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>
26 #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_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
38 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
39 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
40 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
41 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
42 #define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
44 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
45 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
46 #define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
48 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
52 static int ecw2cw(int ecw)
54 return (1 << ecw) - 1;
57 static u8 *ieee80211_bss_get_ie(struct ieee80211_sta_bss *bss, u8 ie)
64 end = pos + bss->ies_len;
66 while (pos + 1 < end) {
67 if (pos + 2 + pos[1] > end)
77 /* frame sending functions */
78 void ieee80211_sta_tx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
81 skb->dev = sdata->local->mdev;
82 skb_set_mac_header(skb, 0);
83 skb_set_network_header(skb, 0);
84 skb_set_transport_header(skb, 0);
86 skb->iif = sdata->dev->ifindex;
87 skb->do_not_encrypt = !encrypt;
92 static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
93 struct ieee80211_if_sta *ifsta,
94 int transaction, u8 *extra, size_t extra_len,
97 struct ieee80211_local *local = sdata->local;
99 struct ieee80211_mgmt *mgmt;
101 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
102 sizeof(*mgmt) + 6 + extra_len);
104 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
105 "frame\n", sdata->dev->name);
108 skb_reserve(skb, local->hw.extra_tx_headroom);
110 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
111 memset(mgmt, 0, 24 + 6);
112 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
113 IEEE80211_STYPE_AUTH);
115 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
116 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
117 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
118 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
119 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
120 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
121 ifsta->auth_transaction = transaction + 1;
122 mgmt->u.auth.status_code = cpu_to_le16(0);
124 memcpy(skb_put(skb, extra_len), extra, extra_len);
126 ieee80211_sta_tx(sdata, skb, encrypt);
129 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
130 u8 *ssid, size_t ssid_len)
132 struct ieee80211_local *local = sdata->local;
133 struct ieee80211_supported_band *sband;
135 struct ieee80211_mgmt *mgmt;
136 u8 *pos, *supp_rates, *esupp_rates = NULL;
139 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
141 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
142 "request\n", sdata->dev->name);
145 skb_reserve(skb, local->hw.extra_tx_headroom);
147 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
149 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
150 IEEE80211_STYPE_PROBE_REQ);
151 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
153 memcpy(mgmt->da, dst, ETH_ALEN);
154 memcpy(mgmt->bssid, dst, ETH_ALEN);
156 memset(mgmt->da, 0xff, ETH_ALEN);
157 memset(mgmt->bssid, 0xff, ETH_ALEN);
159 pos = skb_put(skb, 2 + ssid_len);
160 *pos++ = WLAN_EID_SSID;
162 memcpy(pos, ssid, ssid_len);
164 supp_rates = skb_put(skb, 2);
165 supp_rates[0] = WLAN_EID_SUPP_RATES;
167 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
169 for (i = 0; i < sband->n_bitrates; i++) {
170 struct ieee80211_rate *rate = &sband->bitrates[i];
172 pos = skb_put(skb, 1);
174 } else if (supp_rates[1] == 8) {
175 esupp_rates = skb_put(skb, 3);
176 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
178 pos = &esupp_rates[2];
180 pos = skb_put(skb, 1);
183 *pos = rate->bitrate / 5;
186 ieee80211_sta_tx(sdata, skb, 0);
190 static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
191 struct ieee80211_sta_bss *bss,
194 struct ieee80211_local *local = sdata->local;
195 int i, have_higher_than_11mbit = 0;
198 /* cf. IEEE 802.11 9.2.12 */
199 for (i = 0; i < bss->supp_rates_len; i++)
200 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
201 have_higher_than_11mbit = 1;
203 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
204 have_higher_than_11mbit)
205 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
207 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
210 if (local->ops->conf_tx) {
211 struct ieee80211_tx_queue_params qparam;
213 memset(&qparam, 0, sizeof(qparam));
217 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
218 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
223 qparam.cw_max = 1023;
226 for (i = 0; i < local_to_hw(local)->queues; i++)
227 local->ops->conf_tx(local_to_hw(local), i, &qparam);
231 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
232 struct ieee80211_if_sta *ifsta,
233 u8 *wmm_param, size_t wmm_param_len)
235 struct ieee80211_tx_queue_params params;
240 if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
246 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
248 count = wmm_param[6] & 0x0f;
249 if (count == ifsta->wmm_last_param_set)
251 ifsta->wmm_last_param_set = count;
254 left = wmm_param_len - 8;
256 memset(¶ms, 0, sizeof(params));
258 if (!local->ops->conf_tx)
262 for (; left >= 4; left -= 4, pos += 4) {
263 int aci = (pos[0] >> 5) & 0x03;
264 int acm = (pos[0] >> 4) & 0x01;
271 local->wmm_acm |= BIT(0) | BIT(3);
276 local->wmm_acm |= BIT(4) | BIT(5);
281 local->wmm_acm |= BIT(6) | BIT(7);
287 local->wmm_acm |= BIT(1) | BIT(2);
291 params.aifs = pos[0] & 0x0f;
292 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
293 params.cw_min = ecw2cw(pos[1] & 0x0f);
294 params.txop = get_unaligned_le16(pos + 2);
295 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
296 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
297 "cWmin=%d cWmax=%d txop=%d\n",
298 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
299 params.cw_max, params.txop);
301 /* TODO: handle ACM (block TX, fallback to next lowest allowed
303 if (local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) {
304 printk(KERN_DEBUG "%s: failed to set TX queue "
305 "parameters for queue %d\n", local->mdev->name, queue);
310 static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
312 bool use_short_preamble)
314 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
315 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
316 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
317 DECLARE_MAC_BUF(mac);
321 if (use_protection != bss_conf->use_cts_prot) {
322 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
323 if (net_ratelimit()) {
324 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
327 use_protection ? "enabled" : "disabled",
328 print_mac(mac, ifsta->bssid));
331 bss_conf->use_cts_prot = use_protection;
332 changed |= BSS_CHANGED_ERP_CTS_PROT;
335 if (use_short_preamble != bss_conf->use_short_preamble) {
336 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
337 if (net_ratelimit()) {
338 printk(KERN_DEBUG "%s: switched to %s barker preamble"
341 use_short_preamble ? "short" : "long",
342 print_mac(mac, ifsta->bssid));
345 bss_conf->use_short_preamble = use_short_preamble;
346 changed |= BSS_CHANGED_ERP_PREAMBLE;
352 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
355 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
356 bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
358 return ieee80211_handle_protect_preamb(sdata,
359 use_protection, use_short_preamble);
362 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
363 struct ieee80211_sta_bss *bss)
367 if (bss->has_erp_value)
368 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
370 u16 capab = bss->capability;
371 changed |= ieee80211_handle_protect_preamb(sdata, false,
372 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
378 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata,
379 struct ieee80211_if_sta *ifsta)
381 union iwreq_data wrqu;
382 memset(&wrqu, 0, sizeof(wrqu));
383 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
384 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
385 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
386 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
389 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata,
390 struct ieee80211_if_sta *ifsta)
392 union iwreq_data wrqu;
394 if (ifsta->assocreq_ies) {
395 memset(&wrqu, 0, sizeof(wrqu));
396 wrqu.data.length = ifsta->assocreq_ies_len;
397 wireless_send_event(sdata->dev, IWEVASSOCREQIE, &wrqu,
398 ifsta->assocreq_ies);
400 if (ifsta->assocresp_ies) {
401 memset(&wrqu, 0, sizeof(wrqu));
402 wrqu.data.length = ifsta->assocresp_ies_len;
403 wireless_send_event(sdata->dev, IWEVASSOCRESPIE, &wrqu,
404 ifsta->assocresp_ies);
409 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
410 struct ieee80211_if_sta *ifsta)
412 struct ieee80211_local *local = sdata->local;
413 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
414 u32 changed = BSS_CHANGED_ASSOC;
416 struct ieee80211_sta_bss *bss;
418 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
420 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
423 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
424 conf->channel->center_freq,
425 ifsta->ssid, ifsta->ssid_len);
427 /* set timing information */
428 sdata->bss_conf.beacon_int = bss->beacon_int;
429 sdata->bss_conf.timestamp = bss->timestamp;
430 sdata->bss_conf.dtim_period = bss->dtim_period;
432 changed |= ieee80211_handle_bss_capability(sdata, bss);
434 ieee80211_rx_bss_put(local, bss);
437 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
438 changed |= BSS_CHANGED_HT;
439 sdata->bss_conf.assoc_ht = 1;
440 sdata->bss_conf.ht_conf = &conf->ht_conf;
441 sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
444 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
445 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
446 ieee80211_sta_send_associnfo(sdata, ifsta);
448 ifsta->last_probe = jiffies;
449 ieee80211_led_assoc(local, 1);
451 sdata->bss_conf.assoc = 1;
452 ieee80211_bss_info_change_notify(sdata, changed);
454 netif_tx_start_all_queues(sdata->dev);
455 netif_carrier_on(sdata->dev);
457 ieee80211_sta_send_apinfo(sdata, ifsta);
460 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
461 struct ieee80211_if_sta *ifsta)
463 DECLARE_MAC_BUF(mac);
465 ifsta->direct_probe_tries++;
466 if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
467 printk(KERN_DEBUG "%s: direct probe to AP %s timed out\n",
468 sdata->dev->name, print_mac(mac, ifsta->bssid));
469 ifsta->state = IEEE80211_STA_MLME_DISABLED;
473 printk(KERN_DEBUG "%s: direct probe to AP %s try %d\n",
474 sdata->dev->name, print_mac(mac, ifsta->bssid),
475 ifsta->direct_probe_tries);
477 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
479 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request);
481 /* Direct probe is sent to broadcast address as some APs
482 * will not answer to direct packet in unassociated state.
484 ieee80211_send_probe_req(sdata, NULL,
485 ifsta->ssid, ifsta->ssid_len);
487 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
491 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
492 struct ieee80211_if_sta *ifsta)
494 DECLARE_MAC_BUF(mac);
497 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
498 printk(KERN_DEBUG "%s: authentication with AP %s"
500 sdata->dev->name, print_mac(mac, ifsta->bssid));
501 ifsta->state = IEEE80211_STA_MLME_DISABLED;
505 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
506 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
507 sdata->dev->name, print_mac(mac, ifsta->bssid));
509 ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
511 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
514 static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss,
515 struct ieee80211_supported_band *sband,
521 for (i = 0; i < bss->supp_rates_len; i++) {
522 int rate = (bss->supp_rates[i] & 0x7F) * 5;
524 for (j = 0; j < sband->n_bitrates; j++)
525 if (sband->bitrates[j].bitrate == rate) {
535 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
536 struct ieee80211_if_sta *ifsta)
538 struct ieee80211_local *local = sdata->local;
540 struct ieee80211_mgmt *mgmt;
541 u8 *pos, *ies, *ht_add_ie;
542 int i, len, count, rates_len, supp_rates_len;
544 struct ieee80211_sta_bss *bss;
546 struct ieee80211_supported_band *sband;
549 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
550 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
553 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
554 "frame\n", sdata->dev->name);
557 skb_reserve(skb, local->hw.extra_tx_headroom);
559 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
561 capab = ifsta->capab;
563 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
564 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
565 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
566 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
567 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
570 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
571 local->hw.conf.channel->center_freq,
572 ifsta->ssid, ifsta->ssid_len);
574 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
575 capab |= WLAN_CAPABILITY_PRIVACY;
579 /* get all rates supported by the device and the AP as
580 * some APs don't like getting a superset of their rates
581 * in the association request (e.g. D-Link DAP 1353 in
583 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
585 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
586 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
587 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
589 ieee80211_rx_bss_put(local, bss);
592 rates_len = sband->n_bitrates;
595 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
597 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
598 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
599 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
601 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
603 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
604 IEEE80211_STYPE_REASSOC_REQ);
605 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
606 mgmt->u.reassoc_req.listen_interval =
607 cpu_to_le16(local->hw.conf.listen_interval);
608 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
612 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
613 IEEE80211_STYPE_ASSOC_REQ);
614 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
615 mgmt->u.reassoc_req.listen_interval =
616 cpu_to_le16(local->hw.conf.listen_interval);
620 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
621 *pos++ = WLAN_EID_SSID;
622 *pos++ = ifsta->ssid_len;
623 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
625 /* add all rates which were marked to be used above */
626 supp_rates_len = rates_len;
627 if (supp_rates_len > 8)
630 len = sband->n_bitrates;
631 pos = skb_put(skb, supp_rates_len + 2);
632 *pos++ = WLAN_EID_SUPP_RATES;
633 *pos++ = supp_rates_len;
636 for (i = 0; i < sband->n_bitrates; i++) {
637 if (BIT(i) & rates) {
638 int rate = sband->bitrates[i].bitrate;
639 *pos++ = (u8) (rate / 5);
645 if (rates_len > count) {
646 pos = skb_put(skb, rates_len - count + 2);
647 *pos++ = WLAN_EID_EXT_SUPP_RATES;
648 *pos++ = rates_len - count;
650 for (i++; i < sband->n_bitrates; i++) {
651 if (BIT(i) & rates) {
652 int rate = sband->bitrates[i].bitrate;
653 *pos++ = (u8) (rate / 5);
658 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
659 /* 1. power capabilities */
660 pos = skb_put(skb, 4);
661 *pos++ = WLAN_EID_PWR_CAPABILITY;
663 *pos++ = 0; /* min tx power */
664 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
666 /* 2. supported channels */
667 /* TODO: get this in reg domain format */
668 pos = skb_put(skb, 2 * sband->n_channels + 2);
669 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
670 *pos++ = 2 * sband->n_channels;
671 for (i = 0; i < sband->n_channels; i++) {
672 *pos++ = ieee80211_frequency_to_channel(
673 sband->channels[i].center_freq);
674 *pos++ = 1; /* one channel in the subband*/
678 if (ifsta->extra_ie) {
679 pos = skb_put(skb, ifsta->extra_ie_len);
680 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
683 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
684 pos = skb_put(skb, 9);
685 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
686 *pos++ = 7; /* len */
687 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
690 *pos++ = 2; /* WME */
691 *pos++ = 0; /* WME info */
692 *pos++ = 1; /* WME ver */
696 /* wmm support is a must to HT */
697 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
698 sband->ht_info.ht_supported &&
699 (ht_add_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_EXTRA_INFO))) {
700 struct ieee80211_ht_addt_info *ht_add_info =
701 (struct ieee80211_ht_addt_info *)ht_add_ie;
702 u16 cap = sband->ht_info.cap;
704 u32 flags = local->hw.conf.channel->flags;
706 switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) {
707 case IEEE80211_HT_IE_CHA_SEC_ABOVE:
708 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
709 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
710 cap &= ~IEEE80211_HT_CAP_SGI_40;
713 case IEEE80211_HT_IE_CHA_SEC_BELOW:
714 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
715 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
716 cap &= ~IEEE80211_HT_CAP_SGI_40;
721 tmp = cpu_to_le16(cap);
722 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
723 *pos++ = WLAN_EID_HT_CAPABILITY;
724 *pos++ = sizeof(struct ieee80211_ht_cap);
725 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
726 memcpy(pos, &tmp, sizeof(u16));
728 /* TODO: needs a define here for << 2 */
729 *pos++ = sband->ht_info.ampdu_factor |
730 (sband->ht_info.ampdu_density << 2);
731 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
734 kfree(ifsta->assocreq_ies);
735 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
736 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
737 if (ifsta->assocreq_ies)
738 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
740 ieee80211_sta_tx(sdata, skb, 0);
744 static void ieee80211_send_deauth(struct ieee80211_sub_if_data *sdata,
745 struct ieee80211_if_sta *ifsta, u16 reason)
747 struct ieee80211_local *local = sdata->local;
749 struct ieee80211_mgmt *mgmt;
751 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
753 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
754 "frame\n", sdata->dev->name);
757 skb_reserve(skb, local->hw.extra_tx_headroom);
759 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
761 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
762 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
763 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
764 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
765 IEEE80211_STYPE_DEAUTH);
767 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
769 ieee80211_sta_tx(sdata, skb, 0);
772 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
774 if (!sdata || !sdata->default_key ||
775 sdata->default_key->conf.alg != ALG_WEP)
780 static void ieee80211_send_disassoc(struct ieee80211_sub_if_data *sdata,
781 struct ieee80211_if_sta *ifsta, u16 reason)
783 struct ieee80211_local *local = sdata->local;
785 struct ieee80211_mgmt *mgmt;
787 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
789 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
790 "frame\n", sdata->dev->name);
793 skb_reserve(skb, local->hw.extra_tx_headroom);
795 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
797 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
798 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
799 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
800 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
801 IEEE80211_STYPE_DISASSOC);
803 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
805 ieee80211_sta_tx(sdata, skb, 0);
808 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
809 struct ieee80211_if_sta *ifsta, bool deauth,
810 bool self_disconnected, u16 reason)
812 struct ieee80211_local *local = sdata->local;
813 struct sta_info *sta;
814 u32 changed = BSS_CHANGED_ASSOC;
818 sta = sta_info_get(local, ifsta->bssid);
825 ifsta->direct_probe_tries = 0;
826 ifsta->auth_tries = 0;
828 ifsta->assoc_scan_tries = 0;
829 ifsta->assoc_tries = 0;
831 netif_tx_stop_all_queues(sdata->dev);
832 netif_carrier_off(sdata->dev);
834 ieee80211_sta_tear_down_BA_sessions(sdata, sta->addr);
836 if (self_disconnected) {
838 ieee80211_send_deauth(sdata, ifsta, reason);
840 ieee80211_send_disassoc(sdata, ifsta, reason);
843 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
844 changed |= ieee80211_reset_erp_info(sdata);
846 if (sdata->bss_conf.assoc_ht)
847 changed |= BSS_CHANGED_HT;
849 sdata->bss_conf.assoc_ht = 0;
850 sdata->bss_conf.ht_conf = NULL;
851 sdata->bss_conf.ht_bss_conf = NULL;
853 ieee80211_led_assoc(local, 0);
854 sdata->bss_conf.assoc = 0;
856 ieee80211_sta_send_apinfo(sdata, ifsta);
858 if (self_disconnected)
859 ifsta->state = IEEE80211_STA_MLME_DISABLED;
861 sta_info_unlink(&sta);
865 sta_info_destroy(sta);
868 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
869 struct ieee80211_if_sta *ifsta)
871 struct ieee80211_local *local = sdata->local;
872 struct ieee80211_sta_bss *bss;
877 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
880 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
881 local->hw.conf.channel->center_freq,
882 ifsta->ssid, ifsta->ssid_len);
886 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
887 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
888 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
890 ieee80211_rx_bss_put(local, bss);
892 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
898 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
899 struct ieee80211_if_sta *ifsta)
901 DECLARE_MAC_BUF(mac);
903 ifsta->assoc_tries++;
904 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
905 printk(KERN_DEBUG "%s: association with AP %s"
907 sdata->dev->name, print_mac(mac, ifsta->bssid));
908 ifsta->state = IEEE80211_STA_MLME_DISABLED;
912 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
913 printk(KERN_DEBUG "%s: associate with AP %s\n",
914 sdata->dev->name, print_mac(mac, ifsta->bssid));
915 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
916 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
917 "mixed-cell disabled - abort association\n", sdata->dev->name);
918 ifsta->state = IEEE80211_STA_MLME_DISABLED;
922 ieee80211_send_assoc(sdata, ifsta);
924 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
928 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
929 struct ieee80211_if_sta *ifsta)
931 struct ieee80211_local *local = sdata->local;
932 struct sta_info *sta;
934 DECLARE_MAC_BUF(mac);
936 /* TODO: start monitoring current AP signal quality and number of
937 * missed beacons. Scan other channels every now and then and search
939 /* TODO: remove expired BSSes */
941 ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
945 sta = sta_info_get(local, ifsta->bssid);
947 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
948 sdata->dev->name, print_mac(mac, ifsta->bssid));
952 if (time_after(jiffies,
953 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
954 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
955 printk(KERN_DEBUG "%s: No ProbeResp from "
956 "current AP %s - assume out of "
958 sdata->dev->name, print_mac(mac, ifsta->bssid));
961 ieee80211_send_probe_req(sdata, ifsta->bssid,
963 local->scan_ssid_len);
964 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
966 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
967 if (time_after(jiffies, ifsta->last_probe +
968 IEEE80211_PROBE_INTERVAL)) {
969 ifsta->last_probe = jiffies;
970 ieee80211_send_probe_req(sdata, ifsta->bssid,
980 ieee80211_set_disassoc(sdata, ifsta, true, true,
981 WLAN_REASON_PREV_AUTH_NOT_VALID);
983 mod_timer(&ifsta->timer, jiffies +
984 IEEE80211_MONITORING_INTERVAL);
988 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
989 struct ieee80211_if_sta *ifsta)
991 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
992 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
993 ieee80211_associate(sdata, ifsta);
997 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
998 struct ieee80211_if_sta *ifsta,
999 struct ieee80211_mgmt *mgmt,
1003 struct ieee802_11_elems elems;
1005 pos = mgmt->u.auth.variable;
1006 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1007 if (!elems.challenge)
1009 ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
1010 elems.challenge_len + 2, 1);
1013 static void ieee80211_send_addba_resp(struct ieee80211_sub_if_data *sdata, u8 *da, u16 tid,
1014 u8 dialog_token, u16 status, u16 policy,
1015 u16 buf_size, u16 timeout)
1017 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1018 struct ieee80211_local *local = sdata->local;
1019 struct sk_buff *skb;
1020 struct ieee80211_mgmt *mgmt;
1023 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1026 printk(KERN_DEBUG "%s: failed to allocate buffer "
1027 "for addba resp frame\n", sdata->dev->name);
1031 skb_reserve(skb, local->hw.extra_tx_headroom);
1032 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1033 memset(mgmt, 0, 24);
1034 memcpy(mgmt->da, da, ETH_ALEN);
1035 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1036 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1037 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
1039 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1040 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1041 IEEE80211_STYPE_ACTION);
1043 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1044 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1045 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1046 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1048 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1049 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1050 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1052 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1053 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1054 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1056 ieee80211_sta_tx(sdata, skb, 0);
1062 * After accepting the AddBA Request we activated a timer,
1063 * resetting it after each frame that arrives from the originator.
1064 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1066 static void sta_rx_agg_session_timer_expired(unsigned long data)
1068 /* not an elegant detour, but there is no choice as the timer passes
1069 * only one argument, and various sta_info are needed here, so init
1070 * flow in sta_info_create gives the TID as data, while the timer_to_id
1071 * array gives the sta through container_of */
1072 u8 *ptid = (u8 *)data;
1073 u8 *timer_to_id = ptid - *ptid;
1074 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1077 #ifdef CONFIG_MAC80211_HT_DEBUG
1078 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1080 ieee80211_sta_stop_rx_ba_session(sta->sdata, sta->addr,
1081 (u16)*ptid, WLAN_BACK_TIMER,
1082 WLAN_REASON_QSTA_TIMEOUT);
1085 static void ieee80211_sta_process_addba_request(struct ieee80211_local *local,
1086 struct ieee80211_mgmt *mgmt,
1089 struct ieee80211_hw *hw = &local->hw;
1090 struct ieee80211_conf *conf = &hw->conf;
1091 struct sta_info *sta;
1092 struct tid_ampdu_rx *tid_agg_rx;
1093 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1095 int ret = -EOPNOTSUPP;
1096 DECLARE_MAC_BUF(mac);
1100 sta = sta_info_get(local, mgmt->sa);
1106 /* extract session parameters from addba request frame */
1107 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1108 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1110 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1112 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1113 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1114 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1115 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1117 status = WLAN_STATUS_REQUEST_DECLINED;
1119 /* sanity check for incoming parameters:
1120 * check if configuration can support the BA policy
1121 * and if buffer size does not exceeds max value */
1122 if (((ba_policy != 1)
1123 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1124 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1125 status = WLAN_STATUS_INVALID_QOS_PARAM;
1126 #ifdef CONFIG_MAC80211_HT_DEBUG
1127 if (net_ratelimit())
1128 printk(KERN_DEBUG "AddBA Req with bad params from "
1129 "%s on tid %u. policy %d, buffer size %d\n",
1130 print_mac(mac, mgmt->sa), tid, ba_policy,
1132 #endif /* CONFIG_MAC80211_HT_DEBUG */
1135 /* determine default buffer size */
1136 if (buf_size == 0) {
1137 struct ieee80211_supported_band *sband;
1139 sband = local->hw.wiphy->bands[conf->channel->band];
1140 buf_size = IEEE80211_MIN_AMPDU_BUF;
1141 buf_size = buf_size << sband->ht_info.ampdu_factor;
1145 /* examine state machine */
1146 spin_lock_bh(&sta->lock);
1148 if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
1149 #ifdef CONFIG_MAC80211_HT_DEBUG
1150 if (net_ratelimit())
1151 printk(KERN_DEBUG "unexpected AddBA Req from "
1153 print_mac(mac, mgmt->sa), tid);
1154 #endif /* CONFIG_MAC80211_HT_DEBUG */
1158 /* prepare A-MPDU MLME for Rx aggregation */
1159 sta->ampdu_mlme.tid_rx[tid] =
1160 kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1161 if (!sta->ampdu_mlme.tid_rx[tid]) {
1162 #ifdef CONFIG_MAC80211_HT_DEBUG
1163 if (net_ratelimit())
1164 printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1170 sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1171 sta_rx_agg_session_timer_expired;
1172 sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1173 (unsigned long)&sta->timer_to_tid[tid];
1174 init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1176 tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1178 /* prepare reordering buffer */
1179 tid_agg_rx->reorder_buf =
1180 kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC);
1181 if (!tid_agg_rx->reorder_buf) {
1182 #ifdef CONFIG_MAC80211_HT_DEBUG
1183 if (net_ratelimit())
1184 printk(KERN_ERR "can not allocate reordering buffer "
1185 "to tid %d\n", tid);
1187 kfree(sta->ampdu_mlme.tid_rx[tid]);
1190 memset(tid_agg_rx->reorder_buf, 0,
1191 buf_size * sizeof(struct sk_buff *));
1193 if (local->ops->ampdu_action)
1194 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1195 sta->addr, tid, &start_seq_num);
1196 #ifdef CONFIG_MAC80211_HT_DEBUG
1197 printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
1198 #endif /* CONFIG_MAC80211_HT_DEBUG */
1201 kfree(tid_agg_rx->reorder_buf);
1203 sta->ampdu_mlme.tid_rx[tid] = NULL;
1207 /* change state and send addba resp */
1208 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
1209 tid_agg_rx->dialog_token = dialog_token;
1210 tid_agg_rx->ssn = start_seq_num;
1211 tid_agg_rx->head_seq_num = start_seq_num;
1212 tid_agg_rx->buf_size = buf_size;
1213 tid_agg_rx->timeout = timeout;
1214 tid_agg_rx->stored_mpdu_num = 0;
1215 status = WLAN_STATUS_SUCCESS;
1217 spin_unlock_bh(&sta->lock);
1220 ieee80211_send_addba_resp(sta->sdata, sta->addr, tid,
1221 dialog_token, status, 1, buf_size, timeout);
1225 static void ieee80211_sta_process_addba_resp(struct ieee80211_local *local,
1226 struct ieee80211_mgmt *mgmt,
1229 struct ieee80211_hw *hw = &local->hw;
1230 struct sta_info *sta;
1237 sta = sta_info_get(local, mgmt->sa);
1243 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1244 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1246 state = &sta->ampdu_mlme.tid_state_tx[tid];
1248 spin_lock_bh(&sta->lock);
1250 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1251 spin_unlock_bh(&sta->lock);
1252 goto addba_resp_exit;
1255 if (mgmt->u.action.u.addba_resp.dialog_token !=
1256 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
1257 spin_unlock_bh(&sta->lock);
1258 #ifdef CONFIG_MAC80211_HT_DEBUG
1259 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1260 #endif /* CONFIG_MAC80211_HT_DEBUG */
1261 goto addba_resp_exit;
1264 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
1265 #ifdef CONFIG_MAC80211_HT_DEBUG
1266 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1267 #endif /* CONFIG_MAC80211_HT_DEBUG */
1268 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1269 == WLAN_STATUS_SUCCESS) {
1270 *state |= HT_ADDBA_RECEIVED_MSK;
1271 sta->ampdu_mlme.addba_req_num[tid] = 0;
1273 if (*state == HT_AGG_STATE_OPERATIONAL)
1274 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1276 spin_unlock_bh(&sta->lock);
1278 sta->ampdu_mlme.addba_req_num[tid]++;
1279 /* this will allow the state check in stop_BA_session */
1280 *state = HT_AGG_STATE_OPERATIONAL;
1281 spin_unlock_bh(&sta->lock);
1282 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1283 WLAN_BACK_INITIATOR);
1290 static void ieee80211_sta_process_delba(struct ieee80211_sub_if_data *sdata,
1291 struct ieee80211_mgmt *mgmt, size_t len)
1293 struct ieee80211_local *local = sdata->local;
1294 struct sta_info *sta;
1297 DECLARE_MAC_BUF(mac);
1301 sta = sta_info_get(local, mgmt->sa);
1307 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1308 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1309 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1311 #ifdef CONFIG_MAC80211_HT_DEBUG
1312 if (net_ratelimit())
1313 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1314 print_mac(mac, mgmt->sa),
1315 initiator ? "initiator" : "recipient", tid,
1316 mgmt->u.action.u.delba.reason_code);
1317 #endif /* CONFIG_MAC80211_HT_DEBUG */
1319 if (initiator == WLAN_BACK_INITIATOR)
1320 ieee80211_sta_stop_rx_ba_session(sdata, sta->addr, tid,
1321 WLAN_BACK_INITIATOR, 0);
1322 else { /* WLAN_BACK_RECIPIENT */
1323 spin_lock_bh(&sta->lock);
1324 sta->ampdu_mlme.tid_state_tx[tid] =
1325 HT_AGG_STATE_OPERATIONAL;
1326 spin_unlock_bh(&sta->lock);
1327 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1328 WLAN_BACK_RECIPIENT);
1333 static void ieee80211_send_refuse_measurement_request(struct ieee80211_sub_if_data *sdata,
1334 struct ieee80211_msrment_ie *request_ie,
1335 const u8 *da, const u8 *bssid,
1338 struct ieee80211_local *local = sdata->local;
1339 struct sk_buff *skb;
1340 struct ieee80211_mgmt *msr_report;
1342 skb = dev_alloc_skb(sizeof(*msr_report) + local->hw.extra_tx_headroom +
1343 sizeof(struct ieee80211_msrment_ie));
1346 printk(KERN_ERR "%s: failed to allocate buffer for "
1347 "measurement report frame\n", sdata->dev->name);
1351 skb_reserve(skb, local->hw.extra_tx_headroom);
1352 msr_report = (struct ieee80211_mgmt *)skb_put(skb, 24);
1353 memset(msr_report, 0, 24);
1354 memcpy(msr_report->da, da, ETH_ALEN);
1355 memcpy(msr_report->sa, sdata->dev->dev_addr, ETH_ALEN);
1356 memcpy(msr_report->bssid, bssid, ETH_ALEN);
1357 msr_report->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1358 IEEE80211_STYPE_ACTION);
1360 skb_put(skb, 1 + sizeof(msr_report->u.action.u.measurement));
1361 msr_report->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
1362 msr_report->u.action.u.measurement.action_code =
1363 WLAN_ACTION_SPCT_MSR_RPRT;
1364 msr_report->u.action.u.measurement.dialog_token = dialog_token;
1366 msr_report->u.action.u.measurement.element_id = WLAN_EID_MEASURE_REPORT;
1367 msr_report->u.action.u.measurement.length =
1368 sizeof(struct ieee80211_msrment_ie);
1370 memset(&msr_report->u.action.u.measurement.msr_elem, 0,
1371 sizeof(struct ieee80211_msrment_ie));
1372 msr_report->u.action.u.measurement.msr_elem.token = request_ie->token;
1373 msr_report->u.action.u.measurement.msr_elem.mode |=
1374 IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED;
1375 msr_report->u.action.u.measurement.msr_elem.type = request_ie->type;
1377 ieee80211_sta_tx(sdata, skb, 0);
1380 static void ieee80211_sta_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1381 struct ieee80211_mgmt *mgmt,
1385 * Ignoring measurement request is spec violation.
1386 * Mandatory measurements must be reported optional
1387 * measurements might be refused or reported incapable
1388 * For now just refuse
1389 * TODO: Answer basic measurement as unmeasured
1391 ieee80211_send_refuse_measurement_request(sdata,
1392 &mgmt->u.action.u.measurement.msr_elem,
1393 mgmt->sa, mgmt->bssid,
1394 mgmt->u.action.u.measurement.dialog_token);
1398 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1399 struct ieee80211_if_sta *ifsta,
1400 struct ieee80211_mgmt *mgmt,
1403 u16 auth_alg, auth_transaction, status_code;
1404 DECLARE_MAC_BUF(mac);
1406 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
1407 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
1413 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1414 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1417 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1418 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1421 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1422 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1423 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1425 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1427 * IEEE 802.11 standard does not require authentication in IBSS
1428 * networks and most implementations do not seem to use it.
1429 * However, try to reply to authentication attempts if someone
1430 * has actually implemented this.
1432 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
1434 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
1437 if (auth_alg != ifsta->auth_alg ||
1438 auth_transaction != ifsta->auth_transaction)
1441 if (status_code != WLAN_STATUS_SUCCESS) {
1442 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1444 const int num_algs = ARRAY_SIZE(algs);
1446 algs[0] = algs[1] = algs[2] = 0xff;
1447 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1448 algs[0] = WLAN_AUTH_OPEN;
1449 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1450 algs[1] = WLAN_AUTH_SHARED_KEY;
1451 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1452 algs[2] = WLAN_AUTH_LEAP;
1453 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1455 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1459 for (i = 0; i < num_algs; i++) {
1461 if (pos >= num_algs)
1463 if (algs[pos] == ifsta->auth_alg ||
1466 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1467 !ieee80211_sta_wep_configured(sdata))
1469 ifsta->auth_alg = algs[pos];
1476 switch (ifsta->auth_alg) {
1477 case WLAN_AUTH_OPEN:
1478 case WLAN_AUTH_LEAP:
1479 ieee80211_auth_completed(sdata, ifsta);
1481 case WLAN_AUTH_SHARED_KEY:
1482 if (ifsta->auth_transaction == 4)
1483 ieee80211_auth_completed(sdata, ifsta);
1485 ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
1491 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1492 struct ieee80211_if_sta *ifsta,
1493 struct ieee80211_mgmt *mgmt,
1497 DECLARE_MAC_BUF(mac);
1502 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1505 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1507 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
1508 printk(KERN_DEBUG "%s: deauthenticated\n", sdata->dev->name);
1510 if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1511 ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
1512 ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1513 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1514 mod_timer(&ifsta->timer, jiffies +
1515 IEEE80211_RETRY_AUTH_INTERVAL);
1518 ieee80211_set_disassoc(sdata, ifsta, true, false, 0);
1519 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1523 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1524 struct ieee80211_if_sta *ifsta,
1525 struct ieee80211_mgmt *mgmt,
1529 DECLARE_MAC_BUF(mac);
1534 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1537 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1539 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1540 printk(KERN_DEBUG "%s: disassociated\n", sdata->dev->name);
1542 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1543 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
1544 mod_timer(&ifsta->timer, jiffies +
1545 IEEE80211_RETRY_AUTH_INTERVAL);
1548 ieee80211_set_disassoc(sdata, ifsta, false, false, 0);
1552 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1553 struct ieee80211_if_sta *ifsta,
1554 struct ieee80211_mgmt *mgmt,
1558 struct ieee80211_local *local = sdata->local;
1559 struct ieee80211_supported_band *sband;
1560 struct sta_info *sta;
1561 u64 rates, basic_rates;
1562 u16 capab_info, status_code, aid;
1563 struct ieee802_11_elems elems;
1564 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1567 DECLARE_MAC_BUF(mac);
1568 bool have_higher_than_11mbit = false;
1570 /* AssocResp and ReassocResp have identical structure, so process both
1571 * of them in this function. */
1573 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
1579 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1582 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1583 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1584 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1586 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1587 "status=%d aid=%d)\n",
1588 sdata->dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1589 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1591 if (status_code != WLAN_STATUS_SUCCESS) {
1592 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1593 sdata->dev->name, status_code);
1594 /* if this was a reassociation, ensure we try a "full"
1595 * association next time. This works around some broken APs
1596 * which do not correctly reject reassociation requests. */
1597 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1601 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1602 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1603 "set\n", sdata->dev->name, aid);
1604 aid &= ~(BIT(15) | BIT(14));
1606 pos = mgmt->u.assoc_resp.variable;
1607 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1609 if (!elems.supp_rates) {
1610 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1615 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1617 ifsta->ap_capab = capab_info;
1619 kfree(ifsta->assocresp_ies);
1620 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1621 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1622 if (ifsta->assocresp_ies)
1623 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1627 /* Add STA entry for the AP */
1628 sta = sta_info_get(local, ifsta->bssid);
1630 struct ieee80211_sta_bss *bss;
1633 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1635 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1636 " the AP\n", sdata->dev->name);
1640 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
1641 local->hw.conf.channel->center_freq,
1642 ifsta->ssid, ifsta->ssid_len);
1644 sta->last_signal = bss->signal;
1645 sta->last_qual = bss->qual;
1646 sta->last_noise = bss->noise;
1647 ieee80211_rx_bss_put(local, bss);
1650 err = sta_info_insert(sta);
1652 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1653 " the AP (error %d)\n", sdata->dev->name, err);
1657 /* update new sta with its last rx activity */
1658 sta->last_rx = jiffies;
1662 * FIXME: Do we really need to update the sta_info's information here?
1663 * We already know about the AP (we found it in our list) so it
1664 * should already be filled with the right info, no?
1665 * As is stands, all this is racy because typically we assume
1666 * the information that is filled in here (except flags) doesn't
1667 * change while a STA structure is alive. As such, it should move
1668 * to between the sta_info_alloc() and sta_info_insert() above.
1671 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1672 WLAN_STA_AUTHORIZED);
1676 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1678 for (i = 0; i < elems.supp_rates_len; i++) {
1679 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1682 have_higher_than_11mbit = true;
1684 for (j = 0; j < sband->n_bitrates; j++) {
1685 if (sband->bitrates[j].bitrate == rate)
1687 if (elems.supp_rates[i] & 0x80)
1688 basic_rates |= BIT(j);
1692 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1693 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1696 have_higher_than_11mbit = true;
1698 for (j = 0; j < sband->n_bitrates; j++) {
1699 if (sband->bitrates[j].bitrate == rate)
1701 if (elems.ext_supp_rates[i] & 0x80)
1702 basic_rates |= BIT(j);
1706 sta->supp_rates[local->hw.conf.channel->band] = rates;
1707 sdata->basic_rates = basic_rates;
1709 /* cf. IEEE 802.11 9.2.12 */
1710 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1711 have_higher_than_11mbit)
1712 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1714 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1716 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1717 (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
1718 struct ieee80211_ht_bss_info bss_info;
1719 ieee80211_ht_cap_ie_to_ht_info(
1720 (struct ieee80211_ht_cap *)
1721 elems.ht_cap_elem, &sta->ht_info);
1722 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1723 (struct ieee80211_ht_addt_info *)
1724 elems.ht_info_elem, &bss_info);
1725 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
1728 rate_control_rate_init(sta, local);
1730 if (elems.wmm_param) {
1731 set_sta_flags(sta, WLAN_STA_WME);
1733 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1734 elems.wmm_param_len);
1738 /* set AID and assoc capability,
1739 * ieee80211_set_associated() will tell the driver */
1740 bss_conf->aid = aid;
1741 bss_conf->assoc_capability = capab_info;
1742 ieee80211_set_associated(sdata, ifsta);
1744 ieee80211_associated(sdata, ifsta);
1748 static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
1749 struct ieee80211_if_sta *ifsta,
1750 struct ieee80211_sta_bss *bss)
1752 struct ieee80211_local *local = sdata->local;
1753 int res, rates, i, j;
1754 struct sk_buff *skb;
1755 struct ieee80211_mgmt *mgmt;
1757 struct ieee80211_supported_band *sband;
1758 union iwreq_data wrqu;
1760 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1762 /* Remove possible STA entries from other IBSS networks. */
1763 sta_info_flush_delayed(sdata);
1765 if (local->ops->reset_tsf) {
1766 /* Reset own TSF to allow time synchronization work. */
1767 local->ops->reset_tsf(local_to_hw(local));
1769 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
1770 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
1774 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
1776 sdata->drop_unencrypted = bss->capability &
1777 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
1779 res = ieee80211_set_freq(sdata, bss->freq);
1784 /* Build IBSS probe response */
1785 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
1787 skb_reserve(skb, local->hw.extra_tx_headroom);
1789 mgmt = (struct ieee80211_mgmt *)
1790 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
1791 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
1792 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1793 IEEE80211_STYPE_PROBE_RESP);
1794 memset(mgmt->da, 0xff, ETH_ALEN);
1795 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1796 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1797 mgmt->u.beacon.beacon_int =
1798 cpu_to_le16(local->hw.conf.beacon_int);
1799 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
1800 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
1802 pos = skb_put(skb, 2 + ifsta->ssid_len);
1803 *pos++ = WLAN_EID_SSID;
1804 *pos++ = ifsta->ssid_len;
1805 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
1807 rates = bss->supp_rates_len;
1810 pos = skb_put(skb, 2 + rates);
1811 *pos++ = WLAN_EID_SUPP_RATES;
1813 memcpy(pos, bss->supp_rates, rates);
1815 if (bss->band == IEEE80211_BAND_2GHZ) {
1816 pos = skb_put(skb, 2 + 1);
1817 *pos++ = WLAN_EID_DS_PARAMS;
1819 *pos++ = ieee80211_frequency_to_channel(bss->freq);
1822 pos = skb_put(skb, 2 + 2);
1823 *pos++ = WLAN_EID_IBSS_PARAMS;
1825 /* FIX: set ATIM window based on scan results */
1829 if (bss->supp_rates_len > 8) {
1830 rates = bss->supp_rates_len - 8;
1831 pos = skb_put(skb, 2 + rates);
1832 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1834 memcpy(pos, &bss->supp_rates[8], rates);
1837 ifsta->probe_resp = skb;
1839 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
1843 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1844 for (i = 0; i < bss->supp_rates_len; i++) {
1845 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
1846 for (j = 0; j < sband->n_bitrates; j++)
1847 if (sband->bitrates[j].bitrate == bitrate)
1850 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
1852 ieee80211_sta_def_wmm_params(sdata, bss, 1);
1854 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
1855 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1857 memset(&wrqu, 0, sizeof(wrqu));
1858 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
1859 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
1864 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
1865 struct ieee802_11_elems *elems,
1866 enum ieee80211_band band)
1868 struct ieee80211_supported_band *sband;
1869 struct ieee80211_rate *bitrates;
1873 sband = local->hw.wiphy->bands[band];
1877 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1880 bitrates = sband->bitrates;
1881 num_rates = sband->n_bitrates;
1883 for (i = 0; i < elems->supp_rates_len +
1884 elems->ext_supp_rates_len; i++) {
1887 if (i < elems->supp_rates_len)
1888 rate = elems->supp_rates[i];
1889 else if (elems->ext_supp_rates)
1890 rate = elems->ext_supp_rates
1891 [i - elems->supp_rates_len];
1892 own_rate = 5 * (rate & 0x7f);
1893 for (j = 0; j < num_rates; j++)
1894 if (bitrates[j].bitrate == own_rate)
1895 supp_rates |= BIT(j);
1900 static u64 ieee80211_sta_get_mandatory_rates(struct ieee80211_local *local,
1901 enum ieee80211_band band)
1903 struct ieee80211_supported_band *sband;
1904 struct ieee80211_rate *bitrates;
1905 u64 mandatory_rates;
1906 enum ieee80211_rate_flags mandatory_flag;
1909 sband = local->hw.wiphy->bands[band];
1912 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1915 if (band == IEEE80211_BAND_2GHZ)
1916 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
1918 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
1920 bitrates = sband->bitrates;
1921 mandatory_rates = 0;
1922 for (i = 0; i < sband->n_bitrates; i++)
1923 if (bitrates[i].flags & mandatory_flag)
1924 mandatory_rates |= BIT(i);
1925 return mandatory_rates;
1928 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1929 struct ieee80211_mgmt *mgmt,
1931 struct ieee80211_rx_status *rx_status,
1932 struct ieee802_11_elems *elems,
1935 struct ieee80211_local *local = sdata->local;
1937 struct ieee80211_sta_bss *bss;
1938 struct sta_info *sta;
1939 struct ieee80211_channel *channel;
1940 u64 beacon_timestamp, rx_timestamp;
1942 enum ieee80211_band band = rx_status->band;
1943 DECLARE_MAC_BUF(mac);
1944 DECLARE_MAC_BUF(mac2);
1946 if (elems->ds_params && elems->ds_params_len == 1)
1947 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1949 freq = rx_status->freq;
1951 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1953 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1956 if (ieee80211_vif_is_mesh(&sdata->vif) && elems->mesh_id &&
1957 elems->mesh_config && mesh_matches_local(elems, sdata)) {
1958 supp_rates = ieee80211_sta_get_rates(local, elems, band);
1960 mesh_neighbour_update(mgmt->sa, supp_rates, sdata,
1961 mesh_peer_accepts_plinks(elems));
1964 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems->supp_rates &&
1965 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1966 supp_rates = ieee80211_sta_get_rates(local, elems, band);
1970 sta = sta_info_get(local, mgmt->sa);
1974 prev_rates = sta->supp_rates[band];
1975 /* make sure mandatory rates are always added */
1976 sta->supp_rates[band] = supp_rates |
1977 ieee80211_sta_get_mandatory_rates(local, band);
1979 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1980 if (sta->supp_rates[band] != prev_rates)
1981 printk(KERN_DEBUG "%s: updated supp_rates set "
1982 "for %s based on beacon info (0x%llx | "
1983 "0x%llx -> 0x%llx)\n",
1984 sdata->dev->name, print_mac(mac, sta->addr),
1985 (unsigned long long) prev_rates,
1986 (unsigned long long) supp_rates,
1987 (unsigned long long) sta->supp_rates[band]);
1990 ieee80211_ibss_add_sta(sdata, NULL, mgmt->bssid,
1991 mgmt->sa, supp_rates);
1997 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2002 /* was just updated in ieee80211_bss_info_update */
2003 beacon_timestamp = bss->timestamp;
2006 * In STA mode, the remaining parameters should not be overridden
2007 * by beacons because they're not necessarily accurate there.
2009 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2010 bss->last_probe_resp && beacon) {
2011 ieee80211_rx_bss_put(local, bss);
2015 /* check if we need to merge IBSS */
2016 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2017 bss->capability & WLAN_CAPABILITY_IBSS &&
2018 bss->freq == local->oper_channel->center_freq &&
2019 elems->ssid_len == sdata->u.sta.ssid_len &&
2020 memcmp(elems->ssid, sdata->u.sta.ssid,
2021 sdata->u.sta.ssid_len) == 0) {
2022 if (rx_status->flag & RX_FLAG_TSFT) {
2023 /* in order for correct IBSS merging we need mactime
2025 * since mactime is defined as the time the first data
2026 * symbol of the frame hits the PHY, and the timestamp
2027 * of the beacon is defined as "the time that the data
2028 * symbol containing the first bit of the timestamp is
2029 * transmitted to the PHY plus the transmitting STA’s
2030 * delays through its local PHY from the MAC-PHY
2031 * interface to its interface with the WM"
2032 * (802.11 11.1.2) - equals the time this bit arrives at
2033 * the receiver - we have to take into account the
2034 * offset between the two.
2035 * e.g: at 1 MBit that means mactime is 192 usec earlier
2036 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2038 int rate = local->hw.wiphy->bands[band]->
2039 bitrates[rx_status->rate_idx].bitrate;
2040 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2041 } else if (local && local->ops && local->ops->get_tsf)
2042 /* second best option: get current TSF */
2043 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2045 /* can't merge without knowing the TSF */
2046 rx_timestamp = -1LLU;
2047 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2048 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2049 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2050 print_mac(mac, mgmt->sa),
2051 print_mac(mac2, mgmt->bssid),
2052 (unsigned long long)rx_timestamp,
2053 (unsigned long long)beacon_timestamp,
2054 (unsigned long long)(rx_timestamp - beacon_timestamp),
2056 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2057 if (beacon_timestamp > rx_timestamp) {
2058 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2059 printk(KERN_DEBUG "%s: beacon TSF higher than "
2060 "local TSF - IBSS merge with BSSID %s\n",
2061 sdata->dev->name, print_mac(mac, mgmt->bssid));
2063 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
2064 ieee80211_ibss_add_sta(sdata, NULL,
2065 mgmt->bssid, mgmt->sa,
2070 ieee80211_rx_bss_put(local, bss);
2074 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2075 struct ieee80211_mgmt *mgmt,
2077 struct ieee80211_rx_status *rx_status)
2080 struct ieee802_11_elems elems;
2081 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2083 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
2084 return; /* ignore ProbeResp to foreign address */
2086 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2090 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2093 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
2095 /* direct probe may be part of the association flow */
2096 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
2098 printk(KERN_DEBUG "%s direct probe responded\n",
2100 ieee80211_authenticate(sdata, ifsta);
2105 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2106 struct ieee80211_mgmt *mgmt,
2108 struct ieee80211_rx_status *rx_status)
2110 struct ieee80211_if_sta *ifsta;
2112 struct ieee802_11_elems elems;
2113 struct ieee80211_local *local = sdata->local;
2114 struct ieee80211_conf *conf = &local->hw.conf;
2117 /* Process beacon from the current BSS */
2118 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2122 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2124 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
2126 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2128 ifsta = &sdata->u.sta;
2130 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2131 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2134 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
2135 elems.wmm_param_len);
2137 if (elems.erp_info && elems.erp_info_len >= 1)
2138 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2140 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
2141 changed |= ieee80211_handle_protect_preamb(sdata, false,
2142 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
2145 if (elems.ht_cap_elem && elems.ht_info_elem &&
2146 elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2147 struct ieee80211_ht_bss_info bss_info;
2149 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2150 (struct ieee80211_ht_addt_info *)
2151 elems.ht_info_elem, &bss_info);
2152 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2156 ieee80211_bss_info_change_notify(sdata, changed);
2160 static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
2161 struct ieee80211_if_sta *ifsta,
2162 struct ieee80211_mgmt *mgmt,
2164 struct ieee80211_rx_status *rx_status)
2166 struct ieee80211_local *local = sdata->local;
2168 struct sk_buff *skb;
2169 struct ieee80211_mgmt *resp;
2171 DECLARE_MAC_BUF(mac);
2172 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2173 DECLARE_MAC_BUF(mac2);
2174 DECLARE_MAC_BUF(mac3);
2177 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2178 ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
2179 len < 24 + 2 || !ifsta->probe_resp)
2182 if (local->ops->tx_last_beacon)
2183 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2187 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2188 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2189 "%s (tx_last_beacon=%d)\n",
2190 sdata->dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2191 print_mac(mac3, mgmt->bssid), tx_last_beacon);
2192 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2194 if (!tx_last_beacon)
2197 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2198 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2201 end = ((u8 *) mgmt) + len;
2202 pos = mgmt->u.probe_req.variable;
2203 if (pos[0] != WLAN_EID_SSID ||
2204 pos + 2 + pos[1] > end) {
2205 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2206 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2208 sdata->dev->name, print_mac(mac, mgmt->sa));
2213 (pos[1] != ifsta->ssid_len ||
2214 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2215 /* Ignore ProbeReq for foreign SSID */
2219 /* Reply with ProbeResp */
2220 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
2224 resp = (struct ieee80211_mgmt *) skb->data;
2225 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2226 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2227 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2228 sdata->dev->name, print_mac(mac, resp->da));
2229 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2230 ieee80211_sta_tx(sdata, skb, 0);
2233 static void ieee80211_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
2234 struct ieee80211_if_sta *ifsta,
2235 struct ieee80211_mgmt *mgmt,
2237 struct ieee80211_rx_status *rx_status)
2239 struct ieee80211_local *local = sdata->local;
2241 /* all categories we currently handle have action_code */
2242 if (len < IEEE80211_MIN_ACTION_SIZE + 1)
2245 switch (mgmt->u.action.category) {
2246 case WLAN_CATEGORY_SPECTRUM_MGMT:
2247 if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ)
2249 switch (mgmt->u.action.u.measurement.action_code) {
2250 case WLAN_ACTION_SPCT_MSR_REQ:
2251 if (len < (IEEE80211_MIN_ACTION_SIZE +
2252 sizeof(mgmt->u.action.u.measurement)))
2254 ieee80211_sta_process_measurement_req(sdata, mgmt, len);
2258 case WLAN_CATEGORY_BACK:
2259 switch (mgmt->u.action.u.addba_req.action_code) {
2260 case WLAN_ACTION_ADDBA_REQ:
2261 if (len < (IEEE80211_MIN_ACTION_SIZE +
2262 sizeof(mgmt->u.action.u.addba_req)))
2264 ieee80211_sta_process_addba_request(local, mgmt, len);
2266 case WLAN_ACTION_ADDBA_RESP:
2267 if (len < (IEEE80211_MIN_ACTION_SIZE +
2268 sizeof(mgmt->u.action.u.addba_resp)))
2270 ieee80211_sta_process_addba_resp(local, mgmt, len);
2272 case WLAN_ACTION_DELBA:
2273 if (len < (IEEE80211_MIN_ACTION_SIZE +
2274 sizeof(mgmt->u.action.u.delba)))
2276 ieee80211_sta_process_delba(sdata, mgmt, len);
2280 case PLINK_CATEGORY:
2281 if (ieee80211_vif_is_mesh(&sdata->vif))
2282 mesh_rx_plink_frame(sdata, mgmt, len, rx_status);
2284 case MESH_PATH_SEL_CATEGORY:
2285 if (ieee80211_vif_is_mesh(&sdata->vif))
2286 mesh_rx_path_sel_frame(sdata, mgmt, len);
2291 void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
2292 struct ieee80211_rx_status *rx_status)
2294 struct ieee80211_local *local = sdata->local;
2295 struct ieee80211_if_sta *ifsta;
2296 struct ieee80211_mgmt *mgmt;
2302 ifsta = &sdata->u.sta;
2304 mgmt = (struct ieee80211_mgmt *) skb->data;
2305 fc = le16_to_cpu(mgmt->frame_control);
2307 switch (fc & IEEE80211_FCTL_STYPE) {
2308 case IEEE80211_STYPE_PROBE_REQ:
2309 case IEEE80211_STYPE_PROBE_RESP:
2310 case IEEE80211_STYPE_BEACON:
2311 case IEEE80211_STYPE_ACTION:
2312 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2313 case IEEE80211_STYPE_AUTH:
2314 case IEEE80211_STYPE_ASSOC_RESP:
2315 case IEEE80211_STYPE_REASSOC_RESP:
2316 case IEEE80211_STYPE_DEAUTH:
2317 case IEEE80211_STYPE_DISASSOC:
2318 skb_queue_tail(&ifsta->skb_queue, skb);
2319 queue_work(local->hw.workqueue, &ifsta->work);
2327 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2328 struct sk_buff *skb)
2330 struct ieee80211_rx_status *rx_status;
2331 struct ieee80211_if_sta *ifsta;
2332 struct ieee80211_mgmt *mgmt;
2335 ifsta = &sdata->u.sta;
2337 rx_status = (struct ieee80211_rx_status *) skb->cb;
2338 mgmt = (struct ieee80211_mgmt *) skb->data;
2339 fc = le16_to_cpu(mgmt->frame_control);
2341 switch (fc & IEEE80211_FCTL_STYPE) {
2342 case IEEE80211_STYPE_PROBE_REQ:
2343 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len,
2346 case IEEE80211_STYPE_PROBE_RESP:
2347 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
2349 case IEEE80211_STYPE_BEACON:
2350 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2352 case IEEE80211_STYPE_AUTH:
2353 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
2355 case IEEE80211_STYPE_ASSOC_RESP:
2356 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
2358 case IEEE80211_STYPE_REASSOC_RESP:
2359 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
2361 case IEEE80211_STYPE_DEAUTH:
2362 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
2364 case IEEE80211_STYPE_DISASSOC:
2365 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
2367 case IEEE80211_STYPE_ACTION:
2368 ieee80211_rx_mgmt_action(sdata, ifsta, mgmt, skb->len, rx_status);
2376 static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
2378 struct ieee80211_local *local = sdata->local;
2380 struct sta_info *sta;
2384 list_for_each_entry_rcu(sta, &local->sta_list, list) {
2385 if (sta->sdata == sdata &&
2386 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2399 static void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, unsigned long exp_time)
2401 struct ieee80211_local *local = sdata->local;
2402 struct sta_info *sta, *tmp;
2403 LIST_HEAD(tmp_list);
2404 DECLARE_MAC_BUF(mac);
2405 unsigned long flags;
2407 spin_lock_irqsave(&local->sta_lock, flags);
2408 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
2409 if (time_after(jiffies, sta->last_rx + exp_time)) {
2410 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2411 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
2412 sdata->dev->name, print_mac(mac, sta->addr));
2414 __sta_info_unlink(&sta);
2416 list_add(&sta->list, &tmp_list);
2418 spin_unlock_irqrestore(&local->sta_lock, flags);
2420 list_for_each_entry_safe(sta, tmp, &tmp_list, list)
2421 sta_info_destroy(sta);
2425 static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
2426 struct ieee80211_if_sta *ifsta)
2428 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2430 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
2431 if (ieee80211_sta_active_ibss(sdata))
2434 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
2435 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
2436 ieee80211_sta_req_scan(sdata, ifsta->ssid, ifsta->ssid_len);
2440 #ifdef CONFIG_MAC80211_MESH
2441 static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata,
2442 struct ieee80211_if_sta *ifsta)
2446 ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
2447 mesh_path_expire(sdata);
2449 free_plinks = mesh_plink_availables(sdata);
2450 if (free_plinks != sdata->u.sta.accepting_plinks)
2451 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
2453 mod_timer(&ifsta->timer, jiffies +
2454 IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
2458 void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
2460 struct ieee80211_if_sta *ifsta;
2461 ifsta = &sdata->u.sta;
2462 ifsta->state = IEEE80211_STA_MLME_MESH_UP;
2463 ieee80211_sta_timer((unsigned long)sdata);
2464 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
2469 void ieee80211_sta_timer(unsigned long data)
2471 struct ieee80211_sub_if_data *sdata =
2472 (struct ieee80211_sub_if_data *) data;
2473 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2474 struct ieee80211_local *local = sdata->local;
2476 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2477 queue_work(local->hw.workqueue, &ifsta->work);
2480 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
2481 struct ieee80211_if_sta *ifsta)
2483 struct ieee80211_local *local = sdata->local;
2485 if (local->ops->reset_tsf) {
2486 /* Reset own TSF to allow time synchronization work. */
2487 local->ops->reset_tsf(local_to_hw(local));
2490 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2493 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2494 ifsta->auth_alg = WLAN_AUTH_OPEN;
2495 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2496 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2497 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2498 ifsta->auth_alg = WLAN_AUTH_LEAP;
2500 ifsta->auth_alg = WLAN_AUTH_OPEN;
2501 ifsta->auth_transaction = -1;
2502 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
2503 ifsta->assoc_scan_tries = 0;
2504 ifsta->direct_probe_tries = 0;
2505 ifsta->auth_tries = 0;
2506 ifsta->assoc_tries = 0;
2507 netif_tx_stop_all_queues(sdata->dev);
2508 netif_carrier_off(sdata->dev);
2512 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
2513 struct ieee80211_if_sta *ifsta)
2515 struct ieee80211_local *local = sdata->local;
2517 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2520 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2521 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2522 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2523 IEEE80211_STA_AUTO_SSID_SEL))) {
2525 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED)
2526 ieee80211_set_disassoc(sdata, ifsta, true, true,
2527 WLAN_REASON_DEAUTH_LEAVING);
2529 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2530 queue_work(local->hw.workqueue, &ifsta->work);
2534 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2535 const char *ssid, int ssid_len)
2537 int tmp, hidden_ssid;
2539 if (ssid_len == ifsta->ssid_len &&
2540 !memcmp(ifsta->ssid, ssid, ssid_len))
2543 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2549 if (ssid[tmp] != '\0') {
2555 if (hidden_ssid && ifsta->ssid_len == ssid_len)
2558 if (ssid_len == 1 && ssid[0] == ' ')
2564 static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
2565 struct ieee80211_if_sta *ifsta)
2567 struct ieee80211_local *local = sdata->local;
2568 struct ieee80211_sta_bss *bss;
2569 struct ieee80211_supported_band *sband;
2570 u8 bssid[ETH_ALEN], *pos;
2573 DECLARE_MAC_BUF(mac);
2576 /* Easier testing, use fixed BSSID. */
2577 memset(bssid, 0xfe, ETH_ALEN);
2579 /* Generate random, not broadcast, locally administered BSSID. Mix in
2580 * own MAC address to make sure that devices that do not have proper
2581 * random number generator get different BSSID. */
2582 get_random_bytes(bssid, ETH_ALEN);
2583 for (i = 0; i < ETH_ALEN; i++)
2584 bssid[i] ^= sdata->dev->dev_addr[i];
2589 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
2590 sdata->dev->name, print_mac(mac, bssid));
2592 bss = ieee80211_rx_bss_add(local, bssid,
2593 local->hw.conf.channel->center_freq,
2594 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
2598 bss->band = local->hw.conf.channel->band;
2599 sband = local->hw.wiphy->bands[bss->band];
2601 if (local->hw.conf.beacon_int == 0)
2602 local->hw.conf.beacon_int = 100;
2603 bss->beacon_int = local->hw.conf.beacon_int;
2604 bss->last_update = jiffies;
2605 bss->capability = WLAN_CAPABILITY_IBSS;
2607 if (sdata->default_key)
2608 bss->capability |= WLAN_CAPABILITY_PRIVACY;
2610 sdata->drop_unencrypted = 0;
2612 bss->supp_rates_len = sband->n_bitrates;
2613 pos = bss->supp_rates;
2614 for (i = 0; i < sband->n_bitrates; i++) {
2615 int rate = sband->bitrates[i].bitrate;
2616 *pos++ = (u8) (rate / 5);
2619 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
2620 ieee80211_rx_bss_put(local, bss);
2625 static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
2626 struct ieee80211_if_sta *ifsta)
2628 struct ieee80211_local *local = sdata->local;
2629 struct ieee80211_sta_bss *bss;
2633 DECLARE_MAC_BUF(mac);
2634 DECLARE_MAC_BUF(mac2);
2636 if (ifsta->ssid_len == 0)
2639 active_ibss = ieee80211_sta_active_ibss(sdata);
2640 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2641 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2642 sdata->dev->name, active_ibss);
2643 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2644 spin_lock_bh(&local->sta_bss_lock);
2645 list_for_each_entry(bss, &local->sta_bss_list, list) {
2646 if (ifsta->ssid_len != bss->ssid_len ||
2647 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2648 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2650 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2651 printk(KERN_DEBUG " bssid=%s found\n",
2652 print_mac(mac, bss->bssid));
2653 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2654 memcpy(bssid, bss->bssid, ETH_ALEN);
2656 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2659 spin_unlock_bh(&local->sta_bss_lock);
2661 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2663 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
2664 "%s\n", print_mac(mac, bssid),
2665 print_mac(mac2, ifsta->bssid));
2666 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2668 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2672 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2673 search_freq = bss->freq;
2675 search_freq = local->hw.conf.channel->center_freq;
2677 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
2678 ifsta->ssid, ifsta->ssid_len);
2682 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
2683 " based on configured SSID\n",
2684 sdata->dev->name, print_mac(mac, bssid));
2685 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
2686 ieee80211_rx_bss_put(local, bss);
2691 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2692 printk(KERN_DEBUG " did not try to join ibss\n");
2693 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2695 /* Selected IBSS not found in current scan results - try to scan */
2696 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
2697 !ieee80211_sta_active_ibss(sdata)) {
2698 mod_timer(&ifsta->timer, jiffies +
2699 IEEE80211_IBSS_MERGE_INTERVAL);
2700 } else if (time_after(jiffies, local->last_scan_completed +
2701 IEEE80211_SCAN_INTERVAL)) {
2702 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
2703 "join\n", sdata->dev->name);
2704 return ieee80211_sta_req_scan(sdata, ifsta->ssid,
2706 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
2707 int interval = IEEE80211_SCAN_INTERVAL;
2709 if (time_after(jiffies, ifsta->ibss_join_req +
2710 IEEE80211_IBSS_JOIN_TIMEOUT)) {
2711 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
2712 (!(local->oper_channel->flags &
2713 IEEE80211_CHAN_NO_IBSS)))
2714 return ieee80211_sta_create_ibss(sdata, ifsta);
2715 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
2716 printk(KERN_DEBUG "%s: IBSS not allowed on"
2717 " %d MHz\n", sdata->dev->name,
2718 local->hw.conf.channel->center_freq);
2721 /* No IBSS found - decrease scan interval and continue
2723 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2726 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2727 mod_timer(&ifsta->timer, jiffies + interval);
2735 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2737 struct ieee80211_if_sta *ifsta;
2740 if (len > IEEE80211_MAX_SSID_LEN)
2743 ifsta = &sdata->u.sta;
2745 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
2746 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
2747 memcpy(ifsta->ssid, ssid, len);
2748 ifsta->ssid_len = len;
2749 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2753 * Hack! MLME code needs to be cleaned up to have different
2754 * entry points for configuration and internal selection change
2756 if (netif_running(sdata->dev))
2757 res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID);
2759 printk(KERN_DEBUG "%s: Failed to config new SSID to "
2760 "the low-level driver\n", sdata->dev->name);
2766 ifsta->flags |= IEEE80211_STA_SSID_SET;
2768 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
2770 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
2771 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
2772 ifsta->ibss_join_req = jiffies;
2773 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2774 return ieee80211_sta_find_ibss(sdata, ifsta);
2781 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2783 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2784 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2785 *len = ifsta->ssid_len;
2790 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2792 struct ieee80211_if_sta *ifsta;
2795 ifsta = &sdata->u.sta;
2797 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2798 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2801 * Hack! See also ieee80211_sta_set_ssid.
2803 if (netif_running(sdata->dev))
2804 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
2806 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2807 "the low-level driver\n", sdata->dev->name);
2812 if (is_valid_ether_addr(bssid))
2813 ifsta->flags |= IEEE80211_STA_BSSID_SET;
2815 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
2821 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
2823 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2825 kfree(ifsta->extra_ie);
2827 ifsta->extra_ie = NULL;
2828 ifsta->extra_ie_len = 0;
2831 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
2832 if (!ifsta->extra_ie) {
2833 ifsta->extra_ie_len = 0;
2836 memcpy(ifsta->extra_ie, ie, len);
2837 ifsta->extra_ie_len = len;
2842 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
2843 struct sk_buff *skb, u8 *bssid,
2844 u8 *addr, u64 supp_rates)
2846 struct ieee80211_local *local = sdata->local;
2847 struct sta_info *sta;
2848 DECLARE_MAC_BUF(mac);
2849 int band = local->hw.conf.channel->band;
2851 /* TODO: Could consider removing the least recently used entry and
2852 * allow new one to be added. */
2853 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
2854 if (net_ratelimit()) {
2855 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
2856 "entry %s\n", sdata->dev->name, print_mac(mac, addr));
2861 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
2864 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2865 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
2866 wiphy_name(local->hw.wiphy), print_mac(mac, addr), sdata->dev->name);
2869 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
2873 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
2875 /* make sure mandatory rates are always added */
2876 sta->supp_rates[band] = supp_rates |
2877 ieee80211_sta_get_mandatory_rates(local, band);
2879 rate_control_rate_init(sta, local);
2881 if (sta_info_insert(sta))
2888 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
2889 struct ieee80211_if_sta *ifsta)
2891 struct ieee80211_local *local = sdata->local;
2892 struct ieee80211_sta_bss *bss, *selected = NULL;
2893 int top_rssi = 0, freq;
2895 spin_lock_bh(&local->sta_bss_lock);
2896 freq = local->oper_channel->center_freq;
2897 list_for_each_entry(bss, &local->sta_bss_list, list) {
2898 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2901 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2902 IEEE80211_STA_AUTO_BSSID_SEL |
2903 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
2904 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2905 !!sdata->default_key))
2908 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2912 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2913 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2916 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2917 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2920 if (!selected || top_rssi < bss->signal) {
2922 top_rssi = bss->signal;
2926 atomic_inc(&selected->users);
2927 spin_unlock_bh(&local->sta_bss_lock);
2930 ieee80211_set_freq(sdata, selected->freq);
2931 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2932 ieee80211_sta_set_ssid(sdata, selected->ssid,
2933 selected->ssid_len);
2934 ieee80211_sta_set_bssid(sdata, selected->bssid);
2935 ieee80211_sta_def_wmm_params(sdata, selected, 0);
2937 /* Send out direct probe if no probe resp was received or
2938 * the one we have is outdated
2940 if (!selected->last_probe_resp ||
2941 time_after(jiffies, selected->last_probe_resp
2942 + IEEE80211_SCAN_RESULT_EXPIRE))
2943 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2945 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2947 ieee80211_rx_bss_put(local, selected);
2948 ieee80211_sta_reset_auth(sdata, ifsta);
2951 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2952 ifsta->assoc_scan_tries++;
2953 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
2954 ieee80211_sta_start_scan(sdata, NULL, 0);
2956 ieee80211_sta_start_scan(sdata, ifsta->ssid,
2958 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2959 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2961 ifsta->state = IEEE80211_STA_MLME_DISABLED;
2967 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2969 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2971 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2972 sdata->dev->name, reason);
2974 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
2975 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
2978 ieee80211_set_disassoc(sdata, ifsta, true, true, reason);
2983 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2985 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2987 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2988 sdata->dev->name, reason);
2990 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2993 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
2996 ieee80211_set_disassoc(sdata, ifsta, false, true, reason);
3000 void ieee80211_notify_mac(struct ieee80211_hw *hw,
3001 enum ieee80211_notification_types notif_type)
3003 struct ieee80211_local *local = hw_to_local(hw);
3004 struct ieee80211_sub_if_data *sdata;
3006 switch (notif_type) {
3007 case IEEE80211_NOTIFY_RE_ASSOC:
3009 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3010 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3013 ieee80211_sta_req_auth(sdata, &sdata->u.sta);
3019 EXPORT_SYMBOL(ieee80211_notify_mac);
3021 void ieee80211_sta_work(struct work_struct *work)
3023 struct ieee80211_sub_if_data *sdata =
3024 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3025 struct ieee80211_local *local = sdata->local;
3026 struct ieee80211_if_sta *ifsta;
3027 struct sk_buff *skb;
3029 if (!netif_running(sdata->dev))
3032 if (local->sta_sw_scanning || local->sta_hw_scanning)
3035 if (WARN_ON(sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3036 sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3037 sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT))
3039 ifsta = &sdata->u.sta;
3041 while ((skb = skb_dequeue(&ifsta->skb_queue)))
3042 ieee80211_sta_rx_queued_mgmt(sdata, skb);
3044 #ifdef CONFIG_MAC80211_MESH
3045 if (ifsta->preq_queue_len &&
3047 ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3048 mesh_path_start_discovery(sdata);
3051 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
3052 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
3053 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
3054 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3055 ieee80211_sta_start_scan(sdata, ifsta->scan_ssid, ifsta->scan_ssid_len);
3059 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3060 if (ieee80211_sta_config_auth(sdata, ifsta))
3062 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3063 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3066 switch (ifsta->state) {
3067 case IEEE80211_STA_MLME_DISABLED:
3069 case IEEE80211_STA_MLME_DIRECT_PROBE:
3070 ieee80211_direct_probe(sdata, ifsta);
3072 case IEEE80211_STA_MLME_AUTHENTICATE:
3073 ieee80211_authenticate(sdata, ifsta);
3075 case IEEE80211_STA_MLME_ASSOCIATE:
3076 ieee80211_associate(sdata, ifsta);
3078 case IEEE80211_STA_MLME_ASSOCIATED:
3079 ieee80211_associated(sdata, ifsta);
3081 case IEEE80211_STA_MLME_IBSS_SEARCH:
3082 ieee80211_sta_find_ibss(sdata, ifsta);
3084 case IEEE80211_STA_MLME_IBSS_JOINED:
3085 ieee80211_sta_merge_ibss(sdata, ifsta);
3087 #ifdef CONFIG_MAC80211_MESH
3088 case IEEE80211_STA_MLME_MESH_UP:
3089 ieee80211_mesh_housekeeping(sdata, ifsta);
3097 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
3098 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3099 "mixed-cell disabled - disassociate\n", sdata->dev->name);
3101 ieee80211_set_disassoc(sdata, ifsta, false, true,
3102 WLAN_REASON_UNSPECIFIED);
3106 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3108 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
3109 struct ieee80211_if_sta *ifsta;
3111 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3112 ifsta = &sdata->u.sta;
3113 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3114 (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) &&
3115 !ieee80211_sta_active_ibss(sdata)))
3116 ieee80211_sta_find_ibss(sdata, ifsta);