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.reassoc_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 */
394 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
395 sband->ht_cap.ht_supported &&
396 (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) &&
397 ht_ie[1] >= sizeof(struct ieee80211_ht_info)) {
398 struct ieee80211_ht_info *ht_info =
399 (struct ieee80211_ht_info *)(ht_ie + 2);
400 u16 cap = sband->ht_cap.cap;
402 u32 flags = local->hw.conf.channel->flags;
404 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
405 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
406 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
407 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
408 cap &= ~IEEE80211_HT_CAP_SGI_40;
411 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
412 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
413 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
414 cap &= ~IEEE80211_HT_CAP_SGI_40;
419 tmp = cpu_to_le16(cap);
420 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
421 *pos++ = WLAN_EID_HT_CAPABILITY;
422 *pos++ = sizeof(struct ieee80211_ht_cap);
423 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
424 memcpy(pos, &tmp, sizeof(u16));
426 /* TODO: needs a define here for << 2 */
427 *pos++ = sband->ht_cap.ampdu_factor |
428 (sband->ht_cap.ampdu_density << 2);
429 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
432 kfree(ifsta->assocreq_ies);
433 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
434 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
435 if (ifsta->assocreq_ies)
436 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
438 ieee80211_tx_skb(sdata, skb, 0);
442 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
443 u16 stype, u16 reason)
445 struct ieee80211_local *local = sdata->local;
446 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
448 struct ieee80211_mgmt *mgmt;
450 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
452 printk(KERN_DEBUG "%s: failed to allocate buffer for "
453 "deauth/disassoc frame\n", sdata->dev->name);
456 skb_reserve(skb, local->hw.extra_tx_headroom);
458 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
460 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
461 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
462 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
463 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
465 /* u.deauth.reason_code == u.disassoc.reason_code */
466 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
468 ieee80211_tx_skb(sdata, skb, 0);
472 static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
473 struct ieee80211_bss *bss)
475 struct ieee80211_local *local = sdata->local;
476 int i, have_higher_than_11mbit = 0;
478 /* cf. IEEE 802.11 9.2.12 */
479 for (i = 0; i < bss->supp_rates_len; i++)
480 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
481 have_higher_than_11mbit = 1;
483 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
484 have_higher_than_11mbit)
485 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
487 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
489 ieee80211_set_wmm_default(sdata);
492 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
493 struct ieee80211_if_sta *ifsta,
494 u8 *wmm_param, size_t wmm_param_len)
496 struct ieee80211_tx_queue_params params;
501 if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
507 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
509 count = wmm_param[6] & 0x0f;
510 if (count == ifsta->wmm_last_param_set)
512 ifsta->wmm_last_param_set = count;
515 left = wmm_param_len - 8;
517 memset(¶ms, 0, sizeof(params));
519 if (!local->ops->conf_tx)
523 for (; left >= 4; left -= 4, pos += 4) {
524 int aci = (pos[0] >> 5) & 0x03;
525 int acm = (pos[0] >> 4) & 0x01;
532 local->wmm_acm |= BIT(0) | BIT(3);
537 local->wmm_acm |= BIT(4) | BIT(5);
542 local->wmm_acm |= BIT(6) | BIT(7);
548 local->wmm_acm |= BIT(1) | BIT(2);
552 params.aifs = pos[0] & 0x0f;
553 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
554 params.cw_min = ecw2cw(pos[1] & 0x0f);
555 params.txop = get_unaligned_le16(pos + 2);
556 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
557 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
558 "cWmin=%d cWmax=%d txop=%d\n",
559 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
560 params.cw_max, params.txop);
562 /* TODO: handle ACM (block TX, fallback to next lowest allowed
564 if (local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) {
565 printk(KERN_DEBUG "%s: failed to set TX queue "
566 "parameters for queue %d\n", local->mdev->name, queue);
571 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
572 u16 capab, bool erp_valid, u8 erp)
574 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
575 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
576 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
580 bool use_short_preamble;
584 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
585 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
587 use_protection = false;
588 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
591 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
593 if (use_protection != bss_conf->use_cts_prot) {
594 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
595 if (net_ratelimit()) {
596 printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
598 use_protection ? "enabled" : "disabled",
602 bss_conf->use_cts_prot = use_protection;
603 changed |= BSS_CHANGED_ERP_CTS_PROT;
606 if (use_short_preamble != bss_conf->use_short_preamble) {
607 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
608 if (net_ratelimit()) {
609 printk(KERN_DEBUG "%s: switched to %s barker preamble"
612 use_short_preamble ? "short" : "long",
616 bss_conf->use_short_preamble = use_short_preamble;
617 changed |= BSS_CHANGED_ERP_PREAMBLE;
620 if (use_short_slot != bss_conf->use_short_slot) {
621 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
622 if (net_ratelimit()) {
623 printk(KERN_DEBUG "%s: switched to %s slot"
626 use_short_slot ? "short" : "long",
630 bss_conf->use_short_slot = use_short_slot;
631 changed |= BSS_CHANGED_ERP_SLOT;
637 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata,
638 struct ieee80211_if_sta *ifsta)
640 union iwreq_data wrqu;
641 memset(&wrqu, 0, sizeof(wrqu));
642 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
643 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
644 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
645 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
648 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata,
649 struct ieee80211_if_sta *ifsta)
654 union iwreq_data wrqu;
656 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
659 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
660 ifsta->assocresp_ies_len), GFP_KERNEL);
664 len = sprintf(buf, "ASSOCINFO(");
665 if (ifsta->assocreq_ies) {
666 len += sprintf(buf + len, "ReqIEs=");
667 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
668 len += sprintf(buf + len, "%02x",
669 ifsta->assocreq_ies[i]);
672 if (ifsta->assocresp_ies) {
673 if (ifsta->assocreq_ies)
674 len += sprintf(buf + len, " ");
675 len += sprintf(buf + len, "RespIEs=");
676 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
677 len += sprintf(buf + len, "%02x",
678 ifsta->assocresp_ies[i]);
681 len += sprintf(buf + len, ")");
683 if (len > IW_CUSTOM_MAX) {
684 len = sprintf(buf, "ASSOCRESPIE=");
685 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
686 len += sprintf(buf + len, "%02x",
687 ifsta->assocresp_ies[i]);
691 if (len <= IW_CUSTOM_MAX) {
692 memset(&wrqu, 0, sizeof(wrqu));
693 wrqu.data.length = len;
694 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
701 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
702 struct ieee80211_if_sta *ifsta,
703 u32 bss_info_changed)
705 struct ieee80211_local *local = sdata->local;
706 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
708 struct ieee80211_bss *bss;
710 bss_info_changed |= BSS_CHANGED_ASSOC;
711 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
713 if (sdata->vif.type != NL80211_IFTYPE_STATION)
716 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
717 conf->channel->center_freq,
718 ifsta->ssid, ifsta->ssid_len);
720 /* set timing information */
721 sdata->vif.bss_conf.beacon_int = bss->beacon_int;
722 sdata->vif.bss_conf.timestamp = bss->timestamp;
723 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
725 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
726 bss->capability, bss->has_erp_value, bss->erp_value);
728 ieee80211_rx_bss_put(local, bss);
731 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
732 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
733 ieee80211_sta_send_associnfo(sdata, ifsta);
735 ifsta->last_probe = jiffies;
736 ieee80211_led_assoc(local, 1);
738 sdata->vif.bss_conf.assoc = 1;
740 * For now just always ask the driver to update the basic rateset
741 * when we have associated, we aren't checking whether it actually
744 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
745 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
747 netif_tx_start_all_queues(sdata->dev);
748 netif_carrier_on(sdata->dev);
750 ieee80211_sta_send_apinfo(sdata, ifsta);
753 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
754 struct ieee80211_if_sta *ifsta)
756 ifsta->direct_probe_tries++;
757 if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
758 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
759 sdata->dev->name, ifsta->bssid);
760 ifsta->state = IEEE80211_STA_MLME_DISABLED;
761 ieee80211_sta_send_apinfo(sdata, ifsta);
765 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
766 sdata->dev->name, ifsta->bssid,
767 ifsta->direct_probe_tries);
769 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
771 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request);
773 /* Direct probe is sent to broadcast address as some APs
774 * will not answer to direct packet in unassociated state.
776 ieee80211_send_probe_req(sdata, NULL,
777 ifsta->ssid, ifsta->ssid_len);
779 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
783 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
784 struct ieee80211_if_sta *ifsta)
787 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
788 printk(KERN_DEBUG "%s: authentication with AP %pM"
790 sdata->dev->name, ifsta->bssid);
791 ifsta->state = IEEE80211_STA_MLME_DISABLED;
792 ieee80211_sta_send_apinfo(sdata, ifsta);
796 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
797 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
798 sdata->dev->name, ifsta->bssid);
800 ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
802 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
805 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
806 struct ieee80211_if_sta *ifsta, bool deauth,
807 bool self_disconnected, u16 reason)
809 struct ieee80211_local *local = sdata->local;
810 struct sta_info *sta;
815 sta = sta_info_get(local, ifsta->bssid);
822 ifsta->direct_probe_tries = 0;
823 ifsta->auth_tries = 0;
825 ifsta->assoc_scan_tries = 0;
826 ifsta->assoc_tries = 0;
828 netif_tx_stop_all_queues(sdata->dev);
829 netif_carrier_off(sdata->dev);
831 ieee80211_sta_tear_down_BA_sessions(sdata, sta->sta.addr);
833 if (self_disconnected) {
835 ieee80211_send_deauth_disassoc(sdata,
836 IEEE80211_STYPE_DEAUTH, reason);
838 ieee80211_send_deauth_disassoc(sdata,
839 IEEE80211_STYPE_DISASSOC, reason);
842 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
843 changed |= ieee80211_reset_erp_info(sdata);
845 ieee80211_led_assoc(local, 0);
846 changed |= BSS_CHANGED_ASSOC;
847 sdata->vif.bss_conf.assoc = false;
849 ieee80211_sta_send_apinfo(sdata, ifsta);
851 if (self_disconnected)
852 ifsta->state = IEEE80211_STA_MLME_DISABLED;
854 sta_info_unlink(&sta);
858 sta_info_destroy(sta);
860 local->hw.conf.ht.enabled = false;
861 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_HT);
863 ieee80211_bss_info_change_notify(sdata, changed);
866 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
868 if (!sdata || !sdata->default_key ||
869 sdata->default_key->conf.alg != ALG_WEP)
874 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
875 struct ieee80211_if_sta *ifsta)
877 struct ieee80211_local *local = sdata->local;
878 struct ieee80211_bss *bss;
883 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
886 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
887 local->hw.conf.channel->center_freq,
888 ifsta->ssid, ifsta->ssid_len);
892 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
893 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
894 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
896 ieee80211_rx_bss_put(local, bss);
898 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
904 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
905 struct ieee80211_if_sta *ifsta)
907 ifsta->assoc_tries++;
908 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
909 printk(KERN_DEBUG "%s: association with AP %pM"
911 sdata->dev->name, ifsta->bssid);
912 ifsta->state = IEEE80211_STA_MLME_DISABLED;
913 ieee80211_sta_send_apinfo(sdata, ifsta);
917 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
918 printk(KERN_DEBUG "%s: associate with AP %pM\n",
919 sdata->dev->name, ifsta->bssid);
920 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
921 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
922 "mixed-cell disabled - abort association\n", sdata->dev->name);
923 ifsta->state = IEEE80211_STA_MLME_DISABLED;
927 ieee80211_send_assoc(sdata, ifsta);
929 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
933 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
934 struct ieee80211_if_sta *ifsta)
936 struct ieee80211_local *local = sdata->local;
937 struct sta_info *sta;
940 /* TODO: start monitoring current AP signal quality and number of
941 * missed beacons. Scan other channels every now and then and search
943 /* TODO: remove expired BSSes */
945 ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
949 sta = sta_info_get(local, ifsta->bssid);
951 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
952 sdata->dev->name, ifsta->bssid);
956 if (time_after(jiffies,
957 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
958 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
959 printk(KERN_DEBUG "%s: No ProbeResp from "
960 "current AP %pM - assume out of "
962 sdata->dev->name, ifsta->bssid);
965 ieee80211_send_probe_req(sdata, ifsta->bssid,
968 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
970 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
971 if (time_after(jiffies, ifsta->last_probe +
972 IEEE80211_PROBE_INTERVAL)) {
973 ifsta->last_probe = jiffies;
974 ieee80211_send_probe_req(sdata, ifsta->bssid,
984 ieee80211_set_disassoc(sdata, ifsta, true, true,
985 WLAN_REASON_PREV_AUTH_NOT_VALID);
987 mod_timer(&ifsta->timer, jiffies +
988 IEEE80211_MONITORING_INTERVAL);
992 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
993 struct ieee80211_if_sta *ifsta)
995 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
996 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
997 ieee80211_associate(sdata, ifsta);
1001 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1002 struct ieee80211_if_sta *ifsta,
1003 struct ieee80211_mgmt *mgmt,
1007 struct ieee802_11_elems elems;
1009 pos = mgmt->u.auth.variable;
1010 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1011 if (!elems.challenge)
1013 ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
1014 elems.challenge_len + 2, 1);
1017 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1018 struct ieee80211_if_sta *ifsta,
1019 struct ieee80211_mgmt *mgmt,
1022 u16 auth_alg, auth_transaction, status_code;
1024 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
1025 sdata->vif.type != NL80211_IFTYPE_ADHOC)
1031 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
1032 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1035 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
1036 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1039 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1040 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1041 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1043 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
1045 * IEEE 802.11 standard does not require authentication in IBSS
1046 * networks and most implementations do not seem to use it.
1047 * However, try to reply to authentication attempts if someone
1048 * has actually implemented this.
1050 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
1052 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
1055 if (auth_alg != ifsta->auth_alg ||
1056 auth_transaction != ifsta->auth_transaction)
1059 if (status_code != WLAN_STATUS_SUCCESS) {
1060 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1062 const int num_algs = ARRAY_SIZE(algs);
1064 algs[0] = algs[1] = algs[2] = 0xff;
1065 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1066 algs[0] = WLAN_AUTH_OPEN;
1067 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1068 algs[1] = WLAN_AUTH_SHARED_KEY;
1069 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1070 algs[2] = WLAN_AUTH_LEAP;
1071 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1073 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1077 for (i = 0; i < num_algs; i++) {
1079 if (pos >= num_algs)
1081 if (algs[pos] == ifsta->auth_alg ||
1084 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1085 !ieee80211_sta_wep_configured(sdata))
1087 ifsta->auth_alg = algs[pos];
1094 switch (ifsta->auth_alg) {
1095 case WLAN_AUTH_OPEN:
1096 case WLAN_AUTH_LEAP:
1097 ieee80211_auth_completed(sdata, ifsta);
1099 case WLAN_AUTH_SHARED_KEY:
1100 if (ifsta->auth_transaction == 4)
1101 ieee80211_auth_completed(sdata, ifsta);
1103 ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
1109 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1110 struct ieee80211_if_sta *ifsta,
1111 struct ieee80211_mgmt *mgmt,
1119 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1122 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1124 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
1125 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1126 sdata->dev->name, reason_code);
1128 if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1129 ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
1130 ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1131 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1132 mod_timer(&ifsta->timer, jiffies +
1133 IEEE80211_RETRY_AUTH_INTERVAL);
1136 ieee80211_set_disassoc(sdata, ifsta, true, false, 0);
1137 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1141 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1142 struct ieee80211_if_sta *ifsta,
1143 struct ieee80211_mgmt *mgmt,
1151 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1154 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1156 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1157 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1158 sdata->dev->name, reason_code);
1160 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1161 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
1162 mod_timer(&ifsta->timer, jiffies +
1163 IEEE80211_RETRY_AUTH_INTERVAL);
1166 ieee80211_set_disassoc(sdata, ifsta, false, false, 0);
1170 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1171 struct ieee80211_if_sta *ifsta,
1172 struct ieee80211_mgmt *mgmt,
1176 struct ieee80211_local *local = sdata->local;
1177 struct ieee80211_supported_band *sband;
1178 struct sta_info *sta;
1179 u64 rates, basic_rates;
1180 u16 capab_info, status_code, aid;
1181 struct ieee802_11_elems elems;
1182 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1186 bool have_higher_than_11mbit = false, newsta = false;
1187 u16 ap_ht_cap_flags;
1189 /* AssocResp and ReassocResp have identical structure, so process both
1190 * of them in this function. */
1192 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
1198 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1201 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1202 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1203 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1205 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1206 "status=%d aid=%d)\n",
1207 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1208 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1210 if (status_code != WLAN_STATUS_SUCCESS) {
1211 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1212 sdata->dev->name, status_code);
1213 /* if this was a reassociation, ensure we try a "full"
1214 * association next time. This works around some broken APs
1215 * which do not correctly reject reassociation requests. */
1216 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1220 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1221 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1222 "set\n", sdata->dev->name, aid);
1223 aid &= ~(BIT(15) | BIT(14));
1225 pos = mgmt->u.assoc_resp.variable;
1226 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1228 if (!elems.supp_rates) {
1229 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1234 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1236 ifsta->ap_capab = capab_info;
1238 kfree(ifsta->assocresp_ies);
1239 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1240 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1241 if (ifsta->assocresp_ies)
1242 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1246 /* Add STA entry for the AP */
1247 sta = sta_info_get(local, ifsta->bssid);
1249 struct ieee80211_bss *bss;
1253 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1255 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1256 " the AP\n", sdata->dev->name);
1260 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
1261 local->hw.conf.channel->center_freq,
1262 ifsta->ssid, ifsta->ssid_len);
1264 sta->last_signal = bss->signal;
1265 sta->last_qual = bss->qual;
1266 sta->last_noise = bss->noise;
1267 ieee80211_rx_bss_put(local, bss);
1270 /* update new sta with its last rx activity */
1271 sta->last_rx = jiffies;
1275 * FIXME: Do we really need to update the sta_info's information here?
1276 * We already know about the AP (we found it in our list) so it
1277 * should already be filled with the right info, no?
1278 * As is stands, all this is racy because typically we assume
1279 * the information that is filled in here (except flags) doesn't
1280 * change while a STA structure is alive. As such, it should move
1281 * to between the sta_info_alloc() and sta_info_insert() above.
1284 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1285 WLAN_STA_AUTHORIZED);
1289 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1291 for (i = 0; i < elems.supp_rates_len; i++) {
1292 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1293 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1296 have_higher_than_11mbit = true;
1298 for (j = 0; j < sband->n_bitrates; j++) {
1299 if (sband->bitrates[j].bitrate == rate) {
1302 basic_rates |= BIT(j);
1308 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1309 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1310 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1313 have_higher_than_11mbit = true;
1315 for (j = 0; j < sband->n_bitrates; j++) {
1316 if (sband->bitrates[j].bitrate == rate) {
1319 basic_rates |= BIT(j);
1325 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1326 sdata->vif.bss_conf.basic_rates = basic_rates;
1328 /* cf. IEEE 802.11 9.2.12 */
1329 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1330 have_higher_than_11mbit)
1331 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1333 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1335 if (elems.ht_cap_elem)
1336 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1337 elems.ht_cap_elem, &sta->sta.ht_cap);
1339 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1341 rate_control_rate_init(sta);
1343 if (elems.wmm_param)
1344 set_sta_flags(sta, WLAN_STA_WME);
1347 int err = sta_info_insert(sta);
1349 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1350 " the AP (error %d)\n", sdata->dev->name, err);
1358 if (elems.wmm_param)
1359 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1360 elems.wmm_param_len);
1362 if (elems.ht_info_elem && elems.wmm_param &&
1363 (ifsta->flags & IEEE80211_STA_WMM_ENABLED))
1364 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1367 /* set AID and assoc capability,
1368 * ieee80211_set_associated() will tell the driver */
1369 bss_conf->aid = aid;
1370 bss_conf->assoc_capability = capab_info;
1371 ieee80211_set_associated(sdata, ifsta, changed);
1373 ieee80211_associated(sdata, ifsta);
1377 static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
1378 struct ieee80211_if_sta *ifsta,
1379 struct ieee80211_bss *bss)
1381 struct ieee80211_local *local = sdata->local;
1382 int res, rates, i, j;
1383 struct sk_buff *skb;
1384 struct ieee80211_mgmt *mgmt;
1386 struct ieee80211_supported_band *sband;
1387 union iwreq_data wrqu;
1389 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
1391 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1392 "response\n", sdata->dev->name);
1396 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1398 /* Remove possible STA entries from other IBSS networks. */
1399 sta_info_flush_delayed(sdata);
1401 if (local->ops->reset_tsf) {
1402 /* Reset own TSF to allow time synchronization work. */
1403 local->ops->reset_tsf(local_to_hw(local));
1405 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
1406 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
1410 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
1412 sdata->drop_unencrypted = bss->capability &
1413 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
1415 res = ieee80211_set_freq(sdata, bss->freq);
1420 /* Build IBSS probe response */
1422 skb_reserve(skb, local->hw.extra_tx_headroom);
1424 mgmt = (struct ieee80211_mgmt *)
1425 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
1426 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
1427 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1428 IEEE80211_STYPE_PROBE_RESP);
1429 memset(mgmt->da, 0xff, ETH_ALEN);
1430 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1431 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1432 mgmt->u.beacon.beacon_int =
1433 cpu_to_le16(local->hw.conf.beacon_int);
1434 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
1435 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
1437 pos = skb_put(skb, 2 + ifsta->ssid_len);
1438 *pos++ = WLAN_EID_SSID;
1439 *pos++ = ifsta->ssid_len;
1440 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
1442 rates = bss->supp_rates_len;
1445 pos = skb_put(skb, 2 + rates);
1446 *pos++ = WLAN_EID_SUPP_RATES;
1448 memcpy(pos, bss->supp_rates, rates);
1450 if (bss->band == IEEE80211_BAND_2GHZ) {
1451 pos = skb_put(skb, 2 + 1);
1452 *pos++ = WLAN_EID_DS_PARAMS;
1454 *pos++ = ieee80211_frequency_to_channel(bss->freq);
1457 pos = skb_put(skb, 2 + 2);
1458 *pos++ = WLAN_EID_IBSS_PARAMS;
1460 /* FIX: set ATIM window based on scan results */
1464 if (bss->supp_rates_len > 8) {
1465 rates = bss->supp_rates_len - 8;
1466 pos = skb_put(skb, 2 + rates);
1467 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1469 memcpy(pos, &bss->supp_rates[8], rates);
1472 ifsta->probe_resp = skb;
1474 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
1478 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1479 for (i = 0; i < bss->supp_rates_len; i++) {
1480 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
1481 for (j = 0; j < sband->n_bitrates; j++)
1482 if (sband->bitrates[j].bitrate == bitrate)
1485 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
1487 ieee80211_sta_def_wmm_params(sdata, bss);
1489 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
1490 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1492 ieee80211_led_assoc(local, true);
1494 memset(&wrqu, 0, sizeof(wrqu));
1495 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
1496 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
1501 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1502 struct ieee80211_mgmt *mgmt,
1504 struct ieee80211_rx_status *rx_status,
1505 struct ieee802_11_elems *elems,
1508 struct ieee80211_local *local = sdata->local;
1510 struct ieee80211_bss *bss;
1511 struct sta_info *sta;
1512 struct ieee80211_channel *channel;
1513 u64 beacon_timestamp, rx_timestamp;
1515 enum ieee80211_band band = rx_status->band;
1517 if (elems->ds_params && elems->ds_params_len == 1)
1518 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1520 freq = rx_status->freq;
1522 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1524 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1527 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && elems->supp_rates &&
1528 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1529 supp_rates = ieee80211_sta_get_rates(local, elems, band);
1533 sta = sta_info_get(local, mgmt->sa);
1537 prev_rates = sta->sta.supp_rates[band];
1538 /* make sure mandatory rates are always added */
1539 sta->sta.supp_rates[band] = supp_rates |
1540 ieee80211_mandatory_rates(local, band);
1542 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1543 if (sta->sta.supp_rates[band] != prev_rates)
1544 printk(KERN_DEBUG "%s: updated supp_rates set "
1545 "for %pM based on beacon info (0x%llx | "
1546 "0x%llx -> 0x%llx)\n",
1549 (unsigned long long) prev_rates,
1550 (unsigned long long) supp_rates,
1551 (unsigned long long) sta->sta.supp_rates[band]);
1554 ieee80211_ibss_add_sta(sdata, NULL, mgmt->bssid,
1555 mgmt->sa, supp_rates);
1561 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1566 /* was just updated in ieee80211_bss_info_update */
1567 beacon_timestamp = bss->timestamp;
1570 * In STA mode, the remaining parameters should not be overridden
1571 * by beacons because they're not necessarily accurate there.
1573 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
1574 bss->last_probe_resp && beacon) {
1575 ieee80211_rx_bss_put(local, bss);
1579 /* check if we need to merge IBSS */
1580 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && beacon &&
1581 bss->capability & WLAN_CAPABILITY_IBSS &&
1582 bss->freq == local->oper_channel->center_freq &&
1583 elems->ssid_len == sdata->u.sta.ssid_len &&
1584 memcmp(elems->ssid, sdata->u.sta.ssid,
1585 sdata->u.sta.ssid_len) == 0) {
1586 if (rx_status->flag & RX_FLAG_TSFT) {
1587 /* in order for correct IBSS merging we need mactime
1589 * since mactime is defined as the time the first data
1590 * symbol of the frame hits the PHY, and the timestamp
1591 * of the beacon is defined as "the time that the data
1592 * symbol containing the first bit of the timestamp is
1593 * transmitted to the PHY plus the transmitting STA’s
1594 * delays through its local PHY from the MAC-PHY
1595 * interface to its interface with the WM"
1596 * (802.11 11.1.2) - equals the time this bit arrives at
1597 * the receiver - we have to take into account the
1598 * offset between the two.
1599 * e.g: at 1 MBit that means mactime is 192 usec earlier
1600 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
1602 int rate = local->hw.wiphy->bands[band]->
1603 bitrates[rx_status->rate_idx].bitrate;
1604 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
1605 } else if (local && local->ops && local->ops->get_tsf)
1606 /* second best option: get current TSF */
1607 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
1609 /* can't merge without knowing the TSF */
1610 rx_timestamp = -1LLU;
1611 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1612 printk(KERN_DEBUG "RX beacon SA=%pM BSSID="
1613 "%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
1614 mgmt->sa, mgmt->bssid,
1615 (unsigned long long)rx_timestamp,
1616 (unsigned long long)beacon_timestamp,
1617 (unsigned long long)(rx_timestamp - beacon_timestamp),
1619 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1620 if (beacon_timestamp > rx_timestamp) {
1621 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1622 printk(KERN_DEBUG "%s: beacon TSF higher than "
1623 "local TSF - IBSS merge with BSSID %pM\n",
1624 sdata->dev->name, mgmt->bssid);
1626 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
1627 ieee80211_ibss_add_sta(sdata, NULL,
1628 mgmt->bssid, mgmt->sa,
1633 ieee80211_rx_bss_put(local, bss);
1637 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1638 struct ieee80211_mgmt *mgmt,
1640 struct ieee80211_rx_status *rx_status)
1643 struct ieee802_11_elems elems;
1644 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1646 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1647 return; /* ignore ProbeResp to foreign address */
1649 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1653 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1656 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1658 /* direct probe may be part of the association flow */
1659 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1661 printk(KERN_DEBUG "%s direct probe responded\n",
1663 ieee80211_authenticate(sdata, ifsta);
1668 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1669 struct ieee80211_mgmt *mgmt,
1671 struct ieee80211_rx_status *rx_status)
1673 struct ieee80211_if_sta *ifsta;
1675 struct ieee802_11_elems elems;
1676 struct ieee80211_local *local = sdata->local;
1681 /* Process beacon from the current BSS */
1682 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1686 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1688 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
1690 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1692 ifsta = &sdata->u.sta;
1694 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
1695 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1698 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1699 elems.wmm_param_len);
1702 if (elems.erp_info && elems.erp_info_len >= 1) {
1704 erp_value = elems.erp_info[0];
1708 changed |= ieee80211_handle_bss_capability(sdata,
1709 le16_to_cpu(mgmt->u.beacon.capab_info),
1710 erp_valid, erp_value);
1713 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param) {
1714 struct sta_info *sta;
1715 struct ieee80211_supported_band *sband;
1716 u16 ap_ht_cap_flags;
1720 sta = sta_info_get(local, ifsta->bssid);
1726 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1728 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1729 elems.ht_cap_elem, &sta->sta.ht_cap);
1731 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1735 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1739 ieee80211_bss_info_change_notify(sdata, changed);
1743 static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
1744 struct ieee80211_if_sta *ifsta,
1745 struct ieee80211_mgmt *mgmt,
1747 struct ieee80211_rx_status *rx_status)
1749 struct ieee80211_local *local = sdata->local;
1751 struct sk_buff *skb;
1752 struct ieee80211_mgmt *resp;
1755 if (sdata->vif.type != NL80211_IFTYPE_ADHOC ||
1756 ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
1757 len < 24 + 2 || !ifsta->probe_resp)
1760 if (local->ops->tx_last_beacon)
1761 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1765 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1766 printk(KERN_DEBUG "%s: RX ProbeReq SA=%pM DA=%pM BSSID=%pM"
1767 " (tx_last_beacon=%d)\n",
1768 sdata->dev->name, mgmt->sa, mgmt->da,
1769 mgmt->bssid, tx_last_beacon);
1770 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1772 if (!tx_last_beacon)
1775 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1776 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1779 end = ((u8 *) mgmt) + len;
1780 pos = mgmt->u.probe_req.variable;
1781 if (pos[0] != WLAN_EID_SSID ||
1782 pos + 2 + pos[1] > end) {
1783 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1784 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
1786 sdata->dev->name, mgmt->sa);
1791 (pos[1] != ifsta->ssid_len ||
1792 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1793 /* Ignore ProbeReq for foreign SSID */
1797 /* Reply with ProbeResp */
1798 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
1802 resp = (struct ieee80211_mgmt *) skb->data;
1803 memcpy(resp->da, mgmt->sa, ETH_ALEN);
1804 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1805 printk(KERN_DEBUG "%s: Sending ProbeResp to %pM\n",
1806 sdata->dev->name, resp->da);
1807 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1808 ieee80211_tx_skb(sdata, skb, 0);
1811 void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
1812 struct ieee80211_rx_status *rx_status)
1814 struct ieee80211_local *local = sdata->local;
1815 struct ieee80211_if_sta *ifsta;
1816 struct ieee80211_mgmt *mgmt;
1822 ifsta = &sdata->u.sta;
1824 mgmt = (struct ieee80211_mgmt *) skb->data;
1825 fc = le16_to_cpu(mgmt->frame_control);
1827 switch (fc & IEEE80211_FCTL_STYPE) {
1828 case IEEE80211_STYPE_PROBE_REQ:
1829 case IEEE80211_STYPE_PROBE_RESP:
1830 case IEEE80211_STYPE_BEACON:
1831 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1832 case IEEE80211_STYPE_AUTH:
1833 case IEEE80211_STYPE_ASSOC_RESP:
1834 case IEEE80211_STYPE_REASSOC_RESP:
1835 case IEEE80211_STYPE_DEAUTH:
1836 case IEEE80211_STYPE_DISASSOC:
1837 skb_queue_tail(&ifsta->skb_queue, skb);
1838 queue_work(local->hw.workqueue, &ifsta->work);
1846 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1847 struct sk_buff *skb)
1849 struct ieee80211_rx_status *rx_status;
1850 struct ieee80211_if_sta *ifsta;
1851 struct ieee80211_mgmt *mgmt;
1854 ifsta = &sdata->u.sta;
1856 rx_status = (struct ieee80211_rx_status *) skb->cb;
1857 mgmt = (struct ieee80211_mgmt *) skb->data;
1858 fc = le16_to_cpu(mgmt->frame_control);
1860 switch (fc & IEEE80211_FCTL_STYPE) {
1861 case IEEE80211_STYPE_PROBE_REQ:
1862 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len,
1865 case IEEE80211_STYPE_PROBE_RESP:
1866 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
1868 case IEEE80211_STYPE_BEACON:
1869 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
1871 case IEEE80211_STYPE_AUTH:
1872 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
1874 case IEEE80211_STYPE_ASSOC_RESP:
1875 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
1877 case IEEE80211_STYPE_REASSOC_RESP:
1878 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
1880 case IEEE80211_STYPE_DEAUTH:
1881 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
1883 case IEEE80211_STYPE_DISASSOC:
1884 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
1892 static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
1894 struct ieee80211_local *local = sdata->local;
1896 struct sta_info *sta;
1900 list_for_each_entry_rcu(sta, &local->sta_list, list) {
1901 if (sta->sdata == sdata &&
1902 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
1915 static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
1916 struct ieee80211_if_sta *ifsta)
1918 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1920 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
1921 if (ieee80211_sta_active_ibss(sdata))
1924 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
1925 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
1926 ieee80211_request_scan(sdata, ifsta->ssid, ifsta->ssid_len);
1930 static void ieee80211_sta_timer(unsigned long data)
1932 struct ieee80211_sub_if_data *sdata =
1933 (struct ieee80211_sub_if_data *) data;
1934 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1935 struct ieee80211_local *local = sdata->local;
1937 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1938 queue_work(local->hw.workqueue, &ifsta->work);
1941 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
1942 struct ieee80211_if_sta *ifsta)
1944 struct ieee80211_local *local = sdata->local;
1946 if (local->ops->reset_tsf) {
1947 /* Reset own TSF to allow time synchronization work. */
1948 local->ops->reset_tsf(local_to_hw(local));
1951 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
1954 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1955 ifsta->auth_alg = WLAN_AUTH_OPEN;
1956 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1957 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
1958 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1959 ifsta->auth_alg = WLAN_AUTH_LEAP;
1961 ifsta->auth_alg = WLAN_AUTH_OPEN;
1962 ifsta->auth_transaction = -1;
1963 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
1964 ifsta->assoc_scan_tries = 0;
1965 ifsta->direct_probe_tries = 0;
1966 ifsta->auth_tries = 0;
1967 ifsta->assoc_tries = 0;
1968 netif_tx_stop_all_queues(sdata->dev);
1969 netif_carrier_off(sdata->dev);
1973 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
1974 const char *ssid, int ssid_len)
1976 int tmp, hidden_ssid;
1978 if (ssid_len == ifsta->ssid_len &&
1979 !memcmp(ifsta->ssid, ssid, ssid_len))
1982 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
1988 if (ssid[tmp] != '\0') {
1994 if (hidden_ssid && ifsta->ssid_len == ssid_len)
1997 if (ssid_len == 1 && ssid[0] == ' ')
2003 static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
2004 struct ieee80211_if_sta *ifsta)
2006 struct ieee80211_local *local = sdata->local;
2007 struct ieee80211_bss *bss;
2008 struct ieee80211_supported_band *sband;
2009 u8 bssid[ETH_ALEN], *pos;
2014 /* Easier testing, use fixed BSSID. */
2015 memset(bssid, 0xfe, ETH_ALEN);
2017 /* Generate random, not broadcast, locally administered BSSID. Mix in
2018 * own MAC address to make sure that devices that do not have proper
2019 * random number generator get different BSSID. */
2020 get_random_bytes(bssid, ETH_ALEN);
2021 for (i = 0; i < ETH_ALEN; i++)
2022 bssid[i] ^= sdata->dev->dev_addr[i];
2027 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %pM\n",
2028 sdata->dev->name, bssid);
2030 bss = ieee80211_rx_bss_add(local, bssid,
2031 local->hw.conf.channel->center_freq,
2032 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
2036 bss->band = local->hw.conf.channel->band;
2037 sband = local->hw.wiphy->bands[bss->band];
2039 if (local->hw.conf.beacon_int == 0)
2040 local->hw.conf.beacon_int = 100;
2041 bss->beacon_int = local->hw.conf.beacon_int;
2042 bss->last_update = jiffies;
2043 bss->capability = WLAN_CAPABILITY_IBSS;
2045 if (sdata->default_key)
2046 bss->capability |= WLAN_CAPABILITY_PRIVACY;
2048 sdata->drop_unencrypted = 0;
2050 bss->supp_rates_len = sband->n_bitrates;
2051 pos = bss->supp_rates;
2052 for (i = 0; i < sband->n_bitrates; i++) {
2053 int rate = sband->bitrates[i].bitrate;
2054 *pos++ = (u8) (rate / 5);
2057 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
2058 ieee80211_rx_bss_put(local, bss);
2063 static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
2064 struct ieee80211_if_sta *ifsta)
2066 struct ieee80211_local *local = sdata->local;
2067 struct ieee80211_bss *bss;
2072 if (ifsta->ssid_len == 0)
2075 active_ibss = ieee80211_sta_active_ibss(sdata);
2076 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2077 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2078 sdata->dev->name, active_ibss);
2079 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2080 spin_lock_bh(&local->bss_lock);
2081 list_for_each_entry(bss, &local->bss_list, list) {
2082 if (ifsta->ssid_len != bss->ssid_len ||
2083 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2084 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2086 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2087 printk(KERN_DEBUG " bssid=%pM found\n", bss->bssid);
2088 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2089 memcpy(bssid, bss->bssid, ETH_ALEN);
2091 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2094 spin_unlock_bh(&local->bss_lock);
2096 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2098 printk(KERN_DEBUG " sta_find_ibss: selected %pM current "
2099 "%pM\n", bssid, ifsta->bssid);
2100 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2102 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2106 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2107 search_freq = bss->freq;
2109 search_freq = local->hw.conf.channel->center_freq;
2111 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
2112 ifsta->ssid, ifsta->ssid_len);
2116 printk(KERN_DEBUG "%s: Selected IBSS BSSID %pM"
2117 " based on configured SSID\n",
2118 sdata->dev->name, bssid);
2119 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
2120 ieee80211_rx_bss_put(local, bss);
2125 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2126 printk(KERN_DEBUG " did not try to join ibss\n");
2127 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2129 /* Selected IBSS not found in current scan results - try to scan */
2130 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
2131 !ieee80211_sta_active_ibss(sdata)) {
2132 mod_timer(&ifsta->timer, jiffies +
2133 IEEE80211_IBSS_MERGE_INTERVAL);
2134 } else if (time_after(jiffies, local->last_scan_completed +
2135 IEEE80211_SCAN_INTERVAL)) {
2136 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
2137 "join\n", sdata->dev->name);
2138 return ieee80211_request_scan(sdata, ifsta->ssid,
2140 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
2141 int interval = IEEE80211_SCAN_INTERVAL;
2143 if (time_after(jiffies, ifsta->ibss_join_req +
2144 IEEE80211_IBSS_JOIN_TIMEOUT)) {
2145 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
2146 (!(local->oper_channel->flags &
2147 IEEE80211_CHAN_NO_IBSS)))
2148 return ieee80211_sta_create_ibss(sdata, ifsta);
2149 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
2150 printk(KERN_DEBUG "%s: IBSS not allowed on"
2151 " %d MHz\n", sdata->dev->name,
2152 local->hw.conf.channel->center_freq);
2155 /* No IBSS found - decrease scan interval and continue
2157 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2160 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2161 mod_timer(&ifsta->timer, jiffies + interval);
2169 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
2170 struct ieee80211_if_sta *ifsta)
2172 struct ieee80211_local *local = sdata->local;
2173 struct ieee80211_bss *bss, *selected = NULL;
2174 int top_rssi = 0, freq;
2176 spin_lock_bh(&local->bss_lock);
2177 freq = local->oper_channel->center_freq;
2178 list_for_each_entry(bss, &local->bss_list, list) {
2179 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2182 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2183 IEEE80211_STA_AUTO_BSSID_SEL |
2184 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
2185 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2186 !!sdata->default_key))
2189 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2193 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2194 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2197 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2198 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2201 if (!selected || top_rssi < bss->signal) {
2203 top_rssi = bss->signal;
2207 atomic_inc(&selected->users);
2208 spin_unlock_bh(&local->bss_lock);
2211 ieee80211_set_freq(sdata, selected->freq);
2212 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2213 ieee80211_sta_set_ssid(sdata, selected->ssid,
2214 selected->ssid_len);
2215 ieee80211_sta_set_bssid(sdata, selected->bssid);
2216 ieee80211_sta_def_wmm_params(sdata, selected);
2218 /* Send out direct probe if no probe resp was received or
2219 * the one we have is outdated
2221 if (!selected->last_probe_resp ||
2222 time_after(jiffies, selected->last_probe_resp
2223 + IEEE80211_SCAN_RESULT_EXPIRE))
2224 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2226 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2228 ieee80211_rx_bss_put(local, selected);
2229 ieee80211_sta_reset_auth(sdata, ifsta);
2232 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2233 ifsta->assoc_scan_tries++;
2234 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
2235 ieee80211_start_scan(sdata, NULL, 0);
2237 ieee80211_start_scan(sdata, ifsta->ssid,
2239 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2240 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2242 ifsta->state = IEEE80211_STA_MLME_DISABLED;
2248 static void ieee80211_sta_work(struct work_struct *work)
2250 struct ieee80211_sub_if_data *sdata =
2251 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2252 struct ieee80211_local *local = sdata->local;
2253 struct ieee80211_if_sta *ifsta;
2254 struct sk_buff *skb;
2256 if (!netif_running(sdata->dev))
2259 if (local->sw_scanning || local->hw_scanning)
2262 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION &&
2263 sdata->vif.type != NL80211_IFTYPE_ADHOC))
2265 ifsta = &sdata->u.sta;
2267 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2268 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2270 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2271 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2272 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
2273 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
2274 ieee80211_start_scan(sdata, ifsta->scan_ssid,
2275 ifsta->scan_ssid_len);
2279 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2280 if (ieee80211_sta_config_auth(sdata, ifsta))
2282 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2283 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2286 switch (ifsta->state) {
2287 case IEEE80211_STA_MLME_DISABLED:
2289 case IEEE80211_STA_MLME_DIRECT_PROBE:
2290 ieee80211_direct_probe(sdata, ifsta);
2292 case IEEE80211_STA_MLME_AUTHENTICATE:
2293 ieee80211_authenticate(sdata, ifsta);
2295 case IEEE80211_STA_MLME_ASSOCIATE:
2296 ieee80211_associate(sdata, ifsta);
2298 case IEEE80211_STA_MLME_ASSOCIATED:
2299 ieee80211_associated(sdata, ifsta);
2301 case IEEE80211_STA_MLME_IBSS_SEARCH:
2302 ieee80211_sta_find_ibss(sdata, ifsta);
2304 case IEEE80211_STA_MLME_IBSS_JOINED:
2305 ieee80211_sta_merge_ibss(sdata, ifsta);
2312 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
2313 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2314 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2316 ieee80211_set_disassoc(sdata, ifsta, false, true,
2317 WLAN_REASON_UNSPECIFIED);
2321 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2323 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2324 queue_work(sdata->local->hw.workqueue,
2325 &sdata->u.sta.work);
2328 /* interface setup */
2329 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2331 struct ieee80211_if_sta *ifsta;
2333 ifsta = &sdata->u.sta;
2334 INIT_WORK(&ifsta->work, ieee80211_sta_work);
2335 setup_timer(&ifsta->timer, ieee80211_sta_timer,
2336 (unsigned long) sdata);
2337 skb_queue_head_init(&ifsta->skb_queue);
2339 ifsta->capab = WLAN_CAPABILITY_ESS;
2340 ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2341 IEEE80211_AUTH_ALG_SHARED_KEY;
2342 ifsta->flags |= IEEE80211_STA_CREATE_IBSS |
2343 IEEE80211_STA_AUTO_BSSID_SEL |
2344 IEEE80211_STA_AUTO_CHANNEL_SEL;
2345 if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4)
2346 ifsta->flags |= IEEE80211_STA_WMM_ENABLED;
2350 * Add a new IBSS station, will also be called by the RX code when,
2351 * in IBSS mode, receiving a frame from a yet-unknown station, hence
2352 * must be callable in atomic context.
2354 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
2355 struct sk_buff *skb, u8 *bssid,
2356 u8 *addr, u64 supp_rates)
2358 struct ieee80211_local *local = sdata->local;
2359 struct sta_info *sta;
2360 int band = local->hw.conf.channel->band;
2362 /* TODO: Could consider removing the least recently used entry and
2363 * allow new one to be added. */
2364 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
2365 if (net_ratelimit()) {
2366 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
2367 "entry %pM\n", sdata->dev->name, addr);
2372 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
2375 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2376 printk(KERN_DEBUG "%s: Adding new IBSS station %pM (dev=%s)\n",
2377 wiphy_name(local->hw.wiphy), addr, sdata->dev->name);
2380 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
2384 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
2386 /* make sure mandatory rates are always added */
2387 sta->sta.supp_rates[band] = supp_rates |
2388 ieee80211_mandatory_rates(local, band);
2390 rate_control_rate_init(sta);
2392 if (sta_info_insert(sta))
2398 /* configuration hooks */
2399 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
2400 struct ieee80211_if_sta *ifsta)
2402 struct ieee80211_local *local = sdata->local;
2404 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2407 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2408 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2409 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2410 IEEE80211_STA_AUTO_SSID_SEL))) {
2412 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED)
2413 ieee80211_set_disassoc(sdata, ifsta, true, true,
2414 WLAN_REASON_DEAUTH_LEAVING);
2416 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2417 queue_work(local->hw.workqueue, &ifsta->work);
2421 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2423 struct ieee80211_if_sta *ifsta;
2425 if (len > IEEE80211_MAX_SSID_LEN)
2428 ifsta = &sdata->u.sta;
2430 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
2431 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
2432 memcpy(ifsta->ssid, ssid, len);
2433 ifsta->ssid_len = len;
2434 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2438 ifsta->flags |= IEEE80211_STA_SSID_SET;
2440 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
2442 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
2443 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
2444 ifsta->ibss_join_req = jiffies;
2445 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2446 return ieee80211_sta_find_ibss(sdata, ifsta);
2452 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2454 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2455 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2456 *len = ifsta->ssid_len;
2460 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2462 struct ieee80211_if_sta *ifsta;
2465 ifsta = &sdata->u.sta;
2467 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2468 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2471 * Hack! See also ieee80211_sta_set_ssid.
2473 if (netif_running(sdata->dev))
2474 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
2476 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2477 "the low-level driver\n", sdata->dev->name);
2482 if (is_valid_ether_addr(bssid))
2483 ifsta->flags |= IEEE80211_STA_BSSID_SET;
2485 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
2490 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
2492 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2494 kfree(ifsta->extra_ie);
2496 ifsta->extra_ie = NULL;
2497 ifsta->extra_ie_len = 0;
2500 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
2501 if (!ifsta->extra_ie) {
2502 ifsta->extra_ie_len = 0;
2505 memcpy(ifsta->extra_ie, ie, len);
2506 ifsta->extra_ie_len = len;
2510 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2512 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2514 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2515 sdata->dev->name, reason);
2517 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
2518 sdata->vif.type != NL80211_IFTYPE_ADHOC)
2521 ieee80211_set_disassoc(sdata, ifsta, true, true, reason);
2525 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2527 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2529 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2530 sdata->dev->name, reason);
2532 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2535 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
2538 ieee80211_set_disassoc(sdata, ifsta, false, true, reason);
2542 /* scan finished notification */
2543 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2545 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2546 struct ieee80211_if_sta *ifsta;
2548 if (sdata && sdata->vif.type == NL80211_IFTYPE_ADHOC) {
2549 ifsta = &sdata->u.sta;
2550 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
2551 (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) &&
2552 !ieee80211_sta_active_ibss(sdata)))
2553 ieee80211_sta_find_ibss(sdata, ifsta);
2556 /* Restart STA timers */
2558 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2559 ieee80211_restart_sta_timer(sdata);