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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" | |
33 | #include "ieee80211_rate.h" | |
47f0c502 | 34 | #include "ieee80211_led.h" |
f709fc69 | 35 | #include "mesh.h" |
f0706e82 JB |
36 | |
37 | #define IEEE80211_AUTH_TIMEOUT (HZ / 5) | |
38 | #define IEEE80211_AUTH_MAX_TRIES 3 | |
39 | #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) | |
40 | #define IEEE80211_ASSOC_MAX_TRIES 3 | |
41 | #define IEEE80211_MONITORING_INTERVAL (2 * HZ) | |
f709fc69 | 42 | #define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ) |
f0706e82 JB |
43 | #define IEEE80211_PROBE_INTERVAL (60 * HZ) |
44 | #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ) | |
45 | #define IEEE80211_SCAN_INTERVAL (2 * HZ) | |
46 | #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ) | |
47 | #define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ) | |
48 | ||
49 | #define IEEE80211_PROBE_DELAY (HZ / 33) | |
50 | #define IEEE80211_CHANNEL_TIME (HZ / 33) | |
51 | #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5) | |
52 | #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ) | |
53 | #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ) | |
54 | #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ) | |
f709fc69 | 55 | #define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ) |
f0706e82 JB |
56 | |
57 | #define IEEE80211_IBSS_MAX_STA_ENTRIES 128 | |
58 | ||
59 | ||
60 | #define IEEE80211_FC(type, stype) cpu_to_le16(type | stype) | |
61 | ||
62 | #define ERP_INFO_USE_PROTECTION BIT(1) | |
63 | ||
9f985b0e RR |
64 | /* mgmt header + 1 byte action code */ |
65 | #define IEEE80211_MIN_ACTION_SIZE (24 + 1) | |
66 | ||
67 | #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002 | |
68 | #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C | |
69 | #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0 | |
688b88a4 RR |
70 | #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000 |
71 | #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800 | |
9f985b0e | 72 | |
07db2183 RR |
73 | /* next values represent the buffer size for A-MPDU frame. |
74 | * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */ | |
75 | #define IEEE80211_MIN_AMPDU_BUF 0x8 | |
76 | #define IEEE80211_MAX_AMPDU_BUF 0x40 | |
77 | ||
f0706e82 JB |
78 | static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst, |
79 | u8 *ssid, size_t ssid_len); | |
80 | static struct ieee80211_sta_bss * | |
8318d78a | 81 | ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq, |
cffdd30d | 82 | u8 *ssid, u8 ssid_len); |
f0706e82 JB |
83 | static void ieee80211_rx_bss_put(struct net_device *dev, |
84 | struct ieee80211_sta_bss *bss); | |
85 | static int ieee80211_sta_find_ibss(struct net_device *dev, | |
86 | struct ieee80211_if_sta *ifsta); | |
87 | static int ieee80211_sta_wep_configured(struct net_device *dev); | |
88 | static int ieee80211_sta_start_scan(struct net_device *dev, | |
89 | u8 *ssid, size_t ssid_len); | |
90 | static int ieee80211_sta_config_auth(struct net_device *dev, | |
91 | struct ieee80211_if_sta *ifsta); | |
92 | ||
93 | ||
ee385855 LCC |
94 | void ieee802_11_parse_elems(u8 *start, size_t len, |
95 | struct ieee802_11_elems *elems) | |
f0706e82 JB |
96 | { |
97 | size_t left = len; | |
98 | u8 *pos = start; | |
f0706e82 JB |
99 | |
100 | memset(elems, 0, sizeof(*elems)); | |
101 | ||
102 | while (left >= 2) { | |
103 | u8 id, elen; | |
104 | ||
105 | id = *pos++; | |
106 | elen = *pos++; | |
107 | left -= 2; | |
108 | ||
67a4cce4 JL |
109 | if (elen > left) |
110 | return; | |
f0706e82 JB |
111 | |
112 | switch (id) { | |
113 | case WLAN_EID_SSID: | |
114 | elems->ssid = pos; | |
115 | elems->ssid_len = elen; | |
116 | break; | |
117 | case WLAN_EID_SUPP_RATES: | |
118 | elems->supp_rates = pos; | |
119 | elems->supp_rates_len = elen; | |
120 | break; | |
121 | case WLAN_EID_FH_PARAMS: | |
122 | elems->fh_params = pos; | |
123 | elems->fh_params_len = elen; | |
124 | break; | |
125 | case WLAN_EID_DS_PARAMS: | |
126 | elems->ds_params = pos; | |
127 | elems->ds_params_len = elen; | |
128 | break; | |
129 | case WLAN_EID_CF_PARAMS: | |
130 | elems->cf_params = pos; | |
131 | elems->cf_params_len = elen; | |
132 | break; | |
133 | case WLAN_EID_TIM: | |
134 | elems->tim = pos; | |
135 | elems->tim_len = elen; | |
136 | break; | |
137 | case WLAN_EID_IBSS_PARAMS: | |
138 | elems->ibss_params = pos; | |
139 | elems->ibss_params_len = elen; | |
140 | break; | |
141 | case WLAN_EID_CHALLENGE: | |
142 | elems->challenge = pos; | |
143 | elems->challenge_len = elen; | |
144 | break; | |
145 | case WLAN_EID_WPA: | |
146 | if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && | |
147 | pos[2] == 0xf2) { | |
148 | /* Microsoft OUI (00:50:F2) */ | |
149 | if (pos[3] == 1) { | |
150 | /* OUI Type 1 - WPA IE */ | |
151 | elems->wpa = pos; | |
152 | elems->wpa_len = elen; | |
153 | } else if (elen >= 5 && pos[3] == 2) { | |
154 | if (pos[4] == 0) { | |
155 | elems->wmm_info = pos; | |
156 | elems->wmm_info_len = elen; | |
157 | } else if (pos[4] == 1) { | |
158 | elems->wmm_param = pos; | |
159 | elems->wmm_param_len = elen; | |
160 | } | |
161 | } | |
162 | } | |
163 | break; | |
164 | case WLAN_EID_RSN: | |
165 | elems->rsn = pos; | |
166 | elems->rsn_len = elen; | |
167 | break; | |
168 | case WLAN_EID_ERP_INFO: | |
169 | elems->erp_info = pos; | |
170 | elems->erp_info_len = elen; | |
171 | break; | |
172 | case WLAN_EID_EXT_SUPP_RATES: | |
173 | elems->ext_supp_rates = pos; | |
174 | elems->ext_supp_rates_len = elen; | |
175 | break; | |
c7153508 RR |
176 | case WLAN_EID_HT_CAPABILITY: |
177 | elems->ht_cap_elem = pos; | |
178 | elems->ht_cap_elem_len = elen; | |
179 | break; | |
180 | case WLAN_EID_HT_EXTRA_INFO: | |
181 | elems->ht_info_elem = pos; | |
182 | elems->ht_info_elem_len = elen; | |
183 | break; | |
ee385855 LCC |
184 | case WLAN_EID_MESH_ID: |
185 | elems->mesh_id = pos; | |
186 | elems->mesh_id_len = elen; | |
187 | break; | |
188 | case WLAN_EID_MESH_CONFIG: | |
189 | elems->mesh_config = pos; | |
190 | elems->mesh_config_len = elen; | |
191 | break; | |
192 | case WLAN_EID_PEER_LINK: | |
193 | elems->peer_link = pos; | |
194 | elems->peer_link_len = elen; | |
195 | break; | |
196 | case WLAN_EID_PREQ: | |
197 | elems->preq = pos; | |
198 | elems->preq_len = elen; | |
199 | break; | |
200 | case WLAN_EID_PREP: | |
201 | elems->prep = pos; | |
202 | elems->prep_len = elen; | |
203 | break; | |
204 | case WLAN_EID_PERR: | |
205 | elems->perr = pos; | |
206 | elems->perr_len = elen; | |
207 | break; | |
f0706e82 | 208 | default: |
f0706e82 JB |
209 | break; |
210 | } | |
211 | ||
212 | left -= elen; | |
213 | pos += elen; | |
214 | } | |
f0706e82 JB |
215 | } |
216 | ||
217 | ||
f0706e82 JB |
218 | static int ecw2cw(int ecw) |
219 | { | |
ac2bf324 | 220 | return (1 << ecw) - 1; |
f0706e82 JB |
221 | } |
222 | ||
e2839d8f VK |
223 | |
224 | static void ieee80211_sta_def_wmm_params(struct net_device *dev, | |
225 | struct ieee80211_sta_bss *bss, | |
226 | int ibss) | |
227 | { | |
228 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
229 | struct ieee80211_local *local = sdata->local; | |
230 | int i, have_higher_than_11mbit = 0; | |
231 | ||
232 | ||
233 | /* cf. IEEE 802.11 9.2.12 */ | |
234 | for (i = 0; i < bss->supp_rates_len; i++) | |
235 | if ((bss->supp_rates[i] & 0x7f) * 5 > 110) | |
236 | have_higher_than_11mbit = 1; | |
237 | ||
238 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
239 | have_higher_than_11mbit) | |
240 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
241 | else | |
242 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
243 | ||
244 | ||
245 | if (local->ops->conf_tx) { | |
246 | struct ieee80211_tx_queue_params qparam; | |
e2839d8f VK |
247 | |
248 | memset(&qparam, 0, sizeof(qparam)); | |
249 | ||
250 | qparam.aifs = 2; | |
251 | ||
252 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
253 | !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)) | |
254 | qparam.cw_min = 31; | |
255 | else | |
256 | qparam.cw_min = 15; | |
257 | ||
258 | qparam.cw_max = 1023; | |
259 | qparam.txop = 0; | |
260 | ||
261 | for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++) | |
262 | local->ops->conf_tx(local_to_hw(local), | |
263 | i + IEEE80211_TX_QUEUE_DATA0, | |
264 | &qparam); | |
265 | ||
266 | if (ibss) { | |
267 | /* IBSS uses different parameters for Beacon sending */ | |
268 | qparam.cw_min++; | |
269 | qparam.cw_min *= 2; | |
270 | qparam.cw_min--; | |
271 | local->ops->conf_tx(local_to_hw(local), | |
272 | IEEE80211_TX_QUEUE_BEACON, &qparam); | |
273 | } | |
274 | } | |
275 | } | |
276 | ||
f0706e82 JB |
277 | static void ieee80211_sta_wmm_params(struct net_device *dev, |
278 | struct ieee80211_if_sta *ifsta, | |
279 | u8 *wmm_param, size_t wmm_param_len) | |
280 | { | |
281 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
282 | struct ieee80211_tx_queue_params params; | |
283 | size_t left; | |
284 | int count; | |
285 | u8 *pos; | |
286 | ||
287 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) | |
288 | return; | |
289 | count = wmm_param[6] & 0x0f; | |
290 | if (count == ifsta->wmm_last_param_set) | |
291 | return; | |
292 | ifsta->wmm_last_param_set = count; | |
293 | ||
294 | pos = wmm_param + 8; | |
295 | left = wmm_param_len - 8; | |
296 | ||
297 | memset(¶ms, 0, sizeof(params)); | |
298 | ||
299 | if (!local->ops->conf_tx) | |
300 | return; | |
301 | ||
302 | local->wmm_acm = 0; | |
303 | for (; left >= 4; left -= 4, pos += 4) { | |
304 | int aci = (pos[0] >> 5) & 0x03; | |
305 | int acm = (pos[0] >> 4) & 0x01; | |
306 | int queue; | |
307 | ||
308 | switch (aci) { | |
309 | case 1: | |
310 | queue = IEEE80211_TX_QUEUE_DATA3; | |
311 | if (acm) { | |
312 | local->wmm_acm |= BIT(0) | BIT(3); | |
313 | } | |
314 | break; | |
315 | case 2: | |
316 | queue = IEEE80211_TX_QUEUE_DATA1; | |
317 | if (acm) { | |
318 | local->wmm_acm |= BIT(4) | BIT(5); | |
319 | } | |
320 | break; | |
321 | case 3: | |
322 | queue = IEEE80211_TX_QUEUE_DATA0; | |
323 | if (acm) { | |
324 | local->wmm_acm |= BIT(6) | BIT(7); | |
325 | } | |
326 | break; | |
327 | case 0: | |
328 | default: | |
329 | queue = IEEE80211_TX_QUEUE_DATA2; | |
330 | if (acm) { | |
331 | local->wmm_acm |= BIT(1) | BIT(2); | |
332 | } | |
333 | break; | |
334 | } | |
335 | ||
336 | params.aifs = pos[0] & 0x0f; | |
337 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); | |
338 | params.cw_min = ecw2cw(pos[1] & 0x0f); | |
3330d7be JB |
339 | params.txop = pos[2] | (pos[3] << 8); |
340 | #ifdef CONFIG_MAC80211_DEBUG | |
f0706e82 | 341 | printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d " |
3330d7be | 342 | "cWmin=%d cWmax=%d txop=%d\n", |
f0706e82 | 343 | dev->name, queue, aci, acm, params.aifs, params.cw_min, |
3330d7be JB |
344 | params.cw_max, params.txop); |
345 | #endif | |
f0706e82 JB |
346 | /* TODO: handle ACM (block TX, fallback to next lowest allowed |
347 | * AC for now) */ | |
348 | if (local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) { | |
349 | printk(KERN_DEBUG "%s: failed to set TX queue " | |
350 | "parameters for queue %d\n", dev->name, queue); | |
351 | } | |
352 | } | |
353 | } | |
354 | ||
355 | ||
471b3efd JB |
356 | static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata, |
357 | u8 erp_value) | |
5628221c | 358 | { |
471b3efd | 359 | struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf; |
5628221c | 360 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
471b3efd | 361 | bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0; |
d43c7b37 | 362 | bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0; |
0795af57 | 363 | DECLARE_MAC_BUF(mac); |
471b3efd | 364 | u32 changed = 0; |
5628221c | 365 | |
471b3efd | 366 | if (use_protection != bss_conf->use_cts_prot) { |
5628221c DD |
367 | if (net_ratelimit()) { |
368 | printk(KERN_DEBUG "%s: CTS protection %s (BSSID=" | |
0795af57 | 369 | "%s)\n", |
471b3efd | 370 | sdata->dev->name, |
5628221c | 371 | use_protection ? "enabled" : "disabled", |
0795af57 | 372 | print_mac(mac, ifsta->bssid)); |
5628221c | 373 | } |
471b3efd JB |
374 | bss_conf->use_cts_prot = use_protection; |
375 | changed |= BSS_CHANGED_ERP_CTS_PROT; | |
5628221c | 376 | } |
7e9ed188 | 377 | |
d43c7b37 | 378 | if (use_short_preamble != bss_conf->use_short_preamble) { |
7e9ed188 DD |
379 | if (net_ratelimit()) { |
380 | printk(KERN_DEBUG "%s: switched to %s barker preamble" | |
0795af57 | 381 | " (BSSID=%s)\n", |
471b3efd | 382 | sdata->dev->name, |
d43c7b37 | 383 | use_short_preamble ? "short" : "long", |
0795af57 | 384 | print_mac(mac, ifsta->bssid)); |
7e9ed188 | 385 | } |
d43c7b37 | 386 | bss_conf->use_short_preamble = use_short_preamble; |
471b3efd | 387 | changed |= BSS_CHANGED_ERP_PREAMBLE; |
7e9ed188 | 388 | } |
d9430a32 | 389 | |
471b3efd | 390 | return changed; |
5628221c DD |
391 | } |
392 | ||
c7153508 RR |
393 | int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie, |
394 | struct ieee80211_ht_info *ht_info) | |
395 | { | |
396 | ||
397 | if (ht_info == NULL) | |
398 | return -EINVAL; | |
399 | ||
400 | memset(ht_info, 0, sizeof(*ht_info)); | |
401 | ||
402 | if (ht_cap_ie) { | |
403 | u8 ampdu_info = ht_cap_ie->ampdu_params_info; | |
404 | ||
405 | ht_info->ht_supported = 1; | |
406 | ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info); | |
407 | ht_info->ampdu_factor = | |
408 | ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR; | |
409 | ht_info->ampdu_density = | |
410 | (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2; | |
411 | memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16); | |
412 | } else | |
413 | ht_info->ht_supported = 0; | |
414 | ||
415 | return 0; | |
416 | } | |
417 | ||
418 | int ieee80211_ht_addt_info_ie_to_ht_bss_info( | |
419 | struct ieee80211_ht_addt_info *ht_add_info_ie, | |
420 | struct ieee80211_ht_bss_info *bss_info) | |
421 | { | |
422 | if (bss_info == NULL) | |
423 | return -EINVAL; | |
424 | ||
425 | memset(bss_info, 0, sizeof(*bss_info)); | |
426 | ||
427 | if (ht_add_info_ie) { | |
428 | u16 op_mode; | |
429 | op_mode = le16_to_cpu(ht_add_info_ie->operation_mode); | |
430 | ||
431 | bss_info->primary_channel = ht_add_info_ie->control_chan; | |
432 | bss_info->bss_cap = ht_add_info_ie->ht_param; | |
433 | bss_info->bss_op_mode = (u8)(op_mode & 0xff); | |
434 | } | |
435 | ||
436 | return 0; | |
437 | } | |
5628221c | 438 | |
f0706e82 JB |
439 | static void ieee80211_sta_send_associnfo(struct net_device *dev, |
440 | struct ieee80211_if_sta *ifsta) | |
441 | { | |
442 | char *buf; | |
443 | size_t len; | |
444 | int i; | |
445 | union iwreq_data wrqu; | |
446 | ||
447 | if (!ifsta->assocreq_ies && !ifsta->assocresp_ies) | |
448 | return; | |
449 | ||
450 | buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len + | |
0ec0b7ac | 451 | ifsta->assocresp_ies_len), GFP_KERNEL); |
f0706e82 JB |
452 | if (!buf) |
453 | return; | |
454 | ||
455 | len = sprintf(buf, "ASSOCINFO("); | |
456 | if (ifsta->assocreq_ies) { | |
457 | len += sprintf(buf + len, "ReqIEs="); | |
458 | for (i = 0; i < ifsta->assocreq_ies_len; i++) { | |
459 | len += sprintf(buf + len, "%02x", | |
460 | ifsta->assocreq_ies[i]); | |
461 | } | |
462 | } | |
463 | if (ifsta->assocresp_ies) { | |
464 | if (ifsta->assocreq_ies) | |
465 | len += sprintf(buf + len, " "); | |
466 | len += sprintf(buf + len, "RespIEs="); | |
467 | for (i = 0; i < ifsta->assocresp_ies_len; i++) { | |
468 | len += sprintf(buf + len, "%02x", | |
469 | ifsta->assocresp_ies[i]); | |
470 | } | |
471 | } | |
472 | len += sprintf(buf + len, ")"); | |
473 | ||
474 | if (len > IW_CUSTOM_MAX) { | |
475 | len = sprintf(buf, "ASSOCRESPIE="); | |
476 | for (i = 0; i < ifsta->assocresp_ies_len; i++) { | |
477 | len += sprintf(buf + len, "%02x", | |
478 | ifsta->assocresp_ies[i]); | |
479 | } | |
480 | } | |
481 | ||
482 | memset(&wrqu, 0, sizeof(wrqu)); | |
483 | wrqu.data.length = len; | |
484 | wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf); | |
485 | ||
486 | kfree(buf); | |
487 | } | |
488 | ||
489 | ||
490 | static void ieee80211_set_associated(struct net_device *dev, | |
d6f2da5b | 491 | struct ieee80211_if_sta *ifsta, |
47f0c502 | 492 | bool assoc) |
f0706e82 | 493 | { |
471b3efd JB |
494 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
495 | struct ieee80211_local *local = sdata->local; | |
f0706e82 | 496 | union iwreq_data wrqu; |
471b3efd | 497 | u32 changed = BSS_CHANGED_ASSOC; |
f0706e82 | 498 | |
f0706e82 | 499 | if (assoc) { |
5628221c | 500 | struct ieee80211_sta_bss *bss; |
d6f2da5b JS |
501 | |
502 | ifsta->flags |= IEEE80211_STA_ASSOCIATED; | |
503 | ||
51fb61e7 | 504 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
f0706e82 | 505 | return; |
5628221c | 506 | |
65c107ab | 507 | bss = ieee80211_rx_bss_get(dev, ifsta->bssid, |
8318d78a | 508 | local->hw.conf.channel->center_freq, |
cffdd30d | 509 | ifsta->ssid, ifsta->ssid_len); |
5628221c DD |
510 | if (bss) { |
511 | if (bss->has_erp_value) | |
471b3efd JB |
512 | changed |= ieee80211_handle_erp_ie( |
513 | sdata, bss->erp_value); | |
5628221c DD |
514 | ieee80211_rx_bss_put(dev, bss); |
515 | } | |
516 | ||
f0706e82 | 517 | netif_carrier_on(dev); |
d6f2da5b | 518 | ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET; |
f0706e82 JB |
519 | memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN); |
520 | memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN); | |
521 | ieee80211_sta_send_associnfo(dev, ifsta); | |
522 | } else { | |
85249e5f | 523 | ieee80211_sta_tear_down_BA_sessions(dev, ifsta->bssid); |
d6f2da5b | 524 | ifsta->flags &= ~IEEE80211_STA_ASSOCIATED; |
f0706e82 | 525 | netif_carrier_off(dev); |
d9430a32 | 526 | ieee80211_reset_erp_info(dev); |
f0706e82 JB |
527 | memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN); |
528 | } | |
529 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; | |
530 | wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); | |
531 | ifsta->last_probe = jiffies; | |
47f0c502 | 532 | ieee80211_led_assoc(local, assoc); |
471b3efd | 533 | |
b2205256 | 534 | sdata->bss_conf.assoc = assoc; |
471b3efd | 535 | ieee80211_bss_info_change_notify(sdata, changed); |
f0706e82 JB |
536 | } |
537 | ||
538 | static void ieee80211_set_disassoc(struct net_device *dev, | |
539 | struct ieee80211_if_sta *ifsta, int deauth) | |
540 | { | |
541 | if (deauth) | |
542 | ifsta->auth_tries = 0; | |
543 | ifsta->assoc_tries = 0; | |
544 | ieee80211_set_associated(dev, ifsta, 0); | |
545 | } | |
546 | ||
ee385855 LCC |
547 | void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb, |
548 | int encrypt) | |
f0706e82 JB |
549 | { |
550 | struct ieee80211_sub_if_data *sdata; | |
551 | struct ieee80211_tx_packet_data *pkt_data; | |
552 | ||
553 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
554 | skb->dev = sdata->local->mdev; | |
555 | skb_set_mac_header(skb, 0); | |
556 | skb_set_network_header(skb, 0); | |
557 | skb_set_transport_header(skb, 0); | |
558 | ||
559 | pkt_data = (struct ieee80211_tx_packet_data *) skb->cb; | |
560 | memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data)); | |
561 | pkt_data->ifindex = sdata->dev->ifindex; | |
e8bf9649 JS |
562 | if (!encrypt) |
563 | pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT; | |
f0706e82 JB |
564 | |
565 | dev_queue_xmit(skb); | |
566 | } | |
567 | ||
568 | ||
569 | static void ieee80211_send_auth(struct net_device *dev, | |
570 | struct ieee80211_if_sta *ifsta, | |
571 | int transaction, u8 *extra, size_t extra_len, | |
572 | int encrypt) | |
573 | { | |
574 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
575 | struct sk_buff *skb; | |
576 | struct ieee80211_mgmt *mgmt; | |
577 | ||
578 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
579 | sizeof(*mgmt) + 6 + extra_len); | |
580 | if (!skb) { | |
581 | printk(KERN_DEBUG "%s: failed to allocate buffer for auth " | |
582 | "frame\n", dev->name); | |
583 | return; | |
584 | } | |
585 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
586 | ||
587 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); | |
588 | memset(mgmt, 0, 24 + 6); | |
589 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
590 | IEEE80211_STYPE_AUTH); | |
591 | if (encrypt) | |
592 | mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
593 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
594 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
595 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
596 | mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg); | |
597 | mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); | |
598 | ifsta->auth_transaction = transaction + 1; | |
599 | mgmt->u.auth.status_code = cpu_to_le16(0); | |
600 | if (extra) | |
601 | memcpy(skb_put(skb, extra_len), extra, extra_len); | |
602 | ||
603 | ieee80211_sta_tx(dev, skb, encrypt); | |
604 | } | |
605 | ||
606 | ||
607 | static void ieee80211_authenticate(struct net_device *dev, | |
608 | struct ieee80211_if_sta *ifsta) | |
609 | { | |
0795af57 JP |
610 | DECLARE_MAC_BUF(mac); |
611 | ||
f0706e82 JB |
612 | ifsta->auth_tries++; |
613 | if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0795af57 | 614 | printk(KERN_DEBUG "%s: authentication with AP %s" |
f0706e82 | 615 | " timed out\n", |
0795af57 | 616 | dev->name, print_mac(mac, ifsta->bssid)); |
f0706e82 JB |
617 | ifsta->state = IEEE80211_DISABLED; |
618 | return; | |
619 | } | |
620 | ||
621 | ifsta->state = IEEE80211_AUTHENTICATE; | |
0795af57 JP |
622 | printk(KERN_DEBUG "%s: authenticate with AP %s\n", |
623 | dev->name, print_mac(mac, ifsta->bssid)); | |
f0706e82 JB |
624 | |
625 | ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0); | |
626 | ||
627 | mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT); | |
628 | } | |
629 | ||
630 | ||
631 | static void ieee80211_send_assoc(struct net_device *dev, | |
632 | struct ieee80211_if_sta *ifsta) | |
633 | { | |
634 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
f0706e82 JB |
635 | struct sk_buff *skb; |
636 | struct ieee80211_mgmt *mgmt; | |
637 | u8 *pos, *ies; | |
638 | int i, len; | |
639 | u16 capab; | |
640 | struct ieee80211_sta_bss *bss; | |
641 | int wmm = 0; | |
8318d78a | 642 | struct ieee80211_supported_band *sband; |
f0706e82 JB |
643 | |
644 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
645 | sizeof(*mgmt) + 200 + ifsta->extra_ie_len + | |
646 | ifsta->ssid_len); | |
647 | if (!skb) { | |
648 | printk(KERN_DEBUG "%s: failed to allocate buffer for assoc " | |
649 | "frame\n", dev->name); | |
650 | return; | |
651 | } | |
652 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
653 | ||
8318d78a JB |
654 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
655 | ||
f0706e82 | 656 | capab = ifsta->capab; |
8318d78a JB |
657 | |
658 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) { | |
659 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) | |
660 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; | |
661 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) | |
662 | capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; | |
f0706e82 | 663 | } |
8318d78a JB |
664 | |
665 | bss = ieee80211_rx_bss_get(dev, ifsta->bssid, | |
666 | local->hw.conf.channel->center_freq, | |
cffdd30d | 667 | ifsta->ssid, ifsta->ssid_len); |
f0706e82 JB |
668 | if (bss) { |
669 | if (bss->capability & WLAN_CAPABILITY_PRIVACY) | |
670 | capab |= WLAN_CAPABILITY_PRIVACY; | |
671 | if (bss->wmm_ie) { | |
672 | wmm = 1; | |
673 | } | |
674 | ieee80211_rx_bss_put(dev, bss); | |
675 | } | |
676 | ||
677 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
678 | memset(mgmt, 0, 24); | |
679 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
680 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
681 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
682 | ||
d6f2da5b | 683 | if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) { |
f0706e82 JB |
684 | skb_put(skb, 10); |
685 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
686 | IEEE80211_STYPE_REASSOC_REQ); | |
687 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); | |
688 | mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1); | |
689 | memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid, | |
690 | ETH_ALEN); | |
691 | } else { | |
692 | skb_put(skb, 4); | |
693 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
694 | IEEE80211_STYPE_ASSOC_REQ); | |
695 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); | |
696 | mgmt->u.assoc_req.listen_interval = cpu_to_le16(1); | |
697 | } | |
698 | ||
699 | /* SSID */ | |
700 | ies = pos = skb_put(skb, 2 + ifsta->ssid_len); | |
701 | *pos++ = WLAN_EID_SSID; | |
702 | *pos++ = ifsta->ssid_len; | |
703 | memcpy(pos, ifsta->ssid, ifsta->ssid_len); | |
704 | ||
8318d78a | 705 | len = sband->n_bitrates; |
f0706e82 JB |
706 | if (len > 8) |
707 | len = 8; | |
708 | pos = skb_put(skb, len + 2); | |
709 | *pos++ = WLAN_EID_SUPP_RATES; | |
710 | *pos++ = len; | |
711 | for (i = 0; i < len; i++) { | |
8318d78a | 712 | int rate = sband->bitrates[i].bitrate; |
f0706e82 JB |
713 | *pos++ = (u8) (rate / 5); |
714 | } | |
715 | ||
8318d78a JB |
716 | if (sband->n_bitrates > len) { |
717 | pos = skb_put(skb, sband->n_bitrates - len + 2); | |
f0706e82 | 718 | *pos++ = WLAN_EID_EXT_SUPP_RATES; |
8318d78a JB |
719 | *pos++ = sband->n_bitrates - len; |
720 | for (i = len; i < sband->n_bitrates; i++) { | |
721 | int rate = sband->bitrates[i].bitrate; | |
f0706e82 JB |
722 | *pos++ = (u8) (rate / 5); |
723 | } | |
724 | } | |
725 | ||
726 | if (ifsta->extra_ie) { | |
727 | pos = skb_put(skb, ifsta->extra_ie_len); | |
728 | memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len); | |
729 | } | |
730 | ||
d6f2da5b | 731 | if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) { |
f0706e82 JB |
732 | pos = skb_put(skb, 9); |
733 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
734 | *pos++ = 7; /* len */ | |
735 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ | |
736 | *pos++ = 0x50; | |
737 | *pos++ = 0xf2; | |
738 | *pos++ = 2; /* WME */ | |
739 | *pos++ = 0; /* WME info */ | |
740 | *pos++ = 1; /* WME ver */ | |
741 | *pos++ = 0; | |
742 | } | |
c7153508 | 743 | /* wmm support is a must to HT */ |
8318d78a JB |
744 | if (wmm && sband->ht_info.ht_supported) { |
745 | __le16 tmp = cpu_to_le16(sband->ht_info.cap); | |
c7153508 RR |
746 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2); |
747 | *pos++ = WLAN_EID_HT_CAPABILITY; | |
748 | *pos++ = sizeof(struct ieee80211_ht_cap); | |
749 | memset(pos, 0, sizeof(struct ieee80211_ht_cap)); | |
750 | memcpy(pos, &tmp, sizeof(u16)); | |
751 | pos += sizeof(u16); | |
8318d78a JB |
752 | /* TODO: needs a define here for << 2 */ |
753 | *pos++ = sband->ht_info.ampdu_factor | | |
754 | (sband->ht_info.ampdu_density << 2); | |
755 | memcpy(pos, sband->ht_info.supp_mcs_set, 16); | |
c7153508 | 756 | } |
f0706e82 JB |
757 | |
758 | kfree(ifsta->assocreq_ies); | |
759 | ifsta->assocreq_ies_len = (skb->data + skb->len) - ies; | |
0ec0b7ac | 760 | ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL); |
f0706e82 JB |
761 | if (ifsta->assocreq_ies) |
762 | memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len); | |
763 | ||
764 | ieee80211_sta_tx(dev, skb, 0); | |
765 | } | |
766 | ||
767 | ||
768 | static void ieee80211_send_deauth(struct net_device *dev, | |
769 | struct ieee80211_if_sta *ifsta, u16 reason) | |
770 | { | |
771 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
772 | struct sk_buff *skb; | |
773 | struct ieee80211_mgmt *mgmt; | |
774 | ||
775 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); | |
776 | if (!skb) { | |
777 | printk(KERN_DEBUG "%s: failed to allocate buffer for deauth " | |
778 | "frame\n", dev->name); | |
779 | return; | |
780 | } | |
781 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
782 | ||
783 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
784 | memset(mgmt, 0, 24); | |
785 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
786 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
787 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
788 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
789 | IEEE80211_STYPE_DEAUTH); | |
790 | skb_put(skb, 2); | |
791 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); | |
792 | ||
793 | ieee80211_sta_tx(dev, skb, 0); | |
794 | } | |
795 | ||
796 | ||
797 | static void ieee80211_send_disassoc(struct net_device *dev, | |
798 | struct ieee80211_if_sta *ifsta, u16 reason) | |
799 | { | |
800 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
801 | struct sk_buff *skb; | |
802 | struct ieee80211_mgmt *mgmt; | |
803 | ||
804 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); | |
805 | if (!skb) { | |
806 | printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc " | |
807 | "frame\n", dev->name); | |
808 | return; | |
809 | } | |
810 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
811 | ||
812 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
813 | memset(mgmt, 0, 24); | |
814 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
815 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
816 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
817 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
818 | IEEE80211_STYPE_DISASSOC); | |
819 | skb_put(skb, 2); | |
820 | mgmt->u.disassoc.reason_code = cpu_to_le16(reason); | |
821 | ||
822 | ieee80211_sta_tx(dev, skb, 0); | |
823 | } | |
824 | ||
825 | ||
826 | static int ieee80211_privacy_mismatch(struct net_device *dev, | |
827 | struct ieee80211_if_sta *ifsta) | |
828 | { | |
65c107ab | 829 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
f0706e82 | 830 | struct ieee80211_sta_bss *bss; |
5b98b1f7 JB |
831 | int bss_privacy; |
832 | int wep_privacy; | |
833 | int privacy_invoked; | |
f0706e82 | 834 | |
5b98b1f7 | 835 | if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL)) |
f0706e82 JB |
836 | return 0; |
837 | ||
8318d78a JB |
838 | bss = ieee80211_rx_bss_get(dev, ifsta->bssid, |
839 | local->hw.conf.channel->center_freq, | |
cffdd30d | 840 | ifsta->ssid, ifsta->ssid_len); |
f0706e82 JB |
841 | if (!bss) |
842 | return 0; | |
843 | ||
5b98b1f7 JB |
844 | bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY); |
845 | wep_privacy = !!ieee80211_sta_wep_configured(dev); | |
846 | privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED); | |
f0706e82 JB |
847 | |
848 | ieee80211_rx_bss_put(dev, bss); | |
849 | ||
5b98b1f7 JB |
850 | if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked)) |
851 | return 0; | |
852 | ||
853 | return 1; | |
f0706e82 JB |
854 | } |
855 | ||
856 | ||
857 | static void ieee80211_associate(struct net_device *dev, | |
858 | struct ieee80211_if_sta *ifsta) | |
859 | { | |
0795af57 JP |
860 | DECLARE_MAC_BUF(mac); |
861 | ||
f0706e82 JB |
862 | ifsta->assoc_tries++; |
863 | if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) { | |
0795af57 | 864 | printk(KERN_DEBUG "%s: association with AP %s" |
f0706e82 | 865 | " timed out\n", |
0795af57 | 866 | dev->name, print_mac(mac, ifsta->bssid)); |
f0706e82 JB |
867 | ifsta->state = IEEE80211_DISABLED; |
868 | return; | |
869 | } | |
870 | ||
871 | ifsta->state = IEEE80211_ASSOCIATE; | |
0795af57 JP |
872 | printk(KERN_DEBUG "%s: associate with AP %s\n", |
873 | dev->name, print_mac(mac, ifsta->bssid)); | |
f0706e82 JB |
874 | if (ieee80211_privacy_mismatch(dev, ifsta)) { |
875 | printk(KERN_DEBUG "%s: mismatch in privacy configuration and " | |
876 | "mixed-cell disabled - abort association\n", dev->name); | |
877 | ifsta->state = IEEE80211_DISABLED; | |
878 | return; | |
879 | } | |
880 | ||
881 | ieee80211_send_assoc(dev, ifsta); | |
882 | ||
883 | mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT); | |
884 | } | |
885 | ||
886 | ||
887 | static void ieee80211_associated(struct net_device *dev, | |
888 | struct ieee80211_if_sta *ifsta) | |
889 | { | |
890 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
891 | struct sta_info *sta; | |
892 | int disassoc; | |
0795af57 | 893 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
894 | |
895 | /* TODO: start monitoring current AP signal quality and number of | |
896 | * missed beacons. Scan other channels every now and then and search | |
897 | * for better APs. */ | |
898 | /* TODO: remove expired BSSes */ | |
899 | ||
900 | ifsta->state = IEEE80211_ASSOCIATED; | |
901 | ||
d0709a65 JB |
902 | rcu_read_lock(); |
903 | ||
f0706e82 JB |
904 | sta = sta_info_get(local, ifsta->bssid); |
905 | if (!sta) { | |
0795af57 JP |
906 | printk(KERN_DEBUG "%s: No STA entry for own AP %s\n", |
907 | dev->name, print_mac(mac, ifsta->bssid)); | |
f0706e82 JB |
908 | disassoc = 1; |
909 | } else { | |
910 | disassoc = 0; | |
911 | if (time_after(jiffies, | |
912 | sta->last_rx + IEEE80211_MONITORING_INTERVAL)) { | |
d6f2da5b | 913 | if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) { |
f0706e82 | 914 | printk(KERN_DEBUG "%s: No ProbeResp from " |
0795af57 | 915 | "current AP %s - assume out of " |
f0706e82 | 916 | "range\n", |
0795af57 | 917 | dev->name, print_mac(mac, ifsta->bssid)); |
f0706e82 | 918 | disassoc = 1; |
d0709a65 | 919 | sta_info_unlink(&sta); |
d6f2da5b | 920 | } else |
f0706e82 JB |
921 | ieee80211_send_probe_req(dev, ifsta->bssid, |
922 | local->scan_ssid, | |
923 | local->scan_ssid_len); | |
d6f2da5b | 924 | ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL; |
f0706e82 | 925 | } else { |
d6f2da5b | 926 | ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL; |
f0706e82 JB |
927 | if (time_after(jiffies, ifsta->last_probe + |
928 | IEEE80211_PROBE_INTERVAL)) { | |
929 | ifsta->last_probe = jiffies; | |
930 | ieee80211_send_probe_req(dev, ifsta->bssid, | |
931 | ifsta->ssid, | |
932 | ifsta->ssid_len); | |
933 | } | |
934 | } | |
f0706e82 | 935 | } |
d0709a65 JB |
936 | |
937 | rcu_read_unlock(); | |
938 | ||
939 | if (disassoc && sta) { | |
d0709a65 JB |
940 | rtnl_lock(); |
941 | sta_info_destroy(sta); | |
942 | rtnl_unlock(); | |
943 | } | |
944 | ||
f0706e82 | 945 | if (disassoc) { |
2d192d95 MW |
946 | ifsta->state = IEEE80211_DISABLED; |
947 | ieee80211_set_associated(dev, ifsta, 0); | |
f0706e82 JB |
948 | } else { |
949 | mod_timer(&ifsta->timer, jiffies + | |
950 | IEEE80211_MONITORING_INTERVAL); | |
951 | } | |
952 | } | |
953 | ||
954 | ||
955 | static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst, | |
956 | u8 *ssid, size_t ssid_len) | |
957 | { | |
958 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
8318d78a | 959 | struct ieee80211_supported_band *sband; |
f0706e82 JB |
960 | struct sk_buff *skb; |
961 | struct ieee80211_mgmt *mgmt; | |
962 | u8 *pos, *supp_rates, *esupp_rates = NULL; | |
963 | int i; | |
964 | ||
965 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200); | |
966 | if (!skb) { | |
967 | printk(KERN_DEBUG "%s: failed to allocate buffer for probe " | |
968 | "request\n", dev->name); | |
969 | return; | |
970 | } | |
971 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
972 | ||
973 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
974 | memset(mgmt, 0, 24); | |
975 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
976 | IEEE80211_STYPE_PROBE_REQ); | |
977 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
978 | if (dst) { | |
979 | memcpy(mgmt->da, dst, ETH_ALEN); | |
980 | memcpy(mgmt->bssid, dst, ETH_ALEN); | |
981 | } else { | |
982 | memset(mgmt->da, 0xff, ETH_ALEN); | |
983 | memset(mgmt->bssid, 0xff, ETH_ALEN); | |
984 | } | |
985 | pos = skb_put(skb, 2 + ssid_len); | |
986 | *pos++ = WLAN_EID_SSID; | |
987 | *pos++ = ssid_len; | |
988 | memcpy(pos, ssid, ssid_len); | |
989 | ||
990 | supp_rates = skb_put(skb, 2); | |
991 | supp_rates[0] = WLAN_EID_SUPP_RATES; | |
992 | supp_rates[1] = 0; | |
8318d78a JB |
993 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
994 | ||
995 | for (i = 0; i < sband->n_bitrates; i++) { | |
996 | struct ieee80211_rate *rate = &sband->bitrates[i]; | |
f0706e82 JB |
997 | if (esupp_rates) { |
998 | pos = skb_put(skb, 1); | |
999 | esupp_rates[1]++; | |
1000 | } else if (supp_rates[1] == 8) { | |
1001 | esupp_rates = skb_put(skb, 3); | |
1002 | esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES; | |
1003 | esupp_rates[1] = 1; | |
1004 | pos = &esupp_rates[2]; | |
1005 | } else { | |
1006 | pos = skb_put(skb, 1); | |
1007 | supp_rates[1]++; | |
1008 | } | |
8318d78a | 1009 | *pos = rate->bitrate / 5; |
f0706e82 JB |
1010 | } |
1011 | ||
1012 | ieee80211_sta_tx(dev, skb, 0); | |
1013 | } | |
1014 | ||
1015 | ||
1016 | static int ieee80211_sta_wep_configured(struct net_device *dev) | |
1017 | { | |
1018 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1019 | if (!sdata || !sdata->default_key || | |
8f20fc24 | 1020 | sdata->default_key->conf.alg != ALG_WEP) |
f0706e82 JB |
1021 | return 0; |
1022 | return 1; | |
1023 | } | |
1024 | ||
1025 | ||
1026 | static void ieee80211_auth_completed(struct net_device *dev, | |
1027 | struct ieee80211_if_sta *ifsta) | |
1028 | { | |
1029 | printk(KERN_DEBUG "%s: authenticated\n", dev->name); | |
d6f2da5b | 1030 | ifsta->flags |= IEEE80211_STA_AUTHENTICATED; |
f0706e82 JB |
1031 | ieee80211_associate(dev, ifsta); |
1032 | } | |
1033 | ||
1034 | ||
1035 | static void ieee80211_auth_challenge(struct net_device *dev, | |
1036 | struct ieee80211_if_sta *ifsta, | |
1037 | struct ieee80211_mgmt *mgmt, | |
1038 | size_t len) | |
1039 | { | |
1040 | u8 *pos; | |
1041 | struct ieee802_11_elems elems; | |
1042 | ||
1043 | printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name); | |
1044 | pos = mgmt->u.auth.variable; | |
67a4cce4 | 1045 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
f0706e82 JB |
1046 | if (!elems.challenge) { |
1047 | printk(KERN_DEBUG "%s: no challenge IE in shared key auth " | |
1048 | "frame\n", dev->name); | |
1049 | return; | |
1050 | } | |
1051 | ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2, | |
1052 | elems.challenge_len + 2, 1); | |
1053 | } | |
1054 | ||
9f985b0e RR |
1055 | static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid, |
1056 | u8 dialog_token, u16 status, u16 policy, | |
1057 | u16 buf_size, u16 timeout) | |
1058 | { | |
1059 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1060 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
1061 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1062 | struct sk_buff *skb; | |
1063 | struct ieee80211_mgmt *mgmt; | |
1064 | u16 capab; | |
1065 | ||
07db2183 RR |
1066 | skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 + |
1067 | sizeof(mgmt->u.action.u.addba_resp)); | |
9f985b0e RR |
1068 | if (!skb) { |
1069 | printk(KERN_DEBUG "%s: failed to allocate buffer " | |
1070 | "for addba resp frame\n", dev->name); | |
1071 | return; | |
1072 | } | |
1073 | ||
1074 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1075 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
1076 | memset(mgmt, 0, 24); | |
1077 | memcpy(mgmt->da, da, ETH_ALEN); | |
1078 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
51fb61e7 | 1079 | if (sdata->vif.type == IEEE80211_IF_TYPE_AP) |
9f985b0e RR |
1080 | memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN); |
1081 | else | |
1082 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
1083 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
1084 | IEEE80211_STYPE_ACTION); | |
1085 | ||
1086 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp)); | |
1087 | mgmt->u.action.category = WLAN_CATEGORY_BACK; | |
1088 | mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP; | |
1089 | mgmt->u.action.u.addba_resp.dialog_token = dialog_token; | |
1090 | ||
1091 | capab = (u16)(policy << 1); /* bit 1 aggregation policy */ | |
1092 | capab |= (u16)(tid << 2); /* bit 5:2 TID number */ | |
1093 | capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */ | |
1094 | ||
1095 | mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab); | |
1096 | mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout); | |
1097 | mgmt->u.action.u.addba_resp.status = cpu_to_le16(status); | |
1098 | ||
1099 | ieee80211_sta_tx(dev, skb, 0); | |
1100 | ||
1101 | return; | |
1102 | } | |
1103 | ||
eadc8d9e RR |
1104 | void ieee80211_send_addba_request(struct net_device *dev, const u8 *da, |
1105 | u16 tid, u8 dialog_token, u16 start_seq_num, | |
1106 | u16 agg_size, u16 timeout) | |
1107 | { | |
1108 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1109 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1110 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
1111 | struct sk_buff *skb; | |
1112 | struct ieee80211_mgmt *mgmt; | |
1113 | u16 capab; | |
1114 | ||
1115 | skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 + | |
1116 | sizeof(mgmt->u.action.u.addba_req)); | |
1117 | ||
1118 | ||
1119 | if (!skb) { | |
1120 | printk(KERN_ERR "%s: failed to allocate buffer " | |
1121 | "for addba request frame\n", dev->name); | |
1122 | return; | |
1123 | } | |
1124 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1125 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
1126 | memset(mgmt, 0, 24); | |
1127 | memcpy(mgmt->da, da, ETH_ALEN); | |
1128 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
1129 | if (sdata->vif.type == IEEE80211_IF_TYPE_AP) | |
1130 | memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN); | |
1131 | else | |
1132 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
1133 | ||
1134 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
1135 | IEEE80211_STYPE_ACTION); | |
1136 | ||
1137 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req)); | |
1138 | ||
1139 | mgmt->u.action.category = WLAN_CATEGORY_BACK; | |
1140 | mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ; | |
1141 | ||
1142 | mgmt->u.action.u.addba_req.dialog_token = dialog_token; | |
1143 | capab = (u16)(1 << 1); /* bit 1 aggregation policy */ | |
1144 | capab |= (u16)(tid << 2); /* bit 5:2 TID number */ | |
1145 | capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */ | |
1146 | ||
1147 | mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab); | |
1148 | ||
1149 | mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout); | |
1150 | mgmt->u.action.u.addba_req.start_seq_num = | |
1151 | cpu_to_le16(start_seq_num << 4); | |
1152 | ||
1153 | ieee80211_sta_tx(dev, skb, 0); | |
1154 | } | |
1155 | ||
9f985b0e RR |
1156 | static void ieee80211_sta_process_addba_request(struct net_device *dev, |
1157 | struct ieee80211_mgmt *mgmt, | |
1158 | size_t len) | |
1159 | { | |
1160 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
07db2183 RR |
1161 | struct ieee80211_hw *hw = &local->hw; |
1162 | struct ieee80211_conf *conf = &hw->conf; | |
9f985b0e | 1163 | struct sta_info *sta; |
07db2183 RR |
1164 | struct tid_ampdu_rx *tid_agg_rx; |
1165 | u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status; | |
9f985b0e | 1166 | u8 dialog_token; |
07db2183 RR |
1167 | int ret = -EOPNOTSUPP; |
1168 | DECLARE_MAC_BUF(mac); | |
9f985b0e | 1169 | |
d0709a65 JB |
1170 | rcu_read_lock(); |
1171 | ||
9f985b0e | 1172 | sta = sta_info_get(local, mgmt->sa); |
d0709a65 JB |
1173 | if (!sta) { |
1174 | rcu_read_unlock(); | |
9f985b0e | 1175 | return; |
d0709a65 | 1176 | } |
9f985b0e RR |
1177 | |
1178 | /* extract session parameters from addba request frame */ | |
1179 | dialog_token = mgmt->u.action.u.addba_req.dialog_token; | |
1180 | timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout); | |
07db2183 RR |
1181 | start_seq_num = |
1182 | le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4; | |
9f985b0e RR |
1183 | |
1184 | capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab); | |
1185 | ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1; | |
1186 | tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2; | |
1187 | buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6; | |
1188 | ||
9f985b0e RR |
1189 | status = WLAN_STATUS_REQUEST_DECLINED; |
1190 | ||
07db2183 RR |
1191 | /* sanity check for incoming parameters: |
1192 | * check if configuration can support the BA policy | |
1193 | * and if buffer size does not exceeds max value */ | |
1194 | if (((ba_policy != 1) | |
1195 | && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA))) | |
1196 | || (buf_size > IEEE80211_MAX_AMPDU_BUF)) { | |
1197 | status = WLAN_STATUS_INVALID_QOS_PARAM; | |
1198 | #ifdef CONFIG_MAC80211_HT_DEBUG | |
1199 | if (net_ratelimit()) | |
7b9d44cd | 1200 | printk(KERN_DEBUG "AddBA Req with bad params from " |
07db2183 RR |
1201 | "%s on tid %u. policy %d, buffer size %d\n", |
1202 | print_mac(mac, mgmt->sa), tid, ba_policy, | |
1203 | buf_size); | |
1204 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1205 | goto end_no_lock; | |
1206 | } | |
1207 | /* determine default buffer size */ | |
1208 | if (buf_size == 0) { | |
8318d78a JB |
1209 | struct ieee80211_supported_band *sband; |
1210 | ||
1211 | sband = local->hw.wiphy->bands[conf->channel->band]; | |
07db2183 | 1212 | buf_size = IEEE80211_MIN_AMPDU_BUF; |
8318d78a | 1213 | buf_size = buf_size << sband->ht_info.ampdu_factor; |
07db2183 RR |
1214 | } |
1215 | ||
07db2183 RR |
1216 | |
1217 | /* examine state machine */ | |
1218 | spin_lock_bh(&sta->ampdu_mlme.ampdu_rx); | |
1219 | ||
cee24a3e | 1220 | if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) { |
07db2183 RR |
1221 | #ifdef CONFIG_MAC80211_HT_DEBUG |
1222 | if (net_ratelimit()) | |
7b9d44cd | 1223 | printk(KERN_DEBUG "unexpected AddBA Req from " |
07db2183 RR |
1224 | "%s on tid %u\n", |
1225 | print_mac(mac, mgmt->sa), tid); | |
1226 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1227 | goto end; | |
1228 | } | |
1229 | ||
cee24a3e RR |
1230 | /* prepare A-MPDU MLME for Rx aggregation */ |
1231 | sta->ampdu_mlme.tid_rx[tid] = | |
1232 | kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC); | |
1233 | if (!sta->ampdu_mlme.tid_rx[tid]) { | |
1234 | if (net_ratelimit()) | |
1235 | printk(KERN_ERR "allocate rx mlme to tid %d failed\n", | |
1236 | tid); | |
1237 | goto end; | |
1238 | } | |
1239 | /* rx timer */ | |
1240 | sta->ampdu_mlme.tid_rx[tid]->session_timer.function = | |
1241 | sta_rx_agg_session_timer_expired; | |
1242 | sta->ampdu_mlme.tid_rx[tid]->session_timer.data = | |
1243 | (unsigned long)&sta->timer_to_tid[tid]; | |
1244 | init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer); | |
1245 | ||
1246 | tid_agg_rx = sta->ampdu_mlme.tid_rx[tid]; | |
1247 | ||
07db2183 RR |
1248 | /* prepare reordering buffer */ |
1249 | tid_agg_rx->reorder_buf = | |
1250 | kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC); | |
03147dfc JB |
1251 | if (!tid_agg_rx->reorder_buf) { |
1252 | if (net_ratelimit()) | |
1253 | printk(KERN_ERR "can not allocate reordering buffer " | |
1254 | "to tid %d\n", tid); | |
cee24a3e | 1255 | kfree(sta->ampdu_mlme.tid_rx[tid]); |
07db2183 RR |
1256 | goto end; |
1257 | } | |
1258 | memset(tid_agg_rx->reorder_buf, 0, | |
1259 | buf_size * sizeof(struct sk_buf *)); | |
1260 | ||
1261 | if (local->ops->ampdu_action) | |
1262 | ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START, | |
0df3ef45 | 1263 | sta->addr, tid, &start_seq_num); |
07db2183 RR |
1264 | #ifdef CONFIG_MAC80211_HT_DEBUG |
1265 | printk(KERN_DEBUG "Rx A-MPDU on tid %d result %d", tid, ret); | |
1266 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1267 | ||
1268 | if (ret) { | |
1269 | kfree(tid_agg_rx->reorder_buf); | |
cee24a3e RR |
1270 | kfree(tid_agg_rx); |
1271 | sta->ampdu_mlme.tid_rx[tid] = NULL; | |
07db2183 RR |
1272 | goto end; |
1273 | } | |
1274 | ||
1275 | /* change state and send addba resp */ | |
cee24a3e | 1276 | sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL; |
07db2183 RR |
1277 | tid_agg_rx->dialog_token = dialog_token; |
1278 | tid_agg_rx->ssn = start_seq_num; | |
1279 | tid_agg_rx->head_seq_num = start_seq_num; | |
1280 | tid_agg_rx->buf_size = buf_size; | |
1281 | tid_agg_rx->timeout = timeout; | |
1282 | tid_agg_rx->stored_mpdu_num = 0; | |
1283 | status = WLAN_STATUS_SUCCESS; | |
1284 | end: | |
1285 | spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx); | |
1286 | ||
1287 | end_no_lock: | |
d0709a65 JB |
1288 | ieee80211_send_addba_resp(sta->sdata->dev, sta->addr, tid, |
1289 | dialog_token, status, 1, buf_size, timeout); | |
1290 | rcu_read_unlock(); | |
9f985b0e | 1291 | } |
f0706e82 | 1292 | |
eadc8d9e RR |
1293 | static void ieee80211_sta_process_addba_resp(struct net_device *dev, |
1294 | struct ieee80211_mgmt *mgmt, | |
1295 | size_t len) | |
1296 | { | |
1297 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1298 | struct ieee80211_hw *hw = &local->hw; | |
1299 | struct sta_info *sta; | |
1300 | u16 capab; | |
1301 | u16 tid; | |
1302 | u8 *state; | |
1303 | ||
d0709a65 JB |
1304 | rcu_read_lock(); |
1305 | ||
eadc8d9e | 1306 | sta = sta_info_get(local, mgmt->sa); |
d0709a65 JB |
1307 | if (!sta) { |
1308 | rcu_read_unlock(); | |
eadc8d9e | 1309 | return; |
d0709a65 | 1310 | } |
eadc8d9e RR |
1311 | |
1312 | capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab); | |
1313 | tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2; | |
1314 | ||
cee24a3e | 1315 | state = &sta->ampdu_mlme.tid_state_tx[tid]; |
eadc8d9e RR |
1316 | |
1317 | spin_lock_bh(&sta->ampdu_mlme.ampdu_tx); | |
1318 | ||
cee24a3e RR |
1319 | if (!(*state & HT_ADDBA_REQUESTED_MSK)) { |
1320 | spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx); | |
1321 | printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:" | |
1322 | "%d\n", *state); | |
1323 | goto addba_resp_exit; | |
1324 | } | |
1325 | ||
eadc8d9e | 1326 | if (mgmt->u.action.u.addba_resp.dialog_token != |
cee24a3e | 1327 | sta->ampdu_mlme.tid_tx[tid]->dialog_token) { |
eadc8d9e RR |
1328 | spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx); |
1329 | #ifdef CONFIG_MAC80211_HT_DEBUG | |
1330 | printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid); | |
1331 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
cee24a3e | 1332 | goto addba_resp_exit; |
eadc8d9e RR |
1333 | } |
1334 | ||
cee24a3e | 1335 | del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer); |
eadc8d9e RR |
1336 | #ifdef CONFIG_MAC80211_HT_DEBUG |
1337 | printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid); | |
1338 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1339 | if (le16_to_cpu(mgmt->u.action.u.addba_resp.status) | |
1340 | == WLAN_STATUS_SUCCESS) { | |
eadc8d9e RR |
1341 | if (*state & HT_ADDBA_RECEIVED_MSK) |
1342 | printk(KERN_DEBUG "double addBA response\n"); | |
1343 | ||
1344 | *state |= HT_ADDBA_RECEIVED_MSK; | |
cee24a3e | 1345 | sta->ampdu_mlme.addba_req_num[tid] = 0; |
eadc8d9e RR |
1346 | |
1347 | if (*state == HT_AGG_STATE_OPERATIONAL) { | |
1348 | printk(KERN_DEBUG "Aggregation on for tid %d \n", tid); | |
1349 | ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]); | |
1350 | } | |
1351 | ||
1352 | spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx); | |
1353 | printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid); | |
1354 | } else { | |
1355 | printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid); | |
1356 | ||
cee24a3e | 1357 | sta->ampdu_mlme.addba_req_num[tid]++; |
eadc8d9e RR |
1358 | /* this will allow the state check in stop_BA_session */ |
1359 | *state = HT_AGG_STATE_OPERATIONAL; | |
1360 | spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx); | |
1361 | ieee80211_stop_tx_ba_session(hw, sta->addr, tid, | |
1362 | WLAN_BACK_INITIATOR); | |
1363 | } | |
cee24a3e RR |
1364 | |
1365 | addba_resp_exit: | |
d0709a65 | 1366 | rcu_read_unlock(); |
eadc8d9e RR |
1367 | } |
1368 | ||
1369 | void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid, | |
1370 | u16 initiator, u16 reason_code) | |
07db2183 RR |
1371 | { |
1372 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1373 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1374 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
1375 | struct sk_buff *skb; | |
1376 | struct ieee80211_mgmt *mgmt; | |
1377 | u16 params; | |
1378 | ||
1379 | skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 + | |
1380 | sizeof(mgmt->u.action.u.delba)); | |
1381 | ||
1382 | if (!skb) { | |
1383 | printk(KERN_ERR "%s: failed to allocate buffer " | |
1384 | "for delba frame\n", dev->name); | |
1385 | return; | |
1386 | } | |
1387 | ||
1388 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1389 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
1390 | memset(mgmt, 0, 24); | |
1391 | memcpy(mgmt->da, da, ETH_ALEN); | |
1392 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
51fb61e7 | 1393 | if (sdata->vif.type == IEEE80211_IF_TYPE_AP) |
07db2183 RR |
1394 | memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN); |
1395 | else | |
1396 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
1397 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
1398 | IEEE80211_STYPE_ACTION); | |
1399 | ||
1400 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba)); | |
1401 | ||
1402 | mgmt->u.action.category = WLAN_CATEGORY_BACK; | |
1403 | mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA; | |
1404 | params = (u16)(initiator << 11); /* bit 11 initiator */ | |
1405 | params |= (u16)(tid << 12); /* bit 15:12 TID number */ | |
1406 | ||
1407 | mgmt->u.action.u.delba.params = cpu_to_le16(params); | |
1408 | mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code); | |
1409 | ||
1410 | ieee80211_sta_tx(dev, skb, 0); | |
1411 | } | |
1412 | ||
1413 | void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid, | |
1414 | u16 initiator, u16 reason) | |
1415 | { | |
1416 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1417 | struct ieee80211_hw *hw = &local->hw; | |
1418 | struct sta_info *sta; | |
b580781e | 1419 | int ret, i; |
07db2183 | 1420 | |
d0709a65 JB |
1421 | rcu_read_lock(); |
1422 | ||
07db2183 | 1423 | sta = sta_info_get(local, ra); |
d0709a65 JB |
1424 | if (!sta) { |
1425 | rcu_read_unlock(); | |
07db2183 | 1426 | return; |
d0709a65 | 1427 | } |
07db2183 RR |
1428 | |
1429 | /* check if TID is in operational state */ | |
1430 | spin_lock_bh(&sta->ampdu_mlme.ampdu_rx); | |
cee24a3e | 1431 | if (sta->ampdu_mlme.tid_state_rx[tid] |
07db2183 RR |
1432 | != HT_AGG_STATE_OPERATIONAL) { |
1433 | spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx); | |
d0709a65 | 1434 | rcu_read_unlock(); |
07db2183 RR |
1435 | return; |
1436 | } | |
cee24a3e | 1437 | sta->ampdu_mlme.tid_state_rx[tid] = |
07db2183 RR |
1438 | HT_AGG_STATE_REQ_STOP_BA_MSK | |
1439 | (initiator << HT_AGG_STATE_INITIATOR_SHIFT); | |
1440 | spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx); | |
1441 | ||
1442 | /* stop HW Rx aggregation. ampdu_action existence | |
1443 | * already verified in session init so we add the BUG_ON */ | |
1444 | BUG_ON(!local->ops->ampdu_action); | |
1445 | ||
1446 | ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP, | |
0df3ef45 | 1447 | ra, tid, NULL); |
07db2183 RR |
1448 | if (ret) |
1449 | printk(KERN_DEBUG "HW problem - can not stop rx " | |
1450 | "aggergation for tid %d\n", tid); | |
1451 | ||
1452 | /* shutdown timer has not expired */ | |
1453 | if (initiator != WLAN_BACK_TIMER) | |
cee24a3e | 1454 | del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer); |
07db2183 RR |
1455 | |
1456 | /* check if this is a self generated aggregation halt */ | |
1457 | if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER) | |
1458 | ieee80211_send_delba(dev, ra, tid, 0, reason); | |
1459 | ||
1460 | /* free the reordering buffer */ | |
cee24a3e RR |
1461 | for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) { |
1462 | if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) { | |
b580781e | 1463 | /* release the reordered frames */ |
cee24a3e RR |
1464 | dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]); |
1465 | sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--; | |
1466 | sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL; | |
b580781e RR |
1467 | } |
1468 | } | |
cee24a3e RR |
1469 | /* free resources */ |
1470 | kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf); | |
1471 | kfree(sta->ampdu_mlme.tid_rx[tid]); | |
1472 | sta->ampdu_mlme.tid_rx[tid] = NULL; | |
1473 | sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE; | |
07db2183 | 1474 | |
d0709a65 | 1475 | rcu_read_unlock(); |
07db2183 RR |
1476 | } |
1477 | ||
eadc8d9e | 1478 | |
688b88a4 RR |
1479 | static void ieee80211_sta_process_delba(struct net_device *dev, |
1480 | struct ieee80211_mgmt *mgmt, size_t len) | |
1481 | { | |
1482 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1483 | struct sta_info *sta; | |
1484 | u16 tid, params; | |
1485 | u16 initiator; | |
1486 | DECLARE_MAC_BUF(mac); | |
1487 | ||
d0709a65 JB |
1488 | rcu_read_lock(); |
1489 | ||
688b88a4 | 1490 | sta = sta_info_get(local, mgmt->sa); |
d0709a65 JB |
1491 | if (!sta) { |
1492 | rcu_read_unlock(); | |
688b88a4 | 1493 | return; |
d0709a65 | 1494 | } |
688b88a4 RR |
1495 | |
1496 | params = le16_to_cpu(mgmt->u.action.u.delba.params); | |
1497 | tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12; | |
1498 | initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11; | |
1499 | ||
1500 | #ifdef CONFIG_MAC80211_HT_DEBUG | |
1501 | if (net_ratelimit()) | |
d92684e6 RR |
1502 | printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n", |
1503 | print_mac(mac, mgmt->sa), | |
2e354ed7 | 1504 | initiator ? "initiator" : "recipient", tid, |
688b88a4 RR |
1505 | mgmt->u.action.u.delba.reason_code); |
1506 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1507 | ||
1508 | if (initiator == WLAN_BACK_INITIATOR) | |
1509 | ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid, | |
1510 | WLAN_BACK_INITIATOR, 0); | |
d92684e6 RR |
1511 | else { /* WLAN_BACK_RECIPIENT */ |
1512 | spin_lock_bh(&sta->ampdu_mlme.ampdu_tx); | |
cee24a3e | 1513 | sta->ampdu_mlme.tid_state_tx[tid] = |
d92684e6 RR |
1514 | HT_AGG_STATE_OPERATIONAL; |
1515 | spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx); | |
1516 | ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid, | |
1517 | WLAN_BACK_RECIPIENT); | |
1518 | } | |
d0709a65 | 1519 | rcu_read_unlock(); |
688b88a4 RR |
1520 | } |
1521 | ||
eadc8d9e RR |
1522 | /* |
1523 | * After sending add Block Ack request we activated a timer until | |
1524 | * add Block Ack response will arrive from the recipient. | |
1525 | * If this timer expires sta_addba_resp_timer_expired will be executed. | |
1526 | */ | |
1527 | void sta_addba_resp_timer_expired(unsigned long data) | |
1528 | { | |
1529 | /* not an elegant detour, but there is no choice as the timer passes | |
1530 | * only one argument, and both sta_info and TID are needed, so init | |
73651ee6 | 1531 | * flow in sta_info_create gives the TID as data, while the timer_to_id |
eadc8d9e RR |
1532 | * array gives the sta through container_of */ |
1533 | u16 tid = *(int *)data; | |
1534 | struct sta_info *temp_sta = container_of((void *)data, | |
1535 | struct sta_info, timer_to_tid[tid]); | |
1536 | ||
1537 | struct ieee80211_local *local = temp_sta->local; | |
1538 | struct ieee80211_hw *hw = &local->hw; | |
1539 | struct sta_info *sta; | |
1540 | u8 *state; | |
1541 | ||
d0709a65 JB |
1542 | rcu_read_lock(); |
1543 | ||
eadc8d9e | 1544 | sta = sta_info_get(local, temp_sta->addr); |
d0709a65 JB |
1545 | if (!sta) { |
1546 | rcu_read_unlock(); | |
eadc8d9e | 1547 | return; |
d0709a65 | 1548 | } |
eadc8d9e | 1549 | |
cee24a3e | 1550 | state = &sta->ampdu_mlme.tid_state_tx[tid]; |
eadc8d9e RR |
1551 | /* check if the TID waits for addBA response */ |
1552 | spin_lock_bh(&sta->ampdu_mlme.ampdu_tx); | |
1553 | if (!(*state & HT_ADDBA_REQUESTED_MSK)) { | |
1554 | spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx); | |
1555 | *state = HT_AGG_STATE_IDLE; | |
1556 | printk(KERN_DEBUG "timer expired on tid %d but we are not " | |
1557 | "expecting addBA response there", tid); | |
1558 | goto timer_expired_exit; | |
1559 | } | |
1560 | ||
1561 | printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid); | |
1562 | ||
1563 | /* go through the state check in stop_BA_session */ | |
1564 | *state = HT_AGG_STATE_OPERATIONAL; | |
1565 | spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx); | |
1566 | ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid, | |
1567 | WLAN_BACK_INITIATOR); | |
1568 | ||
1569 | timer_expired_exit: | |
d0709a65 | 1570 | rcu_read_unlock(); |
eadc8d9e RR |
1571 | } |
1572 | ||
07db2183 | 1573 | /* |
7b9d44cd RR |
1574 | * After accepting the AddBA Request we activated a timer, |
1575 | * resetting it after each frame that arrives from the originator. | |
07db2183 RR |
1576 | * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed. |
1577 | */ | |
1578 | void sta_rx_agg_session_timer_expired(unsigned long data) | |
1579 | { | |
1580 | /* not an elegant detour, but there is no choice as the timer passes | |
1581 | * only one argument, and verious sta_info are needed here, so init | |
73651ee6 | 1582 | * flow in sta_info_create gives the TID as data, while the timer_to_id |
07db2183 RR |
1583 | * array gives the sta through container_of */ |
1584 | u8 *ptid = (u8 *)data; | |
1585 | u8 *timer_to_id = ptid - *ptid; | |
1586 | struct sta_info *sta = container_of(timer_to_id, struct sta_info, | |
1587 | timer_to_tid[0]); | |
1588 | ||
1589 | printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid); | |
d0709a65 JB |
1590 | ieee80211_sta_stop_rx_ba_session(sta->sdata->dev, sta->addr, |
1591 | (u16)*ptid, WLAN_BACK_TIMER, | |
07db2183 RR |
1592 | WLAN_REASON_QSTA_TIMEOUT); |
1593 | } | |
1594 | ||
85249e5f RR |
1595 | void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr) |
1596 | { | |
1597 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1598 | int i; | |
1599 | ||
1600 | for (i = 0; i < STA_TID_NUM; i++) { | |
1601 | ieee80211_stop_tx_ba_session(&local->hw, addr, i, | |
1602 | WLAN_BACK_INITIATOR); | |
1603 | ieee80211_sta_stop_rx_ba_session(dev, addr, i, | |
1604 | WLAN_BACK_RECIPIENT, | |
1605 | WLAN_REASON_QSTA_LEAVE_QBSS); | |
1606 | } | |
1607 | } | |
07db2183 | 1608 | |
f0706e82 JB |
1609 | static void ieee80211_rx_mgmt_auth(struct net_device *dev, |
1610 | struct ieee80211_if_sta *ifsta, | |
1611 | struct ieee80211_mgmt *mgmt, | |
1612 | size_t len) | |
1613 | { | |
1614 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1615 | u16 auth_alg, auth_transaction, status_code; | |
0795af57 | 1616 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
1617 | |
1618 | if (ifsta->state != IEEE80211_AUTHENTICATE && | |
51fb61e7 | 1619 | sdata->vif.type != IEEE80211_IF_TYPE_IBSS) { |
f0706e82 | 1620 | printk(KERN_DEBUG "%s: authentication frame received from " |
0795af57 JP |
1621 | "%s, but not in authenticate state - ignored\n", |
1622 | dev->name, print_mac(mac, mgmt->sa)); | |
f0706e82 JB |
1623 | return; |
1624 | } | |
1625 | ||
1626 | if (len < 24 + 6) { | |
1627 | printk(KERN_DEBUG "%s: too short (%zd) authentication frame " | |
0795af57 JP |
1628 | "received from %s - ignored\n", |
1629 | dev->name, len, print_mac(mac, mgmt->sa)); | |
f0706e82 JB |
1630 | return; |
1631 | } | |
1632 | ||
51fb61e7 | 1633 | if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS && |
f0706e82 JB |
1634 | memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) { |
1635 | printk(KERN_DEBUG "%s: authentication frame received from " | |
0795af57 JP |
1636 | "unknown AP (SA=%s BSSID=%s) - " |
1637 | "ignored\n", dev->name, print_mac(mac, mgmt->sa), | |
1638 | print_mac(mac, mgmt->bssid)); | |
f0706e82 JB |
1639 | return; |
1640 | } | |
1641 | ||
51fb61e7 | 1642 | if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS && |
f0706e82 JB |
1643 | memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) { |
1644 | printk(KERN_DEBUG "%s: authentication frame received from " | |
0795af57 JP |
1645 | "unknown BSSID (SA=%s BSSID=%s) - " |
1646 | "ignored\n", dev->name, print_mac(mac, mgmt->sa), | |
1647 | print_mac(mac, mgmt->bssid)); | |
f0706e82 JB |
1648 | return; |
1649 | } | |
1650 | ||
1651 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
1652 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
1653 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
1654 | ||
0795af57 | 1655 | printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d " |
f0706e82 | 1656 | "transaction=%d status=%d)\n", |
0795af57 | 1657 | dev->name, print_mac(mac, mgmt->sa), auth_alg, |
f0706e82 JB |
1658 | auth_transaction, status_code); |
1659 | ||
51fb61e7 | 1660 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) { |
f0706e82 JB |
1661 | /* IEEE 802.11 standard does not require authentication in IBSS |
1662 | * networks and most implementations do not seem to use it. | |
1663 | * However, try to reply to authentication attempts if someone | |
1664 | * has actually implemented this. | |
1665 | * TODO: Could implement shared key authentication. */ | |
1666 | if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) { | |
1667 | printk(KERN_DEBUG "%s: unexpected IBSS authentication " | |
1668 | "frame (alg=%d transaction=%d)\n", | |
1669 | dev->name, auth_alg, auth_transaction); | |
1670 | return; | |
1671 | } | |
1672 | ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0); | |
1673 | } | |
1674 | ||
1675 | if (auth_alg != ifsta->auth_alg || | |
1676 | auth_transaction != ifsta->auth_transaction) { | |
1677 | printk(KERN_DEBUG "%s: unexpected authentication frame " | |
1678 | "(alg=%d transaction=%d)\n", | |
1679 | dev->name, auth_alg, auth_transaction); | |
1680 | return; | |
1681 | } | |
1682 | ||
1683 | if (status_code != WLAN_STATUS_SUCCESS) { | |
1684 | printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d " | |
1685 | "code=%d)\n", dev->name, ifsta->auth_alg, status_code); | |
1686 | if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) { | |
1687 | u8 algs[3]; | |
1688 | const int num_algs = ARRAY_SIZE(algs); | |
1689 | int i, pos; | |
1690 | algs[0] = algs[1] = algs[2] = 0xff; | |
1691 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
1692 | algs[0] = WLAN_AUTH_OPEN; | |
1693 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
1694 | algs[1] = WLAN_AUTH_SHARED_KEY; | |
1695 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
1696 | algs[2] = WLAN_AUTH_LEAP; | |
1697 | if (ifsta->auth_alg == WLAN_AUTH_OPEN) | |
1698 | pos = 0; | |
1699 | else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY) | |
1700 | pos = 1; | |
1701 | else | |
1702 | pos = 2; | |
1703 | for (i = 0; i < num_algs; i++) { | |
1704 | pos++; | |
1705 | if (pos >= num_algs) | |
1706 | pos = 0; | |
1707 | if (algs[pos] == ifsta->auth_alg || | |
1708 | algs[pos] == 0xff) | |
1709 | continue; | |
1710 | if (algs[pos] == WLAN_AUTH_SHARED_KEY && | |
1711 | !ieee80211_sta_wep_configured(dev)) | |
1712 | continue; | |
1713 | ifsta->auth_alg = algs[pos]; | |
1714 | printk(KERN_DEBUG "%s: set auth_alg=%d for " | |
1715 | "next try\n", | |
1716 | dev->name, ifsta->auth_alg); | |
1717 | break; | |
1718 | } | |
1719 | } | |
1720 | return; | |
1721 | } | |
1722 | ||
1723 | switch (ifsta->auth_alg) { | |
1724 | case WLAN_AUTH_OPEN: | |
1725 | case WLAN_AUTH_LEAP: | |
1726 | ieee80211_auth_completed(dev, ifsta); | |
1727 | break; | |
1728 | case WLAN_AUTH_SHARED_KEY: | |
1729 | if (ifsta->auth_transaction == 4) | |
1730 | ieee80211_auth_completed(dev, ifsta); | |
1731 | else | |
1732 | ieee80211_auth_challenge(dev, ifsta, mgmt, len); | |
1733 | break; | |
1734 | } | |
1735 | } | |
1736 | ||
1737 | ||
1738 | static void ieee80211_rx_mgmt_deauth(struct net_device *dev, | |
1739 | struct ieee80211_if_sta *ifsta, | |
1740 | struct ieee80211_mgmt *mgmt, | |
1741 | size_t len) | |
1742 | { | |
1743 | u16 reason_code; | |
0795af57 | 1744 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
1745 | |
1746 | if (len < 24 + 2) { | |
1747 | printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame " | |
0795af57 JP |
1748 | "received from %s - ignored\n", |
1749 | dev->name, len, print_mac(mac, mgmt->sa)); | |
f0706e82 JB |
1750 | return; |
1751 | } | |
1752 | ||
1753 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) { | |
1754 | printk(KERN_DEBUG "%s: deauthentication frame received from " | |
0795af57 JP |
1755 | "unknown AP (SA=%s BSSID=%s) - " |
1756 | "ignored\n", dev->name, print_mac(mac, mgmt->sa), | |
1757 | print_mac(mac, mgmt->bssid)); | |
f0706e82 JB |
1758 | return; |
1759 | } | |
1760 | ||
1761 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
1762 | ||
0795af57 | 1763 | printk(KERN_DEBUG "%s: RX deauthentication from %s" |
f0706e82 | 1764 | " (reason=%d)\n", |
0795af57 | 1765 | dev->name, print_mac(mac, mgmt->sa), reason_code); |
f0706e82 | 1766 | |
d6f2da5b | 1767 | if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) { |
f0706e82 JB |
1768 | printk(KERN_DEBUG "%s: deauthenticated\n", dev->name); |
1769 | } | |
1770 | ||
1771 | if (ifsta->state == IEEE80211_AUTHENTICATE || | |
1772 | ifsta->state == IEEE80211_ASSOCIATE || | |
1773 | ifsta->state == IEEE80211_ASSOCIATED) { | |
1774 | ifsta->state = IEEE80211_AUTHENTICATE; | |
1775 | mod_timer(&ifsta->timer, jiffies + | |
1776 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1777 | } | |
1778 | ||
1779 | ieee80211_set_disassoc(dev, ifsta, 1); | |
d6f2da5b | 1780 | ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED; |
f0706e82 JB |
1781 | } |
1782 | ||
1783 | ||
1784 | static void ieee80211_rx_mgmt_disassoc(struct net_device *dev, | |
1785 | struct ieee80211_if_sta *ifsta, | |
1786 | struct ieee80211_mgmt *mgmt, | |
1787 | size_t len) | |
1788 | { | |
1789 | u16 reason_code; | |
0795af57 | 1790 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
1791 | |
1792 | if (len < 24 + 2) { | |
1793 | printk(KERN_DEBUG "%s: too short (%zd) disassociation frame " | |
0795af57 JP |
1794 | "received from %s - ignored\n", |
1795 | dev->name, len, print_mac(mac, mgmt->sa)); | |
f0706e82 JB |
1796 | return; |
1797 | } | |
1798 | ||
1799 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) { | |
1800 | printk(KERN_DEBUG "%s: disassociation frame received from " | |
0795af57 JP |
1801 | "unknown AP (SA=%s BSSID=%s) - " |
1802 | "ignored\n", dev->name, print_mac(mac, mgmt->sa), | |
1803 | print_mac(mac, mgmt->bssid)); | |
f0706e82 JB |
1804 | return; |
1805 | } | |
1806 | ||
1807 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
1808 | ||
0795af57 | 1809 | printk(KERN_DEBUG "%s: RX disassociation from %s" |
f0706e82 | 1810 | " (reason=%d)\n", |
0795af57 | 1811 | dev->name, print_mac(mac, mgmt->sa), reason_code); |
f0706e82 | 1812 | |
d6f2da5b | 1813 | if (ifsta->flags & IEEE80211_STA_ASSOCIATED) |
f0706e82 JB |
1814 | printk(KERN_DEBUG "%s: disassociated\n", dev->name); |
1815 | ||
1816 | if (ifsta->state == IEEE80211_ASSOCIATED) { | |
1817 | ifsta->state = IEEE80211_ASSOCIATE; | |
1818 | mod_timer(&ifsta->timer, jiffies + | |
1819 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1820 | } | |
1821 | ||
1822 | ieee80211_set_disassoc(dev, ifsta, 0); | |
1823 | } | |
1824 | ||
1825 | ||
471b3efd | 1826 | static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1827 | struct ieee80211_if_sta *ifsta, |
1828 | struct ieee80211_mgmt *mgmt, | |
1829 | size_t len, | |
1830 | int reassoc) | |
1831 | { | |
471b3efd JB |
1832 | struct ieee80211_local *local = sdata->local; |
1833 | struct net_device *dev = sdata->dev; | |
8318d78a | 1834 | struct ieee80211_supported_band *sband; |
f0706e82 | 1835 | struct sta_info *sta; |
8318d78a | 1836 | u64 rates, basic_rates; |
f0706e82 JB |
1837 | u16 capab_info, status_code, aid; |
1838 | struct ieee802_11_elems elems; | |
471b3efd | 1839 | struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf; |
f0706e82 JB |
1840 | u8 *pos; |
1841 | int i, j; | |
0795af57 | 1842 | DECLARE_MAC_BUF(mac); |
8318d78a | 1843 | bool have_higher_than_11mbit = false; |
f0706e82 JB |
1844 | |
1845 | /* AssocResp and ReassocResp have identical structure, so process both | |
1846 | * of them in this function. */ | |
1847 | ||
1848 | if (ifsta->state != IEEE80211_ASSOCIATE) { | |
1849 | printk(KERN_DEBUG "%s: association frame received from " | |
0795af57 JP |
1850 | "%s, but not in associate state - ignored\n", |
1851 | dev->name, print_mac(mac, mgmt->sa)); | |
f0706e82 JB |
1852 | return; |
1853 | } | |
1854 | ||
1855 | if (len < 24 + 6) { | |
1856 | printk(KERN_DEBUG "%s: too short (%zd) association frame " | |
0795af57 JP |
1857 | "received from %s - ignored\n", |
1858 | dev->name, len, print_mac(mac, mgmt->sa)); | |
f0706e82 JB |
1859 | return; |
1860 | } | |
1861 | ||
1862 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) { | |
1863 | printk(KERN_DEBUG "%s: association frame received from " | |
0795af57 JP |
1864 | "unknown AP (SA=%s BSSID=%s) - " |
1865 | "ignored\n", dev->name, print_mac(mac, mgmt->sa), | |
1866 | print_mac(mac, mgmt->bssid)); | |
f0706e82 JB |
1867 | return; |
1868 | } | |
1869 | ||
1870 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
1871 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
1872 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
f0706e82 | 1873 | |
0795af57 | 1874 | printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x " |
f0706e82 | 1875 | "status=%d aid=%d)\n", |
0795af57 | 1876 | dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa), |
ddd68587 | 1877 | capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); |
f0706e82 JB |
1878 | |
1879 | if (status_code != WLAN_STATUS_SUCCESS) { | |
1880 | printk(KERN_DEBUG "%s: AP denied association (code=%d)\n", | |
1881 | dev->name, status_code); | |
8a69aa93 DD |
1882 | /* if this was a reassociation, ensure we try a "full" |
1883 | * association next time. This works around some broken APs | |
1884 | * which do not correctly reject reassociation requests. */ | |
d6f2da5b | 1885 | ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
f0706e82 JB |
1886 | return; |
1887 | } | |
1888 | ||
1dd84aa2 JB |
1889 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
1890 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " | |
1891 | "set\n", dev->name, aid); | |
1892 | aid &= ~(BIT(15) | BIT(14)); | |
1893 | ||
f0706e82 | 1894 | pos = mgmt->u.assoc_resp.variable; |
67a4cce4 | 1895 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
f0706e82 JB |
1896 | |
1897 | if (!elems.supp_rates) { | |
1898 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", | |
1899 | dev->name); | |
1900 | return; | |
1901 | } | |
1902 | ||
1903 | printk(KERN_DEBUG "%s: associated\n", dev->name); | |
1904 | ifsta->aid = aid; | |
1905 | ifsta->ap_capab = capab_info; | |
1906 | ||
1907 | kfree(ifsta->assocresp_ies); | |
1908 | ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt); | |
0ec0b7ac | 1909 | ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL); |
f0706e82 JB |
1910 | if (ifsta->assocresp_ies) |
1911 | memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len); | |
1912 | ||
d0709a65 JB |
1913 | rcu_read_lock(); |
1914 | ||
f0706e82 JB |
1915 | /* Add STA entry for the AP */ |
1916 | sta = sta_info_get(local, ifsta->bssid); | |
1917 | if (!sta) { | |
1918 | struct ieee80211_sta_bss *bss; | |
73651ee6 | 1919 | int err; |
d0709a65 | 1920 | |
73651ee6 JB |
1921 | sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC); |
1922 | if (!sta) { | |
1923 | printk(KERN_DEBUG "%s: failed to alloc STA entry for" | |
1924 | " the AP\n", dev->name); | |
d0709a65 | 1925 | rcu_read_unlock(); |
f0706e82 JB |
1926 | return; |
1927 | } | |
65c107ab | 1928 | bss = ieee80211_rx_bss_get(dev, ifsta->bssid, |
8318d78a | 1929 | local->hw.conf.channel->center_freq, |
cffdd30d | 1930 | ifsta->ssid, ifsta->ssid_len); |
f0706e82 JB |
1931 | if (bss) { |
1932 | sta->last_rssi = bss->rssi; | |
1933 | sta->last_signal = bss->signal; | |
1934 | sta->last_noise = bss->noise; | |
1935 | ieee80211_rx_bss_put(dev, bss); | |
1936 | } | |
73651ee6 JB |
1937 | |
1938 | err = sta_info_insert(sta); | |
1939 | if (err) { | |
1940 | printk(KERN_DEBUG "%s: failed to insert STA entry for" | |
1941 | " the AP (error %d)\n", dev->name, err); | |
73651ee6 JB |
1942 | rcu_read_unlock(); |
1943 | return; | |
1944 | } | |
f0706e82 JB |
1945 | } |
1946 | ||
73651ee6 JB |
1947 | /* |
1948 | * FIXME: Do we really need to update the sta_info's information here? | |
1949 | * We already know about the AP (we found it in our list) so it | |
1950 | * should already be filled with the right info, no? | |
1951 | * As is stands, all this is racy because typically we assume | |
1952 | * the information that is filled in here (except flags) doesn't | |
1953 | * change while a STA structure is alive. As such, it should move | |
1954 | * to between the sta_info_alloc() and sta_info_insert() above. | |
1955 | */ | |
1956 | ||
238814fd JB |
1957 | sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP | |
1958 | WLAN_STA_AUTHORIZED; | |
f0706e82 JB |
1959 | |
1960 | rates = 0; | |
8318d78a JB |
1961 | basic_rates = 0; |
1962 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1963 | ||
f0706e82 JB |
1964 | for (i = 0; i < elems.supp_rates_len; i++) { |
1965 | int rate = (elems.supp_rates[i] & 0x7f) * 5; | |
8318d78a JB |
1966 | |
1967 | if (rate > 110) | |
1968 | have_higher_than_11mbit = true; | |
1969 | ||
1970 | for (j = 0; j < sband->n_bitrates; j++) { | |
1971 | if (sband->bitrates[j].bitrate == rate) | |
f0706e82 | 1972 | rates |= BIT(j); |
8318d78a JB |
1973 | if (elems.supp_rates[i] & 0x80) |
1974 | basic_rates |= BIT(j); | |
1975 | } | |
f0706e82 | 1976 | } |
8318d78a | 1977 | |
f0706e82 JB |
1978 | for (i = 0; i < elems.ext_supp_rates_len; i++) { |
1979 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; | |
8318d78a JB |
1980 | |
1981 | if (rate > 110) | |
1982 | have_higher_than_11mbit = true; | |
1983 | ||
1984 | for (j = 0; j < sband->n_bitrates; j++) { | |
1985 | if (sband->bitrates[j].bitrate == rate) | |
f0706e82 | 1986 | rates |= BIT(j); |
8318d78a JB |
1987 | if (elems.ext_supp_rates[i] & 0x80) |
1988 | basic_rates |= BIT(j); | |
1989 | } | |
f0706e82 | 1990 | } |
8318d78a JB |
1991 | |
1992 | sta->supp_rates[local->hw.conf.channel->band] = rates; | |
1993 | sdata->basic_rates = basic_rates; | |
1994 | ||
1995 | /* cf. IEEE 802.11 9.2.12 */ | |
1996 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
1997 | have_higher_than_11mbit) | |
1998 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
1999 | else | |
2000 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
f0706e82 | 2001 | |
d3c990fb RR |
2002 | if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param && |
2003 | local->ops->conf_ht) { | |
2004 | struct ieee80211_ht_bss_info bss_info; | |
2005 | ||
2006 | ieee80211_ht_cap_ie_to_ht_info( | |
2007 | (struct ieee80211_ht_cap *) | |
2008 | elems.ht_cap_elem, &sta->ht_info); | |
2009 | ieee80211_ht_addt_info_ie_to_ht_bss_info( | |
2010 | (struct ieee80211_ht_addt_info *) | |
2011 | elems.ht_info_elem, &bss_info); | |
2012 | ieee80211_hw_config_ht(local, 1, &sta->ht_info, &bss_info); | |
2013 | } | |
2014 | ||
f0706e82 JB |
2015 | rate_control_rate_init(sta, local); |
2016 | ||
d6f2da5b | 2017 | if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) { |
f0706e82 | 2018 | sta->flags |= WLAN_STA_WME; |
e5f98f2d | 2019 | rcu_read_unlock(); |
f0706e82 JB |
2020 | ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param, |
2021 | elems.wmm_param_len); | |
e5f98f2d JB |
2022 | } else |
2023 | rcu_read_unlock(); | |
f0706e82 | 2024 | |
8318d78a JB |
2025 | /* set AID, ieee80211_set_associated() will tell the driver */ |
2026 | bss_conf->aid = aid; | |
2027 | ieee80211_set_associated(dev, ifsta, 1); | |
f0706e82 | 2028 | |
f0706e82 JB |
2029 | ieee80211_associated(dev, ifsta); |
2030 | } | |
2031 | ||
2032 | ||
2033 | /* Caller must hold local->sta_bss_lock */ | |
2034 | static void __ieee80211_rx_bss_hash_add(struct net_device *dev, | |
2035 | struct ieee80211_sta_bss *bss) | |
2036 | { | |
2037 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
f709fc69 | 2038 | u8 hash_idx; |
902acc78 JB |
2039 | |
2040 | if (bss_mesh_cfg(bss)) | |
2041 | hash_idx = mesh_id_hash(bss_mesh_id(bss), | |
2042 | bss_mesh_id_len(bss)); | |
f709fc69 | 2043 | else |
f709fc69 | 2044 | hash_idx = STA_HASH(bss->bssid); |
902acc78 | 2045 | |
f709fc69 LCC |
2046 | bss->hnext = local->sta_bss_hash[hash_idx]; |
2047 | local->sta_bss_hash[hash_idx] = bss; | |
f0706e82 JB |
2048 | } |
2049 | ||
2050 | ||
2051 | /* Caller must hold local->sta_bss_lock */ | |
2052 | static void __ieee80211_rx_bss_hash_del(struct net_device *dev, | |
2053 | struct ieee80211_sta_bss *bss) | |
2054 | { | |
2055 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2056 | struct ieee80211_sta_bss *b, *prev = NULL; | |
2057 | b = local->sta_bss_hash[STA_HASH(bss->bssid)]; | |
2058 | while (b) { | |
2059 | if (b == bss) { | |
2060 | if (!prev) | |
2061 | local->sta_bss_hash[STA_HASH(bss->bssid)] = | |
2062 | bss->hnext; | |
2063 | else | |
2064 | prev->hnext = bss->hnext; | |
2065 | break; | |
2066 | } | |
2067 | prev = b; | |
2068 | b = b->hnext; | |
2069 | } | |
2070 | } | |
2071 | ||
2072 | ||
2073 | static struct ieee80211_sta_bss * | |
8318d78a | 2074 | ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq, |
cffdd30d | 2075 | u8 *ssid, u8 ssid_len) |
f0706e82 JB |
2076 | { |
2077 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2078 | struct ieee80211_sta_bss *bss; | |
2079 | ||
dd00cc48 | 2080 | bss = kzalloc(sizeof(*bss), GFP_ATOMIC); |
f0706e82 JB |
2081 | if (!bss) |
2082 | return NULL; | |
f0706e82 JB |
2083 | atomic_inc(&bss->users); |
2084 | atomic_inc(&bss->users); | |
2085 | memcpy(bss->bssid, bssid, ETH_ALEN); | |
8318d78a | 2086 | bss->freq = freq; |
cffdd30d JL |
2087 | if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) { |
2088 | memcpy(bss->ssid, ssid, ssid_len); | |
2089 | bss->ssid_len = ssid_len; | |
2090 | } | |
f0706e82 JB |
2091 | |
2092 | spin_lock_bh(&local->sta_bss_lock); | |
2093 | /* TODO: order by RSSI? */ | |
2094 | list_add_tail(&bss->list, &local->sta_bss_list); | |
2095 | __ieee80211_rx_bss_hash_add(dev, bss); | |
2096 | spin_unlock_bh(&local->sta_bss_lock); | |
2097 | return bss; | |
2098 | } | |
2099 | ||
f0706e82 | 2100 | static struct ieee80211_sta_bss * |
8318d78a | 2101 | ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq, |
cffdd30d | 2102 | u8 *ssid, u8 ssid_len) |
f0706e82 JB |
2103 | { |
2104 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2105 | struct ieee80211_sta_bss *bss; | |
2106 | ||
2107 | spin_lock_bh(&local->sta_bss_lock); | |
2108 | bss = local->sta_bss_hash[STA_HASH(bssid)]; | |
2109 | while (bss) { | |
902acc78 JB |
2110 | if (!bss_mesh_cfg(bss) && |
2111 | !memcmp(bss->bssid, bssid, ETH_ALEN) && | |
8318d78a | 2112 | bss->freq == freq && |
cffdd30d JL |
2113 | bss->ssid_len == ssid_len && |
2114 | (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) { | |
f0706e82 JB |
2115 | atomic_inc(&bss->users); |
2116 | break; | |
2117 | } | |
2118 | bss = bss->hnext; | |
2119 | } | |
2120 | spin_unlock_bh(&local->sta_bss_lock); | |
2121 | return bss; | |
2122 | } | |
2123 | ||
f709fc69 LCC |
2124 | #ifdef CONFIG_MAC80211_MESH |
2125 | static struct ieee80211_sta_bss * | |
2126 | ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len, | |
2127 | u8 *mesh_cfg, int freq) | |
2128 | { | |
2129 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2130 | struct ieee80211_sta_bss *bss; | |
2131 | ||
2132 | spin_lock_bh(&local->sta_bss_lock); | |
2133 | bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)]; | |
2134 | while (bss) { | |
902acc78 JB |
2135 | if (bss_mesh_cfg(bss) && |
2136 | !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) && | |
f709fc69 LCC |
2137 | bss->freq == freq && |
2138 | mesh_id_len == bss->mesh_id_len && | |
2139 | (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id, | |
2140 | mesh_id_len))) { | |
2141 | atomic_inc(&bss->users); | |
2142 | break; | |
2143 | } | |
2144 | bss = bss->hnext; | |
2145 | } | |
2146 | spin_unlock_bh(&local->sta_bss_lock); | |
2147 | return bss; | |
2148 | } | |
2149 | ||
2150 | static struct ieee80211_sta_bss * | |
2151 | ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len, | |
05e5e883 | 2152 | u8 *mesh_cfg, int mesh_config_len, int freq) |
f709fc69 LCC |
2153 | { |
2154 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2155 | struct ieee80211_sta_bss *bss; | |
2156 | ||
05e5e883 LCC |
2157 | if (mesh_config_len != MESH_CFG_LEN) |
2158 | return NULL; | |
2159 | ||
f709fc69 LCC |
2160 | bss = kzalloc(sizeof(*bss), GFP_ATOMIC); |
2161 | if (!bss) | |
2162 | return NULL; | |
2163 | ||
24736701 | 2164 | bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC); |
f709fc69 LCC |
2165 | if (!bss->mesh_cfg) { |
2166 | kfree(bss); | |
2167 | return NULL; | |
2168 | } | |
2169 | ||
2170 | if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) { | |
2171 | bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC); | |
2172 | if (!bss->mesh_id) { | |
2173 | kfree(bss->mesh_cfg); | |
2174 | kfree(bss); | |
2175 | return NULL; | |
2176 | } | |
2177 | memcpy(bss->mesh_id, mesh_id, mesh_id_len); | |
2178 | } | |
2179 | ||
2180 | atomic_inc(&bss->users); | |
2181 | atomic_inc(&bss->users); | |
24736701 | 2182 | memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN); |
f709fc69 LCC |
2183 | bss->mesh_id_len = mesh_id_len; |
2184 | bss->freq = freq; | |
2185 | spin_lock_bh(&local->sta_bss_lock); | |
2186 | /* TODO: order by RSSI? */ | |
2187 | list_add_tail(&bss->list, &local->sta_bss_list); | |
2188 | __ieee80211_rx_bss_hash_add(dev, bss); | |
2189 | spin_unlock_bh(&local->sta_bss_lock); | |
2190 | return bss; | |
2191 | } | |
2192 | #endif | |
f0706e82 JB |
2193 | |
2194 | static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss) | |
2195 | { | |
2196 | kfree(bss->wpa_ie); | |
2197 | kfree(bss->rsn_ie); | |
2198 | kfree(bss->wmm_ie); | |
c7153508 | 2199 | kfree(bss->ht_ie); |
902acc78 JB |
2200 | kfree(bss_mesh_id(bss)); |
2201 | kfree(bss_mesh_cfg(bss)); | |
f0706e82 JB |
2202 | kfree(bss); |
2203 | } | |
2204 | ||
2205 | ||
2206 | static void ieee80211_rx_bss_put(struct net_device *dev, | |
2207 | struct ieee80211_sta_bss *bss) | |
2208 | { | |
2209 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2210 | if (!atomic_dec_and_test(&bss->users)) | |
2211 | return; | |
2212 | ||
2213 | spin_lock_bh(&local->sta_bss_lock); | |
2214 | __ieee80211_rx_bss_hash_del(dev, bss); | |
2215 | list_del(&bss->list); | |
2216 | spin_unlock_bh(&local->sta_bss_lock); | |
2217 | ieee80211_rx_bss_free(bss); | |
2218 | } | |
2219 | ||
2220 | ||
2221 | void ieee80211_rx_bss_list_init(struct net_device *dev) | |
2222 | { | |
2223 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2224 | spin_lock_init(&local->sta_bss_lock); | |
2225 | INIT_LIST_HEAD(&local->sta_bss_list); | |
2226 | } | |
2227 | ||
2228 | ||
2229 | void ieee80211_rx_bss_list_deinit(struct net_device *dev) | |
2230 | { | |
2231 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2232 | struct ieee80211_sta_bss *bss, *tmp; | |
2233 | ||
2234 | list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list) | |
2235 | ieee80211_rx_bss_put(dev, bss); | |
2236 | } | |
2237 | ||
2238 | ||
a607268a BR |
2239 | static int ieee80211_sta_join_ibss(struct net_device *dev, |
2240 | struct ieee80211_if_sta *ifsta, | |
2241 | struct ieee80211_sta_bss *bss) | |
2242 | { | |
2243 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2244 | int res, rates, i, j; | |
2245 | struct sk_buff *skb; | |
2246 | struct ieee80211_mgmt *mgmt; | |
2247 | struct ieee80211_tx_control control; | |
2248 | struct rate_selection ratesel; | |
2249 | u8 *pos; | |
2250 | struct ieee80211_sub_if_data *sdata; | |
2251 | struct ieee80211_supported_band *sband; | |
2252 | ||
2253 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
2254 | ||
9dd6aed0 JB |
2255 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
2256 | ||
a607268a | 2257 | /* Remove possible STA entries from other IBSS networks. */ |
dc6676b7 | 2258 | sta_info_flush_delayed(sdata); |
a607268a BR |
2259 | |
2260 | if (local->ops->reset_tsf) { | |
2261 | /* Reset own TSF to allow time synchronization work. */ | |
2262 | local->ops->reset_tsf(local_to_hw(local)); | |
2263 | } | |
2264 | memcpy(ifsta->bssid, bss->bssid, ETH_ALEN); | |
2265 | res = ieee80211_if_config(dev); | |
2266 | if (res) | |
2267 | return res; | |
2268 | ||
2269 | local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10; | |
2270 | ||
a607268a BR |
2271 | sdata->drop_unencrypted = bss->capability & |
2272 | WLAN_CAPABILITY_PRIVACY ? 1 : 0; | |
2273 | ||
2274 | res = ieee80211_set_freq(local, bss->freq); | |
2275 | ||
2276 | if (local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS) { | |
2277 | printk(KERN_DEBUG "%s: IBSS not allowed on frequency " | |
2278 | "%d MHz\n", dev->name, local->oper_channel->center_freq); | |
2279 | return -1; | |
2280 | } | |
2281 | ||
2282 | /* Set beacon template */ | |
2283 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400); | |
2284 | do { | |
2285 | if (!skb) | |
2286 | break; | |
2287 | ||
2288 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2289 | ||
2290 | mgmt = (struct ieee80211_mgmt *) | |
2291 | skb_put(skb, 24 + sizeof(mgmt->u.beacon)); | |
2292 | memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon)); | |
2293 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
2294 | IEEE80211_STYPE_BEACON); | |
2295 | memset(mgmt->da, 0xff, ETH_ALEN); | |
2296 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
2297 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
2298 | mgmt->u.beacon.beacon_int = | |
2299 | cpu_to_le16(local->hw.conf.beacon_int); | |
2300 | mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability); | |
2301 | ||
2302 | pos = skb_put(skb, 2 + ifsta->ssid_len); | |
2303 | *pos++ = WLAN_EID_SSID; | |
2304 | *pos++ = ifsta->ssid_len; | |
2305 | memcpy(pos, ifsta->ssid, ifsta->ssid_len); | |
2306 | ||
2307 | rates = bss->supp_rates_len; | |
2308 | if (rates > 8) | |
2309 | rates = 8; | |
2310 | pos = skb_put(skb, 2 + rates); | |
2311 | *pos++ = WLAN_EID_SUPP_RATES; | |
2312 | *pos++ = rates; | |
2313 | memcpy(pos, bss->supp_rates, rates); | |
2314 | ||
2315 | if (bss->band == IEEE80211_BAND_2GHZ) { | |
2316 | pos = skb_put(skb, 2 + 1); | |
2317 | *pos++ = WLAN_EID_DS_PARAMS; | |
2318 | *pos++ = 1; | |
2319 | *pos++ = ieee80211_frequency_to_channel(bss->freq); | |
2320 | } | |
2321 | ||
2322 | pos = skb_put(skb, 2 + 2); | |
2323 | *pos++ = WLAN_EID_IBSS_PARAMS; | |
2324 | *pos++ = 2; | |
2325 | /* FIX: set ATIM window based on scan results */ | |
2326 | *pos++ = 0; | |
2327 | *pos++ = 0; | |
2328 | ||
2329 | if (bss->supp_rates_len > 8) { | |
2330 | rates = bss->supp_rates_len - 8; | |
2331 | pos = skb_put(skb, 2 + rates); | |
2332 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
2333 | *pos++ = rates; | |
2334 | memcpy(pos, &bss->supp_rates[8], rates); | |
2335 | } | |
2336 | ||
2337 | memset(&control, 0, sizeof(control)); | |
2338 | rate_control_get_rate(dev, sband, skb, &ratesel); | |
2339 | if (!ratesel.rate) { | |
2340 | printk(KERN_DEBUG "%s: Failed to determine TX rate " | |
2341 | "for IBSS beacon\n", dev->name); | |
2342 | break; | |
2343 | } | |
2344 | control.vif = &sdata->vif; | |
2345 | control.tx_rate = ratesel.rate; | |
2346 | if (sdata->bss_conf.use_short_preamble && | |
2347 | ratesel.rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) | |
2348 | control.flags |= IEEE80211_TXCTL_SHORT_PREAMBLE; | |
2349 | control.antenna_sel_tx = local->hw.conf.antenna_sel_tx; | |
2350 | control.flags |= IEEE80211_TXCTL_NO_ACK; | |
2351 | control.retry_limit = 1; | |
2352 | ||
2353 | ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC); | |
2354 | if (ifsta->probe_resp) { | |
2355 | mgmt = (struct ieee80211_mgmt *) | |
2356 | ifsta->probe_resp->data; | |
2357 | mgmt->frame_control = | |
2358 | IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
2359 | IEEE80211_STYPE_PROBE_RESP); | |
2360 | } else { | |
2361 | printk(KERN_DEBUG "%s: Could not allocate ProbeResp " | |
2362 | "template for IBSS\n", dev->name); | |
2363 | } | |
2364 | ||
2365 | if (local->ops->beacon_update && | |
2366 | local->ops->beacon_update(local_to_hw(local), | |
2367 | skb, &control) == 0) { | |
2368 | printk(KERN_DEBUG "%s: Configured IBSS beacon " | |
2369 | "template\n", dev->name); | |
2370 | skb = NULL; | |
2371 | } | |
2372 | ||
2373 | rates = 0; | |
2374 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
2375 | for (i = 0; i < bss->supp_rates_len; i++) { | |
2376 | int bitrate = (bss->supp_rates[i] & 0x7f) * 5; | |
2377 | for (j = 0; j < sband->n_bitrates; j++) | |
2378 | if (sband->bitrates[j].bitrate == bitrate) | |
2379 | rates |= BIT(j); | |
2380 | } | |
2381 | ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates; | |
e2839d8f VK |
2382 | |
2383 | ieee80211_sta_def_wmm_params(dev, bss, 1); | |
a607268a BR |
2384 | } while (0); |
2385 | ||
2386 | if (skb) { | |
2387 | printk(KERN_DEBUG "%s: Failed to configure IBSS beacon " | |
2388 | "template\n", dev->name); | |
2389 | dev_kfree_skb(skb); | |
2390 | } | |
2391 | ||
2392 | ifsta->state = IEEE80211_IBSS_JOINED; | |
2393 | mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); | |
2394 | ||
2395 | ieee80211_rx_bss_put(dev, bss); | |
2396 | ||
2397 | return res; | |
2398 | } | |
2399 | ||
f709fc69 LCC |
2400 | u64 ieee80211_sta_get_rates(struct ieee80211_local *local, |
2401 | struct ieee802_11_elems *elems, | |
2402 | enum ieee80211_band band) | |
2403 | { | |
2404 | struct ieee80211_supported_band *sband; | |
2405 | struct ieee80211_rate *bitrates; | |
2406 | size_t num_rates; | |
2407 | u64 supp_rates; | |
2408 | int i, j; | |
2409 | sband = local->hw.wiphy->bands[band]; | |
2410 | ||
2411 | if (!sband) { | |
2412 | WARN_ON(1); | |
2413 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
2414 | } | |
2415 | ||
2416 | bitrates = sband->bitrates; | |
2417 | num_rates = sband->n_bitrates; | |
2418 | supp_rates = 0; | |
2419 | for (i = 0; i < elems->supp_rates_len + | |
2420 | elems->ext_supp_rates_len; i++) { | |
2421 | u8 rate = 0; | |
2422 | int own_rate; | |
2423 | if (i < elems->supp_rates_len) | |
2424 | rate = elems->supp_rates[i]; | |
2425 | else if (elems->ext_supp_rates) | |
2426 | rate = elems->ext_supp_rates | |
2427 | [i - elems->supp_rates_len]; | |
2428 | own_rate = 5 * (rate & 0x7f); | |
2429 | for (j = 0; j < num_rates; j++) | |
2430 | if (bitrates[j].bitrate == own_rate) | |
2431 | supp_rates |= BIT(j); | |
2432 | } | |
2433 | return supp_rates; | |
2434 | } | |
2435 | ||
a607268a | 2436 | |
f0706e82 JB |
2437 | static void ieee80211_rx_bss_info(struct net_device *dev, |
2438 | struct ieee80211_mgmt *mgmt, | |
2439 | size_t len, | |
2440 | struct ieee80211_rx_status *rx_status, | |
2441 | int beacon) | |
2442 | { | |
2443 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2444 | struct ieee802_11_elems elems; | |
2445 | size_t baselen; | |
8318d78a | 2446 | int freq, clen; |
f0706e82 JB |
2447 | struct ieee80211_sta_bss *bss; |
2448 | struct sta_info *sta; | |
2449 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
9d9bf77d | 2450 | u64 beacon_timestamp, rx_timestamp; |
fab7d4a2 | 2451 | struct ieee80211_channel *channel; |
0795af57 JP |
2452 | DECLARE_MAC_BUF(mac); |
2453 | DECLARE_MAC_BUF(mac2); | |
f0706e82 JB |
2454 | |
2455 | if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN)) | |
2456 | return; /* ignore ProbeResp to foreign address */ | |
2457 | ||
2458 | #if 0 | |
0795af57 | 2459 | printk(KERN_DEBUG "%s: RX %s from %s to %s\n", |
f0706e82 | 2460 | dev->name, beacon ? "Beacon" : "Probe Response", |
0795af57 | 2461 | print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da)); |
f0706e82 JB |
2462 | #endif |
2463 | ||
2464 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
2465 | if (baselen > len) | |
2466 | return; | |
2467 | ||
9d9bf77d | 2468 | beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp); |
67a4cce4 | 2469 | ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems); |
f0706e82 | 2470 | |
902acc78 JB |
2471 | if (ieee80211_vif_is_mesh(&sdata->vif) && elems.mesh_id && |
2472 | elems.mesh_config && mesh_matches_local(&elems, dev)) { | |
2473 | u64 rates = ieee80211_sta_get_rates(local, &elems, | |
2474 | rx_status->band); | |
2475 | ||
2476 | mesh_neighbour_update(mgmt->sa, rates, dev, | |
2477 | mesh_peer_accepts_plinks(&elems, dev)); | |
2478 | } | |
f709fc69 | 2479 | |
d0709a65 JB |
2480 | rcu_read_lock(); |
2481 | ||
51fb61e7 | 2482 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates && |
f0706e82 JB |
2483 | memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 && |
2484 | (sta = sta_info_get(local, mgmt->sa))) { | |
f709fc69 LCC |
2485 | u64 prev_rates; |
2486 | u64 supp_rates = ieee80211_sta_get_rates(local, &elems, | |
2487 | rx_status->band); | |
f0706e82 | 2488 | |
8318d78a JB |
2489 | prev_rates = sta->supp_rates[rx_status->band]; |
2490 | sta->supp_rates[rx_status->band] &= supp_rates; | |
2491 | if (sta->supp_rates[rx_status->band] == 0) { | |
f0706e82 JB |
2492 | /* No matching rates - this should not really happen. |
2493 | * Make sure that at least one rate is marked | |
2494 | * supported to avoid issues with TX rate ctrl. */ | |
8318d78a JB |
2495 | sta->supp_rates[rx_status->band] = |
2496 | sdata->u.sta.supp_rates_bits[rx_status->band]; | |
f0706e82 | 2497 | } |
8318d78a | 2498 | if (sta->supp_rates[rx_status->band] != prev_rates) { |
f0706e82 | 2499 | printk(KERN_DEBUG "%s: updated supp_rates set for " |
8318d78a JB |
2500 | "%s based on beacon info (0x%llx & 0x%llx -> " |
2501 | "0x%llx)\n", | |
2502 | dev->name, print_mac(mac, sta->addr), | |
2503 | (unsigned long long) prev_rates, | |
2504 | (unsigned long long) supp_rates, | |
2505 | (unsigned long long) sta->supp_rates[rx_status->band]); | |
f0706e82 | 2506 | } |
f0706e82 JB |
2507 | } |
2508 | ||
d0709a65 JB |
2509 | rcu_read_unlock(); |
2510 | ||
f0706e82 | 2511 | if (elems.ds_params && elems.ds_params_len == 1) |
8318d78a | 2512 | freq = ieee80211_channel_to_frequency(elems.ds_params[0]); |
f0706e82 | 2513 | else |
8318d78a | 2514 | freq = rx_status->freq; |
f0706e82 | 2515 | |
fab7d4a2 JB |
2516 | channel = ieee80211_get_channel(local->hw.wiphy, freq); |
2517 | ||
2518 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
2519 | return; | |
2520 | ||
f709fc69 LCC |
2521 | #ifdef CONFIG_MAC80211_MESH |
2522 | if (elems.mesh_config) | |
2523 | bss = ieee80211_rx_mesh_bss_get(dev, elems.mesh_id, | |
2524 | elems.mesh_id_len, elems.mesh_config, freq); | |
2525 | else | |
2526 | #endif | |
2527 | bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq, | |
cffdd30d | 2528 | elems.ssid, elems.ssid_len); |
f709fc69 LCC |
2529 | if (!bss) { |
2530 | #ifdef CONFIG_MAC80211_MESH | |
2531 | if (elems.mesh_config) | |
2532 | bss = ieee80211_rx_mesh_bss_add(dev, elems.mesh_id, | |
05e5e883 LCC |
2533 | elems.mesh_id_len, elems.mesh_config, |
2534 | elems.mesh_config_len, freq); | |
f709fc69 LCC |
2535 | else |
2536 | #endif | |
2537 | bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq, | |
2538 | elems.ssid, elems.ssid_len); | |
f0706e82 JB |
2539 | if (!bss) |
2540 | return; | |
2541 | } else { | |
2542 | #if 0 | |
2543 | /* TODO: order by RSSI? */ | |
2544 | spin_lock_bh(&local->sta_bss_lock); | |
2545 | list_move_tail(&bss->list, &local->sta_bss_list); | |
2546 | spin_unlock_bh(&local->sta_bss_lock); | |
2547 | #endif | |
2548 | } | |
2549 | ||
8318d78a JB |
2550 | bss->band = rx_status->band; |
2551 | ||
9d9bf77d BR |
2552 | if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS && |
2553 | bss->probe_resp && beacon) { | |
2554 | /* STA mode: | |
2555 | * Do not allow beacon to override data from Probe Response. */ | |
f0706e82 JB |
2556 | ieee80211_rx_bss_put(dev, bss); |
2557 | return; | |
2558 | } | |
2559 | ||
5628221c DD |
2560 | /* save the ERP value so that it is available at association time */ |
2561 | if (elems.erp_info && elems.erp_info_len >= 1) { | |
2562 | bss->erp_value = elems.erp_info[0]; | |
2563 | bss->has_erp_value = 1; | |
2564 | } | |
2565 | ||
f0706e82 JB |
2566 | bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int); |
2567 | bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info); | |
f0706e82 JB |
2568 | |
2569 | bss->supp_rates_len = 0; | |
2570 | if (elems.supp_rates) { | |
2571 | clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len; | |
2572 | if (clen > elems.supp_rates_len) | |
2573 | clen = elems.supp_rates_len; | |
2574 | memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates, | |
2575 | clen); | |
2576 | bss->supp_rates_len += clen; | |
2577 | } | |
2578 | if (elems.ext_supp_rates) { | |
2579 | clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len; | |
2580 | if (clen > elems.ext_supp_rates_len) | |
2581 | clen = elems.ext_supp_rates_len; | |
2582 | memcpy(&bss->supp_rates[bss->supp_rates_len], | |
2583 | elems.ext_supp_rates, clen); | |
2584 | bss->supp_rates_len += clen; | |
2585 | } | |
2586 | ||
2587 | if (elems.wpa && | |
2588 | (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len || | |
2589 | memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) { | |
2590 | kfree(bss->wpa_ie); | |
2591 | bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC); | |
2592 | if (bss->wpa_ie) { | |
2593 | memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2); | |
2594 | bss->wpa_ie_len = elems.wpa_len + 2; | |
2595 | } else | |
2596 | bss->wpa_ie_len = 0; | |
2597 | } else if (!elems.wpa && bss->wpa_ie) { | |
2598 | kfree(bss->wpa_ie); | |
2599 | bss->wpa_ie = NULL; | |
2600 | bss->wpa_ie_len = 0; | |
2601 | } | |
2602 | ||
2603 | if (elems.rsn && | |
2604 | (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len || | |
2605 | memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) { | |
2606 | kfree(bss->rsn_ie); | |
2607 | bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC); | |
2608 | if (bss->rsn_ie) { | |
2609 | memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2); | |
2610 | bss->rsn_ie_len = elems.rsn_len + 2; | |
2611 | } else | |
2612 | bss->rsn_ie_len = 0; | |
2613 | } else if (!elems.rsn && bss->rsn_ie) { | |
2614 | kfree(bss->rsn_ie); | |
2615 | bss->rsn_ie = NULL; | |
2616 | bss->rsn_ie_len = 0; | |
2617 | } | |
2618 | ||
2619 | if (elems.wmm_param && | |
2620 | (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len || | |
2621 | memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) { | |
2622 | kfree(bss->wmm_ie); | |
2623 | bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC); | |
2624 | if (bss->wmm_ie) { | |
2625 | memcpy(bss->wmm_ie, elems.wmm_param - 2, | |
2626 | elems.wmm_param_len + 2); | |
2627 | bss->wmm_ie_len = elems.wmm_param_len + 2; | |
2628 | } else | |
2629 | bss->wmm_ie_len = 0; | |
2630 | } else if (!elems.wmm_param && bss->wmm_ie) { | |
2631 | kfree(bss->wmm_ie); | |
2632 | bss->wmm_ie = NULL; | |
2633 | bss->wmm_ie_len = 0; | |
2634 | } | |
c7153508 RR |
2635 | if (elems.ht_cap_elem && |
2636 | (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len || | |
2637 | memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) { | |
2638 | kfree(bss->ht_ie); | |
2639 | bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC); | |
2640 | if (bss->ht_ie) { | |
2641 | memcpy(bss->ht_ie, elems.ht_cap_elem - 2, | |
2642 | elems.ht_cap_elem_len + 2); | |
2643 | bss->ht_ie_len = elems.ht_cap_elem_len + 2; | |
2644 | } else | |
2645 | bss->ht_ie_len = 0; | |
2646 | } else if (!elems.ht_cap_elem && bss->ht_ie) { | |
2647 | kfree(bss->ht_ie); | |
2648 | bss->ht_ie = NULL; | |
2649 | bss->ht_ie_len = 0; | |
2650 | } | |
f0706e82 | 2651 | |
9d9bf77d | 2652 | bss->timestamp = beacon_timestamp; |
f0706e82 JB |
2653 | bss->last_update = jiffies; |
2654 | bss->rssi = rx_status->ssi; | |
2655 | bss->signal = rx_status->signal; | |
2656 | bss->noise = rx_status->noise; | |
2657 | if (!beacon) | |
2658 | bss->probe_resp++; | |
9d9bf77d BR |
2659 | |
2660 | /* check if we need to merge IBSS */ | |
2661 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon && | |
2662 | !local->sta_sw_scanning && !local->sta_hw_scanning && | |
fba4a1e6 | 2663 | bss->capability & WLAN_CAPABILITY_IBSS && |
9d9bf77d BR |
2664 | bss->freq == local->oper_channel->center_freq && |
2665 | elems.ssid_len == sdata->u.sta.ssid_len && | |
2666 | memcmp(elems.ssid, sdata->u.sta.ssid, sdata->u.sta.ssid_len) == 0) { | |
2667 | if (rx_status->flag & RX_FLAG_TSFT) { | |
2668 | /* in order for correct IBSS merging we need mactime | |
2669 | * | |
2670 | * since mactime is defined as the time the first data | |
2671 | * symbol of the frame hits the PHY, and the timestamp | |
2672 | * of the beacon is defined as "the time that the data | |
2673 | * symbol containing the first bit of the timestamp is | |
2674 | * transmitted to the PHY plus the transmitting STA’s | |
2675 | * delays through its local PHY from the MAC-PHY | |
2676 | * interface to its interface with the WM" | |
2677 | * (802.11 11.1.2) - equals the time this bit arrives at | |
2678 | * the receiver - we have to take into account the | |
2679 | * offset between the two. | |
2680 | * e.g: at 1 MBit that means mactime is 192 usec earlier | |
2681 | * (=24 bytes * 8 usecs/byte) than the beacon timestamp. | |
2682 | */ | |
2683 | int rate = local->hw.wiphy->bands[rx_status->band]-> | |
2684 | bitrates[rx_status->rate_idx].bitrate; | |
2685 | rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate); | |
2686 | } else if (local && local->ops && local->ops->get_tsf) | |
2687 | /* second best option: get current TSF */ | |
2688 | rx_timestamp = local->ops->get_tsf(local_to_hw(local)); | |
2689 | else | |
2690 | /* can't merge without knowing the TSF */ | |
2691 | rx_timestamp = -1LLU; | |
2692 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
2693 | printk(KERN_DEBUG "RX beacon SA=%s BSSID=" | |
2694 | "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n", | |
2695 | print_mac(mac, mgmt->sa), | |
2696 | print_mac(mac2, mgmt->bssid), | |
2697 | (unsigned long long)rx_timestamp, | |
2698 | (unsigned long long)beacon_timestamp, | |
2699 | (unsigned long long)(rx_timestamp - beacon_timestamp), | |
2700 | jiffies); | |
2701 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
2702 | if (beacon_timestamp > rx_timestamp) { | |
fba4a1e6 | 2703 | #ifndef CONFIG_MAC80211_IBSS_DEBUG |
d97cf015 | 2704 | if (net_ratelimit()) |
fba4a1e6 | 2705 | #endif |
9d9bf77d BR |
2706 | printk(KERN_DEBUG "%s: beacon TSF higher than " |
2707 | "local TSF - IBSS merge with BSSID %s\n", | |
2708 | dev->name, print_mac(mac, mgmt->bssid)); | |
2709 | ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss); | |
2710 | ieee80211_ibss_add_sta(dev, NULL, | |
2711 | mgmt->bssid, mgmt->sa); | |
2712 | } | |
2713 | } | |
2714 | ||
f0706e82 JB |
2715 | ieee80211_rx_bss_put(dev, bss); |
2716 | } | |
2717 | ||
2718 | ||
2719 | static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev, | |
2720 | struct ieee80211_mgmt *mgmt, | |
2721 | size_t len, | |
2722 | struct ieee80211_rx_status *rx_status) | |
2723 | { | |
2724 | ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0); | |
2725 | } | |
2726 | ||
2727 | ||
2728 | static void ieee80211_rx_mgmt_beacon(struct net_device *dev, | |
2729 | struct ieee80211_mgmt *mgmt, | |
2730 | size_t len, | |
2731 | struct ieee80211_rx_status *rx_status) | |
2732 | { | |
f0706e82 JB |
2733 | struct ieee80211_sub_if_data *sdata; |
2734 | struct ieee80211_if_sta *ifsta; | |
f0706e82 JB |
2735 | size_t baselen; |
2736 | struct ieee802_11_elems elems; | |
d3c990fb RR |
2737 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
2738 | struct ieee80211_conf *conf = &local->hw.conf; | |
471b3efd | 2739 | u32 changed = 0; |
f0706e82 JB |
2740 | |
2741 | ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1); | |
2742 | ||
2743 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
51fb61e7 | 2744 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
f0706e82 JB |
2745 | return; |
2746 | ifsta = &sdata->u.sta; | |
2747 | ||
d6f2da5b | 2748 | if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) || |
f0706e82 JB |
2749 | memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) |
2750 | return; | |
2751 | ||
2752 | /* Process beacon from the current BSS */ | |
2753 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
2754 | if (baselen > len) | |
2755 | return; | |
2756 | ||
67a4cce4 | 2757 | ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems); |
f0706e82 | 2758 | |
5628221c | 2759 | if (elems.erp_info && elems.erp_info_len >= 1) |
471b3efd | 2760 | changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]); |
f0706e82 | 2761 | |
d3c990fb RR |
2762 | if (elems.ht_cap_elem && elems.ht_info_elem && |
2763 | elems.wmm_param && local->ops->conf_ht && | |
2764 | conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) { | |
2765 | struct ieee80211_ht_bss_info bss_info; | |
2766 | ||
2767 | ieee80211_ht_addt_info_ie_to_ht_bss_info( | |
2768 | (struct ieee80211_ht_addt_info *) | |
2769 | elems.ht_info_elem, &bss_info); | |
2770 | /* check if AP changed bss inforamation */ | |
2771 | if ((conf->ht_bss_conf.primary_channel != | |
2772 | bss_info.primary_channel) || | |
2773 | (conf->ht_bss_conf.bss_cap != bss_info.bss_cap) || | |
2774 | (conf->ht_bss_conf.bss_op_mode != bss_info.bss_op_mode)) | |
2775 | ieee80211_hw_config_ht(local, 1, &conf->ht_conf, | |
2776 | &bss_info); | |
2777 | } | |
2778 | ||
d6f2da5b | 2779 | if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) { |
f0706e82 JB |
2780 | ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param, |
2781 | elems.wmm_param_len); | |
2782 | } | |
471b3efd JB |
2783 | |
2784 | ieee80211_bss_info_change_notify(sdata, changed); | |
f0706e82 JB |
2785 | } |
2786 | ||
2787 | ||
2788 | static void ieee80211_rx_mgmt_probe_req(struct net_device *dev, | |
2789 | struct ieee80211_if_sta *ifsta, | |
2790 | struct ieee80211_mgmt *mgmt, | |
2791 | size_t len, | |
2792 | struct ieee80211_rx_status *rx_status) | |
2793 | { | |
2794 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2795 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2796 | int tx_last_beacon; | |
2797 | struct sk_buff *skb; | |
2798 | struct ieee80211_mgmt *resp; | |
2799 | u8 *pos, *end; | |
0795af57 JP |
2800 | DECLARE_MAC_BUF(mac); |
2801 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
2802 | DECLARE_MAC_BUF(mac2); | |
2803 | DECLARE_MAC_BUF(mac3); | |
2804 | #endif | |
f0706e82 | 2805 | |
51fb61e7 | 2806 | if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS || |
f0706e82 JB |
2807 | ifsta->state != IEEE80211_IBSS_JOINED || |
2808 | len < 24 + 2 || !ifsta->probe_resp) | |
2809 | return; | |
2810 | ||
2811 | if (local->ops->tx_last_beacon) | |
2812 | tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local)); | |
2813 | else | |
2814 | tx_last_beacon = 1; | |
2815 | ||
2816 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0795af57 JP |
2817 | printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID=" |
2818 | "%s (tx_last_beacon=%d)\n", | |
2819 | dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da), | |
2820 | print_mac(mac3, mgmt->bssid), tx_last_beacon); | |
f0706e82 JB |
2821 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
2822 | ||
2823 | if (!tx_last_beacon) | |
2824 | return; | |
2825 | ||
2826 | if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 && | |
2827 | memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0) | |
2828 | return; | |
2829 | ||
2830 | end = ((u8 *) mgmt) + len; | |
2831 | pos = mgmt->u.probe_req.variable; | |
2832 | if (pos[0] != WLAN_EID_SSID || | |
2833 | pos + 2 + pos[1] > end) { | |
2834 | if (net_ratelimit()) { | |
2835 | printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq " | |
0795af57 JP |
2836 | "from %s\n", |
2837 | dev->name, print_mac(mac, mgmt->sa)); | |
f0706e82 JB |
2838 | } |
2839 | return; | |
2840 | } | |
2841 | if (pos[1] != 0 && | |
2842 | (pos[1] != ifsta->ssid_len || | |
2843 | memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) { | |
2844 | /* Ignore ProbeReq for foreign SSID */ | |
2845 | return; | |
2846 | } | |
2847 | ||
2848 | /* Reply with ProbeResp */ | |
0ec0b7ac | 2849 | skb = skb_copy(ifsta->probe_resp, GFP_KERNEL); |
f0706e82 JB |
2850 | if (!skb) |
2851 | return; | |
2852 | ||
2853 | resp = (struct ieee80211_mgmt *) skb->data; | |
2854 | memcpy(resp->da, mgmt->sa, ETH_ALEN); | |
2855 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0795af57 JP |
2856 | printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n", |
2857 | dev->name, print_mac(mac, resp->da)); | |
f0706e82 JB |
2858 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
2859 | ieee80211_sta_tx(dev, skb, 0); | |
2860 | } | |
2861 | ||
4e20cb29 JB |
2862 | static void ieee80211_rx_mgmt_action(struct net_device *dev, |
2863 | struct ieee80211_if_sta *ifsta, | |
2864 | struct ieee80211_mgmt *mgmt, | |
f709fc69 LCC |
2865 | size_t len, |
2866 | struct ieee80211_rx_status *rx_status) | |
9f985b0e | 2867 | { |
f709fc69 | 2868 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
f709fc69 | 2869 | |
9f985b0e RR |
2870 | if (len < IEEE80211_MIN_ACTION_SIZE) |
2871 | return; | |
2872 | ||
2873 | switch (mgmt->u.action.category) { | |
2874 | case WLAN_CATEGORY_BACK: | |
2875 | switch (mgmt->u.action.u.addba_req.action_code) { | |
2876 | case WLAN_ACTION_ADDBA_REQ: | |
2877 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2878 | sizeof(mgmt->u.action.u.addba_req))) | |
2879 | break; | |
2880 | ieee80211_sta_process_addba_request(dev, mgmt, len); | |
2881 | break; | |
eadc8d9e RR |
2882 | case WLAN_ACTION_ADDBA_RESP: |
2883 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2884 | sizeof(mgmt->u.action.u.addba_resp))) | |
2885 | break; | |
2886 | ieee80211_sta_process_addba_resp(dev, mgmt, len); | |
2887 | break; | |
688b88a4 RR |
2888 | case WLAN_ACTION_DELBA: |
2889 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2890 | sizeof(mgmt->u.action.u.delba))) | |
2891 | break; | |
2892 | ieee80211_sta_process_delba(dev, mgmt, len); | |
2893 | break; | |
9f985b0e RR |
2894 | default: |
2895 | if (net_ratelimit()) | |
688b88a4 | 2896 | printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n", |
9f985b0e RR |
2897 | dev->name); |
2898 | break; | |
2899 | } | |
2900 | break; | |
f709fc69 | 2901 | case PLINK_CATEGORY: |
902acc78 | 2902 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
f709fc69 LCC |
2903 | mesh_rx_plink_frame(dev, mgmt, len, rx_status); |
2904 | break; | |
f709fc69 | 2905 | case MESH_PATH_SEL_CATEGORY: |
902acc78 | 2906 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
f709fc69 LCC |
2907 | mesh_rx_path_sel_frame(dev, mgmt, len); |
2908 | break; | |
9f985b0e | 2909 | default: |
f709fc69 LCC |
2910 | if (net_ratelimit()) |
2911 | printk(KERN_DEBUG "%s: Rx unknown action frame - " | |
2912 | "category=%d\n", dev->name, mgmt->u.action.category); | |
9f985b0e RR |
2913 | break; |
2914 | } | |
2915 | } | |
f0706e82 JB |
2916 | |
2917 | void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb, | |
2918 | struct ieee80211_rx_status *rx_status) | |
2919 | { | |
2920 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2921 | struct ieee80211_sub_if_data *sdata; | |
2922 | struct ieee80211_if_sta *ifsta; | |
2923 | struct ieee80211_mgmt *mgmt; | |
2924 | u16 fc; | |
2925 | ||
2926 | if (skb->len < 24) | |
2927 | goto fail; | |
2928 | ||
2929 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2930 | ifsta = &sdata->u.sta; | |
2931 | ||
2932 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
2933 | fc = le16_to_cpu(mgmt->frame_control); | |
2934 | ||
2935 | switch (fc & IEEE80211_FCTL_STYPE) { | |
2936 | case IEEE80211_STYPE_PROBE_REQ: | |
2937 | case IEEE80211_STYPE_PROBE_RESP: | |
2938 | case IEEE80211_STYPE_BEACON: | |
f709fc69 | 2939 | case IEEE80211_STYPE_ACTION: |
f0706e82 JB |
2940 | memcpy(skb->cb, rx_status, sizeof(*rx_status)); |
2941 | case IEEE80211_STYPE_AUTH: | |
2942 | case IEEE80211_STYPE_ASSOC_RESP: | |
2943 | case IEEE80211_STYPE_REASSOC_RESP: | |
2944 | case IEEE80211_STYPE_DEAUTH: | |
2945 | case IEEE80211_STYPE_DISASSOC: | |
2946 | skb_queue_tail(&ifsta->skb_queue, skb); | |
2947 | queue_work(local->hw.workqueue, &ifsta->work); | |
2948 | return; | |
2949 | default: | |
2950 | printk(KERN_DEBUG "%s: received unknown management frame - " | |
2951 | "stype=%d\n", dev->name, | |
2952 | (fc & IEEE80211_FCTL_STYPE) >> 4); | |
2953 | break; | |
2954 | } | |
2955 | ||
2956 | fail: | |
2957 | kfree_skb(skb); | |
2958 | } | |
2959 | ||
2960 | ||
2961 | static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev, | |
2962 | struct sk_buff *skb) | |
2963 | { | |
2964 | struct ieee80211_rx_status *rx_status; | |
2965 | struct ieee80211_sub_if_data *sdata; | |
2966 | struct ieee80211_if_sta *ifsta; | |
2967 | struct ieee80211_mgmt *mgmt; | |
2968 | u16 fc; | |
2969 | ||
2970 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2971 | ifsta = &sdata->u.sta; | |
2972 | ||
2973 | rx_status = (struct ieee80211_rx_status *) skb->cb; | |
2974 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
2975 | fc = le16_to_cpu(mgmt->frame_control); | |
2976 | ||
2977 | switch (fc & IEEE80211_FCTL_STYPE) { | |
2978 | case IEEE80211_STYPE_PROBE_REQ: | |
2979 | ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len, | |
2980 | rx_status); | |
2981 | break; | |
2982 | case IEEE80211_STYPE_PROBE_RESP: | |
2983 | ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status); | |
2984 | break; | |
2985 | case IEEE80211_STYPE_BEACON: | |
2986 | ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status); | |
2987 | break; | |
2988 | case IEEE80211_STYPE_AUTH: | |
2989 | ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len); | |
2990 | break; | |
2991 | case IEEE80211_STYPE_ASSOC_RESP: | |
471b3efd | 2992 | ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0); |
f0706e82 JB |
2993 | break; |
2994 | case IEEE80211_STYPE_REASSOC_RESP: | |
471b3efd | 2995 | ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1); |
f0706e82 JB |
2996 | break; |
2997 | case IEEE80211_STYPE_DEAUTH: | |
2998 | ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len); | |
2999 | break; | |
3000 | case IEEE80211_STYPE_DISASSOC: | |
3001 | ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len); | |
3002 | break; | |
9f985b0e | 3003 | case IEEE80211_STYPE_ACTION: |
f709fc69 | 3004 | ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len, rx_status); |
9f985b0e | 3005 | break; |
f0706e82 JB |
3006 | } |
3007 | ||
3008 | kfree_skb(skb); | |
3009 | } | |
3010 | ||
3011 | ||
9ae54c84 | 3012 | ieee80211_rx_result |
ece8eddd ZY |
3013 | ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb, |
3014 | struct ieee80211_rx_status *rx_status) | |
f0706e82 JB |
3015 | { |
3016 | struct ieee80211_mgmt *mgmt; | |
3017 | u16 fc; | |
3018 | ||
ece8eddd | 3019 | if (skb->len < 2) |
e4c26add | 3020 | return RX_DROP_UNUSABLE; |
f0706e82 JB |
3021 | |
3022 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
3023 | fc = le16_to_cpu(mgmt->frame_control); | |
3024 | ||
ece8eddd | 3025 | if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL) |
9ae54c84 | 3026 | return RX_CONTINUE; |
ece8eddd ZY |
3027 | |
3028 | if (skb->len < 24) | |
e4c26add | 3029 | return RX_DROP_MONITOR; |
ece8eddd | 3030 | |
f0706e82 JB |
3031 | if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) { |
3032 | if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) { | |
3033 | ieee80211_rx_mgmt_probe_resp(dev, mgmt, | |
3034 | skb->len, rx_status); | |
ece8eddd | 3035 | dev_kfree_skb(skb); |
9ae54c84 | 3036 | return RX_QUEUED; |
f0706e82 JB |
3037 | } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) { |
3038 | ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, | |
3039 | rx_status); | |
ece8eddd | 3040 | dev_kfree_skb(skb); |
9ae54c84 | 3041 | return RX_QUEUED; |
f0706e82 JB |
3042 | } |
3043 | } | |
9ae54c84 | 3044 | return RX_CONTINUE; |
f0706e82 JB |
3045 | } |
3046 | ||
3047 | ||
3048 | static int ieee80211_sta_active_ibss(struct net_device *dev) | |
3049 | { | |
3050 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
3051 | int active = 0; | |
3052 | struct sta_info *sta; | |
d0709a65 | 3053 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
f0706e82 | 3054 | |
d0709a65 JB |
3055 | rcu_read_lock(); |
3056 | ||
3057 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
3058 | if (sta->sdata == sdata && | |
f0706e82 JB |
3059 | time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL, |
3060 | jiffies)) { | |
3061 | active++; | |
3062 | break; | |
3063 | } | |
3064 | } | |
d0709a65 JB |
3065 | |
3066 | rcu_read_unlock(); | |
f0706e82 JB |
3067 | |
3068 | return active; | |
3069 | } | |
3070 | ||
3071 | ||
f709fc69 | 3072 | static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time) |
f0706e82 JB |
3073 | { |
3074 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
3075 | struct sta_info *sta, *tmp; | |
be8755e1 | 3076 | LIST_HEAD(tmp_list); |
0795af57 | 3077 | DECLARE_MAC_BUF(mac); |
d0709a65 | 3078 | unsigned long flags; |
f0706e82 | 3079 | |
d0709a65 | 3080 | spin_lock_irqsave(&local->sta_lock, flags); |
f0706e82 | 3081 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) |
f709fc69 | 3082 | if (time_after(jiffies, sta->last_rx + exp_time)) { |
0795af57 JP |
3083 | printk(KERN_DEBUG "%s: expiring inactive STA %s\n", |
3084 | dev->name, print_mac(mac, sta->addr)); | |
cb585bcc | 3085 | __sta_info_unlink(&sta); |
d0709a65 JB |
3086 | if (sta) |
3087 | list_add(&sta->list, &tmp_list); | |
f0706e82 | 3088 | } |
d0709a65 | 3089 | spin_unlock_irqrestore(&local->sta_lock, flags); |
be8755e1 | 3090 | |
d0709a65 JB |
3091 | synchronize_rcu(); |
3092 | ||
3093 | rtnl_lock(); | |
3094 | list_for_each_entry_safe(sta, tmp, &tmp_list, list) | |
3095 | sta_info_destroy(sta); | |
3096 | rtnl_unlock(); | |
f0706e82 JB |
3097 | } |
3098 | ||
3099 | ||
3100 | static void ieee80211_sta_merge_ibss(struct net_device *dev, | |
3101 | struct ieee80211_if_sta *ifsta) | |
3102 | { | |
3103 | mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); | |
3104 | ||
f709fc69 | 3105 | ieee80211_sta_expire(dev, IEEE80211_IBSS_INACTIVITY_LIMIT); |
f0706e82 JB |
3106 | if (ieee80211_sta_active_ibss(dev)) |
3107 | return; | |
3108 | ||
3109 | printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other " | |
3110 | "IBSS networks with same SSID (merge)\n", dev->name); | |
3111 | ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len); | |
3112 | } | |
3113 | ||
3114 | ||
f709fc69 LCC |
3115 | #ifdef CONFIG_MAC80211_MESH |
3116 | static void ieee80211_mesh_housekeeping(struct net_device *dev, | |
3117 | struct ieee80211_if_sta *ifsta) | |
3118 | { | |
3119 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3120 | bool free_plinks; | |
3121 | ||
3122 | ieee80211_sta_expire(dev, IEEE80211_MESH_PEER_INACTIVITY_LIMIT); | |
3123 | mesh_path_expire(dev); | |
3124 | ||
3125 | free_plinks = mesh_plink_availables(sdata); | |
3126 | if (free_plinks != sdata->u.sta.accepting_plinks) | |
3127 | ieee80211_if_config_beacon(dev); | |
3128 | ||
3129 | mod_timer(&ifsta->timer, jiffies + | |
3130 | IEEE80211_MESH_HOUSEKEEPING_INTERVAL); | |
3131 | } | |
3132 | ||
3133 | ||
3134 | void ieee80211_start_mesh(struct net_device *dev) | |
3135 | { | |
3136 | struct ieee80211_if_sta *ifsta; | |
3137 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3138 | ifsta = &sdata->u.sta; | |
3139 | ifsta->state = IEEE80211_MESH_UP; | |
3140 | ieee80211_sta_timer((unsigned long)sdata); | |
3141 | } | |
3142 | #endif | |
3143 | ||
3144 | ||
f0706e82 JB |
3145 | void ieee80211_sta_timer(unsigned long data) |
3146 | { | |
3147 | struct ieee80211_sub_if_data *sdata = | |
3148 | (struct ieee80211_sub_if_data *) data; | |
3149 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
3150 | struct ieee80211_local *local = wdev_priv(&sdata->wdev); | |
3151 | ||
3152 | set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); | |
3153 | queue_work(local->hw.workqueue, &ifsta->work); | |
3154 | } | |
3155 | ||
f0706e82 JB |
3156 | void ieee80211_sta_work(struct work_struct *work) |
3157 | { | |
3158 | struct ieee80211_sub_if_data *sdata = | |
3159 | container_of(work, struct ieee80211_sub_if_data, u.sta.work); | |
3160 | struct net_device *dev = sdata->dev; | |
3161 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
3162 | struct ieee80211_if_sta *ifsta; | |
3163 | struct sk_buff *skb; | |
3164 | ||
3165 | if (!netif_running(dev)) | |
3166 | return; | |
3167 | ||
ece8eddd | 3168 | if (local->sta_sw_scanning || local->sta_hw_scanning) |
f0706e82 JB |
3169 | return; |
3170 | ||
51fb61e7 | 3171 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA && |
f709fc69 LCC |
3172 | sdata->vif.type != IEEE80211_IF_TYPE_IBSS && |
3173 | sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT) { | |
f0706e82 | 3174 | printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface " |
51fb61e7 | 3175 | "(type=%d)\n", dev->name, sdata->vif.type); |
f0706e82 JB |
3176 | return; |
3177 | } | |
3178 | ifsta = &sdata->u.sta; | |
3179 | ||
3180 | while ((skb = skb_dequeue(&ifsta->skb_queue))) | |
3181 | ieee80211_sta_rx_queued_mgmt(dev, skb); | |
3182 | ||
f709fc69 | 3183 | #ifdef CONFIG_MAC80211_MESH |
902acc78 JB |
3184 | if (ifsta->preq_queue_len && |
3185 | time_after(jiffies, | |
3186 | ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval))) | |
f709fc69 LCC |
3187 | mesh_path_start_discovery(dev); |
3188 | #endif | |
3189 | ||
f0706e82 JB |
3190 | if (ifsta->state != IEEE80211_AUTHENTICATE && |
3191 | ifsta->state != IEEE80211_ASSOCIATE && | |
3192 | test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) { | |
a0af5f14 HS |
3193 | if (ifsta->scan_ssid_len) |
3194 | ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len); | |
3195 | else | |
3196 | ieee80211_sta_start_scan(dev, NULL, 0); | |
f0706e82 JB |
3197 | return; |
3198 | } | |
3199 | ||
3200 | if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) { | |
3201 | if (ieee80211_sta_config_auth(dev, ifsta)) | |
3202 | return; | |
3203 | clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); | |
3204 | } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request)) | |
3205 | return; | |
3206 | ||
3207 | switch (ifsta->state) { | |
3208 | case IEEE80211_DISABLED: | |
3209 | break; | |
3210 | case IEEE80211_AUTHENTICATE: | |
3211 | ieee80211_authenticate(dev, ifsta); | |
3212 | break; | |
3213 | case IEEE80211_ASSOCIATE: | |
3214 | ieee80211_associate(dev, ifsta); | |
3215 | break; | |
3216 | case IEEE80211_ASSOCIATED: | |
3217 | ieee80211_associated(dev, ifsta); | |
3218 | break; | |
3219 | case IEEE80211_IBSS_SEARCH: | |
3220 | ieee80211_sta_find_ibss(dev, ifsta); | |
3221 | break; | |
3222 | case IEEE80211_IBSS_JOINED: | |
3223 | ieee80211_sta_merge_ibss(dev, ifsta); | |
3224 | break; | |
f709fc69 LCC |
3225 | #ifdef CONFIG_MAC80211_MESH |
3226 | case IEEE80211_MESH_UP: | |
3227 | ieee80211_mesh_housekeeping(dev, ifsta); | |
3228 | break; | |
3229 | #endif | |
f0706e82 JB |
3230 | default: |
3231 | printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n", | |
3232 | ifsta->state); | |
3233 | break; | |
3234 | } | |
3235 | ||
3236 | if (ieee80211_privacy_mismatch(dev, ifsta)) { | |
3237 | printk(KERN_DEBUG "%s: privacy configuration mismatch and " | |
3238 | "mixed-cell disabled - disassociate\n", dev->name); | |
3239 | ||
3240 | ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED); | |
3241 | ieee80211_set_disassoc(dev, ifsta, 0); | |
3242 | } | |
3243 | } | |
3244 | ||
3245 | ||
3246 | static void ieee80211_sta_reset_auth(struct net_device *dev, | |
3247 | struct ieee80211_if_sta *ifsta) | |
3248 | { | |
3249 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
3250 | ||
3251 | if (local->ops->reset_tsf) { | |
3252 | /* Reset own TSF to allow time synchronization work. */ | |
3253 | local->ops->reset_tsf(local_to_hw(local)); | |
3254 | } | |
3255 | ||
3256 | ifsta->wmm_last_param_set = -1; /* allow any WMM update */ | |
3257 | ||
3258 | ||
3259 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
3260 | ifsta->auth_alg = WLAN_AUTH_OPEN; | |
3261 | else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
3262 | ifsta->auth_alg = WLAN_AUTH_SHARED_KEY; | |
3263 | else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
3264 | ifsta->auth_alg = WLAN_AUTH_LEAP; | |
3265 | else | |
3266 | ifsta->auth_alg = WLAN_AUTH_OPEN; | |
3267 | printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name, | |
3268 | ifsta->auth_alg); | |
3269 | ifsta->auth_transaction = -1; | |
d6f2da5b JS |
3270 | ifsta->flags &= ~IEEE80211_STA_ASSOCIATED; |
3271 | ifsta->auth_tries = ifsta->assoc_tries = 0; | |
f0706e82 JB |
3272 | netif_carrier_off(dev); |
3273 | } | |
3274 | ||
3275 | ||
3276 | void ieee80211_sta_req_auth(struct net_device *dev, | |
3277 | struct ieee80211_if_sta *ifsta) | |
3278 | { | |
3279 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
3280 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3281 | ||
51fb61e7 | 3282 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
f0706e82 JB |
3283 | return; |
3284 | ||
d6f2da5b JS |
3285 | if ((ifsta->flags & (IEEE80211_STA_BSSID_SET | |
3286 | IEEE80211_STA_AUTO_BSSID_SEL)) && | |
3287 | (ifsta->flags & (IEEE80211_STA_SSID_SET | | |
3288 | IEEE80211_STA_AUTO_SSID_SEL))) { | |
f0706e82 JB |
3289 | set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); |
3290 | queue_work(local->hw.workqueue, &ifsta->work); | |
3291 | } | |
3292 | } | |
3293 | ||
3294 | static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta, | |
3295 | const char *ssid, int ssid_len) | |
3296 | { | |
3297 | int tmp, hidden_ssid; | |
3298 | ||
48225709 MW |
3299 | if (ssid_len == ifsta->ssid_len && |
3300 | !memcmp(ifsta->ssid, ssid, ssid_len)) | |
f0706e82 JB |
3301 | return 1; |
3302 | ||
d6f2da5b | 3303 | if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) |
f0706e82 JB |
3304 | return 0; |
3305 | ||
3306 | hidden_ssid = 1; | |
3307 | tmp = ssid_len; | |
3308 | while (tmp--) { | |
3309 | if (ssid[tmp] != '\0') { | |
3310 | hidden_ssid = 0; | |
3311 | break; | |
3312 | } | |
3313 | } | |
3314 | ||
3315 | if (hidden_ssid && ifsta->ssid_len == ssid_len) | |
3316 | return 1; | |
3317 | ||
3318 | if (ssid_len == 1 && ssid[0] == ' ') | |
3319 | return 1; | |
3320 | ||
3321 | return 0; | |
3322 | } | |
3323 | ||
3324 | static int ieee80211_sta_config_auth(struct net_device *dev, | |
3325 | struct ieee80211_if_sta *ifsta) | |
3326 | { | |
3327 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
3328 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3329 | struct ieee80211_sta_bss *bss, *selected = NULL; | |
3330 | int top_rssi = 0, freq; | |
3331 | ||
d6f2da5b JS |
3332 | if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL | |
3333 | IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) { | |
f0706e82 | 3334 | ifsta->state = IEEE80211_AUTHENTICATE; |
f0706e82 JB |
3335 | ieee80211_sta_reset_auth(dev, ifsta); |
3336 | return 0; | |
3337 | } | |
3338 | ||
3339 | spin_lock_bh(&local->sta_bss_lock); | |
8318d78a | 3340 | freq = local->oper_channel->center_freq; |
f0706e82 JB |
3341 | list_for_each_entry(bss, &local->sta_bss_list, list) { |
3342 | if (!(bss->capability & WLAN_CAPABILITY_ESS)) | |
3343 | continue; | |
3344 | ||
3345 | if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^ | |
3346 | !!sdata->default_key) | |
3347 | continue; | |
3348 | ||
d6f2da5b JS |
3349 | if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) && |
3350 | bss->freq != freq) | |
f0706e82 JB |
3351 | continue; |
3352 | ||
d6f2da5b | 3353 | if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) && |
f0706e82 JB |
3354 | memcmp(bss->bssid, ifsta->bssid, ETH_ALEN)) |
3355 | continue; | |
3356 | ||
d6f2da5b | 3357 | if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) && |
f0706e82 JB |
3358 | !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len)) |
3359 | continue; | |
3360 | ||
3361 | if (!selected || top_rssi < bss->rssi) { | |
3362 | selected = bss; | |
3363 | top_rssi = bss->rssi; | |
3364 | } | |
3365 | } | |
3366 | if (selected) | |
3367 | atomic_inc(&selected->users); | |
3368 | spin_unlock_bh(&local->sta_bss_lock); | |
3369 | ||
3370 | if (selected) { | |
8318d78a | 3371 | ieee80211_set_freq(local, selected->freq); |
d6f2da5b | 3372 | if (!(ifsta->flags & IEEE80211_STA_SSID_SET)) |
f0706e82 JB |
3373 | ieee80211_sta_set_ssid(dev, selected->ssid, |
3374 | selected->ssid_len); | |
3375 | ieee80211_sta_set_bssid(dev, selected->bssid); | |
e2839d8f | 3376 | ieee80211_sta_def_wmm_params(dev, selected, 0); |
f0706e82 JB |
3377 | ieee80211_rx_bss_put(dev, selected); |
3378 | ifsta->state = IEEE80211_AUTHENTICATE; | |
f0706e82 JB |
3379 | ieee80211_sta_reset_auth(dev, ifsta); |
3380 | return 0; | |
3381 | } else { | |
3382 | if (ifsta->state != IEEE80211_AUTHENTICATE) { | |
d6f2da5b | 3383 | if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) |
b9bf1e60 JL |
3384 | ieee80211_sta_start_scan(dev, NULL, 0); |
3385 | else | |
3386 | ieee80211_sta_start_scan(dev, ifsta->ssid, | |
3387 | ifsta->ssid_len); | |
f0706e82 JB |
3388 | ifsta->state = IEEE80211_AUTHENTICATE; |
3389 | set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); | |
3390 | } else | |
3391 | ifsta->state = IEEE80211_DISABLED; | |
3392 | } | |
f0706e82 JB |
3393 | return -1; |
3394 | } | |
3395 | ||
f0706e82 JB |
3396 | |
3397 | static int ieee80211_sta_create_ibss(struct net_device *dev, | |
3398 | struct ieee80211_if_sta *ifsta) | |
3399 | { | |
3400 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
3401 | struct ieee80211_sta_bss *bss; | |
cffdd30d | 3402 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
8318d78a | 3403 | struct ieee80211_supported_band *sband; |
f0706e82 JB |
3404 | u8 bssid[ETH_ALEN], *pos; |
3405 | int i; | |
0795af57 | 3406 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
3407 | |
3408 | #if 0 | |
3409 | /* Easier testing, use fixed BSSID. */ | |
3410 | memset(bssid, 0xfe, ETH_ALEN); | |
3411 | #else | |
3412 | /* Generate random, not broadcast, locally administered BSSID. Mix in | |
3413 | * own MAC address to make sure that devices that do not have proper | |
3414 | * random number generator get different BSSID. */ | |
3415 | get_random_bytes(bssid, ETH_ALEN); | |
3416 | for (i = 0; i < ETH_ALEN; i++) | |
3417 | bssid[i] ^= dev->dev_addr[i]; | |
3418 | bssid[0] &= ~0x01; | |
3419 | bssid[0] |= 0x02; | |
3420 | #endif | |
3421 | ||
0795af57 JP |
3422 | printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n", |
3423 | dev->name, print_mac(mac, bssid)); | |
f0706e82 | 3424 | |
8318d78a JB |
3425 | bss = ieee80211_rx_bss_add(dev, bssid, |
3426 | local->hw.conf.channel->center_freq, | |
cffdd30d | 3427 | sdata->u.sta.ssid, sdata->u.sta.ssid_len); |
f0706e82 JB |
3428 | if (!bss) |
3429 | return -ENOMEM; | |
3430 | ||
8318d78a JB |
3431 | bss->band = local->hw.conf.channel->band; |
3432 | sband = local->hw.wiphy->bands[bss->band]; | |
f0706e82 JB |
3433 | |
3434 | if (local->hw.conf.beacon_int == 0) | |
f709fc69 | 3435 | local->hw.conf.beacon_int = 10000; |
f0706e82 | 3436 | bss->beacon_int = local->hw.conf.beacon_int; |
f0706e82 JB |
3437 | bss->last_update = jiffies; |
3438 | bss->capability = WLAN_CAPABILITY_IBSS; | |
3439 | if (sdata->default_key) { | |
3440 | bss->capability |= WLAN_CAPABILITY_PRIVACY; | |
3441 | } else | |
3442 | sdata->drop_unencrypted = 0; | |
8318d78a | 3443 | bss->supp_rates_len = sband->n_bitrates; |
f0706e82 | 3444 | pos = bss->supp_rates; |
8318d78a JB |
3445 | for (i = 0; i < sband->n_bitrates; i++) { |
3446 | int rate = sband->bitrates[i].bitrate; | |
f0706e82 JB |
3447 | *pos++ = (u8) (rate / 5); |
3448 | } | |
3449 | ||
3450 | return ieee80211_sta_join_ibss(dev, ifsta, bss); | |
3451 | } | |
3452 | ||
3453 | ||
3454 | static int ieee80211_sta_find_ibss(struct net_device *dev, | |
3455 | struct ieee80211_if_sta *ifsta) | |
3456 | { | |
3457 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
3458 | struct ieee80211_sta_bss *bss; | |
3459 | int found = 0; | |
3460 | u8 bssid[ETH_ALEN]; | |
3461 | int active_ibss; | |
0795af57 JP |
3462 | DECLARE_MAC_BUF(mac); |
3463 | DECLARE_MAC_BUF(mac2); | |
f0706e82 JB |
3464 | |
3465 | if (ifsta->ssid_len == 0) | |
3466 | return -EINVAL; | |
3467 | ||
3468 | active_ibss = ieee80211_sta_active_ibss(dev); | |
3469 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
3470 | printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n", | |
3471 | dev->name, active_ibss); | |
3472 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
3473 | spin_lock_bh(&local->sta_bss_lock); | |
3474 | list_for_each_entry(bss, &local->sta_bss_list, list) { | |
3475 | if (ifsta->ssid_len != bss->ssid_len || | |
3476 | memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0 | |
3477 | || !(bss->capability & WLAN_CAPABILITY_IBSS)) | |
3478 | continue; | |
3479 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0795af57 JP |
3480 | printk(KERN_DEBUG " bssid=%s found\n", |
3481 | print_mac(mac, bss->bssid)); | |
f0706e82 JB |
3482 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
3483 | memcpy(bssid, bss->bssid, ETH_ALEN); | |
3484 | found = 1; | |
3485 | if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0) | |
3486 | break; | |
3487 | } | |
3488 | spin_unlock_bh(&local->sta_bss_lock); | |
3489 | ||
3490 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0795af57 JP |
3491 | printk(KERN_DEBUG " sta_find_ibss: selected %s current " |
3492 | "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid)); | |
f0706e82 JB |
3493 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
3494 | if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 && | |
8318d78a JB |
3495 | (bss = ieee80211_rx_bss_get(dev, bssid, |
3496 | local->hw.conf.channel->center_freq, | |
cffdd30d | 3497 | ifsta->ssid, ifsta->ssid_len))) { |
0795af57 | 3498 | printk(KERN_DEBUG "%s: Selected IBSS BSSID %s" |
f0706e82 | 3499 | " based on configured SSID\n", |
0795af57 | 3500 | dev->name, print_mac(mac, bssid)); |
f0706e82 JB |
3501 | return ieee80211_sta_join_ibss(dev, ifsta, bss); |
3502 | } | |
3503 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
3504 | printk(KERN_DEBUG " did not try to join ibss\n"); | |
3505 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
3506 | ||
3507 | /* Selected IBSS not found in current scan results - try to scan */ | |
3508 | if (ifsta->state == IEEE80211_IBSS_JOINED && | |
3509 | !ieee80211_sta_active_ibss(dev)) { | |
3510 | mod_timer(&ifsta->timer, jiffies + | |
3511 | IEEE80211_IBSS_MERGE_INTERVAL); | |
3512 | } else if (time_after(jiffies, local->last_scan_completed + | |
3513 | IEEE80211_SCAN_INTERVAL)) { | |
3514 | printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to " | |
3515 | "join\n", dev->name); | |
3516 | return ieee80211_sta_req_scan(dev, ifsta->ssid, | |
3517 | ifsta->ssid_len); | |
3518 | } else if (ifsta->state != IEEE80211_IBSS_JOINED) { | |
3519 | int interval = IEEE80211_SCAN_INTERVAL; | |
3520 | ||
3521 | if (time_after(jiffies, ifsta->ibss_join_req + | |
3522 | IEEE80211_IBSS_JOIN_TIMEOUT)) { | |
d6f2da5b | 3523 | if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) && |
8318d78a JB |
3524 | (!(local->oper_channel->flags & |
3525 | IEEE80211_CHAN_NO_IBSS))) | |
f0706e82 | 3526 | return ieee80211_sta_create_ibss(dev, ifsta); |
d6f2da5b | 3527 | if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) { |
8318d78a JB |
3528 | printk(KERN_DEBUG "%s: IBSS not allowed on" |
3529 | " %d MHz\n", dev->name, | |
3530 | local->hw.conf.channel->center_freq); | |
f0706e82 JB |
3531 | } |
3532 | ||
3533 | /* No IBSS found - decrease scan interval and continue | |
3534 | * scanning. */ | |
3535 | interval = IEEE80211_SCAN_INTERVAL_SLOW; | |
3536 | } | |
3537 | ||
3538 | ifsta->state = IEEE80211_IBSS_SEARCH; | |
3539 | mod_timer(&ifsta->timer, jiffies + interval); | |
3540 | return 0; | |
3541 | } | |
3542 | ||
3543 | return 0; | |
3544 | } | |
3545 | ||
3546 | ||
3547 | int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len) | |
3548 | { | |
8318d78a | 3549 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
f0706e82 | 3550 | struct ieee80211_if_sta *ifsta; |
f0706e82 JB |
3551 | |
3552 | if (len > IEEE80211_MAX_SSID_LEN) | |
3553 | return -EINVAL; | |
3554 | ||
f0706e82 JB |
3555 | ifsta = &sdata->u.sta; |
3556 | ||
3557 | if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) | |
d6f2da5b | 3558 | ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
f0706e82 JB |
3559 | memcpy(ifsta->ssid, ssid, len); |
3560 | memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len); | |
3561 | ifsta->ssid_len = len; | |
3562 | ||
d6f2da5b JS |
3563 | if (len) |
3564 | ifsta->flags |= IEEE80211_STA_SSID_SET; | |
3565 | else | |
3566 | ifsta->flags &= ~IEEE80211_STA_SSID_SET; | |
51fb61e7 | 3567 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && |
d6f2da5b | 3568 | !(ifsta->flags & IEEE80211_STA_BSSID_SET)) { |
f0706e82 JB |
3569 | ifsta->ibss_join_req = jiffies; |
3570 | ifsta->state = IEEE80211_IBSS_SEARCH; | |
3571 | return ieee80211_sta_find_ibss(dev, ifsta); | |
3572 | } | |
3573 | return 0; | |
3574 | } | |
3575 | ||
3576 | ||
3577 | int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len) | |
3578 | { | |
3579 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3580 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
3581 | memcpy(ssid, ifsta->ssid, ifsta->ssid_len); | |
3582 | *len = ifsta->ssid_len; | |
3583 | return 0; | |
3584 | } | |
3585 | ||
3586 | ||
3587 | int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid) | |
3588 | { | |
3589 | struct ieee80211_sub_if_data *sdata; | |
3590 | struct ieee80211_if_sta *ifsta; | |
3591 | int res; | |
3592 | ||
3593 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3594 | ifsta = &sdata->u.sta; | |
3595 | ||
3596 | if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) { | |
3597 | memcpy(ifsta->bssid, bssid, ETH_ALEN); | |
3598 | res = ieee80211_if_config(dev); | |
3599 | if (res) { | |
3600 | printk(KERN_DEBUG "%s: Failed to config new BSSID to " | |
3601 | "the low-level driver\n", dev->name); | |
3602 | return res; | |
3603 | } | |
3604 | } | |
3605 | ||
d6f2da5b JS |
3606 | if (is_valid_ether_addr(bssid)) |
3607 | ifsta->flags |= IEEE80211_STA_BSSID_SET; | |
f0706e82 | 3608 | else |
d6f2da5b JS |
3609 | ifsta->flags &= ~IEEE80211_STA_BSSID_SET; |
3610 | ||
f0706e82 JB |
3611 | return 0; |
3612 | } | |
3613 | ||
3614 | ||
3615 | static void ieee80211_send_nullfunc(struct ieee80211_local *local, | |
3616 | struct ieee80211_sub_if_data *sdata, | |
3617 | int powersave) | |
3618 | { | |
3619 | struct sk_buff *skb; | |
3620 | struct ieee80211_hdr *nullfunc; | |
3621 | u16 fc; | |
3622 | ||
3623 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24); | |
3624 | if (!skb) { | |
3625 | printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc " | |
3626 | "frame\n", sdata->dev->name); | |
3627 | return; | |
3628 | } | |
3629 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
3630 | ||
3631 | nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24); | |
3632 | memset(nullfunc, 0, 24); | |
3633 | fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | | |
3634 | IEEE80211_FCTL_TODS; | |
3635 | if (powersave) | |
3636 | fc |= IEEE80211_FCTL_PM; | |
3637 | nullfunc->frame_control = cpu_to_le16(fc); | |
3638 | memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN); | |
3639 | memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN); | |
3640 | memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN); | |
3641 | ||
3642 | ieee80211_sta_tx(sdata->dev, skb, 0); | |
3643 | } | |
3644 | ||
3645 | ||
69d3b6f4 JB |
3646 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
3647 | { | |
3648 | if (sdata->vif.type == IEEE80211_IF_TYPE_STA || | |
3649 | ieee80211_vif_is_mesh(&sdata->vif)) | |
3650 | ieee80211_sta_timer((unsigned long)sdata); | |
3651 | } | |
3652 | ||
f0706e82 JB |
3653 | void ieee80211_scan_completed(struct ieee80211_hw *hw) |
3654 | { | |
3655 | struct ieee80211_local *local = hw_to_local(hw); | |
3656 | struct net_device *dev = local->scan_dev; | |
3657 | struct ieee80211_sub_if_data *sdata; | |
3658 | union iwreq_data wrqu; | |
3659 | ||
3660 | local->last_scan_completed = jiffies; | |
ece8eddd ZY |
3661 | memset(&wrqu, 0, sizeof(wrqu)); |
3662 | wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL); | |
f0706e82 | 3663 | |
ece8eddd ZY |
3664 | if (local->sta_hw_scanning) { |
3665 | local->sta_hw_scanning = 0; | |
675ef586 MA |
3666 | if (ieee80211_hw_config(local)) |
3667 | printk(KERN_DEBUG "%s: failed to restore operational " | |
3668 | "channel after scan\n", dev->name); | |
69d3b6f4 JB |
3669 | /* Restart STA timer for HW scan case */ |
3670 | rcu_read_lock(); | |
3671 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
3672 | ieee80211_restart_sta_timer(sdata); | |
3673 | rcu_read_unlock(); | |
3674 | ||
ece8eddd ZY |
3675 | goto done; |
3676 | } | |
3677 | ||
3678 | local->sta_sw_scanning = 0; | |
f0706e82 | 3679 | if (ieee80211_hw_config(local)) |
4b50e388 | 3680 | printk(KERN_DEBUG "%s: failed to restore operational " |
f0706e82 JB |
3681 | "channel after scan\n", dev->name); |
3682 | ||
4150c572 JB |
3683 | |
3684 | netif_tx_lock_bh(local->mdev); | |
3685 | local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC; | |
3686 | local->ops->configure_filter(local_to_hw(local), | |
3687 | FIF_BCN_PRBRESP_PROMISC, | |
3688 | &local->filter_flags, | |
3689 | local->mdev->mc_count, | |
3690 | local->mdev->mc_list); | |
3691 | ||
3692 | netif_tx_unlock_bh(local->mdev); | |
f0706e82 | 3693 | |
79010420 JB |
3694 | rcu_read_lock(); |
3695 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
14042cbe MN |
3696 | |
3697 | /* No need to wake the master device. */ | |
3698 | if (sdata->dev == local->mdev) | |
3699 | continue; | |
3700 | ||
69d3b6f4 JB |
3701 | /* Tell AP we're back */ |
3702 | if (sdata->vif.type == IEEE80211_IF_TYPE_STA && | |
3703 | sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED) | |
3704 | ieee80211_send_nullfunc(local, sdata, 0); | |
14042cbe | 3705 | |
69d3b6f4 | 3706 | ieee80211_restart_sta_timer(sdata); |
f709fc69 | 3707 | |
f0706e82 JB |
3708 | netif_wake_queue(sdata->dev); |
3709 | } | |
79010420 | 3710 | rcu_read_unlock(); |
f0706e82 | 3711 | |
ece8eddd | 3712 | done: |
f0706e82 | 3713 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
51fb61e7 | 3714 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) { |
f0706e82 | 3715 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
d6f2da5b | 3716 | if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) || |
f0706e82 JB |
3717 | (!ifsta->state == IEEE80211_IBSS_JOINED && |
3718 | !ieee80211_sta_active_ibss(dev))) | |
3719 | ieee80211_sta_find_ibss(dev, ifsta); | |
3720 | } | |
3721 | } | |
3722 | EXPORT_SYMBOL(ieee80211_scan_completed); | |
3723 | ||
3724 | void ieee80211_sta_scan_work(struct work_struct *work) | |
3725 | { | |
3726 | struct ieee80211_local *local = | |
3727 | container_of(work, struct ieee80211_local, scan_work.work); | |
3728 | struct net_device *dev = local->scan_dev; | |
3729 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
8318d78a | 3730 | struct ieee80211_supported_band *sband; |
f0706e82 JB |
3731 | struct ieee80211_channel *chan; |
3732 | int skip; | |
3733 | unsigned long next_delay = 0; | |
3734 | ||
ece8eddd | 3735 | if (!local->sta_sw_scanning) |
f0706e82 JB |
3736 | return; |
3737 | ||
3738 | switch (local->scan_state) { | |
3739 | case SCAN_SET_CHANNEL: | |
69d464d5 JB |
3740 | /* |
3741 | * Get current scan band. scan_band may be IEEE80211_NUM_BANDS | |
3742 | * after we successfully scanned the last channel of the last | |
3743 | * band (and the last band is supported by the hw) | |
3744 | */ | |
8318d78a JB |
3745 | if (local->scan_band < IEEE80211_NUM_BANDS) |
3746 | sband = local->hw.wiphy->bands[local->scan_band]; | |
3747 | else | |
3748 | sband = NULL; | |
3749 | ||
69d464d5 JB |
3750 | /* |
3751 | * If we are at an unsupported band and have more bands | |
3752 | * left to scan, advance to the next supported one. | |
3753 | */ | |
3754 | while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) { | |
8318d78a JB |
3755 | local->scan_band++; |
3756 | sband = local->hw.wiphy->bands[local->scan_band]; | |
3757 | local->scan_channel_idx = 0; | |
3758 | } | |
3759 | ||
69d464d5 JB |
3760 | /* if no more bands/channels left, complete scan */ |
3761 | if (!sband || local->scan_channel_idx >= sband->n_channels) { | |
f0706e82 JB |
3762 | ieee80211_scan_completed(local_to_hw(local)); |
3763 | return; | |
3764 | } | |
8318d78a JB |
3765 | skip = 0; |
3766 | chan = &sband->channels[local->scan_channel_idx]; | |
3767 | ||
3768 | if (chan->flags & IEEE80211_CHAN_DISABLED || | |
51fb61e7 | 3769 | (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && |
8318d78a | 3770 | chan->flags & IEEE80211_CHAN_NO_IBSS)) |
f0706e82 JB |
3771 | skip = 1; |
3772 | ||
3773 | if (!skip) { | |
f0706e82 JB |
3774 | local->scan_channel = chan; |
3775 | if (ieee80211_hw_config(local)) { | |
8318d78a JB |
3776 | printk(KERN_DEBUG "%s: failed to set freq to " |
3777 | "%d MHz for scan\n", dev->name, | |
3778 | chan->center_freq); | |
f0706e82 JB |
3779 | skip = 1; |
3780 | } | |
3781 | } | |
3782 | ||
69d464d5 | 3783 | /* advance state machine to next channel/band */ |
f0706e82 | 3784 | local->scan_channel_idx++; |
8318d78a | 3785 | if (local->scan_channel_idx >= sband->n_channels) { |
69d464d5 JB |
3786 | /* |
3787 | * scan_band may end up == IEEE80211_NUM_BANDS, but | |
3788 | * we'll catch that case above and complete the scan | |
3789 | * if that is the case. | |
3790 | */ | |
8318d78a JB |
3791 | local->scan_band++; |
3792 | local->scan_channel_idx = 0; | |
f0706e82 JB |
3793 | } |
3794 | ||
3795 | if (skip) | |
3796 | break; | |
3797 | ||
3798 | next_delay = IEEE80211_PROBE_DELAY + | |
3799 | usecs_to_jiffies(local->hw.channel_change_time); | |
3800 | local->scan_state = SCAN_SEND_PROBE; | |
3801 | break; | |
3802 | case SCAN_SEND_PROBE: | |
8318d78a | 3803 | next_delay = IEEE80211_PASSIVE_CHANNEL_TIME; |
f0706e82 | 3804 | local->scan_state = SCAN_SET_CHANNEL; |
8318d78a JB |
3805 | |
3806 | if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN) | |
3807 | break; | |
3808 | ieee80211_send_probe_req(dev, NULL, local->scan_ssid, | |
3809 | local->scan_ssid_len); | |
3810 | next_delay = IEEE80211_CHANNEL_TIME; | |
f0706e82 JB |
3811 | break; |
3812 | } | |
3813 | ||
ece8eddd | 3814 | if (local->sta_sw_scanning) |
f0706e82 JB |
3815 | queue_delayed_work(local->hw.workqueue, &local->scan_work, |
3816 | next_delay); | |
3817 | } | |
3818 | ||
3819 | ||
3820 | static int ieee80211_sta_start_scan(struct net_device *dev, | |
3821 | u8 *ssid, size_t ssid_len) | |
3822 | { | |
3823 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
3824 | struct ieee80211_sub_if_data *sdata; | |
3825 | ||
3826 | if (ssid_len > IEEE80211_MAX_SSID_LEN) | |
3827 | return -EINVAL; | |
3828 | ||
3829 | /* MLME-SCAN.request (page 118) page 144 (11.1.3.1) | |
3830 | * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS | |
3831 | * BSSID: MACAddress | |
3832 | * SSID | |
3833 | * ScanType: ACTIVE, PASSIVE | |
3834 | * ProbeDelay: delay (in microseconds) to be used prior to transmitting | |
3835 | * a Probe frame during active scanning | |
3836 | * ChannelList | |
3837 | * MinChannelTime (>= ProbeDelay), in TU | |
3838 | * MaxChannelTime: (>= MinChannelTime), in TU | |
3839 | */ | |
3840 | ||
3841 | /* MLME-SCAN.confirm | |
3842 | * BSSDescriptionSet | |
3843 | * ResultCode: SUCCESS, INVALID_PARAMETERS | |
3844 | */ | |
3845 | ||
ece8eddd | 3846 | if (local->sta_sw_scanning || local->sta_hw_scanning) { |
f0706e82 JB |
3847 | if (local->scan_dev == dev) |
3848 | return 0; | |
3849 | return -EBUSY; | |
3850 | } | |
3851 | ||
3852 | if (local->ops->hw_scan) { | |
3853 | int rc = local->ops->hw_scan(local_to_hw(local), | |
ece8eddd | 3854 | ssid, ssid_len); |
f0706e82 | 3855 | if (!rc) { |
ece8eddd | 3856 | local->sta_hw_scanning = 1; |
f0706e82 JB |
3857 | local->scan_dev = dev; |
3858 | } | |
3859 | return rc; | |
3860 | } | |
3861 | ||
ece8eddd | 3862 | local->sta_sw_scanning = 1; |
f0706e82 | 3863 | |
79010420 JB |
3864 | rcu_read_lock(); |
3865 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
14042cbe MN |
3866 | |
3867 | /* Don't stop the master interface, otherwise we can't transmit | |
3868 | * probes! */ | |
3869 | if (sdata->dev == local->mdev) | |
3870 | continue; | |
3871 | ||
f0706e82 | 3872 | netif_stop_queue(sdata->dev); |
51fb61e7 | 3873 | if (sdata->vif.type == IEEE80211_IF_TYPE_STA && |
d6f2da5b | 3874 | (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)) |
f0706e82 JB |
3875 | ieee80211_send_nullfunc(local, sdata, 1); |
3876 | } | |
79010420 | 3877 | rcu_read_unlock(); |
f0706e82 JB |
3878 | |
3879 | if (ssid) { | |
3880 | local->scan_ssid_len = ssid_len; | |
3881 | memcpy(local->scan_ssid, ssid, ssid_len); | |
3882 | } else | |
3883 | local->scan_ssid_len = 0; | |
3884 | local->scan_state = SCAN_SET_CHANNEL; | |
f0706e82 | 3885 | local->scan_channel_idx = 0; |
8318d78a | 3886 | local->scan_band = IEEE80211_BAND_2GHZ; |
f0706e82 JB |
3887 | local->scan_dev = dev; |
3888 | ||
4150c572 JB |
3889 | netif_tx_lock_bh(local->mdev); |
3890 | local->filter_flags |= FIF_BCN_PRBRESP_PROMISC; | |
3891 | local->ops->configure_filter(local_to_hw(local), | |
3892 | FIF_BCN_PRBRESP_PROMISC, | |
3893 | &local->filter_flags, | |
3894 | local->mdev->mc_count, | |
3895 | local->mdev->mc_list); | |
3896 | netif_tx_unlock_bh(local->mdev); | |
f0706e82 JB |
3897 | |
3898 | /* TODO: start scan as soon as all nullfunc frames are ACKed */ | |
3899 | queue_delayed_work(local->hw.workqueue, &local->scan_work, | |
3900 | IEEE80211_CHANNEL_TIME); | |
3901 | ||
3902 | return 0; | |
3903 | } | |
3904 | ||
3905 | ||
3906 | int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len) | |
3907 | { | |
3908 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3909 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
3910 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
3911 | ||
51fb61e7 | 3912 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
f0706e82 JB |
3913 | return ieee80211_sta_start_scan(dev, ssid, ssid_len); |
3914 | ||
ece8eddd | 3915 | if (local->sta_sw_scanning || local->sta_hw_scanning) { |
f0706e82 JB |
3916 | if (local->scan_dev == dev) |
3917 | return 0; | |
3918 | return -EBUSY; | |
3919 | } | |
3920 | ||
a0af5f14 HS |
3921 | ifsta->scan_ssid_len = ssid_len; |
3922 | if (ssid_len) | |
3923 | memcpy(ifsta->scan_ssid, ssid, ssid_len); | |
f0706e82 JB |
3924 | set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request); |
3925 | queue_work(local->hw.workqueue, &ifsta->work); | |
3926 | return 0; | |
3927 | } | |
3928 | ||
3929 | static char * | |
3930 | ieee80211_sta_scan_result(struct net_device *dev, | |
3931 | struct ieee80211_sta_bss *bss, | |
3932 | char *current_ev, char *end_buf) | |
3933 | { | |
3934 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
3935 | struct iw_event iwe; | |
3936 | ||
3937 | if (time_after(jiffies, | |
3938 | bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE)) | |
3939 | return current_ev; | |
3940 | ||
f0706e82 JB |
3941 | memset(&iwe, 0, sizeof(iwe)); |
3942 | iwe.cmd = SIOCGIWAP; | |
3943 | iwe.u.ap_addr.sa_family = ARPHRD_ETHER; | |
3944 | memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN); | |
3945 | current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, | |
3946 | IW_EV_ADDR_LEN); | |
3947 | ||
3948 | memset(&iwe, 0, sizeof(iwe)); | |
3949 | iwe.cmd = SIOCGIWESSID; | |
902acc78 JB |
3950 | if (bss_mesh_cfg(bss)) { |
3951 | iwe.u.data.length = bss_mesh_id_len(bss); | |
f709fc69 LCC |
3952 | iwe.u.data.flags = 1; |
3953 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, | |
902acc78 | 3954 | bss_mesh_id(bss)); |
f709fc69 LCC |
3955 | } else { |
3956 | iwe.u.data.length = bss->ssid_len; | |
3957 | iwe.u.data.flags = 1; | |
3958 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, | |
3959 | bss->ssid); | |
3960 | } | |
f0706e82 | 3961 | |
1d1b5359 LCC |
3962 | if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS) |
3963 | || bss_mesh_cfg(bss)) { | |
f0706e82 JB |
3964 | memset(&iwe, 0, sizeof(iwe)); |
3965 | iwe.cmd = SIOCGIWMODE; | |
902acc78 | 3966 | if (bss_mesh_cfg(bss)) |
f709fc69 LCC |
3967 | iwe.u.mode = IW_MODE_MESH; |
3968 | else if (bss->capability & WLAN_CAPABILITY_ESS) | |
f0706e82 JB |
3969 | iwe.u.mode = IW_MODE_MASTER; |
3970 | else | |
3971 | iwe.u.mode = IW_MODE_ADHOC; | |
3972 | current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, | |
3973 | IW_EV_UINT_LEN); | |
3974 | } | |
3975 | ||
3976 | memset(&iwe, 0, sizeof(iwe)); | |
3977 | iwe.cmd = SIOCGIWFREQ; | |
8318d78a JB |
3978 | iwe.u.freq.m = bss->freq; |
3979 | iwe.u.freq.e = 6; | |
f0706e82 JB |
3980 | current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, |
3981 | IW_EV_FREQ_LEN); | |
8318d78a JB |
3982 | |
3983 | memset(&iwe, 0, sizeof(iwe)); | |
3984 | iwe.cmd = SIOCGIWFREQ; | |
3985 | iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq); | |
3986 | iwe.u.freq.e = 0; | |
f0706e82 JB |
3987 | current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, |
3988 | IW_EV_FREQ_LEN); | |
3989 | ||
3990 | memset(&iwe, 0, sizeof(iwe)); | |
3991 | iwe.cmd = IWEVQUAL; | |
3992 | iwe.u.qual.qual = bss->signal; | |
3993 | iwe.u.qual.level = bss->rssi; | |
3994 | iwe.u.qual.noise = bss->noise; | |
3995 | iwe.u.qual.updated = local->wstats_flags; | |
3996 | current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, | |
3997 | IW_EV_QUAL_LEN); | |
3998 | ||
3999 | memset(&iwe, 0, sizeof(iwe)); | |
4000 | iwe.cmd = SIOCGIWENCODE; | |
4001 | if (bss->capability & WLAN_CAPABILITY_PRIVACY) | |
4002 | iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY; | |
4003 | else | |
4004 | iwe.u.data.flags = IW_ENCODE_DISABLED; | |
4005 | iwe.u.data.length = 0; | |
4006 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, ""); | |
4007 | ||
4008 | if (bss && bss->wpa_ie) { | |
4009 | memset(&iwe, 0, sizeof(iwe)); | |
4010 | iwe.cmd = IWEVGENIE; | |
4011 | iwe.u.data.length = bss->wpa_ie_len; | |
4012 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, | |
4013 | bss->wpa_ie); | |
4014 | } | |
4015 | ||
4016 | if (bss && bss->rsn_ie) { | |
4017 | memset(&iwe, 0, sizeof(iwe)); | |
4018 | iwe.cmd = IWEVGENIE; | |
4019 | iwe.u.data.length = bss->rsn_ie_len; | |
4020 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, | |
4021 | bss->rsn_ie); | |
4022 | } | |
4023 | ||
4024 | if (bss && bss->supp_rates_len > 0) { | |
4025 | /* display all supported rates in readable format */ | |
4026 | char *p = current_ev + IW_EV_LCP_LEN; | |
4027 | int i; | |
4028 | ||
4029 | memset(&iwe, 0, sizeof(iwe)); | |
4030 | iwe.cmd = SIOCGIWRATE; | |
4031 | /* Those two flags are ignored... */ | |
4032 | iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0; | |
4033 | ||
4034 | for (i = 0; i < bss->supp_rates_len; i++) { | |
4035 | iwe.u.bitrate.value = ((bss->supp_rates[i] & | |
4036 | 0x7f) * 500000); | |
4037 | p = iwe_stream_add_value(current_ev, p, | |
4038 | end_buf, &iwe, IW_EV_PARAM_LEN); | |
4039 | } | |
4040 | current_ev = p; | |
4041 | } | |
4042 | ||
4043 | if (bss) { | |
4044 | char *buf; | |
4045 | buf = kmalloc(30, GFP_ATOMIC); | |
4046 | if (buf) { | |
4047 | memset(&iwe, 0, sizeof(iwe)); | |
4048 | iwe.cmd = IWEVCUSTOM; | |
4049 | sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp)); | |
4050 | iwe.u.data.length = strlen(buf); | |
4051 | current_ev = iwe_stream_add_point(current_ev, end_buf, | |
4052 | &iwe, buf); | |
4053 | kfree(buf); | |
4054 | } | |
4055 | } | |
4056 | ||
902acc78 | 4057 | if (bss_mesh_cfg(bss)) { |
f709fc69 | 4058 | char *buf; |
24736701 | 4059 | u8 *cfg = bss_mesh_cfg(bss); |
4f5d4c4d | 4060 | buf = kmalloc(50, GFP_ATOMIC); |
f709fc69 LCC |
4061 | if (buf) { |
4062 | memset(&iwe, 0, sizeof(iwe)); | |
4063 | iwe.cmd = IWEVCUSTOM; | |
24736701 | 4064 | sprintf(buf, "Mesh network (version %d)", cfg[0]); |
4f5d4c4d LCC |
4065 | iwe.u.data.length = strlen(buf); |
4066 | current_ev = iwe_stream_add_point(current_ev, end_buf, | |
4067 | &iwe, buf); | |
4068 | sprintf(buf, "Path Selection Protocol ID: " | |
24736701 JL |
4069 | "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3], |
4070 | cfg[4]); | |
4f5d4c4d LCC |
4071 | iwe.u.data.length = strlen(buf); |
4072 | current_ev = iwe_stream_add_point(current_ev, end_buf, | |
4073 | &iwe, buf); | |
4074 | sprintf(buf, "Path Selection Metric ID: " | |
24736701 JL |
4075 | "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7], |
4076 | cfg[8]); | |
4f5d4c4d LCC |
4077 | iwe.u.data.length = strlen(buf); |
4078 | current_ev = iwe_stream_add_point(current_ev, end_buf, | |
4079 | &iwe, buf); | |
4080 | sprintf(buf, "Congestion Control Mode ID: " | |
24736701 JL |
4081 | "0x%02X%02X%02X%02X", cfg[9], cfg[10], |
4082 | cfg[11], cfg[12]); | |
4f5d4c4d LCC |
4083 | iwe.u.data.length = strlen(buf); |
4084 | current_ev = iwe_stream_add_point(current_ev, end_buf, | |
4085 | &iwe, buf); | |
4086 | sprintf(buf, "Channel Precedence: " | |
24736701 JL |
4087 | "0x%02X%02X%02X%02X", cfg[13], cfg[14], |
4088 | cfg[15], cfg[16]); | |
f709fc69 LCC |
4089 | iwe.u.data.length = strlen(buf); |
4090 | current_ev = iwe_stream_add_point(current_ev, end_buf, | |
4091 | &iwe, buf); | |
4092 | kfree(buf); | |
4093 | } | |
4094 | } | |
4095 | ||
f0706e82 JB |
4096 | return current_ev; |
4097 | } | |
4098 | ||
4099 | ||
4100 | int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len) | |
4101 | { | |
4102 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
4103 | char *current_ev = buf; | |
4104 | char *end_buf = buf + len; | |
4105 | struct ieee80211_sta_bss *bss; | |
4106 | ||
4107 | spin_lock_bh(&local->sta_bss_lock); | |
4108 | list_for_each_entry(bss, &local->sta_bss_list, list) { | |
4109 | if (buf + len - current_ev <= IW_EV_ADDR_LEN) { | |
4110 | spin_unlock_bh(&local->sta_bss_lock); | |
4111 | return -E2BIG; | |
4112 | } | |
4113 | current_ev = ieee80211_sta_scan_result(dev, bss, current_ev, | |
4114 | end_buf); | |
4115 | } | |
4116 | spin_unlock_bh(&local->sta_bss_lock); | |
4117 | return current_ev - buf; | |
4118 | } | |
4119 | ||
4120 | ||
4121 | int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len) | |
4122 | { | |
4123 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
4124 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
4125 | kfree(ifsta->extra_ie); | |
4126 | if (len == 0) { | |
4127 | ifsta->extra_ie = NULL; | |
4128 | ifsta->extra_ie_len = 0; | |
4129 | return 0; | |
4130 | } | |
4131 | ifsta->extra_ie = kmalloc(len, GFP_KERNEL); | |
4132 | if (!ifsta->extra_ie) { | |
4133 | ifsta->extra_ie_len = 0; | |
4134 | return -ENOMEM; | |
4135 | } | |
4136 | memcpy(ifsta->extra_ie, ie, len); | |
4137 | ifsta->extra_ie_len = len; | |
4138 | return 0; | |
4139 | } | |
4140 | ||
4141 | ||
4142 | struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev, | |
4143 | struct sk_buff *skb, u8 *bssid, | |
4144 | u8 *addr) | |
4145 | { | |
4146 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
4147 | struct sta_info *sta; | |
91fa558b | 4148 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
0795af57 | 4149 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
4150 | |
4151 | /* TODO: Could consider removing the least recently used entry and | |
4152 | * allow new one to be added. */ | |
4153 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { | |
4154 | if (net_ratelimit()) { | |
4155 | printk(KERN_DEBUG "%s: No room for a new IBSS STA " | |
0795af57 | 4156 | "entry %s\n", dev->name, print_mac(mac, addr)); |
f0706e82 JB |
4157 | } |
4158 | return NULL; | |
4159 | } | |
4160 | ||
0795af57 | 4161 | printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n", |
dd1cd4c6 | 4162 | wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name); |
f0706e82 | 4163 | |
73651ee6 JB |
4164 | sta = sta_info_alloc(sdata, addr, GFP_ATOMIC); |
4165 | if (!sta) | |
f0706e82 JB |
4166 | return NULL; |
4167 | ||
238814fd JB |
4168 | sta->flags |= WLAN_STA_AUTHORIZED; |
4169 | ||
8318d78a JB |
4170 | sta->supp_rates[local->hw.conf.channel->band] = |
4171 | sdata->u.sta.supp_rates_bits[local->hw.conf.channel->band]; | |
f0706e82 JB |
4172 | |
4173 | rate_control_rate_init(sta, local); | |
4174 | ||
93e5deb1 | 4175 | if (sta_info_insert(sta)) |
73651ee6 | 4176 | return NULL; |
73651ee6 | 4177 | |
d0709a65 | 4178 | return sta; |
f0706e82 JB |
4179 | } |
4180 | ||
4181 | ||
4182 | int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason) | |
4183 | { | |
4184 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
4185 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
4186 | ||
4187 | printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n", | |
4188 | dev->name, reason); | |
4189 | ||
51fb61e7 JB |
4190 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA && |
4191 | sdata->vif.type != IEEE80211_IF_TYPE_IBSS) | |
f0706e82 JB |
4192 | return -EINVAL; |
4193 | ||
4194 | ieee80211_send_deauth(dev, ifsta, reason); | |
4195 | ieee80211_set_disassoc(dev, ifsta, 1); | |
4196 | return 0; | |
4197 | } | |
4198 | ||
4199 | ||
4200 | int ieee80211_sta_disassociate(struct net_device *dev, u16 reason) | |
4201 | { | |
4202 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
4203 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
4204 | ||
4205 | printk(KERN_DEBUG "%s: disassociate(reason=%d)\n", | |
4206 | dev->name, reason); | |
4207 | ||
51fb61e7 | 4208 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
f0706e82 JB |
4209 | return -EINVAL; |
4210 | ||
d6f2da5b | 4211 | if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED)) |
f0706e82 JB |
4212 | return -1; |
4213 | ||
4214 | ieee80211_send_disassoc(dev, ifsta, reason); | |
4215 | ieee80211_set_disassoc(dev, ifsta, 0); | |
4216 | return 0; | |
4217 | } |