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Commit | Line | Data |
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f0706e82 JB |
1 | /* |
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> | |
8 | * | |
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. | |
12 | */ | |
13 | ||
5b323edb | 14 | #include <linux/delay.h> |
f0706e82 JB |
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> | |
d0709a65 | 22 | #include <linux/rtnetlink.h> |
f0706e82 | 23 | #include <net/iw_handler.h> |
f0706e82 | 24 | #include <net/mac80211.h> |
60f8b39c | 25 | |
f0706e82 | 26 | #include "ieee80211_i.h" |
2c8dccc7 JB |
27 | #include "rate.h" |
28 | #include "led.h" | |
f709fc69 | 29 | #include "mesh.h" |
f0706e82 | 30 | |
6042a3e3 | 31 | #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2 |
f0706e82 JB |
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) | |
f709fc69 | 37 | #define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ) |
f0706e82 JB |
38 | #define IEEE80211_PROBE_INTERVAL (60 * HZ) |
39 | #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ) | |
40 | #define IEEE80211_SCAN_INTERVAL (2 * HZ) | |
41 | #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ) | |
872ba533 | 42 | #define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ) |
f0706e82 | 43 | |
f0706e82 JB |
44 | #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ) |
45 | #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ) | |
f709fc69 | 46 | #define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ) |
f0706e82 JB |
47 | |
48 | #define IEEE80211_IBSS_MAX_STA_ENTRIES 128 | |
49 | ||
50 | ||
5484e237 JB |
51 | /* utils */ |
52 | static int ecw2cw(int ecw) | |
60f8b39c | 53 | { |
5484e237 | 54 | return (1 << ecw) - 1; |
60f8b39c JB |
55 | } |
56 | ||
57 | static u8 *ieee80211_bss_get_ie(struct ieee80211_sta_bss *bss, u8 ie) | |
43ac2ca3 JM |
58 | { |
59 | u8 *end, *pos; | |
60 | ||
61 | pos = bss->ies; | |
62 | if (pos == NULL) | |
63 | return NULL; | |
64 | end = pos + bss->ies_len; | |
65 | ||
66 | while (pos + 1 < end) { | |
67 | if (pos + 2 + pos[1] > end) | |
68 | break; | |
69 | if (pos[0] == ie) | |
70 | return pos; | |
71 | pos += 2 + pos[1]; | |
72 | } | |
73 | ||
74 | return NULL; | |
75 | } | |
76 | ||
60f8b39c JB |
77 | /* frame sending functions */ |
78 | void ieee80211_sta_tx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, | |
79 | int encrypt) | |
80 | { | |
81 | skb->dev = sdata->local->mdev; | |
82 | skb_set_mac_header(skb, 0); | |
83 | skb_set_network_header(skb, 0); | |
84 | skb_set_transport_header(skb, 0); | |
e2839d8f | 85 | |
60f8b39c JB |
86 | skb->iif = sdata->dev->ifindex; |
87 | skb->do_not_encrypt = !encrypt; | |
88 | ||
89 | dev_queue_xmit(skb); | |
90 | } | |
91 | ||
92 | static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, | |
93 | struct ieee80211_if_sta *ifsta, | |
94 | int transaction, u8 *extra, size_t extra_len, | |
95 | int encrypt) | |
96 | { | |
97 | struct ieee80211_local *local = sdata->local; | |
98 | struct sk_buff *skb; | |
99 | struct ieee80211_mgmt *mgmt; | |
100 | ||
101 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
102 | sizeof(*mgmt) + 6 + extra_len); | |
103 | if (!skb) { | |
104 | printk(KERN_DEBUG "%s: failed to allocate buffer for auth " | |
105 | "frame\n", sdata->dev->name); | |
106 | return; | |
107 | } | |
108 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
109 | ||
110 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); | |
111 | memset(mgmt, 0, 24 + 6); | |
112 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
113 | IEEE80211_STYPE_AUTH); | |
114 | if (encrypt) | |
115 | mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
116 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
117 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); | |
118 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
119 | mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg); | |
120 | mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); | |
121 | ifsta->auth_transaction = transaction + 1; | |
122 | mgmt->u.auth.status_code = cpu_to_le16(0); | |
123 | if (extra) | |
124 | memcpy(skb_put(skb, extra_len), extra, extra_len); | |
125 | ||
126 | ieee80211_sta_tx(sdata, skb, encrypt); | |
127 | } | |
128 | ||
0a51b27e JB |
129 | void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst, |
130 | u8 *ssid, size_t ssid_len) | |
60f8b39c JB |
131 | { |
132 | struct ieee80211_local *local = sdata->local; | |
133 | struct ieee80211_supported_band *sband; | |
134 | struct sk_buff *skb; | |
135 | struct ieee80211_mgmt *mgmt; | |
136 | u8 *pos, *supp_rates, *esupp_rates = NULL; | |
137 | int i; | |
138 | ||
139 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200); | |
140 | if (!skb) { | |
141 | printk(KERN_DEBUG "%s: failed to allocate buffer for probe " | |
142 | "request\n", sdata->dev->name); | |
143 | return; | |
144 | } | |
145 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
146 | ||
147 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
148 | memset(mgmt, 0, 24); | |
149 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
150 | IEEE80211_STYPE_PROBE_REQ); | |
151 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); | |
152 | if (dst) { | |
153 | memcpy(mgmt->da, dst, ETH_ALEN); | |
154 | memcpy(mgmt->bssid, dst, ETH_ALEN); | |
155 | } else { | |
156 | memset(mgmt->da, 0xff, ETH_ALEN); | |
157 | memset(mgmt->bssid, 0xff, ETH_ALEN); | |
158 | } | |
159 | pos = skb_put(skb, 2 + ssid_len); | |
160 | *pos++ = WLAN_EID_SSID; | |
161 | *pos++ = ssid_len; | |
162 | memcpy(pos, ssid, ssid_len); | |
163 | ||
164 | supp_rates = skb_put(skb, 2); | |
165 | supp_rates[0] = WLAN_EID_SUPP_RATES; | |
166 | supp_rates[1] = 0; | |
167 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
168 | ||
169 | for (i = 0; i < sband->n_bitrates; i++) { | |
170 | struct ieee80211_rate *rate = &sband->bitrates[i]; | |
171 | if (esupp_rates) { | |
172 | pos = skb_put(skb, 1); | |
173 | esupp_rates[1]++; | |
174 | } else if (supp_rates[1] == 8) { | |
175 | esupp_rates = skb_put(skb, 3); | |
176 | esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES; | |
177 | esupp_rates[1] = 1; | |
178 | pos = &esupp_rates[2]; | |
179 | } else { | |
180 | pos = skb_put(skb, 1); | |
181 | supp_rates[1]++; | |
182 | } | |
183 | *pos = rate->bitrate / 5; | |
184 | } | |
185 | ||
186 | ieee80211_sta_tx(sdata, skb, 0); | |
187 | } | |
188 | ||
189 | /* MLME */ | |
f698d856 | 190 | static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata, |
b079ada7 | 191 | struct ieee80211_sta_bss *bss) |
e2839d8f | 192 | { |
e2839d8f VK |
193 | struct ieee80211_local *local = sdata->local; |
194 | int i, have_higher_than_11mbit = 0; | |
195 | ||
196 | ||
197 | /* cf. IEEE 802.11 9.2.12 */ | |
198 | for (i = 0; i < bss->supp_rates_len; i++) | |
199 | if ((bss->supp_rates[i] & 0x7f) * 5 > 110) | |
200 | have_higher_than_11mbit = 1; | |
201 | ||
202 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
203 | have_higher_than_11mbit) | |
204 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
205 | else | |
206 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
207 | ||
208 | ||
209 | if (local->ops->conf_tx) { | |
210 | struct ieee80211_tx_queue_params qparam; | |
e2839d8f VK |
211 | |
212 | memset(&qparam, 0, sizeof(qparam)); | |
213 | ||
214 | qparam.aifs = 2; | |
215 | ||
216 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
217 | !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)) | |
218 | qparam.cw_min = 31; | |
219 | else | |
220 | qparam.cw_min = 15; | |
221 | ||
222 | qparam.cw_max = 1023; | |
223 | qparam.txop = 0; | |
224 | ||
e100bb64 JB |
225 | for (i = 0; i < local_to_hw(local)->queues; i++) |
226 | local->ops->conf_tx(local_to_hw(local), i, &qparam); | |
e2839d8f VK |
227 | } |
228 | } | |
229 | ||
f698d856 | 230 | static void ieee80211_sta_wmm_params(struct ieee80211_local *local, |
f0706e82 JB |
231 | struct ieee80211_if_sta *ifsta, |
232 | u8 *wmm_param, size_t wmm_param_len) | |
233 | { | |
f0706e82 JB |
234 | struct ieee80211_tx_queue_params params; |
235 | size_t left; | |
236 | int count; | |
237 | u8 *pos; | |
238 | ||
3434fbd3 JB |
239 | if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED)) |
240 | return; | |
241 | ||
242 | if (!wmm_param) | |
243 | return; | |
244 | ||
f0706e82 JB |
245 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) |
246 | return; | |
247 | count = wmm_param[6] & 0x0f; | |
248 | if (count == ifsta->wmm_last_param_set) | |
249 | return; | |
250 | ifsta->wmm_last_param_set = count; | |
251 | ||
252 | pos = wmm_param + 8; | |
253 | left = wmm_param_len - 8; | |
254 | ||
255 | memset(¶ms, 0, sizeof(params)); | |
256 | ||
257 | if (!local->ops->conf_tx) | |
258 | return; | |
259 | ||
260 | local->wmm_acm = 0; | |
261 | for (; left >= 4; left -= 4, pos += 4) { | |
262 | int aci = (pos[0] >> 5) & 0x03; | |
263 | int acm = (pos[0] >> 4) & 0x01; | |
264 | int queue; | |
265 | ||
266 | switch (aci) { | |
267 | case 1: | |
e100bb64 | 268 | queue = 3; |
988c0f72 | 269 | if (acm) |
f0706e82 | 270 | local->wmm_acm |= BIT(0) | BIT(3); |
f0706e82 JB |
271 | break; |
272 | case 2: | |
e100bb64 | 273 | queue = 1; |
988c0f72 | 274 | if (acm) |
f0706e82 | 275 | local->wmm_acm |= BIT(4) | BIT(5); |
f0706e82 JB |
276 | break; |
277 | case 3: | |
e100bb64 | 278 | queue = 0; |
988c0f72 | 279 | if (acm) |
f0706e82 | 280 | local->wmm_acm |= BIT(6) | BIT(7); |
f0706e82 JB |
281 | break; |
282 | case 0: | |
283 | default: | |
e100bb64 | 284 | queue = 2; |
988c0f72 | 285 | if (acm) |
f0706e82 | 286 | local->wmm_acm |= BIT(1) | BIT(2); |
f0706e82 JB |
287 | break; |
288 | } | |
289 | ||
290 | params.aifs = pos[0] & 0x0f; | |
291 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); | |
292 | params.cw_min = ecw2cw(pos[1] & 0x0f); | |
f434b2d1 | 293 | params.txop = get_unaligned_le16(pos + 2); |
f4ea83dd | 294 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
f0706e82 | 295 | printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d " |
3330d7be | 296 | "cWmin=%d cWmax=%d txop=%d\n", |
f698d856 | 297 | local->mdev->name, queue, aci, acm, params.aifs, params.cw_min, |
3330d7be JB |
298 | params.cw_max, params.txop); |
299 | #endif | |
f0706e82 JB |
300 | /* TODO: handle ACM (block TX, fallback to next lowest allowed |
301 | * AC for now) */ | |
302 | if (local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) { | |
303 | printk(KERN_DEBUG "%s: failed to set TX queue " | |
f698d856 | 304 | "parameters for queue %d\n", local->mdev->name, queue); |
f0706e82 JB |
305 | } |
306 | } | |
307 | } | |
308 | ||
50c4afb9 JL |
309 | static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata, |
310 | bool use_protection, | |
311 | bool use_short_preamble) | |
5628221c | 312 | { |
471b3efd | 313 | struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf; |
ebd74487 | 314 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
5628221c | 315 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
0795af57 | 316 | DECLARE_MAC_BUF(mac); |
ebd74487 | 317 | #endif |
471b3efd | 318 | u32 changed = 0; |
5628221c | 319 | |
471b3efd | 320 | if (use_protection != bss_conf->use_cts_prot) { |
f4ea83dd | 321 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
5628221c DD |
322 | if (net_ratelimit()) { |
323 | printk(KERN_DEBUG "%s: CTS protection %s (BSSID=" | |
0795af57 | 324 | "%s)\n", |
471b3efd | 325 | sdata->dev->name, |
5628221c | 326 | use_protection ? "enabled" : "disabled", |
0795af57 | 327 | print_mac(mac, ifsta->bssid)); |
5628221c | 328 | } |
f4ea83dd | 329 | #endif |
471b3efd JB |
330 | bss_conf->use_cts_prot = use_protection; |
331 | changed |= BSS_CHANGED_ERP_CTS_PROT; | |
5628221c | 332 | } |
7e9ed188 | 333 | |
d43c7b37 | 334 | if (use_short_preamble != bss_conf->use_short_preamble) { |
f4ea83dd | 335 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
7e9ed188 DD |
336 | if (net_ratelimit()) { |
337 | printk(KERN_DEBUG "%s: switched to %s barker preamble" | |
0795af57 | 338 | " (BSSID=%s)\n", |
471b3efd | 339 | sdata->dev->name, |
d43c7b37 | 340 | use_short_preamble ? "short" : "long", |
0795af57 | 341 | print_mac(mac, ifsta->bssid)); |
7e9ed188 | 342 | } |
f4ea83dd | 343 | #endif |
d43c7b37 | 344 | bss_conf->use_short_preamble = use_short_preamble; |
471b3efd | 345 | changed |= BSS_CHANGED_ERP_PREAMBLE; |
7e9ed188 | 346 | } |
d9430a32 | 347 | |
471b3efd | 348 | return changed; |
5628221c DD |
349 | } |
350 | ||
50c4afb9 JL |
351 | static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata, |
352 | u8 erp_value) | |
353 | { | |
354 | bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0; | |
355 | bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0; | |
356 | ||
357 | return ieee80211_handle_protect_preamb(sdata, | |
358 | use_protection, use_short_preamble); | |
359 | } | |
360 | ||
361 | static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, | |
362 | struct ieee80211_sta_bss *bss) | |
363 | { | |
364 | u32 changed = 0; | |
365 | ||
366 | if (bss->has_erp_value) | |
367 | changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value); | |
368 | else { | |
369 | u16 capab = bss->capability; | |
370 | changed |= ieee80211_handle_protect_preamb(sdata, false, | |
371 | (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0); | |
372 | } | |
373 | ||
374 | return changed; | |
375 | } | |
376 | ||
f5e5bf25 TW |
377 | static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata, |
378 | struct ieee80211_if_sta *ifsta) | |
379 | { | |
380 | union iwreq_data wrqu; | |
381 | memset(&wrqu, 0, sizeof(wrqu)); | |
382 | if (ifsta->flags & IEEE80211_STA_ASSOCIATED) | |
383 | memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN); | |
384 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; | |
385 | wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL); | |
386 | } | |
387 | ||
f698d856 | 388 | static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
389 | struct ieee80211_if_sta *ifsta) |
390 | { | |
f0706e82 JB |
391 | union iwreq_data wrqu; |
392 | ||
f0706e82 | 393 | if (ifsta->assocreq_ies) { |
087d833e JM |
394 | memset(&wrqu, 0, sizeof(wrqu)); |
395 | wrqu.data.length = ifsta->assocreq_ies_len; | |
b171e19e | 396 | wireless_send_event(sdata->dev, IWEVASSOCREQIE, &wrqu, |
087d833e | 397 | ifsta->assocreq_ies); |
f0706e82 | 398 | } |
087d833e JM |
399 | if (ifsta->assocresp_ies) { |
400 | memset(&wrqu, 0, sizeof(wrqu)); | |
401 | wrqu.data.length = ifsta->assocresp_ies_len; | |
b171e19e | 402 | wireless_send_event(sdata->dev, IWEVASSOCRESPIE, &wrqu, |
087d833e | 403 | ifsta->assocresp_ies); |
f0706e82 | 404 | } |
f0706e82 JB |
405 | } |
406 | ||
407 | ||
f698d856 | 408 | static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
f5e5bf25 | 409 | struct ieee80211_if_sta *ifsta) |
f0706e82 | 410 | { |
471b3efd | 411 | struct ieee80211_local *local = sdata->local; |
38668c05 | 412 | struct ieee80211_conf *conf = &local_to_hw(local)->conf; |
471b3efd | 413 | u32 changed = BSS_CHANGED_ASSOC; |
f0706e82 | 414 | |
f5e5bf25 | 415 | struct ieee80211_sta_bss *bss; |
d6f2da5b | 416 | |
f5e5bf25 | 417 | ifsta->flags |= IEEE80211_STA_ASSOCIATED; |
5628221c | 418 | |
f5e5bf25 TW |
419 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
420 | return; | |
21c0cbe7 | 421 | |
f5e5bf25 TW |
422 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
423 | conf->channel->center_freq, | |
424 | ifsta->ssid, ifsta->ssid_len); | |
425 | if (bss) { | |
426 | /* set timing information */ | |
427 | sdata->bss_conf.beacon_int = bss->beacon_int; | |
428 | sdata->bss_conf.timestamp = bss->timestamp; | |
429 | sdata->bss_conf.dtim_period = bss->dtim_period; | |
21c0cbe7 | 430 | |
f5e5bf25 | 431 | changed |= ieee80211_handle_bss_capability(sdata, bss); |
5628221c | 432 | |
f5e5bf25 TW |
433 | ieee80211_rx_bss_put(local, bss); |
434 | } | |
38668c05 | 435 | |
f5e5bf25 TW |
436 | if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) { |
437 | changed |= BSS_CHANGED_HT; | |
438 | sdata->bss_conf.assoc_ht = 1; | |
439 | sdata->bss_conf.ht_conf = &conf->ht_conf; | |
440 | sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf; | |
441 | } | |
38668c05 | 442 | |
f5e5bf25 TW |
443 | ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET; |
444 | memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN); | |
445 | ieee80211_sta_send_associnfo(sdata, ifsta); | |
38668c05 | 446 | |
f0706e82 | 447 | ifsta->last_probe = jiffies; |
f5e5bf25 | 448 | ieee80211_led_assoc(local, 1); |
471b3efd | 449 | |
f5e5bf25 | 450 | sdata->bss_conf.assoc = 1; |
471b3efd | 451 | ieee80211_bss_info_change_notify(sdata, changed); |
8db9369f | 452 | |
24e64622 | 453 | netif_tx_start_all_queues(sdata->dev); |
f5e5bf25 | 454 | netif_carrier_on(sdata->dev); |
8db9369f | 455 | |
f5e5bf25 | 456 | ieee80211_sta_send_apinfo(sdata, ifsta); |
f0706e82 JB |
457 | } |
458 | ||
9859b81e RR |
459 | static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata, |
460 | struct ieee80211_if_sta *ifsta) | |
461 | { | |
462 | DECLARE_MAC_BUF(mac); | |
463 | ||
464 | ifsta->direct_probe_tries++; | |
465 | if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) { | |
466 | printk(KERN_DEBUG "%s: direct probe to AP %s timed out\n", | |
467 | sdata->dev->name, print_mac(mac, ifsta->bssid)); | |
468 | ifsta->state = IEEE80211_STA_MLME_DISABLED; | |
469 | return; | |
470 | } | |
471 | ||
472 | printk(KERN_DEBUG "%s: direct probe to AP %s try %d\n", | |
473 | sdata->dev->name, print_mac(mac, ifsta->bssid), | |
474 | ifsta->direct_probe_tries); | |
475 | ||
476 | ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE; | |
477 | ||
478 | set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request); | |
479 | ||
480 | /* Direct probe is sent to broadcast address as some APs | |
481 | * will not answer to direct packet in unassociated state. | |
482 | */ | |
483 | ieee80211_send_probe_req(sdata, NULL, | |
484 | ifsta->ssid, ifsta->ssid_len); | |
485 | ||
486 | mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT); | |
487 | } | |
488 | ||
f0706e82 | 489 | |
f698d856 | 490 | static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
491 | struct ieee80211_if_sta *ifsta) |
492 | { | |
0795af57 JP |
493 | DECLARE_MAC_BUF(mac); |
494 | ||
f0706e82 JB |
495 | ifsta->auth_tries++; |
496 | if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0795af57 | 497 | printk(KERN_DEBUG "%s: authentication with AP %s" |
f0706e82 | 498 | " timed out\n", |
f698d856 | 499 | sdata->dev->name, print_mac(mac, ifsta->bssid)); |
48c2fc59 | 500 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
f0706e82 JB |
501 | return; |
502 | } | |
503 | ||
48c2fc59 | 504 | ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE; |
0795af57 | 505 | printk(KERN_DEBUG "%s: authenticate with AP %s\n", |
f698d856 | 506 | sdata->dev->name, print_mac(mac, ifsta->bssid)); |
f0706e82 | 507 | |
f698d856 | 508 | ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0); |
f0706e82 JB |
509 | |
510 | mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT); | |
511 | } | |
512 | ||
36d16ae7 HS |
513 | static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss, |
514 | struct ieee80211_supported_band *sband, | |
515 | u64 *rates) | |
516 | { | |
517 | int i, j, count; | |
518 | *rates = 0; | |
519 | count = 0; | |
520 | for (i = 0; i < bss->supp_rates_len; i++) { | |
521 | int rate = (bss->supp_rates[i] & 0x7F) * 5; | |
522 | ||
523 | for (j = 0; j < sband->n_bitrates; j++) | |
524 | if (sband->bitrates[j].bitrate == rate) { | |
525 | *rates |= BIT(j); | |
526 | count++; | |
527 | break; | |
528 | } | |
529 | } | |
530 | ||
531 | return count; | |
532 | } | |
f0706e82 | 533 | |
f698d856 | 534 | static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
535 | struct ieee80211_if_sta *ifsta) |
536 | { | |
f698d856 | 537 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
538 | struct sk_buff *skb; |
539 | struct ieee80211_mgmt *mgmt; | |
43ac2ca3 | 540 | u8 *pos, *ies, *ht_add_ie; |
36d16ae7 | 541 | int i, len, count, rates_len, supp_rates_len; |
f0706e82 JB |
542 | u16 capab; |
543 | struct ieee80211_sta_bss *bss; | |
544 | int wmm = 0; | |
8318d78a | 545 | struct ieee80211_supported_band *sband; |
36d16ae7 | 546 | u64 rates = 0; |
f0706e82 JB |
547 | |
548 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
549 | sizeof(*mgmt) + 200 + ifsta->extra_ie_len + | |
550 | ifsta->ssid_len); | |
551 | if (!skb) { | |
552 | printk(KERN_DEBUG "%s: failed to allocate buffer for assoc " | |
f698d856 | 553 | "frame\n", sdata->dev->name); |
f0706e82 JB |
554 | return; |
555 | } | |
556 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
557 | ||
8318d78a JB |
558 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
559 | ||
f0706e82 | 560 | capab = ifsta->capab; |
8318d78a JB |
561 | |
562 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) { | |
563 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) | |
564 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; | |
565 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) | |
566 | capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; | |
f0706e82 | 567 | } |
8318d78a | 568 | |
f698d856 | 569 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
8318d78a | 570 | local->hw.conf.channel->center_freq, |
cffdd30d | 571 | ifsta->ssid, ifsta->ssid_len); |
f0706e82 JB |
572 | if (bss) { |
573 | if (bss->capability & WLAN_CAPABILITY_PRIVACY) | |
574 | capab |= WLAN_CAPABILITY_PRIVACY; | |
43ac2ca3 | 575 | if (bss->wmm_used) |
f0706e82 | 576 | wmm = 1; |
0d580a77 HS |
577 | |
578 | /* get all rates supported by the device and the AP as | |
579 | * some APs don't like getting a superset of their rates | |
580 | * in the association request (e.g. D-Link DAP 1353 in | |
581 | * b-only mode) */ | |
582 | rates_len = ieee80211_compatible_rates(bss, sband, &rates); | |
583 | ||
06ff47bc TW |
584 | if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && |
585 | (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)) | |
586 | capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; | |
587 | ||
3e122be0 | 588 | ieee80211_rx_bss_put(local, bss); |
0d580a77 HS |
589 | } else { |
590 | rates = ~0; | |
591 | rates_len = sband->n_bitrates; | |
f0706e82 JB |
592 | } |
593 | ||
594 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
595 | memset(mgmt, 0, 24); | |
596 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
f698d856 | 597 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
f0706e82 JB |
598 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); |
599 | ||
d6f2da5b | 600 | if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) { |
f0706e82 | 601 | skb_put(skb, 10); |
e7827a70 HH |
602 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
603 | IEEE80211_STYPE_REASSOC_REQ); | |
f0706e82 | 604 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); |
ea95bba4 TW |
605 | mgmt->u.reassoc_req.listen_interval = |
606 | cpu_to_le16(local->hw.conf.listen_interval); | |
f0706e82 JB |
607 | memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid, |
608 | ETH_ALEN); | |
609 | } else { | |
610 | skb_put(skb, 4); | |
e7827a70 HH |
611 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
612 | IEEE80211_STYPE_ASSOC_REQ); | |
f0706e82 | 613 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); |
ea95bba4 TW |
614 | mgmt->u.reassoc_req.listen_interval = |
615 | cpu_to_le16(local->hw.conf.listen_interval); | |
f0706e82 JB |
616 | } |
617 | ||
618 | /* SSID */ | |
619 | ies = pos = skb_put(skb, 2 + ifsta->ssid_len); | |
620 | *pos++ = WLAN_EID_SSID; | |
621 | *pos++ = ifsta->ssid_len; | |
622 | memcpy(pos, ifsta->ssid, ifsta->ssid_len); | |
623 | ||
0d580a77 | 624 | /* add all rates which were marked to be used above */ |
36d16ae7 HS |
625 | supp_rates_len = rates_len; |
626 | if (supp_rates_len > 8) | |
627 | supp_rates_len = 8; | |
628 | ||
8318d78a | 629 | len = sband->n_bitrates; |
36d16ae7 | 630 | pos = skb_put(skb, supp_rates_len + 2); |
f0706e82 | 631 | *pos++ = WLAN_EID_SUPP_RATES; |
36d16ae7 | 632 | *pos++ = supp_rates_len; |
f0706e82 | 633 | |
36d16ae7 HS |
634 | count = 0; |
635 | for (i = 0; i < sband->n_bitrates; i++) { | |
636 | if (BIT(i) & rates) { | |
8318d78a | 637 | int rate = sband->bitrates[i].bitrate; |
f0706e82 | 638 | *pos++ = (u8) (rate / 5); |
36d16ae7 HS |
639 | if (++count == 8) |
640 | break; | |
641 | } | |
642 | } | |
643 | ||
8ab65b03 | 644 | if (rates_len > count) { |
36d16ae7 HS |
645 | pos = skb_put(skb, rates_len - count + 2); |
646 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
647 | *pos++ = rates_len - count; | |
648 | ||
649 | for (i++; i < sband->n_bitrates; i++) { | |
650 | if (BIT(i) & rates) { | |
651 | int rate = sband->bitrates[i].bitrate; | |
652 | *pos++ = (u8) (rate / 5); | |
653 | } | |
f0706e82 JB |
654 | } |
655 | } | |
656 | ||
06ff47bc TW |
657 | if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { |
658 | /* 1. power capabilities */ | |
659 | pos = skb_put(skb, 4); | |
660 | *pos++ = WLAN_EID_PWR_CAPABILITY; | |
661 | *pos++ = 2; | |
662 | *pos++ = 0; /* min tx power */ | |
663 | *pos++ = local->hw.conf.channel->max_power; /* max tx power */ | |
664 | ||
665 | /* 2. supported channels */ | |
666 | /* TODO: get this in reg domain format */ | |
667 | pos = skb_put(skb, 2 * sband->n_channels + 2); | |
668 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; | |
669 | *pos++ = 2 * sband->n_channels; | |
670 | for (i = 0; i < sband->n_channels; i++) { | |
671 | *pos++ = ieee80211_frequency_to_channel( | |
672 | sband->channels[i].center_freq); | |
673 | *pos++ = 1; /* one channel in the subband*/ | |
674 | } | |
675 | } | |
676 | ||
f0706e82 JB |
677 | if (ifsta->extra_ie) { |
678 | pos = skb_put(skb, ifsta->extra_ie_len); | |
679 | memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len); | |
680 | } | |
681 | ||
d6f2da5b | 682 | if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) { |
f0706e82 JB |
683 | pos = skb_put(skb, 9); |
684 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
685 | *pos++ = 7; /* len */ | |
686 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ | |
687 | *pos++ = 0x50; | |
688 | *pos++ = 0xf2; | |
689 | *pos++ = 2; /* WME */ | |
690 | *pos++ = 0; /* WME info */ | |
691 | *pos++ = 1; /* WME ver */ | |
692 | *pos++ = 0; | |
693 | } | |
3434fbd3 | 694 | |
c7153508 | 695 | /* wmm support is a must to HT */ |
3434fbd3 | 696 | if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) && |
43ac2ca3 JM |
697 | sband->ht_info.ht_supported && |
698 | (ht_add_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_EXTRA_INFO))) { | |
9306102e | 699 | struct ieee80211_ht_addt_info *ht_add_info = |
43ac2ca3 | 700 | (struct ieee80211_ht_addt_info *)ht_add_ie; |
9306102e EG |
701 | u16 cap = sband->ht_info.cap; |
702 | __le16 tmp; | |
703 | u32 flags = local->hw.conf.channel->flags; | |
704 | ||
705 | switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) { | |
706 | case IEEE80211_HT_IE_CHA_SEC_ABOVE: | |
707 | if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) { | |
708 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH; | |
709 | cap &= ~IEEE80211_HT_CAP_SGI_40; | |
710 | } | |
711 | break; | |
712 | case IEEE80211_HT_IE_CHA_SEC_BELOW: | |
713 | if (flags & IEEE80211_CHAN_NO_FAT_BELOW) { | |
714 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH; | |
715 | cap &= ~IEEE80211_HT_CAP_SGI_40; | |
716 | } | |
717 | break; | |
718 | } | |
719 | ||
720 | tmp = cpu_to_le16(cap); | |
c7153508 RR |
721 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2); |
722 | *pos++ = WLAN_EID_HT_CAPABILITY; | |
723 | *pos++ = sizeof(struct ieee80211_ht_cap); | |
724 | memset(pos, 0, sizeof(struct ieee80211_ht_cap)); | |
725 | memcpy(pos, &tmp, sizeof(u16)); | |
726 | pos += sizeof(u16); | |
8318d78a JB |
727 | /* TODO: needs a define here for << 2 */ |
728 | *pos++ = sband->ht_info.ampdu_factor | | |
729 | (sband->ht_info.ampdu_density << 2); | |
730 | memcpy(pos, sband->ht_info.supp_mcs_set, 16); | |
c7153508 | 731 | } |
f0706e82 JB |
732 | |
733 | kfree(ifsta->assocreq_ies); | |
734 | ifsta->assocreq_ies_len = (skb->data + skb->len) - ies; | |
0ec0b7ac | 735 | ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL); |
f0706e82 JB |
736 | if (ifsta->assocreq_ies) |
737 | memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len); | |
738 | ||
f698d856 | 739 | ieee80211_sta_tx(sdata, skb, 0); |
f0706e82 JB |
740 | } |
741 | ||
742 | ||
f698d856 | 743 | static void ieee80211_send_deauth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
744 | struct ieee80211_if_sta *ifsta, u16 reason) |
745 | { | |
f698d856 | 746 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
747 | struct sk_buff *skb; |
748 | struct ieee80211_mgmt *mgmt; | |
749 | ||
750 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); | |
751 | if (!skb) { | |
752 | printk(KERN_DEBUG "%s: failed to allocate buffer for deauth " | |
f698d856 | 753 | "frame\n", sdata->dev->name); |
f0706e82 JB |
754 | return; |
755 | } | |
756 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
757 | ||
758 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
759 | memset(mgmt, 0, 24); | |
760 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
f698d856 | 761 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
f0706e82 | 762 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); |
e7827a70 HH |
763 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
764 | IEEE80211_STYPE_DEAUTH); | |
f0706e82 JB |
765 | skb_put(skb, 2); |
766 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); | |
767 | ||
f698d856 | 768 | ieee80211_sta_tx(sdata, skb, 0); |
f0706e82 JB |
769 | } |
770 | ||
60f8b39c JB |
771 | static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata) |
772 | { | |
773 | if (!sdata || !sdata->default_key || | |
774 | sdata->default_key->conf.alg != ALG_WEP) | |
775 | return 0; | |
776 | return 1; | |
777 | } | |
f0706e82 | 778 | |
f698d856 | 779 | static void ieee80211_send_disassoc(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
780 | struct ieee80211_if_sta *ifsta, u16 reason) |
781 | { | |
f698d856 | 782 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
783 | struct sk_buff *skb; |
784 | struct ieee80211_mgmt *mgmt; | |
785 | ||
786 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); | |
787 | if (!skb) { | |
788 | printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc " | |
f698d856 | 789 | "frame\n", sdata->dev->name); |
f0706e82 JB |
790 | return; |
791 | } | |
792 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
793 | ||
794 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
795 | memset(mgmt, 0, 24); | |
796 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
f698d856 | 797 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
f0706e82 | 798 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); |
e7827a70 HH |
799 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
800 | IEEE80211_STYPE_DISASSOC); | |
f0706e82 JB |
801 | skb_put(skb, 2); |
802 | mgmt->u.disassoc.reason_code = cpu_to_le16(reason); | |
803 | ||
f698d856 | 804 | ieee80211_sta_tx(sdata, skb, 0); |
f0706e82 JB |
805 | } |
806 | ||
aa458d17 TW |
807 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, |
808 | struct ieee80211_if_sta *ifsta, bool deauth, | |
809 | bool self_disconnected, u16 reason) | |
810 | { | |
811 | struct ieee80211_local *local = sdata->local; | |
812 | struct sta_info *sta; | |
f5e5bf25 | 813 | u32 changed = BSS_CHANGED_ASSOC; |
aa458d17 TW |
814 | |
815 | rcu_read_lock(); | |
816 | ||
817 | sta = sta_info_get(local, ifsta->bssid); | |
818 | if (!sta) { | |
819 | rcu_read_unlock(); | |
820 | return; | |
821 | } | |
822 | ||
823 | if (deauth) { | |
824 | ifsta->direct_probe_tries = 0; | |
825 | ifsta->auth_tries = 0; | |
826 | } | |
827 | ifsta->assoc_scan_tries = 0; | |
828 | ifsta->assoc_tries = 0; | |
829 | ||
24e64622 | 830 | netif_tx_stop_all_queues(sdata->dev); |
aa458d17 TW |
831 | netif_carrier_off(sdata->dev); |
832 | ||
833 | ieee80211_sta_tear_down_BA_sessions(sdata, sta->addr); | |
834 | ||
835 | if (self_disconnected) { | |
836 | if (deauth) | |
837 | ieee80211_send_deauth(sdata, ifsta, reason); | |
838 | else | |
839 | ieee80211_send_disassoc(sdata, ifsta, reason); | |
840 | } | |
841 | ||
f5e5bf25 TW |
842 | ifsta->flags &= ~IEEE80211_STA_ASSOCIATED; |
843 | changed |= ieee80211_reset_erp_info(sdata); | |
844 | ||
845 | if (sdata->bss_conf.assoc_ht) | |
846 | changed |= BSS_CHANGED_HT; | |
847 | ||
848 | sdata->bss_conf.assoc_ht = 0; | |
849 | sdata->bss_conf.ht_conf = NULL; | |
850 | sdata->bss_conf.ht_bss_conf = NULL; | |
851 | ||
852 | ieee80211_led_assoc(local, 0); | |
853 | sdata->bss_conf.assoc = 0; | |
854 | ||
855 | ieee80211_sta_send_apinfo(sdata, ifsta); | |
aa458d17 TW |
856 | |
857 | if (self_disconnected) | |
858 | ifsta->state = IEEE80211_STA_MLME_DISABLED; | |
859 | ||
860 | sta_info_unlink(&sta); | |
861 | ||
862 | rcu_read_unlock(); | |
863 | ||
864 | sta_info_destroy(sta); | |
865 | } | |
f0706e82 | 866 | |
f698d856 | 867 | static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
868 | struct ieee80211_if_sta *ifsta) |
869 | { | |
f698d856 | 870 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 871 | struct ieee80211_sta_bss *bss; |
5b98b1f7 JB |
872 | int bss_privacy; |
873 | int wep_privacy; | |
874 | int privacy_invoked; | |
f0706e82 | 875 | |
5b98b1f7 | 876 | if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL)) |
f0706e82 JB |
877 | return 0; |
878 | ||
f698d856 | 879 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
8318d78a | 880 | local->hw.conf.channel->center_freq, |
cffdd30d | 881 | ifsta->ssid, ifsta->ssid_len); |
f0706e82 JB |
882 | if (!bss) |
883 | return 0; | |
884 | ||
5b98b1f7 | 885 | bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY); |
f698d856 | 886 | wep_privacy = !!ieee80211_sta_wep_configured(sdata); |
5b98b1f7 | 887 | privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED); |
f0706e82 | 888 | |
3e122be0 | 889 | ieee80211_rx_bss_put(local, bss); |
f0706e82 | 890 | |
5b98b1f7 JB |
891 | if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked)) |
892 | return 0; | |
893 | ||
894 | return 1; | |
f0706e82 JB |
895 | } |
896 | ||
f698d856 | 897 | static void ieee80211_associate(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
898 | struct ieee80211_if_sta *ifsta) |
899 | { | |
0795af57 JP |
900 | DECLARE_MAC_BUF(mac); |
901 | ||
f0706e82 JB |
902 | ifsta->assoc_tries++; |
903 | if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) { | |
0795af57 | 904 | printk(KERN_DEBUG "%s: association with AP %s" |
f0706e82 | 905 | " timed out\n", |
f698d856 | 906 | sdata->dev->name, print_mac(mac, ifsta->bssid)); |
48c2fc59 | 907 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
f0706e82 JB |
908 | return; |
909 | } | |
910 | ||
48c2fc59 | 911 | ifsta->state = IEEE80211_STA_MLME_ASSOCIATE; |
0795af57 | 912 | printk(KERN_DEBUG "%s: associate with AP %s\n", |
f698d856 JBG |
913 | sdata->dev->name, print_mac(mac, ifsta->bssid)); |
914 | if (ieee80211_privacy_mismatch(sdata, ifsta)) { | |
f0706e82 | 915 | printk(KERN_DEBUG "%s: mismatch in privacy configuration and " |
f698d856 | 916 | "mixed-cell disabled - abort association\n", sdata->dev->name); |
48c2fc59 | 917 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
f0706e82 JB |
918 | return; |
919 | } | |
920 | ||
f698d856 | 921 | ieee80211_send_assoc(sdata, ifsta); |
f0706e82 JB |
922 | |
923 | mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT); | |
924 | } | |
925 | ||
926 | ||
f698d856 | 927 | static void ieee80211_associated(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
928 | struct ieee80211_if_sta *ifsta) |
929 | { | |
f698d856 | 930 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
931 | struct sta_info *sta; |
932 | int disassoc; | |
0795af57 | 933 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
934 | |
935 | /* TODO: start monitoring current AP signal quality and number of | |
936 | * missed beacons. Scan other channels every now and then and search | |
937 | * for better APs. */ | |
938 | /* TODO: remove expired BSSes */ | |
939 | ||
48c2fc59 | 940 | ifsta->state = IEEE80211_STA_MLME_ASSOCIATED; |
f0706e82 | 941 | |
d0709a65 JB |
942 | rcu_read_lock(); |
943 | ||
f0706e82 JB |
944 | sta = sta_info_get(local, ifsta->bssid); |
945 | if (!sta) { | |
0795af57 | 946 | printk(KERN_DEBUG "%s: No STA entry for own AP %s\n", |
f698d856 | 947 | sdata->dev->name, print_mac(mac, ifsta->bssid)); |
f0706e82 JB |
948 | disassoc = 1; |
949 | } else { | |
950 | disassoc = 0; | |
951 | if (time_after(jiffies, | |
952 | sta->last_rx + IEEE80211_MONITORING_INTERVAL)) { | |
d6f2da5b | 953 | if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) { |
f0706e82 | 954 | printk(KERN_DEBUG "%s: No ProbeResp from " |
0795af57 | 955 | "current AP %s - assume out of " |
f0706e82 | 956 | "range\n", |
f698d856 | 957 | sdata->dev->name, print_mac(mac, ifsta->bssid)); |
f0706e82 | 958 | disassoc = 1; |
d6f2da5b | 959 | } else |
f698d856 | 960 | ieee80211_send_probe_req(sdata, ifsta->bssid, |
f0706e82 JB |
961 | local->scan_ssid, |
962 | local->scan_ssid_len); | |
d6f2da5b | 963 | ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL; |
f0706e82 | 964 | } else { |
d6f2da5b | 965 | ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL; |
f0706e82 JB |
966 | if (time_after(jiffies, ifsta->last_probe + |
967 | IEEE80211_PROBE_INTERVAL)) { | |
968 | ifsta->last_probe = jiffies; | |
f698d856 | 969 | ieee80211_send_probe_req(sdata, ifsta->bssid, |
f0706e82 JB |
970 | ifsta->ssid, |
971 | ifsta->ssid_len); | |
972 | } | |
973 | } | |
f0706e82 | 974 | } |
d0709a65 JB |
975 | |
976 | rcu_read_unlock(); | |
977 | ||
60f8b39c JB |
978 | if (disassoc) |
979 | ieee80211_set_disassoc(sdata, ifsta, true, true, | |
980 | WLAN_REASON_PREV_AUTH_NOT_VALID); | |
981 | else | |
982 | mod_timer(&ifsta->timer, jiffies + | |
983 | IEEE80211_MONITORING_INTERVAL); | |
f0706e82 JB |
984 | } |
985 | ||
986 | ||
f698d856 | 987 | static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
988 | struct ieee80211_if_sta *ifsta) |
989 | { | |
f698d856 | 990 | printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name); |
d6f2da5b | 991 | ifsta->flags |= IEEE80211_STA_AUTHENTICATED; |
f698d856 | 992 | ieee80211_associate(sdata, ifsta); |
f0706e82 JB |
993 | } |
994 | ||
995 | ||
f698d856 | 996 | static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
997 | struct ieee80211_if_sta *ifsta, |
998 | struct ieee80211_mgmt *mgmt, | |
999 | size_t len) | |
1000 | { | |
1001 | u8 *pos; | |
1002 | struct ieee802_11_elems elems; | |
1003 | ||
f0706e82 | 1004 | pos = mgmt->u.auth.variable; |
67a4cce4 | 1005 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
f4ea83dd | 1006 | if (!elems.challenge) |
f0706e82 | 1007 | return; |
f698d856 | 1008 | ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2, |
f0706e82 JB |
1009 | elems.challenge_len + 2, 1); |
1010 | } | |
1011 | ||
f698d856 | 1012 | static void ieee80211_send_addba_resp(struct ieee80211_sub_if_data *sdata, u8 *da, u16 tid, |
9f985b0e RR |
1013 | u8 dialog_token, u16 status, u16 policy, |
1014 | u16 buf_size, u16 timeout) | |
1015 | { | |
9f985b0e | 1016 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
f698d856 | 1017 | struct ieee80211_local *local = sdata->local; |
9f985b0e RR |
1018 | struct sk_buff *skb; |
1019 | struct ieee80211_mgmt *mgmt; | |
1020 | u16 capab; | |
1021 | ||
3acea5b6 EK |
1022 | skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom); |
1023 | ||
9f985b0e RR |
1024 | if (!skb) { |
1025 | printk(KERN_DEBUG "%s: failed to allocate buffer " | |
f698d856 | 1026 | "for addba resp frame\n", sdata->dev->name); |
9f985b0e RR |
1027 | return; |
1028 | } | |
1029 | ||
1030 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1031 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
1032 | memset(mgmt, 0, 24); | |
1033 | memcpy(mgmt->da, da, ETH_ALEN); | |
f698d856 | 1034 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
51fb61e7 | 1035 | if (sdata->vif.type == IEEE80211_IF_TYPE_AP) |
f698d856 | 1036 | memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN); |
9f985b0e RR |
1037 | else |
1038 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
e7827a70 HH |
1039 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
1040 | IEEE80211_STYPE_ACTION); | |
9f985b0e RR |
1041 | |
1042 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp)); | |
1043 | mgmt->u.action.category = WLAN_CATEGORY_BACK; | |
1044 | mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP; | |
1045 | mgmt->u.action.u.addba_resp.dialog_token = dialog_token; | |
1046 | ||
1047 | capab = (u16)(policy << 1); /* bit 1 aggregation policy */ | |
1048 | capab |= (u16)(tid << 2); /* bit 5:2 TID number */ | |
1049 | capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */ | |
1050 | ||
1051 | mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab); | |
1052 | mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout); | |
1053 | mgmt->u.action.u.addba_resp.status = cpu_to_le16(status); | |
1054 | ||
f698d856 | 1055 | ieee80211_sta_tx(sdata, skb, 0); |
9f985b0e RR |
1056 | |
1057 | return; | |
1058 | } | |
1059 | ||
60f8b39c JB |
1060 | /* |
1061 | * After accepting the AddBA Request we activated a timer, | |
1062 | * resetting it after each frame that arrives from the originator. | |
1063 | * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed. | |
1064 | */ | |
1065 | static void sta_rx_agg_session_timer_expired(unsigned long data) | |
1066 | { | |
1067 | /* not an elegant detour, but there is no choice as the timer passes | |
1068 | * only one argument, and various sta_info are needed here, so init | |
1069 | * flow in sta_info_create gives the TID as data, while the timer_to_id | |
1070 | * array gives the sta through container_of */ | |
1071 | u8 *ptid = (u8 *)data; | |
1072 | u8 *timer_to_id = ptid - *ptid; | |
1073 | struct sta_info *sta = container_of(timer_to_id, struct sta_info, | |
1074 | timer_to_tid[0]); | |
1075 | ||
1076 | #ifdef CONFIG_MAC80211_HT_DEBUG | |
1077 | printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid); | |
1078 | #endif | |
1079 | ieee80211_sta_stop_rx_ba_session(sta->sdata, sta->addr, | |
1080 | (u16)*ptid, WLAN_BACK_TIMER, | |
1081 | WLAN_REASON_QSTA_TIMEOUT); | |
1082 | } | |
1083 | ||
f698d856 | 1084 | static void ieee80211_sta_process_addba_request(struct ieee80211_local *local, |
9f985b0e RR |
1085 | struct ieee80211_mgmt *mgmt, |
1086 | size_t len) | |
1087 | { | |
07db2183 RR |
1088 | struct ieee80211_hw *hw = &local->hw; |
1089 | struct ieee80211_conf *conf = &hw->conf; | |
9f985b0e | 1090 | struct sta_info *sta; |
07db2183 RR |
1091 | struct tid_ampdu_rx *tid_agg_rx; |
1092 | u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status; | |
9f985b0e | 1093 | u8 dialog_token; |
07db2183 RR |
1094 | int ret = -EOPNOTSUPP; |
1095 | DECLARE_MAC_BUF(mac); | |
9f985b0e | 1096 | |
d0709a65 JB |
1097 | rcu_read_lock(); |
1098 | ||
9f985b0e | 1099 | sta = sta_info_get(local, mgmt->sa); |
d0709a65 JB |
1100 | if (!sta) { |
1101 | rcu_read_unlock(); | |
9f985b0e | 1102 | return; |
d0709a65 | 1103 | } |
9f985b0e RR |
1104 | |
1105 | /* extract session parameters from addba request frame */ | |
1106 | dialog_token = mgmt->u.action.u.addba_req.dialog_token; | |
1107 | timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout); | |
07db2183 RR |
1108 | start_seq_num = |
1109 | le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4; | |
9f985b0e RR |
1110 | |
1111 | capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab); | |
1112 | ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1; | |
1113 | tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2; | |
1114 | buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6; | |
1115 | ||
9f985b0e RR |
1116 | status = WLAN_STATUS_REQUEST_DECLINED; |
1117 | ||
07db2183 RR |
1118 | /* sanity check for incoming parameters: |
1119 | * check if configuration can support the BA policy | |
1120 | * and if buffer size does not exceeds max value */ | |
1121 | if (((ba_policy != 1) | |
1122 | && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA))) | |
1123 | || (buf_size > IEEE80211_MAX_AMPDU_BUF)) { | |
1124 | status = WLAN_STATUS_INVALID_QOS_PARAM; | |
1125 | #ifdef CONFIG_MAC80211_HT_DEBUG | |
1126 | if (net_ratelimit()) | |
7b9d44cd | 1127 | printk(KERN_DEBUG "AddBA Req with bad params from " |
07db2183 RR |
1128 | "%s on tid %u. policy %d, buffer size %d\n", |
1129 | print_mac(mac, mgmt->sa), tid, ba_policy, | |
1130 | buf_size); | |
1131 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1132 | goto end_no_lock; | |
1133 | } | |
1134 | /* determine default buffer size */ | |
1135 | if (buf_size == 0) { | |
8318d78a JB |
1136 | struct ieee80211_supported_band *sband; |
1137 | ||
1138 | sband = local->hw.wiphy->bands[conf->channel->band]; | |
07db2183 | 1139 | buf_size = IEEE80211_MIN_AMPDU_BUF; |
8318d78a | 1140 | buf_size = buf_size << sband->ht_info.ampdu_factor; |
07db2183 RR |
1141 | } |
1142 | ||
07db2183 RR |
1143 | |
1144 | /* examine state machine */ | |
07346f81 | 1145 | spin_lock_bh(&sta->lock); |
07db2183 | 1146 | |
cee24a3e | 1147 | if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) { |
07db2183 RR |
1148 | #ifdef CONFIG_MAC80211_HT_DEBUG |
1149 | if (net_ratelimit()) | |
7b9d44cd | 1150 | printk(KERN_DEBUG "unexpected AddBA Req from " |
07db2183 RR |
1151 | "%s on tid %u\n", |
1152 | print_mac(mac, mgmt->sa), tid); | |
1153 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1154 | goto end; | |
1155 | } | |
1156 | ||
cee24a3e RR |
1157 | /* prepare A-MPDU MLME for Rx aggregation */ |
1158 | sta->ampdu_mlme.tid_rx[tid] = | |
1159 | kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC); | |
1160 | if (!sta->ampdu_mlme.tid_rx[tid]) { | |
f4ea83dd | 1161 | #ifdef CONFIG_MAC80211_HT_DEBUG |
cee24a3e RR |
1162 | if (net_ratelimit()) |
1163 | printk(KERN_ERR "allocate rx mlme to tid %d failed\n", | |
1164 | tid); | |
f4ea83dd | 1165 | #endif |
cee24a3e RR |
1166 | goto end; |
1167 | } | |
1168 | /* rx timer */ | |
1169 | sta->ampdu_mlme.tid_rx[tid]->session_timer.function = | |
1170 | sta_rx_agg_session_timer_expired; | |
1171 | sta->ampdu_mlme.tid_rx[tid]->session_timer.data = | |
1172 | (unsigned long)&sta->timer_to_tid[tid]; | |
1173 | init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer); | |
1174 | ||
1175 | tid_agg_rx = sta->ampdu_mlme.tid_rx[tid]; | |
1176 | ||
07db2183 RR |
1177 | /* prepare reordering buffer */ |
1178 | tid_agg_rx->reorder_buf = | |
c97c23e3 | 1179 | kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC); |
03147dfc | 1180 | if (!tid_agg_rx->reorder_buf) { |
f4ea83dd | 1181 | #ifdef CONFIG_MAC80211_HT_DEBUG |
03147dfc JB |
1182 | if (net_ratelimit()) |
1183 | printk(KERN_ERR "can not allocate reordering buffer " | |
1184 | "to tid %d\n", tid); | |
f4ea83dd | 1185 | #endif |
cee24a3e | 1186 | kfree(sta->ampdu_mlme.tid_rx[tid]); |
07db2183 RR |
1187 | goto end; |
1188 | } | |
1189 | memset(tid_agg_rx->reorder_buf, 0, | |
c97c23e3 | 1190 | buf_size * sizeof(struct sk_buff *)); |
07db2183 RR |
1191 | |
1192 | if (local->ops->ampdu_action) | |
1193 | ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START, | |
0df3ef45 | 1194 | sta->addr, tid, &start_seq_num); |
07db2183 | 1195 | #ifdef CONFIG_MAC80211_HT_DEBUG |
513a1025 | 1196 | printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret); |
07db2183 RR |
1197 | #endif /* CONFIG_MAC80211_HT_DEBUG */ |
1198 | ||
1199 | if (ret) { | |
1200 | kfree(tid_agg_rx->reorder_buf); | |
cee24a3e RR |
1201 | kfree(tid_agg_rx); |
1202 | sta->ampdu_mlme.tid_rx[tid] = NULL; | |
07db2183 RR |
1203 | goto end; |
1204 | } | |
1205 | ||
1206 | /* change state and send addba resp */ | |
cee24a3e | 1207 | sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL; |
07db2183 RR |
1208 | tid_agg_rx->dialog_token = dialog_token; |
1209 | tid_agg_rx->ssn = start_seq_num; | |
1210 | tid_agg_rx->head_seq_num = start_seq_num; | |
1211 | tid_agg_rx->buf_size = buf_size; | |
1212 | tid_agg_rx->timeout = timeout; | |
1213 | tid_agg_rx->stored_mpdu_num = 0; | |
1214 | status = WLAN_STATUS_SUCCESS; | |
1215 | end: | |
07346f81 | 1216 | spin_unlock_bh(&sta->lock); |
07db2183 RR |
1217 | |
1218 | end_no_lock: | |
f698d856 | 1219 | ieee80211_send_addba_resp(sta->sdata, sta->addr, tid, |
d0709a65 JB |
1220 | dialog_token, status, 1, buf_size, timeout); |
1221 | rcu_read_unlock(); | |
9f985b0e | 1222 | } |
f0706e82 | 1223 | |
f698d856 | 1224 | static void ieee80211_sta_process_addba_resp(struct ieee80211_local *local, |
eadc8d9e RR |
1225 | struct ieee80211_mgmt *mgmt, |
1226 | size_t len) | |
1227 | { | |
eadc8d9e RR |
1228 | struct ieee80211_hw *hw = &local->hw; |
1229 | struct sta_info *sta; | |
1230 | u16 capab; | |
1231 | u16 tid; | |
1232 | u8 *state; | |
1233 | ||
d0709a65 JB |
1234 | rcu_read_lock(); |
1235 | ||
eadc8d9e | 1236 | sta = sta_info_get(local, mgmt->sa); |
d0709a65 JB |
1237 | if (!sta) { |
1238 | rcu_read_unlock(); | |
eadc8d9e | 1239 | return; |
d0709a65 | 1240 | } |
eadc8d9e RR |
1241 | |
1242 | capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab); | |
1243 | tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2; | |
1244 | ||
cee24a3e | 1245 | state = &sta->ampdu_mlme.tid_state_tx[tid]; |
eadc8d9e | 1246 | |
07346f81 | 1247 | spin_lock_bh(&sta->lock); |
eadc8d9e | 1248 | |
cee24a3e | 1249 | if (!(*state & HT_ADDBA_REQUESTED_MSK)) { |
07346f81 | 1250 | spin_unlock_bh(&sta->lock); |
cee24a3e RR |
1251 | goto addba_resp_exit; |
1252 | } | |
1253 | ||
eadc8d9e | 1254 | if (mgmt->u.action.u.addba_resp.dialog_token != |
cee24a3e | 1255 | sta->ampdu_mlme.tid_tx[tid]->dialog_token) { |
07346f81 | 1256 | spin_unlock_bh(&sta->lock); |
eadc8d9e RR |
1257 | #ifdef CONFIG_MAC80211_HT_DEBUG |
1258 | printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid); | |
1259 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
cee24a3e | 1260 | goto addba_resp_exit; |
eadc8d9e RR |
1261 | } |
1262 | ||
cee24a3e | 1263 | del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer); |
eadc8d9e RR |
1264 | #ifdef CONFIG_MAC80211_HT_DEBUG |
1265 | printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid); | |
1266 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1267 | if (le16_to_cpu(mgmt->u.action.u.addba_resp.status) | |
1268 | == WLAN_STATUS_SUCCESS) { | |
eadc8d9e | 1269 | *state |= HT_ADDBA_RECEIVED_MSK; |
cee24a3e | 1270 | sta->ampdu_mlme.addba_req_num[tid] = 0; |
eadc8d9e | 1271 | |
f4ea83dd | 1272 | if (*state == HT_AGG_STATE_OPERATIONAL) |
eadc8d9e | 1273 | ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]); |
eadc8d9e | 1274 | |
07346f81 | 1275 | spin_unlock_bh(&sta->lock); |
eadc8d9e | 1276 | } else { |
cee24a3e | 1277 | sta->ampdu_mlme.addba_req_num[tid]++; |
eadc8d9e RR |
1278 | /* this will allow the state check in stop_BA_session */ |
1279 | *state = HT_AGG_STATE_OPERATIONAL; | |
07346f81 | 1280 | spin_unlock_bh(&sta->lock); |
eadc8d9e RR |
1281 | ieee80211_stop_tx_ba_session(hw, sta->addr, tid, |
1282 | WLAN_BACK_INITIATOR); | |
1283 | } | |
cee24a3e RR |
1284 | |
1285 | addba_resp_exit: | |
d0709a65 | 1286 | rcu_read_unlock(); |
eadc8d9e RR |
1287 | } |
1288 | ||
f698d856 | 1289 | static void ieee80211_sta_process_delba(struct ieee80211_sub_if_data *sdata, |
688b88a4 RR |
1290 | struct ieee80211_mgmt *mgmt, size_t len) |
1291 | { | |
f698d856 | 1292 | struct ieee80211_local *local = sdata->local; |
688b88a4 RR |
1293 | struct sta_info *sta; |
1294 | u16 tid, params; | |
1295 | u16 initiator; | |
1296 | DECLARE_MAC_BUF(mac); | |
1297 | ||
d0709a65 JB |
1298 | rcu_read_lock(); |
1299 | ||
688b88a4 | 1300 | sta = sta_info_get(local, mgmt->sa); |
d0709a65 JB |
1301 | if (!sta) { |
1302 | rcu_read_unlock(); | |
688b88a4 | 1303 | return; |
d0709a65 | 1304 | } |
688b88a4 RR |
1305 | |
1306 | params = le16_to_cpu(mgmt->u.action.u.delba.params); | |
1307 | tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12; | |
1308 | initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11; | |
1309 | ||
1310 | #ifdef CONFIG_MAC80211_HT_DEBUG | |
1311 | if (net_ratelimit()) | |
d92684e6 RR |
1312 | printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n", |
1313 | print_mac(mac, mgmt->sa), | |
2e354ed7 | 1314 | initiator ? "initiator" : "recipient", tid, |
688b88a4 RR |
1315 | mgmt->u.action.u.delba.reason_code); |
1316 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1317 | ||
1318 | if (initiator == WLAN_BACK_INITIATOR) | |
f698d856 | 1319 | ieee80211_sta_stop_rx_ba_session(sdata, sta->addr, tid, |
688b88a4 | 1320 | WLAN_BACK_INITIATOR, 0); |
d92684e6 | 1321 | else { /* WLAN_BACK_RECIPIENT */ |
07346f81 | 1322 | spin_lock_bh(&sta->lock); |
cee24a3e | 1323 | sta->ampdu_mlme.tid_state_tx[tid] = |
d92684e6 | 1324 | HT_AGG_STATE_OPERATIONAL; |
07346f81 | 1325 | spin_unlock_bh(&sta->lock); |
d92684e6 RR |
1326 | ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid, |
1327 | WLAN_BACK_RECIPIENT); | |
1328 | } | |
d0709a65 | 1329 | rcu_read_unlock(); |
688b88a4 RR |
1330 | } |
1331 | ||
f698d856 | 1332 | static void ieee80211_send_refuse_measurement_request(struct ieee80211_sub_if_data *sdata, |
b6623486 AK |
1333 | struct ieee80211_msrment_ie *request_ie, |
1334 | const u8 *da, const u8 *bssid, | |
1335 | u8 dialog_token) | |
1336 | { | |
f698d856 | 1337 | struct ieee80211_local *local = sdata->local; |
b6623486 AK |
1338 | struct sk_buff *skb; |
1339 | struct ieee80211_mgmt *msr_report; | |
1340 | ||
1341 | skb = dev_alloc_skb(sizeof(*msr_report) + local->hw.extra_tx_headroom + | |
1342 | sizeof(struct ieee80211_msrment_ie)); | |
1343 | ||
1344 | if (!skb) { | |
1345 | printk(KERN_ERR "%s: failed to allocate buffer for " | |
f698d856 | 1346 | "measurement report frame\n", sdata->dev->name); |
b6623486 AK |
1347 | return; |
1348 | } | |
1349 | ||
1350 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1351 | msr_report = (struct ieee80211_mgmt *)skb_put(skb, 24); | |
1352 | memset(msr_report, 0, 24); | |
1353 | memcpy(msr_report->da, da, ETH_ALEN); | |
f698d856 | 1354 | memcpy(msr_report->sa, sdata->dev->dev_addr, ETH_ALEN); |
b6623486 | 1355 | memcpy(msr_report->bssid, bssid, ETH_ALEN); |
e7827a70 | 1356 | msr_report->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
b6623486 AK |
1357 | IEEE80211_STYPE_ACTION); |
1358 | ||
1359 | skb_put(skb, 1 + sizeof(msr_report->u.action.u.measurement)); | |
1360 | msr_report->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT; | |
1361 | msr_report->u.action.u.measurement.action_code = | |
1362 | WLAN_ACTION_SPCT_MSR_RPRT; | |
1363 | msr_report->u.action.u.measurement.dialog_token = dialog_token; | |
1364 | ||
1365 | msr_report->u.action.u.measurement.element_id = WLAN_EID_MEASURE_REPORT; | |
1366 | msr_report->u.action.u.measurement.length = | |
1367 | sizeof(struct ieee80211_msrment_ie); | |
1368 | ||
1369 | memset(&msr_report->u.action.u.measurement.msr_elem, 0, | |
1370 | sizeof(struct ieee80211_msrment_ie)); | |
1371 | msr_report->u.action.u.measurement.msr_elem.token = request_ie->token; | |
1372 | msr_report->u.action.u.measurement.msr_elem.mode |= | |
1373 | IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED; | |
1374 | msr_report->u.action.u.measurement.msr_elem.type = request_ie->type; | |
1375 | ||
f698d856 | 1376 | ieee80211_sta_tx(sdata, skb, 0); |
b6623486 AK |
1377 | } |
1378 | ||
f698d856 | 1379 | static void ieee80211_sta_process_measurement_req(struct ieee80211_sub_if_data *sdata, |
b6623486 AK |
1380 | struct ieee80211_mgmt *mgmt, |
1381 | size_t len) | |
1382 | { | |
1383 | /* | |
1384 | * Ignoring measurement request is spec violation. | |
1385 | * Mandatory measurements must be reported optional | |
1386 | * measurements might be refused or reported incapable | |
1387 | * For now just refuse | |
1388 | * TODO: Answer basic measurement as unmeasured | |
1389 | */ | |
f698d856 | 1390 | ieee80211_send_refuse_measurement_request(sdata, |
b6623486 AK |
1391 | &mgmt->u.action.u.measurement.msr_elem, |
1392 | mgmt->sa, mgmt->bssid, | |
1393 | mgmt->u.action.u.measurement.dialog_token); | |
1394 | } | |
1395 | ||
1396 | ||
f698d856 | 1397 | static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1398 | struct ieee80211_if_sta *ifsta, |
1399 | struct ieee80211_mgmt *mgmt, | |
1400 | size_t len) | |
1401 | { | |
f0706e82 | 1402 | u16 auth_alg, auth_transaction, status_code; |
0795af57 | 1403 | DECLARE_MAC_BUF(mac); |
f0706e82 | 1404 | |
48c2fc59 | 1405 | if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE && |
f4ea83dd | 1406 | sdata->vif.type != IEEE80211_IF_TYPE_IBSS) |
f0706e82 | 1407 | return; |
f0706e82 | 1408 | |
f4ea83dd | 1409 | if (len < 24 + 6) |
f0706e82 | 1410 | return; |
f0706e82 | 1411 | |
51fb61e7 | 1412 | if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS && |
f4ea83dd | 1413 | memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1414 | return; |
f0706e82 | 1415 | |
51fb61e7 | 1416 | if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS && |
f4ea83dd | 1417 | memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) |
f0706e82 | 1418 | return; |
f0706e82 JB |
1419 | |
1420 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
1421 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
1422 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
1423 | ||
51fb61e7 | 1424 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) { |
135a2110 JB |
1425 | /* |
1426 | * IEEE 802.11 standard does not require authentication in IBSS | |
f0706e82 JB |
1427 | * networks and most implementations do not seem to use it. |
1428 | * However, try to reply to authentication attempts if someone | |
1429 | * has actually implemented this. | |
135a2110 | 1430 | */ |
f4ea83dd | 1431 | if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) |
f0706e82 | 1432 | return; |
f698d856 | 1433 | ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0); |
f0706e82 JB |
1434 | } |
1435 | ||
1436 | if (auth_alg != ifsta->auth_alg || | |
f4ea83dd | 1437 | auth_transaction != ifsta->auth_transaction) |
f0706e82 | 1438 | return; |
f0706e82 JB |
1439 | |
1440 | if (status_code != WLAN_STATUS_SUCCESS) { | |
f0706e82 JB |
1441 | if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) { |
1442 | u8 algs[3]; | |
1443 | const int num_algs = ARRAY_SIZE(algs); | |
1444 | int i, pos; | |
1445 | algs[0] = algs[1] = algs[2] = 0xff; | |
1446 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
1447 | algs[0] = WLAN_AUTH_OPEN; | |
1448 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
1449 | algs[1] = WLAN_AUTH_SHARED_KEY; | |
1450 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
1451 | algs[2] = WLAN_AUTH_LEAP; | |
1452 | if (ifsta->auth_alg == WLAN_AUTH_OPEN) | |
1453 | pos = 0; | |
1454 | else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY) | |
1455 | pos = 1; | |
1456 | else | |
1457 | pos = 2; | |
1458 | for (i = 0; i < num_algs; i++) { | |
1459 | pos++; | |
1460 | if (pos >= num_algs) | |
1461 | pos = 0; | |
1462 | if (algs[pos] == ifsta->auth_alg || | |
1463 | algs[pos] == 0xff) | |
1464 | continue; | |
1465 | if (algs[pos] == WLAN_AUTH_SHARED_KEY && | |
f698d856 | 1466 | !ieee80211_sta_wep_configured(sdata)) |
f0706e82 JB |
1467 | continue; |
1468 | ifsta->auth_alg = algs[pos]; | |
f0706e82 JB |
1469 | break; |
1470 | } | |
1471 | } | |
1472 | return; | |
1473 | } | |
1474 | ||
1475 | switch (ifsta->auth_alg) { | |
1476 | case WLAN_AUTH_OPEN: | |
1477 | case WLAN_AUTH_LEAP: | |
f698d856 | 1478 | ieee80211_auth_completed(sdata, ifsta); |
f0706e82 JB |
1479 | break; |
1480 | case WLAN_AUTH_SHARED_KEY: | |
1481 | if (ifsta->auth_transaction == 4) | |
f698d856 | 1482 | ieee80211_auth_completed(sdata, ifsta); |
f0706e82 | 1483 | else |
f698d856 | 1484 | ieee80211_auth_challenge(sdata, ifsta, mgmt, len); |
f0706e82 JB |
1485 | break; |
1486 | } | |
1487 | } | |
1488 | ||
1489 | ||
f698d856 | 1490 | static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1491 | struct ieee80211_if_sta *ifsta, |
1492 | struct ieee80211_mgmt *mgmt, | |
1493 | size_t len) | |
1494 | { | |
1495 | u16 reason_code; | |
0795af57 | 1496 | DECLARE_MAC_BUF(mac); |
f0706e82 | 1497 | |
f4ea83dd | 1498 | if (len < 24 + 2) |
f0706e82 | 1499 | return; |
f0706e82 | 1500 | |
f4ea83dd | 1501 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1502 | return; |
f0706e82 JB |
1503 | |
1504 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
1505 | ||
988c0f72 | 1506 | if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) |
f698d856 | 1507 | printk(KERN_DEBUG "%s: deauthenticated\n", sdata->dev->name); |
f0706e82 | 1508 | |
48c2fc59 TW |
1509 | if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE || |
1510 | ifsta->state == IEEE80211_STA_MLME_ASSOCIATE || | |
1511 | ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) { | |
9859b81e | 1512 | ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
f0706e82 JB |
1513 | mod_timer(&ifsta->timer, jiffies + |
1514 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1515 | } | |
1516 | ||
aa458d17 | 1517 | ieee80211_set_disassoc(sdata, ifsta, true, false, 0); |
d6f2da5b | 1518 | ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED; |
f0706e82 JB |
1519 | } |
1520 | ||
1521 | ||
f698d856 | 1522 | static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1523 | struct ieee80211_if_sta *ifsta, |
1524 | struct ieee80211_mgmt *mgmt, | |
1525 | size_t len) | |
1526 | { | |
1527 | u16 reason_code; | |
0795af57 | 1528 | DECLARE_MAC_BUF(mac); |
f0706e82 | 1529 | |
f4ea83dd | 1530 | if (len < 24 + 2) |
f0706e82 | 1531 | return; |
f0706e82 | 1532 | |
f4ea83dd | 1533 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1534 | return; |
f0706e82 JB |
1535 | |
1536 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
1537 | ||
d6f2da5b | 1538 | if (ifsta->flags & IEEE80211_STA_ASSOCIATED) |
f698d856 | 1539 | printk(KERN_DEBUG "%s: disassociated\n", sdata->dev->name); |
f0706e82 | 1540 | |
48c2fc59 TW |
1541 | if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) { |
1542 | ifsta->state = IEEE80211_STA_MLME_ASSOCIATE; | |
f0706e82 JB |
1543 | mod_timer(&ifsta->timer, jiffies + |
1544 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1545 | } | |
1546 | ||
aa458d17 | 1547 | ieee80211_set_disassoc(sdata, ifsta, false, false, 0); |
f0706e82 JB |
1548 | } |
1549 | ||
1550 | ||
471b3efd | 1551 | static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1552 | struct ieee80211_if_sta *ifsta, |
1553 | struct ieee80211_mgmt *mgmt, | |
1554 | size_t len, | |
1555 | int reassoc) | |
1556 | { | |
471b3efd | 1557 | struct ieee80211_local *local = sdata->local; |
8318d78a | 1558 | struct ieee80211_supported_band *sband; |
f0706e82 | 1559 | struct sta_info *sta; |
8318d78a | 1560 | u64 rates, basic_rates; |
f0706e82 JB |
1561 | u16 capab_info, status_code, aid; |
1562 | struct ieee802_11_elems elems; | |
471b3efd | 1563 | struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf; |
f0706e82 JB |
1564 | u8 *pos; |
1565 | int i, j; | |
0795af57 | 1566 | DECLARE_MAC_BUF(mac); |
8318d78a | 1567 | bool have_higher_than_11mbit = false; |
f0706e82 JB |
1568 | |
1569 | /* AssocResp and ReassocResp have identical structure, so process both | |
1570 | * of them in this function. */ | |
1571 | ||
48c2fc59 | 1572 | if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE) |
f0706e82 | 1573 | return; |
f0706e82 | 1574 | |
f4ea83dd | 1575 | if (len < 24 + 6) |
f0706e82 | 1576 | return; |
f0706e82 | 1577 | |
f4ea83dd | 1578 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1579 | return; |
f0706e82 JB |
1580 | |
1581 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
1582 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
1583 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
f0706e82 | 1584 | |
0795af57 | 1585 | printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x " |
f0706e82 | 1586 | "status=%d aid=%d)\n", |
f698d856 | 1587 | sdata->dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa), |
ddd68587 | 1588 | capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); |
f0706e82 JB |
1589 | |
1590 | if (status_code != WLAN_STATUS_SUCCESS) { | |
1591 | printk(KERN_DEBUG "%s: AP denied association (code=%d)\n", | |
f698d856 | 1592 | sdata->dev->name, status_code); |
8a69aa93 DD |
1593 | /* if this was a reassociation, ensure we try a "full" |
1594 | * association next time. This works around some broken APs | |
1595 | * which do not correctly reject reassociation requests. */ | |
d6f2da5b | 1596 | ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
f0706e82 JB |
1597 | return; |
1598 | } | |
1599 | ||
1dd84aa2 JB |
1600 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
1601 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " | |
f698d856 | 1602 | "set\n", sdata->dev->name, aid); |
1dd84aa2 JB |
1603 | aid &= ~(BIT(15) | BIT(14)); |
1604 | ||
f0706e82 | 1605 | pos = mgmt->u.assoc_resp.variable; |
67a4cce4 | 1606 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
f0706e82 JB |
1607 | |
1608 | if (!elems.supp_rates) { | |
1609 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", | |
f698d856 | 1610 | sdata->dev->name); |
f0706e82 JB |
1611 | return; |
1612 | } | |
1613 | ||
f698d856 | 1614 | printk(KERN_DEBUG "%s: associated\n", sdata->dev->name); |
f0706e82 JB |
1615 | ifsta->aid = aid; |
1616 | ifsta->ap_capab = capab_info; | |
1617 | ||
1618 | kfree(ifsta->assocresp_ies); | |
1619 | ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt); | |
0ec0b7ac | 1620 | ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL); |
f0706e82 JB |
1621 | if (ifsta->assocresp_ies) |
1622 | memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len); | |
1623 | ||
d0709a65 JB |
1624 | rcu_read_lock(); |
1625 | ||
f0706e82 JB |
1626 | /* Add STA entry for the AP */ |
1627 | sta = sta_info_get(local, ifsta->bssid); | |
1628 | if (!sta) { | |
1629 | struct ieee80211_sta_bss *bss; | |
73651ee6 | 1630 | int err; |
d0709a65 | 1631 | |
73651ee6 JB |
1632 | sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC); |
1633 | if (!sta) { | |
1634 | printk(KERN_DEBUG "%s: failed to alloc STA entry for" | |
f698d856 | 1635 | " the AP\n", sdata->dev->name); |
d0709a65 | 1636 | rcu_read_unlock(); |
f0706e82 JB |
1637 | return; |
1638 | } | |
60f8b39c JB |
1639 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
1640 | local->hw.conf.channel->center_freq, | |
1641 | ifsta->ssid, ifsta->ssid_len); | |
1642 | if (bss) { | |
1643 | sta->last_signal = bss->signal; | |
1644 | sta->last_qual = bss->qual; | |
1645 | sta->last_noise = bss->noise; | |
1646 | ieee80211_rx_bss_put(local, bss); | |
1647 | } | |
f709fc69 | 1648 | |
60f8b39c JB |
1649 | err = sta_info_insert(sta); |
1650 | if (err) { | |
1651 | printk(KERN_DEBUG "%s: failed to insert STA entry for" | |
1652 | " the AP (error %d)\n", sdata->dev->name, err); | |
1653 | rcu_read_unlock(); | |
1654 | return; | |
f709fc69 | 1655 | } |
60f8b39c JB |
1656 | /* update new sta with its last rx activity */ |
1657 | sta->last_rx = jiffies; | |
f709fc69 | 1658 | } |
f709fc69 | 1659 | |
60f8b39c JB |
1660 | /* |
1661 | * FIXME: Do we really need to update the sta_info's information here? | |
1662 | * We already know about the AP (we found it in our list) so it | |
1663 | * should already be filled with the right info, no? | |
1664 | * As is stands, all this is racy because typically we assume | |
1665 | * the information that is filled in here (except flags) doesn't | |
1666 | * change while a STA structure is alive. As such, it should move | |
1667 | * to between the sta_info_alloc() and sta_info_insert() above. | |
1668 | */ | |
f709fc69 | 1669 | |
60f8b39c JB |
1670 | set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP | |
1671 | WLAN_STA_AUTHORIZED); | |
05e5e883 | 1672 | |
60f8b39c JB |
1673 | rates = 0; |
1674 | basic_rates = 0; | |
1675 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
f709fc69 | 1676 | |
60f8b39c JB |
1677 | for (i = 0; i < elems.supp_rates_len; i++) { |
1678 | int rate = (elems.supp_rates[i] & 0x7f) * 5; | |
f709fc69 | 1679 | |
60f8b39c JB |
1680 | if (rate > 110) |
1681 | have_higher_than_11mbit = true; | |
1682 | ||
1683 | for (j = 0; j < sband->n_bitrates; j++) { | |
1684 | if (sband->bitrates[j].bitrate == rate) | |
1685 | rates |= BIT(j); | |
1686 | if (elems.supp_rates[i] & 0x80) | |
1687 | basic_rates |= BIT(j); | |
f709fc69 | 1688 | } |
f709fc69 LCC |
1689 | } |
1690 | ||
60f8b39c JB |
1691 | for (i = 0; i < elems.ext_supp_rates_len; i++) { |
1692 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; | |
f0706e82 | 1693 | |
60f8b39c JB |
1694 | if (rate > 110) |
1695 | have_higher_than_11mbit = true; | |
f0706e82 | 1696 | |
60f8b39c JB |
1697 | for (j = 0; j < sband->n_bitrates; j++) { |
1698 | if (sband->bitrates[j].bitrate == rate) | |
1699 | rates |= BIT(j); | |
1700 | if (elems.ext_supp_rates[i] & 0x80) | |
1701 | basic_rates |= BIT(j); | |
1702 | } | |
1ebebea8 | 1703 | } |
f0706e82 | 1704 | |
60f8b39c JB |
1705 | sta->supp_rates[local->hw.conf.channel->band] = rates; |
1706 | sdata->basic_rates = basic_rates; | |
1707 | ||
1708 | /* cf. IEEE 802.11 9.2.12 */ | |
1709 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
1710 | have_higher_than_11mbit) | |
1711 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
1712 | else | |
1713 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
f0706e82 | 1714 | |
60f8b39c JB |
1715 | if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param && |
1716 | (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) { | |
1717 | struct ieee80211_ht_bss_info bss_info; | |
1718 | ieee80211_ht_cap_ie_to_ht_info( | |
1719 | (struct ieee80211_ht_cap *) | |
1720 | elems.ht_cap_elem, &sta->ht_info); | |
1721 | ieee80211_ht_addt_info_ie_to_ht_bss_info( | |
1722 | (struct ieee80211_ht_addt_info *) | |
1723 | elems.ht_info_elem, &bss_info); | |
1724 | ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info); | |
1725 | } | |
f0706e82 | 1726 | |
60f8b39c | 1727 | rate_control_rate_init(sta, local); |
f0706e82 | 1728 | |
60f8b39c JB |
1729 | if (elems.wmm_param) { |
1730 | set_sta_flags(sta, WLAN_STA_WME); | |
1731 | rcu_read_unlock(); | |
1732 | ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param, | |
1733 | elems.wmm_param_len); | |
1734 | } else | |
1735 | rcu_read_unlock(); | |
f0706e82 | 1736 | |
60f8b39c JB |
1737 | /* set AID and assoc capability, |
1738 | * ieee80211_set_associated() will tell the driver */ | |
1739 | bss_conf->aid = aid; | |
1740 | bss_conf->assoc_capability = capab_info; | |
1741 | ieee80211_set_associated(sdata, ifsta); | |
f0706e82 | 1742 | |
60f8b39c | 1743 | ieee80211_associated(sdata, ifsta); |
f0706e82 JB |
1744 | } |
1745 | ||
1746 | ||
f698d856 | 1747 | static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, |
a607268a BR |
1748 | struct ieee80211_if_sta *ifsta, |
1749 | struct ieee80211_sta_bss *bss) | |
1750 | { | |
f698d856 | 1751 | struct ieee80211_local *local = sdata->local; |
a607268a BR |
1752 | int res, rates, i, j; |
1753 | struct sk_buff *skb; | |
1754 | struct ieee80211_mgmt *mgmt; | |
a607268a | 1755 | u8 *pos; |
a607268a | 1756 | struct ieee80211_supported_band *sband; |
507b06d0 | 1757 | union iwreq_data wrqu; |
a607268a BR |
1758 | |
1759 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1760 | ||
1761 | /* Remove possible STA entries from other IBSS networks. */ | |
dc6676b7 | 1762 | sta_info_flush_delayed(sdata); |
a607268a BR |
1763 | |
1764 | if (local->ops->reset_tsf) { | |
1765 | /* Reset own TSF to allow time synchronization work. */ | |
1766 | local->ops->reset_tsf(local_to_hw(local)); | |
1767 | } | |
1768 | memcpy(ifsta->bssid, bss->bssid, ETH_ALEN); | |
9d139c81 | 1769 | res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID); |
a607268a BR |
1770 | if (res) |
1771 | return res; | |
1772 | ||
1773 | local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10; | |
1774 | ||
a607268a BR |
1775 | sdata->drop_unencrypted = bss->capability & |
1776 | WLAN_CAPABILITY_PRIVACY ? 1 : 0; | |
1777 | ||
f698d856 | 1778 | res = ieee80211_set_freq(sdata, bss->freq); |
a607268a | 1779 | |
be038b37 AK |
1780 | if (res) |
1781 | return res; | |
a607268a | 1782 | |
9d139c81 | 1783 | /* Build IBSS probe response */ |
a607268a | 1784 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400); |
9d139c81 | 1785 | if (skb) { |
a607268a BR |
1786 | skb_reserve(skb, local->hw.extra_tx_headroom); |
1787 | ||
1788 | mgmt = (struct ieee80211_mgmt *) | |
1789 | skb_put(skb, 24 + sizeof(mgmt->u.beacon)); | |
1790 | memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon)); | |
e7827a70 HH |
1791 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
1792 | IEEE80211_STYPE_PROBE_RESP); | |
a607268a | 1793 | memset(mgmt->da, 0xff, ETH_ALEN); |
f698d856 | 1794 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
a607268a BR |
1795 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); |
1796 | mgmt->u.beacon.beacon_int = | |
1797 | cpu_to_le16(local->hw.conf.beacon_int); | |
4faeb860 | 1798 | mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp); |
a607268a BR |
1799 | mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability); |
1800 | ||
1801 | pos = skb_put(skb, 2 + ifsta->ssid_len); | |
1802 | *pos++ = WLAN_EID_SSID; | |
1803 | *pos++ = ifsta->ssid_len; | |
1804 | memcpy(pos, ifsta->ssid, ifsta->ssid_len); | |
1805 | ||
1806 | rates = bss->supp_rates_len; | |
1807 | if (rates > 8) | |
1808 | rates = 8; | |
1809 | pos = skb_put(skb, 2 + rates); | |
1810 | *pos++ = WLAN_EID_SUPP_RATES; | |
1811 | *pos++ = rates; | |
1812 | memcpy(pos, bss->supp_rates, rates); | |
1813 | ||
1814 | if (bss->band == IEEE80211_BAND_2GHZ) { | |
1815 | pos = skb_put(skb, 2 + 1); | |
1816 | *pos++ = WLAN_EID_DS_PARAMS; | |
1817 | *pos++ = 1; | |
1818 | *pos++ = ieee80211_frequency_to_channel(bss->freq); | |
1819 | } | |
1820 | ||
1821 | pos = skb_put(skb, 2 + 2); | |
1822 | *pos++ = WLAN_EID_IBSS_PARAMS; | |
1823 | *pos++ = 2; | |
1824 | /* FIX: set ATIM window based on scan results */ | |
1825 | *pos++ = 0; | |
1826 | *pos++ = 0; | |
1827 | ||
1828 | if (bss->supp_rates_len > 8) { | |
1829 | rates = bss->supp_rates_len - 8; | |
1830 | pos = skb_put(skb, 2 + rates); | |
1831 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
1832 | *pos++ = rates; | |
1833 | memcpy(pos, &bss->supp_rates[8], rates); | |
1834 | } | |
1835 | ||
9d139c81 | 1836 | ifsta->probe_resp = skb; |
e039fa4a | 1837 | |
9d139c81 JB |
1838 | ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON); |
1839 | } | |
a607268a | 1840 | |
9d139c81 JB |
1841 | rates = 0; |
1842 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1843 | for (i = 0; i < bss->supp_rates_len; i++) { | |
1844 | int bitrate = (bss->supp_rates[i] & 0x7f) * 5; | |
1845 | for (j = 0; j < sband->n_bitrates; j++) | |
1846 | if (sband->bitrates[j].bitrate == bitrate) | |
1847 | rates |= BIT(j); | |
a607268a | 1848 | } |
9d139c81 JB |
1849 | ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates; |
1850 | ||
b079ada7 | 1851 | ieee80211_sta_def_wmm_params(sdata, bss); |
a607268a | 1852 | |
48c2fc59 | 1853 | ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED; |
a607268a BR |
1854 | mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); |
1855 | ||
507b06d0 DW |
1856 | memset(&wrqu, 0, sizeof(wrqu)); |
1857 | memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN); | |
f698d856 | 1858 | wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL); |
a607268a BR |
1859 | |
1860 | return res; | |
1861 | } | |
1862 | ||
f709fc69 LCC |
1863 | u64 ieee80211_sta_get_rates(struct ieee80211_local *local, |
1864 | struct ieee802_11_elems *elems, | |
1865 | enum ieee80211_band band) | |
1866 | { | |
1867 | struct ieee80211_supported_band *sband; | |
1868 | struct ieee80211_rate *bitrates; | |
1869 | size_t num_rates; | |
1870 | u64 supp_rates; | |
1871 | int i, j; | |
1872 | sband = local->hw.wiphy->bands[band]; | |
1873 | ||
1874 | if (!sband) { | |
1875 | WARN_ON(1); | |
1876 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1877 | } | |
1878 | ||
1879 | bitrates = sband->bitrates; | |
1880 | num_rates = sband->n_bitrates; | |
1881 | supp_rates = 0; | |
1882 | for (i = 0; i < elems->supp_rates_len + | |
1883 | elems->ext_supp_rates_len; i++) { | |
1884 | u8 rate = 0; | |
1885 | int own_rate; | |
1886 | if (i < elems->supp_rates_len) | |
1887 | rate = elems->supp_rates[i]; | |
1888 | else if (elems->ext_supp_rates) | |
1889 | rate = elems->ext_supp_rates | |
1890 | [i - elems->supp_rates_len]; | |
1891 | own_rate = 5 * (rate & 0x7f); | |
1892 | for (j = 0; j < num_rates; j++) | |
1893 | if (bitrates[j].bitrate == own_rate) | |
1894 | supp_rates |= BIT(j); | |
1895 | } | |
1896 | return supp_rates; | |
1897 | } | |
1898 | ||
8e1535d5 EG |
1899 | static u64 ieee80211_sta_get_mandatory_rates(struct ieee80211_local *local, |
1900 | enum ieee80211_band band) | |
1901 | { | |
1902 | struct ieee80211_supported_band *sband; | |
1903 | struct ieee80211_rate *bitrates; | |
1904 | u64 mandatory_rates; | |
1905 | enum ieee80211_rate_flags mandatory_flag; | |
1906 | int i; | |
1907 | ||
1908 | sband = local->hw.wiphy->bands[band]; | |
1909 | if (!sband) { | |
1910 | WARN_ON(1); | |
1911 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1912 | } | |
1913 | ||
1914 | if (band == IEEE80211_BAND_2GHZ) | |
1915 | mandatory_flag = IEEE80211_RATE_MANDATORY_B; | |
1916 | else | |
1917 | mandatory_flag = IEEE80211_RATE_MANDATORY_A; | |
1918 | ||
1919 | bitrates = sband->bitrates; | |
1920 | mandatory_rates = 0; | |
1921 | for (i = 0; i < sband->n_bitrates; i++) | |
1922 | if (bitrates[i].flags & mandatory_flag) | |
1923 | mandatory_rates |= BIT(i); | |
1924 | return mandatory_rates; | |
1925 | } | |
a607268a | 1926 | |
98c8fccf JB |
1927 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
1928 | struct ieee80211_mgmt *mgmt, | |
1929 | size_t len, | |
1930 | struct ieee80211_rx_status *rx_status, | |
1931 | struct ieee802_11_elems *elems, | |
1932 | bool beacon) | |
1933 | { | |
1934 | struct ieee80211_local *local = sdata->local; | |
1935 | int freq; | |
1936 | struct ieee80211_sta_bss *bss; | |
1937 | struct sta_info *sta; | |
1938 | struct ieee80211_channel *channel; | |
1939 | u64 beacon_timestamp, rx_timestamp; | |
1940 | u64 supp_rates = 0; | |
1941 | enum ieee80211_band band = rx_status->band; | |
1942 | DECLARE_MAC_BUF(mac); | |
1943 | DECLARE_MAC_BUF(mac2); | |
1944 | ||
1945 | if (elems->ds_params && elems->ds_params_len == 1) | |
1946 | freq = ieee80211_channel_to_frequency(elems->ds_params[0]); | |
1947 | else | |
1948 | freq = rx_status->freq; | |
1949 | ||
1950 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
1951 | ||
1952 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
1953 | return; | |
1954 | ||
1955 | if (ieee80211_vif_is_mesh(&sdata->vif) && elems->mesh_id && | |
1956 | elems->mesh_config && mesh_matches_local(elems, sdata)) { | |
1957 | supp_rates = ieee80211_sta_get_rates(local, elems, band); | |
1958 | ||
1959 | mesh_neighbour_update(mgmt->sa, supp_rates, sdata, | |
1960 | mesh_peer_accepts_plinks(elems)); | |
1961 | } | |
1962 | ||
1963 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems->supp_rates && | |
1964 | memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) { | |
1965 | supp_rates = ieee80211_sta_get_rates(local, elems, band); | |
1966 | ||
1967 | rcu_read_lock(); | |
1968 | ||
1969 | sta = sta_info_get(local, mgmt->sa); | |
1970 | if (sta) { | |
1971 | u64 prev_rates; | |
1972 | ||
1973 | prev_rates = sta->supp_rates[band]; | |
1974 | /* make sure mandatory rates are always added */ | |
1975 | sta->supp_rates[band] = supp_rates | | |
1976 | ieee80211_sta_get_mandatory_rates(local, band); | |
1977 | ||
1978 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
1979 | if (sta->supp_rates[band] != prev_rates) | |
1980 | printk(KERN_DEBUG "%s: updated supp_rates set " | |
1981 | "for %s based on beacon info (0x%llx | " | |
1982 | "0x%llx -> 0x%llx)\n", | |
1983 | sdata->dev->name, print_mac(mac, sta->addr), | |
1984 | (unsigned long long) prev_rates, | |
1985 | (unsigned long long) supp_rates, | |
1986 | (unsigned long long) sta->supp_rates[band]); | |
1987 | #endif | |
1988 | } else { | |
1989 | ieee80211_ibss_add_sta(sdata, NULL, mgmt->bssid, | |
1990 | mgmt->sa, supp_rates); | |
1991 | } | |
1992 | ||
1993 | rcu_read_unlock(); | |
1994 | } | |
1995 | ||
1996 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, | |
1997 | freq, beacon); | |
1998 | if (!bss) | |
1999 | return; | |
2000 | ||
2001 | /* was just updated in ieee80211_bss_info_update */ | |
2002 | beacon_timestamp = bss->timestamp; | |
2003 | ||
30b89b0f JB |
2004 | /* |
2005 | * In STA mode, the remaining parameters should not be overridden | |
2006 | * by beacons because they're not necessarily accurate there. | |
2007 | */ | |
2008 | if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS && | |
9859b81e | 2009 | bss->last_probe_resp && beacon) { |
3e122be0 | 2010 | ieee80211_rx_bss_put(local, bss); |
30b89b0f JB |
2011 | return; |
2012 | } | |
2013 | ||
9d9bf77d BR |
2014 | /* check if we need to merge IBSS */ |
2015 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon && | |
fba4a1e6 | 2016 | bss->capability & WLAN_CAPABILITY_IBSS && |
9d9bf77d | 2017 | bss->freq == local->oper_channel->center_freq && |
ae6a44e3 EK |
2018 | elems->ssid_len == sdata->u.sta.ssid_len && |
2019 | memcmp(elems->ssid, sdata->u.sta.ssid, | |
2020 | sdata->u.sta.ssid_len) == 0) { | |
9d9bf77d BR |
2021 | if (rx_status->flag & RX_FLAG_TSFT) { |
2022 | /* in order for correct IBSS merging we need mactime | |
2023 | * | |
2024 | * since mactime is defined as the time the first data | |
2025 | * symbol of the frame hits the PHY, and the timestamp | |
2026 | * of the beacon is defined as "the time that the data | |
2027 | * symbol containing the first bit of the timestamp is | |
2028 | * transmitted to the PHY plus the transmitting STA’s | |
2029 | * delays through its local PHY from the MAC-PHY | |
2030 | * interface to its interface with the WM" | |
2031 | * (802.11 11.1.2) - equals the time this bit arrives at | |
2032 | * the receiver - we have to take into account the | |
2033 | * offset between the two. | |
2034 | * e.g: at 1 MBit that means mactime is 192 usec earlier | |
2035 | * (=24 bytes * 8 usecs/byte) than the beacon timestamp. | |
2036 | */ | |
8e1535d5 | 2037 | int rate = local->hw.wiphy->bands[band]-> |
9d9bf77d BR |
2038 | bitrates[rx_status->rate_idx].bitrate; |
2039 | rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate); | |
2040 | } else if (local && local->ops && local->ops->get_tsf) | |
2041 | /* second best option: get current TSF */ | |
2042 | rx_timestamp = local->ops->get_tsf(local_to_hw(local)); | |
2043 | else | |
2044 | /* can't merge without knowing the TSF */ | |
2045 | rx_timestamp = -1LLU; | |
2046 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
2047 | printk(KERN_DEBUG "RX beacon SA=%s BSSID=" | |
2048 | "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n", | |
2049 | print_mac(mac, mgmt->sa), | |
2050 | print_mac(mac2, mgmt->bssid), | |
2051 | (unsigned long long)rx_timestamp, | |
2052 | (unsigned long long)beacon_timestamp, | |
2053 | (unsigned long long)(rx_timestamp - beacon_timestamp), | |
2054 | jiffies); | |
2055 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
2056 | if (beacon_timestamp > rx_timestamp) { | |
576fdeae | 2057 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
f4ea83dd JB |
2058 | printk(KERN_DEBUG "%s: beacon TSF higher than " |
2059 | "local TSF - IBSS merge with BSSID %s\n", | |
f698d856 | 2060 | sdata->dev->name, print_mac(mac, mgmt->bssid)); |
fba4a1e6 | 2061 | #endif |
f698d856 JBG |
2062 | ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss); |
2063 | ieee80211_ibss_add_sta(sdata, NULL, | |
87291c02 | 2064 | mgmt->bssid, mgmt->sa, |
8e1535d5 | 2065 | supp_rates); |
9d9bf77d BR |
2066 | } |
2067 | } | |
2068 | ||
3e122be0 | 2069 | ieee80211_rx_bss_put(local, bss); |
f0706e82 JB |
2070 | } |
2071 | ||
2072 | ||
f698d856 | 2073 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2074 | struct ieee80211_mgmt *mgmt, |
2075 | size_t len, | |
2076 | struct ieee80211_rx_status *rx_status) | |
2077 | { | |
ae6a44e3 EK |
2078 | size_t baselen; |
2079 | struct ieee802_11_elems elems; | |
9859b81e | 2080 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
ae6a44e3 | 2081 | |
8e7cdbb6 TW |
2082 | if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN)) |
2083 | return; /* ignore ProbeResp to foreign address */ | |
2084 | ||
ae6a44e3 EK |
2085 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
2086 | if (baselen > len) | |
2087 | return; | |
2088 | ||
2089 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
2090 | &elems); | |
2091 | ||
98c8fccf | 2092 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false); |
9859b81e RR |
2093 | |
2094 | /* direct probe may be part of the association flow */ | |
2095 | if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE, | |
2096 | &ifsta->request)) { | |
2097 | printk(KERN_DEBUG "%s direct probe responded\n", | |
2098 | sdata->dev->name); | |
2099 | ieee80211_authenticate(sdata, ifsta); | |
2100 | } | |
f0706e82 JB |
2101 | } |
2102 | ||
2103 | ||
f698d856 | 2104 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2105 | struct ieee80211_mgmt *mgmt, |
2106 | size_t len, | |
2107 | struct ieee80211_rx_status *rx_status) | |
2108 | { | |
f0706e82 | 2109 | struct ieee80211_if_sta *ifsta; |
f0706e82 JB |
2110 | size_t baselen; |
2111 | struct ieee802_11_elems elems; | |
f698d856 | 2112 | struct ieee80211_local *local = sdata->local; |
d3c990fb | 2113 | struct ieee80211_conf *conf = &local->hw.conf; |
471b3efd | 2114 | u32 changed = 0; |
f0706e82 | 2115 | |
ae6a44e3 EK |
2116 | /* Process beacon from the current BSS */ |
2117 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
2118 | if (baselen > len) | |
2119 | return; | |
2120 | ||
2121 | ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems); | |
2122 | ||
98c8fccf | 2123 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true); |
f0706e82 | 2124 | |
51fb61e7 | 2125 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
f0706e82 JB |
2126 | return; |
2127 | ifsta = &sdata->u.sta; | |
2128 | ||
d6f2da5b | 2129 | if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) || |
f0706e82 JB |
2130 | memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) |
2131 | return; | |
2132 | ||
fe3fa827 JB |
2133 | ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param, |
2134 | elems.wmm_param_len); | |
2135 | ||
5628221c | 2136 | if (elems.erp_info && elems.erp_info_len >= 1) |
471b3efd | 2137 | changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]); |
50c4afb9 JL |
2138 | else { |
2139 | u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info); | |
2140 | changed |= ieee80211_handle_protect_preamb(sdata, false, | |
2141 | (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0); | |
2142 | } | |
f0706e82 | 2143 | |
d3c990fb | 2144 | if (elems.ht_cap_elem && elems.ht_info_elem && |
38668c05 | 2145 | elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) { |
d3c990fb RR |
2146 | struct ieee80211_ht_bss_info bss_info; |
2147 | ||
2148 | ieee80211_ht_addt_info_ie_to_ht_bss_info( | |
2149 | (struct ieee80211_ht_addt_info *) | |
2150 | elems.ht_info_elem, &bss_info); | |
38668c05 TW |
2151 | changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf, |
2152 | &bss_info); | |
d3c990fb RR |
2153 | } |
2154 | ||
471b3efd | 2155 | ieee80211_bss_info_change_notify(sdata, changed); |
f0706e82 JB |
2156 | } |
2157 | ||
2158 | ||
f698d856 | 2159 | static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2160 | struct ieee80211_if_sta *ifsta, |
2161 | struct ieee80211_mgmt *mgmt, | |
2162 | size_t len, | |
2163 | struct ieee80211_rx_status *rx_status) | |
2164 | { | |
f698d856 | 2165 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
2166 | int tx_last_beacon; |
2167 | struct sk_buff *skb; | |
2168 | struct ieee80211_mgmt *resp; | |
2169 | u8 *pos, *end; | |
0795af57 JP |
2170 | DECLARE_MAC_BUF(mac); |
2171 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
2172 | DECLARE_MAC_BUF(mac2); | |
2173 | DECLARE_MAC_BUF(mac3); | |
2174 | #endif | |
f0706e82 | 2175 | |
51fb61e7 | 2176 | if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS || |
48c2fc59 | 2177 | ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED || |
f0706e82 JB |
2178 | len < 24 + 2 || !ifsta->probe_resp) |
2179 | return; | |
2180 | ||
2181 | if (local->ops->tx_last_beacon) | |
2182 | tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local)); | |
2183 | else | |
2184 | tx_last_beacon = 1; | |
2185 | ||
2186 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0795af57 JP |
2187 | printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID=" |
2188 | "%s (tx_last_beacon=%d)\n", | |
f698d856 | 2189 | sdata->dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da), |
0795af57 | 2190 | print_mac(mac3, mgmt->bssid), tx_last_beacon); |
f0706e82 JB |
2191 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
2192 | ||
2193 | if (!tx_last_beacon) | |
2194 | return; | |
2195 | ||
2196 | if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 && | |
2197 | memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0) | |
2198 | return; | |
2199 | ||
2200 | end = ((u8 *) mgmt) + len; | |
2201 | pos = mgmt->u.probe_req.variable; | |
2202 | if (pos[0] != WLAN_EID_SSID || | |
2203 | pos + 2 + pos[1] > end) { | |
f4ea83dd JB |
2204 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
2205 | printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq " | |
2206 | "from %s\n", | |
f698d856 | 2207 | sdata->dev->name, print_mac(mac, mgmt->sa)); |
f4ea83dd | 2208 | #endif |
f0706e82 JB |
2209 | return; |
2210 | } | |
2211 | if (pos[1] != 0 && | |
2212 | (pos[1] != ifsta->ssid_len || | |
2213 | memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) { | |
2214 | /* Ignore ProbeReq for foreign SSID */ | |
2215 | return; | |
2216 | } | |
2217 | ||
2218 | /* Reply with ProbeResp */ | |
0ec0b7ac | 2219 | skb = skb_copy(ifsta->probe_resp, GFP_KERNEL); |
f0706e82 JB |
2220 | if (!skb) |
2221 | return; | |
2222 | ||
2223 | resp = (struct ieee80211_mgmt *) skb->data; | |
2224 | memcpy(resp->da, mgmt->sa, ETH_ALEN); | |
2225 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0795af57 | 2226 | printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n", |
f698d856 | 2227 | sdata->dev->name, print_mac(mac, resp->da)); |
f0706e82 | 2228 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
f698d856 | 2229 | ieee80211_sta_tx(sdata, skb, 0); |
f0706e82 JB |
2230 | } |
2231 | ||
f698d856 | 2232 | static void ieee80211_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, |
4e20cb29 JB |
2233 | struct ieee80211_if_sta *ifsta, |
2234 | struct ieee80211_mgmt *mgmt, | |
f709fc69 LCC |
2235 | size_t len, |
2236 | struct ieee80211_rx_status *rx_status) | |
9f985b0e | 2237 | { |
f698d856 | 2238 | struct ieee80211_local *local = sdata->local; |
f709fc69 | 2239 | |
9c80d3dc JB |
2240 | /* all categories we currently handle have action_code */ |
2241 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
9f985b0e RR |
2242 | return; |
2243 | ||
2244 | switch (mgmt->u.action.category) { | |
b6623486 AK |
2245 | case WLAN_CATEGORY_SPECTRUM_MGMT: |
2246 | if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ) | |
2247 | break; | |
5fd12d4d | 2248 | switch (mgmt->u.action.u.measurement.action_code) { |
b6623486 AK |
2249 | case WLAN_ACTION_SPCT_MSR_REQ: |
2250 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2251 | sizeof(mgmt->u.action.u.measurement))) | |
2252 | break; | |
f698d856 | 2253 | ieee80211_sta_process_measurement_req(sdata, mgmt, len); |
b6623486 AK |
2254 | break; |
2255 | } | |
2256 | break; | |
9f985b0e RR |
2257 | case WLAN_CATEGORY_BACK: |
2258 | switch (mgmt->u.action.u.addba_req.action_code) { | |
2259 | case WLAN_ACTION_ADDBA_REQ: | |
2260 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2261 | sizeof(mgmt->u.action.u.addba_req))) | |
2262 | break; | |
f698d856 | 2263 | ieee80211_sta_process_addba_request(local, mgmt, len); |
9f985b0e | 2264 | break; |
eadc8d9e RR |
2265 | case WLAN_ACTION_ADDBA_RESP: |
2266 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2267 | sizeof(mgmt->u.action.u.addba_resp))) | |
2268 | break; | |
f698d856 | 2269 | ieee80211_sta_process_addba_resp(local, mgmt, len); |
eadc8d9e | 2270 | break; |
688b88a4 RR |
2271 | case WLAN_ACTION_DELBA: |
2272 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2273 | sizeof(mgmt->u.action.u.delba))) | |
2274 | break; | |
f698d856 | 2275 | ieee80211_sta_process_delba(sdata, mgmt, len); |
688b88a4 | 2276 | break; |
9f985b0e RR |
2277 | } |
2278 | break; | |
f709fc69 | 2279 | case PLINK_CATEGORY: |
902acc78 | 2280 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
f698d856 | 2281 | mesh_rx_plink_frame(sdata, mgmt, len, rx_status); |
f709fc69 | 2282 | break; |
f709fc69 | 2283 | case MESH_PATH_SEL_CATEGORY: |
902acc78 | 2284 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
f698d856 | 2285 | mesh_rx_path_sel_frame(sdata, mgmt, len); |
f709fc69 | 2286 | break; |
9f985b0e RR |
2287 | } |
2288 | } | |
f0706e82 | 2289 | |
f698d856 | 2290 | void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, |
f0706e82 JB |
2291 | struct ieee80211_rx_status *rx_status) |
2292 | { | |
f698d856 | 2293 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
2294 | struct ieee80211_if_sta *ifsta; |
2295 | struct ieee80211_mgmt *mgmt; | |
2296 | u16 fc; | |
2297 | ||
2298 | if (skb->len < 24) | |
2299 | goto fail; | |
2300 | ||
f0706e82 JB |
2301 | ifsta = &sdata->u.sta; |
2302 | ||
2303 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
2304 | fc = le16_to_cpu(mgmt->frame_control); | |
2305 | ||
2306 | switch (fc & IEEE80211_FCTL_STYPE) { | |
2307 | case IEEE80211_STYPE_PROBE_REQ: | |
2308 | case IEEE80211_STYPE_PROBE_RESP: | |
2309 | case IEEE80211_STYPE_BEACON: | |
f709fc69 | 2310 | case IEEE80211_STYPE_ACTION: |
f0706e82 JB |
2311 | memcpy(skb->cb, rx_status, sizeof(*rx_status)); |
2312 | case IEEE80211_STYPE_AUTH: | |
2313 | case IEEE80211_STYPE_ASSOC_RESP: | |
2314 | case IEEE80211_STYPE_REASSOC_RESP: | |
2315 | case IEEE80211_STYPE_DEAUTH: | |
2316 | case IEEE80211_STYPE_DISASSOC: | |
2317 | skb_queue_tail(&ifsta->skb_queue, skb); | |
2318 | queue_work(local->hw.workqueue, &ifsta->work); | |
2319 | return; | |
f0706e82 JB |
2320 | } |
2321 | ||
2322 | fail: | |
2323 | kfree_skb(skb); | |
2324 | } | |
2325 | ||
f698d856 | 2326 | static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2327 | struct sk_buff *skb) |
2328 | { | |
2329 | struct ieee80211_rx_status *rx_status; | |
f0706e82 JB |
2330 | struct ieee80211_if_sta *ifsta; |
2331 | struct ieee80211_mgmt *mgmt; | |
2332 | u16 fc; | |
2333 | ||
f0706e82 JB |
2334 | ifsta = &sdata->u.sta; |
2335 | ||
2336 | rx_status = (struct ieee80211_rx_status *) skb->cb; | |
2337 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
2338 | fc = le16_to_cpu(mgmt->frame_control); | |
2339 | ||
2340 | switch (fc & IEEE80211_FCTL_STYPE) { | |
2341 | case IEEE80211_STYPE_PROBE_REQ: | |
f698d856 | 2342 | ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len, |
f0706e82 JB |
2343 | rx_status); |
2344 | break; | |
2345 | case IEEE80211_STYPE_PROBE_RESP: | |
f698d856 | 2346 | ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status); |
f0706e82 JB |
2347 | break; |
2348 | case IEEE80211_STYPE_BEACON: | |
f698d856 | 2349 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); |
f0706e82 JB |
2350 | break; |
2351 | case IEEE80211_STYPE_AUTH: | |
f698d856 | 2352 | ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len); |
f0706e82 JB |
2353 | break; |
2354 | case IEEE80211_STYPE_ASSOC_RESP: | |
471b3efd | 2355 | ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0); |
f0706e82 JB |
2356 | break; |
2357 | case IEEE80211_STYPE_REASSOC_RESP: | |
471b3efd | 2358 | ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1); |
f0706e82 JB |
2359 | break; |
2360 | case IEEE80211_STYPE_DEAUTH: | |
f698d856 | 2361 | ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len); |
f0706e82 JB |
2362 | break; |
2363 | case IEEE80211_STYPE_DISASSOC: | |
f698d856 | 2364 | ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len); |
f0706e82 | 2365 | break; |
9f985b0e | 2366 | case IEEE80211_STYPE_ACTION: |
f698d856 | 2367 | ieee80211_rx_mgmt_action(sdata, ifsta, mgmt, skb->len, rx_status); |
9f985b0e | 2368 | break; |
f0706e82 JB |
2369 | } |
2370 | ||
2371 | kfree_skb(skb); | |
2372 | } | |
2373 | ||
2374 | ||
f698d856 | 2375 | static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 2376 | { |
f698d856 | 2377 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
2378 | int active = 0; |
2379 | struct sta_info *sta; | |
2380 | ||
d0709a65 JB |
2381 | rcu_read_lock(); |
2382 | ||
2383 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
2384 | if (sta->sdata == sdata && | |
f0706e82 JB |
2385 | time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL, |
2386 | jiffies)) { | |
2387 | active++; | |
2388 | break; | |
2389 | } | |
2390 | } | |
d0709a65 JB |
2391 | |
2392 | rcu_read_unlock(); | |
f0706e82 JB |
2393 | |
2394 | return active; | |
2395 | } | |
2396 | ||
2397 | ||
f698d856 | 2398 | static void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, unsigned long exp_time) |
f0706e82 | 2399 | { |
f698d856 | 2400 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 2401 | struct sta_info *sta, *tmp; |
be8755e1 | 2402 | LIST_HEAD(tmp_list); |
0795af57 | 2403 | DECLARE_MAC_BUF(mac); |
d0709a65 | 2404 | unsigned long flags; |
f0706e82 | 2405 | |
d0709a65 | 2406 | spin_lock_irqsave(&local->sta_lock, flags); |
f0706e82 | 2407 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) |
f709fc69 | 2408 | if (time_after(jiffies, sta->last_rx + exp_time)) { |
f4ea83dd | 2409 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
0795af57 | 2410 | printk(KERN_DEBUG "%s: expiring inactive STA %s\n", |
f698d856 | 2411 | sdata->dev->name, print_mac(mac, sta->addr)); |
f4ea83dd | 2412 | #endif |
cb585bcc | 2413 | __sta_info_unlink(&sta); |
d0709a65 JB |
2414 | if (sta) |
2415 | list_add(&sta->list, &tmp_list); | |
f0706e82 | 2416 | } |
d0709a65 | 2417 | spin_unlock_irqrestore(&local->sta_lock, flags); |
be8755e1 | 2418 | |
d0709a65 JB |
2419 | list_for_each_entry_safe(sta, tmp, &tmp_list, list) |
2420 | sta_info_destroy(sta); | |
f0706e82 JB |
2421 | } |
2422 | ||
2423 | ||
f698d856 | 2424 | static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2425 | struct ieee80211_if_sta *ifsta) |
2426 | { | |
2427 | mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); | |
2428 | ||
f698d856 JBG |
2429 | ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT); |
2430 | if (ieee80211_sta_active_ibss(sdata)) | |
f0706e82 JB |
2431 | return; |
2432 | ||
2433 | printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other " | |
f698d856 JBG |
2434 | "IBSS networks with same SSID (merge)\n", sdata->dev->name); |
2435 | ieee80211_sta_req_scan(sdata, ifsta->ssid, ifsta->ssid_len); | |
f0706e82 JB |
2436 | } |
2437 | ||
2438 | ||
f709fc69 | 2439 | #ifdef CONFIG_MAC80211_MESH |
f698d856 | 2440 | static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata, |
f709fc69 LCC |
2441 | struct ieee80211_if_sta *ifsta) |
2442 | { | |
f709fc69 LCC |
2443 | bool free_plinks; |
2444 | ||
f698d856 JBG |
2445 | ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT); |
2446 | mesh_path_expire(sdata); | |
f709fc69 LCC |
2447 | |
2448 | free_plinks = mesh_plink_availables(sdata); | |
2449 | if (free_plinks != sdata->u.sta.accepting_plinks) | |
9d139c81 | 2450 | ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON); |
f709fc69 LCC |
2451 | |
2452 | mod_timer(&ifsta->timer, jiffies + | |
2453 | IEEE80211_MESH_HOUSEKEEPING_INTERVAL); | |
2454 | } | |
2455 | ||
2456 | ||
f698d856 | 2457 | void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) |
f709fc69 LCC |
2458 | { |
2459 | struct ieee80211_if_sta *ifsta; | |
f709fc69 | 2460 | ifsta = &sdata->u.sta; |
48c2fc59 | 2461 | ifsta->state = IEEE80211_STA_MLME_MESH_UP; |
f709fc69 | 2462 | ieee80211_sta_timer((unsigned long)sdata); |
56a6d13d | 2463 | ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON); |
f709fc69 LCC |
2464 | } |
2465 | #endif | |
2466 | ||
2467 | ||
f0706e82 JB |
2468 | void ieee80211_sta_timer(unsigned long data) |
2469 | { | |
60f8b39c JB |
2470 | struct ieee80211_sub_if_data *sdata = |
2471 | (struct ieee80211_sub_if_data *) data; | |
2472 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
2473 | struct ieee80211_local *local = sdata->local; | |
f0706e82 | 2474 | |
60f8b39c JB |
2475 | set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); |
2476 | queue_work(local->hw.workqueue, &ifsta->work); | |
f0706e82 JB |
2477 | } |
2478 | ||
f698d856 | 2479 | static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2480 | struct ieee80211_if_sta *ifsta) |
2481 | { | |
f698d856 | 2482 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
2483 | |
2484 | if (local->ops->reset_tsf) { | |
2485 | /* Reset own TSF to allow time synchronization work. */ | |
2486 | local->ops->reset_tsf(local_to_hw(local)); | |
2487 | } | |
2488 | ||
2489 | ifsta->wmm_last_param_set = -1; /* allow any WMM update */ | |
2490 | ||
2491 | ||
2492 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
2493 | ifsta->auth_alg = WLAN_AUTH_OPEN; | |
2494 | else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
2495 | ifsta->auth_alg = WLAN_AUTH_SHARED_KEY; | |
2496 | else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
2497 | ifsta->auth_alg = WLAN_AUTH_LEAP; | |
2498 | else | |
2499 | ifsta->auth_alg = WLAN_AUTH_OPEN; | |
f0706e82 | 2500 | ifsta->auth_transaction = -1; |
d6f2da5b | 2501 | ifsta->flags &= ~IEEE80211_STA_ASSOCIATED; |
6042a3e3 | 2502 | ifsta->assoc_scan_tries = 0; |
9859b81e | 2503 | ifsta->direct_probe_tries = 0; |
6042a3e3 RR |
2504 | ifsta->auth_tries = 0; |
2505 | ifsta->assoc_tries = 0; | |
24e64622 | 2506 | netif_tx_stop_all_queues(sdata->dev); |
f698d856 | 2507 | netif_carrier_off(sdata->dev); |
f0706e82 JB |
2508 | } |
2509 | ||
2510 | ||
f698d856 | 2511 | void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2512 | struct ieee80211_if_sta *ifsta) |
2513 | { | |
f698d856 | 2514 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 2515 | |
51fb61e7 | 2516 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
f0706e82 JB |
2517 | return; |
2518 | ||
d6f2da5b | 2519 | if ((ifsta->flags & (IEEE80211_STA_BSSID_SET | |
3b7ee69d | 2520 | IEEE80211_STA_AUTO_BSSID_SEL)) && |
d6f2da5b | 2521 | (ifsta->flags & (IEEE80211_STA_SSID_SET | |
3b7ee69d TW |
2522 | IEEE80211_STA_AUTO_SSID_SEL))) { |
2523 | ||
2524 | if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) | |
2525 | ieee80211_set_disassoc(sdata, ifsta, true, true, | |
2526 | WLAN_REASON_DEAUTH_LEAVING); | |
2527 | ||
f0706e82 JB |
2528 | set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); |
2529 | queue_work(local->hw.workqueue, &ifsta->work); | |
2530 | } | |
2531 | } | |
2532 | ||
2533 | static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta, | |
2534 | const char *ssid, int ssid_len) | |
2535 | { | |
2536 | int tmp, hidden_ssid; | |
2537 | ||
48225709 MW |
2538 | if (ssid_len == ifsta->ssid_len && |
2539 | !memcmp(ifsta->ssid, ssid, ssid_len)) | |
f0706e82 JB |
2540 | return 1; |
2541 | ||
d6f2da5b | 2542 | if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) |
f0706e82 JB |
2543 | return 0; |
2544 | ||
2545 | hidden_ssid = 1; | |
2546 | tmp = ssid_len; | |
2547 | while (tmp--) { | |
2548 | if (ssid[tmp] != '\0') { | |
2549 | hidden_ssid = 0; | |
2550 | break; | |
2551 | } | |
2552 | } | |
2553 | ||
2554 | if (hidden_ssid && ifsta->ssid_len == ssid_len) | |
2555 | return 1; | |
2556 | ||
2557 | if (ssid_len == 1 && ssid[0] == ' ') | |
2558 | return 1; | |
2559 | ||
2560 | return 0; | |
2561 | } | |
2562 | ||
f698d856 | 2563 | static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2564 | struct ieee80211_if_sta *ifsta) |
2565 | { | |
f698d856 | 2566 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 2567 | struct ieee80211_sta_bss *bss; |
8318d78a | 2568 | struct ieee80211_supported_band *sband; |
f0706e82 JB |
2569 | u8 bssid[ETH_ALEN], *pos; |
2570 | int i; | |
167ad6f7 | 2571 | int ret; |
0795af57 | 2572 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
2573 | |
2574 | #if 0 | |
2575 | /* Easier testing, use fixed BSSID. */ | |
2576 | memset(bssid, 0xfe, ETH_ALEN); | |
2577 | #else | |
2578 | /* Generate random, not broadcast, locally administered BSSID. Mix in | |
2579 | * own MAC address to make sure that devices that do not have proper | |
2580 | * random number generator get different BSSID. */ | |
2581 | get_random_bytes(bssid, ETH_ALEN); | |
2582 | for (i = 0; i < ETH_ALEN; i++) | |
f698d856 | 2583 | bssid[i] ^= sdata->dev->dev_addr[i]; |
f0706e82 JB |
2584 | bssid[0] &= ~0x01; |
2585 | bssid[0] |= 0x02; | |
2586 | #endif | |
2587 | ||
0795af57 | 2588 | printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n", |
f698d856 | 2589 | sdata->dev->name, print_mac(mac, bssid)); |
f0706e82 | 2590 | |
98c8fccf | 2591 | bss = ieee80211_rx_bss_add(local, bssid, |
8318d78a | 2592 | local->hw.conf.channel->center_freq, |
cffdd30d | 2593 | sdata->u.sta.ssid, sdata->u.sta.ssid_len); |
f0706e82 JB |
2594 | if (!bss) |
2595 | return -ENOMEM; | |
2596 | ||
8318d78a JB |
2597 | bss->band = local->hw.conf.channel->band; |
2598 | sband = local->hw.wiphy->bands[bss->band]; | |
f0706e82 JB |
2599 | |
2600 | if (local->hw.conf.beacon_int == 0) | |
dc0ae30c | 2601 | local->hw.conf.beacon_int = 100; |
f0706e82 | 2602 | bss->beacon_int = local->hw.conf.beacon_int; |
f0706e82 JB |
2603 | bss->last_update = jiffies; |
2604 | bss->capability = WLAN_CAPABILITY_IBSS; | |
988c0f72 JB |
2605 | |
2606 | if (sdata->default_key) | |
f0706e82 | 2607 | bss->capability |= WLAN_CAPABILITY_PRIVACY; |
988c0f72 | 2608 | else |
f0706e82 | 2609 | sdata->drop_unencrypted = 0; |
988c0f72 | 2610 | |
8318d78a | 2611 | bss->supp_rates_len = sband->n_bitrates; |
f0706e82 | 2612 | pos = bss->supp_rates; |
8318d78a JB |
2613 | for (i = 0; i < sband->n_bitrates; i++) { |
2614 | int rate = sband->bitrates[i].bitrate; | |
f0706e82 JB |
2615 | *pos++ = (u8) (rate / 5); |
2616 | } | |
2617 | ||
f698d856 | 2618 | ret = ieee80211_sta_join_ibss(sdata, ifsta, bss); |
3e122be0 | 2619 | ieee80211_rx_bss_put(local, bss); |
167ad6f7 | 2620 | return ret; |
f0706e82 JB |
2621 | } |
2622 | ||
2623 | ||
f698d856 | 2624 | static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2625 | struct ieee80211_if_sta *ifsta) |
2626 | { | |
f698d856 | 2627 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
2628 | struct ieee80211_sta_bss *bss; |
2629 | int found = 0; | |
2630 | u8 bssid[ETH_ALEN]; | |
2631 | int active_ibss; | |
0795af57 JP |
2632 | DECLARE_MAC_BUF(mac); |
2633 | DECLARE_MAC_BUF(mac2); | |
f0706e82 JB |
2634 | |
2635 | if (ifsta->ssid_len == 0) | |
2636 | return -EINVAL; | |
2637 | ||
f698d856 | 2638 | active_ibss = ieee80211_sta_active_ibss(sdata); |
f0706e82 JB |
2639 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
2640 | printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n", | |
f698d856 | 2641 | sdata->dev->name, active_ibss); |
f0706e82 JB |
2642 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
2643 | spin_lock_bh(&local->sta_bss_lock); | |
2644 | list_for_each_entry(bss, &local->sta_bss_list, list) { | |
2645 | if (ifsta->ssid_len != bss->ssid_len || | |
2646 | memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0 | |
2647 | || !(bss->capability & WLAN_CAPABILITY_IBSS)) | |
2648 | continue; | |
2649 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0795af57 JP |
2650 | printk(KERN_DEBUG " bssid=%s found\n", |
2651 | print_mac(mac, bss->bssid)); | |
f0706e82 JB |
2652 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
2653 | memcpy(bssid, bss->bssid, ETH_ALEN); | |
2654 | found = 1; | |
2655 | if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0) | |
2656 | break; | |
2657 | } | |
2658 | spin_unlock_bh(&local->sta_bss_lock); | |
2659 | ||
2660 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
6e43829b VK |
2661 | if (found) |
2662 | printk(KERN_DEBUG " sta_find_ibss: selected %s current " | |
2663 | "%s\n", print_mac(mac, bssid), | |
2664 | print_mac(mac2, ifsta->bssid)); | |
f0706e82 | 2665 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
80693ceb DD |
2666 | |
2667 | if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) { | |
167ad6f7 | 2668 | int ret; |
80693ceb DD |
2669 | int search_freq; |
2670 | ||
2671 | if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) | |
2672 | search_freq = bss->freq; | |
2673 | else | |
2674 | search_freq = local->hw.conf.channel->center_freq; | |
2675 | ||
f698d856 | 2676 | bss = ieee80211_rx_bss_get(local, bssid, search_freq, |
80693ceb DD |
2677 | ifsta->ssid, ifsta->ssid_len); |
2678 | if (!bss) | |
2679 | goto dont_join; | |
2680 | ||
0795af57 | 2681 | printk(KERN_DEBUG "%s: Selected IBSS BSSID %s" |
f0706e82 | 2682 | " based on configured SSID\n", |
f698d856 JBG |
2683 | sdata->dev->name, print_mac(mac, bssid)); |
2684 | ret = ieee80211_sta_join_ibss(sdata, ifsta, bss); | |
3e122be0 | 2685 | ieee80211_rx_bss_put(local, bss); |
167ad6f7 | 2686 | return ret; |
f0706e82 | 2687 | } |
80693ceb DD |
2688 | |
2689 | dont_join: | |
f0706e82 JB |
2690 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
2691 | printk(KERN_DEBUG " did not try to join ibss\n"); | |
2692 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
2693 | ||
2694 | /* Selected IBSS not found in current scan results - try to scan */ | |
48c2fc59 | 2695 | if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED && |
f698d856 | 2696 | !ieee80211_sta_active_ibss(sdata)) { |
f0706e82 JB |
2697 | mod_timer(&ifsta->timer, jiffies + |
2698 | IEEE80211_IBSS_MERGE_INTERVAL); | |
2699 | } else if (time_after(jiffies, local->last_scan_completed + | |
2700 | IEEE80211_SCAN_INTERVAL)) { | |
2701 | printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to " | |
f698d856 JBG |
2702 | "join\n", sdata->dev->name); |
2703 | return ieee80211_sta_req_scan(sdata, ifsta->ssid, | |
f0706e82 | 2704 | ifsta->ssid_len); |
48c2fc59 | 2705 | } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) { |
f0706e82 JB |
2706 | int interval = IEEE80211_SCAN_INTERVAL; |
2707 | ||
2708 | if (time_after(jiffies, ifsta->ibss_join_req + | |
2709 | IEEE80211_IBSS_JOIN_TIMEOUT)) { | |
d6f2da5b | 2710 | if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) && |
8318d78a JB |
2711 | (!(local->oper_channel->flags & |
2712 | IEEE80211_CHAN_NO_IBSS))) | |
f698d856 | 2713 | return ieee80211_sta_create_ibss(sdata, ifsta); |
d6f2da5b | 2714 | if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) { |
8318d78a | 2715 | printk(KERN_DEBUG "%s: IBSS not allowed on" |
f698d856 | 2716 | " %d MHz\n", sdata->dev->name, |
8318d78a | 2717 | local->hw.conf.channel->center_freq); |
f0706e82 JB |
2718 | } |
2719 | ||
2720 | /* No IBSS found - decrease scan interval and continue | |
2721 | * scanning. */ | |
2722 | interval = IEEE80211_SCAN_INTERVAL_SLOW; | |
2723 | } | |
2724 | ||
48c2fc59 | 2725 | ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH; |
f0706e82 JB |
2726 | mod_timer(&ifsta->timer, jiffies + interval); |
2727 | return 0; | |
2728 | } | |
2729 | ||
2730 | return 0; | |
2731 | } | |
2732 | ||
2733 | ||
f698d856 | 2734 | int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len) |
f0706e82 | 2735 | { |
f0706e82 | 2736 | struct ieee80211_if_sta *ifsta; |
9d139c81 | 2737 | int res; |
f0706e82 JB |
2738 | |
2739 | if (len > IEEE80211_MAX_SSID_LEN) | |
2740 | return -EINVAL; | |
2741 | ||
f0706e82 JB |
2742 | ifsta = &sdata->u.sta; |
2743 | ||
9d139c81 JB |
2744 | if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) { |
2745 | memset(ifsta->ssid, 0, sizeof(ifsta->ssid)); | |
2746 | memcpy(ifsta->ssid, ssid, len); | |
2747 | ifsta->ssid_len = len; | |
d6f2da5b | 2748 | ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
9d139c81 JB |
2749 | |
2750 | res = 0; | |
2751 | /* | |
2752 | * Hack! MLME code needs to be cleaned up to have different | |
2753 | * entry points for configuration and internal selection change | |
2754 | */ | |
2755 | if (netif_running(sdata->dev)) | |
2756 | res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID); | |
2757 | if (res) { | |
2758 | printk(KERN_DEBUG "%s: Failed to config new SSID to " | |
f698d856 | 2759 | "the low-level driver\n", sdata->dev->name); |
9d139c81 JB |
2760 | return res; |
2761 | } | |
2762 | } | |
f0706e82 | 2763 | |
d6f2da5b JS |
2764 | if (len) |
2765 | ifsta->flags |= IEEE80211_STA_SSID_SET; | |
2766 | else | |
2767 | ifsta->flags &= ~IEEE80211_STA_SSID_SET; | |
9d139c81 | 2768 | |
51fb61e7 | 2769 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && |
d6f2da5b | 2770 | !(ifsta->flags & IEEE80211_STA_BSSID_SET)) { |
f0706e82 | 2771 | ifsta->ibss_join_req = jiffies; |
48c2fc59 | 2772 | ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH; |
f698d856 | 2773 | return ieee80211_sta_find_ibss(sdata, ifsta); |
f0706e82 | 2774 | } |
9d139c81 | 2775 | |
f0706e82 JB |
2776 | return 0; |
2777 | } | |
2778 | ||
2779 | ||
f698d856 | 2780 | int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len) |
f0706e82 | 2781 | { |
f0706e82 JB |
2782 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
2783 | memcpy(ssid, ifsta->ssid, ifsta->ssid_len); | |
2784 | *len = ifsta->ssid_len; | |
2785 | return 0; | |
2786 | } | |
2787 | ||
2788 | ||
f698d856 | 2789 | int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid) |
f0706e82 | 2790 | { |
f0706e82 JB |
2791 | struct ieee80211_if_sta *ifsta; |
2792 | int res; | |
2793 | ||
f0706e82 JB |
2794 | ifsta = &sdata->u.sta; |
2795 | ||
2796 | if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) { | |
2797 | memcpy(ifsta->bssid, bssid, ETH_ALEN); | |
9d139c81 JB |
2798 | res = 0; |
2799 | /* | |
2800 | * Hack! See also ieee80211_sta_set_ssid. | |
2801 | */ | |
2802 | if (netif_running(sdata->dev)) | |
2803 | res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID); | |
f0706e82 JB |
2804 | if (res) { |
2805 | printk(KERN_DEBUG "%s: Failed to config new BSSID to " | |
f698d856 | 2806 | "the low-level driver\n", sdata->dev->name); |
f0706e82 JB |
2807 | return res; |
2808 | } | |
2809 | } | |
2810 | ||
d6f2da5b JS |
2811 | if (is_valid_ether_addr(bssid)) |
2812 | ifsta->flags |= IEEE80211_STA_BSSID_SET; | |
f0706e82 | 2813 | else |
d6f2da5b JS |
2814 | ifsta->flags &= ~IEEE80211_STA_BSSID_SET; |
2815 | ||
f0706e82 JB |
2816 | return 0; |
2817 | } | |
2818 | ||
2819 | ||
f698d856 | 2820 | int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len) |
f0706e82 | 2821 | { |
f0706e82 | 2822 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
988c0f72 | 2823 | |
f0706e82 JB |
2824 | kfree(ifsta->extra_ie); |
2825 | if (len == 0) { | |
2826 | ifsta->extra_ie = NULL; | |
2827 | ifsta->extra_ie_len = 0; | |
2828 | return 0; | |
2829 | } | |
2830 | ifsta->extra_ie = kmalloc(len, GFP_KERNEL); | |
2831 | if (!ifsta->extra_ie) { | |
2832 | ifsta->extra_ie_len = 0; | |
2833 | return -ENOMEM; | |
2834 | } | |
2835 | memcpy(ifsta->extra_ie, ie, len); | |
2836 | ifsta->extra_ie_len = len; | |
2837 | return 0; | |
2838 | } | |
2839 | ||
2840 | ||
f698d856 | 2841 | struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, |
988c0f72 | 2842 | struct sk_buff *skb, u8 *bssid, |
87291c02 | 2843 | u8 *addr, u64 supp_rates) |
f0706e82 | 2844 | { |
f698d856 | 2845 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 2846 | struct sta_info *sta; |
0795af57 | 2847 | DECLARE_MAC_BUF(mac); |
87291c02 | 2848 | int band = local->hw.conf.channel->band; |
f0706e82 JB |
2849 | |
2850 | /* TODO: Could consider removing the least recently used entry and | |
2851 | * allow new one to be added. */ | |
2852 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { | |
2853 | if (net_ratelimit()) { | |
2854 | printk(KERN_DEBUG "%s: No room for a new IBSS STA " | |
f698d856 | 2855 | "entry %s\n", sdata->dev->name, print_mac(mac, addr)); |
f0706e82 JB |
2856 | } |
2857 | return NULL; | |
2858 | } | |
2859 | ||
1e188637 | 2860 | if (compare_ether_addr(bssid, sdata->u.sta.bssid)) |
87291c02 VK |
2861 | return NULL; |
2862 | ||
f4ea83dd | 2863 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
0795af57 | 2864 | printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n", |
f698d856 | 2865 | wiphy_name(local->hw.wiphy), print_mac(mac, addr), sdata->dev->name); |
f4ea83dd | 2866 | #endif |
f0706e82 | 2867 | |
73651ee6 JB |
2868 | sta = sta_info_alloc(sdata, addr, GFP_ATOMIC); |
2869 | if (!sta) | |
f0706e82 JB |
2870 | return NULL; |
2871 | ||
07346f81 | 2872 | set_sta_flags(sta, WLAN_STA_AUTHORIZED); |
238814fd | 2873 | |
8e1535d5 EG |
2874 | /* make sure mandatory rates are always added */ |
2875 | sta->supp_rates[band] = supp_rates | | |
2876 | ieee80211_sta_get_mandatory_rates(local, band); | |
f0706e82 JB |
2877 | |
2878 | rate_control_rate_init(sta, local); | |
2879 | ||
93e5deb1 | 2880 | if (sta_info_insert(sta)) |
73651ee6 | 2881 | return NULL; |
73651ee6 | 2882 | |
d0709a65 | 2883 | return sta; |
f0706e82 JB |
2884 | } |
2885 | ||
2886 | ||
60f8b39c JB |
2887 | static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata, |
2888 | struct ieee80211_if_sta *ifsta) | |
2889 | { | |
2890 | struct ieee80211_local *local = sdata->local; | |
2891 | struct ieee80211_sta_bss *bss, *selected = NULL; | |
2892 | int top_rssi = 0, freq; | |
2893 | ||
2894 | spin_lock_bh(&local->sta_bss_lock); | |
2895 | freq = local->oper_channel->center_freq; | |
2896 | list_for_each_entry(bss, &local->sta_bss_list, list) { | |
2897 | if (!(bss->capability & WLAN_CAPABILITY_ESS)) | |
2898 | continue; | |
2899 | ||
2900 | if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL | | |
2901 | IEEE80211_STA_AUTO_BSSID_SEL | | |
2902 | IEEE80211_STA_AUTO_CHANNEL_SEL)) && | |
2903 | (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^ | |
2904 | !!sdata->default_key)) | |
2905 | continue; | |
2906 | ||
2907 | if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) && | |
2908 | bss->freq != freq) | |
2909 | continue; | |
2910 | ||
2911 | if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) && | |
2912 | memcmp(bss->bssid, ifsta->bssid, ETH_ALEN)) | |
2913 | continue; | |
2914 | ||
2915 | if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) && | |
2916 | !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len)) | |
2917 | continue; | |
2918 | ||
2919 | if (!selected || top_rssi < bss->signal) { | |
2920 | selected = bss; | |
2921 | top_rssi = bss->signal; | |
2922 | } | |
2923 | } | |
2924 | if (selected) | |
2925 | atomic_inc(&selected->users); | |
2926 | spin_unlock_bh(&local->sta_bss_lock); | |
2927 | ||
2928 | if (selected) { | |
2929 | ieee80211_set_freq(sdata, selected->freq); | |
2930 | if (!(ifsta->flags & IEEE80211_STA_SSID_SET)) | |
2931 | ieee80211_sta_set_ssid(sdata, selected->ssid, | |
2932 | selected->ssid_len); | |
2933 | ieee80211_sta_set_bssid(sdata, selected->bssid); | |
b079ada7 | 2934 | ieee80211_sta_def_wmm_params(sdata, selected); |
60f8b39c JB |
2935 | |
2936 | /* Send out direct probe if no probe resp was received or | |
2937 | * the one we have is outdated | |
2938 | */ | |
2939 | if (!selected->last_probe_resp || | |
2940 | time_after(jiffies, selected->last_probe_resp | |
2941 | + IEEE80211_SCAN_RESULT_EXPIRE)) | |
2942 | ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE; | |
2943 | else | |
2944 | ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE; | |
2945 | ||
2946 | ieee80211_rx_bss_put(local, selected); | |
2947 | ieee80211_sta_reset_auth(sdata, ifsta); | |
2948 | return 0; | |
2949 | } else { | |
2950 | if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) { | |
2951 | ifsta->assoc_scan_tries++; | |
2952 | if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) | |
2953 | ieee80211_sta_start_scan(sdata, NULL, 0); | |
2954 | else | |
2955 | ieee80211_sta_start_scan(sdata, ifsta->ssid, | |
2956 | ifsta->ssid_len); | |
2957 | ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE; | |
2958 | set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); | |
2959 | } else | |
2960 | ifsta->state = IEEE80211_STA_MLME_DISABLED; | |
2961 | } | |
2962 | return -1; | |
2963 | } | |
2964 | ||
2965 | ||
f698d856 | 2966 | int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 2967 | { |
f0706e82 JB |
2968 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
2969 | ||
f4ea83dd | 2970 | printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n", |
f698d856 | 2971 | sdata->dev->name, reason); |
f0706e82 | 2972 | |
51fb61e7 JB |
2973 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA && |
2974 | sdata->vif.type != IEEE80211_IF_TYPE_IBSS) | |
f0706e82 JB |
2975 | return -EINVAL; |
2976 | ||
aa458d17 | 2977 | ieee80211_set_disassoc(sdata, ifsta, true, true, reason); |
f0706e82 JB |
2978 | return 0; |
2979 | } | |
2980 | ||
2981 | ||
f698d856 | 2982 | int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 2983 | { |
f0706e82 JB |
2984 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
2985 | ||
f4ea83dd | 2986 | printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n", |
f698d856 | 2987 | sdata->dev->name, reason); |
f0706e82 | 2988 | |
51fb61e7 | 2989 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
f0706e82 JB |
2990 | return -EINVAL; |
2991 | ||
d6f2da5b | 2992 | if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED)) |
f0706e82 JB |
2993 | return -1; |
2994 | ||
aa458d17 | 2995 | ieee80211_set_disassoc(sdata, ifsta, false, true, reason); |
f0706e82 JB |
2996 | return 0; |
2997 | } | |
84363e6e MA |
2998 | |
2999 | void ieee80211_notify_mac(struct ieee80211_hw *hw, | |
3000 | enum ieee80211_notification_types notif_type) | |
3001 | { | |
3002 | struct ieee80211_local *local = hw_to_local(hw); | |
3003 | struct ieee80211_sub_if_data *sdata; | |
3004 | ||
3005 | switch (notif_type) { | |
3006 | case IEEE80211_NOTIFY_RE_ASSOC: | |
3007 | rcu_read_lock(); | |
3008 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
3e122be0 JB |
3009 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
3010 | continue; | |
84363e6e | 3011 | |
f698d856 | 3012 | ieee80211_sta_req_auth(sdata, &sdata->u.sta); |
84363e6e MA |
3013 | } |
3014 | rcu_read_unlock(); | |
3015 | break; | |
3016 | } | |
3017 | } | |
3018 | EXPORT_SYMBOL(ieee80211_notify_mac); | |
60f8b39c JB |
3019 | |
3020 | void ieee80211_sta_work(struct work_struct *work) | |
3021 | { | |
3022 | struct ieee80211_sub_if_data *sdata = | |
3023 | container_of(work, struct ieee80211_sub_if_data, u.sta.work); | |
3024 | struct ieee80211_local *local = sdata->local; | |
3025 | struct ieee80211_if_sta *ifsta; | |
3026 | struct sk_buff *skb; | |
3027 | ||
3028 | if (!netif_running(sdata->dev)) | |
3029 | return; | |
3030 | ||
3031 | if (local->sta_sw_scanning || local->sta_hw_scanning) | |
3032 | return; | |
3033 | ||
3034 | if (WARN_ON(sdata->vif.type != IEEE80211_IF_TYPE_STA && | |
3035 | sdata->vif.type != IEEE80211_IF_TYPE_IBSS && | |
3036 | sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT)) | |
3037 | return; | |
3038 | ifsta = &sdata->u.sta; | |
3039 | ||
3040 | while ((skb = skb_dequeue(&ifsta->skb_queue))) | |
3041 | ieee80211_sta_rx_queued_mgmt(sdata, skb); | |
3042 | ||
3043 | #ifdef CONFIG_MAC80211_MESH | |
3044 | if (ifsta->preq_queue_len && | |
3045 | time_after(jiffies, | |
3046 | ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval))) | |
3047 | mesh_path_start_discovery(sdata); | |
3048 | #endif | |
3049 | ||
3050 | if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE && | |
3051 | ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE && | |
3052 | ifsta->state != IEEE80211_STA_MLME_ASSOCIATE && | |
3053 | test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) { | |
a0fe8b33 | 3054 | ieee80211_sta_start_scan(sdata, ifsta->scan_ssid, ifsta->scan_ssid_len); |
60f8b39c JB |
3055 | return; |
3056 | } | |
3057 | ||
3058 | if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) { | |
3059 | if (ieee80211_sta_config_auth(sdata, ifsta)) | |
3060 | return; | |
3061 | clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); | |
3062 | } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request)) | |
3063 | return; | |
3064 | ||
3065 | switch (ifsta->state) { | |
3066 | case IEEE80211_STA_MLME_DISABLED: | |
3067 | break; | |
3068 | case IEEE80211_STA_MLME_DIRECT_PROBE: | |
3069 | ieee80211_direct_probe(sdata, ifsta); | |
3070 | break; | |
3071 | case IEEE80211_STA_MLME_AUTHENTICATE: | |
3072 | ieee80211_authenticate(sdata, ifsta); | |
3073 | break; | |
3074 | case IEEE80211_STA_MLME_ASSOCIATE: | |
3075 | ieee80211_associate(sdata, ifsta); | |
3076 | break; | |
3077 | case IEEE80211_STA_MLME_ASSOCIATED: | |
3078 | ieee80211_associated(sdata, ifsta); | |
3079 | break; | |
3080 | case IEEE80211_STA_MLME_IBSS_SEARCH: | |
3081 | ieee80211_sta_find_ibss(sdata, ifsta); | |
3082 | break; | |
3083 | case IEEE80211_STA_MLME_IBSS_JOINED: | |
3084 | ieee80211_sta_merge_ibss(sdata, ifsta); | |
3085 | break; | |
3086 | #ifdef CONFIG_MAC80211_MESH | |
3087 | case IEEE80211_STA_MLME_MESH_UP: | |
3088 | ieee80211_mesh_housekeeping(sdata, ifsta); | |
3089 | break; | |
3090 | #endif | |
3091 | default: | |
3092 | WARN_ON(1); | |
3093 | break; | |
3094 | } | |
3095 | ||
3096 | if (ieee80211_privacy_mismatch(sdata, ifsta)) { | |
3097 | printk(KERN_DEBUG "%s: privacy configuration mismatch and " | |
3098 | "mixed-cell disabled - disassociate\n", sdata->dev->name); | |
3099 | ||
3100 | ieee80211_set_disassoc(sdata, ifsta, false, true, | |
3101 | WLAN_REASON_UNSPECIFIED); | |
3102 | } | |
3103 | } | |
0a51b27e JB |
3104 | |
3105 | void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) | |
3106 | { | |
3107 | struct ieee80211_sub_if_data *sdata = local->scan_sdata; | |
3108 | struct ieee80211_if_sta *ifsta; | |
3109 | ||
3110 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) { | |
3111 | ifsta = &sdata->u.sta; | |
3112 | if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) || | |
3113 | (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) && | |
3114 | !ieee80211_sta_active_ibss(sdata))) | |
3115 | ieee80211_sta_find_ibss(sdata, ifsta); | |
3116 | } | |
3117 | } |