Line data Source code
1 : /*
2 : * wpa_supplicant - SME
3 : * Copyright (c) 2009-2014, Jouni Malinen <j@w1.fi>
4 : *
5 : * This software may be distributed under the terms of the BSD license.
6 : * See README for more details.
7 : */
8 :
9 : #include "includes.h"
10 :
11 : #include "common.h"
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 "common/sae.h"
18 : #include "rsn_supp/wpa.h"
19 : #include "rsn_supp/pmksa_cache.h"
20 : #include "config.h"
21 : #include "wpa_supplicant_i.h"
22 : #include "driver_i.h"
23 : #include "wpas_glue.h"
24 : #include "wps_supplicant.h"
25 : #include "p2p_supplicant.h"
26 : #include "notify.h"
27 : #include "bss.h"
28 : #include "scan.h"
29 : #include "sme.h"
30 : #include "hs20_supplicant.h"
31 :
32 : #define SME_AUTH_TIMEOUT 5
33 : #define SME_ASSOC_TIMEOUT 5
34 :
35 : static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx);
36 : static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx);
37 : static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx);
38 : #ifdef CONFIG_IEEE80211W
39 : static void sme_stop_sa_query(struct wpa_supplicant *wpa_s);
40 : #endif /* CONFIG_IEEE80211W */
41 :
42 :
43 : #ifdef CONFIG_SAE
44 :
45 99 : static int index_within_array(const int *array, int idx)
46 : {
47 : int i;
48 112 : for (i = 0; i < idx; i++) {
49 13 : if (array[i] <= 0)
50 0 : return 0;
51 : }
52 99 : return 1;
53 : }
54 :
55 :
56 99 : static int sme_set_sae_group(struct wpa_supplicant *wpa_s)
57 : {
58 99 : int *groups = wpa_s->conf->sae_groups;
59 99 : int default_groups[] = { 19, 20, 21, 25, 26, 0 };
60 :
61 99 : if (!groups || groups[0] <= 0)
62 32 : groups = default_groups;
63 :
64 : /* Configuration may have changed, so validate current index */
65 99 : if (!index_within_array(groups, wpa_s->sme.sae_group_index))
66 0 : return -1;
67 :
68 : for (;;) {
69 101 : int group = groups[wpa_s->sme.sae_group_index];
70 101 : if (group <= 0)
71 2 : break;
72 99 : if (sae_set_group(&wpa_s->sme.sae, group) == 0) {
73 97 : wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected SAE group %d",
74 : wpa_s->sme.sae.group);
75 97 : return 0;
76 : }
77 2 : wpa_s->sme.sae_group_index++;
78 2 : }
79 :
80 2 : return -1;
81 : }
82 :
83 :
84 99 : static struct wpabuf * sme_auth_build_sae_commit(struct wpa_supplicant *wpa_s,
85 : struct wpa_ssid *ssid,
86 : const u8 *bssid)
87 : {
88 : struct wpabuf *buf;
89 : size_t len;
90 :
91 99 : if (ssid->passphrase == NULL) {
92 4 : wpa_printf(MSG_DEBUG, "SAE: No password available");
93 4 : return NULL;
94 : }
95 :
96 95 : if (sme_set_sae_group(wpa_s) < 0) {
97 1 : wpa_printf(MSG_DEBUG, "SAE: Failed to select group");
98 1 : return NULL;
99 : }
100 :
101 282 : if (sae_prepare_commit(wpa_s->own_addr, bssid,
102 94 : (u8 *) ssid->passphrase,
103 94 : os_strlen(ssid->passphrase),
104 : &wpa_s->sme.sae) < 0) {
105 4 : wpa_printf(MSG_DEBUG, "SAE: Could not pick PWE");
106 4 : return NULL;
107 : }
108 :
109 90 : len = wpa_s->sme.sae_token ? wpabuf_len(wpa_s->sme.sae_token) : 0;
110 90 : buf = wpabuf_alloc(4 + SAE_COMMIT_MAX_LEN + len);
111 90 : if (buf == NULL)
112 0 : return NULL;
113 :
114 90 : wpabuf_put_le16(buf, 1); /* Transaction seq# */
115 90 : wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
116 90 : sae_write_commit(&wpa_s->sme.sae, buf, wpa_s->sme.sae_token);
117 :
118 90 : return buf;
119 : }
120 :
121 :
122 63 : static struct wpabuf * sme_auth_build_sae_confirm(struct wpa_supplicant *wpa_s)
123 : {
124 : struct wpabuf *buf;
125 :
126 63 : buf = wpabuf_alloc(4 + SAE_CONFIRM_MAX_LEN);
127 63 : if (buf == NULL)
128 0 : return NULL;
129 :
130 63 : wpabuf_put_le16(buf, 2); /* Transaction seq# */
131 63 : wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
132 63 : sae_write_confirm(&wpa_s->sme.sae, buf);
133 :
134 63 : return buf;
135 : }
136 :
137 : #endif /* CONFIG_SAE */
138 :
139 :
140 : /**
141 : * sme_auth_handle_rrm - Handle RRM aspects of current authentication attempt
142 : * @wpa_s: Pointer to wpa_supplicant data
143 : * @bss: Pointer to the bss which is the target of authentication attempt
144 : */
145 3105 : static void sme_auth_handle_rrm(struct wpa_supplicant *wpa_s,
146 : struct wpa_bss *bss)
147 : {
148 3105 : const u8 rrm_ie_len = 5;
149 : u8 *pos;
150 : const u8 *rrm_ie;
151 :
152 3105 : wpa_s->rrm.rrm_used = 0;
153 :
154 3105 : wpa_printf(MSG_DEBUG,
155 : "RRM: Determining whether RRM can be used - device support: 0x%x",
156 : wpa_s->drv_rrm_flags);
157 :
158 3105 : rrm_ie = wpa_bss_get_ie(bss, WLAN_EID_RRM_ENABLED_CAPABILITIES);
159 3105 : if (!rrm_ie || !(bss->caps & IEEE80211_CAP_RRM)) {
160 3104 : wpa_printf(MSG_DEBUG, "RRM: No RRM in network");
161 3104 : return;
162 : }
163 :
164 1 : if (!(wpa_s->drv_rrm_flags &
165 1 : WPA_DRIVER_FLAGS_DS_PARAM_SET_IE_IN_PROBES) ||
166 1 : !(wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_QUIET)) {
167 0 : wpa_printf(MSG_DEBUG,
168 : "RRM: Insufficient RRM support in driver - do not use RRM");
169 0 : return;
170 : }
171 :
172 1 : if (sizeof(wpa_s->sme.assoc_req_ie) <
173 1 : wpa_s->sme.assoc_req_ie_len + rrm_ie_len + 2) {
174 0 : wpa_printf(MSG_INFO,
175 : "RRM: Unable to use RRM, no room for RRM IE");
176 0 : return;
177 : }
178 :
179 1 : wpa_printf(MSG_DEBUG, "RRM: Adding RRM IE to Association Request");
180 1 : pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
181 1 : os_memset(pos, 0, 2 + rrm_ie_len);
182 1 : *pos++ = WLAN_EID_RRM_ENABLED_CAPABILITIES;
183 1 : *pos++ = rrm_ie_len;
184 :
185 : /* Set supported capabilites flags */
186 1 : if (wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_TX_POWER_INSERTION)
187 0 : *pos |= WLAN_RRM_CAPS_LINK_MEASUREMENT;
188 :
189 1 : wpa_s->sme.assoc_req_ie_len += rrm_ie_len + 2;
190 1 : wpa_s->rrm.rrm_used = 1;
191 : }
192 :
193 :
194 3111 : static void sme_send_authentication(struct wpa_supplicant *wpa_s,
195 : struct wpa_bss *bss, struct wpa_ssid *ssid,
196 : int start)
197 : {
198 : struct wpa_driver_auth_params params;
199 : struct wpa_ssid *old_ssid;
200 : #ifdef CONFIG_IEEE80211R
201 : const u8 *ie;
202 : #endif /* CONFIG_IEEE80211R */
203 : #ifdef CONFIG_IEEE80211R
204 3111 : const u8 *md = NULL;
205 : #endif /* CONFIG_IEEE80211R */
206 : int i, bssid_changed;
207 3111 : struct wpabuf *resp = NULL;
208 : u8 ext_capab[18];
209 : int ext_capab_len;
210 : int skip_auth;
211 :
212 3111 : if (bss == NULL) {
213 0 : wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for "
214 : "the network");
215 0 : wpas_connect_work_done(wpa_s);
216 0 : return;
217 : }
218 :
219 3114 : skip_auth = wpa_s->conf->reassoc_same_bss_optim &&
220 3 : wpa_s->reassoc_same_bss;
221 3111 : wpa_s->current_bss = bss;
222 :
223 3111 : os_memset(¶ms, 0, sizeof(params));
224 3111 : wpa_s->reassociate = 0;
225 :
226 3111 : params.freq = bss->freq;
227 3111 : params.bssid = bss->bssid;
228 3111 : params.ssid = bss->ssid;
229 3111 : params.ssid_len = bss->ssid_len;
230 3111 : params.p2p = ssid->p2p_group;
231 :
232 5448 : if (wpa_s->sme.ssid_len != params.ssid_len ||
233 2337 : os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
234 907 : wpa_s->sme.prev_bssid_set = 0;
235 :
236 3111 : wpa_s->sme.freq = params.freq;
237 3111 : os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
238 3111 : wpa_s->sme.ssid_len = params.ssid_len;
239 :
240 3111 : params.auth_alg = WPA_AUTH_ALG_OPEN;
241 : #ifdef IEEE8021X_EAPOL
242 3111 : if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
243 16 : if (ssid->leap) {
244 0 : if (ssid->non_leap == 0)
245 0 : params.auth_alg = WPA_AUTH_ALG_LEAP;
246 : else
247 0 : params.auth_alg |= WPA_AUTH_ALG_LEAP;
248 : }
249 : }
250 : #endif /* IEEE8021X_EAPOL */
251 3111 : wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
252 : params.auth_alg);
253 3111 : if (ssid->auth_alg) {
254 304 : params.auth_alg = ssid->auth_alg;
255 304 : wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
256 : "0x%x", params.auth_alg);
257 : }
258 : #ifdef CONFIG_SAE
259 3111 : wpa_s->sme.sae_pmksa_caching = 0;
260 3111 : if (wpa_key_mgmt_sae(ssid->key_mgmt)) {
261 : const u8 *rsn;
262 : struct wpa_ie_data ied;
263 :
264 166 : rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
265 166 : if (!rsn) {
266 0 : wpa_dbg(wpa_s, MSG_DEBUG,
267 : "SAE enabled, but target BSS does not advertise RSN");
268 332 : } else if (wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0 &&
269 166 : wpa_key_mgmt_sae(ied.key_mgmt)) {
270 166 : wpa_dbg(wpa_s, MSG_DEBUG, "Using SAE auth_alg");
271 166 : params.auth_alg = WPA_AUTH_ALG_SAE;
272 : } else {
273 0 : wpa_dbg(wpa_s, MSG_DEBUG,
274 : "SAE enabled, but target BSS does not advertise SAE AKM for RSN");
275 : }
276 : }
277 : #endif /* CONFIG_SAE */
278 :
279 15555 : for (i = 0; i < NUM_WEP_KEYS; i++) {
280 12444 : if (ssid->wep_key_len[i])
281 27 : params.wep_key[i] = ssid->wep_key[i];
282 12444 : params.wep_key_len[i] = ssid->wep_key_len[i];
283 : }
284 3111 : params.wep_tx_keyidx = ssid->wep_tx_keyidx;
285 :
286 3111 : bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
287 3111 : os_memset(wpa_s->bssid, 0, ETH_ALEN);
288 3111 : os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
289 3111 : if (bssid_changed)
290 290 : wpas_notify_bssid_changed(wpa_s);
291 :
292 6130 : if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
293 5693 : wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
294 4905 : wpa_key_mgmt_wpa(ssid->key_mgmt)) {
295 : int try_opportunistic;
296 4474 : try_opportunistic = (ssid->proactive_key_caching < 0 ?
297 2219 : wpa_s->conf->okc :
298 4474 : ssid->proactive_key_caching) &&
299 18 : (ssid->proto & WPA_PROTO_RSN);
300 2237 : if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
301 2237 : wpa_s->current_ssid,
302 : try_opportunistic) == 0)
303 75 : eapol_sm_notify_pmkid_attempt(wpa_s->eapol);
304 2237 : wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
305 4474 : if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
306 2237 : wpa_s->sme.assoc_req_ie,
307 : &wpa_s->sme.assoc_req_ie_len)) {
308 6 : wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
309 : "key management and encryption suites");
310 6 : wpas_connect_work_done(wpa_s);
311 6 : return;
312 : }
313 890 : } else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
314 16 : wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) {
315 : /*
316 : * Both WPA and non-WPA IEEE 802.1X enabled in configuration -
317 : * use non-WPA since the scan results did not indicate that the
318 : * AP is using WPA or WPA2.
319 : */
320 0 : wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
321 0 : wpa_s->sme.assoc_req_ie_len = 0;
322 874 : } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
323 1 : wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
324 2 : if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
325 1 : wpa_s->sme.assoc_req_ie,
326 : &wpa_s->sme.assoc_req_ie_len)) {
327 0 : wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
328 : "key management and encryption suites (no "
329 : "scan results)");
330 0 : wpas_connect_work_done(wpa_s);
331 0 : return;
332 : }
333 : #ifdef CONFIG_WPS
334 873 : } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
335 : struct wpabuf *wps_ie;
336 461 : wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
337 461 : if (wps_ie && wpabuf_len(wps_ie) <=
338 : sizeof(wpa_s->sme.assoc_req_ie)) {
339 460 : wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
340 460 : os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
341 : wpa_s->sme.assoc_req_ie_len);
342 : } else
343 1 : wpa_s->sme.assoc_req_ie_len = 0;
344 461 : wpabuf_free(wps_ie);
345 461 : wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
346 : #endif /* CONFIG_WPS */
347 : } else {
348 412 : wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
349 412 : wpa_s->sme.assoc_req_ie_len = 0;
350 : }
351 :
352 : #ifdef CONFIG_IEEE80211R
353 3105 : ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
354 3105 : if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
355 184 : md = ie + 2;
356 3105 : wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
357 3105 : if (md) {
358 : /* Prepare for the next transition */
359 184 : wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
360 : }
361 :
362 3105 : if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) {
363 176 : if (wpa_s->sme.assoc_req_ie_len + 5 <
364 : sizeof(wpa_s->sme.assoc_req_ie)) {
365 : struct rsn_mdie *mdie;
366 176 : u8 *pos = wpa_s->sme.assoc_req_ie +
367 176 : wpa_s->sme.assoc_req_ie_len;
368 176 : *pos++ = WLAN_EID_MOBILITY_DOMAIN;
369 176 : *pos++ = sizeof(*mdie);
370 176 : mdie = (struct rsn_mdie *) pos;
371 176 : os_memcpy(mdie->mobility_domain, md,
372 : MOBILITY_DOMAIN_ID_LEN);
373 176 : mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
374 176 : wpa_s->sme.assoc_req_ie_len += 5;
375 : }
376 :
377 303 : if (wpa_s->sme.ft_used &&
378 254 : os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
379 127 : wpa_sm_has_ptk(wpa_s->wpa)) {
380 127 : wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT "
381 : "over-the-air");
382 127 : params.auth_alg = WPA_AUTH_ALG_FT;
383 127 : params.ie = wpa_s->sme.ft_ies;
384 127 : params.ie_len = wpa_s->sme.ft_ies_len;
385 : }
386 : }
387 : #endif /* CONFIG_IEEE80211R */
388 :
389 : #ifdef CONFIG_IEEE80211W
390 3105 : wpa_s->sme.mfp = wpas_get_ssid_pmf(wpa_s, ssid);
391 3105 : if (wpa_s->sme.mfp != NO_MGMT_FRAME_PROTECTION) {
392 407 : const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
393 : struct wpa_ie_data _ie;
394 814 : if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
395 407 : _ie.capabilities &
396 : (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
397 57 : wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
398 : "MFP: require MFP");
399 57 : wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
400 : }
401 : }
402 : #endif /* CONFIG_IEEE80211W */
403 :
404 : #ifdef CONFIG_P2P
405 3105 : if (wpa_s->global->p2p) {
406 : u8 *pos;
407 : size_t len;
408 : int res;
409 3105 : pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
410 3105 : len = sizeof(wpa_s->sme.assoc_req_ie) -
411 3105 : wpa_s->sme.assoc_req_ie_len;
412 3105 : res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
413 : ssid->p2p_group);
414 3105 : if (res >= 0)
415 3099 : wpa_s->sme.assoc_req_ie_len += res;
416 : }
417 : #endif /* CONFIG_P2P */
418 :
419 : #ifdef CONFIG_HS20
420 3105 : if (is_hs20_network(wpa_s, ssid, bss)) {
421 : struct wpabuf *hs20;
422 91 : hs20 = wpabuf_alloc(20);
423 91 : if (hs20) {
424 91 : int pps_mo_id = hs20_get_pps_mo_id(wpa_s, ssid);
425 : size_t len;
426 :
427 91 : wpas_hs20_add_indication(hs20, pps_mo_id);
428 91 : len = sizeof(wpa_s->sme.assoc_req_ie) -
429 91 : wpa_s->sme.assoc_req_ie_len;
430 91 : if (wpabuf_len(hs20) <= len) {
431 91 : os_memcpy(wpa_s->sme.assoc_req_ie +
432 : wpa_s->sme.assoc_req_ie_len,
433 : wpabuf_head(hs20), wpabuf_len(hs20));
434 91 : wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
435 : }
436 91 : wpabuf_free(hs20);
437 : }
438 : }
439 : #endif /* CONFIG_HS20 */
440 :
441 : #ifdef CONFIG_FST
442 3105 : if (wpa_s->fst_ies) {
443 10 : int fst_ies_len = wpabuf_len(wpa_s->fst_ies);
444 :
445 10 : if (wpa_s->sme.assoc_req_ie_len + fst_ies_len <=
446 : sizeof(wpa_s->sme.assoc_req_ie)) {
447 10 : os_memcpy(wpa_s->sme.assoc_req_ie +
448 : wpa_s->sme.assoc_req_ie_len,
449 : wpabuf_head(wpa_s->fst_ies),
450 : fst_ies_len);
451 10 : wpa_s->sme.assoc_req_ie_len += fst_ies_len;
452 : }
453 : }
454 : #endif /* CONFIG_FST */
455 :
456 3105 : ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab,
457 : sizeof(ext_capab));
458 3105 : if (ext_capab_len > 0) {
459 3105 : u8 *pos = wpa_s->sme.assoc_req_ie;
460 3105 : if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
461 2186 : pos += 2 + pos[1];
462 3105 : os_memmove(pos + ext_capab_len, pos,
463 : wpa_s->sme.assoc_req_ie_len -
464 : (pos - wpa_s->sme.assoc_req_ie));
465 3105 : wpa_s->sme.assoc_req_ie_len += ext_capab_len;
466 3105 : os_memcpy(pos, ext_capab, ext_capab_len);
467 : }
468 :
469 3105 : if (wpa_s->vendor_elem[VENDOR_ELEM_ASSOC_REQ]) {
470 30 : struct wpabuf *buf = wpa_s->vendor_elem[VENDOR_ELEM_ASSOC_REQ];
471 : size_t len;
472 :
473 30 : len = sizeof(wpa_s->sme.assoc_req_ie) -
474 30 : wpa_s->sme.assoc_req_ie_len;
475 30 : if (wpabuf_len(buf) <= len) {
476 30 : os_memcpy(wpa_s->sme.assoc_req_ie +
477 : wpa_s->sme.assoc_req_ie_len,
478 : wpabuf_head(buf), wpabuf_len(buf));
479 30 : wpa_s->sme.assoc_req_ie_len += wpabuf_len(buf);
480 : }
481 : }
482 :
483 3105 : sme_auth_handle_rrm(wpa_s, bss);
484 :
485 : #ifdef CONFIG_SAE
486 3269 : if (!skip_auth && params.auth_alg == WPA_AUTH_ALG_SAE &&
487 164 : pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid, ssid, 0) == 0)
488 : {
489 2 : wpa_dbg(wpa_s, MSG_DEBUG,
490 : "PMKSA cache entry found - try to use PMKSA caching instead of new SAE authentication");
491 2 : params.auth_alg = WPA_AUTH_ALG_OPEN;
492 2 : wpa_s->sme.sae_pmksa_caching = 1;
493 : }
494 :
495 3105 : if (!skip_auth && params.auth_alg == WPA_AUTH_ALG_SAE) {
496 162 : if (start)
497 99 : resp = sme_auth_build_sae_commit(wpa_s, ssid,
498 99 : bss->bssid);
499 : else
500 63 : resp = sme_auth_build_sae_confirm(wpa_s);
501 162 : if (resp == NULL) {
502 9 : wpas_connection_failed(wpa_s, bss->bssid);
503 9 : return;
504 : }
505 153 : params.sae_data = wpabuf_head(resp);
506 153 : params.sae_data_len = wpabuf_len(resp);
507 153 : wpa_s->sme.sae.state = start ? SAE_COMMITTED : SAE_CONFIRMED;
508 : }
509 : #endif /* CONFIG_SAE */
510 :
511 3096 : wpa_supplicant_cancel_sched_scan(wpa_s);
512 3096 : wpa_supplicant_cancel_scan(wpa_s);
513 :
514 21672 : wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
515 18576 : " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
516 : wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
517 :
518 3096 : wpa_clear_keys(wpa_s, bss->bssid);
519 3096 : wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
520 3096 : old_ssid = wpa_s->current_ssid;
521 3096 : wpa_s->current_ssid = ssid;
522 3096 : wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
523 3096 : wpa_supplicant_initiate_eapol(wpa_s);
524 3096 : if (old_ssid != wpa_s->current_ssid)
525 1005 : wpas_notify_network_changed(wpa_s);
526 :
527 : #ifdef CONFIG_P2P
528 : /*
529 : * If multi-channel concurrency is not supported, check for any
530 : * frequency conflict. In case of any frequency conflict, remove the
531 : * least prioritized connection.
532 : */
533 3096 : if (wpa_s->num_multichan_concurrent < 2) {
534 : int freq, num;
535 3087 : num = get_shared_radio_freqs(wpa_s, &freq, 1);
536 3087 : if (num > 0 && freq > 0 && freq != params.freq) {
537 1 : wpa_printf(MSG_DEBUG,
538 : "Conflicting frequency found (%d != %d)",
539 : freq, params.freq);
540 1 : if (wpas_p2p_handle_frequency_conflicts(wpa_s,
541 : params.freq,
542 : ssid) < 0) {
543 0 : wpas_connection_failed(wpa_s, bss->bssid);
544 0 : wpa_supplicant_mark_disassoc(wpa_s);
545 0 : wpabuf_free(resp);
546 0 : wpas_connect_work_done(wpa_s);
547 0 : return;
548 : }
549 : }
550 : }
551 : #endif /* CONFIG_P2P */
552 :
553 3096 : if (skip_auth) {
554 2 : wpa_msg(wpa_s, MSG_DEBUG,
555 : "SME: Skip authentication step on reassoc-to-same-BSS");
556 2 : wpabuf_free(resp);
557 2 : sme_associate(wpa_s, ssid->mode, bss->bssid, WLAN_AUTH_OPEN);
558 2 : return;
559 : }
560 :
561 :
562 3094 : wpa_s->sme.auth_alg = params.auth_alg;
563 3094 : if (wpa_drv_authenticate(wpa_s, ¶ms) < 0) {
564 0 : wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
565 : "driver failed");
566 0 : wpas_connection_failed(wpa_s, bss->bssid);
567 0 : wpa_supplicant_mark_disassoc(wpa_s);
568 0 : wpabuf_free(resp);
569 0 : wpas_connect_work_done(wpa_s);
570 0 : return;
571 : }
572 :
573 3094 : eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
574 : NULL);
575 :
576 : /*
577 : * Association will be started based on the authentication event from
578 : * the driver.
579 : */
580 :
581 3094 : wpabuf_free(resp);
582 : }
583 :
584 :
585 3043 : static void sme_auth_start_cb(struct wpa_radio_work *work, int deinit)
586 : {
587 3043 : struct wpa_connect_work *cwork = work->ctx;
588 3043 : struct wpa_supplicant *wpa_s = work->wpa_s;
589 :
590 3043 : if (deinit) {
591 1 : if (work->started)
592 0 : wpa_s->connect_work = NULL;
593 :
594 1 : wpas_connect_work_free(cwork);
595 1 : return;
596 : }
597 :
598 3042 : wpa_s->connect_work = work;
599 :
600 6083 : if (cwork->bss_removed ||
601 6082 : !wpas_valid_bss_ssid(wpa_s, cwork->bss, cwork->ssid) ||
602 3041 : wpas_network_disabled(wpa_s, cwork->ssid)) {
603 2 : wpa_dbg(wpa_s, MSG_DEBUG, "SME: BSS/SSID entry for authentication not valid anymore - drop connection attempt");
604 2 : wpas_connect_work_done(wpa_s);
605 2 : return;
606 : }
607 :
608 3040 : sme_send_authentication(wpa_s, cwork->bss, cwork->ssid, 1);
609 : }
610 :
611 :
612 3045 : void sme_authenticate(struct wpa_supplicant *wpa_s,
613 : struct wpa_bss *bss, struct wpa_ssid *ssid)
614 : {
615 : struct wpa_connect_work *cwork;
616 :
617 3045 : if (bss == NULL || ssid == NULL)
618 2 : return;
619 3043 : if (wpa_s->connect_work) {
620 0 : wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reject sme_authenticate() call since connect_work exist");
621 0 : return;
622 : }
623 :
624 3043 : if (radio_work_pending(wpa_s, "sme-connect")) {
625 : /*
626 : * The previous sme-connect work might no longer be valid due to
627 : * the fact that the BSS list was updated. In addition, it makes
628 : * sense to adhere to the 'newer' decision.
629 : */
630 0 : wpa_dbg(wpa_s, MSG_DEBUG,
631 : "SME: Remove previous pending sme-connect");
632 0 : radio_remove_works(wpa_s, "sme-connect", 0);
633 : }
634 :
635 3043 : cwork = os_zalloc(sizeof(*cwork));
636 3043 : if (cwork == NULL)
637 0 : return;
638 3043 : cwork->bss = bss;
639 3043 : cwork->ssid = ssid;
640 3043 : cwork->sme = 1;
641 :
642 : #ifdef CONFIG_SAE
643 3043 : wpa_s->sme.sae.state = SAE_NOTHING;
644 3043 : wpa_s->sme.sae.send_confirm = 0;
645 3043 : wpa_s->sme.sae_group_index = 0;
646 : #endif /* CONFIG_SAE */
647 :
648 3043 : if (radio_add_work(wpa_s, bss->freq, "sme-connect", 1,
649 : sme_auth_start_cb, cwork) < 0)
650 0 : wpas_connect_work_free(cwork);
651 : }
652 :
653 :
654 : #ifdef CONFIG_SAE
655 :
656 151 : static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
657 : u16 status_code, const u8 *data, size_t len)
658 : {
659 : int *groups;
660 :
661 151 : wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
662 : "status code %u", auth_transaction, status_code);
663 :
664 151 : if (auth_transaction == 1 &&
665 6 : status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
666 12 : wpa_s->sme.sae.state == SAE_COMMITTED &&
667 12 : wpa_s->current_bss && wpa_s->current_ssid) {
668 6 : int default_groups[] = { 19, 20, 21, 25, 26, 0 };
669 : u16 group;
670 :
671 6 : groups = wpa_s->conf->sae_groups;
672 6 : if (!groups || groups[0] <= 0)
673 6 : groups = default_groups;
674 :
675 6 : if (len < sizeof(le16)) {
676 0 : wpa_dbg(wpa_s, MSG_DEBUG,
677 : "SME: Too short SAE anti-clogging token request");
678 0 : return -1;
679 : }
680 6 : group = WPA_GET_LE16(data);
681 6 : wpa_dbg(wpa_s, MSG_DEBUG,
682 : "SME: SAE anti-clogging token requested (group %u)",
683 : group);
684 6 : if (sae_group_allowed(&wpa_s->sme.sae, groups, group) !=
685 : WLAN_STATUS_SUCCESS) {
686 1 : wpa_dbg(wpa_s, MSG_ERROR,
687 : "SME: SAE group %u of anti-clogging request is invalid",
688 : group);
689 1 : return -1;
690 : }
691 5 : wpabuf_free(wpa_s->sme.sae_token);
692 5 : wpa_s->sme.sae_token = wpabuf_alloc_copy(data + sizeof(le16),
693 : len - sizeof(le16));
694 5 : sme_send_authentication(wpa_s, wpa_s->current_bss,
695 : wpa_s->current_ssid, 1);
696 5 : return 0;
697 : }
698 :
699 145 : if (auth_transaction == 1 &&
700 4 : status_code == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED &&
701 8 : wpa_s->sme.sae.state == SAE_COMMITTED &&
702 8 : wpa_s->current_bss && wpa_s->current_ssid) {
703 4 : wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE group not supported");
704 4 : wpa_s->sme.sae_group_index++;
705 4 : if (sme_set_sae_group(wpa_s) < 0)
706 1 : return -1; /* no other groups enabled */
707 3 : wpa_dbg(wpa_s, MSG_DEBUG, "SME: Try next enabled SAE group");
708 3 : sme_send_authentication(wpa_s, wpa_s->current_bss,
709 : wpa_s->current_ssid, 1);
710 3 : return 0;
711 : }
712 :
713 141 : if (status_code != WLAN_STATUS_SUCCESS)
714 0 : return -1;
715 :
716 141 : if (auth_transaction == 1) {
717 : u16 res;
718 :
719 78 : groups = wpa_s->conf->sae_groups;
720 :
721 78 : wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
722 156 : if (wpa_s->current_bss == NULL ||
723 78 : wpa_s->current_ssid == NULL)
724 0 : return -1;
725 78 : if (wpa_s->sme.sae.state != SAE_COMMITTED)
726 0 : return -1;
727 78 : if (groups && groups[0] <= 0)
728 18 : groups = NULL;
729 78 : res = sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL,
730 : groups);
731 78 : if (res == SAE_SILENTLY_DISCARD) {
732 2 : wpa_printf(MSG_DEBUG,
733 : "SAE: Drop commit message due to reflection attack");
734 2 : return 0;
735 : }
736 76 : if (res != WLAN_STATUS_SUCCESS)
737 13 : return -1;
738 :
739 63 : if (sae_process_commit(&wpa_s->sme.sae) < 0) {
740 0 : wpa_printf(MSG_DEBUG, "SAE: Failed to process peer "
741 : "commit");
742 0 : return -1;
743 : }
744 :
745 63 : wpabuf_free(wpa_s->sme.sae_token);
746 63 : wpa_s->sme.sae_token = NULL;
747 63 : sme_send_authentication(wpa_s, wpa_s->current_bss,
748 : wpa_s->current_ssid, 0);
749 63 : return 0;
750 63 : } else if (auth_transaction == 2) {
751 63 : wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
752 63 : if (wpa_s->sme.sae.state != SAE_CONFIRMED)
753 0 : return -1;
754 63 : if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0)
755 3 : return -1;
756 60 : wpa_s->sme.sae.state = SAE_ACCEPTED;
757 60 : sae_clear_temp_data(&wpa_s->sme.sae);
758 60 : return 1;
759 : }
760 :
761 0 : return -1;
762 : }
763 : #endif /* CONFIG_SAE */
764 :
765 :
766 3083 : void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
767 : {
768 3083 : struct wpa_ssid *ssid = wpa_s->current_ssid;
769 :
770 3083 : if (ssid == NULL) {
771 6 : wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
772 : "when network is not selected");
773 6 : return;
774 : }
775 :
776 3077 : if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
777 0 : wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
778 : "when not in authenticating state");
779 0 : return;
780 : }
781 :
782 3077 : if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
783 0 : wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
784 : "unexpected peer " MACSTR,
785 : MAC2STR(data->auth.peer));
786 0 : return;
787 : }
788 :
789 3077 : wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
790 : " auth_type=%d auth_transaction=%d status_code=%d",
791 : MAC2STR(data->auth.peer), data->auth.auth_type,
792 : data->auth.auth_transaction, data->auth.status_code);
793 6154 : wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
794 3077 : data->auth.ies, data->auth.ies_len);
795 :
796 3077 : eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
797 :
798 : #ifdef CONFIG_SAE
799 3077 : if (data->auth.auth_type == WLAN_AUTH_SAE) {
800 : int res;
801 302 : res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
802 151 : data->auth.status_code, data->auth.ies,
803 : data->auth.ies_len);
804 151 : if (res < 0) {
805 18 : wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
806 18 : wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
807 :
808 : }
809 151 : if (res != 1)
810 91 : return;
811 :
812 60 : wpa_printf(MSG_DEBUG, "SME: SAE completed - setting PMK for "
813 : "4-way handshake");
814 60 : wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN,
815 60 : wpa_s->pending_bssid);
816 : }
817 : #endif /* CONFIG_SAE */
818 :
819 2986 : if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
820 31 : char *ie_txt = NULL;
821 :
822 31 : if (data->auth.ies && data->auth.ies_len) {
823 3 : size_t buflen = 2 * data->auth.ies_len + 1;
824 3 : ie_txt = os_malloc(buflen);
825 3 : if (ie_txt) {
826 3 : wpa_snprintf_hex(ie_txt, buflen, data->auth.ies,
827 : data->auth.ies_len);
828 : }
829 : }
830 279 : wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_AUTH_REJECT MACSTR
831 : " auth_type=%u auth_transaction=%u status_code=%u ie=%s",
832 217 : MAC2STR(data->auth.peer), data->auth.auth_type,
833 62 : data->auth.auth_transaction, data->auth.status_code,
834 : ie_txt);
835 31 : os_free(ie_txt);
836 :
837 31 : if (data->auth.status_code !=
838 5 : WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
839 10 : wpa_s->sme.auth_alg == data->auth.auth_type ||
840 5 : wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
841 29 : wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
842 29 : wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
843 29 : return;
844 : }
845 :
846 2 : wpas_connect_work_done(wpa_s);
847 :
848 2 : switch (data->auth.auth_type) {
849 : case WLAN_AUTH_OPEN:
850 1 : wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
851 :
852 1 : wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
853 1 : wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
854 : wpa_s->current_ssid);
855 1 : return;
856 :
857 : case WLAN_AUTH_SHARED_KEY:
858 1 : wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
859 :
860 1 : wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
861 1 : wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
862 : wpa_s->current_ssid);
863 1 : return;
864 :
865 : default:
866 0 : return;
867 : }
868 : }
869 :
870 : #ifdef CONFIG_IEEE80211R
871 2955 : if (data->auth.auth_type == WLAN_AUTH_FT) {
872 126 : if (wpa_ft_process_response(wpa_s->wpa, data->auth.ies,
873 : data->auth.ies_len, 0,
874 126 : data->auth.peer, NULL, 0) < 0) {
875 8 : wpa_dbg(wpa_s, MSG_DEBUG,
876 : "SME: FT Authentication response processing failed");
877 48 : wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "bssid="
878 : MACSTR
879 : " reason=%d locally_generated=1",
880 48 : MAC2STR(wpa_s->pending_bssid),
881 : WLAN_REASON_DEAUTH_LEAVING);
882 8 : wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
883 8 : wpa_supplicant_mark_disassoc(wpa_s);
884 8 : return;
885 : }
886 : }
887 : #endif /* CONFIG_IEEE80211R */
888 :
889 2947 : sme_associate(wpa_s, ssid->mode, data->auth.peer,
890 2947 : data->auth.auth_type);
891 : }
892 :
893 :
894 3057 : void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
895 : const u8 *bssid, u16 auth_type)
896 : {
897 : struct wpa_driver_associate_params params;
898 : struct ieee802_11_elems elems;
899 : #ifdef CONFIG_HT_OVERRIDES
900 : struct ieee80211_ht_capabilities htcaps;
901 : struct ieee80211_ht_capabilities htcaps_mask;
902 : #endif /* CONFIG_HT_OVERRIDES */
903 : #ifdef CONFIG_VHT_OVERRIDES
904 : struct ieee80211_vht_capabilities vhtcaps;
905 : struct ieee80211_vht_capabilities vhtcaps_mask;
906 : #endif /* CONFIG_VHT_OVERRIDES */
907 :
908 3057 : os_memset(¶ms, 0, sizeof(params));
909 3057 : params.bssid = bssid;
910 3057 : params.ssid = wpa_s->sme.ssid;
911 3057 : params.ssid_len = wpa_s->sme.ssid_len;
912 3057 : params.freq.freq = wpa_s->sme.freq;
913 6114 : params.bg_scan_period = wpa_s->current_ssid ?
914 3057 : wpa_s->current_ssid->bg_scan_period : -1;
915 6114 : params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
916 3057 : wpa_s->sme.assoc_req_ie : NULL;
917 3057 : params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
918 3057 : params.pairwise_suite = wpa_s->pairwise_cipher;
919 3057 : params.group_suite = wpa_s->group_cipher;
920 3057 : params.key_mgmt_suite = wpa_s->key_mgmt;
921 3057 : params.wpa_proto = wpa_s->wpa_proto;
922 : #ifdef CONFIG_HT_OVERRIDES
923 3057 : os_memset(&htcaps, 0, sizeof(htcaps));
924 3057 : os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
925 3057 : params.htcaps = (u8 *) &htcaps;
926 3057 : params.htcaps_mask = (u8 *) &htcaps_mask;
927 3057 : wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, ¶ms);
928 : #endif /* CONFIG_HT_OVERRIDES */
929 : #ifdef CONFIG_VHT_OVERRIDES
930 3057 : os_memset(&vhtcaps, 0, sizeof(vhtcaps));
931 3057 : os_memset(&vhtcaps_mask, 0, sizeof(vhtcaps_mask));
932 3057 : params.vhtcaps = &vhtcaps;
933 3057 : params.vhtcaps_mask = &vhtcaps_mask;
934 3057 : wpa_supplicant_apply_vht_overrides(wpa_s, wpa_s->current_ssid, ¶ms);
935 : #endif /* CONFIG_VHT_OVERRIDES */
936 : #ifdef CONFIG_IEEE80211R
937 3057 : if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
938 226 : params.wpa_ie = wpa_s->sme.ft_ies;
939 226 : params.wpa_ie_len = wpa_s->sme.ft_ies_len;
940 : }
941 : #endif /* CONFIG_IEEE80211R */
942 3057 : params.mode = mode;
943 3057 : params.mgmt_frame_protection = wpa_s->sme.mfp;
944 3057 : params.rrm_used = wpa_s->rrm.rrm_used;
945 3057 : if (wpa_s->sme.prev_bssid_set)
946 309 : params.prev_bssid = wpa_s->sme.prev_bssid;
947 :
948 27513 : wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
949 18342 : " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
950 6114 : params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
951 : params.freq.freq);
952 :
953 3057 : wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
954 :
955 6114 : if (params.wpa_ie == NULL ||
956 3057 : ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
957 : < 0) {
958 0 : wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
959 0 : os_memset(&elems, 0, sizeof(elems));
960 : }
961 3057 : if (elems.rsn_ie) {
962 2164 : params.wpa_proto = WPA_PROTO_RSN;
963 2164 : wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
964 2164 : elems.rsn_ie_len + 2);
965 893 : } else if (elems.wpa_ie) {
966 43 : params.wpa_proto = WPA_PROTO_WPA;
967 43 : wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
968 43 : elems.wpa_ie_len + 2);
969 850 : } else if (elems.osen) {
970 1 : params.wpa_proto = WPA_PROTO_OSEN;
971 1 : wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.osen - 2,
972 1 : elems.osen_len + 2);
973 : } else
974 849 : wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
975 3057 : if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
976 390 : params.p2p = 1;
977 :
978 3057 : if (wpa_s->parent->set_sta_uapsd)
979 0 : params.uapsd = wpa_s->parent->sta_uapsd;
980 : else
981 3057 : params.uapsd = -1;
982 :
983 3057 : if (wpa_drv_associate(wpa_s, ¶ms) < 0) {
984 0 : wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
985 : "driver failed");
986 0 : wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
987 0 : wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
988 0 : os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
989 3057 : return;
990 : }
991 :
992 3057 : eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
993 : NULL);
994 : }
995 :
996 :
997 935 : int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
998 : const u8 *ies, size_t ies_len)
999 : {
1000 935 : if (md == NULL || ies == NULL) {
1001 46 : wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
1002 46 : os_free(wpa_s->sme.ft_ies);
1003 46 : wpa_s->sme.ft_ies = NULL;
1004 46 : wpa_s->sme.ft_ies_len = 0;
1005 46 : wpa_s->sme.ft_used = 0;
1006 46 : return 0;
1007 : }
1008 :
1009 889 : os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
1010 889 : wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
1011 889 : os_free(wpa_s->sme.ft_ies);
1012 889 : wpa_s->sme.ft_ies = os_malloc(ies_len);
1013 889 : if (wpa_s->sme.ft_ies == NULL)
1014 0 : return -1;
1015 889 : os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
1016 889 : wpa_s->sme.ft_ies_len = ies_len;
1017 889 : return 0;
1018 : }
1019 :
1020 :
1021 33 : static void sme_deauth(struct wpa_supplicant *wpa_s)
1022 : {
1023 : int bssid_changed;
1024 :
1025 33 : bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
1026 :
1027 33 : if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
1028 : WLAN_REASON_DEAUTH_LEAVING) < 0) {
1029 33 : wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
1030 : "failed");
1031 : }
1032 33 : wpa_s->sme.prev_bssid_set = 0;
1033 :
1034 33 : wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1035 33 : wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
1036 33 : os_memset(wpa_s->bssid, 0, ETH_ALEN);
1037 33 : os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1038 33 : if (bssid_changed)
1039 0 : wpas_notify_bssid_changed(wpa_s);
1040 33 : }
1041 :
1042 :
1043 34 : void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
1044 : union wpa_event_data *data)
1045 : {
1046 34 : wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
1047 : "status code %d", MAC2STR(wpa_s->pending_bssid),
1048 : data->assoc_reject.status_code);
1049 :
1050 34 : eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1051 :
1052 : #ifdef CONFIG_SAE
1053 35 : if (wpa_s->sme.sae_pmksa_caching && wpa_s->current_ssid &&
1054 1 : wpa_key_mgmt_sae(wpa_s->current_ssid->key_mgmt)) {
1055 1 : wpa_dbg(wpa_s, MSG_DEBUG,
1056 : "PMKSA caching attempt rejected - drop PMKSA cache entry and fall back to SAE authentication");
1057 1 : wpa_sm_aborted_cached(wpa_s->wpa);
1058 1 : wpa_sm_pmksa_cache_flush(wpa_s->wpa, wpa_s->current_ssid);
1059 1 : if (wpa_s->current_bss) {
1060 1 : struct wpa_bss *bss = wpa_s->current_bss;
1061 1 : struct wpa_ssid *ssid = wpa_s->current_ssid;
1062 :
1063 1 : wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
1064 : WLAN_REASON_DEAUTH_LEAVING);
1065 1 : wpas_connect_work_done(wpa_s);
1066 1 : wpa_supplicant_mark_disassoc(wpa_s);
1067 1 : wpa_supplicant_connect(wpa_s, bss, ssid);
1068 35 : return;
1069 : }
1070 : }
1071 : #endif /* CONFIG_SAE */
1072 :
1073 : /*
1074 : * For now, unconditionally terminate the previous authentication. In
1075 : * theory, this should not be needed, but mac80211 gets quite confused
1076 : * if the authentication is left pending.. Some roaming cases might
1077 : * benefit from using the previous authentication, so this could be
1078 : * optimized in the future.
1079 : */
1080 33 : sme_deauth(wpa_s);
1081 : }
1082 :
1083 :
1084 13 : void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
1085 : union wpa_event_data *data)
1086 : {
1087 13 : wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
1088 13 : wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1089 13 : wpa_supplicant_mark_disassoc(wpa_s);
1090 13 : }
1091 :
1092 :
1093 1 : void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
1094 : union wpa_event_data *data)
1095 : {
1096 1 : wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
1097 1 : wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1098 1 : wpa_supplicant_mark_disassoc(wpa_s);
1099 1 : }
1100 :
1101 :
1102 5 : void sme_event_disassoc(struct wpa_supplicant *wpa_s,
1103 : struct disassoc_info *info)
1104 : {
1105 5 : wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
1106 5 : if (wpa_s->sme.prev_bssid_set) {
1107 : /*
1108 : * cfg80211/mac80211 can get into somewhat confused state if
1109 : * the AP only disassociates us and leaves us in authenticated
1110 : * state. For now, force the state to be cleared to avoid
1111 : * confusing errors if we try to associate with the AP again.
1112 : */
1113 5 : wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
1114 : "driver state");
1115 5 : wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
1116 : WLAN_REASON_DEAUTH_LEAVING);
1117 : }
1118 5 : }
1119 :
1120 :
1121 0 : static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
1122 : {
1123 0 : struct wpa_supplicant *wpa_s = eloop_ctx;
1124 0 : if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
1125 0 : wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
1126 0 : sme_deauth(wpa_s);
1127 : }
1128 0 : }
1129 :
1130 :
1131 0 : static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
1132 : {
1133 0 : struct wpa_supplicant *wpa_s = eloop_ctx;
1134 0 : if (wpa_s->wpa_state == WPA_ASSOCIATING) {
1135 0 : wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
1136 0 : sme_deauth(wpa_s);
1137 : }
1138 0 : }
1139 :
1140 :
1141 24339 : void sme_state_changed(struct wpa_supplicant *wpa_s)
1142 : {
1143 : /* Make sure timers are cleaned up appropriately. */
1144 24339 : if (wpa_s->wpa_state != WPA_ASSOCIATING)
1145 20974 : eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1146 24339 : if (wpa_s->wpa_state != WPA_AUTHENTICATING)
1147 21298 : eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1148 24339 : }
1149 :
1150 :
1151 7 : void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
1152 : const u8 *prev_pending_bssid)
1153 : {
1154 : /*
1155 : * mac80211-workaround to force deauth on failed auth cmd,
1156 : * requires us to remain in authenticating state to allow the
1157 : * second authentication attempt to be continued properly.
1158 : */
1159 7 : wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
1160 : "to proceed after disconnection event");
1161 7 : wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
1162 7 : os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
1163 :
1164 : /*
1165 : * Re-arm authentication timer in case auth fails for whatever reason.
1166 : */
1167 7 : eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1168 7 : eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
1169 : NULL);
1170 7 : }
1171 :
1172 :
1173 7651 : void sme_clear_on_disassoc(struct wpa_supplicant *wpa_s)
1174 : {
1175 7651 : wpa_s->sme.prev_bssid_set = 0;
1176 : #ifdef CONFIG_SAE
1177 7651 : wpabuf_free(wpa_s->sme.sae_token);
1178 7651 : wpa_s->sme.sae_token = NULL;
1179 7651 : sae_clear_data(&wpa_s->sme.sae);
1180 : #endif /* CONFIG_SAE */
1181 : #ifdef CONFIG_IEEE80211R
1182 7651 : if (wpa_s->sme.ft_ies)
1183 46 : sme_update_ft_ies(wpa_s, NULL, NULL, 0);
1184 : #endif /* CONFIG_IEEE80211R */
1185 7651 : }
1186 :
1187 :
1188 612 : void sme_deinit(struct wpa_supplicant *wpa_s)
1189 : {
1190 612 : os_free(wpa_s->sme.ft_ies);
1191 612 : wpa_s->sme.ft_ies = NULL;
1192 612 : wpa_s->sme.ft_ies_len = 0;
1193 : #ifdef CONFIG_IEEE80211W
1194 612 : sme_stop_sa_query(wpa_s);
1195 : #endif /* CONFIG_IEEE80211W */
1196 612 : sme_clear_on_disassoc(wpa_s);
1197 :
1198 612 : eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1199 612 : eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1200 612 : eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1201 612 : }
1202 :
1203 :
1204 4 : static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
1205 : const u8 *chan_list, u8 num_channels,
1206 : u8 num_intol)
1207 : {
1208 : struct ieee80211_2040_bss_coex_ie *bc_ie;
1209 : struct ieee80211_2040_intol_chan_report *ic_report;
1210 : struct wpabuf *buf;
1211 :
1212 28 : wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR
1213 : " (num_channels=%u num_intol=%u)",
1214 24 : MAC2STR(wpa_s->bssid), num_channels, num_intol);
1215 4 : wpa_hexdump(MSG_DEBUG, "SME: 20/40 BSS Intolerant Channels",
1216 : chan_list, num_channels);
1217 :
1218 4 : buf = wpabuf_alloc(2 + /* action.category + action_code */
1219 : sizeof(struct ieee80211_2040_bss_coex_ie) +
1220 : sizeof(struct ieee80211_2040_intol_chan_report) +
1221 : num_channels);
1222 4 : if (buf == NULL)
1223 4 : return;
1224 :
1225 4 : wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
1226 4 : wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
1227 :
1228 4 : bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
1229 4 : bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
1230 4 : bc_ie->length = 1;
1231 4 : if (num_intol)
1232 2 : bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
1233 :
1234 4 : if (num_channels > 0) {
1235 3 : ic_report = wpabuf_put(buf, sizeof(*ic_report));
1236 3 : ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
1237 3 : ic_report->length = num_channels + 1;
1238 3 : ic_report->op_class = 0;
1239 3 : os_memcpy(wpabuf_put(buf, num_channels), chan_list,
1240 : num_channels);
1241 : }
1242 :
1243 8 : if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1244 4 : wpa_s->own_addr, wpa_s->bssid,
1245 4 : wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
1246 0 : wpa_msg(wpa_s, MSG_INFO,
1247 : "SME: Failed to send 20/40 BSS Coexistence frame");
1248 : }
1249 :
1250 4 : wpabuf_free(buf);
1251 : }
1252 :
1253 :
1254 2436 : int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
1255 : {
1256 : struct wpa_bss *bss;
1257 : const u8 *ie;
1258 : u16 ht_cap;
1259 : u8 chan_list[P2P_MAX_CHANNELS], channel;
1260 2436 : u8 num_channels = 0, num_intol = 0, i;
1261 :
1262 2436 : if (!wpa_s->sme.sched_obss_scan)
1263 2432 : return 0;
1264 :
1265 4 : wpa_s->sme.sched_obss_scan = 0;
1266 4 : if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
1267 0 : return 1;
1268 :
1269 : /*
1270 : * Check whether AP uses regulatory triplet or channel triplet in
1271 : * country info. Right now the operating class of the BSS channel
1272 : * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
1273 : * based on the assumption that operating class triplet is not used in
1274 : * beacon frame. If the First Channel Number/Operating Extension
1275 : * Identifier octet has a positive integer value of 201 or greater,
1276 : * then its operating class triplet.
1277 : *
1278 : * TODO: If Supported Operating Classes element is present in beacon
1279 : * frame, have to lookup operating class in Annex E and fill them in
1280 : * 2040 coex frame.
1281 : */
1282 4 : ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
1283 4 : if (ie && (ie[1] >= 6) && (ie[5] >= 201))
1284 0 : return 1;
1285 :
1286 4 : os_memset(chan_list, 0, sizeof(chan_list));
1287 :
1288 11 : dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1289 : /* Skip other band bss */
1290 : enum hostapd_hw_mode mode;
1291 7 : mode = ieee80211_freq_to_chan(bss->freq, &channel);
1292 7 : if (mode != HOSTAPD_MODE_IEEE80211G &&
1293 : mode != HOSTAPD_MODE_IEEE80211B)
1294 0 : continue;
1295 :
1296 7 : ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
1297 7 : ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
1298 49 : wpa_printf(MSG_DEBUG, "SME OBSS scan BSS " MACSTR
1299 : " freq=%u chan=%u ht_cap=0x%x",
1300 42 : MAC2STR(bss->bssid), bss->freq, channel, ht_cap);
1301 :
1302 7 : if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
1303 3 : if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
1304 2 : num_intol++;
1305 :
1306 : /* Check whether the channel is already considered */
1307 3 : for (i = 0; i < num_channels; i++) {
1308 0 : if (channel == chan_list[i])
1309 0 : break;
1310 : }
1311 3 : if (i != num_channels)
1312 0 : continue;
1313 :
1314 3 : chan_list[num_channels++] = channel;
1315 : }
1316 : }
1317 :
1318 4 : sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
1319 4 : return 1;
1320 : }
1321 :
1322 :
1323 4 : static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
1324 : u16 num_modes,
1325 : enum hostapd_hw_mode mode)
1326 : {
1327 : u16 i;
1328 :
1329 4 : for (i = 0; i < num_modes; i++) {
1330 4 : if (modes[i].mode == mode)
1331 4 : return &modes[i];
1332 : }
1333 :
1334 0 : return NULL;
1335 : }
1336 :
1337 :
1338 4 : static void wpa_obss_scan_freqs_list(struct wpa_supplicant *wpa_s,
1339 : struct wpa_driver_scan_params *params)
1340 : {
1341 : /* Include only affected channels */
1342 : struct hostapd_hw_modes *mode;
1343 : int count, i;
1344 : int start, end;
1345 :
1346 4 : mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes,
1347 : HOSTAPD_MODE_IEEE80211G);
1348 4 : if (mode == NULL) {
1349 : /* No channels supported in this band - use empty list */
1350 0 : params->freqs = os_zalloc(sizeof(int));
1351 0 : return;
1352 : }
1353 :
1354 7 : if (wpa_s->sme.ht_sec_chan == HT_SEC_CHAN_UNKNOWN &&
1355 3 : wpa_s->current_bss) {
1356 : const u8 *ie;
1357 :
1358 3 : ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_OPERATION);
1359 3 : if (ie && ie[1] >= 2) {
1360 : u8 o;
1361 :
1362 3 : o = ie[3] & HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK;
1363 3 : if (o == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
1364 0 : wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_ABOVE;
1365 3 : else if (o == HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
1366 3 : wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_BELOW;
1367 : }
1368 : }
1369 :
1370 4 : start = wpa_s->assoc_freq - 10;
1371 4 : end = wpa_s->assoc_freq + 10;
1372 4 : switch (wpa_s->sme.ht_sec_chan) {
1373 : case HT_SEC_CHAN_UNKNOWN:
1374 : /* HT40+ possible on channels 1..9 */
1375 0 : if (wpa_s->assoc_freq <= 2452)
1376 0 : start -= 20;
1377 : /* HT40- possible on channels 5-13 */
1378 0 : if (wpa_s->assoc_freq >= 2432)
1379 0 : end += 20;
1380 0 : break;
1381 : case HT_SEC_CHAN_ABOVE:
1382 0 : end += 20;
1383 0 : break;
1384 : case HT_SEC_CHAN_BELOW:
1385 4 : start -= 20;
1386 4 : break;
1387 : }
1388 4 : wpa_printf(MSG_DEBUG,
1389 : "OBSS: assoc_freq %d possible affected range %d-%d",
1390 : wpa_s->assoc_freq, start, end);
1391 :
1392 4 : params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
1393 4 : if (params->freqs == NULL)
1394 0 : return;
1395 60 : for (count = 0, i = 0; i < mode->num_channels; i++) {
1396 : int freq;
1397 :
1398 56 : if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
1399 0 : continue;
1400 56 : freq = mode->channels[i].freq;
1401 56 : if (freq - 10 >= end || freq + 10 <= start)
1402 20 : continue; /* not affected */
1403 36 : params->freqs[count++] = freq;
1404 : }
1405 : }
1406 :
1407 :
1408 4 : static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1409 : {
1410 4 : struct wpa_supplicant *wpa_s = eloop_ctx;
1411 : struct wpa_driver_scan_params params;
1412 :
1413 4 : if (!wpa_s->current_bss) {
1414 0 : wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
1415 4 : return;
1416 : }
1417 :
1418 4 : os_memset(¶ms, 0, sizeof(params));
1419 4 : wpa_obss_scan_freqs_list(wpa_s, ¶ms);
1420 4 : params.low_priority = 1;
1421 4 : wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
1422 :
1423 4 : if (wpa_supplicant_trigger_scan(wpa_s, ¶ms))
1424 0 : wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
1425 : else
1426 4 : wpa_s->sme.sched_obss_scan = 1;
1427 4 : os_free(params.freqs);
1428 :
1429 4 : eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1430 : sme_obss_scan_timeout, wpa_s, NULL);
1431 : }
1432 :
1433 :
1434 17585 : void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
1435 : {
1436 : const u8 *ie;
1437 17585 : struct wpa_bss *bss = wpa_s->current_bss;
1438 17585 : struct wpa_ssid *ssid = wpa_s->current_ssid;
1439 17585 : struct hostapd_hw_modes *hw_mode = NULL;
1440 : int i;
1441 :
1442 17585 : eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1443 17585 : wpa_s->sme.sched_obss_scan = 0;
1444 17585 : wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_UNKNOWN;
1445 17585 : if (!enable)
1446 14902 : return;
1447 :
1448 : /*
1449 : * Schedule OBSS scan if driver is using station SME in wpa_supplicant
1450 : * or it expects OBSS scan to be performed by wpa_supplicant.
1451 : */
1452 2960 : if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
1453 2683 : (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
1454 2406 : ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
1455 639 : return;
1456 :
1457 2044 : if (!wpa_s->hw.modes)
1458 0 : return;
1459 :
1460 : /* only HT caps in 11g mode are relevant */
1461 2044 : for (i = 0; i < wpa_s->hw.num_modes; i++) {
1462 2044 : hw_mode = &wpa_s->hw.modes[i];
1463 2044 : if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
1464 2044 : break;
1465 : }
1466 :
1467 : /* Driver does not support HT40 for 11g or doesn't have 11g. */
1468 4088 : if (i == wpa_s->hw.num_modes || !hw_mode ||
1469 2044 : !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1470 0 : return;
1471 :
1472 2044 : if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
1473 49 : return; /* Not associated on 2.4 GHz band */
1474 :
1475 : /* Check whether AP supports HT40 */
1476 1995 : ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
1477 3961 : if (!ie || ie[1] < 2 ||
1478 1966 : !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1479 1975 : return; /* AP does not support HT40 */
1480 :
1481 20 : ie = wpa_bss_get_ie(wpa_s->current_bss,
1482 : WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
1483 20 : if (!ie || ie[1] < 14)
1484 16 : return; /* AP does not request OBSS scans */
1485 :
1486 4 : wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
1487 4 : if (wpa_s->sme.obss_scan_int < 10) {
1488 2 : wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
1489 : "replaced with the minimum 10 sec",
1490 2 : wpa_s->sme.obss_scan_int);
1491 2 : wpa_s->sme.obss_scan_int = 10;
1492 : }
1493 4 : wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
1494 4 : wpa_s->sme.obss_scan_int);
1495 4 : eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1496 : sme_obss_scan_timeout, wpa_s, NULL);
1497 : }
1498 :
1499 :
1500 : #ifdef CONFIG_IEEE80211W
1501 :
1502 : static const unsigned int sa_query_max_timeout = 1000;
1503 : static const unsigned int sa_query_retry_timeout = 201;
1504 :
1505 5 : static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
1506 : {
1507 : u32 tu;
1508 : struct os_reltime now, passed;
1509 5 : os_get_reltime(&now);
1510 5 : os_reltime_sub(&now, &wpa_s->sme.sa_query_start, &passed);
1511 5 : tu = (passed.sec * 1000000 + passed.usec) / 1024;
1512 5 : if (sa_query_max_timeout < tu) {
1513 1 : wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
1514 1 : sme_stop_sa_query(wpa_s);
1515 1 : wpa_supplicant_deauthenticate(
1516 : wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
1517 1 : return 1;
1518 : }
1519 :
1520 4 : return 0;
1521 : }
1522 :
1523 :
1524 8 : static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
1525 : const u8 *trans_id)
1526 : {
1527 : u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
1528 8 : wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
1529 : MACSTR, MAC2STR(wpa_s->bssid));
1530 8 : wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
1531 : trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1532 8 : req[0] = WLAN_ACTION_SA_QUERY;
1533 8 : req[1] = WLAN_SA_QUERY_REQUEST;
1534 8 : os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1535 8 : if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1536 8 : wpa_s->own_addr, wpa_s->bssid,
1537 : req, sizeof(req), 0) < 0)
1538 0 : wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
1539 : "Request");
1540 8 : }
1541 :
1542 :
1543 9 : static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
1544 : {
1545 9 : struct wpa_supplicant *wpa_s = eloop_ctx;
1546 : unsigned int timeout, sec, usec;
1547 : u8 *trans_id, *nbuf;
1548 :
1549 14 : if (wpa_s->sme.sa_query_count > 0 &&
1550 5 : sme_check_sa_query_timeout(wpa_s))
1551 1 : return;
1552 :
1553 8 : nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
1554 8 : wpa_s->sme.sa_query_count + 1,
1555 : WLAN_SA_QUERY_TR_ID_LEN);
1556 8 : if (nbuf == NULL)
1557 0 : return;
1558 8 : if (wpa_s->sme.sa_query_count == 0) {
1559 : /* Starting a new SA Query procedure */
1560 4 : os_get_reltime(&wpa_s->sme.sa_query_start);
1561 : }
1562 8 : trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
1563 8 : wpa_s->sme.sa_query_trans_id = nbuf;
1564 8 : wpa_s->sme.sa_query_count++;
1565 :
1566 8 : if (os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN) < 0) {
1567 0 : wpa_printf(MSG_DEBUG, "Could not generate SA Query ID");
1568 0 : return;
1569 : }
1570 :
1571 8 : timeout = sa_query_retry_timeout;
1572 8 : sec = ((timeout / 1000) * 1024) / 1000;
1573 8 : usec = (timeout % 1000) * 1024;
1574 8 : eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
1575 :
1576 8 : wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
1577 : wpa_s->sme.sa_query_count);
1578 :
1579 8 : sme_send_sa_query_req(wpa_s, trans_id);
1580 : }
1581 :
1582 :
1583 4 : static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
1584 : {
1585 4 : sme_sa_query_timer(wpa_s, NULL);
1586 4 : }
1587 :
1588 :
1589 616 : static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
1590 : {
1591 616 : eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
1592 616 : os_free(wpa_s->sme.sa_query_trans_id);
1593 616 : wpa_s->sme.sa_query_trans_id = NULL;
1594 616 : wpa_s->sme.sa_query_count = 0;
1595 616 : }
1596 :
1597 :
1598 38 : void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1599 : const u8 *da, u16 reason_code)
1600 : {
1601 : struct wpa_ssid *ssid;
1602 : struct os_reltime now;
1603 :
1604 38 : if (wpa_s->wpa_state != WPA_COMPLETED)
1605 34 : return;
1606 38 : ssid = wpa_s->current_ssid;
1607 38 : if (wpas_get_ssid_pmf(wpa_s, ssid) == NO_MGMT_FRAME_PROTECTION)
1608 0 : return;
1609 38 : if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1610 0 : return;
1611 38 : if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1612 : reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1613 4 : return;
1614 34 : if (wpa_s->sme.sa_query_count > 0)
1615 7 : return;
1616 :
1617 27 : os_get_reltime(&now);
1618 51 : if (wpa_s->sme.last_unprot_disconnect.sec &&
1619 24 : !os_reltime_expired(&now, &wpa_s->sme.last_unprot_disconnect, 10))
1620 23 : return; /* limit SA Query procedure frequency */
1621 4 : wpa_s->sme.last_unprot_disconnect = now;
1622 :
1623 4 : wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1624 : "possible AP/STA state mismatch - trigger SA Query");
1625 4 : sme_start_sa_query(wpa_s);
1626 : }
1627 :
1628 :
1629 3 : void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1630 : const u8 *data, size_t len)
1631 : {
1632 : int i;
1633 :
1634 3 : if (wpa_s->sme.sa_query_trans_id == NULL ||
1635 3 : len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1636 3 : data[0] != WLAN_SA_QUERY_RESPONSE)
1637 0 : return;
1638 3 : wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1639 : MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1640 :
1641 3 : if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1642 0 : return;
1643 :
1644 3 : for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1645 3 : if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1646 : i * WLAN_SA_QUERY_TR_ID_LEN,
1647 : data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1648 3 : break;
1649 : }
1650 :
1651 3 : if (i >= wpa_s->sme.sa_query_count) {
1652 0 : wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1653 : "transaction identifier found");
1654 0 : return;
1655 : }
1656 :
1657 3 : wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1658 : "from " MACSTR, MAC2STR(sa));
1659 3 : sme_stop_sa_query(wpa_s);
1660 : }
1661 :
1662 : #endif /* CONFIG_IEEE80211W */
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