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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 | ||
14 | /* TODO: | |
f0706e82 JB |
15 | * order BSS list by RSSI(?) ("quality of AP") |
16 | * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE, | |
17 | * SSID) | |
18 | */ | |
5b323edb | 19 | #include <linux/delay.h> |
f0706e82 JB |
20 | #include <linux/if_ether.h> |
21 | #include <linux/skbuff.h> | |
22 | #include <linux/netdevice.h> | |
23 | #include <linux/if_arp.h> | |
24 | #include <linux/wireless.h> | |
25 | #include <linux/random.h> | |
26 | #include <linux/etherdevice.h> | |
d0709a65 | 27 | #include <linux/rtnetlink.h> |
f0706e82 JB |
28 | #include <net/iw_handler.h> |
29 | #include <asm/types.h> | |
f0706e82 JB |
30 | |
31 | #include <net/mac80211.h> | |
32 | #include "ieee80211_i.h" | |
2c8dccc7 JB |
33 | #include "rate.h" |
34 | #include "led.h" | |
f709fc69 | 35 | #include "mesh.h" |
f0706e82 | 36 | |
6042a3e3 | 37 | #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2 |
f0706e82 JB |
38 | #define IEEE80211_AUTH_TIMEOUT (HZ / 5) |
39 | #define IEEE80211_AUTH_MAX_TRIES 3 | |
40 | #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) | |
41 | #define IEEE80211_ASSOC_MAX_TRIES 3 | |
42 | #define IEEE80211_MONITORING_INTERVAL (2 * HZ) | |
f709fc69 | 43 | #define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ) |
f0706e82 JB |
44 | #define IEEE80211_PROBE_INTERVAL (60 * HZ) |
45 | #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ) | |
46 | #define IEEE80211_SCAN_INTERVAL (2 * HZ) | |
47 | #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ) | |
872ba533 | 48 | #define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ) |
f0706e82 JB |
49 | |
50 | #define IEEE80211_PROBE_DELAY (HZ / 33) | |
51 | #define IEEE80211_CHANNEL_TIME (HZ / 33) | |
52 | #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5) | |
53 | #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ) | |
54 | #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ) | |
55 | #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ) | |
f709fc69 | 56 | #define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ) |
f0706e82 JB |
57 | |
58 | #define IEEE80211_IBSS_MAX_STA_ENTRIES 128 | |
59 | ||
60 | ||
f0706e82 JB |
61 | #define ERP_INFO_USE_PROTECTION BIT(1) |
62 | ||
9f985b0e RR |
63 | /* mgmt header + 1 byte action code */ |
64 | #define IEEE80211_MIN_ACTION_SIZE (24 + 1) | |
65 | ||
66 | #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002 | |
67 | #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C | |
68 | #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0 | |
688b88a4 RR |
69 | #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000 |
70 | #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800 | |
9f985b0e | 71 | |
07db2183 RR |
72 | /* next values represent the buffer size for A-MPDU frame. |
73 | * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */ | |
74 | #define IEEE80211_MIN_AMPDU_BUF 0x8 | |
75 | #define IEEE80211_MAX_AMPDU_BUF 0x40 | |
76 | ||
f698d856 | 77 | static void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst, |
f0706e82 JB |
78 | u8 *ssid, size_t ssid_len); |
79 | static struct ieee80211_sta_bss * | |
f698d856 | 80 | ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq, |
cffdd30d | 81 | u8 *ssid, u8 ssid_len); |
3e122be0 | 82 | static void ieee80211_rx_bss_put(struct ieee80211_local *local, |
f0706e82 | 83 | struct ieee80211_sta_bss *bss); |
f698d856 | 84 | static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata, |
f0706e82 | 85 | struct ieee80211_if_sta *ifsta); |
f698d856 JBG |
86 | static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata); |
87 | static int ieee80211_sta_start_scan(struct ieee80211_sub_if_data *sdata, | |
f0706e82 | 88 | u8 *ssid, size_t ssid_len); |
f698d856 | 89 | static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 | 90 | struct ieee80211_if_sta *ifsta); |
712590de | 91 | static void sta_rx_agg_session_timer_expired(unsigned long data); |
f0706e82 JB |
92 | |
93 | ||
ee385855 LCC |
94 | void ieee802_11_parse_elems(u8 *start, size_t len, |
95 | struct ieee802_11_elems *elems) | |
f0706e82 JB |
96 | { |
97 | size_t left = len; | |
98 | u8 *pos = start; | |
f0706e82 JB |
99 | |
100 | memset(elems, 0, sizeof(*elems)); | |
101 | ||
102 | while (left >= 2) { | |
103 | u8 id, elen; | |
104 | ||
105 | id = *pos++; | |
106 | elen = *pos++; | |
107 | left -= 2; | |
108 | ||
67a4cce4 JL |
109 | if (elen > left) |
110 | return; | |
f0706e82 JB |
111 | |
112 | switch (id) { | |
113 | case WLAN_EID_SSID: | |
114 | elems->ssid = pos; | |
115 | elems->ssid_len = elen; | |
116 | break; | |
117 | case WLAN_EID_SUPP_RATES: | |
118 | elems->supp_rates = pos; | |
119 | elems->supp_rates_len = elen; | |
120 | break; | |
121 | case WLAN_EID_FH_PARAMS: | |
122 | elems->fh_params = pos; | |
123 | elems->fh_params_len = elen; | |
124 | break; | |
125 | case WLAN_EID_DS_PARAMS: | |
126 | elems->ds_params = pos; | |
127 | elems->ds_params_len = elen; | |
128 | break; | |
129 | case WLAN_EID_CF_PARAMS: | |
130 | elems->cf_params = pos; | |
131 | elems->cf_params_len = elen; | |
132 | break; | |
133 | case WLAN_EID_TIM: | |
134 | elems->tim = pos; | |
135 | elems->tim_len = elen; | |
136 | break; | |
137 | case WLAN_EID_IBSS_PARAMS: | |
138 | elems->ibss_params = pos; | |
139 | elems->ibss_params_len = elen; | |
140 | break; | |
141 | case WLAN_EID_CHALLENGE: | |
142 | elems->challenge = pos; | |
143 | elems->challenge_len = elen; | |
144 | break; | |
145 | case WLAN_EID_WPA: | |
146 | if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && | |
147 | pos[2] == 0xf2) { | |
148 | /* Microsoft OUI (00:50:F2) */ | |
149 | if (pos[3] == 1) { | |
150 | /* OUI Type 1 - WPA IE */ | |
151 | elems->wpa = pos; | |
152 | elems->wpa_len = elen; | |
153 | } else if (elen >= 5 && pos[3] == 2) { | |
154 | if (pos[4] == 0) { | |
155 | elems->wmm_info = pos; | |
156 | elems->wmm_info_len = elen; | |
157 | } else if (pos[4] == 1) { | |
158 | elems->wmm_param = pos; | |
159 | elems->wmm_param_len = elen; | |
160 | } | |
161 | } | |
162 | } | |
163 | break; | |
164 | case WLAN_EID_RSN: | |
165 | elems->rsn = pos; | |
166 | elems->rsn_len = elen; | |
167 | break; | |
168 | case WLAN_EID_ERP_INFO: | |
169 | elems->erp_info = pos; | |
170 | elems->erp_info_len = elen; | |
171 | break; | |
172 | case WLAN_EID_EXT_SUPP_RATES: | |
173 | elems->ext_supp_rates = pos; | |
174 | elems->ext_supp_rates_len = elen; | |
175 | break; | |
c7153508 RR |
176 | case WLAN_EID_HT_CAPABILITY: |
177 | elems->ht_cap_elem = pos; | |
178 | elems->ht_cap_elem_len = elen; | |
179 | break; | |
180 | case WLAN_EID_HT_EXTRA_INFO: | |
181 | elems->ht_info_elem = pos; | |
182 | elems->ht_info_elem_len = elen; | |
183 | break; | |
ee385855 LCC |
184 | case WLAN_EID_MESH_ID: |
185 | elems->mesh_id = pos; | |
186 | elems->mesh_id_len = elen; | |
187 | break; | |
188 | case WLAN_EID_MESH_CONFIG: | |
189 | elems->mesh_config = pos; | |
190 | elems->mesh_config_len = elen; | |
191 | break; | |
192 | case WLAN_EID_PEER_LINK: | |
193 | elems->peer_link = pos; | |
194 | elems->peer_link_len = elen; | |
195 | break; | |
196 | case WLAN_EID_PREQ: | |
197 | elems->preq = pos; | |
198 | elems->preq_len = elen; | |
199 | break; | |
200 | case WLAN_EID_PREP: | |
201 | elems->prep = pos; | |
202 | elems->prep_len = elen; | |
203 | break; | |
204 | case WLAN_EID_PERR: | |
205 | elems->perr = pos; | |
206 | elems->perr_len = elen; | |
207 | break; | |
f2df3859 AK |
208 | case WLAN_EID_CHANNEL_SWITCH: |
209 | elems->ch_switch_elem = pos; | |
210 | elems->ch_switch_elem_len = elen; | |
211 | break; | |
212 | case WLAN_EID_QUIET: | |
213 | if (!elems->quiet_elem) { | |
214 | elems->quiet_elem = pos; | |
215 | elems->quiet_elem_len = elen; | |
216 | } | |
217 | elems->num_of_quiet_elem++; | |
218 | break; | |
219 | case WLAN_EID_COUNTRY: | |
220 | elems->country_elem = pos; | |
221 | elems->country_elem_len = elen; | |
222 | break; | |
223 | case WLAN_EID_PWR_CONSTRAINT: | |
224 | elems->pwr_constr_elem = pos; | |
225 | elems->pwr_constr_elem_len = elen; | |
226 | break; | |
f0706e82 | 227 | default: |
f0706e82 JB |
228 | break; |
229 | } | |
230 | ||
231 | left -= elen; | |
232 | pos += elen; | |
233 | } | |
f0706e82 JB |
234 | } |
235 | ||
236 | ||
f0706e82 JB |
237 | static int ecw2cw(int ecw) |
238 | { | |
ac2bf324 | 239 | return (1 << ecw) - 1; |
f0706e82 JB |
240 | } |
241 | ||
e2839d8f | 242 | |
f698d856 | 243 | static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata, |
e2839d8f VK |
244 | struct ieee80211_sta_bss *bss, |
245 | int ibss) | |
246 | { | |
e2839d8f VK |
247 | struct ieee80211_local *local = sdata->local; |
248 | int i, have_higher_than_11mbit = 0; | |
249 | ||
250 | ||
251 | /* cf. IEEE 802.11 9.2.12 */ | |
252 | for (i = 0; i < bss->supp_rates_len; i++) | |
253 | if ((bss->supp_rates[i] & 0x7f) * 5 > 110) | |
254 | have_higher_than_11mbit = 1; | |
255 | ||
256 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
257 | have_higher_than_11mbit) | |
258 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
259 | else | |
260 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
261 | ||
262 | ||
263 | if (local->ops->conf_tx) { | |
264 | struct ieee80211_tx_queue_params qparam; | |
e2839d8f VK |
265 | |
266 | memset(&qparam, 0, sizeof(qparam)); | |
267 | ||
268 | qparam.aifs = 2; | |
269 | ||
270 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
271 | !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)) | |
272 | qparam.cw_min = 31; | |
273 | else | |
274 | qparam.cw_min = 15; | |
275 | ||
276 | qparam.cw_max = 1023; | |
277 | qparam.txop = 0; | |
278 | ||
e100bb64 JB |
279 | for (i = 0; i < local_to_hw(local)->queues; i++) |
280 | local->ops->conf_tx(local_to_hw(local), i, &qparam); | |
e2839d8f VK |
281 | } |
282 | } | |
283 | ||
f698d856 | 284 | static void ieee80211_sta_wmm_params(struct ieee80211_local *local, |
f0706e82 JB |
285 | struct ieee80211_if_sta *ifsta, |
286 | u8 *wmm_param, size_t wmm_param_len) | |
287 | { | |
f0706e82 JB |
288 | struct ieee80211_tx_queue_params params; |
289 | size_t left; | |
290 | int count; | |
291 | u8 *pos; | |
292 | ||
3434fbd3 JB |
293 | if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED)) |
294 | return; | |
295 | ||
296 | if (!wmm_param) | |
297 | return; | |
298 | ||
f0706e82 JB |
299 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) |
300 | return; | |
301 | count = wmm_param[6] & 0x0f; | |
302 | if (count == ifsta->wmm_last_param_set) | |
303 | return; | |
304 | ifsta->wmm_last_param_set = count; | |
305 | ||
306 | pos = wmm_param + 8; | |
307 | left = wmm_param_len - 8; | |
308 | ||
309 | memset(¶ms, 0, sizeof(params)); | |
310 | ||
311 | if (!local->ops->conf_tx) | |
312 | return; | |
313 | ||
314 | local->wmm_acm = 0; | |
315 | for (; left >= 4; left -= 4, pos += 4) { | |
316 | int aci = (pos[0] >> 5) & 0x03; | |
317 | int acm = (pos[0] >> 4) & 0x01; | |
318 | int queue; | |
319 | ||
320 | switch (aci) { | |
321 | case 1: | |
e100bb64 | 322 | queue = 3; |
988c0f72 | 323 | if (acm) |
f0706e82 | 324 | local->wmm_acm |= BIT(0) | BIT(3); |
f0706e82 JB |
325 | break; |
326 | case 2: | |
e100bb64 | 327 | queue = 1; |
988c0f72 | 328 | if (acm) |
f0706e82 | 329 | local->wmm_acm |= BIT(4) | BIT(5); |
f0706e82 JB |
330 | break; |
331 | case 3: | |
e100bb64 | 332 | queue = 0; |
988c0f72 | 333 | if (acm) |
f0706e82 | 334 | local->wmm_acm |= BIT(6) | BIT(7); |
f0706e82 JB |
335 | break; |
336 | case 0: | |
337 | default: | |
e100bb64 | 338 | queue = 2; |
988c0f72 | 339 | if (acm) |
f0706e82 | 340 | local->wmm_acm |= BIT(1) | BIT(2); |
f0706e82 JB |
341 | break; |
342 | } | |
343 | ||
344 | params.aifs = pos[0] & 0x0f; | |
345 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); | |
346 | params.cw_min = ecw2cw(pos[1] & 0x0f); | |
f434b2d1 | 347 | params.txop = get_unaligned_le16(pos + 2); |
f4ea83dd | 348 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
f0706e82 | 349 | printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d " |
3330d7be | 350 | "cWmin=%d cWmax=%d txop=%d\n", |
f698d856 | 351 | local->mdev->name, queue, aci, acm, params.aifs, params.cw_min, |
3330d7be JB |
352 | params.cw_max, params.txop); |
353 | #endif | |
f0706e82 JB |
354 | /* TODO: handle ACM (block TX, fallback to next lowest allowed |
355 | * AC for now) */ | |
356 | if (local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) { | |
357 | printk(KERN_DEBUG "%s: failed to set TX queue " | |
f698d856 | 358 | "parameters for queue %d\n", local->mdev->name, queue); |
f0706e82 JB |
359 | } |
360 | } | |
361 | } | |
362 | ||
50c4afb9 JL |
363 | static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata, |
364 | bool use_protection, | |
365 | bool use_short_preamble) | |
5628221c | 366 | { |
471b3efd | 367 | struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf; |
ebd74487 | 368 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
5628221c | 369 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
0795af57 | 370 | DECLARE_MAC_BUF(mac); |
ebd74487 | 371 | #endif |
471b3efd | 372 | u32 changed = 0; |
5628221c | 373 | |
471b3efd | 374 | if (use_protection != bss_conf->use_cts_prot) { |
f4ea83dd | 375 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
5628221c DD |
376 | if (net_ratelimit()) { |
377 | printk(KERN_DEBUG "%s: CTS protection %s (BSSID=" | |
0795af57 | 378 | "%s)\n", |
471b3efd | 379 | sdata->dev->name, |
5628221c | 380 | use_protection ? "enabled" : "disabled", |
0795af57 | 381 | print_mac(mac, ifsta->bssid)); |
5628221c | 382 | } |
f4ea83dd | 383 | #endif |
471b3efd JB |
384 | bss_conf->use_cts_prot = use_protection; |
385 | changed |= BSS_CHANGED_ERP_CTS_PROT; | |
5628221c | 386 | } |
7e9ed188 | 387 | |
d43c7b37 | 388 | if (use_short_preamble != bss_conf->use_short_preamble) { |
f4ea83dd | 389 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
7e9ed188 DD |
390 | if (net_ratelimit()) { |
391 | printk(KERN_DEBUG "%s: switched to %s barker preamble" | |
0795af57 | 392 | " (BSSID=%s)\n", |
471b3efd | 393 | sdata->dev->name, |
d43c7b37 | 394 | use_short_preamble ? "short" : "long", |
0795af57 | 395 | print_mac(mac, ifsta->bssid)); |
7e9ed188 | 396 | } |
f4ea83dd | 397 | #endif |
d43c7b37 | 398 | bss_conf->use_short_preamble = use_short_preamble; |
471b3efd | 399 | changed |= BSS_CHANGED_ERP_PREAMBLE; |
7e9ed188 | 400 | } |
d9430a32 | 401 | |
471b3efd | 402 | return changed; |
5628221c DD |
403 | } |
404 | ||
50c4afb9 JL |
405 | static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata, |
406 | u8 erp_value) | |
407 | { | |
408 | bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0; | |
409 | bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0; | |
410 | ||
411 | return ieee80211_handle_protect_preamb(sdata, | |
412 | use_protection, use_short_preamble); | |
413 | } | |
414 | ||
415 | static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, | |
416 | struct ieee80211_sta_bss *bss) | |
417 | { | |
418 | u32 changed = 0; | |
419 | ||
420 | if (bss->has_erp_value) | |
421 | changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value); | |
422 | else { | |
423 | u16 capab = bss->capability; | |
424 | changed |= ieee80211_handle_protect_preamb(sdata, false, | |
425 | (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0); | |
426 | } | |
427 | ||
428 | return changed; | |
429 | } | |
430 | ||
c7153508 RR |
431 | int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie, |
432 | struct ieee80211_ht_info *ht_info) | |
433 | { | |
434 | ||
435 | if (ht_info == NULL) | |
436 | return -EINVAL; | |
437 | ||
438 | memset(ht_info, 0, sizeof(*ht_info)); | |
439 | ||
440 | if (ht_cap_ie) { | |
441 | u8 ampdu_info = ht_cap_ie->ampdu_params_info; | |
442 | ||
443 | ht_info->ht_supported = 1; | |
444 | ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info); | |
445 | ht_info->ampdu_factor = | |
446 | ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR; | |
447 | ht_info->ampdu_density = | |
448 | (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2; | |
449 | memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16); | |
450 | } else | |
451 | ht_info->ht_supported = 0; | |
452 | ||
453 | return 0; | |
454 | } | |
455 | ||
456 | int ieee80211_ht_addt_info_ie_to_ht_bss_info( | |
457 | struct ieee80211_ht_addt_info *ht_add_info_ie, | |
458 | struct ieee80211_ht_bss_info *bss_info) | |
459 | { | |
460 | if (bss_info == NULL) | |
461 | return -EINVAL; | |
462 | ||
463 | memset(bss_info, 0, sizeof(*bss_info)); | |
464 | ||
465 | if (ht_add_info_ie) { | |
466 | u16 op_mode; | |
467 | op_mode = le16_to_cpu(ht_add_info_ie->operation_mode); | |
468 | ||
469 | bss_info->primary_channel = ht_add_info_ie->control_chan; | |
470 | bss_info->bss_cap = ht_add_info_ie->ht_param; | |
471 | bss_info->bss_op_mode = (u8)(op_mode & 0xff); | |
472 | } | |
473 | ||
474 | return 0; | |
475 | } | |
5628221c | 476 | |
f698d856 | 477 | static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
478 | struct ieee80211_if_sta *ifsta) |
479 | { | |
480 | char *buf; | |
481 | size_t len; | |
482 | int i; | |
483 | union iwreq_data wrqu; | |
484 | ||
485 | if (!ifsta->assocreq_ies && !ifsta->assocresp_ies) | |
486 | return; | |
487 | ||
488 | buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len + | |
0ec0b7ac | 489 | ifsta->assocresp_ies_len), GFP_KERNEL); |
f0706e82 JB |
490 | if (!buf) |
491 | return; | |
492 | ||
493 | len = sprintf(buf, "ASSOCINFO("); | |
494 | if (ifsta->assocreq_ies) { | |
495 | len += sprintf(buf + len, "ReqIEs="); | |
496 | for (i = 0; i < ifsta->assocreq_ies_len; i++) { | |
497 | len += sprintf(buf + len, "%02x", | |
498 | ifsta->assocreq_ies[i]); | |
499 | } | |
500 | } | |
501 | if (ifsta->assocresp_ies) { | |
502 | if (ifsta->assocreq_ies) | |
503 | len += sprintf(buf + len, " "); | |
504 | len += sprintf(buf + len, "RespIEs="); | |
505 | for (i = 0; i < ifsta->assocresp_ies_len; i++) { | |
506 | len += sprintf(buf + len, "%02x", | |
507 | ifsta->assocresp_ies[i]); | |
508 | } | |
509 | } | |
510 | len += sprintf(buf + len, ")"); | |
511 | ||
512 | if (len > IW_CUSTOM_MAX) { | |
513 | len = sprintf(buf, "ASSOCRESPIE="); | |
514 | for (i = 0; i < ifsta->assocresp_ies_len; i++) { | |
515 | len += sprintf(buf + len, "%02x", | |
516 | ifsta->assocresp_ies[i]); | |
517 | } | |
518 | } | |
519 | ||
520 | memset(&wrqu, 0, sizeof(wrqu)); | |
521 | wrqu.data.length = len; | |
f698d856 | 522 | wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf); |
f0706e82 JB |
523 | |
524 | kfree(buf); | |
525 | } | |
526 | ||
527 | ||
f698d856 | 528 | static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
d6f2da5b | 529 | struct ieee80211_if_sta *ifsta, |
47f0c502 | 530 | bool assoc) |
f0706e82 | 531 | { |
471b3efd | 532 | struct ieee80211_local *local = sdata->local; |
38668c05 | 533 | struct ieee80211_conf *conf = &local_to_hw(local)->conf; |
f0706e82 | 534 | union iwreq_data wrqu; |
471b3efd | 535 | u32 changed = BSS_CHANGED_ASSOC; |
f0706e82 | 536 | |
f0706e82 | 537 | if (assoc) { |
5628221c | 538 | struct ieee80211_sta_bss *bss; |
d6f2da5b JS |
539 | |
540 | ifsta->flags |= IEEE80211_STA_ASSOCIATED; | |
541 | ||
51fb61e7 | 542 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
f0706e82 | 543 | return; |
5628221c | 544 | |
f698d856 | 545 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
38668c05 | 546 | conf->channel->center_freq, |
cffdd30d | 547 | ifsta->ssid, ifsta->ssid_len); |
5628221c | 548 | if (bss) { |
21c0cbe7 TW |
549 | /* set timing information */ |
550 | sdata->bss_conf.beacon_int = bss->beacon_int; | |
551 | sdata->bss_conf.timestamp = bss->timestamp; | |
98f7dfd8 | 552 | sdata->bss_conf.dtim_period = bss->dtim_period; |
21c0cbe7 | 553 | |
50c4afb9 | 554 | changed |= ieee80211_handle_bss_capability(sdata, bss); |
21c0cbe7 | 555 | |
3e122be0 | 556 | ieee80211_rx_bss_put(local, bss); |
5628221c DD |
557 | } |
558 | ||
38668c05 TW |
559 | if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) { |
560 | changed |= BSS_CHANGED_HT; | |
561 | sdata->bss_conf.assoc_ht = 1; | |
562 | sdata->bss_conf.ht_conf = &conf->ht_conf; | |
563 | sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf; | |
564 | } | |
565 | ||
d6f2da5b | 566 | ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET; |
f0706e82 JB |
567 | memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN); |
568 | memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN); | |
f698d856 | 569 | ieee80211_sta_send_associnfo(sdata, ifsta); |
f0706e82 | 570 | } else { |
f698d856 JBG |
571 | netif_carrier_off(sdata->dev); |
572 | ieee80211_sta_tear_down_BA_sessions(sdata, ifsta->bssid); | |
d6f2da5b | 573 | ifsta->flags &= ~IEEE80211_STA_ASSOCIATED; |
f698d856 | 574 | changed |= ieee80211_reset_erp_info(sdata); |
38668c05 TW |
575 | |
576 | sdata->bss_conf.assoc_ht = 0; | |
577 | sdata->bss_conf.ht_conf = NULL; | |
578 | sdata->bss_conf.ht_bss_conf = NULL; | |
579 | ||
f0706e82 JB |
580 | memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN); |
581 | } | |
f0706e82 | 582 | ifsta->last_probe = jiffies; |
47f0c502 | 583 | ieee80211_led_assoc(local, assoc); |
471b3efd | 584 | |
b2205256 | 585 | sdata->bss_conf.assoc = assoc; |
471b3efd | 586 | ieee80211_bss_info_change_notify(sdata, changed); |
8db9369f GC |
587 | |
588 | if (assoc) | |
f698d856 | 589 | netif_carrier_on(sdata->dev); |
8db9369f | 590 | |
41a7be48 | 591 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; |
f698d856 | 592 | wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL); |
f0706e82 JB |
593 | } |
594 | ||
f698d856 | 595 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
596 | struct ieee80211_if_sta *ifsta, int deauth) |
597 | { | |
598 | if (deauth) | |
599 | ifsta->auth_tries = 0; | |
6042a3e3 | 600 | ifsta->assoc_scan_tries = 0; |
f0706e82 | 601 | ifsta->assoc_tries = 0; |
f698d856 | 602 | ieee80211_set_associated(sdata, ifsta, 0); |
f0706e82 JB |
603 | } |
604 | ||
f698d856 | 605 | void ieee80211_sta_tx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, |
ee385855 | 606 | int encrypt) |
f0706e82 | 607 | { |
f0706e82 JB |
608 | skb->dev = sdata->local->mdev; |
609 | skb_set_mac_header(skb, 0); | |
610 | skb_set_network_header(skb, 0); | |
611 | skb_set_transport_header(skb, 0); | |
612 | ||
d0f09804 JB |
613 | skb->iif = sdata->dev->ifindex; |
614 | skb->do_not_encrypt = !encrypt; | |
f0706e82 JB |
615 | |
616 | dev_queue_xmit(skb); | |
617 | } | |
618 | ||
619 | ||
f698d856 | 620 | static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
621 | struct ieee80211_if_sta *ifsta, |
622 | int transaction, u8 *extra, size_t extra_len, | |
623 | int encrypt) | |
624 | { | |
f698d856 | 625 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
626 | struct sk_buff *skb; |
627 | struct ieee80211_mgmt *mgmt; | |
628 | ||
629 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
630 | sizeof(*mgmt) + 6 + extra_len); | |
631 | if (!skb) { | |
632 | printk(KERN_DEBUG "%s: failed to allocate buffer for auth " | |
f698d856 | 633 | "frame\n", sdata->dev->name); |
f0706e82 JB |
634 | return; |
635 | } | |
636 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
637 | ||
638 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); | |
639 | memset(mgmt, 0, 24 + 6); | |
e7827a70 HH |
640 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
641 | IEEE80211_STYPE_AUTH); | |
f0706e82 JB |
642 | if (encrypt) |
643 | mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
644 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
f698d856 | 645 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
f0706e82 JB |
646 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); |
647 | mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg); | |
648 | mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); | |
649 | ifsta->auth_transaction = transaction + 1; | |
650 | mgmt->u.auth.status_code = cpu_to_le16(0); | |
651 | if (extra) | |
652 | memcpy(skb_put(skb, extra_len), extra, extra_len); | |
653 | ||
f698d856 | 654 | ieee80211_sta_tx(sdata, skb, encrypt); |
f0706e82 JB |
655 | } |
656 | ||
657 | ||
f698d856 | 658 | static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
659 | struct ieee80211_if_sta *ifsta) |
660 | { | |
0795af57 JP |
661 | DECLARE_MAC_BUF(mac); |
662 | ||
f0706e82 JB |
663 | ifsta->auth_tries++; |
664 | if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0795af57 | 665 | printk(KERN_DEBUG "%s: authentication with AP %s" |
f0706e82 | 666 | " timed out\n", |
f698d856 | 667 | sdata->dev->name, print_mac(mac, ifsta->bssid)); |
48c2fc59 | 668 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
f0706e82 JB |
669 | return; |
670 | } | |
671 | ||
48c2fc59 | 672 | ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE; |
0795af57 | 673 | printk(KERN_DEBUG "%s: authenticate with AP %s\n", |
f698d856 | 674 | sdata->dev->name, print_mac(mac, ifsta->bssid)); |
f0706e82 | 675 | |
f698d856 | 676 | ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0); |
f0706e82 JB |
677 | |
678 | mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT); | |
679 | } | |
680 | ||
36d16ae7 HS |
681 | static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss, |
682 | struct ieee80211_supported_band *sband, | |
683 | u64 *rates) | |
684 | { | |
685 | int i, j, count; | |
686 | *rates = 0; | |
687 | count = 0; | |
688 | for (i = 0; i < bss->supp_rates_len; i++) { | |
689 | int rate = (bss->supp_rates[i] & 0x7F) * 5; | |
690 | ||
691 | for (j = 0; j < sband->n_bitrates; j++) | |
692 | if (sband->bitrates[j].bitrate == rate) { | |
693 | *rates |= BIT(j); | |
694 | count++; | |
695 | break; | |
696 | } | |
697 | } | |
698 | ||
699 | return count; | |
700 | } | |
f0706e82 | 701 | |
f698d856 | 702 | static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
703 | struct ieee80211_if_sta *ifsta) |
704 | { | |
f698d856 | 705 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
706 | struct sk_buff *skb; |
707 | struct ieee80211_mgmt *mgmt; | |
708 | u8 *pos, *ies; | |
36d16ae7 | 709 | int i, len, count, rates_len, supp_rates_len; |
f0706e82 JB |
710 | u16 capab; |
711 | struct ieee80211_sta_bss *bss; | |
712 | int wmm = 0; | |
8318d78a | 713 | struct ieee80211_supported_band *sband; |
36d16ae7 | 714 | u64 rates = 0; |
f0706e82 JB |
715 | |
716 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
717 | sizeof(*mgmt) + 200 + ifsta->extra_ie_len + | |
718 | ifsta->ssid_len); | |
719 | if (!skb) { | |
720 | printk(KERN_DEBUG "%s: failed to allocate buffer for assoc " | |
f698d856 | 721 | "frame\n", sdata->dev->name); |
f0706e82 JB |
722 | return; |
723 | } | |
724 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
725 | ||
8318d78a JB |
726 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
727 | ||
f0706e82 | 728 | capab = ifsta->capab; |
8318d78a JB |
729 | |
730 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) { | |
731 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) | |
732 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; | |
733 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) | |
734 | capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; | |
f0706e82 | 735 | } |
8318d78a | 736 | |
f698d856 | 737 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
8318d78a | 738 | local->hw.conf.channel->center_freq, |
cffdd30d | 739 | ifsta->ssid, ifsta->ssid_len); |
f0706e82 JB |
740 | if (bss) { |
741 | if (bss->capability & WLAN_CAPABILITY_PRIVACY) | |
742 | capab |= WLAN_CAPABILITY_PRIVACY; | |
988c0f72 | 743 | if (bss->wmm_ie) |
f0706e82 | 744 | wmm = 1; |
0d580a77 HS |
745 | |
746 | /* get all rates supported by the device and the AP as | |
747 | * some APs don't like getting a superset of their rates | |
748 | * in the association request (e.g. D-Link DAP 1353 in | |
749 | * b-only mode) */ | |
750 | rates_len = ieee80211_compatible_rates(bss, sband, &rates); | |
751 | ||
06ff47bc TW |
752 | if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && |
753 | (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)) | |
754 | capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; | |
755 | ||
3e122be0 | 756 | ieee80211_rx_bss_put(local, bss); |
0d580a77 HS |
757 | } else { |
758 | rates = ~0; | |
759 | rates_len = sband->n_bitrates; | |
f0706e82 JB |
760 | } |
761 | ||
762 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
763 | memset(mgmt, 0, 24); | |
764 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
f698d856 | 765 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
f0706e82 JB |
766 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); |
767 | ||
d6f2da5b | 768 | if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) { |
f0706e82 | 769 | skb_put(skb, 10); |
e7827a70 HH |
770 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
771 | IEEE80211_STYPE_REASSOC_REQ); | |
f0706e82 | 772 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); |
ea95bba4 TW |
773 | mgmt->u.reassoc_req.listen_interval = |
774 | cpu_to_le16(local->hw.conf.listen_interval); | |
f0706e82 JB |
775 | memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid, |
776 | ETH_ALEN); | |
777 | } else { | |
778 | skb_put(skb, 4); | |
e7827a70 HH |
779 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
780 | IEEE80211_STYPE_ASSOC_REQ); | |
f0706e82 | 781 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); |
ea95bba4 TW |
782 | mgmt->u.reassoc_req.listen_interval = |
783 | cpu_to_le16(local->hw.conf.listen_interval); | |
f0706e82 JB |
784 | } |
785 | ||
786 | /* SSID */ | |
787 | ies = pos = skb_put(skb, 2 + ifsta->ssid_len); | |
788 | *pos++ = WLAN_EID_SSID; | |
789 | *pos++ = ifsta->ssid_len; | |
790 | memcpy(pos, ifsta->ssid, ifsta->ssid_len); | |
791 | ||
0d580a77 | 792 | /* add all rates which were marked to be used above */ |
36d16ae7 HS |
793 | supp_rates_len = rates_len; |
794 | if (supp_rates_len > 8) | |
795 | supp_rates_len = 8; | |
796 | ||
8318d78a | 797 | len = sband->n_bitrates; |
36d16ae7 | 798 | pos = skb_put(skb, supp_rates_len + 2); |
f0706e82 | 799 | *pos++ = WLAN_EID_SUPP_RATES; |
36d16ae7 | 800 | *pos++ = supp_rates_len; |
f0706e82 | 801 | |
36d16ae7 HS |
802 | count = 0; |
803 | for (i = 0; i < sband->n_bitrates; i++) { | |
804 | if (BIT(i) & rates) { | |
8318d78a | 805 | int rate = sband->bitrates[i].bitrate; |
f0706e82 | 806 | *pos++ = (u8) (rate / 5); |
36d16ae7 HS |
807 | if (++count == 8) |
808 | break; | |
809 | } | |
810 | } | |
811 | ||
812 | if (count == 8) { | |
813 | pos = skb_put(skb, rates_len - count + 2); | |
814 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
815 | *pos++ = rates_len - count; | |
816 | ||
817 | for (i++; i < sband->n_bitrates; i++) { | |
818 | if (BIT(i) & rates) { | |
819 | int rate = sband->bitrates[i].bitrate; | |
820 | *pos++ = (u8) (rate / 5); | |
821 | } | |
f0706e82 JB |
822 | } |
823 | } | |
824 | ||
06ff47bc TW |
825 | if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { |
826 | /* 1. power capabilities */ | |
827 | pos = skb_put(skb, 4); | |
828 | *pos++ = WLAN_EID_PWR_CAPABILITY; | |
829 | *pos++ = 2; | |
830 | *pos++ = 0; /* min tx power */ | |
831 | *pos++ = local->hw.conf.channel->max_power; /* max tx power */ | |
832 | ||
833 | /* 2. supported channels */ | |
834 | /* TODO: get this in reg domain format */ | |
835 | pos = skb_put(skb, 2 * sband->n_channels + 2); | |
836 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; | |
837 | *pos++ = 2 * sband->n_channels; | |
838 | for (i = 0; i < sband->n_channels; i++) { | |
839 | *pos++ = ieee80211_frequency_to_channel( | |
840 | sband->channels[i].center_freq); | |
841 | *pos++ = 1; /* one channel in the subband*/ | |
842 | } | |
843 | } | |
844 | ||
f0706e82 JB |
845 | if (ifsta->extra_ie) { |
846 | pos = skb_put(skb, ifsta->extra_ie_len); | |
847 | memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len); | |
848 | } | |
849 | ||
d6f2da5b | 850 | if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) { |
f0706e82 JB |
851 | pos = skb_put(skb, 9); |
852 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
853 | *pos++ = 7; /* len */ | |
854 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ | |
855 | *pos++ = 0x50; | |
856 | *pos++ = 0xf2; | |
857 | *pos++ = 2; /* WME */ | |
858 | *pos++ = 0; /* WME info */ | |
859 | *pos++ = 1; /* WME ver */ | |
860 | *pos++ = 0; | |
861 | } | |
3434fbd3 | 862 | |
c7153508 | 863 | /* wmm support is a must to HT */ |
3434fbd3 | 864 | if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) && |
9306102e EG |
865 | sband->ht_info.ht_supported && bss->ht_add_ie) { |
866 | struct ieee80211_ht_addt_info *ht_add_info = | |
867 | (struct ieee80211_ht_addt_info *)bss->ht_add_ie; | |
868 | u16 cap = sband->ht_info.cap; | |
869 | __le16 tmp; | |
870 | u32 flags = local->hw.conf.channel->flags; | |
871 | ||
872 | switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) { | |
873 | case IEEE80211_HT_IE_CHA_SEC_ABOVE: | |
874 | if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) { | |
875 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH; | |
876 | cap &= ~IEEE80211_HT_CAP_SGI_40; | |
877 | } | |
878 | break; | |
879 | case IEEE80211_HT_IE_CHA_SEC_BELOW: | |
880 | if (flags & IEEE80211_CHAN_NO_FAT_BELOW) { | |
881 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH; | |
882 | cap &= ~IEEE80211_HT_CAP_SGI_40; | |
883 | } | |
884 | break; | |
885 | } | |
886 | ||
887 | tmp = cpu_to_le16(cap); | |
c7153508 RR |
888 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2); |
889 | *pos++ = WLAN_EID_HT_CAPABILITY; | |
890 | *pos++ = sizeof(struct ieee80211_ht_cap); | |
891 | memset(pos, 0, sizeof(struct ieee80211_ht_cap)); | |
892 | memcpy(pos, &tmp, sizeof(u16)); | |
893 | pos += sizeof(u16); | |
8318d78a JB |
894 | /* TODO: needs a define here for << 2 */ |
895 | *pos++ = sband->ht_info.ampdu_factor | | |
896 | (sband->ht_info.ampdu_density << 2); | |
897 | memcpy(pos, sband->ht_info.supp_mcs_set, 16); | |
c7153508 | 898 | } |
f0706e82 JB |
899 | |
900 | kfree(ifsta->assocreq_ies); | |
901 | ifsta->assocreq_ies_len = (skb->data + skb->len) - ies; | |
0ec0b7ac | 902 | ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL); |
f0706e82 JB |
903 | if (ifsta->assocreq_ies) |
904 | memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len); | |
905 | ||
f698d856 | 906 | ieee80211_sta_tx(sdata, skb, 0); |
f0706e82 JB |
907 | } |
908 | ||
909 | ||
f698d856 | 910 | static void ieee80211_send_deauth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
911 | struct ieee80211_if_sta *ifsta, u16 reason) |
912 | { | |
f698d856 | 913 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
914 | struct sk_buff *skb; |
915 | struct ieee80211_mgmt *mgmt; | |
916 | ||
917 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); | |
918 | if (!skb) { | |
919 | printk(KERN_DEBUG "%s: failed to allocate buffer for deauth " | |
f698d856 | 920 | "frame\n", sdata->dev->name); |
f0706e82 JB |
921 | return; |
922 | } | |
923 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
924 | ||
925 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
926 | memset(mgmt, 0, 24); | |
927 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
f698d856 | 928 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
f0706e82 | 929 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); |
e7827a70 HH |
930 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
931 | IEEE80211_STYPE_DEAUTH); | |
f0706e82 JB |
932 | skb_put(skb, 2); |
933 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); | |
934 | ||
f698d856 | 935 | ieee80211_sta_tx(sdata, skb, 0); |
f0706e82 JB |
936 | } |
937 | ||
938 | ||
f698d856 | 939 | static void ieee80211_send_disassoc(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
940 | struct ieee80211_if_sta *ifsta, u16 reason) |
941 | { | |
f698d856 | 942 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
943 | struct sk_buff *skb; |
944 | struct ieee80211_mgmt *mgmt; | |
945 | ||
946 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); | |
947 | if (!skb) { | |
948 | printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc " | |
f698d856 | 949 | "frame\n", sdata->dev->name); |
f0706e82 JB |
950 | return; |
951 | } | |
952 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
953 | ||
954 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
955 | memset(mgmt, 0, 24); | |
956 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
f698d856 | 957 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
f0706e82 | 958 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); |
e7827a70 HH |
959 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
960 | IEEE80211_STYPE_DISASSOC); | |
f0706e82 JB |
961 | skb_put(skb, 2); |
962 | mgmt->u.disassoc.reason_code = cpu_to_le16(reason); | |
963 | ||
f698d856 | 964 | ieee80211_sta_tx(sdata, skb, 0); |
f0706e82 JB |
965 | } |
966 | ||
967 | ||
f698d856 | 968 | static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
969 | struct ieee80211_if_sta *ifsta) |
970 | { | |
f698d856 | 971 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 972 | struct ieee80211_sta_bss *bss; |
5b98b1f7 JB |
973 | int bss_privacy; |
974 | int wep_privacy; | |
975 | int privacy_invoked; | |
f0706e82 | 976 | |
5b98b1f7 | 977 | if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL)) |
f0706e82 JB |
978 | return 0; |
979 | ||
f698d856 | 980 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
8318d78a | 981 | local->hw.conf.channel->center_freq, |
cffdd30d | 982 | ifsta->ssid, ifsta->ssid_len); |
f0706e82 JB |
983 | if (!bss) |
984 | return 0; | |
985 | ||
5b98b1f7 | 986 | bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY); |
f698d856 | 987 | wep_privacy = !!ieee80211_sta_wep_configured(sdata); |
5b98b1f7 | 988 | privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED); |
f0706e82 | 989 | |
3e122be0 | 990 | ieee80211_rx_bss_put(local, bss); |
f0706e82 | 991 | |
5b98b1f7 JB |
992 | if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked)) |
993 | return 0; | |
994 | ||
995 | return 1; | |
f0706e82 JB |
996 | } |
997 | ||
998 | ||
f698d856 | 999 | static void ieee80211_associate(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1000 | struct ieee80211_if_sta *ifsta) |
1001 | { | |
0795af57 JP |
1002 | DECLARE_MAC_BUF(mac); |
1003 | ||
f0706e82 JB |
1004 | ifsta->assoc_tries++; |
1005 | if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) { | |
0795af57 | 1006 | printk(KERN_DEBUG "%s: association with AP %s" |
f0706e82 | 1007 | " timed out\n", |
f698d856 | 1008 | sdata->dev->name, print_mac(mac, ifsta->bssid)); |
48c2fc59 | 1009 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
f0706e82 JB |
1010 | return; |
1011 | } | |
1012 | ||
48c2fc59 | 1013 | ifsta->state = IEEE80211_STA_MLME_ASSOCIATE; |
0795af57 | 1014 | printk(KERN_DEBUG "%s: associate with AP %s\n", |
f698d856 JBG |
1015 | sdata->dev->name, print_mac(mac, ifsta->bssid)); |
1016 | if (ieee80211_privacy_mismatch(sdata, ifsta)) { | |
f0706e82 | 1017 | printk(KERN_DEBUG "%s: mismatch in privacy configuration and " |
f698d856 | 1018 | "mixed-cell disabled - abort association\n", sdata->dev->name); |
48c2fc59 | 1019 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
f0706e82 JB |
1020 | return; |
1021 | } | |
1022 | ||
f698d856 | 1023 | ieee80211_send_assoc(sdata, ifsta); |
f0706e82 JB |
1024 | |
1025 | mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT); | |
1026 | } | |
1027 | ||
1028 | ||
f698d856 | 1029 | static void ieee80211_associated(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1030 | struct ieee80211_if_sta *ifsta) |
1031 | { | |
f698d856 | 1032 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1033 | struct sta_info *sta; |
1034 | int disassoc; | |
0795af57 | 1035 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
1036 | |
1037 | /* TODO: start monitoring current AP signal quality and number of | |
1038 | * missed beacons. Scan other channels every now and then and search | |
1039 | * for better APs. */ | |
1040 | /* TODO: remove expired BSSes */ | |
1041 | ||
48c2fc59 | 1042 | ifsta->state = IEEE80211_STA_MLME_ASSOCIATED; |
f0706e82 | 1043 | |
d0709a65 JB |
1044 | rcu_read_lock(); |
1045 | ||
f0706e82 JB |
1046 | sta = sta_info_get(local, ifsta->bssid); |
1047 | if (!sta) { | |
0795af57 | 1048 | printk(KERN_DEBUG "%s: No STA entry for own AP %s\n", |
f698d856 | 1049 | sdata->dev->name, print_mac(mac, ifsta->bssid)); |
f0706e82 JB |
1050 | disassoc = 1; |
1051 | } else { | |
1052 | disassoc = 0; | |
1053 | if (time_after(jiffies, | |
1054 | sta->last_rx + IEEE80211_MONITORING_INTERVAL)) { | |
d6f2da5b | 1055 | if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) { |
f0706e82 | 1056 | printk(KERN_DEBUG "%s: No ProbeResp from " |
0795af57 | 1057 | "current AP %s - assume out of " |
f0706e82 | 1058 | "range\n", |
f698d856 | 1059 | sdata->dev->name, print_mac(mac, ifsta->bssid)); |
f0706e82 | 1060 | disassoc = 1; |
d0709a65 | 1061 | sta_info_unlink(&sta); |
d6f2da5b | 1062 | } else |
f698d856 | 1063 | ieee80211_send_probe_req(sdata, ifsta->bssid, |
f0706e82 JB |
1064 | local->scan_ssid, |
1065 | local->scan_ssid_len); | |
d6f2da5b | 1066 | ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL; |
f0706e82 | 1067 | } else { |
d6f2da5b | 1068 | ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL; |
f0706e82 JB |
1069 | if (time_after(jiffies, ifsta->last_probe + |
1070 | IEEE80211_PROBE_INTERVAL)) { | |
1071 | ifsta->last_probe = jiffies; | |
f698d856 | 1072 | ieee80211_send_probe_req(sdata, ifsta->bssid, |
f0706e82 JB |
1073 | ifsta->ssid, |
1074 | ifsta->ssid_len); | |
1075 | } | |
1076 | } | |
f0706e82 | 1077 | } |
d0709a65 JB |
1078 | |
1079 | rcu_read_unlock(); | |
1080 | ||
3b96766f | 1081 | if (disassoc && sta) |
d0709a65 | 1082 | sta_info_destroy(sta); |
d0709a65 | 1083 | |
f0706e82 | 1084 | if (disassoc) { |
48c2fc59 | 1085 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
f698d856 | 1086 | ieee80211_set_associated(sdata, ifsta, 0); |
f0706e82 JB |
1087 | } else { |
1088 | mod_timer(&ifsta->timer, jiffies + | |
1089 | IEEE80211_MONITORING_INTERVAL); | |
1090 | } | |
1091 | } | |
1092 | ||
1093 | ||
f698d856 | 1094 | static void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst, |
f0706e82 JB |
1095 | u8 *ssid, size_t ssid_len) |
1096 | { | |
f698d856 | 1097 | struct ieee80211_local *local = sdata->local; |
8318d78a | 1098 | struct ieee80211_supported_band *sband; |
f0706e82 JB |
1099 | struct sk_buff *skb; |
1100 | struct ieee80211_mgmt *mgmt; | |
1101 | u8 *pos, *supp_rates, *esupp_rates = NULL; | |
1102 | int i; | |
1103 | ||
1104 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200); | |
1105 | if (!skb) { | |
1106 | printk(KERN_DEBUG "%s: failed to allocate buffer for probe " | |
f698d856 | 1107 | "request\n", sdata->dev->name); |
f0706e82 JB |
1108 | return; |
1109 | } | |
1110 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1111 | ||
1112 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
1113 | memset(mgmt, 0, 24); | |
e7827a70 HH |
1114 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
1115 | IEEE80211_STYPE_PROBE_REQ); | |
f698d856 | 1116 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
f0706e82 JB |
1117 | if (dst) { |
1118 | memcpy(mgmt->da, dst, ETH_ALEN); | |
1119 | memcpy(mgmt->bssid, dst, ETH_ALEN); | |
1120 | } else { | |
1121 | memset(mgmt->da, 0xff, ETH_ALEN); | |
1122 | memset(mgmt->bssid, 0xff, ETH_ALEN); | |
1123 | } | |
1124 | pos = skb_put(skb, 2 + ssid_len); | |
1125 | *pos++ = WLAN_EID_SSID; | |
1126 | *pos++ = ssid_len; | |
1127 | memcpy(pos, ssid, ssid_len); | |
1128 | ||
1129 | supp_rates = skb_put(skb, 2); | |
1130 | supp_rates[0] = WLAN_EID_SUPP_RATES; | |
1131 | supp_rates[1] = 0; | |
8318d78a JB |
1132 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
1133 | ||
1134 | for (i = 0; i < sband->n_bitrates; i++) { | |
1135 | struct ieee80211_rate *rate = &sband->bitrates[i]; | |
f0706e82 JB |
1136 | if (esupp_rates) { |
1137 | pos = skb_put(skb, 1); | |
1138 | esupp_rates[1]++; | |
1139 | } else if (supp_rates[1] == 8) { | |
1140 | esupp_rates = skb_put(skb, 3); | |
1141 | esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES; | |
1142 | esupp_rates[1] = 1; | |
1143 | pos = &esupp_rates[2]; | |
1144 | } else { | |
1145 | pos = skb_put(skb, 1); | |
1146 | supp_rates[1]++; | |
1147 | } | |
8318d78a | 1148 | *pos = rate->bitrate / 5; |
f0706e82 JB |
1149 | } |
1150 | ||
f698d856 | 1151 | ieee80211_sta_tx(sdata, skb, 0); |
f0706e82 JB |
1152 | } |
1153 | ||
1154 | ||
f698d856 | 1155 | static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1156 | { |
f0706e82 | 1157 | if (!sdata || !sdata->default_key || |
8f20fc24 | 1158 | sdata->default_key->conf.alg != ALG_WEP) |
f0706e82 JB |
1159 | return 0; |
1160 | return 1; | |
1161 | } | |
1162 | ||
1163 | ||
f698d856 | 1164 | static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1165 | struct ieee80211_if_sta *ifsta) |
1166 | { | |
f698d856 | 1167 | printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name); |
d6f2da5b | 1168 | ifsta->flags |= IEEE80211_STA_AUTHENTICATED; |
f698d856 | 1169 | ieee80211_associate(sdata, ifsta); |
f0706e82 JB |
1170 | } |
1171 | ||
1172 | ||
f698d856 | 1173 | static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1174 | struct ieee80211_if_sta *ifsta, |
1175 | struct ieee80211_mgmt *mgmt, | |
1176 | size_t len) | |
1177 | { | |
1178 | u8 *pos; | |
1179 | struct ieee802_11_elems elems; | |
1180 | ||
f0706e82 | 1181 | pos = mgmt->u.auth.variable; |
67a4cce4 | 1182 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
f4ea83dd | 1183 | if (!elems.challenge) |
f0706e82 | 1184 | return; |
f698d856 | 1185 | ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2, |
f0706e82 JB |
1186 | elems.challenge_len + 2, 1); |
1187 | } | |
1188 | ||
f698d856 | 1189 | static void ieee80211_send_addba_resp(struct ieee80211_sub_if_data *sdata, u8 *da, u16 tid, |
9f985b0e RR |
1190 | u8 dialog_token, u16 status, u16 policy, |
1191 | u16 buf_size, u16 timeout) | |
1192 | { | |
9f985b0e | 1193 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
f698d856 | 1194 | struct ieee80211_local *local = sdata->local; |
9f985b0e RR |
1195 | struct sk_buff *skb; |
1196 | struct ieee80211_mgmt *mgmt; | |
1197 | u16 capab; | |
1198 | ||
3acea5b6 EK |
1199 | skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom); |
1200 | ||
9f985b0e RR |
1201 | if (!skb) { |
1202 | printk(KERN_DEBUG "%s: failed to allocate buffer " | |
f698d856 | 1203 | "for addba resp frame\n", sdata->dev->name); |
9f985b0e RR |
1204 | return; |
1205 | } | |
1206 | ||
1207 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1208 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
1209 | memset(mgmt, 0, 24); | |
1210 | memcpy(mgmt->da, da, ETH_ALEN); | |
f698d856 | 1211 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
51fb61e7 | 1212 | if (sdata->vif.type == IEEE80211_IF_TYPE_AP) |
f698d856 | 1213 | memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN); |
9f985b0e RR |
1214 | else |
1215 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
e7827a70 HH |
1216 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
1217 | IEEE80211_STYPE_ACTION); | |
9f985b0e RR |
1218 | |
1219 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp)); | |
1220 | mgmt->u.action.category = WLAN_CATEGORY_BACK; | |
1221 | mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP; | |
1222 | mgmt->u.action.u.addba_resp.dialog_token = dialog_token; | |
1223 | ||
1224 | capab = (u16)(policy << 1); /* bit 1 aggregation policy */ | |
1225 | capab |= (u16)(tid << 2); /* bit 5:2 TID number */ | |
1226 | capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */ | |
1227 | ||
1228 | mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab); | |
1229 | mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout); | |
1230 | mgmt->u.action.u.addba_resp.status = cpu_to_le16(status); | |
1231 | ||
f698d856 | 1232 | ieee80211_sta_tx(sdata, skb, 0); |
9f985b0e RR |
1233 | |
1234 | return; | |
1235 | } | |
1236 | ||
f698d856 | 1237 | void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata, const u8 *da, |
eadc8d9e RR |
1238 | u16 tid, u8 dialog_token, u16 start_seq_num, |
1239 | u16 agg_size, u16 timeout) | |
1240 | { | |
f698d856 | 1241 | struct ieee80211_local *local = sdata->local; |
eadc8d9e RR |
1242 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
1243 | struct sk_buff *skb; | |
1244 | struct ieee80211_mgmt *mgmt; | |
1245 | u16 capab; | |
1246 | ||
3acea5b6 | 1247 | skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom); |
eadc8d9e RR |
1248 | |
1249 | if (!skb) { | |
1250 | printk(KERN_ERR "%s: failed to allocate buffer " | |
f698d856 | 1251 | "for addba request frame\n", sdata->dev->name); |
eadc8d9e RR |
1252 | return; |
1253 | } | |
1254 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1255 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
1256 | memset(mgmt, 0, 24); | |
1257 | memcpy(mgmt->da, da, ETH_ALEN); | |
f698d856 | 1258 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
eadc8d9e | 1259 | if (sdata->vif.type == IEEE80211_IF_TYPE_AP) |
f698d856 | 1260 | memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN); |
eadc8d9e RR |
1261 | else |
1262 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
1263 | ||
e7827a70 HH |
1264 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
1265 | IEEE80211_STYPE_ACTION); | |
eadc8d9e RR |
1266 | |
1267 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req)); | |
1268 | ||
1269 | mgmt->u.action.category = WLAN_CATEGORY_BACK; | |
1270 | mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ; | |
1271 | ||
1272 | mgmt->u.action.u.addba_req.dialog_token = dialog_token; | |
1273 | capab = (u16)(1 << 1); /* bit 1 aggregation policy */ | |
1274 | capab |= (u16)(tid << 2); /* bit 5:2 TID number */ | |
1275 | capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */ | |
1276 | ||
1277 | mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab); | |
1278 | ||
1279 | mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout); | |
1280 | mgmt->u.action.u.addba_req.start_seq_num = | |
1281 | cpu_to_le16(start_seq_num << 4); | |
1282 | ||
f698d856 | 1283 | ieee80211_sta_tx(sdata, skb, 0); |
eadc8d9e RR |
1284 | } |
1285 | ||
f698d856 | 1286 | static void ieee80211_sta_process_addba_request(struct ieee80211_local *local, |
9f985b0e RR |
1287 | struct ieee80211_mgmt *mgmt, |
1288 | size_t len) | |
1289 | { | |
07db2183 RR |
1290 | struct ieee80211_hw *hw = &local->hw; |
1291 | struct ieee80211_conf *conf = &hw->conf; | |
9f985b0e | 1292 | struct sta_info *sta; |
07db2183 RR |
1293 | struct tid_ampdu_rx *tid_agg_rx; |
1294 | u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status; | |
9f985b0e | 1295 | u8 dialog_token; |
07db2183 RR |
1296 | int ret = -EOPNOTSUPP; |
1297 | DECLARE_MAC_BUF(mac); | |
9f985b0e | 1298 | |
d0709a65 JB |
1299 | rcu_read_lock(); |
1300 | ||
9f985b0e | 1301 | sta = sta_info_get(local, mgmt->sa); |
d0709a65 JB |
1302 | if (!sta) { |
1303 | rcu_read_unlock(); | |
9f985b0e | 1304 | return; |
d0709a65 | 1305 | } |
9f985b0e RR |
1306 | |
1307 | /* extract session parameters from addba request frame */ | |
1308 | dialog_token = mgmt->u.action.u.addba_req.dialog_token; | |
1309 | timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout); | |
07db2183 RR |
1310 | start_seq_num = |
1311 | le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4; | |
9f985b0e RR |
1312 | |
1313 | capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab); | |
1314 | ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1; | |
1315 | tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2; | |
1316 | buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6; | |
1317 | ||
9f985b0e RR |
1318 | status = WLAN_STATUS_REQUEST_DECLINED; |
1319 | ||
07db2183 RR |
1320 | /* sanity check for incoming parameters: |
1321 | * check if configuration can support the BA policy | |
1322 | * and if buffer size does not exceeds max value */ | |
1323 | if (((ba_policy != 1) | |
1324 | && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA))) | |
1325 | || (buf_size > IEEE80211_MAX_AMPDU_BUF)) { | |
1326 | status = WLAN_STATUS_INVALID_QOS_PARAM; | |
1327 | #ifdef CONFIG_MAC80211_HT_DEBUG | |
1328 | if (net_ratelimit()) | |
7b9d44cd | 1329 | printk(KERN_DEBUG "AddBA Req with bad params from " |
07db2183 RR |
1330 | "%s on tid %u. policy %d, buffer size %d\n", |
1331 | print_mac(mac, mgmt->sa), tid, ba_policy, | |
1332 | buf_size); | |
1333 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1334 | goto end_no_lock; | |
1335 | } | |
1336 | /* determine default buffer size */ | |
1337 | if (buf_size == 0) { | |
8318d78a JB |
1338 | struct ieee80211_supported_band *sband; |
1339 | ||
1340 | sband = local->hw.wiphy->bands[conf->channel->band]; | |
07db2183 | 1341 | buf_size = IEEE80211_MIN_AMPDU_BUF; |
8318d78a | 1342 | buf_size = buf_size << sband->ht_info.ampdu_factor; |
07db2183 RR |
1343 | } |
1344 | ||
07db2183 RR |
1345 | |
1346 | /* examine state machine */ | |
07346f81 | 1347 | spin_lock_bh(&sta->lock); |
07db2183 | 1348 | |
cee24a3e | 1349 | if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) { |
07db2183 RR |
1350 | #ifdef CONFIG_MAC80211_HT_DEBUG |
1351 | if (net_ratelimit()) | |
7b9d44cd | 1352 | printk(KERN_DEBUG "unexpected AddBA Req from " |
07db2183 RR |
1353 | "%s on tid %u\n", |
1354 | print_mac(mac, mgmt->sa), tid); | |
1355 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1356 | goto end; | |
1357 | } | |
1358 | ||
cee24a3e RR |
1359 | /* prepare A-MPDU MLME for Rx aggregation */ |
1360 | sta->ampdu_mlme.tid_rx[tid] = | |
1361 | kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC); | |
1362 | if (!sta->ampdu_mlme.tid_rx[tid]) { | |
f4ea83dd | 1363 | #ifdef CONFIG_MAC80211_HT_DEBUG |
cee24a3e RR |
1364 | if (net_ratelimit()) |
1365 | printk(KERN_ERR "allocate rx mlme to tid %d failed\n", | |
1366 | tid); | |
f4ea83dd | 1367 | #endif |
cee24a3e RR |
1368 | goto end; |
1369 | } | |
1370 | /* rx timer */ | |
1371 | sta->ampdu_mlme.tid_rx[tid]->session_timer.function = | |
1372 | sta_rx_agg_session_timer_expired; | |
1373 | sta->ampdu_mlme.tid_rx[tid]->session_timer.data = | |
1374 | (unsigned long)&sta->timer_to_tid[tid]; | |
1375 | init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer); | |
1376 | ||
1377 | tid_agg_rx = sta->ampdu_mlme.tid_rx[tid]; | |
1378 | ||
07db2183 RR |
1379 | /* prepare reordering buffer */ |
1380 | tid_agg_rx->reorder_buf = | |
c97c23e3 | 1381 | kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC); |
03147dfc | 1382 | if (!tid_agg_rx->reorder_buf) { |
f4ea83dd | 1383 | #ifdef CONFIG_MAC80211_HT_DEBUG |
03147dfc JB |
1384 | if (net_ratelimit()) |
1385 | printk(KERN_ERR "can not allocate reordering buffer " | |
1386 | "to tid %d\n", tid); | |
f4ea83dd | 1387 | #endif |
cee24a3e | 1388 | kfree(sta->ampdu_mlme.tid_rx[tid]); |
07db2183 RR |
1389 | goto end; |
1390 | } | |
1391 | memset(tid_agg_rx->reorder_buf, 0, | |
c97c23e3 | 1392 | buf_size * sizeof(struct sk_buff *)); |
07db2183 RR |
1393 | |
1394 | if (local->ops->ampdu_action) | |
1395 | ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START, | |
0df3ef45 | 1396 | sta->addr, tid, &start_seq_num); |
07db2183 | 1397 | #ifdef CONFIG_MAC80211_HT_DEBUG |
513a1025 | 1398 | printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret); |
07db2183 RR |
1399 | #endif /* CONFIG_MAC80211_HT_DEBUG */ |
1400 | ||
1401 | if (ret) { | |
1402 | kfree(tid_agg_rx->reorder_buf); | |
cee24a3e RR |
1403 | kfree(tid_agg_rx); |
1404 | sta->ampdu_mlme.tid_rx[tid] = NULL; | |
07db2183 RR |
1405 | goto end; |
1406 | } | |
1407 | ||
1408 | /* change state and send addba resp */ | |
cee24a3e | 1409 | sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL; |
07db2183 RR |
1410 | tid_agg_rx->dialog_token = dialog_token; |
1411 | tid_agg_rx->ssn = start_seq_num; | |
1412 | tid_agg_rx->head_seq_num = start_seq_num; | |
1413 | tid_agg_rx->buf_size = buf_size; | |
1414 | tid_agg_rx->timeout = timeout; | |
1415 | tid_agg_rx->stored_mpdu_num = 0; | |
1416 | status = WLAN_STATUS_SUCCESS; | |
1417 | end: | |
07346f81 | 1418 | spin_unlock_bh(&sta->lock); |
07db2183 RR |
1419 | |
1420 | end_no_lock: | |
f698d856 | 1421 | ieee80211_send_addba_resp(sta->sdata, sta->addr, tid, |
d0709a65 JB |
1422 | dialog_token, status, 1, buf_size, timeout); |
1423 | rcu_read_unlock(); | |
9f985b0e | 1424 | } |
f0706e82 | 1425 | |
f698d856 | 1426 | static void ieee80211_sta_process_addba_resp(struct ieee80211_local *local, |
eadc8d9e RR |
1427 | struct ieee80211_mgmt *mgmt, |
1428 | size_t len) | |
1429 | { | |
eadc8d9e RR |
1430 | struct ieee80211_hw *hw = &local->hw; |
1431 | struct sta_info *sta; | |
1432 | u16 capab; | |
1433 | u16 tid; | |
1434 | u8 *state; | |
1435 | ||
d0709a65 JB |
1436 | rcu_read_lock(); |
1437 | ||
eadc8d9e | 1438 | sta = sta_info_get(local, mgmt->sa); |
d0709a65 JB |
1439 | if (!sta) { |
1440 | rcu_read_unlock(); | |
eadc8d9e | 1441 | return; |
d0709a65 | 1442 | } |
eadc8d9e RR |
1443 | |
1444 | capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab); | |
1445 | tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2; | |
1446 | ||
cee24a3e | 1447 | state = &sta->ampdu_mlme.tid_state_tx[tid]; |
eadc8d9e | 1448 | |
07346f81 | 1449 | spin_lock_bh(&sta->lock); |
eadc8d9e | 1450 | |
cee24a3e | 1451 | if (!(*state & HT_ADDBA_REQUESTED_MSK)) { |
07346f81 | 1452 | spin_unlock_bh(&sta->lock); |
cee24a3e RR |
1453 | goto addba_resp_exit; |
1454 | } | |
1455 | ||
eadc8d9e | 1456 | if (mgmt->u.action.u.addba_resp.dialog_token != |
cee24a3e | 1457 | sta->ampdu_mlme.tid_tx[tid]->dialog_token) { |
07346f81 | 1458 | spin_unlock_bh(&sta->lock); |
eadc8d9e RR |
1459 | #ifdef CONFIG_MAC80211_HT_DEBUG |
1460 | printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid); | |
1461 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
cee24a3e | 1462 | goto addba_resp_exit; |
eadc8d9e RR |
1463 | } |
1464 | ||
cee24a3e | 1465 | del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer); |
eadc8d9e RR |
1466 | #ifdef CONFIG_MAC80211_HT_DEBUG |
1467 | printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid); | |
1468 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1469 | if (le16_to_cpu(mgmt->u.action.u.addba_resp.status) | |
1470 | == WLAN_STATUS_SUCCESS) { | |
eadc8d9e | 1471 | *state |= HT_ADDBA_RECEIVED_MSK; |
cee24a3e | 1472 | sta->ampdu_mlme.addba_req_num[tid] = 0; |
eadc8d9e | 1473 | |
f4ea83dd | 1474 | if (*state == HT_AGG_STATE_OPERATIONAL) |
eadc8d9e | 1475 | ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]); |
eadc8d9e | 1476 | |
07346f81 | 1477 | spin_unlock_bh(&sta->lock); |
eadc8d9e | 1478 | } else { |
cee24a3e | 1479 | sta->ampdu_mlme.addba_req_num[tid]++; |
eadc8d9e RR |
1480 | /* this will allow the state check in stop_BA_session */ |
1481 | *state = HT_AGG_STATE_OPERATIONAL; | |
07346f81 | 1482 | spin_unlock_bh(&sta->lock); |
eadc8d9e RR |
1483 | ieee80211_stop_tx_ba_session(hw, sta->addr, tid, |
1484 | WLAN_BACK_INITIATOR); | |
1485 | } | |
cee24a3e RR |
1486 | |
1487 | addba_resp_exit: | |
d0709a65 | 1488 | rcu_read_unlock(); |
eadc8d9e RR |
1489 | } |
1490 | ||
f698d856 | 1491 | void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata, const u8 *da, u16 tid, |
eadc8d9e | 1492 | u16 initiator, u16 reason_code) |
07db2183 | 1493 | { |
f698d856 | 1494 | struct ieee80211_local *local = sdata->local; |
07db2183 RR |
1495 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
1496 | struct sk_buff *skb; | |
1497 | struct ieee80211_mgmt *mgmt; | |
1498 | u16 params; | |
1499 | ||
3acea5b6 | 1500 | skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom); |
07db2183 RR |
1501 | |
1502 | if (!skb) { | |
1503 | printk(KERN_ERR "%s: failed to allocate buffer " | |
f698d856 | 1504 | "for delba frame\n", sdata->dev->name); |
07db2183 RR |
1505 | return; |
1506 | } | |
1507 | ||
1508 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1509 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
1510 | memset(mgmt, 0, 24); | |
1511 | memcpy(mgmt->da, da, ETH_ALEN); | |
f698d856 | 1512 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
51fb61e7 | 1513 | if (sdata->vif.type == IEEE80211_IF_TYPE_AP) |
f698d856 | 1514 | memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN); |
07db2183 RR |
1515 | else |
1516 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
e7827a70 HH |
1517 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
1518 | IEEE80211_STYPE_ACTION); | |
07db2183 RR |
1519 | |
1520 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba)); | |
1521 | ||
1522 | mgmt->u.action.category = WLAN_CATEGORY_BACK; | |
1523 | mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA; | |
1524 | params = (u16)(initiator << 11); /* bit 11 initiator */ | |
1525 | params |= (u16)(tid << 12); /* bit 15:12 TID number */ | |
1526 | ||
1527 | mgmt->u.action.u.delba.params = cpu_to_le16(params); | |
1528 | mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code); | |
1529 | ||
f698d856 | 1530 | ieee80211_sta_tx(sdata, skb, 0); |
07db2183 RR |
1531 | } |
1532 | ||
f698d856 | 1533 | void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn) |
429a3805 | 1534 | { |
f698d856 | 1535 | struct ieee80211_local *local = sdata->local; |
429a3805 RR |
1536 | struct sk_buff *skb; |
1537 | struct ieee80211_bar *bar; | |
1538 | u16 bar_control = 0; | |
1539 | ||
1540 | skb = dev_alloc_skb(sizeof(*bar) + local->hw.extra_tx_headroom); | |
1541 | if (!skb) { | |
1542 | printk(KERN_ERR "%s: failed to allocate buffer for " | |
f698d856 | 1543 | "bar frame\n", sdata->dev->name); |
429a3805 RR |
1544 | return; |
1545 | } | |
1546 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1547 | bar = (struct ieee80211_bar *)skb_put(skb, sizeof(*bar)); | |
1548 | memset(bar, 0, sizeof(*bar)); | |
e7827a70 HH |
1549 | bar->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | |
1550 | IEEE80211_STYPE_BACK_REQ); | |
429a3805 | 1551 | memcpy(bar->ra, ra, ETH_ALEN); |
f698d856 | 1552 | memcpy(bar->ta, sdata->dev->dev_addr, ETH_ALEN); |
429a3805 RR |
1553 | bar_control |= (u16)IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL; |
1554 | bar_control |= (u16)IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA; | |
1555 | bar_control |= (u16)(tid << 12); | |
1556 | bar->control = cpu_to_le16(bar_control); | |
1557 | bar->start_seq_num = cpu_to_le16(ssn); | |
1558 | ||
f698d856 | 1559 | ieee80211_sta_tx(sdata, skb, 0); |
429a3805 RR |
1560 | } |
1561 | ||
f698d856 | 1562 | void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, |
07db2183 RR |
1563 | u16 initiator, u16 reason) |
1564 | { | |
f698d856 | 1565 | struct ieee80211_local *local = sdata->local; |
07db2183 RR |
1566 | struct ieee80211_hw *hw = &local->hw; |
1567 | struct sta_info *sta; | |
b580781e | 1568 | int ret, i; |
513a1025 | 1569 | DECLARE_MAC_BUF(mac); |
07db2183 | 1570 | |
d0709a65 JB |
1571 | rcu_read_lock(); |
1572 | ||
07db2183 | 1573 | sta = sta_info_get(local, ra); |
d0709a65 JB |
1574 | if (!sta) { |
1575 | rcu_read_unlock(); | |
07db2183 | 1576 | return; |
d0709a65 | 1577 | } |
07db2183 RR |
1578 | |
1579 | /* check if TID is in operational state */ | |
07346f81 | 1580 | spin_lock_bh(&sta->lock); |
cee24a3e | 1581 | if (sta->ampdu_mlme.tid_state_rx[tid] |
07db2183 | 1582 | != HT_AGG_STATE_OPERATIONAL) { |
07346f81 | 1583 | spin_unlock_bh(&sta->lock); |
d0709a65 | 1584 | rcu_read_unlock(); |
07db2183 RR |
1585 | return; |
1586 | } | |
cee24a3e | 1587 | sta->ampdu_mlme.tid_state_rx[tid] = |
07db2183 RR |
1588 | HT_AGG_STATE_REQ_STOP_BA_MSK | |
1589 | (initiator << HT_AGG_STATE_INITIATOR_SHIFT); | |
07346f81 | 1590 | spin_unlock_bh(&sta->lock); |
07db2183 RR |
1591 | |
1592 | /* stop HW Rx aggregation. ampdu_action existence | |
1593 | * already verified in session init so we add the BUG_ON */ | |
1594 | BUG_ON(!local->ops->ampdu_action); | |
1595 | ||
513a1025 RR |
1596 | #ifdef CONFIG_MAC80211_HT_DEBUG |
1597 | printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n", | |
1598 | print_mac(mac, ra), tid); | |
1599 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1600 | ||
07db2183 | 1601 | ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP, |
0df3ef45 | 1602 | ra, tid, NULL); |
07db2183 RR |
1603 | if (ret) |
1604 | printk(KERN_DEBUG "HW problem - can not stop rx " | |
f4ea83dd | 1605 | "aggregation for tid %d\n", tid); |
07db2183 RR |
1606 | |
1607 | /* shutdown timer has not expired */ | |
1608 | if (initiator != WLAN_BACK_TIMER) | |
cee24a3e | 1609 | del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer); |
07db2183 RR |
1610 | |
1611 | /* check if this is a self generated aggregation halt */ | |
1612 | if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER) | |
f698d856 | 1613 | ieee80211_send_delba(sdata, ra, tid, 0, reason); |
07db2183 RR |
1614 | |
1615 | /* free the reordering buffer */ | |
cee24a3e RR |
1616 | for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) { |
1617 | if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) { | |
b580781e | 1618 | /* release the reordered frames */ |
cee24a3e RR |
1619 | dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]); |
1620 | sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--; | |
1621 | sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL; | |
b580781e RR |
1622 | } |
1623 | } | |
cee24a3e RR |
1624 | /* free resources */ |
1625 | kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf); | |
1626 | kfree(sta->ampdu_mlme.tid_rx[tid]); | |
1627 | sta->ampdu_mlme.tid_rx[tid] = NULL; | |
1628 | sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE; | |
07db2183 | 1629 | |
d0709a65 | 1630 | rcu_read_unlock(); |
07db2183 RR |
1631 | } |
1632 | ||
eadc8d9e | 1633 | |
f698d856 | 1634 | static void ieee80211_sta_process_delba(struct ieee80211_sub_if_data *sdata, |
688b88a4 RR |
1635 | struct ieee80211_mgmt *mgmt, size_t len) |
1636 | { | |
f698d856 | 1637 | struct ieee80211_local *local = sdata->local; |
688b88a4 RR |
1638 | struct sta_info *sta; |
1639 | u16 tid, params; | |
1640 | u16 initiator; | |
1641 | DECLARE_MAC_BUF(mac); | |
1642 | ||
d0709a65 JB |
1643 | rcu_read_lock(); |
1644 | ||
688b88a4 | 1645 | sta = sta_info_get(local, mgmt->sa); |
d0709a65 JB |
1646 | if (!sta) { |
1647 | rcu_read_unlock(); | |
688b88a4 | 1648 | return; |
d0709a65 | 1649 | } |
688b88a4 RR |
1650 | |
1651 | params = le16_to_cpu(mgmt->u.action.u.delba.params); | |
1652 | tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12; | |
1653 | initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11; | |
1654 | ||
1655 | #ifdef CONFIG_MAC80211_HT_DEBUG | |
1656 | if (net_ratelimit()) | |
d92684e6 RR |
1657 | printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n", |
1658 | print_mac(mac, mgmt->sa), | |
2e354ed7 | 1659 | initiator ? "initiator" : "recipient", tid, |
688b88a4 RR |
1660 | mgmt->u.action.u.delba.reason_code); |
1661 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1662 | ||
1663 | if (initiator == WLAN_BACK_INITIATOR) | |
f698d856 | 1664 | ieee80211_sta_stop_rx_ba_session(sdata, sta->addr, tid, |
688b88a4 | 1665 | WLAN_BACK_INITIATOR, 0); |
d92684e6 | 1666 | else { /* WLAN_BACK_RECIPIENT */ |
07346f81 | 1667 | spin_lock_bh(&sta->lock); |
cee24a3e | 1668 | sta->ampdu_mlme.tid_state_tx[tid] = |
d92684e6 | 1669 | HT_AGG_STATE_OPERATIONAL; |
07346f81 | 1670 | spin_unlock_bh(&sta->lock); |
d92684e6 RR |
1671 | ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid, |
1672 | WLAN_BACK_RECIPIENT); | |
1673 | } | |
d0709a65 | 1674 | rcu_read_unlock(); |
688b88a4 RR |
1675 | } |
1676 | ||
eadc8d9e RR |
1677 | /* |
1678 | * After sending add Block Ack request we activated a timer until | |
1679 | * add Block Ack response will arrive from the recipient. | |
1680 | * If this timer expires sta_addba_resp_timer_expired will be executed. | |
1681 | */ | |
1682 | void sta_addba_resp_timer_expired(unsigned long data) | |
1683 | { | |
1684 | /* not an elegant detour, but there is no choice as the timer passes | |
1685 | * only one argument, and both sta_info and TID are needed, so init | |
73651ee6 | 1686 | * flow in sta_info_create gives the TID as data, while the timer_to_id |
eadc8d9e | 1687 | * array gives the sta through container_of */ |
70d251b2 | 1688 | u16 tid = *(u8 *)data; |
eadc8d9e RR |
1689 | struct sta_info *temp_sta = container_of((void *)data, |
1690 | struct sta_info, timer_to_tid[tid]); | |
1691 | ||
1692 | struct ieee80211_local *local = temp_sta->local; | |
1693 | struct ieee80211_hw *hw = &local->hw; | |
1694 | struct sta_info *sta; | |
1695 | u8 *state; | |
1696 | ||
d0709a65 JB |
1697 | rcu_read_lock(); |
1698 | ||
eadc8d9e | 1699 | sta = sta_info_get(local, temp_sta->addr); |
d0709a65 JB |
1700 | if (!sta) { |
1701 | rcu_read_unlock(); | |
eadc8d9e | 1702 | return; |
d0709a65 | 1703 | } |
eadc8d9e | 1704 | |
cee24a3e | 1705 | state = &sta->ampdu_mlme.tid_state_tx[tid]; |
eadc8d9e | 1706 | /* check if the TID waits for addBA response */ |
07346f81 | 1707 | spin_lock_bh(&sta->lock); |
eadc8d9e | 1708 | if (!(*state & HT_ADDBA_REQUESTED_MSK)) { |
07346f81 | 1709 | spin_unlock_bh(&sta->lock); |
eadc8d9e | 1710 | *state = HT_AGG_STATE_IDLE; |
f4ea83dd | 1711 | #ifdef CONFIG_MAC80211_HT_DEBUG |
eadc8d9e RR |
1712 | printk(KERN_DEBUG "timer expired on tid %d but we are not " |
1713 | "expecting addBA response there", tid); | |
f4ea83dd | 1714 | #endif |
eadc8d9e RR |
1715 | goto timer_expired_exit; |
1716 | } | |
1717 | ||
f4ea83dd | 1718 | #ifdef CONFIG_MAC80211_HT_DEBUG |
eadc8d9e | 1719 | printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid); |
f4ea83dd | 1720 | #endif |
eadc8d9e RR |
1721 | |
1722 | /* go through the state check in stop_BA_session */ | |
1723 | *state = HT_AGG_STATE_OPERATIONAL; | |
07346f81 | 1724 | spin_unlock_bh(&sta->lock); |
eadc8d9e RR |
1725 | ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid, |
1726 | WLAN_BACK_INITIATOR); | |
1727 | ||
1728 | timer_expired_exit: | |
d0709a65 | 1729 | rcu_read_unlock(); |
eadc8d9e RR |
1730 | } |
1731 | ||
07db2183 | 1732 | /* |
7b9d44cd RR |
1733 | * After accepting the AddBA Request we activated a timer, |
1734 | * resetting it after each frame that arrives from the originator. | |
07db2183 RR |
1735 | * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed. |
1736 | */ | |
712590de | 1737 | static void sta_rx_agg_session_timer_expired(unsigned long data) |
07db2183 RR |
1738 | { |
1739 | /* not an elegant detour, but there is no choice as the timer passes | |
70d251b2 | 1740 | * only one argument, and various sta_info are needed here, so init |
73651ee6 | 1741 | * flow in sta_info_create gives the TID as data, while the timer_to_id |
07db2183 RR |
1742 | * array gives the sta through container_of */ |
1743 | u8 *ptid = (u8 *)data; | |
1744 | u8 *timer_to_id = ptid - *ptid; | |
1745 | struct sta_info *sta = container_of(timer_to_id, struct sta_info, | |
1746 | timer_to_tid[0]); | |
1747 | ||
f4ea83dd | 1748 | #ifdef CONFIG_MAC80211_HT_DEBUG |
07db2183 | 1749 | printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid); |
f4ea83dd | 1750 | #endif |
f698d856 | 1751 | ieee80211_sta_stop_rx_ba_session(sta->sdata, sta->addr, |
d0709a65 | 1752 | (u16)*ptid, WLAN_BACK_TIMER, |
07db2183 RR |
1753 | WLAN_REASON_QSTA_TIMEOUT); |
1754 | } | |
1755 | ||
f698d856 | 1756 | void ieee80211_sta_tear_down_BA_sessions(struct ieee80211_sub_if_data *sdata, u8 *addr) |
85249e5f | 1757 | { |
f698d856 | 1758 | struct ieee80211_local *local = sdata->local; |
85249e5f RR |
1759 | int i; |
1760 | ||
1761 | for (i = 0; i < STA_TID_NUM; i++) { | |
1762 | ieee80211_stop_tx_ba_session(&local->hw, addr, i, | |
1763 | WLAN_BACK_INITIATOR); | |
f698d856 | 1764 | ieee80211_sta_stop_rx_ba_session(sdata, addr, i, |
85249e5f RR |
1765 | WLAN_BACK_RECIPIENT, |
1766 | WLAN_REASON_QSTA_LEAVE_QBSS); | |
1767 | } | |
1768 | } | |
07db2183 | 1769 | |
f698d856 | 1770 | static void ieee80211_send_refuse_measurement_request(struct ieee80211_sub_if_data *sdata, |
b6623486 AK |
1771 | struct ieee80211_msrment_ie *request_ie, |
1772 | const u8 *da, const u8 *bssid, | |
1773 | u8 dialog_token) | |
1774 | { | |
f698d856 | 1775 | struct ieee80211_local *local = sdata->local; |
b6623486 AK |
1776 | struct sk_buff *skb; |
1777 | struct ieee80211_mgmt *msr_report; | |
1778 | ||
1779 | skb = dev_alloc_skb(sizeof(*msr_report) + local->hw.extra_tx_headroom + | |
1780 | sizeof(struct ieee80211_msrment_ie)); | |
1781 | ||
1782 | if (!skb) { | |
1783 | printk(KERN_ERR "%s: failed to allocate buffer for " | |
f698d856 | 1784 | "measurement report frame\n", sdata->dev->name); |
b6623486 AK |
1785 | return; |
1786 | } | |
1787 | ||
1788 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1789 | msr_report = (struct ieee80211_mgmt *)skb_put(skb, 24); | |
1790 | memset(msr_report, 0, 24); | |
1791 | memcpy(msr_report->da, da, ETH_ALEN); | |
f698d856 | 1792 | memcpy(msr_report->sa, sdata->dev->dev_addr, ETH_ALEN); |
b6623486 | 1793 | memcpy(msr_report->bssid, bssid, ETH_ALEN); |
e7827a70 | 1794 | msr_report->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
b6623486 AK |
1795 | IEEE80211_STYPE_ACTION); |
1796 | ||
1797 | skb_put(skb, 1 + sizeof(msr_report->u.action.u.measurement)); | |
1798 | msr_report->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT; | |
1799 | msr_report->u.action.u.measurement.action_code = | |
1800 | WLAN_ACTION_SPCT_MSR_RPRT; | |
1801 | msr_report->u.action.u.measurement.dialog_token = dialog_token; | |
1802 | ||
1803 | msr_report->u.action.u.measurement.element_id = WLAN_EID_MEASURE_REPORT; | |
1804 | msr_report->u.action.u.measurement.length = | |
1805 | sizeof(struct ieee80211_msrment_ie); | |
1806 | ||
1807 | memset(&msr_report->u.action.u.measurement.msr_elem, 0, | |
1808 | sizeof(struct ieee80211_msrment_ie)); | |
1809 | msr_report->u.action.u.measurement.msr_elem.token = request_ie->token; | |
1810 | msr_report->u.action.u.measurement.msr_elem.mode |= | |
1811 | IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED; | |
1812 | msr_report->u.action.u.measurement.msr_elem.type = request_ie->type; | |
1813 | ||
f698d856 | 1814 | ieee80211_sta_tx(sdata, skb, 0); |
b6623486 AK |
1815 | } |
1816 | ||
f698d856 | 1817 | static void ieee80211_sta_process_measurement_req(struct ieee80211_sub_if_data *sdata, |
b6623486 AK |
1818 | struct ieee80211_mgmt *mgmt, |
1819 | size_t len) | |
1820 | { | |
1821 | /* | |
1822 | * Ignoring measurement request is spec violation. | |
1823 | * Mandatory measurements must be reported optional | |
1824 | * measurements might be refused or reported incapable | |
1825 | * For now just refuse | |
1826 | * TODO: Answer basic measurement as unmeasured | |
1827 | */ | |
f698d856 | 1828 | ieee80211_send_refuse_measurement_request(sdata, |
b6623486 AK |
1829 | &mgmt->u.action.u.measurement.msr_elem, |
1830 | mgmt->sa, mgmt->bssid, | |
1831 | mgmt->u.action.u.measurement.dialog_token); | |
1832 | } | |
1833 | ||
1834 | ||
f698d856 | 1835 | static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1836 | struct ieee80211_if_sta *ifsta, |
1837 | struct ieee80211_mgmt *mgmt, | |
1838 | size_t len) | |
1839 | { | |
f0706e82 | 1840 | u16 auth_alg, auth_transaction, status_code; |
0795af57 | 1841 | DECLARE_MAC_BUF(mac); |
f0706e82 | 1842 | |
48c2fc59 | 1843 | if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE && |
f4ea83dd | 1844 | sdata->vif.type != IEEE80211_IF_TYPE_IBSS) |
f0706e82 | 1845 | return; |
f0706e82 | 1846 | |
f4ea83dd | 1847 | if (len < 24 + 6) |
f0706e82 | 1848 | return; |
f0706e82 | 1849 | |
51fb61e7 | 1850 | if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS && |
f4ea83dd | 1851 | memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1852 | return; |
f0706e82 | 1853 | |
51fb61e7 | 1854 | if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS && |
f4ea83dd | 1855 | memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) |
f0706e82 | 1856 | return; |
f0706e82 JB |
1857 | |
1858 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
1859 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
1860 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
1861 | ||
51fb61e7 | 1862 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) { |
135a2110 JB |
1863 | /* |
1864 | * IEEE 802.11 standard does not require authentication in IBSS | |
f0706e82 JB |
1865 | * networks and most implementations do not seem to use it. |
1866 | * However, try to reply to authentication attempts if someone | |
1867 | * has actually implemented this. | |
135a2110 | 1868 | */ |
f4ea83dd | 1869 | if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) |
f0706e82 | 1870 | return; |
f698d856 | 1871 | ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0); |
f0706e82 JB |
1872 | } |
1873 | ||
1874 | if (auth_alg != ifsta->auth_alg || | |
f4ea83dd | 1875 | auth_transaction != ifsta->auth_transaction) |
f0706e82 | 1876 | return; |
f0706e82 JB |
1877 | |
1878 | if (status_code != WLAN_STATUS_SUCCESS) { | |
f0706e82 JB |
1879 | if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) { |
1880 | u8 algs[3]; | |
1881 | const int num_algs = ARRAY_SIZE(algs); | |
1882 | int i, pos; | |
1883 | algs[0] = algs[1] = algs[2] = 0xff; | |
1884 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
1885 | algs[0] = WLAN_AUTH_OPEN; | |
1886 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
1887 | algs[1] = WLAN_AUTH_SHARED_KEY; | |
1888 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
1889 | algs[2] = WLAN_AUTH_LEAP; | |
1890 | if (ifsta->auth_alg == WLAN_AUTH_OPEN) | |
1891 | pos = 0; | |
1892 | else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY) | |
1893 | pos = 1; | |
1894 | else | |
1895 | pos = 2; | |
1896 | for (i = 0; i < num_algs; i++) { | |
1897 | pos++; | |
1898 | if (pos >= num_algs) | |
1899 | pos = 0; | |
1900 | if (algs[pos] == ifsta->auth_alg || | |
1901 | algs[pos] == 0xff) | |
1902 | continue; | |
1903 | if (algs[pos] == WLAN_AUTH_SHARED_KEY && | |
f698d856 | 1904 | !ieee80211_sta_wep_configured(sdata)) |
f0706e82 JB |
1905 | continue; |
1906 | ifsta->auth_alg = algs[pos]; | |
f0706e82 JB |
1907 | break; |
1908 | } | |
1909 | } | |
1910 | return; | |
1911 | } | |
1912 | ||
1913 | switch (ifsta->auth_alg) { | |
1914 | case WLAN_AUTH_OPEN: | |
1915 | case WLAN_AUTH_LEAP: | |
f698d856 | 1916 | ieee80211_auth_completed(sdata, ifsta); |
f0706e82 JB |
1917 | break; |
1918 | case WLAN_AUTH_SHARED_KEY: | |
1919 | if (ifsta->auth_transaction == 4) | |
f698d856 | 1920 | ieee80211_auth_completed(sdata, ifsta); |
f0706e82 | 1921 | else |
f698d856 | 1922 | ieee80211_auth_challenge(sdata, ifsta, mgmt, len); |
f0706e82 JB |
1923 | break; |
1924 | } | |
1925 | } | |
1926 | ||
1927 | ||
f698d856 | 1928 | static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1929 | struct ieee80211_if_sta *ifsta, |
1930 | struct ieee80211_mgmt *mgmt, | |
1931 | size_t len) | |
1932 | { | |
1933 | u16 reason_code; | |
0795af57 | 1934 | DECLARE_MAC_BUF(mac); |
f0706e82 | 1935 | |
f4ea83dd | 1936 | if (len < 24 + 2) |
f0706e82 | 1937 | return; |
f0706e82 | 1938 | |
f4ea83dd | 1939 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1940 | return; |
f0706e82 JB |
1941 | |
1942 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
1943 | ||
988c0f72 | 1944 | if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) |
f698d856 | 1945 | printk(KERN_DEBUG "%s: deauthenticated\n", sdata->dev->name); |
f0706e82 | 1946 | |
48c2fc59 TW |
1947 | if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE || |
1948 | ifsta->state == IEEE80211_STA_MLME_ASSOCIATE || | |
1949 | ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) { | |
1950 | ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE; | |
f0706e82 JB |
1951 | mod_timer(&ifsta->timer, jiffies + |
1952 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1953 | } | |
1954 | ||
f698d856 | 1955 | ieee80211_set_disassoc(sdata, ifsta, 1); |
d6f2da5b | 1956 | ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED; |
f0706e82 JB |
1957 | } |
1958 | ||
1959 | ||
f698d856 | 1960 | static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1961 | struct ieee80211_if_sta *ifsta, |
1962 | struct ieee80211_mgmt *mgmt, | |
1963 | size_t len) | |
1964 | { | |
1965 | u16 reason_code; | |
0795af57 | 1966 | DECLARE_MAC_BUF(mac); |
f0706e82 | 1967 | |
f4ea83dd | 1968 | if (len < 24 + 2) |
f0706e82 | 1969 | return; |
f0706e82 | 1970 | |
f4ea83dd | 1971 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1972 | return; |
f0706e82 JB |
1973 | |
1974 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
1975 | ||
d6f2da5b | 1976 | if (ifsta->flags & IEEE80211_STA_ASSOCIATED) |
f698d856 | 1977 | printk(KERN_DEBUG "%s: disassociated\n", sdata->dev->name); |
f0706e82 | 1978 | |
48c2fc59 TW |
1979 | if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) { |
1980 | ifsta->state = IEEE80211_STA_MLME_ASSOCIATE; | |
f0706e82 JB |
1981 | mod_timer(&ifsta->timer, jiffies + |
1982 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1983 | } | |
1984 | ||
f698d856 | 1985 | ieee80211_set_disassoc(sdata, ifsta, 0); |
f0706e82 JB |
1986 | } |
1987 | ||
1988 | ||
471b3efd | 1989 | static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1990 | struct ieee80211_if_sta *ifsta, |
1991 | struct ieee80211_mgmt *mgmt, | |
1992 | size_t len, | |
1993 | int reassoc) | |
1994 | { | |
471b3efd | 1995 | struct ieee80211_local *local = sdata->local; |
8318d78a | 1996 | struct ieee80211_supported_band *sband; |
f0706e82 | 1997 | struct sta_info *sta; |
8318d78a | 1998 | u64 rates, basic_rates; |
f0706e82 JB |
1999 | u16 capab_info, status_code, aid; |
2000 | struct ieee802_11_elems elems; | |
471b3efd | 2001 | struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf; |
f0706e82 JB |
2002 | u8 *pos; |
2003 | int i, j; | |
0795af57 | 2004 | DECLARE_MAC_BUF(mac); |
8318d78a | 2005 | bool have_higher_than_11mbit = false; |
f0706e82 JB |
2006 | |
2007 | /* AssocResp and ReassocResp have identical structure, so process both | |
2008 | * of them in this function. */ | |
2009 | ||
48c2fc59 | 2010 | if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE) |
f0706e82 | 2011 | return; |
f0706e82 | 2012 | |
f4ea83dd | 2013 | if (len < 24 + 6) |
f0706e82 | 2014 | return; |
f0706e82 | 2015 | |
f4ea83dd | 2016 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 2017 | return; |
f0706e82 JB |
2018 | |
2019 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
2020 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
2021 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
f0706e82 | 2022 | |
0795af57 | 2023 | printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x " |
f0706e82 | 2024 | "status=%d aid=%d)\n", |
f698d856 | 2025 | sdata->dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa), |
ddd68587 | 2026 | capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); |
f0706e82 JB |
2027 | |
2028 | if (status_code != WLAN_STATUS_SUCCESS) { | |
2029 | printk(KERN_DEBUG "%s: AP denied association (code=%d)\n", | |
f698d856 | 2030 | sdata->dev->name, status_code); |
8a69aa93 DD |
2031 | /* if this was a reassociation, ensure we try a "full" |
2032 | * association next time. This works around some broken APs | |
2033 | * which do not correctly reject reassociation requests. */ | |
d6f2da5b | 2034 | ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
f0706e82 JB |
2035 | return; |
2036 | } | |
2037 | ||
1dd84aa2 JB |
2038 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
2039 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " | |
f698d856 | 2040 | "set\n", sdata->dev->name, aid); |
1dd84aa2 JB |
2041 | aid &= ~(BIT(15) | BIT(14)); |
2042 | ||
f0706e82 | 2043 | pos = mgmt->u.assoc_resp.variable; |
67a4cce4 | 2044 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
f0706e82 JB |
2045 | |
2046 | if (!elems.supp_rates) { | |
2047 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", | |
f698d856 | 2048 | sdata->dev->name); |
f0706e82 JB |
2049 | return; |
2050 | } | |
2051 | ||
f698d856 | 2052 | printk(KERN_DEBUG "%s: associated\n", sdata->dev->name); |
f0706e82 JB |
2053 | ifsta->aid = aid; |
2054 | ifsta->ap_capab = capab_info; | |
2055 | ||
2056 | kfree(ifsta->assocresp_ies); | |
2057 | ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt); | |
0ec0b7ac | 2058 | ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL); |
f0706e82 JB |
2059 | if (ifsta->assocresp_ies) |
2060 | memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len); | |
2061 | ||
d0709a65 JB |
2062 | rcu_read_lock(); |
2063 | ||
f0706e82 JB |
2064 | /* Add STA entry for the AP */ |
2065 | sta = sta_info_get(local, ifsta->bssid); | |
2066 | if (!sta) { | |
2067 | struct ieee80211_sta_bss *bss; | |
73651ee6 | 2068 | int err; |
d0709a65 | 2069 | |
73651ee6 JB |
2070 | sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC); |
2071 | if (!sta) { | |
2072 | printk(KERN_DEBUG "%s: failed to alloc STA entry for" | |
f698d856 | 2073 | " the AP\n", sdata->dev->name); |
d0709a65 | 2074 | rcu_read_unlock(); |
f0706e82 JB |
2075 | return; |
2076 | } | |
f698d856 | 2077 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
8318d78a | 2078 | local->hw.conf.channel->center_freq, |
cffdd30d | 2079 | ifsta->ssid, ifsta->ssid_len); |
f0706e82 | 2080 | if (bss) { |
f0706e82 | 2081 | sta->last_signal = bss->signal; |
566bfe5a | 2082 | sta->last_qual = bss->qual; |
f0706e82 | 2083 | sta->last_noise = bss->noise; |
3e122be0 | 2084 | ieee80211_rx_bss_put(local, bss); |
f0706e82 | 2085 | } |
73651ee6 JB |
2086 | |
2087 | err = sta_info_insert(sta); | |
2088 | if (err) { | |
2089 | printk(KERN_DEBUG "%s: failed to insert STA entry for" | |
f698d856 | 2090 | " the AP (error %d)\n", sdata->dev->name, err); |
73651ee6 JB |
2091 | rcu_read_unlock(); |
2092 | return; | |
2093 | } | |
a61dae1f RR |
2094 | /* update new sta with its last rx activity */ |
2095 | sta->last_rx = jiffies; | |
f0706e82 JB |
2096 | } |
2097 | ||
73651ee6 JB |
2098 | /* |
2099 | * FIXME: Do we really need to update the sta_info's information here? | |
2100 | * We already know about the AP (we found it in our list) so it | |
2101 | * should already be filled with the right info, no? | |
2102 | * As is stands, all this is racy because typically we assume | |
2103 | * the information that is filled in here (except flags) doesn't | |
2104 | * change while a STA structure is alive. As such, it should move | |
2105 | * to between the sta_info_alloc() and sta_info_insert() above. | |
2106 | */ | |
2107 | ||
07346f81 JB |
2108 | set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP | |
2109 | WLAN_STA_AUTHORIZED); | |
f0706e82 JB |
2110 | |
2111 | rates = 0; | |
8318d78a JB |
2112 | basic_rates = 0; |
2113 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
2114 | ||
f0706e82 JB |
2115 | for (i = 0; i < elems.supp_rates_len; i++) { |
2116 | int rate = (elems.supp_rates[i] & 0x7f) * 5; | |
8318d78a JB |
2117 | |
2118 | if (rate > 110) | |
2119 | have_higher_than_11mbit = true; | |
2120 | ||
2121 | for (j = 0; j < sband->n_bitrates; j++) { | |
2122 | if (sband->bitrates[j].bitrate == rate) | |
f0706e82 | 2123 | rates |= BIT(j); |
8318d78a JB |
2124 | if (elems.supp_rates[i] & 0x80) |
2125 | basic_rates |= BIT(j); | |
2126 | } | |
f0706e82 | 2127 | } |
8318d78a | 2128 | |
f0706e82 JB |
2129 | for (i = 0; i < elems.ext_supp_rates_len; i++) { |
2130 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; | |
8318d78a JB |
2131 | |
2132 | if (rate > 110) | |
2133 | have_higher_than_11mbit = true; | |
2134 | ||
2135 | for (j = 0; j < sband->n_bitrates; j++) { | |
2136 | if (sband->bitrates[j].bitrate == rate) | |
f0706e82 | 2137 | rates |= BIT(j); |
8318d78a JB |
2138 | if (elems.ext_supp_rates[i] & 0x80) |
2139 | basic_rates |= BIT(j); | |
2140 | } | |
f0706e82 | 2141 | } |
8318d78a JB |
2142 | |
2143 | sta->supp_rates[local->hw.conf.channel->band] = rates; | |
2144 | sdata->basic_rates = basic_rates; | |
2145 | ||
2146 | /* cf. IEEE 802.11 9.2.12 */ | |
2147 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
2148 | have_higher_than_11mbit) | |
2149 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
2150 | else | |
2151 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
f0706e82 | 2152 | |
3434fbd3 JB |
2153 | if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param && |
2154 | (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) { | |
d3c990fb | 2155 | struct ieee80211_ht_bss_info bss_info; |
d3c990fb RR |
2156 | ieee80211_ht_cap_ie_to_ht_info( |
2157 | (struct ieee80211_ht_cap *) | |
2158 | elems.ht_cap_elem, &sta->ht_info); | |
2159 | ieee80211_ht_addt_info_ie_to_ht_bss_info( | |
2160 | (struct ieee80211_ht_addt_info *) | |
2161 | elems.ht_info_elem, &bss_info); | |
38668c05 | 2162 | ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info); |
d3c990fb RR |
2163 | } |
2164 | ||
f0706e82 JB |
2165 | rate_control_rate_init(sta, local); |
2166 | ||
3434fbd3 | 2167 | if (elems.wmm_param) { |
07346f81 | 2168 | set_sta_flags(sta, WLAN_STA_WME); |
e5f98f2d | 2169 | rcu_read_unlock(); |
f698d856 | 2170 | ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param, |
f0706e82 | 2171 | elems.wmm_param_len); |
e5f98f2d JB |
2172 | } else |
2173 | rcu_read_unlock(); | |
f0706e82 | 2174 | |
21c0cbe7 TW |
2175 | /* set AID and assoc capability, |
2176 | * ieee80211_set_associated() will tell the driver */ | |
8318d78a | 2177 | bss_conf->aid = aid; |
21c0cbe7 | 2178 | bss_conf->assoc_capability = capab_info; |
f698d856 | 2179 | ieee80211_set_associated(sdata, ifsta, 1); |
f0706e82 | 2180 | |
f698d856 | 2181 | ieee80211_associated(sdata, ifsta); |
f0706e82 JB |
2182 | } |
2183 | ||
2184 | ||
2185 | /* Caller must hold local->sta_bss_lock */ | |
f698d856 | 2186 | static void __ieee80211_rx_bss_hash_add(struct ieee80211_local *local, |
f0706e82 JB |
2187 | struct ieee80211_sta_bss *bss) |
2188 | { | |
f709fc69 | 2189 | u8 hash_idx; |
902acc78 JB |
2190 | |
2191 | if (bss_mesh_cfg(bss)) | |
2192 | hash_idx = mesh_id_hash(bss_mesh_id(bss), | |
2193 | bss_mesh_id_len(bss)); | |
f709fc69 | 2194 | else |
f709fc69 | 2195 | hash_idx = STA_HASH(bss->bssid); |
902acc78 | 2196 | |
f709fc69 LCC |
2197 | bss->hnext = local->sta_bss_hash[hash_idx]; |
2198 | local->sta_bss_hash[hash_idx] = bss; | |
f0706e82 JB |
2199 | } |
2200 | ||
2201 | ||
2202 | /* Caller must hold local->sta_bss_lock */ | |
3e122be0 | 2203 | static void __ieee80211_rx_bss_hash_del(struct ieee80211_local *local, |
f0706e82 JB |
2204 | struct ieee80211_sta_bss *bss) |
2205 | { | |
f0706e82 JB |
2206 | struct ieee80211_sta_bss *b, *prev = NULL; |
2207 | b = local->sta_bss_hash[STA_HASH(bss->bssid)]; | |
2208 | while (b) { | |
2209 | if (b == bss) { | |
2210 | if (!prev) | |
2211 | local->sta_bss_hash[STA_HASH(bss->bssid)] = | |
2212 | bss->hnext; | |
2213 | else | |
2214 | prev->hnext = bss->hnext; | |
2215 | break; | |
2216 | } | |
2217 | prev = b; | |
2218 | b = b->hnext; | |
2219 | } | |
2220 | } | |
2221 | ||
2222 | ||
2223 | static struct ieee80211_sta_bss * | |
f698d856 | 2224 | ieee80211_rx_bss_add(struct ieee80211_sub_if_data *sdata, u8 *bssid, int freq, |
cffdd30d | 2225 | u8 *ssid, u8 ssid_len) |
f0706e82 | 2226 | { |
f698d856 | 2227 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
2228 | struct ieee80211_sta_bss *bss; |
2229 | ||
dd00cc48 | 2230 | bss = kzalloc(sizeof(*bss), GFP_ATOMIC); |
f0706e82 JB |
2231 | if (!bss) |
2232 | return NULL; | |
f0706e82 JB |
2233 | atomic_inc(&bss->users); |
2234 | atomic_inc(&bss->users); | |
2235 | memcpy(bss->bssid, bssid, ETH_ALEN); | |
8318d78a | 2236 | bss->freq = freq; |
cffdd30d JL |
2237 | if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) { |
2238 | memcpy(bss->ssid, ssid, ssid_len); | |
2239 | bss->ssid_len = ssid_len; | |
2240 | } | |
f0706e82 JB |
2241 | |
2242 | spin_lock_bh(&local->sta_bss_lock); | |
2243 | /* TODO: order by RSSI? */ | |
2244 | list_add_tail(&bss->list, &local->sta_bss_list); | |
f698d856 | 2245 | __ieee80211_rx_bss_hash_add(local, bss); |
f0706e82 JB |
2246 | spin_unlock_bh(&local->sta_bss_lock); |
2247 | return bss; | |
2248 | } | |
2249 | ||
f0706e82 | 2250 | static struct ieee80211_sta_bss * |
f698d856 | 2251 | ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq, |
cffdd30d | 2252 | u8 *ssid, u8 ssid_len) |
f0706e82 | 2253 | { |
f0706e82 JB |
2254 | struct ieee80211_sta_bss *bss; |
2255 | ||
2256 | spin_lock_bh(&local->sta_bss_lock); | |
2257 | bss = local->sta_bss_hash[STA_HASH(bssid)]; | |
2258 | while (bss) { | |
902acc78 JB |
2259 | if (!bss_mesh_cfg(bss) && |
2260 | !memcmp(bss->bssid, bssid, ETH_ALEN) && | |
8318d78a | 2261 | bss->freq == freq && |
cffdd30d JL |
2262 | bss->ssid_len == ssid_len && |
2263 | (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) { | |
f0706e82 JB |
2264 | atomic_inc(&bss->users); |
2265 | break; | |
2266 | } | |
2267 | bss = bss->hnext; | |
2268 | } | |
2269 | spin_unlock_bh(&local->sta_bss_lock); | |
2270 | return bss; | |
2271 | } | |
2272 | ||
f709fc69 LCC |
2273 | #ifdef CONFIG_MAC80211_MESH |
2274 | static struct ieee80211_sta_bss * | |
f698d856 | 2275 | ieee80211_rx_mesh_bss_get(struct ieee80211_local *local, u8 *mesh_id, int mesh_id_len, |
f709fc69 LCC |
2276 | u8 *mesh_cfg, int freq) |
2277 | { | |
f709fc69 LCC |
2278 | struct ieee80211_sta_bss *bss; |
2279 | ||
2280 | spin_lock_bh(&local->sta_bss_lock); | |
2281 | bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)]; | |
2282 | while (bss) { | |
902acc78 JB |
2283 | if (bss_mesh_cfg(bss) && |
2284 | !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) && | |
f709fc69 LCC |
2285 | bss->freq == freq && |
2286 | mesh_id_len == bss->mesh_id_len && | |
2287 | (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id, | |
2288 | mesh_id_len))) { | |
2289 | atomic_inc(&bss->users); | |
2290 | break; | |
2291 | } | |
2292 | bss = bss->hnext; | |
2293 | } | |
2294 | spin_unlock_bh(&local->sta_bss_lock); | |
2295 | return bss; | |
2296 | } | |
2297 | ||
2298 | static struct ieee80211_sta_bss * | |
f698d856 | 2299 | ieee80211_rx_mesh_bss_add(struct ieee80211_local *local, u8 *mesh_id, int mesh_id_len, |
05e5e883 | 2300 | u8 *mesh_cfg, int mesh_config_len, int freq) |
f709fc69 | 2301 | { |
f709fc69 LCC |
2302 | struct ieee80211_sta_bss *bss; |
2303 | ||
05e5e883 LCC |
2304 | if (mesh_config_len != MESH_CFG_LEN) |
2305 | return NULL; | |
2306 | ||
f709fc69 LCC |
2307 | bss = kzalloc(sizeof(*bss), GFP_ATOMIC); |
2308 | if (!bss) | |
2309 | return NULL; | |
2310 | ||
24736701 | 2311 | bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC); |
f709fc69 LCC |
2312 | if (!bss->mesh_cfg) { |
2313 | kfree(bss); | |
2314 | return NULL; | |
2315 | } | |
2316 | ||
2317 | if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) { | |
2318 | bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC); | |
2319 | if (!bss->mesh_id) { | |
2320 | kfree(bss->mesh_cfg); | |
2321 | kfree(bss); | |
2322 | return NULL; | |
2323 | } | |
2324 | memcpy(bss->mesh_id, mesh_id, mesh_id_len); | |
2325 | } | |
2326 | ||
2327 | atomic_inc(&bss->users); | |
2328 | atomic_inc(&bss->users); | |
24736701 | 2329 | memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN); |
f709fc69 LCC |
2330 | bss->mesh_id_len = mesh_id_len; |
2331 | bss->freq = freq; | |
2332 | spin_lock_bh(&local->sta_bss_lock); | |
2333 | /* TODO: order by RSSI? */ | |
2334 | list_add_tail(&bss->list, &local->sta_bss_list); | |
f698d856 | 2335 | __ieee80211_rx_bss_hash_add(local, bss); |
f709fc69 LCC |
2336 | spin_unlock_bh(&local->sta_bss_lock); |
2337 | return bss; | |
2338 | } | |
2339 | #endif | |
f0706e82 JB |
2340 | |
2341 | static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss) | |
2342 | { | |
2343 | kfree(bss->wpa_ie); | |
2344 | kfree(bss->rsn_ie); | |
2345 | kfree(bss->wmm_ie); | |
c7153508 | 2346 | kfree(bss->ht_ie); |
9306102e | 2347 | kfree(bss->ht_add_ie); |
902acc78 JB |
2348 | kfree(bss_mesh_id(bss)); |
2349 | kfree(bss_mesh_cfg(bss)); | |
f0706e82 JB |
2350 | kfree(bss); |
2351 | } | |
2352 | ||
2353 | ||
3e122be0 | 2354 | static void ieee80211_rx_bss_put(struct ieee80211_local *local, |
f0706e82 JB |
2355 | struct ieee80211_sta_bss *bss) |
2356 | { | |
1ebebea8 PE |
2357 | local_bh_disable(); |
2358 | if (!atomic_dec_and_lock(&bss->users, &local->sta_bss_lock)) { | |
2359 | local_bh_enable(); | |
f0706e82 | 2360 | return; |
1ebebea8 | 2361 | } |
f0706e82 | 2362 | |
3e122be0 | 2363 | __ieee80211_rx_bss_hash_del(local, bss); |
f0706e82 JB |
2364 | list_del(&bss->list); |
2365 | spin_unlock_bh(&local->sta_bss_lock); | |
2366 | ieee80211_rx_bss_free(bss); | |
2367 | } | |
2368 | ||
2369 | ||
3e122be0 | 2370 | void ieee80211_rx_bss_list_init(struct ieee80211_local *local) |
f0706e82 | 2371 | { |
f0706e82 JB |
2372 | spin_lock_init(&local->sta_bss_lock); |
2373 | INIT_LIST_HEAD(&local->sta_bss_list); | |
2374 | } | |
2375 | ||
2376 | ||
3e122be0 | 2377 | void ieee80211_rx_bss_list_deinit(struct ieee80211_local *local) |
f0706e82 | 2378 | { |
f0706e82 JB |
2379 | struct ieee80211_sta_bss *bss, *tmp; |
2380 | ||
2381 | list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list) | |
3e122be0 | 2382 | ieee80211_rx_bss_put(local, bss); |
f0706e82 JB |
2383 | } |
2384 | ||
2385 | ||
f698d856 | 2386 | static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, |
a607268a BR |
2387 | struct ieee80211_if_sta *ifsta, |
2388 | struct ieee80211_sta_bss *bss) | |
2389 | { | |
f698d856 | 2390 | struct ieee80211_local *local = sdata->local; |
a607268a BR |
2391 | int res, rates, i, j; |
2392 | struct sk_buff *skb; | |
2393 | struct ieee80211_mgmt *mgmt; | |
a607268a | 2394 | u8 *pos; |
a607268a | 2395 | struct ieee80211_supported_band *sband; |
507b06d0 | 2396 | union iwreq_data wrqu; |
a607268a BR |
2397 | |
2398 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
2399 | ||
2400 | /* Remove possible STA entries from other IBSS networks. */ | |
dc6676b7 | 2401 | sta_info_flush_delayed(sdata); |
a607268a BR |
2402 | |
2403 | if (local->ops->reset_tsf) { | |
2404 | /* Reset own TSF to allow time synchronization work. */ | |
2405 | local->ops->reset_tsf(local_to_hw(local)); | |
2406 | } | |
2407 | memcpy(ifsta->bssid, bss->bssid, ETH_ALEN); | |
9d139c81 | 2408 | res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID); |
a607268a BR |
2409 | if (res) |
2410 | return res; | |
2411 | ||
2412 | local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10; | |
2413 | ||
a607268a BR |
2414 | sdata->drop_unencrypted = bss->capability & |
2415 | WLAN_CAPABILITY_PRIVACY ? 1 : 0; | |
2416 | ||
f698d856 | 2417 | res = ieee80211_set_freq(sdata, bss->freq); |
a607268a | 2418 | |
be038b37 AK |
2419 | if (res) |
2420 | return res; | |
a607268a | 2421 | |
9d139c81 | 2422 | /* Build IBSS probe response */ |
a607268a | 2423 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400); |
9d139c81 | 2424 | if (skb) { |
a607268a BR |
2425 | skb_reserve(skb, local->hw.extra_tx_headroom); |
2426 | ||
2427 | mgmt = (struct ieee80211_mgmt *) | |
2428 | skb_put(skb, 24 + sizeof(mgmt->u.beacon)); | |
2429 | memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon)); | |
e7827a70 HH |
2430 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
2431 | IEEE80211_STYPE_PROBE_RESP); | |
a607268a | 2432 | memset(mgmt->da, 0xff, ETH_ALEN); |
f698d856 | 2433 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
a607268a BR |
2434 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); |
2435 | mgmt->u.beacon.beacon_int = | |
2436 | cpu_to_le16(local->hw.conf.beacon_int); | |
4faeb860 | 2437 | mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp); |
a607268a BR |
2438 | mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability); |
2439 | ||
2440 | pos = skb_put(skb, 2 + ifsta->ssid_len); | |
2441 | *pos++ = WLAN_EID_SSID; | |
2442 | *pos++ = ifsta->ssid_len; | |
2443 | memcpy(pos, ifsta->ssid, ifsta->ssid_len); | |
2444 | ||
2445 | rates = bss->supp_rates_len; | |
2446 | if (rates > 8) | |
2447 | rates = 8; | |
2448 | pos = skb_put(skb, 2 + rates); | |
2449 | *pos++ = WLAN_EID_SUPP_RATES; | |
2450 | *pos++ = rates; | |
2451 | memcpy(pos, bss->supp_rates, rates); | |
2452 | ||
2453 | if (bss->band == IEEE80211_BAND_2GHZ) { | |
2454 | pos = skb_put(skb, 2 + 1); | |
2455 | *pos++ = WLAN_EID_DS_PARAMS; | |
2456 | *pos++ = 1; | |
2457 | *pos++ = ieee80211_frequency_to_channel(bss->freq); | |
2458 | } | |
2459 | ||
2460 | pos = skb_put(skb, 2 + 2); | |
2461 | *pos++ = WLAN_EID_IBSS_PARAMS; | |
2462 | *pos++ = 2; | |
2463 | /* FIX: set ATIM window based on scan results */ | |
2464 | *pos++ = 0; | |
2465 | *pos++ = 0; | |
2466 | ||
2467 | if (bss->supp_rates_len > 8) { | |
2468 | rates = bss->supp_rates_len - 8; | |
2469 | pos = skb_put(skb, 2 + rates); | |
2470 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
2471 | *pos++ = rates; | |
2472 | memcpy(pos, &bss->supp_rates[8], rates); | |
2473 | } | |
2474 | ||
9d139c81 | 2475 | ifsta->probe_resp = skb; |
e039fa4a | 2476 | |
9d139c81 JB |
2477 | ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON); |
2478 | } | |
a607268a | 2479 | |
9d139c81 JB |
2480 | rates = 0; |
2481 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
2482 | for (i = 0; i < bss->supp_rates_len; i++) { | |
2483 | int bitrate = (bss->supp_rates[i] & 0x7f) * 5; | |
2484 | for (j = 0; j < sband->n_bitrates; j++) | |
2485 | if (sband->bitrates[j].bitrate == bitrate) | |
2486 | rates |= BIT(j); | |
a607268a | 2487 | } |
9d139c81 JB |
2488 | ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates; |
2489 | ||
f698d856 | 2490 | ieee80211_sta_def_wmm_params(sdata, bss, 1); |
a607268a | 2491 | |
48c2fc59 | 2492 | ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED; |
a607268a BR |
2493 | mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); |
2494 | ||
507b06d0 DW |
2495 | memset(&wrqu, 0, sizeof(wrqu)); |
2496 | memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN); | |
f698d856 | 2497 | wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL); |
a607268a BR |
2498 | |
2499 | return res; | |
2500 | } | |
2501 | ||
f709fc69 LCC |
2502 | u64 ieee80211_sta_get_rates(struct ieee80211_local *local, |
2503 | struct ieee802_11_elems *elems, | |
2504 | enum ieee80211_band band) | |
2505 | { | |
2506 | struct ieee80211_supported_band *sband; | |
2507 | struct ieee80211_rate *bitrates; | |
2508 | size_t num_rates; | |
2509 | u64 supp_rates; | |
2510 | int i, j; | |
2511 | sband = local->hw.wiphy->bands[band]; | |
2512 | ||
2513 | if (!sband) { | |
2514 | WARN_ON(1); | |
2515 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
2516 | } | |
2517 | ||
2518 | bitrates = sband->bitrates; | |
2519 | num_rates = sband->n_bitrates; | |
2520 | supp_rates = 0; | |
2521 | for (i = 0; i < elems->supp_rates_len + | |
2522 | elems->ext_supp_rates_len; i++) { | |
2523 | u8 rate = 0; | |
2524 | int own_rate; | |
2525 | if (i < elems->supp_rates_len) | |
2526 | rate = elems->supp_rates[i]; | |
2527 | else if (elems->ext_supp_rates) | |
2528 | rate = elems->ext_supp_rates | |
2529 | [i - elems->supp_rates_len]; | |
2530 | own_rate = 5 * (rate & 0x7f); | |
2531 | for (j = 0; j < num_rates; j++) | |
2532 | if (bitrates[j].bitrate == own_rate) | |
2533 | supp_rates |= BIT(j); | |
2534 | } | |
2535 | return supp_rates; | |
2536 | } | |
2537 | ||
a607268a | 2538 | |
f698d856 | 2539 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2540 | struct ieee80211_mgmt *mgmt, |
2541 | size_t len, | |
2542 | struct ieee80211_rx_status *rx_status, | |
ae6a44e3 | 2543 | struct ieee802_11_elems *elems, |
f0706e82 JB |
2544 | int beacon) |
2545 | { | |
f698d856 | 2546 | struct ieee80211_local *local = sdata->local; |
8318d78a | 2547 | int freq, clen; |
f0706e82 JB |
2548 | struct ieee80211_sta_bss *bss; |
2549 | struct sta_info *sta; | |
9d9bf77d | 2550 | u64 beacon_timestamp, rx_timestamp; |
fab7d4a2 | 2551 | struct ieee80211_channel *channel; |
0795af57 JP |
2552 | DECLARE_MAC_BUF(mac); |
2553 | DECLARE_MAC_BUF(mac2); | |
f0706e82 | 2554 | |
9d9bf77d | 2555 | beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp); |
f0706e82 | 2556 | |
ae6a44e3 | 2557 | if (ieee80211_vif_is_mesh(&sdata->vif) && elems->mesh_id && |
f698d856 | 2558 | elems->mesh_config && mesh_matches_local(elems, sdata)) { |
ae6a44e3 | 2559 | u64 rates = ieee80211_sta_get_rates(local, elems, |
902acc78 JB |
2560 | rx_status->band); |
2561 | ||
f698d856 JBG |
2562 | mesh_neighbour_update(mgmt->sa, rates, sdata, |
2563 | mesh_peer_accepts_plinks(elems)); | |
902acc78 | 2564 | } |
f709fc69 | 2565 | |
d0709a65 JB |
2566 | rcu_read_lock(); |
2567 | ||
ae6a44e3 | 2568 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems->supp_rates && |
f0706e82 JB |
2569 | memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 && |
2570 | (sta = sta_info_get(local, mgmt->sa))) { | |
f709fc69 | 2571 | u64 prev_rates; |
ae6a44e3 | 2572 | u64 supp_rates = ieee80211_sta_get_rates(local, elems, |
f709fc69 | 2573 | rx_status->band); |
f0706e82 | 2574 | |
8318d78a JB |
2575 | prev_rates = sta->supp_rates[rx_status->band]; |
2576 | sta->supp_rates[rx_status->band] &= supp_rates; | |
2577 | if (sta->supp_rates[rx_status->band] == 0) { | |
f0706e82 JB |
2578 | /* No matching rates - this should not really happen. |
2579 | * Make sure that at least one rate is marked | |
2580 | * supported to avoid issues with TX rate ctrl. */ | |
8318d78a JB |
2581 | sta->supp_rates[rx_status->band] = |
2582 | sdata->u.sta.supp_rates_bits[rx_status->band]; | |
f0706e82 | 2583 | } |
f0706e82 JB |
2584 | } |
2585 | ||
d0709a65 JB |
2586 | rcu_read_unlock(); |
2587 | ||
ae6a44e3 EK |
2588 | if (elems->ds_params && elems->ds_params_len == 1) |
2589 | freq = ieee80211_channel_to_frequency(elems->ds_params[0]); | |
f0706e82 | 2590 | else |
8318d78a | 2591 | freq = rx_status->freq; |
f0706e82 | 2592 | |
fab7d4a2 JB |
2593 | channel = ieee80211_get_channel(local->hw.wiphy, freq); |
2594 | ||
2595 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
2596 | return; | |
2597 | ||
f709fc69 | 2598 | #ifdef CONFIG_MAC80211_MESH |
ae6a44e3 | 2599 | if (elems->mesh_config) |
f698d856 | 2600 | bss = ieee80211_rx_mesh_bss_get(local, elems->mesh_id, |
ae6a44e3 | 2601 | elems->mesh_id_len, elems->mesh_config, freq); |
f709fc69 LCC |
2602 | else |
2603 | #endif | |
f698d856 | 2604 | bss = ieee80211_rx_bss_get(local, mgmt->bssid, freq, |
ae6a44e3 | 2605 | elems->ssid, elems->ssid_len); |
f709fc69 LCC |
2606 | if (!bss) { |
2607 | #ifdef CONFIG_MAC80211_MESH | |
ae6a44e3 | 2608 | if (elems->mesh_config) |
f698d856 | 2609 | bss = ieee80211_rx_mesh_bss_add(local, elems->mesh_id, |
ae6a44e3 EK |
2610 | elems->mesh_id_len, elems->mesh_config, |
2611 | elems->mesh_config_len, freq); | |
f709fc69 LCC |
2612 | else |
2613 | #endif | |
f698d856 | 2614 | bss = ieee80211_rx_bss_add(sdata, mgmt->bssid, freq, |
ae6a44e3 | 2615 | elems->ssid, elems->ssid_len); |
f0706e82 JB |
2616 | if (!bss) |
2617 | return; | |
2618 | } else { | |
2619 | #if 0 | |
2620 | /* TODO: order by RSSI? */ | |
2621 | spin_lock_bh(&local->sta_bss_lock); | |
2622 | list_move_tail(&bss->list, &local->sta_bss_list); | |
2623 | spin_unlock_bh(&local->sta_bss_lock); | |
2624 | #endif | |
2625 | } | |
2626 | ||
5628221c | 2627 | /* save the ERP value so that it is available at association time */ |
ae6a44e3 EK |
2628 | if (elems->erp_info && elems->erp_info_len >= 1) { |
2629 | bss->erp_value = elems->erp_info[0]; | |
5628221c DD |
2630 | bss->has_erp_value = 1; |
2631 | } | |
2632 | ||
ae6a44e3 EK |
2633 | if (elems->ht_cap_elem && |
2634 | (!bss->ht_ie || bss->ht_ie_len != elems->ht_cap_elem_len || | |
2635 | memcmp(bss->ht_ie, elems->ht_cap_elem, elems->ht_cap_elem_len))) { | |
30b89b0f | 2636 | kfree(bss->ht_ie); |
ae6a44e3 | 2637 | bss->ht_ie = kmalloc(elems->ht_cap_elem_len + 2, GFP_ATOMIC); |
30b89b0f | 2638 | if (bss->ht_ie) { |
ae6a44e3 EK |
2639 | memcpy(bss->ht_ie, elems->ht_cap_elem - 2, |
2640 | elems->ht_cap_elem_len + 2); | |
2641 | bss->ht_ie_len = elems->ht_cap_elem_len + 2; | |
30b89b0f JB |
2642 | } else |
2643 | bss->ht_ie_len = 0; | |
ae6a44e3 | 2644 | } else if (!elems->ht_cap_elem && bss->ht_ie) { |
30b89b0f JB |
2645 | kfree(bss->ht_ie); |
2646 | bss->ht_ie = NULL; | |
2647 | bss->ht_ie_len = 0; | |
2648 | } | |
2649 | ||
ae6a44e3 | 2650 | if (elems->ht_info_elem && |
9306102e | 2651 | (!bss->ht_add_ie || |
ae6a44e3 EK |
2652 | bss->ht_add_ie_len != elems->ht_info_elem_len || |
2653 | memcmp(bss->ht_add_ie, elems->ht_info_elem, | |
2654 | elems->ht_info_elem_len))) { | |
9306102e EG |
2655 | kfree(bss->ht_add_ie); |
2656 | bss->ht_add_ie = | |
ae6a44e3 | 2657 | kmalloc(elems->ht_info_elem_len + 2, GFP_ATOMIC); |
9306102e | 2658 | if (bss->ht_add_ie) { |
ae6a44e3 EK |
2659 | memcpy(bss->ht_add_ie, elems->ht_info_elem - 2, |
2660 | elems->ht_info_elem_len + 2); | |
2661 | bss->ht_add_ie_len = elems->ht_info_elem_len + 2; | |
9306102e EG |
2662 | } else |
2663 | bss->ht_add_ie_len = 0; | |
ae6a44e3 | 2664 | } else if (!elems->ht_info_elem && bss->ht_add_ie) { |
9306102e EG |
2665 | kfree(bss->ht_add_ie); |
2666 | bss->ht_add_ie = NULL; | |
2667 | bss->ht_add_ie_len = 0; | |
2668 | } | |
2669 | ||
f0706e82 JB |
2670 | bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int); |
2671 | bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info); | |
f0706e82 | 2672 | |
98f7dfd8 EG |
2673 | if (elems->tim) { |
2674 | struct ieee80211_tim_ie *tim_ie = | |
2675 | (struct ieee80211_tim_ie *)elems->tim; | |
2676 | bss->dtim_period = tim_ie->dtim_period; | |
2677 | } | |
2678 | ||
2679 | /* set default value for buggy APs */ | |
2680 | if (!elems->tim || bss->dtim_period == 0) | |
2681 | bss->dtim_period = 1; | |
2682 | ||
f0706e82 | 2683 | bss->supp_rates_len = 0; |
ae6a44e3 | 2684 | if (elems->supp_rates) { |
f0706e82 | 2685 | clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len; |
ae6a44e3 EK |
2686 | if (clen > elems->supp_rates_len) |
2687 | clen = elems->supp_rates_len; | |
2688 | memcpy(&bss->supp_rates[bss->supp_rates_len], elems->supp_rates, | |
f0706e82 JB |
2689 | clen); |
2690 | bss->supp_rates_len += clen; | |
2691 | } | |
ae6a44e3 | 2692 | if (elems->ext_supp_rates) { |
f0706e82 | 2693 | clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len; |
ae6a44e3 EK |
2694 | if (clen > elems->ext_supp_rates_len) |
2695 | clen = elems->ext_supp_rates_len; | |
f0706e82 | 2696 | memcpy(&bss->supp_rates[bss->supp_rates_len], |
ae6a44e3 | 2697 | elems->ext_supp_rates, clen); |
f0706e82 JB |
2698 | bss->supp_rates_len += clen; |
2699 | } | |
2700 | ||
30b89b0f JB |
2701 | bss->band = rx_status->band; |
2702 | ||
2703 | bss->timestamp = beacon_timestamp; | |
2704 | bss->last_update = jiffies; | |
30b89b0f JB |
2705 | bss->signal = rx_status->signal; |
2706 | bss->noise = rx_status->noise; | |
566bfe5a | 2707 | bss->qual = rx_status->qual; |
30b89b0f JB |
2708 | if (!beacon && !bss->probe_resp) |
2709 | bss->probe_resp = true; | |
2710 | ||
2711 | /* | |
2712 | * In STA mode, the remaining parameters should not be overridden | |
2713 | * by beacons because they're not necessarily accurate there. | |
2714 | */ | |
2715 | if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS && | |
2716 | bss->probe_resp && beacon) { | |
3e122be0 | 2717 | ieee80211_rx_bss_put(local, bss); |
30b89b0f JB |
2718 | return; |
2719 | } | |
2720 | ||
ae6a44e3 EK |
2721 | if (elems->wpa && |
2722 | (!bss->wpa_ie || bss->wpa_ie_len != elems->wpa_len || | |
2723 | memcmp(bss->wpa_ie, elems->wpa, elems->wpa_len))) { | |
f0706e82 | 2724 | kfree(bss->wpa_ie); |
ae6a44e3 | 2725 | bss->wpa_ie = kmalloc(elems->wpa_len + 2, GFP_ATOMIC); |
f0706e82 | 2726 | if (bss->wpa_ie) { |
ae6a44e3 EK |
2727 | memcpy(bss->wpa_ie, elems->wpa - 2, elems->wpa_len + 2); |
2728 | bss->wpa_ie_len = elems->wpa_len + 2; | |
f0706e82 JB |
2729 | } else |
2730 | bss->wpa_ie_len = 0; | |
ae6a44e3 | 2731 | } else if (!elems->wpa && bss->wpa_ie) { |
f0706e82 JB |
2732 | kfree(bss->wpa_ie); |
2733 | bss->wpa_ie = NULL; | |
2734 | bss->wpa_ie_len = 0; | |
2735 | } | |
2736 | ||
ae6a44e3 EK |
2737 | if (elems->rsn && |
2738 | (!bss->rsn_ie || bss->rsn_ie_len != elems->rsn_len || | |
2739 | memcmp(bss->rsn_ie, elems->rsn, elems->rsn_len))) { | |
f0706e82 | 2740 | kfree(bss->rsn_ie); |
ae6a44e3 | 2741 | bss->rsn_ie = kmalloc(elems->rsn_len + 2, GFP_ATOMIC); |
f0706e82 | 2742 | if (bss->rsn_ie) { |
ae6a44e3 EK |
2743 | memcpy(bss->rsn_ie, elems->rsn - 2, elems->rsn_len + 2); |
2744 | bss->rsn_ie_len = elems->rsn_len + 2; | |
f0706e82 JB |
2745 | } else |
2746 | bss->rsn_ie_len = 0; | |
ae6a44e3 | 2747 | } else if (!elems->rsn && bss->rsn_ie) { |
f0706e82 JB |
2748 | kfree(bss->rsn_ie); |
2749 | bss->rsn_ie = NULL; | |
2750 | bss->rsn_ie_len = 0; | |
2751 | } | |
2752 | ||
30b89b0f JB |
2753 | /* |
2754 | * Cf. | |
2755 | * http://www.wipo.int/pctdb/en/wo.jsp?wo=2007047181&IA=WO2007047181&DISPLAY=DESC | |
2756 | * | |
2757 | * quoting: | |
2758 | * | |
2759 | * In particular, "Wi-Fi CERTIFIED for WMM - Support for Multimedia | |
2760 | * Applications with Quality of Service in Wi-Fi Networks," Wi- Fi | |
2761 | * Alliance (September 1, 2004) is incorporated by reference herein. | |
2762 | * The inclusion of the WMM Parameters in probe responses and | |
2763 | * association responses is mandatory for WMM enabled networks. The | |
2764 | * inclusion of the WMM Parameters in beacons, however, is optional. | |
2765 | */ | |
2766 | ||
ae6a44e3 EK |
2767 | if (elems->wmm_param && |
2768 | (!bss->wmm_ie || bss->wmm_ie_len != elems->wmm_param_len || | |
2769 | memcmp(bss->wmm_ie, elems->wmm_param, elems->wmm_param_len))) { | |
f0706e82 | 2770 | kfree(bss->wmm_ie); |
ae6a44e3 | 2771 | bss->wmm_ie = kmalloc(elems->wmm_param_len + 2, GFP_ATOMIC); |
f0706e82 | 2772 | if (bss->wmm_ie) { |
ae6a44e3 EK |
2773 | memcpy(bss->wmm_ie, elems->wmm_param - 2, |
2774 | elems->wmm_param_len + 2); | |
2775 | bss->wmm_ie_len = elems->wmm_param_len + 2; | |
f0706e82 JB |
2776 | } else |
2777 | bss->wmm_ie_len = 0; | |
ae6a44e3 EK |
2778 | } else if (elems->wmm_info && |
2779 | (!bss->wmm_ie || bss->wmm_ie_len != elems->wmm_info_len || | |
2780 | memcmp(bss->wmm_ie, elems->wmm_info, | |
2781 | elems->wmm_info_len))) { | |
a46f025d AK |
2782 | /* As for certain AP's Fifth bit is not set in WMM IE in |
2783 | * beacon frames.So while parsing the beacon frame the | |
2784 | * wmm_info structure is used instead of wmm_param. | |
2785 | * wmm_info structure was never used to set bss->wmm_ie. | |
2786 | * This code fixes this problem by copying the WME | |
2787 | * information from wmm_info to bss->wmm_ie and enabling | |
2788 | * n-band association. | |
2789 | */ | |
2790 | kfree(bss->wmm_ie); | |
ae6a44e3 | 2791 | bss->wmm_ie = kmalloc(elems->wmm_info_len + 2, GFP_ATOMIC); |
a46f025d | 2792 | if (bss->wmm_ie) { |
ae6a44e3 EK |
2793 | memcpy(bss->wmm_ie, elems->wmm_info - 2, |
2794 | elems->wmm_info_len + 2); | |
2795 | bss->wmm_ie_len = elems->wmm_info_len + 2; | |
a46f025d AK |
2796 | } else |
2797 | bss->wmm_ie_len = 0; | |
ae6a44e3 | 2798 | } else if (!elems->wmm_param && !elems->wmm_info && bss->wmm_ie) { |
f0706e82 JB |
2799 | kfree(bss->wmm_ie); |
2800 | bss->wmm_ie = NULL; | |
2801 | bss->wmm_ie_len = 0; | |
2802 | } | |
9d9bf77d BR |
2803 | |
2804 | /* check if we need to merge IBSS */ | |
2805 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon && | |
2806 | !local->sta_sw_scanning && !local->sta_hw_scanning && | |
fba4a1e6 | 2807 | bss->capability & WLAN_CAPABILITY_IBSS && |
9d9bf77d | 2808 | bss->freq == local->oper_channel->center_freq && |
ae6a44e3 EK |
2809 | elems->ssid_len == sdata->u.sta.ssid_len && |
2810 | memcmp(elems->ssid, sdata->u.sta.ssid, | |
2811 | sdata->u.sta.ssid_len) == 0) { | |
9d9bf77d BR |
2812 | if (rx_status->flag & RX_FLAG_TSFT) { |
2813 | /* in order for correct IBSS merging we need mactime | |
2814 | * | |
2815 | * since mactime is defined as the time the first data | |
2816 | * symbol of the frame hits the PHY, and the timestamp | |
2817 | * of the beacon is defined as "the time that the data | |
2818 | * symbol containing the first bit of the timestamp is | |
2819 | * transmitted to the PHY plus the transmitting STA’s | |
2820 | * delays through its local PHY from the MAC-PHY | |
2821 | * interface to its interface with the WM" | |
2822 | * (802.11 11.1.2) - equals the time this bit arrives at | |
2823 | * the receiver - we have to take into account the | |
2824 | * offset between the two. | |
2825 | * e.g: at 1 MBit that means mactime is 192 usec earlier | |
2826 | * (=24 bytes * 8 usecs/byte) than the beacon timestamp. | |
2827 | */ | |
2828 | int rate = local->hw.wiphy->bands[rx_status->band]-> | |
2829 | bitrates[rx_status->rate_idx].bitrate; | |
2830 | rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate); | |
2831 | } else if (local && local->ops && local->ops->get_tsf) | |
2832 | /* second best option: get current TSF */ | |
2833 | rx_timestamp = local->ops->get_tsf(local_to_hw(local)); | |
2834 | else | |
2835 | /* can't merge without knowing the TSF */ | |
2836 | rx_timestamp = -1LLU; | |
2837 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
2838 | printk(KERN_DEBUG "RX beacon SA=%s BSSID=" | |
2839 | "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n", | |
2840 | print_mac(mac, mgmt->sa), | |
2841 | print_mac(mac2, mgmt->bssid), | |
2842 | (unsigned long long)rx_timestamp, | |
2843 | (unsigned long long)beacon_timestamp, | |
2844 | (unsigned long long)(rx_timestamp - beacon_timestamp), | |
2845 | jiffies); | |
2846 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
2847 | if (beacon_timestamp > rx_timestamp) { | |
fba4a1e6 | 2848 | #ifndef CONFIG_MAC80211_IBSS_DEBUG |
f4ea83dd JB |
2849 | printk(KERN_DEBUG "%s: beacon TSF higher than " |
2850 | "local TSF - IBSS merge with BSSID %s\n", | |
f698d856 | 2851 | sdata->dev->name, print_mac(mac, mgmt->bssid)); |
fba4a1e6 | 2852 | #endif |
f698d856 JBG |
2853 | ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss); |
2854 | ieee80211_ibss_add_sta(sdata, NULL, | |
87291c02 VK |
2855 | mgmt->bssid, mgmt->sa, |
2856 | BIT(rx_status->rate_idx)); | |
9d9bf77d BR |
2857 | } |
2858 | } | |
2859 | ||
3e122be0 | 2860 | ieee80211_rx_bss_put(local, bss); |
f0706e82 JB |
2861 | } |
2862 | ||
2863 | ||
f698d856 | 2864 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2865 | struct ieee80211_mgmt *mgmt, |
2866 | size_t len, | |
2867 | struct ieee80211_rx_status *rx_status) | |
2868 | { | |
ae6a44e3 EK |
2869 | size_t baselen; |
2870 | struct ieee802_11_elems elems; | |
2871 | ||
8e7cdbb6 TW |
2872 | if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN)) |
2873 | return; /* ignore ProbeResp to foreign address */ | |
2874 | ||
ae6a44e3 EK |
2875 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
2876 | if (baselen > len) | |
2877 | return; | |
2878 | ||
2879 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
2880 | &elems); | |
2881 | ||
f698d856 | 2882 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, 0); |
f0706e82 JB |
2883 | } |
2884 | ||
2885 | ||
f698d856 | 2886 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2887 | struct ieee80211_mgmt *mgmt, |
2888 | size_t len, | |
2889 | struct ieee80211_rx_status *rx_status) | |
2890 | { | |
f0706e82 | 2891 | struct ieee80211_if_sta *ifsta; |
f0706e82 JB |
2892 | size_t baselen; |
2893 | struct ieee802_11_elems elems; | |
f698d856 | 2894 | struct ieee80211_local *local = sdata->local; |
d3c990fb | 2895 | struct ieee80211_conf *conf = &local->hw.conf; |
471b3efd | 2896 | u32 changed = 0; |
f0706e82 | 2897 | |
ae6a44e3 EK |
2898 | /* Process beacon from the current BSS */ |
2899 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
2900 | if (baselen > len) | |
2901 | return; | |
2902 | ||
2903 | ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems); | |
2904 | ||
f698d856 | 2905 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, 1); |
f0706e82 | 2906 | |
51fb61e7 | 2907 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
f0706e82 JB |
2908 | return; |
2909 | ifsta = &sdata->u.sta; | |
2910 | ||
d6f2da5b | 2911 | if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) || |
f0706e82 JB |
2912 | memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) |
2913 | return; | |
2914 | ||
f698d856 | 2915 | ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param, |
3434fbd3 | 2916 | elems.wmm_param_len); |
d18ef29f RC |
2917 | |
2918 | /* Do not send changes to driver if we are scanning. This removes | |
2919 | * requirement that driver's bss_info_changed function needs to be | |
2920 | * atomic. */ | |
2921 | if (local->sta_sw_scanning || local->sta_hw_scanning) | |
2922 | return; | |
2923 | ||
5628221c | 2924 | if (elems.erp_info && elems.erp_info_len >= 1) |
471b3efd | 2925 | changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]); |
50c4afb9 JL |
2926 | else { |
2927 | u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info); | |
2928 | changed |= ieee80211_handle_protect_preamb(sdata, false, | |
2929 | (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0); | |
2930 | } | |
f0706e82 | 2931 | |
d3c990fb | 2932 | if (elems.ht_cap_elem && elems.ht_info_elem && |
38668c05 | 2933 | elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) { |
d3c990fb RR |
2934 | struct ieee80211_ht_bss_info bss_info; |
2935 | ||
2936 | ieee80211_ht_addt_info_ie_to_ht_bss_info( | |
2937 | (struct ieee80211_ht_addt_info *) | |
2938 | elems.ht_info_elem, &bss_info); | |
38668c05 TW |
2939 | changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf, |
2940 | &bss_info); | |
d3c990fb RR |
2941 | } |
2942 | ||
471b3efd | 2943 | ieee80211_bss_info_change_notify(sdata, changed); |
f0706e82 JB |
2944 | } |
2945 | ||
2946 | ||
f698d856 | 2947 | static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2948 | struct ieee80211_if_sta *ifsta, |
2949 | struct ieee80211_mgmt *mgmt, | |
2950 | size_t len, | |
2951 | struct ieee80211_rx_status *rx_status) | |
2952 | { | |
f698d856 | 2953 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
2954 | int tx_last_beacon; |
2955 | struct sk_buff *skb; | |
2956 | struct ieee80211_mgmt *resp; | |
2957 | u8 *pos, *end; | |
0795af57 JP |
2958 | DECLARE_MAC_BUF(mac); |
2959 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
2960 | DECLARE_MAC_BUF(mac2); | |
2961 | DECLARE_MAC_BUF(mac3); | |
2962 | #endif | |
f0706e82 | 2963 | |
51fb61e7 | 2964 | if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS || |
48c2fc59 | 2965 | ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED || |
f0706e82 JB |
2966 | len < 24 + 2 || !ifsta->probe_resp) |
2967 | return; | |
2968 | ||
2969 | if (local->ops->tx_last_beacon) | |
2970 | tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local)); | |
2971 | else | |
2972 | tx_last_beacon = 1; | |
2973 | ||
2974 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0795af57 JP |
2975 | printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID=" |
2976 | "%s (tx_last_beacon=%d)\n", | |
f698d856 | 2977 | sdata->dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da), |
0795af57 | 2978 | print_mac(mac3, mgmt->bssid), tx_last_beacon); |
f0706e82 JB |
2979 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
2980 | ||
2981 | if (!tx_last_beacon) | |
2982 | return; | |
2983 | ||
2984 | if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 && | |
2985 | memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0) | |
2986 | return; | |
2987 | ||
2988 | end = ((u8 *) mgmt) + len; | |
2989 | pos = mgmt->u.probe_req.variable; | |
2990 | if (pos[0] != WLAN_EID_SSID || | |
2991 | pos + 2 + pos[1] > end) { | |
f4ea83dd JB |
2992 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
2993 | printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq " | |
2994 | "from %s\n", | |
f698d856 | 2995 | sdata->dev->name, print_mac(mac, mgmt->sa)); |
f4ea83dd | 2996 | #endif |
f0706e82 JB |
2997 | return; |
2998 | } | |
2999 | if (pos[1] != 0 && | |
3000 | (pos[1] != ifsta->ssid_len || | |
3001 | memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) { | |
3002 | /* Ignore ProbeReq for foreign SSID */ | |
3003 | return; | |
3004 | } | |
3005 | ||
3006 | /* Reply with ProbeResp */ | |
0ec0b7ac | 3007 | skb = skb_copy(ifsta->probe_resp, GFP_KERNEL); |
f0706e82 JB |
3008 | if (!skb) |
3009 | return; | |
3010 | ||
3011 | resp = (struct ieee80211_mgmt *) skb->data; | |
3012 | memcpy(resp->da, mgmt->sa, ETH_ALEN); | |
3013 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0795af57 | 3014 | printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n", |
f698d856 | 3015 | sdata->dev->name, print_mac(mac, resp->da)); |
f0706e82 | 3016 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
f698d856 | 3017 | ieee80211_sta_tx(sdata, skb, 0); |
f0706e82 JB |
3018 | } |
3019 | ||
f698d856 | 3020 | static void ieee80211_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, |
4e20cb29 JB |
3021 | struct ieee80211_if_sta *ifsta, |
3022 | struct ieee80211_mgmt *mgmt, | |
f709fc69 LCC |
3023 | size_t len, |
3024 | struct ieee80211_rx_status *rx_status) | |
9f985b0e | 3025 | { |
f698d856 | 3026 | struct ieee80211_local *local = sdata->local; |
f709fc69 | 3027 | |
9f985b0e RR |
3028 | if (len < IEEE80211_MIN_ACTION_SIZE) |
3029 | return; | |
3030 | ||
3031 | switch (mgmt->u.action.category) { | |
b6623486 AK |
3032 | case WLAN_CATEGORY_SPECTRUM_MGMT: |
3033 | if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ) | |
3034 | break; | |
3035 | switch (mgmt->u.action.u.chan_switch.action_code) { | |
3036 | case WLAN_ACTION_SPCT_MSR_REQ: | |
3037 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
3038 | sizeof(mgmt->u.action.u.measurement))) | |
3039 | break; | |
f698d856 | 3040 | ieee80211_sta_process_measurement_req(sdata, mgmt, len); |
b6623486 AK |
3041 | break; |
3042 | } | |
3043 | break; | |
9f985b0e RR |
3044 | case WLAN_CATEGORY_BACK: |
3045 | switch (mgmt->u.action.u.addba_req.action_code) { | |
3046 | case WLAN_ACTION_ADDBA_REQ: | |
3047 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
3048 | sizeof(mgmt->u.action.u.addba_req))) | |
3049 | break; | |
f698d856 | 3050 | ieee80211_sta_process_addba_request(local, mgmt, len); |
9f985b0e | 3051 | break; |
eadc8d9e RR |
3052 | case WLAN_ACTION_ADDBA_RESP: |
3053 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
3054 | sizeof(mgmt->u.action.u.addba_resp))) | |
3055 | break; | |
f698d856 | 3056 | ieee80211_sta_process_addba_resp(local, mgmt, len); |
eadc8d9e | 3057 | break; |
688b88a4 RR |
3058 | case WLAN_ACTION_DELBA: |
3059 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
3060 | sizeof(mgmt->u.action.u.delba))) | |
3061 | break; | |
f698d856 | 3062 | ieee80211_sta_process_delba(sdata, mgmt, len); |
688b88a4 | 3063 | break; |
9f985b0e RR |
3064 | } |
3065 | break; | |
f709fc69 | 3066 | case PLINK_CATEGORY: |
902acc78 | 3067 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
f698d856 | 3068 | mesh_rx_plink_frame(sdata, mgmt, len, rx_status); |
f709fc69 | 3069 | break; |
f709fc69 | 3070 | case MESH_PATH_SEL_CATEGORY: |
902acc78 | 3071 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
f698d856 | 3072 | mesh_rx_path_sel_frame(sdata, mgmt, len); |
f709fc69 | 3073 | break; |
9f985b0e RR |
3074 | } |
3075 | } | |
f0706e82 | 3076 | |
f698d856 | 3077 | void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, |
f0706e82 JB |
3078 | struct ieee80211_rx_status *rx_status) |
3079 | { | |
f698d856 | 3080 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
3081 | struct ieee80211_if_sta *ifsta; |
3082 | struct ieee80211_mgmt *mgmt; | |
3083 | u16 fc; | |
3084 | ||
3085 | if (skb->len < 24) | |
3086 | goto fail; | |
3087 | ||
f0706e82 JB |
3088 | ifsta = &sdata->u.sta; |
3089 | ||
3090 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
3091 | fc = le16_to_cpu(mgmt->frame_control); | |
3092 | ||
3093 | switch (fc & IEEE80211_FCTL_STYPE) { | |
3094 | case IEEE80211_STYPE_PROBE_REQ: | |
3095 | case IEEE80211_STYPE_PROBE_RESP: | |
3096 | case IEEE80211_STYPE_BEACON: | |
f709fc69 | 3097 | case IEEE80211_STYPE_ACTION: |
f0706e82 JB |
3098 | memcpy(skb->cb, rx_status, sizeof(*rx_status)); |
3099 | case IEEE80211_STYPE_AUTH: | |
3100 | case IEEE80211_STYPE_ASSOC_RESP: | |
3101 | case IEEE80211_STYPE_REASSOC_RESP: | |
3102 | case IEEE80211_STYPE_DEAUTH: | |
3103 | case IEEE80211_STYPE_DISASSOC: | |
3104 | skb_queue_tail(&ifsta->skb_queue, skb); | |
3105 | queue_work(local->hw.workqueue, &ifsta->work); | |
3106 | return; | |
f0706e82 JB |
3107 | } |
3108 | ||
3109 | fail: | |
3110 | kfree_skb(skb); | |
3111 | } | |
3112 | ||
3113 | ||
f698d856 | 3114 | static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
3115 | struct sk_buff *skb) |
3116 | { | |
3117 | struct ieee80211_rx_status *rx_status; | |
f0706e82 JB |
3118 | struct ieee80211_if_sta *ifsta; |
3119 | struct ieee80211_mgmt *mgmt; | |
3120 | u16 fc; | |
3121 | ||
f0706e82 JB |
3122 | ifsta = &sdata->u.sta; |
3123 | ||
3124 | rx_status = (struct ieee80211_rx_status *) skb->cb; | |
3125 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
3126 | fc = le16_to_cpu(mgmt->frame_control); | |
3127 | ||
3128 | switch (fc & IEEE80211_FCTL_STYPE) { | |
3129 | case IEEE80211_STYPE_PROBE_REQ: | |
f698d856 | 3130 | ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len, |
f0706e82 JB |
3131 | rx_status); |
3132 | break; | |
3133 | case IEEE80211_STYPE_PROBE_RESP: | |
f698d856 | 3134 | ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status); |
f0706e82 JB |
3135 | break; |
3136 | case IEEE80211_STYPE_BEACON: | |
f698d856 | 3137 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); |
f0706e82 JB |
3138 | break; |
3139 | case IEEE80211_STYPE_AUTH: | |
f698d856 | 3140 | ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len); |
f0706e82 JB |
3141 | break; |
3142 | case IEEE80211_STYPE_ASSOC_RESP: | |
471b3efd | 3143 | ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0); |
f0706e82 JB |
3144 | break; |
3145 | case IEEE80211_STYPE_REASSOC_RESP: | |
471b3efd | 3146 | ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1); |
f0706e82 JB |
3147 | break; |
3148 | case IEEE80211_STYPE_DEAUTH: | |
f698d856 | 3149 | ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len); |
f0706e82 JB |
3150 | break; |
3151 | case IEEE80211_STYPE_DISASSOC: | |
f698d856 | 3152 | ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len); |
f0706e82 | 3153 | break; |
9f985b0e | 3154 | case IEEE80211_STYPE_ACTION: |
f698d856 | 3155 | ieee80211_rx_mgmt_action(sdata, ifsta, mgmt, skb->len, rx_status); |
9f985b0e | 3156 | break; |
f0706e82 JB |
3157 | } |
3158 | ||
3159 | kfree_skb(skb); | |
3160 | } | |
3161 | ||
3162 | ||
9ae54c84 | 3163 | ieee80211_rx_result |
f698d856 | 3164 | ieee80211_sta_rx_scan(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, |
ece8eddd | 3165 | struct ieee80211_rx_status *rx_status) |
f0706e82 JB |
3166 | { |
3167 | struct ieee80211_mgmt *mgmt; | |
4e3996fe | 3168 | __le16 fc; |
f0706e82 | 3169 | |
ece8eddd | 3170 | if (skb->len < 2) |
e4c26add | 3171 | return RX_DROP_UNUSABLE; |
f0706e82 JB |
3172 | |
3173 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
4e3996fe | 3174 | fc = mgmt->frame_control; |
f0706e82 | 3175 | |
4e3996fe | 3176 | if (ieee80211_is_ctl(fc)) |
9ae54c84 | 3177 | return RX_CONTINUE; |
ece8eddd ZY |
3178 | |
3179 | if (skb->len < 24) | |
e4c26add | 3180 | return RX_DROP_MONITOR; |
ece8eddd | 3181 | |
4e3996fe | 3182 | if (ieee80211_is_probe_resp(fc)) { |
f698d856 | 3183 | ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status); |
4e3996fe HH |
3184 | dev_kfree_skb(skb); |
3185 | return RX_QUEUED; | |
f0706e82 | 3186 | } |
4e3996fe HH |
3187 | |
3188 | if (ieee80211_is_beacon(fc)) { | |
f698d856 | 3189 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); |
4e3996fe HH |
3190 | dev_kfree_skb(skb); |
3191 | return RX_QUEUED; | |
3192 | } | |
3193 | ||
9ae54c84 | 3194 | return RX_CONTINUE; |
f0706e82 JB |
3195 | } |
3196 | ||
3197 | ||
f698d856 | 3198 | static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 3199 | { |
f698d856 | 3200 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
3201 | int active = 0; |
3202 | struct sta_info *sta; | |
3203 | ||
d0709a65 JB |
3204 | rcu_read_lock(); |
3205 | ||
3206 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
3207 | if (sta->sdata == sdata && | |
f0706e82 JB |
3208 | time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL, |
3209 | jiffies)) { | |
3210 | active++; | |
3211 | break; | |
3212 | } | |
3213 | } | |
d0709a65 JB |
3214 | |
3215 | rcu_read_unlock(); | |
f0706e82 JB |
3216 | |
3217 | return active; | |
3218 | } | |
3219 | ||
3220 | ||
f698d856 | 3221 | static void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, unsigned long exp_time) |
f0706e82 | 3222 | { |
f698d856 | 3223 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 3224 | struct sta_info *sta, *tmp; |
be8755e1 | 3225 | LIST_HEAD(tmp_list); |
0795af57 | 3226 | DECLARE_MAC_BUF(mac); |
d0709a65 | 3227 | unsigned long flags; |
f0706e82 | 3228 | |
d0709a65 | 3229 | spin_lock_irqsave(&local->sta_lock, flags); |
f0706e82 | 3230 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) |
f709fc69 | 3231 | if (time_after(jiffies, sta->last_rx + exp_time)) { |
f4ea83dd | 3232 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
0795af57 | 3233 | printk(KERN_DEBUG "%s: expiring inactive STA %s\n", |
f698d856 | 3234 | sdata->dev->name, print_mac(mac, sta->addr)); |
f4ea83dd | 3235 | #endif |
cb585bcc | 3236 | __sta_info_unlink(&sta); |
d0709a65 JB |
3237 | if (sta) |
3238 | list_add(&sta->list, &tmp_list); | |
f0706e82 | 3239 | } |
d0709a65 | 3240 | spin_unlock_irqrestore(&local->sta_lock, flags); |
be8755e1 | 3241 | |
d0709a65 JB |
3242 | list_for_each_entry_safe(sta, tmp, &tmp_list, list) |
3243 | sta_info_destroy(sta); | |
f0706e82 JB |
3244 | } |
3245 | ||
3246 | ||
f698d856 | 3247 | static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
3248 | struct ieee80211_if_sta *ifsta) |
3249 | { | |
3250 | mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); | |
3251 | ||
f698d856 JBG |
3252 | ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT); |
3253 | if (ieee80211_sta_active_ibss(sdata)) | |
f0706e82 JB |
3254 | return; |
3255 | ||
3256 | printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other " | |
f698d856 JBG |
3257 | "IBSS networks with same SSID (merge)\n", sdata->dev->name); |
3258 | ieee80211_sta_req_scan(sdata, ifsta->ssid, ifsta->ssid_len); | |
f0706e82 JB |
3259 | } |
3260 | ||
3261 | ||
f709fc69 | 3262 | #ifdef CONFIG_MAC80211_MESH |
f698d856 | 3263 | static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata, |
f709fc69 LCC |
3264 | struct ieee80211_if_sta *ifsta) |
3265 | { | |
f709fc69 LCC |
3266 | bool free_plinks; |
3267 | ||
f698d856 JBG |
3268 | ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT); |
3269 | mesh_path_expire(sdata); | |
f709fc69 LCC |
3270 | |
3271 | free_plinks = mesh_plink_availables(sdata); | |
3272 | if (free_plinks != sdata->u.sta.accepting_plinks) | |
9d139c81 | 3273 | ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON); |
f709fc69 LCC |
3274 | |
3275 | mod_timer(&ifsta->timer, jiffies + | |
3276 | IEEE80211_MESH_HOUSEKEEPING_INTERVAL); | |
3277 | } | |
3278 | ||
3279 | ||
f698d856 | 3280 | void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) |
f709fc69 LCC |
3281 | { |
3282 | struct ieee80211_if_sta *ifsta; | |
f709fc69 | 3283 | ifsta = &sdata->u.sta; |
48c2fc59 | 3284 | ifsta->state = IEEE80211_STA_MLME_MESH_UP; |
f709fc69 | 3285 | ieee80211_sta_timer((unsigned long)sdata); |
56a6d13d | 3286 | ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON); |
f709fc69 LCC |
3287 | } |
3288 | #endif | |
3289 | ||
3290 | ||
f0706e82 JB |
3291 | void ieee80211_sta_timer(unsigned long data) |
3292 | { | |
3293 | struct ieee80211_sub_if_data *sdata = | |
3294 | (struct ieee80211_sub_if_data *) data; | |
3295 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
f698d856 | 3296 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
3297 | |
3298 | set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); | |
3299 | queue_work(local->hw.workqueue, &ifsta->work); | |
3300 | } | |
3301 | ||
f0706e82 JB |
3302 | void ieee80211_sta_work(struct work_struct *work) |
3303 | { | |
3304 | struct ieee80211_sub_if_data *sdata = | |
3305 | container_of(work, struct ieee80211_sub_if_data, u.sta.work); | |
f698d856 | 3306 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
3307 | struct ieee80211_if_sta *ifsta; |
3308 | struct sk_buff *skb; | |
3309 | ||
f698d856 | 3310 | if (!netif_running(sdata->dev)) |
f0706e82 JB |
3311 | return; |
3312 | ||
ece8eddd | 3313 | if (local->sta_sw_scanning || local->sta_hw_scanning) |
f0706e82 JB |
3314 | return; |
3315 | ||
f4ea83dd JB |
3316 | if (WARN_ON(sdata->vif.type != IEEE80211_IF_TYPE_STA && |
3317 | sdata->vif.type != IEEE80211_IF_TYPE_IBSS && | |
3318 | sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT)) | |
f0706e82 | 3319 | return; |
f0706e82 JB |
3320 | ifsta = &sdata->u.sta; |
3321 | ||
3322 | while ((skb = skb_dequeue(&ifsta->skb_queue))) | |
f698d856 | 3323 | ieee80211_sta_rx_queued_mgmt(sdata, skb); |
f0706e82 | 3324 | |
f709fc69 | 3325 | #ifdef CONFIG_MAC80211_MESH |
902acc78 JB |
3326 | if (ifsta->preq_queue_len && |
3327 | time_after(jiffies, | |
3328 | ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval))) | |
f698d856 | 3329 | mesh_path_start_discovery(sdata); |
f709fc69 LCC |
3330 | #endif |
3331 | ||
48c2fc59 TW |
3332 | if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE && |
3333 | ifsta->state != IEEE80211_STA_MLME_ASSOCIATE && | |
f0706e82 | 3334 | test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) { |
a0af5f14 | 3335 | if (ifsta->scan_ssid_len) |
f698d856 | 3336 | ieee80211_sta_start_scan(sdata, ifsta->scan_ssid, ifsta->scan_ssid_len); |
a0af5f14 | 3337 | else |
f698d856 | 3338 | ieee80211_sta_start_scan(sdata, NULL, 0); |
f0706e82 JB |
3339 | return; |
3340 | } | |
3341 | ||
3342 | if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) { | |
f698d856 | 3343 | if (ieee80211_sta_config_auth(sdata, ifsta)) |
f0706e82 JB |
3344 | return; |
3345 | clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); | |
3346 | } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request)) | |
3347 | return; | |
3348 | ||
3349 | switch (ifsta->state) { | |
48c2fc59 | 3350 | case IEEE80211_STA_MLME_DISABLED: |
f0706e82 | 3351 | break; |
48c2fc59 | 3352 | case IEEE80211_STA_MLME_AUTHENTICATE: |
f698d856 | 3353 | ieee80211_authenticate(sdata, ifsta); |
f0706e82 | 3354 | break; |
48c2fc59 | 3355 | case IEEE80211_STA_MLME_ASSOCIATE: |
f698d856 | 3356 | ieee80211_associate(sdata, ifsta); |
f0706e82 | 3357 | break; |
48c2fc59 | 3358 | case IEEE80211_STA_MLME_ASSOCIATED: |
f698d856 | 3359 | ieee80211_associated(sdata, ifsta); |
f0706e82 | 3360 | break; |
48c2fc59 | 3361 | case IEEE80211_STA_MLME_IBSS_SEARCH: |
f698d856 | 3362 | ieee80211_sta_find_ibss(sdata, ifsta); |
f0706e82 | 3363 | break; |
48c2fc59 | 3364 | case IEEE80211_STA_MLME_IBSS_JOINED: |
f698d856 | 3365 | ieee80211_sta_merge_ibss(sdata, ifsta); |
f0706e82 | 3366 | break; |
f709fc69 | 3367 | #ifdef CONFIG_MAC80211_MESH |
48c2fc59 | 3368 | case IEEE80211_STA_MLME_MESH_UP: |
f698d856 | 3369 | ieee80211_mesh_housekeeping(sdata, ifsta); |
f709fc69 LCC |
3370 | break; |
3371 | #endif | |
f0706e82 | 3372 | default: |
f4ea83dd | 3373 | WARN_ON(1); |
f0706e82 JB |
3374 | break; |
3375 | } | |
3376 | ||
f698d856 | 3377 | if (ieee80211_privacy_mismatch(sdata, ifsta)) { |
f0706e82 | 3378 | printk(KERN_DEBUG "%s: privacy configuration mismatch and " |
f698d856 | 3379 | "mixed-cell disabled - disassociate\n", sdata->dev->name); |
f0706e82 | 3380 | |
f698d856 JBG |
3381 | ieee80211_send_disassoc(sdata, ifsta, WLAN_REASON_UNSPECIFIED); |
3382 | ieee80211_set_disassoc(sdata, ifsta, 0); | |
f0706e82 JB |
3383 | } |
3384 | } | |
3385 | ||
3386 | ||
f698d856 | 3387 | static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
3388 | struct ieee80211_if_sta *ifsta) |
3389 | { | |
f698d856 | 3390 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
3391 | |
3392 | if (local->ops->reset_tsf) { | |
3393 | /* Reset own TSF to allow time synchronization work. */ | |
3394 | local->ops->reset_tsf(local_to_hw(local)); | |
3395 | } | |
3396 | ||
3397 | ifsta->wmm_last_param_set = -1; /* allow any WMM update */ | |
3398 | ||
3399 | ||
3400 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
3401 | ifsta->auth_alg = WLAN_AUTH_OPEN; | |
3402 | else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
3403 | ifsta->auth_alg = WLAN_AUTH_SHARED_KEY; | |
3404 | else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
3405 | ifsta->auth_alg = WLAN_AUTH_LEAP; | |
3406 | else | |
3407 | ifsta->auth_alg = WLAN_AUTH_OPEN; | |
f0706e82 | 3408 | ifsta->auth_transaction = -1; |
d6f2da5b | 3409 | ifsta->flags &= ~IEEE80211_STA_ASSOCIATED; |
6042a3e3 RR |
3410 | ifsta->assoc_scan_tries = 0; |
3411 | ifsta->auth_tries = 0; | |
3412 | ifsta->assoc_tries = 0; | |
f698d856 | 3413 | netif_carrier_off(sdata->dev); |
f0706e82 JB |
3414 | } |
3415 | ||
3416 | ||
f698d856 | 3417 | void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
3418 | struct ieee80211_if_sta *ifsta) |
3419 | { | |
f698d856 | 3420 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 3421 | |
51fb61e7 | 3422 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
f0706e82 JB |
3423 | return; |
3424 | ||
d6f2da5b JS |
3425 | if ((ifsta->flags & (IEEE80211_STA_BSSID_SET | |
3426 | IEEE80211_STA_AUTO_BSSID_SEL)) && | |
3427 | (ifsta->flags & (IEEE80211_STA_SSID_SET | | |
3428 | IEEE80211_STA_AUTO_SSID_SEL))) { | |
f0706e82 JB |
3429 | set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); |
3430 | queue_work(local->hw.workqueue, &ifsta->work); | |
3431 | } | |
3432 | } | |
3433 | ||
3434 | static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta, | |
3435 | const char *ssid, int ssid_len) | |
3436 | { | |
3437 | int tmp, hidden_ssid; | |
3438 | ||
48225709 MW |
3439 | if (ssid_len == ifsta->ssid_len && |
3440 | !memcmp(ifsta->ssid, ssid, ssid_len)) | |
f0706e82 JB |
3441 | return 1; |
3442 | ||
d6f2da5b | 3443 | if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) |
f0706e82 JB |
3444 | return 0; |
3445 | ||
3446 | hidden_ssid = 1; | |
3447 | tmp = ssid_len; | |
3448 | while (tmp--) { | |
3449 | if (ssid[tmp] != '\0') { | |
3450 | hidden_ssid = 0; | |
3451 | break; | |
3452 | } | |
3453 | } | |
3454 | ||
3455 | if (hidden_ssid && ifsta->ssid_len == ssid_len) | |
3456 | return 1; | |
3457 | ||
3458 | if (ssid_len == 1 && ssid[0] == ' ') | |
3459 | return 1; | |
3460 | ||
3461 | return 0; | |
3462 | } | |
3463 | ||
f698d856 | 3464 | static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
3465 | struct ieee80211_if_sta *ifsta) |
3466 | { | |
f698d856 | 3467 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
3468 | struct ieee80211_sta_bss *bss, *selected = NULL; |
3469 | int top_rssi = 0, freq; | |
3470 | ||
f0706e82 | 3471 | spin_lock_bh(&local->sta_bss_lock); |
8318d78a | 3472 | freq = local->oper_channel->center_freq; |
f0706e82 JB |
3473 | list_for_each_entry(bss, &local->sta_bss_list, list) { |
3474 | if (!(bss->capability & WLAN_CAPABILITY_ESS)) | |
3475 | continue; | |
3476 | ||
34a961f7 AK |
3477 | if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL | |
3478 | IEEE80211_STA_AUTO_BSSID_SEL | | |
3479 | IEEE80211_STA_AUTO_CHANNEL_SEL)) && | |
3480 | (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^ | |
3481 | !!sdata->default_key)) | |
f0706e82 JB |
3482 | continue; |
3483 | ||
d6f2da5b JS |
3484 | if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) && |
3485 | bss->freq != freq) | |
f0706e82 JB |
3486 | continue; |
3487 | ||
d6f2da5b | 3488 | if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) && |
f0706e82 JB |
3489 | memcmp(bss->bssid, ifsta->bssid, ETH_ALEN)) |
3490 | continue; | |
3491 | ||
d6f2da5b | 3492 | if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) && |
f0706e82 JB |
3493 | !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len)) |
3494 | continue; | |
3495 | ||
566bfe5a | 3496 | if (!selected || top_rssi < bss->signal) { |
f0706e82 | 3497 | selected = bss; |
566bfe5a | 3498 | top_rssi = bss->signal; |
f0706e82 JB |
3499 | } |
3500 | } | |
3501 | if (selected) | |
3502 | atomic_inc(&selected->users); | |
3503 | spin_unlock_bh(&local->sta_bss_lock); | |
3504 | ||
3505 | if (selected) { | |
f698d856 | 3506 | ieee80211_set_freq(sdata, selected->freq); |
d6f2da5b | 3507 | if (!(ifsta->flags & IEEE80211_STA_SSID_SET)) |
f698d856 | 3508 | ieee80211_sta_set_ssid(sdata, selected->ssid, |
f0706e82 | 3509 | selected->ssid_len); |
f698d856 JBG |
3510 | ieee80211_sta_set_bssid(sdata, selected->bssid); |
3511 | ieee80211_sta_def_wmm_params(sdata, selected, 0); | |
3e122be0 | 3512 | ieee80211_rx_bss_put(local, selected); |
48c2fc59 | 3513 | ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE; |
f698d856 | 3514 | ieee80211_sta_reset_auth(sdata, ifsta); |
f0706e82 JB |
3515 | return 0; |
3516 | } else { | |
6042a3e3 RR |
3517 | if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) { |
3518 | ifsta->assoc_scan_tries++; | |
d6f2da5b | 3519 | if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) |
f698d856 | 3520 | ieee80211_sta_start_scan(sdata, NULL, 0); |
b9bf1e60 | 3521 | else |
f698d856 | 3522 | ieee80211_sta_start_scan(sdata, ifsta->ssid, |
b9bf1e60 | 3523 | ifsta->ssid_len); |
48c2fc59 | 3524 | ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE; |
f0706e82 JB |
3525 | set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); |
3526 | } else | |
48c2fc59 | 3527 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
f0706e82 | 3528 | } |
f0706e82 JB |
3529 | return -1; |
3530 | } | |
3531 | ||
f0706e82 | 3532 | |
f698d856 | 3533 | static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
3534 | struct ieee80211_if_sta *ifsta) |
3535 | { | |
f698d856 | 3536 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 3537 | struct ieee80211_sta_bss *bss; |
8318d78a | 3538 | struct ieee80211_supported_band *sband; |
f0706e82 JB |
3539 | u8 bssid[ETH_ALEN], *pos; |
3540 | int i; | |
167ad6f7 | 3541 | int ret; |
0795af57 | 3542 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
3543 | |
3544 | #if 0 | |
3545 | /* Easier testing, use fixed BSSID. */ | |
3546 | memset(bssid, 0xfe, ETH_ALEN); | |
3547 | #else | |
3548 | /* Generate random, not broadcast, locally administered BSSID. Mix in | |
3549 | * own MAC address to make sure that devices that do not have proper | |
3550 | * random number generator get different BSSID. */ | |
3551 | get_random_bytes(bssid, ETH_ALEN); | |
3552 | for (i = 0; i < ETH_ALEN; i++) | |
f698d856 | 3553 | bssid[i] ^= sdata->dev->dev_addr[i]; |
f0706e82 JB |
3554 | bssid[0] &= ~0x01; |
3555 | bssid[0] |= 0x02; | |
3556 | #endif | |
3557 | ||
0795af57 | 3558 | printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n", |
f698d856 | 3559 | sdata->dev->name, print_mac(mac, bssid)); |
f0706e82 | 3560 | |
f698d856 | 3561 | bss = ieee80211_rx_bss_add(sdata, bssid, |
8318d78a | 3562 | local->hw.conf.channel->center_freq, |
cffdd30d | 3563 | sdata->u.sta.ssid, sdata->u.sta.ssid_len); |
f0706e82 JB |
3564 | if (!bss) |
3565 | return -ENOMEM; | |
3566 | ||
8318d78a JB |
3567 | bss->band = local->hw.conf.channel->band; |
3568 | sband = local->hw.wiphy->bands[bss->band]; | |
f0706e82 JB |
3569 | |
3570 | if (local->hw.conf.beacon_int == 0) | |
dc0ae30c | 3571 | local->hw.conf.beacon_int = 100; |
f0706e82 | 3572 | bss->beacon_int = local->hw.conf.beacon_int; |
f0706e82 JB |
3573 | bss->last_update = jiffies; |
3574 | bss->capability = WLAN_CAPABILITY_IBSS; | |
988c0f72 JB |
3575 | |
3576 | if (sdata->default_key) | |
f0706e82 | 3577 | bss->capability |= WLAN_CAPABILITY_PRIVACY; |
988c0f72 | 3578 | else |
f0706e82 | 3579 | sdata->drop_unencrypted = 0; |
988c0f72 | 3580 | |
8318d78a | 3581 | bss->supp_rates_len = sband->n_bitrates; |
f0706e82 | 3582 | pos = bss->supp_rates; |
8318d78a JB |
3583 | for (i = 0; i < sband->n_bitrates; i++) { |
3584 | int rate = sband->bitrates[i].bitrate; | |
f0706e82 JB |
3585 | *pos++ = (u8) (rate / 5); |
3586 | } | |
3587 | ||
f698d856 | 3588 | ret = ieee80211_sta_join_ibss(sdata, ifsta, bss); |
3e122be0 | 3589 | ieee80211_rx_bss_put(local, bss); |
167ad6f7 | 3590 | return ret; |
f0706e82 JB |
3591 | } |
3592 | ||
3593 | ||
f698d856 | 3594 | static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
3595 | struct ieee80211_if_sta *ifsta) |
3596 | { | |
f698d856 | 3597 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
3598 | struct ieee80211_sta_bss *bss; |
3599 | int found = 0; | |
3600 | u8 bssid[ETH_ALEN]; | |
3601 | int active_ibss; | |
0795af57 JP |
3602 | DECLARE_MAC_BUF(mac); |
3603 | DECLARE_MAC_BUF(mac2); | |
f0706e82 JB |
3604 | |
3605 | if (ifsta->ssid_len == 0) | |
3606 | return -EINVAL; | |
3607 | ||
f698d856 | 3608 | active_ibss = ieee80211_sta_active_ibss(sdata); |
f0706e82 JB |
3609 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
3610 | printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n", | |
f698d856 | 3611 | sdata->dev->name, active_ibss); |
f0706e82 JB |
3612 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
3613 | spin_lock_bh(&local->sta_bss_lock); | |
3614 | list_for_each_entry(bss, &local->sta_bss_list, list) { | |
3615 | if (ifsta->ssid_len != bss->ssid_len || | |
3616 | memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0 | |
3617 | || !(bss->capability & WLAN_CAPABILITY_IBSS)) | |
3618 | continue; | |
3619 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0795af57 JP |
3620 | printk(KERN_DEBUG " bssid=%s found\n", |
3621 | print_mac(mac, bss->bssid)); | |
f0706e82 JB |
3622 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
3623 | memcpy(bssid, bss->bssid, ETH_ALEN); | |
3624 | found = 1; | |
3625 | if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0) | |
3626 | break; | |
3627 | } | |
3628 | spin_unlock_bh(&local->sta_bss_lock); | |
3629 | ||
3630 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
6e43829b VK |
3631 | if (found) |
3632 | printk(KERN_DEBUG " sta_find_ibss: selected %s current " | |
3633 | "%s\n", print_mac(mac, bssid), | |
3634 | print_mac(mac2, ifsta->bssid)); | |
f0706e82 | 3635 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
80693ceb DD |
3636 | |
3637 | if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) { | |
167ad6f7 | 3638 | int ret; |
80693ceb DD |
3639 | int search_freq; |
3640 | ||
3641 | if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) | |
3642 | search_freq = bss->freq; | |
3643 | else | |
3644 | search_freq = local->hw.conf.channel->center_freq; | |
3645 | ||
f698d856 | 3646 | bss = ieee80211_rx_bss_get(local, bssid, search_freq, |
80693ceb DD |
3647 | ifsta->ssid, ifsta->ssid_len); |
3648 | if (!bss) | |
3649 | goto dont_join; | |
3650 | ||
0795af57 | 3651 | printk(KERN_DEBUG "%s: Selected IBSS BSSID %s" |
f0706e82 | 3652 | " based on configured SSID\n", |
f698d856 JBG |
3653 | sdata->dev->name, print_mac(mac, bssid)); |
3654 | ret = ieee80211_sta_join_ibss(sdata, ifsta, bss); | |
3e122be0 | 3655 | ieee80211_rx_bss_put(local, bss); |
167ad6f7 | 3656 | return ret; |
f0706e82 | 3657 | } |
80693ceb DD |
3658 | |
3659 | dont_join: | |
f0706e82 JB |
3660 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
3661 | printk(KERN_DEBUG " did not try to join ibss\n"); | |
3662 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
3663 | ||
3664 | /* Selected IBSS not found in current scan results - try to scan */ | |
48c2fc59 | 3665 | if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED && |
f698d856 | 3666 | !ieee80211_sta_active_ibss(sdata)) { |
f0706e82 JB |
3667 | mod_timer(&ifsta->timer, jiffies + |
3668 | IEEE80211_IBSS_MERGE_INTERVAL); | |
3669 | } else if (time_after(jiffies, local->last_scan_completed + | |
3670 | IEEE80211_SCAN_INTERVAL)) { | |
3671 | printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to " | |
f698d856 JBG |
3672 | "join\n", sdata->dev->name); |
3673 | return ieee80211_sta_req_scan(sdata, ifsta->ssid, | |
f0706e82 | 3674 | ifsta->ssid_len); |
48c2fc59 | 3675 | } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) { |
f0706e82 JB |
3676 | int interval = IEEE80211_SCAN_INTERVAL; |
3677 | ||
3678 | if (time_after(jiffies, ifsta->ibss_join_req + | |
3679 | IEEE80211_IBSS_JOIN_TIMEOUT)) { | |
d6f2da5b | 3680 | if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) && |
8318d78a JB |
3681 | (!(local->oper_channel->flags & |
3682 | IEEE80211_CHAN_NO_IBSS))) | |
f698d856 | 3683 | return ieee80211_sta_create_ibss(sdata, ifsta); |
d6f2da5b | 3684 | if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) { |
8318d78a | 3685 | printk(KERN_DEBUG "%s: IBSS not allowed on" |
f698d856 | 3686 | " %d MHz\n", sdata->dev->name, |
8318d78a | 3687 | local->hw.conf.channel->center_freq); |
f0706e82 JB |
3688 | } |
3689 | ||
3690 | /* No IBSS found - decrease scan interval and continue | |
3691 | * scanning. */ | |
3692 | interval = IEEE80211_SCAN_INTERVAL_SLOW; | |
3693 | } | |
3694 | ||
48c2fc59 | 3695 | ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH; |
f0706e82 JB |
3696 | mod_timer(&ifsta->timer, jiffies + interval); |
3697 | return 0; | |
3698 | } | |
3699 | ||
3700 | return 0; | |
3701 | } | |
3702 | ||
3703 | ||
f698d856 | 3704 | int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len) |
f0706e82 | 3705 | { |
f0706e82 | 3706 | struct ieee80211_if_sta *ifsta; |
9d139c81 | 3707 | int res; |
f0706e82 JB |
3708 | |
3709 | if (len > IEEE80211_MAX_SSID_LEN) | |
3710 | return -EINVAL; | |
3711 | ||
f0706e82 JB |
3712 | ifsta = &sdata->u.sta; |
3713 | ||
9d139c81 JB |
3714 | if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) { |
3715 | memset(ifsta->ssid, 0, sizeof(ifsta->ssid)); | |
3716 | memcpy(ifsta->ssid, ssid, len); | |
3717 | ifsta->ssid_len = len; | |
d6f2da5b | 3718 | ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
9d139c81 JB |
3719 | |
3720 | res = 0; | |
3721 | /* | |
3722 | * Hack! MLME code needs to be cleaned up to have different | |
3723 | * entry points for configuration and internal selection change | |
3724 | */ | |
3725 | if (netif_running(sdata->dev)) | |
3726 | res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID); | |
3727 | if (res) { | |
3728 | printk(KERN_DEBUG "%s: Failed to config new SSID to " | |
f698d856 | 3729 | "the low-level driver\n", sdata->dev->name); |
9d139c81 JB |
3730 | return res; |
3731 | } | |
3732 | } | |
f0706e82 | 3733 | |
d6f2da5b JS |
3734 | if (len) |
3735 | ifsta->flags |= IEEE80211_STA_SSID_SET; | |
3736 | else | |
3737 | ifsta->flags &= ~IEEE80211_STA_SSID_SET; | |
9d139c81 | 3738 | |
51fb61e7 | 3739 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && |
d6f2da5b | 3740 | !(ifsta->flags & IEEE80211_STA_BSSID_SET)) { |
f0706e82 | 3741 | ifsta->ibss_join_req = jiffies; |
48c2fc59 | 3742 | ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH; |
f698d856 | 3743 | return ieee80211_sta_find_ibss(sdata, ifsta); |
f0706e82 | 3744 | } |
9d139c81 | 3745 | |
f0706e82 JB |
3746 | return 0; |
3747 | } | |
3748 | ||
3749 | ||
f698d856 | 3750 | int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len) |
f0706e82 | 3751 | { |
f0706e82 JB |
3752 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
3753 | memcpy(ssid, ifsta->ssid, ifsta->ssid_len); | |
3754 | *len = ifsta->ssid_len; | |
3755 | return 0; | |
3756 | } | |
3757 | ||
3758 | ||
f698d856 | 3759 | int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid) |
f0706e82 | 3760 | { |
f0706e82 JB |
3761 | struct ieee80211_if_sta *ifsta; |
3762 | int res; | |
3763 | ||
f0706e82 JB |
3764 | ifsta = &sdata->u.sta; |
3765 | ||
3766 | if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) { | |
3767 | memcpy(ifsta->bssid, bssid, ETH_ALEN); | |
9d139c81 JB |
3768 | res = 0; |
3769 | /* | |
3770 | * Hack! See also ieee80211_sta_set_ssid. | |
3771 | */ | |
3772 | if (netif_running(sdata->dev)) | |
3773 | res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID); | |
f0706e82 JB |
3774 | if (res) { |
3775 | printk(KERN_DEBUG "%s: Failed to config new BSSID to " | |
f698d856 | 3776 | "the low-level driver\n", sdata->dev->name); |
f0706e82 JB |
3777 | return res; |
3778 | } | |
3779 | } | |
3780 | ||
d6f2da5b JS |
3781 | if (is_valid_ether_addr(bssid)) |
3782 | ifsta->flags |= IEEE80211_STA_BSSID_SET; | |
f0706e82 | 3783 | else |
d6f2da5b JS |
3784 | ifsta->flags &= ~IEEE80211_STA_BSSID_SET; |
3785 | ||
f0706e82 JB |
3786 | return 0; |
3787 | } | |
3788 | ||
3789 | ||
3790 | static void ieee80211_send_nullfunc(struct ieee80211_local *local, | |
3791 | struct ieee80211_sub_if_data *sdata, | |
3792 | int powersave) | |
3793 | { | |
3794 | struct sk_buff *skb; | |
3795 | struct ieee80211_hdr *nullfunc; | |
4e3996fe | 3796 | __le16 fc; |
f0706e82 JB |
3797 | |
3798 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24); | |
3799 | if (!skb) { | |
3800 | printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc " | |
3801 | "frame\n", sdata->dev->name); | |
3802 | return; | |
3803 | } | |
3804 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
3805 | ||
3806 | nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24); | |
3807 | memset(nullfunc, 0, 24); | |
4e3996fe HH |
3808 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | |
3809 | IEEE80211_FCTL_TODS); | |
f0706e82 | 3810 | if (powersave) |
4e3996fe HH |
3811 | fc |= cpu_to_le16(IEEE80211_FCTL_PM); |
3812 | nullfunc->frame_control = fc; | |
f0706e82 JB |
3813 | memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN); |
3814 | memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN); | |
3815 | memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN); | |
3816 | ||
f698d856 | 3817 | ieee80211_sta_tx(sdata, skb, 0); |
f0706e82 JB |
3818 | } |
3819 | ||
3820 | ||
69d3b6f4 JB |
3821 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
3822 | { | |
3823 | if (sdata->vif.type == IEEE80211_IF_TYPE_STA || | |
3824 | ieee80211_vif_is_mesh(&sdata->vif)) | |
3825 | ieee80211_sta_timer((unsigned long)sdata); | |
3826 | } | |
3827 | ||
f0706e82 JB |
3828 | void ieee80211_scan_completed(struct ieee80211_hw *hw) |
3829 | { | |
3830 | struct ieee80211_local *local = hw_to_local(hw); | |
3831 | struct net_device *dev = local->scan_dev; | |
3832 | struct ieee80211_sub_if_data *sdata; | |
3833 | union iwreq_data wrqu; | |
3834 | ||
3835 | local->last_scan_completed = jiffies; | |
ece8eddd ZY |
3836 | memset(&wrqu, 0, sizeof(wrqu)); |
3837 | wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL); | |
f0706e82 | 3838 | |
ece8eddd ZY |
3839 | if (local->sta_hw_scanning) { |
3840 | local->sta_hw_scanning = 0; | |
675ef586 MA |
3841 | if (ieee80211_hw_config(local)) |
3842 | printk(KERN_DEBUG "%s: failed to restore operational " | |
3843 | "channel after scan\n", dev->name); | |
69d3b6f4 JB |
3844 | /* Restart STA timer for HW scan case */ |
3845 | rcu_read_lock(); | |
3846 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
3847 | ieee80211_restart_sta_timer(sdata); | |
3848 | rcu_read_unlock(); | |
3849 | ||
ece8eddd ZY |
3850 | goto done; |
3851 | } | |
3852 | ||
3853 | local->sta_sw_scanning = 0; | |
f0706e82 | 3854 | if (ieee80211_hw_config(local)) |
4b50e388 | 3855 | printk(KERN_DEBUG "%s: failed to restore operational " |
f0706e82 JB |
3856 | "channel after scan\n", dev->name); |
3857 | ||
4150c572 JB |
3858 | |
3859 | netif_tx_lock_bh(local->mdev); | |
e308a5d8 | 3860 | netif_addr_lock(local->mdev); |
4150c572 JB |
3861 | local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC; |
3862 | local->ops->configure_filter(local_to_hw(local), | |
3863 | FIF_BCN_PRBRESP_PROMISC, | |
3864 | &local->filter_flags, | |
3865 | local->mdev->mc_count, | |
3866 | local->mdev->mc_list); | |
3867 | ||
e308a5d8 | 3868 | netif_addr_unlock(local->mdev); |
4150c572 | 3869 | netif_tx_unlock_bh(local->mdev); |
f0706e82 | 3870 | |
79010420 JB |
3871 | rcu_read_lock(); |
3872 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
69d3b6f4 JB |
3873 | /* Tell AP we're back */ |
3874 | if (sdata->vif.type == IEEE80211_IF_TYPE_STA && | |
3875 | sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED) | |
3876 | ieee80211_send_nullfunc(local, sdata, 0); | |
14042cbe | 3877 | |
69d3b6f4 | 3878 | ieee80211_restart_sta_timer(sdata); |
f709fc69 | 3879 | |
f0706e82 JB |
3880 | netif_wake_queue(sdata->dev); |
3881 | } | |
79010420 | 3882 | rcu_read_unlock(); |
f0706e82 | 3883 | |
ece8eddd | 3884 | done: |
f0706e82 | 3885 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
51fb61e7 | 3886 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) { |
f0706e82 | 3887 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
d6f2da5b | 3888 | if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) || |
48c2fc59 | 3889 | (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) && |
f698d856 JBG |
3890 | !ieee80211_sta_active_ibss(sdata))) |
3891 | ieee80211_sta_find_ibss(sdata, ifsta); | |
f0706e82 JB |
3892 | } |
3893 | } | |
3894 | EXPORT_SYMBOL(ieee80211_scan_completed); | |
3895 | ||
3896 | void ieee80211_sta_scan_work(struct work_struct *work) | |
3897 | { | |
3898 | struct ieee80211_local *local = | |
3899 | container_of(work, struct ieee80211_local, scan_work.work); | |
3900 | struct net_device *dev = local->scan_dev; | |
3901 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
8318d78a | 3902 | struct ieee80211_supported_band *sband; |
f0706e82 JB |
3903 | struct ieee80211_channel *chan; |
3904 | int skip; | |
3905 | unsigned long next_delay = 0; | |
3906 | ||
ece8eddd | 3907 | if (!local->sta_sw_scanning) |
f0706e82 JB |
3908 | return; |
3909 | ||
3910 | switch (local->scan_state) { | |
3911 | case SCAN_SET_CHANNEL: | |
69d464d5 JB |
3912 | /* |
3913 | * Get current scan band. scan_band may be IEEE80211_NUM_BANDS | |
3914 | * after we successfully scanned the last channel of the last | |
3915 | * band (and the last band is supported by the hw) | |
3916 | */ | |
8318d78a JB |
3917 | if (local->scan_band < IEEE80211_NUM_BANDS) |
3918 | sband = local->hw.wiphy->bands[local->scan_band]; | |
3919 | else | |
3920 | sband = NULL; | |
3921 | ||
69d464d5 JB |
3922 | /* |
3923 | * If we are at an unsupported band and have more bands | |
3924 | * left to scan, advance to the next supported one. | |
3925 | */ | |
3926 | while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) { | |
8318d78a JB |
3927 | local->scan_band++; |
3928 | sband = local->hw.wiphy->bands[local->scan_band]; | |
3929 | local->scan_channel_idx = 0; | |
3930 | } | |
3931 | ||
69d464d5 JB |
3932 | /* if no more bands/channels left, complete scan */ |
3933 | if (!sband || local->scan_channel_idx >= sband->n_channels) { | |
f0706e82 JB |
3934 | ieee80211_scan_completed(local_to_hw(local)); |
3935 | return; | |
3936 | } | |
8318d78a JB |
3937 | skip = 0; |
3938 | chan = &sband->channels[local->scan_channel_idx]; | |
3939 | ||
3940 | if (chan->flags & IEEE80211_CHAN_DISABLED || | |
51fb61e7 | 3941 | (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && |
8318d78a | 3942 | chan->flags & IEEE80211_CHAN_NO_IBSS)) |
f0706e82 JB |
3943 | skip = 1; |
3944 | ||
3945 | if (!skip) { | |
f0706e82 JB |
3946 | local->scan_channel = chan; |
3947 | if (ieee80211_hw_config(local)) { | |
8318d78a JB |
3948 | printk(KERN_DEBUG "%s: failed to set freq to " |
3949 | "%d MHz for scan\n", dev->name, | |
3950 | chan->center_freq); | |
f0706e82 JB |
3951 | skip = 1; |
3952 | } | |
3953 | } | |
3954 | ||
69d464d5 | 3955 | /* advance state machine to next channel/band */ |
f0706e82 | 3956 | local->scan_channel_idx++; |
8318d78a | 3957 | if (local->scan_channel_idx >= sband->n_channels) { |
69d464d5 JB |
3958 | /* |
3959 | * scan_band may end up == IEEE80211_NUM_BANDS, but | |
3960 | * we'll catch that case above and complete the scan | |
3961 | * if that is the case. | |
3962 | */ | |
8318d78a JB |
3963 | local->scan_band++; |
3964 | local->scan_channel_idx = 0; | |
f0706e82 JB |
3965 | } |
3966 | ||
3967 | if (skip) | |
3968 | break; | |
3969 | ||
3970 | next_delay = IEEE80211_PROBE_DELAY + | |
3971 | usecs_to_jiffies(local->hw.channel_change_time); | |
3972 | local->scan_state = SCAN_SEND_PROBE; | |
3973 | break; | |
3974 | case SCAN_SEND_PROBE: | |
8318d78a | 3975 | next_delay = IEEE80211_PASSIVE_CHANNEL_TIME; |
f0706e82 | 3976 | local->scan_state = SCAN_SET_CHANNEL; |
8318d78a JB |
3977 | |
3978 | if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN) | |
3979 | break; | |
f698d856 | 3980 | ieee80211_send_probe_req(sdata, NULL, local->scan_ssid, |
8318d78a JB |
3981 | local->scan_ssid_len); |
3982 | next_delay = IEEE80211_CHANNEL_TIME; | |
f0706e82 JB |
3983 | break; |
3984 | } | |
3985 | ||
ece8eddd | 3986 | if (local->sta_sw_scanning) |
f0706e82 JB |
3987 | queue_delayed_work(local->hw.workqueue, &local->scan_work, |
3988 | next_delay); | |
3989 | } | |
3990 | ||
3991 | ||
f698d856 | 3992 | static int ieee80211_sta_start_scan(struct ieee80211_sub_if_data *scan_sdata, |
f0706e82 JB |
3993 | u8 *ssid, size_t ssid_len) |
3994 | { | |
f698d856 | 3995 | struct ieee80211_local *local = scan_sdata->local; |
f0706e82 JB |
3996 | struct ieee80211_sub_if_data *sdata; |
3997 | ||
3998 | if (ssid_len > IEEE80211_MAX_SSID_LEN) | |
3999 | return -EINVAL; | |
4000 | ||
4001 | /* MLME-SCAN.request (page 118) page 144 (11.1.3.1) | |
4002 | * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS | |
4003 | * BSSID: MACAddress | |
4004 | * SSID | |
4005 | * ScanType: ACTIVE, PASSIVE | |
4006 | * ProbeDelay: delay (in microseconds) to be used prior to transmitting | |
4007 | * a Probe frame during active scanning | |
4008 | * ChannelList | |
4009 | * MinChannelTime (>= ProbeDelay), in TU | |
4010 | * MaxChannelTime: (>= MinChannelTime), in TU | |
4011 | */ | |
4012 | ||
4013 | /* MLME-SCAN.confirm | |
4014 | * BSSDescriptionSet | |
4015 | * ResultCode: SUCCESS, INVALID_PARAMETERS | |
4016 | */ | |
4017 | ||
ece8eddd | 4018 | if (local->sta_sw_scanning || local->sta_hw_scanning) { |
f698d856 | 4019 | if (local->scan_dev == scan_sdata->dev) |
f0706e82 JB |
4020 | return 0; |
4021 | return -EBUSY; | |
4022 | } | |
4023 | ||
4024 | if (local->ops->hw_scan) { | |
4025 | int rc = local->ops->hw_scan(local_to_hw(local), | |
ece8eddd | 4026 | ssid, ssid_len); |
f0706e82 | 4027 | if (!rc) { |
ece8eddd | 4028 | local->sta_hw_scanning = 1; |
f698d856 | 4029 | local->scan_dev = scan_sdata->dev; |
f0706e82 JB |
4030 | } |
4031 | return rc; | |
4032 | } | |
4033 | ||
ece8eddd | 4034 | local->sta_sw_scanning = 1; |
f0706e82 | 4035 | |
79010420 JB |
4036 | rcu_read_lock(); |
4037 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
f0706e82 | 4038 | netif_stop_queue(sdata->dev); |
51fb61e7 | 4039 | if (sdata->vif.type == IEEE80211_IF_TYPE_STA && |
d6f2da5b | 4040 | (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)) |
f0706e82 JB |
4041 | ieee80211_send_nullfunc(local, sdata, 1); |
4042 | } | |
79010420 | 4043 | rcu_read_unlock(); |
f0706e82 JB |
4044 | |
4045 | if (ssid) { | |
4046 | local->scan_ssid_len = ssid_len; | |
4047 | memcpy(local->scan_ssid, ssid, ssid_len); | |
4048 | } else | |
4049 | local->scan_ssid_len = 0; | |
4050 | local->scan_state = SCAN_SET_CHANNEL; | |
f0706e82 | 4051 | local->scan_channel_idx = 0; |
8318d78a | 4052 | local->scan_band = IEEE80211_BAND_2GHZ; |
f698d856 | 4053 | local->scan_dev = scan_sdata->dev; |
f0706e82 | 4054 | |
b9e40857 | 4055 | netif_addr_lock_bh(local->mdev); |
4150c572 JB |
4056 | local->filter_flags |= FIF_BCN_PRBRESP_PROMISC; |
4057 | local->ops->configure_filter(local_to_hw(local), | |
4058 | FIF_BCN_PRBRESP_PROMISC, | |
4059 | &local->filter_flags, | |
4060 | local->mdev->mc_count, | |
4061 | local->mdev->mc_list); | |
b9e40857 | 4062 | netif_addr_unlock_bh(local->mdev); |
f0706e82 JB |
4063 | |
4064 | /* TODO: start scan as soon as all nullfunc frames are ACKed */ | |
4065 | queue_delayed_work(local->hw.workqueue, &local->scan_work, | |
4066 | IEEE80211_CHANNEL_TIME); | |
4067 | ||
4068 | return 0; | |
4069 | } | |
4070 | ||
4071 | ||
f698d856 | 4072 | int ieee80211_sta_req_scan(struct ieee80211_sub_if_data *sdata, u8 *ssid, size_t ssid_len) |
f0706e82 | 4073 | { |
f0706e82 | 4074 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
f698d856 | 4075 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 4076 | |
51fb61e7 | 4077 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
f698d856 | 4078 | return ieee80211_sta_start_scan(sdata, ssid, ssid_len); |
f0706e82 | 4079 | |
ece8eddd | 4080 | if (local->sta_sw_scanning || local->sta_hw_scanning) { |
f698d856 | 4081 | if (local->scan_dev == sdata->dev) |
f0706e82 JB |
4082 | return 0; |
4083 | return -EBUSY; | |
4084 | } | |
4085 | ||
a0af5f14 HS |
4086 | ifsta->scan_ssid_len = ssid_len; |
4087 | if (ssid_len) | |
4088 | memcpy(ifsta->scan_ssid, ssid, ssid_len); | |
f0706e82 JB |
4089 | set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request); |
4090 | queue_work(local->hw.workqueue, &ifsta->work); | |
4091 | return 0; | |
4092 | } | |
4093 | ||
4094 | static char * | |
f698d856 | 4095 | ieee80211_sta_scan_result(struct ieee80211_local *local, |
ccc58057 | 4096 | struct iw_request_info *info, |
f0706e82 JB |
4097 | struct ieee80211_sta_bss *bss, |
4098 | char *current_ev, char *end_buf) | |
4099 | { | |
f0706e82 JB |
4100 | struct iw_event iwe; |
4101 | ||
4102 | if (time_after(jiffies, | |
4103 | bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE)) | |
4104 | return current_ev; | |
4105 | ||
f0706e82 JB |
4106 | memset(&iwe, 0, sizeof(iwe)); |
4107 | iwe.cmd = SIOCGIWAP; | |
4108 | iwe.u.ap_addr.sa_family = ARPHRD_ETHER; | |
4109 | memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN); | |
ccc58057 | 4110 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, |
f0706e82 JB |
4111 | IW_EV_ADDR_LEN); |
4112 | ||
4113 | memset(&iwe, 0, sizeof(iwe)); | |
4114 | iwe.cmd = SIOCGIWESSID; | |
902acc78 JB |
4115 | if (bss_mesh_cfg(bss)) { |
4116 | iwe.u.data.length = bss_mesh_id_len(bss); | |
f709fc69 | 4117 | iwe.u.data.flags = 1; |
ccc58057 DM |
4118 | current_ev = iwe_stream_add_point(info, current_ev, end_buf, |
4119 | &iwe, bss_mesh_id(bss)); | |
f709fc69 LCC |
4120 | } else { |
4121 | iwe.u.data.length = bss->ssid_len; | |
4122 | iwe.u.data.flags = 1; | |
ccc58057 DM |
4123 | current_ev = iwe_stream_add_point(info, current_ev, end_buf, |
4124 | &iwe, bss->ssid); | |
f709fc69 | 4125 | } |
f0706e82 | 4126 | |
1d1b5359 LCC |
4127 | if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS) |
4128 | || bss_mesh_cfg(bss)) { | |
f0706e82 JB |
4129 | memset(&iwe, 0, sizeof(iwe)); |
4130 | iwe.cmd = SIOCGIWMODE; | |
902acc78 | 4131 | if (bss_mesh_cfg(bss)) |
f709fc69 LCC |
4132 | iwe.u.mode = IW_MODE_MESH; |
4133 | else if (bss->capability & WLAN_CAPABILITY_ESS) | |
f0706e82 JB |
4134 | iwe.u.mode = IW_MODE_MASTER; |
4135 | else | |
4136 | iwe.u.mode = IW_MODE_ADHOC; | |
ccc58057 DM |
4137 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, |
4138 | &iwe, IW_EV_UINT_LEN); | |
f0706e82 JB |
4139 | } |
4140 | ||
4141 | memset(&iwe, 0, sizeof(iwe)); | |
4142 | iwe.cmd = SIOCGIWFREQ; | |
9381be05 TW |
4143 | iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq); |
4144 | iwe.u.freq.e = 0; | |
ccc58057 | 4145 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, |
f0706e82 | 4146 | IW_EV_FREQ_LEN); |
8318d78a JB |
4147 | |
4148 | memset(&iwe, 0, sizeof(iwe)); | |
4149 | iwe.cmd = SIOCGIWFREQ; | |
9381be05 TW |
4150 | iwe.u.freq.m = bss->freq; |
4151 | iwe.u.freq.e = 6; | |
ccc58057 | 4152 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, |
f0706e82 | 4153 | IW_EV_FREQ_LEN); |
f0706e82 JB |
4154 | memset(&iwe, 0, sizeof(iwe)); |
4155 | iwe.cmd = IWEVQUAL; | |
566bfe5a BR |
4156 | iwe.u.qual.qual = bss->qual; |
4157 | iwe.u.qual.level = bss->signal; | |
f0706e82 JB |
4158 | iwe.u.qual.noise = bss->noise; |
4159 | iwe.u.qual.updated = local->wstats_flags; | |
ccc58057 | 4160 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, |
f0706e82 JB |
4161 | IW_EV_QUAL_LEN); |
4162 | ||
4163 | memset(&iwe, 0, sizeof(iwe)); | |
4164 | iwe.cmd = SIOCGIWENCODE; | |
4165 | if (bss->capability & WLAN_CAPABILITY_PRIVACY) | |
4166 | iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY; | |
4167 | else | |
4168 | iwe.u.data.flags = IW_ENCODE_DISABLED; | |
4169 | iwe.u.data.length = 0; | |
ccc58057 DM |
4170 | current_ev = iwe_stream_add_point(info, current_ev, end_buf, |
4171 | &iwe, ""); | |
f0706e82 JB |
4172 | |
4173 | if (bss && bss->wpa_ie) { | |
4174 | memset(&iwe, 0, sizeof(iwe)); | |
4175 | iwe.cmd = IWEVGENIE; | |
4176 | iwe.u.data.length = bss->wpa_ie_len; | |
ccc58057 DM |
4177 | current_ev = iwe_stream_add_point(info, current_ev, end_buf, |
4178 | &iwe, bss->wpa_ie); | |
f0706e82 JB |
4179 | } |
4180 | ||
4181 | if (bss && bss->rsn_ie) { | |
4182 | memset(&iwe, 0, sizeof(iwe)); | |
4183 | iwe.cmd = IWEVGENIE; | |
4184 | iwe.u.data.length = bss->rsn_ie_len; | |
ccc58057 DM |
4185 | current_ev = iwe_stream_add_point(info, current_ev, end_buf, |
4186 | &iwe, bss->rsn_ie); | |
f0706e82 JB |
4187 | } |
4188 | ||
e623157b EG |
4189 | if (bss && bss->ht_ie) { |
4190 | memset(&iwe, 0, sizeof(iwe)); | |
4191 | iwe.cmd = IWEVGENIE; | |
4192 | iwe.u.data.length = bss->ht_ie_len; | |
ccc58057 DM |
4193 | current_ev = iwe_stream_add_point(info, current_ev, end_buf, |
4194 | &iwe, bss->ht_ie); | |
e623157b EG |
4195 | } |
4196 | ||
f0706e82 JB |
4197 | if (bss && bss->supp_rates_len > 0) { |
4198 | /* display all supported rates in readable format */ | |
ccc58057 | 4199 | char *p = current_ev + iwe_stream_lcp_len(info); |
f0706e82 JB |
4200 | int i; |
4201 | ||
4202 | memset(&iwe, 0, sizeof(iwe)); | |
4203 | iwe.cmd = SIOCGIWRATE; | |
4204 | /* Those two flags are ignored... */ | |
4205 | iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0; | |
4206 | ||
4207 | for (i = 0; i < bss->supp_rates_len; i++) { | |
4208 | iwe.u.bitrate.value = ((bss->supp_rates[i] & | |
4209 | 0x7f) * 500000); | |
ccc58057 | 4210 | p = iwe_stream_add_value(info, current_ev, p, |
f0706e82 JB |
4211 | end_buf, &iwe, IW_EV_PARAM_LEN); |
4212 | } | |
4213 | current_ev = p; | |
4214 | } | |
4215 | ||
4216 | if (bss) { | |
4217 | char *buf; | |
4218 | buf = kmalloc(30, GFP_ATOMIC); | |
4219 | if (buf) { | |
4220 | memset(&iwe, 0, sizeof(iwe)); | |
4221 | iwe.cmd = IWEVCUSTOM; | |
4222 | sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp)); | |
4223 | iwe.u.data.length = strlen(buf); | |
ccc58057 DM |
4224 | current_ev = iwe_stream_add_point(info, current_ev, |
4225 | end_buf, | |
f0706e82 | 4226 | &iwe, buf); |
bf998f68 EG |
4227 | memset(&iwe, 0, sizeof(iwe)); |
4228 | iwe.cmd = IWEVCUSTOM; | |
4229 | sprintf(buf, " Last beacon: %dms ago", | |
4230 | jiffies_to_msecs(jiffies - bss->last_update)); | |
4231 | iwe.u.data.length = strlen(buf); | |
4232 | current_ev = iwe_stream_add_point(info, current_ev, | |
4233 | end_buf, &iwe, buf); | |
f0706e82 JB |
4234 | kfree(buf); |
4235 | } | |
4236 | } | |
4237 | ||
902acc78 | 4238 | if (bss_mesh_cfg(bss)) { |
f709fc69 | 4239 | char *buf; |
24736701 | 4240 | u8 *cfg = bss_mesh_cfg(bss); |
4f5d4c4d | 4241 | buf = kmalloc(50, GFP_ATOMIC); |
f709fc69 LCC |
4242 | if (buf) { |
4243 | memset(&iwe, 0, sizeof(iwe)); | |
4244 | iwe.cmd = IWEVCUSTOM; | |
24736701 | 4245 | sprintf(buf, "Mesh network (version %d)", cfg[0]); |
4f5d4c4d | 4246 | iwe.u.data.length = strlen(buf); |
ccc58057 DM |
4247 | current_ev = iwe_stream_add_point(info, current_ev, |
4248 | end_buf, | |
4f5d4c4d LCC |
4249 | &iwe, buf); |
4250 | sprintf(buf, "Path Selection Protocol ID: " | |
24736701 JL |
4251 | "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3], |
4252 | cfg[4]); | |
4f5d4c4d | 4253 | iwe.u.data.length = strlen(buf); |
ccc58057 DM |
4254 | current_ev = iwe_stream_add_point(info, current_ev, |
4255 | end_buf, | |
4f5d4c4d LCC |
4256 | &iwe, buf); |
4257 | sprintf(buf, "Path Selection Metric ID: " | |
24736701 JL |
4258 | "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7], |
4259 | cfg[8]); | |
4f5d4c4d | 4260 | iwe.u.data.length = strlen(buf); |
ccc58057 DM |
4261 | current_ev = iwe_stream_add_point(info, current_ev, |
4262 | end_buf, | |
4f5d4c4d LCC |
4263 | &iwe, buf); |
4264 | sprintf(buf, "Congestion Control Mode ID: " | |
24736701 JL |
4265 | "0x%02X%02X%02X%02X", cfg[9], cfg[10], |
4266 | cfg[11], cfg[12]); | |
4f5d4c4d | 4267 | iwe.u.data.length = strlen(buf); |
ccc58057 DM |
4268 | current_ev = iwe_stream_add_point(info, current_ev, |
4269 | end_buf, | |
4f5d4c4d LCC |
4270 | &iwe, buf); |
4271 | sprintf(buf, "Channel Precedence: " | |
24736701 JL |
4272 | "0x%02X%02X%02X%02X", cfg[13], cfg[14], |
4273 | cfg[15], cfg[16]); | |
f709fc69 | 4274 | iwe.u.data.length = strlen(buf); |
ccc58057 DM |
4275 | current_ev = iwe_stream_add_point(info, current_ev, |
4276 | end_buf, | |
f709fc69 LCC |
4277 | &iwe, buf); |
4278 | kfree(buf); | |
4279 | } | |
4280 | } | |
4281 | ||
f0706e82 JB |
4282 | return current_ev; |
4283 | } | |
4284 | ||
4285 | ||
f698d856 | 4286 | int ieee80211_sta_scan_results(struct ieee80211_local *local, |
ccc58057 DM |
4287 | struct iw_request_info *info, |
4288 | char *buf, size_t len) | |
f0706e82 | 4289 | { |
f0706e82 JB |
4290 | char *current_ev = buf; |
4291 | char *end_buf = buf + len; | |
4292 | struct ieee80211_sta_bss *bss; | |
4293 | ||
4294 | spin_lock_bh(&local->sta_bss_lock); | |
4295 | list_for_each_entry(bss, &local->sta_bss_list, list) { | |
4296 | if (buf + len - current_ev <= IW_EV_ADDR_LEN) { | |
4297 | spin_unlock_bh(&local->sta_bss_lock); | |
4298 | return -E2BIG; | |
4299 | } | |
f698d856 | 4300 | current_ev = ieee80211_sta_scan_result(local, info, bss, |
ccc58057 | 4301 | current_ev, end_buf); |
f0706e82 JB |
4302 | } |
4303 | spin_unlock_bh(&local->sta_bss_lock); | |
4304 | return current_ev - buf; | |
4305 | } | |
4306 | ||
4307 | ||
f698d856 | 4308 | int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len) |
f0706e82 | 4309 | { |
f0706e82 | 4310 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
988c0f72 | 4311 | |
f0706e82 JB |
4312 | kfree(ifsta->extra_ie); |
4313 | if (len == 0) { | |
4314 | ifsta->extra_ie = NULL; | |
4315 | ifsta->extra_ie_len = 0; | |
4316 | return 0; | |
4317 | } | |
4318 | ifsta->extra_ie = kmalloc(len, GFP_KERNEL); | |
4319 | if (!ifsta->extra_ie) { | |
4320 | ifsta->extra_ie_len = 0; | |
4321 | return -ENOMEM; | |
4322 | } | |
4323 | memcpy(ifsta->extra_ie, ie, len); | |
4324 | ifsta->extra_ie_len = len; | |
4325 | return 0; | |
4326 | } | |
4327 | ||
4328 | ||
f698d856 | 4329 | struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, |
988c0f72 | 4330 | struct sk_buff *skb, u8 *bssid, |
87291c02 | 4331 | u8 *addr, u64 supp_rates) |
f0706e82 | 4332 | { |
f698d856 | 4333 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 4334 | struct sta_info *sta; |
0795af57 | 4335 | DECLARE_MAC_BUF(mac); |
87291c02 | 4336 | int band = local->hw.conf.channel->band; |
f0706e82 JB |
4337 | |
4338 | /* TODO: Could consider removing the least recently used entry and | |
4339 | * allow new one to be added. */ | |
4340 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { | |
4341 | if (net_ratelimit()) { | |
4342 | printk(KERN_DEBUG "%s: No room for a new IBSS STA " | |
f698d856 | 4343 | "entry %s\n", sdata->dev->name, print_mac(mac, addr)); |
f0706e82 JB |
4344 | } |
4345 | return NULL; | |
4346 | } | |
4347 | ||
1e188637 | 4348 | if (compare_ether_addr(bssid, sdata->u.sta.bssid)) |
87291c02 VK |
4349 | return NULL; |
4350 | ||
f4ea83dd | 4351 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
0795af57 | 4352 | printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n", |
f698d856 | 4353 | wiphy_name(local->hw.wiphy), print_mac(mac, addr), sdata->dev->name); |
f4ea83dd | 4354 | #endif |
f0706e82 | 4355 | |
73651ee6 JB |
4356 | sta = sta_info_alloc(sdata, addr, GFP_ATOMIC); |
4357 | if (!sta) | |
f0706e82 JB |
4358 | return NULL; |
4359 | ||
07346f81 | 4360 | set_sta_flags(sta, WLAN_STA_AUTHORIZED); |
238814fd | 4361 | |
87291c02 VK |
4362 | if (supp_rates) |
4363 | sta->supp_rates[band] = supp_rates; | |
4364 | else | |
4365 | sta->supp_rates[band] = sdata->u.sta.supp_rates_bits[band]; | |
f0706e82 JB |
4366 | |
4367 | rate_control_rate_init(sta, local); | |
4368 | ||
93e5deb1 | 4369 | if (sta_info_insert(sta)) |
73651ee6 | 4370 | return NULL; |
73651ee6 | 4371 | |
d0709a65 | 4372 | return sta; |
f0706e82 JB |
4373 | } |
4374 | ||
4375 | ||
f698d856 | 4376 | int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 4377 | { |
f0706e82 JB |
4378 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
4379 | ||
f4ea83dd | 4380 | printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n", |
f698d856 | 4381 | sdata->dev->name, reason); |
f0706e82 | 4382 | |
51fb61e7 JB |
4383 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA && |
4384 | sdata->vif.type != IEEE80211_IF_TYPE_IBSS) | |
f0706e82 JB |
4385 | return -EINVAL; |
4386 | ||
f698d856 JBG |
4387 | ieee80211_send_deauth(sdata, ifsta, reason); |
4388 | ieee80211_set_disassoc(sdata, ifsta, 1); | |
f0706e82 JB |
4389 | return 0; |
4390 | } | |
4391 | ||
4392 | ||
f698d856 | 4393 | int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 4394 | { |
f0706e82 JB |
4395 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
4396 | ||
f4ea83dd | 4397 | printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n", |
f698d856 | 4398 | sdata->dev->name, reason); |
f0706e82 | 4399 | |
51fb61e7 | 4400 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
f0706e82 JB |
4401 | return -EINVAL; |
4402 | ||
d6f2da5b | 4403 | if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED)) |
f0706e82 JB |
4404 | return -1; |
4405 | ||
f698d856 JBG |
4406 | ieee80211_send_disassoc(sdata, ifsta, reason); |
4407 | ieee80211_set_disassoc(sdata, ifsta, 0); | |
f0706e82 JB |
4408 | return 0; |
4409 | } | |
84363e6e MA |
4410 | |
4411 | void ieee80211_notify_mac(struct ieee80211_hw *hw, | |
4412 | enum ieee80211_notification_types notif_type) | |
4413 | { | |
4414 | struct ieee80211_local *local = hw_to_local(hw); | |
4415 | struct ieee80211_sub_if_data *sdata; | |
4416 | ||
4417 | switch (notif_type) { | |
4418 | case IEEE80211_NOTIFY_RE_ASSOC: | |
4419 | rcu_read_lock(); | |
4420 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
3e122be0 JB |
4421 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
4422 | continue; | |
84363e6e | 4423 | |
f698d856 | 4424 | ieee80211_sta_req_auth(sdata, &sdata->u.sta); |
84363e6e MA |
4425 | } |
4426 | rcu_read_unlock(); | |
4427 | break; | |
4428 | } | |
4429 | } | |
4430 | EXPORT_SYMBOL(ieee80211_notify_mac); |