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 /**
 141  * sme_auth_handle_rrm - Handle RRM aspects of current authentication attempt
 142  * @wpa_s: Pointer to wpa_supplicant data
 143  * @bss: Pointer to the bss which is the target of authentication attempt
 144  */
 145 static void sme_auth_handle_rrm(struct wpa_supplicant *wpa_s,
 146                                 struct wpa_bss *bss)
 147 {
 148         const u8 rrm_ie_len = 5;
 149         u8 *pos;
 150         const u8 *rrm_ie;
 151
 152         wpa_s->rrm.rrm_used = 0;
 153
 154         wpa_printf(MSG_DEBUG,
 155                    "RRM: Determining whether RRM can be used - device support: 0x%x",
 156                    wpa_s->drv_rrm_flags);
 157
 158         rrm_ie = wpa_bss_get_ie(bss, WLAN_EID_RRM_ENABLED_CAPABILITIES);
 159         if (!rrm_ie || !(bss->caps & IEEE80211_CAP_RRM)) {
 160                 wpa_printf(MSG_DEBUG, "RRM: No RRM in network");
 161                 return;
 162         }
 163
 164         if (!(wpa_s->drv_rrm_flags &
 165               WPA_DRIVER_FLAGS_DS_PARAM_SET_IE_IN_PROBES) ||
 166             !(wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_QUIET)) {
 167                 wpa_printf(MSG_DEBUG,
 168                            "RRM: Insufficient RRM support in driver - do not use RRM");
 169                 return;
 170         }
 171
 172         if (sizeof(wpa_s->sme.assoc_req_ie) <
 173             wpa_s->sme.assoc_req_ie_len + rrm_ie_len + 2) {
 174                 wpa_printf(MSG_INFO,
 175                            "RRM: Unable to use RRM, no room for RRM IE");
 176                 return;
 177         }
 178
 179         wpa_printf(MSG_DEBUG, "RRM: Adding RRM IE to Association Request");
 180         pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
 181         os_memset(pos, 0, 2 + rrm_ie_len);
 182         *pos++ = WLAN_EID_RRM_ENABLED_CAPABILITIES;
 183         *pos++ = rrm_ie_len;
 184
 185         /* Set supported capabilites flags */
 186         if (wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_TX_POWER_INSERTION)
 187                 *pos |= WLAN_RRM_CAPS_LINK_MEASUREMENT;
 188
 189         wpa_s->sme.assoc_req_ie_len += rrm_ie_len + 2;
 190         wpa_s->rrm.rrm_used = 1;
 191 }
 192
 193
 194 static void sme_send_authentication(struct wpa_supplicant *wpa_s,
 195                                     struct wpa_bss *bss, struct wpa_ssid *ssid,
 196                                     int start)
 197 {
 198         struct wpa_driver_auth_params params;
 199         struct wpa_ssid *old_ssid;
 200 #ifdef CONFIG_IEEE80211R
 201         const u8 *ie;
 202 #endif /* CONFIG_IEEE80211R */
 203 #ifdef CONFIG_IEEE80211R
 204         const u8 *md = NULL;
 205 #endif /* CONFIG_IEEE80211R */
 206         int i, bssid_changed;
 207         struct wpabuf *resp = NULL;
 208         u8 ext_capab[18];
 209         int ext_capab_len;
 210
 211         if (bss == NULL) {
 212                 wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for "
 213                         "the network");
 214                 wpas_connect_work_done(wpa_s);
 215                 return;
 216         }
 217
 218         wpa_s->current_bss = bss;
 219
 220         os_memset(&params, 0, sizeof(params));
 221         wpa_s->reassociate = 0;
 222
 223         params.freq = bss->freq;
 224         params.bssid = bss->bssid;
 225         params.ssid = bss->ssid;
 226         params.ssid_len = bss->ssid_len;
 227         params.p2p = ssid->p2p_group;
 228
 229         if (wpa_s->sme.ssid_len != params.ssid_len ||
 230             os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
 231                 wpa_s->sme.prev_bssid_set = 0;
 232
 233         wpa_s->sme.freq = params.freq;
 234         os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
 235         wpa_s->sme.ssid_len = params.ssid_len;
 236
 237         params.auth_alg = WPA_AUTH_ALG_OPEN;
 238 #ifdef IEEE8021X_EAPOL
 239         if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
 240                 if (ssid->leap) {
 241                         if (ssid->non_leap == 0)
 242                                 params.auth_alg = WPA_AUTH_ALG_LEAP;
 243                         else
 244                                 params.auth_alg |= WPA_AUTH_ALG_LEAP;
 245                 }
 246         }
 247 #endif /* IEEE8021X_EAPOL */
 248         wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
 249                 params.auth_alg);
 250         if (ssid->auth_alg) {
 251                 params.auth_alg = ssid->auth_alg;
 252                 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
 253                         "0x%x", params.auth_alg);
 254         }
 255 #ifdef CONFIG_SAE
 256         wpa_s->sme.sae_pmksa_caching = 0;
 257         if (wpa_key_mgmt_sae(ssid->key_mgmt)) {
 258                 const u8 *rsn;
 259                 struct wpa_ie_data ied;
 260
 261                 rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 262                 if (rsn &&
 263                     wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0) {
 264                         if (wpa_key_mgmt_sae(ied.key_mgmt)) {
 265                                 wpa_dbg(wpa_s, MSG_DEBUG, "Using SAE auth_alg");
 266                                 params.auth_alg = WPA_AUTH_ALG_SAE;
 267                         }
 268                 }
 269         }
 270 #endif /* CONFIG_SAE */
 271
 272         for (i = 0; i < NUM_WEP_KEYS; i++) {
 273                 if (ssid->wep_key_len[i])
 274                         params.wep_key[i] = ssid->wep_key[i];
 275                 params.wep_key_len[i] = ssid->wep_key_len[i];
 276         }
 277         params.wep_tx_keyidx = ssid->wep_tx_keyidx;
 278
 279         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 280         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 281         os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
 282         if (bssid_changed)
 283                 wpas_notify_bssid_changed(wpa_s);
 284
 285         if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
 286              wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
 287             wpa_key_mgmt_wpa(ssid->key_mgmt)) {
 288                 int try_opportunistic;
 289                 try_opportunistic = (ssid->proactive_key_caching < 0 ?
 290                                      wpa_s->conf->okc :
 291                                      ssid->proactive_key_caching) &&
 292                         (ssid->proto & WPA_PROTO_RSN);
 293                 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
 294                                             wpa_s->current_ssid,
 295                                             try_opportunistic) == 0)
 296                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
 297                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 298                 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
 299                                               wpa_s->sme.assoc_req_ie,
 300                                               &wpa_s->sme.assoc_req_ie_len)) {
 301                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 302                                 "key management and encryption suites");
 303                         wpas_connect_work_done(wpa_s);
 304                         return;
 305                 }
 306         } else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
 307                    wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) {
 308                 /*
 309                  * Both WPA and non-WPA IEEE 802.1X enabled in configuration -
 310                  * use non-WPA since the scan results did not indicate that the
 311                  * AP is using WPA or WPA2.
 312                  */
 313                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 314                 wpa_s->sme.assoc_req_ie_len = 0;
 315         } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
 316                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 317                 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
 318                                               wpa_s->sme.assoc_req_ie,
 319                                               &wpa_s->sme.assoc_req_ie_len)) {
 320                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 321                                 "key management and encryption suites (no "
 322                                 "scan results)");
 323                         wpas_connect_work_done(wpa_s);
 324                         return;
 325                 }
 326 #ifdef CONFIG_WPS
 327         } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 328                 struct wpabuf *wps_ie;
 329                 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
 330                 if (wps_ie && wpabuf_len(wps_ie) <=
 331                     sizeof(wpa_s->sme.assoc_req_ie)) {
 332                         wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
 333                         os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
 334                                   wpa_s->sme.assoc_req_ie_len);
 335                 } else
 336                         wpa_s->sme.assoc_req_ie_len = 0;
 337                 wpabuf_free(wps_ie);
 338                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 339 #endif /* CONFIG_WPS */
 340         } else {
 341                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 342                 wpa_s->sme.assoc_req_ie_len = 0;
 343         }
 344
 345 #ifdef CONFIG_IEEE80211R
 346         ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
 347         if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
 348                 md = ie + 2;
 349         wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
 350         if (md) {
 351                 /* Prepare for the next transition */
 352                 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
 353         }
 354
 355         if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) {
 356                 if (wpa_s->sme.assoc_req_ie_len + 5 <
 357                     sizeof(wpa_s->sme.assoc_req_ie)) {
 358                         struct rsn_mdie *mdie;
 359                         u8 *pos = wpa_s->sme.assoc_req_ie +
 360                                 wpa_s->sme.assoc_req_ie_len;
 361                         *pos++ = WLAN_EID_MOBILITY_DOMAIN;
 362                         *pos++ = sizeof(*mdie);
 363                         mdie = (struct rsn_mdie *) pos;
 364                         os_memcpy(mdie->mobility_domain, md,
 365                                   MOBILITY_DOMAIN_ID_LEN);
 366                         mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
 367                         wpa_s->sme.assoc_req_ie_len += 5;
 368                 }
 369
 370                 if (wpa_s->sme.ft_used &&
 371                     os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
 372                     wpa_sm_has_ptk(wpa_s->wpa)) {
 373                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT "
 374                                 "over-the-air");
 375                         params.auth_alg = WPA_AUTH_ALG_FT;
 376                         params.ie = wpa_s->sme.ft_ies;
 377                         params.ie_len = wpa_s->sme.ft_ies_len;
 378                 }
 379         }
 380 #endif /* CONFIG_IEEE80211R */
 381
 382 #ifdef CONFIG_IEEE80211W
 383         wpa_s->sme.mfp = ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
 384                 wpa_s->conf->pmf : ssid->ieee80211w;
 385         if (wpa_s->sme.mfp != NO_MGMT_FRAME_PROTECTION) {
 386                 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 387                 struct wpa_ie_data _ie;
 388                 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
 389                     _ie.capabilities &
 390                     (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
 391                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
 392                                 "MFP: require MFP");
 393                         wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
 394                 }
 395         }
 396 #endif /* CONFIG_IEEE80211W */
 397
 398 #ifdef CONFIG_P2P
 399         if (wpa_s->global->p2p) {
 400                 u8 *pos;
 401                 size_t len;
 402                 int res;
 403                 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
 404                 len = sizeof(wpa_s->sme.assoc_req_ie) -
 405                         wpa_s->sme.assoc_req_ie_len;
 406                 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
 407                                             ssid->p2p_group);
 408                 if (res >= 0)
 409                         wpa_s->sme.assoc_req_ie_len += res;
 410         }
 411 #endif /* CONFIG_P2P */
 412
 413 #ifdef CONFIG_HS20
 414         if (is_hs20_network(wpa_s, ssid, bss)) {
 415                 struct wpabuf *hs20;
 416                 hs20 = wpabuf_alloc(20);
 417                 if (hs20) {
 418                         int pps_mo_id = hs20_get_pps_mo_id(wpa_s, ssid);
 419                         size_t len;
 420
 421                         wpas_hs20_add_indication(hs20, pps_mo_id);
 422                         len = sizeof(wpa_s->sme.assoc_req_ie) -
 423                                 wpa_s->sme.assoc_req_ie_len;
 424                         if (wpabuf_len(hs20) <= len) {
 425                                 os_memcpy(wpa_s->sme.assoc_req_ie +
 426                                           wpa_s->sme.assoc_req_ie_len,
 427                                           wpabuf_head(hs20), wpabuf_len(hs20));
 428                                 wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
 429                         }
 430                         wpabuf_free(hs20);
 431                 }
 432         }
 433 #endif /* CONFIG_HS20 */
 434
 435         ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab,
 436                                              sizeof(ext_capab));
 437         if (ext_capab_len > 0) {
 438                 u8 *pos = wpa_s->sme.assoc_req_ie;
 439                 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
 440                         pos += 2 + pos[1];
 441                 os_memmove(pos + ext_capab_len, pos,
 442                            wpa_s->sme.assoc_req_ie_len -
 443                            (pos - wpa_s->sme.assoc_req_ie));
 444                 wpa_s->sme.assoc_req_ie_len += ext_capab_len;
 445                 os_memcpy(pos, ext_capab, ext_capab_len);
 446         }
 447
 448         sme_auth_handle_rrm(wpa_s, bss);
 449
 450 #ifdef CONFIG_SAE
 451         if (params.auth_alg == WPA_AUTH_ALG_SAE &&
 452             pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid, ssid, 0) == 0)
 453         {
 454                 wpa_dbg(wpa_s, MSG_DEBUG,
 455                         "PMKSA cache entry found - try to use PMKSA caching instead of new SAE authentication");
 456                 params.auth_alg = WPA_AUTH_ALG_OPEN;
 457                 wpa_s->sme.sae_pmksa_caching = 1;
 458         }
 459
 460         if (params.auth_alg == WPA_AUTH_ALG_SAE) {
 461                 if (start)
 462                         resp = sme_auth_build_sae_commit(wpa_s, ssid,
 463                                                          bss->bssid);
 464                 else
 465                         resp = sme_auth_build_sae_confirm(wpa_s);
 466                 if (resp == NULL) {
 467                         wpas_connection_failed(wpa_s, bss->bssid);
 468                         return;
 469                 }
 470                 params.sae_data = wpabuf_head(resp);
 471                 params.sae_data_len = wpabuf_len(resp);
 472                 wpa_s->sme.sae.state = start ? SAE_COMMITTED : SAE_CONFIRMED;
 473         }
 474 #endif /* CONFIG_SAE */
 475
 476         wpa_supplicant_cancel_sched_scan(wpa_s);
 477         wpa_supplicant_cancel_scan(wpa_s);
 478
 479         wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
 480                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 481                 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
 482
 483         wpa_clear_keys(wpa_s, bss->bssid);
 484         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 485         old_ssid = wpa_s->current_ssid;
 486         wpa_s->current_ssid = ssid;
 487         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
 488         wpa_supplicant_initiate_eapol(wpa_s);
 489         if (old_ssid != wpa_s->current_ssid)
 490                 wpas_notify_network_changed(wpa_s);
 491
 492 #ifdef CONFIG_P2P
 493         /*
 494          * If multi-channel concurrency is not supported, check for any
 495          * frequency conflict. In case of any frequency conflict, remove the
 496          * least prioritized connection.
 497          */
 498         if (wpa_s->num_multichan_concurrent < 2) {
 499                 int freq, num;
 500                 num = get_shared_radio_freqs(wpa_s, &freq, 1);
 501                 if (num > 0 && freq > 0 && freq != params.freq) {
 502                         wpa_printf(MSG_DEBUG,
 503                                    "Conflicting frequency found (%d != %d)",
 504                                    freq, params.freq);
 505                         if (wpas_p2p_handle_frequency_conflicts(wpa_s,
 506                                                                 params.freq,
 507                                                                 ssid) < 0) {
 508                                 wpas_connection_failed(wpa_s, bss->bssid);
 509                                 wpa_supplicant_mark_disassoc(wpa_s);
 510                                 wpabuf_free(resp);
 511                                 wpas_connect_work_done(wpa_s);
 512                                 return;
 513                         }
 514                 }
 515         }
 516 #endif /* CONFIG_P2P */
 517
 518         wpa_s->sme.auth_alg = params.auth_alg;
 519         if (wpa_drv_authenticate(wpa_s, &params) < 0) {
 520                 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
 521                         "driver failed");
 522                 wpas_connection_failed(wpa_s, bss->bssid);
 523                 wpa_supplicant_mark_disassoc(wpa_s);
 524                 wpabuf_free(resp);
 525                 wpas_connect_work_done(wpa_s);
 526                 return;
 527         }
 528
 529         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 530                                NULL);
 531
 532         /*
 533          * Association will be started based on the authentication event from
 534          * the driver.
 535          */
 536
 537         wpabuf_free(resp);
 538 }
 539
 540
 541 static void sme_auth_start_cb(struct wpa_radio_work *work, int deinit)
 542 {
 543         struct wpa_connect_work *cwork = work->ctx;
 544         struct wpa_supplicant *wpa_s = work->wpa_s;
 545
 546         if (deinit) {
 547                 if (work->started)
 548                         wpa_s->connect_work = NULL;
 549
 550                 wpas_connect_work_free(cwork);
 551                 return;
 552         }
 553
 554         wpa_s->connect_work = work;
 555
 556         if (cwork->bss_removed ||
 557             !wpas_valid_bss_ssid(wpa_s, cwork->bss, cwork->ssid)) {
 558                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: BSS/SSID entry for authentication not valid anymore - drop connection attempt");
 559                 wpas_connect_work_done(wpa_s);
 560                 return;
 561         }
 562
 563         sme_send_authentication(wpa_s, cwork->bss, cwork->ssid, 1);
 564 }
 565
 566
 567 void sme_authenticate(struct wpa_supplicant *wpa_s,
 568                       struct wpa_bss *bss, struct wpa_ssid *ssid)
 569 {
 570         struct wpa_connect_work *cwork;
 571
 572         if (bss == NULL || ssid == NULL)
 573                 return;
 574         if (wpa_s->connect_work) {
 575                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reject sme_authenticate() call since connect_work exist");
 576                 return;
 577         }
 578
 579         if (radio_work_pending(wpa_s, "sme-connect")) {
 580                 /*
 581                  * The previous sme-connect work might no longer be valid due to
 582                  * the fact that the BSS list was updated. In addition, it makes
 583                  * sense to adhere to the 'newer' decision.
 584                  */
 585                 wpa_dbg(wpa_s, MSG_DEBUG,
 586                         "SME: Remove previous pending sme-connect");
 587                 radio_remove_works(wpa_s, "sme-connect", 0);
 588         }
 589
 590         cwork = os_zalloc(sizeof(*cwork));
 591         if (cwork == NULL)
 592                 return;
 593         cwork->bss = bss;
 594         cwork->ssid = ssid;
 595         cwork->sme = 1;
 596
 597 #ifdef CONFIG_SAE
 598         wpa_s->sme.sae.state = SAE_NOTHING;
 599         wpa_s->sme.sae.send_confirm = 0;
 600         wpa_s->sme.sae_group_index = 0;
 601 #endif /* CONFIG_SAE */
 602
 603         if (radio_add_work(wpa_s, bss->freq, "sme-connect", 1,
 604                            sme_auth_start_cb, cwork) < 0)
 605                 wpas_connect_work_free(cwork);
 606 }
 607
 608
 609 #ifdef CONFIG_SAE
 610
 611 static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
 612                         u16 status_code, const u8 *data, size_t len)
 613 {
 614         int *groups;
 615
 616         wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
 617                 "status code %u", auth_transaction, status_code);
 618
 619         if (auth_transaction == 1 &&
 620             status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
 621             wpa_s->sme.sae.state == SAE_COMMITTED &&
 622             wpa_s->current_bss && wpa_s->current_ssid) {
 623                 int default_groups[] = { 19, 20, 21, 25, 26, 0 };
 624                 u16 group;
 625
 626                 groups = wpa_s->conf->sae_groups;
 627                 if (!groups || groups[0] <= 0)
 628                         groups = default_groups;
 629
 630                 if (len < sizeof(le16)) {
 631                         wpa_dbg(wpa_s, MSG_DEBUG,
 632                                 "SME: Too short SAE anti-clogging token request");
 633                         return -1;
 634                 }
 635                 group = WPA_GET_LE16(data);
 636                 wpa_dbg(wpa_s, MSG_DEBUG,
 637                         "SME: SAE anti-clogging token requested (group %u)",
 638                         group);
 639                 if (sae_group_allowed(&wpa_s->sme.sae, groups, group) !=
 640                     WLAN_STATUS_SUCCESS) {
 641                         wpa_dbg(wpa_s, MSG_ERROR,
 642                                 "SME: SAE group %u of anti-clogging request is invalid",
 643                                 group);
 644                         return -1;
 645                 }
 646                 wpabuf_free(wpa_s->sme.sae_token);
 647                 wpa_s->sme.sae_token = wpabuf_alloc_copy(data + sizeof(le16),
 648                                                          len - sizeof(le16));
 649                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 650                                         wpa_s->current_ssid, 1);
 651                 return 0;
 652         }
 653
 654         if (auth_transaction == 1 &&
 655             status_code == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED &&
 656             wpa_s->sme.sae.state == SAE_COMMITTED &&
 657             wpa_s->current_bss && wpa_s->current_ssid) {
 658                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE group not supported");
 659                 wpa_s->sme.sae_group_index++;
 660                 if (sme_set_sae_group(wpa_s) < 0)
 661                         return -1; /* no other groups enabled */
 662                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Try next enabled SAE group");
 663                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 664                                         wpa_s->current_ssid, 1);
 665                 return 0;
 666         }
 667
 668         if (status_code != WLAN_STATUS_SUCCESS)
 669                 return -1;
 670
 671         if (auth_transaction == 1) {
 672                 groups = wpa_s->conf->sae_groups;
 673
 674                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
 675                 if (wpa_s->current_bss == NULL ||
 676                     wpa_s->current_ssid == NULL)
 677                         return -1;
 678                 if (wpa_s->sme.sae.state != SAE_COMMITTED)
 679                         return -1;
 680                 if (groups && groups[0] <= 0)
 681                         groups = NULL;
 682                 if (sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL,
 683                                      groups) != WLAN_STATUS_SUCCESS)
 684                         return -1;
 685
 686                 if (sae_process_commit(&wpa_s->sme.sae) < 0) {
 687                         wpa_printf(MSG_DEBUG, "SAE: Failed to process peer "
 688                                    "commit");
 689                         return -1;
 690                 }
 691
 692                 wpabuf_free(wpa_s->sme.sae_token);
 693                 wpa_s->sme.sae_token = NULL;
 694                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 695                                         wpa_s->current_ssid, 0);
 696                 return 0;
 697         } else if (auth_transaction == 2) {
 698                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
 699                 if (wpa_s->sme.sae.state != SAE_CONFIRMED)
 700                         return -1;
 701                 if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0)
 702                         return -1;
 703                 wpa_s->sme.sae.state = SAE_ACCEPTED;
 704                 sae_clear_temp_data(&wpa_s->sme.sae);
 705                 return 1;
 706         }
 707
 708         return -1;
 709 }
 710 #endif /* CONFIG_SAE */
 711
 712
 713 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
 714 {
 715         struct wpa_ssid *ssid = wpa_s->current_ssid;
 716
 717         if (ssid == NULL) {
 718                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 719                         "when network is not selected");
 720                 return;
 721         }
 722
 723         if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
 724                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 725                         "when not in authenticating state");
 726                 return;
 727         }
 728
 729         if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
 730                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
 731                         "unexpected peer " MACSTR,
 732                         MAC2STR(data->auth.peer));
 733                 return;
 734         }
 735
 736         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
 737                 " auth_type=%d auth_transaction=%d status_code=%d",
 738                 MAC2STR(data->auth.peer), data->auth.auth_type,
 739                 data->auth.auth_transaction, data->auth.status_code);
 740         wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
 741                     data->auth.ies, data->auth.ies_len);
 742
 743         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 744
 745 #ifdef CONFIG_SAE
 746         if (data->auth.auth_type == WLAN_AUTH_SAE) {
 747                 int res;
 748                 res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
 749                                    data->auth.status_code, data->auth.ies,
 750                                    data->auth.ies_len);
 751                 if (res < 0) {
 752                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 753                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 754
 755                 }
 756                 if (res != 1)
 757                         return;
 758
 759                 wpa_printf(MSG_DEBUG, "SME: SAE completed - setting PMK for "
 760                            "4-way handshake");
 761                 wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN,
 762                                wpa_s->pending_bssid);
 763         }
 764 #endif /* CONFIG_SAE */
 765
 766         if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
 767                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
 768                         "code %d)", data->auth.status_code);
 769
 770                 if (data->auth.status_code !=
 771                     WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
 772                     wpa_s->sme.auth_alg == data->auth.auth_type ||
 773                     wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
 774                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 775                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 776                         return;
 777                 }
 778
 779                 wpas_connect_work_done(wpa_s);
 780
 781                 switch (data->auth.auth_type) {
 782                 case WLAN_AUTH_OPEN:
 783                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 784
 785                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
 786                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 787                                                  wpa_s->current_ssid);
 788                         return;
 789
 790                 case WLAN_AUTH_SHARED_KEY:
 791                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
 792
 793                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
 794                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 795                                                  wpa_s->current_ssid);
 796                         return;
 797
 798                 default:
 799                         return;
 800                 }
 801         }
 802
 803 #ifdef CONFIG_IEEE80211R
 804         if (data->auth.auth_type == WLAN_AUTH_FT) {
 805                 union wpa_event_data edata;
 806                 os_memset(&edata, 0, sizeof(edata));
 807                 edata.ft_ies.ies = data->auth.ies;
 808                 edata.ft_ies.ies_len = data->auth.ies_len;
 809                 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
 810                 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
 811         }
 812 #endif /* CONFIG_IEEE80211R */
 813
 814         sme_associate(wpa_s, ssid->mode, data->auth.peer,
 815                       data->auth.auth_type);
 816 }
 817
 818
 819 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
 820                    const u8 *bssid, u16 auth_type)
 821 {
 822         struct wpa_driver_associate_params params;
 823         struct ieee802_11_elems elems;
 824 #ifdef CONFIG_HT_OVERRIDES
 825         struct ieee80211_ht_capabilities htcaps;
 826         struct ieee80211_ht_capabilities htcaps_mask;
 827 #endif /* CONFIG_HT_OVERRIDES */
 828 #ifdef CONFIG_VHT_OVERRIDES
 829         struct ieee80211_vht_capabilities vhtcaps;
 830         struct ieee80211_vht_capabilities vhtcaps_mask;
 831 #endif /* CONFIG_VHT_OVERRIDES */
 832
 833         os_memset(&params, 0, sizeof(params));
 834         params.bssid = bssid;
 835         params.ssid = wpa_s->sme.ssid;
 836         params.ssid_len = wpa_s->sme.ssid_len;
 837         params.freq.freq = wpa_s->sme.freq;
 838         params.bg_scan_period = wpa_s->current_ssid ?
 839                 wpa_s->current_ssid->bg_scan_period : -1;
 840         params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
 841                 wpa_s->sme.assoc_req_ie : NULL;
 842         params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
 843         params.pairwise_suite = wpa_s->pairwise_cipher;
 844         params.group_suite = wpa_s->group_cipher;
 845         params.key_mgmt_suite = wpa_s->key_mgmt;
 846         params.wpa_proto = wpa_s->wpa_proto;
 847 #ifdef CONFIG_HT_OVERRIDES
 848         os_memset(&htcaps, 0, sizeof(htcaps));
 849         os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
 850         params.htcaps = (u8 *) &htcaps;
 851         params.htcaps_mask = (u8 *) &htcaps_mask;
 852         wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, &params);
 853 #endif /* CONFIG_HT_OVERRIDES */
 854 #ifdef CONFIG_VHT_OVERRIDES
 855         os_memset(&vhtcaps, 0, sizeof(vhtcaps));
 856         os_memset(&vhtcaps_mask, 0, sizeof(vhtcaps_mask));
 857         params.vhtcaps = &vhtcaps;
 858         params.vhtcaps_mask = &vhtcaps_mask;
 859         wpa_supplicant_apply_vht_overrides(wpa_s, wpa_s->current_ssid, &params);
 860 #endif /* CONFIG_VHT_OVERRIDES */
 861 #ifdef CONFIG_IEEE80211R
 862         if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
 863                 params.wpa_ie = wpa_s->sme.ft_ies;
 864                 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
 865         }
 866 #endif /* CONFIG_IEEE80211R */
 867         params.mode = mode;
 868         params.mgmt_frame_protection = wpa_s->sme.mfp;
 869         params.rrm_used = wpa_s->rrm.rrm_used;
 870         if (wpa_s->sme.prev_bssid_set)
 871                 params.prev_bssid = wpa_s->sme.prev_bssid;
 872
 873         wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
 874                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 875                 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
 876                 params.freq.freq);
 877
 878         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
 879
 880         if (params.wpa_ie == NULL ||
 881             ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
 882             < 0) {
 883                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
 884                 os_memset(&elems, 0, sizeof(elems));
 885         }
 886         if (elems.rsn_ie) {
 887                 params.wpa_proto = WPA_PROTO_RSN;
 888                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
 889                                         elems.rsn_ie_len + 2);
 890         } else if (elems.wpa_ie) {
 891                 params.wpa_proto = WPA_PROTO_WPA;
 892                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
 893                                         elems.wpa_ie_len + 2);
 894         } else if (elems.osen) {
 895                 params.wpa_proto = WPA_PROTO_OSEN;
 896                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.osen - 2,
 897                                         elems.osen_len + 2);
 898         } else
 899                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 900         if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
 901                 params.p2p = 1;
 902
 903         if (wpa_s->parent->set_sta_uapsd)
 904                 params.uapsd = wpa_s->parent->sta_uapsd;
 905         else
 906                 params.uapsd = -1;
 907
 908         if (wpa_drv_associate(wpa_s, &params) < 0) {
 909                 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
 910                         "driver failed");
 911                 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 912                 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 913                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 914                 return;
 915         }
 916
 917         eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
 918                                NULL);
 919 }
 920
 921
 922 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
 923                       const u8 *ies, size_t ies_len)
 924 {
 925         if (md == NULL || ies == NULL) {
 926                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
 927                 os_free(wpa_s->sme.ft_ies);
 928                 wpa_s->sme.ft_ies = NULL;
 929                 wpa_s->sme.ft_ies_len = 0;
 930                 wpa_s->sme.ft_used = 0;
 931                 return 0;
 932         }
 933
 934         os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
 935         wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
 936         os_free(wpa_s->sme.ft_ies);
 937         wpa_s->sme.ft_ies = os_malloc(ies_len);
 938         if (wpa_s->sme.ft_ies == NULL)
 939                 return -1;
 940         os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
 941         wpa_s->sme.ft_ies_len = ies_len;
 942         return 0;
 943 }
 944
 945
 946 static void sme_deauth(struct wpa_supplicant *wpa_s)
 947 {
 948         int bssid_changed;
 949
 950         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 951
 952         if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
 953                                    WLAN_REASON_DEAUTH_LEAVING) < 0) {
 954                 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
 955                         "failed");
 956         }
 957         wpa_s->sme.prev_bssid_set = 0;
 958
 959         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 960         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 961         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 962         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 963         if (bssid_changed)
 964                 wpas_notify_bssid_changed(wpa_s);
 965 }
 966
 967
 968 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
 969                             union wpa_event_data *data)
 970 {
 971         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
 972                 "status code %d", MAC2STR(wpa_s->pending_bssid),
 973                 data->assoc_reject.status_code);
 974
 975         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 976
 977 #ifdef CONFIG_SAE
 978         if (wpa_s->sme.sae_pmksa_caching && wpa_s->current_ssid &&
 979             wpa_key_mgmt_sae(wpa_s->current_ssid->key_mgmt)) {
 980                 wpa_dbg(wpa_s, MSG_DEBUG,
 981                         "PMKSA caching attempt rejected - drop PMKSA cache entry and fall back to SAE authentication");
 982                 wpa_sm_aborted_cached(wpa_s->wpa);
 983                 wpa_sm_pmksa_cache_flush(wpa_s->wpa, wpa_s->current_ssid);
 984                 if (wpa_s->current_bss) {
 985                         struct wpa_bss *bss = wpa_s->current_bss;
 986                         struct wpa_ssid *ssid = wpa_s->current_ssid;
 987
 988                         wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
 989                                                WLAN_REASON_DEAUTH_LEAVING);
 990                         wpas_connect_work_done(wpa_s);
 991                         wpa_supplicant_mark_disassoc(wpa_s);
 992                         wpa_supplicant_connect(wpa_s, bss, ssid);
 993                         return;
 994                 }
 995         }
 996 #endif /* CONFIG_SAE */
 997
 998         /*
 999          * For now, unconditionally terminate the previous authentication. In
1000          * theory, this should not be needed, but mac80211 gets quite confused
1001          * if the authentication is left pending.. Some roaming cases might
1002          * benefit from using the previous authentication, so this could be
1003          * optimized in the future.
1004          */
1005         sme_deauth(wpa_s);
1006 }
1007
1008
1009 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
1010                               union wpa_event_data *data)
1011 {
1012         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
1013         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1014         wpa_supplicant_mark_disassoc(wpa_s);
1015 }
1016
1017
1018 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
1019                                union wpa_event_data *data)
1020 {
1021         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
1022         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1023         wpa_supplicant_mark_disassoc(wpa_s);
1024 }
1025
1026
1027 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
1028                         struct disassoc_info *info)
1029 {
1030         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
1031         if (wpa_s->sme.prev_bssid_set) {
1032                 /*
1033                  * cfg80211/mac80211 can get into somewhat confused state if
1034                  * the AP only disassociates us and leaves us in authenticated
1035                  * state. For now, force the state to be cleared to avoid
1036                  * confusing errors if we try to associate with the AP again.
1037                  */
1038                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
1039                         "driver state");
1040                 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
1041                                        WLAN_REASON_DEAUTH_LEAVING);
1042         }
1043 }
1044
1045
1046 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
1047 {
1048         struct wpa_supplicant *wpa_s = eloop_ctx;
1049         if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
1050                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
1051                 sme_deauth(wpa_s);
1052         }
1053 }
1054
1055
1056 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
1057 {
1058         struct wpa_supplicant *wpa_s = eloop_ctx;
1059         if (wpa_s->wpa_state == WPA_ASSOCIATING) {
1060                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
1061                 sme_deauth(wpa_s);
1062         }
1063 }
1064
1065
1066 void sme_state_changed(struct wpa_supplicant *wpa_s)
1067 {
1068         /* Make sure timers are cleaned up appropriately. */
1069         if (wpa_s->wpa_state != WPA_ASSOCIATING)
1070                 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1071         if (wpa_s->wpa_state != WPA_AUTHENTICATING)
1072                 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1073 }
1074
1075
1076 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
1077                                        const u8 *prev_pending_bssid)
1078 {
1079         /*
1080          * mac80211-workaround to force deauth on failed auth cmd,
1081          * requires us to remain in authenticating state to allow the
1082          * second authentication attempt to be continued properly.
1083          */
1084         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
1085                 "to proceed after disconnection event");
1086         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
1087         os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
1088
1089         /*
1090          * Re-arm authentication timer in case auth fails for whatever reason.
1091          */
1092         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1093         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
1094                                NULL);
1095 }
1096
1097
1098 void sme_deinit(struct wpa_supplicant *wpa_s)
1099 {
1100         os_free(wpa_s->sme.ft_ies);
1101         wpa_s->sme.ft_ies = NULL;
1102         wpa_s->sme.ft_ies_len = 0;
1103 #ifdef CONFIG_IEEE80211W
1104         sme_stop_sa_query(wpa_s);
1105 #endif /* CONFIG_IEEE80211W */
1106 #ifdef CONFIG_SAE
1107         wpabuf_free(wpa_s->sme.sae_token);
1108         wpa_s->sme.sae_token = NULL;
1109         sae_clear_data(&wpa_s->sme.sae);
1110 #endif /* CONFIG_SAE */
1111
1112         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1113         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1114         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1115 }
1116
1117
1118 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
1119                                    const u8 *chan_list, u8 num_channels,
1120                                    u8 num_intol)
1121 {
1122         struct ieee80211_2040_bss_coex_ie *bc_ie;
1123         struct ieee80211_2040_intol_chan_report *ic_report;
1124         struct wpabuf *buf;
1125
1126         wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR
1127                    " (num_channels=%u num_intol=%u)",
1128                    MAC2STR(wpa_s->bssid), num_channels, num_intol);
1129         wpa_hexdump(MSG_DEBUG, "SME: 20/40 BSS Intolerant Channels",
1130                     chan_list, num_channels);
1131
1132         buf = wpabuf_alloc(2 + /* action.category + action_code */
1133                            sizeof(struct ieee80211_2040_bss_coex_ie) +
1134                            sizeof(struct ieee80211_2040_intol_chan_report) +
1135                            num_channels);
1136         if (buf == NULL)
1137                 return;
1138
1139         wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
1140         wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
1141
1142         bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
1143         bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
1144         bc_ie->length = 1;
1145         if (num_intol)
1146                 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
1147
1148         if (num_channels > 0) {
1149                 ic_report = wpabuf_put(buf, sizeof(*ic_report));
1150                 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
1151                 ic_report->length = num_channels + 1;
1152                 ic_report->op_class = 0;
1153                 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
1154                           num_channels);
1155         }
1156
1157         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1158                                 wpa_s->own_addr, wpa_s->bssid,
1159                                 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
1160                 wpa_msg(wpa_s, MSG_INFO,
1161                         "SME: Failed to send 20/40 BSS Coexistence frame");
1162         }
1163
1164         wpabuf_free(buf);
1165 }
1166
1167
1168 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
1169 {
1170         struct wpa_bss *bss;
1171         const u8 *ie;
1172         u16 ht_cap;
1173         u8 chan_list[P2P_MAX_CHANNELS], channel;
1174         u8 num_channels = 0, num_intol = 0, i;
1175
1176         if (!wpa_s->sme.sched_obss_scan)
1177                 return 0;
1178
1179         wpa_s->sme.sched_obss_scan = 0;
1180         if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
1181                 return 1;
1182
1183         /*
1184          * Check whether AP uses regulatory triplet or channel triplet in
1185          * country info. Right now the operating class of the BSS channel
1186          * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
1187          * based on the assumption that operating class triplet is not used in
1188          * beacon frame. If the First Channel Number/Operating Extension
1189          * Identifier octet has a positive integer value of 201 or greater,
1190          * then its operating class triplet.
1191          *
1192          * TODO: If Supported Operating Classes element is present in beacon
1193          * frame, have to lookup operating class in Annex E and fill them in
1194          * 2040 coex frame.
1195          */
1196         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
1197         if (ie && (ie[1] >= 6) && (ie[5] >= 201))
1198                 return 1;
1199
1200         os_memset(chan_list, 0, sizeof(chan_list));
1201
1202         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1203                 /* Skip other band bss */
1204                 enum hostapd_hw_mode mode;
1205                 mode = ieee80211_freq_to_chan(bss->freq, &channel);
1206                 if (mode != HOSTAPD_MODE_IEEE80211G &&
1207                     mode != HOSTAPD_MODE_IEEE80211B)
1208                         continue;
1209
1210                 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
1211                 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
1212                 wpa_printf(MSG_DEBUG, "SME OBSS scan BSS " MACSTR
1213                            " freq=%u chan=%u ht_cap=0x%x",
1214                            MAC2STR(bss->bssid), bss->freq, channel, ht_cap);
1215
1216                 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
1217                         if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
1218                                 num_intol++;
1219
1220                         /* Check whether the channel is already considered */
1221                         for (i = 0; i < num_channels; i++) {
1222                                 if (channel == chan_list[i])
1223                                         break;
1224                         }
1225                         if (i != num_channels)
1226                                 continue;
1227
1228                         chan_list[num_channels++] = channel;
1229                 }
1230         }
1231
1232         sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
1233         return 1;
1234 }
1235
1236
1237 static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
1238                                           u16 num_modes,
1239                                           enum hostapd_hw_mode mode)
1240 {
1241         u16 i;
1242
1243         for (i = 0; i < num_modes; i++) {
1244                 if (modes[i].mode == mode)
1245                         return &modes[i];
1246         }
1247
1248         return NULL;
1249 }
1250
1251
1252 static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s,
1253                                         enum hostapd_hw_mode band,
1254                                         struct wpa_driver_scan_params *params)
1255 {
1256         /* Include only supported channels for the specified band */
1257         struct hostapd_hw_modes *mode;
1258         int count, i;
1259
1260         mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band);
1261         if (mode == NULL) {
1262                 /* No channels supported in this band - use empty list */
1263                 params->freqs = os_zalloc(sizeof(int));
1264                 return;
1265         }
1266
1267         params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
1268         if (params->freqs == NULL)
1269                 return;
1270         for (count = 0, i = 0; i < mode->num_channels; i++) {
1271                 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
1272                         continue;
1273                 params->freqs[count++] = mode->channels[i].freq;
1274         }
1275 }
1276
1277
1278 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1279 {
1280         struct wpa_supplicant *wpa_s = eloop_ctx;
1281         struct wpa_driver_scan_params params;
1282
1283         if (!wpa_s->current_bss) {
1284                 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
1285                 return;
1286         }
1287
1288         os_memset(&params, 0, sizeof(params));
1289         wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G, &params);
1290         params.low_priority = 1;
1291         wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
1292
1293         if (wpa_supplicant_trigger_scan(wpa_s, &params))
1294                 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
1295         else
1296                 wpa_s->sme.sched_obss_scan = 1;
1297         os_free(params.freqs);
1298
1299         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1300                                sme_obss_scan_timeout, wpa_s, NULL);
1301 }
1302
1303
1304 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
1305 {
1306         const u8 *ie;
1307         struct wpa_bss *bss = wpa_s->current_bss;
1308         struct wpa_ssid *ssid = wpa_s->current_ssid;
1309         struct hostapd_hw_modes *hw_mode = NULL;
1310         int i;
1311
1312         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1313         wpa_s->sme.sched_obss_scan = 0;
1314         if (!enable)
1315                 return;
1316
1317         /*
1318          * Schedule OBSS scan if driver is using station SME in wpa_supplicant
1319          * or it expects OBSS scan to be performed by wpa_supplicant.
1320          */
1321         if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
1322               (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
1323             ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
1324                 return;
1325
1326         if (!wpa_s->hw.modes)
1327                 return;
1328
1329         /* only HT caps in 11g mode are relevant */
1330         for (i = 0; i < wpa_s->hw.num_modes; i++) {
1331                 hw_mode = &wpa_s->hw.modes[i];
1332                 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
1333                         break;
1334         }
1335
1336         /* Driver does not support HT40 for 11g or doesn't have 11g. */
1337         if (i == wpa_s->hw.num_modes || !hw_mode ||
1338             !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1339                 return;
1340
1341         if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
1342                 return; /* Not associated on 2.4 GHz band */
1343
1344         /* Check whether AP supports HT40 */
1345         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
1346         if (!ie || ie[1] < 2 ||
1347             !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1348                 return; /* AP does not support HT40 */
1349
1350         ie = wpa_bss_get_ie(wpa_s->current_bss,
1351                             WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
1352         if (!ie || ie[1] < 14)
1353                 return; /* AP does not request OBSS scans */
1354
1355         wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
1356         if (wpa_s->sme.obss_scan_int < 10) {
1357                 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
1358                            "replaced with the minimum 10 sec",
1359                            wpa_s->sme.obss_scan_int);
1360                 wpa_s->sme.obss_scan_int = 10;
1361         }
1362         wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
1363                    wpa_s->sme.obss_scan_int);
1364         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1365                                sme_obss_scan_timeout, wpa_s, NULL);
1366 }
1367
1368
1369 #ifdef CONFIG_IEEE80211W
1370
1371 static const unsigned int sa_query_max_timeout = 1000;
1372 static const unsigned int sa_query_retry_timeout = 201;
1373
1374 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
1375 {
1376         u32 tu;
1377         struct os_reltime now, passed;
1378         os_get_reltime(&now);
1379         os_reltime_sub(&now, &wpa_s->sme.sa_query_start, &passed);
1380         tu = (passed.sec * 1000000 + passed.usec) / 1024;
1381         if (sa_query_max_timeout < tu) {
1382                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
1383                 sme_stop_sa_query(wpa_s);
1384                 wpa_supplicant_deauthenticate(
1385                         wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
1386                 return 1;
1387         }
1388
1389         return 0;
1390 }
1391
1392
1393 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
1394                                   const u8 *trans_id)
1395 {
1396         u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
1397         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
1398                 MACSTR, MAC2STR(wpa_s->bssid));
1399         wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
1400                     trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1401         req[0] = WLAN_ACTION_SA_QUERY;
1402         req[1] = WLAN_SA_QUERY_REQUEST;
1403         os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1404         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1405                                 wpa_s->own_addr, wpa_s->bssid,
1406                                 req, sizeof(req), 0) < 0)
1407                 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
1408                         "Request");
1409 }
1410
1411
1412 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
1413 {
1414         struct wpa_supplicant *wpa_s = eloop_ctx;
1415         unsigned int timeout, sec, usec;
1416         u8 *trans_id, *nbuf;
1417
1418         if (wpa_s->sme.sa_query_count > 0 &&
1419             sme_check_sa_query_timeout(wpa_s))
1420                 return;
1421
1422         nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
1423                                 wpa_s->sme.sa_query_count + 1,
1424                                 WLAN_SA_QUERY_TR_ID_LEN);
1425         if (nbuf == NULL)
1426                 return;
1427         if (wpa_s->sme.sa_query_count == 0) {
1428                 /* Starting a new SA Query procedure */
1429                 os_get_reltime(&wpa_s->sme.sa_query_start);
1430         }
1431         trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
1432         wpa_s->sme.sa_query_trans_id = nbuf;
1433         wpa_s->sme.sa_query_count++;
1434
1435         if (os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN) < 0) {
1436                 wpa_printf(MSG_DEBUG, "Could not generate SA Query ID");
1437                 return;
1438         }
1439
1440         timeout = sa_query_retry_timeout;
1441         sec = ((timeout / 1000) * 1024) / 1000;
1442         usec = (timeout % 1000) * 1024;
1443         eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
1444
1445         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
1446                 wpa_s->sme.sa_query_count);
1447
1448         sme_send_sa_query_req(wpa_s, trans_id);
1449 }
1450
1451
1452 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
1453 {
1454         sme_sa_query_timer(wpa_s, NULL);
1455 }
1456
1457
1458 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
1459 {
1460         eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
1461         os_free(wpa_s->sme.sa_query_trans_id);
1462         wpa_s->sme.sa_query_trans_id = NULL;
1463         wpa_s->sme.sa_query_count = 0;
1464 }
1465
1466
1467 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1468                                  const u8 *da, u16 reason_code)
1469 {
1470         struct wpa_ssid *ssid;
1471         struct os_reltime now;
1472
1473         if (wpa_s->wpa_state != WPA_COMPLETED)
1474                 return;
1475         ssid = wpa_s->current_ssid;
1476         if (ssid == NULL ||
1477             (ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
1478              wpa_s->conf->pmf : ssid->ieee80211w) == NO_MGMT_FRAME_PROTECTION)
1479                 return;
1480         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1481                 return;
1482         if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1483             reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1484                 return;
1485         if (wpa_s->sme.sa_query_count > 0)
1486                 return;
1487
1488         os_get_reltime(&now);
1489         if (wpa_s->sme.last_unprot_disconnect.sec &&
1490             !os_reltime_expired(&now, &wpa_s->sme.last_unprot_disconnect, 10))
1491                 return; /* limit SA Query procedure frequency */
1492         wpa_s->sme.last_unprot_disconnect = now;
1493
1494         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1495                 "possible AP/STA state mismatch - trigger SA Query");
1496         sme_start_sa_query(wpa_s);
1497 }
1498
1499
1500 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1501                      const u8 *data, size_t len)
1502 {
1503         int i;
1504
1505         if (wpa_s->sme.sa_query_trans_id == NULL ||
1506             len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1507             data[0] != WLAN_SA_QUERY_RESPONSE)
1508                 return;
1509         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1510                 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1511
1512         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1513                 return;
1514
1515         for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1516                 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1517                               i * WLAN_SA_QUERY_TR_ID_LEN,
1518                               data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1519                         break;
1520         }
1521
1522         if (i >= wpa_s->sme.sa_query_count) {
1523                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1524                         "transaction identifier found");
1525                 return;
1526         }
1527
1528         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1529                 "from " MACSTR, MAC2STR(sa));
1530         sme_stop_sa_query(wpa_s);
1531 }
1532
1533 #endif /* CONFIG_IEEE80211W */