wpa_supplicant/sme.c

   1 /*
   2  * wpa_supplicant - SME
   3  * Copyright (c) 2009-2014, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "includes.h"
  10
  11 #include "common.h"
  12 #include "utils/eloop.h"
  13 #include "common/ieee802_11_defs.h"
  14 #include "common/ieee802_11_common.h"
  15 #include "eapol_supp/eapol_supp_sm.h"
  16 #include "common/wpa_common.h"
  17 #include "common/sae.h"
  18 #include "rsn_supp/wpa.h"
  19 #include "rsn_supp/pmksa_cache.h"
  20 #include "config.h"
  21 #include "wpa_supplicant_i.h"
  22 #include "driver_i.h"
  23 #include "wpas_glue.h"
  24 #include "wps_supplicant.h"
  25 #include "p2p_supplicant.h"
  26 #include "notify.h"
  27 #include "bss.h"
  28 #include "scan.h"
  29 #include "sme.h"
  30 #include "hs20_supplicant.h"
  31
  32 #define SME_AUTH_TIMEOUT 5
  33 #define SME_ASSOC_TIMEOUT 5
  34
  35 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx);
  36 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx);
  37 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx);
  38 #ifdef CONFIG_IEEE80211W
  39 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s);
  40 #endif /* CONFIG_IEEE80211W */
  41
  42
  43 #ifdef CONFIG_SAE
  44
  45 static int index_within_array(const int *array, int idx)
  46 {
  47         int i;
  48         for (i = 0; i < idx; i++) {
  49                 if (array[i] <= 0)
  50                         return 0;
  51         }
  52         return 1;
  53 }
  54
  55
  56 static int sme_set_sae_group(struct wpa_supplicant *wpa_s)
  57 {
  58         int *groups = wpa_s->conf->sae_groups;
  59         int default_groups[] = { 19, 20, 21, 25, 26, 0 };
  60
  61         if (!groups || groups[0] <= 0)
  62                 groups = default_groups;
  63
  64         /* Configuration may have changed, so validate current index */
  65         if (!index_within_array(groups, wpa_s->sme.sae_group_index))
  66                 return -1;
  67
  68         for (;;) {
  69                 int group = groups[wpa_s->sme.sae_group_index];
  70                 if (group < 0)
  71                         break;
  72                 if (sae_set_group(&wpa_s->sme.sae, group) == 0) {
  73                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected SAE group %d",
  74                                 wpa_s->sme.sae.group);
  75                        return 0;
  76                 }
  77                 wpa_s->sme.sae_group_index++;
  78         }
  79
  80         return -1;
  81 }
  82
  83
  84 static struct wpabuf * sme_auth_build_sae_commit(struct wpa_supplicant *wpa_s,
  85                                                  struct wpa_ssid *ssid,
  86                                                  const u8 *bssid)
  87 {
  88         struct wpabuf *buf;
  89         size_t len;
  90
  91         if (ssid->passphrase == NULL) {
  92                 wpa_printf(MSG_DEBUG, "SAE: No password available");
  93                 return NULL;
  94         }
  95
  96         if (sme_set_sae_group(wpa_s) < 0) {
  97                 wpa_printf(MSG_DEBUG, "SAE: Failed to select group");
  98                 return NULL;
  99         }
 100
 101         if (sae_prepare_commit(wpa_s->own_addr, bssid,
 102                                (u8 *) ssid->passphrase,
 103                                os_strlen(ssid->passphrase),
 104                                &wpa_s->sme.sae) < 0) {
 105                 wpa_printf(MSG_DEBUG, "SAE: Could not pick PWE");
 106                 return NULL;
 107         }
 108
 109         len = wpa_s->sme.sae_token ? wpabuf_len(wpa_s->sme.sae_token) : 0;
 110         buf = wpabuf_alloc(4 + SAE_COMMIT_MAX_LEN + len);
 111         if (buf == NULL)
 112                 return NULL;
 113
 114         wpabuf_put_le16(buf, 1); /* Transaction seq# */
 115         wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
 116         sae_write_commit(&wpa_s->sme.sae, buf, wpa_s->sme.sae_token);
 117
 118         return buf;
 119 }
 120
 121
 122 static struct wpabuf * sme_auth_build_sae_confirm(struct wpa_supplicant *wpa_s)
 123 {
 124         struct wpabuf *buf;
 125
 126         buf = wpabuf_alloc(4 + SAE_CONFIRM_MAX_LEN);
 127         if (buf == NULL)
 128                 return NULL;
 129
 130         wpabuf_put_le16(buf, 2); /* Transaction seq# */
 131         wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
 132         sae_write_confirm(&wpa_s->sme.sae, buf);
 133
 134         return buf;
 135 }
 136
 137 #endif /* CONFIG_SAE */
 138
 139
 140 /**
 141  * sme_auth_handle_rrm - Handle RRM aspects of current authentication attempt
 142  * @wpa_s: Pointer to wpa_supplicant data
 143  * @bss: Pointer to the bss which is the target of authentication attempt
 144  */
 145 static void sme_auth_handle_rrm(struct wpa_supplicant *wpa_s,
 146                                 struct wpa_bss *bss)
 147 {
 148         const u8 rrm_ie_len = 5;
 149         u8 *pos;
 150         const u8 *rrm_ie;
 151
 152         wpa_s->rrm.rrm_used = 0;
 153
 154         wpa_printf(MSG_DEBUG,
 155                    "RRM: Determining whether RRM can be used - device support: 0x%x",
 156                    wpa_s->drv_rrm_flags);
 157
 158         rrm_ie = wpa_bss_get_ie(bss, WLAN_EID_RRM_ENABLED_CAPABILITIES);
 159         if (!rrm_ie || !(bss->caps & IEEE80211_CAP_RRM)) {
 160                 wpa_printf(MSG_DEBUG, "RRM: No RRM in network");
 161                 return;
 162         }
 163
 164         if (!(wpa_s->drv_rrm_flags &
 165               WPA_DRIVER_FLAGS_DS_PARAM_SET_IE_IN_PROBES) ||
 166             !(wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_QUIET)) {
 167                 wpa_printf(MSG_DEBUG,
 168                            "RRM: Insufficient RRM support in driver - do not use RRM");
 169                 return;
 170         }
 171
 172         if (sizeof(wpa_s->sme.assoc_req_ie) <
 173             wpa_s->sme.assoc_req_ie_len + rrm_ie_len + 2) {
 174                 wpa_printf(MSG_INFO,
 175                            "RRM: Unable to use RRM, no room for RRM IE");
 176                 return;
 177         }
 178
 179         wpa_printf(MSG_DEBUG, "RRM: Adding RRM IE to Association Request");
 180         pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
 181         os_memset(pos, 0, 2 + rrm_ie_len);
 182         *pos++ = WLAN_EID_RRM_ENABLED_CAPABILITIES;
 183         *pos++ = rrm_ie_len;
 184
 185         /* Set supported capabilites flags */
 186         if (wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_TX_POWER_INSERTION)
 187                 *pos |= WLAN_RRM_CAPS_LINK_MEASUREMENT;
 188
 189         wpa_s->sme.assoc_req_ie_len += rrm_ie_len + 2;
 190         wpa_s->rrm.rrm_used = 1;
 191 }
 192
 193
 194 static void sme_send_authentication(struct wpa_supplicant *wpa_s,
 195                                     struct wpa_bss *bss, struct wpa_ssid *ssid,
 196                                     int start)
 197 {
 198         struct wpa_driver_auth_params params;
 199         struct wpa_ssid *old_ssid;
 200 #ifdef CONFIG_IEEE80211R
 201         const u8 *ie;
 202 #endif /* CONFIG_IEEE80211R */
 203 #ifdef CONFIG_IEEE80211R
 204         const u8 *md = NULL;
 205 #endif /* CONFIG_IEEE80211R */
 206         int i, bssid_changed;
 207         struct wpabuf *resp = NULL;
 208         u8 ext_capab[18];
 209         int ext_capab_len;
 210         int skip_auth;
 211
 212         if (bss == NULL) {
 213                 wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for "
 214                         "the network");
 215                 wpas_connect_work_done(wpa_s);
 216                 return;
 217         }
 218
 219         skip_auth = wpa_s->conf->reassoc_same_bss_optim &&
 220                 wpa_s->reassoc_same_bss;
 221         wpa_s->current_bss = bss;
 222
 223         os_memset(&params, 0, sizeof(params));
 224         wpa_s->reassociate = 0;
 225
 226         params.freq = bss->freq;
 227         params.bssid = bss->bssid;
 228         params.ssid = bss->ssid;
 229         params.ssid_len = bss->ssid_len;
 230         params.p2p = ssid->p2p_group;
 231
 232         if (wpa_s->sme.ssid_len != params.ssid_len ||
 233             os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
 234                 wpa_s->sme.prev_bssid_set = 0;
 235
 236         wpa_s->sme.freq = params.freq;
 237         os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
 238         wpa_s->sme.ssid_len = params.ssid_len;
 239
 240         params.auth_alg = WPA_AUTH_ALG_OPEN;
 241 #ifdef IEEE8021X_EAPOL
 242         if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
 243                 if (ssid->leap) {
 244                         if (ssid->non_leap == 0)
 245                                 params.auth_alg = WPA_AUTH_ALG_LEAP;
 246                         else
 247                                 params.auth_alg |= WPA_AUTH_ALG_LEAP;
 248                 }
 249         }
 250 #endif /* IEEE8021X_EAPOL */
 251         wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
 252                 params.auth_alg);
 253         if (ssid->auth_alg) {
 254                 params.auth_alg = ssid->auth_alg;
 255                 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
 256                         "0x%x", params.auth_alg);
 257         }
 258 #ifdef CONFIG_SAE
 259         wpa_s->sme.sae_pmksa_caching = 0;
 260         if (wpa_key_mgmt_sae(ssid->key_mgmt)) {
 261                 const u8 *rsn;
 262                 struct wpa_ie_data ied;
 263
 264                 rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 265                 if (!rsn) {
 266                         wpa_dbg(wpa_s, MSG_DEBUG,
 267                                 "SAE enabled, but target BSS does not advertise RSN");
 268                 } else if (wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0 &&
 269                            wpa_key_mgmt_sae(ied.key_mgmt)) {
 270                         wpa_dbg(wpa_s, MSG_DEBUG, "Using SAE auth_alg");
 271                         params.auth_alg = WPA_AUTH_ALG_SAE;
 272                 } else {
 273                         wpa_dbg(wpa_s, MSG_DEBUG,
 274                                 "SAE enabled, but target BSS does not advertise SAE AKM for RSN");
 275                 }
 276         }
 277 #endif /* CONFIG_SAE */
 278
 279         for (i = 0; i < NUM_WEP_KEYS; i++) {
 280                 if (ssid->wep_key_len[i])
 281                         params.wep_key[i] = ssid->wep_key[i];
 282                 params.wep_key_len[i] = ssid->wep_key_len[i];
 283         }
 284         params.wep_tx_keyidx = ssid->wep_tx_keyidx;
 285
 286         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 287         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 288         os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
 289         if (bssid_changed)
 290                 wpas_notify_bssid_changed(wpa_s);
 291
 292         if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
 293              wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
 294             wpa_key_mgmt_wpa(ssid->key_mgmt)) {
 295                 int try_opportunistic;
 296                 try_opportunistic = (ssid->proactive_key_caching < 0 ?
 297                                      wpa_s->conf->okc :
 298                                      ssid->proactive_key_caching) &&
 299                         (ssid->proto & WPA_PROTO_RSN);
 300                 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
 301                                             wpa_s->current_ssid,
 302                                             try_opportunistic) == 0)
 303                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol);
 304                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 305                 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
 306                                               wpa_s->sme.assoc_req_ie,
 307                                               &wpa_s->sme.assoc_req_ie_len)) {
 308                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 309                                 "key management and encryption suites");
 310                         wpas_connect_work_done(wpa_s);
 311                         return;
 312                 }
 313         } else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
 314                    wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) {
 315                 /*
 316                  * Both WPA and non-WPA IEEE 802.1X enabled in configuration -
 317                  * use non-WPA since the scan results did not indicate that the
 318                  * AP is using WPA or WPA2.
 319                  */
 320                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 321                 wpa_s->sme.assoc_req_ie_len = 0;
 322         } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
 323                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 324                 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
 325                                               wpa_s->sme.assoc_req_ie,
 326                                               &wpa_s->sme.assoc_req_ie_len)) {
 327                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 328                                 "key management and encryption suites (no "
 329                                 "scan results)");
 330                         wpas_connect_work_done(wpa_s);
 331                         return;
 332                 }
 333 #ifdef CONFIG_WPS
 334         } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 335                 struct wpabuf *wps_ie;
 336                 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
 337                 if (wps_ie && wpabuf_len(wps_ie) <=
 338                     sizeof(wpa_s->sme.assoc_req_ie)) {
 339                         wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
 340                         os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
 341                                   wpa_s->sme.assoc_req_ie_len);
 342                 } else
 343                         wpa_s->sme.assoc_req_ie_len = 0;
 344                 wpabuf_free(wps_ie);
 345                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 346 #endif /* CONFIG_WPS */
 347         } else {
 348                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 349                 wpa_s->sme.assoc_req_ie_len = 0;
 350         }
 351
 352 #ifdef CONFIG_IEEE80211R
 353         ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
 354         if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
 355                 md = ie + 2;
 356         wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
 357         if (md) {
 358                 /* Prepare for the next transition */
 359                 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
 360         }
 361
 362         if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) {
 363                 if (wpa_s->sme.assoc_req_ie_len + 5 <
 364                     sizeof(wpa_s->sme.assoc_req_ie)) {
 365                         struct rsn_mdie *mdie;
 366                         u8 *pos = wpa_s->sme.assoc_req_ie +
 367                                 wpa_s->sme.assoc_req_ie_len;
 368                         *pos++ = WLAN_EID_MOBILITY_DOMAIN;
 369                         *pos++ = sizeof(*mdie);
 370                         mdie = (struct rsn_mdie *) pos;
 371                         os_memcpy(mdie->mobility_domain, md,
 372                                   MOBILITY_DOMAIN_ID_LEN);
 373                         mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
 374                         wpa_s->sme.assoc_req_ie_len += 5;
 375                 }
 376
 377                 if (wpa_s->sme.ft_used &&
 378                     os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
 379                     wpa_sm_has_ptk(wpa_s->wpa)) {
 380                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT "
 381                                 "over-the-air");
 382                         params.auth_alg = WPA_AUTH_ALG_FT;
 383                         params.ie = wpa_s->sme.ft_ies;
 384                         params.ie_len = wpa_s->sme.ft_ies_len;
 385                 }
 386         }
 387 #endif /* CONFIG_IEEE80211R */
 388
 389 #ifdef CONFIG_IEEE80211W
 390         wpa_s->sme.mfp = wpas_get_ssid_pmf(wpa_s, ssid);
 391         if (wpa_s->sme.mfp != NO_MGMT_FRAME_PROTECTION) {
 392                 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 393                 struct wpa_ie_data _ie;
 394                 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
 395                     _ie.capabilities &
 396                     (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
 397                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
 398                                 "MFP: require MFP");
 399                         wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
 400                 }
 401         }
 402 #endif /* CONFIG_IEEE80211W */
 403
 404 #ifdef CONFIG_P2P
 405         if (wpa_s->global->p2p) {
 406                 u8 *pos;
 407                 size_t len;
 408                 int res;
 409                 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
 410                 len = sizeof(wpa_s->sme.assoc_req_ie) -
 411                         wpa_s->sme.assoc_req_ie_len;
 412                 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
 413                                             ssid->p2p_group);
 414                 if (res >= 0)
 415                         wpa_s->sme.assoc_req_ie_len += res;
 416         }
 417 #endif /* CONFIG_P2P */
 418
 419 #ifdef CONFIG_HS20
 420         if (is_hs20_network(wpa_s, ssid, bss)) {
 421                 struct wpabuf *hs20;
 422                 hs20 = wpabuf_alloc(20);
 423                 if (hs20) {
 424                         int pps_mo_id = hs20_get_pps_mo_id(wpa_s, ssid);
 425                         size_t len;
 426
 427                         wpas_hs20_add_indication(hs20, pps_mo_id);
 428                         len = sizeof(wpa_s->sme.assoc_req_ie) -
 429                                 wpa_s->sme.assoc_req_ie_len;
 430                         if (wpabuf_len(hs20) <= len) {
 431                                 os_memcpy(wpa_s->sme.assoc_req_ie +
 432                                           wpa_s->sme.assoc_req_ie_len,
 433                                           wpabuf_head(hs20), wpabuf_len(hs20));
 434                                 wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
 435                         }
 436                         wpabuf_free(hs20);
 437                 }
 438         }
 439 #endif /* CONFIG_HS20 */
 440
 441         ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab,
 442                                              sizeof(ext_capab));
 443         if (ext_capab_len > 0) {
 444                 u8 *pos = wpa_s->sme.assoc_req_ie;
 445                 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
 446                         pos += 2 + pos[1];
 447                 os_memmove(pos + ext_capab_len, pos,
 448                            wpa_s->sme.assoc_req_ie_len -
 449                            (pos - wpa_s->sme.assoc_req_ie));
 450                 wpa_s->sme.assoc_req_ie_len += ext_capab_len;
 451                 os_memcpy(pos, ext_capab, ext_capab_len);
 452         }
 453
 454         if (wpa_s->vendor_elem[VENDOR_ELEM_ASSOC_REQ]) {
 455                 struct wpabuf *buf = wpa_s->vendor_elem[VENDOR_ELEM_ASSOC_REQ];
 456                 size_t len;
 457
 458                 len = sizeof(wpa_s->sme.assoc_req_ie) -
 459                         wpa_s->sme.assoc_req_ie_len;
 460                 if (wpabuf_len(buf) <= len) {
 461                         os_memcpy(wpa_s->sme.assoc_req_ie +
 462                                   wpa_s->sme.assoc_req_ie_len,
 463                                   wpabuf_head(buf), wpabuf_len(buf));
 464                         wpa_s->sme.assoc_req_ie_len += wpabuf_len(buf);
 465                 }
 466         }
 467
 468         sme_auth_handle_rrm(wpa_s, bss);
 469
 470 #ifdef CONFIG_SAE
 471         if (!skip_auth && params.auth_alg == WPA_AUTH_ALG_SAE &&
 472             pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid, ssid, 0) == 0)
 473         {
 474                 wpa_dbg(wpa_s, MSG_DEBUG,
 475                         "PMKSA cache entry found - try to use PMKSA caching instead of new SAE authentication");
 476                 params.auth_alg = WPA_AUTH_ALG_OPEN;
 477                 wpa_s->sme.sae_pmksa_caching = 1;
 478         }
 479
 480         if (!skip_auth && params.auth_alg == WPA_AUTH_ALG_SAE) {
 481                 if (start)
 482                         resp = sme_auth_build_sae_commit(wpa_s, ssid,
 483                                                          bss->bssid);
 484                 else
 485                         resp = sme_auth_build_sae_confirm(wpa_s);
 486                 if (resp == NULL) {
 487                         wpas_connection_failed(wpa_s, bss->bssid);
 488                         return;
 489                 }
 490                 params.sae_data = wpabuf_head(resp);
 491                 params.sae_data_len = wpabuf_len(resp);
 492                 wpa_s->sme.sae.state = start ? SAE_COMMITTED : SAE_CONFIRMED;
 493         }
 494 #endif /* CONFIG_SAE */
 495
 496         wpa_supplicant_cancel_sched_scan(wpa_s);
 497         wpa_supplicant_cancel_scan(wpa_s);
 498
 499         wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
 500                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 501                 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
 502
 503         wpa_clear_keys(wpa_s, bss->bssid);
 504         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 505         old_ssid = wpa_s->current_ssid;
 506         wpa_s->current_ssid = ssid;
 507         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
 508         wpa_supplicant_initiate_eapol(wpa_s);
 509         if (old_ssid != wpa_s->current_ssid)
 510                 wpas_notify_network_changed(wpa_s);
 511
 512 #ifdef CONFIG_P2P
 513         /*
 514          * If multi-channel concurrency is not supported, check for any
 515          * frequency conflict. In case of any frequency conflict, remove the
 516          * least prioritized connection.
 517          */
 518         if (wpa_s->num_multichan_concurrent < 2) {
 519                 int freq, num;
 520                 num = get_shared_radio_freqs(wpa_s, &freq, 1);
 521                 if (num > 0 && freq > 0 && freq != params.freq) {
 522                         wpa_printf(MSG_DEBUG,
 523                                    "Conflicting frequency found (%d != %d)",
 524                                    freq, params.freq);
 525                         if (wpas_p2p_handle_frequency_conflicts(wpa_s,
 526                                                                 params.freq,
 527                                                                 ssid) < 0) {
 528                                 wpas_connection_failed(wpa_s, bss->bssid);
 529                                 wpa_supplicant_mark_disassoc(wpa_s);
 530                                 wpabuf_free(resp);
 531                                 wpas_connect_work_done(wpa_s);
 532                                 return;
 533                         }
 534                 }
 535         }
 536 #endif /* CONFIG_P2P */
 537
 538         if (skip_auth) {
 539                 wpa_msg(wpa_s, MSG_DEBUG,
 540                         "SME: Skip authentication step on reassoc-to-same-BSS");
 541                 wpabuf_free(resp);
 542                 sme_associate(wpa_s, ssid->mode, bss->bssid, WLAN_AUTH_OPEN);
 543                 return;
 544         }
 545
 546
 547         wpa_s->sme.auth_alg = params.auth_alg;
 548         if (wpa_drv_authenticate(wpa_s, &params) < 0) {
 549                 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
 550                         "driver failed");
 551                 wpas_connection_failed(wpa_s, bss->bssid);
 552                 wpa_supplicant_mark_disassoc(wpa_s);
 553                 wpabuf_free(resp);
 554                 wpas_connect_work_done(wpa_s);
 555                 return;
 556         }
 557
 558         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 559                                NULL);
 560
 561         /*
 562          * Association will be started based on the authentication event from
 563          * the driver.
 564          */
 565
 566         wpabuf_free(resp);
 567 }
 568
 569
 570 static void sme_auth_start_cb(struct wpa_radio_work *work, int deinit)
 571 {
 572         struct wpa_connect_work *cwork = work->ctx;
 573         struct wpa_supplicant *wpa_s = work->wpa_s;
 574
 575         if (deinit) {
 576                 if (work->started)
 577                         wpa_s->connect_work = NULL;
 578
 579                 wpas_connect_work_free(cwork);
 580                 return;
 581         }
 582
 583         wpa_s->connect_work = work;
 584
 585         if (cwork->bss_removed ||
 586             !wpas_valid_bss_ssid(wpa_s, cwork->bss, cwork->ssid)) {
 587                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: BSS/SSID entry for authentication not valid anymore - drop connection attempt");
 588                 wpas_connect_work_done(wpa_s);
 589                 return;
 590         }
 591
 592         sme_send_authentication(wpa_s, cwork->bss, cwork->ssid, 1);
 593 }
 594
 595
 596 void sme_authenticate(struct wpa_supplicant *wpa_s,
 597                       struct wpa_bss *bss, struct wpa_ssid *ssid)
 598 {
 599         struct wpa_connect_work *cwork;
 600
 601         if (bss == NULL || ssid == NULL)
 602                 return;
 603         if (wpa_s->connect_work) {
 604                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reject sme_authenticate() call since connect_work exist");
 605                 return;
 606         }
 607
 608         if (radio_work_pending(wpa_s, "sme-connect")) {
 609                 /*
 610                  * The previous sme-connect work might no longer be valid due to
 611                  * the fact that the BSS list was updated. In addition, it makes
 612                  * sense to adhere to the 'newer' decision.
 613                  */
 614                 wpa_dbg(wpa_s, MSG_DEBUG,
 615                         "SME: Remove previous pending sme-connect");
 616                 radio_remove_works(wpa_s, "sme-connect", 0);
 617         }
 618
 619         cwork = os_zalloc(sizeof(*cwork));
 620         if (cwork == NULL)
 621                 return;
 622         cwork->bss = bss;
 623         cwork->ssid = ssid;
 624         cwork->sme = 1;
 625
 626 #ifdef CONFIG_SAE
 627         wpa_s->sme.sae.state = SAE_NOTHING;
 628         wpa_s->sme.sae.send_confirm = 0;
 629         wpa_s->sme.sae_group_index = 0;
 630 #endif /* CONFIG_SAE */
 631
 632         if (radio_add_work(wpa_s, bss->freq, "sme-connect", 1,
 633                            sme_auth_start_cb, cwork) < 0)
 634                 wpas_connect_work_free(cwork);
 635 }
 636
 637
 638 #ifdef CONFIG_SAE
 639
 640 static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
 641                         u16 status_code, const u8 *data, size_t len)
 642 {
 643         int *groups;
 644
 645         wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
 646                 "status code %u", auth_transaction, status_code);
 647
 648         if (auth_transaction == 1 &&
 649             status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
 650             wpa_s->sme.sae.state == SAE_COMMITTED &&
 651             wpa_s->current_bss && wpa_s->current_ssid) {
 652                 int default_groups[] = { 19, 20, 21, 25, 26, 0 };
 653                 u16 group;
 654
 655                 groups = wpa_s->conf->sae_groups;
 656                 if (!groups || groups[0] <= 0)
 657                         groups = default_groups;
 658
 659                 if (len < sizeof(le16)) {
 660                         wpa_dbg(wpa_s, MSG_DEBUG,
 661                                 "SME: Too short SAE anti-clogging token request");
 662                         return -1;
 663                 }
 664                 group = WPA_GET_LE16(data);
 665                 wpa_dbg(wpa_s, MSG_DEBUG,
 666                         "SME: SAE anti-clogging token requested (group %u)",
 667                         group);
 668                 if (sae_group_allowed(&wpa_s->sme.sae, groups, group) !=
 669                     WLAN_STATUS_SUCCESS) {
 670                         wpa_dbg(wpa_s, MSG_ERROR,
 671                                 "SME: SAE group %u of anti-clogging request is invalid",
 672                                 group);
 673                         return -1;
 674                 }
 675                 wpabuf_free(wpa_s->sme.sae_token);
 676                 wpa_s->sme.sae_token = wpabuf_alloc_copy(data + sizeof(le16),
 677                                                          len - sizeof(le16));
 678                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 679                                         wpa_s->current_ssid, 1);
 680                 return 0;
 681         }
 682
 683         if (auth_transaction == 1 &&
 684             status_code == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED &&
 685             wpa_s->sme.sae.state == SAE_COMMITTED &&
 686             wpa_s->current_bss && wpa_s->current_ssid) {
 687                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE group not supported");
 688                 wpa_s->sme.sae_group_index++;
 689                 if (sme_set_sae_group(wpa_s) < 0)
 690                         return -1; /* no other groups enabled */
 691                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Try next enabled SAE group");
 692                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 693                                         wpa_s->current_ssid, 1);
 694                 return 0;
 695         }
 696
 697         if (status_code != WLAN_STATUS_SUCCESS)
 698                 return -1;
 699
 700         if (auth_transaction == 1) {
 701                 groups = wpa_s->conf->sae_groups;
 702
 703                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
 704                 if (wpa_s->current_bss == NULL ||
 705                     wpa_s->current_ssid == NULL)
 706                         return -1;
 707                 if (wpa_s->sme.sae.state != SAE_COMMITTED)
 708                         return -1;
 709                 if (groups && groups[0] <= 0)
 710                         groups = NULL;
 711                 if (sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL,
 712                                      groups) != WLAN_STATUS_SUCCESS)
 713                         return -1;
 714
 715                 if (sae_process_commit(&wpa_s->sme.sae) < 0) {
 716                         wpa_printf(MSG_DEBUG, "SAE: Failed to process peer "
 717                                    "commit");
 718                         return -1;
 719                 }
 720
 721                 wpabuf_free(wpa_s->sme.sae_token);
 722                 wpa_s->sme.sae_token = NULL;
 723                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 724                                         wpa_s->current_ssid, 0);
 725                 return 0;
 726         } else if (auth_transaction == 2) {
 727                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
 728                 if (wpa_s->sme.sae.state != SAE_CONFIRMED)
 729                         return -1;
 730                 if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0)
 731                         return -1;
 732                 wpa_s->sme.sae.state = SAE_ACCEPTED;
 733                 sae_clear_temp_data(&wpa_s->sme.sae);
 734                 return 1;
 735         }
 736
 737         return -1;
 738 }
 739 #endif /* CONFIG_SAE */
 740
 741
 742 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
 743 {
 744         struct wpa_ssid *ssid = wpa_s->current_ssid;
 745
 746         if (ssid == NULL) {
 747                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 748                         "when network is not selected");
 749                 return;
 750         }
 751
 752         if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
 753                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 754                         "when not in authenticating state");
 755                 return;
 756         }
 757
 758         if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
 759                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
 760                         "unexpected peer " MACSTR,
 761                         MAC2STR(data->auth.peer));
 762                 return;
 763         }
 764
 765         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
 766                 " auth_type=%d auth_transaction=%d status_code=%d",
 767                 MAC2STR(data->auth.peer), data->auth.auth_type,
 768                 data->auth.auth_transaction, data->auth.status_code);
 769         wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
 770                     data->auth.ies, data->auth.ies_len);
 771
 772         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 773
 774 #ifdef CONFIG_SAE
 775         if (data->auth.auth_type == WLAN_AUTH_SAE) {
 776                 int res;
 777                 res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
 778                                    data->auth.status_code, data->auth.ies,
 779                                    data->auth.ies_len);
 780                 if (res < 0) {
 781                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 782                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 783
 784                 }
 785                 if (res != 1)
 786                         return;
 787
 788                 wpa_printf(MSG_DEBUG, "SME: SAE completed - setting PMK for "
 789                            "4-way handshake");
 790                 wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN,
 791                                wpa_s->pending_bssid);
 792         }
 793 #endif /* CONFIG_SAE */
 794
 795         if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
 796                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
 797                         "code %d)", data->auth.status_code);
 798
 799                 if (data->auth.status_code !=
 800                     WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
 801                     wpa_s->sme.auth_alg == data->auth.auth_type ||
 802                     wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
 803                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 804                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 805                         return;
 806                 }
 807
 808                 wpas_connect_work_done(wpa_s);
 809
 810                 switch (data->auth.auth_type) {
 811                 case WLAN_AUTH_OPEN:
 812                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 813
 814                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
 815                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 816                                                  wpa_s->current_ssid);
 817                         return;
 818
 819                 case WLAN_AUTH_SHARED_KEY:
 820                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
 821
 822                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
 823                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 824                                                  wpa_s->current_ssid);
 825                         return;
 826
 827                 default:
 828                         return;
 829                 }
 830         }
 831
 832 #ifdef CONFIG_IEEE80211R
 833         if (data->auth.auth_type == WLAN_AUTH_FT) {
 834                 union wpa_event_data edata;
 835                 os_memset(&edata, 0, sizeof(edata));
 836                 edata.ft_ies.ies = data->auth.ies;
 837                 edata.ft_ies.ies_len = data->auth.ies_len;
 838                 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
 839                 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
 840         }
 841 #endif /* CONFIG_IEEE80211R */
 842
 843         sme_associate(wpa_s, ssid->mode, data->auth.peer,
 844                       data->auth.auth_type);
 845 }
 846
 847
 848 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
 849                    const u8 *bssid, u16 auth_type)
 850 {
 851         struct wpa_driver_associate_params params;
 852         struct ieee802_11_elems elems;
 853 #ifdef CONFIG_HT_OVERRIDES
 854         struct ieee80211_ht_capabilities htcaps;
 855         struct ieee80211_ht_capabilities htcaps_mask;
 856 #endif /* CONFIG_HT_OVERRIDES */
 857 #ifdef CONFIG_VHT_OVERRIDES
 858         struct ieee80211_vht_capabilities vhtcaps;
 859         struct ieee80211_vht_capabilities vhtcaps_mask;
 860 #endif /* CONFIG_VHT_OVERRIDES */
 861
 862         os_memset(&params, 0, sizeof(params));
 863         params.bssid = bssid;
 864         params.ssid = wpa_s->sme.ssid;
 865         params.ssid_len = wpa_s->sme.ssid_len;
 866         params.freq.freq = wpa_s->sme.freq;
 867         params.bg_scan_period = wpa_s->current_ssid ?
 868                 wpa_s->current_ssid->bg_scan_period : -1;
 869         params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
 870                 wpa_s->sme.assoc_req_ie : NULL;
 871         params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
 872         params.pairwise_suite = wpa_s->pairwise_cipher;
 873         params.group_suite = wpa_s->group_cipher;
 874         params.key_mgmt_suite = wpa_s->key_mgmt;
 875         params.wpa_proto = wpa_s->wpa_proto;
 876 #ifdef CONFIG_HT_OVERRIDES
 877         os_memset(&htcaps, 0, sizeof(htcaps));
 878         os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
 879         params.htcaps = (u8 *) &htcaps;
 880         params.htcaps_mask = (u8 *) &htcaps_mask;
 881         wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, &params);
 882 #endif /* CONFIG_HT_OVERRIDES */
 883 #ifdef CONFIG_VHT_OVERRIDES
 884         os_memset(&vhtcaps, 0, sizeof(vhtcaps));
 885         os_memset(&vhtcaps_mask, 0, sizeof(vhtcaps_mask));
 886         params.vhtcaps = &vhtcaps;
 887         params.vhtcaps_mask = &vhtcaps_mask;
 888         wpa_supplicant_apply_vht_overrides(wpa_s, wpa_s->current_ssid, &params);
 889 #endif /* CONFIG_VHT_OVERRIDES */
 890 #ifdef CONFIG_IEEE80211R
 891         if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
 892                 params.wpa_ie = wpa_s->sme.ft_ies;
 893                 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
 894         }
 895 #endif /* CONFIG_IEEE80211R */
 896         params.mode = mode;
 897         params.mgmt_frame_protection = wpa_s->sme.mfp;
 898         params.rrm_used = wpa_s->rrm.rrm_used;
 899         if (wpa_s->sme.prev_bssid_set)
 900                 params.prev_bssid = wpa_s->sme.prev_bssid;
 901
 902         wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
 903                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 904                 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
 905                 params.freq.freq);
 906
 907         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
 908
 909         if (params.wpa_ie == NULL ||
 910             ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
 911             < 0) {
 912                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
 913                 os_memset(&elems, 0, sizeof(elems));
 914         }
 915         if (elems.rsn_ie) {
 916                 params.wpa_proto = WPA_PROTO_RSN;
 917                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
 918                                         elems.rsn_ie_len + 2);
 919         } else if (elems.wpa_ie) {
 920                 params.wpa_proto = WPA_PROTO_WPA;
 921                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
 922                                         elems.wpa_ie_len + 2);
 923         } else if (elems.osen) {
 924                 params.wpa_proto = WPA_PROTO_OSEN;
 925                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.osen - 2,
 926                                         elems.osen_len + 2);
 927         } else
 928                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 929         if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
 930                 params.p2p = 1;
 931
 932         if (wpa_s->parent->set_sta_uapsd)
 933                 params.uapsd = wpa_s->parent->sta_uapsd;
 934         else
 935                 params.uapsd = -1;
 936
 937         if (wpa_drv_associate(wpa_s, &params) < 0) {
 938                 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
 939                         "driver failed");
 940                 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 941                 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 942                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 943                 return;
 944         }
 945
 946         eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
 947                                NULL);
 948 }
 949
 950
 951 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
 952                       const u8 *ies, size_t ies_len)
 953 {
 954         if (md == NULL || ies == NULL) {
 955                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
 956                 os_free(wpa_s->sme.ft_ies);
 957                 wpa_s->sme.ft_ies = NULL;
 958                 wpa_s->sme.ft_ies_len = 0;
 959                 wpa_s->sme.ft_used = 0;
 960                 return 0;
 961         }
 962
 963         os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
 964         wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
 965         os_free(wpa_s->sme.ft_ies);
 966         wpa_s->sme.ft_ies = os_malloc(ies_len);
 967         if (wpa_s->sme.ft_ies == NULL)
 968                 return -1;
 969         os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
 970         wpa_s->sme.ft_ies_len = ies_len;
 971         return 0;
 972 }
 973
 974
 975 static void sme_deauth(struct wpa_supplicant *wpa_s)
 976 {
 977         int bssid_changed;
 978
 979         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 980
 981         if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
 982                                    WLAN_REASON_DEAUTH_LEAVING) < 0) {
 983                 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
 984                         "failed");
 985         }
 986         wpa_s->sme.prev_bssid_set = 0;
 987
 988         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 989         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 990         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 991         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 992         if (bssid_changed)
 993                 wpas_notify_bssid_changed(wpa_s);
 994 }
 995
 996
 997 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
 998                             union wpa_event_data *data)
 999 {
1000         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
1001                 "status code %d", MAC2STR(wpa_s->pending_bssid),
1002                 data->assoc_reject.status_code);
1003
1004         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1005
1006 #ifdef CONFIG_SAE
1007         if (wpa_s->sme.sae_pmksa_caching && wpa_s->current_ssid &&
1008             wpa_key_mgmt_sae(wpa_s->current_ssid->key_mgmt)) {
1009                 wpa_dbg(wpa_s, MSG_DEBUG,
1010                         "PMKSA caching attempt rejected - drop PMKSA cache entry and fall back to SAE authentication");
1011                 wpa_sm_aborted_cached(wpa_s->wpa);
1012                 wpa_sm_pmksa_cache_flush(wpa_s->wpa, wpa_s->current_ssid);
1013                 if (wpa_s->current_bss) {
1014                         struct wpa_bss *bss = wpa_s->current_bss;
1015                         struct wpa_ssid *ssid = wpa_s->current_ssid;
1016
1017                         wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
1018                                                WLAN_REASON_DEAUTH_LEAVING);
1019                         wpas_connect_work_done(wpa_s);
1020                         wpa_supplicant_mark_disassoc(wpa_s);
1021                         wpa_supplicant_connect(wpa_s, bss, ssid);
1022                         return;
1023                 }
1024         }
1025 #endif /* CONFIG_SAE */
1026
1027         /*
1028          * For now, unconditionally terminate the previous authentication. In
1029          * theory, this should not be needed, but mac80211 gets quite confused
1030          * if the authentication is left pending.. Some roaming cases might
1031          * benefit from using the previous authentication, so this could be
1032          * optimized in the future.
1033          */
1034         sme_deauth(wpa_s);
1035 }
1036
1037
1038 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
1039                               union wpa_event_data *data)
1040 {
1041         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
1042         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1043         wpa_supplicant_mark_disassoc(wpa_s);
1044 }
1045
1046
1047 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
1048                                union wpa_event_data *data)
1049 {
1050         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
1051         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1052         wpa_supplicant_mark_disassoc(wpa_s);
1053 }
1054
1055
1056 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
1057                         struct disassoc_info *info)
1058 {
1059         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
1060         if (wpa_s->sme.prev_bssid_set) {
1061                 /*
1062                  * cfg80211/mac80211 can get into somewhat confused state if
1063                  * the AP only disassociates us and leaves us in authenticated
1064                  * state. For now, force the state to be cleared to avoid
1065                  * confusing errors if we try to associate with the AP again.
1066                  */
1067                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
1068                         "driver state");
1069                 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
1070                                        WLAN_REASON_DEAUTH_LEAVING);
1071         }
1072 }
1073
1074
1075 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
1076 {
1077         struct wpa_supplicant *wpa_s = eloop_ctx;
1078         if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
1079                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
1080                 sme_deauth(wpa_s);
1081         }
1082 }
1083
1084
1085 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
1086 {
1087         struct wpa_supplicant *wpa_s = eloop_ctx;
1088         if (wpa_s->wpa_state == WPA_ASSOCIATING) {
1089                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
1090                 sme_deauth(wpa_s);
1091         }
1092 }
1093
1094
1095 void sme_state_changed(struct wpa_supplicant *wpa_s)
1096 {
1097         /* Make sure timers are cleaned up appropriately. */
1098         if (wpa_s->wpa_state != WPA_ASSOCIATING)
1099                 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1100         if (wpa_s->wpa_state != WPA_AUTHENTICATING)
1101                 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1102 }
1103
1104
1105 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
1106                                        const u8 *prev_pending_bssid)
1107 {
1108         /*
1109          * mac80211-workaround to force deauth on failed auth cmd,
1110          * requires us to remain in authenticating state to allow the
1111          * second authentication attempt to be continued properly.
1112          */
1113         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
1114                 "to proceed after disconnection event");
1115         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
1116         os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
1117
1118         /*
1119          * Re-arm authentication timer in case auth fails for whatever reason.
1120          */
1121         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1122         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
1123                                NULL);
1124 }
1125
1126
1127 void sme_clear_on_disassoc(struct wpa_supplicant *wpa_s)
1128 {
1129         wpa_s->sme.prev_bssid_set = 0;
1130 #ifdef CONFIG_SAE
1131         wpabuf_free(wpa_s->sme.sae_token);
1132         wpa_s->sme.sae_token = NULL;
1133         sae_clear_data(&wpa_s->sme.sae);
1134 #endif /* CONFIG_SAE */
1135 #ifdef CONFIG_IEEE80211R
1136         if (wpa_s->sme.ft_ies)
1137                 sme_update_ft_ies(wpa_s, NULL, NULL, 0);
1138 #endif /* CONFIG_IEEE80211R */
1139 }
1140
1141
1142 void sme_deinit(struct wpa_supplicant *wpa_s)
1143 {
1144         os_free(wpa_s->sme.ft_ies);
1145         wpa_s->sme.ft_ies = NULL;
1146         wpa_s->sme.ft_ies_len = 0;
1147 #ifdef CONFIG_IEEE80211W
1148         sme_stop_sa_query(wpa_s);
1149 #endif /* CONFIG_IEEE80211W */
1150         sme_clear_on_disassoc(wpa_s);
1151
1152         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1153         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1154         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1155 }
1156
1157
1158 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
1159                                    const u8 *chan_list, u8 num_channels,
1160                                    u8 num_intol)
1161 {
1162         struct ieee80211_2040_bss_coex_ie *bc_ie;
1163         struct ieee80211_2040_intol_chan_report *ic_report;
1164         struct wpabuf *buf;
1165
1166         wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR
1167                    " (num_channels=%u num_intol=%u)",
1168                    MAC2STR(wpa_s->bssid), num_channels, num_intol);
1169         wpa_hexdump(MSG_DEBUG, "SME: 20/40 BSS Intolerant Channels",
1170                     chan_list, num_channels);
1171
1172         buf = wpabuf_alloc(2 + /* action.category + action_code */
1173                            sizeof(struct ieee80211_2040_bss_coex_ie) +
1174                            sizeof(struct ieee80211_2040_intol_chan_report) +
1175                            num_channels);
1176         if (buf == NULL)
1177                 return;
1178
1179         wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
1180         wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
1181
1182         bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
1183         bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
1184         bc_ie->length = 1;
1185         if (num_intol)
1186                 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
1187
1188         if (num_channels > 0) {
1189                 ic_report = wpabuf_put(buf, sizeof(*ic_report));
1190                 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
1191                 ic_report->length = num_channels + 1;
1192                 ic_report->op_class = 0;
1193                 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
1194                           num_channels);
1195         }
1196
1197         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1198                                 wpa_s->own_addr, wpa_s->bssid,
1199                                 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
1200                 wpa_msg(wpa_s, MSG_INFO,
1201                         "SME: Failed to send 20/40 BSS Coexistence frame");
1202         }
1203
1204         wpabuf_free(buf);
1205 }
1206
1207
1208 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
1209 {
1210         struct wpa_bss *bss;
1211         const u8 *ie;
1212         u16 ht_cap;
1213         u8 chan_list[P2P_MAX_CHANNELS], channel;
1214         u8 num_channels = 0, num_intol = 0, i;
1215
1216         if (!wpa_s->sme.sched_obss_scan)
1217                 return 0;
1218
1219         wpa_s->sme.sched_obss_scan = 0;
1220         if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
1221                 return 1;
1222
1223         /*
1224          * Check whether AP uses regulatory triplet or channel triplet in
1225          * country info. Right now the operating class of the BSS channel
1226          * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
1227          * based on the assumption that operating class triplet is not used in
1228          * beacon frame. If the First Channel Number/Operating Extension
1229          * Identifier octet has a positive integer value of 201 or greater,
1230          * then its operating class triplet.
1231          *
1232          * TODO: If Supported Operating Classes element is present in beacon
1233          * frame, have to lookup operating class in Annex E and fill them in
1234          * 2040 coex frame.
1235          */
1236         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
1237         if (ie && (ie[1] >= 6) && (ie[5] >= 201))
1238                 return 1;
1239
1240         os_memset(chan_list, 0, sizeof(chan_list));
1241
1242         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1243                 /* Skip other band bss */
1244                 enum hostapd_hw_mode mode;
1245                 mode = ieee80211_freq_to_chan(bss->freq, &channel);
1246                 if (mode != HOSTAPD_MODE_IEEE80211G &&
1247                     mode != HOSTAPD_MODE_IEEE80211B)
1248                         continue;
1249
1250                 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
1251                 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
1252                 wpa_printf(MSG_DEBUG, "SME OBSS scan BSS " MACSTR
1253                            " freq=%u chan=%u ht_cap=0x%x",
1254                            MAC2STR(bss->bssid), bss->freq, channel, ht_cap);
1255
1256                 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
1257                         if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
1258                                 num_intol++;
1259
1260                         /* Check whether the channel is already considered */
1261                         for (i = 0; i < num_channels; i++) {
1262                                 if (channel == chan_list[i])
1263                                         break;
1264                         }
1265                         if (i != num_channels)
1266                                 continue;
1267
1268                         chan_list[num_channels++] = channel;
1269                 }
1270         }
1271
1272         sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
1273         return 1;
1274 }
1275
1276
1277 static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
1278                                           u16 num_modes,
1279                                           enum hostapd_hw_mode mode)
1280 {
1281         u16 i;
1282
1283         for (i = 0; i < num_modes; i++) {
1284                 if (modes[i].mode == mode)
1285                         return &modes[i];
1286         }
1287
1288         return NULL;
1289 }
1290
1291
1292 static void wpa_obss_scan_freqs_list(struct wpa_supplicant *wpa_s,
1293                                      struct wpa_driver_scan_params *params)
1294 {
1295         /* Include only affected channels */
1296         struct hostapd_hw_modes *mode;
1297         int count, i;
1298         int start, end;
1299
1300         mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes,
1301                         HOSTAPD_MODE_IEEE80211G);
1302         if (mode == NULL) {
1303                 /* No channels supported in this band - use empty list */
1304                 params->freqs = os_zalloc(sizeof(int));
1305                 return;
1306         }
1307
1308         if (wpa_s->sme.ht_sec_chan == HT_SEC_CHAN_UNKNOWN &&
1309             wpa_s->current_bss) {
1310                 const u8 *ie;
1311
1312                 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_OPERATION);
1313                 if (ie && ie[1] >= 2) {
1314                         u8 o;
1315
1316                         o = ie[3] & HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK;
1317                         if (o == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
1318                                 wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_ABOVE;
1319                         else if (o == HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
1320                                 wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_BELOW;
1321                 }
1322         }
1323
1324         start = wpa_s->assoc_freq - 10;
1325         end = wpa_s->assoc_freq + 10;
1326         switch (wpa_s->sme.ht_sec_chan) {
1327         case HT_SEC_CHAN_UNKNOWN:
1328                 /* HT40+ possible on channels 1..9 */
1329                 if (wpa_s->assoc_freq <= 2452)
1330                         start -= 20;
1331                 /* HT40- possible on channels 5-13 */
1332                 if (wpa_s->assoc_freq >= 2432)
1333                         end += 20;
1334                 break;
1335         case HT_SEC_CHAN_ABOVE:
1336                 end += 20;
1337                 break;
1338         case HT_SEC_CHAN_BELOW:
1339                 start -= 20;
1340                 break;
1341         }
1342         wpa_printf(MSG_DEBUG,
1343                    "OBSS: assoc_freq %d possible affected range %d-%d",
1344                    wpa_s->assoc_freq, start, end);
1345
1346         params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
1347         if (params->freqs == NULL)
1348                 return;
1349         for (count = 0, i = 0; i < mode->num_channels; i++) {
1350                 int freq;
1351
1352                 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
1353                         continue;
1354                 freq = mode->channels[i].freq;
1355                 if (freq - 10 >= end || freq + 10 <= start)
1356                         continue; /* not affected */
1357                 params->freqs[count++] = freq;
1358         }
1359 }
1360
1361
1362 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1363 {
1364         struct wpa_supplicant *wpa_s = eloop_ctx;
1365         struct wpa_driver_scan_params params;
1366
1367         if (!wpa_s->current_bss) {
1368                 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
1369                 return;
1370         }
1371
1372         os_memset(&params, 0, sizeof(params));
1373         wpa_obss_scan_freqs_list(wpa_s, &params);
1374         params.low_priority = 1;
1375         wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
1376
1377         if (wpa_supplicant_trigger_scan(wpa_s, &params))
1378                 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
1379         else
1380                 wpa_s->sme.sched_obss_scan = 1;
1381         os_free(params.freqs);
1382
1383         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1384                                sme_obss_scan_timeout, wpa_s, NULL);
1385 }
1386
1387
1388 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
1389 {
1390         const u8 *ie;
1391         struct wpa_bss *bss = wpa_s->current_bss;
1392         struct wpa_ssid *ssid = wpa_s->current_ssid;
1393         struct hostapd_hw_modes *hw_mode = NULL;
1394         int i;
1395
1396         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1397         wpa_s->sme.sched_obss_scan = 0;
1398         wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_UNKNOWN;
1399         if (!enable)
1400                 return;
1401
1402         /*
1403          * Schedule OBSS scan if driver is using station SME in wpa_supplicant
1404          * or it expects OBSS scan to be performed by wpa_supplicant.
1405          */
1406         if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
1407               (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
1408             ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
1409                 return;
1410
1411         if (!wpa_s->hw.modes)
1412                 return;
1413
1414         /* only HT caps in 11g mode are relevant */
1415         for (i = 0; i < wpa_s->hw.num_modes; i++) {
1416                 hw_mode = &wpa_s->hw.modes[i];
1417                 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
1418                         break;
1419         }
1420
1421         /* Driver does not support HT40 for 11g or doesn't have 11g. */
1422         if (i == wpa_s->hw.num_modes || !hw_mode ||
1423             !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1424                 return;
1425
1426         if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
1427                 return; /* Not associated on 2.4 GHz band */
1428
1429         /* Check whether AP supports HT40 */
1430         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
1431         if (!ie || ie[1] < 2 ||
1432             !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1433                 return; /* AP does not support HT40 */
1434
1435         ie = wpa_bss_get_ie(wpa_s->current_bss,
1436                             WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
1437         if (!ie || ie[1] < 14)
1438                 return; /* AP does not request OBSS scans */
1439
1440         wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
1441         if (wpa_s->sme.obss_scan_int < 10) {
1442                 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
1443                            "replaced with the minimum 10 sec",
1444                            wpa_s->sme.obss_scan_int);
1445                 wpa_s->sme.obss_scan_int = 10;
1446         }
1447         wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
1448                    wpa_s->sme.obss_scan_int);
1449         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1450                                sme_obss_scan_timeout, wpa_s, NULL);
1451 }
1452
1453
1454 #ifdef CONFIG_IEEE80211W
1455
1456 static const unsigned int sa_query_max_timeout = 1000;
1457 static const unsigned int sa_query_retry_timeout = 201;
1458
1459 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
1460 {
1461         u32 tu;
1462         struct os_reltime now, passed;
1463         os_get_reltime(&now);
1464         os_reltime_sub(&now, &wpa_s->sme.sa_query_start, &passed);
1465         tu = (passed.sec * 1000000 + passed.usec) / 1024;
1466         if (sa_query_max_timeout < tu) {
1467                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
1468                 sme_stop_sa_query(wpa_s);
1469                 wpa_supplicant_deauthenticate(
1470                         wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
1471                 return 1;
1472         }
1473
1474         return 0;
1475 }
1476
1477
1478 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
1479                                   const u8 *trans_id)
1480 {
1481         u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
1482         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
1483                 MACSTR, MAC2STR(wpa_s->bssid));
1484         wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
1485                     trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1486         req[0] = WLAN_ACTION_SA_QUERY;
1487         req[1] = WLAN_SA_QUERY_REQUEST;
1488         os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1489         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1490                                 wpa_s->own_addr, wpa_s->bssid,
1491                                 req, sizeof(req), 0) < 0)
1492                 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
1493                         "Request");
1494 }
1495
1496
1497 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
1498 {
1499         struct wpa_supplicant *wpa_s = eloop_ctx;
1500         unsigned int timeout, sec, usec;
1501         u8 *trans_id, *nbuf;
1502
1503         if (wpa_s->sme.sa_query_count > 0 &&
1504             sme_check_sa_query_timeout(wpa_s))
1505                 return;
1506
1507         nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
1508                                 wpa_s->sme.sa_query_count + 1,
1509                                 WLAN_SA_QUERY_TR_ID_LEN);
1510         if (nbuf == NULL)
1511                 return;
1512         if (wpa_s->sme.sa_query_count == 0) {
1513                 /* Starting a new SA Query procedure */
1514                 os_get_reltime(&wpa_s->sme.sa_query_start);
1515         }
1516         trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
1517         wpa_s->sme.sa_query_trans_id = nbuf;
1518         wpa_s->sme.sa_query_count++;
1519
1520         if (os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN) < 0) {
1521                 wpa_printf(MSG_DEBUG, "Could not generate SA Query ID");
1522                 return;
1523         }
1524
1525         timeout = sa_query_retry_timeout;
1526         sec = ((timeout / 1000) * 1024) / 1000;
1527         usec = (timeout % 1000) * 1024;
1528         eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
1529
1530         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
1531                 wpa_s->sme.sa_query_count);
1532
1533         sme_send_sa_query_req(wpa_s, trans_id);
1534 }
1535
1536
1537 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
1538 {
1539         sme_sa_query_timer(wpa_s, NULL);
1540 }
1541
1542
1543 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
1544 {
1545         eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
1546         os_free(wpa_s->sme.sa_query_trans_id);
1547         wpa_s->sme.sa_query_trans_id = NULL;
1548         wpa_s->sme.sa_query_count = 0;
1549 }
1550
1551
1552 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1553                                  const u8 *da, u16 reason_code)
1554 {
1555         struct wpa_ssid *ssid;
1556         struct os_reltime now;
1557
1558         if (wpa_s->wpa_state != WPA_COMPLETED)
1559                 return;
1560         ssid = wpa_s->current_ssid;
1561         if (wpas_get_ssid_pmf(wpa_s, ssid) == NO_MGMT_FRAME_PROTECTION)
1562                 return;
1563         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1564                 return;
1565         if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1566             reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1567                 return;
1568         if (wpa_s->sme.sa_query_count > 0)
1569                 return;
1570
1571         os_get_reltime(&now);
1572         if (wpa_s->sme.last_unprot_disconnect.sec &&
1573             !os_reltime_expired(&now, &wpa_s->sme.last_unprot_disconnect, 10))
1574                 return; /* limit SA Query procedure frequency */
1575         wpa_s->sme.last_unprot_disconnect = now;
1576
1577         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1578                 "possible AP/STA state mismatch - trigger SA Query");
1579         sme_start_sa_query(wpa_s);
1580 }
1581
1582
1583 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1584                      const u8 *data, size_t len)
1585 {
1586         int i;
1587
1588         if (wpa_s->sme.sa_query_trans_id == NULL ||
1589             len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1590             data[0] != WLAN_SA_QUERY_RESPONSE)
1591                 return;
1592         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1593                 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1594
1595         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1596                 return;
1597
1598         for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1599                 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1600                               i * WLAN_SA_QUERY_TR_ID_LEN,
1601                               data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1602                         break;
1603         }
1604
1605         if (i >= wpa_s->sme.sa_query_count) {
1606                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1607                         "transaction identifier found");
1608                 return;
1609         }
1610
1611         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1612                 "from " MACSTR, MAC2STR(sa));
1613         sme_stop_sa_query(wpa_s);
1614 }
1615
1616 #endif /* CONFIG_IEEE80211W */