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         params.p2p = ssid->p2p_group;
  76
  77         if (wpa_s->sme.ssid_len != params.ssid_len ||
  78             os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
  79                 wpa_s->sme.prev_bssid_set = 0;
  80
  81         wpa_s->sme.freq = params.freq;
  82         os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
  83         wpa_s->sme.ssid_len = params.ssid_len;
  84
  85         params.auth_alg = WPA_AUTH_ALG_OPEN;
  86 #ifdef IEEE8021X_EAPOL
  87         if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
  88                 if (ssid->leap) {
  89                         if (ssid->non_leap == 0)
  90                                 params.auth_alg = WPA_AUTH_ALG_LEAP;
  91                         else
  92                                 params.auth_alg |= WPA_AUTH_ALG_LEAP;
  93                 }
  94         }
  95 #endif /* IEEE8021X_EAPOL */
  96         wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
  97                 params.auth_alg);
  98         if (ssid->auth_alg) {
  99                 params.auth_alg = ssid->auth_alg;
 100                 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
 101                         "0x%x", params.auth_alg);
 102         }
 103
 104         for (i = 0; i < NUM_WEP_KEYS; i++) {
 105                 if (ssid->wep_key_len[i])
 106                         params.wep_key[i] = ssid->wep_key[i];
 107                 params.wep_key_len[i] = ssid->wep_key_len[i];
 108         }
 109         params.wep_tx_keyidx = ssid->wep_tx_keyidx;
 110
 111         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 112         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 113         os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
 114         if (bssid_changed)
 115                 wpas_notify_bssid_changed(wpa_s);
 116
 117         if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
 118              wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
 119             (ssid->key_mgmt & (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK |
 120                                WPA_KEY_MGMT_FT_IEEE8021X |
 121                                WPA_KEY_MGMT_FT_PSK |
 122                                WPA_KEY_MGMT_IEEE8021X_SHA256 |
 123                                WPA_KEY_MGMT_PSK_SHA256))) {
 124                 int try_opportunistic;
 125                 try_opportunistic = ssid->proactive_key_caching &&
 126                         (ssid->proto & WPA_PROTO_RSN);
 127                 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
 128                                             wpa_s->current_ssid,
 129                                             try_opportunistic) == 0)
 130                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
 131                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 132                 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
 133                                               wpa_s->sme.assoc_req_ie,
 134                                               &wpa_s->sme.assoc_req_ie_len)) {
 135                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 136                                 "key management and encryption suites");
 137                         return;
 138                 }
 139         } else if (ssid->key_mgmt &
 140                    (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
 141                     WPA_KEY_MGMT_WPA_NONE | WPA_KEY_MGMT_FT_PSK |
 142                     WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_PSK_SHA256 |
 143                     WPA_KEY_MGMT_IEEE8021X_SHA256)) {
 144                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 145                 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
 146                                               wpa_s->sme.assoc_req_ie,
 147                                               &wpa_s->sme.assoc_req_ie_len)) {
 148                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 149                                 "key management and encryption suites (no "
 150                                 "scan results)");
 151                         return;
 152                 }
 153 #ifdef CONFIG_WPS
 154         } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 155                 struct wpabuf *wps_ie;
 156                 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
 157                 if (wps_ie && wpabuf_len(wps_ie) <=
 158                     sizeof(wpa_s->sme.assoc_req_ie)) {
 159                         wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
 160                         os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
 161                                   wpa_s->sme.assoc_req_ie_len);
 162                 } else
 163                         wpa_s->sme.assoc_req_ie_len = 0;
 164                 wpabuf_free(wps_ie);
 165                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 166 #endif /* CONFIG_WPS */
 167         } else {
 168                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 169                 wpa_s->sme.assoc_req_ie_len = 0;
 170         }
 171
 172 #ifdef CONFIG_IEEE80211R
 173         ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
 174         if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
 175                 md = ie + 2;
 176         wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
 177         if (md) {
 178                 /* Prepare for the next transition */
 179                 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
 180         }
 181
 182         if (md && ssid->key_mgmt & (WPA_KEY_MGMT_FT_PSK |
 183                                     WPA_KEY_MGMT_FT_IEEE8021X)) {
 184                 if (wpa_s->sme.assoc_req_ie_len + 5 <
 185                     sizeof(wpa_s->sme.assoc_req_ie)) {
 186                         struct rsn_mdie *mdie;
 187                         u8 *pos = wpa_s->sme.assoc_req_ie +
 188                                 wpa_s->sme.assoc_req_ie_len;
 189                         *pos++ = WLAN_EID_MOBILITY_DOMAIN;
 190                         *pos++ = sizeof(*mdie);
 191                         mdie = (struct rsn_mdie *) pos;
 192                         os_memcpy(mdie->mobility_domain, md,
 193                                   MOBILITY_DOMAIN_ID_LEN);
 194                         mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
 195                         wpa_s->sme.assoc_req_ie_len += 5;
 196                 }
 197
 198                 if (wpa_s->sme.ft_used &&
 199                     os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
 200                     wpa_sm_has_ptk(wpa_s->wpa)) {
 201                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT "
 202                                 "over-the-air");
 203                         params.auth_alg = WPA_AUTH_ALG_FT;
 204                         params.ie = wpa_s->sme.ft_ies;
 205                         params.ie_len = wpa_s->sme.ft_ies_len;
 206                 }
 207         }
 208 #endif /* CONFIG_IEEE80211R */
 209
 210 #ifdef CONFIG_IEEE80211W
 211         wpa_s->sme.mfp = ssid->ieee80211w;
 212         if (ssid->ieee80211w != NO_MGMT_FRAME_PROTECTION) {
 213                 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 214                 struct wpa_ie_data _ie;
 215                 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
 216                     _ie.capabilities &
 217                     (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
 218                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
 219                                 "MFP: require MFP");
 220                         wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
 221                 }
 222         }
 223 #endif /* CONFIG_IEEE80211W */
 224
 225 #ifdef CONFIG_P2P
 226         if (wpa_s->global->p2p) {
 227                 u8 *pos;
 228                 size_t len;
 229                 int res;
 230                 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
 231                 len = sizeof(wpa_s->sme.assoc_req_ie) -
 232                         wpa_s->sme.assoc_req_ie_len;
 233                 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
 234                                             ssid->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                 params.wpa_proto = WPA_PROTO_RSN;
 397                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
 398                                         elems.rsn_ie_len + 2);
 399         } else if (elems.wpa_ie) {
 400                 params.wpa_proto = WPA_PROTO_WPA;
 401                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
 402                                         elems.wpa_ie_len + 2);
 403         } else
 404                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 405         if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
 406                 params.p2p = 1;
 407
 408         if (wpa_s->parent->set_sta_uapsd)
 409                 params.uapsd = wpa_s->parent->sta_uapsd;
 410         else
 411                 params.uapsd = -1;
 412
 413         if (wpa_drv_associate(wpa_s, &params) < 0) {
 414                 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
 415                         "driver failed");
 416                 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 417                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 418                 return;
 419         }
 420
 421         eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
 422                                NULL);
 423 }
 424
 425
 426 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
 427                       const u8 *ies, size_t ies_len)
 428 {
 429         if (md == NULL || ies == NULL) {
 430                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
 431                 os_free(wpa_s->sme.ft_ies);
 432                 wpa_s->sme.ft_ies = NULL;
 433                 wpa_s->sme.ft_ies_len = 0;
 434                 wpa_s->sme.ft_used = 0;
 435                 return 0;
 436         }
 437
 438         os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
 439         wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
 440         os_free(wpa_s->sme.ft_ies);
 441         wpa_s->sme.ft_ies = os_malloc(ies_len);
 442         if (wpa_s->sme.ft_ies == NULL)
 443                 return -1;
 444         os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
 445         wpa_s->sme.ft_ies_len = ies_len;
 446         return 0;
 447 }
 448
 449
 450 static void sme_deauth(struct wpa_supplicant *wpa_s)
 451 {
 452         int bssid_changed;
 453
 454         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 455
 456         if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
 457                                    WLAN_REASON_DEAUTH_LEAVING) < 0) {
 458                 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
 459                         "failed");
 460         }
 461         wpa_s->sme.prev_bssid_set = 0;
 462
 463         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 464         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 465         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 466         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 467         if (bssid_changed)
 468                 wpas_notify_bssid_changed(wpa_s);
 469 }
 470
 471
 472 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
 473                             union wpa_event_data *data)
 474 {
 475         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
 476                 "status code %d", MAC2STR(wpa_s->pending_bssid),
 477                 data->assoc_reject.status_code);
 478
 479         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 480
 481         /*
 482          * For now, unconditionally terminate the previous authentication. In
 483          * theory, this should not be needed, but mac80211 gets quite confused
 484          * if the authentication is left pending.. Some roaming cases might
 485          * benefit from using the previous authentication, so this could be
 486          * optimized in the future.
 487          */
 488         sme_deauth(wpa_s);
 489 }
 490
 491
 492 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
 493                               union wpa_event_data *data)
 494 {
 495         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
 496         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 497 }
 498
 499
 500 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
 501                                union wpa_event_data *data)
 502 {
 503         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
 504         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 505         wpa_supplicant_mark_disassoc(wpa_s);
 506 }
 507
 508
 509 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
 510                         union wpa_event_data *data)
 511 {
 512         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
 513         if (wpa_s->sme.prev_bssid_set &&
 514             !(wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)) {
 515                 /*
 516                  * cfg80211/mac80211 can get into somewhat confused state if
 517                  * the AP only disassociates us and leaves us in authenticated
 518                  * state. For now, force the state to be cleared to avoid
 519                  * confusing errors if we try to associate with the AP again.
 520                  */
 521                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
 522                         "driver state");
 523                 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
 524                                        WLAN_REASON_DEAUTH_LEAVING);
 525         }
 526 }
 527
 528
 529 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
 530 {
 531         struct wpa_supplicant *wpa_s = eloop_ctx;
 532         if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
 533                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
 534                 sme_deauth(wpa_s);
 535         }
 536 }
 537
 538
 539 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
 540 {
 541         struct wpa_supplicant *wpa_s = eloop_ctx;
 542         if (wpa_s->wpa_state == WPA_ASSOCIATING) {
 543                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
 544                 sme_deauth(wpa_s);
 545         }
 546 }
 547
 548
 549 void sme_state_changed(struct wpa_supplicant *wpa_s)
 550 {
 551         /* Make sure timers are cleaned up appropriately. */
 552         if (wpa_s->wpa_state != WPA_ASSOCIATING)
 553                 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 554         if (wpa_s->wpa_state != WPA_AUTHENTICATING)
 555                 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 556 }
 557
 558
 559 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
 560                                        const u8 *prev_pending_bssid)
 561 {
 562         /*
 563          * mac80211-workaround to force deauth on failed auth cmd,
 564          * requires us to remain in authenticating state to allow the
 565          * second authentication attempt to be continued properly.
 566          */
 567         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
 568                 "to proceed after disconnection event");
 569         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 570         os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
 571
 572         /*
 573          * Re-arm authentication timer in case auth fails for whatever reason.
 574          */
 575         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 576         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 577                                NULL);
 578 }
 579
 580
 581 void sme_deinit(struct wpa_supplicant *wpa_s)
 582 {
 583         os_free(wpa_s->sme.ft_ies);
 584         wpa_s->sme.ft_ies = NULL;
 585         wpa_s->sme.ft_ies_len = 0;
 586 #ifdef CONFIG_IEEE80211W
 587         sme_stop_sa_query(wpa_s);
 588 #endif /* CONFIG_IEEE80211W */
 589
 590         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 591         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 592 }
 593
 594
 595 #ifdef CONFIG_IEEE80211W
 596
 597 static const unsigned int sa_query_max_timeout = 1000;
 598 static const unsigned int sa_query_retry_timeout = 201;
 599
 600 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
 601 {
 602         u32 tu;
 603         struct os_time now, passed;
 604         os_get_time(&now);
 605         os_time_sub(&now, &wpa_s->sme.sa_query_start, &passed);
 606         tu = (passed.sec * 1000000 + passed.usec) / 1024;
 607         if (sa_query_max_timeout < tu) {
 608                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
 609                 sme_stop_sa_query(wpa_s);
 610                 wpa_supplicant_deauthenticate(
 611                         wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
 612                 return 1;
 613         }
 614
 615         return 0;
 616 }
 617
 618
 619 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
 620                                   const u8 *trans_id)
 621 {
 622         u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
 623         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
 624                 MACSTR, MAC2STR(wpa_s->bssid));
 625         wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
 626                     trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 627         req[0] = WLAN_ACTION_SA_QUERY;
 628         req[1] = WLAN_SA_QUERY_REQUEST;
 629         os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 630         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
 631                                 wpa_s->own_addr, wpa_s->bssid,
 632                                 req, sizeof(req)) < 0)
 633                 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
 634                         "Request");
 635 }
 636
 637
 638 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
 639 {
 640         struct wpa_supplicant *wpa_s = eloop_ctx;
 641         unsigned int timeout, sec, usec;
 642         u8 *trans_id, *nbuf;
 643
 644         if (wpa_s->sme.sa_query_count > 0 &&
 645             sme_check_sa_query_timeout(wpa_s))
 646                 return;
 647
 648         nbuf = os_realloc(wpa_s->sme.sa_query_trans_id,
 649                           (wpa_s->sme.sa_query_count + 1) *
 650                           WLAN_SA_QUERY_TR_ID_LEN);
 651         if (nbuf == NULL)
 652                 return;
 653         if (wpa_s->sme.sa_query_count == 0) {
 654                 /* Starting a new SA Query procedure */
 655                 os_get_time(&wpa_s->sme.sa_query_start);
 656         }
 657         trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
 658         wpa_s->sme.sa_query_trans_id = nbuf;
 659         wpa_s->sme.sa_query_count++;
 660
 661         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 662
 663         timeout = sa_query_retry_timeout;
 664         sec = ((timeout / 1000) * 1024) / 1000;
 665         usec = (timeout % 1000) * 1024;
 666         eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
 667
 668         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
 669                 wpa_s->sme.sa_query_count);
 670
 671         sme_send_sa_query_req(wpa_s, trans_id);
 672 }
 673
 674
 675 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
 676 {
 677         sme_sa_query_timer(wpa_s, NULL);
 678 }
 679
 680
 681 void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
 682 {
 683         eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
 684         os_free(wpa_s->sme.sa_query_trans_id);
 685         wpa_s->sme.sa_query_trans_id = NULL;
 686         wpa_s->sme.sa_query_count = 0;
 687 }
 688
 689
 690 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
 691                                  const u8 *da, u16 reason_code)
 692 {
 693         struct wpa_ssid *ssid;
 694
 695         if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME))
 696                 return;
 697         if (wpa_s->wpa_state != WPA_COMPLETED)
 698                 return;
 699         ssid = wpa_s->current_ssid;
 700         if (ssid == NULL || ssid->ieee80211w == 0)
 701                 return;
 702         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
 703                 return;
 704         if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
 705             reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
 706                 return;
 707         if (wpa_s->sme.sa_query_count > 0)
 708                 return;
 709
 710         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
 711                 "possible AP/STA state mismatch - trigger SA Query");
 712         sme_start_sa_query(wpa_s);
 713 }
 714
 715
 716 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
 717                      const u8 *data, size_t len)
 718 {
 719         int i;
 720
 721         if (wpa_s->sme.sa_query_trans_id == NULL ||
 722             len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
 723             data[0] != WLAN_SA_QUERY_RESPONSE)
 724                 return;
 725         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
 726                 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
 727
 728         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
 729                 return;
 730
 731         for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
 732                 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
 733                               i * WLAN_SA_QUERY_TR_ID_LEN,
 734                               data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
 735                         break;
 736         }
 737
 738         if (i >= wpa_s->sme.sa_query_count) {
 739                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
 740                         "transaction identifier found");
 741                 return;
 742         }
 743
 744         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
 745                 "from " MACSTR, MAC2STR(sa));
 746         sme_stop_sa_query(wpa_s);
 747 }
 748
 749 #endif /* CONFIG_IEEE80211W */