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                 /*
 481                  * The previous sme-connect work might no longer be valid due to
 482                  * the fact that the BSS list was updated. In addition, it makes
 483                  * sense to adhere to the 'newer' decision.
 484                  */
 485                 wpa_dbg(wpa_s, MSG_DEBUG,
 486                         "SME: Remove previous pending sme-connect");
 487                 radio_remove_works(wpa_s, "sme-connect", 0);
 488         }
 489
 490         cwork = os_zalloc(sizeof(*cwork));
 491         if (cwork == NULL)
 492                 return;
 493         cwork->bss = bss;
 494         cwork->ssid = ssid;
 495         cwork->sme = 1;
 496
 497 #ifdef CONFIG_SAE
 498         wpa_s->sme.sae.state = SAE_NOTHING;
 499         wpa_s->sme.sae.send_confirm = 0;
 500         wpa_s->sme.sae_group_index = 0;
 501 #endif /* CONFIG_SAE */
 502
 503         if (radio_add_work(wpa_s, bss->freq, "sme-connect", 1,
 504                            sme_auth_start_cb, cwork) < 0)
 505                 wpas_connect_work_free(cwork);
 506 }
 507
 508
 509 #ifdef CONFIG_SAE
 510
 511 static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
 512                         u16 status_code, const u8 *data, size_t len)
 513 {
 514         wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
 515                 "status code %u", auth_transaction, status_code);
 516
 517         if (auth_transaction == 1 &&
 518             status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
 519             wpa_s->sme.sae.state == SAE_COMMITTED &&
 520             wpa_s->current_bss && wpa_s->current_ssid) {
 521                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE anti-clogging token "
 522                         "requested");
 523                 wpabuf_free(wpa_s->sme.sae_token);
 524                 wpa_s->sme.sae_token = wpabuf_alloc_copy(data, len);
 525                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 526                                         wpa_s->current_ssid, 1);
 527                 return 0;
 528         }
 529
 530         if (auth_transaction == 1 &&
 531             status_code == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED &&
 532             wpa_s->sme.sae.state == SAE_COMMITTED &&
 533             wpa_s->current_bss && wpa_s->current_ssid) {
 534                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE group not supported");
 535                 wpa_s->sme.sae_group_index++;
 536                 if (sme_set_sae_group(wpa_s) < 0)
 537                         return -1; /* no other groups enabled */
 538                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Try next enabled SAE group");
 539                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 540                                         wpa_s->current_ssid, 1);
 541                 return 0;
 542         }
 543
 544         if (status_code != WLAN_STATUS_SUCCESS)
 545                 return -1;
 546
 547         if (auth_transaction == 1) {
 548                 int *groups = wpa_s->conf->sae_groups;
 549
 550                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
 551                 if (wpa_s->current_bss == NULL ||
 552                     wpa_s->current_ssid == NULL)
 553                         return -1;
 554                 if (wpa_s->sme.sae.state != SAE_COMMITTED)
 555                         return -1;
 556                 if (groups && groups[0] <= 0)
 557                         groups = NULL;
 558                 if (sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL,
 559                                      groups) != WLAN_STATUS_SUCCESS)
 560                         return -1;
 561
 562                 if (sae_process_commit(&wpa_s->sme.sae) < 0) {
 563                         wpa_printf(MSG_DEBUG, "SAE: Failed to process peer "
 564                                    "commit");
 565                         return -1;
 566                 }
 567
 568                 wpabuf_free(wpa_s->sme.sae_token);
 569                 wpa_s->sme.sae_token = NULL;
 570                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 571                                         wpa_s->current_ssid, 0);
 572                 return 0;
 573         } else if (auth_transaction == 2) {
 574                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
 575                 if (wpa_s->sme.sae.state != SAE_CONFIRMED)
 576                         return -1;
 577                 if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0)
 578                         return -1;
 579                 wpa_s->sme.sae.state = SAE_ACCEPTED;
 580                 sae_clear_temp_data(&wpa_s->sme.sae);
 581                 return 1;
 582         }
 583
 584         return -1;
 585 }
 586 #endif /* CONFIG_SAE */
 587
 588
 589 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
 590 {
 591         struct wpa_ssid *ssid = wpa_s->current_ssid;
 592
 593         if (ssid == NULL) {
 594                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 595                         "when network is not selected");
 596                 return;
 597         }
 598
 599         if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
 600                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 601                         "when not in authenticating state");
 602                 return;
 603         }
 604
 605         if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
 606                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
 607                         "unexpected peer " MACSTR,
 608                         MAC2STR(data->auth.peer));
 609                 return;
 610         }
 611
 612         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
 613                 " auth_type=%d auth_transaction=%d status_code=%d",
 614                 MAC2STR(data->auth.peer), data->auth.auth_type,
 615                 data->auth.auth_transaction, data->auth.status_code);
 616         wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
 617                     data->auth.ies, data->auth.ies_len);
 618
 619         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 620
 621 #ifdef CONFIG_SAE
 622         if (data->auth.auth_type == WLAN_AUTH_SAE) {
 623                 int res;
 624                 res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
 625                                    data->auth.status_code, data->auth.ies,
 626                                    data->auth.ies_len);
 627                 if (res < 0) {
 628                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 629                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 630
 631                 }
 632                 if (res != 1)
 633                         return;
 634
 635                 wpa_printf(MSG_DEBUG, "SME: SAE completed - setting PMK for "
 636                            "4-way handshake");
 637                 wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN);
 638         }
 639 #endif /* CONFIG_SAE */
 640
 641         if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
 642                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
 643                         "code %d)", data->auth.status_code);
 644
 645                 if (data->auth.status_code !=
 646                     WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
 647                     wpa_s->sme.auth_alg == data->auth.auth_type ||
 648                     wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
 649                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 650                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 651                         return;
 652                 }
 653
 654                 wpas_connect_work_done(wpa_s);
 655
 656                 switch (data->auth.auth_type) {
 657                 case WLAN_AUTH_OPEN:
 658                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 659
 660                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
 661                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 662                                                  wpa_s->current_ssid);
 663                         return;
 664
 665                 case WLAN_AUTH_SHARED_KEY:
 666                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
 667
 668                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
 669                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 670                                                  wpa_s->current_ssid);
 671                         return;
 672
 673                 default:
 674                         return;
 675                 }
 676         }
 677
 678 #ifdef CONFIG_IEEE80211R
 679         if (data->auth.auth_type == WLAN_AUTH_FT) {
 680                 union wpa_event_data edata;
 681                 os_memset(&edata, 0, sizeof(edata));
 682                 edata.ft_ies.ies = data->auth.ies;
 683                 edata.ft_ies.ies_len = data->auth.ies_len;
 684                 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
 685                 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
 686         }
 687 #endif /* CONFIG_IEEE80211R */
 688
 689         sme_associate(wpa_s, ssid->mode, data->auth.peer,
 690                       data->auth.auth_type);
 691 }
 692
 693
 694 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
 695                    const u8 *bssid, u16 auth_type)
 696 {
 697         struct wpa_driver_associate_params params;
 698         struct ieee802_11_elems elems;
 699 #ifdef CONFIG_HT_OVERRIDES
 700         struct ieee80211_ht_capabilities htcaps;
 701         struct ieee80211_ht_capabilities htcaps_mask;
 702 #endif /* CONFIG_HT_OVERRIDES */
 703 #ifdef CONFIG_VHT_OVERRIDES
 704         struct ieee80211_vht_capabilities vhtcaps;
 705         struct ieee80211_vht_capabilities vhtcaps_mask;
 706 #endif /* CONFIG_VHT_OVERRIDES */
 707
 708         os_memset(&params, 0, sizeof(params));
 709         params.bssid = bssid;
 710         params.ssid = wpa_s->sme.ssid;
 711         params.ssid_len = wpa_s->sme.ssid_len;
 712         params.freq = wpa_s->sme.freq;
 713         params.bg_scan_period = wpa_s->current_ssid ?
 714                 wpa_s->current_ssid->bg_scan_period : -1;
 715         params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
 716                 wpa_s->sme.assoc_req_ie : NULL;
 717         params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
 718         params.pairwise_suite = wpa_s->pairwise_cipher;
 719         params.group_suite = wpa_s->group_cipher;
 720         params.key_mgmt_suite = wpa_s->key_mgmt;
 721         params.wpa_proto = wpa_s->wpa_proto;
 722 #ifdef CONFIG_HT_OVERRIDES
 723         os_memset(&htcaps, 0, sizeof(htcaps));
 724         os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
 725         params.htcaps = (u8 *) &htcaps;
 726         params.htcaps_mask = (u8 *) &htcaps_mask;
 727         wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, &params);
 728 #endif /* CONFIG_HT_OVERRIDES */
 729 #ifdef CONFIG_VHT_OVERRIDES
 730         os_memset(&vhtcaps, 0, sizeof(vhtcaps));
 731         os_memset(&vhtcaps_mask, 0, sizeof(vhtcaps_mask));
 732         params.vhtcaps = &vhtcaps;
 733         params.vhtcaps_mask = &vhtcaps_mask;
 734         wpa_supplicant_apply_vht_overrides(wpa_s, wpa_s->current_ssid, &params);
 735 #endif /* CONFIG_VHT_OVERRIDES */
 736 #ifdef CONFIG_IEEE80211R
 737         if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
 738                 params.wpa_ie = wpa_s->sme.ft_ies;
 739                 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
 740         }
 741 #endif /* CONFIG_IEEE80211R */
 742         params.mode = mode;
 743         params.mgmt_frame_protection = wpa_s->sme.mfp;
 744         if (wpa_s->sme.prev_bssid_set)
 745                 params.prev_bssid = wpa_s->sme.prev_bssid;
 746
 747         wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
 748                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 749                 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
 750                 params.freq);
 751
 752         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
 753
 754         if (params.wpa_ie == NULL ||
 755             ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
 756             < 0) {
 757                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
 758                 os_memset(&elems, 0, sizeof(elems));
 759         }
 760         if (elems.rsn_ie) {
 761                 params.wpa_proto = WPA_PROTO_RSN;
 762                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
 763                                         elems.rsn_ie_len + 2);
 764         } else if (elems.wpa_ie) {
 765                 params.wpa_proto = WPA_PROTO_WPA;
 766                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
 767                                         elems.wpa_ie_len + 2);
 768         } else if (elems.osen) {
 769                 params.wpa_proto = WPA_PROTO_OSEN;
 770                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.osen - 2,
 771                                         elems.osen_len + 2);
 772         } else
 773                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 774         if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
 775                 params.p2p = 1;
 776
 777         if (wpa_s->parent->set_sta_uapsd)
 778                 params.uapsd = wpa_s->parent->sta_uapsd;
 779         else
 780                 params.uapsd = -1;
 781
 782         if (wpa_drv_associate(wpa_s, &params) < 0) {
 783                 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
 784                         "driver failed");
 785                 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 786                 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 787                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 788                 return;
 789         }
 790
 791         eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
 792                                NULL);
 793 }
 794
 795
 796 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
 797                       const u8 *ies, size_t ies_len)
 798 {
 799         if (md == NULL || ies == NULL) {
 800                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
 801                 os_free(wpa_s->sme.ft_ies);
 802                 wpa_s->sme.ft_ies = NULL;
 803                 wpa_s->sme.ft_ies_len = 0;
 804                 wpa_s->sme.ft_used = 0;
 805                 return 0;
 806         }
 807
 808         os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
 809         wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
 810         os_free(wpa_s->sme.ft_ies);
 811         wpa_s->sme.ft_ies = os_malloc(ies_len);
 812         if (wpa_s->sme.ft_ies == NULL)
 813                 return -1;
 814         os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
 815         wpa_s->sme.ft_ies_len = ies_len;
 816         return 0;
 817 }
 818
 819
 820 static void sme_deauth(struct wpa_supplicant *wpa_s)
 821 {
 822         int bssid_changed;
 823
 824         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 825
 826         if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
 827                                    WLAN_REASON_DEAUTH_LEAVING) < 0) {
 828                 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
 829                         "failed");
 830         }
 831         wpa_s->sme.prev_bssid_set = 0;
 832
 833         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 834         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 835         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 836         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 837         if (bssid_changed)
 838                 wpas_notify_bssid_changed(wpa_s);
 839 }
 840
 841
 842 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
 843                             union wpa_event_data *data)
 844 {
 845         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
 846                 "status code %d", MAC2STR(wpa_s->pending_bssid),
 847                 data->assoc_reject.status_code);
 848
 849         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 850
 851         /*
 852          * For now, unconditionally terminate the previous authentication. In
 853          * theory, this should not be needed, but mac80211 gets quite confused
 854          * if the authentication is left pending.. Some roaming cases might
 855          * benefit from using the previous authentication, so this could be
 856          * optimized in the future.
 857          */
 858         sme_deauth(wpa_s);
 859 }
 860
 861
 862 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
 863                               union wpa_event_data *data)
 864 {
 865         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
 866         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 867         wpa_supplicant_mark_disassoc(wpa_s);
 868 }
 869
 870
 871 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
 872                                union wpa_event_data *data)
 873 {
 874         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
 875         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 876         wpa_supplicant_mark_disassoc(wpa_s);
 877 }
 878
 879
 880 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
 881                         struct disassoc_info *info)
 882 {
 883         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
 884         if (wpa_s->sme.prev_bssid_set) {
 885                 /*
 886                  * cfg80211/mac80211 can get into somewhat confused state if
 887                  * the AP only disassociates us and leaves us in authenticated
 888                  * state. For now, force the state to be cleared to avoid
 889                  * confusing errors if we try to associate with the AP again.
 890                  */
 891                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
 892                         "driver state");
 893                 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
 894                                        WLAN_REASON_DEAUTH_LEAVING);
 895         }
 896 }
 897
 898
 899 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
 900 {
 901         struct wpa_supplicant *wpa_s = eloop_ctx;
 902         if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
 903                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
 904                 sme_deauth(wpa_s);
 905         }
 906 }
 907
 908
 909 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
 910 {
 911         struct wpa_supplicant *wpa_s = eloop_ctx;
 912         if (wpa_s->wpa_state == WPA_ASSOCIATING) {
 913                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
 914                 sme_deauth(wpa_s);
 915         }
 916 }
 917
 918
 919 void sme_state_changed(struct wpa_supplicant *wpa_s)
 920 {
 921         /* Make sure timers are cleaned up appropriately. */
 922         if (wpa_s->wpa_state != WPA_ASSOCIATING)
 923                 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 924         if (wpa_s->wpa_state != WPA_AUTHENTICATING)
 925                 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 926 }
 927
 928
 929 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
 930                                        const u8 *prev_pending_bssid)
 931 {
 932         /*
 933          * mac80211-workaround to force deauth on failed auth cmd,
 934          * requires us to remain in authenticating state to allow the
 935          * second authentication attempt to be continued properly.
 936          */
 937         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
 938                 "to proceed after disconnection event");
 939         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 940         os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
 941
 942         /*
 943          * Re-arm authentication timer in case auth fails for whatever reason.
 944          */
 945         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 946         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 947                                NULL);
 948 }
 949
 950
 951 void sme_deinit(struct wpa_supplicant *wpa_s)
 952 {
 953         os_free(wpa_s->sme.ft_ies);
 954         wpa_s->sme.ft_ies = NULL;
 955         wpa_s->sme.ft_ies_len = 0;
 956 #ifdef CONFIG_IEEE80211W
 957         sme_stop_sa_query(wpa_s);
 958 #endif /* CONFIG_IEEE80211W */
 959 #ifdef CONFIG_SAE
 960         wpabuf_free(wpa_s->sme.sae_token);
 961         wpa_s->sme.sae_token = NULL;
 962         sae_clear_data(&wpa_s->sme.sae);
 963 #endif /* CONFIG_SAE */
 964
 965         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 966         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 967         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
 968 }
 969
 970
 971 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
 972                                    const u8 *chan_list, u8 num_channels,
 973                                    u8 num_intol)
 974 {
 975         struct ieee80211_2040_bss_coex_ie *bc_ie;
 976         struct ieee80211_2040_intol_chan_report *ic_report;
 977         struct wpabuf *buf;
 978
 979         wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR
 980                    " (num_channels=%u num_intol=%u)",
 981                    MAC2STR(wpa_s->bssid), num_channels, num_intol);
 982         wpa_hexdump(MSG_DEBUG, "SME: 20/40 BSS Intolerant Channels",
 983                     chan_list, num_channels);
 984
 985         buf = wpabuf_alloc(2 + /* action.category + action_code */
 986                            sizeof(struct ieee80211_2040_bss_coex_ie) +
 987                            sizeof(struct ieee80211_2040_intol_chan_report) +
 988                            num_channels);
 989         if (buf == NULL)
 990                 return;
 991
 992         wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
 993         wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
 994
 995         bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
 996         bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
 997         bc_ie->length = 1;
 998         if (num_intol)
 999                 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
1000
1001         if (num_channels > 0) {
1002                 ic_report = wpabuf_put(buf, sizeof(*ic_report));
1003                 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
1004                 ic_report->length = num_channels + 1;
1005                 ic_report->op_class = 0;
1006                 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
1007                           num_channels);
1008         }
1009
1010         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1011                                 wpa_s->own_addr, wpa_s->bssid,
1012                                 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
1013                 wpa_msg(wpa_s, MSG_INFO,
1014                         "SME: Failed to send 20/40 BSS Coexistence frame");
1015         }
1016
1017         wpabuf_free(buf);
1018 }
1019
1020
1021 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
1022 {
1023         struct wpa_bss *bss;
1024         const u8 *ie;
1025         u16 ht_cap;
1026         u8 chan_list[P2P_MAX_CHANNELS], channel;
1027         u8 num_channels = 0, num_intol = 0, i;
1028
1029         if (!wpa_s->sme.sched_obss_scan)
1030                 return 0;
1031
1032         wpa_s->sme.sched_obss_scan = 0;
1033         if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
1034                 return 1;
1035
1036         /*
1037          * Check whether AP uses regulatory triplet or channel triplet in
1038          * country info. Right now the operating class of the BSS channel
1039          * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
1040          * based on the assumption that operating class triplet is not used in
1041          * beacon frame. If the First Channel Number/Operating Extension
1042          * Identifier octet has a positive integer value of 201 or greater,
1043          * then its operating class triplet.
1044          *
1045          * TODO: If Supported Operating Classes element is present in beacon
1046          * frame, have to lookup operating class in Annex E and fill them in
1047          * 2040 coex frame.
1048          */
1049         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
1050         if (ie && (ie[1] >= 6) && (ie[5] >= 201))
1051                 return 1;
1052
1053         os_memset(chan_list, 0, sizeof(chan_list));
1054
1055         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1056                 /* Skip other band bss */
1057                 enum hostapd_hw_mode mode;
1058                 mode = ieee80211_freq_to_chan(bss->freq, &channel);
1059                 if (mode != HOSTAPD_MODE_IEEE80211G &&
1060                     mode != HOSTAPD_MODE_IEEE80211B)
1061                         continue;
1062
1063                 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
1064                 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
1065                 wpa_printf(MSG_DEBUG, "SME OBSS scan BSS " MACSTR
1066                            " freq=%u chan=%u ht_cap=0x%x",
1067                            MAC2STR(bss->bssid), bss->freq, channel, ht_cap);
1068
1069                 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
1070                         if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
1071                                 num_intol++;
1072
1073                         /* Check whether the channel is already considered */
1074                         for (i = 0; i < num_channels; i++) {
1075                                 if (channel == chan_list[i])
1076                                         break;
1077                         }
1078                         if (i != num_channels)
1079                                 continue;
1080
1081                         chan_list[num_channels++] = channel;
1082                 }
1083         }
1084
1085         sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
1086         return 1;
1087 }
1088
1089
1090 static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
1091                                           u16 num_modes,
1092                                           enum hostapd_hw_mode mode)
1093 {
1094         u16 i;
1095
1096         for (i = 0; i < num_modes; i++) {
1097                 if (modes[i].mode == mode)
1098                         return &modes[i];
1099         }
1100
1101         return NULL;
1102 }
1103
1104
1105 static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s,
1106                                         enum hostapd_hw_mode band,
1107                                         struct wpa_driver_scan_params *params)
1108 {
1109         /* Include only supported channels for the specified band */
1110         struct hostapd_hw_modes *mode;
1111         int count, i;
1112
1113         mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band);
1114         if (mode == NULL) {
1115                 /* No channels supported in this band - use empty list */
1116                 params->freqs = os_zalloc(sizeof(int));
1117                 return;
1118         }
1119
1120         params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
1121         if (params->freqs == NULL)
1122                 return;
1123         for (count = 0, i = 0; i < mode->num_channels; i++) {
1124                 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
1125                         continue;
1126                 params->freqs[count++] = mode->channels[i].freq;
1127         }
1128 }
1129
1130
1131 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1132 {
1133         struct wpa_supplicant *wpa_s = eloop_ctx;
1134         struct wpa_driver_scan_params params;
1135
1136         if (!wpa_s->current_bss) {
1137                 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
1138                 return;
1139         }
1140
1141         os_memset(&params, 0, sizeof(params));
1142         wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G, &params);
1143         wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
1144
1145         if (wpa_supplicant_trigger_scan(wpa_s, &params))
1146                 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
1147         else
1148                 wpa_s->sme.sched_obss_scan = 1;
1149         os_free(params.freqs);
1150
1151         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1152                                sme_obss_scan_timeout, wpa_s, NULL);
1153 }
1154
1155
1156 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
1157 {
1158         const u8 *ie;
1159         struct wpa_bss *bss = wpa_s->current_bss;
1160         struct wpa_ssid *ssid = wpa_s->current_ssid;
1161         struct hostapd_hw_modes *hw_mode = NULL;
1162         int i;
1163
1164         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1165         wpa_s->sme.sched_obss_scan = 0;
1166         if (!enable)
1167                 return;
1168
1169         /*
1170          * Schedule OBSS scan if driver is using station SME in wpa_supplicant
1171          * or it expects OBSS scan to be performed by wpa_supplicant.
1172          */
1173         if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
1174               (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
1175             ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
1176                 return;
1177
1178         if (!wpa_s->hw.modes)
1179                 return;
1180
1181         /* only HT caps in 11g mode are relevant */
1182         for (i = 0; i < wpa_s->hw.num_modes; i++) {
1183                 hw_mode = &wpa_s->hw.modes[i];
1184                 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
1185                         break;
1186         }
1187
1188         /* Driver does not support HT40 for 11g or doesn't have 11g. */
1189         if (i == wpa_s->hw.num_modes || !hw_mode ||
1190             !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1191                 return;
1192
1193         if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
1194                 return; /* Not associated on 2.4 GHz band */
1195
1196         /* Check whether AP supports HT40 */
1197         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
1198         if (!ie || ie[1] < 2 ||
1199             !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1200                 return; /* AP does not support HT40 */
1201
1202         ie = wpa_bss_get_ie(wpa_s->current_bss,
1203                             WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
1204         if (!ie || ie[1] < 14)
1205                 return; /* AP does not request OBSS scans */
1206
1207         wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
1208         if (wpa_s->sme.obss_scan_int < 10) {
1209                 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
1210                            "replaced with the minimum 10 sec",
1211                            wpa_s->sme.obss_scan_int);
1212                 wpa_s->sme.obss_scan_int = 10;
1213         }
1214         wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
1215                    wpa_s->sme.obss_scan_int);
1216         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1217                                sme_obss_scan_timeout, wpa_s, NULL);
1218 }
1219
1220
1221 #ifdef CONFIG_IEEE80211W
1222
1223 static const unsigned int sa_query_max_timeout = 1000;
1224 static const unsigned int sa_query_retry_timeout = 201;
1225
1226 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
1227 {
1228         u32 tu;
1229         struct os_reltime now, passed;
1230         os_get_reltime(&now);
1231         os_reltime_sub(&now, &wpa_s->sme.sa_query_start, &passed);
1232         tu = (passed.sec * 1000000 + passed.usec) / 1024;
1233         if (sa_query_max_timeout < tu) {
1234                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
1235                 sme_stop_sa_query(wpa_s);
1236                 wpa_supplicant_deauthenticate(
1237                         wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
1238                 return 1;
1239         }
1240
1241         return 0;
1242 }
1243
1244
1245 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
1246                                   const u8 *trans_id)
1247 {
1248         u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
1249         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
1250                 MACSTR, MAC2STR(wpa_s->bssid));
1251         wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
1252                     trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1253         req[0] = WLAN_ACTION_SA_QUERY;
1254         req[1] = WLAN_SA_QUERY_REQUEST;
1255         os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1256         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1257                                 wpa_s->own_addr, wpa_s->bssid,
1258                                 req, sizeof(req), 0) < 0)
1259                 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
1260                         "Request");
1261 }
1262
1263
1264 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
1265 {
1266         struct wpa_supplicant *wpa_s = eloop_ctx;
1267         unsigned int timeout, sec, usec;
1268         u8 *trans_id, *nbuf;
1269
1270         if (wpa_s->sme.sa_query_count > 0 &&
1271             sme_check_sa_query_timeout(wpa_s))
1272                 return;
1273
1274         nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
1275                                 wpa_s->sme.sa_query_count + 1,
1276                                 WLAN_SA_QUERY_TR_ID_LEN);
1277         if (nbuf == NULL)
1278                 return;
1279         if (wpa_s->sme.sa_query_count == 0) {
1280                 /* Starting a new SA Query procedure */
1281                 os_get_reltime(&wpa_s->sme.sa_query_start);
1282         }
1283         trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
1284         wpa_s->sme.sa_query_trans_id = nbuf;
1285         wpa_s->sme.sa_query_count++;
1286
1287         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1288
1289         timeout = sa_query_retry_timeout;
1290         sec = ((timeout / 1000) * 1024) / 1000;
1291         usec = (timeout % 1000) * 1024;
1292         eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
1293
1294         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
1295                 wpa_s->sme.sa_query_count);
1296
1297         sme_send_sa_query_req(wpa_s, trans_id);
1298 }
1299
1300
1301 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
1302 {
1303         sme_sa_query_timer(wpa_s, NULL);
1304 }
1305
1306
1307 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
1308 {
1309         eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
1310         os_free(wpa_s->sme.sa_query_trans_id);
1311         wpa_s->sme.sa_query_trans_id = NULL;
1312         wpa_s->sme.sa_query_count = 0;
1313 }
1314
1315
1316 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1317                                  const u8 *da, u16 reason_code)
1318 {
1319         struct wpa_ssid *ssid;
1320
1321         if (wpa_s->wpa_state != WPA_COMPLETED)
1322                 return;
1323         ssid = wpa_s->current_ssid;
1324         if (ssid == NULL ||
1325             (ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
1326              wpa_s->conf->pmf : ssid->ieee80211w) == NO_MGMT_FRAME_PROTECTION)
1327                 return;
1328         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1329                 return;
1330         if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1331             reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1332                 return;
1333         if (wpa_s->sme.sa_query_count > 0)
1334                 return;
1335
1336         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1337                 "possible AP/STA state mismatch - trigger SA Query");
1338         sme_start_sa_query(wpa_s);
1339 }
1340
1341
1342 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1343                      const u8 *data, size_t len)
1344 {
1345         int i;
1346
1347         if (wpa_s->sme.sa_query_trans_id == NULL ||
1348             len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1349             data[0] != WLAN_SA_QUERY_RESPONSE)
1350                 return;
1351         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1352                 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1353
1354         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1355                 return;
1356
1357         for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1358                 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1359                               i * WLAN_SA_QUERY_TR_ID_LEN,
1360                               data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1361                         break;
1362         }
1363
1364         if (i >= wpa_s->sme.sa_query_count) {
1365                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1366                         "transaction identifier found");
1367                 return;
1368         }
1369
1370         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1371                 "from " MACSTR, MAC2STR(sa));
1372         sme_stop_sa_query(wpa_s);
1373 }
1374
1375 #endif /* CONFIG_IEEE80211W */