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_VERBOSE_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 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
375 if (net_ratelimit()) {
376 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
379 use_protection ? "enabled" : "disabled",
380 print_mac(mac, ifsta->bssid));
383 bss_conf->use_cts_prot = use_protection;
384 changed |= BSS_CHANGED_ERP_CTS_PROT;
387 if (use_short_preamble != bss_conf->use_short_preamble) {
388 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
389 if (net_ratelimit()) {
390 printk(KERN_DEBUG "%s: switched to %s barker preamble"
393 use_short_preamble ? "short" : "long",
394 print_mac(mac, ifsta->bssid));
397 bss_conf->use_short_preamble = use_short_preamble;
398 changed |= BSS_CHANGED_ERP_PREAMBLE;
404 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
407 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
408 bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
410 return ieee80211_handle_protect_preamb(sdata,
411 use_protection, use_short_preamble);
414 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
415 struct ieee80211_sta_bss *bss)
419 if (bss->has_erp_value)
420 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
422 u16 capab = bss->capability;
423 changed |= ieee80211_handle_protect_preamb(sdata, false,
424 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
430 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
431 struct ieee80211_ht_info *ht_info)
437 memset(ht_info, 0, sizeof(*ht_info));
440 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
442 ht_info->ht_supported = 1;
443 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
444 ht_info->ampdu_factor =
445 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
446 ht_info->ampdu_density =
447 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
448 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
450 ht_info->ht_supported = 0;
455 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
456 struct ieee80211_ht_addt_info *ht_add_info_ie,
457 struct ieee80211_ht_bss_info *bss_info)
459 if (bss_info == NULL)
462 memset(bss_info, 0, sizeof(*bss_info));
464 if (ht_add_info_ie) {
466 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
468 bss_info->primary_channel = ht_add_info_ie->control_chan;
469 bss_info->bss_cap = ht_add_info_ie->ht_param;
470 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
476 static void ieee80211_sta_send_associnfo(struct net_device *dev,
477 struct ieee80211_if_sta *ifsta)
482 union iwreq_data wrqu;
484 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
487 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
488 ifsta->assocresp_ies_len), GFP_KERNEL);
492 len = sprintf(buf, "ASSOCINFO(");
493 if (ifsta->assocreq_ies) {
494 len += sprintf(buf + len, "ReqIEs=");
495 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
496 len += sprintf(buf + len, "%02x",
497 ifsta->assocreq_ies[i]);
500 if (ifsta->assocresp_ies) {
501 if (ifsta->assocreq_ies)
502 len += sprintf(buf + len, " ");
503 len += sprintf(buf + len, "RespIEs=");
504 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
505 len += sprintf(buf + len, "%02x",
506 ifsta->assocresp_ies[i]);
509 len += sprintf(buf + len, ")");
511 if (len > IW_CUSTOM_MAX) {
512 len = sprintf(buf, "ASSOCRESPIE=");
513 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
514 len += sprintf(buf + len, "%02x",
515 ifsta->assocresp_ies[i]);
519 memset(&wrqu, 0, sizeof(wrqu));
520 wrqu.data.length = len;
521 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
527 static void ieee80211_set_associated(struct net_device *dev,
528 struct ieee80211_if_sta *ifsta,
531 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
532 struct ieee80211_local *local = sdata->local;
533 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
534 union iwreq_data wrqu;
535 u32 changed = BSS_CHANGED_ASSOC;
538 struct ieee80211_sta_bss *bss;
540 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
542 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
545 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
546 conf->channel->center_freq,
547 ifsta->ssid, ifsta->ssid_len);
549 /* set timing information */
550 sdata->bss_conf.beacon_int = bss->beacon_int;
551 sdata->bss_conf.timestamp = bss->timestamp;
553 changed |= ieee80211_handle_bss_capability(sdata, bss);
555 ieee80211_rx_bss_put(dev, bss);
558 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
559 changed |= BSS_CHANGED_HT;
560 sdata->bss_conf.assoc_ht = 1;
561 sdata->bss_conf.ht_conf = &conf->ht_conf;
562 sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
565 netif_carrier_on(dev);
566 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
567 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
568 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
569 ieee80211_sta_send_associnfo(dev, ifsta);
571 ieee80211_sta_tear_down_BA_sessions(dev, ifsta->bssid);
572 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
573 netif_carrier_off(dev);
574 ieee80211_reset_erp_info(dev);
576 sdata->bss_conf.assoc_ht = 0;
577 sdata->bss_conf.ht_conf = NULL;
578 sdata->bss_conf.ht_bss_conf = NULL;
580 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
582 ifsta->last_probe = jiffies;
583 ieee80211_led_assoc(local, assoc);
585 sdata->bss_conf.assoc = assoc;
586 ieee80211_bss_info_change_notify(sdata, changed);
587 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
588 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
591 static void ieee80211_set_disassoc(struct net_device *dev,
592 struct ieee80211_if_sta *ifsta, int deauth)
595 ifsta->auth_tries = 0;
596 ifsta->assoc_tries = 0;
597 ieee80211_set_associated(dev, ifsta, 0);
600 void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
603 struct ieee80211_sub_if_data *sdata;
604 struct ieee80211_tx_info *info;
606 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
607 skb->dev = sdata->local->mdev;
608 skb_set_mac_header(skb, 0);
609 skb_set_network_header(skb, 0);
610 skb_set_transport_header(skb, 0);
612 info = IEEE80211_SKB_CB(skb);
613 memset(info, 0, sizeof(struct ieee80211_tx_info));
614 info->control.ifindex = sdata->dev->ifindex;
616 info->flags |= IEEE80211_TX_CTL_DO_NOT_ENCRYPT;
622 static void ieee80211_send_auth(struct net_device *dev,
623 struct ieee80211_if_sta *ifsta,
624 int transaction, u8 *extra, size_t extra_len,
627 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
629 struct ieee80211_mgmt *mgmt;
631 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
632 sizeof(*mgmt) + 6 + extra_len);
634 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
635 "frame\n", dev->name);
638 skb_reserve(skb, local->hw.extra_tx_headroom);
640 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
641 memset(mgmt, 0, 24 + 6);
642 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
643 IEEE80211_STYPE_AUTH);
645 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
646 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
647 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
648 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
649 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
650 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
651 ifsta->auth_transaction = transaction + 1;
652 mgmt->u.auth.status_code = cpu_to_le16(0);
654 memcpy(skb_put(skb, extra_len), extra, extra_len);
656 ieee80211_sta_tx(dev, skb, encrypt);
660 static void ieee80211_authenticate(struct net_device *dev,
661 struct ieee80211_if_sta *ifsta)
663 DECLARE_MAC_BUF(mac);
666 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
667 printk(KERN_DEBUG "%s: authentication with AP %s"
669 dev->name, print_mac(mac, ifsta->bssid));
670 ifsta->state = IEEE80211_DISABLED;
674 ifsta->state = IEEE80211_AUTHENTICATE;
675 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
676 dev->name, print_mac(mac, ifsta->bssid));
678 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
680 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
683 static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss,
684 struct ieee80211_supported_band *sband,
690 for (i = 0; i < bss->supp_rates_len; i++) {
691 int rate = (bss->supp_rates[i] & 0x7F) * 5;
693 for (j = 0; j < sband->n_bitrates; j++)
694 if (sband->bitrates[j].bitrate == rate) {
704 static void ieee80211_send_assoc(struct net_device *dev,
705 struct ieee80211_if_sta *ifsta)
707 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
709 struct ieee80211_mgmt *mgmt;
711 int i, len, count, rates_len, supp_rates_len;
713 struct ieee80211_sta_bss *bss;
715 struct ieee80211_supported_band *sband;
718 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
719 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
722 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
723 "frame\n", dev->name);
726 skb_reserve(skb, local->hw.extra_tx_headroom);
728 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
730 capab = ifsta->capab;
732 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
733 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
734 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
735 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
736 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
739 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
740 local->hw.conf.channel->center_freq,
741 ifsta->ssid, ifsta->ssid_len);
743 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
744 capab |= WLAN_CAPABILITY_PRIVACY;
748 /* get all rates supported by the device and the AP as
749 * some APs don't like getting a superset of their rates
750 * in the association request (e.g. D-Link DAP 1353 in
752 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
754 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
755 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
756 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
758 ieee80211_rx_bss_put(dev, bss);
761 rates_len = sband->n_bitrates;
764 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
766 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
767 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
768 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
770 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
772 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
773 IEEE80211_STYPE_REASSOC_REQ);
774 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
775 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
776 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
780 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
781 IEEE80211_STYPE_ASSOC_REQ);
782 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
783 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
787 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
788 *pos++ = WLAN_EID_SSID;
789 *pos++ = ifsta->ssid_len;
790 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
792 /* add all rates which were marked to be used above */
793 supp_rates_len = rates_len;
794 if (supp_rates_len > 8)
797 len = sband->n_bitrates;
798 pos = skb_put(skb, supp_rates_len + 2);
799 *pos++ = WLAN_EID_SUPP_RATES;
800 *pos++ = supp_rates_len;
803 for (i = 0; i < sband->n_bitrates; i++) {
804 if (BIT(i) & rates) {
805 int rate = sband->bitrates[i].bitrate;
806 *pos++ = (u8) (rate / 5);
813 pos = skb_put(skb, rates_len - count + 2);
814 *pos++ = WLAN_EID_EXT_SUPP_RATES;
815 *pos++ = rates_len - count;
817 for (i++; i < sband->n_bitrates; i++) {
818 if (BIT(i) & rates) {
819 int rate = sband->bitrates[i].bitrate;
820 *pos++ = (u8) (rate / 5);
825 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
826 /* 1. power capabilities */
827 pos = skb_put(skb, 4);
828 *pos++ = WLAN_EID_PWR_CAPABILITY;
830 *pos++ = 0; /* min tx power */
831 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
833 /* 2. supported channels */
834 /* TODO: get this in reg domain format */
835 pos = skb_put(skb, 2 * sband->n_channels + 2);
836 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
837 *pos++ = 2 * sband->n_channels;
838 for (i = 0; i < sband->n_channels; i++) {
839 *pos++ = ieee80211_frequency_to_channel(
840 sband->channels[i].center_freq);
841 *pos++ = 1; /* one channel in the subband*/
845 if (ifsta->extra_ie) {
846 pos = skb_put(skb, ifsta->extra_ie_len);
847 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
850 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
851 pos = skb_put(skb, 9);
852 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
853 *pos++ = 7; /* len */
854 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
857 *pos++ = 2; /* WME */
858 *pos++ = 0; /* WME info */
859 *pos++ = 1; /* WME ver */
863 /* wmm support is a must to HT */
864 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
865 sband->ht_info.ht_supported && bss->ht_add_ie) {
866 struct ieee80211_ht_addt_info *ht_add_info =
867 (struct ieee80211_ht_addt_info *)bss->ht_add_ie;
868 u16 cap = sband->ht_info.cap;
870 u32 flags = local->hw.conf.channel->flags;
872 switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) {
873 case IEEE80211_HT_IE_CHA_SEC_ABOVE:
874 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
875 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
876 cap &= ~IEEE80211_HT_CAP_SGI_40;
879 case IEEE80211_HT_IE_CHA_SEC_BELOW:
880 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
881 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
882 cap &= ~IEEE80211_HT_CAP_SGI_40;
887 tmp = cpu_to_le16(cap);
888 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
889 *pos++ = WLAN_EID_HT_CAPABILITY;
890 *pos++ = sizeof(struct ieee80211_ht_cap);
891 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
892 memcpy(pos, &tmp, sizeof(u16));
894 /* TODO: needs a define here for << 2 */
895 *pos++ = sband->ht_info.ampdu_factor |
896 (sband->ht_info.ampdu_density << 2);
897 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
900 kfree(ifsta->assocreq_ies);
901 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
902 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
903 if (ifsta->assocreq_ies)
904 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
906 ieee80211_sta_tx(dev, skb, 0);
910 static void ieee80211_send_deauth(struct net_device *dev,
911 struct ieee80211_if_sta *ifsta, u16 reason)
913 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
915 struct ieee80211_mgmt *mgmt;
917 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
919 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
920 "frame\n", dev->name);
923 skb_reserve(skb, local->hw.extra_tx_headroom);
925 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
927 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
928 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
929 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
930 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
931 IEEE80211_STYPE_DEAUTH);
933 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
935 ieee80211_sta_tx(dev, skb, 0);
939 static void ieee80211_send_disassoc(struct net_device *dev,
940 struct ieee80211_if_sta *ifsta, u16 reason)
942 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
944 struct ieee80211_mgmt *mgmt;
946 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
948 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
949 "frame\n", dev->name);
952 skb_reserve(skb, local->hw.extra_tx_headroom);
954 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
956 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
957 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
958 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
959 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
960 IEEE80211_STYPE_DISASSOC);
962 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
964 ieee80211_sta_tx(dev, skb, 0);
968 static int ieee80211_privacy_mismatch(struct net_device *dev,
969 struct ieee80211_if_sta *ifsta)
971 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
972 struct ieee80211_sta_bss *bss;
977 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
980 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
981 local->hw.conf.channel->center_freq,
982 ifsta->ssid, ifsta->ssid_len);
986 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
987 wep_privacy = !!ieee80211_sta_wep_configured(dev);
988 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
990 ieee80211_rx_bss_put(dev, bss);
992 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
999 static void ieee80211_associate(struct net_device *dev,
1000 struct ieee80211_if_sta *ifsta)
1002 DECLARE_MAC_BUF(mac);
1004 ifsta->assoc_tries++;
1005 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
1006 printk(KERN_DEBUG "%s: association with AP %s"
1008 dev->name, print_mac(mac, ifsta->bssid));
1009 ifsta->state = IEEE80211_DISABLED;
1013 ifsta->state = IEEE80211_ASSOCIATE;
1014 printk(KERN_DEBUG "%s: associate with AP %s\n",
1015 dev->name, print_mac(mac, ifsta->bssid));
1016 if (ieee80211_privacy_mismatch(dev, ifsta)) {
1017 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
1018 "mixed-cell disabled - abort association\n", dev->name);
1019 ifsta->state = IEEE80211_DISABLED;
1023 ieee80211_send_assoc(dev, ifsta);
1025 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1029 static void ieee80211_associated(struct net_device *dev,
1030 struct ieee80211_if_sta *ifsta)
1032 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1033 struct sta_info *sta;
1035 DECLARE_MAC_BUF(mac);
1037 /* TODO: start monitoring current AP signal quality and number of
1038 * missed beacons. Scan other channels every now and then and search
1039 * for better APs. */
1040 /* TODO: remove expired BSSes */
1042 ifsta->state = IEEE80211_ASSOCIATED;
1046 sta = sta_info_get(local, ifsta->bssid);
1048 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
1049 dev->name, print_mac(mac, ifsta->bssid));
1053 if (time_after(jiffies,
1054 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
1055 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
1056 printk(KERN_DEBUG "%s: No ProbeResp from "
1057 "current AP %s - assume out of "
1059 dev->name, print_mac(mac, ifsta->bssid));
1061 sta_info_unlink(&sta);
1063 ieee80211_send_probe_req(dev, ifsta->bssid,
1065 local->scan_ssid_len);
1066 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
1068 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1069 if (time_after(jiffies, ifsta->last_probe +
1070 IEEE80211_PROBE_INTERVAL)) {
1071 ifsta->last_probe = jiffies;
1072 ieee80211_send_probe_req(dev, ifsta->bssid,
1081 if (disassoc && sta)
1082 sta_info_destroy(sta);
1085 ifsta->state = IEEE80211_DISABLED;
1086 ieee80211_set_associated(dev, ifsta, 0);
1088 mod_timer(&ifsta->timer, jiffies +
1089 IEEE80211_MONITORING_INTERVAL);
1094 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
1095 u8 *ssid, size_t ssid_len)
1097 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1098 struct ieee80211_supported_band *sband;
1099 struct sk_buff *skb;
1100 struct ieee80211_mgmt *mgmt;
1101 u8 *pos, *supp_rates, *esupp_rates = NULL;
1104 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
1106 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1107 "request\n", dev->name);
1110 skb_reserve(skb, local->hw.extra_tx_headroom);
1112 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1113 memset(mgmt, 0, 24);
1114 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1115 IEEE80211_STYPE_PROBE_REQ);
1116 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1118 memcpy(mgmt->da, dst, ETH_ALEN);
1119 memcpy(mgmt->bssid, dst, ETH_ALEN);
1121 memset(mgmt->da, 0xff, ETH_ALEN);
1122 memset(mgmt->bssid, 0xff, ETH_ALEN);
1124 pos = skb_put(skb, 2 + ssid_len);
1125 *pos++ = WLAN_EID_SSID;
1127 memcpy(pos, ssid, ssid_len);
1129 supp_rates = skb_put(skb, 2);
1130 supp_rates[0] = WLAN_EID_SUPP_RATES;
1132 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1134 for (i = 0; i < sband->n_bitrates; i++) {
1135 struct ieee80211_rate *rate = &sband->bitrates[i];
1137 pos = skb_put(skb, 1);
1139 } else if (supp_rates[1] == 8) {
1140 esupp_rates = skb_put(skb, 3);
1141 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1143 pos = &esupp_rates[2];
1145 pos = skb_put(skb, 1);
1148 *pos = rate->bitrate / 5;
1151 ieee80211_sta_tx(dev, skb, 0);
1155 static int ieee80211_sta_wep_configured(struct net_device *dev)
1157 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1158 if (!sdata || !sdata->default_key ||
1159 sdata->default_key->conf.alg != ALG_WEP)
1165 static void ieee80211_auth_completed(struct net_device *dev,
1166 struct ieee80211_if_sta *ifsta)
1168 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
1169 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1170 ieee80211_associate(dev, ifsta);
1174 static void ieee80211_auth_challenge(struct net_device *dev,
1175 struct ieee80211_if_sta *ifsta,
1176 struct ieee80211_mgmt *mgmt,
1180 struct ieee802_11_elems elems;
1182 pos = mgmt->u.auth.variable;
1183 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1184 if (!elems.challenge)
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 #ifdef CONFIG_MAC80211_HT_DEBUG
1368 if (net_ratelimit())
1369 printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1375 sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1376 sta_rx_agg_session_timer_expired;
1377 sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1378 (unsigned long)&sta->timer_to_tid[tid];
1379 init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1381 tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1383 /* prepare reordering buffer */
1384 tid_agg_rx->reorder_buf =
1385 kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC);
1386 if (!tid_agg_rx->reorder_buf) {
1387 #ifdef CONFIG_MAC80211_HT_DEBUG
1388 if (net_ratelimit())
1389 printk(KERN_ERR "can not allocate reordering buffer "
1390 "to tid %d\n", tid);
1392 kfree(sta->ampdu_mlme.tid_rx[tid]);
1395 memset(tid_agg_rx->reorder_buf, 0,
1396 buf_size * sizeof(struct sk_buff *));
1398 if (local->ops->ampdu_action)
1399 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1400 sta->addr, tid, &start_seq_num);
1401 #ifdef CONFIG_MAC80211_HT_DEBUG
1402 printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
1403 #endif /* CONFIG_MAC80211_HT_DEBUG */
1406 kfree(tid_agg_rx->reorder_buf);
1408 sta->ampdu_mlme.tid_rx[tid] = NULL;
1412 /* change state and send addba resp */
1413 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
1414 tid_agg_rx->dialog_token = dialog_token;
1415 tid_agg_rx->ssn = start_seq_num;
1416 tid_agg_rx->head_seq_num = start_seq_num;
1417 tid_agg_rx->buf_size = buf_size;
1418 tid_agg_rx->timeout = timeout;
1419 tid_agg_rx->stored_mpdu_num = 0;
1420 status = WLAN_STATUS_SUCCESS;
1422 spin_unlock_bh(&sta->lock);
1425 ieee80211_send_addba_resp(sta->sdata->dev, sta->addr, tid,
1426 dialog_token, status, 1, buf_size, timeout);
1430 static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1431 struct ieee80211_mgmt *mgmt,
1434 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1435 struct ieee80211_hw *hw = &local->hw;
1436 struct sta_info *sta;
1443 sta = sta_info_get(local, mgmt->sa);
1449 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1450 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1452 state = &sta->ampdu_mlme.tid_state_tx[tid];
1454 spin_lock_bh(&sta->lock);
1456 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1457 spin_unlock_bh(&sta->lock);
1458 goto addba_resp_exit;
1461 if (mgmt->u.action.u.addba_resp.dialog_token !=
1462 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
1463 spin_unlock_bh(&sta->lock);
1464 #ifdef CONFIG_MAC80211_HT_DEBUG
1465 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1466 #endif /* CONFIG_MAC80211_HT_DEBUG */
1467 goto addba_resp_exit;
1470 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
1471 #ifdef CONFIG_MAC80211_HT_DEBUG
1472 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1473 #endif /* CONFIG_MAC80211_HT_DEBUG */
1474 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1475 == WLAN_STATUS_SUCCESS) {
1476 *state |= HT_ADDBA_RECEIVED_MSK;
1477 sta->ampdu_mlme.addba_req_num[tid] = 0;
1479 if (*state == HT_AGG_STATE_OPERATIONAL)
1480 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1482 spin_unlock_bh(&sta->lock);
1484 sta->ampdu_mlme.addba_req_num[tid]++;
1485 /* this will allow the state check in stop_BA_session */
1486 *state = HT_AGG_STATE_OPERATIONAL;
1487 spin_unlock_bh(&sta->lock);
1488 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1489 WLAN_BACK_INITIATOR);
1496 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1497 u16 initiator, u16 reason_code)
1499 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1500 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1501 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1502 struct sk_buff *skb;
1503 struct ieee80211_mgmt *mgmt;
1506 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1509 printk(KERN_ERR "%s: failed to allocate buffer "
1510 "for delba frame\n", dev->name);
1514 skb_reserve(skb, local->hw.extra_tx_headroom);
1515 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1516 memset(mgmt, 0, 24);
1517 memcpy(mgmt->da, da, ETH_ALEN);
1518 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1519 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1520 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1522 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1523 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1524 IEEE80211_STYPE_ACTION);
1526 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1528 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1529 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1530 params = (u16)(initiator << 11); /* bit 11 initiator */
1531 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1533 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1534 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1536 ieee80211_sta_tx(dev, skb, 0);
1539 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1540 u16 initiator, u16 reason)
1542 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1543 struct ieee80211_hw *hw = &local->hw;
1544 struct sta_info *sta;
1546 DECLARE_MAC_BUF(mac);
1550 sta = sta_info_get(local, ra);
1556 /* check if TID is in operational state */
1557 spin_lock_bh(&sta->lock);
1558 if (sta->ampdu_mlme.tid_state_rx[tid]
1559 != HT_AGG_STATE_OPERATIONAL) {
1560 spin_unlock_bh(&sta->lock);
1564 sta->ampdu_mlme.tid_state_rx[tid] =
1565 HT_AGG_STATE_REQ_STOP_BA_MSK |
1566 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1567 spin_unlock_bh(&sta->lock);
1569 /* stop HW Rx aggregation. ampdu_action existence
1570 * already verified in session init so we add the BUG_ON */
1571 BUG_ON(!local->ops->ampdu_action);
1573 #ifdef CONFIG_MAC80211_HT_DEBUG
1574 printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n",
1575 print_mac(mac, ra), tid);
1576 #endif /* CONFIG_MAC80211_HT_DEBUG */
1578 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1581 printk(KERN_DEBUG "HW problem - can not stop rx "
1582 "aggregation for tid %d\n", tid);
1584 /* shutdown timer has not expired */
1585 if (initiator != WLAN_BACK_TIMER)
1586 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1588 /* check if this is a self generated aggregation halt */
1589 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1590 ieee80211_send_delba(dev, ra, tid, 0, reason);
1592 /* free the reordering buffer */
1593 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1594 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
1595 /* release the reordered frames */
1596 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1597 sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1598 sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
1601 /* free resources */
1602 kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1603 kfree(sta->ampdu_mlme.tid_rx[tid]);
1604 sta->ampdu_mlme.tid_rx[tid] = NULL;
1605 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
1611 static void ieee80211_sta_process_delba(struct net_device *dev,
1612 struct ieee80211_mgmt *mgmt, size_t len)
1614 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1615 struct sta_info *sta;
1618 DECLARE_MAC_BUF(mac);
1622 sta = sta_info_get(local, mgmt->sa);
1628 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1629 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1630 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1632 #ifdef CONFIG_MAC80211_HT_DEBUG
1633 if (net_ratelimit())
1634 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1635 print_mac(mac, mgmt->sa),
1636 initiator ? "initiator" : "recipient", tid,
1637 mgmt->u.action.u.delba.reason_code);
1638 #endif /* CONFIG_MAC80211_HT_DEBUG */
1640 if (initiator == WLAN_BACK_INITIATOR)
1641 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1642 WLAN_BACK_INITIATOR, 0);
1643 else { /* WLAN_BACK_RECIPIENT */
1644 spin_lock_bh(&sta->lock);
1645 sta->ampdu_mlme.tid_state_tx[tid] =
1646 HT_AGG_STATE_OPERATIONAL;
1647 spin_unlock_bh(&sta->lock);
1648 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1649 WLAN_BACK_RECIPIENT);
1655 * After sending add Block Ack request we activated a timer until
1656 * add Block Ack response will arrive from the recipient.
1657 * If this timer expires sta_addba_resp_timer_expired will be executed.
1659 void sta_addba_resp_timer_expired(unsigned long data)
1661 /* not an elegant detour, but there is no choice as the timer passes
1662 * only one argument, and both sta_info and TID are needed, so init
1663 * flow in sta_info_create gives the TID as data, while the timer_to_id
1664 * array gives the sta through container_of */
1665 u16 tid = *(u8 *)data;
1666 struct sta_info *temp_sta = container_of((void *)data,
1667 struct sta_info, timer_to_tid[tid]);
1669 struct ieee80211_local *local = temp_sta->local;
1670 struct ieee80211_hw *hw = &local->hw;
1671 struct sta_info *sta;
1676 sta = sta_info_get(local, temp_sta->addr);
1682 state = &sta->ampdu_mlme.tid_state_tx[tid];
1683 /* check if the TID waits for addBA response */
1684 spin_lock_bh(&sta->lock);
1685 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1686 spin_unlock_bh(&sta->lock);
1687 *state = HT_AGG_STATE_IDLE;
1688 #ifdef CONFIG_MAC80211_HT_DEBUG
1689 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1690 "expecting addBA response there", tid);
1692 goto timer_expired_exit;
1695 #ifdef CONFIG_MAC80211_HT_DEBUG
1696 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1699 /* go through the state check in stop_BA_session */
1700 *state = HT_AGG_STATE_OPERATIONAL;
1701 spin_unlock_bh(&sta->lock);
1702 ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1703 WLAN_BACK_INITIATOR);
1710 * After accepting the AddBA Request we activated a timer,
1711 * resetting it after each frame that arrives from the originator.
1712 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1714 static void sta_rx_agg_session_timer_expired(unsigned long data)
1716 /* not an elegant detour, but there is no choice as the timer passes
1717 * only one argument, and various sta_info are needed here, so init
1718 * flow in sta_info_create gives the TID as data, while the timer_to_id
1719 * array gives the sta through container_of */
1720 u8 *ptid = (u8 *)data;
1721 u8 *timer_to_id = ptid - *ptid;
1722 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1725 #ifdef CONFIG_MAC80211_HT_DEBUG
1726 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)
1828 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1829 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1832 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1833 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1836 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1837 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1838 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1840 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1842 * IEEE 802.11 standard does not require authentication in IBSS
1843 * networks and most implementations do not seem to use it.
1844 * However, try to reply to authentication attempts if someone
1845 * has actually implemented this.
1847 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
1849 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1852 if (auth_alg != ifsta->auth_alg ||
1853 auth_transaction != ifsta->auth_transaction)
1856 if (status_code != WLAN_STATUS_SUCCESS) {
1857 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1859 const int num_algs = ARRAY_SIZE(algs);
1861 algs[0] = algs[1] = algs[2] = 0xff;
1862 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1863 algs[0] = WLAN_AUTH_OPEN;
1864 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1865 algs[1] = WLAN_AUTH_SHARED_KEY;
1866 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1867 algs[2] = WLAN_AUTH_LEAP;
1868 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1870 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1874 for (i = 0; i < num_algs; i++) {
1876 if (pos >= num_algs)
1878 if (algs[pos] == ifsta->auth_alg ||
1881 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1882 !ieee80211_sta_wep_configured(dev))
1884 ifsta->auth_alg = algs[pos];
1891 switch (ifsta->auth_alg) {
1892 case WLAN_AUTH_OPEN:
1893 case WLAN_AUTH_LEAP:
1894 ieee80211_auth_completed(dev, ifsta);
1896 case WLAN_AUTH_SHARED_KEY:
1897 if (ifsta->auth_transaction == 4)
1898 ieee80211_auth_completed(dev, ifsta);
1900 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1906 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1907 struct ieee80211_if_sta *ifsta,
1908 struct ieee80211_mgmt *mgmt,
1912 DECLARE_MAC_BUF(mac);
1917 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1920 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1922 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
1923 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1925 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1926 ifsta->state == IEEE80211_ASSOCIATE ||
1927 ifsta->state == IEEE80211_ASSOCIATED) {
1928 ifsta->state = IEEE80211_AUTHENTICATE;
1929 mod_timer(&ifsta->timer, jiffies +
1930 IEEE80211_RETRY_AUTH_INTERVAL);
1933 ieee80211_set_disassoc(dev, ifsta, 1);
1934 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1938 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1939 struct ieee80211_if_sta *ifsta,
1940 struct ieee80211_mgmt *mgmt,
1944 DECLARE_MAC_BUF(mac);
1949 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1952 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1954 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1955 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1957 if (ifsta->state == IEEE80211_ASSOCIATED) {
1958 ifsta->state = IEEE80211_ASSOCIATE;
1959 mod_timer(&ifsta->timer, jiffies +
1960 IEEE80211_RETRY_AUTH_INTERVAL);
1963 ieee80211_set_disassoc(dev, ifsta, 0);
1967 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1968 struct ieee80211_if_sta *ifsta,
1969 struct ieee80211_mgmt *mgmt,
1973 struct ieee80211_local *local = sdata->local;
1974 struct net_device *dev = sdata->dev;
1975 struct ieee80211_supported_band *sband;
1976 struct sta_info *sta;
1977 u64 rates, basic_rates;
1978 u16 capab_info, status_code, aid;
1979 struct ieee802_11_elems elems;
1980 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1983 DECLARE_MAC_BUF(mac);
1984 bool have_higher_than_11mbit = false;
1986 /* AssocResp and ReassocResp have identical structure, so process both
1987 * of them in this function. */
1989 if (ifsta->state != IEEE80211_ASSOCIATE)
1995 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1998 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1999 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2000 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2002 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
2003 "status=%d aid=%d)\n",
2004 dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
2005 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2007 if (status_code != WLAN_STATUS_SUCCESS) {
2008 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
2009 dev->name, status_code);
2010 /* if this was a reassociation, ensure we try a "full"
2011 * association next time. This works around some broken APs
2012 * which do not correctly reject reassociation requests. */
2013 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2017 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2018 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
2019 "set\n", dev->name, aid);
2020 aid &= ~(BIT(15) | BIT(14));
2022 pos = mgmt->u.assoc_resp.variable;
2023 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2025 if (!elems.supp_rates) {
2026 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
2031 printk(KERN_DEBUG "%s: associated\n", dev->name);
2033 ifsta->ap_capab = capab_info;
2035 kfree(ifsta->assocresp_ies);
2036 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
2037 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
2038 if (ifsta->assocresp_ies)
2039 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
2043 /* Add STA entry for the AP */
2044 sta = sta_info_get(local, ifsta->bssid);
2046 struct ieee80211_sta_bss *bss;
2049 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
2051 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
2052 " the AP\n", dev->name);
2056 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
2057 local->hw.conf.channel->center_freq,
2058 ifsta->ssid, ifsta->ssid_len);
2060 sta->last_signal = bss->signal;
2061 sta->last_qual = bss->qual;
2062 sta->last_noise = bss->noise;
2063 ieee80211_rx_bss_put(dev, bss);
2066 err = sta_info_insert(sta);
2068 printk(KERN_DEBUG "%s: failed to insert STA entry for"
2069 " the AP (error %d)\n", dev->name, err);
2076 * FIXME: Do we really need to update the sta_info's information here?
2077 * We already know about the AP (we found it in our list) so it
2078 * should already be filled with the right info, no?
2079 * As is stands, all this is racy because typically we assume
2080 * the information that is filled in here (except flags) doesn't
2081 * change while a STA structure is alive. As such, it should move
2082 * to between the sta_info_alloc() and sta_info_insert() above.
2085 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
2086 WLAN_STA_AUTHORIZED);
2090 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2092 for (i = 0; i < elems.supp_rates_len; i++) {
2093 int rate = (elems.supp_rates[i] & 0x7f) * 5;
2096 have_higher_than_11mbit = true;
2098 for (j = 0; j < sband->n_bitrates; j++) {
2099 if (sband->bitrates[j].bitrate == rate)
2101 if (elems.supp_rates[i] & 0x80)
2102 basic_rates |= BIT(j);
2106 for (i = 0; i < elems.ext_supp_rates_len; i++) {
2107 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
2110 have_higher_than_11mbit = true;
2112 for (j = 0; j < sband->n_bitrates; j++) {
2113 if (sband->bitrates[j].bitrate == rate)
2115 if (elems.ext_supp_rates[i] & 0x80)
2116 basic_rates |= BIT(j);
2120 sta->supp_rates[local->hw.conf.channel->band] = rates;
2121 sdata->basic_rates = basic_rates;
2123 /* cf. IEEE 802.11 9.2.12 */
2124 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2125 have_higher_than_11mbit)
2126 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2128 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
2130 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
2131 (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2132 struct ieee80211_ht_bss_info bss_info;
2133 ieee80211_ht_cap_ie_to_ht_info(
2134 (struct ieee80211_ht_cap *)
2135 elems.ht_cap_elem, &sta->ht_info);
2136 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2137 (struct ieee80211_ht_addt_info *)
2138 elems.ht_info_elem, &bss_info);
2139 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
2142 rate_control_rate_init(sta, local);
2144 if (elems.wmm_param) {
2145 set_sta_flags(sta, WLAN_STA_WME);
2147 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2148 elems.wmm_param_len);
2152 /* set AID and assoc capability,
2153 * ieee80211_set_associated() will tell the driver */
2154 bss_conf->aid = aid;
2155 bss_conf->assoc_capability = capab_info;
2156 ieee80211_set_associated(dev, ifsta, 1);
2158 ieee80211_associated(dev, ifsta);
2162 /* Caller must hold local->sta_bss_lock */
2163 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
2164 struct ieee80211_sta_bss *bss)
2166 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2169 if (bss_mesh_cfg(bss))
2170 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2171 bss_mesh_id_len(bss));
2173 hash_idx = STA_HASH(bss->bssid);
2175 bss->hnext = local->sta_bss_hash[hash_idx];
2176 local->sta_bss_hash[hash_idx] = bss;
2180 /* Caller must hold local->sta_bss_lock */
2181 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
2182 struct ieee80211_sta_bss *bss)
2184 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2185 struct ieee80211_sta_bss *b, *prev = NULL;
2186 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2190 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2193 prev->hnext = bss->hnext;
2202 static struct ieee80211_sta_bss *
2203 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
2204 u8 *ssid, u8 ssid_len)
2206 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2207 struct ieee80211_sta_bss *bss;
2209 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2212 atomic_inc(&bss->users);
2213 atomic_inc(&bss->users);
2214 memcpy(bss->bssid, bssid, ETH_ALEN);
2216 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2217 memcpy(bss->ssid, ssid, ssid_len);
2218 bss->ssid_len = ssid_len;
2221 spin_lock_bh(&local->sta_bss_lock);
2222 /* TODO: order by RSSI? */
2223 list_add_tail(&bss->list, &local->sta_bss_list);
2224 __ieee80211_rx_bss_hash_add(dev, bss);
2225 spin_unlock_bh(&local->sta_bss_lock);
2229 static struct ieee80211_sta_bss *
2230 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
2231 u8 *ssid, u8 ssid_len)
2233 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2234 struct ieee80211_sta_bss *bss;
2236 spin_lock_bh(&local->sta_bss_lock);
2237 bss = local->sta_bss_hash[STA_HASH(bssid)];
2239 if (!bss_mesh_cfg(bss) &&
2240 !memcmp(bss->bssid, bssid, ETH_ALEN) &&
2241 bss->freq == freq &&
2242 bss->ssid_len == ssid_len &&
2243 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
2244 atomic_inc(&bss->users);
2249 spin_unlock_bh(&local->sta_bss_lock);
2253 #ifdef CONFIG_MAC80211_MESH
2254 static struct ieee80211_sta_bss *
2255 ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2256 u8 *mesh_cfg, int freq)
2258 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2259 struct ieee80211_sta_bss *bss;
2261 spin_lock_bh(&local->sta_bss_lock);
2262 bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2264 if (bss_mesh_cfg(bss) &&
2265 !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
2266 bss->freq == freq &&
2267 mesh_id_len == bss->mesh_id_len &&
2268 (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2270 atomic_inc(&bss->users);
2275 spin_unlock_bh(&local->sta_bss_lock);
2279 static struct ieee80211_sta_bss *
2280 ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2281 u8 *mesh_cfg, int mesh_config_len, int freq)
2283 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2284 struct ieee80211_sta_bss *bss;
2286 if (mesh_config_len != MESH_CFG_LEN)
2289 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2293 bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
2294 if (!bss->mesh_cfg) {
2299 if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2300 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2301 if (!bss->mesh_id) {
2302 kfree(bss->mesh_cfg);
2306 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2309 atomic_inc(&bss->users);
2310 atomic_inc(&bss->users);
2311 memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
2312 bss->mesh_id_len = mesh_id_len;
2314 spin_lock_bh(&local->sta_bss_lock);
2315 /* TODO: order by RSSI? */
2316 list_add_tail(&bss->list, &local->sta_bss_list);
2317 __ieee80211_rx_bss_hash_add(dev, bss);
2318 spin_unlock_bh(&local->sta_bss_lock);
2323 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2329 kfree(bss->ht_add_ie);
2330 kfree(bss_mesh_id(bss));
2331 kfree(bss_mesh_cfg(bss));
2336 static void ieee80211_rx_bss_put(struct net_device *dev,
2337 struct ieee80211_sta_bss *bss)
2339 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2342 if (!atomic_dec_and_lock(&bss->users, &local->sta_bss_lock)) {
2347 __ieee80211_rx_bss_hash_del(dev, bss);
2348 list_del(&bss->list);
2349 spin_unlock_bh(&local->sta_bss_lock);
2350 ieee80211_rx_bss_free(bss);
2354 void ieee80211_rx_bss_list_init(struct net_device *dev)
2356 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2357 spin_lock_init(&local->sta_bss_lock);
2358 INIT_LIST_HEAD(&local->sta_bss_list);
2362 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2364 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2365 struct ieee80211_sta_bss *bss, *tmp;
2367 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2368 ieee80211_rx_bss_put(dev, bss);
2372 static int ieee80211_sta_join_ibss(struct net_device *dev,
2373 struct ieee80211_if_sta *ifsta,
2374 struct ieee80211_sta_bss *bss)
2376 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2377 int res, rates, i, j;
2378 struct sk_buff *skb;
2379 struct ieee80211_mgmt *mgmt;
2380 struct ieee80211_tx_info *control;
2381 struct rate_selection ratesel;
2383 struct ieee80211_sub_if_data *sdata;
2384 struct ieee80211_supported_band *sband;
2385 union iwreq_data wrqu;
2387 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2389 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2391 /* Remove possible STA entries from other IBSS networks. */
2392 sta_info_flush_delayed(sdata);
2394 if (local->ops->reset_tsf) {
2395 /* Reset own TSF to allow time synchronization work. */
2396 local->ops->reset_tsf(local_to_hw(local));
2398 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2399 res = ieee80211_if_config(dev);
2403 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2405 sdata->drop_unencrypted = bss->capability &
2406 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2408 res = ieee80211_set_freq(dev, bss->freq);
2413 /* Set beacon template */
2414 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2419 skb_reserve(skb, local->hw.extra_tx_headroom);
2421 mgmt = (struct ieee80211_mgmt *)
2422 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2423 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2424 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2425 IEEE80211_STYPE_BEACON);
2426 memset(mgmt->da, 0xff, ETH_ALEN);
2427 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2428 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2429 mgmt->u.beacon.beacon_int =
2430 cpu_to_le16(local->hw.conf.beacon_int);
2431 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
2432 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2434 pos = skb_put(skb, 2 + ifsta->ssid_len);
2435 *pos++ = WLAN_EID_SSID;
2436 *pos++ = ifsta->ssid_len;
2437 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2439 rates = bss->supp_rates_len;
2442 pos = skb_put(skb, 2 + rates);
2443 *pos++ = WLAN_EID_SUPP_RATES;
2445 memcpy(pos, bss->supp_rates, rates);
2447 if (bss->band == IEEE80211_BAND_2GHZ) {
2448 pos = skb_put(skb, 2 + 1);
2449 *pos++ = WLAN_EID_DS_PARAMS;
2451 *pos++ = ieee80211_frequency_to_channel(bss->freq);
2454 pos = skb_put(skb, 2 + 2);
2455 *pos++ = WLAN_EID_IBSS_PARAMS;
2457 /* FIX: set ATIM window based on scan results */
2461 if (bss->supp_rates_len > 8) {
2462 rates = bss->supp_rates_len - 8;
2463 pos = skb_put(skb, 2 + rates);
2464 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2466 memcpy(pos, &bss->supp_rates[8], rates);
2469 control = IEEE80211_SKB_CB(skb);
2471 rate_control_get_rate(dev, sband, skb, &ratesel);
2472 if (ratesel.rate_idx < 0) {
2473 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2474 "for IBSS beacon\n", dev->name);
2477 control->control.vif = &sdata->vif;
2478 control->tx_rate_idx = ratesel.rate_idx;
2479 if (sdata->bss_conf.use_short_preamble &&
2480 sband->bitrates[ratesel.rate_idx].flags & IEEE80211_RATE_SHORT_PREAMBLE)
2481 control->flags |= IEEE80211_TX_CTL_SHORT_PREAMBLE;
2482 control->antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2483 control->flags |= IEEE80211_TX_CTL_NO_ACK;
2484 control->flags |= IEEE80211_TX_CTL_DO_NOT_ENCRYPT;
2485 control->control.retry_limit = 1;
2487 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2488 if (ifsta->probe_resp) {
2489 mgmt = (struct ieee80211_mgmt *)
2490 ifsta->probe_resp->data;
2491 mgmt->frame_control =
2492 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2493 IEEE80211_STYPE_PROBE_RESP);
2495 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2496 "template for IBSS\n", dev->name);
2499 if (local->ops->beacon_update &&
2500 local->ops->beacon_update(local_to_hw(local), skb) == 0) {
2501 printk(KERN_DEBUG "%s: Configured IBSS beacon "
2502 "template\n", dev->name);
2507 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2508 for (i = 0; i < bss->supp_rates_len; i++) {
2509 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2510 for (j = 0; j < sband->n_bitrates; j++)
2511 if (sband->bitrates[j].bitrate == bitrate)
2514 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2516 ieee80211_sta_def_wmm_params(dev, bss, 1);
2520 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2521 "template\n", dev->name);
2525 ifsta->state = IEEE80211_IBSS_JOINED;
2526 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2528 memset(&wrqu, 0, sizeof(wrqu));
2529 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
2530 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
2535 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2536 struct ieee802_11_elems *elems,
2537 enum ieee80211_band band)
2539 struct ieee80211_supported_band *sband;
2540 struct ieee80211_rate *bitrates;
2544 sband = local->hw.wiphy->bands[band];
2548 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2551 bitrates = sband->bitrates;
2552 num_rates = sband->n_bitrates;
2554 for (i = 0; i < elems->supp_rates_len +
2555 elems->ext_supp_rates_len; i++) {
2558 if (i < elems->supp_rates_len)
2559 rate = elems->supp_rates[i];
2560 else if (elems->ext_supp_rates)
2561 rate = elems->ext_supp_rates
2562 [i - elems->supp_rates_len];
2563 own_rate = 5 * (rate & 0x7f);
2564 for (j = 0; j < num_rates; j++)
2565 if (bitrates[j].bitrate == own_rate)
2566 supp_rates |= BIT(j);
2572 static void ieee80211_rx_bss_info(struct net_device *dev,
2573 struct ieee80211_mgmt *mgmt,
2575 struct ieee80211_rx_status *rx_status,
2576 struct ieee802_11_elems *elems,
2579 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2581 struct ieee80211_sta_bss *bss;
2582 struct sta_info *sta;
2583 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2584 u64 beacon_timestamp, rx_timestamp;
2585 struct ieee80211_channel *channel;
2586 DECLARE_MAC_BUF(mac);
2587 DECLARE_MAC_BUF(mac2);
2589 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2590 return; /* ignore ProbeResp to foreign address */
2592 beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2594 if (ieee80211_vif_is_mesh(&sdata->vif) && elems->mesh_id &&
2595 elems->mesh_config && mesh_matches_local(elems, dev)) {
2596 u64 rates = ieee80211_sta_get_rates(local, elems,
2599 mesh_neighbour_update(mgmt->sa, rates, dev,
2600 mesh_peer_accepts_plinks(elems, dev));
2605 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems->supp_rates &&
2606 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2607 (sta = sta_info_get(local, mgmt->sa))) {
2609 u64 supp_rates = ieee80211_sta_get_rates(local, elems,
2612 prev_rates = sta->supp_rates[rx_status->band];
2613 sta->supp_rates[rx_status->band] &= supp_rates;
2614 if (sta->supp_rates[rx_status->band] == 0) {
2615 /* No matching rates - this should not really happen.
2616 * Make sure that at least one rate is marked
2617 * supported to avoid issues with TX rate ctrl. */
2618 sta->supp_rates[rx_status->band] =
2619 sdata->u.sta.supp_rates_bits[rx_status->band];
2625 if (elems->ds_params && elems->ds_params_len == 1)
2626 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
2628 freq = rx_status->freq;
2630 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2632 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2635 #ifdef CONFIG_MAC80211_MESH
2636 if (elems->mesh_config)
2637 bss = ieee80211_rx_mesh_bss_get(dev, elems->mesh_id,
2638 elems->mesh_id_len, elems->mesh_config, freq);
2641 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
2642 elems->ssid, elems->ssid_len);
2644 #ifdef CONFIG_MAC80211_MESH
2645 if (elems->mesh_config)
2646 bss = ieee80211_rx_mesh_bss_add(dev, elems->mesh_id,
2647 elems->mesh_id_len, elems->mesh_config,
2648 elems->mesh_config_len, freq);
2651 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2652 elems->ssid, elems->ssid_len);
2657 /* TODO: order by RSSI? */
2658 spin_lock_bh(&local->sta_bss_lock);
2659 list_move_tail(&bss->list, &local->sta_bss_list);
2660 spin_unlock_bh(&local->sta_bss_lock);
2664 /* save the ERP value so that it is available at association time */
2665 if (elems->erp_info && elems->erp_info_len >= 1) {
2666 bss->erp_value = elems->erp_info[0];
2667 bss->has_erp_value = 1;
2670 if (elems->ht_cap_elem &&
2671 (!bss->ht_ie || bss->ht_ie_len != elems->ht_cap_elem_len ||
2672 memcmp(bss->ht_ie, elems->ht_cap_elem, elems->ht_cap_elem_len))) {
2674 bss->ht_ie = kmalloc(elems->ht_cap_elem_len + 2, GFP_ATOMIC);
2676 memcpy(bss->ht_ie, elems->ht_cap_elem - 2,
2677 elems->ht_cap_elem_len + 2);
2678 bss->ht_ie_len = elems->ht_cap_elem_len + 2;
2681 } else if (!elems->ht_cap_elem && bss->ht_ie) {
2687 if (elems->ht_info_elem &&
2689 bss->ht_add_ie_len != elems->ht_info_elem_len ||
2690 memcmp(bss->ht_add_ie, elems->ht_info_elem,
2691 elems->ht_info_elem_len))) {
2692 kfree(bss->ht_add_ie);
2694 kmalloc(elems->ht_info_elem_len + 2, GFP_ATOMIC);
2695 if (bss->ht_add_ie) {
2696 memcpy(bss->ht_add_ie, elems->ht_info_elem - 2,
2697 elems->ht_info_elem_len + 2);
2698 bss->ht_add_ie_len = elems->ht_info_elem_len + 2;
2700 bss->ht_add_ie_len = 0;
2701 } else if (!elems->ht_info_elem && bss->ht_add_ie) {
2702 kfree(bss->ht_add_ie);
2703 bss->ht_add_ie = NULL;
2704 bss->ht_add_ie_len = 0;
2707 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2708 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2710 bss->supp_rates_len = 0;
2711 if (elems->supp_rates) {
2712 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2713 if (clen > elems->supp_rates_len)
2714 clen = elems->supp_rates_len;
2715 memcpy(&bss->supp_rates[bss->supp_rates_len], elems->supp_rates,
2717 bss->supp_rates_len += clen;
2719 if (elems->ext_supp_rates) {
2720 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2721 if (clen > elems->ext_supp_rates_len)
2722 clen = elems->ext_supp_rates_len;
2723 memcpy(&bss->supp_rates[bss->supp_rates_len],
2724 elems->ext_supp_rates, clen);
2725 bss->supp_rates_len += clen;
2728 bss->band = rx_status->band;
2730 bss->timestamp = beacon_timestamp;
2731 bss->last_update = jiffies;
2732 bss->signal = rx_status->signal;
2733 bss->noise = rx_status->noise;
2734 bss->qual = rx_status->qual;
2735 if (!beacon && !bss->probe_resp)
2736 bss->probe_resp = true;
2739 * In STA mode, the remaining parameters should not be overridden
2740 * by beacons because they're not necessarily accurate there.
2742 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2743 bss->probe_resp && beacon) {
2744 ieee80211_rx_bss_put(dev, bss);
2749 (!bss->wpa_ie || bss->wpa_ie_len != elems->wpa_len ||
2750 memcmp(bss->wpa_ie, elems->wpa, elems->wpa_len))) {
2752 bss->wpa_ie = kmalloc(elems->wpa_len + 2, GFP_ATOMIC);
2754 memcpy(bss->wpa_ie, elems->wpa - 2, elems->wpa_len + 2);
2755 bss->wpa_ie_len = elems->wpa_len + 2;
2757 bss->wpa_ie_len = 0;
2758 } else if (!elems->wpa && bss->wpa_ie) {
2761 bss->wpa_ie_len = 0;
2765 (!bss->rsn_ie || bss->rsn_ie_len != elems->rsn_len ||
2766 memcmp(bss->rsn_ie, elems->rsn, elems->rsn_len))) {
2768 bss->rsn_ie = kmalloc(elems->rsn_len + 2, GFP_ATOMIC);
2770 memcpy(bss->rsn_ie, elems->rsn - 2, elems->rsn_len + 2);
2771 bss->rsn_ie_len = elems->rsn_len + 2;
2773 bss->rsn_ie_len = 0;
2774 } else if (!elems->rsn && bss->rsn_ie) {
2777 bss->rsn_ie_len = 0;
2782 * http://www.wipo.int/pctdb/en/wo.jsp?wo=2007047181&IA=WO2007047181&DISPLAY=DESC
2786 * In particular, "Wi-Fi CERTIFIED for WMM - Support for Multimedia
2787 * Applications with Quality of Service in Wi-Fi Networks," Wi- Fi
2788 * Alliance (September 1, 2004) is incorporated by reference herein.
2789 * The inclusion of the WMM Parameters in probe responses and
2790 * association responses is mandatory for WMM enabled networks. The
2791 * inclusion of the WMM Parameters in beacons, however, is optional.
2794 if (elems->wmm_param &&
2795 (!bss->wmm_ie || bss->wmm_ie_len != elems->wmm_param_len ||
2796 memcmp(bss->wmm_ie, elems->wmm_param, elems->wmm_param_len))) {
2798 bss->wmm_ie = kmalloc(elems->wmm_param_len + 2, GFP_ATOMIC);
2800 memcpy(bss->wmm_ie, elems->wmm_param - 2,
2801 elems->wmm_param_len + 2);
2802 bss->wmm_ie_len = elems->wmm_param_len + 2;
2804 bss->wmm_ie_len = 0;
2805 } else if (elems->wmm_info &&
2806 (!bss->wmm_ie || bss->wmm_ie_len != elems->wmm_info_len ||
2807 memcmp(bss->wmm_ie, elems->wmm_info,
2808 elems->wmm_info_len))) {
2809 /* As for certain AP's Fifth bit is not set in WMM IE in
2810 * beacon frames.So while parsing the beacon frame the
2811 * wmm_info structure is used instead of wmm_param.
2812 * wmm_info structure was never used to set bss->wmm_ie.
2813 * This code fixes this problem by copying the WME
2814 * information from wmm_info to bss->wmm_ie and enabling
2815 * n-band association.
2818 bss->wmm_ie = kmalloc(elems->wmm_info_len + 2, GFP_ATOMIC);
2820 memcpy(bss->wmm_ie, elems->wmm_info - 2,
2821 elems->wmm_info_len + 2);
2822 bss->wmm_ie_len = elems->wmm_info_len + 2;
2824 bss->wmm_ie_len = 0;
2825 } else if (!elems->wmm_param && !elems->wmm_info && bss->wmm_ie) {
2828 bss->wmm_ie_len = 0;
2831 /* check if we need to merge IBSS */
2832 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2833 !local->sta_sw_scanning && !local->sta_hw_scanning &&
2834 bss->capability & WLAN_CAPABILITY_IBSS &&
2835 bss->freq == local->oper_channel->center_freq &&
2836 elems->ssid_len == sdata->u.sta.ssid_len &&
2837 memcmp(elems->ssid, sdata->u.sta.ssid,
2838 sdata->u.sta.ssid_len) == 0) {
2839 if (rx_status->flag & RX_FLAG_TSFT) {
2840 /* in order for correct IBSS merging we need mactime
2842 * since mactime is defined as the time the first data
2843 * symbol of the frame hits the PHY, and the timestamp
2844 * of the beacon is defined as "the time that the data
2845 * symbol containing the first bit of the timestamp is
2846 * transmitted to the PHY plus the transmitting STA’s
2847 * delays through its local PHY from the MAC-PHY
2848 * interface to its interface with the WM"
2849 * (802.11 11.1.2) - equals the time this bit arrives at
2850 * the receiver - we have to take into account the
2851 * offset between the two.
2852 * e.g: at 1 MBit that means mactime is 192 usec earlier
2853 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2855 int rate = local->hw.wiphy->bands[rx_status->band]->
2856 bitrates[rx_status->rate_idx].bitrate;
2857 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2858 } else if (local && local->ops && local->ops->get_tsf)
2859 /* second best option: get current TSF */
2860 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2862 /* can't merge without knowing the TSF */
2863 rx_timestamp = -1LLU;
2864 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2865 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2866 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2867 print_mac(mac, mgmt->sa),
2868 print_mac(mac2, mgmt->bssid),
2869 (unsigned long long)rx_timestamp,
2870 (unsigned long long)beacon_timestamp,
2871 (unsigned long long)(rx_timestamp - beacon_timestamp),
2873 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2874 if (beacon_timestamp > rx_timestamp) {
2875 #ifndef CONFIG_MAC80211_IBSS_DEBUG
2876 printk(KERN_DEBUG "%s: beacon TSF higher than "
2877 "local TSF - IBSS merge with BSSID %s\n",
2878 dev->name, print_mac(mac, mgmt->bssid));
2880 ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2881 ieee80211_ibss_add_sta(dev, NULL,
2882 mgmt->bssid, mgmt->sa,
2883 BIT(rx_status->rate_idx));
2887 ieee80211_rx_bss_put(dev, bss);
2891 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2892 struct ieee80211_mgmt *mgmt,
2894 struct ieee80211_rx_status *rx_status)
2897 struct ieee802_11_elems elems;
2899 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2903 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2906 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, &elems, 0);
2910 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2911 struct ieee80211_mgmt *mgmt,
2913 struct ieee80211_rx_status *rx_status)
2915 struct ieee80211_sub_if_data *sdata;
2916 struct ieee80211_if_sta *ifsta;
2918 struct ieee802_11_elems elems;
2919 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2920 struct ieee80211_conf *conf = &local->hw.conf;
2923 /* Process beacon from the current BSS */
2924 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2928 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2930 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, &elems, 1);
2932 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2933 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2935 ifsta = &sdata->u.sta;
2937 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2938 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2941 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2942 elems.wmm_param_len);
2944 /* Do not send changes to driver if we are scanning. This removes
2945 * requirement that driver's bss_info_changed function needs to be
2947 if (local->sta_sw_scanning || local->sta_hw_scanning)
2950 if (elems.erp_info && elems.erp_info_len >= 1)
2951 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2953 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
2954 changed |= ieee80211_handle_protect_preamb(sdata, false,
2955 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
2958 if (elems.ht_cap_elem && elems.ht_info_elem &&
2959 elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2960 struct ieee80211_ht_bss_info bss_info;
2962 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2963 (struct ieee80211_ht_addt_info *)
2964 elems.ht_info_elem, &bss_info);
2965 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2969 ieee80211_bss_info_change_notify(sdata, changed);
2973 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2974 struct ieee80211_if_sta *ifsta,
2975 struct ieee80211_mgmt *mgmt,
2977 struct ieee80211_rx_status *rx_status)
2979 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2980 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2982 struct sk_buff *skb;
2983 struct ieee80211_mgmt *resp;
2985 DECLARE_MAC_BUF(mac);
2986 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2987 DECLARE_MAC_BUF(mac2);
2988 DECLARE_MAC_BUF(mac3);
2991 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2992 ifsta->state != IEEE80211_IBSS_JOINED ||
2993 len < 24 + 2 || !ifsta->probe_resp)
2996 if (local->ops->tx_last_beacon)
2997 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
3001 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3002 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
3003 "%s (tx_last_beacon=%d)\n",
3004 dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
3005 print_mac(mac3, mgmt->bssid), tx_last_beacon);
3006 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3008 if (!tx_last_beacon)
3011 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
3012 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
3015 end = ((u8 *) mgmt) + len;
3016 pos = mgmt->u.probe_req.variable;
3017 if (pos[0] != WLAN_EID_SSID ||
3018 pos + 2 + pos[1] > end) {
3019 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3020 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
3022 dev->name, print_mac(mac, mgmt->sa));
3027 (pos[1] != ifsta->ssid_len ||
3028 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
3029 /* Ignore ProbeReq for foreign SSID */
3033 /* Reply with ProbeResp */
3034 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
3038 resp = (struct ieee80211_mgmt *) skb->data;
3039 memcpy(resp->da, mgmt->sa, ETH_ALEN);
3040 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3041 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
3042 dev->name, print_mac(mac, resp->da));
3043 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3044 ieee80211_sta_tx(dev, skb, 0);
3047 static void ieee80211_rx_mgmt_action(struct net_device *dev,
3048 struct ieee80211_if_sta *ifsta,
3049 struct ieee80211_mgmt *mgmt,
3051 struct ieee80211_rx_status *rx_status)
3053 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3054 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3056 if (len < IEEE80211_MIN_ACTION_SIZE)
3059 switch (mgmt->u.action.category) {
3060 case WLAN_CATEGORY_SPECTRUM_MGMT:
3061 if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ)
3063 switch (mgmt->u.action.u.chan_switch.action_code) {
3064 case WLAN_ACTION_SPCT_MSR_REQ:
3065 if (len < (IEEE80211_MIN_ACTION_SIZE +
3066 sizeof(mgmt->u.action.u.measurement)))
3068 ieee80211_sta_process_measurement_req(dev, mgmt, len);
3072 case WLAN_CATEGORY_BACK:
3073 switch (mgmt->u.action.u.addba_req.action_code) {
3074 case WLAN_ACTION_ADDBA_REQ:
3075 if (len < (IEEE80211_MIN_ACTION_SIZE +
3076 sizeof(mgmt->u.action.u.addba_req)))
3078 ieee80211_sta_process_addba_request(dev, mgmt, len);
3080 case WLAN_ACTION_ADDBA_RESP:
3081 if (len < (IEEE80211_MIN_ACTION_SIZE +
3082 sizeof(mgmt->u.action.u.addba_resp)))
3084 ieee80211_sta_process_addba_resp(dev, mgmt, len);
3086 case WLAN_ACTION_DELBA:
3087 if (len < (IEEE80211_MIN_ACTION_SIZE +
3088 sizeof(mgmt->u.action.u.delba)))
3090 ieee80211_sta_process_delba(dev, mgmt, len);
3094 case PLINK_CATEGORY:
3095 if (ieee80211_vif_is_mesh(&sdata->vif))
3096 mesh_rx_plink_frame(dev, mgmt, len, rx_status);
3098 case MESH_PATH_SEL_CATEGORY:
3099 if (ieee80211_vif_is_mesh(&sdata->vif))
3100 mesh_rx_path_sel_frame(dev, mgmt, len);
3105 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
3106 struct ieee80211_rx_status *rx_status)
3108 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3109 struct ieee80211_sub_if_data *sdata;
3110 struct ieee80211_if_sta *ifsta;
3111 struct ieee80211_mgmt *mgmt;
3117 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3118 ifsta = &sdata->u.sta;
3120 mgmt = (struct ieee80211_mgmt *) skb->data;
3121 fc = le16_to_cpu(mgmt->frame_control);
3123 switch (fc & IEEE80211_FCTL_STYPE) {
3124 case IEEE80211_STYPE_PROBE_REQ:
3125 case IEEE80211_STYPE_PROBE_RESP:
3126 case IEEE80211_STYPE_BEACON:
3127 case IEEE80211_STYPE_ACTION:
3128 memcpy(skb->cb, rx_status, sizeof(*rx_status));
3129 case IEEE80211_STYPE_AUTH:
3130 case IEEE80211_STYPE_ASSOC_RESP:
3131 case IEEE80211_STYPE_REASSOC_RESP:
3132 case IEEE80211_STYPE_DEAUTH:
3133 case IEEE80211_STYPE_DISASSOC:
3134 skb_queue_tail(&ifsta->skb_queue, skb);
3135 queue_work(local->hw.workqueue, &ifsta->work);
3144 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
3145 struct sk_buff *skb)
3147 struct ieee80211_rx_status *rx_status;
3148 struct ieee80211_sub_if_data *sdata;
3149 struct ieee80211_if_sta *ifsta;
3150 struct ieee80211_mgmt *mgmt;
3153 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3154 ifsta = &sdata->u.sta;
3156 rx_status = (struct ieee80211_rx_status *) skb->cb;
3157 mgmt = (struct ieee80211_mgmt *) skb->data;
3158 fc = le16_to_cpu(mgmt->frame_control);
3160 switch (fc & IEEE80211_FCTL_STYPE) {
3161 case IEEE80211_STYPE_PROBE_REQ:
3162 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
3165 case IEEE80211_STYPE_PROBE_RESP:
3166 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
3168 case IEEE80211_STYPE_BEACON:
3169 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
3171 case IEEE80211_STYPE_AUTH:
3172 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
3174 case IEEE80211_STYPE_ASSOC_RESP:
3175 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
3177 case IEEE80211_STYPE_REASSOC_RESP:
3178 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
3180 case IEEE80211_STYPE_DEAUTH:
3181 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
3183 case IEEE80211_STYPE_DISASSOC:
3184 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
3186 case IEEE80211_STYPE_ACTION:
3187 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len, rx_status);
3196 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
3197 struct ieee80211_rx_status *rx_status)
3199 struct ieee80211_mgmt *mgmt;
3203 return RX_DROP_UNUSABLE;
3205 mgmt = (struct ieee80211_mgmt *) skb->data;
3206 fc = mgmt->frame_control;
3208 if (ieee80211_is_ctl(fc))
3212 return RX_DROP_MONITOR;
3214 if (ieee80211_is_probe_resp(fc)) {
3215 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
3220 if (ieee80211_is_beacon(fc)) {
3221 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
3230 static int ieee80211_sta_active_ibss(struct net_device *dev)
3232 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3234 struct sta_info *sta;
3235 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3239 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3240 if (sta->sdata == sdata &&
3241 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3254 static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time)
3256 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3257 struct sta_info *sta, *tmp;
3258 LIST_HEAD(tmp_list);
3259 DECLARE_MAC_BUF(mac);
3260 unsigned long flags;
3262 spin_lock_irqsave(&local->sta_lock, flags);
3263 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
3264 if (time_after(jiffies, sta->last_rx + exp_time)) {
3265 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3266 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
3267 dev->name, print_mac(mac, sta->addr));
3269 __sta_info_unlink(&sta);
3271 list_add(&sta->list, &tmp_list);
3273 spin_unlock_irqrestore(&local->sta_lock, flags);
3275 list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3276 sta_info_destroy(sta);
3280 static void ieee80211_sta_merge_ibss(struct net_device *dev,
3281 struct ieee80211_if_sta *ifsta)
3283 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3285 ieee80211_sta_expire(dev, IEEE80211_IBSS_INACTIVITY_LIMIT);
3286 if (ieee80211_sta_active_ibss(dev))
3289 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3290 "IBSS networks with same SSID (merge)\n", dev->name);
3291 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
3295 #ifdef CONFIG_MAC80211_MESH
3296 static void ieee80211_mesh_housekeeping(struct net_device *dev,
3297 struct ieee80211_if_sta *ifsta)
3299 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3302 ieee80211_sta_expire(dev, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3303 mesh_path_expire(dev);
3305 free_plinks = mesh_plink_availables(sdata);
3306 if (free_plinks != sdata->u.sta.accepting_plinks)
3307 ieee80211_if_config_beacon(dev);
3309 mod_timer(&ifsta->timer, jiffies +
3310 IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3314 void ieee80211_start_mesh(struct net_device *dev)
3316 struct ieee80211_if_sta *ifsta;
3317 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3318 ifsta = &sdata->u.sta;
3319 ifsta->state = IEEE80211_MESH_UP;
3320 ieee80211_sta_timer((unsigned long)sdata);
3325 void ieee80211_sta_timer(unsigned long data)
3327 struct ieee80211_sub_if_data *sdata =
3328 (struct ieee80211_sub_if_data *) data;
3329 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3330 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
3332 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3333 queue_work(local->hw.workqueue, &ifsta->work);
3336 void ieee80211_sta_work(struct work_struct *work)
3338 struct ieee80211_sub_if_data *sdata =
3339 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3340 struct net_device *dev = sdata->dev;
3341 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3342 struct ieee80211_if_sta *ifsta;
3343 struct sk_buff *skb;
3345 if (!netif_running(dev))
3348 if (local->sta_sw_scanning || local->sta_hw_scanning)
3351 if (WARN_ON(sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3352 sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3353 sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT))
3355 ifsta = &sdata->u.sta;
3357 while ((skb = skb_dequeue(&ifsta->skb_queue)))
3358 ieee80211_sta_rx_queued_mgmt(dev, skb);
3360 #ifdef CONFIG_MAC80211_MESH
3361 if (ifsta->preq_queue_len &&
3363 ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3364 mesh_path_start_discovery(dev);
3367 if (ifsta->state != IEEE80211_AUTHENTICATE &&
3368 ifsta->state != IEEE80211_ASSOCIATE &&
3369 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3370 if (ifsta->scan_ssid_len)
3371 ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
3373 ieee80211_sta_start_scan(dev, NULL, 0);
3377 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3378 if (ieee80211_sta_config_auth(dev, ifsta))
3380 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3381 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3384 switch (ifsta->state) {
3385 case IEEE80211_DISABLED:
3387 case IEEE80211_AUTHENTICATE:
3388 ieee80211_authenticate(dev, ifsta);
3390 case IEEE80211_ASSOCIATE:
3391 ieee80211_associate(dev, ifsta);
3393 case IEEE80211_ASSOCIATED:
3394 ieee80211_associated(dev, ifsta);
3396 case IEEE80211_IBSS_SEARCH:
3397 ieee80211_sta_find_ibss(dev, ifsta);
3399 case IEEE80211_IBSS_JOINED:
3400 ieee80211_sta_merge_ibss(dev, ifsta);
3402 #ifdef CONFIG_MAC80211_MESH
3403 case IEEE80211_MESH_UP:
3404 ieee80211_mesh_housekeeping(dev, ifsta);
3412 if (ieee80211_privacy_mismatch(dev, ifsta)) {
3413 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3414 "mixed-cell disabled - disassociate\n", dev->name);
3416 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
3417 ieee80211_set_disassoc(dev, ifsta, 0);
3422 static void ieee80211_sta_reset_auth(struct net_device *dev,
3423 struct ieee80211_if_sta *ifsta)
3425 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3427 if (local->ops->reset_tsf) {
3428 /* Reset own TSF to allow time synchronization work. */
3429 local->ops->reset_tsf(local_to_hw(local));
3432 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3435 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3436 ifsta->auth_alg = WLAN_AUTH_OPEN;
3437 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3438 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3439 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3440 ifsta->auth_alg = WLAN_AUTH_LEAP;
3442 ifsta->auth_alg = WLAN_AUTH_OPEN;
3443 ifsta->auth_transaction = -1;
3444 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3445 ifsta->auth_tries = ifsta->assoc_tries = 0;
3446 netif_carrier_off(dev);
3450 void ieee80211_sta_req_auth(struct net_device *dev,
3451 struct ieee80211_if_sta *ifsta)
3453 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3454 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3456 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3459 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3460 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3461 (ifsta->flags & (IEEE80211_STA_SSID_SET |
3462 IEEE80211_STA_AUTO_SSID_SEL))) {
3463 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3464 queue_work(local->hw.workqueue, &ifsta->work);
3468 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3469 const char *ssid, int ssid_len)
3471 int tmp, hidden_ssid;
3473 if (ssid_len == ifsta->ssid_len &&
3474 !memcmp(ifsta->ssid, ssid, ssid_len))
3477 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
3483 if (ssid[tmp] != '\0') {
3489 if (hidden_ssid && ifsta->ssid_len == ssid_len)
3492 if (ssid_len == 1 && ssid[0] == ' ')
3498 static int ieee80211_sta_config_auth(struct net_device *dev,
3499 struct ieee80211_if_sta *ifsta)
3501 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3502 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3503 struct ieee80211_sta_bss *bss, *selected = NULL;
3504 int top_rssi = 0, freq;
3506 spin_lock_bh(&local->sta_bss_lock);
3507 freq = local->oper_channel->center_freq;
3508 list_for_each_entry(bss, &local->sta_bss_list, list) {
3509 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3512 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3513 IEEE80211_STA_AUTO_BSSID_SEL |
3514 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
3515 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3516 !!sdata->default_key))
3519 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3523 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3524 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3527 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3528 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3531 if (!selected || top_rssi < bss->signal) {
3533 top_rssi = bss->signal;
3537 atomic_inc(&selected->users);
3538 spin_unlock_bh(&local->sta_bss_lock);
3541 ieee80211_set_freq(dev, selected->freq);
3542 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3543 ieee80211_sta_set_ssid(dev, selected->ssid,
3544 selected->ssid_len);
3545 ieee80211_sta_set_bssid(dev, selected->bssid);
3546 ieee80211_sta_def_wmm_params(dev, selected, 0);
3547 ieee80211_rx_bss_put(dev, selected);
3548 ifsta->state = IEEE80211_AUTHENTICATE;
3549 ieee80211_sta_reset_auth(dev, ifsta);
3552 if (ifsta->state != IEEE80211_AUTHENTICATE) {
3553 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3554 ieee80211_sta_start_scan(dev, NULL, 0);
3556 ieee80211_sta_start_scan(dev, ifsta->ssid,
3558 ifsta->state = IEEE80211_AUTHENTICATE;
3559 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3561 ifsta->state = IEEE80211_DISABLED;
3567 static int ieee80211_sta_create_ibss(struct net_device *dev,
3568 struct ieee80211_if_sta *ifsta)
3570 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3571 struct ieee80211_sta_bss *bss;
3572 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3573 struct ieee80211_supported_band *sband;
3574 u8 bssid[ETH_ALEN], *pos;
3577 DECLARE_MAC_BUF(mac);
3580 /* Easier testing, use fixed BSSID. */
3581 memset(bssid, 0xfe, ETH_ALEN);
3583 /* Generate random, not broadcast, locally administered BSSID. Mix in
3584 * own MAC address to make sure that devices that do not have proper
3585 * random number generator get different BSSID. */
3586 get_random_bytes(bssid, ETH_ALEN);
3587 for (i = 0; i < ETH_ALEN; i++)
3588 bssid[i] ^= dev->dev_addr[i];
3593 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3594 dev->name, print_mac(mac, bssid));
3596 bss = ieee80211_rx_bss_add(dev, bssid,
3597 local->hw.conf.channel->center_freq,
3598 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3602 bss->band = local->hw.conf.channel->band;
3603 sband = local->hw.wiphy->bands[bss->band];
3605 if (local->hw.conf.beacon_int == 0)
3606 local->hw.conf.beacon_int = 100;
3607 bss->beacon_int = local->hw.conf.beacon_int;
3608 bss->last_update = jiffies;
3609 bss->capability = WLAN_CAPABILITY_IBSS;
3611 if (sdata->default_key)
3612 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3614 sdata->drop_unencrypted = 0;
3616 bss->supp_rates_len = sband->n_bitrates;
3617 pos = bss->supp_rates;
3618 for (i = 0; i < sband->n_bitrates; i++) {
3619 int rate = sband->bitrates[i].bitrate;
3620 *pos++ = (u8) (rate / 5);
3623 ret = ieee80211_sta_join_ibss(dev, ifsta, bss);
3624 ieee80211_rx_bss_put(dev, bss);
3629 static int ieee80211_sta_find_ibss(struct net_device *dev,
3630 struct ieee80211_if_sta *ifsta)
3632 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3633 struct ieee80211_sta_bss *bss;
3637 DECLARE_MAC_BUF(mac);
3638 DECLARE_MAC_BUF(mac2);
3640 if (ifsta->ssid_len == 0)
3643 active_ibss = ieee80211_sta_active_ibss(dev);
3644 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3645 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3646 dev->name, active_ibss);
3647 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3648 spin_lock_bh(&local->sta_bss_lock);
3649 list_for_each_entry(bss, &local->sta_bss_list, list) {
3650 if (ifsta->ssid_len != bss->ssid_len ||
3651 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3652 || !(bss->capability & WLAN_CAPABILITY_IBSS))
3654 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3655 printk(KERN_DEBUG " bssid=%s found\n",
3656 print_mac(mac, bss->bssid));
3657 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3658 memcpy(bssid, bss->bssid, ETH_ALEN);
3660 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3663 spin_unlock_bh(&local->sta_bss_lock);
3665 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3666 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
3667 "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
3668 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3669 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
3670 (bss = ieee80211_rx_bss_get(dev, bssid,
3671 local->hw.conf.channel->center_freq,
3672 ifsta->ssid, ifsta->ssid_len))) {
3674 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3675 " based on configured SSID\n",
3676 dev->name, print_mac(mac, bssid));
3677 ret = ieee80211_sta_join_ibss(dev, ifsta, bss);
3678 ieee80211_rx_bss_put(dev, bss);
3681 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3682 printk(KERN_DEBUG " did not try to join ibss\n");
3683 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3685 /* Selected IBSS not found in current scan results - try to scan */
3686 if (ifsta->state == IEEE80211_IBSS_JOINED &&
3687 !ieee80211_sta_active_ibss(dev)) {
3688 mod_timer(&ifsta->timer, jiffies +
3689 IEEE80211_IBSS_MERGE_INTERVAL);
3690 } else if (time_after(jiffies, local->last_scan_completed +
3691 IEEE80211_SCAN_INTERVAL)) {
3692 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3693 "join\n", dev->name);
3694 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3696 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3697 int interval = IEEE80211_SCAN_INTERVAL;
3699 if (time_after(jiffies, ifsta->ibss_join_req +
3700 IEEE80211_IBSS_JOIN_TIMEOUT)) {
3701 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3702 (!(local->oper_channel->flags &
3703 IEEE80211_CHAN_NO_IBSS)))
3704 return ieee80211_sta_create_ibss(dev, ifsta);
3705 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3706 printk(KERN_DEBUG "%s: IBSS not allowed on"
3707 " %d MHz\n", dev->name,
3708 local->hw.conf.channel->center_freq);
3711 /* No IBSS found - decrease scan interval and continue
3713 interval = IEEE80211_SCAN_INTERVAL_SLOW;
3716 ifsta->state = IEEE80211_IBSS_SEARCH;
3717 mod_timer(&ifsta->timer, jiffies + interval);
3725 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3727 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3728 struct ieee80211_if_sta *ifsta;
3730 if (len > IEEE80211_MAX_SSID_LEN)
3733 ifsta = &sdata->u.sta;
3735 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3736 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3737 memcpy(ifsta->ssid, ssid, len);
3738 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3739 ifsta->ssid_len = len;
3742 ifsta->flags |= IEEE80211_STA_SSID_SET;
3744 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3745 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3746 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3747 ifsta->ibss_join_req = jiffies;
3748 ifsta->state = IEEE80211_IBSS_SEARCH;
3749 return ieee80211_sta_find_ibss(dev, ifsta);
3755 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3757 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3758 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3759 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3760 *len = ifsta->ssid_len;
3765 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3767 struct ieee80211_sub_if_data *sdata;
3768 struct ieee80211_if_sta *ifsta;
3771 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3772 ifsta = &sdata->u.sta;
3774 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3775 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3776 res = ieee80211_if_config(dev);
3778 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3779 "the low-level driver\n", dev->name);
3784 if (is_valid_ether_addr(bssid))
3785 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3787 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3793 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3794 struct ieee80211_sub_if_data *sdata,
3797 struct sk_buff *skb;
3798 struct ieee80211_hdr *nullfunc;
3801 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3803 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3804 "frame\n", sdata->dev->name);
3807 skb_reserve(skb, local->hw.extra_tx_headroom);
3809 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3810 memset(nullfunc, 0, 24);
3811 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3812 IEEE80211_FCTL_TODS);
3814 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
3815 nullfunc->frame_control = fc;
3816 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3817 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3818 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3820 ieee80211_sta_tx(sdata->dev, skb, 0);
3824 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3826 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3827 ieee80211_vif_is_mesh(&sdata->vif))
3828 ieee80211_sta_timer((unsigned long)sdata);
3831 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3833 struct ieee80211_local *local = hw_to_local(hw);
3834 struct net_device *dev = local->scan_dev;
3835 struct ieee80211_sub_if_data *sdata;
3836 union iwreq_data wrqu;
3838 local->last_scan_completed = jiffies;
3839 memset(&wrqu, 0, sizeof(wrqu));
3840 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3842 if (local->sta_hw_scanning) {
3843 local->sta_hw_scanning = 0;
3844 if (ieee80211_hw_config(local))
3845 printk(KERN_DEBUG "%s: failed to restore operational "
3846 "channel after scan\n", dev->name);
3847 /* Restart STA timer for HW scan case */
3849 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3850 ieee80211_restart_sta_timer(sdata);
3856 local->sta_sw_scanning = 0;
3857 if (ieee80211_hw_config(local))
3858 printk(KERN_DEBUG "%s: failed to restore operational "
3859 "channel after scan\n", dev->name);
3862 netif_tx_lock_bh(local->mdev);
3863 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3864 local->ops->configure_filter(local_to_hw(local),
3865 FIF_BCN_PRBRESP_PROMISC,
3866 &local->filter_flags,
3867 local->mdev->mc_count,
3868 local->mdev->mc_list);
3870 netif_tx_unlock_bh(local->mdev);
3873 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3875 /* No need to wake the master device. */
3876 if (sdata->dev == local->mdev)
3879 /* Tell AP we're back */
3880 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3881 sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3882 ieee80211_send_nullfunc(local, sdata, 0);
3884 ieee80211_restart_sta_timer(sdata);
3886 netif_wake_queue(sdata->dev);
3891 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3892 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3893 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3894 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3895 (!ifsta->state == IEEE80211_IBSS_JOINED &&
3896 !ieee80211_sta_active_ibss(dev)))
3897 ieee80211_sta_find_ibss(dev, ifsta);
3900 EXPORT_SYMBOL(ieee80211_scan_completed);
3902 void ieee80211_sta_scan_work(struct work_struct *work)
3904 struct ieee80211_local *local =
3905 container_of(work, struct ieee80211_local, scan_work.work);
3906 struct net_device *dev = local->scan_dev;
3907 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3908 struct ieee80211_supported_band *sband;
3909 struct ieee80211_channel *chan;
3911 unsigned long next_delay = 0;
3913 if (!local->sta_sw_scanning)
3916 switch (local->scan_state) {
3917 case SCAN_SET_CHANNEL:
3919 * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3920 * after we successfully scanned the last channel of the last
3921 * band (and the last band is supported by the hw)
3923 if (local->scan_band < IEEE80211_NUM_BANDS)
3924 sband = local->hw.wiphy->bands[local->scan_band];
3929 * If we are at an unsupported band and have more bands
3930 * left to scan, advance to the next supported one.
3932 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
3934 sband = local->hw.wiphy->bands[local->scan_band];
3935 local->scan_channel_idx = 0;
3938 /* if no more bands/channels left, complete scan */
3939 if (!sband || local->scan_channel_idx >= sband->n_channels) {
3940 ieee80211_scan_completed(local_to_hw(local));
3944 chan = &sband->channels[local->scan_channel_idx];
3946 if (chan->flags & IEEE80211_CHAN_DISABLED ||
3947 (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3948 chan->flags & IEEE80211_CHAN_NO_IBSS))
3952 local->scan_channel = chan;
3953 if (ieee80211_hw_config(local)) {
3954 printk(KERN_DEBUG "%s: failed to set freq to "
3955 "%d MHz for scan\n", dev->name,
3961 /* advance state machine to next channel/band */
3962 local->scan_channel_idx++;
3963 if (local->scan_channel_idx >= sband->n_channels) {
3965 * scan_band may end up == IEEE80211_NUM_BANDS, but
3966 * we'll catch that case above and complete the scan
3967 * if that is the case.
3970 local->scan_channel_idx = 0;
3976 next_delay = IEEE80211_PROBE_DELAY +
3977 usecs_to_jiffies(local->hw.channel_change_time);
3978 local->scan_state = SCAN_SEND_PROBE;
3980 case SCAN_SEND_PROBE:
3981 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3982 local->scan_state = SCAN_SET_CHANNEL;
3984 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3986 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3987 local->scan_ssid_len);
3988 next_delay = IEEE80211_CHANNEL_TIME;
3992 if (local->sta_sw_scanning)
3993 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3998 static int ieee80211_sta_start_scan(struct net_device *dev,
3999 u8 *ssid, size_t ssid_len)
4001 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4002 struct ieee80211_sub_if_data *sdata;
4004 if (ssid_len > IEEE80211_MAX_SSID_LEN)
4007 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
4008 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
4011 * ScanType: ACTIVE, PASSIVE
4012 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
4013 * a Probe frame during active scanning
4015 * MinChannelTime (>= ProbeDelay), in TU
4016 * MaxChannelTime: (>= MinChannelTime), in TU
4019 /* MLME-SCAN.confirm
4021 * ResultCode: SUCCESS, INVALID_PARAMETERS
4024 if (local->sta_sw_scanning || local->sta_hw_scanning) {
4025 if (local->scan_dev == dev)
4030 if (local->ops->hw_scan) {
4031 int rc = local->ops->hw_scan(local_to_hw(local),
4034 local->sta_hw_scanning = 1;
4035 local->scan_dev = dev;
4040 local->sta_sw_scanning = 1;
4043 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4045 /* Don't stop the master interface, otherwise we can't transmit
4047 if (sdata->dev == local->mdev)
4050 netif_stop_queue(sdata->dev);
4051 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
4052 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
4053 ieee80211_send_nullfunc(local, sdata, 1);
4058 local->scan_ssid_len = ssid_len;
4059 memcpy(local->scan_ssid, ssid, ssid_len);
4061 local->scan_ssid_len = 0;
4062 local->scan_state = SCAN_SET_CHANNEL;
4063 local->scan_channel_idx = 0;
4064 local->scan_band = IEEE80211_BAND_2GHZ;
4065 local->scan_dev = dev;
4067 netif_tx_lock_bh(local->mdev);
4068 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
4069 local->ops->configure_filter(local_to_hw(local),
4070 FIF_BCN_PRBRESP_PROMISC,
4071 &local->filter_flags,
4072 local->mdev->mc_count,
4073 local->mdev->mc_list);
4074 netif_tx_unlock_bh(local->mdev);
4076 /* TODO: start scan as soon as all nullfunc frames are ACKed */
4077 queue_delayed_work(local->hw.workqueue, &local->scan_work,
4078 IEEE80211_CHANNEL_TIME);
4084 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
4086 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4087 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4088 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4090 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4091 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
4093 if (local->sta_sw_scanning || local->sta_hw_scanning) {
4094 if (local->scan_dev == dev)
4099 ifsta->scan_ssid_len = ssid_len;
4101 memcpy(ifsta->scan_ssid, ssid, ssid_len);
4102 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
4103 queue_work(local->hw.workqueue, &ifsta->work);
4108 ieee80211_sta_scan_result(struct net_device *dev,
4109 struct iw_request_info *info,
4110 struct ieee80211_sta_bss *bss,
4111 char *current_ev, char *end_buf)
4113 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4114 struct iw_event iwe;
4116 if (time_after(jiffies,
4117 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
4120 memset(&iwe, 0, sizeof(iwe));
4121 iwe.cmd = SIOCGIWAP;
4122 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
4123 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
4124 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4127 memset(&iwe, 0, sizeof(iwe));
4128 iwe.cmd = SIOCGIWESSID;
4129 if (bss_mesh_cfg(bss)) {
4130 iwe.u.data.length = bss_mesh_id_len(bss);
4131 iwe.u.data.flags = 1;
4132 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4133 &iwe, bss_mesh_id(bss));
4135 iwe.u.data.length = bss->ssid_len;
4136 iwe.u.data.flags = 1;
4137 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4141 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
4142 || bss_mesh_cfg(bss)) {
4143 memset(&iwe, 0, sizeof(iwe));
4144 iwe.cmd = SIOCGIWMODE;
4145 if (bss_mesh_cfg(bss))
4146 iwe.u.mode = IW_MODE_MESH;
4147 else if (bss->capability & WLAN_CAPABILITY_ESS)
4148 iwe.u.mode = IW_MODE_MASTER;
4150 iwe.u.mode = IW_MODE_ADHOC;
4151 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
4152 &iwe, IW_EV_UINT_LEN);
4155 memset(&iwe, 0, sizeof(iwe));
4156 iwe.cmd = SIOCGIWFREQ;
4157 iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
4159 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4162 memset(&iwe, 0, sizeof(iwe));
4163 iwe.cmd = SIOCGIWFREQ;
4164 iwe.u.freq.m = bss->freq;
4166 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4168 memset(&iwe, 0, sizeof(iwe));
4170 iwe.u.qual.qual = bss->qual;
4171 iwe.u.qual.level = bss->signal;
4172 iwe.u.qual.noise = bss->noise;
4173 iwe.u.qual.updated = local->wstats_flags;
4174 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4177 memset(&iwe, 0, sizeof(iwe));
4178 iwe.cmd = SIOCGIWENCODE;
4179 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
4180 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4182 iwe.u.data.flags = IW_ENCODE_DISABLED;
4183 iwe.u.data.length = 0;
4184 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4187 if (bss && bss->wpa_ie) {
4188 memset(&iwe, 0, sizeof(iwe));
4189 iwe.cmd = IWEVGENIE;
4190 iwe.u.data.length = bss->wpa_ie_len;
4191 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4195 if (bss && bss->rsn_ie) {
4196 memset(&iwe, 0, sizeof(iwe));
4197 iwe.cmd = IWEVGENIE;
4198 iwe.u.data.length = bss->rsn_ie_len;
4199 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4203 if (bss && bss->ht_ie) {
4204 memset(&iwe, 0, sizeof(iwe));
4205 iwe.cmd = IWEVGENIE;
4206 iwe.u.data.length = bss->ht_ie_len;
4207 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4211 if (bss && bss->supp_rates_len > 0) {
4212 /* display all supported rates in readable format */
4213 char *p = current_ev + iwe_stream_lcp_len(info);
4216 memset(&iwe, 0, sizeof(iwe));
4217 iwe.cmd = SIOCGIWRATE;
4218 /* Those two flags are ignored... */
4219 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4221 for (i = 0; i < bss->supp_rates_len; i++) {
4222 iwe.u.bitrate.value = ((bss->supp_rates[i] &
4224 p = iwe_stream_add_value(info, current_ev, p,
4225 end_buf, &iwe, IW_EV_PARAM_LEN);
4232 buf = kmalloc(30, GFP_ATOMIC);
4234 memset(&iwe, 0, sizeof(iwe));
4235 iwe.cmd = IWEVCUSTOM;
4236 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4237 iwe.u.data.length = strlen(buf);
4238 current_ev = iwe_stream_add_point(info, current_ev,
4241 memset(&iwe, 0, sizeof(iwe));
4242 iwe.cmd = IWEVCUSTOM;
4243 sprintf(buf, " Last beacon: %dms ago",
4244 jiffies_to_msecs(jiffies - bss->last_update));
4245 iwe.u.data.length = strlen(buf);
4246 current_ev = iwe_stream_add_point(info, current_ev,
4247 end_buf, &iwe, buf);
4252 if (bss_mesh_cfg(bss)) {
4254 u8 *cfg = bss_mesh_cfg(bss);
4255 buf = kmalloc(50, GFP_ATOMIC);
4257 memset(&iwe, 0, sizeof(iwe));
4258 iwe.cmd = IWEVCUSTOM;
4259 sprintf(buf, "Mesh network (version %d)", cfg[0]);
4260 iwe.u.data.length = strlen(buf);
4261 current_ev = iwe_stream_add_point(info, current_ev,
4264 sprintf(buf, "Path Selection Protocol ID: "
4265 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4267 iwe.u.data.length = strlen(buf);
4268 current_ev = iwe_stream_add_point(info, current_ev,
4271 sprintf(buf, "Path Selection Metric ID: "
4272 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4274 iwe.u.data.length = strlen(buf);
4275 current_ev = iwe_stream_add_point(info, current_ev,
4278 sprintf(buf, "Congestion Control Mode ID: "
4279 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4281 iwe.u.data.length = strlen(buf);
4282 current_ev = iwe_stream_add_point(info, current_ev,
4285 sprintf(buf, "Channel Precedence: "
4286 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4288 iwe.u.data.length = strlen(buf);
4289 current_ev = iwe_stream_add_point(info, current_ev,
4300 int ieee80211_sta_scan_results(struct net_device *dev,
4301 struct iw_request_info *info,
4302 char *buf, size_t len)
4304 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4305 char *current_ev = buf;
4306 char *end_buf = buf + len;
4307 struct ieee80211_sta_bss *bss;
4309 spin_lock_bh(&local->sta_bss_lock);
4310 list_for_each_entry(bss, &local->sta_bss_list, list) {
4311 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4312 spin_unlock_bh(&local->sta_bss_lock);
4315 current_ev = ieee80211_sta_scan_result(dev, info, bss,
4316 current_ev, end_buf);
4318 spin_unlock_bh(&local->sta_bss_lock);
4319 return current_ev - buf;
4323 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
4325 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4326 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4328 kfree(ifsta->extra_ie);
4330 ifsta->extra_ie = NULL;
4331 ifsta->extra_ie_len = 0;
4334 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4335 if (!ifsta->extra_ie) {
4336 ifsta->extra_ie_len = 0;
4339 memcpy(ifsta->extra_ie, ie, len);
4340 ifsta->extra_ie_len = len;
4345 struct sta_info *ieee80211_ibss_add_sta(struct net_device *dev,
4346 struct sk_buff *skb, u8 *bssid,
4347 u8 *addr, u64 supp_rates)
4349 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4350 struct sta_info *sta;
4351 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4352 DECLARE_MAC_BUF(mac);
4353 int band = local->hw.conf.channel->band;
4355 /* TODO: Could consider removing the least recently used entry and
4356 * allow new one to be added. */
4357 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4358 if (net_ratelimit()) {
4359 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
4360 "entry %s\n", dev->name, print_mac(mac, addr));
4365 if (!ieee80211_bssid_match(bssid, sdata->u.sta.bssid))
4368 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
4369 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
4370 wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
4373 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4377 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
4380 sta->supp_rates[band] = supp_rates;
4382 sta->supp_rates[band] = sdata->u.sta.supp_rates_bits[band];
4384 rate_control_rate_init(sta, local);
4386 if (sta_info_insert(sta))
4393 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
4395 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4396 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4398 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
4401 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4402 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
4405 ieee80211_send_deauth(dev, ifsta, reason);
4406 ieee80211_set_disassoc(dev, ifsta, 1);
4411 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
4413 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4414 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4416 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
4419 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4422 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
4425 ieee80211_send_disassoc(dev, ifsta, reason);
4426 ieee80211_set_disassoc(dev, ifsta, 0);
4430 void ieee80211_notify_mac(struct ieee80211_hw *hw,
4431 enum ieee80211_notification_types notif_type)
4433 struct ieee80211_local *local = hw_to_local(hw);
4434 struct ieee80211_sub_if_data *sdata;
4436 switch (notif_type) {
4437 case IEEE80211_NOTIFY_RE_ASSOC:
4439 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4441 if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
4442 ieee80211_sta_req_auth(sdata->dev,
4451 EXPORT_SYMBOL(ieee80211_notify_mac);