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 static 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 == MGMT_FRAME_PROTECTION_DEFAULT ?
 267                 wpa_s->conf->pmf : ssid->ieee80211w;
 268         if (wpa_s->sme.mfp != NO_MGMT_FRAME_PROTECTION) {
 269                 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 270                 struct wpa_ie_data _ie;
 271                 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
 272                     _ie.capabilities &
 273                     (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
 274                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
 275                                 "MFP: require MFP");
 276                         wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
 277                 }
 278         }
 279 #endif /* CONFIG_IEEE80211W */
 280
 281 #ifdef CONFIG_P2P
 282         if (wpa_s->global->p2p) {
 283                 u8 *pos;
 284                 size_t len;
 285                 int res;
 286                 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
 287                 len = sizeof(wpa_s->sme.assoc_req_ie) -
 288                         wpa_s->sme.assoc_req_ie_len;
 289                 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
 290                                             ssid->p2p_group);
 291                 if (res >= 0)
 292                         wpa_s->sme.assoc_req_ie_len += res;
 293         }
 294 #endif /* CONFIG_P2P */
 295
 296 #ifdef CONFIG_HS20
 297         if (wpa_s->conf->hs20) {
 298                 struct wpabuf *hs20;
 299                 hs20 = wpabuf_alloc(20);
 300                 if (hs20) {
 301                         wpas_hs20_add_indication(hs20);
 302                         os_memcpy(wpa_s->sme.assoc_req_ie +
 303                                   wpa_s->sme.assoc_req_ie_len,
 304                                   wpabuf_head(hs20), wpabuf_len(hs20));
 305                         wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
 306                         wpabuf_free(hs20);
 307                 }
 308         }
 309 #endif /* CONFIG_HS20 */
 310
 311 #ifdef CONFIG_INTERWORKING
 312         if (wpa_s->conf->interworking) {
 313                 u8 *pos = wpa_s->sme.assoc_req_ie;
 314                 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
 315                         pos += 2 + pos[1];
 316                 os_memmove(pos + 6, pos,
 317                            wpa_s->sme.assoc_req_ie_len -
 318                            (pos - wpa_s->sme.assoc_req_ie));
 319                 wpa_s->sme.assoc_req_ie_len += 6;
 320                 *pos++ = WLAN_EID_EXT_CAPAB;
 321                 *pos++ = 4;
 322                 *pos++ = 0x00;
 323                 *pos++ = 0x00;
 324                 *pos++ = 0x00;
 325                 *pos++ = 0x80; /* Bit 31 - Interworking */
 326         }
 327 #endif /* CONFIG_INTERWORKING */
 328
 329 #ifdef CONFIG_SAE
 330         if (params.auth_alg == WPA_AUTH_ALG_SAE) {
 331                 if (start)
 332                         resp = sme_auth_build_sae_commit(wpa_s);
 333                 else
 334                         resp = sme_auth_build_sae_confirm(wpa_s);
 335                 if (resp == NULL)
 336                         return;
 337                 params.sae_data = wpabuf_head(resp);
 338                 params.sae_data_len = wpabuf_len(resp);
 339                 wpa_s->sme.sae_state = start ? SME_SAE_COMMIT : SME_SAE_CONFIRM;
 340         }
 341 #endif /* CONFIG_SAE */
 342
 343         wpa_supplicant_cancel_sched_scan(wpa_s);
 344         wpa_supplicant_cancel_scan(wpa_s);
 345
 346         wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
 347                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 348                 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
 349
 350         wpa_clear_keys(wpa_s, bss->bssid);
 351         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 352         old_ssid = wpa_s->current_ssid;
 353         wpa_s->current_ssid = ssid;
 354         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
 355         wpa_supplicant_initiate_eapol(wpa_s);
 356         if (old_ssid != wpa_s->current_ssid)
 357                 wpas_notify_network_changed(wpa_s);
 358
 359         wpa_s->sme.auth_alg = params.auth_alg;
 360         if (wpa_drv_authenticate(wpa_s, &params) < 0) {
 361                 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
 362                         "driver failed");
 363                 wpas_connection_failed(wpa_s, bss->bssid);
 364                 wpa_supplicant_mark_disassoc(wpa_s);
 365                 wpabuf_free(resp);
 366                 return;
 367         }
 368
 369         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 370                                NULL);
 371
 372         /*
 373          * Association will be started based on the authentication event from
 374          * the driver.
 375          */
 376
 377         wpabuf_free(resp);
 378 }
 379
 380
 381 void sme_authenticate(struct wpa_supplicant *wpa_s,
 382                       struct wpa_bss *bss, struct wpa_ssid *ssid)
 383 {
 384         wpa_s->sme.sae_state = SME_SAE_INIT;
 385         wpa_s->sme.sae_send_confirm = 0;
 386         sme_send_authentication(wpa_s, bss, ssid, 1);
 387 }
 388
 389
 390 #ifdef CONFIG_SAE
 391
 392 static int sme_sae_process_commit(struct wpa_supplicant *wpa_s, const u8 *data,
 393                                   size_t len)
 394 {
 395         /* Check Finite Cyclic Group */
 396         if (len < 2)
 397                 return -1;
 398         if (WPA_GET_LE16(data) != 19) {
 399                 wpa_printf(MSG_DEBUG, "SAE: Unsupported Finite Cyclic Group %u",
 400                            WPA_GET_LE16(data));
 401                 return -1;
 402         }
 403
 404         /* TODO */
 405
 406         return 0;
 407 }
 408
 409
 410 static int sme_sae_process_confirm(struct wpa_supplicant *wpa_s, const u8 *data,
 411                                    size_t len)
 412 {
 413         u16 rc;
 414
 415         if (len < 2)
 416                 return -1;
 417         rc = WPA_GET_LE16(data);
 418         wpa_printf(MSG_DEBUG, "SAE: peer-send-confirm %u", rc);
 419
 420         /* TODO */
 421         return 0;
 422 }
 423
 424
 425 static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
 426                         u16 status_code, const u8 *data, size_t len)
 427 {
 428         wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
 429                 "status code %u", auth_transaction, status_code);
 430         wpa_hexdump(MSG_DEBUG, "SME: SAE fields", data, len);
 431
 432         if (status_code != WLAN_STATUS_SUCCESS)
 433                 return -1;
 434
 435         if (auth_transaction == 1) {
 436                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
 437                 if (wpa_s->current_bss == NULL ||
 438                     wpa_s->current_ssid == NULL)
 439                         return -1;
 440                 if (wpa_s->sme.sae_state != SME_SAE_COMMIT)
 441                         return -1;
 442                 if (sme_sae_process_commit(wpa_s, data, len) < 0)
 443                         return -1;
 444                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 445                                         wpa_s->current_ssid, 0);
 446                 return 0;
 447         } else if (auth_transaction == 2) {
 448                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
 449                 if (wpa_s->sme.sae_state != SME_SAE_CONFIRM)
 450                         return -1;
 451                 if (sme_sae_process_confirm(wpa_s, data, len) < 0)
 452                         return -1;
 453                 return 1;
 454         }
 455
 456         return -1;
 457 }
 458 #endif /* CONFIG_SAE */
 459
 460
 461 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
 462 {
 463         struct wpa_ssid *ssid = wpa_s->current_ssid;
 464
 465         if (ssid == NULL) {
 466                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 467                         "when network is not selected");
 468                 return;
 469         }
 470
 471         if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
 472                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 473                         "when not in authenticating state");
 474                 return;
 475         }
 476
 477         if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
 478                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
 479                         "unexpected peer " MACSTR,
 480                         MAC2STR(data->auth.peer));
 481                 return;
 482         }
 483
 484         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
 485                 " auth_type=%d auth_transaction=%d status_code=%d",
 486                 MAC2STR(data->auth.peer), data->auth.auth_type,
 487                 data->auth.auth_transaction, data->auth.status_code);
 488         wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
 489                     data->auth.ies, data->auth.ies_len);
 490
 491         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 492
 493 #ifdef CONFIG_SAE
 494         if (data->auth.auth_type == WLAN_AUTH_SAE) {
 495                 int res;
 496                 res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
 497                                    data->auth.status_code, data->auth.ies,
 498                                    data->auth.ies_len);
 499                 if (res < 0) {
 500                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 501                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 502
 503                 }
 504                 if (res != 1)
 505                         return;
 506         }
 507 #endif /* CONFIG_SAE */
 508
 509         if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
 510                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
 511                         "code %d)", data->auth.status_code);
 512
 513                 if (data->auth.status_code !=
 514                     WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
 515                     wpa_s->sme.auth_alg == data->auth.auth_type ||
 516                     wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
 517                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 518                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 519                         return;
 520                 }
 521
 522                 switch (data->auth.auth_type) {
 523                 case WLAN_AUTH_OPEN:
 524                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 525
 526                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
 527                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 528                                                  wpa_s->current_ssid);
 529                         return;
 530
 531                 case WLAN_AUTH_SHARED_KEY:
 532                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
 533
 534                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
 535                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 536                                                  wpa_s->current_ssid);
 537                         return;
 538
 539                 default:
 540                         return;
 541                 }
 542         }
 543
 544 #ifdef CONFIG_IEEE80211R
 545         if (data->auth.auth_type == WLAN_AUTH_FT) {
 546                 union wpa_event_data edata;
 547                 os_memset(&edata, 0, sizeof(edata));
 548                 edata.ft_ies.ies = data->auth.ies;
 549                 edata.ft_ies.ies_len = data->auth.ies_len;
 550                 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
 551                 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
 552         }
 553 #endif /* CONFIG_IEEE80211R */
 554
 555         sme_associate(wpa_s, ssid->mode, data->auth.peer,
 556                       data->auth.auth_type);
 557 }
 558
 559
 560 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
 561                    const u8 *bssid, u16 auth_type)
 562 {
 563         struct wpa_driver_associate_params params;
 564         struct ieee802_11_elems elems;
 565 #ifdef CONFIG_HT_OVERRIDES
 566         struct ieee80211_ht_capabilities htcaps;
 567         struct ieee80211_ht_capabilities htcaps_mask;
 568 #endif /* CONFIG_HT_OVERRIDES */
 569
 570         os_memset(&params, 0, sizeof(params));
 571         params.bssid = bssid;
 572         params.ssid = wpa_s->sme.ssid;
 573         params.ssid_len = wpa_s->sme.ssid_len;
 574         params.freq = wpa_s->sme.freq;
 575         params.bg_scan_period = wpa_s->current_ssid ?
 576                 wpa_s->current_ssid->bg_scan_period : -1;
 577         params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
 578                 wpa_s->sme.assoc_req_ie : NULL;
 579         params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
 580         params.pairwise_suite = cipher_suite2driver(wpa_s->pairwise_cipher);
 581         params.group_suite = cipher_suite2driver(wpa_s->group_cipher);
 582 #ifdef CONFIG_HT_OVERRIDES
 583         os_memset(&htcaps, 0, sizeof(htcaps));
 584         os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
 585         params.htcaps = (u8 *) &htcaps;
 586         params.htcaps_mask = (u8 *) &htcaps_mask;
 587         wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, &params);
 588 #endif /* CONFIG_HT_OVERRIDES */
 589 #ifdef CONFIG_IEEE80211R
 590         if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
 591                 params.wpa_ie = wpa_s->sme.ft_ies;
 592                 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
 593         }
 594 #endif /* CONFIG_IEEE80211R */
 595         params.mode = mode;
 596         params.mgmt_frame_protection = wpa_s->sme.mfp;
 597         if (wpa_s->sme.prev_bssid_set)
 598                 params.prev_bssid = wpa_s->sme.prev_bssid;
 599
 600         wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
 601                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 602                 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
 603                 params.freq);
 604
 605         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
 606
 607         if (params.wpa_ie == NULL ||
 608             ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
 609             < 0) {
 610                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
 611                 os_memset(&elems, 0, sizeof(elems));
 612         }
 613         if (elems.rsn_ie) {
 614                 params.wpa_proto = WPA_PROTO_RSN;
 615                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
 616                                         elems.rsn_ie_len + 2);
 617         } else if (elems.wpa_ie) {
 618                 params.wpa_proto = WPA_PROTO_WPA;
 619                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
 620                                         elems.wpa_ie_len + 2);
 621         } else
 622                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 623         if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
 624                 params.p2p = 1;
 625
 626         if (wpa_s->parent->set_sta_uapsd)
 627                 params.uapsd = wpa_s->parent->sta_uapsd;
 628         else
 629                 params.uapsd = -1;
 630
 631         if (wpa_drv_associate(wpa_s, &params) < 0) {
 632                 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
 633                         "driver failed");
 634                 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 635                 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 636                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 637                 return;
 638         }
 639
 640         eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
 641                                NULL);
 642 }
 643
 644
 645 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
 646                       const u8 *ies, size_t ies_len)
 647 {
 648         if (md == NULL || ies == NULL) {
 649                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
 650                 os_free(wpa_s->sme.ft_ies);
 651                 wpa_s->sme.ft_ies = NULL;
 652                 wpa_s->sme.ft_ies_len = 0;
 653                 wpa_s->sme.ft_used = 0;
 654                 return 0;
 655         }
 656
 657         os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
 658         wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
 659         os_free(wpa_s->sme.ft_ies);
 660         wpa_s->sme.ft_ies = os_malloc(ies_len);
 661         if (wpa_s->sme.ft_ies == NULL)
 662                 return -1;
 663         os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
 664         wpa_s->sme.ft_ies_len = ies_len;
 665         return 0;
 666 }
 667
 668
 669 static void sme_deauth(struct wpa_supplicant *wpa_s)
 670 {
 671         int bssid_changed;
 672
 673         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 674
 675         if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
 676                                    WLAN_REASON_DEAUTH_LEAVING) < 0) {
 677                 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
 678                         "failed");
 679         }
 680         wpa_s->sme.prev_bssid_set = 0;
 681
 682         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 683         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 684         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 685         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 686         if (bssid_changed)
 687                 wpas_notify_bssid_changed(wpa_s);
 688 }
 689
 690
 691 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
 692                             union wpa_event_data *data)
 693 {
 694         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
 695                 "status code %d", MAC2STR(wpa_s->pending_bssid),
 696                 data->assoc_reject.status_code);
 697
 698         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 699
 700         /*
 701          * For now, unconditionally terminate the previous authentication. In
 702          * theory, this should not be needed, but mac80211 gets quite confused
 703          * if the authentication is left pending.. Some roaming cases might
 704          * benefit from using the previous authentication, so this could be
 705          * optimized in the future.
 706          */
 707         sme_deauth(wpa_s);
 708 }
 709
 710
 711 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
 712                               union wpa_event_data *data)
 713 {
 714         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
 715         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 716         wpa_supplicant_mark_disassoc(wpa_s);
 717 }
 718
 719
 720 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
 721                                union wpa_event_data *data)
 722 {
 723         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
 724         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 725         wpa_supplicant_mark_disassoc(wpa_s);
 726 }
 727
 728
 729 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
 730                         union wpa_event_data *data)
 731 {
 732         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
 733         if (wpa_s->sme.prev_bssid_set) {
 734                 /*
 735                  * cfg80211/mac80211 can get into somewhat confused state if
 736                  * the AP only disassociates us and leaves us in authenticated
 737                  * state. For now, force the state to be cleared to avoid
 738                  * confusing errors if we try to associate with the AP again.
 739                  */
 740                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
 741                         "driver state");
 742                 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
 743                                        WLAN_REASON_DEAUTH_LEAVING);
 744         }
 745 }
 746
 747
 748 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
 749 {
 750         struct wpa_supplicant *wpa_s = eloop_ctx;
 751         if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
 752                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
 753                 sme_deauth(wpa_s);
 754         }
 755 }
 756
 757
 758 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
 759 {
 760         struct wpa_supplicant *wpa_s = eloop_ctx;
 761         if (wpa_s->wpa_state == WPA_ASSOCIATING) {
 762                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
 763                 sme_deauth(wpa_s);
 764         }
 765 }
 766
 767
 768 void sme_state_changed(struct wpa_supplicant *wpa_s)
 769 {
 770         /* Make sure timers are cleaned up appropriately. */
 771         if (wpa_s->wpa_state != WPA_ASSOCIATING)
 772                 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 773         if (wpa_s->wpa_state != WPA_AUTHENTICATING)
 774                 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 775 }
 776
 777
 778 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
 779                                        const u8 *prev_pending_bssid)
 780 {
 781         /*
 782          * mac80211-workaround to force deauth on failed auth cmd,
 783          * requires us to remain in authenticating state to allow the
 784          * second authentication attempt to be continued properly.
 785          */
 786         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
 787                 "to proceed after disconnection event");
 788         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 789         os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
 790
 791         /*
 792          * Re-arm authentication timer in case auth fails for whatever reason.
 793          */
 794         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 795         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 796                                NULL);
 797 }
 798
 799
 800 void sme_deinit(struct wpa_supplicant *wpa_s)
 801 {
 802         os_free(wpa_s->sme.ft_ies);
 803         wpa_s->sme.ft_ies = NULL;
 804         wpa_s->sme.ft_ies_len = 0;
 805 #ifdef CONFIG_IEEE80211W
 806         sme_stop_sa_query(wpa_s);
 807 #endif /* CONFIG_IEEE80211W */
 808
 809         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 810         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 811         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
 812 }
 813
 814
 815 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
 816                                    const u8 *chan_list, u8 num_channels,
 817                                    u8 num_intol)
 818 {
 819         struct ieee80211_2040_bss_coex_ie *bc_ie;
 820         struct ieee80211_2040_intol_chan_report *ic_report;
 821         struct wpabuf *buf;
 822
 823         wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR,
 824                    MAC2STR(wpa_s->bssid));
 825
 826         buf = wpabuf_alloc(2 + /* action.category + action_code */
 827                            sizeof(struct ieee80211_2040_bss_coex_ie) +
 828                            sizeof(struct ieee80211_2040_intol_chan_report) +
 829                            num_channels);
 830         if (buf == NULL)
 831                 return;
 832
 833         wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
 834         wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
 835
 836         bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
 837         bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
 838         bc_ie->length = 1;
 839         if (num_intol)
 840                 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
 841
 842         if (num_channels > 0) {
 843                 ic_report = wpabuf_put(buf, sizeof(*ic_report));
 844                 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
 845                 ic_report->length = num_channels + 1;
 846                 ic_report->op_class = 0;
 847                 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
 848                           num_channels);
 849         }
 850
 851         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
 852                                 wpa_s->own_addr, wpa_s->bssid,
 853                                 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
 854                 wpa_msg(wpa_s, MSG_INFO,
 855                         "SME: Failed to send 20/40 BSS Coexistence frame");
 856         }
 857
 858         wpabuf_free(buf);
 859 }
 860
 861
 862 /**
 863  * enum wpas_band - Frequency band
 864  * @WPAS_BAND_2GHZ: 2.4 GHz ISM band
 865  * @WPAS_BAND_5GHZ: around 5 GHz band (4.9 - 5.7 GHz)
 866  */
 867 enum wpas_band {
 868         WPAS_BAND_2GHZ,
 869         WPAS_BAND_5GHZ,
 870         WPAS_BAND_INVALID
 871 };
 872
 873 /**
 874  * freq_to_channel - Convert frequency into channel info
 875  * @channel: Buffer for returning channel number
 876  * Returns: Band (2 or 5 GHz)
 877  */
 878 static enum wpas_band freq_to_channel(int freq, u8 *channel)
 879 {
 880         enum wpas_band band = (freq <= 2484) ? WPAS_BAND_2GHZ : WPAS_BAND_5GHZ;
 881         u8 chan = 0;
 882
 883         if (freq >= 2412 && freq <= 2472)
 884                 chan = (freq - 2407) / 5;
 885         else if (freq == 2484)
 886                 chan = 14;
 887         else if (freq >= 5180 && freq <= 5805)
 888                 chan = (freq - 5000) / 5;
 889
 890         *channel = chan;
 891         return band;
 892 }
 893
 894
 895 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
 896 {
 897         struct wpa_bss *bss;
 898         const u8 *ie;
 899         u16 ht_cap;
 900         u8 chan_list[P2P_MAX_CHANNELS], channel;
 901         u8 num_channels = 0, num_intol = 0, i;
 902
 903         if (!wpa_s->sme.sched_obss_scan)
 904                 return 0;
 905
 906         wpa_s->sme.sched_obss_scan = 0;
 907         if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
 908                 return 1;
 909
 910         /*
 911          * Check whether AP uses regulatory triplet or channel triplet in
 912          * country info. Right now the operating class of the BSS channel
 913          * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
 914          * based on the assumption that operating class triplet is not used in
 915          * beacon frame. If the First Channel Number/Operating Extension
 916          * Identifier octet has a positive integer value of 201 or greater,
 917          * then its operating class triplet.
 918          *
 919          * TODO: If Supported Operating Classes element is present in beacon
 920          * frame, have to lookup operating class in Annex E and fill them in
 921          * 2040 coex frame.
 922          */
 923         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
 924         if (ie && (ie[1] >= 6) && (ie[5] >= 201))
 925                 return 1;
 926
 927         os_memset(chan_list, 0, sizeof(chan_list));
 928
 929         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
 930                 /* Skip other band bss */
 931                 if (freq_to_channel(bss->freq, &channel) != WPAS_BAND_2GHZ)
 932                         continue;
 933
 934                 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
 935                 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
 936
 937                 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
 938                         /* Check whether the channel is already considered */
 939                         for (i = 0; i < num_channels; i++) {
 940                                 if (channel == chan_list[i])
 941                                         break;
 942                         }
 943                         if (i != num_channels)
 944                                 continue;
 945
 946                         if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
 947                                 num_intol++;
 948
 949                         chan_list[num_channels++] = channel;
 950                 }
 951         }
 952
 953         sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
 954         return 1;
 955 }
 956
 957
 958 static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
 959                                           u16 num_modes,
 960                                           enum hostapd_hw_mode mode)
 961 {
 962         u16 i;
 963
 964         for (i = 0; i < num_modes; i++) {
 965                 if (modes[i].mode == mode)
 966                         return &modes[i];
 967         }
 968
 969         return NULL;
 970 }
 971
 972
 973 static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s,
 974                                         enum hostapd_hw_mode band,
 975                                         struct wpa_driver_scan_params *params)
 976 {
 977         /* Include only supported channels for the specified band */
 978         struct hostapd_hw_modes *mode;
 979         int count, i;
 980
 981         mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band);
 982         if (mode == NULL) {
 983                 /* No channels supported in this band - use empty list */
 984                 params->freqs = os_zalloc(sizeof(int));
 985                 return;
 986         }
 987
 988         params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
 989         if (params->freqs == NULL)
 990                 return;
 991         for (count = 0, i = 0; i < mode->num_channels; i++) {
 992                 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
 993                         continue;
 994                 params->freqs[count++] = mode->channels[i].freq;
 995         }
 996 }
 997
 998
 999 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1000 {
1001         struct wpa_supplicant *wpa_s = eloop_ctx;
1002         struct wpa_driver_scan_params params;
1003
1004         if (!wpa_s->current_bss) {
1005                 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
1006                 return;
1007         }
1008
1009         os_memset(&params, 0, sizeof(params));
1010         wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G, &params);
1011         wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
1012
1013         if (wpa_supplicant_trigger_scan(wpa_s, &params))
1014                 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
1015         else
1016                 wpa_s->sme.sched_obss_scan = 1;
1017         os_free(params.freqs);
1018
1019         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1020                                sme_obss_scan_timeout, wpa_s, NULL);
1021 }
1022
1023
1024 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
1025 {
1026         const u8 *ie;
1027         struct wpa_bss *bss = wpa_s->current_bss;
1028         struct wpa_ssid *ssid = wpa_s->current_ssid;
1029         struct hostapd_hw_modes *hw_mode = NULL;
1030         int i;
1031
1032         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1033         wpa_s->sme.sched_obss_scan = 0;
1034         if (!enable)
1035                 return;
1036
1037         /*
1038          * Schedule OBSS scan if driver is using station SME in wpa_supplicant
1039          * or it expects OBSS scan to be performed by wpa_supplicant.
1040          */
1041         if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
1042               (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
1043             ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
1044                 return;
1045
1046         if (!wpa_s->hw.modes)
1047                 return;
1048
1049         /* only HT caps in 11g mode are relevant */
1050         for (i = 0; i < wpa_s->hw.num_modes; i++) {
1051                 hw_mode = &wpa_s->hw.modes[i];
1052                 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
1053                         break;
1054         }
1055
1056         /* Driver does not support HT40 for 11g or doesn't have 11g. */
1057         if (i == wpa_s->hw.num_modes || !hw_mode ||
1058             !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1059                 return;
1060
1061         if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
1062                 return; /* Not associated on 2.4 GHz band */
1063
1064         /* Check whether AP supports HT40 */
1065         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
1066         if (!ie || ie[1] < 2 ||
1067             !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1068                 return; /* AP does not support HT40 */
1069
1070         ie = wpa_bss_get_ie(wpa_s->current_bss,
1071                             WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
1072         if (!ie || ie[1] < 14)
1073                 return; /* AP does not request OBSS scans */
1074
1075         wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
1076         if (wpa_s->sme.obss_scan_int < 10) {
1077                 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
1078                            "replaced with the minimum 10 sec",
1079                            wpa_s->sme.obss_scan_int);
1080                 wpa_s->sme.obss_scan_int = 10;
1081         }
1082         wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
1083                    wpa_s->sme.obss_scan_int);
1084         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1085                                sme_obss_scan_timeout, wpa_s, NULL);
1086 }
1087
1088
1089 #ifdef CONFIG_IEEE80211W
1090
1091 static const unsigned int sa_query_max_timeout = 1000;
1092 static const unsigned int sa_query_retry_timeout = 201;
1093
1094 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
1095 {
1096         u32 tu;
1097         struct os_time now, passed;
1098         os_get_time(&now);
1099         os_time_sub(&now, &wpa_s->sme.sa_query_start, &passed);
1100         tu = (passed.sec * 1000000 + passed.usec) / 1024;
1101         if (sa_query_max_timeout < tu) {
1102                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
1103                 sme_stop_sa_query(wpa_s);
1104                 wpa_supplicant_deauthenticate(
1105                         wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
1106                 return 1;
1107         }
1108
1109         return 0;
1110 }
1111
1112
1113 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
1114                                   const u8 *trans_id)
1115 {
1116         u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
1117         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
1118                 MACSTR, MAC2STR(wpa_s->bssid));
1119         wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
1120                     trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1121         req[0] = WLAN_ACTION_SA_QUERY;
1122         req[1] = WLAN_SA_QUERY_REQUEST;
1123         os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1124         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1125                                 wpa_s->own_addr, wpa_s->bssid,
1126                                 req, sizeof(req), 0) < 0)
1127                 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
1128                         "Request");
1129 }
1130
1131
1132 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
1133 {
1134         struct wpa_supplicant *wpa_s = eloop_ctx;
1135         unsigned int timeout, sec, usec;
1136         u8 *trans_id, *nbuf;
1137
1138         if (wpa_s->sme.sa_query_count > 0 &&
1139             sme_check_sa_query_timeout(wpa_s))
1140                 return;
1141
1142         nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
1143                                 wpa_s->sme.sa_query_count + 1,
1144                                 WLAN_SA_QUERY_TR_ID_LEN);
1145         if (nbuf == NULL)
1146                 return;
1147         if (wpa_s->sme.sa_query_count == 0) {
1148                 /* Starting a new SA Query procedure */
1149                 os_get_time(&wpa_s->sme.sa_query_start);
1150         }
1151         trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
1152         wpa_s->sme.sa_query_trans_id = nbuf;
1153         wpa_s->sme.sa_query_count++;
1154
1155         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1156
1157         timeout = sa_query_retry_timeout;
1158         sec = ((timeout / 1000) * 1024) / 1000;
1159         usec = (timeout % 1000) * 1024;
1160         eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
1161
1162         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
1163                 wpa_s->sme.sa_query_count);
1164
1165         sme_send_sa_query_req(wpa_s, trans_id);
1166 }
1167
1168
1169 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
1170 {
1171         sme_sa_query_timer(wpa_s, NULL);
1172 }
1173
1174
1175 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
1176 {
1177         eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
1178         os_free(wpa_s->sme.sa_query_trans_id);
1179         wpa_s->sme.sa_query_trans_id = NULL;
1180         wpa_s->sme.sa_query_count = 0;
1181 }
1182
1183
1184 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1185                                  const u8 *da, u16 reason_code)
1186 {
1187         struct wpa_ssid *ssid;
1188
1189         if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME))
1190                 return;
1191         if (wpa_s->wpa_state != WPA_COMPLETED)
1192                 return;
1193         ssid = wpa_s->current_ssid;
1194         if (ssid == NULL ||
1195             (ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
1196              wpa_s->conf->pmf : ssid->ieee80211w) == NO_MGMT_FRAME_PROTECTION)
1197                 return;
1198         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1199                 return;
1200         if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1201             reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1202                 return;
1203         if (wpa_s->sme.sa_query_count > 0)
1204                 return;
1205
1206         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1207                 "possible AP/STA state mismatch - trigger SA Query");
1208         sme_start_sa_query(wpa_s);
1209 }
1210
1211
1212 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1213                      const u8 *data, size_t len)
1214 {
1215         int i;
1216
1217         if (wpa_s->sme.sa_query_trans_id == NULL ||
1218             len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1219             data[0] != WLAN_SA_QUERY_RESPONSE)
1220                 return;
1221         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1222                 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1223
1224         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1225                 return;
1226
1227         for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1228                 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1229                               i * WLAN_SA_QUERY_TR_ID_LEN,
1230                               data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1231                         break;
1232         }
1233
1234         if (i >= wpa_s->sme.sa_query_count) {
1235                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1236                         "transaction identifier found");
1237                 return;
1238         }
1239
1240         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1241                 "from " MACSTR, MAC2STR(sa));
1242         sme_stop_sa_query(wpa_s);
1243 }
1244
1245 #endif /* CONFIG_IEEE80211W */