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 int index_within_array(const int *array, int idx)
  46 {
  47         int i;
  48         for (i = 0; i < idx; i++) {
  49                 if (array[i] == -1)
  50                         return 0;
  51         }
  52         return 1;
  53 }
  54
  55
  56 static int sme_set_sae_group(struct wpa_supplicant *wpa_s)
  57 {
  58         int *groups = wpa_s->conf->sae_groups;
  59         int default_groups[] = { 19, 20, 21, 25, 26 };
  60
  61         if (!groups)
  62                 groups = default_groups;
  63
  64         /* Configuration may have changed, so validate current index */
  65         if (!index_within_array(groups, wpa_s->sme.sae_group_index))
  66                 return -1;
  67
  68         for (;;) {
  69                 int group = groups[wpa_s->sme.sae_group_index];
  70                 if (group < 0)
  71                         break;
  72                 if (sae_set_group(&wpa_s->sme.sae, group) == 0) {
  73                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected SAE group %d",
  74                                 wpa_s->sme.sae.group);
  75                        return 0;
  76                 }
  77                 wpa_s->sme.sae_group_index++;
  78         }
  79
  80         return -1;
  81 }
  82
  83
  84 static struct wpabuf * sme_auth_build_sae_commit(struct wpa_supplicant *wpa_s,
  85                                                  struct wpa_ssid *ssid,
  86                                                  const u8 *bssid)
  87 {
  88         struct wpabuf *buf;
  89         size_t len;
  90
  91         if (ssid->passphrase == NULL) {
  92                 wpa_printf(MSG_DEBUG, "SAE: No password available");
  93                 return NULL;
  94         }
  95
  96         if (sme_set_sae_group(wpa_s) < 0) {
  97                 wpa_printf(MSG_DEBUG, "SAE: Failed to select group");
  98                 return NULL;
  99         }
 100
 101         if (sae_prepare_commit(wpa_s->own_addr, bssid,
 102                                (u8 *) ssid->passphrase,
 103                                os_strlen(ssid->passphrase),
 104                                &wpa_s->sme.sae) < 0) {
 105                 wpa_printf(MSG_DEBUG, "SAE: Could not pick PWE");
 106                 return NULL;
 107         }
 108
 109         len = wpa_s->sme.sae_token ? wpabuf_len(wpa_s->sme.sae_token) : 0;
 110         buf = wpabuf_alloc(4 + SAE_COMMIT_MAX_LEN + len);
 111         if (buf == NULL)
 112                 return NULL;
 113
 114         wpabuf_put_le16(buf, 1); /* Transaction seq# */
 115         wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
 116         sae_write_commit(&wpa_s->sme.sae, buf, wpa_s->sme.sae_token);
 117
 118         return buf;
 119 }
 120
 121
 122 static struct wpabuf * sme_auth_build_sae_confirm(struct wpa_supplicant *wpa_s)
 123 {
 124         struct wpabuf *buf;
 125
 126         buf = wpabuf_alloc(4 + SAE_CONFIRM_MAX_LEN);
 127         if (buf == NULL)
 128                 return NULL;
 129
 130         wpabuf_put_le16(buf, 2); /* Transaction seq# */
 131         wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
 132         sae_write_confirm(&wpa_s->sme.sae, buf);
 133
 134         return buf;
 135 }
 136
 137 #endif /* CONFIG_SAE */
 138
 139
 140 static void sme_send_authentication(struct wpa_supplicant *wpa_s,
 141                                     struct wpa_bss *bss, struct wpa_ssid *ssid,
 142                                     int start)
 143 {
 144         struct wpa_driver_auth_params params;
 145         struct wpa_ssid *old_ssid;
 146 #ifdef CONFIG_IEEE80211R
 147         const u8 *ie;
 148 #endif /* CONFIG_IEEE80211R */
 149 #ifdef CONFIG_IEEE80211R
 150         const u8 *md = NULL;
 151 #endif /* CONFIG_IEEE80211R */
 152         int i, bssid_changed;
 153         struct wpabuf *resp = NULL;
 154         u8 ext_capab[10];
 155         int ext_capab_len;
 156
 157         if (bss == NULL) {
 158                 wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for "
 159                         "the network");
 160                 return;
 161         }
 162
 163         wpa_s->current_bss = bss;
 164
 165         os_memset(&params, 0, sizeof(params));
 166         wpa_s->reassociate = 0;
 167
 168         params.freq = bss->freq;
 169         params.bssid = bss->bssid;
 170         params.ssid = bss->ssid;
 171         params.ssid_len = bss->ssid_len;
 172         params.p2p = ssid->p2p_group;
 173
 174         if (wpa_s->sme.ssid_len != params.ssid_len ||
 175             os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
 176                 wpa_s->sme.prev_bssid_set = 0;
 177
 178         wpa_s->sme.freq = params.freq;
 179         os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
 180         wpa_s->sme.ssid_len = params.ssid_len;
 181
 182         params.auth_alg = WPA_AUTH_ALG_OPEN;
 183 #ifdef IEEE8021X_EAPOL
 184         if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
 185                 if (ssid->leap) {
 186                         if (ssid->non_leap == 0)
 187                                 params.auth_alg = WPA_AUTH_ALG_LEAP;
 188                         else
 189                                 params.auth_alg |= WPA_AUTH_ALG_LEAP;
 190                 }
 191         }
 192 #endif /* IEEE8021X_EAPOL */
 193         wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
 194                 params.auth_alg);
 195         if (ssid->auth_alg) {
 196                 params.auth_alg = ssid->auth_alg;
 197                 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
 198                         "0x%x", params.auth_alg);
 199         }
 200 #ifdef CONFIG_SAE
 201         if (wpa_key_mgmt_sae(ssid->key_mgmt)) {
 202                 const u8 *rsn;
 203                 struct wpa_ie_data ied;
 204
 205                 rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 206                 if (rsn &&
 207                     wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0) {
 208                         if (wpa_key_mgmt_sae(ied.key_mgmt)) {
 209                                 wpa_dbg(wpa_s, MSG_DEBUG, "Using SAE auth_alg");
 210                                 params.auth_alg = WPA_AUTH_ALG_SAE;
 211                         }
 212                 }
 213         }
 214 #endif /* CONFIG_SAE */
 215
 216         for (i = 0; i < NUM_WEP_KEYS; i++) {
 217                 if (ssid->wep_key_len[i])
 218                         params.wep_key[i] = ssid->wep_key[i];
 219                 params.wep_key_len[i] = ssid->wep_key_len[i];
 220         }
 221         params.wep_tx_keyidx = ssid->wep_tx_keyidx;
 222
 223         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 224         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 225         os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
 226         if (bssid_changed)
 227                 wpas_notify_bssid_changed(wpa_s);
 228
 229         if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
 230              wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
 231             wpa_key_mgmt_wpa(ssid->key_mgmt)) {
 232                 int try_opportunistic;
 233                 try_opportunistic = (ssid->proactive_key_caching < 0 ?
 234                                      wpa_s->conf->okc :
 235                                      ssid->proactive_key_caching) &&
 236                         (ssid->proto & WPA_PROTO_RSN);
 237                 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
 238                                             wpa_s->current_ssid,
 239                                             try_opportunistic) == 0)
 240                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
 241                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 242                 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
 243                                               wpa_s->sme.assoc_req_ie,
 244                                               &wpa_s->sme.assoc_req_ie_len)) {
 245                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 246                                 "key management and encryption suites");
 247                         return;
 248                 }
 249         } else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
 250                    wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) {
 251                 /*
 252                  * Both WPA and non-WPA IEEE 802.1X enabled in configuration -
 253                  * use non-WPA since the scan results did not indicate that the
 254                  * AP is using WPA or WPA2.
 255                  */
 256                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 257                 wpa_s->sme.assoc_req_ie_len = 0;
 258         } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
 259                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 260                 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
 261                                               wpa_s->sme.assoc_req_ie,
 262                                               &wpa_s->sme.assoc_req_ie_len)) {
 263                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 264                                 "key management and encryption suites (no "
 265                                 "scan results)");
 266                         return;
 267                 }
 268 #ifdef CONFIG_WPS
 269         } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 270                 struct wpabuf *wps_ie;
 271                 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
 272                 if (wps_ie && wpabuf_len(wps_ie) <=
 273                     sizeof(wpa_s->sme.assoc_req_ie)) {
 274                         wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
 275                         os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
 276                                   wpa_s->sme.assoc_req_ie_len);
 277                 } else
 278                         wpa_s->sme.assoc_req_ie_len = 0;
 279                 wpabuf_free(wps_ie);
 280                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 281 #endif /* CONFIG_WPS */
 282         } else {
 283                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 284                 wpa_s->sme.assoc_req_ie_len = 0;
 285         }
 286
 287 #ifdef CONFIG_IEEE80211R
 288         ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
 289         if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
 290                 md = ie + 2;
 291         wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
 292         if (md) {
 293                 /* Prepare for the next transition */
 294                 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
 295         }
 296
 297         if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) {
 298                 if (wpa_s->sme.assoc_req_ie_len + 5 <
 299                     sizeof(wpa_s->sme.assoc_req_ie)) {
 300                         struct rsn_mdie *mdie;
 301                         u8 *pos = wpa_s->sme.assoc_req_ie +
 302                                 wpa_s->sme.assoc_req_ie_len;
 303                         *pos++ = WLAN_EID_MOBILITY_DOMAIN;
 304                         *pos++ = sizeof(*mdie);
 305                         mdie = (struct rsn_mdie *) pos;
 306                         os_memcpy(mdie->mobility_domain, md,
 307                                   MOBILITY_DOMAIN_ID_LEN);
 308                         mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
 309                         wpa_s->sme.assoc_req_ie_len += 5;
 310                 }
 311
 312                 if (wpa_s->sme.ft_used &&
 313                     os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
 314                     wpa_sm_has_ptk(wpa_s->wpa)) {
 315                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT "
 316                                 "over-the-air");
 317                         params.auth_alg = WPA_AUTH_ALG_FT;
 318                         params.ie = wpa_s->sme.ft_ies;
 319                         params.ie_len = wpa_s->sme.ft_ies_len;
 320                 }
 321         }
 322 #endif /* CONFIG_IEEE80211R */
 323
 324 #ifdef CONFIG_IEEE80211W
 325         wpa_s->sme.mfp = ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
 326                 wpa_s->conf->pmf : ssid->ieee80211w;
 327         if (wpa_s->sme.mfp != NO_MGMT_FRAME_PROTECTION) {
 328                 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 329                 struct wpa_ie_data _ie;
 330                 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
 331                     _ie.capabilities &
 332                     (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
 333                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
 334                                 "MFP: require MFP");
 335                         wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
 336                 }
 337         }
 338 #endif /* CONFIG_IEEE80211W */
 339
 340 #ifdef CONFIG_P2P
 341         if (wpa_s->global->p2p) {
 342                 u8 *pos;
 343                 size_t len;
 344                 int res;
 345                 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
 346                 len = sizeof(wpa_s->sme.assoc_req_ie) -
 347                         wpa_s->sme.assoc_req_ie_len;
 348                 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
 349                                             ssid->p2p_group);
 350                 if (res >= 0)
 351                         wpa_s->sme.assoc_req_ie_len += res;
 352         }
 353 #endif /* CONFIG_P2P */
 354
 355 #ifdef CONFIG_HS20
 356         if (is_hs20_network(wpa_s, ssid, bss)) {
 357                 struct wpabuf *hs20;
 358                 hs20 = wpabuf_alloc(20);
 359                 if (hs20) {
 360                         wpas_hs20_add_indication(hs20);
 361                         os_memcpy(wpa_s->sme.assoc_req_ie +
 362                                   wpa_s->sme.assoc_req_ie_len,
 363                                   wpabuf_head(hs20), wpabuf_len(hs20));
 364                         wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
 365                         wpabuf_free(hs20);
 366                 }
 367         }
 368 #endif /* CONFIG_HS20 */
 369
 370         ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab);
 371         if (ext_capab_len > 0) {
 372                 u8 *pos = wpa_s->sme.assoc_req_ie;
 373                 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
 374                         pos += 2 + pos[1];
 375                 os_memmove(pos + ext_capab_len, pos,
 376                            wpa_s->sme.assoc_req_ie_len -
 377                            (pos - wpa_s->sme.assoc_req_ie));
 378                 wpa_s->sme.assoc_req_ie_len += ext_capab_len;
 379                 os_memcpy(pos, ext_capab, ext_capab_len);
 380         }
 381
 382 #ifdef CONFIG_SAE
 383         if (params.auth_alg == WPA_AUTH_ALG_SAE) {
 384                 if (start)
 385                         resp = sme_auth_build_sae_commit(wpa_s, ssid,
 386                                                          bss->bssid);
 387                 else
 388                         resp = sme_auth_build_sae_confirm(wpa_s);
 389                 if (resp == NULL)
 390                         return;
 391                 params.sae_data = wpabuf_head(resp);
 392                 params.sae_data_len = wpabuf_len(resp);
 393                 wpa_s->sme.sae.state = start ? SAE_COMMITTED : SAE_CONFIRMED;
 394         }
 395 #endif /* CONFIG_SAE */
 396
 397         wpa_supplicant_cancel_sched_scan(wpa_s);
 398         wpa_supplicant_cancel_scan(wpa_s);
 399
 400         wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
 401                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 402                 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
 403
 404         wpa_clear_keys(wpa_s, bss->bssid);
 405         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 406         old_ssid = wpa_s->current_ssid;
 407         wpa_s->current_ssid = ssid;
 408         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
 409         wpa_supplicant_initiate_eapol(wpa_s);
 410         if (old_ssid != wpa_s->current_ssid)
 411                 wpas_notify_network_changed(wpa_s);
 412
 413         wpa_s->sme.auth_alg = params.auth_alg;
 414         if (wpa_drv_authenticate(wpa_s, &params) < 0) {
 415                 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
 416                         "driver failed");
 417                 wpas_connection_failed(wpa_s, bss->bssid);
 418                 wpa_supplicant_mark_disassoc(wpa_s);
 419                 wpabuf_free(resp);
 420                 return;
 421         }
 422
 423         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 424                                NULL);
 425
 426         /*
 427          * Association will be started based on the authentication event from
 428          * the driver.
 429          */
 430
 431         wpabuf_free(resp);
 432 }
 433
 434
 435 void sme_authenticate(struct wpa_supplicant *wpa_s,
 436                       struct wpa_bss *bss, struct wpa_ssid *ssid)
 437 {
 438 #ifdef CONFIG_SAE
 439         wpa_s->sme.sae.state = SAE_NOTHING;
 440         wpa_s->sme.sae.send_confirm = 0;
 441 #endif /* CONFIG_SAE */
 442         sme_send_authentication(wpa_s, bss, ssid, 1);
 443 }
 444
 445
 446 #ifdef CONFIG_SAE
 447
 448 static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
 449                         u16 status_code, const u8 *data, size_t len)
 450 {
 451         wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
 452                 "status code %u", auth_transaction, status_code);
 453
 454         if (auth_transaction == 1 &&
 455             status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
 456             wpa_s->sme.sae.state == SAE_COMMITTED &&
 457             wpa_s->current_bss && wpa_s->current_ssid) {
 458                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE anti-clogging token "
 459                         "requested");
 460                 wpabuf_free(wpa_s->sme.sae_token);
 461                 wpa_s->sme.sae_token = wpabuf_alloc_copy(data, len);
 462                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 463                                         wpa_s->current_ssid, 1);
 464                 return 0;
 465         }
 466
 467         if (auth_transaction == 1 &&
 468             status_code == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED &&
 469             wpa_s->sme.sae.state == SAE_COMMITTED &&
 470             wpa_s->current_bss && wpa_s->current_ssid) {
 471                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE group not supported");
 472                 wpa_s->sme.sae_group_index++;
 473                 if (sme_set_sae_group(wpa_s) < 0)
 474                         return -1; /* no other groups enabled */
 475                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Try next enabled SAE group");
 476                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 477                                         wpa_s->current_ssid, 1);
 478                 return 0;
 479         }
 480
 481         if (status_code != WLAN_STATUS_SUCCESS)
 482                 return -1;
 483
 484         if (auth_transaction == 1) {
 485                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
 486                 if (wpa_s->current_bss == NULL ||
 487                     wpa_s->current_ssid == NULL)
 488                         return -1;
 489                 if (wpa_s->sme.sae.state != SAE_COMMITTED)
 490                         return -1;
 491                 if (sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL,
 492                                      wpa_s->conf->sae_groups) !=
 493                     WLAN_STATUS_SUCCESS)
 494                         return -1;
 495
 496                 if (sae_process_commit(&wpa_s->sme.sae) < 0) {
 497                         wpa_printf(MSG_DEBUG, "SAE: Failed to process peer "
 498                                    "commit");
 499                         return -1;
 500                 }
 501
 502                 wpabuf_free(wpa_s->sme.sae_token);
 503                 wpa_s->sme.sae_token = NULL;
 504                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 505                                         wpa_s->current_ssid, 0);
 506                 return 0;
 507         } else if (auth_transaction == 2) {
 508                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
 509                 if (wpa_s->sme.sae.state != SAE_CONFIRMED)
 510                         return -1;
 511                 if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0)
 512                         return -1;
 513                 wpa_s->sme.sae.state = SAE_ACCEPTED;
 514                 sae_clear_temp_data(&wpa_s->sme.sae);
 515                 return 1;
 516         }
 517
 518         return -1;
 519 }
 520 #endif /* CONFIG_SAE */
 521
 522
 523 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
 524 {
 525         struct wpa_ssid *ssid = wpa_s->current_ssid;
 526
 527         if (ssid == NULL) {
 528                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 529                         "when network is not selected");
 530                 return;
 531         }
 532
 533         if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
 534                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 535                         "when not in authenticating state");
 536                 return;
 537         }
 538
 539         if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
 540                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
 541                         "unexpected peer " MACSTR,
 542                         MAC2STR(data->auth.peer));
 543                 return;
 544         }
 545
 546         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
 547                 " auth_type=%d auth_transaction=%d status_code=%d",
 548                 MAC2STR(data->auth.peer), data->auth.auth_type,
 549                 data->auth.auth_transaction, data->auth.status_code);
 550         wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
 551                     data->auth.ies, data->auth.ies_len);
 552
 553         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 554
 555 #ifdef CONFIG_SAE
 556         if (data->auth.auth_type == WLAN_AUTH_SAE) {
 557                 int res;
 558                 res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
 559                                    data->auth.status_code, data->auth.ies,
 560                                    data->auth.ies_len);
 561                 if (res < 0) {
 562                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 563                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 564
 565                 }
 566                 if (res != 1)
 567                         return;
 568
 569                 wpa_printf(MSG_DEBUG, "SME: SAE completed - setting PMK for "
 570                            "4-way handshake");
 571                 wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN);
 572         }
 573 #endif /* CONFIG_SAE */
 574
 575         if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
 576                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
 577                         "code %d)", data->auth.status_code);
 578
 579                 if (data->auth.status_code !=
 580                     WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
 581                     wpa_s->sme.auth_alg == data->auth.auth_type ||
 582                     wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
 583                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 584                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 585                         return;
 586                 }
 587
 588                 switch (data->auth.auth_type) {
 589                 case WLAN_AUTH_OPEN:
 590                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 591
 592                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
 593                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 594                                                  wpa_s->current_ssid);
 595                         return;
 596
 597                 case WLAN_AUTH_SHARED_KEY:
 598                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
 599
 600                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
 601                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 602                                                  wpa_s->current_ssid);
 603                         return;
 604
 605                 default:
 606                         return;
 607                 }
 608         }
 609
 610 #ifdef CONFIG_IEEE80211R
 611         if (data->auth.auth_type == WLAN_AUTH_FT) {
 612                 union wpa_event_data edata;
 613                 os_memset(&edata, 0, sizeof(edata));
 614                 edata.ft_ies.ies = data->auth.ies;
 615                 edata.ft_ies.ies_len = data->auth.ies_len;
 616                 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
 617                 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
 618         }
 619 #endif /* CONFIG_IEEE80211R */
 620
 621         sme_associate(wpa_s, ssid->mode, data->auth.peer,
 622                       data->auth.auth_type);
 623 }
 624
 625
 626 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
 627                    const u8 *bssid, u16 auth_type)
 628 {
 629         struct wpa_driver_associate_params params;
 630         struct ieee802_11_elems elems;
 631 #ifdef CONFIG_HT_OVERRIDES
 632         struct ieee80211_ht_capabilities htcaps;
 633         struct ieee80211_ht_capabilities htcaps_mask;
 634 #endif /* CONFIG_HT_OVERRIDES */
 635 #ifdef CONFIG_VHT_OVERRIDES
 636         struct ieee80211_vht_capabilities vhtcaps;
 637         struct ieee80211_vht_capabilities vhtcaps_mask;
 638 #endif /* CONFIG_VHT_OVERRIDES */
 639
 640         os_memset(&params, 0, sizeof(params));
 641         params.bssid = bssid;
 642         params.ssid = wpa_s->sme.ssid;
 643         params.ssid_len = wpa_s->sme.ssid_len;
 644         params.freq = wpa_s->sme.freq;
 645         params.bg_scan_period = wpa_s->current_ssid ?
 646                 wpa_s->current_ssid->bg_scan_period : -1;
 647         params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
 648                 wpa_s->sme.assoc_req_ie : NULL;
 649         params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
 650         params.pairwise_suite =
 651                 wpa_cipher_to_suite_driver(wpa_s->pairwise_cipher);
 652         params.group_suite = wpa_cipher_to_suite_driver(wpa_s->group_cipher);
 653 #ifdef CONFIG_HT_OVERRIDES
 654         os_memset(&htcaps, 0, sizeof(htcaps));
 655         os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
 656         params.htcaps = (u8 *) &htcaps;
 657         params.htcaps_mask = (u8 *) &htcaps_mask;
 658         wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, &params);
 659 #endif /* CONFIG_HT_OVERRIDES */
 660 #ifdef CONFIG_VHT_OVERRIDES
 661         os_memset(&vhtcaps, 0, sizeof(vhtcaps));
 662         os_memset(&vhtcaps_mask, 0, sizeof(vhtcaps_mask));
 663         params.vhtcaps = &vhtcaps;
 664         params.vhtcaps_mask = &vhtcaps_mask;
 665         wpa_supplicant_apply_vht_overrides(wpa_s, wpa_s->current_ssid, &params);
 666 #endif /* CONFIG_VHT_OVERRIDES */
 667 #ifdef CONFIG_IEEE80211R
 668         if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
 669                 params.wpa_ie = wpa_s->sme.ft_ies;
 670                 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
 671         }
 672 #endif /* CONFIG_IEEE80211R */
 673         params.mode = mode;
 674         params.mgmt_frame_protection = wpa_s->sme.mfp;
 675         if (wpa_s->sme.prev_bssid_set)
 676                 params.prev_bssid = wpa_s->sme.prev_bssid;
 677
 678         wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
 679                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 680                 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
 681                 params.freq);
 682
 683         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
 684
 685         if (params.wpa_ie == NULL ||
 686             ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
 687             < 0) {
 688                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
 689                 os_memset(&elems, 0, sizeof(elems));
 690         }
 691         if (elems.rsn_ie) {
 692                 params.wpa_proto = WPA_PROTO_RSN;
 693                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
 694                                         elems.rsn_ie_len + 2);
 695         } else if (elems.wpa_ie) {
 696                 params.wpa_proto = WPA_PROTO_WPA;
 697                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
 698                                         elems.wpa_ie_len + 2);
 699         } else
 700                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 701         if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
 702                 params.p2p = 1;
 703
 704         if (wpa_s->parent->set_sta_uapsd)
 705                 params.uapsd = wpa_s->parent->sta_uapsd;
 706         else
 707                 params.uapsd = -1;
 708
 709         if (wpa_drv_associate(wpa_s, &params) < 0) {
 710                 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
 711                         "driver failed");
 712                 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 713                 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 714                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 715                 return;
 716         }
 717
 718         eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
 719                                NULL);
 720 }
 721
 722
 723 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
 724                       const u8 *ies, size_t ies_len)
 725 {
 726         if (md == NULL || ies == NULL) {
 727                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
 728                 os_free(wpa_s->sme.ft_ies);
 729                 wpa_s->sme.ft_ies = NULL;
 730                 wpa_s->sme.ft_ies_len = 0;
 731                 wpa_s->sme.ft_used = 0;
 732                 return 0;
 733         }
 734
 735         os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
 736         wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
 737         os_free(wpa_s->sme.ft_ies);
 738         wpa_s->sme.ft_ies = os_malloc(ies_len);
 739         if (wpa_s->sme.ft_ies == NULL)
 740                 return -1;
 741         os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
 742         wpa_s->sme.ft_ies_len = ies_len;
 743         return 0;
 744 }
 745
 746
 747 static void sme_deauth(struct wpa_supplicant *wpa_s)
 748 {
 749         int bssid_changed;
 750
 751         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 752
 753         if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
 754                                    WLAN_REASON_DEAUTH_LEAVING) < 0) {
 755                 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
 756                         "failed");
 757         }
 758         wpa_s->sme.prev_bssid_set = 0;
 759
 760         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 761         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 762         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 763         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 764         if (bssid_changed)
 765                 wpas_notify_bssid_changed(wpa_s);
 766 }
 767
 768
 769 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
 770                             union wpa_event_data *data)
 771 {
 772         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
 773                 "status code %d", MAC2STR(wpa_s->pending_bssid),
 774                 data->assoc_reject.status_code);
 775
 776         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 777
 778         /*
 779          * For now, unconditionally terminate the previous authentication. In
 780          * theory, this should not be needed, but mac80211 gets quite confused
 781          * if the authentication is left pending.. Some roaming cases might
 782          * benefit from using the previous authentication, so this could be
 783          * optimized in the future.
 784          */
 785         sme_deauth(wpa_s);
 786 }
 787
 788
 789 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
 790                               union wpa_event_data *data)
 791 {
 792         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
 793         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 794         wpa_supplicant_mark_disassoc(wpa_s);
 795 }
 796
 797
 798 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
 799                                union wpa_event_data *data)
 800 {
 801         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
 802         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 803         wpa_supplicant_mark_disassoc(wpa_s);
 804 }
 805
 806
 807 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
 808                         struct disassoc_info *info)
 809 {
 810         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
 811         if (wpa_s->sme.prev_bssid_set) {
 812                 /*
 813                  * cfg80211/mac80211 can get into somewhat confused state if
 814                  * the AP only disassociates us and leaves us in authenticated
 815                  * state. For now, force the state to be cleared to avoid
 816                  * confusing errors if we try to associate with the AP again.
 817                  */
 818                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
 819                         "driver state");
 820                 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
 821                                        WLAN_REASON_DEAUTH_LEAVING);
 822         }
 823 }
 824
 825
 826 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
 827 {
 828         struct wpa_supplicant *wpa_s = eloop_ctx;
 829         if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
 830                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
 831                 sme_deauth(wpa_s);
 832         }
 833 }
 834
 835
 836 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
 837 {
 838         struct wpa_supplicant *wpa_s = eloop_ctx;
 839         if (wpa_s->wpa_state == WPA_ASSOCIATING) {
 840                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
 841                 sme_deauth(wpa_s);
 842         }
 843 }
 844
 845
 846 void sme_state_changed(struct wpa_supplicant *wpa_s)
 847 {
 848         /* Make sure timers are cleaned up appropriately. */
 849         if (wpa_s->wpa_state != WPA_ASSOCIATING)
 850                 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 851         if (wpa_s->wpa_state != WPA_AUTHENTICATING)
 852                 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 853 }
 854
 855
 856 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
 857                                        const u8 *prev_pending_bssid)
 858 {
 859         /*
 860          * mac80211-workaround to force deauth on failed auth cmd,
 861          * requires us to remain in authenticating state to allow the
 862          * second authentication attempt to be continued properly.
 863          */
 864         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
 865                 "to proceed after disconnection event");
 866         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 867         os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
 868
 869         /*
 870          * Re-arm authentication timer in case auth fails for whatever reason.
 871          */
 872         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 873         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 874                                NULL);
 875 }
 876
 877
 878 void sme_deinit(struct wpa_supplicant *wpa_s)
 879 {
 880         os_free(wpa_s->sme.ft_ies);
 881         wpa_s->sme.ft_ies = NULL;
 882         wpa_s->sme.ft_ies_len = 0;
 883 #ifdef CONFIG_IEEE80211W
 884         sme_stop_sa_query(wpa_s);
 885 #endif /* CONFIG_IEEE80211W */
 886 #ifdef CONFIG_SAE
 887         wpabuf_free(wpa_s->sme.sae_token);
 888         wpa_s->sme.sae_token = NULL;
 889         sae_clear_data(&wpa_s->sme.sae);
 890 #endif /* CONFIG_SAE */
 891
 892         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 893         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 894         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
 895 }
 896
 897
 898 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
 899                                    const u8 *chan_list, u8 num_channels,
 900                                    u8 num_intol)
 901 {
 902         struct ieee80211_2040_bss_coex_ie *bc_ie;
 903         struct ieee80211_2040_intol_chan_report *ic_report;
 904         struct wpabuf *buf;
 905
 906         wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR,
 907                    MAC2STR(wpa_s->bssid));
 908
 909         buf = wpabuf_alloc(2 + /* action.category + action_code */
 910                            sizeof(struct ieee80211_2040_bss_coex_ie) +
 911                            sizeof(struct ieee80211_2040_intol_chan_report) +
 912                            num_channels);
 913         if (buf == NULL)
 914                 return;
 915
 916         wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
 917         wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
 918
 919         bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
 920         bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
 921         bc_ie->length = 1;
 922         if (num_intol)
 923                 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
 924
 925         if (num_channels > 0) {
 926                 ic_report = wpabuf_put(buf, sizeof(*ic_report));
 927                 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
 928                 ic_report->length = num_channels + 1;
 929                 ic_report->op_class = 0;
 930                 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
 931                           num_channels);
 932         }
 933
 934         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
 935                                 wpa_s->own_addr, wpa_s->bssid,
 936                                 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
 937                 wpa_msg(wpa_s, MSG_INFO,
 938                         "SME: Failed to send 20/40 BSS Coexistence frame");
 939         }
 940
 941         wpabuf_free(buf);
 942 }
 943
 944
 945 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
 946 {
 947         struct wpa_bss *bss;
 948         const u8 *ie;
 949         u16 ht_cap;
 950         u8 chan_list[P2P_MAX_CHANNELS], channel;
 951         u8 num_channels = 0, num_intol = 0, i;
 952
 953         if (!wpa_s->sme.sched_obss_scan)
 954                 return 0;
 955
 956         wpa_s->sme.sched_obss_scan = 0;
 957         if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
 958                 return 1;
 959
 960         /*
 961          * Check whether AP uses regulatory triplet or channel triplet in
 962          * country info. Right now the operating class of the BSS channel
 963          * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
 964          * based on the assumption that operating class triplet is not used in
 965          * beacon frame. If the First Channel Number/Operating Extension
 966          * Identifier octet has a positive integer value of 201 or greater,
 967          * then its operating class triplet.
 968          *
 969          * TODO: If Supported Operating Classes element is present in beacon
 970          * frame, have to lookup operating class in Annex E and fill them in
 971          * 2040 coex frame.
 972          */
 973         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
 974         if (ie && (ie[1] >= 6) && (ie[5] >= 201))
 975                 return 1;
 976
 977         os_memset(chan_list, 0, sizeof(chan_list));
 978
 979         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
 980                 /* Skip other band bss */
 981                 enum hostapd_hw_mode mode;
 982                 mode = ieee80211_freq_to_chan(bss->freq, &channel);
 983                 if (mode != HOSTAPD_MODE_IEEE80211G &&
 984                     mode != HOSTAPD_MODE_IEEE80211B)
 985                         continue;
 986
 987                 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
 988                 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
 989
 990                 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
 991                         /* Check whether the channel is already considered */
 992                         for (i = 0; i < num_channels; i++) {
 993                                 if (channel == chan_list[i])
 994                                         break;
 995                         }
 996                         if (i != num_channels)
 997                                 continue;
 998
 999                         if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
1000                                 num_intol++;
1001
1002                         chan_list[num_channels++] = channel;
1003                 }
1004         }
1005
1006         sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
1007         return 1;
1008 }
1009
1010
1011 static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
1012                                           u16 num_modes,
1013                                           enum hostapd_hw_mode mode)
1014 {
1015         u16 i;
1016
1017         for (i = 0; i < num_modes; i++) {
1018                 if (modes[i].mode == mode)
1019                         return &modes[i];
1020         }
1021
1022         return NULL;
1023 }
1024
1025
1026 static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s,
1027                                         enum hostapd_hw_mode band,
1028                                         struct wpa_driver_scan_params *params)
1029 {
1030         /* Include only supported channels for the specified band */
1031         struct hostapd_hw_modes *mode;
1032         int count, i;
1033
1034         mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band);
1035         if (mode == NULL) {
1036                 /* No channels supported in this band - use empty list */
1037                 params->freqs = os_zalloc(sizeof(int));
1038                 return;
1039         }
1040
1041         params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
1042         if (params->freqs == NULL)
1043                 return;
1044         for (count = 0, i = 0; i < mode->num_channels; i++) {
1045                 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
1046                         continue;
1047                 params->freqs[count++] = mode->channels[i].freq;
1048         }
1049 }
1050
1051
1052 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1053 {
1054         struct wpa_supplicant *wpa_s = eloop_ctx;
1055         struct wpa_driver_scan_params params;
1056
1057         if (!wpa_s->current_bss) {
1058                 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
1059                 return;
1060         }
1061
1062         os_memset(&params, 0, sizeof(params));
1063         wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G, &params);
1064         wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
1065
1066         if (wpa_supplicant_trigger_scan(wpa_s, &params))
1067                 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
1068         else
1069                 wpa_s->sme.sched_obss_scan = 1;
1070         os_free(params.freqs);
1071
1072         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1073                                sme_obss_scan_timeout, wpa_s, NULL);
1074 }
1075
1076
1077 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
1078 {
1079         const u8 *ie;
1080         struct wpa_bss *bss = wpa_s->current_bss;
1081         struct wpa_ssid *ssid = wpa_s->current_ssid;
1082         struct hostapd_hw_modes *hw_mode = NULL;
1083         int i;
1084
1085         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1086         wpa_s->sme.sched_obss_scan = 0;
1087         if (!enable)
1088                 return;
1089
1090         /*
1091          * Schedule OBSS scan if driver is using station SME in wpa_supplicant
1092          * or it expects OBSS scan to be performed by wpa_supplicant.
1093          */
1094         if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
1095               (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
1096             ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
1097                 return;
1098
1099         if (!wpa_s->hw.modes)
1100                 return;
1101
1102         /* only HT caps in 11g mode are relevant */
1103         for (i = 0; i < wpa_s->hw.num_modes; i++) {
1104                 hw_mode = &wpa_s->hw.modes[i];
1105                 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
1106                         break;
1107         }
1108
1109         /* Driver does not support HT40 for 11g or doesn't have 11g. */
1110         if (i == wpa_s->hw.num_modes || !hw_mode ||
1111             !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1112                 return;
1113
1114         if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
1115                 return; /* Not associated on 2.4 GHz band */
1116
1117         /* Check whether AP supports HT40 */
1118         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
1119         if (!ie || ie[1] < 2 ||
1120             !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1121                 return; /* AP does not support HT40 */
1122
1123         ie = wpa_bss_get_ie(wpa_s->current_bss,
1124                             WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
1125         if (!ie || ie[1] < 14)
1126                 return; /* AP does not request OBSS scans */
1127
1128         wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
1129         if (wpa_s->sme.obss_scan_int < 10) {
1130                 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
1131                            "replaced with the minimum 10 sec",
1132                            wpa_s->sme.obss_scan_int);
1133                 wpa_s->sme.obss_scan_int = 10;
1134         }
1135         wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
1136                    wpa_s->sme.obss_scan_int);
1137         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1138                                sme_obss_scan_timeout, wpa_s, NULL);
1139 }
1140
1141
1142 #ifdef CONFIG_IEEE80211W
1143
1144 static const unsigned int sa_query_max_timeout = 1000;
1145 static const unsigned int sa_query_retry_timeout = 201;
1146
1147 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
1148 {
1149         u32 tu;
1150         struct os_time now, passed;
1151         os_get_time(&now);
1152         os_time_sub(&now, &wpa_s->sme.sa_query_start, &passed);
1153         tu = (passed.sec * 1000000 + passed.usec) / 1024;
1154         if (sa_query_max_timeout < tu) {
1155                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
1156                 sme_stop_sa_query(wpa_s);
1157                 wpa_supplicant_deauthenticate(
1158                         wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
1159                 return 1;
1160         }
1161
1162         return 0;
1163 }
1164
1165
1166 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
1167                                   const u8 *trans_id)
1168 {
1169         u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
1170         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
1171                 MACSTR, MAC2STR(wpa_s->bssid));
1172         wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
1173                     trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1174         req[0] = WLAN_ACTION_SA_QUERY;
1175         req[1] = WLAN_SA_QUERY_REQUEST;
1176         os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1177         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1178                                 wpa_s->own_addr, wpa_s->bssid,
1179                                 req, sizeof(req), 0) < 0)
1180                 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
1181                         "Request");
1182 }
1183
1184
1185 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
1186 {
1187         struct wpa_supplicant *wpa_s = eloop_ctx;
1188         unsigned int timeout, sec, usec;
1189         u8 *trans_id, *nbuf;
1190
1191         if (wpa_s->sme.sa_query_count > 0 &&
1192             sme_check_sa_query_timeout(wpa_s))
1193                 return;
1194
1195         nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
1196                                 wpa_s->sme.sa_query_count + 1,
1197                                 WLAN_SA_QUERY_TR_ID_LEN);
1198         if (nbuf == NULL)
1199                 return;
1200         if (wpa_s->sme.sa_query_count == 0) {
1201                 /* Starting a new SA Query procedure */
1202                 os_get_time(&wpa_s->sme.sa_query_start);
1203         }
1204         trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
1205         wpa_s->sme.sa_query_trans_id = nbuf;
1206         wpa_s->sme.sa_query_count++;
1207
1208         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1209
1210         timeout = sa_query_retry_timeout;
1211         sec = ((timeout / 1000) * 1024) / 1000;
1212         usec = (timeout % 1000) * 1024;
1213         eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
1214
1215         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
1216                 wpa_s->sme.sa_query_count);
1217
1218         sme_send_sa_query_req(wpa_s, trans_id);
1219 }
1220
1221
1222 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
1223 {
1224         sme_sa_query_timer(wpa_s, NULL);
1225 }
1226
1227
1228 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
1229 {
1230         eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
1231         os_free(wpa_s->sme.sa_query_trans_id);
1232         wpa_s->sme.sa_query_trans_id = NULL;
1233         wpa_s->sme.sa_query_count = 0;
1234 }
1235
1236
1237 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1238                                  const u8 *da, u16 reason_code)
1239 {
1240         struct wpa_ssid *ssid;
1241
1242         if (wpa_s->wpa_state != WPA_COMPLETED)
1243                 return;
1244         ssid = wpa_s->current_ssid;
1245         if (ssid == NULL ||
1246             (ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
1247              wpa_s->conf->pmf : ssid->ieee80211w) == NO_MGMT_FRAME_PROTECTION)
1248                 return;
1249         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1250                 return;
1251         if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1252             reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1253                 return;
1254         if (wpa_s->sme.sa_query_count > 0)
1255                 return;
1256
1257         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1258                 "possible AP/STA state mismatch - trigger SA Query");
1259         sme_start_sa_query(wpa_s);
1260 }
1261
1262
1263 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1264                      const u8 *data, size_t len)
1265 {
1266         int i;
1267
1268         if (wpa_s->sme.sa_query_trans_id == NULL ||
1269             len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1270             data[0] != WLAN_SA_QUERY_RESPONSE)
1271                 return;
1272         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1273                 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1274
1275         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1276                 return;
1277
1278         for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1279                 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1280                               i * WLAN_SA_QUERY_TR_ID_LEN,
1281                               data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1282                         break;
1283         }
1284
1285         if (i >= wpa_s->sme.sa_query_count) {
1286                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1287                         "transaction identifier found");
1288                 return;
1289         }
1290
1291         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1292                 "from " MACSTR, MAC2STR(sa));
1293         sme_stop_sa_query(wpa_s);
1294 }
1295
1296 #endif /* CONFIG_IEEE80211W */