wpa_supplicant/sme.c

   1 /*
   2  * wpa_supplicant - SME
   3  * Copyright (c) 2009-2014, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "includes.h"
  10
  11 #include "common.h"
  12 #include "utils/eloop.h"
  13 #include "common/ieee802_11_defs.h"
  14 #include "common/ieee802_11_common.h"
  15 #include "eapol_supp/eapol_supp_sm.h"
  16 #include "common/wpa_common.h"
  17 #include "common/sae.h"
  18 #include "rsn_supp/wpa.h"
  19 #include "rsn_supp/pmksa_cache.h"
  20 #include "config.h"
  21 #include "wpa_supplicant_i.h"
  22 #include "driver_i.h"
  23 #include "wpas_glue.h"
  24 #include "wps_supplicant.h"
  25 #include "p2p_supplicant.h"
  26 #include "notify.h"
  27 #include "bss.h"
  28 #include "scan.h"
  29 #include "sme.h"
  30 #include "hs20_supplicant.h"
  31
  32 #define SME_AUTH_TIMEOUT 5
  33 #define SME_ASSOC_TIMEOUT 5
  34
  35 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx);
  36 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx);
  37 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx);
  38 #ifdef CONFIG_IEEE80211W
  39 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s);
  40 #endif /* CONFIG_IEEE80211W */
  41
  42
  43 #ifdef CONFIG_SAE
  44
  45 static int index_within_array(const int *array, int idx)
  46 {
  47         int i;
  48         for (i = 0; i < idx; i++) {
  49                 if (array[i] <= 0)
  50                         return 0;
  51         }
  52         return 1;
  53 }
  54
  55
  56 static int sme_set_sae_group(struct wpa_supplicant *wpa_s)
  57 {
  58         int *groups = wpa_s->conf->sae_groups;
  59         int default_groups[] = { 19, 20, 21, 25, 26, 0 };
  60
  61         if (!groups || groups[0] <= 0)
  62                 groups = default_groups;
  63
  64         /* Configuration may have changed, so validate current index */
  65         if (!index_within_array(groups, wpa_s->sme.sae_group_index))
  66                 return -1;
  67
  68         for (;;) {
  69                 int group = groups[wpa_s->sme.sae_group_index];
  70                 if (group < 0)
  71                         break;
  72                 if (sae_set_group(&wpa_s->sme.sae, group) == 0) {
  73                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected SAE group %d",
  74                                 wpa_s->sme.sae.group);
  75                        return 0;
  76                 }
  77                 wpa_s->sme.sae_group_index++;
  78         }
  79
  80         return -1;
  81 }
  82
  83
  84 static struct wpabuf * sme_auth_build_sae_commit(struct wpa_supplicant *wpa_s,
  85                                                  struct wpa_ssid *ssid,
  86                                                  const u8 *bssid)
  87 {
  88         struct wpabuf *buf;
  89         size_t len;
  90
  91         if (ssid->passphrase == NULL) {
  92                 wpa_printf(MSG_DEBUG, "SAE: No password available");
  93                 return NULL;
  94         }
  95
  96         if (sme_set_sae_group(wpa_s) < 0) {
  97                 wpa_printf(MSG_DEBUG, "SAE: Failed to select group");
  98                 return NULL;
  99         }
 100
 101         if (sae_prepare_commit(wpa_s->own_addr, bssid,
 102                                (u8 *) ssid->passphrase,
 103                                os_strlen(ssid->passphrase),
 104                                &wpa_s->sme.sae) < 0) {
 105                 wpa_printf(MSG_DEBUG, "SAE: Could not pick PWE");
 106                 return NULL;
 107         }
 108
 109         len = wpa_s->sme.sae_token ? wpabuf_len(wpa_s->sme.sae_token) : 0;
 110         buf = wpabuf_alloc(4 + SAE_COMMIT_MAX_LEN + len);
 111         if (buf == NULL)
 112                 return NULL;
 113
 114         wpabuf_put_le16(buf, 1); /* Transaction seq# */
 115         wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
 116         sae_write_commit(&wpa_s->sme.sae, buf, wpa_s->sme.sae_token);
 117
 118         return buf;
 119 }
 120
 121
 122 static struct wpabuf * sme_auth_build_sae_confirm(struct wpa_supplicant *wpa_s)
 123 {
 124         struct wpabuf *buf;
 125
 126         buf = wpabuf_alloc(4 + SAE_CONFIRM_MAX_LEN);
 127         if (buf == NULL)
 128                 return NULL;
 129
 130         wpabuf_put_le16(buf, 2); /* Transaction seq# */
 131         wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
 132         sae_write_confirm(&wpa_s->sme.sae, buf);
 133
 134         return buf;
 135 }
 136
 137 #endif /* CONFIG_SAE */
 138
 139
 140 static void sme_send_authentication(struct wpa_supplicant *wpa_s,
 141                                     struct wpa_bss *bss, struct wpa_ssid *ssid,
 142                                     int start)
 143 {
 144         struct wpa_driver_auth_params params;
 145         struct wpa_ssid *old_ssid;
 146 #ifdef CONFIG_IEEE80211R
 147         const u8 *ie;
 148 #endif /* CONFIG_IEEE80211R */
 149 #ifdef CONFIG_IEEE80211R
 150         const u8 *md = NULL;
 151 #endif /* CONFIG_IEEE80211R */
 152         int i, bssid_changed;
 153         struct wpabuf *resp = NULL;
 154         u8 ext_capab[10];
 155         int ext_capab_len;
 156
 157         if (bss == NULL) {
 158                 wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for "
 159                         "the network");
 160                 wpas_connect_work_done(wpa_s);
 161                 return;
 162         }
 163
 164         wpa_s->current_bss = bss;
 165
 166         os_memset(&params, 0, sizeof(params));
 167         wpa_s->reassociate = 0;
 168
 169         params.freq = bss->freq;
 170         params.bssid = bss->bssid;
 171         params.ssid = bss->ssid;
 172         params.ssid_len = bss->ssid_len;
 173         params.p2p = ssid->p2p_group;
 174
 175         if (wpa_s->sme.ssid_len != params.ssid_len ||
 176             os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
 177                 wpa_s->sme.prev_bssid_set = 0;
 178
 179         wpa_s->sme.freq = params.freq;
 180         os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
 181         wpa_s->sme.ssid_len = params.ssid_len;
 182
 183         params.auth_alg = WPA_AUTH_ALG_OPEN;
 184 #ifdef IEEE8021X_EAPOL
 185         if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
 186                 if (ssid->leap) {
 187                         if (ssid->non_leap == 0)
 188                                 params.auth_alg = WPA_AUTH_ALG_LEAP;
 189                         else
 190                                 params.auth_alg |= WPA_AUTH_ALG_LEAP;
 191                 }
 192         }
 193 #endif /* IEEE8021X_EAPOL */
 194         wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
 195                 params.auth_alg);
 196         if (ssid->auth_alg) {
 197                 params.auth_alg = ssid->auth_alg;
 198                 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
 199                         "0x%x", params.auth_alg);
 200         }
 201 #ifdef CONFIG_SAE
 202         if (wpa_key_mgmt_sae(ssid->key_mgmt)) {
 203                 const u8 *rsn;
 204                 struct wpa_ie_data ied;
 205
 206                 rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 207                 if (rsn &&
 208                     wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0) {
 209                         if (wpa_key_mgmt_sae(ied.key_mgmt)) {
 210                                 wpa_dbg(wpa_s, MSG_DEBUG, "Using SAE auth_alg");
 211                                 params.auth_alg = WPA_AUTH_ALG_SAE;
 212                         }
 213                 }
 214         }
 215 #endif /* CONFIG_SAE */
 216
 217         for (i = 0; i < NUM_WEP_KEYS; i++) {
 218                 if (ssid->wep_key_len[i])
 219                         params.wep_key[i] = ssid->wep_key[i];
 220                 params.wep_key_len[i] = ssid->wep_key_len[i];
 221         }
 222         params.wep_tx_keyidx = ssid->wep_tx_keyidx;
 223
 224         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 225         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 226         os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
 227         if (bssid_changed)
 228                 wpas_notify_bssid_changed(wpa_s);
 229
 230         if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
 231              wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
 232             wpa_key_mgmt_wpa(ssid->key_mgmt)) {
 233                 int try_opportunistic;
 234                 try_opportunistic = (ssid->proactive_key_caching < 0 ?
 235                                      wpa_s->conf->okc :
 236                                      ssid->proactive_key_caching) &&
 237                         (ssid->proto & WPA_PROTO_RSN);
 238                 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
 239                                             wpa_s->current_ssid,
 240                                             try_opportunistic) == 0)
 241                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
 242                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 243                 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
 244                                               wpa_s->sme.assoc_req_ie,
 245                                               &wpa_s->sme.assoc_req_ie_len)) {
 246                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 247                                 "key management and encryption suites");
 248                         wpas_connect_work_done(wpa_s);
 249                         return;
 250                 }
 251         } else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
 252                    wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) {
 253                 /*
 254                  * Both WPA and non-WPA IEEE 802.1X enabled in configuration -
 255                  * use non-WPA since the scan results did not indicate that the
 256                  * AP is using WPA or WPA2.
 257                  */
 258                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 259                 wpa_s->sme.assoc_req_ie_len = 0;
 260         } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
 261                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 262                 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
 263                                               wpa_s->sme.assoc_req_ie,
 264                                               &wpa_s->sme.assoc_req_ie_len)) {
 265                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 266                                 "key management and encryption suites (no "
 267                                 "scan results)");
 268                         wpas_connect_work_done(wpa_s);
 269                         return;
 270                 }
 271 #ifdef CONFIG_WPS
 272         } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 273                 struct wpabuf *wps_ie;
 274                 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
 275                 if (wps_ie && wpabuf_len(wps_ie) <=
 276                     sizeof(wpa_s->sme.assoc_req_ie)) {
 277                         wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
 278                         os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
 279                                   wpa_s->sme.assoc_req_ie_len);
 280                 } else
 281                         wpa_s->sme.assoc_req_ie_len = 0;
 282                 wpabuf_free(wps_ie);
 283                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 284 #endif /* CONFIG_WPS */
 285         } else {
 286                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 287                 wpa_s->sme.assoc_req_ie_len = 0;
 288         }
 289
 290 #ifdef CONFIG_IEEE80211R
 291         ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
 292         if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
 293                 md = ie + 2;
 294         wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
 295         if (md) {
 296                 /* Prepare for the next transition */
 297                 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
 298         }
 299
 300         if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) {
 301                 if (wpa_s->sme.assoc_req_ie_len + 5 <
 302                     sizeof(wpa_s->sme.assoc_req_ie)) {
 303                         struct rsn_mdie *mdie;
 304                         u8 *pos = wpa_s->sme.assoc_req_ie +
 305                                 wpa_s->sme.assoc_req_ie_len;
 306                         *pos++ = WLAN_EID_MOBILITY_DOMAIN;
 307                         *pos++ = sizeof(*mdie);
 308                         mdie = (struct rsn_mdie *) pos;
 309                         os_memcpy(mdie->mobility_domain, md,
 310                                   MOBILITY_DOMAIN_ID_LEN);
 311                         mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
 312                         wpa_s->sme.assoc_req_ie_len += 5;
 313                 }
 314
 315                 if (wpa_s->sme.ft_used &&
 316                     os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
 317                     wpa_sm_has_ptk(wpa_s->wpa)) {
 318                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT "
 319                                 "over-the-air");
 320                         params.auth_alg = WPA_AUTH_ALG_FT;
 321                         params.ie = wpa_s->sme.ft_ies;
 322                         params.ie_len = wpa_s->sme.ft_ies_len;
 323                 }
 324         }
 325 #endif /* CONFIG_IEEE80211R */
 326
 327 #ifdef CONFIG_IEEE80211W
 328         wpa_s->sme.mfp = ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
 329                 wpa_s->conf->pmf : ssid->ieee80211w;
 330         if (wpa_s->sme.mfp != NO_MGMT_FRAME_PROTECTION) {
 331                 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 332                 struct wpa_ie_data _ie;
 333                 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
 334                     _ie.capabilities &
 335                     (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
 336                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
 337                                 "MFP: require MFP");
 338                         wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
 339                 }
 340         }
 341 #endif /* CONFIG_IEEE80211W */
 342
 343 #ifdef CONFIG_P2P
 344         if (wpa_s->global->p2p) {
 345                 u8 *pos;
 346                 size_t len;
 347                 int res;
 348                 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
 349                 len = sizeof(wpa_s->sme.assoc_req_ie) -
 350                         wpa_s->sme.assoc_req_ie_len;
 351                 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
 352                                             ssid->p2p_group);
 353                 if (res >= 0)
 354                         wpa_s->sme.assoc_req_ie_len += res;
 355         }
 356 #endif /* CONFIG_P2P */
 357
 358 #ifdef CONFIG_HS20
 359         if (is_hs20_network(wpa_s, ssid, bss)) {
 360                 struct wpabuf *hs20;
 361                 hs20 = wpabuf_alloc(20);
 362                 if (hs20) {
 363                         wpas_hs20_add_indication(hs20);
 364                         os_memcpy(wpa_s->sme.assoc_req_ie +
 365                                   wpa_s->sme.assoc_req_ie_len,
 366                                   wpabuf_head(hs20), wpabuf_len(hs20));
 367                         wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
 368                         wpabuf_free(hs20);
 369                 }
 370         }
 371 #endif /* CONFIG_HS20 */
 372
 373         ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab);
 374         if (ext_capab_len > 0) {
 375                 u8 *pos = wpa_s->sme.assoc_req_ie;
 376                 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
 377                         pos += 2 + pos[1];
 378                 os_memmove(pos + ext_capab_len, pos,
 379                            wpa_s->sme.assoc_req_ie_len -
 380                            (pos - wpa_s->sme.assoc_req_ie));
 381                 wpa_s->sme.assoc_req_ie_len += ext_capab_len;
 382                 os_memcpy(pos, ext_capab, ext_capab_len);
 383         }
 384
 385 #ifdef CONFIG_SAE
 386         if (params.auth_alg == WPA_AUTH_ALG_SAE) {
 387                 if (start)
 388                         resp = sme_auth_build_sae_commit(wpa_s, ssid,
 389                                                          bss->bssid);
 390                 else
 391                         resp = sme_auth_build_sae_confirm(wpa_s);
 392                 if (resp == NULL) {
 393                         wpas_connect_work_done(wpa_s);
 394                         return;
 395                 }
 396                 params.sae_data = wpabuf_head(resp);
 397                 params.sae_data_len = wpabuf_len(resp);
 398                 wpa_s->sme.sae.state = start ? SAE_COMMITTED : SAE_CONFIRMED;
 399         }
 400 #endif /* CONFIG_SAE */
 401
 402         wpa_supplicant_cancel_sched_scan(wpa_s);
 403         wpa_supplicant_cancel_scan(wpa_s);
 404
 405         wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
 406                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 407                 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
 408
 409         wpa_clear_keys(wpa_s, bss->bssid);
 410         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 411         old_ssid = wpa_s->current_ssid;
 412         wpa_s->current_ssid = ssid;
 413         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
 414         wpa_supplicant_initiate_eapol(wpa_s);
 415         if (old_ssid != wpa_s->current_ssid)
 416                 wpas_notify_network_changed(wpa_s);
 417
 418         wpa_s->sme.auth_alg = params.auth_alg;
 419         if (wpa_drv_authenticate(wpa_s, &params) < 0) {
 420                 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
 421                         "driver failed");
 422                 wpas_connection_failed(wpa_s, bss->bssid);
 423                 wpa_supplicant_mark_disassoc(wpa_s);
 424                 wpabuf_free(resp);
 425                 wpas_connect_work_done(wpa_s);
 426                 return;
 427         }
 428
 429         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 430                                NULL);
 431
 432         /*
 433          * Association will be started based on the authentication event from
 434          * the driver.
 435          */
 436
 437         wpabuf_free(resp);
 438 }
 439
 440
 441 static void sme_auth_start_cb(struct wpa_radio_work *work, int deinit)
 442 {
 443         struct wpa_connect_work *cwork = work->ctx;
 444         struct wpa_supplicant *wpa_s = work->wpa_s;
 445
 446         if (deinit) {
 447                 if (work->started)
 448                         wpa_s->connect_work = NULL;
 449
 450                 wpas_connect_work_free(cwork);
 451                 return;
 452         }
 453
 454         wpa_s->connect_work = work;
 455
 456         if (!wpas_valid_bss_ssid(wpa_s, cwork->bss, cwork->ssid)) {
 457                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: BSS/SSID entry for authentication not valid anymore - drop connection attempt");
 458                 wpas_connect_work_done(wpa_s);
 459                 return;
 460         }
 461
 462         sme_send_authentication(wpa_s, cwork->bss, cwork->ssid, 1);
 463 }
 464
 465
 466 void sme_authenticate(struct wpa_supplicant *wpa_s,
 467                       struct wpa_bss *bss, struct wpa_ssid *ssid)
 468 {
 469         struct wpa_connect_work *cwork;
 470
 471         if (bss == NULL || ssid == NULL)
 472                 return;
 473         if (wpa_s->connect_work) {
 474                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reject sme_authenticate() call since connect_work exist");
 475                 return;
 476         }
 477
 478         cwork = os_zalloc(sizeof(*cwork));
 479         if (cwork == NULL)
 480                 return;
 481         cwork->bss = bss;
 482         cwork->ssid = ssid;
 483         cwork->sme = 1;
 484
 485 #ifdef CONFIG_SAE
 486         wpa_s->sme.sae.state = SAE_NOTHING;
 487         wpa_s->sme.sae.send_confirm = 0;
 488         wpa_s->sme.sae_group_index = 0;
 489 #endif /* CONFIG_SAE */
 490
 491         if (radio_add_work(wpa_s, bss->freq, "sme-connect", 1,
 492                            sme_auth_start_cb, cwork) < 0)
 493                 wpas_connect_work_free(cwork);
 494 }
 495
 496
 497 #ifdef CONFIG_SAE
 498
 499 static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
 500                         u16 status_code, const u8 *data, size_t len)
 501 {
 502         wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
 503                 "status code %u", auth_transaction, status_code);
 504
 505         if (auth_transaction == 1 &&
 506             status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
 507             wpa_s->sme.sae.state == SAE_COMMITTED &&
 508             wpa_s->current_bss && wpa_s->current_ssid) {
 509                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE anti-clogging token "
 510                         "requested");
 511                 wpabuf_free(wpa_s->sme.sae_token);
 512                 wpa_s->sme.sae_token = wpabuf_alloc_copy(data, len);
 513                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 514                                         wpa_s->current_ssid, 1);
 515                 return 0;
 516         }
 517
 518         if (auth_transaction == 1 &&
 519             status_code == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED &&
 520             wpa_s->sme.sae.state == SAE_COMMITTED &&
 521             wpa_s->current_bss && wpa_s->current_ssid) {
 522                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE group not supported");
 523                 wpa_s->sme.sae_group_index++;
 524                 if (sme_set_sae_group(wpa_s) < 0)
 525                         return -1; /* no other groups enabled */
 526                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Try next enabled SAE group");
 527                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 528                                         wpa_s->current_ssid, 1);
 529                 return 0;
 530         }
 531
 532         if (status_code != WLAN_STATUS_SUCCESS)
 533                 return -1;
 534
 535         if (auth_transaction == 1) {
 536                 int *groups = wpa_s->conf->sae_groups;
 537
 538                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
 539                 if (wpa_s->current_bss == NULL ||
 540                     wpa_s->current_ssid == NULL)
 541                         return -1;
 542                 if (wpa_s->sme.sae.state != SAE_COMMITTED)
 543                         return -1;
 544                 if (groups && groups[0] <= 0)
 545                         groups = NULL;
 546                 if (sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL,
 547                                      groups) != WLAN_STATUS_SUCCESS)
 548                         return -1;
 549
 550                 if (sae_process_commit(&wpa_s->sme.sae) < 0) {
 551                         wpa_printf(MSG_DEBUG, "SAE: Failed to process peer "
 552                                    "commit");
 553                         return -1;
 554                 }
 555
 556                 wpabuf_free(wpa_s->sme.sae_token);
 557                 wpa_s->sme.sae_token = NULL;
 558                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 559                                         wpa_s->current_ssid, 0);
 560                 return 0;
 561         } else if (auth_transaction == 2) {
 562                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
 563                 if (wpa_s->sme.sae.state != SAE_CONFIRMED)
 564                         return -1;
 565                 if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0)
 566                         return -1;
 567                 wpa_s->sme.sae.state = SAE_ACCEPTED;
 568                 sae_clear_temp_data(&wpa_s->sme.sae);
 569                 return 1;
 570         }
 571
 572         return -1;
 573 }
 574 #endif /* CONFIG_SAE */
 575
 576
 577 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
 578 {
 579         struct wpa_ssid *ssid = wpa_s->current_ssid;
 580
 581         if (ssid == NULL) {
 582                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 583                         "when network is not selected");
 584                 return;
 585         }
 586
 587         if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
 588                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 589                         "when not in authenticating state");
 590                 return;
 591         }
 592
 593         if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
 594                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
 595                         "unexpected peer " MACSTR,
 596                         MAC2STR(data->auth.peer));
 597                 return;
 598         }
 599
 600         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
 601                 " auth_type=%d auth_transaction=%d status_code=%d",
 602                 MAC2STR(data->auth.peer), data->auth.auth_type,
 603                 data->auth.auth_transaction, data->auth.status_code);
 604         wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
 605                     data->auth.ies, data->auth.ies_len);
 606
 607         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 608
 609 #ifdef CONFIG_SAE
 610         if (data->auth.auth_type == WLAN_AUTH_SAE) {
 611                 int res;
 612                 res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
 613                                    data->auth.status_code, data->auth.ies,
 614                                    data->auth.ies_len);
 615                 if (res < 0) {
 616                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 617                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 618
 619                 }
 620                 if (res != 1)
 621                         return;
 622
 623                 wpa_printf(MSG_DEBUG, "SME: SAE completed - setting PMK for "
 624                            "4-way handshake");
 625                 wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN);
 626         }
 627 #endif /* CONFIG_SAE */
 628
 629         if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
 630                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
 631                         "code %d)", data->auth.status_code);
 632
 633                 if (data->auth.status_code !=
 634                     WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
 635                     wpa_s->sme.auth_alg == data->auth.auth_type ||
 636                     wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
 637                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 638                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 639                         return;
 640                 }
 641
 642                 wpas_connect_work_done(wpa_s);
 643
 644                 switch (data->auth.auth_type) {
 645                 case WLAN_AUTH_OPEN:
 646                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 647
 648                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
 649                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 650                                                  wpa_s->current_ssid);
 651                         return;
 652
 653                 case WLAN_AUTH_SHARED_KEY:
 654                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
 655
 656                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
 657                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 658                                                  wpa_s->current_ssid);
 659                         return;
 660
 661                 default:
 662                         return;
 663                 }
 664         }
 665
 666 #ifdef CONFIG_IEEE80211R
 667         if (data->auth.auth_type == WLAN_AUTH_FT) {
 668                 union wpa_event_data edata;
 669                 os_memset(&edata, 0, sizeof(edata));
 670                 edata.ft_ies.ies = data->auth.ies;
 671                 edata.ft_ies.ies_len = data->auth.ies_len;
 672                 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
 673                 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
 674         }
 675 #endif /* CONFIG_IEEE80211R */
 676
 677         sme_associate(wpa_s, ssid->mode, data->auth.peer,
 678                       data->auth.auth_type);
 679 }
 680
 681
 682 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
 683                    const u8 *bssid, u16 auth_type)
 684 {
 685         struct wpa_driver_associate_params params;
 686         struct ieee802_11_elems elems;
 687 #ifdef CONFIG_HT_OVERRIDES
 688         struct ieee80211_ht_capabilities htcaps;
 689         struct ieee80211_ht_capabilities htcaps_mask;
 690 #endif /* CONFIG_HT_OVERRIDES */
 691 #ifdef CONFIG_VHT_OVERRIDES
 692         struct ieee80211_vht_capabilities vhtcaps;
 693         struct ieee80211_vht_capabilities vhtcaps_mask;
 694 #endif /* CONFIG_VHT_OVERRIDES */
 695
 696         os_memset(&params, 0, sizeof(params));
 697         params.bssid = bssid;
 698         params.ssid = wpa_s->sme.ssid;
 699         params.ssid_len = wpa_s->sme.ssid_len;
 700         params.freq = wpa_s->sme.freq;
 701         params.bg_scan_period = wpa_s->current_ssid ?
 702                 wpa_s->current_ssid->bg_scan_period : -1;
 703         params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
 704                 wpa_s->sme.assoc_req_ie : NULL;
 705         params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
 706         params.pairwise_suite = wpa_s->pairwise_cipher;
 707         params.group_suite = wpa_s->group_cipher;
 708 #ifdef CONFIG_HT_OVERRIDES
 709         os_memset(&htcaps, 0, sizeof(htcaps));
 710         os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
 711         params.htcaps = (u8 *) &htcaps;
 712         params.htcaps_mask = (u8 *) &htcaps_mask;
 713         wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, &params);
 714 #endif /* CONFIG_HT_OVERRIDES */
 715 #ifdef CONFIG_VHT_OVERRIDES
 716         os_memset(&vhtcaps, 0, sizeof(vhtcaps));
 717         os_memset(&vhtcaps_mask, 0, sizeof(vhtcaps_mask));
 718         params.vhtcaps = &vhtcaps;
 719         params.vhtcaps_mask = &vhtcaps_mask;
 720         wpa_supplicant_apply_vht_overrides(wpa_s, wpa_s->current_ssid, &params);
 721 #endif /* CONFIG_VHT_OVERRIDES */
 722 #ifdef CONFIG_IEEE80211R
 723         if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
 724                 params.wpa_ie = wpa_s->sme.ft_ies;
 725                 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
 726         }
 727 #endif /* CONFIG_IEEE80211R */
 728         params.mode = mode;
 729         params.mgmt_frame_protection = wpa_s->sme.mfp;
 730         if (wpa_s->sme.prev_bssid_set)
 731                 params.prev_bssid = wpa_s->sme.prev_bssid;
 732
 733         wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
 734                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 735                 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
 736                 params.freq);
 737
 738         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
 739
 740         if (params.wpa_ie == NULL ||
 741             ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
 742             < 0) {
 743                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
 744                 os_memset(&elems, 0, sizeof(elems));
 745         }
 746         if (elems.rsn_ie) {
 747                 params.wpa_proto = WPA_PROTO_RSN;
 748                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
 749                                         elems.rsn_ie_len + 2);
 750         } else if (elems.wpa_ie) {
 751                 params.wpa_proto = WPA_PROTO_WPA;
 752                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
 753                                         elems.wpa_ie_len + 2);
 754         } else
 755                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 756         if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
 757                 params.p2p = 1;
 758
 759         if (wpa_s->parent->set_sta_uapsd)
 760                 params.uapsd = wpa_s->parent->sta_uapsd;
 761         else
 762                 params.uapsd = -1;
 763
 764         if (wpa_drv_associate(wpa_s, &params) < 0) {
 765                 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
 766                         "driver failed");
 767                 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 768                 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 769                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 770                 return;
 771         }
 772
 773         eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
 774                                NULL);
 775 }
 776
 777
 778 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
 779                       const u8 *ies, size_t ies_len)
 780 {
 781         if (md == NULL || ies == NULL) {
 782                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
 783                 os_free(wpa_s->sme.ft_ies);
 784                 wpa_s->sme.ft_ies = NULL;
 785                 wpa_s->sme.ft_ies_len = 0;
 786                 wpa_s->sme.ft_used = 0;
 787                 return 0;
 788         }
 789
 790         os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
 791         wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
 792         os_free(wpa_s->sme.ft_ies);
 793         wpa_s->sme.ft_ies = os_malloc(ies_len);
 794         if (wpa_s->sme.ft_ies == NULL)
 795                 return -1;
 796         os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
 797         wpa_s->sme.ft_ies_len = ies_len;
 798         return 0;
 799 }
 800
 801
 802 static void sme_deauth(struct wpa_supplicant *wpa_s)
 803 {
 804         int bssid_changed;
 805
 806         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 807
 808         if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
 809                                    WLAN_REASON_DEAUTH_LEAVING) < 0) {
 810                 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
 811                         "failed");
 812         }
 813         wpa_s->sme.prev_bssid_set = 0;
 814
 815         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 816         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 817         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 818         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 819         if (bssid_changed)
 820                 wpas_notify_bssid_changed(wpa_s);
 821 }
 822
 823
 824 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
 825                             union wpa_event_data *data)
 826 {
 827         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
 828                 "status code %d", MAC2STR(wpa_s->pending_bssid),
 829                 data->assoc_reject.status_code);
 830
 831         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 832
 833         /*
 834          * For now, unconditionally terminate the previous authentication. In
 835          * theory, this should not be needed, but mac80211 gets quite confused
 836          * if the authentication is left pending.. Some roaming cases might
 837          * benefit from using the previous authentication, so this could be
 838          * optimized in the future.
 839          */
 840         sme_deauth(wpa_s);
 841 }
 842
 843
 844 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
 845                               union wpa_event_data *data)
 846 {
 847         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
 848         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 849         wpa_supplicant_mark_disassoc(wpa_s);
 850 }
 851
 852
 853 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
 854                                union wpa_event_data *data)
 855 {
 856         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
 857         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 858         wpa_supplicant_mark_disassoc(wpa_s);
 859 }
 860
 861
 862 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
 863                         struct disassoc_info *info)
 864 {
 865         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
 866         if (wpa_s->sme.prev_bssid_set) {
 867                 /*
 868                  * cfg80211/mac80211 can get into somewhat confused state if
 869                  * the AP only disassociates us and leaves us in authenticated
 870                  * state. For now, force the state to be cleared to avoid
 871                  * confusing errors if we try to associate with the AP again.
 872                  */
 873                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
 874                         "driver state");
 875                 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
 876                                        WLAN_REASON_DEAUTH_LEAVING);
 877         }
 878 }
 879
 880
 881 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
 882 {
 883         struct wpa_supplicant *wpa_s = eloop_ctx;
 884         if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
 885                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
 886                 sme_deauth(wpa_s);
 887         }
 888 }
 889
 890
 891 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
 892 {
 893         struct wpa_supplicant *wpa_s = eloop_ctx;
 894         if (wpa_s->wpa_state == WPA_ASSOCIATING) {
 895                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
 896                 sme_deauth(wpa_s);
 897         }
 898 }
 899
 900
 901 void sme_state_changed(struct wpa_supplicant *wpa_s)
 902 {
 903         /* Make sure timers are cleaned up appropriately. */
 904         if (wpa_s->wpa_state != WPA_ASSOCIATING)
 905                 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 906         if (wpa_s->wpa_state != WPA_AUTHENTICATING)
 907                 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 908 }
 909
 910
 911 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
 912                                        const u8 *prev_pending_bssid)
 913 {
 914         /*
 915          * mac80211-workaround to force deauth on failed auth cmd,
 916          * requires us to remain in authenticating state to allow the
 917          * second authentication attempt to be continued properly.
 918          */
 919         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
 920                 "to proceed after disconnection event");
 921         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 922         os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
 923
 924         /*
 925          * Re-arm authentication timer in case auth fails for whatever reason.
 926          */
 927         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 928         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 929                                NULL);
 930 }
 931
 932
 933 void sme_deinit(struct wpa_supplicant *wpa_s)
 934 {
 935         os_free(wpa_s->sme.ft_ies);
 936         wpa_s->sme.ft_ies = NULL;
 937         wpa_s->sme.ft_ies_len = 0;
 938 #ifdef CONFIG_IEEE80211W
 939         sme_stop_sa_query(wpa_s);
 940 #endif /* CONFIG_IEEE80211W */
 941 #ifdef CONFIG_SAE
 942         wpabuf_free(wpa_s->sme.sae_token);
 943         wpa_s->sme.sae_token = NULL;
 944         sae_clear_data(&wpa_s->sme.sae);
 945 #endif /* CONFIG_SAE */
 946
 947         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 948         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 949         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
 950 }
 951
 952
 953 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
 954                                    const u8 *chan_list, u8 num_channels,
 955                                    u8 num_intol)
 956 {
 957         struct ieee80211_2040_bss_coex_ie *bc_ie;
 958         struct ieee80211_2040_intol_chan_report *ic_report;
 959         struct wpabuf *buf;
 960
 961         wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR,
 962                    MAC2STR(wpa_s->bssid));
 963
 964         buf = wpabuf_alloc(2 + /* action.category + action_code */
 965                            sizeof(struct ieee80211_2040_bss_coex_ie) +
 966                            sizeof(struct ieee80211_2040_intol_chan_report) +
 967                            num_channels);
 968         if (buf == NULL)
 969                 return;
 970
 971         wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
 972         wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
 973
 974         bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
 975         bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
 976         bc_ie->length = 1;
 977         if (num_intol)
 978                 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
 979
 980         if (num_channels > 0) {
 981                 ic_report = wpabuf_put(buf, sizeof(*ic_report));
 982                 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
 983                 ic_report->length = num_channels + 1;
 984                 ic_report->op_class = 0;
 985                 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
 986                           num_channels);
 987         }
 988
 989         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
 990                                 wpa_s->own_addr, wpa_s->bssid,
 991                                 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
 992                 wpa_msg(wpa_s, MSG_INFO,
 993                         "SME: Failed to send 20/40 BSS Coexistence frame");
 994         }
 995
 996         wpabuf_free(buf);
 997 }
 998
 999
1000 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
1001 {
1002         struct wpa_bss *bss;
1003         const u8 *ie;
1004         u16 ht_cap;
1005         u8 chan_list[P2P_MAX_CHANNELS], channel;
1006         u8 num_channels = 0, num_intol = 0, i;
1007
1008         if (!wpa_s->sme.sched_obss_scan)
1009                 return 0;
1010
1011         wpa_s->sme.sched_obss_scan = 0;
1012         if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
1013                 return 1;
1014
1015         /*
1016          * Check whether AP uses regulatory triplet or channel triplet in
1017          * country info. Right now the operating class of the BSS channel
1018          * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
1019          * based on the assumption that operating class triplet is not used in
1020          * beacon frame. If the First Channel Number/Operating Extension
1021          * Identifier octet has a positive integer value of 201 or greater,
1022          * then its operating class triplet.
1023          *
1024          * TODO: If Supported Operating Classes element is present in beacon
1025          * frame, have to lookup operating class in Annex E and fill them in
1026          * 2040 coex frame.
1027          */
1028         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
1029         if (ie && (ie[1] >= 6) && (ie[5] >= 201))
1030                 return 1;
1031
1032         os_memset(chan_list, 0, sizeof(chan_list));
1033
1034         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1035                 /* Skip other band bss */
1036                 enum hostapd_hw_mode mode;
1037                 mode = ieee80211_freq_to_chan(bss->freq, &channel);
1038                 if (mode != HOSTAPD_MODE_IEEE80211G &&
1039                     mode != HOSTAPD_MODE_IEEE80211B)
1040                         continue;
1041
1042                 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
1043                 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
1044
1045                 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
1046                         /* Check whether the channel is already considered */
1047                         for (i = 0; i < num_channels; i++) {
1048                                 if (channel == chan_list[i])
1049                                         break;
1050                         }
1051                         if (i != num_channels)
1052                                 continue;
1053
1054                         if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
1055                                 num_intol++;
1056
1057                         chan_list[num_channels++] = channel;
1058                 }
1059         }
1060
1061         sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
1062         return 1;
1063 }
1064
1065
1066 static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
1067                                           u16 num_modes,
1068                                           enum hostapd_hw_mode mode)
1069 {
1070         u16 i;
1071
1072         for (i = 0; i < num_modes; i++) {
1073                 if (modes[i].mode == mode)
1074                         return &modes[i];
1075         }
1076
1077         return NULL;
1078 }
1079
1080
1081 static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s,
1082                                         enum hostapd_hw_mode band,
1083                                         struct wpa_driver_scan_params *params)
1084 {
1085         /* Include only supported channels for the specified band */
1086         struct hostapd_hw_modes *mode;
1087         int count, i;
1088
1089         mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band);
1090         if (mode == NULL) {
1091                 /* No channels supported in this band - use empty list */
1092                 params->freqs = os_zalloc(sizeof(int));
1093                 return;
1094         }
1095
1096         params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
1097         if (params->freqs == NULL)
1098                 return;
1099         for (count = 0, i = 0; i < mode->num_channels; i++) {
1100                 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
1101                         continue;
1102                 params->freqs[count++] = mode->channels[i].freq;
1103         }
1104 }
1105
1106
1107 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1108 {
1109         struct wpa_supplicant *wpa_s = eloop_ctx;
1110         struct wpa_driver_scan_params params;
1111
1112         if (!wpa_s->current_bss) {
1113                 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
1114                 return;
1115         }
1116
1117         os_memset(&params, 0, sizeof(params));
1118         wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G, &params);
1119         wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
1120
1121         if (wpa_supplicant_trigger_scan(wpa_s, &params))
1122                 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
1123         else
1124                 wpa_s->sme.sched_obss_scan = 1;
1125         os_free(params.freqs);
1126
1127         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1128                                sme_obss_scan_timeout, wpa_s, NULL);
1129 }
1130
1131
1132 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
1133 {
1134         const u8 *ie;
1135         struct wpa_bss *bss = wpa_s->current_bss;
1136         struct wpa_ssid *ssid = wpa_s->current_ssid;
1137         struct hostapd_hw_modes *hw_mode = NULL;
1138         int i;
1139
1140         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1141         wpa_s->sme.sched_obss_scan = 0;
1142         if (!enable)
1143                 return;
1144
1145         /*
1146          * Schedule OBSS scan if driver is using station SME in wpa_supplicant
1147          * or it expects OBSS scan to be performed by wpa_supplicant.
1148          */
1149         if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
1150               (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
1151             ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
1152                 return;
1153
1154         if (!wpa_s->hw.modes)
1155                 return;
1156
1157         /* only HT caps in 11g mode are relevant */
1158         for (i = 0; i < wpa_s->hw.num_modes; i++) {
1159                 hw_mode = &wpa_s->hw.modes[i];
1160                 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
1161                         break;
1162         }
1163
1164         /* Driver does not support HT40 for 11g or doesn't have 11g. */
1165         if (i == wpa_s->hw.num_modes || !hw_mode ||
1166             !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1167                 return;
1168
1169         if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
1170                 return; /* Not associated on 2.4 GHz band */
1171
1172         /* Check whether AP supports HT40 */
1173         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
1174         if (!ie || ie[1] < 2 ||
1175             !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1176                 return; /* AP does not support HT40 */
1177
1178         ie = wpa_bss_get_ie(wpa_s->current_bss,
1179                             WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
1180         if (!ie || ie[1] < 14)
1181                 return; /* AP does not request OBSS scans */
1182
1183         wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
1184         if (wpa_s->sme.obss_scan_int < 10) {
1185                 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
1186                            "replaced with the minimum 10 sec",
1187                            wpa_s->sme.obss_scan_int);
1188                 wpa_s->sme.obss_scan_int = 10;
1189         }
1190         wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
1191                    wpa_s->sme.obss_scan_int);
1192         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1193                                sme_obss_scan_timeout, wpa_s, NULL);
1194 }
1195
1196
1197 #ifdef CONFIG_IEEE80211W
1198
1199 static const unsigned int sa_query_max_timeout = 1000;
1200 static const unsigned int sa_query_retry_timeout = 201;
1201
1202 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
1203 {
1204         u32 tu;
1205         struct os_reltime now, passed;
1206         os_get_reltime(&now);
1207         os_reltime_sub(&now, &wpa_s->sme.sa_query_start, &passed);
1208         tu = (passed.sec * 1000000 + passed.usec) / 1024;
1209         if (sa_query_max_timeout < tu) {
1210                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
1211                 sme_stop_sa_query(wpa_s);
1212                 wpa_supplicant_deauthenticate(
1213                         wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
1214                 return 1;
1215         }
1216
1217         return 0;
1218 }
1219
1220
1221 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
1222                                   const u8 *trans_id)
1223 {
1224         u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
1225         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
1226                 MACSTR, MAC2STR(wpa_s->bssid));
1227         wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
1228                     trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1229         req[0] = WLAN_ACTION_SA_QUERY;
1230         req[1] = WLAN_SA_QUERY_REQUEST;
1231         os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1232         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1233                                 wpa_s->own_addr, wpa_s->bssid,
1234                                 req, sizeof(req), 0) < 0)
1235                 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
1236                         "Request");
1237 }
1238
1239
1240 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
1241 {
1242         struct wpa_supplicant *wpa_s = eloop_ctx;
1243         unsigned int timeout, sec, usec;
1244         u8 *trans_id, *nbuf;
1245
1246         if (wpa_s->sme.sa_query_count > 0 &&
1247             sme_check_sa_query_timeout(wpa_s))
1248                 return;
1249
1250         nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
1251                                 wpa_s->sme.sa_query_count + 1,
1252                                 WLAN_SA_QUERY_TR_ID_LEN);
1253         if (nbuf == NULL)
1254                 return;
1255         if (wpa_s->sme.sa_query_count == 0) {
1256                 /* Starting a new SA Query procedure */
1257                 os_get_reltime(&wpa_s->sme.sa_query_start);
1258         }
1259         trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
1260         wpa_s->sme.sa_query_trans_id = nbuf;
1261         wpa_s->sme.sa_query_count++;
1262
1263         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1264
1265         timeout = sa_query_retry_timeout;
1266         sec = ((timeout / 1000) * 1024) / 1000;
1267         usec = (timeout % 1000) * 1024;
1268         eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
1269
1270         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
1271                 wpa_s->sme.sa_query_count);
1272
1273         sme_send_sa_query_req(wpa_s, trans_id);
1274 }
1275
1276
1277 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
1278 {
1279         sme_sa_query_timer(wpa_s, NULL);
1280 }
1281
1282
1283 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
1284 {
1285         eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
1286         os_free(wpa_s->sme.sa_query_trans_id);
1287         wpa_s->sme.sa_query_trans_id = NULL;
1288         wpa_s->sme.sa_query_count = 0;
1289 }
1290
1291
1292 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1293                                  const u8 *da, u16 reason_code)
1294 {
1295         struct wpa_ssid *ssid;
1296
1297         if (wpa_s->wpa_state != WPA_COMPLETED)
1298                 return;
1299         ssid = wpa_s->current_ssid;
1300         if (ssid == NULL ||
1301             (ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
1302              wpa_s->conf->pmf : ssid->ieee80211w) == NO_MGMT_FRAME_PROTECTION)
1303                 return;
1304         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1305                 return;
1306         if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1307             reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1308                 return;
1309         if (wpa_s->sme.sa_query_count > 0)
1310                 return;
1311
1312         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1313                 "possible AP/STA state mismatch - trigger SA Query");
1314         sme_start_sa_query(wpa_s);
1315 }
1316
1317
1318 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1319                      const u8 *data, size_t len)
1320 {
1321         int i;
1322
1323         if (wpa_s->sme.sa_query_trans_id == NULL ||
1324             len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1325             data[0] != WLAN_SA_QUERY_RESPONSE)
1326                 return;
1327         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1328                 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1329
1330         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1331                 return;
1332
1333         for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1334                 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1335                               i * WLAN_SA_QUERY_TR_ID_LEN,
1336                               data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1337                         break;
1338         }
1339
1340         if (i >= wpa_s->sme.sa_query_count) {
1341                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1342                         "transaction identifier found");
1343                 return;
1344         }
1345
1346         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1347                 "from " MACSTR, MAC2STR(sa));
1348         sme_stop_sa_query(wpa_s);
1349 }
1350
1351 #endif /* CONFIG_IEEE80211W */