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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> | |
f0706e82 JB |
27 | #include <net/iw_handler.h> |
28 | #include <asm/types.h> | |
f0706e82 JB |
29 | |
30 | #include <net/mac80211.h> | |
31 | #include "ieee80211_i.h" | |
32 | #include "ieee80211_rate.h" | |
47f0c502 | 33 | #include "ieee80211_led.h" |
f0706e82 JB |
34 | |
35 | #define IEEE80211_AUTH_TIMEOUT (HZ / 5) | |
36 | #define IEEE80211_AUTH_MAX_TRIES 3 | |
37 | #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) | |
38 | #define IEEE80211_ASSOC_MAX_TRIES 3 | |
39 | #define IEEE80211_MONITORING_INTERVAL (2 * HZ) | |
40 | #define IEEE80211_PROBE_INTERVAL (60 * HZ) | |
41 | #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ) | |
42 | #define IEEE80211_SCAN_INTERVAL (2 * HZ) | |
43 | #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ) | |
44 | #define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ) | |
45 | ||
46 | #define IEEE80211_PROBE_DELAY (HZ / 33) | |
47 | #define IEEE80211_CHANNEL_TIME (HZ / 33) | |
48 | #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5) | |
49 | #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ) | |
50 | #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ) | |
51 | #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ) | |
52 | ||
53 | #define IEEE80211_IBSS_MAX_STA_ENTRIES 128 | |
54 | ||
55 | ||
56 | #define IEEE80211_FC(type, stype) cpu_to_le16(type | stype) | |
57 | ||
58 | #define ERP_INFO_USE_PROTECTION BIT(1) | |
59 | ||
9f985b0e RR |
60 | /* mgmt header + 1 byte action code */ |
61 | #define IEEE80211_MIN_ACTION_SIZE (24 + 1) | |
62 | ||
63 | #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002 | |
64 | #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C | |
65 | #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0 | |
66 | ||
07db2183 RR |
67 | /* next values represent the buffer size for A-MPDU frame. |
68 | * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */ | |
69 | #define IEEE80211_MIN_AMPDU_BUF 0x8 | |
70 | #define IEEE80211_MAX_AMPDU_BUF 0x40 | |
71 | ||
f0706e82 JB |
72 | static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst, |
73 | u8 *ssid, size_t ssid_len); | |
74 | static struct ieee80211_sta_bss * | |
cffdd30d JL |
75 | ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel, |
76 | u8 *ssid, u8 ssid_len); | |
f0706e82 JB |
77 | static void ieee80211_rx_bss_put(struct net_device *dev, |
78 | struct ieee80211_sta_bss *bss); | |
79 | static int ieee80211_sta_find_ibss(struct net_device *dev, | |
80 | struct ieee80211_if_sta *ifsta); | |
81 | static int ieee80211_sta_wep_configured(struct net_device *dev); | |
82 | static int ieee80211_sta_start_scan(struct net_device *dev, | |
83 | u8 *ssid, size_t ssid_len); | |
84 | static int ieee80211_sta_config_auth(struct net_device *dev, | |
85 | struct ieee80211_if_sta *ifsta); | |
86 | ||
87 | ||
88 | /* Parsed Information Elements */ | |
89 | struct ieee802_11_elems { | |
5558235c | 90 | /* pointers to IEs */ |
f0706e82 | 91 | u8 *ssid; |
f0706e82 | 92 | u8 *supp_rates; |
f0706e82 | 93 | u8 *fh_params; |
f0706e82 | 94 | u8 *ds_params; |
f0706e82 | 95 | u8 *cf_params; |
f0706e82 | 96 | u8 *tim; |
f0706e82 | 97 | u8 *ibss_params; |
f0706e82 | 98 | u8 *challenge; |
f0706e82 | 99 | u8 *wpa; |
f0706e82 | 100 | u8 *rsn; |
f0706e82 | 101 | u8 *erp_info; |
f0706e82 | 102 | u8 *ext_supp_rates; |
f0706e82 | 103 | u8 *wmm_info; |
f0706e82 | 104 | u8 *wmm_param; |
c7153508 RR |
105 | u8 *ht_cap_elem; |
106 | u8 *ht_info_elem; | |
5558235c JB |
107 | /* length of them, respectively */ |
108 | u8 ssid_len; | |
109 | u8 supp_rates_len; | |
110 | u8 fh_params_len; | |
111 | u8 ds_params_len; | |
112 | u8 cf_params_len; | |
113 | u8 tim_len; | |
114 | u8 ibss_params_len; | |
115 | u8 challenge_len; | |
116 | u8 wpa_len; | |
117 | u8 rsn_len; | |
118 | u8 erp_info_len; | |
119 | u8 ext_supp_rates_len; | |
120 | u8 wmm_info_len; | |
f0706e82 | 121 | u8 wmm_param_len; |
c7153508 RR |
122 | u8 ht_cap_elem_len; |
123 | u8 ht_info_elem_len; | |
f0706e82 JB |
124 | }; |
125 | ||
67a4cce4 JL |
126 | static void ieee802_11_parse_elems(u8 *start, size_t len, |
127 | struct ieee802_11_elems *elems) | |
f0706e82 JB |
128 | { |
129 | size_t left = len; | |
130 | u8 *pos = start; | |
f0706e82 JB |
131 | |
132 | memset(elems, 0, sizeof(*elems)); | |
133 | ||
134 | while (left >= 2) { | |
135 | u8 id, elen; | |
136 | ||
137 | id = *pos++; | |
138 | elen = *pos++; | |
139 | left -= 2; | |
140 | ||
67a4cce4 JL |
141 | if (elen > left) |
142 | return; | |
f0706e82 JB |
143 | |
144 | switch (id) { | |
145 | case WLAN_EID_SSID: | |
146 | elems->ssid = pos; | |
147 | elems->ssid_len = elen; | |
148 | break; | |
149 | case WLAN_EID_SUPP_RATES: | |
150 | elems->supp_rates = pos; | |
151 | elems->supp_rates_len = elen; | |
152 | break; | |
153 | case WLAN_EID_FH_PARAMS: | |
154 | elems->fh_params = pos; | |
155 | elems->fh_params_len = elen; | |
156 | break; | |
157 | case WLAN_EID_DS_PARAMS: | |
158 | elems->ds_params = pos; | |
159 | elems->ds_params_len = elen; | |
160 | break; | |
161 | case WLAN_EID_CF_PARAMS: | |
162 | elems->cf_params = pos; | |
163 | elems->cf_params_len = elen; | |
164 | break; | |
165 | case WLAN_EID_TIM: | |
166 | elems->tim = pos; | |
167 | elems->tim_len = elen; | |
168 | break; | |
169 | case WLAN_EID_IBSS_PARAMS: | |
170 | elems->ibss_params = pos; | |
171 | elems->ibss_params_len = elen; | |
172 | break; | |
173 | case WLAN_EID_CHALLENGE: | |
174 | elems->challenge = pos; | |
175 | elems->challenge_len = elen; | |
176 | break; | |
177 | case WLAN_EID_WPA: | |
178 | if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && | |
179 | pos[2] == 0xf2) { | |
180 | /* Microsoft OUI (00:50:F2) */ | |
181 | if (pos[3] == 1) { | |
182 | /* OUI Type 1 - WPA IE */ | |
183 | elems->wpa = pos; | |
184 | elems->wpa_len = elen; | |
185 | } else if (elen >= 5 && pos[3] == 2) { | |
186 | if (pos[4] == 0) { | |
187 | elems->wmm_info = pos; | |
188 | elems->wmm_info_len = elen; | |
189 | } else if (pos[4] == 1) { | |
190 | elems->wmm_param = pos; | |
191 | elems->wmm_param_len = elen; | |
192 | } | |
193 | } | |
194 | } | |
195 | break; | |
196 | case WLAN_EID_RSN: | |
197 | elems->rsn = pos; | |
198 | elems->rsn_len = elen; | |
199 | break; | |
200 | case WLAN_EID_ERP_INFO: | |
201 | elems->erp_info = pos; | |
202 | elems->erp_info_len = elen; | |
203 | break; | |
204 | case WLAN_EID_EXT_SUPP_RATES: | |
205 | elems->ext_supp_rates = pos; | |
206 | elems->ext_supp_rates_len = elen; | |
207 | break; | |
c7153508 RR |
208 | case WLAN_EID_HT_CAPABILITY: |
209 | elems->ht_cap_elem = pos; | |
210 | elems->ht_cap_elem_len = elen; | |
211 | break; | |
212 | case WLAN_EID_HT_EXTRA_INFO: | |
213 | elems->ht_info_elem = pos; | |
214 | elems->ht_info_elem_len = elen; | |
215 | break; | |
f0706e82 | 216 | default: |
f0706e82 JB |
217 | break; |
218 | } | |
219 | ||
220 | left -= elen; | |
221 | pos += elen; | |
222 | } | |
f0706e82 JB |
223 | } |
224 | ||
225 | ||
f0706e82 JB |
226 | static int ecw2cw(int ecw) |
227 | { | |
228 | int cw = 1; | |
229 | while (ecw > 0) { | |
230 | cw <<= 1; | |
231 | ecw--; | |
232 | } | |
233 | return cw - 1; | |
234 | } | |
235 | ||
f0706e82 JB |
236 | static void ieee80211_sta_wmm_params(struct net_device *dev, |
237 | struct ieee80211_if_sta *ifsta, | |
238 | u8 *wmm_param, size_t wmm_param_len) | |
239 | { | |
240 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
241 | struct ieee80211_tx_queue_params params; | |
242 | size_t left; | |
243 | int count; | |
244 | u8 *pos; | |
245 | ||
246 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) | |
247 | return; | |
248 | count = wmm_param[6] & 0x0f; | |
249 | if (count == ifsta->wmm_last_param_set) | |
250 | return; | |
251 | ifsta->wmm_last_param_set = count; | |
252 | ||
253 | pos = wmm_param + 8; | |
254 | left = wmm_param_len - 8; | |
255 | ||
256 | memset(¶ms, 0, sizeof(params)); | |
257 | ||
258 | if (!local->ops->conf_tx) | |
259 | return; | |
260 | ||
261 | local->wmm_acm = 0; | |
262 | for (; left >= 4; left -= 4, pos += 4) { | |
263 | int aci = (pos[0] >> 5) & 0x03; | |
264 | int acm = (pos[0] >> 4) & 0x01; | |
265 | int queue; | |
266 | ||
267 | switch (aci) { | |
268 | case 1: | |
269 | queue = IEEE80211_TX_QUEUE_DATA3; | |
270 | if (acm) { | |
271 | local->wmm_acm |= BIT(0) | BIT(3); | |
272 | } | |
273 | break; | |
274 | case 2: | |
275 | queue = IEEE80211_TX_QUEUE_DATA1; | |
276 | if (acm) { | |
277 | local->wmm_acm |= BIT(4) | BIT(5); | |
278 | } | |
279 | break; | |
280 | case 3: | |
281 | queue = IEEE80211_TX_QUEUE_DATA0; | |
282 | if (acm) { | |
283 | local->wmm_acm |= BIT(6) | BIT(7); | |
284 | } | |
285 | break; | |
286 | case 0: | |
287 | default: | |
288 | queue = IEEE80211_TX_QUEUE_DATA2; | |
289 | if (acm) { | |
290 | local->wmm_acm |= BIT(1) | BIT(2); | |
291 | } | |
292 | break; | |
293 | } | |
294 | ||
295 | params.aifs = pos[0] & 0x0f; | |
296 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); | |
297 | params.cw_min = ecw2cw(pos[1] & 0x0f); | |
298 | /* TXOP is in units of 32 usec; burst_time in 0.1 ms */ | |
299 | params.burst_time = (pos[2] | (pos[3] << 8)) * 32 / 100; | |
300 | printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d " | |
301 | "cWmin=%d cWmax=%d burst=%d\n", | |
302 | dev->name, queue, aci, acm, params.aifs, params.cw_min, | |
303 | params.cw_max, params.burst_time); | |
304 | /* TODO: handle ACM (block TX, fallback to next lowest allowed | |
305 | * AC for now) */ | |
306 | if (local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) { | |
307 | printk(KERN_DEBUG "%s: failed to set TX queue " | |
308 | "parameters for queue %d\n", dev->name, queue); | |
309 | } | |
310 | } | |
311 | } | |
312 | ||
313 | ||
5628221c DD |
314 | static void ieee80211_handle_erp_ie(struct net_device *dev, u8 erp_value) |
315 | { | |
5628221c DD |
316 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
317 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
318 | int use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0; | |
7e9ed188 | 319 | int preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0; |
d9430a32 | 320 | u8 changes = 0; |
0795af57 | 321 | DECLARE_MAC_BUF(mac); |
5628221c | 322 | |
13262ffd | 323 | if (use_protection != !!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION)) { |
5628221c DD |
324 | if (net_ratelimit()) { |
325 | printk(KERN_DEBUG "%s: CTS protection %s (BSSID=" | |
0795af57 | 326 | "%s)\n", |
5628221c DD |
327 | dev->name, |
328 | use_protection ? "enabled" : "disabled", | |
0795af57 | 329 | print_mac(mac, ifsta->bssid)); |
5628221c | 330 | } |
13262ffd JS |
331 | if (use_protection) |
332 | sdata->flags |= IEEE80211_SDATA_USE_PROTECTION; | |
333 | else | |
334 | sdata->flags &= ~IEEE80211_SDATA_USE_PROTECTION; | |
d9430a32 | 335 | changes |= IEEE80211_ERP_CHANGE_PROTECTION; |
5628221c | 336 | } |
7e9ed188 | 337 | |
13262ffd | 338 | if (preamble_mode != !(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE)) { |
7e9ed188 DD |
339 | if (net_ratelimit()) { |
340 | printk(KERN_DEBUG "%s: switched to %s barker preamble" | |
0795af57 | 341 | " (BSSID=%s)\n", |
7e9ed188 DD |
342 | dev->name, |
343 | (preamble_mode == WLAN_ERP_PREAMBLE_SHORT) ? | |
344 | "short" : "long", | |
0795af57 | 345 | print_mac(mac, ifsta->bssid)); |
7e9ed188 | 346 | } |
13262ffd JS |
347 | if (preamble_mode) |
348 | sdata->flags &= ~IEEE80211_SDATA_SHORT_PREAMBLE; | |
349 | else | |
350 | sdata->flags |= IEEE80211_SDATA_SHORT_PREAMBLE; | |
d9430a32 | 351 | changes |= IEEE80211_ERP_CHANGE_PREAMBLE; |
7e9ed188 | 352 | } |
d9430a32 DD |
353 | |
354 | if (changes) | |
355 | ieee80211_erp_info_change_notify(dev, changes); | |
5628221c DD |
356 | } |
357 | ||
c7153508 RR |
358 | int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie, |
359 | struct ieee80211_ht_info *ht_info) | |
360 | { | |
361 | ||
362 | if (ht_info == NULL) | |
363 | return -EINVAL; | |
364 | ||
365 | memset(ht_info, 0, sizeof(*ht_info)); | |
366 | ||
367 | if (ht_cap_ie) { | |
368 | u8 ampdu_info = ht_cap_ie->ampdu_params_info; | |
369 | ||
370 | ht_info->ht_supported = 1; | |
371 | ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info); | |
372 | ht_info->ampdu_factor = | |
373 | ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR; | |
374 | ht_info->ampdu_density = | |
375 | (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2; | |
376 | memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16); | |
377 | } else | |
378 | ht_info->ht_supported = 0; | |
379 | ||
380 | return 0; | |
381 | } | |
382 | ||
383 | int ieee80211_ht_addt_info_ie_to_ht_bss_info( | |
384 | struct ieee80211_ht_addt_info *ht_add_info_ie, | |
385 | struct ieee80211_ht_bss_info *bss_info) | |
386 | { | |
387 | if (bss_info == NULL) | |
388 | return -EINVAL; | |
389 | ||
390 | memset(bss_info, 0, sizeof(*bss_info)); | |
391 | ||
392 | if (ht_add_info_ie) { | |
393 | u16 op_mode; | |
394 | op_mode = le16_to_cpu(ht_add_info_ie->operation_mode); | |
395 | ||
396 | bss_info->primary_channel = ht_add_info_ie->control_chan; | |
397 | bss_info->bss_cap = ht_add_info_ie->ht_param; | |
398 | bss_info->bss_op_mode = (u8)(op_mode & 0xff); | |
399 | } | |
400 | ||
401 | return 0; | |
402 | } | |
5628221c | 403 | |
f0706e82 JB |
404 | static void ieee80211_sta_send_associnfo(struct net_device *dev, |
405 | struct ieee80211_if_sta *ifsta) | |
406 | { | |
407 | char *buf; | |
408 | size_t len; | |
409 | int i; | |
410 | union iwreq_data wrqu; | |
411 | ||
412 | if (!ifsta->assocreq_ies && !ifsta->assocresp_ies) | |
413 | return; | |
414 | ||
415 | buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len + | |
0ec0b7ac | 416 | ifsta->assocresp_ies_len), GFP_KERNEL); |
f0706e82 JB |
417 | if (!buf) |
418 | return; | |
419 | ||
420 | len = sprintf(buf, "ASSOCINFO("); | |
421 | if (ifsta->assocreq_ies) { | |
422 | len += sprintf(buf + len, "ReqIEs="); | |
423 | for (i = 0; i < ifsta->assocreq_ies_len; i++) { | |
424 | len += sprintf(buf + len, "%02x", | |
425 | ifsta->assocreq_ies[i]); | |
426 | } | |
427 | } | |
428 | if (ifsta->assocresp_ies) { | |
429 | if (ifsta->assocreq_ies) | |
430 | len += sprintf(buf + len, " "); | |
431 | len += sprintf(buf + len, "RespIEs="); | |
432 | for (i = 0; i < ifsta->assocresp_ies_len; i++) { | |
433 | len += sprintf(buf + len, "%02x", | |
434 | ifsta->assocresp_ies[i]); | |
435 | } | |
436 | } | |
437 | len += sprintf(buf + len, ")"); | |
438 | ||
439 | if (len > IW_CUSTOM_MAX) { | |
440 | len = sprintf(buf, "ASSOCRESPIE="); | |
441 | for (i = 0; i < ifsta->assocresp_ies_len; i++) { | |
442 | len += sprintf(buf + len, "%02x", | |
443 | ifsta->assocresp_ies[i]); | |
444 | } | |
445 | } | |
446 | ||
447 | memset(&wrqu, 0, sizeof(wrqu)); | |
448 | wrqu.data.length = len; | |
449 | wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf); | |
450 | ||
451 | kfree(buf); | |
452 | } | |
453 | ||
454 | ||
455 | static void ieee80211_set_associated(struct net_device *dev, | |
d6f2da5b | 456 | struct ieee80211_if_sta *ifsta, |
47f0c502 | 457 | bool assoc) |
f0706e82 | 458 | { |
47f0c502 | 459 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
f0706e82 JB |
460 | union iwreq_data wrqu; |
461 | ||
d6f2da5b | 462 | if (!!(ifsta->flags & IEEE80211_STA_ASSOCIATED) == assoc) |
f0706e82 JB |
463 | return; |
464 | ||
f0706e82 JB |
465 | if (assoc) { |
466 | struct ieee80211_sub_if_data *sdata; | |
5628221c | 467 | struct ieee80211_sta_bss *bss; |
d6f2da5b JS |
468 | |
469 | ifsta->flags |= IEEE80211_STA_ASSOCIATED; | |
470 | ||
f0706e82 JB |
471 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
472 | if (sdata->type != IEEE80211_IF_TYPE_STA) | |
473 | return; | |
5628221c | 474 | |
65c107ab | 475 | bss = ieee80211_rx_bss_get(dev, ifsta->bssid, |
cffdd30d JL |
476 | local->hw.conf.channel, |
477 | ifsta->ssid, ifsta->ssid_len); | |
5628221c DD |
478 | if (bss) { |
479 | if (bss->has_erp_value) | |
480 | ieee80211_handle_erp_ie(dev, bss->erp_value); | |
481 | ieee80211_rx_bss_put(dev, bss); | |
482 | } | |
483 | ||
f0706e82 | 484 | netif_carrier_on(dev); |
d6f2da5b | 485 | ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET; |
f0706e82 JB |
486 | memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN); |
487 | memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN); | |
488 | ieee80211_sta_send_associnfo(dev, ifsta); | |
489 | } else { | |
d6f2da5b JS |
490 | ifsta->flags &= ~IEEE80211_STA_ASSOCIATED; |
491 | ||
f0706e82 | 492 | netif_carrier_off(dev); |
d9430a32 | 493 | ieee80211_reset_erp_info(dev); |
f0706e82 JB |
494 | memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN); |
495 | } | |
496 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; | |
497 | wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); | |
498 | ifsta->last_probe = jiffies; | |
47f0c502 | 499 | ieee80211_led_assoc(local, assoc); |
f0706e82 JB |
500 | } |
501 | ||
502 | static void ieee80211_set_disassoc(struct net_device *dev, | |
503 | struct ieee80211_if_sta *ifsta, int deauth) | |
504 | { | |
505 | if (deauth) | |
506 | ifsta->auth_tries = 0; | |
507 | ifsta->assoc_tries = 0; | |
508 | ieee80211_set_associated(dev, ifsta, 0); | |
509 | } | |
510 | ||
511 | static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb, | |
512 | int encrypt) | |
513 | { | |
514 | struct ieee80211_sub_if_data *sdata; | |
515 | struct ieee80211_tx_packet_data *pkt_data; | |
516 | ||
517 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
518 | skb->dev = sdata->local->mdev; | |
519 | skb_set_mac_header(skb, 0); | |
520 | skb_set_network_header(skb, 0); | |
521 | skb_set_transport_header(skb, 0); | |
522 | ||
523 | pkt_data = (struct ieee80211_tx_packet_data *) skb->cb; | |
524 | memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data)); | |
525 | pkt_data->ifindex = sdata->dev->ifindex; | |
e8bf9649 JS |
526 | if (!encrypt) |
527 | pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT; | |
f0706e82 JB |
528 | |
529 | dev_queue_xmit(skb); | |
530 | } | |
531 | ||
532 | ||
533 | static void ieee80211_send_auth(struct net_device *dev, | |
534 | struct ieee80211_if_sta *ifsta, | |
535 | int transaction, u8 *extra, size_t extra_len, | |
536 | int encrypt) | |
537 | { | |
538 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
539 | struct sk_buff *skb; | |
540 | struct ieee80211_mgmt *mgmt; | |
541 | ||
542 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
543 | sizeof(*mgmt) + 6 + extra_len); | |
544 | if (!skb) { | |
545 | printk(KERN_DEBUG "%s: failed to allocate buffer for auth " | |
546 | "frame\n", dev->name); | |
547 | return; | |
548 | } | |
549 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
550 | ||
551 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); | |
552 | memset(mgmt, 0, 24 + 6); | |
553 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
554 | IEEE80211_STYPE_AUTH); | |
555 | if (encrypt) | |
556 | mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
557 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
558 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
559 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
560 | mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg); | |
561 | mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); | |
562 | ifsta->auth_transaction = transaction + 1; | |
563 | mgmt->u.auth.status_code = cpu_to_le16(0); | |
564 | if (extra) | |
565 | memcpy(skb_put(skb, extra_len), extra, extra_len); | |
566 | ||
567 | ieee80211_sta_tx(dev, skb, encrypt); | |
568 | } | |
569 | ||
570 | ||
571 | static void ieee80211_authenticate(struct net_device *dev, | |
572 | struct ieee80211_if_sta *ifsta) | |
573 | { | |
0795af57 JP |
574 | DECLARE_MAC_BUF(mac); |
575 | ||
f0706e82 JB |
576 | ifsta->auth_tries++; |
577 | if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0795af57 | 578 | printk(KERN_DEBUG "%s: authentication with AP %s" |
f0706e82 | 579 | " timed out\n", |
0795af57 | 580 | dev->name, print_mac(mac, ifsta->bssid)); |
f0706e82 JB |
581 | ifsta->state = IEEE80211_DISABLED; |
582 | return; | |
583 | } | |
584 | ||
585 | ifsta->state = IEEE80211_AUTHENTICATE; | |
0795af57 JP |
586 | printk(KERN_DEBUG "%s: authenticate with AP %s\n", |
587 | dev->name, print_mac(mac, ifsta->bssid)); | |
f0706e82 JB |
588 | |
589 | ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0); | |
590 | ||
591 | mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT); | |
592 | } | |
593 | ||
594 | ||
595 | static void ieee80211_send_assoc(struct net_device *dev, | |
596 | struct ieee80211_if_sta *ifsta) | |
597 | { | |
598 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
599 | struct ieee80211_hw_mode *mode; | |
600 | struct sk_buff *skb; | |
601 | struct ieee80211_mgmt *mgmt; | |
602 | u8 *pos, *ies; | |
603 | int i, len; | |
604 | u16 capab; | |
605 | struct ieee80211_sta_bss *bss; | |
606 | int wmm = 0; | |
607 | ||
608 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
609 | sizeof(*mgmt) + 200 + ifsta->extra_ie_len + | |
610 | ifsta->ssid_len); | |
611 | if (!skb) { | |
612 | printk(KERN_DEBUG "%s: failed to allocate buffer for assoc " | |
613 | "frame\n", dev->name); | |
614 | return; | |
615 | } | |
616 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
617 | ||
618 | mode = local->oper_hw_mode; | |
619 | capab = ifsta->capab; | |
620 | if (mode->mode == MODE_IEEE80211G) { | |
621 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME | | |
622 | WLAN_CAPABILITY_SHORT_PREAMBLE; | |
623 | } | |
cffdd30d JL |
624 | bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel, |
625 | ifsta->ssid, ifsta->ssid_len); | |
f0706e82 JB |
626 | if (bss) { |
627 | if (bss->capability & WLAN_CAPABILITY_PRIVACY) | |
628 | capab |= WLAN_CAPABILITY_PRIVACY; | |
629 | if (bss->wmm_ie) { | |
630 | wmm = 1; | |
631 | } | |
632 | ieee80211_rx_bss_put(dev, bss); | |
633 | } | |
634 | ||
635 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
636 | memset(mgmt, 0, 24); | |
637 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
638 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
639 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
640 | ||
d6f2da5b | 641 | if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) { |
f0706e82 JB |
642 | skb_put(skb, 10); |
643 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
644 | IEEE80211_STYPE_REASSOC_REQ); | |
645 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); | |
646 | mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1); | |
647 | memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid, | |
648 | ETH_ALEN); | |
649 | } else { | |
650 | skb_put(skb, 4); | |
651 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
652 | IEEE80211_STYPE_ASSOC_REQ); | |
653 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); | |
654 | mgmt->u.assoc_req.listen_interval = cpu_to_le16(1); | |
655 | } | |
656 | ||
657 | /* SSID */ | |
658 | ies = pos = skb_put(skb, 2 + ifsta->ssid_len); | |
659 | *pos++ = WLAN_EID_SSID; | |
660 | *pos++ = ifsta->ssid_len; | |
661 | memcpy(pos, ifsta->ssid, ifsta->ssid_len); | |
662 | ||
663 | len = mode->num_rates; | |
664 | if (len > 8) | |
665 | len = 8; | |
666 | pos = skb_put(skb, len + 2); | |
667 | *pos++ = WLAN_EID_SUPP_RATES; | |
668 | *pos++ = len; | |
669 | for (i = 0; i < len; i++) { | |
670 | int rate = mode->rates[i].rate; | |
f0706e82 JB |
671 | *pos++ = (u8) (rate / 5); |
672 | } | |
673 | ||
674 | if (mode->num_rates > len) { | |
675 | pos = skb_put(skb, mode->num_rates - len + 2); | |
676 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
677 | *pos++ = mode->num_rates - len; | |
678 | for (i = len; i < mode->num_rates; i++) { | |
679 | int rate = mode->rates[i].rate; | |
f0706e82 JB |
680 | *pos++ = (u8) (rate / 5); |
681 | } | |
682 | } | |
683 | ||
684 | if (ifsta->extra_ie) { | |
685 | pos = skb_put(skb, ifsta->extra_ie_len); | |
686 | memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len); | |
687 | } | |
688 | ||
d6f2da5b | 689 | if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) { |
f0706e82 JB |
690 | pos = skb_put(skb, 9); |
691 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
692 | *pos++ = 7; /* len */ | |
693 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ | |
694 | *pos++ = 0x50; | |
695 | *pos++ = 0xf2; | |
696 | *pos++ = 2; /* WME */ | |
697 | *pos++ = 0; /* WME info */ | |
698 | *pos++ = 1; /* WME ver */ | |
699 | *pos++ = 0; | |
700 | } | |
c7153508 RR |
701 | /* wmm support is a must to HT */ |
702 | if (wmm && mode->ht_info.ht_supported) { | |
703 | __le16 tmp = cpu_to_le16(mode->ht_info.cap); | |
704 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2); | |
705 | *pos++ = WLAN_EID_HT_CAPABILITY; | |
706 | *pos++ = sizeof(struct ieee80211_ht_cap); | |
707 | memset(pos, 0, sizeof(struct ieee80211_ht_cap)); | |
708 | memcpy(pos, &tmp, sizeof(u16)); | |
709 | pos += sizeof(u16); | |
710 | *pos++ = (mode->ht_info.ampdu_factor | | |
711 | (mode->ht_info.ampdu_density << 2)); | |
712 | memcpy(pos, mode->ht_info.supp_mcs_set, 16); | |
713 | } | |
f0706e82 JB |
714 | |
715 | kfree(ifsta->assocreq_ies); | |
716 | ifsta->assocreq_ies_len = (skb->data + skb->len) - ies; | |
0ec0b7ac | 717 | ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL); |
f0706e82 JB |
718 | if (ifsta->assocreq_ies) |
719 | memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len); | |
720 | ||
721 | ieee80211_sta_tx(dev, skb, 0); | |
722 | } | |
723 | ||
724 | ||
725 | static void ieee80211_send_deauth(struct net_device *dev, | |
726 | struct ieee80211_if_sta *ifsta, u16 reason) | |
727 | { | |
728 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
729 | struct sk_buff *skb; | |
730 | struct ieee80211_mgmt *mgmt; | |
731 | ||
732 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); | |
733 | if (!skb) { | |
734 | printk(KERN_DEBUG "%s: failed to allocate buffer for deauth " | |
735 | "frame\n", dev->name); | |
736 | return; | |
737 | } | |
738 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
739 | ||
740 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
741 | memset(mgmt, 0, 24); | |
742 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
743 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
744 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
745 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
746 | IEEE80211_STYPE_DEAUTH); | |
747 | skb_put(skb, 2); | |
748 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); | |
749 | ||
750 | ieee80211_sta_tx(dev, skb, 0); | |
751 | } | |
752 | ||
753 | ||
754 | static void ieee80211_send_disassoc(struct net_device *dev, | |
755 | struct ieee80211_if_sta *ifsta, u16 reason) | |
756 | { | |
757 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
758 | struct sk_buff *skb; | |
759 | struct ieee80211_mgmt *mgmt; | |
760 | ||
761 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); | |
762 | if (!skb) { | |
763 | printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc " | |
764 | "frame\n", dev->name); | |
765 | return; | |
766 | } | |
767 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
768 | ||
769 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
770 | memset(mgmt, 0, 24); | |
771 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
772 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
773 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
774 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
775 | IEEE80211_STYPE_DISASSOC); | |
776 | skb_put(skb, 2); | |
777 | mgmt->u.disassoc.reason_code = cpu_to_le16(reason); | |
778 | ||
779 | ieee80211_sta_tx(dev, skb, 0); | |
780 | } | |
781 | ||
782 | ||
783 | static int ieee80211_privacy_mismatch(struct net_device *dev, | |
784 | struct ieee80211_if_sta *ifsta) | |
785 | { | |
65c107ab | 786 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
f0706e82 | 787 | struct ieee80211_sta_bss *bss; |
5b98b1f7 JB |
788 | int bss_privacy; |
789 | int wep_privacy; | |
790 | int privacy_invoked; | |
f0706e82 | 791 | |
5b98b1f7 | 792 | if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL)) |
f0706e82 JB |
793 | return 0; |
794 | ||
cffdd30d JL |
795 | bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel, |
796 | ifsta->ssid, ifsta->ssid_len); | |
f0706e82 JB |
797 | if (!bss) |
798 | return 0; | |
799 | ||
5b98b1f7 JB |
800 | bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY); |
801 | wep_privacy = !!ieee80211_sta_wep_configured(dev); | |
802 | privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED); | |
f0706e82 JB |
803 | |
804 | ieee80211_rx_bss_put(dev, bss); | |
805 | ||
5b98b1f7 JB |
806 | if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked)) |
807 | return 0; | |
808 | ||
809 | return 1; | |
f0706e82 JB |
810 | } |
811 | ||
812 | ||
813 | static void ieee80211_associate(struct net_device *dev, | |
814 | struct ieee80211_if_sta *ifsta) | |
815 | { | |
0795af57 JP |
816 | DECLARE_MAC_BUF(mac); |
817 | ||
f0706e82 JB |
818 | ifsta->assoc_tries++; |
819 | if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) { | |
0795af57 | 820 | printk(KERN_DEBUG "%s: association with AP %s" |
f0706e82 | 821 | " timed out\n", |
0795af57 | 822 | dev->name, print_mac(mac, ifsta->bssid)); |
f0706e82 JB |
823 | ifsta->state = IEEE80211_DISABLED; |
824 | return; | |
825 | } | |
826 | ||
827 | ifsta->state = IEEE80211_ASSOCIATE; | |
0795af57 JP |
828 | printk(KERN_DEBUG "%s: associate with AP %s\n", |
829 | dev->name, print_mac(mac, ifsta->bssid)); | |
f0706e82 JB |
830 | if (ieee80211_privacy_mismatch(dev, ifsta)) { |
831 | printk(KERN_DEBUG "%s: mismatch in privacy configuration and " | |
832 | "mixed-cell disabled - abort association\n", dev->name); | |
833 | ifsta->state = IEEE80211_DISABLED; | |
834 | return; | |
835 | } | |
836 | ||
837 | ieee80211_send_assoc(dev, ifsta); | |
838 | ||
839 | mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT); | |
840 | } | |
841 | ||
842 | ||
843 | static void ieee80211_associated(struct net_device *dev, | |
844 | struct ieee80211_if_sta *ifsta) | |
845 | { | |
846 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
847 | struct sta_info *sta; | |
848 | int disassoc; | |
0795af57 | 849 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
850 | |
851 | /* TODO: start monitoring current AP signal quality and number of | |
852 | * missed beacons. Scan other channels every now and then and search | |
853 | * for better APs. */ | |
854 | /* TODO: remove expired BSSes */ | |
855 | ||
856 | ifsta->state = IEEE80211_ASSOCIATED; | |
857 | ||
858 | sta = sta_info_get(local, ifsta->bssid); | |
859 | if (!sta) { | |
0795af57 JP |
860 | printk(KERN_DEBUG "%s: No STA entry for own AP %s\n", |
861 | dev->name, print_mac(mac, ifsta->bssid)); | |
f0706e82 JB |
862 | disassoc = 1; |
863 | } else { | |
864 | disassoc = 0; | |
865 | if (time_after(jiffies, | |
866 | sta->last_rx + IEEE80211_MONITORING_INTERVAL)) { | |
d6f2da5b | 867 | if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) { |
f0706e82 | 868 | printk(KERN_DEBUG "%s: No ProbeResp from " |
0795af57 | 869 | "current AP %s - assume out of " |
f0706e82 | 870 | "range\n", |
0795af57 | 871 | dev->name, print_mac(mac, ifsta->bssid)); |
f0706e82 | 872 | disassoc = 1; |
be8755e1 | 873 | sta_info_free(sta); |
d6f2da5b | 874 | } else |
f0706e82 JB |
875 | ieee80211_send_probe_req(dev, ifsta->bssid, |
876 | local->scan_ssid, | |
877 | local->scan_ssid_len); | |
d6f2da5b | 878 | ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL; |
f0706e82 | 879 | } else { |
d6f2da5b | 880 | ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL; |
f0706e82 JB |
881 | if (time_after(jiffies, ifsta->last_probe + |
882 | IEEE80211_PROBE_INTERVAL)) { | |
883 | ifsta->last_probe = jiffies; | |
884 | ieee80211_send_probe_req(dev, ifsta->bssid, | |
885 | ifsta->ssid, | |
886 | ifsta->ssid_len); | |
887 | } | |
888 | } | |
889 | sta_info_put(sta); | |
890 | } | |
891 | if (disassoc) { | |
2d192d95 MW |
892 | ifsta->state = IEEE80211_DISABLED; |
893 | ieee80211_set_associated(dev, ifsta, 0); | |
f0706e82 JB |
894 | } else { |
895 | mod_timer(&ifsta->timer, jiffies + | |
896 | IEEE80211_MONITORING_INTERVAL); | |
897 | } | |
898 | } | |
899 | ||
900 | ||
901 | static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst, | |
902 | u8 *ssid, size_t ssid_len) | |
903 | { | |
904 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
905 | struct ieee80211_hw_mode *mode; | |
906 | struct sk_buff *skb; | |
907 | struct ieee80211_mgmt *mgmt; | |
908 | u8 *pos, *supp_rates, *esupp_rates = NULL; | |
909 | int i; | |
910 | ||
911 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200); | |
912 | if (!skb) { | |
913 | printk(KERN_DEBUG "%s: failed to allocate buffer for probe " | |
914 | "request\n", dev->name); | |
915 | return; | |
916 | } | |
917 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
918 | ||
919 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
920 | memset(mgmt, 0, 24); | |
921 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
922 | IEEE80211_STYPE_PROBE_REQ); | |
923 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
924 | if (dst) { | |
925 | memcpy(mgmt->da, dst, ETH_ALEN); | |
926 | memcpy(mgmt->bssid, dst, ETH_ALEN); | |
927 | } else { | |
928 | memset(mgmt->da, 0xff, ETH_ALEN); | |
929 | memset(mgmt->bssid, 0xff, ETH_ALEN); | |
930 | } | |
931 | pos = skb_put(skb, 2 + ssid_len); | |
932 | *pos++ = WLAN_EID_SSID; | |
933 | *pos++ = ssid_len; | |
934 | memcpy(pos, ssid, ssid_len); | |
935 | ||
936 | supp_rates = skb_put(skb, 2); | |
937 | supp_rates[0] = WLAN_EID_SUPP_RATES; | |
938 | supp_rates[1] = 0; | |
939 | mode = local->oper_hw_mode; | |
940 | for (i = 0; i < mode->num_rates; i++) { | |
941 | struct ieee80211_rate *rate = &mode->rates[i]; | |
942 | if (!(rate->flags & IEEE80211_RATE_SUPPORTED)) | |
943 | continue; | |
944 | if (esupp_rates) { | |
945 | pos = skb_put(skb, 1); | |
946 | esupp_rates[1]++; | |
947 | } else if (supp_rates[1] == 8) { | |
948 | esupp_rates = skb_put(skb, 3); | |
949 | esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES; | |
950 | esupp_rates[1] = 1; | |
951 | pos = &esupp_rates[2]; | |
952 | } else { | |
953 | pos = skb_put(skb, 1); | |
954 | supp_rates[1]++; | |
955 | } | |
b708e610 | 956 | *pos = rate->rate / 5; |
f0706e82 JB |
957 | } |
958 | ||
959 | ieee80211_sta_tx(dev, skb, 0); | |
960 | } | |
961 | ||
962 | ||
963 | static int ieee80211_sta_wep_configured(struct net_device *dev) | |
964 | { | |
965 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
966 | if (!sdata || !sdata->default_key || | |
8f20fc24 | 967 | sdata->default_key->conf.alg != ALG_WEP) |
f0706e82 JB |
968 | return 0; |
969 | return 1; | |
970 | } | |
971 | ||
972 | ||
973 | static void ieee80211_auth_completed(struct net_device *dev, | |
974 | struct ieee80211_if_sta *ifsta) | |
975 | { | |
976 | printk(KERN_DEBUG "%s: authenticated\n", dev->name); | |
d6f2da5b | 977 | ifsta->flags |= IEEE80211_STA_AUTHENTICATED; |
f0706e82 JB |
978 | ieee80211_associate(dev, ifsta); |
979 | } | |
980 | ||
981 | ||
982 | static void ieee80211_auth_challenge(struct net_device *dev, | |
983 | struct ieee80211_if_sta *ifsta, | |
984 | struct ieee80211_mgmt *mgmt, | |
985 | size_t len) | |
986 | { | |
987 | u8 *pos; | |
988 | struct ieee802_11_elems elems; | |
989 | ||
990 | printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name); | |
991 | pos = mgmt->u.auth.variable; | |
67a4cce4 | 992 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
f0706e82 JB |
993 | if (!elems.challenge) { |
994 | printk(KERN_DEBUG "%s: no challenge IE in shared key auth " | |
995 | "frame\n", dev->name); | |
996 | return; | |
997 | } | |
998 | ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2, | |
999 | elems.challenge_len + 2, 1); | |
1000 | } | |
1001 | ||
9f985b0e RR |
1002 | static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid, |
1003 | u8 dialog_token, u16 status, u16 policy, | |
1004 | u16 buf_size, u16 timeout) | |
1005 | { | |
1006 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1007 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
1008 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1009 | struct sk_buff *skb; | |
1010 | struct ieee80211_mgmt *mgmt; | |
1011 | u16 capab; | |
1012 | ||
07db2183 RR |
1013 | skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 + |
1014 | sizeof(mgmt->u.action.u.addba_resp)); | |
9f985b0e RR |
1015 | if (!skb) { |
1016 | printk(KERN_DEBUG "%s: failed to allocate buffer " | |
1017 | "for addba resp frame\n", dev->name); | |
1018 | return; | |
1019 | } | |
1020 | ||
1021 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1022 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
1023 | memset(mgmt, 0, 24); | |
1024 | memcpy(mgmt->da, da, ETH_ALEN); | |
1025 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
1026 | if (sdata->type == IEEE80211_IF_TYPE_AP) | |
1027 | memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN); | |
1028 | else | |
1029 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
1030 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
1031 | IEEE80211_STYPE_ACTION); | |
1032 | ||
1033 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp)); | |
1034 | mgmt->u.action.category = WLAN_CATEGORY_BACK; | |
1035 | mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP; | |
1036 | mgmt->u.action.u.addba_resp.dialog_token = dialog_token; | |
1037 | ||
1038 | capab = (u16)(policy << 1); /* bit 1 aggregation policy */ | |
1039 | capab |= (u16)(tid << 2); /* bit 5:2 TID number */ | |
1040 | capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */ | |
1041 | ||
1042 | mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab); | |
1043 | mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout); | |
1044 | mgmt->u.action.u.addba_resp.status = cpu_to_le16(status); | |
1045 | ||
1046 | ieee80211_sta_tx(dev, skb, 0); | |
1047 | ||
1048 | return; | |
1049 | } | |
1050 | ||
1051 | static void ieee80211_sta_process_addba_request(struct net_device *dev, | |
1052 | struct ieee80211_mgmt *mgmt, | |
1053 | size_t len) | |
1054 | { | |
1055 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
07db2183 RR |
1056 | struct ieee80211_hw *hw = &local->hw; |
1057 | struct ieee80211_conf *conf = &hw->conf; | |
9f985b0e | 1058 | struct sta_info *sta; |
07db2183 RR |
1059 | struct tid_ampdu_rx *tid_agg_rx; |
1060 | u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status; | |
9f985b0e | 1061 | u8 dialog_token; |
07db2183 RR |
1062 | int ret = -EOPNOTSUPP; |
1063 | DECLARE_MAC_BUF(mac); | |
9f985b0e RR |
1064 | |
1065 | sta = sta_info_get(local, mgmt->sa); | |
1066 | if (!sta) | |
1067 | return; | |
1068 | ||
1069 | /* extract session parameters from addba request frame */ | |
1070 | dialog_token = mgmt->u.action.u.addba_req.dialog_token; | |
1071 | timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout); | |
07db2183 RR |
1072 | start_seq_num = |
1073 | le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4; | |
9f985b0e RR |
1074 | |
1075 | capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab); | |
1076 | ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1; | |
1077 | tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2; | |
1078 | buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6; | |
1079 | ||
9f985b0e RR |
1080 | status = WLAN_STATUS_REQUEST_DECLINED; |
1081 | ||
07db2183 RR |
1082 | /* sanity check for incoming parameters: |
1083 | * check if configuration can support the BA policy | |
1084 | * and if buffer size does not exceeds max value */ | |
1085 | if (((ba_policy != 1) | |
1086 | && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA))) | |
1087 | || (buf_size > IEEE80211_MAX_AMPDU_BUF)) { | |
1088 | status = WLAN_STATUS_INVALID_QOS_PARAM; | |
1089 | #ifdef CONFIG_MAC80211_HT_DEBUG | |
1090 | if (net_ratelimit()) | |
1091 | printk(KERN_DEBUG "Block Ack Req with bad params from " | |
1092 | "%s on tid %u. policy %d, buffer size %d\n", | |
1093 | print_mac(mac, mgmt->sa), tid, ba_policy, | |
1094 | buf_size); | |
1095 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1096 | goto end_no_lock; | |
1097 | } | |
1098 | /* determine default buffer size */ | |
1099 | if (buf_size == 0) { | |
1100 | struct ieee80211_hw_mode *mode = conf->mode; | |
1101 | buf_size = IEEE80211_MIN_AMPDU_BUF; | |
1102 | buf_size = buf_size << mode->ht_info.ampdu_factor; | |
1103 | } | |
1104 | ||
1105 | tid_agg_rx = &sta->ampdu_mlme.tid_rx[tid]; | |
1106 | ||
1107 | /* examine state machine */ | |
1108 | spin_lock_bh(&sta->ampdu_mlme.ampdu_rx); | |
1109 | ||
1110 | if (tid_agg_rx->state != HT_AGG_STATE_IDLE) { | |
1111 | #ifdef CONFIG_MAC80211_HT_DEBUG | |
1112 | if (net_ratelimit()) | |
1113 | printk(KERN_DEBUG "unexpected Block Ack Req from " | |
1114 | "%s on tid %u\n", | |
1115 | print_mac(mac, mgmt->sa), tid); | |
1116 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1117 | goto end; | |
1118 | } | |
1119 | ||
1120 | /* prepare reordering buffer */ | |
1121 | tid_agg_rx->reorder_buf = | |
1122 | kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC); | |
1123 | if ((!tid_agg_rx->reorder_buf) && net_ratelimit()) { | |
1124 | printk(KERN_ERR "can not allocate reordering buffer " | |
1125 | "to tid %d\n", tid); | |
1126 | goto end; | |
1127 | } | |
1128 | memset(tid_agg_rx->reorder_buf, 0, | |
1129 | buf_size * sizeof(struct sk_buf *)); | |
1130 | ||
1131 | if (local->ops->ampdu_action) | |
1132 | ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START, | |
1133 | sta->addr, tid, start_seq_num); | |
1134 | #ifdef CONFIG_MAC80211_HT_DEBUG | |
1135 | printk(KERN_DEBUG "Rx A-MPDU on tid %d result %d", tid, ret); | |
1136 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1137 | ||
1138 | if (ret) { | |
1139 | kfree(tid_agg_rx->reorder_buf); | |
1140 | goto end; | |
1141 | } | |
1142 | ||
1143 | /* change state and send addba resp */ | |
1144 | tid_agg_rx->state = HT_AGG_STATE_OPERATIONAL; | |
1145 | tid_agg_rx->dialog_token = dialog_token; | |
1146 | tid_agg_rx->ssn = start_seq_num; | |
1147 | tid_agg_rx->head_seq_num = start_seq_num; | |
1148 | tid_agg_rx->buf_size = buf_size; | |
1149 | tid_agg_rx->timeout = timeout; | |
1150 | tid_agg_rx->stored_mpdu_num = 0; | |
1151 | status = WLAN_STATUS_SUCCESS; | |
1152 | end: | |
1153 | spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx); | |
1154 | ||
1155 | end_no_lock: | |
9f985b0e RR |
1156 | ieee80211_send_addba_resp(sta->dev, sta->addr, tid, dialog_token, |
1157 | status, 1, buf_size, timeout); | |
1158 | sta_info_put(sta); | |
1159 | } | |
f0706e82 | 1160 | |
07db2183 RR |
1161 | void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid, |
1162 | u16 initiator, u16 reason_code) | |
1163 | { | |
1164 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1165 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1166 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
1167 | struct sk_buff *skb; | |
1168 | struct ieee80211_mgmt *mgmt; | |
1169 | u16 params; | |
1170 | ||
1171 | skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 + | |
1172 | sizeof(mgmt->u.action.u.delba)); | |
1173 | ||
1174 | if (!skb) { | |
1175 | printk(KERN_ERR "%s: failed to allocate buffer " | |
1176 | "for delba frame\n", dev->name); | |
1177 | return; | |
1178 | } | |
1179 | ||
1180 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1181 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
1182 | memset(mgmt, 0, 24); | |
1183 | memcpy(mgmt->da, da, ETH_ALEN); | |
1184 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
1185 | if (sdata->type == IEEE80211_IF_TYPE_AP) | |
1186 | memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN); | |
1187 | else | |
1188 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
1189 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
1190 | IEEE80211_STYPE_ACTION); | |
1191 | ||
1192 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba)); | |
1193 | ||
1194 | mgmt->u.action.category = WLAN_CATEGORY_BACK; | |
1195 | mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA; | |
1196 | params = (u16)(initiator << 11); /* bit 11 initiator */ | |
1197 | params |= (u16)(tid << 12); /* bit 15:12 TID number */ | |
1198 | ||
1199 | mgmt->u.action.u.delba.params = cpu_to_le16(params); | |
1200 | mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code); | |
1201 | ||
1202 | ieee80211_sta_tx(dev, skb, 0); | |
1203 | } | |
1204 | ||
1205 | void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid, | |
1206 | u16 initiator, u16 reason) | |
1207 | { | |
1208 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1209 | struct ieee80211_hw *hw = &local->hw; | |
1210 | struct sta_info *sta; | |
b580781e | 1211 | int ret, i; |
07db2183 RR |
1212 | |
1213 | sta = sta_info_get(local, ra); | |
1214 | if (!sta) | |
1215 | return; | |
1216 | ||
1217 | /* check if TID is in operational state */ | |
1218 | spin_lock_bh(&sta->ampdu_mlme.ampdu_rx); | |
1219 | if (sta->ampdu_mlme.tid_rx[tid].state | |
1220 | != HT_AGG_STATE_OPERATIONAL) { | |
1221 | spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx); | |
1222 | if (net_ratelimit()) | |
1223 | printk(KERN_DEBUG "rx BA session requested to stop on " | |
1224 | "inactive tid %d\n", tid); | |
1225 | sta_info_put(sta); | |
1226 | return; | |
1227 | } | |
1228 | sta->ampdu_mlme.tid_rx[tid].state = | |
1229 | HT_AGG_STATE_REQ_STOP_BA_MSK | | |
1230 | (initiator << HT_AGG_STATE_INITIATOR_SHIFT); | |
1231 | spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx); | |
1232 | ||
1233 | /* stop HW Rx aggregation. ampdu_action existence | |
1234 | * already verified in session init so we add the BUG_ON */ | |
1235 | BUG_ON(!local->ops->ampdu_action); | |
1236 | ||
1237 | ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP, | |
1238 | ra, tid, EINVAL); | |
1239 | if (ret) | |
1240 | printk(KERN_DEBUG "HW problem - can not stop rx " | |
1241 | "aggergation for tid %d\n", tid); | |
1242 | ||
1243 | /* shutdown timer has not expired */ | |
1244 | if (initiator != WLAN_BACK_TIMER) | |
1245 | del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]. | |
1246 | session_timer); | |
1247 | ||
1248 | /* check if this is a self generated aggregation halt */ | |
1249 | if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER) | |
1250 | ieee80211_send_delba(dev, ra, tid, 0, reason); | |
1251 | ||
1252 | /* free the reordering buffer */ | |
b580781e RR |
1253 | for (i = 0; i < sta->ampdu_mlme.tid_rx[tid].buf_size; i++) { |
1254 | if (sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]) { | |
1255 | /* release the reordered frames */ | |
1256 | dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]); | |
1257 | sta->ampdu_mlme.tid_rx[tid].stored_mpdu_num--; | |
1258 | sta->ampdu_mlme.tid_rx[tid].reorder_buf[i] = NULL; | |
1259 | } | |
1260 | } | |
07db2183 RR |
1261 | kfree(sta->ampdu_mlme.tid_rx[tid].reorder_buf); |
1262 | ||
1263 | sta->ampdu_mlme.tid_rx[tid].state = HT_AGG_STATE_IDLE; | |
1264 | sta_info_put(sta); | |
1265 | } | |
1266 | ||
1267 | /* | |
1268 | * After receiving Block Ack Request (BAR) we activated a | |
1269 | * timer after each frame arrives from the originator. | |
1270 | * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed. | |
1271 | */ | |
1272 | void sta_rx_agg_session_timer_expired(unsigned long data) | |
1273 | { | |
1274 | /* not an elegant detour, but there is no choice as the timer passes | |
1275 | * only one argument, and verious sta_info are needed here, so init | |
1276 | * flow in sta_info_add gives the TID as data, while the timer_to_id | |
1277 | * array gives the sta through container_of */ | |
1278 | u8 *ptid = (u8 *)data; | |
1279 | u8 *timer_to_id = ptid - *ptid; | |
1280 | struct sta_info *sta = container_of(timer_to_id, struct sta_info, | |
1281 | timer_to_tid[0]); | |
1282 | ||
1283 | printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid); | |
1284 | ieee80211_sta_stop_rx_ba_session(sta->dev, sta->addr, (u16)*ptid, | |
1285 | WLAN_BACK_TIMER, | |
1286 | WLAN_REASON_QSTA_TIMEOUT); | |
1287 | } | |
1288 | ||
1289 | ||
f0706e82 JB |
1290 | static void ieee80211_rx_mgmt_auth(struct net_device *dev, |
1291 | struct ieee80211_if_sta *ifsta, | |
1292 | struct ieee80211_mgmt *mgmt, | |
1293 | size_t len) | |
1294 | { | |
1295 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1296 | u16 auth_alg, auth_transaction, status_code; | |
0795af57 | 1297 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
1298 | |
1299 | if (ifsta->state != IEEE80211_AUTHENTICATE && | |
1300 | sdata->type != IEEE80211_IF_TYPE_IBSS) { | |
1301 | printk(KERN_DEBUG "%s: authentication frame received from " | |
0795af57 JP |
1302 | "%s, but not in authenticate state - ignored\n", |
1303 | dev->name, print_mac(mac, mgmt->sa)); | |
f0706e82 JB |
1304 | return; |
1305 | } | |
1306 | ||
1307 | if (len < 24 + 6) { | |
1308 | printk(KERN_DEBUG "%s: too short (%zd) authentication frame " | |
0795af57 JP |
1309 | "received from %s - ignored\n", |
1310 | dev->name, len, print_mac(mac, mgmt->sa)); | |
f0706e82 JB |
1311 | return; |
1312 | } | |
1313 | ||
1314 | if (sdata->type != IEEE80211_IF_TYPE_IBSS && | |
1315 | memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) { | |
1316 | printk(KERN_DEBUG "%s: authentication frame received from " | |
0795af57 JP |
1317 | "unknown AP (SA=%s BSSID=%s) - " |
1318 | "ignored\n", dev->name, print_mac(mac, mgmt->sa), | |
1319 | print_mac(mac, mgmt->bssid)); | |
f0706e82 JB |
1320 | return; |
1321 | } | |
1322 | ||
1323 | if (sdata->type != IEEE80211_IF_TYPE_IBSS && | |
1324 | memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) { | |
1325 | printk(KERN_DEBUG "%s: authentication frame received from " | |
0795af57 JP |
1326 | "unknown BSSID (SA=%s BSSID=%s) - " |
1327 | "ignored\n", dev->name, print_mac(mac, mgmt->sa), | |
1328 | print_mac(mac, mgmt->bssid)); | |
f0706e82 JB |
1329 | return; |
1330 | } | |
1331 | ||
1332 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
1333 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
1334 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
1335 | ||
0795af57 | 1336 | printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d " |
f0706e82 | 1337 | "transaction=%d status=%d)\n", |
0795af57 | 1338 | dev->name, print_mac(mac, mgmt->sa), auth_alg, |
f0706e82 JB |
1339 | auth_transaction, status_code); |
1340 | ||
1341 | if (sdata->type == IEEE80211_IF_TYPE_IBSS) { | |
1342 | /* IEEE 802.11 standard does not require authentication in IBSS | |
1343 | * networks and most implementations do not seem to use it. | |
1344 | * However, try to reply to authentication attempts if someone | |
1345 | * has actually implemented this. | |
1346 | * TODO: Could implement shared key authentication. */ | |
1347 | if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) { | |
1348 | printk(KERN_DEBUG "%s: unexpected IBSS authentication " | |
1349 | "frame (alg=%d transaction=%d)\n", | |
1350 | dev->name, auth_alg, auth_transaction); | |
1351 | return; | |
1352 | } | |
1353 | ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0); | |
1354 | } | |
1355 | ||
1356 | if (auth_alg != ifsta->auth_alg || | |
1357 | auth_transaction != ifsta->auth_transaction) { | |
1358 | printk(KERN_DEBUG "%s: unexpected authentication frame " | |
1359 | "(alg=%d transaction=%d)\n", | |
1360 | dev->name, auth_alg, auth_transaction); | |
1361 | return; | |
1362 | } | |
1363 | ||
1364 | if (status_code != WLAN_STATUS_SUCCESS) { | |
1365 | printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d " | |
1366 | "code=%d)\n", dev->name, ifsta->auth_alg, status_code); | |
1367 | if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) { | |
1368 | u8 algs[3]; | |
1369 | const int num_algs = ARRAY_SIZE(algs); | |
1370 | int i, pos; | |
1371 | algs[0] = algs[1] = algs[2] = 0xff; | |
1372 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
1373 | algs[0] = WLAN_AUTH_OPEN; | |
1374 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
1375 | algs[1] = WLAN_AUTH_SHARED_KEY; | |
1376 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
1377 | algs[2] = WLAN_AUTH_LEAP; | |
1378 | if (ifsta->auth_alg == WLAN_AUTH_OPEN) | |
1379 | pos = 0; | |
1380 | else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY) | |
1381 | pos = 1; | |
1382 | else | |
1383 | pos = 2; | |
1384 | for (i = 0; i < num_algs; i++) { | |
1385 | pos++; | |
1386 | if (pos >= num_algs) | |
1387 | pos = 0; | |
1388 | if (algs[pos] == ifsta->auth_alg || | |
1389 | algs[pos] == 0xff) | |
1390 | continue; | |
1391 | if (algs[pos] == WLAN_AUTH_SHARED_KEY && | |
1392 | !ieee80211_sta_wep_configured(dev)) | |
1393 | continue; | |
1394 | ifsta->auth_alg = algs[pos]; | |
1395 | printk(KERN_DEBUG "%s: set auth_alg=%d for " | |
1396 | "next try\n", | |
1397 | dev->name, ifsta->auth_alg); | |
1398 | break; | |
1399 | } | |
1400 | } | |
1401 | return; | |
1402 | } | |
1403 | ||
1404 | switch (ifsta->auth_alg) { | |
1405 | case WLAN_AUTH_OPEN: | |
1406 | case WLAN_AUTH_LEAP: | |
1407 | ieee80211_auth_completed(dev, ifsta); | |
1408 | break; | |
1409 | case WLAN_AUTH_SHARED_KEY: | |
1410 | if (ifsta->auth_transaction == 4) | |
1411 | ieee80211_auth_completed(dev, ifsta); | |
1412 | else | |
1413 | ieee80211_auth_challenge(dev, ifsta, mgmt, len); | |
1414 | break; | |
1415 | } | |
1416 | } | |
1417 | ||
1418 | ||
1419 | static void ieee80211_rx_mgmt_deauth(struct net_device *dev, | |
1420 | struct ieee80211_if_sta *ifsta, | |
1421 | struct ieee80211_mgmt *mgmt, | |
1422 | size_t len) | |
1423 | { | |
1424 | u16 reason_code; | |
0795af57 | 1425 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
1426 | |
1427 | if (len < 24 + 2) { | |
1428 | printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame " | |
0795af57 JP |
1429 | "received from %s - ignored\n", |
1430 | dev->name, len, print_mac(mac, mgmt->sa)); | |
f0706e82 JB |
1431 | return; |
1432 | } | |
1433 | ||
1434 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) { | |
1435 | printk(KERN_DEBUG "%s: deauthentication frame received from " | |
0795af57 JP |
1436 | "unknown AP (SA=%s BSSID=%s) - " |
1437 | "ignored\n", dev->name, print_mac(mac, mgmt->sa), | |
1438 | print_mac(mac, mgmt->bssid)); | |
f0706e82 JB |
1439 | return; |
1440 | } | |
1441 | ||
1442 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
1443 | ||
0795af57 | 1444 | printk(KERN_DEBUG "%s: RX deauthentication from %s" |
f0706e82 | 1445 | " (reason=%d)\n", |
0795af57 | 1446 | dev->name, print_mac(mac, mgmt->sa), reason_code); |
f0706e82 | 1447 | |
d6f2da5b | 1448 | if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) { |
f0706e82 JB |
1449 | printk(KERN_DEBUG "%s: deauthenticated\n", dev->name); |
1450 | } | |
1451 | ||
1452 | if (ifsta->state == IEEE80211_AUTHENTICATE || | |
1453 | ifsta->state == IEEE80211_ASSOCIATE || | |
1454 | ifsta->state == IEEE80211_ASSOCIATED) { | |
1455 | ifsta->state = IEEE80211_AUTHENTICATE; | |
1456 | mod_timer(&ifsta->timer, jiffies + | |
1457 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1458 | } | |
1459 | ||
1460 | ieee80211_set_disassoc(dev, ifsta, 1); | |
d6f2da5b | 1461 | ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED; |
f0706e82 JB |
1462 | } |
1463 | ||
1464 | ||
1465 | static void ieee80211_rx_mgmt_disassoc(struct net_device *dev, | |
1466 | struct ieee80211_if_sta *ifsta, | |
1467 | struct ieee80211_mgmt *mgmt, | |
1468 | size_t len) | |
1469 | { | |
1470 | u16 reason_code; | |
0795af57 | 1471 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
1472 | |
1473 | if (len < 24 + 2) { | |
1474 | printk(KERN_DEBUG "%s: too short (%zd) disassociation frame " | |
0795af57 JP |
1475 | "received from %s - ignored\n", |
1476 | dev->name, len, print_mac(mac, mgmt->sa)); | |
f0706e82 JB |
1477 | return; |
1478 | } | |
1479 | ||
1480 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) { | |
1481 | printk(KERN_DEBUG "%s: disassociation frame received from " | |
0795af57 JP |
1482 | "unknown AP (SA=%s BSSID=%s) - " |
1483 | "ignored\n", dev->name, print_mac(mac, mgmt->sa), | |
1484 | print_mac(mac, mgmt->bssid)); | |
f0706e82 JB |
1485 | return; |
1486 | } | |
1487 | ||
1488 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
1489 | ||
0795af57 | 1490 | printk(KERN_DEBUG "%s: RX disassociation from %s" |
f0706e82 | 1491 | " (reason=%d)\n", |
0795af57 | 1492 | dev->name, print_mac(mac, mgmt->sa), reason_code); |
f0706e82 | 1493 | |
d6f2da5b | 1494 | if (ifsta->flags & IEEE80211_STA_ASSOCIATED) |
f0706e82 JB |
1495 | printk(KERN_DEBUG "%s: disassociated\n", dev->name); |
1496 | ||
1497 | if (ifsta->state == IEEE80211_ASSOCIATED) { | |
1498 | ifsta->state = IEEE80211_ASSOCIATE; | |
1499 | mod_timer(&ifsta->timer, jiffies + | |
1500 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1501 | } | |
1502 | ||
1503 | ieee80211_set_disassoc(dev, ifsta, 0); | |
1504 | } | |
1505 | ||
1506 | ||
1507 | static void ieee80211_rx_mgmt_assoc_resp(struct net_device *dev, | |
1508 | struct ieee80211_if_sta *ifsta, | |
1509 | struct ieee80211_mgmt *mgmt, | |
1510 | size_t len, | |
1511 | int reassoc) | |
1512 | { | |
1513 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1514 | struct ieee80211_hw_mode *mode; | |
1515 | struct sta_info *sta; | |
1516 | u32 rates; | |
1517 | u16 capab_info, status_code, aid; | |
1518 | struct ieee802_11_elems elems; | |
1519 | u8 *pos; | |
1520 | int i, j; | |
0795af57 | 1521 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
1522 | |
1523 | /* AssocResp and ReassocResp have identical structure, so process both | |
1524 | * of them in this function. */ | |
1525 | ||
1526 | if (ifsta->state != IEEE80211_ASSOCIATE) { | |
1527 | printk(KERN_DEBUG "%s: association frame received from " | |
0795af57 JP |
1528 | "%s, but not in associate state - ignored\n", |
1529 | dev->name, print_mac(mac, mgmt->sa)); | |
f0706e82 JB |
1530 | return; |
1531 | } | |
1532 | ||
1533 | if (len < 24 + 6) { | |
1534 | printk(KERN_DEBUG "%s: too short (%zd) association frame " | |
0795af57 JP |
1535 | "received from %s - ignored\n", |
1536 | dev->name, len, print_mac(mac, mgmt->sa)); | |
f0706e82 JB |
1537 | return; |
1538 | } | |
1539 | ||
1540 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) { | |
1541 | printk(KERN_DEBUG "%s: association frame received from " | |
0795af57 JP |
1542 | "unknown AP (SA=%s BSSID=%s) - " |
1543 | "ignored\n", dev->name, print_mac(mac, mgmt->sa), | |
1544 | print_mac(mac, mgmt->bssid)); | |
f0706e82 JB |
1545 | return; |
1546 | } | |
1547 | ||
1548 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
1549 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
1550 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
f0706e82 | 1551 | |
0795af57 | 1552 | printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x " |
f0706e82 | 1553 | "status=%d aid=%d)\n", |
0795af57 | 1554 | dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa), |
ddd68587 | 1555 | capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); |
f0706e82 JB |
1556 | |
1557 | if (status_code != WLAN_STATUS_SUCCESS) { | |
1558 | printk(KERN_DEBUG "%s: AP denied association (code=%d)\n", | |
1559 | dev->name, status_code); | |
8a69aa93 DD |
1560 | /* if this was a reassociation, ensure we try a "full" |
1561 | * association next time. This works around some broken APs | |
1562 | * which do not correctly reject reassociation requests. */ | |
d6f2da5b | 1563 | ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
f0706e82 JB |
1564 | return; |
1565 | } | |
1566 | ||
1dd84aa2 JB |
1567 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
1568 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " | |
1569 | "set\n", dev->name, aid); | |
1570 | aid &= ~(BIT(15) | BIT(14)); | |
1571 | ||
f0706e82 | 1572 | pos = mgmt->u.assoc_resp.variable; |
67a4cce4 | 1573 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
f0706e82 JB |
1574 | |
1575 | if (!elems.supp_rates) { | |
1576 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", | |
1577 | dev->name); | |
1578 | return; | |
1579 | } | |
1580 | ||
1581 | printk(KERN_DEBUG "%s: associated\n", dev->name); | |
1582 | ifsta->aid = aid; | |
1583 | ifsta->ap_capab = capab_info; | |
1584 | ||
1585 | kfree(ifsta->assocresp_ies); | |
1586 | ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt); | |
0ec0b7ac | 1587 | ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL); |
f0706e82 JB |
1588 | if (ifsta->assocresp_ies) |
1589 | memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len); | |
1590 | ||
1591 | ieee80211_set_associated(dev, ifsta, 1); | |
1592 | ||
1593 | /* Add STA entry for the AP */ | |
1594 | sta = sta_info_get(local, ifsta->bssid); | |
1595 | if (!sta) { | |
1596 | struct ieee80211_sta_bss *bss; | |
0ec0b7ac | 1597 | sta = sta_info_add(local, dev, ifsta->bssid, GFP_KERNEL); |
f0706e82 JB |
1598 | if (!sta) { |
1599 | printk(KERN_DEBUG "%s: failed to add STA entry for the" | |
1600 | " AP\n", dev->name); | |
1601 | return; | |
1602 | } | |
65c107ab | 1603 | bss = ieee80211_rx_bss_get(dev, ifsta->bssid, |
cffdd30d JL |
1604 | local->hw.conf.channel, |
1605 | ifsta->ssid, ifsta->ssid_len); | |
f0706e82 JB |
1606 | if (bss) { |
1607 | sta->last_rssi = bss->rssi; | |
1608 | sta->last_signal = bss->signal; | |
1609 | sta->last_noise = bss->noise; | |
1610 | ieee80211_rx_bss_put(dev, bss); | |
1611 | } | |
1612 | } | |
1613 | ||
1614 | sta->dev = dev; | |
c9ee23df | 1615 | sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP; |
f0706e82 JB |
1616 | |
1617 | rates = 0; | |
1618 | mode = local->oper_hw_mode; | |
1619 | for (i = 0; i < elems.supp_rates_len; i++) { | |
1620 | int rate = (elems.supp_rates[i] & 0x7f) * 5; | |
f0706e82 JB |
1621 | for (j = 0; j < mode->num_rates; j++) |
1622 | if (mode->rates[j].rate == rate) | |
1623 | rates |= BIT(j); | |
1624 | } | |
1625 | for (i = 0; i < elems.ext_supp_rates_len; i++) { | |
1626 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; | |
f0706e82 JB |
1627 | for (j = 0; j < mode->num_rates; j++) |
1628 | if (mode->rates[j].rate == rate) | |
1629 | rates |= BIT(j); | |
1630 | } | |
1631 | sta->supp_rates = rates; | |
1632 | ||
d3c990fb RR |
1633 | if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param && |
1634 | local->ops->conf_ht) { | |
1635 | struct ieee80211_ht_bss_info bss_info; | |
1636 | ||
1637 | ieee80211_ht_cap_ie_to_ht_info( | |
1638 | (struct ieee80211_ht_cap *) | |
1639 | elems.ht_cap_elem, &sta->ht_info); | |
1640 | ieee80211_ht_addt_info_ie_to_ht_bss_info( | |
1641 | (struct ieee80211_ht_addt_info *) | |
1642 | elems.ht_info_elem, &bss_info); | |
1643 | ieee80211_hw_config_ht(local, 1, &sta->ht_info, &bss_info); | |
1644 | } | |
1645 | ||
f0706e82 JB |
1646 | rate_control_rate_init(sta, local); |
1647 | ||
d6f2da5b | 1648 | if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) { |
f0706e82 JB |
1649 | sta->flags |= WLAN_STA_WME; |
1650 | ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param, | |
1651 | elems.wmm_param_len); | |
1652 | } | |
1653 | ||
1654 | ||
1655 | sta_info_put(sta); | |
1656 | ||
1657 | ieee80211_associated(dev, ifsta); | |
1658 | } | |
1659 | ||
1660 | ||
1661 | /* Caller must hold local->sta_bss_lock */ | |
1662 | static void __ieee80211_rx_bss_hash_add(struct net_device *dev, | |
1663 | struct ieee80211_sta_bss *bss) | |
1664 | { | |
1665 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1666 | bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)]; | |
1667 | local->sta_bss_hash[STA_HASH(bss->bssid)] = bss; | |
1668 | } | |
1669 | ||
1670 | ||
1671 | /* Caller must hold local->sta_bss_lock */ | |
1672 | static void __ieee80211_rx_bss_hash_del(struct net_device *dev, | |
1673 | struct ieee80211_sta_bss *bss) | |
1674 | { | |
1675 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1676 | struct ieee80211_sta_bss *b, *prev = NULL; | |
1677 | b = local->sta_bss_hash[STA_HASH(bss->bssid)]; | |
1678 | while (b) { | |
1679 | if (b == bss) { | |
1680 | if (!prev) | |
1681 | local->sta_bss_hash[STA_HASH(bss->bssid)] = | |
1682 | bss->hnext; | |
1683 | else | |
1684 | prev->hnext = bss->hnext; | |
1685 | break; | |
1686 | } | |
1687 | prev = b; | |
1688 | b = b->hnext; | |
1689 | } | |
1690 | } | |
1691 | ||
1692 | ||
1693 | static struct ieee80211_sta_bss * | |
cffdd30d JL |
1694 | ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int channel, |
1695 | u8 *ssid, u8 ssid_len) | |
f0706e82 JB |
1696 | { |
1697 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1698 | struct ieee80211_sta_bss *bss; | |
1699 | ||
dd00cc48 | 1700 | bss = kzalloc(sizeof(*bss), GFP_ATOMIC); |
f0706e82 JB |
1701 | if (!bss) |
1702 | return NULL; | |
f0706e82 JB |
1703 | atomic_inc(&bss->users); |
1704 | atomic_inc(&bss->users); | |
1705 | memcpy(bss->bssid, bssid, ETH_ALEN); | |
65c107ab | 1706 | bss->channel = channel; |
cffdd30d JL |
1707 | if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) { |
1708 | memcpy(bss->ssid, ssid, ssid_len); | |
1709 | bss->ssid_len = ssid_len; | |
1710 | } | |
f0706e82 JB |
1711 | |
1712 | spin_lock_bh(&local->sta_bss_lock); | |
1713 | /* TODO: order by RSSI? */ | |
1714 | list_add_tail(&bss->list, &local->sta_bss_list); | |
1715 | __ieee80211_rx_bss_hash_add(dev, bss); | |
1716 | spin_unlock_bh(&local->sta_bss_lock); | |
1717 | return bss; | |
1718 | } | |
1719 | ||
1720 | ||
1721 | static struct ieee80211_sta_bss * | |
cffdd30d JL |
1722 | ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel, |
1723 | u8 *ssid, u8 ssid_len) | |
f0706e82 JB |
1724 | { |
1725 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1726 | struct ieee80211_sta_bss *bss; | |
1727 | ||
1728 | spin_lock_bh(&local->sta_bss_lock); | |
1729 | bss = local->sta_bss_hash[STA_HASH(bssid)]; | |
1730 | while (bss) { | |
cffdd30d JL |
1731 | if (!memcmp(bss->bssid, bssid, ETH_ALEN) && |
1732 | bss->channel == channel && | |
1733 | bss->ssid_len == ssid_len && | |
1734 | (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) { | |
f0706e82 JB |
1735 | atomic_inc(&bss->users); |
1736 | break; | |
1737 | } | |
1738 | bss = bss->hnext; | |
1739 | } | |
1740 | spin_unlock_bh(&local->sta_bss_lock); | |
1741 | return bss; | |
1742 | } | |
1743 | ||
1744 | ||
1745 | static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss) | |
1746 | { | |
1747 | kfree(bss->wpa_ie); | |
1748 | kfree(bss->rsn_ie); | |
1749 | kfree(bss->wmm_ie); | |
c7153508 | 1750 | kfree(bss->ht_ie); |
f0706e82 JB |
1751 | kfree(bss); |
1752 | } | |
1753 | ||
1754 | ||
1755 | static void ieee80211_rx_bss_put(struct net_device *dev, | |
1756 | struct ieee80211_sta_bss *bss) | |
1757 | { | |
1758 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1759 | if (!atomic_dec_and_test(&bss->users)) | |
1760 | return; | |
1761 | ||
1762 | spin_lock_bh(&local->sta_bss_lock); | |
1763 | __ieee80211_rx_bss_hash_del(dev, bss); | |
1764 | list_del(&bss->list); | |
1765 | spin_unlock_bh(&local->sta_bss_lock); | |
1766 | ieee80211_rx_bss_free(bss); | |
1767 | } | |
1768 | ||
1769 | ||
1770 | void ieee80211_rx_bss_list_init(struct net_device *dev) | |
1771 | { | |
1772 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1773 | spin_lock_init(&local->sta_bss_lock); | |
1774 | INIT_LIST_HEAD(&local->sta_bss_list); | |
1775 | } | |
1776 | ||
1777 | ||
1778 | void ieee80211_rx_bss_list_deinit(struct net_device *dev) | |
1779 | { | |
1780 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1781 | struct ieee80211_sta_bss *bss, *tmp; | |
1782 | ||
1783 | list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list) | |
1784 | ieee80211_rx_bss_put(dev, bss); | |
1785 | } | |
1786 | ||
1787 | ||
1788 | static void ieee80211_rx_bss_info(struct net_device *dev, | |
1789 | struct ieee80211_mgmt *mgmt, | |
1790 | size_t len, | |
1791 | struct ieee80211_rx_status *rx_status, | |
1792 | int beacon) | |
1793 | { | |
1794 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1795 | struct ieee802_11_elems elems; | |
1796 | size_t baselen; | |
67a4cce4 | 1797 | int channel, clen; |
f0706e82 JB |
1798 | struct ieee80211_sta_bss *bss; |
1799 | struct sta_info *sta; | |
1800 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1801 | u64 timestamp; | |
0795af57 JP |
1802 | DECLARE_MAC_BUF(mac); |
1803 | DECLARE_MAC_BUF(mac2); | |
f0706e82 JB |
1804 | |
1805 | if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN)) | |
1806 | return; /* ignore ProbeResp to foreign address */ | |
1807 | ||
1808 | #if 0 | |
0795af57 | 1809 | printk(KERN_DEBUG "%s: RX %s from %s to %s\n", |
f0706e82 | 1810 | dev->name, beacon ? "Beacon" : "Probe Response", |
0795af57 | 1811 | print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da)); |
f0706e82 JB |
1812 | #endif |
1813 | ||
1814 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
1815 | if (baselen > len) | |
1816 | return; | |
1817 | ||
1818 | timestamp = le64_to_cpu(mgmt->u.beacon.timestamp); | |
1819 | ||
1820 | if (sdata->type == IEEE80211_IF_TYPE_IBSS && beacon && | |
1821 | memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) { | |
1822 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
1823 | static unsigned long last_tsf_debug = 0; | |
1824 | u64 tsf; | |
1825 | if (local->ops->get_tsf) | |
1826 | tsf = local->ops->get_tsf(local_to_hw(local)); | |
1827 | else | |
1828 | tsf = -1LLU; | |
1829 | if (time_after(jiffies, last_tsf_debug + 5 * HZ)) { | |
0795af57 JP |
1830 | printk(KERN_DEBUG "RX beacon SA=%s BSSID=" |
1831 | "%s TSF=0x%llx BCN=0x%llx diff=%lld " | |
f0706e82 | 1832 | "@%lu\n", |
0795af57 | 1833 | print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->bssid), |
f0706e82 JB |
1834 | (unsigned long long)tsf, |
1835 | (unsigned long long)timestamp, | |
1836 | (unsigned long long)(tsf - timestamp), | |
1837 | jiffies); | |
1838 | last_tsf_debug = jiffies; | |
1839 | } | |
1840 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
1841 | } | |
1842 | ||
67a4cce4 | 1843 | ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems); |
f0706e82 JB |
1844 | |
1845 | if (sdata->type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates && | |
1846 | memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 && | |
1847 | (sta = sta_info_get(local, mgmt->sa))) { | |
1848 | struct ieee80211_hw_mode *mode; | |
1849 | struct ieee80211_rate *rates; | |
1850 | size_t num_rates; | |
1851 | u32 supp_rates, prev_rates; | |
1852 | int i, j; | |
1853 | ||
ece8eddd | 1854 | mode = local->sta_sw_scanning ? |
f0706e82 | 1855 | local->scan_hw_mode : local->oper_hw_mode; |
ece8eddd ZY |
1856 | |
1857 | if (local->sta_hw_scanning) { | |
1858 | /* search for the correct mode matches the beacon */ | |
1859 | list_for_each_entry(mode, &local->modes_list, list) | |
1860 | if (mode->mode == rx_status->phymode) | |
1861 | break; | |
1862 | ||
1863 | if (mode == NULL) | |
1864 | mode = local->oper_hw_mode; | |
1865 | } | |
f0706e82 JB |
1866 | rates = mode->rates; |
1867 | num_rates = mode->num_rates; | |
1868 | ||
1869 | supp_rates = 0; | |
1870 | for (i = 0; i < elems.supp_rates_len + | |
1871 | elems.ext_supp_rates_len; i++) { | |
1872 | u8 rate = 0; | |
1873 | int own_rate; | |
1874 | if (i < elems.supp_rates_len) | |
1875 | rate = elems.supp_rates[i]; | |
1876 | else if (elems.ext_supp_rates) | |
1877 | rate = elems.ext_supp_rates | |
1878 | [i - elems.supp_rates_len]; | |
1879 | own_rate = 5 * (rate & 0x7f); | |
f0706e82 JB |
1880 | for (j = 0; j < num_rates; j++) |
1881 | if (rates[j].rate == own_rate) | |
1882 | supp_rates |= BIT(j); | |
1883 | } | |
1884 | ||
1885 | prev_rates = sta->supp_rates; | |
1886 | sta->supp_rates &= supp_rates; | |
1887 | if (sta->supp_rates == 0) { | |
1888 | /* No matching rates - this should not really happen. | |
1889 | * Make sure that at least one rate is marked | |
1890 | * supported to avoid issues with TX rate ctrl. */ | |
1891 | sta->supp_rates = sdata->u.sta.supp_rates_bits; | |
1892 | } | |
1893 | if (sta->supp_rates != prev_rates) { | |
1894 | printk(KERN_DEBUG "%s: updated supp_rates set for " | |
0795af57 | 1895 | "%s based on beacon info (0x%x & 0x%x -> " |
f0706e82 | 1896 | "0x%x)\n", |
0795af57 | 1897 | dev->name, print_mac(mac, sta->addr), prev_rates, |
f0706e82 JB |
1898 | supp_rates, sta->supp_rates); |
1899 | } | |
1900 | sta_info_put(sta); | |
1901 | } | |
1902 | ||
1903 | if (!elems.ssid) | |
1904 | return; | |
1905 | ||
1906 | if (elems.ds_params && elems.ds_params_len == 1) | |
1907 | channel = elems.ds_params[0]; | |
1908 | else | |
1909 | channel = rx_status->channel; | |
1910 | ||
cffdd30d JL |
1911 | bss = ieee80211_rx_bss_get(dev, mgmt->bssid, channel, |
1912 | elems.ssid, elems.ssid_len); | |
f0706e82 | 1913 | if (!bss) { |
cffdd30d JL |
1914 | bss = ieee80211_rx_bss_add(dev, mgmt->bssid, channel, |
1915 | elems.ssid, elems.ssid_len); | |
f0706e82 JB |
1916 | if (!bss) |
1917 | return; | |
1918 | } else { | |
1919 | #if 0 | |
1920 | /* TODO: order by RSSI? */ | |
1921 | spin_lock_bh(&local->sta_bss_lock); | |
1922 | list_move_tail(&bss->list, &local->sta_bss_list); | |
1923 | spin_unlock_bh(&local->sta_bss_lock); | |
1924 | #endif | |
1925 | } | |
1926 | ||
1927 | if (bss->probe_resp && beacon) { | |
1928 | /* Do not allow beacon to override data from Probe Response. */ | |
1929 | ieee80211_rx_bss_put(dev, bss); | |
1930 | return; | |
1931 | } | |
1932 | ||
5628221c DD |
1933 | /* save the ERP value so that it is available at association time */ |
1934 | if (elems.erp_info && elems.erp_info_len >= 1) { | |
1935 | bss->erp_value = elems.erp_info[0]; | |
1936 | bss->has_erp_value = 1; | |
1937 | } | |
1938 | ||
f0706e82 JB |
1939 | bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int); |
1940 | bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info); | |
f0706e82 JB |
1941 | |
1942 | bss->supp_rates_len = 0; | |
1943 | if (elems.supp_rates) { | |
1944 | clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len; | |
1945 | if (clen > elems.supp_rates_len) | |
1946 | clen = elems.supp_rates_len; | |
1947 | memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates, | |
1948 | clen); | |
1949 | bss->supp_rates_len += clen; | |
1950 | } | |
1951 | if (elems.ext_supp_rates) { | |
1952 | clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len; | |
1953 | if (clen > elems.ext_supp_rates_len) | |
1954 | clen = elems.ext_supp_rates_len; | |
1955 | memcpy(&bss->supp_rates[bss->supp_rates_len], | |
1956 | elems.ext_supp_rates, clen); | |
1957 | bss->supp_rates_len += clen; | |
1958 | } | |
1959 | ||
1960 | if (elems.wpa && | |
1961 | (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len || | |
1962 | memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) { | |
1963 | kfree(bss->wpa_ie); | |
1964 | bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC); | |
1965 | if (bss->wpa_ie) { | |
1966 | memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2); | |
1967 | bss->wpa_ie_len = elems.wpa_len + 2; | |
1968 | } else | |
1969 | bss->wpa_ie_len = 0; | |
1970 | } else if (!elems.wpa && bss->wpa_ie) { | |
1971 | kfree(bss->wpa_ie); | |
1972 | bss->wpa_ie = NULL; | |
1973 | bss->wpa_ie_len = 0; | |
1974 | } | |
1975 | ||
1976 | if (elems.rsn && | |
1977 | (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len || | |
1978 | memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) { | |
1979 | kfree(bss->rsn_ie); | |
1980 | bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC); | |
1981 | if (bss->rsn_ie) { | |
1982 | memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2); | |
1983 | bss->rsn_ie_len = elems.rsn_len + 2; | |
1984 | } else | |
1985 | bss->rsn_ie_len = 0; | |
1986 | } else if (!elems.rsn && bss->rsn_ie) { | |
1987 | kfree(bss->rsn_ie); | |
1988 | bss->rsn_ie = NULL; | |
1989 | bss->rsn_ie_len = 0; | |
1990 | } | |
1991 | ||
1992 | if (elems.wmm_param && | |
1993 | (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len || | |
1994 | memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) { | |
1995 | kfree(bss->wmm_ie); | |
1996 | bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC); | |
1997 | if (bss->wmm_ie) { | |
1998 | memcpy(bss->wmm_ie, elems.wmm_param - 2, | |
1999 | elems.wmm_param_len + 2); | |
2000 | bss->wmm_ie_len = elems.wmm_param_len + 2; | |
2001 | } else | |
2002 | bss->wmm_ie_len = 0; | |
2003 | } else if (!elems.wmm_param && bss->wmm_ie) { | |
2004 | kfree(bss->wmm_ie); | |
2005 | bss->wmm_ie = NULL; | |
2006 | bss->wmm_ie_len = 0; | |
2007 | } | |
c7153508 RR |
2008 | if (elems.ht_cap_elem && |
2009 | (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len || | |
2010 | memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) { | |
2011 | kfree(bss->ht_ie); | |
2012 | bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC); | |
2013 | if (bss->ht_ie) { | |
2014 | memcpy(bss->ht_ie, elems.ht_cap_elem - 2, | |
2015 | elems.ht_cap_elem_len + 2); | |
2016 | bss->ht_ie_len = elems.ht_cap_elem_len + 2; | |
2017 | } else | |
2018 | bss->ht_ie_len = 0; | |
2019 | } else if (!elems.ht_cap_elem && bss->ht_ie) { | |
2020 | kfree(bss->ht_ie); | |
2021 | bss->ht_ie = NULL; | |
2022 | bss->ht_ie_len = 0; | |
2023 | } | |
f0706e82 JB |
2024 | |
2025 | bss->hw_mode = rx_status->phymode; | |
f0706e82 JB |
2026 | bss->freq = rx_status->freq; |
2027 | if (channel != rx_status->channel && | |
2028 | (bss->hw_mode == MODE_IEEE80211G || | |
2029 | bss->hw_mode == MODE_IEEE80211B) && | |
2030 | channel >= 1 && channel <= 14) { | |
2031 | static const int freq_list[] = { | |
2032 | 2412, 2417, 2422, 2427, 2432, 2437, 2442, | |
2033 | 2447, 2452, 2457, 2462, 2467, 2472, 2484 | |
2034 | }; | |
2035 | /* IEEE 802.11g/b mode can receive packets from neighboring | |
2036 | * channels, so map the channel into frequency. */ | |
2037 | bss->freq = freq_list[channel - 1]; | |
2038 | } | |
2039 | bss->timestamp = timestamp; | |
2040 | bss->last_update = jiffies; | |
2041 | bss->rssi = rx_status->ssi; | |
2042 | bss->signal = rx_status->signal; | |
2043 | bss->noise = rx_status->noise; | |
2044 | if (!beacon) | |
2045 | bss->probe_resp++; | |
2046 | ieee80211_rx_bss_put(dev, bss); | |
2047 | } | |
2048 | ||
2049 | ||
2050 | static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev, | |
2051 | struct ieee80211_mgmt *mgmt, | |
2052 | size_t len, | |
2053 | struct ieee80211_rx_status *rx_status) | |
2054 | { | |
2055 | ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0); | |
2056 | } | |
2057 | ||
2058 | ||
2059 | static void ieee80211_rx_mgmt_beacon(struct net_device *dev, | |
2060 | struct ieee80211_mgmt *mgmt, | |
2061 | size_t len, | |
2062 | struct ieee80211_rx_status *rx_status) | |
2063 | { | |
f0706e82 JB |
2064 | struct ieee80211_sub_if_data *sdata; |
2065 | struct ieee80211_if_sta *ifsta; | |
f0706e82 JB |
2066 | size_t baselen; |
2067 | struct ieee802_11_elems elems; | |
d3c990fb RR |
2068 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
2069 | struct ieee80211_conf *conf = &local->hw.conf; | |
f0706e82 JB |
2070 | |
2071 | ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1); | |
2072 | ||
2073 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2074 | if (sdata->type != IEEE80211_IF_TYPE_STA) | |
2075 | return; | |
2076 | ifsta = &sdata->u.sta; | |
2077 | ||
d6f2da5b | 2078 | if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) || |
f0706e82 JB |
2079 | memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) |
2080 | return; | |
2081 | ||
2082 | /* Process beacon from the current BSS */ | |
2083 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
2084 | if (baselen > len) | |
2085 | return; | |
2086 | ||
67a4cce4 | 2087 | ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems); |
f0706e82 | 2088 | |
5628221c DD |
2089 | if (elems.erp_info && elems.erp_info_len >= 1) |
2090 | ieee80211_handle_erp_ie(dev, elems.erp_info[0]); | |
f0706e82 | 2091 | |
d3c990fb RR |
2092 | if (elems.ht_cap_elem && elems.ht_info_elem && |
2093 | elems.wmm_param && local->ops->conf_ht && | |
2094 | conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) { | |
2095 | struct ieee80211_ht_bss_info bss_info; | |
2096 | ||
2097 | ieee80211_ht_addt_info_ie_to_ht_bss_info( | |
2098 | (struct ieee80211_ht_addt_info *) | |
2099 | elems.ht_info_elem, &bss_info); | |
2100 | /* check if AP changed bss inforamation */ | |
2101 | if ((conf->ht_bss_conf.primary_channel != | |
2102 | bss_info.primary_channel) || | |
2103 | (conf->ht_bss_conf.bss_cap != bss_info.bss_cap) || | |
2104 | (conf->ht_bss_conf.bss_op_mode != bss_info.bss_op_mode)) | |
2105 | ieee80211_hw_config_ht(local, 1, &conf->ht_conf, | |
2106 | &bss_info); | |
2107 | } | |
2108 | ||
d6f2da5b | 2109 | if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) { |
f0706e82 JB |
2110 | ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param, |
2111 | elems.wmm_param_len); | |
2112 | } | |
2113 | } | |
2114 | ||
2115 | ||
2116 | static void ieee80211_rx_mgmt_probe_req(struct net_device *dev, | |
2117 | struct ieee80211_if_sta *ifsta, | |
2118 | struct ieee80211_mgmt *mgmt, | |
2119 | size_t len, | |
2120 | struct ieee80211_rx_status *rx_status) | |
2121 | { | |
2122 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2123 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2124 | int tx_last_beacon; | |
2125 | struct sk_buff *skb; | |
2126 | struct ieee80211_mgmt *resp; | |
2127 | u8 *pos, *end; | |
0795af57 JP |
2128 | DECLARE_MAC_BUF(mac); |
2129 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
2130 | DECLARE_MAC_BUF(mac2); | |
2131 | DECLARE_MAC_BUF(mac3); | |
2132 | #endif | |
f0706e82 JB |
2133 | |
2134 | if (sdata->type != IEEE80211_IF_TYPE_IBSS || | |
2135 | ifsta->state != IEEE80211_IBSS_JOINED || | |
2136 | len < 24 + 2 || !ifsta->probe_resp) | |
2137 | return; | |
2138 | ||
2139 | if (local->ops->tx_last_beacon) | |
2140 | tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local)); | |
2141 | else | |
2142 | tx_last_beacon = 1; | |
2143 | ||
2144 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0795af57 JP |
2145 | printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID=" |
2146 | "%s (tx_last_beacon=%d)\n", | |
2147 | dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da), | |
2148 | print_mac(mac3, mgmt->bssid), tx_last_beacon); | |
f0706e82 JB |
2149 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
2150 | ||
2151 | if (!tx_last_beacon) | |
2152 | return; | |
2153 | ||
2154 | if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 && | |
2155 | memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0) | |
2156 | return; | |
2157 | ||
2158 | end = ((u8 *) mgmt) + len; | |
2159 | pos = mgmt->u.probe_req.variable; | |
2160 | if (pos[0] != WLAN_EID_SSID || | |
2161 | pos + 2 + pos[1] > end) { | |
2162 | if (net_ratelimit()) { | |
2163 | printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq " | |
0795af57 JP |
2164 | "from %s\n", |
2165 | dev->name, print_mac(mac, mgmt->sa)); | |
f0706e82 JB |
2166 | } |
2167 | return; | |
2168 | } | |
2169 | if (pos[1] != 0 && | |
2170 | (pos[1] != ifsta->ssid_len || | |
2171 | memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) { | |
2172 | /* Ignore ProbeReq for foreign SSID */ | |
2173 | return; | |
2174 | } | |
2175 | ||
2176 | /* Reply with ProbeResp */ | |
0ec0b7ac | 2177 | skb = skb_copy(ifsta->probe_resp, GFP_KERNEL); |
f0706e82 JB |
2178 | if (!skb) |
2179 | return; | |
2180 | ||
2181 | resp = (struct ieee80211_mgmt *) skb->data; | |
2182 | memcpy(resp->da, mgmt->sa, ETH_ALEN); | |
2183 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0795af57 JP |
2184 | printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n", |
2185 | dev->name, print_mac(mac, resp->da)); | |
f0706e82 JB |
2186 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
2187 | ieee80211_sta_tx(dev, skb, 0); | |
2188 | } | |
2189 | ||
4e20cb29 JB |
2190 | static void ieee80211_rx_mgmt_action(struct net_device *dev, |
2191 | struct ieee80211_if_sta *ifsta, | |
2192 | struct ieee80211_mgmt *mgmt, | |
2193 | size_t len) | |
9f985b0e RR |
2194 | { |
2195 | if (len < IEEE80211_MIN_ACTION_SIZE) | |
2196 | return; | |
2197 | ||
2198 | switch (mgmt->u.action.category) { | |
2199 | case WLAN_CATEGORY_BACK: | |
2200 | switch (mgmt->u.action.u.addba_req.action_code) { | |
2201 | case WLAN_ACTION_ADDBA_REQ: | |
2202 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2203 | sizeof(mgmt->u.action.u.addba_req))) | |
2204 | break; | |
2205 | ieee80211_sta_process_addba_request(dev, mgmt, len); | |
2206 | break; | |
2207 | default: | |
2208 | if (net_ratelimit()) | |
2209 | printk(KERN_DEBUG "%s: received unsupported BACK\n", | |
2210 | dev->name); | |
2211 | break; | |
2212 | } | |
2213 | break; | |
2214 | default: | |
2215 | break; | |
2216 | } | |
2217 | } | |
f0706e82 JB |
2218 | |
2219 | void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb, | |
2220 | struct ieee80211_rx_status *rx_status) | |
2221 | { | |
2222 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2223 | struct ieee80211_sub_if_data *sdata; | |
2224 | struct ieee80211_if_sta *ifsta; | |
2225 | struct ieee80211_mgmt *mgmt; | |
2226 | u16 fc; | |
2227 | ||
2228 | if (skb->len < 24) | |
2229 | goto fail; | |
2230 | ||
2231 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2232 | ifsta = &sdata->u.sta; | |
2233 | ||
2234 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
2235 | fc = le16_to_cpu(mgmt->frame_control); | |
2236 | ||
2237 | switch (fc & IEEE80211_FCTL_STYPE) { | |
2238 | case IEEE80211_STYPE_PROBE_REQ: | |
2239 | case IEEE80211_STYPE_PROBE_RESP: | |
2240 | case IEEE80211_STYPE_BEACON: | |
2241 | memcpy(skb->cb, rx_status, sizeof(*rx_status)); | |
2242 | case IEEE80211_STYPE_AUTH: | |
2243 | case IEEE80211_STYPE_ASSOC_RESP: | |
2244 | case IEEE80211_STYPE_REASSOC_RESP: | |
2245 | case IEEE80211_STYPE_DEAUTH: | |
2246 | case IEEE80211_STYPE_DISASSOC: | |
9f985b0e | 2247 | case IEEE80211_STYPE_ACTION: |
f0706e82 JB |
2248 | skb_queue_tail(&ifsta->skb_queue, skb); |
2249 | queue_work(local->hw.workqueue, &ifsta->work); | |
2250 | return; | |
2251 | default: | |
2252 | printk(KERN_DEBUG "%s: received unknown management frame - " | |
2253 | "stype=%d\n", dev->name, | |
2254 | (fc & IEEE80211_FCTL_STYPE) >> 4); | |
2255 | break; | |
2256 | } | |
2257 | ||
2258 | fail: | |
2259 | kfree_skb(skb); | |
2260 | } | |
2261 | ||
2262 | ||
2263 | static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev, | |
2264 | struct sk_buff *skb) | |
2265 | { | |
2266 | struct ieee80211_rx_status *rx_status; | |
2267 | struct ieee80211_sub_if_data *sdata; | |
2268 | struct ieee80211_if_sta *ifsta; | |
2269 | struct ieee80211_mgmt *mgmt; | |
2270 | u16 fc; | |
2271 | ||
2272 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2273 | ifsta = &sdata->u.sta; | |
2274 | ||
2275 | rx_status = (struct ieee80211_rx_status *) skb->cb; | |
2276 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
2277 | fc = le16_to_cpu(mgmt->frame_control); | |
2278 | ||
2279 | switch (fc & IEEE80211_FCTL_STYPE) { | |
2280 | case IEEE80211_STYPE_PROBE_REQ: | |
2281 | ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len, | |
2282 | rx_status); | |
2283 | break; | |
2284 | case IEEE80211_STYPE_PROBE_RESP: | |
2285 | ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status); | |
2286 | break; | |
2287 | case IEEE80211_STYPE_BEACON: | |
2288 | ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status); | |
2289 | break; | |
2290 | case IEEE80211_STYPE_AUTH: | |
2291 | ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len); | |
2292 | break; | |
2293 | case IEEE80211_STYPE_ASSOC_RESP: | |
2294 | ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 0); | |
2295 | break; | |
2296 | case IEEE80211_STYPE_REASSOC_RESP: | |
2297 | ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 1); | |
2298 | break; | |
2299 | case IEEE80211_STYPE_DEAUTH: | |
2300 | ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len); | |
2301 | break; | |
2302 | case IEEE80211_STYPE_DISASSOC: | |
2303 | ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len); | |
2304 | break; | |
9f985b0e RR |
2305 | case IEEE80211_STYPE_ACTION: |
2306 | ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len); | |
2307 | break; | |
f0706e82 JB |
2308 | } |
2309 | ||
2310 | kfree_skb(skb); | |
2311 | } | |
2312 | ||
2313 | ||
ece8eddd ZY |
2314 | ieee80211_txrx_result |
2315 | ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb, | |
2316 | struct ieee80211_rx_status *rx_status) | |
f0706e82 JB |
2317 | { |
2318 | struct ieee80211_mgmt *mgmt; | |
2319 | u16 fc; | |
2320 | ||
ece8eddd ZY |
2321 | if (skb->len < 2) |
2322 | return TXRX_DROP; | |
f0706e82 JB |
2323 | |
2324 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
2325 | fc = le16_to_cpu(mgmt->frame_control); | |
2326 | ||
ece8eddd ZY |
2327 | if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL) |
2328 | return TXRX_CONTINUE; | |
2329 | ||
2330 | if (skb->len < 24) | |
2331 | return TXRX_DROP; | |
2332 | ||
f0706e82 JB |
2333 | if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) { |
2334 | if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) { | |
2335 | ieee80211_rx_mgmt_probe_resp(dev, mgmt, | |
2336 | skb->len, rx_status); | |
ece8eddd ZY |
2337 | dev_kfree_skb(skb); |
2338 | return TXRX_QUEUED; | |
f0706e82 JB |
2339 | } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) { |
2340 | ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, | |
2341 | rx_status); | |
ece8eddd ZY |
2342 | dev_kfree_skb(skb); |
2343 | return TXRX_QUEUED; | |
f0706e82 JB |
2344 | } |
2345 | } | |
ece8eddd | 2346 | return TXRX_CONTINUE; |
f0706e82 JB |
2347 | } |
2348 | ||
2349 | ||
2350 | static int ieee80211_sta_active_ibss(struct net_device *dev) | |
2351 | { | |
2352 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2353 | int active = 0; | |
2354 | struct sta_info *sta; | |
2355 | ||
be8755e1 | 2356 | read_lock_bh(&local->sta_lock); |
f0706e82 JB |
2357 | list_for_each_entry(sta, &local->sta_list, list) { |
2358 | if (sta->dev == dev && | |
2359 | time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL, | |
2360 | jiffies)) { | |
2361 | active++; | |
2362 | break; | |
2363 | } | |
2364 | } | |
be8755e1 | 2365 | read_unlock_bh(&local->sta_lock); |
f0706e82 JB |
2366 | |
2367 | return active; | |
2368 | } | |
2369 | ||
2370 | ||
2371 | static void ieee80211_sta_expire(struct net_device *dev) | |
2372 | { | |
2373 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2374 | struct sta_info *sta, *tmp; | |
be8755e1 | 2375 | LIST_HEAD(tmp_list); |
0795af57 | 2376 | DECLARE_MAC_BUF(mac); |
f0706e82 | 2377 | |
be8755e1 | 2378 | write_lock_bh(&local->sta_lock); |
f0706e82 JB |
2379 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) |
2380 | if (time_after(jiffies, sta->last_rx + | |
2381 | IEEE80211_IBSS_INACTIVITY_LIMIT)) { | |
0795af57 JP |
2382 | printk(KERN_DEBUG "%s: expiring inactive STA %s\n", |
2383 | dev->name, print_mac(mac, sta->addr)); | |
be8755e1 MW |
2384 | __sta_info_get(sta); |
2385 | sta_info_remove(sta); | |
2386 | list_add(&sta->list, &tmp_list); | |
f0706e82 | 2387 | } |
be8755e1 MW |
2388 | write_unlock_bh(&local->sta_lock); |
2389 | ||
2390 | list_for_each_entry_safe(sta, tmp, &tmp_list, list) { | |
2391 | sta_info_free(sta); | |
2392 | sta_info_put(sta); | |
2393 | } | |
f0706e82 JB |
2394 | } |
2395 | ||
2396 | ||
2397 | static void ieee80211_sta_merge_ibss(struct net_device *dev, | |
2398 | struct ieee80211_if_sta *ifsta) | |
2399 | { | |
2400 | mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); | |
2401 | ||
2402 | ieee80211_sta_expire(dev); | |
2403 | if (ieee80211_sta_active_ibss(dev)) | |
2404 | return; | |
2405 | ||
2406 | printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other " | |
2407 | "IBSS networks with same SSID (merge)\n", dev->name); | |
2408 | ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len); | |
2409 | } | |
2410 | ||
2411 | ||
2412 | void ieee80211_sta_timer(unsigned long data) | |
2413 | { | |
2414 | struct ieee80211_sub_if_data *sdata = | |
2415 | (struct ieee80211_sub_if_data *) data; | |
2416 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
2417 | struct ieee80211_local *local = wdev_priv(&sdata->wdev); | |
2418 | ||
2419 | set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); | |
2420 | queue_work(local->hw.workqueue, &ifsta->work); | |
2421 | } | |
2422 | ||
2423 | ||
2424 | void ieee80211_sta_work(struct work_struct *work) | |
2425 | { | |
2426 | struct ieee80211_sub_if_data *sdata = | |
2427 | container_of(work, struct ieee80211_sub_if_data, u.sta.work); | |
2428 | struct net_device *dev = sdata->dev; | |
2429 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2430 | struct ieee80211_if_sta *ifsta; | |
2431 | struct sk_buff *skb; | |
2432 | ||
2433 | if (!netif_running(dev)) | |
2434 | return; | |
2435 | ||
ece8eddd | 2436 | if (local->sta_sw_scanning || local->sta_hw_scanning) |
f0706e82 JB |
2437 | return; |
2438 | ||
2439 | if (sdata->type != IEEE80211_IF_TYPE_STA && | |
2440 | sdata->type != IEEE80211_IF_TYPE_IBSS) { | |
2441 | printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface " | |
2442 | "(type=%d)\n", dev->name, sdata->type); | |
2443 | return; | |
2444 | } | |
2445 | ifsta = &sdata->u.sta; | |
2446 | ||
2447 | while ((skb = skb_dequeue(&ifsta->skb_queue))) | |
2448 | ieee80211_sta_rx_queued_mgmt(dev, skb); | |
2449 | ||
2450 | if (ifsta->state != IEEE80211_AUTHENTICATE && | |
2451 | ifsta->state != IEEE80211_ASSOCIATE && | |
2452 | test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) { | |
a0af5f14 HS |
2453 | if (ifsta->scan_ssid_len) |
2454 | ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len); | |
2455 | else | |
2456 | ieee80211_sta_start_scan(dev, NULL, 0); | |
f0706e82 JB |
2457 | return; |
2458 | } | |
2459 | ||
2460 | if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) { | |
2461 | if (ieee80211_sta_config_auth(dev, ifsta)) | |
2462 | return; | |
2463 | clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); | |
2464 | } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request)) | |
2465 | return; | |
2466 | ||
2467 | switch (ifsta->state) { | |
2468 | case IEEE80211_DISABLED: | |
2469 | break; | |
2470 | case IEEE80211_AUTHENTICATE: | |
2471 | ieee80211_authenticate(dev, ifsta); | |
2472 | break; | |
2473 | case IEEE80211_ASSOCIATE: | |
2474 | ieee80211_associate(dev, ifsta); | |
2475 | break; | |
2476 | case IEEE80211_ASSOCIATED: | |
2477 | ieee80211_associated(dev, ifsta); | |
2478 | break; | |
2479 | case IEEE80211_IBSS_SEARCH: | |
2480 | ieee80211_sta_find_ibss(dev, ifsta); | |
2481 | break; | |
2482 | case IEEE80211_IBSS_JOINED: | |
2483 | ieee80211_sta_merge_ibss(dev, ifsta); | |
2484 | break; | |
2485 | default: | |
2486 | printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n", | |
2487 | ifsta->state); | |
2488 | break; | |
2489 | } | |
2490 | ||
2491 | if (ieee80211_privacy_mismatch(dev, ifsta)) { | |
2492 | printk(KERN_DEBUG "%s: privacy configuration mismatch and " | |
2493 | "mixed-cell disabled - disassociate\n", dev->name); | |
2494 | ||
2495 | ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED); | |
2496 | ieee80211_set_disassoc(dev, ifsta, 0); | |
2497 | } | |
2498 | } | |
2499 | ||
2500 | ||
2501 | static void ieee80211_sta_reset_auth(struct net_device *dev, | |
2502 | struct ieee80211_if_sta *ifsta) | |
2503 | { | |
2504 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2505 | ||
2506 | if (local->ops->reset_tsf) { | |
2507 | /* Reset own TSF to allow time synchronization work. */ | |
2508 | local->ops->reset_tsf(local_to_hw(local)); | |
2509 | } | |
2510 | ||
2511 | ifsta->wmm_last_param_set = -1; /* allow any WMM update */ | |
2512 | ||
2513 | ||
2514 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
2515 | ifsta->auth_alg = WLAN_AUTH_OPEN; | |
2516 | else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
2517 | ifsta->auth_alg = WLAN_AUTH_SHARED_KEY; | |
2518 | else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
2519 | ifsta->auth_alg = WLAN_AUTH_LEAP; | |
2520 | else | |
2521 | ifsta->auth_alg = WLAN_AUTH_OPEN; | |
2522 | printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name, | |
2523 | ifsta->auth_alg); | |
2524 | ifsta->auth_transaction = -1; | |
d6f2da5b JS |
2525 | ifsta->flags &= ~IEEE80211_STA_ASSOCIATED; |
2526 | ifsta->auth_tries = ifsta->assoc_tries = 0; | |
f0706e82 JB |
2527 | netif_carrier_off(dev); |
2528 | } | |
2529 | ||
2530 | ||
2531 | void ieee80211_sta_req_auth(struct net_device *dev, | |
2532 | struct ieee80211_if_sta *ifsta) | |
2533 | { | |
2534 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2535 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2536 | ||
2537 | if (sdata->type != IEEE80211_IF_TYPE_STA) | |
2538 | return; | |
2539 | ||
d6f2da5b JS |
2540 | if ((ifsta->flags & (IEEE80211_STA_BSSID_SET | |
2541 | IEEE80211_STA_AUTO_BSSID_SEL)) && | |
2542 | (ifsta->flags & (IEEE80211_STA_SSID_SET | | |
2543 | IEEE80211_STA_AUTO_SSID_SEL))) { | |
f0706e82 JB |
2544 | set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); |
2545 | queue_work(local->hw.workqueue, &ifsta->work); | |
2546 | } | |
2547 | } | |
2548 | ||
2549 | static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta, | |
2550 | const char *ssid, int ssid_len) | |
2551 | { | |
2552 | int tmp, hidden_ssid; | |
2553 | ||
48225709 MW |
2554 | if (ssid_len == ifsta->ssid_len && |
2555 | !memcmp(ifsta->ssid, ssid, ssid_len)) | |
f0706e82 JB |
2556 | return 1; |
2557 | ||
d6f2da5b | 2558 | if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) |
f0706e82 JB |
2559 | return 0; |
2560 | ||
2561 | hidden_ssid = 1; | |
2562 | tmp = ssid_len; | |
2563 | while (tmp--) { | |
2564 | if (ssid[tmp] != '\0') { | |
2565 | hidden_ssid = 0; | |
2566 | break; | |
2567 | } | |
2568 | } | |
2569 | ||
2570 | if (hidden_ssid && ifsta->ssid_len == ssid_len) | |
2571 | return 1; | |
2572 | ||
2573 | if (ssid_len == 1 && ssid[0] == ' ') | |
2574 | return 1; | |
2575 | ||
2576 | return 0; | |
2577 | } | |
2578 | ||
2579 | static int ieee80211_sta_config_auth(struct net_device *dev, | |
2580 | struct ieee80211_if_sta *ifsta) | |
2581 | { | |
2582 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2583 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2584 | struct ieee80211_sta_bss *bss, *selected = NULL; | |
2585 | int top_rssi = 0, freq; | |
2586 | ||
d6f2da5b JS |
2587 | if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL | |
2588 | IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) { | |
f0706e82 | 2589 | ifsta->state = IEEE80211_AUTHENTICATE; |
f0706e82 JB |
2590 | ieee80211_sta_reset_auth(dev, ifsta); |
2591 | return 0; | |
2592 | } | |
2593 | ||
2594 | spin_lock_bh(&local->sta_bss_lock); | |
2595 | freq = local->oper_channel->freq; | |
2596 | list_for_each_entry(bss, &local->sta_bss_list, list) { | |
2597 | if (!(bss->capability & WLAN_CAPABILITY_ESS)) | |
2598 | continue; | |
2599 | ||
2600 | if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^ | |
2601 | !!sdata->default_key) | |
2602 | continue; | |
2603 | ||
d6f2da5b JS |
2604 | if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) && |
2605 | bss->freq != freq) | |
f0706e82 JB |
2606 | continue; |
2607 | ||
d6f2da5b | 2608 | if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) && |
f0706e82 JB |
2609 | memcmp(bss->bssid, ifsta->bssid, ETH_ALEN)) |
2610 | continue; | |
2611 | ||
d6f2da5b | 2612 | if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) && |
f0706e82 JB |
2613 | !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len)) |
2614 | continue; | |
2615 | ||
2616 | if (!selected || top_rssi < bss->rssi) { | |
2617 | selected = bss; | |
2618 | top_rssi = bss->rssi; | |
2619 | } | |
2620 | } | |
2621 | if (selected) | |
2622 | atomic_inc(&selected->users); | |
2623 | spin_unlock_bh(&local->sta_bss_lock); | |
2624 | ||
2625 | if (selected) { | |
2626 | ieee80211_set_channel(local, -1, selected->freq); | |
d6f2da5b | 2627 | if (!(ifsta->flags & IEEE80211_STA_SSID_SET)) |
f0706e82 JB |
2628 | ieee80211_sta_set_ssid(dev, selected->ssid, |
2629 | selected->ssid_len); | |
2630 | ieee80211_sta_set_bssid(dev, selected->bssid); | |
2631 | ieee80211_rx_bss_put(dev, selected); | |
2632 | ifsta->state = IEEE80211_AUTHENTICATE; | |
f0706e82 JB |
2633 | ieee80211_sta_reset_auth(dev, ifsta); |
2634 | return 0; | |
2635 | } else { | |
2636 | if (ifsta->state != IEEE80211_AUTHENTICATE) { | |
d6f2da5b | 2637 | if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) |
b9bf1e60 JL |
2638 | ieee80211_sta_start_scan(dev, NULL, 0); |
2639 | else | |
2640 | ieee80211_sta_start_scan(dev, ifsta->ssid, | |
2641 | ifsta->ssid_len); | |
f0706e82 JB |
2642 | ifsta->state = IEEE80211_AUTHENTICATE; |
2643 | set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); | |
2644 | } else | |
2645 | ifsta->state = IEEE80211_DISABLED; | |
2646 | } | |
f0706e82 JB |
2647 | return -1; |
2648 | } | |
2649 | ||
2650 | static int ieee80211_sta_join_ibss(struct net_device *dev, | |
2651 | struct ieee80211_if_sta *ifsta, | |
2652 | struct ieee80211_sta_bss *bss) | |
2653 | { | |
2654 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2655 | int res, rates, i, j; | |
2656 | struct sk_buff *skb; | |
2657 | struct ieee80211_mgmt *mgmt; | |
2658 | struct ieee80211_tx_control control; | |
f0706e82 | 2659 | struct ieee80211_hw_mode *mode; |
1abbe498 | 2660 | struct rate_selection ratesel; |
f0706e82 JB |
2661 | u8 *pos; |
2662 | struct ieee80211_sub_if_data *sdata; | |
2663 | ||
2664 | /* Remove possible STA entries from other IBSS networks. */ | |
2665 | sta_info_flush(local, NULL); | |
2666 | ||
2667 | if (local->ops->reset_tsf) { | |
2668 | /* Reset own TSF to allow time synchronization work. */ | |
2669 | local->ops->reset_tsf(local_to_hw(local)); | |
2670 | } | |
2671 | memcpy(ifsta->bssid, bss->bssid, ETH_ALEN); | |
2672 | res = ieee80211_if_config(dev); | |
2673 | if (res) | |
2674 | return res; | |
2675 | ||
2676 | local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10; | |
2677 | ||
2678 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2679 | sdata->drop_unencrypted = bss->capability & | |
2680 | WLAN_CAPABILITY_PRIVACY ? 1 : 0; | |
2681 | ||
2682 | res = ieee80211_set_channel(local, -1, bss->freq); | |
2683 | ||
2684 | if (!(local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)) { | |
2685 | printk(KERN_DEBUG "%s: IBSS not allowed on channel %d " | |
2686 | "(%d MHz)\n", dev->name, local->hw.conf.channel, | |
2687 | local->hw.conf.freq); | |
2688 | return -1; | |
2689 | } | |
2690 | ||
2691 | /* Set beacon template based on scan results */ | |
2692 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400); | |
2693 | do { | |
2694 | if (!skb) | |
2695 | break; | |
2696 | ||
2697 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2698 | ||
2699 | mgmt = (struct ieee80211_mgmt *) | |
2700 | skb_put(skb, 24 + sizeof(mgmt->u.beacon)); | |
2701 | memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon)); | |
2702 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
2703 | IEEE80211_STYPE_BEACON); | |
2704 | memset(mgmt->da, 0xff, ETH_ALEN); | |
2705 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
2706 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
2707 | mgmt->u.beacon.beacon_int = | |
2708 | cpu_to_le16(local->hw.conf.beacon_int); | |
2709 | mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability); | |
2710 | ||
2711 | pos = skb_put(skb, 2 + ifsta->ssid_len); | |
2712 | *pos++ = WLAN_EID_SSID; | |
2713 | *pos++ = ifsta->ssid_len; | |
2714 | memcpy(pos, ifsta->ssid, ifsta->ssid_len); | |
2715 | ||
2716 | rates = bss->supp_rates_len; | |
2717 | if (rates > 8) | |
2718 | rates = 8; | |
2719 | pos = skb_put(skb, 2 + rates); | |
2720 | *pos++ = WLAN_EID_SUPP_RATES; | |
2721 | *pos++ = rates; | |
2722 | memcpy(pos, bss->supp_rates, rates); | |
2723 | ||
2724 | pos = skb_put(skb, 2 + 1); | |
2725 | *pos++ = WLAN_EID_DS_PARAMS; | |
2726 | *pos++ = 1; | |
2727 | *pos++ = bss->channel; | |
2728 | ||
2729 | pos = skb_put(skb, 2 + 2); | |
2730 | *pos++ = WLAN_EID_IBSS_PARAMS; | |
2731 | *pos++ = 2; | |
2732 | /* FIX: set ATIM window based on scan results */ | |
2733 | *pos++ = 0; | |
2734 | *pos++ = 0; | |
2735 | ||
2736 | if (bss->supp_rates_len > 8) { | |
2737 | rates = bss->supp_rates_len - 8; | |
2738 | pos = skb_put(skb, 2 + rates); | |
2739 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
2740 | *pos++ = rates; | |
2741 | memcpy(pos, &bss->supp_rates[8], rates); | |
2742 | } | |
2743 | ||
2744 | memset(&control, 0, sizeof(control)); | |
1abbe498 MN |
2745 | rate_control_get_rate(dev, local->oper_hw_mode, skb, &ratesel); |
2746 | if (!ratesel.rate) { | |
f0706e82 JB |
2747 | printk(KERN_DEBUG "%s: Failed to determine TX rate " |
2748 | "for IBSS beacon\n", dev->name); | |
2749 | break; | |
2750 | } | |
13262ffd JS |
2751 | control.tx_rate = |
2752 | ((sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE) && | |
1abbe498 MN |
2753 | (ratesel.rate->flags & IEEE80211_RATE_PREAMBLE2)) ? |
2754 | ratesel.rate->val2 : ratesel.rate->val; | |
f0706e82 JB |
2755 | control.antenna_sel_tx = local->hw.conf.antenna_sel_tx; |
2756 | control.power_level = local->hw.conf.power_level; | |
2757 | control.flags |= IEEE80211_TXCTL_NO_ACK; | |
2758 | control.retry_limit = 1; | |
2759 | ||
2760 | ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC); | |
2761 | if (ifsta->probe_resp) { | |
2762 | mgmt = (struct ieee80211_mgmt *) | |
2763 | ifsta->probe_resp->data; | |
2764 | mgmt->frame_control = | |
2765 | IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
2766 | IEEE80211_STYPE_PROBE_RESP); | |
2767 | } else { | |
2768 | printk(KERN_DEBUG "%s: Could not allocate ProbeResp " | |
2769 | "template for IBSS\n", dev->name); | |
2770 | } | |
2771 | ||
2772 | if (local->ops->beacon_update && | |
2773 | local->ops->beacon_update(local_to_hw(local), | |
2774 | skb, &control) == 0) { | |
2775 | printk(KERN_DEBUG "%s: Configured IBSS beacon " | |
2776 | "template based on scan results\n", dev->name); | |
2777 | skb = NULL; | |
2778 | } | |
2779 | ||
2780 | rates = 0; | |
2781 | mode = local->oper_hw_mode; | |
2782 | for (i = 0; i < bss->supp_rates_len; i++) { | |
2783 | int bitrate = (bss->supp_rates[i] & 0x7f) * 5; | |
f0706e82 JB |
2784 | for (j = 0; j < mode->num_rates; j++) |
2785 | if (mode->rates[j].rate == bitrate) | |
2786 | rates |= BIT(j); | |
2787 | } | |
2788 | ifsta->supp_rates_bits = rates; | |
2789 | } while (0); | |
2790 | ||
2791 | if (skb) { | |
2792 | printk(KERN_DEBUG "%s: Failed to configure IBSS beacon " | |
2793 | "template\n", dev->name); | |
2794 | dev_kfree_skb(skb); | |
2795 | } | |
2796 | ||
2797 | ifsta->state = IEEE80211_IBSS_JOINED; | |
2798 | mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); | |
2799 | ||
2800 | ieee80211_rx_bss_put(dev, bss); | |
2801 | ||
2802 | return res; | |
2803 | } | |
2804 | ||
2805 | ||
2806 | static int ieee80211_sta_create_ibss(struct net_device *dev, | |
2807 | struct ieee80211_if_sta *ifsta) | |
2808 | { | |
2809 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2810 | struct ieee80211_sta_bss *bss; | |
cffdd30d | 2811 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
f0706e82 JB |
2812 | struct ieee80211_hw_mode *mode; |
2813 | u8 bssid[ETH_ALEN], *pos; | |
2814 | int i; | |
0795af57 | 2815 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
2816 | |
2817 | #if 0 | |
2818 | /* Easier testing, use fixed BSSID. */ | |
2819 | memset(bssid, 0xfe, ETH_ALEN); | |
2820 | #else | |
2821 | /* Generate random, not broadcast, locally administered BSSID. Mix in | |
2822 | * own MAC address to make sure that devices that do not have proper | |
2823 | * random number generator get different BSSID. */ | |
2824 | get_random_bytes(bssid, ETH_ALEN); | |
2825 | for (i = 0; i < ETH_ALEN; i++) | |
2826 | bssid[i] ^= dev->dev_addr[i]; | |
2827 | bssid[0] &= ~0x01; | |
2828 | bssid[0] |= 0x02; | |
2829 | #endif | |
2830 | ||
0795af57 JP |
2831 | printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n", |
2832 | dev->name, print_mac(mac, bssid)); | |
f0706e82 | 2833 | |
cffdd30d JL |
2834 | bss = ieee80211_rx_bss_add(dev, bssid, local->hw.conf.channel, |
2835 | sdata->u.sta.ssid, sdata->u.sta.ssid_len); | |
f0706e82 JB |
2836 | if (!bss) |
2837 | return -ENOMEM; | |
2838 | ||
f0706e82 JB |
2839 | mode = local->oper_hw_mode; |
2840 | ||
2841 | if (local->hw.conf.beacon_int == 0) | |
2842 | local->hw.conf.beacon_int = 100; | |
2843 | bss->beacon_int = local->hw.conf.beacon_int; | |
2844 | bss->hw_mode = local->hw.conf.phymode; | |
f0706e82 JB |
2845 | bss->freq = local->hw.conf.freq; |
2846 | bss->last_update = jiffies; | |
2847 | bss->capability = WLAN_CAPABILITY_IBSS; | |
2848 | if (sdata->default_key) { | |
2849 | bss->capability |= WLAN_CAPABILITY_PRIVACY; | |
2850 | } else | |
2851 | sdata->drop_unencrypted = 0; | |
2852 | bss->supp_rates_len = mode->num_rates; | |
2853 | pos = bss->supp_rates; | |
2854 | for (i = 0; i < mode->num_rates; i++) { | |
2855 | int rate = mode->rates[i].rate; | |
f0706e82 JB |
2856 | *pos++ = (u8) (rate / 5); |
2857 | } | |
2858 | ||
2859 | return ieee80211_sta_join_ibss(dev, ifsta, bss); | |
2860 | } | |
2861 | ||
2862 | ||
2863 | static int ieee80211_sta_find_ibss(struct net_device *dev, | |
2864 | struct ieee80211_if_sta *ifsta) | |
2865 | { | |
2866 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2867 | struct ieee80211_sta_bss *bss; | |
2868 | int found = 0; | |
2869 | u8 bssid[ETH_ALEN]; | |
2870 | int active_ibss; | |
0795af57 JP |
2871 | DECLARE_MAC_BUF(mac); |
2872 | DECLARE_MAC_BUF(mac2); | |
f0706e82 JB |
2873 | |
2874 | if (ifsta->ssid_len == 0) | |
2875 | return -EINVAL; | |
2876 | ||
2877 | active_ibss = ieee80211_sta_active_ibss(dev); | |
2878 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
2879 | printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n", | |
2880 | dev->name, active_ibss); | |
2881 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
2882 | spin_lock_bh(&local->sta_bss_lock); | |
2883 | list_for_each_entry(bss, &local->sta_bss_list, list) { | |
2884 | if (ifsta->ssid_len != bss->ssid_len || | |
2885 | memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0 | |
2886 | || !(bss->capability & WLAN_CAPABILITY_IBSS)) | |
2887 | continue; | |
2888 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0795af57 JP |
2889 | printk(KERN_DEBUG " bssid=%s found\n", |
2890 | print_mac(mac, bss->bssid)); | |
f0706e82 JB |
2891 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
2892 | memcpy(bssid, bss->bssid, ETH_ALEN); | |
2893 | found = 1; | |
2894 | if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0) | |
2895 | break; | |
2896 | } | |
2897 | spin_unlock_bh(&local->sta_bss_lock); | |
2898 | ||
2899 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0795af57 JP |
2900 | printk(KERN_DEBUG " sta_find_ibss: selected %s current " |
2901 | "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid)); | |
f0706e82 JB |
2902 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
2903 | if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 && | |
cffdd30d JL |
2904 | (bss = ieee80211_rx_bss_get(dev, bssid, local->hw.conf.channel, |
2905 | ifsta->ssid, ifsta->ssid_len))) { | |
0795af57 | 2906 | printk(KERN_DEBUG "%s: Selected IBSS BSSID %s" |
f0706e82 | 2907 | " based on configured SSID\n", |
0795af57 | 2908 | dev->name, print_mac(mac, bssid)); |
f0706e82 JB |
2909 | return ieee80211_sta_join_ibss(dev, ifsta, bss); |
2910 | } | |
2911 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
2912 | printk(KERN_DEBUG " did not try to join ibss\n"); | |
2913 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
2914 | ||
2915 | /* Selected IBSS not found in current scan results - try to scan */ | |
2916 | if (ifsta->state == IEEE80211_IBSS_JOINED && | |
2917 | !ieee80211_sta_active_ibss(dev)) { | |
2918 | mod_timer(&ifsta->timer, jiffies + | |
2919 | IEEE80211_IBSS_MERGE_INTERVAL); | |
2920 | } else if (time_after(jiffies, local->last_scan_completed + | |
2921 | IEEE80211_SCAN_INTERVAL)) { | |
2922 | printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to " | |
2923 | "join\n", dev->name); | |
2924 | return ieee80211_sta_req_scan(dev, ifsta->ssid, | |
2925 | ifsta->ssid_len); | |
2926 | } else if (ifsta->state != IEEE80211_IBSS_JOINED) { | |
2927 | int interval = IEEE80211_SCAN_INTERVAL; | |
2928 | ||
2929 | if (time_after(jiffies, ifsta->ibss_join_req + | |
2930 | IEEE80211_IBSS_JOIN_TIMEOUT)) { | |
d6f2da5b | 2931 | if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) && |
f0706e82 JB |
2932 | local->oper_channel->flag & IEEE80211_CHAN_W_IBSS) |
2933 | return ieee80211_sta_create_ibss(dev, ifsta); | |
d6f2da5b | 2934 | if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) { |
f0706e82 JB |
2935 | printk(KERN_DEBUG "%s: IBSS not allowed on the" |
2936 | " configured channel %d (%d MHz)\n", | |
2937 | dev->name, local->hw.conf.channel, | |
2938 | local->hw.conf.freq); | |
2939 | } | |
2940 | ||
2941 | /* No IBSS found - decrease scan interval and continue | |
2942 | * scanning. */ | |
2943 | interval = IEEE80211_SCAN_INTERVAL_SLOW; | |
2944 | } | |
2945 | ||
2946 | ifsta->state = IEEE80211_IBSS_SEARCH; | |
2947 | mod_timer(&ifsta->timer, jiffies + interval); | |
2948 | return 0; | |
2949 | } | |
2950 | ||
2951 | return 0; | |
2952 | } | |
2953 | ||
2954 | ||
2955 | int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len) | |
2956 | { | |
2957 | struct ieee80211_sub_if_data *sdata; | |
2958 | struct ieee80211_if_sta *ifsta; | |
2959 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2960 | ||
2961 | if (len > IEEE80211_MAX_SSID_LEN) | |
2962 | return -EINVAL; | |
2963 | ||
2964 | /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is | |
2965 | * not defined. */ | |
2966 | if (local->ops->conf_tx) { | |
2967 | struct ieee80211_tx_queue_params qparam; | |
2968 | int i; | |
2969 | ||
2970 | memset(&qparam, 0, sizeof(qparam)); | |
2971 | /* TODO: are these ok defaults for all hw_modes? */ | |
2972 | qparam.aifs = 2; | |
2973 | qparam.cw_min = | |
2974 | local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15; | |
2975 | qparam.cw_max = 1023; | |
2976 | qparam.burst_time = 0; | |
2977 | for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++) | |
2978 | { | |
2979 | local->ops->conf_tx(local_to_hw(local), | |
2980 | i + IEEE80211_TX_QUEUE_DATA0, | |
2981 | &qparam); | |
2982 | } | |
2983 | /* IBSS uses different parameters for Beacon sending */ | |
2984 | qparam.cw_min++; | |
2985 | qparam.cw_min *= 2; | |
2986 | qparam.cw_min--; | |
2987 | local->ops->conf_tx(local_to_hw(local), | |
2988 | IEEE80211_TX_QUEUE_BEACON, &qparam); | |
2989 | } | |
2990 | ||
2991 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2992 | ifsta = &sdata->u.sta; | |
2993 | ||
2994 | if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) | |
d6f2da5b | 2995 | ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
f0706e82 JB |
2996 | memcpy(ifsta->ssid, ssid, len); |
2997 | memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len); | |
2998 | ifsta->ssid_len = len; | |
2999 | ||
d6f2da5b JS |
3000 | if (len) |
3001 | ifsta->flags |= IEEE80211_STA_SSID_SET; | |
3002 | else | |
3003 | ifsta->flags &= ~IEEE80211_STA_SSID_SET; | |
3004 | if (sdata->type == IEEE80211_IF_TYPE_IBSS && | |
3005 | !(ifsta->flags & IEEE80211_STA_BSSID_SET)) { | |
f0706e82 JB |
3006 | ifsta->ibss_join_req = jiffies; |
3007 | ifsta->state = IEEE80211_IBSS_SEARCH; | |
3008 | return ieee80211_sta_find_ibss(dev, ifsta); | |
3009 | } | |
3010 | return 0; | |
3011 | } | |
3012 | ||
3013 | ||
3014 | int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len) | |
3015 | { | |
3016 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3017 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
3018 | memcpy(ssid, ifsta->ssid, ifsta->ssid_len); | |
3019 | *len = ifsta->ssid_len; | |
3020 | return 0; | |
3021 | } | |
3022 | ||
3023 | ||
3024 | int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid) | |
3025 | { | |
3026 | struct ieee80211_sub_if_data *sdata; | |
3027 | struct ieee80211_if_sta *ifsta; | |
3028 | int res; | |
3029 | ||
3030 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3031 | ifsta = &sdata->u.sta; | |
3032 | ||
3033 | if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) { | |
3034 | memcpy(ifsta->bssid, bssid, ETH_ALEN); | |
3035 | res = ieee80211_if_config(dev); | |
3036 | if (res) { | |
3037 | printk(KERN_DEBUG "%s: Failed to config new BSSID to " | |
3038 | "the low-level driver\n", dev->name); | |
3039 | return res; | |
3040 | } | |
3041 | } | |
3042 | ||
d6f2da5b JS |
3043 | if (is_valid_ether_addr(bssid)) |
3044 | ifsta->flags |= IEEE80211_STA_BSSID_SET; | |
f0706e82 | 3045 | else |
d6f2da5b JS |
3046 | ifsta->flags &= ~IEEE80211_STA_BSSID_SET; |
3047 | ||
f0706e82 JB |
3048 | return 0; |
3049 | } | |
3050 | ||
3051 | ||
3052 | static void ieee80211_send_nullfunc(struct ieee80211_local *local, | |
3053 | struct ieee80211_sub_if_data *sdata, | |
3054 | int powersave) | |
3055 | { | |
3056 | struct sk_buff *skb; | |
3057 | struct ieee80211_hdr *nullfunc; | |
3058 | u16 fc; | |
3059 | ||
3060 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24); | |
3061 | if (!skb) { | |
3062 | printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc " | |
3063 | "frame\n", sdata->dev->name); | |
3064 | return; | |
3065 | } | |
3066 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
3067 | ||
3068 | nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24); | |
3069 | memset(nullfunc, 0, 24); | |
3070 | fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | | |
3071 | IEEE80211_FCTL_TODS; | |
3072 | if (powersave) | |
3073 | fc |= IEEE80211_FCTL_PM; | |
3074 | nullfunc->frame_control = cpu_to_le16(fc); | |
3075 | memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN); | |
3076 | memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN); | |
3077 | memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN); | |
3078 | ||
3079 | ieee80211_sta_tx(sdata->dev, skb, 0); | |
3080 | } | |
3081 | ||
3082 | ||
3083 | void ieee80211_scan_completed(struct ieee80211_hw *hw) | |
3084 | { | |
3085 | struct ieee80211_local *local = hw_to_local(hw); | |
3086 | struct net_device *dev = local->scan_dev; | |
3087 | struct ieee80211_sub_if_data *sdata; | |
3088 | union iwreq_data wrqu; | |
3089 | ||
3090 | local->last_scan_completed = jiffies; | |
ece8eddd ZY |
3091 | memset(&wrqu, 0, sizeof(wrqu)); |
3092 | wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL); | |
f0706e82 | 3093 | |
ece8eddd ZY |
3094 | if (local->sta_hw_scanning) { |
3095 | local->sta_hw_scanning = 0; | |
3096 | goto done; | |
3097 | } | |
3098 | ||
3099 | local->sta_sw_scanning = 0; | |
f0706e82 | 3100 | if (ieee80211_hw_config(local)) |
4b50e388 | 3101 | printk(KERN_DEBUG "%s: failed to restore operational " |
f0706e82 JB |
3102 | "channel after scan\n", dev->name); |
3103 | ||
4150c572 JB |
3104 | |
3105 | netif_tx_lock_bh(local->mdev); | |
3106 | local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC; | |
3107 | local->ops->configure_filter(local_to_hw(local), | |
3108 | FIF_BCN_PRBRESP_PROMISC, | |
3109 | &local->filter_flags, | |
3110 | local->mdev->mc_count, | |
3111 | local->mdev->mc_list); | |
3112 | ||
3113 | netif_tx_unlock_bh(local->mdev); | |
f0706e82 | 3114 | |
79010420 JB |
3115 | rcu_read_lock(); |
3116 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
14042cbe MN |
3117 | |
3118 | /* No need to wake the master device. */ | |
3119 | if (sdata->dev == local->mdev) | |
3120 | continue; | |
3121 | ||
f0706e82 | 3122 | if (sdata->type == IEEE80211_IF_TYPE_STA) { |
d6f2da5b | 3123 | if (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED) |
f0706e82 JB |
3124 | ieee80211_send_nullfunc(local, sdata, 0); |
3125 | ieee80211_sta_timer((unsigned long)sdata); | |
3126 | } | |
14042cbe | 3127 | |
f0706e82 JB |
3128 | netif_wake_queue(sdata->dev); |
3129 | } | |
79010420 | 3130 | rcu_read_unlock(); |
f0706e82 | 3131 | |
ece8eddd | 3132 | done: |
f0706e82 JB |
3133 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
3134 | if (sdata->type == IEEE80211_IF_TYPE_IBSS) { | |
3135 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
d6f2da5b | 3136 | if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) || |
f0706e82 JB |
3137 | (!ifsta->state == IEEE80211_IBSS_JOINED && |
3138 | !ieee80211_sta_active_ibss(dev))) | |
3139 | ieee80211_sta_find_ibss(dev, ifsta); | |
3140 | } | |
3141 | } | |
3142 | EXPORT_SYMBOL(ieee80211_scan_completed); | |
3143 | ||
3144 | void ieee80211_sta_scan_work(struct work_struct *work) | |
3145 | { | |
3146 | struct ieee80211_local *local = | |
3147 | container_of(work, struct ieee80211_local, scan_work.work); | |
3148 | struct net_device *dev = local->scan_dev; | |
3149 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3150 | struct ieee80211_hw_mode *mode; | |
3151 | struct ieee80211_channel *chan; | |
3152 | int skip; | |
3153 | unsigned long next_delay = 0; | |
3154 | ||
ece8eddd | 3155 | if (!local->sta_sw_scanning) |
f0706e82 JB |
3156 | return; |
3157 | ||
3158 | switch (local->scan_state) { | |
3159 | case SCAN_SET_CHANNEL: | |
3160 | mode = local->scan_hw_mode; | |
3161 | if (local->scan_hw_mode->list.next == &local->modes_list && | |
3162 | local->scan_channel_idx >= mode->num_channels) { | |
3163 | ieee80211_scan_completed(local_to_hw(local)); | |
3164 | return; | |
3165 | } | |
3166 | skip = !(local->enabled_modes & (1 << mode->mode)); | |
3167 | chan = &mode->channels[local->scan_channel_idx]; | |
3168 | if (!(chan->flag & IEEE80211_CHAN_W_SCAN) || | |
3169 | (sdata->type == IEEE80211_IF_TYPE_IBSS && | |
3170 | !(chan->flag & IEEE80211_CHAN_W_IBSS)) || | |
3171 | (local->hw_modes & local->enabled_modes & | |
3172 | (1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B)) | |
3173 | skip = 1; | |
3174 | ||
3175 | if (!skip) { | |
3176 | #if 0 | |
3177 | printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n", | |
3178 | dev->name, chan->chan, chan->freq); | |
3179 | #endif | |
3180 | ||
3181 | local->scan_channel = chan; | |
3182 | if (ieee80211_hw_config(local)) { | |
3183 | printk(KERN_DEBUG "%s: failed to set channel " | |
3184 | "%d (%d MHz) for scan\n", dev->name, | |
3185 | chan->chan, chan->freq); | |
3186 | skip = 1; | |
3187 | } | |
3188 | } | |
3189 | ||
3190 | local->scan_channel_idx++; | |
3191 | if (local->scan_channel_idx >= local->scan_hw_mode->num_channels) { | |
3192 | if (local->scan_hw_mode->list.next != &local->modes_list) { | |
3193 | local->scan_hw_mode = list_entry(local->scan_hw_mode->list.next, | |
3194 | struct ieee80211_hw_mode, | |
3195 | list); | |
3196 | local->scan_channel_idx = 0; | |
3197 | } | |
3198 | } | |
3199 | ||
3200 | if (skip) | |
3201 | break; | |
3202 | ||
3203 | next_delay = IEEE80211_PROBE_DELAY + | |
3204 | usecs_to_jiffies(local->hw.channel_change_time); | |
3205 | local->scan_state = SCAN_SEND_PROBE; | |
3206 | break; | |
3207 | case SCAN_SEND_PROBE: | |
3208 | if (local->scan_channel->flag & IEEE80211_CHAN_W_ACTIVE_SCAN) { | |
3209 | ieee80211_send_probe_req(dev, NULL, local->scan_ssid, | |
3210 | local->scan_ssid_len); | |
3211 | next_delay = IEEE80211_CHANNEL_TIME; | |
3212 | } else | |
3213 | next_delay = IEEE80211_PASSIVE_CHANNEL_TIME; | |
3214 | local->scan_state = SCAN_SET_CHANNEL; | |
3215 | break; | |
3216 | } | |
3217 | ||
ece8eddd | 3218 | if (local->sta_sw_scanning) |
f0706e82 JB |
3219 | queue_delayed_work(local->hw.workqueue, &local->scan_work, |
3220 | next_delay); | |
3221 | } | |
3222 | ||
3223 | ||
3224 | static int ieee80211_sta_start_scan(struct net_device *dev, | |
3225 | u8 *ssid, size_t ssid_len) | |
3226 | { | |
3227 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
3228 | struct ieee80211_sub_if_data *sdata; | |
3229 | ||
3230 | if (ssid_len > IEEE80211_MAX_SSID_LEN) | |
3231 | return -EINVAL; | |
3232 | ||
3233 | /* MLME-SCAN.request (page 118) page 144 (11.1.3.1) | |
3234 | * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS | |
3235 | * BSSID: MACAddress | |
3236 | * SSID | |
3237 | * ScanType: ACTIVE, PASSIVE | |
3238 | * ProbeDelay: delay (in microseconds) to be used prior to transmitting | |
3239 | * a Probe frame during active scanning | |
3240 | * ChannelList | |
3241 | * MinChannelTime (>= ProbeDelay), in TU | |
3242 | * MaxChannelTime: (>= MinChannelTime), in TU | |
3243 | */ | |
3244 | ||
3245 | /* MLME-SCAN.confirm | |
3246 | * BSSDescriptionSet | |
3247 | * ResultCode: SUCCESS, INVALID_PARAMETERS | |
3248 | */ | |
3249 | ||
ece8eddd | 3250 | if (local->sta_sw_scanning || local->sta_hw_scanning) { |
f0706e82 JB |
3251 | if (local->scan_dev == dev) |
3252 | return 0; | |
3253 | return -EBUSY; | |
3254 | } | |
3255 | ||
3256 | if (local->ops->hw_scan) { | |
3257 | int rc = local->ops->hw_scan(local_to_hw(local), | |
ece8eddd | 3258 | ssid, ssid_len); |
f0706e82 | 3259 | if (!rc) { |
ece8eddd | 3260 | local->sta_hw_scanning = 1; |
f0706e82 JB |
3261 | local->scan_dev = dev; |
3262 | } | |
3263 | return rc; | |
3264 | } | |
3265 | ||
ece8eddd | 3266 | local->sta_sw_scanning = 1; |
f0706e82 | 3267 | |
79010420 JB |
3268 | rcu_read_lock(); |
3269 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
14042cbe MN |
3270 | |
3271 | /* Don't stop the master interface, otherwise we can't transmit | |
3272 | * probes! */ | |
3273 | if (sdata->dev == local->mdev) | |
3274 | continue; | |
3275 | ||
f0706e82 JB |
3276 | netif_stop_queue(sdata->dev); |
3277 | if (sdata->type == IEEE80211_IF_TYPE_STA && | |
d6f2da5b | 3278 | (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)) |
f0706e82 JB |
3279 | ieee80211_send_nullfunc(local, sdata, 1); |
3280 | } | |
79010420 | 3281 | rcu_read_unlock(); |
f0706e82 JB |
3282 | |
3283 | if (ssid) { | |
3284 | local->scan_ssid_len = ssid_len; | |
3285 | memcpy(local->scan_ssid, ssid, ssid_len); | |
3286 | } else | |
3287 | local->scan_ssid_len = 0; | |
3288 | local->scan_state = SCAN_SET_CHANNEL; | |
3289 | local->scan_hw_mode = list_entry(local->modes_list.next, | |
3290 | struct ieee80211_hw_mode, | |
3291 | list); | |
3292 | local->scan_channel_idx = 0; | |
3293 | local->scan_dev = dev; | |
3294 | ||
4150c572 JB |
3295 | netif_tx_lock_bh(local->mdev); |
3296 | local->filter_flags |= FIF_BCN_PRBRESP_PROMISC; | |
3297 | local->ops->configure_filter(local_to_hw(local), | |
3298 | FIF_BCN_PRBRESP_PROMISC, | |
3299 | &local->filter_flags, | |
3300 | local->mdev->mc_count, | |
3301 | local->mdev->mc_list); | |
3302 | netif_tx_unlock_bh(local->mdev); | |
f0706e82 JB |
3303 | |
3304 | /* TODO: start scan as soon as all nullfunc frames are ACKed */ | |
3305 | queue_delayed_work(local->hw.workqueue, &local->scan_work, | |
3306 | IEEE80211_CHANNEL_TIME); | |
3307 | ||
3308 | return 0; | |
3309 | } | |
3310 | ||
3311 | ||
3312 | int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len) | |
3313 | { | |
3314 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3315 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
3316 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
3317 | ||
3318 | if (sdata->type != IEEE80211_IF_TYPE_STA) | |
3319 | return ieee80211_sta_start_scan(dev, ssid, ssid_len); | |
3320 | ||
ece8eddd | 3321 | if (local->sta_sw_scanning || local->sta_hw_scanning) { |
f0706e82 JB |
3322 | if (local->scan_dev == dev) |
3323 | return 0; | |
3324 | return -EBUSY; | |
3325 | } | |
3326 | ||
a0af5f14 HS |
3327 | ifsta->scan_ssid_len = ssid_len; |
3328 | if (ssid_len) | |
3329 | memcpy(ifsta->scan_ssid, ssid, ssid_len); | |
f0706e82 JB |
3330 | set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request); |
3331 | queue_work(local->hw.workqueue, &ifsta->work); | |
3332 | return 0; | |
3333 | } | |
3334 | ||
3335 | static char * | |
3336 | ieee80211_sta_scan_result(struct net_device *dev, | |
3337 | struct ieee80211_sta_bss *bss, | |
3338 | char *current_ev, char *end_buf) | |
3339 | { | |
3340 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
3341 | struct iw_event iwe; | |
3342 | ||
3343 | if (time_after(jiffies, | |
3344 | bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE)) | |
3345 | return current_ev; | |
3346 | ||
3347 | if (!(local->enabled_modes & (1 << bss->hw_mode))) | |
3348 | return current_ev; | |
3349 | ||
f0706e82 JB |
3350 | memset(&iwe, 0, sizeof(iwe)); |
3351 | iwe.cmd = SIOCGIWAP; | |
3352 | iwe.u.ap_addr.sa_family = ARPHRD_ETHER; | |
3353 | memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN); | |
3354 | current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, | |
3355 | IW_EV_ADDR_LEN); | |
3356 | ||
3357 | memset(&iwe, 0, sizeof(iwe)); | |
3358 | iwe.cmd = SIOCGIWESSID; | |
3359 | iwe.u.data.length = bss->ssid_len; | |
3360 | iwe.u.data.flags = 1; | |
3361 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, | |
3362 | bss->ssid); | |
3363 | ||
3364 | if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) { | |
3365 | memset(&iwe, 0, sizeof(iwe)); | |
3366 | iwe.cmd = SIOCGIWMODE; | |
3367 | if (bss->capability & WLAN_CAPABILITY_ESS) | |
3368 | iwe.u.mode = IW_MODE_MASTER; | |
3369 | else | |
3370 | iwe.u.mode = IW_MODE_ADHOC; | |
3371 | current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, | |
3372 | IW_EV_UINT_LEN); | |
3373 | } | |
3374 | ||
3375 | memset(&iwe, 0, sizeof(iwe)); | |
3376 | iwe.cmd = SIOCGIWFREQ; | |
3377 | iwe.u.freq.m = bss->channel; | |
3378 | iwe.u.freq.e = 0; | |
3379 | current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, | |
3380 | IW_EV_FREQ_LEN); | |
3381 | iwe.u.freq.m = bss->freq * 100000; | |
3382 | iwe.u.freq.e = 1; | |
3383 | current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, | |
3384 | IW_EV_FREQ_LEN); | |
3385 | ||
3386 | memset(&iwe, 0, sizeof(iwe)); | |
3387 | iwe.cmd = IWEVQUAL; | |
3388 | iwe.u.qual.qual = bss->signal; | |
3389 | iwe.u.qual.level = bss->rssi; | |
3390 | iwe.u.qual.noise = bss->noise; | |
3391 | iwe.u.qual.updated = local->wstats_flags; | |
3392 | current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, | |
3393 | IW_EV_QUAL_LEN); | |
3394 | ||
3395 | memset(&iwe, 0, sizeof(iwe)); | |
3396 | iwe.cmd = SIOCGIWENCODE; | |
3397 | if (bss->capability & WLAN_CAPABILITY_PRIVACY) | |
3398 | iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY; | |
3399 | else | |
3400 | iwe.u.data.flags = IW_ENCODE_DISABLED; | |
3401 | iwe.u.data.length = 0; | |
3402 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, ""); | |
3403 | ||
3404 | if (bss && bss->wpa_ie) { | |
3405 | memset(&iwe, 0, sizeof(iwe)); | |
3406 | iwe.cmd = IWEVGENIE; | |
3407 | iwe.u.data.length = bss->wpa_ie_len; | |
3408 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, | |
3409 | bss->wpa_ie); | |
3410 | } | |
3411 | ||
3412 | if (bss && bss->rsn_ie) { | |
3413 | memset(&iwe, 0, sizeof(iwe)); | |
3414 | iwe.cmd = IWEVGENIE; | |
3415 | iwe.u.data.length = bss->rsn_ie_len; | |
3416 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, | |
3417 | bss->rsn_ie); | |
3418 | } | |
3419 | ||
3420 | if (bss && bss->supp_rates_len > 0) { | |
3421 | /* display all supported rates in readable format */ | |
3422 | char *p = current_ev + IW_EV_LCP_LEN; | |
3423 | int i; | |
3424 | ||
3425 | memset(&iwe, 0, sizeof(iwe)); | |
3426 | iwe.cmd = SIOCGIWRATE; | |
3427 | /* Those two flags are ignored... */ | |
3428 | iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0; | |
3429 | ||
3430 | for (i = 0; i < bss->supp_rates_len; i++) { | |
3431 | iwe.u.bitrate.value = ((bss->supp_rates[i] & | |
3432 | 0x7f) * 500000); | |
3433 | p = iwe_stream_add_value(current_ev, p, | |
3434 | end_buf, &iwe, IW_EV_PARAM_LEN); | |
3435 | } | |
3436 | current_ev = p; | |
3437 | } | |
3438 | ||
3439 | if (bss) { | |
3440 | char *buf; | |
3441 | buf = kmalloc(30, GFP_ATOMIC); | |
3442 | if (buf) { | |
3443 | memset(&iwe, 0, sizeof(iwe)); | |
3444 | iwe.cmd = IWEVCUSTOM; | |
3445 | sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp)); | |
3446 | iwe.u.data.length = strlen(buf); | |
3447 | current_ev = iwe_stream_add_point(current_ev, end_buf, | |
3448 | &iwe, buf); | |
3449 | kfree(buf); | |
3450 | } | |
3451 | } | |
3452 | ||
f0706e82 JB |
3453 | return current_ev; |
3454 | } | |
3455 | ||
3456 | ||
3457 | int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len) | |
3458 | { | |
3459 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
3460 | char *current_ev = buf; | |
3461 | char *end_buf = buf + len; | |
3462 | struct ieee80211_sta_bss *bss; | |
3463 | ||
3464 | spin_lock_bh(&local->sta_bss_lock); | |
3465 | list_for_each_entry(bss, &local->sta_bss_list, list) { | |
3466 | if (buf + len - current_ev <= IW_EV_ADDR_LEN) { | |
3467 | spin_unlock_bh(&local->sta_bss_lock); | |
3468 | return -E2BIG; | |
3469 | } | |
3470 | current_ev = ieee80211_sta_scan_result(dev, bss, current_ev, | |
3471 | end_buf); | |
3472 | } | |
3473 | spin_unlock_bh(&local->sta_bss_lock); | |
3474 | return current_ev - buf; | |
3475 | } | |
3476 | ||
3477 | ||
3478 | int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len) | |
3479 | { | |
3480 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3481 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
3482 | kfree(ifsta->extra_ie); | |
3483 | if (len == 0) { | |
3484 | ifsta->extra_ie = NULL; | |
3485 | ifsta->extra_ie_len = 0; | |
3486 | return 0; | |
3487 | } | |
3488 | ifsta->extra_ie = kmalloc(len, GFP_KERNEL); | |
3489 | if (!ifsta->extra_ie) { | |
3490 | ifsta->extra_ie_len = 0; | |
3491 | return -ENOMEM; | |
3492 | } | |
3493 | memcpy(ifsta->extra_ie, ie, len); | |
3494 | ifsta->extra_ie_len = len; | |
3495 | return 0; | |
3496 | } | |
3497 | ||
3498 | ||
3499 | struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev, | |
3500 | struct sk_buff *skb, u8 *bssid, | |
3501 | u8 *addr) | |
3502 | { | |
3503 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
3504 | struct sta_info *sta; | |
91fa558b | 3505 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
0795af57 | 3506 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
3507 | |
3508 | /* TODO: Could consider removing the least recently used entry and | |
3509 | * allow new one to be added. */ | |
3510 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { | |
3511 | if (net_ratelimit()) { | |
3512 | printk(KERN_DEBUG "%s: No room for a new IBSS STA " | |
0795af57 | 3513 | "entry %s\n", dev->name, print_mac(mac, addr)); |
f0706e82 JB |
3514 | } |
3515 | return NULL; | |
3516 | } | |
3517 | ||
0795af57 | 3518 | printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n", |
dd1cd4c6 | 3519 | wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name); |
f0706e82 JB |
3520 | |
3521 | sta = sta_info_add(local, dev, addr, GFP_ATOMIC); | |
3522 | if (!sta) | |
3523 | return NULL; | |
3524 | ||
3525 | sta->supp_rates = sdata->u.sta.supp_rates_bits; | |
3526 | ||
3527 | rate_control_rate_init(sta, local); | |
3528 | ||
3529 | return sta; /* caller will call sta_info_put() */ | |
3530 | } | |
3531 | ||
3532 | ||
3533 | int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason) | |
3534 | { | |
3535 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3536 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
3537 | ||
3538 | printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n", | |
3539 | dev->name, reason); | |
3540 | ||
3541 | if (sdata->type != IEEE80211_IF_TYPE_STA && | |
3542 | sdata->type != IEEE80211_IF_TYPE_IBSS) | |
3543 | return -EINVAL; | |
3544 | ||
3545 | ieee80211_send_deauth(dev, ifsta, reason); | |
3546 | ieee80211_set_disassoc(dev, ifsta, 1); | |
3547 | return 0; | |
3548 | } | |
3549 | ||
3550 | ||
3551 | int ieee80211_sta_disassociate(struct net_device *dev, u16 reason) | |
3552 | { | |
3553 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3554 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
3555 | ||
3556 | printk(KERN_DEBUG "%s: disassociate(reason=%d)\n", | |
3557 | dev->name, reason); | |
3558 | ||
3559 | if (sdata->type != IEEE80211_IF_TYPE_STA) | |
3560 | return -EINVAL; | |
3561 | ||
d6f2da5b | 3562 | if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED)) |
f0706e82 JB |
3563 | return -1; |
3564 | ||
3565 | ieee80211_send_disassoc(dev, ifsta, reason); | |
3566 | ieee80211_set_disassoc(dev, ifsta, 0); | |
3567 | return 0; | |
3568 | } |