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));
101 elems->ie_start = start;
102 elems->total_len = len;
117 elems->ssid_len = elen;
119 case WLAN_EID_SUPP_RATES:
120 elems->supp_rates = pos;
121 elems->supp_rates_len = elen;
123 case WLAN_EID_FH_PARAMS:
124 elems->fh_params = pos;
125 elems->fh_params_len = elen;
127 case WLAN_EID_DS_PARAMS:
128 elems->ds_params = pos;
129 elems->ds_params_len = elen;
131 case WLAN_EID_CF_PARAMS:
132 elems->cf_params = pos;
133 elems->cf_params_len = elen;
137 elems->tim_len = elen;
139 case WLAN_EID_IBSS_PARAMS:
140 elems->ibss_params = pos;
141 elems->ibss_params_len = elen;
143 case WLAN_EID_CHALLENGE:
144 elems->challenge = pos;
145 elems->challenge_len = elen;
148 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
150 /* Microsoft OUI (00:50:F2) */
152 /* OUI Type 1 - WPA IE */
154 elems->wpa_len = elen;
155 } else if (elen >= 5 && pos[3] == 2) {
157 elems->wmm_info = pos;
158 elems->wmm_info_len = elen;
159 } else if (pos[4] == 1) {
160 elems->wmm_param = pos;
161 elems->wmm_param_len = elen;
168 elems->rsn_len = elen;
170 case WLAN_EID_ERP_INFO:
171 elems->erp_info = pos;
172 elems->erp_info_len = elen;
174 case WLAN_EID_EXT_SUPP_RATES:
175 elems->ext_supp_rates = pos;
176 elems->ext_supp_rates_len = elen;
178 case WLAN_EID_HT_CAPABILITY:
179 elems->ht_cap_elem = pos;
180 elems->ht_cap_elem_len = elen;
182 case WLAN_EID_HT_EXTRA_INFO:
183 elems->ht_info_elem = pos;
184 elems->ht_info_elem_len = elen;
186 case WLAN_EID_MESH_ID:
187 elems->mesh_id = pos;
188 elems->mesh_id_len = elen;
190 case WLAN_EID_MESH_CONFIG:
191 elems->mesh_config = pos;
192 elems->mesh_config_len = elen;
194 case WLAN_EID_PEER_LINK:
195 elems->peer_link = pos;
196 elems->peer_link_len = elen;
200 elems->preq_len = elen;
204 elems->prep_len = elen;
208 elems->perr_len = elen;
210 case WLAN_EID_CHANNEL_SWITCH:
211 elems->ch_switch_elem = pos;
212 elems->ch_switch_elem_len = elen;
215 if (!elems->quiet_elem) {
216 elems->quiet_elem = pos;
217 elems->quiet_elem_len = elen;
219 elems->num_of_quiet_elem++;
221 case WLAN_EID_COUNTRY:
222 elems->country_elem = pos;
223 elems->country_elem_len = elen;
225 case WLAN_EID_PWR_CONSTRAINT:
226 elems->pwr_constr_elem = pos;
227 elems->pwr_constr_elem_len = elen;
239 static u8 * ieee80211_bss_get_ie(struct ieee80211_sta_bss *bss, u8 ie)
246 end = pos + bss->ies_len;
248 while (pos + 1 < end) {
249 if (pos + 2 + pos[1] > end)
260 static int ecw2cw(int ecw)
262 return (1 << ecw) - 1;
266 static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
267 struct ieee80211_sta_bss *bss,
270 struct ieee80211_local *local = sdata->local;
271 int i, have_higher_than_11mbit = 0;
274 /* cf. IEEE 802.11 9.2.12 */
275 for (i = 0; i < bss->supp_rates_len; i++)
276 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
277 have_higher_than_11mbit = 1;
279 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
280 have_higher_than_11mbit)
281 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
283 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
286 if (local->ops->conf_tx) {
287 struct ieee80211_tx_queue_params qparam;
289 memset(&qparam, 0, sizeof(qparam));
293 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
294 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
299 qparam.cw_max = 1023;
302 for (i = 0; i < local_to_hw(local)->queues; i++)
303 local->ops->conf_tx(local_to_hw(local), i, &qparam);
307 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
308 struct ieee80211_if_sta *ifsta,
309 u8 *wmm_param, size_t wmm_param_len)
311 struct ieee80211_tx_queue_params params;
316 if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
322 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
324 count = wmm_param[6] & 0x0f;
325 if (count == ifsta->wmm_last_param_set)
327 ifsta->wmm_last_param_set = count;
330 left = wmm_param_len - 8;
332 memset(¶ms, 0, sizeof(params));
334 if (!local->ops->conf_tx)
338 for (; left >= 4; left -= 4, pos += 4) {
339 int aci = (pos[0] >> 5) & 0x03;
340 int acm = (pos[0] >> 4) & 0x01;
347 local->wmm_acm |= BIT(0) | BIT(3);
352 local->wmm_acm |= BIT(4) | BIT(5);
357 local->wmm_acm |= BIT(6) | BIT(7);
363 local->wmm_acm |= BIT(1) | BIT(2);
367 params.aifs = pos[0] & 0x0f;
368 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
369 params.cw_min = ecw2cw(pos[1] & 0x0f);
370 params.txop = get_unaligned_le16(pos + 2);
371 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
372 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
373 "cWmin=%d cWmax=%d txop=%d\n",
374 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
375 params.cw_max, params.txop);
377 /* TODO: handle ACM (block TX, fallback to next lowest allowed
379 if (local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) {
380 printk(KERN_DEBUG "%s: failed to set TX queue "
381 "parameters for queue %d\n", local->mdev->name, queue);
386 static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
388 bool use_short_preamble)
390 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
391 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
392 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
393 DECLARE_MAC_BUF(mac);
397 if (use_protection != bss_conf->use_cts_prot) {
398 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
399 if (net_ratelimit()) {
400 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
403 use_protection ? "enabled" : "disabled",
404 print_mac(mac, ifsta->bssid));
407 bss_conf->use_cts_prot = use_protection;
408 changed |= BSS_CHANGED_ERP_CTS_PROT;
411 if (use_short_preamble != bss_conf->use_short_preamble) {
412 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
413 if (net_ratelimit()) {
414 printk(KERN_DEBUG "%s: switched to %s barker preamble"
417 use_short_preamble ? "short" : "long",
418 print_mac(mac, ifsta->bssid));
421 bss_conf->use_short_preamble = use_short_preamble;
422 changed |= BSS_CHANGED_ERP_PREAMBLE;
428 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
431 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
432 bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
434 return ieee80211_handle_protect_preamb(sdata,
435 use_protection, use_short_preamble);
438 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
439 struct ieee80211_sta_bss *bss)
443 if (bss->has_erp_value)
444 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
446 u16 capab = bss->capability;
447 changed |= ieee80211_handle_protect_preamb(sdata, false,
448 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
454 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
455 struct ieee80211_ht_info *ht_info)
461 memset(ht_info, 0, sizeof(*ht_info));
464 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
466 ht_info->ht_supported = 1;
467 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
468 ht_info->ampdu_factor =
469 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
470 ht_info->ampdu_density =
471 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
472 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
474 ht_info->ht_supported = 0;
479 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
480 struct ieee80211_ht_addt_info *ht_add_info_ie,
481 struct ieee80211_ht_bss_info *bss_info)
483 if (bss_info == NULL)
486 memset(bss_info, 0, sizeof(*bss_info));
488 if (ht_add_info_ie) {
490 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
492 bss_info->primary_channel = ht_add_info_ie->control_chan;
493 bss_info->bss_cap = ht_add_info_ie->ht_param;
494 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
500 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata,
501 struct ieee80211_if_sta *ifsta)
503 union iwreq_data wrqu;
505 if (ifsta->assocreq_ies) {
506 memset(&wrqu, 0, sizeof(wrqu));
507 wrqu.data.length = ifsta->assocreq_ies_len;
508 wireless_send_event(sdata->dev, IWEVASSOCREQIE, &wrqu,
509 ifsta->assocreq_ies);
511 if (ifsta->assocresp_ies) {
512 memset(&wrqu, 0, sizeof(wrqu));
513 wrqu.data.length = ifsta->assocresp_ies_len;
514 wireless_send_event(sdata->dev, IWEVASSOCRESPIE, &wrqu,
515 ifsta->assocresp_ies);
520 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
521 struct ieee80211_if_sta *ifsta,
524 struct ieee80211_local *local = sdata->local;
525 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
526 union iwreq_data wrqu;
527 u32 changed = BSS_CHANGED_ASSOC;
530 struct ieee80211_sta_bss *bss;
532 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
534 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
537 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
538 conf->channel->center_freq,
539 ifsta->ssid, ifsta->ssid_len);
541 /* set timing information */
542 sdata->bss_conf.beacon_int = bss->beacon_int;
543 sdata->bss_conf.timestamp = bss->timestamp;
544 sdata->bss_conf.dtim_period = bss->dtim_period;
546 changed |= ieee80211_handle_bss_capability(sdata, bss);
548 ieee80211_rx_bss_put(local, bss);
551 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
552 changed |= BSS_CHANGED_HT;
553 sdata->bss_conf.assoc_ht = 1;
554 sdata->bss_conf.ht_conf = &conf->ht_conf;
555 sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
558 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
559 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
560 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
561 ieee80211_sta_send_associnfo(sdata, ifsta);
563 netif_carrier_off(sdata->dev);
564 ieee80211_sta_tear_down_BA_sessions(sdata, ifsta->bssid);
565 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
566 changed |= ieee80211_reset_erp_info(sdata);
568 sdata->bss_conf.assoc_ht = 0;
569 sdata->bss_conf.ht_conf = NULL;
570 sdata->bss_conf.ht_bss_conf = NULL;
572 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
574 ifsta->last_probe = jiffies;
575 ieee80211_led_assoc(local, assoc);
577 sdata->bss_conf.assoc = assoc;
578 ieee80211_bss_info_change_notify(sdata, changed);
581 netif_carrier_on(sdata->dev);
583 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
584 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
587 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
588 struct ieee80211_if_sta *ifsta, int deauth)
591 ifsta->direct_probe_tries = 0;
592 ifsta->auth_tries = 0;
594 ifsta->assoc_scan_tries = 0;
595 ifsta->assoc_tries = 0;
596 ieee80211_set_associated(sdata, ifsta, 0);
599 void ieee80211_sta_tx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
602 skb->dev = sdata->local->mdev;
603 skb_set_mac_header(skb, 0);
604 skb_set_network_header(skb, 0);
605 skb_set_transport_header(skb, 0);
607 skb->iif = sdata->dev->ifindex;
608 skb->do_not_encrypt = !encrypt;
614 static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
615 struct ieee80211_if_sta *ifsta,
616 int transaction, u8 *extra, size_t extra_len,
619 struct ieee80211_local *local = sdata->local;
621 struct ieee80211_mgmt *mgmt;
623 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
624 sizeof(*mgmt) + 6 + extra_len);
626 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
627 "frame\n", sdata->dev->name);
630 skb_reserve(skb, local->hw.extra_tx_headroom);
632 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
633 memset(mgmt, 0, 24 + 6);
634 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
635 IEEE80211_STYPE_AUTH);
637 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
638 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
639 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
640 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
641 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
642 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
643 ifsta->auth_transaction = transaction + 1;
644 mgmt->u.auth.status_code = cpu_to_le16(0);
646 memcpy(skb_put(skb, extra_len), extra, extra_len);
648 ieee80211_sta_tx(sdata, skb, encrypt);
651 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
652 struct ieee80211_if_sta *ifsta)
654 DECLARE_MAC_BUF(mac);
656 ifsta->direct_probe_tries++;
657 if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
658 printk(KERN_DEBUG "%s: direct probe to AP %s timed out\n",
659 sdata->dev->name, print_mac(mac, ifsta->bssid));
660 ifsta->state = IEEE80211_STA_MLME_DISABLED;
664 printk(KERN_DEBUG "%s: direct probe to AP %s try %d\n",
665 sdata->dev->name, print_mac(mac, ifsta->bssid),
666 ifsta->direct_probe_tries);
668 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
670 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request);
672 /* Direct probe is sent to broadcast address as some APs
673 * will not answer to direct packet in unassociated state.
675 ieee80211_send_probe_req(sdata, NULL,
676 ifsta->ssid, ifsta->ssid_len);
678 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
682 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
683 struct ieee80211_if_sta *ifsta)
685 DECLARE_MAC_BUF(mac);
688 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
689 printk(KERN_DEBUG "%s: authentication with AP %s"
691 sdata->dev->name, print_mac(mac, ifsta->bssid));
692 ifsta->state = IEEE80211_STA_MLME_DISABLED;
696 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
697 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
698 sdata->dev->name, print_mac(mac, ifsta->bssid));
700 ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
702 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
705 static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss,
706 struct ieee80211_supported_band *sband,
712 for (i = 0; i < bss->supp_rates_len; i++) {
713 int rate = (bss->supp_rates[i] & 0x7F) * 5;
715 for (j = 0; j < sband->n_bitrates; j++)
716 if (sband->bitrates[j].bitrate == rate) {
726 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
727 struct ieee80211_if_sta *ifsta)
729 struct ieee80211_local *local = sdata->local;
731 struct ieee80211_mgmt *mgmt;
732 u8 *pos, *ies, *ht_add_ie;
733 int i, len, count, rates_len, supp_rates_len;
735 struct ieee80211_sta_bss *bss;
737 struct ieee80211_supported_band *sband;
740 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
741 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
744 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
745 "frame\n", sdata->dev->name);
748 skb_reserve(skb, local->hw.extra_tx_headroom);
750 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
752 capab = ifsta->capab;
754 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
755 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
756 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
757 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
758 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
761 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
762 local->hw.conf.channel->center_freq,
763 ifsta->ssid, ifsta->ssid_len);
765 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
766 capab |= WLAN_CAPABILITY_PRIVACY;
770 /* get all rates supported by the device and the AP as
771 * some APs don't like getting a superset of their rates
772 * in the association request (e.g. D-Link DAP 1353 in
774 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
776 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
777 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
778 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
780 ieee80211_rx_bss_put(local, bss);
783 rates_len = sband->n_bitrates;
786 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
788 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
789 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
790 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
792 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
794 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
795 IEEE80211_STYPE_REASSOC_REQ);
796 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
797 mgmt->u.reassoc_req.listen_interval =
798 cpu_to_le16(local->hw.conf.listen_interval);
799 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
803 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
804 IEEE80211_STYPE_ASSOC_REQ);
805 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
806 mgmt->u.reassoc_req.listen_interval =
807 cpu_to_le16(local->hw.conf.listen_interval);
811 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
812 *pos++ = WLAN_EID_SSID;
813 *pos++ = ifsta->ssid_len;
814 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
816 /* add all rates which were marked to be used above */
817 supp_rates_len = rates_len;
818 if (supp_rates_len > 8)
821 len = sband->n_bitrates;
822 pos = skb_put(skb, supp_rates_len + 2);
823 *pos++ = WLAN_EID_SUPP_RATES;
824 *pos++ = supp_rates_len;
827 for (i = 0; i < sband->n_bitrates; i++) {
828 if (BIT(i) & rates) {
829 int rate = sband->bitrates[i].bitrate;
830 *pos++ = (u8) (rate / 5);
836 if (rates_len > count) {
837 pos = skb_put(skb, rates_len - count + 2);
838 *pos++ = WLAN_EID_EXT_SUPP_RATES;
839 *pos++ = rates_len - count;
841 for (i++; i < sband->n_bitrates; i++) {
842 if (BIT(i) & rates) {
843 int rate = sband->bitrates[i].bitrate;
844 *pos++ = (u8) (rate / 5);
849 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
850 /* 1. power capabilities */
851 pos = skb_put(skb, 4);
852 *pos++ = WLAN_EID_PWR_CAPABILITY;
854 *pos++ = 0; /* min tx power */
855 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
857 /* 2. supported channels */
858 /* TODO: get this in reg domain format */
859 pos = skb_put(skb, 2 * sband->n_channels + 2);
860 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
861 *pos++ = 2 * sband->n_channels;
862 for (i = 0; i < sband->n_channels; i++) {
863 *pos++ = ieee80211_frequency_to_channel(
864 sband->channels[i].center_freq);
865 *pos++ = 1; /* one channel in the subband*/
869 if (ifsta->extra_ie) {
870 pos = skb_put(skb, ifsta->extra_ie_len);
871 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
874 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
875 pos = skb_put(skb, 9);
876 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
877 *pos++ = 7; /* len */
878 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
881 *pos++ = 2; /* WME */
882 *pos++ = 0; /* WME info */
883 *pos++ = 1; /* WME ver */
887 /* wmm support is a must to HT */
888 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
889 sband->ht_info.ht_supported &&
890 (ht_add_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_EXTRA_INFO))) {
891 struct ieee80211_ht_addt_info *ht_add_info =
892 (struct ieee80211_ht_addt_info *)ht_add_ie;
893 u16 cap = sband->ht_info.cap;
895 u32 flags = local->hw.conf.channel->flags;
897 switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) {
898 case IEEE80211_HT_IE_CHA_SEC_ABOVE:
899 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
900 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
901 cap &= ~IEEE80211_HT_CAP_SGI_40;
904 case IEEE80211_HT_IE_CHA_SEC_BELOW:
905 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
906 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
907 cap &= ~IEEE80211_HT_CAP_SGI_40;
912 tmp = cpu_to_le16(cap);
913 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
914 *pos++ = WLAN_EID_HT_CAPABILITY;
915 *pos++ = sizeof(struct ieee80211_ht_cap);
916 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
917 memcpy(pos, &tmp, sizeof(u16));
919 /* TODO: needs a define here for << 2 */
920 *pos++ = sband->ht_info.ampdu_factor |
921 (sband->ht_info.ampdu_density << 2);
922 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
925 kfree(ifsta->assocreq_ies);
926 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
927 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
928 if (ifsta->assocreq_ies)
929 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
931 ieee80211_sta_tx(sdata, skb, 0);
935 static void ieee80211_send_deauth(struct ieee80211_sub_if_data *sdata,
936 struct ieee80211_if_sta *ifsta, u16 reason)
938 struct ieee80211_local *local = sdata->local;
940 struct ieee80211_mgmt *mgmt;
942 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
944 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
945 "frame\n", sdata->dev->name);
948 skb_reserve(skb, local->hw.extra_tx_headroom);
950 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
952 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
953 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
954 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
955 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
956 IEEE80211_STYPE_DEAUTH);
958 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
960 ieee80211_sta_tx(sdata, skb, 0);
964 static void ieee80211_send_disassoc(struct ieee80211_sub_if_data *sdata,
965 struct ieee80211_if_sta *ifsta, u16 reason)
967 struct ieee80211_local *local = sdata->local;
969 struct ieee80211_mgmt *mgmt;
971 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
973 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
974 "frame\n", sdata->dev->name);
977 skb_reserve(skb, local->hw.extra_tx_headroom);
979 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
981 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
982 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
983 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
984 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
985 IEEE80211_STYPE_DISASSOC);
987 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
989 ieee80211_sta_tx(sdata, skb, 0);
993 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
994 struct ieee80211_if_sta *ifsta)
996 struct ieee80211_local *local = sdata->local;
997 struct ieee80211_sta_bss *bss;
1000 int privacy_invoked;
1002 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
1005 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
1006 local->hw.conf.channel->center_freq,
1007 ifsta->ssid, ifsta->ssid_len);
1011 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
1012 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
1013 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
1015 ieee80211_rx_bss_put(local, bss);
1017 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
1024 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
1025 struct ieee80211_if_sta *ifsta)
1027 DECLARE_MAC_BUF(mac);
1029 ifsta->assoc_tries++;
1030 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
1031 printk(KERN_DEBUG "%s: association with AP %s"
1033 sdata->dev->name, print_mac(mac, ifsta->bssid));
1034 ifsta->state = IEEE80211_STA_MLME_DISABLED;
1038 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
1039 printk(KERN_DEBUG "%s: associate with AP %s\n",
1040 sdata->dev->name, print_mac(mac, ifsta->bssid));
1041 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
1042 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
1043 "mixed-cell disabled - abort association\n", sdata->dev->name);
1044 ifsta->state = IEEE80211_STA_MLME_DISABLED;
1048 ieee80211_send_assoc(sdata, ifsta);
1050 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1054 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
1055 struct ieee80211_if_sta *ifsta)
1057 struct ieee80211_local *local = sdata->local;
1058 struct sta_info *sta;
1060 DECLARE_MAC_BUF(mac);
1062 /* TODO: start monitoring current AP signal quality and number of
1063 * missed beacons. Scan other channels every now and then and search
1064 * for better APs. */
1065 /* TODO: remove expired BSSes */
1067 ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
1071 sta = sta_info_get(local, ifsta->bssid);
1073 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
1074 sdata->dev->name, print_mac(mac, ifsta->bssid));
1078 if (time_after(jiffies,
1079 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
1080 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
1081 printk(KERN_DEBUG "%s: No ProbeResp from "
1082 "current AP %s - assume out of "
1084 sdata->dev->name, print_mac(mac, ifsta->bssid));
1086 sta_info_unlink(&sta);
1088 ieee80211_send_probe_req(sdata, ifsta->bssid,
1090 local->scan_ssid_len);
1091 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
1093 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1094 if (time_after(jiffies, ifsta->last_probe +
1095 IEEE80211_PROBE_INTERVAL)) {
1096 ifsta->last_probe = jiffies;
1097 ieee80211_send_probe_req(sdata, ifsta->bssid,
1106 if (disassoc && sta)
1107 sta_info_destroy(sta);
1110 ifsta->state = IEEE80211_STA_MLME_DISABLED;
1111 ieee80211_set_associated(sdata, ifsta, 0);
1113 mod_timer(&ifsta->timer, jiffies +
1114 IEEE80211_MONITORING_INTERVAL);
1119 static void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1120 u8 *ssid, size_t ssid_len)
1122 struct ieee80211_local *local = sdata->local;
1123 struct ieee80211_supported_band *sband;
1124 struct sk_buff *skb;
1125 struct ieee80211_mgmt *mgmt;
1126 u8 *pos, *supp_rates, *esupp_rates = NULL;
1129 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
1131 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1132 "request\n", sdata->dev->name);
1135 skb_reserve(skb, local->hw.extra_tx_headroom);
1137 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1138 memset(mgmt, 0, 24);
1139 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1140 IEEE80211_STYPE_PROBE_REQ);
1141 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1143 memcpy(mgmt->da, dst, ETH_ALEN);
1144 memcpy(mgmt->bssid, dst, ETH_ALEN);
1146 memset(mgmt->da, 0xff, ETH_ALEN);
1147 memset(mgmt->bssid, 0xff, ETH_ALEN);
1149 pos = skb_put(skb, 2 + ssid_len);
1150 *pos++ = WLAN_EID_SSID;
1152 memcpy(pos, ssid, ssid_len);
1154 supp_rates = skb_put(skb, 2);
1155 supp_rates[0] = WLAN_EID_SUPP_RATES;
1157 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1159 for (i = 0; i < sband->n_bitrates; i++) {
1160 struct ieee80211_rate *rate = &sband->bitrates[i];
1162 pos = skb_put(skb, 1);
1164 } else if (supp_rates[1] == 8) {
1165 esupp_rates = skb_put(skb, 3);
1166 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1168 pos = &esupp_rates[2];
1170 pos = skb_put(skb, 1);
1173 *pos = rate->bitrate / 5;
1176 ieee80211_sta_tx(sdata, skb, 0);
1180 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
1182 if (!sdata || !sdata->default_key ||
1183 sdata->default_key->conf.alg != ALG_WEP)
1189 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
1190 struct ieee80211_if_sta *ifsta)
1192 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1193 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1194 ieee80211_associate(sdata, ifsta);
1198 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1199 struct ieee80211_if_sta *ifsta,
1200 struct ieee80211_mgmt *mgmt,
1204 struct ieee802_11_elems elems;
1206 pos = mgmt->u.auth.variable;
1207 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1208 if (!elems.challenge)
1210 ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
1211 elems.challenge_len + 2, 1);
1214 static void ieee80211_send_addba_resp(struct ieee80211_sub_if_data *sdata, u8 *da, u16 tid,
1215 u8 dialog_token, u16 status, u16 policy,
1216 u16 buf_size, u16 timeout)
1218 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1219 struct ieee80211_local *local = sdata->local;
1220 struct sk_buff *skb;
1221 struct ieee80211_mgmt *mgmt;
1224 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1227 printk(KERN_DEBUG "%s: failed to allocate buffer "
1228 "for addba resp frame\n", sdata->dev->name);
1232 skb_reserve(skb, local->hw.extra_tx_headroom);
1233 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1234 memset(mgmt, 0, 24);
1235 memcpy(mgmt->da, da, ETH_ALEN);
1236 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1237 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1238 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
1240 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1241 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1242 IEEE80211_STYPE_ACTION);
1244 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1245 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1246 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1247 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1249 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1250 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1251 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1253 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1254 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1255 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1257 ieee80211_sta_tx(sdata, skb, 0);
1262 void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata, const u8 *da,
1263 u16 tid, u8 dialog_token, u16 start_seq_num,
1264 u16 agg_size, u16 timeout)
1266 struct ieee80211_local *local = sdata->local;
1267 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1268 struct sk_buff *skb;
1269 struct ieee80211_mgmt *mgmt;
1272 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1275 printk(KERN_ERR "%s: failed to allocate buffer "
1276 "for addba request frame\n", sdata->dev->name);
1279 skb_reserve(skb, local->hw.extra_tx_headroom);
1280 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1281 memset(mgmt, 0, 24);
1282 memcpy(mgmt->da, da, ETH_ALEN);
1283 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1284 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1285 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
1287 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1289 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1290 IEEE80211_STYPE_ACTION);
1292 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1294 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1295 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1297 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1298 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
1299 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1300 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
1302 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1304 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1305 mgmt->u.action.u.addba_req.start_seq_num =
1306 cpu_to_le16(start_seq_num << 4);
1308 ieee80211_sta_tx(sdata, skb, 0);
1311 static void ieee80211_sta_process_addba_request(struct ieee80211_local *local,
1312 struct ieee80211_mgmt *mgmt,
1315 struct ieee80211_hw *hw = &local->hw;
1316 struct ieee80211_conf *conf = &hw->conf;
1317 struct sta_info *sta;
1318 struct tid_ampdu_rx *tid_agg_rx;
1319 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1321 int ret = -EOPNOTSUPP;
1322 DECLARE_MAC_BUF(mac);
1326 sta = sta_info_get(local, mgmt->sa);
1332 /* extract session parameters from addba request frame */
1333 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1334 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1336 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1338 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1339 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1340 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1341 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1343 status = WLAN_STATUS_REQUEST_DECLINED;
1345 /* sanity check for incoming parameters:
1346 * check if configuration can support the BA policy
1347 * and if buffer size does not exceeds max value */
1348 if (((ba_policy != 1)
1349 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1350 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1351 status = WLAN_STATUS_INVALID_QOS_PARAM;
1352 #ifdef CONFIG_MAC80211_HT_DEBUG
1353 if (net_ratelimit())
1354 printk(KERN_DEBUG "AddBA Req with bad params from "
1355 "%s on tid %u. policy %d, buffer size %d\n",
1356 print_mac(mac, mgmt->sa), tid, ba_policy,
1358 #endif /* CONFIG_MAC80211_HT_DEBUG */
1361 /* determine default buffer size */
1362 if (buf_size == 0) {
1363 struct ieee80211_supported_band *sband;
1365 sband = local->hw.wiphy->bands[conf->channel->band];
1366 buf_size = IEEE80211_MIN_AMPDU_BUF;
1367 buf_size = buf_size << sband->ht_info.ampdu_factor;
1371 /* examine state machine */
1372 spin_lock_bh(&sta->lock);
1374 if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
1375 #ifdef CONFIG_MAC80211_HT_DEBUG
1376 if (net_ratelimit())
1377 printk(KERN_DEBUG "unexpected AddBA Req from "
1379 print_mac(mac, mgmt->sa), tid);
1380 #endif /* CONFIG_MAC80211_HT_DEBUG */
1384 /* prepare A-MPDU MLME for Rx aggregation */
1385 sta->ampdu_mlme.tid_rx[tid] =
1386 kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1387 if (!sta->ampdu_mlme.tid_rx[tid]) {
1388 #ifdef CONFIG_MAC80211_HT_DEBUG
1389 if (net_ratelimit())
1390 printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1396 sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1397 sta_rx_agg_session_timer_expired;
1398 sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1399 (unsigned long)&sta->timer_to_tid[tid];
1400 init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1402 tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1404 /* prepare reordering buffer */
1405 tid_agg_rx->reorder_buf =
1406 kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC);
1407 if (!tid_agg_rx->reorder_buf) {
1408 #ifdef CONFIG_MAC80211_HT_DEBUG
1409 if (net_ratelimit())
1410 printk(KERN_ERR "can not allocate reordering buffer "
1411 "to tid %d\n", tid);
1413 kfree(sta->ampdu_mlme.tid_rx[tid]);
1416 memset(tid_agg_rx->reorder_buf, 0,
1417 buf_size * sizeof(struct sk_buff *));
1419 if (local->ops->ampdu_action)
1420 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1421 sta->addr, tid, &start_seq_num);
1422 #ifdef CONFIG_MAC80211_HT_DEBUG
1423 printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
1424 #endif /* CONFIG_MAC80211_HT_DEBUG */
1427 kfree(tid_agg_rx->reorder_buf);
1429 sta->ampdu_mlme.tid_rx[tid] = NULL;
1433 /* change state and send addba resp */
1434 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
1435 tid_agg_rx->dialog_token = dialog_token;
1436 tid_agg_rx->ssn = start_seq_num;
1437 tid_agg_rx->head_seq_num = start_seq_num;
1438 tid_agg_rx->buf_size = buf_size;
1439 tid_agg_rx->timeout = timeout;
1440 tid_agg_rx->stored_mpdu_num = 0;
1441 status = WLAN_STATUS_SUCCESS;
1443 spin_unlock_bh(&sta->lock);
1446 ieee80211_send_addba_resp(sta->sdata, sta->addr, tid,
1447 dialog_token, status, 1, buf_size, timeout);
1451 static void ieee80211_sta_process_addba_resp(struct ieee80211_local *local,
1452 struct ieee80211_mgmt *mgmt,
1455 struct ieee80211_hw *hw = &local->hw;
1456 struct sta_info *sta;
1463 sta = sta_info_get(local, mgmt->sa);
1469 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1470 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1472 state = &sta->ampdu_mlme.tid_state_tx[tid];
1474 spin_lock_bh(&sta->lock);
1476 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1477 spin_unlock_bh(&sta->lock);
1478 goto addba_resp_exit;
1481 if (mgmt->u.action.u.addba_resp.dialog_token !=
1482 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
1483 spin_unlock_bh(&sta->lock);
1484 #ifdef CONFIG_MAC80211_HT_DEBUG
1485 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1486 #endif /* CONFIG_MAC80211_HT_DEBUG */
1487 goto addba_resp_exit;
1490 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
1491 #ifdef CONFIG_MAC80211_HT_DEBUG
1492 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1493 #endif /* CONFIG_MAC80211_HT_DEBUG */
1494 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1495 == WLAN_STATUS_SUCCESS) {
1496 *state |= HT_ADDBA_RECEIVED_MSK;
1497 sta->ampdu_mlme.addba_req_num[tid] = 0;
1499 if (*state == HT_AGG_STATE_OPERATIONAL)
1500 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1502 spin_unlock_bh(&sta->lock);
1504 sta->ampdu_mlme.addba_req_num[tid]++;
1505 /* this will allow the state check in stop_BA_session */
1506 *state = HT_AGG_STATE_OPERATIONAL;
1507 spin_unlock_bh(&sta->lock);
1508 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1509 WLAN_BACK_INITIATOR);
1516 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata, const u8 *da, u16 tid,
1517 u16 initiator, u16 reason_code)
1519 struct ieee80211_local *local = sdata->local;
1520 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1521 struct sk_buff *skb;
1522 struct ieee80211_mgmt *mgmt;
1525 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1528 printk(KERN_ERR "%s: failed to allocate buffer "
1529 "for delba frame\n", sdata->dev->name);
1533 skb_reserve(skb, local->hw.extra_tx_headroom);
1534 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1535 memset(mgmt, 0, 24);
1536 memcpy(mgmt->da, da, ETH_ALEN);
1537 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1538 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1539 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
1541 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1542 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1543 IEEE80211_STYPE_ACTION);
1545 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1547 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1548 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1549 params = (u16)(initiator << 11); /* bit 11 initiator */
1550 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1552 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1553 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1555 ieee80211_sta_tx(sdata, skb, 0);
1558 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn)
1560 struct ieee80211_local *local = sdata->local;
1561 struct sk_buff *skb;
1562 struct ieee80211_bar *bar;
1563 u16 bar_control = 0;
1565 skb = dev_alloc_skb(sizeof(*bar) + local->hw.extra_tx_headroom);
1567 printk(KERN_ERR "%s: failed to allocate buffer for "
1568 "bar frame\n", sdata->dev->name);
1571 skb_reserve(skb, local->hw.extra_tx_headroom);
1572 bar = (struct ieee80211_bar *)skb_put(skb, sizeof(*bar));
1573 memset(bar, 0, sizeof(*bar));
1574 bar->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
1575 IEEE80211_STYPE_BACK_REQ);
1576 memcpy(bar->ra, ra, ETH_ALEN);
1577 memcpy(bar->ta, sdata->dev->dev_addr, ETH_ALEN);
1578 bar_control |= (u16)IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL;
1579 bar_control |= (u16)IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA;
1580 bar_control |= (u16)(tid << 12);
1581 bar->control = cpu_to_le16(bar_control);
1582 bar->start_seq_num = cpu_to_le16(ssn);
1584 ieee80211_sta_tx(sdata, skb, 0);
1587 void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid,
1588 u16 initiator, u16 reason)
1590 struct ieee80211_local *local = sdata->local;
1591 struct ieee80211_hw *hw = &local->hw;
1592 struct sta_info *sta;
1594 DECLARE_MAC_BUF(mac);
1598 sta = sta_info_get(local, ra);
1604 /* check if TID is in operational state */
1605 spin_lock_bh(&sta->lock);
1606 if (sta->ampdu_mlme.tid_state_rx[tid]
1607 != HT_AGG_STATE_OPERATIONAL) {
1608 spin_unlock_bh(&sta->lock);
1612 sta->ampdu_mlme.tid_state_rx[tid] =
1613 HT_AGG_STATE_REQ_STOP_BA_MSK |
1614 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1615 spin_unlock_bh(&sta->lock);
1617 /* stop HW Rx aggregation. ampdu_action existence
1618 * already verified in session init so we add the BUG_ON */
1619 BUG_ON(!local->ops->ampdu_action);
1621 #ifdef CONFIG_MAC80211_HT_DEBUG
1622 printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n",
1623 print_mac(mac, ra), tid);
1624 #endif /* CONFIG_MAC80211_HT_DEBUG */
1626 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1629 printk(KERN_DEBUG "HW problem - can not stop rx "
1630 "aggregation for tid %d\n", tid);
1632 /* shutdown timer has not expired */
1633 if (initiator != WLAN_BACK_TIMER)
1634 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1636 /* check if this is a self generated aggregation halt */
1637 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1638 ieee80211_send_delba(sdata, ra, tid, 0, reason);
1640 /* free the reordering buffer */
1641 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1642 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
1643 /* release the reordered frames */
1644 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1645 sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1646 sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
1649 /* free resources */
1650 kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1651 kfree(sta->ampdu_mlme.tid_rx[tid]);
1652 sta->ampdu_mlme.tid_rx[tid] = NULL;
1653 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
1659 static void ieee80211_sta_process_delba(struct ieee80211_sub_if_data *sdata,
1660 struct ieee80211_mgmt *mgmt, size_t len)
1662 struct ieee80211_local *local = sdata->local;
1663 struct sta_info *sta;
1666 DECLARE_MAC_BUF(mac);
1670 sta = sta_info_get(local, mgmt->sa);
1676 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1677 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1678 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1680 #ifdef CONFIG_MAC80211_HT_DEBUG
1681 if (net_ratelimit())
1682 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1683 print_mac(mac, mgmt->sa),
1684 initiator ? "initiator" : "recipient", tid,
1685 mgmt->u.action.u.delba.reason_code);
1686 #endif /* CONFIG_MAC80211_HT_DEBUG */
1688 if (initiator == WLAN_BACK_INITIATOR)
1689 ieee80211_sta_stop_rx_ba_session(sdata, sta->addr, tid,
1690 WLAN_BACK_INITIATOR, 0);
1691 else { /* WLAN_BACK_RECIPIENT */
1692 spin_lock_bh(&sta->lock);
1693 sta->ampdu_mlme.tid_state_tx[tid] =
1694 HT_AGG_STATE_OPERATIONAL;
1695 spin_unlock_bh(&sta->lock);
1696 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1697 WLAN_BACK_RECIPIENT);
1703 * After sending add Block Ack request we activated a timer until
1704 * add Block Ack response will arrive from the recipient.
1705 * If this timer expires sta_addba_resp_timer_expired will be executed.
1707 void sta_addba_resp_timer_expired(unsigned long data)
1709 /* not an elegant detour, but there is no choice as the timer passes
1710 * only one argument, and both sta_info and TID are needed, so init
1711 * flow in sta_info_create gives the TID as data, while the timer_to_id
1712 * array gives the sta through container_of */
1713 u16 tid = *(u8 *)data;
1714 struct sta_info *temp_sta = container_of((void *)data,
1715 struct sta_info, timer_to_tid[tid]);
1717 struct ieee80211_local *local = temp_sta->local;
1718 struct ieee80211_hw *hw = &local->hw;
1719 struct sta_info *sta;
1724 sta = sta_info_get(local, temp_sta->addr);
1730 state = &sta->ampdu_mlme.tid_state_tx[tid];
1731 /* check if the TID waits for addBA response */
1732 spin_lock_bh(&sta->lock);
1733 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1734 spin_unlock_bh(&sta->lock);
1735 *state = HT_AGG_STATE_IDLE;
1736 #ifdef CONFIG_MAC80211_HT_DEBUG
1737 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1738 "expecting addBA response there", tid);
1740 goto timer_expired_exit;
1743 #ifdef CONFIG_MAC80211_HT_DEBUG
1744 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1747 /* go through the state check in stop_BA_session */
1748 *state = HT_AGG_STATE_OPERATIONAL;
1749 spin_unlock_bh(&sta->lock);
1750 ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1751 WLAN_BACK_INITIATOR);
1758 * After accepting the AddBA Request we activated a timer,
1759 * resetting it after each frame that arrives from the originator.
1760 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1762 static void sta_rx_agg_session_timer_expired(unsigned long data)
1764 /* not an elegant detour, but there is no choice as the timer passes
1765 * only one argument, and various sta_info are needed here, so init
1766 * flow in sta_info_create gives the TID as data, while the timer_to_id
1767 * array gives the sta through container_of */
1768 u8 *ptid = (u8 *)data;
1769 u8 *timer_to_id = ptid - *ptid;
1770 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1773 #ifdef CONFIG_MAC80211_HT_DEBUG
1774 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1776 ieee80211_sta_stop_rx_ba_session(sta->sdata, sta->addr,
1777 (u16)*ptid, WLAN_BACK_TIMER,
1778 WLAN_REASON_QSTA_TIMEOUT);
1781 void ieee80211_sta_tear_down_BA_sessions(struct ieee80211_sub_if_data *sdata, u8 *addr)
1783 struct ieee80211_local *local = sdata->local;
1786 for (i = 0; i < STA_TID_NUM; i++) {
1787 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1788 WLAN_BACK_INITIATOR);
1789 ieee80211_sta_stop_rx_ba_session(sdata, addr, i,
1790 WLAN_BACK_RECIPIENT,
1791 WLAN_REASON_QSTA_LEAVE_QBSS);
1795 static void ieee80211_send_refuse_measurement_request(struct ieee80211_sub_if_data *sdata,
1796 struct ieee80211_msrment_ie *request_ie,
1797 const u8 *da, const u8 *bssid,
1800 struct ieee80211_local *local = sdata->local;
1801 struct sk_buff *skb;
1802 struct ieee80211_mgmt *msr_report;
1804 skb = dev_alloc_skb(sizeof(*msr_report) + local->hw.extra_tx_headroom +
1805 sizeof(struct ieee80211_msrment_ie));
1808 printk(KERN_ERR "%s: failed to allocate buffer for "
1809 "measurement report frame\n", sdata->dev->name);
1813 skb_reserve(skb, local->hw.extra_tx_headroom);
1814 msr_report = (struct ieee80211_mgmt *)skb_put(skb, 24);
1815 memset(msr_report, 0, 24);
1816 memcpy(msr_report->da, da, ETH_ALEN);
1817 memcpy(msr_report->sa, sdata->dev->dev_addr, ETH_ALEN);
1818 memcpy(msr_report->bssid, bssid, ETH_ALEN);
1819 msr_report->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1820 IEEE80211_STYPE_ACTION);
1822 skb_put(skb, 1 + sizeof(msr_report->u.action.u.measurement));
1823 msr_report->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
1824 msr_report->u.action.u.measurement.action_code =
1825 WLAN_ACTION_SPCT_MSR_RPRT;
1826 msr_report->u.action.u.measurement.dialog_token = dialog_token;
1828 msr_report->u.action.u.measurement.element_id = WLAN_EID_MEASURE_REPORT;
1829 msr_report->u.action.u.measurement.length =
1830 sizeof(struct ieee80211_msrment_ie);
1832 memset(&msr_report->u.action.u.measurement.msr_elem, 0,
1833 sizeof(struct ieee80211_msrment_ie));
1834 msr_report->u.action.u.measurement.msr_elem.token = request_ie->token;
1835 msr_report->u.action.u.measurement.msr_elem.mode |=
1836 IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED;
1837 msr_report->u.action.u.measurement.msr_elem.type = request_ie->type;
1839 ieee80211_sta_tx(sdata, skb, 0);
1842 static void ieee80211_sta_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1843 struct ieee80211_mgmt *mgmt,
1847 * Ignoring measurement request is spec violation.
1848 * Mandatory measurements must be reported optional
1849 * measurements might be refused or reported incapable
1850 * For now just refuse
1851 * TODO: Answer basic measurement as unmeasured
1853 ieee80211_send_refuse_measurement_request(sdata,
1854 &mgmt->u.action.u.measurement.msr_elem,
1855 mgmt->sa, mgmt->bssid,
1856 mgmt->u.action.u.measurement.dialog_token);
1860 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1861 struct ieee80211_if_sta *ifsta,
1862 struct ieee80211_mgmt *mgmt,
1865 u16 auth_alg, auth_transaction, status_code;
1866 DECLARE_MAC_BUF(mac);
1868 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
1869 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
1875 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1876 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1879 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1880 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1883 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1884 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1885 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1887 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1889 * IEEE 802.11 standard does not require authentication in IBSS
1890 * networks and most implementations do not seem to use it.
1891 * However, try to reply to authentication attempts if someone
1892 * has actually implemented this.
1894 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
1896 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
1899 if (auth_alg != ifsta->auth_alg ||
1900 auth_transaction != ifsta->auth_transaction)
1903 if (status_code != WLAN_STATUS_SUCCESS) {
1904 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1906 const int num_algs = ARRAY_SIZE(algs);
1908 algs[0] = algs[1] = algs[2] = 0xff;
1909 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1910 algs[0] = WLAN_AUTH_OPEN;
1911 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1912 algs[1] = WLAN_AUTH_SHARED_KEY;
1913 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1914 algs[2] = WLAN_AUTH_LEAP;
1915 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1917 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1921 for (i = 0; i < num_algs; i++) {
1923 if (pos >= num_algs)
1925 if (algs[pos] == ifsta->auth_alg ||
1928 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1929 !ieee80211_sta_wep_configured(sdata))
1931 ifsta->auth_alg = algs[pos];
1938 switch (ifsta->auth_alg) {
1939 case WLAN_AUTH_OPEN:
1940 case WLAN_AUTH_LEAP:
1941 ieee80211_auth_completed(sdata, ifsta);
1943 case WLAN_AUTH_SHARED_KEY:
1944 if (ifsta->auth_transaction == 4)
1945 ieee80211_auth_completed(sdata, ifsta);
1947 ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
1953 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1954 struct ieee80211_if_sta *ifsta,
1955 struct ieee80211_mgmt *mgmt,
1959 DECLARE_MAC_BUF(mac);
1964 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1967 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1969 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
1970 printk(KERN_DEBUG "%s: deauthenticated\n", sdata->dev->name);
1972 if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1973 ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
1974 ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1975 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1976 mod_timer(&ifsta->timer, jiffies +
1977 IEEE80211_RETRY_AUTH_INTERVAL);
1980 ieee80211_set_disassoc(sdata, ifsta, 1);
1981 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1985 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1986 struct ieee80211_if_sta *ifsta,
1987 struct ieee80211_mgmt *mgmt,
1991 DECLARE_MAC_BUF(mac);
1996 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1999 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2001 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
2002 printk(KERN_DEBUG "%s: disassociated\n", sdata->dev->name);
2004 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
2005 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
2006 mod_timer(&ifsta->timer, jiffies +
2007 IEEE80211_RETRY_AUTH_INTERVAL);
2010 ieee80211_set_disassoc(sdata, ifsta, 0);
2014 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2015 struct ieee80211_if_sta *ifsta,
2016 struct ieee80211_mgmt *mgmt,
2020 struct ieee80211_local *local = sdata->local;
2021 struct ieee80211_supported_band *sband;
2022 struct sta_info *sta;
2023 u64 rates, basic_rates;
2024 u16 capab_info, status_code, aid;
2025 struct ieee802_11_elems elems;
2026 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
2029 DECLARE_MAC_BUF(mac);
2030 bool have_higher_than_11mbit = false;
2032 /* AssocResp and ReassocResp have identical structure, so process both
2033 * of them in this function. */
2035 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
2041 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
2044 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2045 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2046 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2048 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
2049 "status=%d aid=%d)\n",
2050 sdata->dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
2051 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2053 if (status_code != WLAN_STATUS_SUCCESS) {
2054 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
2055 sdata->dev->name, status_code);
2056 /* if this was a reassociation, ensure we try a "full"
2057 * association next time. This works around some broken APs
2058 * which do not correctly reject reassociation requests. */
2059 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2063 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2064 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
2065 "set\n", sdata->dev->name, aid);
2066 aid &= ~(BIT(15) | BIT(14));
2068 pos = mgmt->u.assoc_resp.variable;
2069 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2071 if (!elems.supp_rates) {
2072 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
2077 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
2079 ifsta->ap_capab = capab_info;
2081 kfree(ifsta->assocresp_ies);
2082 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
2083 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
2084 if (ifsta->assocresp_ies)
2085 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
2089 /* Add STA entry for the AP */
2090 sta = sta_info_get(local, ifsta->bssid);
2092 struct ieee80211_sta_bss *bss;
2095 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
2097 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
2098 " the AP\n", sdata->dev->name);
2102 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
2103 local->hw.conf.channel->center_freq,
2104 ifsta->ssid, ifsta->ssid_len);
2106 sta->last_signal = bss->signal;
2107 sta->last_qual = bss->qual;
2108 sta->last_noise = bss->noise;
2109 ieee80211_rx_bss_put(local, bss);
2112 err = sta_info_insert(sta);
2114 printk(KERN_DEBUG "%s: failed to insert STA entry for"
2115 " the AP (error %d)\n", sdata->dev->name, err);
2119 /* update new sta with its last rx activity */
2120 sta->last_rx = jiffies;
2124 * FIXME: Do we really need to update the sta_info's information here?
2125 * We already know about the AP (we found it in our list) so it
2126 * should already be filled with the right info, no?
2127 * As is stands, all this is racy because typically we assume
2128 * the information that is filled in here (except flags) doesn't
2129 * change while a STA structure is alive. As such, it should move
2130 * to between the sta_info_alloc() and sta_info_insert() above.
2133 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
2134 WLAN_STA_AUTHORIZED);
2138 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2140 for (i = 0; i < elems.supp_rates_len; i++) {
2141 int rate = (elems.supp_rates[i] & 0x7f) * 5;
2144 have_higher_than_11mbit = true;
2146 for (j = 0; j < sband->n_bitrates; j++) {
2147 if (sband->bitrates[j].bitrate == rate)
2149 if (elems.supp_rates[i] & 0x80)
2150 basic_rates |= BIT(j);
2154 for (i = 0; i < elems.ext_supp_rates_len; i++) {
2155 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
2158 have_higher_than_11mbit = true;
2160 for (j = 0; j < sband->n_bitrates; j++) {
2161 if (sband->bitrates[j].bitrate == rate)
2163 if (elems.ext_supp_rates[i] & 0x80)
2164 basic_rates |= BIT(j);
2168 sta->supp_rates[local->hw.conf.channel->band] = rates;
2169 sdata->basic_rates = basic_rates;
2171 /* cf. IEEE 802.11 9.2.12 */
2172 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2173 have_higher_than_11mbit)
2174 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2176 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
2178 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
2179 (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2180 struct ieee80211_ht_bss_info bss_info;
2181 ieee80211_ht_cap_ie_to_ht_info(
2182 (struct ieee80211_ht_cap *)
2183 elems.ht_cap_elem, &sta->ht_info);
2184 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2185 (struct ieee80211_ht_addt_info *)
2186 elems.ht_info_elem, &bss_info);
2187 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
2190 rate_control_rate_init(sta, local);
2192 if (elems.wmm_param) {
2193 set_sta_flags(sta, WLAN_STA_WME);
2195 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
2196 elems.wmm_param_len);
2200 /* set AID and assoc capability,
2201 * ieee80211_set_associated() will tell the driver */
2202 bss_conf->aid = aid;
2203 bss_conf->assoc_capability = capab_info;
2204 ieee80211_set_associated(sdata, ifsta, 1);
2206 ieee80211_associated(sdata, ifsta);
2210 /* Caller must hold local->sta_bss_lock */
2211 static void __ieee80211_rx_bss_hash_add(struct ieee80211_local *local,
2212 struct ieee80211_sta_bss *bss)
2216 if (bss_mesh_cfg(bss))
2217 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2218 bss_mesh_id_len(bss));
2220 hash_idx = STA_HASH(bss->bssid);
2222 bss->hnext = local->sta_bss_hash[hash_idx];
2223 local->sta_bss_hash[hash_idx] = bss;
2227 /* Caller must hold local->sta_bss_lock */
2228 static void __ieee80211_rx_bss_hash_del(struct ieee80211_local *local,
2229 struct ieee80211_sta_bss *bss)
2231 struct ieee80211_sta_bss *b, *prev = NULL;
2232 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2236 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2239 prev->hnext = bss->hnext;
2248 static struct ieee80211_sta_bss *
2249 ieee80211_rx_bss_add(struct ieee80211_sub_if_data *sdata, u8 *bssid, int freq,
2250 u8 *ssid, u8 ssid_len)
2252 struct ieee80211_local *local = sdata->local;
2253 struct ieee80211_sta_bss *bss;
2255 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2258 atomic_inc(&bss->users);
2259 atomic_inc(&bss->users);
2260 memcpy(bss->bssid, bssid, ETH_ALEN);
2262 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2263 memcpy(bss->ssid, ssid, ssid_len);
2264 bss->ssid_len = ssid_len;
2267 spin_lock_bh(&local->sta_bss_lock);
2268 /* TODO: order by RSSI? */
2269 list_add_tail(&bss->list, &local->sta_bss_list);
2270 __ieee80211_rx_bss_hash_add(local, bss);
2271 spin_unlock_bh(&local->sta_bss_lock);
2275 static struct ieee80211_sta_bss *
2276 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
2277 u8 *ssid, u8 ssid_len)
2279 struct ieee80211_sta_bss *bss;
2281 spin_lock_bh(&local->sta_bss_lock);
2282 bss = local->sta_bss_hash[STA_HASH(bssid)];
2284 if (!bss_mesh_cfg(bss) &&
2285 !memcmp(bss->bssid, bssid, ETH_ALEN) &&
2286 bss->freq == freq &&
2287 bss->ssid_len == ssid_len &&
2288 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
2289 atomic_inc(&bss->users);
2294 spin_unlock_bh(&local->sta_bss_lock);
2298 #ifdef CONFIG_MAC80211_MESH
2299 static struct ieee80211_sta_bss *
2300 ieee80211_rx_mesh_bss_get(struct ieee80211_local *local, u8 *mesh_id, int mesh_id_len,
2301 u8 *mesh_cfg, int freq)
2303 struct ieee80211_sta_bss *bss;
2305 spin_lock_bh(&local->sta_bss_lock);
2306 bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2308 if (bss_mesh_cfg(bss) &&
2309 !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
2310 bss->freq == freq &&
2311 mesh_id_len == bss->mesh_id_len &&
2312 (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2314 atomic_inc(&bss->users);
2319 spin_unlock_bh(&local->sta_bss_lock);
2323 static struct ieee80211_sta_bss *
2324 ieee80211_rx_mesh_bss_add(struct ieee80211_local *local, u8 *mesh_id, int mesh_id_len,
2325 u8 *mesh_cfg, int mesh_config_len, int freq)
2327 struct ieee80211_sta_bss *bss;
2329 if (mesh_config_len != MESH_CFG_LEN)
2332 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2336 bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
2337 if (!bss->mesh_cfg) {
2342 if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2343 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2344 if (!bss->mesh_id) {
2345 kfree(bss->mesh_cfg);
2349 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2352 atomic_inc(&bss->users);
2353 atomic_inc(&bss->users);
2354 memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
2355 bss->mesh_id_len = mesh_id_len;
2357 spin_lock_bh(&local->sta_bss_lock);
2358 /* TODO: order by RSSI? */
2359 list_add_tail(&bss->list, &local->sta_bss_list);
2360 __ieee80211_rx_bss_hash_add(local, bss);
2361 spin_unlock_bh(&local->sta_bss_lock);
2366 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2369 kfree(bss_mesh_id(bss));
2370 kfree(bss_mesh_cfg(bss));
2375 static void ieee80211_rx_bss_put(struct ieee80211_local *local,
2376 struct ieee80211_sta_bss *bss)
2379 if (!atomic_dec_and_lock(&bss->users, &local->sta_bss_lock)) {
2384 __ieee80211_rx_bss_hash_del(local, bss);
2385 list_del(&bss->list);
2386 spin_unlock_bh(&local->sta_bss_lock);
2387 ieee80211_rx_bss_free(bss);
2391 void ieee80211_rx_bss_list_init(struct ieee80211_local *local)
2393 spin_lock_init(&local->sta_bss_lock);
2394 INIT_LIST_HEAD(&local->sta_bss_list);
2398 void ieee80211_rx_bss_list_deinit(struct ieee80211_local *local)
2400 struct ieee80211_sta_bss *bss, *tmp;
2402 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2403 ieee80211_rx_bss_put(local, bss);
2407 static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
2408 struct ieee80211_if_sta *ifsta,
2409 struct ieee80211_sta_bss *bss)
2411 struct ieee80211_local *local = sdata->local;
2412 int res, rates, i, j;
2413 struct sk_buff *skb;
2414 struct ieee80211_mgmt *mgmt;
2416 struct ieee80211_supported_band *sband;
2417 union iwreq_data wrqu;
2419 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2421 /* Remove possible STA entries from other IBSS networks. */
2422 sta_info_flush_delayed(sdata);
2424 if (local->ops->reset_tsf) {
2425 /* Reset own TSF to allow time synchronization work. */
2426 local->ops->reset_tsf(local_to_hw(local));
2428 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2429 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
2433 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2435 sdata->drop_unencrypted = bss->capability &
2436 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2438 res = ieee80211_set_freq(sdata, bss->freq);
2443 /* Build IBSS probe response */
2444 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2446 skb_reserve(skb, local->hw.extra_tx_headroom);
2448 mgmt = (struct ieee80211_mgmt *)
2449 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2450 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2451 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2452 IEEE80211_STYPE_PROBE_RESP);
2453 memset(mgmt->da, 0xff, ETH_ALEN);
2454 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
2455 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2456 mgmt->u.beacon.beacon_int =
2457 cpu_to_le16(local->hw.conf.beacon_int);
2458 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
2459 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2461 pos = skb_put(skb, 2 + ifsta->ssid_len);
2462 *pos++ = WLAN_EID_SSID;
2463 *pos++ = ifsta->ssid_len;
2464 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2466 rates = bss->supp_rates_len;
2469 pos = skb_put(skb, 2 + rates);
2470 *pos++ = WLAN_EID_SUPP_RATES;
2472 memcpy(pos, bss->supp_rates, rates);
2474 if (bss->band == IEEE80211_BAND_2GHZ) {
2475 pos = skb_put(skb, 2 + 1);
2476 *pos++ = WLAN_EID_DS_PARAMS;
2478 *pos++ = ieee80211_frequency_to_channel(bss->freq);
2481 pos = skb_put(skb, 2 + 2);
2482 *pos++ = WLAN_EID_IBSS_PARAMS;
2484 /* FIX: set ATIM window based on scan results */
2488 if (bss->supp_rates_len > 8) {
2489 rates = bss->supp_rates_len - 8;
2490 pos = skb_put(skb, 2 + rates);
2491 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2493 memcpy(pos, &bss->supp_rates[8], rates);
2496 ifsta->probe_resp = skb;
2498 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
2502 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2503 for (i = 0; i < bss->supp_rates_len; i++) {
2504 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2505 for (j = 0; j < sband->n_bitrates; j++)
2506 if (sband->bitrates[j].bitrate == bitrate)
2509 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2511 ieee80211_sta_def_wmm_params(sdata, bss, 1);
2513 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
2514 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2516 memset(&wrqu, 0, sizeof(wrqu));
2517 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
2518 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
2523 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2524 struct ieee802_11_elems *elems,
2525 enum ieee80211_band band)
2527 struct ieee80211_supported_band *sband;
2528 struct ieee80211_rate *bitrates;
2532 sband = local->hw.wiphy->bands[band];
2536 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2539 bitrates = sband->bitrates;
2540 num_rates = sband->n_bitrates;
2542 for (i = 0; i < elems->supp_rates_len +
2543 elems->ext_supp_rates_len; i++) {
2546 if (i < elems->supp_rates_len)
2547 rate = elems->supp_rates[i];
2548 else if (elems->ext_supp_rates)
2549 rate = elems->ext_supp_rates
2550 [i - elems->supp_rates_len];
2551 own_rate = 5 * (rate & 0x7f);
2552 for (j = 0; j < num_rates; j++)
2553 if (bitrates[j].bitrate == own_rate)
2554 supp_rates |= BIT(j);
2559 static u64 ieee80211_sta_get_mandatory_rates(struct ieee80211_local *local,
2560 enum ieee80211_band band)
2562 struct ieee80211_supported_band *sband;
2563 struct ieee80211_rate *bitrates;
2564 u64 mandatory_rates;
2565 enum ieee80211_rate_flags mandatory_flag;
2568 sband = local->hw.wiphy->bands[band];
2571 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2574 if (band == IEEE80211_BAND_2GHZ)
2575 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
2577 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
2579 bitrates = sband->bitrates;
2580 mandatory_rates = 0;
2581 for (i = 0; i < sband->n_bitrates; i++)
2582 if (bitrates[i].flags & mandatory_flag)
2583 mandatory_rates |= BIT(i);
2584 return mandatory_rates;
2587 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2588 struct ieee80211_mgmt *mgmt,
2590 struct ieee80211_rx_status *rx_status,
2591 struct ieee802_11_elems *elems)
2593 struct ieee80211_local *local = sdata->local;
2595 struct ieee80211_sta_bss *bss;
2596 struct sta_info *sta;
2597 struct ieee80211_channel *channel;
2598 u64 beacon_timestamp, rx_timestamp;
2600 bool beacon = ieee80211_is_beacon(mgmt->frame_control);
2601 enum ieee80211_band band = rx_status->band;
2602 DECLARE_MAC_BUF(mac);
2603 DECLARE_MAC_BUF(mac2);
2605 beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2607 if (ieee80211_vif_is_mesh(&sdata->vif) && elems->mesh_id &&
2608 elems->mesh_config && mesh_matches_local(elems, sdata)) {
2609 supp_rates = ieee80211_sta_get_rates(local, elems, band);
2611 mesh_neighbour_update(mgmt->sa, supp_rates, sdata,
2612 mesh_peer_accepts_plinks(elems));
2617 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems->supp_rates &&
2618 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
2620 supp_rates = ieee80211_sta_get_rates(local, elems, band);
2622 sta = sta_info_get(local, mgmt->sa);
2626 prev_rates = sta->supp_rates[band];
2627 /* make sure mandatory rates are always added */
2628 sta->supp_rates[band] = supp_rates |
2629 ieee80211_sta_get_mandatory_rates(local, band);
2631 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2632 if (sta->supp_rates[band] != prev_rates)
2633 printk(KERN_DEBUG "%s: updated supp_rates set "
2634 "for %s based on beacon info (0x%llx | "
2635 "0x%llx -> 0x%llx)\n",
2636 sdata->dev->name, print_mac(mac, sta->addr),
2637 (unsigned long long) prev_rates,
2638 (unsigned long long) supp_rates,
2639 (unsigned long long) sta->supp_rates[band]);
2642 ieee80211_ibss_add_sta(sdata, NULL, mgmt->bssid,
2643 mgmt->sa, supp_rates);
2649 if (elems->ds_params && elems->ds_params_len == 1)
2650 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
2652 freq = rx_status->freq;
2654 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2656 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2659 #ifdef CONFIG_MAC80211_MESH
2660 if (elems->mesh_config)
2661 bss = ieee80211_rx_mesh_bss_get(local, elems->mesh_id,
2662 elems->mesh_id_len, elems->mesh_config, freq);
2665 bss = ieee80211_rx_bss_get(local, mgmt->bssid, freq,
2666 elems->ssid, elems->ssid_len);
2668 #ifdef CONFIG_MAC80211_MESH
2669 if (elems->mesh_config)
2670 bss = ieee80211_rx_mesh_bss_add(local, elems->mesh_id,
2671 elems->mesh_id_len, elems->mesh_config,
2672 elems->mesh_config_len, freq);
2675 bss = ieee80211_rx_bss_add(sdata, mgmt->bssid, freq,
2676 elems->ssid, elems->ssid_len);
2681 /* TODO: order by RSSI? */
2682 spin_lock_bh(&local->sta_bss_lock);
2683 list_move_tail(&bss->list, &local->sta_bss_list);
2684 spin_unlock_bh(&local->sta_bss_lock);
2688 /* save the ERP value so that it is available at association time */
2689 if (elems->erp_info && elems->erp_info_len >= 1) {
2690 bss->erp_value = elems->erp_info[0];
2691 bss->has_erp_value = 1;
2694 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2695 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2698 struct ieee80211_tim_ie *tim_ie =
2699 (struct ieee80211_tim_ie *)elems->tim;
2700 bss->dtim_period = tim_ie->dtim_period;
2703 /* set default value for buggy APs */
2704 if (!elems->tim || bss->dtim_period == 0)
2705 bss->dtim_period = 1;
2707 bss->supp_rates_len = 0;
2708 if (elems->supp_rates) {
2709 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2710 if (clen > elems->supp_rates_len)
2711 clen = elems->supp_rates_len;
2712 memcpy(&bss->supp_rates[bss->supp_rates_len], elems->supp_rates,
2714 bss->supp_rates_len += clen;
2716 if (elems->ext_supp_rates) {
2717 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2718 if (clen > elems->ext_supp_rates_len)
2719 clen = elems->ext_supp_rates_len;
2720 memcpy(&bss->supp_rates[bss->supp_rates_len],
2721 elems->ext_supp_rates, clen);
2722 bss->supp_rates_len += clen;
2727 bss->timestamp = beacon_timestamp;
2728 bss->last_update = jiffies;
2729 bss->signal = rx_status->signal;
2730 bss->noise = rx_status->noise;
2731 bss->qual = rx_status->qual;
2733 bss->last_probe_resp = jiffies;
2735 * In STA mode, the remaining parameters should not be overridden
2736 * by beacons because they're not necessarily accurate there.
2738 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2739 bss->last_probe_resp && beacon) {
2740 ieee80211_rx_bss_put(local, bss);
2744 if (bss->ies == NULL || bss->ies_len < elems->total_len) {
2746 bss->ies = kmalloc(elems->total_len, GFP_ATOMIC);
2749 memcpy(bss->ies, elems->ie_start, elems->total_len);
2750 bss->ies_len = elems->total_len;
2754 bss->wmm_used = elems->wmm_param || elems->wmm_info;
2756 /* check if we need to merge IBSS */
2757 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2758 !local->sta_sw_scanning && !local->sta_hw_scanning &&
2759 bss->capability & WLAN_CAPABILITY_IBSS &&
2760 bss->freq == local->oper_channel->center_freq &&
2761 elems->ssid_len == sdata->u.sta.ssid_len &&
2762 memcmp(elems->ssid, sdata->u.sta.ssid,
2763 sdata->u.sta.ssid_len) == 0) {
2764 if (rx_status->flag & RX_FLAG_TSFT) {
2765 /* in order for correct IBSS merging we need mactime
2767 * since mactime is defined as the time the first data
2768 * symbol of the frame hits the PHY, and the timestamp
2769 * of the beacon is defined as "the time that the data
2770 * symbol containing the first bit of the timestamp is
2771 * transmitted to the PHY plus the transmitting STA’s
2772 * delays through its local PHY from the MAC-PHY
2773 * interface to its interface with the WM"
2774 * (802.11 11.1.2) - equals the time this bit arrives at
2775 * the receiver - we have to take into account the
2776 * offset between the two.
2777 * e.g: at 1 MBit that means mactime is 192 usec earlier
2778 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2780 int rate = local->hw.wiphy->bands[band]->
2781 bitrates[rx_status->rate_idx].bitrate;
2782 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2783 } else if (local && local->ops && local->ops->get_tsf)
2784 /* second best option: get current TSF */
2785 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2787 /* can't merge without knowing the TSF */
2788 rx_timestamp = -1LLU;
2789 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2790 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2791 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2792 print_mac(mac, mgmt->sa),
2793 print_mac(mac2, mgmt->bssid),
2794 (unsigned long long)rx_timestamp,
2795 (unsigned long long)beacon_timestamp,
2796 (unsigned long long)(rx_timestamp - beacon_timestamp),
2798 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2799 if (beacon_timestamp > rx_timestamp) {
2800 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2801 printk(KERN_DEBUG "%s: beacon TSF higher than "
2802 "local TSF - IBSS merge with BSSID %s\n",
2803 sdata->dev->name, print_mac(mac, mgmt->bssid));
2805 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
2806 ieee80211_ibss_add_sta(sdata, NULL,
2807 mgmt->bssid, mgmt->sa,
2812 ieee80211_rx_bss_put(local, bss);
2816 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2817 struct ieee80211_mgmt *mgmt,
2819 struct ieee80211_rx_status *rx_status)
2822 struct ieee802_11_elems elems;
2823 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2825 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
2826 return; /* ignore ProbeResp to foreign address */
2828 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2832 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2835 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2837 /* direct probe may be part of the association flow */
2838 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
2840 printk(KERN_DEBUG "%s direct probe responded\n",
2842 ieee80211_authenticate(sdata, ifsta);
2847 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2848 struct ieee80211_mgmt *mgmt,
2850 struct ieee80211_rx_status *rx_status)
2852 struct ieee80211_if_sta *ifsta;
2854 struct ieee802_11_elems elems;
2855 struct ieee80211_local *local = sdata->local;
2856 struct ieee80211_conf *conf = &local->hw.conf;
2859 /* Process beacon from the current BSS */
2860 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2864 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2866 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2868 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2870 ifsta = &sdata->u.sta;
2872 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2873 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2876 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
2877 elems.wmm_param_len);
2879 /* Do not send changes to driver if we are scanning. This removes
2880 * requirement that driver's bss_info_changed function needs to be
2882 if (local->sta_sw_scanning || local->sta_hw_scanning)
2885 if (elems.erp_info && elems.erp_info_len >= 1)
2886 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2888 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
2889 changed |= ieee80211_handle_protect_preamb(sdata, false,
2890 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
2893 if (elems.ht_cap_elem && elems.ht_info_elem &&
2894 elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2895 struct ieee80211_ht_bss_info bss_info;
2897 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2898 (struct ieee80211_ht_addt_info *)
2899 elems.ht_info_elem, &bss_info);
2900 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2904 ieee80211_bss_info_change_notify(sdata, changed);
2908 static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
2909 struct ieee80211_if_sta *ifsta,
2910 struct ieee80211_mgmt *mgmt,
2912 struct ieee80211_rx_status *rx_status)
2914 struct ieee80211_local *local = sdata->local;
2916 struct sk_buff *skb;
2917 struct ieee80211_mgmt *resp;
2919 DECLARE_MAC_BUF(mac);
2920 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2921 DECLARE_MAC_BUF(mac2);
2922 DECLARE_MAC_BUF(mac3);
2925 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2926 ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
2927 len < 24 + 2 || !ifsta->probe_resp)
2930 if (local->ops->tx_last_beacon)
2931 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2935 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2936 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2937 "%s (tx_last_beacon=%d)\n",
2938 sdata->dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2939 print_mac(mac3, mgmt->bssid), tx_last_beacon);
2940 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2942 if (!tx_last_beacon)
2945 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2946 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2949 end = ((u8 *) mgmt) + len;
2950 pos = mgmt->u.probe_req.variable;
2951 if (pos[0] != WLAN_EID_SSID ||
2952 pos + 2 + pos[1] > end) {
2953 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2954 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2956 sdata->dev->name, print_mac(mac, mgmt->sa));
2961 (pos[1] != ifsta->ssid_len ||
2962 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2963 /* Ignore ProbeReq for foreign SSID */
2967 /* Reply with ProbeResp */
2968 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
2972 resp = (struct ieee80211_mgmt *) skb->data;
2973 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2974 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2975 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2976 sdata->dev->name, print_mac(mac, resp->da));
2977 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2978 ieee80211_sta_tx(sdata, skb, 0);
2981 static void ieee80211_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
2982 struct ieee80211_if_sta *ifsta,
2983 struct ieee80211_mgmt *mgmt,
2985 struct ieee80211_rx_status *rx_status)
2987 struct ieee80211_local *local = sdata->local;
2989 if (len < IEEE80211_MIN_ACTION_SIZE)
2992 switch (mgmt->u.action.category) {
2993 case WLAN_CATEGORY_SPECTRUM_MGMT:
2994 if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ)
2996 switch (mgmt->u.action.u.chan_switch.action_code) {
2997 case WLAN_ACTION_SPCT_MSR_REQ:
2998 if (len < (IEEE80211_MIN_ACTION_SIZE +
2999 sizeof(mgmt->u.action.u.measurement)))
3001 ieee80211_sta_process_measurement_req(sdata, mgmt, len);
3005 case WLAN_CATEGORY_BACK:
3006 switch (mgmt->u.action.u.addba_req.action_code) {
3007 case WLAN_ACTION_ADDBA_REQ:
3008 if (len < (IEEE80211_MIN_ACTION_SIZE +
3009 sizeof(mgmt->u.action.u.addba_req)))
3011 ieee80211_sta_process_addba_request(local, mgmt, len);
3013 case WLAN_ACTION_ADDBA_RESP:
3014 if (len < (IEEE80211_MIN_ACTION_SIZE +
3015 sizeof(mgmt->u.action.u.addba_resp)))
3017 ieee80211_sta_process_addba_resp(local, mgmt, len);
3019 case WLAN_ACTION_DELBA:
3020 if (len < (IEEE80211_MIN_ACTION_SIZE +
3021 sizeof(mgmt->u.action.u.delba)))
3023 ieee80211_sta_process_delba(sdata, mgmt, len);
3027 case PLINK_CATEGORY:
3028 if (ieee80211_vif_is_mesh(&sdata->vif))
3029 mesh_rx_plink_frame(sdata, mgmt, len, rx_status);
3031 case MESH_PATH_SEL_CATEGORY:
3032 if (ieee80211_vif_is_mesh(&sdata->vif))
3033 mesh_rx_path_sel_frame(sdata, mgmt, len);
3038 void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
3039 struct ieee80211_rx_status *rx_status)
3041 struct ieee80211_local *local = sdata->local;
3042 struct ieee80211_if_sta *ifsta;
3043 struct ieee80211_mgmt *mgmt;
3049 ifsta = &sdata->u.sta;
3051 mgmt = (struct ieee80211_mgmt *) skb->data;
3052 fc = le16_to_cpu(mgmt->frame_control);
3054 switch (fc & IEEE80211_FCTL_STYPE) {
3055 case IEEE80211_STYPE_PROBE_REQ:
3056 case IEEE80211_STYPE_PROBE_RESP:
3057 case IEEE80211_STYPE_BEACON:
3058 case IEEE80211_STYPE_ACTION:
3059 memcpy(skb->cb, rx_status, sizeof(*rx_status));
3060 case IEEE80211_STYPE_AUTH:
3061 case IEEE80211_STYPE_ASSOC_RESP:
3062 case IEEE80211_STYPE_REASSOC_RESP:
3063 case IEEE80211_STYPE_DEAUTH:
3064 case IEEE80211_STYPE_DISASSOC:
3065 skb_queue_tail(&ifsta->skb_queue, skb);
3066 queue_work(local->hw.workqueue, &ifsta->work);
3074 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3075 struct sk_buff *skb)
3077 struct ieee80211_rx_status *rx_status;
3078 struct ieee80211_if_sta *ifsta;
3079 struct ieee80211_mgmt *mgmt;
3082 ifsta = &sdata->u.sta;
3084 rx_status = (struct ieee80211_rx_status *) skb->cb;
3085 mgmt = (struct ieee80211_mgmt *) skb->data;
3086 fc = le16_to_cpu(mgmt->frame_control);
3088 switch (fc & IEEE80211_FCTL_STYPE) {
3089 case IEEE80211_STYPE_PROBE_REQ:
3090 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len,
3093 case IEEE80211_STYPE_PROBE_RESP:
3094 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
3096 case IEEE80211_STYPE_BEACON:
3097 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3099 case IEEE80211_STYPE_AUTH:
3100 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
3102 case IEEE80211_STYPE_ASSOC_RESP:
3103 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
3105 case IEEE80211_STYPE_REASSOC_RESP:
3106 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
3108 case IEEE80211_STYPE_DEAUTH:
3109 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
3111 case IEEE80211_STYPE_DISASSOC:
3112 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
3114 case IEEE80211_STYPE_ACTION:
3115 ieee80211_rx_mgmt_action(sdata, ifsta, mgmt, skb->len, rx_status);
3124 ieee80211_sta_rx_scan(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
3125 struct ieee80211_rx_status *rx_status)
3127 struct ieee80211_mgmt *mgmt;
3131 return RX_DROP_UNUSABLE;
3133 mgmt = (struct ieee80211_mgmt *) skb->data;
3134 fc = mgmt->frame_control;
3136 if (ieee80211_is_ctl(fc))
3140 return RX_DROP_MONITOR;
3142 if (ieee80211_is_probe_resp(fc)) {
3143 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
3148 if (ieee80211_is_beacon(fc)) {
3149 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3158 static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
3160 struct ieee80211_local *local = sdata->local;
3162 struct sta_info *sta;
3166 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3167 if (sta->sdata == sdata &&
3168 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3181 static void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, unsigned long exp_time)
3183 struct ieee80211_local *local = sdata->local;
3184 struct sta_info *sta, *tmp;
3185 LIST_HEAD(tmp_list);
3186 DECLARE_MAC_BUF(mac);
3187 unsigned long flags;
3189 spin_lock_irqsave(&local->sta_lock, flags);
3190 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
3191 if (time_after(jiffies, sta->last_rx + exp_time)) {
3192 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3193 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
3194 sdata->dev->name, print_mac(mac, sta->addr));
3196 __sta_info_unlink(&sta);
3198 list_add(&sta->list, &tmp_list);
3200 spin_unlock_irqrestore(&local->sta_lock, flags);
3202 list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3203 sta_info_destroy(sta);
3207 static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
3208 struct ieee80211_if_sta *ifsta)
3210 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3212 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
3213 if (ieee80211_sta_active_ibss(sdata))
3216 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3217 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
3218 ieee80211_sta_req_scan(sdata, ifsta->ssid, ifsta->ssid_len);
3222 #ifdef CONFIG_MAC80211_MESH
3223 static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata,
3224 struct ieee80211_if_sta *ifsta)
3228 ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3229 mesh_path_expire(sdata);
3231 free_plinks = mesh_plink_availables(sdata);
3232 if (free_plinks != sdata->u.sta.accepting_plinks)
3233 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
3235 mod_timer(&ifsta->timer, jiffies +
3236 IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3240 void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
3242 struct ieee80211_if_sta *ifsta;
3243 ifsta = &sdata->u.sta;
3244 ifsta->state = IEEE80211_STA_MLME_MESH_UP;
3245 ieee80211_sta_timer((unsigned long)sdata);
3246 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
3251 void ieee80211_sta_timer(unsigned long data)
3253 struct ieee80211_sub_if_data *sdata =
3254 (struct ieee80211_sub_if_data *) data;
3255 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3256 struct ieee80211_local *local = sdata->local;
3258 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3259 queue_work(local->hw.workqueue, &ifsta->work);
3262 void ieee80211_sta_work(struct work_struct *work)
3264 struct ieee80211_sub_if_data *sdata =
3265 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3266 struct ieee80211_local *local = sdata->local;
3267 struct ieee80211_if_sta *ifsta;
3268 struct sk_buff *skb;
3270 if (!netif_running(sdata->dev))
3273 if (local->sta_sw_scanning || local->sta_hw_scanning)
3276 if (WARN_ON(sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3277 sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3278 sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT))
3280 ifsta = &sdata->u.sta;
3282 while ((skb = skb_dequeue(&ifsta->skb_queue)))
3283 ieee80211_sta_rx_queued_mgmt(sdata, skb);
3285 #ifdef CONFIG_MAC80211_MESH
3286 if (ifsta->preq_queue_len &&
3288 ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3289 mesh_path_start_discovery(sdata);
3292 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
3293 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
3294 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
3295 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3296 if (ifsta->scan_ssid_len)
3297 ieee80211_sta_start_scan(sdata, ifsta->scan_ssid, ifsta->scan_ssid_len);
3299 ieee80211_sta_start_scan(sdata, NULL, 0);
3303 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3304 if (ieee80211_sta_config_auth(sdata, ifsta))
3306 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3307 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3310 switch (ifsta->state) {
3311 case IEEE80211_STA_MLME_DISABLED:
3313 case IEEE80211_STA_MLME_DIRECT_PROBE:
3314 ieee80211_direct_probe(sdata, ifsta);
3316 case IEEE80211_STA_MLME_AUTHENTICATE:
3317 ieee80211_authenticate(sdata, ifsta);
3319 case IEEE80211_STA_MLME_ASSOCIATE:
3320 ieee80211_associate(sdata, ifsta);
3322 case IEEE80211_STA_MLME_ASSOCIATED:
3323 ieee80211_associated(sdata, ifsta);
3325 case IEEE80211_STA_MLME_IBSS_SEARCH:
3326 ieee80211_sta_find_ibss(sdata, ifsta);
3328 case IEEE80211_STA_MLME_IBSS_JOINED:
3329 ieee80211_sta_merge_ibss(sdata, ifsta);
3331 #ifdef CONFIG_MAC80211_MESH
3332 case IEEE80211_STA_MLME_MESH_UP:
3333 ieee80211_mesh_housekeeping(sdata, ifsta);
3341 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
3342 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3343 "mixed-cell disabled - disassociate\n", sdata->dev->name);
3345 ieee80211_send_disassoc(sdata, ifsta, WLAN_REASON_UNSPECIFIED);
3346 ieee80211_set_disassoc(sdata, ifsta, 0);
3351 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
3352 struct ieee80211_if_sta *ifsta)
3354 struct ieee80211_local *local = sdata->local;
3356 if (local->ops->reset_tsf) {
3357 /* Reset own TSF to allow time synchronization work. */
3358 local->ops->reset_tsf(local_to_hw(local));
3361 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3364 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3365 ifsta->auth_alg = WLAN_AUTH_OPEN;
3366 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3367 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3368 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3369 ifsta->auth_alg = WLAN_AUTH_LEAP;
3371 ifsta->auth_alg = WLAN_AUTH_OPEN;
3372 ifsta->auth_transaction = -1;
3373 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3374 ifsta->assoc_scan_tries = 0;
3375 ifsta->direct_probe_tries = 0;
3376 ifsta->auth_tries = 0;
3377 ifsta->assoc_tries = 0;
3378 netif_carrier_off(sdata->dev);
3382 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
3383 struct ieee80211_if_sta *ifsta)
3385 struct ieee80211_local *local = sdata->local;
3387 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3390 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3391 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3392 (ifsta->flags & (IEEE80211_STA_SSID_SET |
3393 IEEE80211_STA_AUTO_SSID_SEL))) {
3394 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3395 queue_work(local->hw.workqueue, &ifsta->work);
3399 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3400 const char *ssid, int ssid_len)
3402 int tmp, hidden_ssid;
3404 if (ssid_len == ifsta->ssid_len &&
3405 !memcmp(ifsta->ssid, ssid, ssid_len))
3408 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
3414 if (ssid[tmp] != '\0') {
3420 if (hidden_ssid && ifsta->ssid_len == ssid_len)
3423 if (ssid_len == 1 && ssid[0] == ' ')
3429 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
3430 struct ieee80211_if_sta *ifsta)
3432 struct ieee80211_local *local = sdata->local;
3433 struct ieee80211_sta_bss *bss, *selected = NULL;
3434 int top_rssi = 0, freq;
3436 spin_lock_bh(&local->sta_bss_lock);
3437 freq = local->oper_channel->center_freq;
3438 list_for_each_entry(bss, &local->sta_bss_list, list) {
3439 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3442 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3443 IEEE80211_STA_AUTO_BSSID_SEL |
3444 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
3445 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3446 !!sdata->default_key))
3449 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3453 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3454 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3457 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3458 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3461 if (!selected || top_rssi < bss->signal) {
3463 top_rssi = bss->signal;
3467 atomic_inc(&selected->users);
3468 spin_unlock_bh(&local->sta_bss_lock);
3471 ieee80211_set_freq(sdata, selected->freq);
3472 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3473 ieee80211_sta_set_ssid(sdata, selected->ssid,
3474 selected->ssid_len);
3475 ieee80211_sta_set_bssid(sdata, selected->bssid);
3476 ieee80211_sta_def_wmm_params(sdata, selected, 0);
3478 /* Send out direct probe if no probe resp was received or
3479 * the one we have is outdated
3481 if (!selected->last_probe_resp ||
3482 time_after(jiffies, selected->last_probe_resp
3483 + IEEE80211_SCAN_RESULT_EXPIRE))
3484 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
3486 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
3488 ieee80211_rx_bss_put(local, selected);
3489 ieee80211_sta_reset_auth(sdata, ifsta);
3492 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
3493 ifsta->assoc_scan_tries++;
3494 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3495 ieee80211_sta_start_scan(sdata, NULL, 0);
3497 ieee80211_sta_start_scan(sdata, ifsta->ssid,
3499 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
3500 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3502 ifsta->state = IEEE80211_STA_MLME_DISABLED;
3508 static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
3509 struct ieee80211_if_sta *ifsta)
3511 struct ieee80211_local *local = sdata->local;
3512 struct ieee80211_sta_bss *bss;
3513 struct ieee80211_supported_band *sband;
3514 u8 bssid[ETH_ALEN], *pos;
3517 DECLARE_MAC_BUF(mac);
3520 /* Easier testing, use fixed BSSID. */
3521 memset(bssid, 0xfe, ETH_ALEN);
3523 /* Generate random, not broadcast, locally administered BSSID. Mix in
3524 * own MAC address to make sure that devices that do not have proper
3525 * random number generator get different BSSID. */
3526 get_random_bytes(bssid, ETH_ALEN);
3527 for (i = 0; i < ETH_ALEN; i++)
3528 bssid[i] ^= sdata->dev->dev_addr[i];
3533 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3534 sdata->dev->name, print_mac(mac, bssid));
3536 bss = ieee80211_rx_bss_add(sdata, bssid,
3537 local->hw.conf.channel->center_freq,
3538 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3542 bss->band = local->hw.conf.channel->band;
3543 sband = local->hw.wiphy->bands[bss->band];
3545 if (local->hw.conf.beacon_int == 0)
3546 local->hw.conf.beacon_int = 100;
3547 bss->beacon_int = local->hw.conf.beacon_int;
3548 bss->last_update = jiffies;
3549 bss->capability = WLAN_CAPABILITY_IBSS;
3551 if (sdata->default_key)
3552 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3554 sdata->drop_unencrypted = 0;
3556 bss->supp_rates_len = sband->n_bitrates;
3557 pos = bss->supp_rates;
3558 for (i = 0; i < sband->n_bitrates; i++) {
3559 int rate = sband->bitrates[i].bitrate;
3560 *pos++ = (u8) (rate / 5);
3563 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3564 ieee80211_rx_bss_put(local, bss);
3569 static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
3570 struct ieee80211_if_sta *ifsta)
3572 struct ieee80211_local *local = sdata->local;
3573 struct ieee80211_sta_bss *bss;
3577 DECLARE_MAC_BUF(mac);
3578 DECLARE_MAC_BUF(mac2);
3580 if (ifsta->ssid_len == 0)
3583 active_ibss = ieee80211_sta_active_ibss(sdata);
3584 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3585 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3586 sdata->dev->name, active_ibss);
3587 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3588 spin_lock_bh(&local->sta_bss_lock);
3589 list_for_each_entry(bss, &local->sta_bss_list, list) {
3590 if (ifsta->ssid_len != bss->ssid_len ||
3591 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3592 || !(bss->capability & WLAN_CAPABILITY_IBSS))
3594 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3595 printk(KERN_DEBUG " bssid=%s found\n",
3596 print_mac(mac, bss->bssid));
3597 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3598 memcpy(bssid, bss->bssid, ETH_ALEN);
3600 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3603 spin_unlock_bh(&local->sta_bss_lock);
3605 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3607 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
3608 "%s\n", print_mac(mac, bssid),
3609 print_mac(mac2, ifsta->bssid));
3610 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3612 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3616 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
3617 search_freq = bss->freq;
3619 search_freq = local->hw.conf.channel->center_freq;
3621 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
3622 ifsta->ssid, ifsta->ssid_len);
3626 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3627 " based on configured SSID\n",
3628 sdata->dev->name, print_mac(mac, bssid));
3629 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3630 ieee80211_rx_bss_put(local, bss);
3635 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3636 printk(KERN_DEBUG " did not try to join ibss\n");
3637 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3639 /* Selected IBSS not found in current scan results - try to scan */
3640 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
3641 !ieee80211_sta_active_ibss(sdata)) {
3642 mod_timer(&ifsta->timer, jiffies +
3643 IEEE80211_IBSS_MERGE_INTERVAL);
3644 } else if (time_after(jiffies, local->last_scan_completed +
3645 IEEE80211_SCAN_INTERVAL)) {
3646 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3647 "join\n", sdata->dev->name);
3648 return ieee80211_sta_req_scan(sdata, ifsta->ssid,
3650 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
3651 int interval = IEEE80211_SCAN_INTERVAL;
3653 if (time_after(jiffies, ifsta->ibss_join_req +
3654 IEEE80211_IBSS_JOIN_TIMEOUT)) {
3655 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3656 (!(local->oper_channel->flags &
3657 IEEE80211_CHAN_NO_IBSS)))
3658 return ieee80211_sta_create_ibss(sdata, ifsta);
3659 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3660 printk(KERN_DEBUG "%s: IBSS not allowed on"
3661 " %d MHz\n", sdata->dev->name,
3662 local->hw.conf.channel->center_freq);
3665 /* No IBSS found - decrease scan interval and continue
3667 interval = IEEE80211_SCAN_INTERVAL_SLOW;
3670 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
3671 mod_timer(&ifsta->timer, jiffies + interval);
3679 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
3681 struct ieee80211_if_sta *ifsta;
3684 if (len > IEEE80211_MAX_SSID_LEN)
3687 ifsta = &sdata->u.sta;
3689 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
3690 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
3691 memcpy(ifsta->ssid, ssid, len);
3692 ifsta->ssid_len = len;
3693 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3697 * Hack! MLME code needs to be cleaned up to have different
3698 * entry points for configuration and internal selection change
3700 if (netif_running(sdata->dev))
3701 res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID);
3703 printk(KERN_DEBUG "%s: Failed to config new SSID to "
3704 "the low-level driver\n", sdata->dev->name);
3710 ifsta->flags |= IEEE80211_STA_SSID_SET;
3712 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3714 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3715 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3716 ifsta->ibss_join_req = jiffies;
3717 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
3718 return ieee80211_sta_find_ibss(sdata, ifsta);
3725 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
3727 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3728 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3729 *len = ifsta->ssid_len;
3734 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
3736 struct ieee80211_if_sta *ifsta;
3739 ifsta = &sdata->u.sta;
3741 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3742 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3745 * Hack! See also ieee80211_sta_set_ssid.
3747 if (netif_running(sdata->dev))
3748 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
3750 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3751 "the low-level driver\n", sdata->dev->name);
3756 if (is_valid_ether_addr(bssid))
3757 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3759 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3765 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3766 struct ieee80211_sub_if_data *sdata,
3769 struct sk_buff *skb;
3770 struct ieee80211_hdr *nullfunc;
3773 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3775 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3776 "frame\n", sdata->dev->name);
3779 skb_reserve(skb, local->hw.extra_tx_headroom);
3781 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3782 memset(nullfunc, 0, 24);
3783 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3784 IEEE80211_FCTL_TODS);
3786 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
3787 nullfunc->frame_control = fc;
3788 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3789 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3790 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3792 ieee80211_sta_tx(sdata, skb, 0);
3796 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3798 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3799 ieee80211_vif_is_mesh(&sdata->vif))
3800 ieee80211_sta_timer((unsigned long)sdata);
3803 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3805 struct ieee80211_local *local = hw_to_local(hw);
3806 struct net_device *dev = local->scan_dev;
3807 struct ieee80211_sub_if_data *sdata;
3808 union iwreq_data wrqu;
3810 local->last_scan_completed = jiffies;
3811 memset(&wrqu, 0, sizeof(wrqu));
3812 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3814 if (local->sta_hw_scanning) {
3815 local->sta_hw_scanning = 0;
3816 if (ieee80211_hw_config(local))
3817 printk(KERN_DEBUG "%s: failed to restore operational "
3818 "channel after scan\n", dev->name);
3819 /* Restart STA timer for HW scan case */
3821 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3822 ieee80211_restart_sta_timer(sdata);
3828 local->sta_sw_scanning = 0;
3829 if (ieee80211_hw_config(local))
3830 printk(KERN_DEBUG "%s: failed to restore operational "
3831 "channel after scan\n", dev->name);
3834 netif_tx_lock_bh(local->mdev);
3835 netif_addr_lock(local->mdev);
3836 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3837 local->ops->configure_filter(local_to_hw(local),
3838 FIF_BCN_PRBRESP_PROMISC,
3839 &local->filter_flags,
3840 local->mdev->mc_count,
3841 local->mdev->mc_list);
3843 netif_addr_unlock(local->mdev);
3844 netif_tx_unlock_bh(local->mdev);
3847 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3848 /* Tell AP we're back */
3849 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3850 sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3851 ieee80211_send_nullfunc(local, sdata, 0);
3853 ieee80211_restart_sta_timer(sdata);
3855 netif_wake_queue(sdata->dev);
3860 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3861 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3862 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3863 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3864 (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) &&
3865 !ieee80211_sta_active_ibss(sdata)))
3866 ieee80211_sta_find_ibss(sdata, ifsta);
3869 EXPORT_SYMBOL(ieee80211_scan_completed);
3871 void ieee80211_sta_scan_work(struct work_struct *work)
3873 struct ieee80211_local *local =
3874 container_of(work, struct ieee80211_local, scan_work.work);
3875 struct net_device *dev = local->scan_dev;
3876 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3877 struct ieee80211_supported_band *sband;
3878 struct ieee80211_channel *chan;
3880 unsigned long next_delay = 0;
3882 if (!local->sta_sw_scanning)
3885 switch (local->scan_state) {
3886 case SCAN_SET_CHANNEL:
3888 * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3889 * after we successfully scanned the last channel of the last
3890 * band (and the last band is supported by the hw)
3892 if (local->scan_band < IEEE80211_NUM_BANDS)
3893 sband = local->hw.wiphy->bands[local->scan_band];
3898 * If we are at an unsupported band and have more bands
3899 * left to scan, advance to the next supported one.
3901 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
3903 sband = local->hw.wiphy->bands[local->scan_band];
3904 local->scan_channel_idx = 0;
3907 /* if no more bands/channels left, complete scan */
3908 if (!sband || local->scan_channel_idx >= sband->n_channels) {
3909 ieee80211_scan_completed(local_to_hw(local));
3913 chan = &sband->channels[local->scan_channel_idx];
3915 if (chan->flags & IEEE80211_CHAN_DISABLED ||
3916 (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3917 chan->flags & IEEE80211_CHAN_NO_IBSS))
3921 local->scan_channel = chan;
3922 if (ieee80211_hw_config(local)) {
3923 printk(KERN_DEBUG "%s: failed to set freq to "
3924 "%d MHz for scan\n", dev->name,
3930 /* advance state machine to next channel/band */
3931 local->scan_channel_idx++;
3932 if (local->scan_channel_idx >= sband->n_channels) {
3934 * scan_band may end up == IEEE80211_NUM_BANDS, but
3935 * we'll catch that case above and complete the scan
3936 * if that is the case.
3939 local->scan_channel_idx = 0;
3945 next_delay = IEEE80211_PROBE_DELAY +
3946 usecs_to_jiffies(local->hw.channel_change_time);
3947 local->scan_state = SCAN_SEND_PROBE;
3949 case SCAN_SEND_PROBE:
3950 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3951 local->scan_state = SCAN_SET_CHANNEL;
3953 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3955 ieee80211_send_probe_req(sdata, NULL, local->scan_ssid,
3956 local->scan_ssid_len);
3957 next_delay = IEEE80211_CHANNEL_TIME;
3961 if (local->sta_sw_scanning)
3962 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3967 static int ieee80211_sta_start_scan(struct ieee80211_sub_if_data *scan_sdata,
3968 u8 *ssid, size_t ssid_len)
3970 struct ieee80211_local *local = scan_sdata->local;
3971 struct ieee80211_sub_if_data *sdata;
3973 if (ssid_len > IEEE80211_MAX_SSID_LEN)
3976 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
3977 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3980 * ScanType: ACTIVE, PASSIVE
3981 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3982 * a Probe frame during active scanning
3984 * MinChannelTime (>= ProbeDelay), in TU
3985 * MaxChannelTime: (>= MinChannelTime), in TU
3988 /* MLME-SCAN.confirm
3990 * ResultCode: SUCCESS, INVALID_PARAMETERS
3993 if (local->sta_sw_scanning || local->sta_hw_scanning) {
3994 if (local->scan_dev == scan_sdata->dev)
3999 if (local->ops->hw_scan) {
4000 int rc = local->ops->hw_scan(local_to_hw(local),
4003 local->sta_hw_scanning = 1;
4004 local->scan_dev = scan_sdata->dev;
4009 local->sta_sw_scanning = 1;
4012 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4013 netif_stop_queue(sdata->dev);
4014 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
4015 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
4016 ieee80211_send_nullfunc(local, sdata, 1);
4021 local->scan_ssid_len = ssid_len;
4022 memcpy(local->scan_ssid, ssid, ssid_len);
4024 local->scan_ssid_len = 0;
4025 local->scan_state = SCAN_SET_CHANNEL;
4026 local->scan_channel_idx = 0;
4027 local->scan_band = IEEE80211_BAND_2GHZ;
4028 local->scan_dev = scan_sdata->dev;
4030 netif_addr_lock_bh(local->mdev);
4031 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
4032 local->ops->configure_filter(local_to_hw(local),
4033 FIF_BCN_PRBRESP_PROMISC,
4034 &local->filter_flags,
4035 local->mdev->mc_count,
4036 local->mdev->mc_list);
4037 netif_addr_unlock_bh(local->mdev);
4039 /* TODO: start scan as soon as all nullfunc frames are ACKed */
4040 queue_delayed_work(local->hw.workqueue, &local->scan_work,
4041 IEEE80211_CHANNEL_TIME);
4047 int ieee80211_sta_req_scan(struct ieee80211_sub_if_data *sdata, u8 *ssid, size_t ssid_len)
4049 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4050 struct ieee80211_local *local = sdata->local;
4052 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4053 return ieee80211_sta_start_scan(sdata, ssid, ssid_len);
4055 if (local->sta_sw_scanning || local->sta_hw_scanning) {
4056 if (local->scan_dev == sdata->dev)
4061 ifsta->scan_ssid_len = ssid_len;
4063 memcpy(ifsta->scan_ssid, ssid, ssid_len);
4064 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
4065 queue_work(local->hw.workqueue, &ifsta->work);
4070 static void ieee80211_sta_add_scan_ies(struct iw_request_info *info,
4071 struct ieee80211_sta_bss *bss,
4072 char **current_ev, char *end_buf)
4074 u8 *pos, *end, *next;
4075 struct iw_event iwe;
4077 if (bss == NULL || bss->ies == NULL)
4081 * If needed, fragment the IEs buffer (at IE boundaries) into short
4082 * enough fragments to fit into IW_GENERIC_IE_MAX octet messages.
4085 end = pos + bss->ies_len;
4087 while (end - pos > IW_GENERIC_IE_MAX) {
4088 next = pos + 2 + pos[1];
4089 while (next + 2 + next[1] - pos < IW_GENERIC_IE_MAX)
4090 next = next + 2 + next[1];
4092 memset(&iwe, 0, sizeof(iwe));
4093 iwe.cmd = IWEVGENIE;
4094 iwe.u.data.length = next - pos;
4095 *current_ev = iwe_stream_add_point(info, *current_ev,
4096 end_buf, &iwe, pos);
4102 memset(&iwe, 0, sizeof(iwe));
4103 iwe.cmd = IWEVGENIE;
4104 iwe.u.data.length = end - pos;
4105 *current_ev = iwe_stream_add_point(info, *current_ev,
4106 end_buf, &iwe, pos);
4112 ieee80211_sta_scan_result(struct ieee80211_local *local,
4113 struct iw_request_info *info,
4114 struct ieee80211_sta_bss *bss,
4115 char *current_ev, char *end_buf)
4117 struct iw_event iwe;
4119 if (time_after(jiffies,
4120 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
4123 memset(&iwe, 0, sizeof(iwe));
4124 iwe.cmd = SIOCGIWAP;
4125 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
4126 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
4127 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4130 memset(&iwe, 0, sizeof(iwe));
4131 iwe.cmd = SIOCGIWESSID;
4132 if (bss_mesh_cfg(bss)) {
4133 iwe.u.data.length = bss_mesh_id_len(bss);
4134 iwe.u.data.flags = 1;
4135 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4136 &iwe, bss_mesh_id(bss));
4138 iwe.u.data.length = bss->ssid_len;
4139 iwe.u.data.flags = 1;
4140 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4144 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
4145 || bss_mesh_cfg(bss)) {
4146 memset(&iwe, 0, sizeof(iwe));
4147 iwe.cmd = SIOCGIWMODE;
4148 if (bss_mesh_cfg(bss))
4149 iwe.u.mode = IW_MODE_MESH;
4150 else if (bss->capability & WLAN_CAPABILITY_ESS)
4151 iwe.u.mode = IW_MODE_MASTER;
4153 iwe.u.mode = IW_MODE_ADHOC;
4154 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
4155 &iwe, IW_EV_UINT_LEN);
4158 memset(&iwe, 0, sizeof(iwe));
4159 iwe.cmd = SIOCGIWFREQ;
4160 iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
4162 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4165 memset(&iwe, 0, sizeof(iwe));
4166 iwe.cmd = SIOCGIWFREQ;
4167 iwe.u.freq.m = bss->freq;
4169 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4171 memset(&iwe, 0, sizeof(iwe));
4173 iwe.u.qual.qual = bss->qual;
4174 iwe.u.qual.level = bss->signal;
4175 iwe.u.qual.noise = bss->noise;
4176 iwe.u.qual.updated = local->wstats_flags;
4177 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4180 memset(&iwe, 0, sizeof(iwe));
4181 iwe.cmd = SIOCGIWENCODE;
4182 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
4183 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4185 iwe.u.data.flags = IW_ENCODE_DISABLED;
4186 iwe.u.data.length = 0;
4187 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4190 ieee80211_sta_add_scan_ies(info, bss, ¤t_ev, end_buf);
4192 if (bss && bss->supp_rates_len > 0) {
4193 /* display all supported rates in readable format */
4194 char *p = current_ev + iwe_stream_lcp_len(info);
4197 memset(&iwe, 0, sizeof(iwe));
4198 iwe.cmd = SIOCGIWRATE;
4199 /* Those two flags are ignored... */
4200 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4202 for (i = 0; i < bss->supp_rates_len; i++) {
4203 iwe.u.bitrate.value = ((bss->supp_rates[i] &
4205 p = iwe_stream_add_value(info, current_ev, p,
4206 end_buf, &iwe, IW_EV_PARAM_LEN);
4213 buf = kmalloc(30, GFP_ATOMIC);
4215 memset(&iwe, 0, sizeof(iwe));
4216 iwe.cmd = IWEVCUSTOM;
4217 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4218 iwe.u.data.length = strlen(buf);
4219 current_ev = iwe_stream_add_point(info, current_ev,
4222 memset(&iwe, 0, sizeof(iwe));
4223 iwe.cmd = IWEVCUSTOM;
4224 sprintf(buf, " Last beacon: %dms ago",
4225 jiffies_to_msecs(jiffies - bss->last_update));
4226 iwe.u.data.length = strlen(buf);
4227 current_ev = iwe_stream_add_point(info, current_ev,
4228 end_buf, &iwe, buf);
4233 if (bss_mesh_cfg(bss)) {
4235 u8 *cfg = bss_mesh_cfg(bss);
4236 buf = kmalloc(50, GFP_ATOMIC);
4238 memset(&iwe, 0, sizeof(iwe));
4239 iwe.cmd = IWEVCUSTOM;
4240 sprintf(buf, "Mesh network (version %d)", cfg[0]);
4241 iwe.u.data.length = strlen(buf);
4242 current_ev = iwe_stream_add_point(info, current_ev,
4245 sprintf(buf, "Path Selection Protocol ID: "
4246 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4248 iwe.u.data.length = strlen(buf);
4249 current_ev = iwe_stream_add_point(info, current_ev,
4252 sprintf(buf, "Path Selection Metric ID: "
4253 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4255 iwe.u.data.length = strlen(buf);
4256 current_ev = iwe_stream_add_point(info, current_ev,
4259 sprintf(buf, "Congestion Control Mode ID: "
4260 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4262 iwe.u.data.length = strlen(buf);
4263 current_ev = iwe_stream_add_point(info, current_ev,
4266 sprintf(buf, "Channel Precedence: "
4267 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4269 iwe.u.data.length = strlen(buf);
4270 current_ev = iwe_stream_add_point(info, current_ev,
4281 int ieee80211_sta_scan_results(struct ieee80211_local *local,
4282 struct iw_request_info *info,
4283 char *buf, size_t len)
4285 char *current_ev = buf;
4286 char *end_buf = buf + len;
4287 struct ieee80211_sta_bss *bss;
4289 spin_lock_bh(&local->sta_bss_lock);
4290 list_for_each_entry(bss, &local->sta_bss_list, list) {
4291 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4292 spin_unlock_bh(&local->sta_bss_lock);
4295 current_ev = ieee80211_sta_scan_result(local, info, bss,
4296 current_ev, end_buf);
4298 spin_unlock_bh(&local->sta_bss_lock);
4299 return current_ev - buf;
4303 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
4305 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4307 kfree(ifsta->extra_ie);
4309 ifsta->extra_ie = NULL;
4310 ifsta->extra_ie_len = 0;
4313 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4314 if (!ifsta->extra_ie) {
4315 ifsta->extra_ie_len = 0;
4318 memcpy(ifsta->extra_ie, ie, len);
4319 ifsta->extra_ie_len = len;
4324 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
4325 struct sk_buff *skb, u8 *bssid,
4326 u8 *addr, u64 supp_rates)
4328 struct ieee80211_local *local = sdata->local;
4329 struct sta_info *sta;
4330 DECLARE_MAC_BUF(mac);
4331 int band = local->hw.conf.channel->band;
4333 /* TODO: Could consider removing the least recently used entry and
4334 * allow new one to be added. */
4335 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4336 if (net_ratelimit()) {
4337 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
4338 "entry %s\n", sdata->dev->name, print_mac(mac, addr));
4343 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
4346 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
4347 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
4348 wiphy_name(local->hw.wiphy), print_mac(mac, addr), sdata->dev->name);
4351 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4355 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
4357 /* make sure mandatory rates are always added */
4358 sta->supp_rates[band] = supp_rates |
4359 ieee80211_sta_get_mandatory_rates(local, band);
4361 rate_control_rate_init(sta, local);
4363 if (sta_info_insert(sta))
4370 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
4372 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4374 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
4375 sdata->dev->name, reason);
4377 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4378 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
4381 ieee80211_send_deauth(sdata, ifsta, reason);
4382 ieee80211_set_disassoc(sdata, ifsta, 1);
4387 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
4389 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4391 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
4392 sdata->dev->name, reason);
4394 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4397 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
4400 ieee80211_send_disassoc(sdata, ifsta, reason);
4401 ieee80211_set_disassoc(sdata, ifsta, 0);
4405 void ieee80211_notify_mac(struct ieee80211_hw *hw,
4406 enum ieee80211_notification_types notif_type)
4408 struct ieee80211_local *local = hw_to_local(hw);
4409 struct ieee80211_sub_if_data *sdata;
4411 switch (notif_type) {
4412 case IEEE80211_NOTIFY_RE_ASSOC:
4414 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4415 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4418 ieee80211_sta_req_auth(sdata, &sdata->u.sta);
4424 EXPORT_SYMBOL(ieee80211_notify_mac);