events.c 36 KB

12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091929394959697989910010110210310410510610710810911011111211311411511611711811912012112212312412512612712812913013113213313413513613713813914014114214314414514614714814915015115215315415515615715815916016116216316416516616716816917017117217317417517617717817918018118218318418518618718818919019119219319419519619719819920020120220320420520620720820921021121221321421521621721821922022122222322422522622722822923023123223323423523623723823924024124224324424524624724824925025125225325425525625725825926026126226326426526626726826927027127227327427527627727827928028128228328428528628728828929029129229329429529629729829930030130230330430530630730830931031131231331431531631731831932032132232332432532632732832933033133233333433533633733833934034134234334434534634734834935035135235335435535635735835936036136236336436536636736836937037137237337437537637737837938038138238338438538638738838939039139239339439539639739839940040140240340440540640740840941041141241341441541641741841942042142242342442542642742842943043143243343443543643743843944044144244344444544644744844945045145245345445545645745845946046146246346446546646746846947047147247347447547647747847948048148248348448548648748848949049149249349449549649749849950050150250350450550650750850951051151251351451551651751851952052152252352452552652752852953053153253353453553653753853954054154254354454554654754854955055155255355455555655755855956056156256356456556656756856957057157257357457557657757857958058158258358458558658758858959059159259359459559659759859960060160260360460560660760860961061161261361461561661761861962062162262362462562662762862963063163263363463563663763863964064164264364464564664764864965065165265365465565665765865966066166266366466566666766866967067167267367467567667767867968068168268368468568668768868969069169269369469569669769869970070170270370470570670770870971071171271371471571671771871972072172272372472572672772872973073173273373473573673773873974074174274374474574674774874975075175275375475575675775875976076176276376476576676776876977077177277377477577677777877978078178278378478578678778878979079179279379479579679779879980080180280380480580680780880981081181281381481581681781881982082182282382482582682782882983083183283383483583683783883984084184284384484584684784884985085185285385485585685785885986086186286386486586686786886987087187287387487587687787887988088188288388488588688788888989089189289389489589689789889990090190290390490590690790890991091191291391491591691791891992092192292392492592692792892993093193293393493593693793893994094194294394494594694794894995095195295395495595695795895996096196296396496596696796896997097197297397497597697797897998098198298398498598698798898999099199299399499599699799899910001001100210031004100510061007100810091010101110121013101410151016101710181019102010211022102310241025102610271028102910301031103210331034103510361037103810391040104110421043104410451046104710481049105010511052105310541055105610571058105910601061106210631064106510661067106810691070107110721073107410751076107710781079108010811082108310841085108610871088108910901091109210931094109510961097109810991100110111021103110411051106110711081109111011111112111311141115111611171118111911201121112211231124112511261127112811291130113111321133113411351136113711381139114011411142114311441145114611471148114911501151115211531154115511561157115811591160116111621163116411651166116711681169117011711172117311741175117611771178117911801181118211831184118511861187118811891190119111921193119411951196119711981199120012011202120312041205120612071208120912101211121212131214121512161217121812191220122112221223122412251226122712281229123012311232123312341235123612371238123912401241124212431244124512461247124812491250125112521253125412551256125712581259126012611262126312641265126612671268126912701271127212731274127512761277127812791280128112821283128412851286128712881289129012911292129312941295129612971298129913001301130213031304130513061307130813091310131113121313131413151316131713181319132013211322132313241325132613271328132913301331133213331334133513361337133813391340134113421343134413451346134713481349135013511352135313541355135613571358135913601361
  1. /*
  2. * WPA Supplicant - Driver event processing
  3. * Copyright (c) 2003-2008, Jouni Malinen <j@w1.fi>
  4. *
  5. * This program is free software; you can redistribute it and/or modify
  6. * it under the terms of the GNU General Public License version 2 as
  7. * published by the Free Software Foundation.
  8. *
  9. * Alternatively, this software may be distributed under the terms of BSD
  10. * license.
  11. *
  12. * See README and COPYING for more details.
  13. */
  14. #include "includes.h"
  15. #include "common.h"
  16. #include "eapol_supp/eapol_supp_sm.h"
  17. #include "wpa.h"
  18. #include "eloop.h"
  19. #include "config.h"
  20. #include "l2_packet/l2_packet.h"
  21. #include "wpa_supplicant_i.h"
  22. #include "driver_i.h"
  23. #include "pcsc_funcs.h"
  24. #include "preauth.h"
  25. #include "pmksa_cache.h"
  26. #include "wpa_ctrl.h"
  27. #include "eap_peer/eap.h"
  28. #include "notify.h"
  29. #include "ieee802_11_defs.h"
  30. #include "blacklist.h"
  31. #include "wpas_glue.h"
  32. #include "wps_supplicant.h"
  33. #include "ibss_rsn.h"
  34. #include "sme.h"
  35. #include "bgscan.h"
  36. static int wpa_supplicant_select_config(struct wpa_supplicant *wpa_s)
  37. {
  38. struct wpa_ssid *ssid, *old_ssid;
  39. if (wpa_s->conf->ap_scan == 1 && wpa_s->current_ssid)
  40. return 0;
  41. wpa_printf(MSG_DEBUG, "Select network based on association "
  42. "information");
  43. ssid = wpa_supplicant_get_ssid(wpa_s);
  44. if (ssid == NULL) {
  45. wpa_printf(MSG_INFO, "No network configuration found for the "
  46. "current AP");
  47. return -1;
  48. }
  49. if (ssid->disabled) {
  50. wpa_printf(MSG_DEBUG, "Selected network is disabled");
  51. return -1;
  52. }
  53. wpa_printf(MSG_DEBUG, "Network configuration found for the current "
  54. "AP");
  55. if (ssid->key_mgmt & (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
  56. WPA_KEY_MGMT_WPA_NONE |
  57. WPA_KEY_MGMT_FT_PSK | WPA_KEY_MGMT_FT_IEEE8021X |
  58. WPA_KEY_MGMT_PSK_SHA256 |
  59. WPA_KEY_MGMT_IEEE8021X_SHA256)) {
  60. u8 wpa_ie[80];
  61. size_t wpa_ie_len = sizeof(wpa_ie);
  62. wpa_supplicant_set_suites(wpa_s, NULL, ssid,
  63. wpa_ie, &wpa_ie_len);
  64. } else {
  65. wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
  66. }
  67. if (wpa_s->current_ssid && wpa_s->current_ssid != ssid)
  68. eapol_sm_invalidate_cached_session(wpa_s->eapol);
  69. old_ssid = wpa_s->current_ssid;
  70. wpa_s->current_ssid = ssid;
  71. wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
  72. wpa_supplicant_initiate_eapol(wpa_s);
  73. if (old_ssid != wpa_s->current_ssid)
  74. wpas_notify_network_changed(wpa_s);
  75. return 0;
  76. }
  77. static void wpa_supplicant_stop_countermeasures(void *eloop_ctx,
  78. void *sock_ctx)
  79. {
  80. struct wpa_supplicant *wpa_s = eloop_ctx;
  81. if (wpa_s->countermeasures) {
  82. wpa_s->countermeasures = 0;
  83. wpa_drv_set_countermeasures(wpa_s, 0);
  84. wpa_msg(wpa_s, MSG_INFO, "WPA: TKIP countermeasures stopped");
  85. wpa_supplicant_req_scan(wpa_s, 0, 0);
  86. }
  87. }
  88. void wpa_supplicant_mark_disassoc(struct wpa_supplicant *wpa_s)
  89. {
  90. int bssid_changed;
  91. wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
  92. bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
  93. os_memset(wpa_s->bssid, 0, ETH_ALEN);
  94. os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
  95. if (bssid_changed)
  96. wpas_notify_bssid_changed(wpa_s);
  97. eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
  98. eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
  99. if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt))
  100. eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
  101. wpa_s->ap_ies_from_associnfo = 0;
  102. }
  103. static void wpa_find_assoc_pmkid(struct wpa_supplicant *wpa_s)
  104. {
  105. struct wpa_ie_data ie;
  106. int pmksa_set = -1;
  107. size_t i;
  108. if (wpa_sm_parse_own_wpa_ie(wpa_s->wpa, &ie) < 0 ||
  109. ie.pmkid == NULL)
  110. return;
  111. for (i = 0; i < ie.num_pmkid; i++) {
  112. pmksa_set = pmksa_cache_set_current(wpa_s->wpa,
  113. ie.pmkid + i * PMKID_LEN,
  114. NULL, NULL, 0);
  115. if (pmksa_set == 0) {
  116. eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
  117. break;
  118. }
  119. }
  120. wpa_printf(MSG_DEBUG, "RSN: PMKID from assoc IE %sfound from PMKSA "
  121. "cache", pmksa_set == 0 ? "" : "not ");
  122. }
  123. static void wpa_supplicant_event_pmkid_candidate(struct wpa_supplicant *wpa_s,
  124. union wpa_event_data *data)
  125. {
  126. if (data == NULL) {
  127. wpa_printf(MSG_DEBUG, "RSN: No data in PMKID candidate event");
  128. return;
  129. }
  130. wpa_printf(MSG_DEBUG, "RSN: PMKID candidate event - bssid=" MACSTR
  131. " index=%d preauth=%d",
  132. MAC2STR(data->pmkid_candidate.bssid),
  133. data->pmkid_candidate.index,
  134. data->pmkid_candidate.preauth);
  135. pmksa_candidate_add(wpa_s->wpa, data->pmkid_candidate.bssid,
  136. data->pmkid_candidate.index,
  137. data->pmkid_candidate.preauth);
  138. }
  139. static int wpa_supplicant_dynamic_keys(struct wpa_supplicant *wpa_s)
  140. {
  141. if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
  142. wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE)
  143. return 0;
  144. #ifdef IEEE8021X_EAPOL
  145. if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA &&
  146. wpa_s->current_ssid &&
  147. !(wpa_s->current_ssid->eapol_flags &
  148. (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
  149. EAPOL_FLAG_REQUIRE_KEY_BROADCAST))) {
  150. /* IEEE 802.1X, but not using dynamic WEP keys (i.e., either
  151. * plaintext or static WEP keys). */
  152. return 0;
  153. }
  154. #endif /* IEEE8021X_EAPOL */
  155. return 1;
  156. }
  157. /**
  158. * wpa_supplicant_scard_init - Initialize SIM/USIM access with PC/SC
  159. * @wpa_s: pointer to wpa_supplicant data
  160. * @ssid: Configuration data for the network
  161. * Returns: 0 on success, -1 on failure
  162. *
  163. * This function is called when starting authentication with a network that is
  164. * configured to use PC/SC for SIM/USIM access (EAP-SIM or EAP-AKA).
  165. */
  166. int wpa_supplicant_scard_init(struct wpa_supplicant *wpa_s,
  167. struct wpa_ssid *ssid)
  168. {
  169. #ifdef IEEE8021X_EAPOL
  170. int aka = 0, sim = 0, type;
  171. if (ssid->eap.pcsc == NULL || wpa_s->scard != NULL)
  172. return 0;
  173. if (ssid->eap.eap_methods == NULL) {
  174. sim = 1;
  175. aka = 1;
  176. } else {
  177. struct eap_method_type *eap = ssid->eap.eap_methods;
  178. while (eap->vendor != EAP_VENDOR_IETF ||
  179. eap->method != EAP_TYPE_NONE) {
  180. if (eap->vendor == EAP_VENDOR_IETF) {
  181. if (eap->method == EAP_TYPE_SIM)
  182. sim = 1;
  183. else if (eap->method == EAP_TYPE_AKA)
  184. aka = 1;
  185. }
  186. eap++;
  187. }
  188. }
  189. if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_SIM) == NULL)
  190. sim = 0;
  191. if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_AKA) == NULL)
  192. aka = 0;
  193. if (!sim && !aka) {
  194. wpa_printf(MSG_DEBUG, "Selected network is configured to use "
  195. "SIM, but neither EAP-SIM nor EAP-AKA are enabled");
  196. return 0;
  197. }
  198. wpa_printf(MSG_DEBUG, "Selected network is configured to use SIM "
  199. "(sim=%d aka=%d) - initialize PCSC", sim, aka);
  200. if (sim && aka)
  201. type = SCARD_TRY_BOTH;
  202. else if (aka)
  203. type = SCARD_USIM_ONLY;
  204. else
  205. type = SCARD_GSM_SIM_ONLY;
  206. wpa_s->scard = scard_init(type);
  207. if (wpa_s->scard == NULL) {
  208. wpa_printf(MSG_WARNING, "Failed to initialize SIM "
  209. "(pcsc-lite)");
  210. return -1;
  211. }
  212. wpa_sm_set_scard_ctx(wpa_s->wpa, wpa_s->scard);
  213. eapol_sm_register_scard_ctx(wpa_s->eapol, wpa_s->scard);
  214. #endif /* IEEE8021X_EAPOL */
  215. return 0;
  216. }
  217. #ifndef CONFIG_NO_SCAN_PROCESSING
  218. static int wpa_supplicant_match_privacy(struct wpa_scan_res *bss,
  219. struct wpa_ssid *ssid)
  220. {
  221. int i, privacy = 0;
  222. if (ssid->mixed_cell)
  223. return 1;
  224. #ifdef CONFIG_WPS
  225. if (ssid->key_mgmt & WPA_KEY_MGMT_WPS)
  226. return 1;
  227. #endif /* CONFIG_WPS */
  228. for (i = 0; i < NUM_WEP_KEYS; i++) {
  229. if (ssid->wep_key_len[i]) {
  230. privacy = 1;
  231. break;
  232. }
  233. }
  234. #ifdef IEEE8021X_EAPOL
  235. if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
  236. ssid->eapol_flags & (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
  237. EAPOL_FLAG_REQUIRE_KEY_BROADCAST))
  238. privacy = 1;
  239. #endif /* IEEE8021X_EAPOL */
  240. if (bss->caps & IEEE80211_CAP_PRIVACY)
  241. return privacy;
  242. return !privacy;
  243. }
  244. static int wpa_supplicant_ssid_bss_match(struct wpa_supplicant *wpa_s,
  245. struct wpa_ssid *ssid,
  246. struct wpa_scan_res *bss)
  247. {
  248. struct wpa_ie_data ie;
  249. int proto_match = 0;
  250. const u8 *rsn_ie, *wpa_ie;
  251. int ret;
  252. ret = wpas_wps_ssid_bss_match(wpa_s, ssid, bss);
  253. if (ret >= 0)
  254. return ret;
  255. rsn_ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
  256. while ((ssid->proto & WPA_PROTO_RSN) && rsn_ie) {
  257. proto_match++;
  258. if (wpa_parse_wpa_ie(rsn_ie, 2 + rsn_ie[1], &ie)) {
  259. wpa_printf(MSG_DEBUG, " skip RSN IE - parse failed");
  260. break;
  261. }
  262. if (!(ie.proto & ssid->proto)) {
  263. wpa_printf(MSG_DEBUG, " skip RSN IE - proto "
  264. "mismatch");
  265. break;
  266. }
  267. if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
  268. wpa_printf(MSG_DEBUG, " skip RSN IE - PTK cipher "
  269. "mismatch");
  270. break;
  271. }
  272. if (!(ie.group_cipher & ssid->group_cipher)) {
  273. wpa_printf(MSG_DEBUG, " skip RSN IE - GTK cipher "
  274. "mismatch");
  275. break;
  276. }
  277. if (!(ie.key_mgmt & ssid->key_mgmt)) {
  278. wpa_printf(MSG_DEBUG, " skip RSN IE - key mgmt "
  279. "mismatch");
  280. break;
  281. }
  282. #ifdef CONFIG_IEEE80211W
  283. if (!(ie.capabilities & WPA_CAPABILITY_MFPC) &&
  284. ssid->ieee80211w == IEEE80211W_REQUIRED) {
  285. wpa_printf(MSG_DEBUG, " skip RSN IE - no mgmt frame "
  286. "protection");
  287. break;
  288. }
  289. #endif /* CONFIG_IEEE80211W */
  290. wpa_printf(MSG_DEBUG, " selected based on RSN IE");
  291. return 1;
  292. }
  293. wpa_ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
  294. while ((ssid->proto & WPA_PROTO_WPA) && wpa_ie) {
  295. proto_match++;
  296. if (wpa_parse_wpa_ie(wpa_ie, 2 + wpa_ie[1], &ie)) {
  297. wpa_printf(MSG_DEBUG, " skip WPA IE - parse failed");
  298. break;
  299. }
  300. if (!(ie.proto & ssid->proto)) {
  301. wpa_printf(MSG_DEBUG, " skip WPA IE - proto "
  302. "mismatch");
  303. break;
  304. }
  305. if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
  306. wpa_printf(MSG_DEBUG, " skip WPA IE - PTK cipher "
  307. "mismatch");
  308. break;
  309. }
  310. if (!(ie.group_cipher & ssid->group_cipher)) {
  311. wpa_printf(MSG_DEBUG, " skip WPA IE - GTK cipher "
  312. "mismatch");
  313. break;
  314. }
  315. if (!(ie.key_mgmt & ssid->key_mgmt)) {
  316. wpa_printf(MSG_DEBUG, " skip WPA IE - key mgmt "
  317. "mismatch");
  318. break;
  319. }
  320. wpa_printf(MSG_DEBUG, " selected based on WPA IE");
  321. return 1;
  322. }
  323. if (proto_match == 0)
  324. wpa_printf(MSG_DEBUG, " skip - no WPA/RSN proto match");
  325. return 0;
  326. }
  327. static struct wpa_scan_res *
  328. wpa_supplicant_select_bss_wpa(struct wpa_supplicant *wpa_s,
  329. struct wpa_ssid *group,
  330. struct wpa_ssid **selected_ssid)
  331. {
  332. struct wpa_ssid *ssid;
  333. struct wpa_scan_res *bss;
  334. size_t i;
  335. struct wpa_blacklist *e;
  336. const u8 *ie;
  337. wpa_printf(MSG_DEBUG, "Try to find WPA-enabled AP");
  338. for (i = 0; i < wpa_s->scan_res->num; i++) {
  339. const u8 *ssid_;
  340. u8 wpa_ie_len, rsn_ie_len, ssid_len;
  341. bss = wpa_s->scan_res->res[i];
  342. ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
  343. ssid_ = ie ? ie + 2 : (u8 *) "";
  344. ssid_len = ie ? ie[1] : 0;
  345. ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
  346. wpa_ie_len = ie ? ie[1] : 0;
  347. ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
  348. rsn_ie_len = ie ? ie[1] : 0;
  349. wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
  350. "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x",
  351. (int) i, MAC2STR(bss->bssid),
  352. wpa_ssid_txt(ssid_, ssid_len),
  353. wpa_ie_len, rsn_ie_len, bss->caps);
  354. e = wpa_blacklist_get(wpa_s, bss->bssid);
  355. if (e && e->count > 1) {
  356. wpa_printf(MSG_DEBUG, " skip - blacklisted");
  357. continue;
  358. }
  359. if (wpa_ie_len == 0 && rsn_ie_len == 0) {
  360. wpa_printf(MSG_DEBUG, " skip - no WPA/RSN IE");
  361. continue;
  362. }
  363. for (ssid = group; ssid; ssid = ssid->pnext) {
  364. int check_ssid = 1;
  365. if (ssid->disabled) {
  366. wpa_printf(MSG_DEBUG, " skip - disabled");
  367. continue;
  368. }
  369. #ifdef CONFIG_WPS
  370. if (ssid->ssid_len == 0 &&
  371. wpas_wps_ssid_wildcard_ok(wpa_s, ssid, bss))
  372. check_ssid = 0;
  373. #endif /* CONFIG_WPS */
  374. if (check_ssid &&
  375. (ssid_len != ssid->ssid_len ||
  376. os_memcmp(ssid_, ssid->ssid, ssid_len) != 0)) {
  377. wpa_printf(MSG_DEBUG, " skip - "
  378. "SSID mismatch");
  379. continue;
  380. }
  381. if (ssid->bssid_set &&
  382. os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0)
  383. {
  384. wpa_printf(MSG_DEBUG, " skip - "
  385. "BSSID mismatch");
  386. continue;
  387. }
  388. if (!wpa_supplicant_ssid_bss_match(wpa_s, ssid, bss))
  389. continue;
  390. wpa_printf(MSG_DEBUG, " selected WPA AP "
  391. MACSTR " ssid='%s'",
  392. MAC2STR(bss->bssid),
  393. wpa_ssid_txt(ssid_, ssid_len));
  394. *selected_ssid = ssid;
  395. return bss;
  396. }
  397. }
  398. return NULL;
  399. }
  400. static struct wpa_scan_res *
  401. wpa_supplicant_select_bss_non_wpa(struct wpa_supplicant *wpa_s,
  402. struct wpa_ssid *group,
  403. struct wpa_ssid **selected_ssid)
  404. {
  405. struct wpa_ssid *ssid;
  406. struct wpa_scan_res *bss;
  407. size_t i;
  408. struct wpa_blacklist *e;
  409. const u8 *ie;
  410. wpa_printf(MSG_DEBUG, "Try to find non-WPA AP");
  411. for (i = 0; i < wpa_s->scan_res->num; i++) {
  412. const u8 *ssid_;
  413. u8 wpa_ie_len, rsn_ie_len, ssid_len;
  414. bss = wpa_s->scan_res->res[i];
  415. ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
  416. ssid_ = ie ? ie + 2 : (u8 *) "";
  417. ssid_len = ie ? ie[1] : 0;
  418. ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
  419. wpa_ie_len = ie ? ie[1] : 0;
  420. ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
  421. rsn_ie_len = ie ? ie[1] : 0;
  422. wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
  423. "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x",
  424. (int) i, MAC2STR(bss->bssid),
  425. wpa_ssid_txt(ssid_, ssid_len),
  426. wpa_ie_len, rsn_ie_len, bss->caps);
  427. e = wpa_blacklist_get(wpa_s, bss->bssid);
  428. if (e && e->count > 1) {
  429. wpa_printf(MSG_DEBUG, " skip - blacklisted");
  430. continue;
  431. }
  432. for (ssid = group; ssid; ssid = ssid->pnext) {
  433. int check_ssid = ssid->ssid_len != 0;
  434. if (ssid->disabled) {
  435. wpa_printf(MSG_DEBUG, " skip - disabled");
  436. continue;
  437. }
  438. #ifdef CONFIG_WPS
  439. if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
  440. /* Only allow wildcard SSID match if an AP
  441. * advertises active WPS operation that matches
  442. * with our mode. */
  443. check_ssid = 1;
  444. if (ssid->ssid_len == 0 &&
  445. wpas_wps_ssid_wildcard_ok(wpa_s, ssid,
  446. bss))
  447. check_ssid = 0;
  448. }
  449. #endif /* CONFIG_WPS */
  450. if (check_ssid &&
  451. (ssid_len != ssid->ssid_len ||
  452. os_memcmp(ssid_, ssid->ssid, ssid_len) != 0)) {
  453. wpa_printf(MSG_DEBUG, " skip - "
  454. "SSID mismatch");
  455. continue;
  456. }
  457. if (ssid->bssid_set &&
  458. os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0)
  459. {
  460. wpa_printf(MSG_DEBUG, " skip - "
  461. "BSSID mismatch");
  462. continue;
  463. }
  464. if (!(ssid->key_mgmt & WPA_KEY_MGMT_NONE) &&
  465. !(ssid->key_mgmt & WPA_KEY_MGMT_WPS) &&
  466. !(ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA))
  467. {
  468. wpa_printf(MSG_DEBUG, " skip - "
  469. "non-WPA network not allowed");
  470. continue;
  471. }
  472. if ((ssid->key_mgmt &
  473. (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK |
  474. WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_FT_PSK |
  475. WPA_KEY_MGMT_IEEE8021X_SHA256 |
  476. WPA_KEY_MGMT_PSK_SHA256)) &&
  477. (wpa_ie_len != 0 || rsn_ie_len != 0)) {
  478. wpa_printf(MSG_DEBUG, " skip - "
  479. "WPA network");
  480. continue;
  481. }
  482. if (!wpa_supplicant_match_privacy(bss, ssid)) {
  483. wpa_printf(MSG_DEBUG, " skip - "
  484. "privacy mismatch");
  485. continue;
  486. }
  487. if (bss->caps & IEEE80211_CAP_IBSS) {
  488. wpa_printf(MSG_DEBUG, " skip - "
  489. "IBSS (adhoc) network");
  490. continue;
  491. }
  492. wpa_printf(MSG_DEBUG, " selected non-WPA AP "
  493. MACSTR " ssid='%s'",
  494. MAC2STR(bss->bssid),
  495. wpa_ssid_txt(ssid_, ssid_len));
  496. *selected_ssid = ssid;
  497. return bss;
  498. }
  499. }
  500. return NULL;
  501. }
  502. static struct wpa_scan_res *
  503. wpa_supplicant_select_bss(struct wpa_supplicant *wpa_s, struct wpa_ssid *group,
  504. struct wpa_ssid **selected_ssid)
  505. {
  506. struct wpa_scan_res *selected;
  507. wpa_printf(MSG_DEBUG, "Selecting BSS from priority group %d",
  508. group->priority);
  509. /* First, try to find WPA-enabled AP */
  510. selected = wpa_supplicant_select_bss_wpa(wpa_s, group, selected_ssid);
  511. if (selected)
  512. return selected;
  513. /* If no WPA-enabled AP found, try to find non-WPA AP, if configuration
  514. * allows this. */
  515. return wpa_supplicant_select_bss_non_wpa(wpa_s, group, selected_ssid);
  516. }
  517. static struct wpa_scan_res *
  518. wpa_supplicant_pick_network(struct wpa_supplicant *wpa_s,
  519. struct wpa_ssid **selected_ssid)
  520. {
  521. struct wpa_scan_res *selected = NULL;
  522. int prio;
  523. while (selected == NULL) {
  524. for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
  525. selected = wpa_supplicant_select_bss(
  526. wpa_s, wpa_s->conf->pssid[prio],
  527. selected_ssid);
  528. if (selected)
  529. break;
  530. }
  531. if (selected == NULL && wpa_s->blacklist) {
  532. wpa_printf(MSG_DEBUG, "No APs found - clear blacklist "
  533. "and try again");
  534. wpa_blacklist_clear(wpa_s);
  535. wpa_s->blacklist_cleared++;
  536. } else if (selected == NULL)
  537. break;
  538. }
  539. return selected;
  540. }
  541. static void wpa_supplicant_req_new_scan(struct wpa_supplicant *wpa_s,
  542. int timeout)
  543. {
  544. if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1) {
  545. /*
  546. * Quick recovery if the initial scan results were not
  547. * complete when fetched before the first scan request.
  548. */
  549. wpa_s->scan_res_tried++;
  550. timeout = 0;
  551. }
  552. wpa_supplicant_req_scan(wpa_s, timeout, 0);
  553. }
  554. static void wpa_supplicant_connect(struct wpa_supplicant *wpa_s,
  555. struct wpa_scan_res *selected,
  556. struct wpa_ssid *ssid)
  557. {
  558. if (wpas_wps_scan_pbc_overlap(wpa_s, selected, ssid)) {
  559. wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_OVERLAP
  560. "PBC session overlap");
  561. wpa_supplicant_req_new_scan(wpa_s, 10);
  562. return;
  563. }
  564. /*
  565. * Do not trigger new association unless the BSSID has changed or if
  566. * reassociation is requested. If we are in process of associating with
  567. * the selected BSSID, do not trigger new attempt.
  568. */
  569. if (wpa_s->reassociate ||
  570. (os_memcmp(selected->bssid, wpa_s->bssid, ETH_ALEN) != 0 &&
  571. (wpa_s->wpa_state != WPA_ASSOCIATING ||
  572. os_memcmp(selected->bssid, wpa_s->pending_bssid, ETH_ALEN) !=
  573. 0))) {
  574. if (wpa_supplicant_scard_init(wpa_s, ssid)) {
  575. wpa_supplicant_req_new_scan(wpa_s, 10);
  576. return;
  577. }
  578. wpa_supplicant_associate(wpa_s, selected, ssid);
  579. } else {
  580. wpa_printf(MSG_DEBUG, "Already associated with the selected "
  581. "AP");
  582. }
  583. rsn_preauth_scan_results(wpa_s->wpa, wpa_s->scan_res);
  584. }
  585. static struct wpa_ssid *
  586. wpa_supplicant_pick_new_network(struct wpa_supplicant *wpa_s)
  587. {
  588. int prio;
  589. struct wpa_ssid *ssid;
  590. for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
  591. for (ssid = wpa_s->conf->pssid[prio]; ssid; ssid = ssid->pnext)
  592. {
  593. if (ssid->disabled)
  594. continue;
  595. if (ssid->mode == IEEE80211_MODE_IBSS ||
  596. ssid->mode == IEEE80211_MODE_AP)
  597. return ssid;
  598. }
  599. }
  600. return NULL;
  601. }
  602. static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s)
  603. {
  604. struct wpa_scan_res *selected;
  605. struct wpa_ssid *ssid = NULL;
  606. wpa_supplicant_notify_scanning(wpa_s, 0);
  607. if (wpa_supplicant_get_scan_results(wpa_s) < 0) {
  608. if (wpa_s->conf->ap_scan == 2)
  609. return;
  610. wpa_printf(MSG_DEBUG, "Failed to get scan results - try "
  611. "scanning again");
  612. wpa_supplicant_req_new_scan(wpa_s, 1);
  613. return;
  614. }
  615. /*
  616. * Don't post the results if this was the initial cached
  617. * and there were no results.
  618. */
  619. if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1 &&
  620. wpa_s->scan_res->num == 0) {
  621. wpa_msg(wpa_s, MSG_DEBUG, "Cached scan results are "
  622. "empty - not posting");
  623. } else {
  624. wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
  625. wpas_notify_scan_results(wpa_s);
  626. }
  627. wpas_notify_scan_done(wpa_s, 1);
  628. if ((wpa_s->conf->ap_scan == 2 && !wpas_wps_searching(wpa_s)))
  629. return;
  630. if (wpa_s->disconnected) {
  631. wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
  632. return;
  633. }
  634. if (bgscan_notify_scan(wpa_s) == 1)
  635. return;
  636. selected = wpa_supplicant_pick_network(wpa_s, &ssid);
  637. if (selected) {
  638. wpa_supplicant_connect(wpa_s, selected, ssid);
  639. } else {
  640. wpa_printf(MSG_DEBUG, "No suitable network found");
  641. ssid = wpa_supplicant_pick_new_network(wpa_s);
  642. if (ssid) {
  643. wpa_printf(MSG_DEBUG, "Setup a new network");
  644. wpa_supplicant_associate(wpa_s, NULL, ssid);
  645. } else
  646. wpa_supplicant_req_new_scan(wpa_s, 5);
  647. }
  648. }
  649. #endif /* CONFIG_NO_SCAN_PROCESSING */
  650. #ifdef CONFIG_IEEE80211R
  651. static void wpa_assoc_set_ft_params(struct wpa_supplicant *wpa_s,
  652. const u8 *ftie, const u8 *mdie)
  653. {
  654. const u8 *mobility_domain = NULL;
  655. const u8 *r0kh_id = NULL;
  656. size_t r0kh_id_len = 0;
  657. const u8 *r1kh_id = NULL;
  658. struct rsn_ftie *hdr;
  659. const u8 *pos, *end;
  660. if (mdie == NULL || ftie == NULL)
  661. return;
  662. if (mdie[1] >= MOBILITY_DOMAIN_ID_LEN) {
  663. mobility_domain = mdie + 2;
  664. #ifdef CONFIG_SME
  665. wpa_s->sme.ft_used = 1;
  666. os_memcpy(wpa_s->sme.mobility_domain, mobility_domain, 2);
  667. #endif /* CONFIG_SME */
  668. }
  669. if (ftie[1] >= sizeof(struct rsn_ftie)) {
  670. end = ftie + 2 + ftie[1];
  671. hdr = (struct rsn_ftie *) (ftie + 2);
  672. pos = (const u8 *) (hdr + 1);
  673. while (pos + 1 < end) {
  674. if (pos + 2 + pos[1] > end)
  675. break;
  676. if (pos[0] == FTIE_SUBELEM_R1KH_ID &&
  677. pos[1] == FT_R1KH_ID_LEN)
  678. r1kh_id = pos + 2;
  679. else if (pos[0] == FTIE_SUBELEM_R0KH_ID &&
  680. pos[1] >= 1 && pos[1] <= FT_R0KH_ID_MAX_LEN) {
  681. r0kh_id = pos + 2;
  682. r0kh_id_len = pos[1];
  683. }
  684. pos += 2 + pos[1];
  685. }
  686. }
  687. wpa_sm_set_ft_params(wpa_s->wpa, mobility_domain, r0kh_id,
  688. r0kh_id_len, r1kh_id);
  689. }
  690. #endif /* CONFIG_IEEE80211R */
  691. static void wpa_supplicant_event_associnfo(struct wpa_supplicant *wpa_s,
  692. union wpa_event_data *data)
  693. {
  694. int l, len, found = 0, wpa_found, rsn_found;
  695. const u8 *p;
  696. #ifdef CONFIG_IEEE80211R
  697. const u8 *mdie = NULL, *ftie = NULL;
  698. #endif /* CONFIG_IEEE80211R */
  699. wpa_printf(MSG_DEBUG, "Association info event");
  700. if (data->assoc_info.req_ies)
  701. wpa_hexdump(MSG_DEBUG, "req_ies", data->assoc_info.req_ies,
  702. data->assoc_info.req_ies_len);
  703. if (data->assoc_info.resp_ies)
  704. wpa_hexdump(MSG_DEBUG, "resp_ies", data->assoc_info.resp_ies,
  705. data->assoc_info.resp_ies_len);
  706. if (data->assoc_info.beacon_ies)
  707. wpa_hexdump(MSG_DEBUG, "beacon_ies",
  708. data->assoc_info.beacon_ies,
  709. data->assoc_info.beacon_ies_len);
  710. p = data->assoc_info.req_ies;
  711. l = data->assoc_info.req_ies_len;
  712. /* Go through the IEs and make a copy of the WPA/RSN IE, if present. */
  713. while (p && l >= 2) {
  714. len = p[1] + 2;
  715. if (len > l) {
  716. wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
  717. p, l);
  718. break;
  719. }
  720. if ((p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
  721. (os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0)) ||
  722. (p[0] == WLAN_EID_RSN && p[1] >= 2)) {
  723. if (wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, p, len))
  724. break;
  725. found = 1;
  726. wpa_find_assoc_pmkid(wpa_s);
  727. break;
  728. }
  729. l -= len;
  730. p += len;
  731. }
  732. if (!found && data->assoc_info.req_ies)
  733. wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
  734. #ifdef CONFIG_IEEE80211R
  735. p = data->assoc_info.resp_ies;
  736. l = data->assoc_info.resp_ies_len;
  737. /* Go through the IEs and make a copy of the FT/MD IE, if present. */
  738. while (p && l >= 2) {
  739. len = p[1] + 2;
  740. if (len > l) {
  741. wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
  742. p, l);
  743. break;
  744. }
  745. if (p[0] == WLAN_EID_FAST_BSS_TRANSITION)
  746. ftie = p;
  747. else if (p[0] == WLAN_EID_MOBILITY_DOMAIN)
  748. mdie = p;
  749. l -= len;
  750. p += len;
  751. }
  752. wpa_assoc_set_ft_params(wpa_s, ftie, mdie);
  753. #endif /* CONFIG_IEEE80211R */
  754. /* WPA/RSN IE from Beacon/ProbeResp */
  755. p = data->assoc_info.beacon_ies;
  756. l = data->assoc_info.beacon_ies_len;
  757. /* Go through the IEs and make a copy of the WPA/RSN IEs, if present.
  758. */
  759. wpa_found = rsn_found = 0;
  760. while (p && l >= 2) {
  761. len = p[1] + 2;
  762. if (len > l) {
  763. wpa_hexdump(MSG_DEBUG, "Truncated IE in beacon_ies",
  764. p, l);
  765. break;
  766. }
  767. if (!wpa_found &&
  768. p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
  769. os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0) {
  770. wpa_found = 1;
  771. wpa_sm_set_ap_wpa_ie(wpa_s->wpa, p, len);
  772. }
  773. if (!rsn_found &&
  774. p[0] == WLAN_EID_RSN && p[1] >= 2) {
  775. rsn_found = 1;
  776. wpa_sm_set_ap_rsn_ie(wpa_s->wpa, p, len);
  777. }
  778. l -= len;
  779. p += len;
  780. }
  781. if (!wpa_found && data->assoc_info.beacon_ies)
  782. wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0);
  783. if (!rsn_found && data->assoc_info.beacon_ies)
  784. wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0);
  785. if (wpa_found || rsn_found)
  786. wpa_s->ap_ies_from_associnfo = 1;
  787. }
  788. static void wpa_supplicant_event_assoc(struct wpa_supplicant *wpa_s,
  789. union wpa_event_data *data)
  790. {
  791. u8 bssid[ETH_ALEN];
  792. int ft_completed = wpa_ft_is_completed(wpa_s->wpa);
  793. int bssid_changed;
  794. struct wpa_driver_capa capa;
  795. if (data)
  796. wpa_supplicant_event_associnfo(wpa_s, data);
  797. wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATED);
  798. if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
  799. os_memcpy(bssid, wpa_s->bssid, ETH_ALEN);
  800. if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) ||
  801. (wpa_drv_get_bssid(wpa_s, bssid) >= 0 &&
  802. os_memcmp(bssid, wpa_s->bssid, ETH_ALEN) != 0)) {
  803. wpa_msg(wpa_s, MSG_DEBUG, "Associated to a new BSS: BSSID="
  804. MACSTR, MAC2STR(bssid));
  805. bssid_changed = os_memcmp(wpa_s->bssid, bssid, ETH_ALEN);
  806. os_memcpy(wpa_s->bssid, bssid, ETH_ALEN);
  807. os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
  808. if (bssid_changed)
  809. wpas_notify_bssid_changed(wpa_s);
  810. if (wpa_supplicant_dynamic_keys(wpa_s) && !ft_completed) {
  811. wpa_clear_keys(wpa_s, bssid);
  812. }
  813. if (wpa_supplicant_select_config(wpa_s) < 0) {
  814. wpa_supplicant_disassociate(
  815. wpa_s, WLAN_REASON_DEAUTH_LEAVING);
  816. return;
  817. }
  818. }
  819. wpa_msg(wpa_s, MSG_INFO, "Associated with " MACSTR, MAC2STR(bssid));
  820. if (wpa_s->current_ssid) {
  821. /* When using scanning (ap_scan=1), SIM PC/SC interface can be
  822. * initialized before association, but for other modes,
  823. * initialize PC/SC here, if the current configuration needs
  824. * smartcard or SIM/USIM. */
  825. wpa_supplicant_scard_init(wpa_s, wpa_s->current_ssid);
  826. }
  827. wpa_sm_notify_assoc(wpa_s->wpa, bssid);
  828. l2_packet_notify_auth_start(wpa_s->l2);
  829. /*
  830. * Set portEnabled first to FALSE in order to get EAP state machine out
  831. * of the SUCCESS state and eapSuccess cleared. Without this, EAPOL PAE
  832. * state machine may transit to AUTHENTICATING state based on obsolete
  833. * eapSuccess and then trigger BE_AUTH to SUCCESS and PAE to
  834. * AUTHENTICATED without ever giving chance to EAP state machine to
  835. * reset the state.
  836. */
  837. if (!ft_completed) {
  838. eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
  839. eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
  840. }
  841. if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) || ft_completed)
  842. eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
  843. /* 802.1X::portControl = Auto */
  844. eapol_sm_notify_portEnabled(wpa_s->eapol, TRUE);
  845. wpa_s->eapol_received = 0;
  846. if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
  847. wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
  848. wpa_supplicant_cancel_auth_timeout(wpa_s);
  849. wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
  850. } else if (!ft_completed) {
  851. /* Timeout for receiving the first EAPOL packet */
  852. wpa_supplicant_req_auth_timeout(wpa_s, 10, 0);
  853. }
  854. wpa_supplicant_cancel_scan(wpa_s);
  855. if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) &&
  856. wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
  857. /*
  858. * We are done; the driver will take care of RSN 4-way
  859. * handshake.
  860. */
  861. wpa_supplicant_cancel_auth_timeout(wpa_s);
  862. wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
  863. eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
  864. eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
  865. }
  866. if (wpa_s->pending_eapol_rx) {
  867. struct os_time now, age;
  868. os_get_time(&now);
  869. os_time_sub(&now, &wpa_s->pending_eapol_rx_time, &age);
  870. if (age.sec == 0 && age.usec < 100000 &&
  871. os_memcmp(wpa_s->pending_eapol_rx_src, bssid, ETH_ALEN) ==
  872. 0) {
  873. wpa_printf(MSG_DEBUG, "Process pending EAPOL frame "
  874. "that was received just before association "
  875. "notification");
  876. wpa_supplicant_rx_eapol(
  877. wpa_s, wpa_s->pending_eapol_rx_src,
  878. wpabuf_head(wpa_s->pending_eapol_rx),
  879. wpabuf_len(wpa_s->pending_eapol_rx));
  880. }
  881. wpabuf_free(wpa_s->pending_eapol_rx);
  882. wpa_s->pending_eapol_rx = NULL;
  883. }
  884. #ifdef CONFIG_BGSCAN
  885. if (wpa_s->current_ssid != wpa_s->bgscan_ssid) {
  886. bgscan_deinit(wpa_s);
  887. if (wpa_s->current_ssid && wpa_s->current_ssid->bgscan) {
  888. if (bgscan_init(wpa_s, wpa_s->current_ssid)) {
  889. wpa_printf(MSG_DEBUG, "Failed to initialize "
  890. "bgscan");
  891. /*
  892. * Live without bgscan; it is only used as a
  893. * roaming optimization, so the initial
  894. * connection is not affected.
  895. */
  896. } else
  897. wpa_s->bgscan_ssid = wpa_s->current_ssid;
  898. } else
  899. wpa_s->bgscan_ssid = NULL;
  900. }
  901. #endif /* CONFIG_BGSCAN */
  902. if ((wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
  903. wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
  904. wpa_s->current_ssid && wpa_drv_get_capa(wpa_s, &capa) == 0 &&
  905. capa.flags & WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE) {
  906. /* Set static WEP keys again */
  907. wpa_set_wep_keys(wpa_s, wpa_s->current_ssid);
  908. }
  909. }
  910. static void wpa_supplicant_event_disassoc(struct wpa_supplicant *wpa_s)
  911. {
  912. const u8 *bssid;
  913. if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
  914. /*
  915. * At least Host AP driver and a Prism3 card seemed to be
  916. * generating streams of disconnected events when configuring
  917. * IBSS for WPA-None. Ignore them for now.
  918. */
  919. wpa_printf(MSG_DEBUG, "Disconnect event - ignore in "
  920. "IBSS/WPA-None mode");
  921. return;
  922. }
  923. if (wpa_s->wpa_state == WPA_4WAY_HANDSHAKE &&
  924. wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
  925. wpa_msg(wpa_s, MSG_INFO, "WPA: 4-Way Handshake failed - "
  926. "pre-shared key may be incorrect");
  927. }
  928. if (wpa_s->wpa_state >= WPA_ASSOCIATED)
  929. wpa_supplicant_req_scan(wpa_s, 0, 100000);
  930. bssid = wpa_s->bssid;
  931. if (is_zero_ether_addr(bssid))
  932. bssid = wpa_s->pending_bssid;
  933. wpa_blacklist_add(wpa_s, bssid);
  934. wpa_sm_notify_disassoc(wpa_s->wpa);
  935. wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "- Disconnect event - "
  936. "remove keys");
  937. if (wpa_supplicant_dynamic_keys(wpa_s)) {
  938. wpa_s->keys_cleared = 0;
  939. wpa_clear_keys(wpa_s, wpa_s->bssid);
  940. }
  941. wpa_supplicant_mark_disassoc(wpa_s);
  942. bgscan_deinit(wpa_s);
  943. }
  944. #ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
  945. static void wpa_supplicant_delayed_mic_error_report(void *eloop_ctx,
  946. void *sock_ctx)
  947. {
  948. struct wpa_supplicant *wpa_s = eloop_ctx;
  949. if (!wpa_s->pending_mic_error_report)
  950. return;
  951. wpa_printf(MSG_DEBUG, "WPA: Sending pending MIC error report");
  952. wpa_sm_key_request(wpa_s->wpa, 1, wpa_s->pending_mic_error_pairwise);
  953. wpa_s->pending_mic_error_report = 0;
  954. }
  955. #endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
  956. static void
  957. wpa_supplicant_event_michael_mic_failure(struct wpa_supplicant *wpa_s,
  958. union wpa_event_data *data)
  959. {
  960. int pairwise;
  961. struct os_time t;
  962. wpa_msg(wpa_s, MSG_WARNING, "Michael MIC failure detected");
  963. pairwise = (data && data->michael_mic_failure.unicast);
  964. os_get_time(&t);
  965. if ((wpa_s->last_michael_mic_error &&
  966. t.sec - wpa_s->last_michael_mic_error <= 60) ||
  967. wpa_s->pending_mic_error_report) {
  968. if (wpa_s->pending_mic_error_report) {
  969. /*
  970. * Send the pending MIC error report immediately since
  971. * we are going to start countermeasures and AP better
  972. * do the same.
  973. */
  974. wpa_sm_key_request(wpa_s->wpa, 1,
  975. wpa_s->pending_mic_error_pairwise);
  976. }
  977. /* Send the new MIC error report immediately since we are going
  978. * to start countermeasures and AP better do the same.
  979. */
  980. wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
  981. /* initialize countermeasures */
  982. wpa_s->countermeasures = 1;
  983. wpa_msg(wpa_s, MSG_WARNING, "TKIP countermeasures started");
  984. /*
  985. * Need to wait for completion of request frame. We do not get
  986. * any callback for the message completion, so just wait a
  987. * short while and hope for the best. */
  988. os_sleep(0, 10000);
  989. wpa_drv_set_countermeasures(wpa_s, 1);
  990. wpa_supplicant_deauthenticate(wpa_s,
  991. WLAN_REASON_MICHAEL_MIC_FAILURE);
  992. eloop_cancel_timeout(wpa_supplicant_stop_countermeasures,
  993. wpa_s, NULL);
  994. eloop_register_timeout(60, 0,
  995. wpa_supplicant_stop_countermeasures,
  996. wpa_s, NULL);
  997. /* TODO: mark the AP rejected for 60 second. STA is
  998. * allowed to associate with another AP.. */
  999. } else {
  1000. #ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
  1001. if (wpa_s->mic_errors_seen) {
  1002. /*
  1003. * Reduce the effectiveness of Michael MIC error
  1004. * reports as a means for attacking against TKIP if
  1005. * more than one MIC failure is noticed with the same
  1006. * PTK. We delay the transmission of the reports by a
  1007. * random time between 0 and 60 seconds in order to
  1008. * force the attacker wait 60 seconds before getting
  1009. * the information on whether a frame resulted in a MIC
  1010. * failure.
  1011. */
  1012. u8 rval[4];
  1013. int sec;
  1014. if (os_get_random(rval, sizeof(rval)) < 0)
  1015. sec = os_random() % 60;
  1016. else
  1017. sec = WPA_GET_BE32(rval) % 60;
  1018. wpa_printf(MSG_DEBUG, "WPA: Delay MIC error report %d "
  1019. "seconds", sec);
  1020. wpa_s->pending_mic_error_report = 1;
  1021. wpa_s->pending_mic_error_pairwise = pairwise;
  1022. eloop_cancel_timeout(
  1023. wpa_supplicant_delayed_mic_error_report,
  1024. wpa_s, NULL);
  1025. eloop_register_timeout(
  1026. sec, os_random() % 1000000,
  1027. wpa_supplicant_delayed_mic_error_report,
  1028. wpa_s, NULL);
  1029. } else {
  1030. wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
  1031. }
  1032. #else /* CONFIG_DELAYED_MIC_ERROR_REPORT */
  1033. wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
  1034. #endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
  1035. }
  1036. wpa_s->last_michael_mic_error = t.sec;
  1037. wpa_s->mic_errors_seen++;
  1038. }
  1039. #ifdef CONFIG_TERMINATE_ONLASTIF
  1040. static int any_interfaces(struct wpa_supplicant *head)
  1041. {
  1042. struct wpa_supplicant *wpa_s;
  1043. for (wpa_s = head; wpa_s != NULL; wpa_s = wpa_s->next)
  1044. if (!wpa_s->interface_removed)
  1045. return 1;
  1046. return 0;
  1047. }
  1048. #endif /* CONFIG_TERMINATE_ONLASTIF */
  1049. static void
  1050. wpa_supplicant_event_interface_status(struct wpa_supplicant *wpa_s,
  1051. union wpa_event_data *data)
  1052. {
  1053. if (os_strcmp(wpa_s->ifname, data->interface_status.ifname) != 0)
  1054. return;
  1055. switch (data->interface_status.ievent) {
  1056. case EVENT_INTERFACE_ADDED:
  1057. if (!wpa_s->interface_removed)
  1058. break;
  1059. wpa_s->interface_removed = 0;
  1060. wpa_printf(MSG_DEBUG, "Configured interface was added.");
  1061. if (wpa_supplicant_driver_init(wpa_s) < 0) {
  1062. wpa_printf(MSG_INFO, "Failed to initialize the driver "
  1063. "after interface was added.");
  1064. }
  1065. break;
  1066. case EVENT_INTERFACE_REMOVED:
  1067. wpa_printf(MSG_DEBUG, "Configured interface was removed.");
  1068. wpa_s->interface_removed = 1;
  1069. wpa_supplicant_mark_disassoc(wpa_s);
  1070. l2_packet_deinit(wpa_s->l2);
  1071. wpa_s->l2 = NULL;
  1072. #ifdef CONFIG_TERMINATE_ONLASTIF
  1073. /* check if last interface */
  1074. if (!any_interfaces(wpa_s->global->ifaces))
  1075. eloop_terminate();
  1076. #endif /* CONFIG_TERMINATE_ONLASTIF */
  1077. break;
  1078. }
  1079. }
  1080. #ifdef CONFIG_PEERKEY
  1081. static void
  1082. wpa_supplicant_event_stkstart(struct wpa_supplicant *wpa_s,
  1083. union wpa_event_data *data)
  1084. {
  1085. if (data == NULL)
  1086. return;
  1087. wpa_sm_stkstart(wpa_s->wpa, data->stkstart.peer);
  1088. }
  1089. #endif /* CONFIG_PEERKEY */
  1090. #ifdef CONFIG_IEEE80211R
  1091. static void
  1092. wpa_supplicant_event_ft_response(struct wpa_supplicant *wpa_s,
  1093. union wpa_event_data *data)
  1094. {
  1095. if (data == NULL)
  1096. return;
  1097. if (wpa_ft_process_response(wpa_s->wpa, data->ft_ies.ies,
  1098. data->ft_ies.ies_len,
  1099. data->ft_ies.ft_action,
  1100. data->ft_ies.target_ap,
  1101. data->ft_ies.ric_ies,
  1102. data->ft_ies.ric_ies_len) < 0) {
  1103. /* TODO: prevent MLME/driver from trying to associate? */
  1104. }
  1105. }
  1106. #endif /* CONFIG_IEEE80211R */
  1107. #ifdef CONFIG_IBSS_RSN
  1108. static void wpa_supplicant_event_ibss_rsn_start(struct wpa_supplicant *wpa_s,
  1109. union wpa_event_data *data)
  1110. {
  1111. if (data == NULL)
  1112. return;
  1113. ibss_rsn_start(wpa_s->ibss_rsn, data->ibss_rsn_start.peer);
  1114. }
  1115. #endif /* CONFIG_IBSS_RSN */
  1116. void wpa_supplicant_event(void *ctx, wpa_event_type event,
  1117. union wpa_event_data *data)
  1118. {
  1119. struct wpa_supplicant *wpa_s = ctx;
  1120. switch (event) {
  1121. case EVENT_AUTH:
  1122. sme_event_auth(wpa_s, data);
  1123. break;
  1124. case EVENT_ASSOC:
  1125. wpa_supplicant_event_assoc(wpa_s, data);
  1126. break;
  1127. case EVENT_DEAUTH:
  1128. case EVENT_DISASSOC:
  1129. wpa_supplicant_event_disassoc(wpa_s);
  1130. break;
  1131. case EVENT_MICHAEL_MIC_FAILURE:
  1132. wpa_supplicant_event_michael_mic_failure(wpa_s, data);
  1133. break;
  1134. #ifndef CONFIG_NO_SCAN_PROCESSING
  1135. case EVENT_SCAN_RESULTS:
  1136. wpa_supplicant_event_scan_results(wpa_s);
  1137. break;
  1138. #endif /* CONFIG_NO_SCAN_PROCESSING */
  1139. case EVENT_ASSOCINFO:
  1140. wpa_supplicant_event_associnfo(wpa_s, data);
  1141. break;
  1142. case EVENT_INTERFACE_STATUS:
  1143. wpa_supplicant_event_interface_status(wpa_s, data);
  1144. break;
  1145. case EVENT_PMKID_CANDIDATE:
  1146. wpa_supplicant_event_pmkid_candidate(wpa_s, data);
  1147. break;
  1148. #ifdef CONFIG_PEERKEY
  1149. case EVENT_STKSTART:
  1150. wpa_supplicant_event_stkstart(wpa_s, data);
  1151. break;
  1152. #endif /* CONFIG_PEERKEY */
  1153. #ifdef CONFIG_IEEE80211R
  1154. case EVENT_FT_RESPONSE:
  1155. wpa_supplicant_event_ft_response(wpa_s, data);
  1156. break;
  1157. #endif /* CONFIG_IEEE80211R */
  1158. #ifdef CONFIG_IBSS_RSN
  1159. case EVENT_IBSS_RSN_START:
  1160. wpa_supplicant_event_ibss_rsn_start(wpa_s, data);
  1161. break;
  1162. #endif /* CONFIG_IBSS_RSN */
  1163. case EVENT_ASSOC_REJECT:
  1164. sme_event_assoc_reject(wpa_s, data);
  1165. break;
  1166. case EVENT_AUTH_TIMED_OUT:
  1167. sme_event_auth_timed_out(wpa_s, data);
  1168. break;
  1169. case EVENT_ASSOC_TIMED_OUT:
  1170. sme_event_assoc_timed_out(wpa_s, data);
  1171. break;
  1172. default:
  1173. wpa_printf(MSG_INFO, "Unknown event %d", event);
  1174. break;
  1175. }
  1176. }