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         int skip_auth;
 211
 212         if (bss == NULL) {
 213                 wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for "
 214                         "the network");
 215                 wpas_connect_work_done(wpa_s);
 216                 return;
 217         }
 218
 219         skip_auth = wpa_s->conf->reassoc_same_bss_optim &&
 220                 wpa_s->reassoc_same_bss;
 221         wpa_s->current_bss = bss;
 222
 223         os_memset(&params, 0, sizeof(params));
 224         wpa_s->reassociate = 0;
 225
 226         params.freq = bss->freq;
 227         params.bssid = bss->bssid;
 228         params.ssid = bss->ssid;
 229         params.ssid_len = bss->ssid_len;
 230         params.p2p = ssid->p2p_group;
 231
 232         if (wpa_s->sme.ssid_len != params.ssid_len ||
 233             os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
 234                 wpa_s->sme.prev_bssid_set = 0;
 235
 236         wpa_s->sme.freq = params.freq;
 237         os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
 238         wpa_s->sme.ssid_len = params.ssid_len;
 239
 240         params.auth_alg = WPA_AUTH_ALG_OPEN;
 241 #ifdef IEEE8021X_EAPOL
 242         if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
 243                 if (ssid->leap) {
 244                         if (ssid->non_leap == 0)
 245                                 params.auth_alg = WPA_AUTH_ALG_LEAP;
 246                         else
 247                                 params.auth_alg |= WPA_AUTH_ALG_LEAP;
 248                 }
 249         }
 250 #endif /* IEEE8021X_EAPOL */
 251         wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
 252                 params.auth_alg);
 253         if (ssid->auth_alg) {
 254                 params.auth_alg = ssid->auth_alg;
 255                 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
 256                         "0x%x", params.auth_alg);
 257         }
 258 #ifdef CONFIG_SAE
 259         wpa_s->sme.sae_pmksa_caching = 0;
 260         if (wpa_key_mgmt_sae(ssid->key_mgmt)) {
 261                 const u8 *rsn;
 262                 struct wpa_ie_data ied;
 263
 264                 rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 265                 if (!rsn) {
 266                         wpa_dbg(wpa_s, MSG_DEBUG,
 267                                 "SAE enabled, but target BSS does not advertise RSN");
 268                 } else if (wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0 &&
 269                            wpa_key_mgmt_sae(ied.key_mgmt)) {
 270                         wpa_dbg(wpa_s, MSG_DEBUG, "Using SAE auth_alg");
 271                         params.auth_alg = WPA_AUTH_ALG_SAE;
 272                 } else {
 273                         wpa_dbg(wpa_s, MSG_DEBUG,
 274                                 "SAE enabled, but target BSS does not advertise SAE AKM for RSN");
 275                 }
 276         }
 277 #endif /* CONFIG_SAE */
 278
 279         for (i = 0; i < NUM_WEP_KEYS; i++) {
 280                 if (ssid->wep_key_len[i])
 281                         params.wep_key[i] = ssid->wep_key[i];
 282                 params.wep_key_len[i] = ssid->wep_key_len[i];
 283         }
 284         params.wep_tx_keyidx = ssid->wep_tx_keyidx;
 285
 286         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 287         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 288         os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
 289         if (bssid_changed)
 290                 wpas_notify_bssid_changed(wpa_s);
 291
 292         if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
 293              wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
 294             wpa_key_mgmt_wpa(ssid->key_mgmt)) {
 295                 int try_opportunistic;
 296                 try_opportunistic = (ssid->proactive_key_caching < 0 ?
 297                                      wpa_s->conf->okc :
 298                                      ssid->proactive_key_caching) &&
 299                         (ssid->proto & WPA_PROTO_RSN);
 300                 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
 301                                             wpa_s->current_ssid,
 302                                             try_opportunistic) == 0)
 303                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol);
 304                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 305                 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
 306                                               wpa_s->sme.assoc_req_ie,
 307                                               &wpa_s->sme.assoc_req_ie_len)) {
 308                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 309                                 "key management and encryption suites");
 310                         wpas_connect_work_done(wpa_s);
 311                         return;
 312                 }
 313         } else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
 314                    wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) {
 315                 /*
 316                  * Both WPA and non-WPA IEEE 802.1X enabled in configuration -
 317                  * use non-WPA since the scan results did not indicate that the
 318                  * AP is using WPA or WPA2.
 319                  */
 320                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 321                 wpa_s->sme.assoc_req_ie_len = 0;
 322         } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
 323                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 324                 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
 325                                               wpa_s->sme.assoc_req_ie,
 326                                               &wpa_s->sme.assoc_req_ie_len)) {
 327                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 328                                 "key management and encryption suites (no "
 329                                 "scan results)");
 330                         wpas_connect_work_done(wpa_s);
 331                         return;
 332                 }
 333 #ifdef CONFIG_WPS
 334         } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 335                 struct wpabuf *wps_ie;
 336                 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
 337                 if (wps_ie && wpabuf_len(wps_ie) <=
 338                     sizeof(wpa_s->sme.assoc_req_ie)) {
 339                         wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
 340                         os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
 341                                   wpa_s->sme.assoc_req_ie_len);
 342                 } else
 343                         wpa_s->sme.assoc_req_ie_len = 0;
 344                 wpabuf_free(wps_ie);
 345                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 346 #endif /* CONFIG_WPS */
 347         } else {
 348                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 349                 wpa_s->sme.assoc_req_ie_len = 0;
 350         }
 351
 352 #ifdef CONFIG_IEEE80211R
 353         ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
 354         if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
 355                 md = ie + 2;
 356         wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
 357         if (md) {
 358                 /* Prepare for the next transition */
 359                 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
 360         }
 361
 362         if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) {
 363                 if (wpa_s->sme.assoc_req_ie_len + 5 <
 364                     sizeof(wpa_s->sme.assoc_req_ie)) {
 365                         struct rsn_mdie *mdie;
 366                         u8 *pos = wpa_s->sme.assoc_req_ie +
 367                                 wpa_s->sme.assoc_req_ie_len;
 368                         *pos++ = WLAN_EID_MOBILITY_DOMAIN;
 369                         *pos++ = sizeof(*mdie);
 370                         mdie = (struct rsn_mdie *) pos;
 371                         os_memcpy(mdie->mobility_domain, md,
 372                                   MOBILITY_DOMAIN_ID_LEN);
 373                         mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
 374                         wpa_s->sme.assoc_req_ie_len += 5;
 375                 }
 376
 377                 if (wpa_s->sme.ft_used &&
 378                     os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
 379                     wpa_sm_has_ptk(wpa_s->wpa)) {
 380                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT "
 381                                 "over-the-air");
 382                         params.auth_alg = WPA_AUTH_ALG_FT;
 383                         params.ie = wpa_s->sme.ft_ies;
 384                         params.ie_len = wpa_s->sme.ft_ies_len;
 385                 }
 386         }
 387 #endif /* CONFIG_IEEE80211R */
 388
 389 #ifdef CONFIG_IEEE80211W
 390         wpa_s->sme.mfp = wpas_get_ssid_pmf(wpa_s, ssid);
 391         if (wpa_s->sme.mfp != NO_MGMT_FRAME_PROTECTION) {
 392                 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 393                 struct wpa_ie_data _ie;
 394                 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
 395                     _ie.capabilities &
 396                     (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
 397                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
 398                                 "MFP: require MFP");
 399                         wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
 400                 }
 401         }
 402 #endif /* CONFIG_IEEE80211W */
 403
 404 #ifdef CONFIG_P2P
 405         if (wpa_s->global->p2p) {
 406                 u8 *pos;
 407                 size_t len;
 408                 int res;
 409                 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
 410                 len = sizeof(wpa_s->sme.assoc_req_ie) -
 411                         wpa_s->sme.assoc_req_ie_len;
 412                 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
 413                                             ssid->p2p_group);
 414                 if (res >= 0)
 415                         wpa_s->sme.assoc_req_ie_len += res;
 416         }
 417 #endif /* CONFIG_P2P */
 418
 419 #ifdef CONFIG_HS20
 420         if (is_hs20_network(wpa_s, ssid, bss)) {
 421                 struct wpabuf *hs20;
 422                 hs20 = wpabuf_alloc(20);
 423                 if (hs20) {
 424                         int pps_mo_id = hs20_get_pps_mo_id(wpa_s, ssid);
 425                         size_t len;
 426
 427                         wpas_hs20_add_indication(hs20, pps_mo_id);
 428                         len = sizeof(wpa_s->sme.assoc_req_ie) -
 429                                 wpa_s->sme.assoc_req_ie_len;
 430                         if (wpabuf_len(hs20) <= len) {
 431                                 os_memcpy(wpa_s->sme.assoc_req_ie +
 432                                           wpa_s->sme.assoc_req_ie_len,
 433                                           wpabuf_head(hs20), wpabuf_len(hs20));
 434                                 wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
 435                         }
 436                         wpabuf_free(hs20);
 437                 }
 438         }
 439 #endif /* CONFIG_HS20 */
 440
 441 #ifdef CONFIG_FST
 442         if (wpa_s->fst_ies) {
 443                 int fst_ies_len = wpabuf_len(wpa_s->fst_ies);
 444
 445                 if (wpa_s->sme.assoc_req_ie_len + fst_ies_len <=
 446                     sizeof(wpa_s->sme.assoc_req_ie)) {
 447                         os_memcpy(wpa_s->sme.assoc_req_ie +
 448                                   wpa_s->sme.assoc_req_ie_len,
 449                                   wpabuf_head(wpa_s->fst_ies),
 450                                   fst_ies_len);
 451                         wpa_s->sme.assoc_req_ie_len += fst_ies_len;
 452                 }
 453         }
 454 #endif /* CONFIG_FST */
 455
 456         ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab,
 457                                              sizeof(ext_capab));
 458         if (ext_capab_len > 0) {
 459                 u8 *pos = wpa_s->sme.assoc_req_ie;
 460                 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
 461                         pos += 2 + pos[1];
 462                 os_memmove(pos + ext_capab_len, pos,
 463                            wpa_s->sme.assoc_req_ie_len -
 464                            (pos - wpa_s->sme.assoc_req_ie));
 465                 wpa_s->sme.assoc_req_ie_len += ext_capab_len;
 466                 os_memcpy(pos, ext_capab, ext_capab_len);
 467         }
 468
 469         if (wpa_s->vendor_elem[VENDOR_ELEM_ASSOC_REQ]) {
 470                 struct wpabuf *buf = wpa_s->vendor_elem[VENDOR_ELEM_ASSOC_REQ];
 471                 size_t len;
 472
 473                 len = sizeof(wpa_s->sme.assoc_req_ie) -
 474                         wpa_s->sme.assoc_req_ie_len;
 475                 if (wpabuf_len(buf) <= len) {
 476                         os_memcpy(wpa_s->sme.assoc_req_ie +
 477                                   wpa_s->sme.assoc_req_ie_len,
 478                                   wpabuf_head(buf), wpabuf_len(buf));
 479                         wpa_s->sme.assoc_req_ie_len += wpabuf_len(buf);
 480                 }
 481         }
 482
 483         sme_auth_handle_rrm(wpa_s, bss);
 484
 485 #ifdef CONFIG_SAE
 486         if (!skip_auth && params.auth_alg == WPA_AUTH_ALG_SAE &&
 487             pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid, ssid, 0) == 0)
 488         {
 489                 wpa_dbg(wpa_s, MSG_DEBUG,
 490                         "PMKSA cache entry found - try to use PMKSA caching instead of new SAE authentication");
 491                 params.auth_alg = WPA_AUTH_ALG_OPEN;
 492                 wpa_s->sme.sae_pmksa_caching = 1;
 493         }
 494
 495         if (!skip_auth && params.auth_alg == WPA_AUTH_ALG_SAE) {
 496                 if (start)
 497                         resp = sme_auth_build_sae_commit(wpa_s, ssid,
 498                                                          bss->bssid);
 499                 else
 500                         resp = sme_auth_build_sae_confirm(wpa_s);
 501                 if (resp == NULL) {
 502                         wpas_connection_failed(wpa_s, bss->bssid);
 503                         return;
 504                 }
 505                 params.sae_data = wpabuf_head(resp);
 506                 params.sae_data_len = wpabuf_len(resp);
 507                 wpa_s->sme.sae.state = start ? SAE_COMMITTED : SAE_CONFIRMED;
 508         }
 509 #endif /* CONFIG_SAE */
 510
 511         wpa_supplicant_cancel_sched_scan(wpa_s);
 512         wpa_supplicant_cancel_scan(wpa_s);
 513
 514         wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
 515                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 516                 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
 517
 518         wpa_clear_keys(wpa_s, bss->bssid);
 519         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 520         old_ssid = wpa_s->current_ssid;
 521         wpa_s->current_ssid = ssid;
 522         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
 523         wpa_supplicant_initiate_eapol(wpa_s);
 524         if (old_ssid != wpa_s->current_ssid)
 525                 wpas_notify_network_changed(wpa_s);
 526
 527 #ifdef CONFIG_P2P
 528         /*
 529          * If multi-channel concurrency is not supported, check for any
 530          * frequency conflict. In case of any frequency conflict, remove the
 531          * least prioritized connection.
 532          */
 533         if (wpa_s->num_multichan_concurrent < 2) {
 534                 int freq, num;
 535                 num = get_shared_radio_freqs(wpa_s, &freq, 1);
 536                 if (num > 0 && freq > 0 && freq != params.freq) {
 537                         wpa_printf(MSG_DEBUG,
 538                                    "Conflicting frequency found (%d != %d)",
 539                                    freq, params.freq);
 540                         if (wpas_p2p_handle_frequency_conflicts(wpa_s,
 541                                                                 params.freq,
 542                                                                 ssid) < 0) {
 543                                 wpas_connection_failed(wpa_s, bss->bssid);
 544                                 wpa_supplicant_mark_disassoc(wpa_s);
 545                                 wpabuf_free(resp);
 546                                 wpas_connect_work_done(wpa_s);
 547                                 return;
 548                         }
 549                 }
 550         }
 551 #endif /* CONFIG_P2P */
 552
 553         if (skip_auth) {
 554                 wpa_msg(wpa_s, MSG_DEBUG,
 555                         "SME: Skip authentication step on reassoc-to-same-BSS");
 556                 wpabuf_free(resp);
 557                 sme_associate(wpa_s, ssid->mode, bss->bssid, WLAN_AUTH_OPEN);
 558                 return;
 559         }
 560
 561
 562         wpa_s->sme.auth_alg = params.auth_alg;
 563         if (wpa_drv_authenticate(wpa_s, &params) < 0) {
 564                 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
 565                         "driver failed");
 566                 wpas_connection_failed(wpa_s, bss->bssid);
 567                 wpa_supplicant_mark_disassoc(wpa_s);
 568                 wpabuf_free(resp);
 569                 wpas_connect_work_done(wpa_s);
 570                 return;
 571         }
 572
 573         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 574                                NULL);
 575
 576         /*
 577          * Association will be started based on the authentication event from
 578          * the driver.
 579          */
 580
 581         wpabuf_free(resp);
 582 }
 583
 584
 585 static void sme_auth_start_cb(struct wpa_radio_work *work, int deinit)
 586 {
 587         struct wpa_connect_work *cwork = work->ctx;
 588         struct wpa_supplicant *wpa_s = work->wpa_s;
 589
 590         if (deinit) {
 591                 if (work->started)
 592                         wpa_s->connect_work = NULL;
 593
 594                 wpas_connect_work_free(cwork);
 595                 return;
 596         }
 597
 598         wpa_s->connect_work = work;
 599
 600         if (cwork->bss_removed ||
 601             !wpas_valid_bss_ssid(wpa_s, cwork->bss, cwork->ssid) ||
 602             wpas_network_disabled(wpa_s, cwork->ssid)) {
 603                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: BSS/SSID entry for authentication not valid anymore - drop connection attempt");
 604                 wpas_connect_work_done(wpa_s);
 605                 return;
 606         }
 607
 608         sme_send_authentication(wpa_s, cwork->bss, cwork->ssid, 1);
 609 }
 610
 611
 612 void sme_authenticate(struct wpa_supplicant *wpa_s,
 613                       struct wpa_bss *bss, struct wpa_ssid *ssid)
 614 {
 615         struct wpa_connect_work *cwork;
 616
 617         if (bss == NULL || ssid == NULL)
 618                 return;
 619         if (wpa_s->connect_work) {
 620                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reject sme_authenticate() call since connect_work exist");
 621                 return;
 622         }
 623
 624         if (radio_work_pending(wpa_s, "sme-connect")) {
 625                 /*
 626                  * The previous sme-connect work might no longer be valid due to
 627                  * the fact that the BSS list was updated. In addition, it makes
 628                  * sense to adhere to the 'newer' decision.
 629                  */
 630                 wpa_dbg(wpa_s, MSG_DEBUG,
 631                         "SME: Remove previous pending sme-connect");
 632                 radio_remove_works(wpa_s, "sme-connect", 0);
 633         }
 634
 635         wpas_abort_ongoing_scan(wpa_s);
 636
 637         cwork = os_zalloc(sizeof(*cwork));
 638         if (cwork == NULL)
 639                 return;
 640         cwork->bss = bss;
 641         cwork->ssid = ssid;
 642         cwork->sme = 1;
 643
 644 #ifdef CONFIG_SAE
 645         wpa_s->sme.sae.state = SAE_NOTHING;
 646         wpa_s->sme.sae.send_confirm = 0;
 647         wpa_s->sme.sae_group_index = 0;
 648 #endif /* CONFIG_SAE */
 649
 650         if (radio_add_work(wpa_s, bss->freq, "sme-connect", 1,
 651                            sme_auth_start_cb, cwork) < 0)
 652                 wpas_connect_work_free(cwork);
 653 }
 654
 655
 656 #ifdef CONFIG_SAE
 657
 658 static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
 659                         u16 status_code, const u8 *data, size_t len)
 660 {
 661         int *groups;
 662
 663         wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
 664                 "status code %u", auth_transaction, status_code);
 665
 666         if (auth_transaction == 1 &&
 667             status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
 668             wpa_s->sme.sae.state == SAE_COMMITTED &&
 669             wpa_s->current_bss && wpa_s->current_ssid) {
 670                 int default_groups[] = { 19, 20, 21, 25, 26, 0 };
 671                 u16 group;
 672
 673                 groups = wpa_s->conf->sae_groups;
 674                 if (!groups || groups[0] <= 0)
 675                         groups = default_groups;
 676
 677                 if (len < sizeof(le16)) {
 678                         wpa_dbg(wpa_s, MSG_DEBUG,
 679                                 "SME: Too short SAE anti-clogging token request");
 680                         return -1;
 681                 }
 682                 group = WPA_GET_LE16(data);
 683                 wpa_dbg(wpa_s, MSG_DEBUG,
 684                         "SME: SAE anti-clogging token requested (group %u)",
 685                         group);
 686                 if (sae_group_allowed(&wpa_s->sme.sae, groups, group) !=
 687                     WLAN_STATUS_SUCCESS) {
 688                         wpa_dbg(wpa_s, MSG_ERROR,
 689                                 "SME: SAE group %u of anti-clogging request is invalid",
 690                                 group);
 691                         return -1;
 692                 }
 693                 wpabuf_free(wpa_s->sme.sae_token);
 694                 wpa_s->sme.sae_token = wpabuf_alloc_copy(data + sizeof(le16),
 695                                                          len - sizeof(le16));
 696                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 697                                         wpa_s->current_ssid, 1);
 698                 return 0;
 699         }
 700
 701         if (auth_transaction == 1 &&
 702             status_code == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED &&
 703             wpa_s->sme.sae.state == SAE_COMMITTED &&
 704             wpa_s->current_bss && wpa_s->current_ssid) {
 705                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE group not supported");
 706                 wpa_s->sme.sae_group_index++;
 707                 if (sme_set_sae_group(wpa_s) < 0)
 708                         return -1; /* no other groups enabled */
 709                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Try next enabled SAE group");
 710                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 711                                         wpa_s->current_ssid, 1);
 712                 return 0;
 713         }
 714
 715         if (status_code != WLAN_STATUS_SUCCESS)
 716                 return -1;
 717
 718         if (auth_transaction == 1) {
 719                 u16 res;
 720
 721                 groups = wpa_s->conf->sae_groups;
 722
 723                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
 724                 if (wpa_s->current_bss == NULL ||
 725                     wpa_s->current_ssid == NULL)
 726                         return -1;
 727                 if (wpa_s->sme.sae.state != SAE_COMMITTED)
 728                         return -1;
 729                 if (groups && groups[0] <= 0)
 730                         groups = NULL;
 731                 res = sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL,
 732                                        groups);
 733                 if (res == SAE_SILENTLY_DISCARD) {
 734                         wpa_printf(MSG_DEBUG,
 735                                    "SAE: Drop commit message due to reflection attack");
 736                         return 0;
 737                 }
 738                 if (res != WLAN_STATUS_SUCCESS)
 739                         return -1;
 740
 741                 if (sae_process_commit(&wpa_s->sme.sae) < 0) {
 742                         wpa_printf(MSG_DEBUG, "SAE: Failed to process peer "
 743                                    "commit");
 744                         return -1;
 745                 }
 746
 747                 wpabuf_free(wpa_s->sme.sae_token);
 748                 wpa_s->sme.sae_token = NULL;
 749                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 750                                         wpa_s->current_ssid, 0);
 751                 return 0;
 752         } else if (auth_transaction == 2) {
 753                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
 754                 if (wpa_s->sme.sae.state != SAE_CONFIRMED)
 755                         return -1;
 756                 if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0)
 757                         return -1;
 758                 wpa_s->sme.sae.state = SAE_ACCEPTED;
 759                 sae_clear_temp_data(&wpa_s->sme.sae);
 760                 return 1;
 761         }
 762
 763         return -1;
 764 }
 765 #endif /* CONFIG_SAE */
 766
 767
 768 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
 769 {
 770         struct wpa_ssid *ssid = wpa_s->current_ssid;
 771
 772         if (ssid == NULL) {
 773                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 774                         "when network is not selected");
 775                 return;
 776         }
 777
 778         if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
 779                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 780                         "when not in authenticating state");
 781                 return;
 782         }
 783
 784         if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
 785                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
 786                         "unexpected peer " MACSTR,
 787                         MAC2STR(data->auth.peer));
 788                 return;
 789         }
 790
 791         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
 792                 " auth_type=%d auth_transaction=%d status_code=%d",
 793                 MAC2STR(data->auth.peer), data->auth.auth_type,
 794                 data->auth.auth_transaction, data->auth.status_code);
 795         wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
 796                     data->auth.ies, data->auth.ies_len);
 797
 798         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 799
 800 #ifdef CONFIG_SAE
 801         if (data->auth.auth_type == WLAN_AUTH_SAE) {
 802                 int res;
 803                 res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
 804                                    data->auth.status_code, data->auth.ies,
 805                                    data->auth.ies_len);
 806                 if (res < 0) {
 807                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 808                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 809
 810                 }
 811                 if (res != 1)
 812                         return;
 813
 814                 wpa_printf(MSG_DEBUG, "SME: SAE completed - setting PMK for "
 815                            "4-way handshake");
 816                 wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN,
 817                                wpa_s->pending_bssid);
 818         }
 819 #endif /* CONFIG_SAE */
 820
 821         if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
 822                 char *ie_txt = NULL;
 823
 824                 if (data->auth.ies && data->auth.ies_len) {
 825                         size_t buflen = 2 * data->auth.ies_len + 1;
 826                         ie_txt = os_malloc(buflen);
 827                         if (ie_txt) {
 828                                 wpa_snprintf_hex(ie_txt, buflen, data->auth.ies,
 829                                                  data->auth.ies_len);
 830                         }
 831                 }
 832                 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_AUTH_REJECT MACSTR
 833                         " auth_type=%u auth_transaction=%u status_code=%u ie=%s",
 834                         MAC2STR(data->auth.peer), data->auth.auth_type,
 835                         data->auth.auth_transaction, data->auth.status_code,
 836                         ie_txt);
 837                 os_free(ie_txt);
 838
 839                 if (data->auth.status_code !=
 840                     WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
 841                     wpa_s->sme.auth_alg == data->auth.auth_type ||
 842                     wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
 843                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 844                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 845                         return;
 846                 }
 847
 848                 wpas_connect_work_done(wpa_s);
 849
 850                 switch (data->auth.auth_type) {
 851                 case WLAN_AUTH_OPEN:
 852                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 853
 854                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
 855                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 856                                                  wpa_s->current_ssid);
 857                         return;
 858
 859                 case WLAN_AUTH_SHARED_KEY:
 860                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
 861
 862                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
 863                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 864                                                  wpa_s->current_ssid);
 865                         return;
 866
 867                 default:
 868                         return;
 869                 }
 870         }
 871
 872 #ifdef CONFIG_IEEE80211R
 873         if (data->auth.auth_type == WLAN_AUTH_FT) {
 874                 if (wpa_ft_process_response(wpa_s->wpa, data->auth.ies,
 875                                             data->auth.ies_len, 0,
 876                                             data->auth.peer, NULL, 0) < 0) {
 877                         wpa_dbg(wpa_s, MSG_DEBUG,
 878                                 "SME: FT Authentication response processing failed");
 879                         wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "bssid="
 880                                 MACSTR
 881                                 " reason=%d locally_generated=1",
 882                                 MAC2STR(wpa_s->pending_bssid),
 883                                 WLAN_REASON_DEAUTH_LEAVING);
 884                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 885                         wpa_supplicant_mark_disassoc(wpa_s);
 886                         return;
 887                 }
 888         }
 889 #endif /* CONFIG_IEEE80211R */
 890
 891         sme_associate(wpa_s, ssid->mode, data->auth.peer,
 892                       data->auth.auth_type);
 893 }
 894
 895
 896 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
 897                    const u8 *bssid, u16 auth_type)
 898 {
 899         struct wpa_driver_associate_params params;
 900         struct ieee802_11_elems elems;
 901 #ifdef CONFIG_HT_OVERRIDES
 902         struct ieee80211_ht_capabilities htcaps;
 903         struct ieee80211_ht_capabilities htcaps_mask;
 904 #endif /* CONFIG_HT_OVERRIDES */
 905 #ifdef CONFIG_VHT_OVERRIDES
 906         struct ieee80211_vht_capabilities vhtcaps;
 907         struct ieee80211_vht_capabilities vhtcaps_mask;
 908 #endif /* CONFIG_VHT_OVERRIDES */
 909
 910         os_memset(&params, 0, sizeof(params));
 911         params.bssid = bssid;
 912         params.ssid = wpa_s->sme.ssid;
 913         params.ssid_len = wpa_s->sme.ssid_len;
 914         params.freq.freq = wpa_s->sme.freq;
 915         params.bg_scan_period = wpa_s->current_ssid ?
 916                 wpa_s->current_ssid->bg_scan_period : -1;
 917         params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
 918                 wpa_s->sme.assoc_req_ie : NULL;
 919         params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
 920         params.pairwise_suite = wpa_s->pairwise_cipher;
 921         params.group_suite = wpa_s->group_cipher;
 922         params.key_mgmt_suite = wpa_s->key_mgmt;
 923         params.wpa_proto = wpa_s->wpa_proto;
 924 #ifdef CONFIG_HT_OVERRIDES
 925         os_memset(&htcaps, 0, sizeof(htcaps));
 926         os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
 927         params.htcaps = (u8 *) &htcaps;
 928         params.htcaps_mask = (u8 *) &htcaps_mask;
 929         wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, &params);
 930 #endif /* CONFIG_HT_OVERRIDES */
 931 #ifdef CONFIG_VHT_OVERRIDES
 932         os_memset(&vhtcaps, 0, sizeof(vhtcaps));
 933         os_memset(&vhtcaps_mask, 0, sizeof(vhtcaps_mask));
 934         params.vhtcaps = &vhtcaps;
 935         params.vhtcaps_mask = &vhtcaps_mask;
 936         wpa_supplicant_apply_vht_overrides(wpa_s, wpa_s->current_ssid, &params);
 937 #endif /* CONFIG_VHT_OVERRIDES */
 938 #ifdef CONFIG_IEEE80211R
 939         if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
 940                 params.wpa_ie = wpa_s->sme.ft_ies;
 941                 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
 942         }
 943 #endif /* CONFIG_IEEE80211R */
 944         params.mode = mode;
 945         params.mgmt_frame_protection = wpa_s->sme.mfp;
 946         params.rrm_used = wpa_s->rrm.rrm_used;
 947         if (wpa_s->sme.prev_bssid_set)
 948                 params.prev_bssid = wpa_s->sme.prev_bssid;
 949
 950         wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
 951                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 952                 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
 953                 params.freq.freq);
 954
 955         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
 956
 957         if (params.wpa_ie == NULL ||
 958             ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
 959             < 0) {
 960                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
 961                 os_memset(&elems, 0, sizeof(elems));
 962         }
 963         if (elems.rsn_ie) {
 964                 params.wpa_proto = WPA_PROTO_RSN;
 965                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
 966                                         elems.rsn_ie_len + 2);
 967         } else if (elems.wpa_ie) {
 968                 params.wpa_proto = WPA_PROTO_WPA;
 969                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
 970                                         elems.wpa_ie_len + 2);
 971         } else if (elems.osen) {
 972                 params.wpa_proto = WPA_PROTO_OSEN;
 973                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.osen - 2,
 974                                         elems.osen_len + 2);
 975         } else
 976                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 977         if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
 978                 params.p2p = 1;
 979
 980         if (wpa_s->parent->set_sta_uapsd)
 981                 params.uapsd = wpa_s->parent->sta_uapsd;
 982         else
 983                 params.uapsd = -1;
 984
 985         if (wpa_drv_associate(wpa_s, &params) < 0) {
 986                 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
 987                         "driver failed");
 988                 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 989                 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 990                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 991                 return;
 992         }
 993
 994         eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
 995                                NULL);
 996 }
 997
 998
 999 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
1000                       const u8 *ies, size_t ies_len)
1001 {
1002         if (md == NULL || ies == NULL) {
1003                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
1004                 os_free(wpa_s->sme.ft_ies);
1005                 wpa_s->sme.ft_ies = NULL;
1006                 wpa_s->sme.ft_ies_len = 0;
1007                 wpa_s->sme.ft_used = 0;
1008                 return 0;
1009         }
1010
1011         os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
1012         wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
1013         os_free(wpa_s->sme.ft_ies);
1014         wpa_s->sme.ft_ies = os_malloc(ies_len);
1015         if (wpa_s->sme.ft_ies == NULL)
1016                 return -1;
1017         os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
1018         wpa_s->sme.ft_ies_len = ies_len;
1019         return 0;
1020 }
1021
1022
1023 static void sme_deauth(struct wpa_supplicant *wpa_s)
1024 {
1025         int bssid_changed;
1026
1027         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
1028
1029         if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
1030                                    WLAN_REASON_DEAUTH_LEAVING) < 0) {
1031                 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
1032                         "failed");
1033         }
1034         wpa_s->sme.prev_bssid_set = 0;
1035
1036         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1037         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
1038         os_memset(wpa_s->bssid, 0, ETH_ALEN);
1039         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1040         if (bssid_changed)
1041                 wpas_notify_bssid_changed(wpa_s);
1042 }
1043
1044
1045 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
1046                             union wpa_event_data *data)
1047 {
1048         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
1049                 "status code %d", MAC2STR(wpa_s->pending_bssid),
1050                 data->assoc_reject.status_code);
1051
1052         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1053
1054 #ifdef CONFIG_SAE
1055         if (wpa_s->sme.sae_pmksa_caching && wpa_s->current_ssid &&
1056             wpa_key_mgmt_sae(wpa_s->current_ssid->key_mgmt)) {
1057                 wpa_dbg(wpa_s, MSG_DEBUG,
1058                         "PMKSA caching attempt rejected - drop PMKSA cache entry and fall back to SAE authentication");
1059                 wpa_sm_aborted_cached(wpa_s->wpa);
1060                 wpa_sm_pmksa_cache_flush(wpa_s->wpa, wpa_s->current_ssid);
1061                 if (wpa_s->current_bss) {
1062                         struct wpa_bss *bss = wpa_s->current_bss;
1063                         struct wpa_ssid *ssid = wpa_s->current_ssid;
1064
1065                         wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
1066                                                WLAN_REASON_DEAUTH_LEAVING);
1067                         wpas_connect_work_done(wpa_s);
1068                         wpa_supplicant_mark_disassoc(wpa_s);
1069                         wpa_supplicant_connect(wpa_s, bss, ssid);
1070                         return;
1071                 }
1072         }
1073 #endif /* CONFIG_SAE */
1074
1075         /*
1076          * For now, unconditionally terminate the previous authentication. In
1077          * theory, this should not be needed, but mac80211 gets quite confused
1078          * if the authentication is left pending.. Some roaming cases might
1079          * benefit from using the previous authentication, so this could be
1080          * optimized in the future.
1081          */
1082         sme_deauth(wpa_s);
1083 }
1084
1085
1086 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
1087                               union wpa_event_data *data)
1088 {
1089         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
1090         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1091         wpa_supplicant_mark_disassoc(wpa_s);
1092 }
1093
1094
1095 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
1096                                union wpa_event_data *data)
1097 {
1098         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
1099         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1100         wpa_supplicant_mark_disassoc(wpa_s);
1101 }
1102
1103
1104 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
1105                         struct disassoc_info *info)
1106 {
1107         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
1108         if (wpa_s->sme.prev_bssid_set) {
1109                 /*
1110                  * cfg80211/mac80211 can get into somewhat confused state if
1111                  * the AP only disassociates us and leaves us in authenticated
1112                  * state. For now, force the state to be cleared to avoid
1113                  * confusing errors if we try to associate with the AP again.
1114                  */
1115                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
1116                         "driver state");
1117                 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
1118                                        WLAN_REASON_DEAUTH_LEAVING);
1119         }
1120 }
1121
1122
1123 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
1124 {
1125         struct wpa_supplicant *wpa_s = eloop_ctx;
1126         if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
1127                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
1128                 sme_deauth(wpa_s);
1129         }
1130 }
1131
1132
1133 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
1134 {
1135         struct wpa_supplicant *wpa_s = eloop_ctx;
1136         if (wpa_s->wpa_state == WPA_ASSOCIATING) {
1137                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
1138                 sme_deauth(wpa_s);
1139         }
1140 }
1141
1142
1143 void sme_state_changed(struct wpa_supplicant *wpa_s)
1144 {
1145         /* Make sure timers are cleaned up appropriately. */
1146         if (wpa_s->wpa_state != WPA_ASSOCIATING)
1147                 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1148         if (wpa_s->wpa_state != WPA_AUTHENTICATING)
1149                 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1150 }
1151
1152
1153 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
1154                                        const u8 *prev_pending_bssid)
1155 {
1156         /*
1157          * mac80211-workaround to force deauth on failed auth cmd,
1158          * requires us to remain in authenticating state to allow the
1159          * second authentication attempt to be continued properly.
1160          */
1161         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
1162                 "to proceed after disconnection event");
1163         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
1164         os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
1165
1166         /*
1167          * Re-arm authentication timer in case auth fails for whatever reason.
1168          */
1169         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1170         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
1171                                NULL);
1172 }
1173
1174
1175 void sme_clear_on_disassoc(struct wpa_supplicant *wpa_s)
1176 {
1177         wpa_s->sme.prev_bssid_set = 0;
1178 #ifdef CONFIG_SAE
1179         wpabuf_free(wpa_s->sme.sae_token);
1180         wpa_s->sme.sae_token = NULL;
1181         sae_clear_data(&wpa_s->sme.sae);
1182 #endif /* CONFIG_SAE */
1183 #ifdef CONFIG_IEEE80211R
1184         if (wpa_s->sme.ft_ies)
1185                 sme_update_ft_ies(wpa_s, NULL, NULL, 0);
1186 #endif /* CONFIG_IEEE80211R */
1187 }
1188
1189
1190 void sme_deinit(struct wpa_supplicant *wpa_s)
1191 {
1192         os_free(wpa_s->sme.ft_ies);
1193         wpa_s->sme.ft_ies = NULL;
1194         wpa_s->sme.ft_ies_len = 0;
1195 #ifdef CONFIG_IEEE80211W
1196         sme_stop_sa_query(wpa_s);
1197 #endif /* CONFIG_IEEE80211W */
1198         sme_clear_on_disassoc(wpa_s);
1199
1200         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1201         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1202         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1203 }
1204
1205
1206 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
1207                                    const u8 *chan_list, u8 num_channels,
1208                                    u8 num_intol)
1209 {
1210         struct ieee80211_2040_bss_coex_ie *bc_ie;
1211         struct ieee80211_2040_intol_chan_report *ic_report;
1212         struct wpabuf *buf;
1213
1214         wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR
1215                    " (num_channels=%u num_intol=%u)",
1216                    MAC2STR(wpa_s->bssid), num_channels, num_intol);
1217         wpa_hexdump(MSG_DEBUG, "SME: 20/40 BSS Intolerant Channels",
1218                     chan_list, num_channels);
1219
1220         buf = wpabuf_alloc(2 + /* action.category + action_code */
1221                            sizeof(struct ieee80211_2040_bss_coex_ie) +
1222                            sizeof(struct ieee80211_2040_intol_chan_report) +
1223                            num_channels);
1224         if (buf == NULL)
1225                 return;
1226
1227         wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
1228         wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
1229
1230         bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
1231         bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
1232         bc_ie->length = 1;
1233         if (num_intol)
1234                 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
1235
1236         if (num_channels > 0) {
1237                 ic_report = wpabuf_put(buf, sizeof(*ic_report));
1238                 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
1239                 ic_report->length = num_channels + 1;
1240                 ic_report->op_class = 0;
1241                 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
1242                           num_channels);
1243         }
1244
1245         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1246                                 wpa_s->own_addr, wpa_s->bssid,
1247                                 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
1248                 wpa_msg(wpa_s, MSG_INFO,
1249                         "SME: Failed to send 20/40 BSS Coexistence frame");
1250         }
1251
1252         wpabuf_free(buf);
1253 }
1254
1255
1256 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
1257 {
1258         struct wpa_bss *bss;
1259         const u8 *ie;
1260         u16 ht_cap;
1261         u8 chan_list[P2P_MAX_CHANNELS], channel;
1262         u8 num_channels = 0, num_intol = 0, i;
1263
1264         if (!wpa_s->sme.sched_obss_scan)
1265                 return 0;
1266
1267         wpa_s->sme.sched_obss_scan = 0;
1268         if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
1269                 return 1;
1270
1271         /*
1272          * Check whether AP uses regulatory triplet or channel triplet in
1273          * country info. Right now the operating class of the BSS channel
1274          * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
1275          * based on the assumption that operating class triplet is not used in
1276          * beacon frame. If the First Channel Number/Operating Extension
1277          * Identifier octet has a positive integer value of 201 or greater,
1278          * then its operating class triplet.
1279          *
1280          * TODO: If Supported Operating Classes element is present in beacon
1281          * frame, have to lookup operating class in Annex E and fill them in
1282          * 2040 coex frame.
1283          */
1284         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
1285         if (ie && (ie[1] >= 6) && (ie[5] >= 201))
1286                 return 1;
1287
1288         os_memset(chan_list, 0, sizeof(chan_list));
1289
1290         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1291                 /* Skip other band bss */
1292                 enum hostapd_hw_mode mode;
1293                 mode = ieee80211_freq_to_chan(bss->freq, &channel);
1294                 if (mode != HOSTAPD_MODE_IEEE80211G &&
1295                     mode != HOSTAPD_MODE_IEEE80211B)
1296                         continue;
1297
1298                 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
1299                 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
1300                 wpa_printf(MSG_DEBUG, "SME OBSS scan BSS " MACSTR
1301                            " freq=%u chan=%u ht_cap=0x%x",
1302                            MAC2STR(bss->bssid), bss->freq, channel, ht_cap);
1303
1304                 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
1305                         if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
1306                                 num_intol++;
1307
1308                         /* Check whether the channel is already considered */
1309                         for (i = 0; i < num_channels; i++) {
1310                                 if (channel == chan_list[i])
1311                                         break;
1312                         }
1313                         if (i != num_channels)
1314                                 continue;
1315
1316                         chan_list[num_channels++] = channel;
1317                 }
1318         }
1319
1320         sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
1321         return 1;
1322 }
1323
1324
1325 static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
1326                                           u16 num_modes,
1327                                           enum hostapd_hw_mode mode)
1328 {
1329         u16 i;
1330
1331         for (i = 0; i < num_modes; i++) {
1332                 if (modes[i].mode == mode)
1333                         return &modes[i];
1334         }
1335
1336         return NULL;
1337 }
1338
1339
1340 static void wpa_obss_scan_freqs_list(struct wpa_supplicant *wpa_s,
1341                                      struct wpa_driver_scan_params *params)
1342 {
1343         /* Include only affected channels */
1344         struct hostapd_hw_modes *mode;
1345         int count, i;
1346         int start, end;
1347
1348         mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes,
1349                         HOSTAPD_MODE_IEEE80211G);
1350         if (mode == NULL) {
1351                 /* No channels supported in this band - use empty list */
1352                 params->freqs = os_zalloc(sizeof(int));
1353                 return;
1354         }
1355
1356         if (wpa_s->sme.ht_sec_chan == HT_SEC_CHAN_UNKNOWN &&
1357             wpa_s->current_bss) {
1358                 const u8 *ie;
1359
1360                 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_OPERATION);
1361                 if (ie && ie[1] >= 2) {
1362                         u8 o;
1363
1364                         o = ie[3] & HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK;
1365                         if (o == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
1366                                 wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_ABOVE;
1367                         else if (o == HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
1368                                 wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_BELOW;
1369                 }
1370         }
1371
1372         start = wpa_s->assoc_freq - 10;
1373         end = wpa_s->assoc_freq + 10;
1374         switch (wpa_s->sme.ht_sec_chan) {
1375         case HT_SEC_CHAN_UNKNOWN:
1376                 /* HT40+ possible on channels 1..9 */
1377                 if (wpa_s->assoc_freq <= 2452)
1378                         start -= 20;
1379                 /* HT40- possible on channels 5-13 */
1380                 if (wpa_s->assoc_freq >= 2432)
1381                         end += 20;
1382                 break;
1383         case HT_SEC_CHAN_ABOVE:
1384                 end += 20;
1385                 break;
1386         case HT_SEC_CHAN_BELOW:
1387                 start -= 20;
1388                 break;
1389         }
1390         wpa_printf(MSG_DEBUG,
1391                    "OBSS: assoc_freq %d possible affected range %d-%d",
1392                    wpa_s->assoc_freq, start, end);
1393
1394         params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
1395         if (params->freqs == NULL)
1396                 return;
1397         for (count = 0, i = 0; i < mode->num_channels; i++) {
1398                 int freq;
1399
1400                 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
1401                         continue;
1402                 freq = mode->channels[i].freq;
1403                 if (freq - 10 >= end || freq + 10 <= start)
1404                         continue; /* not affected */
1405                 params->freqs[count++] = freq;
1406         }
1407 }
1408
1409
1410 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1411 {
1412         struct wpa_supplicant *wpa_s = eloop_ctx;
1413         struct wpa_driver_scan_params params;
1414
1415         if (!wpa_s->current_bss) {
1416                 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
1417                 return;
1418         }
1419
1420         os_memset(&params, 0, sizeof(params));
1421         wpa_obss_scan_freqs_list(wpa_s, &params);
1422         params.low_priority = 1;
1423         wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
1424
1425         if (wpa_supplicant_trigger_scan(wpa_s, &params))
1426                 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
1427         else
1428                 wpa_s->sme.sched_obss_scan = 1;
1429         os_free(params.freqs);
1430
1431         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1432                                sme_obss_scan_timeout, wpa_s, NULL);
1433 }
1434
1435
1436 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
1437 {
1438         const u8 *ie;
1439         struct wpa_bss *bss = wpa_s->current_bss;
1440         struct wpa_ssid *ssid = wpa_s->current_ssid;
1441         struct hostapd_hw_modes *hw_mode = NULL;
1442         int i;
1443
1444         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1445         wpa_s->sme.sched_obss_scan = 0;
1446         wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_UNKNOWN;
1447         if (!enable)
1448                 return;
1449
1450         /*
1451          * Schedule OBSS scan if driver is using station SME in wpa_supplicant
1452          * or it expects OBSS scan to be performed by wpa_supplicant.
1453          */
1454         if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
1455               (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
1456             ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
1457                 return;
1458
1459         if (!wpa_s->hw.modes)
1460                 return;
1461
1462         /* only HT caps in 11g mode are relevant */
1463         for (i = 0; i < wpa_s->hw.num_modes; i++) {
1464                 hw_mode = &wpa_s->hw.modes[i];
1465                 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
1466                         break;
1467         }
1468
1469         /* Driver does not support HT40 for 11g or doesn't have 11g. */
1470         if (i == wpa_s->hw.num_modes || !hw_mode ||
1471             !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1472                 return;
1473
1474         if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
1475                 return; /* Not associated on 2.4 GHz band */
1476
1477         /* Check whether AP supports HT40 */
1478         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
1479         if (!ie || ie[1] < 2 ||
1480             !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1481                 return; /* AP does not support HT40 */
1482
1483         ie = wpa_bss_get_ie(wpa_s->current_bss,
1484                             WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
1485         if (!ie || ie[1] < 14)
1486                 return; /* AP does not request OBSS scans */
1487
1488         wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
1489         if (wpa_s->sme.obss_scan_int < 10) {
1490                 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
1491                            "replaced with the minimum 10 sec",
1492                            wpa_s->sme.obss_scan_int);
1493                 wpa_s->sme.obss_scan_int = 10;
1494         }
1495         wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
1496                    wpa_s->sme.obss_scan_int);
1497         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1498                                sme_obss_scan_timeout, wpa_s, NULL);
1499 }
1500
1501
1502 #ifdef CONFIG_IEEE80211W
1503
1504 static const unsigned int sa_query_max_timeout = 1000;
1505 static const unsigned int sa_query_retry_timeout = 201;
1506
1507 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
1508 {
1509         u32 tu;
1510         struct os_reltime now, passed;
1511         os_get_reltime(&now);
1512         os_reltime_sub(&now, &wpa_s->sme.sa_query_start, &passed);
1513         tu = (passed.sec * 1000000 + passed.usec) / 1024;
1514         if (sa_query_max_timeout < tu) {
1515                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
1516                 sme_stop_sa_query(wpa_s);
1517                 wpa_supplicant_deauthenticate(
1518                         wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
1519                 return 1;
1520         }
1521
1522         return 0;
1523 }
1524
1525
1526 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
1527                                   const u8 *trans_id)
1528 {
1529         u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
1530         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
1531                 MACSTR, MAC2STR(wpa_s->bssid));
1532         wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
1533                     trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1534         req[0] = WLAN_ACTION_SA_QUERY;
1535         req[1] = WLAN_SA_QUERY_REQUEST;
1536         os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1537         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1538                                 wpa_s->own_addr, wpa_s->bssid,
1539                                 req, sizeof(req), 0) < 0)
1540                 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
1541                         "Request");
1542 }
1543
1544
1545 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
1546 {
1547         struct wpa_supplicant *wpa_s = eloop_ctx;
1548         unsigned int timeout, sec, usec;
1549         u8 *trans_id, *nbuf;
1550
1551         if (wpa_s->sme.sa_query_count > 0 &&
1552             sme_check_sa_query_timeout(wpa_s))
1553                 return;
1554
1555         nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
1556                                 wpa_s->sme.sa_query_count + 1,
1557                                 WLAN_SA_QUERY_TR_ID_LEN);
1558         if (nbuf == NULL)
1559                 return;
1560         if (wpa_s->sme.sa_query_count == 0) {
1561                 /* Starting a new SA Query procedure */
1562                 os_get_reltime(&wpa_s->sme.sa_query_start);
1563         }
1564         trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
1565         wpa_s->sme.sa_query_trans_id = nbuf;
1566         wpa_s->sme.sa_query_count++;
1567
1568         if (os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN) < 0) {
1569                 wpa_printf(MSG_DEBUG, "Could not generate SA Query ID");
1570                 return;
1571         }
1572
1573         timeout = sa_query_retry_timeout;
1574         sec = ((timeout / 1000) * 1024) / 1000;
1575         usec = (timeout % 1000) * 1024;
1576         eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
1577
1578         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
1579                 wpa_s->sme.sa_query_count);
1580
1581         sme_send_sa_query_req(wpa_s, trans_id);
1582 }
1583
1584
1585 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
1586 {
1587         sme_sa_query_timer(wpa_s, NULL);
1588 }
1589
1590
1591 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
1592 {
1593         eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
1594         os_free(wpa_s->sme.sa_query_trans_id);
1595         wpa_s->sme.sa_query_trans_id = NULL;
1596         wpa_s->sme.sa_query_count = 0;
1597 }
1598
1599
1600 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1601                                  const u8 *da, u16 reason_code)
1602 {
1603         struct wpa_ssid *ssid;
1604         struct os_reltime now;
1605
1606         if (wpa_s->wpa_state != WPA_COMPLETED)
1607                 return;
1608         ssid = wpa_s->current_ssid;
1609         if (wpas_get_ssid_pmf(wpa_s, ssid) == NO_MGMT_FRAME_PROTECTION)
1610                 return;
1611         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1612                 return;
1613         if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1614             reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1615                 return;
1616         if (wpa_s->sme.sa_query_count > 0)
1617                 return;
1618
1619         os_get_reltime(&now);
1620         if (wpa_s->sme.last_unprot_disconnect.sec &&
1621             !os_reltime_expired(&now, &wpa_s->sme.last_unprot_disconnect, 10))
1622                 return; /* limit SA Query procedure frequency */
1623         wpa_s->sme.last_unprot_disconnect = now;
1624
1625         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1626                 "possible AP/STA state mismatch - trigger SA Query");
1627         sme_start_sa_query(wpa_s);
1628 }
1629
1630
1631 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1632                      const u8 *data, size_t len)
1633 {
1634         int i;
1635
1636         if (wpa_s->sme.sa_query_trans_id == NULL ||
1637             len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1638             data[0] != WLAN_SA_QUERY_RESPONSE)
1639                 return;
1640         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1641                 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1642
1643         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1644                 return;
1645
1646         for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1647                 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1648                               i * WLAN_SA_QUERY_TR_ID_LEN,
1649                               data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1650                         break;
1651         }
1652
1653         if (i >= wpa_s->sme.sa_query_count) {
1654                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1655                         "transaction identifier found");
1656                 return;
1657         }
1658
1659         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1660                 "from " MACSTR, MAC2STR(sa));
1661         sme_stop_sa_query(wpa_s);
1662 }
1663
1664 #endif /* CONFIG_IEEE80211W */