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.
15 * order BSS list by RSSI(?) ("quality of AP")
16 * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
19 #include <linux/delay.h>
20 #include <linux/if_ether.h>
21 #include <linux/skbuff.h>
22 #include <linux/netdevice.h>
23 #include <linux/if_arp.h>
24 #include <linux/wireless.h>
25 #include <linux/random.h>
26 #include <linux/etherdevice.h>
27 #include <linux/rtnetlink.h>
28 #include <net/iw_handler.h>
29 #include <asm/types.h>
31 #include <net/mac80211.h>
32 #include "ieee80211_i.h"
37 #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
38 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
39 #define IEEE80211_AUTH_MAX_TRIES 3
40 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
41 #define IEEE80211_ASSOC_MAX_TRIES 3
42 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
43 #define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
44 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
45 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
46 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
47 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
48 #define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
50 #define IEEE80211_PROBE_DELAY (HZ / 33)
51 #define IEEE80211_CHANNEL_TIME (HZ / 33)
52 #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
53 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
54 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
55 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
56 #define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
58 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
61 #define ERP_INFO_USE_PROTECTION BIT(1)
63 /* mgmt header + 1 byte category code */
64 #define IEEE80211_MIN_ACTION_SIZE (24 + 1)
66 #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
67 #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
68 #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
69 #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
70 #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
72 /* next values represent the buffer size for A-MPDU frame.
73 * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
74 #define IEEE80211_MIN_AMPDU_BUF 0x8
75 #define IEEE80211_MAX_AMPDU_BUF 0x40
77 static void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
78 u8 *ssid, size_t ssid_len);
79 static struct ieee80211_sta_bss *
80 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
81 u8 *ssid, u8 ssid_len);
82 static void ieee80211_rx_bss_put(struct ieee80211_local *local,
83 struct ieee80211_sta_bss *bss);
84 static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
85 struct ieee80211_if_sta *ifsta);
86 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata);
87 static int ieee80211_sta_start_scan(struct ieee80211_sub_if_data *sdata,
88 u8 *ssid, size_t ssid_len);
89 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
90 struct ieee80211_if_sta *ifsta);
91 static void sta_rx_agg_session_timer_expired(unsigned long data);
94 static u8 * ieee80211_bss_get_ie(struct ieee80211_sta_bss *bss, u8 ie)
101 end = pos + bss->ies_len;
103 while (pos + 1 < end) {
104 if (pos + 2 + pos[1] > end)
115 static int ecw2cw(int ecw)
117 return (1 << ecw) - 1;
121 static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
122 struct ieee80211_sta_bss *bss,
125 struct ieee80211_local *local = sdata->local;
126 int i, have_higher_than_11mbit = 0;
129 /* cf. IEEE 802.11 9.2.12 */
130 for (i = 0; i < bss->supp_rates_len; i++)
131 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
132 have_higher_than_11mbit = 1;
134 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
135 have_higher_than_11mbit)
136 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
138 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
141 if (local->ops->conf_tx) {
142 struct ieee80211_tx_queue_params qparam;
144 memset(&qparam, 0, sizeof(qparam));
148 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
149 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
154 qparam.cw_max = 1023;
157 for (i = 0; i < local_to_hw(local)->queues; i++)
158 local->ops->conf_tx(local_to_hw(local), i, &qparam);
162 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
163 struct ieee80211_if_sta *ifsta,
164 u8 *wmm_param, size_t wmm_param_len)
166 struct ieee80211_tx_queue_params params;
171 if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
177 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
179 count = wmm_param[6] & 0x0f;
180 if (count == ifsta->wmm_last_param_set)
182 ifsta->wmm_last_param_set = count;
185 left = wmm_param_len - 8;
187 memset(¶ms, 0, sizeof(params));
189 if (!local->ops->conf_tx)
193 for (; left >= 4; left -= 4, pos += 4) {
194 int aci = (pos[0] >> 5) & 0x03;
195 int acm = (pos[0] >> 4) & 0x01;
202 local->wmm_acm |= BIT(0) | BIT(3);
207 local->wmm_acm |= BIT(4) | BIT(5);
212 local->wmm_acm |= BIT(6) | BIT(7);
218 local->wmm_acm |= BIT(1) | BIT(2);
222 params.aifs = pos[0] & 0x0f;
223 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
224 params.cw_min = ecw2cw(pos[1] & 0x0f);
225 params.txop = get_unaligned_le16(pos + 2);
226 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
227 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
228 "cWmin=%d cWmax=%d txop=%d\n",
229 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
230 params.cw_max, params.txop);
232 /* TODO: handle ACM (block TX, fallback to next lowest allowed
234 if (local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) {
235 printk(KERN_DEBUG "%s: failed to set TX queue "
236 "parameters for queue %d\n", local->mdev->name, queue);
241 static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
243 bool use_short_preamble)
245 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
246 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
247 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
248 DECLARE_MAC_BUF(mac);
252 if (use_protection != bss_conf->use_cts_prot) {
253 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
254 if (net_ratelimit()) {
255 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
258 use_protection ? "enabled" : "disabled",
259 print_mac(mac, ifsta->bssid));
262 bss_conf->use_cts_prot = use_protection;
263 changed |= BSS_CHANGED_ERP_CTS_PROT;
266 if (use_short_preamble != bss_conf->use_short_preamble) {
267 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
268 if (net_ratelimit()) {
269 printk(KERN_DEBUG "%s: switched to %s barker preamble"
272 use_short_preamble ? "short" : "long",
273 print_mac(mac, ifsta->bssid));
276 bss_conf->use_short_preamble = use_short_preamble;
277 changed |= BSS_CHANGED_ERP_PREAMBLE;
283 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
286 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
287 bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
289 return ieee80211_handle_protect_preamb(sdata,
290 use_protection, use_short_preamble);
293 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
294 struct ieee80211_sta_bss *bss)
298 if (bss->has_erp_value)
299 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
301 u16 capab = bss->capability;
302 changed |= ieee80211_handle_protect_preamb(sdata, false,
303 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
309 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
310 struct ieee80211_ht_info *ht_info)
316 memset(ht_info, 0, sizeof(*ht_info));
319 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
321 ht_info->ht_supported = 1;
322 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
323 ht_info->ampdu_factor =
324 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
325 ht_info->ampdu_density =
326 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
327 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
329 ht_info->ht_supported = 0;
334 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
335 struct ieee80211_ht_addt_info *ht_add_info_ie,
336 struct ieee80211_ht_bss_info *bss_info)
338 if (bss_info == NULL)
341 memset(bss_info, 0, sizeof(*bss_info));
343 if (ht_add_info_ie) {
345 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
347 bss_info->primary_channel = ht_add_info_ie->control_chan;
348 bss_info->bss_cap = ht_add_info_ie->ht_param;
349 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
355 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata,
356 struct ieee80211_if_sta *ifsta)
358 union iwreq_data wrqu;
359 memset(&wrqu, 0, sizeof(wrqu));
360 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
361 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
362 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
363 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
366 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata,
367 struct ieee80211_if_sta *ifsta)
369 union iwreq_data wrqu;
371 if (ifsta->assocreq_ies) {
372 memset(&wrqu, 0, sizeof(wrqu));
373 wrqu.data.length = ifsta->assocreq_ies_len;
374 wireless_send_event(sdata->dev, IWEVASSOCREQIE, &wrqu,
375 ifsta->assocreq_ies);
377 if (ifsta->assocresp_ies) {
378 memset(&wrqu, 0, sizeof(wrqu));
379 wrqu.data.length = ifsta->assocresp_ies_len;
380 wireless_send_event(sdata->dev, IWEVASSOCRESPIE, &wrqu,
381 ifsta->assocresp_ies);
386 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
387 struct ieee80211_if_sta *ifsta)
389 struct ieee80211_local *local = sdata->local;
390 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
391 u32 changed = BSS_CHANGED_ASSOC;
393 struct ieee80211_sta_bss *bss;
395 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
397 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
400 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
401 conf->channel->center_freq,
402 ifsta->ssid, ifsta->ssid_len);
404 /* set timing information */
405 sdata->bss_conf.beacon_int = bss->beacon_int;
406 sdata->bss_conf.timestamp = bss->timestamp;
407 sdata->bss_conf.dtim_period = bss->dtim_period;
409 changed |= ieee80211_handle_bss_capability(sdata, bss);
411 ieee80211_rx_bss_put(local, bss);
414 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
415 changed |= BSS_CHANGED_HT;
416 sdata->bss_conf.assoc_ht = 1;
417 sdata->bss_conf.ht_conf = &conf->ht_conf;
418 sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
421 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
422 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
423 ieee80211_sta_send_associnfo(sdata, ifsta);
425 ifsta->last_probe = jiffies;
426 ieee80211_led_assoc(local, 1);
428 sdata->bss_conf.assoc = 1;
429 ieee80211_bss_info_change_notify(sdata, changed);
431 netif_carrier_on(sdata->dev);
433 ieee80211_sta_send_apinfo(sdata, ifsta);
436 void ieee80211_sta_tx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
439 skb->dev = sdata->local->mdev;
440 skb_set_mac_header(skb, 0);
441 skb_set_network_header(skb, 0);
442 skb_set_transport_header(skb, 0);
444 skb->iif = sdata->dev->ifindex;
445 skb->do_not_encrypt = !encrypt;
451 static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
452 struct ieee80211_if_sta *ifsta,
453 int transaction, u8 *extra, size_t extra_len,
456 struct ieee80211_local *local = sdata->local;
458 struct ieee80211_mgmt *mgmt;
460 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
461 sizeof(*mgmt) + 6 + extra_len);
463 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
464 "frame\n", sdata->dev->name);
467 skb_reserve(skb, local->hw.extra_tx_headroom);
469 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
470 memset(mgmt, 0, 24 + 6);
471 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
472 IEEE80211_STYPE_AUTH);
474 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
475 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
476 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
477 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
478 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
479 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
480 ifsta->auth_transaction = transaction + 1;
481 mgmt->u.auth.status_code = cpu_to_le16(0);
483 memcpy(skb_put(skb, extra_len), extra, extra_len);
485 ieee80211_sta_tx(sdata, skb, encrypt);
488 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
489 struct ieee80211_if_sta *ifsta)
491 DECLARE_MAC_BUF(mac);
493 ifsta->direct_probe_tries++;
494 if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
495 printk(KERN_DEBUG "%s: direct probe to AP %s timed out\n",
496 sdata->dev->name, print_mac(mac, ifsta->bssid));
497 ifsta->state = IEEE80211_STA_MLME_DISABLED;
501 printk(KERN_DEBUG "%s: direct probe to AP %s try %d\n",
502 sdata->dev->name, print_mac(mac, ifsta->bssid),
503 ifsta->direct_probe_tries);
505 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
507 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request);
509 /* Direct probe is sent to broadcast address as some APs
510 * will not answer to direct packet in unassociated state.
512 ieee80211_send_probe_req(sdata, NULL,
513 ifsta->ssid, ifsta->ssid_len);
515 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
519 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
520 struct ieee80211_if_sta *ifsta)
522 DECLARE_MAC_BUF(mac);
525 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
526 printk(KERN_DEBUG "%s: authentication with AP %s"
528 sdata->dev->name, print_mac(mac, ifsta->bssid));
529 ifsta->state = IEEE80211_STA_MLME_DISABLED;
533 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
534 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
535 sdata->dev->name, print_mac(mac, ifsta->bssid));
537 ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
539 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
542 static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss,
543 struct ieee80211_supported_band *sband,
549 for (i = 0; i < bss->supp_rates_len; i++) {
550 int rate = (bss->supp_rates[i] & 0x7F) * 5;
552 for (j = 0; j < sband->n_bitrates; j++)
553 if (sband->bitrates[j].bitrate == rate) {
563 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
564 struct ieee80211_if_sta *ifsta)
566 struct ieee80211_local *local = sdata->local;
568 struct ieee80211_mgmt *mgmt;
569 u8 *pos, *ies, *ht_add_ie;
570 int i, len, count, rates_len, supp_rates_len;
572 struct ieee80211_sta_bss *bss;
574 struct ieee80211_supported_band *sband;
577 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
578 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
581 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
582 "frame\n", sdata->dev->name);
585 skb_reserve(skb, local->hw.extra_tx_headroom);
587 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
589 capab = ifsta->capab;
591 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
592 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
593 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
594 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
595 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
598 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
599 local->hw.conf.channel->center_freq,
600 ifsta->ssid, ifsta->ssid_len);
602 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
603 capab |= WLAN_CAPABILITY_PRIVACY;
607 /* get all rates supported by the device and the AP as
608 * some APs don't like getting a superset of their rates
609 * in the association request (e.g. D-Link DAP 1353 in
611 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
613 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
614 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
615 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
617 ieee80211_rx_bss_put(local, bss);
620 rates_len = sband->n_bitrates;
623 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
625 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
626 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
627 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
629 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
631 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
632 IEEE80211_STYPE_REASSOC_REQ);
633 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
634 mgmt->u.reassoc_req.listen_interval =
635 cpu_to_le16(local->hw.conf.listen_interval);
636 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
640 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
641 IEEE80211_STYPE_ASSOC_REQ);
642 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
643 mgmt->u.reassoc_req.listen_interval =
644 cpu_to_le16(local->hw.conf.listen_interval);
648 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
649 *pos++ = WLAN_EID_SSID;
650 *pos++ = ifsta->ssid_len;
651 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
653 /* add all rates which were marked to be used above */
654 supp_rates_len = rates_len;
655 if (supp_rates_len > 8)
658 len = sband->n_bitrates;
659 pos = skb_put(skb, supp_rates_len + 2);
660 *pos++ = WLAN_EID_SUPP_RATES;
661 *pos++ = supp_rates_len;
664 for (i = 0; i < sband->n_bitrates; i++) {
665 if (BIT(i) & rates) {
666 int rate = sband->bitrates[i].bitrate;
667 *pos++ = (u8) (rate / 5);
673 if (rates_len > count) {
674 pos = skb_put(skb, rates_len - count + 2);
675 *pos++ = WLAN_EID_EXT_SUPP_RATES;
676 *pos++ = rates_len - count;
678 for (i++; i < sband->n_bitrates; i++) {
679 if (BIT(i) & rates) {
680 int rate = sband->bitrates[i].bitrate;
681 *pos++ = (u8) (rate / 5);
686 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
687 /* 1. power capabilities */
688 pos = skb_put(skb, 4);
689 *pos++ = WLAN_EID_PWR_CAPABILITY;
691 *pos++ = 0; /* min tx power */
692 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
694 /* 2. supported channels */
695 /* TODO: get this in reg domain format */
696 pos = skb_put(skb, 2 * sband->n_channels + 2);
697 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
698 *pos++ = 2 * sband->n_channels;
699 for (i = 0; i < sband->n_channels; i++) {
700 *pos++ = ieee80211_frequency_to_channel(
701 sband->channels[i].center_freq);
702 *pos++ = 1; /* one channel in the subband*/
706 if (ifsta->extra_ie) {
707 pos = skb_put(skb, ifsta->extra_ie_len);
708 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
711 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
712 pos = skb_put(skb, 9);
713 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
714 *pos++ = 7; /* len */
715 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
718 *pos++ = 2; /* WME */
719 *pos++ = 0; /* WME info */
720 *pos++ = 1; /* WME ver */
724 /* wmm support is a must to HT */
725 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
726 sband->ht_info.ht_supported &&
727 (ht_add_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_EXTRA_INFO))) {
728 struct ieee80211_ht_addt_info *ht_add_info =
729 (struct ieee80211_ht_addt_info *)ht_add_ie;
730 u16 cap = sband->ht_info.cap;
732 u32 flags = local->hw.conf.channel->flags;
734 switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) {
735 case IEEE80211_HT_IE_CHA_SEC_ABOVE:
736 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
737 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
738 cap &= ~IEEE80211_HT_CAP_SGI_40;
741 case IEEE80211_HT_IE_CHA_SEC_BELOW:
742 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
743 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
744 cap &= ~IEEE80211_HT_CAP_SGI_40;
749 tmp = cpu_to_le16(cap);
750 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
751 *pos++ = WLAN_EID_HT_CAPABILITY;
752 *pos++ = sizeof(struct ieee80211_ht_cap);
753 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
754 memcpy(pos, &tmp, sizeof(u16));
756 /* TODO: needs a define here for << 2 */
757 *pos++ = sband->ht_info.ampdu_factor |
758 (sband->ht_info.ampdu_density << 2);
759 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
762 kfree(ifsta->assocreq_ies);
763 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
764 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
765 if (ifsta->assocreq_ies)
766 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
768 ieee80211_sta_tx(sdata, skb, 0);
772 static void ieee80211_send_deauth(struct ieee80211_sub_if_data *sdata,
773 struct ieee80211_if_sta *ifsta, u16 reason)
775 struct ieee80211_local *local = sdata->local;
777 struct ieee80211_mgmt *mgmt;
779 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
781 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
782 "frame\n", sdata->dev->name);
785 skb_reserve(skb, local->hw.extra_tx_headroom);
787 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
789 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
790 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
791 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
792 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
793 IEEE80211_STYPE_DEAUTH);
795 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
797 ieee80211_sta_tx(sdata, skb, 0);
801 static void ieee80211_send_disassoc(struct ieee80211_sub_if_data *sdata,
802 struct ieee80211_if_sta *ifsta, u16 reason)
804 struct ieee80211_local *local = sdata->local;
806 struct ieee80211_mgmt *mgmt;
808 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
810 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
811 "frame\n", sdata->dev->name);
814 skb_reserve(skb, local->hw.extra_tx_headroom);
816 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
818 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
819 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
820 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
821 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
822 IEEE80211_STYPE_DISASSOC);
824 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
826 ieee80211_sta_tx(sdata, skb, 0);
829 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
830 struct ieee80211_if_sta *ifsta, bool deauth,
831 bool self_disconnected, u16 reason)
833 struct ieee80211_local *local = sdata->local;
834 struct sta_info *sta;
835 u32 changed = BSS_CHANGED_ASSOC;
839 sta = sta_info_get(local, ifsta->bssid);
846 ifsta->direct_probe_tries = 0;
847 ifsta->auth_tries = 0;
849 ifsta->assoc_scan_tries = 0;
850 ifsta->assoc_tries = 0;
852 netif_carrier_off(sdata->dev);
854 ieee80211_sta_tear_down_BA_sessions(sdata, sta->addr);
856 if (self_disconnected) {
858 ieee80211_send_deauth(sdata, ifsta, reason);
860 ieee80211_send_disassoc(sdata, ifsta, reason);
863 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
864 changed |= ieee80211_reset_erp_info(sdata);
866 if (sdata->bss_conf.assoc_ht)
867 changed |= BSS_CHANGED_HT;
869 sdata->bss_conf.assoc_ht = 0;
870 sdata->bss_conf.ht_conf = NULL;
871 sdata->bss_conf.ht_bss_conf = NULL;
873 ieee80211_led_assoc(local, 0);
874 sdata->bss_conf.assoc = 0;
876 ieee80211_sta_send_apinfo(sdata, ifsta);
878 if (self_disconnected)
879 ifsta->state = IEEE80211_STA_MLME_DISABLED;
881 sta_info_unlink(&sta);
885 sta_info_destroy(sta);
888 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
889 struct ieee80211_if_sta *ifsta)
891 struct ieee80211_local *local = sdata->local;
892 struct ieee80211_sta_bss *bss;
897 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
900 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
901 local->hw.conf.channel->center_freq,
902 ifsta->ssid, ifsta->ssid_len);
906 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
907 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
908 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
910 ieee80211_rx_bss_put(local, bss);
912 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
919 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
920 struct ieee80211_if_sta *ifsta)
922 DECLARE_MAC_BUF(mac);
924 ifsta->assoc_tries++;
925 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
926 printk(KERN_DEBUG "%s: association with AP %s"
928 sdata->dev->name, print_mac(mac, ifsta->bssid));
929 ifsta->state = IEEE80211_STA_MLME_DISABLED;
933 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
934 printk(KERN_DEBUG "%s: associate with AP %s\n",
935 sdata->dev->name, print_mac(mac, ifsta->bssid));
936 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
937 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
938 "mixed-cell disabled - abort association\n", sdata->dev->name);
939 ifsta->state = IEEE80211_STA_MLME_DISABLED;
943 ieee80211_send_assoc(sdata, ifsta);
945 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
949 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
950 struct ieee80211_if_sta *ifsta)
952 struct ieee80211_local *local = sdata->local;
953 struct sta_info *sta;
955 DECLARE_MAC_BUF(mac);
957 /* TODO: start monitoring current AP signal quality and number of
958 * missed beacons. Scan other channels every now and then and search
960 /* TODO: remove expired BSSes */
962 ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
966 sta = sta_info_get(local, ifsta->bssid);
968 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
969 sdata->dev->name, print_mac(mac, ifsta->bssid));
973 if (time_after(jiffies,
974 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
975 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
976 printk(KERN_DEBUG "%s: No ProbeResp from "
977 "current AP %s - assume out of "
979 sdata->dev->name, print_mac(mac, ifsta->bssid));
982 ieee80211_send_probe_req(sdata, ifsta->bssid,
984 local->scan_ssid_len);
985 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
987 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
988 if (time_after(jiffies, ifsta->last_probe +
989 IEEE80211_PROBE_INTERVAL)) {
990 ifsta->last_probe = jiffies;
991 ieee80211_send_probe_req(sdata, ifsta->bssid,
1001 ieee80211_set_disassoc(sdata, ifsta, true, true,
1002 WLAN_REASON_PREV_AUTH_NOT_VALID);
1004 mod_timer(&ifsta->timer, jiffies +
1005 IEEE80211_MONITORING_INTERVAL);
1009 static void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1010 u8 *ssid, size_t ssid_len)
1012 struct ieee80211_local *local = sdata->local;
1013 struct ieee80211_supported_band *sband;
1014 struct sk_buff *skb;
1015 struct ieee80211_mgmt *mgmt;
1016 u8 *pos, *supp_rates, *esupp_rates = NULL;
1019 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
1021 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1022 "request\n", sdata->dev->name);
1025 skb_reserve(skb, local->hw.extra_tx_headroom);
1027 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1028 memset(mgmt, 0, 24);
1029 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1030 IEEE80211_STYPE_PROBE_REQ);
1031 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1033 memcpy(mgmt->da, dst, ETH_ALEN);
1034 memcpy(mgmt->bssid, dst, ETH_ALEN);
1036 memset(mgmt->da, 0xff, ETH_ALEN);
1037 memset(mgmt->bssid, 0xff, ETH_ALEN);
1039 pos = skb_put(skb, 2 + ssid_len);
1040 *pos++ = WLAN_EID_SSID;
1042 memcpy(pos, ssid, ssid_len);
1044 supp_rates = skb_put(skb, 2);
1045 supp_rates[0] = WLAN_EID_SUPP_RATES;
1047 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1049 for (i = 0; i < sband->n_bitrates; i++) {
1050 struct ieee80211_rate *rate = &sband->bitrates[i];
1052 pos = skb_put(skb, 1);
1054 } else if (supp_rates[1] == 8) {
1055 esupp_rates = skb_put(skb, 3);
1056 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1058 pos = &esupp_rates[2];
1060 pos = skb_put(skb, 1);
1063 *pos = rate->bitrate / 5;
1066 ieee80211_sta_tx(sdata, skb, 0);
1070 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
1072 if (!sdata || !sdata->default_key ||
1073 sdata->default_key->conf.alg != ALG_WEP)
1079 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
1080 struct ieee80211_if_sta *ifsta)
1082 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1083 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1084 ieee80211_associate(sdata, ifsta);
1088 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1089 struct ieee80211_if_sta *ifsta,
1090 struct ieee80211_mgmt *mgmt,
1094 struct ieee802_11_elems elems;
1096 pos = mgmt->u.auth.variable;
1097 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1098 if (!elems.challenge)
1100 ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
1101 elems.challenge_len + 2, 1);
1104 static void ieee80211_send_addba_resp(struct ieee80211_sub_if_data *sdata, u8 *da, u16 tid,
1105 u8 dialog_token, u16 status, u16 policy,
1106 u16 buf_size, u16 timeout)
1108 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1109 struct ieee80211_local *local = sdata->local;
1110 struct sk_buff *skb;
1111 struct ieee80211_mgmt *mgmt;
1114 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1117 printk(KERN_DEBUG "%s: failed to allocate buffer "
1118 "for addba resp frame\n", sdata->dev->name);
1122 skb_reserve(skb, local->hw.extra_tx_headroom);
1123 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1124 memset(mgmt, 0, 24);
1125 memcpy(mgmt->da, da, ETH_ALEN);
1126 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1127 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1128 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
1130 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1131 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1132 IEEE80211_STYPE_ACTION);
1134 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1135 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1136 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1137 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1139 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1140 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1141 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1143 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1144 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1145 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1147 ieee80211_sta_tx(sdata, skb, 0);
1152 void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata, const u8 *da,
1153 u16 tid, u8 dialog_token, u16 start_seq_num,
1154 u16 agg_size, u16 timeout)
1156 struct ieee80211_local *local = sdata->local;
1157 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1158 struct sk_buff *skb;
1159 struct ieee80211_mgmt *mgmt;
1162 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1165 printk(KERN_ERR "%s: failed to allocate buffer "
1166 "for addba request frame\n", sdata->dev->name);
1169 skb_reserve(skb, local->hw.extra_tx_headroom);
1170 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1171 memset(mgmt, 0, 24);
1172 memcpy(mgmt->da, da, ETH_ALEN);
1173 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1174 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1175 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
1177 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1179 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1180 IEEE80211_STYPE_ACTION);
1182 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1184 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1185 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1187 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1188 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
1189 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1190 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
1192 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1194 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1195 mgmt->u.action.u.addba_req.start_seq_num =
1196 cpu_to_le16(start_seq_num << 4);
1198 ieee80211_sta_tx(sdata, skb, 0);
1201 static void ieee80211_sta_process_addba_request(struct ieee80211_local *local,
1202 struct ieee80211_mgmt *mgmt,
1205 struct ieee80211_hw *hw = &local->hw;
1206 struct ieee80211_conf *conf = &hw->conf;
1207 struct sta_info *sta;
1208 struct tid_ampdu_rx *tid_agg_rx;
1209 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1211 int ret = -EOPNOTSUPP;
1212 DECLARE_MAC_BUF(mac);
1216 sta = sta_info_get(local, mgmt->sa);
1222 /* extract session parameters from addba request frame */
1223 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1224 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1226 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1228 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1229 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1230 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1231 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1233 status = WLAN_STATUS_REQUEST_DECLINED;
1235 /* sanity check for incoming parameters:
1236 * check if configuration can support the BA policy
1237 * and if buffer size does not exceeds max value */
1238 if (((ba_policy != 1)
1239 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1240 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1241 status = WLAN_STATUS_INVALID_QOS_PARAM;
1242 #ifdef CONFIG_MAC80211_HT_DEBUG
1243 if (net_ratelimit())
1244 printk(KERN_DEBUG "AddBA Req with bad params from "
1245 "%s on tid %u. policy %d, buffer size %d\n",
1246 print_mac(mac, mgmt->sa), tid, ba_policy,
1248 #endif /* CONFIG_MAC80211_HT_DEBUG */
1251 /* determine default buffer size */
1252 if (buf_size == 0) {
1253 struct ieee80211_supported_band *sband;
1255 sband = local->hw.wiphy->bands[conf->channel->band];
1256 buf_size = IEEE80211_MIN_AMPDU_BUF;
1257 buf_size = buf_size << sband->ht_info.ampdu_factor;
1261 /* examine state machine */
1262 spin_lock_bh(&sta->lock);
1264 if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
1265 #ifdef CONFIG_MAC80211_HT_DEBUG
1266 if (net_ratelimit())
1267 printk(KERN_DEBUG "unexpected AddBA Req from "
1269 print_mac(mac, mgmt->sa), tid);
1270 #endif /* CONFIG_MAC80211_HT_DEBUG */
1274 /* prepare A-MPDU MLME for Rx aggregation */
1275 sta->ampdu_mlme.tid_rx[tid] =
1276 kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1277 if (!sta->ampdu_mlme.tid_rx[tid]) {
1278 #ifdef CONFIG_MAC80211_HT_DEBUG
1279 if (net_ratelimit())
1280 printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1286 sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1287 sta_rx_agg_session_timer_expired;
1288 sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1289 (unsigned long)&sta->timer_to_tid[tid];
1290 init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1292 tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1294 /* prepare reordering buffer */
1295 tid_agg_rx->reorder_buf =
1296 kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC);
1297 if (!tid_agg_rx->reorder_buf) {
1298 #ifdef CONFIG_MAC80211_HT_DEBUG
1299 if (net_ratelimit())
1300 printk(KERN_ERR "can not allocate reordering buffer "
1301 "to tid %d\n", tid);
1303 kfree(sta->ampdu_mlme.tid_rx[tid]);
1306 memset(tid_agg_rx->reorder_buf, 0,
1307 buf_size * sizeof(struct sk_buff *));
1309 if (local->ops->ampdu_action)
1310 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1311 sta->addr, tid, &start_seq_num);
1312 #ifdef CONFIG_MAC80211_HT_DEBUG
1313 printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
1314 #endif /* CONFIG_MAC80211_HT_DEBUG */
1317 kfree(tid_agg_rx->reorder_buf);
1319 sta->ampdu_mlme.tid_rx[tid] = NULL;
1323 /* change state and send addba resp */
1324 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
1325 tid_agg_rx->dialog_token = dialog_token;
1326 tid_agg_rx->ssn = start_seq_num;
1327 tid_agg_rx->head_seq_num = start_seq_num;
1328 tid_agg_rx->buf_size = buf_size;
1329 tid_agg_rx->timeout = timeout;
1330 tid_agg_rx->stored_mpdu_num = 0;
1331 status = WLAN_STATUS_SUCCESS;
1333 spin_unlock_bh(&sta->lock);
1336 ieee80211_send_addba_resp(sta->sdata, sta->addr, tid,
1337 dialog_token, status, 1, buf_size, timeout);
1341 static void ieee80211_sta_process_addba_resp(struct ieee80211_local *local,
1342 struct ieee80211_mgmt *mgmt,
1345 struct ieee80211_hw *hw = &local->hw;
1346 struct sta_info *sta;
1353 sta = sta_info_get(local, mgmt->sa);
1359 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1360 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1362 state = &sta->ampdu_mlme.tid_state_tx[tid];
1364 spin_lock_bh(&sta->lock);
1366 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1367 spin_unlock_bh(&sta->lock);
1368 goto addba_resp_exit;
1371 if (mgmt->u.action.u.addba_resp.dialog_token !=
1372 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
1373 spin_unlock_bh(&sta->lock);
1374 #ifdef CONFIG_MAC80211_HT_DEBUG
1375 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1376 #endif /* CONFIG_MAC80211_HT_DEBUG */
1377 goto addba_resp_exit;
1380 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
1381 #ifdef CONFIG_MAC80211_HT_DEBUG
1382 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1383 #endif /* CONFIG_MAC80211_HT_DEBUG */
1384 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1385 == WLAN_STATUS_SUCCESS) {
1386 *state |= HT_ADDBA_RECEIVED_MSK;
1387 sta->ampdu_mlme.addba_req_num[tid] = 0;
1389 if (*state == HT_AGG_STATE_OPERATIONAL)
1390 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1392 spin_unlock_bh(&sta->lock);
1394 sta->ampdu_mlme.addba_req_num[tid]++;
1395 /* this will allow the state check in stop_BA_session */
1396 *state = HT_AGG_STATE_OPERATIONAL;
1397 spin_unlock_bh(&sta->lock);
1398 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1399 WLAN_BACK_INITIATOR);
1406 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata, const u8 *da, u16 tid,
1407 u16 initiator, u16 reason_code)
1409 struct ieee80211_local *local = sdata->local;
1410 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1411 struct sk_buff *skb;
1412 struct ieee80211_mgmt *mgmt;
1415 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1418 printk(KERN_ERR "%s: failed to allocate buffer "
1419 "for delba frame\n", sdata->dev->name);
1423 skb_reserve(skb, local->hw.extra_tx_headroom);
1424 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1425 memset(mgmt, 0, 24);
1426 memcpy(mgmt->da, da, ETH_ALEN);
1427 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1428 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1429 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
1431 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1432 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1433 IEEE80211_STYPE_ACTION);
1435 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1437 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1438 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1439 params = (u16)(initiator << 11); /* bit 11 initiator */
1440 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1442 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1443 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1445 ieee80211_sta_tx(sdata, skb, 0);
1448 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn)
1450 struct ieee80211_local *local = sdata->local;
1451 struct sk_buff *skb;
1452 struct ieee80211_bar *bar;
1453 u16 bar_control = 0;
1455 skb = dev_alloc_skb(sizeof(*bar) + local->hw.extra_tx_headroom);
1457 printk(KERN_ERR "%s: failed to allocate buffer for "
1458 "bar frame\n", sdata->dev->name);
1461 skb_reserve(skb, local->hw.extra_tx_headroom);
1462 bar = (struct ieee80211_bar *)skb_put(skb, sizeof(*bar));
1463 memset(bar, 0, sizeof(*bar));
1464 bar->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
1465 IEEE80211_STYPE_BACK_REQ);
1466 memcpy(bar->ra, ra, ETH_ALEN);
1467 memcpy(bar->ta, sdata->dev->dev_addr, ETH_ALEN);
1468 bar_control |= (u16)IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL;
1469 bar_control |= (u16)IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA;
1470 bar_control |= (u16)(tid << 12);
1471 bar->control = cpu_to_le16(bar_control);
1472 bar->start_seq_num = cpu_to_le16(ssn);
1474 ieee80211_sta_tx(sdata, skb, 0);
1477 void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid,
1478 u16 initiator, u16 reason)
1480 struct ieee80211_local *local = sdata->local;
1481 struct ieee80211_hw *hw = &local->hw;
1482 struct sta_info *sta;
1484 DECLARE_MAC_BUF(mac);
1488 sta = sta_info_get(local, ra);
1494 /* check if TID is in operational state */
1495 spin_lock_bh(&sta->lock);
1496 if (sta->ampdu_mlme.tid_state_rx[tid]
1497 != HT_AGG_STATE_OPERATIONAL) {
1498 spin_unlock_bh(&sta->lock);
1502 sta->ampdu_mlme.tid_state_rx[tid] =
1503 HT_AGG_STATE_REQ_STOP_BA_MSK |
1504 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1505 spin_unlock_bh(&sta->lock);
1507 /* stop HW Rx aggregation. ampdu_action existence
1508 * already verified in session init so we add the BUG_ON */
1509 BUG_ON(!local->ops->ampdu_action);
1511 #ifdef CONFIG_MAC80211_HT_DEBUG
1512 printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n",
1513 print_mac(mac, ra), tid);
1514 #endif /* CONFIG_MAC80211_HT_DEBUG */
1516 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1519 printk(KERN_DEBUG "HW problem - can not stop rx "
1520 "aggregation for tid %d\n", tid);
1522 /* shutdown timer has not expired */
1523 if (initiator != WLAN_BACK_TIMER)
1524 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1526 /* check if this is a self generated aggregation halt */
1527 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1528 ieee80211_send_delba(sdata, ra, tid, 0, reason);
1530 /* free the reordering buffer */
1531 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1532 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
1533 /* release the reordered frames */
1534 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1535 sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1536 sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
1539 /* free resources */
1540 kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1541 kfree(sta->ampdu_mlme.tid_rx[tid]);
1542 sta->ampdu_mlme.tid_rx[tid] = NULL;
1543 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
1549 static void ieee80211_sta_process_delba(struct ieee80211_sub_if_data *sdata,
1550 struct ieee80211_mgmt *mgmt, size_t len)
1552 struct ieee80211_local *local = sdata->local;
1553 struct sta_info *sta;
1556 DECLARE_MAC_BUF(mac);
1560 sta = sta_info_get(local, mgmt->sa);
1566 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1567 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1568 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1570 #ifdef CONFIG_MAC80211_HT_DEBUG
1571 if (net_ratelimit())
1572 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1573 print_mac(mac, mgmt->sa),
1574 initiator ? "initiator" : "recipient", tid,
1575 mgmt->u.action.u.delba.reason_code);
1576 #endif /* CONFIG_MAC80211_HT_DEBUG */
1578 if (initiator == WLAN_BACK_INITIATOR)
1579 ieee80211_sta_stop_rx_ba_session(sdata, sta->addr, tid,
1580 WLAN_BACK_INITIATOR, 0);
1581 else { /* WLAN_BACK_RECIPIENT */
1582 spin_lock_bh(&sta->lock);
1583 sta->ampdu_mlme.tid_state_tx[tid] =
1584 HT_AGG_STATE_OPERATIONAL;
1585 spin_unlock_bh(&sta->lock);
1586 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1587 WLAN_BACK_RECIPIENT);
1593 * After sending add Block Ack request we activated a timer until
1594 * add Block Ack response will arrive from the recipient.
1595 * If this timer expires sta_addba_resp_timer_expired will be executed.
1597 void sta_addba_resp_timer_expired(unsigned long data)
1599 /* not an elegant detour, but there is no choice as the timer passes
1600 * only one argument, and both sta_info and TID are needed, so init
1601 * flow in sta_info_create gives the TID as data, while the timer_to_id
1602 * array gives the sta through container_of */
1603 u16 tid = *(u8 *)data;
1604 struct sta_info *temp_sta = container_of((void *)data,
1605 struct sta_info, timer_to_tid[tid]);
1607 struct ieee80211_local *local = temp_sta->local;
1608 struct ieee80211_hw *hw = &local->hw;
1609 struct sta_info *sta;
1614 sta = sta_info_get(local, temp_sta->addr);
1620 state = &sta->ampdu_mlme.tid_state_tx[tid];
1621 /* check if the TID waits for addBA response */
1622 spin_lock_bh(&sta->lock);
1623 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1624 spin_unlock_bh(&sta->lock);
1625 *state = HT_AGG_STATE_IDLE;
1626 #ifdef CONFIG_MAC80211_HT_DEBUG
1627 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1628 "expecting addBA response there", tid);
1630 goto timer_expired_exit;
1633 #ifdef CONFIG_MAC80211_HT_DEBUG
1634 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1637 /* go through the state check in stop_BA_session */
1638 *state = HT_AGG_STATE_OPERATIONAL;
1639 spin_unlock_bh(&sta->lock);
1640 ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1641 WLAN_BACK_INITIATOR);
1648 * After accepting the AddBA Request we activated a timer,
1649 * resetting it after each frame that arrives from the originator.
1650 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1652 static void sta_rx_agg_session_timer_expired(unsigned long data)
1654 /* not an elegant detour, but there is no choice as the timer passes
1655 * only one argument, and various sta_info are needed here, so init
1656 * flow in sta_info_create gives the TID as data, while the timer_to_id
1657 * array gives the sta through container_of */
1658 u8 *ptid = (u8 *)data;
1659 u8 *timer_to_id = ptid - *ptid;
1660 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1663 #ifdef CONFIG_MAC80211_HT_DEBUG
1664 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1666 ieee80211_sta_stop_rx_ba_session(sta->sdata, sta->addr,
1667 (u16)*ptid, WLAN_BACK_TIMER,
1668 WLAN_REASON_QSTA_TIMEOUT);
1671 void ieee80211_sta_tear_down_BA_sessions(struct ieee80211_sub_if_data *sdata, u8 *addr)
1673 struct ieee80211_local *local = sdata->local;
1676 for (i = 0; i < STA_TID_NUM; i++) {
1677 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1678 WLAN_BACK_INITIATOR);
1679 ieee80211_sta_stop_rx_ba_session(sdata, addr, i,
1680 WLAN_BACK_RECIPIENT,
1681 WLAN_REASON_QSTA_LEAVE_QBSS);
1685 static void ieee80211_send_refuse_measurement_request(struct ieee80211_sub_if_data *sdata,
1686 struct ieee80211_msrment_ie *request_ie,
1687 const u8 *da, const u8 *bssid,
1690 struct ieee80211_local *local = sdata->local;
1691 struct sk_buff *skb;
1692 struct ieee80211_mgmt *msr_report;
1694 skb = dev_alloc_skb(sizeof(*msr_report) + local->hw.extra_tx_headroom +
1695 sizeof(struct ieee80211_msrment_ie));
1698 printk(KERN_ERR "%s: failed to allocate buffer for "
1699 "measurement report frame\n", sdata->dev->name);
1703 skb_reserve(skb, local->hw.extra_tx_headroom);
1704 msr_report = (struct ieee80211_mgmt *)skb_put(skb, 24);
1705 memset(msr_report, 0, 24);
1706 memcpy(msr_report->da, da, ETH_ALEN);
1707 memcpy(msr_report->sa, sdata->dev->dev_addr, ETH_ALEN);
1708 memcpy(msr_report->bssid, bssid, ETH_ALEN);
1709 msr_report->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1710 IEEE80211_STYPE_ACTION);
1712 skb_put(skb, 1 + sizeof(msr_report->u.action.u.measurement));
1713 msr_report->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
1714 msr_report->u.action.u.measurement.action_code =
1715 WLAN_ACTION_SPCT_MSR_RPRT;
1716 msr_report->u.action.u.measurement.dialog_token = dialog_token;
1718 msr_report->u.action.u.measurement.element_id = WLAN_EID_MEASURE_REPORT;
1719 msr_report->u.action.u.measurement.length =
1720 sizeof(struct ieee80211_msrment_ie);
1722 memset(&msr_report->u.action.u.measurement.msr_elem, 0,
1723 sizeof(struct ieee80211_msrment_ie));
1724 msr_report->u.action.u.measurement.msr_elem.token = request_ie->token;
1725 msr_report->u.action.u.measurement.msr_elem.mode |=
1726 IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED;
1727 msr_report->u.action.u.measurement.msr_elem.type = request_ie->type;
1729 ieee80211_sta_tx(sdata, skb, 0);
1732 static void ieee80211_sta_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1733 struct ieee80211_mgmt *mgmt,
1737 * Ignoring measurement request is spec violation.
1738 * Mandatory measurements must be reported optional
1739 * measurements might be refused or reported incapable
1740 * For now just refuse
1741 * TODO: Answer basic measurement as unmeasured
1743 ieee80211_send_refuse_measurement_request(sdata,
1744 &mgmt->u.action.u.measurement.msr_elem,
1745 mgmt->sa, mgmt->bssid,
1746 mgmt->u.action.u.measurement.dialog_token);
1750 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1751 struct ieee80211_if_sta *ifsta,
1752 struct ieee80211_mgmt *mgmt,
1755 u16 auth_alg, auth_transaction, status_code;
1756 DECLARE_MAC_BUF(mac);
1758 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
1759 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
1765 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1766 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1769 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1770 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1773 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1774 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1775 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1777 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1779 * IEEE 802.11 standard does not require authentication in IBSS
1780 * networks and most implementations do not seem to use it.
1781 * However, try to reply to authentication attempts if someone
1782 * has actually implemented this.
1784 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
1786 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
1789 if (auth_alg != ifsta->auth_alg ||
1790 auth_transaction != ifsta->auth_transaction)
1793 if (status_code != WLAN_STATUS_SUCCESS) {
1794 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1796 const int num_algs = ARRAY_SIZE(algs);
1798 algs[0] = algs[1] = algs[2] = 0xff;
1799 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1800 algs[0] = WLAN_AUTH_OPEN;
1801 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1802 algs[1] = WLAN_AUTH_SHARED_KEY;
1803 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1804 algs[2] = WLAN_AUTH_LEAP;
1805 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1807 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1811 for (i = 0; i < num_algs; i++) {
1813 if (pos >= num_algs)
1815 if (algs[pos] == ifsta->auth_alg ||
1818 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1819 !ieee80211_sta_wep_configured(sdata))
1821 ifsta->auth_alg = algs[pos];
1828 switch (ifsta->auth_alg) {
1829 case WLAN_AUTH_OPEN:
1830 case WLAN_AUTH_LEAP:
1831 ieee80211_auth_completed(sdata, ifsta);
1833 case WLAN_AUTH_SHARED_KEY:
1834 if (ifsta->auth_transaction == 4)
1835 ieee80211_auth_completed(sdata, ifsta);
1837 ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
1843 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1844 struct ieee80211_if_sta *ifsta,
1845 struct ieee80211_mgmt *mgmt,
1849 DECLARE_MAC_BUF(mac);
1854 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1857 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1859 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
1860 printk(KERN_DEBUG "%s: deauthenticated\n", sdata->dev->name);
1862 if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1863 ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
1864 ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1865 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1866 mod_timer(&ifsta->timer, jiffies +
1867 IEEE80211_RETRY_AUTH_INTERVAL);
1870 ieee80211_set_disassoc(sdata, ifsta, true, false, 0);
1871 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1875 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1876 struct ieee80211_if_sta *ifsta,
1877 struct ieee80211_mgmt *mgmt,
1881 DECLARE_MAC_BUF(mac);
1886 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1889 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1891 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1892 printk(KERN_DEBUG "%s: disassociated\n", sdata->dev->name);
1894 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1895 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
1896 mod_timer(&ifsta->timer, jiffies +
1897 IEEE80211_RETRY_AUTH_INTERVAL);
1900 ieee80211_set_disassoc(sdata, ifsta, false, false, 0);
1904 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1905 struct ieee80211_if_sta *ifsta,
1906 struct ieee80211_mgmt *mgmt,
1910 struct ieee80211_local *local = sdata->local;
1911 struct ieee80211_supported_band *sband;
1912 struct sta_info *sta;
1913 u64 rates, basic_rates;
1914 u16 capab_info, status_code, aid;
1915 struct ieee802_11_elems elems;
1916 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1919 DECLARE_MAC_BUF(mac);
1920 bool have_higher_than_11mbit = false;
1922 /* AssocResp and ReassocResp have identical structure, so process both
1923 * of them in this function. */
1925 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
1931 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1934 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1935 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1936 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1938 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1939 "status=%d aid=%d)\n",
1940 sdata->dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1941 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1943 if (status_code != WLAN_STATUS_SUCCESS) {
1944 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1945 sdata->dev->name, status_code);
1946 /* if this was a reassociation, ensure we try a "full"
1947 * association next time. This works around some broken APs
1948 * which do not correctly reject reassociation requests. */
1949 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1953 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1954 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1955 "set\n", sdata->dev->name, aid);
1956 aid &= ~(BIT(15) | BIT(14));
1958 pos = mgmt->u.assoc_resp.variable;
1959 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1961 if (!elems.supp_rates) {
1962 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1967 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1969 ifsta->ap_capab = capab_info;
1971 kfree(ifsta->assocresp_ies);
1972 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1973 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1974 if (ifsta->assocresp_ies)
1975 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1979 /* Add STA entry for the AP */
1980 sta = sta_info_get(local, ifsta->bssid);
1982 struct ieee80211_sta_bss *bss;
1985 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1987 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1988 " the AP\n", sdata->dev->name);
1992 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
1993 local->hw.conf.channel->center_freq,
1994 ifsta->ssid, ifsta->ssid_len);
1996 sta->last_signal = bss->signal;
1997 sta->last_qual = bss->qual;
1998 sta->last_noise = bss->noise;
1999 ieee80211_rx_bss_put(local, bss);
2002 err = sta_info_insert(sta);
2004 printk(KERN_DEBUG "%s: failed to insert STA entry for"
2005 " the AP (error %d)\n", sdata->dev->name, err);
2009 /* update new sta with its last rx activity */
2010 sta->last_rx = jiffies;
2014 * FIXME: Do we really need to update the sta_info's information here?
2015 * We already know about the AP (we found it in our list) so it
2016 * should already be filled with the right info, no?
2017 * As is stands, all this is racy because typically we assume
2018 * the information that is filled in here (except flags) doesn't
2019 * change while a STA structure is alive. As such, it should move
2020 * to between the sta_info_alloc() and sta_info_insert() above.
2023 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
2024 WLAN_STA_AUTHORIZED);
2028 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2030 for (i = 0; i < elems.supp_rates_len; i++) {
2031 int rate = (elems.supp_rates[i] & 0x7f) * 5;
2034 have_higher_than_11mbit = true;
2036 for (j = 0; j < sband->n_bitrates; j++) {
2037 if (sband->bitrates[j].bitrate == rate)
2039 if (elems.supp_rates[i] & 0x80)
2040 basic_rates |= BIT(j);
2044 for (i = 0; i < elems.ext_supp_rates_len; i++) {
2045 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
2048 have_higher_than_11mbit = true;
2050 for (j = 0; j < sband->n_bitrates; j++) {
2051 if (sband->bitrates[j].bitrate == rate)
2053 if (elems.ext_supp_rates[i] & 0x80)
2054 basic_rates |= BIT(j);
2058 sta->supp_rates[local->hw.conf.channel->band] = rates;
2059 sdata->basic_rates = basic_rates;
2061 /* cf. IEEE 802.11 9.2.12 */
2062 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2063 have_higher_than_11mbit)
2064 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2066 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
2068 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
2069 (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2070 struct ieee80211_ht_bss_info bss_info;
2071 ieee80211_ht_cap_ie_to_ht_info(
2072 (struct ieee80211_ht_cap *)
2073 elems.ht_cap_elem, &sta->ht_info);
2074 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2075 (struct ieee80211_ht_addt_info *)
2076 elems.ht_info_elem, &bss_info);
2077 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
2080 rate_control_rate_init(sta, local);
2082 if (elems.wmm_param) {
2083 set_sta_flags(sta, WLAN_STA_WME);
2085 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
2086 elems.wmm_param_len);
2090 /* set AID and assoc capability,
2091 * ieee80211_set_associated() will tell the driver */
2092 bss_conf->aid = aid;
2093 bss_conf->assoc_capability = capab_info;
2094 ieee80211_set_associated(sdata, ifsta);
2096 ieee80211_associated(sdata, ifsta);
2100 /* Caller must hold local->sta_bss_lock */
2101 static void __ieee80211_rx_bss_hash_add(struct ieee80211_local *local,
2102 struct ieee80211_sta_bss *bss)
2106 if (bss_mesh_cfg(bss))
2107 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2108 bss_mesh_id_len(bss));
2110 hash_idx = STA_HASH(bss->bssid);
2112 bss->hnext = local->sta_bss_hash[hash_idx];
2113 local->sta_bss_hash[hash_idx] = bss;
2117 /* Caller must hold local->sta_bss_lock */
2118 static void __ieee80211_rx_bss_hash_del(struct ieee80211_local *local,
2119 struct ieee80211_sta_bss *bss)
2121 struct ieee80211_sta_bss *b, *prev = NULL;
2122 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2126 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2129 prev->hnext = bss->hnext;
2138 static struct ieee80211_sta_bss *
2139 ieee80211_rx_bss_add(struct ieee80211_sub_if_data *sdata, u8 *bssid, int freq,
2140 u8 *ssid, u8 ssid_len)
2142 struct ieee80211_local *local = sdata->local;
2143 struct ieee80211_sta_bss *bss;
2145 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2148 atomic_inc(&bss->users);
2149 atomic_inc(&bss->users);
2150 memcpy(bss->bssid, bssid, ETH_ALEN);
2152 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2153 memcpy(bss->ssid, ssid, ssid_len);
2154 bss->ssid_len = ssid_len;
2157 spin_lock_bh(&local->sta_bss_lock);
2158 /* TODO: order by RSSI? */
2159 list_add_tail(&bss->list, &local->sta_bss_list);
2160 __ieee80211_rx_bss_hash_add(local, bss);
2161 spin_unlock_bh(&local->sta_bss_lock);
2165 static struct ieee80211_sta_bss *
2166 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
2167 u8 *ssid, u8 ssid_len)
2169 struct ieee80211_sta_bss *bss;
2171 spin_lock_bh(&local->sta_bss_lock);
2172 bss = local->sta_bss_hash[STA_HASH(bssid)];
2174 if (!bss_mesh_cfg(bss) &&
2175 !memcmp(bss->bssid, bssid, ETH_ALEN) &&
2176 bss->freq == freq &&
2177 bss->ssid_len == ssid_len &&
2178 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
2179 atomic_inc(&bss->users);
2184 spin_unlock_bh(&local->sta_bss_lock);
2188 #ifdef CONFIG_MAC80211_MESH
2189 static struct ieee80211_sta_bss *
2190 ieee80211_rx_mesh_bss_get(struct ieee80211_local *local, u8 *mesh_id, int mesh_id_len,
2191 u8 *mesh_cfg, int freq)
2193 struct ieee80211_sta_bss *bss;
2195 spin_lock_bh(&local->sta_bss_lock);
2196 bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2198 if (bss_mesh_cfg(bss) &&
2199 !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
2200 bss->freq == freq &&
2201 mesh_id_len == bss->mesh_id_len &&
2202 (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2204 atomic_inc(&bss->users);
2209 spin_unlock_bh(&local->sta_bss_lock);
2213 static struct ieee80211_sta_bss *
2214 ieee80211_rx_mesh_bss_add(struct ieee80211_local *local, u8 *mesh_id, int mesh_id_len,
2215 u8 *mesh_cfg, int mesh_config_len, int freq)
2217 struct ieee80211_sta_bss *bss;
2219 if (mesh_config_len != MESH_CFG_LEN)
2222 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2226 bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
2227 if (!bss->mesh_cfg) {
2232 if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2233 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2234 if (!bss->mesh_id) {
2235 kfree(bss->mesh_cfg);
2239 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2242 atomic_inc(&bss->users);
2243 atomic_inc(&bss->users);
2244 memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
2245 bss->mesh_id_len = mesh_id_len;
2247 spin_lock_bh(&local->sta_bss_lock);
2248 /* TODO: order by RSSI? */
2249 list_add_tail(&bss->list, &local->sta_bss_list);
2250 __ieee80211_rx_bss_hash_add(local, bss);
2251 spin_unlock_bh(&local->sta_bss_lock);
2256 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2259 kfree(bss_mesh_id(bss));
2260 kfree(bss_mesh_cfg(bss));
2265 static void ieee80211_rx_bss_put(struct ieee80211_local *local,
2266 struct ieee80211_sta_bss *bss)
2269 if (!atomic_dec_and_lock(&bss->users, &local->sta_bss_lock)) {
2274 __ieee80211_rx_bss_hash_del(local, bss);
2275 list_del(&bss->list);
2276 spin_unlock_bh(&local->sta_bss_lock);
2277 ieee80211_rx_bss_free(bss);
2281 void ieee80211_rx_bss_list_init(struct ieee80211_local *local)
2283 spin_lock_init(&local->sta_bss_lock);
2284 INIT_LIST_HEAD(&local->sta_bss_list);
2288 void ieee80211_rx_bss_list_deinit(struct ieee80211_local *local)
2290 struct ieee80211_sta_bss *bss, *tmp;
2292 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2293 ieee80211_rx_bss_put(local, bss);
2297 static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
2298 struct ieee80211_if_sta *ifsta,
2299 struct ieee80211_sta_bss *bss)
2301 struct ieee80211_local *local = sdata->local;
2302 int res, rates, i, j;
2303 struct sk_buff *skb;
2304 struct ieee80211_mgmt *mgmt;
2306 struct ieee80211_supported_band *sband;
2307 union iwreq_data wrqu;
2309 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2311 /* Remove possible STA entries from other IBSS networks. */
2312 sta_info_flush_delayed(sdata);
2314 if (local->ops->reset_tsf) {
2315 /* Reset own TSF to allow time synchronization work. */
2316 local->ops->reset_tsf(local_to_hw(local));
2318 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2319 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
2323 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2325 sdata->drop_unencrypted = bss->capability &
2326 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2328 res = ieee80211_set_freq(sdata, bss->freq);
2333 /* Build IBSS probe response */
2334 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2336 skb_reserve(skb, local->hw.extra_tx_headroom);
2338 mgmt = (struct ieee80211_mgmt *)
2339 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2340 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2341 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2342 IEEE80211_STYPE_PROBE_RESP);
2343 memset(mgmt->da, 0xff, ETH_ALEN);
2344 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
2345 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2346 mgmt->u.beacon.beacon_int =
2347 cpu_to_le16(local->hw.conf.beacon_int);
2348 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
2349 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2351 pos = skb_put(skb, 2 + ifsta->ssid_len);
2352 *pos++ = WLAN_EID_SSID;
2353 *pos++ = ifsta->ssid_len;
2354 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2356 rates = bss->supp_rates_len;
2359 pos = skb_put(skb, 2 + rates);
2360 *pos++ = WLAN_EID_SUPP_RATES;
2362 memcpy(pos, bss->supp_rates, rates);
2364 if (bss->band == IEEE80211_BAND_2GHZ) {
2365 pos = skb_put(skb, 2 + 1);
2366 *pos++ = WLAN_EID_DS_PARAMS;
2368 *pos++ = ieee80211_frequency_to_channel(bss->freq);
2371 pos = skb_put(skb, 2 + 2);
2372 *pos++ = WLAN_EID_IBSS_PARAMS;
2374 /* FIX: set ATIM window based on scan results */
2378 if (bss->supp_rates_len > 8) {
2379 rates = bss->supp_rates_len - 8;
2380 pos = skb_put(skb, 2 + rates);
2381 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2383 memcpy(pos, &bss->supp_rates[8], rates);
2386 ifsta->probe_resp = skb;
2388 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
2392 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2393 for (i = 0; i < bss->supp_rates_len; i++) {
2394 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2395 for (j = 0; j < sband->n_bitrates; j++)
2396 if (sband->bitrates[j].bitrate == bitrate)
2399 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2401 ieee80211_sta_def_wmm_params(sdata, bss, 1);
2403 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
2404 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2406 memset(&wrqu, 0, sizeof(wrqu));
2407 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
2408 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
2413 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2414 struct ieee802_11_elems *elems,
2415 enum ieee80211_band band)
2417 struct ieee80211_supported_band *sband;
2418 struct ieee80211_rate *bitrates;
2422 sband = local->hw.wiphy->bands[band];
2426 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2429 bitrates = sband->bitrates;
2430 num_rates = sband->n_bitrates;
2432 for (i = 0; i < elems->supp_rates_len +
2433 elems->ext_supp_rates_len; i++) {
2436 if (i < elems->supp_rates_len)
2437 rate = elems->supp_rates[i];
2438 else if (elems->ext_supp_rates)
2439 rate = elems->ext_supp_rates
2440 [i - elems->supp_rates_len];
2441 own_rate = 5 * (rate & 0x7f);
2442 for (j = 0; j < num_rates; j++)
2443 if (bitrates[j].bitrate == own_rate)
2444 supp_rates |= BIT(j);
2449 static u64 ieee80211_sta_get_mandatory_rates(struct ieee80211_local *local,
2450 enum ieee80211_band band)
2452 struct ieee80211_supported_band *sband;
2453 struct ieee80211_rate *bitrates;
2454 u64 mandatory_rates;
2455 enum ieee80211_rate_flags mandatory_flag;
2458 sband = local->hw.wiphy->bands[band];
2461 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2464 if (band == IEEE80211_BAND_2GHZ)
2465 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
2467 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
2469 bitrates = sband->bitrates;
2470 mandatory_rates = 0;
2471 for (i = 0; i < sband->n_bitrates; i++)
2472 if (bitrates[i].flags & mandatory_flag)
2473 mandatory_rates |= BIT(i);
2474 return mandatory_rates;
2477 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2478 struct ieee80211_mgmt *mgmt,
2480 struct ieee80211_rx_status *rx_status,
2481 struct ieee802_11_elems *elems)
2483 struct ieee80211_local *local = sdata->local;
2485 struct ieee80211_sta_bss *bss;
2486 struct sta_info *sta;
2487 struct ieee80211_channel *channel;
2488 u64 beacon_timestamp, rx_timestamp;
2490 bool beacon = ieee80211_is_beacon(mgmt->frame_control);
2491 enum ieee80211_band band = rx_status->band;
2492 DECLARE_MAC_BUF(mac);
2493 DECLARE_MAC_BUF(mac2);
2495 if (elems->ds_params && elems->ds_params_len == 1)
2496 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
2498 freq = rx_status->freq;
2500 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2502 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2505 if (ieee80211_vif_is_mesh(&sdata->vif) && elems->mesh_id &&
2506 elems->mesh_config && mesh_matches_local(elems, sdata)) {
2507 supp_rates = ieee80211_sta_get_rates(local, elems, band);
2509 mesh_neighbour_update(mgmt->sa, supp_rates, sdata,
2510 mesh_peer_accepts_plinks(elems));
2513 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems->supp_rates &&
2514 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
2515 supp_rates = ieee80211_sta_get_rates(local, elems, band);
2519 sta = sta_info_get(local, mgmt->sa);
2523 prev_rates = sta->supp_rates[band];
2524 /* make sure mandatory rates are always added */
2525 sta->supp_rates[band] = supp_rates |
2526 ieee80211_sta_get_mandatory_rates(local, band);
2528 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2529 if (sta->supp_rates[band] != prev_rates)
2530 printk(KERN_DEBUG "%s: updated supp_rates set "
2531 "for %s based on beacon info (0x%llx | "
2532 "0x%llx -> 0x%llx)\n",
2533 sdata->dev->name, print_mac(mac, sta->addr),
2534 (unsigned long long) prev_rates,
2535 (unsigned long long) supp_rates,
2536 (unsigned long long) sta->supp_rates[band]);
2539 ieee80211_ibss_add_sta(sdata, NULL, mgmt->bssid,
2540 mgmt->sa, supp_rates);
2546 #ifdef CONFIG_MAC80211_MESH
2547 if (elems->mesh_config)
2548 bss = ieee80211_rx_mesh_bss_get(local, elems->mesh_id,
2549 elems->mesh_id_len, elems->mesh_config, freq);
2552 bss = ieee80211_rx_bss_get(local, mgmt->bssid, freq,
2553 elems->ssid, elems->ssid_len);
2555 #ifdef CONFIG_MAC80211_MESH
2556 if (elems->mesh_config)
2557 bss = ieee80211_rx_mesh_bss_add(local, elems->mesh_id,
2558 elems->mesh_id_len, elems->mesh_config,
2559 elems->mesh_config_len, freq);
2562 bss = ieee80211_rx_bss_add(sdata, mgmt->bssid, freq,
2563 elems->ssid, elems->ssid_len);
2568 /* TODO: order by RSSI? */
2569 spin_lock_bh(&local->sta_bss_lock);
2570 list_move_tail(&bss->list, &local->sta_bss_list);
2571 spin_unlock_bh(&local->sta_bss_lock);
2575 /* save the ERP value so that it is available at association time */
2576 if (elems->erp_info && elems->erp_info_len >= 1) {
2577 bss->erp_value = elems->erp_info[0];
2578 bss->has_erp_value = 1;
2581 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2582 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2585 struct ieee80211_tim_ie *tim_ie =
2586 (struct ieee80211_tim_ie *)elems->tim;
2587 bss->dtim_period = tim_ie->dtim_period;
2590 /* set default value for buggy APs */
2591 if (!elems->tim || bss->dtim_period == 0)
2592 bss->dtim_period = 1;
2594 bss->supp_rates_len = 0;
2595 if (elems->supp_rates) {
2596 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2597 if (clen > elems->supp_rates_len)
2598 clen = elems->supp_rates_len;
2599 memcpy(&bss->supp_rates[bss->supp_rates_len], elems->supp_rates,
2601 bss->supp_rates_len += clen;
2603 if (elems->ext_supp_rates) {
2604 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2605 if (clen > elems->ext_supp_rates_len)
2606 clen = elems->ext_supp_rates_len;
2607 memcpy(&bss->supp_rates[bss->supp_rates_len],
2608 elems->ext_supp_rates, clen);
2609 bss->supp_rates_len += clen;
2614 beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2616 bss->timestamp = beacon_timestamp;
2617 bss->last_update = jiffies;
2618 bss->signal = rx_status->signal;
2619 bss->noise = rx_status->noise;
2620 bss->qual = rx_status->qual;
2622 bss->last_probe_resp = jiffies;
2624 * In STA mode, the remaining parameters should not be overridden
2625 * by beacons because they're not necessarily accurate there.
2627 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2628 bss->last_probe_resp && beacon) {
2629 ieee80211_rx_bss_put(local, bss);
2633 if (bss->ies == NULL || bss->ies_len < elems->total_len) {
2635 bss->ies = kmalloc(elems->total_len, GFP_ATOMIC);
2638 memcpy(bss->ies, elems->ie_start, elems->total_len);
2639 bss->ies_len = elems->total_len;
2643 bss->wmm_used = elems->wmm_param || elems->wmm_info;
2645 /* check if we need to merge IBSS */
2646 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2647 !local->sta_sw_scanning && !local->sta_hw_scanning &&
2648 bss->capability & WLAN_CAPABILITY_IBSS &&
2649 bss->freq == local->oper_channel->center_freq &&
2650 elems->ssid_len == sdata->u.sta.ssid_len &&
2651 memcmp(elems->ssid, sdata->u.sta.ssid,
2652 sdata->u.sta.ssid_len) == 0) {
2653 if (rx_status->flag & RX_FLAG_TSFT) {
2654 /* in order for correct IBSS merging we need mactime
2656 * since mactime is defined as the time the first data
2657 * symbol of the frame hits the PHY, and the timestamp
2658 * of the beacon is defined as "the time that the data
2659 * symbol containing the first bit of the timestamp is
2660 * transmitted to the PHY plus the transmitting STA’s
2661 * delays through its local PHY from the MAC-PHY
2662 * interface to its interface with the WM"
2663 * (802.11 11.1.2) - equals the time this bit arrives at
2664 * the receiver - we have to take into account the
2665 * offset between the two.
2666 * e.g: at 1 MBit that means mactime is 192 usec earlier
2667 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2669 int rate = local->hw.wiphy->bands[band]->
2670 bitrates[rx_status->rate_idx].bitrate;
2671 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2672 } else if (local && local->ops && local->ops->get_tsf)
2673 /* second best option: get current TSF */
2674 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2676 /* can't merge without knowing the TSF */
2677 rx_timestamp = -1LLU;
2678 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2679 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2680 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2681 print_mac(mac, mgmt->sa),
2682 print_mac(mac2, mgmt->bssid),
2683 (unsigned long long)rx_timestamp,
2684 (unsigned long long)beacon_timestamp,
2685 (unsigned long long)(rx_timestamp - beacon_timestamp),
2687 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2688 if (beacon_timestamp > rx_timestamp) {
2689 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2690 printk(KERN_DEBUG "%s: beacon TSF higher than "
2691 "local TSF - IBSS merge with BSSID %s\n",
2692 sdata->dev->name, print_mac(mac, mgmt->bssid));
2694 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
2695 ieee80211_ibss_add_sta(sdata, NULL,
2696 mgmt->bssid, mgmt->sa,
2701 ieee80211_rx_bss_put(local, bss);
2705 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2706 struct ieee80211_mgmt *mgmt,
2708 struct ieee80211_rx_status *rx_status)
2711 struct ieee802_11_elems elems;
2712 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2714 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
2715 return; /* ignore ProbeResp to foreign address */
2717 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2721 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2724 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2726 /* direct probe may be part of the association flow */
2727 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
2729 printk(KERN_DEBUG "%s direct probe responded\n",
2731 ieee80211_authenticate(sdata, ifsta);
2736 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2737 struct ieee80211_mgmt *mgmt,
2739 struct ieee80211_rx_status *rx_status)
2741 struct ieee80211_if_sta *ifsta;
2743 struct ieee802_11_elems elems;
2744 struct ieee80211_local *local = sdata->local;
2745 struct ieee80211_conf *conf = &local->hw.conf;
2748 /* Process beacon from the current BSS */
2749 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2753 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2755 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2757 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2759 ifsta = &sdata->u.sta;
2761 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2762 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2765 /* Do not send changes to driver if we are scanning. This removes
2766 * requirement that a driver's bss_info_changed/conf_tx functions
2767 * need to be atomic.
2768 * This is really ugly code, we should rewrite scanning and make
2769 * all this more understandable for humans.
2771 if (local->sta_sw_scanning || local->sta_hw_scanning)
2774 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
2775 elems.wmm_param_len);
2777 if (elems.erp_info && elems.erp_info_len >= 1)
2778 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2780 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
2781 changed |= ieee80211_handle_protect_preamb(sdata, false,
2782 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
2785 if (elems.ht_cap_elem && elems.ht_info_elem &&
2786 elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2787 struct ieee80211_ht_bss_info bss_info;
2789 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2790 (struct ieee80211_ht_addt_info *)
2791 elems.ht_info_elem, &bss_info);
2792 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2796 ieee80211_bss_info_change_notify(sdata, changed);
2800 static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
2801 struct ieee80211_if_sta *ifsta,
2802 struct ieee80211_mgmt *mgmt,
2804 struct ieee80211_rx_status *rx_status)
2806 struct ieee80211_local *local = sdata->local;
2808 struct sk_buff *skb;
2809 struct ieee80211_mgmt *resp;
2811 DECLARE_MAC_BUF(mac);
2812 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2813 DECLARE_MAC_BUF(mac2);
2814 DECLARE_MAC_BUF(mac3);
2817 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2818 ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
2819 len < 24 + 2 || !ifsta->probe_resp)
2822 if (local->ops->tx_last_beacon)
2823 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2827 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2828 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2829 "%s (tx_last_beacon=%d)\n",
2830 sdata->dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2831 print_mac(mac3, mgmt->bssid), tx_last_beacon);
2832 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2834 if (!tx_last_beacon)
2837 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2838 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2841 end = ((u8 *) mgmt) + len;
2842 pos = mgmt->u.probe_req.variable;
2843 if (pos[0] != WLAN_EID_SSID ||
2844 pos + 2 + pos[1] > end) {
2845 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2846 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2848 sdata->dev->name, print_mac(mac, mgmt->sa));
2853 (pos[1] != ifsta->ssid_len ||
2854 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2855 /* Ignore ProbeReq for foreign SSID */
2859 /* Reply with ProbeResp */
2860 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
2864 resp = (struct ieee80211_mgmt *) skb->data;
2865 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2866 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2867 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2868 sdata->dev->name, print_mac(mac, resp->da));
2869 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2870 ieee80211_sta_tx(sdata, skb, 0);
2873 static void ieee80211_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
2874 struct ieee80211_if_sta *ifsta,
2875 struct ieee80211_mgmt *mgmt,
2877 struct ieee80211_rx_status *rx_status)
2879 struct ieee80211_local *local = sdata->local;
2881 /* all categories we currently handle have action_code */
2882 if (len < IEEE80211_MIN_ACTION_SIZE + 1)
2885 switch (mgmt->u.action.category) {
2886 case WLAN_CATEGORY_SPECTRUM_MGMT:
2887 if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ)
2889 switch (mgmt->u.action.u.measurement.action_code) {
2890 case WLAN_ACTION_SPCT_MSR_REQ:
2891 if (len < (IEEE80211_MIN_ACTION_SIZE +
2892 sizeof(mgmt->u.action.u.measurement)))
2894 ieee80211_sta_process_measurement_req(sdata, mgmt, len);
2898 case WLAN_CATEGORY_BACK:
2899 switch (mgmt->u.action.u.addba_req.action_code) {
2900 case WLAN_ACTION_ADDBA_REQ:
2901 if (len < (IEEE80211_MIN_ACTION_SIZE +
2902 sizeof(mgmt->u.action.u.addba_req)))
2904 ieee80211_sta_process_addba_request(local, mgmt, len);
2906 case WLAN_ACTION_ADDBA_RESP:
2907 if (len < (IEEE80211_MIN_ACTION_SIZE +
2908 sizeof(mgmt->u.action.u.addba_resp)))
2910 ieee80211_sta_process_addba_resp(local, mgmt, len);
2912 case WLAN_ACTION_DELBA:
2913 if (len < (IEEE80211_MIN_ACTION_SIZE +
2914 sizeof(mgmt->u.action.u.delba)))
2916 ieee80211_sta_process_delba(sdata, mgmt, len);
2920 case PLINK_CATEGORY:
2921 if (ieee80211_vif_is_mesh(&sdata->vif))
2922 mesh_rx_plink_frame(sdata, mgmt, len, rx_status);
2924 case MESH_PATH_SEL_CATEGORY:
2925 if (ieee80211_vif_is_mesh(&sdata->vif))
2926 mesh_rx_path_sel_frame(sdata, mgmt, len);
2931 void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
2932 struct ieee80211_rx_status *rx_status)
2934 struct ieee80211_local *local = sdata->local;
2935 struct ieee80211_if_sta *ifsta;
2936 struct ieee80211_mgmt *mgmt;
2942 ifsta = &sdata->u.sta;
2944 mgmt = (struct ieee80211_mgmt *) skb->data;
2945 fc = le16_to_cpu(mgmt->frame_control);
2947 switch (fc & IEEE80211_FCTL_STYPE) {
2948 case IEEE80211_STYPE_PROBE_REQ:
2949 case IEEE80211_STYPE_PROBE_RESP:
2950 case IEEE80211_STYPE_BEACON:
2951 case IEEE80211_STYPE_ACTION:
2952 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2953 case IEEE80211_STYPE_AUTH:
2954 case IEEE80211_STYPE_ASSOC_RESP:
2955 case IEEE80211_STYPE_REASSOC_RESP:
2956 case IEEE80211_STYPE_DEAUTH:
2957 case IEEE80211_STYPE_DISASSOC:
2958 skb_queue_tail(&ifsta->skb_queue, skb);
2959 queue_work(local->hw.workqueue, &ifsta->work);
2967 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2968 struct sk_buff *skb)
2970 struct ieee80211_rx_status *rx_status;
2971 struct ieee80211_if_sta *ifsta;
2972 struct ieee80211_mgmt *mgmt;
2975 ifsta = &sdata->u.sta;
2977 rx_status = (struct ieee80211_rx_status *) skb->cb;
2978 mgmt = (struct ieee80211_mgmt *) skb->data;
2979 fc = le16_to_cpu(mgmt->frame_control);
2981 switch (fc & IEEE80211_FCTL_STYPE) {
2982 case IEEE80211_STYPE_PROBE_REQ:
2983 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len,
2986 case IEEE80211_STYPE_PROBE_RESP:
2987 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
2989 case IEEE80211_STYPE_BEACON:
2990 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2992 case IEEE80211_STYPE_AUTH:
2993 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
2995 case IEEE80211_STYPE_ASSOC_RESP:
2996 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
2998 case IEEE80211_STYPE_REASSOC_RESP:
2999 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
3001 case IEEE80211_STYPE_DEAUTH:
3002 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
3004 case IEEE80211_STYPE_DISASSOC:
3005 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
3007 case IEEE80211_STYPE_ACTION:
3008 ieee80211_rx_mgmt_action(sdata, ifsta, mgmt, skb->len, rx_status);
3017 ieee80211_sta_rx_scan(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
3018 struct ieee80211_rx_status *rx_status)
3020 struct ieee80211_mgmt *mgmt;
3024 return RX_DROP_UNUSABLE;
3026 mgmt = (struct ieee80211_mgmt *) skb->data;
3027 fc = mgmt->frame_control;
3029 if (ieee80211_is_ctl(fc))
3033 return RX_DROP_MONITOR;
3035 if (ieee80211_is_probe_resp(fc)) {
3036 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
3041 if (ieee80211_is_beacon(fc)) {
3042 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3051 static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
3053 struct ieee80211_local *local = sdata->local;
3055 struct sta_info *sta;
3059 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3060 if (sta->sdata == sdata &&
3061 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3074 static void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, unsigned long exp_time)
3076 struct ieee80211_local *local = sdata->local;
3077 struct sta_info *sta, *tmp;
3078 LIST_HEAD(tmp_list);
3079 DECLARE_MAC_BUF(mac);
3080 unsigned long flags;
3082 spin_lock_irqsave(&local->sta_lock, flags);
3083 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
3084 if (time_after(jiffies, sta->last_rx + exp_time)) {
3085 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3086 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
3087 sdata->dev->name, print_mac(mac, sta->addr));
3089 __sta_info_unlink(&sta);
3091 list_add(&sta->list, &tmp_list);
3093 spin_unlock_irqrestore(&local->sta_lock, flags);
3095 list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3096 sta_info_destroy(sta);
3100 static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
3101 struct ieee80211_if_sta *ifsta)
3103 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3105 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
3106 if (ieee80211_sta_active_ibss(sdata))
3109 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3110 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
3111 ieee80211_sta_req_scan(sdata, ifsta->ssid, ifsta->ssid_len);
3115 #ifdef CONFIG_MAC80211_MESH
3116 static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata,
3117 struct ieee80211_if_sta *ifsta)
3121 ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3122 mesh_path_expire(sdata);
3124 free_plinks = mesh_plink_availables(sdata);
3125 if (free_plinks != sdata->u.sta.accepting_plinks)
3126 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
3128 mod_timer(&ifsta->timer, jiffies +
3129 IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3133 void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
3135 struct ieee80211_if_sta *ifsta;
3136 ifsta = &sdata->u.sta;
3137 ifsta->state = IEEE80211_STA_MLME_MESH_UP;
3138 ieee80211_sta_timer((unsigned long)sdata);
3139 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
3144 void ieee80211_sta_timer(unsigned long data)
3146 struct ieee80211_sub_if_data *sdata =
3147 (struct ieee80211_sub_if_data *) data;
3148 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3149 struct ieee80211_local *local = sdata->local;
3151 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3152 queue_work(local->hw.workqueue, &ifsta->work);
3155 void ieee80211_sta_work(struct work_struct *work)
3157 struct ieee80211_sub_if_data *sdata =
3158 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3159 struct ieee80211_local *local = sdata->local;
3160 struct ieee80211_if_sta *ifsta;
3161 struct sk_buff *skb;
3163 if (!netif_running(sdata->dev))
3166 if (local->sta_sw_scanning || local->sta_hw_scanning)
3169 if (WARN_ON(sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3170 sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3171 sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT))
3173 ifsta = &sdata->u.sta;
3175 while ((skb = skb_dequeue(&ifsta->skb_queue)))
3176 ieee80211_sta_rx_queued_mgmt(sdata, skb);
3178 #ifdef CONFIG_MAC80211_MESH
3179 if (ifsta->preq_queue_len &&
3181 ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3182 mesh_path_start_discovery(sdata);
3185 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
3186 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
3187 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
3188 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3189 if (ifsta->scan_ssid_len)
3190 ieee80211_sta_start_scan(sdata, ifsta->scan_ssid, ifsta->scan_ssid_len);
3192 ieee80211_sta_start_scan(sdata, NULL, 0);
3196 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3197 if (ieee80211_sta_config_auth(sdata, ifsta))
3199 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3200 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3203 switch (ifsta->state) {
3204 case IEEE80211_STA_MLME_DISABLED:
3206 case IEEE80211_STA_MLME_DIRECT_PROBE:
3207 ieee80211_direct_probe(sdata, ifsta);
3209 case IEEE80211_STA_MLME_AUTHENTICATE:
3210 ieee80211_authenticate(sdata, ifsta);
3212 case IEEE80211_STA_MLME_ASSOCIATE:
3213 ieee80211_associate(sdata, ifsta);
3215 case IEEE80211_STA_MLME_ASSOCIATED:
3216 ieee80211_associated(sdata, ifsta);
3218 case IEEE80211_STA_MLME_IBSS_SEARCH:
3219 ieee80211_sta_find_ibss(sdata, ifsta);
3221 case IEEE80211_STA_MLME_IBSS_JOINED:
3222 ieee80211_sta_merge_ibss(sdata, ifsta);
3224 #ifdef CONFIG_MAC80211_MESH
3225 case IEEE80211_STA_MLME_MESH_UP:
3226 ieee80211_mesh_housekeeping(sdata, ifsta);
3234 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
3235 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3236 "mixed-cell disabled - disassociate\n", sdata->dev->name);
3238 ieee80211_set_disassoc(sdata, ifsta, false, true,
3239 WLAN_REASON_UNSPECIFIED);
3244 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
3245 struct ieee80211_if_sta *ifsta)
3247 struct ieee80211_local *local = sdata->local;
3249 if (local->ops->reset_tsf) {
3250 /* Reset own TSF to allow time synchronization work. */
3251 local->ops->reset_tsf(local_to_hw(local));
3254 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3257 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3258 ifsta->auth_alg = WLAN_AUTH_OPEN;
3259 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3260 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3261 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3262 ifsta->auth_alg = WLAN_AUTH_LEAP;
3264 ifsta->auth_alg = WLAN_AUTH_OPEN;
3265 ifsta->auth_transaction = -1;
3266 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3267 ifsta->assoc_scan_tries = 0;
3268 ifsta->direct_probe_tries = 0;
3269 ifsta->auth_tries = 0;
3270 ifsta->assoc_tries = 0;
3271 netif_carrier_off(sdata->dev);
3275 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
3276 struct ieee80211_if_sta *ifsta)
3278 struct ieee80211_local *local = sdata->local;
3280 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3283 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3284 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3285 (ifsta->flags & (IEEE80211_STA_SSID_SET |
3286 IEEE80211_STA_AUTO_SSID_SEL))) {
3288 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED)
3289 ieee80211_set_disassoc(sdata, ifsta, true, true,
3290 WLAN_REASON_DEAUTH_LEAVING);
3292 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3293 queue_work(local->hw.workqueue, &ifsta->work);
3297 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3298 const char *ssid, int ssid_len)
3300 int tmp, hidden_ssid;
3302 if (ssid_len == ifsta->ssid_len &&
3303 !memcmp(ifsta->ssid, ssid, ssid_len))
3306 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
3312 if (ssid[tmp] != '\0') {
3318 if (hidden_ssid && ifsta->ssid_len == ssid_len)
3321 if (ssid_len == 1 && ssid[0] == ' ')
3327 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
3328 struct ieee80211_if_sta *ifsta)
3330 struct ieee80211_local *local = sdata->local;
3331 struct ieee80211_sta_bss *bss, *selected = NULL;
3332 int top_rssi = 0, freq;
3334 spin_lock_bh(&local->sta_bss_lock);
3335 freq = local->oper_channel->center_freq;
3336 list_for_each_entry(bss, &local->sta_bss_list, list) {
3337 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3340 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3341 IEEE80211_STA_AUTO_BSSID_SEL |
3342 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
3343 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3344 !!sdata->default_key))
3347 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3351 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3352 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3355 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3356 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3359 if (!selected || top_rssi < bss->signal) {
3361 top_rssi = bss->signal;
3365 atomic_inc(&selected->users);
3366 spin_unlock_bh(&local->sta_bss_lock);
3369 ieee80211_set_freq(sdata, selected->freq);
3370 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3371 ieee80211_sta_set_ssid(sdata, selected->ssid,
3372 selected->ssid_len);
3373 ieee80211_sta_set_bssid(sdata, selected->bssid);
3374 ieee80211_sta_def_wmm_params(sdata, selected, 0);
3376 /* Send out direct probe if no probe resp was received or
3377 * the one we have is outdated
3379 if (!selected->last_probe_resp ||
3380 time_after(jiffies, selected->last_probe_resp
3381 + IEEE80211_SCAN_RESULT_EXPIRE))
3382 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
3384 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
3386 ieee80211_rx_bss_put(local, selected);
3387 ieee80211_sta_reset_auth(sdata, ifsta);
3390 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
3391 ifsta->assoc_scan_tries++;
3392 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3393 ieee80211_sta_start_scan(sdata, NULL, 0);
3395 ieee80211_sta_start_scan(sdata, ifsta->ssid,
3397 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
3398 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3400 ifsta->state = IEEE80211_STA_MLME_DISABLED;
3406 static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
3407 struct ieee80211_if_sta *ifsta)
3409 struct ieee80211_local *local = sdata->local;
3410 struct ieee80211_sta_bss *bss;
3411 struct ieee80211_supported_band *sband;
3412 u8 bssid[ETH_ALEN], *pos;
3415 DECLARE_MAC_BUF(mac);
3418 /* Easier testing, use fixed BSSID. */
3419 memset(bssid, 0xfe, ETH_ALEN);
3421 /* Generate random, not broadcast, locally administered BSSID. Mix in
3422 * own MAC address to make sure that devices that do not have proper
3423 * random number generator get different BSSID. */
3424 get_random_bytes(bssid, ETH_ALEN);
3425 for (i = 0; i < ETH_ALEN; i++)
3426 bssid[i] ^= sdata->dev->dev_addr[i];
3431 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3432 sdata->dev->name, print_mac(mac, bssid));
3434 bss = ieee80211_rx_bss_add(sdata, bssid,
3435 local->hw.conf.channel->center_freq,
3436 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3440 bss->band = local->hw.conf.channel->band;
3441 sband = local->hw.wiphy->bands[bss->band];
3443 if (local->hw.conf.beacon_int == 0)
3444 local->hw.conf.beacon_int = 100;
3445 bss->beacon_int = local->hw.conf.beacon_int;
3446 bss->last_update = jiffies;
3447 bss->capability = WLAN_CAPABILITY_IBSS;
3449 if (sdata->default_key)
3450 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3452 sdata->drop_unencrypted = 0;
3454 bss->supp_rates_len = sband->n_bitrates;
3455 pos = bss->supp_rates;
3456 for (i = 0; i < sband->n_bitrates; i++) {
3457 int rate = sband->bitrates[i].bitrate;
3458 *pos++ = (u8) (rate / 5);
3461 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3462 ieee80211_rx_bss_put(local, bss);
3467 static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
3468 struct ieee80211_if_sta *ifsta)
3470 struct ieee80211_local *local = sdata->local;
3471 struct ieee80211_sta_bss *bss;
3475 DECLARE_MAC_BUF(mac);
3476 DECLARE_MAC_BUF(mac2);
3478 if (ifsta->ssid_len == 0)
3481 active_ibss = ieee80211_sta_active_ibss(sdata);
3482 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3483 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3484 sdata->dev->name, active_ibss);
3485 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3486 spin_lock_bh(&local->sta_bss_lock);
3487 list_for_each_entry(bss, &local->sta_bss_list, list) {
3488 if (ifsta->ssid_len != bss->ssid_len ||
3489 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3490 || !(bss->capability & WLAN_CAPABILITY_IBSS))
3492 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3493 printk(KERN_DEBUG " bssid=%s found\n",
3494 print_mac(mac, bss->bssid));
3495 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3496 memcpy(bssid, bss->bssid, ETH_ALEN);
3498 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3501 spin_unlock_bh(&local->sta_bss_lock);
3503 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3505 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
3506 "%s\n", print_mac(mac, bssid),
3507 print_mac(mac2, ifsta->bssid));
3508 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3510 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3514 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
3515 search_freq = bss->freq;
3517 search_freq = local->hw.conf.channel->center_freq;
3519 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
3520 ifsta->ssid, ifsta->ssid_len);
3524 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3525 " based on configured SSID\n",
3526 sdata->dev->name, print_mac(mac, bssid));
3527 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3528 ieee80211_rx_bss_put(local, bss);
3533 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3534 printk(KERN_DEBUG " did not try to join ibss\n");
3535 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3537 /* Selected IBSS not found in current scan results - try to scan */
3538 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
3539 !ieee80211_sta_active_ibss(sdata)) {
3540 mod_timer(&ifsta->timer, jiffies +
3541 IEEE80211_IBSS_MERGE_INTERVAL);
3542 } else if (time_after(jiffies, local->last_scan_completed +
3543 IEEE80211_SCAN_INTERVAL)) {
3544 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3545 "join\n", sdata->dev->name);
3546 return ieee80211_sta_req_scan(sdata, ifsta->ssid,
3548 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
3549 int interval = IEEE80211_SCAN_INTERVAL;
3551 if (time_after(jiffies, ifsta->ibss_join_req +
3552 IEEE80211_IBSS_JOIN_TIMEOUT)) {
3553 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3554 (!(local->oper_channel->flags &
3555 IEEE80211_CHAN_NO_IBSS)))
3556 return ieee80211_sta_create_ibss(sdata, ifsta);
3557 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3558 printk(KERN_DEBUG "%s: IBSS not allowed on"
3559 " %d MHz\n", sdata->dev->name,
3560 local->hw.conf.channel->center_freq);
3563 /* No IBSS found - decrease scan interval and continue
3565 interval = IEEE80211_SCAN_INTERVAL_SLOW;
3568 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
3569 mod_timer(&ifsta->timer, jiffies + interval);
3577 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
3579 struct ieee80211_if_sta *ifsta;
3582 if (len > IEEE80211_MAX_SSID_LEN)
3585 ifsta = &sdata->u.sta;
3587 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
3588 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
3589 memcpy(ifsta->ssid, ssid, len);
3590 ifsta->ssid_len = len;
3591 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3595 * Hack! MLME code needs to be cleaned up to have different
3596 * entry points for configuration and internal selection change
3598 if (netif_running(sdata->dev))
3599 res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID);
3601 printk(KERN_DEBUG "%s: Failed to config new SSID to "
3602 "the low-level driver\n", sdata->dev->name);
3608 ifsta->flags |= IEEE80211_STA_SSID_SET;
3610 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3612 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3613 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3614 ifsta->ibss_join_req = jiffies;
3615 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
3616 return ieee80211_sta_find_ibss(sdata, ifsta);
3623 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
3625 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3626 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3627 *len = ifsta->ssid_len;
3632 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
3634 struct ieee80211_if_sta *ifsta;
3637 ifsta = &sdata->u.sta;
3639 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3640 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3643 * Hack! See also ieee80211_sta_set_ssid.
3645 if (netif_running(sdata->dev))
3646 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
3648 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3649 "the low-level driver\n", sdata->dev->name);
3654 if (is_valid_ether_addr(bssid))
3655 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3657 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3663 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3664 struct ieee80211_sub_if_data *sdata,
3667 struct sk_buff *skb;
3668 struct ieee80211_hdr *nullfunc;
3671 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3673 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3674 "frame\n", sdata->dev->name);
3677 skb_reserve(skb, local->hw.extra_tx_headroom);
3679 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3680 memset(nullfunc, 0, 24);
3681 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3682 IEEE80211_FCTL_TODS);
3684 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
3685 nullfunc->frame_control = fc;
3686 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3687 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3688 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3690 ieee80211_sta_tx(sdata, skb, 0);
3694 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3696 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3697 ieee80211_vif_is_mesh(&sdata->vif))
3698 ieee80211_sta_timer((unsigned long)sdata);
3701 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3703 struct ieee80211_local *local = hw_to_local(hw);
3704 struct net_device *dev = local->scan_dev;
3705 struct ieee80211_sub_if_data *sdata;
3706 union iwreq_data wrqu;
3708 local->last_scan_completed = jiffies;
3709 memset(&wrqu, 0, sizeof(wrqu));
3710 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3712 if (local->sta_hw_scanning) {
3713 local->sta_hw_scanning = 0;
3714 if (ieee80211_hw_config(local))
3715 printk(KERN_DEBUG "%s: failed to restore operational "
3716 "channel after scan\n", dev->name);
3717 /* Restart STA timer for HW scan case */
3719 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3720 ieee80211_restart_sta_timer(sdata);
3726 local->sta_sw_scanning = 0;
3727 if (ieee80211_hw_config(local))
3728 printk(KERN_DEBUG "%s: failed to restore operational "
3729 "channel after scan\n", dev->name);
3732 netif_tx_lock_bh(local->mdev);
3733 netif_addr_lock(local->mdev);
3734 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3735 local->ops->configure_filter(local_to_hw(local),
3736 FIF_BCN_PRBRESP_PROMISC,
3737 &local->filter_flags,
3738 local->mdev->mc_count,
3739 local->mdev->mc_list);
3741 netif_addr_unlock(local->mdev);
3742 netif_tx_unlock_bh(local->mdev);
3745 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3746 /* Tell AP we're back */
3747 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3748 sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3749 ieee80211_send_nullfunc(local, sdata, 0);
3751 ieee80211_restart_sta_timer(sdata);
3753 netif_wake_queue(sdata->dev);
3758 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3759 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3760 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3761 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3762 (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) &&
3763 !ieee80211_sta_active_ibss(sdata)))
3764 ieee80211_sta_find_ibss(sdata, ifsta);
3767 EXPORT_SYMBOL(ieee80211_scan_completed);
3769 void ieee80211_sta_scan_work(struct work_struct *work)
3771 struct ieee80211_local *local =
3772 container_of(work, struct ieee80211_local, scan_work.work);
3773 struct net_device *dev = local->scan_dev;
3774 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3775 struct ieee80211_supported_band *sband;
3776 struct ieee80211_channel *chan;
3778 unsigned long next_delay = 0;
3780 if (!local->sta_sw_scanning)
3783 switch (local->scan_state) {
3784 case SCAN_SET_CHANNEL:
3786 * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3787 * after we successfully scanned the last channel of the last
3788 * band (and the last band is supported by the hw)
3790 if (local->scan_band < IEEE80211_NUM_BANDS)
3791 sband = local->hw.wiphy->bands[local->scan_band];
3796 * If we are at an unsupported band and have more bands
3797 * left to scan, advance to the next supported one.
3799 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
3801 sband = local->hw.wiphy->bands[local->scan_band];
3802 local->scan_channel_idx = 0;
3805 /* if no more bands/channels left, complete scan */
3806 if (!sband || local->scan_channel_idx >= sband->n_channels) {
3807 ieee80211_scan_completed(local_to_hw(local));
3811 chan = &sband->channels[local->scan_channel_idx];
3813 if (chan->flags & IEEE80211_CHAN_DISABLED ||
3814 (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3815 chan->flags & IEEE80211_CHAN_NO_IBSS))
3819 local->scan_channel = chan;
3820 if (ieee80211_hw_config(local)) {
3821 printk(KERN_DEBUG "%s: failed to set freq to "
3822 "%d MHz for scan\n", dev->name,
3828 /* advance state machine to next channel/band */
3829 local->scan_channel_idx++;
3830 if (local->scan_channel_idx >= sband->n_channels) {
3832 * scan_band may end up == IEEE80211_NUM_BANDS, but
3833 * we'll catch that case above and complete the scan
3834 * if that is the case.
3837 local->scan_channel_idx = 0;
3843 next_delay = IEEE80211_PROBE_DELAY +
3844 usecs_to_jiffies(local->hw.channel_change_time);
3845 local->scan_state = SCAN_SEND_PROBE;
3847 case SCAN_SEND_PROBE:
3848 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3849 local->scan_state = SCAN_SET_CHANNEL;
3851 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3853 ieee80211_send_probe_req(sdata, NULL, local->scan_ssid,
3854 local->scan_ssid_len);
3855 next_delay = IEEE80211_CHANNEL_TIME;
3859 if (local->sta_sw_scanning)
3860 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3865 static int ieee80211_sta_start_scan(struct ieee80211_sub_if_data *scan_sdata,
3866 u8 *ssid, size_t ssid_len)
3868 struct ieee80211_local *local = scan_sdata->local;
3869 struct ieee80211_sub_if_data *sdata;
3871 if (ssid_len > IEEE80211_MAX_SSID_LEN)
3874 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
3875 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3878 * ScanType: ACTIVE, PASSIVE
3879 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3880 * a Probe frame during active scanning
3882 * MinChannelTime (>= ProbeDelay), in TU
3883 * MaxChannelTime: (>= MinChannelTime), in TU
3886 /* MLME-SCAN.confirm
3888 * ResultCode: SUCCESS, INVALID_PARAMETERS
3891 if (local->sta_sw_scanning || local->sta_hw_scanning) {
3892 if (local->scan_dev == scan_sdata->dev)
3897 if (local->ops->hw_scan) {
3898 int rc = local->ops->hw_scan(local_to_hw(local),
3901 local->sta_hw_scanning = 1;
3902 local->scan_dev = scan_sdata->dev;
3907 local->sta_sw_scanning = 1;
3910 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3911 netif_stop_queue(sdata->dev);
3912 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3913 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
3914 ieee80211_send_nullfunc(local, sdata, 1);
3919 local->scan_ssid_len = ssid_len;
3920 memcpy(local->scan_ssid, ssid, ssid_len);
3922 local->scan_ssid_len = 0;
3923 local->scan_state = SCAN_SET_CHANNEL;
3924 local->scan_channel_idx = 0;
3925 local->scan_band = IEEE80211_BAND_2GHZ;
3926 local->scan_dev = scan_sdata->dev;
3928 netif_addr_lock_bh(local->mdev);
3929 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3930 local->ops->configure_filter(local_to_hw(local),
3931 FIF_BCN_PRBRESP_PROMISC,
3932 &local->filter_flags,
3933 local->mdev->mc_count,
3934 local->mdev->mc_list);
3935 netif_addr_unlock_bh(local->mdev);
3937 /* TODO: start scan as soon as all nullfunc frames are ACKed */
3938 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3939 IEEE80211_CHANNEL_TIME);
3945 int ieee80211_sta_req_scan(struct ieee80211_sub_if_data *sdata, u8 *ssid, size_t ssid_len)
3947 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3948 struct ieee80211_local *local = sdata->local;
3950 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3951 return ieee80211_sta_start_scan(sdata, ssid, ssid_len);
3953 if (local->sta_sw_scanning || local->sta_hw_scanning) {
3954 if (local->scan_dev == sdata->dev)
3959 ifsta->scan_ssid_len = ssid_len;
3961 memcpy(ifsta->scan_ssid, ssid, ssid_len);
3962 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
3963 queue_work(local->hw.workqueue, &ifsta->work);
3968 static void ieee80211_sta_add_scan_ies(struct iw_request_info *info,
3969 struct ieee80211_sta_bss *bss,
3970 char **current_ev, char *end_buf)
3972 u8 *pos, *end, *next;
3973 struct iw_event iwe;
3975 if (bss == NULL || bss->ies == NULL)
3979 * If needed, fragment the IEs buffer (at IE boundaries) into short
3980 * enough fragments to fit into IW_GENERIC_IE_MAX octet messages.
3983 end = pos + bss->ies_len;
3985 while (end - pos > IW_GENERIC_IE_MAX) {
3986 next = pos + 2 + pos[1];
3987 while (next + 2 + next[1] - pos < IW_GENERIC_IE_MAX)
3988 next = next + 2 + next[1];
3990 memset(&iwe, 0, sizeof(iwe));
3991 iwe.cmd = IWEVGENIE;
3992 iwe.u.data.length = next - pos;
3993 *current_ev = iwe_stream_add_point(info, *current_ev,
3994 end_buf, &iwe, pos);
4000 memset(&iwe, 0, sizeof(iwe));
4001 iwe.cmd = IWEVGENIE;
4002 iwe.u.data.length = end - pos;
4003 *current_ev = iwe_stream_add_point(info, *current_ev,
4004 end_buf, &iwe, pos);
4010 ieee80211_sta_scan_result(struct ieee80211_local *local,
4011 struct iw_request_info *info,
4012 struct ieee80211_sta_bss *bss,
4013 char *current_ev, char *end_buf)
4015 struct iw_event iwe;
4017 if (time_after(jiffies,
4018 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
4021 memset(&iwe, 0, sizeof(iwe));
4022 iwe.cmd = SIOCGIWAP;
4023 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
4024 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
4025 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4028 memset(&iwe, 0, sizeof(iwe));
4029 iwe.cmd = SIOCGIWESSID;
4030 if (bss_mesh_cfg(bss)) {
4031 iwe.u.data.length = bss_mesh_id_len(bss);
4032 iwe.u.data.flags = 1;
4033 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4034 &iwe, bss_mesh_id(bss));
4036 iwe.u.data.length = bss->ssid_len;
4037 iwe.u.data.flags = 1;
4038 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4042 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
4043 || bss_mesh_cfg(bss)) {
4044 memset(&iwe, 0, sizeof(iwe));
4045 iwe.cmd = SIOCGIWMODE;
4046 if (bss_mesh_cfg(bss))
4047 iwe.u.mode = IW_MODE_MESH;
4048 else if (bss->capability & WLAN_CAPABILITY_ESS)
4049 iwe.u.mode = IW_MODE_MASTER;
4051 iwe.u.mode = IW_MODE_ADHOC;
4052 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
4053 &iwe, IW_EV_UINT_LEN);
4056 memset(&iwe, 0, sizeof(iwe));
4057 iwe.cmd = SIOCGIWFREQ;
4058 iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
4060 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4063 memset(&iwe, 0, sizeof(iwe));
4064 iwe.cmd = SIOCGIWFREQ;
4065 iwe.u.freq.m = bss->freq;
4067 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4069 memset(&iwe, 0, sizeof(iwe));
4071 iwe.u.qual.qual = bss->qual;
4072 iwe.u.qual.level = bss->signal;
4073 iwe.u.qual.noise = bss->noise;
4074 iwe.u.qual.updated = local->wstats_flags;
4075 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4078 memset(&iwe, 0, sizeof(iwe));
4079 iwe.cmd = SIOCGIWENCODE;
4080 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
4081 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4083 iwe.u.data.flags = IW_ENCODE_DISABLED;
4084 iwe.u.data.length = 0;
4085 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4088 ieee80211_sta_add_scan_ies(info, bss, ¤t_ev, end_buf);
4090 if (bss && bss->supp_rates_len > 0) {
4091 /* display all supported rates in readable format */
4092 char *p = current_ev + iwe_stream_lcp_len(info);
4095 memset(&iwe, 0, sizeof(iwe));
4096 iwe.cmd = SIOCGIWRATE;
4097 /* Those two flags are ignored... */
4098 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4100 for (i = 0; i < bss->supp_rates_len; i++) {
4101 iwe.u.bitrate.value = ((bss->supp_rates[i] &
4103 p = iwe_stream_add_value(info, current_ev, p,
4104 end_buf, &iwe, IW_EV_PARAM_LEN);
4111 buf = kmalloc(30, GFP_ATOMIC);
4113 memset(&iwe, 0, sizeof(iwe));
4114 iwe.cmd = IWEVCUSTOM;
4115 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4116 iwe.u.data.length = strlen(buf);
4117 current_ev = iwe_stream_add_point(info, current_ev,
4120 memset(&iwe, 0, sizeof(iwe));
4121 iwe.cmd = IWEVCUSTOM;
4122 sprintf(buf, " Last beacon: %dms ago",
4123 jiffies_to_msecs(jiffies - bss->last_update));
4124 iwe.u.data.length = strlen(buf);
4125 current_ev = iwe_stream_add_point(info, current_ev,
4126 end_buf, &iwe, buf);
4131 if (bss_mesh_cfg(bss)) {
4133 u8 *cfg = bss_mesh_cfg(bss);
4134 buf = kmalloc(50, GFP_ATOMIC);
4136 memset(&iwe, 0, sizeof(iwe));
4137 iwe.cmd = IWEVCUSTOM;
4138 sprintf(buf, "Mesh network (version %d)", cfg[0]);
4139 iwe.u.data.length = strlen(buf);
4140 current_ev = iwe_stream_add_point(info, current_ev,
4143 sprintf(buf, "Path Selection Protocol ID: "
4144 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4146 iwe.u.data.length = strlen(buf);
4147 current_ev = iwe_stream_add_point(info, current_ev,
4150 sprintf(buf, "Path Selection Metric ID: "
4151 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4153 iwe.u.data.length = strlen(buf);
4154 current_ev = iwe_stream_add_point(info, current_ev,
4157 sprintf(buf, "Congestion Control Mode ID: "
4158 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4160 iwe.u.data.length = strlen(buf);
4161 current_ev = iwe_stream_add_point(info, current_ev,
4164 sprintf(buf, "Channel Precedence: "
4165 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4167 iwe.u.data.length = strlen(buf);
4168 current_ev = iwe_stream_add_point(info, current_ev,
4179 int ieee80211_sta_scan_results(struct ieee80211_local *local,
4180 struct iw_request_info *info,
4181 char *buf, size_t len)
4183 char *current_ev = buf;
4184 char *end_buf = buf + len;
4185 struct ieee80211_sta_bss *bss;
4187 spin_lock_bh(&local->sta_bss_lock);
4188 list_for_each_entry(bss, &local->sta_bss_list, list) {
4189 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4190 spin_unlock_bh(&local->sta_bss_lock);
4193 current_ev = ieee80211_sta_scan_result(local, info, bss,
4194 current_ev, end_buf);
4196 spin_unlock_bh(&local->sta_bss_lock);
4197 return current_ev - buf;
4201 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
4203 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4205 kfree(ifsta->extra_ie);
4207 ifsta->extra_ie = NULL;
4208 ifsta->extra_ie_len = 0;
4211 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4212 if (!ifsta->extra_ie) {
4213 ifsta->extra_ie_len = 0;
4216 memcpy(ifsta->extra_ie, ie, len);
4217 ifsta->extra_ie_len = len;
4222 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
4223 struct sk_buff *skb, u8 *bssid,
4224 u8 *addr, u64 supp_rates)
4226 struct ieee80211_local *local = sdata->local;
4227 struct sta_info *sta;
4228 DECLARE_MAC_BUF(mac);
4229 int band = local->hw.conf.channel->band;
4231 /* TODO: Could consider removing the least recently used entry and
4232 * allow new one to be added. */
4233 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4234 if (net_ratelimit()) {
4235 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
4236 "entry %s\n", sdata->dev->name, print_mac(mac, addr));
4241 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
4244 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
4245 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
4246 wiphy_name(local->hw.wiphy), print_mac(mac, addr), sdata->dev->name);
4249 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4253 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
4255 /* make sure mandatory rates are always added */
4256 sta->supp_rates[band] = supp_rates |
4257 ieee80211_sta_get_mandatory_rates(local, band);
4259 rate_control_rate_init(sta, local);
4261 if (sta_info_insert(sta))
4268 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
4270 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4272 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
4273 sdata->dev->name, reason);
4275 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4276 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
4279 ieee80211_set_disassoc(sdata, ifsta, true, true, reason);
4284 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
4286 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4288 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
4289 sdata->dev->name, reason);
4291 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4294 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
4297 ieee80211_set_disassoc(sdata, ifsta, false, true, reason);
4301 void ieee80211_notify_mac(struct ieee80211_hw *hw,
4302 enum ieee80211_notification_types notif_type)
4304 struct ieee80211_local *local = hw_to_local(hw);
4305 struct ieee80211_sub_if_data *sdata;
4307 switch (notif_type) {
4308 case IEEE80211_NOTIFY_RE_ASSOC:
4310 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4311 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4314 ieee80211_sta_req_auth(sdata, &sdata->u.sta);
4320 EXPORT_SYMBOL(ieee80211_notify_mac);