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 "bss.h"
  33 #include "scan.h"
  34 #include "sme.h"
  35
  36 #define SME_AUTH_TIMEOUT 5
  37 #define SME_ASSOC_TIMEOUT 5
  38
  39 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx);
  40 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx);
  41 #ifdef CONFIG_IEEE80211W
  42 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s);
  43 #endif /* CONFIG_IEEE80211W */
  44
  45
  46 void sme_authenticate(struct wpa_supplicant *wpa_s,
  47                       struct wpa_bss *bss, struct wpa_ssid *ssid)
  48 {
  49         struct wpa_driver_auth_params params;
  50         struct wpa_ssid *old_ssid;
  51 #ifdef CONFIG_IEEE80211R
  52         const u8 *ie;
  53 #endif /* CONFIG_IEEE80211R */
  54 #ifdef CONFIG_IEEE80211R
  55         const u8 *md = NULL;
  56 #endif /* CONFIG_IEEE80211R */
  57         int i, bssid_changed;
  58
  59         if (bss == NULL) {
  60                 wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for "
  61                         "the network");
  62                 return;
  63         }
  64
  65         wpa_s->current_bss = bss;
  66
  67         os_memset(&params, 0, sizeof(params));
  68         wpa_s->reassociate = 0;
  69
  70         params.freq = bss->freq;
  71         params.bssid = bss->bssid;
  72         params.ssid = bss->ssid;
  73         params.ssid_len = bss->ssid_len;
  74         params.p2p = ssid->p2p_group;
  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                 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
 230                 len = sizeof(wpa_s->sme.assoc_req_ie) -
 231                         wpa_s->sme.assoc_req_ie_len;
 232                 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
 233                                             ssid->p2p_group);
 234                 if (res >= 0)
 235                         wpa_s->sme.assoc_req_ie_len += res;
 236         }
 237 #endif /* CONFIG_P2P */
 238
 239 #ifdef CONFIG_INTERWORKING
 240         if (wpa_s->conf->interworking) {
 241                 u8 *pos = wpa_s->sme.assoc_req_ie;
 242                 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
 243                         pos += 2 + pos[1];
 244                 os_memmove(pos + 6, pos,
 245                            wpa_s->sme.assoc_req_ie_len -
 246                            (pos - wpa_s->sme.assoc_req_ie));
 247                 wpa_s->sme.assoc_req_ie_len += 6;
 248                 *pos++ = WLAN_EID_EXT_CAPAB;
 249                 *pos++ = 4;
 250                 *pos++ = 0x00;
 251                 *pos++ = 0x00;
 252                 *pos++ = 0x00;
 253                 *pos++ = 0x80; /* Bit 31 - Interworking */
 254         }
 255 #endif /* CONFIG_INTERWORKING */
 256
 257         wpa_supplicant_cancel_sched_scan(wpa_s);
 258         wpa_supplicant_cancel_scan(wpa_s);
 259
 260         wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
 261                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 262                 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
 263
 264         wpa_clear_keys(wpa_s, bss->bssid);
 265         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 266         old_ssid = wpa_s->current_ssid;
 267         wpa_s->current_ssid = ssid;
 268         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
 269         wpa_supplicant_initiate_eapol(wpa_s);
 270         if (old_ssid != wpa_s->current_ssid)
 271                 wpas_notify_network_changed(wpa_s);
 272
 273         wpa_s->sme.auth_alg = params.auth_alg;
 274         if (wpa_drv_authenticate(wpa_s, &params) < 0) {
 275                 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
 276                         "driver failed");
 277                 wpa_supplicant_req_scan(wpa_s, 1, 0);
 278                 return;
 279         }
 280
 281         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 282                                NULL);
 283
 284         /*
 285          * Association will be started based on the authentication event from
 286          * the driver.
 287          */
 288 }
 289
 290
 291 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
 292 {
 293         struct wpa_ssid *ssid = wpa_s->current_ssid;
 294
 295         if (ssid == NULL) {
 296                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 297                         "when network is not selected");
 298                 return;
 299         }
 300
 301         if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
 302                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 303                         "when not in authenticating state");
 304                 return;
 305         }
 306
 307         if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
 308                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
 309                         "unexpected peer " MACSTR,
 310                         MAC2STR(data->auth.peer));
 311                 return;
 312         }
 313
 314         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
 315                 " auth_type=%d status_code=%d",
 316                 MAC2STR(data->auth.peer), data->auth.auth_type,
 317                 data->auth.status_code);
 318         wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
 319                     data->auth.ies, data->auth.ies_len);
 320
 321         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 322
 323         if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
 324                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
 325                         "code %d)", data->auth.status_code);
 326
 327                 if (data->auth.status_code !=
 328                     WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
 329                     wpa_s->sme.auth_alg == data->auth.auth_type ||
 330                     wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
 331                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 332                         return;
 333                 }
 334
 335                 switch (data->auth.auth_type) {
 336                 case WLAN_AUTH_OPEN:
 337                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 338
 339                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
 340                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 341                                                  wpa_s->current_ssid);
 342                         return;
 343
 344                 case WLAN_AUTH_SHARED_KEY:
 345                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
 346
 347                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
 348                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 349                                                  wpa_s->current_ssid);
 350                         return;
 351
 352                 default:
 353                         return;
 354                 }
 355         }
 356
 357 #ifdef CONFIG_IEEE80211R
 358         if (data->auth.auth_type == WLAN_AUTH_FT) {
 359                 union wpa_event_data edata;
 360                 os_memset(&edata, 0, sizeof(edata));
 361                 edata.ft_ies.ies = data->auth.ies;
 362                 edata.ft_ies.ies_len = data->auth.ies_len;
 363                 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
 364                 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
 365         }
 366 #endif /* CONFIG_IEEE80211R */
 367
 368         sme_associate(wpa_s, ssid->mode, data->auth.peer,
 369                       data->auth.auth_type);
 370 }
 371
 372
 373 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
 374                    const u8 *bssid, u16 auth_type)
 375 {
 376         struct wpa_driver_associate_params params;
 377         struct ieee802_11_elems elems;
 378
 379         os_memset(&params, 0, sizeof(params));
 380         params.bssid = bssid;
 381         params.ssid = wpa_s->sme.ssid;
 382         params.ssid_len = wpa_s->sme.ssid_len;
 383         params.freq = wpa_s->sme.freq;
 384         params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
 385                 wpa_s->sme.assoc_req_ie : NULL;
 386         params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
 387         params.pairwise_suite = cipher_suite2driver(wpa_s->pairwise_cipher);
 388         params.group_suite = cipher_suite2driver(wpa_s->group_cipher);
 389 #ifdef CONFIG_IEEE80211R
 390         if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
 391                 params.wpa_ie = wpa_s->sme.ft_ies;
 392                 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
 393         }
 394 #endif /* CONFIG_IEEE80211R */
 395         params.mode = mode;
 396         params.mgmt_frame_protection = wpa_s->sme.mfp;
 397         if (wpa_s->sme.prev_bssid_set)
 398                 params.prev_bssid = wpa_s->sme.prev_bssid;
 399
 400         wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
 401                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 402                 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
 403                 params.freq);
 404
 405         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
 406
 407         if (params.wpa_ie == NULL ||
 408             ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
 409             < 0) {
 410                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
 411                 os_memset(&elems, 0, sizeof(elems));
 412         }
 413         if (elems.rsn_ie) {
 414                 params.wpa_proto = WPA_PROTO_RSN;
 415                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
 416                                         elems.rsn_ie_len + 2);
 417         } else if (elems.wpa_ie) {
 418                 params.wpa_proto = WPA_PROTO_WPA;
 419                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
 420                                         elems.wpa_ie_len + 2);
 421         } else
 422                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 423         if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
 424                 params.p2p = 1;
 425
 426         if (wpa_s->parent->set_sta_uapsd)
 427                 params.uapsd = wpa_s->parent->sta_uapsd;
 428         else
 429                 params.uapsd = -1;
 430
 431         if (wpa_drv_associate(wpa_s, &params) < 0) {
 432                 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
 433                         "driver failed");
 434                 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 435                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 436                 return;
 437         }
 438
 439         eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
 440                                NULL);
 441 }
 442
 443
 444 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
 445                       const u8 *ies, size_t ies_len)
 446 {
 447         if (md == NULL || ies == NULL) {
 448                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
 449                 os_free(wpa_s->sme.ft_ies);
 450                 wpa_s->sme.ft_ies = NULL;
 451                 wpa_s->sme.ft_ies_len = 0;
 452                 wpa_s->sme.ft_used = 0;
 453                 return 0;
 454         }
 455
 456         os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
 457         wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
 458         os_free(wpa_s->sme.ft_ies);
 459         wpa_s->sme.ft_ies = os_malloc(ies_len);
 460         if (wpa_s->sme.ft_ies == NULL)
 461                 return -1;
 462         os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
 463         wpa_s->sme.ft_ies_len = ies_len;
 464         return 0;
 465 }
 466
 467
 468 static void sme_deauth(struct wpa_supplicant *wpa_s)
 469 {
 470         int bssid_changed;
 471
 472         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 473
 474         if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
 475                                    WLAN_REASON_DEAUTH_LEAVING) < 0) {
 476                 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
 477                         "failed");
 478         }
 479         wpa_s->sme.prev_bssid_set = 0;
 480
 481         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 482         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 483         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 484         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 485         if (bssid_changed)
 486                 wpas_notify_bssid_changed(wpa_s);
 487 }
 488
 489
 490 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
 491                             union wpa_event_data *data)
 492 {
 493         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
 494                 "status code %d", MAC2STR(wpa_s->pending_bssid),
 495                 data->assoc_reject.status_code);
 496
 497         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 498
 499         /*
 500          * For now, unconditionally terminate the previous authentication. In
 501          * theory, this should not be needed, but mac80211 gets quite confused
 502          * if the authentication is left pending.. Some roaming cases might
 503          * benefit from using the previous authentication, so this could be
 504          * optimized in the future.
 505          */
 506         sme_deauth(wpa_s);
 507 }
 508
 509
 510 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
 511                               union wpa_event_data *data)
 512 {
 513         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
 514         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 515 }
 516
 517
 518 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
 519                                union wpa_event_data *data)
 520 {
 521         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
 522         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 523         wpa_supplicant_mark_disassoc(wpa_s);
 524 }
 525
 526
 527 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
 528                         union wpa_event_data *data)
 529 {
 530         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
 531         if (wpa_s->sme.prev_bssid_set) {
 532                 /*
 533                  * cfg80211/mac80211 can get into somewhat confused state if
 534                  * the AP only disassociates us and leaves us in authenticated
 535                  * state. For now, force the state to be cleared to avoid
 536                  * confusing errors if we try to associate with the AP again.
 537                  */
 538                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
 539                         "driver state");
 540                 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
 541                                        WLAN_REASON_DEAUTH_LEAVING);
 542         }
 543 }
 544
 545
 546 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
 547 {
 548         struct wpa_supplicant *wpa_s = eloop_ctx;
 549         if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
 550                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
 551                 sme_deauth(wpa_s);
 552         }
 553 }
 554
 555
 556 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
 557 {
 558         struct wpa_supplicant *wpa_s = eloop_ctx;
 559         if (wpa_s->wpa_state == WPA_ASSOCIATING) {
 560                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
 561                 sme_deauth(wpa_s);
 562         }
 563 }
 564
 565
 566 void sme_state_changed(struct wpa_supplicant *wpa_s)
 567 {
 568         /* Make sure timers are cleaned up appropriately. */
 569         if (wpa_s->wpa_state != WPA_ASSOCIATING)
 570                 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 571         if (wpa_s->wpa_state != WPA_AUTHENTICATING)
 572                 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 573 }
 574
 575
 576 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
 577                                        const u8 *prev_pending_bssid)
 578 {
 579         /*
 580          * mac80211-workaround to force deauth on failed auth cmd,
 581          * requires us to remain in authenticating state to allow the
 582          * second authentication attempt to be continued properly.
 583          */
 584         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
 585                 "to proceed after disconnection event");
 586         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 587         os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
 588
 589         /*
 590          * Re-arm authentication timer in case auth fails for whatever reason.
 591          */
 592         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 593         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 594                                NULL);
 595 }
 596
 597
 598 void sme_deinit(struct wpa_supplicant *wpa_s)
 599 {
 600         os_free(wpa_s->sme.ft_ies);
 601         wpa_s->sme.ft_ies = NULL;
 602         wpa_s->sme.ft_ies_len = 0;
 603 #ifdef CONFIG_IEEE80211W
 604         sme_stop_sa_query(wpa_s);
 605 #endif /* CONFIG_IEEE80211W */
 606
 607         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 608         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 609 }
 610
 611
 612 #ifdef CONFIG_IEEE80211W
 613
 614 static const unsigned int sa_query_max_timeout = 1000;
 615 static const unsigned int sa_query_retry_timeout = 201;
 616
 617 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
 618 {
 619         u32 tu;
 620         struct os_time now, passed;
 621         os_get_time(&now);
 622         os_time_sub(&now, &wpa_s->sme.sa_query_start, &passed);
 623         tu = (passed.sec * 1000000 + passed.usec) / 1024;
 624         if (sa_query_max_timeout < tu) {
 625                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
 626                 sme_stop_sa_query(wpa_s);
 627                 wpa_supplicant_deauthenticate(
 628                         wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
 629                 return 1;
 630         }
 631
 632         return 0;
 633 }
 634
 635
 636 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
 637                                   const u8 *trans_id)
 638 {
 639         u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
 640         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
 641                 MACSTR, MAC2STR(wpa_s->bssid));
 642         wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
 643                     trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 644         req[0] = WLAN_ACTION_SA_QUERY;
 645         req[1] = WLAN_SA_QUERY_REQUEST;
 646         os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 647         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
 648                                 wpa_s->own_addr, wpa_s->bssid,
 649                                 req, sizeof(req), 0) < 0)
 650                 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
 651                         "Request");
 652 }
 653
 654
 655 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
 656 {
 657         struct wpa_supplicant *wpa_s = eloop_ctx;
 658         unsigned int timeout, sec, usec;
 659         u8 *trans_id, *nbuf;
 660
 661         if (wpa_s->sme.sa_query_count > 0 &&
 662             sme_check_sa_query_timeout(wpa_s))
 663                 return;
 664
 665         nbuf = os_realloc(wpa_s->sme.sa_query_trans_id,
 666                           (wpa_s->sme.sa_query_count + 1) *
 667                           WLAN_SA_QUERY_TR_ID_LEN);
 668         if (nbuf == NULL)
 669                 return;
 670         if (wpa_s->sme.sa_query_count == 0) {
 671                 /* Starting a new SA Query procedure */
 672                 os_get_time(&wpa_s->sme.sa_query_start);
 673         }
 674         trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
 675         wpa_s->sme.sa_query_trans_id = nbuf;
 676         wpa_s->sme.sa_query_count++;
 677
 678         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 679
 680         timeout = sa_query_retry_timeout;
 681         sec = ((timeout / 1000) * 1024) / 1000;
 682         usec = (timeout % 1000) * 1024;
 683         eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
 684
 685         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
 686                 wpa_s->sme.sa_query_count);
 687
 688         sme_send_sa_query_req(wpa_s, trans_id);
 689 }
 690
 691
 692 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
 693 {
 694         sme_sa_query_timer(wpa_s, NULL);
 695 }
 696
 697
 698 void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
 699 {
 700         eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
 701         os_free(wpa_s->sme.sa_query_trans_id);
 702         wpa_s->sme.sa_query_trans_id = NULL;
 703         wpa_s->sme.sa_query_count = 0;
 704 }
 705
 706
 707 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
 708                                  const u8 *da, u16 reason_code)
 709 {
 710         struct wpa_ssid *ssid;
 711
 712         if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME))
 713                 return;
 714         if (wpa_s->wpa_state != WPA_COMPLETED)
 715                 return;
 716         ssid = wpa_s->current_ssid;
 717         if (ssid == NULL || ssid->ieee80211w == 0)
 718                 return;
 719         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
 720                 return;
 721         if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
 722             reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
 723                 return;
 724         if (wpa_s->sme.sa_query_count > 0)
 725                 return;
 726
 727         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
 728                 "possible AP/STA state mismatch - trigger SA Query");
 729         sme_start_sa_query(wpa_s);
 730 }
 731
 732
 733 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
 734                      const u8 *data, size_t len)
 735 {
 736         int i;
 737
 738         if (wpa_s->sme.sa_query_trans_id == NULL ||
 739             len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
 740             data[0] != WLAN_SA_QUERY_RESPONSE)
 741                 return;
 742         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
 743                 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
 744
 745         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
 746                 return;
 747
 748         for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
 749                 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
 750                               i * WLAN_SA_QUERY_TR_ID_LEN,
 751                               data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
 752                         break;
 753         }
 754
 755         if (i >= wpa_s->sme.sa_query_count) {
 756                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
 757                         "transaction identifier found");
 758                 return;
 759         }
 760
 761         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
 762                 "from " MACSTR, MAC2STR(sa));
 763         sme_stop_sa_query(wpa_s);
 764 }
 765
 766 #endif /* CONFIG_IEEE80211W */