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
 211         if (bss == NULL) {
 212                 wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for "
 213                         "the network");
 214                 wpas_connect_work_done(wpa_s);
 215                 return;
 216         }
 217
 218         wpa_s->current_bss = bss;
 219
 220         os_memset(&params, 0, sizeof(params));
 221         wpa_s->reassociate = 0;
 222
 223         params.freq = bss->freq;
 224         params.bssid = bss->bssid;
 225         params.ssid = bss->ssid;
 226         params.ssid_len = bss->ssid_len;
 227         params.p2p = ssid->p2p_group;
 228
 229         if (wpa_s->sme.ssid_len != params.ssid_len ||
 230             os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
 231                 wpa_s->sme.prev_bssid_set = 0;
 232
 233         wpa_s->sme.freq = params.freq;
 234         os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
 235         wpa_s->sme.ssid_len = params.ssid_len;
 236
 237         params.auth_alg = WPA_AUTH_ALG_OPEN;
 238 #ifdef IEEE8021X_EAPOL
 239         if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
 240                 if (ssid->leap) {
 241                         if (ssid->non_leap == 0)
 242                                 params.auth_alg = WPA_AUTH_ALG_LEAP;
 243                         else
 244                                 params.auth_alg |= WPA_AUTH_ALG_LEAP;
 245                 }
 246         }
 247 #endif /* IEEE8021X_EAPOL */
 248         wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
 249                 params.auth_alg);
 250         if (ssid->auth_alg) {
 251                 params.auth_alg = ssid->auth_alg;
 252                 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
 253                         "0x%x", params.auth_alg);
 254         }
 255 #ifdef CONFIG_SAE
 256         wpa_s->sme.sae_pmksa_caching = 0;
 257         if (wpa_key_mgmt_sae(ssid->key_mgmt)) {
 258                 const u8 *rsn;
 259                 struct wpa_ie_data ied;
 260
 261                 rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 262                 if (!rsn) {
 263                         wpa_dbg(wpa_s, MSG_DEBUG,
 264                                 "SAE enabled, but target BSS does not advertise RSN");
 265                 } else if (wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0 &&
 266                            wpa_key_mgmt_sae(ied.key_mgmt)) {
 267                         wpa_dbg(wpa_s, MSG_DEBUG, "Using SAE auth_alg");
 268                         params.auth_alg = WPA_AUTH_ALG_SAE;
 269                 } else {
 270                         wpa_dbg(wpa_s, MSG_DEBUG,
 271                                 "SAE enabled, but target BSS does not advertise SAE AKM for RSN");
 272                 }
 273         }
 274 #endif /* CONFIG_SAE */
 275
 276         for (i = 0; i < NUM_WEP_KEYS; i++) {
 277                 if (ssid->wep_key_len[i])
 278                         params.wep_key[i] = ssid->wep_key[i];
 279                 params.wep_key_len[i] = ssid->wep_key_len[i];
 280         }
 281         params.wep_tx_keyidx = ssid->wep_tx_keyidx;
 282
 283         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 284         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 285         os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
 286         if (bssid_changed)
 287                 wpas_notify_bssid_changed(wpa_s);
 288
 289         if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
 290              wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
 291             wpa_key_mgmt_wpa(ssid->key_mgmt)) {
 292                 int try_opportunistic;
 293                 try_opportunistic = (ssid->proactive_key_caching < 0 ?
 294                                      wpa_s->conf->okc :
 295                                      ssid->proactive_key_caching) &&
 296                         (ssid->proto & WPA_PROTO_RSN);
 297                 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
 298                                             wpa_s->current_ssid,
 299                                             try_opportunistic) == 0)
 300                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
 301                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 302                 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
 303                                               wpa_s->sme.assoc_req_ie,
 304                                               &wpa_s->sme.assoc_req_ie_len)) {
 305                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 306                                 "key management and encryption suites");
 307                         wpas_connect_work_done(wpa_s);
 308                         return;
 309                 }
 310         } else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
 311                    wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) {
 312                 /*
 313                  * Both WPA and non-WPA IEEE 802.1X enabled in configuration -
 314                  * use non-WPA since the scan results did not indicate that the
 315                  * AP is using WPA or WPA2.
 316                  */
 317                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 318                 wpa_s->sme.assoc_req_ie_len = 0;
 319         } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
 320                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 321                 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
 322                                               wpa_s->sme.assoc_req_ie,
 323                                               &wpa_s->sme.assoc_req_ie_len)) {
 324                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 325                                 "key management and encryption suites (no "
 326                                 "scan results)");
 327                         wpas_connect_work_done(wpa_s);
 328                         return;
 329                 }
 330 #ifdef CONFIG_WPS
 331         } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 332                 struct wpabuf *wps_ie;
 333                 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
 334                 if (wps_ie && wpabuf_len(wps_ie) <=
 335                     sizeof(wpa_s->sme.assoc_req_ie)) {
 336                         wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
 337                         os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
 338                                   wpa_s->sme.assoc_req_ie_len);
 339                 } else
 340                         wpa_s->sme.assoc_req_ie_len = 0;
 341                 wpabuf_free(wps_ie);
 342                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 343 #endif /* CONFIG_WPS */
 344         } else {
 345                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 346                 wpa_s->sme.assoc_req_ie_len = 0;
 347         }
 348
 349 #ifdef CONFIG_IEEE80211R
 350         ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
 351         if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
 352                 md = ie + 2;
 353         wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
 354         if (md) {
 355                 /* Prepare for the next transition */
 356                 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
 357         }
 358
 359         if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) {
 360                 if (wpa_s->sme.assoc_req_ie_len + 5 <
 361                     sizeof(wpa_s->sme.assoc_req_ie)) {
 362                         struct rsn_mdie *mdie;
 363                         u8 *pos = wpa_s->sme.assoc_req_ie +
 364                                 wpa_s->sme.assoc_req_ie_len;
 365                         *pos++ = WLAN_EID_MOBILITY_DOMAIN;
 366                         *pos++ = sizeof(*mdie);
 367                         mdie = (struct rsn_mdie *) pos;
 368                         os_memcpy(mdie->mobility_domain, md,
 369                                   MOBILITY_DOMAIN_ID_LEN);
 370                         mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
 371                         wpa_s->sme.assoc_req_ie_len += 5;
 372                 }
 373
 374                 if (wpa_s->sme.ft_used &&
 375                     os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
 376                     wpa_sm_has_ptk(wpa_s->wpa)) {
 377                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT "
 378                                 "over-the-air");
 379                         params.auth_alg = WPA_AUTH_ALG_FT;
 380                         params.ie = wpa_s->sme.ft_ies;
 381                         params.ie_len = wpa_s->sme.ft_ies_len;
 382                 }
 383         }
 384 #endif /* CONFIG_IEEE80211R */
 385
 386 #ifdef CONFIG_IEEE80211W
 387         wpa_s->sme.mfp = ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
 388                 wpa_s->conf->pmf : ssid->ieee80211w;
 389         if (wpa_s->sme.mfp != NO_MGMT_FRAME_PROTECTION) {
 390                 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 391                 struct wpa_ie_data _ie;
 392                 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
 393                     _ie.capabilities &
 394                     (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
 395                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
 396                                 "MFP: require MFP");
 397                         wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
 398                 }
 399         }
 400 #endif /* CONFIG_IEEE80211W */
 401
 402 #ifdef CONFIG_P2P
 403         if (wpa_s->global->p2p) {
 404                 u8 *pos;
 405                 size_t len;
 406                 int res;
 407                 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
 408                 len = sizeof(wpa_s->sme.assoc_req_ie) -
 409                         wpa_s->sme.assoc_req_ie_len;
 410                 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
 411                                             ssid->p2p_group);
 412                 if (res >= 0)
 413                         wpa_s->sme.assoc_req_ie_len += res;
 414         }
 415 #endif /* CONFIG_P2P */
 416
 417 #ifdef CONFIG_HS20
 418         if (is_hs20_network(wpa_s, ssid, bss)) {
 419                 struct wpabuf *hs20;
 420                 hs20 = wpabuf_alloc(20);
 421                 if (hs20) {
 422                         int pps_mo_id = hs20_get_pps_mo_id(wpa_s, ssid);
 423                         size_t len;
 424
 425                         wpas_hs20_add_indication(hs20, pps_mo_id);
 426                         len = sizeof(wpa_s->sme.assoc_req_ie) -
 427                                 wpa_s->sme.assoc_req_ie_len;
 428                         if (wpabuf_len(hs20) <= len) {
 429                                 os_memcpy(wpa_s->sme.assoc_req_ie +
 430                                           wpa_s->sme.assoc_req_ie_len,
 431                                           wpabuf_head(hs20), wpabuf_len(hs20));
 432                                 wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
 433                         }
 434                         wpabuf_free(hs20);
 435                 }
 436         }
 437 #endif /* CONFIG_HS20 */
 438
 439         ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab,
 440                                              sizeof(ext_capab));
 441         if (ext_capab_len > 0) {
 442                 u8 *pos = wpa_s->sme.assoc_req_ie;
 443                 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
 444                         pos += 2 + pos[1];
 445                 os_memmove(pos + ext_capab_len, pos,
 446                            wpa_s->sme.assoc_req_ie_len -
 447                            (pos - wpa_s->sme.assoc_req_ie));
 448                 wpa_s->sme.assoc_req_ie_len += ext_capab_len;
 449                 os_memcpy(pos, ext_capab, ext_capab_len);
 450         }
 451
 452         if (wpa_s->vendor_elem[VENDOR_ELEM_ASSOC_REQ]) {
 453                 struct wpabuf *buf = wpa_s->vendor_elem[VENDOR_ELEM_ASSOC_REQ];
 454                 size_t len;
 455
 456                 len = sizeof(wpa_s->sme.assoc_req_ie) -
 457                         wpa_s->sme.assoc_req_ie_len;
 458                 if (wpabuf_len(buf) <= len) {
 459                         os_memcpy(wpa_s->sme.assoc_req_ie +
 460                                   wpa_s->sme.assoc_req_ie_len,
 461                                   wpabuf_head(buf), wpabuf_len(buf));
 462                         wpa_s->sme.assoc_req_ie_len += wpabuf_len(buf);
 463                 }
 464         }
 465
 466         sme_auth_handle_rrm(wpa_s, bss);
 467
 468 #ifdef CONFIG_SAE
 469         if (params.auth_alg == WPA_AUTH_ALG_SAE &&
 470             pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid, ssid, 0) == 0)
 471         {
 472                 wpa_dbg(wpa_s, MSG_DEBUG,
 473                         "PMKSA cache entry found - try to use PMKSA caching instead of new SAE authentication");
 474                 params.auth_alg = WPA_AUTH_ALG_OPEN;
 475                 wpa_s->sme.sae_pmksa_caching = 1;
 476         }
 477
 478         if (params.auth_alg == WPA_AUTH_ALG_SAE) {
 479                 if (start)
 480                         resp = sme_auth_build_sae_commit(wpa_s, ssid,
 481                                                          bss->bssid);
 482                 else
 483                         resp = sme_auth_build_sae_confirm(wpa_s);
 484                 if (resp == NULL) {
 485                         wpas_connection_failed(wpa_s, bss->bssid);
 486                         return;
 487                 }
 488                 params.sae_data = wpabuf_head(resp);
 489                 params.sae_data_len = wpabuf_len(resp);
 490                 wpa_s->sme.sae.state = start ? SAE_COMMITTED : SAE_CONFIRMED;
 491         }
 492 #endif /* CONFIG_SAE */
 493
 494         wpa_supplicant_cancel_sched_scan(wpa_s);
 495         wpa_supplicant_cancel_scan(wpa_s);
 496
 497         wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
 498                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 499                 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
 500
 501         wpa_clear_keys(wpa_s, bss->bssid);
 502         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 503         old_ssid = wpa_s->current_ssid;
 504         wpa_s->current_ssid = ssid;
 505         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
 506         wpa_supplicant_initiate_eapol(wpa_s);
 507         if (old_ssid != wpa_s->current_ssid)
 508                 wpas_notify_network_changed(wpa_s);
 509
 510 #ifdef CONFIG_P2P
 511         /*
 512          * If multi-channel concurrency is not supported, check for any
 513          * frequency conflict. In case of any frequency conflict, remove the
 514          * least prioritized connection.
 515          */
 516         if (wpa_s->num_multichan_concurrent < 2) {
 517                 int freq, num;
 518                 num = get_shared_radio_freqs(wpa_s, &freq, 1);
 519                 if (num > 0 && freq > 0 && freq != params.freq) {
 520                         wpa_printf(MSG_DEBUG,
 521                                    "Conflicting frequency found (%d != %d)",
 522                                    freq, params.freq);
 523                         if (wpas_p2p_handle_frequency_conflicts(wpa_s,
 524                                                                 params.freq,
 525                                                                 ssid) < 0) {
 526                                 wpas_connection_failed(wpa_s, bss->bssid);
 527                                 wpa_supplicant_mark_disassoc(wpa_s);
 528                                 wpabuf_free(resp);
 529                                 wpas_connect_work_done(wpa_s);
 530                                 return;
 531                         }
 532                 }
 533         }
 534 #endif /* CONFIG_P2P */
 535
 536         wpa_s->sme.auth_alg = params.auth_alg;
 537         if (wpa_drv_authenticate(wpa_s, &params) < 0) {
 538                 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
 539                         "driver failed");
 540                 wpas_connection_failed(wpa_s, bss->bssid);
 541                 wpa_supplicant_mark_disassoc(wpa_s);
 542                 wpabuf_free(resp);
 543                 wpas_connect_work_done(wpa_s);
 544                 return;
 545         }
 546
 547         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 548                                NULL);
 549
 550         /*
 551          * Association will be started based on the authentication event from
 552          * the driver.
 553          */
 554
 555         wpabuf_free(resp);
 556 }
 557
 558
 559 static void sme_auth_start_cb(struct wpa_radio_work *work, int deinit)
 560 {
 561         struct wpa_connect_work *cwork = work->ctx;
 562         struct wpa_supplicant *wpa_s = work->wpa_s;
 563
 564         if (deinit) {
 565                 if (work->started)
 566                         wpa_s->connect_work = NULL;
 567
 568                 wpas_connect_work_free(cwork);
 569                 return;
 570         }
 571
 572         wpa_s->connect_work = work;
 573
 574         if (cwork->bss_removed ||
 575             !wpas_valid_bss_ssid(wpa_s, cwork->bss, cwork->ssid)) {
 576                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: BSS/SSID entry for authentication not valid anymore - drop connection attempt");
 577                 wpas_connect_work_done(wpa_s);
 578                 return;
 579         }
 580
 581         sme_send_authentication(wpa_s, cwork->bss, cwork->ssid, 1);
 582 }
 583
 584
 585 void sme_authenticate(struct wpa_supplicant *wpa_s,
 586                       struct wpa_bss *bss, struct wpa_ssid *ssid)
 587 {
 588         struct wpa_connect_work *cwork;
 589
 590         if (bss == NULL || ssid == NULL)
 591                 return;
 592         if (wpa_s->connect_work) {
 593                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reject sme_authenticate() call since connect_work exist");
 594                 return;
 595         }
 596
 597         if (radio_work_pending(wpa_s, "sme-connect")) {
 598                 /*
 599                  * The previous sme-connect work might no longer be valid due to
 600                  * the fact that the BSS list was updated. In addition, it makes
 601                  * sense to adhere to the 'newer' decision.
 602                  */
 603                 wpa_dbg(wpa_s, MSG_DEBUG,
 604                         "SME: Remove previous pending sme-connect");
 605                 radio_remove_works(wpa_s, "sme-connect", 0);
 606         }
 607
 608         cwork = os_zalloc(sizeof(*cwork));
 609         if (cwork == NULL)
 610                 return;
 611         cwork->bss = bss;
 612         cwork->ssid = ssid;
 613         cwork->sme = 1;
 614
 615 #ifdef CONFIG_SAE
 616         wpa_s->sme.sae.state = SAE_NOTHING;
 617         wpa_s->sme.sae.send_confirm = 0;
 618         wpa_s->sme.sae_group_index = 0;
 619 #endif /* CONFIG_SAE */
 620
 621         if (radio_add_work(wpa_s, bss->freq, "sme-connect", 1,
 622                            sme_auth_start_cb, cwork) < 0)
 623                 wpas_connect_work_free(cwork);
 624 }
 625
 626
 627 #ifdef CONFIG_SAE
 628
 629 static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
 630                         u16 status_code, const u8 *data, size_t len)
 631 {
 632         int *groups;
 633
 634         wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
 635                 "status code %u", auth_transaction, status_code);
 636
 637         if (auth_transaction == 1 &&
 638             status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
 639             wpa_s->sme.sae.state == SAE_COMMITTED &&
 640             wpa_s->current_bss && wpa_s->current_ssid) {
 641                 int default_groups[] = { 19, 20, 21, 25, 26, 0 };
 642                 u16 group;
 643
 644                 groups = wpa_s->conf->sae_groups;
 645                 if (!groups || groups[0] <= 0)
 646                         groups = default_groups;
 647
 648                 if (len < sizeof(le16)) {
 649                         wpa_dbg(wpa_s, MSG_DEBUG,
 650                                 "SME: Too short SAE anti-clogging token request");
 651                         return -1;
 652                 }
 653                 group = WPA_GET_LE16(data);
 654                 wpa_dbg(wpa_s, MSG_DEBUG,
 655                         "SME: SAE anti-clogging token requested (group %u)",
 656                         group);
 657                 if (sae_group_allowed(&wpa_s->sme.sae, groups, group) !=
 658                     WLAN_STATUS_SUCCESS) {
 659                         wpa_dbg(wpa_s, MSG_ERROR,
 660                                 "SME: SAE group %u of anti-clogging request is invalid",
 661                                 group);
 662                         return -1;
 663                 }
 664                 wpabuf_free(wpa_s->sme.sae_token);
 665                 wpa_s->sme.sae_token = wpabuf_alloc_copy(data + sizeof(le16),
 666                                                          len - sizeof(le16));
 667                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 668                                         wpa_s->current_ssid, 1);
 669                 return 0;
 670         }
 671
 672         if (auth_transaction == 1 &&
 673             status_code == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED &&
 674             wpa_s->sme.sae.state == SAE_COMMITTED &&
 675             wpa_s->current_bss && wpa_s->current_ssid) {
 676                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE group not supported");
 677                 wpa_s->sme.sae_group_index++;
 678                 if (sme_set_sae_group(wpa_s) < 0)
 679                         return -1; /* no other groups enabled */
 680                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Try next enabled SAE group");
 681                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 682                                         wpa_s->current_ssid, 1);
 683                 return 0;
 684         }
 685
 686         if (status_code != WLAN_STATUS_SUCCESS)
 687                 return -1;
 688
 689         if (auth_transaction == 1) {
 690                 groups = wpa_s->conf->sae_groups;
 691
 692                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
 693                 if (wpa_s->current_bss == NULL ||
 694                     wpa_s->current_ssid == NULL)
 695                         return -1;
 696                 if (wpa_s->sme.sae.state != SAE_COMMITTED)
 697                         return -1;
 698                 if (groups && groups[0] <= 0)
 699                         groups = NULL;
 700                 if (sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL,
 701                                      groups) != WLAN_STATUS_SUCCESS)
 702                         return -1;
 703
 704                 if (sae_process_commit(&wpa_s->sme.sae) < 0) {
 705                         wpa_printf(MSG_DEBUG, "SAE: Failed to process peer "
 706                                    "commit");
 707                         return -1;
 708                 }
 709
 710                 wpabuf_free(wpa_s->sme.sae_token);
 711                 wpa_s->sme.sae_token = NULL;
 712                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 713                                         wpa_s->current_ssid, 0);
 714                 return 0;
 715         } else if (auth_transaction == 2) {
 716                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
 717                 if (wpa_s->sme.sae.state != SAE_CONFIRMED)
 718                         return -1;
 719                 if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0)
 720                         return -1;
 721                 wpa_s->sme.sae.state = SAE_ACCEPTED;
 722                 sae_clear_temp_data(&wpa_s->sme.sae);
 723                 return 1;
 724         }
 725
 726         return -1;
 727 }
 728 #endif /* CONFIG_SAE */
 729
 730
 731 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
 732 {
 733         struct wpa_ssid *ssid = wpa_s->current_ssid;
 734
 735         if (ssid == NULL) {
 736                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 737                         "when network is not selected");
 738                 return;
 739         }
 740
 741         if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
 742                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 743                         "when not in authenticating state");
 744                 return;
 745         }
 746
 747         if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
 748                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
 749                         "unexpected peer " MACSTR,
 750                         MAC2STR(data->auth.peer));
 751                 return;
 752         }
 753
 754         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
 755                 " auth_type=%d auth_transaction=%d status_code=%d",
 756                 MAC2STR(data->auth.peer), data->auth.auth_type,
 757                 data->auth.auth_transaction, data->auth.status_code);
 758         wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
 759                     data->auth.ies, data->auth.ies_len);
 760
 761         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 762
 763 #ifdef CONFIG_SAE
 764         if (data->auth.auth_type == WLAN_AUTH_SAE) {
 765                 int res;
 766                 res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
 767                                    data->auth.status_code, data->auth.ies,
 768                                    data->auth.ies_len);
 769                 if (res < 0) {
 770                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 771                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 772
 773                 }
 774                 if (res != 1)
 775                         return;
 776
 777                 wpa_printf(MSG_DEBUG, "SME: SAE completed - setting PMK for "
 778                            "4-way handshake");
 779                 wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN,
 780                                wpa_s->pending_bssid);
 781         }
 782 #endif /* CONFIG_SAE */
 783
 784         if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
 785                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
 786                         "code %d)", data->auth.status_code);
 787
 788                 if (data->auth.status_code !=
 789                     WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
 790                     wpa_s->sme.auth_alg == data->auth.auth_type ||
 791                     wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
 792                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 793                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 794                         return;
 795                 }
 796
 797                 wpas_connect_work_done(wpa_s);
 798
 799                 switch (data->auth.auth_type) {
 800                 case WLAN_AUTH_OPEN:
 801                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 802
 803                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
 804                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 805                                                  wpa_s->current_ssid);
 806                         return;
 807
 808                 case WLAN_AUTH_SHARED_KEY:
 809                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
 810
 811                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
 812                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 813                                                  wpa_s->current_ssid);
 814                         return;
 815
 816                 default:
 817                         return;
 818                 }
 819         }
 820
 821 #ifdef CONFIG_IEEE80211R
 822         if (data->auth.auth_type == WLAN_AUTH_FT) {
 823                 union wpa_event_data edata;
 824                 os_memset(&edata, 0, sizeof(edata));
 825                 edata.ft_ies.ies = data->auth.ies;
 826                 edata.ft_ies.ies_len = data->auth.ies_len;
 827                 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
 828                 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
 829         }
 830 #endif /* CONFIG_IEEE80211R */
 831
 832         sme_associate(wpa_s, ssid->mode, data->auth.peer,
 833                       data->auth.auth_type);
 834 }
 835
 836
 837 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
 838                    const u8 *bssid, u16 auth_type)
 839 {
 840         struct wpa_driver_associate_params params;
 841         struct ieee802_11_elems elems;
 842 #ifdef CONFIG_HT_OVERRIDES
 843         struct ieee80211_ht_capabilities htcaps;
 844         struct ieee80211_ht_capabilities htcaps_mask;
 845 #endif /* CONFIG_HT_OVERRIDES */
 846 #ifdef CONFIG_VHT_OVERRIDES
 847         struct ieee80211_vht_capabilities vhtcaps;
 848         struct ieee80211_vht_capabilities vhtcaps_mask;
 849 #endif /* CONFIG_VHT_OVERRIDES */
 850
 851         os_memset(&params, 0, sizeof(params));
 852         params.bssid = bssid;
 853         params.ssid = wpa_s->sme.ssid;
 854         params.ssid_len = wpa_s->sme.ssid_len;
 855         params.freq.freq = wpa_s->sme.freq;
 856         params.bg_scan_period = wpa_s->current_ssid ?
 857                 wpa_s->current_ssid->bg_scan_period : -1;
 858         params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
 859                 wpa_s->sme.assoc_req_ie : NULL;
 860         params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
 861         params.pairwise_suite = wpa_s->pairwise_cipher;
 862         params.group_suite = wpa_s->group_cipher;
 863         params.key_mgmt_suite = wpa_s->key_mgmt;
 864         params.wpa_proto = wpa_s->wpa_proto;
 865 #ifdef CONFIG_HT_OVERRIDES
 866         os_memset(&htcaps, 0, sizeof(htcaps));
 867         os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
 868         params.htcaps = (u8 *) &htcaps;
 869         params.htcaps_mask = (u8 *) &htcaps_mask;
 870         wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, &params);
 871 #endif /* CONFIG_HT_OVERRIDES */
 872 #ifdef CONFIG_VHT_OVERRIDES
 873         os_memset(&vhtcaps, 0, sizeof(vhtcaps));
 874         os_memset(&vhtcaps_mask, 0, sizeof(vhtcaps_mask));
 875         params.vhtcaps = &vhtcaps;
 876         params.vhtcaps_mask = &vhtcaps_mask;
 877         wpa_supplicant_apply_vht_overrides(wpa_s, wpa_s->current_ssid, &params);
 878 #endif /* CONFIG_VHT_OVERRIDES */
 879 #ifdef CONFIG_IEEE80211R
 880         if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
 881                 params.wpa_ie = wpa_s->sme.ft_ies;
 882                 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
 883         }
 884 #endif /* CONFIG_IEEE80211R */
 885         params.mode = mode;
 886         params.mgmt_frame_protection = wpa_s->sme.mfp;
 887         params.rrm_used = wpa_s->rrm.rrm_used;
 888         if (wpa_s->sme.prev_bssid_set)
 889                 params.prev_bssid = wpa_s->sme.prev_bssid;
 890
 891         wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
 892                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 893                 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
 894                 params.freq.freq);
 895
 896         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
 897
 898         if (params.wpa_ie == NULL ||
 899             ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
 900             < 0) {
 901                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
 902                 os_memset(&elems, 0, sizeof(elems));
 903         }
 904         if (elems.rsn_ie) {
 905                 params.wpa_proto = WPA_PROTO_RSN;
 906                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
 907                                         elems.rsn_ie_len + 2);
 908         } else if (elems.wpa_ie) {
 909                 params.wpa_proto = WPA_PROTO_WPA;
 910                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
 911                                         elems.wpa_ie_len + 2);
 912         } else if (elems.osen) {
 913                 params.wpa_proto = WPA_PROTO_OSEN;
 914                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.osen - 2,
 915                                         elems.osen_len + 2);
 916         } else
 917                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 918         if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
 919                 params.p2p = 1;
 920
 921         if (wpa_s->parent->set_sta_uapsd)
 922                 params.uapsd = wpa_s->parent->sta_uapsd;
 923         else
 924                 params.uapsd = -1;
 925
 926         if (wpa_drv_associate(wpa_s, &params) < 0) {
 927                 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
 928                         "driver failed");
 929                 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 930                 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 931                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 932                 return;
 933         }
 934
 935         eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
 936                                NULL);
 937 }
 938
 939
 940 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
 941                       const u8 *ies, size_t ies_len)
 942 {
 943         if (md == NULL || ies == NULL) {
 944                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
 945                 os_free(wpa_s->sme.ft_ies);
 946                 wpa_s->sme.ft_ies = NULL;
 947                 wpa_s->sme.ft_ies_len = 0;
 948                 wpa_s->sme.ft_used = 0;
 949                 return 0;
 950         }
 951
 952         os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
 953         wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
 954         os_free(wpa_s->sme.ft_ies);
 955         wpa_s->sme.ft_ies = os_malloc(ies_len);
 956         if (wpa_s->sme.ft_ies == NULL)
 957                 return -1;
 958         os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
 959         wpa_s->sme.ft_ies_len = ies_len;
 960         return 0;
 961 }
 962
 963
 964 static void sme_deauth(struct wpa_supplicant *wpa_s)
 965 {
 966         int bssid_changed;
 967
 968         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 969
 970         if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
 971                                    WLAN_REASON_DEAUTH_LEAVING) < 0) {
 972                 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
 973                         "failed");
 974         }
 975         wpa_s->sme.prev_bssid_set = 0;
 976
 977         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 978         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 979         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 980         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 981         if (bssid_changed)
 982                 wpas_notify_bssid_changed(wpa_s);
 983 }
 984
 985
 986 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
 987                             union wpa_event_data *data)
 988 {
 989         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
 990                 "status code %d", MAC2STR(wpa_s->pending_bssid),
 991                 data->assoc_reject.status_code);
 992
 993         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 994
 995 #ifdef CONFIG_SAE
 996         if (wpa_s->sme.sae_pmksa_caching && wpa_s->current_ssid &&
 997             wpa_key_mgmt_sae(wpa_s->current_ssid->key_mgmt)) {
 998                 wpa_dbg(wpa_s, MSG_DEBUG,
 999                         "PMKSA caching attempt rejected - drop PMKSA cache entry and fall back to SAE authentication");
1000                 wpa_sm_aborted_cached(wpa_s->wpa);
1001                 wpa_sm_pmksa_cache_flush(wpa_s->wpa, wpa_s->current_ssid);
1002                 if (wpa_s->current_bss) {
1003                         struct wpa_bss *bss = wpa_s->current_bss;
1004                         struct wpa_ssid *ssid = wpa_s->current_ssid;
1005
1006                         wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
1007                                                WLAN_REASON_DEAUTH_LEAVING);
1008                         wpas_connect_work_done(wpa_s);
1009                         wpa_supplicant_mark_disassoc(wpa_s);
1010                         wpa_supplicant_connect(wpa_s, bss, ssid);
1011                         return;
1012                 }
1013         }
1014 #endif /* CONFIG_SAE */
1015
1016         /*
1017          * For now, unconditionally terminate the previous authentication. In
1018          * theory, this should not be needed, but mac80211 gets quite confused
1019          * if the authentication is left pending.. Some roaming cases might
1020          * benefit from using the previous authentication, so this could be
1021          * optimized in the future.
1022          */
1023         sme_deauth(wpa_s);
1024 }
1025
1026
1027 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
1028                               union wpa_event_data *data)
1029 {
1030         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
1031         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1032         wpa_supplicant_mark_disassoc(wpa_s);
1033 }
1034
1035
1036 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
1037                                union wpa_event_data *data)
1038 {
1039         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
1040         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1041         wpa_supplicant_mark_disassoc(wpa_s);
1042 }
1043
1044
1045 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
1046                         struct disassoc_info *info)
1047 {
1048         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
1049         if (wpa_s->sme.prev_bssid_set) {
1050                 /*
1051                  * cfg80211/mac80211 can get into somewhat confused state if
1052                  * the AP only disassociates us and leaves us in authenticated
1053                  * state. For now, force the state to be cleared to avoid
1054                  * confusing errors if we try to associate with the AP again.
1055                  */
1056                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
1057                         "driver state");
1058                 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
1059                                        WLAN_REASON_DEAUTH_LEAVING);
1060         }
1061 }
1062
1063
1064 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
1065 {
1066         struct wpa_supplicant *wpa_s = eloop_ctx;
1067         if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
1068                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
1069                 sme_deauth(wpa_s);
1070         }
1071 }
1072
1073
1074 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
1075 {
1076         struct wpa_supplicant *wpa_s = eloop_ctx;
1077         if (wpa_s->wpa_state == WPA_ASSOCIATING) {
1078                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
1079                 sme_deauth(wpa_s);
1080         }
1081 }
1082
1083
1084 void sme_state_changed(struct wpa_supplicant *wpa_s)
1085 {
1086         /* Make sure timers are cleaned up appropriately. */
1087         if (wpa_s->wpa_state != WPA_ASSOCIATING)
1088                 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1089         if (wpa_s->wpa_state != WPA_AUTHENTICATING)
1090                 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1091 }
1092
1093
1094 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
1095                                        const u8 *prev_pending_bssid)
1096 {
1097         /*
1098          * mac80211-workaround to force deauth on failed auth cmd,
1099          * requires us to remain in authenticating state to allow the
1100          * second authentication attempt to be continued properly.
1101          */
1102         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
1103                 "to proceed after disconnection event");
1104         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
1105         os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
1106
1107         /*
1108          * Re-arm authentication timer in case auth fails for whatever reason.
1109          */
1110         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1111         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
1112                                NULL);
1113 }
1114
1115
1116 void sme_clear_on_disassoc(struct wpa_supplicant *wpa_s)
1117 {
1118         wpa_s->sme.prev_bssid_set = 0;
1119 #ifdef CONFIG_SAE
1120         wpabuf_free(wpa_s->sme.sae_token);
1121         wpa_s->sme.sae_token = NULL;
1122         sae_clear_data(&wpa_s->sme.sae);
1123 #endif /* CONFIG_SAE */
1124 #ifdef CONFIG_IEEE80211R
1125         if (wpa_s->sme.ft_ies)
1126                 sme_update_ft_ies(wpa_s, NULL, NULL, 0);
1127 #endif /* CONFIG_IEEE80211R */
1128 }
1129
1130
1131 void sme_deinit(struct wpa_supplicant *wpa_s)
1132 {
1133         os_free(wpa_s->sme.ft_ies);
1134         wpa_s->sme.ft_ies = NULL;
1135         wpa_s->sme.ft_ies_len = 0;
1136 #ifdef CONFIG_IEEE80211W
1137         sme_stop_sa_query(wpa_s);
1138 #endif /* CONFIG_IEEE80211W */
1139         sme_clear_on_disassoc(wpa_s);
1140
1141         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1142         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1143         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1144 }
1145
1146
1147 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
1148                                    const u8 *chan_list, u8 num_channels,
1149                                    u8 num_intol)
1150 {
1151         struct ieee80211_2040_bss_coex_ie *bc_ie;
1152         struct ieee80211_2040_intol_chan_report *ic_report;
1153         struct wpabuf *buf;
1154
1155         wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR
1156                    " (num_channels=%u num_intol=%u)",
1157                    MAC2STR(wpa_s->bssid), num_channels, num_intol);
1158         wpa_hexdump(MSG_DEBUG, "SME: 20/40 BSS Intolerant Channels",
1159                     chan_list, num_channels);
1160
1161         buf = wpabuf_alloc(2 + /* action.category + action_code */
1162                            sizeof(struct ieee80211_2040_bss_coex_ie) +
1163                            sizeof(struct ieee80211_2040_intol_chan_report) +
1164                            num_channels);
1165         if (buf == NULL)
1166                 return;
1167
1168         wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
1169         wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
1170
1171         bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
1172         bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
1173         bc_ie->length = 1;
1174         if (num_intol)
1175                 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
1176
1177         if (num_channels > 0) {
1178                 ic_report = wpabuf_put(buf, sizeof(*ic_report));
1179                 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
1180                 ic_report->length = num_channels + 1;
1181                 ic_report->op_class = 0;
1182                 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
1183                           num_channels);
1184         }
1185
1186         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1187                                 wpa_s->own_addr, wpa_s->bssid,
1188                                 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
1189                 wpa_msg(wpa_s, MSG_INFO,
1190                         "SME: Failed to send 20/40 BSS Coexistence frame");
1191         }
1192
1193         wpabuf_free(buf);
1194 }
1195
1196
1197 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
1198 {
1199         struct wpa_bss *bss;
1200         const u8 *ie;
1201         u16 ht_cap;
1202         u8 chan_list[P2P_MAX_CHANNELS], channel;
1203         u8 num_channels = 0, num_intol = 0, i;
1204
1205         if (!wpa_s->sme.sched_obss_scan)
1206                 return 0;
1207
1208         wpa_s->sme.sched_obss_scan = 0;
1209         if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
1210                 return 1;
1211
1212         /*
1213          * Check whether AP uses regulatory triplet or channel triplet in
1214          * country info. Right now the operating class of the BSS channel
1215          * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
1216          * based on the assumption that operating class triplet is not used in
1217          * beacon frame. If the First Channel Number/Operating Extension
1218          * Identifier octet has a positive integer value of 201 or greater,
1219          * then its operating class triplet.
1220          *
1221          * TODO: If Supported Operating Classes element is present in beacon
1222          * frame, have to lookup operating class in Annex E and fill them in
1223          * 2040 coex frame.
1224          */
1225         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
1226         if (ie && (ie[1] >= 6) && (ie[5] >= 201))
1227                 return 1;
1228
1229         os_memset(chan_list, 0, sizeof(chan_list));
1230
1231         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1232                 /* Skip other band bss */
1233                 enum hostapd_hw_mode mode;
1234                 mode = ieee80211_freq_to_chan(bss->freq, &channel);
1235                 if (mode != HOSTAPD_MODE_IEEE80211G &&
1236                     mode != HOSTAPD_MODE_IEEE80211B)
1237                         continue;
1238
1239                 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
1240                 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
1241                 wpa_printf(MSG_DEBUG, "SME OBSS scan BSS " MACSTR
1242                            " freq=%u chan=%u ht_cap=0x%x",
1243                            MAC2STR(bss->bssid), bss->freq, channel, ht_cap);
1244
1245                 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
1246                         if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
1247                                 num_intol++;
1248
1249                         /* Check whether the channel is already considered */
1250                         for (i = 0; i < num_channels; i++) {
1251                                 if (channel == chan_list[i])
1252                                         break;
1253                         }
1254                         if (i != num_channels)
1255                                 continue;
1256
1257                         chan_list[num_channels++] = channel;
1258                 }
1259         }
1260
1261         sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
1262         return 1;
1263 }
1264
1265
1266 static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
1267                                           u16 num_modes,
1268                                           enum hostapd_hw_mode mode)
1269 {
1270         u16 i;
1271
1272         for (i = 0; i < num_modes; i++) {
1273                 if (modes[i].mode == mode)
1274                         return &modes[i];
1275         }
1276
1277         return NULL;
1278 }
1279
1280
1281 static void wpa_obss_scan_freqs_list(struct wpa_supplicant *wpa_s,
1282                                      struct wpa_driver_scan_params *params)
1283 {
1284         /* Include only affected channels */
1285         struct hostapd_hw_modes *mode;
1286         int count, i;
1287         int start, end;
1288
1289         mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes,
1290                         HOSTAPD_MODE_IEEE80211G);
1291         if (mode == NULL) {
1292                 /* No channels supported in this band - use empty list */
1293                 params->freqs = os_zalloc(sizeof(int));
1294                 return;
1295         }
1296
1297         if (wpa_s->sme.ht_sec_chan == HT_SEC_CHAN_UNKNOWN &&
1298             wpa_s->current_bss) {
1299                 const u8 *ie;
1300
1301                 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_OPERATION);
1302                 if (ie && ie[1] >= 2) {
1303                         u8 o;
1304
1305                         o = ie[3] & HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK;
1306                         if (o == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
1307                                 wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_ABOVE;
1308                         else if (o == HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
1309                                 wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_BELOW;
1310                 }
1311         }
1312
1313         start = wpa_s->assoc_freq - 10;
1314         end = wpa_s->assoc_freq + 10;
1315         switch (wpa_s->sme.ht_sec_chan) {
1316         case HT_SEC_CHAN_UNKNOWN:
1317                 /* HT40+ possible on channels 1..9 */
1318                 if (wpa_s->assoc_freq <= 2452)
1319                         start -= 20;
1320                 /* HT40- possible on channels 5-13 */
1321                 if (wpa_s->assoc_freq >= 2432)
1322                         end += 20;
1323                 break;
1324         case HT_SEC_CHAN_ABOVE:
1325                 end += 20;
1326                 break;
1327         case HT_SEC_CHAN_BELOW:
1328                 start -= 20;
1329                 break;
1330         }
1331         wpa_printf(MSG_DEBUG,
1332                    "OBSS: assoc_freq %d possible affected range %d-%d",
1333                    wpa_s->assoc_freq, start, end);
1334
1335         params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
1336         if (params->freqs == NULL)
1337                 return;
1338         for (count = 0, i = 0; i < mode->num_channels; i++) {
1339                 int freq;
1340
1341                 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
1342                         continue;
1343                 freq = mode->channels[i].freq;
1344                 if (freq - 10 >= end || freq + 10 <= start)
1345                         continue; /* not affected */
1346                 params->freqs[count++] = freq;
1347         }
1348 }
1349
1350
1351 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1352 {
1353         struct wpa_supplicant *wpa_s = eloop_ctx;
1354         struct wpa_driver_scan_params params;
1355
1356         if (!wpa_s->current_bss) {
1357                 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
1358                 return;
1359         }
1360
1361         os_memset(&params, 0, sizeof(params));
1362         wpa_obss_scan_freqs_list(wpa_s, &params);
1363         params.low_priority = 1;
1364         wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
1365
1366         if (wpa_supplicant_trigger_scan(wpa_s, &params))
1367                 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
1368         else
1369                 wpa_s->sme.sched_obss_scan = 1;
1370         os_free(params.freqs);
1371
1372         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1373                                sme_obss_scan_timeout, wpa_s, NULL);
1374 }
1375
1376
1377 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
1378 {
1379         const u8 *ie;
1380         struct wpa_bss *bss = wpa_s->current_bss;
1381         struct wpa_ssid *ssid = wpa_s->current_ssid;
1382         struct hostapd_hw_modes *hw_mode = NULL;
1383         int i;
1384
1385         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1386         wpa_s->sme.sched_obss_scan = 0;
1387         wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_UNKNOWN;
1388         if (!enable)
1389                 return;
1390
1391         /*
1392          * Schedule OBSS scan if driver is using station SME in wpa_supplicant
1393          * or it expects OBSS scan to be performed by wpa_supplicant.
1394          */
1395         if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
1396               (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
1397             ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
1398                 return;
1399
1400         if (!wpa_s->hw.modes)
1401                 return;
1402
1403         /* only HT caps in 11g mode are relevant */
1404         for (i = 0; i < wpa_s->hw.num_modes; i++) {
1405                 hw_mode = &wpa_s->hw.modes[i];
1406                 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
1407                         break;
1408         }
1409
1410         /* Driver does not support HT40 for 11g or doesn't have 11g. */
1411         if (i == wpa_s->hw.num_modes || !hw_mode ||
1412             !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1413                 return;
1414
1415         if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
1416                 return; /* Not associated on 2.4 GHz band */
1417
1418         /* Check whether AP supports HT40 */
1419         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
1420         if (!ie || ie[1] < 2 ||
1421             !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1422                 return; /* AP does not support HT40 */
1423
1424         ie = wpa_bss_get_ie(wpa_s->current_bss,
1425                             WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
1426         if (!ie || ie[1] < 14)
1427                 return; /* AP does not request OBSS scans */
1428
1429         wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
1430         if (wpa_s->sme.obss_scan_int < 10) {
1431                 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
1432                            "replaced with the minimum 10 sec",
1433                            wpa_s->sme.obss_scan_int);
1434                 wpa_s->sme.obss_scan_int = 10;
1435         }
1436         wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
1437                    wpa_s->sme.obss_scan_int);
1438         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1439                                sme_obss_scan_timeout, wpa_s, NULL);
1440 }
1441
1442
1443 #ifdef CONFIG_IEEE80211W
1444
1445 static const unsigned int sa_query_max_timeout = 1000;
1446 static const unsigned int sa_query_retry_timeout = 201;
1447
1448 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
1449 {
1450         u32 tu;
1451         struct os_reltime now, passed;
1452         os_get_reltime(&now);
1453         os_reltime_sub(&now, &wpa_s->sme.sa_query_start, &passed);
1454         tu = (passed.sec * 1000000 + passed.usec) / 1024;
1455         if (sa_query_max_timeout < tu) {
1456                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
1457                 sme_stop_sa_query(wpa_s);
1458                 wpa_supplicant_deauthenticate(
1459                         wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
1460                 return 1;
1461         }
1462
1463         return 0;
1464 }
1465
1466
1467 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
1468                                   const u8 *trans_id)
1469 {
1470         u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
1471         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
1472                 MACSTR, MAC2STR(wpa_s->bssid));
1473         wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
1474                     trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1475         req[0] = WLAN_ACTION_SA_QUERY;
1476         req[1] = WLAN_SA_QUERY_REQUEST;
1477         os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1478         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1479                                 wpa_s->own_addr, wpa_s->bssid,
1480                                 req, sizeof(req), 0) < 0)
1481                 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
1482                         "Request");
1483 }
1484
1485
1486 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
1487 {
1488         struct wpa_supplicant *wpa_s = eloop_ctx;
1489         unsigned int timeout, sec, usec;
1490         u8 *trans_id, *nbuf;
1491
1492         if (wpa_s->sme.sa_query_count > 0 &&
1493             sme_check_sa_query_timeout(wpa_s))
1494                 return;
1495
1496         nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
1497                                 wpa_s->sme.sa_query_count + 1,
1498                                 WLAN_SA_QUERY_TR_ID_LEN);
1499         if (nbuf == NULL)
1500                 return;
1501         if (wpa_s->sme.sa_query_count == 0) {
1502                 /* Starting a new SA Query procedure */
1503                 os_get_reltime(&wpa_s->sme.sa_query_start);
1504         }
1505         trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
1506         wpa_s->sme.sa_query_trans_id = nbuf;
1507         wpa_s->sme.sa_query_count++;
1508
1509         if (os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN) < 0) {
1510                 wpa_printf(MSG_DEBUG, "Could not generate SA Query ID");
1511                 return;
1512         }
1513
1514         timeout = sa_query_retry_timeout;
1515         sec = ((timeout / 1000) * 1024) / 1000;
1516         usec = (timeout % 1000) * 1024;
1517         eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
1518
1519         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
1520                 wpa_s->sme.sa_query_count);
1521
1522         sme_send_sa_query_req(wpa_s, trans_id);
1523 }
1524
1525
1526 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
1527 {
1528         sme_sa_query_timer(wpa_s, NULL);
1529 }
1530
1531
1532 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
1533 {
1534         eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
1535         os_free(wpa_s->sme.sa_query_trans_id);
1536         wpa_s->sme.sa_query_trans_id = NULL;
1537         wpa_s->sme.sa_query_count = 0;
1538 }
1539
1540
1541 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1542                                  const u8 *da, u16 reason_code)
1543 {
1544         struct wpa_ssid *ssid;
1545         struct os_reltime now;
1546
1547         if (wpa_s->wpa_state != WPA_COMPLETED)
1548                 return;
1549         ssid = wpa_s->current_ssid;
1550         if (ssid == NULL ||
1551             (ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
1552              wpa_s->conf->pmf : ssid->ieee80211w) == NO_MGMT_FRAME_PROTECTION)
1553                 return;
1554         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1555                 return;
1556         if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1557             reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1558                 return;
1559         if (wpa_s->sme.sa_query_count > 0)
1560                 return;
1561
1562         os_get_reltime(&now);
1563         if (wpa_s->sme.last_unprot_disconnect.sec &&
1564             !os_reltime_expired(&now, &wpa_s->sme.last_unprot_disconnect, 10))
1565                 return; /* limit SA Query procedure frequency */
1566         wpa_s->sme.last_unprot_disconnect = now;
1567
1568         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1569                 "possible AP/STA state mismatch - trigger SA Query");
1570         sme_start_sa_query(wpa_s);
1571 }
1572
1573
1574 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1575                      const u8 *data, size_t len)
1576 {
1577         int i;
1578
1579         if (wpa_s->sme.sa_query_trans_id == NULL ||
1580             len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1581             data[0] != WLAN_SA_QUERY_RESPONSE)
1582                 return;
1583         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1584                 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1585
1586         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1587                 return;
1588
1589         for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1590                 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1591                               i * WLAN_SA_QUERY_TR_ID_LEN,
1592                               data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1593                         break;
1594         }
1595
1596         if (i >= wpa_s->sme.sa_query_count) {
1597                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1598                         "transaction identifier found");
1599                 return;
1600         }
1601
1602         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1603                 "from " MACSTR, MAC2STR(sa));
1604         sme_stop_sa_query(wpa_s);
1605 }
1606
1607 #endif /* CONFIG_IEEE80211W */