contrib/wpa_supplicant/wpa_supplicant/sme.c

   1 /*
   2  * wpa_supplicant - SME
   3  * Copyright (c) 2009-2014, 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] <= 0)
  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, 0 };
  60
  61         if (!groups || groups[0] <= 0)
  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                 wpas_connect_work_done(wpa_s);
 161                 return;
 162         }
 163
 164         wpa_s->current_bss = bss;
 165
 166         os_memset(&params, 0, sizeof(params));
 167         wpa_s->reassociate = 0;
 168
 169         params.freq = bss->freq;
 170         params.bssid = bss->bssid;
 171         params.ssid = bss->ssid;
 172         params.ssid_len = bss->ssid_len;
 173         params.p2p = ssid->p2p_group;
 174
 175         if (wpa_s->sme.ssid_len != params.ssid_len ||
 176             os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
 177                 wpa_s->sme.prev_bssid_set = 0;
 178
 179         wpa_s->sme.freq = params.freq;
 180         os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
 181         wpa_s->sme.ssid_len = params.ssid_len;
 182
 183         params.auth_alg = WPA_AUTH_ALG_OPEN;
 184 #ifdef IEEE8021X_EAPOL
 185         if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
 186                 if (ssid->leap) {
 187                         if (ssid->non_leap == 0)
 188                                 params.auth_alg = WPA_AUTH_ALG_LEAP;
 189                         else
 190                                 params.auth_alg |= WPA_AUTH_ALG_LEAP;
 191                 }
 192         }
 193 #endif /* IEEE8021X_EAPOL */
 194         wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
 195                 params.auth_alg);
 196         if (ssid->auth_alg) {
 197                 params.auth_alg = ssid->auth_alg;
 198                 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
 199                         "0x%x", params.auth_alg);
 200         }
 201 #ifdef CONFIG_SAE
 202         if (wpa_key_mgmt_sae(ssid->key_mgmt)) {
 203                 const u8 *rsn;
 204                 struct wpa_ie_data ied;
 205
 206                 rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 207                 if (rsn &&
 208                     wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0) {
 209                         if (wpa_key_mgmt_sae(ied.key_mgmt)) {
 210                                 wpa_dbg(wpa_s, MSG_DEBUG, "Using SAE auth_alg");
 211                                 params.auth_alg = WPA_AUTH_ALG_SAE;
 212                         }
 213                 }
 214         }
 215 #endif /* CONFIG_SAE */
 216
 217         for (i = 0; i < NUM_WEP_KEYS; i++) {
 218                 if (ssid->wep_key_len[i])
 219                         params.wep_key[i] = ssid->wep_key[i];
 220                 params.wep_key_len[i] = ssid->wep_key_len[i];
 221         }
 222         params.wep_tx_keyidx = ssid->wep_tx_keyidx;
 223
 224         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 225         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 226         os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
 227         if (bssid_changed)
 228                 wpas_notify_bssid_changed(wpa_s);
 229
 230         if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
 231              wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
 232             wpa_key_mgmt_wpa(ssid->key_mgmt)) {
 233                 int try_opportunistic;
 234                 try_opportunistic = (ssid->proactive_key_caching < 0 ?
 235                                      wpa_s->conf->okc :
 236                                      ssid->proactive_key_caching) &&
 237                         (ssid->proto & WPA_PROTO_RSN);
 238                 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
 239                                             wpa_s->current_ssid,
 240                                             try_opportunistic) == 0)
 241                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
 242                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 243                 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
 244                                               wpa_s->sme.assoc_req_ie,
 245                                               &wpa_s->sme.assoc_req_ie_len)) {
 246                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 247                                 "key management and encryption suites");
 248                         wpas_connect_work_done(wpa_s);
 249                         return;
 250                 }
 251         } else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
 252                    wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) {
 253                 /*
 254                  * Both WPA and non-WPA IEEE 802.1X enabled in configuration -
 255                  * use non-WPA since the scan results did not indicate that the
 256                  * AP is using WPA or WPA2.
 257                  */
 258                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 259                 wpa_s->sme.assoc_req_ie_len = 0;
 260         } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
 261                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 262                 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
 263                                               wpa_s->sme.assoc_req_ie,
 264                                               &wpa_s->sme.assoc_req_ie_len)) {
 265                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 266                                 "key management and encryption suites (no "
 267                                 "scan results)");
 268                         wpas_connect_work_done(wpa_s);
 269                         return;
 270                 }
 271 #ifdef CONFIG_WPS
 272         } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 273                 struct wpabuf *wps_ie;
 274                 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
 275                 if (wps_ie && wpabuf_len(wps_ie) <=
 276                     sizeof(wpa_s->sme.assoc_req_ie)) {
 277                         wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
 278                         os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
 279                                   wpa_s->sme.assoc_req_ie_len);
 280                 } else
 281                         wpa_s->sme.assoc_req_ie_len = 0;
 282                 wpabuf_free(wps_ie);
 283                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 284 #endif /* CONFIG_WPS */
 285         } else {
 286                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 287                 wpa_s->sme.assoc_req_ie_len = 0;
 288         }
 289
 290 #ifdef CONFIG_IEEE80211R
 291         ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
 292         if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
 293                 md = ie + 2;
 294         wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
 295         if (md) {
 296                 /* Prepare for the next transition */
 297                 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
 298         }
 299
 300         if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) {
 301                 if (wpa_s->sme.assoc_req_ie_len + 5 <
 302                     sizeof(wpa_s->sme.assoc_req_ie)) {
 303                         struct rsn_mdie *mdie;
 304                         u8 *pos = wpa_s->sme.assoc_req_ie +
 305                                 wpa_s->sme.assoc_req_ie_len;
 306                         *pos++ = WLAN_EID_MOBILITY_DOMAIN;
 307                         *pos++ = sizeof(*mdie);
 308                         mdie = (struct rsn_mdie *) pos;
 309                         os_memcpy(mdie->mobility_domain, md,
 310                                   MOBILITY_DOMAIN_ID_LEN);
 311                         mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
 312                         wpa_s->sme.assoc_req_ie_len += 5;
 313                 }
 314
 315                 if (wpa_s->sme.ft_used &&
 316                     os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
 317                     wpa_sm_has_ptk(wpa_s->wpa)) {
 318                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT "
 319                                 "over-the-air");
 320                         params.auth_alg = WPA_AUTH_ALG_FT;
 321                         params.ie = wpa_s->sme.ft_ies;
 322                         params.ie_len = wpa_s->sme.ft_ies_len;
 323                 }
 324         }
 325 #endif /* CONFIG_IEEE80211R */
 326
 327 #ifdef CONFIG_IEEE80211W
 328         wpa_s->sme.mfp = ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
 329                 wpa_s->conf->pmf : ssid->ieee80211w;
 330         if (wpa_s->sme.mfp != NO_MGMT_FRAME_PROTECTION) {
 331                 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 332                 struct wpa_ie_data _ie;
 333                 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
 334                     _ie.capabilities &
 335                     (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
 336                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
 337                                 "MFP: require MFP");
 338                         wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
 339                 }
 340         }
 341 #endif /* CONFIG_IEEE80211W */
 342
 343 #ifdef CONFIG_P2P
 344         if (wpa_s->global->p2p) {
 345                 u8 *pos;
 346                 size_t len;
 347                 int res;
 348                 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
 349                 len = sizeof(wpa_s->sme.assoc_req_ie) -
 350                         wpa_s->sme.assoc_req_ie_len;
 351                 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
 352                                             ssid->p2p_group);
 353                 if (res >= 0)
 354                         wpa_s->sme.assoc_req_ie_len += res;
 355         }
 356 #endif /* CONFIG_P2P */
 357
 358 #ifdef CONFIG_HS20
 359         if (is_hs20_network(wpa_s, ssid, bss)) {
 360                 struct wpabuf *hs20;
 361                 hs20 = wpabuf_alloc(20);
 362                 if (hs20) {
 363                         wpas_hs20_add_indication(hs20);
 364                         os_memcpy(wpa_s->sme.assoc_req_ie +
 365                                   wpa_s->sme.assoc_req_ie_len,
 366                                   wpabuf_head(hs20), wpabuf_len(hs20));
 367                         wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
 368                         wpabuf_free(hs20);
 369                 }
 370         }
 371 #endif /* CONFIG_HS20 */
 372
 373         ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab);
 374         if (ext_capab_len > 0) {
 375                 u8 *pos = wpa_s->sme.assoc_req_ie;
 376                 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
 377                         pos += 2 + pos[1];
 378                 os_memmove(pos + ext_capab_len, pos,
 379                            wpa_s->sme.assoc_req_ie_len -
 380                            (pos - wpa_s->sme.assoc_req_ie));
 381                 wpa_s->sme.assoc_req_ie_len += ext_capab_len;
 382                 os_memcpy(pos, ext_capab, ext_capab_len);
 383         }
 384
 385 #ifdef CONFIG_SAE
 386         if (params.auth_alg == WPA_AUTH_ALG_SAE) {
 387                 if (start)
 388                         resp = sme_auth_build_sae_commit(wpa_s, ssid,
 389                                                          bss->bssid);
 390                 else
 391                         resp = sme_auth_build_sae_confirm(wpa_s);
 392                 if (resp == NULL) {
 393                         wpas_connect_work_done(wpa_s);
 394                         return;
 395                 }
 396                 params.sae_data = wpabuf_head(resp);
 397                 params.sae_data_len = wpabuf_len(resp);
 398                 wpa_s->sme.sae.state = start ? SAE_COMMITTED : SAE_CONFIRMED;
 399         }
 400 #endif /* CONFIG_SAE */
 401
 402         wpa_supplicant_cancel_sched_scan(wpa_s);
 403         wpa_supplicant_cancel_scan(wpa_s);
 404
 405         wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
 406                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 407                 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
 408
 409         wpa_clear_keys(wpa_s, bss->bssid);
 410         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 411         old_ssid = wpa_s->current_ssid;
 412         wpa_s->current_ssid = ssid;
 413         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
 414         wpa_supplicant_initiate_eapol(wpa_s);
 415         if (old_ssid != wpa_s->current_ssid)
 416                 wpas_notify_network_changed(wpa_s);
 417
 418         wpa_s->sme.auth_alg = params.auth_alg;
 419         if (wpa_drv_authenticate(wpa_s, &params) < 0) {
 420                 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
 421                         "driver failed");
 422                 wpas_connection_failed(wpa_s, bss->bssid);
 423                 wpa_supplicant_mark_disassoc(wpa_s);
 424                 wpabuf_free(resp);
 425                 wpas_connect_work_done(wpa_s);
 426                 return;
 427         }
 428
 429         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 430                                NULL);
 431
 432         /*
 433          * Association will be started based on the authentication event from
 434          * the driver.
 435          */
 436
 437         wpabuf_free(resp);
 438 }
 439
 440
 441 static void sme_auth_start_cb(struct wpa_radio_work *work, int deinit)
 442 {
 443         struct wpa_connect_work *cwork = work->ctx;
 444         struct wpa_supplicant *wpa_s = work->wpa_s;
 445
 446         if (deinit) {
 447                 wpas_connect_work_free(cwork);
 448                 return;
 449         }
 450
 451         wpa_s->connect_work = work;
 452
 453         if (!wpas_valid_bss_ssid(wpa_s, cwork->bss, cwork->ssid)) {
 454                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: BSS/SSID entry for authentication not valid anymore - drop connection attempt");
 455                 wpas_connect_work_done(wpa_s);
 456                 return;
 457         }
 458
 459         sme_send_authentication(wpa_s, cwork->bss, cwork->ssid, 1);
 460 }
 461
 462
 463 void sme_authenticate(struct wpa_supplicant *wpa_s,
 464                       struct wpa_bss *bss, struct wpa_ssid *ssid)
 465 {
 466         struct wpa_connect_work *cwork;
 467
 468         if (bss == NULL || ssid == NULL)
 469                 return;
 470         if (wpa_s->connect_work) {
 471                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reject sme_authenticate() call since connect_work exist");
 472                 return;
 473         }
 474
 475         cwork = os_zalloc(sizeof(*cwork));
 476         if (cwork == NULL)
 477                 return;
 478         cwork->bss = bss;
 479         cwork->ssid = ssid;
 480         cwork->sme = 1;
 481
 482 #ifdef CONFIG_SAE
 483         wpa_s->sme.sae.state = SAE_NOTHING;
 484         wpa_s->sme.sae.send_confirm = 0;
 485         wpa_s->sme.sae_group_index = 0;
 486 #endif /* CONFIG_SAE */
 487
 488         if (radio_add_work(wpa_s, bss->freq, "sme-connect", 1,
 489                            sme_auth_start_cb, cwork) < 0)
 490                 wpas_connect_work_free(cwork);
 491 }
 492
 493
 494 #ifdef CONFIG_SAE
 495
 496 static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
 497                         u16 status_code, const u8 *data, size_t len)
 498 {
 499         wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
 500                 "status code %u", auth_transaction, status_code);
 501
 502         if (auth_transaction == 1 &&
 503             status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
 504             wpa_s->sme.sae.state == SAE_COMMITTED &&
 505             wpa_s->current_bss && wpa_s->current_ssid) {
 506                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE anti-clogging token "
 507                         "requested");
 508                 wpabuf_free(wpa_s->sme.sae_token);
 509                 wpa_s->sme.sae_token = wpabuf_alloc_copy(data, len);
 510                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 511                                         wpa_s->current_ssid, 1);
 512                 return 0;
 513         }
 514
 515         if (auth_transaction == 1 &&
 516             status_code == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED &&
 517             wpa_s->sme.sae.state == SAE_COMMITTED &&
 518             wpa_s->current_bss && wpa_s->current_ssid) {
 519                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE group not supported");
 520                 wpa_s->sme.sae_group_index++;
 521                 if (sme_set_sae_group(wpa_s) < 0)
 522                         return -1; /* no other groups enabled */
 523                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Try next enabled SAE group");
 524                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 525                                         wpa_s->current_ssid, 1);
 526                 return 0;
 527         }
 528
 529         if (status_code != WLAN_STATUS_SUCCESS)
 530                 return -1;
 531
 532         if (auth_transaction == 1) {
 533                 int *groups = wpa_s->conf->sae_groups;
 534
 535                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
 536                 if (wpa_s->current_bss == NULL ||
 537                     wpa_s->current_ssid == NULL)
 538                         return -1;
 539                 if (wpa_s->sme.sae.state != SAE_COMMITTED)
 540                         return -1;
 541                 if (groups && groups[0] <= 0)
 542                         groups = NULL;
 543                 if (sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL,
 544                                      groups) != WLAN_STATUS_SUCCESS)
 545                         return -1;
 546
 547                 if (sae_process_commit(&wpa_s->sme.sae) < 0) {
 548                         wpa_printf(MSG_DEBUG, "SAE: Failed to process peer "
 549                                    "commit");
 550                         return -1;
 551                 }
 552
 553                 wpabuf_free(wpa_s->sme.sae_token);
 554                 wpa_s->sme.sae_token = NULL;
 555                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 556                                         wpa_s->current_ssid, 0);
 557                 return 0;
 558         } else if (auth_transaction == 2) {
 559                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
 560                 if (wpa_s->sme.sae.state != SAE_CONFIRMED)
 561                         return -1;
 562                 if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0)
 563                         return -1;
 564                 wpa_s->sme.sae.state = SAE_ACCEPTED;
 565                 sae_clear_temp_data(&wpa_s->sme.sae);
 566                 return 1;
 567         }
 568
 569         return -1;
 570 }
 571 #endif /* CONFIG_SAE */
 572
 573
 574 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
 575 {
 576         struct wpa_ssid *ssid = wpa_s->current_ssid;
 577
 578         if (ssid == NULL) {
 579                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 580                         "when network is not selected");
 581                 return;
 582         }
 583
 584         if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
 585                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 586                         "when not in authenticating state");
 587                 return;
 588         }
 589
 590         if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
 591                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
 592                         "unexpected peer " MACSTR,
 593                         MAC2STR(data->auth.peer));
 594                 return;
 595         }
 596
 597         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
 598                 " auth_type=%d auth_transaction=%d status_code=%d",
 599                 MAC2STR(data->auth.peer), data->auth.auth_type,
 600                 data->auth.auth_transaction, data->auth.status_code);
 601         wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
 602                     data->auth.ies, data->auth.ies_len);
 603
 604         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 605
 606 #ifdef CONFIG_SAE
 607         if (data->auth.auth_type == WLAN_AUTH_SAE) {
 608                 int res;
 609                 res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
 610                                    data->auth.status_code, data->auth.ies,
 611                                    data->auth.ies_len);
 612                 if (res < 0) {
 613                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 614                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 615
 616                 }
 617                 if (res != 1)
 618                         return;
 619
 620                 wpa_printf(MSG_DEBUG, "SME: SAE completed - setting PMK for "
 621                            "4-way handshake");
 622                 wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN);
 623         }
 624 #endif /* CONFIG_SAE */
 625
 626         if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
 627                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
 628                         "code %d)", data->auth.status_code);
 629
 630                 if (data->auth.status_code !=
 631                     WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
 632                     wpa_s->sme.auth_alg == data->auth.auth_type ||
 633                     wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
 634                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 635                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 636                         return;
 637                 }
 638
 639                 wpas_connect_work_done(wpa_s);
 640
 641                 switch (data->auth.auth_type) {
 642                 case WLAN_AUTH_OPEN:
 643                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 644
 645                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
 646                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 647                                                  wpa_s->current_ssid);
 648                         return;
 649
 650                 case WLAN_AUTH_SHARED_KEY:
 651                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
 652
 653                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
 654                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 655                                                  wpa_s->current_ssid);
 656                         return;
 657
 658                 default:
 659                         return;
 660                 }
 661         }
 662
 663 #ifdef CONFIG_IEEE80211R
 664         if (data->auth.auth_type == WLAN_AUTH_FT) {
 665                 union wpa_event_data edata;
 666                 os_memset(&edata, 0, sizeof(edata));
 667                 edata.ft_ies.ies = data->auth.ies;
 668                 edata.ft_ies.ies_len = data->auth.ies_len;
 669                 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
 670                 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
 671         }
 672 #endif /* CONFIG_IEEE80211R */
 673
 674         sme_associate(wpa_s, ssid->mode, data->auth.peer,
 675                       data->auth.auth_type);
 676 }
 677
 678
 679 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
 680                    const u8 *bssid, u16 auth_type)
 681 {
 682         struct wpa_driver_associate_params params;
 683         struct ieee802_11_elems elems;
 684 #ifdef CONFIG_HT_OVERRIDES
 685         struct ieee80211_ht_capabilities htcaps;
 686         struct ieee80211_ht_capabilities htcaps_mask;
 687 #endif /* CONFIG_HT_OVERRIDES */
 688 #ifdef CONFIG_VHT_OVERRIDES
 689         struct ieee80211_vht_capabilities vhtcaps;
 690         struct ieee80211_vht_capabilities vhtcaps_mask;
 691 #endif /* CONFIG_VHT_OVERRIDES */
 692
 693         os_memset(&params, 0, sizeof(params));
 694         params.bssid = bssid;
 695         params.ssid = wpa_s->sme.ssid;
 696         params.ssid_len = wpa_s->sme.ssid_len;
 697         params.freq = wpa_s->sme.freq;
 698         params.bg_scan_period = wpa_s->current_ssid ?
 699                 wpa_s->current_ssid->bg_scan_period : -1;
 700         params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
 701                 wpa_s->sme.assoc_req_ie : NULL;
 702         params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
 703         params.pairwise_suite = wpa_s->pairwise_cipher;
 704         params.group_suite = wpa_s->group_cipher;
 705 #ifdef CONFIG_HT_OVERRIDES
 706         os_memset(&htcaps, 0, sizeof(htcaps));
 707         os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
 708         params.htcaps = (u8 *) &htcaps;
 709         params.htcaps_mask = (u8 *) &htcaps_mask;
 710         wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, &params);
 711 #endif /* CONFIG_HT_OVERRIDES */
 712 #ifdef CONFIG_VHT_OVERRIDES
 713         os_memset(&vhtcaps, 0, sizeof(vhtcaps));
 714         os_memset(&vhtcaps_mask, 0, sizeof(vhtcaps_mask));
 715         params.vhtcaps = &vhtcaps;
 716         params.vhtcaps_mask = &vhtcaps_mask;
 717         wpa_supplicant_apply_vht_overrides(wpa_s, wpa_s->current_ssid, &params);
 718 #endif /* CONFIG_VHT_OVERRIDES */
 719 #ifdef CONFIG_IEEE80211R
 720         if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
 721                 params.wpa_ie = wpa_s->sme.ft_ies;
 722                 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
 723         }
 724 #endif /* CONFIG_IEEE80211R */
 725         params.mode = mode;
 726         params.mgmt_frame_protection = wpa_s->sme.mfp;
 727         if (wpa_s->sme.prev_bssid_set)
 728                 params.prev_bssid = wpa_s->sme.prev_bssid;
 729
 730         wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
 731                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 732                 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
 733                 params.freq);
 734
 735         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
 736
 737         if (params.wpa_ie == NULL ||
 738             ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
 739             < 0) {
 740                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
 741                 os_memset(&elems, 0, sizeof(elems));
 742         }
 743         if (elems.rsn_ie) {
 744                 params.wpa_proto = WPA_PROTO_RSN;
 745                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
 746                                         elems.rsn_ie_len + 2);
 747         } else if (elems.wpa_ie) {
 748                 params.wpa_proto = WPA_PROTO_WPA;
 749                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
 750                                         elems.wpa_ie_len + 2);
 751         } else
 752                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 753         if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
 754                 params.p2p = 1;
 755
 756         if (wpa_s->parent->set_sta_uapsd)
 757                 params.uapsd = wpa_s->parent->sta_uapsd;
 758         else
 759                 params.uapsd = -1;
 760
 761         if (wpa_drv_associate(wpa_s, &params) < 0) {
 762                 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
 763                         "driver failed");
 764                 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 765                 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 766                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 767                 return;
 768         }
 769
 770         eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
 771                                NULL);
 772 }
 773
 774
 775 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
 776                       const u8 *ies, size_t ies_len)
 777 {
 778         if (md == NULL || ies == NULL) {
 779                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
 780                 os_free(wpa_s->sme.ft_ies);
 781                 wpa_s->sme.ft_ies = NULL;
 782                 wpa_s->sme.ft_ies_len = 0;
 783                 wpa_s->sme.ft_used = 0;
 784                 return 0;
 785         }
 786
 787         os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
 788         wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
 789         os_free(wpa_s->sme.ft_ies);
 790         wpa_s->sme.ft_ies = os_malloc(ies_len);
 791         if (wpa_s->sme.ft_ies == NULL)
 792                 return -1;
 793         os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
 794         wpa_s->sme.ft_ies_len = ies_len;
 795         return 0;
 796 }
 797
 798
 799 static void sme_deauth(struct wpa_supplicant *wpa_s)
 800 {
 801         int bssid_changed;
 802
 803         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 804
 805         if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
 806                                    WLAN_REASON_DEAUTH_LEAVING) < 0) {
 807                 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
 808                         "failed");
 809         }
 810         wpa_s->sme.prev_bssid_set = 0;
 811
 812         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 813         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 814         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 815         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 816         if (bssid_changed)
 817                 wpas_notify_bssid_changed(wpa_s);
 818 }
 819
 820
 821 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
 822                             union wpa_event_data *data)
 823 {
 824         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
 825                 "status code %d", MAC2STR(wpa_s->pending_bssid),
 826                 data->assoc_reject.status_code);
 827
 828         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 829
 830         /*
 831          * For now, unconditionally terminate the previous authentication. In
 832          * theory, this should not be needed, but mac80211 gets quite confused
 833          * if the authentication is left pending.. Some roaming cases might
 834          * benefit from using the previous authentication, so this could be
 835          * optimized in the future.
 836          */
 837         sme_deauth(wpa_s);
 838 }
 839
 840
 841 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
 842                               union wpa_event_data *data)
 843 {
 844         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
 845         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 846         wpa_supplicant_mark_disassoc(wpa_s);
 847 }
 848
 849
 850 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
 851                                union wpa_event_data *data)
 852 {
 853         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
 854         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 855         wpa_supplicant_mark_disassoc(wpa_s);
 856 }
 857
 858
 859 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
 860                         struct disassoc_info *info)
 861 {
 862         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
 863         if (wpa_s->sme.prev_bssid_set) {
 864                 /*
 865                  * cfg80211/mac80211 can get into somewhat confused state if
 866                  * the AP only disassociates us and leaves us in authenticated
 867                  * state. For now, force the state to be cleared to avoid
 868                  * confusing errors if we try to associate with the AP again.
 869                  */
 870                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
 871                         "driver state");
 872                 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
 873                                        WLAN_REASON_DEAUTH_LEAVING);
 874         }
 875 }
 876
 877
 878 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
 879 {
 880         struct wpa_supplicant *wpa_s = eloop_ctx;
 881         if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
 882                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
 883                 sme_deauth(wpa_s);
 884         }
 885 }
 886
 887
 888 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
 889 {
 890         struct wpa_supplicant *wpa_s = eloop_ctx;
 891         if (wpa_s->wpa_state == WPA_ASSOCIATING) {
 892                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
 893                 sme_deauth(wpa_s);
 894         }
 895 }
 896
 897
 898 void sme_state_changed(struct wpa_supplicant *wpa_s)
 899 {
 900         /* Make sure timers are cleaned up appropriately. */
 901         if (wpa_s->wpa_state != WPA_ASSOCIATING)
 902                 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 903         if (wpa_s->wpa_state != WPA_AUTHENTICATING)
 904                 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 905 }
 906
 907
 908 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
 909                                        const u8 *prev_pending_bssid)
 910 {
 911         /*
 912          * mac80211-workaround to force deauth on failed auth cmd,
 913          * requires us to remain in authenticating state to allow the
 914          * second authentication attempt to be continued properly.
 915          */
 916         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
 917                 "to proceed after disconnection event");
 918         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 919         os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
 920
 921         /*
 922          * Re-arm authentication timer in case auth fails for whatever reason.
 923          */
 924         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 925         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 926                                NULL);
 927 }
 928
 929
 930 void sme_deinit(struct wpa_supplicant *wpa_s)
 931 {
 932         os_free(wpa_s->sme.ft_ies);
 933         wpa_s->sme.ft_ies = NULL;
 934         wpa_s->sme.ft_ies_len = 0;
 935 #ifdef CONFIG_IEEE80211W
 936         sme_stop_sa_query(wpa_s);
 937 #endif /* CONFIG_IEEE80211W */
 938 #ifdef CONFIG_SAE
 939         wpabuf_free(wpa_s->sme.sae_token);
 940         wpa_s->sme.sae_token = NULL;
 941         sae_clear_data(&wpa_s->sme.sae);
 942 #endif /* CONFIG_SAE */
 943
 944         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 945         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 946         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
 947 }
 948
 949
 950 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
 951                                    const u8 *chan_list, u8 num_channels,
 952                                    u8 num_intol)
 953 {
 954         struct ieee80211_2040_bss_coex_ie *bc_ie;
 955         struct ieee80211_2040_intol_chan_report *ic_report;
 956         struct wpabuf *buf;
 957
 958         wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR,
 959                    MAC2STR(wpa_s->bssid));
 960
 961         buf = wpabuf_alloc(2 + /* action.category + action_code */
 962                            sizeof(struct ieee80211_2040_bss_coex_ie) +
 963                            sizeof(struct ieee80211_2040_intol_chan_report) +
 964                            num_channels);
 965         if (buf == NULL)
 966                 return;
 967
 968         wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
 969         wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
 970
 971         bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
 972         bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
 973         bc_ie->length = 1;
 974         if (num_intol)
 975                 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
 976
 977         if (num_channels > 0) {
 978                 ic_report = wpabuf_put(buf, sizeof(*ic_report));
 979                 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
 980                 ic_report->length = num_channels + 1;
 981                 ic_report->op_class = 0;
 982                 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
 983                           num_channels);
 984         }
 985
 986         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
 987                                 wpa_s->own_addr, wpa_s->bssid,
 988                                 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
 989                 wpa_msg(wpa_s, MSG_INFO,
 990                         "SME: Failed to send 20/40 BSS Coexistence frame");
 991         }
 992
 993         wpabuf_free(buf);
 994 }
 995
 996
 997 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
 998 {
 999         struct wpa_bss *bss;
1000         const u8 *ie;
1001         u16 ht_cap;
1002         u8 chan_list[P2P_MAX_CHANNELS], channel;
1003         u8 num_channels = 0, num_intol = 0, i;
1004
1005         if (!wpa_s->sme.sched_obss_scan)
1006                 return 0;
1007
1008         wpa_s->sme.sched_obss_scan = 0;
1009         if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
1010                 return 1;
1011
1012         /*
1013          * Check whether AP uses regulatory triplet or channel triplet in
1014          * country info. Right now the operating class of the BSS channel
1015          * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
1016          * based on the assumption that operating class triplet is not used in
1017          * beacon frame. If the First Channel Number/Operating Extension
1018          * Identifier octet has a positive integer value of 201 or greater,
1019          * then its operating class triplet.
1020          *
1021          * TODO: If Supported Operating Classes element is present in beacon
1022          * frame, have to lookup operating class in Annex E and fill them in
1023          * 2040 coex frame.
1024          */
1025         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
1026         if (ie && (ie[1] >= 6) && (ie[5] >= 201))
1027                 return 1;
1028
1029         os_memset(chan_list, 0, sizeof(chan_list));
1030
1031         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1032                 /* Skip other band bss */
1033                 enum hostapd_hw_mode mode;
1034                 mode = ieee80211_freq_to_chan(bss->freq, &channel);
1035                 if (mode != HOSTAPD_MODE_IEEE80211G &&
1036                     mode != HOSTAPD_MODE_IEEE80211B)
1037                         continue;
1038
1039                 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
1040                 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
1041
1042                 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
1043                         /* Check whether the channel is already considered */
1044                         for (i = 0; i < num_channels; i++) {
1045                                 if (channel == chan_list[i])
1046                                         break;
1047                         }
1048                         if (i != num_channels)
1049                                 continue;
1050
1051                         if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
1052                                 num_intol++;
1053
1054                         chan_list[num_channels++] = channel;
1055                 }
1056         }
1057
1058         sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
1059         return 1;
1060 }
1061
1062
1063 static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
1064                                           u16 num_modes,
1065                                           enum hostapd_hw_mode mode)
1066 {
1067         u16 i;
1068
1069         for (i = 0; i < num_modes; i++) {
1070                 if (modes[i].mode == mode)
1071                         return &modes[i];
1072         }
1073
1074         return NULL;
1075 }
1076
1077
1078 static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s,
1079                                         enum hostapd_hw_mode band,
1080                                         struct wpa_driver_scan_params *params)
1081 {
1082         /* Include only supported channels for the specified band */
1083         struct hostapd_hw_modes *mode;
1084         int count, i;
1085
1086         mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band);
1087         if (mode == NULL) {
1088                 /* No channels supported in this band - use empty list */
1089                 params->freqs = os_zalloc(sizeof(int));
1090                 return;
1091         }
1092
1093         params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
1094         if (params->freqs == NULL)
1095                 return;
1096         for (count = 0, i = 0; i < mode->num_channels; i++) {
1097                 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
1098                         continue;
1099                 params->freqs[count++] = mode->channels[i].freq;
1100         }
1101 }
1102
1103
1104 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1105 {
1106         struct wpa_supplicant *wpa_s = eloop_ctx;
1107         struct wpa_driver_scan_params params;
1108
1109         if (!wpa_s->current_bss) {
1110                 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
1111                 return;
1112         }
1113
1114         os_memset(&params, 0, sizeof(params));
1115         wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G, &params);
1116         wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
1117
1118         if (wpa_supplicant_trigger_scan(wpa_s, &params))
1119                 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
1120         else
1121                 wpa_s->sme.sched_obss_scan = 1;
1122         os_free(params.freqs);
1123
1124         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1125                                sme_obss_scan_timeout, wpa_s, NULL);
1126 }
1127
1128
1129 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
1130 {
1131         const u8 *ie;
1132         struct wpa_bss *bss = wpa_s->current_bss;
1133         struct wpa_ssid *ssid = wpa_s->current_ssid;
1134         struct hostapd_hw_modes *hw_mode = NULL;
1135         int i;
1136
1137         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1138         wpa_s->sme.sched_obss_scan = 0;
1139         if (!enable)
1140                 return;
1141
1142         /*
1143          * Schedule OBSS scan if driver is using station SME in wpa_supplicant
1144          * or it expects OBSS scan to be performed by wpa_supplicant.
1145          */
1146         if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
1147               (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
1148             ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
1149                 return;
1150
1151         if (!wpa_s->hw.modes)
1152                 return;
1153
1154         /* only HT caps in 11g mode are relevant */
1155         for (i = 0; i < wpa_s->hw.num_modes; i++) {
1156                 hw_mode = &wpa_s->hw.modes[i];
1157                 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
1158                         break;
1159         }
1160
1161         /* Driver does not support HT40 for 11g or doesn't have 11g. */
1162         if (i == wpa_s->hw.num_modes || !hw_mode ||
1163             !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1164                 return;
1165
1166         if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
1167                 return; /* Not associated on 2.4 GHz band */
1168
1169         /* Check whether AP supports HT40 */
1170         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
1171         if (!ie || ie[1] < 2 ||
1172             !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1173                 return; /* AP does not support HT40 */
1174
1175         ie = wpa_bss_get_ie(wpa_s->current_bss,
1176                             WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
1177         if (!ie || ie[1] < 14)
1178                 return; /* AP does not request OBSS scans */
1179
1180         wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
1181         if (wpa_s->sme.obss_scan_int < 10) {
1182                 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
1183                            "replaced with the minimum 10 sec",
1184                            wpa_s->sme.obss_scan_int);
1185                 wpa_s->sme.obss_scan_int = 10;
1186         }
1187         wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
1188                    wpa_s->sme.obss_scan_int);
1189         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1190                                sme_obss_scan_timeout, wpa_s, NULL);
1191 }
1192
1193
1194 #ifdef CONFIG_IEEE80211W
1195
1196 static const unsigned int sa_query_max_timeout = 1000;
1197 static const unsigned int sa_query_retry_timeout = 201;
1198
1199 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
1200 {
1201         u32 tu;
1202         struct os_reltime now, passed;
1203         os_get_reltime(&now);
1204         os_reltime_sub(&now, &wpa_s->sme.sa_query_start, &passed);
1205         tu = (passed.sec * 1000000 + passed.usec) / 1024;
1206         if (sa_query_max_timeout < tu) {
1207                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
1208                 sme_stop_sa_query(wpa_s);
1209                 wpa_supplicant_deauthenticate(
1210                         wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
1211                 return 1;
1212         }
1213
1214         return 0;
1215 }
1216
1217
1218 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
1219                                   const u8 *trans_id)
1220 {
1221         u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
1222         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
1223                 MACSTR, MAC2STR(wpa_s->bssid));
1224         wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
1225                     trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1226         req[0] = WLAN_ACTION_SA_QUERY;
1227         req[1] = WLAN_SA_QUERY_REQUEST;
1228         os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1229         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1230                                 wpa_s->own_addr, wpa_s->bssid,
1231                                 req, sizeof(req), 0) < 0)
1232                 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
1233                         "Request");
1234 }
1235
1236
1237 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
1238 {
1239         struct wpa_supplicant *wpa_s = eloop_ctx;
1240         unsigned int timeout, sec, usec;
1241         u8 *trans_id, *nbuf;
1242
1243         if (wpa_s->sme.sa_query_count > 0 &&
1244             sme_check_sa_query_timeout(wpa_s))
1245                 return;
1246
1247         nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
1248                                 wpa_s->sme.sa_query_count + 1,
1249                                 WLAN_SA_QUERY_TR_ID_LEN);
1250         if (nbuf == NULL)
1251                 return;
1252         if (wpa_s->sme.sa_query_count == 0) {
1253                 /* Starting a new SA Query procedure */
1254                 os_get_reltime(&wpa_s->sme.sa_query_start);
1255         }
1256         trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
1257         wpa_s->sme.sa_query_trans_id = nbuf;
1258         wpa_s->sme.sa_query_count++;
1259
1260         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1261
1262         timeout = sa_query_retry_timeout;
1263         sec = ((timeout / 1000) * 1024) / 1000;
1264         usec = (timeout % 1000) * 1024;
1265         eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
1266
1267         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
1268                 wpa_s->sme.sa_query_count);
1269
1270         sme_send_sa_query_req(wpa_s, trans_id);
1271 }
1272
1273
1274 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
1275 {
1276         sme_sa_query_timer(wpa_s, NULL);
1277 }
1278
1279
1280 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
1281 {
1282         eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
1283         os_free(wpa_s->sme.sa_query_trans_id);
1284         wpa_s->sme.sa_query_trans_id = NULL;
1285         wpa_s->sme.sa_query_count = 0;
1286 }
1287
1288
1289 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1290                                  const u8 *da, u16 reason_code)
1291 {
1292         struct wpa_ssid *ssid;
1293
1294         if (wpa_s->wpa_state != WPA_COMPLETED)
1295                 return;
1296         ssid = wpa_s->current_ssid;
1297         if (ssid == NULL ||
1298             (ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
1299              wpa_s->conf->pmf : ssid->ieee80211w) == NO_MGMT_FRAME_PROTECTION)
1300                 return;
1301         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1302                 return;
1303         if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1304             reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1305                 return;
1306         if (wpa_s->sme.sa_query_count > 0)
1307                 return;
1308
1309         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1310                 "possible AP/STA state mismatch - trigger SA Query");
1311         sme_start_sa_query(wpa_s);
1312 }
1313
1314
1315 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1316                      const u8 *data, size_t len)
1317 {
1318         int i;
1319
1320         if (wpa_s->sme.sa_query_trans_id == NULL ||
1321             len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1322             data[0] != WLAN_SA_QUERY_RESPONSE)
1323                 return;
1324         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1325                 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1326
1327         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1328                 return;
1329
1330         for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1331                 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1332                               i * WLAN_SA_QUERY_TR_ID_LEN,
1333                               data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1334                         break;
1335         }
1336
1337         if (i >= wpa_s->sme.sa_query_count) {
1338                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1339                         "transaction identifier found");
1340                 return;
1341         }
1342
1343         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1344                 "from " MACSTR, MAC2STR(sa));
1345         sme_stop_sa_query(wpa_s);
1346 }
1347
1348 #endif /* CONFIG_IEEE80211W */