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\n", sdata->dev->name);
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\n", sdata->dev->name);
1159 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1160 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
1161 mod_timer(&ifsta->timer, jiffies +
1162 IEEE80211_RETRY_AUTH_INTERVAL);
1165 ieee80211_set_disassoc(sdata, ifsta, false, false, 0);
1169 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1170 struct ieee80211_if_sta *ifsta,
1171 struct ieee80211_mgmt *mgmt,
1175 struct ieee80211_local *local = sdata->local;
1176 struct ieee80211_supported_band *sband;
1177 struct sta_info *sta;
1178 u64 rates, basic_rates;
1179 u16 capab_info, status_code, aid;
1180 struct ieee802_11_elems elems;
1181 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1185 bool have_higher_than_11mbit = false, newsta = false;
1186 u16 ap_ht_cap_flags;
1188 /* AssocResp and ReassocResp have identical structure, so process both
1189 * of them in this function. */
1191 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
1197 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1200 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1201 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1202 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1204 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1205 "status=%d aid=%d)\n",
1206 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1207 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1209 if (status_code != WLAN_STATUS_SUCCESS) {
1210 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1211 sdata->dev->name, status_code);
1212 /* if this was a reassociation, ensure we try a "full"
1213 * association next time. This works around some broken APs
1214 * which do not correctly reject reassociation requests. */
1215 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1219 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1220 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1221 "set\n", sdata->dev->name, aid);
1222 aid &= ~(BIT(15) | BIT(14));
1224 pos = mgmt->u.assoc_resp.variable;
1225 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1227 if (!elems.supp_rates) {
1228 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1233 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1235 ifsta->ap_capab = capab_info;
1237 kfree(ifsta->assocresp_ies);
1238 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1239 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1240 if (ifsta->assocresp_ies)
1241 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1245 /* Add STA entry for the AP */
1246 sta = sta_info_get(local, ifsta->bssid);
1248 struct ieee80211_bss *bss;
1252 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1254 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1255 " the AP\n", sdata->dev->name);
1259 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
1260 local->hw.conf.channel->center_freq,
1261 ifsta->ssid, ifsta->ssid_len);
1263 sta->last_signal = bss->signal;
1264 sta->last_qual = bss->qual;
1265 sta->last_noise = bss->noise;
1266 ieee80211_rx_bss_put(local, bss);
1269 /* update new sta with its last rx activity */
1270 sta->last_rx = jiffies;
1274 * FIXME: Do we really need to update the sta_info's information here?
1275 * We already know about the AP (we found it in our list) so it
1276 * should already be filled with the right info, no?
1277 * As is stands, all this is racy because typically we assume
1278 * the information that is filled in here (except flags) doesn't
1279 * change while a STA structure is alive. As such, it should move
1280 * to between the sta_info_alloc() and sta_info_insert() above.
1283 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1284 WLAN_STA_AUTHORIZED);
1288 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1290 for (i = 0; i < elems.supp_rates_len; i++) {
1291 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1294 have_higher_than_11mbit = true;
1296 for (j = 0; j < sband->n_bitrates; j++) {
1297 if (sband->bitrates[j].bitrate == rate)
1299 if (elems.supp_rates[i] & 0x80)
1300 basic_rates |= BIT(j);
1304 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1305 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1308 have_higher_than_11mbit = true;
1310 for (j = 0; j < sband->n_bitrates; j++) {
1311 if (sband->bitrates[j].bitrate == rate)
1313 if (elems.ext_supp_rates[i] & 0x80)
1314 basic_rates |= BIT(j);
1318 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1319 sdata->vif.bss_conf.basic_rates = basic_rates;
1321 /* cf. IEEE 802.11 9.2.12 */
1322 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1323 have_higher_than_11mbit)
1324 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1326 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1328 if (elems.ht_cap_elem)
1329 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1330 elems.ht_cap_elem, &sta->sta.ht_cap);
1332 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1334 rate_control_rate_init(sta);
1336 if (elems.wmm_param)
1337 set_sta_flags(sta, WLAN_STA_WME);
1340 int err = sta_info_insert(sta);
1342 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1343 " the AP (error %d)\n", sdata->dev->name, err);
1351 if (elems.wmm_param)
1352 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1353 elems.wmm_param_len);
1355 if (elems.ht_info_elem && elems.wmm_param &&
1356 (ifsta->flags & IEEE80211_STA_WMM_ENABLED))
1357 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1360 /* set AID and assoc capability,
1361 * ieee80211_set_associated() will tell the driver */
1362 bss_conf->aid = aid;
1363 bss_conf->assoc_capability = capab_info;
1364 ieee80211_set_associated(sdata, ifsta, changed);
1366 ieee80211_associated(sdata, ifsta);
1370 static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
1371 struct ieee80211_if_sta *ifsta,
1372 struct ieee80211_bss *bss)
1374 struct ieee80211_local *local = sdata->local;
1375 int res, rates, i, j;
1376 struct sk_buff *skb;
1377 struct ieee80211_mgmt *mgmt;
1379 struct ieee80211_supported_band *sband;
1380 union iwreq_data wrqu;
1382 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1384 /* Remove possible STA entries from other IBSS networks. */
1385 sta_info_flush_delayed(sdata);
1387 if (local->ops->reset_tsf) {
1388 /* Reset own TSF to allow time synchronization work. */
1389 local->ops->reset_tsf(local_to_hw(local));
1391 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
1392 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
1396 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
1398 sdata->drop_unencrypted = bss->capability &
1399 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
1401 res = ieee80211_set_freq(sdata, bss->freq);
1406 /* Build IBSS probe response */
1407 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
1409 skb_reserve(skb, local->hw.extra_tx_headroom);
1411 mgmt = (struct ieee80211_mgmt *)
1412 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
1413 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
1414 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1415 IEEE80211_STYPE_PROBE_RESP);
1416 memset(mgmt->da, 0xff, ETH_ALEN);
1417 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1418 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1419 mgmt->u.beacon.beacon_int =
1420 cpu_to_le16(local->hw.conf.beacon_int);
1421 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
1422 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
1424 pos = skb_put(skb, 2 + ifsta->ssid_len);
1425 *pos++ = WLAN_EID_SSID;
1426 *pos++ = ifsta->ssid_len;
1427 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
1429 rates = bss->supp_rates_len;
1432 pos = skb_put(skb, 2 + rates);
1433 *pos++ = WLAN_EID_SUPP_RATES;
1435 memcpy(pos, bss->supp_rates, rates);
1437 if (bss->band == IEEE80211_BAND_2GHZ) {
1438 pos = skb_put(skb, 2 + 1);
1439 *pos++ = WLAN_EID_DS_PARAMS;
1441 *pos++ = ieee80211_frequency_to_channel(bss->freq);
1444 pos = skb_put(skb, 2 + 2);
1445 *pos++ = WLAN_EID_IBSS_PARAMS;
1447 /* FIX: set ATIM window based on scan results */
1451 if (bss->supp_rates_len > 8) {
1452 rates = bss->supp_rates_len - 8;
1453 pos = skb_put(skb, 2 + rates);
1454 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1456 memcpy(pos, &bss->supp_rates[8], rates);
1459 ifsta->probe_resp = skb;
1461 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
1465 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1466 for (i = 0; i < bss->supp_rates_len; i++) {
1467 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
1468 for (j = 0; j < sband->n_bitrates; j++)
1469 if (sband->bitrates[j].bitrate == bitrate)
1472 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
1474 ieee80211_sta_def_wmm_params(sdata, bss);
1476 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
1477 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1479 ieee80211_led_assoc(local, true);
1481 memset(&wrqu, 0, sizeof(wrqu));
1482 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
1483 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
1488 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1489 struct ieee80211_mgmt *mgmt,
1491 struct ieee80211_rx_status *rx_status,
1492 struct ieee802_11_elems *elems,
1495 struct ieee80211_local *local = sdata->local;
1497 struct ieee80211_bss *bss;
1498 struct sta_info *sta;
1499 struct ieee80211_channel *channel;
1500 u64 beacon_timestamp, rx_timestamp;
1502 enum ieee80211_band band = rx_status->band;
1504 if (elems->ds_params && elems->ds_params_len == 1)
1505 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1507 freq = rx_status->freq;
1509 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1511 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1514 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && elems->supp_rates &&
1515 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1516 supp_rates = ieee80211_sta_get_rates(local, elems, band);
1520 sta = sta_info_get(local, mgmt->sa);
1524 prev_rates = sta->sta.supp_rates[band];
1525 /* make sure mandatory rates are always added */
1526 sta->sta.supp_rates[band] = supp_rates |
1527 ieee80211_mandatory_rates(local, band);
1529 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1530 if (sta->sta.supp_rates[band] != prev_rates)
1531 printk(KERN_DEBUG "%s: updated supp_rates set "
1532 "for %pM based on beacon info (0x%llx | "
1533 "0x%llx -> 0x%llx)\n",
1536 (unsigned long long) prev_rates,
1537 (unsigned long long) supp_rates,
1538 (unsigned long long) sta->sta.supp_rates[band]);
1541 ieee80211_ibss_add_sta(sdata, NULL, mgmt->bssid,
1542 mgmt->sa, supp_rates);
1548 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1553 /* was just updated in ieee80211_bss_info_update */
1554 beacon_timestamp = bss->timestamp;
1557 * In STA mode, the remaining parameters should not be overridden
1558 * by beacons because they're not necessarily accurate there.
1560 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
1561 bss->last_probe_resp && beacon) {
1562 ieee80211_rx_bss_put(local, bss);
1566 /* check if we need to merge IBSS */
1567 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && beacon &&
1568 bss->capability & WLAN_CAPABILITY_IBSS &&
1569 bss->freq == local->oper_channel->center_freq &&
1570 elems->ssid_len == sdata->u.sta.ssid_len &&
1571 memcmp(elems->ssid, sdata->u.sta.ssid,
1572 sdata->u.sta.ssid_len) == 0) {
1573 if (rx_status->flag & RX_FLAG_TSFT) {
1574 /* in order for correct IBSS merging we need mactime
1576 * since mactime is defined as the time the first data
1577 * symbol of the frame hits the PHY, and the timestamp
1578 * of the beacon is defined as "the time that the data
1579 * symbol containing the first bit of the timestamp is
1580 * transmitted to the PHY plus the transmitting STA’s
1581 * delays through its local PHY from the MAC-PHY
1582 * interface to its interface with the WM"
1583 * (802.11 11.1.2) - equals the time this bit arrives at
1584 * the receiver - we have to take into account the
1585 * offset between the two.
1586 * e.g: at 1 MBit that means mactime is 192 usec earlier
1587 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
1589 int rate = local->hw.wiphy->bands[band]->
1590 bitrates[rx_status->rate_idx].bitrate;
1591 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
1592 } else if (local && local->ops && local->ops->get_tsf)
1593 /* second best option: get current TSF */
1594 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
1596 /* can't merge without knowing the TSF */
1597 rx_timestamp = -1LLU;
1598 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1599 printk(KERN_DEBUG "RX beacon SA=%pM BSSID="
1600 "%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
1601 mgmt->sa, mgmt->bssid,
1602 (unsigned long long)rx_timestamp,
1603 (unsigned long long)beacon_timestamp,
1604 (unsigned long long)(rx_timestamp - beacon_timestamp),
1606 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1607 if (beacon_timestamp > rx_timestamp) {
1608 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1609 printk(KERN_DEBUG "%s: beacon TSF higher than "
1610 "local TSF - IBSS merge with BSSID %pM\n",
1611 sdata->dev->name, mgmt->bssid);
1613 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
1614 ieee80211_ibss_add_sta(sdata, NULL,
1615 mgmt->bssid, mgmt->sa,
1620 ieee80211_rx_bss_put(local, bss);
1624 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1625 struct ieee80211_mgmt *mgmt,
1627 struct ieee80211_rx_status *rx_status)
1630 struct ieee802_11_elems elems;
1631 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1633 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1634 return; /* ignore ProbeResp to foreign address */
1636 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1640 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1643 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1645 /* direct probe may be part of the association flow */
1646 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1648 printk(KERN_DEBUG "%s direct probe responded\n",
1650 ieee80211_authenticate(sdata, ifsta);
1655 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1656 struct ieee80211_mgmt *mgmt,
1658 struct ieee80211_rx_status *rx_status)
1660 struct ieee80211_if_sta *ifsta;
1662 struct ieee802_11_elems elems;
1663 struct ieee80211_local *local = sdata->local;
1668 /* Process beacon from the current BSS */
1669 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1673 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1675 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
1677 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1679 ifsta = &sdata->u.sta;
1681 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
1682 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1685 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1686 elems.wmm_param_len);
1689 if (elems.erp_info && elems.erp_info_len >= 1) {
1691 erp_value = elems.erp_info[0];
1695 changed |= ieee80211_handle_bss_capability(sdata,
1696 le16_to_cpu(mgmt->u.beacon.capab_info),
1697 erp_valid, erp_value);
1700 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param) {
1701 struct sta_info *sta;
1702 struct ieee80211_supported_band *sband;
1703 u16 ap_ht_cap_flags;
1707 sta = sta_info_get(local, ifsta->bssid);
1713 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1715 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1716 elems.ht_cap_elem, &sta->sta.ht_cap);
1718 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1722 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1726 ieee80211_bss_info_change_notify(sdata, changed);
1730 static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
1731 struct ieee80211_if_sta *ifsta,
1732 struct ieee80211_mgmt *mgmt,
1734 struct ieee80211_rx_status *rx_status)
1736 struct ieee80211_local *local = sdata->local;
1738 struct sk_buff *skb;
1739 struct ieee80211_mgmt *resp;
1742 if (sdata->vif.type != NL80211_IFTYPE_ADHOC ||
1743 ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
1744 len < 24 + 2 || !ifsta->probe_resp)
1747 if (local->ops->tx_last_beacon)
1748 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1752 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1753 printk(KERN_DEBUG "%s: RX ProbeReq SA=%pM DA=%pM BSSID=%pM"
1754 " (tx_last_beacon=%d)\n",
1755 sdata->dev->name, mgmt->sa, mgmt->da,
1756 mgmt->bssid, tx_last_beacon);
1757 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1759 if (!tx_last_beacon)
1762 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1763 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1766 end = ((u8 *) mgmt) + len;
1767 pos = mgmt->u.probe_req.variable;
1768 if (pos[0] != WLAN_EID_SSID ||
1769 pos + 2 + pos[1] > end) {
1770 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1771 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
1773 sdata->dev->name, mgmt->sa);
1778 (pos[1] != ifsta->ssid_len ||
1779 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1780 /* Ignore ProbeReq for foreign SSID */
1784 /* Reply with ProbeResp */
1785 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
1789 resp = (struct ieee80211_mgmt *) skb->data;
1790 memcpy(resp->da, mgmt->sa, ETH_ALEN);
1791 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1792 printk(KERN_DEBUG "%s: Sending ProbeResp to %pM\n",
1793 sdata->dev->name, resp->da);
1794 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1795 ieee80211_tx_skb(sdata, skb, 0);
1798 void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
1799 struct ieee80211_rx_status *rx_status)
1801 struct ieee80211_local *local = sdata->local;
1802 struct ieee80211_if_sta *ifsta;
1803 struct ieee80211_mgmt *mgmt;
1809 ifsta = &sdata->u.sta;
1811 mgmt = (struct ieee80211_mgmt *) skb->data;
1812 fc = le16_to_cpu(mgmt->frame_control);
1814 switch (fc & IEEE80211_FCTL_STYPE) {
1815 case IEEE80211_STYPE_PROBE_REQ:
1816 case IEEE80211_STYPE_PROBE_RESP:
1817 case IEEE80211_STYPE_BEACON:
1818 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1819 case IEEE80211_STYPE_AUTH:
1820 case IEEE80211_STYPE_ASSOC_RESP:
1821 case IEEE80211_STYPE_REASSOC_RESP:
1822 case IEEE80211_STYPE_DEAUTH:
1823 case IEEE80211_STYPE_DISASSOC:
1824 skb_queue_tail(&ifsta->skb_queue, skb);
1825 queue_work(local->hw.workqueue, &ifsta->work);
1833 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1834 struct sk_buff *skb)
1836 struct ieee80211_rx_status *rx_status;
1837 struct ieee80211_if_sta *ifsta;
1838 struct ieee80211_mgmt *mgmt;
1841 ifsta = &sdata->u.sta;
1843 rx_status = (struct ieee80211_rx_status *) skb->cb;
1844 mgmt = (struct ieee80211_mgmt *) skb->data;
1845 fc = le16_to_cpu(mgmt->frame_control);
1847 switch (fc & IEEE80211_FCTL_STYPE) {
1848 case IEEE80211_STYPE_PROBE_REQ:
1849 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len,
1852 case IEEE80211_STYPE_PROBE_RESP:
1853 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
1855 case IEEE80211_STYPE_BEACON:
1856 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
1858 case IEEE80211_STYPE_AUTH:
1859 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
1861 case IEEE80211_STYPE_ASSOC_RESP:
1862 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
1864 case IEEE80211_STYPE_REASSOC_RESP:
1865 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
1867 case IEEE80211_STYPE_DEAUTH:
1868 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
1870 case IEEE80211_STYPE_DISASSOC:
1871 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
1879 static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
1881 struct ieee80211_local *local = sdata->local;
1883 struct sta_info *sta;
1887 list_for_each_entry_rcu(sta, &local->sta_list, list) {
1888 if (sta->sdata == sdata &&
1889 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
1902 static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
1903 struct ieee80211_if_sta *ifsta)
1905 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1907 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
1908 if (ieee80211_sta_active_ibss(sdata))
1911 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
1912 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
1913 ieee80211_request_scan(sdata, ifsta->ssid, ifsta->ssid_len);
1917 static void ieee80211_sta_timer(unsigned long data)
1919 struct ieee80211_sub_if_data *sdata =
1920 (struct ieee80211_sub_if_data *) data;
1921 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1922 struct ieee80211_local *local = sdata->local;
1924 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1925 queue_work(local->hw.workqueue, &ifsta->work);
1928 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
1929 struct ieee80211_if_sta *ifsta)
1931 struct ieee80211_local *local = sdata->local;
1933 if (local->ops->reset_tsf) {
1934 /* Reset own TSF to allow time synchronization work. */
1935 local->ops->reset_tsf(local_to_hw(local));
1938 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
1941 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1942 ifsta->auth_alg = WLAN_AUTH_OPEN;
1943 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1944 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
1945 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1946 ifsta->auth_alg = WLAN_AUTH_LEAP;
1948 ifsta->auth_alg = WLAN_AUTH_OPEN;
1949 ifsta->auth_transaction = -1;
1950 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
1951 ifsta->assoc_scan_tries = 0;
1952 ifsta->direct_probe_tries = 0;
1953 ifsta->auth_tries = 0;
1954 ifsta->assoc_tries = 0;
1955 netif_tx_stop_all_queues(sdata->dev);
1956 netif_carrier_off(sdata->dev);
1960 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
1961 const char *ssid, int ssid_len)
1963 int tmp, hidden_ssid;
1965 if (ssid_len == ifsta->ssid_len &&
1966 !memcmp(ifsta->ssid, ssid, ssid_len))
1969 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
1975 if (ssid[tmp] != '\0') {
1981 if (hidden_ssid && ifsta->ssid_len == ssid_len)
1984 if (ssid_len == 1 && ssid[0] == ' ')
1990 static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
1991 struct ieee80211_if_sta *ifsta)
1993 struct ieee80211_local *local = sdata->local;
1994 struct ieee80211_bss *bss;
1995 struct ieee80211_supported_band *sband;
1996 u8 bssid[ETH_ALEN], *pos;
2001 /* Easier testing, use fixed BSSID. */
2002 memset(bssid, 0xfe, ETH_ALEN);
2004 /* Generate random, not broadcast, locally administered BSSID. Mix in
2005 * own MAC address to make sure that devices that do not have proper
2006 * random number generator get different BSSID. */
2007 get_random_bytes(bssid, ETH_ALEN);
2008 for (i = 0; i < ETH_ALEN; i++)
2009 bssid[i] ^= sdata->dev->dev_addr[i];
2014 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %pM\n",
2015 sdata->dev->name, bssid);
2017 bss = ieee80211_rx_bss_add(local, bssid,
2018 local->hw.conf.channel->center_freq,
2019 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
2023 bss->band = local->hw.conf.channel->band;
2024 sband = local->hw.wiphy->bands[bss->band];
2026 if (local->hw.conf.beacon_int == 0)
2027 local->hw.conf.beacon_int = 100;
2028 bss->beacon_int = local->hw.conf.beacon_int;
2029 bss->last_update = jiffies;
2030 bss->capability = WLAN_CAPABILITY_IBSS;
2032 if (sdata->default_key)
2033 bss->capability |= WLAN_CAPABILITY_PRIVACY;
2035 sdata->drop_unencrypted = 0;
2037 bss->supp_rates_len = sband->n_bitrates;
2038 pos = bss->supp_rates;
2039 for (i = 0; i < sband->n_bitrates; i++) {
2040 int rate = sband->bitrates[i].bitrate;
2041 *pos++ = (u8) (rate / 5);
2044 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
2045 ieee80211_rx_bss_put(local, bss);
2050 static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
2051 struct ieee80211_if_sta *ifsta)
2053 struct ieee80211_local *local = sdata->local;
2054 struct ieee80211_bss *bss;
2059 if (ifsta->ssid_len == 0)
2062 active_ibss = ieee80211_sta_active_ibss(sdata);
2063 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2064 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2065 sdata->dev->name, active_ibss);
2066 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2067 spin_lock_bh(&local->bss_lock);
2068 list_for_each_entry(bss, &local->bss_list, list) {
2069 if (ifsta->ssid_len != bss->ssid_len ||
2070 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2071 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2073 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2074 printk(KERN_DEBUG " bssid=%pM found\n", bss->bssid);
2075 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2076 memcpy(bssid, bss->bssid, ETH_ALEN);
2078 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2081 spin_unlock_bh(&local->bss_lock);
2083 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2085 printk(KERN_DEBUG " sta_find_ibss: selected %pM current "
2086 "%pM\n", bssid, ifsta->bssid);
2087 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2089 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2093 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2094 search_freq = bss->freq;
2096 search_freq = local->hw.conf.channel->center_freq;
2098 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
2099 ifsta->ssid, ifsta->ssid_len);
2103 printk(KERN_DEBUG "%s: Selected IBSS BSSID %pM"
2104 " based on configured SSID\n",
2105 sdata->dev->name, bssid);
2106 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
2107 ieee80211_rx_bss_put(local, bss);
2112 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2113 printk(KERN_DEBUG " did not try to join ibss\n");
2114 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2116 /* Selected IBSS not found in current scan results - try to scan */
2117 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
2118 !ieee80211_sta_active_ibss(sdata)) {
2119 mod_timer(&ifsta->timer, jiffies +
2120 IEEE80211_IBSS_MERGE_INTERVAL);
2121 } else if (time_after(jiffies, local->last_scan_completed +
2122 IEEE80211_SCAN_INTERVAL)) {
2123 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
2124 "join\n", sdata->dev->name);
2125 return ieee80211_request_scan(sdata, ifsta->ssid,
2127 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
2128 int interval = IEEE80211_SCAN_INTERVAL;
2130 if (time_after(jiffies, ifsta->ibss_join_req +
2131 IEEE80211_IBSS_JOIN_TIMEOUT)) {
2132 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
2133 (!(local->oper_channel->flags &
2134 IEEE80211_CHAN_NO_IBSS)))
2135 return ieee80211_sta_create_ibss(sdata, ifsta);
2136 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
2137 printk(KERN_DEBUG "%s: IBSS not allowed on"
2138 " %d MHz\n", sdata->dev->name,
2139 local->hw.conf.channel->center_freq);
2142 /* No IBSS found - decrease scan interval and continue
2144 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2147 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2148 mod_timer(&ifsta->timer, jiffies + interval);
2156 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
2157 struct ieee80211_if_sta *ifsta)
2159 struct ieee80211_local *local = sdata->local;
2160 struct ieee80211_bss *bss, *selected = NULL;
2161 int top_rssi = 0, freq;
2163 spin_lock_bh(&local->bss_lock);
2164 freq = local->oper_channel->center_freq;
2165 list_for_each_entry(bss, &local->bss_list, list) {
2166 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2169 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2170 IEEE80211_STA_AUTO_BSSID_SEL |
2171 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
2172 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2173 !!sdata->default_key))
2176 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2180 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2181 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2184 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2185 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2188 if (!selected || top_rssi < bss->signal) {
2190 top_rssi = bss->signal;
2194 atomic_inc(&selected->users);
2195 spin_unlock_bh(&local->bss_lock);
2198 ieee80211_set_freq(sdata, selected->freq);
2199 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2200 ieee80211_sta_set_ssid(sdata, selected->ssid,
2201 selected->ssid_len);
2202 ieee80211_sta_set_bssid(sdata, selected->bssid);
2203 ieee80211_sta_def_wmm_params(sdata, selected);
2205 /* Send out direct probe if no probe resp was received or
2206 * the one we have is outdated
2208 if (!selected->last_probe_resp ||
2209 time_after(jiffies, selected->last_probe_resp
2210 + IEEE80211_SCAN_RESULT_EXPIRE))
2211 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2213 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2215 ieee80211_rx_bss_put(local, selected);
2216 ieee80211_sta_reset_auth(sdata, ifsta);
2219 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2220 ifsta->assoc_scan_tries++;
2221 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
2222 ieee80211_start_scan(sdata, NULL, 0);
2224 ieee80211_start_scan(sdata, ifsta->ssid,
2226 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2227 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2229 ifsta->state = IEEE80211_STA_MLME_DISABLED;
2235 static void ieee80211_sta_work(struct work_struct *work)
2237 struct ieee80211_sub_if_data *sdata =
2238 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2239 struct ieee80211_local *local = sdata->local;
2240 struct ieee80211_if_sta *ifsta;
2241 struct sk_buff *skb;
2243 if (!netif_running(sdata->dev))
2246 if (local->sw_scanning || local->hw_scanning)
2249 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION &&
2250 sdata->vif.type != NL80211_IFTYPE_ADHOC))
2252 ifsta = &sdata->u.sta;
2254 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2255 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2257 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2258 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2259 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
2260 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
2261 ieee80211_start_scan(sdata, ifsta->scan_ssid,
2262 ifsta->scan_ssid_len);
2266 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2267 if (ieee80211_sta_config_auth(sdata, ifsta))
2269 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2270 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2273 switch (ifsta->state) {
2274 case IEEE80211_STA_MLME_DISABLED:
2276 case IEEE80211_STA_MLME_DIRECT_PROBE:
2277 ieee80211_direct_probe(sdata, ifsta);
2279 case IEEE80211_STA_MLME_AUTHENTICATE:
2280 ieee80211_authenticate(sdata, ifsta);
2282 case IEEE80211_STA_MLME_ASSOCIATE:
2283 ieee80211_associate(sdata, ifsta);
2285 case IEEE80211_STA_MLME_ASSOCIATED:
2286 ieee80211_associated(sdata, ifsta);
2288 case IEEE80211_STA_MLME_IBSS_SEARCH:
2289 ieee80211_sta_find_ibss(sdata, ifsta);
2291 case IEEE80211_STA_MLME_IBSS_JOINED:
2292 ieee80211_sta_merge_ibss(sdata, ifsta);
2299 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
2300 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2301 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2303 ieee80211_set_disassoc(sdata, ifsta, false, true,
2304 WLAN_REASON_UNSPECIFIED);
2308 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2310 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2311 queue_work(sdata->local->hw.workqueue,
2312 &sdata->u.sta.work);
2315 /* interface setup */
2316 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2318 struct ieee80211_if_sta *ifsta;
2320 ifsta = &sdata->u.sta;
2321 INIT_WORK(&ifsta->work, ieee80211_sta_work);
2322 setup_timer(&ifsta->timer, ieee80211_sta_timer,
2323 (unsigned long) sdata);
2324 skb_queue_head_init(&ifsta->skb_queue);
2326 ifsta->capab = WLAN_CAPABILITY_ESS;
2327 ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2328 IEEE80211_AUTH_ALG_SHARED_KEY;
2329 ifsta->flags |= IEEE80211_STA_CREATE_IBSS |
2330 IEEE80211_STA_AUTO_BSSID_SEL |
2331 IEEE80211_STA_AUTO_CHANNEL_SEL;
2332 if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4)
2333 ifsta->flags |= IEEE80211_STA_WMM_ENABLED;
2337 * Add a new IBSS station, will also be called by the RX code when,
2338 * in IBSS mode, receiving a frame from a yet-unknown station, hence
2339 * must be callable in atomic context.
2341 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
2342 struct sk_buff *skb, u8 *bssid,
2343 u8 *addr, u64 supp_rates)
2345 struct ieee80211_local *local = sdata->local;
2346 struct sta_info *sta;
2347 int band = local->hw.conf.channel->band;
2349 /* TODO: Could consider removing the least recently used entry and
2350 * allow new one to be added. */
2351 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
2352 if (net_ratelimit()) {
2353 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
2354 "entry %pM\n", sdata->dev->name, addr);
2359 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
2362 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2363 printk(KERN_DEBUG "%s: Adding new IBSS station %pM (dev=%s)\n",
2364 wiphy_name(local->hw.wiphy), addr, sdata->dev->name);
2367 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
2371 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
2373 /* make sure mandatory rates are always added */
2374 sta->sta.supp_rates[band] = supp_rates |
2375 ieee80211_mandatory_rates(local, band);
2377 rate_control_rate_init(sta);
2379 if (sta_info_insert(sta))
2385 /* configuration hooks */
2386 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
2387 struct ieee80211_if_sta *ifsta)
2389 struct ieee80211_local *local = sdata->local;
2391 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2394 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2395 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2396 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2397 IEEE80211_STA_AUTO_SSID_SEL))) {
2399 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED)
2400 ieee80211_set_disassoc(sdata, ifsta, true, true,
2401 WLAN_REASON_DEAUTH_LEAVING);
2403 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2404 queue_work(local->hw.workqueue, &ifsta->work);
2408 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2410 struct ieee80211_if_sta *ifsta;
2413 if (len > IEEE80211_MAX_SSID_LEN)
2416 ifsta = &sdata->u.sta;
2418 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
2419 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
2420 memcpy(ifsta->ssid, ssid, len);
2421 ifsta->ssid_len = len;
2422 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2426 * Hack! MLME code needs to be cleaned up to have different
2427 * entry points for configuration and internal selection change
2429 if (netif_running(sdata->dev))
2430 res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID);
2432 printk(KERN_DEBUG "%s: Failed to config new SSID to "
2433 "the low-level driver\n", sdata->dev->name);
2439 ifsta->flags |= IEEE80211_STA_SSID_SET;
2441 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
2443 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
2444 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
2445 ifsta->ibss_join_req = jiffies;
2446 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2447 return ieee80211_sta_find_ibss(sdata, ifsta);
2453 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2455 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2456 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2457 *len = ifsta->ssid_len;
2461 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2463 struct ieee80211_if_sta *ifsta;
2466 ifsta = &sdata->u.sta;
2468 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2469 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2472 * Hack! See also ieee80211_sta_set_ssid.
2474 if (netif_running(sdata->dev))
2475 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
2477 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2478 "the low-level driver\n", sdata->dev->name);
2483 if (is_valid_ether_addr(bssid))
2484 ifsta->flags |= IEEE80211_STA_BSSID_SET;
2486 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
2491 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
2493 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2495 kfree(ifsta->extra_ie);
2497 ifsta->extra_ie = NULL;
2498 ifsta->extra_ie_len = 0;
2501 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
2502 if (!ifsta->extra_ie) {
2503 ifsta->extra_ie_len = 0;
2506 memcpy(ifsta->extra_ie, ie, len);
2507 ifsta->extra_ie_len = len;
2511 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2513 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2515 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2516 sdata->dev->name, reason);
2518 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
2519 sdata->vif.type != NL80211_IFTYPE_ADHOC)
2522 ieee80211_set_disassoc(sdata, ifsta, true, true, reason);
2526 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2528 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2530 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2531 sdata->dev->name, reason);
2533 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2536 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
2539 ieee80211_set_disassoc(sdata, ifsta, false, true, reason);
2543 /* scan finished notification */
2544 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2546 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2547 struct ieee80211_if_sta *ifsta;
2549 if (sdata && sdata->vif.type == NL80211_IFTYPE_ADHOC) {
2550 ifsta = &sdata->u.sta;
2551 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
2552 (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) &&
2553 !ieee80211_sta_active_ibss(sdata)))
2554 ieee80211_sta_find_ibss(sdata, ifsta);
2557 /* Restart STA timers */
2559 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2560 ieee80211_restart_sta_timer(sdata);
2564 /* driver notification call */
2565 void ieee80211_notify_mac(struct ieee80211_hw *hw,
2566 enum ieee80211_notification_types notif_type)
2568 struct ieee80211_local *local = hw_to_local(hw);
2569 struct ieee80211_sub_if_data *sdata;
2571 switch (notif_type) {
2572 case IEEE80211_NOTIFY_RE_ASSOC:
2574 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
2575 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2578 ieee80211_sta_req_auth(sdata, &sdata->u.sta);
2584 EXPORT_SYMBOL(ieee80211_notify_mac);