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                 if (wpa_ft_process_response(wpa_s->wpa, data->auth.ies,
 835                                             data->auth.ies_len, 0,
 836                                             data->auth.peer, NULL, 0) < 0) {
 837                         wpa_dbg(wpa_s, MSG_DEBUG,
 838                                 "SME: FT Authentication response processing failed");
 839                         wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "bssid="
 840                                 MACSTR
 841                                 " reason=%d locally_generated=1",
 842                                 MAC2STR(wpa_s->pending_bssid),
 843                                 WLAN_REASON_DEAUTH_LEAVING);
 844                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 845                         wpa_supplicant_mark_disassoc(wpa_s);
 846                         return;
 847                 }
 848         }
 849 #endif /* CONFIG_IEEE80211R */
 850
 851         sme_associate(wpa_s, ssid->mode, data->auth.peer,
 852                       data->auth.auth_type);
 853 }
 854
 855
 856 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
 857                    const u8 *bssid, u16 auth_type)
 858 {
 859         struct wpa_driver_associate_params params;
 860         struct ieee802_11_elems elems;
 861 #ifdef CONFIG_HT_OVERRIDES
 862         struct ieee80211_ht_capabilities htcaps;
 863         struct ieee80211_ht_capabilities htcaps_mask;
 864 #endif /* CONFIG_HT_OVERRIDES */
 865 #ifdef CONFIG_VHT_OVERRIDES
 866         struct ieee80211_vht_capabilities vhtcaps;
 867         struct ieee80211_vht_capabilities vhtcaps_mask;
 868 #endif /* CONFIG_VHT_OVERRIDES */
 869
 870         os_memset(&params, 0, sizeof(params));
 871         params.bssid = bssid;
 872         params.ssid = wpa_s->sme.ssid;
 873         params.ssid_len = wpa_s->sme.ssid_len;
 874         params.freq.freq = wpa_s->sme.freq;
 875         params.bg_scan_period = wpa_s->current_ssid ?
 876                 wpa_s->current_ssid->bg_scan_period : -1;
 877         params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
 878                 wpa_s->sme.assoc_req_ie : NULL;
 879         params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
 880         params.pairwise_suite = wpa_s->pairwise_cipher;
 881         params.group_suite = wpa_s->group_cipher;
 882         params.key_mgmt_suite = wpa_s->key_mgmt;
 883         params.wpa_proto = wpa_s->wpa_proto;
 884 #ifdef CONFIG_HT_OVERRIDES
 885         os_memset(&htcaps, 0, sizeof(htcaps));
 886         os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
 887         params.htcaps = (u8 *) &htcaps;
 888         params.htcaps_mask = (u8 *) &htcaps_mask;
 889         wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, &params);
 890 #endif /* CONFIG_HT_OVERRIDES */
 891 #ifdef CONFIG_VHT_OVERRIDES
 892         os_memset(&vhtcaps, 0, sizeof(vhtcaps));
 893         os_memset(&vhtcaps_mask, 0, sizeof(vhtcaps_mask));
 894         params.vhtcaps = &vhtcaps;
 895         params.vhtcaps_mask = &vhtcaps_mask;
 896         wpa_supplicant_apply_vht_overrides(wpa_s, wpa_s->current_ssid, &params);
 897 #endif /* CONFIG_VHT_OVERRIDES */
 898 #ifdef CONFIG_IEEE80211R
 899         if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
 900                 params.wpa_ie = wpa_s->sme.ft_ies;
 901                 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
 902         }
 903 #endif /* CONFIG_IEEE80211R */
 904         params.mode = mode;
 905         params.mgmt_frame_protection = wpa_s->sme.mfp;
 906         params.rrm_used = wpa_s->rrm.rrm_used;
 907         if (wpa_s->sme.prev_bssid_set)
 908                 params.prev_bssid = wpa_s->sme.prev_bssid;
 909
 910         wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
 911                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 912                 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
 913                 params.freq.freq);
 914
 915         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
 916
 917         if (params.wpa_ie == NULL ||
 918             ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
 919             < 0) {
 920                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
 921                 os_memset(&elems, 0, sizeof(elems));
 922         }
 923         if (elems.rsn_ie) {
 924                 params.wpa_proto = WPA_PROTO_RSN;
 925                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
 926                                         elems.rsn_ie_len + 2);
 927         } else if (elems.wpa_ie) {
 928                 params.wpa_proto = WPA_PROTO_WPA;
 929                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
 930                                         elems.wpa_ie_len + 2);
 931         } else if (elems.osen) {
 932                 params.wpa_proto = WPA_PROTO_OSEN;
 933                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.osen - 2,
 934                                         elems.osen_len + 2);
 935         } else
 936                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 937         if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
 938                 params.p2p = 1;
 939
 940         if (wpa_s->parent->set_sta_uapsd)
 941                 params.uapsd = wpa_s->parent->sta_uapsd;
 942         else
 943                 params.uapsd = -1;
 944
 945         if (wpa_drv_associate(wpa_s, &params) < 0) {
 946                 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
 947                         "driver failed");
 948                 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 949                 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 950                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 951                 return;
 952         }
 953
 954         eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
 955                                NULL);
 956 }
 957
 958
 959 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
 960                       const u8 *ies, size_t ies_len)
 961 {
 962         if (md == NULL || ies == NULL) {
 963                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
 964                 os_free(wpa_s->sme.ft_ies);
 965                 wpa_s->sme.ft_ies = NULL;
 966                 wpa_s->sme.ft_ies_len = 0;
 967                 wpa_s->sme.ft_used = 0;
 968                 return 0;
 969         }
 970
 971         os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
 972         wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
 973         os_free(wpa_s->sme.ft_ies);
 974         wpa_s->sme.ft_ies = os_malloc(ies_len);
 975         if (wpa_s->sme.ft_ies == NULL)
 976                 return -1;
 977         os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
 978         wpa_s->sme.ft_ies_len = ies_len;
 979         return 0;
 980 }
 981
 982
 983 static void sme_deauth(struct wpa_supplicant *wpa_s)
 984 {
 985         int bssid_changed;
 986
 987         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 988
 989         if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
 990                                    WLAN_REASON_DEAUTH_LEAVING) < 0) {
 991                 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
 992                         "failed");
 993         }
 994         wpa_s->sme.prev_bssid_set = 0;
 995
 996         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 997         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 998         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 999         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1000         if (bssid_changed)
1001                 wpas_notify_bssid_changed(wpa_s);
1002 }
1003
1004
1005 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
1006                             union wpa_event_data *data)
1007 {
1008         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
1009                 "status code %d", MAC2STR(wpa_s->pending_bssid),
1010                 data->assoc_reject.status_code);
1011
1012         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1013
1014 #ifdef CONFIG_SAE
1015         if (wpa_s->sme.sae_pmksa_caching && wpa_s->current_ssid &&
1016             wpa_key_mgmt_sae(wpa_s->current_ssid->key_mgmt)) {
1017                 wpa_dbg(wpa_s, MSG_DEBUG,
1018                         "PMKSA caching attempt rejected - drop PMKSA cache entry and fall back to SAE authentication");
1019                 wpa_sm_aborted_cached(wpa_s->wpa);
1020                 wpa_sm_pmksa_cache_flush(wpa_s->wpa, wpa_s->current_ssid);
1021                 if (wpa_s->current_bss) {
1022                         struct wpa_bss *bss = wpa_s->current_bss;
1023                         struct wpa_ssid *ssid = wpa_s->current_ssid;
1024
1025                         wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
1026                                                WLAN_REASON_DEAUTH_LEAVING);
1027                         wpas_connect_work_done(wpa_s);
1028                         wpa_supplicant_mark_disassoc(wpa_s);
1029                         wpa_supplicant_connect(wpa_s, bss, ssid);
1030                         return;
1031                 }
1032         }
1033 #endif /* CONFIG_SAE */
1034
1035         /*
1036          * For now, unconditionally terminate the previous authentication. In
1037          * theory, this should not be needed, but mac80211 gets quite confused
1038          * if the authentication is left pending.. Some roaming cases might
1039          * benefit from using the previous authentication, so this could be
1040          * optimized in the future.
1041          */
1042         sme_deauth(wpa_s);
1043 }
1044
1045
1046 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
1047                               union wpa_event_data *data)
1048 {
1049         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
1050         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1051         wpa_supplicant_mark_disassoc(wpa_s);
1052 }
1053
1054
1055 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
1056                                union wpa_event_data *data)
1057 {
1058         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
1059         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1060         wpa_supplicant_mark_disassoc(wpa_s);
1061 }
1062
1063
1064 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
1065                         struct disassoc_info *info)
1066 {
1067         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
1068         if (wpa_s->sme.prev_bssid_set) {
1069                 /*
1070                  * cfg80211/mac80211 can get into somewhat confused state if
1071                  * the AP only disassociates us and leaves us in authenticated
1072                  * state. For now, force the state to be cleared to avoid
1073                  * confusing errors if we try to associate with the AP again.
1074                  */
1075                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
1076                         "driver state");
1077                 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
1078                                        WLAN_REASON_DEAUTH_LEAVING);
1079         }
1080 }
1081
1082
1083 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
1084 {
1085         struct wpa_supplicant *wpa_s = eloop_ctx;
1086         if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
1087                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
1088                 sme_deauth(wpa_s);
1089         }
1090 }
1091
1092
1093 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
1094 {
1095         struct wpa_supplicant *wpa_s = eloop_ctx;
1096         if (wpa_s->wpa_state == WPA_ASSOCIATING) {
1097                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
1098                 sme_deauth(wpa_s);
1099         }
1100 }
1101
1102
1103 void sme_state_changed(struct wpa_supplicant *wpa_s)
1104 {
1105         /* Make sure timers are cleaned up appropriately. */
1106         if (wpa_s->wpa_state != WPA_ASSOCIATING)
1107                 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1108         if (wpa_s->wpa_state != WPA_AUTHENTICATING)
1109                 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1110 }
1111
1112
1113 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
1114                                        const u8 *prev_pending_bssid)
1115 {
1116         /*
1117          * mac80211-workaround to force deauth on failed auth cmd,
1118          * requires us to remain in authenticating state to allow the
1119          * second authentication attempt to be continued properly.
1120          */
1121         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
1122                 "to proceed after disconnection event");
1123         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
1124         os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
1125
1126         /*
1127          * Re-arm authentication timer in case auth fails for whatever reason.
1128          */
1129         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1130         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
1131                                NULL);
1132 }
1133
1134
1135 void sme_clear_on_disassoc(struct wpa_supplicant *wpa_s)
1136 {
1137         wpa_s->sme.prev_bssid_set = 0;
1138 #ifdef CONFIG_SAE
1139         wpabuf_free(wpa_s->sme.sae_token);
1140         wpa_s->sme.sae_token = NULL;
1141         sae_clear_data(&wpa_s->sme.sae);
1142 #endif /* CONFIG_SAE */
1143 #ifdef CONFIG_IEEE80211R
1144         if (wpa_s->sme.ft_ies)
1145                 sme_update_ft_ies(wpa_s, NULL, NULL, 0);
1146 #endif /* CONFIG_IEEE80211R */
1147 }
1148
1149
1150 void sme_deinit(struct wpa_supplicant *wpa_s)
1151 {
1152         os_free(wpa_s->sme.ft_ies);
1153         wpa_s->sme.ft_ies = NULL;
1154         wpa_s->sme.ft_ies_len = 0;
1155 #ifdef CONFIG_IEEE80211W
1156         sme_stop_sa_query(wpa_s);
1157 #endif /* CONFIG_IEEE80211W */
1158         sme_clear_on_disassoc(wpa_s);
1159
1160         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1161         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1162         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1163 }
1164
1165
1166 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
1167                                    const u8 *chan_list, u8 num_channels,
1168                                    u8 num_intol)
1169 {
1170         struct ieee80211_2040_bss_coex_ie *bc_ie;
1171         struct ieee80211_2040_intol_chan_report *ic_report;
1172         struct wpabuf *buf;
1173
1174         wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR
1175                    " (num_channels=%u num_intol=%u)",
1176                    MAC2STR(wpa_s->bssid), num_channels, num_intol);
1177         wpa_hexdump(MSG_DEBUG, "SME: 20/40 BSS Intolerant Channels",
1178                     chan_list, num_channels);
1179
1180         buf = wpabuf_alloc(2 + /* action.category + action_code */
1181                            sizeof(struct ieee80211_2040_bss_coex_ie) +
1182                            sizeof(struct ieee80211_2040_intol_chan_report) +
1183                            num_channels);
1184         if (buf == NULL)
1185                 return;
1186
1187         wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
1188         wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
1189
1190         bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
1191         bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
1192         bc_ie->length = 1;
1193         if (num_intol)
1194                 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
1195
1196         if (num_channels > 0) {
1197                 ic_report = wpabuf_put(buf, sizeof(*ic_report));
1198                 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
1199                 ic_report->length = num_channels + 1;
1200                 ic_report->op_class = 0;
1201                 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
1202                           num_channels);
1203         }
1204
1205         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1206                                 wpa_s->own_addr, wpa_s->bssid,
1207                                 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
1208                 wpa_msg(wpa_s, MSG_INFO,
1209                         "SME: Failed to send 20/40 BSS Coexistence frame");
1210         }
1211
1212         wpabuf_free(buf);
1213 }
1214
1215
1216 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
1217 {
1218         struct wpa_bss *bss;
1219         const u8 *ie;
1220         u16 ht_cap;
1221         u8 chan_list[P2P_MAX_CHANNELS], channel;
1222         u8 num_channels = 0, num_intol = 0, i;
1223
1224         if (!wpa_s->sme.sched_obss_scan)
1225                 return 0;
1226
1227         wpa_s->sme.sched_obss_scan = 0;
1228         if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
1229                 return 1;
1230
1231         /*
1232          * Check whether AP uses regulatory triplet or channel triplet in
1233          * country info. Right now the operating class of the BSS channel
1234          * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
1235          * based on the assumption that operating class triplet is not used in
1236          * beacon frame. If the First Channel Number/Operating Extension
1237          * Identifier octet has a positive integer value of 201 or greater,
1238          * then its operating class triplet.
1239          *
1240          * TODO: If Supported Operating Classes element is present in beacon
1241          * frame, have to lookup operating class in Annex E and fill them in
1242          * 2040 coex frame.
1243          */
1244         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
1245         if (ie && (ie[1] >= 6) && (ie[5] >= 201))
1246                 return 1;
1247
1248         os_memset(chan_list, 0, sizeof(chan_list));
1249
1250         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1251                 /* Skip other band bss */
1252                 enum hostapd_hw_mode mode;
1253                 mode = ieee80211_freq_to_chan(bss->freq, &channel);
1254                 if (mode != HOSTAPD_MODE_IEEE80211G &&
1255                     mode != HOSTAPD_MODE_IEEE80211B)
1256                         continue;
1257
1258                 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
1259                 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
1260                 wpa_printf(MSG_DEBUG, "SME OBSS scan BSS " MACSTR
1261                            " freq=%u chan=%u ht_cap=0x%x",
1262                            MAC2STR(bss->bssid), bss->freq, channel, ht_cap);
1263
1264                 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
1265                         if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
1266                                 num_intol++;
1267
1268                         /* Check whether the channel is already considered */
1269                         for (i = 0; i < num_channels; i++) {
1270                                 if (channel == chan_list[i])
1271                                         break;
1272                         }
1273                         if (i != num_channels)
1274                                 continue;
1275
1276                         chan_list[num_channels++] = channel;
1277                 }
1278         }
1279
1280         sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
1281         return 1;
1282 }
1283
1284
1285 static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
1286                                           u16 num_modes,
1287                                           enum hostapd_hw_mode mode)
1288 {
1289         u16 i;
1290
1291         for (i = 0; i < num_modes; i++) {
1292                 if (modes[i].mode == mode)
1293                         return &modes[i];
1294         }
1295
1296         return NULL;
1297 }
1298
1299
1300 static void wpa_obss_scan_freqs_list(struct wpa_supplicant *wpa_s,
1301                                      struct wpa_driver_scan_params *params)
1302 {
1303         /* Include only affected channels */
1304         struct hostapd_hw_modes *mode;
1305         int count, i;
1306         int start, end;
1307
1308         mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes,
1309                         HOSTAPD_MODE_IEEE80211G);
1310         if (mode == NULL) {
1311                 /* No channels supported in this band - use empty list */
1312                 params->freqs = os_zalloc(sizeof(int));
1313                 return;
1314         }
1315
1316         if (wpa_s->sme.ht_sec_chan == HT_SEC_CHAN_UNKNOWN &&
1317             wpa_s->current_bss) {
1318                 const u8 *ie;
1319
1320                 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_OPERATION);
1321                 if (ie && ie[1] >= 2) {
1322                         u8 o;
1323
1324                         o = ie[3] & HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK;
1325                         if (o == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
1326                                 wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_ABOVE;
1327                         else if (o == HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
1328                                 wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_BELOW;
1329                 }
1330         }
1331
1332         start = wpa_s->assoc_freq - 10;
1333         end = wpa_s->assoc_freq + 10;
1334         switch (wpa_s->sme.ht_sec_chan) {
1335         case HT_SEC_CHAN_UNKNOWN:
1336                 /* HT40+ possible on channels 1..9 */
1337                 if (wpa_s->assoc_freq <= 2452)
1338                         start -= 20;
1339                 /* HT40- possible on channels 5-13 */
1340                 if (wpa_s->assoc_freq >= 2432)
1341                         end += 20;
1342                 break;
1343         case HT_SEC_CHAN_ABOVE:
1344                 end += 20;
1345                 break;
1346         case HT_SEC_CHAN_BELOW:
1347                 start -= 20;
1348                 break;
1349         }
1350         wpa_printf(MSG_DEBUG,
1351                    "OBSS: assoc_freq %d possible affected range %d-%d",
1352                    wpa_s->assoc_freq, start, end);
1353
1354         params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
1355         if (params->freqs == NULL)
1356                 return;
1357         for (count = 0, i = 0; i < mode->num_channels; i++) {
1358                 int freq;
1359
1360                 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
1361                         continue;
1362                 freq = mode->channels[i].freq;
1363                 if (freq - 10 >= end || freq + 10 <= start)
1364                         continue; /* not affected */
1365                 params->freqs[count++] = freq;
1366         }
1367 }
1368
1369
1370 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1371 {
1372         struct wpa_supplicant *wpa_s = eloop_ctx;
1373         struct wpa_driver_scan_params params;
1374
1375         if (!wpa_s->current_bss) {
1376                 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
1377                 return;
1378         }
1379
1380         os_memset(&params, 0, sizeof(params));
1381         wpa_obss_scan_freqs_list(wpa_s, &params);
1382         params.low_priority = 1;
1383         wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
1384
1385         if (wpa_supplicant_trigger_scan(wpa_s, &params))
1386                 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
1387         else
1388                 wpa_s->sme.sched_obss_scan = 1;
1389         os_free(params.freqs);
1390
1391         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1392                                sme_obss_scan_timeout, wpa_s, NULL);
1393 }
1394
1395
1396 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
1397 {
1398         const u8 *ie;
1399         struct wpa_bss *bss = wpa_s->current_bss;
1400         struct wpa_ssid *ssid = wpa_s->current_ssid;
1401         struct hostapd_hw_modes *hw_mode = NULL;
1402         int i;
1403
1404         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1405         wpa_s->sme.sched_obss_scan = 0;
1406         wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_UNKNOWN;
1407         if (!enable)
1408                 return;
1409
1410         /*
1411          * Schedule OBSS scan if driver is using station SME in wpa_supplicant
1412          * or it expects OBSS scan to be performed by wpa_supplicant.
1413          */
1414         if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
1415               (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
1416             ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
1417                 return;
1418
1419         if (!wpa_s->hw.modes)
1420                 return;
1421
1422         /* only HT caps in 11g mode are relevant */
1423         for (i = 0; i < wpa_s->hw.num_modes; i++) {
1424                 hw_mode = &wpa_s->hw.modes[i];
1425                 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
1426                         break;
1427         }
1428
1429         /* Driver does not support HT40 for 11g or doesn't have 11g. */
1430         if (i == wpa_s->hw.num_modes || !hw_mode ||
1431             !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1432                 return;
1433
1434         if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
1435                 return; /* Not associated on 2.4 GHz band */
1436
1437         /* Check whether AP supports HT40 */
1438         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
1439         if (!ie || ie[1] < 2 ||
1440             !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1441                 return; /* AP does not support HT40 */
1442
1443         ie = wpa_bss_get_ie(wpa_s->current_bss,
1444                             WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
1445         if (!ie || ie[1] < 14)
1446                 return; /* AP does not request OBSS scans */
1447
1448         wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
1449         if (wpa_s->sme.obss_scan_int < 10) {
1450                 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
1451                            "replaced with the minimum 10 sec",
1452                            wpa_s->sme.obss_scan_int);
1453                 wpa_s->sme.obss_scan_int = 10;
1454         }
1455         wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
1456                    wpa_s->sme.obss_scan_int);
1457         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1458                                sme_obss_scan_timeout, wpa_s, NULL);
1459 }
1460
1461
1462 #ifdef CONFIG_IEEE80211W
1463
1464 static const unsigned int sa_query_max_timeout = 1000;
1465 static const unsigned int sa_query_retry_timeout = 201;
1466
1467 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
1468 {
1469         u32 tu;
1470         struct os_reltime now, passed;
1471         os_get_reltime(&now);
1472         os_reltime_sub(&now, &wpa_s->sme.sa_query_start, &passed);
1473         tu = (passed.sec * 1000000 + passed.usec) / 1024;
1474         if (sa_query_max_timeout < tu) {
1475                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
1476                 sme_stop_sa_query(wpa_s);
1477                 wpa_supplicant_deauthenticate(
1478                         wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
1479                 return 1;
1480         }
1481
1482         return 0;
1483 }
1484
1485
1486 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
1487                                   const u8 *trans_id)
1488 {
1489         u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
1490         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
1491                 MACSTR, MAC2STR(wpa_s->bssid));
1492         wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
1493                     trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1494         req[0] = WLAN_ACTION_SA_QUERY;
1495         req[1] = WLAN_SA_QUERY_REQUEST;
1496         os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1497         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1498                                 wpa_s->own_addr, wpa_s->bssid,
1499                                 req, sizeof(req), 0) < 0)
1500                 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
1501                         "Request");
1502 }
1503
1504
1505 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
1506 {
1507         struct wpa_supplicant *wpa_s = eloop_ctx;
1508         unsigned int timeout, sec, usec;
1509         u8 *trans_id, *nbuf;
1510
1511         if (wpa_s->sme.sa_query_count > 0 &&
1512             sme_check_sa_query_timeout(wpa_s))
1513                 return;
1514
1515         nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
1516                                 wpa_s->sme.sa_query_count + 1,
1517                                 WLAN_SA_QUERY_TR_ID_LEN);
1518         if (nbuf == NULL)
1519                 return;
1520         if (wpa_s->sme.sa_query_count == 0) {
1521                 /* Starting a new SA Query procedure */
1522                 os_get_reltime(&wpa_s->sme.sa_query_start);
1523         }
1524         trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
1525         wpa_s->sme.sa_query_trans_id = nbuf;
1526         wpa_s->sme.sa_query_count++;
1527
1528         if (os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN) < 0) {
1529                 wpa_printf(MSG_DEBUG, "Could not generate SA Query ID");
1530                 return;
1531         }
1532
1533         timeout = sa_query_retry_timeout;
1534         sec = ((timeout / 1000) * 1024) / 1000;
1535         usec = (timeout % 1000) * 1024;
1536         eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
1537
1538         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
1539                 wpa_s->sme.sa_query_count);
1540
1541         sme_send_sa_query_req(wpa_s, trans_id);
1542 }
1543
1544
1545 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
1546 {
1547         sme_sa_query_timer(wpa_s, NULL);
1548 }
1549
1550
1551 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
1552 {
1553         eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
1554         os_free(wpa_s->sme.sa_query_trans_id);
1555         wpa_s->sme.sa_query_trans_id = NULL;
1556         wpa_s->sme.sa_query_count = 0;
1557 }
1558
1559
1560 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1561                                  const u8 *da, u16 reason_code)
1562 {
1563         struct wpa_ssid *ssid;
1564         struct os_reltime now;
1565
1566         if (wpa_s->wpa_state != WPA_COMPLETED)
1567                 return;
1568         ssid = wpa_s->current_ssid;
1569         if (wpas_get_ssid_pmf(wpa_s, ssid) == NO_MGMT_FRAME_PROTECTION)
1570                 return;
1571         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1572                 return;
1573         if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1574             reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1575                 return;
1576         if (wpa_s->sme.sa_query_count > 0)
1577                 return;
1578
1579         os_get_reltime(&now);
1580         if (wpa_s->sme.last_unprot_disconnect.sec &&
1581             !os_reltime_expired(&now, &wpa_s->sme.last_unprot_disconnect, 10))
1582                 return; /* limit SA Query procedure frequency */
1583         wpa_s->sme.last_unprot_disconnect = now;
1584
1585         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1586                 "possible AP/STA state mismatch - trigger SA Query");
1587         sme_start_sa_query(wpa_s);
1588 }
1589
1590
1591 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1592                      const u8 *data, size_t len)
1593 {
1594         int i;
1595
1596         if (wpa_s->sme.sa_query_trans_id == NULL ||
1597             len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1598             data[0] != WLAN_SA_QUERY_RESPONSE)
1599                 return;
1600         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1601                 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1602
1603         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1604                 return;
1605
1606         for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1607                 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1608                               i * WLAN_SA_QUERY_TR_ID_LEN,
1609                               data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1610                         break;
1611         }
1612
1613         if (i >= wpa_s->sme.sa_query_count) {
1614                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1615                         "transaction identifier found");
1616                 return;
1617         }
1618
1619         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1620                 "from " MACSTR, MAC2STR(sa));
1621         sme_stop_sa_query(wpa_s);
1622 }
1623
1624 #endif /* CONFIG_IEEE80211W */