wpa_supplicant/sme.c

   1 /*
   2  * wpa_supplicant - SME
   3  * Copyright (c) 2009-2010, 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
  15 #include "includes.h"
  16
  17 #include "common.h"
  18 #include "utils/eloop.h"
  19 #include "common/ieee802_11_defs.h"
  20 #include "common/ieee802_11_common.h"
  21 #include "eapol_supp/eapol_supp_sm.h"
  22 #include "common/wpa_common.h"
  23 #include "rsn_supp/wpa.h"
  24 #include "rsn_supp/pmksa_cache.h"
  25 #include "config.h"
  26 #include "wpa_supplicant_i.h"
  27 #include "driver_i.h"
  28 #include "wpas_glue.h"
  29 #include "wps_supplicant.h"
  30 #include "p2p_supplicant.h"
  31 #include "notify.h"
  32 #include "blacklist.h"
  33 #include "bss.h"
  34 #include "scan.h"
  35 #include "sme.h"
  36
  37 #define SME_AUTH_TIMEOUT 5
  38 #define SME_ASSOC_TIMEOUT 5
  39
  40 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx);
  41 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx);
  42 #ifdef CONFIG_IEEE80211W
  43 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s);
  44 #endif /* CONFIG_IEEE80211W */
  45
  46
  47 void sme_authenticate(struct wpa_supplicant *wpa_s,
  48                       struct wpa_bss *bss, struct wpa_ssid *ssid)
  49 {
  50         struct wpa_driver_auth_params params;
  51         struct wpa_ssid *old_ssid;
  52 #ifdef CONFIG_IEEE80211R
  53         const u8 *ie;
  54 #endif /* CONFIG_IEEE80211R */
  55 #ifdef CONFIG_IEEE80211R
  56         const u8 *md = NULL;
  57 #endif /* CONFIG_IEEE80211R */
  58         int i, bssid_changed;
  59
  60         if (bss == NULL) {
  61                 wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for "
  62                         "the network");
  63                 return;
  64         }
  65
  66         wpa_s->current_bss = bss;
  67
  68         os_memset(&params, 0, sizeof(params));
  69         wpa_s->reassociate = 0;
  70
  71         params.freq = bss->freq;
  72         params.bssid = bss->bssid;
  73         params.ssid = bss->ssid;
  74         params.ssid_len = bss->ssid_len;
  75
  76         if (wpa_s->sme.ssid_len != params.ssid_len ||
  77             os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
  78                 wpa_s->sme.prev_bssid_set = 0;
  79
  80         wpa_s->sme.freq = params.freq;
  81         os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
  82         wpa_s->sme.ssid_len = params.ssid_len;
  83
  84         params.auth_alg = WPA_AUTH_ALG_OPEN;
  85 #ifdef IEEE8021X_EAPOL
  86         if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
  87                 if (ssid->leap) {
  88                         if (ssid->non_leap == 0)
  89                                 params.auth_alg = WPA_AUTH_ALG_LEAP;
  90                         else
  91                                 params.auth_alg |= WPA_AUTH_ALG_LEAP;
  92                 }
  93         }
  94 #endif /* IEEE8021X_EAPOL */
  95         wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
  96                 params.auth_alg);
  97         if (ssid->auth_alg) {
  98                 params.auth_alg = ssid->auth_alg;
  99                 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
 100                         "0x%x", params.auth_alg);
 101         }
 102
 103         for (i = 0; i < NUM_WEP_KEYS; i++) {
 104                 if (ssid->wep_key_len[i])
 105                         params.wep_key[i] = ssid->wep_key[i];
 106                 params.wep_key_len[i] = ssid->wep_key_len[i];
 107         }
 108         params.wep_tx_keyidx = ssid->wep_tx_keyidx;
 109
 110         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 111         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 112         os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
 113         if (bssid_changed)
 114                 wpas_notify_bssid_changed(wpa_s);
 115
 116         if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
 117              wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
 118             (ssid->key_mgmt & (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK |
 119                                WPA_KEY_MGMT_FT_IEEE8021X |
 120                                WPA_KEY_MGMT_FT_PSK |
 121                                WPA_KEY_MGMT_IEEE8021X_SHA256 |
 122                                WPA_KEY_MGMT_PSK_SHA256))) {
 123                 int try_opportunistic;
 124                 try_opportunistic = ssid->proactive_key_caching &&
 125                         (ssid->proto & WPA_PROTO_RSN);
 126                 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
 127                                             wpa_s->current_ssid,
 128                                             try_opportunistic) == 0)
 129                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
 130                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 131                 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
 132                                               wpa_s->sme.assoc_req_ie,
 133                                               &wpa_s->sme.assoc_req_ie_len)) {
 134                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 135                                 "key management and encryption suites");
 136                         return;
 137                 }
 138         } else if (ssid->key_mgmt &
 139                    (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
 140                     WPA_KEY_MGMT_WPA_NONE | WPA_KEY_MGMT_FT_PSK |
 141                     WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_PSK_SHA256 |
 142                     WPA_KEY_MGMT_IEEE8021X_SHA256)) {
 143                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 144                 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
 145                                               wpa_s->sme.assoc_req_ie,
 146                                               &wpa_s->sme.assoc_req_ie_len)) {
 147                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 148                                 "key management and encryption suites (no "
 149                                 "scan results)");
 150                         return;
 151                 }
 152 #ifdef CONFIG_WPS
 153         } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 154                 struct wpabuf *wps_ie;
 155                 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
 156                 if (wps_ie && wpabuf_len(wps_ie) <=
 157                     sizeof(wpa_s->sme.assoc_req_ie)) {
 158                         wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
 159                         os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
 160                                   wpa_s->sme.assoc_req_ie_len);
 161                 } else
 162                         wpa_s->sme.assoc_req_ie_len = 0;
 163                 wpabuf_free(wps_ie);
 164                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 165 #endif /* CONFIG_WPS */
 166         } else {
 167                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 168                 wpa_s->sme.assoc_req_ie_len = 0;
 169         }
 170
 171 #ifdef CONFIG_IEEE80211R
 172         ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
 173         if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
 174                 md = ie + 2;
 175         wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
 176         if (md) {
 177                 /* Prepare for the next transition */
 178                 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
 179         }
 180
 181         if (md && ssid->key_mgmt & (WPA_KEY_MGMT_FT_PSK |
 182                                     WPA_KEY_MGMT_FT_IEEE8021X)) {
 183                 if (wpa_s->sme.assoc_req_ie_len + 5 <
 184                     sizeof(wpa_s->sme.assoc_req_ie)) {
 185                         struct rsn_mdie *mdie;
 186                         u8 *pos = wpa_s->sme.assoc_req_ie +
 187                                 wpa_s->sme.assoc_req_ie_len;
 188                         *pos++ = WLAN_EID_MOBILITY_DOMAIN;
 189                         *pos++ = sizeof(*mdie);
 190                         mdie = (struct rsn_mdie *) pos;
 191                         os_memcpy(mdie->mobility_domain, md,
 192                                   MOBILITY_DOMAIN_ID_LEN);
 193                         mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
 194                         wpa_s->sme.assoc_req_ie_len += 5;
 195                 }
 196
 197                 if (wpa_s->sme.ft_used &&
 198                     os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
 199                     wpa_sm_has_ptk(wpa_s->wpa)) {
 200                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT "
 201                                 "over-the-air");
 202                         params.auth_alg = WPA_AUTH_ALG_FT;
 203                         params.ie = wpa_s->sme.ft_ies;
 204                         params.ie_len = wpa_s->sme.ft_ies_len;
 205                 }
 206         }
 207 #endif /* CONFIG_IEEE80211R */
 208
 209 #ifdef CONFIG_IEEE80211W
 210         wpa_s->sme.mfp = ssid->ieee80211w;
 211         if (ssid->ieee80211w != NO_MGMT_FRAME_PROTECTION) {
 212                 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 213                 struct wpa_ie_data _ie;
 214                 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
 215                     _ie.capabilities &
 216                     (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
 217                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
 218                                 "MFP: require MFP");
 219                         wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
 220                 }
 221         }
 222 #endif /* CONFIG_IEEE80211W */
 223
 224 #ifdef CONFIG_P2P
 225         if (wpa_s->global->p2p) {
 226                 u8 *pos;
 227                 size_t len;
 228                 int res;
 229                 int p2p_group;
 230                 p2p_group = wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_CAPABLE;
 231                 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
 232                 len = sizeof(wpa_s->sme.assoc_req_ie) -
 233                         wpa_s->sme.assoc_req_ie_len;
 234                 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len, p2p_group);
 235                 if (res >= 0)
 236                         wpa_s->sme.assoc_req_ie_len += res;
 237         }
 238 #endif /* CONFIG_P2P */
 239
 240         wpa_supplicant_cancel_scan(wpa_s);
 241
 242         wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
 243                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 244                 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
 245
 246         wpa_clear_keys(wpa_s, bss->bssid);
 247         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 248         old_ssid = wpa_s->current_ssid;
 249         wpa_s->current_ssid = ssid;
 250         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
 251         wpa_supplicant_initiate_eapol(wpa_s);
 252         if (old_ssid != wpa_s->current_ssid)
 253                 wpas_notify_network_changed(wpa_s);
 254
 255         wpa_s->sme.auth_alg = params.auth_alg;
 256         if (wpa_drv_authenticate(wpa_s, &params) < 0) {
 257                 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
 258                         "driver failed");
 259                 wpa_supplicant_req_scan(wpa_s, 1, 0);
 260                 return;
 261         }
 262
 263         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 264                                NULL);
 265
 266         /*
 267          * Association will be started based on the authentication event from
 268          * the driver.
 269          */
 270 }
 271
 272
 273 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
 274 {
 275         struct wpa_ssid *ssid = wpa_s->current_ssid;
 276
 277         if (ssid == NULL) {
 278                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 279                         "when network is not selected");
 280                 return;
 281         }
 282
 283         if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
 284                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 285                         "when not in authenticating state");
 286                 return;
 287         }
 288
 289         if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
 290                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
 291                         "unexpected peer " MACSTR,
 292                         MAC2STR(data->auth.peer));
 293                 return;
 294         }
 295
 296         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
 297                 " auth_type=%d status_code=%d",
 298                 MAC2STR(data->auth.peer), data->auth.auth_type,
 299                 data->auth.status_code);
 300         wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
 301                     data->auth.ies, data->auth.ies_len);
 302
 303         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 304
 305         if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
 306                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
 307                         "code %d)", data->auth.status_code);
 308
 309                 if (data->auth.status_code !=
 310                     WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
 311                     wpa_s->sme.auth_alg == data->auth.auth_type ||
 312                     wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
 313                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 314                         return;
 315                 }
 316
 317                 switch (data->auth.auth_type) {
 318                 case WLAN_AUTH_OPEN:
 319                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 320
 321                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
 322                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 323                                                  wpa_s->current_ssid);
 324                         return;
 325
 326                 case WLAN_AUTH_SHARED_KEY:
 327                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
 328
 329                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
 330                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 331                                                  wpa_s->current_ssid);
 332                         return;
 333
 334                 default:
 335                         return;
 336                 }
 337         }
 338
 339 #ifdef CONFIG_IEEE80211R
 340         if (data->auth.auth_type == WLAN_AUTH_FT) {
 341                 union wpa_event_data edata;
 342                 os_memset(&edata, 0, sizeof(edata));
 343                 edata.ft_ies.ies = data->auth.ies;
 344                 edata.ft_ies.ies_len = data->auth.ies_len;
 345                 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
 346                 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
 347         }
 348 #endif /* CONFIG_IEEE80211R */
 349
 350         sme_associate(wpa_s, ssid->mode, data->auth.peer,
 351                       data->auth.auth_type);
 352 }
 353
 354
 355 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
 356                    const u8 *bssid, u16 auth_type)
 357 {
 358         struct wpa_driver_associate_params params;
 359         struct ieee802_11_elems elems;
 360
 361         os_memset(&params, 0, sizeof(params));
 362         params.bssid = bssid;
 363         params.ssid = wpa_s->sme.ssid;
 364         params.ssid_len = wpa_s->sme.ssid_len;
 365         params.freq = wpa_s->sme.freq;
 366         params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
 367                 wpa_s->sme.assoc_req_ie : NULL;
 368         params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
 369         params.pairwise_suite = cipher_suite2driver(wpa_s->pairwise_cipher);
 370         params.group_suite = cipher_suite2driver(wpa_s->group_cipher);
 371 #ifdef CONFIG_IEEE80211R
 372         if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
 373                 params.wpa_ie = wpa_s->sme.ft_ies;
 374                 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
 375         }
 376 #endif /* CONFIG_IEEE80211R */
 377         params.mode = mode;
 378         params.mgmt_frame_protection = wpa_s->sme.mfp;
 379         if (wpa_s->sme.prev_bssid_set)
 380                 params.prev_bssid = wpa_s->sme.prev_bssid;
 381
 382         wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
 383                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 384                 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
 385                 params.freq);
 386
 387         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
 388
 389         if (params.wpa_ie == NULL ||
 390             ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
 391             < 0) {
 392                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
 393                 os_memset(&elems, 0, sizeof(elems));
 394         }
 395         if (elems.rsn_ie)
 396                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
 397                                         elems.rsn_ie_len + 2);
 398         else if (elems.wpa_ie)
 399                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
 400                                         elems.wpa_ie_len + 2);
 401         else
 402                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 403         if (elems.p2p &&
 404             (wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_CAPABLE))
 405                 params.p2p = 1;
 406
 407         if (wpa_s->parent->set_sta_uapsd)
 408                 params.uapsd = wpa_s->parent->sta_uapsd;
 409         else
 410                 params.uapsd = -1;
 411
 412         if (wpa_drv_associate(wpa_s, &params) < 0) {
 413                 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
 414                         "driver failed");
 415                 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 416                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 417                 return;
 418         }
 419
 420         eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
 421                                NULL);
 422 }
 423
 424
 425 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
 426                       const u8 *ies, size_t ies_len)
 427 {
 428         if (md == NULL || ies == NULL) {
 429                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
 430                 os_free(wpa_s->sme.ft_ies);
 431                 wpa_s->sme.ft_ies = NULL;
 432                 wpa_s->sme.ft_ies_len = 0;
 433                 wpa_s->sme.ft_used = 0;
 434                 return 0;
 435         }
 436
 437         os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
 438         wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
 439         os_free(wpa_s->sme.ft_ies);
 440         wpa_s->sme.ft_ies = os_malloc(ies_len);
 441         if (wpa_s->sme.ft_ies == NULL)
 442                 return -1;
 443         os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
 444         wpa_s->sme.ft_ies_len = ies_len;
 445         return 0;
 446 }
 447
 448
 449 static void sme_deauth(struct wpa_supplicant *wpa_s)
 450 {
 451         int bssid_changed;
 452
 453         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 454
 455         if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
 456                                    WLAN_REASON_DEAUTH_LEAVING) < 0) {
 457                 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
 458                         "failed");
 459         }
 460         wpa_s->sme.prev_bssid_set = 0;
 461
 462         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 463         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 464         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 465         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 466         if (bssid_changed)
 467                 wpas_notify_bssid_changed(wpa_s);
 468 }
 469
 470
 471 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
 472                             union wpa_event_data *data)
 473 {
 474         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
 475                 "status code %d", MAC2STR(wpa_s->pending_bssid),
 476                 data->assoc_reject.status_code);
 477
 478         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 479
 480         /*
 481          * For now, unconditionally terminate the previous authentication. In
 482          * theory, this should not be needed, but mac80211 gets quite confused
 483          * if the authentication is left pending.. Some roaming cases might
 484          * benefit from using the previous authentication, so this could be
 485          * optimized in the future.
 486          */
 487         sme_deauth(wpa_s);
 488 }
 489
 490
 491 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
 492                               union wpa_event_data *data)
 493 {
 494         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
 495         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 496 }
 497
 498
 499 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
 500                                union wpa_event_data *data)
 501 {
 502         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
 503         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 504         wpa_supplicant_mark_disassoc(wpa_s);
 505 }
 506
 507
 508 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
 509                         union wpa_event_data *data)
 510 {
 511         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
 512         if (wpa_s->sme.prev_bssid_set &&
 513             !(wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)) {
 514                 /*
 515                  * cfg80211/mac80211 can get into somewhat confused state if
 516                  * the AP only disassociates us and leaves us in authenticated
 517                  * state. For now, force the state to be cleared to avoid
 518                  * confusing errors if we try to associate with the AP again.
 519                  */
 520                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
 521                         "driver state");
 522                 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
 523                                        WLAN_REASON_DEAUTH_LEAVING);
 524         }
 525 }
 526
 527
 528 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
 529 {
 530         struct wpa_supplicant *wpa_s = eloop_ctx;
 531         if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
 532                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
 533                 sme_deauth(wpa_s);
 534         }
 535 }
 536
 537
 538 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
 539 {
 540         struct wpa_supplicant *wpa_s = eloop_ctx;
 541         if (wpa_s->wpa_state == WPA_ASSOCIATING) {
 542                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
 543                 sme_deauth(wpa_s);
 544         }
 545 }
 546
 547
 548 void sme_state_changed(struct wpa_supplicant *wpa_s)
 549 {
 550         /* Make sure timers are cleaned up appropriately. */
 551         if (wpa_s->wpa_state != WPA_ASSOCIATING)
 552                 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 553         if (wpa_s->wpa_state != WPA_AUTHENTICATING)
 554                 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 555 }
 556
 557
 558 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
 559                                        const u8 *prev_pending_bssid)
 560 {
 561         /*
 562          * mac80211-workaround to force deauth on failed auth cmd,
 563          * requires us to remain in authenticating state to allow the
 564          * second authentication attempt to be continued properly.
 565          */
 566         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
 567                 "to proceed after disconnection event");
 568         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 569         os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
 570
 571         /*
 572          * Re-arm authentication timer in case auth fails for whatever reason.
 573          */
 574         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 575         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 576                                NULL);
 577 }
 578
 579
 580 void sme_deinit(struct wpa_supplicant *wpa_s)
 581 {
 582         os_free(wpa_s->sme.ft_ies);
 583         wpa_s->sme.ft_ies = NULL;
 584         wpa_s->sme.ft_ies_len = 0;
 585 #ifdef CONFIG_IEEE80211W
 586         sme_stop_sa_query(wpa_s);
 587 #endif /* CONFIG_IEEE80211W */
 588
 589         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 590         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 591 }
 592
 593
 594 #ifdef CONFIG_IEEE80211W
 595
 596 static const unsigned int sa_query_max_timeout = 1000;
 597 static const unsigned int sa_query_retry_timeout = 201;
 598
 599 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
 600 {
 601         u32 tu;
 602         struct os_time now, passed;
 603         os_get_time(&now);
 604         os_time_sub(&now, &wpa_s->sme.sa_query_start, &passed);
 605         tu = (passed.sec * 1000000 + passed.usec) / 1024;
 606         if (sa_query_max_timeout < tu) {
 607                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
 608                 sme_stop_sa_query(wpa_s);
 609                 wpa_supplicant_deauthenticate(
 610                         wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
 611                 return 1;
 612         }
 613
 614         return 0;
 615 }
 616
 617
 618 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
 619                                   const u8 *trans_id)
 620 {
 621         u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
 622         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
 623                 MACSTR, MAC2STR(wpa_s->bssid));
 624         wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
 625                     trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 626         req[0] = WLAN_ACTION_SA_QUERY;
 627         req[1] = WLAN_SA_QUERY_REQUEST;
 628         os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 629         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
 630                                 wpa_s->own_addr, wpa_s->bssid,
 631                                 req, sizeof(req)) < 0)
 632                 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
 633                         "Request");
 634 }
 635
 636
 637 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
 638 {
 639         struct wpa_supplicant *wpa_s = eloop_ctx;
 640         unsigned int timeout, sec, usec;
 641         u8 *trans_id, *nbuf;
 642
 643         if (wpa_s->sme.sa_query_count > 0 &&
 644             sme_check_sa_query_timeout(wpa_s))
 645                 return;
 646
 647         nbuf = os_realloc(wpa_s->sme.sa_query_trans_id,
 648                           (wpa_s->sme.sa_query_count + 1) *
 649                           WLAN_SA_QUERY_TR_ID_LEN);
 650         if (nbuf == NULL)
 651                 return;
 652         if (wpa_s->sme.sa_query_count == 0) {
 653                 /* Starting a new SA Query procedure */
 654                 os_get_time(&wpa_s->sme.sa_query_start);
 655         }
 656         trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
 657         wpa_s->sme.sa_query_trans_id = nbuf;
 658         wpa_s->sme.sa_query_count++;
 659
 660         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 661
 662         timeout = sa_query_retry_timeout;
 663         sec = ((timeout / 1000) * 1024) / 1000;
 664         usec = (timeout % 1000) * 1024;
 665         eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
 666
 667         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
 668                 wpa_s->sme.sa_query_count);
 669
 670         sme_send_sa_query_req(wpa_s, trans_id);
 671 }
 672
 673
 674 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
 675 {
 676         sme_sa_query_timer(wpa_s, NULL);
 677 }
 678
 679
 680 void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
 681 {
 682         eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
 683         os_free(wpa_s->sme.sa_query_trans_id);
 684         wpa_s->sme.sa_query_trans_id = NULL;
 685         wpa_s->sme.sa_query_count = 0;
 686 }
 687
 688
 689 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
 690                                  const u8 *da, u16 reason_code)
 691 {
 692         struct wpa_ssid *ssid;
 693
 694         if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME))
 695                 return;
 696         if (wpa_s->wpa_state != WPA_COMPLETED)
 697                 return;
 698         ssid = wpa_s->current_ssid;
 699         if (ssid == NULL || ssid->ieee80211w == 0)
 700                 return;
 701         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
 702                 return;
 703         if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
 704             reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
 705                 return;
 706         if (wpa_s->sme.sa_query_count > 0)
 707                 return;
 708
 709         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
 710                 "possible AP/STA state mismatch - trigger SA Query");
 711         sme_start_sa_query(wpa_s);
 712 }
 713
 714
 715 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
 716                      const u8 *data, size_t len)
 717 {
 718         int i;
 719
 720         if (wpa_s->sme.sa_query_trans_id == NULL ||
 721             len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
 722             data[0] != WLAN_SA_QUERY_RESPONSE)
 723                 return;
 724         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
 725                 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
 726
 727         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
 728                 return;
 729
 730         for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
 731                 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
 732                               i * WLAN_SA_QUERY_TR_ID_LEN,
 733                               data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
 734                         break;
 735         }
 736
 737         if (i >= wpa_s->sme.sa_query_count) {
 738                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
 739                         "transaction identifier found");
 740                 return;
 741         }
 742
 743         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
 744                 "from " MACSTR, MAC2STR(sa));
 745         sme_stop_sa_query(wpa_s);
 746 }
 747
 748 #endif /* CONFIG_IEEE80211W */