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 action 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 void ieee802_11_parse_elems(u8 *start, size_t len,
95 struct ieee802_11_elems *elems)
100 memset(elems, 0, sizeof(*elems));
115 elems->ssid_len = elen;
117 case WLAN_EID_SUPP_RATES:
118 elems->supp_rates = pos;
119 elems->supp_rates_len = elen;
121 case WLAN_EID_FH_PARAMS:
122 elems->fh_params = pos;
123 elems->fh_params_len = elen;
125 case WLAN_EID_DS_PARAMS:
126 elems->ds_params = pos;
127 elems->ds_params_len = elen;
129 case WLAN_EID_CF_PARAMS:
130 elems->cf_params = pos;
131 elems->cf_params_len = elen;
135 elems->tim_len = elen;
137 case WLAN_EID_IBSS_PARAMS:
138 elems->ibss_params = pos;
139 elems->ibss_params_len = elen;
141 case WLAN_EID_CHALLENGE:
142 elems->challenge = pos;
143 elems->challenge_len = elen;
146 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
148 /* Microsoft OUI (00:50:F2) */
150 /* OUI Type 1 - WPA IE */
152 elems->wpa_len = elen;
153 } else if (elen >= 5 && pos[3] == 2) {
155 elems->wmm_info = pos;
156 elems->wmm_info_len = elen;
157 } else if (pos[4] == 1) {
158 elems->wmm_param = pos;
159 elems->wmm_param_len = elen;
166 elems->rsn_len = elen;
168 case WLAN_EID_ERP_INFO:
169 elems->erp_info = pos;
170 elems->erp_info_len = elen;
172 case WLAN_EID_EXT_SUPP_RATES:
173 elems->ext_supp_rates = pos;
174 elems->ext_supp_rates_len = elen;
176 case WLAN_EID_HT_CAPABILITY:
177 elems->ht_cap_elem = pos;
178 elems->ht_cap_elem_len = elen;
180 case WLAN_EID_HT_EXTRA_INFO:
181 elems->ht_info_elem = pos;
182 elems->ht_info_elem_len = elen;
184 case WLAN_EID_MESH_ID:
185 elems->mesh_id = pos;
186 elems->mesh_id_len = elen;
188 case WLAN_EID_MESH_CONFIG:
189 elems->mesh_config = pos;
190 elems->mesh_config_len = elen;
192 case WLAN_EID_PEER_LINK:
193 elems->peer_link = pos;
194 elems->peer_link_len = elen;
198 elems->preq_len = elen;
202 elems->prep_len = elen;
206 elems->perr_len = elen;
208 case WLAN_EID_CHANNEL_SWITCH:
209 elems->ch_switch_elem = pos;
210 elems->ch_switch_elem_len = elen;
213 if (!elems->quiet_elem) {
214 elems->quiet_elem = pos;
215 elems->quiet_elem_len = elen;
217 elems->num_of_quiet_elem++;
219 case WLAN_EID_COUNTRY:
220 elems->country_elem = pos;
221 elems->country_elem_len = elen;
223 case WLAN_EID_PWR_CONSTRAINT:
224 elems->pwr_constr_elem = pos;
225 elems->pwr_constr_elem_len = elen;
237 static int ecw2cw(int ecw)
239 return (1 << ecw) - 1;
243 static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
244 struct ieee80211_sta_bss *bss,
247 struct ieee80211_local *local = sdata->local;
248 int i, have_higher_than_11mbit = 0;
251 /* cf. IEEE 802.11 9.2.12 */
252 for (i = 0; i < bss->supp_rates_len; i++)
253 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
254 have_higher_than_11mbit = 1;
256 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
257 have_higher_than_11mbit)
258 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
260 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
263 if (local->ops->conf_tx) {
264 struct ieee80211_tx_queue_params qparam;
266 memset(&qparam, 0, sizeof(qparam));
270 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
271 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
276 qparam.cw_max = 1023;
279 for (i = 0; i < local_to_hw(local)->queues; i++)
280 local->ops->conf_tx(local_to_hw(local), i, &qparam);
284 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
285 struct ieee80211_if_sta *ifsta,
286 u8 *wmm_param, size_t wmm_param_len)
288 struct ieee80211_tx_queue_params params;
293 if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
299 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
301 count = wmm_param[6] & 0x0f;
302 if (count == ifsta->wmm_last_param_set)
304 ifsta->wmm_last_param_set = count;
307 left = wmm_param_len - 8;
309 memset(¶ms, 0, sizeof(params));
311 if (!local->ops->conf_tx)
315 for (; left >= 4; left -= 4, pos += 4) {
316 int aci = (pos[0] >> 5) & 0x03;
317 int acm = (pos[0] >> 4) & 0x01;
324 local->wmm_acm |= BIT(0) | BIT(3);
329 local->wmm_acm |= BIT(4) | BIT(5);
334 local->wmm_acm |= BIT(6) | BIT(7);
340 local->wmm_acm |= BIT(1) | BIT(2);
344 params.aifs = pos[0] & 0x0f;
345 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
346 params.cw_min = ecw2cw(pos[1] & 0x0f);
347 params.txop = get_unaligned_le16(pos + 2);
348 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
349 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
350 "cWmin=%d cWmax=%d txop=%d\n",
351 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
352 params.cw_max, params.txop);
354 /* TODO: handle ACM (block TX, fallback to next lowest allowed
356 if (local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) {
357 printk(KERN_DEBUG "%s: failed to set TX queue "
358 "parameters for queue %d\n", local->mdev->name, queue);
363 static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
365 bool use_short_preamble)
367 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
368 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
369 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
370 DECLARE_MAC_BUF(mac);
374 if (use_protection != bss_conf->use_cts_prot) {
375 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
376 if (net_ratelimit()) {
377 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
380 use_protection ? "enabled" : "disabled",
381 print_mac(mac, ifsta->bssid));
384 bss_conf->use_cts_prot = use_protection;
385 changed |= BSS_CHANGED_ERP_CTS_PROT;
388 if (use_short_preamble != bss_conf->use_short_preamble) {
389 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
390 if (net_ratelimit()) {
391 printk(KERN_DEBUG "%s: switched to %s barker preamble"
394 use_short_preamble ? "short" : "long",
395 print_mac(mac, ifsta->bssid));
398 bss_conf->use_short_preamble = use_short_preamble;
399 changed |= BSS_CHANGED_ERP_PREAMBLE;
405 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
408 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
409 bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
411 return ieee80211_handle_protect_preamb(sdata,
412 use_protection, use_short_preamble);
415 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
416 struct ieee80211_sta_bss *bss)
420 if (bss->has_erp_value)
421 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
423 u16 capab = bss->capability;
424 changed |= ieee80211_handle_protect_preamb(sdata, false,
425 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
431 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
432 struct ieee80211_ht_info *ht_info)
438 memset(ht_info, 0, sizeof(*ht_info));
441 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
443 ht_info->ht_supported = 1;
444 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
445 ht_info->ampdu_factor =
446 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
447 ht_info->ampdu_density =
448 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
449 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
451 ht_info->ht_supported = 0;
456 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
457 struct ieee80211_ht_addt_info *ht_add_info_ie,
458 struct ieee80211_ht_bss_info *bss_info)
460 if (bss_info == NULL)
463 memset(bss_info, 0, sizeof(*bss_info));
465 if (ht_add_info_ie) {
467 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
469 bss_info->primary_channel = ht_add_info_ie->control_chan;
470 bss_info->bss_cap = ht_add_info_ie->ht_param;
471 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
477 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata,
478 struct ieee80211_if_sta *ifsta)
483 union iwreq_data wrqu;
485 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
488 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
489 ifsta->assocresp_ies_len), GFP_KERNEL);
493 len = sprintf(buf, "ASSOCINFO(");
494 if (ifsta->assocreq_ies) {
495 len += sprintf(buf + len, "ReqIEs=");
496 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
497 len += sprintf(buf + len, "%02x",
498 ifsta->assocreq_ies[i]);
501 if (ifsta->assocresp_ies) {
502 if (ifsta->assocreq_ies)
503 len += sprintf(buf + len, " ");
504 len += sprintf(buf + len, "RespIEs=");
505 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
506 len += sprintf(buf + len, "%02x",
507 ifsta->assocresp_ies[i]);
510 len += sprintf(buf + len, ")");
512 if (len > IW_CUSTOM_MAX) {
513 len = sprintf(buf, "ASSOCRESPIE=");
514 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
515 len += sprintf(buf + len, "%02x",
516 ifsta->assocresp_ies[i]);
520 memset(&wrqu, 0, sizeof(wrqu));
521 wrqu.data.length = len;
522 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
528 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
529 struct ieee80211_if_sta *ifsta,
532 struct ieee80211_local *local = sdata->local;
533 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
534 union iwreq_data wrqu;
535 u32 changed = BSS_CHANGED_ASSOC;
538 struct ieee80211_sta_bss *bss;
540 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
542 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
545 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
546 conf->channel->center_freq,
547 ifsta->ssid, ifsta->ssid_len);
549 /* set timing information */
550 sdata->bss_conf.beacon_int = bss->beacon_int;
551 sdata->bss_conf.timestamp = bss->timestamp;
552 sdata->bss_conf.dtim_period = bss->dtim_period;
554 changed |= ieee80211_handle_bss_capability(sdata, bss);
556 ieee80211_rx_bss_put(local, bss);
559 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
560 changed |= BSS_CHANGED_HT;
561 sdata->bss_conf.assoc_ht = 1;
562 sdata->bss_conf.ht_conf = &conf->ht_conf;
563 sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
566 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
567 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
568 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
569 ieee80211_sta_send_associnfo(sdata, ifsta);
571 netif_carrier_off(sdata->dev);
572 ieee80211_sta_tear_down_BA_sessions(sdata, ifsta->bssid);
573 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
574 changed |= ieee80211_reset_erp_info(sdata);
576 sdata->bss_conf.assoc_ht = 0;
577 sdata->bss_conf.ht_conf = NULL;
578 sdata->bss_conf.ht_bss_conf = NULL;
580 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
582 ifsta->last_probe = jiffies;
583 ieee80211_led_assoc(local, assoc);
585 sdata->bss_conf.assoc = assoc;
586 ieee80211_bss_info_change_notify(sdata, changed);
589 netif_carrier_on(sdata->dev);
591 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
592 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
595 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
596 struct ieee80211_if_sta *ifsta, int deauth)
599 ifsta->auth_tries = 0;
600 ifsta->assoc_scan_tries = 0;
601 ifsta->assoc_tries = 0;
602 ieee80211_set_associated(sdata, ifsta, 0);
605 void ieee80211_sta_tx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
608 skb->dev = sdata->local->mdev;
609 skb_set_mac_header(skb, 0);
610 skb_set_network_header(skb, 0);
611 skb_set_transport_header(skb, 0);
613 skb->iif = sdata->dev->ifindex;
614 skb->do_not_encrypt = !encrypt;
620 static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
621 struct ieee80211_if_sta *ifsta,
622 int transaction, u8 *extra, size_t extra_len,
625 struct ieee80211_local *local = sdata->local;
627 struct ieee80211_mgmt *mgmt;
629 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
630 sizeof(*mgmt) + 6 + extra_len);
632 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
633 "frame\n", sdata->dev->name);
636 skb_reserve(skb, local->hw.extra_tx_headroom);
638 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
639 memset(mgmt, 0, 24 + 6);
640 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
641 IEEE80211_STYPE_AUTH);
643 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
644 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
645 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
646 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
647 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
648 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
649 ifsta->auth_transaction = transaction + 1;
650 mgmt->u.auth.status_code = cpu_to_le16(0);
652 memcpy(skb_put(skb, extra_len), extra, extra_len);
654 ieee80211_sta_tx(sdata, skb, encrypt);
658 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
659 struct ieee80211_if_sta *ifsta)
661 DECLARE_MAC_BUF(mac);
664 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
665 printk(KERN_DEBUG "%s: authentication with AP %s"
667 sdata->dev->name, print_mac(mac, ifsta->bssid));
668 ifsta->state = IEEE80211_STA_MLME_DISABLED;
672 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
673 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
674 sdata->dev->name, print_mac(mac, ifsta->bssid));
676 ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
678 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
681 static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss,
682 struct ieee80211_supported_band *sband,
688 for (i = 0; i < bss->supp_rates_len; i++) {
689 int rate = (bss->supp_rates[i] & 0x7F) * 5;
691 for (j = 0; j < sband->n_bitrates; j++)
692 if (sband->bitrates[j].bitrate == rate) {
702 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
703 struct ieee80211_if_sta *ifsta)
705 struct ieee80211_local *local = sdata->local;
707 struct ieee80211_mgmt *mgmt;
709 int i, len, count, rates_len, supp_rates_len;
711 struct ieee80211_sta_bss *bss;
713 struct ieee80211_supported_band *sband;
716 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
717 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
720 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
721 "frame\n", sdata->dev->name);
724 skb_reserve(skb, local->hw.extra_tx_headroom);
726 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
728 capab = ifsta->capab;
730 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
731 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
732 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
733 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
734 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
737 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
738 local->hw.conf.channel->center_freq,
739 ifsta->ssid, ifsta->ssid_len);
741 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
742 capab |= WLAN_CAPABILITY_PRIVACY;
746 /* get all rates supported by the device and the AP as
747 * some APs don't like getting a superset of their rates
748 * in the association request (e.g. D-Link DAP 1353 in
750 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
752 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
753 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
754 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
756 ieee80211_rx_bss_put(local, bss);
759 rates_len = sband->n_bitrates;
762 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
764 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
765 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
766 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
768 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
770 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
771 IEEE80211_STYPE_REASSOC_REQ);
772 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
773 mgmt->u.reassoc_req.listen_interval =
774 cpu_to_le16(local->hw.conf.listen_interval);
775 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
779 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
780 IEEE80211_STYPE_ASSOC_REQ);
781 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
782 mgmt->u.reassoc_req.listen_interval =
783 cpu_to_le16(local->hw.conf.listen_interval);
787 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
788 *pos++ = WLAN_EID_SSID;
789 *pos++ = ifsta->ssid_len;
790 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
792 /* add all rates which were marked to be used above */
793 supp_rates_len = rates_len;
794 if (supp_rates_len > 8)
797 len = sband->n_bitrates;
798 pos = skb_put(skb, supp_rates_len + 2);
799 *pos++ = WLAN_EID_SUPP_RATES;
800 *pos++ = supp_rates_len;
803 for (i = 0; i < sband->n_bitrates; i++) {
804 if (BIT(i) & rates) {
805 int rate = sband->bitrates[i].bitrate;
806 *pos++ = (u8) (rate / 5);
813 pos = skb_put(skb, rates_len - count + 2);
814 *pos++ = WLAN_EID_EXT_SUPP_RATES;
815 *pos++ = rates_len - count;
817 for (i++; i < sband->n_bitrates; i++) {
818 if (BIT(i) & rates) {
819 int rate = sband->bitrates[i].bitrate;
820 *pos++ = (u8) (rate / 5);
825 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
826 /* 1. power capabilities */
827 pos = skb_put(skb, 4);
828 *pos++ = WLAN_EID_PWR_CAPABILITY;
830 *pos++ = 0; /* min tx power */
831 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
833 /* 2. supported channels */
834 /* TODO: get this in reg domain format */
835 pos = skb_put(skb, 2 * sband->n_channels + 2);
836 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
837 *pos++ = 2 * sband->n_channels;
838 for (i = 0; i < sband->n_channels; i++) {
839 *pos++ = ieee80211_frequency_to_channel(
840 sband->channels[i].center_freq);
841 *pos++ = 1; /* one channel in the subband*/
845 if (ifsta->extra_ie) {
846 pos = skb_put(skb, ifsta->extra_ie_len);
847 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
850 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
851 pos = skb_put(skb, 9);
852 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
853 *pos++ = 7; /* len */
854 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
857 *pos++ = 2; /* WME */
858 *pos++ = 0; /* WME info */
859 *pos++ = 1; /* WME ver */
863 /* wmm support is a must to HT */
864 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
865 sband->ht_info.ht_supported && bss->ht_add_ie) {
866 struct ieee80211_ht_addt_info *ht_add_info =
867 (struct ieee80211_ht_addt_info *)bss->ht_add_ie;
868 u16 cap = sband->ht_info.cap;
870 u32 flags = local->hw.conf.channel->flags;
872 switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) {
873 case IEEE80211_HT_IE_CHA_SEC_ABOVE:
874 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
875 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
876 cap &= ~IEEE80211_HT_CAP_SGI_40;
879 case IEEE80211_HT_IE_CHA_SEC_BELOW:
880 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
881 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
882 cap &= ~IEEE80211_HT_CAP_SGI_40;
887 tmp = cpu_to_le16(cap);
888 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
889 *pos++ = WLAN_EID_HT_CAPABILITY;
890 *pos++ = sizeof(struct ieee80211_ht_cap);
891 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
892 memcpy(pos, &tmp, sizeof(u16));
894 /* TODO: needs a define here for << 2 */
895 *pos++ = sband->ht_info.ampdu_factor |
896 (sband->ht_info.ampdu_density << 2);
897 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
900 kfree(ifsta->assocreq_ies);
901 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
902 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
903 if (ifsta->assocreq_ies)
904 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
906 ieee80211_sta_tx(sdata, skb, 0);
910 static void ieee80211_send_deauth(struct ieee80211_sub_if_data *sdata,
911 struct ieee80211_if_sta *ifsta, u16 reason)
913 struct ieee80211_local *local = sdata->local;
915 struct ieee80211_mgmt *mgmt;
917 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
919 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
920 "frame\n", sdata->dev->name);
923 skb_reserve(skb, local->hw.extra_tx_headroom);
925 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
927 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
928 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
929 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
930 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
931 IEEE80211_STYPE_DEAUTH);
933 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
935 ieee80211_sta_tx(sdata, skb, 0);
939 static void ieee80211_send_disassoc(struct ieee80211_sub_if_data *sdata,
940 struct ieee80211_if_sta *ifsta, u16 reason)
942 struct ieee80211_local *local = sdata->local;
944 struct ieee80211_mgmt *mgmt;
946 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
948 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
949 "frame\n", sdata->dev->name);
952 skb_reserve(skb, local->hw.extra_tx_headroom);
954 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
956 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
957 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
958 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
959 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
960 IEEE80211_STYPE_DISASSOC);
962 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
964 ieee80211_sta_tx(sdata, skb, 0);
968 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
969 struct ieee80211_if_sta *ifsta)
971 struct ieee80211_local *local = sdata->local;
972 struct ieee80211_sta_bss *bss;
977 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
980 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
981 local->hw.conf.channel->center_freq,
982 ifsta->ssid, ifsta->ssid_len);
986 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
987 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
988 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
990 ieee80211_rx_bss_put(local, bss);
992 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
999 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
1000 struct ieee80211_if_sta *ifsta)
1002 DECLARE_MAC_BUF(mac);
1004 ifsta->assoc_tries++;
1005 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
1006 printk(KERN_DEBUG "%s: association with AP %s"
1008 sdata->dev->name, print_mac(mac, ifsta->bssid));
1009 ifsta->state = IEEE80211_STA_MLME_DISABLED;
1013 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
1014 printk(KERN_DEBUG "%s: associate with AP %s\n",
1015 sdata->dev->name, print_mac(mac, ifsta->bssid));
1016 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
1017 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
1018 "mixed-cell disabled - abort association\n", sdata->dev->name);
1019 ifsta->state = IEEE80211_STA_MLME_DISABLED;
1023 ieee80211_send_assoc(sdata, ifsta);
1025 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1029 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
1030 struct ieee80211_if_sta *ifsta)
1032 struct ieee80211_local *local = sdata->local;
1033 struct sta_info *sta;
1035 DECLARE_MAC_BUF(mac);
1037 /* TODO: start monitoring current AP signal quality and number of
1038 * missed beacons. Scan other channels every now and then and search
1039 * for better APs. */
1040 /* TODO: remove expired BSSes */
1042 ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
1046 sta = sta_info_get(local, ifsta->bssid);
1048 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
1049 sdata->dev->name, print_mac(mac, ifsta->bssid));
1053 if (time_after(jiffies,
1054 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
1055 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
1056 printk(KERN_DEBUG "%s: No ProbeResp from "
1057 "current AP %s - assume out of "
1059 sdata->dev->name, print_mac(mac, ifsta->bssid));
1061 sta_info_unlink(&sta);
1063 ieee80211_send_probe_req(sdata, ifsta->bssid,
1065 local->scan_ssid_len);
1066 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
1068 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1069 if (time_after(jiffies, ifsta->last_probe +
1070 IEEE80211_PROBE_INTERVAL)) {
1071 ifsta->last_probe = jiffies;
1072 ieee80211_send_probe_req(sdata, ifsta->bssid,
1081 if (disassoc && sta)
1082 sta_info_destroy(sta);
1085 ifsta->state = IEEE80211_STA_MLME_DISABLED;
1086 ieee80211_set_associated(sdata, ifsta, 0);
1088 mod_timer(&ifsta->timer, jiffies +
1089 IEEE80211_MONITORING_INTERVAL);
1094 static void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1095 u8 *ssid, size_t ssid_len)
1097 struct ieee80211_local *local = sdata->local;
1098 struct ieee80211_supported_band *sband;
1099 struct sk_buff *skb;
1100 struct ieee80211_mgmt *mgmt;
1101 u8 *pos, *supp_rates, *esupp_rates = NULL;
1104 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
1106 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1107 "request\n", sdata->dev->name);
1110 skb_reserve(skb, local->hw.extra_tx_headroom);
1112 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1113 memset(mgmt, 0, 24);
1114 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1115 IEEE80211_STYPE_PROBE_REQ);
1116 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1118 memcpy(mgmt->da, dst, ETH_ALEN);
1119 memcpy(mgmt->bssid, dst, ETH_ALEN);
1121 memset(mgmt->da, 0xff, ETH_ALEN);
1122 memset(mgmt->bssid, 0xff, ETH_ALEN);
1124 pos = skb_put(skb, 2 + ssid_len);
1125 *pos++ = WLAN_EID_SSID;
1127 memcpy(pos, ssid, ssid_len);
1129 supp_rates = skb_put(skb, 2);
1130 supp_rates[0] = WLAN_EID_SUPP_RATES;
1132 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1134 for (i = 0; i < sband->n_bitrates; i++) {
1135 struct ieee80211_rate *rate = &sband->bitrates[i];
1137 pos = skb_put(skb, 1);
1139 } else if (supp_rates[1] == 8) {
1140 esupp_rates = skb_put(skb, 3);
1141 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1143 pos = &esupp_rates[2];
1145 pos = skb_put(skb, 1);
1148 *pos = rate->bitrate / 5;
1151 ieee80211_sta_tx(sdata, skb, 0);
1155 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
1157 if (!sdata || !sdata->default_key ||
1158 sdata->default_key->conf.alg != ALG_WEP)
1164 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
1165 struct ieee80211_if_sta *ifsta)
1167 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1168 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1169 ieee80211_associate(sdata, ifsta);
1173 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1174 struct ieee80211_if_sta *ifsta,
1175 struct ieee80211_mgmt *mgmt,
1179 struct ieee802_11_elems elems;
1181 pos = mgmt->u.auth.variable;
1182 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1183 if (!elems.challenge)
1185 ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
1186 elems.challenge_len + 2, 1);
1189 static void ieee80211_send_addba_resp(struct ieee80211_sub_if_data *sdata, u8 *da, u16 tid,
1190 u8 dialog_token, u16 status, u16 policy,
1191 u16 buf_size, u16 timeout)
1193 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1194 struct ieee80211_local *local = sdata->local;
1195 struct sk_buff *skb;
1196 struct ieee80211_mgmt *mgmt;
1199 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1202 printk(KERN_DEBUG "%s: failed to allocate buffer "
1203 "for addba resp frame\n", sdata->dev->name);
1207 skb_reserve(skb, local->hw.extra_tx_headroom);
1208 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1209 memset(mgmt, 0, 24);
1210 memcpy(mgmt->da, da, ETH_ALEN);
1211 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1212 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1213 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
1215 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1216 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1217 IEEE80211_STYPE_ACTION);
1219 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1220 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1221 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1222 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1224 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1225 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1226 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1228 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1229 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1230 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1232 ieee80211_sta_tx(sdata, skb, 0);
1237 void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata, const u8 *da,
1238 u16 tid, u8 dialog_token, u16 start_seq_num,
1239 u16 agg_size, u16 timeout)
1241 struct ieee80211_local *local = sdata->local;
1242 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1243 struct sk_buff *skb;
1244 struct ieee80211_mgmt *mgmt;
1247 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1250 printk(KERN_ERR "%s: failed to allocate buffer "
1251 "for addba request frame\n", sdata->dev->name);
1254 skb_reserve(skb, local->hw.extra_tx_headroom);
1255 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1256 memset(mgmt, 0, 24);
1257 memcpy(mgmt->da, da, ETH_ALEN);
1258 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1259 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1260 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
1262 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1264 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1265 IEEE80211_STYPE_ACTION);
1267 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1269 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1270 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1272 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1273 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
1274 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1275 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
1277 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1279 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1280 mgmt->u.action.u.addba_req.start_seq_num =
1281 cpu_to_le16(start_seq_num << 4);
1283 ieee80211_sta_tx(sdata, skb, 0);
1286 static void ieee80211_sta_process_addba_request(struct ieee80211_local *local,
1287 struct ieee80211_mgmt *mgmt,
1290 struct ieee80211_hw *hw = &local->hw;
1291 struct ieee80211_conf *conf = &hw->conf;
1292 struct sta_info *sta;
1293 struct tid_ampdu_rx *tid_agg_rx;
1294 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1296 int ret = -EOPNOTSUPP;
1297 DECLARE_MAC_BUF(mac);
1301 sta = sta_info_get(local, mgmt->sa);
1307 /* extract session parameters from addba request frame */
1308 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1309 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1311 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1313 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1314 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1315 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1316 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1318 status = WLAN_STATUS_REQUEST_DECLINED;
1320 /* sanity check for incoming parameters:
1321 * check if configuration can support the BA policy
1322 * and if buffer size does not exceeds max value */
1323 if (((ba_policy != 1)
1324 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1325 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1326 status = WLAN_STATUS_INVALID_QOS_PARAM;
1327 #ifdef CONFIG_MAC80211_HT_DEBUG
1328 if (net_ratelimit())
1329 printk(KERN_DEBUG "AddBA Req with bad params from "
1330 "%s on tid %u. policy %d, buffer size %d\n",
1331 print_mac(mac, mgmt->sa), tid, ba_policy,
1333 #endif /* CONFIG_MAC80211_HT_DEBUG */
1336 /* determine default buffer size */
1337 if (buf_size == 0) {
1338 struct ieee80211_supported_band *sband;
1340 sband = local->hw.wiphy->bands[conf->channel->band];
1341 buf_size = IEEE80211_MIN_AMPDU_BUF;
1342 buf_size = buf_size << sband->ht_info.ampdu_factor;
1346 /* examine state machine */
1347 spin_lock_bh(&sta->lock);
1349 if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
1350 #ifdef CONFIG_MAC80211_HT_DEBUG
1351 if (net_ratelimit())
1352 printk(KERN_DEBUG "unexpected AddBA Req from "
1354 print_mac(mac, mgmt->sa), tid);
1355 #endif /* CONFIG_MAC80211_HT_DEBUG */
1359 /* prepare A-MPDU MLME for Rx aggregation */
1360 sta->ampdu_mlme.tid_rx[tid] =
1361 kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1362 if (!sta->ampdu_mlme.tid_rx[tid]) {
1363 #ifdef CONFIG_MAC80211_HT_DEBUG
1364 if (net_ratelimit())
1365 printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1371 sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1372 sta_rx_agg_session_timer_expired;
1373 sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1374 (unsigned long)&sta->timer_to_tid[tid];
1375 init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1377 tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1379 /* prepare reordering buffer */
1380 tid_agg_rx->reorder_buf =
1381 kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC);
1382 if (!tid_agg_rx->reorder_buf) {
1383 #ifdef CONFIG_MAC80211_HT_DEBUG
1384 if (net_ratelimit())
1385 printk(KERN_ERR "can not allocate reordering buffer "
1386 "to tid %d\n", tid);
1388 kfree(sta->ampdu_mlme.tid_rx[tid]);
1391 memset(tid_agg_rx->reorder_buf, 0,
1392 buf_size * sizeof(struct sk_buff *));
1394 if (local->ops->ampdu_action)
1395 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1396 sta->addr, tid, &start_seq_num);
1397 #ifdef CONFIG_MAC80211_HT_DEBUG
1398 printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
1399 #endif /* CONFIG_MAC80211_HT_DEBUG */
1402 kfree(tid_agg_rx->reorder_buf);
1404 sta->ampdu_mlme.tid_rx[tid] = NULL;
1408 /* change state and send addba resp */
1409 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
1410 tid_agg_rx->dialog_token = dialog_token;
1411 tid_agg_rx->ssn = start_seq_num;
1412 tid_agg_rx->head_seq_num = start_seq_num;
1413 tid_agg_rx->buf_size = buf_size;
1414 tid_agg_rx->timeout = timeout;
1415 tid_agg_rx->stored_mpdu_num = 0;
1416 status = WLAN_STATUS_SUCCESS;
1418 spin_unlock_bh(&sta->lock);
1421 ieee80211_send_addba_resp(sta->sdata, sta->addr, tid,
1422 dialog_token, status, 1, buf_size, timeout);
1426 static void ieee80211_sta_process_addba_resp(struct ieee80211_local *local,
1427 struct ieee80211_mgmt *mgmt,
1430 struct ieee80211_hw *hw = &local->hw;
1431 struct sta_info *sta;
1438 sta = sta_info_get(local, mgmt->sa);
1444 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1445 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1447 state = &sta->ampdu_mlme.tid_state_tx[tid];
1449 spin_lock_bh(&sta->lock);
1451 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1452 spin_unlock_bh(&sta->lock);
1453 goto addba_resp_exit;
1456 if (mgmt->u.action.u.addba_resp.dialog_token !=
1457 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
1458 spin_unlock_bh(&sta->lock);
1459 #ifdef CONFIG_MAC80211_HT_DEBUG
1460 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1461 #endif /* CONFIG_MAC80211_HT_DEBUG */
1462 goto addba_resp_exit;
1465 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
1466 #ifdef CONFIG_MAC80211_HT_DEBUG
1467 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1468 #endif /* CONFIG_MAC80211_HT_DEBUG */
1469 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1470 == WLAN_STATUS_SUCCESS) {
1471 *state |= HT_ADDBA_RECEIVED_MSK;
1472 sta->ampdu_mlme.addba_req_num[tid] = 0;
1474 if (*state == HT_AGG_STATE_OPERATIONAL)
1475 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1477 spin_unlock_bh(&sta->lock);
1479 sta->ampdu_mlme.addba_req_num[tid]++;
1480 /* this will allow the state check in stop_BA_session */
1481 *state = HT_AGG_STATE_OPERATIONAL;
1482 spin_unlock_bh(&sta->lock);
1483 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1484 WLAN_BACK_INITIATOR);
1491 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata, const u8 *da, u16 tid,
1492 u16 initiator, u16 reason_code)
1494 struct ieee80211_local *local = sdata->local;
1495 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1496 struct sk_buff *skb;
1497 struct ieee80211_mgmt *mgmt;
1500 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1503 printk(KERN_ERR "%s: failed to allocate buffer "
1504 "for delba frame\n", sdata->dev->name);
1508 skb_reserve(skb, local->hw.extra_tx_headroom);
1509 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1510 memset(mgmt, 0, 24);
1511 memcpy(mgmt->da, da, ETH_ALEN);
1512 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1513 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1514 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
1516 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1517 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1518 IEEE80211_STYPE_ACTION);
1520 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1522 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1523 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1524 params = (u16)(initiator << 11); /* bit 11 initiator */
1525 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1527 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1528 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1530 ieee80211_sta_tx(sdata, skb, 0);
1533 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn)
1535 struct ieee80211_local *local = sdata->local;
1536 struct sk_buff *skb;
1537 struct ieee80211_bar *bar;
1538 u16 bar_control = 0;
1540 skb = dev_alloc_skb(sizeof(*bar) + local->hw.extra_tx_headroom);
1542 printk(KERN_ERR "%s: failed to allocate buffer for "
1543 "bar frame\n", sdata->dev->name);
1546 skb_reserve(skb, local->hw.extra_tx_headroom);
1547 bar = (struct ieee80211_bar *)skb_put(skb, sizeof(*bar));
1548 memset(bar, 0, sizeof(*bar));
1549 bar->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
1550 IEEE80211_STYPE_BACK_REQ);
1551 memcpy(bar->ra, ra, ETH_ALEN);
1552 memcpy(bar->ta, sdata->dev->dev_addr, ETH_ALEN);
1553 bar_control |= (u16)IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL;
1554 bar_control |= (u16)IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA;
1555 bar_control |= (u16)(tid << 12);
1556 bar->control = cpu_to_le16(bar_control);
1557 bar->start_seq_num = cpu_to_le16(ssn);
1559 ieee80211_sta_tx(sdata, skb, 0);
1562 void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid,
1563 u16 initiator, u16 reason)
1565 struct ieee80211_local *local = sdata->local;
1566 struct ieee80211_hw *hw = &local->hw;
1567 struct sta_info *sta;
1569 DECLARE_MAC_BUF(mac);
1573 sta = sta_info_get(local, ra);
1579 /* check if TID is in operational state */
1580 spin_lock_bh(&sta->lock);
1581 if (sta->ampdu_mlme.tid_state_rx[tid]
1582 != HT_AGG_STATE_OPERATIONAL) {
1583 spin_unlock_bh(&sta->lock);
1587 sta->ampdu_mlme.tid_state_rx[tid] =
1588 HT_AGG_STATE_REQ_STOP_BA_MSK |
1589 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1590 spin_unlock_bh(&sta->lock);
1592 /* stop HW Rx aggregation. ampdu_action existence
1593 * already verified in session init so we add the BUG_ON */
1594 BUG_ON(!local->ops->ampdu_action);
1596 #ifdef CONFIG_MAC80211_HT_DEBUG
1597 printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n",
1598 print_mac(mac, ra), tid);
1599 #endif /* CONFIG_MAC80211_HT_DEBUG */
1601 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1604 printk(KERN_DEBUG "HW problem - can not stop rx "
1605 "aggregation for tid %d\n", tid);
1607 /* shutdown timer has not expired */
1608 if (initiator != WLAN_BACK_TIMER)
1609 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1611 /* check if this is a self generated aggregation halt */
1612 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1613 ieee80211_send_delba(sdata, ra, tid, 0, reason);
1615 /* free the reordering buffer */
1616 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1617 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
1618 /* release the reordered frames */
1619 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1620 sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1621 sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
1624 /* free resources */
1625 kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1626 kfree(sta->ampdu_mlme.tid_rx[tid]);
1627 sta->ampdu_mlme.tid_rx[tid] = NULL;
1628 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
1634 static void ieee80211_sta_process_delba(struct ieee80211_sub_if_data *sdata,
1635 struct ieee80211_mgmt *mgmt, size_t len)
1637 struct ieee80211_local *local = sdata->local;
1638 struct sta_info *sta;
1641 DECLARE_MAC_BUF(mac);
1645 sta = sta_info_get(local, mgmt->sa);
1651 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1652 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1653 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1655 #ifdef CONFIG_MAC80211_HT_DEBUG
1656 if (net_ratelimit())
1657 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1658 print_mac(mac, mgmt->sa),
1659 initiator ? "initiator" : "recipient", tid,
1660 mgmt->u.action.u.delba.reason_code);
1661 #endif /* CONFIG_MAC80211_HT_DEBUG */
1663 if (initiator == WLAN_BACK_INITIATOR)
1664 ieee80211_sta_stop_rx_ba_session(sdata, sta->addr, tid,
1665 WLAN_BACK_INITIATOR, 0);
1666 else { /* WLAN_BACK_RECIPIENT */
1667 spin_lock_bh(&sta->lock);
1668 sta->ampdu_mlme.tid_state_tx[tid] =
1669 HT_AGG_STATE_OPERATIONAL;
1670 spin_unlock_bh(&sta->lock);
1671 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1672 WLAN_BACK_RECIPIENT);
1678 * After sending add Block Ack request we activated a timer until
1679 * add Block Ack response will arrive from the recipient.
1680 * If this timer expires sta_addba_resp_timer_expired will be executed.
1682 void sta_addba_resp_timer_expired(unsigned long data)
1684 /* not an elegant detour, but there is no choice as the timer passes
1685 * only one argument, and both sta_info and TID are needed, so init
1686 * flow in sta_info_create gives the TID as data, while the timer_to_id
1687 * array gives the sta through container_of */
1688 u16 tid = *(u8 *)data;
1689 struct sta_info *temp_sta = container_of((void *)data,
1690 struct sta_info, timer_to_tid[tid]);
1692 struct ieee80211_local *local = temp_sta->local;
1693 struct ieee80211_hw *hw = &local->hw;
1694 struct sta_info *sta;
1699 sta = sta_info_get(local, temp_sta->addr);
1705 state = &sta->ampdu_mlme.tid_state_tx[tid];
1706 /* check if the TID waits for addBA response */
1707 spin_lock_bh(&sta->lock);
1708 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1709 spin_unlock_bh(&sta->lock);
1710 *state = HT_AGG_STATE_IDLE;
1711 #ifdef CONFIG_MAC80211_HT_DEBUG
1712 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1713 "expecting addBA response there", tid);
1715 goto timer_expired_exit;
1718 #ifdef CONFIG_MAC80211_HT_DEBUG
1719 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1722 /* go through the state check in stop_BA_session */
1723 *state = HT_AGG_STATE_OPERATIONAL;
1724 spin_unlock_bh(&sta->lock);
1725 ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1726 WLAN_BACK_INITIATOR);
1733 * After accepting the AddBA Request we activated a timer,
1734 * resetting it after each frame that arrives from the originator.
1735 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1737 static void sta_rx_agg_session_timer_expired(unsigned long data)
1739 /* not an elegant detour, but there is no choice as the timer passes
1740 * only one argument, and various sta_info are needed here, so init
1741 * flow in sta_info_create gives the TID as data, while the timer_to_id
1742 * array gives the sta through container_of */
1743 u8 *ptid = (u8 *)data;
1744 u8 *timer_to_id = ptid - *ptid;
1745 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1748 #ifdef CONFIG_MAC80211_HT_DEBUG
1749 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1751 ieee80211_sta_stop_rx_ba_session(sta->sdata, sta->addr,
1752 (u16)*ptid, WLAN_BACK_TIMER,
1753 WLAN_REASON_QSTA_TIMEOUT);
1756 void ieee80211_sta_tear_down_BA_sessions(struct ieee80211_sub_if_data *sdata, u8 *addr)
1758 struct ieee80211_local *local = sdata->local;
1761 for (i = 0; i < STA_TID_NUM; i++) {
1762 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1763 WLAN_BACK_INITIATOR);
1764 ieee80211_sta_stop_rx_ba_session(sdata, addr, i,
1765 WLAN_BACK_RECIPIENT,
1766 WLAN_REASON_QSTA_LEAVE_QBSS);
1770 static void ieee80211_send_refuse_measurement_request(struct ieee80211_sub_if_data *sdata,
1771 struct ieee80211_msrment_ie *request_ie,
1772 const u8 *da, const u8 *bssid,
1775 struct ieee80211_local *local = sdata->local;
1776 struct sk_buff *skb;
1777 struct ieee80211_mgmt *msr_report;
1779 skb = dev_alloc_skb(sizeof(*msr_report) + local->hw.extra_tx_headroom +
1780 sizeof(struct ieee80211_msrment_ie));
1783 printk(KERN_ERR "%s: failed to allocate buffer for "
1784 "measurement report frame\n", sdata->dev->name);
1788 skb_reserve(skb, local->hw.extra_tx_headroom);
1789 msr_report = (struct ieee80211_mgmt *)skb_put(skb, 24);
1790 memset(msr_report, 0, 24);
1791 memcpy(msr_report->da, da, ETH_ALEN);
1792 memcpy(msr_report->sa, sdata->dev->dev_addr, ETH_ALEN);
1793 memcpy(msr_report->bssid, bssid, ETH_ALEN);
1794 msr_report->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1795 IEEE80211_STYPE_ACTION);
1797 skb_put(skb, 1 + sizeof(msr_report->u.action.u.measurement));
1798 msr_report->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
1799 msr_report->u.action.u.measurement.action_code =
1800 WLAN_ACTION_SPCT_MSR_RPRT;
1801 msr_report->u.action.u.measurement.dialog_token = dialog_token;
1803 msr_report->u.action.u.measurement.element_id = WLAN_EID_MEASURE_REPORT;
1804 msr_report->u.action.u.measurement.length =
1805 sizeof(struct ieee80211_msrment_ie);
1807 memset(&msr_report->u.action.u.measurement.msr_elem, 0,
1808 sizeof(struct ieee80211_msrment_ie));
1809 msr_report->u.action.u.measurement.msr_elem.token = request_ie->token;
1810 msr_report->u.action.u.measurement.msr_elem.mode |=
1811 IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED;
1812 msr_report->u.action.u.measurement.msr_elem.type = request_ie->type;
1814 ieee80211_sta_tx(sdata, skb, 0);
1817 static void ieee80211_sta_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1818 struct ieee80211_mgmt *mgmt,
1822 * Ignoring measurement request is spec violation.
1823 * Mandatory measurements must be reported optional
1824 * measurements might be refused or reported incapable
1825 * For now just refuse
1826 * TODO: Answer basic measurement as unmeasured
1828 ieee80211_send_refuse_measurement_request(sdata,
1829 &mgmt->u.action.u.measurement.msr_elem,
1830 mgmt->sa, mgmt->bssid,
1831 mgmt->u.action.u.measurement.dialog_token);
1835 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1836 struct ieee80211_if_sta *ifsta,
1837 struct ieee80211_mgmt *mgmt,
1840 u16 auth_alg, auth_transaction, status_code;
1841 DECLARE_MAC_BUF(mac);
1843 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
1844 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
1850 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1851 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1854 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1855 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1858 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1859 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1860 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1862 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1864 * IEEE 802.11 standard does not require authentication in IBSS
1865 * networks and most implementations do not seem to use it.
1866 * However, try to reply to authentication attempts if someone
1867 * has actually implemented this.
1869 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
1871 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
1874 if (auth_alg != ifsta->auth_alg ||
1875 auth_transaction != ifsta->auth_transaction)
1878 if (status_code != WLAN_STATUS_SUCCESS) {
1879 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1881 const int num_algs = ARRAY_SIZE(algs);
1883 algs[0] = algs[1] = algs[2] = 0xff;
1884 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1885 algs[0] = WLAN_AUTH_OPEN;
1886 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1887 algs[1] = WLAN_AUTH_SHARED_KEY;
1888 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1889 algs[2] = WLAN_AUTH_LEAP;
1890 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1892 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1896 for (i = 0; i < num_algs; i++) {
1898 if (pos >= num_algs)
1900 if (algs[pos] == ifsta->auth_alg ||
1903 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1904 !ieee80211_sta_wep_configured(sdata))
1906 ifsta->auth_alg = algs[pos];
1913 switch (ifsta->auth_alg) {
1914 case WLAN_AUTH_OPEN:
1915 case WLAN_AUTH_LEAP:
1916 ieee80211_auth_completed(sdata, ifsta);
1918 case WLAN_AUTH_SHARED_KEY:
1919 if (ifsta->auth_transaction == 4)
1920 ieee80211_auth_completed(sdata, ifsta);
1922 ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
1928 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1929 struct ieee80211_if_sta *ifsta,
1930 struct ieee80211_mgmt *mgmt,
1934 DECLARE_MAC_BUF(mac);
1939 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1942 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1944 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
1945 printk(KERN_DEBUG "%s: deauthenticated\n", sdata->dev->name);
1947 if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1948 ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
1949 ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1950 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
1951 mod_timer(&ifsta->timer, jiffies +
1952 IEEE80211_RETRY_AUTH_INTERVAL);
1955 ieee80211_set_disassoc(sdata, ifsta, 1);
1956 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1960 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1961 struct ieee80211_if_sta *ifsta,
1962 struct ieee80211_mgmt *mgmt,
1966 DECLARE_MAC_BUF(mac);
1971 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1974 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1976 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1977 printk(KERN_DEBUG "%s: disassociated\n", sdata->dev->name);
1979 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1980 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
1981 mod_timer(&ifsta->timer, jiffies +
1982 IEEE80211_RETRY_AUTH_INTERVAL);
1985 ieee80211_set_disassoc(sdata, ifsta, 0);
1989 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1990 struct ieee80211_if_sta *ifsta,
1991 struct ieee80211_mgmt *mgmt,
1995 struct ieee80211_local *local = sdata->local;
1996 struct ieee80211_supported_band *sband;
1997 struct sta_info *sta;
1998 u64 rates, basic_rates;
1999 u16 capab_info, status_code, aid;
2000 struct ieee802_11_elems elems;
2001 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
2004 DECLARE_MAC_BUF(mac);
2005 bool have_higher_than_11mbit = false;
2007 /* AssocResp and ReassocResp have identical structure, so process both
2008 * of them in this function. */
2010 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
2016 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
2019 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2020 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2021 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2023 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
2024 "status=%d aid=%d)\n",
2025 sdata->dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
2026 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2028 if (status_code != WLAN_STATUS_SUCCESS) {
2029 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
2030 sdata->dev->name, status_code);
2031 /* if this was a reassociation, ensure we try a "full"
2032 * association next time. This works around some broken APs
2033 * which do not correctly reject reassociation requests. */
2034 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2038 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2039 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
2040 "set\n", sdata->dev->name, aid);
2041 aid &= ~(BIT(15) | BIT(14));
2043 pos = mgmt->u.assoc_resp.variable;
2044 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2046 if (!elems.supp_rates) {
2047 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
2052 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
2054 ifsta->ap_capab = capab_info;
2056 kfree(ifsta->assocresp_ies);
2057 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
2058 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
2059 if (ifsta->assocresp_ies)
2060 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
2064 /* Add STA entry for the AP */
2065 sta = sta_info_get(local, ifsta->bssid);
2067 struct ieee80211_sta_bss *bss;
2070 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
2072 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
2073 " the AP\n", sdata->dev->name);
2077 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
2078 local->hw.conf.channel->center_freq,
2079 ifsta->ssid, ifsta->ssid_len);
2081 sta->last_signal = bss->signal;
2082 sta->last_qual = bss->qual;
2083 sta->last_noise = bss->noise;
2084 ieee80211_rx_bss_put(local, bss);
2087 err = sta_info_insert(sta);
2089 printk(KERN_DEBUG "%s: failed to insert STA entry for"
2090 " the AP (error %d)\n", sdata->dev->name, err);
2094 /* update new sta with its last rx activity */
2095 sta->last_rx = jiffies;
2099 * FIXME: Do we really need to update the sta_info's information here?
2100 * We already know about the AP (we found it in our list) so it
2101 * should already be filled with the right info, no?
2102 * As is stands, all this is racy because typically we assume
2103 * the information that is filled in here (except flags) doesn't
2104 * change while a STA structure is alive. As such, it should move
2105 * to between the sta_info_alloc() and sta_info_insert() above.
2108 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
2109 WLAN_STA_AUTHORIZED);
2113 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2115 for (i = 0; i < elems.supp_rates_len; i++) {
2116 int rate = (elems.supp_rates[i] & 0x7f) * 5;
2119 have_higher_than_11mbit = true;
2121 for (j = 0; j < sband->n_bitrates; j++) {
2122 if (sband->bitrates[j].bitrate == rate)
2124 if (elems.supp_rates[i] & 0x80)
2125 basic_rates |= BIT(j);
2129 for (i = 0; i < elems.ext_supp_rates_len; i++) {
2130 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
2133 have_higher_than_11mbit = true;
2135 for (j = 0; j < sband->n_bitrates; j++) {
2136 if (sband->bitrates[j].bitrate == rate)
2138 if (elems.ext_supp_rates[i] & 0x80)
2139 basic_rates |= BIT(j);
2143 sta->supp_rates[local->hw.conf.channel->band] = rates;
2144 sdata->basic_rates = basic_rates;
2146 /* cf. IEEE 802.11 9.2.12 */
2147 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2148 have_higher_than_11mbit)
2149 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2151 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
2153 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
2154 (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2155 struct ieee80211_ht_bss_info bss_info;
2156 ieee80211_ht_cap_ie_to_ht_info(
2157 (struct ieee80211_ht_cap *)
2158 elems.ht_cap_elem, &sta->ht_info);
2159 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2160 (struct ieee80211_ht_addt_info *)
2161 elems.ht_info_elem, &bss_info);
2162 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
2165 rate_control_rate_init(sta, local);
2167 if (elems.wmm_param) {
2168 set_sta_flags(sta, WLAN_STA_WME);
2170 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
2171 elems.wmm_param_len);
2175 /* set AID and assoc capability,
2176 * ieee80211_set_associated() will tell the driver */
2177 bss_conf->aid = aid;
2178 bss_conf->assoc_capability = capab_info;
2179 ieee80211_set_associated(sdata, ifsta, 1);
2181 ieee80211_associated(sdata, ifsta);
2185 /* Caller must hold local->sta_bss_lock */
2186 static void __ieee80211_rx_bss_hash_add(struct ieee80211_local *local,
2187 struct ieee80211_sta_bss *bss)
2191 if (bss_mesh_cfg(bss))
2192 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2193 bss_mesh_id_len(bss));
2195 hash_idx = STA_HASH(bss->bssid);
2197 bss->hnext = local->sta_bss_hash[hash_idx];
2198 local->sta_bss_hash[hash_idx] = bss;
2202 /* Caller must hold local->sta_bss_lock */
2203 static void __ieee80211_rx_bss_hash_del(struct ieee80211_local *local,
2204 struct ieee80211_sta_bss *bss)
2206 struct ieee80211_sta_bss *b, *prev = NULL;
2207 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2211 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2214 prev->hnext = bss->hnext;
2223 static struct ieee80211_sta_bss *
2224 ieee80211_rx_bss_add(struct ieee80211_sub_if_data *sdata, u8 *bssid, int freq,
2225 u8 *ssid, u8 ssid_len)
2227 struct ieee80211_local *local = sdata->local;
2228 struct ieee80211_sta_bss *bss;
2230 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2233 atomic_inc(&bss->users);
2234 atomic_inc(&bss->users);
2235 memcpy(bss->bssid, bssid, ETH_ALEN);
2237 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2238 memcpy(bss->ssid, ssid, ssid_len);
2239 bss->ssid_len = ssid_len;
2242 spin_lock_bh(&local->sta_bss_lock);
2243 /* TODO: order by RSSI? */
2244 list_add_tail(&bss->list, &local->sta_bss_list);
2245 __ieee80211_rx_bss_hash_add(local, bss);
2246 spin_unlock_bh(&local->sta_bss_lock);
2250 static struct ieee80211_sta_bss *
2251 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
2252 u8 *ssid, u8 ssid_len)
2254 struct ieee80211_sta_bss *bss;
2256 spin_lock_bh(&local->sta_bss_lock);
2257 bss = local->sta_bss_hash[STA_HASH(bssid)];
2259 if (!bss_mesh_cfg(bss) &&
2260 !memcmp(bss->bssid, bssid, ETH_ALEN) &&
2261 bss->freq == freq &&
2262 bss->ssid_len == ssid_len &&
2263 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
2264 atomic_inc(&bss->users);
2269 spin_unlock_bh(&local->sta_bss_lock);
2273 #ifdef CONFIG_MAC80211_MESH
2274 static struct ieee80211_sta_bss *
2275 ieee80211_rx_mesh_bss_get(struct ieee80211_local *local, u8 *mesh_id, int mesh_id_len,
2276 u8 *mesh_cfg, int freq)
2278 struct ieee80211_sta_bss *bss;
2280 spin_lock_bh(&local->sta_bss_lock);
2281 bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2283 if (bss_mesh_cfg(bss) &&
2284 !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
2285 bss->freq == freq &&
2286 mesh_id_len == bss->mesh_id_len &&
2287 (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2289 atomic_inc(&bss->users);
2294 spin_unlock_bh(&local->sta_bss_lock);
2298 static struct ieee80211_sta_bss *
2299 ieee80211_rx_mesh_bss_add(struct ieee80211_local *local, u8 *mesh_id, int mesh_id_len,
2300 u8 *mesh_cfg, int mesh_config_len, int freq)
2302 struct ieee80211_sta_bss *bss;
2304 if (mesh_config_len != MESH_CFG_LEN)
2307 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2311 bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
2312 if (!bss->mesh_cfg) {
2317 if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2318 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2319 if (!bss->mesh_id) {
2320 kfree(bss->mesh_cfg);
2324 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2327 atomic_inc(&bss->users);
2328 atomic_inc(&bss->users);
2329 memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
2330 bss->mesh_id_len = mesh_id_len;
2332 spin_lock_bh(&local->sta_bss_lock);
2333 /* TODO: order by RSSI? */
2334 list_add_tail(&bss->list, &local->sta_bss_list);
2335 __ieee80211_rx_bss_hash_add(local, bss);
2336 spin_unlock_bh(&local->sta_bss_lock);
2341 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2347 kfree(bss->ht_add_ie);
2348 kfree(bss_mesh_id(bss));
2349 kfree(bss_mesh_cfg(bss));
2354 static void ieee80211_rx_bss_put(struct ieee80211_local *local,
2355 struct ieee80211_sta_bss *bss)
2358 if (!atomic_dec_and_lock(&bss->users, &local->sta_bss_lock)) {
2363 __ieee80211_rx_bss_hash_del(local, bss);
2364 list_del(&bss->list);
2365 spin_unlock_bh(&local->sta_bss_lock);
2366 ieee80211_rx_bss_free(bss);
2370 void ieee80211_rx_bss_list_init(struct ieee80211_local *local)
2372 spin_lock_init(&local->sta_bss_lock);
2373 INIT_LIST_HEAD(&local->sta_bss_list);
2377 void ieee80211_rx_bss_list_deinit(struct ieee80211_local *local)
2379 struct ieee80211_sta_bss *bss, *tmp;
2381 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2382 ieee80211_rx_bss_put(local, bss);
2386 static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
2387 struct ieee80211_if_sta *ifsta,
2388 struct ieee80211_sta_bss *bss)
2390 struct ieee80211_local *local = sdata->local;
2391 int res, rates, i, j;
2392 struct sk_buff *skb;
2393 struct ieee80211_mgmt *mgmt;
2395 struct ieee80211_supported_band *sband;
2396 union iwreq_data wrqu;
2398 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2400 /* Remove possible STA entries from other IBSS networks. */
2401 sta_info_flush_delayed(sdata);
2403 if (local->ops->reset_tsf) {
2404 /* Reset own TSF to allow time synchronization work. */
2405 local->ops->reset_tsf(local_to_hw(local));
2407 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2408 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
2412 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2414 sdata->drop_unencrypted = bss->capability &
2415 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2417 res = ieee80211_set_freq(sdata, bss->freq);
2422 /* Build IBSS probe response */
2423 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2425 skb_reserve(skb, local->hw.extra_tx_headroom);
2427 mgmt = (struct ieee80211_mgmt *)
2428 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2429 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2430 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2431 IEEE80211_STYPE_PROBE_RESP);
2432 memset(mgmt->da, 0xff, ETH_ALEN);
2433 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
2434 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2435 mgmt->u.beacon.beacon_int =
2436 cpu_to_le16(local->hw.conf.beacon_int);
2437 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
2438 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2440 pos = skb_put(skb, 2 + ifsta->ssid_len);
2441 *pos++ = WLAN_EID_SSID;
2442 *pos++ = ifsta->ssid_len;
2443 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2445 rates = bss->supp_rates_len;
2448 pos = skb_put(skb, 2 + rates);
2449 *pos++ = WLAN_EID_SUPP_RATES;
2451 memcpy(pos, bss->supp_rates, rates);
2453 if (bss->band == IEEE80211_BAND_2GHZ) {
2454 pos = skb_put(skb, 2 + 1);
2455 *pos++ = WLAN_EID_DS_PARAMS;
2457 *pos++ = ieee80211_frequency_to_channel(bss->freq);
2460 pos = skb_put(skb, 2 + 2);
2461 *pos++ = WLAN_EID_IBSS_PARAMS;
2463 /* FIX: set ATIM window based on scan results */
2467 if (bss->supp_rates_len > 8) {
2468 rates = bss->supp_rates_len - 8;
2469 pos = skb_put(skb, 2 + rates);
2470 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2472 memcpy(pos, &bss->supp_rates[8], rates);
2475 ifsta->probe_resp = skb;
2477 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
2481 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2482 for (i = 0; i < bss->supp_rates_len; i++) {
2483 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2484 for (j = 0; j < sband->n_bitrates; j++)
2485 if (sband->bitrates[j].bitrate == bitrate)
2488 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2490 ieee80211_sta_def_wmm_params(sdata, bss, 1);
2492 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
2493 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2495 memset(&wrqu, 0, sizeof(wrqu));
2496 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
2497 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
2502 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2503 struct ieee802_11_elems *elems,
2504 enum ieee80211_band band)
2506 struct ieee80211_supported_band *sband;
2507 struct ieee80211_rate *bitrates;
2511 sband = local->hw.wiphy->bands[band];
2515 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2518 bitrates = sband->bitrates;
2519 num_rates = sband->n_bitrates;
2521 for (i = 0; i < elems->supp_rates_len +
2522 elems->ext_supp_rates_len; i++) {
2525 if (i < elems->supp_rates_len)
2526 rate = elems->supp_rates[i];
2527 else if (elems->ext_supp_rates)
2528 rate = elems->ext_supp_rates
2529 [i - elems->supp_rates_len];
2530 own_rate = 5 * (rate & 0x7f);
2531 for (j = 0; j < num_rates; j++)
2532 if (bitrates[j].bitrate == own_rate)
2533 supp_rates |= BIT(j);
2539 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2540 struct ieee80211_mgmt *mgmt,
2542 struct ieee80211_rx_status *rx_status,
2543 struct ieee802_11_elems *elems,
2546 struct ieee80211_local *local = sdata->local;
2548 struct ieee80211_sta_bss *bss;
2549 struct sta_info *sta;
2550 u64 beacon_timestamp, rx_timestamp;
2551 struct ieee80211_channel *channel;
2552 DECLARE_MAC_BUF(mac);
2553 DECLARE_MAC_BUF(mac2);
2555 beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2557 if (ieee80211_vif_is_mesh(&sdata->vif) && elems->mesh_id &&
2558 elems->mesh_config && mesh_matches_local(elems, sdata)) {
2559 u64 rates = ieee80211_sta_get_rates(local, elems,
2562 mesh_neighbour_update(mgmt->sa, rates, sdata,
2563 mesh_peer_accepts_plinks(elems));
2568 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems->supp_rates &&
2569 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2570 (sta = sta_info_get(local, mgmt->sa))) {
2572 u64 supp_rates = ieee80211_sta_get_rates(local, elems,
2575 prev_rates = sta->supp_rates[rx_status->band];
2576 sta->supp_rates[rx_status->band] &= supp_rates;
2577 if (sta->supp_rates[rx_status->band] == 0) {
2578 /* No matching rates - this should not really happen.
2579 * Make sure that at least one rate is marked
2580 * supported to avoid issues with TX rate ctrl. */
2581 sta->supp_rates[rx_status->band] =
2582 sdata->u.sta.supp_rates_bits[rx_status->band];
2588 if (elems->ds_params && elems->ds_params_len == 1)
2589 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
2591 freq = rx_status->freq;
2593 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2595 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2598 #ifdef CONFIG_MAC80211_MESH
2599 if (elems->mesh_config)
2600 bss = ieee80211_rx_mesh_bss_get(local, elems->mesh_id,
2601 elems->mesh_id_len, elems->mesh_config, freq);
2604 bss = ieee80211_rx_bss_get(local, mgmt->bssid, freq,
2605 elems->ssid, elems->ssid_len);
2607 #ifdef CONFIG_MAC80211_MESH
2608 if (elems->mesh_config)
2609 bss = ieee80211_rx_mesh_bss_add(local, elems->mesh_id,
2610 elems->mesh_id_len, elems->mesh_config,
2611 elems->mesh_config_len, freq);
2614 bss = ieee80211_rx_bss_add(sdata, mgmt->bssid, freq,
2615 elems->ssid, elems->ssid_len);
2620 /* TODO: order by RSSI? */
2621 spin_lock_bh(&local->sta_bss_lock);
2622 list_move_tail(&bss->list, &local->sta_bss_list);
2623 spin_unlock_bh(&local->sta_bss_lock);
2627 /* save the ERP value so that it is available at association time */
2628 if (elems->erp_info && elems->erp_info_len >= 1) {
2629 bss->erp_value = elems->erp_info[0];
2630 bss->has_erp_value = 1;
2633 if (elems->ht_cap_elem &&
2634 (!bss->ht_ie || bss->ht_ie_len != elems->ht_cap_elem_len ||
2635 memcmp(bss->ht_ie, elems->ht_cap_elem, elems->ht_cap_elem_len))) {
2637 bss->ht_ie = kmalloc(elems->ht_cap_elem_len + 2, GFP_ATOMIC);
2639 memcpy(bss->ht_ie, elems->ht_cap_elem - 2,
2640 elems->ht_cap_elem_len + 2);
2641 bss->ht_ie_len = elems->ht_cap_elem_len + 2;
2644 } else if (!elems->ht_cap_elem && bss->ht_ie) {
2650 if (elems->ht_info_elem &&
2652 bss->ht_add_ie_len != elems->ht_info_elem_len ||
2653 memcmp(bss->ht_add_ie, elems->ht_info_elem,
2654 elems->ht_info_elem_len))) {
2655 kfree(bss->ht_add_ie);
2657 kmalloc(elems->ht_info_elem_len + 2, GFP_ATOMIC);
2658 if (bss->ht_add_ie) {
2659 memcpy(bss->ht_add_ie, elems->ht_info_elem - 2,
2660 elems->ht_info_elem_len + 2);
2661 bss->ht_add_ie_len = elems->ht_info_elem_len + 2;
2663 bss->ht_add_ie_len = 0;
2664 } else if (!elems->ht_info_elem && bss->ht_add_ie) {
2665 kfree(bss->ht_add_ie);
2666 bss->ht_add_ie = NULL;
2667 bss->ht_add_ie_len = 0;
2670 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2671 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2674 struct ieee80211_tim_ie *tim_ie =
2675 (struct ieee80211_tim_ie *)elems->tim;
2676 bss->dtim_period = tim_ie->dtim_period;
2679 /* set default value for buggy APs */
2680 if (!elems->tim || bss->dtim_period == 0)
2681 bss->dtim_period = 1;
2683 bss->supp_rates_len = 0;
2684 if (elems->supp_rates) {
2685 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2686 if (clen > elems->supp_rates_len)
2687 clen = elems->supp_rates_len;
2688 memcpy(&bss->supp_rates[bss->supp_rates_len], elems->supp_rates,
2690 bss->supp_rates_len += clen;
2692 if (elems->ext_supp_rates) {
2693 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2694 if (clen > elems->ext_supp_rates_len)
2695 clen = elems->ext_supp_rates_len;
2696 memcpy(&bss->supp_rates[bss->supp_rates_len],
2697 elems->ext_supp_rates, clen);
2698 bss->supp_rates_len += clen;
2701 bss->band = rx_status->band;
2703 bss->timestamp = beacon_timestamp;
2704 bss->last_update = jiffies;
2705 bss->signal = rx_status->signal;
2706 bss->noise = rx_status->noise;
2707 bss->qual = rx_status->qual;
2708 if (!beacon && !bss->probe_resp)
2709 bss->probe_resp = true;
2712 * In STA mode, the remaining parameters should not be overridden
2713 * by beacons because they're not necessarily accurate there.
2715 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2716 bss->probe_resp && beacon) {
2717 ieee80211_rx_bss_put(local, bss);
2722 (!bss->wpa_ie || bss->wpa_ie_len != elems->wpa_len ||
2723 memcmp(bss->wpa_ie, elems->wpa, elems->wpa_len))) {
2725 bss->wpa_ie = kmalloc(elems->wpa_len + 2, GFP_ATOMIC);
2727 memcpy(bss->wpa_ie, elems->wpa - 2, elems->wpa_len + 2);
2728 bss->wpa_ie_len = elems->wpa_len + 2;
2730 bss->wpa_ie_len = 0;
2731 } else if (!elems->wpa && bss->wpa_ie) {
2734 bss->wpa_ie_len = 0;
2738 (!bss->rsn_ie || bss->rsn_ie_len != elems->rsn_len ||
2739 memcmp(bss->rsn_ie, elems->rsn, elems->rsn_len))) {
2741 bss->rsn_ie = kmalloc(elems->rsn_len + 2, GFP_ATOMIC);
2743 memcpy(bss->rsn_ie, elems->rsn - 2, elems->rsn_len + 2);
2744 bss->rsn_ie_len = elems->rsn_len + 2;
2746 bss->rsn_ie_len = 0;
2747 } else if (!elems->rsn && bss->rsn_ie) {
2750 bss->rsn_ie_len = 0;
2755 * http://www.wipo.int/pctdb/en/wo.jsp?wo=2007047181&IA=WO2007047181&DISPLAY=DESC
2759 * In particular, "Wi-Fi CERTIFIED for WMM - Support for Multimedia
2760 * Applications with Quality of Service in Wi-Fi Networks," Wi- Fi
2761 * Alliance (September 1, 2004) is incorporated by reference herein.
2762 * The inclusion of the WMM Parameters in probe responses and
2763 * association responses is mandatory for WMM enabled networks. The
2764 * inclusion of the WMM Parameters in beacons, however, is optional.
2767 if (elems->wmm_param &&
2768 (!bss->wmm_ie || bss->wmm_ie_len != elems->wmm_param_len ||
2769 memcmp(bss->wmm_ie, elems->wmm_param, elems->wmm_param_len))) {
2771 bss->wmm_ie = kmalloc(elems->wmm_param_len + 2, GFP_ATOMIC);
2773 memcpy(bss->wmm_ie, elems->wmm_param - 2,
2774 elems->wmm_param_len + 2);
2775 bss->wmm_ie_len = elems->wmm_param_len + 2;
2777 bss->wmm_ie_len = 0;
2778 } else if (elems->wmm_info &&
2779 (!bss->wmm_ie || bss->wmm_ie_len != elems->wmm_info_len ||
2780 memcmp(bss->wmm_ie, elems->wmm_info,
2781 elems->wmm_info_len))) {
2782 /* As for certain AP's Fifth bit is not set in WMM IE in
2783 * beacon frames.So while parsing the beacon frame the
2784 * wmm_info structure is used instead of wmm_param.
2785 * wmm_info structure was never used to set bss->wmm_ie.
2786 * This code fixes this problem by copying the WME
2787 * information from wmm_info to bss->wmm_ie and enabling
2788 * n-band association.
2791 bss->wmm_ie = kmalloc(elems->wmm_info_len + 2, GFP_ATOMIC);
2793 memcpy(bss->wmm_ie, elems->wmm_info - 2,
2794 elems->wmm_info_len + 2);
2795 bss->wmm_ie_len = elems->wmm_info_len + 2;
2797 bss->wmm_ie_len = 0;
2798 } else if (!elems->wmm_param && !elems->wmm_info && bss->wmm_ie) {
2801 bss->wmm_ie_len = 0;
2804 /* check if we need to merge IBSS */
2805 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2806 !local->sta_sw_scanning && !local->sta_hw_scanning &&
2807 bss->capability & WLAN_CAPABILITY_IBSS &&
2808 bss->freq == local->oper_channel->center_freq &&
2809 elems->ssid_len == sdata->u.sta.ssid_len &&
2810 memcmp(elems->ssid, sdata->u.sta.ssid,
2811 sdata->u.sta.ssid_len) == 0) {
2812 if (rx_status->flag & RX_FLAG_TSFT) {
2813 /* in order for correct IBSS merging we need mactime
2815 * since mactime is defined as the time the first data
2816 * symbol of the frame hits the PHY, and the timestamp
2817 * of the beacon is defined as "the time that the data
2818 * symbol containing the first bit of the timestamp is
2819 * transmitted to the PHY plus the transmitting STA’s
2820 * delays through its local PHY from the MAC-PHY
2821 * interface to its interface with the WM"
2822 * (802.11 11.1.2) - equals the time this bit arrives at
2823 * the receiver - we have to take into account the
2824 * offset between the two.
2825 * e.g: at 1 MBit that means mactime is 192 usec earlier
2826 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2828 int rate = local->hw.wiphy->bands[rx_status->band]->
2829 bitrates[rx_status->rate_idx].bitrate;
2830 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2831 } else if (local && local->ops && local->ops->get_tsf)
2832 /* second best option: get current TSF */
2833 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2835 /* can't merge without knowing the TSF */
2836 rx_timestamp = -1LLU;
2837 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2838 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2839 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2840 print_mac(mac, mgmt->sa),
2841 print_mac(mac2, mgmt->bssid),
2842 (unsigned long long)rx_timestamp,
2843 (unsigned long long)beacon_timestamp,
2844 (unsigned long long)(rx_timestamp - beacon_timestamp),
2846 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2847 if (beacon_timestamp > rx_timestamp) {
2848 #ifndef CONFIG_MAC80211_IBSS_DEBUG
2849 printk(KERN_DEBUG "%s: beacon TSF higher than "
2850 "local TSF - IBSS merge with BSSID %s\n",
2851 sdata->dev->name, print_mac(mac, mgmt->bssid));
2853 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
2854 ieee80211_ibss_add_sta(sdata, NULL,
2855 mgmt->bssid, mgmt->sa,
2856 BIT(rx_status->rate_idx));
2860 ieee80211_rx_bss_put(local, bss);
2864 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2865 struct ieee80211_mgmt *mgmt,
2867 struct ieee80211_rx_status *rx_status)
2870 struct ieee802_11_elems elems;
2872 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
2873 return; /* ignore ProbeResp to foreign address */
2875 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2879 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2882 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, 0);
2886 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2887 struct ieee80211_mgmt *mgmt,
2889 struct ieee80211_rx_status *rx_status)
2891 struct ieee80211_if_sta *ifsta;
2893 struct ieee802_11_elems elems;
2894 struct ieee80211_local *local = sdata->local;
2895 struct ieee80211_conf *conf = &local->hw.conf;
2898 /* Process beacon from the current BSS */
2899 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2903 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2905 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, 1);
2907 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2909 ifsta = &sdata->u.sta;
2911 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2912 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2915 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
2916 elems.wmm_param_len);
2918 /* Do not send changes to driver if we are scanning. This removes
2919 * requirement that driver's bss_info_changed function needs to be
2921 if (local->sta_sw_scanning || local->sta_hw_scanning)
2924 if (elems.erp_info && elems.erp_info_len >= 1)
2925 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2927 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
2928 changed |= ieee80211_handle_protect_preamb(sdata, false,
2929 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
2932 if (elems.ht_cap_elem && elems.ht_info_elem &&
2933 elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2934 struct ieee80211_ht_bss_info bss_info;
2936 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2937 (struct ieee80211_ht_addt_info *)
2938 elems.ht_info_elem, &bss_info);
2939 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2943 ieee80211_bss_info_change_notify(sdata, changed);
2947 static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
2948 struct ieee80211_if_sta *ifsta,
2949 struct ieee80211_mgmt *mgmt,
2951 struct ieee80211_rx_status *rx_status)
2953 struct ieee80211_local *local = sdata->local;
2955 struct sk_buff *skb;
2956 struct ieee80211_mgmt *resp;
2958 DECLARE_MAC_BUF(mac);
2959 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2960 DECLARE_MAC_BUF(mac2);
2961 DECLARE_MAC_BUF(mac3);
2964 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2965 ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
2966 len < 24 + 2 || !ifsta->probe_resp)
2969 if (local->ops->tx_last_beacon)
2970 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2974 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2975 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2976 "%s (tx_last_beacon=%d)\n",
2977 sdata->dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2978 print_mac(mac3, mgmt->bssid), tx_last_beacon);
2979 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2981 if (!tx_last_beacon)
2984 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2985 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2988 end = ((u8 *) mgmt) + len;
2989 pos = mgmt->u.probe_req.variable;
2990 if (pos[0] != WLAN_EID_SSID ||
2991 pos + 2 + pos[1] > end) {
2992 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2993 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2995 sdata->dev->name, print_mac(mac, mgmt->sa));
3000 (pos[1] != ifsta->ssid_len ||
3001 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
3002 /* Ignore ProbeReq for foreign SSID */
3006 /* Reply with ProbeResp */
3007 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
3011 resp = (struct ieee80211_mgmt *) skb->data;
3012 memcpy(resp->da, mgmt->sa, ETH_ALEN);
3013 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3014 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
3015 sdata->dev->name, print_mac(mac, resp->da));
3016 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3017 ieee80211_sta_tx(sdata, skb, 0);
3020 static void ieee80211_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
3021 struct ieee80211_if_sta *ifsta,
3022 struct ieee80211_mgmt *mgmt,
3024 struct ieee80211_rx_status *rx_status)
3026 struct ieee80211_local *local = sdata->local;
3028 if (len < IEEE80211_MIN_ACTION_SIZE)
3031 switch (mgmt->u.action.category) {
3032 case WLAN_CATEGORY_SPECTRUM_MGMT:
3033 if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ)
3035 switch (mgmt->u.action.u.chan_switch.action_code) {
3036 case WLAN_ACTION_SPCT_MSR_REQ:
3037 if (len < (IEEE80211_MIN_ACTION_SIZE +
3038 sizeof(mgmt->u.action.u.measurement)))
3040 ieee80211_sta_process_measurement_req(sdata, mgmt, len);
3044 case WLAN_CATEGORY_BACK:
3045 switch (mgmt->u.action.u.addba_req.action_code) {
3046 case WLAN_ACTION_ADDBA_REQ:
3047 if (len < (IEEE80211_MIN_ACTION_SIZE +
3048 sizeof(mgmt->u.action.u.addba_req)))
3050 ieee80211_sta_process_addba_request(local, mgmt, len);
3052 case WLAN_ACTION_ADDBA_RESP:
3053 if (len < (IEEE80211_MIN_ACTION_SIZE +
3054 sizeof(mgmt->u.action.u.addba_resp)))
3056 ieee80211_sta_process_addba_resp(local, mgmt, len);
3058 case WLAN_ACTION_DELBA:
3059 if (len < (IEEE80211_MIN_ACTION_SIZE +
3060 sizeof(mgmt->u.action.u.delba)))
3062 ieee80211_sta_process_delba(sdata, mgmt, len);
3066 case PLINK_CATEGORY:
3067 if (ieee80211_vif_is_mesh(&sdata->vif))
3068 mesh_rx_plink_frame(sdata, mgmt, len, rx_status);
3070 case MESH_PATH_SEL_CATEGORY:
3071 if (ieee80211_vif_is_mesh(&sdata->vif))
3072 mesh_rx_path_sel_frame(sdata, mgmt, len);
3077 void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
3078 struct ieee80211_rx_status *rx_status)
3080 struct ieee80211_local *local = sdata->local;
3081 struct ieee80211_if_sta *ifsta;
3082 struct ieee80211_mgmt *mgmt;
3088 ifsta = &sdata->u.sta;
3090 mgmt = (struct ieee80211_mgmt *) skb->data;
3091 fc = le16_to_cpu(mgmt->frame_control);
3093 switch (fc & IEEE80211_FCTL_STYPE) {
3094 case IEEE80211_STYPE_PROBE_REQ:
3095 case IEEE80211_STYPE_PROBE_RESP:
3096 case IEEE80211_STYPE_BEACON:
3097 case IEEE80211_STYPE_ACTION:
3098 memcpy(skb->cb, rx_status, sizeof(*rx_status));
3099 case IEEE80211_STYPE_AUTH:
3100 case IEEE80211_STYPE_ASSOC_RESP:
3101 case IEEE80211_STYPE_REASSOC_RESP:
3102 case IEEE80211_STYPE_DEAUTH:
3103 case IEEE80211_STYPE_DISASSOC:
3104 skb_queue_tail(&ifsta->skb_queue, skb);
3105 queue_work(local->hw.workqueue, &ifsta->work);
3114 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3115 struct sk_buff *skb)
3117 struct ieee80211_rx_status *rx_status;
3118 struct ieee80211_if_sta *ifsta;
3119 struct ieee80211_mgmt *mgmt;
3122 ifsta = &sdata->u.sta;
3124 rx_status = (struct ieee80211_rx_status *) skb->cb;
3125 mgmt = (struct ieee80211_mgmt *) skb->data;
3126 fc = le16_to_cpu(mgmt->frame_control);
3128 switch (fc & IEEE80211_FCTL_STYPE) {
3129 case IEEE80211_STYPE_PROBE_REQ:
3130 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len,
3133 case IEEE80211_STYPE_PROBE_RESP:
3134 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
3136 case IEEE80211_STYPE_BEACON:
3137 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3139 case IEEE80211_STYPE_AUTH:
3140 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
3142 case IEEE80211_STYPE_ASSOC_RESP:
3143 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
3145 case IEEE80211_STYPE_REASSOC_RESP:
3146 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
3148 case IEEE80211_STYPE_DEAUTH:
3149 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
3151 case IEEE80211_STYPE_DISASSOC:
3152 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
3154 case IEEE80211_STYPE_ACTION:
3155 ieee80211_rx_mgmt_action(sdata, ifsta, mgmt, skb->len, rx_status);
3164 ieee80211_sta_rx_scan(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
3165 struct ieee80211_rx_status *rx_status)
3167 struct ieee80211_mgmt *mgmt;
3171 return RX_DROP_UNUSABLE;
3173 mgmt = (struct ieee80211_mgmt *) skb->data;
3174 fc = mgmt->frame_control;
3176 if (ieee80211_is_ctl(fc))
3180 return RX_DROP_MONITOR;
3182 if (ieee80211_is_probe_resp(fc)) {
3183 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
3188 if (ieee80211_is_beacon(fc)) {
3189 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3198 static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
3200 struct ieee80211_local *local = sdata->local;
3202 struct sta_info *sta;
3206 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3207 if (sta->sdata == sdata &&
3208 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3221 static void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, unsigned long exp_time)
3223 struct ieee80211_local *local = sdata->local;
3224 struct sta_info *sta, *tmp;
3225 LIST_HEAD(tmp_list);
3226 DECLARE_MAC_BUF(mac);
3227 unsigned long flags;
3229 spin_lock_irqsave(&local->sta_lock, flags);
3230 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
3231 if (time_after(jiffies, sta->last_rx + exp_time)) {
3232 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3233 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
3234 sdata->dev->name, print_mac(mac, sta->addr));
3236 __sta_info_unlink(&sta);
3238 list_add(&sta->list, &tmp_list);
3240 spin_unlock_irqrestore(&local->sta_lock, flags);
3242 list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3243 sta_info_destroy(sta);
3247 static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
3248 struct ieee80211_if_sta *ifsta)
3250 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3252 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
3253 if (ieee80211_sta_active_ibss(sdata))
3256 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3257 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
3258 ieee80211_sta_req_scan(sdata, ifsta->ssid, ifsta->ssid_len);
3262 #ifdef CONFIG_MAC80211_MESH
3263 static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata,
3264 struct ieee80211_if_sta *ifsta)
3268 ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3269 mesh_path_expire(sdata);
3271 free_plinks = mesh_plink_availables(sdata);
3272 if (free_plinks != sdata->u.sta.accepting_plinks)
3273 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
3275 mod_timer(&ifsta->timer, jiffies +
3276 IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3280 void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
3282 struct ieee80211_if_sta *ifsta;
3283 ifsta = &sdata->u.sta;
3284 ifsta->state = IEEE80211_STA_MLME_MESH_UP;
3285 ieee80211_sta_timer((unsigned long)sdata);
3286 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
3291 void ieee80211_sta_timer(unsigned long data)
3293 struct ieee80211_sub_if_data *sdata =
3294 (struct ieee80211_sub_if_data *) data;
3295 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3296 struct ieee80211_local *local = sdata->local;
3298 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3299 queue_work(local->hw.workqueue, &ifsta->work);
3302 void ieee80211_sta_work(struct work_struct *work)
3304 struct ieee80211_sub_if_data *sdata =
3305 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3306 struct ieee80211_local *local = sdata->local;
3307 struct ieee80211_if_sta *ifsta;
3308 struct sk_buff *skb;
3310 if (!netif_running(sdata->dev))
3313 if (local->sta_sw_scanning || local->sta_hw_scanning)
3316 if (WARN_ON(sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3317 sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3318 sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT))
3320 ifsta = &sdata->u.sta;
3322 while ((skb = skb_dequeue(&ifsta->skb_queue)))
3323 ieee80211_sta_rx_queued_mgmt(sdata, skb);
3325 #ifdef CONFIG_MAC80211_MESH
3326 if (ifsta->preq_queue_len &&
3328 ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3329 mesh_path_start_discovery(sdata);
3332 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
3333 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
3334 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3335 if (ifsta->scan_ssid_len)
3336 ieee80211_sta_start_scan(sdata, ifsta->scan_ssid, ifsta->scan_ssid_len);
3338 ieee80211_sta_start_scan(sdata, NULL, 0);
3342 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3343 if (ieee80211_sta_config_auth(sdata, ifsta))
3345 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3346 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3349 switch (ifsta->state) {
3350 case IEEE80211_STA_MLME_DISABLED:
3352 case IEEE80211_STA_MLME_AUTHENTICATE:
3353 ieee80211_authenticate(sdata, ifsta);
3355 case IEEE80211_STA_MLME_ASSOCIATE:
3356 ieee80211_associate(sdata, ifsta);
3358 case IEEE80211_STA_MLME_ASSOCIATED:
3359 ieee80211_associated(sdata, ifsta);
3361 case IEEE80211_STA_MLME_IBSS_SEARCH:
3362 ieee80211_sta_find_ibss(sdata, ifsta);
3364 case IEEE80211_STA_MLME_IBSS_JOINED:
3365 ieee80211_sta_merge_ibss(sdata, ifsta);
3367 #ifdef CONFIG_MAC80211_MESH
3368 case IEEE80211_STA_MLME_MESH_UP:
3369 ieee80211_mesh_housekeeping(sdata, ifsta);
3377 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
3378 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3379 "mixed-cell disabled - disassociate\n", sdata->dev->name);
3381 ieee80211_send_disassoc(sdata, ifsta, WLAN_REASON_UNSPECIFIED);
3382 ieee80211_set_disassoc(sdata, ifsta, 0);
3387 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
3388 struct ieee80211_if_sta *ifsta)
3390 struct ieee80211_local *local = sdata->local;
3392 if (local->ops->reset_tsf) {
3393 /* Reset own TSF to allow time synchronization work. */
3394 local->ops->reset_tsf(local_to_hw(local));
3397 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3400 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3401 ifsta->auth_alg = WLAN_AUTH_OPEN;
3402 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3403 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3404 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3405 ifsta->auth_alg = WLAN_AUTH_LEAP;
3407 ifsta->auth_alg = WLAN_AUTH_OPEN;
3408 ifsta->auth_transaction = -1;
3409 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3410 ifsta->assoc_scan_tries = 0;
3411 ifsta->auth_tries = 0;
3412 ifsta->assoc_tries = 0;
3413 netif_carrier_off(sdata->dev);
3417 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
3418 struct ieee80211_if_sta *ifsta)
3420 struct ieee80211_local *local = sdata->local;
3422 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3425 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3426 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3427 (ifsta->flags & (IEEE80211_STA_SSID_SET |
3428 IEEE80211_STA_AUTO_SSID_SEL))) {
3429 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3430 queue_work(local->hw.workqueue, &ifsta->work);
3434 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3435 const char *ssid, int ssid_len)
3437 int tmp, hidden_ssid;
3439 if (ssid_len == ifsta->ssid_len &&
3440 !memcmp(ifsta->ssid, ssid, ssid_len))
3443 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
3449 if (ssid[tmp] != '\0') {
3455 if (hidden_ssid && ifsta->ssid_len == ssid_len)
3458 if (ssid_len == 1 && ssid[0] == ' ')
3464 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
3465 struct ieee80211_if_sta *ifsta)
3467 struct ieee80211_local *local = sdata->local;
3468 struct ieee80211_sta_bss *bss, *selected = NULL;
3469 int top_rssi = 0, freq;
3471 spin_lock_bh(&local->sta_bss_lock);
3472 freq = local->oper_channel->center_freq;
3473 list_for_each_entry(bss, &local->sta_bss_list, list) {
3474 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3477 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3478 IEEE80211_STA_AUTO_BSSID_SEL |
3479 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
3480 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3481 !!sdata->default_key))
3484 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3488 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3489 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3492 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3493 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3496 if (!selected || top_rssi < bss->signal) {
3498 top_rssi = bss->signal;
3502 atomic_inc(&selected->users);
3503 spin_unlock_bh(&local->sta_bss_lock);
3506 ieee80211_set_freq(sdata, selected->freq);
3507 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3508 ieee80211_sta_set_ssid(sdata, selected->ssid,
3509 selected->ssid_len);
3510 ieee80211_sta_set_bssid(sdata, selected->bssid);
3511 ieee80211_sta_def_wmm_params(sdata, selected, 0);
3512 ieee80211_rx_bss_put(local, selected);
3513 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
3514 ieee80211_sta_reset_auth(sdata, ifsta);
3517 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
3518 ifsta->assoc_scan_tries++;
3519 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3520 ieee80211_sta_start_scan(sdata, NULL, 0);
3522 ieee80211_sta_start_scan(sdata, ifsta->ssid,
3524 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
3525 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3527 ifsta->state = IEEE80211_STA_MLME_DISABLED;
3533 static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
3534 struct ieee80211_if_sta *ifsta)
3536 struct ieee80211_local *local = sdata->local;
3537 struct ieee80211_sta_bss *bss;
3538 struct ieee80211_supported_band *sband;
3539 u8 bssid[ETH_ALEN], *pos;
3542 DECLARE_MAC_BUF(mac);
3545 /* Easier testing, use fixed BSSID. */
3546 memset(bssid, 0xfe, ETH_ALEN);
3548 /* Generate random, not broadcast, locally administered BSSID. Mix in
3549 * own MAC address to make sure that devices that do not have proper
3550 * random number generator get different BSSID. */
3551 get_random_bytes(bssid, ETH_ALEN);
3552 for (i = 0; i < ETH_ALEN; i++)
3553 bssid[i] ^= sdata->dev->dev_addr[i];
3558 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3559 sdata->dev->name, print_mac(mac, bssid));
3561 bss = ieee80211_rx_bss_add(sdata, bssid,
3562 local->hw.conf.channel->center_freq,
3563 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3567 bss->band = local->hw.conf.channel->band;
3568 sband = local->hw.wiphy->bands[bss->band];
3570 if (local->hw.conf.beacon_int == 0)
3571 local->hw.conf.beacon_int = 100;
3572 bss->beacon_int = local->hw.conf.beacon_int;
3573 bss->last_update = jiffies;
3574 bss->capability = WLAN_CAPABILITY_IBSS;
3576 if (sdata->default_key)
3577 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3579 sdata->drop_unencrypted = 0;
3581 bss->supp_rates_len = sband->n_bitrates;
3582 pos = bss->supp_rates;
3583 for (i = 0; i < sband->n_bitrates; i++) {
3584 int rate = sband->bitrates[i].bitrate;
3585 *pos++ = (u8) (rate / 5);
3588 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3589 ieee80211_rx_bss_put(local, bss);
3594 static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
3595 struct ieee80211_if_sta *ifsta)
3597 struct ieee80211_local *local = sdata->local;
3598 struct ieee80211_sta_bss *bss;
3602 DECLARE_MAC_BUF(mac);
3603 DECLARE_MAC_BUF(mac2);
3605 if (ifsta->ssid_len == 0)
3608 active_ibss = ieee80211_sta_active_ibss(sdata);
3609 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3610 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3611 sdata->dev->name, active_ibss);
3612 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3613 spin_lock_bh(&local->sta_bss_lock);
3614 list_for_each_entry(bss, &local->sta_bss_list, list) {
3615 if (ifsta->ssid_len != bss->ssid_len ||
3616 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3617 || !(bss->capability & WLAN_CAPABILITY_IBSS))
3619 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3620 printk(KERN_DEBUG " bssid=%s found\n",
3621 print_mac(mac, bss->bssid));
3622 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3623 memcpy(bssid, bss->bssid, ETH_ALEN);
3625 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3628 spin_unlock_bh(&local->sta_bss_lock);
3630 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3632 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
3633 "%s\n", print_mac(mac, bssid),
3634 print_mac(mac2, ifsta->bssid));
3635 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3637 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3641 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
3642 search_freq = bss->freq;
3644 search_freq = local->hw.conf.channel->center_freq;
3646 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
3647 ifsta->ssid, ifsta->ssid_len);
3651 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3652 " based on configured SSID\n",
3653 sdata->dev->name, print_mac(mac, bssid));
3654 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3655 ieee80211_rx_bss_put(local, bss);
3660 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3661 printk(KERN_DEBUG " did not try to join ibss\n");
3662 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3664 /* Selected IBSS not found in current scan results - try to scan */
3665 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
3666 !ieee80211_sta_active_ibss(sdata)) {
3667 mod_timer(&ifsta->timer, jiffies +
3668 IEEE80211_IBSS_MERGE_INTERVAL);
3669 } else if (time_after(jiffies, local->last_scan_completed +
3670 IEEE80211_SCAN_INTERVAL)) {
3671 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3672 "join\n", sdata->dev->name);
3673 return ieee80211_sta_req_scan(sdata, ifsta->ssid,
3675 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
3676 int interval = IEEE80211_SCAN_INTERVAL;
3678 if (time_after(jiffies, ifsta->ibss_join_req +
3679 IEEE80211_IBSS_JOIN_TIMEOUT)) {
3680 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3681 (!(local->oper_channel->flags &
3682 IEEE80211_CHAN_NO_IBSS)))
3683 return ieee80211_sta_create_ibss(sdata, ifsta);
3684 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3685 printk(KERN_DEBUG "%s: IBSS not allowed on"
3686 " %d MHz\n", sdata->dev->name,
3687 local->hw.conf.channel->center_freq);
3690 /* No IBSS found - decrease scan interval and continue
3692 interval = IEEE80211_SCAN_INTERVAL_SLOW;
3695 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
3696 mod_timer(&ifsta->timer, jiffies + interval);
3704 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
3706 struct ieee80211_if_sta *ifsta;
3709 if (len > IEEE80211_MAX_SSID_LEN)
3712 ifsta = &sdata->u.sta;
3714 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
3715 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
3716 memcpy(ifsta->ssid, ssid, len);
3717 ifsta->ssid_len = len;
3718 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3722 * Hack! MLME code needs to be cleaned up to have different
3723 * entry points for configuration and internal selection change
3725 if (netif_running(sdata->dev))
3726 res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID);
3728 printk(KERN_DEBUG "%s: Failed to config new SSID to "
3729 "the low-level driver\n", sdata->dev->name);
3735 ifsta->flags |= IEEE80211_STA_SSID_SET;
3737 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3739 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3740 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3741 ifsta->ibss_join_req = jiffies;
3742 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
3743 return ieee80211_sta_find_ibss(sdata, ifsta);
3750 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
3752 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3753 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3754 *len = ifsta->ssid_len;
3759 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
3761 struct ieee80211_if_sta *ifsta;
3764 ifsta = &sdata->u.sta;
3766 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3767 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3770 * Hack! See also ieee80211_sta_set_ssid.
3772 if (netif_running(sdata->dev))
3773 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
3775 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3776 "the low-level driver\n", sdata->dev->name);
3781 if (is_valid_ether_addr(bssid))
3782 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3784 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3790 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3791 struct ieee80211_sub_if_data *sdata,
3794 struct sk_buff *skb;
3795 struct ieee80211_hdr *nullfunc;
3798 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3800 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3801 "frame\n", sdata->dev->name);
3804 skb_reserve(skb, local->hw.extra_tx_headroom);
3806 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3807 memset(nullfunc, 0, 24);
3808 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3809 IEEE80211_FCTL_TODS);
3811 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
3812 nullfunc->frame_control = fc;
3813 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3814 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3815 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3817 ieee80211_sta_tx(sdata, skb, 0);
3821 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3823 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3824 ieee80211_vif_is_mesh(&sdata->vif))
3825 ieee80211_sta_timer((unsigned long)sdata);
3828 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3830 struct ieee80211_local *local = hw_to_local(hw);
3831 struct net_device *dev = local->scan_dev;
3832 struct ieee80211_sub_if_data *sdata;
3833 union iwreq_data wrqu;
3835 local->last_scan_completed = jiffies;
3836 memset(&wrqu, 0, sizeof(wrqu));
3837 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3839 if (local->sta_hw_scanning) {
3840 local->sta_hw_scanning = 0;
3841 if (ieee80211_hw_config(local))
3842 printk(KERN_DEBUG "%s: failed to restore operational "
3843 "channel after scan\n", dev->name);
3844 /* Restart STA timer for HW scan case */
3846 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3847 ieee80211_restart_sta_timer(sdata);
3853 local->sta_sw_scanning = 0;
3854 if (ieee80211_hw_config(local))
3855 printk(KERN_DEBUG "%s: failed to restore operational "
3856 "channel after scan\n", dev->name);
3859 netif_tx_lock_bh(local->mdev);
3860 netif_addr_lock(local->mdev);
3861 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3862 local->ops->configure_filter(local_to_hw(local),
3863 FIF_BCN_PRBRESP_PROMISC,
3864 &local->filter_flags,
3865 local->mdev->mc_count,
3866 local->mdev->mc_list);
3868 netif_addr_unlock(local->mdev);
3869 netif_tx_unlock_bh(local->mdev);
3872 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3873 /* Tell AP we're back */
3874 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3875 sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3876 ieee80211_send_nullfunc(local, sdata, 0);
3878 ieee80211_restart_sta_timer(sdata);
3880 netif_wake_queue(sdata->dev);
3885 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3886 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3887 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3888 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3889 (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) &&
3890 !ieee80211_sta_active_ibss(sdata)))
3891 ieee80211_sta_find_ibss(sdata, ifsta);
3894 EXPORT_SYMBOL(ieee80211_scan_completed);
3896 void ieee80211_sta_scan_work(struct work_struct *work)
3898 struct ieee80211_local *local =
3899 container_of(work, struct ieee80211_local, scan_work.work);
3900 struct net_device *dev = local->scan_dev;
3901 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3902 struct ieee80211_supported_band *sband;
3903 struct ieee80211_channel *chan;
3905 unsigned long next_delay = 0;
3907 if (!local->sta_sw_scanning)
3910 switch (local->scan_state) {
3911 case SCAN_SET_CHANNEL:
3913 * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3914 * after we successfully scanned the last channel of the last
3915 * band (and the last band is supported by the hw)
3917 if (local->scan_band < IEEE80211_NUM_BANDS)
3918 sband = local->hw.wiphy->bands[local->scan_band];
3923 * If we are at an unsupported band and have more bands
3924 * left to scan, advance to the next supported one.
3926 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
3928 sband = local->hw.wiphy->bands[local->scan_band];
3929 local->scan_channel_idx = 0;
3932 /* if no more bands/channels left, complete scan */
3933 if (!sband || local->scan_channel_idx >= sband->n_channels) {
3934 ieee80211_scan_completed(local_to_hw(local));
3938 chan = &sband->channels[local->scan_channel_idx];
3940 if (chan->flags & IEEE80211_CHAN_DISABLED ||
3941 (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3942 chan->flags & IEEE80211_CHAN_NO_IBSS))
3946 local->scan_channel = chan;
3947 if (ieee80211_hw_config(local)) {
3948 printk(KERN_DEBUG "%s: failed to set freq to "
3949 "%d MHz for scan\n", dev->name,
3955 /* advance state machine to next channel/band */
3956 local->scan_channel_idx++;
3957 if (local->scan_channel_idx >= sband->n_channels) {
3959 * scan_band may end up == IEEE80211_NUM_BANDS, but
3960 * we'll catch that case above and complete the scan
3961 * if that is the case.
3964 local->scan_channel_idx = 0;
3970 next_delay = IEEE80211_PROBE_DELAY +
3971 usecs_to_jiffies(local->hw.channel_change_time);
3972 local->scan_state = SCAN_SEND_PROBE;
3974 case SCAN_SEND_PROBE:
3975 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3976 local->scan_state = SCAN_SET_CHANNEL;
3978 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3980 ieee80211_send_probe_req(sdata, NULL, local->scan_ssid,
3981 local->scan_ssid_len);
3982 next_delay = IEEE80211_CHANNEL_TIME;
3986 if (local->sta_sw_scanning)
3987 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3992 static int ieee80211_sta_start_scan(struct ieee80211_sub_if_data *scan_sdata,
3993 u8 *ssid, size_t ssid_len)
3995 struct ieee80211_local *local = scan_sdata->local;
3996 struct ieee80211_sub_if_data *sdata;
3998 if (ssid_len > IEEE80211_MAX_SSID_LEN)
4001 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
4002 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
4005 * ScanType: ACTIVE, PASSIVE
4006 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
4007 * a Probe frame during active scanning
4009 * MinChannelTime (>= ProbeDelay), in TU
4010 * MaxChannelTime: (>= MinChannelTime), in TU
4013 /* MLME-SCAN.confirm
4015 * ResultCode: SUCCESS, INVALID_PARAMETERS
4018 if (local->sta_sw_scanning || local->sta_hw_scanning) {
4019 if (local->scan_dev == scan_sdata->dev)
4024 if (local->ops->hw_scan) {
4025 int rc = local->ops->hw_scan(local_to_hw(local),
4028 local->sta_hw_scanning = 1;
4029 local->scan_dev = scan_sdata->dev;
4034 local->sta_sw_scanning = 1;
4037 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4038 netif_stop_queue(sdata->dev);
4039 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
4040 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
4041 ieee80211_send_nullfunc(local, sdata, 1);
4046 local->scan_ssid_len = ssid_len;
4047 memcpy(local->scan_ssid, ssid, ssid_len);
4049 local->scan_ssid_len = 0;
4050 local->scan_state = SCAN_SET_CHANNEL;
4051 local->scan_channel_idx = 0;
4052 local->scan_band = IEEE80211_BAND_2GHZ;
4053 local->scan_dev = scan_sdata->dev;
4055 netif_addr_lock_bh(local->mdev);
4056 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
4057 local->ops->configure_filter(local_to_hw(local),
4058 FIF_BCN_PRBRESP_PROMISC,
4059 &local->filter_flags,
4060 local->mdev->mc_count,
4061 local->mdev->mc_list);
4062 netif_addr_unlock_bh(local->mdev);
4064 /* TODO: start scan as soon as all nullfunc frames are ACKed */
4065 queue_delayed_work(local->hw.workqueue, &local->scan_work,
4066 IEEE80211_CHANNEL_TIME);
4072 int ieee80211_sta_req_scan(struct ieee80211_sub_if_data *sdata, u8 *ssid, size_t ssid_len)
4074 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4075 struct ieee80211_local *local = sdata->local;
4077 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4078 return ieee80211_sta_start_scan(sdata, ssid, ssid_len);
4080 if (local->sta_sw_scanning || local->sta_hw_scanning) {
4081 if (local->scan_dev == sdata->dev)
4086 ifsta->scan_ssid_len = ssid_len;
4088 memcpy(ifsta->scan_ssid, ssid, ssid_len);
4089 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
4090 queue_work(local->hw.workqueue, &ifsta->work);
4095 ieee80211_sta_scan_result(struct ieee80211_local *local,
4096 struct iw_request_info *info,
4097 struct ieee80211_sta_bss *bss,
4098 char *current_ev, char *end_buf)
4100 struct iw_event iwe;
4102 if (time_after(jiffies,
4103 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
4106 memset(&iwe, 0, sizeof(iwe));
4107 iwe.cmd = SIOCGIWAP;
4108 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
4109 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
4110 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4113 memset(&iwe, 0, sizeof(iwe));
4114 iwe.cmd = SIOCGIWESSID;
4115 if (bss_mesh_cfg(bss)) {
4116 iwe.u.data.length = bss_mesh_id_len(bss);
4117 iwe.u.data.flags = 1;
4118 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4119 &iwe, bss_mesh_id(bss));
4121 iwe.u.data.length = bss->ssid_len;
4122 iwe.u.data.flags = 1;
4123 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4127 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
4128 || bss_mesh_cfg(bss)) {
4129 memset(&iwe, 0, sizeof(iwe));
4130 iwe.cmd = SIOCGIWMODE;
4131 if (bss_mesh_cfg(bss))
4132 iwe.u.mode = IW_MODE_MESH;
4133 else if (bss->capability & WLAN_CAPABILITY_ESS)
4134 iwe.u.mode = IW_MODE_MASTER;
4136 iwe.u.mode = IW_MODE_ADHOC;
4137 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
4138 &iwe, IW_EV_UINT_LEN);
4141 memset(&iwe, 0, sizeof(iwe));
4142 iwe.cmd = SIOCGIWFREQ;
4143 iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
4145 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4148 memset(&iwe, 0, sizeof(iwe));
4149 iwe.cmd = SIOCGIWFREQ;
4150 iwe.u.freq.m = bss->freq;
4152 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4154 memset(&iwe, 0, sizeof(iwe));
4156 iwe.u.qual.qual = bss->qual;
4157 iwe.u.qual.level = bss->signal;
4158 iwe.u.qual.noise = bss->noise;
4159 iwe.u.qual.updated = local->wstats_flags;
4160 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4163 memset(&iwe, 0, sizeof(iwe));
4164 iwe.cmd = SIOCGIWENCODE;
4165 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
4166 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4168 iwe.u.data.flags = IW_ENCODE_DISABLED;
4169 iwe.u.data.length = 0;
4170 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4173 if (bss && bss->wpa_ie) {
4174 memset(&iwe, 0, sizeof(iwe));
4175 iwe.cmd = IWEVGENIE;
4176 iwe.u.data.length = bss->wpa_ie_len;
4177 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4181 if (bss && bss->rsn_ie) {
4182 memset(&iwe, 0, sizeof(iwe));
4183 iwe.cmd = IWEVGENIE;
4184 iwe.u.data.length = bss->rsn_ie_len;
4185 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4189 if (bss && bss->ht_ie) {
4190 memset(&iwe, 0, sizeof(iwe));
4191 iwe.cmd = IWEVGENIE;
4192 iwe.u.data.length = bss->ht_ie_len;
4193 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4197 if (bss && bss->supp_rates_len > 0) {
4198 /* display all supported rates in readable format */
4199 char *p = current_ev + iwe_stream_lcp_len(info);
4202 memset(&iwe, 0, sizeof(iwe));
4203 iwe.cmd = SIOCGIWRATE;
4204 /* Those two flags are ignored... */
4205 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4207 for (i = 0; i < bss->supp_rates_len; i++) {
4208 iwe.u.bitrate.value = ((bss->supp_rates[i] &
4210 p = iwe_stream_add_value(info, current_ev, p,
4211 end_buf, &iwe, IW_EV_PARAM_LEN);
4218 buf = kmalloc(30, GFP_ATOMIC);
4220 memset(&iwe, 0, sizeof(iwe));
4221 iwe.cmd = IWEVCUSTOM;
4222 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4223 iwe.u.data.length = strlen(buf);
4224 current_ev = iwe_stream_add_point(info, current_ev,
4227 memset(&iwe, 0, sizeof(iwe));
4228 iwe.cmd = IWEVCUSTOM;
4229 sprintf(buf, " Last beacon: %dms ago",
4230 jiffies_to_msecs(jiffies - bss->last_update));
4231 iwe.u.data.length = strlen(buf);
4232 current_ev = iwe_stream_add_point(info, current_ev,
4233 end_buf, &iwe, buf);
4238 if (bss_mesh_cfg(bss)) {
4240 u8 *cfg = bss_mesh_cfg(bss);
4241 buf = kmalloc(50, GFP_ATOMIC);
4243 memset(&iwe, 0, sizeof(iwe));
4244 iwe.cmd = IWEVCUSTOM;
4245 sprintf(buf, "Mesh network (version %d)", cfg[0]);
4246 iwe.u.data.length = strlen(buf);
4247 current_ev = iwe_stream_add_point(info, current_ev,
4250 sprintf(buf, "Path Selection Protocol ID: "
4251 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4253 iwe.u.data.length = strlen(buf);
4254 current_ev = iwe_stream_add_point(info, current_ev,
4257 sprintf(buf, "Path Selection Metric ID: "
4258 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4260 iwe.u.data.length = strlen(buf);
4261 current_ev = iwe_stream_add_point(info, current_ev,
4264 sprintf(buf, "Congestion Control Mode ID: "
4265 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4267 iwe.u.data.length = strlen(buf);
4268 current_ev = iwe_stream_add_point(info, current_ev,
4271 sprintf(buf, "Channel Precedence: "
4272 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4274 iwe.u.data.length = strlen(buf);
4275 current_ev = iwe_stream_add_point(info, current_ev,
4286 int ieee80211_sta_scan_results(struct ieee80211_local *local,
4287 struct iw_request_info *info,
4288 char *buf, size_t len)
4290 char *current_ev = buf;
4291 char *end_buf = buf + len;
4292 struct ieee80211_sta_bss *bss;
4294 spin_lock_bh(&local->sta_bss_lock);
4295 list_for_each_entry(bss, &local->sta_bss_list, list) {
4296 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4297 spin_unlock_bh(&local->sta_bss_lock);
4300 current_ev = ieee80211_sta_scan_result(local, info, bss,
4301 current_ev, end_buf);
4303 spin_unlock_bh(&local->sta_bss_lock);
4304 return current_ev - buf;
4308 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
4310 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4312 kfree(ifsta->extra_ie);
4314 ifsta->extra_ie = NULL;
4315 ifsta->extra_ie_len = 0;
4318 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4319 if (!ifsta->extra_ie) {
4320 ifsta->extra_ie_len = 0;
4323 memcpy(ifsta->extra_ie, ie, len);
4324 ifsta->extra_ie_len = len;
4329 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
4330 struct sk_buff *skb, u8 *bssid,
4331 u8 *addr, u64 supp_rates)
4333 struct ieee80211_local *local = sdata->local;
4334 struct sta_info *sta;
4335 DECLARE_MAC_BUF(mac);
4336 int band = local->hw.conf.channel->band;
4338 /* TODO: Could consider removing the least recently used entry and
4339 * allow new one to be added. */
4340 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4341 if (net_ratelimit()) {
4342 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
4343 "entry %s\n", sdata->dev->name, print_mac(mac, addr));
4348 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
4351 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
4352 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
4353 wiphy_name(local->hw.wiphy), print_mac(mac, addr), sdata->dev->name);
4356 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4360 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
4363 sta->supp_rates[band] = supp_rates;
4365 sta->supp_rates[band] = sdata->u.sta.supp_rates_bits[band];
4367 rate_control_rate_init(sta, local);
4369 if (sta_info_insert(sta))
4376 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
4378 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4380 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
4381 sdata->dev->name, reason);
4383 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4384 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
4387 ieee80211_send_deauth(sdata, ifsta, reason);
4388 ieee80211_set_disassoc(sdata, ifsta, 1);
4393 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
4395 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4397 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
4398 sdata->dev->name, reason);
4400 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4403 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
4406 ieee80211_send_disassoc(sdata, ifsta, reason);
4407 ieee80211_set_disassoc(sdata, ifsta, 0);
4411 void ieee80211_notify_mac(struct ieee80211_hw *hw,
4412 enum ieee80211_notification_types notif_type)
4414 struct ieee80211_local *local = hw_to_local(hw);
4415 struct ieee80211_sub_if_data *sdata;
4417 switch (notif_type) {
4418 case IEEE80211_NOTIFY_RE_ASSOC:
4420 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4421 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4424 ieee80211_sta_req_auth(sdata, &sdata->u.sta);
4430 EXPORT_SYMBOL(ieee80211_notify_mac);