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         size_t len;
  51
  52         if (ssid->passphrase == NULL) {
  53                 wpa_printf(MSG_DEBUG, "SAE: No password available");
  54                 return NULL;
  55         }
  56
  57         if (sae_prepare_commit(wpa_s->own_addr, bssid,
  58                                (u8 *) ssid->passphrase,
  59                                os_strlen(ssid->passphrase),
  60                                &wpa_s->sme.sae) < 0) {
  61                 wpa_printf(MSG_DEBUG, "SAE: Could not pick PWE");
  62                 return NULL;
  63         }
  64
  65         len = wpa_s->sme.sae_token ? wpabuf_len(wpa_s->sme.sae_token) : 0;
  66         buf = wpabuf_alloc(4 + SAE_COMMIT_MAX_LEN + len);
  67         if (buf == NULL)
  68                 return NULL;
  69
  70         wpabuf_put_le16(buf, 1); /* Transaction seq# */
  71         wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
  72         sae_write_commit(&wpa_s->sme.sae, buf, wpa_s->sme.sae_token);
  73
  74         return buf;
  75 }
  76
  77
  78 static struct wpabuf * sme_auth_build_sae_confirm(struct wpa_supplicant *wpa_s)
  79 {
  80         struct wpabuf *buf;
  81
  82         buf = wpabuf_alloc(4 + SAE_CONFIRM_MAX_LEN);
  83         if (buf == NULL)
  84                 return NULL;
  85
  86         wpabuf_put_le16(buf, 2); /* Transaction seq# */
  87         wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
  88         sae_write_confirm(&wpa_s->sme.sae, buf);
  89
  90         return buf;
  91 }
  92
  93 #endif /* CONFIG_SAE */
  94
  95
  96 static void sme_send_authentication(struct wpa_supplicant *wpa_s,
  97                                     struct wpa_bss *bss, struct wpa_ssid *ssid,
  98                                     int start)
  99 {
 100         struct wpa_driver_auth_params params;
 101         struct wpa_ssid *old_ssid;
 102 #ifdef CONFIG_IEEE80211R
 103         const u8 *ie;
 104 #endif /* CONFIG_IEEE80211R */
 105 #ifdef CONFIG_IEEE80211R
 106         const u8 *md = NULL;
 107 #endif /* CONFIG_IEEE80211R */
 108         int i, bssid_changed;
 109         struct wpabuf *resp = NULL;
 110         u8 ext_capab[10];
 111         int ext_capab_len;
 112
 113         if (bss == NULL) {
 114                 wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for "
 115                         "the network");
 116                 return;
 117         }
 118
 119         wpa_s->current_bss = bss;
 120
 121         os_memset(&params, 0, sizeof(params));
 122         wpa_s->reassociate = 0;
 123
 124         params.freq = bss->freq;
 125         params.bssid = bss->bssid;
 126         params.ssid = bss->ssid;
 127         params.ssid_len = bss->ssid_len;
 128         params.p2p = ssid->p2p_group;
 129
 130         if (wpa_s->sme.ssid_len != params.ssid_len ||
 131             os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
 132                 wpa_s->sme.prev_bssid_set = 0;
 133
 134         wpa_s->sme.freq = params.freq;
 135         os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
 136         wpa_s->sme.ssid_len = params.ssid_len;
 137
 138         params.auth_alg = WPA_AUTH_ALG_OPEN;
 139 #ifdef IEEE8021X_EAPOL
 140         if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
 141                 if (ssid->leap) {
 142                         if (ssid->non_leap == 0)
 143                                 params.auth_alg = WPA_AUTH_ALG_LEAP;
 144                         else
 145                                 params.auth_alg |= WPA_AUTH_ALG_LEAP;
 146                 }
 147         }
 148 #endif /* IEEE8021X_EAPOL */
 149         wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
 150                 params.auth_alg);
 151         if (ssid->auth_alg) {
 152                 params.auth_alg = ssid->auth_alg;
 153                 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
 154                         "0x%x", params.auth_alg);
 155         }
 156 #ifdef CONFIG_SAE
 157         if (wpa_key_mgmt_sae(ssid->key_mgmt)) {
 158                 const u8 *rsn;
 159                 struct wpa_ie_data ied;
 160
 161                 rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 162                 if (rsn &&
 163                     wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0) {
 164                         if (wpa_key_mgmt_sae(ied.key_mgmt)) {
 165                                 wpa_dbg(wpa_s, MSG_DEBUG, "Using SAE auth_alg");
 166                                 params.auth_alg = WPA_AUTH_ALG_SAE;
 167                         }
 168                 }
 169         }
 170 #endif /* CONFIG_SAE */
 171
 172         for (i = 0; i < NUM_WEP_KEYS; i++) {
 173                 if (ssid->wep_key_len[i])
 174                         params.wep_key[i] = ssid->wep_key[i];
 175                 params.wep_key_len[i] = ssid->wep_key_len[i];
 176         }
 177         params.wep_tx_keyidx = ssid->wep_tx_keyidx;
 178
 179         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 180         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 181         os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
 182         if (bssid_changed)
 183                 wpas_notify_bssid_changed(wpa_s);
 184
 185         if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
 186              wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
 187             wpa_key_mgmt_wpa(ssid->key_mgmt)) {
 188                 int try_opportunistic;
 189                 try_opportunistic = (ssid->proactive_key_caching < 0 ?
 190                                      wpa_s->conf->okc :
 191                                      ssid->proactive_key_caching) &&
 192                         (ssid->proto & WPA_PROTO_RSN);
 193                 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
 194                                             wpa_s->current_ssid,
 195                                             try_opportunistic) == 0)
 196                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
 197                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 198                 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
 199                                               wpa_s->sme.assoc_req_ie,
 200                                               &wpa_s->sme.assoc_req_ie_len)) {
 201                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 202                                 "key management and encryption suites");
 203                         return;
 204                 }
 205         } else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
 206                    wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) {
 207                 /*
 208                  * Both WPA and non-WPA IEEE 802.1X enabled in configuration -
 209                  * use non-WPA since the scan results did not indicate that the
 210                  * AP is using WPA or WPA2.
 211                  */
 212                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 213                 wpa_s->sme.assoc_req_ie_len = 0;
 214         } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
 215                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 216                 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
 217                                               wpa_s->sme.assoc_req_ie,
 218                                               &wpa_s->sme.assoc_req_ie_len)) {
 219                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 220                                 "key management and encryption suites (no "
 221                                 "scan results)");
 222                         return;
 223                 }
 224 #ifdef CONFIG_WPS
 225         } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 226                 struct wpabuf *wps_ie;
 227                 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
 228                 if (wps_ie && wpabuf_len(wps_ie) <=
 229                     sizeof(wpa_s->sme.assoc_req_ie)) {
 230                         wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
 231                         os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
 232                                   wpa_s->sme.assoc_req_ie_len);
 233                 } else
 234                         wpa_s->sme.assoc_req_ie_len = 0;
 235                 wpabuf_free(wps_ie);
 236                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 237 #endif /* CONFIG_WPS */
 238         } else {
 239                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 240                 wpa_s->sme.assoc_req_ie_len = 0;
 241         }
 242
 243 #ifdef CONFIG_IEEE80211R
 244         ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
 245         if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
 246                 md = ie + 2;
 247         wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
 248         if (md) {
 249                 /* Prepare for the next transition */
 250                 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
 251         }
 252
 253         if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) {
 254                 if (wpa_s->sme.assoc_req_ie_len + 5 <
 255                     sizeof(wpa_s->sme.assoc_req_ie)) {
 256                         struct rsn_mdie *mdie;
 257                         u8 *pos = wpa_s->sme.assoc_req_ie +
 258                                 wpa_s->sme.assoc_req_ie_len;
 259                         *pos++ = WLAN_EID_MOBILITY_DOMAIN;
 260                         *pos++ = sizeof(*mdie);
 261                         mdie = (struct rsn_mdie *) pos;
 262                         os_memcpy(mdie->mobility_domain, md,
 263                                   MOBILITY_DOMAIN_ID_LEN);
 264                         mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
 265                         wpa_s->sme.assoc_req_ie_len += 5;
 266                 }
 267
 268                 if (wpa_s->sme.ft_used &&
 269                     os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
 270                     wpa_sm_has_ptk(wpa_s->wpa)) {
 271                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT "
 272                                 "over-the-air");
 273                         params.auth_alg = WPA_AUTH_ALG_FT;
 274                         params.ie = wpa_s->sme.ft_ies;
 275                         params.ie_len = wpa_s->sme.ft_ies_len;
 276                 }
 277         }
 278 #endif /* CONFIG_IEEE80211R */
 279
 280 #ifdef CONFIG_IEEE80211W
 281         wpa_s->sme.mfp = ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
 282                 wpa_s->conf->pmf : ssid->ieee80211w;
 283         if (wpa_s->sme.mfp != NO_MGMT_FRAME_PROTECTION) {
 284                 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 285                 struct wpa_ie_data _ie;
 286                 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
 287                     _ie.capabilities &
 288                     (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
 289                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
 290                                 "MFP: require MFP");
 291                         wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
 292                 }
 293         }
 294 #endif /* CONFIG_IEEE80211W */
 295
 296 #ifdef CONFIG_P2P
 297         if (wpa_s->global->p2p) {
 298                 u8 *pos;
 299                 size_t len;
 300                 int res;
 301                 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
 302                 len = sizeof(wpa_s->sme.assoc_req_ie) -
 303                         wpa_s->sme.assoc_req_ie_len;
 304                 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
 305                                             ssid->p2p_group);
 306                 if (res >= 0)
 307                         wpa_s->sme.assoc_req_ie_len += res;
 308         }
 309 #endif /* CONFIG_P2P */
 310
 311 #ifdef CONFIG_HS20
 312         if (wpa_s->conf->hs20) {
 313                 struct wpabuf *hs20;
 314                 hs20 = wpabuf_alloc(20);
 315                 if (hs20) {
 316                         wpas_hs20_add_indication(hs20);
 317                         os_memcpy(wpa_s->sme.assoc_req_ie +
 318                                   wpa_s->sme.assoc_req_ie_len,
 319                                   wpabuf_head(hs20), wpabuf_len(hs20));
 320                         wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
 321                         wpabuf_free(hs20);
 322                 }
 323         }
 324 #endif /* CONFIG_HS20 */
 325
 326         ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab);
 327         if (ext_capab_len > 0) {
 328                 u8 *pos = wpa_s->sme.assoc_req_ie;
 329                 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
 330                         pos += 2 + pos[1];
 331                 os_memmove(pos + ext_capab_len, pos,
 332                            wpa_s->sme.assoc_req_ie_len -
 333                            (pos - wpa_s->sme.assoc_req_ie));
 334                 wpa_s->sme.assoc_req_ie_len += ext_capab_len;
 335                 os_memcpy(pos, ext_capab, ext_capab_len);
 336         }
 337
 338 #ifdef CONFIG_SAE
 339         if (params.auth_alg == WPA_AUTH_ALG_SAE) {
 340                 if (start)
 341                         resp = sme_auth_build_sae_commit(wpa_s, ssid,
 342                                                          bss->bssid);
 343                 else
 344                         resp = sme_auth_build_sae_confirm(wpa_s);
 345                 if (resp == NULL)
 346                         return;
 347                 params.sae_data = wpabuf_head(resp);
 348                 params.sae_data_len = wpabuf_len(resp);
 349                 wpa_s->sme.sae.state = start ? SAE_COMMITTED : SAE_CONFIRMED;
 350         }
 351 #endif /* CONFIG_SAE */
 352
 353         wpa_supplicant_cancel_sched_scan(wpa_s);
 354         wpa_supplicant_cancel_scan(wpa_s);
 355
 356         wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
 357                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 358                 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
 359
 360         wpa_clear_keys(wpa_s, bss->bssid);
 361         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 362         old_ssid = wpa_s->current_ssid;
 363         wpa_s->current_ssid = ssid;
 364         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
 365         wpa_supplicant_initiate_eapol(wpa_s);
 366         if (old_ssid != wpa_s->current_ssid)
 367                 wpas_notify_network_changed(wpa_s);
 368
 369         wpa_s->sme.auth_alg = params.auth_alg;
 370         if (wpa_drv_authenticate(wpa_s, &params) < 0) {
 371                 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
 372                         "driver failed");
 373                 wpas_connection_failed(wpa_s, bss->bssid);
 374                 wpa_supplicant_mark_disassoc(wpa_s);
 375                 wpabuf_free(resp);
 376                 return;
 377         }
 378
 379         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 380                                NULL);
 381
 382         /*
 383          * Association will be started based on the authentication event from
 384          * the driver.
 385          */
 386
 387         wpabuf_free(resp);
 388 }
 389
 390
 391 void sme_authenticate(struct wpa_supplicant *wpa_s,
 392                       struct wpa_bss *bss, struct wpa_ssid *ssid)
 393 {
 394 #ifdef CONFIG_SAE
 395         wpa_s->sme.sae.state = SAE_NOTHING;
 396         wpa_s->sme.sae.send_confirm = 0;
 397 #endif /* CONFIG_SAE */
 398         sme_send_authentication(wpa_s, bss, ssid, 1);
 399 }
 400
 401
 402 #ifdef CONFIG_SAE
 403
 404 static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
 405                         u16 status_code, const u8 *data, size_t len)
 406 {
 407         wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
 408                 "status code %u", auth_transaction, status_code);
 409         wpa_hexdump(MSG_DEBUG, "SME: SAE fields", data, len);
 410
 411         if (auth_transaction == 1 &&
 412             status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
 413             wpa_s->sme.sae.state == SAE_COMMITTED &&
 414             wpa_s->current_bss && wpa_s->current_ssid) {
 415                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE anti-clogging token "
 416                         "requested");
 417                 wpabuf_free(wpa_s->sme.sae_token);
 418                 wpa_s->sme.sae_token = wpabuf_alloc_copy(data, len);
 419                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 420                                         wpa_s->current_ssid, 1);
 421                 return 0;
 422         }
 423
 424         if (status_code != WLAN_STATUS_SUCCESS)
 425                 return -1;
 426
 427         if (auth_transaction == 1) {
 428                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
 429                 if (wpa_s->current_bss == NULL ||
 430                     wpa_s->current_ssid == NULL)
 431                         return -1;
 432                 if (wpa_s->sme.sae.state != SAE_COMMITTED)
 433                         return -1;
 434                 if (sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL) !=
 435                     WLAN_STATUS_SUCCESS)
 436                         return -1;
 437
 438                 if (sae_process_commit(&wpa_s->sme.sae) < 0) {
 439                         wpa_printf(MSG_DEBUG, "SAE: Failed to process peer "
 440                                    "commit");
 441                         return -1;
 442                 }
 443
 444                 wpabuf_free(wpa_s->sme.sae_token);
 445                 wpa_s->sme.sae_token = NULL;
 446                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 447                                         wpa_s->current_ssid, 0);
 448                 return 0;
 449         } else if (auth_transaction == 2) {
 450                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
 451                 if (wpa_s->sme.sae.state != SAE_CONFIRMED)
 452                         return -1;
 453                 if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0)
 454                         return -1;
 455                 wpa_s->sme.sae.state = SAE_ACCEPTED;
 456                 return 1;
 457         }
 458
 459         return -1;
 460 }
 461 #endif /* CONFIG_SAE */
 462
 463
 464 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
 465 {
 466         struct wpa_ssid *ssid = wpa_s->current_ssid;
 467
 468         if (ssid == NULL) {
 469                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 470                         "when network is not selected");
 471                 return;
 472         }
 473
 474         if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
 475                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 476                         "when not in authenticating state");
 477                 return;
 478         }
 479
 480         if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
 481                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
 482                         "unexpected peer " MACSTR,
 483                         MAC2STR(data->auth.peer));
 484                 return;
 485         }
 486
 487         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
 488                 " auth_type=%d auth_transaction=%d status_code=%d",
 489                 MAC2STR(data->auth.peer), data->auth.auth_type,
 490                 data->auth.auth_transaction, data->auth.status_code);
 491         wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
 492                     data->auth.ies, data->auth.ies_len);
 493
 494         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 495
 496 #ifdef CONFIG_SAE
 497         if (data->auth.auth_type == WLAN_AUTH_SAE) {
 498                 int res;
 499                 res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
 500                                    data->auth.status_code, data->auth.ies,
 501                                    data->auth.ies_len);
 502                 if (res < 0) {
 503                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 504                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 505
 506                 }
 507                 if (res != 1)
 508                         return;
 509
 510                 wpa_printf(MSG_DEBUG, "SME: SAE completed - setting PMK for "
 511                            "4-way handshake");
 512                 wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN);
 513         }
 514 #endif /* CONFIG_SAE */
 515
 516         if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
 517                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
 518                         "code %d)", data->auth.status_code);
 519
 520                 if (data->auth.status_code !=
 521                     WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
 522                     wpa_s->sme.auth_alg == data->auth.auth_type ||
 523                     wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
 524                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 525                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 526                         return;
 527                 }
 528
 529                 switch (data->auth.auth_type) {
 530                 case WLAN_AUTH_OPEN:
 531                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 532
 533                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
 534                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 535                                                  wpa_s->current_ssid);
 536                         return;
 537
 538                 case WLAN_AUTH_SHARED_KEY:
 539                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
 540
 541                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
 542                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 543                                                  wpa_s->current_ssid);
 544                         return;
 545
 546                 default:
 547                         return;
 548                 }
 549         }
 550
 551 #ifdef CONFIG_IEEE80211R
 552         if (data->auth.auth_type == WLAN_AUTH_FT) {
 553                 union wpa_event_data edata;
 554                 os_memset(&edata, 0, sizeof(edata));
 555                 edata.ft_ies.ies = data->auth.ies;
 556                 edata.ft_ies.ies_len = data->auth.ies_len;
 557                 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
 558                 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
 559         }
 560 #endif /* CONFIG_IEEE80211R */
 561
 562         sme_associate(wpa_s, ssid->mode, data->auth.peer,
 563                       data->auth.auth_type);
 564 }
 565
 566
 567 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
 568                    const u8 *bssid, u16 auth_type)
 569 {
 570         struct wpa_driver_associate_params params;
 571         struct ieee802_11_elems elems;
 572 #ifdef CONFIG_HT_OVERRIDES
 573         struct ieee80211_ht_capabilities htcaps;
 574         struct ieee80211_ht_capabilities htcaps_mask;
 575 #endif /* CONFIG_HT_OVERRIDES */
 576
 577         os_memset(&params, 0, sizeof(params));
 578         params.bssid = bssid;
 579         params.ssid = wpa_s->sme.ssid;
 580         params.ssid_len = wpa_s->sme.ssid_len;
 581         params.freq = wpa_s->sme.freq;
 582         params.bg_scan_period = wpa_s->current_ssid ?
 583                 wpa_s->current_ssid->bg_scan_period : -1;
 584         params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
 585                 wpa_s->sme.assoc_req_ie : NULL;
 586         params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
 587         params.pairwise_suite = cipher_suite2driver(wpa_s->pairwise_cipher);
 588         params.group_suite = cipher_suite2driver(wpa_s->group_cipher);
 589 #ifdef CONFIG_HT_OVERRIDES
 590         os_memset(&htcaps, 0, sizeof(htcaps));
 591         os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
 592         params.htcaps = (u8 *) &htcaps;
 593         params.htcaps_mask = (u8 *) &htcaps_mask;
 594         wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, &params);
 595 #endif /* CONFIG_HT_OVERRIDES */
 596 #ifdef CONFIG_IEEE80211R
 597         if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
 598                 params.wpa_ie = wpa_s->sme.ft_ies;
 599                 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
 600         }
 601 #endif /* CONFIG_IEEE80211R */
 602         params.mode = mode;
 603         params.mgmt_frame_protection = wpa_s->sme.mfp;
 604         if (wpa_s->sme.prev_bssid_set)
 605                 params.prev_bssid = wpa_s->sme.prev_bssid;
 606
 607         wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
 608                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 609                 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
 610                 params.freq);
 611
 612         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
 613
 614         if (params.wpa_ie == NULL ||
 615             ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
 616             < 0) {
 617                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
 618                 os_memset(&elems, 0, sizeof(elems));
 619         }
 620         if (elems.rsn_ie) {
 621                 params.wpa_proto = WPA_PROTO_RSN;
 622                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
 623                                         elems.rsn_ie_len + 2);
 624         } else if (elems.wpa_ie) {
 625                 params.wpa_proto = WPA_PROTO_WPA;
 626                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
 627                                         elems.wpa_ie_len + 2);
 628         } else
 629                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 630         if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
 631                 params.p2p = 1;
 632
 633         if (wpa_s->parent->set_sta_uapsd)
 634                 params.uapsd = wpa_s->parent->sta_uapsd;
 635         else
 636                 params.uapsd = -1;
 637
 638         if (wpa_drv_associate(wpa_s, &params) < 0) {
 639                 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
 640                         "driver failed");
 641                 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 642                 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 643                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 644                 return;
 645         }
 646
 647         eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
 648                                NULL);
 649 }
 650
 651
 652 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
 653                       const u8 *ies, size_t ies_len)
 654 {
 655         if (md == NULL || ies == NULL) {
 656                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
 657                 os_free(wpa_s->sme.ft_ies);
 658                 wpa_s->sme.ft_ies = NULL;
 659                 wpa_s->sme.ft_ies_len = 0;
 660                 wpa_s->sme.ft_used = 0;
 661                 return 0;
 662         }
 663
 664         os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
 665         wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
 666         os_free(wpa_s->sme.ft_ies);
 667         wpa_s->sme.ft_ies = os_malloc(ies_len);
 668         if (wpa_s->sme.ft_ies == NULL)
 669                 return -1;
 670         os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
 671         wpa_s->sme.ft_ies_len = ies_len;
 672         return 0;
 673 }
 674
 675
 676 static void sme_deauth(struct wpa_supplicant *wpa_s)
 677 {
 678         int bssid_changed;
 679
 680         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 681
 682         if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
 683                                    WLAN_REASON_DEAUTH_LEAVING) < 0) {
 684                 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
 685                         "failed");
 686         }
 687         wpa_s->sme.prev_bssid_set = 0;
 688
 689         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 690         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 691         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 692         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 693         if (bssid_changed)
 694                 wpas_notify_bssid_changed(wpa_s);
 695 }
 696
 697
 698 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
 699                             union wpa_event_data *data)
 700 {
 701         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
 702                 "status code %d", MAC2STR(wpa_s->pending_bssid),
 703                 data->assoc_reject.status_code);
 704
 705         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 706
 707         /*
 708          * For now, unconditionally terminate the previous authentication. In
 709          * theory, this should not be needed, but mac80211 gets quite confused
 710          * if the authentication is left pending.. Some roaming cases might
 711          * benefit from using the previous authentication, so this could be
 712          * optimized in the future.
 713          */
 714         sme_deauth(wpa_s);
 715 }
 716
 717
 718 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
 719                               union wpa_event_data *data)
 720 {
 721         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
 722         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 723         wpa_supplicant_mark_disassoc(wpa_s);
 724 }
 725
 726
 727 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
 728                                union wpa_event_data *data)
 729 {
 730         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
 731         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 732         wpa_supplicant_mark_disassoc(wpa_s);
 733 }
 734
 735
 736 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
 737                         union wpa_event_data *data)
 738 {
 739         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
 740         if (wpa_s->sme.prev_bssid_set) {
 741                 /*
 742                  * cfg80211/mac80211 can get into somewhat confused state if
 743                  * the AP only disassociates us and leaves us in authenticated
 744                  * state. For now, force the state to be cleared to avoid
 745                  * confusing errors if we try to associate with the AP again.
 746                  */
 747                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
 748                         "driver state");
 749                 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
 750                                        WLAN_REASON_DEAUTH_LEAVING);
 751         }
 752 }
 753
 754
 755 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
 756 {
 757         struct wpa_supplicant *wpa_s = eloop_ctx;
 758         if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
 759                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
 760                 sme_deauth(wpa_s);
 761         }
 762 }
 763
 764
 765 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
 766 {
 767         struct wpa_supplicant *wpa_s = eloop_ctx;
 768         if (wpa_s->wpa_state == WPA_ASSOCIATING) {
 769                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
 770                 sme_deauth(wpa_s);
 771         }
 772 }
 773
 774
 775 void sme_state_changed(struct wpa_supplicant *wpa_s)
 776 {
 777         /* Make sure timers are cleaned up appropriately. */
 778         if (wpa_s->wpa_state != WPA_ASSOCIATING)
 779                 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 780         if (wpa_s->wpa_state != WPA_AUTHENTICATING)
 781                 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 782 }
 783
 784
 785 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
 786                                        const u8 *prev_pending_bssid)
 787 {
 788         /*
 789          * mac80211-workaround to force deauth on failed auth cmd,
 790          * requires us to remain in authenticating state to allow the
 791          * second authentication attempt to be continued properly.
 792          */
 793         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
 794                 "to proceed after disconnection event");
 795         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 796         os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
 797
 798         /*
 799          * Re-arm authentication timer in case auth fails for whatever reason.
 800          */
 801         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 802         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 803                                NULL);
 804 }
 805
 806
 807 void sme_deinit(struct wpa_supplicant *wpa_s)
 808 {
 809         os_free(wpa_s->sme.ft_ies);
 810         wpa_s->sme.ft_ies = NULL;
 811         wpa_s->sme.ft_ies_len = 0;
 812 #ifdef CONFIG_IEEE80211W
 813         sme_stop_sa_query(wpa_s);
 814 #endif /* CONFIG_IEEE80211W */
 815 #ifdef CONFIG_SAE
 816         wpabuf_free(wpa_s->sme.sae_token);
 817         wpa_s->sme.sae_token = NULL;
 818 #endif /* CONFIG_SAE */
 819
 820         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 821         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 822         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
 823 }
 824
 825
 826 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
 827                                    const u8 *chan_list, u8 num_channels,
 828                                    u8 num_intol)
 829 {
 830         struct ieee80211_2040_bss_coex_ie *bc_ie;
 831         struct ieee80211_2040_intol_chan_report *ic_report;
 832         struct wpabuf *buf;
 833
 834         wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR,
 835                    MAC2STR(wpa_s->bssid));
 836
 837         buf = wpabuf_alloc(2 + /* action.category + action_code */
 838                            sizeof(struct ieee80211_2040_bss_coex_ie) +
 839                            sizeof(struct ieee80211_2040_intol_chan_report) +
 840                            num_channels);
 841         if (buf == NULL)
 842                 return;
 843
 844         wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
 845         wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
 846
 847         bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
 848         bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
 849         bc_ie->length = 1;
 850         if (num_intol)
 851                 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
 852
 853         if (num_channels > 0) {
 854                 ic_report = wpabuf_put(buf, sizeof(*ic_report));
 855                 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
 856                 ic_report->length = num_channels + 1;
 857                 ic_report->op_class = 0;
 858                 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
 859                           num_channels);
 860         }
 861
 862         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
 863                                 wpa_s->own_addr, wpa_s->bssid,
 864                                 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
 865                 wpa_msg(wpa_s, MSG_INFO,
 866                         "SME: Failed to send 20/40 BSS Coexistence frame");
 867         }
 868
 869         wpabuf_free(buf);
 870 }
 871
 872
 873 /**
 874  * enum wpas_band - Frequency band
 875  * @WPAS_BAND_2GHZ: 2.4 GHz ISM band
 876  * @WPAS_BAND_5GHZ: around 5 GHz band (4.9 - 5.7 GHz)
 877  */
 878 enum wpas_band {
 879         WPAS_BAND_2GHZ,
 880         WPAS_BAND_5GHZ,
 881         WPAS_BAND_INVALID
 882 };
 883
 884 /**
 885  * freq_to_channel - Convert frequency into channel info
 886  * @channel: Buffer for returning channel number
 887  * Returns: Band (2 or 5 GHz)
 888  */
 889 static enum wpas_band freq_to_channel(int freq, u8 *channel)
 890 {
 891         enum wpas_band band = (freq <= 2484) ? WPAS_BAND_2GHZ : WPAS_BAND_5GHZ;
 892         u8 chan = 0;
 893
 894         if (freq >= 2412 && freq <= 2472)
 895                 chan = (freq - 2407) / 5;
 896         else if (freq == 2484)
 897                 chan = 14;
 898         else if (freq >= 5180 && freq <= 5805)
 899                 chan = (freq - 5000) / 5;
 900
 901         *channel = chan;
 902         return band;
 903 }
 904
 905
 906 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
 907 {
 908         struct wpa_bss *bss;
 909         const u8 *ie;
 910         u16 ht_cap;
 911         u8 chan_list[P2P_MAX_CHANNELS], channel;
 912         u8 num_channels = 0, num_intol = 0, i;
 913
 914         if (!wpa_s->sme.sched_obss_scan)
 915                 return 0;
 916
 917         wpa_s->sme.sched_obss_scan = 0;
 918         if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
 919                 return 1;
 920
 921         /*
 922          * Check whether AP uses regulatory triplet or channel triplet in
 923          * country info. Right now the operating class of the BSS channel
 924          * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
 925          * based on the assumption that operating class triplet is not used in
 926          * beacon frame. If the First Channel Number/Operating Extension
 927          * Identifier octet has a positive integer value of 201 or greater,
 928          * then its operating class triplet.
 929          *
 930          * TODO: If Supported Operating Classes element is present in beacon
 931          * frame, have to lookup operating class in Annex E and fill them in
 932          * 2040 coex frame.
 933          */
 934         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
 935         if (ie && (ie[1] >= 6) && (ie[5] >= 201))
 936                 return 1;
 937
 938         os_memset(chan_list, 0, sizeof(chan_list));
 939
 940         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
 941                 /* Skip other band bss */
 942                 if (freq_to_channel(bss->freq, &channel) != WPAS_BAND_2GHZ)
 943                         continue;
 944
 945                 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
 946                 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
 947
 948                 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
 949                         /* Check whether the channel is already considered */
 950                         for (i = 0; i < num_channels; i++) {
 951                                 if (channel == chan_list[i])
 952                                         break;
 953                         }
 954                         if (i != num_channels)
 955                                 continue;
 956
 957                         if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
 958                                 num_intol++;
 959
 960                         chan_list[num_channels++] = channel;
 961                 }
 962         }
 963
 964         sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
 965         return 1;
 966 }
 967
 968
 969 static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
 970                                           u16 num_modes,
 971                                           enum hostapd_hw_mode mode)
 972 {
 973         u16 i;
 974
 975         for (i = 0; i < num_modes; i++) {
 976                 if (modes[i].mode == mode)
 977                         return &modes[i];
 978         }
 979
 980         return NULL;
 981 }
 982
 983
 984 static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s,
 985                                         enum hostapd_hw_mode band,
 986                                         struct wpa_driver_scan_params *params)
 987 {
 988         /* Include only supported channels for the specified band */
 989         struct hostapd_hw_modes *mode;
 990         int count, i;
 991
 992         mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band);
 993         if (mode == NULL) {
 994                 /* No channels supported in this band - use empty list */
 995                 params->freqs = os_zalloc(sizeof(int));
 996                 return;
 997         }
 998
 999         params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
1000         if (params->freqs == NULL)
1001                 return;
1002         for (count = 0, i = 0; i < mode->num_channels; i++) {
1003                 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
1004                         continue;
1005                 params->freqs[count++] = mode->channels[i].freq;
1006         }
1007 }
1008
1009
1010 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1011 {
1012         struct wpa_supplicant *wpa_s = eloop_ctx;
1013         struct wpa_driver_scan_params params;
1014
1015         if (!wpa_s->current_bss) {
1016                 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
1017                 return;
1018         }
1019
1020         os_memset(&params, 0, sizeof(params));
1021         wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G, &params);
1022         wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
1023
1024         if (wpa_supplicant_trigger_scan(wpa_s, &params))
1025                 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
1026         else
1027                 wpa_s->sme.sched_obss_scan = 1;
1028         os_free(params.freqs);
1029
1030         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1031                                sme_obss_scan_timeout, wpa_s, NULL);
1032 }
1033
1034
1035 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
1036 {
1037         const u8 *ie;
1038         struct wpa_bss *bss = wpa_s->current_bss;
1039         struct wpa_ssid *ssid = wpa_s->current_ssid;
1040         struct hostapd_hw_modes *hw_mode = NULL;
1041         int i;
1042
1043         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1044         wpa_s->sme.sched_obss_scan = 0;
1045         if (!enable)
1046                 return;
1047
1048         /*
1049          * Schedule OBSS scan if driver is using station SME in wpa_supplicant
1050          * or it expects OBSS scan to be performed by wpa_supplicant.
1051          */
1052         if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
1053               (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
1054             ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
1055                 return;
1056
1057         if (!wpa_s->hw.modes)
1058                 return;
1059
1060         /* only HT caps in 11g mode are relevant */
1061         for (i = 0; i < wpa_s->hw.num_modes; i++) {
1062                 hw_mode = &wpa_s->hw.modes[i];
1063                 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
1064                         break;
1065         }
1066
1067         /* Driver does not support HT40 for 11g or doesn't have 11g. */
1068         if (i == wpa_s->hw.num_modes || !hw_mode ||
1069             !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1070                 return;
1071
1072         if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
1073                 return; /* Not associated on 2.4 GHz band */
1074
1075         /* Check whether AP supports HT40 */
1076         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
1077         if (!ie || ie[1] < 2 ||
1078             !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1079                 return; /* AP does not support HT40 */
1080
1081         ie = wpa_bss_get_ie(wpa_s->current_bss,
1082                             WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
1083         if (!ie || ie[1] < 14)
1084                 return; /* AP does not request OBSS scans */
1085
1086         wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
1087         if (wpa_s->sme.obss_scan_int < 10) {
1088                 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
1089                            "replaced with the minimum 10 sec",
1090                            wpa_s->sme.obss_scan_int);
1091                 wpa_s->sme.obss_scan_int = 10;
1092         }
1093         wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
1094                    wpa_s->sme.obss_scan_int);
1095         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1096                                sme_obss_scan_timeout, wpa_s, NULL);
1097 }
1098
1099
1100 #ifdef CONFIG_IEEE80211W
1101
1102 static const unsigned int sa_query_max_timeout = 1000;
1103 static const unsigned int sa_query_retry_timeout = 201;
1104
1105 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
1106 {
1107         u32 tu;
1108         struct os_time now, passed;
1109         os_get_time(&now);
1110         os_time_sub(&now, &wpa_s->sme.sa_query_start, &passed);
1111         tu = (passed.sec * 1000000 + passed.usec) / 1024;
1112         if (sa_query_max_timeout < tu) {
1113                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
1114                 sme_stop_sa_query(wpa_s);
1115                 wpa_supplicant_deauthenticate(
1116                         wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
1117                 return 1;
1118         }
1119
1120         return 0;
1121 }
1122
1123
1124 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
1125                                   const u8 *trans_id)
1126 {
1127         u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
1128         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
1129                 MACSTR, MAC2STR(wpa_s->bssid));
1130         wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
1131                     trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1132         req[0] = WLAN_ACTION_SA_QUERY;
1133         req[1] = WLAN_SA_QUERY_REQUEST;
1134         os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1135         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1136                                 wpa_s->own_addr, wpa_s->bssid,
1137                                 req, sizeof(req), 0) < 0)
1138                 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
1139                         "Request");
1140 }
1141
1142
1143 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
1144 {
1145         struct wpa_supplicant *wpa_s = eloop_ctx;
1146         unsigned int timeout, sec, usec;
1147         u8 *trans_id, *nbuf;
1148
1149         if (wpa_s->sme.sa_query_count > 0 &&
1150             sme_check_sa_query_timeout(wpa_s))
1151                 return;
1152
1153         nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
1154                                 wpa_s->sme.sa_query_count + 1,
1155                                 WLAN_SA_QUERY_TR_ID_LEN);
1156         if (nbuf == NULL)
1157                 return;
1158         if (wpa_s->sme.sa_query_count == 0) {
1159                 /* Starting a new SA Query procedure */
1160                 os_get_time(&wpa_s->sme.sa_query_start);
1161         }
1162         trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
1163         wpa_s->sme.sa_query_trans_id = nbuf;
1164         wpa_s->sme.sa_query_count++;
1165
1166         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1167
1168         timeout = sa_query_retry_timeout;
1169         sec = ((timeout / 1000) * 1024) / 1000;
1170         usec = (timeout % 1000) * 1024;
1171         eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
1172
1173         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
1174                 wpa_s->sme.sa_query_count);
1175
1176         sme_send_sa_query_req(wpa_s, trans_id);
1177 }
1178
1179
1180 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
1181 {
1182         sme_sa_query_timer(wpa_s, NULL);
1183 }
1184
1185
1186 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
1187 {
1188         eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
1189         os_free(wpa_s->sme.sa_query_trans_id);
1190         wpa_s->sme.sa_query_trans_id = NULL;
1191         wpa_s->sme.sa_query_count = 0;
1192 }
1193
1194
1195 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1196                                  const u8 *da, u16 reason_code)
1197 {
1198         struct wpa_ssid *ssid;
1199
1200         if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME))
1201                 return;
1202         if (wpa_s->wpa_state != WPA_COMPLETED)
1203                 return;
1204         ssid = wpa_s->current_ssid;
1205         if (ssid == NULL ||
1206             (ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
1207              wpa_s->conf->pmf : ssid->ieee80211w) == NO_MGMT_FRAME_PROTECTION)
1208                 return;
1209         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1210                 return;
1211         if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1212             reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1213                 return;
1214         if (wpa_s->sme.sa_query_count > 0)
1215                 return;
1216
1217         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1218                 "possible AP/STA state mismatch - trigger SA Query");
1219         sme_start_sa_query(wpa_s);
1220 }
1221
1222
1223 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1224                      const u8 *data, size_t len)
1225 {
1226         int i;
1227
1228         if (wpa_s->sme.sa_query_trans_id == NULL ||
1229             len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1230             data[0] != WLAN_SA_QUERY_RESPONSE)
1231                 return;
1232         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1233                 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1234
1235         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1236                 return;
1237
1238         for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1239                 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1240                               i * WLAN_SA_QUERY_TR_ID_LEN,
1241                               data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1242                         break;
1243         }
1244
1245         if (i >= wpa_s->sme.sa_query_count) {
1246                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1247                         "transaction identifier found");
1248                 return;
1249         }
1250
1251         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1252                 "from " MACSTR, MAC2STR(sa));
1253         sme_stop_sa_query(wpa_s);
1254 }
1255
1256 #endif /* CONFIG_IEEE80211W */