sme.c revision 6c0da2bb83f6915d8260912362692d1a742e057b
1/* 2 * wpa_supplicant - SME 3 * Copyright (c) 2009-2014, Jouni Malinen <j@w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9#include "includes.h" 10 11#include "common.h" 12#include "utils/eloop.h" 13#include "common/ieee802_11_defs.h" 14#include "common/ieee802_11_common.h" 15#include "eapol_supp/eapol_supp_sm.h" 16#include "common/wpa_common.h" 17#include "common/sae.h" 18#include "rsn_supp/wpa.h" 19#include "rsn_supp/pmksa_cache.h" 20#include "config.h" 21#include "wpa_supplicant_i.h" 22#include "driver_i.h" 23#include "wpas_glue.h" 24#include "wps_supplicant.h" 25#include "p2p_supplicant.h" 26#include "notify.h" 27#include "bss.h" 28#include "scan.h" 29#include "sme.h" 30#include "hs20_supplicant.h" 31 32#define SME_AUTH_TIMEOUT 5 33#define SME_ASSOC_TIMEOUT 5 34 35static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx); 36static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx); 37static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx); 38#ifdef CONFIG_IEEE80211W 39static void sme_stop_sa_query(struct wpa_supplicant *wpa_s); 40#endif /* CONFIG_IEEE80211W */ 41 42 43#ifdef CONFIG_SAE 44 45static int index_within_array(const int *array, int idx) 46{ 47 int i; 48 for (i = 0; i < idx; i++) { 49 if (array[i] <= 0) 50 return 0; 51 } 52 return 1; 53} 54 55 56static int sme_set_sae_group(struct wpa_supplicant *wpa_s) 57{ 58 int *groups = wpa_s->conf->sae_groups; 59 int default_groups[] = { 19, 20, 21, 25, 26, 0 }; 60 61 if (!groups || groups[0] <= 0) 62 groups = default_groups; 63 64 /* Configuration may have changed, so validate current index */ 65 if (!index_within_array(groups, wpa_s->sme.sae_group_index)) 66 return -1; 67 68 for (;;) { 69 int group = groups[wpa_s->sme.sae_group_index]; 70 if (group < 0) 71 break; 72 if (sae_set_group(&wpa_s->sme.sae, group) == 0) { 73 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected SAE group %d", 74 wpa_s->sme.sae.group); 75 return 0; 76 } 77 wpa_s->sme.sae_group_index++; 78 } 79 80 return -1; 81} 82 83 84static struct wpabuf * sme_auth_build_sae_commit(struct wpa_supplicant *wpa_s, 85 struct wpa_ssid *ssid, 86 const u8 *bssid) 87{ 88 struct wpabuf *buf; 89 size_t len; 90 91 if (ssid->passphrase == NULL) { 92 wpa_printf(MSG_DEBUG, "SAE: No password available"); 93 return NULL; 94 } 95 96 if (sme_set_sae_group(wpa_s) < 0) { 97 wpa_printf(MSG_DEBUG, "SAE: Failed to select group"); 98 return NULL; 99 } 100 101 if (sae_prepare_commit(wpa_s->own_addr, bssid, 102 (u8 *) ssid->passphrase, 103 os_strlen(ssid->passphrase), 104 &wpa_s->sme.sae) < 0) { 105 wpa_printf(MSG_DEBUG, "SAE: Could not pick PWE"); 106 return NULL; 107 } 108 109 len = wpa_s->sme.sae_token ? wpabuf_len(wpa_s->sme.sae_token) : 0; 110 buf = wpabuf_alloc(4 + SAE_COMMIT_MAX_LEN + len); 111 if (buf == NULL) 112 return NULL; 113 114 wpabuf_put_le16(buf, 1); /* Transaction seq# */ 115 wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS); 116 sae_write_commit(&wpa_s->sme.sae, buf, wpa_s->sme.sae_token); 117 118 return buf; 119} 120 121 122static struct wpabuf * sme_auth_build_sae_confirm(struct wpa_supplicant *wpa_s) 123{ 124 struct wpabuf *buf; 125 126 buf = wpabuf_alloc(4 + SAE_CONFIRM_MAX_LEN); 127 if (buf == NULL) 128 return NULL; 129 130 wpabuf_put_le16(buf, 2); /* Transaction seq# */ 131 wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS); 132 sae_write_confirm(&wpa_s->sme.sae, buf); 133 134 return buf; 135} 136 137#endif /* CONFIG_SAE */ 138 139 140/** 141 * sme_auth_handle_rrm - Handle RRM aspects of current authentication attempt 142 * @wpa_s: Pointer to wpa_supplicant data 143 * @bss: Pointer to the bss which is the target of authentication attempt 144 */ 145static void sme_auth_handle_rrm(struct wpa_supplicant *wpa_s, 146 struct wpa_bss *bss) 147{ 148 const u8 rrm_ie_len = 5; 149 u8 *pos; 150 const u8 *rrm_ie; 151 152 wpa_s->rrm.rrm_used = 0; 153 154 wpa_printf(MSG_DEBUG, 155 "RRM: Determining whether RRM can be used - device support: 0x%x", 156 wpa_s->drv_rrm_flags); 157 158 rrm_ie = wpa_bss_get_ie(bss, WLAN_EID_RRM_ENABLED_CAPABILITIES); 159 if (!rrm_ie || !(bss->caps & IEEE80211_CAP_RRM)) { 160 wpa_printf(MSG_DEBUG, "RRM: No RRM in network"); 161 return; 162 } 163 164 if (!(wpa_s->drv_rrm_flags & 165 WPA_DRIVER_FLAGS_DS_PARAM_SET_IE_IN_PROBES) || 166 !(wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_QUIET)) { 167 wpa_printf(MSG_DEBUG, 168 "RRM: Insufficient RRM support in driver - do not use RRM"); 169 return; 170 } 171 172 if (sizeof(wpa_s->sme.assoc_req_ie) < 173 wpa_s->sme.assoc_req_ie_len + rrm_ie_len + 2) { 174 wpa_printf(MSG_INFO, 175 "RRM: Unable to use RRM, no room for RRM IE"); 176 return; 177 } 178 179 wpa_printf(MSG_DEBUG, "RRM: Adding RRM IE to Association Request"); 180 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len; 181 os_memset(pos, 0, 2 + rrm_ie_len); 182 *pos++ = WLAN_EID_RRM_ENABLED_CAPABILITIES; 183 *pos++ = rrm_ie_len; 184 185 /* Set supported capabilites flags */ 186 if (wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_TX_POWER_INSERTION) 187 *pos |= WLAN_RRM_CAPS_LINK_MEASUREMENT; 188 189 wpa_s->sme.assoc_req_ie_len += rrm_ie_len + 2; 190 wpa_s->rrm.rrm_used = 1; 191} 192 193 194static void sme_send_authentication(struct wpa_supplicant *wpa_s, 195 struct wpa_bss *bss, struct wpa_ssid *ssid, 196 int start) 197{ 198 struct wpa_driver_auth_params params; 199 struct wpa_ssid *old_ssid; 200#ifdef CONFIG_IEEE80211R 201 const u8 *ie; 202#endif /* CONFIG_IEEE80211R */ 203#ifdef CONFIG_IEEE80211R 204 const u8 *md = NULL; 205#endif /* CONFIG_IEEE80211R */ 206 int i, bssid_changed; 207 struct wpabuf *resp = NULL; 208 u8 ext_capab[18]; 209 int ext_capab_len; 210 211 if (bss == NULL) { 212 wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for " 213 "the network"); 214 wpas_connect_work_done(wpa_s); 215 return; 216 } 217 218 wpa_s->current_bss = bss; 219 220 os_memset(¶ms, 0, sizeof(params)); 221 wpa_s->reassociate = 0; 222 223 params.freq = bss->freq; 224 params.bssid = bss->bssid; 225 params.ssid = bss->ssid; 226 params.ssid_len = bss->ssid_len; 227 params.p2p = ssid->p2p_group; 228 229 if (wpa_s->sme.ssid_len != params.ssid_len || 230 os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0) 231 wpa_s->sme.prev_bssid_set = 0; 232 233 wpa_s->sme.freq = params.freq; 234 os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len); 235 wpa_s->sme.ssid_len = params.ssid_len; 236 237 params.auth_alg = WPA_AUTH_ALG_OPEN; 238#ifdef IEEE8021X_EAPOL 239 if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) { 240 if (ssid->leap) { 241 if (ssid->non_leap == 0) 242 params.auth_alg = WPA_AUTH_ALG_LEAP; 243 else 244 params.auth_alg |= WPA_AUTH_ALG_LEAP; 245 } 246 } 247#endif /* IEEE8021X_EAPOL */ 248 wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x", 249 params.auth_alg); 250 if (ssid->auth_alg) { 251 params.auth_alg = ssid->auth_alg; 252 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: " 253 "0x%x", params.auth_alg); 254 } 255#ifdef CONFIG_SAE 256 wpa_s->sme.sae_pmksa_caching = 0; 257 if (wpa_key_mgmt_sae(ssid->key_mgmt)) { 258 const u8 *rsn; 259 struct wpa_ie_data ied; 260 261 rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN); 262 if (!rsn) { 263 wpa_dbg(wpa_s, MSG_DEBUG, 264 "SAE enabled, but target BSS does not advertise RSN"); 265 } else if (wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0 && 266 wpa_key_mgmt_sae(ied.key_mgmt)) { 267 wpa_dbg(wpa_s, MSG_DEBUG, "Using SAE auth_alg"); 268 params.auth_alg = WPA_AUTH_ALG_SAE; 269 } else { 270 wpa_dbg(wpa_s, MSG_DEBUG, 271 "SAE enabled, but target BSS does not advertise SAE AKM for RSN"); 272 } 273 } 274#endif /* CONFIG_SAE */ 275 276 for (i = 0; i < NUM_WEP_KEYS; i++) { 277 if (ssid->wep_key_len[i]) 278 params.wep_key[i] = ssid->wep_key[i]; 279 params.wep_key_len[i] = ssid->wep_key_len[i]; 280 } 281 params.wep_tx_keyidx = ssid->wep_tx_keyidx; 282 283 bssid_changed = !is_zero_ether_addr(wpa_s->bssid); 284 os_memset(wpa_s->bssid, 0, ETH_ALEN); 285 os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN); 286 if (bssid_changed) 287 wpas_notify_bssid_changed(wpa_s); 288 289 if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) || 290 wpa_bss_get_ie(bss, WLAN_EID_RSN)) && 291 wpa_key_mgmt_wpa(ssid->key_mgmt)) { 292 int try_opportunistic; 293 try_opportunistic = (ssid->proactive_key_caching < 0 ? 294 wpa_s->conf->okc : 295 ssid->proactive_key_caching) && 296 (ssid->proto & WPA_PROTO_RSN); 297 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid, 298 wpa_s->current_ssid, 299 try_opportunistic) == 0) 300 eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1); 301 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie); 302 if (wpa_supplicant_set_suites(wpa_s, bss, ssid, 303 wpa_s->sme.assoc_req_ie, 304 &wpa_s->sme.assoc_req_ie_len)) { 305 wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA " 306 "key management and encryption suites"); 307 wpas_connect_work_done(wpa_s); 308 return; 309 } 310 } else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) && 311 wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) { 312 /* 313 * Both WPA and non-WPA IEEE 802.1X enabled in configuration - 314 * use non-WPA since the scan results did not indicate that the 315 * AP is using WPA or WPA2. 316 */ 317 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid); 318 wpa_s->sme.assoc_req_ie_len = 0; 319 } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) { 320 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie); 321 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid, 322 wpa_s->sme.assoc_req_ie, 323 &wpa_s->sme.assoc_req_ie_len)) { 324 wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA " 325 "key management and encryption suites (no " 326 "scan results)"); 327 wpas_connect_work_done(wpa_s); 328 return; 329 } 330#ifdef CONFIG_WPS 331 } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) { 332 struct wpabuf *wps_ie; 333 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid)); 334 if (wps_ie && wpabuf_len(wps_ie) <= 335 sizeof(wpa_s->sme.assoc_req_ie)) { 336 wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie); 337 os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie), 338 wpa_s->sme.assoc_req_ie_len); 339 } else 340 wpa_s->sme.assoc_req_ie_len = 0; 341 wpabuf_free(wps_ie); 342 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid); 343#endif /* CONFIG_WPS */ 344 } else { 345 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid); 346 wpa_s->sme.assoc_req_ie_len = 0; 347 } 348 349#ifdef CONFIG_IEEE80211R 350 ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN); 351 if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN) 352 md = ie + 2; 353 wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0); 354 if (md) { 355 /* Prepare for the next transition */ 356 wpa_ft_prepare_auth_request(wpa_s->wpa, ie); 357 } 358 359 if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) { 360 if (wpa_s->sme.assoc_req_ie_len + 5 < 361 sizeof(wpa_s->sme.assoc_req_ie)) { 362 struct rsn_mdie *mdie; 363 u8 *pos = wpa_s->sme.assoc_req_ie + 364 wpa_s->sme.assoc_req_ie_len; 365 *pos++ = WLAN_EID_MOBILITY_DOMAIN; 366 *pos++ = sizeof(*mdie); 367 mdie = (struct rsn_mdie *) pos; 368 os_memcpy(mdie->mobility_domain, md, 369 MOBILITY_DOMAIN_ID_LEN); 370 mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN]; 371 wpa_s->sme.assoc_req_ie_len += 5; 372 } 373 374 if (wpa_s->sme.ft_used && 375 os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 && 376 wpa_sm_has_ptk(wpa_s->wpa)) { 377 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT " 378 "over-the-air"); 379 params.auth_alg = WPA_AUTH_ALG_FT; 380 params.ie = wpa_s->sme.ft_ies; 381 params.ie_len = wpa_s->sme.ft_ies_len; 382 } 383 } 384#endif /* CONFIG_IEEE80211R */ 385 386#ifdef CONFIG_IEEE80211W 387 wpa_s->sme.mfp = ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ? 388 wpa_s->conf->pmf : ssid->ieee80211w; 389 if (wpa_s->sme.mfp != NO_MGMT_FRAME_PROTECTION) { 390 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN); 391 struct wpa_ie_data _ie; 392 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 && 393 _ie.capabilities & 394 (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) { 395 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports " 396 "MFP: require MFP"); 397 wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED; 398 } 399 } 400#endif /* CONFIG_IEEE80211W */ 401 402#ifdef CONFIG_P2P 403 if (wpa_s->global->p2p) { 404 u8 *pos; 405 size_t len; 406 int res; 407 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len; 408 len = sizeof(wpa_s->sme.assoc_req_ie) - 409 wpa_s->sme.assoc_req_ie_len; 410 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len, 411 ssid->p2p_group); 412 if (res >= 0) 413 wpa_s->sme.assoc_req_ie_len += res; 414 } 415#endif /* CONFIG_P2P */ 416 417#ifdef CONFIG_HS20 418 if (is_hs20_network(wpa_s, ssid, bss)) { 419 struct wpabuf *hs20; 420 hs20 = wpabuf_alloc(20); 421 if (hs20) { 422 int pps_mo_id = hs20_get_pps_mo_id(wpa_s, ssid); 423 size_t len; 424 425 wpas_hs20_add_indication(hs20, pps_mo_id); 426 len = sizeof(wpa_s->sme.assoc_req_ie) - 427 wpa_s->sme.assoc_req_ie_len; 428 if (wpabuf_len(hs20) <= len) { 429 os_memcpy(wpa_s->sme.assoc_req_ie + 430 wpa_s->sme.assoc_req_ie_len, 431 wpabuf_head(hs20), wpabuf_len(hs20)); 432 wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20); 433 } 434 wpabuf_free(hs20); 435 } 436 } 437#endif /* CONFIG_HS20 */ 438 439 ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab, 440 sizeof(ext_capab)); 441 if (ext_capab_len > 0) { 442 u8 *pos = wpa_s->sme.assoc_req_ie; 443 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN) 444 pos += 2 + pos[1]; 445 os_memmove(pos + ext_capab_len, pos, 446 wpa_s->sme.assoc_req_ie_len - 447 (pos - wpa_s->sme.assoc_req_ie)); 448 wpa_s->sme.assoc_req_ie_len += ext_capab_len; 449 os_memcpy(pos, ext_capab, ext_capab_len); 450 } 451 452 sme_auth_handle_rrm(wpa_s, bss); 453 454#ifdef CONFIG_SAE 455 if (params.auth_alg == WPA_AUTH_ALG_SAE && 456 pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid, ssid, 0) == 0) 457 { 458 wpa_dbg(wpa_s, MSG_DEBUG, 459 "PMKSA cache entry found - try to use PMKSA caching instead of new SAE authentication"); 460 params.auth_alg = WPA_AUTH_ALG_OPEN; 461 wpa_s->sme.sae_pmksa_caching = 1; 462 } 463 464 if (params.auth_alg == WPA_AUTH_ALG_SAE) { 465 if (start) 466 resp = sme_auth_build_sae_commit(wpa_s, ssid, 467 bss->bssid); 468 else 469 resp = sme_auth_build_sae_confirm(wpa_s); 470 if (resp == NULL) { 471 wpas_connection_failed(wpa_s, bss->bssid); 472 return; 473 } 474 params.sae_data = wpabuf_head(resp); 475 params.sae_data_len = wpabuf_len(resp); 476 wpa_s->sme.sae.state = start ? SAE_COMMITTED : SAE_CONFIRMED; 477 } 478#endif /* CONFIG_SAE */ 479 480 wpa_supplicant_cancel_sched_scan(wpa_s); 481 wpa_supplicant_cancel_scan(wpa_s); 482 483 wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR 484 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid), 485 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq); 486 487 wpa_clear_keys(wpa_s, bss->bssid); 488 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING); 489 old_ssid = wpa_s->current_ssid; 490 wpa_s->current_ssid = ssid; 491 wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid); 492 wpa_supplicant_initiate_eapol(wpa_s); 493 if (old_ssid != wpa_s->current_ssid) 494 wpas_notify_network_changed(wpa_s); 495 496#ifdef CONFIG_P2P 497 /* 498 * If multi-channel concurrency is not supported, check for any 499 * frequency conflict. In case of any frequency conflict, remove the 500 * least prioritized connection. 501 */ 502 if (wpa_s->num_multichan_concurrent < 2) { 503 int freq, num; 504 num = get_shared_radio_freqs(wpa_s, &freq, 1); 505 if (num > 0 && freq > 0 && freq != params.freq) { 506 wpa_printf(MSG_DEBUG, 507 "Conflicting frequency found (%d != %d)", 508 freq, params.freq); 509 if (wpas_p2p_handle_frequency_conflicts(wpa_s, 510 params.freq, 511 ssid) < 0) { 512 wpas_connection_failed(wpa_s, bss->bssid); 513 wpa_supplicant_mark_disassoc(wpa_s); 514 wpabuf_free(resp); 515 wpas_connect_work_done(wpa_s); 516 return; 517 } 518 } 519 } 520#endif /* CONFIG_P2P */ 521 522 wpa_s->sme.auth_alg = params.auth_alg; 523 if (wpa_drv_authenticate(wpa_s, ¶ms) < 0) { 524 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the " 525 "driver failed"); 526 wpas_connection_failed(wpa_s, bss->bssid); 527 wpa_supplicant_mark_disassoc(wpa_s); 528 wpabuf_free(resp); 529 wpas_connect_work_done(wpa_s); 530 return; 531 } 532 533 eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s, 534 NULL); 535 536 /* 537 * Association will be started based on the authentication event from 538 * the driver. 539 */ 540 541 wpabuf_free(resp); 542} 543 544 545static void sme_auth_start_cb(struct wpa_radio_work *work, int deinit) 546{ 547 struct wpa_connect_work *cwork = work->ctx; 548 struct wpa_supplicant *wpa_s = work->wpa_s; 549 550 if (deinit) { 551 if (work->started) 552 wpa_s->connect_work = NULL; 553 554 wpas_connect_work_free(cwork); 555 return; 556 } 557 558 wpa_s->connect_work = work; 559 560 if (cwork->bss_removed || 561 !wpas_valid_bss_ssid(wpa_s, cwork->bss, cwork->ssid)) { 562 wpa_dbg(wpa_s, MSG_DEBUG, "SME: BSS/SSID entry for authentication not valid anymore - drop connection attempt"); 563 wpas_connect_work_done(wpa_s); 564 return; 565 } 566 567 sme_send_authentication(wpa_s, cwork->bss, cwork->ssid, 1); 568} 569 570 571void sme_authenticate(struct wpa_supplicant *wpa_s, 572 struct wpa_bss *bss, struct wpa_ssid *ssid) 573{ 574 struct wpa_connect_work *cwork; 575 576 if (bss == NULL || ssid == NULL) 577 return; 578 if (wpa_s->connect_work) { 579 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reject sme_authenticate() call since connect_work exist"); 580 return; 581 } 582 583 if (radio_work_pending(wpa_s, "sme-connect")) { 584 /* 585 * The previous sme-connect work might no longer be valid due to 586 * the fact that the BSS list was updated. In addition, it makes 587 * sense to adhere to the 'newer' decision. 588 */ 589 wpa_dbg(wpa_s, MSG_DEBUG, 590 "SME: Remove previous pending sme-connect"); 591 radio_remove_works(wpa_s, "sme-connect", 0); 592 } 593 594 cwork = os_zalloc(sizeof(*cwork)); 595 if (cwork == NULL) 596 return; 597 cwork->bss = bss; 598 cwork->ssid = ssid; 599 cwork->sme = 1; 600 601#ifdef CONFIG_SAE 602 wpa_s->sme.sae.state = SAE_NOTHING; 603 wpa_s->sme.sae.send_confirm = 0; 604 wpa_s->sme.sae_group_index = 0; 605#endif /* CONFIG_SAE */ 606 607 if (radio_add_work(wpa_s, bss->freq, "sme-connect", 1, 608 sme_auth_start_cb, cwork) < 0) 609 wpas_connect_work_free(cwork); 610} 611 612 613#ifdef CONFIG_SAE 614 615static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction, 616 u16 status_code, const u8 *data, size_t len) 617{ 618 int *groups; 619 620 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u " 621 "status code %u", auth_transaction, status_code); 622 623 if (auth_transaction == 1 && 624 status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ && 625 wpa_s->sme.sae.state == SAE_COMMITTED && 626 wpa_s->current_bss && wpa_s->current_ssid) { 627 int default_groups[] = { 19, 20, 21, 25, 26, 0 }; 628 u16 group; 629 630 groups = wpa_s->conf->sae_groups; 631 if (!groups || groups[0] <= 0) 632 groups = default_groups; 633 634 if (len < sizeof(le16)) { 635 wpa_dbg(wpa_s, MSG_DEBUG, 636 "SME: Too short SAE anti-clogging token request"); 637 return -1; 638 } 639 group = WPA_GET_LE16(data); 640 wpa_dbg(wpa_s, MSG_DEBUG, 641 "SME: SAE anti-clogging token requested (group %u)", 642 group); 643 if (sae_group_allowed(&wpa_s->sme.sae, groups, group) != 644 WLAN_STATUS_SUCCESS) { 645 wpa_dbg(wpa_s, MSG_ERROR, 646 "SME: SAE group %u of anti-clogging request is invalid", 647 group); 648 return -1; 649 } 650 wpabuf_free(wpa_s->sme.sae_token); 651 wpa_s->sme.sae_token = wpabuf_alloc_copy(data + sizeof(le16), 652 len - sizeof(le16)); 653 sme_send_authentication(wpa_s, wpa_s->current_bss, 654 wpa_s->current_ssid, 1); 655 return 0; 656 } 657 658 if (auth_transaction == 1 && 659 status_code == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED && 660 wpa_s->sme.sae.state == SAE_COMMITTED && 661 wpa_s->current_bss && wpa_s->current_ssid) { 662 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE group not supported"); 663 wpa_s->sme.sae_group_index++; 664 if (sme_set_sae_group(wpa_s) < 0) 665 return -1; /* no other groups enabled */ 666 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Try next enabled SAE group"); 667 sme_send_authentication(wpa_s, wpa_s->current_bss, 668 wpa_s->current_ssid, 1); 669 return 0; 670 } 671 672 if (status_code != WLAN_STATUS_SUCCESS) 673 return -1; 674 675 if (auth_transaction == 1) { 676 groups = wpa_s->conf->sae_groups; 677 678 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit"); 679 if (wpa_s->current_bss == NULL || 680 wpa_s->current_ssid == NULL) 681 return -1; 682 if (wpa_s->sme.sae.state != SAE_COMMITTED) 683 return -1; 684 if (groups && groups[0] <= 0) 685 groups = NULL; 686 if (sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL, 687 groups) != WLAN_STATUS_SUCCESS) 688 return -1; 689 690 if (sae_process_commit(&wpa_s->sme.sae) < 0) { 691 wpa_printf(MSG_DEBUG, "SAE: Failed to process peer " 692 "commit"); 693 return -1; 694 } 695 696 wpabuf_free(wpa_s->sme.sae_token); 697 wpa_s->sme.sae_token = NULL; 698 sme_send_authentication(wpa_s, wpa_s->current_bss, 699 wpa_s->current_ssid, 0); 700 return 0; 701 } else if (auth_transaction == 2) { 702 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm"); 703 if (wpa_s->sme.sae.state != SAE_CONFIRMED) 704 return -1; 705 if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0) 706 return -1; 707 wpa_s->sme.sae.state = SAE_ACCEPTED; 708 sae_clear_temp_data(&wpa_s->sme.sae); 709 return 1; 710 } 711 712 return -1; 713} 714#endif /* CONFIG_SAE */ 715 716 717void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data) 718{ 719 struct wpa_ssid *ssid = wpa_s->current_ssid; 720 721 if (ssid == NULL) { 722 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event " 723 "when network is not selected"); 724 return; 725 } 726 727 if (wpa_s->wpa_state != WPA_AUTHENTICATING) { 728 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event " 729 "when not in authenticating state"); 730 return; 731 } 732 733 if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) { 734 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with " 735 "unexpected peer " MACSTR, 736 MAC2STR(data->auth.peer)); 737 return; 738 } 739 740 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR 741 " auth_type=%d auth_transaction=%d status_code=%d", 742 MAC2STR(data->auth.peer), data->auth.auth_type, 743 data->auth.auth_transaction, data->auth.status_code); 744 wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs", 745 data->auth.ies, data->auth.ies_len); 746 747 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL); 748 749#ifdef CONFIG_SAE 750 if (data->auth.auth_type == WLAN_AUTH_SAE) { 751 int res; 752 res = sme_sae_auth(wpa_s, data->auth.auth_transaction, 753 data->auth.status_code, data->auth.ies, 754 data->auth.ies_len); 755 if (res < 0) { 756 wpas_connection_failed(wpa_s, wpa_s->pending_bssid); 757 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); 758 759 } 760 if (res != 1) 761 return; 762 763 wpa_printf(MSG_DEBUG, "SME: SAE completed - setting PMK for " 764 "4-way handshake"); 765 wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN, 766 wpa_s->pending_bssid); 767 } 768#endif /* CONFIG_SAE */ 769 770 if (data->auth.status_code != WLAN_STATUS_SUCCESS) { 771 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status " 772 "code %d)", data->auth.status_code); 773 774 if (data->auth.status_code != 775 WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG || 776 wpa_s->sme.auth_alg == data->auth.auth_type || 777 wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) { 778 wpas_connection_failed(wpa_s, wpa_s->pending_bssid); 779 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); 780 return; 781 } 782 783 wpas_connect_work_done(wpa_s); 784 785 switch (data->auth.auth_type) { 786 case WLAN_AUTH_OPEN: 787 wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED; 788 789 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth"); 790 wpa_supplicant_associate(wpa_s, wpa_s->current_bss, 791 wpa_s->current_ssid); 792 return; 793 794 case WLAN_AUTH_SHARED_KEY: 795 wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP; 796 797 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth"); 798 wpa_supplicant_associate(wpa_s, wpa_s->current_bss, 799 wpa_s->current_ssid); 800 return; 801 802 default: 803 return; 804 } 805 } 806 807#ifdef CONFIG_IEEE80211R 808 if (data->auth.auth_type == WLAN_AUTH_FT) { 809 union wpa_event_data edata; 810 os_memset(&edata, 0, sizeof(edata)); 811 edata.ft_ies.ies = data->auth.ies; 812 edata.ft_ies.ies_len = data->auth.ies_len; 813 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN); 814 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata); 815 } 816#endif /* CONFIG_IEEE80211R */ 817 818 sme_associate(wpa_s, ssid->mode, data->auth.peer, 819 data->auth.auth_type); 820} 821 822 823void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode, 824 const u8 *bssid, u16 auth_type) 825{ 826 struct wpa_driver_associate_params params; 827 struct ieee802_11_elems elems; 828#ifdef CONFIG_HT_OVERRIDES 829 struct ieee80211_ht_capabilities htcaps; 830 struct ieee80211_ht_capabilities htcaps_mask; 831#endif /* CONFIG_HT_OVERRIDES */ 832#ifdef CONFIG_VHT_OVERRIDES 833 struct ieee80211_vht_capabilities vhtcaps; 834 struct ieee80211_vht_capabilities vhtcaps_mask; 835#endif /* CONFIG_VHT_OVERRIDES */ 836 837 os_memset(¶ms, 0, sizeof(params)); 838 params.bssid = bssid; 839 params.ssid = wpa_s->sme.ssid; 840 params.ssid_len = wpa_s->sme.ssid_len; 841 params.freq.freq = wpa_s->sme.freq; 842 params.bg_scan_period = wpa_s->current_ssid ? 843 wpa_s->current_ssid->bg_scan_period : -1; 844 params.wpa_ie = wpa_s->sme.assoc_req_ie_len ? 845 wpa_s->sme.assoc_req_ie : NULL; 846 params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len; 847 params.pairwise_suite = wpa_s->pairwise_cipher; 848 params.group_suite = wpa_s->group_cipher; 849 params.key_mgmt_suite = wpa_s->key_mgmt; 850 params.wpa_proto = wpa_s->wpa_proto; 851#ifdef CONFIG_HT_OVERRIDES 852 os_memset(&htcaps, 0, sizeof(htcaps)); 853 os_memset(&htcaps_mask, 0, sizeof(htcaps_mask)); 854 params.htcaps = (u8 *) &htcaps; 855 params.htcaps_mask = (u8 *) &htcaps_mask; 856 wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, ¶ms); 857#endif /* CONFIG_HT_OVERRIDES */ 858#ifdef CONFIG_VHT_OVERRIDES 859 os_memset(&vhtcaps, 0, sizeof(vhtcaps)); 860 os_memset(&vhtcaps_mask, 0, sizeof(vhtcaps_mask)); 861 params.vhtcaps = &vhtcaps; 862 params.vhtcaps_mask = &vhtcaps_mask; 863 wpa_supplicant_apply_vht_overrides(wpa_s, wpa_s->current_ssid, ¶ms); 864#endif /* CONFIG_VHT_OVERRIDES */ 865#ifdef CONFIG_IEEE80211R 866 if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) { 867 params.wpa_ie = wpa_s->sme.ft_ies; 868 params.wpa_ie_len = wpa_s->sme.ft_ies_len; 869 } 870#endif /* CONFIG_IEEE80211R */ 871 params.mode = mode; 872 params.mgmt_frame_protection = wpa_s->sme.mfp; 873 params.rrm_used = wpa_s->rrm.rrm_used; 874 if (wpa_s->sme.prev_bssid_set) 875 params.prev_bssid = wpa_s->sme.prev_bssid; 876 877 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR 878 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid), 879 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "", 880 params.freq.freq); 881 882 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING); 883 884 if (params.wpa_ie == NULL || 885 ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0) 886 < 0) { 887 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!"); 888 os_memset(&elems, 0, sizeof(elems)); 889 } 890 if (elems.rsn_ie) { 891 params.wpa_proto = WPA_PROTO_RSN; 892 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2, 893 elems.rsn_ie_len + 2); 894 } else if (elems.wpa_ie) { 895 params.wpa_proto = WPA_PROTO_WPA; 896 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2, 897 elems.wpa_ie_len + 2); 898 } else if (elems.osen) { 899 params.wpa_proto = WPA_PROTO_OSEN; 900 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.osen - 2, 901 elems.osen_len + 2); 902 } else 903 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0); 904 if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group) 905 params.p2p = 1; 906 907 if (wpa_s->parent->set_sta_uapsd) 908 params.uapsd = wpa_s->parent->sta_uapsd; 909 else 910 params.uapsd = -1; 911 912 if (wpa_drv_associate(wpa_s, ¶ms) < 0) { 913 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the " 914 "driver failed"); 915 wpas_connection_failed(wpa_s, wpa_s->pending_bssid); 916 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); 917 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN); 918 return; 919 } 920 921 eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s, 922 NULL); 923} 924 925 926int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md, 927 const u8 *ies, size_t ies_len) 928{ 929 if (md == NULL || ies == NULL) { 930 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain"); 931 os_free(wpa_s->sme.ft_ies); 932 wpa_s->sme.ft_ies = NULL; 933 wpa_s->sme.ft_ies_len = 0; 934 wpa_s->sme.ft_used = 0; 935 return 0; 936 } 937 938 os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN); 939 wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len); 940 os_free(wpa_s->sme.ft_ies); 941 wpa_s->sme.ft_ies = os_malloc(ies_len); 942 if (wpa_s->sme.ft_ies == NULL) 943 return -1; 944 os_memcpy(wpa_s->sme.ft_ies, ies, ies_len); 945 wpa_s->sme.ft_ies_len = ies_len; 946 return 0; 947} 948 949 950static void sme_deauth(struct wpa_supplicant *wpa_s) 951{ 952 int bssid_changed; 953 954 bssid_changed = !is_zero_ether_addr(wpa_s->bssid); 955 956 if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid, 957 WLAN_REASON_DEAUTH_LEAVING) < 0) { 958 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver " 959 "failed"); 960 } 961 wpa_s->sme.prev_bssid_set = 0; 962 963 wpas_connection_failed(wpa_s, wpa_s->pending_bssid); 964 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); 965 os_memset(wpa_s->bssid, 0, ETH_ALEN); 966 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN); 967 if (bssid_changed) 968 wpas_notify_bssid_changed(wpa_s); 969} 970 971 972void sme_event_assoc_reject(struct wpa_supplicant *wpa_s, 973 union wpa_event_data *data) 974{ 975 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: " 976 "status code %d", MAC2STR(wpa_s->pending_bssid), 977 data->assoc_reject.status_code); 978 979 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL); 980 981#ifdef CONFIG_SAE 982 if (wpa_s->sme.sae_pmksa_caching && wpa_s->current_ssid && 983 wpa_key_mgmt_sae(wpa_s->current_ssid->key_mgmt)) { 984 wpa_dbg(wpa_s, MSG_DEBUG, 985 "PMKSA caching attempt rejected - drop PMKSA cache entry and fall back to SAE authentication"); 986 wpa_sm_aborted_cached(wpa_s->wpa); 987 wpa_sm_pmksa_cache_flush(wpa_s->wpa, wpa_s->current_ssid); 988 if (wpa_s->current_bss) { 989 struct wpa_bss *bss = wpa_s->current_bss; 990 struct wpa_ssid *ssid = wpa_s->current_ssid; 991 992 wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid, 993 WLAN_REASON_DEAUTH_LEAVING); 994 wpas_connect_work_done(wpa_s); 995 wpa_supplicant_mark_disassoc(wpa_s); 996 wpa_supplicant_connect(wpa_s, bss, ssid); 997 return; 998 } 999 } 1000#endif /* CONFIG_SAE */ 1001 1002 /* 1003 * For now, unconditionally terminate the previous authentication. In 1004 * theory, this should not be needed, but mac80211 gets quite confused 1005 * if the authentication is left pending.. Some roaming cases might 1006 * benefit from using the previous authentication, so this could be 1007 * optimized in the future. 1008 */ 1009 sme_deauth(wpa_s); 1010} 1011 1012 1013void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s, 1014 union wpa_event_data *data) 1015{ 1016 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out"); 1017 wpas_connection_failed(wpa_s, wpa_s->pending_bssid); 1018 wpa_supplicant_mark_disassoc(wpa_s); 1019} 1020 1021 1022void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s, 1023 union wpa_event_data *data) 1024{ 1025 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out"); 1026 wpas_connection_failed(wpa_s, wpa_s->pending_bssid); 1027 wpa_supplicant_mark_disassoc(wpa_s); 1028} 1029 1030 1031void sme_event_disassoc(struct wpa_supplicant *wpa_s, 1032 struct disassoc_info *info) 1033{ 1034 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received"); 1035 if (wpa_s->sme.prev_bssid_set) { 1036 /* 1037 * cfg80211/mac80211 can get into somewhat confused state if 1038 * the AP only disassociates us and leaves us in authenticated 1039 * state. For now, force the state to be cleared to avoid 1040 * confusing errors if we try to associate with the AP again. 1041 */ 1042 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear " 1043 "driver state"); 1044 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid, 1045 WLAN_REASON_DEAUTH_LEAVING); 1046 } 1047} 1048 1049 1050static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx) 1051{ 1052 struct wpa_supplicant *wpa_s = eloop_ctx; 1053 if (wpa_s->wpa_state == WPA_AUTHENTICATING) { 1054 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout"); 1055 sme_deauth(wpa_s); 1056 } 1057} 1058 1059 1060static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx) 1061{ 1062 struct wpa_supplicant *wpa_s = eloop_ctx; 1063 if (wpa_s->wpa_state == WPA_ASSOCIATING) { 1064 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout"); 1065 sme_deauth(wpa_s); 1066 } 1067} 1068 1069 1070void sme_state_changed(struct wpa_supplicant *wpa_s) 1071{ 1072 /* Make sure timers are cleaned up appropriately. */ 1073 if (wpa_s->wpa_state != WPA_ASSOCIATING) 1074 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL); 1075 if (wpa_s->wpa_state != WPA_AUTHENTICATING) 1076 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL); 1077} 1078 1079 1080void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s, 1081 const u8 *prev_pending_bssid) 1082{ 1083 /* 1084 * mac80211-workaround to force deauth on failed auth cmd, 1085 * requires us to remain in authenticating state to allow the 1086 * second authentication attempt to be continued properly. 1087 */ 1088 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication " 1089 "to proceed after disconnection event"); 1090 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING); 1091 os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN); 1092 1093 /* 1094 * Re-arm authentication timer in case auth fails for whatever reason. 1095 */ 1096 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL); 1097 eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s, 1098 NULL); 1099} 1100 1101 1102void sme_clear_on_disassoc(struct wpa_supplicant *wpa_s) 1103{ 1104 wpa_s->sme.prev_bssid_set = 0; 1105#ifdef CONFIG_SAE 1106 wpabuf_free(wpa_s->sme.sae_token); 1107 wpa_s->sme.sae_token = NULL; 1108 sae_clear_data(&wpa_s->sme.sae); 1109#endif /* CONFIG_SAE */ 1110#ifdef CONFIG_IEEE80211R 1111 if (wpa_s->sme.ft_ies) 1112 sme_update_ft_ies(wpa_s, NULL, NULL, 0); 1113#endif /* CONFIG_IEEE80211R */ 1114} 1115 1116 1117void sme_deinit(struct wpa_supplicant *wpa_s) 1118{ 1119 os_free(wpa_s->sme.ft_ies); 1120 wpa_s->sme.ft_ies = NULL; 1121 wpa_s->sme.ft_ies_len = 0; 1122#ifdef CONFIG_IEEE80211W 1123 sme_stop_sa_query(wpa_s); 1124#endif /* CONFIG_IEEE80211W */ 1125 sme_clear_on_disassoc(wpa_s); 1126 1127 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL); 1128 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL); 1129 eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL); 1130} 1131 1132 1133static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s, 1134 const u8 *chan_list, u8 num_channels, 1135 u8 num_intol) 1136{ 1137 struct ieee80211_2040_bss_coex_ie *bc_ie; 1138 struct ieee80211_2040_intol_chan_report *ic_report; 1139 struct wpabuf *buf; 1140 1141 wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR 1142 " (num_channels=%u num_intol=%u)", 1143 MAC2STR(wpa_s->bssid), num_channels, num_intol); 1144 wpa_hexdump(MSG_DEBUG, "SME: 20/40 BSS Intolerant Channels", 1145 chan_list, num_channels); 1146 1147 buf = wpabuf_alloc(2 + /* action.category + action_code */ 1148 sizeof(struct ieee80211_2040_bss_coex_ie) + 1149 sizeof(struct ieee80211_2040_intol_chan_report) + 1150 num_channels); 1151 if (buf == NULL) 1152 return; 1153 1154 wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC); 1155 wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX); 1156 1157 bc_ie = wpabuf_put(buf, sizeof(*bc_ie)); 1158 bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE; 1159 bc_ie->length = 1; 1160 if (num_intol) 1161 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ; 1162 1163 if (num_channels > 0) { 1164 ic_report = wpabuf_put(buf, sizeof(*ic_report)); 1165 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT; 1166 ic_report->length = num_channels + 1; 1167 ic_report->op_class = 0; 1168 os_memcpy(wpabuf_put(buf, num_channels), chan_list, 1169 num_channels); 1170 } 1171 1172 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid, 1173 wpa_s->own_addr, wpa_s->bssid, 1174 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) { 1175 wpa_msg(wpa_s, MSG_INFO, 1176 "SME: Failed to send 20/40 BSS Coexistence frame"); 1177 } 1178 1179 wpabuf_free(buf); 1180} 1181 1182 1183int sme_proc_obss_scan(struct wpa_supplicant *wpa_s) 1184{ 1185 struct wpa_bss *bss; 1186 const u8 *ie; 1187 u16 ht_cap; 1188 u8 chan_list[P2P_MAX_CHANNELS], channel; 1189 u8 num_channels = 0, num_intol = 0, i; 1190 1191 if (!wpa_s->sme.sched_obss_scan) 1192 return 0; 1193 1194 wpa_s->sme.sched_obss_scan = 0; 1195 if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED) 1196 return 1; 1197 1198 /* 1199 * Check whether AP uses regulatory triplet or channel triplet in 1200 * country info. Right now the operating class of the BSS channel 1201 * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12), 1202 * based on the assumption that operating class triplet is not used in 1203 * beacon frame. If the First Channel Number/Operating Extension 1204 * Identifier octet has a positive integer value of 201 or greater, 1205 * then its operating class triplet. 1206 * 1207 * TODO: If Supported Operating Classes element is present in beacon 1208 * frame, have to lookup operating class in Annex E and fill them in 1209 * 2040 coex frame. 1210 */ 1211 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY); 1212 if (ie && (ie[1] >= 6) && (ie[5] >= 201)) 1213 return 1; 1214 1215 os_memset(chan_list, 0, sizeof(chan_list)); 1216 1217 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) { 1218 /* Skip other band bss */ 1219 enum hostapd_hw_mode mode; 1220 mode = ieee80211_freq_to_chan(bss->freq, &channel); 1221 if (mode != HOSTAPD_MODE_IEEE80211G && 1222 mode != HOSTAPD_MODE_IEEE80211B) 1223 continue; 1224 1225 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP); 1226 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0; 1227 wpa_printf(MSG_DEBUG, "SME OBSS scan BSS " MACSTR 1228 " freq=%u chan=%u ht_cap=0x%x", 1229 MAC2STR(bss->bssid), bss->freq, channel, ht_cap); 1230 1231 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) { 1232 if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT) 1233 num_intol++; 1234 1235 /* Check whether the channel is already considered */ 1236 for (i = 0; i < num_channels; i++) { 1237 if (channel == chan_list[i]) 1238 break; 1239 } 1240 if (i != num_channels) 1241 continue; 1242 1243 chan_list[num_channels++] = channel; 1244 } 1245 } 1246 1247 sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol); 1248 return 1; 1249} 1250 1251 1252static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes, 1253 u16 num_modes, 1254 enum hostapd_hw_mode mode) 1255{ 1256 u16 i; 1257 1258 for (i = 0; i < num_modes; i++) { 1259 if (modes[i].mode == mode) 1260 return &modes[i]; 1261 } 1262 1263 return NULL; 1264} 1265 1266 1267static void wpa_obss_scan_freqs_list(struct wpa_supplicant *wpa_s, 1268 struct wpa_driver_scan_params *params) 1269{ 1270 /* Include only affected channels */ 1271 struct hostapd_hw_modes *mode; 1272 int count, i; 1273 int start, end; 1274 1275 mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, 1276 HOSTAPD_MODE_IEEE80211G); 1277 if (mode == NULL) { 1278 /* No channels supported in this band - use empty list */ 1279 params->freqs = os_zalloc(sizeof(int)); 1280 return; 1281 } 1282 1283 if (wpa_s->sme.ht_sec_chan == HT_SEC_CHAN_UNKNOWN && 1284 wpa_s->current_bss) { 1285 const u8 *ie; 1286 1287 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_OPERATION); 1288 if (ie && ie[1] >= 2) { 1289 u8 o; 1290 1291 o = ie[3] & HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK; 1292 if (o == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE) 1293 wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_ABOVE; 1294 else if (o == HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW) 1295 wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_BELOW; 1296 } 1297 } 1298 1299 start = wpa_s->assoc_freq - 10; 1300 end = wpa_s->assoc_freq + 10; 1301 switch (wpa_s->sme.ht_sec_chan) { 1302 case HT_SEC_CHAN_UNKNOWN: 1303 /* HT40+ possible on channels 1..9 */ 1304 if (wpa_s->assoc_freq <= 2452) 1305 start -= 20; 1306 /* HT40- possible on channels 5-13 */ 1307 if (wpa_s->assoc_freq >= 2432) 1308 end += 20; 1309 break; 1310 case HT_SEC_CHAN_ABOVE: 1311 end += 20; 1312 break; 1313 case HT_SEC_CHAN_BELOW: 1314 start -= 20; 1315 break; 1316 } 1317 wpa_printf(MSG_DEBUG, 1318 "OBSS: assoc_freq %d possible affected range %d-%d", 1319 wpa_s->assoc_freq, start, end); 1320 1321 params->freqs = os_calloc(mode->num_channels + 1, sizeof(int)); 1322 if (params->freqs == NULL) 1323 return; 1324 for (count = 0, i = 0; i < mode->num_channels; i++) { 1325 int freq; 1326 1327 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED) 1328 continue; 1329 freq = mode->channels[i].freq; 1330 if (freq - 10 >= end || freq + 10 <= start) 1331 continue; /* not affected */ 1332 params->freqs[count++] = freq; 1333 } 1334} 1335 1336 1337static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx) 1338{ 1339 struct wpa_supplicant *wpa_s = eloop_ctx; 1340 struct wpa_driver_scan_params params; 1341 1342 if (!wpa_s->current_bss) { 1343 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request"); 1344 return; 1345 } 1346 1347 os_memset(¶ms, 0, sizeof(params)); 1348 wpa_obss_scan_freqs_list(wpa_s, ¶ms); 1349 params.low_priority = 1; 1350 wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan"); 1351 1352 if (wpa_supplicant_trigger_scan(wpa_s, ¶ms)) 1353 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan"); 1354 else 1355 wpa_s->sme.sched_obss_scan = 1; 1356 os_free(params.freqs); 1357 1358 eloop_register_timeout(wpa_s->sme.obss_scan_int, 0, 1359 sme_obss_scan_timeout, wpa_s, NULL); 1360} 1361 1362 1363void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable) 1364{ 1365 const u8 *ie; 1366 struct wpa_bss *bss = wpa_s->current_bss; 1367 struct wpa_ssid *ssid = wpa_s->current_ssid; 1368 struct hostapd_hw_modes *hw_mode = NULL; 1369 int i; 1370 1371 eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL); 1372 wpa_s->sme.sched_obss_scan = 0; 1373 wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_UNKNOWN; 1374 if (!enable) 1375 return; 1376 1377 /* 1378 * Schedule OBSS scan if driver is using station SME in wpa_supplicant 1379 * or it expects OBSS scan to be performed by wpa_supplicant. 1380 */ 1381 if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) || 1382 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) || 1383 ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA) 1384 return; 1385 1386 if (!wpa_s->hw.modes) 1387 return; 1388 1389 /* only HT caps in 11g mode are relevant */ 1390 for (i = 0; i < wpa_s->hw.num_modes; i++) { 1391 hw_mode = &wpa_s->hw.modes[i]; 1392 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G) 1393 break; 1394 } 1395 1396 /* Driver does not support HT40 for 11g or doesn't have 11g. */ 1397 if (i == wpa_s->hw.num_modes || !hw_mode || 1398 !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET)) 1399 return; 1400 1401 if (bss == NULL || bss->freq < 2400 || bss->freq > 2500) 1402 return; /* Not associated on 2.4 GHz band */ 1403 1404 /* Check whether AP supports HT40 */ 1405 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP); 1406 if (!ie || ie[1] < 2 || 1407 !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET)) 1408 return; /* AP does not support HT40 */ 1409 1410 ie = wpa_bss_get_ie(wpa_s->current_bss, 1411 WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS); 1412 if (!ie || ie[1] < 14) 1413 return; /* AP does not request OBSS scans */ 1414 1415 wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6); 1416 if (wpa_s->sme.obss_scan_int < 10) { 1417 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u " 1418 "replaced with the minimum 10 sec", 1419 wpa_s->sme.obss_scan_int); 1420 wpa_s->sme.obss_scan_int = 10; 1421 } 1422 wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec", 1423 wpa_s->sme.obss_scan_int); 1424 eloop_register_timeout(wpa_s->sme.obss_scan_int, 0, 1425 sme_obss_scan_timeout, wpa_s, NULL); 1426} 1427 1428 1429#ifdef CONFIG_IEEE80211W 1430 1431static const unsigned int sa_query_max_timeout = 1000; 1432static const unsigned int sa_query_retry_timeout = 201; 1433 1434static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s) 1435{ 1436 u32 tu; 1437 struct os_reltime now, passed; 1438 os_get_reltime(&now); 1439 os_reltime_sub(&now, &wpa_s->sme.sa_query_start, &passed); 1440 tu = (passed.sec * 1000000 + passed.usec) / 1024; 1441 if (sa_query_max_timeout < tu) { 1442 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out"); 1443 sme_stop_sa_query(wpa_s); 1444 wpa_supplicant_deauthenticate( 1445 wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID); 1446 return 1; 1447 } 1448 1449 return 0; 1450} 1451 1452 1453static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s, 1454 const u8 *trans_id) 1455{ 1456 u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN]; 1457 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to " 1458 MACSTR, MAC2STR(wpa_s->bssid)); 1459 wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID", 1460 trans_id, WLAN_SA_QUERY_TR_ID_LEN); 1461 req[0] = WLAN_ACTION_SA_QUERY; 1462 req[1] = WLAN_SA_QUERY_REQUEST; 1463 os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN); 1464 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid, 1465 wpa_s->own_addr, wpa_s->bssid, 1466 req, sizeof(req), 0) < 0) 1467 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query " 1468 "Request"); 1469} 1470 1471 1472static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx) 1473{ 1474 struct wpa_supplicant *wpa_s = eloop_ctx; 1475 unsigned int timeout, sec, usec; 1476 u8 *trans_id, *nbuf; 1477 1478 if (wpa_s->sme.sa_query_count > 0 && 1479 sme_check_sa_query_timeout(wpa_s)) 1480 return; 1481 1482 nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id, 1483 wpa_s->sme.sa_query_count + 1, 1484 WLAN_SA_QUERY_TR_ID_LEN); 1485 if (nbuf == NULL) 1486 return; 1487 if (wpa_s->sme.sa_query_count == 0) { 1488 /* Starting a new SA Query procedure */ 1489 os_get_reltime(&wpa_s->sme.sa_query_start); 1490 } 1491 trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN; 1492 wpa_s->sme.sa_query_trans_id = nbuf; 1493 wpa_s->sme.sa_query_count++; 1494 1495 if (os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN) < 0) { 1496 wpa_printf(MSG_DEBUG, "Could not generate SA Query ID"); 1497 return; 1498 } 1499 1500 timeout = sa_query_retry_timeout; 1501 sec = ((timeout / 1000) * 1024) / 1000; 1502 usec = (timeout % 1000) * 1024; 1503 eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL); 1504 1505 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d", 1506 wpa_s->sme.sa_query_count); 1507 1508 sme_send_sa_query_req(wpa_s, trans_id); 1509} 1510 1511 1512static void sme_start_sa_query(struct wpa_supplicant *wpa_s) 1513{ 1514 sme_sa_query_timer(wpa_s, NULL); 1515} 1516 1517 1518static void sme_stop_sa_query(struct wpa_supplicant *wpa_s) 1519{ 1520 eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL); 1521 os_free(wpa_s->sme.sa_query_trans_id); 1522 wpa_s->sme.sa_query_trans_id = NULL; 1523 wpa_s->sme.sa_query_count = 0; 1524} 1525 1526 1527void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa, 1528 const u8 *da, u16 reason_code) 1529{ 1530 struct wpa_ssid *ssid; 1531 struct os_reltime now; 1532 1533 if (wpa_s->wpa_state != WPA_COMPLETED) 1534 return; 1535 ssid = wpa_s->current_ssid; 1536 if (ssid == NULL || 1537 (ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ? 1538 wpa_s->conf->pmf : ssid->ieee80211w) == NO_MGMT_FRAME_PROTECTION) 1539 return; 1540 if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) 1541 return; 1542 if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA && 1543 reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA) 1544 return; 1545 if (wpa_s->sme.sa_query_count > 0) 1546 return; 1547 1548 os_get_reltime(&now); 1549 if (wpa_s->sme.last_unprot_disconnect.sec && 1550 !os_reltime_expired(&now, &wpa_s->sme.last_unprot_disconnect, 10)) 1551 return; /* limit SA Query procedure frequency */ 1552 wpa_s->sme.last_unprot_disconnect = now; 1553 1554 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - " 1555 "possible AP/STA state mismatch - trigger SA Query"); 1556 sme_start_sa_query(wpa_s); 1557} 1558 1559 1560void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa, 1561 const u8 *data, size_t len) 1562{ 1563 int i; 1564 1565 if (wpa_s->sme.sa_query_trans_id == NULL || 1566 len < 1 + WLAN_SA_QUERY_TR_ID_LEN || 1567 data[0] != WLAN_SA_QUERY_RESPONSE) 1568 return; 1569 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from " 1570 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]); 1571 1572 if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) 1573 return; 1574 1575 for (i = 0; i < wpa_s->sme.sa_query_count; i++) { 1576 if (os_memcmp(wpa_s->sme.sa_query_trans_id + 1577 i * WLAN_SA_QUERY_TR_ID_LEN, 1578 data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0) 1579 break; 1580 } 1581 1582 if (i >= wpa_s->sme.sa_query_count) { 1583 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query " 1584 "transaction identifier found"); 1585 return; 1586 } 1587 1588 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received " 1589 "from " MACSTR, MAC2STR(sa)); 1590 sme_stop_sa_query(wpa_s); 1591} 1592 1593#endif /* CONFIG_IEEE80211W */ 1594