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.
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/netdevice.h>
18 #include <linux/if_arp.h>
19 #include <linux/wireless.h>
20 #include <linux/random.h>
21 #include <linux/etherdevice.h>
22 #include <linux/rtnetlink.h>
23 #include <net/iw_handler.h>
24 #include <net/mac80211.h>
25 #include <asm/unaligned.h>
27 #include "ieee80211_i.h"
31 #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
32 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
33 #define IEEE80211_AUTH_MAX_TRIES 3
34 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
35 #define IEEE80211_ASSOC_MAX_TRIES 3
36 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
37 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
38 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
39 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
40 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
41 #define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
43 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
44 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
46 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
50 static int ecw2cw(int ecw)
52 return (1 << ecw) - 1;
55 static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
62 end = pos + bss->ies_len;
64 while (pos + 1 < end) {
65 if (pos + 2 + pos[1] > end)
75 static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
76 struct ieee80211_supported_band *sband,
82 for (i = 0; i < bss->supp_rates_len; i++) {
83 int rate = (bss->supp_rates[i] & 0x7F) * 5;
85 for (j = 0; j < sband->n_bitrates; j++)
86 if (sband->bitrates[j].bitrate == rate) {
96 /* also used by mesh code */
97 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
98 struct ieee802_11_elems *elems,
99 enum ieee80211_band band)
101 struct ieee80211_supported_band *sband;
102 struct ieee80211_rate *bitrates;
106 sband = local->hw.wiphy->bands[band];
110 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
113 bitrates = sband->bitrates;
114 num_rates = sband->n_bitrates;
116 for (i = 0; i < elems->supp_rates_len +
117 elems->ext_supp_rates_len; i++) {
120 if (i < elems->supp_rates_len)
121 rate = elems->supp_rates[i];
122 else if (elems->ext_supp_rates)
123 rate = elems->ext_supp_rates
124 [i - elems->supp_rates_len];
125 own_rate = 5 * (rate & 0x7f);
126 for (j = 0; j < num_rates; j++)
127 if (bitrates[j].bitrate == own_rate)
128 supp_rates |= BIT(j);
133 /* frame sending functions */
135 /* also used by scanning code */
136 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
137 u8 *ssid, size_t ssid_len)
139 struct ieee80211_local *local = sdata->local;
140 struct ieee80211_supported_band *sband;
142 struct ieee80211_mgmt *mgmt;
143 u8 *pos, *supp_rates, *esupp_rates = NULL;
146 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
148 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
149 "request\n", sdata->dev->name);
152 skb_reserve(skb, local->hw.extra_tx_headroom);
154 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
156 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
157 IEEE80211_STYPE_PROBE_REQ);
158 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
160 memcpy(mgmt->da, dst, ETH_ALEN);
161 memcpy(mgmt->bssid, dst, ETH_ALEN);
163 memset(mgmt->da, 0xff, ETH_ALEN);
164 memset(mgmt->bssid, 0xff, ETH_ALEN);
166 pos = skb_put(skb, 2 + ssid_len);
167 *pos++ = WLAN_EID_SSID;
169 memcpy(pos, ssid, ssid_len);
171 supp_rates = skb_put(skb, 2);
172 supp_rates[0] = WLAN_EID_SUPP_RATES;
174 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
176 for (i = 0; i < sband->n_bitrates; i++) {
177 struct ieee80211_rate *rate = &sband->bitrates[i];
179 pos = skb_put(skb, 1);
181 } else if (supp_rates[1] == 8) {
182 esupp_rates = skb_put(skb, 3);
183 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
185 pos = &esupp_rates[2];
187 pos = skb_put(skb, 1);
190 *pos = rate->bitrate / 5;
193 ieee80211_tx_skb(sdata, skb, 0);
196 static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
197 struct ieee80211_if_sta *ifsta,
198 int transaction, u8 *extra, size_t extra_len,
201 struct ieee80211_local *local = sdata->local;
203 struct ieee80211_mgmt *mgmt;
205 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
206 sizeof(*mgmt) + 6 + extra_len);
208 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
209 "frame\n", sdata->dev->name);
212 skb_reserve(skb, local->hw.extra_tx_headroom);
214 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
215 memset(mgmt, 0, 24 + 6);
216 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
217 IEEE80211_STYPE_AUTH);
219 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
220 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
221 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
222 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
223 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
224 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
225 ifsta->auth_transaction = transaction + 1;
226 mgmt->u.auth.status_code = cpu_to_le16(0);
228 memcpy(skb_put(skb, extra_len), extra, extra_len);
230 ieee80211_tx_skb(sdata, skb, encrypt);
233 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
234 struct ieee80211_if_sta *ifsta)
236 struct ieee80211_local *local = sdata->local;
238 struct ieee80211_mgmt *mgmt;
239 u8 *pos, *ies, *ht_add_ie;
240 int i, len, count, rates_len, supp_rates_len;
242 struct ieee80211_bss *bss;
244 struct ieee80211_supported_band *sband;
247 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
248 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
251 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
252 "frame\n", sdata->dev->name);
255 skb_reserve(skb, local->hw.extra_tx_headroom);
257 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
259 capab = ifsta->capab;
261 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
262 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
263 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
264 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
265 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
268 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
269 local->hw.conf.channel->center_freq,
270 ifsta->ssid, ifsta->ssid_len);
272 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
273 capab |= WLAN_CAPABILITY_PRIVACY;
277 /* get all rates supported by the device and the AP as
278 * some APs don't like getting a superset of their rates
279 * in the association request (e.g. D-Link DAP 1353 in
281 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
283 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
284 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
285 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
287 ieee80211_rx_bss_put(local, bss);
290 rates_len = sband->n_bitrates;
293 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
295 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
296 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
297 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
299 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
301 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
302 IEEE80211_STYPE_REASSOC_REQ);
303 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
304 mgmt->u.reassoc_req.listen_interval =
305 cpu_to_le16(local->hw.conf.listen_interval);
306 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
310 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
311 IEEE80211_STYPE_ASSOC_REQ);
312 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
313 mgmt->u.reassoc_req.listen_interval =
314 cpu_to_le16(local->hw.conf.listen_interval);
318 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
319 *pos++ = WLAN_EID_SSID;
320 *pos++ = ifsta->ssid_len;
321 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
323 /* add all rates which were marked to be used above */
324 supp_rates_len = rates_len;
325 if (supp_rates_len > 8)
328 len = sband->n_bitrates;
329 pos = skb_put(skb, supp_rates_len + 2);
330 *pos++ = WLAN_EID_SUPP_RATES;
331 *pos++ = supp_rates_len;
334 for (i = 0; i < sband->n_bitrates; i++) {
335 if (BIT(i) & rates) {
336 int rate = sband->bitrates[i].bitrate;
337 *pos++ = (u8) (rate / 5);
343 if (rates_len > count) {
344 pos = skb_put(skb, rates_len - count + 2);
345 *pos++ = WLAN_EID_EXT_SUPP_RATES;
346 *pos++ = rates_len - count;
348 for (i++; i < sband->n_bitrates; i++) {
349 if (BIT(i) & rates) {
350 int rate = sband->bitrates[i].bitrate;
351 *pos++ = (u8) (rate / 5);
356 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
357 /* 1. power capabilities */
358 pos = skb_put(skb, 4);
359 *pos++ = WLAN_EID_PWR_CAPABILITY;
361 *pos++ = 0; /* min tx power */
362 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
364 /* 2. supported channels */
365 /* TODO: get this in reg domain format */
366 pos = skb_put(skb, 2 * sband->n_channels + 2);
367 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
368 *pos++ = 2 * sband->n_channels;
369 for (i = 0; i < sband->n_channels; i++) {
370 *pos++ = ieee80211_frequency_to_channel(
371 sband->channels[i].center_freq);
372 *pos++ = 1; /* one channel in the subband*/
376 if (ifsta->extra_ie) {
377 pos = skb_put(skb, ifsta->extra_ie_len);
378 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
381 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
382 pos = skb_put(skb, 9);
383 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
384 *pos++ = 7; /* len */
385 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
388 *pos++ = 2; /* WME */
389 *pos++ = 0; /* WME info */
390 *pos++ = 1; /* WME ver */
394 /* wmm support is a must to HT */
395 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
396 sband->ht_info.ht_supported &&
397 (ht_add_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_EXTRA_INFO))) {
398 struct ieee80211_ht_addt_info *ht_add_info =
399 (struct ieee80211_ht_addt_info *)ht_add_ie;
400 u16 cap = sband->ht_info.cap;
402 u32 flags = local->hw.conf.channel->flags;
404 switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) {
405 case IEEE80211_HT_IE_CHA_SEC_ABOVE:
406 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
407 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
408 cap &= ~IEEE80211_HT_CAP_SGI_40;
411 case IEEE80211_HT_IE_CHA_SEC_BELOW:
412 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
413 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
414 cap &= ~IEEE80211_HT_CAP_SGI_40;
419 tmp = cpu_to_le16(cap);
420 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
421 *pos++ = WLAN_EID_HT_CAPABILITY;
422 *pos++ = sizeof(struct ieee80211_ht_cap);
423 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
424 memcpy(pos, &tmp, sizeof(u16));
426 /* TODO: needs a define here for << 2 */
427 *pos++ = sband->ht_info.ampdu_factor |
428 (sband->ht_info.ampdu_density << 2);
429 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
432 kfree(ifsta->assocreq_ies);
433 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
434 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
435 if (ifsta->assocreq_ies)
436 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
438 ieee80211_tx_skb(sdata, skb, 0);
442 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
443 u16 stype, u16 reason)
445 struct ieee80211_local *local = sdata->local;
446 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
448 struct ieee80211_mgmt *mgmt;
450 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
452 printk(KERN_DEBUG "%s: failed to allocate buffer for "
453 "deauth/disassoc frame\n", sdata->dev->name);
456 skb_reserve(skb, local->hw.extra_tx_headroom);
458 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
460 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
461 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
462 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
463 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
465 /* u.deauth.reason_code == u.disassoc.reason_code */
466 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
468 ieee80211_tx_skb(sdata, skb, 0);
472 static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
473 struct ieee80211_bss *bss)
475 struct ieee80211_local *local = sdata->local;
476 int i, have_higher_than_11mbit = 0;
478 /* cf. IEEE 802.11 9.2.12 */
479 for (i = 0; i < bss->supp_rates_len; i++)
480 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
481 have_higher_than_11mbit = 1;
483 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
484 have_higher_than_11mbit)
485 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
487 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
489 ieee80211_set_wmm_default(sdata);
492 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
493 struct ieee80211_if_sta *ifsta,
494 u8 *wmm_param, size_t wmm_param_len)
496 struct ieee80211_tx_queue_params params;
501 if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
507 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
509 count = wmm_param[6] & 0x0f;
510 if (count == ifsta->wmm_last_param_set)
512 ifsta->wmm_last_param_set = count;
515 left = wmm_param_len - 8;
517 memset(¶ms, 0, sizeof(params));
519 if (!local->ops->conf_tx)
523 for (; left >= 4; left -= 4, pos += 4) {
524 int aci = (pos[0] >> 5) & 0x03;
525 int acm = (pos[0] >> 4) & 0x01;
532 local->wmm_acm |= BIT(0) | BIT(3);
537 local->wmm_acm |= BIT(4) | BIT(5);
542 local->wmm_acm |= BIT(6) | BIT(7);
548 local->wmm_acm |= BIT(1) | BIT(2);
552 params.aifs = pos[0] & 0x0f;
553 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
554 params.cw_min = ecw2cw(pos[1] & 0x0f);
555 params.txop = get_unaligned_le16(pos + 2);
556 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
557 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
558 "cWmin=%d cWmax=%d txop=%d\n",
559 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
560 params.cw_max, params.txop);
562 /* TODO: handle ACM (block TX, fallback to next lowest allowed
564 if (local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) {
565 printk(KERN_DEBUG "%s: failed to set TX queue "
566 "parameters for queue %d\n", local->mdev->name, queue);
571 static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
573 bool use_short_preamble)
575 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
576 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
577 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
578 DECLARE_MAC_BUF(mac);
582 if (use_protection != bss_conf->use_cts_prot) {
583 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
584 if (net_ratelimit()) {
585 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
588 use_protection ? "enabled" : "disabled",
589 print_mac(mac, ifsta->bssid));
592 bss_conf->use_cts_prot = use_protection;
593 changed |= BSS_CHANGED_ERP_CTS_PROT;
596 if (use_short_preamble != bss_conf->use_short_preamble) {
597 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
598 if (net_ratelimit()) {
599 printk(KERN_DEBUG "%s: switched to %s barker preamble"
602 use_short_preamble ? "short" : "long",
603 print_mac(mac, ifsta->bssid));
606 bss_conf->use_short_preamble = use_short_preamble;
607 changed |= BSS_CHANGED_ERP_PREAMBLE;
613 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
616 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
617 bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
619 return ieee80211_handle_protect_preamb(sdata,
620 use_protection, use_short_preamble);
623 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
624 struct ieee80211_bss *bss)
628 if (bss->has_erp_value)
629 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
631 u16 capab = bss->capability;
632 changed |= ieee80211_handle_protect_preamb(sdata, false,
633 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
639 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata,
640 struct ieee80211_if_sta *ifsta)
642 union iwreq_data wrqu;
643 memset(&wrqu, 0, sizeof(wrqu));
644 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
645 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
646 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
647 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
650 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata,
651 struct ieee80211_if_sta *ifsta)
656 union iwreq_data wrqu;
658 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
661 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
662 ifsta->assocresp_ies_len), GFP_KERNEL);
666 len = sprintf(buf, "ASSOCINFO(");
667 if (ifsta->assocreq_ies) {
668 len += sprintf(buf + len, "ReqIEs=");
669 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
670 len += sprintf(buf + len, "%02x",
671 ifsta->assocreq_ies[i]);
674 if (ifsta->assocresp_ies) {
675 if (ifsta->assocreq_ies)
676 len += sprintf(buf + len, " ");
677 len += sprintf(buf + len, "RespIEs=");
678 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
679 len += sprintf(buf + len, "%02x",
680 ifsta->assocresp_ies[i]);
683 len += sprintf(buf + len, ")");
685 if (len > IW_CUSTOM_MAX) {
686 len = sprintf(buf, "ASSOCRESPIE=");
687 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
688 len += sprintf(buf + len, "%02x",
689 ifsta->assocresp_ies[i]);
693 memset(&wrqu, 0, sizeof(wrqu));
694 wrqu.data.length = len;
695 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
701 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
702 struct ieee80211_if_sta *ifsta)
704 struct ieee80211_local *local = sdata->local;
705 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
706 u32 changed = BSS_CHANGED_ASSOC;
708 struct ieee80211_bss *bss;
710 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
712 if (sdata->vif.type != NL80211_IFTYPE_STATION)
715 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
716 conf->channel->center_freq,
717 ifsta->ssid, ifsta->ssid_len);
719 /* set timing information */
720 sdata->bss_conf.beacon_int = bss->beacon_int;
721 sdata->bss_conf.timestamp = bss->timestamp;
722 sdata->bss_conf.dtim_period = bss->dtim_period;
724 changed |= ieee80211_handle_bss_capability(sdata, bss);
726 ieee80211_rx_bss_put(local, bss);
729 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
730 changed |= BSS_CHANGED_HT;
731 sdata->bss_conf.assoc_ht = 1;
732 sdata->bss_conf.ht_conf = &conf->ht_conf;
733 sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
736 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
737 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
738 ieee80211_sta_send_associnfo(sdata, ifsta);
740 ifsta->last_probe = jiffies;
741 ieee80211_led_assoc(local, 1);
743 sdata->bss_conf.assoc = 1;
745 * For now just always ask the driver to update the basic rateset
746 * when we have associated, we aren't checking whether it actually
749 changed |= BSS_CHANGED_BASIC_RATES;
750 ieee80211_bss_info_change_notify(sdata, changed);
752 netif_tx_start_all_queues(sdata->dev);
753 netif_carrier_on(sdata->dev);
755 ieee80211_sta_send_apinfo(sdata, ifsta);
758 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
759 struct ieee80211_if_sta *ifsta)
761 DECLARE_MAC_BUF(mac);
763 ifsta->direct_probe_tries++;
764 if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
765 printk(KERN_DEBUG "%s: direct probe to AP %s timed out\n",
766 sdata->dev->name, print_mac(mac, ifsta->bssid));
767 ifsta->state = IEEE80211_STA_MLME_DISABLED;
771 printk(KERN_DEBUG "%s: direct probe to AP %s try %d\n",
772 sdata->dev->name, print_mac(mac, ifsta->bssid),
773 ifsta->direct_probe_tries);
775 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
777 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request);
779 /* Direct probe is sent to broadcast address as some APs
780 * will not answer to direct packet in unassociated state.
782 ieee80211_send_probe_req(sdata, NULL,
783 ifsta->ssid, ifsta->ssid_len);
785 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
789 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
790 struct ieee80211_if_sta *ifsta)
792 DECLARE_MAC_BUF(mac);
795 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
796 printk(KERN_DEBUG "%s: authentication with AP %s"
798 sdata->dev->name, print_mac(mac, ifsta->bssid));
799 ifsta->state = IEEE80211_STA_MLME_DISABLED;
803 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
804 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
805 sdata->dev->name, print_mac(mac, ifsta->bssid));
807 ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
809 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
812 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
813 struct ieee80211_if_sta *ifsta, bool deauth,
814 bool self_disconnected, u16 reason)
816 struct ieee80211_local *local = sdata->local;
817 struct sta_info *sta;
818 u32 changed = BSS_CHANGED_ASSOC;
822 sta = sta_info_get(local, ifsta->bssid);
829 ifsta->direct_probe_tries = 0;
830 ifsta->auth_tries = 0;
832 ifsta->assoc_scan_tries = 0;
833 ifsta->assoc_tries = 0;
835 netif_tx_stop_all_queues(sdata->dev);
836 netif_carrier_off(sdata->dev);
838 ieee80211_sta_tear_down_BA_sessions(sdata, sta->sta.addr);
840 if (self_disconnected) {
842 ieee80211_send_deauth_disassoc(sdata,
843 IEEE80211_STYPE_DEAUTH, reason);
845 ieee80211_send_deauth_disassoc(sdata,
846 IEEE80211_STYPE_DISASSOC, reason);
849 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
850 changed |= ieee80211_reset_erp_info(sdata);
852 if (sdata->bss_conf.assoc_ht)
853 changed |= BSS_CHANGED_HT;
855 sdata->bss_conf.assoc_ht = 0;
856 sdata->bss_conf.ht_conf = NULL;
857 sdata->bss_conf.ht_bss_conf = NULL;
859 ieee80211_led_assoc(local, 0);
860 sdata->bss_conf.assoc = 0;
862 ieee80211_sta_send_apinfo(sdata, ifsta);
864 if (self_disconnected)
865 ifsta->state = IEEE80211_STA_MLME_DISABLED;
867 sta_info_unlink(&sta);
871 sta_info_destroy(sta);
874 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
876 if (!sdata || !sdata->default_key ||
877 sdata->default_key->conf.alg != ALG_WEP)
882 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
883 struct ieee80211_if_sta *ifsta)
885 struct ieee80211_local *local = sdata->local;
886 struct ieee80211_bss *bss;
891 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
894 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
895 local->hw.conf.channel->center_freq,
896 ifsta->ssid, ifsta->ssid_len);
900 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
901 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
902 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
904 ieee80211_rx_bss_put(local, bss);
906 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
912 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
913 struct ieee80211_if_sta *ifsta)
915 DECLARE_MAC_BUF(mac);
917 ifsta->assoc_tries++;
918 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
919 printk(KERN_DEBUG "%s: association with AP %s"
921 sdata->dev->name, print_mac(mac, ifsta->bssid));
922 ifsta->state = IEEE80211_STA_MLME_DISABLED;
926 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
927 printk(KERN_DEBUG "%s: associate with AP %s\n",
928 sdata->dev->name, print_mac(mac, ifsta->bssid));
929 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
930 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
931 "mixed-cell disabled - abort association\n", sdata->dev->name);
932 ifsta->state = IEEE80211_STA_MLME_DISABLED;
936 ieee80211_send_assoc(sdata, ifsta);
938 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
942 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
943 struct ieee80211_if_sta *ifsta)
945 struct ieee80211_local *local = sdata->local;
946 struct sta_info *sta;
948 DECLARE_MAC_BUF(mac);
950 /* TODO: start monitoring current AP signal quality and number of
951 * missed beacons. Scan other channels every now and then and search
953 /* TODO: remove expired BSSes */
955 ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
959 sta = sta_info_get(local, ifsta->bssid);
961 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
962 sdata->dev->name, print_mac(mac, ifsta->bssid));
966 if (time_after(jiffies,
967 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
968 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
969 printk(KERN_DEBUG "%s: No ProbeResp from "
970 "current AP %s - assume out of "
972 sdata->dev->name, print_mac(mac, ifsta->bssid));
975 ieee80211_send_probe_req(sdata, ifsta->bssid,
978 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
980 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
981 if (time_after(jiffies, ifsta->last_probe +
982 IEEE80211_PROBE_INTERVAL)) {
983 ifsta->last_probe = jiffies;
984 ieee80211_send_probe_req(sdata, ifsta->bssid,
994 ieee80211_set_disassoc(sdata, ifsta, true, true,
995 WLAN_REASON_PREV_AUTH_NOT_VALID);
997 mod_timer(&ifsta->timer, jiffies +
998 IEEE80211_MONITORING_INTERVAL);
1002 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
1003 struct ieee80211_if_sta *ifsta)
1005 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1006 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1007 ieee80211_associate(sdata, ifsta);
1011 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1012 struct ieee80211_if_sta *ifsta,
1013 struct ieee80211_mgmt *mgmt,
1017 struct ieee802_11_elems elems;
1019 pos = mgmt->u.auth.variable;
1020 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1021 if (!elems.challenge)
1023 ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
1024 elems.challenge_len + 2, 1);
1027 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1028 struct ieee80211_if_sta *ifsta,
1029 struct ieee80211_mgmt *mgmt,
1032 u16 auth_alg, auth_transaction, status_code;
1033 DECLARE_MAC_BUF(mac);
1035 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
1036 sdata->vif.type != NL80211_IFTYPE_ADHOC)
1042 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
1043 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1046 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
1047 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1050 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1051 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1052 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1054 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
1056 * IEEE 802.11 standard does not require authentication in IBSS
1057 * networks and most implementations do not seem to use it.
1058 * However, try to reply to authentication attempts if someone
1059 * has actually implemented this.
1061 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
1063 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
1066 if (auth_alg != ifsta->auth_alg ||
1067 auth_transaction != ifsta->auth_transaction)
1070 if (status_code != WLAN_STATUS_SUCCESS) {
1071 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1073 const int num_algs = ARRAY_SIZE(algs);
1075 algs[0] = algs[1] = algs[2] = 0xff;
1076 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1077 algs[0] = WLAN_AUTH_OPEN;
1078 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1079 algs[1] = WLAN_AUTH_SHARED_KEY;
1080 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1081 algs[2] = WLAN_AUTH_LEAP;
1082 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1084 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1088 for (i = 0; i < num_algs; i++) {
1090 if (pos >= num_algs)
1092 if (algs[pos] == ifsta->auth_alg ||
1095 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1096 !ieee80211_sta_wep_configured(sdata))
1098 ifsta->auth_alg = algs[pos];
1105 switch (ifsta->auth_alg) {
1106 case WLAN_AUTH_OPEN:
1107 case WLAN_AUTH_LEAP:
1108 ieee80211_auth_completed(sdata, ifsta);
1110 case WLAN_AUTH_SHARED_KEY:
1111 if (ifsta->auth_transaction == 4)
1112 ieee80211_auth_completed(sdata, ifsta);
1114 ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
1120 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1121 struct ieee80211_if_sta *ifsta,
1122 struct ieee80211_mgmt *mgmt,
1126 DECLARE_MAC_BUF(mac);
1131 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1134 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1136 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
1137 printk(KERN_DEBUG "%s: deauthenticated\n", sdata->dev->name);
1139 if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1140 ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
1141 ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1142 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1143 mod_timer(&ifsta->timer, jiffies +
1144 IEEE80211_RETRY_AUTH_INTERVAL);
1147 ieee80211_set_disassoc(sdata, ifsta, true, false, 0);
1148 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1152 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1153 struct ieee80211_if_sta *ifsta,
1154 struct ieee80211_mgmt *mgmt,
1158 DECLARE_MAC_BUF(mac);
1163 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1166 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1168 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1169 printk(KERN_DEBUG "%s: disassociated\n", sdata->dev->name);
1171 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1172 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
1173 mod_timer(&ifsta->timer, jiffies +
1174 IEEE80211_RETRY_AUTH_INTERVAL);
1177 ieee80211_set_disassoc(sdata, ifsta, false, false, 0);
1181 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1182 struct ieee80211_if_sta *ifsta,
1183 struct ieee80211_mgmt *mgmt,
1187 struct ieee80211_local *local = sdata->local;
1188 struct ieee80211_supported_band *sband;
1189 struct sta_info *sta;
1190 u64 rates, basic_rates;
1191 u16 capab_info, status_code, aid;
1192 struct ieee802_11_elems elems;
1193 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1196 DECLARE_MAC_BUF(mac);
1197 bool have_higher_than_11mbit = false;
1199 /* AssocResp and ReassocResp have identical structure, so process both
1200 * of them in this function. */
1202 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
1208 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1211 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1212 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1213 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1215 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1216 "status=%d aid=%d)\n",
1217 sdata->dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1218 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1220 if (status_code != WLAN_STATUS_SUCCESS) {
1221 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1222 sdata->dev->name, status_code);
1223 /* if this was a reassociation, ensure we try a "full"
1224 * association next time. This works around some broken APs
1225 * which do not correctly reject reassociation requests. */
1226 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1230 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1231 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1232 "set\n", sdata->dev->name, aid);
1233 aid &= ~(BIT(15) | BIT(14));
1235 pos = mgmt->u.assoc_resp.variable;
1236 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1238 if (!elems.supp_rates) {
1239 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1244 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1246 ifsta->ap_capab = capab_info;
1248 kfree(ifsta->assocresp_ies);
1249 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1250 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1251 if (ifsta->assocresp_ies)
1252 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1256 /* Add STA entry for the AP */
1257 sta = sta_info_get(local, ifsta->bssid);
1259 struct ieee80211_bss *bss;
1262 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1264 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1265 " the AP\n", sdata->dev->name);
1269 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
1270 local->hw.conf.channel->center_freq,
1271 ifsta->ssid, ifsta->ssid_len);
1273 sta->last_signal = bss->signal;
1274 sta->last_qual = bss->qual;
1275 sta->last_noise = bss->noise;
1276 ieee80211_rx_bss_put(local, bss);
1279 err = sta_info_insert(sta);
1281 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1282 " the AP (error %d)\n", sdata->dev->name, err);
1286 /* update new sta with its last rx activity */
1287 sta->last_rx = jiffies;
1291 * FIXME: Do we really need to update the sta_info's information here?
1292 * We already know about the AP (we found it in our list) so it
1293 * should already be filled with the right info, no?
1294 * As is stands, all this is racy because typically we assume
1295 * the information that is filled in here (except flags) doesn't
1296 * change while a STA structure is alive. As such, it should move
1297 * to between the sta_info_alloc() and sta_info_insert() above.
1300 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1301 WLAN_STA_AUTHORIZED);
1305 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1307 for (i = 0; i < elems.supp_rates_len; i++) {
1308 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1311 have_higher_than_11mbit = true;
1313 for (j = 0; j < sband->n_bitrates; j++) {
1314 if (sband->bitrates[j].bitrate == rate)
1316 if (elems.supp_rates[i] & 0x80)
1317 basic_rates |= BIT(j);
1321 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1322 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1325 have_higher_than_11mbit = true;
1327 for (j = 0; j < sband->n_bitrates; j++) {
1328 if (sband->bitrates[j].bitrate == rate)
1330 if (elems.ext_supp_rates[i] & 0x80)
1331 basic_rates |= BIT(j);
1335 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1336 sdata->bss_conf.basic_rates = basic_rates;
1338 /* cf. IEEE 802.11 9.2.12 */
1339 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1340 have_higher_than_11mbit)
1341 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1343 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1345 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1346 (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
1347 struct ieee80211_ht_bss_info bss_info;
1348 ieee80211_ht_cap_ie_to_ht_info(
1349 (struct ieee80211_ht_cap *)
1350 elems.ht_cap_elem, &sta->sta.ht_info);
1351 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1352 (struct ieee80211_ht_addt_info *)
1353 elems.ht_info_elem, &bss_info);
1354 ieee80211_handle_ht(local, 1, &sta->sta.ht_info, &bss_info);
1357 rate_control_rate_init(sta);
1359 if (elems.wmm_param) {
1360 set_sta_flags(sta, WLAN_STA_WME);
1362 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1363 elems.wmm_param_len);
1367 /* set AID and assoc capability,
1368 * ieee80211_set_associated() will tell the driver */
1369 bss_conf->aid = aid;
1370 bss_conf->assoc_capability = capab_info;
1371 ieee80211_set_associated(sdata, ifsta);
1373 ieee80211_associated(sdata, ifsta);
1377 static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
1378 struct ieee80211_if_sta *ifsta,
1379 struct ieee80211_bss *bss)
1381 struct ieee80211_local *local = sdata->local;
1382 int res, rates, i, j;
1383 struct sk_buff *skb;
1384 struct ieee80211_mgmt *mgmt;
1386 struct ieee80211_supported_band *sband;
1387 union iwreq_data wrqu;
1389 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1391 /* Remove possible STA entries from other IBSS networks. */
1392 sta_info_flush_delayed(sdata);
1394 if (local->ops->reset_tsf) {
1395 /* Reset own TSF to allow time synchronization work. */
1396 local->ops->reset_tsf(local_to_hw(local));
1398 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
1399 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
1403 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
1405 sdata->drop_unencrypted = bss->capability &
1406 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
1408 res = ieee80211_set_freq(sdata, bss->freq);
1413 /* Build IBSS probe response */
1414 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
1416 skb_reserve(skb, local->hw.extra_tx_headroom);
1418 mgmt = (struct ieee80211_mgmt *)
1419 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
1420 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
1421 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1422 IEEE80211_STYPE_PROBE_RESP);
1423 memset(mgmt->da, 0xff, ETH_ALEN);
1424 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1425 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1426 mgmt->u.beacon.beacon_int =
1427 cpu_to_le16(local->hw.conf.beacon_int);
1428 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
1429 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
1431 pos = skb_put(skb, 2 + ifsta->ssid_len);
1432 *pos++ = WLAN_EID_SSID;
1433 *pos++ = ifsta->ssid_len;
1434 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
1436 rates = bss->supp_rates_len;
1439 pos = skb_put(skb, 2 + rates);
1440 *pos++ = WLAN_EID_SUPP_RATES;
1442 memcpy(pos, bss->supp_rates, rates);
1444 if (bss->band == IEEE80211_BAND_2GHZ) {
1445 pos = skb_put(skb, 2 + 1);
1446 *pos++ = WLAN_EID_DS_PARAMS;
1448 *pos++ = ieee80211_frequency_to_channel(bss->freq);
1451 pos = skb_put(skb, 2 + 2);
1452 *pos++ = WLAN_EID_IBSS_PARAMS;
1454 /* FIX: set ATIM window based on scan results */
1458 if (bss->supp_rates_len > 8) {
1459 rates = bss->supp_rates_len - 8;
1460 pos = skb_put(skb, 2 + rates);
1461 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1463 memcpy(pos, &bss->supp_rates[8], rates);
1466 ifsta->probe_resp = skb;
1468 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
1472 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1473 for (i = 0; i < bss->supp_rates_len; i++) {
1474 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
1475 for (j = 0; j < sband->n_bitrates; j++)
1476 if (sband->bitrates[j].bitrate == bitrate)
1479 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
1481 ieee80211_sta_def_wmm_params(sdata, bss);
1483 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
1484 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1486 ieee80211_led_assoc(local, true);
1488 memset(&wrqu, 0, sizeof(wrqu));
1489 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
1490 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
1495 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1496 struct ieee80211_mgmt *mgmt,
1498 struct ieee80211_rx_status *rx_status,
1499 struct ieee802_11_elems *elems,
1502 struct ieee80211_local *local = sdata->local;
1504 struct ieee80211_bss *bss;
1505 struct sta_info *sta;
1506 struct ieee80211_channel *channel;
1507 u64 beacon_timestamp, rx_timestamp;
1509 enum ieee80211_band band = rx_status->band;
1510 DECLARE_MAC_BUF(mac);
1511 DECLARE_MAC_BUF(mac2);
1513 if (elems->ds_params && elems->ds_params_len == 1)
1514 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1516 freq = rx_status->freq;
1518 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1520 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1523 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && elems->supp_rates &&
1524 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1525 supp_rates = ieee80211_sta_get_rates(local, elems, band);
1529 sta = sta_info_get(local, mgmt->sa);
1533 prev_rates = sta->sta.supp_rates[band];
1534 /* make sure mandatory rates are always added */
1535 sta->sta.supp_rates[band] = supp_rates |
1536 ieee80211_mandatory_rates(local, band);
1538 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1539 if (sta->sta.supp_rates[band] != prev_rates)
1540 printk(KERN_DEBUG "%s: updated supp_rates set "
1541 "for %s based on beacon info (0x%llx | "
1542 "0x%llx -> 0x%llx)\n",
1544 print_mac(mac, sta->sta.addr),
1545 (unsigned long long) prev_rates,
1546 (unsigned long long) supp_rates,
1547 (unsigned long long) sta->sta.supp_rates[band]);
1550 ieee80211_ibss_add_sta(sdata, NULL, mgmt->bssid,
1551 mgmt->sa, supp_rates);
1557 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1562 /* was just updated in ieee80211_bss_info_update */
1563 beacon_timestamp = bss->timestamp;
1566 * In STA mode, the remaining parameters should not be overridden
1567 * by beacons because they're not necessarily accurate there.
1569 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
1570 bss->last_probe_resp && beacon) {
1571 ieee80211_rx_bss_put(local, bss);
1575 /* check if we need to merge IBSS */
1576 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && beacon &&
1577 bss->capability & WLAN_CAPABILITY_IBSS &&
1578 bss->freq == local->oper_channel->center_freq &&
1579 elems->ssid_len == sdata->u.sta.ssid_len &&
1580 memcmp(elems->ssid, sdata->u.sta.ssid,
1581 sdata->u.sta.ssid_len) == 0) {
1582 if (rx_status->flag & RX_FLAG_TSFT) {
1583 /* in order for correct IBSS merging we need mactime
1585 * since mactime is defined as the time the first data
1586 * symbol of the frame hits the PHY, and the timestamp
1587 * of the beacon is defined as "the time that the data
1588 * symbol containing the first bit of the timestamp is
1589 * transmitted to the PHY plus the transmitting STA’s
1590 * delays through its local PHY from the MAC-PHY
1591 * interface to its interface with the WM"
1592 * (802.11 11.1.2) - equals the time this bit arrives at
1593 * the receiver - we have to take into account the
1594 * offset between the two.
1595 * e.g: at 1 MBit that means mactime is 192 usec earlier
1596 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
1598 int rate = local->hw.wiphy->bands[band]->
1599 bitrates[rx_status->rate_idx].bitrate;
1600 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
1601 } else if (local && local->ops && local->ops->get_tsf)
1602 /* second best option: get current TSF */
1603 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
1605 /* can't merge without knowing the TSF */
1606 rx_timestamp = -1LLU;
1607 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1608 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
1609 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
1610 print_mac(mac, mgmt->sa),
1611 print_mac(mac2, mgmt->bssid),
1612 (unsigned long long)rx_timestamp,
1613 (unsigned long long)beacon_timestamp,
1614 (unsigned long long)(rx_timestamp - beacon_timestamp),
1616 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1617 if (beacon_timestamp > rx_timestamp) {
1618 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1619 printk(KERN_DEBUG "%s: beacon TSF higher than "
1620 "local TSF - IBSS merge with BSSID %s\n",
1621 sdata->dev->name, print_mac(mac, mgmt->bssid));
1623 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
1624 ieee80211_ibss_add_sta(sdata, NULL,
1625 mgmt->bssid, mgmt->sa,
1630 ieee80211_rx_bss_put(local, bss);
1634 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1635 struct ieee80211_mgmt *mgmt,
1637 struct ieee80211_rx_status *rx_status)
1640 struct ieee802_11_elems elems;
1641 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1643 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1644 return; /* ignore ProbeResp to foreign address */
1646 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1650 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1653 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1655 /* direct probe may be part of the association flow */
1656 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1658 printk(KERN_DEBUG "%s direct probe responded\n",
1660 ieee80211_authenticate(sdata, ifsta);
1665 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1666 struct ieee80211_mgmt *mgmt,
1668 struct ieee80211_rx_status *rx_status)
1670 struct ieee80211_if_sta *ifsta;
1672 struct ieee802_11_elems elems;
1673 struct ieee80211_local *local = sdata->local;
1674 struct ieee80211_conf *conf = &local->hw.conf;
1677 /* Process beacon from the current BSS */
1678 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1682 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1684 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
1686 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1688 ifsta = &sdata->u.sta;
1690 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
1691 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1694 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1695 elems.wmm_param_len);
1697 if (elems.erp_info && elems.erp_info_len >= 1)
1698 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
1700 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
1701 changed |= ieee80211_handle_protect_preamb(sdata, false,
1702 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
1705 if (elems.ht_cap_elem && elems.ht_info_elem &&
1706 elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
1707 struct ieee80211_ht_bss_info bss_info;
1709 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1710 (struct ieee80211_ht_addt_info *)
1711 elems.ht_info_elem, &bss_info);
1712 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
1716 ieee80211_bss_info_change_notify(sdata, changed);
1720 static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
1721 struct ieee80211_if_sta *ifsta,
1722 struct ieee80211_mgmt *mgmt,
1724 struct ieee80211_rx_status *rx_status)
1726 struct ieee80211_local *local = sdata->local;
1728 struct sk_buff *skb;
1729 struct ieee80211_mgmt *resp;
1731 DECLARE_MAC_BUF(mac);
1732 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1733 DECLARE_MAC_BUF(mac2);
1734 DECLARE_MAC_BUF(mac3);
1737 if (sdata->vif.type != NL80211_IFTYPE_ADHOC ||
1738 ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
1739 len < 24 + 2 || !ifsta->probe_resp)
1742 if (local->ops->tx_last_beacon)
1743 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1747 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1748 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
1749 "%s (tx_last_beacon=%d)\n",
1750 sdata->dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
1751 print_mac(mac3, mgmt->bssid), tx_last_beacon);
1752 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1754 if (!tx_last_beacon)
1757 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1758 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1761 end = ((u8 *) mgmt) + len;
1762 pos = mgmt->u.probe_req.variable;
1763 if (pos[0] != WLAN_EID_SSID ||
1764 pos + 2 + pos[1] > end) {
1765 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1766 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
1768 sdata->dev->name, print_mac(mac, mgmt->sa));
1773 (pos[1] != ifsta->ssid_len ||
1774 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1775 /* Ignore ProbeReq for foreign SSID */
1779 /* Reply with ProbeResp */
1780 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
1784 resp = (struct ieee80211_mgmt *) skb->data;
1785 memcpy(resp->da, mgmt->sa, ETH_ALEN);
1786 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1787 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
1788 sdata->dev->name, print_mac(mac, resp->da));
1789 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1790 ieee80211_tx_skb(sdata, skb, 0);
1793 void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
1794 struct ieee80211_rx_status *rx_status)
1796 struct ieee80211_local *local = sdata->local;
1797 struct ieee80211_if_sta *ifsta;
1798 struct ieee80211_mgmt *mgmt;
1804 ifsta = &sdata->u.sta;
1806 mgmt = (struct ieee80211_mgmt *) skb->data;
1807 fc = le16_to_cpu(mgmt->frame_control);
1809 switch (fc & IEEE80211_FCTL_STYPE) {
1810 case IEEE80211_STYPE_PROBE_REQ:
1811 case IEEE80211_STYPE_PROBE_RESP:
1812 case IEEE80211_STYPE_BEACON:
1813 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1814 case IEEE80211_STYPE_AUTH:
1815 case IEEE80211_STYPE_ASSOC_RESP:
1816 case IEEE80211_STYPE_REASSOC_RESP:
1817 case IEEE80211_STYPE_DEAUTH:
1818 case IEEE80211_STYPE_DISASSOC:
1819 skb_queue_tail(&ifsta->skb_queue, skb);
1820 queue_work(local->hw.workqueue, &ifsta->work);
1828 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1829 struct sk_buff *skb)
1831 struct ieee80211_rx_status *rx_status;
1832 struct ieee80211_if_sta *ifsta;
1833 struct ieee80211_mgmt *mgmt;
1836 ifsta = &sdata->u.sta;
1838 rx_status = (struct ieee80211_rx_status *) skb->cb;
1839 mgmt = (struct ieee80211_mgmt *) skb->data;
1840 fc = le16_to_cpu(mgmt->frame_control);
1842 switch (fc & IEEE80211_FCTL_STYPE) {
1843 case IEEE80211_STYPE_PROBE_REQ:
1844 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len,
1847 case IEEE80211_STYPE_PROBE_RESP:
1848 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
1850 case IEEE80211_STYPE_BEACON:
1851 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
1853 case IEEE80211_STYPE_AUTH:
1854 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
1856 case IEEE80211_STYPE_ASSOC_RESP:
1857 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
1859 case IEEE80211_STYPE_REASSOC_RESP:
1860 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
1862 case IEEE80211_STYPE_DEAUTH:
1863 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
1865 case IEEE80211_STYPE_DISASSOC:
1866 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
1874 static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
1876 struct ieee80211_local *local = sdata->local;
1878 struct sta_info *sta;
1882 list_for_each_entry_rcu(sta, &local->sta_list, list) {
1883 if (sta->sdata == sdata &&
1884 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
1897 static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
1898 struct ieee80211_if_sta *ifsta)
1900 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1902 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
1903 if (ieee80211_sta_active_ibss(sdata))
1906 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
1907 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
1908 ieee80211_request_scan(sdata, ifsta->ssid, ifsta->ssid_len);
1912 static void ieee80211_sta_timer(unsigned long data)
1914 struct ieee80211_sub_if_data *sdata =
1915 (struct ieee80211_sub_if_data *) data;
1916 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1917 struct ieee80211_local *local = sdata->local;
1919 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1920 queue_work(local->hw.workqueue, &ifsta->work);
1923 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
1924 struct ieee80211_if_sta *ifsta)
1926 struct ieee80211_local *local = sdata->local;
1928 if (local->ops->reset_tsf) {
1929 /* Reset own TSF to allow time synchronization work. */
1930 local->ops->reset_tsf(local_to_hw(local));
1933 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
1936 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1937 ifsta->auth_alg = WLAN_AUTH_OPEN;
1938 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1939 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
1940 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1941 ifsta->auth_alg = WLAN_AUTH_LEAP;
1943 ifsta->auth_alg = WLAN_AUTH_OPEN;
1944 ifsta->auth_transaction = -1;
1945 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
1946 ifsta->assoc_scan_tries = 0;
1947 ifsta->direct_probe_tries = 0;
1948 ifsta->auth_tries = 0;
1949 ifsta->assoc_tries = 0;
1950 netif_tx_stop_all_queues(sdata->dev);
1951 netif_carrier_off(sdata->dev);
1955 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
1956 const char *ssid, int ssid_len)
1958 int tmp, hidden_ssid;
1960 if (ssid_len == ifsta->ssid_len &&
1961 !memcmp(ifsta->ssid, ssid, ssid_len))
1964 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
1970 if (ssid[tmp] != '\0') {
1976 if (hidden_ssid && ifsta->ssid_len == ssid_len)
1979 if (ssid_len == 1 && ssid[0] == ' ')
1985 static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
1986 struct ieee80211_if_sta *ifsta)
1988 struct ieee80211_local *local = sdata->local;
1989 struct ieee80211_bss *bss;
1990 struct ieee80211_supported_band *sband;
1991 u8 bssid[ETH_ALEN], *pos;
1994 DECLARE_MAC_BUF(mac);
1997 /* Easier testing, use fixed BSSID. */
1998 memset(bssid, 0xfe, ETH_ALEN);
2000 /* Generate random, not broadcast, locally administered BSSID. Mix in
2001 * own MAC address to make sure that devices that do not have proper
2002 * random number generator get different BSSID. */
2003 get_random_bytes(bssid, ETH_ALEN);
2004 for (i = 0; i < ETH_ALEN; i++)
2005 bssid[i] ^= sdata->dev->dev_addr[i];
2010 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
2011 sdata->dev->name, print_mac(mac, bssid));
2013 bss = ieee80211_rx_bss_add(local, bssid,
2014 local->hw.conf.channel->center_freq,
2015 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
2019 bss->band = local->hw.conf.channel->band;
2020 sband = local->hw.wiphy->bands[bss->band];
2022 if (local->hw.conf.beacon_int == 0)
2023 local->hw.conf.beacon_int = 100;
2024 bss->beacon_int = local->hw.conf.beacon_int;
2025 bss->last_update = jiffies;
2026 bss->capability = WLAN_CAPABILITY_IBSS;
2028 if (sdata->default_key)
2029 bss->capability |= WLAN_CAPABILITY_PRIVACY;
2031 sdata->drop_unencrypted = 0;
2033 bss->supp_rates_len = sband->n_bitrates;
2034 pos = bss->supp_rates;
2035 for (i = 0; i < sband->n_bitrates; i++) {
2036 int rate = sband->bitrates[i].bitrate;
2037 *pos++ = (u8) (rate / 5);
2040 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
2041 ieee80211_rx_bss_put(local, bss);
2046 static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
2047 struct ieee80211_if_sta *ifsta)
2049 struct ieee80211_local *local = sdata->local;
2050 struct ieee80211_bss *bss;
2054 DECLARE_MAC_BUF(mac);
2055 DECLARE_MAC_BUF(mac2);
2057 if (ifsta->ssid_len == 0)
2060 active_ibss = ieee80211_sta_active_ibss(sdata);
2061 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2062 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2063 sdata->dev->name, active_ibss);
2064 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2065 spin_lock_bh(&local->bss_lock);
2066 list_for_each_entry(bss, &local->bss_list, list) {
2067 if (ifsta->ssid_len != bss->ssid_len ||
2068 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2069 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2071 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2072 printk(KERN_DEBUG " bssid=%s found\n",
2073 print_mac(mac, bss->bssid));
2074 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2075 memcpy(bssid, bss->bssid, ETH_ALEN);
2077 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2080 spin_unlock_bh(&local->bss_lock);
2082 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2084 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
2085 "%s\n", print_mac(mac, bssid),
2086 print_mac(mac2, ifsta->bssid));
2087 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2089 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2093 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2094 search_freq = bss->freq;
2096 search_freq = local->hw.conf.channel->center_freq;
2098 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
2099 ifsta->ssid, ifsta->ssid_len);
2103 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
2104 " based on configured SSID\n",
2105 sdata->dev->name, print_mac(mac, bssid));
2106 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
2107 ieee80211_rx_bss_put(local, bss);
2112 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2113 printk(KERN_DEBUG " did not try to join ibss\n");
2114 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2116 /* Selected IBSS not found in current scan results - try to scan */
2117 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
2118 !ieee80211_sta_active_ibss(sdata)) {
2119 mod_timer(&ifsta->timer, jiffies +
2120 IEEE80211_IBSS_MERGE_INTERVAL);
2121 } else if (time_after(jiffies, local->last_scan_completed +
2122 IEEE80211_SCAN_INTERVAL)) {
2123 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
2124 "join\n", sdata->dev->name);
2125 return ieee80211_request_scan(sdata, ifsta->ssid,
2127 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
2128 int interval = IEEE80211_SCAN_INTERVAL;
2130 if (time_after(jiffies, ifsta->ibss_join_req +
2131 IEEE80211_IBSS_JOIN_TIMEOUT)) {
2132 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
2133 (!(local->oper_channel->flags &
2134 IEEE80211_CHAN_NO_IBSS)))
2135 return ieee80211_sta_create_ibss(sdata, ifsta);
2136 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
2137 printk(KERN_DEBUG "%s: IBSS not allowed on"
2138 " %d MHz\n", sdata->dev->name,
2139 local->hw.conf.channel->center_freq);
2142 /* No IBSS found - decrease scan interval and continue
2144 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2147 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2148 mod_timer(&ifsta->timer, jiffies + interval);
2156 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
2157 struct ieee80211_if_sta *ifsta)
2159 struct ieee80211_local *local = sdata->local;
2160 struct ieee80211_bss *bss, *selected = NULL;
2161 int top_rssi = 0, freq;
2163 spin_lock_bh(&local->bss_lock);
2164 freq = local->oper_channel->center_freq;
2165 list_for_each_entry(bss, &local->bss_list, list) {
2166 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2169 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2170 IEEE80211_STA_AUTO_BSSID_SEL |
2171 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
2172 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2173 !!sdata->default_key))
2176 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2180 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2181 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2184 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2185 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2188 if (!selected || top_rssi < bss->signal) {
2190 top_rssi = bss->signal;
2194 atomic_inc(&selected->users);
2195 spin_unlock_bh(&local->bss_lock);
2198 ieee80211_set_freq(sdata, selected->freq);
2199 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2200 ieee80211_sta_set_ssid(sdata, selected->ssid,
2201 selected->ssid_len);
2202 ieee80211_sta_set_bssid(sdata, selected->bssid);
2203 ieee80211_sta_def_wmm_params(sdata, selected);
2205 /* Send out direct probe if no probe resp was received or
2206 * the one we have is outdated
2208 if (!selected->last_probe_resp ||
2209 time_after(jiffies, selected->last_probe_resp
2210 + IEEE80211_SCAN_RESULT_EXPIRE))
2211 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2213 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2215 ieee80211_rx_bss_put(local, selected);
2216 ieee80211_sta_reset_auth(sdata, ifsta);
2219 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2220 ifsta->assoc_scan_tries++;
2221 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
2222 ieee80211_start_scan(sdata, NULL, 0);
2224 ieee80211_start_scan(sdata, ifsta->ssid,
2226 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2227 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2229 ifsta->state = IEEE80211_STA_MLME_DISABLED;
2235 static void ieee80211_sta_work(struct work_struct *work)
2237 struct ieee80211_sub_if_data *sdata =
2238 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2239 struct ieee80211_local *local = sdata->local;
2240 struct ieee80211_if_sta *ifsta;
2241 struct sk_buff *skb;
2243 if (!netif_running(sdata->dev))
2246 if (local->sw_scanning || local->hw_scanning)
2249 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION &&
2250 sdata->vif.type != NL80211_IFTYPE_ADHOC))
2252 ifsta = &sdata->u.sta;
2254 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2255 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2257 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2258 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2259 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
2260 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
2261 ieee80211_start_scan(sdata, ifsta->scan_ssid,
2262 ifsta->scan_ssid_len);
2266 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2267 if (ieee80211_sta_config_auth(sdata, ifsta))
2269 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2270 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2273 switch (ifsta->state) {
2274 case IEEE80211_STA_MLME_DISABLED:
2276 case IEEE80211_STA_MLME_DIRECT_PROBE:
2277 ieee80211_direct_probe(sdata, ifsta);
2279 case IEEE80211_STA_MLME_AUTHENTICATE:
2280 ieee80211_authenticate(sdata, ifsta);
2282 case IEEE80211_STA_MLME_ASSOCIATE:
2283 ieee80211_associate(sdata, ifsta);
2285 case IEEE80211_STA_MLME_ASSOCIATED:
2286 ieee80211_associated(sdata, ifsta);
2288 case IEEE80211_STA_MLME_IBSS_SEARCH:
2289 ieee80211_sta_find_ibss(sdata, ifsta);
2291 case IEEE80211_STA_MLME_IBSS_JOINED:
2292 ieee80211_sta_merge_ibss(sdata, ifsta);
2299 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
2300 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2301 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2303 ieee80211_set_disassoc(sdata, ifsta, false, true,
2304 WLAN_REASON_UNSPECIFIED);
2308 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2310 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2311 queue_work(sdata->local->hw.workqueue,
2312 &sdata->u.sta.work);
2315 /* interface setup */
2316 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2318 struct ieee80211_if_sta *ifsta;
2320 ifsta = &sdata->u.sta;
2321 INIT_WORK(&ifsta->work, ieee80211_sta_work);
2322 setup_timer(&ifsta->timer, ieee80211_sta_timer,
2323 (unsigned long) sdata);
2324 skb_queue_head_init(&ifsta->skb_queue);
2326 ifsta->capab = WLAN_CAPABILITY_ESS;
2327 ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2328 IEEE80211_AUTH_ALG_SHARED_KEY;
2329 ifsta->flags |= IEEE80211_STA_CREATE_IBSS |
2330 IEEE80211_STA_AUTO_BSSID_SEL |
2331 IEEE80211_STA_AUTO_CHANNEL_SEL;
2332 if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4)
2333 ifsta->flags |= IEEE80211_STA_WMM_ENABLED;
2337 * Add a new IBSS station, will also be called by the RX code when,
2338 * in IBSS mode, receiving a frame from a yet-unknown station, hence
2339 * must be callable in atomic context.
2341 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
2342 struct sk_buff *skb, u8 *bssid,
2343 u8 *addr, u64 supp_rates)
2345 struct ieee80211_local *local = sdata->local;
2346 struct sta_info *sta;
2347 DECLARE_MAC_BUF(mac);
2348 int band = local->hw.conf.channel->band;
2350 /* TODO: Could consider removing the least recently used entry and
2351 * allow new one to be added. */
2352 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
2353 if (net_ratelimit()) {
2354 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
2355 "entry %s\n", sdata->dev->name, print_mac(mac, addr));
2360 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
2363 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2364 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
2365 wiphy_name(local->hw.wiphy), print_mac(mac, addr), sdata->dev->name);
2368 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
2372 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
2374 /* make sure mandatory rates are always added */
2375 sta->sta.supp_rates[band] = supp_rates |
2376 ieee80211_mandatory_rates(local, band);
2378 rate_control_rate_init(sta);
2380 if (sta_info_insert(sta))
2386 /* configuration hooks */
2387 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
2388 struct ieee80211_if_sta *ifsta)
2390 struct ieee80211_local *local = sdata->local;
2392 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2395 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2396 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2397 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2398 IEEE80211_STA_AUTO_SSID_SEL))) {
2400 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED)
2401 ieee80211_set_disassoc(sdata, ifsta, true, true,
2402 WLAN_REASON_DEAUTH_LEAVING);
2404 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2405 queue_work(local->hw.workqueue, &ifsta->work);
2409 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2411 struct ieee80211_if_sta *ifsta;
2414 if (len > IEEE80211_MAX_SSID_LEN)
2417 ifsta = &sdata->u.sta;
2419 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
2420 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
2421 memcpy(ifsta->ssid, ssid, len);
2422 ifsta->ssid_len = len;
2423 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2427 * Hack! MLME code needs to be cleaned up to have different
2428 * entry points for configuration and internal selection change
2430 if (netif_running(sdata->dev))
2431 res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID);
2433 printk(KERN_DEBUG "%s: Failed to config new SSID to "
2434 "the low-level driver\n", sdata->dev->name);
2440 ifsta->flags |= IEEE80211_STA_SSID_SET;
2442 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
2444 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
2445 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
2446 ifsta->ibss_join_req = jiffies;
2447 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2448 return ieee80211_sta_find_ibss(sdata, ifsta);
2454 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2456 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2457 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2458 *len = ifsta->ssid_len;
2462 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2464 struct ieee80211_if_sta *ifsta;
2467 ifsta = &sdata->u.sta;
2469 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2470 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2473 * Hack! See also ieee80211_sta_set_ssid.
2475 if (netif_running(sdata->dev))
2476 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
2478 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2479 "the low-level driver\n", sdata->dev->name);
2484 if (is_valid_ether_addr(bssid))
2485 ifsta->flags |= IEEE80211_STA_BSSID_SET;
2487 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
2492 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
2494 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2496 kfree(ifsta->extra_ie);
2498 ifsta->extra_ie = NULL;
2499 ifsta->extra_ie_len = 0;
2502 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
2503 if (!ifsta->extra_ie) {
2504 ifsta->extra_ie_len = 0;
2507 memcpy(ifsta->extra_ie, ie, len);
2508 ifsta->extra_ie_len = len;
2512 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2514 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2516 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2517 sdata->dev->name, reason);
2519 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
2520 sdata->vif.type != NL80211_IFTYPE_ADHOC)
2523 ieee80211_set_disassoc(sdata, ifsta, true, true, reason);
2527 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2529 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2531 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2532 sdata->dev->name, reason);
2534 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2537 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
2540 ieee80211_set_disassoc(sdata, ifsta, false, true, reason);
2544 /* scan finished notification */
2545 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2547 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2548 struct ieee80211_if_sta *ifsta;
2550 if (sdata && sdata->vif.type == NL80211_IFTYPE_ADHOC) {
2551 ifsta = &sdata->u.sta;
2552 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
2553 (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) &&
2554 !ieee80211_sta_active_ibss(sdata)))
2555 ieee80211_sta_find_ibss(sdata, ifsta);
2558 /* Restart STA timers */
2560 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2561 ieee80211_restart_sta_timer(sdata);
2565 /* driver notification call */
2566 void ieee80211_notify_mac(struct ieee80211_hw *hw,
2567 enum ieee80211_notification_types notif_type)
2569 struct ieee80211_local *local = hw_to_local(hw);
2570 struct ieee80211_sub_if_data *sdata;
2572 switch (notif_type) {
2573 case IEEE80211_NOTIFY_RE_ASSOC:
2575 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
2576 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2579 ieee80211_sta_req_auth(sdata, &sdata->u.sta);
2585 EXPORT_SYMBOL(ieee80211_notify_mac);