1 /*
2 * wpa_supplicant - SME
3 * Copyright (c) 2009-2010, Jouni Malinen <j@w1.fi>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * Alternatively, this software may be distributed under the terms of BSD
10 * license.
11 *
12 * See README and COPYING for more details.
13 */
15 #include "includes.h"
17 #include "common.h"
18 #include "utils/eloop.h"
19 #include "common/ieee802_11_defs.h"
20 #include "common/ieee802_11_common.h"
21 #include "eapol_supp/eapol_supp_sm.h"
22 #include "common/wpa_common.h"
23 #include "rsn_supp/wpa.h"
24 #include "rsn_supp/pmksa_cache.h"
25 #include "config.h"
26 #include "wpa_supplicant_i.h"
27 #include "driver_i.h"
28 #include "wpas_glue.h"
29 #include "wps_supplicant.h"
30 #include "p2p_supplicant.h"
31 #include "notify.h"
32 #include "bss.h"
33 #include "scan.h"
34 #include "sme.h"
36 #define SME_AUTH_TIMEOUT 5
37 #define SME_ASSOC_TIMEOUT 5
39 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx);
40 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx);
41 #ifdef CONFIG_IEEE80211W
42 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s);
43 #endif /* CONFIG_IEEE80211W */
46 void sme_authenticate(struct wpa_supplicant *wpa_s,
47 struct wpa_bss *bss, struct wpa_ssid *ssid)
48 {
49 struct wpa_driver_auth_params params;
50 struct wpa_ssid *old_ssid;
51 #ifdef CONFIG_IEEE80211R
52 const u8 *ie;
53 #endif /* CONFIG_IEEE80211R */
54 #ifdef CONFIG_IEEE80211R
55 const u8 *md = NULL;
56 #endif /* CONFIG_IEEE80211R */
57 int i, bssid_changed;
59 if (bss == NULL) {
60 wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for "
61 "the network");
62 return;
63 }
65 wpa_s->current_bss = bss;
67 os_memset(¶ms, 0, sizeof(params));
68 wpa_s->reassociate = 0;
70 params.freq = bss->freq;
71 params.bssid = bss->bssid;
72 params.ssid = bss->ssid;
73 params.ssid_len = bss->ssid_len;
74 params.p2p = ssid->p2p_group;
76 if (wpa_s->sme.ssid_len != params.ssid_len ||
77 os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
78 wpa_s->sme.prev_bssid_set = 0;
80 wpa_s->sme.freq = params.freq;
81 os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
82 wpa_s->sme.ssid_len = params.ssid_len;
84 params.auth_alg = WPA_AUTH_ALG_OPEN;
85 #ifdef IEEE8021X_EAPOL
86 if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
87 if (ssid->leap) {
88 if (ssid->non_leap == 0)
89 params.auth_alg = WPA_AUTH_ALG_LEAP;
90 else
91 params.auth_alg |= WPA_AUTH_ALG_LEAP;
92 }
93 }
94 #endif /* IEEE8021X_EAPOL */
95 wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
96 params.auth_alg);
97 if (ssid->auth_alg) {
98 params.auth_alg = ssid->auth_alg;
99 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
100 "0x%x", params.auth_alg);
101 }
103 for (i = 0; i < NUM_WEP_KEYS; i++) {
104 if (ssid->wep_key_len[i])
105 params.wep_key[i] = ssid->wep_key[i];
106 params.wep_key_len[i] = ssid->wep_key_len[i];
107 }
108 params.wep_tx_keyidx = ssid->wep_tx_keyidx;
110 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
111 os_memset(wpa_s->bssid, 0, ETH_ALEN);
112 os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
113 if (bssid_changed)
114 wpas_notify_bssid_changed(wpa_s);
116 if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
117 wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
118 wpa_key_mgmt_wpa(ssid->key_mgmt)) {
119 int try_opportunistic;
120 try_opportunistic = ssid->proactive_key_caching &&
121 (ssid->proto & WPA_PROTO_RSN);
122 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
123 wpa_s->current_ssid,
124 try_opportunistic) == 0)
125 eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
126 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
127 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
128 wpa_s->sme.assoc_req_ie,
129 &wpa_s->sme.assoc_req_ie_len)) {
130 wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
131 "key management and encryption suites");
132 return;
133 }
134 } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
135 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
136 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
137 wpa_s->sme.assoc_req_ie,
138 &wpa_s->sme.assoc_req_ie_len)) {
139 wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
140 "key management and encryption suites (no "
141 "scan results)");
142 return;
143 }
144 #ifdef CONFIG_WPS
145 } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
146 struct wpabuf *wps_ie;
147 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
148 if (wps_ie && wpabuf_len(wps_ie) <=
149 sizeof(wpa_s->sme.assoc_req_ie)) {
150 wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
151 os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
152 wpa_s->sme.assoc_req_ie_len);
153 } else
154 wpa_s->sme.assoc_req_ie_len = 0;
155 wpabuf_free(wps_ie);
156 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
157 #endif /* CONFIG_WPS */
158 } else {
159 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
160 wpa_s->sme.assoc_req_ie_len = 0;
161 }
163 #ifdef CONFIG_IEEE80211R
164 ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
165 if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
166 md = ie + 2;
167 wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
168 if (md) {
169 /* Prepare for the next transition */
170 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
171 }
173 if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) {
174 if (wpa_s->sme.assoc_req_ie_len + 5 <
175 sizeof(wpa_s->sme.assoc_req_ie)) {
176 struct rsn_mdie *mdie;
177 u8 *pos = wpa_s->sme.assoc_req_ie +
178 wpa_s->sme.assoc_req_ie_len;
179 *pos++ = WLAN_EID_MOBILITY_DOMAIN;
180 *pos++ = sizeof(*mdie);
181 mdie = (struct rsn_mdie *) pos;
182 os_memcpy(mdie->mobility_domain, md,
183 MOBILITY_DOMAIN_ID_LEN);
184 mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
185 wpa_s->sme.assoc_req_ie_len += 5;
186 }
188 if (wpa_s->sme.ft_used &&
189 os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
190 wpa_sm_has_ptk(wpa_s->wpa)) {
191 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT "
192 "over-the-air");
193 params.auth_alg = WPA_AUTH_ALG_FT;
194 params.ie = wpa_s->sme.ft_ies;
195 params.ie_len = wpa_s->sme.ft_ies_len;
196 }
197 }
198 #endif /* CONFIG_IEEE80211R */
200 #ifdef CONFIG_IEEE80211W
201 wpa_s->sme.mfp = ssid->ieee80211w;
202 if (ssid->ieee80211w != NO_MGMT_FRAME_PROTECTION) {
203 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
204 struct wpa_ie_data _ie;
205 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
206 _ie.capabilities &
207 (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
208 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
209 "MFP: require MFP");
210 wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
211 }
212 }
213 #endif /* CONFIG_IEEE80211W */
215 #ifdef CONFIG_P2P
216 if (wpa_s->global->p2p) {
217 u8 *pos;
218 size_t len;
219 int res;
220 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
221 len = sizeof(wpa_s->sme.assoc_req_ie) -
222 wpa_s->sme.assoc_req_ie_len;
223 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
224 ssid->p2p_group);
225 if (res >= 0)
226 wpa_s->sme.assoc_req_ie_len += res;
227 }
228 #endif /* CONFIG_P2P */
230 #ifdef CONFIG_INTERWORKING
231 if (wpa_s->conf->interworking) {
232 u8 *pos = wpa_s->sme.assoc_req_ie;
233 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
234 pos += 2 + pos[1];
235 os_memmove(pos + 6, pos,
236 wpa_s->sme.assoc_req_ie_len -
237 (pos - wpa_s->sme.assoc_req_ie));
238 wpa_s->sme.assoc_req_ie_len += 6;
239 *pos++ = WLAN_EID_EXT_CAPAB;
240 *pos++ = 4;
241 *pos++ = 0x00;
242 *pos++ = 0x00;
243 *pos++ = 0x00;
244 *pos++ = 0x80; /* Bit 31 - Interworking */
245 }
246 #endif /* CONFIG_INTERWORKING */
248 wpa_supplicant_cancel_sched_scan(wpa_s);
249 wpa_supplicant_cancel_scan(wpa_s);
251 wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
252 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
253 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
255 wpa_clear_keys(wpa_s, bss->bssid);
256 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
257 old_ssid = wpa_s->current_ssid;
258 wpa_s->current_ssid = ssid;
259 wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
260 wpa_supplicant_initiate_eapol(wpa_s);
261 if (old_ssid != wpa_s->current_ssid)
262 wpas_notify_network_changed(wpa_s);
264 wpa_s->sme.auth_alg = params.auth_alg;
265 if (wpa_drv_authenticate(wpa_s, ¶ms) < 0) {
266 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
267 "driver failed");
268 wpas_connection_failed(wpa_s, bss->bssid);
269 wpa_supplicant_mark_disassoc(wpa_s);
270 return;
271 }
273 eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
274 NULL);
276 /*
277 * Association will be started based on the authentication event from
278 * the driver.
279 */
280 }
283 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
284 {
285 struct wpa_ssid *ssid = wpa_s->current_ssid;
287 if (ssid == NULL) {
288 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
289 "when network is not selected");
290 return;
291 }
293 if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
294 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
295 "when not in authenticating state");
296 return;
297 }
299 if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
300 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
301 "unexpected peer " MACSTR,
302 MAC2STR(data->auth.peer));
303 return;
304 }
306 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
307 " auth_type=%d status_code=%d",
308 MAC2STR(data->auth.peer), data->auth.auth_type,
309 data->auth.status_code);
310 wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
311 data->auth.ies, data->auth.ies_len);
313 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
315 if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
316 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
317 "code %d)", data->auth.status_code);
319 if (data->auth.status_code !=
320 WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
321 wpa_s->sme.auth_alg == data->auth.auth_type ||
322 wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
323 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
324 return;
325 }
327 switch (data->auth.auth_type) {
328 case WLAN_AUTH_OPEN:
329 wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
331 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
332 wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
333 wpa_s->current_ssid);
334 return;
336 case WLAN_AUTH_SHARED_KEY:
337 wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
339 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
340 wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
341 wpa_s->current_ssid);
342 return;
344 default:
345 return;
346 }
347 }
349 #ifdef CONFIG_IEEE80211R
350 if (data->auth.auth_type == WLAN_AUTH_FT) {
351 union wpa_event_data edata;
352 os_memset(&edata, 0, sizeof(edata));
353 edata.ft_ies.ies = data->auth.ies;
354 edata.ft_ies.ies_len = data->auth.ies_len;
355 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
356 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
357 }
358 #endif /* CONFIG_IEEE80211R */
360 sme_associate(wpa_s, ssid->mode, data->auth.peer,
361 data->auth.auth_type);
362 }
365 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
366 const u8 *bssid, u16 auth_type)
367 {
368 struct wpa_driver_associate_params params;
369 struct ieee802_11_elems elems;
370 #ifdef CONFIG_HT_OVERRIDES
371 struct ieee80211_ht_capabilities htcaps;
372 struct ieee80211_ht_capabilities htcaps_mask;
373 #endif /* CONFIG_HT_OVERRIDES */
375 os_memset(¶ms, 0, sizeof(params));
376 params.bssid = bssid;
377 params.ssid = wpa_s->sme.ssid;
378 params.ssid_len = wpa_s->sme.ssid_len;
379 params.freq = wpa_s->sme.freq;
380 params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
381 wpa_s->sme.assoc_req_ie : NULL;
382 params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
383 params.pairwise_suite = cipher_suite2driver(wpa_s->pairwise_cipher);
384 params.group_suite = cipher_suite2driver(wpa_s->group_cipher);
385 #ifdef CONFIG_HT_OVERRIDES
386 os_memset(&htcaps, 0, sizeof(htcaps));
387 os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
388 params.htcaps = (u8 *) &htcaps;
389 params.htcaps_mask = (u8 *) &htcaps_mask;
390 wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, ¶ms);
391 #endif /* CONFIG_HT_OVERRIDES */
392 #ifdef CONFIG_IEEE80211R
393 if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
394 params.wpa_ie = wpa_s->sme.ft_ies;
395 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
396 }
397 #endif /* CONFIG_IEEE80211R */
398 params.mode = mode;
399 params.mgmt_frame_protection = wpa_s->sme.mfp;
400 if (wpa_s->sme.prev_bssid_set)
401 params.prev_bssid = wpa_s->sme.prev_bssid;
403 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
404 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
405 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
406 params.freq);
408 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
410 if (params.wpa_ie == NULL ||
411 ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
412 < 0) {
413 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
414 os_memset(&elems, 0, sizeof(elems));
415 }
416 if (elems.rsn_ie) {
417 params.wpa_proto = WPA_PROTO_RSN;
418 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
419 elems.rsn_ie_len + 2);
420 } else if (elems.wpa_ie) {
421 params.wpa_proto = WPA_PROTO_WPA;
422 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
423 elems.wpa_ie_len + 2);
424 } else
425 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
426 if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
427 params.p2p = 1;
429 if (wpa_s->parent->set_sta_uapsd)
430 params.uapsd = wpa_s->parent->sta_uapsd;
431 else
432 params.uapsd = -1;
434 if (wpa_drv_associate(wpa_s, ¶ms) < 0) {
435 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
436 "driver failed");
437 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
438 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
439 return;
440 }
442 eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
443 NULL);
444 }
447 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
448 const u8 *ies, size_t ies_len)
449 {
450 if (md == NULL || ies == NULL) {
451 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
452 os_free(wpa_s->sme.ft_ies);
453 wpa_s->sme.ft_ies = NULL;
454 wpa_s->sme.ft_ies_len = 0;
455 wpa_s->sme.ft_used = 0;
456 return 0;
457 }
459 os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
460 wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
461 os_free(wpa_s->sme.ft_ies);
462 wpa_s->sme.ft_ies = os_malloc(ies_len);
463 if (wpa_s->sme.ft_ies == NULL)
464 return -1;
465 os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
466 wpa_s->sme.ft_ies_len = ies_len;
467 return 0;
468 }
471 static void sme_deauth(struct wpa_supplicant *wpa_s)
472 {
473 int bssid_changed;
475 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
477 if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
478 WLAN_REASON_DEAUTH_LEAVING) < 0) {
479 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
480 "failed");
481 }
482 wpa_s->sme.prev_bssid_set = 0;
484 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
485 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
486 os_memset(wpa_s->bssid, 0, ETH_ALEN);
487 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
488 if (bssid_changed)
489 wpas_notify_bssid_changed(wpa_s);
490 }
493 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
494 union wpa_event_data *data)
495 {
496 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
497 "status code %d", MAC2STR(wpa_s->pending_bssid),
498 data->assoc_reject.status_code);
500 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
502 /*
503 * For now, unconditionally terminate the previous authentication. In
504 * theory, this should not be needed, but mac80211 gets quite confused
505 * if the authentication is left pending.. Some roaming cases might
506 * benefit from using the previous authentication, so this could be
507 * optimized in the future.
508 */
509 sme_deauth(wpa_s);
510 }
513 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
514 union wpa_event_data *data)
515 {
516 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
517 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
518 wpa_supplicant_mark_disassoc(wpa_s);
519 }
522 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
523 union wpa_event_data *data)
524 {
525 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
526 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
527 wpa_supplicant_mark_disassoc(wpa_s);
528 }
531 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
532 union wpa_event_data *data)
533 {
534 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
535 if (wpa_s->sme.prev_bssid_set) {
536 /*
537 * cfg80211/mac80211 can get into somewhat confused state if
538 * the AP only disassociates us and leaves us in authenticated
539 * state. For now, force the state to be cleared to avoid
540 * confusing errors if we try to associate with the AP again.
541 */
542 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
543 "driver state");
544 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
545 WLAN_REASON_DEAUTH_LEAVING);
546 }
547 }
550 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
551 {
552 struct wpa_supplicant *wpa_s = eloop_ctx;
553 if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
554 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
555 sme_deauth(wpa_s);
556 }
557 }
560 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
561 {
562 struct wpa_supplicant *wpa_s = eloop_ctx;
563 if (wpa_s->wpa_state == WPA_ASSOCIATING) {
564 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
565 sme_deauth(wpa_s);
566 }
567 }
570 void sme_state_changed(struct wpa_supplicant *wpa_s)
571 {
572 /* Make sure timers are cleaned up appropriately. */
573 if (wpa_s->wpa_state != WPA_ASSOCIATING)
574 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
575 if (wpa_s->wpa_state != WPA_AUTHENTICATING)
576 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
577 }
580 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
581 const u8 *prev_pending_bssid)
582 {
583 /*
584 * mac80211-workaround to force deauth on failed auth cmd,
585 * requires us to remain in authenticating state to allow the
586 * second authentication attempt to be continued properly.
587 */
588 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
589 "to proceed after disconnection event");
590 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
591 os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
593 /*
594 * Re-arm authentication timer in case auth fails for whatever reason.
595 */
596 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
597 eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
598 NULL);
599 }
602 void sme_deinit(struct wpa_supplicant *wpa_s)
603 {
604 os_free(wpa_s->sme.ft_ies);
605 wpa_s->sme.ft_ies = NULL;
606 wpa_s->sme.ft_ies_len = 0;
607 #ifdef CONFIG_IEEE80211W
608 sme_stop_sa_query(wpa_s);
609 #endif /* CONFIG_IEEE80211W */
611 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
612 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
613 }
616 #ifdef CONFIG_IEEE80211W
618 static const unsigned int sa_query_max_timeout = 1000;
619 static const unsigned int sa_query_retry_timeout = 201;
621 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
622 {
623 u32 tu;
624 struct os_time now, passed;
625 os_get_time(&now);
626 os_time_sub(&now, &wpa_s->sme.sa_query_start, &passed);
627 tu = (passed.sec * 1000000 + passed.usec) / 1024;
628 if (sa_query_max_timeout < tu) {
629 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
630 sme_stop_sa_query(wpa_s);
631 wpa_supplicant_deauthenticate(
632 wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
633 return 1;
634 }
636 return 0;
637 }
640 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
641 const u8 *trans_id)
642 {
643 u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
644 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
645 MACSTR, MAC2STR(wpa_s->bssid));
646 wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
647 trans_id, WLAN_SA_QUERY_TR_ID_LEN);
648 req[0] = WLAN_ACTION_SA_QUERY;
649 req[1] = WLAN_SA_QUERY_REQUEST;
650 os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
651 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
652 wpa_s->own_addr, wpa_s->bssid,
653 req, sizeof(req), 0) < 0)
654 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
655 "Request");
656 }
659 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
660 {
661 struct wpa_supplicant *wpa_s = eloop_ctx;
662 unsigned int timeout, sec, usec;
663 u8 *trans_id, *nbuf;
665 if (wpa_s->sme.sa_query_count > 0 &&
666 sme_check_sa_query_timeout(wpa_s))
667 return;
669 nbuf = os_realloc(wpa_s->sme.sa_query_trans_id,
670 (wpa_s->sme.sa_query_count + 1) *
671 WLAN_SA_QUERY_TR_ID_LEN);
672 if (nbuf == NULL)
673 return;
674 if (wpa_s->sme.sa_query_count == 0) {
675 /* Starting a new SA Query procedure */
676 os_get_time(&wpa_s->sme.sa_query_start);
677 }
678 trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
679 wpa_s->sme.sa_query_trans_id = nbuf;
680 wpa_s->sme.sa_query_count++;
682 os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
684 timeout = sa_query_retry_timeout;
685 sec = ((timeout / 1000) * 1024) / 1000;
686 usec = (timeout % 1000) * 1024;
687 eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
689 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
690 wpa_s->sme.sa_query_count);
692 sme_send_sa_query_req(wpa_s, trans_id);
693 }
696 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
697 {
698 sme_sa_query_timer(wpa_s, NULL);
699 }
702 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
703 {
704 eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
705 os_free(wpa_s->sme.sa_query_trans_id);
706 wpa_s->sme.sa_query_trans_id = NULL;
707 wpa_s->sme.sa_query_count = 0;
708 }
711 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
712 const u8 *da, u16 reason_code)
713 {
714 struct wpa_ssid *ssid;
716 if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME))
717 return;
718 if (wpa_s->wpa_state != WPA_COMPLETED)
719 return;
720 ssid = wpa_s->current_ssid;
721 if (ssid == NULL || ssid->ieee80211w == 0)
722 return;
723 if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
724 return;
725 if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
726 reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
727 return;
728 if (wpa_s->sme.sa_query_count > 0)
729 return;
731 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
732 "possible AP/STA state mismatch - trigger SA Query");
733 sme_start_sa_query(wpa_s);
734 }
737 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
738 const u8 *data, size_t len)
739 {
740 int i;
742 if (wpa_s->sme.sa_query_trans_id == NULL ||
743 len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
744 data[0] != WLAN_SA_QUERY_RESPONSE)
745 return;
746 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
747 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
749 if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
750 return;
752 for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
753 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
754 i * WLAN_SA_QUERY_TR_ID_LEN,
755 data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
756 break;
757 }
759 if (i >= wpa_s->sme.sa_query_count) {
760 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
761 "transaction identifier found");
762 return;
763 }
765 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
766 "from " MACSTR, MAC2STR(sa));
767 sme_stop_sa_query(wpa_s);
768 }
770 #endif /* CONFIG_IEEE80211W */