wpa_supplicant/sme.c

   1 /*
   2  * wpa_supplicant - SME
   3  * Copyright (c) 2009-2012, 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 struct wpabuf * sme_auth_build_sae_commit(struct wpa_supplicant *wpa_s,
  46                                                  struct wpa_ssid *ssid,
  47                                                  const u8 *bssid)
  48 {
  49         struct wpabuf *buf;
  50
  51         if (ssid->passphrase == NULL) {
  52                 wpa_printf(MSG_DEBUG, "SAE: No password available");
  53                 return NULL;
  54         }
  55
  56         if (sae_prepare_commit(wpa_s->own_addr, bssid,
  57                                (u8 *) ssid->passphrase,
  58                                os_strlen(ssid->passphrase),
  59                                &wpa_s->sme.sae) < 0) {
  60                 wpa_printf(MSG_DEBUG, "SAE: Could not pick PWE");
  61                 return NULL;
  62         }
  63
  64         buf = wpabuf_alloc(4 + SAE_COMMIT_MAX_LEN);
  65         if (buf == NULL)
  66                 return NULL;
  67
  68         wpabuf_put_le16(buf, 1); /* Transaction seq# */
  69         wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
  70         sae_write_commit(&wpa_s->sme.sae, buf);
  71
  72         return buf;
  73 }
  74
  75
  76 static struct wpabuf * sme_auth_build_sae_confirm(struct wpa_supplicant *wpa_s)
  77 {
  78         struct wpabuf *buf;
  79
  80         buf = wpabuf_alloc(4 + SAE_CONFIRM_MAX_LEN);
  81         if (buf == NULL)
  82                 return NULL;
  83
  84         wpabuf_put_le16(buf, 2); /* Transaction seq# */
  85         wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
  86         sae_write_confirm(&wpa_s->sme.sae, buf);
  87
  88         return buf;
  89 }
  90
  91 #endif /* CONFIG_SAE */
  92
  93
  94 static void sme_send_authentication(struct wpa_supplicant *wpa_s,
  95                                     struct wpa_bss *bss, struct wpa_ssid *ssid,
  96                                     int start)
  97 {
  98         struct wpa_driver_auth_params params;
  99         struct wpa_ssid *old_ssid;
 100 #ifdef CONFIG_IEEE80211R
 101         const u8 *ie;
 102 #endif /* CONFIG_IEEE80211R */
 103 #ifdef CONFIG_IEEE80211R
 104         const u8 *md = NULL;
 105 #endif /* CONFIG_IEEE80211R */
 106         int i, bssid_changed;
 107         struct wpabuf *resp = NULL;
 108         u8 ext_capab[10];
 109         int ext_capab_len;
 110
 111         if (bss == NULL) {
 112                 wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for "
 113                         "the network");
 114                 return;
 115         }
 116
 117         wpa_s->current_bss = bss;
 118
 119         os_memset(&params, 0, sizeof(params));
 120         wpa_s->reassociate = 0;
 121
 122         params.freq = bss->freq;
 123         params.bssid = bss->bssid;
 124         params.ssid = bss->ssid;
 125         params.ssid_len = bss->ssid_len;
 126         params.p2p = ssid->p2p_group;
 127
 128         if (wpa_s->sme.ssid_len != params.ssid_len ||
 129             os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
 130                 wpa_s->sme.prev_bssid_set = 0;
 131
 132         wpa_s->sme.freq = params.freq;
 133         os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
 134         wpa_s->sme.ssid_len = params.ssid_len;
 135
 136         params.auth_alg = WPA_AUTH_ALG_OPEN;
 137 #ifdef IEEE8021X_EAPOL
 138         if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
 139                 if (ssid->leap) {
 140                         if (ssid->non_leap == 0)
 141                                 params.auth_alg = WPA_AUTH_ALG_LEAP;
 142                         else
 143                                 params.auth_alg |= WPA_AUTH_ALG_LEAP;
 144                 }
 145         }
 146 #endif /* IEEE8021X_EAPOL */
 147         wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
 148                 params.auth_alg);
 149         if (ssid->auth_alg) {
 150                 params.auth_alg = ssid->auth_alg;
 151                 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
 152                         "0x%x", params.auth_alg);
 153         }
 154 #ifdef CONFIG_SAE
 155         if (wpa_key_mgmt_sae(ssid->key_mgmt)) {
 156                 const u8 *rsn;
 157                 struct wpa_ie_data ied;
 158
 159                 rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 160                 if (rsn &&
 161                     wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0) {
 162                         if (wpa_key_mgmt_sae(ied.key_mgmt)) {
 163                                 wpa_dbg(wpa_s, MSG_DEBUG, "Using SAE auth_alg");
 164                                 params.auth_alg = WPA_AUTH_ALG_SAE;
 165                         }
 166                 }
 167         }
 168 #endif /* CONFIG_SAE */
 169
 170         for (i = 0; i < NUM_WEP_KEYS; i++) {
 171                 if (ssid->wep_key_len[i])
 172                         params.wep_key[i] = ssid->wep_key[i];
 173                 params.wep_key_len[i] = ssid->wep_key_len[i];
 174         }
 175         params.wep_tx_keyidx = ssid->wep_tx_keyidx;
 176
 177         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 178         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 179         os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
 180         if (bssid_changed)
 181                 wpas_notify_bssid_changed(wpa_s);
 182
 183         if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
 184              wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
 185             wpa_key_mgmt_wpa(ssid->key_mgmt)) {
 186                 int try_opportunistic;
 187                 try_opportunistic = (ssid->proactive_key_caching < 0 ?
 188                                      wpa_s->conf->okc :
 189                                      ssid->proactive_key_caching) &&
 190                         (ssid->proto & WPA_PROTO_RSN);
 191                 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
 192                                             wpa_s->current_ssid,
 193                                             try_opportunistic) == 0)
 194                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
 195                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 196                 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
 197                                               wpa_s->sme.assoc_req_ie,
 198                                               &wpa_s->sme.assoc_req_ie_len)) {
 199                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 200                                 "key management and encryption suites");
 201                         return;
 202                 }
 203         } else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
 204                    wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) {
 205                 /*
 206                  * Both WPA and non-WPA IEEE 802.1X enabled in configuration -
 207                  * use non-WPA since the scan results did not indicate that the
 208                  * AP is using WPA or WPA2.
 209                  */
 210                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 211                 wpa_s->sme.assoc_req_ie_len = 0;
 212         } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
 213                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 214                 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
 215                                               wpa_s->sme.assoc_req_ie,
 216                                               &wpa_s->sme.assoc_req_ie_len)) {
 217                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 218                                 "key management and encryption suites (no "
 219                                 "scan results)");
 220                         return;
 221                 }
 222 #ifdef CONFIG_WPS
 223         } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 224                 struct wpabuf *wps_ie;
 225                 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
 226                 if (wps_ie && wpabuf_len(wps_ie) <=
 227                     sizeof(wpa_s->sme.assoc_req_ie)) {
 228                         wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
 229                         os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
 230                                   wpa_s->sme.assoc_req_ie_len);
 231                 } else
 232                         wpa_s->sme.assoc_req_ie_len = 0;
 233                 wpabuf_free(wps_ie);
 234                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 235 #endif /* CONFIG_WPS */
 236         } else {
 237                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 238                 wpa_s->sme.assoc_req_ie_len = 0;
 239         }
 240
 241 #ifdef CONFIG_IEEE80211R
 242         ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
 243         if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
 244                 md = ie + 2;
 245         wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
 246         if (md) {
 247                 /* Prepare for the next transition */
 248                 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
 249         }
 250
 251         if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) {
 252                 if (wpa_s->sme.assoc_req_ie_len + 5 <
 253                     sizeof(wpa_s->sme.assoc_req_ie)) {
 254                         struct rsn_mdie *mdie;
 255                         u8 *pos = wpa_s->sme.assoc_req_ie +
 256                                 wpa_s->sme.assoc_req_ie_len;
 257                         *pos++ = WLAN_EID_MOBILITY_DOMAIN;
 258                         *pos++ = sizeof(*mdie);
 259                         mdie = (struct rsn_mdie *) pos;
 260                         os_memcpy(mdie->mobility_domain, md,
 261                                   MOBILITY_DOMAIN_ID_LEN);
 262                         mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
 263                         wpa_s->sme.assoc_req_ie_len += 5;
 264                 }
 265
 266                 if (wpa_s->sme.ft_used &&
 267                     os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
 268                     wpa_sm_has_ptk(wpa_s->wpa)) {
 269                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT "
 270                                 "over-the-air");
 271                         params.auth_alg = WPA_AUTH_ALG_FT;
 272                         params.ie = wpa_s->sme.ft_ies;
 273                         params.ie_len = wpa_s->sme.ft_ies_len;
 274                 }
 275         }
 276 #endif /* CONFIG_IEEE80211R */
 277
 278 #ifdef CONFIG_IEEE80211W
 279         wpa_s->sme.mfp = ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
 280                 wpa_s->conf->pmf : ssid->ieee80211w;
 281         if (wpa_s->sme.mfp != NO_MGMT_FRAME_PROTECTION) {
 282                 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 283                 struct wpa_ie_data _ie;
 284                 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
 285                     _ie.capabilities &
 286                     (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
 287                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
 288                                 "MFP: require MFP");
 289                         wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
 290                 }
 291         }
 292 #endif /* CONFIG_IEEE80211W */
 293
 294 #ifdef CONFIG_P2P
 295         if (wpa_s->global->p2p) {
 296                 u8 *pos;
 297                 size_t len;
 298                 int res;
 299                 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
 300                 len = sizeof(wpa_s->sme.assoc_req_ie) -
 301                         wpa_s->sme.assoc_req_ie_len;
 302                 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
 303                                             ssid->p2p_group);
 304                 if (res >= 0)
 305                         wpa_s->sme.assoc_req_ie_len += res;
 306         }
 307 #endif /* CONFIG_P2P */
 308
 309 #ifdef CONFIG_HS20
 310         if (wpa_s->conf->hs20) {
 311                 struct wpabuf *hs20;
 312                 hs20 = wpabuf_alloc(20);
 313                 if (hs20) {
 314                         wpas_hs20_add_indication(hs20);
 315                         os_memcpy(wpa_s->sme.assoc_req_ie +
 316                                   wpa_s->sme.assoc_req_ie_len,
 317                                   wpabuf_head(hs20), wpabuf_len(hs20));
 318                         wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
 319                         wpabuf_free(hs20);
 320                 }
 321         }
 322 #endif /* CONFIG_HS20 */
 323
 324         ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab);
 325         if (ext_capab_len > 0) {
 326                 u8 *pos = wpa_s->sme.assoc_req_ie;
 327                 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
 328                         pos += 2 + pos[1];
 329                 os_memmove(pos + ext_capab_len, pos,
 330                            wpa_s->sme.assoc_req_ie_len -
 331                            (pos - wpa_s->sme.assoc_req_ie));
 332                 wpa_s->sme.assoc_req_ie_len += ext_capab_len;
 333                 os_memcpy(pos, ext_capab, ext_capab_len);
 334         }
 335
 336 #ifdef CONFIG_SAE
 337         if (params.auth_alg == WPA_AUTH_ALG_SAE) {
 338                 if (start)
 339                         resp = sme_auth_build_sae_commit(wpa_s, ssid,
 340                                                          bss->bssid);
 341                 else
 342                         resp = sme_auth_build_sae_confirm(wpa_s);
 343                 if (resp == NULL)
 344                         return;
 345                 params.sae_data = wpabuf_head(resp);
 346                 params.sae_data_len = wpabuf_len(resp);
 347                 wpa_s->sme.sae.state = start ? SAE_COMMIT : SAE_CONFIRM;
 348         }
 349 #endif /* CONFIG_SAE */
 350
 351         wpa_supplicant_cancel_sched_scan(wpa_s);
 352         wpa_supplicant_cancel_scan(wpa_s);
 353
 354         wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
 355                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 356                 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
 357
 358         wpa_clear_keys(wpa_s, bss->bssid);
 359         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 360         old_ssid = wpa_s->current_ssid;
 361         wpa_s->current_ssid = ssid;
 362         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
 363         wpa_supplicant_initiate_eapol(wpa_s);
 364         if (old_ssid != wpa_s->current_ssid)
 365                 wpas_notify_network_changed(wpa_s);
 366
 367         wpa_s->sme.auth_alg = params.auth_alg;
 368         if (wpa_drv_authenticate(wpa_s, &params) < 0) {
 369                 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
 370                         "driver failed");
 371                 wpas_connection_failed(wpa_s, bss->bssid);
 372                 wpa_supplicant_mark_disassoc(wpa_s);
 373                 wpabuf_free(resp);
 374                 return;
 375         }
 376
 377         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 378                                NULL);
 379
 380         /*
 381          * Association will be started based on the authentication event from
 382          * the driver.
 383          */
 384
 385         wpabuf_free(resp);
 386 }
 387
 388
 389 void sme_authenticate(struct wpa_supplicant *wpa_s,
 390                       struct wpa_bss *bss, struct wpa_ssid *ssid)
 391 {
 392 #ifdef CONFIG_SAE
 393         wpa_s->sme.sae.state = SAE_INIT;
 394         wpa_s->sme.sae.send_confirm = 0;
 395 #endif /* CONFIG_SAE */
 396         sme_send_authentication(wpa_s, bss, ssid, 1);
 397 }
 398
 399
 400 #ifdef CONFIG_SAE
 401
 402 static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
 403                         u16 status_code, const u8 *data, size_t len)
 404 {
 405         wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
 406                 "status code %u", auth_transaction, status_code);
 407         wpa_hexdump(MSG_DEBUG, "SME: SAE fields", data, len);
 408
 409         if (status_code != WLAN_STATUS_SUCCESS)
 410                 return -1;
 411
 412         if (auth_transaction == 1) {
 413                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
 414                 if (wpa_s->current_bss == NULL ||
 415                     wpa_s->current_ssid == NULL)
 416                         return -1;
 417                 if (wpa_s->sme.sae.state != SAE_COMMIT)
 418                         return -1;
 419                 if (sae_parse_commit(&wpa_s->sme.sae, data, len) !=
 420                     WLAN_STATUS_SUCCESS)
 421                         return -1;
 422
 423                 if (sae_process_commit(&wpa_s->sme.sae) < 0) {
 424                         wpa_printf(MSG_DEBUG, "SAE: Failed to process peer "
 425                                    "commit");
 426                         return -1;
 427                 }
 428
 429                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 430                                         wpa_s->current_ssid, 0);
 431                 return 0;
 432         } else if (auth_transaction == 2) {
 433                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
 434                 if (wpa_s->sme.sae.state != SAE_CONFIRM)
 435                         return -1;
 436                 if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0)
 437                         return -1;
 438                 return 1;
 439         }
 440
 441         return -1;
 442 }
 443 #endif /* CONFIG_SAE */
 444
 445
 446 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
 447 {
 448         struct wpa_ssid *ssid = wpa_s->current_ssid;
 449
 450         if (ssid == NULL) {
 451                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 452                         "when network is not selected");
 453                 return;
 454         }
 455
 456         if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
 457                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 458                         "when not in authenticating state");
 459                 return;
 460         }
 461
 462         if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
 463                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
 464                         "unexpected peer " MACSTR,
 465                         MAC2STR(data->auth.peer));
 466                 return;
 467         }
 468
 469         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
 470                 " auth_type=%d auth_transaction=%d status_code=%d",
 471                 MAC2STR(data->auth.peer), data->auth.auth_type,
 472                 data->auth.auth_transaction, data->auth.status_code);
 473         wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
 474                     data->auth.ies, data->auth.ies_len);
 475
 476         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 477
 478 #ifdef CONFIG_SAE
 479         if (data->auth.auth_type == WLAN_AUTH_SAE) {
 480                 int res;
 481                 res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
 482                                    data->auth.status_code, data->auth.ies,
 483                                    data->auth.ies_len);
 484                 if (res < 0) {
 485                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 486                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 487
 488                 }
 489                 if (res != 1)
 490                         return;
 491
 492                 wpa_printf(MSG_DEBUG, "SME: SAE completed - setting PMK for "
 493                            "4-way handshake");
 494                 wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN);
 495         }
 496 #endif /* CONFIG_SAE */
 497
 498         if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
 499                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
 500                         "code %d)", data->auth.status_code);
 501
 502                 if (data->auth.status_code !=
 503                     WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
 504                     wpa_s->sme.auth_alg == data->auth.auth_type ||
 505                     wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
 506                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 507                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 508                         return;
 509                 }
 510
 511                 switch (data->auth.auth_type) {
 512                 case WLAN_AUTH_OPEN:
 513                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 514
 515                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
 516                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 517                                                  wpa_s->current_ssid);
 518                         return;
 519
 520                 case WLAN_AUTH_SHARED_KEY:
 521                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
 522
 523                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
 524                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 525                                                  wpa_s->current_ssid);
 526                         return;
 527
 528                 default:
 529                         return;
 530                 }
 531         }
 532
 533 #ifdef CONFIG_IEEE80211R
 534         if (data->auth.auth_type == WLAN_AUTH_FT) {
 535                 union wpa_event_data edata;
 536                 os_memset(&edata, 0, sizeof(edata));
 537                 edata.ft_ies.ies = data->auth.ies;
 538                 edata.ft_ies.ies_len = data->auth.ies_len;
 539                 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
 540                 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
 541         }
 542 #endif /* CONFIG_IEEE80211R */
 543
 544         sme_associate(wpa_s, ssid->mode, data->auth.peer,
 545                       data->auth.auth_type);
 546 }
 547
 548
 549 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
 550                    const u8 *bssid, u16 auth_type)
 551 {
 552         struct wpa_driver_associate_params params;
 553         struct ieee802_11_elems elems;
 554 #ifdef CONFIG_HT_OVERRIDES
 555         struct ieee80211_ht_capabilities htcaps;
 556         struct ieee80211_ht_capabilities htcaps_mask;
 557 #endif /* CONFIG_HT_OVERRIDES */
 558
 559         os_memset(&params, 0, sizeof(params));
 560         params.bssid = bssid;
 561         params.ssid = wpa_s->sme.ssid;
 562         params.ssid_len = wpa_s->sme.ssid_len;
 563         params.freq = wpa_s->sme.freq;
 564         params.bg_scan_period = wpa_s->current_ssid ?
 565                 wpa_s->current_ssid->bg_scan_period : -1;
 566         params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
 567                 wpa_s->sme.assoc_req_ie : NULL;
 568         params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
 569         params.pairwise_suite = cipher_suite2driver(wpa_s->pairwise_cipher);
 570         params.group_suite = cipher_suite2driver(wpa_s->group_cipher);
 571 #ifdef CONFIG_HT_OVERRIDES
 572         os_memset(&htcaps, 0, sizeof(htcaps));
 573         os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
 574         params.htcaps = (u8 *) &htcaps;
 575         params.htcaps_mask = (u8 *) &htcaps_mask;
 576         wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, &params);
 577 #endif /* CONFIG_HT_OVERRIDES */
 578 #ifdef CONFIG_IEEE80211R
 579         if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
 580                 params.wpa_ie = wpa_s->sme.ft_ies;
 581                 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
 582         }
 583 #endif /* CONFIG_IEEE80211R */
 584         params.mode = mode;
 585         params.mgmt_frame_protection = wpa_s->sme.mfp;
 586         if (wpa_s->sme.prev_bssid_set)
 587                 params.prev_bssid = wpa_s->sme.prev_bssid;
 588
 589         wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
 590                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 591                 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
 592                 params.freq);
 593
 594         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
 595
 596         if (params.wpa_ie == NULL ||
 597             ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
 598             < 0) {
 599                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
 600                 os_memset(&elems, 0, sizeof(elems));
 601         }
 602         if (elems.rsn_ie) {
 603                 params.wpa_proto = WPA_PROTO_RSN;
 604                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
 605                                         elems.rsn_ie_len + 2);
 606         } else if (elems.wpa_ie) {
 607                 params.wpa_proto = WPA_PROTO_WPA;
 608                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
 609                                         elems.wpa_ie_len + 2);
 610         } else
 611                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 612         if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
 613                 params.p2p = 1;
 614
 615         if (wpa_s->parent->set_sta_uapsd)
 616                 params.uapsd = wpa_s->parent->sta_uapsd;
 617         else
 618                 params.uapsd = -1;
 619
 620         if (wpa_drv_associate(wpa_s, &params) < 0) {
 621                 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
 622                         "driver failed");
 623                 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 624                 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 625                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 626                 return;
 627         }
 628
 629         eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
 630                                NULL);
 631 }
 632
 633
 634 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
 635                       const u8 *ies, size_t ies_len)
 636 {
 637         if (md == NULL || ies == NULL) {
 638                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
 639                 os_free(wpa_s->sme.ft_ies);
 640                 wpa_s->sme.ft_ies = NULL;
 641                 wpa_s->sme.ft_ies_len = 0;
 642                 wpa_s->sme.ft_used = 0;
 643                 return 0;
 644         }
 645
 646         os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
 647         wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
 648         os_free(wpa_s->sme.ft_ies);
 649         wpa_s->sme.ft_ies = os_malloc(ies_len);
 650         if (wpa_s->sme.ft_ies == NULL)
 651                 return -1;
 652         os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
 653         wpa_s->sme.ft_ies_len = ies_len;
 654         return 0;
 655 }
 656
 657
 658 static void sme_deauth(struct wpa_supplicant *wpa_s)
 659 {
 660         int bssid_changed;
 661
 662         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 663
 664         if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
 665                                    WLAN_REASON_DEAUTH_LEAVING) < 0) {
 666                 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
 667                         "failed");
 668         }
 669         wpa_s->sme.prev_bssid_set = 0;
 670
 671         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 672         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 673         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 674         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 675         if (bssid_changed)
 676                 wpas_notify_bssid_changed(wpa_s);
 677 }
 678
 679
 680 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
 681                             union wpa_event_data *data)
 682 {
 683         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
 684                 "status code %d", MAC2STR(wpa_s->pending_bssid),
 685                 data->assoc_reject.status_code);
 686
 687         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 688
 689         /*
 690          * For now, unconditionally terminate the previous authentication. In
 691          * theory, this should not be needed, but mac80211 gets quite confused
 692          * if the authentication is left pending.. Some roaming cases might
 693          * benefit from using the previous authentication, so this could be
 694          * optimized in the future.
 695          */
 696         sme_deauth(wpa_s);
 697 }
 698
 699
 700 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
 701                               union wpa_event_data *data)
 702 {
 703         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
 704         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 705         wpa_supplicant_mark_disassoc(wpa_s);
 706 }
 707
 708
 709 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
 710                                union wpa_event_data *data)
 711 {
 712         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
 713         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 714         wpa_supplicant_mark_disassoc(wpa_s);
 715 }
 716
 717
 718 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
 719                         union wpa_event_data *data)
 720 {
 721         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
 722         if (wpa_s->sme.prev_bssid_set) {
 723                 /*
 724                  * cfg80211/mac80211 can get into somewhat confused state if
 725                  * the AP only disassociates us and leaves us in authenticated
 726                  * state. For now, force the state to be cleared to avoid
 727                  * confusing errors if we try to associate with the AP again.
 728                  */
 729                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
 730                         "driver state");
 731                 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
 732                                        WLAN_REASON_DEAUTH_LEAVING);
 733         }
 734 }
 735
 736
 737 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
 738 {
 739         struct wpa_supplicant *wpa_s = eloop_ctx;
 740         if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
 741                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
 742                 sme_deauth(wpa_s);
 743         }
 744 }
 745
 746
 747 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
 748 {
 749         struct wpa_supplicant *wpa_s = eloop_ctx;
 750         if (wpa_s->wpa_state == WPA_ASSOCIATING) {
 751                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
 752                 sme_deauth(wpa_s);
 753         }
 754 }
 755
 756
 757 void sme_state_changed(struct wpa_supplicant *wpa_s)
 758 {
 759         /* Make sure timers are cleaned up appropriately. */
 760         if (wpa_s->wpa_state != WPA_ASSOCIATING)
 761                 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 762         if (wpa_s->wpa_state != WPA_AUTHENTICATING)
 763                 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 764 }
 765
 766
 767 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
 768                                        const u8 *prev_pending_bssid)
 769 {
 770         /*
 771          * mac80211-workaround to force deauth on failed auth cmd,
 772          * requires us to remain in authenticating state to allow the
 773          * second authentication attempt to be continued properly.
 774          */
 775         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
 776                 "to proceed after disconnection event");
 777         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 778         os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
 779
 780         /*
 781          * Re-arm authentication timer in case auth fails for whatever reason.
 782          */
 783         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 784         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 785                                NULL);
 786 }
 787
 788
 789 void sme_deinit(struct wpa_supplicant *wpa_s)
 790 {
 791         os_free(wpa_s->sme.ft_ies);
 792         wpa_s->sme.ft_ies = NULL;
 793         wpa_s->sme.ft_ies_len = 0;
 794 #ifdef CONFIG_IEEE80211W
 795         sme_stop_sa_query(wpa_s);
 796 #endif /* CONFIG_IEEE80211W */
 797
 798         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 799         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 800         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
 801 }
 802
 803
 804 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
 805                                    const u8 *chan_list, u8 num_channels,
 806                                    u8 num_intol)
 807 {
 808         struct ieee80211_2040_bss_coex_ie *bc_ie;
 809         struct ieee80211_2040_intol_chan_report *ic_report;
 810         struct wpabuf *buf;
 811
 812         wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR,
 813                    MAC2STR(wpa_s->bssid));
 814
 815         buf = wpabuf_alloc(2 + /* action.category + action_code */
 816                            sizeof(struct ieee80211_2040_bss_coex_ie) +
 817                            sizeof(struct ieee80211_2040_intol_chan_report) +
 818                            num_channels);
 819         if (buf == NULL)
 820                 return;
 821
 822         wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
 823         wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
 824
 825         bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
 826         bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
 827         bc_ie->length = 1;
 828         if (num_intol)
 829                 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
 830
 831         if (num_channels > 0) {
 832                 ic_report = wpabuf_put(buf, sizeof(*ic_report));
 833                 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
 834                 ic_report->length = num_channels + 1;
 835                 ic_report->op_class = 0;
 836                 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
 837                           num_channels);
 838         }
 839
 840         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
 841                                 wpa_s->own_addr, wpa_s->bssid,
 842                                 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
 843                 wpa_msg(wpa_s, MSG_INFO,
 844                         "SME: Failed to send 20/40 BSS Coexistence frame");
 845         }
 846
 847         wpabuf_free(buf);
 848 }
 849
 850
 851 /**
 852  * enum wpas_band - Frequency band
 853  * @WPAS_BAND_2GHZ: 2.4 GHz ISM band
 854  * @WPAS_BAND_5GHZ: around 5 GHz band (4.9 - 5.7 GHz)
 855  */
 856 enum wpas_band {
 857         WPAS_BAND_2GHZ,
 858         WPAS_BAND_5GHZ,
 859         WPAS_BAND_INVALID
 860 };
 861
 862 /**
 863  * freq_to_channel - Convert frequency into channel info
 864  * @channel: Buffer for returning channel number
 865  * Returns: Band (2 or 5 GHz)
 866  */
 867 static enum wpas_band freq_to_channel(int freq, u8 *channel)
 868 {
 869         enum wpas_band band = (freq <= 2484) ? WPAS_BAND_2GHZ : WPAS_BAND_5GHZ;
 870         u8 chan = 0;
 871
 872         if (freq >= 2412 && freq <= 2472)
 873                 chan = (freq - 2407) / 5;
 874         else if (freq == 2484)
 875                 chan = 14;
 876         else if (freq >= 5180 && freq <= 5805)
 877                 chan = (freq - 5000) / 5;
 878
 879         *channel = chan;
 880         return band;
 881 }
 882
 883
 884 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
 885 {
 886         struct wpa_bss *bss;
 887         const u8 *ie;
 888         u16 ht_cap;
 889         u8 chan_list[P2P_MAX_CHANNELS], channel;
 890         u8 num_channels = 0, num_intol = 0, i;
 891
 892         if (!wpa_s->sme.sched_obss_scan)
 893                 return 0;
 894
 895         wpa_s->sme.sched_obss_scan = 0;
 896         if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
 897                 return 1;
 898
 899         /*
 900          * Check whether AP uses regulatory triplet or channel triplet in
 901          * country info. Right now the operating class of the BSS channel
 902          * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
 903          * based on the assumption that operating class triplet is not used in
 904          * beacon frame. If the First Channel Number/Operating Extension
 905          * Identifier octet has a positive integer value of 201 or greater,
 906          * then its operating class triplet.
 907          *
 908          * TODO: If Supported Operating Classes element is present in beacon
 909          * frame, have to lookup operating class in Annex E and fill them in
 910          * 2040 coex frame.
 911          */
 912         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
 913         if (ie && (ie[1] >= 6) && (ie[5] >= 201))
 914                 return 1;
 915
 916         os_memset(chan_list, 0, sizeof(chan_list));
 917
 918         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
 919                 /* Skip other band bss */
 920                 if (freq_to_channel(bss->freq, &channel) != WPAS_BAND_2GHZ)
 921                         continue;
 922
 923                 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
 924                 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
 925
 926                 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
 927                         /* Check whether the channel is already considered */
 928                         for (i = 0; i < num_channels; i++) {
 929                                 if (channel == chan_list[i])
 930                                         break;
 931                         }
 932                         if (i != num_channels)
 933                                 continue;
 934
 935                         if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
 936                                 num_intol++;
 937
 938                         chan_list[num_channels++] = channel;
 939                 }
 940         }
 941
 942         sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
 943         return 1;
 944 }
 945
 946
 947 static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
 948                                           u16 num_modes,
 949                                           enum hostapd_hw_mode mode)
 950 {
 951         u16 i;
 952
 953         for (i = 0; i < num_modes; i++) {
 954                 if (modes[i].mode == mode)
 955                         return &modes[i];
 956         }
 957
 958         return NULL;
 959 }
 960
 961
 962 static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s,
 963                                         enum hostapd_hw_mode band,
 964                                         struct wpa_driver_scan_params *params)
 965 {
 966         /* Include only supported channels for the specified band */
 967         struct hostapd_hw_modes *mode;
 968         int count, i;
 969
 970         mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band);
 971         if (mode == NULL) {
 972                 /* No channels supported in this band - use empty list */
 973                 params->freqs = os_zalloc(sizeof(int));
 974                 return;
 975         }
 976
 977         params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
 978         if (params->freqs == NULL)
 979                 return;
 980         for (count = 0, i = 0; i < mode->num_channels; i++) {
 981                 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
 982                         continue;
 983                 params->freqs[count++] = mode->channels[i].freq;
 984         }
 985 }
 986
 987
 988 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
 989 {
 990         struct wpa_supplicant *wpa_s = eloop_ctx;
 991         struct wpa_driver_scan_params params;
 992
 993         if (!wpa_s->current_bss) {
 994                 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
 995                 return;
 996         }
 997
 998         os_memset(&params, 0, sizeof(params));
 999         wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G, &params);
1000         wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
1001
1002         if (wpa_supplicant_trigger_scan(wpa_s, &params))
1003                 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
1004         else
1005                 wpa_s->sme.sched_obss_scan = 1;
1006         os_free(params.freqs);
1007
1008         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1009                                sme_obss_scan_timeout, wpa_s, NULL);
1010 }
1011
1012
1013 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
1014 {
1015         const u8 *ie;
1016         struct wpa_bss *bss = wpa_s->current_bss;
1017         struct wpa_ssid *ssid = wpa_s->current_ssid;
1018         struct hostapd_hw_modes *hw_mode = NULL;
1019         int i;
1020
1021         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1022         wpa_s->sme.sched_obss_scan = 0;
1023         if (!enable)
1024                 return;
1025
1026         /*
1027          * Schedule OBSS scan if driver is using station SME in wpa_supplicant
1028          * or it expects OBSS scan to be performed by wpa_supplicant.
1029          */
1030         if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
1031               (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
1032             ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
1033                 return;
1034
1035         if (!wpa_s->hw.modes)
1036                 return;
1037
1038         /* only HT caps in 11g mode are relevant */
1039         for (i = 0; i < wpa_s->hw.num_modes; i++) {
1040                 hw_mode = &wpa_s->hw.modes[i];
1041                 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
1042                         break;
1043         }
1044
1045         /* Driver does not support HT40 for 11g or doesn't have 11g. */
1046         if (i == wpa_s->hw.num_modes || !hw_mode ||
1047             !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1048                 return;
1049
1050         if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
1051                 return; /* Not associated on 2.4 GHz band */
1052
1053         /* Check whether AP supports HT40 */
1054         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
1055         if (!ie || ie[1] < 2 ||
1056             !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1057                 return; /* AP does not support HT40 */
1058
1059         ie = wpa_bss_get_ie(wpa_s->current_bss,
1060                             WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
1061         if (!ie || ie[1] < 14)
1062                 return; /* AP does not request OBSS scans */
1063
1064         wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
1065         if (wpa_s->sme.obss_scan_int < 10) {
1066                 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
1067                            "replaced with the minimum 10 sec",
1068                            wpa_s->sme.obss_scan_int);
1069                 wpa_s->sme.obss_scan_int = 10;
1070         }
1071         wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
1072                    wpa_s->sme.obss_scan_int);
1073         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1074                                sme_obss_scan_timeout, wpa_s, NULL);
1075 }
1076
1077
1078 #ifdef CONFIG_IEEE80211W
1079
1080 static const unsigned int sa_query_max_timeout = 1000;
1081 static const unsigned int sa_query_retry_timeout = 201;
1082
1083 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
1084 {
1085         u32 tu;
1086         struct os_time now, passed;
1087         os_get_time(&now);
1088         os_time_sub(&now, &wpa_s->sme.sa_query_start, &passed);
1089         tu = (passed.sec * 1000000 + passed.usec) / 1024;
1090         if (sa_query_max_timeout < tu) {
1091                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
1092                 sme_stop_sa_query(wpa_s);
1093                 wpa_supplicant_deauthenticate(
1094                         wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
1095                 return 1;
1096         }
1097
1098         return 0;
1099 }
1100
1101
1102 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
1103                                   const u8 *trans_id)
1104 {
1105         u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
1106         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
1107                 MACSTR, MAC2STR(wpa_s->bssid));
1108         wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
1109                     trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1110         req[0] = WLAN_ACTION_SA_QUERY;
1111         req[1] = WLAN_SA_QUERY_REQUEST;
1112         os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1113         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1114                                 wpa_s->own_addr, wpa_s->bssid,
1115                                 req, sizeof(req), 0) < 0)
1116                 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
1117                         "Request");
1118 }
1119
1120
1121 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
1122 {
1123         struct wpa_supplicant *wpa_s = eloop_ctx;
1124         unsigned int timeout, sec, usec;
1125         u8 *trans_id, *nbuf;
1126
1127         if (wpa_s->sme.sa_query_count > 0 &&
1128             sme_check_sa_query_timeout(wpa_s))
1129                 return;
1130
1131         nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
1132                                 wpa_s->sme.sa_query_count + 1,
1133                                 WLAN_SA_QUERY_TR_ID_LEN);
1134         if (nbuf == NULL)
1135                 return;
1136         if (wpa_s->sme.sa_query_count == 0) {
1137                 /* Starting a new SA Query procedure */
1138                 os_get_time(&wpa_s->sme.sa_query_start);
1139         }
1140         trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
1141         wpa_s->sme.sa_query_trans_id = nbuf;
1142         wpa_s->sme.sa_query_count++;
1143
1144         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1145
1146         timeout = sa_query_retry_timeout;
1147         sec = ((timeout / 1000) * 1024) / 1000;
1148         usec = (timeout % 1000) * 1024;
1149         eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
1150
1151         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
1152                 wpa_s->sme.sa_query_count);
1153
1154         sme_send_sa_query_req(wpa_s, trans_id);
1155 }
1156
1157
1158 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
1159 {
1160         sme_sa_query_timer(wpa_s, NULL);
1161 }
1162
1163
1164 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
1165 {
1166         eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
1167         os_free(wpa_s->sme.sa_query_trans_id);
1168         wpa_s->sme.sa_query_trans_id = NULL;
1169         wpa_s->sme.sa_query_count = 0;
1170 }
1171
1172
1173 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1174                                  const u8 *da, u16 reason_code)
1175 {
1176         struct wpa_ssid *ssid;
1177
1178         if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME))
1179                 return;
1180         if (wpa_s->wpa_state != WPA_COMPLETED)
1181                 return;
1182         ssid = wpa_s->current_ssid;
1183         if (ssid == NULL ||
1184             (ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
1185              wpa_s->conf->pmf : ssid->ieee80211w) == NO_MGMT_FRAME_PROTECTION)
1186                 return;
1187         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1188                 return;
1189         if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1190             reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1191                 return;
1192         if (wpa_s->sme.sa_query_count > 0)
1193                 return;
1194
1195         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1196                 "possible AP/STA state mismatch - trigger SA Query");
1197         sme_start_sa_query(wpa_s);
1198 }
1199
1200
1201 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1202                      const u8 *data, size_t len)
1203 {
1204         int i;
1205
1206         if (wpa_s->sme.sa_query_trans_id == NULL ||
1207             len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1208             data[0] != WLAN_SA_QUERY_RESPONSE)
1209                 return;
1210         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1211                 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1212
1213         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1214                 return;
1215
1216         for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1217                 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1218                               i * WLAN_SA_QUERY_TR_ID_LEN,
1219                               data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1220                         break;
1221         }
1222
1223         if (i >= wpa_s->sme.sa_query_count) {
1224                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1225                         "transaction identifier found");
1226                 return;
1227         }
1228
1229         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1230                 "from " MACSTR, MAC2STR(sa));
1231         sme_stop_sa_query(wpa_s);
1232 }
1233
1234 #endif /* CONFIG_IEEE80211W */