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 + 4);
  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_str(buf, "TEST");
  55         /* TODO: full SAE commit */
  56
  57         return buf;
  58 }
  59
  60
  61 static struct wpabuf * sme_auth_build_sae_confirm(struct wpa_supplicant *wpa_s)
  62 {
  63         struct wpabuf *buf;
  64
  65         buf = wpabuf_alloc(4 + 4);
  66         if (buf == NULL)
  67                 return NULL;
  68
  69         wpabuf_put_le16(buf, 2); /* Transaction seq# */
  70         wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
  71         wpabuf_put_str(buf, "TEST");
  72         /* TODO: full SAE confirm */
  73
  74         return buf;
  75 }
  76
  77 #endif /* CONFIG_SAE */
  78
  79
  80 void sme_send_authentication(struct wpa_supplicant *wpa_s,
  81                              struct wpa_bss *bss, struct wpa_ssid *ssid,
  82                              int start)
  83 {
  84         struct wpa_driver_auth_params params;
  85         struct wpa_ssid *old_ssid;
  86 #ifdef CONFIG_IEEE80211R
  87         const u8 *ie;
  88 #endif /* CONFIG_IEEE80211R */
  89 #ifdef CONFIG_IEEE80211R
  90         const u8 *md = NULL;
  91 #endif /* CONFIG_IEEE80211R */
  92         int i, bssid_changed;
  93         struct wpabuf *resp = NULL;
  94
  95         if (bss == NULL) {
  96                 wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for "
  97                         "the network");
  98                 return;
  99         }
 100
 101         wpa_s->current_bss = bss;
 102
 103         os_memset(&params, 0, sizeof(params));
 104         wpa_s->reassociate = 0;
 105
 106         params.freq = bss->freq;
 107         params.bssid = bss->bssid;
 108         params.ssid = bss->ssid;
 109         params.ssid_len = bss->ssid_len;
 110         params.p2p = ssid->p2p_group;
 111
 112         if (wpa_s->sme.ssid_len != params.ssid_len ||
 113             os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
 114                 wpa_s->sme.prev_bssid_set = 0;
 115
 116         wpa_s->sme.freq = params.freq;
 117         os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
 118         wpa_s->sme.ssid_len = params.ssid_len;
 119
 120         params.auth_alg = WPA_AUTH_ALG_OPEN;
 121 #ifdef IEEE8021X_EAPOL
 122         if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
 123                 if (ssid->leap) {
 124                         if (ssid->non_leap == 0)
 125                                 params.auth_alg = WPA_AUTH_ALG_LEAP;
 126                         else
 127                                 params.auth_alg |= WPA_AUTH_ALG_LEAP;
 128                 }
 129         }
 130 #endif /* IEEE8021X_EAPOL */
 131         wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
 132                 params.auth_alg);
 133         if (ssid->auth_alg) {
 134                 params.auth_alg = ssid->auth_alg;
 135                 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
 136                         "0x%x", params.auth_alg);
 137         }
 138 #ifdef CONFIG_SAE
 139         if (wpa_key_mgmt_sae(ssid->key_mgmt)) {
 140                 const u8 *rsn;
 141                 struct wpa_ie_data ied;
 142
 143                 rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 144                 if (rsn &&
 145                     wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0) {
 146                         if (wpa_key_mgmt_sae(ied.key_mgmt)) {
 147                                 wpa_dbg(wpa_s, MSG_DEBUG, "Using SAE auth_alg");
 148                                 params.auth_alg = WPA_AUTH_ALG_SAE;
 149                         }
 150                 }
 151         }
 152 #endif /* CONFIG_SAE */
 153
 154         for (i = 0; i < NUM_WEP_KEYS; i++) {
 155                 if (ssid->wep_key_len[i])
 156                         params.wep_key[i] = ssid->wep_key[i];
 157                 params.wep_key_len[i] = ssid->wep_key_len[i];
 158         }
 159         params.wep_tx_keyidx = ssid->wep_tx_keyidx;
 160
 161         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 162         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 163         os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
 164         if (bssid_changed)
 165                 wpas_notify_bssid_changed(wpa_s);
 166
 167         if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
 168              wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
 169             wpa_key_mgmt_wpa(ssid->key_mgmt)) {
 170                 int try_opportunistic;
 171                 try_opportunistic = ssid->proactive_key_caching &&
 172                         (ssid->proto & WPA_PROTO_RSN);
 173                 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
 174                                             wpa_s->current_ssid,
 175                                             try_opportunistic) == 0)
 176                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
 177                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 178                 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
 179                                               wpa_s->sme.assoc_req_ie,
 180                                               &wpa_s->sme.assoc_req_ie_len)) {
 181                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 182                                 "key management and encryption suites");
 183                         return;
 184                 }
 185         } else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
 186                    wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) {
 187                 /*
 188                  * Both WPA and non-WPA IEEE 802.1X enabled in configuration -
 189                  * use non-WPA since the scan results did not indicate that the
 190                  * AP is using WPA or WPA2.
 191                  */
 192                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 193                 wpa_s->sme.assoc_req_ie_len = 0;
 194         } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
 195                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 196                 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
 197                                               wpa_s->sme.assoc_req_ie,
 198                                               &wpa_s->sme.assoc_req_ie_len)) {
 199                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 200                                 "key management and encryption suites (no "
 201                                 "scan results)");
 202                         return;
 203                 }
 204 #ifdef CONFIG_WPS
 205         } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 206                 struct wpabuf *wps_ie;
 207                 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
 208                 if (wps_ie && wpabuf_len(wps_ie) <=
 209                     sizeof(wpa_s->sme.assoc_req_ie)) {
 210                         wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
 211                         os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
 212                                   wpa_s->sme.assoc_req_ie_len);
 213                 } else
 214                         wpa_s->sme.assoc_req_ie_len = 0;
 215                 wpabuf_free(wps_ie);
 216                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 217 #endif /* CONFIG_WPS */
 218         } else {
 219                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 220                 wpa_s->sme.assoc_req_ie_len = 0;
 221         }
 222
 223 #ifdef CONFIG_IEEE80211R
 224         ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
 225         if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
 226                 md = ie + 2;
 227         wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
 228         if (md) {
 229                 /* Prepare for the next transition */
 230                 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
 231         }
 232
 233         if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) {
 234                 if (wpa_s->sme.assoc_req_ie_len + 5 <
 235                     sizeof(wpa_s->sme.assoc_req_ie)) {
 236                         struct rsn_mdie *mdie;
 237                         u8 *pos = wpa_s->sme.assoc_req_ie +
 238                                 wpa_s->sme.assoc_req_ie_len;
 239                         *pos++ = WLAN_EID_MOBILITY_DOMAIN;
 240                         *pos++ = sizeof(*mdie);
 241                         mdie = (struct rsn_mdie *) pos;
 242                         os_memcpy(mdie->mobility_domain, md,
 243                                   MOBILITY_DOMAIN_ID_LEN);
 244                         mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
 245                         wpa_s->sme.assoc_req_ie_len += 5;
 246                 }
 247
 248                 if (wpa_s->sme.ft_used &&
 249                     os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
 250                     wpa_sm_has_ptk(wpa_s->wpa)) {
 251                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT "
 252                                 "over-the-air");
 253                         params.auth_alg = WPA_AUTH_ALG_FT;
 254                         params.ie = wpa_s->sme.ft_ies;
 255                         params.ie_len = wpa_s->sme.ft_ies_len;
 256                 }
 257         }
 258 #endif /* CONFIG_IEEE80211R */
 259
 260 #ifdef CONFIG_IEEE80211W
 261         wpa_s->sme.mfp = ssid->ieee80211w;
 262         if (ssid->ieee80211w != NO_MGMT_FRAME_PROTECTION) {
 263                 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 264                 struct wpa_ie_data _ie;
 265                 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
 266                     _ie.capabilities &
 267                     (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
 268                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
 269                                 "MFP: require MFP");
 270                         wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
 271                 }
 272         }
 273 #endif /* CONFIG_IEEE80211W */
 274
 275 #ifdef CONFIG_P2P
 276         if (wpa_s->global->p2p) {
 277                 u8 *pos;
 278                 size_t len;
 279                 int res;
 280                 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
 281                 len = sizeof(wpa_s->sme.assoc_req_ie) -
 282                         wpa_s->sme.assoc_req_ie_len;
 283                 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
 284                                             ssid->p2p_group);
 285                 if (res >= 0)
 286                         wpa_s->sme.assoc_req_ie_len += res;
 287         }
 288 #endif /* CONFIG_P2P */
 289
 290 #ifdef CONFIG_HS20
 291         if (wpa_s->conf->hs20) {
 292                 struct wpabuf *hs20;
 293                 hs20 = wpabuf_alloc(20);
 294                 if (hs20) {
 295                         wpas_hs20_add_indication(hs20);
 296                         os_memcpy(wpa_s->sme.assoc_req_ie +
 297                                   wpa_s->sme.assoc_req_ie_len,
 298                                   wpabuf_head(hs20), wpabuf_len(hs20));
 299                         wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
 300                         wpabuf_free(hs20);
 301                 }
 302         }
 303 #endif /* CONFIG_HS20 */
 304
 305 #ifdef CONFIG_INTERWORKING
 306         if (wpa_s->conf->interworking) {
 307                 u8 *pos = wpa_s->sme.assoc_req_ie;
 308                 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
 309                         pos += 2 + pos[1];
 310                 os_memmove(pos + 6, pos,
 311                            wpa_s->sme.assoc_req_ie_len -
 312                            (pos - wpa_s->sme.assoc_req_ie));
 313                 wpa_s->sme.assoc_req_ie_len += 6;
 314                 *pos++ = WLAN_EID_EXT_CAPAB;
 315                 *pos++ = 4;
 316                 *pos++ = 0x00;
 317                 *pos++ = 0x00;
 318                 *pos++ = 0x00;
 319                 *pos++ = 0x80; /* Bit 31 - Interworking */
 320         }
 321 #endif /* CONFIG_INTERWORKING */
 322
 323 #ifdef CONFIG_SAE
 324         if (params.auth_alg == WPA_AUTH_ALG_SAE) {
 325                 if (start)
 326                         resp = sme_auth_build_sae_commit(wpa_s);
 327                 else
 328                         resp = sme_auth_build_sae_confirm(wpa_s);
 329                 if (resp == NULL)
 330                         return;
 331                 params.sae_data = wpabuf_head(resp);
 332                 params.sae_data_len = wpabuf_len(resp);
 333         }
 334 #endif /* CONFIG_SAE */
 335
 336         wpa_supplicant_cancel_sched_scan(wpa_s);
 337         wpa_supplicant_cancel_scan(wpa_s);
 338
 339         wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
 340                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 341                 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
 342
 343         wpa_clear_keys(wpa_s, bss->bssid);
 344         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 345         old_ssid = wpa_s->current_ssid;
 346         wpa_s->current_ssid = ssid;
 347         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
 348         wpa_supplicant_initiate_eapol(wpa_s);
 349         if (old_ssid != wpa_s->current_ssid)
 350                 wpas_notify_network_changed(wpa_s);
 351
 352         wpa_s->sme.auth_alg = params.auth_alg;
 353         if (wpa_drv_authenticate(wpa_s, &params) < 0) {
 354                 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
 355                         "driver failed");
 356                 wpas_connection_failed(wpa_s, bss->bssid);
 357                 wpa_supplicant_mark_disassoc(wpa_s);
 358                 wpabuf_free(resp);
 359                 return;
 360         }
 361
 362         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 363                                NULL);
 364
 365         /*
 366          * Association will be started based on the authentication event from
 367          * the driver.
 368          */
 369
 370         wpabuf_free(resp);
 371 }
 372
 373
 374 void sme_authenticate(struct wpa_supplicant *wpa_s,
 375                       struct wpa_bss *bss, struct wpa_ssid *ssid)
 376 {
 377         sme_send_authentication(wpa_s, bss, ssid, 1);
 378 }
 379
 380
 381 #ifdef CONFIG_SAE
 382 static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
 383                         u16 status_code, const u8 *data, size_t len)
 384 {
 385         wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
 386                 "status code %u", auth_transaction, status_code);
 387         wpa_hexdump(MSG_DEBUG, "SME: SAE fields", data, len);
 388
 389         if (status_code != WLAN_STATUS_SUCCESS)
 390                 return -1;
 391
 392         if (auth_transaction == 1) {
 393                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
 394                 if (wpa_s->current_bss == NULL ||
 395                     wpa_s->current_ssid == NULL)
 396                         return -1;
 397                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 398                                         wpa_s->current_ssid, 0);
 399                 return 0;
 400         } else if (auth_transaction == 2) {
 401                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
 402                 return 1;
 403         }
 404
 405         return -1;
 406 }
 407 #endif /* CONFIG_SAE */
 408
 409
 410 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
 411 {
 412         struct wpa_ssid *ssid = wpa_s->current_ssid;
 413
 414         if (ssid == NULL) {
 415                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 416                         "when network is not selected");
 417                 return;
 418         }
 419
 420         if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
 421                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 422                         "when not in authenticating state");
 423                 return;
 424         }
 425
 426         if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
 427                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
 428                         "unexpected peer " MACSTR,
 429                         MAC2STR(data->auth.peer));
 430                 return;
 431         }
 432
 433         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
 434                 " auth_type=%d auth_transaction=%d status_code=%d",
 435                 MAC2STR(data->auth.peer), data->auth.auth_type,
 436                 data->auth.auth_transaction, data->auth.status_code);
 437         wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
 438                     data->auth.ies, data->auth.ies_len);
 439
 440         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 441
 442 #ifdef CONFIG_SAE
 443         if (data->auth.auth_type == WLAN_AUTH_SAE) {
 444                 if (sme_sae_auth(wpa_s, data->auth.auth_transaction,
 445                                  data->auth.status_code, data->auth.ies,
 446                                  data->auth.ies_len) != 1)
 447                         return;
 448         }
 449 #endif /* CONFIG_SAE */
 450
 451         if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
 452                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
 453                         "code %d)", data->auth.status_code);
 454
 455                 if (data->auth.status_code !=
 456                     WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
 457                     wpa_s->sme.auth_alg == data->auth.auth_type ||
 458                     wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
 459                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 460                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 461                         return;
 462                 }
 463
 464                 switch (data->auth.auth_type) {
 465                 case WLAN_AUTH_OPEN:
 466                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 467
 468                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
 469                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 470                                                  wpa_s->current_ssid);
 471                         return;
 472
 473                 case WLAN_AUTH_SHARED_KEY:
 474                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
 475
 476                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
 477                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 478                                                  wpa_s->current_ssid);
 479                         return;
 480
 481                 default:
 482                         return;
 483                 }
 484         }
 485
 486 #ifdef CONFIG_IEEE80211R
 487         if (data->auth.auth_type == WLAN_AUTH_FT) {
 488                 union wpa_event_data edata;
 489                 os_memset(&edata, 0, sizeof(edata));
 490                 edata.ft_ies.ies = data->auth.ies;
 491                 edata.ft_ies.ies_len = data->auth.ies_len;
 492                 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
 493                 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
 494         }
 495 #endif /* CONFIG_IEEE80211R */
 496
 497         sme_associate(wpa_s, ssid->mode, data->auth.peer,
 498                       data->auth.auth_type);
 499 }
 500
 501
 502 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
 503                    const u8 *bssid, u16 auth_type)
 504 {
 505         struct wpa_driver_associate_params params;
 506         struct ieee802_11_elems elems;
 507 #ifdef CONFIG_HT_OVERRIDES
 508         struct ieee80211_ht_capabilities htcaps;
 509         struct ieee80211_ht_capabilities htcaps_mask;
 510 #endif /* CONFIG_HT_OVERRIDES */
 511
 512         os_memset(&params, 0, sizeof(params));
 513         params.bssid = bssid;
 514         params.ssid = wpa_s->sme.ssid;
 515         params.ssid_len = wpa_s->sme.ssid_len;
 516         params.freq = wpa_s->sme.freq;
 517         params.bg_scan_period = wpa_s->current_ssid ?
 518                 wpa_s->current_ssid->bg_scan_period : -1;
 519         params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
 520                 wpa_s->sme.assoc_req_ie : NULL;
 521         params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
 522         params.pairwise_suite = cipher_suite2driver(wpa_s->pairwise_cipher);
 523         params.group_suite = cipher_suite2driver(wpa_s->group_cipher);
 524 #ifdef CONFIG_HT_OVERRIDES
 525         os_memset(&htcaps, 0, sizeof(htcaps));
 526         os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
 527         params.htcaps = (u8 *) &htcaps;
 528         params.htcaps_mask = (u8 *) &htcaps_mask;
 529         wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, &params);
 530 #endif /* CONFIG_HT_OVERRIDES */
 531 #ifdef CONFIG_IEEE80211R
 532         if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
 533                 params.wpa_ie = wpa_s->sme.ft_ies;
 534                 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
 535         }
 536 #endif /* CONFIG_IEEE80211R */
 537         params.mode = mode;
 538         params.mgmt_frame_protection = wpa_s->sme.mfp;
 539         if (wpa_s->sme.prev_bssid_set)
 540                 params.prev_bssid = wpa_s->sme.prev_bssid;
 541
 542         wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
 543                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 544                 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
 545                 params.freq);
 546
 547         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
 548
 549         if (params.wpa_ie == NULL ||
 550             ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
 551             < 0) {
 552                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
 553                 os_memset(&elems, 0, sizeof(elems));
 554         }
 555         if (elems.rsn_ie) {
 556                 params.wpa_proto = WPA_PROTO_RSN;
 557                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
 558                                         elems.rsn_ie_len + 2);
 559         } else if (elems.wpa_ie) {
 560                 params.wpa_proto = WPA_PROTO_WPA;
 561                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
 562                                         elems.wpa_ie_len + 2);
 563         } else
 564                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 565         if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
 566                 params.p2p = 1;
 567
 568         if (wpa_s->parent->set_sta_uapsd)
 569                 params.uapsd = wpa_s->parent->sta_uapsd;
 570         else
 571                 params.uapsd = -1;
 572
 573         if (wpa_drv_associate(wpa_s, &params) < 0) {
 574                 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
 575                         "driver failed");
 576                 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 577                 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 578                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 579                 return;
 580         }
 581
 582         eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
 583                                NULL);
 584 }
 585
 586
 587 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
 588                       const u8 *ies, size_t ies_len)
 589 {
 590         if (md == NULL || ies == NULL) {
 591                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
 592                 os_free(wpa_s->sme.ft_ies);
 593                 wpa_s->sme.ft_ies = NULL;
 594                 wpa_s->sme.ft_ies_len = 0;
 595                 wpa_s->sme.ft_used = 0;
 596                 return 0;
 597         }
 598
 599         os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
 600         wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
 601         os_free(wpa_s->sme.ft_ies);
 602         wpa_s->sme.ft_ies = os_malloc(ies_len);
 603         if (wpa_s->sme.ft_ies == NULL)
 604                 return -1;
 605         os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
 606         wpa_s->sme.ft_ies_len = ies_len;
 607         return 0;
 608 }
 609
 610
 611 static void sme_deauth(struct wpa_supplicant *wpa_s)
 612 {
 613         int bssid_changed;
 614
 615         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 616
 617         if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
 618                                    WLAN_REASON_DEAUTH_LEAVING) < 0) {
 619                 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
 620                         "failed");
 621         }
 622         wpa_s->sme.prev_bssid_set = 0;
 623
 624         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 625         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 626         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 627         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 628         if (bssid_changed)
 629                 wpas_notify_bssid_changed(wpa_s);
 630 }
 631
 632
 633 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
 634                             union wpa_event_data *data)
 635 {
 636         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
 637                 "status code %d", MAC2STR(wpa_s->pending_bssid),
 638                 data->assoc_reject.status_code);
 639
 640         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 641
 642         /*
 643          * For now, unconditionally terminate the previous authentication. In
 644          * theory, this should not be needed, but mac80211 gets quite confused
 645          * if the authentication is left pending.. Some roaming cases might
 646          * benefit from using the previous authentication, so this could be
 647          * optimized in the future.
 648          */
 649         sme_deauth(wpa_s);
 650 }
 651
 652
 653 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
 654                               union wpa_event_data *data)
 655 {
 656         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
 657         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 658         wpa_supplicant_mark_disassoc(wpa_s);
 659 }
 660
 661
 662 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
 663                                union wpa_event_data *data)
 664 {
 665         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
 666         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 667         wpa_supplicant_mark_disassoc(wpa_s);
 668 }
 669
 670
 671 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
 672                         union wpa_event_data *data)
 673 {
 674         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
 675         if (wpa_s->sme.prev_bssid_set) {
 676                 /*
 677                  * cfg80211/mac80211 can get into somewhat confused state if
 678                  * the AP only disassociates us and leaves us in authenticated
 679                  * state. For now, force the state to be cleared to avoid
 680                  * confusing errors if we try to associate with the AP again.
 681                  */
 682                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
 683                         "driver state");
 684                 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
 685                                        WLAN_REASON_DEAUTH_LEAVING);
 686         }
 687 }
 688
 689
 690 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
 691 {
 692         struct wpa_supplicant *wpa_s = eloop_ctx;
 693         if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
 694                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
 695                 sme_deauth(wpa_s);
 696         }
 697 }
 698
 699
 700 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
 701 {
 702         struct wpa_supplicant *wpa_s = eloop_ctx;
 703         if (wpa_s->wpa_state == WPA_ASSOCIATING) {
 704                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
 705                 sme_deauth(wpa_s);
 706         }
 707 }
 708
 709
 710 void sme_state_changed(struct wpa_supplicant *wpa_s)
 711 {
 712         /* Make sure timers are cleaned up appropriately. */
 713         if (wpa_s->wpa_state != WPA_ASSOCIATING)
 714                 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 715         if (wpa_s->wpa_state != WPA_AUTHENTICATING)
 716                 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 717 }
 718
 719
 720 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
 721                                        const u8 *prev_pending_bssid)
 722 {
 723         /*
 724          * mac80211-workaround to force deauth on failed auth cmd,
 725          * requires us to remain in authenticating state to allow the
 726          * second authentication attempt to be continued properly.
 727          */
 728         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
 729                 "to proceed after disconnection event");
 730         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 731         os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
 732
 733         /*
 734          * Re-arm authentication timer in case auth fails for whatever reason.
 735          */
 736         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 737         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 738                                NULL);
 739 }
 740
 741
 742 void sme_deinit(struct wpa_supplicant *wpa_s)
 743 {
 744         os_free(wpa_s->sme.ft_ies);
 745         wpa_s->sme.ft_ies = NULL;
 746         wpa_s->sme.ft_ies_len = 0;
 747 #ifdef CONFIG_IEEE80211W
 748         sme_stop_sa_query(wpa_s);
 749 #endif /* CONFIG_IEEE80211W */
 750
 751         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 752         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 753         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
 754 }
 755
 756
 757 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
 758                                    const u8 *chan_list, u8 num_channels,
 759                                    u8 num_intol)
 760 {
 761         struct ieee80211_2040_bss_coex_ie *bc_ie;
 762         struct ieee80211_2040_intol_chan_report *ic_report;
 763         struct wpabuf *buf;
 764
 765         wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR,
 766                    MAC2STR(wpa_s->bssid));
 767
 768         buf = wpabuf_alloc(2 + /* action.category + action_code */
 769                            sizeof(struct ieee80211_2040_bss_coex_ie) +
 770                            sizeof(struct ieee80211_2040_intol_chan_report) +
 771                            num_channels);
 772         if (buf == NULL)
 773                 return;
 774
 775         wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
 776         wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
 777
 778         bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
 779         bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
 780         bc_ie->length = 1;
 781         if (num_intol)
 782                 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
 783
 784         if (num_channels > 0) {
 785                 ic_report = wpabuf_put(buf, sizeof(*ic_report));
 786                 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
 787                 ic_report->length = num_channels + 1;
 788                 ic_report->op_class = 0;
 789                 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
 790                           num_channels);
 791         }
 792
 793         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
 794                                 wpa_s->own_addr, wpa_s->bssid,
 795                                 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
 796                 wpa_msg(wpa_s, MSG_INFO,
 797                         "SME: Failed to send 20/40 BSS Coexistence frame");
 798         }
 799
 800         wpabuf_free(buf);
 801 }
 802
 803
 804 /**
 805  * enum wpas_band - Frequency band
 806  * @WPAS_BAND_2GHZ: 2.4 GHz ISM band
 807  * @WPAS_BAND_5GHZ: around 5 GHz band (4.9 - 5.7 GHz)
 808  */
 809 enum wpas_band {
 810         WPAS_BAND_2GHZ,
 811         WPAS_BAND_5GHZ,
 812         WPAS_BAND_INVALID
 813 };
 814
 815 /**
 816  * freq_to_channel - Convert frequency into channel info
 817  * @channel: Buffer for returning channel number
 818  * Returns: Band (2 or 5 GHz)
 819  */
 820 static enum wpas_band freq_to_channel(int freq, u8 *channel)
 821 {
 822         enum wpas_band band = (freq <= 2484) ? WPAS_BAND_2GHZ : WPAS_BAND_5GHZ;
 823         u8 chan = 0;
 824
 825         if (freq >= 2412 && freq <= 2472)
 826                 chan = (freq - 2407) / 5;
 827         else if (freq == 2484)
 828                 chan = 14;
 829         else if (freq >= 5180 && freq <= 5805)
 830                 chan = (freq - 5000) / 5;
 831
 832         *channel = chan;
 833         return band;
 834 }
 835
 836
 837 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
 838 {
 839         struct wpa_bss *bss;
 840         const u8 *ie;
 841         u16 ht_cap;
 842         u8 chan_list[P2P_MAX_CHANNELS], channel;
 843         u8 num_channels = 0, num_intol = 0, i;
 844
 845         if (!wpa_s->sme.sched_obss_scan)
 846                 return 0;
 847
 848         wpa_s->sme.sched_obss_scan = 0;
 849         if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
 850                 return 1;
 851
 852         /*
 853          * Check whether AP uses regulatory triplet or channel triplet in
 854          * country info. Right now the operating class of the BSS channel
 855          * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
 856          * based on the assumption that operating class triplet is not used in
 857          * beacon frame. If the First Channel Number/Operating Extension
 858          * Identifier octet has a positive integer value of 201 or greater,
 859          * then its operating class triplet.
 860          *
 861          * TODO: If Supported Operating Classes element is present in beacon
 862          * frame, have to lookup operating class in Annex E and fill them in
 863          * 2040 coex frame.
 864          */
 865         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
 866         if (ie && (ie[1] >= 6) && (ie[5] >= 201))
 867                 return 1;
 868
 869         os_memset(chan_list, 0, sizeof(chan_list));
 870
 871         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
 872                 /* Skip other band bss */
 873                 if (freq_to_channel(bss->freq, &channel) != WPAS_BAND_2GHZ)
 874                         continue;
 875
 876                 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
 877                 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
 878
 879                 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
 880                         /* Check whether the channel is already considered */
 881                         for (i = 0; i < num_channels; i++) {
 882                                 if (channel == chan_list[i])
 883                                         break;
 884                         }
 885                         if (i != num_channels)
 886                                 continue;
 887
 888                         if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
 889                                 num_intol++;
 890
 891                         chan_list[num_channels++] = channel;
 892                 }
 893         }
 894
 895         sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
 896         return 1;
 897 }
 898
 899
 900 static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
 901                                           u16 num_modes,
 902                                           enum hostapd_hw_mode mode)
 903 {
 904         u16 i;
 905
 906         for (i = 0; i < num_modes; i++) {
 907                 if (modes[i].mode == mode)
 908                         return &modes[i];
 909         }
 910
 911         return NULL;
 912 }
 913
 914
 915 static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s,
 916                                         enum hostapd_hw_mode band,
 917                                         struct wpa_driver_scan_params *params)
 918 {
 919         /* Include only supported channels for the specified band */
 920         struct hostapd_hw_modes *mode;
 921         int count, i;
 922
 923         mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band);
 924         if (mode == NULL) {
 925                 /* No channels supported in this band - use empty list */
 926                 params->freqs = os_zalloc(sizeof(int));
 927                 return;
 928         }
 929
 930         params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
 931         if (params->freqs == NULL)
 932                 return;
 933         for (count = 0, i = 0; i < mode->num_channels; i++) {
 934                 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
 935                         continue;
 936                 params->freqs[count++] = mode->channels[i].freq;
 937         }
 938 }
 939
 940
 941 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
 942 {
 943         struct wpa_supplicant *wpa_s = eloop_ctx;
 944         struct wpa_driver_scan_params params;
 945
 946         if (!wpa_s->current_bss) {
 947                 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
 948                 return;
 949         }
 950
 951         os_memset(&params, 0, sizeof(params));
 952         wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G, &params);
 953         wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
 954
 955         if (wpa_supplicant_trigger_scan(wpa_s, &params))
 956                 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
 957         else
 958                 wpa_s->sme.sched_obss_scan = 1;
 959         os_free(params.freqs);
 960
 961         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
 962                                sme_obss_scan_timeout, wpa_s, NULL);
 963 }
 964
 965
 966 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
 967 {
 968         const u8 *ie;
 969         struct wpa_bss *bss = wpa_s->current_bss;
 970         struct wpa_ssid *ssid = wpa_s->current_ssid;
 971         struct hostapd_hw_modes *hw_mode = NULL;
 972         int i;
 973
 974         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
 975         wpa_s->sme.sched_obss_scan = 0;
 976         if (!enable)
 977                 return;
 978
 979         if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) || ssid == NULL ||
 980             ssid->mode != IEEE80211_MODE_INFRA)
 981                 return; /* Not using station SME in wpa_supplicant */
 982
 983         if (!wpa_s->hw.modes)
 984                 return;
 985
 986         /* only HT caps in 11g mode are relevant */
 987         for (i = 0; i < wpa_s->hw.num_modes; i++) {
 988                 hw_mode = &wpa_s->hw.modes[i];
 989                 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
 990                         break;
 991         }
 992
 993         /* Driver does not support HT40 for 11g or doesn't have 11g. */
 994         if (i == wpa_s->hw.num_modes || !hw_mode ||
 995             !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
 996                 return;
 997
 998         if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
 999                 return; /* Not associated on 2.4 GHz band */
1000
1001         /* Check whether AP supports HT40 */
1002         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
1003         if (!ie || ie[1] < 2 ||
1004             !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1005                 return; /* AP does not support HT40 */
1006
1007         ie = wpa_bss_get_ie(wpa_s->current_bss,
1008                             WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
1009         if (!ie || ie[1] < 14)
1010                 return; /* AP does not request OBSS scans */
1011
1012         wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
1013         if (wpa_s->sme.obss_scan_int < 10) {
1014                 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
1015                            "replaced with the minimum 10 sec",
1016                            wpa_s->sme.obss_scan_int);
1017                 wpa_s->sme.obss_scan_int = 10;
1018         }
1019         wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
1020                    wpa_s->sme.obss_scan_int);
1021         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1022                                sme_obss_scan_timeout, wpa_s, NULL);
1023 }
1024
1025
1026 #ifdef CONFIG_IEEE80211W
1027
1028 static const unsigned int sa_query_max_timeout = 1000;
1029 static const unsigned int sa_query_retry_timeout = 201;
1030
1031 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
1032 {
1033         u32 tu;
1034         struct os_time now, passed;
1035         os_get_time(&now);
1036         os_time_sub(&now, &wpa_s->sme.sa_query_start, &passed);
1037         tu = (passed.sec * 1000000 + passed.usec) / 1024;
1038         if (sa_query_max_timeout < tu) {
1039                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
1040                 sme_stop_sa_query(wpa_s);
1041                 wpa_supplicant_deauthenticate(
1042                         wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
1043                 return 1;
1044         }
1045
1046         return 0;
1047 }
1048
1049
1050 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
1051                                   const u8 *trans_id)
1052 {
1053         u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
1054         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
1055                 MACSTR, MAC2STR(wpa_s->bssid));
1056         wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
1057                     trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1058         req[0] = WLAN_ACTION_SA_QUERY;
1059         req[1] = WLAN_SA_QUERY_REQUEST;
1060         os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1061         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1062                                 wpa_s->own_addr, wpa_s->bssid,
1063                                 req, sizeof(req), 0) < 0)
1064                 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
1065                         "Request");
1066 }
1067
1068
1069 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
1070 {
1071         struct wpa_supplicant *wpa_s = eloop_ctx;
1072         unsigned int timeout, sec, usec;
1073         u8 *trans_id, *nbuf;
1074
1075         if (wpa_s->sme.sa_query_count > 0 &&
1076             sme_check_sa_query_timeout(wpa_s))
1077                 return;
1078
1079         nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
1080                                 wpa_s->sme.sa_query_count + 1,
1081                                 WLAN_SA_QUERY_TR_ID_LEN);
1082         if (nbuf == NULL)
1083                 return;
1084         if (wpa_s->sme.sa_query_count == 0) {
1085                 /* Starting a new SA Query procedure */
1086                 os_get_time(&wpa_s->sme.sa_query_start);
1087         }
1088         trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
1089         wpa_s->sme.sa_query_trans_id = nbuf;
1090         wpa_s->sme.sa_query_count++;
1091
1092         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1093
1094         timeout = sa_query_retry_timeout;
1095         sec = ((timeout / 1000) * 1024) / 1000;
1096         usec = (timeout % 1000) * 1024;
1097         eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
1098
1099         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
1100                 wpa_s->sme.sa_query_count);
1101
1102         sme_send_sa_query_req(wpa_s, trans_id);
1103 }
1104
1105
1106 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
1107 {
1108         sme_sa_query_timer(wpa_s, NULL);
1109 }
1110
1111
1112 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
1113 {
1114         eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
1115         os_free(wpa_s->sme.sa_query_trans_id);
1116         wpa_s->sme.sa_query_trans_id = NULL;
1117         wpa_s->sme.sa_query_count = 0;
1118 }
1119
1120
1121 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1122                                  const u8 *da, u16 reason_code)
1123 {
1124         struct wpa_ssid *ssid;
1125
1126         if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME))
1127                 return;
1128         if (wpa_s->wpa_state != WPA_COMPLETED)
1129                 return;
1130         ssid = wpa_s->current_ssid;
1131         if (ssid == NULL || ssid->ieee80211w == 0)
1132                 return;
1133         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1134                 return;
1135         if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1136             reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1137                 return;
1138         if (wpa_s->sme.sa_query_count > 0)
1139                 return;
1140
1141         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1142                 "possible AP/STA state mismatch - trigger SA Query");
1143         sme_start_sa_query(wpa_s);
1144 }
1145
1146
1147 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1148                      const u8 *data, size_t len)
1149 {
1150         int i;
1151
1152         if (wpa_s->sme.sa_query_trans_id == NULL ||
1153             len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1154             data[0] != WLAN_SA_QUERY_RESPONSE)
1155                 return;
1156         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1157                 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1158
1159         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1160                 return;
1161
1162         for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1163                 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1164                               i * WLAN_SA_QUERY_TR_ID_LEN,
1165                               data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1166                         break;
1167         }
1168
1169         if (i >= wpa_s->sme.sa_query_count) {
1170                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1171                         "transaction identifier found");
1172                 return;
1173         }
1174
1175         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1176                 "from " MACSTR, MAC2STR(sa));
1177         sme_stop_sa_query(wpa_s);
1178 }
1179
1180 #endif /* CONFIG_IEEE80211W */