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IEEE 802.11w: Added association ping
[thirdparty/hostap.git] / wpa_supplicant / mlme.c
1 /*
2 * WPA Supplicant - Client mode MLME
3 * Copyright (c) 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright (c) 2004, Instant802 Networks, Inc.
5 * Copyright (c) 2005-2006, Devicescape Software, Inc.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * Alternatively, this software may be distributed under the terms of BSD
12 * license.
13 *
14 * See README and COPYING for more details.
15 */
16
17 #include "includes.h"
18
19 #include "common.h"
20 #include "eloop.h"
21 #include "config_ssid.h"
22 #include "wpa_supplicant_i.h"
23 #include "wpa.h"
24 #include "drivers/driver.h"
25 #include "ieee802_11_defs.h"
26 #include "mlme.h"
27
28
29 /* Timeouts and intervals in milliseconds */
30 #define IEEE80211_AUTH_TIMEOUT (200)
31 #define IEEE80211_AUTH_MAX_TRIES 3
32 #define IEEE80211_ASSOC_TIMEOUT (200)
33 #define IEEE80211_ASSOC_MAX_TRIES 3
34 #define IEEE80211_MONITORING_INTERVAL (2000)
35 #define IEEE80211_PROBE_INTERVAL (60000)
36 #define IEEE80211_RETRY_AUTH_INTERVAL (1000)
37 #define IEEE80211_SCAN_INTERVAL (2000)
38 #define IEEE80211_SCAN_INTERVAL_SLOW (15000)
39 #define IEEE80211_IBSS_JOIN_TIMEOUT (20000)
40
41 #define IEEE80211_PROBE_DELAY (33)
42 #define IEEE80211_CHANNEL_TIME (33)
43 #define IEEE80211_PASSIVE_CHANNEL_TIME (200)
44 #define IEEE80211_SCAN_RESULT_EXPIRE (10000)
45 #define IEEE80211_IBSS_MERGE_INTERVAL (30000)
46 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60000)
47
48 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
49
50
51 #define IEEE80211_FC(type, stype) host_to_le16((type << 2) | (stype << 4))
52
53
54 struct ieee80211_sta_bss {
55 struct ieee80211_sta_bss *next;
56 struct ieee80211_sta_bss *hnext;
57
58 u8 bssid[ETH_ALEN];
59 u8 ssid[MAX_SSID_LEN];
60 size_t ssid_len;
61 u16 capability; /* host byte order */
62 int hw_mode;
63 int channel;
64 int freq;
65 int rssi;
66 u8 *ie;
67 size_t ie_len;
68 u8 *wpa_ie;
69 size_t wpa_ie_len;
70 u8 *rsn_ie;
71 size_t rsn_ie_len;
72 u8 *wmm_ie;
73 size_t wmm_ie_len;
74 u8 *mdie;
75 size_t mdie_len;
76 #define IEEE80211_MAX_SUPP_RATES 32
77 u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
78 size_t supp_rates_len;
79 int beacon_int;
80 u64 timestamp;
81
82 int probe_resp;
83 struct os_time last_update;
84 };
85
86
87 static void ieee80211_send_probe_req(struct wpa_supplicant *wpa_s,
88 const u8 *dst,
89 const u8 *ssid, size_t ssid_len);
90 static struct ieee80211_sta_bss *
91 ieee80211_bss_get(struct wpa_supplicant *wpa_s, const u8 *bssid);
92 static int ieee80211_sta_find_ibss(struct wpa_supplicant *wpa_s);
93 static int ieee80211_sta_wep_configured(struct wpa_supplicant *wpa_s);
94 static void ieee80211_sta_timer(void *eloop_ctx, void *timeout_ctx);
95 static void ieee80211_sta_scan_timer(void *eloop_ctx, void *timeout_ctx);
96
97
98 /* Parsed Information Elements */
99 struct ieee802_11_elems {
100 u8 *ssid;
101 u8 ssid_len;
102 u8 *supp_rates;
103 u8 supp_rates_len;
104 u8 *fh_params;
105 u8 fh_params_len;
106 u8 *ds_params;
107 u8 ds_params_len;
108 u8 *cf_params;
109 u8 cf_params_len;
110 u8 *tim;
111 u8 tim_len;
112 u8 *ibss_params;
113 u8 ibss_params_len;
114 u8 *challenge;
115 u8 challenge_len;
116 u8 *wpa;
117 u8 wpa_len;
118 u8 *rsn;
119 u8 rsn_len;
120 u8 *erp_info;
121 u8 erp_info_len;
122 u8 *ext_supp_rates;
123 u8 ext_supp_rates_len;
124 u8 *wmm_info;
125 u8 wmm_info_len;
126 u8 *wmm_param;
127 u8 wmm_param_len;
128 u8 *mdie;
129 u8 mdie_len;
130 u8 *ftie;
131 u8 ftie_len;
132 };
133
134 typedef enum { ParseOK = 0, ParseUnknown = 1, ParseFailed = -1 } ParseRes;
135
136
137 static ParseRes ieee802_11_parse_elems(u8 *start, size_t len,
138 struct ieee802_11_elems *elems)
139 {
140 size_t left = len;
141 u8 *pos = start;
142 int unknown = 0;
143
144 os_memset(elems, 0, sizeof(*elems));
145
146 while (left >= 2) {
147 u8 id, elen;
148
149 id = *pos++;
150 elen = *pos++;
151 left -= 2;
152
153 if (elen > left) {
154 #if 0
155 wpa_printf(MSG_MSGDUMP, "MLME: IEEE 802.11 element "
156 "parse failed (id=%d elen=%d left=%d)",
157 id, elen, left);
158 #endif
159 return ParseFailed;
160 }
161
162 switch (id) {
163 case WLAN_EID_SSID:
164 elems->ssid = pos;
165 elems->ssid_len = elen;
166 break;
167 case WLAN_EID_SUPP_RATES:
168 elems->supp_rates = pos;
169 elems->supp_rates_len = elen;
170 break;
171 case WLAN_EID_FH_PARAMS:
172 elems->fh_params = pos;
173 elems->fh_params_len = elen;
174 break;
175 case WLAN_EID_DS_PARAMS:
176 elems->ds_params = pos;
177 elems->ds_params_len = elen;
178 break;
179 case WLAN_EID_CF_PARAMS:
180 elems->cf_params = pos;
181 elems->cf_params_len = elen;
182 break;
183 case WLAN_EID_TIM:
184 elems->tim = pos;
185 elems->tim_len = elen;
186 break;
187 case WLAN_EID_IBSS_PARAMS:
188 elems->ibss_params = pos;
189 elems->ibss_params_len = elen;
190 break;
191 case WLAN_EID_CHALLENGE:
192 elems->challenge = pos;
193 elems->challenge_len = elen;
194 break;
195 case WLAN_EID_VENDOR_SPECIFIC:
196 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
197 pos[2] == 0xf2) {
198 /* Microsoft OUI (00:50:F2) */
199 if (pos[3] == 1) {
200 /* OUI Type 1 - WPA IE */
201 elems->wpa = pos;
202 elems->wpa_len = elen;
203 } else if (elen >= 5 && pos[3] == 2) {
204 if (pos[4] == 0) {
205 elems->wmm_info = pos;
206 elems->wmm_info_len = elen;
207 } else if (pos[4] == 1) {
208 elems->wmm_param = pos;
209 elems->wmm_param_len = elen;
210 }
211 }
212 }
213 break;
214 case WLAN_EID_RSN:
215 elems->rsn = pos;
216 elems->rsn_len = elen;
217 break;
218 case WLAN_EID_ERP_INFO:
219 elems->erp_info = pos;
220 elems->erp_info_len = elen;
221 break;
222 case WLAN_EID_EXT_SUPP_RATES:
223 elems->ext_supp_rates = pos;
224 elems->ext_supp_rates_len = elen;
225 break;
226 case WLAN_EID_MOBILITY_DOMAIN:
227 elems->mdie = pos;
228 elems->mdie_len = elen;
229 break;
230 case WLAN_EID_FAST_BSS_TRANSITION:
231 elems->ftie = pos;
232 elems->ftie_len = elen;
233 break;
234 default:
235 #if 0
236 wpa_printf(MSG_MSGDUMP "MLME: IEEE 802.11 element "
237 "parse ignored unknown element (id=%d "
238 "elen=%d)", id, elen);
239 #endif
240 unknown++;
241 break;
242 }
243
244 left -= elen;
245 pos += elen;
246 }
247
248 if (left)
249 return ParseFailed;
250
251 return unknown ? ParseUnknown : ParseOK;
252 }
253
254
255 static int ieee80211_sta_set_channel(struct wpa_supplicant *wpa_s,
256 wpa_hw_mode phymode, int chan,
257 int freq)
258 {
259 size_t i;
260 struct wpa_hw_modes *mode;
261
262 for (i = 0; i < wpa_s->mlme.num_modes; i++) {
263 mode = &wpa_s->mlme.modes[i];
264 if (mode->mode == phymode) {
265 wpa_s->mlme.curr_rates = mode->rates;
266 wpa_s->mlme.num_curr_rates = mode->num_rates;
267 break;
268 }
269 }
270
271 return wpa_drv_set_channel(wpa_s, phymode, chan, freq);
272 }
273
274
275
276 #if 0 /* FIX */
277 static int ecw2cw(int ecw)
278 {
279 int cw = 1;
280 while (ecw > 0) {
281 cw <<= 1;
282 ecw--;
283 }
284 return cw - 1;
285 }
286 #endif
287
288
289 static void ieee80211_sta_wmm_params(struct wpa_supplicant *wpa_s,
290 u8 *wmm_param, size_t wmm_param_len)
291 {
292 size_t left;
293 int count;
294 u8 *pos;
295
296 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
297 return;
298 count = wmm_param[6] & 0x0f;
299 if (count == wpa_s->mlme.wmm_last_param_set)
300 return;
301 wpa_s->mlme.wmm_last_param_set = count;
302
303 pos = wmm_param + 8;
304 left = wmm_param_len - 8;
305
306 #if 0 /* FIX */
307 wmm_acm = 0;
308 for (; left >= 4; left -= 4, pos += 4) {
309 int aci = (pos[0] >> 5) & 0x03;
310 int acm = (pos[0] >> 4) & 0x01;
311 int queue;
312
313 switch (aci) {
314 case 1:
315 queue = IEEE80211_TX_QUEUE_DATA3;
316 if (acm)
317 wmm_acm |= BIT(1) | BIT(2);
318 break;
319 case 2:
320 queue = IEEE80211_TX_QUEUE_DATA1;
321 if (acm)
322 wmm_acm |= BIT(4) | BIT(5);
323 break;
324 case 3:
325 queue = IEEE80211_TX_QUEUE_DATA0;
326 if (acm)
327 wmm_acm |= BIT(6) | BIT(7);
328 break;
329 case 0:
330 default:
331 queue = IEEE80211_TX_QUEUE_DATA2;
332 if (acm)
333 wpa_s->mlme.wmm_acm |= BIT(0) | BIT(3);
334 break;
335 }
336
337 params.aifs = pos[0] & 0x0f;
338 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
339 params.cw_min = ecw2cw(pos[1] & 0x0f);
340 /* TXOP is in units of 32 usec; burst_time in 0.1 ms */
341 params.burst_time = (pos[2] | (pos[3] << 8)) * 32 / 100;
342 wpa_printf(MSG_DEBUG, "MLME: WMM queue=%d aci=%d acm=%d "
343 "aifs=%d cWmin=%d cWmax=%d burst=%d",
344 queue, aci, acm, params.aifs, params.cw_min,
345 params.cw_max, params.burst_time);
346 /* TODO: handle ACM (block TX, fallback to next lowest allowed
347 * AC for now) */
348 if (local->hw->conf_tx(local->mdev, queue, &params)) {
349 wpa_printf(MSG_DEBUG, "MLME: failed to set TX queue "
350 "parameters for queue %d", queue);
351 }
352 }
353 #endif
354 }
355
356
357 static void ieee80211_set_associated(struct wpa_supplicant *wpa_s, int assoc)
358 {
359 if (wpa_s->mlme.associated == assoc && !assoc)
360 return;
361
362 wpa_s->mlme.associated = assoc;
363
364 if (assoc) {
365 union wpa_event_data data;
366 os_memset(&data, 0, sizeof(data));
367 wpa_s->mlme.prev_bssid_set = 1;
368 os_memcpy(wpa_s->mlme.prev_bssid, wpa_s->bssid, ETH_ALEN);
369 data.assoc_info.req_ies = wpa_s->mlme.assocreq_ies;
370 data.assoc_info.req_ies_len = wpa_s->mlme.assocreq_ies_len;
371 data.assoc_info.resp_ies = wpa_s->mlme.assocresp_ies;
372 data.assoc_info.resp_ies_len = wpa_s->mlme.assocresp_ies_len;
373 wpa_supplicant_event(wpa_s, EVENT_ASSOC, &data);
374 } else {
375 wpa_supplicant_event(wpa_s, EVENT_DISASSOC, NULL);
376 }
377 os_get_time(&wpa_s->mlme.last_probe);
378 }
379
380
381 static int ieee80211_sta_tx(struct wpa_supplicant *wpa_s, const u8 *buf,
382 size_t len)
383 {
384 return wpa_drv_send_mlme(wpa_s, buf, len);
385 }
386
387
388 static void ieee80211_send_auth(struct wpa_supplicant *wpa_s,
389 int transaction, u8 *extra, size_t extra_len,
390 int encrypt)
391 {
392 u8 *buf;
393 size_t len;
394 struct ieee80211_mgmt *mgmt;
395
396 buf = os_malloc(sizeof(*mgmt) + 6 + extra_len);
397 if (buf == NULL) {
398 wpa_printf(MSG_DEBUG, "MLME: failed to allocate buffer for "
399 "auth frame");
400 return;
401 }
402
403 mgmt = (struct ieee80211_mgmt *) buf;
404 len = 24 + 6;
405 os_memset(mgmt, 0, 24 + 6);
406 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
407 WLAN_FC_STYPE_AUTH);
408 if (encrypt)
409 mgmt->frame_control |= host_to_le16(WLAN_FC_ISWEP);
410 os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
411 os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
412 os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
413 mgmt->u.auth.auth_alg = host_to_le16(wpa_s->mlme.auth_alg);
414 mgmt->u.auth.auth_transaction = host_to_le16(transaction);
415 wpa_s->mlme.auth_transaction = transaction + 1;
416 mgmt->u.auth.status_code = host_to_le16(0);
417 if (extra) {
418 os_memcpy(buf + len, extra, extra_len);
419 len += extra_len;
420 }
421
422 ieee80211_sta_tx(wpa_s, buf, len);
423 os_free(buf);
424 }
425
426
427 static void ieee80211_reschedule_timer(struct wpa_supplicant *wpa_s, int ms)
428 {
429 eloop_cancel_timeout(ieee80211_sta_timer, wpa_s, NULL);
430 eloop_register_timeout(ms / 1000, 1000 * (ms % 1000),
431 ieee80211_sta_timer, wpa_s, NULL);
432 }
433
434
435 static void ieee80211_authenticate(struct wpa_supplicant *wpa_s)
436 {
437 u8 *extra;
438 size_t extra_len;
439
440 wpa_s->mlme.auth_tries++;
441 if (wpa_s->mlme.auth_tries > IEEE80211_AUTH_MAX_TRIES) {
442 wpa_printf(MSG_DEBUG, "MLME: authentication with AP " MACSTR
443 " timed out", MAC2STR(wpa_s->bssid));
444 return;
445 }
446
447 wpa_s->mlme.state = IEEE80211_AUTHENTICATE;
448 wpa_printf(MSG_DEBUG, "MLME: authenticate with AP " MACSTR,
449 MAC2STR(wpa_s->bssid));
450
451 extra = NULL;
452 extra_len = 0;
453
454 #ifdef CONFIG_IEEE80211R
455 if ((wpa_s->mlme.key_mgmt == KEY_MGMT_FT_802_1X ||
456 wpa_s->mlme.key_mgmt == KEY_MGMT_FT_PSK) &&
457 wpa_s->mlme.ft_ies) {
458 struct ieee80211_sta_bss *bss;
459 struct rsn_mdie *mdie = NULL;
460 bss = ieee80211_bss_get(wpa_s, wpa_s->bssid);
461 if (bss && bss->mdie_len >= 2 + sizeof(*mdie))
462 mdie = (struct rsn_mdie *) (bss->mdie + 2);
463 if (mdie &&
464 os_memcmp(mdie->mobility_domain, wpa_s->mlme.current_md,
465 MOBILITY_DOMAIN_ID_LEN) == 0) {
466 wpa_printf(MSG_DEBUG, "MLME: Trying to use FT "
467 "over-the-air");
468 wpa_s->mlme.auth_alg = WLAN_AUTH_FT;
469 extra = wpa_s->mlme.ft_ies;
470 extra_len = wpa_s->mlme.ft_ies_len;
471 }
472 }
473 #endif /* CONFIG_IEEE80211R */
474
475 ieee80211_send_auth(wpa_s, 1, extra, extra_len, 0);
476
477 ieee80211_reschedule_timer(wpa_s, IEEE80211_AUTH_TIMEOUT);
478 }
479
480
481 static void ieee80211_send_assoc(struct wpa_supplicant *wpa_s)
482 {
483 struct ieee80211_mgmt *mgmt;
484 u8 *pos, *ies, *buf;
485 int i, len;
486 u16 capab;
487 struct ieee80211_sta_bss *bss;
488 int wmm = 0;
489 size_t blen, buflen;
490
491 if (wpa_s->mlme.curr_rates == NULL) {
492 wpa_printf(MSG_DEBUG, "MLME: curr_rates not set for assoc");
493 return;
494 }
495
496 buflen = sizeof(*mgmt) + 200 + wpa_s->mlme.extra_ie_len +
497 wpa_s->mlme.ssid_len;
498 #ifdef CONFIG_IEEE80211R
499 if (wpa_s->mlme.ft_ies)
500 buflen += wpa_s->mlme.ft_ies_len;
501 #endif /* CONFIG_IEEE80211R */
502 buf = os_malloc(buflen);
503 if (buf == NULL) {
504 wpa_printf(MSG_DEBUG, "MLME: failed to allocate buffer for "
505 "assoc frame");
506 return;
507 }
508 blen = 0;
509
510 capab = wpa_s->mlme.capab;
511 if (wpa_s->mlme.phymode == WPA_MODE_IEEE80211G) {
512 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME |
513 WLAN_CAPABILITY_SHORT_PREAMBLE;
514 }
515 bss = ieee80211_bss_get(wpa_s, wpa_s->bssid);
516 if (bss) {
517 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
518 capab |= WLAN_CAPABILITY_PRIVACY;
519 if (bss->wmm_ie) {
520 wmm = 1;
521 }
522 }
523
524 mgmt = (struct ieee80211_mgmt *) buf;
525 blen += 24;
526 os_memset(mgmt, 0, 24);
527 os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
528 os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
529 os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
530
531 if (wpa_s->mlme.prev_bssid_set) {
532 blen += 10;
533 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
534 WLAN_FC_STYPE_REASSOC_REQ);
535 mgmt->u.reassoc_req.capab_info = host_to_le16(capab);
536 mgmt->u.reassoc_req.listen_interval = host_to_le16(1);
537 os_memcpy(mgmt->u.reassoc_req.current_ap,
538 wpa_s->mlme.prev_bssid,
539 ETH_ALEN);
540 } else {
541 blen += 4;
542 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
543 WLAN_FC_STYPE_ASSOC_REQ);
544 mgmt->u.assoc_req.capab_info = host_to_le16(capab);
545 mgmt->u.assoc_req.listen_interval = host_to_le16(1);
546 }
547
548 /* SSID */
549 ies = pos = buf + blen;
550 blen += 2 + wpa_s->mlme.ssid_len;
551 *pos++ = WLAN_EID_SSID;
552 *pos++ = wpa_s->mlme.ssid_len;
553 os_memcpy(pos, wpa_s->mlme.ssid, wpa_s->mlme.ssid_len);
554
555 len = wpa_s->mlme.num_curr_rates;
556 if (len > 8)
557 len = 8;
558 pos = buf + blen;
559 blen += len + 2;
560 *pos++ = WLAN_EID_SUPP_RATES;
561 *pos++ = len;
562 for (i = 0; i < len; i++) {
563 int rate = wpa_s->mlme.curr_rates[i].rate;
564 *pos++ = (u8) (rate / 5);
565 }
566
567 if (wpa_s->mlme.num_curr_rates > len) {
568 pos = buf + blen;
569 blen += wpa_s->mlme.num_curr_rates - len + 2;
570 *pos++ = WLAN_EID_EXT_SUPP_RATES;
571 *pos++ = wpa_s->mlme.num_curr_rates - len;
572 for (i = len; i < wpa_s->mlme.num_curr_rates; i++) {
573 int rate = wpa_s->mlme.curr_rates[i].rate;
574 *pos++ = (u8) (rate / 5);
575 }
576 }
577
578 if (wpa_s->mlme.extra_ie && wpa_s->mlme.auth_alg != WLAN_AUTH_FT) {
579 pos = buf + blen;
580 blen += wpa_s->mlme.extra_ie_len;
581 os_memcpy(pos, wpa_s->mlme.extra_ie, wpa_s->mlme.extra_ie_len);
582 }
583
584 #ifdef CONFIG_IEEE80211R
585 if ((wpa_s->mlme.key_mgmt == KEY_MGMT_FT_802_1X ||
586 wpa_s->mlme.key_mgmt == KEY_MGMT_FT_PSK) &&
587 wpa_s->mlme.auth_alg != WLAN_AUTH_FT &&
588 bss && bss->mdie &&
589 bss->mdie_len >= 2 + sizeof(struct rsn_mdie) &&
590 bss->mdie[1] >= sizeof(struct rsn_mdie)) {
591 pos = buf + blen;
592 blen += 2 + sizeof(struct rsn_mdie);
593 *pos++ = WLAN_EID_MOBILITY_DOMAIN;
594 *pos++ = sizeof(struct rsn_mdie);
595 os_memcpy(pos, bss->mdie + 2, MOBILITY_DOMAIN_ID_LEN);
596 pos += MOBILITY_DOMAIN_ID_LEN;
597 *pos++ = 0; /* FIX: copy from the target AP's MDIE */
598 }
599
600 if ((wpa_s->mlme.key_mgmt == KEY_MGMT_FT_802_1X ||
601 wpa_s->mlme.key_mgmt == KEY_MGMT_FT_PSK) &&
602 wpa_s->mlme.auth_alg == WLAN_AUTH_FT && wpa_s->mlme.ft_ies) {
603 pos = buf + blen;
604 os_memcpy(pos, wpa_s->mlme.ft_ies, wpa_s->mlme.ft_ies_len);
605 pos += wpa_s->mlme.ft_ies_len;
606 blen += wpa_s->mlme.ft_ies_len;
607 }
608 #endif /* CONFIG_IEEE80211R */
609
610 if (wmm && wpa_s->mlme.wmm_enabled) {
611 pos = buf + blen;
612 blen += 9;
613 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
614 *pos++ = 7; /* len */
615 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
616 *pos++ = 0x50;
617 *pos++ = 0xf2;
618 *pos++ = 2; /* WME */
619 *pos++ = 0; /* WME info */
620 *pos++ = 1; /* WME ver */
621 *pos++ = 0;
622 }
623
624 os_free(wpa_s->mlme.assocreq_ies);
625 wpa_s->mlme.assocreq_ies_len = (buf + blen) - ies;
626 wpa_s->mlme.assocreq_ies = os_malloc(wpa_s->mlme.assocreq_ies_len);
627 if (wpa_s->mlme.assocreq_ies) {
628 os_memcpy(wpa_s->mlme.assocreq_ies, ies,
629 wpa_s->mlme.assocreq_ies_len);
630 }
631
632 ieee80211_sta_tx(wpa_s, buf, blen);
633 os_free(buf);
634 }
635
636
637 static void ieee80211_send_deauth(struct wpa_supplicant *wpa_s, u16 reason)
638 {
639 u8 *buf;
640 size_t len;
641 struct ieee80211_mgmt *mgmt;
642
643 buf = os_zalloc(sizeof(*mgmt));
644 if (buf == NULL) {
645 wpa_printf(MSG_DEBUG, "MLME: failed to allocate buffer for "
646 "deauth frame");
647 return;
648 }
649
650 mgmt = (struct ieee80211_mgmt *) buf;
651 len = 24;
652 os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
653 os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
654 os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
655 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
656 WLAN_FC_STYPE_DEAUTH);
657 len += 2;
658 mgmt->u.deauth.reason_code = host_to_le16(reason);
659
660 ieee80211_sta_tx(wpa_s, buf, len);
661 os_free(buf);
662 }
663
664
665 static void ieee80211_send_disassoc(struct wpa_supplicant *wpa_s, u16 reason)
666 {
667 u8 *buf;
668 size_t len;
669 struct ieee80211_mgmt *mgmt;
670
671 buf = os_zalloc(sizeof(*mgmt));
672 if (buf == NULL) {
673 wpa_printf(MSG_DEBUG, "MLME: failed to allocate buffer for "
674 "disassoc frame");
675 return;
676 }
677
678 mgmt = (struct ieee80211_mgmt *) buf;
679 len = 24;
680 os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
681 os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
682 os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
683 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
684 WLAN_FC_STYPE_DISASSOC);
685 len += 2;
686 mgmt->u.disassoc.reason_code = host_to_le16(reason);
687
688 ieee80211_sta_tx(wpa_s, buf, len);
689 os_free(buf);
690 }
691
692
693 static int ieee80211_privacy_mismatch(struct wpa_supplicant *wpa_s)
694 {
695 struct ieee80211_sta_bss *bss;
696 int res = 0;
697
698 if (wpa_s->mlme.mixed_cell ||
699 wpa_s->mlme.key_mgmt != KEY_MGMT_NONE)
700 return 0;
701
702 bss = ieee80211_bss_get(wpa_s, wpa_s->bssid);
703 if (bss == NULL)
704 return 0;
705
706 if (ieee80211_sta_wep_configured(wpa_s) !=
707 !!(bss->capability & WLAN_CAPABILITY_PRIVACY))
708 res = 1;
709
710 return res;
711 }
712
713
714 static void ieee80211_associate(struct wpa_supplicant *wpa_s)
715 {
716 wpa_s->mlme.assoc_tries++;
717 if (wpa_s->mlme.assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
718 wpa_printf(MSG_DEBUG, "MLME: association with AP " MACSTR
719 " timed out", MAC2STR(wpa_s->bssid));
720 return;
721 }
722
723 wpa_s->mlme.state = IEEE80211_ASSOCIATE;
724 wpa_printf(MSG_DEBUG, "MLME: associate with AP " MACSTR,
725 MAC2STR(wpa_s->bssid));
726 if (ieee80211_privacy_mismatch(wpa_s)) {
727 wpa_printf(MSG_DEBUG, "MLME: mismatch in privacy "
728 "configuration and mixed-cell disabled - abort "
729 "association");
730 return;
731 }
732
733 ieee80211_send_assoc(wpa_s);
734
735 ieee80211_reschedule_timer(wpa_s, IEEE80211_ASSOC_TIMEOUT);
736 }
737
738
739 static void ieee80211_associated(struct wpa_supplicant *wpa_s)
740 {
741 int disassoc;
742
743 /* TODO: start monitoring current AP signal quality and number of
744 * missed beacons. Scan other channels every now and then and search
745 * for better APs. */
746 /* TODO: remove expired BSSes */
747
748 wpa_s->mlme.state = IEEE80211_ASSOCIATED;
749
750 #if 0 /* FIX */
751 sta = sta_info_get(local, wpa_s->bssid);
752 if (sta == NULL) {
753 wpa_printf(MSG_DEBUG "MLME: No STA entry for own AP " MACSTR,
754 MAC2STR(wpa_s->bssid));
755 disassoc = 1;
756 } else {
757 disassoc = 0;
758 if (time_after(jiffies,
759 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
760 if (wpa_s->mlme.probereq_poll) {
761 wpa_printf(MSG_DEBUG "MLME: No ProbeResp from "
762 "current AP " MACSTR " - assume "
763 "out of range",
764 MAC2STR(wpa_s->bssid));
765 disassoc = 1;
766 } else {
767 ieee80211_send_probe_req(
768 wpa_s->bssid,
769 wpa_s->mlme.scan_ssid,
770 wpa_s->mlme.scan_ssid_len);
771 wpa_s->mlme.probereq_poll = 1;
772 }
773 } else {
774 wpa_s->mlme.probereq_poll = 0;
775 if (time_after(jiffies, wpa_s->mlme.last_probe +
776 IEEE80211_PROBE_INTERVAL)) {
777 wpa_s->mlme.last_probe = jiffies;
778 ieee80211_send_probe_req(wpa_s->bssid,
779 wpa_s->mlme.ssid,
780 wpa_s->mlme.ssid_len);
781 }
782 }
783 sta_info_release(local, sta);
784 }
785 #else
786 disassoc = 0;
787 #endif
788 if (disassoc) {
789 wpa_supplicant_event(wpa_s, EVENT_DISASSOC, NULL);
790 ieee80211_reschedule_timer(wpa_s,
791 IEEE80211_MONITORING_INTERVAL +
792 30000);
793 } else {
794 ieee80211_reschedule_timer(wpa_s,
795 IEEE80211_MONITORING_INTERVAL);
796 }
797 }
798
799
800 static void ieee80211_send_probe_req(struct wpa_supplicant *wpa_s,
801 const u8 *dst,
802 const u8 *ssid, size_t ssid_len)
803 {
804 u8 *buf;
805 size_t len;
806 struct ieee80211_mgmt *mgmt;
807 u8 *pos, *supp_rates;
808 u8 *esupp_rates = NULL;
809 int i;
810
811 buf = os_malloc(sizeof(*mgmt) + 200 + wpa_s->mlme.extra_probe_ie_len);
812 if (buf == NULL) {
813 wpa_printf(MSG_DEBUG, "MLME: failed to allocate buffer for "
814 "probe request");
815 return;
816 }
817
818 mgmt = (struct ieee80211_mgmt *) buf;
819 len = 24;
820 os_memset(mgmt, 0, 24);
821 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
822 WLAN_FC_STYPE_PROBE_REQ);
823 os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
824 if (dst) {
825 os_memcpy(mgmt->da, dst, ETH_ALEN);
826 os_memcpy(mgmt->bssid, dst, ETH_ALEN);
827 } else {
828 os_memset(mgmt->da, 0xff, ETH_ALEN);
829 os_memset(mgmt->bssid, 0xff, ETH_ALEN);
830 }
831 pos = buf + len;
832 len += 2 + ssid_len;
833 *pos++ = WLAN_EID_SSID;
834 *pos++ = ssid_len;
835 os_memcpy(pos, ssid, ssid_len);
836
837 supp_rates = buf + len;
838 len += 2;
839 supp_rates[0] = WLAN_EID_SUPP_RATES;
840 supp_rates[1] = 0;
841 for (i = 0; i < wpa_s->mlme.num_curr_rates; i++) {
842 struct wpa_rate_data *rate = &wpa_s->mlme.curr_rates[i];
843 if (esupp_rates) {
844 pos = buf + len;
845 len++;
846 esupp_rates[1]++;
847 } else if (supp_rates[1] == 8) {
848 esupp_rates = pos;
849 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
850 esupp_rates[1] = 1;
851 pos = &esupp_rates[2];
852 len += 3;
853 } else {
854 pos = buf + len;
855 len++;
856 supp_rates[1]++;
857 }
858 *pos++ = rate->rate / 5;
859 }
860
861 if (wpa_s->mlme.extra_probe_ie) {
862 os_memcpy(pos, wpa_s->mlme.extra_probe_ie,
863 wpa_s->mlme.extra_probe_ie_len);
864 len += wpa_s->mlme.extra_probe_ie_len;
865 }
866
867 ieee80211_sta_tx(wpa_s, buf, len);
868 os_free(buf);
869 }
870
871
872 static int ieee80211_sta_wep_configured(struct wpa_supplicant *wpa_s)
873 {
874 #if 0 /* FIX */
875 if (sdata == NULL || sdata->default_key == NULL ||
876 sdata->default_key->alg != ALG_WEP)
877 return 0;
878 return 1;
879 #else
880 return 0;
881 #endif
882 }
883
884
885 static void ieee80211_auth_completed(struct wpa_supplicant *wpa_s)
886 {
887 wpa_printf(MSG_DEBUG, "MLME: authenticated");
888 wpa_s->mlme.authenticated = 1;
889 ieee80211_associate(wpa_s);
890 }
891
892
893 static void ieee80211_auth_challenge(struct wpa_supplicant *wpa_s,
894 struct ieee80211_mgmt *mgmt,
895 size_t len,
896 struct ieee80211_rx_status *rx_status)
897 {
898 u8 *pos;
899 struct ieee802_11_elems elems;
900
901 wpa_printf(MSG_DEBUG, "MLME: replying to auth challenge");
902 pos = mgmt->u.auth.variable;
903 if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems)
904 == ParseFailed) {
905 wpa_printf(MSG_DEBUG, "MLME: failed to parse Auth(challenge)");
906 return;
907 }
908 if (elems.challenge == NULL) {
909 wpa_printf(MSG_DEBUG, "MLME: no challenge IE in shared key "
910 "auth frame");
911 return;
912 }
913 ieee80211_send_auth(wpa_s, 3, elems.challenge - 2,
914 elems.challenge_len + 2, 1);
915 }
916
917
918 static void ieee80211_rx_mgmt_auth(struct wpa_supplicant *wpa_s,
919 struct ieee80211_mgmt *mgmt,
920 size_t len,
921 struct ieee80211_rx_status *rx_status)
922 {
923 struct wpa_ssid *ssid = wpa_s->current_ssid;
924 u16 auth_alg, auth_transaction, status_code;
925 int adhoc;
926
927 adhoc = ssid && ssid->mode == 1;
928
929 if (wpa_s->mlme.state != IEEE80211_AUTHENTICATE && !adhoc) {
930 wpa_printf(MSG_DEBUG, "MLME: authentication frame received "
931 "from " MACSTR ", but not in authenticate state - "
932 "ignored", MAC2STR(mgmt->sa));
933 return;
934 }
935
936 if (len < 24 + 6) {
937 wpa_printf(MSG_DEBUG, "MLME: too short (%lu) authentication "
938 "frame received from " MACSTR " - ignored",
939 (unsigned long) len, MAC2STR(mgmt->sa));
940 return;
941 }
942
943 if (!adhoc && os_memcmp(wpa_s->bssid, mgmt->sa, ETH_ALEN) != 0) {
944 wpa_printf(MSG_DEBUG, "MLME: authentication frame received "
945 "from unknown AP (SA=" MACSTR " BSSID=" MACSTR
946 ") - ignored",
947 MAC2STR(mgmt->sa), MAC2STR(mgmt->bssid));
948 return;
949 }
950
951 if (adhoc && os_memcmp(wpa_s->bssid, mgmt->bssid, ETH_ALEN) != 0) {
952 wpa_printf(MSG_DEBUG, "MLME: authentication frame received "
953 "from unknown BSSID (SA=" MACSTR " BSSID=" MACSTR
954 ") - ignored",
955 MAC2STR(mgmt->sa), MAC2STR(mgmt->bssid));
956 return;
957 }
958
959 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
960 auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction);
961 status_code = le_to_host16(mgmt->u.auth.status_code);
962
963 wpa_printf(MSG_DEBUG, "MLME: RX authentication from " MACSTR
964 " (alg=%d transaction=%d status=%d)",
965 MAC2STR(mgmt->sa), auth_alg, auth_transaction, status_code);
966
967 if (adhoc) {
968 /* IEEE 802.11 standard does not require authentication in IBSS
969 * networks and most implementations do not seem to use it.
970 * However, try to reply to authentication attempts if someone
971 * has actually implemented this.
972 * TODO: Could implement shared key authentication. */
973 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
974 wpa_printf(MSG_DEBUG, "MLME: unexpected IBSS "
975 "authentication frame (alg=%d "
976 "transaction=%d)",
977 auth_alg, auth_transaction);
978 return;
979 }
980 ieee80211_send_auth(wpa_s, 2, NULL, 0, 0);
981 }
982
983 if (auth_alg != wpa_s->mlme.auth_alg ||
984 auth_transaction != wpa_s->mlme.auth_transaction) {
985 wpa_printf(MSG_DEBUG, "MLME: unexpected authentication frame "
986 "(alg=%d transaction=%d)",
987 auth_alg, auth_transaction);
988 return;
989 }
990
991 if (status_code != WLAN_STATUS_SUCCESS) {
992 wpa_printf(MSG_DEBUG, "MLME: AP denied authentication "
993 "(auth_alg=%d code=%d)", wpa_s->mlme.auth_alg,
994 status_code);
995 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
996 const int num_algs = 3;
997 u8 algs[num_algs];
998 int i, pos;
999 algs[0] = algs[1] = algs[2] = 0xff;
1000 if (wpa_s->mlme.auth_algs & IEEE80211_AUTH_ALG_OPEN)
1001 algs[0] = WLAN_AUTH_OPEN;
1002 if (wpa_s->mlme.auth_algs &
1003 IEEE80211_AUTH_ALG_SHARED_KEY)
1004 algs[1] = WLAN_AUTH_SHARED_KEY;
1005 if (wpa_s->mlme.auth_algs & IEEE80211_AUTH_ALG_LEAP)
1006 algs[2] = WLAN_AUTH_LEAP;
1007 if (wpa_s->mlme.auth_alg == WLAN_AUTH_OPEN)
1008 pos = 0;
1009 else if (wpa_s->mlme.auth_alg == WLAN_AUTH_SHARED_KEY)
1010 pos = 1;
1011 else
1012 pos = 2;
1013 for (i = 0; i < num_algs; i++) {
1014 pos++;
1015 if (pos >= num_algs)
1016 pos = 0;
1017 if (algs[pos] == wpa_s->mlme.auth_alg ||
1018 algs[pos] == 0xff)
1019 continue;
1020 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1021 !ieee80211_sta_wep_configured(wpa_s))
1022 continue;
1023 wpa_s->mlme.auth_alg = algs[pos];
1024 wpa_printf(MSG_DEBUG, "MLME: set auth_alg=%d "
1025 "for next try",
1026 wpa_s->mlme.auth_alg);
1027 break;
1028 }
1029 }
1030 return;
1031 }
1032
1033 switch (wpa_s->mlme.auth_alg) {
1034 case WLAN_AUTH_OPEN:
1035 case WLAN_AUTH_LEAP:
1036 ieee80211_auth_completed(wpa_s);
1037 break;
1038 case WLAN_AUTH_SHARED_KEY:
1039 if (wpa_s->mlme.auth_transaction == 4)
1040 ieee80211_auth_completed(wpa_s);
1041 else
1042 ieee80211_auth_challenge(wpa_s, mgmt, len,
1043 rx_status);
1044 break;
1045 #ifdef CONFIG_IEEE80211R
1046 case WLAN_AUTH_FT:
1047 {
1048 union wpa_event_data data;
1049 os_memset(&data, 0, sizeof(data));
1050 data.ft_ies.ies = mgmt->u.auth.variable;
1051 data.ft_ies.ies_len = len -
1052 (mgmt->u.auth.variable - (u8 *) mgmt);
1053 os_memcpy(data.ft_ies.target_ap, wpa_s->bssid, ETH_ALEN);
1054 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &data);
1055 ieee80211_auth_completed(wpa_s);
1056 break;
1057 }
1058 #endif /* CONFIG_IEEE80211R */
1059 }
1060 }
1061
1062
1063 static void ieee80211_rx_mgmt_deauth(struct wpa_supplicant *wpa_s,
1064 struct ieee80211_mgmt *mgmt,
1065 size_t len,
1066 struct ieee80211_rx_status *rx_status)
1067 {
1068 u16 reason_code;
1069
1070 if (len < 24 + 2) {
1071 wpa_printf(MSG_DEBUG, "MLME: too short (%lu) deauthentication "
1072 "frame received from " MACSTR " - ignored",
1073 (unsigned long) len, MAC2STR(mgmt->sa));
1074 return;
1075 }
1076
1077 if (os_memcmp(wpa_s->bssid, mgmt->sa, ETH_ALEN) != 0) {
1078 wpa_printf(MSG_DEBUG, "MLME: deauthentication frame received "
1079 "from unknown AP (SA=" MACSTR " BSSID=" MACSTR
1080 ") - ignored",
1081 MAC2STR(mgmt->sa), MAC2STR(mgmt->bssid));
1082 return;
1083 }
1084
1085 reason_code = le_to_host16(mgmt->u.deauth.reason_code);
1086
1087 wpa_printf(MSG_DEBUG, "MLME: RX deauthentication from " MACSTR
1088 " (reason=%d)", MAC2STR(mgmt->sa), reason_code);
1089
1090 if (wpa_s->mlme.authenticated)
1091 wpa_printf(MSG_DEBUG, "MLME: deauthenticated");
1092
1093 if (wpa_s->mlme.state == IEEE80211_AUTHENTICATE ||
1094 wpa_s->mlme.state == IEEE80211_ASSOCIATE ||
1095 wpa_s->mlme.state == IEEE80211_ASSOCIATED) {
1096 wpa_s->mlme.state = IEEE80211_AUTHENTICATE;
1097 ieee80211_reschedule_timer(wpa_s,
1098 IEEE80211_RETRY_AUTH_INTERVAL);
1099 }
1100
1101 ieee80211_set_associated(wpa_s, 0);
1102 wpa_s->mlme.authenticated = 0;
1103 }
1104
1105
1106 static void ieee80211_rx_mgmt_disassoc(struct wpa_supplicant *wpa_s,
1107 struct ieee80211_mgmt *mgmt,
1108 size_t len,
1109 struct ieee80211_rx_status *rx_status)
1110 {
1111 u16 reason_code;
1112
1113 if (len < 24 + 2) {
1114 wpa_printf(MSG_DEBUG, "MLME: too short (%lu) disassociation "
1115 "frame received from " MACSTR " - ignored",
1116 (unsigned long) len, MAC2STR(mgmt->sa));
1117 return;
1118 }
1119
1120 if (os_memcmp(wpa_s->bssid, mgmt->sa, ETH_ALEN) != 0) {
1121 wpa_printf(MSG_DEBUG, "MLME: disassociation frame received "
1122 "from unknown AP (SA=" MACSTR " BSSID=" MACSTR
1123 ") - ignored",
1124 MAC2STR(mgmt->sa), MAC2STR(mgmt->bssid));
1125 return;
1126 }
1127
1128 reason_code = le_to_host16(mgmt->u.disassoc.reason_code);
1129
1130 wpa_printf(MSG_DEBUG, "MLME: RX disassociation from " MACSTR
1131 " (reason=%d)", MAC2STR(mgmt->sa), reason_code);
1132
1133 if (wpa_s->mlme.associated)
1134 wpa_printf(MSG_DEBUG, "MLME: disassociated");
1135
1136 if (wpa_s->mlme.state == IEEE80211_ASSOCIATED) {
1137 wpa_s->mlme.state = IEEE80211_ASSOCIATE;
1138 ieee80211_reschedule_timer(wpa_s,
1139 IEEE80211_RETRY_AUTH_INTERVAL);
1140 }
1141
1142 ieee80211_set_associated(wpa_s, 0);
1143 }
1144
1145
1146 static int ieee80211_ft_assoc_resp(struct wpa_supplicant *wpa_s,
1147 struct ieee802_11_elems *elems)
1148 {
1149 #ifdef CONFIG_IEEE80211R
1150 const u8 *mobility_domain = NULL;
1151 const u8 *r0kh_id = NULL;
1152 size_t r0kh_id_len = 0;
1153 const u8 *r1kh_id = NULL;
1154 struct rsn_ftie *hdr;
1155 const u8 *pos, *end;
1156
1157 if (elems->mdie && elems->mdie_len >= MOBILITY_DOMAIN_ID_LEN)
1158 mobility_domain = elems->mdie;
1159 if (elems->ftie && elems->ftie_len >= sizeof(struct rsn_ftie)) {
1160 end = elems->ftie + elems->ftie_len;
1161 hdr = (struct rsn_ftie *) elems->ftie;
1162 pos = (const u8 *) (hdr + 1);
1163 while (pos + 1 < end) {
1164 if (pos + 2 + pos[1] > end)
1165 break;
1166 if (pos[0] == FTIE_SUBELEM_R1KH_ID &&
1167 pos[1] == FT_R1KH_ID_LEN)
1168 r1kh_id = pos + 2;
1169 else if (pos[0] == FTIE_SUBELEM_R0KH_ID &&
1170 pos[1] >= 1 && pos[1] <= FT_R0KH_ID_MAX_LEN) {
1171 r0kh_id = pos + 2;
1172 r0kh_id_len = pos[1];
1173 }
1174 pos += 2 + pos[1];
1175 }
1176 }
1177 return wpa_sm_set_ft_params(wpa_s->wpa, mobility_domain, r0kh_id,
1178 r0kh_id_len, r1kh_id);
1179 #else /* CONFIG_IEEE80211R */
1180 return 0;
1181 #endif /* CONFIG_IEEE80211R */
1182 }
1183
1184
1185 static void ieee80211_rx_mgmt_assoc_resp(struct wpa_supplicant *wpa_s,
1186 struct ieee80211_mgmt *mgmt,
1187 size_t len,
1188 struct ieee80211_rx_status *rx_status,
1189 int reassoc)
1190 {
1191 u8 rates[32];
1192 size_t rates_len;
1193 u16 capab_info, status_code, aid;
1194 struct ieee802_11_elems elems;
1195 u8 *pos;
1196
1197 /* AssocResp and ReassocResp have identical structure, so process both
1198 * of them in this function. */
1199
1200 if (wpa_s->mlme.state != IEEE80211_ASSOCIATE) {
1201 wpa_printf(MSG_DEBUG, "MLME: association frame received from "
1202 MACSTR ", but not in associate state - ignored",
1203 MAC2STR(mgmt->sa));
1204 return;
1205 }
1206
1207 if (len < 24 + 6) {
1208 wpa_printf(MSG_DEBUG, "MLME: too short (%lu) association "
1209 "frame received from " MACSTR " - ignored",
1210 (unsigned long) len, MAC2STR(mgmt->sa));
1211 return;
1212 }
1213
1214 if (os_memcmp(wpa_s->bssid, mgmt->sa, ETH_ALEN) != 0) {
1215 wpa_printf(MSG_DEBUG, "MLME: association frame received from "
1216 "unknown AP (SA=" MACSTR " BSSID=" MACSTR ") - "
1217 "ignored", MAC2STR(mgmt->sa), MAC2STR(mgmt->bssid));
1218 return;
1219 }
1220
1221 capab_info = le_to_host16(mgmt->u.assoc_resp.capab_info);
1222 status_code = le_to_host16(mgmt->u.assoc_resp.status_code);
1223 aid = le_to_host16(mgmt->u.assoc_resp.aid);
1224 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1225 wpa_printf(MSG_DEBUG, "MLME: invalid aid value %d; bits 15:14 "
1226 "not set", aid);
1227 aid &= ~(BIT(15) | BIT(14));
1228
1229 wpa_printf(MSG_DEBUG, "MLME: RX %sssocResp from " MACSTR
1230 " (capab=0x%x status=%d aid=%d)",
1231 reassoc ? "Rea" : "A", MAC2STR(mgmt->sa),
1232 capab_info, status_code, aid);
1233
1234 if (status_code != WLAN_STATUS_SUCCESS) {
1235 wpa_printf(MSG_DEBUG, "MLME: AP denied association (code=%d)",
1236 status_code);
1237 return;
1238 }
1239
1240 pos = mgmt->u.assoc_resp.variable;
1241 if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems)
1242 == ParseFailed) {
1243 wpa_printf(MSG_DEBUG, "MLME: failed to parse AssocResp");
1244 return;
1245 }
1246
1247 if (elems.supp_rates == NULL) {
1248 wpa_printf(MSG_DEBUG, "MLME: no SuppRates element in "
1249 "AssocResp");
1250 return;
1251 }
1252
1253 if (wpa_s->mlme.auth_alg == WLAN_AUTH_FT) {
1254 if (!reassoc) {
1255 wpa_printf(MSG_DEBUG, "MLME: AP tried to use "
1256 "association, not reassociation, response "
1257 "with FT");
1258 return;
1259 }
1260 if (wpa_ft_validate_reassoc_resp(
1261 wpa_s->wpa, pos, len - (pos - (u8 *) mgmt),
1262 mgmt->sa) < 0) {
1263 wpa_printf(MSG_DEBUG, "MLME: FT validation of Reassoc"
1264 "Resp failed");
1265 return;
1266 }
1267 } else if (ieee80211_ft_assoc_resp(wpa_s, &elems) < 0)
1268 return;
1269
1270 wpa_printf(MSG_DEBUG, "MLME: associated");
1271 wpa_s->mlme.aid = aid;
1272 wpa_s->mlme.ap_capab = capab_info;
1273
1274 os_free(wpa_s->mlme.assocresp_ies);
1275 wpa_s->mlme.assocresp_ies_len = len - (pos - (u8 *) mgmt);
1276 wpa_s->mlme.assocresp_ies = os_malloc(wpa_s->mlme.assocresp_ies_len);
1277 if (wpa_s->mlme.assocresp_ies) {
1278 os_memcpy(wpa_s->mlme.assocresp_ies, pos,
1279 wpa_s->mlme.assocresp_ies_len);
1280 }
1281
1282 ieee80211_set_associated(wpa_s, 1);
1283
1284 rates_len = elems.supp_rates_len;
1285 if (rates_len > sizeof(rates))
1286 rates_len = sizeof(rates);
1287 os_memcpy(rates, elems.supp_rates, rates_len);
1288 if (elems.ext_supp_rates) {
1289 size_t _len = elems.ext_supp_rates_len;
1290 if (_len > sizeof(rates) - rates_len)
1291 _len = sizeof(rates) - rates_len;
1292 os_memcpy(rates + rates_len, elems.ext_supp_rates, _len);
1293 rates_len += _len;
1294 }
1295
1296 if (wpa_drv_set_bssid(wpa_s, wpa_s->bssid) < 0) {
1297 wpa_printf(MSG_DEBUG, "MLME: failed to set BSSID for the "
1298 "netstack");
1299 }
1300 if (wpa_drv_set_ssid(wpa_s, wpa_s->mlme.ssid, wpa_s->mlme.ssid_len) <
1301 0) {
1302 wpa_printf(MSG_DEBUG, "MLME: failed to set SSID for the "
1303 "netstack");
1304 }
1305
1306 /* Remove STA entry before adding a new one just in case to avoid
1307 * problems with existing configuration (e.g., keys). */
1308 wpa_drv_mlme_remove_sta(wpa_s, wpa_s->bssid);
1309 if (wpa_drv_mlme_add_sta(wpa_s, wpa_s->bssid, rates, rates_len) < 0) {
1310 wpa_printf(MSG_DEBUG, "MLME: failed to add STA entry to the "
1311 "netstack");
1312 }
1313
1314 #if 0 /* FIX? */
1315 sta->assoc_ap = 1;
1316
1317 if (elems.wmm_param && wpa_s->mlme.wmm_enabled) {
1318 sta->flags |= WLAN_STA_WME;
1319 ieee80211_sta_wmm_params(wpa_s, elems.wmm_param,
1320 elems.wmm_param_len);
1321 }
1322 #endif
1323
1324 ieee80211_associated(wpa_s);
1325 }
1326
1327
1328 /* Caller must hold local->sta_bss_lock */
1329 static void __ieee80211_bss_hash_add(struct wpa_supplicant *wpa_s,
1330 struct ieee80211_sta_bss *bss)
1331 {
1332 bss->hnext = wpa_s->mlme.sta_bss_hash[STA_HASH(bss->bssid)];
1333 wpa_s->mlme.sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1334 }
1335
1336
1337 /* Caller must hold local->sta_bss_lock */
1338 static void __ieee80211_bss_hash_del(struct wpa_supplicant *wpa_s,
1339 struct ieee80211_sta_bss *bss)
1340 {
1341 struct ieee80211_sta_bss *b, *prev = NULL;
1342 b = wpa_s->mlme.sta_bss_hash[STA_HASH(bss->bssid)];
1343 while (b) {
1344 if (b == bss) {
1345 if (prev == NULL) {
1346 wpa_s->mlme.sta_bss_hash[STA_HASH(bss->bssid)]
1347 = bss->hnext;
1348 } else {
1349 prev->hnext = bss->hnext;
1350 }
1351 break;
1352 }
1353 prev = b;
1354 b = b->hnext;
1355 }
1356 }
1357
1358
1359 static struct ieee80211_sta_bss *
1360 ieee80211_bss_add(struct wpa_supplicant *wpa_s, const u8 *bssid)
1361 {
1362 struct ieee80211_sta_bss *bss;
1363
1364 bss = os_zalloc(sizeof(*bss));
1365 if (bss == NULL)
1366 return NULL;
1367 os_memcpy(bss->bssid, bssid, ETH_ALEN);
1368
1369 /* TODO: order by RSSI? */
1370 bss->next = wpa_s->mlme.sta_bss_list;
1371 wpa_s->mlme.sta_bss_list = bss;
1372 __ieee80211_bss_hash_add(wpa_s, bss);
1373 return bss;
1374 }
1375
1376
1377 static struct ieee80211_sta_bss *
1378 ieee80211_bss_get(struct wpa_supplicant *wpa_s, const u8 *bssid)
1379 {
1380 struct ieee80211_sta_bss *bss;
1381
1382 bss = wpa_s->mlme.sta_bss_hash[STA_HASH(bssid)];
1383 while (bss) {
1384 if (os_memcmp(bss->bssid, bssid, ETH_ALEN) == 0)
1385 break;
1386 bss = bss->hnext;
1387 }
1388 return bss;
1389 }
1390
1391
1392 static void ieee80211_bss_free(struct wpa_supplicant *wpa_s,
1393 struct ieee80211_sta_bss *bss)
1394 {
1395 __ieee80211_bss_hash_del(wpa_s, bss);
1396 os_free(bss->ie);
1397 os_free(bss->wpa_ie);
1398 os_free(bss->rsn_ie);
1399 os_free(bss->wmm_ie);
1400 os_free(bss->mdie);
1401 os_free(bss);
1402 }
1403
1404
1405 static void ieee80211_bss_list_deinit(struct wpa_supplicant *wpa_s)
1406 {
1407 struct ieee80211_sta_bss *bss, *prev;
1408
1409 bss = wpa_s->mlme.sta_bss_list;
1410 wpa_s->mlme.sta_bss_list = NULL;
1411 while (bss) {
1412 prev = bss;
1413 bss = bss->next;
1414 ieee80211_bss_free(wpa_s, prev);
1415 }
1416 }
1417
1418
1419 static void ieee80211_bss_info(struct wpa_supplicant *wpa_s,
1420 struct ieee80211_mgmt *mgmt,
1421 size_t len,
1422 struct ieee80211_rx_status *rx_status,
1423 int beacon)
1424 {
1425 struct ieee802_11_elems elems;
1426 size_t baselen;
1427 int channel, invalid = 0, clen;
1428 struct ieee80211_sta_bss *bss;
1429 u64 timestamp;
1430 u8 *pos, *ie_pos;
1431 size_t ie_len;
1432
1433 if (!beacon && os_memcmp(mgmt->da, wpa_s->own_addr, ETH_ALEN))
1434 return; /* ignore ProbeResp to foreign address */
1435
1436 #if 0
1437 wpa_printf(MSG_MSGDUMP, "MLME: RX %s from " MACSTR " to " MACSTR,
1438 beacon ? "Beacon" : "Probe Response",
1439 MAC2STR(mgmt->sa), MAC2STR(mgmt->da));
1440 #endif
1441
1442 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1443 if (baselen > len)
1444 return;
1445
1446 pos = mgmt->u.beacon.timestamp;
1447 timestamp = WPA_GET_LE64(pos);
1448
1449 #if 0 /* FIX */
1450 if (local->conf.mode == IW_MODE_ADHOC && beacon &&
1451 os_memcmp(mgmt->bssid, local->bssid, ETH_ALEN) == 0) {
1452 #ifdef IEEE80211_IBSS_DEBUG
1453 static unsigned long last_tsf_debug = 0;
1454 u64 tsf;
1455 if (local->hw->get_tsf)
1456 tsf = local->hw->get_tsf(local->mdev);
1457 else
1458 tsf = -1LLU;
1459 if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
1460 wpa_printf(MSG_DEBUG, "RX beacon SA=" MACSTR " BSSID="
1461 MACSTR " TSF=0x%llx BCN=0x%llx diff=%lld "
1462 "@%ld",
1463 MAC2STR(mgmt->sa), MAC2STR(mgmt->bssid),
1464 tsf, timestamp, tsf - timestamp, jiffies);
1465 last_tsf_debug = jiffies;
1466 }
1467 #endif /* IEEE80211_IBSS_DEBUG */
1468 }
1469 #endif
1470
1471 ie_pos = mgmt->u.beacon.variable;
1472 ie_len = len - baselen;
1473 if (ieee802_11_parse_elems(ie_pos, ie_len, &elems) == ParseFailed)
1474 invalid = 1;
1475
1476 #if 0 /* FIX */
1477 if (local->conf.mode == IW_MODE_ADHOC && elems.supp_rates &&
1478 os_memcmp(mgmt->bssid, local->bssid, ETH_ALEN) == 0 &&
1479 (sta = sta_info_get(local, mgmt->sa))) {
1480 struct ieee80211_rate *rates;
1481 size_t num_rates;
1482 u32 supp_rates, prev_rates;
1483 int i, j, oper_mode;
1484
1485 rates = local->curr_rates;
1486 num_rates = local->num_curr_rates;
1487 oper_mode = wpa_s->mlme.sta_scanning ?
1488 local->scan_oper_phymode : local->conf.phymode;
1489 for (i = 0; i < local->hw->num_modes; i++) {
1490 struct ieee80211_hw_modes *mode = &local->hw->modes[i];
1491 if (oper_mode == mode->mode) {
1492 rates = mode->rates;
1493 num_rates = mode->num_rates;
1494 break;
1495 }
1496 }
1497
1498 supp_rates = 0;
1499 for (i = 0; i < elems.supp_rates_len +
1500 elems.ext_supp_rates_len; i++) {
1501 u8 rate = 0;
1502 int own_rate;
1503 if (i < elems.supp_rates_len)
1504 rate = elems.supp_rates[i];
1505 else if (elems.ext_supp_rates)
1506 rate = elems.ext_supp_rates
1507 [i - elems.supp_rates_len];
1508 own_rate = 5 * (rate & 0x7f);
1509 if (oper_mode == MODE_ATHEROS_TURBO)
1510 own_rate *= 2;
1511 for (j = 0; j < num_rates; j++)
1512 if (rates[j].rate == own_rate)
1513 supp_rates |= BIT(j);
1514 }
1515
1516 prev_rates = sta->supp_rates;
1517 sta->supp_rates &= supp_rates;
1518 if (sta->supp_rates == 0) {
1519 /* No matching rates - this should not really happen.
1520 * Make sure that at least one rate is marked
1521 * supported to avoid issues with TX rate ctrl. */
1522 sta->supp_rates = wpa_s->mlme.supp_rates_bits;
1523 }
1524 if (sta->supp_rates != prev_rates) {
1525 wpa_printf(MSG_DEBUG, "MLME: updated supp_rates set "
1526 "for " MACSTR " based on beacon info "
1527 "(0x%x & 0x%x -> 0x%x)",
1528 MAC2STR(sta->addr), prev_rates,
1529 supp_rates, sta->supp_rates);
1530 }
1531 sta_info_release(local, sta);
1532 }
1533 #endif
1534
1535 if (elems.ssid == NULL)
1536 return;
1537
1538 if (elems.ds_params && elems.ds_params_len == 1)
1539 channel = elems.ds_params[0];
1540 else
1541 channel = rx_status->channel;
1542
1543 bss = ieee80211_bss_get(wpa_s, mgmt->bssid);
1544 if (bss == NULL) {
1545 bss = ieee80211_bss_add(wpa_s, mgmt->bssid);
1546 if (bss == NULL)
1547 return;
1548 } else {
1549 #if 0
1550 /* TODO: order by RSSI? */
1551 spin_lock_bh(&local->sta_bss_lock);
1552 list_move_tail(&bss->list, &local->sta_bss_list);
1553 spin_unlock_bh(&local->sta_bss_lock);
1554 #endif
1555 }
1556
1557 if (bss->probe_resp && beacon) {
1558 /* Do not allow beacon to override data from Probe Response. */
1559 return;
1560 }
1561
1562 bss->beacon_int = le_to_host16(mgmt->u.beacon.beacon_int);
1563 bss->capability = le_to_host16(mgmt->u.beacon.capab_info);
1564
1565 if (bss->ie == NULL || bss->ie_len < ie_len) {
1566 os_free(bss->ie);
1567 bss->ie = os_malloc(ie_len);
1568 }
1569 if (bss->ie) {
1570 os_memcpy(bss->ie, ie_pos, ie_len);
1571 bss->ie_len = ie_len;
1572 }
1573
1574 if (elems.ssid && elems.ssid_len <= MAX_SSID_LEN) {
1575 os_memcpy(bss->ssid, elems.ssid, elems.ssid_len);
1576 bss->ssid_len = elems.ssid_len;
1577 }
1578
1579 bss->supp_rates_len = 0;
1580 if (elems.supp_rates) {
1581 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1582 if (clen > elems.supp_rates_len)
1583 clen = elems.supp_rates_len;
1584 os_memcpy(&bss->supp_rates[bss->supp_rates_len],
1585 elems.supp_rates, clen);
1586 bss->supp_rates_len += clen;
1587 }
1588 if (elems.ext_supp_rates) {
1589 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1590 if (clen > elems.ext_supp_rates_len)
1591 clen = elems.ext_supp_rates_len;
1592 os_memcpy(&bss->supp_rates[bss->supp_rates_len],
1593 elems.ext_supp_rates, clen);
1594 bss->supp_rates_len += clen;
1595 }
1596
1597 if (elems.wpa &&
1598 (bss->wpa_ie == NULL || bss->wpa_ie_len != elems.wpa_len ||
1599 os_memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
1600 os_free(bss->wpa_ie);
1601 bss->wpa_ie = os_malloc(elems.wpa_len + 2);
1602 if (bss->wpa_ie) {
1603 os_memcpy(bss->wpa_ie, elems.wpa - 2,
1604 elems.wpa_len + 2);
1605 bss->wpa_ie_len = elems.wpa_len + 2;
1606 } else
1607 bss->wpa_ie_len = 0;
1608 } else if (!elems.wpa && bss->wpa_ie) {
1609 os_free(bss->wpa_ie);
1610 bss->wpa_ie = NULL;
1611 bss->wpa_ie_len = 0;
1612 }
1613
1614 if (elems.rsn &&
1615 (bss->rsn_ie == NULL || bss->rsn_ie_len != elems.rsn_len ||
1616 os_memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
1617 os_free(bss->rsn_ie);
1618 bss->rsn_ie = os_malloc(elems.rsn_len + 2);
1619 if (bss->rsn_ie) {
1620 os_memcpy(bss->rsn_ie, elems.rsn - 2,
1621 elems.rsn_len + 2);
1622 bss->rsn_ie_len = elems.rsn_len + 2;
1623 } else
1624 bss->rsn_ie_len = 0;
1625 } else if (!elems.rsn && bss->rsn_ie) {
1626 os_free(bss->rsn_ie);
1627 bss->rsn_ie = NULL;
1628 bss->rsn_ie_len = 0;
1629 }
1630
1631 if (elems.wmm_param &&
1632 (bss->wmm_ie == NULL || bss->wmm_ie_len != elems.wmm_param_len ||
1633 os_memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
1634 os_free(bss->wmm_ie);
1635 bss->wmm_ie = os_malloc(elems.wmm_param_len + 2);
1636 if (bss->wmm_ie) {
1637 os_memcpy(bss->wmm_ie, elems.wmm_param - 2,
1638 elems.wmm_param_len + 2);
1639 bss->wmm_ie_len = elems.wmm_param_len + 2;
1640 } else
1641 bss->wmm_ie_len = 0;
1642 } else if (!elems.wmm_param && bss->wmm_ie) {
1643 os_free(bss->wmm_ie);
1644 bss->wmm_ie = NULL;
1645 bss->wmm_ie_len = 0;
1646 }
1647
1648 #ifdef CONFIG_IEEE80211R
1649 if (elems.mdie &&
1650 (bss->mdie == NULL || bss->mdie_len != elems.mdie_len ||
1651 os_memcmp(bss->mdie, elems.mdie, elems.mdie_len))) {
1652 os_free(bss->mdie);
1653 bss->mdie = os_malloc(elems.mdie_len + 2);
1654 if (bss->mdie) {
1655 os_memcpy(bss->mdie, elems.mdie - 2,
1656 elems.mdie_len + 2);
1657 bss->mdie_len = elems.mdie_len + 2;
1658 } else
1659 bss->mdie_len = 0;
1660 } else if (!elems.mdie && bss->mdie) {
1661 os_free(bss->mdie);
1662 bss->mdie = NULL;
1663 bss->mdie_len = 0;
1664 }
1665 #endif /* CONFIG_IEEE80211R */
1666
1667 bss->hw_mode = wpa_s->mlme.phymode;
1668 bss->channel = channel;
1669 bss->freq = wpa_s->mlme.freq;
1670 if (channel != wpa_s->mlme.channel &&
1671 (wpa_s->mlme.phymode == WPA_MODE_IEEE80211G ||
1672 wpa_s->mlme.phymode == WPA_MODE_IEEE80211B) &&
1673 channel >= 1 && channel <= 14) {
1674 static const int freq_list[] = {
1675 2412, 2417, 2422, 2427, 2432, 2437, 2442,
1676 2447, 2452, 2457, 2462, 2467, 2472, 2484
1677 };
1678 /* IEEE 802.11g/b mode can receive packets from neighboring
1679 * channels, so map the channel into frequency. */
1680 bss->freq = freq_list[channel - 1];
1681 }
1682 bss->timestamp = timestamp;
1683 os_get_time(&bss->last_update);
1684 bss->rssi = rx_status->ssi;
1685 if (!beacon)
1686 bss->probe_resp++;
1687 }
1688
1689
1690 static void ieee80211_rx_mgmt_probe_resp(struct wpa_supplicant *wpa_s,
1691 struct ieee80211_mgmt *mgmt,
1692 size_t len,
1693 struct ieee80211_rx_status *rx_status)
1694 {
1695 ieee80211_bss_info(wpa_s, mgmt, len, rx_status, 0);
1696 }
1697
1698
1699 static void ieee80211_rx_mgmt_beacon(struct wpa_supplicant *wpa_s,
1700 struct ieee80211_mgmt *mgmt,
1701 size_t len,
1702 struct ieee80211_rx_status *rx_status)
1703 {
1704 int use_protection;
1705 size_t baselen;
1706 struct ieee802_11_elems elems;
1707
1708 ieee80211_bss_info(wpa_s, mgmt, len, rx_status, 1);
1709
1710 if (!wpa_s->mlme.associated ||
1711 os_memcmp(wpa_s->bssid, mgmt->bssid, ETH_ALEN) != 0)
1712 return;
1713
1714 /* Process beacon from the current BSS */
1715 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1716 if (baselen > len)
1717 return;
1718
1719 if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen,
1720 &elems) == ParseFailed)
1721 return;
1722
1723 use_protection = 0;
1724 if (elems.erp_info && elems.erp_info_len >= 1) {
1725 use_protection =
1726 (elems.erp_info[0] & ERP_INFO_USE_PROTECTION) != 0;
1727 }
1728
1729 if (use_protection != !!wpa_s->mlme.use_protection) {
1730 wpa_printf(MSG_DEBUG, "MLME: CTS protection %s (BSSID=" MACSTR
1731 ")",
1732 use_protection ? "enabled" : "disabled",
1733 MAC2STR(wpa_s->bssid));
1734 wpa_s->mlme.use_protection = use_protection ? 1 : 0;
1735 wpa_s->mlme.cts_protect_erp_frames = use_protection;
1736 }
1737
1738 if (elems.wmm_param && wpa_s->mlme.wmm_enabled) {
1739 ieee80211_sta_wmm_params(wpa_s, elems.wmm_param,
1740 elems.wmm_param_len);
1741 }
1742 }
1743
1744
1745 static void ieee80211_rx_mgmt_probe_req(struct wpa_supplicant *wpa_s,
1746 struct ieee80211_mgmt *mgmt,
1747 size_t len,
1748 struct ieee80211_rx_status *rx_status)
1749 {
1750 int tx_last_beacon, adhoc;
1751 #if 0 /* FIX */
1752 struct ieee80211_mgmt *resp;
1753 #endif
1754 u8 *pos, *end;
1755 struct wpa_ssid *ssid = wpa_s->current_ssid;
1756
1757 adhoc = ssid && ssid->mode == 1;
1758
1759 if (!adhoc || wpa_s->mlme.state != IEEE80211_IBSS_JOINED ||
1760 len < 24 + 2 || wpa_s->mlme.probe_resp == NULL)
1761 return;
1762
1763 #if 0 /* FIX */
1764 if (local->hw->tx_last_beacon)
1765 tx_last_beacon = local->hw->tx_last_beacon(local->mdev);
1766 else
1767 #endif
1768 tx_last_beacon = 1;
1769
1770 #ifdef IEEE80211_IBSS_DEBUG
1771 wpa_printf(MSG_DEBUG, "MLME: RX ProbeReq SA=" MACSTR " DA=" MACSTR
1772 " BSSID=" MACSTR " (tx_last_beacon=%d)",
1773 MAC2STR(mgmt->sa), MAC2STR(mgmt->da),
1774 MAC2STR(mgmt->bssid), tx_last_beacon);
1775 #endif /* IEEE80211_IBSS_DEBUG */
1776
1777 if (!tx_last_beacon)
1778 return;
1779
1780 if (os_memcmp(mgmt->bssid, wpa_s->bssid, ETH_ALEN) != 0 &&
1781 os_memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1782 return;
1783
1784 end = ((u8 *) mgmt) + len;
1785 pos = mgmt->u.probe_req.variable;
1786 if (pos[0] != WLAN_EID_SSID ||
1787 pos + 2 + pos[1] > end) {
1788 wpa_printf(MSG_DEBUG, "MLME: Invalid SSID IE in ProbeReq from "
1789 MACSTR, MAC2STR(mgmt->sa));
1790 return;
1791 }
1792 if (pos[1] != 0 &&
1793 (pos[1] != wpa_s->mlme.ssid_len ||
1794 os_memcmp(pos + 2, wpa_s->mlme.ssid, wpa_s->mlme.ssid_len) != 0))
1795 {
1796 /* Ignore ProbeReq for foreign SSID */
1797 return;
1798 }
1799
1800 #if 0 /* FIX */
1801 /* Reply with ProbeResp */
1802 skb = skb_copy(wpa_s->mlme.probe_resp, GFP_ATOMIC);
1803 if (skb == NULL)
1804 return;
1805
1806 resp = (struct ieee80211_mgmt *) skb->data;
1807 os_memcpy(resp->da, mgmt->sa, ETH_ALEN);
1808 #ifdef IEEE80211_IBSS_DEBUG
1809 wpa_printf(MSG_DEBUG, "MLME: Sending ProbeResp to " MACSTR,
1810 MAC2STR(resp->da));
1811 #endif /* IEEE80211_IBSS_DEBUG */
1812 ieee80211_sta_tx(wpa_s, skb, 0, 1);
1813 #endif
1814 }
1815
1816
1817 #ifdef CONFIG_IEEE80211R
1818 static void ieee80211_rx_mgmt_ft_action(struct wpa_supplicant *wpa_s,
1819 struct ieee80211_mgmt *mgmt,
1820 size_t len,
1821 struct ieee80211_rx_status *rx_status)
1822 {
1823 union wpa_event_data data;
1824 u16 status;
1825 u8 *sta_addr, *target_ap_addr;
1826
1827 if (len < 24 + 1 + sizeof(mgmt->u.action.u.ft_action_resp)) {
1828 wpa_printf(MSG_DEBUG, "MLME: Too short FT Action frame");
1829 return;
1830 }
1831
1832 /*
1833 * Only FT Action Response is needed for now since reservation
1834 * protocol is not supported.
1835 */
1836 if (mgmt->u.action.u.ft_action_resp.action != 2) {
1837 wpa_printf(MSG_DEBUG, "MLME: Unexpected FT Action %d",
1838 mgmt->u.action.u.ft_action_resp.action);
1839 return;
1840 }
1841
1842 status = le_to_host16(mgmt->u.action.u.ft_action_resp.status_code);
1843 sta_addr = mgmt->u.action.u.ft_action_resp.sta_addr;
1844 target_ap_addr = mgmt->u.action.u.ft_action_resp.target_ap_addr;
1845 wpa_printf(MSG_DEBUG, "MLME: Received FT Action Response: STA " MACSTR
1846 " TargetAP " MACSTR " Status Code %d",
1847 MAC2STR(sta_addr), MAC2STR(target_ap_addr), status);
1848 if (os_memcmp(sta_addr, wpa_s->own_addr, ETH_ALEN) != 0) {
1849 wpa_printf(MSG_DEBUG, "MLME: Foreign STA Address " MACSTR
1850 " in FT Action Response", MAC2STR(sta_addr));
1851 return;
1852
1853 }
1854
1855 if (status) {
1856 wpa_printf(MSG_DEBUG, "MLME: FT Action Response indicates "
1857 "failure (status code %d)", status);
1858 /* TODO: report error to FT code(?) */
1859 return;
1860 }
1861
1862 os_memset(&data, 0, sizeof(data));
1863 data.ft_ies.ies = mgmt->u.action.u.ft_action_resp.variable;
1864 data.ft_ies.ies_len = len - (mgmt->u.action.u.ft_action_resp.variable -
1865 (u8 *) mgmt);
1866 data.ft_ies.ft_action = 1;
1867 os_memcpy(data.ft_ies.target_ap, target_ap_addr, ETH_ALEN);
1868 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &data);
1869 /* TODO: should only re-associate, if EVENT_FT_RESPONSE was processed
1870 * successfully */
1871 wpa_s->mlme.prev_bssid_set = 1;
1872 wpa_s->mlme.auth_alg = WLAN_AUTH_FT;
1873 os_memcpy(wpa_s->mlme.prev_bssid, wpa_s->bssid, ETH_ALEN);
1874 os_memcpy(wpa_s->bssid, target_ap_addr, ETH_ALEN);
1875 ieee80211_associate(wpa_s);
1876 }
1877 #endif /* CONFIG_IEEE80211R */
1878
1879
1880 #ifdef CONFIG_IEEE80211W
1881
1882 /* MLME-PING.response */
1883 static int ieee80211_sta_send_ping_resp(struct wpa_supplicant *wpa_s,
1884 const u8 *addr, const u8 *trans_id)
1885 {
1886 struct ieee80211_mgmt *mgmt;
1887 int res;
1888 size_t len;
1889
1890 mgmt = os_zalloc(sizeof(*mgmt));
1891 if (mgmt == NULL) {
1892 wpa_printf(MSG_DEBUG, "MLME: Failed to allocate buffer for "
1893 "ping action frame");
1894 return -1;
1895 }
1896
1897 len = 24;
1898 os_memcpy(mgmt->da, addr, ETH_ALEN);
1899 os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
1900 os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
1901 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
1902 WLAN_FC_STYPE_ACTION);
1903 mgmt->u.action.category = WLAN_ACTION_PING;
1904 mgmt->u.action.u.ping_resp.action = WLAN_PING_RESPONSE;
1905 os_memcpy(mgmt->u.action.u.ping_resp.trans_id, trans_id,
1906 WLAN_PING_TRANS_ID_LEN);
1907 len += 1 + sizeof(mgmt->u.action.u.ping_resp);
1908
1909 res = ieee80211_sta_tx(wpa_s, (u8 *) mgmt, len);
1910 os_free(mgmt);
1911
1912 return res;
1913 }
1914
1915
1916 static void ieee80211_rx_mgmt_ping_action(
1917 struct wpa_supplicant *wpa_s, struct ieee80211_mgmt *mgmt, size_t len,
1918 struct ieee80211_rx_status *rx_status)
1919 {
1920 if (len < 24 + 1 + sizeof(mgmt->u.action.u.ping_req)) {
1921 wpa_printf(MSG_DEBUG, "MLME: Too short Ping Action frame");
1922 return;
1923 }
1924
1925 if (mgmt->u.action.u.ping_req.action != WLAN_PING_REQUEST) {
1926 wpa_printf(MSG_DEBUG, "MLME: Unexpected Ping Action %d",
1927 mgmt->u.action.u.ping_req.action);
1928 return;
1929 }
1930
1931 if (os_memcmp(mgmt->sa, wpa_s->bssid, ETH_ALEN) != 0) {
1932 wpa_printf(MSG_DEBUG, "MLME: Ignore ping from unknown source "
1933 MACSTR, MAC2STR(mgmt->sa));
1934 return;
1935 }
1936
1937 if (wpa_s->mlme.state == IEEE80211_ASSOCIATE) {
1938 wpa_printf(MSG_DEBUG, "MLME: Ignore ping request during "
1939 "association process");
1940 return;
1941 }
1942
1943 wpa_printf(MSG_DEBUG, "MLME: Replying to ping request");
1944 ieee80211_sta_send_ping_resp(wpa_s, mgmt->sa,
1945 mgmt->u.action.u.ping_req.trans_id);
1946 }
1947
1948 #endif /* CONFIG_IEEE80211W */
1949
1950
1951 static void ieee80211_rx_mgmt_action(struct wpa_supplicant *wpa_s,
1952 struct ieee80211_mgmt *mgmt,
1953 size_t len,
1954 struct ieee80211_rx_status *rx_status)
1955 {
1956 wpa_printf(MSG_DEBUG, "MLME: received Action frame");
1957
1958 if (len < 25)
1959 return;
1960
1961 switch (mgmt->u.action.category) {
1962 #ifdef CONFIG_IEEE80211R
1963 case WLAN_ACTION_FT:
1964 ieee80211_rx_mgmt_ft_action(wpa_s, mgmt, len, rx_status);
1965 break;
1966 #endif /* CONFIG_IEEE80211R */
1967 case WLAN_ACTION_PING:
1968 ieee80211_rx_mgmt_ping_action(wpa_s, mgmt, len, rx_status);
1969 break;
1970 #ifdef CONFIG_IEEE80211W
1971 #endif /* CONFIG_IEEE80211W */
1972 default:
1973 wpa_printf(MSG_DEBUG, "MLME: unknown Action Category %d",
1974 mgmt->u.action.category);
1975 break;
1976 }
1977 }
1978
1979
1980 static void ieee80211_sta_rx_mgmt(struct wpa_supplicant *wpa_s,
1981 const u8 *buf, size_t len,
1982 struct ieee80211_rx_status *rx_status)
1983 {
1984 struct ieee80211_mgmt *mgmt;
1985 u16 fc;
1986
1987 if (len < 24)
1988 return;
1989
1990 mgmt = (struct ieee80211_mgmt *) buf;
1991 fc = le_to_host16(mgmt->frame_control);
1992
1993 switch (WLAN_FC_GET_STYPE(fc)) {
1994 case WLAN_FC_STYPE_PROBE_REQ:
1995 ieee80211_rx_mgmt_probe_req(wpa_s, mgmt, len, rx_status);
1996 break;
1997 case WLAN_FC_STYPE_PROBE_RESP:
1998 ieee80211_rx_mgmt_probe_resp(wpa_s, mgmt, len, rx_status);
1999 break;
2000 case WLAN_FC_STYPE_BEACON:
2001 ieee80211_rx_mgmt_beacon(wpa_s, mgmt, len, rx_status);
2002 break;
2003 case WLAN_FC_STYPE_AUTH:
2004 ieee80211_rx_mgmt_auth(wpa_s, mgmt, len, rx_status);
2005 break;
2006 case WLAN_FC_STYPE_ASSOC_RESP:
2007 ieee80211_rx_mgmt_assoc_resp(wpa_s, mgmt, len, rx_status, 0);
2008 break;
2009 case WLAN_FC_STYPE_REASSOC_RESP:
2010 ieee80211_rx_mgmt_assoc_resp(wpa_s, mgmt, len, rx_status, 1);
2011 break;
2012 case WLAN_FC_STYPE_DEAUTH:
2013 ieee80211_rx_mgmt_deauth(wpa_s, mgmt, len, rx_status);
2014 break;
2015 case WLAN_FC_STYPE_DISASSOC:
2016 ieee80211_rx_mgmt_disassoc(wpa_s, mgmt, len, rx_status);
2017 break;
2018 case WLAN_FC_STYPE_ACTION:
2019 ieee80211_rx_mgmt_action(wpa_s, mgmt, len, rx_status);
2020 break;
2021 default:
2022 wpa_printf(MSG_DEBUG, "MLME: received unknown management "
2023 "frame - stype=%d", WLAN_FC_GET_STYPE(fc));
2024 break;
2025 }
2026 }
2027
2028
2029 static void ieee80211_sta_rx_scan(struct wpa_supplicant *wpa_s,
2030 const u8 *buf, size_t len,
2031 struct ieee80211_rx_status *rx_status)
2032 {
2033 struct ieee80211_mgmt *mgmt;
2034 u16 fc;
2035
2036 if (len < 24)
2037 return;
2038
2039 mgmt = (struct ieee80211_mgmt *) buf;
2040 fc = le_to_host16(mgmt->frame_control);
2041
2042 if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT) {
2043 if (WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_PROBE_RESP) {
2044 ieee80211_rx_mgmt_probe_resp(wpa_s, mgmt,
2045 len, rx_status);
2046 } else if (WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_BEACON) {
2047 ieee80211_rx_mgmt_beacon(wpa_s, mgmt, len, rx_status);
2048 }
2049 }
2050 }
2051
2052
2053 static int ieee80211_sta_active_ibss(struct wpa_supplicant *wpa_s)
2054 {
2055 int active = 0;
2056
2057 #if 0 /* FIX */
2058 list_for_each(ptr, &local->sta_list) {
2059 sta = list_entry(ptr, struct sta_info, list);
2060 if (sta->dev == dev &&
2061 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2062 jiffies)) {
2063 active++;
2064 break;
2065 }
2066 }
2067 #endif
2068
2069 return active;
2070 }
2071
2072
2073 static void ieee80211_sta_expire(struct wpa_supplicant *wpa_s)
2074 {
2075 #if 0 /* FIX */
2076 list_for_each_safe(ptr, n, &local->sta_list) {
2077 sta = list_entry(ptr, struct sta_info, list);
2078 if (time_after(jiffies, sta->last_rx +
2079 IEEE80211_IBSS_INACTIVITY_LIMIT)) {
2080 wpa_printf(MSG_DEBUG, "MLME: expiring inactive STA "
2081 MACSTR, MAC2STR(sta->addr));
2082 sta_info_free(local, sta, 1);
2083 }
2084 }
2085 #endif
2086 }
2087
2088
2089 static void ieee80211_sta_merge_ibss(struct wpa_supplicant *wpa_s)
2090 {
2091 ieee80211_reschedule_timer(wpa_s, IEEE80211_IBSS_MERGE_INTERVAL);
2092
2093 ieee80211_sta_expire(wpa_s);
2094 if (ieee80211_sta_active_ibss(wpa_s))
2095 return;
2096
2097 wpa_printf(MSG_DEBUG, "MLME: No active IBSS STAs - trying to scan for "
2098 "other IBSS networks with same SSID (merge)");
2099 ieee80211_sta_req_scan(wpa_s, wpa_s->mlme.ssid, wpa_s->mlme.ssid_len);
2100 }
2101
2102
2103 static void ieee80211_sta_timer(void *eloop_ctx, void *timeout_ctx)
2104 {
2105 struct wpa_supplicant *wpa_s = eloop_ctx;
2106
2107 switch (wpa_s->mlme.state) {
2108 case IEEE80211_DISABLED:
2109 break;
2110 case IEEE80211_AUTHENTICATE:
2111 ieee80211_authenticate(wpa_s);
2112 break;
2113 case IEEE80211_ASSOCIATE:
2114 ieee80211_associate(wpa_s);
2115 break;
2116 case IEEE80211_ASSOCIATED:
2117 ieee80211_associated(wpa_s);
2118 break;
2119 case IEEE80211_IBSS_SEARCH:
2120 ieee80211_sta_find_ibss(wpa_s);
2121 break;
2122 case IEEE80211_IBSS_JOINED:
2123 ieee80211_sta_merge_ibss(wpa_s);
2124 break;
2125 default:
2126 wpa_printf(MSG_DEBUG, "ieee80211_sta_timer: Unknown state %d",
2127 wpa_s->mlme.state);
2128 break;
2129 }
2130
2131 if (ieee80211_privacy_mismatch(wpa_s)) {
2132 wpa_printf(MSG_DEBUG, "MLME: privacy configuration mismatch "
2133 "and mixed-cell disabled - disassociate");
2134
2135 ieee80211_send_disassoc(wpa_s, WLAN_REASON_UNSPECIFIED);
2136 ieee80211_set_associated(wpa_s, 0);
2137 }
2138 }
2139
2140
2141 static void ieee80211_sta_new_auth(struct wpa_supplicant *wpa_s)
2142 {
2143 struct wpa_ssid *ssid = wpa_s->current_ssid;
2144 if (ssid && ssid->mode != 0)
2145 return;
2146
2147 #if 0 /* FIX */
2148 if (local->hw->reset_tsf) {
2149 /* Reset own TSF to allow time synchronization work. */
2150 local->hw->reset_tsf(local->mdev);
2151 }
2152 #endif
2153
2154 wpa_s->mlme.wmm_last_param_set = -1; /* allow any WMM update */
2155
2156
2157 if (wpa_s->mlme.auth_algs & IEEE80211_AUTH_ALG_OPEN)
2158 wpa_s->mlme.auth_alg = WLAN_AUTH_OPEN;
2159 else if (wpa_s->mlme.auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2160 wpa_s->mlme.auth_alg = WLAN_AUTH_SHARED_KEY;
2161 else if (wpa_s->mlme.auth_algs & IEEE80211_AUTH_ALG_LEAP)
2162 wpa_s->mlme.auth_alg = WLAN_AUTH_LEAP;
2163 else
2164 wpa_s->mlme.auth_alg = WLAN_AUTH_OPEN;
2165 wpa_printf(MSG_DEBUG, "MLME: Initial auth_alg=%d",
2166 wpa_s->mlme.auth_alg);
2167 wpa_s->mlme.auth_transaction = -1;
2168 wpa_s->mlme.auth_tries = wpa_s->mlme.assoc_tries = 0;
2169 ieee80211_authenticate(wpa_s);
2170 }
2171
2172
2173 static int ieee80211_ibss_allowed(struct wpa_supplicant *wpa_s)
2174 {
2175 #if 0 /* FIX */
2176 int m, c;
2177
2178 for (m = 0; m < local->hw->num_modes; m++) {
2179 struct ieee80211_hw_modes *mode = &local->hw->modes[m];
2180 if (mode->mode != local->conf.phymode)
2181 continue;
2182 for (c = 0; c < mode->num_channels; c++) {
2183 struct ieee80211_channel *chan = &mode->channels[c];
2184 if (chan->flag & IEEE80211_CHAN_W_SCAN &&
2185 chan->chan == local->conf.channel) {
2186 if (chan->flag & IEEE80211_CHAN_W_IBSS)
2187 return 1;
2188 break;
2189 }
2190 }
2191 }
2192 #endif
2193
2194 return 0;
2195 }
2196
2197
2198 static int ieee80211_sta_join_ibss(struct wpa_supplicant *wpa_s,
2199 struct ieee80211_sta_bss *bss)
2200 {
2201 int res = 0, rates, done = 0;
2202 struct ieee80211_mgmt *mgmt;
2203 #if 0 /* FIX */
2204 struct ieee80211_tx_control control;
2205 struct ieee80211_rate *rate;
2206 struct rate_control_extra extra;
2207 #endif
2208 u8 *pos, *buf;
2209 size_t len;
2210
2211 /* Remove possible STA entries from other IBSS networks. */
2212 #if 0 /* FIX */
2213 sta_info_flush(local, NULL);
2214
2215 if (local->hw->reset_tsf) {
2216 /* Reset own TSF to allow time synchronization work. */
2217 local->hw->reset_tsf(local->mdev);
2218 }
2219 #endif
2220 os_memcpy(wpa_s->bssid, bss->bssid, ETH_ALEN);
2221
2222 #if 0 /* FIX */
2223 local->conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2224
2225 sdata->drop_unencrypted = bss->capability &
2226 host_to_le16(WLAN_CAPABILITY_PRIVACY) ? 1 : 0;
2227 #endif
2228
2229 #if 0 /* FIX */
2230 os_memset(&rq, 0, sizeof(rq));
2231 rq.m = bss->freq * 100000;
2232 rq.e = 1;
2233 res = ieee80211_ioctl_siwfreq(wpa_s, NULL, &rq, NULL);
2234 #endif
2235
2236 if (!ieee80211_ibss_allowed(wpa_s)) {
2237 #if 0 /* FIX */
2238 wpa_printf(MSG_DEBUG, "MLME: IBSS not allowed on channel %d "
2239 "(%d MHz)", local->conf.channel,
2240 local->conf.freq);
2241 #endif
2242 return -1;
2243 }
2244
2245 /* Set beacon template based on scan results */
2246 buf = os_malloc(400);
2247 len = 0;
2248 do {
2249 if (buf == NULL)
2250 break;
2251
2252 mgmt = (struct ieee80211_mgmt *) buf;
2253 len += 24 + sizeof(mgmt->u.beacon);
2254 os_memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2255 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
2256 WLAN_FC_STYPE_BEACON);
2257 os_memset(mgmt->da, 0xff, ETH_ALEN);
2258 os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
2259 os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
2260 #if 0 /* FIX */
2261 mgmt->u.beacon.beacon_int =
2262 host_to_le16(local->conf.beacon_int);
2263 #endif
2264 mgmt->u.beacon.capab_info = host_to_le16(bss->capability);
2265
2266 pos = buf + len;
2267 len += 2 + wpa_s->mlme.ssid_len;
2268 *pos++ = WLAN_EID_SSID;
2269 *pos++ = wpa_s->mlme.ssid_len;
2270 os_memcpy(pos, wpa_s->mlme.ssid, wpa_s->mlme.ssid_len);
2271
2272 rates = bss->supp_rates_len;
2273 if (rates > 8)
2274 rates = 8;
2275 pos = buf + len;
2276 len += 2 + rates;
2277 *pos++ = WLAN_EID_SUPP_RATES;
2278 *pos++ = rates;
2279 os_memcpy(pos, bss->supp_rates, rates);
2280
2281 pos = buf + len;
2282 len += 2 + 1;
2283 *pos++ = WLAN_EID_DS_PARAMS;
2284 *pos++ = 1;
2285 *pos++ = bss->channel;
2286
2287 pos = buf + len;
2288 len += 2 + 2;
2289 *pos++ = WLAN_EID_IBSS_PARAMS;
2290 *pos++ = 2;
2291 /* FIX: set ATIM window based on scan results */
2292 *pos++ = 0;
2293 *pos++ = 0;
2294
2295 if (bss->supp_rates_len > 8) {
2296 rates = bss->supp_rates_len - 8;
2297 pos = buf + len;
2298 len += 2 + rates;
2299 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2300 *pos++ = rates;
2301 os_memcpy(pos, &bss->supp_rates[8], rates);
2302 }
2303
2304 #if 0 /* FIX */
2305 os_memset(&control, 0, sizeof(control));
2306 control.pkt_type = PKT_PROBE_RESP;
2307 os_memset(&extra, 0, sizeof(extra));
2308 extra.endidx = local->num_curr_rates;
2309 rate = rate_control_get_rate(wpa_s, skb, &extra);
2310 if (rate == NULL) {
2311 wpa_printf(MSG_DEBUG, "MLME: Failed to determine TX "
2312 "rate for IBSS beacon");
2313 break;
2314 }
2315 control.tx_rate = (wpa_s->mlme.short_preamble &&
2316 (rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
2317 rate->val2 : rate->val;
2318 control.antenna_sel = local->conf.antenna_sel;
2319 control.power_level = local->conf.power_level;
2320 control.no_ack = 1;
2321 control.retry_limit = 1;
2322 control.rts_cts_duration = 0;
2323 #endif
2324
2325 #if 0 /* FIX */
2326 wpa_s->mlme.probe_resp = skb_copy(skb, GFP_ATOMIC);
2327 if (wpa_s->mlme.probe_resp) {
2328 mgmt = (struct ieee80211_mgmt *)
2329 wpa_s->mlme.probe_resp->data;
2330 mgmt->frame_control =
2331 IEEE80211_FC(WLAN_FC_TYPE_MGMT,
2332 WLAN_FC_STYPE_PROBE_RESP);
2333 } else {
2334 wpa_printf(MSG_DEBUG, "MLME: Could not allocate "
2335 "ProbeResp template for IBSS");
2336 }
2337
2338 if (local->hw->beacon_update &&
2339 local->hw->beacon_update(wpa_s, skb, &control) == 0) {
2340 wpa_printf(MSG_DEBUG, "MLME: Configured IBSS beacon "
2341 "template based on scan results");
2342 skb = NULL;
2343 }
2344
2345 rates = 0;
2346 for (i = 0; i < bss->supp_rates_len; i++) {
2347 int rate = (bss->supp_rates[i] & 0x7f) * 5;
2348 if (local->conf.phymode == MODE_ATHEROS_TURBO)
2349 rate *= 2;
2350 for (j = 0; j < local->num_curr_rates; j++)
2351 if (local->curr_rates[j].rate == rate)
2352 rates |= BIT(j);
2353 }
2354 wpa_s->mlme.supp_rates_bits = rates;
2355 #endif
2356 done = 1;
2357 } while (0);
2358
2359 os_free(buf);
2360 if (!done) {
2361 wpa_printf(MSG_DEBUG, "MLME: Failed to configure IBSS beacon "
2362 "template");
2363 }
2364
2365 wpa_s->mlme.state = IEEE80211_IBSS_JOINED;
2366 ieee80211_reschedule_timer(wpa_s, IEEE80211_IBSS_MERGE_INTERVAL);
2367
2368 return res;
2369 }
2370
2371
2372 #if 0 /* FIX */
2373 static int ieee80211_sta_create_ibss(struct wpa_supplicant *wpa_s)
2374 {
2375 struct ieee80211_sta_bss *bss;
2376 u8 bssid[ETH_ALEN], *pos;
2377 int i;
2378
2379 #if 0
2380 /* Easier testing, use fixed BSSID. */
2381 os_memset(bssid, 0xfe, ETH_ALEN);
2382 #else
2383 /* Generate random, not broadcast, locally administered BSSID. Mix in
2384 * own MAC address to make sure that devices that do not have proper
2385 * random number generator get different BSSID. */
2386 os_get_random(bssid, ETH_ALEN);
2387 for (i = 0; i < ETH_ALEN; i++)
2388 bssid[i] ^= wpa_s->own_addr[i];
2389 bssid[0] &= ~0x01;
2390 bssid[0] |= 0x02;
2391 #endif
2392
2393 wpa_printf(MSG_DEBUG, "MLME: Creating new IBSS network, BSSID "
2394 MACSTR "", MAC2STR(bssid));
2395
2396 bss = ieee80211_bss_add(wpa_s, bssid);
2397 if (bss == NULL)
2398 return -ENOMEM;
2399
2400 #if 0 /* FIX */
2401 if (local->conf.beacon_int == 0)
2402 local->conf.beacon_int = 100;
2403 bss->beacon_int = local->conf.beacon_int;
2404 bss->hw_mode = local->conf.phymode;
2405 bss->channel = local->conf.channel;
2406 bss->freq = local->conf.freq;
2407 #endif
2408 os_get_time(&bss->last_update);
2409 bss->capability = host_to_le16(WLAN_CAPABILITY_IBSS);
2410 #if 0 /* FIX */
2411 if (sdata->default_key) {
2412 bss->capability |= host_to_le16(WLAN_CAPABILITY_PRIVACY);
2413 } else
2414 sdata->drop_unencrypted = 0;
2415 bss->supp_rates_len = local->num_curr_rates;
2416 #endif
2417 pos = bss->supp_rates;
2418 #if 0 /* FIX */
2419 for (i = 0; i < local->num_curr_rates; i++) {
2420 int rate = local->curr_rates[i].rate;
2421 if (local->conf.phymode == MODE_ATHEROS_TURBO)
2422 rate /= 2;
2423 *pos++ = (u8) (rate / 5);
2424 }
2425 #endif
2426
2427 return ieee80211_sta_join_ibss(wpa_s, bss);
2428 }
2429 #endif
2430
2431
2432 static int ieee80211_sta_find_ibss(struct wpa_supplicant *wpa_s)
2433 {
2434 struct ieee80211_sta_bss *bss;
2435 int found = 0;
2436 u8 bssid[ETH_ALEN];
2437 int active_ibss;
2438 struct os_time now;
2439
2440 if (wpa_s->mlme.ssid_len == 0)
2441 return -EINVAL;
2442
2443 active_ibss = ieee80211_sta_active_ibss(wpa_s);
2444 #ifdef IEEE80211_IBSS_DEBUG
2445 wpa_printf(MSG_DEBUG, "MLME: sta_find_ibss (active_ibss=%d)",
2446 active_ibss);
2447 #endif /* IEEE80211_IBSS_DEBUG */
2448 for (bss = wpa_s->mlme.sta_bss_list; bss; bss = bss->next) {
2449 if (wpa_s->mlme.ssid_len != bss->ssid_len ||
2450 os_memcmp(wpa_s->mlme.ssid, bss->ssid, bss->ssid_len) != 0
2451 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2452 continue;
2453 #ifdef IEEE80211_IBSS_DEBUG
2454 wpa_printf(MSG_DEBUG, " bssid=" MACSTR " found",
2455 MAC2STR(bss->bssid));
2456 #endif /* IEEE80211_IBSS_DEBUG */
2457 os_memcpy(bssid, bss->bssid, ETH_ALEN);
2458 found = 1;
2459 if (active_ibss ||
2460 os_memcmp(bssid, wpa_s->bssid, ETH_ALEN) != 0)
2461 break;
2462 }
2463
2464 #ifdef IEEE80211_IBSS_DEBUG
2465 wpa_printf(MSG_DEBUG, " sta_find_ibss: selected " MACSTR " current "
2466 MACSTR, MAC2STR(bssid), MAC2STR(wpa_s->bssid));
2467 #endif /* IEEE80211_IBSS_DEBUG */
2468 if (found && os_memcmp(wpa_s->bssid, bssid, ETH_ALEN) != 0 &&
2469 (bss = ieee80211_bss_get(wpa_s, bssid))) {
2470 wpa_printf(MSG_DEBUG, "MLME: Selected IBSS BSSID " MACSTR
2471 " based on configured SSID",
2472 MAC2STR(bssid));
2473 return ieee80211_sta_join_ibss(wpa_s, bss);
2474 }
2475 #ifdef IEEE80211_IBSS_DEBUG
2476 wpa_printf(MSG_DEBUG, " did not try to join ibss");
2477 #endif /* IEEE80211_IBSS_DEBUG */
2478
2479 /* Selected IBSS not found in current scan results - try to scan */
2480 os_get_time(&now);
2481 #if 0 /* FIX */
2482 if (wpa_s->mlme.state == IEEE80211_IBSS_JOINED &&
2483 !ieee80211_sta_active_ibss(wpa_s)) {
2484 ieee80211_reschedule_timer(wpa_s,
2485 IEEE80211_IBSS_MERGE_INTERVAL);
2486 } else if (time_after(jiffies, wpa_s->mlme.last_scan_completed +
2487 IEEE80211_SCAN_INTERVAL)) {
2488 wpa_printf(MSG_DEBUG, "MLME: Trigger new scan to find an IBSS "
2489 "to join");
2490 return ieee80211_sta_req_scan(wpa_s->mlme.ssid,
2491 wpa_s->mlme.ssid_len);
2492 } else if (wpa_s->mlme.state != IEEE80211_IBSS_JOINED) {
2493 int interval = IEEE80211_SCAN_INTERVAL;
2494
2495 if (time_after(jiffies, wpa_s->mlme.ibss_join_req +
2496 IEEE80211_IBSS_JOIN_TIMEOUT)) {
2497 if (wpa_s->mlme.create_ibss &&
2498 ieee80211_ibss_allowed(wpa_s))
2499 return ieee80211_sta_create_ibss(wpa_s);
2500 if (wpa_s->mlme.create_ibss) {
2501 wpa_printf(MSG_DEBUG, "MLME: IBSS not allowed "
2502 "on the configured channel %d "
2503 "(%d MHz)",
2504 local->conf.channel,
2505 local->conf.freq);
2506 }
2507
2508 /* No IBSS found - decrease scan interval and continue
2509 * scanning. */
2510 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2511 }
2512
2513 wpa_s->mlme.state = IEEE80211_IBSS_SEARCH;
2514 ieee80211_reschedule_timer(wpa_s, interval);
2515 return 0;
2516 }
2517 #endif
2518
2519 return 0;
2520 }
2521
2522
2523 int ieee80211_sta_get_ssid(struct wpa_supplicant *wpa_s, u8 *ssid,
2524 size_t *len)
2525 {
2526 os_memcpy(ssid, wpa_s->mlme.ssid, wpa_s->mlme.ssid_len);
2527 *len = wpa_s->mlme.ssid_len;
2528 return 0;
2529 }
2530
2531
2532 int ieee80211_sta_associate(struct wpa_supplicant *wpa_s,
2533 struct wpa_driver_associate_params *params)
2534 {
2535 struct ieee80211_sta_bss *bss;
2536
2537 wpa_s->mlme.bssid_set = 0;
2538 wpa_s->mlme.freq = params->freq;
2539 if (params->bssid) {
2540 os_memcpy(wpa_s->bssid, params->bssid, ETH_ALEN);
2541 if (!is_zero_ether_addr(params->bssid))
2542 wpa_s->mlme.bssid_set = 1;
2543 bss = ieee80211_bss_get(wpa_s, wpa_s->bssid);
2544 if (bss) {
2545 wpa_s->mlme.phymode = bss->hw_mode;
2546 wpa_s->mlme.channel = bss->channel;
2547 wpa_s->mlme.freq = bss->freq;
2548 }
2549 }
2550
2551 #if 0 /* FIX */
2552 /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
2553 * not defined. */
2554 if (local->hw->conf_tx) {
2555 struct ieee80211_tx_queue_params qparam;
2556 int i;
2557
2558 os_memset(&qparam, 0, sizeof(qparam));
2559 /* TODO: are these ok defaults for all hw_modes? */
2560 qparam.aifs = 2;
2561 qparam.cw_min =
2562 local->conf.phymode == MODE_IEEE80211B ? 31 : 15;
2563 qparam.cw_max = 1023;
2564 qparam.burst_time = 0;
2565 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
2566 {
2567 local->hw->conf_tx(wpa_s, i + IEEE80211_TX_QUEUE_DATA0,
2568 &qparam);
2569 }
2570 /* IBSS uses different parameters for Beacon sending */
2571 qparam.cw_min++;
2572 qparam.cw_min *= 2;
2573 qparam.cw_min--;
2574 local->hw->conf_tx(wpa_s, IEEE80211_TX_QUEUE_BEACON, &qparam);
2575 }
2576 #endif
2577
2578 if (wpa_s->mlme.ssid_len != params->ssid_len ||
2579 os_memcmp(wpa_s->mlme.ssid, params->ssid, params->ssid_len) != 0)
2580 wpa_s->mlme.prev_bssid_set = 0;
2581 os_memcpy(wpa_s->mlme.ssid, params->ssid, params->ssid_len);
2582 os_memset(wpa_s->mlme.ssid + params->ssid_len, 0,
2583 MAX_SSID_LEN - params->ssid_len);
2584 wpa_s->mlme.ssid_len = params->ssid_len;
2585 wpa_s->mlme.ssid_set = 1;
2586
2587 os_free(wpa_s->mlme.extra_ie);
2588 if (params->wpa_ie == NULL || params->wpa_ie_len == 0) {
2589 wpa_s->mlme.extra_ie = NULL;
2590 wpa_s->mlme.extra_ie_len = 0;
2591 } else {
2592 wpa_s->mlme.extra_ie = os_malloc(params->wpa_ie_len);
2593 if (wpa_s->mlme.extra_ie == NULL) {
2594 wpa_s->mlme.extra_ie_len = 0;
2595 return -1;
2596 }
2597 os_memcpy(wpa_s->mlme.extra_ie, params->wpa_ie,
2598 params->wpa_ie_len);
2599 wpa_s->mlme.extra_ie_len = params->wpa_ie_len;
2600 }
2601
2602 wpa_s->mlme.key_mgmt = params->key_mgmt_suite;
2603
2604 ieee80211_sta_set_channel(wpa_s, wpa_s->mlme.phymode,
2605 wpa_s->mlme.channel, wpa_s->mlme.freq);
2606
2607 if (params->mode == 1 && !wpa_s->mlme.bssid_set) {
2608 os_get_time(&wpa_s->mlme.ibss_join_req);
2609 wpa_s->mlme.state = IEEE80211_IBSS_SEARCH;
2610 return ieee80211_sta_find_ibss(wpa_s);
2611 }
2612
2613 if (wpa_s->mlme.bssid_set)
2614 ieee80211_sta_new_auth(wpa_s);
2615
2616 return 0;
2617 }
2618
2619
2620 static void ieee80211_sta_save_oper_chan(struct wpa_supplicant *wpa_s)
2621 {
2622 wpa_s->mlme.scan_oper_channel = wpa_s->mlme.channel;
2623 wpa_s->mlme.scan_oper_freq = wpa_s->mlme.freq;
2624 wpa_s->mlme.scan_oper_phymode = wpa_s->mlme.phymode;
2625 }
2626
2627
2628 static int ieee80211_sta_restore_oper_chan(struct wpa_supplicant *wpa_s)
2629 {
2630 wpa_s->mlme.channel = wpa_s->mlme.scan_oper_channel;
2631 wpa_s->mlme.freq = wpa_s->mlme.scan_oper_freq;
2632 wpa_s->mlme.phymode = wpa_s->mlme.scan_oper_phymode;
2633 if (wpa_s->mlme.freq == 0)
2634 return 0;
2635 return ieee80211_sta_set_channel(wpa_s, wpa_s->mlme.phymode,
2636 wpa_s->mlme.channel,
2637 wpa_s->mlme.freq);
2638 }
2639
2640
2641 static int ieee80211_active_scan(struct wpa_supplicant *wpa_s)
2642 {
2643 size_t m;
2644 int c;
2645
2646 for (m = 0; m < wpa_s->mlme.num_modes; m++) {
2647 struct wpa_hw_modes *mode = &wpa_s->mlme.modes[m];
2648 if ((int) mode->mode != (int) wpa_s->mlme.phymode)
2649 continue;
2650 for (c = 0; c < mode->num_channels; c++) {
2651 struct wpa_channel_data *chan = &mode->channels[c];
2652 if (chan->flag & WPA_CHAN_W_SCAN &&
2653 chan->chan == wpa_s->mlme.channel) {
2654 if (chan->flag & WPA_CHAN_W_ACTIVE_SCAN)
2655 return 1;
2656 break;
2657 }
2658 }
2659 }
2660
2661 return 0;
2662 }
2663
2664
2665 static void ieee80211_sta_scan_timer(void *eloop_ctx, void *timeout_ctx)
2666 {
2667 struct wpa_supplicant *wpa_s = eloop_ctx;
2668 struct wpa_hw_modes *mode;
2669 struct wpa_channel_data *chan;
2670 int skip = 0;
2671 int timeout = 0;
2672 struct wpa_ssid *ssid = wpa_s->current_ssid;
2673 int adhoc;
2674
2675 if (!wpa_s->mlme.sta_scanning || wpa_s->mlme.modes == NULL)
2676 return;
2677
2678 adhoc = ssid && ssid->mode == 1;
2679
2680 switch (wpa_s->mlme.scan_state) {
2681 case SCAN_SET_CHANNEL:
2682 mode = &wpa_s->mlme.modes[wpa_s->mlme.scan_hw_mode_idx];
2683 if (wpa_s->mlme.scan_hw_mode_idx >=
2684 (int) wpa_s->mlme.num_modes ||
2685 (wpa_s->mlme.scan_hw_mode_idx + 1 ==
2686 (int) wpa_s->mlme.num_modes
2687 && wpa_s->mlme.scan_channel_idx >= mode->num_channels)) {
2688 if (ieee80211_sta_restore_oper_chan(wpa_s)) {
2689 wpa_printf(MSG_DEBUG, "MLME: failed to "
2690 "restore operational channel after "
2691 "scan");
2692 }
2693 wpa_printf(MSG_DEBUG, "MLME: scan completed");
2694 wpa_s->mlme.sta_scanning = 0;
2695 os_get_time(&wpa_s->mlme.last_scan_completed);
2696 wpa_supplicant_event(wpa_s, EVENT_SCAN_RESULTS, NULL);
2697 if (adhoc) {
2698 if (!wpa_s->mlme.bssid_set ||
2699 (wpa_s->mlme.state ==
2700 IEEE80211_IBSS_JOINED &&
2701 !ieee80211_sta_active_ibss(wpa_s)))
2702 ieee80211_sta_find_ibss(wpa_s);
2703 }
2704 return;
2705 }
2706 skip = !(wpa_s->mlme.hw_modes & (1 << mode->mode));
2707 chan = &mode->channels[wpa_s->mlme.scan_channel_idx];
2708 if (!(chan->flag & WPA_CHAN_W_SCAN) ||
2709 (adhoc && !(chan->flag & WPA_CHAN_W_IBSS)) ||
2710 (wpa_s->mlme.hw_modes & (1 << WPA_MODE_IEEE80211G) &&
2711 mode->mode == WPA_MODE_IEEE80211B &&
2712 wpa_s->mlme.scan_skip_11b))
2713 skip = 1;
2714
2715 if (!skip) {
2716 wpa_printf(MSG_MSGDUMP,
2717 "MLME: scan channel %d (%d MHz)",
2718 chan->chan, chan->freq);
2719
2720 wpa_s->mlme.channel = chan->chan;
2721 wpa_s->mlme.freq = chan->freq;
2722 wpa_s->mlme.phymode = mode->mode;
2723 if (ieee80211_sta_set_channel(wpa_s, mode->mode,
2724 chan->chan, chan->freq))
2725 {
2726 wpa_printf(MSG_DEBUG, "MLME: failed to set "
2727 "channel %d (%d MHz) for scan",
2728 chan->chan, chan->freq);
2729 skip = 1;
2730 }
2731 }
2732
2733 wpa_s->mlme.scan_channel_idx++;
2734 if (wpa_s->mlme.scan_channel_idx >=
2735 wpa_s->mlme.modes[wpa_s->mlme.scan_hw_mode_idx].
2736 num_channels) {
2737 wpa_s->mlme.scan_hw_mode_idx++;
2738 wpa_s->mlme.scan_channel_idx = 0;
2739 }
2740
2741 if (skip) {
2742 timeout = 0;
2743 break;
2744 }
2745
2746 timeout = IEEE80211_PROBE_DELAY;
2747 wpa_s->mlme.scan_state = SCAN_SEND_PROBE;
2748 break;
2749 case SCAN_SEND_PROBE:
2750 if (ieee80211_active_scan(wpa_s)) {
2751 ieee80211_send_probe_req(wpa_s, NULL,
2752 wpa_s->mlme.scan_ssid,
2753 wpa_s->mlme.scan_ssid_len);
2754 timeout = IEEE80211_CHANNEL_TIME;
2755 } else {
2756 timeout = IEEE80211_PASSIVE_CHANNEL_TIME;
2757 }
2758 wpa_s->mlme.scan_state = SCAN_SET_CHANNEL;
2759 break;
2760 }
2761
2762 eloop_register_timeout(timeout / 1000, 1000 * (timeout % 1000),
2763 ieee80211_sta_scan_timer, wpa_s, NULL);
2764 }
2765
2766
2767 int ieee80211_sta_req_scan(struct wpa_supplicant *wpa_s, const u8 *ssid,
2768 size_t ssid_len)
2769 {
2770 if (ssid_len > MAX_SSID_LEN)
2771 return -1;
2772
2773 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
2774 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
2775 * BSSID: MACAddress
2776 * SSID
2777 * ScanType: ACTIVE, PASSIVE
2778 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
2779 * a Probe frame during active scanning
2780 * ChannelList
2781 * MinChannelTime (>= ProbeDelay), in TU
2782 * MaxChannelTime: (>= MinChannelTime), in TU
2783 */
2784
2785 /* MLME-SCAN.confirm
2786 * BSSDescriptionSet
2787 * ResultCode: SUCCESS, INVALID_PARAMETERS
2788 */
2789
2790 /* TODO: if assoc, move to power save mode for the duration of the
2791 * scan */
2792
2793 if (wpa_s->mlme.sta_scanning)
2794 return -1;
2795
2796 wpa_printf(MSG_DEBUG, "MLME: starting scan");
2797
2798 ieee80211_sta_save_oper_chan(wpa_s);
2799
2800 wpa_s->mlme.sta_scanning = 1;
2801 /* TODO: stop TX queue? */
2802
2803 if (ssid) {
2804 wpa_s->mlme.scan_ssid_len = ssid_len;
2805 os_memcpy(wpa_s->mlme.scan_ssid, ssid, ssid_len);
2806 } else
2807 wpa_s->mlme.scan_ssid_len = 0;
2808 wpa_s->mlme.scan_skip_11b = 1; /* FIX: clear this is 11g is not
2809 * supported */
2810 wpa_s->mlme.scan_state = SCAN_SET_CHANNEL;
2811 wpa_s->mlme.scan_hw_mode_idx = 0;
2812 wpa_s->mlme.scan_channel_idx = 0;
2813 eloop_register_timeout(0, 1, ieee80211_sta_scan_timer, wpa_s, NULL);
2814
2815 return 0;
2816 }
2817
2818
2819 struct wpa_scan_results *
2820 ieee80211_sta_get_scan_results(struct wpa_supplicant *wpa_s)
2821 {
2822 size_t ap_num = 0;
2823 struct wpa_scan_results *res;
2824 struct wpa_scan_res *r;
2825 struct ieee80211_sta_bss *bss;
2826
2827 res = os_zalloc(sizeof(*res));
2828 for (bss = wpa_s->mlme.sta_bss_list; bss; bss = bss->next)
2829 ap_num++;
2830 res->res = os_zalloc(ap_num * sizeof(struct wpa_scan_res *));
2831 if (res->res == NULL) {
2832 os_free(res);
2833 return NULL;
2834 }
2835
2836 for (bss = wpa_s->mlme.sta_bss_list; bss; bss = bss->next) {
2837 r = os_zalloc(sizeof(*r) + bss->ie_len);
2838 if (r == NULL)
2839 break;
2840 os_memcpy(r->bssid, bss->bssid, ETH_ALEN);
2841 r->freq = bss->freq;
2842 r->beacon_int = bss->beacon_int;
2843 r->caps = bss->capability;
2844 r->level = bss->rssi;
2845 r->tsf = bss->timestamp;
2846 if (bss->ie) {
2847 r->ie_len = bss->ie_len;
2848 os_memcpy(r + 1, bss->ie, bss->ie_len);
2849 }
2850
2851 res->res[res->num++] = r;
2852 }
2853
2854 return res;
2855 }
2856
2857
2858 #if 0 /* FIX */
2859 struct sta_info * ieee80211_ibss_add_sta(struct wpa_supplicant *wpa_s,
2860 struct sk_buff *skb, u8 *bssid,
2861 u8 *addr)
2862 {
2863 struct ieee80211_local *local = dev->priv;
2864 struct list_head *ptr;
2865 struct sta_info *sta;
2866 struct wpa_supplicant *sta_dev = NULL;
2867
2868 /* TODO: Could consider removing the least recently used entry and
2869 * allow new one to be added. */
2870 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
2871 if (net_ratelimit()) {
2872 wpa_printf(MSG_DEBUG, "MLME: No room for a new IBSS "
2873 "STA entry " MACSTR, MAC2STR(addr));
2874 }
2875 return NULL;
2876 }
2877
2878 spin_lock_bh(&local->sub_if_lock);
2879 list_for_each(ptr, &local->sub_if_list) {
2880 sdata = list_entry(ptr, struct ieee80211_sub_if_data, list);
2881 if (sdata->type == IEEE80211_SUB_IF_TYPE_STA &&
2882 os_memcmp(bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
2883 sta_dev = sdata->dev;
2884 break;
2885 }
2886 }
2887 spin_unlock_bh(&local->sub_if_lock);
2888
2889 if (sta_dev == NULL)
2890 return NULL;
2891
2892 wpa_printf(MSG_DEBUG, "MLME: Adding new IBSS station " MACSTR
2893 " (dev=%s)", MAC2STR(addr), sta_dev->name);
2894
2895 sta = sta_info_add(wpa_s, addr);
2896 if (sta == NULL) {
2897 return NULL;
2898 }
2899
2900 sta->dev = sta_dev;
2901 sta->supp_rates = wpa_s->mlme.supp_rates_bits;
2902
2903 rate_control_rate_init(local, sta);
2904
2905 return sta; /* caller will call sta_info_release() */
2906 }
2907 #endif
2908
2909
2910 int ieee80211_sta_deauthenticate(struct wpa_supplicant *wpa_s, u16 reason)
2911 {
2912 wpa_printf(MSG_DEBUG, "MLME: deauthenticate(reason=%d)", reason);
2913
2914 ieee80211_send_deauth(wpa_s, reason);
2915 ieee80211_set_associated(wpa_s, 0);
2916 return 0;
2917 }
2918
2919
2920 int ieee80211_sta_disassociate(struct wpa_supplicant *wpa_s, u16 reason)
2921 {
2922 wpa_printf(MSG_DEBUG, "MLME: disassociate(reason=%d)", reason);
2923
2924 if (!wpa_s->mlme.associated)
2925 return -1;
2926
2927 ieee80211_send_disassoc(wpa_s, reason);
2928 ieee80211_set_associated(wpa_s, 0);
2929 return 0;
2930 }
2931
2932
2933 void ieee80211_sta_rx(struct wpa_supplicant *wpa_s, const u8 *buf, size_t len,
2934 struct ieee80211_rx_status *rx_status)
2935 {
2936 struct ieee80211_mgmt *mgmt;
2937 u16 fc;
2938 const u8 *pos;
2939
2940 /* wpa_hexdump(MSG_MSGDUMP, "MLME: Received frame", buf, len); */
2941
2942 if (wpa_s->mlme.sta_scanning) {
2943 ieee80211_sta_rx_scan(wpa_s, buf, len, rx_status);
2944 return;
2945 }
2946
2947 if (len < 24)
2948 return;
2949
2950 mgmt = (struct ieee80211_mgmt *) buf;
2951 fc = le_to_host16(mgmt->frame_control);
2952
2953 if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT)
2954 ieee80211_sta_rx_mgmt(wpa_s, buf, len, rx_status);
2955 else if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_DATA) {
2956 if ((fc & (WLAN_FC_TODS | WLAN_FC_FROMDS)) !=
2957 WLAN_FC_FROMDS)
2958 return;
2959 /* mgmt->sa is actually BSSID for FromDS data frames */
2960 if (os_memcmp(mgmt->sa, wpa_s->bssid, ETH_ALEN) != 0)
2961 return;
2962 /* Skip IEEE 802.11 and LLC headers */
2963 pos = buf + 24 + 6;
2964 if (WPA_GET_BE16(pos) != ETH_P_EAPOL)
2965 return;
2966 pos += 2;
2967 /* mgmt->bssid is actually BSSID for SA data frames */
2968 wpa_supplicant_rx_eapol(wpa_s, mgmt->bssid,
2969 pos, buf + len - pos);
2970 }
2971 }
2972
2973
2974 void ieee80211_sta_free_hw_features(struct wpa_hw_modes *hw_features,
2975 size_t num_hw_features)
2976 {
2977 size_t i;
2978
2979 if (hw_features == NULL)
2980 return;
2981
2982 for (i = 0; i < num_hw_features; i++) {
2983 os_free(hw_features[i].channels);
2984 os_free(hw_features[i].rates);
2985 }
2986
2987 os_free(hw_features);
2988 }
2989
2990
2991 int ieee80211_sta_init(struct wpa_supplicant *wpa_s)
2992 {
2993 u16 num_modes, flags;
2994
2995 wpa_s->mlme.modes = wpa_drv_get_hw_feature_data(wpa_s, &num_modes,
2996 &flags);
2997 if (wpa_s->mlme.modes == NULL) {
2998 wpa_printf(MSG_ERROR, "MLME: Failed to read supported "
2999 "channels and rates from the driver");
3000 return -1;
3001 }
3002
3003 wpa_s->mlme.num_modes = num_modes;
3004
3005 wpa_s->mlme.hw_modes = 1 << WPA_MODE_IEEE80211A;
3006 wpa_s->mlme.hw_modes |= 1 << WPA_MODE_IEEE80211B;
3007 wpa_s->mlme.hw_modes |= 1 << WPA_MODE_IEEE80211G;
3008
3009 return 0;
3010 }
3011
3012
3013 void ieee80211_sta_deinit(struct wpa_supplicant *wpa_s)
3014 {
3015 eloop_cancel_timeout(ieee80211_sta_timer, wpa_s, NULL);
3016 eloop_cancel_timeout(ieee80211_sta_scan_timer, wpa_s, NULL);
3017 os_free(wpa_s->mlme.extra_ie);
3018 wpa_s->mlme.extra_ie = NULL;
3019 os_free(wpa_s->mlme.extra_probe_ie);
3020 wpa_s->mlme.extra_probe_ie = NULL;
3021 os_free(wpa_s->mlme.assocreq_ies);
3022 wpa_s->mlme.assocreq_ies = NULL;
3023 os_free(wpa_s->mlme.assocresp_ies);
3024 wpa_s->mlme.assocresp_ies = NULL;
3025 ieee80211_bss_list_deinit(wpa_s);
3026 ieee80211_sta_free_hw_features(wpa_s->mlme.modes,
3027 wpa_s->mlme.num_modes);
3028 #ifdef CONFIG_IEEE80211R
3029 os_free(wpa_s->mlme.ft_ies);
3030 wpa_s->mlme.ft_ies = NULL;
3031 wpa_s->mlme.ft_ies_len = 0;
3032 #endif /* CONFIG_IEEE80211R */
3033 }
3034
3035
3036 #ifdef CONFIG_IEEE80211R
3037
3038 int ieee80211_sta_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
3039 const u8 *ies, size_t ies_len)
3040 {
3041 if (md == NULL) {
3042 wpa_printf(MSG_DEBUG, "MLME: Clear FT mobility domain");
3043 os_memset(wpa_s->mlme.current_md, 0, MOBILITY_DOMAIN_ID_LEN);
3044 } else {
3045 wpa_printf(MSG_DEBUG, "MLME: Update FT IEs for MD " MACSTR,
3046 MAC2STR(md));
3047 os_memcpy(wpa_s->mlme.current_md, md, MOBILITY_DOMAIN_ID_LEN);
3048 }
3049
3050 wpa_hexdump(MSG_DEBUG, "MLME: FT IEs", ies, ies_len);
3051 os_free(wpa_s->mlme.ft_ies);
3052 wpa_s->mlme.ft_ies = os_malloc(ies_len);
3053 if (wpa_s->mlme.ft_ies == NULL)
3054 return -1;
3055 os_memcpy(wpa_s->mlme.ft_ies, ies, ies_len);
3056 wpa_s->mlme.ft_ies_len = ies_len;
3057
3058 return 0;
3059 }
3060
3061
3062 int ieee80211_sta_send_ft_action(struct wpa_supplicant *wpa_s, u8 action,
3063 const u8 *target_ap,
3064 const u8 *ies, size_t ies_len)
3065 {
3066 u8 *buf;
3067 size_t len;
3068 struct ieee80211_mgmt *mgmt;
3069 int res;
3070
3071 /*
3072 * Action frame payload:
3073 * Category[1] = 6 (Fast BSS Transition)
3074 * Action[1] = 1 (Fast BSS Transition Request)
3075 * STA Address
3076 * Target AP Address
3077 * FT IEs
3078 */
3079
3080 buf = os_zalloc(sizeof(*mgmt) + ies_len);
3081 if (buf == NULL) {
3082 wpa_printf(MSG_DEBUG, "MLME: Failed to allocate buffer for "
3083 "FT action frame");
3084 return -1;
3085 }
3086
3087 mgmt = (struct ieee80211_mgmt *) buf;
3088 len = 24;
3089 os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
3090 os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
3091 os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
3092 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
3093 WLAN_FC_STYPE_ACTION);
3094 mgmt->u.action.category = WLAN_ACTION_FT;
3095 mgmt->u.action.u.ft_action_req.action = action;
3096 os_memcpy(mgmt->u.action.u.ft_action_req.sta_addr, wpa_s->own_addr,
3097 ETH_ALEN);
3098 os_memcpy(mgmt->u.action.u.ft_action_req.target_ap_addr, target_ap,
3099 ETH_ALEN);
3100 os_memcpy(mgmt->u.action.u.ft_action_req.variable, ies, ies_len);
3101 len += 1 + sizeof(mgmt->u.action.u.ft_action_req) + ies_len;
3102
3103 wpa_printf(MSG_DEBUG, "MLME: Send FT Action Frame: Action=%d "
3104 "Target AP=" MACSTR " body_len=%d",
3105 action, MAC2STR(target_ap), ies_len);
3106
3107 res = ieee80211_sta_tx(wpa_s, buf, len);
3108 os_free(buf);
3109
3110 return res;
3111 }
3112
3113 #endif /* CONFIG_IEEE80211R */
3114
3115
3116 int ieee80211_sta_set_probe_req_ie(struct wpa_supplicant *wpa_s, const u8 *ies,
3117 size_t ies_len)
3118 {
3119 os_free(wpa_s->mlme.extra_probe_ie);
3120 wpa_s->mlme.extra_probe_ie = NULL;
3121 wpa_s->mlme.extra_probe_ie_len = 0;
3122
3123 if (ies == NULL)
3124 return 0;
3125
3126 wpa_s->mlme.extra_probe_ie = os_malloc(ies_len);
3127 if (wpa_s->mlme.extra_probe_ie == NULL)
3128 return -1;
3129
3130 os_memcpy(wpa_s->mlme.extra_probe_ie, ies, ies_len);
3131 wpa_s->mlme.extra_probe_ie_len = ies_len;
3132
3133 return 0;
3134 }
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