2 * BSS client mode implementation
3 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
15 * order BSS list by RSSI(?) ("quality of AP")
16 * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
19 #include <linux/delay.h>
20 #include <linux/if_ether.h>
21 #include <linux/skbuff.h>
22 #include <linux/netdevice.h>
23 #include <linux/if_arp.h>
24 #include <linux/wireless.h>
25 #include <linux/random.h>
26 #include <linux/etherdevice.h>
27 #include <linux/rtnetlink.h>
28 #include <net/iw_handler.h>
29 #include <asm/types.h>
31 #include <net/mac80211.h>
32 #include "ieee80211_i.h"
37 #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
38 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
39 #define IEEE80211_AUTH_MAX_TRIES 3
40 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
41 #define IEEE80211_ASSOC_MAX_TRIES 3
42 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
43 #define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
44 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
45 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
46 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
47 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
48 #define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
50 #define IEEE80211_PROBE_DELAY (HZ / 33)
51 #define IEEE80211_CHANNEL_TIME (HZ / 33)
52 #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
53 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
54 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
55 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
56 #define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
58 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
61 #define ERP_INFO_USE_PROTECTION BIT(1)
63 /* mgmt header + 1 byte category code */
64 #define IEEE80211_MIN_ACTION_SIZE (24 + 1)
66 #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
67 #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
68 #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
69 #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
70 #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
72 /* next values represent the buffer size for A-MPDU frame.
73 * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
74 #define IEEE80211_MIN_AMPDU_BUF 0x8
75 #define IEEE80211_MAX_AMPDU_BUF 0x40
77 static void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
78 u8 *ssid, size_t ssid_len);
79 static struct ieee80211_sta_bss *
80 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
81 u8 *ssid, u8 ssid_len);
82 static void ieee80211_rx_bss_put(struct ieee80211_local *local,
83 struct ieee80211_sta_bss *bss);
84 static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
85 struct ieee80211_if_sta *ifsta);
86 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata);
87 static int ieee80211_sta_start_scan(struct ieee80211_sub_if_data *sdata,
88 u8 *ssid, size_t ssid_len);
89 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
90 struct ieee80211_if_sta *ifsta);
91 static void sta_rx_agg_session_timer_expired(unsigned long data);
94 static u8 * ieee80211_bss_get_ie(struct ieee80211_sta_bss *bss, u8 ie)
101 end = pos + bss->ies_len;
103 while (pos + 1 < end) {
104 if (pos + 2 + pos[1] > end)
115 static int ecw2cw(int ecw)
117 return (1 << ecw) - 1;
121 static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
122 struct ieee80211_sta_bss *bss,
125 struct ieee80211_local *local = sdata->local;
126 int i, have_higher_than_11mbit = 0;
129 /* cf. IEEE 802.11 9.2.12 */
130 for (i = 0; i < bss->supp_rates_len; i++)
131 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
132 have_higher_than_11mbit = 1;
134 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
135 have_higher_than_11mbit)
136 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
138 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
141 if (local->ops->conf_tx) {
142 struct ieee80211_tx_queue_params qparam;
144 memset(&qparam, 0, sizeof(qparam));
148 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
149 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
154 qparam.cw_max = 1023;
157 for (i = 0; i < local_to_hw(local)->queues; i++)
158 local->ops->conf_tx(local_to_hw(local), i, &qparam);
162 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
163 struct ieee80211_if_sta *ifsta,
164 u8 *wmm_param, size_t wmm_param_len)
166 struct ieee80211_tx_queue_params params;
171 if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
177 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
179 count = wmm_param[6] & 0x0f;
180 if (count == ifsta->wmm_last_param_set)
182 ifsta->wmm_last_param_set = count;
185 left = wmm_param_len - 8;
187 memset(¶ms, 0, sizeof(params));
189 if (!local->ops->conf_tx)
193 for (; left >= 4; left -= 4, pos += 4) {
194 int aci = (pos[0] >> 5) & 0x03;
195 int acm = (pos[0] >> 4) & 0x01;
202 local->wmm_acm |= BIT(0) | BIT(3);
207 local->wmm_acm |= BIT(4) | BIT(5);
212 local->wmm_acm |= BIT(6) | BIT(7);
218 local->wmm_acm |= BIT(1) | BIT(2);
222 params.aifs = pos[0] & 0x0f;
223 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
224 params.cw_min = ecw2cw(pos[1] & 0x0f);
225 params.txop = get_unaligned_le16(pos + 2);
226 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
227 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
228 "cWmin=%d cWmax=%d txop=%d\n",
229 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
230 params.cw_max, params.txop);
232 /* TODO: handle ACM (block TX, fallback to next lowest allowed
234 if (local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) {
235 printk(KERN_DEBUG "%s: failed to set TX queue "
236 "parameters for queue %d\n", local->mdev->name, queue);
241 static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
243 bool use_short_preamble)
245 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
246 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
247 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
248 DECLARE_MAC_BUF(mac);
252 if (use_protection != bss_conf->use_cts_prot) {
253 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
254 if (net_ratelimit()) {
255 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
258 use_protection ? "enabled" : "disabled",
259 print_mac(mac, ifsta->bssid));
262 bss_conf->use_cts_prot = use_protection;
263 changed |= BSS_CHANGED_ERP_CTS_PROT;
266 if (use_short_preamble != bss_conf->use_short_preamble) {
267 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
268 if (net_ratelimit()) {
269 printk(KERN_DEBUG "%s: switched to %s barker preamble"
272 use_short_preamble ? "short" : "long",
273 print_mac(mac, ifsta->bssid));
276 bss_conf->use_short_preamble = use_short_preamble;
277 changed |= BSS_CHANGED_ERP_PREAMBLE;
283 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
286 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
287 bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
289 return ieee80211_handle_protect_preamb(sdata,
290 use_protection, use_short_preamble);
293 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
294 struct ieee80211_sta_bss *bss)
298 if (bss->has_erp_value)
299 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
301 u16 capab = bss->capability;
302 changed |= ieee80211_handle_protect_preamb(sdata, false,
303 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
309 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
310 struct ieee80211_ht_info *ht_info)
316 memset(ht_info, 0, sizeof(*ht_info));
319 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
321 ht_info->ht_supported = 1;
322 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
323 ht_info->ampdu_factor =
324 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
325 ht_info->ampdu_density =
326 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
327 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
329 ht_info->ht_supported = 0;
334 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
335 struct ieee80211_ht_addt_info *ht_add_info_ie,
336 struct ieee80211_ht_bss_info *bss_info)
338 if (bss_info == NULL)
341 memset(bss_info, 0, sizeof(*bss_info));
343 if (ht_add_info_ie) {
345 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
347 bss_info->primary_channel = ht_add_info_ie->control_chan;
348 bss_info->bss_cap = ht_add_info_ie->ht_param;
349 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
355 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata,
356 struct ieee80211_if_sta *ifsta)
358 union iwreq_data wrqu;
360 if (ifsta->assocreq_ies) {
361 memset(&wrqu, 0, sizeof(wrqu));
362 wrqu.data.length = ifsta->assocreq_ies_len;
363 wireless_send_event(sdata->dev, IWEVASSOCREQIE, &wrqu,
364 ifsta->assocreq_ies);
366 if (ifsta->assocresp_ies) {
367 memset(&wrqu, 0, sizeof(wrqu));
368 wrqu.data.length = ifsta->assocresp_ies_len;
369 wireless_send_event(sdata->dev, IWEVASSOCRESPIE, &wrqu,
370 ifsta->assocresp_ies);
375 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
376 struct ieee80211_if_sta *ifsta,
379 struct ieee80211_local *local = sdata->local;
380 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
381 union iwreq_data wrqu;
382 u32 changed = BSS_CHANGED_ASSOC;
385 struct ieee80211_sta_bss *bss;
387 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
389 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
392 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
393 conf->channel->center_freq,
394 ifsta->ssid, ifsta->ssid_len);
396 /* set timing information */
397 sdata->bss_conf.beacon_int = bss->beacon_int;
398 sdata->bss_conf.timestamp = bss->timestamp;
399 sdata->bss_conf.dtim_period = bss->dtim_period;
401 changed |= ieee80211_handle_bss_capability(sdata, bss);
403 ieee80211_rx_bss_put(local, bss);
406 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
407 changed |= BSS_CHANGED_HT;
408 sdata->bss_conf.assoc_ht = 1;
409 sdata->bss_conf.ht_conf = &conf->ht_conf;
410 sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
413 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
414 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
415 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
416 ieee80211_sta_send_associnfo(sdata, ifsta);
418 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
419 changed |= ieee80211_reset_erp_info(sdata);
421 sdata->bss_conf.assoc_ht = 0;
422 sdata->bss_conf.ht_conf = NULL;
423 sdata->bss_conf.ht_bss_conf = NULL;
425 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
427 ifsta->last_probe = jiffies;
428 ieee80211_led_assoc(local, assoc);
430 sdata->bss_conf.assoc = assoc;
431 ieee80211_bss_info_change_notify(sdata, changed);
434 netif_carrier_on(sdata->dev);
436 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
437 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
440 void ieee80211_sta_tx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
443 skb->dev = sdata->local->mdev;
444 skb_set_mac_header(skb, 0);
445 skb_set_network_header(skb, 0);
446 skb_set_transport_header(skb, 0);
448 skb->iif = sdata->dev->ifindex;
449 skb->do_not_encrypt = !encrypt;
455 static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
456 struct ieee80211_if_sta *ifsta,
457 int transaction, u8 *extra, size_t extra_len,
460 struct ieee80211_local *local = sdata->local;
462 struct ieee80211_mgmt *mgmt;
464 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
465 sizeof(*mgmt) + 6 + extra_len);
467 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
468 "frame\n", sdata->dev->name);
471 skb_reserve(skb, local->hw.extra_tx_headroom);
473 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
474 memset(mgmt, 0, 24 + 6);
475 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
476 IEEE80211_STYPE_AUTH);
478 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
479 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
480 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
481 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
482 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
483 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
484 ifsta->auth_transaction = transaction + 1;
485 mgmt->u.auth.status_code = cpu_to_le16(0);
487 memcpy(skb_put(skb, extra_len), extra, extra_len);
489 ieee80211_sta_tx(sdata, skb, encrypt);
492 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
493 struct ieee80211_if_sta *ifsta)
495 DECLARE_MAC_BUF(mac);
497 ifsta->direct_probe_tries++;
498 if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
499 printk(KERN_DEBUG "%s: direct probe to AP %s timed out\n",
500 sdata->dev->name, print_mac(mac, ifsta->bssid));
501 ifsta->state = IEEE80211_STA_MLME_DISABLED;
505 printk(KERN_DEBUG "%s: direct probe to AP %s try %d\n",
506 sdata->dev->name, print_mac(mac, ifsta->bssid),
507 ifsta->direct_probe_tries);
509 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
511 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request);
513 /* Direct probe is sent to broadcast address as some APs
514 * will not answer to direct packet in unassociated state.
516 ieee80211_send_probe_req(sdata, NULL,
517 ifsta->ssid, ifsta->ssid_len);
519 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
523 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
524 struct ieee80211_if_sta *ifsta)
526 DECLARE_MAC_BUF(mac);
529 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
530 printk(KERN_DEBUG "%s: authentication with AP %s"
532 sdata->dev->name, print_mac(mac, ifsta->bssid));
533 ifsta->state = IEEE80211_STA_MLME_DISABLED;
537 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
538 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
539 sdata->dev->name, print_mac(mac, ifsta->bssid));
541 ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
543 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
546 static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss,
547 struct ieee80211_supported_band *sband,
553 for (i = 0; i < bss->supp_rates_len; i++) {
554 int rate = (bss->supp_rates[i] & 0x7F) * 5;
556 for (j = 0; j < sband->n_bitrates; j++)
557 if (sband->bitrates[j].bitrate == rate) {
567 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
568 struct ieee80211_if_sta *ifsta)
570 struct ieee80211_local *local = sdata->local;
572 struct ieee80211_mgmt *mgmt;
573 u8 *pos, *ies, *ht_add_ie;
574 int i, len, count, rates_len, supp_rates_len;
576 struct ieee80211_sta_bss *bss;
578 struct ieee80211_supported_band *sband;
581 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
582 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
585 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
586 "frame\n", sdata->dev->name);
589 skb_reserve(skb, local->hw.extra_tx_headroom);
591 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
593 capab = ifsta->capab;
595 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
596 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
597 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
598 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
599 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
602 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
603 local->hw.conf.channel->center_freq,
604 ifsta->ssid, ifsta->ssid_len);
606 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
607 capab |= WLAN_CAPABILITY_PRIVACY;
611 /* get all rates supported by the device and the AP as
612 * some APs don't like getting a superset of their rates
613 * in the association request (e.g. D-Link DAP 1353 in
615 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
617 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
618 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
619 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
621 ieee80211_rx_bss_put(local, bss);
624 rates_len = sband->n_bitrates;
627 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
629 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
630 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
631 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
633 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
635 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
636 IEEE80211_STYPE_REASSOC_REQ);
637 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
638 mgmt->u.reassoc_req.listen_interval =
639 cpu_to_le16(local->hw.conf.listen_interval);
640 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
644 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
645 IEEE80211_STYPE_ASSOC_REQ);
646 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
647 mgmt->u.reassoc_req.listen_interval =
648 cpu_to_le16(local->hw.conf.listen_interval);
652 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
653 *pos++ = WLAN_EID_SSID;
654 *pos++ = ifsta->ssid_len;
655 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
657 /* add all rates which were marked to be used above */
658 supp_rates_len = rates_len;
659 if (supp_rates_len > 8)
662 len = sband->n_bitrates;
663 pos = skb_put(skb, supp_rates_len + 2);
664 *pos++ = WLAN_EID_SUPP_RATES;
665 *pos++ = supp_rates_len;
668 for (i = 0; i < sband->n_bitrates; i++) {
669 if (BIT(i) & rates) {
670 int rate = sband->bitrates[i].bitrate;
671 *pos++ = (u8) (rate / 5);
677 if (rates_len > count) {
678 pos = skb_put(skb, rates_len - count + 2);
679 *pos++ = WLAN_EID_EXT_SUPP_RATES;
680 *pos++ = rates_len - count;
682 for (i++; i < sband->n_bitrates; i++) {
683 if (BIT(i) & rates) {
684 int rate = sband->bitrates[i].bitrate;
685 *pos++ = (u8) (rate / 5);
690 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
691 /* 1. power capabilities */
692 pos = skb_put(skb, 4);
693 *pos++ = WLAN_EID_PWR_CAPABILITY;
695 *pos++ = 0; /* min tx power */
696 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
698 /* 2. supported channels */
699 /* TODO: get this in reg domain format */
700 pos = skb_put(skb, 2 * sband->n_channels + 2);
701 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
702 *pos++ = 2 * sband->n_channels;
703 for (i = 0; i < sband->n_channels; i++) {
704 *pos++ = ieee80211_frequency_to_channel(
705 sband->channels[i].center_freq);
706 *pos++ = 1; /* one channel in the subband*/
710 if (ifsta->extra_ie) {
711 pos = skb_put(skb, ifsta->extra_ie_len);
712 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
715 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
716 pos = skb_put(skb, 9);
717 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
718 *pos++ = 7; /* len */
719 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
722 *pos++ = 2; /* WME */
723 *pos++ = 0; /* WME info */
724 *pos++ = 1; /* WME ver */
728 /* wmm support is a must to HT */
729 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
730 sband->ht_info.ht_supported &&
731 (ht_add_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_EXTRA_INFO))) {
732 struct ieee80211_ht_addt_info *ht_add_info =
733 (struct ieee80211_ht_addt_info *)ht_add_ie;
734 u16 cap = sband->ht_info.cap;
736 u32 flags = local->hw.conf.channel->flags;
738 switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) {
739 case IEEE80211_HT_IE_CHA_SEC_ABOVE:
740 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
741 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
742 cap &= ~IEEE80211_HT_CAP_SGI_40;
745 case IEEE80211_HT_IE_CHA_SEC_BELOW:
746 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
747 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
748 cap &= ~IEEE80211_HT_CAP_SGI_40;
753 tmp = cpu_to_le16(cap);
754 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
755 *pos++ = WLAN_EID_HT_CAPABILITY;
756 *pos++ = sizeof(struct ieee80211_ht_cap);
757 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
758 memcpy(pos, &tmp, sizeof(u16));
760 /* TODO: needs a define here for << 2 */
761 *pos++ = sband->ht_info.ampdu_factor |
762 (sband->ht_info.ampdu_density << 2);
763 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
766 kfree(ifsta->assocreq_ies);
767 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
768 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
769 if (ifsta->assocreq_ies)
770 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
772 ieee80211_sta_tx(sdata, skb, 0);
776 static void ieee80211_send_deauth(struct ieee80211_sub_if_data *sdata,
777 struct ieee80211_if_sta *ifsta, u16 reason)
779 struct ieee80211_local *local = sdata->local;
781 struct ieee80211_mgmt *mgmt;
783 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
785 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
786 "frame\n", sdata->dev->name);
789 skb_reserve(skb, local->hw.extra_tx_headroom);
791 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
793 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
794 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
795 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
796 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
797 IEEE80211_STYPE_DEAUTH);
799 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
801 ieee80211_sta_tx(sdata, skb, 0);
805 static void ieee80211_send_disassoc(struct ieee80211_sub_if_data *sdata,
806 struct ieee80211_if_sta *ifsta, u16 reason)
808 struct ieee80211_local *local = sdata->local;
810 struct ieee80211_mgmt *mgmt;
812 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
814 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
815 "frame\n", sdata->dev->name);
818 skb_reserve(skb, local->hw.extra_tx_headroom);
820 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
822 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
823 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
824 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
825 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
826 IEEE80211_STYPE_DISASSOC);
828 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
830 ieee80211_sta_tx(sdata, skb, 0);
833 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
834 struct ieee80211_if_sta *ifsta, bool deauth,
835 bool self_disconnected, u16 reason)
837 struct ieee80211_local *local = sdata->local;
838 struct sta_info *sta;
842 sta = sta_info_get(local, ifsta->bssid);
849 ifsta->direct_probe_tries = 0;
850 ifsta->auth_tries = 0;
852 ifsta->assoc_scan_tries = 0;
853 ifsta->assoc_tries = 0;
855 netif_carrier_off(sdata->dev);
857 ieee80211_sta_tear_down_BA_sessions(sdata, sta->addr);
859 if (self_disconnected) {
861 ieee80211_send_deauth(sdata, ifsta, reason);
863 ieee80211_send_disassoc(sdata, ifsta, reason);
866 ieee80211_set_associated(sdata, ifsta, 0);
868 if (self_disconnected)
869 ifsta->state = IEEE80211_STA_MLME_DISABLED;
871 sta_info_unlink(&sta);
875 sta_info_destroy(sta);
878 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
879 struct ieee80211_if_sta *ifsta)
881 struct ieee80211_local *local = sdata->local;
882 struct ieee80211_sta_bss *bss;
887 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
890 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
891 local->hw.conf.channel->center_freq,
892 ifsta->ssid, ifsta->ssid_len);
896 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
897 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
898 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
900 ieee80211_rx_bss_put(local, bss);
902 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
909 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
910 struct ieee80211_if_sta *ifsta)
912 DECLARE_MAC_BUF(mac);
914 ifsta->assoc_tries++;
915 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
916 printk(KERN_DEBUG "%s: association with AP %s"
918 sdata->dev->name, print_mac(mac, ifsta->bssid));
919 ifsta->state = IEEE80211_STA_MLME_DISABLED;
923 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
924 printk(KERN_DEBUG "%s: associate with AP %s\n",
925 sdata->dev->name, print_mac(mac, ifsta->bssid));
926 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
927 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
928 "mixed-cell disabled - abort association\n", sdata->dev->name);
929 ifsta->state = IEEE80211_STA_MLME_DISABLED;
933 ieee80211_send_assoc(sdata, ifsta);
935 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
939 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
940 struct ieee80211_if_sta *ifsta)
942 struct ieee80211_local *local = sdata->local;
943 struct sta_info *sta;
945 DECLARE_MAC_BUF(mac);
947 /* TODO: start monitoring current AP signal quality and number of
948 * missed beacons. Scan other channels every now and then and search
950 /* TODO: remove expired BSSes */
952 ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
956 sta = sta_info_get(local, ifsta->bssid);
958 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
959 sdata->dev->name, print_mac(mac, ifsta->bssid));
963 if (time_after(jiffies,
964 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
965 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
966 printk(KERN_DEBUG "%s: No ProbeResp from "
967 "current AP %s - assume out of "
969 sdata->dev->name, print_mac(mac, ifsta->bssid));
972 ieee80211_send_probe_req(sdata, ifsta->bssid,
974 local->scan_ssid_len);
975 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
977 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
978 if (time_after(jiffies, ifsta->last_probe +
979 IEEE80211_PROBE_INTERVAL)) {
980 ifsta->last_probe = jiffies;
981 ieee80211_send_probe_req(sdata, ifsta->bssid,
991 ieee80211_set_disassoc(sdata, ifsta, true, true,
992 WLAN_REASON_PREV_AUTH_NOT_VALID);
994 mod_timer(&ifsta->timer, jiffies +
995 IEEE80211_MONITORING_INTERVAL);
999 static void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1000 u8 *ssid, size_t ssid_len)
1002 struct ieee80211_local *local = sdata->local;
1003 struct ieee80211_supported_band *sband;
1004 struct sk_buff *skb;
1005 struct ieee80211_mgmt *mgmt;
1006 u8 *pos, *supp_rates, *esupp_rates = NULL;
1009 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
1011 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1012 "request\n", sdata->dev->name);
1015 skb_reserve(skb, local->hw.extra_tx_headroom);
1017 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1018 memset(mgmt, 0, 24);
1019 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1020 IEEE80211_STYPE_PROBE_REQ);
1021 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1023 memcpy(mgmt->da, dst, ETH_ALEN);
1024 memcpy(mgmt->bssid, dst, ETH_ALEN);
1026 memset(mgmt->da, 0xff, ETH_ALEN);
1027 memset(mgmt->bssid, 0xff, ETH_ALEN);
1029 pos = skb_put(skb, 2 + ssid_len);
1030 *pos++ = WLAN_EID_SSID;
1032 memcpy(pos, ssid, ssid_len);
1034 supp_rates = skb_put(skb, 2);
1035 supp_rates[0] = WLAN_EID_SUPP_RATES;
1037 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1039 for (i = 0; i < sband->n_bitrates; i++) {
1040 struct ieee80211_rate *rate = &sband->bitrates[i];
1042 pos = skb_put(skb, 1);
1044 } else if (supp_rates[1] == 8) {
1045 esupp_rates = skb_put(skb, 3);
1046 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1048 pos = &esupp_rates[2];
1050 pos = skb_put(skb, 1);
1053 *pos = rate->bitrate / 5;
1056 ieee80211_sta_tx(sdata, skb, 0);
1060 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
1062 if (!sdata || !sdata->default_key ||
1063 sdata->default_key->conf.alg != ALG_WEP)
1069 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
1070 struct ieee80211_if_sta *ifsta)
1072 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1073 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1074 ieee80211_associate(sdata, ifsta);
1078 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1079 struct ieee80211_if_sta *ifsta,
1080 struct ieee80211_mgmt *mgmt,
1084 struct ieee802_11_elems elems;
1086 pos = mgmt->u.auth.variable;
1087 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1088 if (!elems.challenge)
1090 ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
1091 elems.challenge_len + 2, 1);
1094 static void ieee80211_send_addba_resp(struct ieee80211_sub_if_data *sdata, u8 *da, u16 tid,
1095 u8 dialog_token, u16 status, u16 policy,
1096 u16 buf_size, u16 timeout)
1098 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1099 struct ieee80211_local *local = sdata->local;
1100 struct sk_buff *skb;
1101 struct ieee80211_mgmt *mgmt;
1104 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1107 printk(KERN_DEBUG "%s: failed to allocate buffer "
1108 "for addba resp frame\n", sdata->dev->name);
1112 skb_reserve(skb, local->hw.extra_tx_headroom);
1113 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1114 memset(mgmt, 0, 24);
1115 memcpy(mgmt->da, da, ETH_ALEN);
1116 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1117 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1118 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
1120 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1121 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1122 IEEE80211_STYPE_ACTION);
1124 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1125 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1126 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1127 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1129 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1130 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1131 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1133 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1134 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1135 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1137 ieee80211_sta_tx(sdata, skb, 0);
1142 void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata, const u8 *da,
1143 u16 tid, u8 dialog_token, u16 start_seq_num,
1144 u16 agg_size, u16 timeout)
1146 struct ieee80211_local *local = sdata->local;
1147 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1148 struct sk_buff *skb;
1149 struct ieee80211_mgmt *mgmt;
1152 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1155 printk(KERN_ERR "%s: failed to allocate buffer "
1156 "for addba request frame\n", sdata->dev->name);
1159 skb_reserve(skb, local->hw.extra_tx_headroom);
1160 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1161 memset(mgmt, 0, 24);
1162 memcpy(mgmt->da, da, ETH_ALEN);
1163 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1164 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1165 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
1167 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1169 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1170 IEEE80211_STYPE_ACTION);
1172 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1174 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1175 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1177 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1178 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
1179 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1180 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
1182 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1184 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1185 mgmt->u.action.u.addba_req.start_seq_num =
1186 cpu_to_le16(start_seq_num << 4);
1188 ieee80211_sta_tx(sdata, skb, 0);
1191 static void ieee80211_sta_process_addba_request(struct ieee80211_local *local,
1192 struct ieee80211_mgmt *mgmt,
1195 struct ieee80211_hw *hw = &local->hw;
1196 struct ieee80211_conf *conf = &hw->conf;
1197 struct sta_info *sta;
1198 struct tid_ampdu_rx *tid_agg_rx;
1199 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1201 int ret = -EOPNOTSUPP;
1202 DECLARE_MAC_BUF(mac);
1206 sta = sta_info_get(local, mgmt->sa);
1212 /* extract session parameters from addba request frame */
1213 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1214 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1216 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1218 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1219 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1220 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1221 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1223 status = WLAN_STATUS_REQUEST_DECLINED;
1225 /* sanity check for incoming parameters:
1226 * check if configuration can support the BA policy
1227 * and if buffer size does not exceeds max value */
1228 if (((ba_policy != 1)
1229 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1230 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1231 status = WLAN_STATUS_INVALID_QOS_PARAM;
1232 #ifdef CONFIG_MAC80211_HT_DEBUG
1233 if (net_ratelimit())
1234 printk(KERN_DEBUG "AddBA Req with bad params from "
1235 "%s on tid %u. policy %d, buffer size %d\n",
1236 print_mac(mac, mgmt->sa), tid, ba_policy,
1238 #endif /* CONFIG_MAC80211_HT_DEBUG */
1241 /* determine default buffer size */
1242 if (buf_size == 0) {
1243 struct ieee80211_supported_band *sband;
1245 sband = local->hw.wiphy->bands[conf->channel->band];
1246 buf_size = IEEE80211_MIN_AMPDU_BUF;
1247 buf_size = buf_size << sband->ht_info.ampdu_factor;
1251 /* examine state machine */
1252 spin_lock_bh(&sta->lock);
1254 if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
1255 #ifdef CONFIG_MAC80211_HT_DEBUG
1256 if (net_ratelimit())
1257 printk(KERN_DEBUG "unexpected AddBA Req from "
1259 print_mac(mac, mgmt->sa), tid);
1260 #endif /* CONFIG_MAC80211_HT_DEBUG */
1264 /* prepare A-MPDU MLME for Rx aggregation */
1265 sta->ampdu_mlme.tid_rx[tid] =
1266 kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1267 if (!sta->ampdu_mlme.tid_rx[tid]) {
1268 #ifdef CONFIG_MAC80211_HT_DEBUG
1269 if (net_ratelimit())
1270 printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1276 sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1277 sta_rx_agg_session_timer_expired;
1278 sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1279 (unsigned long)&sta->timer_to_tid[tid];
1280 init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1282 tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1284 /* prepare reordering buffer */
1285 tid_agg_rx->reorder_buf =
1286 kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC);
1287 if (!tid_agg_rx->reorder_buf) {
1288 #ifdef CONFIG_MAC80211_HT_DEBUG
1289 if (net_ratelimit())
1290 printk(KERN_ERR "can not allocate reordering buffer "
1291 "to tid %d\n", tid);
1293 kfree(sta->ampdu_mlme.tid_rx[tid]);
1296 memset(tid_agg_rx->reorder_buf, 0,
1297 buf_size * sizeof(struct sk_buff *));
1299 if (local->ops->ampdu_action)
1300 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1301 sta->addr, tid, &start_seq_num);
1302 #ifdef CONFIG_MAC80211_HT_DEBUG
1303 printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
1304 #endif /* CONFIG_MAC80211_HT_DEBUG */
1307 kfree(tid_agg_rx->reorder_buf);
1309 sta->ampdu_mlme.tid_rx[tid] = NULL;
1313 /* change state and send addba resp */
1314 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
1315 tid_agg_rx->dialog_token = dialog_token;
1316 tid_agg_rx->ssn = start_seq_num;
1317 tid_agg_rx->head_seq_num = start_seq_num;
1318 tid_agg_rx->buf_size = buf_size;
1319 tid_agg_rx->timeout = timeout;
1320 tid_agg_rx->stored_mpdu_num = 0;
1321 status = WLAN_STATUS_SUCCESS;
1323 spin_unlock_bh(&sta->lock);
1326 ieee80211_send_addba_resp(sta->sdata, sta->addr, tid,
1327 dialog_token, status, 1, buf_size, timeout);
1331 static void ieee80211_sta_process_addba_resp(struct ieee80211_local *local,
1332 struct ieee80211_mgmt *mgmt,
1335 struct ieee80211_hw *hw = &local->hw;
1336 struct sta_info *sta;
1343 sta = sta_info_get(local, mgmt->sa);
1349 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1350 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1352 state = &sta->ampdu_mlme.tid_state_tx[tid];
1354 spin_lock_bh(&sta->lock);
1356 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1357 spin_unlock_bh(&sta->lock);
1358 goto addba_resp_exit;
1361 if (mgmt->u.action.u.addba_resp.dialog_token !=
1362 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
1363 spin_unlock_bh(&sta->lock);
1364 #ifdef CONFIG_MAC80211_HT_DEBUG
1365 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1366 #endif /* CONFIG_MAC80211_HT_DEBUG */
1367 goto addba_resp_exit;
1370 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
1371 #ifdef CONFIG_MAC80211_HT_DEBUG
1372 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1373 #endif /* CONFIG_MAC80211_HT_DEBUG */
1374 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1375 == WLAN_STATUS_SUCCESS) {
1376 *state |= HT_ADDBA_RECEIVED_MSK;
1377 sta->ampdu_mlme.addba_req_num[tid] = 0;
1379 if (*state == HT_AGG_STATE_OPERATIONAL)
1380 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1382 spin_unlock_bh(&sta->lock);
1384 sta->ampdu_mlme.addba_req_num[tid]++;
1385 /* this will allow the state check in stop_BA_session */
1386 *state = HT_AGG_STATE_OPERATIONAL;
1387 spin_unlock_bh(&sta->lock);
1388 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1389 WLAN_BACK_INITIATOR);
1396 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata, const u8 *da, u16 tid,
1397 u16 initiator, u16 reason_code)
1399 struct ieee80211_local *local = sdata->local;
1400 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1401 struct sk_buff *skb;
1402 struct ieee80211_mgmt *mgmt;
1405 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1408 printk(KERN_ERR "%s: failed to allocate buffer "
1409 "for delba frame\n", sdata->dev->name);
1413 skb_reserve(skb, local->hw.extra_tx_headroom);
1414 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1415 memset(mgmt, 0, 24);
1416 memcpy(mgmt->da, da, ETH_ALEN);
1417 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1418 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1419 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
1421 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1422 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1423 IEEE80211_STYPE_ACTION);
1425 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1427 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1428 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1429 params = (u16)(initiator << 11); /* bit 11 initiator */
1430 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1432 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1433 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1435 ieee80211_sta_tx(sdata, skb, 0);
1438 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn)
1440 struct ieee80211_local *local = sdata->local;
1441 struct sk_buff *skb;
1442 struct ieee80211_bar *bar;
1443 u16 bar_control = 0;
1445 skb = dev_alloc_skb(sizeof(*bar) + local->hw.extra_tx_headroom);
1447 printk(KERN_ERR "%s: failed to allocate buffer for "
1448 "bar frame\n", sdata->dev->name);
1451 skb_reserve(skb, local->hw.extra_tx_headroom);
1452 bar = (struct ieee80211_bar *)skb_put(skb, sizeof(*bar));
1453 memset(bar, 0, sizeof(*bar));
1454 bar->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
1455 IEEE80211_STYPE_BACK_REQ);
1456 memcpy(bar->ra, ra, ETH_ALEN);
1457 memcpy(bar->ta, sdata->dev->dev_addr, ETH_ALEN);
1458 bar_control |= (u16)IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL;
1459 bar_control |= (u16)IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA;
1460 bar_control |= (u16)(tid << 12);
1461 bar->control = cpu_to_le16(bar_control);
1462 bar->start_seq_num = cpu_to_le16(ssn);
1464 ieee80211_sta_tx(sdata, skb, 0);
1467 void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid,
1468 u16 initiator, u16 reason)
1470 struct ieee80211_local *local = sdata->local;
1471 struct ieee80211_hw *hw = &local->hw;
1472 struct sta_info *sta;
1474 DECLARE_MAC_BUF(mac);
1478 sta = sta_info_get(local, ra);
1484 /* check if TID is in operational state */
1485 spin_lock_bh(&sta->lock);
1486 if (sta->ampdu_mlme.tid_state_rx[tid]
1487 != HT_AGG_STATE_OPERATIONAL) {
1488 spin_unlock_bh(&sta->lock);
1492 sta->ampdu_mlme.tid_state_rx[tid] =
1493 HT_AGG_STATE_REQ_STOP_BA_MSK |
1494 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1495 spin_unlock_bh(&sta->lock);
1497 /* stop HW Rx aggregation. ampdu_action existence
1498 * already verified in session init so we add the BUG_ON */
1499 BUG_ON(!local->ops->ampdu_action);
1501 #ifdef CONFIG_MAC80211_HT_DEBUG
1502 printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n",
1503 print_mac(mac, ra), tid);
1504 #endif /* CONFIG_MAC80211_HT_DEBUG */
1506 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1509 printk(KERN_DEBUG "HW problem - can not stop rx "
1510 "aggregation for tid %d\n", tid);
1512 /* shutdown timer has not expired */
1513 if (initiator != WLAN_BACK_TIMER)
1514 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1516 /* check if this is a self generated aggregation halt */
1517 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1518 ieee80211_send_delba(sdata, ra, tid, 0, reason);
1520 /* free the reordering buffer */
1521 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1522 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
1523 /* release the reordered frames */
1524 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1525 sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1526 sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
1529 /* free resources */
1530 kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1531 kfree(sta->ampdu_mlme.tid_rx[tid]);
1532 sta->ampdu_mlme.tid_rx[tid] = NULL;
1533 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
1539 static void ieee80211_sta_process_delba(struct ieee80211_sub_if_data *sdata,
1540 struct ieee80211_mgmt *mgmt, size_t len)
1542 struct ieee80211_local *local = sdata->local;
1543 struct sta_info *sta;
1546 DECLARE_MAC_BUF(mac);
1550 sta = sta_info_get(local, mgmt->sa);
1556 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1557 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1558 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1560 #ifdef CONFIG_MAC80211_HT_DEBUG
1561 if (net_ratelimit())
1562 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1563 print_mac(mac, mgmt->sa),
1564 initiator ? "initiator" : "recipient", tid,
1565 mgmt->u.action.u.delba.reason_code);
1566 #endif /* CONFIG_MAC80211_HT_DEBUG */
1568 if (initiator == WLAN_BACK_INITIATOR)
1569 ieee80211_sta_stop_rx_ba_session(sdata, sta->addr, tid,
1570 WLAN_BACK_INITIATOR, 0);
1571 else { /* WLAN_BACK_RECIPIENT */
1572 spin_lock_bh(&sta->lock);
1573 sta->ampdu_mlme.tid_state_tx[tid] =
1574 HT_AGG_STATE_OPERATIONAL;
1575 spin_unlock_bh(&sta->lock);
1576 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1577 WLAN_BACK_RECIPIENT);
1583 * After sending add Block Ack request we activated a timer until
1584 * add Block Ack response will arrive from the recipient.
1585 * If this timer expires sta_addba_resp_timer_expired will be executed.
1587 void sta_addba_resp_timer_expired(unsigned long data)
1589 /* not an elegant detour, but there is no choice as the timer passes
1590 * only one argument, and both sta_info and TID are needed, so init
1591 * flow in sta_info_create gives the TID as data, while the timer_to_id
1592 * array gives the sta through container_of */
1593 u16 tid = *(u8 *)data;
1594 struct sta_info *temp_sta = container_of((void *)data,
1595 struct sta_info, timer_to_tid[tid]);
1597 struct ieee80211_local *local = temp_sta->local;
1598 struct ieee80211_hw *hw = &local->hw;
1599 struct sta_info *sta;
1604 sta = sta_info_get(local, temp_sta->addr);
1610 state = &sta->ampdu_mlme.tid_state_tx[tid];
1611 /* check if the TID waits for addBA response */
1612 spin_lock_bh(&sta->lock);
1613 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1614 spin_unlock_bh(&sta->lock);
1615 *state = HT_AGG_STATE_IDLE;
1616 #ifdef CONFIG_MAC80211_HT_DEBUG
1617 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1618 "expecting addBA response there", tid);
1620 goto timer_expired_exit;
1623 #ifdef CONFIG_MAC80211_HT_DEBUG
1624 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1627 /* go through the state check in stop_BA_session */
1628 *state = HT_AGG_STATE_OPERATIONAL;
1629 spin_unlock_bh(&sta->lock);
1630 ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1631 WLAN_BACK_INITIATOR);
1638 * After accepting the AddBA Request we activated a timer,
1639 * resetting it after each frame that arrives from the originator.
1640 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1642 static void sta_rx_agg_session_timer_expired(unsigned long data)
1644 /* not an elegant detour, but there is no choice as the timer passes
1645 * only one argument, and various sta_info are needed here, so init
1646 * flow in sta_info_create gives the TID as data, while the timer_to_id
1647 * array gives the sta through container_of */
1648 u8 *ptid = (u8 *)data;
1649 u8 *timer_to_id = ptid - *ptid;
1650 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1653 #ifdef CONFIG_MAC80211_HT_DEBUG
1654 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1656 ieee80211_sta_stop_rx_ba_session(sta->sdata, sta->addr,
1657 (u16)*ptid, WLAN_BACK_TIMER,
1658 WLAN_REASON_QSTA_TIMEOUT);
1661 void ieee80211_sta_tear_down_BA_sessions(struct ieee80211_sub_if_data *sdata, u8 *addr)
1663 struct ieee80211_local *local = sdata->local;
1666 for (i = 0; i < STA_TID_NUM; i++) {
1667 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1668 WLAN_BACK_INITIATOR);
1669 ieee80211_sta_stop_rx_ba_session(sdata, addr, i,
1670 WLAN_BACK_RECIPIENT,
1671 WLAN_REASON_QSTA_LEAVE_QBSS);
1675 static void ieee80211_send_refuse_measurement_request(struct ieee80211_sub_if_data *sdata,
1676 struct ieee80211_msrment_ie *request_ie,
1677 const u8 *da, const u8 *bssid,
1680 struct ieee80211_local *local = sdata->local;
1681 struct sk_buff *skb;
1682 struct ieee80211_mgmt *msr_report;
1684 skb = dev_alloc_skb(sizeof(*msr_report) + local->hw.extra_tx_headroom +
1685 sizeof(struct ieee80211_msrment_ie));
1688 printk(KERN_ERR "%s: failed to allocate buffer for "
1689 "measurement report frame\n", sdata->dev->name);
1693 skb_reserve(skb, local->hw.extra_tx_headroom);
1694 msr_report = (struct ieee80211_mgmt *)skb_put(skb, 24);
1695 memset(msr_report, 0, 24);
1696 memcpy(msr_report->da, da, ETH_ALEN);
1697 memcpy(msr_report->sa, sdata->dev->dev_addr, ETH_ALEN);
1698 memcpy(msr_report->bssid, bssid, ETH_ALEN);
1699 msr_report->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1700 IEEE80211_STYPE_ACTION);
1702 skb_put(skb, 1 + sizeof(msr_report->u.action.u.measurement));
1703 msr_report->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
1704 msr_report->u.action.u.measurement.action_code =
1705 WLAN_ACTION_SPCT_MSR_RPRT;
1706 msr_report->u.action.u.measurement.dialog_token = dialog_token;
1708 msr_report->u.action.u.measurement.element_id = WLAN_EID_MEASURE_REPORT;
1709 msr_report->u.action.u.measurement.length =
1710 sizeof(struct ieee80211_msrment_ie);
1712 memset(&msr_report->u.action.u.measurement.msr_elem, 0,
1713 sizeof(struct ieee80211_msrment_ie));
1714 msr_report->u.action.u.measurement.msr_elem.token = request_ie->token;
1715 msr_report->u.action.u.measurement.msr_elem.mode |=
1716 IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED;
1717 msr_report->u.action.u.measurement.msr_elem.type = request_ie->type;
1719 ieee80211_sta_tx(sdata, skb, 0);
1722 static void ieee80211_sta_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1723 struct ieee80211_mgmt *mgmt,
1727 * Ignoring measurement request is spec violation.
1728 * Mandatory measurements must be reported optional
1729 * measurements might be refused or reported incapable
1730 * For now just refuse
1731 * TODO: Answer basic measurement as unmeasured
1733 ieee80211_send_refuse_measurement_request(sdata,
1734 &mgmt->u.action.u.measurement.msr_elem,
1735 mgmt->sa, mgmt->bssid,
1736 mgmt->u.action.u.measurement.dialog_token);
1740 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1741 struct ieee80211_if_sta *ifsta,
1742 struct ieee80211_mgmt *mgmt,
1745 u16 auth_alg, auth_transaction, status_code;
1746 DECLARE_MAC_BUF(mac);
1748 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
1749 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
1755 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1756 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1759 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1760 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1763 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1764 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1765 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1767 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1769 * IEEE 802.11 standard does not require authentication in IBSS
1770 * networks and most implementations do not seem to use it.
1771 * However, try to reply to authentication attempts if someone
1772 * has actually implemented this.
1774 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
1776 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
1779 if (auth_alg != ifsta->auth_alg ||
1780 auth_transaction != ifsta->auth_transaction)
1783 if (status_code != WLAN_STATUS_SUCCESS) {
1784 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1786 const int num_algs = ARRAY_SIZE(algs);
1788 algs[0] = algs[1] = algs[2] = 0xff;
1789 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1790 algs[0] = WLAN_AUTH_OPEN;
1791 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1792 algs[1] = WLAN_AUTH_SHARED_KEY;
1793 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1794 algs[2] = WLAN_AUTH_LEAP;
1795 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1797 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1801 for (i = 0; i < num_algs; i++) {
1803 if (pos >= num_algs)
1805 if (algs[pos] == ifsta->auth_alg ||
1808 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1809 !ieee80211_sta_wep_configured(sdata))
1811 ifsta->auth_alg = algs[pos];
1818 switch (ifsta->auth_alg) {
1819 case WLAN_AUTH_OPEN:
1820 case WLAN_AUTH_LEAP:
1821 ieee80211_auth_completed(sdata, ifsta);
1823 case WLAN_AUTH_SHARED_KEY:
1824 if (ifsta->auth_transaction == 4)
1825 ieee80211_auth_completed(sdata, ifsta);
1827 ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
1833 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1834 struct ieee80211_if_sta *ifsta,
1835 struct ieee80211_mgmt *mgmt,
1839 DECLARE_MAC_BUF(mac);
1844 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1847 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1849 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
1850 printk(KERN_DEBUG "%s: deauthenticated\n", sdata->dev->name);
1852 if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1853 ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
1854 ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1855 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1856 mod_timer(&ifsta->timer, jiffies +
1857 IEEE80211_RETRY_AUTH_INTERVAL);
1860 ieee80211_set_disassoc(sdata, ifsta, true, false, 0);
1861 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1865 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1866 struct ieee80211_if_sta *ifsta,
1867 struct ieee80211_mgmt *mgmt,
1871 DECLARE_MAC_BUF(mac);
1876 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1879 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1881 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1882 printk(KERN_DEBUG "%s: disassociated\n", sdata->dev->name);
1884 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1885 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
1886 mod_timer(&ifsta->timer, jiffies +
1887 IEEE80211_RETRY_AUTH_INTERVAL);
1890 ieee80211_set_disassoc(sdata, ifsta, false, false, 0);
1894 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1895 struct ieee80211_if_sta *ifsta,
1896 struct ieee80211_mgmt *mgmt,
1900 struct ieee80211_local *local = sdata->local;
1901 struct ieee80211_supported_band *sband;
1902 struct sta_info *sta;
1903 u64 rates, basic_rates;
1904 u16 capab_info, status_code, aid;
1905 struct ieee802_11_elems elems;
1906 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1909 DECLARE_MAC_BUF(mac);
1910 bool have_higher_than_11mbit = false;
1912 /* AssocResp and ReassocResp have identical structure, so process both
1913 * of them in this function. */
1915 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
1921 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1924 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1925 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1926 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1928 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1929 "status=%d aid=%d)\n",
1930 sdata->dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1931 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1933 if (status_code != WLAN_STATUS_SUCCESS) {
1934 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1935 sdata->dev->name, status_code);
1936 /* if this was a reassociation, ensure we try a "full"
1937 * association next time. This works around some broken APs
1938 * which do not correctly reject reassociation requests. */
1939 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1943 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1944 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1945 "set\n", sdata->dev->name, aid);
1946 aid &= ~(BIT(15) | BIT(14));
1948 pos = mgmt->u.assoc_resp.variable;
1949 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1951 if (!elems.supp_rates) {
1952 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1957 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1959 ifsta->ap_capab = capab_info;
1961 kfree(ifsta->assocresp_ies);
1962 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1963 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1964 if (ifsta->assocresp_ies)
1965 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1969 /* Add STA entry for the AP */
1970 sta = sta_info_get(local, ifsta->bssid);
1972 struct ieee80211_sta_bss *bss;
1975 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1977 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1978 " the AP\n", sdata->dev->name);
1982 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
1983 local->hw.conf.channel->center_freq,
1984 ifsta->ssid, ifsta->ssid_len);
1986 sta->last_signal = bss->signal;
1987 sta->last_qual = bss->qual;
1988 sta->last_noise = bss->noise;
1989 ieee80211_rx_bss_put(local, bss);
1992 err = sta_info_insert(sta);
1994 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1995 " the AP (error %d)\n", sdata->dev->name, err);
1999 /* update new sta with its last rx activity */
2000 sta->last_rx = jiffies;
2004 * FIXME: Do we really need to update the sta_info's information here?
2005 * We already know about the AP (we found it in our list) so it
2006 * should already be filled with the right info, no?
2007 * As is stands, all this is racy because typically we assume
2008 * the information that is filled in here (except flags) doesn't
2009 * change while a STA structure is alive. As such, it should move
2010 * to between the sta_info_alloc() and sta_info_insert() above.
2013 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
2014 WLAN_STA_AUTHORIZED);
2018 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2020 for (i = 0; i < elems.supp_rates_len; i++) {
2021 int rate = (elems.supp_rates[i] & 0x7f) * 5;
2024 have_higher_than_11mbit = true;
2026 for (j = 0; j < sband->n_bitrates; j++) {
2027 if (sband->bitrates[j].bitrate == rate)
2029 if (elems.supp_rates[i] & 0x80)
2030 basic_rates |= BIT(j);
2034 for (i = 0; i < elems.ext_supp_rates_len; i++) {
2035 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
2038 have_higher_than_11mbit = true;
2040 for (j = 0; j < sband->n_bitrates; j++) {
2041 if (sband->bitrates[j].bitrate == rate)
2043 if (elems.ext_supp_rates[i] & 0x80)
2044 basic_rates |= BIT(j);
2048 sta->supp_rates[local->hw.conf.channel->band] = rates;
2049 sdata->basic_rates = basic_rates;
2051 /* cf. IEEE 802.11 9.2.12 */
2052 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2053 have_higher_than_11mbit)
2054 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2056 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
2058 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
2059 (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2060 struct ieee80211_ht_bss_info bss_info;
2061 ieee80211_ht_cap_ie_to_ht_info(
2062 (struct ieee80211_ht_cap *)
2063 elems.ht_cap_elem, &sta->ht_info);
2064 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2065 (struct ieee80211_ht_addt_info *)
2066 elems.ht_info_elem, &bss_info);
2067 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
2070 rate_control_rate_init(sta, local);
2072 if (elems.wmm_param) {
2073 set_sta_flags(sta, WLAN_STA_WME);
2075 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
2076 elems.wmm_param_len);
2080 /* set AID and assoc capability,
2081 * ieee80211_set_associated() will tell the driver */
2082 bss_conf->aid = aid;
2083 bss_conf->assoc_capability = capab_info;
2084 ieee80211_set_associated(sdata, ifsta, 1);
2086 ieee80211_associated(sdata, ifsta);
2090 /* Caller must hold local->sta_bss_lock */
2091 static void __ieee80211_rx_bss_hash_add(struct ieee80211_local *local,
2092 struct ieee80211_sta_bss *bss)
2096 if (bss_mesh_cfg(bss))
2097 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2098 bss_mesh_id_len(bss));
2100 hash_idx = STA_HASH(bss->bssid);
2102 bss->hnext = local->sta_bss_hash[hash_idx];
2103 local->sta_bss_hash[hash_idx] = bss;
2107 /* Caller must hold local->sta_bss_lock */
2108 static void __ieee80211_rx_bss_hash_del(struct ieee80211_local *local,
2109 struct ieee80211_sta_bss *bss)
2111 struct ieee80211_sta_bss *b, *prev = NULL;
2112 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2116 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2119 prev->hnext = bss->hnext;
2128 static struct ieee80211_sta_bss *
2129 ieee80211_rx_bss_add(struct ieee80211_sub_if_data *sdata, u8 *bssid, int freq,
2130 u8 *ssid, u8 ssid_len)
2132 struct ieee80211_local *local = sdata->local;
2133 struct ieee80211_sta_bss *bss;
2135 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2138 atomic_inc(&bss->users);
2139 atomic_inc(&bss->users);
2140 memcpy(bss->bssid, bssid, ETH_ALEN);
2142 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2143 memcpy(bss->ssid, ssid, ssid_len);
2144 bss->ssid_len = ssid_len;
2147 spin_lock_bh(&local->sta_bss_lock);
2148 /* TODO: order by RSSI? */
2149 list_add_tail(&bss->list, &local->sta_bss_list);
2150 __ieee80211_rx_bss_hash_add(local, bss);
2151 spin_unlock_bh(&local->sta_bss_lock);
2155 static struct ieee80211_sta_bss *
2156 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
2157 u8 *ssid, u8 ssid_len)
2159 struct ieee80211_sta_bss *bss;
2161 spin_lock_bh(&local->sta_bss_lock);
2162 bss = local->sta_bss_hash[STA_HASH(bssid)];
2164 if (!bss_mesh_cfg(bss) &&
2165 !memcmp(bss->bssid, bssid, ETH_ALEN) &&
2166 bss->freq == freq &&
2167 bss->ssid_len == ssid_len &&
2168 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
2169 atomic_inc(&bss->users);
2174 spin_unlock_bh(&local->sta_bss_lock);
2178 #ifdef CONFIG_MAC80211_MESH
2179 static struct ieee80211_sta_bss *
2180 ieee80211_rx_mesh_bss_get(struct ieee80211_local *local, u8 *mesh_id, int mesh_id_len,
2181 u8 *mesh_cfg, int freq)
2183 struct ieee80211_sta_bss *bss;
2185 spin_lock_bh(&local->sta_bss_lock);
2186 bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2188 if (bss_mesh_cfg(bss) &&
2189 !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
2190 bss->freq == freq &&
2191 mesh_id_len == bss->mesh_id_len &&
2192 (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2194 atomic_inc(&bss->users);
2199 spin_unlock_bh(&local->sta_bss_lock);
2203 static struct ieee80211_sta_bss *
2204 ieee80211_rx_mesh_bss_add(struct ieee80211_local *local, u8 *mesh_id, int mesh_id_len,
2205 u8 *mesh_cfg, int mesh_config_len, int freq)
2207 struct ieee80211_sta_bss *bss;
2209 if (mesh_config_len != MESH_CFG_LEN)
2212 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2216 bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
2217 if (!bss->mesh_cfg) {
2222 if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2223 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2224 if (!bss->mesh_id) {
2225 kfree(bss->mesh_cfg);
2229 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2232 atomic_inc(&bss->users);
2233 atomic_inc(&bss->users);
2234 memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
2235 bss->mesh_id_len = mesh_id_len;
2237 spin_lock_bh(&local->sta_bss_lock);
2238 /* TODO: order by RSSI? */
2239 list_add_tail(&bss->list, &local->sta_bss_list);
2240 __ieee80211_rx_bss_hash_add(local, bss);
2241 spin_unlock_bh(&local->sta_bss_lock);
2246 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2249 kfree(bss_mesh_id(bss));
2250 kfree(bss_mesh_cfg(bss));
2255 static void ieee80211_rx_bss_put(struct ieee80211_local *local,
2256 struct ieee80211_sta_bss *bss)
2259 if (!atomic_dec_and_lock(&bss->users, &local->sta_bss_lock)) {
2264 __ieee80211_rx_bss_hash_del(local, bss);
2265 list_del(&bss->list);
2266 spin_unlock_bh(&local->sta_bss_lock);
2267 ieee80211_rx_bss_free(bss);
2271 void ieee80211_rx_bss_list_init(struct ieee80211_local *local)
2273 spin_lock_init(&local->sta_bss_lock);
2274 INIT_LIST_HEAD(&local->sta_bss_list);
2278 void ieee80211_rx_bss_list_deinit(struct ieee80211_local *local)
2280 struct ieee80211_sta_bss *bss, *tmp;
2282 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2283 ieee80211_rx_bss_put(local, bss);
2287 static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
2288 struct ieee80211_if_sta *ifsta,
2289 struct ieee80211_sta_bss *bss)
2291 struct ieee80211_local *local = sdata->local;
2292 int res, rates, i, j;
2293 struct sk_buff *skb;
2294 struct ieee80211_mgmt *mgmt;
2296 struct ieee80211_supported_band *sband;
2297 union iwreq_data wrqu;
2299 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2301 /* Remove possible STA entries from other IBSS networks. */
2302 sta_info_flush_delayed(sdata);
2304 if (local->ops->reset_tsf) {
2305 /* Reset own TSF to allow time synchronization work. */
2306 local->ops->reset_tsf(local_to_hw(local));
2308 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2309 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
2313 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2315 sdata->drop_unencrypted = bss->capability &
2316 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2318 res = ieee80211_set_freq(sdata, bss->freq);
2323 /* Build IBSS probe response */
2324 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2326 skb_reserve(skb, local->hw.extra_tx_headroom);
2328 mgmt = (struct ieee80211_mgmt *)
2329 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2330 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2331 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2332 IEEE80211_STYPE_PROBE_RESP);
2333 memset(mgmt->da, 0xff, ETH_ALEN);
2334 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
2335 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2336 mgmt->u.beacon.beacon_int =
2337 cpu_to_le16(local->hw.conf.beacon_int);
2338 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
2339 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2341 pos = skb_put(skb, 2 + ifsta->ssid_len);
2342 *pos++ = WLAN_EID_SSID;
2343 *pos++ = ifsta->ssid_len;
2344 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2346 rates = bss->supp_rates_len;
2349 pos = skb_put(skb, 2 + rates);
2350 *pos++ = WLAN_EID_SUPP_RATES;
2352 memcpy(pos, bss->supp_rates, rates);
2354 if (bss->band == IEEE80211_BAND_2GHZ) {
2355 pos = skb_put(skb, 2 + 1);
2356 *pos++ = WLAN_EID_DS_PARAMS;
2358 *pos++ = ieee80211_frequency_to_channel(bss->freq);
2361 pos = skb_put(skb, 2 + 2);
2362 *pos++ = WLAN_EID_IBSS_PARAMS;
2364 /* FIX: set ATIM window based on scan results */
2368 if (bss->supp_rates_len > 8) {
2369 rates = bss->supp_rates_len - 8;
2370 pos = skb_put(skb, 2 + rates);
2371 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2373 memcpy(pos, &bss->supp_rates[8], rates);
2376 ifsta->probe_resp = skb;
2378 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
2382 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2383 for (i = 0; i < bss->supp_rates_len; i++) {
2384 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2385 for (j = 0; j < sband->n_bitrates; j++)
2386 if (sband->bitrates[j].bitrate == bitrate)
2389 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2391 ieee80211_sta_def_wmm_params(sdata, bss, 1);
2393 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
2394 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2396 memset(&wrqu, 0, sizeof(wrqu));
2397 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
2398 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
2403 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2404 struct ieee802_11_elems *elems,
2405 enum ieee80211_band band)
2407 struct ieee80211_supported_band *sband;
2408 struct ieee80211_rate *bitrates;
2412 sband = local->hw.wiphy->bands[band];
2416 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2419 bitrates = sband->bitrates;
2420 num_rates = sband->n_bitrates;
2422 for (i = 0; i < elems->supp_rates_len +
2423 elems->ext_supp_rates_len; i++) {
2426 if (i < elems->supp_rates_len)
2427 rate = elems->supp_rates[i];
2428 else if (elems->ext_supp_rates)
2429 rate = elems->ext_supp_rates
2430 [i - elems->supp_rates_len];
2431 own_rate = 5 * (rate & 0x7f);
2432 for (j = 0; j < num_rates; j++)
2433 if (bitrates[j].bitrate == own_rate)
2434 supp_rates |= BIT(j);
2439 static u64 ieee80211_sta_get_mandatory_rates(struct ieee80211_local *local,
2440 enum ieee80211_band band)
2442 struct ieee80211_supported_band *sband;
2443 struct ieee80211_rate *bitrates;
2444 u64 mandatory_rates;
2445 enum ieee80211_rate_flags mandatory_flag;
2448 sband = local->hw.wiphy->bands[band];
2451 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2454 if (band == IEEE80211_BAND_2GHZ)
2455 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
2457 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
2459 bitrates = sband->bitrates;
2460 mandatory_rates = 0;
2461 for (i = 0; i < sband->n_bitrates; i++)
2462 if (bitrates[i].flags & mandatory_flag)
2463 mandatory_rates |= BIT(i);
2464 return mandatory_rates;
2467 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2468 struct ieee80211_mgmt *mgmt,
2470 struct ieee80211_rx_status *rx_status,
2471 struct ieee802_11_elems *elems)
2473 struct ieee80211_local *local = sdata->local;
2475 struct ieee80211_sta_bss *bss;
2476 struct sta_info *sta;
2477 struct ieee80211_channel *channel;
2478 u64 beacon_timestamp, rx_timestamp;
2480 bool beacon = ieee80211_is_beacon(mgmt->frame_control);
2481 enum ieee80211_band band = rx_status->band;
2482 DECLARE_MAC_BUF(mac);
2483 DECLARE_MAC_BUF(mac2);
2485 if (elems->ds_params && elems->ds_params_len == 1)
2486 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
2488 freq = rx_status->freq;
2490 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2492 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2495 if (ieee80211_vif_is_mesh(&sdata->vif) && elems->mesh_id &&
2496 elems->mesh_config && mesh_matches_local(elems, sdata)) {
2497 supp_rates = ieee80211_sta_get_rates(local, elems, band);
2499 mesh_neighbour_update(mgmt->sa, supp_rates, sdata,
2500 mesh_peer_accepts_plinks(elems));
2503 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems->supp_rates &&
2504 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
2505 supp_rates = ieee80211_sta_get_rates(local, elems, band);
2509 sta = sta_info_get(local, mgmt->sa);
2513 prev_rates = sta->supp_rates[band];
2514 /* make sure mandatory rates are always added */
2515 sta->supp_rates[band] = supp_rates |
2516 ieee80211_sta_get_mandatory_rates(local, band);
2518 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2519 if (sta->supp_rates[band] != prev_rates)
2520 printk(KERN_DEBUG "%s: updated supp_rates set "
2521 "for %s based on beacon info (0x%llx | "
2522 "0x%llx -> 0x%llx)\n",
2523 sdata->dev->name, print_mac(mac, sta->addr),
2524 (unsigned long long) prev_rates,
2525 (unsigned long long) supp_rates,
2526 (unsigned long long) sta->supp_rates[band]);
2529 ieee80211_ibss_add_sta(sdata, NULL, mgmt->bssid,
2530 mgmt->sa, supp_rates);
2536 #ifdef CONFIG_MAC80211_MESH
2537 if (elems->mesh_config)
2538 bss = ieee80211_rx_mesh_bss_get(local, elems->mesh_id,
2539 elems->mesh_id_len, elems->mesh_config, freq);
2542 bss = ieee80211_rx_bss_get(local, mgmt->bssid, freq,
2543 elems->ssid, elems->ssid_len);
2545 #ifdef CONFIG_MAC80211_MESH
2546 if (elems->mesh_config)
2547 bss = ieee80211_rx_mesh_bss_add(local, elems->mesh_id,
2548 elems->mesh_id_len, elems->mesh_config,
2549 elems->mesh_config_len, freq);
2552 bss = ieee80211_rx_bss_add(sdata, mgmt->bssid, freq,
2553 elems->ssid, elems->ssid_len);
2558 /* TODO: order by RSSI? */
2559 spin_lock_bh(&local->sta_bss_lock);
2560 list_move_tail(&bss->list, &local->sta_bss_list);
2561 spin_unlock_bh(&local->sta_bss_lock);
2565 /* save the ERP value so that it is available at association time */
2566 if (elems->erp_info && elems->erp_info_len >= 1) {
2567 bss->erp_value = elems->erp_info[0];
2568 bss->has_erp_value = 1;
2571 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2572 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2575 struct ieee80211_tim_ie *tim_ie =
2576 (struct ieee80211_tim_ie *)elems->tim;
2577 bss->dtim_period = tim_ie->dtim_period;
2580 /* set default value for buggy APs */
2581 if (!elems->tim || bss->dtim_period == 0)
2582 bss->dtim_period = 1;
2584 bss->supp_rates_len = 0;
2585 if (elems->supp_rates) {
2586 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2587 if (clen > elems->supp_rates_len)
2588 clen = elems->supp_rates_len;
2589 memcpy(&bss->supp_rates[bss->supp_rates_len], elems->supp_rates,
2591 bss->supp_rates_len += clen;
2593 if (elems->ext_supp_rates) {
2594 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2595 if (clen > elems->ext_supp_rates_len)
2596 clen = elems->ext_supp_rates_len;
2597 memcpy(&bss->supp_rates[bss->supp_rates_len],
2598 elems->ext_supp_rates, clen);
2599 bss->supp_rates_len += clen;
2604 beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2606 bss->timestamp = beacon_timestamp;
2607 bss->last_update = jiffies;
2608 bss->signal = rx_status->signal;
2609 bss->noise = rx_status->noise;
2610 bss->qual = rx_status->qual;
2612 bss->last_probe_resp = jiffies;
2614 * In STA mode, the remaining parameters should not be overridden
2615 * by beacons because they're not necessarily accurate there.
2617 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2618 bss->last_probe_resp && beacon) {
2619 ieee80211_rx_bss_put(local, bss);
2623 if (bss->ies == NULL || bss->ies_len < elems->total_len) {
2625 bss->ies = kmalloc(elems->total_len, GFP_ATOMIC);
2628 memcpy(bss->ies, elems->ie_start, elems->total_len);
2629 bss->ies_len = elems->total_len;
2633 bss->wmm_used = elems->wmm_param || elems->wmm_info;
2635 /* check if we need to merge IBSS */
2636 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2637 !local->sta_sw_scanning && !local->sta_hw_scanning &&
2638 bss->capability & WLAN_CAPABILITY_IBSS &&
2639 bss->freq == local->oper_channel->center_freq &&
2640 elems->ssid_len == sdata->u.sta.ssid_len &&
2641 memcmp(elems->ssid, sdata->u.sta.ssid,
2642 sdata->u.sta.ssid_len) == 0) {
2643 if (rx_status->flag & RX_FLAG_TSFT) {
2644 /* in order for correct IBSS merging we need mactime
2646 * since mactime is defined as the time the first data
2647 * symbol of the frame hits the PHY, and the timestamp
2648 * of the beacon is defined as "the time that the data
2649 * symbol containing the first bit of the timestamp is
2650 * transmitted to the PHY plus the transmitting STA’s
2651 * delays through its local PHY from the MAC-PHY
2652 * interface to its interface with the WM"
2653 * (802.11 11.1.2) - equals the time this bit arrives at
2654 * the receiver - we have to take into account the
2655 * offset between the two.
2656 * e.g: at 1 MBit that means mactime is 192 usec earlier
2657 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2659 int rate = local->hw.wiphy->bands[band]->
2660 bitrates[rx_status->rate_idx].bitrate;
2661 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2662 } else if (local && local->ops && local->ops->get_tsf)
2663 /* second best option: get current TSF */
2664 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2666 /* can't merge without knowing the TSF */
2667 rx_timestamp = -1LLU;
2668 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2669 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2670 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2671 print_mac(mac, mgmt->sa),
2672 print_mac(mac2, mgmt->bssid),
2673 (unsigned long long)rx_timestamp,
2674 (unsigned long long)beacon_timestamp,
2675 (unsigned long long)(rx_timestamp - beacon_timestamp),
2677 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2678 if (beacon_timestamp > rx_timestamp) {
2679 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2680 printk(KERN_DEBUG "%s: beacon TSF higher than "
2681 "local TSF - IBSS merge with BSSID %s\n",
2682 sdata->dev->name, print_mac(mac, mgmt->bssid));
2684 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
2685 ieee80211_ibss_add_sta(sdata, NULL,
2686 mgmt->bssid, mgmt->sa,
2691 ieee80211_rx_bss_put(local, bss);
2695 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2696 struct ieee80211_mgmt *mgmt,
2698 struct ieee80211_rx_status *rx_status)
2701 struct ieee802_11_elems elems;
2702 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2704 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
2705 return; /* ignore ProbeResp to foreign address */
2707 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2711 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2714 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2716 /* direct probe may be part of the association flow */
2717 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
2719 printk(KERN_DEBUG "%s direct probe responded\n",
2721 ieee80211_authenticate(sdata, ifsta);
2726 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2727 struct ieee80211_mgmt *mgmt,
2729 struct ieee80211_rx_status *rx_status)
2731 struct ieee80211_if_sta *ifsta;
2733 struct ieee802_11_elems elems;
2734 struct ieee80211_local *local = sdata->local;
2735 struct ieee80211_conf *conf = &local->hw.conf;
2738 /* Process beacon from the current BSS */
2739 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2743 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2745 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2747 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2749 ifsta = &sdata->u.sta;
2751 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2752 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2755 /* Do not send changes to driver if we are scanning. This removes
2756 * requirement that a driver's bss_info_changed/conf_tx functions
2757 * need to be atomic.
2758 * This is really ugly code, we should rewrite scanning and make
2759 * all this more understandable for humans.
2761 if (local->sta_sw_scanning || local->sta_hw_scanning)
2764 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
2765 elems.wmm_param_len);
2767 if (elems.erp_info && elems.erp_info_len >= 1)
2768 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2770 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
2771 changed |= ieee80211_handle_protect_preamb(sdata, false,
2772 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
2775 if (elems.ht_cap_elem && elems.ht_info_elem &&
2776 elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2777 struct ieee80211_ht_bss_info bss_info;
2779 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2780 (struct ieee80211_ht_addt_info *)
2781 elems.ht_info_elem, &bss_info);
2782 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2786 ieee80211_bss_info_change_notify(sdata, changed);
2790 static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
2791 struct ieee80211_if_sta *ifsta,
2792 struct ieee80211_mgmt *mgmt,
2794 struct ieee80211_rx_status *rx_status)
2796 struct ieee80211_local *local = sdata->local;
2798 struct sk_buff *skb;
2799 struct ieee80211_mgmt *resp;
2801 DECLARE_MAC_BUF(mac);
2802 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2803 DECLARE_MAC_BUF(mac2);
2804 DECLARE_MAC_BUF(mac3);
2807 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2808 ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
2809 len < 24 + 2 || !ifsta->probe_resp)
2812 if (local->ops->tx_last_beacon)
2813 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2817 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2818 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2819 "%s (tx_last_beacon=%d)\n",
2820 sdata->dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2821 print_mac(mac3, mgmt->bssid), tx_last_beacon);
2822 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2824 if (!tx_last_beacon)
2827 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2828 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2831 end = ((u8 *) mgmt) + len;
2832 pos = mgmt->u.probe_req.variable;
2833 if (pos[0] != WLAN_EID_SSID ||
2834 pos + 2 + pos[1] > end) {
2835 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2836 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2838 sdata->dev->name, print_mac(mac, mgmt->sa));
2843 (pos[1] != ifsta->ssid_len ||
2844 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2845 /* Ignore ProbeReq for foreign SSID */
2849 /* Reply with ProbeResp */
2850 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
2854 resp = (struct ieee80211_mgmt *) skb->data;
2855 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2856 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2857 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2858 sdata->dev->name, print_mac(mac, resp->da));
2859 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2860 ieee80211_sta_tx(sdata, skb, 0);
2863 static void ieee80211_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
2864 struct ieee80211_if_sta *ifsta,
2865 struct ieee80211_mgmt *mgmt,
2867 struct ieee80211_rx_status *rx_status)
2869 struct ieee80211_local *local = sdata->local;
2871 /* all categories we currently handle have action_code */
2872 if (len < IEEE80211_MIN_ACTION_SIZE + 1)
2875 switch (mgmt->u.action.category) {
2876 case WLAN_CATEGORY_SPECTRUM_MGMT:
2877 if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ)
2879 switch (mgmt->u.action.u.measurement.action_code) {
2880 case WLAN_ACTION_SPCT_MSR_REQ:
2881 if (len < (IEEE80211_MIN_ACTION_SIZE +
2882 sizeof(mgmt->u.action.u.measurement)))
2884 ieee80211_sta_process_measurement_req(sdata, mgmt, len);
2888 case WLAN_CATEGORY_BACK:
2889 switch (mgmt->u.action.u.addba_req.action_code) {
2890 case WLAN_ACTION_ADDBA_REQ:
2891 if (len < (IEEE80211_MIN_ACTION_SIZE +
2892 sizeof(mgmt->u.action.u.addba_req)))
2894 ieee80211_sta_process_addba_request(local, mgmt, len);
2896 case WLAN_ACTION_ADDBA_RESP:
2897 if (len < (IEEE80211_MIN_ACTION_SIZE +
2898 sizeof(mgmt->u.action.u.addba_resp)))
2900 ieee80211_sta_process_addba_resp(local, mgmt, len);
2902 case WLAN_ACTION_DELBA:
2903 if (len < (IEEE80211_MIN_ACTION_SIZE +
2904 sizeof(mgmt->u.action.u.delba)))
2906 ieee80211_sta_process_delba(sdata, mgmt, len);
2910 case PLINK_CATEGORY:
2911 if (ieee80211_vif_is_mesh(&sdata->vif))
2912 mesh_rx_plink_frame(sdata, mgmt, len, rx_status);
2914 case MESH_PATH_SEL_CATEGORY:
2915 if (ieee80211_vif_is_mesh(&sdata->vif))
2916 mesh_rx_path_sel_frame(sdata, mgmt, len);
2921 void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
2922 struct ieee80211_rx_status *rx_status)
2924 struct ieee80211_local *local = sdata->local;
2925 struct ieee80211_if_sta *ifsta;
2926 struct ieee80211_mgmt *mgmt;
2932 ifsta = &sdata->u.sta;
2934 mgmt = (struct ieee80211_mgmt *) skb->data;
2935 fc = le16_to_cpu(mgmt->frame_control);
2937 switch (fc & IEEE80211_FCTL_STYPE) {
2938 case IEEE80211_STYPE_PROBE_REQ:
2939 case IEEE80211_STYPE_PROBE_RESP:
2940 case IEEE80211_STYPE_BEACON:
2941 case IEEE80211_STYPE_ACTION:
2942 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2943 case IEEE80211_STYPE_AUTH:
2944 case IEEE80211_STYPE_ASSOC_RESP:
2945 case IEEE80211_STYPE_REASSOC_RESP:
2946 case IEEE80211_STYPE_DEAUTH:
2947 case IEEE80211_STYPE_DISASSOC:
2948 skb_queue_tail(&ifsta->skb_queue, skb);
2949 queue_work(local->hw.workqueue, &ifsta->work);
2957 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2958 struct sk_buff *skb)
2960 struct ieee80211_rx_status *rx_status;
2961 struct ieee80211_if_sta *ifsta;
2962 struct ieee80211_mgmt *mgmt;
2965 ifsta = &sdata->u.sta;
2967 rx_status = (struct ieee80211_rx_status *) skb->cb;
2968 mgmt = (struct ieee80211_mgmt *) skb->data;
2969 fc = le16_to_cpu(mgmt->frame_control);
2971 switch (fc & IEEE80211_FCTL_STYPE) {
2972 case IEEE80211_STYPE_PROBE_REQ:
2973 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len,
2976 case IEEE80211_STYPE_PROBE_RESP:
2977 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
2979 case IEEE80211_STYPE_BEACON:
2980 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2982 case IEEE80211_STYPE_AUTH:
2983 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
2985 case IEEE80211_STYPE_ASSOC_RESP:
2986 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
2988 case IEEE80211_STYPE_REASSOC_RESP:
2989 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
2991 case IEEE80211_STYPE_DEAUTH:
2992 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
2994 case IEEE80211_STYPE_DISASSOC:
2995 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
2997 case IEEE80211_STYPE_ACTION:
2998 ieee80211_rx_mgmt_action(sdata, ifsta, mgmt, skb->len, rx_status);
3007 ieee80211_sta_rx_scan(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
3008 struct ieee80211_rx_status *rx_status)
3010 struct ieee80211_mgmt *mgmt;
3014 return RX_DROP_UNUSABLE;
3016 mgmt = (struct ieee80211_mgmt *) skb->data;
3017 fc = mgmt->frame_control;
3019 if (ieee80211_is_ctl(fc))
3023 return RX_DROP_MONITOR;
3025 if (ieee80211_is_probe_resp(fc)) {
3026 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
3031 if (ieee80211_is_beacon(fc)) {
3032 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3041 static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
3043 struct ieee80211_local *local = sdata->local;
3045 struct sta_info *sta;
3049 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3050 if (sta->sdata == sdata &&
3051 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3064 static void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, unsigned long exp_time)
3066 struct ieee80211_local *local = sdata->local;
3067 struct sta_info *sta, *tmp;
3068 LIST_HEAD(tmp_list);
3069 DECLARE_MAC_BUF(mac);
3070 unsigned long flags;
3072 spin_lock_irqsave(&local->sta_lock, flags);
3073 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
3074 if (time_after(jiffies, sta->last_rx + exp_time)) {
3075 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3076 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
3077 sdata->dev->name, print_mac(mac, sta->addr));
3079 __sta_info_unlink(&sta);
3081 list_add(&sta->list, &tmp_list);
3083 spin_unlock_irqrestore(&local->sta_lock, flags);
3085 list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3086 sta_info_destroy(sta);
3090 static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
3091 struct ieee80211_if_sta *ifsta)
3093 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3095 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
3096 if (ieee80211_sta_active_ibss(sdata))
3099 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3100 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
3101 ieee80211_sta_req_scan(sdata, ifsta->ssid, ifsta->ssid_len);
3105 #ifdef CONFIG_MAC80211_MESH
3106 static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata,
3107 struct ieee80211_if_sta *ifsta)
3111 ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3112 mesh_path_expire(sdata);
3114 free_plinks = mesh_plink_availables(sdata);
3115 if (free_plinks != sdata->u.sta.accepting_plinks)
3116 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
3118 mod_timer(&ifsta->timer, jiffies +
3119 IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3123 void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
3125 struct ieee80211_if_sta *ifsta;
3126 ifsta = &sdata->u.sta;
3127 ifsta->state = IEEE80211_STA_MLME_MESH_UP;
3128 ieee80211_sta_timer((unsigned long)sdata);
3129 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
3134 void ieee80211_sta_timer(unsigned long data)
3136 struct ieee80211_sub_if_data *sdata =
3137 (struct ieee80211_sub_if_data *) data;
3138 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3139 struct ieee80211_local *local = sdata->local;
3141 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3142 queue_work(local->hw.workqueue, &ifsta->work);
3145 void ieee80211_sta_work(struct work_struct *work)
3147 struct ieee80211_sub_if_data *sdata =
3148 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3149 struct ieee80211_local *local = sdata->local;
3150 struct ieee80211_if_sta *ifsta;
3151 struct sk_buff *skb;
3153 if (!netif_running(sdata->dev))
3156 if (local->sta_sw_scanning || local->sta_hw_scanning)
3159 if (WARN_ON(sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3160 sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3161 sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT))
3163 ifsta = &sdata->u.sta;
3165 while ((skb = skb_dequeue(&ifsta->skb_queue)))
3166 ieee80211_sta_rx_queued_mgmt(sdata, skb);
3168 #ifdef CONFIG_MAC80211_MESH
3169 if (ifsta->preq_queue_len &&
3171 ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3172 mesh_path_start_discovery(sdata);
3175 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
3176 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
3177 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
3178 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3179 if (ifsta->scan_ssid_len)
3180 ieee80211_sta_start_scan(sdata, ifsta->scan_ssid, ifsta->scan_ssid_len);
3182 ieee80211_sta_start_scan(sdata, NULL, 0);
3186 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3187 if (ieee80211_sta_config_auth(sdata, ifsta))
3189 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3190 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3193 switch (ifsta->state) {
3194 case IEEE80211_STA_MLME_DISABLED:
3196 case IEEE80211_STA_MLME_DIRECT_PROBE:
3197 ieee80211_direct_probe(sdata, ifsta);
3199 case IEEE80211_STA_MLME_AUTHENTICATE:
3200 ieee80211_authenticate(sdata, ifsta);
3202 case IEEE80211_STA_MLME_ASSOCIATE:
3203 ieee80211_associate(sdata, ifsta);
3205 case IEEE80211_STA_MLME_ASSOCIATED:
3206 ieee80211_associated(sdata, ifsta);
3208 case IEEE80211_STA_MLME_IBSS_SEARCH:
3209 ieee80211_sta_find_ibss(sdata, ifsta);
3211 case IEEE80211_STA_MLME_IBSS_JOINED:
3212 ieee80211_sta_merge_ibss(sdata, ifsta);
3214 #ifdef CONFIG_MAC80211_MESH
3215 case IEEE80211_STA_MLME_MESH_UP:
3216 ieee80211_mesh_housekeeping(sdata, ifsta);
3224 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
3225 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3226 "mixed-cell disabled - disassociate\n", sdata->dev->name);
3228 ieee80211_set_disassoc(sdata, ifsta, false, true,
3229 WLAN_REASON_UNSPECIFIED);
3234 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
3235 struct ieee80211_if_sta *ifsta)
3237 struct ieee80211_local *local = sdata->local;
3239 if (local->ops->reset_tsf) {
3240 /* Reset own TSF to allow time synchronization work. */
3241 local->ops->reset_tsf(local_to_hw(local));
3244 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3247 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3248 ifsta->auth_alg = WLAN_AUTH_OPEN;
3249 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3250 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3251 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3252 ifsta->auth_alg = WLAN_AUTH_LEAP;
3254 ifsta->auth_alg = WLAN_AUTH_OPEN;
3255 ifsta->auth_transaction = -1;
3256 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3257 ifsta->assoc_scan_tries = 0;
3258 ifsta->direct_probe_tries = 0;
3259 ifsta->auth_tries = 0;
3260 ifsta->assoc_tries = 0;
3261 netif_carrier_off(sdata->dev);
3265 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
3266 struct ieee80211_if_sta *ifsta)
3268 struct ieee80211_local *local = sdata->local;
3270 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3273 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3274 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3275 (ifsta->flags & (IEEE80211_STA_SSID_SET |
3276 IEEE80211_STA_AUTO_SSID_SEL))) {
3277 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3278 queue_work(local->hw.workqueue, &ifsta->work);
3282 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3283 const char *ssid, int ssid_len)
3285 int tmp, hidden_ssid;
3287 if (ssid_len == ifsta->ssid_len &&
3288 !memcmp(ifsta->ssid, ssid, ssid_len))
3291 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
3297 if (ssid[tmp] != '\0') {
3303 if (hidden_ssid && ifsta->ssid_len == ssid_len)
3306 if (ssid_len == 1 && ssid[0] == ' ')
3312 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
3313 struct ieee80211_if_sta *ifsta)
3315 struct ieee80211_local *local = sdata->local;
3316 struct ieee80211_sta_bss *bss, *selected = NULL;
3317 int top_rssi = 0, freq;
3319 spin_lock_bh(&local->sta_bss_lock);
3320 freq = local->oper_channel->center_freq;
3321 list_for_each_entry(bss, &local->sta_bss_list, list) {
3322 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3325 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3326 IEEE80211_STA_AUTO_BSSID_SEL |
3327 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
3328 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3329 !!sdata->default_key))
3332 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3336 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3337 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3340 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3341 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3344 if (!selected || top_rssi < bss->signal) {
3346 top_rssi = bss->signal;
3350 atomic_inc(&selected->users);
3351 spin_unlock_bh(&local->sta_bss_lock);
3354 ieee80211_set_freq(sdata, selected->freq);
3355 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3356 ieee80211_sta_set_ssid(sdata, selected->ssid,
3357 selected->ssid_len);
3358 ieee80211_sta_set_bssid(sdata, selected->bssid);
3359 ieee80211_sta_def_wmm_params(sdata, selected, 0);
3361 /* Send out direct probe if no probe resp was received or
3362 * the one we have is outdated
3364 if (!selected->last_probe_resp ||
3365 time_after(jiffies, selected->last_probe_resp
3366 + IEEE80211_SCAN_RESULT_EXPIRE))
3367 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
3369 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
3371 ieee80211_rx_bss_put(local, selected);
3372 ieee80211_sta_reset_auth(sdata, ifsta);
3375 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
3376 ifsta->assoc_scan_tries++;
3377 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3378 ieee80211_sta_start_scan(sdata, NULL, 0);
3380 ieee80211_sta_start_scan(sdata, ifsta->ssid,
3382 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
3383 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3385 ifsta->state = IEEE80211_STA_MLME_DISABLED;
3391 static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
3392 struct ieee80211_if_sta *ifsta)
3394 struct ieee80211_local *local = sdata->local;
3395 struct ieee80211_sta_bss *bss;
3396 struct ieee80211_supported_band *sband;
3397 u8 bssid[ETH_ALEN], *pos;
3400 DECLARE_MAC_BUF(mac);
3403 /* Easier testing, use fixed BSSID. */
3404 memset(bssid, 0xfe, ETH_ALEN);
3406 /* Generate random, not broadcast, locally administered BSSID. Mix in
3407 * own MAC address to make sure that devices that do not have proper
3408 * random number generator get different BSSID. */
3409 get_random_bytes(bssid, ETH_ALEN);
3410 for (i = 0; i < ETH_ALEN; i++)
3411 bssid[i] ^= sdata->dev->dev_addr[i];
3416 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3417 sdata->dev->name, print_mac(mac, bssid));
3419 bss = ieee80211_rx_bss_add(sdata, bssid,
3420 local->hw.conf.channel->center_freq,
3421 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3425 bss->band = local->hw.conf.channel->band;
3426 sband = local->hw.wiphy->bands[bss->band];
3428 if (local->hw.conf.beacon_int == 0)
3429 local->hw.conf.beacon_int = 100;
3430 bss->beacon_int = local->hw.conf.beacon_int;
3431 bss->last_update = jiffies;
3432 bss->capability = WLAN_CAPABILITY_IBSS;
3434 if (sdata->default_key)
3435 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3437 sdata->drop_unencrypted = 0;
3439 bss->supp_rates_len = sband->n_bitrates;
3440 pos = bss->supp_rates;
3441 for (i = 0; i < sband->n_bitrates; i++) {
3442 int rate = sband->bitrates[i].bitrate;
3443 *pos++ = (u8) (rate / 5);
3446 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3447 ieee80211_rx_bss_put(local, bss);
3452 static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
3453 struct ieee80211_if_sta *ifsta)
3455 struct ieee80211_local *local = sdata->local;
3456 struct ieee80211_sta_bss *bss;
3460 DECLARE_MAC_BUF(mac);
3461 DECLARE_MAC_BUF(mac2);
3463 if (ifsta->ssid_len == 0)
3466 active_ibss = ieee80211_sta_active_ibss(sdata);
3467 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3468 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3469 sdata->dev->name, active_ibss);
3470 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3471 spin_lock_bh(&local->sta_bss_lock);
3472 list_for_each_entry(bss, &local->sta_bss_list, list) {
3473 if (ifsta->ssid_len != bss->ssid_len ||
3474 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3475 || !(bss->capability & WLAN_CAPABILITY_IBSS))
3477 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3478 printk(KERN_DEBUG " bssid=%s found\n",
3479 print_mac(mac, bss->bssid));
3480 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3481 memcpy(bssid, bss->bssid, ETH_ALEN);
3483 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3486 spin_unlock_bh(&local->sta_bss_lock);
3488 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3490 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
3491 "%s\n", print_mac(mac, bssid),
3492 print_mac(mac2, ifsta->bssid));
3493 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3495 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3499 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
3500 search_freq = bss->freq;
3502 search_freq = local->hw.conf.channel->center_freq;
3504 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
3505 ifsta->ssid, ifsta->ssid_len);
3509 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3510 " based on configured SSID\n",
3511 sdata->dev->name, print_mac(mac, bssid));
3512 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3513 ieee80211_rx_bss_put(local, bss);
3518 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3519 printk(KERN_DEBUG " did not try to join ibss\n");
3520 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3522 /* Selected IBSS not found in current scan results - try to scan */
3523 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
3524 !ieee80211_sta_active_ibss(sdata)) {
3525 mod_timer(&ifsta->timer, jiffies +
3526 IEEE80211_IBSS_MERGE_INTERVAL);
3527 } else if (time_after(jiffies, local->last_scan_completed +
3528 IEEE80211_SCAN_INTERVAL)) {
3529 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3530 "join\n", sdata->dev->name);
3531 return ieee80211_sta_req_scan(sdata, ifsta->ssid,
3533 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
3534 int interval = IEEE80211_SCAN_INTERVAL;
3536 if (time_after(jiffies, ifsta->ibss_join_req +
3537 IEEE80211_IBSS_JOIN_TIMEOUT)) {
3538 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3539 (!(local->oper_channel->flags &
3540 IEEE80211_CHAN_NO_IBSS)))
3541 return ieee80211_sta_create_ibss(sdata, ifsta);
3542 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3543 printk(KERN_DEBUG "%s: IBSS not allowed on"
3544 " %d MHz\n", sdata->dev->name,
3545 local->hw.conf.channel->center_freq);
3548 /* No IBSS found - decrease scan interval and continue
3550 interval = IEEE80211_SCAN_INTERVAL_SLOW;
3553 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
3554 mod_timer(&ifsta->timer, jiffies + interval);
3562 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
3564 struct ieee80211_if_sta *ifsta;
3567 if (len > IEEE80211_MAX_SSID_LEN)
3570 ifsta = &sdata->u.sta;
3572 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
3573 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
3574 memcpy(ifsta->ssid, ssid, len);
3575 ifsta->ssid_len = len;
3576 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3580 * Hack! MLME code needs to be cleaned up to have different
3581 * entry points for configuration and internal selection change
3583 if (netif_running(sdata->dev))
3584 res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID);
3586 printk(KERN_DEBUG "%s: Failed to config new SSID to "
3587 "the low-level driver\n", sdata->dev->name);
3593 ifsta->flags |= IEEE80211_STA_SSID_SET;
3595 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3597 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3598 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3599 ifsta->ibss_join_req = jiffies;
3600 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
3601 return ieee80211_sta_find_ibss(sdata, ifsta);
3608 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
3610 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3611 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3612 *len = ifsta->ssid_len;
3617 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
3619 struct ieee80211_if_sta *ifsta;
3622 ifsta = &sdata->u.sta;
3624 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3625 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3628 * Hack! See also ieee80211_sta_set_ssid.
3630 if (netif_running(sdata->dev))
3631 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
3633 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3634 "the low-level driver\n", sdata->dev->name);
3639 if (is_valid_ether_addr(bssid))
3640 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3642 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3648 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3649 struct ieee80211_sub_if_data *sdata,
3652 struct sk_buff *skb;
3653 struct ieee80211_hdr *nullfunc;
3656 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3658 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3659 "frame\n", sdata->dev->name);
3662 skb_reserve(skb, local->hw.extra_tx_headroom);
3664 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3665 memset(nullfunc, 0, 24);
3666 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3667 IEEE80211_FCTL_TODS);
3669 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
3670 nullfunc->frame_control = fc;
3671 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3672 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3673 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3675 ieee80211_sta_tx(sdata, skb, 0);
3679 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3681 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3682 ieee80211_vif_is_mesh(&sdata->vif))
3683 ieee80211_sta_timer((unsigned long)sdata);
3686 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3688 struct ieee80211_local *local = hw_to_local(hw);
3689 struct net_device *dev = local->scan_dev;
3690 struct ieee80211_sub_if_data *sdata;
3691 union iwreq_data wrqu;
3693 local->last_scan_completed = jiffies;
3694 memset(&wrqu, 0, sizeof(wrqu));
3695 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3697 if (local->sta_hw_scanning) {
3698 local->sta_hw_scanning = 0;
3699 if (ieee80211_hw_config(local))
3700 printk(KERN_DEBUG "%s: failed to restore operational "
3701 "channel after scan\n", dev->name);
3702 /* Restart STA timer for HW scan case */
3704 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3705 ieee80211_restart_sta_timer(sdata);
3711 local->sta_sw_scanning = 0;
3712 if (ieee80211_hw_config(local))
3713 printk(KERN_DEBUG "%s: failed to restore operational "
3714 "channel after scan\n", dev->name);
3717 netif_tx_lock_bh(local->mdev);
3718 netif_addr_lock(local->mdev);
3719 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3720 local->ops->configure_filter(local_to_hw(local),
3721 FIF_BCN_PRBRESP_PROMISC,
3722 &local->filter_flags,
3723 local->mdev->mc_count,
3724 local->mdev->mc_list);
3726 netif_addr_unlock(local->mdev);
3727 netif_tx_unlock_bh(local->mdev);
3730 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3731 /* Tell AP we're back */
3732 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3733 sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3734 ieee80211_send_nullfunc(local, sdata, 0);
3736 ieee80211_restart_sta_timer(sdata);
3738 netif_wake_queue(sdata->dev);
3743 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3744 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3745 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3746 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3747 (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) &&
3748 !ieee80211_sta_active_ibss(sdata)))
3749 ieee80211_sta_find_ibss(sdata, ifsta);
3752 EXPORT_SYMBOL(ieee80211_scan_completed);
3754 void ieee80211_sta_scan_work(struct work_struct *work)
3756 struct ieee80211_local *local =
3757 container_of(work, struct ieee80211_local, scan_work.work);
3758 struct net_device *dev = local->scan_dev;
3759 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3760 struct ieee80211_supported_band *sband;
3761 struct ieee80211_channel *chan;
3763 unsigned long next_delay = 0;
3765 if (!local->sta_sw_scanning)
3768 switch (local->scan_state) {
3769 case SCAN_SET_CHANNEL:
3771 * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3772 * after we successfully scanned the last channel of the last
3773 * band (and the last band is supported by the hw)
3775 if (local->scan_band < IEEE80211_NUM_BANDS)
3776 sband = local->hw.wiphy->bands[local->scan_band];
3781 * If we are at an unsupported band and have more bands
3782 * left to scan, advance to the next supported one.
3784 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
3786 sband = local->hw.wiphy->bands[local->scan_band];
3787 local->scan_channel_idx = 0;
3790 /* if no more bands/channels left, complete scan */
3791 if (!sband || local->scan_channel_idx >= sband->n_channels) {
3792 ieee80211_scan_completed(local_to_hw(local));
3796 chan = &sband->channels[local->scan_channel_idx];
3798 if (chan->flags & IEEE80211_CHAN_DISABLED ||
3799 (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3800 chan->flags & IEEE80211_CHAN_NO_IBSS))
3804 local->scan_channel = chan;
3805 if (ieee80211_hw_config(local)) {
3806 printk(KERN_DEBUG "%s: failed to set freq to "
3807 "%d MHz for scan\n", dev->name,
3813 /* advance state machine to next channel/band */
3814 local->scan_channel_idx++;
3815 if (local->scan_channel_idx >= sband->n_channels) {
3817 * scan_band may end up == IEEE80211_NUM_BANDS, but
3818 * we'll catch that case above and complete the scan
3819 * if that is the case.
3822 local->scan_channel_idx = 0;
3828 next_delay = IEEE80211_PROBE_DELAY +
3829 usecs_to_jiffies(local->hw.channel_change_time);
3830 local->scan_state = SCAN_SEND_PROBE;
3832 case SCAN_SEND_PROBE:
3833 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3834 local->scan_state = SCAN_SET_CHANNEL;
3836 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3838 ieee80211_send_probe_req(sdata, NULL, local->scan_ssid,
3839 local->scan_ssid_len);
3840 next_delay = IEEE80211_CHANNEL_TIME;
3844 if (local->sta_sw_scanning)
3845 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3850 static int ieee80211_sta_start_scan(struct ieee80211_sub_if_data *scan_sdata,
3851 u8 *ssid, size_t ssid_len)
3853 struct ieee80211_local *local = scan_sdata->local;
3854 struct ieee80211_sub_if_data *sdata;
3856 if (ssid_len > IEEE80211_MAX_SSID_LEN)
3859 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
3860 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3863 * ScanType: ACTIVE, PASSIVE
3864 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3865 * a Probe frame during active scanning
3867 * MinChannelTime (>= ProbeDelay), in TU
3868 * MaxChannelTime: (>= MinChannelTime), in TU
3871 /* MLME-SCAN.confirm
3873 * ResultCode: SUCCESS, INVALID_PARAMETERS
3876 if (local->sta_sw_scanning || local->sta_hw_scanning) {
3877 if (local->scan_dev == scan_sdata->dev)
3882 if (local->ops->hw_scan) {
3883 int rc = local->ops->hw_scan(local_to_hw(local),
3886 local->sta_hw_scanning = 1;
3887 local->scan_dev = scan_sdata->dev;
3892 local->sta_sw_scanning = 1;
3895 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3896 netif_stop_queue(sdata->dev);
3897 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3898 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
3899 ieee80211_send_nullfunc(local, sdata, 1);
3904 local->scan_ssid_len = ssid_len;
3905 memcpy(local->scan_ssid, ssid, ssid_len);
3907 local->scan_ssid_len = 0;
3908 local->scan_state = SCAN_SET_CHANNEL;
3909 local->scan_channel_idx = 0;
3910 local->scan_band = IEEE80211_BAND_2GHZ;
3911 local->scan_dev = scan_sdata->dev;
3913 netif_addr_lock_bh(local->mdev);
3914 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3915 local->ops->configure_filter(local_to_hw(local),
3916 FIF_BCN_PRBRESP_PROMISC,
3917 &local->filter_flags,
3918 local->mdev->mc_count,
3919 local->mdev->mc_list);
3920 netif_addr_unlock_bh(local->mdev);
3922 /* TODO: start scan as soon as all nullfunc frames are ACKed */
3923 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3924 IEEE80211_CHANNEL_TIME);
3930 int ieee80211_sta_req_scan(struct ieee80211_sub_if_data *sdata, u8 *ssid, size_t ssid_len)
3932 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3933 struct ieee80211_local *local = sdata->local;
3935 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3936 return ieee80211_sta_start_scan(sdata, ssid, ssid_len);
3938 if (local->sta_sw_scanning || local->sta_hw_scanning) {
3939 if (local->scan_dev == sdata->dev)
3944 ifsta->scan_ssid_len = ssid_len;
3946 memcpy(ifsta->scan_ssid, ssid, ssid_len);
3947 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
3948 queue_work(local->hw.workqueue, &ifsta->work);
3953 static void ieee80211_sta_add_scan_ies(struct iw_request_info *info,
3954 struct ieee80211_sta_bss *bss,
3955 char **current_ev, char *end_buf)
3957 u8 *pos, *end, *next;
3958 struct iw_event iwe;
3960 if (bss == NULL || bss->ies == NULL)
3964 * If needed, fragment the IEs buffer (at IE boundaries) into short
3965 * enough fragments to fit into IW_GENERIC_IE_MAX octet messages.
3968 end = pos + bss->ies_len;
3970 while (end - pos > IW_GENERIC_IE_MAX) {
3971 next = pos + 2 + pos[1];
3972 while (next + 2 + next[1] - pos < IW_GENERIC_IE_MAX)
3973 next = next + 2 + next[1];
3975 memset(&iwe, 0, sizeof(iwe));
3976 iwe.cmd = IWEVGENIE;
3977 iwe.u.data.length = next - pos;
3978 *current_ev = iwe_stream_add_point(info, *current_ev,
3979 end_buf, &iwe, pos);
3985 memset(&iwe, 0, sizeof(iwe));
3986 iwe.cmd = IWEVGENIE;
3987 iwe.u.data.length = end - pos;
3988 *current_ev = iwe_stream_add_point(info, *current_ev,
3989 end_buf, &iwe, pos);
3995 ieee80211_sta_scan_result(struct ieee80211_local *local,
3996 struct iw_request_info *info,
3997 struct ieee80211_sta_bss *bss,
3998 char *current_ev, char *end_buf)
4000 struct iw_event iwe;
4002 if (time_after(jiffies,
4003 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
4006 memset(&iwe, 0, sizeof(iwe));
4007 iwe.cmd = SIOCGIWAP;
4008 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
4009 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
4010 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4013 memset(&iwe, 0, sizeof(iwe));
4014 iwe.cmd = SIOCGIWESSID;
4015 if (bss_mesh_cfg(bss)) {
4016 iwe.u.data.length = bss_mesh_id_len(bss);
4017 iwe.u.data.flags = 1;
4018 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4019 &iwe, bss_mesh_id(bss));
4021 iwe.u.data.length = bss->ssid_len;
4022 iwe.u.data.flags = 1;
4023 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4027 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
4028 || bss_mesh_cfg(bss)) {
4029 memset(&iwe, 0, sizeof(iwe));
4030 iwe.cmd = SIOCGIWMODE;
4031 if (bss_mesh_cfg(bss))
4032 iwe.u.mode = IW_MODE_MESH;
4033 else if (bss->capability & WLAN_CAPABILITY_ESS)
4034 iwe.u.mode = IW_MODE_MASTER;
4036 iwe.u.mode = IW_MODE_ADHOC;
4037 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
4038 &iwe, IW_EV_UINT_LEN);
4041 memset(&iwe, 0, sizeof(iwe));
4042 iwe.cmd = SIOCGIWFREQ;
4043 iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
4045 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4048 memset(&iwe, 0, sizeof(iwe));
4049 iwe.cmd = SIOCGIWFREQ;
4050 iwe.u.freq.m = bss->freq;
4052 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4054 memset(&iwe, 0, sizeof(iwe));
4056 iwe.u.qual.qual = bss->qual;
4057 iwe.u.qual.level = bss->signal;
4058 iwe.u.qual.noise = bss->noise;
4059 iwe.u.qual.updated = local->wstats_flags;
4060 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4063 memset(&iwe, 0, sizeof(iwe));
4064 iwe.cmd = SIOCGIWENCODE;
4065 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
4066 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4068 iwe.u.data.flags = IW_ENCODE_DISABLED;
4069 iwe.u.data.length = 0;
4070 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4073 ieee80211_sta_add_scan_ies(info, bss, ¤t_ev, end_buf);
4075 if (bss && bss->supp_rates_len > 0) {
4076 /* display all supported rates in readable format */
4077 char *p = current_ev + iwe_stream_lcp_len(info);
4080 memset(&iwe, 0, sizeof(iwe));
4081 iwe.cmd = SIOCGIWRATE;
4082 /* Those two flags are ignored... */
4083 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4085 for (i = 0; i < bss->supp_rates_len; i++) {
4086 iwe.u.bitrate.value = ((bss->supp_rates[i] &
4088 p = iwe_stream_add_value(info, current_ev, p,
4089 end_buf, &iwe, IW_EV_PARAM_LEN);
4096 buf = kmalloc(30, GFP_ATOMIC);
4098 memset(&iwe, 0, sizeof(iwe));
4099 iwe.cmd = IWEVCUSTOM;
4100 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4101 iwe.u.data.length = strlen(buf);
4102 current_ev = iwe_stream_add_point(info, current_ev,
4105 memset(&iwe, 0, sizeof(iwe));
4106 iwe.cmd = IWEVCUSTOM;
4107 sprintf(buf, " Last beacon: %dms ago",
4108 jiffies_to_msecs(jiffies - bss->last_update));
4109 iwe.u.data.length = strlen(buf);
4110 current_ev = iwe_stream_add_point(info, current_ev,
4111 end_buf, &iwe, buf);
4116 if (bss_mesh_cfg(bss)) {
4118 u8 *cfg = bss_mesh_cfg(bss);
4119 buf = kmalloc(50, GFP_ATOMIC);
4121 memset(&iwe, 0, sizeof(iwe));
4122 iwe.cmd = IWEVCUSTOM;
4123 sprintf(buf, "Mesh network (version %d)", cfg[0]);
4124 iwe.u.data.length = strlen(buf);
4125 current_ev = iwe_stream_add_point(info, current_ev,
4128 sprintf(buf, "Path Selection Protocol ID: "
4129 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4131 iwe.u.data.length = strlen(buf);
4132 current_ev = iwe_stream_add_point(info, current_ev,
4135 sprintf(buf, "Path Selection Metric ID: "
4136 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4138 iwe.u.data.length = strlen(buf);
4139 current_ev = iwe_stream_add_point(info, current_ev,
4142 sprintf(buf, "Congestion Control Mode ID: "
4143 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4145 iwe.u.data.length = strlen(buf);
4146 current_ev = iwe_stream_add_point(info, current_ev,
4149 sprintf(buf, "Channel Precedence: "
4150 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4152 iwe.u.data.length = strlen(buf);
4153 current_ev = iwe_stream_add_point(info, current_ev,
4164 int ieee80211_sta_scan_results(struct ieee80211_local *local,
4165 struct iw_request_info *info,
4166 char *buf, size_t len)
4168 char *current_ev = buf;
4169 char *end_buf = buf + len;
4170 struct ieee80211_sta_bss *bss;
4172 spin_lock_bh(&local->sta_bss_lock);
4173 list_for_each_entry(bss, &local->sta_bss_list, list) {
4174 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4175 spin_unlock_bh(&local->sta_bss_lock);
4178 current_ev = ieee80211_sta_scan_result(local, info, bss,
4179 current_ev, end_buf);
4181 spin_unlock_bh(&local->sta_bss_lock);
4182 return current_ev - buf;
4186 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
4188 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4190 kfree(ifsta->extra_ie);
4192 ifsta->extra_ie = NULL;
4193 ifsta->extra_ie_len = 0;
4196 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4197 if (!ifsta->extra_ie) {
4198 ifsta->extra_ie_len = 0;
4201 memcpy(ifsta->extra_ie, ie, len);
4202 ifsta->extra_ie_len = len;
4207 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
4208 struct sk_buff *skb, u8 *bssid,
4209 u8 *addr, u64 supp_rates)
4211 struct ieee80211_local *local = sdata->local;
4212 struct sta_info *sta;
4213 DECLARE_MAC_BUF(mac);
4214 int band = local->hw.conf.channel->band;
4216 /* TODO: Could consider removing the least recently used entry and
4217 * allow new one to be added. */
4218 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4219 if (net_ratelimit()) {
4220 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
4221 "entry %s\n", sdata->dev->name, print_mac(mac, addr));
4226 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
4229 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
4230 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
4231 wiphy_name(local->hw.wiphy), print_mac(mac, addr), sdata->dev->name);
4234 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4238 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
4240 /* make sure mandatory rates are always added */
4241 sta->supp_rates[band] = supp_rates |
4242 ieee80211_sta_get_mandatory_rates(local, band);
4244 rate_control_rate_init(sta, local);
4246 if (sta_info_insert(sta))
4253 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
4255 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4257 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
4258 sdata->dev->name, reason);
4260 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4261 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
4264 ieee80211_set_disassoc(sdata, ifsta, true, true, reason);
4269 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
4271 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4273 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
4274 sdata->dev->name, reason);
4276 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4279 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
4282 ieee80211_set_disassoc(sdata, ifsta, false, true, reason);
4286 void ieee80211_notify_mac(struct ieee80211_hw *hw,
4287 enum ieee80211_notification_types notif_type)
4289 struct ieee80211_local *local = hw_to_local(hw);
4290 struct ieee80211_sub_if_data *sdata;
4292 switch (notif_type) {
4293 case IEEE80211_NOTIFY_RE_ASSOC:
4295 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4296 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4299 ieee80211_sta_req_auth(sdata, &sdata->u.sta);
4305 EXPORT_SYMBOL(ieee80211_notify_mac);