wpa_supplicant/sme.c

   1 /*
   2  * wpa_supplicant - SME
   3  * Copyright (c) 2009-2010, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "includes.h"
  10
  11 #include "common.h"
  12 #include "utils/eloop.h"
  13 #include "common/ieee802_11_defs.h"
  14 #include "common/ieee802_11_common.h"
  15 #include "eapol_supp/eapol_supp_sm.h"
  16 #include "common/wpa_common.h"
  17 #include "rsn_supp/wpa.h"
  18 #include "rsn_supp/pmksa_cache.h"
  19 #include "config.h"
  20 #include "wpa_supplicant_i.h"
  21 #include "driver_i.h"
  22 #include "wpas_glue.h"
  23 #include "wps_supplicant.h"
  24 #include "p2p_supplicant.h"
  25 #include "notify.h"
  26 #include "bss.h"
  27 #include "scan.h"
  28 #include "sme.h"
  29 #include "hs20_supplicant.h"
  30
  31 #define SME_AUTH_TIMEOUT 5
  32 #define SME_ASSOC_TIMEOUT 5
  33
  34 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx);
  35 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx);
  36 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx);
  37 #ifdef CONFIG_IEEE80211W
  38 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s);
  39 #endif /* CONFIG_IEEE80211W */
  40
  41
  42 void sme_authenticate(struct wpa_supplicant *wpa_s,
  43                       struct wpa_bss *bss, struct wpa_ssid *ssid)
  44 {
  45         struct wpa_driver_auth_params params;
  46         struct wpa_ssid *old_ssid;
  47 #ifdef CONFIG_IEEE80211R
  48         const u8 *ie;
  49 #endif /* CONFIG_IEEE80211R */
  50 #ifdef CONFIG_IEEE80211R
  51         const u8 *md = NULL;
  52 #endif /* CONFIG_IEEE80211R */
  53         int i, bssid_changed;
  54
  55         if (bss == NULL) {
  56                 wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for "
  57                         "the network");
  58                 return;
  59         }
  60
  61         wpa_s->current_bss = bss;
  62
  63         os_memset(&params, 0, sizeof(params));
  64         wpa_s->reassociate = 0;
  65
  66         params.freq = bss->freq;
  67         params.bssid = bss->bssid;
  68         params.ssid = bss->ssid;
  69         params.ssid_len = bss->ssid_len;
  70         params.p2p = ssid->p2p_group;
  71
  72         if (wpa_s->sme.ssid_len != params.ssid_len ||
  73             os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
  74                 wpa_s->sme.prev_bssid_set = 0;
  75
  76         wpa_s->sme.freq = params.freq;
  77         os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
  78         wpa_s->sme.ssid_len = params.ssid_len;
  79
  80         params.auth_alg = WPA_AUTH_ALG_OPEN;
  81 #ifdef IEEE8021X_EAPOL
  82         if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
  83                 if (ssid->leap) {
  84                         if (ssid->non_leap == 0)
  85                                 params.auth_alg = WPA_AUTH_ALG_LEAP;
  86                         else
  87                                 params.auth_alg |= WPA_AUTH_ALG_LEAP;
  88                 }
  89         }
  90 #endif /* IEEE8021X_EAPOL */
  91         wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
  92                 params.auth_alg);
  93         if (ssid->auth_alg) {
  94                 params.auth_alg = ssid->auth_alg;
  95                 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
  96                         "0x%x", params.auth_alg);
  97         }
  98
  99         for (i = 0; i < NUM_WEP_KEYS; i++) {
 100                 if (ssid->wep_key_len[i])
 101                         params.wep_key[i] = ssid->wep_key[i];
 102                 params.wep_key_len[i] = ssid->wep_key_len[i];
 103         }
 104         params.wep_tx_keyidx = ssid->wep_tx_keyidx;
 105
 106         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 107         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 108         os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
 109         if (bssid_changed)
 110                 wpas_notify_bssid_changed(wpa_s);
 111
 112         if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
 113              wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
 114             wpa_key_mgmt_wpa(ssid->key_mgmt)) {
 115                 int try_opportunistic;
 116                 try_opportunistic = ssid->proactive_key_caching &&
 117                         (ssid->proto & WPA_PROTO_RSN);
 118                 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
 119                                             wpa_s->current_ssid,
 120                                             try_opportunistic) == 0)
 121                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
 122                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 123                 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
 124                                               wpa_s->sme.assoc_req_ie,
 125                                               &wpa_s->sme.assoc_req_ie_len)) {
 126                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 127                                 "key management and encryption suites");
 128                         return;
 129                 }
 130         } else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
 131                    wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) {
 132                 /*
 133                  * Both WPA and non-WPA IEEE 802.1X enabled in configuration -
 134                  * use non-WPA since the scan results did not indicate that the
 135                  * AP is using WPA or WPA2.
 136                  */
 137                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 138                 wpa_s->sme.assoc_req_ie_len = 0;
 139         } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
 140                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 141                 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
 142                                               wpa_s->sme.assoc_req_ie,
 143                                               &wpa_s->sme.assoc_req_ie_len)) {
 144                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 145                                 "key management and encryption suites (no "
 146                                 "scan results)");
 147                         return;
 148                 }
 149 #ifdef CONFIG_WPS
 150         } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 151                 struct wpabuf *wps_ie;
 152                 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
 153                 if (wps_ie && wpabuf_len(wps_ie) <=
 154                     sizeof(wpa_s->sme.assoc_req_ie)) {
 155                         wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
 156                         os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
 157                                   wpa_s->sme.assoc_req_ie_len);
 158                 } else
 159                         wpa_s->sme.assoc_req_ie_len = 0;
 160                 wpabuf_free(wps_ie);
 161                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 162 #endif /* CONFIG_WPS */
 163         } else {
 164                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 165                 wpa_s->sme.assoc_req_ie_len = 0;
 166         }
 167
 168 #ifdef CONFIG_IEEE80211R
 169         ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
 170         if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
 171                 md = ie + 2;
 172         wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
 173         if (md) {
 174                 /* Prepare for the next transition */
 175                 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
 176         }
 177
 178         if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) {
 179                 if (wpa_s->sme.assoc_req_ie_len + 5 <
 180                     sizeof(wpa_s->sme.assoc_req_ie)) {
 181                         struct rsn_mdie *mdie;
 182                         u8 *pos = wpa_s->sme.assoc_req_ie +
 183                                 wpa_s->sme.assoc_req_ie_len;
 184                         *pos++ = WLAN_EID_MOBILITY_DOMAIN;
 185                         *pos++ = sizeof(*mdie);
 186                         mdie = (struct rsn_mdie *) pos;
 187                         os_memcpy(mdie->mobility_domain, md,
 188                                   MOBILITY_DOMAIN_ID_LEN);
 189                         mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
 190                         wpa_s->sme.assoc_req_ie_len += 5;
 191                 }
 192
 193                 if (wpa_s->sme.ft_used &&
 194                     os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
 195                     wpa_sm_has_ptk(wpa_s->wpa)) {
 196                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT "
 197                                 "over-the-air");
 198                         params.auth_alg = WPA_AUTH_ALG_FT;
 199                         params.ie = wpa_s->sme.ft_ies;
 200                         params.ie_len = wpa_s->sme.ft_ies_len;
 201                 }
 202         }
 203 #endif /* CONFIG_IEEE80211R */
 204
 205 #ifdef CONFIG_IEEE80211W
 206         wpa_s->sme.mfp = ssid->ieee80211w;
 207         if (ssid->ieee80211w != NO_MGMT_FRAME_PROTECTION) {
 208                 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 209                 struct wpa_ie_data _ie;
 210                 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
 211                     _ie.capabilities &
 212                     (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
 213                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
 214                                 "MFP: require MFP");
 215                         wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
 216                 }
 217         }
 218 #endif /* CONFIG_IEEE80211W */
 219
 220 #ifdef CONFIG_P2P
 221         if (wpa_s->global->p2p) {
 222                 u8 *pos;
 223                 size_t len;
 224                 int res;
 225                 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
 226                 len = sizeof(wpa_s->sme.assoc_req_ie) -
 227                         wpa_s->sme.assoc_req_ie_len;
 228                 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
 229                                             ssid->p2p_group);
 230                 if (res >= 0)
 231                         wpa_s->sme.assoc_req_ie_len += res;
 232         }
 233 #endif /* CONFIG_P2P */
 234
 235 #ifdef CONFIG_HS20
 236         if (wpa_s->conf->hs20) {
 237                 struct wpabuf *hs20;
 238                 hs20 = wpabuf_alloc(20);
 239                 if (hs20) {
 240                         wpas_hs20_add_indication(hs20);
 241                         os_memcpy(wpa_s->sme.assoc_req_ie +
 242                                   wpa_s->sme.assoc_req_ie_len,
 243                                   wpabuf_head(hs20), wpabuf_len(hs20));
 244                         wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
 245                         wpabuf_free(hs20);
 246                 }
 247         }
 248 #endif /* CONFIG_HS20 */
 249
 250 #ifdef CONFIG_INTERWORKING
 251         if (wpa_s->conf->interworking) {
 252                 u8 *pos = wpa_s->sme.assoc_req_ie;
 253                 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
 254                         pos += 2 + pos[1];
 255                 os_memmove(pos + 6, pos,
 256                            wpa_s->sme.assoc_req_ie_len -
 257                            (pos - wpa_s->sme.assoc_req_ie));
 258                 wpa_s->sme.assoc_req_ie_len += 6;
 259                 *pos++ = WLAN_EID_EXT_CAPAB;
 260                 *pos++ = 4;
 261                 *pos++ = 0x00;
 262                 *pos++ = 0x00;
 263                 *pos++ = 0x00;
 264                 *pos++ = 0x80; /* Bit 31 - Interworking */
 265         }
 266 #endif /* CONFIG_INTERWORKING */
 267
 268         wpa_supplicant_cancel_sched_scan(wpa_s);
 269         wpa_supplicant_cancel_scan(wpa_s);
 270
 271         wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
 272                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 273                 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
 274
 275         wpa_clear_keys(wpa_s, bss->bssid);
 276         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 277         old_ssid = wpa_s->current_ssid;
 278         wpa_s->current_ssid = ssid;
 279         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
 280         wpa_supplicant_initiate_eapol(wpa_s);
 281         if (old_ssid != wpa_s->current_ssid)
 282                 wpas_notify_network_changed(wpa_s);
 283
 284         wpa_s->sme.auth_alg = params.auth_alg;
 285         if (wpa_drv_authenticate(wpa_s, &params) < 0) {
 286                 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
 287                         "driver failed");
 288                 wpas_connection_failed(wpa_s, bss->bssid);
 289                 wpa_supplicant_mark_disassoc(wpa_s);
 290                 return;
 291         }
 292
 293         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 294                                NULL);
 295
 296         /*
 297          * Association will be started based on the authentication event from
 298          * the driver.
 299          */
 300 }
 301
 302
 303 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
 304 {
 305         struct wpa_ssid *ssid = wpa_s->current_ssid;
 306
 307         if (ssid == NULL) {
 308                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 309                         "when network is not selected");
 310                 return;
 311         }
 312
 313         if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
 314                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 315                         "when not in authenticating state");
 316                 return;
 317         }
 318
 319         if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
 320                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
 321                         "unexpected peer " MACSTR,
 322                         MAC2STR(data->auth.peer));
 323                 return;
 324         }
 325
 326         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
 327                 " auth_type=%d status_code=%d",
 328                 MAC2STR(data->auth.peer), data->auth.auth_type,
 329                 data->auth.status_code);
 330         wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
 331                     data->auth.ies, data->auth.ies_len);
 332
 333         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 334
 335         if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
 336                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
 337                         "code %d)", data->auth.status_code);
 338
 339                 if (data->auth.status_code !=
 340                     WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
 341                     wpa_s->sme.auth_alg == data->auth.auth_type ||
 342                     wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
 343                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 344                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 345                         return;
 346                 }
 347
 348                 switch (data->auth.auth_type) {
 349                 case WLAN_AUTH_OPEN:
 350                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 351
 352                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
 353                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 354                                                  wpa_s->current_ssid);
 355                         return;
 356
 357                 case WLAN_AUTH_SHARED_KEY:
 358                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
 359
 360                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
 361                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 362                                                  wpa_s->current_ssid);
 363                         return;
 364
 365                 default:
 366                         return;
 367                 }
 368         }
 369
 370 #ifdef CONFIG_IEEE80211R
 371         if (data->auth.auth_type == WLAN_AUTH_FT) {
 372                 union wpa_event_data edata;
 373                 os_memset(&edata, 0, sizeof(edata));
 374                 edata.ft_ies.ies = data->auth.ies;
 375                 edata.ft_ies.ies_len = data->auth.ies_len;
 376                 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
 377                 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
 378         }
 379 #endif /* CONFIG_IEEE80211R */
 380
 381         sme_associate(wpa_s, ssid->mode, data->auth.peer,
 382                       data->auth.auth_type);
 383 }
 384
 385
 386 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
 387                    const u8 *bssid, u16 auth_type)
 388 {
 389         struct wpa_driver_associate_params params;
 390         struct ieee802_11_elems elems;
 391 #ifdef CONFIG_HT_OVERRIDES
 392         struct ieee80211_ht_capabilities htcaps;
 393         struct ieee80211_ht_capabilities htcaps_mask;
 394 #endif /* CONFIG_HT_OVERRIDES */
 395
 396         os_memset(&params, 0, sizeof(params));
 397         params.bssid = bssid;
 398         params.ssid = wpa_s->sme.ssid;
 399         params.ssid_len = wpa_s->sme.ssid_len;
 400         params.freq = wpa_s->sme.freq;
 401         params.bg_scan_period = wpa_s->current_ssid ?
 402                 wpa_s->current_ssid->bg_scan_period : -1;
 403         params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
 404                 wpa_s->sme.assoc_req_ie : NULL;
 405         params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
 406         params.pairwise_suite = cipher_suite2driver(wpa_s->pairwise_cipher);
 407         params.group_suite = cipher_suite2driver(wpa_s->group_cipher);
 408 #ifdef CONFIG_HT_OVERRIDES
 409         os_memset(&htcaps, 0, sizeof(htcaps));
 410         os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
 411         params.htcaps = (u8 *) &htcaps;
 412         params.htcaps_mask = (u8 *) &htcaps_mask;
 413         wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, &params);
 414 #endif /* CONFIG_HT_OVERRIDES */
 415 #ifdef CONFIG_IEEE80211R
 416         if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
 417                 params.wpa_ie = wpa_s->sme.ft_ies;
 418                 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
 419         }
 420 #endif /* CONFIG_IEEE80211R */
 421         params.mode = mode;
 422         params.mgmt_frame_protection = wpa_s->sme.mfp;
 423         if (wpa_s->sme.prev_bssid_set)
 424                 params.prev_bssid = wpa_s->sme.prev_bssid;
 425
 426         wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
 427                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 428                 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
 429                 params.freq);
 430
 431         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
 432
 433         if (params.wpa_ie == NULL ||
 434             ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
 435             < 0) {
 436                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
 437                 os_memset(&elems, 0, sizeof(elems));
 438         }
 439         if (elems.rsn_ie) {
 440                 params.wpa_proto = WPA_PROTO_RSN;
 441                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
 442                                         elems.rsn_ie_len + 2);
 443         } else if (elems.wpa_ie) {
 444                 params.wpa_proto = WPA_PROTO_WPA;
 445                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
 446                                         elems.wpa_ie_len + 2);
 447         } else
 448                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 449         if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
 450                 params.p2p = 1;
 451
 452         if (wpa_s->parent->set_sta_uapsd)
 453                 params.uapsd = wpa_s->parent->sta_uapsd;
 454         else
 455                 params.uapsd = -1;
 456
 457         if (wpa_drv_associate(wpa_s, &params) < 0) {
 458                 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
 459                         "driver failed");
 460                 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 461                 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 462                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 463                 return;
 464         }
 465
 466         eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
 467                                NULL);
 468 }
 469
 470
 471 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
 472                       const u8 *ies, size_t ies_len)
 473 {
 474         if (md == NULL || ies == NULL) {
 475                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
 476                 os_free(wpa_s->sme.ft_ies);
 477                 wpa_s->sme.ft_ies = NULL;
 478                 wpa_s->sme.ft_ies_len = 0;
 479                 wpa_s->sme.ft_used = 0;
 480                 return 0;
 481         }
 482
 483         os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
 484         wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
 485         os_free(wpa_s->sme.ft_ies);
 486         wpa_s->sme.ft_ies = os_malloc(ies_len);
 487         if (wpa_s->sme.ft_ies == NULL)
 488                 return -1;
 489         os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
 490         wpa_s->sme.ft_ies_len = ies_len;
 491         return 0;
 492 }
 493
 494
 495 static void sme_deauth(struct wpa_supplicant *wpa_s)
 496 {
 497         int bssid_changed;
 498
 499         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 500
 501         if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
 502                                    WLAN_REASON_DEAUTH_LEAVING) < 0) {
 503                 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
 504                         "failed");
 505         }
 506         wpa_s->sme.prev_bssid_set = 0;
 507
 508         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 509         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 510         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 511         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 512         if (bssid_changed)
 513                 wpas_notify_bssid_changed(wpa_s);
 514 }
 515
 516
 517 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
 518                             union wpa_event_data *data)
 519 {
 520         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
 521                 "status code %d", MAC2STR(wpa_s->pending_bssid),
 522                 data->assoc_reject.status_code);
 523
 524         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 525
 526         /*
 527          * For now, unconditionally terminate the previous authentication. In
 528          * theory, this should not be needed, but mac80211 gets quite confused
 529          * if the authentication is left pending.. Some roaming cases might
 530          * benefit from using the previous authentication, so this could be
 531          * optimized in the future.
 532          */
 533         sme_deauth(wpa_s);
 534 }
 535
 536
 537 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
 538                               union wpa_event_data *data)
 539 {
 540         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
 541         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 542         wpa_supplicant_mark_disassoc(wpa_s);
 543 }
 544
 545
 546 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
 547                                union wpa_event_data *data)
 548 {
 549         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
 550         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 551         wpa_supplicant_mark_disassoc(wpa_s);
 552 }
 553
 554
 555 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
 556                         union wpa_event_data *data)
 557 {
 558         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
 559         if (wpa_s->sme.prev_bssid_set) {
 560                 /*
 561                  * cfg80211/mac80211 can get into somewhat confused state if
 562                  * the AP only disassociates us and leaves us in authenticated
 563                  * state. For now, force the state to be cleared to avoid
 564                  * confusing errors if we try to associate with the AP again.
 565                  */
 566                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
 567                         "driver state");
 568                 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
 569                                        WLAN_REASON_DEAUTH_LEAVING);
 570         }
 571 }
 572
 573
 574 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
 575 {
 576         struct wpa_supplicant *wpa_s = eloop_ctx;
 577         if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
 578                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
 579                 sme_deauth(wpa_s);
 580         }
 581 }
 582
 583
 584 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
 585 {
 586         struct wpa_supplicant *wpa_s = eloop_ctx;
 587         if (wpa_s->wpa_state == WPA_ASSOCIATING) {
 588                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
 589                 sme_deauth(wpa_s);
 590         }
 591 }
 592
 593
 594 void sme_state_changed(struct wpa_supplicant *wpa_s)
 595 {
 596         /* Make sure timers are cleaned up appropriately. */
 597         if (wpa_s->wpa_state != WPA_ASSOCIATING)
 598                 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 599         if (wpa_s->wpa_state != WPA_AUTHENTICATING)
 600                 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 601 }
 602
 603
 604 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
 605                                        const u8 *prev_pending_bssid)
 606 {
 607         /*
 608          * mac80211-workaround to force deauth on failed auth cmd,
 609          * requires us to remain in authenticating state to allow the
 610          * second authentication attempt to be continued properly.
 611          */
 612         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
 613                 "to proceed after disconnection event");
 614         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 615         os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
 616
 617         /*
 618          * Re-arm authentication timer in case auth fails for whatever reason.
 619          */
 620         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 621         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 622                                NULL);
 623 }
 624
 625
 626 void sme_deinit(struct wpa_supplicant *wpa_s)
 627 {
 628         os_free(wpa_s->sme.ft_ies);
 629         wpa_s->sme.ft_ies = NULL;
 630         wpa_s->sme.ft_ies_len = 0;
 631 #ifdef CONFIG_IEEE80211W
 632         sme_stop_sa_query(wpa_s);
 633 #endif /* CONFIG_IEEE80211W */
 634
 635         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 636         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 637         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
 638 }
 639
 640
 641 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
 642                                    const u8 *chan_list, u8 num_channels,
 643                                    u8 num_intol)
 644 {
 645         struct ieee80211_2040_bss_coex_ie *bc_ie;
 646         struct ieee80211_2040_intol_chan_report *ic_report;
 647         struct wpabuf *buf;
 648
 649         wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR,
 650                    MAC2STR(wpa_s->bssid));
 651
 652         buf = wpabuf_alloc(2 + /* action.category + action_code */
 653                            sizeof(struct ieee80211_2040_bss_coex_ie) +
 654                            sizeof(struct ieee80211_2040_intol_chan_report) +
 655                            num_channels);
 656         if (buf == NULL)
 657                 return;
 658
 659         wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
 660         wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
 661
 662         bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
 663         bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
 664         bc_ie->length = 1;
 665         if (num_intol)
 666                 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
 667
 668         if (num_channels > 0) {
 669                 ic_report = wpabuf_put(buf, sizeof(*ic_report));
 670                 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
 671                 ic_report->length = num_channels + 1;
 672                 ic_report->op_class = 0;
 673                 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
 674                           num_channels);
 675         }
 676
 677         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
 678                                 wpa_s->own_addr, wpa_s->bssid,
 679                                 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
 680                 wpa_msg(wpa_s, MSG_INFO,
 681                         "SME: Failed to send 20/40 BSS Coexistence frame");
 682         }
 683
 684         wpabuf_free(buf);
 685 }
 686
 687
 688 /**
 689  * enum wpas_band - Frequency band
 690  * @WPAS_BAND_2GHZ: 2.4 GHz ISM band
 691  * @WPAS_BAND_5GHZ: around 5 GHz band (4.9 - 5.7 GHz)
 692  */
 693 enum wpas_band {
 694         WPAS_BAND_2GHZ,
 695         WPAS_BAND_5GHZ,
 696         WPAS_BAND_INVALID
 697 };
 698
 699 /**
 700  * freq_to_channel - Convert frequency into channel info
 701  * @channel: Buffer for returning channel number
 702  * Returns: Band (2 or 5 GHz)
 703  */
 704 static enum wpas_band freq_to_channel(int freq, u8 *channel)
 705 {
 706         enum wpas_band band = (freq <= 2484) ? WPAS_BAND_2GHZ : WPAS_BAND_5GHZ;
 707         u8 chan = 0;
 708
 709         if (freq >= 2412 && freq <= 2472)
 710                 chan = (freq - 2407) / 5;
 711         else if (freq == 2484)
 712                 chan = 14;
 713         else if (freq >= 5180 && freq <= 5805)
 714                 chan = (freq - 5000) / 5;
 715
 716         *channel = chan;
 717         return band;
 718 }
 719
 720
 721 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
 722 {
 723         struct wpa_bss *bss;
 724         const u8 *ie;
 725         u16 ht_cap;
 726         u8 chan_list[P2P_MAX_CHANNELS], channel;
 727         u8 num_channels = 0, num_intol = 0, i;
 728
 729         if (!wpa_s->sme.sched_obss_scan)
 730                 return 0;
 731
 732         wpa_s->sme.sched_obss_scan = 0;
 733         if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
 734                 return 1;
 735
 736         /*
 737          * Check whether AP uses regulatory triplet or channel triplet in
 738          * country info. Right now the operating class of the BSS channel
 739          * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
 740          * based on the assumption that operating class triplet is not used in
 741          * beacon frame. If the First Channel Number/Operating Extension
 742          * Identifier octet has a positive integer value of 201 or greater,
 743          * then its operating class triplet.
 744          *
 745          * TODO: If Supported Operating Classes element is present in beacon
 746          * frame, have to lookup operating class in Annex E and fill them in
 747          * 2040 coex frame.
 748          */
 749         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
 750         if (ie && (ie[1] >= 6) && (ie[5] >= 201))
 751                 return 1;
 752
 753         os_memset(chan_list, 0, sizeof(chan_list));
 754
 755         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
 756                 /* Skip other band bss */
 757                 if (freq_to_channel(bss->freq, &channel) != WPAS_BAND_2GHZ)
 758                         continue;
 759
 760                 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
 761                 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
 762
 763                 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
 764                         /* Check whether the channel is already considered */
 765                         for (i = 0; i < num_channels; i++) {
 766                                 if (channel == chan_list[i])
 767                                         break;
 768                         }
 769                         if (i != num_channels)
 770                                 continue;
 771
 772                         if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
 773                                 num_intol++;
 774
 775                         chan_list[num_channels++] = channel;
 776                 }
 777         }
 778
 779         sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
 780         return 1;
 781 }
 782
 783
 784 static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
 785                                           u16 num_modes,
 786                                           enum hostapd_hw_mode mode)
 787 {
 788         u16 i;
 789
 790         for (i = 0; i < num_modes; i++) {
 791                 if (modes[i].mode == mode)
 792                         return &modes[i];
 793         }
 794
 795         return NULL;
 796 }
 797
 798
 799 static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s,
 800                                         enum hostapd_hw_mode band,
 801                                         struct wpa_driver_scan_params *params)
 802 {
 803         /* Include only supported channels for the specified band */
 804         struct hostapd_hw_modes *mode;
 805         int count, i;
 806
 807         mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band);
 808         if (mode == NULL) {
 809                 /* No channels supported in this band - use empty list */
 810                 params->freqs = os_zalloc(sizeof(int));
 811                 return;
 812         }
 813
 814         params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
 815         if (params->freqs == NULL)
 816                 return;
 817         for (count = 0, i = 0; i < mode->num_channels; i++) {
 818                 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
 819                         continue;
 820                 params->freqs[count++] = mode->channels[i].freq;
 821         }
 822 }
 823
 824
 825 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
 826 {
 827         struct wpa_supplicant *wpa_s = eloop_ctx;
 828         struct wpa_driver_scan_params params;
 829
 830         if (!wpa_s->current_bss) {
 831                 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
 832                 return;
 833         }
 834
 835         os_memset(&params, 0, sizeof(params));
 836         wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G, &params);
 837         wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
 838
 839         if (wpa_supplicant_trigger_scan(wpa_s, &params))
 840                 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
 841         else
 842                 wpa_s->sme.sched_obss_scan = 1;
 843         os_free(params.freqs);
 844
 845         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
 846                                sme_obss_scan_timeout, wpa_s, NULL);
 847 }
 848
 849
 850 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
 851 {
 852         const u8 *ie;
 853         struct wpa_bss *bss = wpa_s->current_bss;
 854         struct wpa_ssid *ssid = wpa_s->current_ssid;
 855         struct hostapd_hw_modes *hw_mode = NULL;
 856         int i;
 857
 858         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
 859         wpa_s->sme.sched_obss_scan = 0;
 860         if (!enable)
 861                 return;
 862
 863         if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) || ssid == NULL ||
 864             ssid->mode != IEEE80211_MODE_INFRA)
 865                 return; /* Not using station SME in wpa_supplicant */
 866
 867         if (!wpa_s->hw.modes)
 868                 return;
 869
 870         /* only HT caps in 11g mode are relevant */
 871         for (i = 0; i < wpa_s->hw.num_modes; i++) {
 872                 hw_mode = &wpa_s->hw.modes[i];
 873                 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
 874                         break;
 875         }
 876
 877         /* Driver does not support HT40 for 11g or doesn't have 11g. */
 878         if (i == wpa_s->hw.num_modes || !hw_mode ||
 879             !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
 880                 return;
 881
 882         if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
 883                 return; /* Not associated on 2.4 GHz band */
 884
 885         /* Check whether AP supports HT40 */
 886         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
 887         if (!ie || ie[1] < 2 ||
 888             !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
 889                 return; /* AP does not support HT40 */
 890
 891         ie = wpa_bss_get_ie(wpa_s->current_bss,
 892                             WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
 893         if (!ie || ie[1] < 14)
 894                 return; /* AP does not request OBSS scans */
 895
 896         wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
 897         if (wpa_s->sme.obss_scan_int < 10) {
 898                 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
 899                            "replaced with the minimum 10 sec",
 900                            wpa_s->sme.obss_scan_int);
 901                 wpa_s->sme.obss_scan_int = 10;
 902         }
 903         wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
 904                    wpa_s->sme.obss_scan_int);
 905         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
 906                                sme_obss_scan_timeout, wpa_s, NULL);
 907 }
 908
 909
 910 #ifdef CONFIG_IEEE80211W
 911
 912 static const unsigned int sa_query_max_timeout = 1000;
 913 static const unsigned int sa_query_retry_timeout = 201;
 914
 915 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
 916 {
 917         u32 tu;
 918         struct os_time now, passed;
 919         os_get_time(&now);
 920         os_time_sub(&now, &wpa_s->sme.sa_query_start, &passed);
 921         tu = (passed.sec * 1000000 + passed.usec) / 1024;
 922         if (sa_query_max_timeout < tu) {
 923                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
 924                 sme_stop_sa_query(wpa_s);
 925                 wpa_supplicant_deauthenticate(
 926                         wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
 927                 return 1;
 928         }
 929
 930         return 0;
 931 }
 932
 933
 934 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
 935                                   const u8 *trans_id)
 936 {
 937         u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
 938         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
 939                 MACSTR, MAC2STR(wpa_s->bssid));
 940         wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
 941                     trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 942         req[0] = WLAN_ACTION_SA_QUERY;
 943         req[1] = WLAN_SA_QUERY_REQUEST;
 944         os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 945         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
 946                                 wpa_s->own_addr, wpa_s->bssid,
 947                                 req, sizeof(req), 0) < 0)
 948                 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
 949                         "Request");
 950 }
 951
 952
 953 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
 954 {
 955         struct wpa_supplicant *wpa_s = eloop_ctx;
 956         unsigned int timeout, sec, usec;
 957         u8 *trans_id, *nbuf;
 958
 959         if (wpa_s->sme.sa_query_count > 0 &&
 960             sme_check_sa_query_timeout(wpa_s))
 961                 return;
 962
 963         nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
 964                                 wpa_s->sme.sa_query_count + 1,
 965                                 WLAN_SA_QUERY_TR_ID_LEN);
 966         if (nbuf == NULL)
 967                 return;
 968         if (wpa_s->sme.sa_query_count == 0) {
 969                 /* Starting a new SA Query procedure */
 970                 os_get_time(&wpa_s->sme.sa_query_start);
 971         }
 972         trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
 973         wpa_s->sme.sa_query_trans_id = nbuf;
 974         wpa_s->sme.sa_query_count++;
 975
 976         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 977
 978         timeout = sa_query_retry_timeout;
 979         sec = ((timeout / 1000) * 1024) / 1000;
 980         usec = (timeout % 1000) * 1024;
 981         eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
 982
 983         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
 984                 wpa_s->sme.sa_query_count);
 985
 986         sme_send_sa_query_req(wpa_s, trans_id);
 987 }
 988
 989
 990 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
 991 {
 992         sme_sa_query_timer(wpa_s, NULL);
 993 }
 994
 995
 996 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
 997 {
 998         eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
 999         os_free(wpa_s->sme.sa_query_trans_id);
1000         wpa_s->sme.sa_query_trans_id = NULL;
1001         wpa_s->sme.sa_query_count = 0;
1002 }
1003
1004
1005 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1006                                  const u8 *da, u16 reason_code)
1007 {
1008         struct wpa_ssid *ssid;
1009
1010         if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME))
1011                 return;
1012         if (wpa_s->wpa_state != WPA_COMPLETED)
1013                 return;
1014         ssid = wpa_s->current_ssid;
1015         if (ssid == NULL || ssid->ieee80211w == 0)
1016                 return;
1017         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1018                 return;
1019         if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1020             reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1021                 return;
1022         if (wpa_s->sme.sa_query_count > 0)
1023                 return;
1024
1025         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1026                 "possible AP/STA state mismatch - trigger SA Query");
1027         sme_start_sa_query(wpa_s);
1028 }
1029
1030
1031 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1032                      const u8 *data, size_t len)
1033 {
1034         int i;
1035
1036         if (wpa_s->sme.sa_query_trans_id == NULL ||
1037             len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1038             data[0] != WLAN_SA_QUERY_RESPONSE)
1039                 return;
1040         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1041                 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1042
1043         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1044                 return;
1045
1046         for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1047                 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1048                               i * WLAN_SA_QUERY_TR_ID_LEN,
1049                               data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1050                         break;
1051         }
1052
1053         if (i >= wpa_s->sme.sa_query_count) {
1054                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1055                         "transaction identifier found");
1056                 return;
1057         }
1058
1059         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1060                 "from " MACSTR, MAC2STR(sa));
1061         sme_stop_sa_query(wpa_s);
1062 }
1063
1064 #endif /* CONFIG_IEEE80211W */