contrib/wpa/wpa_supplicant/sme.c

   1 /*
   2  * wpa_supplicant - SME
   3  * Copyright (c) 2009-2010, 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 "rsn_supp/wpa.h"
  18 #include "rsn_supp/pmksa_cache.h"
  19 #include "config.h"
  20 #include "wpa_supplicant_i.h"
  21 #include "driver_i.h"
  22 #include "wpas_glue.h"
  23 #include "wps_supplicant.h"
  24 #include "p2p_supplicant.h"
  25 #include "notify.h"
  26 #include "bss.h"
  27 #include "scan.h"
  28 #include "sme.h"
  29 #include "hs20_supplicant.h"
  30
  31 #define SME_AUTH_TIMEOUT 5
  32 #define SME_ASSOC_TIMEOUT 5
  33
  34 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx);
  35 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx);
  36 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx);
  37 #ifdef CONFIG_IEEE80211W
  38 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s);
  39 #endif /* CONFIG_IEEE80211W */
  40
  41
  42 #ifdef CONFIG_SAE
  43
  44 static struct wpabuf * sme_auth_build_sae_commit(struct wpa_supplicant *wpa_s)
  45 {
  46         struct wpabuf *buf;
  47
  48         buf = wpabuf_alloc(4 + 2);
  49         if (buf == NULL)
  50                 return NULL;
  51
  52         wpabuf_put_le16(buf, 1); /* Transaction seq# */
  53         wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
  54         wpabuf_put_le16(buf, 19); /* Finite Cyclic Group */
  55         /* TODO: Anti-Clogging Token (if requested) */
  56         /* TODO: Scalar */
  57         /* TODO: Element */
  58
  59         return buf;
  60 }
  61
  62
  63 static struct wpabuf * sme_auth_build_sae_confirm(struct wpa_supplicant *wpa_s)
  64 {
  65         struct wpabuf *buf;
  66
  67         buf = wpabuf_alloc(4 + 2);
  68         if (buf == NULL)
  69                 return NULL;
  70
  71         wpabuf_put_le16(buf, 2); /* Transaction seq# */
  72         wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
  73         wpabuf_put_le16(buf, wpa_s->sme.sae_send_confirm);
  74         wpa_s->sme.sae_send_confirm++;
  75         /* TODO: Confirm */
  76
  77         return buf;
  78 }
  79
  80 #endif /* CONFIG_SAE */
  81
  82
  83 static void sme_send_authentication(struct wpa_supplicant *wpa_s,
  84                                     struct wpa_bss *bss, struct wpa_ssid *ssid,
  85                                     int start)
  86 {
  87         struct wpa_driver_auth_params params;
  88         struct wpa_ssid *old_ssid;
  89 #ifdef CONFIG_IEEE80211R
  90         const u8 *ie;
  91 #endif /* CONFIG_IEEE80211R */
  92 #ifdef CONFIG_IEEE80211R
  93         const u8 *md = NULL;
  94 #endif /* CONFIG_IEEE80211R */
  95         int i, bssid_changed;
  96         struct wpabuf *resp = NULL;
  97         u8 ext_capab[10];
  98         int ext_capab_len;
  99
 100         if (bss == NULL) {
 101                 wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for "
 102                         "the network");
 103                 return;
 104         }
 105
 106         wpa_s->current_bss = bss;
 107
 108         os_memset(&params, 0, sizeof(params));
 109         wpa_s->reassociate = 0;
 110
 111         params.freq = bss->freq;
 112         params.bssid = bss->bssid;
 113         params.ssid = bss->ssid;
 114         params.ssid_len = bss->ssid_len;
 115         params.p2p = ssid->p2p_group;
 116
 117         if (wpa_s->sme.ssid_len != params.ssid_len ||
 118             os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
 119                 wpa_s->sme.prev_bssid_set = 0;
 120
 121         wpa_s->sme.freq = params.freq;
 122         os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
 123         wpa_s->sme.ssid_len = params.ssid_len;
 124
 125         params.auth_alg = WPA_AUTH_ALG_OPEN;
 126 #ifdef IEEE8021X_EAPOL
 127         if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
 128                 if (ssid->leap) {
 129                         if (ssid->non_leap == 0)
 130                                 params.auth_alg = WPA_AUTH_ALG_LEAP;
 131                         else
 132                                 params.auth_alg |= WPA_AUTH_ALG_LEAP;
 133                 }
 134         }
 135 #endif /* IEEE8021X_EAPOL */
 136         wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
 137                 params.auth_alg);
 138         if (ssid->auth_alg) {
 139                 params.auth_alg = ssid->auth_alg;
 140                 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
 141                         "0x%x", params.auth_alg);
 142         }
 143 #ifdef CONFIG_SAE
 144         if (wpa_key_mgmt_sae(ssid->key_mgmt)) {
 145                 const u8 *rsn;
 146                 struct wpa_ie_data ied;
 147
 148                 rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 149                 if (rsn &&
 150                     wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0) {
 151                         if (wpa_key_mgmt_sae(ied.key_mgmt)) {
 152                                 wpa_dbg(wpa_s, MSG_DEBUG, "Using SAE auth_alg");
 153                                 params.auth_alg = WPA_AUTH_ALG_SAE;
 154                         }
 155                 }
 156         }
 157 #endif /* CONFIG_SAE */
 158
 159         for (i = 0; i < NUM_WEP_KEYS; i++) {
 160                 if (ssid->wep_key_len[i])
 161                         params.wep_key[i] = ssid->wep_key[i];
 162                 params.wep_key_len[i] = ssid->wep_key_len[i];
 163         }
 164         params.wep_tx_keyidx = ssid->wep_tx_keyidx;
 165
 166         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 167         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 168         os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
 169         if (bssid_changed)
 170                 wpas_notify_bssid_changed(wpa_s);
 171
 172         if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
 173              wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
 174             wpa_key_mgmt_wpa(ssid->key_mgmt)) {
 175                 int try_opportunistic;
 176                 try_opportunistic = (ssid->proactive_key_caching < 0 ?
 177                                      wpa_s->conf->okc :
 178                                      ssid->proactive_key_caching) &&
 179                         (ssid->proto & WPA_PROTO_RSN);
 180                 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
 181                                             wpa_s->current_ssid,
 182                                             try_opportunistic) == 0)
 183                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
 184                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 185                 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
 186                                               wpa_s->sme.assoc_req_ie,
 187                                               &wpa_s->sme.assoc_req_ie_len)) {
 188                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 189                                 "key management and encryption suites");
 190                         return;
 191                 }
 192         } else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
 193                    wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) {
 194                 /*
 195                  * Both WPA and non-WPA IEEE 802.1X enabled in configuration -
 196                  * use non-WPA since the scan results did not indicate that the
 197                  * AP is using WPA or WPA2.
 198                  */
 199                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 200                 wpa_s->sme.assoc_req_ie_len = 0;
 201         } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
 202                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 203                 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
 204                                               wpa_s->sme.assoc_req_ie,
 205                                               &wpa_s->sme.assoc_req_ie_len)) {
 206                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 207                                 "key management and encryption suites (no "
 208                                 "scan results)");
 209                         return;
 210                 }
 211 #ifdef CONFIG_WPS
 212         } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 213                 struct wpabuf *wps_ie;
 214                 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
 215                 if (wps_ie && wpabuf_len(wps_ie) <=
 216                     sizeof(wpa_s->sme.assoc_req_ie)) {
 217                         wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
 218                         os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
 219                                   wpa_s->sme.assoc_req_ie_len);
 220                 } else
 221                         wpa_s->sme.assoc_req_ie_len = 0;
 222                 wpabuf_free(wps_ie);
 223                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 224 #endif /* CONFIG_WPS */
 225         } else {
 226                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 227                 wpa_s->sme.assoc_req_ie_len = 0;
 228         }
 229
 230 #ifdef CONFIG_IEEE80211R
 231         ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
 232         if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
 233                 md = ie + 2;
 234         wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
 235         if (md) {
 236                 /* Prepare for the next transition */
 237                 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
 238         }
 239
 240         if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) {
 241                 if (wpa_s->sme.assoc_req_ie_len + 5 <
 242                     sizeof(wpa_s->sme.assoc_req_ie)) {
 243                         struct rsn_mdie *mdie;
 244                         u8 *pos = wpa_s->sme.assoc_req_ie +
 245                                 wpa_s->sme.assoc_req_ie_len;
 246                         *pos++ = WLAN_EID_MOBILITY_DOMAIN;
 247                         *pos++ = sizeof(*mdie);
 248                         mdie = (struct rsn_mdie *) pos;
 249                         os_memcpy(mdie->mobility_domain, md,
 250                                   MOBILITY_DOMAIN_ID_LEN);
 251                         mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
 252                         wpa_s->sme.assoc_req_ie_len += 5;
 253                 }
 254
 255                 if (wpa_s->sme.ft_used &&
 256                     os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
 257                     wpa_sm_has_ptk(wpa_s->wpa)) {
 258                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT "
 259                                 "over-the-air");
 260                         params.auth_alg = WPA_AUTH_ALG_FT;
 261                         params.ie = wpa_s->sme.ft_ies;
 262                         params.ie_len = wpa_s->sme.ft_ies_len;
 263                 }
 264         }
 265 #endif /* CONFIG_IEEE80211R */
 266
 267 #ifdef CONFIG_IEEE80211W
 268         wpa_s->sme.mfp = ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
 269                 wpa_s->conf->pmf : ssid->ieee80211w;
 270         if (wpa_s->sme.mfp != NO_MGMT_FRAME_PROTECTION) {
 271                 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 272                 struct wpa_ie_data _ie;
 273                 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
 274                     _ie.capabilities &
 275                     (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
 276                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
 277                                 "MFP: require MFP");
 278                         wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
 279                 }
 280         }
 281 #endif /* CONFIG_IEEE80211W */
 282
 283 #ifdef CONFIG_P2P
 284         if (wpa_s->global->p2p) {
 285                 u8 *pos;
 286                 size_t len;
 287                 int res;
 288                 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
 289                 len = sizeof(wpa_s->sme.assoc_req_ie) -
 290                         wpa_s->sme.assoc_req_ie_len;
 291                 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
 292                                             ssid->p2p_group);
 293                 if (res >= 0)
 294                         wpa_s->sme.assoc_req_ie_len += res;
 295         }
 296 #endif /* CONFIG_P2P */
 297
 298 #ifdef CONFIG_HS20
 299         if (wpa_s->conf->hs20) {
 300                 struct wpabuf *hs20;
 301                 hs20 = wpabuf_alloc(20);
 302                 if (hs20) {
 303                         wpas_hs20_add_indication(hs20);
 304                         os_memcpy(wpa_s->sme.assoc_req_ie +
 305                                   wpa_s->sme.assoc_req_ie_len,
 306                                   wpabuf_head(hs20), wpabuf_len(hs20));
 307                         wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
 308                         wpabuf_free(hs20);
 309                 }
 310         }
 311 #endif /* CONFIG_HS20 */
 312
 313         ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab);
 314         if (ext_capab_len > 0) {
 315                 u8 *pos = wpa_s->sme.assoc_req_ie;
 316                 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
 317                         pos += 2 + pos[1];
 318                 os_memmove(pos + ext_capab_len, pos,
 319                            wpa_s->sme.assoc_req_ie_len -
 320                            (pos - wpa_s->sme.assoc_req_ie));
 321                 wpa_s->sme.assoc_req_ie_len += ext_capab_len;
 322                 os_memcpy(pos, ext_capab, ext_capab_len);
 323         }
 324
 325 #ifdef CONFIG_SAE
 326         if (params.auth_alg == WPA_AUTH_ALG_SAE) {
 327                 if (start)
 328                         resp = sme_auth_build_sae_commit(wpa_s);
 329                 else
 330                         resp = sme_auth_build_sae_confirm(wpa_s);
 331                 if (resp == NULL)
 332                         return;
 333                 params.sae_data = wpabuf_head(resp);
 334                 params.sae_data_len = wpabuf_len(resp);
 335                 wpa_s->sme.sae_state = start ? SME_SAE_COMMIT : SME_SAE_CONFIRM;
 336         }
 337 #endif /* CONFIG_SAE */
 338
 339         wpa_supplicant_cancel_sched_scan(wpa_s);
 340         wpa_supplicant_cancel_scan(wpa_s);
 341
 342         wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
 343                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 344                 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
 345
 346         wpa_clear_keys(wpa_s, bss->bssid);
 347         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 348         old_ssid = wpa_s->current_ssid;
 349         wpa_s->current_ssid = ssid;
 350         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
 351         wpa_supplicant_initiate_eapol(wpa_s);
 352         if (old_ssid != wpa_s->current_ssid)
 353                 wpas_notify_network_changed(wpa_s);
 354
 355         wpa_s->sme.auth_alg = params.auth_alg;
 356         if (wpa_drv_authenticate(wpa_s, &params) < 0) {
 357                 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
 358                         "driver failed");
 359                 wpas_connection_failed(wpa_s, bss->bssid);
 360                 wpa_supplicant_mark_disassoc(wpa_s);
 361                 wpabuf_free(resp);
 362                 return;
 363         }
 364
 365         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 366                                NULL);
 367
 368         /*
 369          * Association will be started based on the authentication event from
 370          * the driver.
 371          */
 372
 373         wpabuf_free(resp);
 374 }
 375
 376
 377 void sme_authenticate(struct wpa_supplicant *wpa_s,
 378                       struct wpa_bss *bss, struct wpa_ssid *ssid)
 379 {
 380         wpa_s->sme.sae_state = SME_SAE_INIT;
 381         wpa_s->sme.sae_send_confirm = 0;
 382         sme_send_authentication(wpa_s, bss, ssid, 1);
 383 }
 384
 385
 386 #ifdef CONFIG_SAE
 387
 388 static int sme_sae_process_commit(struct wpa_supplicant *wpa_s, const u8 *data,
 389                                   size_t len)
 390 {
 391         /* Check Finite Cyclic Group */
 392         if (len < 2)
 393                 return -1;
 394         if (WPA_GET_LE16(data) != 19) {
 395                 wpa_printf(MSG_DEBUG, "SAE: Unsupported Finite Cyclic Group %u",
 396                            WPA_GET_LE16(data));
 397                 return -1;
 398         }
 399
 400         /* TODO */
 401
 402         return 0;
 403 }
 404
 405
 406 static int sme_sae_process_confirm(struct wpa_supplicant *wpa_s, const u8 *data,
 407                                    size_t len)
 408 {
 409         u16 rc;
 410
 411         if (len < 2)
 412                 return -1;
 413         rc = WPA_GET_LE16(data);
 414         wpa_printf(MSG_DEBUG, "SAE: peer-send-confirm %u", rc);
 415
 416         /* TODO */
 417         return 0;
 418 }
 419
 420
 421 static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
 422                         u16 status_code, const u8 *data, size_t len)
 423 {
 424         wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
 425                 "status code %u", auth_transaction, status_code);
 426         wpa_hexdump(MSG_DEBUG, "SME: SAE fields", data, len);
 427
 428         if (status_code != WLAN_STATUS_SUCCESS)
 429                 return -1;
 430
 431         if (auth_transaction == 1) {
 432                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
 433                 if (wpa_s->current_bss == NULL ||
 434                     wpa_s->current_ssid == NULL)
 435                         return -1;
 436                 if (wpa_s->sme.sae_state != SME_SAE_COMMIT)
 437                         return -1;
 438                 if (sme_sae_process_commit(wpa_s, data, len) < 0)
 439                         return -1;
 440                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 441                                         wpa_s->current_ssid, 0);
 442                 return 0;
 443         } else if (auth_transaction == 2) {
 444                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
 445                 if (wpa_s->sme.sae_state != SME_SAE_CONFIRM)
 446                         return -1;
 447                 if (sme_sae_process_confirm(wpa_s, data, len) < 0)
 448                         return -1;
 449                 return 1;
 450         }
 451
 452         return -1;
 453 }
 454 #endif /* CONFIG_SAE */
 455
 456
 457 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
 458 {
 459         struct wpa_ssid *ssid = wpa_s->current_ssid;
 460
 461         if (ssid == NULL) {
 462                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 463                         "when network is not selected");
 464                 return;
 465         }
 466
 467         if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
 468                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 469                         "when not in authenticating state");
 470                 return;
 471         }
 472
 473         if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
 474                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
 475                         "unexpected peer " MACSTR,
 476                         MAC2STR(data->auth.peer));
 477                 return;
 478         }
 479
 480         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
 481                 " auth_type=%d auth_transaction=%d status_code=%d",
 482                 MAC2STR(data->auth.peer), data->auth.auth_type,
 483                 data->auth.auth_transaction, data->auth.status_code);
 484         wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
 485                     data->auth.ies, data->auth.ies_len);
 486
 487         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 488
 489 #ifdef CONFIG_SAE
 490         if (data->auth.auth_type == WLAN_AUTH_SAE) {
 491                 int res;
 492                 res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
 493                                    data->auth.status_code, data->auth.ies,
 494                                    data->auth.ies_len);
 495                 if (res < 0) {
 496                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 497                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 498
 499                 }
 500                 if (res != 1)
 501                         return;
 502         }
 503 #endif /* CONFIG_SAE */
 504
 505         if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
 506                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
 507                         "code %d)", data->auth.status_code);
 508
 509                 if (data->auth.status_code !=
 510                     WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
 511                     wpa_s->sme.auth_alg == data->auth.auth_type ||
 512                     wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
 513                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 514                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 515                         return;
 516                 }
 517
 518                 switch (data->auth.auth_type) {
 519                 case WLAN_AUTH_OPEN:
 520                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 521
 522                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
 523                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 524                                                  wpa_s->current_ssid);
 525                         return;
 526
 527                 case WLAN_AUTH_SHARED_KEY:
 528                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
 529
 530                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
 531                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 532                                                  wpa_s->current_ssid);
 533                         return;
 534
 535                 default:
 536                         return;
 537                 }
 538         }
 539
 540 #ifdef CONFIG_IEEE80211R
 541         if (data->auth.auth_type == WLAN_AUTH_FT) {
 542                 union wpa_event_data edata;
 543                 os_memset(&edata, 0, sizeof(edata));
 544                 edata.ft_ies.ies = data->auth.ies;
 545                 edata.ft_ies.ies_len = data->auth.ies_len;
 546                 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
 547                 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
 548         }
 549 #endif /* CONFIG_IEEE80211R */
 550
 551         sme_associate(wpa_s, ssid->mode, data->auth.peer,
 552                       data->auth.auth_type);
 553 }
 554
 555
 556 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
 557                    const u8 *bssid, u16 auth_type)
 558 {
 559         struct wpa_driver_associate_params params;
 560         struct ieee802_11_elems elems;
 561 #ifdef CONFIG_HT_OVERRIDES
 562         struct ieee80211_ht_capabilities htcaps;
 563         struct ieee80211_ht_capabilities htcaps_mask;
 564 #endif /* CONFIG_HT_OVERRIDES */
 565
 566         os_memset(&params, 0, sizeof(params));
 567         params.bssid = bssid;
 568         params.ssid = wpa_s->sme.ssid;
 569         params.ssid_len = wpa_s->sme.ssid_len;
 570         params.freq = wpa_s->sme.freq;
 571         params.bg_scan_period = wpa_s->current_ssid ?
 572                 wpa_s->current_ssid->bg_scan_period : -1;
 573         params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
 574                 wpa_s->sme.assoc_req_ie : NULL;
 575         params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
 576         params.pairwise_suite = cipher_suite2driver(wpa_s->pairwise_cipher);
 577         params.group_suite = cipher_suite2driver(wpa_s->group_cipher);
 578 #ifdef CONFIG_HT_OVERRIDES
 579         os_memset(&htcaps, 0, sizeof(htcaps));
 580         os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
 581         params.htcaps = (u8 *) &htcaps;
 582         params.htcaps_mask = (u8 *) &htcaps_mask;
 583         wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, &params);
 584 #endif /* CONFIG_HT_OVERRIDES */
 585 #ifdef CONFIG_IEEE80211R
 586         if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
 587                 params.wpa_ie = wpa_s->sme.ft_ies;
 588                 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
 589         }
 590 #endif /* CONFIG_IEEE80211R */
 591         params.mode = mode;
 592         params.mgmt_frame_protection = wpa_s->sme.mfp;
 593         if (wpa_s->sme.prev_bssid_set)
 594                 params.prev_bssid = wpa_s->sme.prev_bssid;
 595
 596         wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
 597                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 598                 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
 599                 params.freq);
 600
 601         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
 602
 603         if (params.wpa_ie == NULL ||
 604             ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
 605             < 0) {
 606                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
 607                 os_memset(&elems, 0, sizeof(elems));
 608         }
 609         if (elems.rsn_ie) {
 610                 params.wpa_proto = WPA_PROTO_RSN;
 611                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
 612                                         elems.rsn_ie_len + 2);
 613         } else if (elems.wpa_ie) {
 614                 params.wpa_proto = WPA_PROTO_WPA;
 615                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
 616                                         elems.wpa_ie_len + 2);
 617         } else
 618                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 619         if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
 620                 params.p2p = 1;
 621
 622         if (wpa_s->parent->set_sta_uapsd)
 623                 params.uapsd = wpa_s->parent->sta_uapsd;
 624         else
 625                 params.uapsd = -1;
 626
 627         if (wpa_drv_associate(wpa_s, &params) < 0) {
 628                 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
 629                         "driver failed");
 630                 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 631                 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 632                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 633                 return;
 634         }
 635
 636         eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
 637                                NULL);
 638 }
 639
 640
 641 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
 642                       const u8 *ies, size_t ies_len)
 643 {
 644         if (md == NULL || ies == NULL) {
 645                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
 646                 os_free(wpa_s->sme.ft_ies);
 647                 wpa_s->sme.ft_ies = NULL;
 648                 wpa_s->sme.ft_ies_len = 0;
 649                 wpa_s->sme.ft_used = 0;
 650                 return 0;
 651         }
 652
 653         os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
 654         wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
 655         os_free(wpa_s->sme.ft_ies);
 656         wpa_s->sme.ft_ies = os_malloc(ies_len);
 657         if (wpa_s->sme.ft_ies == NULL)
 658                 return -1;
 659         os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
 660         wpa_s->sme.ft_ies_len = ies_len;
 661         return 0;
 662 }
 663
 664
 665 static void sme_deauth(struct wpa_supplicant *wpa_s)
 666 {
 667         int bssid_changed;
 668
 669         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 670
 671         if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
 672                                    WLAN_REASON_DEAUTH_LEAVING) < 0) {
 673                 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
 674                         "failed");
 675         }
 676         wpa_s->sme.prev_bssid_set = 0;
 677
 678         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 679         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 680         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 681         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 682         if (bssid_changed)
 683                 wpas_notify_bssid_changed(wpa_s);
 684 }
 685
 686
 687 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
 688                             union wpa_event_data *data)
 689 {
 690         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
 691                 "status code %d", MAC2STR(wpa_s->pending_bssid),
 692                 data->assoc_reject.status_code);
 693
 694         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 695
 696         /*
 697          * For now, unconditionally terminate the previous authentication. In
 698          * theory, this should not be needed, but mac80211 gets quite confused
 699          * if the authentication is left pending.. Some roaming cases might
 700          * benefit from using the previous authentication, so this could be
 701          * optimized in the future.
 702          */
 703         sme_deauth(wpa_s);
 704 }
 705
 706
 707 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
 708                               union wpa_event_data *data)
 709 {
 710         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
 711         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 712         wpa_supplicant_mark_disassoc(wpa_s);
 713 }
 714
 715
 716 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
 717                                union wpa_event_data *data)
 718 {
 719         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
 720         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 721         wpa_supplicant_mark_disassoc(wpa_s);
 722 }
 723
 724
 725 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
 726                         union wpa_event_data *data)
 727 {
 728         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
 729         if (wpa_s->sme.prev_bssid_set) {
 730                 /*
 731                  * cfg80211/mac80211 can get into somewhat confused state if
 732                  * the AP only disassociates us and leaves us in authenticated
 733                  * state. For now, force the state to be cleared to avoid
 734                  * confusing errors if we try to associate with the AP again.
 735                  */
 736                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
 737                         "driver state");
 738                 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
 739                                        WLAN_REASON_DEAUTH_LEAVING);
 740         }
 741 }
 742
 743
 744 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
 745 {
 746         struct wpa_supplicant *wpa_s = eloop_ctx;
 747         if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
 748                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
 749                 sme_deauth(wpa_s);
 750         }
 751 }
 752
 753
 754 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
 755 {
 756         struct wpa_supplicant *wpa_s = eloop_ctx;
 757         if (wpa_s->wpa_state == WPA_ASSOCIATING) {
 758                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
 759                 sme_deauth(wpa_s);
 760         }
 761 }
 762
 763
 764 void sme_state_changed(struct wpa_supplicant *wpa_s)
 765 {
 766         /* Make sure timers are cleaned up appropriately. */
 767         if (wpa_s->wpa_state != WPA_ASSOCIATING)
 768                 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 769         if (wpa_s->wpa_state != WPA_AUTHENTICATING)
 770                 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 771 }
 772
 773
 774 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
 775                                        const u8 *prev_pending_bssid)
 776 {
 777         /*
 778          * mac80211-workaround to force deauth on failed auth cmd,
 779          * requires us to remain in authenticating state to allow the
 780          * second authentication attempt to be continued properly.
 781          */
 782         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
 783                 "to proceed after disconnection event");
 784         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 785         os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
 786
 787         /*
 788          * Re-arm authentication timer in case auth fails for whatever reason.
 789          */
 790         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 791         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 792                                NULL);
 793 }
 794
 795
 796 void sme_deinit(struct wpa_supplicant *wpa_s)
 797 {
 798         os_free(wpa_s->sme.ft_ies);
 799         wpa_s->sme.ft_ies = NULL;
 800         wpa_s->sme.ft_ies_len = 0;
 801 #ifdef CONFIG_IEEE80211W
 802         sme_stop_sa_query(wpa_s);
 803 #endif /* CONFIG_IEEE80211W */
 804
 805         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 806         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 807         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
 808 }
 809
 810
 811 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
 812                                    const u8 *chan_list, u8 num_channels,
 813                                    u8 num_intol)
 814 {
 815         struct ieee80211_2040_bss_coex_ie *bc_ie;
 816         struct ieee80211_2040_intol_chan_report *ic_report;
 817         struct wpabuf *buf;
 818
 819         wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR,
 820                    MAC2STR(wpa_s->bssid));
 821
 822         buf = wpabuf_alloc(2 + /* action.category + action_code */
 823                            sizeof(struct ieee80211_2040_bss_coex_ie) +
 824                            sizeof(struct ieee80211_2040_intol_chan_report) +
 825                            num_channels);
 826         if (buf == NULL)
 827                 return;
 828
 829         wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
 830         wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
 831
 832         bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
 833         bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
 834         bc_ie->length = 1;
 835         if (num_intol)
 836                 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
 837
 838         if (num_channels > 0) {
 839                 ic_report = wpabuf_put(buf, sizeof(*ic_report));
 840                 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
 841                 ic_report->length = num_channels + 1;
 842                 ic_report->op_class = 0;
 843                 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
 844                           num_channels);
 845         }
 846
 847         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
 848                                 wpa_s->own_addr, wpa_s->bssid,
 849                                 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
 850                 wpa_msg(wpa_s, MSG_INFO,
 851                         "SME: Failed to send 20/40 BSS Coexistence frame");
 852         }
 853
 854         wpabuf_free(buf);
 855 }
 856
 857
 858 /**
 859  * enum wpas_band - Frequency band
 860  * @WPAS_BAND_2GHZ: 2.4 GHz ISM band
 861  * @WPAS_BAND_5GHZ: around 5 GHz band (4.9 - 5.7 GHz)
 862  */
 863 enum wpas_band {
 864         WPAS_BAND_2GHZ,
 865         WPAS_BAND_5GHZ,
 866         WPAS_BAND_INVALID
 867 };
 868
 869 /**
 870  * freq_to_channel - Convert frequency into channel info
 871  * @channel: Buffer for returning channel number
 872  * Returns: Band (2 or 5 GHz)
 873  */
 874 static enum wpas_band freq_to_channel(int freq, u8 *channel)
 875 {
 876         enum wpas_band band = (freq <= 2484) ? WPAS_BAND_2GHZ : WPAS_BAND_5GHZ;
 877         u8 chan = 0;
 878
 879         if (freq >= 2412 && freq <= 2472)
 880                 chan = (freq - 2407) / 5;
 881         else if (freq == 2484)
 882                 chan = 14;
 883         else if (freq >= 5180 && freq <= 5805)
 884                 chan = (freq - 5000) / 5;
 885
 886         *channel = chan;
 887         return band;
 888 }
 889
 890
 891 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
 892 {
 893         struct wpa_bss *bss;
 894         const u8 *ie;
 895         u16 ht_cap;
 896         u8 chan_list[P2P_MAX_CHANNELS], channel;
 897         u8 num_channels = 0, num_intol = 0, i;
 898
 899         if (!wpa_s->sme.sched_obss_scan)
 900                 return 0;
 901
 902         wpa_s->sme.sched_obss_scan = 0;
 903         if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
 904                 return 1;
 905
 906         /*
 907          * Check whether AP uses regulatory triplet or channel triplet in
 908          * country info. Right now the operating class of the BSS channel
 909          * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
 910          * based on the assumption that operating class triplet is not used in
 911          * beacon frame. If the First Channel Number/Operating Extension
 912          * Identifier octet has a positive integer value of 201 or greater,
 913          * then its operating class triplet.
 914          *
 915          * TODO: If Supported Operating Classes element is present in beacon
 916          * frame, have to lookup operating class in Annex E and fill them in
 917          * 2040 coex frame.
 918          */
 919         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
 920         if (ie && (ie[1] >= 6) && (ie[5] >= 201))
 921                 return 1;
 922
 923         os_memset(chan_list, 0, sizeof(chan_list));
 924
 925         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
 926                 /* Skip other band bss */
 927                 if (freq_to_channel(bss->freq, &channel) != WPAS_BAND_2GHZ)
 928                         continue;
 929
 930                 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
 931                 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
 932
 933                 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
 934                         /* Check whether the channel is already considered */
 935                         for (i = 0; i < num_channels; i++) {
 936                                 if (channel == chan_list[i])
 937                                         break;
 938                         }
 939                         if (i != num_channels)
 940                                 continue;
 941
 942                         if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
 943                                 num_intol++;
 944
 945                         chan_list[num_channels++] = channel;
 946                 }
 947         }
 948
 949         sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
 950         return 1;
 951 }
 952
 953
 954 static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
 955                                           u16 num_modes,
 956                                           enum hostapd_hw_mode mode)
 957 {
 958         u16 i;
 959
 960         for (i = 0; i < num_modes; i++) {
 961                 if (modes[i].mode == mode)
 962                         return &modes[i];
 963         }
 964
 965         return NULL;
 966 }
 967
 968
 969 static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s,
 970                                         enum hostapd_hw_mode band,
 971                                         struct wpa_driver_scan_params *params)
 972 {
 973         /* Include only supported channels for the specified band */
 974         struct hostapd_hw_modes *mode;
 975         int count, i;
 976
 977         mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band);
 978         if (mode == NULL) {
 979                 /* No channels supported in this band - use empty list */
 980                 params->freqs = os_zalloc(sizeof(int));
 981                 return;
 982         }
 983
 984         params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
 985         if (params->freqs == NULL)
 986                 return;
 987         for (count = 0, i = 0; i < mode->num_channels; i++) {
 988                 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
 989                         continue;
 990                 params->freqs[count++] = mode->channels[i].freq;
 991         }
 992 }
 993
 994
 995 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
 996 {
 997         struct wpa_supplicant *wpa_s = eloop_ctx;
 998         struct wpa_driver_scan_params params;
 999
1000         if (!wpa_s->current_bss) {
1001                 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
1002                 return;
1003         }
1004
1005         os_memset(&params, 0, sizeof(params));
1006         wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G, &params);
1007         wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
1008
1009         if (wpa_supplicant_trigger_scan(wpa_s, &params))
1010                 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
1011         else
1012                 wpa_s->sme.sched_obss_scan = 1;
1013         os_free(params.freqs);
1014
1015         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1016                                sme_obss_scan_timeout, wpa_s, NULL);
1017 }
1018
1019
1020 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
1021 {
1022         const u8 *ie;
1023         struct wpa_bss *bss = wpa_s->current_bss;
1024         struct wpa_ssid *ssid = wpa_s->current_ssid;
1025         struct hostapd_hw_modes *hw_mode = NULL;
1026         int i;
1027
1028         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1029         wpa_s->sme.sched_obss_scan = 0;
1030         if (!enable)
1031                 return;
1032
1033         /*
1034          * Schedule OBSS scan if driver is using station SME in wpa_supplicant
1035          * or it expects OBSS scan to be performed by wpa_supplicant.
1036          */
1037         if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
1038               (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
1039             ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
1040                 return;
1041
1042         if (!wpa_s->hw.modes)
1043                 return;
1044
1045         /* only HT caps in 11g mode are relevant */
1046         for (i = 0; i < wpa_s->hw.num_modes; i++) {
1047                 hw_mode = &wpa_s->hw.modes[i];
1048                 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
1049                         break;
1050         }
1051
1052         /* Driver does not support HT40 for 11g or doesn't have 11g. */
1053         if (i == wpa_s->hw.num_modes || !hw_mode ||
1054             !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1055                 return;
1056
1057         if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
1058                 return; /* Not associated on 2.4 GHz band */
1059
1060         /* Check whether AP supports HT40 */
1061         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
1062         if (!ie || ie[1] < 2 ||
1063             !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1064                 return; /* AP does not support HT40 */
1065
1066         ie = wpa_bss_get_ie(wpa_s->current_bss,
1067                             WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
1068         if (!ie || ie[1] < 14)
1069                 return; /* AP does not request OBSS scans */
1070
1071         wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
1072         if (wpa_s->sme.obss_scan_int < 10) {
1073                 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
1074                            "replaced with the minimum 10 sec",
1075                            wpa_s->sme.obss_scan_int);
1076                 wpa_s->sme.obss_scan_int = 10;
1077         }
1078         wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
1079                    wpa_s->sme.obss_scan_int);
1080         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1081                                sme_obss_scan_timeout, wpa_s, NULL);
1082 }
1083
1084
1085 #ifdef CONFIG_IEEE80211W
1086
1087 static const unsigned int sa_query_max_timeout = 1000;
1088 static const unsigned int sa_query_retry_timeout = 201;
1089
1090 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
1091 {
1092         u32 tu;
1093         struct os_time now, passed;
1094         os_get_time(&now);
1095         os_time_sub(&now, &wpa_s->sme.sa_query_start, &passed);
1096         tu = (passed.sec * 1000000 + passed.usec) / 1024;
1097         if (sa_query_max_timeout < tu) {
1098                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
1099                 sme_stop_sa_query(wpa_s);
1100                 wpa_supplicant_deauthenticate(
1101                         wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
1102                 return 1;
1103         }
1104
1105         return 0;
1106 }
1107
1108
1109 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
1110                                   const u8 *trans_id)
1111 {
1112         u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
1113         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
1114                 MACSTR, MAC2STR(wpa_s->bssid));
1115         wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
1116                     trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1117         req[0] = WLAN_ACTION_SA_QUERY;
1118         req[1] = WLAN_SA_QUERY_REQUEST;
1119         os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1120         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1121                                 wpa_s->own_addr, wpa_s->bssid,
1122                                 req, sizeof(req), 0) < 0)
1123                 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
1124                         "Request");
1125 }
1126
1127
1128 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
1129 {
1130         struct wpa_supplicant *wpa_s = eloop_ctx;
1131         unsigned int timeout, sec, usec;
1132         u8 *trans_id, *nbuf;
1133
1134         if (wpa_s->sme.sa_query_count > 0 &&
1135             sme_check_sa_query_timeout(wpa_s))
1136                 return;
1137
1138         nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
1139                                 wpa_s->sme.sa_query_count + 1,
1140                                 WLAN_SA_QUERY_TR_ID_LEN);
1141         if (nbuf == NULL)
1142                 return;
1143         if (wpa_s->sme.sa_query_count == 0) {
1144                 /* Starting a new SA Query procedure */
1145                 os_get_time(&wpa_s->sme.sa_query_start);
1146         }
1147         trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
1148         wpa_s->sme.sa_query_trans_id = nbuf;
1149         wpa_s->sme.sa_query_count++;
1150
1151         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1152
1153         timeout = sa_query_retry_timeout;
1154         sec = ((timeout / 1000) * 1024) / 1000;
1155         usec = (timeout % 1000) * 1024;
1156         eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
1157
1158         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
1159                 wpa_s->sme.sa_query_count);
1160
1161         sme_send_sa_query_req(wpa_s, trans_id);
1162 }
1163
1164
1165 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
1166 {
1167         sme_sa_query_timer(wpa_s, NULL);
1168 }
1169
1170
1171 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
1172 {
1173         eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
1174         os_free(wpa_s->sme.sa_query_trans_id);
1175         wpa_s->sme.sa_query_trans_id = NULL;
1176         wpa_s->sme.sa_query_count = 0;
1177 }
1178
1179
1180 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1181                                  const u8 *da, u16 reason_code)
1182 {
1183         struct wpa_ssid *ssid;
1184
1185         if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME))
1186                 return;
1187         if (wpa_s->wpa_state != WPA_COMPLETED)
1188                 return;
1189         ssid = wpa_s->current_ssid;
1190         if (ssid == NULL ||
1191             (ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
1192              wpa_s->conf->pmf : ssid->ieee80211w) == NO_MGMT_FRAME_PROTECTION)
1193                 return;
1194         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1195                 return;
1196         if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1197             reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1198                 return;
1199         if (wpa_s->sme.sa_query_count > 0)
1200                 return;
1201
1202         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1203                 "possible AP/STA state mismatch - trigger SA Query");
1204         sme_start_sa_query(wpa_s);
1205 }
1206
1207
1208 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1209                      const u8 *data, size_t len)
1210 {
1211         int i;
1212
1213         if (wpa_s->sme.sa_query_trans_id == NULL ||
1214             len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1215             data[0] != WLAN_SA_QUERY_RESPONSE)
1216                 return;
1217         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1218                 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1219
1220         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1221                 return;
1222
1223         for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1224                 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1225                               i * WLAN_SA_QUERY_TR_ID_LEN,
1226                               data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1227                         break;
1228         }
1229
1230         if (i >= wpa_s->sme.sa_query_count) {
1231                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1232                         "transaction identifier found");
1233                 return;
1234         }
1235
1236         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1237                 "from " MACSTR, MAC2STR(sa));
1238         sme_stop_sa_query(wpa_s);
1239 }
1240
1241 #endif /* CONFIG_IEEE80211W */