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_HS20
 423         if (is_hs20_network(wpa_s, ssid, bss)) {
 424                 struct wpabuf *hs20;
 425                 hs20 = wpabuf_alloc(20);
 426                 if (hs20) {
 427                         int pps_mo_id = hs20_get_pps_mo_id(wpa_s, ssid);
 428                         size_t len;
 429
 430                         wpas_hs20_add_indication(hs20, pps_mo_id);
 431                         len = sizeof(wpa_s->sme.assoc_req_ie) -
 432                                 wpa_s->sme.assoc_req_ie_len;
 433                         if (wpabuf_len(hs20) <= len) {
 434                                 os_memcpy(wpa_s->sme.assoc_req_ie +
 435                                           wpa_s->sme.assoc_req_ie_len,
 436                                           wpabuf_head(hs20), wpabuf_len(hs20));
 437                                 wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
 438                         }
 439                         wpabuf_free(hs20);
 440                 }
 441         }
 442 #endif /* CONFIG_HS20 */
 443
 444 #ifdef CONFIG_FST
 445         if (wpa_s->fst_ies) {
 446                 int fst_ies_len = wpabuf_len(wpa_s->fst_ies);
 447
 448                 if (wpa_s->sme.assoc_req_ie_len + fst_ies_len <=
 449                     sizeof(wpa_s->sme.assoc_req_ie)) {
 450                         os_memcpy(wpa_s->sme.assoc_req_ie +
 451                                   wpa_s->sme.assoc_req_ie_len,
 452                                   wpabuf_head(wpa_s->fst_ies),
 453                                   fst_ies_len);
 454                         wpa_s->sme.assoc_req_ie_len += fst_ies_len;
 455                 }
 456         }
 457 #endif /* CONFIG_FST */
 458
 459         sme_auth_handle_rrm(wpa_s, bss);
 460
 461 #ifdef CONFIG_MBO
 462         mbo = wpa_bss_get_vendor_ie(bss, MBO_IE_VENDOR_TYPE);
 463         if (mbo) {
 464                 int len;
 465
 466                 len = wpas_mbo_supp_op_class_ie(
 467                         wpa_s, bss->freq,
 468                         wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len,
 469                         sizeof(wpa_s->sme.assoc_req_ie) -
 470                         wpa_s->sme.assoc_req_ie_len);
 471                 if (len > 0)
 472                         wpa_s->sme.assoc_req_ie_len += len;
 473         }
 474 #endif /* CONFIG_MBO */
 475
 476         ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab,
 477                                              sizeof(ext_capab));
 478         if (ext_capab_len > 0) {
 479                 u8 *pos = wpa_s->sme.assoc_req_ie;
 480                 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
 481                         pos += 2 + pos[1];
 482                 os_memmove(pos + ext_capab_len, pos,
 483                            wpa_s->sme.assoc_req_ie_len -
 484                            (pos - wpa_s->sme.assoc_req_ie));
 485                 wpa_s->sme.assoc_req_ie_len += ext_capab_len;
 486                 os_memcpy(pos, ext_capab, ext_capab_len);
 487         }
 488
 489         if (wpa_s->vendor_elem[VENDOR_ELEM_ASSOC_REQ]) {
 490                 struct wpabuf *buf = wpa_s->vendor_elem[VENDOR_ELEM_ASSOC_REQ];
 491                 size_t len;
 492
 493                 len = sizeof(wpa_s->sme.assoc_req_ie) -
 494                         wpa_s->sme.assoc_req_ie_len;
 495                 if (wpabuf_len(buf) <= len) {
 496                         os_memcpy(wpa_s->sme.assoc_req_ie +
 497                                   wpa_s->sme.assoc_req_ie_len,
 498                                   wpabuf_head(buf), wpabuf_len(buf));
 499                         wpa_s->sme.assoc_req_ie_len += wpabuf_len(buf);
 500                 }
 501         }
 502
 503 #ifdef CONFIG_MBO
 504         if (mbo) {
 505                 int len;
 506
 507                 len = wpas_mbo_ie(wpa_s, wpa_s->sme.assoc_req_ie +
 508                                   wpa_s->sme.assoc_req_ie_len,
 509                                   sizeof(wpa_s->sme.assoc_req_ie) -
 510                                   wpa_s->sme.assoc_req_ie_len);
 511                 if (len >= 0)
 512                         wpa_s->sme.assoc_req_ie_len += len;
 513         }
 514 #endif /* CONFIG_MBO */
 515
 516 #ifdef CONFIG_SAE
 517         if (!skip_auth && params.auth_alg == WPA_AUTH_ALG_SAE &&
 518             pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid, ssid, 0) == 0)
 519         {
 520                 wpa_dbg(wpa_s, MSG_DEBUG,
 521                         "PMKSA cache entry found - try to use PMKSA caching instead of new SAE authentication");
 522                 params.auth_alg = WPA_AUTH_ALG_OPEN;
 523                 wpa_s->sme.sae_pmksa_caching = 1;
 524         }
 525
 526         if (!skip_auth && params.auth_alg == WPA_AUTH_ALG_SAE) {
 527                 if (start)
 528                         resp = sme_auth_build_sae_commit(wpa_s, ssid,
 529                                                          bss->bssid);
 530                 else
 531                         resp = sme_auth_build_sae_confirm(wpa_s);
 532                 if (resp == NULL) {
 533                         wpas_connection_failed(wpa_s, bss->bssid);
 534                         return;
 535                 }
 536                 params.sae_data = wpabuf_head(resp);
 537                 params.sae_data_len = wpabuf_len(resp);
 538                 wpa_s->sme.sae.state = start ? SAE_COMMITTED : SAE_CONFIRMED;
 539         }
 540 #endif /* CONFIG_SAE */
 541
 542         wpa_supplicant_cancel_sched_scan(wpa_s);
 543         wpa_supplicant_cancel_scan(wpa_s);
 544
 545         wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
 546                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 547                 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
 548
 549         wpa_clear_keys(wpa_s, bss->bssid);
 550         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 551         old_ssid = wpa_s->current_ssid;
 552         wpa_s->current_ssid = ssid;
 553         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
 554         wpa_supplicant_initiate_eapol(wpa_s);
 555         if (old_ssid != wpa_s->current_ssid)
 556                 wpas_notify_network_changed(wpa_s);
 557
 558 #ifdef CONFIG_P2P
 559         /*
 560          * If multi-channel concurrency is not supported, check for any
 561          * frequency conflict. In case of any frequency conflict, remove the
 562          * least prioritized connection.
 563          */
 564         if (wpa_s->num_multichan_concurrent < 2) {
 565                 int freq, num;
 566                 num = get_shared_radio_freqs(wpa_s, &freq, 1);
 567                 if (num > 0 && freq > 0 && freq != params.freq) {
 568                         wpa_printf(MSG_DEBUG,
 569                                    "Conflicting frequency found (%d != %d)",
 570                                    freq, params.freq);
 571                         if (wpas_p2p_handle_frequency_conflicts(wpa_s,
 572                                                                 params.freq,
 573                                                                 ssid) < 0) {
 574                                 wpas_connection_failed(wpa_s, bss->bssid);
 575                                 wpa_supplicant_mark_disassoc(wpa_s);
 576                                 wpabuf_free(resp);
 577                                 wpas_connect_work_done(wpa_s);
 578                                 return;
 579                         }
 580                 }
 581         }
 582 #endif /* CONFIG_P2P */
 583
 584         if (skip_auth) {
 585                 wpa_msg(wpa_s, MSG_DEBUG,
 586                         "SME: Skip authentication step on reassoc-to-same-BSS");
 587                 wpabuf_free(resp);
 588                 sme_associate(wpa_s, ssid->mode, bss->bssid, WLAN_AUTH_OPEN);
 589                 return;
 590         }
 591
 592
 593         wpa_s->sme.auth_alg = params.auth_alg;
 594         if (wpa_drv_authenticate(wpa_s, &params) < 0) {
 595                 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
 596                         "driver failed");
 597                 wpas_connection_failed(wpa_s, bss->bssid);
 598                 wpa_supplicant_mark_disassoc(wpa_s);
 599                 wpabuf_free(resp);
 600                 wpas_connect_work_done(wpa_s);
 601                 return;
 602         }
 603
 604         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 605                                NULL);
 606
 607         /*
 608          * Association will be started based on the authentication event from
 609          * the driver.
 610          */
 611
 612         wpabuf_free(resp);
 613 }
 614
 615
 616 static void sme_auth_start_cb(struct wpa_radio_work *work, int deinit)
 617 {
 618         struct wpa_connect_work *cwork = work->ctx;
 619         struct wpa_supplicant *wpa_s = work->wpa_s;
 620
 621         if (deinit) {
 622                 if (work->started)
 623                         wpa_s->connect_work = NULL;
 624
 625                 wpas_connect_work_free(cwork);
 626                 return;
 627         }
 628
 629         wpa_s->connect_work = work;
 630
 631         if (cwork->bss_removed ||
 632             !wpas_valid_bss_ssid(wpa_s, cwork->bss, cwork->ssid) ||
 633             wpas_network_disabled(wpa_s, cwork->ssid)) {
 634                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: BSS/SSID entry for authentication not valid anymore - drop connection attempt");
 635                 wpas_connect_work_done(wpa_s);
 636                 return;
 637         }
 638
 639         sme_send_authentication(wpa_s, cwork->bss, cwork->ssid, 1);
 640 }
 641
 642
 643 void sme_authenticate(struct wpa_supplicant *wpa_s,
 644                       struct wpa_bss *bss, struct wpa_ssid *ssid)
 645 {
 646         struct wpa_connect_work *cwork;
 647
 648         if (bss == NULL || ssid == NULL)
 649                 return;
 650         if (wpa_s->connect_work) {
 651                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reject sme_authenticate() call since connect_work exist");
 652                 return;
 653         }
 654
 655         if (radio_work_pending(wpa_s, "sme-connect")) {
 656                 /*
 657                  * The previous sme-connect work might no longer be valid due to
 658                  * the fact that the BSS list was updated. In addition, it makes
 659                  * sense to adhere to the 'newer' decision.
 660                  */
 661                 wpa_dbg(wpa_s, MSG_DEBUG,
 662                         "SME: Remove previous pending sme-connect");
 663                 radio_remove_works(wpa_s, "sme-connect", 0);
 664         }
 665
 666         wpas_abort_ongoing_scan(wpa_s);
 667
 668         cwork = os_zalloc(sizeof(*cwork));
 669         if (cwork == NULL)
 670                 return;
 671         cwork->bss = bss;
 672         cwork->ssid = ssid;
 673         cwork->sme = 1;
 674
 675 #ifdef CONFIG_SAE
 676         wpa_s->sme.sae.state = SAE_NOTHING;
 677         wpa_s->sme.sae.send_confirm = 0;
 678         wpa_s->sme.sae_group_index = 0;
 679 #endif /* CONFIG_SAE */
 680
 681         if (radio_add_work(wpa_s, bss->freq, "sme-connect", 1,
 682                            sme_auth_start_cb, cwork) < 0)
 683                 wpas_connect_work_free(cwork);
 684 }
 685
 686
 687 #ifdef CONFIG_SAE
 688
 689 static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
 690                         u16 status_code, const u8 *data, size_t len)
 691 {
 692         int *groups;
 693
 694         wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
 695                 "status code %u", auth_transaction, status_code);
 696
 697         if (auth_transaction == 1 &&
 698             status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
 699             wpa_s->sme.sae.state == SAE_COMMITTED &&
 700             wpa_s->current_bss && wpa_s->current_ssid) {
 701                 int default_groups[] = { 19, 20, 21, 25, 26, 0 };
 702                 u16 group;
 703
 704                 groups = wpa_s->conf->sae_groups;
 705                 if (!groups || groups[0] <= 0)
 706                         groups = default_groups;
 707
 708                 if (len < sizeof(le16)) {
 709                         wpa_dbg(wpa_s, MSG_DEBUG,
 710                                 "SME: Too short SAE anti-clogging token request");
 711                         return -1;
 712                 }
 713                 group = WPA_GET_LE16(data);
 714                 wpa_dbg(wpa_s, MSG_DEBUG,
 715                         "SME: SAE anti-clogging token requested (group %u)",
 716                         group);
 717                 if (sae_group_allowed(&wpa_s->sme.sae, groups, group) !=
 718                     WLAN_STATUS_SUCCESS) {
 719                         wpa_dbg(wpa_s, MSG_ERROR,
 720                                 "SME: SAE group %u of anti-clogging request is invalid",
 721                                 group);
 722                         return -1;
 723                 }
 724                 wpabuf_free(wpa_s->sme.sae_token);
 725                 wpa_s->sme.sae_token = wpabuf_alloc_copy(data + sizeof(le16),
 726                                                          len - sizeof(le16));
 727                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 728                                         wpa_s->current_ssid, 1);
 729                 return 0;
 730         }
 731
 732         if (auth_transaction == 1 &&
 733             status_code == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED &&
 734             wpa_s->sme.sae.state == SAE_COMMITTED &&
 735             wpa_s->current_bss && wpa_s->current_ssid) {
 736                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE group not supported");
 737                 wpa_s->sme.sae_group_index++;
 738                 if (sme_set_sae_group(wpa_s) < 0)
 739                         return -1; /* no other groups enabled */
 740                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Try next enabled SAE group");
 741                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 742                                         wpa_s->current_ssid, 1);
 743                 return 0;
 744         }
 745
 746         if (status_code != WLAN_STATUS_SUCCESS)
 747                 return -1;
 748
 749         if (auth_transaction == 1) {
 750                 u16 res;
 751
 752                 groups = wpa_s->conf->sae_groups;
 753
 754                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
 755                 if (wpa_s->current_bss == NULL ||
 756                     wpa_s->current_ssid == NULL)
 757                         return -1;
 758                 if (wpa_s->sme.sae.state != SAE_COMMITTED)
 759                         return -1;
 760                 if (groups && groups[0] <= 0)
 761                         groups = NULL;
 762                 res = sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL,
 763                                        groups);
 764                 if (res == SAE_SILENTLY_DISCARD) {
 765                         wpa_printf(MSG_DEBUG,
 766                                    "SAE: Drop commit message due to reflection attack");
 767                         return 0;
 768                 }
 769                 if (res != WLAN_STATUS_SUCCESS)
 770                         return -1;
 771
 772                 if (sae_process_commit(&wpa_s->sme.sae) < 0) {
 773                         wpa_printf(MSG_DEBUG, "SAE: Failed to process peer "
 774                                    "commit");
 775                         return -1;
 776                 }
 777
 778                 wpabuf_free(wpa_s->sme.sae_token);
 779                 wpa_s->sme.sae_token = NULL;
 780                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 781                                         wpa_s->current_ssid, 0);
 782                 return 0;
 783         } else if (auth_transaction == 2) {
 784                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
 785                 if (wpa_s->sme.sae.state != SAE_CONFIRMED)
 786                         return -1;
 787                 if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0)
 788                         return -1;
 789                 wpa_s->sme.sae.state = SAE_ACCEPTED;
 790                 sae_clear_temp_data(&wpa_s->sme.sae);
 791                 return 1;
 792         }
 793
 794         return -1;
 795 }
 796 #endif /* CONFIG_SAE */
 797
 798
 799 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
 800 {
 801         struct wpa_ssid *ssid = wpa_s->current_ssid;
 802
 803         if (ssid == NULL) {
 804                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 805                         "when network is not selected");
 806                 return;
 807         }
 808
 809         if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
 810                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 811                         "when not in authenticating state");
 812                 return;
 813         }
 814
 815         if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
 816                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
 817                         "unexpected peer " MACSTR,
 818                         MAC2STR(data->auth.peer));
 819                 return;
 820         }
 821
 822         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
 823                 " auth_type=%d auth_transaction=%d status_code=%d",
 824                 MAC2STR(data->auth.peer), data->auth.auth_type,
 825                 data->auth.auth_transaction, data->auth.status_code);
 826         wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
 827                     data->auth.ies, data->auth.ies_len);
 828
 829         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 830
 831 #ifdef CONFIG_SAE
 832         if (data->auth.auth_type == WLAN_AUTH_SAE) {
 833                 int res;
 834                 res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
 835                                    data->auth.status_code, data->auth.ies,
 836                                    data->auth.ies_len);
 837                 if (res < 0) {
 838                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 839                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 840
 841                 }
 842                 if (res != 1)
 843                         return;
 844
 845                 wpa_printf(MSG_DEBUG, "SME: SAE completed - setting PMK for "
 846                            "4-way handshake");
 847                 wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN,
 848                                wpa_s->sme.sae.pmkid, wpa_s->pending_bssid);
 849         }
 850 #endif /* CONFIG_SAE */
 851
 852         if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
 853                 char *ie_txt = NULL;
 854
 855                 if (data->auth.ies && data->auth.ies_len) {
 856                         size_t buflen = 2 * data->auth.ies_len + 1;
 857                         ie_txt = os_malloc(buflen);
 858                         if (ie_txt) {
 859                                 wpa_snprintf_hex(ie_txt, buflen, data->auth.ies,
 860                                                  data->auth.ies_len);
 861                         }
 862                 }
 863                 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_AUTH_REJECT MACSTR
 864                         " auth_type=%u auth_transaction=%u status_code=%u ie=%s",
 865                         MAC2STR(data->auth.peer), data->auth.auth_type,
 866                         data->auth.auth_transaction, data->auth.status_code,
 867                         ie_txt);
 868                 os_free(ie_txt);
 869
 870                 if (data->auth.status_code !=
 871                     WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
 872                     wpa_s->sme.auth_alg == data->auth.auth_type ||
 873                     wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
 874                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 875                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 876                         return;
 877                 }
 878
 879                 wpas_connect_work_done(wpa_s);
 880
 881                 switch (data->auth.auth_type) {
 882                 case WLAN_AUTH_OPEN:
 883                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 884
 885                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
 886                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 887                                                  wpa_s->current_ssid);
 888                         return;
 889
 890                 case WLAN_AUTH_SHARED_KEY:
 891                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
 892
 893                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
 894                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 895                                                  wpa_s->current_ssid);
 896                         return;
 897
 898                 default:
 899                         return;
 900                 }
 901         }
 902
 903 #ifdef CONFIG_IEEE80211R
 904         if (data->auth.auth_type == WLAN_AUTH_FT) {
 905                 if (wpa_ft_process_response(wpa_s->wpa, data->auth.ies,
 906                                             data->auth.ies_len, 0,
 907                                             data->auth.peer, NULL, 0) < 0) {
 908                         wpa_dbg(wpa_s, MSG_DEBUG,
 909                                 "SME: FT Authentication response processing failed");
 910                         wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "bssid="
 911                                 MACSTR
 912                                 " reason=%d locally_generated=1",
 913                                 MAC2STR(wpa_s->pending_bssid),
 914                                 WLAN_REASON_DEAUTH_LEAVING);
 915                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 916                         wpa_supplicant_mark_disassoc(wpa_s);
 917                         return;
 918                 }
 919         }
 920 #endif /* CONFIG_IEEE80211R */
 921
 922         sme_associate(wpa_s, ssid->mode, data->auth.peer,
 923                       data->auth.auth_type);
 924 }
 925
 926
 927 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
 928                    const u8 *bssid, u16 auth_type)
 929 {
 930         struct wpa_driver_associate_params params;
 931         struct ieee802_11_elems elems;
 932 #ifdef CONFIG_HT_OVERRIDES
 933         struct ieee80211_ht_capabilities htcaps;
 934         struct ieee80211_ht_capabilities htcaps_mask;
 935 #endif /* CONFIG_HT_OVERRIDES */
 936 #ifdef CONFIG_VHT_OVERRIDES
 937         struct ieee80211_vht_capabilities vhtcaps;
 938         struct ieee80211_vht_capabilities vhtcaps_mask;
 939 #endif /* CONFIG_VHT_OVERRIDES */
 940
 941         os_memset(&params, 0, sizeof(params));
 942         params.bssid = bssid;
 943         params.ssid = wpa_s->sme.ssid;
 944         params.ssid_len = wpa_s->sme.ssid_len;
 945         params.freq.freq = wpa_s->sme.freq;
 946         params.bg_scan_period = wpa_s->current_ssid ?
 947                 wpa_s->current_ssid->bg_scan_period : -1;
 948         params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
 949                 wpa_s->sme.assoc_req_ie : NULL;
 950         params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
 951         params.pairwise_suite = wpa_s->pairwise_cipher;
 952         params.group_suite = wpa_s->group_cipher;
 953         params.key_mgmt_suite = wpa_s->key_mgmt;
 954         params.wpa_proto = wpa_s->wpa_proto;
 955 #ifdef CONFIG_HT_OVERRIDES
 956         os_memset(&htcaps, 0, sizeof(htcaps));
 957         os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
 958         params.htcaps = (u8 *) &htcaps;
 959         params.htcaps_mask = (u8 *) &htcaps_mask;
 960         wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, &params);
 961 #endif /* CONFIG_HT_OVERRIDES */
 962 #ifdef CONFIG_VHT_OVERRIDES
 963         os_memset(&vhtcaps, 0, sizeof(vhtcaps));
 964         os_memset(&vhtcaps_mask, 0, sizeof(vhtcaps_mask));
 965         params.vhtcaps = &vhtcaps;
 966         params.vhtcaps_mask = &vhtcaps_mask;
 967         wpa_supplicant_apply_vht_overrides(wpa_s, wpa_s->current_ssid, &params);
 968 #endif /* CONFIG_VHT_OVERRIDES */
 969 #ifdef CONFIG_IEEE80211R
 970         if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
 971                 params.wpa_ie = wpa_s->sme.ft_ies;
 972                 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
 973         }
 974 #endif /* CONFIG_IEEE80211R */
 975         params.mode = mode;
 976         params.mgmt_frame_protection = wpa_s->sme.mfp;
 977         params.rrm_used = wpa_s->rrm.rrm_used;
 978         if (wpa_s->sme.prev_bssid_set)
 979                 params.prev_bssid = wpa_s->sme.prev_bssid;
 980
 981         wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
 982                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 983                 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
 984                 params.freq.freq);
 985
 986         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
 987
 988         if (params.wpa_ie == NULL ||
 989             ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
 990             < 0) {
 991                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
 992                 os_memset(&elems, 0, sizeof(elems));
 993         }
 994         if (elems.rsn_ie) {
 995                 params.wpa_proto = WPA_PROTO_RSN;
 996                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
 997                                         elems.rsn_ie_len + 2);
 998         } else if (elems.wpa_ie) {
 999                 params.wpa_proto = WPA_PROTO_WPA;
1000                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
1001                                         elems.wpa_ie_len + 2);
1002         } else if (elems.osen) {
1003                 params.wpa_proto = WPA_PROTO_OSEN;
1004                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.osen - 2,
1005                                         elems.osen_len + 2);
1006         } else
1007                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
1008         if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
1009                 params.p2p = 1;
1010
1011         if (wpa_s->parent->set_sta_uapsd)
1012                 params.uapsd = wpa_s->parent->sta_uapsd;
1013         else
1014                 params.uapsd = -1;
1015
1016         if (wpa_drv_associate(wpa_s, &params) < 0) {
1017                 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
1018                         "driver failed");
1019                 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1020                 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
1021                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1022                 return;
1023         }
1024
1025         eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
1026                                NULL);
1027 }
1028
1029
1030 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
1031                       const u8 *ies, size_t ies_len)
1032 {
1033         if (md == NULL || ies == NULL) {
1034                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
1035                 os_free(wpa_s->sme.ft_ies);
1036                 wpa_s->sme.ft_ies = NULL;
1037                 wpa_s->sme.ft_ies_len = 0;
1038                 wpa_s->sme.ft_used = 0;
1039                 return 0;
1040         }
1041
1042         os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
1043         wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
1044         os_free(wpa_s->sme.ft_ies);
1045         wpa_s->sme.ft_ies = os_malloc(ies_len);
1046         if (wpa_s->sme.ft_ies == NULL)
1047                 return -1;
1048         os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
1049         wpa_s->sme.ft_ies_len = ies_len;
1050         return 0;
1051 }
1052
1053
1054 static void sme_deauth(struct wpa_supplicant *wpa_s)
1055 {
1056         int bssid_changed;
1057
1058         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
1059
1060         if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
1061                                    WLAN_REASON_DEAUTH_LEAVING) < 0) {
1062                 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
1063                         "failed");
1064         }
1065         wpa_s->sme.prev_bssid_set = 0;
1066
1067         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1068         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
1069         os_memset(wpa_s->bssid, 0, ETH_ALEN);
1070         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1071         if (bssid_changed)
1072                 wpas_notify_bssid_changed(wpa_s);
1073 }
1074
1075
1076 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
1077                             union wpa_event_data *data)
1078 {
1079         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
1080                 "status code %d", MAC2STR(wpa_s->pending_bssid),
1081                 data->assoc_reject.status_code);
1082
1083         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1084
1085 #ifdef CONFIG_SAE
1086         if (wpa_s->sme.sae_pmksa_caching && wpa_s->current_ssid &&
1087             wpa_key_mgmt_sae(wpa_s->current_ssid->key_mgmt)) {
1088                 wpa_dbg(wpa_s, MSG_DEBUG,
1089                         "PMKSA caching attempt rejected - drop PMKSA cache entry and fall back to SAE authentication");
1090                 wpa_sm_aborted_cached(wpa_s->wpa);
1091                 wpa_sm_pmksa_cache_flush(wpa_s->wpa, wpa_s->current_ssid);
1092                 if (wpa_s->current_bss) {
1093                         struct wpa_bss *bss = wpa_s->current_bss;
1094                         struct wpa_ssid *ssid = wpa_s->current_ssid;
1095
1096                         wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
1097                                                WLAN_REASON_DEAUTH_LEAVING);
1098                         wpas_connect_work_done(wpa_s);
1099                         wpa_supplicant_mark_disassoc(wpa_s);
1100                         wpa_supplicant_connect(wpa_s, bss, ssid);
1101                         return;
1102                 }
1103         }
1104 #endif /* CONFIG_SAE */
1105
1106         /*
1107          * For now, unconditionally terminate the previous authentication. In
1108          * theory, this should not be needed, but mac80211 gets quite confused
1109          * if the authentication is left pending.. Some roaming cases might
1110          * benefit from using the previous authentication, so this could be
1111          * optimized in the future.
1112          */
1113         sme_deauth(wpa_s);
1114 }
1115
1116
1117 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
1118                               union wpa_event_data *data)
1119 {
1120         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
1121         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1122         wpa_supplicant_mark_disassoc(wpa_s);
1123 }
1124
1125
1126 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
1127                                union wpa_event_data *data)
1128 {
1129         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
1130         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1131         wpa_supplicant_mark_disassoc(wpa_s);
1132 }
1133
1134
1135 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
1136                         struct disassoc_info *info)
1137 {
1138         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
1139         if (wpa_s->sme.prev_bssid_set) {
1140                 /*
1141                  * cfg80211/mac80211 can get into somewhat confused state if
1142                  * the AP only disassociates us and leaves us in authenticated
1143                  * state. For now, force the state to be cleared to avoid
1144                  * confusing errors if we try to associate with the AP again.
1145                  */
1146                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
1147                         "driver state");
1148                 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
1149                                        WLAN_REASON_DEAUTH_LEAVING);
1150         }
1151 }
1152
1153
1154 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
1155 {
1156         struct wpa_supplicant *wpa_s = eloop_ctx;
1157         if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
1158                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
1159                 sme_deauth(wpa_s);
1160         }
1161 }
1162
1163
1164 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
1165 {
1166         struct wpa_supplicant *wpa_s = eloop_ctx;
1167         if (wpa_s->wpa_state == WPA_ASSOCIATING) {
1168                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
1169                 sme_deauth(wpa_s);
1170         }
1171 }
1172
1173
1174 void sme_state_changed(struct wpa_supplicant *wpa_s)
1175 {
1176         /* Make sure timers are cleaned up appropriately. */
1177         if (wpa_s->wpa_state != WPA_ASSOCIATING)
1178                 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1179         if (wpa_s->wpa_state != WPA_AUTHENTICATING)
1180                 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1181 }
1182
1183
1184 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
1185                                        const u8 *prev_pending_bssid)
1186 {
1187         /*
1188          * mac80211-workaround to force deauth on failed auth cmd,
1189          * requires us to remain in authenticating state to allow the
1190          * second authentication attempt to be continued properly.
1191          */
1192         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
1193                 "to proceed after disconnection event");
1194         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
1195         os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
1196
1197         /*
1198          * Re-arm authentication timer in case auth fails for whatever reason.
1199          */
1200         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1201         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
1202                                NULL);
1203 }
1204
1205
1206 void sme_clear_on_disassoc(struct wpa_supplicant *wpa_s)
1207 {
1208         wpa_s->sme.prev_bssid_set = 0;
1209 #ifdef CONFIG_SAE
1210         wpabuf_free(wpa_s->sme.sae_token);
1211         wpa_s->sme.sae_token = NULL;
1212         sae_clear_data(&wpa_s->sme.sae);
1213 #endif /* CONFIG_SAE */
1214 #ifdef CONFIG_IEEE80211R
1215         if (wpa_s->sme.ft_ies)
1216                 sme_update_ft_ies(wpa_s, NULL, NULL, 0);
1217 #endif /* CONFIG_IEEE80211R */
1218 }
1219
1220
1221 void sme_deinit(struct wpa_supplicant *wpa_s)
1222 {
1223         os_free(wpa_s->sme.ft_ies);
1224         wpa_s->sme.ft_ies = NULL;
1225         wpa_s->sme.ft_ies_len = 0;
1226 #ifdef CONFIG_IEEE80211W
1227         sme_stop_sa_query(wpa_s);
1228 #endif /* CONFIG_IEEE80211W */
1229         sme_clear_on_disassoc(wpa_s);
1230
1231         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1232         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1233         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1234 }
1235
1236
1237 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
1238                                    const u8 *chan_list, u8 num_channels,
1239                                    u8 num_intol)
1240 {
1241         struct ieee80211_2040_bss_coex_ie *bc_ie;
1242         struct ieee80211_2040_intol_chan_report *ic_report;
1243         struct wpabuf *buf;
1244
1245         wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR
1246                    " (num_channels=%u num_intol=%u)",
1247                    MAC2STR(wpa_s->bssid), num_channels, num_intol);
1248         wpa_hexdump(MSG_DEBUG, "SME: 20/40 BSS Intolerant Channels",
1249                     chan_list, num_channels);
1250
1251         buf = wpabuf_alloc(2 + /* action.category + action_code */
1252                            sizeof(struct ieee80211_2040_bss_coex_ie) +
1253                            sizeof(struct ieee80211_2040_intol_chan_report) +
1254                            num_channels);
1255         if (buf == NULL)
1256                 return;
1257
1258         wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
1259         wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
1260
1261         bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
1262         bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
1263         bc_ie->length = 1;
1264         if (num_intol)
1265                 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
1266
1267         if (num_channels > 0) {
1268                 ic_report = wpabuf_put(buf, sizeof(*ic_report));
1269                 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
1270                 ic_report->length = num_channels + 1;
1271                 ic_report->op_class = 0;
1272                 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
1273                           num_channels);
1274         }
1275
1276         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1277                                 wpa_s->own_addr, wpa_s->bssid,
1278                                 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
1279                 wpa_msg(wpa_s, MSG_INFO,
1280                         "SME: Failed to send 20/40 BSS Coexistence frame");
1281         }
1282
1283         wpabuf_free(buf);
1284 }
1285
1286
1287 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
1288 {
1289         struct wpa_bss *bss;
1290         const u8 *ie;
1291         u16 ht_cap;
1292         u8 chan_list[P2P_MAX_CHANNELS], channel;
1293         u8 num_channels = 0, num_intol = 0, i;
1294
1295         if (!wpa_s->sme.sched_obss_scan)
1296                 return 0;
1297
1298         wpa_s->sme.sched_obss_scan = 0;
1299         if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
1300                 return 1;
1301
1302         /*
1303          * Check whether AP uses regulatory triplet or channel triplet in
1304          * country info. Right now the operating class of the BSS channel
1305          * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
1306          * based on the assumption that operating class triplet is not used in
1307          * beacon frame. If the First Channel Number/Operating Extension
1308          * Identifier octet has a positive integer value of 201 or greater,
1309          * then its operating class triplet.
1310          *
1311          * TODO: If Supported Operating Classes element is present in beacon
1312          * frame, have to lookup operating class in Annex E and fill them in
1313          * 2040 coex frame.
1314          */
1315         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
1316         if (ie && (ie[1] >= 6) && (ie[5] >= 201))
1317                 return 1;
1318
1319         os_memset(chan_list, 0, sizeof(chan_list));
1320
1321         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1322                 /* Skip other band bss */
1323                 enum hostapd_hw_mode mode;
1324                 mode = ieee80211_freq_to_chan(bss->freq, &channel);
1325                 if (mode != HOSTAPD_MODE_IEEE80211G &&
1326                     mode != HOSTAPD_MODE_IEEE80211B)
1327                         continue;
1328
1329                 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
1330                 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
1331                 wpa_printf(MSG_DEBUG, "SME OBSS scan BSS " MACSTR
1332                            " freq=%u chan=%u ht_cap=0x%x",
1333                            MAC2STR(bss->bssid), bss->freq, channel, ht_cap);
1334
1335                 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
1336                         if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
1337                                 num_intol++;
1338
1339                         /* Check whether the channel is already considered */
1340                         for (i = 0; i < num_channels; i++) {
1341                                 if (channel == chan_list[i])
1342                                         break;
1343                         }
1344                         if (i != num_channels)
1345                                 continue;
1346
1347                         chan_list[num_channels++] = channel;
1348                 }
1349         }
1350
1351         sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
1352         return 1;
1353 }
1354
1355
1356 static void wpa_obss_scan_freqs_list(struct wpa_supplicant *wpa_s,
1357                                      struct wpa_driver_scan_params *params)
1358 {
1359         /* Include only affected channels */
1360         struct hostapd_hw_modes *mode;
1361         int count, i;
1362         int start, end;
1363
1364         mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes,
1365                         HOSTAPD_MODE_IEEE80211G);
1366         if (mode == NULL) {
1367                 /* No channels supported in this band - use empty list */
1368                 params->freqs = os_zalloc(sizeof(int));
1369                 return;
1370         }
1371
1372         if (wpa_s->sme.ht_sec_chan == HT_SEC_CHAN_UNKNOWN &&
1373             wpa_s->current_bss) {
1374                 const u8 *ie;
1375
1376                 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_OPERATION);
1377                 if (ie && ie[1] >= 2) {
1378                         u8 o;
1379
1380                         o = ie[3] & HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK;
1381                         if (o == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
1382                                 wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_ABOVE;
1383                         else if (o == HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
1384                                 wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_BELOW;
1385                 }
1386         }
1387
1388         start = wpa_s->assoc_freq - 10;
1389         end = wpa_s->assoc_freq + 10;
1390         switch (wpa_s->sme.ht_sec_chan) {
1391         case HT_SEC_CHAN_UNKNOWN:
1392                 /* HT40+ possible on channels 1..9 */
1393                 if (wpa_s->assoc_freq <= 2452)
1394                         start -= 20;
1395                 /* HT40- possible on channels 5-13 */
1396                 if (wpa_s->assoc_freq >= 2432)
1397                         end += 20;
1398                 break;
1399         case HT_SEC_CHAN_ABOVE:
1400                 end += 20;
1401                 break;
1402         case HT_SEC_CHAN_BELOW:
1403                 start -= 20;
1404                 break;
1405         }
1406         wpa_printf(MSG_DEBUG,
1407                    "OBSS: assoc_freq %d possible affected range %d-%d",
1408                    wpa_s->assoc_freq, start, end);
1409
1410         params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
1411         if (params->freqs == NULL)
1412                 return;
1413         for (count = 0, i = 0; i < mode->num_channels; i++) {
1414                 int freq;
1415
1416                 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
1417                         continue;
1418                 freq = mode->channels[i].freq;
1419                 if (freq - 10 >= end || freq + 10 <= start)
1420                         continue; /* not affected */
1421                 params->freqs[count++] = freq;
1422         }
1423 }
1424
1425
1426 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1427 {
1428         struct wpa_supplicant *wpa_s = eloop_ctx;
1429         struct wpa_driver_scan_params params;
1430
1431         if (!wpa_s->current_bss) {
1432                 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
1433                 return;
1434         }
1435
1436         os_memset(&params, 0, sizeof(params));
1437         wpa_obss_scan_freqs_list(wpa_s, &params);
1438         params.low_priority = 1;
1439         wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
1440
1441         if (wpa_supplicant_trigger_scan(wpa_s, &params))
1442                 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
1443         else
1444                 wpa_s->sme.sched_obss_scan = 1;
1445         os_free(params.freqs);
1446
1447         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1448                                sme_obss_scan_timeout, wpa_s, NULL);
1449 }
1450
1451
1452 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
1453 {
1454         const u8 *ie;
1455         struct wpa_bss *bss = wpa_s->current_bss;
1456         struct wpa_ssid *ssid = wpa_s->current_ssid;
1457         struct hostapd_hw_modes *hw_mode = NULL;
1458         int i;
1459
1460         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1461         wpa_s->sme.sched_obss_scan = 0;
1462         wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_UNKNOWN;
1463         if (!enable)
1464                 return;
1465
1466         /*
1467          * Schedule OBSS scan if driver is using station SME in wpa_supplicant
1468          * or it expects OBSS scan to be performed by wpa_supplicant.
1469          */
1470         if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
1471               (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
1472             ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
1473                 return;
1474
1475         if (!wpa_s->hw.modes)
1476                 return;
1477
1478         /* only HT caps in 11g mode are relevant */
1479         for (i = 0; i < wpa_s->hw.num_modes; i++) {
1480                 hw_mode = &wpa_s->hw.modes[i];
1481                 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
1482                         break;
1483         }
1484
1485         /* Driver does not support HT40 for 11g or doesn't have 11g. */
1486         if (i == wpa_s->hw.num_modes || !hw_mode ||
1487             !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1488                 return;
1489
1490         if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
1491                 return; /* Not associated on 2.4 GHz band */
1492
1493         /* Check whether AP supports HT40 */
1494         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
1495         if (!ie || ie[1] < 2 ||
1496             !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1497                 return; /* AP does not support HT40 */
1498
1499         ie = wpa_bss_get_ie(wpa_s->current_bss,
1500                             WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
1501         if (!ie || ie[1] < 14)
1502                 return; /* AP does not request OBSS scans */
1503
1504         wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
1505         if (wpa_s->sme.obss_scan_int < 10) {
1506                 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
1507                            "replaced with the minimum 10 sec",
1508                            wpa_s->sme.obss_scan_int);
1509                 wpa_s->sme.obss_scan_int = 10;
1510         }
1511         wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
1512                    wpa_s->sme.obss_scan_int);
1513         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1514                                sme_obss_scan_timeout, wpa_s, NULL);
1515 }
1516
1517
1518 #ifdef CONFIG_IEEE80211W
1519
1520 static const unsigned int sa_query_max_timeout = 1000;
1521 static const unsigned int sa_query_retry_timeout = 201;
1522
1523 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
1524 {
1525         u32 tu;
1526         struct os_reltime now, passed;
1527         os_get_reltime(&now);
1528         os_reltime_sub(&now, &wpa_s->sme.sa_query_start, &passed);
1529         tu = (passed.sec * 1000000 + passed.usec) / 1024;
1530         if (sa_query_max_timeout < tu) {
1531                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
1532                 sme_stop_sa_query(wpa_s);
1533                 wpa_supplicant_deauthenticate(
1534                         wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
1535                 return 1;
1536         }
1537
1538         return 0;
1539 }
1540
1541
1542 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
1543                                   const u8 *trans_id)
1544 {
1545         u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
1546         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
1547                 MACSTR, MAC2STR(wpa_s->bssid));
1548         wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
1549                     trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1550         req[0] = WLAN_ACTION_SA_QUERY;
1551         req[1] = WLAN_SA_QUERY_REQUEST;
1552         os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1553         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1554                                 wpa_s->own_addr, wpa_s->bssid,
1555                                 req, sizeof(req), 0) < 0)
1556                 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
1557                         "Request");
1558 }
1559
1560
1561 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
1562 {
1563         struct wpa_supplicant *wpa_s = eloop_ctx;
1564         unsigned int timeout, sec, usec;
1565         u8 *trans_id, *nbuf;
1566
1567         if (wpa_s->sme.sa_query_count > 0 &&
1568             sme_check_sa_query_timeout(wpa_s))
1569                 return;
1570
1571         nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
1572                                 wpa_s->sme.sa_query_count + 1,
1573                                 WLAN_SA_QUERY_TR_ID_LEN);
1574         if (nbuf == NULL)
1575                 return;
1576         if (wpa_s->sme.sa_query_count == 0) {
1577                 /* Starting a new SA Query procedure */
1578                 os_get_reltime(&wpa_s->sme.sa_query_start);
1579         }
1580         trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
1581         wpa_s->sme.sa_query_trans_id = nbuf;
1582         wpa_s->sme.sa_query_count++;
1583
1584         if (os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN) < 0) {
1585                 wpa_printf(MSG_DEBUG, "Could not generate SA Query ID");
1586                 return;
1587         }
1588
1589         timeout = sa_query_retry_timeout;
1590         sec = ((timeout / 1000) * 1024) / 1000;
1591         usec = (timeout % 1000) * 1024;
1592         eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
1593
1594         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
1595                 wpa_s->sme.sa_query_count);
1596
1597         sme_send_sa_query_req(wpa_s, trans_id);
1598 }
1599
1600
1601 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
1602 {
1603         sme_sa_query_timer(wpa_s, NULL);
1604 }
1605
1606
1607 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
1608 {
1609         eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
1610         os_free(wpa_s->sme.sa_query_trans_id);
1611         wpa_s->sme.sa_query_trans_id = NULL;
1612         wpa_s->sme.sa_query_count = 0;
1613 }
1614
1615
1616 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1617                                  const u8 *da, u16 reason_code)
1618 {
1619         struct wpa_ssid *ssid;
1620         struct os_reltime now;
1621
1622         if (wpa_s->wpa_state != WPA_COMPLETED)
1623                 return;
1624         ssid = wpa_s->current_ssid;
1625         if (wpas_get_ssid_pmf(wpa_s, ssid) == NO_MGMT_FRAME_PROTECTION)
1626                 return;
1627         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1628                 return;
1629         if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1630             reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1631                 return;
1632         if (wpa_s->sme.sa_query_count > 0)
1633                 return;
1634
1635         os_get_reltime(&now);
1636         if (wpa_s->sme.last_unprot_disconnect.sec &&
1637             !os_reltime_expired(&now, &wpa_s->sme.last_unprot_disconnect, 10))
1638                 return; /* limit SA Query procedure frequency */
1639         wpa_s->sme.last_unprot_disconnect = now;
1640
1641         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1642                 "possible AP/STA state mismatch - trigger SA Query");
1643         sme_start_sa_query(wpa_s);
1644 }
1645
1646
1647 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1648                      const u8 *data, size_t len)
1649 {
1650         int i;
1651
1652         if (wpa_s->sme.sa_query_trans_id == NULL ||
1653             len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1654             data[0] != WLAN_SA_QUERY_RESPONSE)
1655                 return;
1656         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1657                 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1658
1659         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1660                 return;
1661
1662         for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1663                 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1664                               i * WLAN_SA_QUERY_TR_ID_LEN,
1665                               data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1666                         break;
1667         }
1668
1669         if (i >= wpa_s->sme.sa_query_count) {
1670                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1671                         "transaction identifier found");
1672                 return;
1673         }
1674
1675         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1676                 "from " MACSTR, MAC2STR(sa));
1677         sme_stop_sa_query(wpa_s);
1678 }
1679
1680 #endif /* CONFIG_IEEE80211W */