sme.c revision 04949598a23f501be6eec21697465fd46a28840a
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 34static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx); 35static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx); 36static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx); 37#ifdef CONFIG_IEEE80211W 38static void sme_stop_sa_query(struct wpa_supplicant *wpa_s); 39#endif /* CONFIG_IEEE80211W */ 40 41 42void 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(¶ms, 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 (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) { 131 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie); 132 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid, 133 wpa_s->sme.assoc_req_ie, 134 &wpa_s->sme.assoc_req_ie_len)) { 135 wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA " 136 "key management and encryption suites (no " 137 "scan results)"); 138 return; 139 } 140#ifdef CONFIG_WPS 141 } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) { 142 struct wpabuf *wps_ie; 143 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid)); 144 if (wps_ie && wpabuf_len(wps_ie) <= 145 sizeof(wpa_s->sme.assoc_req_ie)) { 146 wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie); 147 os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie), 148 wpa_s->sme.assoc_req_ie_len); 149 } else 150 wpa_s->sme.assoc_req_ie_len = 0; 151 wpabuf_free(wps_ie); 152 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid); 153#endif /* CONFIG_WPS */ 154 } else { 155 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid); 156 wpa_s->sme.assoc_req_ie_len = 0; 157 } 158 159#ifdef CONFIG_IEEE80211R 160 ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN); 161 if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN) 162 md = ie + 2; 163 wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0); 164 if (md) { 165 /* Prepare for the next transition */ 166 wpa_ft_prepare_auth_request(wpa_s->wpa, ie); 167 } 168 169 if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) { 170 if (wpa_s->sme.assoc_req_ie_len + 5 < 171 sizeof(wpa_s->sme.assoc_req_ie)) { 172 struct rsn_mdie *mdie; 173 u8 *pos = wpa_s->sme.assoc_req_ie + 174 wpa_s->sme.assoc_req_ie_len; 175 *pos++ = WLAN_EID_MOBILITY_DOMAIN; 176 *pos++ = sizeof(*mdie); 177 mdie = (struct rsn_mdie *) pos; 178 os_memcpy(mdie->mobility_domain, md, 179 MOBILITY_DOMAIN_ID_LEN); 180 mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN]; 181 wpa_s->sme.assoc_req_ie_len += 5; 182 } 183 184 if (wpa_s->sme.ft_used && 185 os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 && 186 wpa_sm_has_ptk(wpa_s->wpa)) { 187 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT " 188 "over-the-air"); 189 params.auth_alg = WPA_AUTH_ALG_FT; 190 params.ie = wpa_s->sme.ft_ies; 191 params.ie_len = wpa_s->sme.ft_ies_len; 192 } 193 } 194#endif /* CONFIG_IEEE80211R */ 195 196#ifdef CONFIG_IEEE80211W 197 wpa_s->sme.mfp = ssid->ieee80211w; 198 if (ssid->ieee80211w != NO_MGMT_FRAME_PROTECTION) { 199 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN); 200 struct wpa_ie_data _ie; 201 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 && 202 _ie.capabilities & 203 (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) { 204 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports " 205 "MFP: require MFP"); 206 wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED; 207 } 208 } 209#endif /* CONFIG_IEEE80211W */ 210 211#ifdef CONFIG_P2P 212 if (wpa_s->global->p2p) { 213 u8 *pos; 214 size_t len; 215 int res; 216 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len; 217 len = sizeof(wpa_s->sme.assoc_req_ie) - 218 wpa_s->sme.assoc_req_ie_len; 219 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len, 220 ssid->p2p_group); 221 if (res >= 0) 222 wpa_s->sme.assoc_req_ie_len += res; 223 } 224#endif /* CONFIG_P2P */ 225 226#ifdef CONFIG_HS20 227 if (wpa_s->conf->hs20) { 228 struct wpabuf *hs20; 229 hs20 = wpabuf_alloc(20); 230 if (hs20) { 231 wpas_hs20_add_indication(hs20); 232 os_memcpy(wpa_s->sme.assoc_req_ie + 233 wpa_s->sme.assoc_req_ie_len, 234 wpabuf_head(hs20), wpabuf_len(hs20)); 235 wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20); 236 wpabuf_free(hs20); 237 } 238 } 239#endif /* CONFIG_HS20 */ 240 241#ifdef CONFIG_INTERWORKING 242 if (wpa_s->conf->interworking) { 243 u8 *pos = wpa_s->sme.assoc_req_ie; 244 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN) 245 pos += 2 + pos[1]; 246 os_memmove(pos + 6, pos, 247 wpa_s->sme.assoc_req_ie_len - 248 (pos - wpa_s->sme.assoc_req_ie)); 249 wpa_s->sme.assoc_req_ie_len += 6; 250 *pos++ = WLAN_EID_EXT_CAPAB; 251 *pos++ = 4; 252 *pos++ = 0x00; 253 *pos++ = 0x00; 254 *pos++ = 0x00; 255 *pos++ = 0x80; /* Bit 31 - Interworking */ 256 } 257#endif /* CONFIG_INTERWORKING */ 258 259 wpa_supplicant_cancel_sched_scan(wpa_s); 260 wpa_supplicant_cancel_scan(wpa_s); 261 262 wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR 263 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid), 264 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq); 265 266 wpa_clear_keys(wpa_s, bss->bssid); 267 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING); 268 old_ssid = wpa_s->current_ssid; 269 wpa_s->current_ssid = ssid; 270 wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid); 271 wpa_supplicant_initiate_eapol(wpa_s); 272 if (old_ssid != wpa_s->current_ssid) 273 wpas_notify_network_changed(wpa_s); 274 275 wpa_s->sme.auth_alg = params.auth_alg; 276 if (wpa_drv_authenticate(wpa_s, ¶ms) < 0) { 277 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the " 278 "driver failed"); 279 wpas_connection_failed(wpa_s, bss->bssid); 280 wpa_supplicant_mark_disassoc(wpa_s); 281 return; 282 } 283 284 eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s, 285 NULL); 286 287 /* 288 * Association will be started based on the authentication event from 289 * the driver. 290 */ 291} 292 293 294void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data) 295{ 296 struct wpa_ssid *ssid = wpa_s->current_ssid; 297 298 if (ssid == NULL) { 299 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event " 300 "when network is not selected"); 301 return; 302 } 303 304 if (wpa_s->wpa_state != WPA_AUTHENTICATING) { 305 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event " 306 "when not in authenticating state"); 307 return; 308 } 309 310 if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) { 311 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with " 312 "unexpected peer " MACSTR, 313 MAC2STR(data->auth.peer)); 314 return; 315 } 316 317 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR 318 " auth_type=%d status_code=%d", 319 MAC2STR(data->auth.peer), data->auth.auth_type, 320 data->auth.status_code); 321 wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs", 322 data->auth.ies, data->auth.ies_len); 323 324 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL); 325 326 if (data->auth.status_code != WLAN_STATUS_SUCCESS) { 327 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status " 328 "code %d)", data->auth.status_code); 329 330 if (data->auth.status_code != 331 WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG || 332 wpa_s->sme.auth_alg == data->auth.auth_type || 333 wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) { 334 wpas_connection_failed(wpa_s, wpa_s->pending_bssid); 335 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); 336 return; 337 } 338 339 switch (data->auth.auth_type) { 340 case WLAN_AUTH_OPEN: 341 wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED; 342 343 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth"); 344 wpa_supplicant_associate(wpa_s, wpa_s->current_bss, 345 wpa_s->current_ssid); 346 return; 347 348 case WLAN_AUTH_SHARED_KEY: 349 wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP; 350 351 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth"); 352 wpa_supplicant_associate(wpa_s, wpa_s->current_bss, 353 wpa_s->current_ssid); 354 return; 355 356 default: 357 return; 358 } 359 } 360 361#ifdef CONFIG_IEEE80211R 362 if (data->auth.auth_type == WLAN_AUTH_FT) { 363 union wpa_event_data edata; 364 os_memset(&edata, 0, sizeof(edata)); 365 edata.ft_ies.ies = data->auth.ies; 366 edata.ft_ies.ies_len = data->auth.ies_len; 367 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN); 368 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata); 369 } 370#endif /* CONFIG_IEEE80211R */ 371 372 sme_associate(wpa_s, ssid->mode, data->auth.peer, 373 data->auth.auth_type); 374} 375 376 377void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode, 378 const u8 *bssid, u16 auth_type) 379{ 380 struct wpa_driver_associate_params params; 381 struct ieee802_11_elems elems; 382#ifdef CONFIG_HT_OVERRIDES 383 struct ieee80211_ht_capabilities htcaps; 384 struct ieee80211_ht_capabilities htcaps_mask; 385#endif /* CONFIG_HT_OVERRIDES */ 386 387 os_memset(¶ms, 0, sizeof(params)); 388 params.bssid = bssid; 389 params.ssid = wpa_s->sme.ssid; 390 params.ssid_len = wpa_s->sme.ssid_len; 391 params.freq = wpa_s->sme.freq; 392 params.bg_scan_period = wpa_s->current_ssid ? 393 wpa_s->current_ssid->bg_scan_period : -1; 394 params.wpa_ie = wpa_s->sme.assoc_req_ie_len ? 395 wpa_s->sme.assoc_req_ie : NULL; 396 params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len; 397 params.pairwise_suite = cipher_suite2driver(wpa_s->pairwise_cipher); 398 params.group_suite = cipher_suite2driver(wpa_s->group_cipher); 399#ifdef CONFIG_HT_OVERRIDES 400 os_memset(&htcaps, 0, sizeof(htcaps)); 401 os_memset(&htcaps_mask, 0, sizeof(htcaps_mask)); 402 params.htcaps = (u8 *) &htcaps; 403 params.htcaps_mask = (u8 *) &htcaps_mask; 404 wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, ¶ms); 405#endif /* CONFIG_HT_OVERRIDES */ 406#ifdef CONFIG_IEEE80211R 407 if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) { 408 params.wpa_ie = wpa_s->sme.ft_ies; 409 params.wpa_ie_len = wpa_s->sme.ft_ies_len; 410 } 411#endif /* CONFIG_IEEE80211R */ 412 params.mode = mode; 413 params.mgmt_frame_protection = wpa_s->sme.mfp; 414 if (wpa_s->sme.prev_bssid_set) 415 params.prev_bssid = wpa_s->sme.prev_bssid; 416 417 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR 418 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid), 419 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "", 420 params.freq); 421 422 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING); 423 424 if (params.wpa_ie == NULL || 425 ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0) 426 < 0) { 427 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!"); 428 os_memset(&elems, 0, sizeof(elems)); 429 } 430 if (elems.rsn_ie) { 431 params.wpa_proto = WPA_PROTO_RSN; 432 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2, 433 elems.rsn_ie_len + 2); 434 } else if (elems.wpa_ie) { 435 params.wpa_proto = WPA_PROTO_WPA; 436 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2, 437 elems.wpa_ie_len + 2); 438 } else 439 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0); 440 if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group) 441 params.p2p = 1; 442 443 if (wpa_s->parent->set_sta_uapsd) 444 params.uapsd = wpa_s->parent->sta_uapsd; 445 else 446 params.uapsd = -1; 447 448 if (wpa_drv_associate(wpa_s, ¶ms) < 0) { 449 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the " 450 "driver failed"); 451 wpas_connection_failed(wpa_s, wpa_s->pending_bssid); 452 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); 453 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN); 454 return; 455 } 456 457 eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s, 458 NULL); 459} 460 461 462int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md, 463 const u8 *ies, size_t ies_len) 464{ 465 if (md == NULL || ies == NULL) { 466 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain"); 467 os_free(wpa_s->sme.ft_ies); 468 wpa_s->sme.ft_ies = NULL; 469 wpa_s->sme.ft_ies_len = 0; 470 wpa_s->sme.ft_used = 0; 471 return 0; 472 } 473 474 os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN); 475 wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len); 476 os_free(wpa_s->sme.ft_ies); 477 wpa_s->sme.ft_ies = os_malloc(ies_len); 478 if (wpa_s->sme.ft_ies == NULL) 479 return -1; 480 os_memcpy(wpa_s->sme.ft_ies, ies, ies_len); 481 wpa_s->sme.ft_ies_len = ies_len; 482 return 0; 483} 484 485 486static void sme_deauth(struct wpa_supplicant *wpa_s) 487{ 488 int bssid_changed; 489 490 bssid_changed = !is_zero_ether_addr(wpa_s->bssid); 491 492 if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid, 493 WLAN_REASON_DEAUTH_LEAVING) < 0) { 494 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver " 495 "failed"); 496 } 497 wpa_s->sme.prev_bssid_set = 0; 498 499 wpas_connection_failed(wpa_s, wpa_s->pending_bssid); 500 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); 501 os_memset(wpa_s->bssid, 0, ETH_ALEN); 502 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN); 503 if (bssid_changed) 504 wpas_notify_bssid_changed(wpa_s); 505} 506 507 508void sme_event_assoc_reject(struct wpa_supplicant *wpa_s, 509 union wpa_event_data *data) 510{ 511 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: " 512 "status code %d", MAC2STR(wpa_s->pending_bssid), 513 data->assoc_reject.status_code); 514 515 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL); 516 517 /* 518 * For now, unconditionally terminate the previous authentication. In 519 * theory, this should not be needed, but mac80211 gets quite confused 520 * if the authentication is left pending.. Some roaming cases might 521 * benefit from using the previous authentication, so this could be 522 * optimized in the future. 523 */ 524 sme_deauth(wpa_s); 525} 526 527 528void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s, 529 union wpa_event_data *data) 530{ 531 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out"); 532 wpas_connection_failed(wpa_s, wpa_s->pending_bssid); 533 wpa_supplicant_mark_disassoc(wpa_s); 534} 535 536 537void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s, 538 union wpa_event_data *data) 539{ 540 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out"); 541 wpas_connection_failed(wpa_s, wpa_s->pending_bssid); 542 wpa_supplicant_mark_disassoc(wpa_s); 543} 544 545 546void sme_event_disassoc(struct wpa_supplicant *wpa_s, 547 union wpa_event_data *data) 548{ 549 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received"); 550 if (wpa_s->sme.prev_bssid_set) { 551 /* 552 * cfg80211/mac80211 can get into somewhat confused state if 553 * the AP only disassociates us and leaves us in authenticated 554 * state. For now, force the state to be cleared to avoid 555 * confusing errors if we try to associate with the AP again. 556 */ 557 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear " 558 "driver state"); 559 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid, 560 WLAN_REASON_DEAUTH_LEAVING); 561 } 562} 563 564 565static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx) 566{ 567 struct wpa_supplicant *wpa_s = eloop_ctx; 568 if (wpa_s->wpa_state == WPA_AUTHENTICATING) { 569 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout"); 570 sme_deauth(wpa_s); 571 } 572} 573 574 575static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx) 576{ 577 struct wpa_supplicant *wpa_s = eloop_ctx; 578 if (wpa_s->wpa_state == WPA_ASSOCIATING) { 579 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout"); 580 sme_deauth(wpa_s); 581 } 582} 583 584 585void sme_state_changed(struct wpa_supplicant *wpa_s) 586{ 587 /* Make sure timers are cleaned up appropriately. */ 588 if (wpa_s->wpa_state != WPA_ASSOCIATING) 589 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL); 590 if (wpa_s->wpa_state != WPA_AUTHENTICATING) 591 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL); 592} 593 594 595void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s, 596 const u8 *prev_pending_bssid) 597{ 598 /* 599 * mac80211-workaround to force deauth on failed auth cmd, 600 * requires us to remain in authenticating state to allow the 601 * second authentication attempt to be continued properly. 602 */ 603 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication " 604 "to proceed after disconnection event"); 605 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING); 606 os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN); 607 608 /* 609 * Re-arm authentication timer in case auth fails for whatever reason. 610 */ 611 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL); 612 eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s, 613 NULL); 614} 615 616 617void sme_deinit(struct wpa_supplicant *wpa_s) 618{ 619 os_free(wpa_s->sme.ft_ies); 620 wpa_s->sme.ft_ies = NULL; 621 wpa_s->sme.ft_ies_len = 0; 622#ifdef CONFIG_IEEE80211W 623 sme_stop_sa_query(wpa_s); 624#endif /* CONFIG_IEEE80211W */ 625 626 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL); 627 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL); 628 eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL); 629} 630 631 632static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s, 633 const u8 *chan_list, u8 num_channels, 634 u8 num_intol) 635{ 636 struct ieee80211_2040_bss_coex_ie *bc_ie; 637 struct ieee80211_2040_intol_chan_report *ic_report; 638 struct wpabuf *buf; 639 640 wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR, 641 MAC2STR(wpa_s->bssid)); 642 643 buf = wpabuf_alloc(2 + /* action.category + action_code */ 644 sizeof(struct ieee80211_2040_bss_coex_ie) + 645 sizeof(struct ieee80211_2040_intol_chan_report) + 646 num_channels); 647 if (buf == NULL) 648 return; 649 650 wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC); 651 wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX); 652 653 bc_ie = wpabuf_put(buf, sizeof(*bc_ie)); 654 bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE; 655 bc_ie->length = 1; 656 if (num_intol) 657 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ; 658 659 if (num_channels > 0) { 660 ic_report = wpabuf_put(buf, sizeof(*ic_report)); 661 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT; 662 ic_report->length = num_channels + 1; 663 ic_report->op_class = 0; 664 os_memcpy(wpabuf_put(buf, num_channels), chan_list, 665 num_channels); 666 } 667 668 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid, 669 wpa_s->own_addr, wpa_s->bssid, 670 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) { 671 wpa_msg(wpa_s, MSG_INFO, 672 "SME: Failed to send 20/40 BSS Coexistence frame"); 673 } 674 675 wpabuf_free(buf); 676} 677 678 679/** 680 * enum wpas_band - Frequency band 681 * @WPAS_BAND_2GHZ: 2.4 GHz ISM band 682 * @WPAS_BAND_5GHZ: around 5 GHz band (4.9 - 5.7 GHz) 683 */ 684enum wpas_band { 685 WPAS_BAND_2GHZ, 686 WPAS_BAND_5GHZ, 687 WPAS_BAND_INVALID 688}; 689 690/** 691 * freq_to_channel - Convert frequency into channel info 692 * @channel: Buffer for returning channel number 693 * Returns: Band (2 or 5 GHz) 694 */ 695static enum wpas_band freq_to_channel(int freq, u8 *channel) 696{ 697 enum wpas_band band = (freq <= 2484) ? WPAS_BAND_2GHZ : WPAS_BAND_5GHZ; 698 u8 chan = 0; 699 700 if (freq >= 2412 && freq <= 2472) 701 chan = (freq - 2407) / 5; 702 else if (freq == 2484) 703 chan = 14; 704 else if (freq >= 5180 && freq <= 5805) 705 chan = (freq - 5000) / 5; 706 707 *channel = chan; 708 return band; 709} 710 711 712int sme_proc_obss_scan(struct wpa_supplicant *wpa_s) 713{ 714 struct wpa_bss *bss; 715 const u8 *ie; 716 u16 ht_cap; 717 u8 chan_list[P2P_MAX_CHANNELS], channel; 718 u8 num_channels = 0, num_intol = 0, i; 719 720 if (!wpa_s->sme.sched_obss_scan) 721 return 0; 722 723 wpa_s->sme.sched_obss_scan = 0; 724 if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED) 725 return 1; 726 727 /* 728 * Check whether AP uses regulatory triplet or channel triplet in 729 * country info. Right now the operating class of the BSS channel 730 * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12), 731 * based on the assumption that operating class triplet is not used in 732 * beacon frame. If the First Channel Number/Operating Extension 733 * Identifier octet has a positive integer value of 201 or greater, 734 * then its operating class triplet. 735 * 736 * TODO: If Supported Operating Classes element is present in beacon 737 * frame, have to lookup operating class in Annex E and fill them in 738 * 2040 coex frame. 739 */ 740 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY); 741 if (ie && (ie[1] >= 6) && (ie[5] >= 201)) 742 return 1; 743 744 os_memset(chan_list, 0, sizeof(chan_list)); 745 746 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) { 747 /* Skip other band bss */ 748 if (freq_to_channel(bss->freq, &channel) != WPAS_BAND_2GHZ) 749 continue; 750 751 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP); 752 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0; 753 754 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) { 755 /* Check whether the channel is already considered */ 756 for (i = 0; i < num_channels; i++) { 757 if (channel == chan_list[i]) 758 break; 759 } 760 if (i != num_channels) 761 continue; 762 763 if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT) 764 num_intol++; 765 766 chan_list[num_channels++] = channel; 767 } 768 } 769 770 sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol); 771 return 1; 772} 773 774 775static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes, 776 u16 num_modes, 777 enum hostapd_hw_mode mode) 778{ 779 u16 i; 780 781 for (i = 0; i < num_modes; i++) { 782 if (modes[i].mode == mode) 783 return &modes[i]; 784 } 785 786 return NULL; 787} 788 789 790static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s, 791 enum hostapd_hw_mode band, 792 struct wpa_driver_scan_params *params) 793{ 794 /* Include only supported channels for the specified band */ 795 struct hostapd_hw_modes *mode; 796 int count, i; 797 798 mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band); 799 if (mode == NULL) { 800 /* No channels supported in this band - use empty list */ 801 params->freqs = os_zalloc(sizeof(int)); 802 return; 803 } 804 805 params->freqs = os_zalloc((mode->num_channels + 1) * sizeof(int)); 806 if (params->freqs == NULL) 807 return; 808 for (count = 0, i = 0; i < mode->num_channels; i++) { 809 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED) 810 continue; 811 params->freqs[count++] = mode->channels[i].freq; 812 } 813} 814 815 816static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx) 817{ 818 struct wpa_supplicant *wpa_s = eloop_ctx; 819 struct wpa_driver_scan_params params; 820 821 if (!wpa_s->current_bss) { 822 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request"); 823 return; 824 } 825 826 os_memset(¶ms, 0, sizeof(params)); 827 wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G, ¶ms); 828 wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan"); 829 830 if (wpa_supplicant_trigger_scan(wpa_s, ¶ms)) 831 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan"); 832 else 833 wpa_s->sme.sched_obss_scan = 1; 834 os_free(params.freqs); 835 836 eloop_register_timeout(wpa_s->sme.obss_scan_int, 0, 837 sme_obss_scan_timeout, wpa_s, NULL); 838} 839 840 841void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable) 842{ 843 const u8 *ie; 844 struct wpa_bss *bss = wpa_s->current_bss; 845 struct wpa_ssid *ssid = wpa_s->current_ssid; 846 847 eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL); 848 wpa_s->sme.sched_obss_scan = 0; 849 if (!enable) 850 return; 851 852 if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) || ssid == NULL || 853 ssid->mode != IEEE80211_MODE_INFRA) 854 return; /* Not using station SME in wpa_supplicant */ 855 856 if (!wpa_s->hw.modes || 857 !(wpa_s->hw.modes->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET)) 858 return; /* Driver does not support HT40 */ 859 860 if (bss == NULL || bss->freq < 2400 || bss->freq > 2500) 861 return; /* Not associated on 2.4 GHz band */ 862 863 /* Check whether AP supports HT40 */ 864 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP); 865 if (!ie || ie[1] < 2 || 866 !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET)) 867 return; /* AP does not support HT40 */ 868 869 ie = wpa_bss_get_ie(wpa_s->current_bss, 870 WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS); 871 if (!ie || ie[1] < 14) 872 return; /* AP does not request OBSS scans */ 873 874 wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6); 875 if (wpa_s->sme.obss_scan_int < 10) { 876 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u " 877 "replaced with the minimum 10 sec", 878 wpa_s->sme.obss_scan_int); 879 wpa_s->sme.obss_scan_int = 10; 880 } 881 wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec", 882 wpa_s->sme.obss_scan_int); 883 eloop_register_timeout(wpa_s->sme.obss_scan_int, 0, 884 sme_obss_scan_timeout, wpa_s, NULL); 885} 886 887 888#ifdef CONFIG_IEEE80211W 889 890static const unsigned int sa_query_max_timeout = 1000; 891static const unsigned int sa_query_retry_timeout = 201; 892 893static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s) 894{ 895 u32 tu; 896 struct os_time now, passed; 897 os_get_time(&now); 898 os_time_sub(&now, &wpa_s->sme.sa_query_start, &passed); 899 tu = (passed.sec * 1000000 + passed.usec) / 1024; 900 if (sa_query_max_timeout < tu) { 901 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out"); 902 sme_stop_sa_query(wpa_s); 903 wpa_supplicant_deauthenticate( 904 wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID); 905 return 1; 906 } 907 908 return 0; 909} 910 911 912static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s, 913 const u8 *trans_id) 914{ 915 u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN]; 916 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to " 917 MACSTR, MAC2STR(wpa_s->bssid)); 918 wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID", 919 trans_id, WLAN_SA_QUERY_TR_ID_LEN); 920 req[0] = WLAN_ACTION_SA_QUERY; 921 req[1] = WLAN_SA_QUERY_REQUEST; 922 os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN); 923 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid, 924 wpa_s->own_addr, wpa_s->bssid, 925 req, sizeof(req), 0) < 0) 926 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query " 927 "Request"); 928} 929 930 931static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx) 932{ 933 struct wpa_supplicant *wpa_s = eloop_ctx; 934 unsigned int timeout, sec, usec; 935 u8 *trans_id, *nbuf; 936 937 if (wpa_s->sme.sa_query_count > 0 && 938 sme_check_sa_query_timeout(wpa_s)) 939 return; 940 941 nbuf = os_realloc(wpa_s->sme.sa_query_trans_id, 942 (wpa_s->sme.sa_query_count + 1) * 943 WLAN_SA_QUERY_TR_ID_LEN); 944 if (nbuf == NULL) 945 return; 946 if (wpa_s->sme.sa_query_count == 0) { 947 /* Starting a new SA Query procedure */ 948 os_get_time(&wpa_s->sme.sa_query_start); 949 } 950 trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN; 951 wpa_s->sme.sa_query_trans_id = nbuf; 952 wpa_s->sme.sa_query_count++; 953 954 os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN); 955 956 timeout = sa_query_retry_timeout; 957 sec = ((timeout / 1000) * 1024) / 1000; 958 usec = (timeout % 1000) * 1024; 959 eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL); 960 961 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d", 962 wpa_s->sme.sa_query_count); 963 964 sme_send_sa_query_req(wpa_s, trans_id); 965} 966 967 968static void sme_start_sa_query(struct wpa_supplicant *wpa_s) 969{ 970 sme_sa_query_timer(wpa_s, NULL); 971} 972 973 974static void sme_stop_sa_query(struct wpa_supplicant *wpa_s) 975{ 976 eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL); 977 os_free(wpa_s->sme.sa_query_trans_id); 978 wpa_s->sme.sa_query_trans_id = NULL; 979 wpa_s->sme.sa_query_count = 0; 980} 981 982 983void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa, 984 const u8 *da, u16 reason_code) 985{ 986 struct wpa_ssid *ssid; 987 988 if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)) 989 return; 990 if (wpa_s->wpa_state != WPA_COMPLETED) 991 return; 992 ssid = wpa_s->current_ssid; 993 if (ssid == NULL || ssid->ieee80211w == 0) 994 return; 995 if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) 996 return; 997 if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA && 998 reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA) 999 return; 1000 if (wpa_s->sme.sa_query_count > 0) 1001 return; 1002 1003 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - " 1004 "possible AP/STA state mismatch - trigger SA Query"); 1005 sme_start_sa_query(wpa_s); 1006} 1007 1008 1009void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa, 1010 const u8 *data, size_t len) 1011{ 1012 int i; 1013 1014 if (wpa_s->sme.sa_query_trans_id == NULL || 1015 len < 1 + WLAN_SA_QUERY_TR_ID_LEN || 1016 data[0] != WLAN_SA_QUERY_RESPONSE) 1017 return; 1018 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from " 1019 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]); 1020 1021 if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) 1022 return; 1023 1024 for (i = 0; i < wpa_s->sme.sa_query_count; i++) { 1025 if (os_memcmp(wpa_s->sme.sa_query_trans_id + 1026 i * WLAN_SA_QUERY_TR_ID_LEN, 1027 data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0) 1028 break; 1029 } 1030 1031 if (i >= wpa_s->sme.sa_query_count) { 1032 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query " 1033 "transaction identifier found"); 1034 return; 1035 } 1036 1037 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received " 1038 "from " MACSTR, MAC2STR(sa)); 1039 sme_stop_sa_query(wpa_s); 1040} 1041 1042#endif /* CONFIG_IEEE80211W */ 1043