wpa_supplicant/sme.c

   1 /*
   2  * wpa_supplicant - SME
   3  * Copyright (c) 2009-2010, 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 "rsn_supp/wpa.h"
  18 #include "rsn_supp/pmksa_cache.h"
  19 #include "config.h"
  20 #include "wpa_supplicant_i.h"
  21 #include "driver_i.h"
  22 #include "wpas_glue.h"
  23 #include "wps_supplicant.h"
  24 #include "p2p_supplicant.h"
  25 #include "notify.h"
  26 #include "bss.h"
  27 #include "scan.h"
  28 #include "sme.h"
  29 #include "hs20_supplicant.h"
  30
  31 #define SME_AUTH_TIMEOUT 5
  32 #define SME_ASSOC_TIMEOUT 5
  33
  34 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx);
  35 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx);
  36 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx);
  37 #ifdef CONFIG_IEEE80211W
  38 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s);
  39 #endif /* CONFIG_IEEE80211W */
  40
  41
  42 #ifdef CONFIG_SAE
  43
  44 static struct wpabuf * sme_auth_build_sae_commit(struct wpa_supplicant *wpa_s)
  45 {
  46         struct wpabuf *buf;
  47
  48         buf = wpabuf_alloc(4 + 2);
  49         if (buf == NULL)
  50                 return NULL;
  51
  52         wpabuf_put_le16(buf, 1); /* Transaction seq# */
  53         wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
  54         wpabuf_put_le16(buf, 19); /* Finite Cyclic Group */
  55         /* TODO: Anti-Clogging Token (if requested) */
  56         /* TODO: Scalar */
  57         /* TODO: Element */
  58
  59         return buf;
  60 }
  61
  62
  63 static struct wpabuf * sme_auth_build_sae_confirm(struct wpa_supplicant *wpa_s)
  64 {
  65         struct wpabuf *buf;
  66
  67         buf = wpabuf_alloc(4 + 2);
  68         if (buf == NULL)
  69                 return NULL;
  70
  71         wpabuf_put_le16(buf, 2); /* Transaction seq# */
  72         wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
  73         wpabuf_put_le16(buf, wpa_s->sme.sae_send_confirm);
  74         wpa_s->sme.sae_send_confirm++;
  75         /* TODO: Confirm */
  76
  77         return buf;
  78 }
  79
  80 #endif /* CONFIG_SAE */
  81
  82
  83 void sme_send_authentication(struct wpa_supplicant *wpa_s,
  84                              struct wpa_bss *bss, struct wpa_ssid *ssid,
  85                              int start)
  86 {
  87         struct wpa_driver_auth_params params;
  88         struct wpa_ssid *old_ssid;
  89 #ifdef CONFIG_IEEE80211R
  90         const u8 *ie;
  91 #endif /* CONFIG_IEEE80211R */
  92 #ifdef CONFIG_IEEE80211R
  93         const u8 *md = NULL;
  94 #endif /* CONFIG_IEEE80211R */
  95         int i, bssid_changed;
  96         struct wpabuf *resp = NULL;
  97
  98         if (bss == NULL) {
  99                 wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for "
 100                         "the network");
 101                 return;
 102         }
 103
 104         wpa_s->current_bss = bss;
 105
 106         os_memset(&params, 0, sizeof(params));
 107         wpa_s->reassociate = 0;
 108
 109         params.freq = bss->freq;
 110         params.bssid = bss->bssid;
 111         params.ssid = bss->ssid;
 112         params.ssid_len = bss->ssid_len;
 113         params.p2p = ssid->p2p_group;
 114
 115         if (wpa_s->sme.ssid_len != params.ssid_len ||
 116             os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
 117                 wpa_s->sme.prev_bssid_set = 0;
 118
 119         wpa_s->sme.freq = params.freq;
 120         os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
 121         wpa_s->sme.ssid_len = params.ssid_len;
 122
 123         params.auth_alg = WPA_AUTH_ALG_OPEN;
 124 #ifdef IEEE8021X_EAPOL
 125         if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
 126                 if (ssid->leap) {
 127                         if (ssid->non_leap == 0)
 128                                 params.auth_alg = WPA_AUTH_ALG_LEAP;
 129                         else
 130                                 params.auth_alg |= WPA_AUTH_ALG_LEAP;
 131                 }
 132         }
 133 #endif /* IEEE8021X_EAPOL */
 134         wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
 135                 params.auth_alg);
 136         if (ssid->auth_alg) {
 137                 params.auth_alg = ssid->auth_alg;
 138                 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
 139                         "0x%x", params.auth_alg);
 140         }
 141 #ifdef CONFIG_SAE
 142         if (wpa_key_mgmt_sae(ssid->key_mgmt)) {
 143                 const u8 *rsn;
 144                 struct wpa_ie_data ied;
 145
 146                 rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 147                 if (rsn &&
 148                     wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0) {
 149                         if (wpa_key_mgmt_sae(ied.key_mgmt)) {
 150                                 wpa_dbg(wpa_s, MSG_DEBUG, "Using SAE auth_alg");
 151                                 params.auth_alg = WPA_AUTH_ALG_SAE;
 152                         }
 153                 }
 154         }
 155 #endif /* CONFIG_SAE */
 156
 157         for (i = 0; i < NUM_WEP_KEYS; i++) {
 158                 if (ssid->wep_key_len[i])
 159                         params.wep_key[i] = ssid->wep_key[i];
 160                 params.wep_key_len[i] = ssid->wep_key_len[i];
 161         }
 162         params.wep_tx_keyidx = ssid->wep_tx_keyidx;
 163
 164         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 165         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 166         os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
 167         if (bssid_changed)
 168                 wpas_notify_bssid_changed(wpa_s);
 169
 170         if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
 171              wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
 172             wpa_key_mgmt_wpa(ssid->key_mgmt)) {
 173                 int try_opportunistic;
 174                 try_opportunistic = (ssid->proactive_key_caching < 0 ?
 175                                      wpa_s->conf->okc :
 176                                      ssid->proactive_key_caching) &&
 177                         (ssid->proto & WPA_PROTO_RSN);
 178                 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
 179                                             wpa_s->current_ssid,
 180                                             try_opportunistic) == 0)
 181                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
 182                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 183                 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
 184                                               wpa_s->sme.assoc_req_ie,
 185                                               &wpa_s->sme.assoc_req_ie_len)) {
 186                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 187                                 "key management and encryption suites");
 188                         return;
 189                 }
 190         } else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
 191                    wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) {
 192                 /*
 193                  * Both WPA and non-WPA IEEE 802.1X enabled in configuration -
 194                  * use non-WPA since the scan results did not indicate that the
 195                  * AP is using WPA or WPA2.
 196                  */
 197                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 198                 wpa_s->sme.assoc_req_ie_len = 0;
 199         } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
 200                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 201                 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
 202                                               wpa_s->sme.assoc_req_ie,
 203                                               &wpa_s->sme.assoc_req_ie_len)) {
 204                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 205                                 "key management and encryption suites (no "
 206                                 "scan results)");
 207                         return;
 208                 }
 209 #ifdef CONFIG_WPS
 210         } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 211                 struct wpabuf *wps_ie;
 212                 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
 213                 if (wps_ie && wpabuf_len(wps_ie) <=
 214                     sizeof(wpa_s->sme.assoc_req_ie)) {
 215                         wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
 216                         os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
 217                                   wpa_s->sme.assoc_req_ie_len);
 218                 } else
 219                         wpa_s->sme.assoc_req_ie_len = 0;
 220                 wpabuf_free(wps_ie);
 221                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 222 #endif /* CONFIG_WPS */
 223         } else {
 224                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 225                 wpa_s->sme.assoc_req_ie_len = 0;
 226         }
 227
 228 #ifdef CONFIG_IEEE80211R
 229         ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
 230         if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
 231                 md = ie + 2;
 232         wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
 233         if (md) {
 234                 /* Prepare for the next transition */
 235                 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
 236         }
 237
 238         if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) {
 239                 if (wpa_s->sme.assoc_req_ie_len + 5 <
 240                     sizeof(wpa_s->sme.assoc_req_ie)) {
 241                         struct rsn_mdie *mdie;
 242                         u8 *pos = wpa_s->sme.assoc_req_ie +
 243                                 wpa_s->sme.assoc_req_ie_len;
 244                         *pos++ = WLAN_EID_MOBILITY_DOMAIN;
 245                         *pos++ = sizeof(*mdie);
 246                         mdie = (struct rsn_mdie *) pos;
 247                         os_memcpy(mdie->mobility_domain, md,
 248                                   MOBILITY_DOMAIN_ID_LEN);
 249                         mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
 250                         wpa_s->sme.assoc_req_ie_len += 5;
 251                 }
 252
 253                 if (wpa_s->sme.ft_used &&
 254                     os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
 255                     wpa_sm_has_ptk(wpa_s->wpa)) {
 256                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT "
 257                                 "over-the-air");
 258                         params.auth_alg = WPA_AUTH_ALG_FT;
 259                         params.ie = wpa_s->sme.ft_ies;
 260                         params.ie_len = wpa_s->sme.ft_ies_len;
 261                 }
 262         }
 263 #endif /* CONFIG_IEEE80211R */
 264
 265 #ifdef CONFIG_IEEE80211W
 266         wpa_s->sme.mfp = ssid->ieee80211w;
 267         if (ssid->ieee80211w != NO_MGMT_FRAME_PROTECTION) {
 268                 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 269                 struct wpa_ie_data _ie;
 270                 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
 271                     _ie.capabilities &
 272                     (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
 273                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
 274                                 "MFP: require MFP");
 275                         wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
 276                 }
 277         }
 278 #endif /* CONFIG_IEEE80211W */
 279
 280 #ifdef CONFIG_P2P
 281         if (wpa_s->global->p2p) {
 282                 u8 *pos;
 283                 size_t len;
 284                 int res;
 285                 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
 286                 len = sizeof(wpa_s->sme.assoc_req_ie) -
 287                         wpa_s->sme.assoc_req_ie_len;
 288                 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
 289                                             ssid->p2p_group);
 290                 if (res >= 0)
 291                         wpa_s->sme.assoc_req_ie_len += res;
 292         }
 293 #endif /* CONFIG_P2P */
 294
 295 #ifdef CONFIG_HS20
 296         if (wpa_s->conf->hs20) {
 297                 struct wpabuf *hs20;
 298                 hs20 = wpabuf_alloc(20);
 299                 if (hs20) {
 300                         wpas_hs20_add_indication(hs20);
 301                         os_memcpy(wpa_s->sme.assoc_req_ie +
 302                                   wpa_s->sme.assoc_req_ie_len,
 303                                   wpabuf_head(hs20), wpabuf_len(hs20));
 304                         wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
 305                         wpabuf_free(hs20);
 306                 }
 307         }
 308 #endif /* CONFIG_HS20 */
 309
 310 #ifdef CONFIG_INTERWORKING
 311         if (wpa_s->conf->interworking) {
 312                 u8 *pos = wpa_s->sme.assoc_req_ie;
 313                 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
 314                         pos += 2 + pos[1];
 315                 os_memmove(pos + 6, pos,
 316                            wpa_s->sme.assoc_req_ie_len -
 317                            (pos - wpa_s->sme.assoc_req_ie));
 318                 wpa_s->sme.assoc_req_ie_len += 6;
 319                 *pos++ = WLAN_EID_EXT_CAPAB;
 320                 *pos++ = 4;
 321                 *pos++ = 0x00;
 322                 *pos++ = 0x00;
 323                 *pos++ = 0x00;
 324                 *pos++ = 0x80; /* Bit 31 - Interworking */
 325         }
 326 #endif /* CONFIG_INTERWORKING */
 327
 328 #ifdef CONFIG_SAE
 329         if (params.auth_alg == WPA_AUTH_ALG_SAE) {
 330                 if (start)
 331                         resp = sme_auth_build_sae_commit(wpa_s);
 332                 else
 333                         resp = sme_auth_build_sae_confirm(wpa_s);
 334                 if (resp == NULL)
 335                         return;
 336                 params.sae_data = wpabuf_head(resp);
 337                 params.sae_data_len = wpabuf_len(resp);
 338                 wpa_s->sme.sae_state = start ? SME_SAE_COMMIT : SME_SAE_CONFIRM;
 339         }
 340 #endif /* CONFIG_SAE */
 341
 342         wpa_supplicant_cancel_sched_scan(wpa_s);
 343         wpa_supplicant_cancel_scan(wpa_s);
 344
 345         wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
 346                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 347                 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
 348
 349         wpa_clear_keys(wpa_s, bss->bssid);
 350         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 351         old_ssid = wpa_s->current_ssid;
 352         wpa_s->current_ssid = ssid;
 353         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
 354         wpa_supplicant_initiate_eapol(wpa_s);
 355         if (old_ssid != wpa_s->current_ssid)
 356                 wpas_notify_network_changed(wpa_s);
 357
 358         wpa_s->sme.auth_alg = params.auth_alg;
 359         if (wpa_drv_authenticate(wpa_s, &params) < 0) {
 360                 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
 361                         "driver failed");
 362                 wpas_connection_failed(wpa_s, bss->bssid);
 363                 wpa_supplicant_mark_disassoc(wpa_s);
 364                 wpabuf_free(resp);
 365                 return;
 366         }
 367
 368         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 369                                NULL);
 370
 371         /*
 372          * Association will be started based on the authentication event from
 373          * the driver.
 374          */
 375
 376         wpabuf_free(resp);
 377 }
 378
 379
 380 void sme_authenticate(struct wpa_supplicant *wpa_s,
 381                       struct wpa_bss *bss, struct wpa_ssid *ssid)
 382 {
 383         wpa_s->sme.sae_state = SME_SAE_INIT;
 384         wpa_s->sme.sae_send_confirm = 0;
 385         sme_send_authentication(wpa_s, bss, ssid, 1);
 386 }
 387
 388
 389 #ifdef CONFIG_SAE
 390
 391 static int sme_sae_process_commit(struct wpa_supplicant *wpa_s, const u8 *data,
 392                                   size_t len)
 393 {
 394         /* Check Finite Cyclic Group */
 395         if (len < 2)
 396                 return -1;
 397         if (WPA_GET_LE16(data) != 19) {
 398                 wpa_printf(MSG_DEBUG, "SAE: Unsupported Finite Cyclic Group %u",
 399                            WPA_GET_LE16(data));
 400                 return -1;
 401         }
 402
 403         /* TODO */
 404
 405         return 0;
 406 }
 407
 408
 409 static int sme_sae_process_confirm(struct wpa_supplicant *wpa_s, const u8 *data,
 410                                    size_t len)
 411 {
 412         u16 rc;
 413
 414         if (len < 2)
 415                 return -1;
 416         rc = WPA_GET_LE16(data);
 417         wpa_printf(MSG_DEBUG, "SAE: peer-send-confirm %u", rc);
 418
 419         /* TODO */
 420         return 0;
 421 }
 422
 423
 424 static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
 425                         u16 status_code, const u8 *data, size_t len)
 426 {
 427         wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
 428                 "status code %u", auth_transaction, status_code);
 429         wpa_hexdump(MSG_DEBUG, "SME: SAE fields", data, len);
 430
 431         if (status_code != WLAN_STATUS_SUCCESS)
 432                 return -1;
 433
 434         if (auth_transaction == 1) {
 435                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
 436                 if (wpa_s->current_bss == NULL ||
 437                     wpa_s->current_ssid == NULL)
 438                         return -1;
 439                 if (wpa_s->sme.sae_state != SME_SAE_COMMIT)
 440                         return -1;
 441                 if (sme_sae_process_commit(wpa_s, data, len) < 0)
 442                         return -1;
 443                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 444                                         wpa_s->current_ssid, 0);
 445                 return 0;
 446         } else if (auth_transaction == 2) {
 447                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
 448                 if (wpa_s->sme.sae_state != SME_SAE_CONFIRM)
 449                         return -1;
 450                 if (sme_sae_process_confirm(wpa_s, data, len) < 0)
 451                         return -1;
 452                 return 1;
 453         }
 454
 455         return -1;
 456 }
 457 #endif /* CONFIG_SAE */
 458
 459
 460 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
 461 {
 462         struct wpa_ssid *ssid = wpa_s->current_ssid;
 463
 464         if (ssid == NULL) {
 465                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 466                         "when network is not selected");
 467                 return;
 468         }
 469
 470         if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
 471                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 472                         "when not in authenticating state");
 473                 return;
 474         }
 475
 476         if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
 477                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
 478                         "unexpected peer " MACSTR,
 479                         MAC2STR(data->auth.peer));
 480                 return;
 481         }
 482
 483         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
 484                 " auth_type=%d auth_transaction=%d status_code=%d",
 485                 MAC2STR(data->auth.peer), data->auth.auth_type,
 486                 data->auth.auth_transaction, data->auth.status_code);
 487         wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
 488                     data->auth.ies, data->auth.ies_len);
 489
 490         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 491
 492 #ifdef CONFIG_SAE
 493         if (data->auth.auth_type == WLAN_AUTH_SAE) {
 494                 int res;
 495                 res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
 496                                    data->auth.status_code, data->auth.ies,
 497                                    data->auth.ies_len);
 498                 if (res < 0) {
 499                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 500                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 501
 502                 }
 503                 if (res != 1)
 504                         return;
 505         }
 506 #endif /* CONFIG_SAE */
 507
 508         if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
 509                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
 510                         "code %d)", data->auth.status_code);
 511
 512                 if (data->auth.status_code !=
 513                     WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
 514                     wpa_s->sme.auth_alg == data->auth.auth_type ||
 515                     wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
 516                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 517                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 518                         return;
 519                 }
 520
 521                 switch (data->auth.auth_type) {
 522                 case WLAN_AUTH_OPEN:
 523                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 524
 525                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
 526                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 527                                                  wpa_s->current_ssid);
 528                         return;
 529
 530                 case WLAN_AUTH_SHARED_KEY:
 531                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
 532
 533                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
 534                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 535                                                  wpa_s->current_ssid);
 536                         return;
 537
 538                 default:
 539                         return;
 540                 }
 541         }
 542
 543 #ifdef CONFIG_IEEE80211R
 544         if (data->auth.auth_type == WLAN_AUTH_FT) {
 545                 union wpa_event_data edata;
 546                 os_memset(&edata, 0, sizeof(edata));
 547                 edata.ft_ies.ies = data->auth.ies;
 548                 edata.ft_ies.ies_len = data->auth.ies_len;
 549                 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
 550                 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
 551         }
 552 #endif /* CONFIG_IEEE80211R */
 553
 554         sme_associate(wpa_s, ssid->mode, data->auth.peer,
 555                       data->auth.auth_type);
 556 }
 557
 558
 559 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
 560                    const u8 *bssid, u16 auth_type)
 561 {
 562         struct wpa_driver_associate_params params;
 563         struct ieee802_11_elems elems;
 564 #ifdef CONFIG_HT_OVERRIDES
 565         struct ieee80211_ht_capabilities htcaps;
 566         struct ieee80211_ht_capabilities htcaps_mask;
 567 #endif /* CONFIG_HT_OVERRIDES */
 568
 569         os_memset(&params, 0, sizeof(params));
 570         params.bssid = bssid;
 571         params.ssid = wpa_s->sme.ssid;
 572         params.ssid_len = wpa_s->sme.ssid_len;
 573         params.freq = wpa_s->sme.freq;
 574         params.bg_scan_period = wpa_s->current_ssid ?
 575                 wpa_s->current_ssid->bg_scan_period : -1;
 576         params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
 577                 wpa_s->sme.assoc_req_ie : NULL;
 578         params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
 579         params.pairwise_suite = cipher_suite2driver(wpa_s->pairwise_cipher);
 580         params.group_suite = cipher_suite2driver(wpa_s->group_cipher);
 581 #ifdef CONFIG_HT_OVERRIDES
 582         os_memset(&htcaps, 0, sizeof(htcaps));
 583         os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
 584         params.htcaps = (u8 *) &htcaps;
 585         params.htcaps_mask = (u8 *) &htcaps_mask;
 586         wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, &params);
 587 #endif /* CONFIG_HT_OVERRIDES */
 588 #ifdef CONFIG_IEEE80211R
 589         if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
 590                 params.wpa_ie = wpa_s->sme.ft_ies;
 591                 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
 592         }
 593 #endif /* CONFIG_IEEE80211R */
 594         params.mode = mode;
 595         params.mgmt_frame_protection = wpa_s->sme.mfp;
 596         if (wpa_s->sme.prev_bssid_set)
 597                 params.prev_bssid = wpa_s->sme.prev_bssid;
 598
 599         wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
 600                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 601                 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
 602                 params.freq);
 603
 604         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
 605
 606         if (params.wpa_ie == NULL ||
 607             ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
 608             < 0) {
 609                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
 610                 os_memset(&elems, 0, sizeof(elems));
 611         }
 612         if (elems.rsn_ie) {
 613                 params.wpa_proto = WPA_PROTO_RSN;
 614                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
 615                                         elems.rsn_ie_len + 2);
 616         } else if (elems.wpa_ie) {
 617                 params.wpa_proto = WPA_PROTO_WPA;
 618                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
 619                                         elems.wpa_ie_len + 2);
 620         } else
 621                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 622         if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
 623                 params.p2p = 1;
 624
 625         if (wpa_s->parent->set_sta_uapsd)
 626                 params.uapsd = wpa_s->parent->sta_uapsd;
 627         else
 628                 params.uapsd = -1;
 629
 630         if (wpa_drv_associate(wpa_s, &params) < 0) {
 631                 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
 632                         "driver failed");
 633                 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 634                 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 635                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 636                 return;
 637         }
 638
 639         eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
 640                                NULL);
 641 }
 642
 643
 644 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
 645                       const u8 *ies, size_t ies_len)
 646 {
 647         if (md == NULL || ies == NULL) {
 648                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
 649                 os_free(wpa_s->sme.ft_ies);
 650                 wpa_s->sme.ft_ies = NULL;
 651                 wpa_s->sme.ft_ies_len = 0;
 652                 wpa_s->sme.ft_used = 0;
 653                 return 0;
 654         }
 655
 656         os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
 657         wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
 658         os_free(wpa_s->sme.ft_ies);
 659         wpa_s->sme.ft_ies = os_malloc(ies_len);
 660         if (wpa_s->sme.ft_ies == NULL)
 661                 return -1;
 662         os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
 663         wpa_s->sme.ft_ies_len = ies_len;
 664         return 0;
 665 }
 666
 667
 668 static void sme_deauth(struct wpa_supplicant *wpa_s)
 669 {
 670         int bssid_changed;
 671
 672         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 673
 674         if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
 675                                    WLAN_REASON_DEAUTH_LEAVING) < 0) {
 676                 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
 677                         "failed");
 678         }
 679         wpa_s->sme.prev_bssid_set = 0;
 680
 681         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 682         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 683         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 684         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 685         if (bssid_changed)
 686                 wpas_notify_bssid_changed(wpa_s);
 687 }
 688
 689
 690 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
 691                             union wpa_event_data *data)
 692 {
 693         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
 694                 "status code %d", MAC2STR(wpa_s->pending_bssid),
 695                 data->assoc_reject.status_code);
 696
 697         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 698
 699         /*
 700          * For now, unconditionally terminate the previous authentication. In
 701          * theory, this should not be needed, but mac80211 gets quite confused
 702          * if the authentication is left pending.. Some roaming cases might
 703          * benefit from using the previous authentication, so this could be
 704          * optimized in the future.
 705          */
 706         sme_deauth(wpa_s);
 707 }
 708
 709
 710 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
 711                               union wpa_event_data *data)
 712 {
 713         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
 714         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 715         wpa_supplicant_mark_disassoc(wpa_s);
 716 }
 717
 718
 719 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
 720                                union wpa_event_data *data)
 721 {
 722         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
 723         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 724         wpa_supplicant_mark_disassoc(wpa_s);
 725 }
 726
 727
 728 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
 729                         union wpa_event_data *data)
 730 {
 731         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
 732         if (wpa_s->sme.prev_bssid_set) {
 733                 /*
 734                  * cfg80211/mac80211 can get into somewhat confused state if
 735                  * the AP only disassociates us and leaves us in authenticated
 736                  * state. For now, force the state to be cleared to avoid
 737                  * confusing errors if we try to associate with the AP again.
 738                  */
 739                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
 740                         "driver state");
 741                 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
 742                                        WLAN_REASON_DEAUTH_LEAVING);
 743         }
 744 }
 745
 746
 747 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
 748 {
 749         struct wpa_supplicant *wpa_s = eloop_ctx;
 750         if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
 751                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
 752                 sme_deauth(wpa_s);
 753         }
 754 }
 755
 756
 757 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
 758 {
 759         struct wpa_supplicant *wpa_s = eloop_ctx;
 760         if (wpa_s->wpa_state == WPA_ASSOCIATING) {
 761                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
 762                 sme_deauth(wpa_s);
 763         }
 764 }
 765
 766
 767 void sme_state_changed(struct wpa_supplicant *wpa_s)
 768 {
 769         /* Make sure timers are cleaned up appropriately. */
 770         if (wpa_s->wpa_state != WPA_ASSOCIATING)
 771                 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 772         if (wpa_s->wpa_state != WPA_AUTHENTICATING)
 773                 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 774 }
 775
 776
 777 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
 778                                        const u8 *prev_pending_bssid)
 779 {
 780         /*
 781          * mac80211-workaround to force deauth on failed auth cmd,
 782          * requires us to remain in authenticating state to allow the
 783          * second authentication attempt to be continued properly.
 784          */
 785         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
 786                 "to proceed after disconnection event");
 787         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 788         os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
 789
 790         /*
 791          * Re-arm authentication timer in case auth fails for whatever reason.
 792          */
 793         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 794         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 795                                NULL);
 796 }
 797
 798
 799 void sme_deinit(struct wpa_supplicant *wpa_s)
 800 {
 801         os_free(wpa_s->sme.ft_ies);
 802         wpa_s->sme.ft_ies = NULL;
 803         wpa_s->sme.ft_ies_len = 0;
 804 #ifdef CONFIG_IEEE80211W
 805         sme_stop_sa_query(wpa_s);
 806 #endif /* CONFIG_IEEE80211W */
 807
 808         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 809         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 810         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
 811 }
 812
 813
 814 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
 815                                    const u8 *chan_list, u8 num_channels,
 816                                    u8 num_intol)
 817 {
 818         struct ieee80211_2040_bss_coex_ie *bc_ie;
 819         struct ieee80211_2040_intol_chan_report *ic_report;
 820         struct wpabuf *buf;
 821
 822         wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR,
 823                    MAC2STR(wpa_s->bssid));
 824
 825         buf = wpabuf_alloc(2 + /* action.category + action_code */
 826                            sizeof(struct ieee80211_2040_bss_coex_ie) +
 827                            sizeof(struct ieee80211_2040_intol_chan_report) +
 828                            num_channels);
 829         if (buf == NULL)
 830                 return;
 831
 832         wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
 833         wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
 834
 835         bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
 836         bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
 837         bc_ie->length = 1;
 838         if (num_intol)
 839                 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
 840
 841         if (num_channels > 0) {
 842                 ic_report = wpabuf_put(buf, sizeof(*ic_report));
 843                 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
 844                 ic_report->length = num_channels + 1;
 845                 ic_report->op_class = 0;
 846                 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
 847                           num_channels);
 848         }
 849
 850         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
 851                                 wpa_s->own_addr, wpa_s->bssid,
 852                                 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
 853                 wpa_msg(wpa_s, MSG_INFO,
 854                         "SME: Failed to send 20/40 BSS Coexistence frame");
 855         }
 856
 857         wpabuf_free(buf);
 858 }
 859
 860
 861 /**
 862  * enum wpas_band - Frequency band
 863  * @WPAS_BAND_2GHZ: 2.4 GHz ISM band
 864  * @WPAS_BAND_5GHZ: around 5 GHz band (4.9 - 5.7 GHz)
 865  */
 866 enum wpas_band {
 867         WPAS_BAND_2GHZ,
 868         WPAS_BAND_5GHZ,
 869         WPAS_BAND_INVALID
 870 };
 871
 872 /**
 873  * freq_to_channel - Convert frequency into channel info
 874  * @channel: Buffer for returning channel number
 875  * Returns: Band (2 or 5 GHz)
 876  */
 877 static enum wpas_band freq_to_channel(int freq, u8 *channel)
 878 {
 879         enum wpas_band band = (freq <= 2484) ? WPAS_BAND_2GHZ : WPAS_BAND_5GHZ;
 880         u8 chan = 0;
 881
 882         if (freq >= 2412 && freq <= 2472)
 883                 chan = (freq - 2407) / 5;
 884         else if (freq == 2484)
 885                 chan = 14;
 886         else if (freq >= 5180 && freq <= 5805)
 887                 chan = (freq - 5000) / 5;
 888
 889         *channel = chan;
 890         return band;
 891 }
 892
 893
 894 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
 895 {
 896         struct wpa_bss *bss;
 897         const u8 *ie;
 898         u16 ht_cap;
 899         u8 chan_list[P2P_MAX_CHANNELS], channel;
 900         u8 num_channels = 0, num_intol = 0, i;
 901
 902         if (!wpa_s->sme.sched_obss_scan)
 903                 return 0;
 904
 905         wpa_s->sme.sched_obss_scan = 0;
 906         if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
 907                 return 1;
 908
 909         /*
 910          * Check whether AP uses regulatory triplet or channel triplet in
 911          * country info. Right now the operating class of the BSS channel
 912          * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
 913          * based on the assumption that operating class triplet is not used in
 914          * beacon frame. If the First Channel Number/Operating Extension
 915          * Identifier octet has a positive integer value of 201 or greater,
 916          * then its operating class triplet.
 917          *
 918          * TODO: If Supported Operating Classes element is present in beacon
 919          * frame, have to lookup operating class in Annex E and fill them in
 920          * 2040 coex frame.
 921          */
 922         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
 923         if (ie && (ie[1] >= 6) && (ie[5] >= 201))
 924                 return 1;
 925
 926         os_memset(chan_list, 0, sizeof(chan_list));
 927
 928         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
 929                 /* Skip other band bss */
 930                 if (freq_to_channel(bss->freq, &channel) != WPAS_BAND_2GHZ)
 931                         continue;
 932
 933                 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
 934                 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
 935
 936                 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
 937                         /* Check whether the channel is already considered */
 938                         for (i = 0; i < num_channels; i++) {
 939                                 if (channel == chan_list[i])
 940                                         break;
 941                         }
 942                         if (i != num_channels)
 943                                 continue;
 944
 945                         if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
 946                                 num_intol++;
 947
 948                         chan_list[num_channels++] = channel;
 949                 }
 950         }
 951
 952         sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
 953         return 1;
 954 }
 955
 956
 957 static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
 958                                           u16 num_modes,
 959                                           enum hostapd_hw_mode mode)
 960 {
 961         u16 i;
 962
 963         for (i = 0; i < num_modes; i++) {
 964                 if (modes[i].mode == mode)
 965                         return &modes[i];
 966         }
 967
 968         return NULL;
 969 }
 970
 971
 972 static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s,
 973                                         enum hostapd_hw_mode band,
 974                                         struct wpa_driver_scan_params *params)
 975 {
 976         /* Include only supported channels for the specified band */
 977         struct hostapd_hw_modes *mode;
 978         int count, i;
 979
 980         mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band);
 981         if (mode == NULL) {
 982                 /* No channels supported in this band - use empty list */
 983                 params->freqs = os_zalloc(sizeof(int));
 984                 return;
 985         }
 986
 987         params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
 988         if (params->freqs == NULL)
 989                 return;
 990         for (count = 0, i = 0; i < mode->num_channels; i++) {
 991                 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
 992                         continue;
 993                 params->freqs[count++] = mode->channels[i].freq;
 994         }
 995 }
 996
 997
 998 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
 999 {
1000         struct wpa_supplicant *wpa_s = eloop_ctx;
1001         struct wpa_driver_scan_params params;
1002
1003         if (!wpa_s->current_bss) {
1004                 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
1005                 return;
1006         }
1007
1008         os_memset(&params, 0, sizeof(params));
1009         wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G, &params);
1010         wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
1011
1012         if (wpa_supplicant_trigger_scan(wpa_s, &params))
1013                 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
1014         else
1015                 wpa_s->sme.sched_obss_scan = 1;
1016         os_free(params.freqs);
1017
1018         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1019                                sme_obss_scan_timeout, wpa_s, NULL);
1020 }
1021
1022
1023 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
1024 {
1025         const u8 *ie;
1026         struct wpa_bss *bss = wpa_s->current_bss;
1027         struct wpa_ssid *ssid = wpa_s->current_ssid;
1028         struct hostapd_hw_modes *hw_mode = NULL;
1029         int i;
1030
1031         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1032         wpa_s->sme.sched_obss_scan = 0;
1033         if (!enable)
1034                 return;
1035
1036         /*
1037          * Schedule OBSS scan if driver is using station SME in wpa_supplicant
1038          * or it expects OBSS scan to be performed by wpa_supplicant.
1039          */
1040         if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
1041               (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
1042             ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
1043                 return;
1044
1045         if (!wpa_s->hw.modes)
1046                 return;
1047
1048         /* only HT caps in 11g mode are relevant */
1049         for (i = 0; i < wpa_s->hw.num_modes; i++) {
1050                 hw_mode = &wpa_s->hw.modes[i];
1051                 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
1052                         break;
1053         }
1054
1055         /* Driver does not support HT40 for 11g or doesn't have 11g. */
1056         if (i == wpa_s->hw.num_modes || !hw_mode ||
1057             !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1058                 return;
1059
1060         if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
1061                 return; /* Not associated on 2.4 GHz band */
1062
1063         /* Check whether AP supports HT40 */
1064         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
1065         if (!ie || ie[1] < 2 ||
1066             !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1067                 return; /* AP does not support HT40 */
1068
1069         ie = wpa_bss_get_ie(wpa_s->current_bss,
1070                             WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
1071         if (!ie || ie[1] < 14)
1072                 return; /* AP does not request OBSS scans */
1073
1074         wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
1075         if (wpa_s->sme.obss_scan_int < 10) {
1076                 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
1077                            "replaced with the minimum 10 sec",
1078                            wpa_s->sme.obss_scan_int);
1079                 wpa_s->sme.obss_scan_int = 10;
1080         }
1081         wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
1082                    wpa_s->sme.obss_scan_int);
1083         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1084                                sme_obss_scan_timeout, wpa_s, NULL);
1085 }
1086
1087
1088 #ifdef CONFIG_IEEE80211W
1089
1090 static const unsigned int sa_query_max_timeout = 1000;
1091 static const unsigned int sa_query_retry_timeout = 201;
1092
1093 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
1094 {
1095         u32 tu;
1096         struct os_time now, passed;
1097         os_get_time(&now);
1098         os_time_sub(&now, &wpa_s->sme.sa_query_start, &passed);
1099         tu = (passed.sec * 1000000 + passed.usec) / 1024;
1100         if (sa_query_max_timeout < tu) {
1101                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
1102                 sme_stop_sa_query(wpa_s);
1103                 wpa_supplicant_deauthenticate(
1104                         wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
1105                 return 1;
1106         }
1107
1108         return 0;
1109 }
1110
1111
1112 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
1113                                   const u8 *trans_id)
1114 {
1115         u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
1116         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
1117                 MACSTR, MAC2STR(wpa_s->bssid));
1118         wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
1119                     trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1120         req[0] = WLAN_ACTION_SA_QUERY;
1121         req[1] = WLAN_SA_QUERY_REQUEST;
1122         os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1123         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1124                                 wpa_s->own_addr, wpa_s->bssid,
1125                                 req, sizeof(req), 0) < 0)
1126                 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
1127                         "Request");
1128 }
1129
1130
1131 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
1132 {
1133         struct wpa_supplicant *wpa_s = eloop_ctx;
1134         unsigned int timeout, sec, usec;
1135         u8 *trans_id, *nbuf;
1136
1137         if (wpa_s->sme.sa_query_count > 0 &&
1138             sme_check_sa_query_timeout(wpa_s))
1139                 return;
1140
1141         nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
1142                                 wpa_s->sme.sa_query_count + 1,
1143                                 WLAN_SA_QUERY_TR_ID_LEN);
1144         if (nbuf == NULL)
1145                 return;
1146         if (wpa_s->sme.sa_query_count == 0) {
1147                 /* Starting a new SA Query procedure */
1148                 os_get_time(&wpa_s->sme.sa_query_start);
1149         }
1150         trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
1151         wpa_s->sme.sa_query_trans_id = nbuf;
1152         wpa_s->sme.sa_query_count++;
1153
1154         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1155
1156         timeout = sa_query_retry_timeout;
1157         sec = ((timeout / 1000) * 1024) / 1000;
1158         usec = (timeout % 1000) * 1024;
1159         eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
1160
1161         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
1162                 wpa_s->sme.sa_query_count);
1163
1164         sme_send_sa_query_req(wpa_s, trans_id);
1165 }
1166
1167
1168 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
1169 {
1170         sme_sa_query_timer(wpa_s, NULL);
1171 }
1172
1173
1174 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
1175 {
1176         eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
1177         os_free(wpa_s->sme.sa_query_trans_id);
1178         wpa_s->sme.sa_query_trans_id = NULL;
1179         wpa_s->sme.sa_query_count = 0;
1180 }
1181
1182
1183 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1184                                  const u8 *da, u16 reason_code)
1185 {
1186         struct wpa_ssid *ssid;
1187
1188         if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME))
1189                 return;
1190         if (wpa_s->wpa_state != WPA_COMPLETED)
1191                 return;
1192         ssid = wpa_s->current_ssid;
1193         if (ssid == NULL || ssid->ieee80211w == 0)
1194                 return;
1195         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1196                 return;
1197         if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1198             reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1199                 return;
1200         if (wpa_s->sme.sa_query_count > 0)
1201                 return;
1202
1203         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1204                 "possible AP/STA state mismatch - trigger SA Query");
1205         sme_start_sa_query(wpa_s);
1206 }
1207
1208
1209 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1210                      const u8 *data, size_t len)
1211 {
1212         int i;
1213
1214         if (wpa_s->sme.sa_query_trans_id == NULL ||
1215             len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1216             data[0] != WLAN_SA_QUERY_RESPONSE)
1217                 return;
1218         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1219                 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1220
1221         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1222                 return;
1223
1224         for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1225                 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1226                               i * WLAN_SA_QUERY_TR_ID_LEN,
1227                               data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1228                         break;
1229         }
1230
1231         if (i >= wpa_s->sme.sa_query_count) {
1232                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1233                         "transaction identifier found");
1234                 return;
1235         }
1236
1237         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1238                 "from " MACSTR, MAC2STR(sa));
1239         sme_stop_sa_query(wpa_s);
1240 }
1241
1242 #endif /* CONFIG_IEEE80211W */