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 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
370 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
371 DECLARE_MAC_BUF(mac);
375 if (use_protection != bss_conf->use_cts_prot) {
376 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
377 if (net_ratelimit()) {
378 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
381 use_protection ? "enabled" : "disabled",
382 print_mac(mac, ifsta->bssid));
385 bss_conf->use_cts_prot = use_protection;
386 changed |= BSS_CHANGED_ERP_CTS_PROT;
389 if (use_short_preamble != bss_conf->use_short_preamble) {
390 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
391 if (net_ratelimit()) {
392 printk(KERN_DEBUG "%s: switched to %s barker preamble"
395 use_short_preamble ? "short" : "long",
396 print_mac(mac, ifsta->bssid));
399 bss_conf->use_short_preamble = use_short_preamble;
400 changed |= BSS_CHANGED_ERP_PREAMBLE;
406 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
409 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
410 bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
412 return ieee80211_handle_protect_preamb(sdata,
413 use_protection, use_short_preamble);
416 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
417 struct ieee80211_sta_bss *bss)
421 if (bss->has_erp_value)
422 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
424 u16 capab = bss->capability;
425 changed |= ieee80211_handle_protect_preamb(sdata, false,
426 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
432 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
433 struct ieee80211_ht_info *ht_info)
439 memset(ht_info, 0, sizeof(*ht_info));
442 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
444 ht_info->ht_supported = 1;
445 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
446 ht_info->ampdu_factor =
447 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
448 ht_info->ampdu_density =
449 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
450 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
452 ht_info->ht_supported = 0;
457 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
458 struct ieee80211_ht_addt_info *ht_add_info_ie,
459 struct ieee80211_ht_bss_info *bss_info)
461 if (bss_info == NULL)
464 memset(bss_info, 0, sizeof(*bss_info));
466 if (ht_add_info_ie) {
468 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
470 bss_info->primary_channel = ht_add_info_ie->control_chan;
471 bss_info->bss_cap = ht_add_info_ie->ht_param;
472 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
478 static void ieee80211_sta_send_associnfo(struct net_device *dev,
479 struct ieee80211_if_sta *ifsta)
484 union iwreq_data wrqu;
486 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
489 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
490 ifsta->assocresp_ies_len), GFP_KERNEL);
494 len = sprintf(buf, "ASSOCINFO(");
495 if (ifsta->assocreq_ies) {
496 len += sprintf(buf + len, "ReqIEs=");
497 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
498 len += sprintf(buf + len, "%02x",
499 ifsta->assocreq_ies[i]);
502 if (ifsta->assocresp_ies) {
503 if (ifsta->assocreq_ies)
504 len += sprintf(buf + len, " ");
505 len += sprintf(buf + len, "RespIEs=");
506 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
507 len += sprintf(buf + len, "%02x",
508 ifsta->assocresp_ies[i]);
511 len += sprintf(buf + len, ")");
513 if (len > IW_CUSTOM_MAX) {
514 len = sprintf(buf, "ASSOCRESPIE=");
515 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
516 len += sprintf(buf + len, "%02x",
517 ifsta->assocresp_ies[i]);
521 memset(&wrqu, 0, sizeof(wrqu));
522 wrqu.data.length = len;
523 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
529 static void ieee80211_set_associated(struct net_device *dev,
530 struct ieee80211_if_sta *ifsta,
533 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
534 struct ieee80211_local *local = sdata->local;
535 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
536 union iwreq_data wrqu;
537 u32 changed = BSS_CHANGED_ASSOC;
540 struct ieee80211_sta_bss *bss;
542 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
544 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
547 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
548 conf->channel->center_freq,
549 ifsta->ssid, ifsta->ssid_len);
551 /* set timing information */
552 sdata->bss_conf.beacon_int = bss->beacon_int;
553 sdata->bss_conf.timestamp = bss->timestamp;
555 changed |= ieee80211_handle_bss_capability(sdata, bss);
557 ieee80211_rx_bss_put(dev, bss);
560 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
561 changed |= BSS_CHANGED_HT;
562 sdata->bss_conf.assoc_ht = 1;
563 sdata->bss_conf.ht_conf = &conf->ht_conf;
564 sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
567 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
568 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
569 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
570 ieee80211_sta_send_associnfo(dev, ifsta);
572 netif_carrier_off(dev);
573 ieee80211_sta_tear_down_BA_sessions(dev, ifsta->bssid);
574 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
575 changed |= ieee80211_reset_erp_info(dev);
577 sdata->bss_conf.assoc_ht = 0;
578 sdata->bss_conf.ht_conf = NULL;
579 sdata->bss_conf.ht_bss_conf = NULL;
581 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
583 ifsta->last_probe = jiffies;
584 ieee80211_led_assoc(local, assoc);
586 sdata->bss_conf.assoc = assoc;
587 ieee80211_bss_info_change_notify(sdata, changed);
590 netif_carrier_on(dev);
592 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
593 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
596 static void ieee80211_set_disassoc(struct net_device *dev,
597 struct ieee80211_if_sta *ifsta, int deauth)
600 ifsta->auth_tries = 0;
601 ifsta->assoc_tries = 0;
602 ieee80211_set_associated(dev, ifsta, 0);
605 void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
608 struct ieee80211_sub_if_data *sdata;
609 struct ieee80211_tx_info *info;
611 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
612 skb->dev = sdata->local->mdev;
613 skb_set_mac_header(skb, 0);
614 skb_set_network_header(skb, 0);
615 skb_set_transport_header(skb, 0);
617 info = IEEE80211_SKB_CB(skb);
618 memset(info, 0, sizeof(struct ieee80211_tx_info));
619 info->control.ifindex = sdata->dev->ifindex;
621 info->flags |= IEEE80211_TX_CTL_DO_NOT_ENCRYPT;
627 static void ieee80211_send_auth(struct net_device *dev,
628 struct ieee80211_if_sta *ifsta,
629 int transaction, u8 *extra, size_t extra_len,
632 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
634 struct ieee80211_mgmt *mgmt;
636 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
637 sizeof(*mgmt) + 6 + extra_len);
639 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
640 "frame\n", dev->name);
643 skb_reserve(skb, local->hw.extra_tx_headroom);
645 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
646 memset(mgmt, 0, 24 + 6);
647 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
648 IEEE80211_STYPE_AUTH);
650 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
651 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
652 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
653 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
654 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
655 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
656 ifsta->auth_transaction = transaction + 1;
657 mgmt->u.auth.status_code = cpu_to_le16(0);
659 memcpy(skb_put(skb, extra_len), extra, extra_len);
661 ieee80211_sta_tx(dev, skb, encrypt);
665 static void ieee80211_authenticate(struct net_device *dev,
666 struct ieee80211_if_sta *ifsta)
668 DECLARE_MAC_BUF(mac);
671 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
672 printk(KERN_DEBUG "%s: authentication with AP %s"
674 dev->name, print_mac(mac, ifsta->bssid));
675 ifsta->state = IEEE80211_DISABLED;
679 ifsta->state = IEEE80211_AUTHENTICATE;
680 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
681 dev->name, print_mac(mac, ifsta->bssid));
683 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
685 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
688 static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss,
689 struct ieee80211_supported_band *sband,
695 for (i = 0; i < bss->supp_rates_len; i++) {
696 int rate = (bss->supp_rates[i] & 0x7F) * 5;
698 for (j = 0; j < sband->n_bitrates; j++)
699 if (sband->bitrates[j].bitrate == rate) {
709 static void ieee80211_send_assoc(struct net_device *dev,
710 struct ieee80211_if_sta *ifsta)
712 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
714 struct ieee80211_mgmt *mgmt;
716 int i, len, count, rates_len, supp_rates_len;
718 struct ieee80211_sta_bss *bss;
720 struct ieee80211_supported_band *sband;
723 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
724 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
727 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
728 "frame\n", dev->name);
731 skb_reserve(skb, local->hw.extra_tx_headroom);
733 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
735 capab = ifsta->capab;
737 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
738 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
739 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
740 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
741 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
744 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
745 local->hw.conf.channel->center_freq,
746 ifsta->ssid, ifsta->ssid_len);
748 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
749 capab |= WLAN_CAPABILITY_PRIVACY;
753 /* get all rates supported by the device and the AP as
754 * some APs don't like getting a superset of their rates
755 * in the association request (e.g. D-Link DAP 1353 in
757 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
759 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
760 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
761 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
763 ieee80211_rx_bss_put(dev, bss);
766 rates_len = sband->n_bitrates;
769 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
771 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
772 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
773 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
775 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
777 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
778 IEEE80211_STYPE_REASSOC_REQ);
779 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
780 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
781 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
785 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
786 IEEE80211_STYPE_ASSOC_REQ);
787 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
788 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
792 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
793 *pos++ = WLAN_EID_SSID;
794 *pos++ = ifsta->ssid_len;
795 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
797 /* add all rates which were marked to be used above */
798 supp_rates_len = rates_len;
799 if (supp_rates_len > 8)
802 len = sband->n_bitrates;
803 pos = skb_put(skb, supp_rates_len + 2);
804 *pos++ = WLAN_EID_SUPP_RATES;
805 *pos++ = supp_rates_len;
808 for (i = 0; i < sband->n_bitrates; i++) {
809 if (BIT(i) & rates) {
810 int rate = sband->bitrates[i].bitrate;
811 *pos++ = (u8) (rate / 5);
818 pos = skb_put(skb, rates_len - count + 2);
819 *pos++ = WLAN_EID_EXT_SUPP_RATES;
820 *pos++ = rates_len - count;
822 for (i++; i < sband->n_bitrates; i++) {
823 if (BIT(i) & rates) {
824 int rate = sband->bitrates[i].bitrate;
825 *pos++ = (u8) (rate / 5);
830 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
831 /* 1. power capabilities */
832 pos = skb_put(skb, 4);
833 *pos++ = WLAN_EID_PWR_CAPABILITY;
835 *pos++ = 0; /* min tx power */
836 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
838 /* 2. supported channels */
839 /* TODO: get this in reg domain format */
840 pos = skb_put(skb, 2 * sband->n_channels + 2);
841 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
842 *pos++ = 2 * sband->n_channels;
843 for (i = 0; i < sband->n_channels; i++) {
844 *pos++ = ieee80211_frequency_to_channel(
845 sband->channels[i].center_freq);
846 *pos++ = 1; /* one channel in the subband*/
850 if (ifsta->extra_ie) {
851 pos = skb_put(skb, ifsta->extra_ie_len);
852 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
855 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
856 pos = skb_put(skb, 9);
857 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
858 *pos++ = 7; /* len */
859 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
862 *pos++ = 2; /* WME */
863 *pos++ = 0; /* WME info */
864 *pos++ = 1; /* WME ver */
868 /* wmm support is a must to HT */
869 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
870 sband->ht_info.ht_supported && bss->ht_add_ie) {
871 struct ieee80211_ht_addt_info *ht_add_info =
872 (struct ieee80211_ht_addt_info *)bss->ht_add_ie;
873 u16 cap = sband->ht_info.cap;
875 u32 flags = local->hw.conf.channel->flags;
877 switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) {
878 case IEEE80211_HT_IE_CHA_SEC_ABOVE:
879 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
880 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
881 cap &= ~IEEE80211_HT_CAP_SGI_40;
884 case IEEE80211_HT_IE_CHA_SEC_BELOW:
885 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
886 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
887 cap &= ~IEEE80211_HT_CAP_SGI_40;
892 tmp = cpu_to_le16(cap);
893 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
894 *pos++ = WLAN_EID_HT_CAPABILITY;
895 *pos++ = sizeof(struct ieee80211_ht_cap);
896 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
897 memcpy(pos, &tmp, sizeof(u16));
899 /* TODO: needs a define here for << 2 */
900 *pos++ = sband->ht_info.ampdu_factor |
901 (sband->ht_info.ampdu_density << 2);
902 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
905 kfree(ifsta->assocreq_ies);
906 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
907 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
908 if (ifsta->assocreq_ies)
909 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
911 ieee80211_sta_tx(dev, skb, 0);
915 static void ieee80211_send_deauth(struct net_device *dev,
916 struct ieee80211_if_sta *ifsta, u16 reason)
918 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
920 struct ieee80211_mgmt *mgmt;
922 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
924 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
925 "frame\n", dev->name);
928 skb_reserve(skb, local->hw.extra_tx_headroom);
930 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
932 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
933 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
934 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
935 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
936 IEEE80211_STYPE_DEAUTH);
938 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
940 ieee80211_sta_tx(dev, skb, 0);
944 static void ieee80211_send_disassoc(struct net_device *dev,
945 struct ieee80211_if_sta *ifsta, u16 reason)
947 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
949 struct ieee80211_mgmt *mgmt;
951 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
953 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
954 "frame\n", dev->name);
957 skb_reserve(skb, local->hw.extra_tx_headroom);
959 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
961 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
962 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
963 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
964 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
965 IEEE80211_STYPE_DISASSOC);
967 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
969 ieee80211_sta_tx(dev, skb, 0);
973 static int ieee80211_privacy_mismatch(struct net_device *dev,
974 struct ieee80211_if_sta *ifsta)
976 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
977 struct ieee80211_sta_bss *bss;
982 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
985 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
986 local->hw.conf.channel->center_freq,
987 ifsta->ssid, ifsta->ssid_len);
991 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
992 wep_privacy = !!ieee80211_sta_wep_configured(dev);
993 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
995 ieee80211_rx_bss_put(dev, bss);
997 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
1004 static void ieee80211_associate(struct net_device *dev,
1005 struct ieee80211_if_sta *ifsta)
1007 DECLARE_MAC_BUF(mac);
1009 ifsta->assoc_tries++;
1010 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
1011 printk(KERN_DEBUG "%s: association with AP %s"
1013 dev->name, print_mac(mac, ifsta->bssid));
1014 ifsta->state = IEEE80211_DISABLED;
1018 ifsta->state = IEEE80211_ASSOCIATE;
1019 printk(KERN_DEBUG "%s: associate with AP %s\n",
1020 dev->name, print_mac(mac, ifsta->bssid));
1021 if (ieee80211_privacy_mismatch(dev, ifsta)) {
1022 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
1023 "mixed-cell disabled - abort association\n", dev->name);
1024 ifsta->state = IEEE80211_DISABLED;
1028 ieee80211_send_assoc(dev, ifsta);
1030 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1034 static void ieee80211_associated(struct net_device *dev,
1035 struct ieee80211_if_sta *ifsta)
1037 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1038 struct sta_info *sta;
1040 DECLARE_MAC_BUF(mac);
1042 /* TODO: start monitoring current AP signal quality and number of
1043 * missed beacons. Scan other channels every now and then and search
1044 * for better APs. */
1045 /* TODO: remove expired BSSes */
1047 ifsta->state = IEEE80211_ASSOCIATED;
1051 sta = sta_info_get(local, ifsta->bssid);
1053 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
1054 dev->name, print_mac(mac, ifsta->bssid));
1058 if (time_after(jiffies,
1059 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
1060 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
1061 printk(KERN_DEBUG "%s: No ProbeResp from "
1062 "current AP %s - assume out of "
1064 dev->name, print_mac(mac, ifsta->bssid));
1066 sta_info_unlink(&sta);
1068 ieee80211_send_probe_req(dev, ifsta->bssid,
1070 local->scan_ssid_len);
1071 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
1073 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1074 if (time_after(jiffies, ifsta->last_probe +
1075 IEEE80211_PROBE_INTERVAL)) {
1076 ifsta->last_probe = jiffies;
1077 ieee80211_send_probe_req(dev, ifsta->bssid,
1086 if (disassoc && sta)
1087 sta_info_destroy(sta);
1090 ifsta->state = IEEE80211_DISABLED;
1091 ieee80211_set_associated(dev, ifsta, 0);
1093 mod_timer(&ifsta->timer, jiffies +
1094 IEEE80211_MONITORING_INTERVAL);
1099 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
1100 u8 *ssid, size_t ssid_len)
1102 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1103 struct ieee80211_supported_band *sband;
1104 struct sk_buff *skb;
1105 struct ieee80211_mgmt *mgmt;
1106 u8 *pos, *supp_rates, *esupp_rates = NULL;
1109 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
1111 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1112 "request\n", dev->name);
1115 skb_reserve(skb, local->hw.extra_tx_headroom);
1117 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1118 memset(mgmt, 0, 24);
1119 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1120 IEEE80211_STYPE_PROBE_REQ);
1121 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1123 memcpy(mgmt->da, dst, ETH_ALEN);
1124 memcpy(mgmt->bssid, dst, ETH_ALEN);
1126 memset(mgmt->da, 0xff, ETH_ALEN);
1127 memset(mgmt->bssid, 0xff, ETH_ALEN);
1129 pos = skb_put(skb, 2 + ssid_len);
1130 *pos++ = WLAN_EID_SSID;
1132 memcpy(pos, ssid, ssid_len);
1134 supp_rates = skb_put(skb, 2);
1135 supp_rates[0] = WLAN_EID_SUPP_RATES;
1137 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1139 for (i = 0; i < sband->n_bitrates; i++) {
1140 struct ieee80211_rate *rate = &sband->bitrates[i];
1142 pos = skb_put(skb, 1);
1144 } else if (supp_rates[1] == 8) {
1145 esupp_rates = skb_put(skb, 3);
1146 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1148 pos = &esupp_rates[2];
1150 pos = skb_put(skb, 1);
1153 *pos = rate->bitrate / 5;
1156 ieee80211_sta_tx(dev, skb, 0);
1160 static int ieee80211_sta_wep_configured(struct net_device *dev)
1162 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1163 if (!sdata || !sdata->default_key ||
1164 sdata->default_key->conf.alg != ALG_WEP)
1170 static void ieee80211_auth_completed(struct net_device *dev,
1171 struct ieee80211_if_sta *ifsta)
1173 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
1174 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1175 ieee80211_associate(dev, ifsta);
1179 static void ieee80211_auth_challenge(struct net_device *dev,
1180 struct ieee80211_if_sta *ifsta,
1181 struct ieee80211_mgmt *mgmt,
1185 struct ieee802_11_elems elems;
1187 pos = mgmt->u.auth.variable;
1188 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1189 if (!elems.challenge)
1191 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1192 elems.challenge_len + 2, 1);
1195 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1196 u8 dialog_token, u16 status, u16 policy,
1197 u16 buf_size, u16 timeout)
1199 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1200 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1201 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1202 struct sk_buff *skb;
1203 struct ieee80211_mgmt *mgmt;
1206 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1209 printk(KERN_DEBUG "%s: failed to allocate buffer "
1210 "for addba resp frame\n", dev->name);
1214 skb_reserve(skb, local->hw.extra_tx_headroom);
1215 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1216 memset(mgmt, 0, 24);
1217 memcpy(mgmt->da, da, ETH_ALEN);
1218 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1219 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1220 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1222 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1223 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1224 IEEE80211_STYPE_ACTION);
1226 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1227 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1228 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1229 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1231 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1232 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1233 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1235 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1236 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1237 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1239 ieee80211_sta_tx(dev, skb, 0);
1244 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1245 u16 tid, u8 dialog_token, u16 start_seq_num,
1246 u16 agg_size, u16 timeout)
1248 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1249 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1250 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1251 struct sk_buff *skb;
1252 struct ieee80211_mgmt *mgmt;
1255 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1258 printk(KERN_ERR "%s: failed to allocate buffer "
1259 "for addba request frame\n", dev->name);
1262 skb_reserve(skb, local->hw.extra_tx_headroom);
1263 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1264 memset(mgmt, 0, 24);
1265 memcpy(mgmt->da, da, ETH_ALEN);
1266 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1267 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1268 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1270 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1272 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1273 IEEE80211_STYPE_ACTION);
1275 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1277 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1278 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1280 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1281 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
1282 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1283 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
1285 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1287 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1288 mgmt->u.action.u.addba_req.start_seq_num =
1289 cpu_to_le16(start_seq_num << 4);
1291 ieee80211_sta_tx(dev, skb, 0);
1294 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1295 struct ieee80211_mgmt *mgmt,
1298 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1299 struct ieee80211_hw *hw = &local->hw;
1300 struct ieee80211_conf *conf = &hw->conf;
1301 struct sta_info *sta;
1302 struct tid_ampdu_rx *tid_agg_rx;
1303 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1305 int ret = -EOPNOTSUPP;
1306 DECLARE_MAC_BUF(mac);
1310 sta = sta_info_get(local, mgmt->sa);
1316 /* extract session parameters from addba request frame */
1317 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1318 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1320 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1322 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1323 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1324 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1325 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1327 status = WLAN_STATUS_REQUEST_DECLINED;
1329 /* sanity check for incoming parameters:
1330 * check if configuration can support the BA policy
1331 * and if buffer size does not exceeds max value */
1332 if (((ba_policy != 1)
1333 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1334 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1335 status = WLAN_STATUS_INVALID_QOS_PARAM;
1336 #ifdef CONFIG_MAC80211_HT_DEBUG
1337 if (net_ratelimit())
1338 printk(KERN_DEBUG "AddBA Req with bad params from "
1339 "%s on tid %u. policy %d, buffer size %d\n",
1340 print_mac(mac, mgmt->sa), tid, ba_policy,
1342 #endif /* CONFIG_MAC80211_HT_DEBUG */
1345 /* determine default buffer size */
1346 if (buf_size == 0) {
1347 struct ieee80211_supported_band *sband;
1349 sband = local->hw.wiphy->bands[conf->channel->band];
1350 buf_size = IEEE80211_MIN_AMPDU_BUF;
1351 buf_size = buf_size << sband->ht_info.ampdu_factor;
1355 /* examine state machine */
1356 spin_lock_bh(&sta->lock);
1358 if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
1359 #ifdef CONFIG_MAC80211_HT_DEBUG
1360 if (net_ratelimit())
1361 printk(KERN_DEBUG "unexpected AddBA Req from "
1363 print_mac(mac, mgmt->sa), tid);
1364 #endif /* CONFIG_MAC80211_HT_DEBUG */
1368 /* prepare A-MPDU MLME for Rx aggregation */
1369 sta->ampdu_mlme.tid_rx[tid] =
1370 kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1371 if (!sta->ampdu_mlme.tid_rx[tid]) {
1372 #ifdef CONFIG_MAC80211_HT_DEBUG
1373 if (net_ratelimit())
1374 printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1380 sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1381 sta_rx_agg_session_timer_expired;
1382 sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1383 (unsigned long)&sta->timer_to_tid[tid];
1384 init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1386 tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1388 /* prepare reordering buffer */
1389 tid_agg_rx->reorder_buf =
1390 kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC);
1391 if (!tid_agg_rx->reorder_buf) {
1392 #ifdef CONFIG_MAC80211_HT_DEBUG
1393 if (net_ratelimit())
1394 printk(KERN_ERR "can not allocate reordering buffer "
1395 "to tid %d\n", tid);
1397 kfree(sta->ampdu_mlme.tid_rx[tid]);
1400 memset(tid_agg_rx->reorder_buf, 0,
1401 buf_size * sizeof(struct sk_buff *));
1403 if (local->ops->ampdu_action)
1404 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1405 sta->addr, tid, &start_seq_num);
1406 #ifdef CONFIG_MAC80211_HT_DEBUG
1407 printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
1408 #endif /* CONFIG_MAC80211_HT_DEBUG */
1411 kfree(tid_agg_rx->reorder_buf);
1413 sta->ampdu_mlme.tid_rx[tid] = NULL;
1417 /* change state and send addba resp */
1418 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
1419 tid_agg_rx->dialog_token = dialog_token;
1420 tid_agg_rx->ssn = start_seq_num;
1421 tid_agg_rx->head_seq_num = start_seq_num;
1422 tid_agg_rx->buf_size = buf_size;
1423 tid_agg_rx->timeout = timeout;
1424 tid_agg_rx->stored_mpdu_num = 0;
1425 status = WLAN_STATUS_SUCCESS;
1427 spin_unlock_bh(&sta->lock);
1430 ieee80211_send_addba_resp(sta->sdata->dev, sta->addr, tid,
1431 dialog_token, status, 1, buf_size, timeout);
1435 static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1436 struct ieee80211_mgmt *mgmt,
1439 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1440 struct ieee80211_hw *hw = &local->hw;
1441 struct sta_info *sta;
1448 sta = sta_info_get(local, mgmt->sa);
1454 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1455 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1457 state = &sta->ampdu_mlme.tid_state_tx[tid];
1459 spin_lock_bh(&sta->lock);
1461 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1462 spin_unlock_bh(&sta->lock);
1463 goto addba_resp_exit;
1466 if (mgmt->u.action.u.addba_resp.dialog_token !=
1467 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
1468 spin_unlock_bh(&sta->lock);
1469 #ifdef CONFIG_MAC80211_HT_DEBUG
1470 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1471 #endif /* CONFIG_MAC80211_HT_DEBUG */
1472 goto addba_resp_exit;
1475 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
1476 #ifdef CONFIG_MAC80211_HT_DEBUG
1477 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1478 #endif /* CONFIG_MAC80211_HT_DEBUG */
1479 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1480 == WLAN_STATUS_SUCCESS) {
1481 *state |= HT_ADDBA_RECEIVED_MSK;
1482 sta->ampdu_mlme.addba_req_num[tid] = 0;
1484 if (*state == HT_AGG_STATE_OPERATIONAL)
1485 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1487 spin_unlock_bh(&sta->lock);
1489 sta->ampdu_mlme.addba_req_num[tid]++;
1490 /* this will allow the state check in stop_BA_session */
1491 *state = HT_AGG_STATE_OPERATIONAL;
1492 spin_unlock_bh(&sta->lock);
1493 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1494 WLAN_BACK_INITIATOR);
1501 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1502 u16 initiator, u16 reason_code)
1504 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1505 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1506 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1507 struct sk_buff *skb;
1508 struct ieee80211_mgmt *mgmt;
1511 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1514 printk(KERN_ERR "%s: failed to allocate buffer "
1515 "for delba frame\n", dev->name);
1519 skb_reserve(skb, local->hw.extra_tx_headroom);
1520 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1521 memset(mgmt, 0, 24);
1522 memcpy(mgmt->da, da, ETH_ALEN);
1523 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1524 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1525 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1527 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1528 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1529 IEEE80211_STYPE_ACTION);
1531 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1533 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1534 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1535 params = (u16)(initiator << 11); /* bit 11 initiator */
1536 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1538 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1539 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1541 ieee80211_sta_tx(dev, skb, 0);
1544 void ieee80211_send_bar(struct net_device *dev, u8 *ra, u16 tid, u16 ssn)
1546 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1547 struct sk_buff *skb;
1548 struct ieee80211_bar *bar;
1549 u16 bar_control = 0;
1551 skb = dev_alloc_skb(sizeof(*bar) + local->hw.extra_tx_headroom);
1553 printk(KERN_ERR "%s: failed to allocate buffer for "
1554 "bar frame\n", dev->name);
1557 skb_reserve(skb, local->hw.extra_tx_headroom);
1558 bar = (struct ieee80211_bar *)skb_put(skb, sizeof(*bar));
1559 memset(bar, 0, sizeof(*bar));
1560 bar->frame_control = IEEE80211_FC(IEEE80211_FTYPE_CTL,
1561 IEEE80211_STYPE_BACK_REQ);
1562 memcpy(bar->ra, ra, ETH_ALEN);
1563 memcpy(bar->ta, dev->dev_addr, ETH_ALEN);
1564 bar_control |= (u16)IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL;
1565 bar_control |= (u16)IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA;
1566 bar_control |= (u16)(tid << 12);
1567 bar->control = cpu_to_le16(bar_control);
1568 bar->start_seq_num = cpu_to_le16(ssn);
1570 ieee80211_sta_tx(dev, skb, 0);
1573 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1574 u16 initiator, u16 reason)
1576 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1577 struct ieee80211_hw *hw = &local->hw;
1578 struct sta_info *sta;
1580 DECLARE_MAC_BUF(mac);
1584 sta = sta_info_get(local, ra);
1590 /* check if TID is in operational state */
1591 spin_lock_bh(&sta->lock);
1592 if (sta->ampdu_mlme.tid_state_rx[tid]
1593 != HT_AGG_STATE_OPERATIONAL) {
1594 spin_unlock_bh(&sta->lock);
1598 sta->ampdu_mlme.tid_state_rx[tid] =
1599 HT_AGG_STATE_REQ_STOP_BA_MSK |
1600 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1601 spin_unlock_bh(&sta->lock);
1603 /* stop HW Rx aggregation. ampdu_action existence
1604 * already verified in session init so we add the BUG_ON */
1605 BUG_ON(!local->ops->ampdu_action);
1607 #ifdef CONFIG_MAC80211_HT_DEBUG
1608 printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n",
1609 print_mac(mac, ra), tid);
1610 #endif /* CONFIG_MAC80211_HT_DEBUG */
1612 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1615 printk(KERN_DEBUG "HW problem - can not stop rx "
1616 "aggregation for tid %d\n", tid);
1618 /* shutdown timer has not expired */
1619 if (initiator != WLAN_BACK_TIMER)
1620 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1622 /* check if this is a self generated aggregation halt */
1623 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1624 ieee80211_send_delba(dev, ra, tid, 0, reason);
1626 /* free the reordering buffer */
1627 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1628 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
1629 /* release the reordered frames */
1630 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1631 sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1632 sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
1635 /* free resources */
1636 kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1637 kfree(sta->ampdu_mlme.tid_rx[tid]);
1638 sta->ampdu_mlme.tid_rx[tid] = NULL;
1639 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
1645 static void ieee80211_sta_process_delba(struct net_device *dev,
1646 struct ieee80211_mgmt *mgmt, size_t len)
1648 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1649 struct sta_info *sta;
1652 DECLARE_MAC_BUF(mac);
1656 sta = sta_info_get(local, mgmt->sa);
1662 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1663 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1664 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1666 #ifdef CONFIG_MAC80211_HT_DEBUG
1667 if (net_ratelimit())
1668 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1669 print_mac(mac, mgmt->sa),
1670 initiator ? "initiator" : "recipient", tid,
1671 mgmt->u.action.u.delba.reason_code);
1672 #endif /* CONFIG_MAC80211_HT_DEBUG */
1674 if (initiator == WLAN_BACK_INITIATOR)
1675 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1676 WLAN_BACK_INITIATOR, 0);
1677 else { /* WLAN_BACK_RECIPIENT */
1678 spin_lock_bh(&sta->lock);
1679 sta->ampdu_mlme.tid_state_tx[tid] =
1680 HT_AGG_STATE_OPERATIONAL;
1681 spin_unlock_bh(&sta->lock);
1682 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1683 WLAN_BACK_RECIPIENT);
1689 * After sending add Block Ack request we activated a timer until
1690 * add Block Ack response will arrive from the recipient.
1691 * If this timer expires sta_addba_resp_timer_expired will be executed.
1693 void sta_addba_resp_timer_expired(unsigned long data)
1695 /* not an elegant detour, but there is no choice as the timer passes
1696 * only one argument, and both sta_info and TID are needed, so init
1697 * flow in sta_info_create gives the TID as data, while the timer_to_id
1698 * array gives the sta through container_of */
1699 u16 tid = *(u8 *)data;
1700 struct sta_info *temp_sta = container_of((void *)data,
1701 struct sta_info, timer_to_tid[tid]);
1703 struct ieee80211_local *local = temp_sta->local;
1704 struct ieee80211_hw *hw = &local->hw;
1705 struct sta_info *sta;
1710 sta = sta_info_get(local, temp_sta->addr);
1716 state = &sta->ampdu_mlme.tid_state_tx[tid];
1717 /* check if the TID waits for addBA response */
1718 spin_lock_bh(&sta->lock);
1719 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1720 spin_unlock_bh(&sta->lock);
1721 *state = HT_AGG_STATE_IDLE;
1722 #ifdef CONFIG_MAC80211_HT_DEBUG
1723 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1724 "expecting addBA response there", tid);
1726 goto timer_expired_exit;
1729 #ifdef CONFIG_MAC80211_HT_DEBUG
1730 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1733 /* go through the state check in stop_BA_session */
1734 *state = HT_AGG_STATE_OPERATIONAL;
1735 spin_unlock_bh(&sta->lock);
1736 ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1737 WLAN_BACK_INITIATOR);
1744 * After accepting the AddBA Request we activated a timer,
1745 * resetting it after each frame that arrives from the originator.
1746 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1748 static void sta_rx_agg_session_timer_expired(unsigned long data)
1750 /* not an elegant detour, but there is no choice as the timer passes
1751 * only one argument, and various sta_info are needed here, so init
1752 * flow in sta_info_create gives the TID as data, while the timer_to_id
1753 * array gives the sta through container_of */
1754 u8 *ptid = (u8 *)data;
1755 u8 *timer_to_id = ptid - *ptid;
1756 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1759 #ifdef CONFIG_MAC80211_HT_DEBUG
1760 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1762 ieee80211_sta_stop_rx_ba_session(sta->sdata->dev, sta->addr,
1763 (u16)*ptid, WLAN_BACK_TIMER,
1764 WLAN_REASON_QSTA_TIMEOUT);
1767 void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr)
1769 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1772 for (i = 0; i < STA_TID_NUM; i++) {
1773 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1774 WLAN_BACK_INITIATOR);
1775 ieee80211_sta_stop_rx_ba_session(dev, addr, i,
1776 WLAN_BACK_RECIPIENT,
1777 WLAN_REASON_QSTA_LEAVE_QBSS);
1781 static void ieee80211_send_refuse_measurement_request(struct net_device *dev,
1782 struct ieee80211_msrment_ie *request_ie,
1783 const u8 *da, const u8 *bssid,
1786 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1787 struct sk_buff *skb;
1788 struct ieee80211_mgmt *msr_report;
1790 skb = dev_alloc_skb(sizeof(*msr_report) + local->hw.extra_tx_headroom +
1791 sizeof(struct ieee80211_msrment_ie));
1794 printk(KERN_ERR "%s: failed to allocate buffer for "
1795 "measurement report frame\n", dev->name);
1799 skb_reserve(skb, local->hw.extra_tx_headroom);
1800 msr_report = (struct ieee80211_mgmt *)skb_put(skb, 24);
1801 memset(msr_report, 0, 24);
1802 memcpy(msr_report->da, da, ETH_ALEN);
1803 memcpy(msr_report->sa, dev->dev_addr, ETH_ALEN);
1804 memcpy(msr_report->bssid, bssid, ETH_ALEN);
1805 msr_report->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1806 IEEE80211_STYPE_ACTION);
1808 skb_put(skb, 1 + sizeof(msr_report->u.action.u.measurement));
1809 msr_report->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
1810 msr_report->u.action.u.measurement.action_code =
1811 WLAN_ACTION_SPCT_MSR_RPRT;
1812 msr_report->u.action.u.measurement.dialog_token = dialog_token;
1814 msr_report->u.action.u.measurement.element_id = WLAN_EID_MEASURE_REPORT;
1815 msr_report->u.action.u.measurement.length =
1816 sizeof(struct ieee80211_msrment_ie);
1818 memset(&msr_report->u.action.u.measurement.msr_elem, 0,
1819 sizeof(struct ieee80211_msrment_ie));
1820 msr_report->u.action.u.measurement.msr_elem.token = request_ie->token;
1821 msr_report->u.action.u.measurement.msr_elem.mode |=
1822 IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED;
1823 msr_report->u.action.u.measurement.msr_elem.type = request_ie->type;
1825 ieee80211_sta_tx(dev, skb, 0);
1828 static void ieee80211_sta_process_measurement_req(struct net_device *dev,
1829 struct ieee80211_mgmt *mgmt,
1833 * Ignoring measurement request is spec violation.
1834 * Mandatory measurements must be reported optional
1835 * measurements might be refused or reported incapable
1836 * For now just refuse
1837 * TODO: Answer basic measurement as unmeasured
1839 ieee80211_send_refuse_measurement_request(dev,
1840 &mgmt->u.action.u.measurement.msr_elem,
1841 mgmt->sa, mgmt->bssid,
1842 mgmt->u.action.u.measurement.dialog_token);
1846 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1847 struct ieee80211_if_sta *ifsta,
1848 struct ieee80211_mgmt *mgmt,
1851 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1852 u16 auth_alg, auth_transaction, status_code;
1853 DECLARE_MAC_BUF(mac);
1855 if (ifsta->state != IEEE80211_AUTHENTICATE &&
1856 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
1862 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1863 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1866 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1867 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1870 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1871 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1872 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1874 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1876 * IEEE 802.11 standard does not require authentication in IBSS
1877 * networks and most implementations do not seem to use it.
1878 * However, try to reply to authentication attempts if someone
1879 * has actually implemented this.
1881 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
1883 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1886 if (auth_alg != ifsta->auth_alg ||
1887 auth_transaction != ifsta->auth_transaction)
1890 if (status_code != WLAN_STATUS_SUCCESS) {
1891 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1893 const int num_algs = ARRAY_SIZE(algs);
1895 algs[0] = algs[1] = algs[2] = 0xff;
1896 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1897 algs[0] = WLAN_AUTH_OPEN;
1898 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1899 algs[1] = WLAN_AUTH_SHARED_KEY;
1900 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1901 algs[2] = WLAN_AUTH_LEAP;
1902 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1904 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1908 for (i = 0; i < num_algs; i++) {
1910 if (pos >= num_algs)
1912 if (algs[pos] == ifsta->auth_alg ||
1915 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1916 !ieee80211_sta_wep_configured(dev))
1918 ifsta->auth_alg = algs[pos];
1925 switch (ifsta->auth_alg) {
1926 case WLAN_AUTH_OPEN:
1927 case WLAN_AUTH_LEAP:
1928 ieee80211_auth_completed(dev, ifsta);
1930 case WLAN_AUTH_SHARED_KEY:
1931 if (ifsta->auth_transaction == 4)
1932 ieee80211_auth_completed(dev, ifsta);
1934 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1940 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1941 struct ieee80211_if_sta *ifsta,
1942 struct ieee80211_mgmt *mgmt,
1946 DECLARE_MAC_BUF(mac);
1951 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1954 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1956 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
1957 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1959 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1960 ifsta->state == IEEE80211_ASSOCIATE ||
1961 ifsta->state == IEEE80211_ASSOCIATED) {
1962 ifsta->state = IEEE80211_AUTHENTICATE;
1963 mod_timer(&ifsta->timer, jiffies +
1964 IEEE80211_RETRY_AUTH_INTERVAL);
1967 ieee80211_set_disassoc(dev, ifsta, 1);
1968 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1972 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1973 struct ieee80211_if_sta *ifsta,
1974 struct ieee80211_mgmt *mgmt,
1978 DECLARE_MAC_BUF(mac);
1983 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1986 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1988 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1989 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1991 if (ifsta->state == IEEE80211_ASSOCIATED) {
1992 ifsta->state = IEEE80211_ASSOCIATE;
1993 mod_timer(&ifsta->timer, jiffies +
1994 IEEE80211_RETRY_AUTH_INTERVAL);
1997 ieee80211_set_disassoc(dev, ifsta, 0);
2001 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2002 struct ieee80211_if_sta *ifsta,
2003 struct ieee80211_mgmt *mgmt,
2007 struct ieee80211_local *local = sdata->local;
2008 struct net_device *dev = sdata->dev;
2009 struct ieee80211_supported_band *sband;
2010 struct sta_info *sta;
2011 u64 rates, basic_rates;
2012 u16 capab_info, status_code, aid;
2013 struct ieee802_11_elems elems;
2014 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
2017 DECLARE_MAC_BUF(mac);
2018 bool have_higher_than_11mbit = false;
2020 /* AssocResp and ReassocResp have identical structure, so process both
2021 * of them in this function. */
2023 if (ifsta->state != IEEE80211_ASSOCIATE)
2029 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
2032 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2033 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2034 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2036 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
2037 "status=%d aid=%d)\n",
2038 dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
2039 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2041 if (status_code != WLAN_STATUS_SUCCESS) {
2042 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
2043 dev->name, status_code);
2044 /* if this was a reassociation, ensure we try a "full"
2045 * association next time. This works around some broken APs
2046 * which do not correctly reject reassociation requests. */
2047 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2051 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2052 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
2053 "set\n", dev->name, aid);
2054 aid &= ~(BIT(15) | BIT(14));
2056 pos = mgmt->u.assoc_resp.variable;
2057 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2059 if (!elems.supp_rates) {
2060 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
2065 printk(KERN_DEBUG "%s: associated\n", dev->name);
2067 ifsta->ap_capab = capab_info;
2069 kfree(ifsta->assocresp_ies);
2070 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
2071 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
2072 if (ifsta->assocresp_ies)
2073 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
2077 /* Add STA entry for the AP */
2078 sta = sta_info_get(local, ifsta->bssid);
2080 struct ieee80211_sta_bss *bss;
2083 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
2085 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
2086 " the AP\n", dev->name);
2090 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
2091 local->hw.conf.channel->center_freq,
2092 ifsta->ssid, ifsta->ssid_len);
2094 sta->last_signal = bss->signal;
2095 sta->last_qual = bss->qual;
2096 sta->last_noise = bss->noise;
2097 ieee80211_rx_bss_put(dev, bss);
2100 err = sta_info_insert(sta);
2102 printk(KERN_DEBUG "%s: failed to insert STA entry for"
2103 " the AP (error %d)\n", dev->name, err);
2110 * FIXME: Do we really need to update the sta_info's information here?
2111 * We already know about the AP (we found it in our list) so it
2112 * should already be filled with the right info, no?
2113 * As is stands, all this is racy because typically we assume
2114 * the information that is filled in here (except flags) doesn't
2115 * change while a STA structure is alive. As such, it should move
2116 * to between the sta_info_alloc() and sta_info_insert() above.
2119 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
2120 WLAN_STA_AUTHORIZED);
2124 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2126 for (i = 0; i < elems.supp_rates_len; i++) {
2127 int rate = (elems.supp_rates[i] & 0x7f) * 5;
2130 have_higher_than_11mbit = true;
2132 for (j = 0; j < sband->n_bitrates; j++) {
2133 if (sband->bitrates[j].bitrate == rate)
2135 if (elems.supp_rates[i] & 0x80)
2136 basic_rates |= BIT(j);
2140 for (i = 0; i < elems.ext_supp_rates_len; i++) {
2141 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
2144 have_higher_than_11mbit = true;
2146 for (j = 0; j < sband->n_bitrates; j++) {
2147 if (sband->bitrates[j].bitrate == rate)
2149 if (elems.ext_supp_rates[i] & 0x80)
2150 basic_rates |= BIT(j);
2154 sta->supp_rates[local->hw.conf.channel->band] = rates;
2155 sdata->basic_rates = basic_rates;
2157 /* cf. IEEE 802.11 9.2.12 */
2158 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2159 have_higher_than_11mbit)
2160 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2162 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
2164 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
2165 (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2166 struct ieee80211_ht_bss_info bss_info;
2167 ieee80211_ht_cap_ie_to_ht_info(
2168 (struct ieee80211_ht_cap *)
2169 elems.ht_cap_elem, &sta->ht_info);
2170 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2171 (struct ieee80211_ht_addt_info *)
2172 elems.ht_info_elem, &bss_info);
2173 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
2176 rate_control_rate_init(sta, local);
2178 if (elems.wmm_param) {
2179 set_sta_flags(sta, WLAN_STA_WME);
2181 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2182 elems.wmm_param_len);
2186 /* set AID and assoc capability,
2187 * ieee80211_set_associated() will tell the driver */
2188 bss_conf->aid = aid;
2189 bss_conf->assoc_capability = capab_info;
2190 ieee80211_set_associated(dev, ifsta, 1);
2192 ieee80211_associated(dev, ifsta);
2196 /* Caller must hold local->sta_bss_lock */
2197 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
2198 struct ieee80211_sta_bss *bss)
2200 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2203 if (bss_mesh_cfg(bss))
2204 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2205 bss_mesh_id_len(bss));
2207 hash_idx = STA_HASH(bss->bssid);
2209 bss->hnext = local->sta_bss_hash[hash_idx];
2210 local->sta_bss_hash[hash_idx] = bss;
2214 /* Caller must hold local->sta_bss_lock */
2215 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
2216 struct ieee80211_sta_bss *bss)
2218 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2219 struct ieee80211_sta_bss *b, *prev = NULL;
2220 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2224 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2227 prev->hnext = bss->hnext;
2236 static struct ieee80211_sta_bss *
2237 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
2238 u8 *ssid, u8 ssid_len)
2240 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2241 struct ieee80211_sta_bss *bss;
2243 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2246 atomic_inc(&bss->users);
2247 atomic_inc(&bss->users);
2248 memcpy(bss->bssid, bssid, ETH_ALEN);
2250 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2251 memcpy(bss->ssid, ssid, ssid_len);
2252 bss->ssid_len = ssid_len;
2255 spin_lock_bh(&local->sta_bss_lock);
2256 /* TODO: order by RSSI? */
2257 list_add_tail(&bss->list, &local->sta_bss_list);
2258 __ieee80211_rx_bss_hash_add(dev, bss);
2259 spin_unlock_bh(&local->sta_bss_lock);
2263 static struct ieee80211_sta_bss *
2264 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
2265 u8 *ssid, u8 ssid_len)
2267 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2268 struct ieee80211_sta_bss *bss;
2270 spin_lock_bh(&local->sta_bss_lock);
2271 bss = local->sta_bss_hash[STA_HASH(bssid)];
2273 if (!bss_mesh_cfg(bss) &&
2274 !memcmp(bss->bssid, bssid, ETH_ALEN) &&
2275 bss->freq == freq &&
2276 bss->ssid_len == ssid_len &&
2277 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
2278 atomic_inc(&bss->users);
2283 spin_unlock_bh(&local->sta_bss_lock);
2287 #ifdef CONFIG_MAC80211_MESH
2288 static struct ieee80211_sta_bss *
2289 ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2290 u8 *mesh_cfg, int freq)
2292 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2293 struct ieee80211_sta_bss *bss;
2295 spin_lock_bh(&local->sta_bss_lock);
2296 bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2298 if (bss_mesh_cfg(bss) &&
2299 !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
2300 bss->freq == freq &&
2301 mesh_id_len == bss->mesh_id_len &&
2302 (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2304 atomic_inc(&bss->users);
2309 spin_unlock_bh(&local->sta_bss_lock);
2313 static struct ieee80211_sta_bss *
2314 ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2315 u8 *mesh_cfg, int mesh_config_len, int freq)
2317 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2318 struct ieee80211_sta_bss *bss;
2320 if (mesh_config_len != MESH_CFG_LEN)
2323 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2327 bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
2328 if (!bss->mesh_cfg) {
2333 if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2334 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2335 if (!bss->mesh_id) {
2336 kfree(bss->mesh_cfg);
2340 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2343 atomic_inc(&bss->users);
2344 atomic_inc(&bss->users);
2345 memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
2346 bss->mesh_id_len = mesh_id_len;
2348 spin_lock_bh(&local->sta_bss_lock);
2349 /* TODO: order by RSSI? */
2350 list_add_tail(&bss->list, &local->sta_bss_list);
2351 __ieee80211_rx_bss_hash_add(dev, bss);
2352 spin_unlock_bh(&local->sta_bss_lock);
2357 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2363 kfree(bss->ht_add_ie);
2364 kfree(bss_mesh_id(bss));
2365 kfree(bss_mesh_cfg(bss));
2370 static void ieee80211_rx_bss_put(struct net_device *dev,
2371 struct ieee80211_sta_bss *bss)
2373 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2376 if (!atomic_dec_and_lock(&bss->users, &local->sta_bss_lock)) {
2381 __ieee80211_rx_bss_hash_del(dev, bss);
2382 list_del(&bss->list);
2383 spin_unlock_bh(&local->sta_bss_lock);
2384 ieee80211_rx_bss_free(bss);
2388 void ieee80211_rx_bss_list_init(struct net_device *dev)
2390 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2391 spin_lock_init(&local->sta_bss_lock);
2392 INIT_LIST_HEAD(&local->sta_bss_list);
2396 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2398 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2399 struct ieee80211_sta_bss *bss, *tmp;
2401 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2402 ieee80211_rx_bss_put(dev, bss);
2406 static int ieee80211_sta_join_ibss(struct net_device *dev,
2407 struct ieee80211_if_sta *ifsta,
2408 struct ieee80211_sta_bss *bss)
2410 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2411 int res, rates, i, j;
2412 struct sk_buff *skb;
2413 struct ieee80211_mgmt *mgmt;
2414 struct ieee80211_tx_info *control;
2415 struct rate_selection ratesel;
2417 struct ieee80211_sub_if_data *sdata;
2418 struct ieee80211_supported_band *sband;
2419 union iwreq_data wrqu;
2421 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2423 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2425 /* Remove possible STA entries from other IBSS networks. */
2426 sta_info_flush_delayed(sdata);
2428 if (local->ops->reset_tsf) {
2429 /* Reset own TSF to allow time synchronization work. */
2430 local->ops->reset_tsf(local_to_hw(local));
2432 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2433 res = ieee80211_if_config(dev);
2437 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2439 sdata->drop_unencrypted = bss->capability &
2440 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2442 res = ieee80211_set_freq(dev, bss->freq);
2447 /* Set beacon template */
2448 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2453 skb_reserve(skb, local->hw.extra_tx_headroom);
2455 mgmt = (struct ieee80211_mgmt *)
2456 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2457 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2458 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2459 IEEE80211_STYPE_BEACON);
2460 memset(mgmt->da, 0xff, ETH_ALEN);
2461 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2462 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2463 mgmt->u.beacon.beacon_int =
2464 cpu_to_le16(local->hw.conf.beacon_int);
2465 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
2466 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2468 pos = skb_put(skb, 2 + ifsta->ssid_len);
2469 *pos++ = WLAN_EID_SSID;
2470 *pos++ = ifsta->ssid_len;
2471 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2473 rates = bss->supp_rates_len;
2476 pos = skb_put(skb, 2 + rates);
2477 *pos++ = WLAN_EID_SUPP_RATES;
2479 memcpy(pos, bss->supp_rates, rates);
2481 if (bss->band == IEEE80211_BAND_2GHZ) {
2482 pos = skb_put(skb, 2 + 1);
2483 *pos++ = WLAN_EID_DS_PARAMS;
2485 *pos++ = ieee80211_frequency_to_channel(bss->freq);
2488 pos = skb_put(skb, 2 + 2);
2489 *pos++ = WLAN_EID_IBSS_PARAMS;
2491 /* FIX: set ATIM window based on scan results */
2495 if (bss->supp_rates_len > 8) {
2496 rates = bss->supp_rates_len - 8;
2497 pos = skb_put(skb, 2 + rates);
2498 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2500 memcpy(pos, &bss->supp_rates[8], rates);
2503 control = IEEE80211_SKB_CB(skb);
2505 rate_control_get_rate(dev, sband, skb, &ratesel);
2506 if (ratesel.rate_idx < 0) {
2507 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2508 "for IBSS beacon\n", dev->name);
2511 control->control.vif = &sdata->vif;
2512 control->tx_rate_idx = ratesel.rate_idx;
2513 if (sdata->bss_conf.use_short_preamble &&
2514 sband->bitrates[ratesel.rate_idx].flags & IEEE80211_RATE_SHORT_PREAMBLE)
2515 control->flags |= IEEE80211_TX_CTL_SHORT_PREAMBLE;
2516 control->antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2517 control->flags |= IEEE80211_TX_CTL_NO_ACK;
2518 control->flags |= IEEE80211_TX_CTL_DO_NOT_ENCRYPT;
2519 control->control.retry_limit = 1;
2521 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2522 if (ifsta->probe_resp) {
2523 mgmt = (struct ieee80211_mgmt *)
2524 ifsta->probe_resp->data;
2525 mgmt->frame_control =
2526 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2527 IEEE80211_STYPE_PROBE_RESP);
2529 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2530 "template for IBSS\n", dev->name);
2533 if (local->ops->beacon_update &&
2534 local->ops->beacon_update(local_to_hw(local), skb) == 0) {
2535 printk(KERN_DEBUG "%s: Configured IBSS beacon "
2536 "template\n", dev->name);
2541 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2542 for (i = 0; i < bss->supp_rates_len; i++) {
2543 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2544 for (j = 0; j < sband->n_bitrates; j++)
2545 if (sband->bitrates[j].bitrate == bitrate)
2548 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2550 ieee80211_sta_def_wmm_params(dev, bss, 1);
2554 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2555 "template\n", dev->name);
2559 ifsta->state = IEEE80211_IBSS_JOINED;
2560 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2562 memset(&wrqu, 0, sizeof(wrqu));
2563 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
2564 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
2569 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2570 struct ieee802_11_elems *elems,
2571 enum ieee80211_band band)
2573 struct ieee80211_supported_band *sband;
2574 struct ieee80211_rate *bitrates;
2578 sband = local->hw.wiphy->bands[band];
2582 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2585 bitrates = sband->bitrates;
2586 num_rates = sband->n_bitrates;
2588 for (i = 0; i < elems->supp_rates_len +
2589 elems->ext_supp_rates_len; i++) {
2592 if (i < elems->supp_rates_len)
2593 rate = elems->supp_rates[i];
2594 else if (elems->ext_supp_rates)
2595 rate = elems->ext_supp_rates
2596 [i - elems->supp_rates_len];
2597 own_rate = 5 * (rate & 0x7f);
2598 for (j = 0; j < num_rates; j++)
2599 if (bitrates[j].bitrate == own_rate)
2600 supp_rates |= BIT(j);
2606 static void ieee80211_rx_bss_info(struct net_device *dev,
2607 struct ieee80211_mgmt *mgmt,
2609 struct ieee80211_rx_status *rx_status,
2610 struct ieee802_11_elems *elems,
2613 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2615 struct ieee80211_sta_bss *bss;
2616 struct sta_info *sta;
2617 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2618 u64 beacon_timestamp, rx_timestamp;
2619 struct ieee80211_channel *channel;
2620 DECLARE_MAC_BUF(mac);
2621 DECLARE_MAC_BUF(mac2);
2623 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2624 return; /* ignore ProbeResp to foreign address */
2626 beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2628 if (ieee80211_vif_is_mesh(&sdata->vif) && elems->mesh_id &&
2629 elems->mesh_config && mesh_matches_local(elems, dev)) {
2630 u64 rates = ieee80211_sta_get_rates(local, elems,
2633 mesh_neighbour_update(mgmt->sa, rates, dev,
2634 mesh_peer_accepts_plinks(elems, dev));
2639 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems->supp_rates &&
2640 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2641 (sta = sta_info_get(local, mgmt->sa))) {
2643 u64 supp_rates = ieee80211_sta_get_rates(local, elems,
2646 prev_rates = sta->supp_rates[rx_status->band];
2647 sta->supp_rates[rx_status->band] &= supp_rates;
2648 if (sta->supp_rates[rx_status->band] == 0) {
2649 /* No matching rates - this should not really happen.
2650 * Make sure that at least one rate is marked
2651 * supported to avoid issues with TX rate ctrl. */
2652 sta->supp_rates[rx_status->band] =
2653 sdata->u.sta.supp_rates_bits[rx_status->band];
2659 if (elems->ds_params && elems->ds_params_len == 1)
2660 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
2662 freq = rx_status->freq;
2664 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2666 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2669 #ifdef CONFIG_MAC80211_MESH
2670 if (elems->mesh_config)
2671 bss = ieee80211_rx_mesh_bss_get(dev, elems->mesh_id,
2672 elems->mesh_id_len, elems->mesh_config, freq);
2675 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
2676 elems->ssid, elems->ssid_len);
2678 #ifdef CONFIG_MAC80211_MESH
2679 if (elems->mesh_config)
2680 bss = ieee80211_rx_mesh_bss_add(dev, elems->mesh_id,
2681 elems->mesh_id_len, elems->mesh_config,
2682 elems->mesh_config_len, freq);
2685 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2686 elems->ssid, elems->ssid_len);
2691 /* TODO: order by RSSI? */
2692 spin_lock_bh(&local->sta_bss_lock);
2693 list_move_tail(&bss->list, &local->sta_bss_list);
2694 spin_unlock_bh(&local->sta_bss_lock);
2698 /* save the ERP value so that it is available at association time */
2699 if (elems->erp_info && elems->erp_info_len >= 1) {
2700 bss->erp_value = elems->erp_info[0];
2701 bss->has_erp_value = 1;
2704 if (elems->ht_cap_elem &&
2705 (!bss->ht_ie || bss->ht_ie_len != elems->ht_cap_elem_len ||
2706 memcmp(bss->ht_ie, elems->ht_cap_elem, elems->ht_cap_elem_len))) {
2708 bss->ht_ie = kmalloc(elems->ht_cap_elem_len + 2, GFP_ATOMIC);
2710 memcpy(bss->ht_ie, elems->ht_cap_elem - 2,
2711 elems->ht_cap_elem_len + 2);
2712 bss->ht_ie_len = elems->ht_cap_elem_len + 2;
2715 } else if (!elems->ht_cap_elem && bss->ht_ie) {
2721 if (elems->ht_info_elem &&
2723 bss->ht_add_ie_len != elems->ht_info_elem_len ||
2724 memcmp(bss->ht_add_ie, elems->ht_info_elem,
2725 elems->ht_info_elem_len))) {
2726 kfree(bss->ht_add_ie);
2728 kmalloc(elems->ht_info_elem_len + 2, GFP_ATOMIC);
2729 if (bss->ht_add_ie) {
2730 memcpy(bss->ht_add_ie, elems->ht_info_elem - 2,
2731 elems->ht_info_elem_len + 2);
2732 bss->ht_add_ie_len = elems->ht_info_elem_len + 2;
2734 bss->ht_add_ie_len = 0;
2735 } else if (!elems->ht_info_elem && bss->ht_add_ie) {
2736 kfree(bss->ht_add_ie);
2737 bss->ht_add_ie = NULL;
2738 bss->ht_add_ie_len = 0;
2741 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2742 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2744 bss->supp_rates_len = 0;
2745 if (elems->supp_rates) {
2746 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2747 if (clen > elems->supp_rates_len)
2748 clen = elems->supp_rates_len;
2749 memcpy(&bss->supp_rates[bss->supp_rates_len], elems->supp_rates,
2751 bss->supp_rates_len += clen;
2753 if (elems->ext_supp_rates) {
2754 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2755 if (clen > elems->ext_supp_rates_len)
2756 clen = elems->ext_supp_rates_len;
2757 memcpy(&bss->supp_rates[bss->supp_rates_len],
2758 elems->ext_supp_rates, clen);
2759 bss->supp_rates_len += clen;
2762 bss->band = rx_status->band;
2764 bss->timestamp = beacon_timestamp;
2765 bss->last_update = jiffies;
2766 bss->signal = rx_status->signal;
2767 bss->noise = rx_status->noise;
2768 bss->qual = rx_status->qual;
2769 if (!beacon && !bss->probe_resp)
2770 bss->probe_resp = true;
2773 * In STA mode, the remaining parameters should not be overridden
2774 * by beacons because they're not necessarily accurate there.
2776 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2777 bss->probe_resp && beacon) {
2778 ieee80211_rx_bss_put(dev, bss);
2783 (!bss->wpa_ie || bss->wpa_ie_len != elems->wpa_len ||
2784 memcmp(bss->wpa_ie, elems->wpa, elems->wpa_len))) {
2786 bss->wpa_ie = kmalloc(elems->wpa_len + 2, GFP_ATOMIC);
2788 memcpy(bss->wpa_ie, elems->wpa - 2, elems->wpa_len + 2);
2789 bss->wpa_ie_len = elems->wpa_len + 2;
2791 bss->wpa_ie_len = 0;
2792 } else if (!elems->wpa && bss->wpa_ie) {
2795 bss->wpa_ie_len = 0;
2799 (!bss->rsn_ie || bss->rsn_ie_len != elems->rsn_len ||
2800 memcmp(bss->rsn_ie, elems->rsn, elems->rsn_len))) {
2802 bss->rsn_ie = kmalloc(elems->rsn_len + 2, GFP_ATOMIC);
2804 memcpy(bss->rsn_ie, elems->rsn - 2, elems->rsn_len + 2);
2805 bss->rsn_ie_len = elems->rsn_len + 2;
2807 bss->rsn_ie_len = 0;
2808 } else if (!elems->rsn && bss->rsn_ie) {
2811 bss->rsn_ie_len = 0;
2816 * http://www.wipo.int/pctdb/en/wo.jsp?wo=2007047181&IA=WO2007047181&DISPLAY=DESC
2820 * In particular, "Wi-Fi CERTIFIED for WMM - Support for Multimedia
2821 * Applications with Quality of Service in Wi-Fi Networks," Wi- Fi
2822 * Alliance (September 1, 2004) is incorporated by reference herein.
2823 * The inclusion of the WMM Parameters in probe responses and
2824 * association responses is mandatory for WMM enabled networks. The
2825 * inclusion of the WMM Parameters in beacons, however, is optional.
2828 if (elems->wmm_param &&
2829 (!bss->wmm_ie || bss->wmm_ie_len != elems->wmm_param_len ||
2830 memcmp(bss->wmm_ie, elems->wmm_param, elems->wmm_param_len))) {
2832 bss->wmm_ie = kmalloc(elems->wmm_param_len + 2, GFP_ATOMIC);
2834 memcpy(bss->wmm_ie, elems->wmm_param - 2,
2835 elems->wmm_param_len + 2);
2836 bss->wmm_ie_len = elems->wmm_param_len + 2;
2838 bss->wmm_ie_len = 0;
2839 } else if (elems->wmm_info &&
2840 (!bss->wmm_ie || bss->wmm_ie_len != elems->wmm_info_len ||
2841 memcmp(bss->wmm_ie, elems->wmm_info,
2842 elems->wmm_info_len))) {
2843 /* As for certain AP's Fifth bit is not set in WMM IE in
2844 * beacon frames.So while parsing the beacon frame the
2845 * wmm_info structure is used instead of wmm_param.
2846 * wmm_info structure was never used to set bss->wmm_ie.
2847 * This code fixes this problem by copying the WME
2848 * information from wmm_info to bss->wmm_ie and enabling
2849 * n-band association.
2852 bss->wmm_ie = kmalloc(elems->wmm_info_len + 2, GFP_ATOMIC);
2854 memcpy(bss->wmm_ie, elems->wmm_info - 2,
2855 elems->wmm_info_len + 2);
2856 bss->wmm_ie_len = elems->wmm_info_len + 2;
2858 bss->wmm_ie_len = 0;
2859 } else if (!elems->wmm_param && !elems->wmm_info && bss->wmm_ie) {
2862 bss->wmm_ie_len = 0;
2865 /* check if we need to merge IBSS */
2866 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2867 !local->sta_sw_scanning && !local->sta_hw_scanning &&
2868 bss->capability & WLAN_CAPABILITY_IBSS &&
2869 bss->freq == local->oper_channel->center_freq &&
2870 elems->ssid_len == sdata->u.sta.ssid_len &&
2871 memcmp(elems->ssid, sdata->u.sta.ssid,
2872 sdata->u.sta.ssid_len) == 0) {
2873 if (rx_status->flag & RX_FLAG_TSFT) {
2874 /* in order for correct IBSS merging we need mactime
2876 * since mactime is defined as the time the first data
2877 * symbol of the frame hits the PHY, and the timestamp
2878 * of the beacon is defined as "the time that the data
2879 * symbol containing the first bit of the timestamp is
2880 * transmitted to the PHY plus the transmitting STA’s
2881 * delays through its local PHY from the MAC-PHY
2882 * interface to its interface with the WM"
2883 * (802.11 11.1.2) - equals the time this bit arrives at
2884 * the receiver - we have to take into account the
2885 * offset between the two.
2886 * e.g: at 1 MBit that means mactime is 192 usec earlier
2887 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2889 int rate = local->hw.wiphy->bands[rx_status->band]->
2890 bitrates[rx_status->rate_idx].bitrate;
2891 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2892 } else if (local && local->ops && local->ops->get_tsf)
2893 /* second best option: get current TSF */
2894 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2896 /* can't merge without knowing the TSF */
2897 rx_timestamp = -1LLU;
2898 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2899 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2900 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2901 print_mac(mac, mgmt->sa),
2902 print_mac(mac2, mgmt->bssid),
2903 (unsigned long long)rx_timestamp,
2904 (unsigned long long)beacon_timestamp,
2905 (unsigned long long)(rx_timestamp - beacon_timestamp),
2907 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2908 if (beacon_timestamp > rx_timestamp) {
2909 #ifndef CONFIG_MAC80211_IBSS_DEBUG
2910 printk(KERN_DEBUG "%s: beacon TSF higher than "
2911 "local TSF - IBSS merge with BSSID %s\n",
2912 dev->name, print_mac(mac, mgmt->bssid));
2914 ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2915 ieee80211_ibss_add_sta(dev, NULL,
2916 mgmt->bssid, mgmt->sa,
2917 BIT(rx_status->rate_idx));
2921 ieee80211_rx_bss_put(dev, bss);
2925 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2926 struct ieee80211_mgmt *mgmt,
2928 struct ieee80211_rx_status *rx_status)
2931 struct ieee802_11_elems elems;
2933 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2937 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2940 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, &elems, 0);
2944 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2945 struct ieee80211_mgmt *mgmt,
2947 struct ieee80211_rx_status *rx_status)
2949 struct ieee80211_sub_if_data *sdata;
2950 struct ieee80211_if_sta *ifsta;
2952 struct ieee802_11_elems elems;
2953 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2954 struct ieee80211_conf *conf = &local->hw.conf;
2957 /* Process beacon from the current BSS */
2958 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2962 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2964 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, &elems, 1);
2966 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2967 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2969 ifsta = &sdata->u.sta;
2971 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2972 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2975 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2976 elems.wmm_param_len);
2978 /* Do not send changes to driver if we are scanning. This removes
2979 * requirement that driver's bss_info_changed function needs to be
2981 if (local->sta_sw_scanning || local->sta_hw_scanning)
2984 if (elems.erp_info && elems.erp_info_len >= 1)
2985 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2987 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
2988 changed |= ieee80211_handle_protect_preamb(sdata, false,
2989 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
2992 if (elems.ht_cap_elem && elems.ht_info_elem &&
2993 elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2994 struct ieee80211_ht_bss_info bss_info;
2996 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2997 (struct ieee80211_ht_addt_info *)
2998 elems.ht_info_elem, &bss_info);
2999 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
3003 ieee80211_bss_info_change_notify(sdata, changed);
3007 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
3008 struct ieee80211_if_sta *ifsta,
3009 struct ieee80211_mgmt *mgmt,
3011 struct ieee80211_rx_status *rx_status)
3013 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3014 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3016 struct sk_buff *skb;
3017 struct ieee80211_mgmt *resp;
3019 DECLARE_MAC_BUF(mac);
3020 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3021 DECLARE_MAC_BUF(mac2);
3022 DECLARE_MAC_BUF(mac3);
3025 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
3026 ifsta->state != IEEE80211_IBSS_JOINED ||
3027 len < 24 + 2 || !ifsta->probe_resp)
3030 if (local->ops->tx_last_beacon)
3031 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
3035 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3036 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
3037 "%s (tx_last_beacon=%d)\n",
3038 dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
3039 print_mac(mac3, mgmt->bssid), tx_last_beacon);
3040 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3042 if (!tx_last_beacon)
3045 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
3046 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
3049 end = ((u8 *) mgmt) + len;
3050 pos = mgmt->u.probe_req.variable;
3051 if (pos[0] != WLAN_EID_SSID ||
3052 pos + 2 + pos[1] > end) {
3053 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3054 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
3056 dev->name, print_mac(mac, mgmt->sa));
3061 (pos[1] != ifsta->ssid_len ||
3062 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
3063 /* Ignore ProbeReq for foreign SSID */
3067 /* Reply with ProbeResp */
3068 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
3072 resp = (struct ieee80211_mgmt *) skb->data;
3073 memcpy(resp->da, mgmt->sa, ETH_ALEN);
3074 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3075 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
3076 dev->name, print_mac(mac, resp->da));
3077 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3078 ieee80211_sta_tx(dev, skb, 0);
3081 static void ieee80211_rx_mgmt_action(struct net_device *dev,
3082 struct ieee80211_if_sta *ifsta,
3083 struct ieee80211_mgmt *mgmt,
3085 struct ieee80211_rx_status *rx_status)
3087 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3088 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3090 if (len < IEEE80211_MIN_ACTION_SIZE)
3093 switch (mgmt->u.action.category) {
3094 case WLAN_CATEGORY_SPECTRUM_MGMT:
3095 if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ)
3097 switch (mgmt->u.action.u.chan_switch.action_code) {
3098 case WLAN_ACTION_SPCT_MSR_REQ:
3099 if (len < (IEEE80211_MIN_ACTION_SIZE +
3100 sizeof(mgmt->u.action.u.measurement)))
3102 ieee80211_sta_process_measurement_req(dev, mgmt, len);
3106 case WLAN_CATEGORY_BACK:
3107 switch (mgmt->u.action.u.addba_req.action_code) {
3108 case WLAN_ACTION_ADDBA_REQ:
3109 if (len < (IEEE80211_MIN_ACTION_SIZE +
3110 sizeof(mgmt->u.action.u.addba_req)))
3112 ieee80211_sta_process_addba_request(dev, mgmt, len);
3114 case WLAN_ACTION_ADDBA_RESP:
3115 if (len < (IEEE80211_MIN_ACTION_SIZE +
3116 sizeof(mgmt->u.action.u.addba_resp)))
3118 ieee80211_sta_process_addba_resp(dev, mgmt, len);
3120 case WLAN_ACTION_DELBA:
3121 if (len < (IEEE80211_MIN_ACTION_SIZE +
3122 sizeof(mgmt->u.action.u.delba)))
3124 ieee80211_sta_process_delba(dev, mgmt, len);
3128 case PLINK_CATEGORY:
3129 if (ieee80211_vif_is_mesh(&sdata->vif))
3130 mesh_rx_plink_frame(dev, mgmt, len, rx_status);
3132 case MESH_PATH_SEL_CATEGORY:
3133 if (ieee80211_vif_is_mesh(&sdata->vif))
3134 mesh_rx_path_sel_frame(dev, mgmt, len);
3139 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
3140 struct ieee80211_rx_status *rx_status)
3142 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3143 struct ieee80211_sub_if_data *sdata;
3144 struct ieee80211_if_sta *ifsta;
3145 struct ieee80211_mgmt *mgmt;
3151 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3152 ifsta = &sdata->u.sta;
3154 mgmt = (struct ieee80211_mgmt *) skb->data;
3155 fc = le16_to_cpu(mgmt->frame_control);
3157 switch (fc & IEEE80211_FCTL_STYPE) {
3158 case IEEE80211_STYPE_PROBE_REQ:
3159 case IEEE80211_STYPE_PROBE_RESP:
3160 case IEEE80211_STYPE_BEACON:
3161 case IEEE80211_STYPE_ACTION:
3162 memcpy(skb->cb, rx_status, sizeof(*rx_status));
3163 case IEEE80211_STYPE_AUTH:
3164 case IEEE80211_STYPE_ASSOC_RESP:
3165 case IEEE80211_STYPE_REASSOC_RESP:
3166 case IEEE80211_STYPE_DEAUTH:
3167 case IEEE80211_STYPE_DISASSOC:
3168 skb_queue_tail(&ifsta->skb_queue, skb);
3169 queue_work(local->hw.workqueue, &ifsta->work);
3178 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
3179 struct sk_buff *skb)
3181 struct ieee80211_rx_status *rx_status;
3182 struct ieee80211_sub_if_data *sdata;
3183 struct ieee80211_if_sta *ifsta;
3184 struct ieee80211_mgmt *mgmt;
3187 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3188 ifsta = &sdata->u.sta;
3190 rx_status = (struct ieee80211_rx_status *) skb->cb;
3191 mgmt = (struct ieee80211_mgmt *) skb->data;
3192 fc = le16_to_cpu(mgmt->frame_control);
3194 switch (fc & IEEE80211_FCTL_STYPE) {
3195 case IEEE80211_STYPE_PROBE_REQ:
3196 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
3199 case IEEE80211_STYPE_PROBE_RESP:
3200 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
3202 case IEEE80211_STYPE_BEACON:
3203 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
3205 case IEEE80211_STYPE_AUTH:
3206 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
3208 case IEEE80211_STYPE_ASSOC_RESP:
3209 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
3211 case IEEE80211_STYPE_REASSOC_RESP:
3212 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
3214 case IEEE80211_STYPE_DEAUTH:
3215 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
3217 case IEEE80211_STYPE_DISASSOC:
3218 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
3220 case IEEE80211_STYPE_ACTION:
3221 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len, rx_status);
3230 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
3231 struct ieee80211_rx_status *rx_status)
3233 struct ieee80211_mgmt *mgmt;
3237 return RX_DROP_UNUSABLE;
3239 mgmt = (struct ieee80211_mgmt *) skb->data;
3240 fc = mgmt->frame_control;
3242 if (ieee80211_is_ctl(fc))
3246 return RX_DROP_MONITOR;
3248 if (ieee80211_is_probe_resp(fc)) {
3249 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
3254 if (ieee80211_is_beacon(fc)) {
3255 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
3264 static int ieee80211_sta_active_ibss(struct net_device *dev)
3266 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3268 struct sta_info *sta;
3269 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3273 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3274 if (sta->sdata == sdata &&
3275 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3288 static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time)
3290 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3291 struct sta_info *sta, *tmp;
3292 LIST_HEAD(tmp_list);
3293 DECLARE_MAC_BUF(mac);
3294 unsigned long flags;
3296 spin_lock_irqsave(&local->sta_lock, flags);
3297 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
3298 if (time_after(jiffies, sta->last_rx + exp_time)) {
3299 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3300 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
3301 dev->name, print_mac(mac, sta->addr));
3303 __sta_info_unlink(&sta);
3305 list_add(&sta->list, &tmp_list);
3307 spin_unlock_irqrestore(&local->sta_lock, flags);
3309 list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3310 sta_info_destroy(sta);
3314 static void ieee80211_sta_merge_ibss(struct net_device *dev,
3315 struct ieee80211_if_sta *ifsta)
3317 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3319 ieee80211_sta_expire(dev, IEEE80211_IBSS_INACTIVITY_LIMIT);
3320 if (ieee80211_sta_active_ibss(dev))
3323 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3324 "IBSS networks with same SSID (merge)\n", dev->name);
3325 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
3329 #ifdef CONFIG_MAC80211_MESH
3330 static void ieee80211_mesh_housekeeping(struct net_device *dev,
3331 struct ieee80211_if_sta *ifsta)
3333 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3336 ieee80211_sta_expire(dev, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3337 mesh_path_expire(dev);
3339 free_plinks = mesh_plink_availables(sdata);
3340 if (free_plinks != sdata->u.sta.accepting_plinks)
3341 ieee80211_if_config_beacon(dev);
3343 mod_timer(&ifsta->timer, jiffies +
3344 IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3348 void ieee80211_start_mesh(struct net_device *dev)
3350 struct ieee80211_if_sta *ifsta;
3351 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3352 ifsta = &sdata->u.sta;
3353 ifsta->state = IEEE80211_MESH_UP;
3354 ieee80211_sta_timer((unsigned long)sdata);
3359 void ieee80211_sta_timer(unsigned long data)
3361 struct ieee80211_sub_if_data *sdata =
3362 (struct ieee80211_sub_if_data *) data;
3363 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3364 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
3366 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3367 queue_work(local->hw.workqueue, &ifsta->work);
3370 void ieee80211_sta_work(struct work_struct *work)
3372 struct ieee80211_sub_if_data *sdata =
3373 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3374 struct net_device *dev = sdata->dev;
3375 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3376 struct ieee80211_if_sta *ifsta;
3377 struct sk_buff *skb;
3379 if (!netif_running(dev))
3382 if (local->sta_sw_scanning || local->sta_hw_scanning)
3385 if (WARN_ON(sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3386 sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3387 sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT))
3389 ifsta = &sdata->u.sta;
3391 while ((skb = skb_dequeue(&ifsta->skb_queue)))
3392 ieee80211_sta_rx_queued_mgmt(dev, skb);
3394 #ifdef CONFIG_MAC80211_MESH
3395 if (ifsta->preq_queue_len &&
3397 ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3398 mesh_path_start_discovery(dev);
3401 if (ifsta->state != IEEE80211_AUTHENTICATE &&
3402 ifsta->state != IEEE80211_ASSOCIATE &&
3403 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3404 if (ifsta->scan_ssid_len)
3405 ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
3407 ieee80211_sta_start_scan(dev, NULL, 0);
3411 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3412 if (ieee80211_sta_config_auth(dev, ifsta))
3414 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3415 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3418 switch (ifsta->state) {
3419 case IEEE80211_DISABLED:
3421 case IEEE80211_AUTHENTICATE:
3422 ieee80211_authenticate(dev, ifsta);
3424 case IEEE80211_ASSOCIATE:
3425 ieee80211_associate(dev, ifsta);
3427 case IEEE80211_ASSOCIATED:
3428 ieee80211_associated(dev, ifsta);
3430 case IEEE80211_IBSS_SEARCH:
3431 ieee80211_sta_find_ibss(dev, ifsta);
3433 case IEEE80211_IBSS_JOINED:
3434 ieee80211_sta_merge_ibss(dev, ifsta);
3436 #ifdef CONFIG_MAC80211_MESH
3437 case IEEE80211_MESH_UP:
3438 ieee80211_mesh_housekeeping(dev, ifsta);
3446 if (ieee80211_privacy_mismatch(dev, ifsta)) {
3447 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3448 "mixed-cell disabled - disassociate\n", dev->name);
3450 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
3451 ieee80211_set_disassoc(dev, ifsta, 0);
3456 static void ieee80211_sta_reset_auth(struct net_device *dev,
3457 struct ieee80211_if_sta *ifsta)
3459 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3461 if (local->ops->reset_tsf) {
3462 /* Reset own TSF to allow time synchronization work. */
3463 local->ops->reset_tsf(local_to_hw(local));
3466 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3469 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3470 ifsta->auth_alg = WLAN_AUTH_OPEN;
3471 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3472 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3473 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3474 ifsta->auth_alg = WLAN_AUTH_LEAP;
3476 ifsta->auth_alg = WLAN_AUTH_OPEN;
3477 ifsta->auth_transaction = -1;
3478 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3479 ifsta->auth_tries = ifsta->assoc_tries = 0;
3480 netif_carrier_off(dev);
3484 void ieee80211_sta_req_auth(struct net_device *dev,
3485 struct ieee80211_if_sta *ifsta)
3487 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3488 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3490 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3493 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3494 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3495 (ifsta->flags & (IEEE80211_STA_SSID_SET |
3496 IEEE80211_STA_AUTO_SSID_SEL))) {
3497 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3498 queue_work(local->hw.workqueue, &ifsta->work);
3502 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3503 const char *ssid, int ssid_len)
3505 int tmp, hidden_ssid;
3507 if (ssid_len == ifsta->ssid_len &&
3508 !memcmp(ifsta->ssid, ssid, ssid_len))
3511 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
3517 if (ssid[tmp] != '\0') {
3523 if (hidden_ssid && ifsta->ssid_len == ssid_len)
3526 if (ssid_len == 1 && ssid[0] == ' ')
3532 static int ieee80211_sta_config_auth(struct net_device *dev,
3533 struct ieee80211_if_sta *ifsta)
3535 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3536 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3537 struct ieee80211_sta_bss *bss, *selected = NULL;
3538 int top_rssi = 0, freq;
3540 spin_lock_bh(&local->sta_bss_lock);
3541 freq = local->oper_channel->center_freq;
3542 list_for_each_entry(bss, &local->sta_bss_list, list) {
3543 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3546 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3547 IEEE80211_STA_AUTO_BSSID_SEL |
3548 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
3549 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3550 !!sdata->default_key))
3553 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3557 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3558 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3561 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3562 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3565 if (!selected || top_rssi < bss->signal) {
3567 top_rssi = bss->signal;
3571 atomic_inc(&selected->users);
3572 spin_unlock_bh(&local->sta_bss_lock);
3575 ieee80211_set_freq(dev, selected->freq);
3576 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3577 ieee80211_sta_set_ssid(dev, selected->ssid,
3578 selected->ssid_len);
3579 ieee80211_sta_set_bssid(dev, selected->bssid);
3580 ieee80211_sta_def_wmm_params(dev, selected, 0);
3581 ieee80211_rx_bss_put(dev, selected);
3582 ifsta->state = IEEE80211_AUTHENTICATE;
3583 ieee80211_sta_reset_auth(dev, ifsta);
3586 if (ifsta->state != IEEE80211_AUTHENTICATE) {
3587 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3588 ieee80211_sta_start_scan(dev, NULL, 0);
3590 ieee80211_sta_start_scan(dev, ifsta->ssid,
3592 ifsta->state = IEEE80211_AUTHENTICATE;
3593 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3595 ifsta->state = IEEE80211_DISABLED;
3601 static int ieee80211_sta_create_ibss(struct net_device *dev,
3602 struct ieee80211_if_sta *ifsta)
3604 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3605 struct ieee80211_sta_bss *bss;
3606 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3607 struct ieee80211_supported_band *sband;
3608 u8 bssid[ETH_ALEN], *pos;
3611 DECLARE_MAC_BUF(mac);
3614 /* Easier testing, use fixed BSSID. */
3615 memset(bssid, 0xfe, ETH_ALEN);
3617 /* Generate random, not broadcast, locally administered BSSID. Mix in
3618 * own MAC address to make sure that devices that do not have proper
3619 * random number generator get different BSSID. */
3620 get_random_bytes(bssid, ETH_ALEN);
3621 for (i = 0; i < ETH_ALEN; i++)
3622 bssid[i] ^= dev->dev_addr[i];
3627 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3628 dev->name, print_mac(mac, bssid));
3630 bss = ieee80211_rx_bss_add(dev, bssid,
3631 local->hw.conf.channel->center_freq,
3632 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3636 bss->band = local->hw.conf.channel->band;
3637 sband = local->hw.wiphy->bands[bss->band];
3639 if (local->hw.conf.beacon_int == 0)
3640 local->hw.conf.beacon_int = 100;
3641 bss->beacon_int = local->hw.conf.beacon_int;
3642 bss->last_update = jiffies;
3643 bss->capability = WLAN_CAPABILITY_IBSS;
3645 if (sdata->default_key)
3646 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3648 sdata->drop_unencrypted = 0;
3650 bss->supp_rates_len = sband->n_bitrates;
3651 pos = bss->supp_rates;
3652 for (i = 0; i < sband->n_bitrates; i++) {
3653 int rate = sband->bitrates[i].bitrate;
3654 *pos++ = (u8) (rate / 5);
3657 ret = ieee80211_sta_join_ibss(dev, ifsta, bss);
3658 ieee80211_rx_bss_put(dev, bss);
3663 static int ieee80211_sta_find_ibss(struct net_device *dev,
3664 struct ieee80211_if_sta *ifsta)
3666 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3667 struct ieee80211_sta_bss *bss;
3671 DECLARE_MAC_BUF(mac);
3672 DECLARE_MAC_BUF(mac2);
3674 if (ifsta->ssid_len == 0)
3677 active_ibss = ieee80211_sta_active_ibss(dev);
3678 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3679 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3680 dev->name, active_ibss);
3681 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3682 spin_lock_bh(&local->sta_bss_lock);
3683 list_for_each_entry(bss, &local->sta_bss_list, list) {
3684 if (ifsta->ssid_len != bss->ssid_len ||
3685 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3686 || !(bss->capability & WLAN_CAPABILITY_IBSS))
3688 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3689 printk(KERN_DEBUG " bssid=%s found\n",
3690 print_mac(mac, bss->bssid));
3691 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3692 memcpy(bssid, bss->bssid, ETH_ALEN);
3694 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3697 spin_unlock_bh(&local->sta_bss_lock);
3699 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3701 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
3702 "%s\n", print_mac(mac, bssid),
3703 print_mac(mac2, ifsta->bssid));
3704 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3705 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
3706 (bss = ieee80211_rx_bss_get(dev, bssid,
3707 local->hw.conf.channel->center_freq,
3708 ifsta->ssid, ifsta->ssid_len))) {
3710 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3711 " based on configured SSID\n",
3712 dev->name, print_mac(mac, bssid));
3713 ret = ieee80211_sta_join_ibss(dev, ifsta, bss);
3714 ieee80211_rx_bss_put(dev, bss);
3717 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3718 printk(KERN_DEBUG " did not try to join ibss\n");
3719 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3721 /* Selected IBSS not found in current scan results - try to scan */
3722 if (ifsta->state == IEEE80211_IBSS_JOINED &&
3723 !ieee80211_sta_active_ibss(dev)) {
3724 mod_timer(&ifsta->timer, jiffies +
3725 IEEE80211_IBSS_MERGE_INTERVAL);
3726 } else if (time_after(jiffies, local->last_scan_completed +
3727 IEEE80211_SCAN_INTERVAL)) {
3728 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3729 "join\n", dev->name);
3730 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3732 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3733 int interval = IEEE80211_SCAN_INTERVAL;
3735 if (time_after(jiffies, ifsta->ibss_join_req +
3736 IEEE80211_IBSS_JOIN_TIMEOUT)) {
3737 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3738 (!(local->oper_channel->flags &
3739 IEEE80211_CHAN_NO_IBSS)))
3740 return ieee80211_sta_create_ibss(dev, ifsta);
3741 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3742 printk(KERN_DEBUG "%s: IBSS not allowed on"
3743 " %d MHz\n", dev->name,
3744 local->hw.conf.channel->center_freq);
3747 /* No IBSS found - decrease scan interval and continue
3749 interval = IEEE80211_SCAN_INTERVAL_SLOW;
3752 ifsta->state = IEEE80211_IBSS_SEARCH;
3753 mod_timer(&ifsta->timer, jiffies + interval);
3761 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3763 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3764 struct ieee80211_if_sta *ifsta;
3766 if (len > IEEE80211_MAX_SSID_LEN)
3769 ifsta = &sdata->u.sta;
3771 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3772 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3773 memcpy(ifsta->ssid, ssid, len);
3774 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3775 ifsta->ssid_len = len;
3778 ifsta->flags |= IEEE80211_STA_SSID_SET;
3780 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3781 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3782 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3783 ifsta->ibss_join_req = jiffies;
3784 ifsta->state = IEEE80211_IBSS_SEARCH;
3785 return ieee80211_sta_find_ibss(dev, ifsta);
3791 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3793 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3794 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3795 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3796 *len = ifsta->ssid_len;
3801 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3803 struct ieee80211_sub_if_data *sdata;
3804 struct ieee80211_if_sta *ifsta;
3807 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3808 ifsta = &sdata->u.sta;
3810 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3811 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3812 res = ieee80211_if_config(dev);
3814 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3815 "the low-level driver\n", dev->name);
3820 if (is_valid_ether_addr(bssid))
3821 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3823 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3829 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3830 struct ieee80211_sub_if_data *sdata,
3833 struct sk_buff *skb;
3834 struct ieee80211_hdr *nullfunc;
3837 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3839 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3840 "frame\n", sdata->dev->name);
3843 skb_reserve(skb, local->hw.extra_tx_headroom);
3845 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3846 memset(nullfunc, 0, 24);
3847 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3848 IEEE80211_FCTL_TODS);
3850 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
3851 nullfunc->frame_control = fc;
3852 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3853 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3854 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3856 ieee80211_sta_tx(sdata->dev, skb, 0);
3860 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3862 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3863 ieee80211_vif_is_mesh(&sdata->vif))
3864 ieee80211_sta_timer((unsigned long)sdata);
3867 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3869 struct ieee80211_local *local = hw_to_local(hw);
3870 struct net_device *dev = local->scan_dev;
3871 struct ieee80211_sub_if_data *sdata;
3872 union iwreq_data wrqu;
3874 local->last_scan_completed = jiffies;
3875 memset(&wrqu, 0, sizeof(wrqu));
3876 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3878 if (local->sta_hw_scanning) {
3879 local->sta_hw_scanning = 0;
3880 if (ieee80211_hw_config(local))
3881 printk(KERN_DEBUG "%s: failed to restore operational "
3882 "channel after scan\n", dev->name);
3883 /* Restart STA timer for HW scan case */
3885 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3886 ieee80211_restart_sta_timer(sdata);
3892 local->sta_sw_scanning = 0;
3893 if (ieee80211_hw_config(local))
3894 printk(KERN_DEBUG "%s: failed to restore operational "
3895 "channel after scan\n", dev->name);
3898 netif_tx_lock_bh(local->mdev);
3899 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3900 local->ops->configure_filter(local_to_hw(local),
3901 FIF_BCN_PRBRESP_PROMISC,
3902 &local->filter_flags,
3903 local->mdev->mc_count,
3904 local->mdev->mc_list);
3906 netif_tx_unlock_bh(local->mdev);
3909 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3911 /* No need to wake the master device. */
3912 if (sdata->dev == local->mdev)
3915 /* Tell AP we're back */
3916 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3917 sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3918 ieee80211_send_nullfunc(local, sdata, 0);
3920 ieee80211_restart_sta_timer(sdata);
3922 netif_wake_queue(sdata->dev);
3927 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3928 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3929 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3930 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3931 (!ifsta->state == IEEE80211_IBSS_JOINED &&
3932 !ieee80211_sta_active_ibss(dev)))
3933 ieee80211_sta_find_ibss(dev, ifsta);
3936 EXPORT_SYMBOL(ieee80211_scan_completed);
3938 void ieee80211_sta_scan_work(struct work_struct *work)
3940 struct ieee80211_local *local =
3941 container_of(work, struct ieee80211_local, scan_work.work);
3942 struct net_device *dev = local->scan_dev;
3943 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3944 struct ieee80211_supported_band *sband;
3945 struct ieee80211_channel *chan;
3947 unsigned long next_delay = 0;
3949 if (!local->sta_sw_scanning)
3952 switch (local->scan_state) {
3953 case SCAN_SET_CHANNEL:
3955 * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3956 * after we successfully scanned the last channel of the last
3957 * band (and the last band is supported by the hw)
3959 if (local->scan_band < IEEE80211_NUM_BANDS)
3960 sband = local->hw.wiphy->bands[local->scan_band];
3965 * If we are at an unsupported band and have more bands
3966 * left to scan, advance to the next supported one.
3968 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
3970 sband = local->hw.wiphy->bands[local->scan_band];
3971 local->scan_channel_idx = 0;
3974 /* if no more bands/channels left, complete scan */
3975 if (!sband || local->scan_channel_idx >= sband->n_channels) {
3976 ieee80211_scan_completed(local_to_hw(local));
3980 chan = &sband->channels[local->scan_channel_idx];
3982 if (chan->flags & IEEE80211_CHAN_DISABLED ||
3983 (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3984 chan->flags & IEEE80211_CHAN_NO_IBSS))
3988 local->scan_channel = chan;
3989 if (ieee80211_hw_config(local)) {
3990 printk(KERN_DEBUG "%s: failed to set freq to "
3991 "%d MHz for scan\n", dev->name,
3997 /* advance state machine to next channel/band */
3998 local->scan_channel_idx++;
3999 if (local->scan_channel_idx >= sband->n_channels) {
4001 * scan_band may end up == IEEE80211_NUM_BANDS, but
4002 * we'll catch that case above and complete the scan
4003 * if that is the case.
4006 local->scan_channel_idx = 0;
4012 next_delay = IEEE80211_PROBE_DELAY +
4013 usecs_to_jiffies(local->hw.channel_change_time);
4014 local->scan_state = SCAN_SEND_PROBE;
4016 case SCAN_SEND_PROBE:
4017 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
4018 local->scan_state = SCAN_SET_CHANNEL;
4020 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
4022 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
4023 local->scan_ssid_len);
4024 next_delay = IEEE80211_CHANNEL_TIME;
4028 if (local->sta_sw_scanning)
4029 queue_delayed_work(local->hw.workqueue, &local->scan_work,
4034 static int ieee80211_sta_start_scan(struct net_device *dev,
4035 u8 *ssid, size_t ssid_len)
4037 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4038 struct ieee80211_sub_if_data *sdata;
4040 if (ssid_len > IEEE80211_MAX_SSID_LEN)
4043 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
4044 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
4047 * ScanType: ACTIVE, PASSIVE
4048 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
4049 * a Probe frame during active scanning
4051 * MinChannelTime (>= ProbeDelay), in TU
4052 * MaxChannelTime: (>= MinChannelTime), in TU
4055 /* MLME-SCAN.confirm
4057 * ResultCode: SUCCESS, INVALID_PARAMETERS
4060 if (local->sta_sw_scanning || local->sta_hw_scanning) {
4061 if (local->scan_dev == dev)
4066 if (local->ops->hw_scan) {
4067 int rc = local->ops->hw_scan(local_to_hw(local),
4070 local->sta_hw_scanning = 1;
4071 local->scan_dev = dev;
4076 local->sta_sw_scanning = 1;
4079 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4081 /* Don't stop the master interface, otherwise we can't transmit
4083 if (sdata->dev == local->mdev)
4086 netif_stop_queue(sdata->dev);
4087 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
4088 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
4089 ieee80211_send_nullfunc(local, sdata, 1);
4094 local->scan_ssid_len = ssid_len;
4095 memcpy(local->scan_ssid, ssid, ssid_len);
4097 local->scan_ssid_len = 0;
4098 local->scan_state = SCAN_SET_CHANNEL;
4099 local->scan_channel_idx = 0;
4100 local->scan_band = IEEE80211_BAND_2GHZ;
4101 local->scan_dev = dev;
4103 netif_tx_lock_bh(local->mdev);
4104 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
4105 local->ops->configure_filter(local_to_hw(local),
4106 FIF_BCN_PRBRESP_PROMISC,
4107 &local->filter_flags,
4108 local->mdev->mc_count,
4109 local->mdev->mc_list);
4110 netif_tx_unlock_bh(local->mdev);
4112 /* TODO: start scan as soon as all nullfunc frames are ACKed */
4113 queue_delayed_work(local->hw.workqueue, &local->scan_work,
4114 IEEE80211_CHANNEL_TIME);
4120 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
4122 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4123 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4124 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4126 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4127 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
4129 if (local->sta_sw_scanning || local->sta_hw_scanning) {
4130 if (local->scan_dev == dev)
4135 ifsta->scan_ssid_len = ssid_len;
4137 memcpy(ifsta->scan_ssid, ssid, ssid_len);
4138 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
4139 queue_work(local->hw.workqueue, &ifsta->work);
4144 ieee80211_sta_scan_result(struct net_device *dev,
4145 struct iw_request_info *info,
4146 struct ieee80211_sta_bss *bss,
4147 char *current_ev, char *end_buf)
4149 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4150 struct iw_event iwe;
4152 if (time_after(jiffies,
4153 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
4156 memset(&iwe, 0, sizeof(iwe));
4157 iwe.cmd = SIOCGIWAP;
4158 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
4159 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
4160 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4163 memset(&iwe, 0, sizeof(iwe));
4164 iwe.cmd = SIOCGIWESSID;
4165 if (bss_mesh_cfg(bss)) {
4166 iwe.u.data.length = bss_mesh_id_len(bss);
4167 iwe.u.data.flags = 1;
4168 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4169 &iwe, bss_mesh_id(bss));
4171 iwe.u.data.length = bss->ssid_len;
4172 iwe.u.data.flags = 1;
4173 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4177 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
4178 || bss_mesh_cfg(bss)) {
4179 memset(&iwe, 0, sizeof(iwe));
4180 iwe.cmd = SIOCGIWMODE;
4181 if (bss_mesh_cfg(bss))
4182 iwe.u.mode = IW_MODE_MESH;
4183 else if (bss->capability & WLAN_CAPABILITY_ESS)
4184 iwe.u.mode = IW_MODE_MASTER;
4186 iwe.u.mode = IW_MODE_ADHOC;
4187 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
4188 &iwe, IW_EV_UINT_LEN);
4191 memset(&iwe, 0, sizeof(iwe));
4192 iwe.cmd = SIOCGIWFREQ;
4193 iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
4195 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4198 memset(&iwe, 0, sizeof(iwe));
4199 iwe.cmd = SIOCGIWFREQ;
4200 iwe.u.freq.m = bss->freq;
4202 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4204 memset(&iwe, 0, sizeof(iwe));
4206 iwe.u.qual.qual = bss->qual;
4207 iwe.u.qual.level = bss->signal;
4208 iwe.u.qual.noise = bss->noise;
4209 iwe.u.qual.updated = local->wstats_flags;
4210 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4213 memset(&iwe, 0, sizeof(iwe));
4214 iwe.cmd = SIOCGIWENCODE;
4215 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
4216 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4218 iwe.u.data.flags = IW_ENCODE_DISABLED;
4219 iwe.u.data.length = 0;
4220 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4223 if (bss && bss->wpa_ie) {
4224 memset(&iwe, 0, sizeof(iwe));
4225 iwe.cmd = IWEVGENIE;
4226 iwe.u.data.length = bss->wpa_ie_len;
4227 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4231 if (bss && bss->rsn_ie) {
4232 memset(&iwe, 0, sizeof(iwe));
4233 iwe.cmd = IWEVGENIE;
4234 iwe.u.data.length = bss->rsn_ie_len;
4235 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4239 if (bss && bss->ht_ie) {
4240 memset(&iwe, 0, sizeof(iwe));
4241 iwe.cmd = IWEVGENIE;
4242 iwe.u.data.length = bss->ht_ie_len;
4243 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4247 if (bss && bss->supp_rates_len > 0) {
4248 /* display all supported rates in readable format */
4249 char *p = current_ev + iwe_stream_lcp_len(info);
4252 memset(&iwe, 0, sizeof(iwe));
4253 iwe.cmd = SIOCGIWRATE;
4254 /* Those two flags are ignored... */
4255 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4257 for (i = 0; i < bss->supp_rates_len; i++) {
4258 iwe.u.bitrate.value = ((bss->supp_rates[i] &
4260 p = iwe_stream_add_value(info, current_ev, p,
4261 end_buf, &iwe, IW_EV_PARAM_LEN);
4268 buf = kmalloc(30, GFP_ATOMIC);
4270 memset(&iwe, 0, sizeof(iwe));
4271 iwe.cmd = IWEVCUSTOM;
4272 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4273 iwe.u.data.length = strlen(buf);
4274 current_ev = iwe_stream_add_point(info, current_ev,
4277 memset(&iwe, 0, sizeof(iwe));
4278 iwe.cmd = IWEVCUSTOM;
4279 sprintf(buf, " Last beacon: %dms ago",
4280 jiffies_to_msecs(jiffies - bss->last_update));
4281 iwe.u.data.length = strlen(buf);
4282 current_ev = iwe_stream_add_point(info, current_ev,
4283 end_buf, &iwe, buf);
4288 if (bss_mesh_cfg(bss)) {
4290 u8 *cfg = bss_mesh_cfg(bss);
4291 buf = kmalloc(50, GFP_ATOMIC);
4293 memset(&iwe, 0, sizeof(iwe));
4294 iwe.cmd = IWEVCUSTOM;
4295 sprintf(buf, "Mesh network (version %d)", cfg[0]);
4296 iwe.u.data.length = strlen(buf);
4297 current_ev = iwe_stream_add_point(info, current_ev,
4300 sprintf(buf, "Path Selection Protocol ID: "
4301 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4303 iwe.u.data.length = strlen(buf);
4304 current_ev = iwe_stream_add_point(info, current_ev,
4307 sprintf(buf, "Path Selection Metric ID: "
4308 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4310 iwe.u.data.length = strlen(buf);
4311 current_ev = iwe_stream_add_point(info, current_ev,
4314 sprintf(buf, "Congestion Control Mode ID: "
4315 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4317 iwe.u.data.length = strlen(buf);
4318 current_ev = iwe_stream_add_point(info, current_ev,
4321 sprintf(buf, "Channel Precedence: "
4322 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4324 iwe.u.data.length = strlen(buf);
4325 current_ev = iwe_stream_add_point(info, current_ev,
4336 int ieee80211_sta_scan_results(struct net_device *dev,
4337 struct iw_request_info *info,
4338 char *buf, size_t len)
4340 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4341 char *current_ev = buf;
4342 char *end_buf = buf + len;
4343 struct ieee80211_sta_bss *bss;
4345 spin_lock_bh(&local->sta_bss_lock);
4346 list_for_each_entry(bss, &local->sta_bss_list, list) {
4347 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4348 spin_unlock_bh(&local->sta_bss_lock);
4351 current_ev = ieee80211_sta_scan_result(dev, info, bss,
4352 current_ev, end_buf);
4354 spin_unlock_bh(&local->sta_bss_lock);
4355 return current_ev - buf;
4359 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
4361 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4362 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4364 kfree(ifsta->extra_ie);
4366 ifsta->extra_ie = NULL;
4367 ifsta->extra_ie_len = 0;
4370 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4371 if (!ifsta->extra_ie) {
4372 ifsta->extra_ie_len = 0;
4375 memcpy(ifsta->extra_ie, ie, len);
4376 ifsta->extra_ie_len = len;
4381 struct sta_info *ieee80211_ibss_add_sta(struct net_device *dev,
4382 struct sk_buff *skb, u8 *bssid,
4383 u8 *addr, u64 supp_rates)
4385 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4386 struct sta_info *sta;
4387 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4388 DECLARE_MAC_BUF(mac);
4389 int band = local->hw.conf.channel->band;
4391 /* TODO: Could consider removing the least recently used entry and
4392 * allow new one to be added. */
4393 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4394 if (net_ratelimit()) {
4395 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
4396 "entry %s\n", dev->name, print_mac(mac, addr));
4401 if (!ieee80211_bssid_match(bssid, sdata->u.sta.bssid))
4404 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
4405 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
4406 wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
4409 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4413 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
4416 sta->supp_rates[band] = supp_rates;
4418 sta->supp_rates[band] = sdata->u.sta.supp_rates_bits[band];
4420 rate_control_rate_init(sta, local);
4422 if (sta_info_insert(sta))
4429 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
4431 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4432 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4434 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
4437 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4438 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
4441 ieee80211_send_deauth(dev, ifsta, reason);
4442 ieee80211_set_disassoc(dev, ifsta, 1);
4447 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
4449 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4450 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4452 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
4455 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4458 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
4461 ieee80211_send_disassoc(dev, ifsta, reason);
4462 ieee80211_set_disassoc(dev, ifsta, 0);
4466 void ieee80211_notify_mac(struct ieee80211_hw *hw,
4467 enum ieee80211_notification_types notif_type)
4469 struct ieee80211_local *local = hw_to_local(hw);
4470 struct ieee80211_sub_if_data *sdata;
4472 switch (notif_type) {
4473 case IEEE80211_NOTIFY_RE_ASSOC:
4475 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4477 if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
4478 ieee80211_sta_req_auth(sdata->dev,
4487 EXPORT_SYMBOL(ieee80211_notify_mac);