (tx_last_beacon=%d)\n",
1856 sdata->dev->name, mgmt->sa, mgmt->da,
1857 mgmt->bssid, tx_last_beacon);
1858 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1860 if (!tx_last_beacon)
1863 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1864 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1867 end = ((u8 *) mgmt) + len;
1868 pos = mgmt->u.probe_req.variable;
1869 if (pos[0] != WLAN_EID_SSID ||
1870 pos + 2 + pos[1] > end) {
1871 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1872 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
1874 sdata->dev->name, mgmt->sa);
1879 (pos[1] != ifsta->ssid_len ||
1880 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1881 /* Ignore ProbeReq for foreign SSID */
1885 /* Reply with ProbeResp */
1886 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
1890 resp = (struct ieee80211_mgmt *) skb->data;
1891 memcpy(resp->da, mgmt->sa, ETH_ALEN);
1892 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1893 printk(KERN_DEBUG "%s: Sending ProbeResp to %pM\n",
1894 sdata->dev->name, resp->da);
1895 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1896 ieee80211_tx_skb(sdata, skb, 0);
1899 void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
1900 struct ieee80211_rx_status *rx_status)
1902 struct ieee80211_local *local = sdata->local;
1903 struct ieee80211_if_sta *ifsta;
1904 struct ieee80211_mgmt *mgmt;
1910 ifsta = &sdata->u.sta;
1912 mgmt = (struct ieee80211_mgmt *) skb->data;
1913 fc = le16_to_cpu(mgmt->frame_control);
1915 switch (fc & IEEE80211_FCTL_STYPE) {
1916 case IEEE80211_STYPE_PROBE_REQ:
1917 case IEEE80211_STYPE_PROBE_RESP:
1918 case IEEE80211_STYPE_BEACON:
1919 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1920 case IEEE80211_STYPE_AUTH:
1921 case IEEE80211_STYPE_ASSOC_RESP:
1922 case IEEE80211_STYPE_REASSOC_RESP:
1923 case IEEE80211_STYPE_DEAUTH:
1924 case IEEE80211_STYPE_DISASSOC:
1925 skb_queue_tail(&ifsta->skb_queue, skb);
1926 queue_work(local->hw.workqueue, &ifsta->work);
1934 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1935 struct sk_buff *skb)
1937 struct ieee80211_rx_status *rx_status;
1938 struct ieee80211_if_sta *ifsta;
1939 struct ieee80211_mgmt *mgmt;
1942 ifsta = &sdata->u.sta;
1944 rx_status = (struct ieee80211_rx_status *) skb->cb;
1945 mgmt = (struct ieee80211_mgmt *) skb->data;
1946 fc = le16_to_cpu(mgmt->frame_control);
1948 switch (fc & IEEE80211_FCTL_STYPE) {
1949 case IEEE80211_STYPE_PROBE_REQ:
1950 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len,
1953 case IEEE80211_STYPE_PROBE_RESP:
1954 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
1956 case IEEE80211_STYPE_BEACON:
1957 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
1959 case IEEE80211_STYPE_AUTH:
1960 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
1962 case IEEE80211_STYPE_ASSOC_RESP:
1963 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
1965 case IEEE80211_STYPE_REASSOC_RESP:
1966 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
1968 case IEEE80211_STYPE_DEAUTH:
1969 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
1971 case IEEE80211_STYPE_DISASSOC:
1972 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
1980 static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
1982 struct ieee80211_local *local = sdata->local;
1984 struct sta_info *sta;
1988 list_for_each_entry_rcu(sta, &local->sta_list, list) {
1989 if (sta->sdata == sdata &&
1990 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2003 static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
2004 struct ieee80211_if_sta *ifsta)
2006 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2008 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
2009 if (ieee80211_sta_active_ibss(sdata))
2012 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
2013 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
2014 ieee80211_request_scan(sdata, ifsta->ssid, ifsta->ssid_len);
2018 static void ieee80211_sta_timer(unsigned long data)
2020 struct ieee80211_sub_if_data *sdata =
2021 (struct ieee80211_sub_if_data *) data;
2022 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2023 struct ieee80211_local *local = sdata->local;
2025 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2026 queue_work(local->hw.workqueue, &ifsta->work);
2029 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
2030 struct ieee80211_if_sta *ifsta)
2032 struct ieee80211_local *local = sdata->local;
2034 if (local->ops->reset_tsf) {
2035 /* Reset own TSF to allow time synchronization work. */
2036 local->ops->reset_tsf(local_to_hw(local));
2039 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2042 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2043 ifsta->auth_alg = WLAN_AUTH_OPEN;
2044 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2045 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2046 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2047 ifsta->auth_alg = WLAN_AUTH_LEAP;
2049 ifsta->auth_alg = WLAN_AUTH_OPEN;
2050 ifsta->auth_transaction = -1;
2051 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
2052 ifsta->assoc_scan_tries = 0;
2053 ifsta->direct_probe_tries = 0;
2054 ifsta->auth_tries = 0;
2055 ifsta->assoc_tries = 0;
2056 netif_tx_stop_all_queues(sdata->dev);
2057 netif_carrier_off(sdata->dev);
2061 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2062 const char *ssid, int ssid_len)
2064 int tmp, hidden_ssid;
2066 if (ssid_len == ifsta->ssid_len &&
2067 !memcmp(ifsta->ssid, ssid, ssid_len))
2070 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2076 if (ssid[tmp] != '\0') {
2082 if (hidden_ssid && (ifsta->ssid_len == ssid_len || ssid_len == 0))
2085 if (ssid_len == 1 && ssid[0] == ' ')
2091 static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
2092 struct ieee80211_if_sta *ifsta)
2094 struct ieee80211_local *local = sdata->local;
2095 struct ieee80211_bss *bss;
2096 struct ieee80211_supported_band *sband;
2097 u8 bssid[ETH_ALEN], *pos;
2102 /* Easier testing, use fixed BSSID. */
2103 memset(bssid, 0xfe, ETH_ALEN);
2105 /* Generate random, not broadcast, locally administered BSSID. Mix in
2106 * own MAC address to make sure that devices that do not have proper
2107 * random number generator get different BSSID. */
2108 get_random_bytes(bssid, ETH_ALEN);
2109 for (i = 0; i < ETH_ALEN; i++)
2110 bssid[i] ^= sdata->dev->dev_addr[i];
2115 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %pM\n",
2116 sdata->dev->name, bssid);
2118 bss = ieee80211_rx_bss_add(local, bssid,
2119 local->hw.conf.channel->center_freq,
2120 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
2124 bss->band = local->hw.conf.channel->band;
2125 sband = local->hw.wiphy->bands[bss->band];
2127 if (local->hw.conf.beacon_int == 0)
2128 local->hw.conf.beacon_int = 100;
2129 bss->beacon_int = local->hw.conf.beacon_int;
2130 bss->last_update = jiffies;
2131 bss->capability = WLAN_CAPABILITY_IBSS;
2133 if (sdata->default_key)
2134 bss->capability |= WLAN_CAPABILITY_PRIVACY;
2136 sdata->drop_unencrypted = 0;
2138 bss->supp_rates_len = sband->n_bitrates;
2139 pos = bss->supp_rates;
2140 for (i = 0; i < sband->n_bitrates; i++) {
2141 int rate = sband->bitrates[i].bitrate;
2142 *pos++ = (u8) (rate / 5);
2145 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
2146 ieee80211_rx_bss_put(local, bss);
2151 static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
2152 struct ieee80211_if_sta *ifsta)
2154 struct ieee80211_local *local = sdata->local;
2155 struct ieee80211_bss *bss;
2160 if (ifsta->ssid_len == 0)
2163 active_ibss = ieee80211_sta_active_ibss(sdata);
2164 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2165 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2166 sdata->dev->name, active_ibss);
2167 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2168 spin_lock_bh(&local->bss_lock);
2169 list_for_each_entry(bss, &local->bss_list, list) {
2170 if (ifsta->ssid_len != bss->ssid_len ||
2171 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2172 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2174 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2175 printk(KERN_DEBUG " bssid=%pM found\n", bss->bssid);
2176 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2177 memcpy(bssid, bss->bssid, ETH_ALEN);
2179 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2182 spin_unlock_bh(&local->bss_lock);
2184 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2186 printk(KERN_DEBUG " sta_find_ibss: selected %pM current "
2187 "%pM\n", bssid, ifsta->bssid);
2188 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2190 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2194 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2195 search_freq = bss->freq;
2197 search_freq = local->hw.conf.channel->center_freq;
2199 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
2200 ifsta->ssid, ifsta->ssid_len);
2204 printk(KERN_DEBUG "%s: Selected IBSS BSSID %pM"
2205 " based on configured SSID\n",
2206 sdata->dev->name, bssid);
2207 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
2208 ieee80211_rx_bss_put(local, bss);
2213 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2214 printk(KERN_DEBUG " did not try to join ibss\n");
2215 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2217 /* Selected IBSS not found in current scan results - try to scan */
2218 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
2219 !ieee80211_sta_active_ibss(sdata)) {
2220 mod_timer(&ifsta->timer, jiffies +
2221 IEEE80211_IBSS_MERGE_INTERVAL);
2222 } else if (time_after(jiffies, local->last_scan_completed +
2223 IEEE80211_SCAN_INTERVAL)) {
2224 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
2225 "join\n", sdata->dev->name);
2226 return ieee80211_request_scan(sdata, ifsta->ssid,
2228 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
2229 int interval = IEEE80211_SCAN_INTERVAL;
2231 if (time_after(jiffies, ifsta->ibss_join_req +
2232 IEEE80211_IBSS_JOIN_TIMEOUT)) {
2233 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
2234 (!(local->oper_channel->flags &
2235 IEEE80211_CHAN_NO_IBSS)))
2236 return ieee80211_sta_create_ibss(sdata, ifsta);
2237 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
2238 printk(KERN_DEBUG "%s: IBSS not allowed on"
2239 " %d MHz\n", sdata->dev->name,
2240 local->hw.conf.channel->center_freq);
2243 /* No IBSS found - decrease scan interval and continue
2245 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2248 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2249 mod_timer(&ifsta->timer, jiffies + interval);
2257 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
2258 struct ieee80211_if_sta *ifsta)
2260 struct ieee80211_local *local = sdata->local;
2261 struct ieee80211_bss *bss, *selected = NULL;
2262 int top_rssi = 0, freq;
2264 spin_lock_bh(&local->bss_lock);
2265 freq = local->oper_channel->center_freq;
2266 list_for_each_entry(bss, &local->bss_list, list) {
2267 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2270 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2271 IEEE80211_STA_AUTO_BSSID_SEL |
2272 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
2273 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2274 !!sdata->default_key))
2277 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2281 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2282 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2285 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2286 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2289 if (!selected || top_rssi < bss->signal) {
2291 top_rssi = bss->signal;
2295 atomic_inc(&selected->users);
2296 spin_unlock_bh(&local->bss_lock);
2299 ieee80211_set_freq(sdata, selected->freq);
2300 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2301 ieee80211_sta_set_ssid(sdata, selected->ssid,
2302 selected->ssid_len);
2303 ieee80211_sta_set_bssid(sdata, selected->bssid);
2304 ieee80211_sta_def_wmm_params(sdata, selected);
2306 /* Send out direct probe if no probe resp was received or
2307 * the one we have is outdated
2309 if (!selected->last_probe_resp ||
2310 time_after(jiffies, selected->last_probe_resp
2311 + IEEE80211_SCAN_RESULT_EXPIRE))
2312 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2314 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2316 ieee80211_rx_bss_put(local, selected);
2317 ieee80211_sta_reset_auth(sdata, ifsta);
2320 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2321 ifsta->assoc_scan_tries++;
2322 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
2323 ieee80211_start_scan(sdata, NULL, 0);
2325 ieee80211_start_scan(sdata, ifsta->ssid,
2327 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2328 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2330 ifsta->state = IEEE80211_STA_MLME_DISABLED;
2336 static void ieee80211_sta_work(struct work_struct *work)
2338 struct ieee80211_sub_if_data *sdata =
2339 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2340 struct ieee80211_local *local = sdata->local;
2341 struct ieee80211_if_sta *ifsta;
2342 struct sk_buff *skb;
2344 if (!netif_running(sdata->dev))
2347 if (local->sw_scanning || local->hw_scanning)
2350 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION &&
2351 sdata->vif.type != NL80211_IFTYPE_ADHOC))
2353 ifsta = &sdata->u.sta;
2355 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2356 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2358 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2359 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2360 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
2361 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
2362 ieee80211_start_scan(sdata, ifsta->scan_ssid,
2363 ifsta->scan_ssid_len);
2367 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2368 if (ieee80211_sta_config_auth(sdata, ifsta))
2370 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2371 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2374 switch (ifsta->state) {
2375 case IEEE80211_STA_MLME_DISABLED:
2377 case IEEE80211_STA_MLME_DIRECT_PROBE:
2378 ieee80211_direct_probe(sdata, ifsta);
2380 case IEEE80211_STA_MLME_AUTHENTICATE:
2381 ieee80211_authenticate(sdata, ifsta);
2383 case IEEE80211_STA_MLME_ASSOCIATE:
2384 ieee80211_associate(sdata, ifsta);
2386 case IEEE80211_STA_MLME_ASSOCIATED:
2387 ieee80211_associated(sdata, ifsta);
2389 case IEEE80211_STA_MLME_IBSS_SEARCH:
2390 ieee80211_sta_find_ibss(sdata, ifsta);
2392 case IEEE80211_STA_MLME_IBSS_JOINED:
2393 ieee80211_sta_merge_ibss(sdata, ifsta);
2400 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
2401 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2402 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2404 ieee80211_set_disassoc(sdata, ifsta, false, true,
2405 WLAN_REASON_UNSPECIFIED);
2409 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2411 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2412 queue_work(sdata->local->hw.workqueue,
2413 &sdata->u.sta.work);
2416 /* interface setup */
2417 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2419 struct ieee80211_if_sta *ifsta;
2421 ifsta = &sdata->u.sta;
2422 INIT_WORK(&ifsta->work, ieee80211_sta_work);
2423 setup_timer(&ifsta->timer, ieee80211_sta_timer,
2424 (unsigned long) sdata);
2425 skb_queue_head_init(&ifsta->skb_queue);
2427 ifsta->capab = WLAN_CAPABILITY_ESS;
2428 ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2429 IEEE80211_AUTH_ALG_SHARED_KEY;
2430 ifsta->flags |= IEEE80211_STA_CREATE_IBSS |
2431 IEEE80211_STA_AUTO_BSSID_SEL |
2432 IEEE80211_STA_AUTO_CHANNEL_SEL;
2433 if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4)
2434 ifsta->flags |= IEEE80211_STA_WMM_ENABLED;
2438 * Add a new IBSS station, will also be called by the RX code when,
2439 * in IBSS mode, receiving a frame from a yet-unknown station, hence
2440 * must be callable in atomic context.
2442 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
2443 u8 *bssid,u8 *addr, u64 supp_rates)
2445 struct ieee80211_local *local = sdata->local;
2446 struct sta_info *sta;
2447 int band = local->hw.conf.channel->band;
2449 /* TODO: Could consider removing the least recently used entry and
2450 * allow new one to be added. */
2451 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
2452 if (net_ratelimit()) {
2453 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
2454 "entry %pM\n", sdata->dev->name, addr);
2459 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
2462 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2463 printk(KERN_DEBUG "%s: Adding new IBSS station %pM (dev=%s)\n",
2464 wiphy_name(local->hw.wiphy), addr, sdata->dev->name);
2467 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
2471 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
2473 /* make sure mandatory rates are always added */
2474 sta->sta.supp_rates[band] = supp_rates |
2475 ieee80211_mandatory_rates(local, band);
2477 rate_control_rate_init(sta);
2479 if (sta_info_insert(sta))
2485 /* configuration hooks */
2486 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
2487 struct ieee80211_if_sta *ifsta)
2489 struct ieee80211_local *local = sdata->local;
2491 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2494 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2495 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2496 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2497 IEEE80211_STA_AUTO_SSID_SEL))) {
2499 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED)
2500 ieee80211_set_disassoc(sdata, ifsta, true, true,
2501 WLAN_REASON_DEAUTH_LEAVING);
2503 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2504 queue_work(local->hw.workqueue, &ifsta->work);
2508 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2510 struct ieee80211_if_sta *ifsta;
2512 if (len > IEEE80211_MAX_SSID_LEN)
2515 ifsta = &sdata->u.sta;
2517 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
2518 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
2519 memcpy(ifsta->ssid, ssid, len);
2520 ifsta->ssid_len = len;
2521 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2525 ifsta->flags |= IEEE80211_STA_SSID_SET;
2527 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
2529 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
2530 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
2531 ifsta->ibss_join_req = jiffies;
2532 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2533 return ieee80211_sta_find_ibss(sdata, ifsta);
2539 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2541 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2542 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2543 *len = ifsta->ssid_len;
2547 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2549 struct ieee80211_if_sta *ifsta;
2553 ifsta = &sdata->u.sta;
2554 valid = is_valid_ether_addr(bssid);
2556 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2558 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2560 memset(ifsta->bssid, 0, ETH_ALEN);
2563 * Hack! See also ieee80211_sta_set_ssid.
2565 if (netif_running(sdata->dev))
2566 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
2568 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2569 "the low-level driver\n", sdata->dev->name);
2575 ifsta->flags |= IEEE80211_STA_BSSID_SET;
2577 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
2582 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
2584 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2586 kfree(ifsta->extra_ie);
2588 ifsta->extra_ie = NULL;
2589 ifsta->extra_ie_len = 0;
2592 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
2593 if (!ifsta->extra_ie) {
2594 ifsta->extra_ie_len = 0;
2597 memcpy(ifsta->extra_ie, ie, len);
2598 ifsta->extra_ie_len = len;
2602 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2604 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2606 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2607 sdata->dev->name, reason);
2609 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
2610 sdata->vif.type != NL80211_IFTYPE_ADHOC)
2613 ieee80211_set_disassoc(sdata, ifsta, true, true, reason);
2617 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2619 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2621 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2622 sdata->dev->name, reason);
2624 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2627 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
2630 ieee80211_set_disassoc(sdata, ifsta, false, true, reason);
2634 /* scan finished notification */
2635 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2637 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2638 struct ieee80211_if_sta *ifsta;
2640 if (sdata && sdata->vif.type == NL80211_IFTYPE_ADHOC) {
2641 ifsta = &sdata->u.sta;
2642 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
2643 (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) &&
2644 !ieee80211_sta_active_ibss(sdata)))
2645 ieee80211_sta_find_ibss(sdata, ifsta);
2648 /* Restart STA timers */
2650 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2651 ieee80211_restart_sta_timer(sdata);
2655 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
2657 struct ieee80211_local *local =
2658 container_of(work, struct ieee80211_local,
2659 dynamic_ps_disable_work);
2661 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2662 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2663 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2666 ieee80211_wake_queues_by_reason(&local->hw,
2667 IEEE80211_QUEUE_STOP_REASON_PS);
2670 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
2672 struct ieee80211_local *local =
2673 container_of(work, struct ieee80211_local,
2674 dynamic_ps_enable_work);
2675 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2677 if (local->hw.conf.flags & IEEE80211_CONF_PS)
2680 ieee80211_send_nullfunc(local, sdata, 1);
2681 local->hw.conf.flags |= IEEE80211_CONF_PS;
2683 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2686 void ieee80211_dynamic_ps_timer(unsigned long data)
2688 struct ieee80211_local *local = (void *) data;
2690 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);