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                 wpas_connect_work_free(cwork);
 448                 return;
 449         }
 450
 451         wpa_s->connect_work = work;
 452
 453         if (!wpas_valid_bss_ssid(wpa_s, cwork->bss, cwork->ssid)) {
 454                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: BSS/SSID entry for authentication not valid anymore - drop connection attempt");
 455                 wpas_connect_work_done(wpa_s);
 456                 return;
 457         }
 458
 459         sme_send_authentication(wpa_s, cwork->bss, cwork->ssid, 1);
 460 }
 461
 462
 463 void sme_authenticate(struct wpa_supplicant *wpa_s,
 464                       struct wpa_bss *bss, struct wpa_ssid *ssid)
 465 {
 466         struct wpa_connect_work *cwork;
 467
 468         if (bss == NULL || ssid == NULL)
 469                 return;
 470         if (wpa_s->connect_work) {
 471                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reject sme_authenticate() call since connect_work exist");
 472                 return;
 473         }
 474
 475         cwork = os_zalloc(sizeof(*cwork));
 476         if (cwork == NULL)
 477                 return;
 478         cwork->bss = bss;
 479         cwork->ssid = ssid;
 480         cwork->sme = 1;
 481
 482 #ifdef CONFIG_SAE
 483         wpa_s->sme.sae.state = SAE_NOTHING;
 484         wpa_s->sme.sae.send_confirm = 0;
 485         wpa_s->sme.sae_group_index = 0;
 486 #endif /* CONFIG_SAE */
 487
 488         if (radio_add_work(wpa_s, bss->freq, "sme-connect", 1,
 489                            sme_auth_start_cb, cwork) < 0)
 490                 wpas_connect_work_free(cwork);
 491 }
 492
 493
 494 #ifdef CONFIG_SAE
 495
 496 static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
 497                         u16 status_code, const u8 *data, size_t len)
 498 {
 499         wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
 500                 "status code %u", auth_transaction, status_code);
 501
 502         if (auth_transaction == 1 &&
 503             status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
 504             wpa_s->sme.sae.state == SAE_COMMITTED &&
 505             wpa_s->current_bss && wpa_s->current_ssid) {
 506                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE anti-clogging token "
 507                         "requested");
 508                 wpabuf_free(wpa_s->sme.sae_token);
 509                 wpa_s->sme.sae_token = wpabuf_alloc_copy(data, len);
 510                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 511                                         wpa_s->current_ssid, 1);
 512                 return 0;
 513         }
 514
 515         if (auth_transaction == 1 &&
 516             status_code == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED &&
 517             wpa_s->sme.sae.state == SAE_COMMITTED &&
 518             wpa_s->current_bss && wpa_s->current_ssid) {
 519                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE group not supported");
 520                 wpa_s->sme.sae_group_index++;
 521                 if (sme_set_sae_group(wpa_s) < 0)
 522                         return -1; /* no other groups enabled */
 523                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Try next enabled SAE group");
 524                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 525                                         wpa_s->current_ssid, 1);
 526                 return 0;
 527         }
 528
 529         if (status_code != WLAN_STATUS_SUCCESS)
 530                 return -1;
 531
 532         if (auth_transaction == 1) {
 533                 int *groups = wpa_s->conf->sae_groups;
 534
 535                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
 536                 if (wpa_s->current_bss == NULL ||
 537                     wpa_s->current_ssid == NULL)
 538                         return -1;
 539                 if (wpa_s->sme.sae.state != SAE_COMMITTED)
 540                         return -1;
 541                 if (groups && groups[0] <= 0)
 542                         groups = NULL;
 543                 if (sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL,
 544                                      groups) != WLAN_STATUS_SUCCESS)
 545                         return -1;
 546
 547                 if (sae_process_commit(&wpa_s->sme.sae) < 0) {
 548                         wpa_printf(MSG_DEBUG, "SAE: Failed to process peer "
 549                                    "commit");
 550                         return -1;
 551                 }
 552
 553                 wpabuf_free(wpa_s->sme.sae_token);
 554                 wpa_s->sme.sae_token = NULL;
 555                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 556                                         wpa_s->current_ssid, 0);
 557                 return 0;
 558         } else if (auth_transaction == 2) {
 559                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
 560                 if (wpa_s->sme.sae.state != SAE_CONFIRMED)
 561                         return -1;
 562                 if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0)
 563                         return -1;
 564                 wpa_s->sme.sae.state = SAE_ACCEPTED;
 565                 sae_clear_temp_data(&wpa_s->sme.sae);
 566                 return 1;
 567         }
 568
 569         return -1;
 570 }
 571 #endif /* CONFIG_SAE */
 572
 573
 574 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
 575 {
 576         struct wpa_ssid *ssid = wpa_s->current_ssid;
 577
 578         if (ssid == NULL) {
 579                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 580                         "when network is not selected");
 581                 return;
 582         }
 583
 584         if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
 585                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 586                         "when not in authenticating state");
 587                 return;
 588         }
 589
 590         if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
 591                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
 592                         "unexpected peer " MACSTR,
 593                         MAC2STR(data->auth.peer));
 594                 return;
 595         }
 596
 597         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
 598                 " auth_type=%d auth_transaction=%d status_code=%d",
 599                 MAC2STR(data->auth.peer), data->auth.auth_type,
 600                 data->auth.auth_transaction, data->auth.status_code);
 601         wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
 602                     data->auth.ies, data->auth.ies_len);
 603
 604         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 605
 606 #ifdef CONFIG_SAE
 607         if (data->auth.auth_type == WLAN_AUTH_SAE) {
 608                 int res;
 609                 res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
 610                                    data->auth.status_code, data->auth.ies,
 611                                    data->auth.ies_len);
 612                 if (res < 0) {
 613                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 614                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 615
 616                 }
 617                 if (res != 1)
 618                         return;
 619
 620                 wpa_printf(MSG_DEBUG, "SME: SAE completed - setting PMK for "
 621                            "4-way handshake");
 622                 wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN);
 623         }
 624 #endif /* CONFIG_SAE */
 625
 626         if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
 627                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
 628                         "code %d)", data->auth.status_code);
 629
 630                 if (data->auth.status_code !=
 631                     WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
 632                     wpa_s->sme.auth_alg == data->auth.auth_type ||
 633                     wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
 634                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 635                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 636                         return;
 637                 }
 638
 639                 switch (data->auth.auth_type) {
 640                 case WLAN_AUTH_OPEN:
 641                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 642
 643                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
 644                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 645                                                  wpa_s->current_ssid);
 646                         return;
 647
 648                 case WLAN_AUTH_SHARED_KEY:
 649                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
 650
 651                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
 652                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 653                                                  wpa_s->current_ssid);
 654                         return;
 655
 656                 default:
 657                         return;
 658                 }
 659         }
 660
 661 #ifdef CONFIG_IEEE80211R
 662         if (data->auth.auth_type == WLAN_AUTH_FT) {
 663                 union wpa_event_data edata;
 664                 os_memset(&edata, 0, sizeof(edata));
 665                 edata.ft_ies.ies = data->auth.ies;
 666                 edata.ft_ies.ies_len = data->auth.ies_len;
 667                 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
 668                 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
 669         }
 670 #endif /* CONFIG_IEEE80211R */
 671
 672         sme_associate(wpa_s, ssid->mode, data->auth.peer,
 673                       data->auth.auth_type);
 674 }
 675
 676
 677 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
 678                    const u8 *bssid, u16 auth_type)
 679 {
 680         struct wpa_driver_associate_params params;
 681         struct ieee802_11_elems elems;
 682 #ifdef CONFIG_HT_OVERRIDES
 683         struct ieee80211_ht_capabilities htcaps;
 684         struct ieee80211_ht_capabilities htcaps_mask;
 685 #endif /* CONFIG_HT_OVERRIDES */
 686 #ifdef CONFIG_VHT_OVERRIDES
 687         struct ieee80211_vht_capabilities vhtcaps;
 688         struct ieee80211_vht_capabilities vhtcaps_mask;
 689 #endif /* CONFIG_VHT_OVERRIDES */
 690
 691         os_memset(&params, 0, sizeof(params));
 692         params.bssid = bssid;
 693         params.ssid = wpa_s->sme.ssid;
 694         params.ssid_len = wpa_s->sme.ssid_len;
 695         params.freq = wpa_s->sme.freq;
 696         params.bg_scan_period = wpa_s->current_ssid ?
 697                 wpa_s->current_ssid->bg_scan_period : -1;
 698         params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
 699                 wpa_s->sme.assoc_req_ie : NULL;
 700         params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
 701         params.pairwise_suite = wpa_s->pairwise_cipher;
 702         params.group_suite = wpa_s->group_cipher;
 703 #ifdef CONFIG_HT_OVERRIDES
 704         os_memset(&htcaps, 0, sizeof(htcaps));
 705         os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
 706         params.htcaps = (u8 *) &htcaps;
 707         params.htcaps_mask = (u8 *) &htcaps_mask;
 708         wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, &params);
 709 #endif /* CONFIG_HT_OVERRIDES */
 710 #ifdef CONFIG_VHT_OVERRIDES
 711         os_memset(&vhtcaps, 0, sizeof(vhtcaps));
 712         os_memset(&vhtcaps_mask, 0, sizeof(vhtcaps_mask));
 713         params.vhtcaps = &vhtcaps;
 714         params.vhtcaps_mask = &vhtcaps_mask;
 715         wpa_supplicant_apply_vht_overrides(wpa_s, wpa_s->current_ssid, &params);
 716 #endif /* CONFIG_VHT_OVERRIDES */
 717 #ifdef CONFIG_IEEE80211R
 718         if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
 719                 params.wpa_ie = wpa_s->sme.ft_ies;
 720                 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
 721         }
 722 #endif /* CONFIG_IEEE80211R */
 723         params.mode = mode;
 724         params.mgmt_frame_protection = wpa_s->sme.mfp;
 725         if (wpa_s->sme.prev_bssid_set)
 726                 params.prev_bssid = wpa_s->sme.prev_bssid;
 727
 728         wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
 729                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 730                 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
 731                 params.freq);
 732
 733         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
 734
 735         if (params.wpa_ie == NULL ||
 736             ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
 737             < 0) {
 738                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
 739                 os_memset(&elems, 0, sizeof(elems));
 740         }
 741         if (elems.rsn_ie) {
 742                 params.wpa_proto = WPA_PROTO_RSN;
 743                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
 744                                         elems.rsn_ie_len + 2);
 745         } else if (elems.wpa_ie) {
 746                 params.wpa_proto = WPA_PROTO_WPA;
 747                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
 748                                         elems.wpa_ie_len + 2);
 749         } else
 750                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 751         if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
 752                 params.p2p = 1;
 753
 754         if (wpa_s->parent->set_sta_uapsd)
 755                 params.uapsd = wpa_s->parent->sta_uapsd;
 756         else
 757                 params.uapsd = -1;
 758
 759         if (wpa_drv_associate(wpa_s, &params) < 0) {
 760                 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
 761                         "driver failed");
 762                 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 763                 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 764                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 765                 return;
 766         }
 767
 768         eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
 769                                NULL);
 770 }
 771
 772
 773 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
 774                       const u8 *ies, size_t ies_len)
 775 {
 776         if (md == NULL || ies == NULL) {
 777                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
 778                 os_free(wpa_s->sme.ft_ies);
 779                 wpa_s->sme.ft_ies = NULL;
 780                 wpa_s->sme.ft_ies_len = 0;
 781                 wpa_s->sme.ft_used = 0;
 782                 return 0;
 783         }
 784
 785         os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
 786         wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
 787         os_free(wpa_s->sme.ft_ies);
 788         wpa_s->sme.ft_ies = os_malloc(ies_len);
 789         if (wpa_s->sme.ft_ies == NULL)
 790                 return -1;
 791         os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
 792         wpa_s->sme.ft_ies_len = ies_len;
 793         return 0;
 794 }
 795
 796
 797 static void sme_deauth(struct wpa_supplicant *wpa_s)
 798 {
 799         int bssid_changed;
 800
 801         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 802
 803         if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
 804                                    WLAN_REASON_DEAUTH_LEAVING) < 0) {
 805                 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
 806                         "failed");
 807         }
 808         wpa_s->sme.prev_bssid_set = 0;
 809
 810         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 811         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 812         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 813         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 814         if (bssid_changed)
 815                 wpas_notify_bssid_changed(wpa_s);
 816 }
 817
 818
 819 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
 820                             union wpa_event_data *data)
 821 {
 822         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
 823                 "status code %d", MAC2STR(wpa_s->pending_bssid),
 824                 data->assoc_reject.status_code);
 825
 826         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 827
 828         /*
 829          * For now, unconditionally terminate the previous authentication. In
 830          * theory, this should not be needed, but mac80211 gets quite confused
 831          * if the authentication is left pending.. Some roaming cases might
 832          * benefit from using the previous authentication, so this could be
 833          * optimized in the future.
 834          */
 835         sme_deauth(wpa_s);
 836 }
 837
 838
 839 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
 840                               union wpa_event_data *data)
 841 {
 842         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
 843         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 844         wpa_supplicant_mark_disassoc(wpa_s);
 845 }
 846
 847
 848 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
 849                                union wpa_event_data *data)
 850 {
 851         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
 852         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 853         wpa_supplicant_mark_disassoc(wpa_s);
 854 }
 855
 856
 857 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
 858                         struct disassoc_info *info)
 859 {
 860         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
 861         if (wpa_s->sme.prev_bssid_set) {
 862                 /*
 863                  * cfg80211/mac80211 can get into somewhat confused state if
 864                  * the AP only disassociates us and leaves us in authenticated
 865                  * state. For now, force the state to be cleared to avoid
 866                  * confusing errors if we try to associate with the AP again.
 867                  */
 868                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
 869                         "driver state");
 870                 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
 871                                        WLAN_REASON_DEAUTH_LEAVING);
 872         }
 873 }
 874
 875
 876 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
 877 {
 878         struct wpa_supplicant *wpa_s = eloop_ctx;
 879         if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
 880                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
 881                 sme_deauth(wpa_s);
 882         }
 883 }
 884
 885
 886 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
 887 {
 888         struct wpa_supplicant *wpa_s = eloop_ctx;
 889         if (wpa_s->wpa_state == WPA_ASSOCIATING) {
 890                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
 891                 sme_deauth(wpa_s);
 892         }
 893 }
 894
 895
 896 void sme_state_changed(struct wpa_supplicant *wpa_s)
 897 {
 898         /* Make sure timers are cleaned up appropriately. */
 899         if (wpa_s->wpa_state != WPA_ASSOCIATING)
 900                 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 901         if (wpa_s->wpa_state != WPA_AUTHENTICATING)
 902                 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 903 }
 904
 905
 906 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
 907                                        const u8 *prev_pending_bssid)
 908 {
 909         /*
 910          * mac80211-workaround to force deauth on failed auth cmd,
 911          * requires us to remain in authenticating state to allow the
 912          * second authentication attempt to be continued properly.
 913          */
 914         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
 915                 "to proceed after disconnection event");
 916         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 917         os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
 918
 919         /*
 920          * Re-arm authentication timer in case auth fails for whatever reason.
 921          */
 922         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 923         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 924                                NULL);
 925 }
 926
 927
 928 void sme_deinit(struct wpa_supplicant *wpa_s)
 929 {
 930         os_free(wpa_s->sme.ft_ies);
 931         wpa_s->sme.ft_ies = NULL;
 932         wpa_s->sme.ft_ies_len = 0;
 933 #ifdef CONFIG_IEEE80211W
 934         sme_stop_sa_query(wpa_s);
 935 #endif /* CONFIG_IEEE80211W */
 936 #ifdef CONFIG_SAE
 937         wpabuf_free(wpa_s->sme.sae_token);
 938         wpa_s->sme.sae_token = NULL;
 939         sae_clear_data(&wpa_s->sme.sae);
 940 #endif /* CONFIG_SAE */
 941
 942         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 943         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 944         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
 945 }
 946
 947
 948 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
 949                                    const u8 *chan_list, u8 num_channels,
 950                                    u8 num_intol)
 951 {
 952         struct ieee80211_2040_bss_coex_ie *bc_ie;
 953         struct ieee80211_2040_intol_chan_report *ic_report;
 954         struct wpabuf *buf;
 955
 956         wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR,
 957                    MAC2STR(wpa_s->bssid));
 958
 959         buf = wpabuf_alloc(2 + /* action.category + action_code */
 960                            sizeof(struct ieee80211_2040_bss_coex_ie) +
 961                            sizeof(struct ieee80211_2040_intol_chan_report) +
 962                            num_channels);
 963         if (buf == NULL)
 964                 return;
 965
 966         wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
 967         wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
 968
 969         bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
 970         bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
 971         bc_ie->length = 1;
 972         if (num_intol)
 973                 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
 974
 975         if (num_channels > 0) {
 976                 ic_report = wpabuf_put(buf, sizeof(*ic_report));
 977                 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
 978                 ic_report->length = num_channels + 1;
 979                 ic_report->op_class = 0;
 980                 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
 981                           num_channels);
 982         }
 983
 984         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
 985                                 wpa_s->own_addr, wpa_s->bssid,
 986                                 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
 987                 wpa_msg(wpa_s, MSG_INFO,
 988                         "SME: Failed to send 20/40 BSS Coexistence frame");
 989         }
 990
 991         wpabuf_free(buf);
 992 }
 993
 994
 995 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
 996 {
 997         struct wpa_bss *bss;
 998         const u8 *ie;
 999         u16 ht_cap;
1000         u8 chan_list[P2P_MAX_CHANNELS], channel;
1001         u8 num_channels = 0, num_intol = 0, i;
1002
1003         if (!wpa_s->sme.sched_obss_scan)
1004                 return 0;
1005
1006         wpa_s->sme.sched_obss_scan = 0;
1007         if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
1008                 return 1;
1009
1010         /*
1011          * Check whether AP uses regulatory triplet or channel triplet in
1012          * country info. Right now the operating class of the BSS channel
1013          * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
1014          * based on the assumption that operating class triplet is not used in
1015          * beacon frame. If the First Channel Number/Operating Extension
1016          * Identifier octet has a positive integer value of 201 or greater,
1017          * then its operating class triplet.
1018          *
1019          * TODO: If Supported Operating Classes element is present in beacon
1020          * frame, have to lookup operating class in Annex E and fill them in
1021          * 2040 coex frame.
1022          */
1023         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
1024         if (ie && (ie[1] >= 6) && (ie[5] >= 201))
1025                 return 1;
1026
1027         os_memset(chan_list, 0, sizeof(chan_list));
1028
1029         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1030                 /* Skip other band bss */
1031                 enum hostapd_hw_mode mode;
1032                 mode = ieee80211_freq_to_chan(bss->freq, &channel);
1033                 if (mode != HOSTAPD_MODE_IEEE80211G &&
1034                     mode != HOSTAPD_MODE_IEEE80211B)
1035                         continue;
1036
1037                 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
1038                 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
1039
1040                 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
1041                         /* Check whether the channel is already considered */
1042                         for (i = 0; i < num_channels; i++) {
1043                                 if (channel == chan_list[i])
1044                                         break;
1045                         }
1046                         if (i != num_channels)
1047                                 continue;
1048
1049                         if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
1050                                 num_intol++;
1051
1052                         chan_list[num_channels++] = channel;
1053                 }
1054         }
1055
1056         sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
1057         return 1;
1058 }
1059
1060
1061 static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
1062                                           u16 num_modes,
1063                                           enum hostapd_hw_mode mode)
1064 {
1065         u16 i;
1066
1067         for (i = 0; i < num_modes; i++) {
1068                 if (modes[i].mode == mode)
1069                         return &modes[i];
1070         }
1071
1072         return NULL;
1073 }
1074
1075
1076 static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s,
1077                                         enum hostapd_hw_mode band,
1078                                         struct wpa_driver_scan_params *params)
1079 {
1080         /* Include only supported channels for the specified band */
1081         struct hostapd_hw_modes *mode;
1082         int count, i;
1083
1084         mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band);
1085         if (mode == NULL) {
1086                 /* No channels supported in this band - use empty list */
1087                 params->freqs = os_zalloc(sizeof(int));
1088                 return;
1089         }
1090
1091         params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
1092         if (params->freqs == NULL)
1093                 return;
1094         for (count = 0, i = 0; i < mode->num_channels; i++) {
1095                 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
1096                         continue;
1097                 params->freqs[count++] = mode->channels[i].freq;
1098         }
1099 }
1100
1101
1102 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1103 {
1104         struct wpa_supplicant *wpa_s = eloop_ctx;
1105         struct wpa_driver_scan_params params;
1106
1107         if (!wpa_s->current_bss) {
1108                 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
1109                 return;
1110         }
1111
1112         os_memset(&params, 0, sizeof(params));
1113         wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G, &params);
1114         wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
1115
1116         if (wpa_supplicant_trigger_scan(wpa_s, &params))
1117                 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
1118         else
1119                 wpa_s->sme.sched_obss_scan = 1;
1120         os_free(params.freqs);
1121
1122         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1123                                sme_obss_scan_timeout, wpa_s, NULL);
1124 }
1125
1126
1127 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
1128 {
1129         const u8 *ie;
1130         struct wpa_bss *bss = wpa_s->current_bss;
1131         struct wpa_ssid *ssid = wpa_s->current_ssid;
1132         struct hostapd_hw_modes *hw_mode = NULL;
1133         int i;
1134
1135         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1136         wpa_s->sme.sched_obss_scan = 0;
1137         if (!enable)
1138                 return;
1139
1140         /*
1141          * Schedule OBSS scan if driver is using station SME in wpa_supplicant
1142          * or it expects OBSS scan to be performed by wpa_supplicant.
1143          */
1144         if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
1145               (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
1146             ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
1147                 return;
1148
1149         if (!wpa_s->hw.modes)
1150                 return;
1151
1152         /* only HT caps in 11g mode are relevant */
1153         for (i = 0; i < wpa_s->hw.num_modes; i++) {
1154                 hw_mode = &wpa_s->hw.modes[i];
1155                 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
1156                         break;
1157         }
1158
1159         /* Driver does not support HT40 for 11g or doesn't have 11g. */
1160         if (i == wpa_s->hw.num_modes || !hw_mode ||
1161             !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1162                 return;
1163
1164         if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
1165                 return; /* Not associated on 2.4 GHz band */
1166
1167         /* Check whether AP supports HT40 */
1168         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
1169         if (!ie || ie[1] < 2 ||
1170             !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1171                 return; /* AP does not support HT40 */
1172
1173         ie = wpa_bss_get_ie(wpa_s->current_bss,
1174                             WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
1175         if (!ie || ie[1] < 14)
1176                 return; /* AP does not request OBSS scans */
1177
1178         wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
1179         if (wpa_s->sme.obss_scan_int < 10) {
1180                 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
1181                            "replaced with the minimum 10 sec",
1182                            wpa_s->sme.obss_scan_int);
1183                 wpa_s->sme.obss_scan_int = 10;
1184         }
1185         wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
1186                    wpa_s->sme.obss_scan_int);
1187         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1188                                sme_obss_scan_timeout, wpa_s, NULL);
1189 }
1190
1191
1192 #ifdef CONFIG_IEEE80211W
1193
1194 static const unsigned int sa_query_max_timeout = 1000;
1195 static const unsigned int sa_query_retry_timeout = 201;
1196
1197 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
1198 {
1199         u32 tu;
1200         struct os_reltime now, passed;
1201         os_get_reltime(&now);
1202         os_reltime_sub(&now, &wpa_s->sme.sa_query_start, &passed);
1203         tu = (passed.sec * 1000000 + passed.usec) / 1024;
1204         if (sa_query_max_timeout < tu) {
1205                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
1206                 sme_stop_sa_query(wpa_s);
1207                 wpa_supplicant_deauthenticate(
1208                         wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
1209                 return 1;
1210         }
1211
1212         return 0;
1213 }
1214
1215
1216 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
1217                                   const u8 *trans_id)
1218 {
1219         u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
1220         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
1221                 MACSTR, MAC2STR(wpa_s->bssid));
1222         wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
1223                     trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1224         req[0] = WLAN_ACTION_SA_QUERY;
1225         req[1] = WLAN_SA_QUERY_REQUEST;
1226         os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1227         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1228                                 wpa_s->own_addr, wpa_s->bssid,
1229                                 req, sizeof(req), 0) < 0)
1230                 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
1231                         "Request");
1232 }
1233
1234
1235 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
1236 {
1237         struct wpa_supplicant *wpa_s = eloop_ctx;
1238         unsigned int timeout, sec, usec;
1239         u8 *trans_id, *nbuf;
1240
1241         if (wpa_s->sme.sa_query_count > 0 &&
1242             sme_check_sa_query_timeout(wpa_s))
1243                 return;
1244
1245         nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
1246                                 wpa_s->sme.sa_query_count + 1,
1247                                 WLAN_SA_QUERY_TR_ID_LEN);
1248         if (nbuf == NULL)
1249                 return;
1250         if (wpa_s->sme.sa_query_count == 0) {
1251                 /* Starting a new SA Query procedure */
1252                 os_get_reltime(&wpa_s->sme.sa_query_start);
1253         }
1254         trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
1255         wpa_s->sme.sa_query_trans_id = nbuf;
1256         wpa_s->sme.sa_query_count++;
1257
1258         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1259
1260         timeout = sa_query_retry_timeout;
1261         sec = ((timeout / 1000) * 1024) / 1000;
1262         usec = (timeout % 1000) * 1024;
1263         eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
1264
1265         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
1266                 wpa_s->sme.sa_query_count);
1267
1268         sme_send_sa_query_req(wpa_s, trans_id);
1269 }
1270
1271
1272 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
1273 {
1274         sme_sa_query_timer(wpa_s, NULL);
1275 }
1276
1277
1278 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
1279 {
1280         eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
1281         os_free(wpa_s->sme.sa_query_trans_id);
1282         wpa_s->sme.sa_query_trans_id = NULL;
1283         wpa_s->sme.sa_query_count = 0;
1284 }
1285
1286
1287 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1288                                  const u8 *da, u16 reason_code)
1289 {
1290         struct wpa_ssid *ssid;
1291
1292         if (wpa_s->wpa_state != WPA_COMPLETED)
1293                 return;
1294         ssid = wpa_s->current_ssid;
1295         if (ssid == NULL ||
1296             (ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
1297              wpa_s->conf->pmf : ssid->ieee80211w) == NO_MGMT_FRAME_PROTECTION)
1298                 return;
1299         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1300                 return;
1301         if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1302             reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1303                 return;
1304         if (wpa_s->sme.sa_query_count > 0)
1305                 return;
1306
1307         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1308                 "possible AP/STA state mismatch - trigger SA Query");
1309         sme_start_sa_query(wpa_s);
1310 }
1311
1312
1313 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1314                      const u8 *data, size_t len)
1315 {
1316         int i;
1317
1318         if (wpa_s->sme.sa_query_trans_id == NULL ||
1319             len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1320             data[0] != WLAN_SA_QUERY_RESPONSE)
1321                 return;
1322         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1323                 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1324
1325         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1326                 return;
1327
1328         for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1329                 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1330                               i * WLAN_SA_QUERY_TR_ID_LEN,
1331                               data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1332                         break;
1333         }
1334
1335         if (i >= wpa_s->sme.sa_query_count) {
1336                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1337                         "transaction identifier found");
1338                 return;
1339         }
1340
1341         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1342                 "from " MACSTR, MAC2STR(sa));
1343         sme_stop_sa_query(wpa_s);
1344 }
1345
1346 #endif /* CONFIG_IEEE80211W */