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[thirdparty/hostap.git] / wpa_supplicant / sme.c
1 /*
2 * wpa_supplicant - SME
3 * Copyright (c) 2009-2010, 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 "rsn_supp/wpa.h"
18 #include "rsn_supp/pmksa_cache.h"
19 #include "config.h"
20 #include "wpa_supplicant_i.h"
21 #include "driver_i.h"
22 #include "wpas_glue.h"
23 #include "wps_supplicant.h"
24 #include "p2p_supplicant.h"
25 #include "notify.h"
26 #include "bss.h"
27 #include "scan.h"
28 #include "sme.h"
29 #include "hs20_supplicant.h"
30
31 #define SME_AUTH_TIMEOUT 5
32 #define SME_ASSOC_TIMEOUT 5
33
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 */
40
41
42 void sme_authenticate(struct wpa_supplicant *wpa_s,
43 struct wpa_bss *bss, struct wpa_ssid *ssid)
44 {
45 struct wpa_driver_auth_params params;
46 struct wpa_ssid *old_ssid;
47 #ifdef CONFIG_IEEE80211R
48 const u8 *ie;
49 #endif /* CONFIG_IEEE80211R */
50 #ifdef CONFIG_IEEE80211R
51 const u8 *md = NULL;
52 #endif /* CONFIG_IEEE80211R */
53 int i, bssid_changed;
54
55 if (bss == NULL) {
56 wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for "
57 "the network");
58 return;
59 }
60
61 wpa_s->current_bss = bss;
62
63 os_memset(&params, 0, sizeof(params));
64 wpa_s->reassociate = 0;
65
66 params.freq = bss->freq;
67 params.bssid = bss->bssid;
68 params.ssid = bss->ssid;
69 params.ssid_len = bss->ssid_len;
70 params.p2p = ssid->p2p_group;
71
72 if (wpa_s->sme.ssid_len != params.ssid_len ||
73 os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
74 wpa_s->sme.prev_bssid_set = 0;
75
76 wpa_s->sme.freq = params.freq;
77 os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
78 wpa_s->sme.ssid_len = params.ssid_len;
79
80 params.auth_alg = WPA_AUTH_ALG_OPEN;
81 #ifdef IEEE8021X_EAPOL
82 if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
83 if (ssid->leap) {
84 if (ssid->non_leap == 0)
85 params.auth_alg = WPA_AUTH_ALG_LEAP;
86 else
87 params.auth_alg |= WPA_AUTH_ALG_LEAP;
88 }
89 }
90 #endif /* IEEE8021X_EAPOL */
91 wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
92 params.auth_alg);
93 if (ssid->auth_alg) {
94 params.auth_alg = ssid->auth_alg;
95 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
96 "0x%x", params.auth_alg);
97 }
98
99 for (i = 0; i < NUM_WEP_KEYS; i++) {
100 if (ssid->wep_key_len[i])
101 params.wep_key[i] = ssid->wep_key[i];
102 params.wep_key_len[i] = ssid->wep_key_len[i];
103 }
104 params.wep_tx_keyidx = ssid->wep_tx_keyidx;
105
106 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
107 os_memset(wpa_s->bssid, 0, ETH_ALEN);
108 os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
109 if (bssid_changed)
110 wpas_notify_bssid_changed(wpa_s);
111
112 if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
113 wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
114 wpa_key_mgmt_wpa(ssid->key_mgmt)) {
115 int try_opportunistic;
116 try_opportunistic = ssid->proactive_key_caching &&
117 (ssid->proto & WPA_PROTO_RSN);
118 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
119 wpa_s->current_ssid,
120 try_opportunistic) == 0)
121 eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
122 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
123 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
124 wpa_s->sme.assoc_req_ie,
125 &wpa_s->sme.assoc_req_ie_len)) {
126 wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
127 "key management and encryption suites");
128 return;
129 }
130 } else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
131 wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) {
132 /*
133 * Both WPA and non-WPA IEEE 802.1X enabled in configuration -
134 * use non-WPA since the scan results did not indicate that the
135 * AP is using WPA or WPA2.
136 */
137 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
138 wpa_s->sme.assoc_req_ie_len = 0;
139 } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
140 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
141 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
142 wpa_s->sme.assoc_req_ie,
143 &wpa_s->sme.assoc_req_ie_len)) {
144 wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
145 "key management and encryption suites (no "
146 "scan results)");
147 return;
148 }
149 #ifdef CONFIG_WPS
150 } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
151 struct wpabuf *wps_ie;
152 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
153 if (wps_ie && wpabuf_len(wps_ie) <=
154 sizeof(wpa_s->sme.assoc_req_ie)) {
155 wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
156 os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
157 wpa_s->sme.assoc_req_ie_len);
158 } else
159 wpa_s->sme.assoc_req_ie_len = 0;
160 wpabuf_free(wps_ie);
161 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
162 #endif /* CONFIG_WPS */
163 } else {
164 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
165 wpa_s->sme.assoc_req_ie_len = 0;
166 }
167
168 #ifdef CONFIG_IEEE80211R
169 ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
170 if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
171 md = ie + 2;
172 wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
173 if (md) {
174 /* Prepare for the next transition */
175 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
176 }
177
178 if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) {
179 if (wpa_s->sme.assoc_req_ie_len + 5 <
180 sizeof(wpa_s->sme.assoc_req_ie)) {
181 struct rsn_mdie *mdie;
182 u8 *pos = wpa_s->sme.assoc_req_ie +
183 wpa_s->sme.assoc_req_ie_len;
184 *pos++ = WLAN_EID_MOBILITY_DOMAIN;
185 *pos++ = sizeof(*mdie);
186 mdie = (struct rsn_mdie *) pos;
187 os_memcpy(mdie->mobility_domain, md,
188 MOBILITY_DOMAIN_ID_LEN);
189 mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
190 wpa_s->sme.assoc_req_ie_len += 5;
191 }
192
193 if (wpa_s->sme.ft_used &&
194 os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
195 wpa_sm_has_ptk(wpa_s->wpa)) {
196 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT "
197 "over-the-air");
198 params.auth_alg = WPA_AUTH_ALG_FT;
199 params.ie = wpa_s->sme.ft_ies;
200 params.ie_len = wpa_s->sme.ft_ies_len;
201 }
202 }
203 #endif /* CONFIG_IEEE80211R */
204
205 #ifdef CONFIG_IEEE80211W
206 wpa_s->sme.mfp = ssid->ieee80211w;
207 if (ssid->ieee80211w != NO_MGMT_FRAME_PROTECTION) {
208 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
209 struct wpa_ie_data _ie;
210 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
211 _ie.capabilities &
212 (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
213 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
214 "MFP: require MFP");
215 wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
216 }
217 }
218 #endif /* CONFIG_IEEE80211W */
219
220 #ifdef CONFIG_P2P
221 if (wpa_s->global->p2p) {
222 u8 *pos;
223 size_t len;
224 int res;
225 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
226 len = sizeof(wpa_s->sme.assoc_req_ie) -
227 wpa_s->sme.assoc_req_ie_len;
228 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
229 ssid->p2p_group);
230 if (res >= 0)
231 wpa_s->sme.assoc_req_ie_len += res;
232 }
233 #endif /* CONFIG_P2P */
234
235 #ifdef CONFIG_HS20
236 if (wpa_s->conf->hs20) {
237 struct wpabuf *hs20;
238 hs20 = wpabuf_alloc(20);
239 if (hs20) {
240 wpas_hs20_add_indication(hs20);
241 os_memcpy(wpa_s->sme.assoc_req_ie +
242 wpa_s->sme.assoc_req_ie_len,
243 wpabuf_head(hs20), wpabuf_len(hs20));
244 wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
245 wpabuf_free(hs20);
246 }
247 }
248 #endif /* CONFIG_HS20 */
249
250 #ifdef CONFIG_INTERWORKING
251 if (wpa_s->conf->interworking) {
252 u8 *pos = wpa_s->sme.assoc_req_ie;
253 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
254 pos += 2 + pos[1];
255 os_memmove(pos + 6, pos,
256 wpa_s->sme.assoc_req_ie_len -
257 (pos - wpa_s->sme.assoc_req_ie));
258 wpa_s->sme.assoc_req_ie_len += 6;
259 *pos++ = WLAN_EID_EXT_CAPAB;
260 *pos++ = 4;
261 *pos++ = 0x00;
262 *pos++ = 0x00;
263 *pos++ = 0x00;
264 *pos++ = 0x80; /* Bit 31 - Interworking */
265 }
266 #endif /* CONFIG_INTERWORKING */
267
268 wpa_supplicant_cancel_sched_scan(wpa_s);
269 wpa_supplicant_cancel_scan(wpa_s);
270
271 wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
272 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
273 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
274
275 wpa_clear_keys(wpa_s, bss->bssid);
276 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
277 old_ssid = wpa_s->current_ssid;
278 wpa_s->current_ssid = ssid;
279 wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
280 wpa_supplicant_initiate_eapol(wpa_s);
281 if (old_ssid != wpa_s->current_ssid)
282 wpas_notify_network_changed(wpa_s);
283
284 wpa_s->sme.auth_alg = params.auth_alg;
285 if (wpa_drv_authenticate(wpa_s, &params) < 0) {
286 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
287 "driver failed");
288 wpas_connection_failed(wpa_s, bss->bssid);
289 wpa_supplicant_mark_disassoc(wpa_s);
290 return;
291 }
292
293 eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
294 NULL);
295
296 /*
297 * Association will be started based on the authentication event from
298 * the driver.
299 */
300 }
301
302
303 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
304 {
305 struct wpa_ssid *ssid = wpa_s->current_ssid;
306
307 if (ssid == NULL) {
308 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
309 "when network is not selected");
310 return;
311 }
312
313 if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
314 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
315 "when not in authenticating state");
316 return;
317 }
318
319 if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
320 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
321 "unexpected peer " MACSTR,
322 MAC2STR(data->auth.peer));
323 return;
324 }
325
326 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
327 " auth_type=%d status_code=%d",
328 MAC2STR(data->auth.peer), data->auth.auth_type,
329 data->auth.status_code);
330 wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
331 data->auth.ies, data->auth.ies_len);
332
333 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
334
335 if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
336 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
337 "code %d)", data->auth.status_code);
338
339 if (data->auth.status_code !=
340 WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
341 wpa_s->sme.auth_alg == data->auth.auth_type ||
342 wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
343 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
344 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
345 return;
346 }
347
348 switch (data->auth.auth_type) {
349 case WLAN_AUTH_OPEN:
350 wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
351
352 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
353 wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
354 wpa_s->current_ssid);
355 return;
356
357 case WLAN_AUTH_SHARED_KEY:
358 wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
359
360 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
361 wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
362 wpa_s->current_ssid);
363 return;
364
365 default:
366 return;
367 }
368 }
369
370 #ifdef CONFIG_IEEE80211R
371 if (data->auth.auth_type == WLAN_AUTH_FT) {
372 union wpa_event_data edata;
373 os_memset(&edata, 0, sizeof(edata));
374 edata.ft_ies.ies = data->auth.ies;
375 edata.ft_ies.ies_len = data->auth.ies_len;
376 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
377 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
378 }
379 #endif /* CONFIG_IEEE80211R */
380
381 sme_associate(wpa_s, ssid->mode, data->auth.peer,
382 data->auth.auth_type);
383 }
384
385
386 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
387 const u8 *bssid, u16 auth_type)
388 {
389 struct wpa_driver_associate_params params;
390 struct ieee802_11_elems elems;
391 #ifdef CONFIG_HT_OVERRIDES
392 struct ieee80211_ht_capabilities htcaps;
393 struct ieee80211_ht_capabilities htcaps_mask;
394 #endif /* CONFIG_HT_OVERRIDES */
395
396 os_memset(&params, 0, sizeof(params));
397 params.bssid = bssid;
398 params.ssid = wpa_s->sme.ssid;
399 params.ssid_len = wpa_s->sme.ssid_len;
400 params.freq = wpa_s->sme.freq;
401 params.bg_scan_period = wpa_s->current_ssid ?
402 wpa_s->current_ssid->bg_scan_period : -1;
403 params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
404 wpa_s->sme.assoc_req_ie : NULL;
405 params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
406 params.pairwise_suite = cipher_suite2driver(wpa_s->pairwise_cipher);
407 params.group_suite = cipher_suite2driver(wpa_s->group_cipher);
408 #ifdef CONFIG_HT_OVERRIDES
409 os_memset(&htcaps, 0, sizeof(htcaps));
410 os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
411 params.htcaps = (u8 *) &htcaps;
412 params.htcaps_mask = (u8 *) &htcaps_mask;
413 wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, &params);
414 #endif /* CONFIG_HT_OVERRIDES */
415 #ifdef CONFIG_IEEE80211R
416 if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
417 params.wpa_ie = wpa_s->sme.ft_ies;
418 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
419 }
420 #endif /* CONFIG_IEEE80211R */
421 params.mode = mode;
422 params.mgmt_frame_protection = wpa_s->sme.mfp;
423 if (wpa_s->sme.prev_bssid_set)
424 params.prev_bssid = wpa_s->sme.prev_bssid;
425
426 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
427 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
428 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
429 params.freq);
430
431 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
432
433 if (params.wpa_ie == NULL ||
434 ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
435 < 0) {
436 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
437 os_memset(&elems, 0, sizeof(elems));
438 }
439 if (elems.rsn_ie) {
440 params.wpa_proto = WPA_PROTO_RSN;
441 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
442 elems.rsn_ie_len + 2);
443 } else if (elems.wpa_ie) {
444 params.wpa_proto = WPA_PROTO_WPA;
445 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
446 elems.wpa_ie_len + 2);
447 } else
448 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
449 if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
450 params.p2p = 1;
451
452 if (wpa_s->parent->set_sta_uapsd)
453 params.uapsd = wpa_s->parent->sta_uapsd;
454 else
455 params.uapsd = -1;
456
457 if (wpa_drv_associate(wpa_s, &params) < 0) {
458 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
459 "driver failed");
460 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
461 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
462 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
463 return;
464 }
465
466 eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
467 NULL);
468 }
469
470
471 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
472 const u8 *ies, size_t ies_len)
473 {
474 if (md == NULL || ies == NULL) {
475 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
476 os_free(wpa_s->sme.ft_ies);
477 wpa_s->sme.ft_ies = NULL;
478 wpa_s->sme.ft_ies_len = 0;
479 wpa_s->sme.ft_used = 0;
480 return 0;
481 }
482
483 os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
484 wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
485 os_free(wpa_s->sme.ft_ies);
486 wpa_s->sme.ft_ies = os_malloc(ies_len);
487 if (wpa_s->sme.ft_ies == NULL)
488 return -1;
489 os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
490 wpa_s->sme.ft_ies_len = ies_len;
491 return 0;
492 }
493
494
495 static void sme_deauth(struct wpa_supplicant *wpa_s)
496 {
497 int bssid_changed;
498
499 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
500
501 if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
502 WLAN_REASON_DEAUTH_LEAVING) < 0) {
503 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
504 "failed");
505 }
506 wpa_s->sme.prev_bssid_set = 0;
507
508 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
509 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
510 os_memset(wpa_s->bssid, 0, ETH_ALEN);
511 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
512 if (bssid_changed)
513 wpas_notify_bssid_changed(wpa_s);
514 }
515
516
517 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
518 union wpa_event_data *data)
519 {
520 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
521 "status code %d", MAC2STR(wpa_s->pending_bssid),
522 data->assoc_reject.status_code);
523
524 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
525
526 /*
527 * For now, unconditionally terminate the previous authentication. In
528 * theory, this should not be needed, but mac80211 gets quite confused
529 * if the authentication is left pending.. Some roaming cases might
530 * benefit from using the previous authentication, so this could be
531 * optimized in the future.
532 */
533 sme_deauth(wpa_s);
534 }
535
536
537 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
538 union wpa_event_data *data)
539 {
540 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
541 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
542 wpa_supplicant_mark_disassoc(wpa_s);
543 }
544
545
546 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
547 union wpa_event_data *data)
548 {
549 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
550 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
551 wpa_supplicant_mark_disassoc(wpa_s);
552 }
553
554
555 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
556 union wpa_event_data *data)
557 {
558 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
559 if (wpa_s->sme.prev_bssid_set) {
560 /*
561 * cfg80211/mac80211 can get into somewhat confused state if
562 * the AP only disassociates us and leaves us in authenticated
563 * state. For now, force the state to be cleared to avoid
564 * confusing errors if we try to associate with the AP again.
565 */
566 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
567 "driver state");
568 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
569 WLAN_REASON_DEAUTH_LEAVING);
570 }
571 }
572
573
574 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
575 {
576 struct wpa_supplicant *wpa_s = eloop_ctx;
577 if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
578 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
579 sme_deauth(wpa_s);
580 }
581 }
582
583
584 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
585 {
586 struct wpa_supplicant *wpa_s = eloop_ctx;
587 if (wpa_s->wpa_state == WPA_ASSOCIATING) {
588 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
589 sme_deauth(wpa_s);
590 }
591 }
592
593
594 void sme_state_changed(struct wpa_supplicant *wpa_s)
595 {
596 /* Make sure timers are cleaned up appropriately. */
597 if (wpa_s->wpa_state != WPA_ASSOCIATING)
598 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
599 if (wpa_s->wpa_state != WPA_AUTHENTICATING)
600 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
601 }
602
603
604 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
605 const u8 *prev_pending_bssid)
606 {
607 /*
608 * mac80211-workaround to force deauth on failed auth cmd,
609 * requires us to remain in authenticating state to allow the
610 * second authentication attempt to be continued properly.
611 */
612 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
613 "to proceed after disconnection event");
614 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
615 os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
616
617 /*
618 * Re-arm authentication timer in case auth fails for whatever reason.
619 */
620 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
621 eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
622 NULL);
623 }
624
625
626 void sme_deinit(struct wpa_supplicant *wpa_s)
627 {
628 os_free(wpa_s->sme.ft_ies);
629 wpa_s->sme.ft_ies = NULL;
630 wpa_s->sme.ft_ies_len = 0;
631 #ifdef CONFIG_IEEE80211W
632 sme_stop_sa_query(wpa_s);
633 #endif /* CONFIG_IEEE80211W */
634
635 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
636 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
637 eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
638 }
639
640
641 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
642 const u8 *chan_list, u8 num_channels,
643 u8 num_intol)
644 {
645 struct ieee80211_2040_bss_coex_ie *bc_ie;
646 struct ieee80211_2040_intol_chan_report *ic_report;
647 struct wpabuf *buf;
648
649 wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR,
650 MAC2STR(wpa_s->bssid));
651
652 buf = wpabuf_alloc(2 + /* action.category + action_code */
653 sizeof(struct ieee80211_2040_bss_coex_ie) +
654 sizeof(struct ieee80211_2040_intol_chan_report) +
655 num_channels);
656 if (buf == NULL)
657 return;
658
659 wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
660 wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
661
662 bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
663 bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
664 bc_ie->length = 1;
665 if (num_intol)
666 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
667
668 if (num_channels > 0) {
669 ic_report = wpabuf_put(buf, sizeof(*ic_report));
670 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
671 ic_report->length = num_channels + 1;
672 ic_report->op_class = 0;
673 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
674 num_channels);
675 }
676
677 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
678 wpa_s->own_addr, wpa_s->bssid,
679 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
680 wpa_msg(wpa_s, MSG_INFO,
681 "SME: Failed to send 20/40 BSS Coexistence frame");
682 }
683
684 wpabuf_free(buf);
685 }
686
687
688 /**
689 * enum wpas_band - Frequency band
690 * @WPAS_BAND_2GHZ: 2.4 GHz ISM band
691 * @WPAS_BAND_5GHZ: around 5 GHz band (4.9 - 5.7 GHz)
692 */
693 enum wpas_band {
694 WPAS_BAND_2GHZ,
695 WPAS_BAND_5GHZ,
696 WPAS_BAND_INVALID
697 };
698
699 /**
700 * freq_to_channel - Convert frequency into channel info
701 * @channel: Buffer for returning channel number
702 * Returns: Band (2 or 5 GHz)
703 */
704 static enum wpas_band freq_to_channel(int freq, u8 *channel)
705 {
706 enum wpas_band band = (freq <= 2484) ? WPAS_BAND_2GHZ : WPAS_BAND_5GHZ;
707 u8 chan = 0;
708
709 if (freq >= 2412 && freq <= 2472)
710 chan = (freq - 2407) / 5;
711 else if (freq == 2484)
712 chan = 14;
713 else if (freq >= 5180 && freq <= 5805)
714 chan = (freq - 5000) / 5;
715
716 *channel = chan;
717 return band;
718 }
719
720
721 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
722 {
723 struct wpa_bss *bss;
724 const u8 *ie;
725 u16 ht_cap;
726 u8 chan_list[P2P_MAX_CHANNELS], channel;
727 u8 num_channels = 0, num_intol = 0, i;
728
729 if (!wpa_s->sme.sched_obss_scan)
730 return 0;
731
732 wpa_s->sme.sched_obss_scan = 0;
733 if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
734 return 1;
735
736 /*
737 * Check whether AP uses regulatory triplet or channel triplet in
738 * country info. Right now the operating class of the BSS channel
739 * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
740 * based on the assumption that operating class triplet is not used in
741 * beacon frame. If the First Channel Number/Operating Extension
742 * Identifier octet has a positive integer value of 201 or greater,
743 * then its operating class triplet.
744 *
745 * TODO: If Supported Operating Classes element is present in beacon
746 * frame, have to lookup operating class in Annex E and fill them in
747 * 2040 coex frame.
748 */
749 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
750 if (ie && (ie[1] >= 6) && (ie[5] >= 201))
751 return 1;
752
753 os_memset(chan_list, 0, sizeof(chan_list));
754
755 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
756 /* Skip other band bss */
757 if (freq_to_channel(bss->freq, &channel) != WPAS_BAND_2GHZ)
758 continue;
759
760 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
761 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
762
763 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
764 /* Check whether the channel is already considered */
765 for (i = 0; i < num_channels; i++) {
766 if (channel == chan_list[i])
767 break;
768 }
769 if (i != num_channels)
770 continue;
771
772 if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
773 num_intol++;
774
775 chan_list[num_channels++] = channel;
776 }
777 }
778
779 sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
780 return 1;
781 }
782
783
784 static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
785 u16 num_modes,
786 enum hostapd_hw_mode mode)
787 {
788 u16 i;
789
790 for (i = 0; i < num_modes; i++) {
791 if (modes[i].mode == mode)
792 return &modes[i];
793 }
794
795 return NULL;
796 }
797
798
799 static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s,
800 enum hostapd_hw_mode band,
801 struct wpa_driver_scan_params *params)
802 {
803 /* Include only supported channels for the specified band */
804 struct hostapd_hw_modes *mode;
805 int count, i;
806
807 mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band);
808 if (mode == NULL) {
809 /* No channels supported in this band - use empty list */
810 params->freqs = os_zalloc(sizeof(int));
811 return;
812 }
813
814 params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
815 if (params->freqs == NULL)
816 return;
817 for (count = 0, i = 0; i < mode->num_channels; i++) {
818 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
819 continue;
820 params->freqs[count++] = mode->channels[i].freq;
821 }
822 }
823
824
825 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
826 {
827 struct wpa_supplicant *wpa_s = eloop_ctx;
828 struct wpa_driver_scan_params params;
829
830 if (!wpa_s->current_bss) {
831 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
832 return;
833 }
834
835 os_memset(&params, 0, sizeof(params));
836 wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G, &params);
837 wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
838
839 if (wpa_supplicant_trigger_scan(wpa_s, &params))
840 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
841 else
842 wpa_s->sme.sched_obss_scan = 1;
843 os_free(params.freqs);
844
845 eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
846 sme_obss_scan_timeout, wpa_s, NULL);
847 }
848
849
850 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
851 {
852 const u8 *ie;
853 struct wpa_bss *bss = wpa_s->current_bss;
854 struct wpa_ssid *ssid = wpa_s->current_ssid;
855 struct hostapd_hw_modes *hw_mode = NULL;
856 int i;
857
858 eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
859 wpa_s->sme.sched_obss_scan = 0;
860 if (!enable)
861 return;
862
863 if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) || ssid == NULL ||
864 ssid->mode != IEEE80211_MODE_INFRA)
865 return; /* Not using station SME in wpa_supplicant */
866
867 if (!wpa_s->hw.modes)
868 return;
869
870 /* only HT caps in 11g mode are relevant */
871 for (i = 0; i < wpa_s->hw.num_modes; i++) {
872 hw_mode = &wpa_s->hw.modes[i];
873 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
874 break;
875 }
876
877 /* Driver does not support HT40 for 11g or doesn't have 11g. */
878 if (i == wpa_s->hw.num_modes || !hw_mode ||
879 !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
880 return;
881
882 if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
883 return; /* Not associated on 2.4 GHz band */
884
885 /* Check whether AP supports HT40 */
886 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
887 if (!ie || ie[1] < 2 ||
888 !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
889 return; /* AP does not support HT40 */
890
891 ie = wpa_bss_get_ie(wpa_s->current_bss,
892 WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
893 if (!ie || ie[1] < 14)
894 return; /* AP does not request OBSS scans */
895
896 wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
897 if (wpa_s->sme.obss_scan_int < 10) {
898 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
899 "replaced with the minimum 10 sec",
900 wpa_s->sme.obss_scan_int);
901 wpa_s->sme.obss_scan_int = 10;
902 }
903 wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
904 wpa_s->sme.obss_scan_int);
905 eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
906 sme_obss_scan_timeout, wpa_s, NULL);
907 }
908
909
910 #ifdef CONFIG_IEEE80211W
911
912 static const unsigned int sa_query_max_timeout = 1000;
913 static const unsigned int sa_query_retry_timeout = 201;
914
915 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
916 {
917 u32 tu;
918 struct os_time now, passed;
919 os_get_time(&now);
920 os_time_sub(&now, &wpa_s->sme.sa_query_start, &passed);
921 tu = (passed.sec * 1000000 + passed.usec) / 1024;
922 if (sa_query_max_timeout < tu) {
923 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
924 sme_stop_sa_query(wpa_s);
925 wpa_supplicant_deauthenticate(
926 wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
927 return 1;
928 }
929
930 return 0;
931 }
932
933
934 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
935 const u8 *trans_id)
936 {
937 u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
938 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
939 MACSTR, MAC2STR(wpa_s->bssid));
940 wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
941 trans_id, WLAN_SA_QUERY_TR_ID_LEN);
942 req[0] = WLAN_ACTION_SA_QUERY;
943 req[1] = WLAN_SA_QUERY_REQUEST;
944 os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
945 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
946 wpa_s->own_addr, wpa_s->bssid,
947 req, sizeof(req), 0) < 0)
948 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
949 "Request");
950 }
951
952
953 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
954 {
955 struct wpa_supplicant *wpa_s = eloop_ctx;
956 unsigned int timeout, sec, usec;
957 u8 *trans_id, *nbuf;
958
959 if (wpa_s->sme.sa_query_count > 0 &&
960 sme_check_sa_query_timeout(wpa_s))
961 return;
962
963 nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
964 wpa_s->sme.sa_query_count + 1,
965 WLAN_SA_QUERY_TR_ID_LEN);
966 if (nbuf == NULL)
967 return;
968 if (wpa_s->sme.sa_query_count == 0) {
969 /* Starting a new SA Query procedure */
970 os_get_time(&wpa_s->sme.sa_query_start);
971 }
972 trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
973 wpa_s->sme.sa_query_trans_id = nbuf;
974 wpa_s->sme.sa_query_count++;
975
976 os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
977
978 timeout = sa_query_retry_timeout;
979 sec = ((timeout / 1000) * 1024) / 1000;
980 usec = (timeout % 1000) * 1024;
981 eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
982
983 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
984 wpa_s->sme.sa_query_count);
985
986 sme_send_sa_query_req(wpa_s, trans_id);
987 }
988
989
990 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
991 {
992 sme_sa_query_timer(wpa_s, NULL);
993 }
994
995
996 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
997 {
998 eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
999 os_free(wpa_s->sme.sa_query_trans_id);
1000 wpa_s->sme.sa_query_trans_id = NULL;
1001 wpa_s->sme.sa_query_count = 0;
1002 }
1003
1004
1005 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1006 const u8 *da, u16 reason_code)
1007 {
1008 struct wpa_ssid *ssid;
1009
1010 if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME))
1011 return;
1012 if (wpa_s->wpa_state != WPA_COMPLETED)
1013 return;
1014 ssid = wpa_s->current_ssid;
1015 if (ssid == NULL || ssid->ieee80211w == 0)
1016 return;
1017 if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1018 return;
1019 if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1020 reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1021 return;
1022 if (wpa_s->sme.sa_query_count > 0)
1023 return;
1024
1025 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1026 "possible AP/STA state mismatch - trigger SA Query");
1027 sme_start_sa_query(wpa_s);
1028 }
1029
1030
1031 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1032 const u8 *data, size_t len)
1033 {
1034 int i;
1035
1036 if (wpa_s->sme.sa_query_trans_id == NULL ||
1037 len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1038 data[0] != WLAN_SA_QUERY_RESPONSE)
1039 return;
1040 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1041 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1042
1043 if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1044 return;
1045
1046 for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1047 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1048 i * WLAN_SA_QUERY_TR_ID_LEN,
1049 data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1050 break;
1051 }
1052
1053 if (i >= wpa_s->sme.sa_query_count) {
1054 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1055 "transaction identifier found");
1056 return;
1057 }
1058
1059 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1060 "from " MACSTR, MAC2STR(sa));
1061 sme_stop_sa_query(wpa_s);
1062 }
1063
1064 #endif /* CONFIG_IEEE80211W */
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