wpa_supplicant/sme.c

   1 /*
   2  * wpa_supplicant - SME
   3  * Copyright (c) 2009-2012, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "includes.h"
  10
  11 #include "common.h"
  12 #include "utils/eloop.h"
  13 #include "common/ieee802_11_defs.h"
  14 #include "common/ieee802_11_common.h"
  15 #include "eapol_supp/eapol_supp_sm.h"
  16 #include "common/wpa_common.h"
  17 #include "common/sae.h"
  18 #include "rsn_supp/wpa.h"
  19 #include "rsn_supp/pmksa_cache.h"
  20 #include "config.h"
  21 #include "wpa_supplicant_i.h"
  22 #include "driver_i.h"
  23 #include "wpas_glue.h"
  24 #include "wps_supplicant.h"
  25 #include "p2p_supplicant.h"
  26 #include "notify.h"
  27 #include "bss.h"
  28 #include "scan.h"
  29 #include "sme.h"
  30 #include "hs20_supplicant.h"
  31
  32 #define SME_AUTH_TIMEOUT 5
  33 #define SME_ASSOC_TIMEOUT 5
  34
  35 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx);
  36 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx);
  37 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx);
  38 #ifdef CONFIG_IEEE80211W
  39 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s);
  40 #endif /* CONFIG_IEEE80211W */
  41
  42
  43 #ifdef CONFIG_SAE
  44
  45 static struct wpabuf * sme_auth_build_sae_commit(struct wpa_supplicant *wpa_s,
  46                                                  struct wpa_ssid *ssid,
  47                                                  const u8 *bssid)
  48 {
  49         struct wpabuf *buf;
  50
  51         if (ssid->passphrase == NULL) {
  52                 wpa_printf(MSG_DEBUG, "SAE: No password available");
  53                 return NULL;
  54         }
  55
  56         if (sae_prepare_commit(wpa_s->own_addr, bssid,
  57                                (u8 *) ssid->passphrase,
  58                                os_strlen(ssid->passphrase),
  59                                &wpa_s->sme.sae) < 0) {
  60                 wpa_printf(MSG_DEBUG, "SAE: Could not pick PWE");
  61                 return NULL;
  62         }
  63
  64         buf = wpabuf_alloc(4 + SAE_COMMIT_MAX_LEN);
  65         if (buf == NULL)
  66                 return NULL;
  67
  68         wpabuf_put_le16(buf, 1); /* Transaction seq# */
  69         wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
  70         sae_write_commit(&wpa_s->sme.sae, buf);
  71
  72         return buf;
  73 }
  74
  75
  76 static struct wpabuf * sme_auth_build_sae_confirm(struct wpa_supplicant *wpa_s)
  77 {
  78         struct wpabuf *buf;
  79
  80         buf = wpabuf_alloc(4 + 2);
  81         if (buf == NULL)
  82                 return NULL;
  83
  84         wpabuf_put_le16(buf, 2); /* Transaction seq# */
  85         wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
  86         wpabuf_put_le16(buf, wpa_s->sme.sae.send_confirm);
  87         wpa_s->sme.sae.send_confirm++;
  88         /* TODO: Confirm */
  89
  90         return buf;
  91 }
  92
  93 #endif /* CONFIG_SAE */
  94
  95
  96 static void sme_send_authentication(struct wpa_supplicant *wpa_s,
  97                                     struct wpa_bss *bss, struct wpa_ssid *ssid,
  98                                     int start)
  99 {
 100         struct wpa_driver_auth_params params;
 101         struct wpa_ssid *old_ssid;
 102 #ifdef CONFIG_IEEE80211R
 103         const u8 *ie;
 104 #endif /* CONFIG_IEEE80211R */
 105 #ifdef CONFIG_IEEE80211R
 106         const u8 *md = NULL;
 107 #endif /* CONFIG_IEEE80211R */
 108         int i, bssid_changed;
 109         struct wpabuf *resp = NULL;
 110         u8 ext_capab[10];
 111         int ext_capab_len;
 112
 113         if (bss == NULL) {
 114                 wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for "
 115                         "the network");
 116                 return;
 117         }
 118
 119         wpa_s->current_bss = bss;
 120
 121         os_memset(&params, 0, sizeof(params));
 122         wpa_s->reassociate = 0;
 123
 124         params.freq = bss->freq;
 125         params.bssid = bss->bssid;
 126         params.ssid = bss->ssid;
 127         params.ssid_len = bss->ssid_len;
 128         params.p2p = ssid->p2p_group;
 129
 130         if (wpa_s->sme.ssid_len != params.ssid_len ||
 131             os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
 132                 wpa_s->sme.prev_bssid_set = 0;
 133
 134         wpa_s->sme.freq = params.freq;
 135         os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
 136         wpa_s->sme.ssid_len = params.ssid_len;
 137
 138         params.auth_alg = WPA_AUTH_ALG_OPEN;
 139 #ifdef IEEE8021X_EAPOL
 140         if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
 141                 if (ssid->leap) {
 142                         if (ssid->non_leap == 0)
 143                                 params.auth_alg = WPA_AUTH_ALG_LEAP;
 144                         else
 145                                 params.auth_alg |= WPA_AUTH_ALG_LEAP;
 146                 }
 147         }
 148 #endif /* IEEE8021X_EAPOL */
 149         wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
 150                 params.auth_alg);
 151         if (ssid->auth_alg) {
 152                 params.auth_alg = ssid->auth_alg;
 153                 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
 154                         "0x%x", params.auth_alg);
 155         }
 156 #ifdef CONFIG_SAE
 157         if (wpa_key_mgmt_sae(ssid->key_mgmt)) {
 158                 const u8 *rsn;
 159                 struct wpa_ie_data ied;
 160
 161                 rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 162                 if (rsn &&
 163                     wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0) {
 164                         if (wpa_key_mgmt_sae(ied.key_mgmt)) {
 165                                 wpa_dbg(wpa_s, MSG_DEBUG, "Using SAE auth_alg");
 166                                 params.auth_alg = WPA_AUTH_ALG_SAE;
 167                         }
 168                 }
 169         }
 170 #endif /* CONFIG_SAE */
 171
 172         for (i = 0; i < NUM_WEP_KEYS; i++) {
 173                 if (ssid->wep_key_len[i])
 174                         params.wep_key[i] = ssid->wep_key[i];
 175                 params.wep_key_len[i] = ssid->wep_key_len[i];
 176         }
 177         params.wep_tx_keyidx = ssid->wep_tx_keyidx;
 178
 179         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 180         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 181         os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
 182         if (bssid_changed)
 183                 wpas_notify_bssid_changed(wpa_s);
 184
 185         if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
 186              wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
 187             wpa_key_mgmt_wpa(ssid->key_mgmt)) {
 188                 int try_opportunistic;
 189                 try_opportunistic = (ssid->proactive_key_caching < 0 ?
 190                                      wpa_s->conf->okc :
 191                                      ssid->proactive_key_caching) &&
 192                         (ssid->proto & WPA_PROTO_RSN);
 193                 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
 194                                             wpa_s->current_ssid,
 195                                             try_opportunistic) == 0)
 196                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
 197                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 198                 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
 199                                               wpa_s->sme.assoc_req_ie,
 200                                               &wpa_s->sme.assoc_req_ie_len)) {
 201                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 202                                 "key management and encryption suites");
 203                         return;
 204                 }
 205         } else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
 206                    wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) {
 207                 /*
 208                  * Both WPA and non-WPA IEEE 802.1X enabled in configuration -
 209                  * use non-WPA since the scan results did not indicate that the
 210                  * AP is using WPA or WPA2.
 211                  */
 212                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 213                 wpa_s->sme.assoc_req_ie_len = 0;
 214         } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
 215                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 216                 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
 217                                               wpa_s->sme.assoc_req_ie,
 218                                               &wpa_s->sme.assoc_req_ie_len)) {
 219                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 220                                 "key management and encryption suites (no "
 221                                 "scan results)");
 222                         return;
 223                 }
 224 #ifdef CONFIG_WPS
 225         } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 226                 struct wpabuf *wps_ie;
 227                 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
 228                 if (wps_ie && wpabuf_len(wps_ie) <=
 229                     sizeof(wpa_s->sme.assoc_req_ie)) {
 230                         wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
 231                         os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
 232                                   wpa_s->sme.assoc_req_ie_len);
 233                 } else
 234                         wpa_s->sme.assoc_req_ie_len = 0;
 235                 wpabuf_free(wps_ie);
 236                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 237 #endif /* CONFIG_WPS */
 238         } else {
 239                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 240                 wpa_s->sme.assoc_req_ie_len = 0;
 241         }
 242
 243 #ifdef CONFIG_IEEE80211R
 244         ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
 245         if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
 246                 md = ie + 2;
 247         wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
 248         if (md) {
 249                 /* Prepare for the next transition */
 250                 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
 251         }
 252
 253         if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) {
 254                 if (wpa_s->sme.assoc_req_ie_len + 5 <
 255                     sizeof(wpa_s->sme.assoc_req_ie)) {
 256                         struct rsn_mdie *mdie;
 257                         u8 *pos = wpa_s->sme.assoc_req_ie +
 258                                 wpa_s->sme.assoc_req_ie_len;
 259                         *pos++ = WLAN_EID_MOBILITY_DOMAIN;
 260                         *pos++ = sizeof(*mdie);
 261                         mdie = (struct rsn_mdie *) pos;
 262                         os_memcpy(mdie->mobility_domain, md,
 263                                   MOBILITY_DOMAIN_ID_LEN);
 264                         mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
 265                         wpa_s->sme.assoc_req_ie_len += 5;
 266                 }
 267
 268                 if (wpa_s->sme.ft_used &&
 269                     os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
 270                     wpa_sm_has_ptk(wpa_s->wpa)) {
 271                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT "
 272                                 "over-the-air");
 273                         params.auth_alg = WPA_AUTH_ALG_FT;
 274                         params.ie = wpa_s->sme.ft_ies;
 275                         params.ie_len = wpa_s->sme.ft_ies_len;
 276                 }
 277         }
 278 #endif /* CONFIG_IEEE80211R */
 279
 280 #ifdef CONFIG_IEEE80211W
 281         wpa_s->sme.mfp = ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
 282                 wpa_s->conf->pmf : ssid->ieee80211w;
 283         if (wpa_s->sme.mfp != NO_MGMT_FRAME_PROTECTION) {
 284                 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 285                 struct wpa_ie_data _ie;
 286                 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
 287                     _ie.capabilities &
 288                     (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
 289                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
 290                                 "MFP: require MFP");
 291                         wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
 292                 }
 293         }
 294 #endif /* CONFIG_IEEE80211W */
 295
 296 #ifdef CONFIG_P2P
 297         if (wpa_s->global->p2p) {
 298                 u8 *pos;
 299                 size_t len;
 300                 int res;
 301                 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
 302                 len = sizeof(wpa_s->sme.assoc_req_ie) -
 303                         wpa_s->sme.assoc_req_ie_len;
 304                 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
 305                                             ssid->p2p_group);
 306                 if (res >= 0)
 307                         wpa_s->sme.assoc_req_ie_len += res;
 308         }
 309 #endif /* CONFIG_P2P */
 310
 311 #ifdef CONFIG_HS20
 312         if (wpa_s->conf->hs20) {
 313                 struct wpabuf *hs20;
 314                 hs20 = wpabuf_alloc(20);
 315                 if (hs20) {
 316                         wpas_hs20_add_indication(hs20);
 317                         os_memcpy(wpa_s->sme.assoc_req_ie +
 318                                   wpa_s->sme.assoc_req_ie_len,
 319                                   wpabuf_head(hs20), wpabuf_len(hs20));
 320                         wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
 321                         wpabuf_free(hs20);
 322                 }
 323         }
 324 #endif /* CONFIG_HS20 */
 325
 326         ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab);
 327         if (ext_capab_len > 0) {
 328                 u8 *pos = wpa_s->sme.assoc_req_ie;
 329                 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
 330                         pos += 2 + pos[1];
 331                 os_memmove(pos + ext_capab_len, pos,
 332                            wpa_s->sme.assoc_req_ie_len -
 333                            (pos - wpa_s->sme.assoc_req_ie));
 334                 wpa_s->sme.assoc_req_ie_len += ext_capab_len;
 335                 os_memcpy(pos, ext_capab, ext_capab_len);
 336         }
 337
 338 #ifdef CONFIG_SAE
 339         if (params.auth_alg == WPA_AUTH_ALG_SAE) {
 340                 if (start)
 341                         resp = sme_auth_build_sae_commit(wpa_s, ssid,
 342                                                          bss->bssid);
 343                 else
 344                         resp = sme_auth_build_sae_confirm(wpa_s);
 345                 if (resp == NULL)
 346                         return;
 347                 params.sae_data = wpabuf_head(resp);
 348                 params.sae_data_len = wpabuf_len(resp);
 349                 wpa_s->sme.sae.state = start ? SAE_COMMIT : SAE_CONFIRM;
 350         }
 351 #endif /* CONFIG_SAE */
 352
 353         wpa_supplicant_cancel_sched_scan(wpa_s);
 354         wpa_supplicant_cancel_scan(wpa_s);
 355
 356         wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
 357                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 358                 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
 359
 360         wpa_clear_keys(wpa_s, bss->bssid);
 361         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 362         old_ssid = wpa_s->current_ssid;
 363         wpa_s->current_ssid = ssid;
 364         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
 365         wpa_supplicant_initiate_eapol(wpa_s);
 366         if (old_ssid != wpa_s->current_ssid)
 367                 wpas_notify_network_changed(wpa_s);
 368
 369         wpa_s->sme.auth_alg = params.auth_alg;
 370         if (wpa_drv_authenticate(wpa_s, &params) < 0) {
 371                 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
 372                         "driver failed");
 373                 wpas_connection_failed(wpa_s, bss->bssid);
 374                 wpa_supplicant_mark_disassoc(wpa_s);
 375                 wpabuf_free(resp);
 376                 return;
 377         }
 378
 379         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 380                                NULL);
 381
 382         /*
 383          * Association will be started based on the authentication event from
 384          * the driver.
 385          */
 386
 387         wpabuf_free(resp);
 388 }
 389
 390
 391 void sme_authenticate(struct wpa_supplicant *wpa_s,
 392                       struct wpa_bss *bss, struct wpa_ssid *ssid)
 393 {
 394 #ifdef CONFIG_SAE
 395         wpa_s->sme.sae.state = SAE_INIT;
 396         wpa_s->sme.sae.send_confirm = 0;
 397 #endif /* CONFIG_SAE */
 398         sme_send_authentication(wpa_s, bss, ssid, 1);
 399 }
 400
 401
 402 #ifdef CONFIG_SAE
 403
 404 static int sme_sae_process_commit(struct wpa_supplicant *wpa_s, const u8 *data,
 405                                   size_t len)
 406 {
 407         /* Check Finite Cyclic Group */
 408         if (len < 2)
 409                 return -1;
 410         if (WPA_GET_LE16(data) != 19) {
 411                 wpa_printf(MSG_DEBUG, "SAE: Unsupported Finite Cyclic Group %u",
 412                            WPA_GET_LE16(data));
 413                 return -1;
 414         }
 415
 416         /* TODO */
 417
 418         return 0;
 419 }
 420
 421
 422 static int sme_sae_process_confirm(struct wpa_supplicant *wpa_s, const u8 *data,
 423                                    size_t len)
 424 {
 425         u16 rc;
 426
 427         if (len < 2)
 428                 return -1;
 429         rc = WPA_GET_LE16(data);
 430         wpa_printf(MSG_DEBUG, "SAE: peer-send-confirm %u", rc);
 431
 432         /* TODO */
 433         return 0;
 434 }
 435
 436
 437 static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
 438                         u16 status_code, const u8 *data, size_t len)
 439 {
 440         wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
 441                 "status code %u", auth_transaction, status_code);
 442         wpa_hexdump(MSG_DEBUG, "SME: SAE fields", data, len);
 443
 444         if (status_code != WLAN_STATUS_SUCCESS)
 445                 return -1;
 446
 447         if (auth_transaction == 1) {
 448                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
 449                 if (wpa_s->current_bss == NULL ||
 450                     wpa_s->current_ssid == NULL)
 451                         return -1;
 452                 if (wpa_s->sme.sae.state != SAE_COMMIT)
 453                         return -1;
 454                 if (sme_sae_process_commit(wpa_s, data, len) < 0)
 455                         return -1;
 456                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 457                                         wpa_s->current_ssid, 0);
 458                 return 0;
 459         } else if (auth_transaction == 2) {
 460                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
 461                 if (wpa_s->sme.sae.state != SAE_CONFIRM)
 462                         return -1;
 463                 if (sme_sae_process_confirm(wpa_s, data, len) < 0)
 464                         return -1;
 465                 return 1;
 466         }
 467
 468         return -1;
 469 }
 470 #endif /* CONFIG_SAE */
 471
 472
 473 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
 474 {
 475         struct wpa_ssid *ssid = wpa_s->current_ssid;
 476
 477         if (ssid == NULL) {
 478                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 479                         "when network is not selected");
 480                 return;
 481         }
 482
 483         if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
 484                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 485                         "when not in authenticating state");
 486                 return;
 487         }
 488
 489         if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
 490                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
 491                         "unexpected peer " MACSTR,
 492                         MAC2STR(data->auth.peer));
 493                 return;
 494         }
 495
 496         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
 497                 " auth_type=%d auth_transaction=%d status_code=%d",
 498                 MAC2STR(data->auth.peer), data->auth.auth_type,
 499                 data->auth.auth_transaction, data->auth.status_code);
 500         wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
 501                     data->auth.ies, data->auth.ies_len);
 502
 503         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 504
 505 #ifdef CONFIG_SAE
 506         if (data->auth.auth_type == WLAN_AUTH_SAE) {
 507                 int res;
 508                 res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
 509                                    data->auth.status_code, data->auth.ies,
 510                                    data->auth.ies_len);
 511                 if (res < 0) {
 512                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 513                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 514
 515                 }
 516                 if (res != 1)
 517                         return;
 518         }
 519 #endif /* CONFIG_SAE */
 520
 521         if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
 522                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
 523                         "code %d)", data->auth.status_code);
 524
 525                 if (data->auth.status_code !=
 526                     WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
 527                     wpa_s->sme.auth_alg == data->auth.auth_type ||
 528                     wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
 529                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 530                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 531                         return;
 532                 }
 533
 534                 switch (data->auth.auth_type) {
 535                 case WLAN_AUTH_OPEN:
 536                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 537
 538                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
 539                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 540                                                  wpa_s->current_ssid);
 541                         return;
 542
 543                 case WLAN_AUTH_SHARED_KEY:
 544                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
 545
 546                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
 547                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 548                                                  wpa_s->current_ssid);
 549                         return;
 550
 551                 default:
 552                         return;
 553                 }
 554         }
 555
 556 #ifdef CONFIG_IEEE80211R
 557         if (data->auth.auth_type == WLAN_AUTH_FT) {
 558                 union wpa_event_data edata;
 559                 os_memset(&edata, 0, sizeof(edata));
 560                 edata.ft_ies.ies = data->auth.ies;
 561                 edata.ft_ies.ies_len = data->auth.ies_len;
 562                 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
 563                 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
 564         }
 565 #endif /* CONFIG_IEEE80211R */
 566
 567         sme_associate(wpa_s, ssid->mode, data->auth.peer,
 568                       data->auth.auth_type);
 569 }
 570
 571
 572 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
 573                    const u8 *bssid, u16 auth_type)
 574 {
 575         struct wpa_driver_associate_params params;
 576         struct ieee802_11_elems elems;
 577 #ifdef CONFIG_HT_OVERRIDES
 578         struct ieee80211_ht_capabilities htcaps;
 579         struct ieee80211_ht_capabilities htcaps_mask;
 580 #endif /* CONFIG_HT_OVERRIDES */
 581
 582         os_memset(&params, 0, sizeof(params));
 583         params.bssid = bssid;
 584         params.ssid = wpa_s->sme.ssid;
 585         params.ssid_len = wpa_s->sme.ssid_len;
 586         params.freq = wpa_s->sme.freq;
 587         params.bg_scan_period = wpa_s->current_ssid ?
 588                 wpa_s->current_ssid->bg_scan_period : -1;
 589         params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
 590                 wpa_s->sme.assoc_req_ie : NULL;
 591         params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
 592         params.pairwise_suite = cipher_suite2driver(wpa_s->pairwise_cipher);
 593         params.group_suite = cipher_suite2driver(wpa_s->group_cipher);
 594 #ifdef CONFIG_HT_OVERRIDES
 595         os_memset(&htcaps, 0, sizeof(htcaps));
 596         os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
 597         params.htcaps = (u8 *) &htcaps;
 598         params.htcaps_mask = (u8 *) &htcaps_mask;
 599         wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, &params);
 600 #endif /* CONFIG_HT_OVERRIDES */
 601 #ifdef CONFIG_IEEE80211R
 602         if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
 603                 params.wpa_ie = wpa_s->sme.ft_ies;
 604                 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
 605         }
 606 #endif /* CONFIG_IEEE80211R */
 607         params.mode = mode;
 608         params.mgmt_frame_protection = wpa_s->sme.mfp;
 609         if (wpa_s->sme.prev_bssid_set)
 610                 params.prev_bssid = wpa_s->sme.prev_bssid;
 611
 612         wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
 613                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 614                 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
 615                 params.freq);
 616
 617         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
 618
 619         if (params.wpa_ie == NULL ||
 620             ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
 621             < 0) {
 622                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
 623                 os_memset(&elems, 0, sizeof(elems));
 624         }
 625         if (elems.rsn_ie) {
 626                 params.wpa_proto = WPA_PROTO_RSN;
 627                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
 628                                         elems.rsn_ie_len + 2);
 629         } else if (elems.wpa_ie) {
 630                 params.wpa_proto = WPA_PROTO_WPA;
 631                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
 632                                         elems.wpa_ie_len + 2);
 633         } else
 634                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 635         if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
 636                 params.p2p = 1;
 637
 638         if (wpa_s->parent->set_sta_uapsd)
 639                 params.uapsd = wpa_s->parent->sta_uapsd;
 640         else
 641                 params.uapsd = -1;
 642
 643         if (wpa_drv_associate(wpa_s, &params) < 0) {
 644                 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
 645                         "driver failed");
 646                 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 647                 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 648                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 649                 return;
 650         }
 651
 652         eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
 653                                NULL);
 654 }
 655
 656
 657 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
 658                       const u8 *ies, size_t ies_len)
 659 {
 660         if (md == NULL || ies == NULL) {
 661                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
 662                 os_free(wpa_s->sme.ft_ies);
 663                 wpa_s->sme.ft_ies = NULL;
 664                 wpa_s->sme.ft_ies_len = 0;
 665                 wpa_s->sme.ft_used = 0;
 666                 return 0;
 667         }
 668
 669         os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
 670         wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
 671         os_free(wpa_s->sme.ft_ies);
 672         wpa_s->sme.ft_ies = os_malloc(ies_len);
 673         if (wpa_s->sme.ft_ies == NULL)
 674                 return -1;
 675         os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
 676         wpa_s->sme.ft_ies_len = ies_len;
 677         return 0;
 678 }
 679
 680
 681 static void sme_deauth(struct wpa_supplicant *wpa_s)
 682 {
 683         int bssid_changed;
 684
 685         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 686
 687         if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
 688                                    WLAN_REASON_DEAUTH_LEAVING) < 0) {
 689                 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
 690                         "failed");
 691         }
 692         wpa_s->sme.prev_bssid_set = 0;
 693
 694         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 695         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 696         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 697         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 698         if (bssid_changed)
 699                 wpas_notify_bssid_changed(wpa_s);
 700 }
 701
 702
 703 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
 704                             union wpa_event_data *data)
 705 {
 706         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
 707                 "status code %d", MAC2STR(wpa_s->pending_bssid),
 708                 data->assoc_reject.status_code);
 709
 710         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 711
 712         /*
 713          * For now, unconditionally terminate the previous authentication. In
 714          * theory, this should not be needed, but mac80211 gets quite confused
 715          * if the authentication is left pending.. Some roaming cases might
 716          * benefit from using the previous authentication, so this could be
 717          * optimized in the future.
 718          */
 719         sme_deauth(wpa_s);
 720 }
 721
 722
 723 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
 724                               union wpa_event_data *data)
 725 {
 726         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
 727         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 728         wpa_supplicant_mark_disassoc(wpa_s);
 729 }
 730
 731
 732 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
 733                                union wpa_event_data *data)
 734 {
 735         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
 736         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 737         wpa_supplicant_mark_disassoc(wpa_s);
 738 }
 739
 740
 741 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
 742                         union wpa_event_data *data)
 743 {
 744         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
 745         if (wpa_s->sme.prev_bssid_set) {
 746                 /*
 747                  * cfg80211/mac80211 can get into somewhat confused state if
 748                  * the AP only disassociates us and leaves us in authenticated
 749                  * state. For now, force the state to be cleared to avoid
 750                  * confusing errors if we try to associate with the AP again.
 751                  */
 752                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
 753                         "driver state");
 754                 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
 755                                        WLAN_REASON_DEAUTH_LEAVING);
 756         }
 757 }
 758
 759
 760 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
 761 {
 762         struct wpa_supplicant *wpa_s = eloop_ctx;
 763         if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
 764                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
 765                 sme_deauth(wpa_s);
 766         }
 767 }
 768
 769
 770 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
 771 {
 772         struct wpa_supplicant *wpa_s = eloop_ctx;
 773         if (wpa_s->wpa_state == WPA_ASSOCIATING) {
 774                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
 775                 sme_deauth(wpa_s);
 776         }
 777 }
 778
 779
 780 void sme_state_changed(struct wpa_supplicant *wpa_s)
 781 {
 782         /* Make sure timers are cleaned up appropriately. */
 783         if (wpa_s->wpa_state != WPA_ASSOCIATING)
 784                 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 785         if (wpa_s->wpa_state != WPA_AUTHENTICATING)
 786                 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 787 }
 788
 789
 790 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
 791                                        const u8 *prev_pending_bssid)
 792 {
 793         /*
 794          * mac80211-workaround to force deauth on failed auth cmd,
 795          * requires us to remain in authenticating state to allow the
 796          * second authentication attempt to be continued properly.
 797          */
 798         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
 799                 "to proceed after disconnection event");
 800         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 801         os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
 802
 803         /*
 804          * Re-arm authentication timer in case auth fails for whatever reason.
 805          */
 806         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 807         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 808                                NULL);
 809 }
 810
 811
 812 void sme_deinit(struct wpa_supplicant *wpa_s)
 813 {
 814         os_free(wpa_s->sme.ft_ies);
 815         wpa_s->sme.ft_ies = NULL;
 816         wpa_s->sme.ft_ies_len = 0;
 817 #ifdef CONFIG_IEEE80211W
 818         sme_stop_sa_query(wpa_s);
 819 #endif /* CONFIG_IEEE80211W */
 820
 821         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 822         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 823         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
 824 }
 825
 826
 827 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
 828                                    const u8 *chan_list, u8 num_channels,
 829                                    u8 num_intol)
 830 {
 831         struct ieee80211_2040_bss_coex_ie *bc_ie;
 832         struct ieee80211_2040_intol_chan_report *ic_report;
 833         struct wpabuf *buf;
 834
 835         wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR,
 836                    MAC2STR(wpa_s->bssid));
 837
 838         buf = wpabuf_alloc(2 + /* action.category + action_code */
 839                            sizeof(struct ieee80211_2040_bss_coex_ie) +
 840                            sizeof(struct ieee80211_2040_intol_chan_report) +
 841                            num_channels);
 842         if (buf == NULL)
 843                 return;
 844
 845         wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
 846         wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
 847
 848         bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
 849         bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
 850         bc_ie->length = 1;
 851         if (num_intol)
 852                 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
 853
 854         if (num_channels > 0) {
 855                 ic_report = wpabuf_put(buf, sizeof(*ic_report));
 856                 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
 857                 ic_report->length = num_channels + 1;
 858                 ic_report->op_class = 0;
 859                 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
 860                           num_channels);
 861         }
 862
 863         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
 864                                 wpa_s->own_addr, wpa_s->bssid,
 865                                 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
 866                 wpa_msg(wpa_s, MSG_INFO,
 867                         "SME: Failed to send 20/40 BSS Coexistence frame");
 868         }
 869
 870         wpabuf_free(buf);
 871 }
 872
 873
 874 /**
 875  * enum wpas_band - Frequency band
 876  * @WPAS_BAND_2GHZ: 2.4 GHz ISM band
 877  * @WPAS_BAND_5GHZ: around 5 GHz band (4.9 - 5.7 GHz)
 878  */
 879 enum wpas_band {
 880         WPAS_BAND_2GHZ,
 881         WPAS_BAND_5GHZ,
 882         WPAS_BAND_INVALID
 883 };
 884
 885 /**
 886  * freq_to_channel - Convert frequency into channel info
 887  * @channel: Buffer for returning channel number
 888  * Returns: Band (2 or 5 GHz)
 889  */
 890 static enum wpas_band freq_to_channel(int freq, u8 *channel)
 891 {
 892         enum wpas_band band = (freq <= 2484) ? WPAS_BAND_2GHZ : WPAS_BAND_5GHZ;
 893         u8 chan = 0;
 894
 895         if (freq >= 2412 && freq <= 2472)
 896                 chan = (freq - 2407) / 5;
 897         else if (freq == 2484)
 898                 chan = 14;
 899         else if (freq >= 5180 && freq <= 5805)
 900                 chan = (freq - 5000) / 5;
 901
 902         *channel = chan;
 903         return band;
 904 }
 905
 906
 907 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
 908 {
 909         struct wpa_bss *bss;
 910         const u8 *ie;
 911         u16 ht_cap;
 912         u8 chan_list[P2P_MAX_CHANNELS], channel;
 913         u8 num_channels = 0, num_intol = 0, i;
 914
 915         if (!wpa_s->sme.sched_obss_scan)
 916                 return 0;
 917
 918         wpa_s->sme.sched_obss_scan = 0;
 919         if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
 920                 return 1;
 921
 922         /*
 923          * Check whether AP uses regulatory triplet or channel triplet in
 924          * country info. Right now the operating class of the BSS channel
 925          * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
 926          * based on the assumption that operating class triplet is not used in
 927          * beacon frame. If the First Channel Number/Operating Extension
 928          * Identifier octet has a positive integer value of 201 or greater,
 929          * then its operating class triplet.
 930          *
 931          * TODO: If Supported Operating Classes element is present in beacon
 932          * frame, have to lookup operating class in Annex E and fill them in
 933          * 2040 coex frame.
 934          */
 935         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
 936         if (ie && (ie[1] >= 6) && (ie[5] >= 201))
 937                 return 1;
 938
 939         os_memset(chan_list, 0, sizeof(chan_list));
 940
 941         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
 942                 /* Skip other band bss */
 943                 if (freq_to_channel(bss->freq, &channel) != WPAS_BAND_2GHZ)
 944                         continue;
 945
 946                 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
 947                 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
 948
 949                 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
 950                         /* Check whether the channel is already considered */
 951                         for (i = 0; i < num_channels; i++) {
 952                                 if (channel == chan_list[i])
 953                                         break;
 954                         }
 955                         if (i != num_channels)
 956                                 continue;
 957
 958                         if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
 959                                 num_intol++;
 960
 961                         chan_list[num_channels++] = channel;
 962                 }
 963         }
 964
 965         sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
 966         return 1;
 967 }
 968
 969
 970 static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
 971                                           u16 num_modes,
 972                                           enum hostapd_hw_mode mode)
 973 {
 974         u16 i;
 975
 976         for (i = 0; i < num_modes; i++) {
 977                 if (modes[i].mode == mode)
 978                         return &modes[i];
 979         }
 980
 981         return NULL;
 982 }
 983
 984
 985 static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s,
 986                                         enum hostapd_hw_mode band,
 987                                         struct wpa_driver_scan_params *params)
 988 {
 989         /* Include only supported channels for the specified band */
 990         struct hostapd_hw_modes *mode;
 991         int count, i;
 992
 993         mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band);
 994         if (mode == NULL) {
 995                 /* No channels supported in this band - use empty list */
 996                 params->freqs = os_zalloc(sizeof(int));
 997                 return;
 998         }
 999
1000         params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
1001         if (params->freqs == NULL)
1002                 return;
1003         for (count = 0, i = 0; i < mode->num_channels; i++) {
1004                 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
1005                         continue;
1006                 params->freqs[count++] = mode->channels[i].freq;
1007         }
1008 }
1009
1010
1011 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1012 {
1013         struct wpa_supplicant *wpa_s = eloop_ctx;
1014         struct wpa_driver_scan_params params;
1015
1016         if (!wpa_s->current_bss) {
1017                 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
1018                 return;
1019         }
1020
1021         os_memset(&params, 0, sizeof(params));
1022         wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G, &params);
1023         wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
1024
1025         if (wpa_supplicant_trigger_scan(wpa_s, &params))
1026                 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
1027         else
1028                 wpa_s->sme.sched_obss_scan = 1;
1029         os_free(params.freqs);
1030
1031         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1032                                sme_obss_scan_timeout, wpa_s, NULL);
1033 }
1034
1035
1036 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
1037 {
1038         const u8 *ie;
1039         struct wpa_bss *bss = wpa_s->current_bss;
1040         struct wpa_ssid *ssid = wpa_s->current_ssid;
1041         struct hostapd_hw_modes *hw_mode = NULL;
1042         int i;
1043
1044         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1045         wpa_s->sme.sched_obss_scan = 0;
1046         if (!enable)
1047                 return;
1048
1049         /*
1050          * Schedule OBSS scan if driver is using station SME in wpa_supplicant
1051          * or it expects OBSS scan to be performed by wpa_supplicant.
1052          */
1053         if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
1054               (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
1055             ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
1056                 return;
1057
1058         if (!wpa_s->hw.modes)
1059                 return;
1060
1061         /* only HT caps in 11g mode are relevant */
1062         for (i = 0; i < wpa_s->hw.num_modes; i++) {
1063                 hw_mode = &wpa_s->hw.modes[i];
1064                 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
1065                         break;
1066         }
1067
1068         /* Driver does not support HT40 for 11g or doesn't have 11g. */
1069         if (i == wpa_s->hw.num_modes || !hw_mode ||
1070             !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1071                 return;
1072
1073         if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
1074                 return; /* Not associated on 2.4 GHz band */
1075
1076         /* Check whether AP supports HT40 */
1077         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
1078         if (!ie || ie[1] < 2 ||
1079             !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1080                 return; /* AP does not support HT40 */
1081
1082         ie = wpa_bss_get_ie(wpa_s->current_bss,
1083                             WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
1084         if (!ie || ie[1] < 14)
1085                 return; /* AP does not request OBSS scans */
1086
1087         wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
1088         if (wpa_s->sme.obss_scan_int < 10) {
1089                 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
1090                            "replaced with the minimum 10 sec",
1091                            wpa_s->sme.obss_scan_int);
1092                 wpa_s->sme.obss_scan_int = 10;
1093         }
1094         wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
1095                    wpa_s->sme.obss_scan_int);
1096         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1097                                sme_obss_scan_timeout, wpa_s, NULL);
1098 }
1099
1100
1101 #ifdef CONFIG_IEEE80211W
1102
1103 static const unsigned int sa_query_max_timeout = 1000;
1104 static const unsigned int sa_query_retry_timeout = 201;
1105
1106 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
1107 {
1108         u32 tu;
1109         struct os_time now, passed;
1110         os_get_time(&now);
1111         os_time_sub(&now, &wpa_s->sme.sa_query_start, &passed);
1112         tu = (passed.sec * 1000000 + passed.usec) / 1024;
1113         if (sa_query_max_timeout < tu) {
1114                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
1115                 sme_stop_sa_query(wpa_s);
1116                 wpa_supplicant_deauthenticate(
1117                         wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
1118                 return 1;
1119         }
1120
1121         return 0;
1122 }
1123
1124
1125 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
1126                                   const u8 *trans_id)
1127 {
1128         u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
1129         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
1130                 MACSTR, MAC2STR(wpa_s->bssid));
1131         wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
1132                     trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1133         req[0] = WLAN_ACTION_SA_QUERY;
1134         req[1] = WLAN_SA_QUERY_REQUEST;
1135         os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1136         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1137                                 wpa_s->own_addr, wpa_s->bssid,
1138                                 req, sizeof(req), 0) < 0)
1139                 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
1140                         "Request");
1141 }
1142
1143
1144 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
1145 {
1146         struct wpa_supplicant *wpa_s = eloop_ctx;
1147         unsigned int timeout, sec, usec;
1148         u8 *trans_id, *nbuf;
1149
1150         if (wpa_s->sme.sa_query_count > 0 &&
1151             sme_check_sa_query_timeout(wpa_s))
1152                 return;
1153
1154         nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
1155                                 wpa_s->sme.sa_query_count + 1,
1156                                 WLAN_SA_QUERY_TR_ID_LEN);
1157         if (nbuf == NULL)
1158                 return;
1159         if (wpa_s->sme.sa_query_count == 0) {
1160                 /* Starting a new SA Query procedure */
1161                 os_get_time(&wpa_s->sme.sa_query_start);
1162         }
1163         trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
1164         wpa_s->sme.sa_query_trans_id = nbuf;
1165         wpa_s->sme.sa_query_count++;
1166
1167         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1168
1169         timeout = sa_query_retry_timeout;
1170         sec = ((timeout / 1000) * 1024) / 1000;
1171         usec = (timeout % 1000) * 1024;
1172         eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
1173
1174         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
1175                 wpa_s->sme.sa_query_count);
1176
1177         sme_send_sa_query_req(wpa_s, trans_id);
1178 }
1179
1180
1181 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
1182 {
1183         sme_sa_query_timer(wpa_s, NULL);
1184 }
1185
1186
1187 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
1188 {
1189         eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
1190         os_free(wpa_s->sme.sa_query_trans_id);
1191         wpa_s->sme.sa_query_trans_id = NULL;
1192         wpa_s->sme.sa_query_count = 0;
1193 }
1194
1195
1196 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1197                                  const u8 *da, u16 reason_code)
1198 {
1199         struct wpa_ssid *ssid;
1200
1201         if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME))
1202                 return;
1203         if (wpa_s->wpa_state != WPA_COMPLETED)
1204                 return;
1205         ssid = wpa_s->current_ssid;
1206         if (ssid == NULL ||
1207             (ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
1208              wpa_s->conf->pmf : ssid->ieee80211w) == NO_MGMT_FRAME_PROTECTION)
1209                 return;
1210         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1211                 return;
1212         if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1213             reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1214                 return;
1215         if (wpa_s->sme.sa_query_count > 0)
1216                 return;
1217
1218         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1219                 "possible AP/STA state mismatch - trigger SA Query");
1220         sme_start_sa_query(wpa_s);
1221 }
1222
1223
1224 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1225                      const u8 *data, size_t len)
1226 {
1227         int i;
1228
1229         if (wpa_s->sme.sa_query_trans_id == NULL ||
1230             len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1231             data[0] != WLAN_SA_QUERY_RESPONSE)
1232                 return;
1233         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1234                 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1235
1236         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1237                 return;
1238
1239         for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1240                 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1241                               i * WLAN_SA_QUERY_TR_ID_LEN,
1242                               data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1243                         break;
1244         }
1245
1246         if (i >= wpa_s->sme.sa_query_count) {
1247                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1248                         "transaction identifier found");
1249                 return;
1250         }
1251
1252         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1253                 "from " MACSTR, MAC2STR(sa));
1254         sme_stop_sa_query(wpa_s);
1255 }
1256
1257 #endif /* CONFIG_IEEE80211W */