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