wpa_supplicant/sme.c

   1 /*
   2  * wpa_supplicant - SME
   3  * Copyright (c) 2009-2012, 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 struct wpabuf * sme_auth_build_sae_commit(struct wpa_supplicant *wpa_s,
  46                                                  struct wpa_ssid *ssid,
  47                                                  const u8 *bssid)
  48 {
  49         struct wpabuf *buf;
  50         size_t len;
  51
  52         if (ssid->passphrase == NULL) {
  53                 wpa_printf(MSG_DEBUG, "SAE: No password available");
  54                 return NULL;
  55         }
  56
  57         if (sae_set_group(&wpa_s->sme.sae, 19) < 0)
  58                 return NULL;
  59
  60         if (sae_prepare_commit(wpa_s->own_addr, bssid,
  61                                (u8 *) ssid->passphrase,
  62                                os_strlen(ssid->passphrase),
  63                                &wpa_s->sme.sae) < 0) {
  64                 wpa_printf(MSG_DEBUG, "SAE: Could not pick PWE");
  65                 return NULL;
  66         }
  67
  68         len = wpa_s->sme.sae_token ? wpabuf_len(wpa_s->sme.sae_token) : 0;
  69         buf = wpabuf_alloc(4 + SAE_COMMIT_MAX_LEN + len);
  70         if (buf == NULL)
  71                 return NULL;
  72
  73         wpabuf_put_le16(buf, 1); /* Transaction seq# */
  74         wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
  75         sae_write_commit(&wpa_s->sme.sae, buf, wpa_s->sme.sae_token);
  76
  77         return buf;
  78 }
  79
  80
  81 static struct wpabuf * sme_auth_build_sae_confirm(struct wpa_supplicant *wpa_s)
  82 {
  83         struct wpabuf *buf;
  84
  85         buf = wpabuf_alloc(4 + SAE_CONFIRM_MAX_LEN);
  86         if (buf == NULL)
  87                 return NULL;
  88
  89         wpabuf_put_le16(buf, 2); /* Transaction seq# */
  90         wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
  91         sae_write_confirm(&wpa_s->sme.sae, buf);
  92
  93         return buf;
  94 }
  95
  96 #endif /* CONFIG_SAE */
  97
  98
  99 static void sme_send_authentication(struct wpa_supplicant *wpa_s,
 100                                     struct wpa_bss *bss, struct wpa_ssid *ssid,
 101                                     int start)
 102 {
 103         struct wpa_driver_auth_params params;
 104         struct wpa_ssid *old_ssid;
 105 #ifdef CONFIG_IEEE80211R
 106         const u8 *ie;
 107 #endif /* CONFIG_IEEE80211R */
 108 #ifdef CONFIG_IEEE80211R
 109         const u8 *md = NULL;
 110 #endif /* CONFIG_IEEE80211R */
 111         int i, bssid_changed;
 112         struct wpabuf *resp = NULL;
 113         u8 ext_capab[10];
 114         int ext_capab_len;
 115
 116         if (bss == NULL) {
 117                 wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for "
 118                         "the network");
 119                 return;
 120         }
 121
 122         wpa_s->current_bss = bss;
 123
 124         os_memset(&params, 0, sizeof(params));
 125         wpa_s->reassociate = 0;
 126
 127         params.freq = bss->freq;
 128         params.bssid = bss->bssid;
 129         params.ssid = bss->ssid;
 130         params.ssid_len = bss->ssid_len;
 131         params.p2p = ssid->p2p_group;
 132
 133         if (wpa_s->sme.ssid_len != params.ssid_len ||
 134             os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
 135                 wpa_s->sme.prev_bssid_set = 0;
 136
 137         wpa_s->sme.freq = params.freq;
 138         os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
 139         wpa_s->sme.ssid_len = params.ssid_len;
 140
 141         params.auth_alg = WPA_AUTH_ALG_OPEN;
 142 #ifdef IEEE8021X_EAPOL
 143         if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
 144                 if (ssid->leap) {
 145                         if (ssid->non_leap == 0)
 146                                 params.auth_alg = WPA_AUTH_ALG_LEAP;
 147                         else
 148                                 params.auth_alg |= WPA_AUTH_ALG_LEAP;
 149                 }
 150         }
 151 #endif /* IEEE8021X_EAPOL */
 152         wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
 153                 params.auth_alg);
 154         if (ssid->auth_alg) {
 155                 params.auth_alg = ssid->auth_alg;
 156                 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
 157                         "0x%x", params.auth_alg);
 158         }
 159 #ifdef CONFIG_SAE
 160         if (wpa_key_mgmt_sae(ssid->key_mgmt)) {
 161                 const u8 *rsn;
 162                 struct wpa_ie_data ied;
 163
 164                 rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 165                 if (rsn &&
 166                     wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0) {
 167                         if (wpa_key_mgmt_sae(ied.key_mgmt)) {
 168                                 wpa_dbg(wpa_s, MSG_DEBUG, "Using SAE auth_alg");
 169                                 params.auth_alg = WPA_AUTH_ALG_SAE;
 170                         }
 171                 }
 172         }
 173 #endif /* CONFIG_SAE */
 174
 175         for (i = 0; i < NUM_WEP_KEYS; i++) {
 176                 if (ssid->wep_key_len[i])
 177                         params.wep_key[i] = ssid->wep_key[i];
 178                 params.wep_key_len[i] = ssid->wep_key_len[i];
 179         }
 180         params.wep_tx_keyidx = ssid->wep_tx_keyidx;
 181
 182         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 183         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 184         os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
 185         if (bssid_changed)
 186                 wpas_notify_bssid_changed(wpa_s);
 187
 188         if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
 189              wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
 190             wpa_key_mgmt_wpa(ssid->key_mgmt)) {
 191                 int try_opportunistic;
 192                 try_opportunistic = (ssid->proactive_key_caching < 0 ?
 193                                      wpa_s->conf->okc :
 194                                      ssid->proactive_key_caching) &&
 195                         (ssid->proto & WPA_PROTO_RSN);
 196                 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
 197                                             wpa_s->current_ssid,
 198                                             try_opportunistic) == 0)
 199                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
 200                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 201                 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
 202                                               wpa_s->sme.assoc_req_ie,
 203                                               &wpa_s->sme.assoc_req_ie_len)) {
 204                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 205                                 "key management and encryption suites");
 206                         return;
 207                 }
 208         } else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
 209                    wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) {
 210                 /*
 211                  * Both WPA and non-WPA IEEE 802.1X enabled in configuration -
 212                  * use non-WPA since the scan results did not indicate that the
 213                  * AP is using WPA or WPA2.
 214                  */
 215                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 216                 wpa_s->sme.assoc_req_ie_len = 0;
 217         } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
 218                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 219                 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
 220                                               wpa_s->sme.assoc_req_ie,
 221                                               &wpa_s->sme.assoc_req_ie_len)) {
 222                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 223                                 "key management and encryption suites (no "
 224                                 "scan results)");
 225                         return;
 226                 }
 227 #ifdef CONFIG_WPS
 228         } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 229                 struct wpabuf *wps_ie;
 230                 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
 231                 if (wps_ie && wpabuf_len(wps_ie) <=
 232                     sizeof(wpa_s->sme.assoc_req_ie)) {
 233                         wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
 234                         os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
 235                                   wpa_s->sme.assoc_req_ie_len);
 236                 } else
 237                         wpa_s->sme.assoc_req_ie_len = 0;
 238                 wpabuf_free(wps_ie);
 239                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 240 #endif /* CONFIG_WPS */
 241         } else {
 242                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 243                 wpa_s->sme.assoc_req_ie_len = 0;
 244         }
 245
 246 #ifdef CONFIG_IEEE80211R
 247         ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
 248         if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
 249                 md = ie + 2;
 250         wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
 251         if (md) {
 252                 /* Prepare for the next transition */
 253                 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
 254         }
 255
 256         if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) {
 257                 if (wpa_s->sme.assoc_req_ie_len + 5 <
 258                     sizeof(wpa_s->sme.assoc_req_ie)) {
 259                         struct rsn_mdie *mdie;
 260                         u8 *pos = wpa_s->sme.assoc_req_ie +
 261                                 wpa_s->sme.assoc_req_ie_len;
 262                         *pos++ = WLAN_EID_MOBILITY_DOMAIN;
 263                         *pos++ = sizeof(*mdie);
 264                         mdie = (struct rsn_mdie *) pos;
 265                         os_memcpy(mdie->mobility_domain, md,
 266                                   MOBILITY_DOMAIN_ID_LEN);
 267                         mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
 268                         wpa_s->sme.assoc_req_ie_len += 5;
 269                 }
 270
 271                 if (wpa_s->sme.ft_used &&
 272                     os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
 273                     wpa_sm_has_ptk(wpa_s->wpa)) {
 274                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT "
 275                                 "over-the-air");
 276                         params.auth_alg = WPA_AUTH_ALG_FT;
 277                         params.ie = wpa_s->sme.ft_ies;
 278                         params.ie_len = wpa_s->sme.ft_ies_len;
 279                 }
 280         }
 281 #endif /* CONFIG_IEEE80211R */
 282
 283 #ifdef CONFIG_IEEE80211W
 284         wpa_s->sme.mfp = ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
 285                 wpa_s->conf->pmf : ssid->ieee80211w;
 286         if (wpa_s->sme.mfp != NO_MGMT_FRAME_PROTECTION) {
 287                 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 288                 struct wpa_ie_data _ie;
 289                 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
 290                     _ie.capabilities &
 291                     (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
 292                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
 293                                 "MFP: require MFP");
 294                         wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
 295                 }
 296         }
 297 #endif /* CONFIG_IEEE80211W */
 298
 299 #ifdef CONFIG_P2P
 300         if (wpa_s->global->p2p) {
 301                 u8 *pos;
 302                 size_t len;
 303                 int res;
 304                 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
 305                 len = sizeof(wpa_s->sme.assoc_req_ie) -
 306                         wpa_s->sme.assoc_req_ie_len;
 307                 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
 308                                             ssid->p2p_group);
 309                 if (res >= 0)
 310                         wpa_s->sme.assoc_req_ie_len += res;
 311         }
 312 #endif /* CONFIG_P2P */
 313
 314 #ifdef CONFIG_HS20
 315         if (wpa_s->conf->hs20) {
 316                 struct wpabuf *hs20;
 317                 hs20 = wpabuf_alloc(20);
 318                 if (hs20) {
 319                         wpas_hs20_add_indication(hs20);
 320                         os_memcpy(wpa_s->sme.assoc_req_ie +
 321                                   wpa_s->sme.assoc_req_ie_len,
 322                                   wpabuf_head(hs20), wpabuf_len(hs20));
 323                         wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
 324                         wpabuf_free(hs20);
 325                 }
 326         }
 327 #endif /* CONFIG_HS20 */
 328
 329         ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab);
 330         if (ext_capab_len > 0) {
 331                 u8 *pos = wpa_s->sme.assoc_req_ie;
 332                 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
 333                         pos += 2 + pos[1];
 334                 os_memmove(pos + ext_capab_len, pos,
 335                            wpa_s->sme.assoc_req_ie_len -
 336                            (pos - wpa_s->sme.assoc_req_ie));
 337                 wpa_s->sme.assoc_req_ie_len += ext_capab_len;
 338                 os_memcpy(pos, ext_capab, ext_capab_len);
 339         }
 340
 341 #ifdef CONFIG_SAE
 342         if (params.auth_alg == WPA_AUTH_ALG_SAE) {
 343                 if (start)
 344                         resp = sme_auth_build_sae_commit(wpa_s, ssid,
 345                                                          bss->bssid);
 346                 else
 347                         resp = sme_auth_build_sae_confirm(wpa_s);
 348                 if (resp == NULL)
 349                         return;
 350                 params.sae_data = wpabuf_head(resp);
 351                 params.sae_data_len = wpabuf_len(resp);
 352                 wpa_s->sme.sae.state = start ? SAE_COMMITTED : SAE_CONFIRMED;
 353         }
 354 #endif /* CONFIG_SAE */
 355
 356         wpa_supplicant_cancel_sched_scan(wpa_s);
 357         wpa_supplicant_cancel_scan(wpa_s);
 358
 359         wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
 360                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 361                 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
 362
 363         wpa_clear_keys(wpa_s, bss->bssid);
 364         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 365         old_ssid = wpa_s->current_ssid;
 366         wpa_s->current_ssid = ssid;
 367         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
 368         wpa_supplicant_initiate_eapol(wpa_s);
 369         if (old_ssid != wpa_s->current_ssid)
 370                 wpas_notify_network_changed(wpa_s);
 371
 372         wpa_s->sme.auth_alg = params.auth_alg;
 373         if (wpa_drv_authenticate(wpa_s, &params) < 0) {
 374                 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
 375                         "driver failed");
 376                 wpas_connection_failed(wpa_s, bss->bssid);
 377                 wpa_supplicant_mark_disassoc(wpa_s);
 378                 wpabuf_free(resp);
 379                 return;
 380         }
 381
 382         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 383                                NULL);
 384
 385         /*
 386          * Association will be started based on the authentication event from
 387          * the driver.
 388          */
 389
 390         wpabuf_free(resp);
 391 }
 392
 393
 394 void sme_authenticate(struct wpa_supplicant *wpa_s,
 395                       struct wpa_bss *bss, struct wpa_ssid *ssid)
 396 {
 397 #ifdef CONFIG_SAE
 398         wpa_s->sme.sae.state = SAE_NOTHING;
 399         wpa_s->sme.sae.send_confirm = 0;
 400 #endif /* CONFIG_SAE */
 401         sme_send_authentication(wpa_s, bss, ssid, 1);
 402 }
 403
 404
 405 #ifdef CONFIG_SAE
 406
 407 static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
 408                         u16 status_code, const u8 *data, size_t len)
 409 {
 410         wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
 411                 "status code %u", auth_transaction, status_code);
 412         wpa_hexdump(MSG_DEBUG, "SME: SAE fields", data, len);
 413
 414         if (auth_transaction == 1 &&
 415             status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
 416             wpa_s->sme.sae.state == SAE_COMMITTED &&
 417             wpa_s->current_bss && wpa_s->current_ssid) {
 418                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE anti-clogging token "
 419                         "requested");
 420                 wpabuf_free(wpa_s->sme.sae_token);
 421                 wpa_s->sme.sae_token = wpabuf_alloc_copy(data, len);
 422                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 423                                         wpa_s->current_ssid, 1);
 424                 return 0;
 425         }
 426
 427         if (status_code != WLAN_STATUS_SUCCESS)
 428                 return -1;
 429
 430         if (auth_transaction == 1) {
 431                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
 432                 if (wpa_s->current_bss == NULL ||
 433                     wpa_s->current_ssid == NULL)
 434                         return -1;
 435                 if (wpa_s->sme.sae.state != SAE_COMMITTED)
 436                         return -1;
 437                 if (sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL) !=
 438                     WLAN_STATUS_SUCCESS)
 439                         return -1;
 440
 441                 if (sae_process_commit(&wpa_s->sme.sae) < 0) {
 442                         wpa_printf(MSG_DEBUG, "SAE: Failed to process peer "
 443                                    "commit");
 444                         return -1;
 445                 }
 446
 447                 wpabuf_free(wpa_s->sme.sae_token);
 448                 wpa_s->sme.sae_token = NULL;
 449                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 450                                         wpa_s->current_ssid, 0);
 451                 return 0;
 452         } else if (auth_transaction == 2) {
 453                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
 454                 if (wpa_s->sme.sae.state != SAE_CONFIRMED)
 455                         return -1;
 456                 if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0)
 457                         return -1;
 458                 wpa_s->sme.sae.state = SAE_ACCEPTED;
 459                 return 1;
 460         }
 461
 462         return -1;
 463 }
 464 #endif /* CONFIG_SAE */
 465
 466
 467 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
 468 {
 469         struct wpa_ssid *ssid = wpa_s->current_ssid;
 470
 471         if (ssid == NULL) {
 472                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 473                         "when network is not selected");
 474                 return;
 475         }
 476
 477         if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
 478                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 479                         "when not in authenticating state");
 480                 return;
 481         }
 482
 483         if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
 484                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
 485                         "unexpected peer " MACSTR,
 486                         MAC2STR(data->auth.peer));
 487                 return;
 488         }
 489
 490         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
 491                 " auth_type=%d auth_transaction=%d status_code=%d",
 492                 MAC2STR(data->auth.peer), data->auth.auth_type,
 493                 data->auth.auth_transaction, data->auth.status_code);
 494         wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
 495                     data->auth.ies, data->auth.ies_len);
 496
 497         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 498
 499 #ifdef CONFIG_SAE
 500         if (data->auth.auth_type == WLAN_AUTH_SAE) {
 501                 int res;
 502                 res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
 503                                    data->auth.status_code, data->auth.ies,
 504                                    data->auth.ies_len);
 505                 if (res < 0) {
 506                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 507                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 508
 509                 }
 510                 if (res != 1)
 511                         return;
 512
 513                 wpa_printf(MSG_DEBUG, "SME: SAE completed - setting PMK for "
 514                            "4-way handshake");
 515                 wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN);
 516         }
 517 #endif /* CONFIG_SAE */
 518
 519         if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
 520                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
 521                         "code %d)", data->auth.status_code);
 522
 523                 if (data->auth.status_code !=
 524                     WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
 525                     wpa_s->sme.auth_alg == data->auth.auth_type ||
 526                     wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
 527                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 528                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 529                         return;
 530                 }
 531
 532                 switch (data->auth.auth_type) {
 533                 case WLAN_AUTH_OPEN:
 534                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 535
 536                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
 537                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 538                                                  wpa_s->current_ssid);
 539                         return;
 540
 541                 case WLAN_AUTH_SHARED_KEY:
 542                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
 543
 544                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
 545                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 546                                                  wpa_s->current_ssid);
 547                         return;
 548
 549                 default:
 550                         return;
 551                 }
 552         }
 553
 554 #ifdef CONFIG_IEEE80211R
 555         if (data->auth.auth_type == WLAN_AUTH_FT) {
 556                 union wpa_event_data edata;
 557                 os_memset(&edata, 0, sizeof(edata));
 558                 edata.ft_ies.ies = data->auth.ies;
 559                 edata.ft_ies.ies_len = data->auth.ies_len;
 560                 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
 561                 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
 562         }
 563 #endif /* CONFIG_IEEE80211R */
 564
 565         sme_associate(wpa_s, ssid->mode, data->auth.peer,
 566                       data->auth.auth_type);
 567 }
 568
 569
 570 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
 571                    const u8 *bssid, u16 auth_type)
 572 {
 573         struct wpa_driver_associate_params params;
 574         struct ieee802_11_elems elems;
 575 #ifdef CONFIG_HT_OVERRIDES
 576         struct ieee80211_ht_capabilities htcaps;
 577         struct ieee80211_ht_capabilities htcaps_mask;
 578 #endif /* CONFIG_HT_OVERRIDES */
 579
 580         os_memset(&params, 0, sizeof(params));
 581         params.bssid = bssid;
 582         params.ssid = wpa_s->sme.ssid;
 583         params.ssid_len = wpa_s->sme.ssid_len;
 584         params.freq = wpa_s->sme.freq;
 585         params.bg_scan_period = wpa_s->current_ssid ?
 586                 wpa_s->current_ssid->bg_scan_period : -1;
 587         params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
 588                 wpa_s->sme.assoc_req_ie : NULL;
 589         params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
 590         params.pairwise_suite = cipher_suite2driver(wpa_s->pairwise_cipher);
 591         params.group_suite = cipher_suite2driver(wpa_s->group_cipher);
 592 #ifdef CONFIG_HT_OVERRIDES
 593         os_memset(&htcaps, 0, sizeof(htcaps));
 594         os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
 595         params.htcaps = (u8 *) &htcaps;
 596         params.htcaps_mask = (u8 *) &htcaps_mask;
 597         wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, &params);
 598 #endif /* CONFIG_HT_OVERRIDES */
 599 #ifdef CONFIG_IEEE80211R
 600         if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
 601                 params.wpa_ie = wpa_s->sme.ft_ies;
 602                 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
 603         }
 604 #endif /* CONFIG_IEEE80211R */
 605         params.mode = mode;
 606         params.mgmt_frame_protection = wpa_s->sme.mfp;
 607         if (wpa_s->sme.prev_bssid_set)
 608                 params.prev_bssid = wpa_s->sme.prev_bssid;
 609
 610         wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
 611                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 612                 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
 613                 params.freq);
 614
 615         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
 616
 617         if (params.wpa_ie == NULL ||
 618             ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
 619             < 0) {
 620                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
 621                 os_memset(&elems, 0, sizeof(elems));
 622         }
 623         if (elems.rsn_ie) {
 624                 params.wpa_proto = WPA_PROTO_RSN;
 625                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
 626                                         elems.rsn_ie_len + 2);
 627         } else if (elems.wpa_ie) {
 628                 params.wpa_proto = WPA_PROTO_WPA;
 629                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
 630                                         elems.wpa_ie_len + 2);
 631         } else
 632                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 633         if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
 634                 params.p2p = 1;
 635
 636         if (wpa_s->parent->set_sta_uapsd)
 637                 params.uapsd = wpa_s->parent->sta_uapsd;
 638         else
 639                 params.uapsd = -1;
 640
 641         if (wpa_drv_associate(wpa_s, &params) < 0) {
 642                 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
 643                         "driver failed");
 644                 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 645                 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 646                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 647                 return;
 648         }
 649
 650         eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
 651                                NULL);
 652 }
 653
 654
 655 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
 656                       const u8 *ies, size_t ies_len)
 657 {
 658         if (md == NULL || ies == NULL) {
 659                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
 660                 os_free(wpa_s->sme.ft_ies);
 661                 wpa_s->sme.ft_ies = NULL;
 662                 wpa_s->sme.ft_ies_len = 0;
 663                 wpa_s->sme.ft_used = 0;
 664                 return 0;
 665         }
 666
 667         os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
 668         wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
 669         os_free(wpa_s->sme.ft_ies);
 670         wpa_s->sme.ft_ies = os_malloc(ies_len);
 671         if (wpa_s->sme.ft_ies == NULL)
 672                 return -1;
 673         os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
 674         wpa_s->sme.ft_ies_len = ies_len;
 675         return 0;
 676 }
 677
 678
 679 static void sme_deauth(struct wpa_supplicant *wpa_s)
 680 {
 681         int bssid_changed;
 682
 683         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 684
 685         if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
 686                                    WLAN_REASON_DEAUTH_LEAVING) < 0) {
 687                 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
 688                         "failed");
 689         }
 690         wpa_s->sme.prev_bssid_set = 0;
 691
 692         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 693         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 694         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 695         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 696         if (bssid_changed)
 697                 wpas_notify_bssid_changed(wpa_s);
 698 }
 699
 700
 701 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
 702                             union wpa_event_data *data)
 703 {
 704         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
 705                 "status code %d", MAC2STR(wpa_s->pending_bssid),
 706                 data->assoc_reject.status_code);
 707
 708         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 709
 710         /*
 711          * For now, unconditionally terminate the previous authentication. In
 712          * theory, this should not be needed, but mac80211 gets quite confused
 713          * if the authentication is left pending.. Some roaming cases might
 714          * benefit from using the previous authentication, so this could be
 715          * optimized in the future.
 716          */
 717         sme_deauth(wpa_s);
 718 }
 719
 720
 721 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
 722                               union wpa_event_data *data)
 723 {
 724         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
 725         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 726         wpa_supplicant_mark_disassoc(wpa_s);
 727 }
 728
 729
 730 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
 731                                union wpa_event_data *data)
 732 {
 733         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
 734         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 735         wpa_supplicant_mark_disassoc(wpa_s);
 736 }
 737
 738
 739 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
 740                         union wpa_event_data *data)
 741 {
 742         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
 743         if (wpa_s->sme.prev_bssid_set) {
 744                 /*
 745                  * cfg80211/mac80211 can get into somewhat confused state if
 746                  * the AP only disassociates us and leaves us in authenticated
 747                  * state. For now, force the state to be cleared to avoid
 748                  * confusing errors if we try to associate with the AP again.
 749                  */
 750                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
 751                         "driver state");
 752                 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
 753                                        WLAN_REASON_DEAUTH_LEAVING);
 754         }
 755 }
 756
 757
 758 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
 759 {
 760         struct wpa_supplicant *wpa_s = eloop_ctx;
 761         if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
 762                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
 763                 sme_deauth(wpa_s);
 764         }
 765 }
 766
 767
 768 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
 769 {
 770         struct wpa_supplicant *wpa_s = eloop_ctx;
 771         if (wpa_s->wpa_state == WPA_ASSOCIATING) {
 772                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
 773                 sme_deauth(wpa_s);
 774         }
 775 }
 776
 777
 778 void sme_state_changed(struct wpa_supplicant *wpa_s)
 779 {
 780         /* Make sure timers are cleaned up appropriately. */
 781         if (wpa_s->wpa_state != WPA_ASSOCIATING)
 782                 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 783         if (wpa_s->wpa_state != WPA_AUTHENTICATING)
 784                 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 785 }
 786
 787
 788 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
 789                                        const u8 *prev_pending_bssid)
 790 {
 791         /*
 792          * mac80211-workaround to force deauth on failed auth cmd,
 793          * requires us to remain in authenticating state to allow the
 794          * second authentication attempt to be continued properly.
 795          */
 796         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
 797                 "to proceed after disconnection event");
 798         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 799         os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
 800
 801         /*
 802          * Re-arm authentication timer in case auth fails for whatever reason.
 803          */
 804         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 805         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 806                                NULL);
 807 }
 808
 809
 810 void sme_deinit(struct wpa_supplicant *wpa_s)
 811 {
 812         os_free(wpa_s->sme.ft_ies);
 813         wpa_s->sme.ft_ies = NULL;
 814         wpa_s->sme.ft_ies_len = 0;
 815 #ifdef CONFIG_IEEE80211W
 816         sme_stop_sa_query(wpa_s);
 817 #endif /* CONFIG_IEEE80211W */
 818 #ifdef CONFIG_SAE
 819         wpabuf_free(wpa_s->sme.sae_token);
 820         wpa_s->sme.sae_token = NULL;
 821         sae_clear_data(&wpa_s->sme.sae);
 822 #endif /* CONFIG_SAE */
 823
 824         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 825         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 826         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
 827 }
 828
 829
 830 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
 831                                    const u8 *chan_list, u8 num_channels,
 832                                    u8 num_intol)
 833 {
 834         struct ieee80211_2040_bss_coex_ie *bc_ie;
 835         struct ieee80211_2040_intol_chan_report *ic_report;
 836         struct wpabuf *buf;
 837
 838         wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR,
 839                    MAC2STR(wpa_s->bssid));
 840
 841         buf = wpabuf_alloc(2 + /* action.category + action_code */
 842                            sizeof(struct ieee80211_2040_bss_coex_ie) +
 843                            sizeof(struct ieee80211_2040_intol_chan_report) +
 844                            num_channels);
 845         if (buf == NULL)
 846                 return;
 847
 848         wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
 849         wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
 850
 851         bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
 852         bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
 853         bc_ie->length = 1;
 854         if (num_intol)
 855                 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
 856
 857         if (num_channels > 0) {
 858                 ic_report = wpabuf_put(buf, sizeof(*ic_report));
 859                 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
 860                 ic_report->length = num_channels + 1;
 861                 ic_report->op_class = 0;
 862                 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
 863                           num_channels);
 864         }
 865
 866         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
 867                                 wpa_s->own_addr, wpa_s->bssid,
 868                                 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
 869                 wpa_msg(wpa_s, MSG_INFO,
 870                         "SME: Failed to send 20/40 BSS Coexistence frame");
 871         }
 872
 873         wpabuf_free(buf);
 874 }
 875
 876
 877 /**
 878  * enum wpas_band - Frequency band
 879  * @WPAS_BAND_2GHZ: 2.4 GHz ISM band
 880  * @WPAS_BAND_5GHZ: around 5 GHz band (4.9 - 5.7 GHz)
 881  */
 882 enum wpas_band {
 883         WPAS_BAND_2GHZ,
 884         WPAS_BAND_5GHZ,
 885         WPAS_BAND_INVALID
 886 };
 887
 888 /**
 889  * freq_to_channel - Convert frequency into channel info
 890  * @channel: Buffer for returning channel number
 891  * Returns: Band (2 or 5 GHz)
 892  */
 893 static enum wpas_band freq_to_channel(int freq, u8 *channel)
 894 {
 895         enum wpas_band band = (freq <= 2484) ? WPAS_BAND_2GHZ : WPAS_BAND_5GHZ;
 896         u8 chan = 0;
 897
 898         if (freq >= 2412 && freq <= 2472)
 899                 chan = (freq - 2407) / 5;
 900         else if (freq == 2484)
 901                 chan = 14;
 902         else if (freq >= 5180 && freq <= 5805)
 903                 chan = (freq - 5000) / 5;
 904
 905         *channel = chan;
 906         return band;
 907 }
 908
 909
 910 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
 911 {
 912         struct wpa_bss *bss;
 913         const u8 *ie;
 914         u16 ht_cap;
 915         u8 chan_list[P2P_MAX_CHANNELS], channel;
 916         u8 num_channels = 0, num_intol = 0, i;
 917
 918         if (!wpa_s->sme.sched_obss_scan)
 919                 return 0;
 920
 921         wpa_s->sme.sched_obss_scan = 0;
 922         if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
 923                 return 1;
 924
 925         /*
 926          * Check whether AP uses regulatory triplet or channel triplet in
 927          * country info. Right now the operating class of the BSS channel
 928          * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
 929          * based on the assumption that operating class triplet is not used in
 930          * beacon frame. If the First Channel Number/Operating Extension
 931          * Identifier octet has a positive integer value of 201 or greater,
 932          * then its operating class triplet.
 933          *
 934          * TODO: If Supported Operating Classes element is present in beacon
 935          * frame, have to lookup operating class in Annex E and fill them in
 936          * 2040 coex frame.
 937          */
 938         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
 939         if (ie && (ie[1] >= 6) && (ie[5] >= 201))
 940                 return 1;
 941
 942         os_memset(chan_list, 0, sizeof(chan_list));
 943
 944         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
 945                 /* Skip other band bss */
 946                 if (freq_to_channel(bss->freq, &channel) != WPAS_BAND_2GHZ)
 947                         continue;
 948
 949                 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
 950                 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
 951
 952                 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
 953                         /* Check whether the channel is already considered */
 954                         for (i = 0; i < num_channels; i++) {
 955                                 if (channel == chan_list[i])
 956                                         break;
 957                         }
 958                         if (i != num_channels)
 959                                 continue;
 960
 961                         if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
 962                                 num_intol++;
 963
 964                         chan_list[num_channels++] = channel;
 965                 }
 966         }
 967
 968         sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
 969         return 1;
 970 }
 971
 972
 973 static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
 974                                           u16 num_modes,
 975                                           enum hostapd_hw_mode mode)
 976 {
 977         u16 i;
 978
 979         for (i = 0; i < num_modes; i++) {
 980                 if (modes[i].mode == mode)
 981                         return &modes[i];
 982         }
 983
 984         return NULL;
 985 }
 986
 987
 988 static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s,
 989                                         enum hostapd_hw_mode band,
 990                                         struct wpa_driver_scan_params *params)
 991 {
 992         /* Include only supported channels for the specified band */
 993         struct hostapd_hw_modes *mode;
 994         int count, i;
 995
 996         mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band);
 997         if (mode == NULL) {
 998                 /* No channels supported in this band - use empty list */
 999                 params->freqs = os_zalloc(sizeof(int));
1000                 return;
1001         }
1002
1003         params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
1004         if (params->freqs == NULL)
1005                 return;
1006         for (count = 0, i = 0; i < mode->num_channels; i++) {
1007                 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
1008                         continue;
1009                 params->freqs[count++] = mode->channels[i].freq;
1010         }
1011 }
1012
1013
1014 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1015 {
1016         struct wpa_supplicant *wpa_s = eloop_ctx;
1017         struct wpa_driver_scan_params params;
1018
1019         if (!wpa_s->current_bss) {
1020                 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
1021                 return;
1022         }
1023
1024         os_memset(&params, 0, sizeof(params));
1025         wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G, &params);
1026         wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
1027
1028         if (wpa_supplicant_trigger_scan(wpa_s, &params))
1029                 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
1030         else
1031                 wpa_s->sme.sched_obss_scan = 1;
1032         os_free(params.freqs);
1033
1034         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1035                                sme_obss_scan_timeout, wpa_s, NULL);
1036 }
1037
1038
1039 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
1040 {
1041         const u8 *ie;
1042         struct wpa_bss *bss = wpa_s->current_bss;
1043         struct wpa_ssid *ssid = wpa_s->current_ssid;
1044         struct hostapd_hw_modes *hw_mode = NULL;
1045         int i;
1046
1047         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1048         wpa_s->sme.sched_obss_scan = 0;
1049         if (!enable)
1050                 return;
1051
1052         /*
1053          * Schedule OBSS scan if driver is using station SME in wpa_supplicant
1054          * or it expects OBSS scan to be performed by wpa_supplicant.
1055          */
1056         if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
1057               (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
1058             ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
1059                 return;
1060
1061         if (!wpa_s->hw.modes)
1062                 return;
1063
1064         /* only HT caps in 11g mode are relevant */
1065         for (i = 0; i < wpa_s->hw.num_modes; i++) {
1066                 hw_mode = &wpa_s->hw.modes[i];
1067                 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
1068                         break;
1069         }
1070
1071         /* Driver does not support HT40 for 11g or doesn't have 11g. */
1072         if (i == wpa_s->hw.num_modes || !hw_mode ||
1073             !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1074                 return;
1075
1076         if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
1077                 return; /* Not associated on 2.4 GHz band */
1078
1079         /* Check whether AP supports HT40 */
1080         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
1081         if (!ie || ie[1] < 2 ||
1082             !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1083                 return; /* AP does not support HT40 */
1084
1085         ie = wpa_bss_get_ie(wpa_s->current_bss,
1086                             WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
1087         if (!ie || ie[1] < 14)
1088                 return; /* AP does not request OBSS scans */
1089
1090         wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
1091         if (wpa_s->sme.obss_scan_int < 10) {
1092                 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
1093                            "replaced with the minimum 10 sec",
1094                            wpa_s->sme.obss_scan_int);
1095                 wpa_s->sme.obss_scan_int = 10;
1096         }
1097         wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
1098                    wpa_s->sme.obss_scan_int);
1099         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1100                                sme_obss_scan_timeout, wpa_s, NULL);
1101 }
1102
1103
1104 #ifdef CONFIG_IEEE80211W
1105
1106 static const unsigned int sa_query_max_timeout = 1000;
1107 static const unsigned int sa_query_retry_timeout = 201;
1108
1109 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
1110 {
1111         u32 tu;
1112         struct os_time now, passed;
1113         os_get_time(&now);
1114         os_time_sub(&now, &wpa_s->sme.sa_query_start, &passed);
1115         tu = (passed.sec * 1000000 + passed.usec) / 1024;
1116         if (sa_query_max_timeout < tu) {
1117                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
1118                 sme_stop_sa_query(wpa_s);
1119                 wpa_supplicant_deauthenticate(
1120                         wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
1121                 return 1;
1122         }
1123
1124         return 0;
1125 }
1126
1127
1128 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
1129                                   const u8 *trans_id)
1130 {
1131         u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
1132         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
1133                 MACSTR, MAC2STR(wpa_s->bssid));
1134         wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
1135                     trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1136         req[0] = WLAN_ACTION_SA_QUERY;
1137         req[1] = WLAN_SA_QUERY_REQUEST;
1138         os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1139         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1140                                 wpa_s->own_addr, wpa_s->bssid,
1141                                 req, sizeof(req), 0) < 0)
1142                 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
1143                         "Request");
1144 }
1145
1146
1147 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
1148 {
1149         struct wpa_supplicant *wpa_s = eloop_ctx;
1150         unsigned int timeout, sec, usec;
1151         u8 *trans_id, *nbuf;
1152
1153         if (wpa_s->sme.sa_query_count > 0 &&
1154             sme_check_sa_query_timeout(wpa_s))
1155                 return;
1156
1157         nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
1158                                 wpa_s->sme.sa_query_count + 1,
1159                                 WLAN_SA_QUERY_TR_ID_LEN);
1160         if (nbuf == NULL)
1161                 return;
1162         if (wpa_s->sme.sa_query_count == 0) {
1163                 /* Starting a new SA Query procedure */
1164                 os_get_time(&wpa_s->sme.sa_query_start);
1165         }
1166         trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
1167         wpa_s->sme.sa_query_trans_id = nbuf;
1168         wpa_s->sme.sa_query_count++;
1169
1170         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1171
1172         timeout = sa_query_retry_timeout;
1173         sec = ((timeout / 1000) * 1024) / 1000;
1174         usec = (timeout % 1000) * 1024;
1175         eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
1176
1177         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
1178                 wpa_s->sme.sa_query_count);
1179
1180         sme_send_sa_query_req(wpa_s, trans_id);
1181 }
1182
1183
1184 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
1185 {
1186         sme_sa_query_timer(wpa_s, NULL);
1187 }
1188
1189
1190 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
1191 {
1192         eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
1193         os_free(wpa_s->sme.sa_query_trans_id);
1194         wpa_s->sme.sa_query_trans_id = NULL;
1195         wpa_s->sme.sa_query_count = 0;
1196 }
1197
1198
1199 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1200                                  const u8 *da, u16 reason_code)
1201 {
1202         struct wpa_ssid *ssid;
1203
1204         if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME))
1205                 return;
1206         if (wpa_s->wpa_state != WPA_COMPLETED)
1207                 return;
1208         ssid = wpa_s->current_ssid;
1209         if (ssid == NULL ||
1210             (ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
1211              wpa_s->conf->pmf : ssid->ieee80211w) == NO_MGMT_FRAME_PROTECTION)
1212                 return;
1213         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1214                 return;
1215         if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1216             reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1217                 return;
1218         if (wpa_s->sme.sa_query_count > 0)
1219                 return;
1220
1221         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1222                 "possible AP/STA state mismatch - trigger SA Query");
1223         sme_start_sa_query(wpa_s);
1224 }
1225
1226
1227 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1228                      const u8 *data, size_t len)
1229 {
1230         int i;
1231
1232         if (wpa_s->sme.sa_query_trans_id == NULL ||
1233             len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1234             data[0] != WLAN_SA_QUERY_RESPONSE)
1235                 return;
1236         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1237                 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1238
1239         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1240                 return;
1241
1242         for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1243                 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1244                               i * WLAN_SA_QUERY_TR_ID_LEN,
1245                               data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1246                         break;
1247         }
1248
1249         if (i >= wpa_s->sme.sa_query_count) {
1250                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1251                         "transaction identifier found");
1252                 return;
1253         }
1254
1255         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1256                 "from " MACSTR, MAC2STR(sa));
1257         sme_stop_sa_query(wpa_s);
1258 }
1259
1260 #endif /* CONFIG_IEEE80211W */