3 * Copyright (c) 2009-2010, Jouni Malinen <j@w1.fi>
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
12 #include "utils/eloop.h"
13 #include "common/ieee802_11_defs.h"
14 #include "common/ieee802_11_common.h"
15 #include "eapol_supp/eapol_supp_sm.h"
16 #include "common/wpa_common.h"
17 #include "rsn_supp/wpa.h"
18 #include "rsn_supp/pmksa_cache.h"
20 #include "wpa_supplicant_i.h"
22 #include "wpas_glue.h"
23 #include "wps_supplicant.h"
24 #include "p2p_supplicant.h"
29 #include "hs20_supplicant.h"
31 #define SME_AUTH_TIMEOUT 5
32 #define SME_ASSOC_TIMEOUT 5
34 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx);
35 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx);
36 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx);
37 #ifdef CONFIG_IEEE80211W
38 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s);
39 #endif /* CONFIG_IEEE80211W */
44 static struct wpabuf * sme_auth_build_sae_commit(struct wpa_supplicant *wpa_s)
48 buf = wpabuf_alloc(4 + 2);
52 wpabuf_put_le16(buf, 1); /* Transaction seq# */
53 wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
54 wpabuf_put_le16(buf, 19); /* Finite Cyclic Group */
55 /* TODO: Anti-Clogging Token (if requested) */
63 static struct wpabuf * sme_auth_build_sae_confirm(struct wpa_supplicant *wpa_s)
67 buf = wpabuf_alloc(4 + 2);
71 wpabuf_put_le16(buf, 2); /* Transaction seq# */
72 wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
73 wpabuf_put_le16(buf, wpa_s->sme.sae_send_confirm);
74 wpa_s->sme.sae_send_confirm++;
80 #endif /* CONFIG_SAE */
83 static void sme_send_authentication(struct wpa_supplicant *wpa_s,
84 struct wpa_bss *bss, struct wpa_ssid *ssid,
87 struct wpa_driver_auth_params params;
88 struct wpa_ssid *old_ssid;
89 #ifdef CONFIG_IEEE80211R
91 #endif /* CONFIG_IEEE80211R */
92 #ifdef CONFIG_IEEE80211R
94 #endif /* CONFIG_IEEE80211R */
96 struct wpabuf *resp = NULL;
101 wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for "
106 wpa_s->current_bss = bss;
108 os_memset(¶ms, 0, sizeof(params));
109 wpa_s->reassociate = 0;
111 params.freq = bss->freq;
112 params.bssid = bss->bssid;
113 params.ssid = bss->ssid;
114 params.ssid_len = bss->ssid_len;
115 params.p2p = ssid->p2p_group;
117 if (wpa_s->sme.ssid_len != params.ssid_len ||
118 os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
119 wpa_s->sme.prev_bssid_set = 0;
121 wpa_s->sme.freq = params.freq;
122 os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
123 wpa_s->sme.ssid_len = params.ssid_len;
125 params.auth_alg = WPA_AUTH_ALG_OPEN;
126 #ifdef IEEE8021X_EAPOL
127 if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
129 if (ssid->non_leap == 0)
130 params.auth_alg = WPA_AUTH_ALG_LEAP;
132 params.auth_alg |= WPA_AUTH_ALG_LEAP;
135 #endif /* IEEE8021X_EAPOL */
136 wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
138 if (ssid->auth_alg) {
139 params.auth_alg = ssid->auth_alg;
140 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
141 "0x%x", params.auth_alg);
144 if (wpa_key_mgmt_sae(ssid->key_mgmt)) {
146 struct wpa_ie_data ied;
148 rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
150 wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0) {
151 if (wpa_key_mgmt_sae(ied.key_mgmt)) {
152 wpa_dbg(wpa_s, MSG_DEBUG, "Using SAE auth_alg");
153 params.auth_alg = WPA_AUTH_ALG_SAE;
157 #endif /* CONFIG_SAE */
159 for (i = 0; i < NUM_WEP_KEYS; i++) {
160 if (ssid->wep_key_len[i])
161 params.wep_key[i] = ssid->wep_key[i];
162 params.wep_key_len[i] = ssid->wep_key_len[i];
164 params.wep_tx_keyidx = ssid->wep_tx_keyidx;
166 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
167 os_memset(wpa_s->bssid, 0, ETH_ALEN);
168 os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
170 wpas_notify_bssid_changed(wpa_s);
172 if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
173 wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
174 wpa_key_mgmt_wpa(ssid->key_mgmt)) {
175 int try_opportunistic;
176 try_opportunistic = (ssid->proactive_key_caching < 0 ?
178 ssid->proactive_key_caching) &&
179 (ssid->proto & WPA_PROTO_RSN);
180 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
182 try_opportunistic) == 0)
183 eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
184 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
185 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
186 wpa_s->sme.assoc_req_ie,
187 &wpa_s->sme.assoc_req_ie_len)) {
188 wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
189 "key management and encryption suites");
192 } else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
193 wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) {
195 * Both WPA and non-WPA IEEE 802.1X enabled in configuration -
196 * use non-WPA since the scan results did not indicate that the
197 * AP is using WPA or WPA2.
199 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
200 wpa_s->sme.assoc_req_ie_len = 0;
201 } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
202 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
203 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
204 wpa_s->sme.assoc_req_ie,
205 &wpa_s->sme.assoc_req_ie_len)) {
206 wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
207 "key management and encryption suites (no "
212 } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
213 struct wpabuf *wps_ie;
214 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
215 if (wps_ie && wpabuf_len(wps_ie) <=
216 sizeof(wpa_s->sme.assoc_req_ie)) {
217 wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
218 os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
219 wpa_s->sme.assoc_req_ie_len);
221 wpa_s->sme.assoc_req_ie_len = 0;
223 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
224 #endif /* CONFIG_WPS */
226 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
227 wpa_s->sme.assoc_req_ie_len = 0;
230 #ifdef CONFIG_IEEE80211R
231 ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
232 if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
234 wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
236 /* Prepare for the next transition */
237 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
240 if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) {
241 if (wpa_s->sme.assoc_req_ie_len + 5 <
242 sizeof(wpa_s->sme.assoc_req_ie)) {
243 struct rsn_mdie *mdie;
244 u8 *pos = wpa_s->sme.assoc_req_ie +
245 wpa_s->sme.assoc_req_ie_len;
246 *pos++ = WLAN_EID_MOBILITY_DOMAIN;
247 *pos++ = sizeof(*mdie);
248 mdie = (struct rsn_mdie *) pos;
249 os_memcpy(mdie->mobility_domain, md,
250 MOBILITY_DOMAIN_ID_LEN);
251 mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
252 wpa_s->sme.assoc_req_ie_len += 5;
255 if (wpa_s->sme.ft_used &&
256 os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
257 wpa_sm_has_ptk(wpa_s->wpa)) {
258 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT "
260 params.auth_alg = WPA_AUTH_ALG_FT;
261 params.ie = wpa_s->sme.ft_ies;
262 params.ie_len = wpa_s->sme.ft_ies_len;
265 #endif /* CONFIG_IEEE80211R */
267 #ifdef CONFIG_IEEE80211W
268 wpa_s->sme.mfp = ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
269 wpa_s->conf->pmf : ssid->ieee80211w;
270 if (wpa_s->sme.mfp != NO_MGMT_FRAME_PROTECTION) {
271 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
272 struct wpa_ie_data _ie;
273 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
275 (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
276 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
278 wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
281 #endif /* CONFIG_IEEE80211W */
284 if (wpa_s->global->p2p) {
288 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
289 len = sizeof(wpa_s->sme.assoc_req_ie) -
290 wpa_s->sme.assoc_req_ie_len;
291 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
294 wpa_s->sme.assoc_req_ie_len += res;
296 #endif /* CONFIG_P2P */
299 if (wpa_s->conf->hs20) {
301 hs20 = wpabuf_alloc(20);
303 wpas_hs20_add_indication(hs20);
304 os_memcpy(wpa_s->sme.assoc_req_ie +
305 wpa_s->sme.assoc_req_ie_len,
306 wpabuf_head(hs20), wpabuf_len(hs20));
307 wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
311 #endif /* CONFIG_HS20 */
313 ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab);
314 if (ext_capab_len > 0) {
315 u8 *pos = wpa_s->sme.assoc_req_ie;
316 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
318 os_memmove(pos + ext_capab_len, pos,
319 wpa_s->sme.assoc_req_ie_len -
320 (pos - wpa_s->sme.assoc_req_ie));
321 wpa_s->sme.assoc_req_ie_len += ext_capab_len;
322 os_memcpy(pos, ext_capab, ext_capab_len);
326 if (params.auth_alg == WPA_AUTH_ALG_SAE) {
328 resp = sme_auth_build_sae_commit(wpa_s);
330 resp = sme_auth_build_sae_confirm(wpa_s);
333 params.sae_data = wpabuf_head(resp);
334 params.sae_data_len = wpabuf_len(resp);
335 wpa_s->sme.sae_state = start ? SME_SAE_COMMIT : SME_SAE_CONFIRM;
337 #endif /* CONFIG_SAE */
339 wpa_supplicant_cancel_sched_scan(wpa_s);
340 wpa_supplicant_cancel_scan(wpa_s);
342 wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
343 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
344 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
346 wpa_clear_keys(wpa_s, bss->bssid);
347 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
348 old_ssid = wpa_s->current_ssid;
349 wpa_s->current_ssid = ssid;
350 wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
351 wpa_supplicant_initiate_eapol(wpa_s);
352 if (old_ssid != wpa_s->current_ssid)
353 wpas_notify_network_changed(wpa_s);
355 wpa_s->sme.auth_alg = params.auth_alg;
356 if (wpa_drv_authenticate(wpa_s, ¶ms) < 0) {
357 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
359 wpas_connection_failed(wpa_s, bss->bssid);
360 wpa_supplicant_mark_disassoc(wpa_s);
365 eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
369 * Association will be started based on the authentication event from
377 void sme_authenticate(struct wpa_supplicant *wpa_s,
378 struct wpa_bss *bss, struct wpa_ssid *ssid)
380 wpa_s->sme.sae_state = SME_SAE_INIT;
381 wpa_s->sme.sae_send_confirm = 0;
382 sme_send_authentication(wpa_s, bss, ssid, 1);
388 static int sme_sae_process_commit(struct wpa_supplicant *wpa_s, const u8 *data,
391 /* Check Finite Cyclic Group */
394 if (WPA_GET_LE16(data) != 19) {
395 wpa_printf(MSG_DEBUG, "SAE: Unsupported Finite Cyclic Group %u",
406 static int sme_sae_process_confirm(struct wpa_supplicant *wpa_s, const u8 *data,
413 rc = WPA_GET_LE16(data);
414 wpa_printf(MSG_DEBUG, "SAE: peer-send-confirm %u", rc);
421 static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
422 u16 status_code, const u8 *data, size_t len)
424 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
425 "status code %u", auth_transaction, status_code);
426 wpa_hexdump(MSG_DEBUG, "SME: SAE fields", data, len);
428 if (status_code != WLAN_STATUS_SUCCESS)
431 if (auth_transaction == 1) {
432 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
433 if (wpa_s->current_bss == NULL ||
434 wpa_s->current_ssid == NULL)
436 if (wpa_s->sme.sae_state != SME_SAE_COMMIT)
438 if (sme_sae_process_commit(wpa_s, data, len) < 0)
440 sme_send_authentication(wpa_s, wpa_s->current_bss,
441 wpa_s->current_ssid, 0);
443 } else if (auth_transaction == 2) {
444 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
445 if (wpa_s->sme.sae_state != SME_SAE_CONFIRM)
447 if (sme_sae_process_confirm(wpa_s, data, len) < 0)
454 #endif /* CONFIG_SAE */
457 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
459 struct wpa_ssid *ssid = wpa_s->current_ssid;
462 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
463 "when network is not selected");
467 if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
468 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
469 "when not in authenticating state");
473 if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
474 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
475 "unexpected peer " MACSTR,
476 MAC2STR(data->auth.peer));
480 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
481 " auth_type=%d auth_transaction=%d status_code=%d",
482 MAC2STR(data->auth.peer), data->auth.auth_type,
483 data->auth.auth_transaction, data->auth.status_code);
484 wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
485 data->auth.ies, data->auth.ies_len);
487 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
490 if (data->auth.auth_type == WLAN_AUTH_SAE) {
492 res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
493 data->auth.status_code, data->auth.ies,
496 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
497 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
503 #endif /* CONFIG_SAE */
505 if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
506 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
507 "code %d)", data->auth.status_code);
509 if (data->auth.status_code !=
510 WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
511 wpa_s->sme.auth_alg == data->auth.auth_type ||
512 wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
513 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
514 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
518 switch (data->auth.auth_type) {
520 wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
522 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
523 wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
524 wpa_s->current_ssid);
527 case WLAN_AUTH_SHARED_KEY:
528 wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
530 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
531 wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
532 wpa_s->current_ssid);
540 #ifdef CONFIG_IEEE80211R
541 if (data->auth.auth_type == WLAN_AUTH_FT) {
542 union wpa_event_data edata;
543 os_memset(&edata, 0, sizeof(edata));
544 edata.ft_ies.ies = data->auth.ies;
545 edata.ft_ies.ies_len = data->auth.ies_len;
546 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
547 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
549 #endif /* CONFIG_IEEE80211R */
551 sme_associate(wpa_s, ssid->mode, data->auth.peer,
552 data->auth.auth_type);
556 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
557 const u8 *bssid, u16 auth_type)
559 struct wpa_driver_associate_params params;
560 struct ieee802_11_elems elems;
561 #ifdef CONFIG_HT_OVERRIDES
562 struct ieee80211_ht_capabilities htcaps;
563 struct ieee80211_ht_capabilities htcaps_mask;
564 #endif /* CONFIG_HT_OVERRIDES */
566 os_memset(¶ms, 0, sizeof(params));
567 params.bssid = bssid;
568 params.ssid = wpa_s->sme.ssid;
569 params.ssid_len = wpa_s->sme.ssid_len;
570 params.freq = wpa_s->sme.freq;
571 params.bg_scan_period = wpa_s->current_ssid ?
572 wpa_s->current_ssid->bg_scan_period : -1;
573 params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
574 wpa_s->sme.assoc_req_ie : NULL;
575 params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
576 params.pairwise_suite = cipher_suite2driver(wpa_s->pairwise_cipher);
577 params.group_suite = cipher_suite2driver(wpa_s->group_cipher);
578 #ifdef CONFIG_HT_OVERRIDES
579 os_memset(&htcaps, 0, sizeof(htcaps));
580 os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
581 params.htcaps = (u8 *) &htcaps;
582 params.htcaps_mask = (u8 *) &htcaps_mask;
583 wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, ¶ms);
584 #endif /* CONFIG_HT_OVERRIDES */
585 #ifdef CONFIG_IEEE80211R
586 if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
587 params.wpa_ie = wpa_s->sme.ft_ies;
588 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
590 #endif /* CONFIG_IEEE80211R */
592 params.mgmt_frame_protection = wpa_s->sme.mfp;
593 if (wpa_s->sme.prev_bssid_set)
594 params.prev_bssid = wpa_s->sme.prev_bssid;
596 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
597 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
598 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
601 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
603 if (params.wpa_ie == NULL ||
604 ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
606 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
607 os_memset(&elems, 0, sizeof(elems));
610 params.wpa_proto = WPA_PROTO_RSN;
611 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
612 elems.rsn_ie_len + 2);
613 } else if (elems.wpa_ie) {
614 params.wpa_proto = WPA_PROTO_WPA;
615 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
616 elems.wpa_ie_len + 2);
618 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
619 if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
622 if (wpa_s->parent->set_sta_uapsd)
623 params.uapsd = wpa_s->parent->sta_uapsd;
627 if (wpa_drv_associate(wpa_s, ¶ms) < 0) {
628 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
630 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
631 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
632 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
636 eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
641 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
642 const u8 *ies, size_t ies_len)
644 if (md == NULL || ies == NULL) {
645 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
646 os_free(wpa_s->sme.ft_ies);
647 wpa_s->sme.ft_ies = NULL;
648 wpa_s->sme.ft_ies_len = 0;
649 wpa_s->sme.ft_used = 0;
653 os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
654 wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
655 os_free(wpa_s->sme.ft_ies);
656 wpa_s->sme.ft_ies = os_malloc(ies_len);
657 if (wpa_s->sme.ft_ies == NULL)
659 os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
660 wpa_s->sme.ft_ies_len = ies_len;
665 static void sme_deauth(struct wpa_supplicant *wpa_s)
669 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
671 if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
672 WLAN_REASON_DEAUTH_LEAVING) < 0) {
673 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
676 wpa_s->sme.prev_bssid_set = 0;
678 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
679 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
680 os_memset(wpa_s->bssid, 0, ETH_ALEN);
681 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
683 wpas_notify_bssid_changed(wpa_s);
687 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
688 union wpa_event_data *data)
690 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
691 "status code %d", MAC2STR(wpa_s->pending_bssid),
692 data->assoc_reject.status_code);
694 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
697 * For now, unconditionally terminate the previous authentication. In
698 * theory, this should not be needed, but mac80211 gets quite confused
699 * if the authentication is left pending.. Some roaming cases might
700 * benefit from using the previous authentication, so this could be
701 * optimized in the future.
707 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
708 union wpa_event_data *data)
710 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
711 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
712 wpa_supplicant_mark_disassoc(wpa_s);
716 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
717 union wpa_event_data *data)
719 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
720 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
721 wpa_supplicant_mark_disassoc(wpa_s);
725 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
726 union wpa_event_data *data)
728 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
729 if (wpa_s->sme.prev_bssid_set) {
731 * cfg80211/mac80211 can get into somewhat confused state if
732 * the AP only disassociates us and leaves us in authenticated
733 * state. For now, force the state to be cleared to avoid
734 * confusing errors if we try to associate with the AP again.
736 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
738 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
739 WLAN_REASON_DEAUTH_LEAVING);
744 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
746 struct wpa_supplicant *wpa_s = eloop_ctx;
747 if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
748 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
754 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
756 struct wpa_supplicant *wpa_s = eloop_ctx;
757 if (wpa_s->wpa_state == WPA_ASSOCIATING) {
758 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
764 void sme_state_changed(struct wpa_supplicant *wpa_s)
766 /* Make sure timers are cleaned up appropriately. */
767 if (wpa_s->wpa_state != WPA_ASSOCIATING)
768 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
769 if (wpa_s->wpa_state != WPA_AUTHENTICATING)
770 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
774 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
775 const u8 *prev_pending_bssid)
778 * mac80211-workaround to force deauth on failed auth cmd,
779 * requires us to remain in authenticating state to allow the
780 * second authentication attempt to be continued properly.
782 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
783 "to proceed after disconnection event");
784 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
785 os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
788 * Re-arm authentication timer in case auth fails for whatever reason.
790 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
791 eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
796 void sme_deinit(struct wpa_supplicant *wpa_s)
798 os_free(wpa_s->sme.ft_ies);
799 wpa_s->sme.ft_ies = NULL;
800 wpa_s->sme.ft_ies_len = 0;
801 #ifdef CONFIG_IEEE80211W
802 sme_stop_sa_query(wpa_s);
803 #endif /* CONFIG_IEEE80211W */
805 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
806 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
807 eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
811 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
812 const u8 *chan_list, u8 num_channels,
815 struct ieee80211_2040_bss_coex_ie *bc_ie;
816 struct ieee80211_2040_intol_chan_report *ic_report;
819 wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR,
820 MAC2STR(wpa_s->bssid));
822 buf = wpabuf_alloc(2 + /* action.category + action_code */
823 sizeof(struct ieee80211_2040_bss_coex_ie) +
824 sizeof(struct ieee80211_2040_intol_chan_report) +
829 wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
830 wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
832 bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
833 bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
836 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
838 if (num_channels > 0) {
839 ic_report = wpabuf_put(buf, sizeof(*ic_report));
840 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
841 ic_report->length = num_channels + 1;
842 ic_report->op_class = 0;
843 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
847 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
848 wpa_s->own_addr, wpa_s->bssid,
849 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
850 wpa_msg(wpa_s, MSG_INFO,
851 "SME: Failed to send 20/40 BSS Coexistence frame");
859 * enum wpas_band - Frequency band
860 * @WPAS_BAND_2GHZ: 2.4 GHz ISM band
861 * @WPAS_BAND_5GHZ: around 5 GHz band (4.9 - 5.7 GHz)
870 * freq_to_channel - Convert frequency into channel info
871 * @channel: Buffer for returning channel number
872 * Returns: Band (2 or 5 GHz)
874 static enum wpas_band freq_to_channel(int freq, u8 *channel)
876 enum wpas_band band = (freq <= 2484) ? WPAS_BAND_2GHZ : WPAS_BAND_5GHZ;
879 if (freq >= 2412 && freq <= 2472)
880 chan = (freq - 2407) / 5;
881 else if (freq == 2484)
883 else if (freq >= 5180 && freq <= 5805)
884 chan = (freq - 5000) / 5;
891 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
896 u8 chan_list[P2P_MAX_CHANNELS], channel;
897 u8 num_channels = 0, num_intol = 0, i;
899 if (!wpa_s->sme.sched_obss_scan)
902 wpa_s->sme.sched_obss_scan = 0;
903 if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
907 * Check whether AP uses regulatory triplet or channel triplet in
908 * country info. Right now the operating class of the BSS channel
909 * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
910 * based on the assumption that operating class triplet is not used in
911 * beacon frame. If the First Channel Number/Operating Extension
912 * Identifier octet has a positive integer value of 201 or greater,
913 * then its operating class triplet.
915 * TODO: If Supported Operating Classes element is present in beacon
916 * frame, have to lookup operating class in Annex E and fill them in
919 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
920 if (ie && (ie[1] >= 6) && (ie[5] >= 201))
923 os_memset(chan_list, 0, sizeof(chan_list));
925 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
926 /* Skip other band bss */
927 if (freq_to_channel(bss->freq, &channel) != WPAS_BAND_2GHZ)
930 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
931 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
933 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
934 /* Check whether the channel is already considered */
935 for (i = 0; i < num_channels; i++) {
936 if (channel == chan_list[i])
939 if (i != num_channels)
942 if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
945 chan_list[num_channels++] = channel;
949 sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
954 static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
956 enum hostapd_hw_mode mode)
960 for (i = 0; i < num_modes; i++) {
961 if (modes[i].mode == mode)
969 static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s,
970 enum hostapd_hw_mode band,
971 struct wpa_driver_scan_params *params)
973 /* Include only supported channels for the specified band */
974 struct hostapd_hw_modes *mode;
977 mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band);
979 /* No channels supported in this band - use empty list */
980 params->freqs = os_zalloc(sizeof(int));
984 params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
985 if (params->freqs == NULL)
987 for (count = 0, i = 0; i < mode->num_channels; i++) {
988 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
990 params->freqs[count++] = mode->channels[i].freq;
995 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
997 struct wpa_supplicant *wpa_s = eloop_ctx;
998 struct wpa_driver_scan_params params;
1000 if (!wpa_s->current_bss) {
1001 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
1005 os_memset(¶ms, 0, sizeof(params));
1006 wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G, ¶ms);
1007 wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
1009 if (wpa_supplicant_trigger_scan(wpa_s, ¶ms))
1010 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
1012 wpa_s->sme.sched_obss_scan = 1;
1013 os_free(params.freqs);
1015 eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1016 sme_obss_scan_timeout, wpa_s, NULL);
1020 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
1023 struct wpa_bss *bss = wpa_s->current_bss;
1024 struct wpa_ssid *ssid = wpa_s->current_ssid;
1025 struct hostapd_hw_modes *hw_mode = NULL;
1028 eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1029 wpa_s->sme.sched_obss_scan = 0;
1034 * Schedule OBSS scan if driver is using station SME in wpa_supplicant
1035 * or it expects OBSS scan to be performed by wpa_supplicant.
1037 if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
1038 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
1039 ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
1042 if (!wpa_s->hw.modes)
1045 /* only HT caps in 11g mode are relevant */
1046 for (i = 0; i < wpa_s->hw.num_modes; i++) {
1047 hw_mode = &wpa_s->hw.modes[i];
1048 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
1052 /* Driver does not support HT40 for 11g or doesn't have 11g. */
1053 if (i == wpa_s->hw.num_modes || !hw_mode ||
1054 !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1057 if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
1058 return; /* Not associated on 2.4 GHz band */
1060 /* Check whether AP supports HT40 */
1061 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
1062 if (!ie || ie[1] < 2 ||
1063 !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1064 return; /* AP does not support HT40 */
1066 ie = wpa_bss_get_ie(wpa_s->current_bss,
1067 WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
1068 if (!ie || ie[1] < 14)
1069 return; /* AP does not request OBSS scans */
1071 wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
1072 if (wpa_s->sme.obss_scan_int < 10) {
1073 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
1074 "replaced with the minimum 10 sec",
1075 wpa_s->sme.obss_scan_int);
1076 wpa_s->sme.obss_scan_int = 10;
1078 wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
1079 wpa_s->sme.obss_scan_int);
1080 eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1081 sme_obss_scan_timeout, wpa_s, NULL);
1085 #ifdef CONFIG_IEEE80211W
1087 static const unsigned int sa_query_max_timeout = 1000;
1088 static const unsigned int sa_query_retry_timeout = 201;
1090 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
1093 struct os_time now, passed;
1095 os_time_sub(&now, &wpa_s->sme.sa_query_start, &passed);
1096 tu = (passed.sec * 1000000 + passed.usec) / 1024;
1097 if (sa_query_max_timeout < tu) {
1098 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
1099 sme_stop_sa_query(wpa_s);
1100 wpa_supplicant_deauthenticate(
1101 wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
1109 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
1112 u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
1113 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
1114 MACSTR, MAC2STR(wpa_s->bssid));
1115 wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
1116 trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1117 req[0] = WLAN_ACTION_SA_QUERY;
1118 req[1] = WLAN_SA_QUERY_REQUEST;
1119 os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1120 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1121 wpa_s->own_addr, wpa_s->bssid,
1122 req, sizeof(req), 0) < 0)
1123 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
1128 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
1130 struct wpa_supplicant *wpa_s = eloop_ctx;
1131 unsigned int timeout, sec, usec;
1132 u8 *trans_id, *nbuf;
1134 if (wpa_s->sme.sa_query_count > 0 &&
1135 sme_check_sa_query_timeout(wpa_s))
1138 nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
1139 wpa_s->sme.sa_query_count + 1,
1140 WLAN_SA_QUERY_TR_ID_LEN);
1143 if (wpa_s->sme.sa_query_count == 0) {
1144 /* Starting a new SA Query procedure */
1145 os_get_time(&wpa_s->sme.sa_query_start);
1147 trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
1148 wpa_s->sme.sa_query_trans_id = nbuf;
1149 wpa_s->sme.sa_query_count++;
1151 os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1153 timeout = sa_query_retry_timeout;
1154 sec = ((timeout / 1000) * 1024) / 1000;
1155 usec = (timeout % 1000) * 1024;
1156 eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
1158 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
1159 wpa_s->sme.sa_query_count);
1161 sme_send_sa_query_req(wpa_s, trans_id);
1165 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
1167 sme_sa_query_timer(wpa_s, NULL);
1171 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
1173 eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
1174 os_free(wpa_s->sme.sa_query_trans_id);
1175 wpa_s->sme.sa_query_trans_id = NULL;
1176 wpa_s->sme.sa_query_count = 0;
1180 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1181 const u8 *da, u16 reason_code)
1183 struct wpa_ssid *ssid;
1185 if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME))
1187 if (wpa_s->wpa_state != WPA_COMPLETED)
1189 ssid = wpa_s->current_ssid;
1191 (ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
1192 wpa_s->conf->pmf : ssid->ieee80211w) == NO_MGMT_FRAME_PROTECTION)
1194 if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1196 if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1197 reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1199 if (wpa_s->sme.sa_query_count > 0)
1202 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1203 "possible AP/STA state mismatch - trigger SA Query");
1204 sme_start_sa_query(wpa_s);
1208 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1209 const u8 *data, size_t len)
1213 if (wpa_s->sme.sa_query_trans_id == NULL ||
1214 len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1215 data[0] != WLAN_SA_QUERY_RESPONSE)
1217 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1218 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1220 if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1223 for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1224 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1225 i * WLAN_SA_QUERY_TR_ID_LEN,
1226 data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1230 if (i >= wpa_s->sme.sa_query_count) {
1231 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1232 "transaction identifier found");
1236 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1237 "from " MACSTR, MAC2STR(sa));
1238 sme_stop_sa_query(wpa_s);
1241 #endif /* CONFIG_IEEE80211W */