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/netdevice.h>
18 #include <linux/if_arp.h>
19 #include <linux/wireless.h>
20 #include <linux/random.h>
21 #include <linux/etherdevice.h>
22 #include <linux/rtnetlink.h>
23 #include <net/iw_handler.h>
24 #include <net/mac80211.h>
25 #include <asm/unaligned.h>
27 #include "ieee80211_i.h"
31 #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
32 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
33 #define IEEE80211_AUTH_MAX_TRIES 3
34 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
35 #define IEEE80211_ASSOC_MAX_TRIES 3
36 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
37 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
38 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
39 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
40 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
41 #define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
43 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
44 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
46 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
50 static int ecw2cw(int ecw)
52 return (1 << ecw) - 1;
55 static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
62 end = pos + bss->ies_len;
64 while (pos + 1 < end) {
65 if (pos + 2 + pos[1] > end)
75 static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
76 struct ieee80211_supported_band *sband,
82 for (i = 0; i < bss->supp_rates_len; i++) {
83 int rate = (bss->supp_rates[i] & 0x7F) * 5;
85 for (j = 0; j < sband->n_bitrates; j++)
86 if (sband->bitrates[j].bitrate == rate) {
96 /* also used by mesh code */
97 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
98 struct ieee802_11_elems *elems,
99 enum ieee80211_band band)
101 struct ieee80211_supported_band *sband;
102 struct ieee80211_rate *bitrates;
106 sband = local->hw.wiphy->bands[band];
110 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
113 bitrates = sband->bitrates;
114 num_rates = sband->n_bitrates;
116 for (i = 0; i < elems->supp_rates_len +
117 elems->ext_supp_rates_len; i++) {
120 if (i < elems->supp_rates_len)
121 rate = elems->supp_rates[i];
122 else if (elems->ext_supp_rates)
123 rate = elems->ext_supp_rates
124 [i - elems->supp_rates_len];
125 own_rate = 5 * (rate & 0x7f);
126 for (j = 0; j < num_rates; j++)
127 if (bitrates[j].bitrate == own_rate)
128 supp_rates |= BIT(j);
133 /* frame sending functions */
135 /* also used by scanning code */
136 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
137 u8 *ssid, size_t ssid_len)
139 struct ieee80211_local *local = sdata->local;
140 struct ieee80211_supported_band *sband;
142 struct ieee80211_mgmt *mgmt;
143 u8 *pos, *supp_rates, *esupp_rates = NULL;
146 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
148 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
149 "request\n", sdata->dev->name);
152 skb_reserve(skb, local->hw.extra_tx_headroom);
154 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
156 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
157 IEEE80211_STYPE_PROBE_REQ);
158 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
160 memcpy(mgmt->da, dst, ETH_ALEN);
161 memcpy(mgmt->bssid, dst, ETH_ALEN);
163 memset(mgmt->da, 0xff, ETH_ALEN);
164 memset(mgmt->bssid, 0xff, ETH_ALEN);
166 pos = skb_put(skb, 2 + ssid_len);
167 *pos++ = WLAN_EID_SSID;
169 memcpy(pos, ssid, ssid_len);
171 supp_rates = skb_put(skb, 2);
172 supp_rates[0] = WLAN_EID_SUPP_RATES;
174 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
176 for (i = 0; i < sband->n_bitrates; i++) {
177 struct ieee80211_rate *rate = &sband->bitrates[i];
179 pos = skb_put(skb, 1);
181 } else if (supp_rates[1] == 8) {
182 esupp_rates = skb_put(skb, 3);
183 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
185 pos = &esupp_rates[2];
187 pos = skb_put(skb, 1);
190 *pos = rate->bitrate / 5;
193 ieee80211_tx_skb(sdata, skb, 0);
196 static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
197 struct ieee80211_if_sta *ifsta,
198 int transaction, u8 *extra, size_t extra_len,
201 struct ieee80211_local *local = sdata->local;
203 struct ieee80211_mgmt *mgmt;
205 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
206 sizeof(*mgmt) + 6 + extra_len);
208 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
209 "frame\n", sdata->dev->name);
212 skb_reserve(skb, local->hw.extra_tx_headroom);
214 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
215 memset(mgmt, 0, 24 + 6);
216 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
217 IEEE80211_STYPE_AUTH);
219 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
220 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
221 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
222 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
223 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
224 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
225 ifsta->auth_transaction = transaction + 1;
226 mgmt->u.auth.status_code = cpu_to_le16(0);
228 memcpy(skb_put(skb, extra_len), extra, extra_len);
230 ieee80211_tx_skb(sdata, skb, encrypt);
233 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
234 struct ieee80211_if_sta *ifsta)
236 struct ieee80211_local *local = sdata->local;
238 struct ieee80211_mgmt *mgmt;
239 u8 *pos, *ies, *ht_ie;
240 int i, len, count, rates_len, supp_rates_len;
242 struct ieee80211_bss *bss;
244 struct ieee80211_supported_band *sband;
247 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
248 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
251 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
252 "frame\n", sdata->dev->name);
255 skb_reserve(skb, local->hw.extra_tx_headroom);
257 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
259 capab = ifsta->capab;
261 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
262 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
263 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
264 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
265 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
268 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
269 local->hw.conf.channel->center_freq,
270 ifsta->ssid, ifsta->ssid_len);
272 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
273 capab |= WLAN_CAPABILITY_PRIVACY;
277 /* get all rates supported by the device and the AP as
278 * some APs don't like getting a superset of their rates
279 * in the association request (e.g. D-Link DAP 1353 in
281 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
283 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
284 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
285 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
287 ieee80211_rx_bss_put(local, bss);
290 rates_len = sband->n_bitrates;
293 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
295 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
296 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
297 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
299 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
301 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
302 IEEE80211_STYPE_REASSOC_REQ);
303 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
304 mgmt->u.reassoc_req.listen_interval =
305 cpu_to_le16(local->hw.conf.listen_interval);
306 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
310 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
311 IEEE80211_STYPE_ASSOC_REQ);
312 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
313 mgmt->u.reassoc_req.listen_interval =
314 cpu_to_le16(local->hw.conf.listen_interval);
318 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
319 *pos++ = WLAN_EID_SSID;
320 *pos++ = ifsta->ssid_len;
321 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
323 /* add all rates which were marked to be used above */
324 supp_rates_len = rates_len;
325 if (supp_rates_len > 8)
328 len = sband->n_bitrates;
329 pos = skb_put(skb, supp_rates_len + 2);
330 *pos++ = WLAN_EID_SUPP_RATES;
331 *pos++ = supp_rates_len;
334 for (i = 0; i < sband->n_bitrates; i++) {
335 if (BIT(i) & rates) {
336 int rate = sband->bitrates[i].bitrate;
337 *pos++ = (u8) (rate / 5);
343 if (rates_len > count) {
344 pos = skb_put(skb, rates_len - count + 2);
345 *pos++ = WLAN_EID_EXT_SUPP_RATES;
346 *pos++ = rates_len - count;
348 for (i++; i < sband->n_bitrates; i++) {
349 if (BIT(i) & rates) {
350 int rate = sband->bitrates[i].bitrate;
351 *pos++ = (u8) (rate / 5);
356 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
357 /* 1. power capabilities */
358 pos = skb_put(skb, 4);
359 *pos++ = WLAN_EID_PWR_CAPABILITY;
361 *pos++ = 0; /* min tx power */
362 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
364 /* 2. supported channels */
365 /* TODO: get this in reg domain format */
366 pos = skb_put(skb, 2 * sband->n_channels + 2);
367 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
368 *pos++ = 2 * sband->n_channels;
369 for (i = 0; i < sband->n_channels; i++) {
370 *pos++ = ieee80211_frequency_to_channel(
371 sband->channels[i].center_freq);
372 *pos++ = 1; /* one channel in the subband*/
376 if (ifsta->extra_ie) {
377 pos = skb_put(skb, ifsta->extra_ie_len);
378 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
381 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
382 pos = skb_put(skb, 9);
383 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
384 *pos++ = 7; /* len */
385 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
388 *pos++ = 2; /* WME */
389 *pos++ = 0; /* WME info */
390 *pos++ = 1; /* WME ver */
394 /* wmm support is a must to HT */
395 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
396 sband->ht_cap.ht_supported &&
397 (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) &&
398 ht_ie[1] >= sizeof(struct ieee80211_ht_info)) {
399 struct ieee80211_ht_info *ht_info =
400 (struct ieee80211_ht_info *)(ht_ie + 2);
401 u16 cap = sband->ht_cap.cap;
403 u32 flags = local->hw.conf.channel->flags;
405 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
406 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
407 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
408 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
409 cap &= ~IEEE80211_HT_CAP_SGI_40;
412 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
413 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
414 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
415 cap &= ~IEEE80211_HT_CAP_SGI_40;
420 tmp = cpu_to_le16(cap);
421 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
422 *pos++ = WLAN_EID_HT_CAPABILITY;
423 *pos++ = sizeof(struct ieee80211_ht_cap);
424 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
425 memcpy(pos, &tmp, sizeof(u16));
427 /* TODO: needs a define here for << 2 */
428 *pos++ = sband->ht_cap.ampdu_factor |
429 (sband->ht_cap.ampdu_density << 2);
430 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
433 kfree(ifsta->assocreq_ies);
434 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
435 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
436 if (ifsta->assocreq_ies)
437 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
439 ieee80211_tx_skb(sdata, skb, 0);
443 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
444 u16 stype, u16 reason)
446 struct ieee80211_local *local = sdata->local;
447 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
449 struct ieee80211_mgmt *mgmt;
451 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
453 printk(KERN_DEBUG "%s: failed to allocate buffer for "
454 "deauth/disassoc frame\n", sdata->dev->name);
457 skb_reserve(skb, local->hw.extra_tx_headroom);
459 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
461 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
462 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
463 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
464 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
466 /* u.deauth.reason_code == u.disassoc.reason_code */
467 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
469 ieee80211_tx_skb(sdata, skb, 0);
473 static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
474 struct ieee80211_bss *bss)
476 struct ieee80211_local *local = sdata->local;
477 int i, have_higher_than_11mbit = 0;
479 /* cf. IEEE 802.11 9.2.12 */
480 for (i = 0; i < bss->supp_rates_len; i++)
481 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
482 have_higher_than_11mbit = 1;
484 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
485 have_higher_than_11mbit)
486 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
488 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
490 ieee80211_set_wmm_default(sdata);
493 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
494 struct ieee80211_if_sta *ifsta,
495 u8 *wmm_param, size_t wmm_param_len)
497 struct ieee80211_tx_queue_params params;
502 if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
508 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
510 count = wmm_param[6] & 0x0f;
511 if (count == ifsta->wmm_last_param_set)
513 ifsta->wmm_last_param_set = count;
516 left = wmm_param_len - 8;
518 memset(¶ms, 0, sizeof(params));
520 if (!local->ops->conf_tx)
524 for (; left >= 4; left -= 4, pos += 4) {
525 int aci = (pos[0] >> 5) & 0x03;
526 int acm = (pos[0] >> 4) & 0x01;
533 local->wmm_acm |= BIT(0) | BIT(3);
538 local->wmm_acm |= BIT(4) | BIT(5);
543 local->wmm_acm |= BIT(6) | BIT(7);
549 local->wmm_acm |= BIT(1) | BIT(2);
553 params.aifs = pos[0] & 0x0f;
554 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
555 params.cw_min = ecw2cw(pos[1] & 0x0f);
556 params.txop = get_unaligned_le16(pos + 2);
557 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
558 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
559 "cWmin=%d cWmax=%d txop=%d\n",
560 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
561 params.cw_max, params.txop);
563 /* TODO: handle ACM (block TX, fallback to next lowest allowed
565 if (local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) {
566 printk(KERN_DEBUG "%s: failed to set TX queue "
567 "parameters for queue %d\n", local->mdev->name, queue);
572 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
573 u16 capab, bool erp_valid, u8 erp)
575 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
576 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
577 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
581 bool use_short_preamble;
585 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
586 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
588 use_protection = false;
589 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
592 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
594 if (use_protection != bss_conf->use_cts_prot) {
595 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
596 if (net_ratelimit()) {
597 printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
599 use_protection ? "enabled" : "disabled",
603 bss_conf->use_cts_prot = use_protection;
604 changed |= BSS_CHANGED_ERP_CTS_PROT;
607 if (use_short_preamble != bss_conf->use_short_preamble) {
608 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
609 if (net_ratelimit()) {
610 printk(KERN_DEBUG "%s: switched to %s barker preamble"
613 use_short_preamble ? "short" : "long",
617 bss_conf->use_short_preamble = use_short_preamble;
618 changed |= BSS_CHANGED_ERP_PREAMBLE;
621 if (use_short_slot != bss_conf->use_short_slot) {
622 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
623 if (net_ratelimit()) {
624 printk(KERN_DEBUG "%s: switched to %s slot"
627 use_short_slot ? "short" : "long",
631 bss_conf->use_short_slot = use_short_slot;
632 changed |= BSS_CHANGED_ERP_SLOT;
638 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata,
639 struct ieee80211_if_sta *ifsta)
641 union iwreq_data wrqu;
642 memset(&wrqu, 0, sizeof(wrqu));
643 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
644 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
645 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
646 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
649 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata,
650 struct ieee80211_if_sta *ifsta)
655 union iwreq_data wrqu;
657 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
660 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
661 ifsta->assocresp_ies_len), GFP_KERNEL);
665 len = sprintf(buf, "ASSOCINFO(");
666 if (ifsta->assocreq_ies) {
667 len += sprintf(buf + len, "ReqIEs=");
668 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
669 len += sprintf(buf + len, "%02x",
670 ifsta->assocreq_ies[i]);
673 if (ifsta->assocresp_ies) {
674 if (ifsta->assocreq_ies)
675 len += sprintf(buf + len, " ");
676 len += sprintf(buf + len, "RespIEs=");
677 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
678 len += sprintf(buf + len, "%02x",
679 ifsta->assocresp_ies[i]);
682 len += sprintf(buf + len, ")");
684 if (len > IW_CUSTOM_MAX) {
685 len = sprintf(buf, "ASSOCRESPIE=");
686 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
687 len += sprintf(buf + len, "%02x",
688 ifsta->assocresp_ies[i]);
692 if (len <= IW_CUSTOM_MAX) {
693 memset(&wrqu, 0, sizeof(wrqu));
694 wrqu.data.length = len;
695 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
702 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
703 struct ieee80211_if_sta *ifsta,
704 u32 bss_info_changed)
706 struct ieee80211_local *local = sdata->local;
707 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
709 struct ieee80211_bss *bss;
711 bss_info_changed |= BSS_CHANGED_ASSOC;
712 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
714 if (sdata->vif.type != NL80211_IFTYPE_STATION)
717 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
718 conf->channel->center_freq,
719 ifsta->ssid, ifsta->ssid_len);
721 /* set timing information */
722 sdata->vif.bss_conf.beacon_int = bss->beacon_int;
723 sdata->vif.bss_conf.timestamp = bss->timestamp;
724 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
726 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
727 bss->capability, bss->has_erp_value, bss->erp_value);
729 ieee80211_rx_bss_put(local, bss);
732 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
733 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
734 ieee80211_sta_send_associnfo(sdata, ifsta);
736 ifsta->last_probe = jiffies;
737 ieee80211_led_assoc(local, 1);
739 sdata->vif.bss_conf.assoc = 1;
741 * For now just always ask the driver to update the basic rateset
742 * when we have associated, we aren't checking whether it actually
745 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
746 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
748 netif_tx_start_all_queues(sdata->dev);
749 netif_carrier_on(sdata->dev);
751 ieee80211_sta_send_apinfo(sdata, ifsta);
754 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
755 struct ieee80211_if_sta *ifsta)
757 ifsta->direct_probe_tries++;
758 if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
759 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
760 sdata->dev->name, ifsta->bssid);
761 ifsta->state = IEEE80211_STA_MLME_DISABLED;
762 ieee80211_sta_send_apinfo(sdata, ifsta);
766 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
767 sdata->dev->name, ifsta->bssid,
768 ifsta->direct_probe_tries);
770 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
772 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request);
774 /* Direct probe is sent to broadcast address as some APs
775 * will not answer to direct packet in unassociated state.
777 ieee80211_send_probe_req(sdata, NULL,
778 ifsta->ssid, ifsta->ssid_len);
780 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
784 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
785 struct ieee80211_if_sta *ifsta)
788 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
789 printk(KERN_DEBUG "%s: authentication with AP %pM"
791 sdata->dev->name, ifsta->bssid);
792 ifsta->state = IEEE80211_STA_MLME_DISABLED;
793 ieee80211_sta_send_apinfo(sdata, ifsta);
797 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
798 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
799 sdata->dev->name, ifsta->bssid);
801 ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
803 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
806 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
807 struct ieee80211_if_sta *ifsta, bool deauth,
808 bool self_disconnected, u16 reason)
810 struct ieee80211_local *local = sdata->local;
811 struct sta_info *sta;
816 sta = sta_info_get(local, ifsta->bssid);
823 ifsta->direct_probe_tries = 0;
824 ifsta->auth_tries = 0;
826 ifsta->assoc_scan_tries = 0;
827 ifsta->assoc_tries = 0;
829 netif_tx_stop_all_queues(sdata->dev);
830 netif_carrier_off(sdata->dev);
832 ieee80211_sta_tear_down_BA_sessions(sdata, sta->sta.addr);
834 if (self_disconnected) {
836 ieee80211_send_deauth_disassoc(sdata,
837 IEEE80211_STYPE_DEAUTH, reason);
839 ieee80211_send_deauth_disassoc(sdata,
840 IEEE80211_STYPE_DISASSOC, reason);
843 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
844 changed |= ieee80211_reset_erp_info(sdata);
846 ieee80211_led_assoc(local, 0);
847 changed |= BSS_CHANGED_ASSOC;
848 sdata->vif.bss_conf.assoc = false;
850 ieee80211_sta_send_apinfo(sdata, ifsta);
852 if (self_disconnected)
853 ifsta->state = IEEE80211_STA_MLME_DISABLED;
855 sta_info_unlink(&sta);
859 sta_info_destroy(sta);
861 local->hw.conf.ht.enabled = false;
862 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_HT);
864 ieee80211_bss_info_change_notify(sdata, changed);
867 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
869 if (!sdata || !sdata->default_key ||
870 sdata->default_key->conf.alg != ALG_WEP)
875 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
876 struct ieee80211_if_sta *ifsta)
878 struct ieee80211_local *local = sdata->local;
879 struct ieee80211_bss *bss;
884 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
887 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
888 local->hw.conf.channel->center_freq,
889 ifsta->ssid, ifsta->ssid_len);
893 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
894 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
895 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
897 ieee80211_rx_bss_put(local, bss);
899 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
905 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
906 struct ieee80211_if_sta *ifsta)
908 ifsta->assoc_tries++;
909 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
910 printk(KERN_DEBUG "%s: association with AP %pM"
912 sdata->dev->name, ifsta->bssid);
913 ifsta->state = IEEE80211_STA_MLME_DISABLED;
914 ieee80211_sta_send_apinfo(sdata, ifsta);
918 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
919 printk(KERN_DEBUG "%s: associate with AP %pM\n",
920 sdata->dev->name, ifsta->bssid);
921 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
922 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
923 "mixed-cell disabled - abort association\n", sdata->dev->name);
924 ifsta->state = IEEE80211_STA_MLME_DISABLED;
928 ieee80211_send_assoc(sdata, ifsta);
930 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
934 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
935 struct ieee80211_if_sta *ifsta)
937 struct ieee80211_local *local = sdata->local;
938 struct sta_info *sta;
941 /* TODO: start monitoring current AP signal quality and number of
942 * missed beacons. Scan other channels every now and then and search
944 /* TODO: remove expired BSSes */
946 ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
950 sta = sta_info_get(local, ifsta->bssid);
952 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
953 sdata->dev->name, ifsta->bssid);
957 if (time_after(jiffies,
958 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
959 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
960 printk(KERN_DEBUG "%s: No ProbeResp from "
961 "current AP %pM - assume out of "
963 sdata->dev->name, ifsta->bssid);
966 ieee80211_send_probe_req(sdata, ifsta->bssid,
969 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
971 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
972 if (time_after(jiffies, ifsta->last_probe +
973 IEEE80211_PROBE_INTERVAL)) {
974 ifsta->last_probe = jiffies;
975 ieee80211_send_probe_req(sdata, ifsta->bssid,
985 ieee80211_set_disassoc(sdata, ifsta, true, true,
986 WLAN_REASON_PREV_AUTH_NOT_VALID);
988 mod_timer(&ifsta->timer, jiffies +
989 IEEE80211_MONITORING_INTERVAL);
993 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
994 struct ieee80211_if_sta *ifsta)
996 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
997 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
998 ieee80211_associate(sdata, ifsta);
1002 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1003 struct ieee80211_if_sta *ifsta,
1004 struct ieee80211_mgmt *mgmt,
1008 struct ieee802_11_elems elems;
1010 pos = mgmt->u.auth.variable;
1011 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1012 if (!elems.challenge)
1014 ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
1015 elems.challenge_len + 2, 1);
1018 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1019 struct ieee80211_if_sta *ifsta,
1020 struct ieee80211_mgmt *mgmt,
1023 u16 auth_alg, auth_transaction, status_code;
1025 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
1026 sdata->vif.type != NL80211_IFTYPE_ADHOC)
1032 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
1033 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1036 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
1037 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1040 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1041 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1042 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1044 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
1046 * IEEE 802.11 standard does not require authentication in IBSS
1047 * networks and most implementations do not seem to use it.
1048 * However, try to reply to authentication attempts if someone
1049 * has actually implemented this.
1051 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
1053 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
1056 if (auth_alg != ifsta->auth_alg ||
1057 auth_transaction != ifsta->auth_transaction)
1060 if (status_code != WLAN_STATUS_SUCCESS) {
1061 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1063 const int num_algs = ARRAY_SIZE(algs);
1065 algs[0] = algs[1] = algs[2] = 0xff;
1066 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1067 algs[0] = WLAN_AUTH_OPEN;
1068 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1069 algs[1] = WLAN_AUTH_SHARED_KEY;
1070 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1071 algs[2] = WLAN_AUTH_LEAP;
1072 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1074 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1078 for (i = 0; i < num_algs; i++) {
1080 if (pos >= num_algs)
1082 if (algs[pos] == ifsta->auth_alg ||
1085 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1086 !ieee80211_sta_wep_configured(sdata))
1088 ifsta->auth_alg = algs[pos];
1095 switch (ifsta->auth_alg) {
1096 case WLAN_AUTH_OPEN:
1097 case WLAN_AUTH_LEAP:
1098 ieee80211_auth_completed(sdata, ifsta);
1100 case WLAN_AUTH_SHARED_KEY:
1101 if (ifsta->auth_transaction == 4)
1102 ieee80211_auth_completed(sdata, ifsta);
1104 ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
1110 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1111 struct ieee80211_if_sta *ifsta,
1112 struct ieee80211_mgmt *mgmt,
1120 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1123 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1125 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
1126 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1127 sdata->dev->name, reason_code);
1129 if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1130 ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
1131 ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1132 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1133 mod_timer(&ifsta->timer, jiffies +
1134 IEEE80211_RETRY_AUTH_INTERVAL);
1137 ieee80211_set_disassoc(sdata, ifsta, true, false, 0);
1138 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1142 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1143 struct ieee80211_if_sta *ifsta,
1144 struct ieee80211_mgmt *mgmt,
1152 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1155 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1157 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1158 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1159 sdata->dev->name, reason_code);
1161 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1162 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
1163 mod_timer(&ifsta->timer, jiffies +
1164 IEEE80211_RETRY_AUTH_INTERVAL);
1167 ieee80211_set_disassoc(sdata, ifsta, false, false, 0);
1171 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1172 struct ieee80211_if_sta *ifsta,
1173 struct ieee80211_mgmt *mgmt,
1177 struct ieee80211_local *local = sdata->local;
1178 struct ieee80211_supported_band *sband;
1179 struct sta_info *sta;
1180 u64 rates, basic_rates;
1181 u16 capab_info, status_code, aid;
1182 struct ieee802_11_elems elems;
1183 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1187 bool have_higher_than_11mbit = false, newsta = false;
1188 u16 ap_ht_cap_flags;
1190 /* AssocResp and ReassocResp have identical structure, so process both
1191 * of them in this function. */
1193 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
1199 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1202 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1203 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1204 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1206 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1207 "status=%d aid=%d)\n",
1208 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1209 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1211 if (status_code != WLAN_STATUS_SUCCESS) {
1212 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1213 sdata->dev->name, status_code);
1214 /* if this was a reassociation, ensure we try a "full"
1215 * association next time. This works around some broken APs
1216 * which do not correctly reject reassociation requests. */
1217 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1221 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1222 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1223 "set\n", sdata->dev->name, aid);
1224 aid &= ~(BIT(15) | BIT(14));
1226 pos = mgmt->u.assoc_resp.variable;
1227 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1229 if (!elems.supp_rates) {
1230 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1235 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1237 ifsta->ap_capab = capab_info;
1239 kfree(ifsta->assocresp_ies);
1240 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1241 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1242 if (ifsta->assocresp_ies)
1243 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1247 /* Add STA entry for the AP */
1248 sta = sta_info_get(local, ifsta->bssid);
1250 struct ieee80211_bss *bss;
1254 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1256 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1257 " the AP\n", sdata->dev->name);
1261 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
1262 local->hw.conf.channel->center_freq,
1263 ifsta->ssid, ifsta->ssid_len);
1265 sta->last_signal = bss->signal;
1266 sta->last_qual = bss->qual;
1267 sta->last_noise = bss->noise;
1268 ieee80211_rx_bss_put(local, bss);
1271 /* update new sta with its last rx activity */
1272 sta->last_rx = jiffies;
1276 * FIXME: Do we really need to update the sta_info's information here?
1277 * We already know about the AP (we found it in our list) so it
1278 * should already be filled with the right info, no?
1279 * As is stands, all this is racy because typically we assume
1280 * the information that is filled in here (except flags) doesn't
1281 * change while a STA structure is alive. As such, it should move
1282 * to between the sta_info_alloc() and sta_info_insert() above.
1285 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1286 WLAN_STA_AUTHORIZED);
1290 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1292 for (i = 0; i < elems.supp_rates_len; i++) {
1293 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1296 have_higher_than_11mbit = true;
1298 for (j = 0; j < sband->n_bitrates; j++) {
1299 if (sband->bitrates[j].bitrate == rate)
1301 if (elems.supp_rates[i] & 0x80)
1302 basic_rates |= BIT(j);
1306 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1307 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1310 have_higher_than_11mbit = true;
1312 for (j = 0; j < sband->n_bitrates; j++) {
1313 if (sband->bitrates[j].bitrate == rate)
1315 if (elems.ext_supp_rates[i] & 0x80)
1316 basic_rates |= BIT(j);
1320 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1321 sdata->vif.bss_conf.basic_rates = basic_rates;
1323 /* cf. IEEE 802.11 9.2.12 */
1324 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1325 have_higher_than_11mbit)
1326 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1328 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1330 if (elems.ht_cap_elem)
1331 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1332 elems.ht_cap_elem, &sta->sta.ht_cap);
1334 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1336 rate_control_rate_init(sta);
1338 if (elems.wmm_param)
1339 set_sta_flags(sta, WLAN_STA_WME);
1342 int err = sta_info_insert(sta);
1344 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1345 " the AP (error %d)\n", sdata->dev->name, err);
1353 if (elems.wmm_param)
1354 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1355 elems.wmm_param_len);
1357 if (elems.ht_info_elem && elems.wmm_param &&
1358 (ifsta->flags & IEEE80211_STA_WMM_ENABLED))
1359 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1362 /* set AID and assoc capability,
1363 * ieee80211_set_associated() will tell the driver */
1364 bss_conf->aid = aid;
1365 bss_conf->assoc_capability = capab_info;
1366 ieee80211_set_associated(sdata, ifsta, changed);
1368 ieee80211_associated(sdata, ifsta);
1372 static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
1373 struct ieee80211_if_sta *ifsta,
1374 struct ieee80211_bss *bss)
1376 struct ieee80211_local *local = sdata->local;
1377 int res, rates, i, j;
1378 struct sk_buff *skb;
1379 struct ieee80211_mgmt *mgmt;
1381 struct ieee80211_supported_band *sband;
1382 union iwreq_data wrqu;
1384 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
1386 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1387 "response\n", sdata->dev->name);
1391 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1393 /* Remove possible STA entries from other IBSS networks. */
1394 sta_info_flush_delayed(sdata);
1396 if (local->ops->reset_tsf) {
1397 /* Reset own TSF to allow time synchronization work. */
1398 local->ops->reset_tsf(local_to_hw(local));
1400 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
1401 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
1405 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
1407 sdata->drop_unencrypted = bss->capability &
1408 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
1410 res = ieee80211_set_freq(sdata, bss->freq);
1415 /* Build IBSS probe response */
1417 skb_reserve(skb, local->hw.extra_tx_headroom);
1419 mgmt = (struct ieee80211_mgmt *)
1420 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
1421 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
1422 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1423 IEEE80211_STYPE_PROBE_RESP);
1424 memset(mgmt->da, 0xff, ETH_ALEN);
1425 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1426 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1427 mgmt->u.beacon.beacon_int =
1428 cpu_to_le16(local->hw.conf.beacon_int);
1429 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
1430 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
1432 pos = skb_put(skb, 2 + ifsta->ssid_len);
1433 *pos++ = WLAN_EID_SSID;
1434 *pos++ = ifsta->ssid_len;
1435 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
1437 rates = bss->supp_rates_len;
1440 pos = skb_put(skb, 2 + rates);
1441 *pos++ = WLAN_EID_SUPP_RATES;
1443 memcpy(pos, bss->supp_rates, rates);
1445 if (bss->band == IEEE80211_BAND_2GHZ) {
1446 pos = skb_put(skb, 2 + 1);
1447 *pos++ = WLAN_EID_DS_PARAMS;
1449 *pos++ = ieee80211_frequency_to_channel(bss->freq);
1452 pos = skb_put(skb, 2 + 2);
1453 *pos++ = WLAN_EID_IBSS_PARAMS;
1455 /* FIX: set ATIM window based on scan results */
1459 if (bss->supp_rates_len > 8) {
1460 rates = bss->supp_rates_len - 8;
1461 pos = skb_put(skb, 2 + rates);
1462 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1464 memcpy(pos, &bss->supp_rates[8], rates);
1467 ifsta->probe_resp = skb;
1469 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
1473 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1474 for (i = 0; i < bss->supp_rates_len; i++) {
1475 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
1476 for (j = 0; j < sband->n_bitrates; j++)
1477 if (sband->bitrates[j].bitrate == bitrate)
1480 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
1482 ieee80211_sta_def_wmm_params(sdata, bss);
1484 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
1485 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1487 ieee80211_led_assoc(local, true);
1489 memset(&wrqu, 0, sizeof(wrqu));
1490 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
1491 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
1496 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1497 struct ieee80211_mgmt *mgmt,
1499 struct ieee80211_rx_status *rx_status,
1500 struct ieee802_11_elems *elems,
1503 struct ieee80211_local *local = sdata->local;
1505 struct ieee80211_bss *bss;
1506 struct sta_info *sta;
1507 struct ieee80211_channel *channel;
1508 u64 beacon_timestamp, rx_timestamp;
1510 enum ieee80211_band band = rx_status->band;
1512 if (elems->ds_params && elems->ds_params_len == 1)
1513 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1515 freq = rx_status->freq;
1517 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1519 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1522 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && elems->supp_rates &&
1523 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1524 supp_rates = ieee80211_sta_get_rates(local, elems, band);
1528 sta = sta_info_get(local, mgmt->sa);
1532 prev_rates = sta->sta.supp_rates[band];
1533 /* make sure mandatory rates are always added */
1534 sta->sta.supp_rates[band] = supp_rates |
1535 ieee80211_mandatory_rates(local, band);
1537 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1538 if (sta->sta.supp_rates[band] != prev_rates)
1539 printk(KERN_DEBUG "%s: updated supp_rates set "
1540 "for %pM based on beacon info (0x%llx | "
1541 "0x%llx -> 0x%llx)\n",
1544 (unsigned long long) prev_rates,
1545 (unsigned long long) supp_rates,
1546 (unsigned long long) sta->sta.supp_rates[band]);
1549 ieee80211_ibss_add_sta(sdata, NULL, mgmt->bssid,
1550 mgmt->sa, supp_rates);
1556 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1561 /* was just updated in ieee80211_bss_info_update */
1562 beacon_timestamp = bss->timestamp;
1565 * In STA mode, the remaining parameters should not be overridden
1566 * by beacons because they're not necessarily accurate there.
1568 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
1569 bss->last_probe_resp && beacon) {
1570 ieee80211_rx_bss_put(local, bss);
1574 /* check if we need to merge IBSS */
1575 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && beacon &&
1576 bss->capability & WLAN_CAPABILITY_IBSS &&
1577 bss->freq == local->oper_channel->center_freq &&
1578 elems->ssid_len == sdata->u.sta.ssid_len &&
1579 memcmp(elems->ssid, sdata->u.sta.ssid,
1580 sdata->u.sta.ssid_len) == 0) {
1581 if (rx_status->flag & RX_FLAG_TSFT) {
1582 /* in order for correct IBSS merging we need mactime
1584 * since mactime is defined as the time the first data
1585 * symbol of the frame hits the PHY, and the timestamp
1586 * of the beacon is defined as "the time that the data
1587 * symbol containing the first bit of the timestamp is
1588 * transmitted to the PHY plus the transmitting STA’s
1589 * delays through its local PHY from the MAC-PHY
1590 * interface to its interface with the WM"
1591 * (802.11 11.1.2) - equals the time this bit arrives at
1592 * the receiver - we have to take into account the
1593 * offset between the two.
1594 * e.g: at 1 MBit that means mactime is 192 usec earlier
1595 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
1597 int rate = local->hw.wiphy->bands[band]->
1598 bitrates[rx_status->rate_idx].bitrate;
1599 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
1600 } else if (local && local->ops && local->ops->get_tsf)
1601 /* second best option: get current TSF */
1602 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
1604 /* can't merge without knowing the TSF */
1605 rx_timestamp = -1LLU;
1606 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1607 printk(KERN_DEBUG "RX beacon SA=%pM BSSID="
1608 "%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
1609 mgmt->sa, mgmt->bssid,
1610 (unsigned long long)rx_timestamp,
1611 (unsigned long long)beacon_timestamp,
1612 (unsigned long long)(rx_timestamp - beacon_timestamp),
1614 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1615 if (beacon_timestamp > rx_timestamp) {
1616 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1617 printk(KERN_DEBUG "%s: beacon TSF higher than "
1618 "local TSF - IBSS merge with BSSID %pM\n",
1619 sdata->dev->name, mgmt->bssid);
1621 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
1622 ieee80211_ibss_add_sta(sdata, NULL,
1623 mgmt->bssid, mgmt->sa,
1628 ieee80211_rx_bss_put(local, bss);
1632 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1633 struct ieee80211_mgmt *mgmt,
1635 struct ieee80211_rx_status *rx_status)
1638 struct ieee802_11_elems elems;
1639 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1641 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1642 return; /* ignore ProbeResp to foreign address */
1644 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1648 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1651 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1653 /* direct probe may be part of the association flow */
1654 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1656 printk(KERN_DEBUG "%s direct probe responded\n",
1658 ieee80211_authenticate(sdata, ifsta);
1663 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1664 struct ieee80211_mgmt *mgmt,
1666 struct ieee80211_rx_status *rx_status)
1668 struct ieee80211_if_sta *ifsta;
1670 struct ieee802_11_elems elems;
1671 struct ieee80211_local *local = sdata->local;
1676 /* Process beacon from the current BSS */
1677 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1681 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1683 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
1685 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1687 ifsta = &sdata->u.sta;
1689 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
1690 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1693 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1694 elems.wmm_param_len);
1697 if (elems.erp_info && elems.erp_info_len >= 1) {
1699 erp_value = elems.erp_info[0];
1703 changed |= ieee80211_handle_bss_capability(sdata,
1704 le16_to_cpu(mgmt->u.beacon.capab_info),
1705 erp_valid, erp_value);
1708 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param) {
1709 struct sta_info *sta;
1710 struct ieee80211_supported_band *sband;
1711 u16 ap_ht_cap_flags;
1715 sta = sta_info_get(local, ifsta->bssid);
1721 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1723 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1724 elems.ht_cap_elem, &sta->sta.ht_cap);
1726 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1730 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1734 ieee80211_bss_info_change_notify(sdata, changed);
1738 static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
1739 struct ieee80211_if_sta *ifsta,
1740 struct ieee80211_mgmt *mgmt,
1742 struct ieee80211_rx_status *rx_status)
1744 struct ieee80211_local *local = sdata->local;
1746 struct sk_buff *skb;
1747 struct ieee80211_mgmt *resp;
1750 if (sdata->vif.type != NL80211_IFTYPE_ADHOC ||
1751 ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
1752 len < 24 + 2 || !ifsta->probe_resp)
1755 if (local->ops->tx_last_beacon)
1756 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1760 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1761 printk(KERN_DEBUG "%s: RX ProbeReq SA=%pM DA=%pM BSSID=%pM"
1762 " (tx_last_beacon=%d)\n",
1763 sdata->dev->name, mgmt->sa, mgmt->da,
1764 mgmt->bssid, tx_last_beacon);
1765 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1767 if (!tx_last_beacon)
1770 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1771 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1774 end = ((u8 *) mgmt) + len;
1775 pos = mgmt->u.probe_req.variable;
1776 if (pos[0] != WLAN_EID_SSID ||
1777 pos + 2 + pos[1] > end) {
1778 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1779 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
1781 sdata->dev->name, mgmt->sa);
1786 (pos[1] != ifsta->ssid_len ||
1787 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1788 /* Ignore ProbeReq for foreign SSID */
1792 /* Reply with ProbeResp */
1793 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
1797 resp = (struct ieee80211_mgmt *) skb->data;
1798 memcpy(resp->da, mgmt->sa, ETH_ALEN);
1799 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1800 printk(KERN_DEBUG "%s: Sending ProbeResp to %pM\n",
1801 sdata->dev->name, resp->da);
1802 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1803 ieee80211_tx_skb(sdata, skb, 0);
1806 void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
1807 struct ieee80211_rx_status *rx_status)
1809 struct ieee80211_local *local = sdata->local;
1810 struct ieee80211_if_sta *ifsta;
1811 struct ieee80211_mgmt *mgmt;
1817 ifsta = &sdata->u.sta;
1819 mgmt = (struct ieee80211_mgmt *) skb->data;
1820 fc = le16_to_cpu(mgmt->frame_control);
1822 switch (fc & IEEE80211_FCTL_STYPE) {
1823 case IEEE80211_STYPE_PROBE_REQ:
1824 case IEEE80211_STYPE_PROBE_RESP:
1825 case IEEE80211_STYPE_BEACON:
1826 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1827 case IEEE80211_STYPE_AUTH:
1828 case IEEE80211_STYPE_ASSOC_RESP:
1829 case IEEE80211_STYPE_REASSOC_RESP:
1830 case IEEE80211_STYPE_DEAUTH:
1831 case IEEE80211_STYPE_DISASSOC:
1832 skb_queue_tail(&ifsta->skb_queue, skb);
1833 queue_work(local->hw.workqueue, &ifsta->work);
1841 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1842 struct sk_buff *skb)
1844 struct ieee80211_rx_status *rx_status;
1845 struct ieee80211_if_sta *ifsta;
1846 struct ieee80211_mgmt *mgmt;
1849 ifsta = &sdata->u.sta;
1851 rx_status = (struct ieee80211_rx_status *) skb->cb;
1852 mgmt = (struct ieee80211_mgmt *) skb->data;
1853 fc = le16_to_cpu(mgmt->frame_control);
1855 switch (fc & IEEE80211_FCTL_STYPE) {
1856 case IEEE80211_STYPE_PROBE_REQ:
1857 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len,
1860 case IEEE80211_STYPE_PROBE_RESP:
1861 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
1863 case IEEE80211_STYPE_BEACON:
1864 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
1866 case IEEE80211_STYPE_AUTH:
1867 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
1869 case IEEE80211_STYPE_ASSOC_RESP:
1870 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
1872 case IEEE80211_STYPE_REASSOC_RESP:
1873 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
1875 case IEEE80211_STYPE_DEAUTH:
1876 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
1878 case IEEE80211_STYPE_DISASSOC:
1879 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
1887 static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
1889 struct ieee80211_local *local = sdata->local;
1891 struct sta_info *sta;
1895 list_for_each_entry_rcu(sta, &local->sta_list, list) {
1896 if (sta->sdata == sdata &&
1897 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
1910 static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
1911 struct ieee80211_if_sta *ifsta)
1913 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1915 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
1916 if (ieee80211_sta_active_ibss(sdata))
1919 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
1920 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
1921 ieee80211_request_scan(sdata, ifsta->ssid, ifsta->ssid_len);
1925 static void ieee80211_sta_timer(unsigned long data)
1927 struct ieee80211_sub_if_data *sdata =
1928 (struct ieee80211_sub_if_data *) data;
1929 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1930 struct ieee80211_local *local = sdata->local;
1932 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1933 queue_work(local->hw.workqueue, &ifsta->work);
1936 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
1937 struct ieee80211_if_sta *ifsta)
1939 struct ieee80211_local *local = sdata->local;
1941 if (local->ops->reset_tsf) {
1942 /* Reset own TSF to allow time synchronization work. */
1943 local->ops->reset_tsf(local_to_hw(local));
1946 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
1949 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1950 ifsta->auth_alg = WLAN_AUTH_OPEN;
1951 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1952 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
1953 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1954 ifsta->auth_alg = WLAN_AUTH_LEAP;
1956 ifsta->auth_alg = WLAN_AUTH_OPEN;
1957 ifsta->auth_transaction = -1;
1958 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
1959 ifsta->assoc_scan_tries = 0;
1960 ifsta->direct_probe_tries = 0;
1961 ifsta->auth_tries = 0;
1962 ifsta->assoc_tries = 0;
1963 netif_tx_stop_all_queues(sdata->dev);
1964 netif_carrier_off(sdata->dev);
1968 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
1969 const char *ssid, int ssid_len)
1971 int tmp, hidden_ssid;
1973 if (ssid_len == ifsta->ssid_len &&
1974 !memcmp(ifsta->ssid, ssid, ssid_len))
1977 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
1983 if (ssid[tmp] != '\0') {
1989 if (hidden_ssid && ifsta->ssid_len == ssid_len)
1992 if (ssid_len == 1 && ssid[0] == ' ')
1998 static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
1999 struct ieee80211_if_sta *ifsta)
2001 struct ieee80211_local *local = sdata->local;
2002 struct ieee80211_bss *bss;
2003 struct ieee80211_supported_band *sband;
2004 u8 bssid[ETH_ALEN], *pos;
2009 /* Easier testing, use fixed BSSID. */
2010 memset(bssid, 0xfe, ETH_ALEN);
2012 /* Generate random, not broadcast, locally administered BSSID. Mix in
2013 * own MAC address to make sure that devices that do not have proper
2014 * random number generator get different BSSID. */
2015 get_random_bytes(bssid, ETH_ALEN);
2016 for (i = 0; i < ETH_ALEN; i++)
2017 bssid[i] ^= sdata->dev->dev_addr[i];
2022 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %pM\n",
2023 sdata->dev->name, bssid);
2025 bss = ieee80211_rx_bss_add(local, bssid,
2026 local->hw.conf.channel->center_freq,
2027 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
2031 bss->band = local->hw.conf.channel->band;
2032 sband = local->hw.wiphy->bands[bss->band];
2034 if (local->hw.conf.beacon_int == 0)
2035 local->hw.conf.beacon_int = 100;
2036 bss->beacon_int = local->hw.conf.beacon_int;
2037 bss->last_update = jiffies;
2038 bss->capability = WLAN_CAPABILITY_IBSS;
2040 if (sdata->default_key)
2041 bss->capability |= WLAN_CAPABILITY_PRIVACY;
2043 sdata->drop_unencrypted = 0;
2045 bss->supp_rates_len = sband->n_bitrates;
2046 pos = bss->supp_rates;
2047 for (i = 0; i < sband->n_bitrates; i++) {
2048 int rate = sband->bitrates[i].bitrate;
2049 *pos++ = (u8) (rate / 5);
2052 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
2053 ieee80211_rx_bss_put(local, bss);
2058 static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
2059 struct ieee80211_if_sta *ifsta)
2061 struct ieee80211_local *local = sdata->local;
2062 struct ieee80211_bss *bss;
2067 if (ifsta->ssid_len == 0)
2070 active_ibss = ieee80211_sta_active_ibss(sdata);
2071 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2072 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2073 sdata->dev->name, active_ibss);
2074 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2075 spin_lock_bh(&local->bss_lock);
2076 list_for_each_entry(bss, &local->bss_list, list) {
2077 if (ifsta->ssid_len != bss->ssid_len ||
2078 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2079 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2081 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2082 printk(KERN_DEBUG " bssid=%pM found\n", bss->bssid);
2083 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2084 memcpy(bssid, bss->bssid, ETH_ALEN);
2086 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2089 spin_unlock_bh(&local->bss_lock);
2091 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2093 printk(KERN_DEBUG " sta_find_ibss: selected %pM current "
2094 "%pM\n", bssid, ifsta->bssid);
2095 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2097 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2101 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2102 search_freq = bss->freq;
2104 search_freq = local->hw.conf.channel->center_freq;
2106 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
2107 ifsta->ssid, ifsta->ssid_len);
2111 printk(KERN_DEBUG "%s: Selected IBSS BSSID %pM"
2112 " based on configured SSID\n",
2113 sdata->dev->name, bssid);
2114 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
2115 ieee80211_rx_bss_put(local, bss);
2120 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2121 printk(KERN_DEBUG " did not try to join ibss\n");
2122 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2124 /* Selected IBSS not found in current scan results - try to scan */
2125 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
2126 !ieee80211_sta_active_ibss(sdata)) {
2127 mod_timer(&ifsta->timer, jiffies +
2128 IEEE80211_IBSS_MERGE_INTERVAL);
2129 } else if (time_after(jiffies, local->last_scan_completed +
2130 IEEE80211_SCAN_INTERVAL)) {
2131 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
2132 "join\n", sdata->dev->name);
2133 return ieee80211_request_scan(sdata, ifsta->ssid,
2135 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
2136 int interval = IEEE80211_SCAN_INTERVAL;
2138 if (time_after(jiffies, ifsta->ibss_join_req +
2139 IEEE80211_IBSS_JOIN_TIMEOUT)) {
2140 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
2141 (!(local->oper_channel->flags &
2142 IEEE80211_CHAN_NO_IBSS)))
2143 return ieee80211_sta_create_ibss(sdata, ifsta);
2144 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
2145 printk(KERN_DEBUG "%s: IBSS not allowed on"
2146 " %d MHz\n", sdata->dev->name,
2147 local->hw.conf.channel->center_freq);
2150 /* No IBSS found - decrease scan interval and continue
2152 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2155 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2156 mod_timer(&ifsta->timer, jiffies + interval);
2164 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
2165 struct ieee80211_if_sta *ifsta)
2167 struct ieee80211_local *local = sdata->local;
2168 struct ieee80211_bss *bss, *selected = NULL;
2169 int top_rssi = 0, freq;
2171 spin_lock_bh(&local->bss_lock);
2172 freq = local->oper_channel->center_freq;
2173 list_for_each_entry(bss, &local->bss_list, list) {
2174 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2177 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2178 IEEE80211_STA_AUTO_BSSID_SEL |
2179 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
2180 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2181 !!sdata->default_key))
2184 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2188 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2189 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2192 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2193 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2196 if (!selected || top_rssi < bss->signal) {
2198 top_rssi = bss->signal;
2202 atomic_inc(&selected->users);
2203 spin_unlock_bh(&local->bss_lock);
2206 ieee80211_set_freq(sdata, selected->freq);
2207 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2208 ieee80211_sta_set_ssid(sdata, selected->ssid,
2209 selected->ssid_len);
2210 ieee80211_sta_set_bssid(sdata, selected->bssid);
2211 ieee80211_sta_def_wmm_params(sdata, selected);
2213 /* Send out direct probe if no probe resp was received or
2214 * the one we have is outdated
2216 if (!selected->last_probe_resp ||
2217 time_after(jiffies, selected->last_probe_resp
2218 + IEEE80211_SCAN_RESULT_EXPIRE))
2219 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2221 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2223 ieee80211_rx_bss_put(local, selected);
2224 ieee80211_sta_reset_auth(sdata, ifsta);
2227 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2228 ifsta->assoc_scan_tries++;
2229 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
2230 ieee80211_start_scan(sdata, NULL, 0);
2232 ieee80211_start_scan(sdata, ifsta->ssid,
2234 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2235 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2237 ifsta->state = IEEE80211_STA_MLME_DISABLED;
2243 static void ieee80211_sta_work(struct work_struct *work)
2245 struct ieee80211_sub_if_data *sdata =
2246 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2247 struct ieee80211_local *local = sdata->local;
2248 struct ieee80211_if_sta *ifsta;
2249 struct sk_buff *skb;
2251 if (!netif_running(sdata->dev))
2254 if (local->sw_scanning || local->hw_scanning)
2257 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION &&
2258 sdata->vif.type != NL80211_IFTYPE_ADHOC))
2260 ifsta = &sdata->u.sta;
2262 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2263 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2265 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2266 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2267 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
2268 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
2269 ieee80211_start_scan(sdata, ifsta->scan_ssid,
2270 ifsta->scan_ssid_len);
2274 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2275 if (ieee80211_sta_config_auth(sdata, ifsta))
2277 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2278 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2281 switch (ifsta->state) {
2282 case IEEE80211_STA_MLME_DISABLED:
2284 case IEEE80211_STA_MLME_DIRECT_PROBE:
2285 ieee80211_direct_probe(sdata, ifsta);
2287 case IEEE80211_STA_MLME_AUTHENTICATE:
2288 ieee80211_authenticate(sdata, ifsta);
2290 case IEEE80211_STA_MLME_ASSOCIATE:
2291 ieee80211_associate(sdata, ifsta);
2293 case IEEE80211_STA_MLME_ASSOCIATED:
2294 ieee80211_associated(sdata, ifsta);
2296 case IEEE80211_STA_MLME_IBSS_SEARCH:
2297 ieee80211_sta_find_ibss(sdata, ifsta);
2299 case IEEE80211_STA_MLME_IBSS_JOINED:
2300 ieee80211_sta_merge_ibss(sdata, ifsta);
2307 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
2308 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2309 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2311 ieee80211_set_disassoc(sdata, ifsta, false, true,
2312 WLAN_REASON_UNSPECIFIED);
2316 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2318 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2319 queue_work(sdata->local->hw.workqueue,
2320 &sdata->u.sta.work);
2323 /* interface setup */
2324 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2326 struct ieee80211_if_sta *ifsta;
2328 ifsta = &sdata->u.sta;
2329 INIT_WORK(&ifsta->work, ieee80211_sta_work);
2330 setup_timer(&ifsta->timer, ieee80211_sta_timer,
2331 (unsigned long) sdata);
2332 skb_queue_head_init(&ifsta->skb_queue);
2334 ifsta->capab = WLAN_CAPABILITY_ESS;
2335 ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2336 IEEE80211_AUTH_ALG_SHARED_KEY;
2337 ifsta->flags |= IEEE80211_STA_CREATE_IBSS |
2338 IEEE80211_STA_AUTO_BSSID_SEL |
2339 IEEE80211_STA_AUTO_CHANNEL_SEL;
2340 if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4)
2341 ifsta->flags |= IEEE80211_STA_WMM_ENABLED;
2345 * Add a new IBSS station, will also be called by the RX code when,
2346 * in IBSS mode, receiving a frame from a yet-unknown station, hence
2347 * must be callable in atomic context.
2349 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
2350 struct sk_buff *skb, u8 *bssid,
2351 u8 *addr, u64 supp_rates)
2353 struct ieee80211_local *local = sdata->local;
2354 struct sta_info *sta;
2355 int band = local->hw.conf.channel->band;
2357 /* TODO: Could consider removing the least recently used entry and
2358 * allow new one to be added. */
2359 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
2360 if (net_ratelimit()) {
2361 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
2362 "entry %pM\n", sdata->dev->name, addr);
2367 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
2370 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2371 printk(KERN_DEBUG "%s: Adding new IBSS station %pM (dev=%s)\n",
2372 wiphy_name(local->hw.wiphy), addr, sdata->dev->name);
2375 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
2379 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
2381 /* make sure mandatory rates are always added */
2382 sta->sta.supp_rates[band] = supp_rates |
2383 ieee80211_mandatory_rates(local, band);
2385 rate_control_rate_init(sta);
2387 if (sta_info_insert(sta))
2393 /* configuration hooks */
2394 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
2395 struct ieee80211_if_sta *ifsta)
2397 struct ieee80211_local *local = sdata->local;
2399 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2402 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2403 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2404 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2405 IEEE80211_STA_AUTO_SSID_SEL))) {
2407 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED)
2408 ieee80211_set_disassoc(sdata, ifsta, true, true,
2409 WLAN_REASON_DEAUTH_LEAVING);
2411 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2412 queue_work(local->hw.workqueue, &ifsta->work);
2416 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2418 struct ieee80211_if_sta *ifsta;
2421 if (len > IEEE80211_MAX_SSID_LEN)
2424 ifsta = &sdata->u.sta;
2426 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
2427 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
2428 memcpy(ifsta->ssid, ssid, len);
2429 ifsta->ssid_len = len;
2430 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2434 * Hack! MLME code needs to be cleaned up to have different
2435 * entry points for configuration and internal selection change
2437 if (netif_running(sdata->dev))
2438 res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID);
2440 printk(KERN_DEBUG "%s: Failed to config new SSID to "
2441 "the low-level driver\n", sdata->dev->name);
2447 ifsta->flags |= IEEE80211_STA_SSID_SET;
2449 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
2451 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
2452 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
2453 ifsta->ibss_join_req = jiffies;
2454 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2455 return ieee80211_sta_find_ibss(sdata, ifsta);
2461 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2463 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2464 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2465 *len = ifsta->ssid_len;
2469 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2471 struct ieee80211_if_sta *ifsta;
2474 ifsta = &sdata->u.sta;
2476 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2477 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2480 * Hack! See also ieee80211_sta_set_ssid.
2482 if (netif_running(sdata->dev))
2483 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
2485 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2486 "the low-level driver\n", sdata->dev->name);
2491 if (is_valid_ether_addr(bssid))
2492 ifsta->flags |= IEEE80211_STA_BSSID_SET;
2494 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
2499 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
2501 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2503 kfree(ifsta->extra_ie);
2505 ifsta->extra_ie = NULL;
2506 ifsta->extra_ie_len = 0;
2509 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
2510 if (!ifsta->extra_ie) {
2511 ifsta->extra_ie_len = 0;
2514 memcpy(ifsta->extra_ie, ie, len);
2515 ifsta->extra_ie_len = len;
2519 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2521 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2523 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2524 sdata->dev->name, reason);
2526 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
2527 sdata->vif.type != NL80211_IFTYPE_ADHOC)
2530 ieee80211_set_disassoc(sdata, ifsta, true, true, reason);
2534 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2536 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2538 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2539 sdata->dev->name, reason);
2541 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2544 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
2547 ieee80211_set_disassoc(sdata, ifsta, false, true, reason);
2551 /* scan finished notification */
2552 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2554 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2555 struct ieee80211_if_sta *ifsta;
2557 if (sdata && sdata->vif.type == NL80211_IFTYPE_ADHOC) {
2558 ifsta = &sdata->u.sta;
2559 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
2560 (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) &&
2561 !ieee80211_sta_active_ibss(sdata)))
2562 ieee80211_sta_find_ibss(sdata, ifsta);
2565 /* Restart STA timers */
2567 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2568 ieee80211_restart_sta_timer(sdata);
2572 /* driver notification call */
2573 void ieee80211_notify_mac(struct ieee80211_hw *hw,
2574 enum ieee80211_notification_types notif_type)
2576 struct ieee80211_local *local = hw_to_local(hw);
2577 struct ieee80211_sub_if_data *sdata;
2579 switch (notif_type) {
2580 case IEEE80211_NOTIFY_RE_ASSOC:
2582 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
2583 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2586 ieee80211_sta_req_auth(sdata, &sdata->u.sta);
2592 EXPORT_SYMBOL(ieee80211_notify_mac);