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_AUTH_TIMEOUT (HZ / 5)
38 #define IEEE80211_AUTH_MAX_TRIES 3
39 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
40 #define IEEE80211_ASSOC_MAX_TRIES 3
41 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
42 #define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
43 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
44 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
45 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
46 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
47 #define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
49 #define IEEE80211_PROBE_DELAY (HZ / 33)
50 #define IEEE80211_CHANNEL_TIME (HZ / 33)
51 #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
52 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
53 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
54 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
55 #define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
57 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
60 #define ERP_INFO_USE_PROTECTION BIT(1)
62 /* mgmt header + 1 byte action code */
63 #define IEEE80211_MIN_ACTION_SIZE (24 + 1)
65 #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
66 #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
67 #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
68 #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
69 #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
71 /* next values represent the buffer size for A-MPDU frame.
72 * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
73 #define IEEE80211_MIN_AMPDU_BUF 0x8
74 #define IEEE80211_MAX_AMPDU_BUF 0x40
76 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
77 u8 *ssid, size_t ssid_len);
78 static struct ieee80211_sta_bss *
79 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
80 u8 *ssid, u8 ssid_len);
81 static void ieee80211_rx_bss_put(struct net_device *dev,
82 struct ieee80211_sta_bss *bss);
83 static int ieee80211_sta_find_ibss(struct net_device *dev,
84 struct ieee80211_if_sta *ifsta);
85 static int ieee80211_sta_wep_configured(struct net_device *dev);
86 static int ieee80211_sta_start_scan(struct net_device *dev,
87 u8 *ssid, size_t ssid_len);
88 static int ieee80211_sta_config_auth(struct net_device *dev,
89 struct ieee80211_if_sta *ifsta);
90 static void sta_rx_agg_session_timer_expired(unsigned long data);
93 void ieee802_11_parse_elems(u8 *start, size_t len,
94 struct ieee802_11_elems *elems)
99 memset(elems, 0, sizeof(*elems));
114 elems->ssid_len = elen;
116 case WLAN_EID_SUPP_RATES:
117 elems->supp_rates = pos;
118 elems->supp_rates_len = elen;
120 case WLAN_EID_FH_PARAMS:
121 elems->fh_params = pos;
122 elems->fh_params_len = elen;
124 case WLAN_EID_DS_PARAMS:
125 elems->ds_params = pos;
126 elems->ds_params_len = elen;
128 case WLAN_EID_CF_PARAMS:
129 elems->cf_params = pos;
130 elems->cf_params_len = elen;
134 elems->tim_len = elen;
136 case WLAN_EID_IBSS_PARAMS:
137 elems->ibss_params = pos;
138 elems->ibss_params_len = elen;
140 case WLAN_EID_CHALLENGE:
141 elems->challenge = pos;
142 elems->challenge_len = elen;
145 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
147 /* Microsoft OUI (00:50:F2) */
149 /* OUI Type 1 - WPA IE */
151 elems->wpa_len = elen;
152 } else if (elen >= 5 && pos[3] == 2) {
154 elems->wmm_info = pos;
155 elems->wmm_info_len = elen;
156 } else if (pos[4] == 1) {
157 elems->wmm_param = pos;
158 elems->wmm_param_len = elen;
165 elems->rsn_len = elen;
167 case WLAN_EID_ERP_INFO:
168 elems->erp_info = pos;
169 elems->erp_info_len = elen;
171 case WLAN_EID_EXT_SUPP_RATES:
172 elems->ext_supp_rates = pos;
173 elems->ext_supp_rates_len = elen;
175 case WLAN_EID_HT_CAPABILITY:
176 elems->ht_cap_elem = pos;
177 elems->ht_cap_elem_len = elen;
179 case WLAN_EID_HT_EXTRA_INFO:
180 elems->ht_info_elem = pos;
181 elems->ht_info_elem_len = elen;
183 case WLAN_EID_MESH_ID:
184 elems->mesh_id = pos;
185 elems->mesh_id_len = elen;
187 case WLAN_EID_MESH_CONFIG:
188 elems->mesh_config = pos;
189 elems->mesh_config_len = elen;
191 case WLAN_EID_PEER_LINK:
192 elems->peer_link = pos;
193 elems->peer_link_len = elen;
197 elems->preq_len = elen;
201 elems->prep_len = elen;
205 elems->perr_len = elen;
207 case WLAN_EID_CHANNEL_SWITCH:
208 elems->ch_switch_elem = pos;
209 elems->ch_switch_elem_len = elen;
212 if (!elems->quiet_elem) {
213 elems->quiet_elem = pos;
214 elems->quiet_elem_len = elen;
216 elems->num_of_quiet_elem++;
218 case WLAN_EID_COUNTRY:
219 elems->country_elem = pos;
220 elems->country_elem_len = elen;
222 case WLAN_EID_PWR_CONSTRAINT:
223 elems->pwr_constr_elem = pos;
224 elems->pwr_constr_elem_len = elen;
236 static int ecw2cw(int ecw)
238 return (1 << ecw) - 1;
242 static void ieee80211_sta_def_wmm_params(struct net_device *dev,
243 struct ieee80211_sta_bss *bss,
246 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
247 struct ieee80211_local *local = sdata->local;
248 int i, have_higher_than_11mbit = 0;
251 /* cf. IEEE 802.11 9.2.12 */
252 for (i = 0; i < bss->supp_rates_len; i++)
253 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
254 have_higher_than_11mbit = 1;
256 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
257 have_higher_than_11mbit)
258 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
260 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
263 if (local->ops->conf_tx) {
264 struct ieee80211_tx_queue_params qparam;
266 memset(&qparam, 0, sizeof(qparam));
270 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
271 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
276 qparam.cw_max = 1023;
279 for (i = 0; i < local_to_hw(local)->queues; i++)
280 local->ops->conf_tx(local_to_hw(local), i, &qparam);
284 static void ieee80211_sta_wmm_params(struct net_device *dev,
285 struct ieee80211_if_sta *ifsta,
286 u8 *wmm_param, size_t wmm_param_len)
288 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
289 struct ieee80211_tx_queue_params params;
294 if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
300 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
302 count = wmm_param[6] & 0x0f;
303 if (count == ifsta->wmm_last_param_set)
305 ifsta->wmm_last_param_set = count;
308 left = wmm_param_len - 8;
310 memset(¶ms, 0, sizeof(params));
312 if (!local->ops->conf_tx)
316 for (; left >= 4; left -= 4, pos += 4) {
317 int aci = (pos[0] >> 5) & 0x03;
318 int acm = (pos[0] >> 4) & 0x01;
325 local->wmm_acm |= BIT(0) | BIT(3);
330 local->wmm_acm |= BIT(4) | BIT(5);
335 local->wmm_acm |= BIT(6) | BIT(7);
341 local->wmm_acm |= BIT(1) | BIT(2);
345 params.aifs = pos[0] & 0x0f;
346 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
347 params.cw_min = ecw2cw(pos[1] & 0x0f);
348 params.txop = pos[2] | (pos[3] << 8);
349 #ifdef CONFIG_MAC80211_DEBUG
350 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
351 "cWmin=%d cWmax=%d txop=%d\n",
352 dev->name, queue, aci, acm, params.aifs, params.cw_min,
353 params.cw_max, params.txop);
355 /* TODO: handle ACM (block TX, fallback to next lowest allowed
357 if (local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) {
358 printk(KERN_DEBUG "%s: failed to set TX queue "
359 "parameters for queue %d\n", dev->name, queue);
364 static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
366 bool use_short_preamble)
368 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
369 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
370 DECLARE_MAC_BUF(mac);
373 if (use_protection != bss_conf->use_cts_prot) {
374 if (net_ratelimit()) {
375 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
378 use_protection ? "enabled" : "disabled",
379 print_mac(mac, ifsta->bssid));
381 bss_conf->use_cts_prot = use_protection;
382 changed |= BSS_CHANGED_ERP_CTS_PROT;
385 if (use_short_preamble != bss_conf->use_short_preamble) {
386 if (net_ratelimit()) {
387 printk(KERN_DEBUG "%s: switched to %s barker preamble"
390 use_short_preamble ? "short" : "long",
391 print_mac(mac, ifsta->bssid));
393 bss_conf->use_short_preamble = use_short_preamble;
394 changed |= BSS_CHANGED_ERP_PREAMBLE;
400 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
403 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
404 bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
406 return ieee80211_handle_protect_preamb(sdata,
407 use_protection, use_short_preamble);
410 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
411 struct ieee80211_sta_bss *bss)
415 if (bss->has_erp_value)
416 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
418 u16 capab = bss->capability;
419 changed |= ieee80211_handle_protect_preamb(sdata, false,
420 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
426 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
427 struct ieee80211_ht_info *ht_info)
433 memset(ht_info, 0, sizeof(*ht_info));
436 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
438 ht_info->ht_supported = 1;
439 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
440 ht_info->ampdu_factor =
441 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
442 ht_info->ampdu_density =
443 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
444 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
446 ht_info->ht_supported = 0;
451 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
452 struct ieee80211_ht_addt_info *ht_add_info_ie,
453 struct ieee80211_ht_bss_info *bss_info)
455 if (bss_info == NULL)
458 memset(bss_info, 0, sizeof(*bss_info));
460 if (ht_add_info_ie) {
462 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
464 bss_info->primary_channel = ht_add_info_ie->control_chan;
465 bss_info->bss_cap = ht_add_info_ie->ht_param;
466 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
472 static void ieee80211_sta_send_associnfo(struct net_device *dev,
473 struct ieee80211_if_sta *ifsta)
478 union iwreq_data wrqu;
480 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
483 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
484 ifsta->assocresp_ies_len), GFP_KERNEL);
488 len = sprintf(buf, "ASSOCINFO(");
489 if (ifsta->assocreq_ies) {
490 len += sprintf(buf + len, "ReqIEs=");
491 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
492 len += sprintf(buf + len, "%02x",
493 ifsta->assocreq_ies[i]);
496 if (ifsta->assocresp_ies) {
497 if (ifsta->assocreq_ies)
498 len += sprintf(buf + len, " ");
499 len += sprintf(buf + len, "RespIEs=");
500 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
501 len += sprintf(buf + len, "%02x",
502 ifsta->assocresp_ies[i]);
505 len += sprintf(buf + len, ")");
507 if (len > IW_CUSTOM_MAX) {
508 len = sprintf(buf, "ASSOCRESPIE=");
509 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
510 len += sprintf(buf + len, "%02x",
511 ifsta->assocresp_ies[i]);
515 memset(&wrqu, 0, sizeof(wrqu));
516 wrqu.data.length = len;
517 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
523 static void ieee80211_set_associated(struct net_device *dev,
524 struct ieee80211_if_sta *ifsta,
527 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
528 struct ieee80211_local *local = sdata->local;
529 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
530 union iwreq_data wrqu;
531 u32 changed = BSS_CHANGED_ASSOC;
534 struct ieee80211_sta_bss *bss;
536 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
538 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
541 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
542 conf->channel->center_freq,
543 ifsta->ssid, ifsta->ssid_len);
545 /* set timing information */
546 sdata->bss_conf.beacon_int = bss->beacon_int;
547 sdata->bss_conf.timestamp = bss->timestamp;
549 changed |= ieee80211_handle_bss_capability(sdata, bss);
551 ieee80211_rx_bss_put(dev, bss);
554 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
555 changed |= BSS_CHANGED_HT;
556 sdata->bss_conf.assoc_ht = 1;
557 sdata->bss_conf.ht_conf = &conf->ht_conf;
558 sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
561 netif_carrier_on(dev);
562 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
563 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
564 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
565 ieee80211_sta_send_associnfo(dev, ifsta);
567 ieee80211_sta_tear_down_BA_sessions(dev, ifsta->bssid);
568 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
569 netif_carrier_off(dev);
570 ieee80211_reset_erp_info(dev);
572 sdata->bss_conf.assoc_ht = 0;
573 sdata->bss_conf.ht_conf = NULL;
574 sdata->bss_conf.ht_bss_conf = NULL;
576 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
578 ifsta->last_probe = jiffies;
579 ieee80211_led_assoc(local, assoc);
581 sdata->bss_conf.assoc = assoc;
582 ieee80211_bss_info_change_notify(sdata, changed);
583 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
584 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
587 static void ieee80211_set_disassoc(struct net_device *dev,
588 struct ieee80211_if_sta *ifsta, int deauth)
591 ifsta->auth_tries = 0;
592 ifsta->assoc_tries = 0;
593 ieee80211_set_associated(dev, ifsta, 0);
596 void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
599 struct ieee80211_sub_if_data *sdata;
600 struct ieee80211_tx_info *info;
602 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
603 skb->dev = sdata->local->mdev;
604 skb_set_mac_header(skb, 0);
605 skb_set_network_header(skb, 0);
606 skb_set_transport_header(skb, 0);
608 info = IEEE80211_SKB_CB(skb);
609 memset(info, 0, sizeof(struct ieee80211_tx_info));
610 info->control.ifindex = sdata->dev->ifindex;
612 info->flags |= IEEE80211_TX_CTL_DO_NOT_ENCRYPT;
618 static void ieee80211_send_auth(struct net_device *dev,
619 struct ieee80211_if_sta *ifsta,
620 int transaction, u8 *extra, size_t extra_len,
623 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
625 struct ieee80211_mgmt *mgmt;
627 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
628 sizeof(*mgmt) + 6 + extra_len);
630 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
631 "frame\n", dev->name);
634 skb_reserve(skb, local->hw.extra_tx_headroom);
636 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
637 memset(mgmt, 0, 24 + 6);
638 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
639 IEEE80211_STYPE_AUTH);
641 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
642 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
643 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
644 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
645 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
646 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
647 ifsta->auth_transaction = transaction + 1;
648 mgmt->u.auth.status_code = cpu_to_le16(0);
650 memcpy(skb_put(skb, extra_len), extra, extra_len);
652 ieee80211_sta_tx(dev, skb, encrypt);
656 static void ieee80211_authenticate(struct net_device *dev,
657 struct ieee80211_if_sta *ifsta)
659 DECLARE_MAC_BUF(mac);
662 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
663 printk(KERN_DEBUG "%s: authentication with AP %s"
665 dev->name, print_mac(mac, ifsta->bssid));
666 ifsta->state = IEEE80211_DISABLED;
670 ifsta->state = IEEE80211_AUTHENTICATE;
671 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
672 dev->name, print_mac(mac, ifsta->bssid));
674 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
676 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
679 static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss,
680 struct ieee80211_supported_band *sband,
686 for (i = 0; i < bss->supp_rates_len; i++) {
687 int rate = (bss->supp_rates[i] & 0x7F) * 5;
689 for (j = 0; j < sband->n_bitrates; j++)
690 if (sband->bitrates[j].bitrate == rate) {
700 static void ieee80211_send_assoc(struct net_device *dev,
701 struct ieee80211_if_sta *ifsta)
703 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
705 struct ieee80211_mgmt *mgmt;
707 int i, len, count, rates_len, supp_rates_len;
709 struct ieee80211_sta_bss *bss;
711 struct ieee80211_supported_band *sband;
714 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
715 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
718 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
719 "frame\n", dev->name);
722 skb_reserve(skb, local->hw.extra_tx_headroom);
724 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
726 capab = ifsta->capab;
728 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
729 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
730 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
731 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
732 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
735 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
736 local->hw.conf.channel->center_freq,
737 ifsta->ssid, ifsta->ssid_len);
739 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
740 capab |= WLAN_CAPABILITY_PRIVACY;
744 /* get all rates supported by the device and the AP as
745 * some APs don't like getting a superset of their rates
746 * in the association request (e.g. D-Link DAP 1353 in
748 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
750 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
751 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
752 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
754 ieee80211_rx_bss_put(dev, bss);
757 rates_len = sband->n_bitrates;
760 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
762 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
763 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
764 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
766 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
768 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
769 IEEE80211_STYPE_REASSOC_REQ);
770 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
771 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
772 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
776 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
777 IEEE80211_STYPE_ASSOC_REQ);
778 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
779 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
783 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
784 *pos++ = WLAN_EID_SSID;
785 *pos++ = ifsta->ssid_len;
786 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
788 /* add all rates which were marked to be used above */
789 supp_rates_len = rates_len;
790 if (supp_rates_len > 8)
793 len = sband->n_bitrates;
794 pos = skb_put(skb, supp_rates_len + 2);
795 *pos++ = WLAN_EID_SUPP_RATES;
796 *pos++ = supp_rates_len;
799 for (i = 0; i < sband->n_bitrates; i++) {
800 if (BIT(i) & rates) {
801 int rate = sband->bitrates[i].bitrate;
802 *pos++ = (u8) (rate / 5);
809 pos = skb_put(skb, rates_len - count + 2);
810 *pos++ = WLAN_EID_EXT_SUPP_RATES;
811 *pos++ = rates_len - count;
813 for (i++; i < sband->n_bitrates; i++) {
814 if (BIT(i) & rates) {
815 int rate = sband->bitrates[i].bitrate;
816 *pos++ = (u8) (rate / 5);
821 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
822 /* 1. power capabilities */
823 pos = skb_put(skb, 4);
824 *pos++ = WLAN_EID_PWR_CAPABILITY;
826 *pos++ = 0; /* min tx power */
827 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
829 /* 2. supported channels */
830 /* TODO: get this in reg domain format */
831 pos = skb_put(skb, 2 * sband->n_channels + 2);
832 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
833 *pos++ = 2 * sband->n_channels;
834 for (i = 0; i < sband->n_channels; i++) {
835 *pos++ = ieee80211_frequency_to_channel(
836 sband->channels[i].center_freq);
837 *pos++ = 1; /* one channel in the subband*/
841 if (ifsta->extra_ie) {
842 pos = skb_put(skb, ifsta->extra_ie_len);
843 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
846 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
847 pos = skb_put(skb, 9);
848 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
849 *pos++ = 7; /* len */
850 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
853 *pos++ = 2; /* WME */
854 *pos++ = 0; /* WME info */
855 *pos++ = 1; /* WME ver */
859 /* wmm support is a must to HT */
860 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
861 sband->ht_info.ht_supported && bss->ht_add_ie) {
862 struct ieee80211_ht_addt_info *ht_add_info =
863 (struct ieee80211_ht_addt_info *)bss->ht_add_ie;
864 u16 cap = sband->ht_info.cap;
866 u32 flags = local->hw.conf.channel->flags;
868 switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) {
869 case IEEE80211_HT_IE_CHA_SEC_ABOVE:
870 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
871 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
872 cap &= ~IEEE80211_HT_CAP_SGI_40;
875 case IEEE80211_HT_IE_CHA_SEC_BELOW:
876 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
877 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
878 cap &= ~IEEE80211_HT_CAP_SGI_40;
883 tmp = cpu_to_le16(cap);
884 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
885 *pos++ = WLAN_EID_HT_CAPABILITY;
886 *pos++ = sizeof(struct ieee80211_ht_cap);
887 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
888 memcpy(pos, &tmp, sizeof(u16));
890 /* TODO: needs a define here for << 2 */
891 *pos++ = sband->ht_info.ampdu_factor |
892 (sband->ht_info.ampdu_density << 2);
893 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
896 kfree(ifsta->assocreq_ies);
897 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
898 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
899 if (ifsta->assocreq_ies)
900 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
902 ieee80211_sta_tx(dev, skb, 0);
906 static void ieee80211_send_deauth(struct net_device *dev,
907 struct ieee80211_if_sta *ifsta, u16 reason)
909 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
911 struct ieee80211_mgmt *mgmt;
913 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
915 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
916 "frame\n", dev->name);
919 skb_reserve(skb, local->hw.extra_tx_headroom);
921 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
923 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
924 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
925 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
926 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
927 IEEE80211_STYPE_DEAUTH);
929 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
931 ieee80211_sta_tx(dev, skb, 0);
935 static void ieee80211_send_disassoc(struct net_device *dev,
936 struct ieee80211_if_sta *ifsta, u16 reason)
938 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
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 disassoc "
945 "frame\n", 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, dev->dev_addr, ETH_ALEN);
954 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
955 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
956 IEEE80211_STYPE_DISASSOC);
958 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
960 ieee80211_sta_tx(dev, skb, 0);
964 static int ieee80211_privacy_mismatch(struct net_device *dev,
965 struct ieee80211_if_sta *ifsta)
967 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
968 struct ieee80211_sta_bss *bss;
973 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
976 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
977 local->hw.conf.channel->center_freq,
978 ifsta->ssid, ifsta->ssid_len);
982 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
983 wep_privacy = !!ieee80211_sta_wep_configured(dev);
984 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
986 ieee80211_rx_bss_put(dev, bss);
988 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
995 static void ieee80211_associate(struct net_device *dev,
996 struct ieee80211_if_sta *ifsta)
998 DECLARE_MAC_BUF(mac);
1000 ifsta->assoc_tries++;
1001 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
1002 printk(KERN_DEBUG "%s: association with AP %s"
1004 dev->name, print_mac(mac, ifsta->bssid));
1005 ifsta->state = IEEE80211_DISABLED;
1009 ifsta->state = IEEE80211_ASSOCIATE;
1010 printk(KERN_DEBUG "%s: associate with AP %s\n",
1011 dev->name, print_mac(mac, ifsta->bssid));
1012 if (ieee80211_privacy_mismatch(dev, ifsta)) {
1013 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
1014 "mixed-cell disabled - abort association\n", dev->name);
1015 ifsta->state = IEEE80211_DISABLED;
1019 ieee80211_send_assoc(dev, ifsta);
1021 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1025 static void ieee80211_associated(struct net_device *dev,
1026 struct ieee80211_if_sta *ifsta)
1028 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1029 struct sta_info *sta;
1031 DECLARE_MAC_BUF(mac);
1033 /* TODO: start monitoring current AP signal quality and number of
1034 * missed beacons. Scan other channels every now and then and search
1035 * for better APs. */
1036 /* TODO: remove expired BSSes */
1038 ifsta->state = IEEE80211_ASSOCIATED;
1042 sta = sta_info_get(local, ifsta->bssid);
1044 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
1045 dev->name, print_mac(mac, ifsta->bssid));
1049 if (time_after(jiffies,
1050 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
1051 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
1052 printk(KERN_DEBUG "%s: No ProbeResp from "
1053 "current AP %s - assume out of "
1055 dev->name, print_mac(mac, ifsta->bssid));
1057 sta_info_unlink(&sta);
1059 ieee80211_send_probe_req(dev, ifsta->bssid,
1061 local->scan_ssid_len);
1062 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
1064 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1065 if (time_after(jiffies, ifsta->last_probe +
1066 IEEE80211_PROBE_INTERVAL)) {
1067 ifsta->last_probe = jiffies;
1068 ieee80211_send_probe_req(dev, ifsta->bssid,
1077 if (disassoc && sta)
1078 sta_info_destroy(sta);
1081 ifsta->state = IEEE80211_DISABLED;
1082 ieee80211_set_associated(dev, ifsta, 0);
1084 mod_timer(&ifsta->timer, jiffies +
1085 IEEE80211_MONITORING_INTERVAL);
1090 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
1091 u8 *ssid, size_t ssid_len)
1093 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1094 struct ieee80211_supported_band *sband;
1095 struct sk_buff *skb;
1096 struct ieee80211_mgmt *mgmt;
1097 u8 *pos, *supp_rates, *esupp_rates = NULL;
1100 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
1102 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1103 "request\n", dev->name);
1106 skb_reserve(skb, local->hw.extra_tx_headroom);
1108 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1109 memset(mgmt, 0, 24);
1110 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1111 IEEE80211_STYPE_PROBE_REQ);
1112 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1114 memcpy(mgmt->da, dst, ETH_ALEN);
1115 memcpy(mgmt->bssid, dst, ETH_ALEN);
1117 memset(mgmt->da, 0xff, ETH_ALEN);
1118 memset(mgmt->bssid, 0xff, ETH_ALEN);
1120 pos = skb_put(skb, 2 + ssid_len);
1121 *pos++ = WLAN_EID_SSID;
1123 memcpy(pos, ssid, ssid_len);
1125 supp_rates = skb_put(skb, 2);
1126 supp_rates[0] = WLAN_EID_SUPP_RATES;
1128 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1130 for (i = 0; i < sband->n_bitrates; i++) {
1131 struct ieee80211_rate *rate = &sband->bitrates[i];
1133 pos = skb_put(skb, 1);
1135 } else if (supp_rates[1] == 8) {
1136 esupp_rates = skb_put(skb, 3);
1137 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1139 pos = &esupp_rates[2];
1141 pos = skb_put(skb, 1);
1144 *pos = rate->bitrate / 5;
1147 ieee80211_sta_tx(dev, skb, 0);
1151 static int ieee80211_sta_wep_configured(struct net_device *dev)
1153 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1154 if (!sdata || !sdata->default_key ||
1155 sdata->default_key->conf.alg != ALG_WEP)
1161 static void ieee80211_auth_completed(struct net_device *dev,
1162 struct ieee80211_if_sta *ifsta)
1164 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
1165 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1166 ieee80211_associate(dev, ifsta);
1170 static void ieee80211_auth_challenge(struct net_device *dev,
1171 struct ieee80211_if_sta *ifsta,
1172 struct ieee80211_mgmt *mgmt,
1176 struct ieee802_11_elems elems;
1178 printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
1179 pos = mgmt->u.auth.variable;
1180 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1181 if (!elems.challenge) {
1182 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
1183 "frame\n", dev->name);
1186 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1187 elems.challenge_len + 2, 1);
1190 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1191 u8 dialog_token, u16 status, u16 policy,
1192 u16 buf_size, u16 timeout)
1194 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1195 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1196 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1197 struct sk_buff *skb;
1198 struct ieee80211_mgmt *mgmt;
1201 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1204 printk(KERN_DEBUG "%s: failed to allocate buffer "
1205 "for addba resp frame\n", dev->name);
1209 skb_reserve(skb, local->hw.extra_tx_headroom);
1210 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1211 memset(mgmt, 0, 24);
1212 memcpy(mgmt->da, da, ETH_ALEN);
1213 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1214 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1215 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1217 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1218 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1219 IEEE80211_STYPE_ACTION);
1221 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1222 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1223 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1224 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1226 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1227 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1228 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1230 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1231 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1232 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1234 ieee80211_sta_tx(dev, skb, 0);
1239 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1240 u16 tid, u8 dialog_token, u16 start_seq_num,
1241 u16 agg_size, u16 timeout)
1243 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1244 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1245 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1246 struct sk_buff *skb;
1247 struct ieee80211_mgmt *mgmt;
1250 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1253 printk(KERN_ERR "%s: failed to allocate buffer "
1254 "for addba request frame\n", dev->name);
1257 skb_reserve(skb, local->hw.extra_tx_headroom);
1258 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1259 memset(mgmt, 0, 24);
1260 memcpy(mgmt->da, da, ETH_ALEN);
1261 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1262 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1263 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1265 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1267 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1268 IEEE80211_STYPE_ACTION);
1270 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1272 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1273 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1275 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1276 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
1277 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1278 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
1280 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1282 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1283 mgmt->u.action.u.addba_req.start_seq_num =
1284 cpu_to_le16(start_seq_num << 4);
1286 ieee80211_sta_tx(dev, skb, 0);
1289 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1290 struct ieee80211_mgmt *mgmt,
1293 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1294 struct ieee80211_hw *hw = &local->hw;
1295 struct ieee80211_conf *conf = &hw->conf;
1296 struct sta_info *sta;
1297 struct tid_ampdu_rx *tid_agg_rx;
1298 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1300 int ret = -EOPNOTSUPP;
1301 DECLARE_MAC_BUF(mac);
1305 sta = sta_info_get(local, mgmt->sa);
1311 /* extract session parameters from addba request frame */
1312 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1313 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1315 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1317 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1318 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1319 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1320 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1322 status = WLAN_STATUS_REQUEST_DECLINED;
1324 /* sanity check for incoming parameters:
1325 * check if configuration can support the BA policy
1326 * and if buffer size does not exceeds max value */
1327 if (((ba_policy != 1)
1328 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1329 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1330 status = WLAN_STATUS_INVALID_QOS_PARAM;
1331 #ifdef CONFIG_MAC80211_HT_DEBUG
1332 if (net_ratelimit())
1333 printk(KERN_DEBUG "AddBA Req with bad params from "
1334 "%s on tid %u. policy %d, buffer size %d\n",
1335 print_mac(mac, mgmt->sa), tid, ba_policy,
1337 #endif /* CONFIG_MAC80211_HT_DEBUG */
1340 /* determine default buffer size */
1341 if (buf_size == 0) {
1342 struct ieee80211_supported_band *sband;
1344 sband = local->hw.wiphy->bands[conf->channel->band];
1345 buf_size = IEEE80211_MIN_AMPDU_BUF;
1346 buf_size = buf_size << sband->ht_info.ampdu_factor;
1350 /* examine state machine */
1351 spin_lock_bh(&sta->lock);
1353 if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
1354 #ifdef CONFIG_MAC80211_HT_DEBUG
1355 if (net_ratelimit())
1356 printk(KERN_DEBUG "unexpected AddBA Req from "
1358 print_mac(mac, mgmt->sa), tid);
1359 #endif /* CONFIG_MAC80211_HT_DEBUG */
1363 /* prepare A-MPDU MLME for Rx aggregation */
1364 sta->ampdu_mlme.tid_rx[tid] =
1365 kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1366 if (!sta->ampdu_mlme.tid_rx[tid]) {
1367 if (net_ratelimit())
1368 printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1373 sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1374 sta_rx_agg_session_timer_expired;
1375 sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1376 (unsigned long)&sta->timer_to_tid[tid];
1377 init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1379 tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1381 /* prepare reordering buffer */
1382 tid_agg_rx->reorder_buf =
1383 kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC);
1384 if (!tid_agg_rx->reorder_buf) {
1385 if (net_ratelimit())
1386 printk(KERN_ERR "can not allocate reordering buffer "
1387 "to tid %d\n", tid);
1388 kfree(sta->ampdu_mlme.tid_rx[tid]);
1391 memset(tid_agg_rx->reorder_buf, 0,
1392 buf_size * sizeof(struct sk_buff *));
1394 if (local->ops->ampdu_action)
1395 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1396 sta->addr, tid, &start_seq_num);
1397 #ifdef CONFIG_MAC80211_HT_DEBUG
1398 printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
1399 #endif /* CONFIG_MAC80211_HT_DEBUG */
1402 kfree(tid_agg_rx->reorder_buf);
1404 sta->ampdu_mlme.tid_rx[tid] = NULL;
1408 /* change state and send addba resp */
1409 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
1410 tid_agg_rx->dialog_token = dialog_token;
1411 tid_agg_rx->ssn = start_seq_num;
1412 tid_agg_rx->head_seq_num = start_seq_num;
1413 tid_agg_rx->buf_size = buf_size;
1414 tid_agg_rx->timeout = timeout;
1415 tid_agg_rx->stored_mpdu_num = 0;
1416 status = WLAN_STATUS_SUCCESS;
1418 spin_unlock_bh(&sta->lock);
1421 ieee80211_send_addba_resp(sta->sdata->dev, sta->addr, tid,
1422 dialog_token, status, 1, buf_size, timeout);
1426 static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1427 struct ieee80211_mgmt *mgmt,
1430 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1431 struct ieee80211_hw *hw = &local->hw;
1432 struct sta_info *sta;
1439 sta = sta_info_get(local, mgmt->sa);
1445 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1446 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1448 state = &sta->ampdu_mlme.tid_state_tx[tid];
1450 spin_lock_bh(&sta->lock);
1452 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1453 spin_unlock_bh(&sta->lock);
1454 printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1456 goto addba_resp_exit;
1459 if (mgmt->u.action.u.addba_resp.dialog_token !=
1460 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
1461 spin_unlock_bh(&sta->lock);
1462 #ifdef CONFIG_MAC80211_HT_DEBUG
1463 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1464 #endif /* CONFIG_MAC80211_HT_DEBUG */
1465 goto addba_resp_exit;
1468 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
1469 #ifdef CONFIG_MAC80211_HT_DEBUG
1470 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1471 #endif /* CONFIG_MAC80211_HT_DEBUG */
1472 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1473 == WLAN_STATUS_SUCCESS) {
1474 if (*state & HT_ADDBA_RECEIVED_MSK)
1475 printk(KERN_DEBUG "double addBA response\n");
1477 *state |= HT_ADDBA_RECEIVED_MSK;
1478 sta->ampdu_mlme.addba_req_num[tid] = 0;
1480 if (*state == HT_AGG_STATE_OPERATIONAL) {
1481 printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1482 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1485 spin_unlock_bh(&sta->lock);
1486 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1488 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1490 sta->ampdu_mlme.addba_req_num[tid]++;
1491 /* this will allow the state check in stop_BA_session */
1492 *state = HT_AGG_STATE_OPERATIONAL;
1493 spin_unlock_bh(&sta->lock);
1494 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1495 WLAN_BACK_INITIATOR);
1502 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1503 u16 initiator, u16 reason_code)
1505 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1506 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1507 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1508 struct sk_buff *skb;
1509 struct ieee80211_mgmt *mgmt;
1512 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1515 printk(KERN_ERR "%s: failed to allocate buffer "
1516 "for delba frame\n", dev->name);
1520 skb_reserve(skb, local->hw.extra_tx_headroom);
1521 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1522 memset(mgmt, 0, 24);
1523 memcpy(mgmt->da, da, ETH_ALEN);
1524 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1525 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1526 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1528 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1529 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1530 IEEE80211_STYPE_ACTION);
1532 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1534 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1535 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1536 params = (u16)(initiator << 11); /* bit 11 initiator */
1537 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1539 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1540 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1542 ieee80211_sta_tx(dev, skb, 0);
1545 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1546 u16 initiator, u16 reason)
1548 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1549 struct ieee80211_hw *hw = &local->hw;
1550 struct sta_info *sta;
1552 DECLARE_MAC_BUF(mac);
1556 sta = sta_info_get(local, ra);
1562 /* check if TID is in operational state */
1563 spin_lock_bh(&sta->lock);
1564 if (sta->ampdu_mlme.tid_state_rx[tid]
1565 != HT_AGG_STATE_OPERATIONAL) {
1566 spin_unlock_bh(&sta->lock);
1570 sta->ampdu_mlme.tid_state_rx[tid] =
1571 HT_AGG_STATE_REQ_STOP_BA_MSK |
1572 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1573 spin_unlock_bh(&sta->lock);
1575 /* stop HW Rx aggregation. ampdu_action existence
1576 * already verified in session init so we add the BUG_ON */
1577 BUG_ON(!local->ops->ampdu_action);
1579 #ifdef CONFIG_MAC80211_HT_DEBUG
1580 printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n",
1581 print_mac(mac, ra), tid);
1582 #endif /* CONFIG_MAC80211_HT_DEBUG */
1584 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1587 printk(KERN_DEBUG "HW problem - can not stop rx "
1588 "aggergation for tid %d\n", tid);
1590 /* shutdown timer has not expired */
1591 if (initiator != WLAN_BACK_TIMER)
1592 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1594 /* check if this is a self generated aggregation halt */
1595 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1596 ieee80211_send_delba(dev, ra, tid, 0, reason);
1598 /* free the reordering buffer */
1599 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1600 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
1601 /* release the reordered frames */
1602 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1603 sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1604 sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
1607 /* free resources */
1608 kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1609 kfree(sta->ampdu_mlme.tid_rx[tid]);
1610 sta->ampdu_mlme.tid_rx[tid] = NULL;
1611 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
1617 static void ieee80211_sta_process_delba(struct net_device *dev,
1618 struct ieee80211_mgmt *mgmt, size_t len)
1620 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1621 struct sta_info *sta;
1624 DECLARE_MAC_BUF(mac);
1628 sta = sta_info_get(local, mgmt->sa);
1634 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1635 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1636 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1638 #ifdef CONFIG_MAC80211_HT_DEBUG
1639 if (net_ratelimit())
1640 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1641 print_mac(mac, mgmt->sa),
1642 initiator ? "initiator" : "recipient", tid,
1643 mgmt->u.action.u.delba.reason_code);
1644 #endif /* CONFIG_MAC80211_HT_DEBUG */
1646 if (initiator == WLAN_BACK_INITIATOR)
1647 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1648 WLAN_BACK_INITIATOR, 0);
1649 else { /* WLAN_BACK_RECIPIENT */
1650 spin_lock_bh(&sta->lock);
1651 sta->ampdu_mlme.tid_state_tx[tid] =
1652 HT_AGG_STATE_OPERATIONAL;
1653 spin_unlock_bh(&sta->lock);
1654 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1655 WLAN_BACK_RECIPIENT);
1661 * After sending add Block Ack request we activated a timer until
1662 * add Block Ack response will arrive from the recipient.
1663 * If this timer expires sta_addba_resp_timer_expired will be executed.
1665 void sta_addba_resp_timer_expired(unsigned long data)
1667 /* not an elegant detour, but there is no choice as the timer passes
1668 * only one argument, and both sta_info and TID are needed, so init
1669 * flow in sta_info_create gives the TID as data, while the timer_to_id
1670 * array gives the sta through container_of */
1671 u16 tid = *(u8 *)data;
1672 struct sta_info *temp_sta = container_of((void *)data,
1673 struct sta_info, timer_to_tid[tid]);
1675 struct ieee80211_local *local = temp_sta->local;
1676 struct ieee80211_hw *hw = &local->hw;
1677 struct sta_info *sta;
1682 sta = sta_info_get(local, temp_sta->addr);
1688 state = &sta->ampdu_mlme.tid_state_tx[tid];
1689 /* check if the TID waits for addBA response */
1690 spin_lock_bh(&sta->lock);
1691 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1692 spin_unlock_bh(&sta->lock);
1693 *state = HT_AGG_STATE_IDLE;
1694 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1695 "expecting addBA response there", tid);
1696 goto timer_expired_exit;
1699 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1701 /* go through the state check in stop_BA_session */
1702 *state = HT_AGG_STATE_OPERATIONAL;
1703 spin_unlock_bh(&sta->lock);
1704 ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1705 WLAN_BACK_INITIATOR);
1712 * After accepting the AddBA Request we activated a timer,
1713 * resetting it after each frame that arrives from the originator.
1714 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1716 static void sta_rx_agg_session_timer_expired(unsigned long data)
1718 /* not an elegant detour, but there is no choice as the timer passes
1719 * only one argument, and various sta_info are needed here, so init
1720 * flow in sta_info_create gives the TID as data, while the timer_to_id
1721 * array gives the sta through container_of */
1722 u8 *ptid = (u8 *)data;
1723 u8 *timer_to_id = ptid - *ptid;
1724 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1727 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1728 ieee80211_sta_stop_rx_ba_session(sta->sdata->dev, sta->addr,
1729 (u16)*ptid, WLAN_BACK_TIMER,
1730 WLAN_REASON_QSTA_TIMEOUT);
1733 void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr)
1735 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1738 for (i = 0; i < STA_TID_NUM; i++) {
1739 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1740 WLAN_BACK_INITIATOR);
1741 ieee80211_sta_stop_rx_ba_session(dev, addr, i,
1742 WLAN_BACK_RECIPIENT,
1743 WLAN_REASON_QSTA_LEAVE_QBSS);
1747 static void ieee80211_send_refuse_measurement_request(struct net_device *dev,
1748 struct ieee80211_msrment_ie *request_ie,
1749 const u8 *da, const u8 *bssid,
1752 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1753 struct sk_buff *skb;
1754 struct ieee80211_mgmt *msr_report;
1756 skb = dev_alloc_skb(sizeof(*msr_report) + local->hw.extra_tx_headroom +
1757 sizeof(struct ieee80211_msrment_ie));
1760 printk(KERN_ERR "%s: failed to allocate buffer for "
1761 "measurement report frame\n", dev->name);
1765 skb_reserve(skb, local->hw.extra_tx_headroom);
1766 msr_report = (struct ieee80211_mgmt *)skb_put(skb, 24);
1767 memset(msr_report, 0, 24);
1768 memcpy(msr_report->da, da, ETH_ALEN);
1769 memcpy(msr_report->sa, dev->dev_addr, ETH_ALEN);
1770 memcpy(msr_report->bssid, bssid, ETH_ALEN);
1771 msr_report->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1772 IEEE80211_STYPE_ACTION);
1774 skb_put(skb, 1 + sizeof(msr_report->u.action.u.measurement));
1775 msr_report->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
1776 msr_report->u.action.u.measurement.action_code =
1777 WLAN_ACTION_SPCT_MSR_RPRT;
1778 msr_report->u.action.u.measurement.dialog_token = dialog_token;
1780 msr_report->u.action.u.measurement.element_id = WLAN_EID_MEASURE_REPORT;
1781 msr_report->u.action.u.measurement.length =
1782 sizeof(struct ieee80211_msrment_ie);
1784 memset(&msr_report->u.action.u.measurement.msr_elem, 0,
1785 sizeof(struct ieee80211_msrment_ie));
1786 msr_report->u.action.u.measurement.msr_elem.token = request_ie->token;
1787 msr_report->u.action.u.measurement.msr_elem.mode |=
1788 IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED;
1789 msr_report->u.action.u.measurement.msr_elem.type = request_ie->type;
1791 ieee80211_sta_tx(dev, skb, 0);
1794 static void ieee80211_sta_process_measurement_req(struct net_device *dev,
1795 struct ieee80211_mgmt *mgmt,
1799 * Ignoring measurement request is spec violation.
1800 * Mandatory measurements must be reported optional
1801 * measurements might be refused or reported incapable
1802 * For now just refuse
1803 * TODO: Answer basic measurement as unmeasured
1805 ieee80211_send_refuse_measurement_request(dev,
1806 &mgmt->u.action.u.measurement.msr_elem,
1807 mgmt->sa, mgmt->bssid,
1808 mgmt->u.action.u.measurement.dialog_token);
1812 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1813 struct ieee80211_if_sta *ifsta,
1814 struct ieee80211_mgmt *mgmt,
1817 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1818 u16 auth_alg, auth_transaction, status_code;
1819 DECLARE_MAC_BUF(mac);
1821 if (ifsta->state != IEEE80211_AUTHENTICATE &&
1822 sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
1823 printk(KERN_DEBUG "%s: authentication frame received from "
1824 "%s, but not in authenticate state - ignored\n",
1825 dev->name, print_mac(mac, mgmt->sa));
1830 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
1831 "received from %s - ignored\n",
1832 dev->name, len, print_mac(mac, mgmt->sa));
1836 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1837 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1838 printk(KERN_DEBUG "%s: authentication frame received from "
1839 "unknown AP (SA=%s BSSID=%s) - "
1840 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1841 print_mac(mac, mgmt->bssid));
1845 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1846 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1847 printk(KERN_DEBUG "%s: authentication frame received from "
1848 "unknown BSSID (SA=%s BSSID=%s) - "
1849 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1850 print_mac(mac, mgmt->bssid));
1854 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1855 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1856 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1858 printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
1859 "transaction=%d status=%d)\n",
1860 dev->name, print_mac(mac, mgmt->sa), auth_alg,
1861 auth_transaction, status_code);
1863 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1865 * IEEE 802.11 standard does not require authentication in IBSS
1866 * networks and most implementations do not seem to use it.
1867 * However, try to reply to authentication attempts if someone
1868 * has actually implemented this.
1870 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1871 printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1872 "frame (alg=%d transaction=%d)\n",
1873 dev->name, auth_alg, auth_transaction);
1876 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1879 if (auth_alg != ifsta->auth_alg ||
1880 auth_transaction != ifsta->auth_transaction) {
1881 printk(KERN_DEBUG "%s: unexpected authentication frame "
1882 "(alg=%d transaction=%d)\n",
1883 dev->name, auth_alg, auth_transaction);
1887 if (status_code != WLAN_STATUS_SUCCESS) {
1888 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1889 "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1890 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1892 const int num_algs = ARRAY_SIZE(algs);
1894 algs[0] = algs[1] = algs[2] = 0xff;
1895 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1896 algs[0] = WLAN_AUTH_OPEN;
1897 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1898 algs[1] = WLAN_AUTH_SHARED_KEY;
1899 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1900 algs[2] = WLAN_AUTH_LEAP;
1901 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1903 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1907 for (i = 0; i < num_algs; i++) {
1909 if (pos >= num_algs)
1911 if (algs[pos] == ifsta->auth_alg ||
1914 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1915 !ieee80211_sta_wep_configured(dev))
1917 ifsta->auth_alg = algs[pos];
1918 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1920 dev->name, ifsta->auth_alg);
1927 switch (ifsta->auth_alg) {
1928 case WLAN_AUTH_OPEN:
1929 case WLAN_AUTH_LEAP:
1930 ieee80211_auth_completed(dev, ifsta);
1932 case WLAN_AUTH_SHARED_KEY:
1933 if (ifsta->auth_transaction == 4)
1934 ieee80211_auth_completed(dev, ifsta);
1936 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1942 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1943 struct ieee80211_if_sta *ifsta,
1944 struct ieee80211_mgmt *mgmt,
1948 DECLARE_MAC_BUF(mac);
1951 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1952 "received from %s - ignored\n",
1953 dev->name, len, print_mac(mac, mgmt->sa));
1957 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1958 printk(KERN_DEBUG "%s: deauthentication frame received from "
1959 "unknown AP (SA=%s BSSID=%s) - "
1960 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1961 print_mac(mac, mgmt->bssid));
1965 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1967 printk(KERN_DEBUG "%s: RX deauthentication from %s"
1969 dev->name, print_mac(mac, mgmt->sa), reason_code);
1971 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
1972 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1974 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1975 ifsta->state == IEEE80211_ASSOCIATE ||
1976 ifsta->state == IEEE80211_ASSOCIATED) {
1977 ifsta->state = IEEE80211_AUTHENTICATE;
1978 mod_timer(&ifsta->timer, jiffies +
1979 IEEE80211_RETRY_AUTH_INTERVAL);
1982 ieee80211_set_disassoc(dev, ifsta, 1);
1983 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1987 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1988 struct ieee80211_if_sta *ifsta,
1989 struct ieee80211_mgmt *mgmt,
1993 DECLARE_MAC_BUF(mac);
1996 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1997 "received from %s - ignored\n",
1998 dev->name, len, print_mac(mac, mgmt->sa));
2002 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
2003 printk(KERN_DEBUG "%s: disassociation frame received from "
2004 "unknown AP (SA=%s BSSID=%s) - "
2005 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
2006 print_mac(mac, mgmt->bssid));
2010 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2012 printk(KERN_DEBUG "%s: RX disassociation from %s"
2014 dev->name, print_mac(mac, mgmt->sa), reason_code);
2016 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
2017 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
2019 if (ifsta->state == IEEE80211_ASSOCIATED) {
2020 ifsta->state = IEEE80211_ASSOCIATE;
2021 mod_timer(&ifsta->timer, jiffies +
2022 IEEE80211_RETRY_AUTH_INTERVAL);
2025 ieee80211_set_disassoc(dev, ifsta, 0);
2029 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2030 struct ieee80211_if_sta *ifsta,
2031 struct ieee80211_mgmt *mgmt,
2035 struct ieee80211_local *local = sdata->local;
2036 struct net_device *dev = sdata->dev;
2037 struct ieee80211_supported_band *sband;
2038 struct sta_info *sta;
2039 u64 rates, basic_rates;
2040 u16 capab_info, status_code, aid;
2041 struct ieee802_11_elems elems;
2042 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
2045 DECLARE_MAC_BUF(mac);
2046 bool have_higher_than_11mbit = false;
2048 /* AssocResp and ReassocResp have identical structure, so process both
2049 * of them in this function. */
2051 if (ifsta->state != IEEE80211_ASSOCIATE) {
2052 printk(KERN_DEBUG "%s: association frame received from "
2053 "%s, but not in associate state - ignored\n",
2054 dev->name, print_mac(mac, mgmt->sa));
2059 printk(KERN_DEBUG "%s: too short (%zd) association frame "
2060 "received from %s - ignored\n",
2061 dev->name, len, print_mac(mac, mgmt->sa));
2065 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
2066 printk(KERN_DEBUG "%s: association frame received from "
2067 "unknown AP (SA=%s BSSID=%s) - "
2068 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
2069 print_mac(mac, mgmt->bssid));
2073 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2074 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2075 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2077 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
2078 "status=%d aid=%d)\n",
2079 dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
2080 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2082 if (status_code != WLAN_STATUS_SUCCESS) {
2083 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
2084 dev->name, status_code);
2085 /* if this was a reassociation, ensure we try a "full"
2086 * association next time. This works around some broken APs
2087 * which do not correctly reject reassociation requests. */
2088 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2092 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2093 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
2094 "set\n", dev->name, aid);
2095 aid &= ~(BIT(15) | BIT(14));
2097 pos = mgmt->u.assoc_resp.variable;
2098 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2100 if (!elems.supp_rates) {
2101 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
2106 printk(KERN_DEBUG "%s: associated\n", dev->name);
2108 ifsta->ap_capab = capab_info;
2110 kfree(ifsta->assocresp_ies);
2111 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
2112 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
2113 if (ifsta->assocresp_ies)
2114 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
2118 /* Add STA entry for the AP */
2119 sta = sta_info_get(local, ifsta->bssid);
2121 struct ieee80211_sta_bss *bss;
2124 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
2126 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
2127 " the AP\n", dev->name);
2131 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
2132 local->hw.conf.channel->center_freq,
2133 ifsta->ssid, ifsta->ssid_len);
2135 sta->last_signal = bss->signal;
2136 sta->last_qual = bss->qual;
2137 sta->last_noise = bss->noise;
2138 ieee80211_rx_bss_put(dev, bss);
2141 err = sta_info_insert(sta);
2143 printk(KERN_DEBUG "%s: failed to insert STA entry for"
2144 " the AP (error %d)\n", dev->name, err);
2151 * FIXME: Do we really need to update the sta_info's information here?
2152 * We already know about the AP (we found it in our list) so it
2153 * should already be filled with the right info, no?
2154 * As is stands, all this is racy because typically we assume
2155 * the information that is filled in here (except flags) doesn't
2156 * change while a STA structure is alive. As such, it should move
2157 * to between the sta_info_alloc() and sta_info_insert() above.
2160 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
2161 WLAN_STA_AUTHORIZED);
2165 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2167 for (i = 0; i < elems.supp_rates_len; i++) {
2168 int rate = (elems.supp_rates[i] & 0x7f) * 5;
2171 have_higher_than_11mbit = true;
2173 for (j = 0; j < sband->n_bitrates; j++) {
2174 if (sband->bitrates[j].bitrate == rate)
2176 if (elems.supp_rates[i] & 0x80)
2177 basic_rates |= BIT(j);
2181 for (i = 0; i < elems.ext_supp_rates_len; i++) {
2182 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
2185 have_higher_than_11mbit = true;
2187 for (j = 0; j < sband->n_bitrates; j++) {
2188 if (sband->bitrates[j].bitrate == rate)
2190 if (elems.ext_supp_rates[i] & 0x80)
2191 basic_rates |= BIT(j);
2195 sta->supp_rates[local->hw.conf.channel->band] = rates;
2196 sdata->basic_rates = basic_rates;
2198 /* cf. IEEE 802.11 9.2.12 */
2199 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2200 have_higher_than_11mbit)
2201 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2203 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
2205 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
2206 (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2207 struct ieee80211_ht_bss_info bss_info;
2208 ieee80211_ht_cap_ie_to_ht_info(
2209 (struct ieee80211_ht_cap *)
2210 elems.ht_cap_elem, &sta->ht_info);
2211 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2212 (struct ieee80211_ht_addt_info *)
2213 elems.ht_info_elem, &bss_info);
2214 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
2217 rate_control_rate_init(sta, local);
2219 if (elems.wmm_param) {
2220 set_sta_flags(sta, WLAN_STA_WME);
2222 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2223 elems.wmm_param_len);
2227 /* set AID and assoc capability,
2228 * ieee80211_set_associated() will tell the driver */
2229 bss_conf->aid = aid;
2230 bss_conf->assoc_capability = capab_info;
2231 ieee80211_set_associated(dev, ifsta, 1);
2233 ieee80211_associated(dev, ifsta);
2237 /* Caller must hold local->sta_bss_lock */
2238 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
2239 struct ieee80211_sta_bss *bss)
2241 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2244 if (bss_mesh_cfg(bss))
2245 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2246 bss_mesh_id_len(bss));
2248 hash_idx = STA_HASH(bss->bssid);
2250 bss->hnext = local->sta_bss_hash[hash_idx];
2251 local->sta_bss_hash[hash_idx] = bss;
2255 /* Caller must hold local->sta_bss_lock */
2256 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
2257 struct ieee80211_sta_bss *bss)
2259 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2260 struct ieee80211_sta_bss *b, *prev = NULL;
2261 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2265 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2268 prev->hnext = bss->hnext;
2277 static struct ieee80211_sta_bss *
2278 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
2279 u8 *ssid, u8 ssid_len)
2281 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2282 struct ieee80211_sta_bss *bss;
2284 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2287 atomic_inc(&bss->users);
2288 atomic_inc(&bss->users);
2289 memcpy(bss->bssid, bssid, ETH_ALEN);
2291 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2292 memcpy(bss->ssid, ssid, ssid_len);
2293 bss->ssid_len = ssid_len;
2296 spin_lock_bh(&local->sta_bss_lock);
2297 /* TODO: order by RSSI? */
2298 list_add_tail(&bss->list, &local->sta_bss_list);
2299 __ieee80211_rx_bss_hash_add(dev, bss);
2300 spin_unlock_bh(&local->sta_bss_lock);
2304 static struct ieee80211_sta_bss *
2305 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
2306 u8 *ssid, u8 ssid_len)
2308 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2309 struct ieee80211_sta_bss *bss;
2311 spin_lock_bh(&local->sta_bss_lock);
2312 bss = local->sta_bss_hash[STA_HASH(bssid)];
2314 if (!bss_mesh_cfg(bss) &&
2315 !memcmp(bss->bssid, bssid, ETH_ALEN) &&
2316 bss->freq == freq &&
2317 bss->ssid_len == ssid_len &&
2318 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
2319 atomic_inc(&bss->users);
2324 spin_unlock_bh(&local->sta_bss_lock);
2328 #ifdef CONFIG_MAC80211_MESH
2329 static struct ieee80211_sta_bss *
2330 ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2331 u8 *mesh_cfg, int freq)
2333 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2334 struct ieee80211_sta_bss *bss;
2336 spin_lock_bh(&local->sta_bss_lock);
2337 bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2339 if (bss_mesh_cfg(bss) &&
2340 !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
2341 bss->freq == freq &&
2342 mesh_id_len == bss->mesh_id_len &&
2343 (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2345 atomic_inc(&bss->users);
2350 spin_unlock_bh(&local->sta_bss_lock);
2354 static struct ieee80211_sta_bss *
2355 ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2356 u8 *mesh_cfg, int mesh_config_len, int freq)
2358 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2359 struct ieee80211_sta_bss *bss;
2361 if (mesh_config_len != MESH_CFG_LEN)
2364 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2368 bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
2369 if (!bss->mesh_cfg) {
2374 if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2375 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2376 if (!bss->mesh_id) {
2377 kfree(bss->mesh_cfg);
2381 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2384 atomic_inc(&bss->users);
2385 atomic_inc(&bss->users);
2386 memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
2387 bss->mesh_id_len = mesh_id_len;
2389 spin_lock_bh(&local->sta_bss_lock);
2390 /* TODO: order by RSSI? */
2391 list_add_tail(&bss->list, &local->sta_bss_list);
2392 __ieee80211_rx_bss_hash_add(dev, bss);
2393 spin_unlock_bh(&local->sta_bss_lock);
2398 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2404 kfree(bss->ht_add_ie);
2405 kfree(bss_mesh_id(bss));
2406 kfree(bss_mesh_cfg(bss));
2411 static void ieee80211_rx_bss_put(struct net_device *dev,
2412 struct ieee80211_sta_bss *bss)
2414 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2417 if (!atomic_dec_and_lock(&bss->users, &local->sta_bss_lock)) {
2422 __ieee80211_rx_bss_hash_del(dev, bss);
2423 list_del(&bss->list);
2424 spin_unlock_bh(&local->sta_bss_lock);
2425 ieee80211_rx_bss_free(bss);
2429 void ieee80211_rx_bss_list_init(struct net_device *dev)
2431 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2432 spin_lock_init(&local->sta_bss_lock);
2433 INIT_LIST_HEAD(&local->sta_bss_list);
2437 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2439 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2440 struct ieee80211_sta_bss *bss, *tmp;
2442 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2443 ieee80211_rx_bss_put(dev, bss);
2447 static int ieee80211_sta_join_ibss(struct net_device *dev,
2448 struct ieee80211_if_sta *ifsta,
2449 struct ieee80211_sta_bss *bss)
2451 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2452 int res, rates, i, j;
2453 struct sk_buff *skb;
2454 struct ieee80211_mgmt *mgmt;
2455 struct ieee80211_tx_info *control;
2456 struct rate_selection ratesel;
2458 struct ieee80211_sub_if_data *sdata;
2459 struct ieee80211_supported_band *sband;
2460 union iwreq_data wrqu;
2462 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2464 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2466 /* Remove possible STA entries from other IBSS networks. */
2467 sta_info_flush_delayed(sdata);
2469 if (local->ops->reset_tsf) {
2470 /* Reset own TSF to allow time synchronization work. */
2471 local->ops->reset_tsf(local_to_hw(local));
2473 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2474 res = ieee80211_if_config(dev);
2478 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2480 sdata->drop_unencrypted = bss->capability &
2481 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2483 res = ieee80211_set_freq(dev, bss->freq);
2488 /* Set beacon template */
2489 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2494 skb_reserve(skb, local->hw.extra_tx_headroom);
2496 mgmt = (struct ieee80211_mgmt *)
2497 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2498 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2499 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2500 IEEE80211_STYPE_BEACON);
2501 memset(mgmt->da, 0xff, ETH_ALEN);
2502 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2503 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2504 mgmt->u.beacon.beacon_int =
2505 cpu_to_le16(local->hw.conf.beacon_int);
2506 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
2507 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2509 pos = skb_put(skb, 2 + ifsta->ssid_len);
2510 *pos++ = WLAN_EID_SSID;
2511 *pos++ = ifsta->ssid_len;
2512 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2514 rates = bss->supp_rates_len;
2517 pos = skb_put(skb, 2 + rates);
2518 *pos++ = WLAN_EID_SUPP_RATES;
2520 memcpy(pos, bss->supp_rates, rates);
2522 if (bss->band == IEEE80211_BAND_2GHZ) {
2523 pos = skb_put(skb, 2 + 1);
2524 *pos++ = WLAN_EID_DS_PARAMS;
2526 *pos++ = ieee80211_frequency_to_channel(bss->freq);
2529 pos = skb_put(skb, 2 + 2);
2530 *pos++ = WLAN_EID_IBSS_PARAMS;
2532 /* FIX: set ATIM window based on scan results */
2536 if (bss->supp_rates_len > 8) {
2537 rates = bss->supp_rates_len - 8;
2538 pos = skb_put(skb, 2 + rates);
2539 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2541 memcpy(pos, &bss->supp_rates[8], rates);
2544 control = IEEE80211_SKB_CB(skb);
2546 rate_control_get_rate(dev, sband, skb, &ratesel);
2547 if (ratesel.rate_idx < 0) {
2548 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2549 "for IBSS beacon\n", dev->name);
2552 control->control.vif = &sdata->vif;
2553 control->tx_rate_idx = ratesel.rate_idx;
2554 if (sdata->bss_conf.use_short_preamble &&
2555 sband->bitrates[ratesel.rate_idx].flags & IEEE80211_RATE_SHORT_PREAMBLE)
2556 control->flags |= IEEE80211_TX_CTL_SHORT_PREAMBLE;
2557 control->antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2558 control->flags |= IEEE80211_TX_CTL_NO_ACK;
2559 control->control.retry_limit = 1;
2561 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2562 if (ifsta->probe_resp) {
2563 mgmt = (struct ieee80211_mgmt *)
2564 ifsta->probe_resp->data;
2565 mgmt->frame_control =
2566 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2567 IEEE80211_STYPE_PROBE_RESP);
2569 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2570 "template for IBSS\n", dev->name);
2573 if (local->ops->beacon_update &&
2574 local->ops->beacon_update(local_to_hw(local), skb) == 0) {
2575 printk(KERN_DEBUG "%s: Configured IBSS beacon "
2576 "template\n", dev->name);
2581 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2582 for (i = 0; i < bss->supp_rates_len; i++) {
2583 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2584 for (j = 0; j < sband->n_bitrates; j++)
2585 if (sband->bitrates[j].bitrate == bitrate)
2588 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2590 ieee80211_sta_def_wmm_params(dev, bss, 1);
2594 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2595 "template\n", dev->name);
2599 ifsta->state = IEEE80211_IBSS_JOINED;
2600 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2602 memset(&wrqu, 0, sizeof(wrqu));
2603 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
2604 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
2609 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2610 struct ieee802_11_elems *elems,
2611 enum ieee80211_band band)
2613 struct ieee80211_supported_band *sband;
2614 struct ieee80211_rate *bitrates;
2618 sband = local->hw.wiphy->bands[band];
2622 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2625 bitrates = sband->bitrates;
2626 num_rates = sband->n_bitrates;
2628 for (i = 0; i < elems->supp_rates_len +
2629 elems->ext_supp_rates_len; i++) {
2632 if (i < elems->supp_rates_len)
2633 rate = elems->supp_rates[i];
2634 else if (elems->ext_supp_rates)
2635 rate = elems->ext_supp_rates
2636 [i - elems->supp_rates_len];
2637 own_rate = 5 * (rate & 0x7f);
2638 for (j = 0; j < num_rates; j++)
2639 if (bitrates[j].bitrate == own_rate)
2640 supp_rates |= BIT(j);
2646 static void ieee80211_rx_bss_info(struct net_device *dev,
2647 struct ieee80211_mgmt *mgmt,
2649 struct ieee80211_rx_status *rx_status,
2650 struct ieee802_11_elems *elems,
2653 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2655 struct ieee80211_sta_bss *bss;
2656 struct sta_info *sta;
2657 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2658 u64 beacon_timestamp, rx_timestamp;
2659 struct ieee80211_channel *channel;
2660 DECLARE_MAC_BUF(mac);
2661 DECLARE_MAC_BUF(mac2);
2663 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2664 return; /* ignore ProbeResp to foreign address */
2667 printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
2668 dev->name, beacon ? "Beacon" : "Probe Response",
2669 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
2672 beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2674 if (ieee80211_vif_is_mesh(&sdata->vif) && elems->mesh_id &&
2675 elems->mesh_config && mesh_matches_local(elems, dev)) {
2676 u64 rates = ieee80211_sta_get_rates(local, elems,
2679 mesh_neighbour_update(mgmt->sa, rates, dev,
2680 mesh_peer_accepts_plinks(elems, dev));
2685 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems->supp_rates &&
2686 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2687 (sta = sta_info_get(local, mgmt->sa))) {
2689 u64 supp_rates = ieee80211_sta_get_rates(local, elems,
2692 prev_rates = sta->supp_rates[rx_status->band];
2693 sta->supp_rates[rx_status->band] &= supp_rates;
2694 if (sta->supp_rates[rx_status->band] == 0) {
2695 /* No matching rates - this should not really happen.
2696 * Make sure that at least one rate is marked
2697 * supported to avoid issues with TX rate ctrl. */
2698 sta->supp_rates[rx_status->band] =
2699 sdata->u.sta.supp_rates_bits[rx_status->band];
2701 if (sta->supp_rates[rx_status->band] != prev_rates) {
2702 printk(KERN_DEBUG "%s: updated supp_rates set for "
2703 "%s based on beacon info (0x%llx & 0x%llx -> "
2705 dev->name, print_mac(mac, sta->addr),
2706 (unsigned long long) prev_rates,
2707 (unsigned long long) supp_rates,
2708 (unsigned long long) sta->supp_rates[rx_status->band]);
2714 if (elems->ds_params && elems->ds_params_len == 1)
2715 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
2717 freq = rx_status->freq;
2719 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2721 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2724 #ifdef CONFIG_MAC80211_MESH
2725 if (elems->mesh_config)
2726 bss = ieee80211_rx_mesh_bss_get(dev, elems->mesh_id,
2727 elems->mesh_id_len, elems->mesh_config, freq);
2730 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
2731 elems->ssid, elems->ssid_len);
2733 #ifdef CONFIG_MAC80211_MESH
2734 if (elems->mesh_config)
2735 bss = ieee80211_rx_mesh_bss_add(dev, elems->mesh_id,
2736 elems->mesh_id_len, elems->mesh_config,
2737 elems->mesh_config_len, freq);
2740 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2741 elems->ssid, elems->ssid_len);
2746 /* TODO: order by RSSI? */
2747 spin_lock_bh(&local->sta_bss_lock);
2748 list_move_tail(&bss->list, &local->sta_bss_list);
2749 spin_unlock_bh(&local->sta_bss_lock);
2753 /* save the ERP value so that it is available at association time */
2754 if (elems->erp_info && elems->erp_info_len >= 1) {
2755 bss->erp_value = elems->erp_info[0];
2756 bss->has_erp_value = 1;
2759 if (elems->ht_cap_elem &&
2760 (!bss->ht_ie || bss->ht_ie_len != elems->ht_cap_elem_len ||
2761 memcmp(bss->ht_ie, elems->ht_cap_elem, elems->ht_cap_elem_len))) {
2763 bss->ht_ie = kmalloc(elems->ht_cap_elem_len + 2, GFP_ATOMIC);
2765 memcpy(bss->ht_ie, elems->ht_cap_elem - 2,
2766 elems->ht_cap_elem_len + 2);
2767 bss->ht_ie_len = elems->ht_cap_elem_len + 2;
2770 } else if (!elems->ht_cap_elem && bss->ht_ie) {
2776 if (elems->ht_info_elem &&
2778 bss->ht_add_ie_len != elems->ht_info_elem_len ||
2779 memcmp(bss->ht_add_ie, elems->ht_info_elem,
2780 elems->ht_info_elem_len))) {
2781 kfree(bss->ht_add_ie);
2783 kmalloc(elems->ht_info_elem_len + 2, GFP_ATOMIC);
2784 if (bss->ht_add_ie) {
2785 memcpy(bss->ht_add_ie, elems->ht_info_elem - 2,
2786 elems->ht_info_elem_len + 2);
2787 bss->ht_add_ie_len = elems->ht_info_elem_len + 2;
2789 bss->ht_add_ie_len = 0;
2790 } else if (!elems->ht_info_elem && bss->ht_add_ie) {
2791 kfree(bss->ht_add_ie);
2792 bss->ht_add_ie = NULL;
2793 bss->ht_add_ie_len = 0;
2796 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2797 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2799 bss->supp_rates_len = 0;
2800 if (elems->supp_rates) {
2801 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2802 if (clen > elems->supp_rates_len)
2803 clen = elems->supp_rates_len;
2804 memcpy(&bss->supp_rates[bss->supp_rates_len], elems->supp_rates,
2806 bss->supp_rates_len += clen;
2808 if (elems->ext_supp_rates) {
2809 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2810 if (clen > elems->ext_supp_rates_len)
2811 clen = elems->ext_supp_rates_len;
2812 memcpy(&bss->supp_rates[bss->supp_rates_len],
2813 elems->ext_supp_rates, clen);
2814 bss->supp_rates_len += clen;
2817 bss->band = rx_status->band;
2819 bss->timestamp = beacon_timestamp;
2820 bss->last_update = jiffies;
2821 bss->signal = rx_status->signal;
2822 bss->noise = rx_status->noise;
2823 bss->qual = rx_status->qual;
2824 if (!beacon && !bss->probe_resp)
2825 bss->probe_resp = true;
2828 * In STA mode, the remaining parameters should not be overridden
2829 * by beacons because they're not necessarily accurate there.
2831 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2832 bss->probe_resp && beacon) {
2833 ieee80211_rx_bss_put(dev, bss);
2838 (!bss->wpa_ie || bss->wpa_ie_len != elems->wpa_len ||
2839 memcmp(bss->wpa_ie, elems->wpa, elems->wpa_len))) {
2841 bss->wpa_ie = kmalloc(elems->wpa_len + 2, GFP_ATOMIC);
2843 memcpy(bss->wpa_ie, elems->wpa - 2, elems->wpa_len + 2);
2844 bss->wpa_ie_len = elems->wpa_len + 2;
2846 bss->wpa_ie_len = 0;
2847 } else if (!elems->wpa && bss->wpa_ie) {
2850 bss->wpa_ie_len = 0;
2854 (!bss->rsn_ie || bss->rsn_ie_len != elems->rsn_len ||
2855 memcmp(bss->rsn_ie, elems->rsn, elems->rsn_len))) {
2857 bss->rsn_ie = kmalloc(elems->rsn_len + 2, GFP_ATOMIC);
2859 memcpy(bss->rsn_ie, elems->rsn - 2, elems->rsn_len + 2);
2860 bss->rsn_ie_len = elems->rsn_len + 2;
2862 bss->rsn_ie_len = 0;
2863 } else if (!elems->rsn && bss->rsn_ie) {
2866 bss->rsn_ie_len = 0;
2871 * http://www.wipo.int/pctdb/en/wo.jsp?wo=2007047181&IA=WO2007047181&DISPLAY=DESC
2875 * In particular, "Wi-Fi CERTIFIED for WMM - Support for Multimedia
2876 * Applications with Quality of Service in Wi-Fi Networks," Wi- Fi
2877 * Alliance (September 1, 2004) is incorporated by reference herein.
2878 * The inclusion of the WMM Parameters in probe responses and
2879 * association responses is mandatory for WMM enabled networks. The
2880 * inclusion of the WMM Parameters in beacons, however, is optional.
2883 if (elems->wmm_param &&
2884 (!bss->wmm_ie || bss->wmm_ie_len != elems->wmm_param_len ||
2885 memcmp(bss->wmm_ie, elems->wmm_param, elems->wmm_param_len))) {
2887 bss->wmm_ie = kmalloc(elems->wmm_param_len + 2, GFP_ATOMIC);
2889 memcpy(bss->wmm_ie, elems->wmm_param - 2,
2890 elems->wmm_param_len + 2);
2891 bss->wmm_ie_len = elems->wmm_param_len + 2;
2893 bss->wmm_ie_len = 0;
2894 } else if (elems->wmm_info &&
2895 (!bss->wmm_ie || bss->wmm_ie_len != elems->wmm_info_len ||
2896 memcmp(bss->wmm_ie, elems->wmm_info,
2897 elems->wmm_info_len))) {
2898 /* As for certain AP's Fifth bit is not set in WMM IE in
2899 * beacon frames.So while parsing the beacon frame the
2900 * wmm_info structure is used instead of wmm_param.
2901 * wmm_info structure was never used to set bss->wmm_ie.
2902 * This code fixes this problem by copying the WME
2903 * information from wmm_info to bss->wmm_ie and enabling
2904 * n-band association.
2907 bss->wmm_ie = kmalloc(elems->wmm_info_len + 2, GFP_ATOMIC);
2909 memcpy(bss->wmm_ie, elems->wmm_info - 2,
2910 elems->wmm_info_len + 2);
2911 bss->wmm_ie_len = elems->wmm_info_len + 2;
2913 bss->wmm_ie_len = 0;
2914 } else if (!elems->wmm_param && !elems->wmm_info && bss->wmm_ie) {
2917 bss->wmm_ie_len = 0;
2920 /* check if we need to merge IBSS */
2921 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2922 !local->sta_sw_scanning && !local->sta_hw_scanning &&
2923 bss->capability & WLAN_CAPABILITY_IBSS &&
2924 bss->freq == local->oper_channel->center_freq &&
2925 elems->ssid_len == sdata->u.sta.ssid_len &&
2926 memcmp(elems->ssid, sdata->u.sta.ssid,
2927 sdata->u.sta.ssid_len) == 0) {
2928 if (rx_status->flag & RX_FLAG_TSFT) {
2929 /* in order for correct IBSS merging we need mactime
2931 * since mactime is defined as the time the first data
2932 * symbol of the frame hits the PHY, and the timestamp
2933 * of the beacon is defined as "the time that the data
2934 * symbol containing the first bit of the timestamp is
2935 * transmitted to the PHY plus the transmitting STA’s
2936 * delays through its local PHY from the MAC-PHY
2937 * interface to its interface with the WM"
2938 * (802.11 11.1.2) - equals the time this bit arrives at
2939 * the receiver - we have to take into account the
2940 * offset between the two.
2941 * e.g: at 1 MBit that means mactime is 192 usec earlier
2942 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2944 int rate = local->hw.wiphy->bands[rx_status->band]->
2945 bitrates[rx_status->rate_idx].bitrate;
2946 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2947 } else if (local && local->ops && local->ops->get_tsf)
2948 /* second best option: get current TSF */
2949 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2951 /* can't merge without knowing the TSF */
2952 rx_timestamp = -1LLU;
2953 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2954 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2955 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2956 print_mac(mac, mgmt->sa),
2957 print_mac(mac2, mgmt->bssid),
2958 (unsigned long long)rx_timestamp,
2959 (unsigned long long)beacon_timestamp,
2960 (unsigned long long)(rx_timestamp - beacon_timestamp),
2962 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2963 if (beacon_timestamp > rx_timestamp) {
2964 #ifndef CONFIG_MAC80211_IBSS_DEBUG
2965 if (net_ratelimit())
2967 printk(KERN_DEBUG "%s: beacon TSF higher than "
2968 "local TSF - IBSS merge with BSSID %s\n",
2969 dev->name, print_mac(mac, mgmt->bssid));
2970 ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2971 ieee80211_ibss_add_sta(dev, NULL,
2972 mgmt->bssid, mgmt->sa,
2973 BIT(rx_status->rate_idx));
2977 ieee80211_rx_bss_put(dev, bss);
2981 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2982 struct ieee80211_mgmt *mgmt,
2984 struct ieee80211_rx_status *rx_status)
2987 struct ieee802_11_elems elems;
2989 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2993 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2996 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, &elems, 0);
3000 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
3001 struct ieee80211_mgmt *mgmt,
3003 struct ieee80211_rx_status *rx_status)
3005 struct ieee80211_sub_if_data *sdata;
3006 struct ieee80211_if_sta *ifsta;
3008 struct ieee802_11_elems elems;
3009 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3010 struct ieee80211_conf *conf = &local->hw.conf;
3013 /* Process beacon from the current BSS */
3014 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3018 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
3020 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, &elems, 1);
3022 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3023 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3025 ifsta = &sdata->u.sta;
3027 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
3028 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
3031 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
3032 elems.wmm_param_len);
3034 /* Do not send changes to driver if we are scanning. This removes
3035 * requirement that driver's bss_info_changed function needs to be
3037 if (local->sta_sw_scanning || local->sta_hw_scanning)
3040 if (elems.erp_info && elems.erp_info_len >= 1)
3041 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
3043 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
3044 changed |= ieee80211_handle_protect_preamb(sdata, false,
3045 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
3048 if (elems.ht_cap_elem && elems.ht_info_elem &&
3049 elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
3050 struct ieee80211_ht_bss_info bss_info;
3052 ieee80211_ht_addt_info_ie_to_ht_bss_info(
3053 (struct ieee80211_ht_addt_info *)
3054 elems.ht_info_elem, &bss_info);
3055 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
3059 ieee80211_bss_info_change_notify(sdata, changed);
3063 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
3064 struct ieee80211_if_sta *ifsta,
3065 struct ieee80211_mgmt *mgmt,
3067 struct ieee80211_rx_status *rx_status)
3069 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3070 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3072 struct sk_buff *skb;
3073 struct ieee80211_mgmt *resp;
3075 DECLARE_MAC_BUF(mac);
3076 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3077 DECLARE_MAC_BUF(mac2);
3078 DECLARE_MAC_BUF(mac3);
3081 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
3082 ifsta->state != IEEE80211_IBSS_JOINED ||
3083 len < 24 + 2 || !ifsta->probe_resp)
3086 if (local->ops->tx_last_beacon)
3087 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
3091 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3092 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
3093 "%s (tx_last_beacon=%d)\n",
3094 dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
3095 print_mac(mac3, mgmt->bssid), tx_last_beacon);
3096 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3098 if (!tx_last_beacon)
3101 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
3102 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
3105 end = ((u8 *) mgmt) + len;
3106 pos = mgmt->u.probe_req.variable;
3107 if (pos[0] != WLAN_EID_SSID ||
3108 pos + 2 + pos[1] > end) {
3109 if (net_ratelimit()) {
3110 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
3112 dev->name, print_mac(mac, mgmt->sa));
3117 (pos[1] != ifsta->ssid_len ||
3118 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
3119 /* Ignore ProbeReq for foreign SSID */
3123 /* Reply with ProbeResp */
3124 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
3128 resp = (struct ieee80211_mgmt *) skb->data;
3129 memcpy(resp->da, mgmt->sa, ETH_ALEN);
3130 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3131 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
3132 dev->name, print_mac(mac, resp->da));
3133 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3134 ieee80211_sta_tx(dev, skb, 0);
3137 static void ieee80211_rx_mgmt_action(struct net_device *dev,
3138 struct ieee80211_if_sta *ifsta,
3139 struct ieee80211_mgmt *mgmt,
3141 struct ieee80211_rx_status *rx_status)
3143 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3144 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3146 if (len < IEEE80211_MIN_ACTION_SIZE)
3149 switch (mgmt->u.action.category) {
3150 case WLAN_CATEGORY_SPECTRUM_MGMT:
3151 if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ)
3153 switch (mgmt->u.action.u.chan_switch.action_code) {
3154 case WLAN_ACTION_SPCT_MSR_REQ:
3155 if (len < (IEEE80211_MIN_ACTION_SIZE +
3156 sizeof(mgmt->u.action.u.measurement)))
3158 ieee80211_sta_process_measurement_req(dev, mgmt, len);
3162 case WLAN_CATEGORY_BACK:
3163 switch (mgmt->u.action.u.addba_req.action_code) {
3164 case WLAN_ACTION_ADDBA_REQ:
3165 if (len < (IEEE80211_MIN_ACTION_SIZE +
3166 sizeof(mgmt->u.action.u.addba_req)))
3168 ieee80211_sta_process_addba_request(dev, mgmt, len);
3170 case WLAN_ACTION_ADDBA_RESP:
3171 if (len < (IEEE80211_MIN_ACTION_SIZE +
3172 sizeof(mgmt->u.action.u.addba_resp)))
3174 ieee80211_sta_process_addba_resp(dev, mgmt, len);
3176 case WLAN_ACTION_DELBA:
3177 if (len < (IEEE80211_MIN_ACTION_SIZE +
3178 sizeof(mgmt->u.action.u.delba)))
3180 ieee80211_sta_process_delba(dev, mgmt, len);
3183 if (net_ratelimit())
3184 printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
3189 case PLINK_CATEGORY:
3190 if (ieee80211_vif_is_mesh(&sdata->vif))
3191 mesh_rx_plink_frame(dev, mgmt, len, rx_status);
3193 case MESH_PATH_SEL_CATEGORY:
3194 if (ieee80211_vif_is_mesh(&sdata->vif))
3195 mesh_rx_path_sel_frame(dev, mgmt, len);
3198 if (net_ratelimit())
3199 printk(KERN_DEBUG "%s: Rx unknown action frame - "
3200 "category=%d\n", dev->name, mgmt->u.action.category);
3205 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
3206 struct ieee80211_rx_status *rx_status)
3208 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3209 struct ieee80211_sub_if_data *sdata;
3210 struct ieee80211_if_sta *ifsta;
3211 struct ieee80211_mgmt *mgmt;
3217 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3218 ifsta = &sdata->u.sta;
3220 mgmt = (struct ieee80211_mgmt *) skb->data;
3221 fc = le16_to_cpu(mgmt->frame_control);
3223 switch (fc & IEEE80211_FCTL_STYPE) {
3224 case IEEE80211_STYPE_PROBE_REQ:
3225 case IEEE80211_STYPE_PROBE_RESP:
3226 case IEEE80211_STYPE_BEACON:
3227 case IEEE80211_STYPE_ACTION:
3228 memcpy(skb->cb, rx_status, sizeof(*rx_status));
3229 case IEEE80211_STYPE_AUTH:
3230 case IEEE80211_STYPE_ASSOC_RESP:
3231 case IEEE80211_STYPE_REASSOC_RESP:
3232 case IEEE80211_STYPE_DEAUTH:
3233 case IEEE80211_STYPE_DISASSOC:
3234 skb_queue_tail(&ifsta->skb_queue, skb);
3235 queue_work(local->hw.workqueue, &ifsta->work);
3238 printk(KERN_DEBUG "%s: received unknown management frame - "
3239 "stype=%d\n", dev->name,
3240 (fc & IEEE80211_FCTL_STYPE) >> 4);
3249 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
3250 struct sk_buff *skb)
3252 struct ieee80211_rx_status *rx_status;
3253 struct ieee80211_sub_if_data *sdata;
3254 struct ieee80211_if_sta *ifsta;
3255 struct ieee80211_mgmt *mgmt;
3258 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3259 ifsta = &sdata->u.sta;
3261 rx_status = (struct ieee80211_rx_status *) skb->cb;
3262 mgmt = (struct ieee80211_mgmt *) skb->data;
3263 fc = le16_to_cpu(mgmt->frame_control);
3265 switch (fc & IEEE80211_FCTL_STYPE) {
3266 case IEEE80211_STYPE_PROBE_REQ:
3267 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
3270 case IEEE80211_STYPE_PROBE_RESP:
3271 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
3273 case IEEE80211_STYPE_BEACON:
3274 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
3276 case IEEE80211_STYPE_AUTH:
3277 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
3279 case IEEE80211_STYPE_ASSOC_RESP:
3280 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
3282 case IEEE80211_STYPE_REASSOC_RESP:
3283 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
3285 case IEEE80211_STYPE_DEAUTH:
3286 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
3288 case IEEE80211_STYPE_DISASSOC:
3289 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
3291 case IEEE80211_STYPE_ACTION:
3292 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len, rx_status);
3301 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
3302 struct ieee80211_rx_status *rx_status)
3304 struct ieee80211_mgmt *mgmt;
3308 return RX_DROP_UNUSABLE;
3310 mgmt = (struct ieee80211_mgmt *) skb->data;
3311 fc = mgmt->frame_control;
3313 if (ieee80211_is_ctl(fc))
3317 return RX_DROP_MONITOR;
3319 if (ieee80211_is_probe_resp(fc)) {
3320 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
3325 if (ieee80211_is_beacon(fc)) {
3326 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
3335 static int ieee80211_sta_active_ibss(struct net_device *dev)
3337 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3339 struct sta_info *sta;
3340 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3344 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3345 if (sta->sdata == sdata &&
3346 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3359 static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time)
3361 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3362 struct sta_info *sta, *tmp;
3363 LIST_HEAD(tmp_list);
3364 DECLARE_MAC_BUF(mac);
3365 unsigned long flags;
3367 spin_lock_irqsave(&local->sta_lock, flags);
3368 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
3369 if (time_after(jiffies, sta->last_rx + exp_time)) {
3370 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
3371 dev->name, print_mac(mac, sta->addr));
3372 __sta_info_unlink(&sta);
3374 list_add(&sta->list, &tmp_list);
3376 spin_unlock_irqrestore(&local->sta_lock, flags);
3378 list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3379 sta_info_destroy(sta);
3383 static void ieee80211_sta_merge_ibss(struct net_device *dev,
3384 struct ieee80211_if_sta *ifsta)
3386 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3388 ieee80211_sta_expire(dev, IEEE80211_IBSS_INACTIVITY_LIMIT);
3389 if (ieee80211_sta_active_ibss(dev))
3392 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3393 "IBSS networks with same SSID (merge)\n", dev->name);
3394 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
3398 #ifdef CONFIG_MAC80211_MESH
3399 static void ieee80211_mesh_housekeeping(struct net_device *dev,
3400 struct ieee80211_if_sta *ifsta)
3402 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3405 ieee80211_sta_expire(dev, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3406 mesh_path_expire(dev);
3408 free_plinks = mesh_plink_availables(sdata);
3409 if (free_plinks != sdata->u.sta.accepting_plinks)
3410 ieee80211_if_config_beacon(dev);
3412 mod_timer(&ifsta->timer, jiffies +
3413 IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3417 void ieee80211_start_mesh(struct net_device *dev)
3419 struct ieee80211_if_sta *ifsta;
3420 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3421 ifsta = &sdata->u.sta;
3422 ifsta->state = IEEE80211_MESH_UP;
3423 ieee80211_sta_timer((unsigned long)sdata);
3428 void ieee80211_sta_timer(unsigned long data)
3430 struct ieee80211_sub_if_data *sdata =
3431 (struct ieee80211_sub_if_data *) data;
3432 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3433 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
3435 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3436 queue_work(local->hw.workqueue, &ifsta->work);
3439 void ieee80211_sta_work(struct work_struct *work)
3441 struct ieee80211_sub_if_data *sdata =
3442 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3443 struct net_device *dev = sdata->dev;
3444 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3445 struct ieee80211_if_sta *ifsta;
3446 struct sk_buff *skb;
3448 if (!netif_running(dev))
3451 if (local->sta_sw_scanning || local->sta_hw_scanning)
3454 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3455 sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3456 sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT) {
3457 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
3458 "(type=%d)\n", dev->name, sdata->vif.type);
3461 ifsta = &sdata->u.sta;
3463 while ((skb = skb_dequeue(&ifsta->skb_queue)))
3464 ieee80211_sta_rx_queued_mgmt(dev, skb);
3466 #ifdef CONFIG_MAC80211_MESH
3467 if (ifsta->preq_queue_len &&
3469 ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3470 mesh_path_start_discovery(dev);
3473 if (ifsta->state != IEEE80211_AUTHENTICATE &&
3474 ifsta->state != IEEE80211_ASSOCIATE &&
3475 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3476 if (ifsta->scan_ssid_len)
3477 ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
3479 ieee80211_sta_start_scan(dev, NULL, 0);
3483 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3484 if (ieee80211_sta_config_auth(dev, ifsta))
3486 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3487 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3490 switch (ifsta->state) {
3491 case IEEE80211_DISABLED:
3493 case IEEE80211_AUTHENTICATE:
3494 ieee80211_authenticate(dev, ifsta);
3496 case IEEE80211_ASSOCIATE:
3497 ieee80211_associate(dev, ifsta);
3499 case IEEE80211_ASSOCIATED:
3500 ieee80211_associated(dev, ifsta);
3502 case IEEE80211_IBSS_SEARCH:
3503 ieee80211_sta_find_ibss(dev, ifsta);
3505 case IEEE80211_IBSS_JOINED:
3506 ieee80211_sta_merge_ibss(dev, ifsta);
3508 #ifdef CONFIG_MAC80211_MESH
3509 case IEEE80211_MESH_UP:
3510 ieee80211_mesh_housekeeping(dev, ifsta);
3514 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
3519 if (ieee80211_privacy_mismatch(dev, ifsta)) {
3520 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3521 "mixed-cell disabled - disassociate\n", dev->name);
3523 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
3524 ieee80211_set_disassoc(dev, ifsta, 0);
3529 static void ieee80211_sta_reset_auth(struct net_device *dev,
3530 struct ieee80211_if_sta *ifsta)
3532 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3534 if (local->ops->reset_tsf) {
3535 /* Reset own TSF to allow time synchronization work. */
3536 local->ops->reset_tsf(local_to_hw(local));
3539 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3542 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3543 ifsta->auth_alg = WLAN_AUTH_OPEN;
3544 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3545 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3546 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3547 ifsta->auth_alg = WLAN_AUTH_LEAP;
3549 ifsta->auth_alg = WLAN_AUTH_OPEN;
3550 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
3552 ifsta->auth_transaction = -1;
3553 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3554 ifsta->auth_tries = ifsta->assoc_tries = 0;
3555 netif_carrier_off(dev);
3559 void ieee80211_sta_req_auth(struct net_device *dev,
3560 struct ieee80211_if_sta *ifsta)
3562 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3563 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3565 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3568 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3569 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3570 (ifsta->flags & (IEEE80211_STA_SSID_SET |
3571 IEEE80211_STA_AUTO_SSID_SEL))) {
3572 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3573 queue_work(local->hw.workqueue, &ifsta->work);
3577 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3578 const char *ssid, int ssid_len)
3580 int tmp, hidden_ssid;
3582 if (ssid_len == ifsta->ssid_len &&
3583 !memcmp(ifsta->ssid, ssid, ssid_len))
3586 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
3592 if (ssid[tmp] != '\0') {
3598 if (hidden_ssid && ifsta->ssid_len == ssid_len)
3601 if (ssid_len == 1 && ssid[0] == ' ')
3607 static int ieee80211_sta_config_auth(struct net_device *dev,
3608 struct ieee80211_if_sta *ifsta)
3610 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3611 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3612 struct ieee80211_sta_bss *bss, *selected = NULL;
3613 int top_rssi = 0, freq;
3615 spin_lock_bh(&local->sta_bss_lock);
3616 freq = local->oper_channel->center_freq;
3617 list_for_each_entry(bss, &local->sta_bss_list, list) {
3618 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3621 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3622 IEEE80211_STA_AUTO_BSSID_SEL |
3623 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
3624 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3625 !!sdata->default_key))
3628 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3632 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3633 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3636 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3637 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3640 if (!selected || top_rssi < bss->signal) {
3642 top_rssi = bss->signal;
3646 atomic_inc(&selected->users);
3647 spin_unlock_bh(&local->sta_bss_lock);
3650 ieee80211_set_freq(dev, selected->freq);
3651 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3652 ieee80211_sta_set_ssid(dev, selected->ssid,
3653 selected->ssid_len);
3654 ieee80211_sta_set_bssid(dev, selected->bssid);
3655 ieee80211_sta_def_wmm_params(dev, selected, 0);
3656 ieee80211_rx_bss_put(dev, selected);
3657 ifsta->state = IEEE80211_AUTHENTICATE;
3658 ieee80211_sta_reset_auth(dev, ifsta);
3661 if (ifsta->state != IEEE80211_AUTHENTICATE) {
3662 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3663 ieee80211_sta_start_scan(dev, NULL, 0);
3665 ieee80211_sta_start_scan(dev, ifsta->ssid,
3667 ifsta->state = IEEE80211_AUTHENTICATE;
3668 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3670 ifsta->state = IEEE80211_DISABLED;
3676 static int ieee80211_sta_create_ibss(struct net_device *dev,
3677 struct ieee80211_if_sta *ifsta)
3679 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3680 struct ieee80211_sta_bss *bss;
3681 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3682 struct ieee80211_supported_band *sband;
3683 u8 bssid[ETH_ALEN], *pos;
3686 DECLARE_MAC_BUF(mac);
3689 /* Easier testing, use fixed BSSID. */
3690 memset(bssid, 0xfe, ETH_ALEN);
3692 /* Generate random, not broadcast, locally administered BSSID. Mix in
3693 * own MAC address to make sure that devices that do not have proper
3694 * random number generator get different BSSID. */
3695 get_random_bytes(bssid, ETH_ALEN);
3696 for (i = 0; i < ETH_ALEN; i++)
3697 bssid[i] ^= dev->dev_addr[i];
3702 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3703 dev->name, print_mac(mac, bssid));
3705 bss = ieee80211_rx_bss_add(dev, bssid,
3706 local->hw.conf.channel->center_freq,
3707 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3711 bss->band = local->hw.conf.channel->band;
3712 sband = local->hw.wiphy->bands[bss->band];
3714 if (local->hw.conf.beacon_int == 0)
3715 local->hw.conf.beacon_int = 100;
3716 bss->beacon_int = local->hw.conf.beacon_int;
3717 bss->last_update = jiffies;
3718 bss->capability = WLAN_CAPABILITY_IBSS;
3720 if (sdata->default_key)
3721 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3723 sdata->drop_unencrypted = 0;
3725 bss->supp_rates_len = sband->n_bitrates;
3726 pos = bss->supp_rates;
3727 for (i = 0; i < sband->n_bitrates; i++) {
3728 int rate = sband->bitrates[i].bitrate;
3729 *pos++ = (u8) (rate / 5);
3732 ret = ieee80211_sta_join_ibss(dev, ifsta, bss);
3733 ieee80211_rx_bss_put(dev, bss);
3738 static int ieee80211_sta_find_ibss(struct net_device *dev,
3739 struct ieee80211_if_sta *ifsta)
3741 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3742 struct ieee80211_sta_bss *bss;
3746 DECLARE_MAC_BUF(mac);
3747 DECLARE_MAC_BUF(mac2);
3749 if (ifsta->ssid_len == 0)
3752 active_ibss = ieee80211_sta_active_ibss(dev);
3753 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3754 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3755 dev->name, active_ibss);
3756 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3757 spin_lock_bh(&local->sta_bss_lock);
3758 list_for_each_entry(bss, &local->sta_bss_list, list) {
3759 if (ifsta->ssid_len != bss->ssid_len ||
3760 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3761 || !(bss->capability & WLAN_CAPABILITY_IBSS))
3763 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3764 printk(KERN_DEBUG " bssid=%s found\n",
3765 print_mac(mac, bss->bssid));
3766 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3767 memcpy(bssid, bss->bssid, ETH_ALEN);
3769 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3772 spin_unlock_bh(&local->sta_bss_lock);
3774 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3775 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
3776 "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
3777 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3778 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
3779 (bss = ieee80211_rx_bss_get(dev, bssid,
3780 local->hw.conf.channel->center_freq,
3781 ifsta->ssid, ifsta->ssid_len))) {
3783 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3784 " based on configured SSID\n",
3785 dev->name, print_mac(mac, bssid));
3786 ret = ieee80211_sta_join_ibss(dev, ifsta, bss);
3787 ieee80211_rx_bss_put(dev, bss);
3790 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3791 printk(KERN_DEBUG " did not try to join ibss\n");
3792 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3794 /* Selected IBSS not found in current scan results - try to scan */
3795 if (ifsta->state == IEEE80211_IBSS_JOINED &&
3796 !ieee80211_sta_active_ibss(dev)) {
3797 mod_timer(&ifsta->timer, jiffies +
3798 IEEE80211_IBSS_MERGE_INTERVAL);
3799 } else if (time_after(jiffies, local->last_scan_completed +
3800 IEEE80211_SCAN_INTERVAL)) {
3801 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3802 "join\n", dev->name);
3803 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3805 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3806 int interval = IEEE80211_SCAN_INTERVAL;
3808 if (time_after(jiffies, ifsta->ibss_join_req +
3809 IEEE80211_IBSS_JOIN_TIMEOUT)) {
3810 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3811 (!(local->oper_channel->flags &
3812 IEEE80211_CHAN_NO_IBSS)))
3813 return ieee80211_sta_create_ibss(dev, ifsta);
3814 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3815 printk(KERN_DEBUG "%s: IBSS not allowed on"
3816 " %d MHz\n", dev->name,
3817 local->hw.conf.channel->center_freq);
3820 /* No IBSS found - decrease scan interval and continue
3822 interval = IEEE80211_SCAN_INTERVAL_SLOW;
3825 ifsta->state = IEEE80211_IBSS_SEARCH;
3826 mod_timer(&ifsta->timer, jiffies + interval);
3834 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3836 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3837 struct ieee80211_if_sta *ifsta;
3839 if (len > IEEE80211_MAX_SSID_LEN)
3842 ifsta = &sdata->u.sta;
3844 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3845 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3846 memcpy(ifsta->ssid, ssid, len);
3847 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3848 ifsta->ssid_len = len;
3851 ifsta->flags |= IEEE80211_STA_SSID_SET;
3853 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3854 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3855 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3856 ifsta->ibss_join_req = jiffies;
3857 ifsta->state = IEEE80211_IBSS_SEARCH;
3858 return ieee80211_sta_find_ibss(dev, ifsta);
3864 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3866 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3867 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3868 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3869 *len = ifsta->ssid_len;
3874 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3876 struct ieee80211_sub_if_data *sdata;
3877 struct ieee80211_if_sta *ifsta;
3880 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3881 ifsta = &sdata->u.sta;
3883 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3884 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3885 res = ieee80211_if_config(dev);
3887 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3888 "the low-level driver\n", dev->name);
3893 if (is_valid_ether_addr(bssid))
3894 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3896 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3902 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3903 struct ieee80211_sub_if_data *sdata,
3906 struct sk_buff *skb;
3907 struct ieee80211_hdr *nullfunc;
3910 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3912 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3913 "frame\n", sdata->dev->name);
3916 skb_reserve(skb, local->hw.extra_tx_headroom);
3918 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3919 memset(nullfunc, 0, 24);
3920 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3921 IEEE80211_FCTL_TODS);
3923 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
3924 nullfunc->frame_control = fc;
3925 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3926 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3927 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3929 ieee80211_sta_tx(sdata->dev, skb, 0);
3933 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3935 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3936 ieee80211_vif_is_mesh(&sdata->vif))
3937 ieee80211_sta_timer((unsigned long)sdata);
3940 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3942 struct ieee80211_local *local = hw_to_local(hw);
3943 struct net_device *dev = local->scan_dev;
3944 struct ieee80211_sub_if_data *sdata;
3945 union iwreq_data wrqu;
3947 local->last_scan_completed = jiffies;
3948 memset(&wrqu, 0, sizeof(wrqu));
3949 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3951 if (local->sta_hw_scanning) {
3952 local->sta_hw_scanning = 0;
3953 if (ieee80211_hw_config(local))
3954 printk(KERN_DEBUG "%s: failed to restore operational "
3955 "channel after scan\n", dev->name);
3956 /* Restart STA timer for HW scan case */
3958 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3959 ieee80211_restart_sta_timer(sdata);
3965 local->sta_sw_scanning = 0;
3966 if (ieee80211_hw_config(local))
3967 printk(KERN_DEBUG "%s: failed to restore operational "
3968 "channel after scan\n", dev->name);
3971 netif_tx_lock_bh(local->mdev);
3972 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3973 local->ops->configure_filter(local_to_hw(local),
3974 FIF_BCN_PRBRESP_PROMISC,
3975 &local->filter_flags,
3976 local->mdev->mc_count,
3977 local->mdev->mc_list);
3979 netif_tx_unlock_bh(local->mdev);
3982 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3984 /* No need to wake the master device. */
3985 if (sdata->dev == local->mdev)
3988 /* Tell AP we're back */
3989 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3990 sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3991 ieee80211_send_nullfunc(local, sdata, 0);
3993 ieee80211_restart_sta_timer(sdata);
3995 netif_wake_queue(sdata->dev);
4000 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4001 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
4002 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4003 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
4004 (!ifsta->state == IEEE80211_IBSS_JOINED &&
4005 !ieee80211_sta_active_ibss(dev)))
4006 ieee80211_sta_find_ibss(dev, ifsta);
4009 EXPORT_SYMBOL(ieee80211_scan_completed);
4011 void ieee80211_sta_scan_work(struct work_struct *work)
4013 struct ieee80211_local *local =
4014 container_of(work, struct ieee80211_local, scan_work.work);
4015 struct net_device *dev = local->scan_dev;
4016 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4017 struct ieee80211_supported_band *sband;
4018 struct ieee80211_channel *chan;
4020 unsigned long next_delay = 0;
4022 if (!local->sta_sw_scanning)
4025 switch (local->scan_state) {
4026 case SCAN_SET_CHANNEL:
4028 * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
4029 * after we successfully scanned the last channel of the last
4030 * band (and the last band is supported by the hw)
4032 if (local->scan_band < IEEE80211_NUM_BANDS)
4033 sband = local->hw.wiphy->bands[local->scan_band];
4038 * If we are at an unsupported band and have more bands
4039 * left to scan, advance to the next supported one.
4041 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
4043 sband = local->hw.wiphy->bands[local->scan_band];
4044 local->scan_channel_idx = 0;
4047 /* if no more bands/channels left, complete scan */
4048 if (!sband || local->scan_channel_idx >= sband->n_channels) {
4049 ieee80211_scan_completed(local_to_hw(local));
4053 chan = &sband->channels[local->scan_channel_idx];
4055 if (chan->flags & IEEE80211_CHAN_DISABLED ||
4056 (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
4057 chan->flags & IEEE80211_CHAN_NO_IBSS))
4061 local->scan_channel = chan;
4062 if (ieee80211_hw_config(local)) {
4063 printk(KERN_DEBUG "%s: failed to set freq to "
4064 "%d MHz for scan\n", dev->name,
4070 /* advance state machine to next channel/band */
4071 local->scan_channel_idx++;
4072 if (local->scan_channel_idx >= sband->n_channels) {
4074 * scan_band may end up == IEEE80211_NUM_BANDS, but
4075 * we'll catch that case above and complete the scan
4076 * if that is the case.
4079 local->scan_channel_idx = 0;
4085 next_delay = IEEE80211_PROBE_DELAY +
4086 usecs_to_jiffies(local->hw.channel_change_time);
4087 local->scan_state = SCAN_SEND_PROBE;
4089 case SCAN_SEND_PROBE:
4090 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
4091 local->scan_state = SCAN_SET_CHANNEL;
4093 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
4095 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
4096 local->scan_ssid_len);
4097 next_delay = IEEE80211_CHANNEL_TIME;
4101 if (local->sta_sw_scanning)
4102 queue_delayed_work(local->hw.workqueue, &local->scan_work,
4107 static int ieee80211_sta_start_scan(struct net_device *dev,
4108 u8 *ssid, size_t ssid_len)
4110 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4111 struct ieee80211_sub_if_data *sdata;
4113 if (ssid_len > IEEE80211_MAX_SSID_LEN)
4116 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
4117 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
4120 * ScanType: ACTIVE, PASSIVE
4121 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
4122 * a Probe frame during active scanning
4124 * MinChannelTime (>= ProbeDelay), in TU
4125 * MaxChannelTime: (>= MinChannelTime), in TU
4128 /* MLME-SCAN.confirm
4130 * ResultCode: SUCCESS, INVALID_PARAMETERS
4133 if (local->sta_sw_scanning || local->sta_hw_scanning) {
4134 if (local->scan_dev == dev)
4139 if (local->ops->hw_scan) {
4140 int rc = local->ops->hw_scan(local_to_hw(local),
4143 local->sta_hw_scanning = 1;
4144 local->scan_dev = dev;
4149 local->sta_sw_scanning = 1;
4152 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4154 /* Don't stop the master interface, otherwise we can't transmit
4156 if (sdata->dev == local->mdev)
4159 netif_stop_queue(sdata->dev);
4160 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
4161 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
4162 ieee80211_send_nullfunc(local, sdata, 1);
4167 local->scan_ssid_len = ssid_len;
4168 memcpy(local->scan_ssid, ssid, ssid_len);
4170 local->scan_ssid_len = 0;
4171 local->scan_state = SCAN_SET_CHANNEL;
4172 local->scan_channel_idx = 0;
4173 local->scan_band = IEEE80211_BAND_2GHZ;
4174 local->scan_dev = dev;
4176 netif_tx_lock_bh(local->mdev);
4177 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
4178 local->ops->configure_filter(local_to_hw(local),
4179 FIF_BCN_PRBRESP_PROMISC,
4180 &local->filter_flags,
4181 local->mdev->mc_count,
4182 local->mdev->mc_list);
4183 netif_tx_unlock_bh(local->mdev);
4185 /* TODO: start scan as soon as all nullfunc frames are ACKed */
4186 queue_delayed_work(local->hw.workqueue, &local->scan_work,
4187 IEEE80211_CHANNEL_TIME);
4193 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
4195 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4196 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4197 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4199 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4200 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
4202 if (local->sta_sw_scanning || local->sta_hw_scanning) {
4203 if (local->scan_dev == dev)
4208 ifsta->scan_ssid_len = ssid_len;
4210 memcpy(ifsta->scan_ssid, ssid, ssid_len);
4211 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
4212 queue_work(local->hw.workqueue, &ifsta->work);
4217 ieee80211_sta_scan_result(struct net_device *dev,
4218 struct iw_request_info *info,
4219 struct ieee80211_sta_bss *bss,
4220 char *current_ev, char *end_buf)
4222 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4223 struct iw_event iwe;
4225 if (time_after(jiffies,
4226 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
4229 memset(&iwe, 0, sizeof(iwe));
4230 iwe.cmd = SIOCGIWAP;
4231 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
4232 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
4233 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4236 memset(&iwe, 0, sizeof(iwe));
4237 iwe.cmd = SIOCGIWESSID;
4238 if (bss_mesh_cfg(bss)) {
4239 iwe.u.data.length = bss_mesh_id_len(bss);
4240 iwe.u.data.flags = 1;
4241 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4242 &iwe, bss_mesh_id(bss));
4244 iwe.u.data.length = bss->ssid_len;
4245 iwe.u.data.flags = 1;
4246 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4250 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
4251 || bss_mesh_cfg(bss)) {
4252 memset(&iwe, 0, sizeof(iwe));
4253 iwe.cmd = SIOCGIWMODE;
4254 if (bss_mesh_cfg(bss))
4255 iwe.u.mode = IW_MODE_MESH;
4256 else if (bss->capability & WLAN_CAPABILITY_ESS)
4257 iwe.u.mode = IW_MODE_MASTER;
4259 iwe.u.mode = IW_MODE_ADHOC;
4260 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
4261 &iwe, IW_EV_UINT_LEN);
4264 memset(&iwe, 0, sizeof(iwe));
4265 iwe.cmd = SIOCGIWFREQ;
4266 iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
4268 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4271 memset(&iwe, 0, sizeof(iwe));
4272 iwe.cmd = SIOCGIWFREQ;
4273 iwe.u.freq.m = bss->freq;
4275 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4277 memset(&iwe, 0, sizeof(iwe));
4279 iwe.u.qual.qual = bss->qual;
4280 iwe.u.qual.level = bss->signal;
4281 iwe.u.qual.noise = bss->noise;
4282 iwe.u.qual.updated = local->wstats_flags;
4283 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4286 memset(&iwe, 0, sizeof(iwe));
4287 iwe.cmd = SIOCGIWENCODE;
4288 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
4289 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4291 iwe.u.data.flags = IW_ENCODE_DISABLED;
4292 iwe.u.data.length = 0;
4293 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4296 if (bss && bss->wpa_ie) {
4297 memset(&iwe, 0, sizeof(iwe));
4298 iwe.cmd = IWEVGENIE;
4299 iwe.u.data.length = bss->wpa_ie_len;
4300 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4304 if (bss && bss->rsn_ie) {
4305 memset(&iwe, 0, sizeof(iwe));
4306 iwe.cmd = IWEVGENIE;
4307 iwe.u.data.length = bss->rsn_ie_len;
4308 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4312 if (bss && bss->ht_ie) {
4313 memset(&iwe, 0, sizeof(iwe));
4314 iwe.cmd = IWEVGENIE;
4315 iwe.u.data.length = bss->ht_ie_len;
4316 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4320 if (bss && bss->supp_rates_len > 0) {
4321 /* display all supported rates in readable format */
4322 char *p = current_ev + iwe_stream_lcp_len(info);
4325 memset(&iwe, 0, sizeof(iwe));
4326 iwe.cmd = SIOCGIWRATE;
4327 /* Those two flags are ignored... */
4328 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4330 for (i = 0; i < bss->supp_rates_len; i++) {
4331 iwe.u.bitrate.value = ((bss->supp_rates[i] &
4333 p = iwe_stream_add_value(info, current_ev, p,
4334 end_buf, &iwe, IW_EV_PARAM_LEN);
4341 buf = kmalloc(30, GFP_ATOMIC);
4343 memset(&iwe, 0, sizeof(iwe));
4344 iwe.cmd = IWEVCUSTOM;
4345 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4346 iwe.u.data.length = strlen(buf);
4347 current_ev = iwe_stream_add_point(info, current_ev,
4350 memset(&iwe, 0, sizeof(iwe));
4351 iwe.cmd = IWEVCUSTOM;
4352 sprintf(buf, " Last beacon: %dms ago",
4353 jiffies_to_msecs(jiffies - bss->last_update));
4354 iwe.u.data.length = strlen(buf);
4355 current_ev = iwe_stream_add_point(info, current_ev,
4356 end_buf, &iwe, buf);
4361 if (bss_mesh_cfg(bss)) {
4363 u8 *cfg = bss_mesh_cfg(bss);
4364 buf = kmalloc(50, GFP_ATOMIC);
4366 memset(&iwe, 0, sizeof(iwe));
4367 iwe.cmd = IWEVCUSTOM;
4368 sprintf(buf, "Mesh network (version %d)", cfg[0]);
4369 iwe.u.data.length = strlen(buf);
4370 current_ev = iwe_stream_add_point(info, current_ev,
4373 sprintf(buf, "Path Selection Protocol ID: "
4374 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4376 iwe.u.data.length = strlen(buf);
4377 current_ev = iwe_stream_add_point(info, current_ev,
4380 sprintf(buf, "Path Selection Metric ID: "
4381 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4383 iwe.u.data.length = strlen(buf);
4384 current_ev = iwe_stream_add_point(info, current_ev,
4387 sprintf(buf, "Congestion Control Mode ID: "
4388 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4390 iwe.u.data.length = strlen(buf);
4391 current_ev = iwe_stream_add_point(info, current_ev,
4394 sprintf(buf, "Channel Precedence: "
4395 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4397 iwe.u.data.length = strlen(buf);
4398 current_ev = iwe_stream_add_point(info, current_ev,
4409 int ieee80211_sta_scan_results(struct net_device *dev,
4410 struct iw_request_info *info,
4411 char *buf, size_t len)
4413 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4414 char *current_ev = buf;
4415 char *end_buf = buf + len;
4416 struct ieee80211_sta_bss *bss;
4418 spin_lock_bh(&local->sta_bss_lock);
4419 list_for_each_entry(bss, &local->sta_bss_list, list) {
4420 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4421 spin_unlock_bh(&local->sta_bss_lock);
4424 current_ev = ieee80211_sta_scan_result(dev, info, bss,
4425 current_ev, end_buf);
4427 spin_unlock_bh(&local->sta_bss_lock);
4428 return current_ev - buf;
4432 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
4434 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4435 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4437 kfree(ifsta->extra_ie);
4439 ifsta->extra_ie = NULL;
4440 ifsta->extra_ie_len = 0;
4443 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4444 if (!ifsta->extra_ie) {
4445 ifsta->extra_ie_len = 0;
4448 memcpy(ifsta->extra_ie, ie, len);
4449 ifsta->extra_ie_len = len;
4454 struct sta_info *ieee80211_ibss_add_sta(struct net_device *dev,
4455 struct sk_buff *skb, u8 *bssid,
4456 u8 *addr, u64 supp_rates)
4458 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4459 struct sta_info *sta;
4460 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4461 DECLARE_MAC_BUF(mac);
4462 int band = local->hw.conf.channel->band;
4464 /* TODO: Could consider removing the least recently used entry and
4465 * allow new one to be added. */
4466 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4467 if (net_ratelimit()) {
4468 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
4469 "entry %s\n", dev->name, print_mac(mac, addr));
4474 if (!ieee80211_bssid_match(bssid, sdata->u.sta.bssid))
4477 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
4478 wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
4480 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4484 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
4487 sta->supp_rates[band] = supp_rates;
4489 sta->supp_rates[band] = sdata->u.sta.supp_rates_bits[band];
4491 rate_control_rate_init(sta, local);
4493 if (sta_info_insert(sta))
4500 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
4502 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4503 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4505 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
4508 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4509 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
4512 ieee80211_send_deauth(dev, ifsta, reason);
4513 ieee80211_set_disassoc(dev, ifsta, 1);
4518 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
4520 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4521 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4523 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
4526 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4529 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
4532 ieee80211_send_disassoc(dev, ifsta, reason);
4533 ieee80211_set_disassoc(dev, ifsta, 0);
4537 void ieee80211_notify_mac(struct ieee80211_hw *hw,
4538 enum ieee80211_notification_types notif_type)
4540 struct ieee80211_local *local = hw_to_local(hw);
4541 struct ieee80211_sub_if_data *sdata;
4543 switch (notif_type) {
4544 case IEEE80211_NOTIFY_RE_ASSOC:
4546 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4548 if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
4549 ieee80211_sta_req_auth(sdata->dev,
4558 EXPORT_SYMBOL(ieee80211_notify_mac);