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_HS20
 560         hs20_configure_frame_filters(wpa_s);
 561 #endif /* CONFIG_HS20 */
 562
 563 #ifdef CONFIG_P2P
 564         /*
 565          * If multi-channel concurrency is not supported, check for any
 566          * frequency conflict. In case of any frequency conflict, remove the
 567          * least prioritized connection.
 568          */
 569         if (wpa_s->num_multichan_concurrent < 2) {
 570                 int freq, num;
 571                 num = get_shared_radio_freqs(wpa_s, &freq, 1);
 572                 if (num > 0 && freq > 0 && freq != params.freq) {
 573                         wpa_printf(MSG_DEBUG,
 574                                    "Conflicting frequency found (%d != %d)",
 575                                    freq, params.freq);
 576                         if (wpas_p2p_handle_frequency_conflicts(wpa_s,
 577                                                                 params.freq,
 578                                                                 ssid) < 0) {
 579                                 wpas_connection_failed(wpa_s, bss->bssid);
 580                                 wpa_supplicant_mark_disassoc(wpa_s);
 581                                 wpabuf_free(resp);
 582                                 wpas_connect_work_done(wpa_s);
 583                                 return;
 584                         }
 585                 }
 586         }
 587 #endif /* CONFIG_P2P */
 588
 589         if (skip_auth) {
 590                 wpa_msg(wpa_s, MSG_DEBUG,
 591                         "SME: Skip authentication step on reassoc-to-same-BSS");
 592                 wpabuf_free(resp);
 593                 sme_associate(wpa_s, ssid->mode, bss->bssid, WLAN_AUTH_OPEN);
 594                 return;
 595         }
 596
 597
 598         wpa_s->sme.auth_alg = params.auth_alg;
 599         if (wpa_drv_authenticate(wpa_s, &params) < 0) {
 600                 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
 601                         "driver failed");
 602                 wpas_connection_failed(wpa_s, bss->bssid);
 603                 wpa_supplicant_mark_disassoc(wpa_s);
 604                 wpabuf_free(resp);
 605                 wpas_connect_work_done(wpa_s);
 606                 return;
 607         }
 608
 609         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 610                                NULL);
 611
 612         /*
 613          * Association will be started based on the authentication event from
 614          * the driver.
 615          */
 616
 617         wpabuf_free(resp);
 618 }
 619
 620
 621 static void sme_auth_start_cb(struct wpa_radio_work *work, int deinit)
 622 {
 623         struct wpa_connect_work *cwork = work->ctx;
 624         struct wpa_supplicant *wpa_s = work->wpa_s;
 625
 626         if (deinit) {
 627                 if (work->started)
 628                         wpa_s->connect_work = NULL;
 629
 630                 wpas_connect_work_free(cwork);
 631                 return;
 632         }
 633
 634         wpa_s->connect_work = work;
 635
 636         if (cwork->bss_removed ||
 637             !wpas_valid_bss_ssid(wpa_s, cwork->bss, cwork->ssid) ||
 638             wpas_network_disabled(wpa_s, cwork->ssid)) {
 639                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: BSS/SSID entry for authentication not valid anymore - drop connection attempt");
 640                 wpas_connect_work_done(wpa_s);
 641                 return;
 642         }
 643
 644         sme_send_authentication(wpa_s, cwork->bss, cwork->ssid, 1);
 645 }
 646
 647
 648 void sme_authenticate(struct wpa_supplicant *wpa_s,
 649                       struct wpa_bss *bss, struct wpa_ssid *ssid)
 650 {
 651         struct wpa_connect_work *cwork;
 652
 653         if (bss == NULL || ssid == NULL)
 654                 return;
 655         if (wpa_s->connect_work) {
 656                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reject sme_authenticate() call since connect_work exist");
 657                 return;
 658         }
 659
 660         if (radio_work_pending(wpa_s, "sme-connect")) {
 661                 /*
 662                  * The previous sme-connect work might no longer be valid due to
 663                  * the fact that the BSS list was updated. In addition, it makes
 664                  * sense to adhere to the 'newer' decision.
 665                  */
 666                 wpa_dbg(wpa_s, MSG_DEBUG,
 667                         "SME: Remove previous pending sme-connect");
 668                 radio_remove_works(wpa_s, "sme-connect", 0);
 669         }
 670
 671         wpas_abort_ongoing_scan(wpa_s);
 672
 673         cwork = os_zalloc(sizeof(*cwork));
 674         if (cwork == NULL)
 675                 return;
 676         cwork->bss = bss;
 677         cwork->ssid = ssid;
 678         cwork->sme = 1;
 679
 680 #ifdef CONFIG_SAE
 681         wpa_s->sme.sae.state = SAE_NOTHING;
 682         wpa_s->sme.sae.send_confirm = 0;
 683         wpa_s->sme.sae_group_index = 0;
 684 #endif /* CONFIG_SAE */
 685
 686         if (radio_add_work(wpa_s, bss->freq, "sme-connect", 1,
 687                            sme_auth_start_cb, cwork) < 0)
 688                 wpas_connect_work_free(cwork);
 689 }
 690
 691
 692 #ifdef CONFIG_SAE
 693
 694 static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
 695                         u16 status_code, const u8 *data, size_t len)
 696 {
 697         int *groups;
 698
 699         wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
 700                 "status code %u", auth_transaction, status_code);
 701
 702         if (auth_transaction == 1 &&
 703             status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
 704             wpa_s->sme.sae.state == SAE_COMMITTED &&
 705             wpa_s->current_bss && wpa_s->current_ssid) {
 706                 int default_groups[] = { 19, 20, 21, 25, 26, 0 };
 707                 u16 group;
 708
 709                 groups = wpa_s->conf->sae_groups;
 710                 if (!groups || groups[0] <= 0)
 711                         groups = default_groups;
 712
 713                 if (len < sizeof(le16)) {
 714                         wpa_dbg(wpa_s, MSG_DEBUG,
 715                                 "SME: Too short SAE anti-clogging token request");
 716                         return -1;
 717                 }
 718                 group = WPA_GET_LE16(data);
 719                 wpa_dbg(wpa_s, MSG_DEBUG,
 720                         "SME: SAE anti-clogging token requested (group %u)",
 721                         group);
 722                 if (sae_group_allowed(&wpa_s->sme.sae, groups, group) !=
 723                     WLAN_STATUS_SUCCESS) {
 724                         wpa_dbg(wpa_s, MSG_ERROR,
 725                                 "SME: SAE group %u of anti-clogging request is invalid",
 726                                 group);
 727                         return -1;
 728                 }
 729                 wpabuf_free(wpa_s->sme.sae_token);
 730                 wpa_s->sme.sae_token = wpabuf_alloc_copy(data + sizeof(le16),
 731                                                          len - sizeof(le16));
 732                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 733                                         wpa_s->current_ssid, 1);
 734                 return 0;
 735         }
 736
 737         if (auth_transaction == 1 &&
 738             status_code == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED &&
 739             wpa_s->sme.sae.state == SAE_COMMITTED &&
 740             wpa_s->current_bss && wpa_s->current_ssid) {
 741                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE group not supported");
 742                 wpa_s->sme.sae_group_index++;
 743                 if (sme_set_sae_group(wpa_s) < 0)
 744                         return -1; /* no other groups enabled */
 745                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Try next enabled SAE group");
 746                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 747                                         wpa_s->current_ssid, 1);
 748                 return 0;
 749         }
 750
 751         if (status_code != WLAN_STATUS_SUCCESS)
 752                 return -1;
 753
 754         if (auth_transaction == 1) {
 755                 u16 res;
 756
 757                 groups = wpa_s->conf->sae_groups;
 758
 759                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
 760                 if (wpa_s->current_bss == NULL ||
 761                     wpa_s->current_ssid == NULL)
 762                         return -1;
 763                 if (wpa_s->sme.sae.state != SAE_COMMITTED)
 764                         return -1;
 765                 if (groups && groups[0] <= 0)
 766                         groups = NULL;
 767                 res = sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL,
 768                                        groups);
 769                 if (res == SAE_SILENTLY_DISCARD) {
 770                         wpa_printf(MSG_DEBUG,
 771                                    "SAE: Drop commit message due to reflection attack");
 772                         return 0;
 773                 }
 774                 if (res != WLAN_STATUS_SUCCESS)
 775                         return -1;
 776
 777                 if (sae_process_commit(&wpa_s->sme.sae) < 0) {
 778                         wpa_printf(MSG_DEBUG, "SAE: Failed to process peer "
 779                                    "commit");
 780                         return -1;
 781                 }
 782
 783                 wpabuf_free(wpa_s->sme.sae_token);
 784                 wpa_s->sme.sae_token = NULL;
 785                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 786                                         wpa_s->current_ssid, 0);
 787                 return 0;
 788         } else if (auth_transaction == 2) {
 789                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
 790                 if (wpa_s->sme.sae.state != SAE_CONFIRMED)
 791                         return -1;
 792                 if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0)
 793                         return -1;
 794                 wpa_s->sme.sae.state = SAE_ACCEPTED;
 795                 sae_clear_temp_data(&wpa_s->sme.sae);
 796                 return 1;
 797         }
 798
 799         return -1;
 800 }
 801 #endif /* CONFIG_SAE */
 802
 803
 804 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
 805 {
 806         struct wpa_ssid *ssid = wpa_s->current_ssid;
 807
 808         if (ssid == NULL) {
 809                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 810                         "when network is not selected");
 811                 return;
 812         }
 813
 814         if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
 815                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 816                         "when not in authenticating state");
 817                 return;
 818         }
 819
 820         if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
 821                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
 822                         "unexpected peer " MACSTR,
 823                         MAC2STR(data->auth.peer));
 824                 return;
 825         }
 826
 827         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
 828                 " auth_type=%d auth_transaction=%d status_code=%d",
 829                 MAC2STR(data->auth.peer), data->auth.auth_type,
 830                 data->auth.auth_transaction, data->auth.status_code);
 831         wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
 832                     data->auth.ies, data->auth.ies_len);
 833
 834         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 835
 836 #ifdef CONFIG_SAE
 837         if (data->auth.auth_type == WLAN_AUTH_SAE) {
 838                 int res;
 839                 res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
 840                                    data->auth.status_code, data->auth.ies,
 841                                    data->auth.ies_len);
 842                 if (res < 0) {
 843                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 844                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 845
 846                 }
 847                 if (res != 1)
 848                         return;
 849
 850                 wpa_printf(MSG_DEBUG, "SME: SAE completed - setting PMK for "
 851                            "4-way handshake");
 852                 wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN,
 853                                wpa_s->sme.sae.pmkid, wpa_s->pending_bssid);
 854         }
 855 #endif /* CONFIG_SAE */
 856
 857         if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
 858                 char *ie_txt = NULL;
 859
 860                 if (data->auth.ies && data->auth.ies_len) {
 861                         size_t buflen = 2 * data->auth.ies_len + 1;
 862                         ie_txt = os_malloc(buflen);
 863                         if (ie_txt) {
 864                                 wpa_snprintf_hex(ie_txt, buflen, data->auth.ies,
 865                                                  data->auth.ies_len);
 866                         }
 867                 }
 868                 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_AUTH_REJECT MACSTR
 869                         " auth_type=%u auth_transaction=%u status_code=%u ie=%s",
 870                         MAC2STR(data->auth.peer), data->auth.auth_type,
 871                         data->auth.auth_transaction, data->auth.status_code,
 872                         ie_txt);
 873                 os_free(ie_txt);
 874
 875                 if (data->auth.status_code !=
 876                     WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
 877                     wpa_s->sme.auth_alg == data->auth.auth_type ||
 878                     wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
 879                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 880                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 881                         return;
 882                 }
 883
 884                 wpas_connect_work_done(wpa_s);
 885
 886                 switch (data->auth.auth_type) {
 887                 case WLAN_AUTH_OPEN:
 888                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 889
 890                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
 891                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 892                                                  wpa_s->current_ssid);
 893                         return;
 894
 895                 case WLAN_AUTH_SHARED_KEY:
 896                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
 897
 898                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
 899                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 900                                                  wpa_s->current_ssid);
 901                         return;
 902
 903                 default:
 904                         return;
 905                 }
 906         }
 907
 908 #ifdef CONFIG_IEEE80211R
 909         if (data->auth.auth_type == WLAN_AUTH_FT) {
 910                 if (wpa_ft_process_response(wpa_s->wpa, data->auth.ies,
 911                                             data->auth.ies_len, 0,
 912                                             data->auth.peer, NULL, 0) < 0) {
 913                         wpa_dbg(wpa_s, MSG_DEBUG,
 914                                 "SME: FT Authentication response processing failed");
 915                         wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "bssid="
 916                                 MACSTR
 917                                 " reason=%d locally_generated=1",
 918                                 MAC2STR(wpa_s->pending_bssid),
 919                                 WLAN_REASON_DEAUTH_LEAVING);
 920                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 921                         wpa_supplicant_mark_disassoc(wpa_s);
 922                         return;
 923                 }
 924         }
 925 #endif /* CONFIG_IEEE80211R */
 926
 927         sme_associate(wpa_s, ssid->mode, data->auth.peer,
 928                       data->auth.auth_type);
 929 }
 930
 931
 932 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
 933                    const u8 *bssid, u16 auth_type)
 934 {
 935         struct wpa_driver_associate_params params;
 936         struct ieee802_11_elems elems;
 937 #ifdef CONFIG_HT_OVERRIDES
 938         struct ieee80211_ht_capabilities htcaps;
 939         struct ieee80211_ht_capabilities htcaps_mask;
 940 #endif /* CONFIG_HT_OVERRIDES */
 941 #ifdef CONFIG_VHT_OVERRIDES
 942         struct ieee80211_vht_capabilities vhtcaps;
 943         struct ieee80211_vht_capabilities vhtcaps_mask;
 944 #endif /* CONFIG_VHT_OVERRIDES */
 945
 946         os_memset(&params, 0, sizeof(params));
 947         params.bssid = bssid;
 948         params.ssid = wpa_s->sme.ssid;
 949         params.ssid_len = wpa_s->sme.ssid_len;
 950         params.freq.freq = wpa_s->sme.freq;
 951         params.bg_scan_period = wpa_s->current_ssid ?
 952                 wpa_s->current_ssid->bg_scan_period : -1;
 953         params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
 954                 wpa_s->sme.assoc_req_ie : NULL;
 955         params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
 956         params.pairwise_suite = wpa_s->pairwise_cipher;
 957         params.group_suite = wpa_s->group_cipher;
 958         params.key_mgmt_suite = wpa_s->key_mgmt;
 959         params.wpa_proto = wpa_s->wpa_proto;
 960 #ifdef CONFIG_HT_OVERRIDES
 961         os_memset(&htcaps, 0, sizeof(htcaps));
 962         os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
 963         params.htcaps = (u8 *) &htcaps;
 964         params.htcaps_mask = (u8 *) &htcaps_mask;
 965         wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, &params);
 966 #endif /* CONFIG_HT_OVERRIDES */
 967 #ifdef CONFIG_VHT_OVERRIDES
 968         os_memset(&vhtcaps, 0, sizeof(vhtcaps));
 969         os_memset(&vhtcaps_mask, 0, sizeof(vhtcaps_mask));
 970         params.vhtcaps = &vhtcaps;
 971         params.vhtcaps_mask = &vhtcaps_mask;
 972         wpa_supplicant_apply_vht_overrides(wpa_s, wpa_s->current_ssid, &params);
 973 #endif /* CONFIG_VHT_OVERRIDES */
 974 #ifdef CONFIG_IEEE80211R
 975         if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
 976                 params.wpa_ie = wpa_s->sme.ft_ies;
 977                 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
 978         }
 979 #endif /* CONFIG_IEEE80211R */
 980         params.mode = mode;
 981         params.mgmt_frame_protection = wpa_s->sme.mfp;
 982         params.rrm_used = wpa_s->rrm.rrm_used;
 983         if (wpa_s->sme.prev_bssid_set)
 984                 params.prev_bssid = wpa_s->sme.prev_bssid;
 985
 986         wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
 987                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 988                 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
 989                 params.freq.freq);
 990
 991         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
 992
 993         if (params.wpa_ie == NULL ||
 994             ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
 995             < 0) {
 996                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
 997                 os_memset(&elems, 0, sizeof(elems));
 998         }
 999         if (elems.rsn_ie) {
1000                 params.wpa_proto = WPA_PROTO_RSN;
1001                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
1002                                         elems.rsn_ie_len + 2);
1003         } else if (elems.wpa_ie) {
1004                 params.wpa_proto = WPA_PROTO_WPA;
1005                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
1006                                         elems.wpa_ie_len + 2);
1007         } else if (elems.osen) {
1008                 params.wpa_proto = WPA_PROTO_OSEN;
1009                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.osen - 2,
1010                                         elems.osen_len + 2);
1011         } else
1012                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
1013         if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
1014                 params.p2p = 1;
1015
1016         if (wpa_s->p2pdev->set_sta_uapsd)
1017                 params.uapsd = wpa_s->p2pdev->sta_uapsd;
1018         else
1019                 params.uapsd = -1;
1020
1021         if (wpa_drv_associate(wpa_s, &params) < 0) {
1022                 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
1023                         "driver failed");
1024                 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1025                 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
1026                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1027                 return;
1028         }
1029
1030         eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
1031                                NULL);
1032 }
1033
1034
1035 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
1036                       const u8 *ies, size_t ies_len)
1037 {
1038         if (md == NULL || ies == NULL) {
1039                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
1040                 os_free(wpa_s->sme.ft_ies);
1041                 wpa_s->sme.ft_ies = NULL;
1042                 wpa_s->sme.ft_ies_len = 0;
1043                 wpa_s->sme.ft_used = 0;
1044                 return 0;
1045         }
1046
1047         os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
1048         wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
1049         os_free(wpa_s->sme.ft_ies);
1050         wpa_s->sme.ft_ies = os_malloc(ies_len);
1051         if (wpa_s->sme.ft_ies == NULL)
1052                 return -1;
1053         os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
1054         wpa_s->sme.ft_ies_len = ies_len;
1055         return 0;
1056 }
1057
1058
1059 static void sme_deauth(struct wpa_supplicant *wpa_s)
1060 {
1061         int bssid_changed;
1062
1063         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
1064
1065         if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
1066                                    WLAN_REASON_DEAUTH_LEAVING) < 0) {
1067                 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
1068                         "failed");
1069         }
1070         wpa_s->sme.prev_bssid_set = 0;
1071
1072         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1073         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
1074         os_memset(wpa_s->bssid, 0, ETH_ALEN);
1075         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1076         if (bssid_changed)
1077                 wpas_notify_bssid_changed(wpa_s);
1078 }
1079
1080
1081 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
1082                             union wpa_event_data *data)
1083 {
1084         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
1085                 "status code %d", MAC2STR(wpa_s->pending_bssid),
1086                 data->assoc_reject.status_code);
1087
1088         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1089
1090 #ifdef CONFIG_SAE
1091         if (wpa_s->sme.sae_pmksa_caching && wpa_s->current_ssid &&
1092             wpa_key_mgmt_sae(wpa_s->current_ssid->key_mgmt)) {
1093                 wpa_dbg(wpa_s, MSG_DEBUG,
1094                         "PMKSA caching attempt rejected - drop PMKSA cache entry and fall back to SAE authentication");
1095                 wpa_sm_aborted_cached(wpa_s->wpa);
1096                 wpa_sm_pmksa_cache_flush(wpa_s->wpa, wpa_s->current_ssid);
1097                 if (wpa_s->current_bss) {
1098                         struct wpa_bss *bss = wpa_s->current_bss;
1099                         struct wpa_ssid *ssid = wpa_s->current_ssid;
1100
1101                         wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
1102                                                WLAN_REASON_DEAUTH_LEAVING);
1103                         wpas_connect_work_done(wpa_s);
1104                         wpa_supplicant_mark_disassoc(wpa_s);
1105                         wpa_supplicant_connect(wpa_s, bss, ssid);
1106                         return;
1107                 }
1108         }
1109 #endif /* CONFIG_SAE */
1110
1111         /*
1112          * For now, unconditionally terminate the previous authentication. In
1113          * theory, this should not be needed, but mac80211 gets quite confused
1114          * if the authentication is left pending.. Some roaming cases might
1115          * benefit from using the previous authentication, so this could be
1116          * optimized in the future.
1117          */
1118         sme_deauth(wpa_s);
1119 }
1120
1121
1122 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
1123                               union wpa_event_data *data)
1124 {
1125         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
1126         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1127         wpa_supplicant_mark_disassoc(wpa_s);
1128 }
1129
1130
1131 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
1132                                union wpa_event_data *data)
1133 {
1134         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
1135         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1136         wpa_supplicant_mark_disassoc(wpa_s);
1137 }
1138
1139
1140 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
1141                         struct disassoc_info *info)
1142 {
1143         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
1144         if (wpa_s->sme.prev_bssid_set) {
1145                 /*
1146                  * cfg80211/mac80211 can get into somewhat confused state if
1147                  * the AP only disassociates us and leaves us in authenticated
1148                  * state. For now, force the state to be cleared to avoid
1149                  * confusing errors if we try to associate with the AP again.
1150                  */
1151                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
1152                         "driver state");
1153                 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
1154                                        WLAN_REASON_DEAUTH_LEAVING);
1155         }
1156 }
1157
1158
1159 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
1160 {
1161         struct wpa_supplicant *wpa_s = eloop_ctx;
1162         if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
1163                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
1164                 sme_deauth(wpa_s);
1165         }
1166 }
1167
1168
1169 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
1170 {
1171         struct wpa_supplicant *wpa_s = eloop_ctx;
1172         if (wpa_s->wpa_state == WPA_ASSOCIATING) {
1173                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
1174                 sme_deauth(wpa_s);
1175         }
1176 }
1177
1178
1179 void sme_state_changed(struct wpa_supplicant *wpa_s)
1180 {
1181         /* Make sure timers are cleaned up appropriately. */
1182         if (wpa_s->wpa_state != WPA_ASSOCIATING)
1183                 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1184         if (wpa_s->wpa_state != WPA_AUTHENTICATING)
1185                 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1186 }
1187
1188
1189 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
1190                                        const u8 *prev_pending_bssid)
1191 {
1192         /*
1193          * mac80211-workaround to force deauth on failed auth cmd,
1194          * requires us to remain in authenticating state to allow the
1195          * second authentication attempt to be continued properly.
1196          */
1197         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
1198                 "to proceed after disconnection event");
1199         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
1200         os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
1201
1202         /*
1203          * Re-arm authentication timer in case auth fails for whatever reason.
1204          */
1205         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1206         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
1207                                NULL);
1208 }
1209
1210
1211 void sme_clear_on_disassoc(struct wpa_supplicant *wpa_s)
1212 {
1213         wpa_s->sme.prev_bssid_set = 0;
1214 #ifdef CONFIG_SAE
1215         wpabuf_free(wpa_s->sme.sae_token);
1216         wpa_s->sme.sae_token = NULL;
1217         sae_clear_data(&wpa_s->sme.sae);
1218 #endif /* CONFIG_SAE */
1219 #ifdef CONFIG_IEEE80211R
1220         if (wpa_s->sme.ft_ies)
1221                 sme_update_ft_ies(wpa_s, NULL, NULL, 0);
1222 #endif /* CONFIG_IEEE80211R */
1223 }
1224
1225
1226 void sme_deinit(struct wpa_supplicant *wpa_s)
1227 {
1228         os_free(wpa_s->sme.ft_ies);
1229         wpa_s->sme.ft_ies = NULL;
1230         wpa_s->sme.ft_ies_len = 0;
1231 #ifdef CONFIG_IEEE80211W
1232         sme_stop_sa_query(wpa_s);
1233 #endif /* CONFIG_IEEE80211W */
1234         sme_clear_on_disassoc(wpa_s);
1235
1236         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1237         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1238         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1239 }
1240
1241
1242 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
1243                                    const u8 *chan_list, u8 num_channels,
1244                                    u8 num_intol)
1245 {
1246         struct ieee80211_2040_bss_coex_ie *bc_ie;
1247         struct ieee80211_2040_intol_chan_report *ic_report;
1248         struct wpabuf *buf;
1249
1250         wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR
1251                    " (num_channels=%u num_intol=%u)",
1252                    MAC2STR(wpa_s->bssid), num_channels, num_intol);
1253         wpa_hexdump(MSG_DEBUG, "SME: 20/40 BSS Intolerant Channels",
1254                     chan_list, num_channels);
1255
1256         buf = wpabuf_alloc(2 + /* action.category + action_code */
1257                            sizeof(struct ieee80211_2040_bss_coex_ie) +
1258                            sizeof(struct ieee80211_2040_intol_chan_report) +
1259                            num_channels);
1260         if (buf == NULL)
1261                 return;
1262
1263         wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
1264         wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
1265
1266         bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
1267         bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
1268         bc_ie->length = 1;
1269         if (num_intol)
1270                 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
1271
1272         if (num_channels > 0) {
1273                 ic_report = wpabuf_put(buf, sizeof(*ic_report));
1274                 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
1275                 ic_report->length = num_channels + 1;
1276                 ic_report->op_class = 0;
1277                 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
1278                           num_channels);
1279         }
1280
1281         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1282                                 wpa_s->own_addr, wpa_s->bssid,
1283                                 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
1284                 wpa_msg(wpa_s, MSG_INFO,
1285                         "SME: Failed to send 20/40 BSS Coexistence frame");
1286         }
1287
1288         wpabuf_free(buf);
1289 }
1290
1291
1292 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
1293 {
1294         struct wpa_bss *bss;
1295         const u8 *ie;
1296         u16 ht_cap;
1297         u8 chan_list[P2P_MAX_CHANNELS], channel;
1298         u8 num_channels = 0, num_intol = 0, i;
1299
1300         if (!wpa_s->sme.sched_obss_scan)
1301                 return 0;
1302
1303         wpa_s->sme.sched_obss_scan = 0;
1304         if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
1305                 return 1;
1306
1307         /*
1308          * Check whether AP uses regulatory triplet or channel triplet in
1309          * country info. Right now the operating class of the BSS channel
1310          * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
1311          * based on the assumption that operating class triplet is not used in
1312          * beacon frame. If the First Channel Number/Operating Extension
1313          * Identifier octet has a positive integer value of 201 or greater,
1314          * then its operating class triplet.
1315          *
1316          * TODO: If Supported Operating Classes element is present in beacon
1317          * frame, have to lookup operating class in Annex E and fill them in
1318          * 2040 coex frame.
1319          */
1320         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
1321         if (ie && (ie[1] >= 6) && (ie[5] >= 201))
1322                 return 1;
1323
1324         os_memset(chan_list, 0, sizeof(chan_list));
1325
1326         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1327                 /* Skip other band bss */
1328                 enum hostapd_hw_mode mode;
1329                 mode = ieee80211_freq_to_chan(bss->freq, &channel);
1330                 if (mode != HOSTAPD_MODE_IEEE80211G &&
1331                     mode != HOSTAPD_MODE_IEEE80211B)
1332                         continue;
1333
1334                 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
1335                 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
1336                 wpa_printf(MSG_DEBUG, "SME OBSS scan BSS " MACSTR
1337                            " freq=%u chan=%u ht_cap=0x%x",
1338                            MAC2STR(bss->bssid), bss->freq, channel, ht_cap);
1339
1340                 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
1341                         if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
1342                                 num_intol++;
1343
1344                         /* Check whether the channel is already considered */
1345                         for (i = 0; i < num_channels; i++) {
1346                                 if (channel == chan_list[i])
1347                                         break;
1348                         }
1349                         if (i != num_channels)
1350                                 continue;
1351
1352                         chan_list[num_channels++] = channel;
1353                 }
1354         }
1355
1356         sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
1357         return 1;
1358 }
1359
1360
1361 static void wpa_obss_scan_freqs_list(struct wpa_supplicant *wpa_s,
1362                                      struct wpa_driver_scan_params *params)
1363 {
1364         /* Include only affected channels */
1365         struct hostapd_hw_modes *mode;
1366         int count, i;
1367         int start, end;
1368
1369         mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes,
1370                         HOSTAPD_MODE_IEEE80211G);
1371         if (mode == NULL) {
1372                 /* No channels supported in this band - use empty list */
1373                 params->freqs = os_zalloc(sizeof(int));
1374                 return;
1375         }
1376
1377         if (wpa_s->sme.ht_sec_chan == HT_SEC_CHAN_UNKNOWN &&
1378             wpa_s->current_bss) {
1379                 const u8 *ie;
1380
1381                 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_OPERATION);
1382                 if (ie && ie[1] >= 2) {
1383                         u8 o;
1384
1385                         o = ie[3] & HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK;
1386                         if (o == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
1387                                 wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_ABOVE;
1388                         else if (o == HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
1389                                 wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_BELOW;
1390                 }
1391         }
1392
1393         start = wpa_s->assoc_freq - 10;
1394         end = wpa_s->assoc_freq + 10;
1395         switch (wpa_s->sme.ht_sec_chan) {
1396         case HT_SEC_CHAN_UNKNOWN:
1397                 /* HT40+ possible on channels 1..9 */
1398                 if (wpa_s->assoc_freq <= 2452)
1399                         start -= 20;
1400                 /* HT40- possible on channels 5-13 */
1401                 if (wpa_s->assoc_freq >= 2432)
1402                         end += 20;
1403                 break;
1404         case HT_SEC_CHAN_ABOVE:
1405                 end += 20;
1406                 break;
1407         case HT_SEC_CHAN_BELOW:
1408                 start -= 20;
1409                 break;
1410         }
1411         wpa_printf(MSG_DEBUG,
1412                    "OBSS: assoc_freq %d possible affected range %d-%d",
1413                    wpa_s->assoc_freq, start, end);
1414
1415         params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
1416         if (params->freqs == NULL)
1417                 return;
1418         for (count = 0, i = 0; i < mode->num_channels; i++) {
1419                 int freq;
1420
1421                 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
1422                         continue;
1423                 freq = mode->channels[i].freq;
1424                 if (freq - 10 >= end || freq + 10 <= start)
1425                         continue; /* not affected */
1426                 params->freqs[count++] = freq;
1427         }
1428 }
1429
1430
1431 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1432 {
1433         struct wpa_supplicant *wpa_s = eloop_ctx;
1434         struct wpa_driver_scan_params params;
1435
1436         if (!wpa_s->current_bss) {
1437                 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
1438                 return;
1439         }
1440
1441         os_memset(&params, 0, sizeof(params));
1442         wpa_obss_scan_freqs_list(wpa_s, &params);
1443         params.low_priority = 1;
1444         wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
1445
1446         if (wpa_supplicant_trigger_scan(wpa_s, &params))
1447                 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
1448         else
1449                 wpa_s->sme.sched_obss_scan = 1;
1450         os_free(params.freqs);
1451
1452         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1453                                sme_obss_scan_timeout, wpa_s, NULL);
1454 }
1455
1456
1457 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
1458 {
1459         const u8 *ie;
1460         struct wpa_bss *bss = wpa_s->current_bss;
1461         struct wpa_ssid *ssid = wpa_s->current_ssid;
1462         struct hostapd_hw_modes *hw_mode = NULL;
1463         int i;
1464
1465         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1466         wpa_s->sme.sched_obss_scan = 0;
1467         wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_UNKNOWN;
1468         if (!enable)
1469                 return;
1470
1471         /*
1472          * Schedule OBSS scan if driver is using station SME in wpa_supplicant
1473          * or it expects OBSS scan to be performed by wpa_supplicant.
1474          */
1475         if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
1476               (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
1477             ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
1478                 return;
1479
1480         if (!wpa_s->hw.modes)
1481                 return;
1482
1483         /* only HT caps in 11g mode are relevant */
1484         for (i = 0; i < wpa_s->hw.num_modes; i++) {
1485                 hw_mode = &wpa_s->hw.modes[i];
1486                 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
1487                         break;
1488         }
1489
1490         /* Driver does not support HT40 for 11g or doesn't have 11g. */
1491         if (i == wpa_s->hw.num_modes || !hw_mode ||
1492             !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1493                 return;
1494
1495         if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
1496                 return; /* Not associated on 2.4 GHz band */
1497
1498         /* Check whether AP supports HT40 */
1499         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
1500         if (!ie || ie[1] < 2 ||
1501             !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1502                 return; /* AP does not support HT40 */
1503
1504         ie = wpa_bss_get_ie(wpa_s->current_bss,
1505                             WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
1506         if (!ie || ie[1] < 14)
1507                 return; /* AP does not request OBSS scans */
1508
1509         wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
1510         if (wpa_s->sme.obss_scan_int < 10) {
1511                 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
1512                            "replaced with the minimum 10 sec",
1513                            wpa_s->sme.obss_scan_int);
1514                 wpa_s->sme.obss_scan_int = 10;
1515         }
1516         wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
1517                    wpa_s->sme.obss_scan_int);
1518         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1519                                sme_obss_scan_timeout, wpa_s, NULL);
1520 }
1521
1522
1523 #ifdef CONFIG_IEEE80211W
1524
1525 static const unsigned int sa_query_max_timeout = 1000;
1526 static const unsigned int sa_query_retry_timeout = 201;
1527
1528 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
1529 {
1530         u32 tu;
1531         struct os_reltime now, passed;
1532         os_get_reltime(&now);
1533         os_reltime_sub(&now, &wpa_s->sme.sa_query_start, &passed);
1534         tu = (passed.sec * 1000000 + passed.usec) / 1024;
1535         if (sa_query_max_timeout < tu) {
1536                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
1537                 sme_stop_sa_query(wpa_s);
1538                 wpa_supplicant_deauthenticate(
1539                         wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
1540                 return 1;
1541         }
1542
1543         return 0;
1544 }
1545
1546
1547 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
1548                                   const u8 *trans_id)
1549 {
1550         u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
1551         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
1552                 MACSTR, MAC2STR(wpa_s->bssid));
1553         wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
1554                     trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1555         req[0] = WLAN_ACTION_SA_QUERY;
1556         req[1] = WLAN_SA_QUERY_REQUEST;
1557         os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1558         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1559                                 wpa_s->own_addr, wpa_s->bssid,
1560                                 req, sizeof(req), 0) < 0)
1561                 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
1562                         "Request");
1563 }
1564
1565
1566 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
1567 {
1568         struct wpa_supplicant *wpa_s = eloop_ctx;
1569         unsigned int timeout, sec, usec;
1570         u8 *trans_id, *nbuf;
1571
1572         if (wpa_s->sme.sa_query_count > 0 &&
1573             sme_check_sa_query_timeout(wpa_s))
1574                 return;
1575
1576         nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
1577                                 wpa_s->sme.sa_query_count + 1,
1578                                 WLAN_SA_QUERY_TR_ID_LEN);
1579         if (nbuf == NULL)
1580                 return;
1581         if (wpa_s->sme.sa_query_count == 0) {
1582                 /* Starting a new SA Query procedure */
1583                 os_get_reltime(&wpa_s->sme.sa_query_start);
1584         }
1585         trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
1586         wpa_s->sme.sa_query_trans_id = nbuf;
1587         wpa_s->sme.sa_query_count++;
1588
1589         if (os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN) < 0) {
1590                 wpa_printf(MSG_DEBUG, "Could not generate SA Query ID");
1591                 return;
1592         }
1593
1594         timeout = sa_query_retry_timeout;
1595         sec = ((timeout / 1000) * 1024) / 1000;
1596         usec = (timeout % 1000) * 1024;
1597         eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
1598
1599         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
1600                 wpa_s->sme.sa_query_count);
1601
1602         sme_send_sa_query_req(wpa_s, trans_id);
1603 }
1604
1605
1606 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
1607 {
1608         sme_sa_query_timer(wpa_s, NULL);
1609 }
1610
1611
1612 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
1613 {
1614         eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
1615         os_free(wpa_s->sme.sa_query_trans_id);
1616         wpa_s->sme.sa_query_trans_id = NULL;
1617         wpa_s->sme.sa_query_count = 0;
1618 }
1619
1620
1621 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1622                                  const u8 *da, u16 reason_code)
1623 {
1624         struct wpa_ssid *ssid;
1625         struct os_reltime now;
1626
1627         if (wpa_s->wpa_state != WPA_COMPLETED)
1628                 return;
1629         ssid = wpa_s->current_ssid;
1630         if (wpas_get_ssid_pmf(wpa_s, ssid) == NO_MGMT_FRAME_PROTECTION)
1631                 return;
1632         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1633                 return;
1634         if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1635             reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1636                 return;
1637         if (wpa_s->sme.sa_query_count > 0)
1638                 return;
1639
1640         os_get_reltime(&now);
1641         if (wpa_s->sme.last_unprot_disconnect.sec &&
1642             !os_reltime_expired(&now, &wpa_s->sme.last_unprot_disconnect, 10))
1643                 return; /* limit SA Query procedure frequency */
1644         wpa_s->sme.last_unprot_disconnect = now;
1645
1646         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1647                 "possible AP/STA state mismatch - trigger SA Query");
1648         sme_start_sa_query(wpa_s);
1649 }
1650
1651
1652 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1653                      const u8 *data, size_t len)
1654 {
1655         int i;
1656
1657         if (wpa_s->sme.sa_query_trans_id == NULL ||
1658             len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1659             data[0] != WLAN_SA_QUERY_RESPONSE)
1660                 return;
1661         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1662                 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1663
1664         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1665                 return;
1666
1667         for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1668                 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1669                               i * WLAN_SA_QUERY_TR_ID_LEN,
1670                               data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1671                         break;
1672         }
1673
1674         if (i >= wpa_s->sme.sa_query_count) {
1675                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1676                         "transaction identifier found");
1677                 return;
1678         }
1679
1680         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1681                 "from " MACSTR, MAC2STR(sa));
1682         sme_stop_sa_query(wpa_s);
1683 }
1684
1685 #endif /* CONFIG_IEEE80211W */