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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)); | |
43ac2ca3 JM |
101 | elems->ie_start = start; |
102 | elems->total_len = len; | |
f0706e82 JB |
103 | |
104 | while (left >= 2) { | |
105 | u8 id, elen; | |
106 | ||
107 | id = *pos++; | |
108 | elen = *pos++; | |
109 | left -= 2; | |
110 | ||
67a4cce4 JL |
111 | if (elen > left) |
112 | return; | |
f0706e82 JB |
113 | |
114 | switch (id) { | |
115 | case WLAN_EID_SSID: | |
116 | elems->ssid = pos; | |
117 | elems->ssid_len = elen; | |
118 | break; | |
119 | case WLAN_EID_SUPP_RATES: | |
120 | elems->supp_rates = pos; | |
121 | elems->supp_rates_len = elen; | |
122 | break; | |
123 | case WLAN_EID_FH_PARAMS: | |
124 | elems->fh_params = pos; | |
125 | elems->fh_params_len = elen; | |
126 | break; | |
127 | case WLAN_EID_DS_PARAMS: | |
128 | elems->ds_params = pos; | |
129 | elems->ds_params_len = elen; | |
130 | break; | |
131 | case WLAN_EID_CF_PARAMS: | |
132 | elems->cf_params = pos; | |
133 | elems->cf_params_len = elen; | |
134 | break; | |
135 | case WLAN_EID_TIM: | |
136 | elems->tim = pos; | |
137 | elems->tim_len = elen; | |
138 | break; | |
139 | case WLAN_EID_IBSS_PARAMS: | |
140 | elems->ibss_params = pos; | |
141 | elems->ibss_params_len = elen; | |
142 | break; | |
143 | case WLAN_EID_CHALLENGE: | |
144 | elems->challenge = pos; | |
145 | elems->challenge_len = elen; | |
146 | break; | |
147 | case WLAN_EID_WPA: | |
148 | if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && | |
149 | pos[2] == 0xf2) { | |
150 | /* Microsoft OUI (00:50:F2) */ | |
151 | if (pos[3] == 1) { | |
152 | /* OUI Type 1 - WPA IE */ | |
153 | elems->wpa = pos; | |
154 | elems->wpa_len = elen; | |
155 | } else if (elen >= 5 && pos[3] == 2) { | |
156 | if (pos[4] == 0) { | |
157 | elems->wmm_info = pos; | |
158 | elems->wmm_info_len = elen; | |
159 | } else if (pos[4] == 1) { | |
160 | elems->wmm_param = pos; | |
161 | elems->wmm_param_len = elen; | |
162 | } | |
163 | } | |
164 | } | |
165 | break; | |
166 | case WLAN_EID_RSN: | |
167 | elems->rsn = pos; | |
168 | elems->rsn_len = elen; | |
169 | break; | |
170 | case WLAN_EID_ERP_INFO: | |
171 | elems->erp_info = pos; | |
172 | elems->erp_info_len = elen; | |
173 | break; | |
174 | case WLAN_EID_EXT_SUPP_RATES: | |
175 | elems->ext_supp_rates = pos; | |
176 | elems->ext_supp_rates_len = elen; | |
177 | break; | |
c7153508 RR |
178 | case WLAN_EID_HT_CAPABILITY: |
179 | elems->ht_cap_elem = pos; | |
180 | elems->ht_cap_elem_len = elen; | |
181 | break; | |
182 | case WLAN_EID_HT_EXTRA_INFO: | |
183 | elems->ht_info_elem = pos; | |
184 | elems->ht_info_elem_len = elen; | |
185 | break; | |
ee385855 LCC |
186 | case WLAN_EID_MESH_ID: |
187 | elems->mesh_id = pos; | |
188 | elems->mesh_id_len = elen; | |
189 | break; | |
190 | case WLAN_EID_MESH_CONFIG: | |
191 | elems->mesh_config = pos; | |
192 | elems->mesh_config_len = elen; | |
193 | break; | |
194 | case WLAN_EID_PEER_LINK: | |
195 | elems->peer_link = pos; | |
196 | elems->peer_link_len = elen; | |
197 | break; | |
198 | case WLAN_EID_PREQ: | |
199 | elems->preq = pos; | |
200 | elems->preq_len = elen; | |
201 | break; | |
202 | case WLAN_EID_PREP: | |
203 | elems->prep = pos; | |
204 | elems->prep_len = elen; | |
205 | break; | |
206 | case WLAN_EID_PERR: | |
207 | elems->perr = pos; | |
208 | elems->perr_len = elen; | |
209 | break; | |
f2df3859 AK |
210 | case WLAN_EID_CHANNEL_SWITCH: |
211 | elems->ch_switch_elem = pos; | |
212 | elems->ch_switch_elem_len = elen; | |
213 | break; | |
214 | case WLAN_EID_QUIET: | |
215 | if (!elems->quiet_elem) { | |
216 | elems->quiet_elem = pos; | |
217 | elems->quiet_elem_len = elen; | |
218 | } | |
219 | elems->num_of_quiet_elem++; | |
220 | break; | |
221 | case WLAN_EID_COUNTRY: | |
222 | elems->country_elem = pos; | |
223 | elems->country_elem_len = elen; | |
224 | break; | |
225 | case WLAN_EID_PWR_CONSTRAINT: | |
226 | elems->pwr_constr_elem = pos; | |
227 | elems->pwr_constr_elem_len = elen; | |
228 | break; | |
f0706e82 | 229 | default: |
f0706e82 JB |
230 | break; |
231 | } | |
232 | ||
233 | left -= elen; | |
234 | pos += elen; | |
235 | } | |
f0706e82 JB |
236 | } |
237 | ||
238 | ||
43ac2ca3 JM |
239 | static u8 * ieee80211_bss_get_ie(struct ieee80211_sta_bss *bss, u8 ie) |
240 | { | |
241 | u8 *end, *pos; | |
242 | ||
243 | pos = bss->ies; | |
244 | if (pos == NULL) | |
245 | return NULL; | |
246 | end = pos + bss->ies_len; | |
247 | ||
248 | while (pos + 1 < end) { | |
249 | if (pos + 2 + pos[1] > end) | |
250 | break; | |
251 | if (pos[0] == ie) | |
252 | return pos; | |
253 | pos += 2 + pos[1]; | |
254 | } | |
255 | ||
256 | return NULL; | |
257 | } | |
258 | ||
259 | ||
f0706e82 JB |
260 | static int ecw2cw(int ecw) |
261 | { | |
ac2bf324 | 262 | return (1 << ecw) - 1; |
f0706e82 JB |
263 | } |
264 | ||
e2839d8f | 265 | |
f698d856 | 266 | static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata, |
e2839d8f VK |
267 | struct ieee80211_sta_bss *bss, |
268 | int ibss) | |
269 | { | |
e2839d8f VK |
270 | struct ieee80211_local *local = sdata->local; |
271 | int i, have_higher_than_11mbit = 0; | |
272 | ||
273 | ||
274 | /* cf. IEEE 802.11 9.2.12 */ | |
275 | for (i = 0; i < bss->supp_rates_len; i++) | |
276 | if ((bss->supp_rates[i] & 0x7f) * 5 > 110) | |
277 | have_higher_than_11mbit = 1; | |
278 | ||
279 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
280 | have_higher_than_11mbit) | |
281 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
282 | else | |
283 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
284 | ||
285 | ||
286 | if (local->ops->conf_tx) { | |
287 | struct ieee80211_tx_queue_params qparam; | |
e2839d8f VK |
288 | |
289 | memset(&qparam, 0, sizeof(qparam)); | |
290 | ||
291 | qparam.aifs = 2; | |
292 | ||
293 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
294 | !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)) | |
295 | qparam.cw_min = 31; | |
296 | else | |
297 | qparam.cw_min = 15; | |
298 | ||
299 | qparam.cw_max = 1023; | |
300 | qparam.txop = 0; | |
301 | ||
e100bb64 JB |
302 | for (i = 0; i < local_to_hw(local)->queues; i++) |
303 | local->ops->conf_tx(local_to_hw(local), i, &qparam); | |
e2839d8f VK |
304 | } |
305 | } | |
306 | ||
f698d856 | 307 | static void ieee80211_sta_wmm_params(struct ieee80211_local *local, |
f0706e82 JB |
308 | struct ieee80211_if_sta *ifsta, |
309 | u8 *wmm_param, size_t wmm_param_len) | |
310 | { | |
f0706e82 JB |
311 | struct ieee80211_tx_queue_params params; |
312 | size_t left; | |
313 | int count; | |
314 | u8 *pos; | |
315 | ||
3434fbd3 JB |
316 | if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED)) |
317 | return; | |
318 | ||
319 | if (!wmm_param) | |
320 | return; | |
321 | ||
f0706e82 JB |
322 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) |
323 | return; | |
324 | count = wmm_param[6] & 0x0f; | |
325 | if (count == ifsta->wmm_last_param_set) | |
326 | return; | |
327 | ifsta->wmm_last_param_set = count; | |
328 | ||
329 | pos = wmm_param + 8; | |
330 | left = wmm_param_len - 8; | |
331 | ||
332 | memset(¶ms, 0, sizeof(params)); | |
333 | ||
334 | if (!local->ops->conf_tx) | |
335 | return; | |
336 | ||
337 | local->wmm_acm = 0; | |
338 | for (; left >= 4; left -= 4, pos += 4) { | |
339 | int aci = (pos[0] >> 5) & 0x03; | |
340 | int acm = (pos[0] >> 4) & 0x01; | |
341 | int queue; | |
342 | ||
343 | switch (aci) { | |
344 | case 1: | |
e100bb64 | 345 | queue = 3; |
988c0f72 | 346 | if (acm) |
f0706e82 | 347 | local->wmm_acm |= BIT(0) | BIT(3); |
f0706e82 JB |
348 | break; |
349 | case 2: | |
e100bb64 | 350 | queue = 1; |
988c0f72 | 351 | if (acm) |
f0706e82 | 352 | local->wmm_acm |= BIT(4) | BIT(5); |
f0706e82 JB |
353 | break; |
354 | case 3: | |
e100bb64 | 355 | queue = 0; |
988c0f72 | 356 | if (acm) |
f0706e82 | 357 | local->wmm_acm |= BIT(6) | BIT(7); |
f0706e82 JB |
358 | break; |
359 | case 0: | |
360 | default: | |
e100bb64 | 361 | queue = 2; |
988c0f72 | 362 | if (acm) |
f0706e82 | 363 | local->wmm_acm |= BIT(1) | BIT(2); |
f0706e82 JB |
364 | break; |
365 | } | |
366 | ||
367 | params.aifs = pos[0] & 0x0f; | |
368 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); | |
369 | params.cw_min = ecw2cw(pos[1] & 0x0f); | |
f434b2d1 | 370 | params.txop = get_unaligned_le16(pos + 2); |
f4ea83dd | 371 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
f0706e82 | 372 | printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d " |
3330d7be | 373 | "cWmin=%d cWmax=%d txop=%d\n", |
f698d856 | 374 | local->mdev->name, queue, aci, acm, params.aifs, params.cw_min, |
3330d7be JB |
375 | params.cw_max, params.txop); |
376 | #endif | |
f0706e82 JB |
377 | /* TODO: handle ACM (block TX, fallback to next lowest allowed |
378 | * AC for now) */ | |
379 | if (local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) { | |
380 | printk(KERN_DEBUG "%s: failed to set TX queue " | |
f698d856 | 381 | "parameters for queue %d\n", local->mdev->name, queue); |
f0706e82 JB |
382 | } |
383 | } | |
384 | } | |
385 | ||
50c4afb9 JL |
386 | static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata, |
387 | bool use_protection, | |
388 | bool use_short_preamble) | |
5628221c | 389 | { |
471b3efd | 390 | struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf; |
ebd74487 | 391 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
5628221c | 392 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
0795af57 | 393 | DECLARE_MAC_BUF(mac); |
ebd74487 | 394 | #endif |
471b3efd | 395 | u32 changed = 0; |
5628221c | 396 | |
471b3efd | 397 | if (use_protection != bss_conf->use_cts_prot) { |
f4ea83dd | 398 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
5628221c DD |
399 | if (net_ratelimit()) { |
400 | printk(KERN_DEBUG "%s: CTS protection %s (BSSID=" | |
0795af57 | 401 | "%s)\n", |
471b3efd | 402 | sdata->dev->name, |
5628221c | 403 | use_protection ? "enabled" : "disabled", |
0795af57 | 404 | print_mac(mac, ifsta->bssid)); |
5628221c | 405 | } |
f4ea83dd | 406 | #endif |
471b3efd JB |
407 | bss_conf->use_cts_prot = use_protection; |
408 | changed |= BSS_CHANGED_ERP_CTS_PROT; | |
5628221c | 409 | } |
7e9ed188 | 410 | |
d43c7b37 | 411 | if (use_short_preamble != bss_conf->use_short_preamble) { |
f4ea83dd | 412 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
7e9ed188 DD |
413 | if (net_ratelimit()) { |
414 | printk(KERN_DEBUG "%s: switched to %s barker preamble" | |
0795af57 | 415 | " (BSSID=%s)\n", |
471b3efd | 416 | sdata->dev->name, |
d43c7b37 | 417 | use_short_preamble ? "short" : "long", |
0795af57 | 418 | print_mac(mac, ifsta->bssid)); |
7e9ed188 | 419 | } |
f4ea83dd | 420 | #endif |
d43c7b37 | 421 | bss_conf->use_short_preamble = use_short_preamble; |
471b3efd | 422 | changed |= BSS_CHANGED_ERP_PREAMBLE; |
7e9ed188 | 423 | } |
d9430a32 | 424 | |
471b3efd | 425 | return changed; |
5628221c DD |
426 | } |
427 | ||
50c4afb9 JL |
428 | static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata, |
429 | u8 erp_value) | |
430 | { | |
431 | bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0; | |
432 | bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0; | |
433 | ||
434 | return ieee80211_handle_protect_preamb(sdata, | |
435 | use_protection, use_short_preamble); | |
436 | } | |
437 | ||
438 | static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, | |
439 | struct ieee80211_sta_bss *bss) | |
440 | { | |
441 | u32 changed = 0; | |
442 | ||
443 | if (bss->has_erp_value) | |
444 | changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value); | |
445 | else { | |
446 | u16 capab = bss->capability; | |
447 | changed |= ieee80211_handle_protect_preamb(sdata, false, | |
448 | (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0); | |
449 | } | |
450 | ||
451 | return changed; | |
452 | } | |
453 | ||
c7153508 RR |
454 | int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie, |
455 | struct ieee80211_ht_info *ht_info) | |
456 | { | |
457 | ||
458 | if (ht_info == NULL) | |
459 | return -EINVAL; | |
460 | ||
461 | memset(ht_info, 0, sizeof(*ht_info)); | |
462 | ||
463 | if (ht_cap_ie) { | |
464 | u8 ampdu_info = ht_cap_ie->ampdu_params_info; | |
465 | ||
466 | ht_info->ht_supported = 1; | |
467 | ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info); | |
468 | ht_info->ampdu_factor = | |
469 | ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR; | |
470 | ht_info->ampdu_density = | |
471 | (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2; | |
472 | memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16); | |
473 | } else | |
474 | ht_info->ht_supported = 0; | |
475 | ||
476 | return 0; | |
477 | } | |
478 | ||
479 | int ieee80211_ht_addt_info_ie_to_ht_bss_info( | |
480 | struct ieee80211_ht_addt_info *ht_add_info_ie, | |
481 | struct ieee80211_ht_bss_info *bss_info) | |
482 | { | |
483 | if (bss_info == NULL) | |
484 | return -EINVAL; | |
485 | ||
486 | memset(bss_info, 0, sizeof(*bss_info)); | |
487 | ||
488 | if (ht_add_info_ie) { | |
489 | u16 op_mode; | |
490 | op_mode = le16_to_cpu(ht_add_info_ie->operation_mode); | |
491 | ||
492 | bss_info->primary_channel = ht_add_info_ie->control_chan; | |
493 | bss_info->bss_cap = ht_add_info_ie->ht_param; | |
494 | bss_info->bss_op_mode = (u8)(op_mode & 0xff); | |
495 | } | |
496 | ||
497 | return 0; | |
498 | } | |
5628221c | 499 | |
f698d856 | 500 | static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
501 | struct ieee80211_if_sta *ifsta) |
502 | { | |
f0706e82 JB |
503 | union iwreq_data wrqu; |
504 | ||
f0706e82 | 505 | if (ifsta->assocreq_ies) { |
087d833e JM |
506 | memset(&wrqu, 0, sizeof(wrqu)); |
507 | wrqu.data.length = ifsta->assocreq_ies_len; | |
b171e19e | 508 | wireless_send_event(sdata->dev, IWEVASSOCREQIE, &wrqu, |
087d833e | 509 | ifsta->assocreq_ies); |
f0706e82 | 510 | } |
f0706e82 | 511 | |
087d833e JM |
512 | if (ifsta->assocresp_ies) { |
513 | memset(&wrqu, 0, sizeof(wrqu)); | |
514 | wrqu.data.length = ifsta->assocresp_ies_len; | |
b171e19e | 515 | wireless_send_event(sdata->dev, IWEVASSOCRESPIE, &wrqu, |
087d833e | 516 | ifsta->assocresp_ies); |
f0706e82 | 517 | } |
f0706e82 JB |
518 | } |
519 | ||
520 | ||
f698d856 | 521 | static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
d6f2da5b | 522 | struct ieee80211_if_sta *ifsta, |
47f0c502 | 523 | bool assoc) |
f0706e82 | 524 | { |
471b3efd | 525 | struct ieee80211_local *local = sdata->local; |
38668c05 | 526 | struct ieee80211_conf *conf = &local_to_hw(local)->conf; |
f0706e82 | 527 | union iwreq_data wrqu; |
471b3efd | 528 | u32 changed = BSS_CHANGED_ASSOC; |
f0706e82 | 529 | |
f0706e82 | 530 | if (assoc) { |
5628221c | 531 | struct ieee80211_sta_bss *bss; |
d6f2da5b JS |
532 | |
533 | ifsta->flags |= IEEE80211_STA_ASSOCIATED; | |
534 | ||
51fb61e7 | 535 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
f0706e82 | 536 | return; |
5628221c | 537 | |
f698d856 | 538 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
38668c05 | 539 | conf->channel->center_freq, |
cffdd30d | 540 | ifsta->ssid, ifsta->ssid_len); |
5628221c | 541 | if (bss) { |
21c0cbe7 TW |
542 | /* set timing information */ |
543 | sdata->bss_conf.beacon_int = bss->beacon_int; | |
544 | sdata->bss_conf.timestamp = bss->timestamp; | |
98f7dfd8 | 545 | sdata->bss_conf.dtim_period = bss->dtim_period; |
21c0cbe7 | 546 | |
50c4afb9 | 547 | changed |= ieee80211_handle_bss_capability(sdata, bss); |
21c0cbe7 | 548 | |
3e122be0 | 549 | ieee80211_rx_bss_put(local, bss); |
5628221c DD |
550 | } |
551 | ||
38668c05 TW |
552 | if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) { |
553 | changed |= BSS_CHANGED_HT; | |
554 | sdata->bss_conf.assoc_ht = 1; | |
555 | sdata->bss_conf.ht_conf = &conf->ht_conf; | |
556 | sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf; | |
557 | } | |
558 | ||
d6f2da5b | 559 | ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET; |
f0706e82 JB |
560 | memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN); |
561 | memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN); | |
f698d856 | 562 | ieee80211_sta_send_associnfo(sdata, ifsta); |
f0706e82 | 563 | } else { |
f698d856 JBG |
564 | netif_carrier_off(sdata->dev); |
565 | ieee80211_sta_tear_down_BA_sessions(sdata, ifsta->bssid); | |
d6f2da5b | 566 | ifsta->flags &= ~IEEE80211_STA_ASSOCIATED; |
f698d856 | 567 | changed |= ieee80211_reset_erp_info(sdata); |
38668c05 TW |
568 | |
569 | sdata->bss_conf.assoc_ht = 0; | |
570 | sdata->bss_conf.ht_conf = NULL; | |
571 | sdata->bss_conf.ht_bss_conf = NULL; | |
572 | ||
f0706e82 JB |
573 | memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN); |
574 | } | |
f0706e82 | 575 | ifsta->last_probe = jiffies; |
47f0c502 | 576 | ieee80211_led_assoc(local, assoc); |
471b3efd | 577 | |
b2205256 | 578 | sdata->bss_conf.assoc = assoc; |
471b3efd | 579 | ieee80211_bss_info_change_notify(sdata, changed); |
8db9369f GC |
580 | |
581 | if (assoc) | |
f698d856 | 582 | netif_carrier_on(sdata->dev); |
8db9369f | 583 | |
41a7be48 | 584 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; |
f698d856 | 585 | wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL); |
f0706e82 JB |
586 | } |
587 | ||
f698d856 | 588 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
589 | struct ieee80211_if_sta *ifsta, int deauth) |
590 | { | |
9859b81e RR |
591 | if (deauth) { |
592 | ifsta->direct_probe_tries = 0; | |
f0706e82 | 593 | ifsta->auth_tries = 0; |
9859b81e | 594 | } |
6042a3e3 | 595 | ifsta->assoc_scan_tries = 0; |
f0706e82 | 596 | ifsta->assoc_tries = 0; |
f698d856 | 597 | ieee80211_set_associated(sdata, ifsta, 0); |
f0706e82 JB |
598 | } |
599 | ||
f698d856 | 600 | void ieee80211_sta_tx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, |
ee385855 | 601 | int encrypt) |
f0706e82 | 602 | { |
f0706e82 JB |
603 | skb->dev = sdata->local->mdev; |
604 | skb_set_mac_header(skb, 0); | |
605 | skb_set_network_header(skb, 0); | |
606 | skb_set_transport_header(skb, 0); | |
607 | ||
d0f09804 JB |
608 | skb->iif = sdata->dev->ifindex; |
609 | skb->do_not_encrypt = !encrypt; | |
f0706e82 JB |
610 | |
611 | dev_queue_xmit(skb); | |
612 | } | |
613 | ||
614 | ||
f698d856 | 615 | static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
616 | struct ieee80211_if_sta *ifsta, |
617 | int transaction, u8 *extra, size_t extra_len, | |
618 | int encrypt) | |
619 | { | |
f698d856 | 620 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
621 | struct sk_buff *skb; |
622 | struct ieee80211_mgmt *mgmt; | |
623 | ||
624 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
625 | sizeof(*mgmt) + 6 + extra_len); | |
626 | if (!skb) { | |
627 | printk(KERN_DEBUG "%s: failed to allocate buffer for auth " | |
f698d856 | 628 | "frame\n", sdata->dev->name); |
f0706e82 JB |
629 | return; |
630 | } | |
631 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
632 | ||
633 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); | |
634 | memset(mgmt, 0, 24 + 6); | |
e7827a70 HH |
635 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
636 | IEEE80211_STYPE_AUTH); | |
f0706e82 JB |
637 | if (encrypt) |
638 | mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
639 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
f698d856 | 640 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
f0706e82 JB |
641 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); |
642 | mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg); | |
643 | mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); | |
644 | ifsta->auth_transaction = transaction + 1; | |
645 | mgmt->u.auth.status_code = cpu_to_le16(0); | |
646 | if (extra) | |
647 | memcpy(skb_put(skb, extra_len), extra, extra_len); | |
648 | ||
f698d856 | 649 | ieee80211_sta_tx(sdata, skb, encrypt); |
f0706e82 JB |
650 | } |
651 | ||
9859b81e RR |
652 | static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata, |
653 | struct ieee80211_if_sta *ifsta) | |
654 | { | |
655 | DECLARE_MAC_BUF(mac); | |
656 | ||
657 | ifsta->direct_probe_tries++; | |
658 | if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) { | |
659 | printk(KERN_DEBUG "%s: direct probe to AP %s timed out\n", | |
660 | sdata->dev->name, print_mac(mac, ifsta->bssid)); | |
661 | ifsta->state = IEEE80211_STA_MLME_DISABLED; | |
662 | return; | |
663 | } | |
664 | ||
665 | printk(KERN_DEBUG "%s: direct probe to AP %s try %d\n", | |
666 | sdata->dev->name, print_mac(mac, ifsta->bssid), | |
667 | ifsta->direct_probe_tries); | |
668 | ||
669 | ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE; | |
670 | ||
671 | set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request); | |
672 | ||
673 | /* Direct probe is sent to broadcast address as some APs | |
674 | * will not answer to direct packet in unassociated state. | |
675 | */ | |
676 | ieee80211_send_probe_req(sdata, NULL, | |
677 | ifsta->ssid, ifsta->ssid_len); | |
678 | ||
679 | mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT); | |
680 | } | |
681 | ||
f0706e82 | 682 | |
f698d856 | 683 | static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
684 | struct ieee80211_if_sta *ifsta) |
685 | { | |
0795af57 JP |
686 | DECLARE_MAC_BUF(mac); |
687 | ||
f0706e82 JB |
688 | ifsta->auth_tries++; |
689 | if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0795af57 | 690 | printk(KERN_DEBUG "%s: authentication with AP %s" |
f0706e82 | 691 | " timed out\n", |
f698d856 | 692 | sdata->dev->name, print_mac(mac, ifsta->bssid)); |
48c2fc59 | 693 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
f0706e82 JB |
694 | return; |
695 | } | |
696 | ||
48c2fc59 | 697 | ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE; |
0795af57 | 698 | printk(KERN_DEBUG "%s: authenticate with AP %s\n", |
f698d856 | 699 | sdata->dev->name, print_mac(mac, ifsta->bssid)); |
f0706e82 | 700 | |
f698d856 | 701 | ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0); |
f0706e82 JB |
702 | |
703 | mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT); | |
704 | } | |
705 | ||
36d16ae7 HS |
706 | static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss, |
707 | struct ieee80211_supported_band *sband, | |
708 | u64 *rates) | |
709 | { | |
710 | int i, j, count; | |
711 | *rates = 0; | |
712 | count = 0; | |
713 | for (i = 0; i < bss->supp_rates_len; i++) { | |
714 | int rate = (bss->supp_rates[i] & 0x7F) * 5; | |
715 | ||
716 | for (j = 0; j < sband->n_bitrates; j++) | |
717 | if (sband->bitrates[j].bitrate == rate) { | |
718 | *rates |= BIT(j); | |
719 | count++; | |
720 | break; | |
721 | } | |
722 | } | |
723 | ||
724 | return count; | |
725 | } | |
f0706e82 | 726 | |
f698d856 | 727 | static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
728 | struct ieee80211_if_sta *ifsta) |
729 | { | |
f698d856 | 730 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
731 | struct sk_buff *skb; |
732 | struct ieee80211_mgmt *mgmt; | |
43ac2ca3 | 733 | u8 *pos, *ies, *ht_add_ie; |
36d16ae7 | 734 | int i, len, count, rates_len, supp_rates_len; |
f0706e82 JB |
735 | u16 capab; |
736 | struct ieee80211_sta_bss *bss; | |
737 | int wmm = 0; | |
8318d78a | 738 | struct ieee80211_supported_band *sband; |
36d16ae7 | 739 | u64 rates = 0; |
f0706e82 JB |
740 | |
741 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
742 | sizeof(*mgmt) + 200 + ifsta->extra_ie_len + | |
743 | ifsta->ssid_len); | |
744 | if (!skb) { | |
745 | printk(KERN_DEBUG "%s: failed to allocate buffer for assoc " | |
f698d856 | 746 | "frame\n", sdata->dev->name); |
f0706e82 JB |
747 | return; |
748 | } | |
749 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
750 | ||
8318d78a JB |
751 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
752 | ||
f0706e82 | 753 | capab = ifsta->capab; |
8318d78a JB |
754 | |
755 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) { | |
756 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) | |
757 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; | |
758 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) | |
759 | capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; | |
f0706e82 | 760 | } |
8318d78a | 761 | |
f698d856 | 762 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
8318d78a | 763 | local->hw.conf.channel->center_freq, |
cffdd30d | 764 | ifsta->ssid, ifsta->ssid_len); |
f0706e82 JB |
765 | if (bss) { |
766 | if (bss->capability & WLAN_CAPABILITY_PRIVACY) | |
767 | capab |= WLAN_CAPABILITY_PRIVACY; | |
43ac2ca3 | 768 | if (bss->wmm_used) |
f0706e82 | 769 | wmm = 1; |
0d580a77 HS |
770 | |
771 | /* get all rates supported by the device and the AP as | |
772 | * some APs don't like getting a superset of their rates | |
773 | * in the association request (e.g. D-Link DAP 1353 in | |
774 | * b-only mode) */ | |
775 | rates_len = ieee80211_compatible_rates(bss, sband, &rates); | |
776 | ||
06ff47bc TW |
777 | if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && |
778 | (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)) | |
779 | capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; | |
780 | ||
3e122be0 | 781 | ieee80211_rx_bss_put(local, bss); |
0d580a77 HS |
782 | } else { |
783 | rates = ~0; | |
784 | rates_len = sband->n_bitrates; | |
f0706e82 JB |
785 | } |
786 | ||
787 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
788 | memset(mgmt, 0, 24); | |
789 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
f698d856 | 790 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
f0706e82 JB |
791 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); |
792 | ||
d6f2da5b | 793 | if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) { |
f0706e82 | 794 | skb_put(skb, 10); |
e7827a70 HH |
795 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
796 | IEEE80211_STYPE_REASSOC_REQ); | |
f0706e82 | 797 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); |
ea95bba4 TW |
798 | mgmt->u.reassoc_req.listen_interval = |
799 | cpu_to_le16(local->hw.conf.listen_interval); | |
f0706e82 JB |
800 | memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid, |
801 | ETH_ALEN); | |
802 | } else { | |
803 | skb_put(skb, 4); | |
e7827a70 HH |
804 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
805 | IEEE80211_STYPE_ASSOC_REQ); | |
f0706e82 | 806 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); |
ea95bba4 TW |
807 | mgmt->u.reassoc_req.listen_interval = |
808 | cpu_to_le16(local->hw.conf.listen_interval); | |
f0706e82 JB |
809 | } |
810 | ||
811 | /* SSID */ | |
812 | ies = pos = skb_put(skb, 2 + ifsta->ssid_len); | |
813 | *pos++ = WLAN_EID_SSID; | |
814 | *pos++ = ifsta->ssid_len; | |
815 | memcpy(pos, ifsta->ssid, ifsta->ssid_len); | |
816 | ||
0d580a77 | 817 | /* add all rates which were marked to be used above */ |
36d16ae7 HS |
818 | supp_rates_len = rates_len; |
819 | if (supp_rates_len > 8) | |
820 | supp_rates_len = 8; | |
821 | ||
8318d78a | 822 | len = sband->n_bitrates; |
36d16ae7 | 823 | pos = skb_put(skb, supp_rates_len + 2); |
f0706e82 | 824 | *pos++ = WLAN_EID_SUPP_RATES; |
36d16ae7 | 825 | *pos++ = supp_rates_len; |
f0706e82 | 826 | |
36d16ae7 HS |
827 | count = 0; |
828 | for (i = 0; i < sband->n_bitrates; i++) { | |
829 | if (BIT(i) & rates) { | |
8318d78a | 830 | int rate = sband->bitrates[i].bitrate; |
f0706e82 | 831 | *pos++ = (u8) (rate / 5); |
36d16ae7 HS |
832 | if (++count == 8) |
833 | break; | |
834 | } | |
835 | } | |
836 | ||
8ab65b03 | 837 | if (rates_len > count) { |
36d16ae7 HS |
838 | pos = skb_put(skb, rates_len - count + 2); |
839 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
840 | *pos++ = rates_len - count; | |
841 | ||
842 | for (i++; i < sband->n_bitrates; i++) { | |
843 | if (BIT(i) & rates) { | |
844 | int rate = sband->bitrates[i].bitrate; | |
845 | *pos++ = (u8) (rate / 5); | |
846 | } | |
f0706e82 JB |
847 | } |
848 | } | |
849 | ||
06ff47bc TW |
850 | if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { |
851 | /* 1. power capabilities */ | |
852 | pos = skb_put(skb, 4); | |
853 | *pos++ = WLAN_EID_PWR_CAPABILITY; | |
854 | *pos++ = 2; | |
855 | *pos++ = 0; /* min tx power */ | |
856 | *pos++ = local->hw.conf.channel->max_power; /* max tx power */ | |
857 | ||
858 | /* 2. supported channels */ | |
859 | /* TODO: get this in reg domain format */ | |
860 | pos = skb_put(skb, 2 * sband->n_channels + 2); | |
861 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; | |
862 | *pos++ = 2 * sband->n_channels; | |
863 | for (i = 0; i < sband->n_channels; i++) { | |
864 | *pos++ = ieee80211_frequency_to_channel( | |
865 | sband->channels[i].center_freq); | |
866 | *pos++ = 1; /* one channel in the subband*/ | |
867 | } | |
868 | } | |
869 | ||
f0706e82 JB |
870 | if (ifsta->extra_ie) { |
871 | pos = skb_put(skb, ifsta->extra_ie_len); | |
872 | memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len); | |
873 | } | |
874 | ||
d6f2da5b | 875 | if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) { |
f0706e82 JB |
876 | pos = skb_put(skb, 9); |
877 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
878 | *pos++ = 7; /* len */ | |
879 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ | |
880 | *pos++ = 0x50; | |
881 | *pos++ = 0xf2; | |
882 | *pos++ = 2; /* WME */ | |
883 | *pos++ = 0; /* WME info */ | |
884 | *pos++ = 1; /* WME ver */ | |
885 | *pos++ = 0; | |
886 | } | |
3434fbd3 | 887 | |
c7153508 | 888 | /* wmm support is a must to HT */ |
3434fbd3 | 889 | if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) && |
43ac2ca3 JM |
890 | sband->ht_info.ht_supported && |
891 | (ht_add_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_EXTRA_INFO))) { | |
9306102e | 892 | struct ieee80211_ht_addt_info *ht_add_info = |
43ac2ca3 | 893 | (struct ieee80211_ht_addt_info *)ht_add_ie; |
9306102e EG |
894 | u16 cap = sband->ht_info.cap; |
895 | __le16 tmp; | |
896 | u32 flags = local->hw.conf.channel->flags; | |
897 | ||
898 | switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) { | |
899 | case IEEE80211_HT_IE_CHA_SEC_ABOVE: | |
900 | if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) { | |
901 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH; | |
902 | cap &= ~IEEE80211_HT_CAP_SGI_40; | |
903 | } | |
904 | break; | |
905 | case IEEE80211_HT_IE_CHA_SEC_BELOW: | |
906 | if (flags & IEEE80211_CHAN_NO_FAT_BELOW) { | |
907 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH; | |
908 | cap &= ~IEEE80211_HT_CAP_SGI_40; | |
909 | } | |
910 | break; | |
911 | } | |
912 | ||
913 | tmp = cpu_to_le16(cap); | |
c7153508 RR |
914 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2); |
915 | *pos++ = WLAN_EID_HT_CAPABILITY; | |
916 | *pos++ = sizeof(struct ieee80211_ht_cap); | |
917 | memset(pos, 0, sizeof(struct ieee80211_ht_cap)); | |
918 | memcpy(pos, &tmp, sizeof(u16)); | |
919 | pos += sizeof(u16); | |
8318d78a JB |
920 | /* TODO: needs a define here for << 2 */ |
921 | *pos++ = sband->ht_info.ampdu_factor | | |
922 | (sband->ht_info.ampdu_density << 2); | |
923 | memcpy(pos, sband->ht_info.supp_mcs_set, 16); | |
c7153508 | 924 | } |
f0706e82 JB |
925 | |
926 | kfree(ifsta->assocreq_ies); | |
927 | ifsta->assocreq_ies_len = (skb->data + skb->len) - ies; | |
0ec0b7ac | 928 | ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL); |
f0706e82 JB |
929 | if (ifsta->assocreq_ies) |
930 | memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len); | |
931 | ||
f698d856 | 932 | ieee80211_sta_tx(sdata, skb, 0); |
f0706e82 JB |
933 | } |
934 | ||
935 | ||
f698d856 | 936 | static void ieee80211_send_deauth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
937 | struct ieee80211_if_sta *ifsta, u16 reason) |
938 | { | |
f698d856 | 939 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
940 | struct sk_buff *skb; |
941 | struct ieee80211_mgmt *mgmt; | |
942 | ||
943 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); | |
944 | if (!skb) { | |
945 | printk(KERN_DEBUG "%s: failed to allocate buffer for deauth " | |
f698d856 | 946 | "frame\n", sdata->dev->name); |
f0706e82 JB |
947 | return; |
948 | } | |
949 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
950 | ||
951 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
952 | memset(mgmt, 0, 24); | |
953 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
f698d856 | 954 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
f0706e82 | 955 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); |
e7827a70 HH |
956 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
957 | IEEE80211_STYPE_DEAUTH); | |
f0706e82 JB |
958 | skb_put(skb, 2); |
959 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); | |
960 | ||
f698d856 | 961 | ieee80211_sta_tx(sdata, skb, 0); |
f0706e82 JB |
962 | } |
963 | ||
964 | ||
f698d856 | 965 | static void ieee80211_send_disassoc(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
966 | struct ieee80211_if_sta *ifsta, u16 reason) |
967 | { | |
f698d856 | 968 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
969 | struct sk_buff *skb; |
970 | struct ieee80211_mgmt *mgmt; | |
971 | ||
972 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); | |
973 | if (!skb) { | |
974 | printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc " | |
f698d856 | 975 | "frame\n", sdata->dev->name); |
f0706e82 JB |
976 | return; |
977 | } | |
978 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
979 | ||
980 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
981 | memset(mgmt, 0, 24); | |
982 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
f698d856 | 983 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
f0706e82 | 984 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); |
e7827a70 HH |
985 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
986 | IEEE80211_STYPE_DISASSOC); | |
f0706e82 JB |
987 | skb_put(skb, 2); |
988 | mgmt->u.disassoc.reason_code = cpu_to_le16(reason); | |
989 | ||
f698d856 | 990 | ieee80211_sta_tx(sdata, skb, 0); |
f0706e82 JB |
991 | } |
992 | ||
993 | ||
f698d856 | 994 | static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
995 | struct ieee80211_if_sta *ifsta) |
996 | { | |
f698d856 | 997 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 998 | struct ieee80211_sta_bss *bss; |
5b98b1f7 JB |
999 | int bss_privacy; |
1000 | int wep_privacy; | |
1001 | int privacy_invoked; | |
f0706e82 | 1002 | |
5b98b1f7 | 1003 | if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL)) |
f0706e82 JB |
1004 | return 0; |
1005 | ||
f698d856 | 1006 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
8318d78a | 1007 | local->hw.conf.channel->center_freq, |
cffdd30d | 1008 | ifsta->ssid, ifsta->ssid_len); |
f0706e82 JB |
1009 | if (!bss) |
1010 | return 0; | |
1011 | ||
5b98b1f7 | 1012 | bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY); |
f698d856 | 1013 | wep_privacy = !!ieee80211_sta_wep_configured(sdata); |
5b98b1f7 | 1014 | privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED); |
f0706e82 | 1015 | |
3e122be0 | 1016 | ieee80211_rx_bss_put(local, bss); |
f0706e82 | 1017 | |
5b98b1f7 JB |
1018 | if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked)) |
1019 | return 0; | |
1020 | ||
1021 | return 1; | |
f0706e82 JB |
1022 | } |
1023 | ||
1024 | ||
f698d856 | 1025 | static void ieee80211_associate(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1026 | struct ieee80211_if_sta *ifsta) |
1027 | { | |
0795af57 JP |
1028 | DECLARE_MAC_BUF(mac); |
1029 | ||
f0706e82 JB |
1030 | ifsta->assoc_tries++; |
1031 | if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) { | |
0795af57 | 1032 | printk(KERN_DEBUG "%s: association with AP %s" |
f0706e82 | 1033 | " timed out\n", |
f698d856 | 1034 | sdata->dev->name, print_mac(mac, ifsta->bssid)); |
48c2fc59 | 1035 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
f0706e82 JB |
1036 | return; |
1037 | } | |
1038 | ||
48c2fc59 | 1039 | ifsta->state = IEEE80211_STA_MLME_ASSOCIATE; |
0795af57 | 1040 | printk(KERN_DEBUG "%s: associate with AP %s\n", |
f698d856 JBG |
1041 | sdata->dev->name, print_mac(mac, ifsta->bssid)); |
1042 | if (ieee80211_privacy_mismatch(sdata, ifsta)) { | |
f0706e82 | 1043 | printk(KERN_DEBUG "%s: mismatch in privacy configuration and " |
f698d856 | 1044 | "mixed-cell disabled - abort association\n", sdata->dev->name); |
48c2fc59 | 1045 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
f0706e82 JB |
1046 | return; |
1047 | } | |
1048 | ||
f698d856 | 1049 | ieee80211_send_assoc(sdata, ifsta); |
f0706e82 JB |
1050 | |
1051 | mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT); | |
1052 | } | |
1053 | ||
1054 | ||
f698d856 | 1055 | static void ieee80211_associated(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1056 | struct ieee80211_if_sta *ifsta) |
1057 | { | |
f698d856 | 1058 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1059 | struct sta_info *sta; |
1060 | int disassoc; | |
0795af57 | 1061 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
1062 | |
1063 | /* TODO: start monitoring current AP signal quality and number of | |
1064 | * missed beacons. Scan other channels every now and then and search | |
1065 | * for better APs. */ | |
1066 | /* TODO: remove expired BSSes */ | |
1067 | ||
48c2fc59 | 1068 | ifsta->state = IEEE80211_STA_MLME_ASSOCIATED; |
f0706e82 | 1069 | |
d0709a65 JB |
1070 | rcu_read_lock(); |
1071 | ||
f0706e82 JB |
1072 | sta = sta_info_get(local, ifsta->bssid); |
1073 | if (!sta) { | |
0795af57 | 1074 | printk(KERN_DEBUG "%s: No STA entry for own AP %s\n", |
f698d856 | 1075 | sdata->dev->name, print_mac(mac, ifsta->bssid)); |
f0706e82 JB |
1076 | disassoc = 1; |
1077 | } else { | |
1078 | disassoc = 0; | |
1079 | if (time_after(jiffies, | |
1080 | sta->last_rx + IEEE80211_MONITORING_INTERVAL)) { | |
d6f2da5b | 1081 | if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) { |
f0706e82 | 1082 | printk(KERN_DEBUG "%s: No ProbeResp from " |
0795af57 | 1083 | "current AP %s - assume out of " |
f0706e82 | 1084 | "range\n", |
f698d856 | 1085 | sdata->dev->name, print_mac(mac, ifsta->bssid)); |
f0706e82 | 1086 | disassoc = 1; |
d0709a65 | 1087 | sta_info_unlink(&sta); |
d6f2da5b | 1088 | } else |
f698d856 | 1089 | ieee80211_send_probe_req(sdata, ifsta->bssid, |
f0706e82 JB |
1090 | local->scan_ssid, |
1091 | local->scan_ssid_len); | |
d6f2da5b | 1092 | ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL; |
f0706e82 | 1093 | } else { |
d6f2da5b | 1094 | ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL; |
f0706e82 JB |
1095 | if (time_after(jiffies, ifsta->last_probe + |
1096 | IEEE80211_PROBE_INTERVAL)) { | |
1097 | ifsta->last_probe = jiffies; | |
f698d856 | 1098 | ieee80211_send_probe_req(sdata, ifsta->bssid, |
f0706e82 JB |
1099 | ifsta->ssid, |
1100 | ifsta->ssid_len); | |
1101 | } | |
1102 | } | |
f0706e82 | 1103 | } |
d0709a65 JB |
1104 | |
1105 | rcu_read_unlock(); | |
1106 | ||
3b96766f | 1107 | if (disassoc && sta) |
d0709a65 | 1108 | sta_info_destroy(sta); |
d0709a65 | 1109 | |
f0706e82 | 1110 | if (disassoc) { |
48c2fc59 | 1111 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
f698d856 | 1112 | ieee80211_set_associated(sdata, ifsta, 0); |
f0706e82 JB |
1113 | } else { |
1114 | mod_timer(&ifsta->timer, jiffies + | |
1115 | IEEE80211_MONITORING_INTERVAL); | |
1116 | } | |
1117 | } | |
1118 | ||
1119 | ||
f698d856 | 1120 | static void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst, |
f0706e82 JB |
1121 | u8 *ssid, size_t ssid_len) |
1122 | { | |
f698d856 | 1123 | struct ieee80211_local *local = sdata->local; |
8318d78a | 1124 | struct ieee80211_supported_band *sband; |
f0706e82 JB |
1125 | struct sk_buff *skb; |
1126 | struct ieee80211_mgmt *mgmt; | |
1127 | u8 *pos, *supp_rates, *esupp_rates = NULL; | |
1128 | int i; | |
1129 | ||
1130 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200); | |
1131 | if (!skb) { | |
1132 | printk(KERN_DEBUG "%s: failed to allocate buffer for probe " | |
f698d856 | 1133 | "request\n", sdata->dev->name); |
f0706e82 JB |
1134 | return; |
1135 | } | |
1136 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1137 | ||
1138 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
1139 | memset(mgmt, 0, 24); | |
e7827a70 HH |
1140 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
1141 | IEEE80211_STYPE_PROBE_REQ); | |
f698d856 | 1142 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
f0706e82 JB |
1143 | if (dst) { |
1144 | memcpy(mgmt->da, dst, ETH_ALEN); | |
1145 | memcpy(mgmt->bssid, dst, ETH_ALEN); | |
1146 | } else { | |
1147 | memset(mgmt->da, 0xff, ETH_ALEN); | |
1148 | memset(mgmt->bssid, 0xff, ETH_ALEN); | |
1149 | } | |
1150 | pos = skb_put(skb, 2 + ssid_len); | |
1151 | *pos++ = WLAN_EID_SSID; | |
1152 | *pos++ = ssid_len; | |
1153 | memcpy(pos, ssid, ssid_len); | |
1154 | ||
1155 | supp_rates = skb_put(skb, 2); | |
1156 | supp_rates[0] = WLAN_EID_SUPP_RATES; | |
1157 | supp_rates[1] = 0; | |
8318d78a JB |
1158 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
1159 | ||
1160 | for (i = 0; i < sband->n_bitrates; i++) { | |
1161 | struct ieee80211_rate *rate = &sband->bitrates[i]; | |
f0706e82 JB |
1162 | if (esupp_rates) { |
1163 | pos = skb_put(skb, 1); | |
1164 | esupp_rates[1]++; | |
1165 | } else if (supp_rates[1] == 8) { | |
1166 | esupp_rates = skb_put(skb, 3); | |
1167 | esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES; | |
1168 | esupp_rates[1] = 1; | |
1169 | pos = &esupp_rates[2]; | |
1170 | } else { | |
1171 | pos = skb_put(skb, 1); | |
1172 | supp_rates[1]++; | |
1173 | } | |
8318d78a | 1174 | *pos = rate->bitrate / 5; |
f0706e82 JB |
1175 | } |
1176 | ||
f698d856 | 1177 | ieee80211_sta_tx(sdata, skb, 0); |
f0706e82 JB |
1178 | } |
1179 | ||
1180 | ||
f698d856 | 1181 | static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1182 | { |
f0706e82 | 1183 | if (!sdata || !sdata->default_key || |
8f20fc24 | 1184 | sdata->default_key->conf.alg != ALG_WEP) |
f0706e82 JB |
1185 | return 0; |
1186 | return 1; | |
1187 | } | |
1188 | ||
1189 | ||
f698d856 | 1190 | static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1191 | struct ieee80211_if_sta *ifsta) |
1192 | { | |
f698d856 | 1193 | printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name); |
d6f2da5b | 1194 | ifsta->flags |= IEEE80211_STA_AUTHENTICATED; |
f698d856 | 1195 | ieee80211_associate(sdata, ifsta); |
f0706e82 JB |
1196 | } |
1197 | ||
1198 | ||
f698d856 | 1199 | static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1200 | struct ieee80211_if_sta *ifsta, |
1201 | struct ieee80211_mgmt *mgmt, | |
1202 | size_t len) | |
1203 | { | |
1204 | u8 *pos; | |
1205 | struct ieee802_11_elems elems; | |
1206 | ||
f0706e82 | 1207 | pos = mgmt->u.auth.variable; |
67a4cce4 | 1208 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
f4ea83dd | 1209 | if (!elems.challenge) |
f0706e82 | 1210 | return; |
f698d856 | 1211 | ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2, |
f0706e82 JB |
1212 | elems.challenge_len + 2, 1); |
1213 | } | |
1214 | ||
f698d856 | 1215 | static void ieee80211_send_addba_resp(struct ieee80211_sub_if_data *sdata, u8 *da, u16 tid, |
9f985b0e RR |
1216 | u8 dialog_token, u16 status, u16 policy, |
1217 | u16 buf_size, u16 timeout) | |
1218 | { | |
9f985b0e | 1219 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
f698d856 | 1220 | struct ieee80211_local *local = sdata->local; |
9f985b0e RR |
1221 | struct sk_buff *skb; |
1222 | struct ieee80211_mgmt *mgmt; | |
1223 | u16 capab; | |
1224 | ||
3acea5b6 EK |
1225 | skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom); |
1226 | ||
9f985b0e RR |
1227 | if (!skb) { |
1228 | printk(KERN_DEBUG "%s: failed to allocate buffer " | |
f698d856 | 1229 | "for addba resp frame\n", sdata->dev->name); |
9f985b0e RR |
1230 | return; |
1231 | } | |
1232 | ||
1233 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1234 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
1235 | memset(mgmt, 0, 24); | |
1236 | memcpy(mgmt->da, da, ETH_ALEN); | |
f698d856 | 1237 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
51fb61e7 | 1238 | if (sdata->vif.type == IEEE80211_IF_TYPE_AP) |
f698d856 | 1239 | memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN); |
9f985b0e RR |
1240 | else |
1241 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
e7827a70 HH |
1242 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
1243 | IEEE80211_STYPE_ACTION); | |
9f985b0e RR |
1244 | |
1245 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp)); | |
1246 | mgmt->u.action.category = WLAN_CATEGORY_BACK; | |
1247 | mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP; | |
1248 | mgmt->u.action.u.addba_resp.dialog_token = dialog_token; | |
1249 | ||
1250 | capab = (u16)(policy << 1); /* bit 1 aggregation policy */ | |
1251 | capab |= (u16)(tid << 2); /* bit 5:2 TID number */ | |
1252 | capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */ | |
1253 | ||
1254 | mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab); | |
1255 | mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout); | |
1256 | mgmt->u.action.u.addba_resp.status = cpu_to_le16(status); | |
1257 | ||
f698d856 | 1258 | ieee80211_sta_tx(sdata, skb, 0); |
9f985b0e RR |
1259 | |
1260 | return; | |
1261 | } | |
1262 | ||
f698d856 | 1263 | void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata, const u8 *da, |
eadc8d9e RR |
1264 | u16 tid, u8 dialog_token, u16 start_seq_num, |
1265 | u16 agg_size, u16 timeout) | |
1266 | { | |
f698d856 | 1267 | struct ieee80211_local *local = sdata->local; |
eadc8d9e RR |
1268 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
1269 | struct sk_buff *skb; | |
1270 | struct ieee80211_mgmt *mgmt; | |
1271 | u16 capab; | |
1272 | ||
3acea5b6 | 1273 | skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom); |
eadc8d9e RR |
1274 | |
1275 | if (!skb) { | |
1276 | printk(KERN_ERR "%s: failed to allocate buffer " | |
f698d856 | 1277 | "for addba request frame\n", sdata->dev->name); |
eadc8d9e RR |
1278 | return; |
1279 | } | |
1280 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1281 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
1282 | memset(mgmt, 0, 24); | |
1283 | memcpy(mgmt->da, da, ETH_ALEN); | |
f698d856 | 1284 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
eadc8d9e | 1285 | if (sdata->vif.type == IEEE80211_IF_TYPE_AP) |
f698d856 | 1286 | memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN); |
eadc8d9e RR |
1287 | else |
1288 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
1289 | ||
e7827a70 HH |
1290 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
1291 | IEEE80211_STYPE_ACTION); | |
eadc8d9e RR |
1292 | |
1293 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req)); | |
1294 | ||
1295 | mgmt->u.action.category = WLAN_CATEGORY_BACK; | |
1296 | mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ; | |
1297 | ||
1298 | mgmt->u.action.u.addba_req.dialog_token = dialog_token; | |
1299 | capab = (u16)(1 << 1); /* bit 1 aggregation policy */ | |
1300 | capab |= (u16)(tid << 2); /* bit 5:2 TID number */ | |
1301 | capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */ | |
1302 | ||
1303 | mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab); | |
1304 | ||
1305 | mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout); | |
1306 | mgmt->u.action.u.addba_req.start_seq_num = | |
1307 | cpu_to_le16(start_seq_num << 4); | |
1308 | ||
f698d856 | 1309 | ieee80211_sta_tx(sdata, skb, 0); |
eadc8d9e RR |
1310 | } |
1311 | ||
f698d856 | 1312 | static void ieee80211_sta_process_addba_request(struct ieee80211_local *local, |
9f985b0e RR |
1313 | struct ieee80211_mgmt *mgmt, |
1314 | size_t len) | |
1315 | { | |
07db2183 RR |
1316 | struct ieee80211_hw *hw = &local->hw; |
1317 | struct ieee80211_conf *conf = &hw->conf; | |
9f985b0e | 1318 | struct sta_info *sta; |
07db2183 RR |
1319 | struct tid_ampdu_rx *tid_agg_rx; |
1320 | u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status; | |
9f985b0e | 1321 | u8 dialog_token; |
07db2183 RR |
1322 | int ret = -EOPNOTSUPP; |
1323 | DECLARE_MAC_BUF(mac); | |
9f985b0e | 1324 | |
d0709a65 JB |
1325 | rcu_read_lock(); |
1326 | ||
9f985b0e | 1327 | sta = sta_info_get(local, mgmt->sa); |
d0709a65 JB |
1328 | if (!sta) { |
1329 | rcu_read_unlock(); | |
9f985b0e | 1330 | return; |
d0709a65 | 1331 | } |
9f985b0e RR |
1332 | |
1333 | /* extract session parameters from addba request frame */ | |
1334 | dialog_token = mgmt->u.action.u.addba_req.dialog_token; | |
1335 | timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout); | |
07db2183 RR |
1336 | start_seq_num = |
1337 | le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4; | |
9f985b0e RR |
1338 | |
1339 | capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab); | |
1340 | ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1; | |
1341 | tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2; | |
1342 | buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6; | |
1343 | ||
9f985b0e RR |
1344 | status = WLAN_STATUS_REQUEST_DECLINED; |
1345 | ||
07db2183 RR |
1346 | /* sanity check for incoming parameters: |
1347 | * check if configuration can support the BA policy | |
1348 | * and if buffer size does not exceeds max value */ | |
1349 | if (((ba_policy != 1) | |
1350 | && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA))) | |
1351 | || (buf_size > IEEE80211_MAX_AMPDU_BUF)) { | |
1352 | status = WLAN_STATUS_INVALID_QOS_PARAM; | |
1353 | #ifdef CONFIG_MAC80211_HT_DEBUG | |
1354 | if (net_ratelimit()) | |
7b9d44cd | 1355 | printk(KERN_DEBUG "AddBA Req with bad params from " |
07db2183 RR |
1356 | "%s on tid %u. policy %d, buffer size %d\n", |
1357 | print_mac(mac, mgmt->sa), tid, ba_policy, | |
1358 | buf_size); | |
1359 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1360 | goto end_no_lock; | |
1361 | } | |
1362 | /* determine default buffer size */ | |
1363 | if (buf_size == 0) { | |
8318d78a JB |
1364 | struct ieee80211_supported_band *sband; |
1365 | ||
1366 | sband = local->hw.wiphy->bands[conf->channel->band]; | |
07db2183 | 1367 | buf_size = IEEE80211_MIN_AMPDU_BUF; |
8318d78a | 1368 | buf_size = buf_size << sband->ht_info.ampdu_factor; |
07db2183 RR |
1369 | } |
1370 | ||
07db2183 RR |
1371 | |
1372 | /* examine state machine */ | |
07346f81 | 1373 | spin_lock_bh(&sta->lock); |
07db2183 | 1374 | |
cee24a3e | 1375 | if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) { |
07db2183 RR |
1376 | #ifdef CONFIG_MAC80211_HT_DEBUG |
1377 | if (net_ratelimit()) | |
7b9d44cd | 1378 | printk(KERN_DEBUG "unexpected AddBA Req from " |
07db2183 RR |
1379 | "%s on tid %u\n", |
1380 | print_mac(mac, mgmt->sa), tid); | |
1381 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1382 | goto end; | |
1383 | } | |
1384 | ||
cee24a3e RR |
1385 | /* prepare A-MPDU MLME for Rx aggregation */ |
1386 | sta->ampdu_mlme.tid_rx[tid] = | |
1387 | kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC); | |
1388 | if (!sta->ampdu_mlme.tid_rx[tid]) { | |
f4ea83dd | 1389 | #ifdef CONFIG_MAC80211_HT_DEBUG |
cee24a3e RR |
1390 | if (net_ratelimit()) |
1391 | printk(KERN_ERR "allocate rx mlme to tid %d failed\n", | |
1392 | tid); | |
f4ea83dd | 1393 | #endif |
cee24a3e RR |
1394 | goto end; |
1395 | } | |
1396 | /* rx timer */ | |
1397 | sta->ampdu_mlme.tid_rx[tid]->session_timer.function = | |
1398 | sta_rx_agg_session_timer_expired; | |
1399 | sta->ampdu_mlme.tid_rx[tid]->session_timer.data = | |
1400 | (unsigned long)&sta->timer_to_tid[tid]; | |
1401 | init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer); | |
1402 | ||
1403 | tid_agg_rx = sta->ampdu_mlme.tid_rx[tid]; | |
1404 | ||
07db2183 RR |
1405 | /* prepare reordering buffer */ |
1406 | tid_agg_rx->reorder_buf = | |
c97c23e3 | 1407 | kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC); |
03147dfc | 1408 | if (!tid_agg_rx->reorder_buf) { |
f4ea83dd | 1409 | #ifdef CONFIG_MAC80211_HT_DEBUG |
03147dfc JB |
1410 | if (net_ratelimit()) |
1411 | printk(KERN_ERR "can not allocate reordering buffer " | |
1412 | "to tid %d\n", tid); | |
f4ea83dd | 1413 | #endif |
cee24a3e | 1414 | kfree(sta->ampdu_mlme.tid_rx[tid]); |
07db2183 RR |
1415 | goto end; |
1416 | } | |
1417 | memset(tid_agg_rx->reorder_buf, 0, | |
c97c23e3 | 1418 | buf_size * sizeof(struct sk_buff *)); |
07db2183 RR |
1419 | |
1420 | if (local->ops->ampdu_action) | |
1421 | ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START, | |
0df3ef45 | 1422 | sta->addr, tid, &start_seq_num); |
07db2183 | 1423 | #ifdef CONFIG_MAC80211_HT_DEBUG |
513a1025 | 1424 | printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret); |
07db2183 RR |
1425 | #endif /* CONFIG_MAC80211_HT_DEBUG */ |
1426 | ||
1427 | if (ret) { | |
1428 | kfree(tid_agg_rx->reorder_buf); | |
cee24a3e RR |
1429 | kfree(tid_agg_rx); |
1430 | sta->ampdu_mlme.tid_rx[tid] = NULL; | |
07db2183 RR |
1431 | goto end; |
1432 | } | |
1433 | ||
1434 | /* change state and send addba resp */ | |
cee24a3e | 1435 | sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL; |
07db2183 RR |
1436 | tid_agg_rx->dialog_token = dialog_token; |
1437 | tid_agg_rx->ssn = start_seq_num; | |
1438 | tid_agg_rx->head_seq_num = start_seq_num; | |
1439 | tid_agg_rx->buf_size = buf_size; | |
1440 | tid_agg_rx->timeout = timeout; | |
1441 | tid_agg_rx->stored_mpdu_num = 0; | |
1442 | status = WLAN_STATUS_SUCCESS; | |
1443 | end: | |
07346f81 | 1444 | spin_unlock_bh(&sta->lock); |
07db2183 RR |
1445 | |
1446 | end_no_lock: | |
f698d856 | 1447 | ieee80211_send_addba_resp(sta->sdata, sta->addr, tid, |
d0709a65 JB |
1448 | dialog_token, status, 1, buf_size, timeout); |
1449 | rcu_read_unlock(); | |
9f985b0e | 1450 | } |
f0706e82 | 1451 | |
f698d856 | 1452 | static void ieee80211_sta_process_addba_resp(struct ieee80211_local *local, |
eadc8d9e RR |
1453 | struct ieee80211_mgmt *mgmt, |
1454 | size_t len) | |
1455 | { | |
eadc8d9e RR |
1456 | struct ieee80211_hw *hw = &local->hw; |
1457 | struct sta_info *sta; | |
1458 | u16 capab; | |
1459 | u16 tid; | |
1460 | u8 *state; | |
1461 | ||
d0709a65 JB |
1462 | rcu_read_lock(); |
1463 | ||
eadc8d9e | 1464 | sta = sta_info_get(local, mgmt->sa); |
d0709a65 JB |
1465 | if (!sta) { |
1466 | rcu_read_unlock(); | |
eadc8d9e | 1467 | return; |
d0709a65 | 1468 | } |
eadc8d9e RR |
1469 | |
1470 | capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab); | |
1471 | tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2; | |
1472 | ||
cee24a3e | 1473 | state = &sta->ampdu_mlme.tid_state_tx[tid]; |
eadc8d9e | 1474 | |
07346f81 | 1475 | spin_lock_bh(&sta->lock); |
eadc8d9e | 1476 | |
cee24a3e | 1477 | if (!(*state & HT_ADDBA_REQUESTED_MSK)) { |
07346f81 | 1478 | spin_unlock_bh(&sta->lock); |
cee24a3e RR |
1479 | goto addba_resp_exit; |
1480 | } | |
1481 | ||
eadc8d9e | 1482 | if (mgmt->u.action.u.addba_resp.dialog_token != |
cee24a3e | 1483 | sta->ampdu_mlme.tid_tx[tid]->dialog_token) { |
07346f81 | 1484 | spin_unlock_bh(&sta->lock); |
eadc8d9e RR |
1485 | #ifdef CONFIG_MAC80211_HT_DEBUG |
1486 | printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid); | |
1487 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
cee24a3e | 1488 | goto addba_resp_exit; |
eadc8d9e RR |
1489 | } |
1490 | ||
cee24a3e | 1491 | del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer); |
eadc8d9e RR |
1492 | #ifdef CONFIG_MAC80211_HT_DEBUG |
1493 | printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid); | |
1494 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1495 | if (le16_to_cpu(mgmt->u.action.u.addba_resp.status) | |
1496 | == WLAN_STATUS_SUCCESS) { | |
eadc8d9e | 1497 | *state |= HT_ADDBA_RECEIVED_MSK; |
cee24a3e | 1498 | sta->ampdu_mlme.addba_req_num[tid] = 0; |
eadc8d9e | 1499 | |
f4ea83dd | 1500 | if (*state == HT_AGG_STATE_OPERATIONAL) |
eadc8d9e | 1501 | ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]); |
eadc8d9e | 1502 | |
07346f81 | 1503 | spin_unlock_bh(&sta->lock); |
eadc8d9e | 1504 | } else { |
cee24a3e | 1505 | sta->ampdu_mlme.addba_req_num[tid]++; |
eadc8d9e RR |
1506 | /* this will allow the state check in stop_BA_session */ |
1507 | *state = HT_AGG_STATE_OPERATIONAL; | |
07346f81 | 1508 | spin_unlock_bh(&sta->lock); |
eadc8d9e RR |
1509 | ieee80211_stop_tx_ba_session(hw, sta->addr, tid, |
1510 | WLAN_BACK_INITIATOR); | |
1511 | } | |
cee24a3e RR |
1512 | |
1513 | addba_resp_exit: | |
d0709a65 | 1514 | rcu_read_unlock(); |
eadc8d9e RR |
1515 | } |
1516 | ||
f698d856 | 1517 | void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata, const u8 *da, u16 tid, |
eadc8d9e | 1518 | u16 initiator, u16 reason_code) |
07db2183 | 1519 | { |
f698d856 | 1520 | struct ieee80211_local *local = sdata->local; |
07db2183 RR |
1521 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
1522 | struct sk_buff *skb; | |
1523 | struct ieee80211_mgmt *mgmt; | |
1524 | u16 params; | |
1525 | ||
3acea5b6 | 1526 | skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom); |
07db2183 RR |
1527 | |
1528 | if (!skb) { | |
1529 | printk(KERN_ERR "%s: failed to allocate buffer " | |
f698d856 | 1530 | "for delba frame\n", sdata->dev->name); |
07db2183 RR |
1531 | return; |
1532 | } | |
1533 | ||
1534 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1535 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
1536 | memset(mgmt, 0, 24); | |
1537 | memcpy(mgmt->da, da, ETH_ALEN); | |
f698d856 | 1538 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
51fb61e7 | 1539 | if (sdata->vif.type == IEEE80211_IF_TYPE_AP) |
f698d856 | 1540 | memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN); |
07db2183 RR |
1541 | else |
1542 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
e7827a70 HH |
1543 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
1544 | IEEE80211_STYPE_ACTION); | |
07db2183 RR |
1545 | |
1546 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba)); | |
1547 | ||
1548 | mgmt->u.action.category = WLAN_CATEGORY_BACK; | |
1549 | mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA; | |
1550 | params = (u16)(initiator << 11); /* bit 11 initiator */ | |
1551 | params |= (u16)(tid << 12); /* bit 15:12 TID number */ | |
1552 | ||
1553 | mgmt->u.action.u.delba.params = cpu_to_le16(params); | |
1554 | mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code); | |
1555 | ||
f698d856 | 1556 | ieee80211_sta_tx(sdata, skb, 0); |
07db2183 RR |
1557 | } |
1558 | ||
f698d856 | 1559 | void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn) |
429a3805 | 1560 | { |
f698d856 | 1561 | struct ieee80211_local *local = sdata->local; |
429a3805 RR |
1562 | struct sk_buff *skb; |
1563 | struct ieee80211_bar *bar; | |
1564 | u16 bar_control = 0; | |
1565 | ||
1566 | skb = dev_alloc_skb(sizeof(*bar) + local->hw.extra_tx_headroom); | |
1567 | if (!skb) { | |
1568 | printk(KERN_ERR "%s: failed to allocate buffer for " | |
f698d856 | 1569 | "bar frame\n", sdata->dev->name); |
429a3805 RR |
1570 | return; |
1571 | } | |
1572 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1573 | bar = (struct ieee80211_bar *)skb_put(skb, sizeof(*bar)); | |
1574 | memset(bar, 0, sizeof(*bar)); | |
e7827a70 HH |
1575 | bar->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | |
1576 | IEEE80211_STYPE_BACK_REQ); | |
429a3805 | 1577 | memcpy(bar->ra, ra, ETH_ALEN); |
f698d856 | 1578 | memcpy(bar->ta, sdata->dev->dev_addr, ETH_ALEN); |
429a3805 RR |
1579 | bar_control |= (u16)IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL; |
1580 | bar_control |= (u16)IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA; | |
1581 | bar_control |= (u16)(tid << 12); | |
1582 | bar->control = cpu_to_le16(bar_control); | |
1583 | bar->start_seq_num = cpu_to_le16(ssn); | |
1584 | ||
f698d856 | 1585 | ieee80211_sta_tx(sdata, skb, 0); |
429a3805 RR |
1586 | } |
1587 | ||
f698d856 | 1588 | void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, |
07db2183 RR |
1589 | u16 initiator, u16 reason) |
1590 | { | |
f698d856 | 1591 | struct ieee80211_local *local = sdata->local; |
07db2183 RR |
1592 | struct ieee80211_hw *hw = &local->hw; |
1593 | struct sta_info *sta; | |
b580781e | 1594 | int ret, i; |
513a1025 | 1595 | DECLARE_MAC_BUF(mac); |
07db2183 | 1596 | |
d0709a65 JB |
1597 | rcu_read_lock(); |
1598 | ||
07db2183 | 1599 | sta = sta_info_get(local, ra); |
d0709a65 JB |
1600 | if (!sta) { |
1601 | rcu_read_unlock(); | |
07db2183 | 1602 | return; |
d0709a65 | 1603 | } |
07db2183 RR |
1604 | |
1605 | /* check if TID is in operational state */ | |
07346f81 | 1606 | spin_lock_bh(&sta->lock); |
cee24a3e | 1607 | if (sta->ampdu_mlme.tid_state_rx[tid] |
07db2183 | 1608 | != HT_AGG_STATE_OPERATIONAL) { |
07346f81 | 1609 | spin_unlock_bh(&sta->lock); |
d0709a65 | 1610 | rcu_read_unlock(); |
07db2183 RR |
1611 | return; |
1612 | } | |
cee24a3e | 1613 | sta->ampdu_mlme.tid_state_rx[tid] = |
07db2183 RR |
1614 | HT_AGG_STATE_REQ_STOP_BA_MSK | |
1615 | (initiator << HT_AGG_STATE_INITIATOR_SHIFT); | |
07346f81 | 1616 | spin_unlock_bh(&sta->lock); |
07db2183 RR |
1617 | |
1618 | /* stop HW Rx aggregation. ampdu_action existence | |
1619 | * already verified in session init so we add the BUG_ON */ | |
1620 | BUG_ON(!local->ops->ampdu_action); | |
1621 | ||
513a1025 RR |
1622 | #ifdef CONFIG_MAC80211_HT_DEBUG |
1623 | printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n", | |
1624 | print_mac(mac, ra), tid); | |
1625 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1626 | ||
07db2183 | 1627 | ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP, |
0df3ef45 | 1628 | ra, tid, NULL); |
07db2183 RR |
1629 | if (ret) |
1630 | printk(KERN_DEBUG "HW problem - can not stop rx " | |
f4ea83dd | 1631 | "aggregation for tid %d\n", tid); |
07db2183 RR |
1632 | |
1633 | /* shutdown timer has not expired */ | |
1634 | if (initiator != WLAN_BACK_TIMER) | |
cee24a3e | 1635 | del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer); |
07db2183 RR |
1636 | |
1637 | /* check if this is a self generated aggregation halt */ | |
1638 | if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER) | |
f698d856 | 1639 | ieee80211_send_delba(sdata, ra, tid, 0, reason); |
07db2183 RR |
1640 | |
1641 | /* free the reordering buffer */ | |
cee24a3e RR |
1642 | for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) { |
1643 | if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) { | |
b580781e | 1644 | /* release the reordered frames */ |
cee24a3e RR |
1645 | dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]); |
1646 | sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--; | |
1647 | sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL; | |
b580781e RR |
1648 | } |
1649 | } | |
cee24a3e RR |
1650 | /* free resources */ |
1651 | kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf); | |
1652 | kfree(sta->ampdu_mlme.tid_rx[tid]); | |
1653 | sta->ampdu_mlme.tid_rx[tid] = NULL; | |
1654 | sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE; | |
07db2183 | 1655 | |
d0709a65 | 1656 | rcu_read_unlock(); |
07db2183 RR |
1657 | } |
1658 | ||
eadc8d9e | 1659 | |
f698d856 | 1660 | static void ieee80211_sta_process_delba(struct ieee80211_sub_if_data *sdata, |
688b88a4 RR |
1661 | struct ieee80211_mgmt *mgmt, size_t len) |
1662 | { | |
f698d856 | 1663 | struct ieee80211_local *local = sdata->local; |
688b88a4 RR |
1664 | struct sta_info *sta; |
1665 | u16 tid, params; | |
1666 | u16 initiator; | |
1667 | DECLARE_MAC_BUF(mac); | |
1668 | ||
d0709a65 JB |
1669 | rcu_read_lock(); |
1670 | ||
688b88a4 | 1671 | sta = sta_info_get(local, mgmt->sa); |
d0709a65 JB |
1672 | if (!sta) { |
1673 | rcu_read_unlock(); | |
688b88a4 | 1674 | return; |
d0709a65 | 1675 | } |
688b88a4 RR |
1676 | |
1677 | params = le16_to_cpu(mgmt->u.action.u.delba.params); | |
1678 | tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12; | |
1679 | initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11; | |
1680 | ||
1681 | #ifdef CONFIG_MAC80211_HT_DEBUG | |
1682 | if (net_ratelimit()) | |
d92684e6 RR |
1683 | printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n", |
1684 | print_mac(mac, mgmt->sa), | |
2e354ed7 | 1685 | initiator ? "initiator" : "recipient", tid, |
688b88a4 RR |
1686 | mgmt->u.action.u.delba.reason_code); |
1687 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1688 | ||
1689 | if (initiator == WLAN_BACK_INITIATOR) | |
f698d856 | 1690 | ieee80211_sta_stop_rx_ba_session(sdata, sta->addr, tid, |
688b88a4 | 1691 | WLAN_BACK_INITIATOR, 0); |
d92684e6 | 1692 | else { /* WLAN_BACK_RECIPIENT */ |
07346f81 | 1693 | spin_lock_bh(&sta->lock); |
cee24a3e | 1694 | sta->ampdu_mlme.tid_state_tx[tid] = |
d92684e6 | 1695 | HT_AGG_STATE_OPERATIONAL; |
07346f81 | 1696 | spin_unlock_bh(&sta->lock); |
d92684e6 RR |
1697 | ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid, |
1698 | WLAN_BACK_RECIPIENT); | |
1699 | } | |
d0709a65 | 1700 | rcu_read_unlock(); |
688b88a4 RR |
1701 | } |
1702 | ||
eadc8d9e RR |
1703 | /* |
1704 | * After sending add Block Ack request we activated a timer until | |
1705 | * add Block Ack response will arrive from the recipient. | |
1706 | * If this timer expires sta_addba_resp_timer_expired will be executed. | |
1707 | */ | |
1708 | void sta_addba_resp_timer_expired(unsigned long data) | |
1709 | { | |
1710 | /* not an elegant detour, but there is no choice as the timer passes | |
1711 | * only one argument, and both sta_info and TID are needed, so init | |
73651ee6 | 1712 | * flow in sta_info_create gives the TID as data, while the timer_to_id |
eadc8d9e | 1713 | * array gives the sta through container_of */ |
70d251b2 | 1714 | u16 tid = *(u8 *)data; |
eadc8d9e RR |
1715 | struct sta_info *temp_sta = container_of((void *)data, |
1716 | struct sta_info, timer_to_tid[tid]); | |
1717 | ||
1718 | struct ieee80211_local *local = temp_sta->local; | |
1719 | struct ieee80211_hw *hw = &local->hw; | |
1720 | struct sta_info *sta; | |
1721 | u8 *state; | |
1722 | ||
d0709a65 JB |
1723 | rcu_read_lock(); |
1724 | ||
eadc8d9e | 1725 | sta = sta_info_get(local, temp_sta->addr); |
d0709a65 JB |
1726 | if (!sta) { |
1727 | rcu_read_unlock(); | |
eadc8d9e | 1728 | return; |
d0709a65 | 1729 | } |
eadc8d9e | 1730 | |
cee24a3e | 1731 | state = &sta->ampdu_mlme.tid_state_tx[tid]; |
eadc8d9e | 1732 | /* check if the TID waits for addBA response */ |
07346f81 | 1733 | spin_lock_bh(&sta->lock); |
eadc8d9e | 1734 | if (!(*state & HT_ADDBA_REQUESTED_MSK)) { |
07346f81 | 1735 | spin_unlock_bh(&sta->lock); |
eadc8d9e | 1736 | *state = HT_AGG_STATE_IDLE; |
f4ea83dd | 1737 | #ifdef CONFIG_MAC80211_HT_DEBUG |
eadc8d9e RR |
1738 | printk(KERN_DEBUG "timer expired on tid %d but we are not " |
1739 | "expecting addBA response there", tid); | |
f4ea83dd | 1740 | #endif |
eadc8d9e RR |
1741 | goto timer_expired_exit; |
1742 | } | |
1743 | ||
f4ea83dd | 1744 | #ifdef CONFIG_MAC80211_HT_DEBUG |
eadc8d9e | 1745 | printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid); |
f4ea83dd | 1746 | #endif |
eadc8d9e RR |
1747 | |
1748 | /* go through the state check in stop_BA_session */ | |
1749 | *state = HT_AGG_STATE_OPERATIONAL; | |
07346f81 | 1750 | spin_unlock_bh(&sta->lock); |
eadc8d9e RR |
1751 | ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid, |
1752 | WLAN_BACK_INITIATOR); | |
1753 | ||
1754 | timer_expired_exit: | |
d0709a65 | 1755 | rcu_read_unlock(); |
eadc8d9e RR |
1756 | } |
1757 | ||
07db2183 | 1758 | /* |
7b9d44cd RR |
1759 | * After accepting the AddBA Request we activated a timer, |
1760 | * resetting it after each frame that arrives from the originator. | |
07db2183 RR |
1761 | * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed. |
1762 | */ | |
712590de | 1763 | static void sta_rx_agg_session_timer_expired(unsigned long data) |
07db2183 RR |
1764 | { |
1765 | /* not an elegant detour, but there is no choice as the timer passes | |
70d251b2 | 1766 | * only one argument, and various sta_info are needed here, so init |
73651ee6 | 1767 | * flow in sta_info_create gives the TID as data, while the timer_to_id |
07db2183 RR |
1768 | * array gives the sta through container_of */ |
1769 | u8 *ptid = (u8 *)data; | |
1770 | u8 *timer_to_id = ptid - *ptid; | |
1771 | struct sta_info *sta = container_of(timer_to_id, struct sta_info, | |
1772 | timer_to_tid[0]); | |
1773 | ||
f4ea83dd | 1774 | #ifdef CONFIG_MAC80211_HT_DEBUG |
07db2183 | 1775 | printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid); |
f4ea83dd | 1776 | #endif |
f698d856 | 1777 | ieee80211_sta_stop_rx_ba_session(sta->sdata, sta->addr, |
d0709a65 | 1778 | (u16)*ptid, WLAN_BACK_TIMER, |
07db2183 RR |
1779 | WLAN_REASON_QSTA_TIMEOUT); |
1780 | } | |
1781 | ||
f698d856 | 1782 | void ieee80211_sta_tear_down_BA_sessions(struct ieee80211_sub_if_data *sdata, u8 *addr) |
85249e5f | 1783 | { |
f698d856 | 1784 | struct ieee80211_local *local = sdata->local; |
85249e5f RR |
1785 | int i; |
1786 | ||
1787 | for (i = 0; i < STA_TID_NUM; i++) { | |
1788 | ieee80211_stop_tx_ba_session(&local->hw, addr, i, | |
1789 | WLAN_BACK_INITIATOR); | |
f698d856 | 1790 | ieee80211_sta_stop_rx_ba_session(sdata, addr, i, |
85249e5f RR |
1791 | WLAN_BACK_RECIPIENT, |
1792 | WLAN_REASON_QSTA_LEAVE_QBSS); | |
1793 | } | |
1794 | } | |
07db2183 | 1795 | |
f698d856 | 1796 | static void ieee80211_send_refuse_measurement_request(struct ieee80211_sub_if_data *sdata, |
b6623486 AK |
1797 | struct ieee80211_msrment_ie *request_ie, |
1798 | const u8 *da, const u8 *bssid, | |
1799 | u8 dialog_token) | |
1800 | { | |
f698d856 | 1801 | struct ieee80211_local *local = sdata->local; |
b6623486 AK |
1802 | struct sk_buff *skb; |
1803 | struct ieee80211_mgmt *msr_report; | |
1804 | ||
1805 | skb = dev_alloc_skb(sizeof(*msr_report) + local->hw.extra_tx_headroom + | |
1806 | sizeof(struct ieee80211_msrment_ie)); | |
1807 | ||
1808 | if (!skb) { | |
1809 | printk(KERN_ERR "%s: failed to allocate buffer for " | |
f698d856 | 1810 | "measurement report frame\n", sdata->dev->name); |
b6623486 AK |
1811 | return; |
1812 | } | |
1813 | ||
1814 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1815 | msr_report = (struct ieee80211_mgmt *)skb_put(skb, 24); | |
1816 | memset(msr_report, 0, 24); | |
1817 | memcpy(msr_report->da, da, ETH_ALEN); | |
f698d856 | 1818 | memcpy(msr_report->sa, sdata->dev->dev_addr, ETH_ALEN); |
b6623486 | 1819 | memcpy(msr_report->bssid, bssid, ETH_ALEN); |
e7827a70 | 1820 | msr_report->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
b6623486 AK |
1821 | IEEE80211_STYPE_ACTION); |
1822 | ||
1823 | skb_put(skb, 1 + sizeof(msr_report->u.action.u.measurement)); | |
1824 | msr_report->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT; | |
1825 | msr_report->u.action.u.measurement.action_code = | |
1826 | WLAN_ACTION_SPCT_MSR_RPRT; | |
1827 | msr_report->u.action.u.measurement.dialog_token = dialog_token; | |
1828 | ||
1829 | msr_report->u.action.u.measurement.element_id = WLAN_EID_MEASURE_REPORT; | |
1830 | msr_report->u.action.u.measurement.length = | |
1831 | sizeof(struct ieee80211_msrment_ie); | |
1832 | ||
1833 | memset(&msr_report->u.action.u.measurement.msr_elem, 0, | |
1834 | sizeof(struct ieee80211_msrment_ie)); | |
1835 | msr_report->u.action.u.measurement.msr_elem.token = request_ie->token; | |
1836 | msr_report->u.action.u.measurement.msr_elem.mode |= | |
1837 | IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED; | |
1838 | msr_report->u.action.u.measurement.msr_elem.type = request_ie->type; | |
1839 | ||
f698d856 | 1840 | ieee80211_sta_tx(sdata, skb, 0); |
b6623486 AK |
1841 | } |
1842 | ||
f698d856 | 1843 | static void ieee80211_sta_process_measurement_req(struct ieee80211_sub_if_data *sdata, |
b6623486 AK |
1844 | struct ieee80211_mgmt *mgmt, |
1845 | size_t len) | |
1846 | { | |
1847 | /* | |
1848 | * Ignoring measurement request is spec violation. | |
1849 | * Mandatory measurements must be reported optional | |
1850 | * measurements might be refused or reported incapable | |
1851 | * For now just refuse | |
1852 | * TODO: Answer basic measurement as unmeasured | |
1853 | */ | |
f698d856 | 1854 | ieee80211_send_refuse_measurement_request(sdata, |
b6623486 AK |
1855 | &mgmt->u.action.u.measurement.msr_elem, |
1856 | mgmt->sa, mgmt->bssid, | |
1857 | mgmt->u.action.u.measurement.dialog_token); | |
1858 | } | |
1859 | ||
1860 | ||
f698d856 | 1861 | static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1862 | struct ieee80211_if_sta *ifsta, |
1863 | struct ieee80211_mgmt *mgmt, | |
1864 | size_t len) | |
1865 | { | |
f0706e82 | 1866 | u16 auth_alg, auth_transaction, status_code; |
0795af57 | 1867 | DECLARE_MAC_BUF(mac); |
f0706e82 | 1868 | |
48c2fc59 | 1869 | if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE && |
f4ea83dd | 1870 | sdata->vif.type != IEEE80211_IF_TYPE_IBSS) |
f0706e82 | 1871 | return; |
f0706e82 | 1872 | |
f4ea83dd | 1873 | if (len < 24 + 6) |
f0706e82 | 1874 | return; |
f0706e82 | 1875 | |
51fb61e7 | 1876 | if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS && |
f4ea83dd | 1877 | memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1878 | return; |
f0706e82 | 1879 | |
51fb61e7 | 1880 | if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS && |
f4ea83dd | 1881 | memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) |
f0706e82 | 1882 | return; |
f0706e82 JB |
1883 | |
1884 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
1885 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
1886 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
1887 | ||
51fb61e7 | 1888 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) { |
135a2110 JB |
1889 | /* |
1890 | * IEEE 802.11 standard does not require authentication in IBSS | |
f0706e82 JB |
1891 | * networks and most implementations do not seem to use it. |
1892 | * However, try to reply to authentication attempts if someone | |
1893 | * has actually implemented this. | |
135a2110 | 1894 | */ |
f4ea83dd | 1895 | if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) |
f0706e82 | 1896 | return; |
f698d856 | 1897 | ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0); |
f0706e82 JB |
1898 | } |
1899 | ||
1900 | if (auth_alg != ifsta->auth_alg || | |
f4ea83dd | 1901 | auth_transaction != ifsta->auth_transaction) |
f0706e82 | 1902 | return; |
f0706e82 JB |
1903 | |
1904 | if (status_code != WLAN_STATUS_SUCCESS) { | |
f0706e82 JB |
1905 | if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) { |
1906 | u8 algs[3]; | |
1907 | const int num_algs = ARRAY_SIZE(algs); | |
1908 | int i, pos; | |
1909 | algs[0] = algs[1] = algs[2] = 0xff; | |
1910 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
1911 | algs[0] = WLAN_AUTH_OPEN; | |
1912 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
1913 | algs[1] = WLAN_AUTH_SHARED_KEY; | |
1914 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
1915 | algs[2] = WLAN_AUTH_LEAP; | |
1916 | if (ifsta->auth_alg == WLAN_AUTH_OPEN) | |
1917 | pos = 0; | |
1918 | else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY) | |
1919 | pos = 1; | |
1920 | else | |
1921 | pos = 2; | |
1922 | for (i = 0; i < num_algs; i++) { | |
1923 | pos++; | |
1924 | if (pos >= num_algs) | |
1925 | pos = 0; | |
1926 | if (algs[pos] == ifsta->auth_alg || | |
1927 | algs[pos] == 0xff) | |
1928 | continue; | |
1929 | if (algs[pos] == WLAN_AUTH_SHARED_KEY && | |
f698d856 | 1930 | !ieee80211_sta_wep_configured(sdata)) |
f0706e82 JB |
1931 | continue; |
1932 | ifsta->auth_alg = algs[pos]; | |
f0706e82 JB |
1933 | break; |
1934 | } | |
1935 | } | |
1936 | return; | |
1937 | } | |
1938 | ||
1939 | switch (ifsta->auth_alg) { | |
1940 | case WLAN_AUTH_OPEN: | |
1941 | case WLAN_AUTH_LEAP: | |
f698d856 | 1942 | ieee80211_auth_completed(sdata, ifsta); |
f0706e82 JB |
1943 | break; |
1944 | case WLAN_AUTH_SHARED_KEY: | |
1945 | if (ifsta->auth_transaction == 4) | |
f698d856 | 1946 | ieee80211_auth_completed(sdata, ifsta); |
f0706e82 | 1947 | else |
f698d856 | 1948 | ieee80211_auth_challenge(sdata, ifsta, mgmt, len); |
f0706e82 JB |
1949 | break; |
1950 | } | |
1951 | } | |
1952 | ||
1953 | ||
f698d856 | 1954 | static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1955 | struct ieee80211_if_sta *ifsta, |
1956 | struct ieee80211_mgmt *mgmt, | |
1957 | size_t len) | |
1958 | { | |
1959 | u16 reason_code; | |
0795af57 | 1960 | DECLARE_MAC_BUF(mac); |
f0706e82 | 1961 | |
f4ea83dd | 1962 | if (len < 24 + 2) |
f0706e82 | 1963 | return; |
f0706e82 | 1964 | |
f4ea83dd | 1965 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1966 | return; |
f0706e82 JB |
1967 | |
1968 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
1969 | ||
988c0f72 | 1970 | if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) |
f698d856 | 1971 | printk(KERN_DEBUG "%s: deauthenticated\n", sdata->dev->name); |
f0706e82 | 1972 | |
48c2fc59 TW |
1973 | if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE || |
1974 | ifsta->state == IEEE80211_STA_MLME_ASSOCIATE || | |
1975 | ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) { | |
9859b81e | 1976 | ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
f0706e82 JB |
1977 | mod_timer(&ifsta->timer, jiffies + |
1978 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1979 | } | |
1980 | ||
f698d856 | 1981 | ieee80211_set_disassoc(sdata, ifsta, 1); |
d6f2da5b | 1982 | ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED; |
f0706e82 JB |
1983 | } |
1984 | ||
1985 | ||
f698d856 | 1986 | static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1987 | struct ieee80211_if_sta *ifsta, |
1988 | struct ieee80211_mgmt *mgmt, | |
1989 | size_t len) | |
1990 | { | |
1991 | u16 reason_code; | |
0795af57 | 1992 | DECLARE_MAC_BUF(mac); |
f0706e82 | 1993 | |
f4ea83dd | 1994 | if (len < 24 + 2) |
f0706e82 | 1995 | return; |
f0706e82 | 1996 | |
f4ea83dd | 1997 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1998 | return; |
f0706e82 JB |
1999 | |
2000 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
2001 | ||
d6f2da5b | 2002 | if (ifsta->flags & IEEE80211_STA_ASSOCIATED) |
f698d856 | 2003 | printk(KERN_DEBUG "%s: disassociated\n", sdata->dev->name); |
f0706e82 | 2004 | |
48c2fc59 TW |
2005 | if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) { |
2006 | ifsta->state = IEEE80211_STA_MLME_ASSOCIATE; | |
f0706e82 JB |
2007 | mod_timer(&ifsta->timer, jiffies + |
2008 | IEEE80211_RETRY_AUTH_INTERVAL); | |
2009 | } | |
2010 | ||
f698d856 | 2011 | ieee80211_set_disassoc(sdata, ifsta, 0); |
f0706e82 JB |
2012 | } |
2013 | ||
2014 | ||
471b3efd | 2015 | static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2016 | struct ieee80211_if_sta *ifsta, |
2017 | struct ieee80211_mgmt *mgmt, | |
2018 | size_t len, | |
2019 | int reassoc) | |
2020 | { | |
471b3efd | 2021 | struct ieee80211_local *local = sdata->local; |
8318d78a | 2022 | struct ieee80211_supported_band *sband; |
f0706e82 | 2023 | struct sta_info *sta; |
8318d78a | 2024 | u64 rates, basic_rates; |
f0706e82 JB |
2025 | u16 capab_info, status_code, aid; |
2026 | struct ieee802_11_elems elems; | |
471b3efd | 2027 | struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf; |
f0706e82 JB |
2028 | u8 *pos; |
2029 | int i, j; | |
0795af57 | 2030 | DECLARE_MAC_BUF(mac); |
8318d78a | 2031 | bool have_higher_than_11mbit = false; |
f0706e82 JB |
2032 | |
2033 | /* AssocResp and ReassocResp have identical structure, so process both | |
2034 | * of them in this function. */ | |
2035 | ||
48c2fc59 | 2036 | if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE) |
f0706e82 | 2037 | return; |
f0706e82 | 2038 | |
f4ea83dd | 2039 | if (len < 24 + 6) |
f0706e82 | 2040 | return; |
f0706e82 | 2041 | |
f4ea83dd | 2042 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 2043 | return; |
f0706e82 JB |
2044 | |
2045 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
2046 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
2047 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
f0706e82 | 2048 | |
0795af57 | 2049 | printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x " |
f0706e82 | 2050 | "status=%d aid=%d)\n", |
f698d856 | 2051 | sdata->dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa), |
ddd68587 | 2052 | capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); |
f0706e82 JB |
2053 | |
2054 | if (status_code != WLAN_STATUS_SUCCESS) { | |
2055 | printk(KERN_DEBUG "%s: AP denied association (code=%d)\n", | |
f698d856 | 2056 | sdata->dev->name, status_code); |
8a69aa93 DD |
2057 | /* if this was a reassociation, ensure we try a "full" |
2058 | * association next time. This works around some broken APs | |
2059 | * which do not correctly reject reassociation requests. */ | |
d6f2da5b | 2060 | ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
f0706e82 JB |
2061 | return; |
2062 | } | |
2063 | ||
1dd84aa2 JB |
2064 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
2065 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " | |
f698d856 | 2066 | "set\n", sdata->dev->name, aid); |
1dd84aa2 JB |
2067 | aid &= ~(BIT(15) | BIT(14)); |
2068 | ||
f0706e82 | 2069 | pos = mgmt->u.assoc_resp.variable; |
67a4cce4 | 2070 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
f0706e82 JB |
2071 | |
2072 | if (!elems.supp_rates) { | |
2073 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", | |
f698d856 | 2074 | sdata->dev->name); |
f0706e82 JB |
2075 | return; |
2076 | } | |
2077 | ||
f698d856 | 2078 | printk(KERN_DEBUG "%s: associated\n", sdata->dev->name); |
f0706e82 JB |
2079 | ifsta->aid = aid; |
2080 | ifsta->ap_capab = capab_info; | |
2081 | ||
2082 | kfree(ifsta->assocresp_ies); | |
2083 | ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt); | |
0ec0b7ac | 2084 | ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL); |
f0706e82 JB |
2085 | if (ifsta->assocresp_ies) |
2086 | memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len); | |
2087 | ||
d0709a65 JB |
2088 | rcu_read_lock(); |
2089 | ||
f0706e82 JB |
2090 | /* Add STA entry for the AP */ |
2091 | sta = sta_info_get(local, ifsta->bssid); | |
2092 | if (!sta) { | |
2093 | struct ieee80211_sta_bss *bss; | |
73651ee6 | 2094 | int err; |
d0709a65 | 2095 | |
73651ee6 JB |
2096 | sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC); |
2097 | if (!sta) { | |
2098 | printk(KERN_DEBUG "%s: failed to alloc STA entry for" | |
f698d856 | 2099 | " the AP\n", sdata->dev->name); |
d0709a65 | 2100 | rcu_read_unlock(); |
f0706e82 JB |
2101 | return; |
2102 | } | |
f698d856 | 2103 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
8318d78a | 2104 | local->hw.conf.channel->center_freq, |
cffdd30d | 2105 | ifsta->ssid, ifsta->ssid_len); |
f0706e82 | 2106 | if (bss) { |
f0706e82 | 2107 | sta->last_signal = bss->signal; |
566bfe5a | 2108 | sta->last_qual = bss->qual; |
f0706e82 | 2109 | sta->last_noise = bss->noise; |
3e122be0 | 2110 | ieee80211_rx_bss_put(local, bss); |
f0706e82 | 2111 | } |
73651ee6 JB |
2112 | |
2113 | err = sta_info_insert(sta); | |
2114 | if (err) { | |
2115 | printk(KERN_DEBUG "%s: failed to insert STA entry for" | |
f698d856 | 2116 | " the AP (error %d)\n", sdata->dev->name, err); |
73651ee6 JB |
2117 | rcu_read_unlock(); |
2118 | return; | |
2119 | } | |
a61dae1f RR |
2120 | /* update new sta with its last rx activity */ |
2121 | sta->last_rx = jiffies; | |
f0706e82 JB |
2122 | } |
2123 | ||
73651ee6 JB |
2124 | /* |
2125 | * FIXME: Do we really need to update the sta_info's information here? | |
2126 | * We already know about the AP (we found it in our list) so it | |
2127 | * should already be filled with the right info, no? | |
2128 | * As is stands, all this is racy because typically we assume | |
2129 | * the information that is filled in here (except flags) doesn't | |
2130 | * change while a STA structure is alive. As such, it should move | |
2131 | * to between the sta_info_alloc() and sta_info_insert() above. | |
2132 | */ | |
2133 | ||
07346f81 JB |
2134 | set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP | |
2135 | WLAN_STA_AUTHORIZED); | |
f0706e82 JB |
2136 | |
2137 | rates = 0; | |
8318d78a JB |
2138 | basic_rates = 0; |
2139 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
2140 | ||
f0706e82 JB |
2141 | for (i = 0; i < elems.supp_rates_len; i++) { |
2142 | int rate = (elems.supp_rates[i] & 0x7f) * 5; | |
8318d78a JB |
2143 | |
2144 | if (rate > 110) | |
2145 | have_higher_than_11mbit = true; | |
2146 | ||
2147 | for (j = 0; j < sband->n_bitrates; j++) { | |
2148 | if (sband->bitrates[j].bitrate == rate) | |
f0706e82 | 2149 | rates |= BIT(j); |
8318d78a JB |
2150 | if (elems.supp_rates[i] & 0x80) |
2151 | basic_rates |= BIT(j); | |
2152 | } | |
f0706e82 | 2153 | } |
8318d78a | 2154 | |
f0706e82 JB |
2155 | for (i = 0; i < elems.ext_supp_rates_len; i++) { |
2156 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; | |
8318d78a JB |
2157 | |
2158 | if (rate > 110) | |
2159 | have_higher_than_11mbit = true; | |
2160 | ||
2161 | for (j = 0; j < sband->n_bitrates; j++) { | |
2162 | if (sband->bitrates[j].bitrate == rate) | |
f0706e82 | 2163 | rates |= BIT(j); |
8318d78a JB |
2164 | if (elems.ext_supp_rates[i] & 0x80) |
2165 | basic_rates |= BIT(j); | |
2166 | } | |
f0706e82 | 2167 | } |
8318d78a JB |
2168 | |
2169 | sta->supp_rates[local->hw.conf.channel->band] = rates; | |
2170 | sdata->basic_rates = basic_rates; | |
2171 | ||
2172 | /* cf. IEEE 802.11 9.2.12 */ | |
2173 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
2174 | have_higher_than_11mbit) | |
2175 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
2176 | else | |
2177 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
f0706e82 | 2178 | |
3434fbd3 JB |
2179 | if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param && |
2180 | (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) { | |
d3c990fb | 2181 | struct ieee80211_ht_bss_info bss_info; |
d3c990fb RR |
2182 | ieee80211_ht_cap_ie_to_ht_info( |
2183 | (struct ieee80211_ht_cap *) | |
2184 | elems.ht_cap_elem, &sta->ht_info); | |
2185 | ieee80211_ht_addt_info_ie_to_ht_bss_info( | |
2186 | (struct ieee80211_ht_addt_info *) | |
2187 | elems.ht_info_elem, &bss_info); | |
38668c05 | 2188 | ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info); |
d3c990fb RR |
2189 | } |
2190 | ||
f0706e82 JB |
2191 | rate_control_rate_init(sta, local); |
2192 | ||
3434fbd3 | 2193 | if (elems.wmm_param) { |
07346f81 | 2194 | set_sta_flags(sta, WLAN_STA_WME); |
e5f98f2d | 2195 | rcu_read_unlock(); |
f698d856 | 2196 | ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param, |
f0706e82 | 2197 | elems.wmm_param_len); |
e5f98f2d JB |
2198 | } else |
2199 | rcu_read_unlock(); | |
f0706e82 | 2200 | |
21c0cbe7 TW |
2201 | /* set AID and assoc capability, |
2202 | * ieee80211_set_associated() will tell the driver */ | |
8318d78a | 2203 | bss_conf->aid = aid; |
21c0cbe7 | 2204 | bss_conf->assoc_capability = capab_info; |
f698d856 | 2205 | ieee80211_set_associated(sdata, ifsta, 1); |
f0706e82 | 2206 | |
f698d856 | 2207 | ieee80211_associated(sdata, ifsta); |
f0706e82 JB |
2208 | } |
2209 | ||
2210 | ||
2211 | /* Caller must hold local->sta_bss_lock */ | |
f698d856 | 2212 | static void __ieee80211_rx_bss_hash_add(struct ieee80211_local *local, |
f0706e82 JB |
2213 | struct ieee80211_sta_bss *bss) |
2214 | { | |
f709fc69 | 2215 | u8 hash_idx; |
902acc78 JB |
2216 | |
2217 | if (bss_mesh_cfg(bss)) | |
2218 | hash_idx = mesh_id_hash(bss_mesh_id(bss), | |
2219 | bss_mesh_id_len(bss)); | |
f709fc69 | 2220 | else |
f709fc69 | 2221 | hash_idx = STA_HASH(bss->bssid); |
902acc78 | 2222 | |
f709fc69 LCC |
2223 | bss->hnext = local->sta_bss_hash[hash_idx]; |
2224 | local->sta_bss_hash[hash_idx] = bss; | |
f0706e82 JB |
2225 | } |
2226 | ||
2227 | ||
2228 | /* Caller must hold local->sta_bss_lock */ | |
3e122be0 | 2229 | static void __ieee80211_rx_bss_hash_del(struct ieee80211_local *local, |
f0706e82 JB |
2230 | struct ieee80211_sta_bss *bss) |
2231 | { | |
f0706e82 JB |
2232 | struct ieee80211_sta_bss *b, *prev = NULL; |
2233 | b = local->sta_bss_hash[STA_HASH(bss->bssid)]; | |
2234 | while (b) { | |
2235 | if (b == bss) { | |
2236 | if (!prev) | |
2237 | local->sta_bss_hash[STA_HASH(bss->bssid)] = | |
2238 | bss->hnext; | |
2239 | else | |
2240 | prev->hnext = bss->hnext; | |
2241 | break; | |
2242 | } | |
2243 | prev = b; | |
2244 | b = b->hnext; | |
2245 | } | |
2246 | } | |
2247 | ||
2248 | ||
2249 | static struct ieee80211_sta_bss * | |
f698d856 | 2250 | ieee80211_rx_bss_add(struct ieee80211_sub_if_data *sdata, u8 *bssid, int freq, |
cffdd30d | 2251 | u8 *ssid, u8 ssid_len) |
f0706e82 | 2252 | { |
f698d856 | 2253 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
2254 | struct ieee80211_sta_bss *bss; |
2255 | ||
dd00cc48 | 2256 | bss = kzalloc(sizeof(*bss), GFP_ATOMIC); |
f0706e82 JB |
2257 | if (!bss) |
2258 | return NULL; | |
f0706e82 JB |
2259 | atomic_inc(&bss->users); |
2260 | atomic_inc(&bss->users); | |
2261 | memcpy(bss->bssid, bssid, ETH_ALEN); | |
8318d78a | 2262 | bss->freq = freq; |
cffdd30d JL |
2263 | if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) { |
2264 | memcpy(bss->ssid, ssid, ssid_len); | |
2265 | bss->ssid_len = ssid_len; | |
2266 | } | |
f0706e82 JB |
2267 | |
2268 | spin_lock_bh(&local->sta_bss_lock); | |
2269 | /* TODO: order by RSSI? */ | |
2270 | list_add_tail(&bss->list, &local->sta_bss_list); | |
f698d856 | 2271 | __ieee80211_rx_bss_hash_add(local, bss); |
f0706e82 JB |
2272 | spin_unlock_bh(&local->sta_bss_lock); |
2273 | return bss; | |
2274 | } | |
2275 | ||
f0706e82 | 2276 | static struct ieee80211_sta_bss * |
f698d856 | 2277 | ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq, |
cffdd30d | 2278 | u8 *ssid, u8 ssid_len) |
f0706e82 | 2279 | { |
f0706e82 JB |
2280 | struct ieee80211_sta_bss *bss; |
2281 | ||
2282 | spin_lock_bh(&local->sta_bss_lock); | |
2283 | bss = local->sta_bss_hash[STA_HASH(bssid)]; | |
2284 | while (bss) { | |
902acc78 JB |
2285 | if (!bss_mesh_cfg(bss) && |
2286 | !memcmp(bss->bssid, bssid, ETH_ALEN) && | |
8318d78a | 2287 | bss->freq == freq && |
cffdd30d JL |
2288 | bss->ssid_len == ssid_len && |
2289 | (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) { | |
f0706e82 JB |
2290 | atomic_inc(&bss->users); |
2291 | break; | |
2292 | } | |
2293 | bss = bss->hnext; | |
2294 | } | |
2295 | spin_unlock_bh(&local->sta_bss_lock); | |
2296 | return bss; | |
2297 | } | |
2298 | ||
f709fc69 LCC |
2299 | #ifdef CONFIG_MAC80211_MESH |
2300 | static struct ieee80211_sta_bss * | |
f698d856 | 2301 | ieee80211_rx_mesh_bss_get(struct ieee80211_local *local, u8 *mesh_id, int mesh_id_len, |
f709fc69 LCC |
2302 | u8 *mesh_cfg, int freq) |
2303 | { | |
f709fc69 LCC |
2304 | struct ieee80211_sta_bss *bss; |
2305 | ||
2306 | spin_lock_bh(&local->sta_bss_lock); | |
2307 | bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)]; | |
2308 | while (bss) { | |
902acc78 JB |
2309 | if (bss_mesh_cfg(bss) && |
2310 | !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) && | |
f709fc69 LCC |
2311 | bss->freq == freq && |
2312 | mesh_id_len == bss->mesh_id_len && | |
2313 | (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id, | |
2314 | mesh_id_len))) { | |
2315 | atomic_inc(&bss->users); | |
2316 | break; | |
2317 | } | |
2318 | bss = bss->hnext; | |
2319 | } | |
2320 | spin_unlock_bh(&local->sta_bss_lock); | |
2321 | return bss; | |
2322 | } | |
2323 | ||
2324 | static struct ieee80211_sta_bss * | |
f698d856 | 2325 | ieee80211_rx_mesh_bss_add(struct ieee80211_local *local, u8 *mesh_id, int mesh_id_len, |
05e5e883 | 2326 | u8 *mesh_cfg, int mesh_config_len, int freq) |
f709fc69 | 2327 | { |
f709fc69 LCC |
2328 | struct ieee80211_sta_bss *bss; |
2329 | ||
05e5e883 LCC |
2330 | if (mesh_config_len != MESH_CFG_LEN) |
2331 | return NULL; | |
2332 | ||
f709fc69 LCC |
2333 | bss = kzalloc(sizeof(*bss), GFP_ATOMIC); |
2334 | if (!bss) | |
2335 | return NULL; | |
2336 | ||
24736701 | 2337 | bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC); |
f709fc69 LCC |
2338 | if (!bss->mesh_cfg) { |
2339 | kfree(bss); | |
2340 | return NULL; | |
2341 | } | |
2342 | ||
2343 | if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) { | |
2344 | bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC); | |
2345 | if (!bss->mesh_id) { | |
2346 | kfree(bss->mesh_cfg); | |
2347 | kfree(bss); | |
2348 | return NULL; | |
2349 | } | |
2350 | memcpy(bss->mesh_id, mesh_id, mesh_id_len); | |
2351 | } | |
2352 | ||
2353 | atomic_inc(&bss->users); | |
2354 | atomic_inc(&bss->users); | |
24736701 | 2355 | memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN); |
f709fc69 LCC |
2356 | bss->mesh_id_len = mesh_id_len; |
2357 | bss->freq = freq; | |
2358 | spin_lock_bh(&local->sta_bss_lock); | |
2359 | /* TODO: order by RSSI? */ | |
2360 | list_add_tail(&bss->list, &local->sta_bss_list); | |
f698d856 | 2361 | __ieee80211_rx_bss_hash_add(local, bss); |
f709fc69 LCC |
2362 | spin_unlock_bh(&local->sta_bss_lock); |
2363 | return bss; | |
2364 | } | |
2365 | #endif | |
f0706e82 JB |
2366 | |
2367 | static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss) | |
2368 | { | |
43ac2ca3 | 2369 | kfree(bss->ies); |
902acc78 JB |
2370 | kfree(bss_mesh_id(bss)); |
2371 | kfree(bss_mesh_cfg(bss)); | |
f0706e82 JB |
2372 | kfree(bss); |
2373 | } | |
2374 | ||
2375 | ||
3e122be0 | 2376 | static void ieee80211_rx_bss_put(struct ieee80211_local *local, |
f0706e82 JB |
2377 | struct ieee80211_sta_bss *bss) |
2378 | { | |
1ebebea8 PE |
2379 | local_bh_disable(); |
2380 | if (!atomic_dec_and_lock(&bss->users, &local->sta_bss_lock)) { | |
2381 | local_bh_enable(); | |
f0706e82 | 2382 | return; |
1ebebea8 | 2383 | } |
f0706e82 | 2384 | |
3e122be0 | 2385 | __ieee80211_rx_bss_hash_del(local, bss); |
f0706e82 JB |
2386 | list_del(&bss->list); |
2387 | spin_unlock_bh(&local->sta_bss_lock); | |
2388 | ieee80211_rx_bss_free(bss); | |
2389 | } | |
2390 | ||
2391 | ||
3e122be0 | 2392 | void ieee80211_rx_bss_list_init(struct ieee80211_local *local) |
f0706e82 | 2393 | { |
f0706e82 JB |
2394 | spin_lock_init(&local->sta_bss_lock); |
2395 | INIT_LIST_HEAD(&local->sta_bss_list); | |
2396 | } | |
2397 | ||
2398 | ||
3e122be0 | 2399 | void ieee80211_rx_bss_list_deinit(struct ieee80211_local *local) |
f0706e82 | 2400 | { |
f0706e82 JB |
2401 | struct ieee80211_sta_bss *bss, *tmp; |
2402 | ||
2403 | list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list) | |
3e122be0 | 2404 | ieee80211_rx_bss_put(local, bss); |
f0706e82 JB |
2405 | } |
2406 | ||
2407 | ||
f698d856 | 2408 | static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, |
a607268a BR |
2409 | struct ieee80211_if_sta *ifsta, |
2410 | struct ieee80211_sta_bss *bss) | |
2411 | { | |
f698d856 | 2412 | struct ieee80211_local *local = sdata->local; |
a607268a BR |
2413 | int res, rates, i, j; |
2414 | struct sk_buff *skb; | |
2415 | struct ieee80211_mgmt *mgmt; | |
a607268a | 2416 | u8 *pos; |
a607268a | 2417 | struct ieee80211_supported_band *sband; |
507b06d0 | 2418 | union iwreq_data wrqu; |
a607268a BR |
2419 | |
2420 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
2421 | ||
2422 | /* Remove possible STA entries from other IBSS networks. */ | |
dc6676b7 | 2423 | sta_info_flush_delayed(sdata); |
a607268a BR |
2424 | |
2425 | if (local->ops->reset_tsf) { | |
2426 | /* Reset own TSF to allow time synchronization work. */ | |
2427 | local->ops->reset_tsf(local_to_hw(local)); | |
2428 | } | |
2429 | memcpy(ifsta->bssid, bss->bssid, ETH_ALEN); | |
9d139c81 | 2430 | res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID); |
a607268a BR |
2431 | if (res) |
2432 | return res; | |
2433 | ||
2434 | local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10; | |
2435 | ||
a607268a BR |
2436 | sdata->drop_unencrypted = bss->capability & |
2437 | WLAN_CAPABILITY_PRIVACY ? 1 : 0; | |
2438 | ||
f698d856 | 2439 | res = ieee80211_set_freq(sdata, bss->freq); |
a607268a | 2440 | |
be038b37 AK |
2441 | if (res) |
2442 | return res; | |
a607268a | 2443 | |
9d139c81 | 2444 | /* Build IBSS probe response */ |
a607268a | 2445 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400); |
9d139c81 | 2446 | if (skb) { |
a607268a BR |
2447 | skb_reserve(skb, local->hw.extra_tx_headroom); |
2448 | ||
2449 | mgmt = (struct ieee80211_mgmt *) | |
2450 | skb_put(skb, 24 + sizeof(mgmt->u.beacon)); | |
2451 | memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon)); | |
e7827a70 HH |
2452 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
2453 | IEEE80211_STYPE_PROBE_RESP); | |
a607268a | 2454 | memset(mgmt->da, 0xff, ETH_ALEN); |
f698d856 | 2455 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
a607268a BR |
2456 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); |
2457 | mgmt->u.beacon.beacon_int = | |
2458 | cpu_to_le16(local->hw.conf.beacon_int); | |
4faeb860 | 2459 | mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp); |
a607268a BR |
2460 | mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability); |
2461 | ||
2462 | pos = skb_put(skb, 2 + ifsta->ssid_len); | |
2463 | *pos++ = WLAN_EID_SSID; | |
2464 | *pos++ = ifsta->ssid_len; | |
2465 | memcpy(pos, ifsta->ssid, ifsta->ssid_len); | |
2466 | ||
2467 | rates = bss->supp_rates_len; | |
2468 | if (rates > 8) | |
2469 | rates = 8; | |
2470 | pos = skb_put(skb, 2 + rates); | |
2471 | *pos++ = WLAN_EID_SUPP_RATES; | |
2472 | *pos++ = rates; | |
2473 | memcpy(pos, bss->supp_rates, rates); | |
2474 | ||
2475 | if (bss->band == IEEE80211_BAND_2GHZ) { | |
2476 | pos = skb_put(skb, 2 + 1); | |
2477 | *pos++ = WLAN_EID_DS_PARAMS; | |
2478 | *pos++ = 1; | |
2479 | *pos++ = ieee80211_frequency_to_channel(bss->freq); | |
2480 | } | |
2481 | ||
2482 | pos = skb_put(skb, 2 + 2); | |
2483 | *pos++ = WLAN_EID_IBSS_PARAMS; | |
2484 | *pos++ = 2; | |
2485 | /* FIX: set ATIM window based on scan results */ | |
2486 | *pos++ = 0; | |
2487 | *pos++ = 0; | |
2488 | ||
2489 | if (bss->supp_rates_len > 8) { | |
2490 | rates = bss->supp_rates_len - 8; | |
2491 | pos = skb_put(skb, 2 + rates); | |
2492 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
2493 | *pos++ = rates; | |
2494 | memcpy(pos, &bss->supp_rates[8], rates); | |
2495 | } | |
2496 | ||
9d139c81 | 2497 | ifsta->probe_resp = skb; |
e039fa4a | 2498 | |
9d139c81 JB |
2499 | ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON); |
2500 | } | |
a607268a | 2501 | |
9d139c81 JB |
2502 | rates = 0; |
2503 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
2504 | for (i = 0; i < bss->supp_rates_len; i++) { | |
2505 | int bitrate = (bss->supp_rates[i] & 0x7f) * 5; | |
2506 | for (j = 0; j < sband->n_bitrates; j++) | |
2507 | if (sband->bitrates[j].bitrate == bitrate) | |
2508 | rates |= BIT(j); | |
a607268a | 2509 | } |
9d139c81 JB |
2510 | ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates; |
2511 | ||
f698d856 | 2512 | ieee80211_sta_def_wmm_params(sdata, bss, 1); |
a607268a | 2513 | |
48c2fc59 | 2514 | ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED; |
a607268a BR |
2515 | mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); |
2516 | ||
507b06d0 DW |
2517 | memset(&wrqu, 0, sizeof(wrqu)); |
2518 | memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN); | |
f698d856 | 2519 | wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL); |
a607268a BR |
2520 | |
2521 | return res; | |
2522 | } | |
2523 | ||
f709fc69 LCC |
2524 | u64 ieee80211_sta_get_rates(struct ieee80211_local *local, |
2525 | struct ieee802_11_elems *elems, | |
2526 | enum ieee80211_band band) | |
2527 | { | |
2528 | struct ieee80211_supported_band *sband; | |
2529 | struct ieee80211_rate *bitrates; | |
2530 | size_t num_rates; | |
2531 | u64 supp_rates; | |
2532 | int i, j; | |
2533 | sband = local->hw.wiphy->bands[band]; | |
2534 | ||
2535 | if (!sband) { | |
2536 | WARN_ON(1); | |
2537 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
2538 | } | |
2539 | ||
2540 | bitrates = sband->bitrates; | |
2541 | num_rates = sband->n_bitrates; | |
2542 | supp_rates = 0; | |
2543 | for (i = 0; i < elems->supp_rates_len + | |
2544 | elems->ext_supp_rates_len; i++) { | |
2545 | u8 rate = 0; | |
2546 | int own_rate; | |
2547 | if (i < elems->supp_rates_len) | |
2548 | rate = elems->supp_rates[i]; | |
2549 | else if (elems->ext_supp_rates) | |
2550 | rate = elems->ext_supp_rates | |
2551 | [i - elems->supp_rates_len]; | |
2552 | own_rate = 5 * (rate & 0x7f); | |
2553 | for (j = 0; j < num_rates; j++) | |
2554 | if (bitrates[j].bitrate == own_rate) | |
2555 | supp_rates |= BIT(j); | |
2556 | } | |
2557 | return supp_rates; | |
2558 | } | |
2559 | ||
a607268a | 2560 | |
f698d856 | 2561 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2562 | struct ieee80211_mgmt *mgmt, |
2563 | size_t len, | |
2564 | struct ieee80211_rx_status *rx_status, | |
9859b81e | 2565 | struct ieee802_11_elems *elems) |
f0706e82 | 2566 | { |
f698d856 | 2567 | struct ieee80211_local *local = sdata->local; |
8318d78a | 2568 | int freq, clen; |
f0706e82 JB |
2569 | struct ieee80211_sta_bss *bss; |
2570 | struct sta_info *sta; | |
9d9bf77d | 2571 | u64 beacon_timestamp, rx_timestamp; |
fab7d4a2 | 2572 | struct ieee80211_channel *channel; |
9859b81e | 2573 | bool beacon = ieee80211_is_beacon(mgmt->frame_control); |
0795af57 JP |
2574 | DECLARE_MAC_BUF(mac); |
2575 | DECLARE_MAC_BUF(mac2); | |
f0706e82 | 2576 | |
9d9bf77d | 2577 | beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp); |
f0706e82 | 2578 | |
ae6a44e3 | 2579 | if (ieee80211_vif_is_mesh(&sdata->vif) && elems->mesh_id && |
f698d856 | 2580 | elems->mesh_config && mesh_matches_local(elems, sdata)) { |
ae6a44e3 | 2581 | u64 rates = ieee80211_sta_get_rates(local, elems, |
902acc78 JB |
2582 | rx_status->band); |
2583 | ||
f698d856 JBG |
2584 | mesh_neighbour_update(mgmt->sa, rates, sdata, |
2585 | mesh_peer_accepts_plinks(elems)); | |
902acc78 | 2586 | } |
f709fc69 | 2587 | |
d0709a65 JB |
2588 | rcu_read_lock(); |
2589 | ||
ae6a44e3 | 2590 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems->supp_rates && |
f0706e82 JB |
2591 | memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 && |
2592 | (sta = sta_info_get(local, mgmt->sa))) { | |
f709fc69 | 2593 | u64 prev_rates; |
ae6a44e3 | 2594 | u64 supp_rates = ieee80211_sta_get_rates(local, elems, |
f709fc69 | 2595 | rx_status->band); |
f0706e82 | 2596 | |
8318d78a | 2597 | prev_rates = sta->supp_rates[rx_status->band]; |
9818babc | 2598 | sta->supp_rates[rx_status->band] = supp_rates; |
8318d78a | 2599 | if (sta->supp_rates[rx_status->band] == 0) { |
f0706e82 JB |
2600 | /* No matching rates - this should not really happen. |
2601 | * Make sure that at least one rate is marked | |
2602 | * supported to avoid issues with TX rate ctrl. */ | |
8318d78a JB |
2603 | sta->supp_rates[rx_status->band] = |
2604 | sdata->u.sta.supp_rates_bits[rx_status->band]; | |
f0706e82 | 2605 | } |
f0706e82 JB |
2606 | } |
2607 | ||
d0709a65 JB |
2608 | rcu_read_unlock(); |
2609 | ||
ae6a44e3 EK |
2610 | if (elems->ds_params && elems->ds_params_len == 1) |
2611 | freq = ieee80211_channel_to_frequency(elems->ds_params[0]); | |
f0706e82 | 2612 | else |
8318d78a | 2613 | freq = rx_status->freq; |
f0706e82 | 2614 | |
fab7d4a2 JB |
2615 | channel = ieee80211_get_channel(local->hw.wiphy, freq); |
2616 | ||
2617 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
2618 | return; | |
2619 | ||
f709fc69 | 2620 | #ifdef CONFIG_MAC80211_MESH |
ae6a44e3 | 2621 | if (elems->mesh_config) |
f698d856 | 2622 | bss = ieee80211_rx_mesh_bss_get(local, elems->mesh_id, |
ae6a44e3 | 2623 | elems->mesh_id_len, elems->mesh_config, freq); |
f709fc69 LCC |
2624 | else |
2625 | #endif | |
f698d856 | 2626 | bss = ieee80211_rx_bss_get(local, mgmt->bssid, freq, |
ae6a44e3 | 2627 | elems->ssid, elems->ssid_len); |
f709fc69 LCC |
2628 | if (!bss) { |
2629 | #ifdef CONFIG_MAC80211_MESH | |
ae6a44e3 | 2630 | if (elems->mesh_config) |
f698d856 | 2631 | bss = ieee80211_rx_mesh_bss_add(local, elems->mesh_id, |
ae6a44e3 EK |
2632 | elems->mesh_id_len, elems->mesh_config, |
2633 | elems->mesh_config_len, freq); | |
f709fc69 LCC |
2634 | else |
2635 | #endif | |
f698d856 | 2636 | bss = ieee80211_rx_bss_add(sdata, mgmt->bssid, freq, |
ae6a44e3 | 2637 | elems->ssid, elems->ssid_len); |
f0706e82 JB |
2638 | if (!bss) |
2639 | return; | |
2640 | } else { | |
2641 | #if 0 | |
2642 | /* TODO: order by RSSI? */ | |
2643 | spin_lock_bh(&local->sta_bss_lock); | |
2644 | list_move_tail(&bss->list, &local->sta_bss_list); | |
2645 | spin_unlock_bh(&local->sta_bss_lock); | |
2646 | #endif | |
2647 | } | |
2648 | ||
5628221c | 2649 | /* save the ERP value so that it is available at association time */ |
ae6a44e3 EK |
2650 | if (elems->erp_info && elems->erp_info_len >= 1) { |
2651 | bss->erp_value = elems->erp_info[0]; | |
5628221c DD |
2652 | bss->has_erp_value = 1; |
2653 | } | |
2654 | ||
f0706e82 JB |
2655 | bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int); |
2656 | bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info); | |
f0706e82 | 2657 | |
98f7dfd8 EG |
2658 | if (elems->tim) { |
2659 | struct ieee80211_tim_ie *tim_ie = | |
2660 | (struct ieee80211_tim_ie *)elems->tim; | |
2661 | bss->dtim_period = tim_ie->dtim_period; | |
2662 | } | |
2663 | ||
2664 | /* set default value for buggy APs */ | |
2665 | if (!elems->tim || bss->dtim_period == 0) | |
2666 | bss->dtim_period = 1; | |
2667 | ||
f0706e82 | 2668 | bss->supp_rates_len = 0; |
ae6a44e3 | 2669 | if (elems->supp_rates) { |
f0706e82 | 2670 | clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len; |
ae6a44e3 EK |
2671 | if (clen > elems->supp_rates_len) |
2672 | clen = elems->supp_rates_len; | |
2673 | memcpy(&bss->supp_rates[bss->supp_rates_len], elems->supp_rates, | |
f0706e82 JB |
2674 | clen); |
2675 | bss->supp_rates_len += clen; | |
2676 | } | |
ae6a44e3 | 2677 | if (elems->ext_supp_rates) { |
f0706e82 | 2678 | clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len; |
ae6a44e3 EK |
2679 | if (clen > elems->ext_supp_rates_len) |
2680 | clen = elems->ext_supp_rates_len; | |
f0706e82 | 2681 | memcpy(&bss->supp_rates[bss->supp_rates_len], |
ae6a44e3 | 2682 | elems->ext_supp_rates, clen); |
f0706e82 JB |
2683 | bss->supp_rates_len += clen; |
2684 | } | |
2685 | ||
30b89b0f JB |
2686 | bss->band = rx_status->band; |
2687 | ||
2688 | bss->timestamp = beacon_timestamp; | |
2689 | bss->last_update = jiffies; | |
30b89b0f JB |
2690 | bss->signal = rx_status->signal; |
2691 | bss->noise = rx_status->noise; | |
566bfe5a | 2692 | bss->qual = rx_status->qual; |
9859b81e RR |
2693 | if (!beacon) |
2694 | bss->last_probe_resp = jiffies; | |
30b89b0f JB |
2695 | /* |
2696 | * In STA mode, the remaining parameters should not be overridden | |
2697 | * by beacons because they're not necessarily accurate there. | |
2698 | */ | |
2699 | if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS && | |
9859b81e | 2700 | bss->last_probe_resp && beacon) { |
3e122be0 | 2701 | ieee80211_rx_bss_put(local, bss); |
30b89b0f JB |
2702 | return; |
2703 | } | |
2704 | ||
43ac2ca3 JM |
2705 | if (bss->ies == NULL || bss->ies_len < elems->total_len) { |
2706 | kfree(bss->ies); | |
2707 | bss->ies = kmalloc(elems->total_len, GFP_ATOMIC); | |
f0706e82 | 2708 | } |
43ac2ca3 JM |
2709 | if (bss->ies) { |
2710 | memcpy(bss->ies, elems->ie_start, elems->total_len); | |
2711 | bss->ies_len = elems->total_len; | |
2712 | } else | |
2713 | bss->ies_len = 0; | |
f0706e82 | 2714 | |
43ac2ca3 | 2715 | bss->wmm_used = elems->wmm_param || elems->wmm_info; |
9d9bf77d BR |
2716 | |
2717 | /* check if we need to merge IBSS */ | |
2718 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon && | |
2719 | !local->sta_sw_scanning && !local->sta_hw_scanning && | |
fba4a1e6 | 2720 | bss->capability & WLAN_CAPABILITY_IBSS && |
9d9bf77d | 2721 | bss->freq == local->oper_channel->center_freq && |
ae6a44e3 EK |
2722 | elems->ssid_len == sdata->u.sta.ssid_len && |
2723 | memcmp(elems->ssid, sdata->u.sta.ssid, | |
2724 | sdata->u.sta.ssid_len) == 0) { | |
9d9bf77d BR |
2725 | if (rx_status->flag & RX_FLAG_TSFT) { |
2726 | /* in order for correct IBSS merging we need mactime | |
2727 | * | |
2728 | * since mactime is defined as the time the first data | |
2729 | * symbol of the frame hits the PHY, and the timestamp | |
2730 | * of the beacon is defined as "the time that the data | |
2731 | * symbol containing the first bit of the timestamp is | |
2732 | * transmitted to the PHY plus the transmitting STA’s | |
2733 | * delays through its local PHY from the MAC-PHY | |
2734 | * interface to its interface with the WM" | |
2735 | * (802.11 11.1.2) - equals the time this bit arrives at | |
2736 | * the receiver - we have to take into account the | |
2737 | * offset between the two. | |
2738 | * e.g: at 1 MBit that means mactime is 192 usec earlier | |
2739 | * (=24 bytes * 8 usecs/byte) than the beacon timestamp. | |
2740 | */ | |
2741 | int rate = local->hw.wiphy->bands[rx_status->band]-> | |
2742 | bitrates[rx_status->rate_idx].bitrate; | |
2743 | rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate); | |
2744 | } else if (local && local->ops && local->ops->get_tsf) | |
2745 | /* second best option: get current TSF */ | |
2746 | rx_timestamp = local->ops->get_tsf(local_to_hw(local)); | |
2747 | else | |
2748 | /* can't merge without knowing the TSF */ | |
2749 | rx_timestamp = -1LLU; | |
2750 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
2751 | printk(KERN_DEBUG "RX beacon SA=%s BSSID=" | |
2752 | "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n", | |
2753 | print_mac(mac, mgmt->sa), | |
2754 | print_mac(mac2, mgmt->bssid), | |
2755 | (unsigned long long)rx_timestamp, | |
2756 | (unsigned long long)beacon_timestamp, | |
2757 | (unsigned long long)(rx_timestamp - beacon_timestamp), | |
2758 | jiffies); | |
2759 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
2760 | if (beacon_timestamp > rx_timestamp) { | |
576fdeae | 2761 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
f4ea83dd JB |
2762 | printk(KERN_DEBUG "%s: beacon TSF higher than " |
2763 | "local TSF - IBSS merge with BSSID %s\n", | |
f698d856 | 2764 | sdata->dev->name, print_mac(mac, mgmt->bssid)); |
fba4a1e6 | 2765 | #endif |
f698d856 JBG |
2766 | ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss); |
2767 | ieee80211_ibss_add_sta(sdata, NULL, | |
87291c02 VK |
2768 | mgmt->bssid, mgmt->sa, |
2769 | BIT(rx_status->rate_idx)); | |
9d9bf77d BR |
2770 | } |
2771 | } | |
2772 | ||
3e122be0 | 2773 | ieee80211_rx_bss_put(local, bss); |
f0706e82 JB |
2774 | } |
2775 | ||
2776 | ||
f698d856 | 2777 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2778 | struct ieee80211_mgmt *mgmt, |
2779 | size_t len, | |
2780 | struct ieee80211_rx_status *rx_status) | |
2781 | { | |
ae6a44e3 EK |
2782 | size_t baselen; |
2783 | struct ieee802_11_elems elems; | |
9859b81e | 2784 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
ae6a44e3 | 2785 | |
8e7cdbb6 TW |
2786 | if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN)) |
2787 | return; /* ignore ProbeResp to foreign address */ | |
2788 | ||
ae6a44e3 EK |
2789 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
2790 | if (baselen > len) | |
2791 | return; | |
2792 | ||
2793 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
2794 | &elems); | |
2795 | ||
9859b81e RR |
2796 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); |
2797 | ||
2798 | /* direct probe may be part of the association flow */ | |
2799 | if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE, | |
2800 | &ifsta->request)) { | |
2801 | printk(KERN_DEBUG "%s direct probe responded\n", | |
2802 | sdata->dev->name); | |
2803 | ieee80211_authenticate(sdata, ifsta); | |
2804 | } | |
f0706e82 JB |
2805 | } |
2806 | ||
2807 | ||
f698d856 | 2808 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2809 | struct ieee80211_mgmt *mgmt, |
2810 | size_t len, | |
2811 | struct ieee80211_rx_status *rx_status) | |
2812 | { | |
f0706e82 | 2813 | struct ieee80211_if_sta *ifsta; |
f0706e82 JB |
2814 | size_t baselen; |
2815 | struct ieee802_11_elems elems; | |
f698d856 | 2816 | struct ieee80211_local *local = sdata->local; |
d3c990fb | 2817 | struct ieee80211_conf *conf = &local->hw.conf; |
471b3efd | 2818 | u32 changed = 0; |
f0706e82 | 2819 | |
ae6a44e3 EK |
2820 | /* Process beacon from the current BSS */ |
2821 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
2822 | if (baselen > len) | |
2823 | return; | |
2824 | ||
2825 | ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems); | |
2826 | ||
9859b81e | 2827 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); |
f0706e82 | 2828 | |
51fb61e7 | 2829 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
f0706e82 JB |
2830 | return; |
2831 | ifsta = &sdata->u.sta; | |
2832 | ||
d6f2da5b | 2833 | if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) || |
f0706e82 JB |
2834 | memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) |
2835 | return; | |
2836 | ||
f698d856 | 2837 | ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param, |
3434fbd3 | 2838 | elems.wmm_param_len); |
d18ef29f RC |
2839 | |
2840 | /* Do not send changes to driver if we are scanning. This removes | |
2841 | * requirement that driver's bss_info_changed function needs to be | |
2842 | * atomic. */ | |
2843 | if (local->sta_sw_scanning || local->sta_hw_scanning) | |
2844 | return; | |
2845 | ||
5628221c | 2846 | if (elems.erp_info && elems.erp_info_len >= 1) |
471b3efd | 2847 | changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]); |
50c4afb9 JL |
2848 | else { |
2849 | u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info); | |
2850 | changed |= ieee80211_handle_protect_preamb(sdata, false, | |
2851 | (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0); | |
2852 | } | |
f0706e82 | 2853 | |
d3c990fb | 2854 | if (elems.ht_cap_elem && elems.ht_info_elem && |
38668c05 | 2855 | elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) { |
d3c990fb RR |
2856 | struct ieee80211_ht_bss_info bss_info; |
2857 | ||
2858 | ieee80211_ht_addt_info_ie_to_ht_bss_info( | |
2859 | (struct ieee80211_ht_addt_info *) | |
2860 | elems.ht_info_elem, &bss_info); | |
38668c05 TW |
2861 | changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf, |
2862 | &bss_info); | |
d3c990fb RR |
2863 | } |
2864 | ||
471b3efd | 2865 | ieee80211_bss_info_change_notify(sdata, changed); |
f0706e82 JB |
2866 | } |
2867 | ||
2868 | ||
f698d856 | 2869 | static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2870 | struct ieee80211_if_sta *ifsta, |
2871 | struct ieee80211_mgmt *mgmt, | |
2872 | size_t len, | |
2873 | struct ieee80211_rx_status *rx_status) | |
2874 | { | |
f698d856 | 2875 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
2876 | int tx_last_beacon; |
2877 | struct sk_buff *skb; | |
2878 | struct ieee80211_mgmt *resp; | |
2879 | u8 *pos, *end; | |
0795af57 JP |
2880 | DECLARE_MAC_BUF(mac); |
2881 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
2882 | DECLARE_MAC_BUF(mac2); | |
2883 | DECLARE_MAC_BUF(mac3); | |
2884 | #endif | |
f0706e82 | 2885 | |
51fb61e7 | 2886 | if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS || |
48c2fc59 | 2887 | ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED || |
f0706e82 JB |
2888 | len < 24 + 2 || !ifsta->probe_resp) |
2889 | return; | |
2890 | ||
2891 | if (local->ops->tx_last_beacon) | |
2892 | tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local)); | |
2893 | else | |
2894 | tx_last_beacon = 1; | |
2895 | ||
2896 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0795af57 JP |
2897 | printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID=" |
2898 | "%s (tx_last_beacon=%d)\n", | |
f698d856 | 2899 | sdata->dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da), |
0795af57 | 2900 | print_mac(mac3, mgmt->bssid), tx_last_beacon); |
f0706e82 JB |
2901 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
2902 | ||
2903 | if (!tx_last_beacon) | |
2904 | return; | |
2905 | ||
2906 | if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 && | |
2907 | memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0) | |
2908 | return; | |
2909 | ||
2910 | end = ((u8 *) mgmt) + len; | |
2911 | pos = mgmt->u.probe_req.variable; | |
2912 | if (pos[0] != WLAN_EID_SSID || | |
2913 | pos + 2 + pos[1] > end) { | |
f4ea83dd JB |
2914 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
2915 | printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq " | |
2916 | "from %s\n", | |
f698d856 | 2917 | sdata->dev->name, print_mac(mac, mgmt->sa)); |
f4ea83dd | 2918 | #endif |
f0706e82 JB |
2919 | return; |
2920 | } | |
2921 | if (pos[1] != 0 && | |
2922 | (pos[1] != ifsta->ssid_len || | |
2923 | memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) { | |
2924 | /* Ignore ProbeReq for foreign SSID */ | |
2925 | return; | |
2926 | } | |
2927 | ||
2928 | /* Reply with ProbeResp */ | |
0ec0b7ac | 2929 | skb = skb_copy(ifsta->probe_resp, GFP_KERNEL); |
f0706e82 JB |
2930 | if (!skb) |
2931 | return; | |
2932 | ||
2933 | resp = (struct ieee80211_mgmt *) skb->data; | |
2934 | memcpy(resp->da, mgmt->sa, ETH_ALEN); | |
2935 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0795af57 | 2936 | printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n", |
f698d856 | 2937 | sdata->dev->name, print_mac(mac, resp->da)); |
f0706e82 | 2938 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
f698d856 | 2939 | ieee80211_sta_tx(sdata, skb, 0); |
f0706e82 JB |
2940 | } |
2941 | ||
f698d856 | 2942 | static void ieee80211_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, |
4e20cb29 JB |
2943 | struct ieee80211_if_sta *ifsta, |
2944 | struct ieee80211_mgmt *mgmt, | |
f709fc69 LCC |
2945 | size_t len, |
2946 | struct ieee80211_rx_status *rx_status) | |
9f985b0e | 2947 | { |
f698d856 | 2948 | struct ieee80211_local *local = sdata->local; |
f709fc69 | 2949 | |
9f985b0e RR |
2950 | if (len < IEEE80211_MIN_ACTION_SIZE) |
2951 | return; | |
2952 | ||
2953 | switch (mgmt->u.action.category) { | |
b6623486 AK |
2954 | case WLAN_CATEGORY_SPECTRUM_MGMT: |
2955 | if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ) | |
2956 | break; | |
2957 | switch (mgmt->u.action.u.chan_switch.action_code) { | |
2958 | case WLAN_ACTION_SPCT_MSR_REQ: | |
2959 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2960 | sizeof(mgmt->u.action.u.measurement))) | |
2961 | break; | |
f698d856 | 2962 | ieee80211_sta_process_measurement_req(sdata, mgmt, len); |
b6623486 AK |
2963 | break; |
2964 | } | |
2965 | break; | |
9f985b0e RR |
2966 | case WLAN_CATEGORY_BACK: |
2967 | switch (mgmt->u.action.u.addba_req.action_code) { | |
2968 | case WLAN_ACTION_ADDBA_REQ: | |
2969 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2970 | sizeof(mgmt->u.action.u.addba_req))) | |
2971 | break; | |
f698d856 | 2972 | ieee80211_sta_process_addba_request(local, mgmt, len); |
9f985b0e | 2973 | break; |
eadc8d9e RR |
2974 | case WLAN_ACTION_ADDBA_RESP: |
2975 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2976 | sizeof(mgmt->u.action.u.addba_resp))) | |
2977 | break; | |
f698d856 | 2978 | ieee80211_sta_process_addba_resp(local, mgmt, len); |
eadc8d9e | 2979 | break; |
688b88a4 RR |
2980 | case WLAN_ACTION_DELBA: |
2981 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2982 | sizeof(mgmt->u.action.u.delba))) | |
2983 | break; | |
f698d856 | 2984 | ieee80211_sta_process_delba(sdata, mgmt, len); |
688b88a4 | 2985 | break; |
9f985b0e RR |
2986 | } |
2987 | break; | |
f709fc69 | 2988 | case PLINK_CATEGORY: |
902acc78 | 2989 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
f698d856 | 2990 | mesh_rx_plink_frame(sdata, mgmt, len, rx_status); |
f709fc69 | 2991 | break; |
f709fc69 | 2992 | case MESH_PATH_SEL_CATEGORY: |
902acc78 | 2993 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
f698d856 | 2994 | mesh_rx_path_sel_frame(sdata, mgmt, len); |
f709fc69 | 2995 | break; |
9f985b0e RR |
2996 | } |
2997 | } | |
f0706e82 | 2998 | |
f698d856 | 2999 | void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, |
f0706e82 JB |
3000 | struct ieee80211_rx_status *rx_status) |
3001 | { | |
f698d856 | 3002 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
3003 | struct ieee80211_if_sta *ifsta; |
3004 | struct ieee80211_mgmt *mgmt; | |
3005 | u16 fc; | |
3006 | ||
3007 | if (skb->len < 24) | |
3008 | goto fail; | |
3009 | ||
f0706e82 JB |
3010 | ifsta = &sdata->u.sta; |
3011 | ||
3012 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
3013 | fc = le16_to_cpu(mgmt->frame_control); | |
3014 | ||
3015 | switch (fc & IEEE80211_FCTL_STYPE) { | |
3016 | case IEEE80211_STYPE_PROBE_REQ: | |
3017 | case IEEE80211_STYPE_PROBE_RESP: | |
3018 | case IEEE80211_STYPE_BEACON: | |
f709fc69 | 3019 | case IEEE80211_STYPE_ACTION: |
f0706e82 JB |
3020 | memcpy(skb->cb, rx_status, sizeof(*rx_status)); |
3021 | case IEEE80211_STYPE_AUTH: | |
3022 | case IEEE80211_STYPE_ASSOC_RESP: | |
3023 | case IEEE80211_STYPE_REASSOC_RESP: | |
3024 | case IEEE80211_STYPE_DEAUTH: | |
3025 | case IEEE80211_STYPE_DISASSOC: | |
3026 | skb_queue_tail(&ifsta->skb_queue, skb); | |
3027 | queue_work(local->hw.workqueue, &ifsta->work); | |
3028 | return; | |
f0706e82 JB |
3029 | } |
3030 | ||
3031 | fail: | |
3032 | kfree_skb(skb); | |
3033 | } | |
3034 | ||
3035 | ||
f698d856 | 3036 | static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
3037 | struct sk_buff *skb) |
3038 | { | |
3039 | struct ieee80211_rx_status *rx_status; | |
f0706e82 JB |
3040 | struct ieee80211_if_sta *ifsta; |
3041 | struct ieee80211_mgmt *mgmt; | |
3042 | u16 fc; | |
3043 | ||
f0706e82 JB |
3044 | ifsta = &sdata->u.sta; |
3045 | ||
3046 | rx_status = (struct ieee80211_rx_status *) skb->cb; | |
3047 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
3048 | fc = le16_to_cpu(mgmt->frame_control); | |
3049 | ||
3050 | switch (fc & IEEE80211_FCTL_STYPE) { | |
3051 | case IEEE80211_STYPE_PROBE_REQ: | |
f698d856 | 3052 | ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len, |
f0706e82 JB |
3053 | rx_status); |
3054 | break; | |
3055 | case IEEE80211_STYPE_PROBE_RESP: | |
f698d856 | 3056 | ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status); |
f0706e82 JB |
3057 | break; |
3058 | case IEEE80211_STYPE_BEACON: | |
f698d856 | 3059 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); |
f0706e82 JB |
3060 | break; |
3061 | case IEEE80211_STYPE_AUTH: | |
f698d856 | 3062 | ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len); |
f0706e82 JB |
3063 | break; |
3064 | case IEEE80211_STYPE_ASSOC_RESP: | |
471b3efd | 3065 | ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0); |
f0706e82 JB |
3066 | break; |
3067 | case IEEE80211_STYPE_REASSOC_RESP: | |
471b3efd | 3068 | ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1); |
f0706e82 JB |
3069 | break; |
3070 | case IEEE80211_STYPE_DEAUTH: | |
f698d856 | 3071 | ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len); |
f0706e82 JB |
3072 | break; |
3073 | case IEEE80211_STYPE_DISASSOC: | |
f698d856 | 3074 | ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len); |
f0706e82 | 3075 | break; |
9f985b0e | 3076 | case IEEE80211_STYPE_ACTION: |
f698d856 | 3077 | ieee80211_rx_mgmt_action(sdata, ifsta, mgmt, skb->len, rx_status); |
9f985b0e | 3078 | break; |
f0706e82 JB |
3079 | } |
3080 | ||
3081 | kfree_skb(skb); | |
3082 | } | |
3083 | ||
3084 | ||
9ae54c84 | 3085 | ieee80211_rx_result |
f698d856 | 3086 | ieee80211_sta_rx_scan(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, |
ece8eddd | 3087 | struct ieee80211_rx_status *rx_status) |
f0706e82 JB |
3088 | { |
3089 | struct ieee80211_mgmt *mgmt; | |
4e3996fe | 3090 | __le16 fc; |
f0706e82 | 3091 | |
ece8eddd | 3092 | if (skb->len < 2) |
e4c26add | 3093 | return RX_DROP_UNUSABLE; |
f0706e82 JB |
3094 | |
3095 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
4e3996fe | 3096 | fc = mgmt->frame_control; |
f0706e82 | 3097 | |
4e3996fe | 3098 | if (ieee80211_is_ctl(fc)) |
9ae54c84 | 3099 | return RX_CONTINUE; |
ece8eddd ZY |
3100 | |
3101 | if (skb->len < 24) | |
e4c26add | 3102 | return RX_DROP_MONITOR; |
ece8eddd | 3103 | |
4e3996fe | 3104 | if (ieee80211_is_probe_resp(fc)) { |
f698d856 | 3105 | ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status); |
4e3996fe HH |
3106 | dev_kfree_skb(skb); |
3107 | return RX_QUEUED; | |
f0706e82 | 3108 | } |
4e3996fe HH |
3109 | |
3110 | if (ieee80211_is_beacon(fc)) { | |
f698d856 | 3111 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); |
4e3996fe HH |
3112 | dev_kfree_skb(skb); |
3113 | return RX_QUEUED; | |
3114 | } | |
3115 | ||
9ae54c84 | 3116 | return RX_CONTINUE; |
f0706e82 JB |
3117 | } |
3118 | ||
3119 | ||
f698d856 | 3120 | static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 3121 | { |
f698d856 | 3122 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
3123 | int active = 0; |
3124 | struct sta_info *sta; | |
3125 | ||
d0709a65 JB |
3126 | rcu_read_lock(); |
3127 | ||
3128 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
3129 | if (sta->sdata == sdata && | |
f0706e82 JB |
3130 | time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL, |
3131 | jiffies)) { | |
3132 | active++; | |
3133 | break; | |
3134 | } | |
3135 | } | |
d0709a65 JB |
3136 | |
3137 | rcu_read_unlock(); | |
f0706e82 JB |
3138 | |
3139 | return active; | |
3140 | } | |
3141 | ||
3142 | ||
f698d856 | 3143 | static void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, unsigned long exp_time) |
f0706e82 | 3144 | { |
f698d856 | 3145 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 3146 | struct sta_info *sta, *tmp; |
be8755e1 | 3147 | LIST_HEAD(tmp_list); |
0795af57 | 3148 | DECLARE_MAC_BUF(mac); |
d0709a65 | 3149 | unsigned long flags; |
f0706e82 | 3150 | |
d0709a65 | 3151 | spin_lock_irqsave(&local->sta_lock, flags); |
f0706e82 | 3152 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) |
f709fc69 | 3153 | if (time_after(jiffies, sta->last_rx + exp_time)) { |
f4ea83dd | 3154 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
0795af57 | 3155 | printk(KERN_DEBUG "%s: expiring inactive STA %s\n", |
f698d856 | 3156 | sdata->dev->name, print_mac(mac, sta->addr)); |
f4ea83dd | 3157 | #endif |
cb585bcc | 3158 | __sta_info_unlink(&sta); |
d0709a65 JB |
3159 | if (sta) |
3160 | list_add(&sta->list, &tmp_list); | |
f0706e82 | 3161 | } |
d0709a65 | 3162 | spin_unlock_irqrestore(&local->sta_lock, flags); |
be8755e1 | 3163 | |
d0709a65 JB |
3164 | list_for_each_entry_safe(sta, tmp, &tmp_list, list) |
3165 | sta_info_destroy(sta); | |
f0706e82 JB |
3166 | } |
3167 | ||
3168 | ||
f698d856 | 3169 | static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
3170 | struct ieee80211_if_sta *ifsta) |
3171 | { | |
3172 | mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); | |
3173 | ||
f698d856 JBG |
3174 | ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT); |
3175 | if (ieee80211_sta_active_ibss(sdata)) | |
f0706e82 JB |
3176 | return; |
3177 | ||
3178 | printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other " | |
f698d856 JBG |
3179 | "IBSS networks with same SSID (merge)\n", sdata->dev->name); |
3180 | ieee80211_sta_req_scan(sdata, ifsta->ssid, ifsta->ssid_len); | |
f0706e82 JB |
3181 | } |
3182 | ||
3183 | ||
f709fc69 | 3184 | #ifdef CONFIG_MAC80211_MESH |
f698d856 | 3185 | static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata, |
f709fc69 LCC |
3186 | struct ieee80211_if_sta *ifsta) |
3187 | { | |
f709fc69 LCC |
3188 | bool free_plinks; |
3189 | ||
f698d856 JBG |
3190 | ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT); |
3191 | mesh_path_expire(sdata); | |
f709fc69 LCC |
3192 | |
3193 | free_plinks = mesh_plink_availables(sdata); | |
3194 | if (free_plinks != sdata->u.sta.accepting_plinks) | |
9d139c81 | 3195 | ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON); |
f709fc69 LCC |
3196 | |
3197 | mod_timer(&ifsta->timer, jiffies + | |
3198 | IEEE80211_MESH_HOUSEKEEPING_INTERVAL); | |
3199 | } | |
3200 | ||
3201 | ||
f698d856 | 3202 | void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) |
f709fc69 LCC |
3203 | { |
3204 | struct ieee80211_if_sta *ifsta; | |
f709fc69 | 3205 | ifsta = &sdata->u.sta; |
48c2fc59 | 3206 | ifsta->state = IEEE80211_STA_MLME_MESH_UP; |
f709fc69 | 3207 | ieee80211_sta_timer((unsigned long)sdata); |
56a6d13d | 3208 | ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON); |
f709fc69 LCC |
3209 | } |
3210 | #endif | |
3211 | ||
3212 | ||
f0706e82 JB |
3213 | void ieee80211_sta_timer(unsigned long data) |
3214 | { | |
3215 | struct ieee80211_sub_if_data *sdata = | |
3216 | (struct ieee80211_sub_if_data *) data; | |
3217 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
f698d856 | 3218 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
3219 | |
3220 | set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); | |
3221 | queue_work(local->hw.workqueue, &ifsta->work); | |
3222 | } | |
3223 | ||
f0706e82 JB |
3224 | void ieee80211_sta_work(struct work_struct *work) |
3225 | { | |
3226 | struct ieee80211_sub_if_data *sdata = | |
3227 | container_of(work, struct ieee80211_sub_if_data, u.sta.work); | |
f698d856 | 3228 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
3229 | struct ieee80211_if_sta *ifsta; |
3230 | struct sk_buff *skb; | |
3231 | ||
f698d856 | 3232 | if (!netif_running(sdata->dev)) |
f0706e82 JB |
3233 | return; |
3234 | ||
ece8eddd | 3235 | if (local->sta_sw_scanning || local->sta_hw_scanning) |
f0706e82 JB |
3236 | return; |
3237 | ||
f4ea83dd JB |
3238 | if (WARN_ON(sdata->vif.type != IEEE80211_IF_TYPE_STA && |
3239 | sdata->vif.type != IEEE80211_IF_TYPE_IBSS && | |
3240 | sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT)) | |
f0706e82 | 3241 | return; |
f0706e82 JB |
3242 | ifsta = &sdata->u.sta; |
3243 | ||
3244 | while ((skb = skb_dequeue(&ifsta->skb_queue))) | |
f698d856 | 3245 | ieee80211_sta_rx_queued_mgmt(sdata, skb); |
f0706e82 | 3246 | |
f709fc69 | 3247 | #ifdef CONFIG_MAC80211_MESH |
902acc78 JB |
3248 | if (ifsta->preq_queue_len && |
3249 | time_after(jiffies, | |
3250 | ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval))) | |
f698d856 | 3251 | mesh_path_start_discovery(sdata); |
f709fc69 LCC |
3252 | #endif |
3253 | ||
9859b81e RR |
3254 | if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE && |
3255 | ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE && | |
48c2fc59 | 3256 | ifsta->state != IEEE80211_STA_MLME_ASSOCIATE && |
f0706e82 | 3257 | test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) { |
a0af5f14 | 3258 | if (ifsta->scan_ssid_len) |
f698d856 | 3259 | ieee80211_sta_start_scan(sdata, ifsta->scan_ssid, ifsta->scan_ssid_len); |
a0af5f14 | 3260 | else |
f698d856 | 3261 | ieee80211_sta_start_scan(sdata, NULL, 0); |
f0706e82 JB |
3262 | return; |
3263 | } | |
3264 | ||
3265 | if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) { | |
f698d856 | 3266 | if (ieee80211_sta_config_auth(sdata, ifsta)) |
f0706e82 JB |
3267 | return; |
3268 | clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); | |
3269 | } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request)) | |
3270 | return; | |
3271 | ||
3272 | switch (ifsta->state) { | |
48c2fc59 | 3273 | case IEEE80211_STA_MLME_DISABLED: |
f0706e82 | 3274 | break; |
9859b81e RR |
3275 | case IEEE80211_STA_MLME_DIRECT_PROBE: |
3276 | ieee80211_direct_probe(sdata, ifsta); | |
3277 | break; | |
48c2fc59 | 3278 | case IEEE80211_STA_MLME_AUTHENTICATE: |
f698d856 | 3279 | ieee80211_authenticate(sdata, ifsta); |
f0706e82 | 3280 | break; |
48c2fc59 | 3281 | case IEEE80211_STA_MLME_ASSOCIATE: |
f698d856 | 3282 | ieee80211_associate(sdata, ifsta); |
f0706e82 | 3283 | break; |
48c2fc59 | 3284 | case IEEE80211_STA_MLME_ASSOCIATED: |
f698d856 | 3285 | ieee80211_associated(sdata, ifsta); |
f0706e82 | 3286 | break; |
48c2fc59 | 3287 | case IEEE80211_STA_MLME_IBSS_SEARCH: |
f698d856 | 3288 | ieee80211_sta_find_ibss(sdata, ifsta); |
f0706e82 | 3289 | break; |
48c2fc59 | 3290 | case IEEE80211_STA_MLME_IBSS_JOINED: |
f698d856 | 3291 | ieee80211_sta_merge_ibss(sdata, ifsta); |
f0706e82 | 3292 | break; |
f709fc69 | 3293 | #ifdef CONFIG_MAC80211_MESH |
48c2fc59 | 3294 | case IEEE80211_STA_MLME_MESH_UP: |
f698d856 | 3295 | ieee80211_mesh_housekeeping(sdata, ifsta); |
f709fc69 LCC |
3296 | break; |
3297 | #endif | |
f0706e82 | 3298 | default: |
f4ea83dd | 3299 | WARN_ON(1); |
f0706e82 JB |
3300 | break; |
3301 | } | |
3302 | ||
f698d856 | 3303 | if (ieee80211_privacy_mismatch(sdata, ifsta)) { |
f0706e82 | 3304 | printk(KERN_DEBUG "%s: privacy configuration mismatch and " |
f698d856 | 3305 | "mixed-cell disabled - disassociate\n", sdata->dev->name); |
f0706e82 | 3306 | |
f698d856 JBG |
3307 | ieee80211_send_disassoc(sdata, ifsta, WLAN_REASON_UNSPECIFIED); |
3308 | ieee80211_set_disassoc(sdata, ifsta, 0); | |
f0706e82 JB |
3309 | } |
3310 | } | |
3311 | ||
3312 | ||
f698d856 | 3313 | static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
3314 | struct ieee80211_if_sta *ifsta) |
3315 | { | |
f698d856 | 3316 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
3317 | |
3318 | if (local->ops->reset_tsf) { | |
3319 | /* Reset own TSF to allow time synchronization work. */ | |
3320 | local->ops->reset_tsf(local_to_hw(local)); | |
3321 | } | |
3322 | ||
3323 | ifsta->wmm_last_param_set = -1; /* allow any WMM update */ | |
3324 | ||
3325 | ||
3326 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
3327 | ifsta->auth_alg = WLAN_AUTH_OPEN; | |
3328 | else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
3329 | ifsta->auth_alg = WLAN_AUTH_SHARED_KEY; | |
3330 | else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
3331 | ifsta->auth_alg = WLAN_AUTH_LEAP; | |
3332 | else | |
3333 | ifsta->auth_alg = WLAN_AUTH_OPEN; | |
f0706e82 | 3334 | ifsta->auth_transaction = -1; |
d6f2da5b | 3335 | ifsta->flags &= ~IEEE80211_STA_ASSOCIATED; |
6042a3e3 | 3336 | ifsta->assoc_scan_tries = 0; |
9859b81e | 3337 | ifsta->direct_probe_tries = 0; |
6042a3e3 RR |
3338 | ifsta->auth_tries = 0; |
3339 | ifsta->assoc_tries = 0; | |
f698d856 | 3340 | netif_carrier_off(sdata->dev); |
f0706e82 JB |
3341 | } |
3342 | ||
3343 | ||
f698d856 | 3344 | void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
3345 | struct ieee80211_if_sta *ifsta) |
3346 | { | |
f698d856 | 3347 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 3348 | |
51fb61e7 | 3349 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
f0706e82 JB |
3350 | return; |
3351 | ||
d6f2da5b JS |
3352 | if ((ifsta->flags & (IEEE80211_STA_BSSID_SET | |
3353 | IEEE80211_STA_AUTO_BSSID_SEL)) && | |
3354 | (ifsta->flags & (IEEE80211_STA_SSID_SET | | |
3355 | IEEE80211_STA_AUTO_SSID_SEL))) { | |
f0706e82 JB |
3356 | set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); |
3357 | queue_work(local->hw.workqueue, &ifsta->work); | |
3358 | } | |
3359 | } | |
3360 | ||
3361 | static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta, | |
3362 | const char *ssid, int ssid_len) | |
3363 | { | |
3364 | int tmp, hidden_ssid; | |
3365 | ||
48225709 MW |
3366 | if (ssid_len == ifsta->ssid_len && |
3367 | !memcmp(ifsta->ssid, ssid, ssid_len)) | |
f0706e82 JB |
3368 | return 1; |
3369 | ||
d6f2da5b | 3370 | if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) |
f0706e82 JB |
3371 | return 0; |
3372 | ||
3373 | hidden_ssid = 1; | |
3374 | tmp = ssid_len; | |
3375 | while (tmp--) { | |
3376 | if (ssid[tmp] != '\0') { | |
3377 | hidden_ssid = 0; | |
3378 | break; | |
3379 | } | |
3380 | } | |
3381 | ||
3382 | if (hidden_ssid && ifsta->ssid_len == ssid_len) | |
3383 | return 1; | |
3384 | ||
3385 | if (ssid_len == 1 && ssid[0] == ' ') | |
3386 | return 1; | |
3387 | ||
3388 | return 0; | |
3389 | } | |
3390 | ||
f698d856 | 3391 | static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
3392 | struct ieee80211_if_sta *ifsta) |
3393 | { | |
f698d856 | 3394 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
3395 | struct ieee80211_sta_bss *bss, *selected = NULL; |
3396 | int top_rssi = 0, freq; | |
3397 | ||
f0706e82 | 3398 | spin_lock_bh(&local->sta_bss_lock); |
8318d78a | 3399 | freq = local->oper_channel->center_freq; |
f0706e82 JB |
3400 | list_for_each_entry(bss, &local->sta_bss_list, list) { |
3401 | if (!(bss->capability & WLAN_CAPABILITY_ESS)) | |
3402 | continue; | |
3403 | ||
34a961f7 AK |
3404 | if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL | |
3405 | IEEE80211_STA_AUTO_BSSID_SEL | | |
3406 | IEEE80211_STA_AUTO_CHANNEL_SEL)) && | |
3407 | (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^ | |
3408 | !!sdata->default_key)) | |
f0706e82 JB |
3409 | continue; |
3410 | ||
d6f2da5b JS |
3411 | if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) && |
3412 | bss->freq != freq) | |
f0706e82 JB |
3413 | continue; |
3414 | ||
d6f2da5b | 3415 | if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) && |
f0706e82 JB |
3416 | memcmp(bss->bssid, ifsta->bssid, ETH_ALEN)) |
3417 | continue; | |
3418 | ||
d6f2da5b | 3419 | if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) && |
f0706e82 JB |
3420 | !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len)) |
3421 | continue; | |
3422 | ||
566bfe5a | 3423 | if (!selected || top_rssi < bss->signal) { |
f0706e82 | 3424 | selected = bss; |
566bfe5a | 3425 | top_rssi = bss->signal; |
f0706e82 JB |
3426 | } |
3427 | } | |
3428 | if (selected) | |
3429 | atomic_inc(&selected->users); | |
3430 | spin_unlock_bh(&local->sta_bss_lock); | |
3431 | ||
3432 | if (selected) { | |
f698d856 | 3433 | ieee80211_set_freq(sdata, selected->freq); |
d6f2da5b | 3434 | if (!(ifsta->flags & IEEE80211_STA_SSID_SET)) |
f698d856 | 3435 | ieee80211_sta_set_ssid(sdata, selected->ssid, |
f0706e82 | 3436 | selected->ssid_len); |
f698d856 JBG |
3437 | ieee80211_sta_set_bssid(sdata, selected->bssid); |
3438 | ieee80211_sta_def_wmm_params(sdata, selected, 0); | |
9859b81e RR |
3439 | |
3440 | /* Send out direct probe if no probe resp was received or | |
3441 | * the one we have is outdated | |
3442 | */ | |
3443 | if (!selected->last_probe_resp || | |
3444 | time_after(jiffies, selected->last_probe_resp | |
3445 | + IEEE80211_SCAN_RESULT_EXPIRE)) | |
3446 | ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE; | |
3447 | else | |
3448 | ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE; | |
3449 | ||
3e122be0 | 3450 | ieee80211_rx_bss_put(local, selected); |
f698d856 | 3451 | ieee80211_sta_reset_auth(sdata, ifsta); |
f0706e82 JB |
3452 | return 0; |
3453 | } else { | |
6042a3e3 RR |
3454 | if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) { |
3455 | ifsta->assoc_scan_tries++; | |
d6f2da5b | 3456 | if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) |
f698d856 | 3457 | ieee80211_sta_start_scan(sdata, NULL, 0); |
b9bf1e60 | 3458 | else |
f698d856 | 3459 | ieee80211_sta_start_scan(sdata, ifsta->ssid, |
b9bf1e60 | 3460 | ifsta->ssid_len); |
48c2fc59 | 3461 | ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE; |
f0706e82 JB |
3462 | set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); |
3463 | } else | |
48c2fc59 | 3464 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
f0706e82 | 3465 | } |
f0706e82 JB |
3466 | return -1; |
3467 | } | |
3468 | ||
f0706e82 | 3469 | |
f698d856 | 3470 | static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
3471 | struct ieee80211_if_sta *ifsta) |
3472 | { | |
f698d856 | 3473 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 3474 | struct ieee80211_sta_bss *bss; |
8318d78a | 3475 | struct ieee80211_supported_band *sband; |
f0706e82 JB |
3476 | u8 bssid[ETH_ALEN], *pos; |
3477 | int i; | |
167ad6f7 | 3478 | int ret; |
0795af57 | 3479 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
3480 | |
3481 | #if 0 | |
3482 | /* Easier testing, use fixed BSSID. */ | |
3483 | memset(bssid, 0xfe, ETH_ALEN); | |
3484 | #else | |
3485 | /* Generate random, not broadcast, locally administered BSSID. Mix in | |
3486 | * own MAC address to make sure that devices that do not have proper | |
3487 | * random number generator get different BSSID. */ | |
3488 | get_random_bytes(bssid, ETH_ALEN); | |
3489 | for (i = 0; i < ETH_ALEN; i++) | |
f698d856 | 3490 | bssid[i] ^= sdata->dev->dev_addr[i]; |
f0706e82 JB |
3491 | bssid[0] &= ~0x01; |
3492 | bssid[0] |= 0x02; | |
3493 | #endif | |
3494 | ||
0795af57 | 3495 | printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n", |
f698d856 | 3496 | sdata->dev->name, print_mac(mac, bssid)); |
f0706e82 | 3497 | |
f698d856 | 3498 | bss = ieee80211_rx_bss_add(sdata, bssid, |
8318d78a | 3499 | local->hw.conf.channel->center_freq, |
cffdd30d | 3500 | sdata->u.sta.ssid, sdata->u.sta.ssid_len); |
f0706e82 JB |
3501 | if (!bss) |
3502 | return -ENOMEM; | |
3503 | ||
8318d78a JB |
3504 | bss->band = local->hw.conf.channel->band; |
3505 | sband = local->hw.wiphy->bands[bss->band]; | |
f0706e82 JB |
3506 | |
3507 | if (local->hw.conf.beacon_int == 0) | |
dc0ae30c | 3508 | local->hw.conf.beacon_int = 100; |
f0706e82 | 3509 | bss->beacon_int = local->hw.conf.beacon_int; |
f0706e82 JB |
3510 | bss->last_update = jiffies; |
3511 | bss->capability = WLAN_CAPABILITY_IBSS; | |
988c0f72 JB |
3512 | |
3513 | if (sdata->default_key) | |
f0706e82 | 3514 | bss->capability |= WLAN_CAPABILITY_PRIVACY; |
988c0f72 | 3515 | else |
f0706e82 | 3516 | sdata->drop_unencrypted = 0; |
988c0f72 | 3517 | |
8318d78a | 3518 | bss->supp_rates_len = sband->n_bitrates; |
f0706e82 | 3519 | pos = bss->supp_rates; |
8318d78a JB |
3520 | for (i = 0; i < sband->n_bitrates; i++) { |
3521 | int rate = sband->bitrates[i].bitrate; | |
f0706e82 JB |
3522 | *pos++ = (u8) (rate / 5); |
3523 | } | |
3524 | ||
f698d856 | 3525 | ret = ieee80211_sta_join_ibss(sdata, ifsta, bss); |
3e122be0 | 3526 | ieee80211_rx_bss_put(local, bss); |
167ad6f7 | 3527 | return ret; |
f0706e82 JB |
3528 | } |
3529 | ||
3530 | ||
f698d856 | 3531 | static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
3532 | struct ieee80211_if_sta *ifsta) |
3533 | { | |
f698d856 | 3534 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
3535 | struct ieee80211_sta_bss *bss; |
3536 | int found = 0; | |
3537 | u8 bssid[ETH_ALEN]; | |
3538 | int active_ibss; | |
0795af57 JP |
3539 | DECLARE_MAC_BUF(mac); |
3540 | DECLARE_MAC_BUF(mac2); | |
f0706e82 JB |
3541 | |
3542 | if (ifsta->ssid_len == 0) | |
3543 | return -EINVAL; | |
3544 | ||
f698d856 | 3545 | active_ibss = ieee80211_sta_active_ibss(sdata); |
f0706e82 JB |
3546 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
3547 | printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n", | |
f698d856 | 3548 | sdata->dev->name, active_ibss); |
f0706e82 JB |
3549 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
3550 | spin_lock_bh(&local->sta_bss_lock); | |
3551 | list_for_each_entry(bss, &local->sta_bss_list, list) { | |
3552 | if (ifsta->ssid_len != bss->ssid_len || | |
3553 | memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0 | |
3554 | || !(bss->capability & WLAN_CAPABILITY_IBSS)) | |
3555 | continue; | |
3556 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0795af57 JP |
3557 | printk(KERN_DEBUG " bssid=%s found\n", |
3558 | print_mac(mac, bss->bssid)); | |
f0706e82 JB |
3559 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
3560 | memcpy(bssid, bss->bssid, ETH_ALEN); | |
3561 | found = 1; | |
3562 | if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0) | |
3563 | break; | |
3564 | } | |
3565 | spin_unlock_bh(&local->sta_bss_lock); | |
3566 | ||
3567 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
6e43829b VK |
3568 | if (found) |
3569 | printk(KERN_DEBUG " sta_find_ibss: selected %s current " | |
3570 | "%s\n", print_mac(mac, bssid), | |
3571 | print_mac(mac2, ifsta->bssid)); | |
f0706e82 | 3572 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
80693ceb DD |
3573 | |
3574 | if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) { | |
167ad6f7 | 3575 | int ret; |
80693ceb DD |
3576 | int search_freq; |
3577 | ||
3578 | if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) | |
3579 | search_freq = bss->freq; | |
3580 | else | |
3581 | search_freq = local->hw.conf.channel->center_freq; | |
3582 | ||
f698d856 | 3583 | bss = ieee80211_rx_bss_get(local, bssid, search_freq, |
80693ceb DD |
3584 | ifsta->ssid, ifsta->ssid_len); |
3585 | if (!bss) | |
3586 | goto dont_join; | |
3587 | ||
0795af57 | 3588 | printk(KERN_DEBUG "%s: Selected IBSS BSSID %s" |
f0706e82 | 3589 | " based on configured SSID\n", |
f698d856 JBG |
3590 | sdata->dev->name, print_mac(mac, bssid)); |
3591 | ret = ieee80211_sta_join_ibss(sdata, ifsta, bss); | |
3e122be0 | 3592 | ieee80211_rx_bss_put(local, bss); |
167ad6f7 | 3593 | return ret; |
f0706e82 | 3594 | } |
80693ceb DD |
3595 | |
3596 | dont_join: | |
f0706e82 JB |
3597 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
3598 | printk(KERN_DEBUG " did not try to join ibss\n"); | |
3599 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
3600 | ||
3601 | /* Selected IBSS not found in current scan results - try to scan */ | |
48c2fc59 | 3602 | if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED && |
f698d856 | 3603 | !ieee80211_sta_active_ibss(sdata)) { |
f0706e82 JB |
3604 | mod_timer(&ifsta->timer, jiffies + |
3605 | IEEE80211_IBSS_MERGE_INTERVAL); | |
3606 | } else if (time_after(jiffies, local->last_scan_completed + | |
3607 | IEEE80211_SCAN_INTERVAL)) { | |
3608 | printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to " | |
f698d856 JBG |
3609 | "join\n", sdata->dev->name); |
3610 | return ieee80211_sta_req_scan(sdata, ifsta->ssid, | |
f0706e82 | 3611 | ifsta->ssid_len); |
48c2fc59 | 3612 | } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) { |
f0706e82 JB |
3613 | int interval = IEEE80211_SCAN_INTERVAL; |
3614 | ||
3615 | if (time_after(jiffies, ifsta->ibss_join_req + | |
3616 | IEEE80211_IBSS_JOIN_TIMEOUT)) { | |
d6f2da5b | 3617 | if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) && |
8318d78a JB |
3618 | (!(local->oper_channel->flags & |
3619 | IEEE80211_CHAN_NO_IBSS))) | |
f698d856 | 3620 | return ieee80211_sta_create_ibss(sdata, ifsta); |
d6f2da5b | 3621 | if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) { |
8318d78a | 3622 | printk(KERN_DEBUG "%s: IBSS not allowed on" |
f698d856 | 3623 | " %d MHz\n", sdata->dev->name, |
8318d78a | 3624 | local->hw.conf.channel->center_freq); |
f0706e82 JB |
3625 | } |
3626 | ||
3627 | /* No IBSS found - decrease scan interval and continue | |
3628 | * scanning. */ | |
3629 | interval = IEEE80211_SCAN_INTERVAL_SLOW; | |
3630 | } | |
3631 | ||
48c2fc59 | 3632 | ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH; |
f0706e82 JB |
3633 | mod_timer(&ifsta->timer, jiffies + interval); |
3634 | return 0; | |
3635 | } | |
3636 | ||
3637 | return 0; | |
3638 | } | |
3639 | ||
3640 | ||
f698d856 | 3641 | int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len) |
f0706e82 | 3642 | { |
f0706e82 | 3643 | struct ieee80211_if_sta *ifsta; |
9d139c81 | 3644 | int res; |
f0706e82 JB |
3645 | |
3646 | if (len > IEEE80211_MAX_SSID_LEN) | |
3647 | return -EINVAL; | |
3648 | ||
f0706e82 JB |
3649 | ifsta = &sdata->u.sta; |
3650 | ||
9d139c81 JB |
3651 | if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) { |
3652 | memset(ifsta->ssid, 0, sizeof(ifsta->ssid)); | |
3653 | memcpy(ifsta->ssid, ssid, len); | |
3654 | ifsta->ssid_len = len; | |
d6f2da5b | 3655 | ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
9d139c81 JB |
3656 | |
3657 | res = 0; | |
3658 | /* | |
3659 | * Hack! MLME code needs to be cleaned up to have different | |
3660 | * entry points for configuration and internal selection change | |
3661 | */ | |
3662 | if (netif_running(sdata->dev)) | |
3663 | res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID); | |
3664 | if (res) { | |
3665 | printk(KERN_DEBUG "%s: Failed to config new SSID to " | |
f698d856 | 3666 | "the low-level driver\n", sdata->dev->name); |
9d139c81 JB |
3667 | return res; |
3668 | } | |
3669 | } | |
f0706e82 | 3670 | |
d6f2da5b JS |
3671 | if (len) |
3672 | ifsta->flags |= IEEE80211_STA_SSID_SET; | |
3673 | else | |
3674 | ifsta->flags &= ~IEEE80211_STA_SSID_SET; | |
9d139c81 | 3675 | |
51fb61e7 | 3676 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && |
d6f2da5b | 3677 | !(ifsta->flags & IEEE80211_STA_BSSID_SET)) { |
f0706e82 | 3678 | ifsta->ibss_join_req = jiffies; |
48c2fc59 | 3679 | ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH; |
f698d856 | 3680 | return ieee80211_sta_find_ibss(sdata, ifsta); |
f0706e82 | 3681 | } |
9d139c81 | 3682 | |
f0706e82 JB |
3683 | return 0; |
3684 | } | |
3685 | ||
3686 | ||
f698d856 | 3687 | int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len) |
f0706e82 | 3688 | { |
f0706e82 JB |
3689 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
3690 | memcpy(ssid, ifsta->ssid, ifsta->ssid_len); | |
3691 | *len = ifsta->ssid_len; | |
3692 | return 0; | |
3693 | } | |
3694 | ||
3695 | ||
f698d856 | 3696 | int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid) |
f0706e82 | 3697 | { |
f0706e82 JB |
3698 | struct ieee80211_if_sta *ifsta; |
3699 | int res; | |
3700 | ||
f0706e82 JB |
3701 | ifsta = &sdata->u.sta; |
3702 | ||
3703 | if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) { | |
3704 | memcpy(ifsta->bssid, bssid, ETH_ALEN); | |
9d139c81 JB |
3705 | res = 0; |
3706 | /* | |
3707 | * Hack! See also ieee80211_sta_set_ssid. | |
3708 | */ | |
3709 | if (netif_running(sdata->dev)) | |
3710 | res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID); | |
f0706e82 JB |
3711 | if (res) { |
3712 | printk(KERN_DEBUG "%s: Failed to config new BSSID to " | |
f698d856 | 3713 | "the low-level driver\n", sdata->dev->name); |
f0706e82 JB |
3714 | return res; |
3715 | } | |
3716 | } | |
3717 | ||
d6f2da5b JS |
3718 | if (is_valid_ether_addr(bssid)) |
3719 | ifsta->flags |= IEEE80211_STA_BSSID_SET; | |
f0706e82 | 3720 | else |
d6f2da5b JS |
3721 | ifsta->flags &= ~IEEE80211_STA_BSSID_SET; |
3722 | ||
f0706e82 JB |
3723 | return 0; |
3724 | } | |
3725 | ||
3726 | ||
3727 | static void ieee80211_send_nullfunc(struct ieee80211_local *local, | |
3728 | struct ieee80211_sub_if_data *sdata, | |
3729 | int powersave) | |
3730 | { | |
3731 | struct sk_buff *skb; | |
3732 | struct ieee80211_hdr *nullfunc; | |
4e3996fe | 3733 | __le16 fc; |
f0706e82 JB |
3734 | |
3735 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24); | |
3736 | if (!skb) { | |
3737 | printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc " | |
3738 | "frame\n", sdata->dev->name); | |
3739 | return; | |
3740 | } | |
3741 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
3742 | ||
3743 | nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24); | |
3744 | memset(nullfunc, 0, 24); | |
4e3996fe HH |
3745 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | |
3746 | IEEE80211_FCTL_TODS); | |
f0706e82 | 3747 | if (powersave) |
4e3996fe HH |
3748 | fc |= cpu_to_le16(IEEE80211_FCTL_PM); |
3749 | nullfunc->frame_control = fc; | |
f0706e82 JB |
3750 | memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN); |
3751 | memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN); | |
3752 | memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN); | |
3753 | ||
f698d856 | 3754 | ieee80211_sta_tx(sdata, skb, 0); |
f0706e82 JB |
3755 | } |
3756 | ||
3757 | ||
69d3b6f4 JB |
3758 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
3759 | { | |
3760 | if (sdata->vif.type == IEEE80211_IF_TYPE_STA || | |
3761 | ieee80211_vif_is_mesh(&sdata->vif)) | |
3762 | ieee80211_sta_timer((unsigned long)sdata); | |
3763 | } | |
3764 | ||
f0706e82 JB |
3765 | void ieee80211_scan_completed(struct ieee80211_hw *hw) |
3766 | { | |
3767 | struct ieee80211_local *local = hw_to_local(hw); | |
3768 | struct net_device *dev = local->scan_dev; | |
3769 | struct ieee80211_sub_if_data *sdata; | |
3770 | union iwreq_data wrqu; | |
3771 | ||
3772 | local->last_scan_completed = jiffies; | |
ece8eddd ZY |
3773 | memset(&wrqu, 0, sizeof(wrqu)); |
3774 | wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL); | |
f0706e82 | 3775 | |
ece8eddd ZY |
3776 | if (local->sta_hw_scanning) { |
3777 | local->sta_hw_scanning = 0; | |
675ef586 MA |
3778 | if (ieee80211_hw_config(local)) |
3779 | printk(KERN_DEBUG "%s: failed to restore operational " | |
3780 | "channel after scan\n", dev->name); | |
69d3b6f4 JB |
3781 | /* Restart STA timer for HW scan case */ |
3782 | rcu_read_lock(); | |
3783 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
3784 | ieee80211_restart_sta_timer(sdata); | |
3785 | rcu_read_unlock(); | |
3786 | ||
ece8eddd ZY |
3787 | goto done; |
3788 | } | |
3789 | ||
3790 | local->sta_sw_scanning = 0; | |
f0706e82 | 3791 | if (ieee80211_hw_config(local)) |
4b50e388 | 3792 | printk(KERN_DEBUG "%s: failed to restore operational " |
f0706e82 JB |
3793 | "channel after scan\n", dev->name); |
3794 | ||
4150c572 JB |
3795 | |
3796 | netif_tx_lock_bh(local->mdev); | |
e308a5d8 | 3797 | netif_addr_lock(local->mdev); |
4150c572 JB |
3798 | local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC; |
3799 | local->ops->configure_filter(local_to_hw(local), | |
3800 | FIF_BCN_PRBRESP_PROMISC, | |
3801 | &local->filter_flags, | |
3802 | local->mdev->mc_count, | |
3803 | local->mdev->mc_list); | |
3804 | ||
e308a5d8 | 3805 | netif_addr_unlock(local->mdev); |
4150c572 | 3806 | netif_tx_unlock_bh(local->mdev); |
f0706e82 | 3807 | |
79010420 JB |
3808 | rcu_read_lock(); |
3809 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
69d3b6f4 JB |
3810 | /* Tell AP we're back */ |
3811 | if (sdata->vif.type == IEEE80211_IF_TYPE_STA && | |
3812 | sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED) | |
3813 | ieee80211_send_nullfunc(local, sdata, 0); | |
14042cbe | 3814 | |
69d3b6f4 | 3815 | ieee80211_restart_sta_timer(sdata); |
f709fc69 | 3816 | |
f0706e82 JB |
3817 | netif_wake_queue(sdata->dev); |
3818 | } | |
79010420 | 3819 | rcu_read_unlock(); |
f0706e82 | 3820 | |
ece8eddd | 3821 | done: |
f0706e82 | 3822 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
51fb61e7 | 3823 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) { |
f0706e82 | 3824 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
d6f2da5b | 3825 | if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) || |
48c2fc59 | 3826 | (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) && |
f698d856 JBG |
3827 | !ieee80211_sta_active_ibss(sdata))) |
3828 | ieee80211_sta_find_ibss(sdata, ifsta); | |
f0706e82 JB |
3829 | } |
3830 | } | |
3831 | EXPORT_SYMBOL(ieee80211_scan_completed); | |
3832 | ||
3833 | void ieee80211_sta_scan_work(struct work_struct *work) | |
3834 | { | |
3835 | struct ieee80211_local *local = | |
3836 | container_of(work, struct ieee80211_local, scan_work.work); | |
3837 | struct net_device *dev = local->scan_dev; | |
3838 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
8318d78a | 3839 | struct ieee80211_supported_band *sband; |
f0706e82 JB |
3840 | struct ieee80211_channel *chan; |
3841 | int skip; | |
3842 | unsigned long next_delay = 0; | |
3843 | ||
ece8eddd | 3844 | if (!local->sta_sw_scanning) |
f0706e82 JB |
3845 | return; |
3846 | ||
3847 | switch (local->scan_state) { | |
3848 | case SCAN_SET_CHANNEL: | |
69d464d5 JB |
3849 | /* |
3850 | * Get current scan band. scan_band may be IEEE80211_NUM_BANDS | |
3851 | * after we successfully scanned the last channel of the last | |
3852 | * band (and the last band is supported by the hw) | |
3853 | */ | |
8318d78a JB |
3854 | if (local->scan_band < IEEE80211_NUM_BANDS) |
3855 | sband = local->hw.wiphy->bands[local->scan_band]; | |
3856 | else | |
3857 | sband = NULL; | |
3858 | ||
69d464d5 JB |
3859 | /* |
3860 | * If we are at an unsupported band and have more bands | |
3861 | * left to scan, advance to the next supported one. | |
3862 | */ | |
3863 | while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) { | |
8318d78a JB |
3864 | local->scan_band++; |
3865 | sband = local->hw.wiphy->bands[local->scan_band]; | |
3866 | local->scan_channel_idx = 0; | |
3867 | } | |
3868 | ||
69d464d5 JB |
3869 | /* if no more bands/channels left, complete scan */ |
3870 | if (!sband || local->scan_channel_idx >= sband->n_channels) { | |
f0706e82 JB |
3871 | ieee80211_scan_completed(local_to_hw(local)); |
3872 | return; | |
3873 | } | |
8318d78a JB |
3874 | skip = 0; |
3875 | chan = &sband->channels[local->scan_channel_idx]; | |
3876 | ||
3877 | if (chan->flags & IEEE80211_CHAN_DISABLED || | |
51fb61e7 | 3878 | (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && |
8318d78a | 3879 | chan->flags & IEEE80211_CHAN_NO_IBSS)) |
f0706e82 JB |
3880 | skip = 1; |
3881 | ||
3882 | if (!skip) { | |
f0706e82 JB |
3883 | local->scan_channel = chan; |
3884 | if (ieee80211_hw_config(local)) { | |
8318d78a JB |
3885 | printk(KERN_DEBUG "%s: failed to set freq to " |
3886 | "%d MHz for scan\n", dev->name, | |
3887 | chan->center_freq); | |
f0706e82 JB |
3888 | skip = 1; |
3889 | } | |
3890 | } | |
3891 | ||
69d464d5 | 3892 | /* advance state machine to next channel/band */ |
f0706e82 | 3893 | local->scan_channel_idx++; |
8318d78a | 3894 | if (local->scan_channel_idx >= sband->n_channels) { |
69d464d5 JB |
3895 | /* |
3896 | * scan_band may end up == IEEE80211_NUM_BANDS, but | |
3897 | * we'll catch that case above and complete the scan | |
3898 | * if that is the case. | |
3899 | */ | |
8318d78a JB |
3900 | local->scan_band++; |
3901 | local->scan_channel_idx = 0; | |
f0706e82 JB |
3902 | } |
3903 | ||
3904 | if (skip) | |
3905 | break; | |
3906 | ||
3907 | next_delay = IEEE80211_PROBE_DELAY + | |
3908 | usecs_to_jiffies(local->hw.channel_change_time); | |
3909 | local->scan_state = SCAN_SEND_PROBE; | |
3910 | break; | |
3911 | case SCAN_SEND_PROBE: | |
8318d78a | 3912 | next_delay = IEEE80211_PASSIVE_CHANNEL_TIME; |
f0706e82 | 3913 | local->scan_state = SCAN_SET_CHANNEL; |
8318d78a JB |
3914 | |
3915 | if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN) | |
3916 | break; | |
f698d856 | 3917 | ieee80211_send_probe_req(sdata, NULL, local->scan_ssid, |
8318d78a JB |
3918 | local->scan_ssid_len); |
3919 | next_delay = IEEE80211_CHANNEL_TIME; | |
f0706e82 JB |
3920 | break; |
3921 | } | |
3922 | ||
ece8eddd | 3923 | if (local->sta_sw_scanning) |
f0706e82 JB |
3924 | queue_delayed_work(local->hw.workqueue, &local->scan_work, |
3925 | next_delay); | |
3926 | } | |
3927 | ||
3928 | ||
f698d856 | 3929 | static int ieee80211_sta_start_scan(struct ieee80211_sub_if_data *scan_sdata, |
f0706e82 JB |
3930 | u8 *ssid, size_t ssid_len) |
3931 | { | |
f698d856 | 3932 | struct ieee80211_local *local = scan_sdata->local; |
f0706e82 JB |
3933 | struct ieee80211_sub_if_data *sdata; |
3934 | ||
3935 | if (ssid_len > IEEE80211_MAX_SSID_LEN) | |
3936 | return -EINVAL; | |
3937 | ||
3938 | /* MLME-SCAN.request (page 118) page 144 (11.1.3.1) | |
3939 | * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS | |
3940 | * BSSID: MACAddress | |
3941 | * SSID | |
3942 | * ScanType: ACTIVE, PASSIVE | |
3943 | * ProbeDelay: delay (in microseconds) to be used prior to transmitting | |
3944 | * a Probe frame during active scanning | |
3945 | * ChannelList | |
3946 | * MinChannelTime (>= ProbeDelay), in TU | |
3947 | * MaxChannelTime: (>= MinChannelTime), in TU | |
3948 | */ | |
3949 | ||
3950 | /* MLME-SCAN.confirm | |
3951 | * BSSDescriptionSet | |
3952 | * ResultCode: SUCCESS, INVALID_PARAMETERS | |
3953 | */ | |
3954 | ||
ece8eddd | 3955 | if (local->sta_sw_scanning || local->sta_hw_scanning) { |
f698d856 | 3956 | if (local->scan_dev == scan_sdata->dev) |
f0706e82 JB |
3957 | return 0; |
3958 | return -EBUSY; | |
3959 | } | |
3960 | ||
3961 | if (local->ops->hw_scan) { | |
3962 | int rc = local->ops->hw_scan(local_to_hw(local), | |
ece8eddd | 3963 | ssid, ssid_len); |
f0706e82 | 3964 | if (!rc) { |
ece8eddd | 3965 | local->sta_hw_scanning = 1; |
f698d856 | 3966 | local->scan_dev = scan_sdata->dev; |
f0706e82 JB |
3967 | } |
3968 | return rc; | |
3969 | } | |
3970 | ||
ece8eddd | 3971 | local->sta_sw_scanning = 1; |
f0706e82 | 3972 | |
79010420 JB |
3973 | rcu_read_lock(); |
3974 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
f0706e82 | 3975 | netif_stop_queue(sdata->dev); |
51fb61e7 | 3976 | if (sdata->vif.type == IEEE80211_IF_TYPE_STA && |
d6f2da5b | 3977 | (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)) |
f0706e82 JB |
3978 | ieee80211_send_nullfunc(local, sdata, 1); |
3979 | } | |
79010420 | 3980 | rcu_read_unlock(); |
f0706e82 JB |
3981 | |
3982 | if (ssid) { | |
3983 | local->scan_ssid_len = ssid_len; | |
3984 | memcpy(local->scan_ssid, ssid, ssid_len); | |
3985 | } else | |
3986 | local->scan_ssid_len = 0; | |
3987 | local->scan_state = SCAN_SET_CHANNEL; | |
f0706e82 | 3988 | local->scan_channel_idx = 0; |
8318d78a | 3989 | local->scan_band = IEEE80211_BAND_2GHZ; |
f698d856 | 3990 | local->scan_dev = scan_sdata->dev; |
f0706e82 | 3991 | |
b9e40857 | 3992 | netif_addr_lock_bh(local->mdev); |
4150c572 JB |
3993 | local->filter_flags |= FIF_BCN_PRBRESP_PROMISC; |
3994 | local->ops->configure_filter(local_to_hw(local), | |
3995 | FIF_BCN_PRBRESP_PROMISC, | |
3996 | &local->filter_flags, | |
3997 | local->mdev->mc_count, | |
3998 | local->mdev->mc_list); | |
b9e40857 | 3999 | netif_addr_unlock_bh(local->mdev); |
f0706e82 JB |
4000 | |
4001 | /* TODO: start scan as soon as all nullfunc frames are ACKed */ | |
4002 | queue_delayed_work(local->hw.workqueue, &local->scan_work, | |
4003 | IEEE80211_CHANNEL_TIME); | |
4004 | ||
4005 | return 0; | |
4006 | } | |
4007 | ||
4008 | ||
f698d856 | 4009 | int ieee80211_sta_req_scan(struct ieee80211_sub_if_data *sdata, u8 *ssid, size_t ssid_len) |
f0706e82 | 4010 | { |
f0706e82 | 4011 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
f698d856 | 4012 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 4013 | |
51fb61e7 | 4014 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
f698d856 | 4015 | return ieee80211_sta_start_scan(sdata, ssid, ssid_len); |
f0706e82 | 4016 | |
ece8eddd | 4017 | if (local->sta_sw_scanning || local->sta_hw_scanning) { |
f698d856 | 4018 | if (local->scan_dev == sdata->dev) |
f0706e82 JB |
4019 | return 0; |
4020 | return -EBUSY; | |
4021 | } | |
4022 | ||
a0af5f14 HS |
4023 | ifsta->scan_ssid_len = ssid_len; |
4024 | if (ssid_len) | |
4025 | memcpy(ifsta->scan_ssid, ssid, ssid_len); | |
f0706e82 JB |
4026 | set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request); |
4027 | queue_work(local->hw.workqueue, &ifsta->work); | |
4028 | return 0; | |
4029 | } | |
4030 | ||
43ac2ca3 JM |
4031 | |
4032 | static void ieee80211_sta_add_scan_ies(struct iw_request_info *info, | |
4033 | struct ieee80211_sta_bss *bss, | |
4034 | char **current_ev, char *end_buf) | |
4035 | { | |
4036 | u8 *pos, *end, *next; | |
4037 | struct iw_event iwe; | |
4038 | ||
4039 | if (bss == NULL || bss->ies == NULL) | |
4040 | return; | |
4041 | ||
4042 | /* | |
4043 | * If needed, fragment the IEs buffer (at IE boundaries) into short | |
4044 | * enough fragments to fit into IW_GENERIC_IE_MAX octet messages. | |
4045 | */ | |
4046 | pos = bss->ies; | |
4047 | end = pos + bss->ies_len; | |
4048 | ||
4049 | while (end - pos > IW_GENERIC_IE_MAX) { | |
4050 | next = pos + 2 + pos[1]; | |
4051 | while (next + 2 + next[1] - pos < IW_GENERIC_IE_MAX) | |
4052 | next = next + 2 + next[1]; | |
4053 | ||
4054 | memset(&iwe, 0, sizeof(iwe)); | |
4055 | iwe.cmd = IWEVGENIE; | |
4056 | iwe.u.data.length = next - pos; | |
4057 | *current_ev = iwe_stream_add_point(info, *current_ev, | |
4058 | end_buf, &iwe, pos); | |
4059 | ||
4060 | pos = next; | |
4061 | } | |
4062 | ||
4063 | if (end > pos) { | |
4064 | memset(&iwe, 0, sizeof(iwe)); | |
4065 | iwe.cmd = IWEVGENIE; | |
4066 | iwe.u.data.length = end - pos; | |
4067 | *current_ev = iwe_stream_add_point(info, *current_ev, | |
4068 | end_buf, &iwe, pos); | |
4069 | } | |
4070 | } | |
4071 | ||
4072 | ||
f0706e82 | 4073 | static char * |
f698d856 | 4074 | ieee80211_sta_scan_result(struct ieee80211_local *local, |
ccc58057 | 4075 | struct iw_request_info *info, |
f0706e82 JB |
4076 | struct ieee80211_sta_bss *bss, |
4077 | char *current_ev, char *end_buf) | |
4078 | { | |
f0706e82 JB |
4079 | struct iw_event iwe; |
4080 | ||
4081 | if (time_after(jiffies, | |
4082 | bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE)) | |
4083 | return current_ev; | |
4084 | ||
f0706e82 JB |
4085 | memset(&iwe, 0, sizeof(iwe)); |
4086 | iwe.cmd = SIOCGIWAP; | |
4087 | iwe.u.ap_addr.sa_family = ARPHRD_ETHER; | |
4088 | memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN); | |
ccc58057 | 4089 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, |
f0706e82 JB |
4090 | IW_EV_ADDR_LEN); |
4091 | ||
4092 | memset(&iwe, 0, sizeof(iwe)); | |
4093 | iwe.cmd = SIOCGIWESSID; | |
902acc78 JB |
4094 | if (bss_mesh_cfg(bss)) { |
4095 | iwe.u.data.length = bss_mesh_id_len(bss); | |
f709fc69 | 4096 | iwe.u.data.flags = 1; |
ccc58057 DM |
4097 | current_ev = iwe_stream_add_point(info, current_ev, end_buf, |
4098 | &iwe, bss_mesh_id(bss)); | |
f709fc69 LCC |
4099 | } else { |
4100 | iwe.u.data.length = bss->ssid_len; | |
4101 | iwe.u.data.flags = 1; | |
ccc58057 DM |
4102 | current_ev = iwe_stream_add_point(info, current_ev, end_buf, |
4103 | &iwe, bss->ssid); | |
f709fc69 | 4104 | } |
f0706e82 | 4105 | |
1d1b5359 LCC |
4106 | if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS) |
4107 | || bss_mesh_cfg(bss)) { | |
f0706e82 JB |
4108 | memset(&iwe, 0, sizeof(iwe)); |
4109 | iwe.cmd = SIOCGIWMODE; | |
902acc78 | 4110 | if (bss_mesh_cfg(bss)) |
f709fc69 LCC |
4111 | iwe.u.mode = IW_MODE_MESH; |
4112 | else if (bss->capability & WLAN_CAPABILITY_ESS) | |
f0706e82 JB |
4113 | iwe.u.mode = IW_MODE_MASTER; |
4114 | else | |
4115 | iwe.u.mode = IW_MODE_ADHOC; | |
ccc58057 DM |
4116 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, |
4117 | &iwe, IW_EV_UINT_LEN); | |
f0706e82 JB |
4118 | } |
4119 | ||
4120 | memset(&iwe, 0, sizeof(iwe)); | |
4121 | iwe.cmd = SIOCGIWFREQ; | |
9381be05 TW |
4122 | iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq); |
4123 | iwe.u.freq.e = 0; | |
ccc58057 | 4124 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, |
f0706e82 | 4125 | IW_EV_FREQ_LEN); |
8318d78a JB |
4126 | |
4127 | memset(&iwe, 0, sizeof(iwe)); | |
4128 | iwe.cmd = SIOCGIWFREQ; | |
9381be05 TW |
4129 | iwe.u.freq.m = bss->freq; |
4130 | iwe.u.freq.e = 6; | |
ccc58057 | 4131 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, |
f0706e82 | 4132 | IW_EV_FREQ_LEN); |
f0706e82 JB |
4133 | memset(&iwe, 0, sizeof(iwe)); |
4134 | iwe.cmd = IWEVQUAL; | |
566bfe5a BR |
4135 | iwe.u.qual.qual = bss->qual; |
4136 | iwe.u.qual.level = bss->signal; | |
f0706e82 JB |
4137 | iwe.u.qual.noise = bss->noise; |
4138 | iwe.u.qual.updated = local->wstats_flags; | |
ccc58057 | 4139 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, |
f0706e82 JB |
4140 | IW_EV_QUAL_LEN); |
4141 | ||
4142 | memset(&iwe, 0, sizeof(iwe)); | |
4143 | iwe.cmd = SIOCGIWENCODE; | |
4144 | if (bss->capability & WLAN_CAPABILITY_PRIVACY) | |
4145 | iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY; | |
4146 | else | |
4147 | iwe.u.data.flags = IW_ENCODE_DISABLED; | |
4148 | iwe.u.data.length = 0; | |
ccc58057 DM |
4149 | current_ev = iwe_stream_add_point(info, current_ev, end_buf, |
4150 | &iwe, ""); | |
f0706e82 | 4151 | |
43ac2ca3 | 4152 | ieee80211_sta_add_scan_ies(info, bss, ¤t_ev, end_buf); |
e623157b | 4153 | |
f0706e82 JB |
4154 | if (bss && bss->supp_rates_len > 0) { |
4155 | /* display all supported rates in readable format */ | |
ccc58057 | 4156 | char *p = current_ev + iwe_stream_lcp_len(info); |
f0706e82 JB |
4157 | int i; |
4158 | ||
4159 | memset(&iwe, 0, sizeof(iwe)); | |
4160 | iwe.cmd = SIOCGIWRATE; | |
4161 | /* Those two flags are ignored... */ | |
4162 | iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0; | |
4163 | ||
4164 | for (i = 0; i < bss->supp_rates_len; i++) { | |
4165 | iwe.u.bitrate.value = ((bss->supp_rates[i] & | |
4166 | 0x7f) * 500000); | |
ccc58057 | 4167 | p = iwe_stream_add_value(info, current_ev, p, |
f0706e82 JB |
4168 | end_buf, &iwe, IW_EV_PARAM_LEN); |
4169 | } | |
4170 | current_ev = p; | |
4171 | } | |
4172 | ||
4173 | if (bss) { | |
4174 | char *buf; | |
4175 | buf = kmalloc(30, GFP_ATOMIC); | |
4176 | if (buf) { | |
4177 | memset(&iwe, 0, sizeof(iwe)); | |
4178 | iwe.cmd = IWEVCUSTOM; | |
4179 | sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp)); | |
4180 | iwe.u.data.length = strlen(buf); | |
ccc58057 DM |
4181 | current_ev = iwe_stream_add_point(info, current_ev, |
4182 | end_buf, | |
f0706e82 | 4183 | &iwe, buf); |
bf998f68 EG |
4184 | memset(&iwe, 0, sizeof(iwe)); |
4185 | iwe.cmd = IWEVCUSTOM; | |
4186 | sprintf(buf, " Last beacon: %dms ago", | |
4187 | jiffies_to_msecs(jiffies - bss->last_update)); | |
4188 | iwe.u.data.length = strlen(buf); | |
4189 | current_ev = iwe_stream_add_point(info, current_ev, | |
4190 | end_buf, &iwe, buf); | |
f0706e82 JB |
4191 | kfree(buf); |
4192 | } | |
4193 | } | |
4194 | ||
902acc78 | 4195 | if (bss_mesh_cfg(bss)) { |
f709fc69 | 4196 | char *buf; |
24736701 | 4197 | u8 *cfg = bss_mesh_cfg(bss); |
4f5d4c4d | 4198 | buf = kmalloc(50, GFP_ATOMIC); |
f709fc69 LCC |
4199 | if (buf) { |
4200 | memset(&iwe, 0, sizeof(iwe)); | |
4201 | iwe.cmd = IWEVCUSTOM; | |
24736701 | 4202 | sprintf(buf, "Mesh network (version %d)", cfg[0]); |
4f5d4c4d | 4203 | iwe.u.data.length = strlen(buf); |
ccc58057 DM |
4204 | current_ev = iwe_stream_add_point(info, current_ev, |
4205 | end_buf, | |
4f5d4c4d LCC |
4206 | &iwe, buf); |
4207 | sprintf(buf, "Path Selection Protocol ID: " | |
24736701 JL |
4208 | "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3], |
4209 | cfg[4]); | |
4f5d4c4d | 4210 | iwe.u.data.length = strlen(buf); |
ccc58057 DM |
4211 | current_ev = iwe_stream_add_point(info, current_ev, |
4212 | end_buf, | |
4f5d4c4d LCC |
4213 | &iwe, buf); |
4214 | sprintf(buf, "Path Selection Metric ID: " | |
24736701 JL |
4215 | "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7], |
4216 | cfg[8]); | |
4f5d4c4d | 4217 | iwe.u.data.length = strlen(buf); |
ccc58057 DM |
4218 | current_ev = iwe_stream_add_point(info, current_ev, |
4219 | end_buf, | |
4f5d4c4d LCC |
4220 | &iwe, buf); |
4221 | sprintf(buf, "Congestion Control Mode ID: " | |
24736701 JL |
4222 | "0x%02X%02X%02X%02X", cfg[9], cfg[10], |
4223 | cfg[11], cfg[12]); | |
4f5d4c4d | 4224 | iwe.u.data.length = strlen(buf); |
ccc58057 DM |
4225 | current_ev = iwe_stream_add_point(info, current_ev, |
4226 | end_buf, | |
4f5d4c4d LCC |
4227 | &iwe, buf); |
4228 | sprintf(buf, "Channel Precedence: " | |
24736701 JL |
4229 | "0x%02X%02X%02X%02X", cfg[13], cfg[14], |
4230 | cfg[15], cfg[16]); | |
f709fc69 | 4231 | iwe.u.data.length = strlen(buf); |
ccc58057 DM |
4232 | current_ev = iwe_stream_add_point(info, current_ev, |
4233 | end_buf, | |
f709fc69 LCC |
4234 | &iwe, buf); |
4235 | kfree(buf); | |
4236 | } | |
4237 | } | |
4238 | ||
f0706e82 JB |
4239 | return current_ev; |
4240 | } | |
4241 | ||
4242 | ||
f698d856 | 4243 | int ieee80211_sta_scan_results(struct ieee80211_local *local, |
ccc58057 DM |
4244 | struct iw_request_info *info, |
4245 | char *buf, size_t len) | |
f0706e82 | 4246 | { |
f0706e82 JB |
4247 | char *current_ev = buf; |
4248 | char *end_buf = buf + len; | |
4249 | struct ieee80211_sta_bss *bss; | |
4250 | ||
4251 | spin_lock_bh(&local->sta_bss_lock); | |
4252 | list_for_each_entry(bss, &local->sta_bss_list, list) { | |
4253 | if (buf + len - current_ev <= IW_EV_ADDR_LEN) { | |
4254 | spin_unlock_bh(&local->sta_bss_lock); | |
4255 | return -E2BIG; | |
4256 | } | |
f698d856 | 4257 | current_ev = ieee80211_sta_scan_result(local, info, bss, |
ccc58057 | 4258 | current_ev, end_buf); |
f0706e82 JB |
4259 | } |
4260 | spin_unlock_bh(&local->sta_bss_lock); | |
4261 | return current_ev - buf; | |
4262 | } | |
4263 | ||
4264 | ||
f698d856 | 4265 | int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len) |
f0706e82 | 4266 | { |
f0706e82 | 4267 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
988c0f72 | 4268 | |
f0706e82 JB |
4269 | kfree(ifsta->extra_ie); |
4270 | if (len == 0) { | |
4271 | ifsta->extra_ie = NULL; | |
4272 | ifsta->extra_ie_len = 0; | |
4273 | return 0; | |
4274 | } | |
4275 | ifsta->extra_ie = kmalloc(len, GFP_KERNEL); | |
4276 | if (!ifsta->extra_ie) { | |
4277 | ifsta->extra_ie_len = 0; | |
4278 | return -ENOMEM; | |
4279 | } | |
4280 | memcpy(ifsta->extra_ie, ie, len); | |
4281 | ifsta->extra_ie_len = len; | |
4282 | return 0; | |
4283 | } | |
4284 | ||
4285 | ||
f698d856 | 4286 | struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, |
988c0f72 | 4287 | struct sk_buff *skb, u8 *bssid, |
87291c02 | 4288 | u8 *addr, u64 supp_rates) |
f0706e82 | 4289 | { |
f698d856 | 4290 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 4291 | struct sta_info *sta; |
0795af57 | 4292 | DECLARE_MAC_BUF(mac); |
87291c02 | 4293 | int band = local->hw.conf.channel->band; |
f0706e82 JB |
4294 | |
4295 | /* TODO: Could consider removing the least recently used entry and | |
4296 | * allow new one to be added. */ | |
4297 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { | |
4298 | if (net_ratelimit()) { | |
4299 | printk(KERN_DEBUG "%s: No room for a new IBSS STA " | |
f698d856 | 4300 | "entry %s\n", sdata->dev->name, print_mac(mac, addr)); |
f0706e82 JB |
4301 | } |
4302 | return NULL; | |
4303 | } | |
4304 | ||
1e188637 | 4305 | if (compare_ether_addr(bssid, sdata->u.sta.bssid)) |
87291c02 VK |
4306 | return NULL; |
4307 | ||
f4ea83dd | 4308 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
0795af57 | 4309 | printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n", |
f698d856 | 4310 | wiphy_name(local->hw.wiphy), print_mac(mac, addr), sdata->dev->name); |
f4ea83dd | 4311 | #endif |
f0706e82 | 4312 | |
73651ee6 JB |
4313 | sta = sta_info_alloc(sdata, addr, GFP_ATOMIC); |
4314 | if (!sta) | |
f0706e82 JB |
4315 | return NULL; |
4316 | ||
07346f81 | 4317 | set_sta_flags(sta, WLAN_STA_AUTHORIZED); |
238814fd | 4318 | |
87291c02 VK |
4319 | if (supp_rates) |
4320 | sta->supp_rates[band] = supp_rates; | |
4321 | else | |
4322 | sta->supp_rates[band] = sdata->u.sta.supp_rates_bits[band]; | |
f0706e82 JB |
4323 | |
4324 | rate_control_rate_init(sta, local); | |
4325 | ||
93e5deb1 | 4326 | if (sta_info_insert(sta)) |
73651ee6 | 4327 | return NULL; |
73651ee6 | 4328 | |
d0709a65 | 4329 | return sta; |
f0706e82 JB |
4330 | } |
4331 | ||
4332 | ||
f698d856 | 4333 | int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 4334 | { |
f0706e82 JB |
4335 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
4336 | ||
f4ea83dd | 4337 | printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n", |
f698d856 | 4338 | sdata->dev->name, reason); |
f0706e82 | 4339 | |
51fb61e7 JB |
4340 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA && |
4341 | sdata->vif.type != IEEE80211_IF_TYPE_IBSS) | |
f0706e82 JB |
4342 | return -EINVAL; |
4343 | ||
f698d856 JBG |
4344 | ieee80211_send_deauth(sdata, ifsta, reason); |
4345 | ieee80211_set_disassoc(sdata, ifsta, 1); | |
f0706e82 JB |
4346 | return 0; |
4347 | } | |
4348 | ||
4349 | ||
f698d856 | 4350 | int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 4351 | { |
f0706e82 JB |
4352 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
4353 | ||
f4ea83dd | 4354 | printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n", |
f698d856 | 4355 | sdata->dev->name, reason); |
f0706e82 | 4356 | |
51fb61e7 | 4357 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
f0706e82 JB |
4358 | return -EINVAL; |
4359 | ||
d6f2da5b | 4360 | if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED)) |
f0706e82 JB |
4361 | return -1; |
4362 | ||
f698d856 JBG |
4363 | ieee80211_send_disassoc(sdata, ifsta, reason); |
4364 | ieee80211_set_disassoc(sdata, ifsta, 0); | |
f0706e82 JB |
4365 | return 0; |
4366 | } | |
84363e6e MA |
4367 | |
4368 | void ieee80211_notify_mac(struct ieee80211_hw *hw, | |
4369 | enum ieee80211_notification_types notif_type) | |
4370 | { | |
4371 | struct ieee80211_local *local = hw_to_local(hw); | |
4372 | struct ieee80211_sub_if_data *sdata; | |
4373 | ||
4374 | switch (notif_type) { | |
4375 | case IEEE80211_NOTIFY_RE_ASSOC: | |
4376 | rcu_read_lock(); | |
4377 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
3e122be0 JB |
4378 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
4379 | continue; | |
84363e6e | 4380 | |
f698d856 | 4381 | ieee80211_sta_req_auth(sdata, &sdata->u.sta); |
84363e6e MA |
4382 | } |
4383 | rcu_read_unlock(); | |
4384 | break; | |
4385 | } | |
4386 | } | |
4387 | EXPORT_SYMBOL(ieee80211_notify_mac); |