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 #ifdef CONFIG_MBO
 212         const u8 *mbo;
 213 #endif /* CONFIG_MBO */
 214
 215         if (bss == NULL) {
 216                 wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for "
 217                         "the network");
 218                 wpas_connect_work_done(wpa_s);
 219                 return;
 220         }
 221
 222         skip_auth = wpa_s->conf->reassoc_same_bss_optim &&
 223                 wpa_s->reassoc_same_bss;
 224         wpa_s->current_bss = bss;
 225
 226         os_memset(&params, 0, sizeof(params));
 227         wpa_s->reassociate = 0;
 228
 229         params.freq = bss->freq;
 230         params.bssid = bss->bssid;
 231         params.ssid = bss->ssid;
 232         params.ssid_len = bss->ssid_len;
 233         params.p2p = ssid->p2p_group;
 234
 235         if (wpa_s->sme.ssid_len != params.ssid_len ||
 236             os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
 237                 wpa_s->sme.prev_bssid_set = 0;
 238
 239         wpa_s->sme.freq = params.freq;
 240         os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
 241         wpa_s->sme.ssid_len = params.ssid_len;
 242
 243         params.auth_alg = WPA_AUTH_ALG_OPEN;
 244 #ifdef IEEE8021X_EAPOL
 245         if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
 246                 if (ssid->leap) {
 247                         if (ssid->non_leap == 0)
 248                                 params.auth_alg = WPA_AUTH_ALG_LEAP;
 249                         else
 250                                 params.auth_alg |= WPA_AUTH_ALG_LEAP;
 251                 }
 252         }
 253 #endif /* IEEE8021X_EAPOL */
 254         wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
 255                 params.auth_alg);
 256         if (ssid->auth_alg) {
 257                 params.auth_alg = ssid->auth_alg;
 258                 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
 259                         "0x%x", params.auth_alg);
 260         }
 261 #ifdef CONFIG_SAE
 262         wpa_s->sme.sae_pmksa_caching = 0;
 263         if (wpa_key_mgmt_sae(ssid->key_mgmt)) {
 264                 const u8 *rsn;
 265                 struct wpa_ie_data ied;
 266
 267                 rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 268                 if (!rsn) {
 269                         wpa_dbg(wpa_s, MSG_DEBUG,
 270                                 "SAE enabled, but target BSS does not advertise RSN");
 271                 } else if (wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0 &&
 272                            wpa_key_mgmt_sae(ied.key_mgmt)) {
 273                         wpa_dbg(wpa_s, MSG_DEBUG, "Using SAE auth_alg");
 274                         params.auth_alg = WPA_AUTH_ALG_SAE;
 275                 } else {
 276                         wpa_dbg(wpa_s, MSG_DEBUG,
 277                                 "SAE enabled, but target BSS does not advertise SAE AKM for RSN");
 278                 }
 279         }
 280 #endif /* CONFIG_SAE */
 281
 282         for (i = 0; i < NUM_WEP_KEYS; i++) {
 283                 if (ssid->wep_key_len[i])
 284                         params.wep_key[i] = ssid->wep_key[i];
 285                 params.wep_key_len[i] = ssid->wep_key_len[i];
 286         }
 287         params.wep_tx_keyidx = ssid->wep_tx_keyidx;
 288
 289         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 290         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 291         os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
 292         if (bssid_changed)
 293                 wpas_notify_bssid_changed(wpa_s);
 294
 295         if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
 296              wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
 297             wpa_key_mgmt_wpa(ssid->key_mgmt)) {
 298                 int try_opportunistic;
 299                 try_opportunistic = (ssid->proactive_key_caching < 0 ?
 300                                      wpa_s->conf->okc :
 301                                      ssid->proactive_key_caching) &&
 302                         (ssid->proto & WPA_PROTO_RSN);
 303                 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
 304                                             wpa_s->current_ssid,
 305                                             try_opportunistic) == 0)
 306                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol);
 307                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 308                 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
 309                                               wpa_s->sme.assoc_req_ie,
 310                                               &wpa_s->sme.assoc_req_ie_len)) {
 311                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 312                                 "key management and encryption suites");
 313                         wpas_connect_work_done(wpa_s);
 314                         return;
 315                 }
 316         } else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
 317                    wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) {
 318                 /*
 319                  * Both WPA and non-WPA IEEE 802.1X enabled in configuration -
 320                  * use non-WPA since the scan results did not indicate that the
 321                  * AP is using WPA or WPA2.
 322                  */
 323                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 324                 wpa_s->sme.assoc_req_ie_len = 0;
 325         } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
 326                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 327                 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
 328                                               wpa_s->sme.assoc_req_ie,
 329                                               &wpa_s->sme.assoc_req_ie_len)) {
 330                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 331                                 "key management and encryption suites (no "
 332                                 "scan results)");
 333                         wpas_connect_work_done(wpa_s);
 334                         return;
 335                 }
 336 #ifdef CONFIG_WPS
 337         } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 338                 struct wpabuf *wps_ie;
 339                 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
 340                 if (wps_ie && wpabuf_len(wps_ie) <=
 341                     sizeof(wpa_s->sme.assoc_req_ie)) {
 342                         wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
 343                         os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
 344                                   wpa_s->sme.assoc_req_ie_len);
 345                 } else
 346                         wpa_s->sme.assoc_req_ie_len = 0;
 347                 wpabuf_free(wps_ie);
 348                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 349 #endif /* CONFIG_WPS */
 350         } else {
 351                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 352                 wpa_s->sme.assoc_req_ie_len = 0;
 353         }
 354
 355 #ifdef CONFIG_IEEE80211R
 356         ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
 357         if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
 358                 md = ie + 2;
 359         wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
 360         if (md) {
 361                 /* Prepare for the next transition */
 362                 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
 363         }
 364
 365         if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) {
 366                 if (wpa_s->sme.assoc_req_ie_len + 5 <
 367                     sizeof(wpa_s->sme.assoc_req_ie)) {
 368                         struct rsn_mdie *mdie;
 369                         u8 *pos = wpa_s->sme.assoc_req_ie +
 370                                 wpa_s->sme.assoc_req_ie_len;
 371                         *pos++ = WLAN_EID_MOBILITY_DOMAIN;
 372                         *pos++ = sizeof(*mdie);
 373                         mdie = (struct rsn_mdie *) pos;
 374                         os_memcpy(mdie->mobility_domain, md,
 375                                   MOBILITY_DOMAIN_ID_LEN);
 376                         mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
 377                         wpa_s->sme.assoc_req_ie_len += 5;
 378                 }
 379
 380                 if (wpa_s->sme.ft_used &&
 381                     os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
 382                     wpa_sm_has_ptk(wpa_s->wpa)) {
 383                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT "
 384                                 "over-the-air");
 385                         params.auth_alg = WPA_AUTH_ALG_FT;
 386                         params.ie = wpa_s->sme.ft_ies;
 387                         params.ie_len = wpa_s->sme.ft_ies_len;
 388                 }
 389         }
 390 #endif /* CONFIG_IEEE80211R */
 391
 392 #ifdef CONFIG_IEEE80211W
 393         wpa_s->sme.mfp = wpas_get_ssid_pmf(wpa_s, ssid);
 394         if (wpa_s->sme.mfp != NO_MGMT_FRAME_PROTECTION) {
 395                 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 396                 struct wpa_ie_data _ie;
 397                 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
 398                     _ie.capabilities &
 399                     (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
 400                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
 401                                 "MFP: require MFP");
 402                         wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
 403                 }
 404         }
 405 #endif /* CONFIG_IEEE80211W */
 406
 407 #ifdef CONFIG_P2P
 408         if (wpa_s->global->p2p) {
 409                 u8 *pos;
 410                 size_t len;
 411                 int res;
 412                 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
 413                 len = sizeof(wpa_s->sme.assoc_req_ie) -
 414                         wpa_s->sme.assoc_req_ie_len;
 415                 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
 416                                             ssid->p2p_group);
 417                 if (res >= 0)
 418                         wpa_s->sme.assoc_req_ie_len += res;
 419         }
 420 #endif /* CONFIG_P2P */
 421
 422 #ifdef CONFIG_FST
 423         if (wpa_s->fst_ies) {
 424                 int fst_ies_len = wpabuf_len(wpa_s->fst_ies);
 425
 426                 if (wpa_s->sme.assoc_req_ie_len + fst_ies_len <=
 427                     sizeof(wpa_s->sme.assoc_req_ie)) {
 428                         os_memcpy(wpa_s->sme.assoc_req_ie +
 429                                   wpa_s->sme.assoc_req_ie_len,
 430                                   wpabuf_head(wpa_s->fst_ies),
 431                                   fst_ies_len);
 432                         wpa_s->sme.assoc_req_ie_len += fst_ies_len;
 433                 }
 434         }
 435 #endif /* CONFIG_FST */
 436
 437         sme_auth_handle_rrm(wpa_s, bss);
 438
 439 #ifdef CONFIG_MBO
 440         mbo = wpa_bss_get_vendor_ie(bss, MBO_IE_VENDOR_TYPE);
 441         if (mbo) {
 442                 int len;
 443
 444                 len = wpas_mbo_supp_op_class_ie(
 445                         wpa_s, bss->freq,
 446                         wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len,
 447                         sizeof(wpa_s->sme.assoc_req_ie) -
 448                         wpa_s->sme.assoc_req_ie_len);
 449                 if (len > 0)
 450                         wpa_s->sme.assoc_req_ie_len += len;
 451         }
 452 #endif /* CONFIG_MBO */
 453
 454         ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab,
 455                                              sizeof(ext_capab));
 456         if (ext_capab_len > 0) {
 457                 u8 *pos = wpa_s->sme.assoc_req_ie;
 458                 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
 459                         pos += 2 + pos[1];
 460                 os_memmove(pos + ext_capab_len, pos,
 461                            wpa_s->sme.assoc_req_ie_len -
 462                            (pos - wpa_s->sme.assoc_req_ie));
 463                 wpa_s->sme.assoc_req_ie_len += ext_capab_len;
 464                 os_memcpy(pos, ext_capab, ext_capab_len);
 465         }
 466
 467 #ifdef CONFIG_HS20
 468         if (is_hs20_network(wpa_s, ssid, bss)) {
 469                 struct wpabuf *hs20;
 470
 471                 hs20 = wpabuf_alloc(20);
 472                 if (hs20) {
 473                         int pps_mo_id = hs20_get_pps_mo_id(wpa_s, ssid);
 474                         size_t len;
 475
 476                         wpas_hs20_add_indication(hs20, pps_mo_id);
 477                         len = sizeof(wpa_s->sme.assoc_req_ie) -
 478                                 wpa_s->sme.assoc_req_ie_len;
 479                         if (wpabuf_len(hs20) <= len) {
 480                                 os_memcpy(wpa_s->sme.assoc_req_ie +
 481                                           wpa_s->sme.assoc_req_ie_len,
 482                                           wpabuf_head(hs20), wpabuf_len(hs20));
 483                                 wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
 484                         }
 485                         wpabuf_free(hs20);
 486                 }
 487         }
 488 #endif /* CONFIG_HS20 */
 489
 490         if (wpa_s->vendor_elem[VENDOR_ELEM_ASSOC_REQ]) {
 491                 struct wpabuf *buf = wpa_s->vendor_elem[VENDOR_ELEM_ASSOC_REQ];
 492                 size_t len;
 493
 494                 len = sizeof(wpa_s->sme.assoc_req_ie) -
 495                         wpa_s->sme.assoc_req_ie_len;
 496                 if (wpabuf_len(buf) <= len) {
 497                         os_memcpy(wpa_s->sme.assoc_req_ie +
 498                                   wpa_s->sme.assoc_req_ie_len,
 499                                   wpabuf_head(buf), wpabuf_len(buf));
 500                         wpa_s->sme.assoc_req_ie_len += wpabuf_len(buf);
 501                 }
 502         }
 503
 504 #ifdef CONFIG_MBO
 505         if (mbo) {
 506                 int len;
 507
 508                 len = wpas_mbo_ie(wpa_s, wpa_s->sme.assoc_req_ie +
 509                                   wpa_s->sme.assoc_req_ie_len,
 510                                   sizeof(wpa_s->sme.assoc_req_ie) -
 511                                   wpa_s->sme.assoc_req_ie_len);
 512                 if (len >= 0)
 513                         wpa_s->sme.assoc_req_ie_len += len;
 514         }
 515 #endif /* CONFIG_MBO */
 516
 517 #ifdef CONFIG_SAE
 518         if (!skip_auth && params.auth_alg == WPA_AUTH_ALG_SAE &&
 519             pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid, ssid, 0) == 0)
 520         {
 521                 wpa_dbg(wpa_s, MSG_DEBUG,
 522                         "PMKSA cache entry found - try to use PMKSA caching instead of new SAE authentication");
 523                 params.auth_alg = WPA_AUTH_ALG_OPEN;
 524                 wpa_s->sme.sae_pmksa_caching = 1;
 525         }
 526
 527         if (!skip_auth && params.auth_alg == WPA_AUTH_ALG_SAE) {
 528                 if (start)
 529                         resp = sme_auth_build_sae_commit(wpa_s, ssid,
 530                                                          bss->bssid);
 531                 else
 532                         resp = sme_auth_build_sae_confirm(wpa_s);
 533                 if (resp == NULL) {
 534                         wpas_connection_failed(wpa_s, bss->bssid);
 535                         return;
 536                 }
 537                 params.sae_data = wpabuf_head(resp);
 538                 params.sae_data_len = wpabuf_len(resp);
 539                 wpa_s->sme.sae.state = start ? SAE_COMMITTED : SAE_CONFIRMED;
 540         }
 541 #endif /* CONFIG_SAE */
 542
 543         wpa_supplicant_cancel_sched_scan(wpa_s);
 544         wpa_supplicant_cancel_scan(wpa_s);
 545
 546         wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
 547                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 548                 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
 549
 550         wpa_clear_keys(wpa_s, bss->bssid);
 551         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 552         old_ssid = wpa_s->current_ssid;
 553         wpa_s->current_ssid = ssid;
 554         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
 555         wpa_supplicant_initiate_eapol(wpa_s);
 556         if (old_ssid != wpa_s->current_ssid)
 557                 wpas_notify_network_changed(wpa_s);
 558
 559 #ifdef CONFIG_P2P
 560         /*
 561          * If multi-channel concurrency is not supported, check for any
 562          * frequency conflict. In case of any frequency conflict, remove the
 563          * least prioritized connection.
 564          */
 565         if (wpa_s->num_multichan_concurrent < 2) {
 566                 int freq, num;
 567                 num = get_shared_radio_freqs(wpa_s, &freq, 1);
 568                 if (num > 0 && freq > 0 && freq != params.freq) {
 569                         wpa_printf(MSG_DEBUG,
 570                                    "Conflicting frequency found (%d != %d)",
 571                                    freq, params.freq);
 572                         if (wpas_p2p_handle_frequency_conflicts(wpa_s,
 573                                                                 params.freq,
 574                                                                 ssid) < 0) {
 575                                 wpas_connection_failed(wpa_s, bss->bssid);
 576                                 wpa_supplicant_mark_disassoc(wpa_s);
 577                                 wpabuf_free(resp);
 578                                 wpas_connect_work_done(wpa_s);
 579                                 return;
 580                         }
 581                 }
 582         }
 583 #endif /* CONFIG_P2P */
 584
 585         if (skip_auth) {
 586                 wpa_msg(wpa_s, MSG_DEBUG,
 587                         "SME: Skip authentication step on reassoc-to-same-BSS");
 588                 wpabuf_free(resp);
 589                 sme_associate(wpa_s, ssid->mode, bss->bssid, WLAN_AUTH_OPEN);
 590                 return;
 591         }
 592
 593
 594         wpa_s->sme.auth_alg = params.auth_alg;
 595         if (wpa_drv_authenticate(wpa_s, &params) < 0) {
 596                 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
 597                         "driver failed");
 598                 wpas_connection_failed(wpa_s, bss->bssid);
 599                 wpa_supplicant_mark_disassoc(wpa_s);
 600                 wpabuf_free(resp);
 601                 wpas_connect_work_done(wpa_s);
 602                 return;
 603         }
 604
 605         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 606                                NULL);
 607
 608         /*
 609          * Association will be started based on the authentication event from
 610          * the driver.
 611          */
 612
 613         wpabuf_free(resp);
 614 }
 615
 616
 617 static void sme_auth_start_cb(struct wpa_radio_work *work, int deinit)
 618 {
 619         struct wpa_connect_work *cwork = work->ctx;
 620         struct wpa_supplicant *wpa_s = work->wpa_s;
 621
 622         if (deinit) {
 623                 if (work->started)
 624                         wpa_s->connect_work = NULL;
 625
 626                 wpas_connect_work_free(cwork);
 627                 return;
 628         }
 629
 630         wpa_s->connect_work = work;
 631
 632         if (cwork->bss_removed ||
 633             !wpas_valid_bss_ssid(wpa_s, cwork->bss, cwork->ssid) ||
 634             wpas_network_disabled(wpa_s, cwork->ssid)) {
 635                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: BSS/SSID entry for authentication not valid anymore - drop connection attempt");
 636                 wpas_connect_work_done(wpa_s);
 637                 return;
 638         }
 639
 640         sme_send_authentication(wpa_s, cwork->bss, cwork->ssid, 1);
 641 }
 642
 643
 644 void sme_authenticate(struct wpa_supplicant *wpa_s,
 645                       struct wpa_bss *bss, struct wpa_ssid *ssid)
 646 {
 647         struct wpa_connect_work *cwork;
 648
 649         if (bss == NULL || ssid == NULL)
 650                 return;
 651         if (wpa_s->connect_work) {
 652                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reject sme_authenticate() call since connect_work exist");
 653                 return;
 654         }
 655
 656         if (radio_work_pending(wpa_s, "sme-connect")) {
 657                 /*
 658                  * The previous sme-connect work might no longer be valid due to
 659                  * the fact that the BSS list was updated. In addition, it makes
 660                  * sense to adhere to the 'newer' decision.
 661                  */
 662                 wpa_dbg(wpa_s, MSG_DEBUG,
 663                         "SME: Remove previous pending sme-connect");
 664                 radio_remove_works(wpa_s, "sme-connect", 0);
 665         }
 666
 667         wpas_abort_ongoing_scan(wpa_s);
 668
 669         cwork = os_zalloc(sizeof(*cwork));
 670         if (cwork == NULL)
 671                 return;
 672         cwork->bss = bss;
 673         cwork->ssid = ssid;
 674         cwork->sme = 1;
 675
 676 #ifdef CONFIG_SAE
 677         wpa_s->sme.sae.state = SAE_NOTHING;
 678         wpa_s->sme.sae.send_confirm = 0;
 679         wpa_s->sme.sae_group_index = 0;
 680 #endif /* CONFIG_SAE */
 681
 682         if (radio_add_work(wpa_s, bss->freq, "sme-connect", 1,
 683                            sme_auth_start_cb, cwork) < 0)
 684                 wpas_connect_work_free(cwork);
 685 }
 686
 687
 688 #ifdef CONFIG_SAE
 689
 690 static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
 691                         u16 status_code, const u8 *data, size_t len)
 692 {
 693         int *groups;
 694
 695         wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
 696                 "status code %u", auth_transaction, status_code);
 697
 698         if (auth_transaction == 1 &&
 699             status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
 700             wpa_s->sme.sae.state == SAE_COMMITTED &&
 701             wpa_s->current_bss && wpa_s->current_ssid) {
 702                 int default_groups[] = { 19, 20, 21, 25, 26, 0 };
 703                 u16 group;
 704
 705                 groups = wpa_s->conf->sae_groups;
 706                 if (!groups || groups[0] <= 0)
 707                         groups = default_groups;
 708
 709                 if (len < sizeof(le16)) {
 710                         wpa_dbg(wpa_s, MSG_DEBUG,
 711                                 "SME: Too short SAE anti-clogging token request");
 712                         return -1;
 713                 }
 714                 group = WPA_GET_LE16(data);
 715                 wpa_dbg(wpa_s, MSG_DEBUG,
 716                         "SME: SAE anti-clogging token requested (group %u)",
 717                         group);
 718                 if (sae_group_allowed(&wpa_s->sme.sae, groups, group) !=
 719                     WLAN_STATUS_SUCCESS) {
 720                         wpa_dbg(wpa_s, MSG_ERROR,
 721                                 "SME: SAE group %u of anti-clogging request is invalid",
 722                                 group);
 723                         return -1;
 724                 }
 725                 wpabuf_free(wpa_s->sme.sae_token);
 726                 wpa_s->sme.sae_token = wpabuf_alloc_copy(data + sizeof(le16),
 727                                                          len - sizeof(le16));
 728                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 729                                         wpa_s->current_ssid, 1);
 730                 return 0;
 731         }
 732
 733         if (auth_transaction == 1 &&
 734             status_code == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED &&
 735             wpa_s->sme.sae.state == SAE_COMMITTED &&
 736             wpa_s->current_bss && wpa_s->current_ssid) {
 737                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE group not supported");
 738                 wpa_s->sme.sae_group_index++;
 739                 if (sme_set_sae_group(wpa_s) < 0)
 740                         return -1; /* no other groups enabled */
 741                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Try next enabled SAE group");
 742                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 743                                         wpa_s->current_ssid, 1);
 744                 return 0;
 745         }
 746
 747         if (status_code != WLAN_STATUS_SUCCESS)
 748                 return -1;
 749
 750         if (auth_transaction == 1) {
 751                 u16 res;
 752
 753                 groups = wpa_s->conf->sae_groups;
 754
 755                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
 756                 if (wpa_s->current_bss == NULL ||
 757                     wpa_s->current_ssid == NULL)
 758                         return -1;
 759                 if (wpa_s->sme.sae.state != SAE_COMMITTED)
 760                         return -1;
 761                 if (groups && groups[0] <= 0)
 762                         groups = NULL;
 763                 res = sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL,
 764                                        groups);
 765                 if (res == SAE_SILENTLY_DISCARD) {
 766                         wpa_printf(MSG_DEBUG,
 767                                    "SAE: Drop commit message due to reflection attack");
 768                         return 0;
 769                 }
 770                 if (res != WLAN_STATUS_SUCCESS)
 771                         return -1;
 772
 773                 if (sae_process_commit(&wpa_s->sme.sae) < 0) {
 774                         wpa_printf(MSG_DEBUG, "SAE: Failed to process peer "
 775                                    "commit");
 776                         return -1;
 777                 }
 778
 779                 wpabuf_free(wpa_s->sme.sae_token);
 780                 wpa_s->sme.sae_token = NULL;
 781                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 782                                         wpa_s->current_ssid, 0);
 783                 return 0;
 784         } else if (auth_transaction == 2) {
 785                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
 786                 if (wpa_s->sme.sae.state != SAE_CONFIRMED)
 787                         return -1;
 788                 if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0)
 789                         return -1;
 790                 wpa_s->sme.sae.state = SAE_ACCEPTED;
 791                 sae_clear_temp_data(&wpa_s->sme.sae);
 792                 return 1;
 793         }
 794
 795         return -1;
 796 }
 797 #endif /* CONFIG_SAE */
 798
 799
 800 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
 801 {
 802         struct wpa_ssid *ssid = wpa_s->current_ssid;
 803
 804         if (ssid == NULL) {
 805                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 806                         "when network is not selected");
 807                 return;
 808         }
 809
 810         if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
 811                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 812                         "when not in authenticating state");
 813                 return;
 814         }
 815
 816         if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
 817                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
 818                         "unexpected peer " MACSTR,
 819                         MAC2STR(data->auth.peer));
 820                 return;
 821         }
 822
 823         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
 824                 " auth_type=%d auth_transaction=%d status_code=%d",
 825                 MAC2STR(data->auth.peer), data->auth.auth_type,
 826                 data->auth.auth_transaction, data->auth.status_code);
 827         wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
 828                     data->auth.ies, data->auth.ies_len);
 829
 830         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 831
 832 #ifdef CONFIG_SAE
 833         if (data->auth.auth_type == WLAN_AUTH_SAE) {
 834                 int res;
 835                 res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
 836                                    data->auth.status_code, data->auth.ies,
 837                                    data->auth.ies_len);
 838                 if (res < 0) {
 839                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 840                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 841
 842                 }
 843                 if (res != 1)
 844                         return;
 845
 846                 wpa_printf(MSG_DEBUG, "SME: SAE completed - setting PMK for "
 847                            "4-way handshake");
 848                 wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN,
 849                                wpa_s->sme.sae.pmkid, wpa_s->pending_bssid);
 850         }
 851 #endif /* CONFIG_SAE */
 852
 853         if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
 854                 char *ie_txt = NULL;
 855
 856                 if (data->auth.ies && data->auth.ies_len) {
 857                         size_t buflen = 2 * data->auth.ies_len + 1;
 858                         ie_txt = os_malloc(buflen);
 859                         if (ie_txt) {
 860                                 wpa_snprintf_hex(ie_txt, buflen, data->auth.ies,
 861                                                  data->auth.ies_len);
 862                         }
 863                 }
 864                 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_AUTH_REJECT MACSTR
 865                         " auth_type=%u auth_transaction=%u status_code=%u ie=%s",
 866                         MAC2STR(data->auth.peer), data->auth.auth_type,
 867                         data->auth.auth_transaction, data->auth.status_code,
 868                         ie_txt);
 869                 os_free(ie_txt);
 870
 871                 if (data->auth.status_code !=
 872                     WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
 873                     wpa_s->sme.auth_alg == data->auth.auth_type ||
 874                     wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
 875                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 876                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 877                         return;
 878                 }
 879
 880                 wpas_connect_work_done(wpa_s);
 881
 882                 switch (data->auth.auth_type) {
 883                 case WLAN_AUTH_OPEN:
 884                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 885
 886                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
 887                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 888                                                  wpa_s->current_ssid);
 889                         return;
 890
 891                 case WLAN_AUTH_SHARED_KEY:
 892                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
 893
 894                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
 895                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 896                                                  wpa_s->current_ssid);
 897                         return;
 898
 899                 default:
 900                         return;
 901                 }
 902         }
 903
 904 #ifdef CONFIG_IEEE80211R
 905         if (data->auth.auth_type == WLAN_AUTH_FT) {
 906                 if (wpa_ft_process_response(wpa_s->wpa, data->auth.ies,
 907                                             data->auth.ies_len, 0,
 908                                             data->auth.peer, NULL, 0) < 0) {
 909                         wpa_dbg(wpa_s, MSG_DEBUG,
 910                                 "SME: FT Authentication response processing failed");
 911                         wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "bssid="
 912                                 MACSTR
 913                                 " reason=%d locally_generated=1",
 914                                 MAC2STR(wpa_s->pending_bssid),
 915                                 WLAN_REASON_DEAUTH_LEAVING);
 916                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 917                         wpa_supplicant_mark_disassoc(wpa_s);
 918                         return;
 919                 }
 920         }
 921 #endif /* CONFIG_IEEE80211R */
 922
 923         sme_associate(wpa_s, ssid->mode, data->auth.peer,
 924                       data->auth.auth_type);
 925 }
 926
 927
 928 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
 929                    const u8 *bssid, u16 auth_type)
 930 {
 931         struct wpa_driver_associate_params params;
 932         struct ieee802_11_elems elems;
 933 #ifdef CONFIG_HT_OVERRIDES
 934         struct ieee80211_ht_capabilities htcaps;
 935         struct ieee80211_ht_capabilities htcaps_mask;
 936 #endif /* CONFIG_HT_OVERRIDES */
 937 #ifdef CONFIG_VHT_OVERRIDES
 938         struct ieee80211_vht_capabilities vhtcaps;
 939         struct ieee80211_vht_capabilities vhtcaps_mask;
 940 #endif /* CONFIG_VHT_OVERRIDES */
 941
 942         os_memset(&params, 0, sizeof(params));
 943         params.bssid = bssid;
 944         params.ssid = wpa_s->sme.ssid;
 945         params.ssid_len = wpa_s->sme.ssid_len;
 946         params.freq.freq = wpa_s->sme.freq;
 947         params.bg_scan_period = wpa_s->current_ssid ?
 948                 wpa_s->current_ssid->bg_scan_period : -1;
 949         params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
 950                 wpa_s->sme.assoc_req_ie : NULL;
 951         params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
 952         params.pairwise_suite = wpa_s->pairwise_cipher;
 953         params.group_suite = wpa_s->group_cipher;
 954         params.key_mgmt_suite = wpa_s->key_mgmt;
 955         params.wpa_proto = wpa_s->wpa_proto;
 956 #ifdef CONFIG_HT_OVERRIDES
 957         os_memset(&htcaps, 0, sizeof(htcaps));
 958         os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
 959         params.htcaps = (u8 *) &htcaps;
 960         params.htcaps_mask = (u8 *) &htcaps_mask;
 961         wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, &params);
 962 #endif /* CONFIG_HT_OVERRIDES */
 963 #ifdef CONFIG_VHT_OVERRIDES
 964         os_memset(&vhtcaps, 0, sizeof(vhtcaps));
 965         os_memset(&vhtcaps_mask, 0, sizeof(vhtcaps_mask));
 966         params.vhtcaps = &vhtcaps;
 967         params.vhtcaps_mask = &vhtcaps_mask;
 968         wpa_supplicant_apply_vht_overrides(wpa_s, wpa_s->current_ssid, &params);
 969 #endif /* CONFIG_VHT_OVERRIDES */
 970 #ifdef CONFIG_IEEE80211R
 971         if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
 972                 params.wpa_ie = wpa_s->sme.ft_ies;
 973                 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
 974         }
 975 #endif /* CONFIG_IEEE80211R */
 976         params.mode = mode;
 977         params.mgmt_frame_protection = wpa_s->sme.mfp;
 978         params.rrm_used = wpa_s->rrm.rrm_used;
 979         if (wpa_s->sme.prev_bssid_set)
 980                 params.prev_bssid = wpa_s->sme.prev_bssid;
 981
 982         wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
 983                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 984                 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
 985                 params.freq.freq);
 986
 987         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
 988
 989         if (params.wpa_ie == NULL ||
 990             ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
 991             < 0) {
 992                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
 993                 os_memset(&elems, 0, sizeof(elems));
 994         }
 995         if (elems.rsn_ie) {
 996                 params.wpa_proto = WPA_PROTO_RSN;
 997                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
 998                                         elems.rsn_ie_len + 2);
 999         } else if (elems.wpa_ie) {
1000                 params.wpa_proto = WPA_PROTO_WPA;
1001                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
1002                                         elems.wpa_ie_len + 2);
1003         } else if (elems.osen) {
1004                 params.wpa_proto = WPA_PROTO_OSEN;
1005                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.osen - 2,
1006                                         elems.osen_len + 2);
1007         } else
1008                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
1009         if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
1010                 params.p2p = 1;
1011
1012         if (wpa_s->parent->set_sta_uapsd)
1013                 params.uapsd = wpa_s->parent->sta_uapsd;
1014         else
1015                 params.uapsd = -1;
1016
1017         if (wpa_drv_associate(wpa_s, &params) < 0) {
1018                 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
1019                         "driver failed");
1020                 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1021                 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
1022                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1023                 return;
1024         }
1025
1026         eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
1027                                NULL);
1028 }
1029
1030
1031 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
1032                       const u8 *ies, size_t ies_len)
1033 {
1034         if (md == NULL || ies == NULL) {
1035                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
1036                 os_free(wpa_s->sme.ft_ies);
1037                 wpa_s->sme.ft_ies = NULL;
1038                 wpa_s->sme.ft_ies_len = 0;
1039                 wpa_s->sme.ft_used = 0;
1040                 return 0;
1041         }
1042
1043         os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
1044         wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
1045         os_free(wpa_s->sme.ft_ies);
1046         wpa_s->sme.ft_ies = os_malloc(ies_len);
1047         if (wpa_s->sme.ft_ies == NULL)
1048                 return -1;
1049         os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
1050         wpa_s->sme.ft_ies_len = ies_len;
1051         return 0;
1052 }
1053
1054
1055 static void sme_deauth(struct wpa_supplicant *wpa_s)
1056 {
1057         int bssid_changed;
1058
1059         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
1060
1061         if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
1062                                    WLAN_REASON_DEAUTH_LEAVING) < 0) {
1063                 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
1064                         "failed");
1065         }
1066         wpa_s->sme.prev_bssid_set = 0;
1067
1068         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1069         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
1070         os_memset(wpa_s->bssid, 0, ETH_ALEN);
1071         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1072         if (bssid_changed)
1073                 wpas_notify_bssid_changed(wpa_s);
1074 }
1075
1076
1077 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
1078                             union wpa_event_data *data)
1079 {
1080         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
1081                 "status code %d", MAC2STR(wpa_s->pending_bssid),
1082                 data->assoc_reject.status_code);
1083
1084         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1085
1086 #ifdef CONFIG_SAE
1087         if (wpa_s->sme.sae_pmksa_caching && wpa_s->current_ssid &&
1088             wpa_key_mgmt_sae(wpa_s->current_ssid->key_mgmt)) {
1089                 wpa_dbg(wpa_s, MSG_DEBUG,
1090                         "PMKSA caching attempt rejected - drop PMKSA cache entry and fall back to SAE authentication");
1091                 wpa_sm_aborted_cached(wpa_s->wpa);
1092                 wpa_sm_pmksa_cache_flush(wpa_s->wpa, wpa_s->current_ssid);
1093                 if (wpa_s->current_bss) {
1094                         struct wpa_bss *bss = wpa_s->current_bss;
1095                         struct wpa_ssid *ssid = wpa_s->current_ssid;
1096
1097                         wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
1098                                                WLAN_REASON_DEAUTH_LEAVING);
1099                         wpas_connect_work_done(wpa_s);
1100                         wpa_supplicant_mark_disassoc(wpa_s);
1101                         wpa_supplicant_connect(wpa_s, bss, ssid);
1102                         return;
1103                 }
1104         }
1105 #endif /* CONFIG_SAE */
1106
1107         /*
1108          * For now, unconditionally terminate the previous authentication. In
1109          * theory, this should not be needed, but mac80211 gets quite confused
1110          * if the authentication is left pending.. Some roaming cases might
1111          * benefit from using the previous authentication, so this could be
1112          * optimized in the future.
1113          */
1114         sme_deauth(wpa_s);
1115 }
1116
1117
1118 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
1119                               union wpa_event_data *data)
1120 {
1121         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
1122         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1123         wpa_supplicant_mark_disassoc(wpa_s);
1124 }
1125
1126
1127 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
1128                                union wpa_event_data *data)
1129 {
1130         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
1131         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1132         wpa_supplicant_mark_disassoc(wpa_s);
1133 }
1134
1135
1136 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
1137                         struct disassoc_info *info)
1138 {
1139         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
1140         if (wpa_s->sme.prev_bssid_set) {
1141                 /*
1142                  * cfg80211/mac80211 can get into somewhat confused state if
1143                  * the AP only disassociates us and leaves us in authenticated
1144                  * state. For now, force the state to be cleared to avoid
1145                  * confusing errors if we try to associate with the AP again.
1146                  */
1147                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
1148                         "driver state");
1149                 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
1150                                        WLAN_REASON_DEAUTH_LEAVING);
1151         }
1152 }
1153
1154
1155 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
1156 {
1157         struct wpa_supplicant *wpa_s = eloop_ctx;
1158         if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
1159                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
1160                 sme_deauth(wpa_s);
1161         }
1162 }
1163
1164
1165 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
1166 {
1167         struct wpa_supplicant *wpa_s = eloop_ctx;
1168         if (wpa_s->wpa_state == WPA_ASSOCIATING) {
1169                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
1170                 sme_deauth(wpa_s);
1171         }
1172 }
1173
1174
1175 void sme_state_changed(struct wpa_supplicant *wpa_s)
1176 {
1177         /* Make sure timers are cleaned up appropriately. */
1178         if (wpa_s->wpa_state != WPA_ASSOCIATING)
1179                 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1180         if (wpa_s->wpa_state != WPA_AUTHENTICATING)
1181                 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1182 }
1183
1184
1185 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
1186                                        const u8 *prev_pending_bssid)
1187 {
1188         /*
1189          * mac80211-workaround to force deauth on failed auth cmd,
1190          * requires us to remain in authenticating state to allow the
1191          * second authentication attempt to be continued properly.
1192          */
1193         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
1194                 "to proceed after disconnection event");
1195         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
1196         os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
1197
1198         /*
1199          * Re-arm authentication timer in case auth fails for whatever reason.
1200          */
1201         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1202         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
1203                                NULL);
1204 }
1205
1206
1207 void sme_clear_on_disassoc(struct wpa_supplicant *wpa_s)
1208 {
1209         wpa_s->sme.prev_bssid_set = 0;
1210 #ifdef CONFIG_SAE
1211         wpabuf_free(wpa_s->sme.sae_token);
1212         wpa_s->sme.sae_token = NULL;
1213         sae_clear_data(&wpa_s->sme.sae);
1214 #endif /* CONFIG_SAE */
1215 #ifdef CONFIG_IEEE80211R
1216         if (wpa_s->sme.ft_ies)
1217                 sme_update_ft_ies(wpa_s, NULL, NULL, 0);
1218 #endif /* CONFIG_IEEE80211R */
1219 }
1220
1221
1222 void sme_deinit(struct wpa_supplicant *wpa_s)
1223 {
1224         os_free(wpa_s->sme.ft_ies);
1225         wpa_s->sme.ft_ies = NULL;
1226         wpa_s->sme.ft_ies_len = 0;
1227 #ifdef CONFIG_IEEE80211W
1228         sme_stop_sa_query(wpa_s);
1229 #endif /* CONFIG_IEEE80211W */
1230         sme_clear_on_disassoc(wpa_s);
1231
1232         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1233         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1234         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1235 }
1236
1237
1238 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
1239                                    const u8 *chan_list, u8 num_channels,
1240                                    u8 num_intol)
1241 {
1242         struct ieee80211_2040_bss_coex_ie *bc_ie;
1243         struct ieee80211_2040_intol_chan_report *ic_report;
1244         struct wpabuf *buf;
1245
1246         wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR
1247                    " (num_channels=%u num_intol=%u)",
1248                    MAC2STR(wpa_s->bssid), num_channels, num_intol);
1249         wpa_hexdump(MSG_DEBUG, "SME: 20/40 BSS Intolerant Channels",
1250                     chan_list, num_channels);
1251
1252         buf = wpabuf_alloc(2 + /* action.category + action_code */
1253                            sizeof(struct ieee80211_2040_bss_coex_ie) +
1254                            sizeof(struct ieee80211_2040_intol_chan_report) +
1255                            num_channels);
1256         if (buf == NULL)
1257                 return;
1258
1259         wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
1260         wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
1261
1262         bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
1263         bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
1264         bc_ie->length = 1;
1265         if (num_intol)
1266                 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
1267
1268         if (num_channels > 0) {
1269                 ic_report = wpabuf_put(buf, sizeof(*ic_report));
1270                 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
1271                 ic_report->length = num_channels + 1;
1272                 ic_report->op_class = 0;
1273                 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
1274                           num_channels);
1275         }
1276
1277         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1278                                 wpa_s->own_addr, wpa_s->bssid,
1279                                 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
1280                 wpa_msg(wpa_s, MSG_INFO,
1281                         "SME: Failed to send 20/40 BSS Coexistence frame");
1282         }
1283
1284         wpabuf_free(buf);
1285 }
1286
1287
1288 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
1289 {
1290         struct wpa_bss *bss;
1291         const u8 *ie;
1292         u16 ht_cap;
1293         u8 chan_list[P2P_MAX_CHANNELS], channel;
1294         u8 num_channels = 0, num_intol = 0, i;
1295
1296         if (!wpa_s->sme.sched_obss_scan)
1297                 return 0;
1298
1299         wpa_s->sme.sched_obss_scan = 0;
1300         if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
1301                 return 1;
1302
1303         /*
1304          * Check whether AP uses regulatory triplet or channel triplet in
1305          * country info. Right now the operating class of the BSS channel
1306          * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
1307          * based on the assumption that operating class triplet is not used in
1308          * beacon frame. If the First Channel Number/Operating Extension
1309          * Identifier octet has a positive integer value of 201 or greater,
1310          * then its operating class triplet.
1311          *
1312          * TODO: If Supported Operating Classes element is present in beacon
1313          * frame, have to lookup operating class in Annex E and fill them in
1314          * 2040 coex frame.
1315          */
1316         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
1317         if (ie && (ie[1] >= 6) && (ie[5] >= 201))
1318                 return 1;
1319
1320         os_memset(chan_list, 0, sizeof(chan_list));
1321
1322         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1323                 /* Skip other band bss */
1324                 enum hostapd_hw_mode mode;
1325                 mode = ieee80211_freq_to_chan(bss->freq, &channel);
1326                 if (mode != HOSTAPD_MODE_IEEE80211G &&
1327                     mode != HOSTAPD_MODE_IEEE80211B)
1328                         continue;
1329
1330                 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
1331                 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
1332                 wpa_printf(MSG_DEBUG, "SME OBSS scan BSS " MACSTR
1333                            " freq=%u chan=%u ht_cap=0x%x",
1334                            MAC2STR(bss->bssid), bss->freq, channel, ht_cap);
1335
1336                 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
1337                         if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
1338                                 num_intol++;
1339
1340                         /* Check whether the channel is already considered */
1341                         for (i = 0; i < num_channels; i++) {
1342                                 if (channel == chan_list[i])
1343                                         break;
1344                         }
1345                         if (i != num_channels)
1346                                 continue;
1347
1348                         chan_list[num_channels++] = channel;
1349                 }
1350         }
1351
1352         sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
1353         return 1;
1354 }
1355
1356
1357 static void wpa_obss_scan_freqs_list(struct wpa_supplicant *wpa_s,
1358                                      struct wpa_driver_scan_params *params)
1359 {
1360         /* Include only affected channels */
1361         struct hostapd_hw_modes *mode;
1362         int count, i;
1363         int start, end;
1364
1365         mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes,
1366                         HOSTAPD_MODE_IEEE80211G);
1367         if (mode == NULL) {
1368                 /* No channels supported in this band - use empty list */
1369                 params->freqs = os_zalloc(sizeof(int));
1370                 return;
1371         }
1372
1373         if (wpa_s->sme.ht_sec_chan == HT_SEC_CHAN_UNKNOWN &&
1374             wpa_s->current_bss) {
1375                 const u8 *ie;
1376
1377                 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_OPERATION);
1378                 if (ie && ie[1] >= 2) {
1379                         u8 o;
1380
1381                         o = ie[3] & HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK;
1382                         if (o == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
1383                                 wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_ABOVE;
1384                         else if (o == HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
1385                                 wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_BELOW;
1386                 }
1387         }
1388
1389         start = wpa_s->assoc_freq - 10;
1390         end = wpa_s->assoc_freq + 10;
1391         switch (wpa_s->sme.ht_sec_chan) {
1392         case HT_SEC_CHAN_UNKNOWN:
1393                 /* HT40+ possible on channels 1..9 */
1394                 if (wpa_s->assoc_freq <= 2452)
1395                         start -= 20;
1396                 /* HT40- possible on channels 5-13 */
1397                 if (wpa_s->assoc_freq >= 2432)
1398                         end += 20;
1399                 break;
1400         case HT_SEC_CHAN_ABOVE:
1401                 end += 20;
1402                 break;
1403         case HT_SEC_CHAN_BELOW:
1404                 start -= 20;
1405                 break;
1406         }
1407         wpa_printf(MSG_DEBUG,
1408                    "OBSS: assoc_freq %d possible affected range %d-%d",
1409                    wpa_s->assoc_freq, start, end);
1410
1411         params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
1412         if (params->freqs == NULL)
1413                 return;
1414         for (count = 0, i = 0; i < mode->num_channels; i++) {
1415                 int freq;
1416
1417                 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
1418                         continue;
1419                 freq = mode->channels[i].freq;
1420                 if (freq - 10 >= end || freq + 10 <= start)
1421                         continue; /* not affected */
1422                 params->freqs[count++] = freq;
1423         }
1424 }
1425
1426
1427 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1428 {
1429         struct wpa_supplicant *wpa_s = eloop_ctx;
1430         struct wpa_driver_scan_params params;
1431
1432         if (!wpa_s->current_bss) {
1433                 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
1434                 return;
1435         }
1436
1437         os_memset(&params, 0, sizeof(params));
1438         wpa_obss_scan_freqs_list(wpa_s, &params);
1439         params.low_priority = 1;
1440         wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
1441
1442         if (wpa_supplicant_trigger_scan(wpa_s, &params))
1443                 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
1444         else
1445                 wpa_s->sme.sched_obss_scan = 1;
1446         os_free(params.freqs);
1447
1448         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1449                                sme_obss_scan_timeout, wpa_s, NULL);
1450 }
1451
1452
1453 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
1454 {
1455         const u8 *ie;
1456         struct wpa_bss *bss = wpa_s->current_bss;
1457         struct wpa_ssid *ssid = wpa_s->current_ssid;
1458         struct hostapd_hw_modes *hw_mode = NULL;
1459         int i;
1460
1461         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1462         wpa_s->sme.sched_obss_scan = 0;
1463         wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_UNKNOWN;
1464         if (!enable)
1465                 return;
1466
1467         /*
1468          * Schedule OBSS scan if driver is using station SME in wpa_supplicant
1469          * or it expects OBSS scan to be performed by wpa_supplicant.
1470          */
1471         if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
1472               (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
1473             ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
1474                 return;
1475
1476         if (!wpa_s->hw.modes)
1477                 return;
1478
1479         /* only HT caps in 11g mode are relevant */
1480         for (i = 0; i < wpa_s->hw.num_modes; i++) {
1481                 hw_mode = &wpa_s->hw.modes[i];
1482                 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
1483                         break;
1484         }
1485
1486         /* Driver does not support HT40 for 11g or doesn't have 11g. */
1487         if (i == wpa_s->hw.num_modes || !hw_mode ||
1488             !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1489                 return;
1490
1491         if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
1492                 return; /* Not associated on 2.4 GHz band */
1493
1494         /* Check whether AP supports HT40 */
1495         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
1496         if (!ie || ie[1] < 2 ||
1497             !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1498                 return; /* AP does not support HT40 */
1499
1500         ie = wpa_bss_get_ie(wpa_s->current_bss,
1501                             WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
1502         if (!ie || ie[1] < 14)
1503                 return; /* AP does not request OBSS scans */
1504
1505         wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
1506         if (wpa_s->sme.obss_scan_int < 10) {
1507                 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
1508                            "replaced with the minimum 10 sec",
1509                            wpa_s->sme.obss_scan_int);
1510                 wpa_s->sme.obss_scan_int = 10;
1511         }
1512         wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
1513                    wpa_s->sme.obss_scan_int);
1514         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1515                                sme_obss_scan_timeout, wpa_s, NULL);
1516 }
1517
1518
1519 #ifdef CONFIG_IEEE80211W
1520
1521 static const unsigned int sa_query_max_timeout = 1000;
1522 static const unsigned int sa_query_retry_timeout = 201;
1523
1524 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
1525 {
1526         u32 tu;
1527         struct os_reltime now, passed;
1528         os_get_reltime(&now);
1529         os_reltime_sub(&now, &wpa_s->sme.sa_query_start, &passed);
1530         tu = (passed.sec * 1000000 + passed.usec) / 1024;
1531         if (sa_query_max_timeout < tu) {
1532                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
1533                 sme_stop_sa_query(wpa_s);
1534                 wpa_supplicant_deauthenticate(
1535                         wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
1536                 return 1;
1537         }
1538
1539         return 0;
1540 }
1541
1542
1543 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
1544                                   const u8 *trans_id)
1545 {
1546         u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
1547         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
1548                 MACSTR, MAC2STR(wpa_s->bssid));
1549         wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
1550                     trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1551         req[0] = WLAN_ACTION_SA_QUERY;
1552         req[1] = WLAN_SA_QUERY_REQUEST;
1553         os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1554         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1555                                 wpa_s->own_addr, wpa_s->bssid,
1556                                 req, sizeof(req), 0) < 0)
1557                 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
1558                         "Request");
1559 }
1560
1561
1562 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
1563 {
1564         struct wpa_supplicant *wpa_s = eloop_ctx;
1565         unsigned int timeout, sec, usec;
1566         u8 *trans_id, *nbuf;
1567
1568         if (wpa_s->sme.sa_query_count > 0 &&
1569             sme_check_sa_query_timeout(wpa_s))
1570                 return;
1571
1572         nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
1573                                 wpa_s->sme.sa_query_count + 1,
1574                                 WLAN_SA_QUERY_TR_ID_LEN);
1575         if (nbuf == NULL)
1576                 return;
1577         if (wpa_s->sme.sa_query_count == 0) {
1578                 /* Starting a new SA Query procedure */
1579                 os_get_reltime(&wpa_s->sme.sa_query_start);
1580         }
1581         trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
1582         wpa_s->sme.sa_query_trans_id = nbuf;
1583         wpa_s->sme.sa_query_count++;
1584
1585         if (os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN) < 0) {
1586                 wpa_printf(MSG_DEBUG, "Could not generate SA Query ID");
1587                 return;
1588         }
1589
1590         timeout = sa_query_retry_timeout;
1591         sec = ((timeout / 1000) * 1024) / 1000;
1592         usec = (timeout % 1000) * 1024;
1593         eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
1594
1595         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
1596                 wpa_s->sme.sa_query_count);
1597
1598         sme_send_sa_query_req(wpa_s, trans_id);
1599 }
1600
1601
1602 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
1603 {
1604         sme_sa_query_timer(wpa_s, NULL);
1605 }
1606
1607
1608 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
1609 {
1610         eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
1611         os_free(wpa_s->sme.sa_query_trans_id);
1612         wpa_s->sme.sa_query_trans_id = NULL;
1613         wpa_s->sme.sa_query_count = 0;
1614 }
1615
1616
1617 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1618                                  const u8 *da, u16 reason_code)
1619 {
1620         struct wpa_ssid *ssid;
1621         struct os_reltime now;
1622
1623         if (wpa_s->wpa_state != WPA_COMPLETED)
1624                 return;
1625         ssid = wpa_s->current_ssid;
1626         if (wpas_get_ssid_pmf(wpa_s, ssid) == NO_MGMT_FRAME_PROTECTION)
1627                 return;
1628         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1629                 return;
1630         if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1631             reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1632                 return;
1633         if (wpa_s->sme.sa_query_count > 0)
1634                 return;
1635
1636         os_get_reltime(&now);
1637         if (wpa_s->sme.last_unprot_disconnect.sec &&
1638             !os_reltime_expired(&now, &wpa_s->sme.last_unprot_disconnect, 10))
1639                 return; /* limit SA Query procedure frequency */
1640         wpa_s->sme.last_unprot_disconnect = now;
1641
1642         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1643                 "possible AP/STA state mismatch - trigger SA Query");
1644         sme_start_sa_query(wpa_s);
1645 }
1646
1647
1648 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1649                      const u8 *data, size_t len)
1650 {
1651         int i;
1652
1653         if (wpa_s->sme.sa_query_trans_id == NULL ||
1654             len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1655             data[0] != WLAN_SA_QUERY_RESPONSE)
1656                 return;
1657         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1658                 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1659
1660         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1661                 return;
1662
1663         for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1664                 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1665                               i * WLAN_SA_QUERY_TR_ID_LEN,
1666                               data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1667                         break;
1668         }
1669
1670         if (i >= wpa_s->sme.sa_query_count) {
1671                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1672                         "transaction identifier found");
1673                 return;
1674         }
1675
1676         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1677                 "from " MACSTR, MAC2STR(sa));
1678         sme_stop_sa_query(wpa_s);
1679 }
1680
1681 #endif /* CONFIG_IEEE80211W */