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