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[18];
 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                         size_t len;
 365
 366                         wpas_hs20_add_indication(hs20, pps_mo_id);
 367                         len = sizeof(wpa_s->sme.assoc_req_ie) -
 368                                 wpa_s->sme.assoc_req_ie_len;
 369                         if (wpabuf_len(hs20) <= len) {
 370                                 os_memcpy(wpa_s->sme.assoc_req_ie +
 371                                           wpa_s->sme.assoc_req_ie_len,
 372                                           wpabuf_head(hs20), wpabuf_len(hs20));
 373                                 wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
 374                         }
 375                         wpabuf_free(hs20);
 376                 }
 377         }
 378 #endif /* CONFIG_HS20 */
 379
 380         ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab,
 381                                              sizeof(ext_capab));
 382         if (ext_capab_len > 0) {
 383                 u8 *pos = wpa_s->sme.assoc_req_ie;
 384                 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
 385                         pos += 2 + pos[1];
 386                 os_memmove(pos + ext_capab_len, pos,
 387                            wpa_s->sme.assoc_req_ie_len -
 388                            (pos - wpa_s->sme.assoc_req_ie));
 389                 wpa_s->sme.assoc_req_ie_len += ext_capab_len;
 390                 os_memcpy(pos, ext_capab, ext_capab_len);
 391         }
 392
 393 #ifdef CONFIG_SAE
 394         if (params.auth_alg == WPA_AUTH_ALG_SAE) {
 395                 if (start)
 396                         resp = sme_auth_build_sae_commit(wpa_s, ssid,
 397                                                          bss->bssid);
 398                 else
 399                         resp = sme_auth_build_sae_confirm(wpa_s);
 400                 if (resp == NULL) {
 401                         wpas_connect_work_done(wpa_s);
 402                         return;
 403                 }
 404                 params.sae_data = wpabuf_head(resp);
 405                 params.sae_data_len = wpabuf_len(resp);
 406                 wpa_s->sme.sae.state = start ? SAE_COMMITTED : SAE_CONFIRMED;
 407         }
 408 #endif /* CONFIG_SAE */
 409
 410         wpa_supplicant_cancel_sched_scan(wpa_s);
 411         wpa_supplicant_cancel_scan(wpa_s);
 412
 413         wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
 414                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 415                 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
 416
 417         wpa_clear_keys(wpa_s, bss->bssid);
 418         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 419         old_ssid = wpa_s->current_ssid;
 420         wpa_s->current_ssid = ssid;
 421         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
 422         wpa_supplicant_initiate_eapol(wpa_s);
 423         if (old_ssid != wpa_s->current_ssid)
 424                 wpas_notify_network_changed(wpa_s);
 425
 426 #ifdef CONFIG_P2P
 427         /*
 428          * If multi-channel concurrency is not supported, check for any
 429          * frequency conflict. In case of any frequency conflict, remove the
 430          * least prioritized connection.
 431          */
 432         if (wpa_s->num_multichan_concurrent < 2) {
 433                 int freq, num;
 434                 num = get_shared_radio_freqs(wpa_s, &freq, 1);
 435                 if (num > 0 && freq > 0 && freq != params.freq) {
 436                         wpa_printf(MSG_DEBUG,
 437                                    "Conflicting frequency found (%d != %d)",
 438                                    freq, params.freq);
 439                         if (wpas_p2p_handle_frequency_conflicts(wpa_s,
 440                                                                 params.freq,
 441                                                                 ssid) < 0) {
 442                                 wpas_connection_failed(wpa_s, bss->bssid);
 443                                 wpa_supplicant_mark_disassoc(wpa_s);
 444                                 wpabuf_free(resp);
 445                                 wpas_connect_work_done(wpa_s);
 446                                 return;
 447                         }
 448                 }
 449         }
 450 #endif /* CONFIG_P2P */
 451
 452         wpa_s->sme.auth_alg = params.auth_alg;
 453         if (wpa_drv_authenticate(wpa_s, &params) < 0) {
 454                 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
 455                         "driver failed");
 456                 wpas_connection_failed(wpa_s, bss->bssid);
 457                 wpa_supplicant_mark_disassoc(wpa_s);
 458                 wpabuf_free(resp);
 459                 wpas_connect_work_done(wpa_s);
 460                 return;
 461         }
 462
 463         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 464                                NULL);
 465
 466         /*
 467          * Association will be started based on the authentication event from
 468          * the driver.
 469          */
 470
 471         wpabuf_free(resp);
 472 }
 473
 474
 475 static void sme_auth_start_cb(struct wpa_radio_work *work, int deinit)
 476 {
 477         struct wpa_connect_work *cwork = work->ctx;
 478         struct wpa_supplicant *wpa_s = work->wpa_s;
 479
 480         if (deinit) {
 481                 if (work->started)
 482                         wpa_s->connect_work = NULL;
 483
 484                 wpas_connect_work_free(cwork);
 485                 return;
 486         }
 487
 488         wpa_s->connect_work = work;
 489
 490         if (!wpas_valid_bss_ssid(wpa_s, cwork->bss, cwork->ssid)) {
 491                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: BSS/SSID entry for authentication not valid anymore - drop connection attempt");
 492                 wpas_connect_work_done(wpa_s);
 493                 return;
 494         }
 495
 496         sme_send_authentication(wpa_s, cwork->bss, cwork->ssid, 1);
 497 }
 498
 499
 500 void sme_authenticate(struct wpa_supplicant *wpa_s,
 501                       struct wpa_bss *bss, struct wpa_ssid *ssid)
 502 {
 503         struct wpa_connect_work *cwork;
 504
 505         if (bss == NULL || ssid == NULL)
 506                 return;
 507         if (wpa_s->connect_work) {
 508                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reject sme_authenticate() call since connect_work exist");
 509                 return;
 510         }
 511
 512         if (radio_work_pending(wpa_s, "sme-connect")) {
 513                 /*
 514                  * The previous sme-connect work might no longer be valid due to
 515                  * the fact that the BSS list was updated. In addition, it makes
 516                  * sense to adhere to the 'newer' decision.
 517                  */
 518                 wpa_dbg(wpa_s, MSG_DEBUG,
 519                         "SME: Remove previous pending sme-connect");
 520                 radio_remove_works(wpa_s, "sme-connect", 0);
 521         }
 522
 523         cwork = os_zalloc(sizeof(*cwork));
 524         if (cwork == NULL)
 525                 return;
 526         cwork->bss = bss;
 527         cwork->ssid = ssid;
 528         cwork->sme = 1;
 529
 530 #ifdef CONFIG_SAE
 531         wpa_s->sme.sae.state = SAE_NOTHING;
 532         wpa_s->sme.sae.send_confirm = 0;
 533         wpa_s->sme.sae_group_index = 0;
 534 #endif /* CONFIG_SAE */
 535
 536         if (radio_add_work(wpa_s, bss->freq, "sme-connect", 1,
 537                            sme_auth_start_cb, cwork) < 0)
 538                 wpas_connect_work_free(cwork);
 539 }
 540
 541
 542 #ifdef CONFIG_SAE
 543
 544 static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
 545                         u16 status_code, const u8 *data, size_t len)
 546 {
 547         wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
 548                 "status code %u", auth_transaction, status_code);
 549
 550         if (auth_transaction == 1 &&
 551             status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
 552             wpa_s->sme.sae.state == SAE_COMMITTED &&
 553             wpa_s->current_bss && wpa_s->current_ssid) {
 554                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE anti-clogging token "
 555                         "requested");
 556                 wpabuf_free(wpa_s->sme.sae_token);
 557                 wpa_s->sme.sae_token = wpabuf_alloc_copy(data, len);
 558                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 559                                         wpa_s->current_ssid, 1);
 560                 return 0;
 561         }
 562
 563         if (auth_transaction == 1 &&
 564             status_code == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED &&
 565             wpa_s->sme.sae.state == SAE_COMMITTED &&
 566             wpa_s->current_bss && wpa_s->current_ssid) {
 567                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE group not supported");
 568                 wpa_s->sme.sae_group_index++;
 569                 if (sme_set_sae_group(wpa_s) < 0)
 570                         return -1; /* no other groups enabled */
 571                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Try next enabled SAE group");
 572                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 573                                         wpa_s->current_ssid, 1);
 574                 return 0;
 575         }
 576
 577         if (status_code != WLAN_STATUS_SUCCESS)
 578                 return -1;
 579
 580         if (auth_transaction == 1) {
 581                 int *groups = wpa_s->conf->sae_groups;
 582
 583                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
 584                 if (wpa_s->current_bss == NULL ||
 585                     wpa_s->current_ssid == NULL)
 586                         return -1;
 587                 if (wpa_s->sme.sae.state != SAE_COMMITTED)
 588                         return -1;
 589                 if (groups && groups[0] <= 0)
 590                         groups = NULL;
 591                 if (sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL,
 592                                      groups) != WLAN_STATUS_SUCCESS)
 593                         return -1;
 594
 595                 if (sae_process_commit(&wpa_s->sme.sae) < 0) {
 596                         wpa_printf(MSG_DEBUG, "SAE: Failed to process peer "
 597                                    "commit");
 598                         return -1;
 599                 }
 600
 601                 wpabuf_free(wpa_s->sme.sae_token);
 602                 wpa_s->sme.sae_token = NULL;
 603                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 604                                         wpa_s->current_ssid, 0);
 605                 return 0;
 606         } else if (auth_transaction == 2) {
 607                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
 608                 if (wpa_s->sme.sae.state != SAE_CONFIRMED)
 609                         return -1;
 610                 if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0)
 611                         return -1;
 612                 wpa_s->sme.sae.state = SAE_ACCEPTED;
 613                 sae_clear_temp_data(&wpa_s->sme.sae);
 614                 return 1;
 615         }
 616
 617         return -1;
 618 }
 619 #endif /* CONFIG_SAE */
 620
 621
 622 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
 623 {
 624         struct wpa_ssid *ssid = wpa_s->current_ssid;
 625
 626         if (ssid == NULL) {
 627                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 628                         "when network is not selected");
 629                 return;
 630         }
 631
 632         if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
 633                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 634                         "when not in authenticating state");
 635                 return;
 636         }
 637
 638         if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
 639                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
 640                         "unexpected peer " MACSTR,
 641                         MAC2STR(data->auth.peer));
 642                 return;
 643         }
 644
 645         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
 646                 " auth_type=%d auth_transaction=%d status_code=%d",
 647                 MAC2STR(data->auth.peer), data->auth.auth_type,
 648                 data->auth.auth_transaction, data->auth.status_code);
 649         wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
 650                     data->auth.ies, data->auth.ies_len);
 651
 652         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 653
 654 #ifdef CONFIG_SAE
 655         if (data->auth.auth_type == WLAN_AUTH_SAE) {
 656                 int res;
 657                 res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
 658                                    data->auth.status_code, data->auth.ies,
 659                                    data->auth.ies_len);
 660                 if (res < 0) {
 661                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 662                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 663
 664                 }
 665                 if (res != 1)
 666                         return;
 667
 668                 wpa_printf(MSG_DEBUG, "SME: SAE completed - setting PMK for "
 669                            "4-way handshake");
 670                 wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN);
 671         }
 672 #endif /* CONFIG_SAE */
 673
 674         if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
 675                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
 676                         "code %d)", data->auth.status_code);
 677
 678                 if (data->auth.status_code !=
 679                     WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
 680                     wpa_s->sme.auth_alg == data->auth.auth_type ||
 681                     wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
 682                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 683                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 684                         return;
 685                 }
 686
 687                 wpas_connect_work_done(wpa_s);
 688
 689                 switch (data->auth.auth_type) {
 690                 case WLAN_AUTH_OPEN:
 691                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 692
 693                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
 694                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 695                                                  wpa_s->current_ssid);
 696                         return;
 697
 698                 case WLAN_AUTH_SHARED_KEY:
 699                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
 700
 701                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
 702                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 703                                                  wpa_s->current_ssid);
 704                         return;
 705
 706                 default:
 707                         return;
 708                 }
 709         }
 710
 711 #ifdef CONFIG_IEEE80211R
 712         if (data->auth.auth_type == WLAN_AUTH_FT) {
 713                 union wpa_event_data edata;
 714                 os_memset(&edata, 0, sizeof(edata));
 715                 edata.ft_ies.ies = data->auth.ies;
 716                 edata.ft_ies.ies_len = data->auth.ies_len;
 717                 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
 718                 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
 719         }
 720 #endif /* CONFIG_IEEE80211R */
 721
 722         sme_associate(wpa_s, ssid->mode, data->auth.peer,
 723                       data->auth.auth_type);
 724 }
 725
 726
 727 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
 728                    const u8 *bssid, u16 auth_type)
 729 {
 730         struct wpa_driver_associate_params params;
 731         struct ieee802_11_elems elems;
 732 #ifdef CONFIG_HT_OVERRIDES
 733         struct ieee80211_ht_capabilities htcaps;
 734         struct ieee80211_ht_capabilities htcaps_mask;
 735 #endif /* CONFIG_HT_OVERRIDES */
 736 #ifdef CONFIG_VHT_OVERRIDES
 737         struct ieee80211_vht_capabilities vhtcaps;
 738         struct ieee80211_vht_capabilities vhtcaps_mask;
 739 #endif /* CONFIG_VHT_OVERRIDES */
 740
 741         os_memset(&params, 0, sizeof(params));
 742         params.bssid = bssid;
 743         params.ssid = wpa_s->sme.ssid;
 744         params.ssid_len = wpa_s->sme.ssid_len;
 745         params.freq = wpa_s->sme.freq;
 746         params.bg_scan_period = wpa_s->current_ssid ?
 747                 wpa_s->current_ssid->bg_scan_period : -1;
 748         params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
 749                 wpa_s->sme.assoc_req_ie : NULL;
 750         params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
 751         params.pairwise_suite = wpa_s->pairwise_cipher;
 752         params.group_suite = wpa_s->group_cipher;
 753         params.key_mgmt_suite = wpa_s->key_mgmt;
 754         params.wpa_proto = wpa_s->wpa_proto;
 755 #ifdef CONFIG_HT_OVERRIDES
 756         os_memset(&htcaps, 0, sizeof(htcaps));
 757         os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
 758         params.htcaps = (u8 *) &htcaps;
 759         params.htcaps_mask = (u8 *) &htcaps_mask;
 760         wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, &params);
 761 #endif /* CONFIG_HT_OVERRIDES */
 762 #ifdef CONFIG_VHT_OVERRIDES
 763         os_memset(&vhtcaps, 0, sizeof(vhtcaps));
 764         os_memset(&vhtcaps_mask, 0, sizeof(vhtcaps_mask));
 765         params.vhtcaps = &vhtcaps;
 766         params.vhtcaps_mask = &vhtcaps_mask;
 767         wpa_supplicant_apply_vht_overrides(wpa_s, wpa_s->current_ssid, &params);
 768 #endif /* CONFIG_VHT_OVERRIDES */
 769 #ifdef CONFIG_IEEE80211R
 770         if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
 771                 params.wpa_ie = wpa_s->sme.ft_ies;
 772                 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
 773         }
 774 #endif /* CONFIG_IEEE80211R */
 775         params.mode = mode;
 776         params.mgmt_frame_protection = wpa_s->sme.mfp;
 777         if (wpa_s->sme.prev_bssid_set)
 778                 params.prev_bssid = wpa_s->sme.prev_bssid;
 779
 780         wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
 781                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 782                 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
 783                 params.freq);
 784
 785         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
 786
 787         if (params.wpa_ie == NULL ||
 788             ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
 789             < 0) {
 790                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
 791                 os_memset(&elems, 0, sizeof(elems));
 792         }
 793         if (elems.rsn_ie) {
 794                 params.wpa_proto = WPA_PROTO_RSN;
 795                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
 796                                         elems.rsn_ie_len + 2);
 797         } else if (elems.wpa_ie) {
 798                 params.wpa_proto = WPA_PROTO_WPA;
 799                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
 800                                         elems.wpa_ie_len + 2);
 801         } else if (elems.osen) {
 802                 params.wpa_proto = WPA_PROTO_OSEN;
 803                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.osen - 2,
 804                                         elems.osen_len + 2);
 805         } else
 806                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 807         if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
 808                 params.p2p = 1;
 809
 810         if (wpa_s->parent->set_sta_uapsd)
 811                 params.uapsd = wpa_s->parent->sta_uapsd;
 812         else
 813                 params.uapsd = -1;
 814
 815         if (wpa_drv_associate(wpa_s, &params) < 0) {
 816                 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
 817                         "driver failed");
 818                 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 819                 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 820                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 821                 return;
 822         }
 823
 824         eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
 825                                NULL);
 826 }
 827
 828
 829 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
 830                       const u8 *ies, size_t ies_len)
 831 {
 832         if (md == NULL || ies == NULL) {
 833                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
 834                 os_free(wpa_s->sme.ft_ies);
 835                 wpa_s->sme.ft_ies = NULL;
 836                 wpa_s->sme.ft_ies_len = 0;
 837                 wpa_s->sme.ft_used = 0;
 838                 return 0;
 839         }
 840
 841         os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
 842         wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
 843         os_free(wpa_s->sme.ft_ies);
 844         wpa_s->sme.ft_ies = os_malloc(ies_len);
 845         if (wpa_s->sme.ft_ies == NULL)
 846                 return -1;
 847         os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
 848         wpa_s->sme.ft_ies_len = ies_len;
 849         return 0;
 850 }
 851
 852
 853 static void sme_deauth(struct wpa_supplicant *wpa_s)
 854 {
 855         int bssid_changed;
 856
 857         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 858
 859         if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
 860                                    WLAN_REASON_DEAUTH_LEAVING) < 0) {
 861                 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
 862                         "failed");
 863         }
 864         wpa_s->sme.prev_bssid_set = 0;
 865
 866         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 867         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 868         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 869         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 870         if (bssid_changed)
 871                 wpas_notify_bssid_changed(wpa_s);
 872 }
 873
 874
 875 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
 876                             union wpa_event_data *data)
 877 {
 878         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
 879                 "status code %d", MAC2STR(wpa_s->pending_bssid),
 880                 data->assoc_reject.status_code);
 881
 882         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 883
 884         /*
 885          * For now, unconditionally terminate the previous authentication. In
 886          * theory, this should not be needed, but mac80211 gets quite confused
 887          * if the authentication is left pending.. Some roaming cases might
 888          * benefit from using the previous authentication, so this could be
 889          * optimized in the future.
 890          */
 891         sme_deauth(wpa_s);
 892 }
 893
 894
 895 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
 896                               union wpa_event_data *data)
 897 {
 898         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
 899         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 900         wpa_supplicant_mark_disassoc(wpa_s);
 901 }
 902
 903
 904 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
 905                                union wpa_event_data *data)
 906 {
 907         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
 908         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 909         wpa_supplicant_mark_disassoc(wpa_s);
 910 }
 911
 912
 913 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
 914                         struct disassoc_info *info)
 915 {
 916         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
 917         if (wpa_s->sme.prev_bssid_set) {
 918                 /*
 919                  * cfg80211/mac80211 can get into somewhat confused state if
 920                  * the AP only disassociates us and leaves us in authenticated
 921                  * state. For now, force the state to be cleared to avoid
 922                  * confusing errors if we try to associate with the AP again.
 923                  */
 924                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
 925                         "driver state");
 926                 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
 927                                        WLAN_REASON_DEAUTH_LEAVING);
 928         }
 929 }
 930
 931
 932 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
 933 {
 934         struct wpa_supplicant *wpa_s = eloop_ctx;
 935         if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
 936                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
 937                 sme_deauth(wpa_s);
 938         }
 939 }
 940
 941
 942 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
 943 {
 944         struct wpa_supplicant *wpa_s = eloop_ctx;
 945         if (wpa_s->wpa_state == WPA_ASSOCIATING) {
 946                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
 947                 sme_deauth(wpa_s);
 948         }
 949 }
 950
 951
 952 void sme_state_changed(struct wpa_supplicant *wpa_s)
 953 {
 954         /* Make sure timers are cleaned up appropriately. */
 955         if (wpa_s->wpa_state != WPA_ASSOCIATING)
 956                 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 957         if (wpa_s->wpa_state != WPA_AUTHENTICATING)
 958                 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 959 }
 960
 961
 962 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
 963                                        const u8 *prev_pending_bssid)
 964 {
 965         /*
 966          * mac80211-workaround to force deauth on failed auth cmd,
 967          * requires us to remain in authenticating state to allow the
 968          * second authentication attempt to be continued properly.
 969          */
 970         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
 971                 "to proceed after disconnection event");
 972         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 973         os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
 974
 975         /*
 976          * Re-arm authentication timer in case auth fails for whatever reason.
 977          */
 978         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 979         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 980                                NULL);
 981 }
 982
 983
 984 void sme_deinit(struct wpa_supplicant *wpa_s)
 985 {
 986         os_free(wpa_s->sme.ft_ies);
 987         wpa_s->sme.ft_ies = NULL;
 988         wpa_s->sme.ft_ies_len = 0;
 989 #ifdef CONFIG_IEEE80211W
 990         sme_stop_sa_query(wpa_s);
 991 #endif /* CONFIG_IEEE80211W */
 992 #ifdef CONFIG_SAE
 993         wpabuf_free(wpa_s->sme.sae_token);
 994         wpa_s->sme.sae_token = NULL;
 995         sae_clear_data(&wpa_s->sme.sae);
 996 #endif /* CONFIG_SAE */
 997
 998         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 999         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1000         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1001 }
1002
1003
1004 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
1005                                    const u8 *chan_list, u8 num_channels,
1006                                    u8 num_intol)
1007 {
1008         struct ieee80211_2040_bss_coex_ie *bc_ie;
1009         struct ieee80211_2040_intol_chan_report *ic_report;
1010         struct wpabuf *buf;
1011
1012         wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR
1013                    " (num_channels=%u num_intol=%u)",
1014                    MAC2STR(wpa_s->bssid), num_channels, num_intol);
1015         wpa_hexdump(MSG_DEBUG, "SME: 20/40 BSS Intolerant Channels",
1016                     chan_list, num_channels);
1017
1018         buf = wpabuf_alloc(2 + /* action.category + action_code */
1019                            sizeof(struct ieee80211_2040_bss_coex_ie) +
1020                            sizeof(struct ieee80211_2040_intol_chan_report) +
1021                            num_channels);
1022         if (buf == NULL)
1023                 return;
1024
1025         wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
1026         wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
1027
1028         bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
1029         bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
1030         bc_ie->length = 1;
1031         if (num_intol)
1032                 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
1033
1034         if (num_channels > 0) {
1035                 ic_report = wpabuf_put(buf, sizeof(*ic_report));
1036                 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
1037                 ic_report->length = num_channels + 1;
1038                 ic_report->op_class = 0;
1039                 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
1040                           num_channels);
1041         }
1042
1043         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1044                                 wpa_s->own_addr, wpa_s->bssid,
1045                                 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
1046                 wpa_msg(wpa_s, MSG_INFO,
1047                         "SME: Failed to send 20/40 BSS Coexistence frame");
1048         }
1049
1050         wpabuf_free(buf);
1051 }
1052
1053
1054 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
1055 {
1056         struct wpa_bss *bss;
1057         const u8 *ie;
1058         u16 ht_cap;
1059         u8 chan_list[P2P_MAX_CHANNELS], channel;
1060         u8 num_channels = 0, num_intol = 0, i;
1061
1062         if (!wpa_s->sme.sched_obss_scan)
1063                 return 0;
1064
1065         wpa_s->sme.sched_obss_scan = 0;
1066         if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
1067                 return 1;
1068
1069         /*
1070          * Check whether AP uses regulatory triplet or channel triplet in
1071          * country info. Right now the operating class of the BSS channel
1072          * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
1073          * based on the assumption that operating class triplet is not used in
1074          * beacon frame. If the First Channel Number/Operating Extension
1075          * Identifier octet has a positive integer value of 201 or greater,
1076          * then its operating class triplet.
1077          *
1078          * TODO: If Supported Operating Classes element is present in beacon
1079          * frame, have to lookup operating class in Annex E and fill them in
1080          * 2040 coex frame.
1081          */
1082         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
1083         if (ie && (ie[1] >= 6) && (ie[5] >= 201))
1084                 return 1;
1085
1086         os_memset(chan_list, 0, sizeof(chan_list));
1087
1088         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1089                 /* Skip other band bss */
1090                 enum hostapd_hw_mode mode;
1091                 mode = ieee80211_freq_to_chan(bss->freq, &channel);
1092                 if (mode != HOSTAPD_MODE_IEEE80211G &&
1093                     mode != HOSTAPD_MODE_IEEE80211B)
1094                         continue;
1095
1096                 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
1097                 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
1098                 wpa_printf(MSG_DEBUG, "SME OBSS scan BSS " MACSTR
1099                            " freq=%u chan=%u ht_cap=0x%x",
1100                            MAC2STR(bss->bssid), bss->freq, channel, ht_cap);
1101
1102                 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
1103                         if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
1104                                 num_intol++;
1105
1106                         /* Check whether the channel is already considered */
1107                         for (i = 0; i < num_channels; i++) {
1108                                 if (channel == chan_list[i])
1109                                         break;
1110                         }
1111                         if (i != num_channels)
1112                                 continue;
1113
1114                         chan_list[num_channels++] = channel;
1115                 }
1116         }
1117
1118         sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
1119         return 1;
1120 }
1121
1122
1123 static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
1124                                           u16 num_modes,
1125                                           enum hostapd_hw_mode mode)
1126 {
1127         u16 i;
1128
1129         for (i = 0; i < num_modes; i++) {
1130                 if (modes[i].mode == mode)
1131                         return &modes[i];
1132         }
1133
1134         return NULL;
1135 }
1136
1137
1138 static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s,
1139                                         enum hostapd_hw_mode band,
1140                                         struct wpa_driver_scan_params *params)
1141 {
1142         /* Include only supported channels for the specified band */
1143         struct hostapd_hw_modes *mode;
1144         int count, i;
1145
1146         mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band);
1147         if (mode == NULL) {
1148                 /* No channels supported in this band - use empty list */
1149                 params->freqs = os_zalloc(sizeof(int));
1150                 return;
1151         }
1152
1153         params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
1154         if (params->freqs == NULL)
1155                 return;
1156         for (count = 0, i = 0; i < mode->num_channels; i++) {
1157                 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
1158                         continue;
1159                 params->freqs[count++] = mode->channels[i].freq;
1160         }
1161 }
1162
1163
1164 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1165 {
1166         struct wpa_supplicant *wpa_s = eloop_ctx;
1167         struct wpa_driver_scan_params params;
1168
1169         if (!wpa_s->current_bss) {
1170                 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
1171                 return;
1172         }
1173
1174         os_memset(&params, 0, sizeof(params));
1175         wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G, &params);
1176         params.low_priority = 1;
1177         wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
1178
1179         if (wpa_supplicant_trigger_scan(wpa_s, &params))
1180                 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
1181         else
1182                 wpa_s->sme.sched_obss_scan = 1;
1183         os_free(params.freqs);
1184
1185         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1186                                sme_obss_scan_timeout, wpa_s, NULL);
1187 }
1188
1189
1190 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
1191 {
1192         const u8 *ie;
1193         struct wpa_bss *bss = wpa_s->current_bss;
1194         struct wpa_ssid *ssid = wpa_s->current_ssid;
1195         struct hostapd_hw_modes *hw_mode = NULL;
1196         int i;
1197
1198         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1199         wpa_s->sme.sched_obss_scan = 0;
1200         if (!enable)
1201                 return;
1202
1203         /*
1204          * Schedule OBSS scan if driver is using station SME in wpa_supplicant
1205          * or it expects OBSS scan to be performed by wpa_supplicant.
1206          */
1207         if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
1208               (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
1209             ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
1210                 return;
1211
1212         if (!wpa_s->hw.modes)
1213                 return;
1214
1215         /* only HT caps in 11g mode are relevant */
1216         for (i = 0; i < wpa_s->hw.num_modes; i++) {
1217                 hw_mode = &wpa_s->hw.modes[i];
1218                 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
1219                         break;
1220         }
1221
1222         /* Driver does not support HT40 for 11g or doesn't have 11g. */
1223         if (i == wpa_s->hw.num_modes || !hw_mode ||
1224             !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1225                 return;
1226
1227         if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
1228                 return; /* Not associated on 2.4 GHz band */
1229
1230         /* Check whether AP supports HT40 */
1231         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
1232         if (!ie || ie[1] < 2 ||
1233             !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1234                 return; /* AP does not support HT40 */
1235
1236         ie = wpa_bss_get_ie(wpa_s->current_bss,
1237                             WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
1238         if (!ie || ie[1] < 14)
1239                 return; /* AP does not request OBSS scans */
1240
1241         wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
1242         if (wpa_s->sme.obss_scan_int < 10) {
1243                 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
1244                            "replaced with the minimum 10 sec",
1245                            wpa_s->sme.obss_scan_int);
1246                 wpa_s->sme.obss_scan_int = 10;
1247         }
1248         wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
1249                    wpa_s->sme.obss_scan_int);
1250         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1251                                sme_obss_scan_timeout, wpa_s, NULL);
1252 }
1253
1254
1255 #ifdef CONFIG_IEEE80211W
1256
1257 static const unsigned int sa_query_max_timeout = 1000;
1258 static const unsigned int sa_query_retry_timeout = 201;
1259
1260 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
1261 {
1262         u32 tu;
1263         struct os_reltime now, passed;
1264         os_get_reltime(&now);
1265         os_reltime_sub(&now, &wpa_s->sme.sa_query_start, &passed);
1266         tu = (passed.sec * 1000000 + passed.usec) / 1024;
1267         if (sa_query_max_timeout < tu) {
1268                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
1269                 sme_stop_sa_query(wpa_s);
1270                 wpa_supplicant_deauthenticate(
1271                         wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
1272                 return 1;
1273         }
1274
1275         return 0;
1276 }
1277
1278
1279 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
1280                                   const u8 *trans_id)
1281 {
1282         u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
1283         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
1284                 MACSTR, MAC2STR(wpa_s->bssid));
1285         wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
1286                     trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1287         req[0] = WLAN_ACTION_SA_QUERY;
1288         req[1] = WLAN_SA_QUERY_REQUEST;
1289         os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1290         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1291                                 wpa_s->own_addr, wpa_s->bssid,
1292                                 req, sizeof(req), 0) < 0)
1293                 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
1294                         "Request");
1295 }
1296
1297
1298 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
1299 {
1300         struct wpa_supplicant *wpa_s = eloop_ctx;
1301         unsigned int timeout, sec, usec;
1302         u8 *trans_id, *nbuf;
1303
1304         if (wpa_s->sme.sa_query_count > 0 &&
1305             sme_check_sa_query_timeout(wpa_s))
1306                 return;
1307
1308         nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
1309                                 wpa_s->sme.sa_query_count + 1,
1310                                 WLAN_SA_QUERY_TR_ID_LEN);
1311         if (nbuf == NULL)
1312                 return;
1313         if (wpa_s->sme.sa_query_count == 0) {
1314                 /* Starting a new SA Query procedure */
1315                 os_get_reltime(&wpa_s->sme.sa_query_start);
1316         }
1317         trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
1318         wpa_s->sme.sa_query_trans_id = nbuf;
1319         wpa_s->sme.sa_query_count++;
1320
1321         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1322
1323         timeout = sa_query_retry_timeout;
1324         sec = ((timeout / 1000) * 1024) / 1000;
1325         usec = (timeout % 1000) * 1024;
1326         eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
1327
1328         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
1329                 wpa_s->sme.sa_query_count);
1330
1331         sme_send_sa_query_req(wpa_s, trans_id);
1332 }
1333
1334
1335 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
1336 {
1337         sme_sa_query_timer(wpa_s, NULL);
1338 }
1339
1340
1341 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
1342 {
1343         eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
1344         os_free(wpa_s->sme.sa_query_trans_id);
1345         wpa_s->sme.sa_query_trans_id = NULL;
1346         wpa_s->sme.sa_query_count = 0;
1347 }
1348
1349
1350 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1351                                  const u8 *da, u16 reason_code)
1352 {
1353         struct wpa_ssid *ssid;
1354         struct os_reltime now;
1355
1356         if (wpa_s->wpa_state != WPA_COMPLETED)
1357                 return;
1358         ssid = wpa_s->current_ssid;
1359         if (ssid == NULL ||
1360             (ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
1361              wpa_s->conf->pmf : ssid->ieee80211w) == NO_MGMT_FRAME_PROTECTION)
1362                 return;
1363         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1364                 return;
1365         if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1366             reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1367                 return;
1368         if (wpa_s->sme.sa_query_count > 0)
1369                 return;
1370
1371         os_get_reltime(&now);
1372         if (wpa_s->sme.last_unprot_disconnect.sec &&
1373             !os_reltime_expired(&now, &wpa_s->sme.last_unprot_disconnect, 10))
1374                 return; /* limit SA Query procedure frequency */
1375         wpa_s->sme.last_unprot_disconnect = now;
1376
1377         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1378                 "possible AP/STA state mismatch - trigger SA Query");
1379         sme_start_sa_query(wpa_s);
1380 }
1381
1382
1383 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1384                      const u8 *data, size_t len)
1385 {
1386         int i;
1387
1388         if (wpa_s->sme.sa_query_trans_id == NULL ||
1389             len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1390             data[0] != WLAN_SA_QUERY_RESPONSE)
1391                 return;
1392         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1393                 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1394
1395         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1396                 return;
1397
1398         for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1399                 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1400                               i * WLAN_SA_QUERY_TR_ID_LEN,
1401                               data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1402                         break;
1403         }
1404
1405         if (i >= wpa_s->sme.sa_query_count) {
1406                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1407                         "transaction identifier found");
1408                 return;
1409         }
1410
1411         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1412                 "from " MACSTR, MAC2STR(sa));
1413         sme_stop_sa_query(wpa_s);
1414 }
1415
1416 #endif /* CONFIG_IEEE80211W */