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                         int pps_mo_id = hs20_get_pps_mo_id(wpa_s, ssid);
 364                         wpas_hs20_add_indication(hs20, pps_mo_id);
 365                         os_memcpy(wpa_s->sme.assoc_req_ie +
 366                                   wpa_s->sme.assoc_req_ie_len,
 367                                   wpabuf_head(hs20), wpabuf_len(hs20));
 368                         wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
 369                         wpabuf_free(hs20);
 370                 }
 371         }
 372 #endif /* CONFIG_HS20 */
 373
 374         ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab);
 375         if (ext_capab_len > 0) {
 376                 u8 *pos = wpa_s->sme.assoc_req_ie;
 377                 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
 378                         pos += 2 + pos[1];
 379                 os_memmove(pos + ext_capab_len, pos,
 380                            wpa_s->sme.assoc_req_ie_len -
 381                            (pos - wpa_s->sme.assoc_req_ie));
 382                 wpa_s->sme.assoc_req_ie_len += ext_capab_len;
 383                 os_memcpy(pos, ext_capab, ext_capab_len);
 384         }
 385
 386 #ifdef CONFIG_SAE
 387         if (params.auth_alg == WPA_AUTH_ALG_SAE) {
 388                 if (start)
 389                         resp = sme_auth_build_sae_commit(wpa_s, ssid,
 390                                                          bss->bssid);
 391                 else
 392                         resp = sme_auth_build_sae_confirm(wpa_s);
 393                 if (resp == NULL) {
 394                         wpas_connect_work_done(wpa_s);
 395                         return;
 396                 }
 397                 params.sae_data = wpabuf_head(resp);
 398                 params.sae_data_len = wpabuf_len(resp);
 399                 wpa_s->sme.sae.state = start ? SAE_COMMITTED : SAE_CONFIRMED;
 400         }
 401 #endif /* CONFIG_SAE */
 402
 403         wpa_supplicant_cancel_sched_scan(wpa_s);
 404         wpa_supplicant_cancel_scan(wpa_s);
 405
 406         wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
 407                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 408                 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
 409
 410         wpa_clear_keys(wpa_s, bss->bssid);
 411         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 412         old_ssid = wpa_s->current_ssid;
 413         wpa_s->current_ssid = ssid;
 414         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
 415         wpa_supplicant_initiate_eapol(wpa_s);
 416         if (old_ssid != wpa_s->current_ssid)
 417                 wpas_notify_network_changed(wpa_s);
 418
 419         wpa_s->sme.auth_alg = params.auth_alg;
 420         if (wpa_drv_authenticate(wpa_s, &params) < 0) {
 421                 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
 422                         "driver failed");
 423                 wpas_connection_failed(wpa_s, bss->bssid);
 424                 wpa_supplicant_mark_disassoc(wpa_s);
 425                 wpabuf_free(resp);
 426                 wpas_connect_work_done(wpa_s);
 427                 return;
 428         }
 429
 430         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 431                                NULL);
 432
 433         /*
 434          * Association will be started based on the authentication event from
 435          * the driver.
 436          */
 437
 438         wpabuf_free(resp);
 439 }
 440
 441
 442 static void sme_auth_start_cb(struct wpa_radio_work *work, int deinit)
 443 {
 444         struct wpa_connect_work *cwork = work->ctx;
 445         struct wpa_supplicant *wpa_s = work->wpa_s;
 446
 447         if (deinit) {
 448                 if (work->started)
 449                         wpa_s->connect_work = NULL;
 450
 451                 wpas_connect_work_free(cwork);
 452                 return;
 453         }
 454
 455         wpa_s->connect_work = work;
 456
 457         if (!wpas_valid_bss_ssid(wpa_s, cwork->bss, cwork->ssid)) {
 458                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: BSS/SSID entry for authentication not valid anymore - drop connection attempt");
 459                 wpas_connect_work_done(wpa_s);
 460                 return;
 461         }
 462
 463         sme_send_authentication(wpa_s, cwork->bss, cwork->ssid, 1);
 464 }
 465
 466
 467 void sme_authenticate(struct wpa_supplicant *wpa_s,
 468                       struct wpa_bss *bss, struct wpa_ssid *ssid)
 469 {
 470         struct wpa_connect_work *cwork;
 471
 472         if (bss == NULL || ssid == NULL)
 473                 return;
 474         if (wpa_s->connect_work) {
 475                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reject sme_authenticate() call since connect_work exist");
 476                 return;
 477         }
 478
 479         if (radio_work_pending(wpa_s, "sme-connect")) {
 480                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reject sme_authenticate() call since pending work exist");
 481                 return;
 482         }
 483
 484         cwork = os_zalloc(sizeof(*cwork));
 485         if (cwork == NULL)
 486                 return;
 487         cwork->bss = bss;
 488         cwork->ssid = ssid;
 489         cwork->sme = 1;
 490
 491 #ifdef CONFIG_SAE
 492         wpa_s->sme.sae.state = SAE_NOTHING;
 493         wpa_s->sme.sae.send_confirm = 0;
 494         wpa_s->sme.sae_group_index = 0;
 495 #endif /* CONFIG_SAE */
 496
 497         if (radio_add_work(wpa_s, bss->freq, "sme-connect", 1,
 498                            sme_auth_start_cb, cwork) < 0)
 499                 wpas_connect_work_free(cwork);
 500 }
 501
 502
 503 #ifdef CONFIG_SAE
 504
 505 static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
 506                         u16 status_code, const u8 *data, size_t len)
 507 {
 508         wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
 509                 "status code %u", auth_transaction, status_code);
 510
 511         if (auth_transaction == 1 &&
 512             status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
 513             wpa_s->sme.sae.state == SAE_COMMITTED &&
 514             wpa_s->current_bss && wpa_s->current_ssid) {
 515                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE anti-clogging token "
 516                         "requested");
 517                 wpabuf_free(wpa_s->sme.sae_token);
 518                 wpa_s->sme.sae_token = wpabuf_alloc_copy(data, len);
 519                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 520                                         wpa_s->current_ssid, 1);
 521                 return 0;
 522         }
 523
 524         if (auth_transaction == 1 &&
 525             status_code == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED &&
 526             wpa_s->sme.sae.state == SAE_COMMITTED &&
 527             wpa_s->current_bss && wpa_s->current_ssid) {
 528                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE group not supported");
 529                 wpa_s->sme.sae_group_index++;
 530                 if (sme_set_sae_group(wpa_s) < 0)
 531                         return -1; /* no other groups enabled */
 532                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Try next enabled SAE group");
 533                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 534                                         wpa_s->current_ssid, 1);
 535                 return 0;
 536         }
 537
 538         if (status_code != WLAN_STATUS_SUCCESS)
 539                 return -1;
 540
 541         if (auth_transaction == 1) {
 542                 int *groups = wpa_s->conf->sae_groups;
 543
 544                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
 545                 if (wpa_s->current_bss == NULL ||
 546                     wpa_s->current_ssid == NULL)
 547                         return -1;
 548                 if (wpa_s->sme.sae.state != SAE_COMMITTED)
 549                         return -1;
 550                 if (groups && groups[0] <= 0)
 551                         groups = NULL;
 552                 if (sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL,
 553                                      groups) != WLAN_STATUS_SUCCESS)
 554                         return -1;
 555
 556                 if (sae_process_commit(&wpa_s->sme.sae) < 0) {
 557                         wpa_printf(MSG_DEBUG, "SAE: Failed to process peer "
 558                                    "commit");
 559                         return -1;
 560                 }
 561
 562                 wpabuf_free(wpa_s->sme.sae_token);
 563                 wpa_s->sme.sae_token = NULL;
 564                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 565                                         wpa_s->current_ssid, 0);
 566                 return 0;
 567         } else if (auth_transaction == 2) {
 568                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
 569                 if (wpa_s->sme.sae.state != SAE_CONFIRMED)
 570                         return -1;
 571                 if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0)
 572                         return -1;
 573                 wpa_s->sme.sae.state = SAE_ACCEPTED;
 574                 sae_clear_temp_data(&wpa_s->sme.sae);
 575                 return 1;
 576         }
 577
 578         return -1;
 579 }
 580 #endif /* CONFIG_SAE */
 581
 582
 583 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
 584 {
 585         struct wpa_ssid *ssid = wpa_s->current_ssid;
 586
 587         if (ssid == NULL) {
 588                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 589                         "when network is not selected");
 590                 return;
 591         }
 592
 593         if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
 594                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 595                         "when not in authenticating state");
 596                 return;
 597         }
 598
 599         if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
 600                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
 601                         "unexpected peer " MACSTR,
 602                         MAC2STR(data->auth.peer));
 603                 return;
 604         }
 605
 606         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
 607                 " auth_type=%d auth_transaction=%d status_code=%d",
 608                 MAC2STR(data->auth.peer), data->auth.auth_type,
 609                 data->auth.auth_transaction, data->auth.status_code);
 610         wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
 611                     data->auth.ies, data->auth.ies_len);
 612
 613         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 614
 615 #ifdef CONFIG_SAE
 616         if (data->auth.auth_type == WLAN_AUTH_SAE) {
 617                 int res;
 618                 res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
 619                                    data->auth.status_code, data->auth.ies,
 620                                    data->auth.ies_len);
 621                 if (res < 0) {
 622                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 623                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 624
 625                 }
 626                 if (res != 1)
 627                         return;
 628
 629                 wpa_printf(MSG_DEBUG, "SME: SAE completed - setting PMK for "
 630                            "4-way handshake");
 631                 wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN);
 632         }
 633 #endif /* CONFIG_SAE */
 634
 635         if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
 636                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
 637                         "code %d)", data->auth.status_code);
 638
 639                 if (data->auth.status_code !=
 640                     WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
 641                     wpa_s->sme.auth_alg == data->auth.auth_type ||
 642                     wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
 643                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 644                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 645                         return;
 646                 }
 647
 648                 wpas_connect_work_done(wpa_s);
 649
 650                 switch (data->auth.auth_type) {
 651                 case WLAN_AUTH_OPEN:
 652                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 653
 654                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
 655                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 656                                                  wpa_s->current_ssid);
 657                         return;
 658
 659                 case WLAN_AUTH_SHARED_KEY:
 660                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
 661
 662                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
 663                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 664                                                  wpa_s->current_ssid);
 665                         return;
 666
 667                 default:
 668                         return;
 669                 }
 670         }
 671
 672 #ifdef CONFIG_IEEE80211R
 673         if (data->auth.auth_type == WLAN_AUTH_FT) {
 674                 union wpa_event_data edata;
 675                 os_memset(&edata, 0, sizeof(edata));
 676                 edata.ft_ies.ies = data->auth.ies;
 677                 edata.ft_ies.ies_len = data->auth.ies_len;
 678                 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
 679                 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
 680         }
 681 #endif /* CONFIG_IEEE80211R */
 682
 683         sme_associate(wpa_s, ssid->mode, data->auth.peer,
 684                       data->auth.auth_type);
 685 }
 686
 687
 688 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
 689                    const u8 *bssid, u16 auth_type)
 690 {
 691         struct wpa_driver_associate_params params;
 692         struct ieee802_11_elems elems;
 693 #ifdef CONFIG_HT_OVERRIDES
 694         struct ieee80211_ht_capabilities htcaps;
 695         struct ieee80211_ht_capabilities htcaps_mask;
 696 #endif /* CONFIG_HT_OVERRIDES */
 697 #ifdef CONFIG_VHT_OVERRIDES
 698         struct ieee80211_vht_capabilities vhtcaps;
 699         struct ieee80211_vht_capabilities vhtcaps_mask;
 700 #endif /* CONFIG_VHT_OVERRIDES */
 701
 702         os_memset(&params, 0, sizeof(params));
 703         params.bssid = bssid;
 704         params.ssid = wpa_s->sme.ssid;
 705         params.ssid_len = wpa_s->sme.ssid_len;
 706         params.freq = wpa_s->sme.freq;
 707         params.bg_scan_period = wpa_s->current_ssid ?
 708                 wpa_s->current_ssid->bg_scan_period : -1;
 709         params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
 710                 wpa_s->sme.assoc_req_ie : NULL;
 711         params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
 712         params.pairwise_suite = wpa_s->pairwise_cipher;
 713         params.group_suite = wpa_s->group_cipher;
 714 #ifdef CONFIG_HT_OVERRIDES
 715         os_memset(&htcaps, 0, sizeof(htcaps));
 716         os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
 717         params.htcaps = (u8 *) &htcaps;
 718         params.htcaps_mask = (u8 *) &htcaps_mask;
 719         wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, &params);
 720 #endif /* CONFIG_HT_OVERRIDES */
 721 #ifdef CONFIG_VHT_OVERRIDES
 722         os_memset(&vhtcaps, 0, sizeof(vhtcaps));
 723         os_memset(&vhtcaps_mask, 0, sizeof(vhtcaps_mask));
 724         params.vhtcaps = &vhtcaps;
 725         params.vhtcaps_mask = &vhtcaps_mask;
 726         wpa_supplicant_apply_vht_overrides(wpa_s, wpa_s->current_ssid, &params);
 727 #endif /* CONFIG_VHT_OVERRIDES */
 728 #ifdef CONFIG_IEEE80211R
 729         if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
 730                 params.wpa_ie = wpa_s->sme.ft_ies;
 731                 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
 732         }
 733 #endif /* CONFIG_IEEE80211R */
 734         params.mode = mode;
 735         params.mgmt_frame_protection = wpa_s->sme.mfp;
 736         if (wpa_s->sme.prev_bssid_set)
 737                 params.prev_bssid = wpa_s->sme.prev_bssid;
 738
 739         wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
 740                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 741                 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
 742                 params.freq);
 743
 744         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
 745
 746         if (params.wpa_ie == NULL ||
 747             ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
 748             < 0) {
 749                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
 750                 os_memset(&elems, 0, sizeof(elems));
 751         }
 752         if (elems.rsn_ie) {
 753                 params.wpa_proto = WPA_PROTO_RSN;
 754                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
 755                                         elems.rsn_ie_len + 2);
 756         } else if (elems.wpa_ie) {
 757                 params.wpa_proto = WPA_PROTO_WPA;
 758                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
 759                                         elems.wpa_ie_len + 2);
 760         } else
 761                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 762         if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
 763                 params.p2p = 1;
 764
 765         if (wpa_s->parent->set_sta_uapsd)
 766                 params.uapsd = wpa_s->parent->sta_uapsd;
 767         else
 768                 params.uapsd = -1;
 769
 770         if (wpa_drv_associate(wpa_s, &params) < 0) {
 771                 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
 772                         "driver failed");
 773                 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 774                 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 775                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 776                 return;
 777         }
 778
 779         eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
 780                                NULL);
 781 }
 782
 783
 784 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
 785                       const u8 *ies, size_t ies_len)
 786 {
 787         if (md == NULL || ies == NULL) {
 788                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
 789                 os_free(wpa_s->sme.ft_ies);
 790                 wpa_s->sme.ft_ies = NULL;
 791                 wpa_s->sme.ft_ies_len = 0;
 792                 wpa_s->sme.ft_used = 0;
 793                 return 0;
 794         }
 795
 796         os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
 797         wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
 798         os_free(wpa_s->sme.ft_ies);
 799         wpa_s->sme.ft_ies = os_malloc(ies_len);
 800         if (wpa_s->sme.ft_ies == NULL)
 801                 return -1;
 802         os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
 803         wpa_s->sme.ft_ies_len = ies_len;
 804         return 0;
 805 }
 806
 807
 808 static void sme_deauth(struct wpa_supplicant *wpa_s)
 809 {
 810         int bssid_changed;
 811
 812         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 813
 814         if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
 815                                    WLAN_REASON_DEAUTH_LEAVING) < 0) {
 816                 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
 817                         "failed");
 818         }
 819         wpa_s->sme.prev_bssid_set = 0;
 820
 821         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 822         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 823         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 824         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 825         if (bssid_changed)
 826                 wpas_notify_bssid_changed(wpa_s);
 827 }
 828
 829
 830 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
 831                             union wpa_event_data *data)
 832 {
 833         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
 834                 "status code %d", MAC2STR(wpa_s->pending_bssid),
 835                 data->assoc_reject.status_code);
 836
 837         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 838
 839         /*
 840          * For now, unconditionally terminate the previous authentication. In
 841          * theory, this should not be needed, but mac80211 gets quite confused
 842          * if the authentication is left pending.. Some roaming cases might
 843          * benefit from using the previous authentication, so this could be
 844          * optimized in the future.
 845          */
 846         sme_deauth(wpa_s);
 847 }
 848
 849
 850 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
 851                               union wpa_event_data *data)
 852 {
 853         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
 854         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 855         wpa_supplicant_mark_disassoc(wpa_s);
 856 }
 857
 858
 859 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
 860                                union wpa_event_data *data)
 861 {
 862         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
 863         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 864         wpa_supplicant_mark_disassoc(wpa_s);
 865 }
 866
 867
 868 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
 869                         struct disassoc_info *info)
 870 {
 871         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
 872         if (wpa_s->sme.prev_bssid_set) {
 873                 /*
 874                  * cfg80211/mac80211 can get into somewhat confused state if
 875                  * the AP only disassociates us and leaves us in authenticated
 876                  * state. For now, force the state to be cleared to avoid
 877                  * confusing errors if we try to associate with the AP again.
 878                  */
 879                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
 880                         "driver state");
 881                 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
 882                                        WLAN_REASON_DEAUTH_LEAVING);
 883         }
 884 }
 885
 886
 887 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
 888 {
 889         struct wpa_supplicant *wpa_s = eloop_ctx;
 890         if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
 891                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
 892                 sme_deauth(wpa_s);
 893         }
 894 }
 895
 896
 897 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
 898 {
 899         struct wpa_supplicant *wpa_s = eloop_ctx;
 900         if (wpa_s->wpa_state == WPA_ASSOCIATING) {
 901                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
 902                 sme_deauth(wpa_s);
 903         }
 904 }
 905
 906
 907 void sme_state_changed(struct wpa_supplicant *wpa_s)
 908 {
 909         /* Make sure timers are cleaned up appropriately. */
 910         if (wpa_s->wpa_state != WPA_ASSOCIATING)
 911                 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 912         if (wpa_s->wpa_state != WPA_AUTHENTICATING)
 913                 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 914 }
 915
 916
 917 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
 918                                        const u8 *prev_pending_bssid)
 919 {
 920         /*
 921          * mac80211-workaround to force deauth on failed auth cmd,
 922          * requires us to remain in authenticating state to allow the
 923          * second authentication attempt to be continued properly.
 924          */
 925         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
 926                 "to proceed after disconnection event");
 927         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 928         os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
 929
 930         /*
 931          * Re-arm authentication timer in case auth fails for whatever reason.
 932          */
 933         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 934         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 935                                NULL);
 936 }
 937
 938
 939 void sme_deinit(struct wpa_supplicant *wpa_s)
 940 {
 941         os_free(wpa_s->sme.ft_ies);
 942         wpa_s->sme.ft_ies = NULL;
 943         wpa_s->sme.ft_ies_len = 0;
 944 #ifdef CONFIG_IEEE80211W
 945         sme_stop_sa_query(wpa_s);
 946 #endif /* CONFIG_IEEE80211W */
 947 #ifdef CONFIG_SAE
 948         wpabuf_free(wpa_s->sme.sae_token);
 949         wpa_s->sme.sae_token = NULL;
 950         sae_clear_data(&wpa_s->sme.sae);
 951 #endif /* CONFIG_SAE */
 952
 953         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 954         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 955         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
 956 }
 957
 958
 959 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
 960                                    const u8 *chan_list, u8 num_channels,
 961                                    u8 num_intol)
 962 {
 963         struct ieee80211_2040_bss_coex_ie *bc_ie;
 964         struct ieee80211_2040_intol_chan_report *ic_report;
 965         struct wpabuf *buf;
 966
 967         wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR,
 968                    MAC2STR(wpa_s->bssid));
 969
 970         buf = wpabuf_alloc(2 + /* action.category + action_code */
 971                            sizeof(struct ieee80211_2040_bss_coex_ie) +
 972                            sizeof(struct ieee80211_2040_intol_chan_report) +
 973                            num_channels);
 974         if (buf == NULL)
 975                 return;
 976
 977         wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
 978         wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
 979
 980         bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
 981         bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
 982         bc_ie->length = 1;
 983         if (num_intol)
 984                 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
 985
 986         if (num_channels > 0) {
 987                 ic_report = wpabuf_put(buf, sizeof(*ic_report));
 988                 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
 989                 ic_report->length = num_channels + 1;
 990                 ic_report->op_class = 0;
 991                 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
 992                           num_channels);
 993         }
 994
 995         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
 996                                 wpa_s->own_addr, wpa_s->bssid,
 997                                 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
 998                 wpa_msg(wpa_s, MSG_INFO,
 999                         "SME: Failed to send 20/40 BSS Coexistence frame");
1000         }
1001
1002         wpabuf_free(buf);
1003 }
1004
1005
1006 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
1007 {
1008         struct wpa_bss *bss;
1009         const u8 *ie;
1010         u16 ht_cap;
1011         u8 chan_list[P2P_MAX_CHANNELS], channel;
1012         u8 num_channels = 0, num_intol = 0, i;
1013
1014         if (!wpa_s->sme.sched_obss_scan)
1015                 return 0;
1016
1017         wpa_s->sme.sched_obss_scan = 0;
1018         if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
1019                 return 1;
1020
1021         /*
1022          * Check whether AP uses regulatory triplet or channel triplet in
1023          * country info. Right now the operating class of the BSS channel
1024          * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
1025          * based on the assumption that operating class triplet is not used in
1026          * beacon frame. If the First Channel Number/Operating Extension
1027          * Identifier octet has a positive integer value of 201 or greater,
1028          * then its operating class triplet.
1029          *
1030          * TODO: If Supported Operating Classes element is present in beacon
1031          * frame, have to lookup operating class in Annex E and fill them in
1032          * 2040 coex frame.
1033          */
1034         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
1035         if (ie && (ie[1] >= 6) && (ie[5] >= 201))
1036                 return 1;
1037
1038         os_memset(chan_list, 0, sizeof(chan_list));
1039
1040         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1041                 /* Skip other band bss */
1042                 enum hostapd_hw_mode mode;
1043                 mode = ieee80211_freq_to_chan(bss->freq, &channel);
1044                 if (mode != HOSTAPD_MODE_IEEE80211G &&
1045                     mode != HOSTAPD_MODE_IEEE80211B)
1046                         continue;
1047
1048                 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
1049                 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
1050
1051                 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
1052                         /* Check whether the channel is already considered */
1053                         for (i = 0; i < num_channels; i++) {
1054                                 if (channel == chan_list[i])
1055                                         break;
1056                         }
1057                         if (i != num_channels)
1058                                 continue;
1059
1060                         if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
1061                                 num_intol++;
1062
1063                         chan_list[num_channels++] = channel;
1064                 }
1065         }
1066
1067         sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
1068         return 1;
1069 }
1070
1071
1072 static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
1073                                           u16 num_modes,
1074                                           enum hostapd_hw_mode mode)
1075 {
1076         u16 i;
1077
1078         for (i = 0; i < num_modes; i++) {
1079                 if (modes[i].mode == mode)
1080                         return &modes[i];
1081         }
1082
1083         return NULL;
1084 }
1085
1086
1087 static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s,
1088                                         enum hostapd_hw_mode band,
1089                                         struct wpa_driver_scan_params *params)
1090 {
1091         /* Include only supported channels for the specified band */
1092         struct hostapd_hw_modes *mode;
1093         int count, i;
1094
1095         mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band);
1096         if (mode == NULL) {
1097                 /* No channels supported in this band - use empty list */
1098                 params->freqs = os_zalloc(sizeof(int));
1099                 return;
1100         }
1101
1102         params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
1103         if (params->freqs == NULL)
1104                 return;
1105         for (count = 0, i = 0; i < mode->num_channels; i++) {
1106                 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
1107                         continue;
1108                 params->freqs[count++] = mode->channels[i].freq;
1109         }
1110 }
1111
1112
1113 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1114 {
1115         struct wpa_supplicant *wpa_s = eloop_ctx;
1116         struct wpa_driver_scan_params params;
1117
1118         if (!wpa_s->current_bss) {
1119                 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
1120                 return;
1121         }
1122
1123         os_memset(&params, 0, sizeof(params));
1124         wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G, &params);
1125         wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
1126
1127         if (wpa_supplicant_trigger_scan(wpa_s, &params))
1128                 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
1129         else
1130                 wpa_s->sme.sched_obss_scan = 1;
1131         os_free(params.freqs);
1132
1133         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1134                                sme_obss_scan_timeout, wpa_s, NULL);
1135 }
1136
1137
1138 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
1139 {
1140         const u8 *ie;
1141         struct wpa_bss *bss = wpa_s->current_bss;
1142         struct wpa_ssid *ssid = wpa_s->current_ssid;
1143         struct hostapd_hw_modes *hw_mode = NULL;
1144         int i;
1145
1146         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1147         wpa_s->sme.sched_obss_scan = 0;
1148         if (!enable)
1149                 return;
1150
1151         /*
1152          * Schedule OBSS scan if driver is using station SME in wpa_supplicant
1153          * or it expects OBSS scan to be performed by wpa_supplicant.
1154          */
1155         if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
1156               (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
1157             ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
1158                 return;
1159
1160         if (!wpa_s->hw.modes)
1161                 return;
1162
1163         /* only HT caps in 11g mode are relevant */
1164         for (i = 0; i < wpa_s->hw.num_modes; i++) {
1165                 hw_mode = &wpa_s->hw.modes[i];
1166                 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
1167                         break;
1168         }
1169
1170         /* Driver does not support HT40 for 11g or doesn't have 11g. */
1171         if (i == wpa_s->hw.num_modes || !hw_mode ||
1172             !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1173                 return;
1174
1175         if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
1176                 return; /* Not associated on 2.4 GHz band */
1177
1178         /* Check whether AP supports HT40 */
1179         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
1180         if (!ie || ie[1] < 2 ||
1181             !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1182                 return; /* AP does not support HT40 */
1183
1184         ie = wpa_bss_get_ie(wpa_s->current_bss,
1185                             WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
1186         if (!ie || ie[1] < 14)
1187                 return; /* AP does not request OBSS scans */
1188
1189         wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
1190         if (wpa_s->sme.obss_scan_int < 10) {
1191                 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
1192                            "replaced with the minimum 10 sec",
1193                            wpa_s->sme.obss_scan_int);
1194                 wpa_s->sme.obss_scan_int = 10;
1195         }
1196         wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
1197                    wpa_s->sme.obss_scan_int);
1198         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1199                                sme_obss_scan_timeout, wpa_s, NULL);
1200 }
1201
1202
1203 #ifdef CONFIG_IEEE80211W
1204
1205 static const unsigned int sa_query_max_timeout = 1000;
1206 static const unsigned int sa_query_retry_timeout = 201;
1207
1208 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
1209 {
1210         u32 tu;
1211         struct os_reltime now, passed;
1212         os_get_reltime(&now);
1213         os_reltime_sub(&now, &wpa_s->sme.sa_query_start, &passed);
1214         tu = (passed.sec * 1000000 + passed.usec) / 1024;
1215         if (sa_query_max_timeout < tu) {
1216                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
1217                 sme_stop_sa_query(wpa_s);
1218                 wpa_supplicant_deauthenticate(
1219                         wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
1220                 return 1;
1221         }
1222
1223         return 0;
1224 }
1225
1226
1227 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
1228                                   const u8 *trans_id)
1229 {
1230         u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
1231         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
1232                 MACSTR, MAC2STR(wpa_s->bssid));
1233         wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
1234                     trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1235         req[0] = WLAN_ACTION_SA_QUERY;
1236         req[1] = WLAN_SA_QUERY_REQUEST;
1237         os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1238         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1239                                 wpa_s->own_addr, wpa_s->bssid,
1240                                 req, sizeof(req), 0) < 0)
1241                 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
1242                         "Request");
1243 }
1244
1245
1246 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
1247 {
1248         struct wpa_supplicant *wpa_s = eloop_ctx;
1249         unsigned int timeout, sec, usec;
1250         u8 *trans_id, *nbuf;
1251
1252         if (wpa_s->sme.sa_query_count > 0 &&
1253             sme_check_sa_query_timeout(wpa_s))
1254                 return;
1255
1256         nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
1257                                 wpa_s->sme.sa_query_count + 1,
1258                                 WLAN_SA_QUERY_TR_ID_LEN);
1259         if (nbuf == NULL)
1260                 return;
1261         if (wpa_s->sme.sa_query_count == 0) {
1262                 /* Starting a new SA Query procedure */
1263                 os_get_reltime(&wpa_s->sme.sa_query_start);
1264         }
1265         trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
1266         wpa_s->sme.sa_query_trans_id = nbuf;
1267         wpa_s->sme.sa_query_count++;
1268
1269         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1270
1271         timeout = sa_query_retry_timeout;
1272         sec = ((timeout / 1000) * 1024) / 1000;
1273         usec = (timeout % 1000) * 1024;
1274         eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
1275
1276         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
1277                 wpa_s->sme.sa_query_count);
1278
1279         sme_send_sa_query_req(wpa_s, trans_id);
1280 }
1281
1282
1283 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
1284 {
1285         sme_sa_query_timer(wpa_s, NULL);
1286 }
1287
1288
1289 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
1290 {
1291         eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
1292         os_free(wpa_s->sme.sa_query_trans_id);
1293         wpa_s->sme.sa_query_trans_id = NULL;
1294         wpa_s->sme.sa_query_count = 0;
1295 }
1296
1297
1298 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1299                                  const u8 *da, u16 reason_code)
1300 {
1301         struct wpa_ssid *ssid;
1302
1303         if (wpa_s->wpa_state != WPA_COMPLETED)
1304                 return;
1305         ssid = wpa_s->current_ssid;
1306         if (ssid == NULL ||
1307             (ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
1308              wpa_s->conf->pmf : ssid->ieee80211w) == NO_MGMT_FRAME_PROTECTION)
1309                 return;
1310         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1311                 return;
1312         if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1313             reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1314                 return;
1315         if (wpa_s->sme.sa_query_count > 0)
1316                 return;
1317
1318         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1319                 "possible AP/STA state mismatch - trigger SA Query");
1320         sme_start_sa_query(wpa_s);
1321 }
1322
1323
1324 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1325                      const u8 *data, size_t len)
1326 {
1327         int i;
1328
1329         if (wpa_s->sme.sa_query_trans_id == NULL ||
1330             len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1331             data[0] != WLAN_SA_QUERY_RESPONSE)
1332                 return;
1333         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1334                 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1335
1336         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1337                 return;
1338
1339         for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1340                 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1341                               i * WLAN_SA_QUERY_TR_ID_LEN,
1342                               data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1343                         break;
1344         }
1345
1346         if (i >= wpa_s->sme.sa_query_count) {
1347                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1348                         "transaction identifier found");
1349                 return;
1350         }
1351
1352         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1353                 "from " MACSTR, MAC2STR(sa));
1354         sme_stop_sa_query(wpa_s);
1355 }
1356
1357 #endif /* CONFIG_IEEE80211W */