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 static void sme_send_authentication(struct wpa_supplicant *wpa_s,
 141                                     struct wpa_bss *bss, struct wpa_ssid *ssid,
 142                                     int start)
 143 {
 144         struct wpa_driver_auth_params params;
 145         struct wpa_ssid *old_ssid;
 146 #ifdef CONFIG_IEEE80211R
 147         const u8 *ie;
 148 #endif /* CONFIG_IEEE80211R */
 149 #ifdef CONFIG_IEEE80211R
 150         const u8 *md = NULL;
 151 #endif /* CONFIG_IEEE80211R */
 152         int i, bssid_changed;
 153         struct wpabuf *resp = NULL;
 154         u8 ext_capab[18];
 155         int ext_capab_len;
 156
 157         if (bss == NULL) {
 158                 wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for "
 159                         "the network");
 160                 wpas_connect_work_done(wpa_s);
 161                 return;
 162         }
 163
 164         wpa_s->current_bss = bss;
 165
 166         os_memset(&params, 0, sizeof(params));
 167         wpa_s->reassociate = 0;
 168
 169         params.freq = bss->freq;
 170         params.bssid = bss->bssid;
 171         params.ssid = bss->ssid;
 172         params.ssid_len = bss->ssid_len;
 173         params.p2p = ssid->p2p_group;
 174
 175         if (wpa_s->sme.ssid_len != params.ssid_len ||
 176             os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
 177                 wpa_s->sme.prev_bssid_set = 0;
 178
 179         wpa_s->sme.freq = params.freq;
 180         os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
 181         wpa_s->sme.ssid_len = params.ssid_len;
 182
 183         params.auth_alg = WPA_AUTH_ALG_OPEN;
 184 #ifdef IEEE8021X_EAPOL
 185         if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
 186                 if (ssid->leap) {
 187                         if (ssid->non_leap == 0)
 188                                 params.auth_alg = WPA_AUTH_ALG_LEAP;
 189                         else
 190                                 params.auth_alg |= WPA_AUTH_ALG_LEAP;
 191                 }
 192         }
 193 #endif /* IEEE8021X_EAPOL */
 194         wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
 195                 params.auth_alg);
 196         if (ssid->auth_alg) {
 197                 params.auth_alg = ssid->auth_alg;
 198                 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
 199                         "0x%x", params.auth_alg);
 200         }
 201 #ifdef CONFIG_SAE
 202         if (wpa_key_mgmt_sae(ssid->key_mgmt)) {
 203                 const u8 *rsn;
 204                 struct wpa_ie_data ied;
 205
 206                 rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 207                 if (rsn &&
 208                     wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0) {
 209                         if (wpa_key_mgmt_sae(ied.key_mgmt)) {
 210                                 wpa_dbg(wpa_s, MSG_DEBUG, "Using SAE auth_alg");
 211                                 params.auth_alg = WPA_AUTH_ALG_SAE;
 212                         }
 213                 }
 214         }
 215 #endif /* CONFIG_SAE */
 216
 217         for (i = 0; i < NUM_WEP_KEYS; i++) {
 218                 if (ssid->wep_key_len[i])
 219                         params.wep_key[i] = ssid->wep_key[i];
 220                 params.wep_key_len[i] = ssid->wep_key_len[i];
 221         }
 222         params.wep_tx_keyidx = ssid->wep_tx_keyidx;
 223
 224         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 225         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 226         os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
 227         if (bssid_changed)
 228                 wpas_notify_bssid_changed(wpa_s);
 229
 230         if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
 231              wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
 232             wpa_key_mgmt_wpa(ssid->key_mgmt)) {
 233                 int try_opportunistic;
 234                 try_opportunistic = (ssid->proactive_key_caching < 0 ?
 235                                      wpa_s->conf->okc :
 236                                      ssid->proactive_key_caching) &&
 237                         (ssid->proto & WPA_PROTO_RSN);
 238                 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
 239                                             wpa_s->current_ssid,
 240                                             try_opportunistic) == 0)
 241                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
 242                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 243                 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
 244                                               wpa_s->sme.assoc_req_ie,
 245                                               &wpa_s->sme.assoc_req_ie_len)) {
 246                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 247                                 "key management and encryption suites");
 248                         wpas_connect_work_done(wpa_s);
 249                         return;
 250                 }
 251         } else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
 252                    wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) {
 253                 /*
 254                  * Both WPA and non-WPA IEEE 802.1X enabled in configuration -
 255                  * use non-WPA since the scan results did not indicate that the
 256                  * AP is using WPA or WPA2.
 257                  */
 258                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 259                 wpa_s->sme.assoc_req_ie_len = 0;
 260         } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
 261                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 262                 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
 263                                               wpa_s->sme.assoc_req_ie,
 264                                               &wpa_s->sme.assoc_req_ie_len)) {
 265                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 266                                 "key management and encryption suites (no "
 267                                 "scan results)");
 268                         wpas_connect_work_done(wpa_s);
 269                         return;
 270                 }
 271 #ifdef CONFIG_WPS
 272         } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 273                 struct wpabuf *wps_ie;
 274                 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
 275                 if (wps_ie && wpabuf_len(wps_ie) <=
 276                     sizeof(wpa_s->sme.assoc_req_ie)) {
 277                         wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
 278                         os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
 279                                   wpa_s->sme.assoc_req_ie_len);
 280                 } else
 281                         wpa_s->sme.assoc_req_ie_len = 0;
 282                 wpabuf_free(wps_ie);
 283                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 284 #endif /* CONFIG_WPS */
 285         } else {
 286                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 287                 wpa_s->sme.assoc_req_ie_len = 0;
 288         }
 289
 290 #ifdef CONFIG_IEEE80211R
 291         ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
 292         if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
 293                 md = ie + 2;
 294         wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
 295         if (md) {
 296                 /* Prepare for the next transition */
 297                 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
 298         }
 299
 300         if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) {
 301                 if (wpa_s->sme.assoc_req_ie_len + 5 <
 302                     sizeof(wpa_s->sme.assoc_req_ie)) {
 303                         struct rsn_mdie *mdie;
 304                         u8 *pos = wpa_s->sme.assoc_req_ie +
 305                                 wpa_s->sme.assoc_req_ie_len;
 306                         *pos++ = WLAN_EID_MOBILITY_DOMAIN;
 307                         *pos++ = sizeof(*mdie);
 308                         mdie = (struct rsn_mdie *) pos;
 309                         os_memcpy(mdie->mobility_domain, md,
 310                                   MOBILITY_DOMAIN_ID_LEN);
 311                         mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
 312                         wpa_s->sme.assoc_req_ie_len += 5;
 313                 }
 314
 315                 if (wpa_s->sme.ft_used &&
 316                     os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
 317                     wpa_sm_has_ptk(wpa_s->wpa)) {
 318                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT "
 319                                 "over-the-air");
 320                         params.auth_alg = WPA_AUTH_ALG_FT;
 321                         params.ie = wpa_s->sme.ft_ies;
 322                         params.ie_len = wpa_s->sme.ft_ies_len;
 323                 }
 324         }
 325 #endif /* CONFIG_IEEE80211R */
 326
 327 #ifdef CONFIG_IEEE80211W
 328         wpa_s->sme.mfp = ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
 329                 wpa_s->conf->pmf : ssid->ieee80211w;
 330         if (wpa_s->sme.mfp != NO_MGMT_FRAME_PROTECTION) {
 331                 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 332                 struct wpa_ie_data _ie;
 333                 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
 334                     _ie.capabilities &
 335                     (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
 336                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
 337                                 "MFP: require MFP");
 338                         wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
 339                 }
 340         }
 341 #endif /* CONFIG_IEEE80211W */
 342
 343 #ifdef CONFIG_P2P
 344         if (wpa_s->global->p2p) {
 345                 u8 *pos;
 346                 size_t len;
 347                 int res;
 348                 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
 349                 len = sizeof(wpa_s->sme.assoc_req_ie) -
 350                         wpa_s->sme.assoc_req_ie_len;
 351                 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
 352                                             ssid->p2p_group);
 353                 if (res >= 0)
 354                         wpa_s->sme.assoc_req_ie_len += res;
 355         }
 356 #endif /* CONFIG_P2P */
 357
 358 #ifdef CONFIG_HS20
 359         if (is_hs20_network(wpa_s, ssid, bss)) {
 360                 struct wpabuf *hs20;
 361                 hs20 = wpabuf_alloc(20);
 362                 if (hs20) {
 363                         int pps_mo_id = hs20_get_pps_mo_id(wpa_s, ssid);
 364                         wpas_hs20_add_indication(hs20, pps_mo_id);
 365                         os_memcpy(wpa_s->sme.assoc_req_ie +
 366                                   wpa_s->sme.assoc_req_ie_len,
 367                                   wpabuf_head(hs20), wpabuf_len(hs20));
 368                         wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
 369                         wpabuf_free(hs20);
 370                 }
 371         }
 372 #endif /* CONFIG_HS20 */
 373
 374         ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab,
 375                                              sizeof(ext_capab));
 376         if (ext_capab_len > 0) {
 377                 u8 *pos = wpa_s->sme.assoc_req_ie;
 378                 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
 379                         pos += 2 + pos[1];
 380                 os_memmove(pos + ext_capab_len, pos,
 381                            wpa_s->sme.assoc_req_ie_len -
 382                            (pos - wpa_s->sme.assoc_req_ie));
 383                 wpa_s->sme.assoc_req_ie_len += ext_capab_len;
 384                 os_memcpy(pos, ext_capab, ext_capab_len);
 385         }
 386
 387 #ifdef CONFIG_SAE
 388         if (params.auth_alg == WPA_AUTH_ALG_SAE) {
 389                 if (start)
 390                         resp = sme_auth_build_sae_commit(wpa_s, ssid,
 391                                                          bss->bssid);
 392                 else
 393                         resp = sme_auth_build_sae_confirm(wpa_s);
 394                 if (resp == NULL) {
 395                         wpas_connect_work_done(wpa_s);
 396                         return;
 397                 }
 398                 params.sae_data = wpabuf_head(resp);
 399                 params.sae_data_len = wpabuf_len(resp);
 400                 wpa_s->sme.sae.state = start ? SAE_COMMITTED : SAE_CONFIRMED;
 401         }
 402 #endif /* CONFIG_SAE */
 403
 404         wpa_supplicant_cancel_sched_scan(wpa_s);
 405         wpa_supplicant_cancel_scan(wpa_s);
 406
 407         wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
 408                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 409                 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
 410
 411         wpa_clear_keys(wpa_s, bss->bssid);
 412         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 413         old_ssid = wpa_s->current_ssid;
 414         wpa_s->current_ssid = ssid;
 415         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
 416         wpa_supplicant_initiate_eapol(wpa_s);
 417         if (old_ssid != wpa_s->current_ssid)
 418                 wpas_notify_network_changed(wpa_s);
 419
 420 #ifdef CONFIG_P2P
 421         /*
 422          * If multi-channel concurrency is not supported, check for any
 423          * frequency conflict. In case of any frequency conflict, remove the
 424          * least prioritized connection.
 425          */
 426         if (wpa_s->num_multichan_concurrent < 2) {
 427                 int freq, num;
 428                 num = get_shared_radio_freqs(wpa_s, &freq, 1);
 429                 if (num > 0 && freq > 0 && freq != params.freq) {
 430                         wpa_printf(MSG_DEBUG,
 431                                    "Conflicting frequency found (%d != %d)",
 432                                    freq, params.freq);
 433                         if (wpas_p2p_handle_frequency_conflicts(wpa_s,
 434                                                                 params.freq,
 435                                                                 ssid) < 0) {
 436                                 wpas_connection_failed(wpa_s, bss->bssid);
 437                                 wpa_supplicant_mark_disassoc(wpa_s);
 438                                 wpabuf_free(resp);
 439                                 wpas_connect_work_done(wpa_s);
 440                                 return;
 441                         }
 442                 }
 443         }
 444 #endif /* CONFIG_P2P */
 445
 446         wpa_s->sme.auth_alg = params.auth_alg;
 447         if (wpa_drv_authenticate(wpa_s, &params) < 0) {
 448                 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
 449                         "driver failed");
 450                 wpas_connection_failed(wpa_s, bss->bssid);
 451                 wpa_supplicant_mark_disassoc(wpa_s);
 452                 wpabuf_free(resp);
 453                 wpas_connect_work_done(wpa_s);
 454                 return;
 455         }
 456
 457         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 458                                NULL);
 459
 460         /*
 461          * Association will be started based on the authentication event from
 462          * the driver.
 463          */
 464
 465         wpabuf_free(resp);
 466 }
 467
 468
 469 static void sme_auth_start_cb(struct wpa_radio_work *work, int deinit)
 470 {
 471         struct wpa_connect_work *cwork = work->ctx;
 472         struct wpa_supplicant *wpa_s = work->wpa_s;
 473
 474         if (deinit) {
 475                 if (work->started)
 476                         wpa_s->connect_work = NULL;
 477
 478                 wpas_connect_work_free(cwork);
 479                 return;
 480         }
 481
 482         wpa_s->connect_work = work;
 483
 484         if (!wpas_valid_bss_ssid(wpa_s, cwork->bss, cwork->ssid)) {
 485                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: BSS/SSID entry for authentication not valid anymore - drop connection attempt");
 486                 wpas_connect_work_done(wpa_s);
 487                 return;
 488         }
 489
 490         sme_send_authentication(wpa_s, cwork->bss, cwork->ssid, 1);
 491 }
 492
 493
 494 void sme_authenticate(struct wpa_supplicant *wpa_s,
 495                       struct wpa_bss *bss, struct wpa_ssid *ssid)
 496 {
 497         struct wpa_connect_work *cwork;
 498
 499         if (bss == NULL || ssid == NULL)
 500                 return;
 501         if (wpa_s->connect_work) {
 502                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reject sme_authenticate() call since connect_work exist");
 503                 return;
 504         }
 505
 506         if (radio_work_pending(wpa_s, "sme-connect")) {
 507                 /*
 508                  * The previous sme-connect work might no longer be valid due to
 509                  * the fact that the BSS list was updated. In addition, it makes
 510                  * sense to adhere to the 'newer' decision.
 511                  */
 512                 wpa_dbg(wpa_s, MSG_DEBUG,
 513                         "SME: Remove previous pending sme-connect");
 514                 radio_remove_works(wpa_s, "sme-connect", 0);
 515         }
 516
 517         cwork = os_zalloc(sizeof(*cwork));
 518         if (cwork == NULL)
 519                 return;
 520         cwork->bss = bss;
 521         cwork->ssid = ssid;
 522         cwork->sme = 1;
 523
 524 #ifdef CONFIG_SAE
 525         wpa_s->sme.sae.state = SAE_NOTHING;
 526         wpa_s->sme.sae.send_confirm = 0;
 527         wpa_s->sme.sae_group_index = 0;
 528 #endif /* CONFIG_SAE */
 529
 530         if (radio_add_work(wpa_s, bss->freq, "sme-connect", 1,
 531                            sme_auth_start_cb, cwork) < 0)
 532                 wpas_connect_work_free(cwork);
 533 }
 534
 535
 536 #ifdef CONFIG_SAE
 537
 538 static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
 539                         u16 status_code, const u8 *data, size_t len)
 540 {
 541         wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
 542                 "status code %u", auth_transaction, status_code);
 543
 544         if (auth_transaction == 1 &&
 545             status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
 546             wpa_s->sme.sae.state == SAE_COMMITTED &&
 547             wpa_s->current_bss && wpa_s->current_ssid) {
 548                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE anti-clogging token "
 549                         "requested");
 550                 wpabuf_free(wpa_s->sme.sae_token);
 551                 wpa_s->sme.sae_token = wpabuf_alloc_copy(data, len);
 552                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 553                                         wpa_s->current_ssid, 1);
 554                 return 0;
 555         }
 556
 557         if (auth_transaction == 1 &&
 558             status_code == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED &&
 559             wpa_s->sme.sae.state == SAE_COMMITTED &&
 560             wpa_s->current_bss && wpa_s->current_ssid) {
 561                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE group not supported");
 562                 wpa_s->sme.sae_group_index++;
 563                 if (sme_set_sae_group(wpa_s) < 0)
 564                         return -1; /* no other groups enabled */
 565                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Try next enabled SAE group");
 566                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 567                                         wpa_s->current_ssid, 1);
 568                 return 0;
 569         }
 570
 571         if (status_code != WLAN_STATUS_SUCCESS)
 572                 return -1;
 573
 574         if (auth_transaction == 1) {
 575                 int *groups = wpa_s->conf->sae_groups;
 576
 577                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
 578                 if (wpa_s->current_bss == NULL ||
 579                     wpa_s->current_ssid == NULL)
 580                         return -1;
 581                 if (wpa_s->sme.sae.state != SAE_COMMITTED)
 582                         return -1;
 583                 if (groups && groups[0] <= 0)
 584                         groups = NULL;
 585                 if (sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL,
 586                                      groups) != WLAN_STATUS_SUCCESS)
 587                         return -1;
 588
 589                 if (sae_process_commit(&wpa_s->sme.sae) < 0) {
 590                         wpa_printf(MSG_DEBUG, "SAE: Failed to process peer "
 591                                    "commit");
 592                         return -1;
 593                 }
 594
 595                 wpabuf_free(wpa_s->sme.sae_token);
 596                 wpa_s->sme.sae_token = NULL;
 597                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 598                                         wpa_s->current_ssid, 0);
 599                 return 0;
 600         } else if (auth_transaction == 2) {
 601                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
 602                 if (wpa_s->sme.sae.state != SAE_CONFIRMED)
 603                         return -1;
 604                 if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0)
 605                         return -1;
 606                 wpa_s->sme.sae.state = SAE_ACCEPTED;
 607                 sae_clear_temp_data(&wpa_s->sme.sae);
 608                 return 1;
 609         }
 610
 611         return -1;
 612 }
 613 #endif /* CONFIG_SAE */
 614
 615
 616 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
 617 {
 618         struct wpa_ssid *ssid = wpa_s->current_ssid;
 619
 620         if (ssid == NULL) {
 621                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 622                         "when network is not selected");
 623                 return;
 624         }
 625
 626         if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
 627                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 628                         "when not in authenticating state");
 629                 return;
 630         }
 631
 632         if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
 633                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
 634                         "unexpected peer " MACSTR,
 635                         MAC2STR(data->auth.peer));
 636                 return;
 637         }
 638
 639         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
 640                 " auth_type=%d auth_transaction=%d status_code=%d",
 641                 MAC2STR(data->auth.peer), data->auth.auth_type,
 642                 data->auth.auth_transaction, data->auth.status_code);
 643         wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
 644                     data->auth.ies, data->auth.ies_len);
 645
 646         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 647
 648 #ifdef CONFIG_SAE
 649         if (data->auth.auth_type == WLAN_AUTH_SAE) {
 650                 int res;
 651                 res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
 652                                    data->auth.status_code, data->auth.ies,
 653                                    data->auth.ies_len);
 654                 if (res < 0) {
 655                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 656                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 657
 658                 }
 659                 if (res != 1)
 660                         return;
 661
 662                 wpa_printf(MSG_DEBUG, "SME: SAE completed - setting PMK for "
 663                            "4-way handshake");
 664                 wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN);
 665         }
 666 #endif /* CONFIG_SAE */
 667
 668         if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
 669                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
 670                         "code %d)", data->auth.status_code);
 671
 672                 if (data->auth.status_code !=
 673                     WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
 674                     wpa_s->sme.auth_alg == data->auth.auth_type ||
 675                     wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
 676                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 677                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 678                         return;
 679                 }
 680
 681                 wpas_connect_work_done(wpa_s);
 682
 683                 switch (data->auth.auth_type) {
 684                 case WLAN_AUTH_OPEN:
 685                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 686
 687                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
 688                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 689                                                  wpa_s->current_ssid);
 690                         return;
 691
 692                 case WLAN_AUTH_SHARED_KEY:
 693                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
 694
 695                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
 696                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 697                                                  wpa_s->current_ssid);
 698                         return;
 699
 700                 default:
 701                         return;
 702                 }
 703         }
 704
 705 #ifdef CONFIG_IEEE80211R
 706         if (data->auth.auth_type == WLAN_AUTH_FT) {
 707                 union wpa_event_data edata;
 708                 os_memset(&edata, 0, sizeof(edata));
 709                 edata.ft_ies.ies = data->auth.ies;
 710                 edata.ft_ies.ies_len = data->auth.ies_len;
 711                 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
 712                 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
 713         }
 714 #endif /* CONFIG_IEEE80211R */
 715
 716         sme_associate(wpa_s, ssid->mode, data->auth.peer,
 717                       data->auth.auth_type);
 718 }
 719
 720
 721 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
 722                    const u8 *bssid, u16 auth_type)
 723 {
 724         struct wpa_driver_associate_params params;
 725         struct ieee802_11_elems elems;
 726 #ifdef CONFIG_HT_OVERRIDES
 727         struct ieee80211_ht_capabilities htcaps;
 728         struct ieee80211_ht_capabilities htcaps_mask;
 729 #endif /* CONFIG_HT_OVERRIDES */
 730 #ifdef CONFIG_VHT_OVERRIDES
 731         struct ieee80211_vht_capabilities vhtcaps;
 732         struct ieee80211_vht_capabilities vhtcaps_mask;
 733 #endif /* CONFIG_VHT_OVERRIDES */
 734
 735         os_memset(&params, 0, sizeof(params));
 736         params.bssid = bssid;
 737         params.ssid = wpa_s->sme.ssid;
 738         params.ssid_len = wpa_s->sme.ssid_len;
 739         params.freq = wpa_s->sme.freq;
 740         params.bg_scan_period = wpa_s->current_ssid ?
 741                 wpa_s->current_ssid->bg_scan_period : -1;
 742         params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
 743                 wpa_s->sme.assoc_req_ie : NULL;
 744         params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
 745         params.pairwise_suite = wpa_s->pairwise_cipher;
 746         params.group_suite = wpa_s->group_cipher;
 747         params.key_mgmt_suite = wpa_s->key_mgmt;
 748         params.wpa_proto = wpa_s->wpa_proto;
 749 #ifdef CONFIG_HT_OVERRIDES
 750         os_memset(&htcaps, 0, sizeof(htcaps));
 751         os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
 752         params.htcaps = (u8 *) &htcaps;
 753         params.htcaps_mask = (u8 *) &htcaps_mask;
 754         wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, &params);
 755 #endif /* CONFIG_HT_OVERRIDES */
 756 #ifdef CONFIG_VHT_OVERRIDES
 757         os_memset(&vhtcaps, 0, sizeof(vhtcaps));
 758         os_memset(&vhtcaps_mask, 0, sizeof(vhtcaps_mask));
 759         params.vhtcaps = &vhtcaps;
 760         params.vhtcaps_mask = &vhtcaps_mask;
 761         wpa_supplicant_apply_vht_overrides(wpa_s, wpa_s->current_ssid, &params);
 762 #endif /* CONFIG_VHT_OVERRIDES */
 763 #ifdef CONFIG_IEEE80211R
 764         if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
 765                 params.wpa_ie = wpa_s->sme.ft_ies;
 766                 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
 767         }
 768 #endif /* CONFIG_IEEE80211R */
 769         params.mode = mode;
 770         params.mgmt_frame_protection = wpa_s->sme.mfp;
 771         if (wpa_s->sme.prev_bssid_set)
 772                 params.prev_bssid = wpa_s->sme.prev_bssid;
 773
 774         wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
 775                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 776                 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
 777                 params.freq);
 778
 779         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
 780
 781         if (params.wpa_ie == NULL ||
 782             ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
 783             < 0) {
 784                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
 785                 os_memset(&elems, 0, sizeof(elems));
 786         }
 787         if (elems.rsn_ie) {
 788                 params.wpa_proto = WPA_PROTO_RSN;
 789                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
 790                                         elems.rsn_ie_len + 2);
 791         } else if (elems.wpa_ie) {
 792                 params.wpa_proto = WPA_PROTO_WPA;
 793                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
 794                                         elems.wpa_ie_len + 2);
 795         } else if (elems.osen) {
 796                 params.wpa_proto = WPA_PROTO_OSEN;
 797                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.osen - 2,
 798                                         elems.osen_len + 2);
 799         } else
 800                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 801         if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
 802                 params.p2p = 1;
 803
 804         if (wpa_s->parent->set_sta_uapsd)
 805                 params.uapsd = wpa_s->parent->sta_uapsd;
 806         else
 807                 params.uapsd = -1;
 808
 809         if (wpa_drv_associate(wpa_s, &params) < 0) {
 810                 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
 811                         "driver failed");
 812                 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 813                 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 814                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 815                 return;
 816         }
 817
 818         eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
 819                                NULL);
 820 }
 821
 822
 823 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
 824                       const u8 *ies, size_t ies_len)
 825 {
 826         if (md == NULL || ies == NULL) {
 827                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
 828                 os_free(wpa_s->sme.ft_ies);
 829                 wpa_s->sme.ft_ies = NULL;
 830                 wpa_s->sme.ft_ies_len = 0;
 831                 wpa_s->sme.ft_used = 0;
 832                 return 0;
 833         }
 834
 835         os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
 836         wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
 837         os_free(wpa_s->sme.ft_ies);
 838         wpa_s->sme.ft_ies = os_malloc(ies_len);
 839         if (wpa_s->sme.ft_ies == NULL)
 840                 return -1;
 841         os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
 842         wpa_s->sme.ft_ies_len = ies_len;
 843         return 0;
 844 }
 845
 846
 847 static void sme_deauth(struct wpa_supplicant *wpa_s)
 848 {
 849         int bssid_changed;
 850
 851         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 852
 853         if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
 854                                    WLAN_REASON_DEAUTH_LEAVING) < 0) {
 855                 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
 856                         "failed");
 857         }
 858         wpa_s->sme.prev_bssid_set = 0;
 859
 860         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 861         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 862         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 863         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 864         if (bssid_changed)
 865                 wpas_notify_bssid_changed(wpa_s);
 866 }
 867
 868
 869 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
 870                             union wpa_event_data *data)
 871 {
 872         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
 873                 "status code %d", MAC2STR(wpa_s->pending_bssid),
 874                 data->assoc_reject.status_code);
 875
 876         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 877
 878         /*
 879          * For now, unconditionally terminate the previous authentication. In
 880          * theory, this should not be needed, but mac80211 gets quite confused
 881          * if the authentication is left pending.. Some roaming cases might
 882          * benefit from using the previous authentication, so this could be
 883          * optimized in the future.
 884          */
 885         sme_deauth(wpa_s);
 886 }
 887
 888
 889 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
 890                               union wpa_event_data *data)
 891 {
 892         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
 893         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 894         wpa_supplicant_mark_disassoc(wpa_s);
 895 }
 896
 897
 898 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
 899                                union wpa_event_data *data)
 900 {
 901         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
 902         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 903         wpa_supplicant_mark_disassoc(wpa_s);
 904 }
 905
 906
 907 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
 908                         struct disassoc_info *info)
 909 {
 910         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
 911         if (wpa_s->sme.prev_bssid_set) {
 912                 /*
 913                  * cfg80211/mac80211 can get into somewhat confused state if
 914                  * the AP only disassociates us and leaves us in authenticated
 915                  * state. For now, force the state to be cleared to avoid
 916                  * confusing errors if we try to associate with the AP again.
 917                  */
 918                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
 919                         "driver state");
 920                 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
 921                                        WLAN_REASON_DEAUTH_LEAVING);
 922         }
 923 }
 924
 925
 926 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
 927 {
 928         struct wpa_supplicant *wpa_s = eloop_ctx;
 929         if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
 930                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
 931                 sme_deauth(wpa_s);
 932         }
 933 }
 934
 935
 936 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
 937 {
 938         struct wpa_supplicant *wpa_s = eloop_ctx;
 939         if (wpa_s->wpa_state == WPA_ASSOCIATING) {
 940                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
 941                 sme_deauth(wpa_s);
 942         }
 943 }
 944
 945
 946 void sme_state_changed(struct wpa_supplicant *wpa_s)
 947 {
 948         /* Make sure timers are cleaned up appropriately. */
 949         if (wpa_s->wpa_state != WPA_ASSOCIATING)
 950                 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 951         if (wpa_s->wpa_state != WPA_AUTHENTICATING)
 952                 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 953 }
 954
 955
 956 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
 957                                        const u8 *prev_pending_bssid)
 958 {
 959         /*
 960          * mac80211-workaround to force deauth on failed auth cmd,
 961          * requires us to remain in authenticating state to allow the
 962          * second authentication attempt to be continued properly.
 963          */
 964         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
 965                 "to proceed after disconnection event");
 966         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 967         os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
 968
 969         /*
 970          * Re-arm authentication timer in case auth fails for whatever reason.
 971          */
 972         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 973         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 974                                NULL);
 975 }
 976
 977
 978 void sme_deinit(struct wpa_supplicant *wpa_s)
 979 {
 980         os_free(wpa_s->sme.ft_ies);
 981         wpa_s->sme.ft_ies = NULL;
 982         wpa_s->sme.ft_ies_len = 0;
 983 #ifdef CONFIG_IEEE80211W
 984         sme_stop_sa_query(wpa_s);
 985 #endif /* CONFIG_IEEE80211W */
 986 #ifdef CONFIG_SAE
 987         wpabuf_free(wpa_s->sme.sae_token);
 988         wpa_s->sme.sae_token = NULL;
 989         sae_clear_data(&wpa_s->sme.sae);
 990 #endif /* CONFIG_SAE */
 991
 992         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 993         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 994         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
 995 }
 996
 997
 998 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
 999                                    const u8 *chan_list, u8 num_channels,
1000                                    u8 num_intol)
1001 {
1002         struct ieee80211_2040_bss_coex_ie *bc_ie;
1003         struct ieee80211_2040_intol_chan_report *ic_report;
1004         struct wpabuf *buf;
1005
1006         wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR
1007                    " (num_channels=%u num_intol=%u)",
1008                    MAC2STR(wpa_s->bssid), num_channels, num_intol);
1009         wpa_hexdump(MSG_DEBUG, "SME: 20/40 BSS Intolerant Channels",
1010                     chan_list, num_channels);
1011
1012         buf = wpabuf_alloc(2 + /* action.category + action_code */
1013                            sizeof(struct ieee80211_2040_bss_coex_ie) +
1014                            sizeof(struct ieee80211_2040_intol_chan_report) +
1015                            num_channels);
1016         if (buf == NULL)
1017                 return;
1018
1019         wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
1020         wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
1021
1022         bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
1023         bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
1024         bc_ie->length = 1;
1025         if (num_intol)
1026                 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
1027
1028         if (num_channels > 0) {
1029                 ic_report = wpabuf_put(buf, sizeof(*ic_report));
1030                 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
1031                 ic_report->length = num_channels + 1;
1032                 ic_report->op_class = 0;
1033                 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
1034                           num_channels);
1035         }
1036
1037         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1038                                 wpa_s->own_addr, wpa_s->bssid,
1039                                 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
1040                 wpa_msg(wpa_s, MSG_INFO,
1041                         "SME: Failed to send 20/40 BSS Coexistence frame");
1042         }
1043
1044         wpabuf_free(buf);
1045 }
1046
1047
1048 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
1049 {
1050         struct wpa_bss *bss;
1051         const u8 *ie;
1052         u16 ht_cap;
1053         u8 chan_list[P2P_MAX_CHANNELS], channel;
1054         u8 num_channels = 0, num_intol = 0, i;
1055
1056         if (!wpa_s->sme.sched_obss_scan)
1057                 return 0;
1058
1059         wpa_s->sme.sched_obss_scan = 0;
1060         if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
1061                 return 1;
1062
1063         /*
1064          * Check whether AP uses regulatory triplet or channel triplet in
1065          * country info. Right now the operating class of the BSS channel
1066          * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
1067          * based on the assumption that operating class triplet is not used in
1068          * beacon frame. If the First Channel Number/Operating Extension
1069          * Identifier octet has a positive integer value of 201 or greater,
1070          * then its operating class triplet.
1071          *
1072          * TODO: If Supported Operating Classes element is present in beacon
1073          * frame, have to lookup operating class in Annex E and fill them in
1074          * 2040 coex frame.
1075          */
1076         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
1077         if (ie && (ie[1] >= 6) && (ie[5] >= 201))
1078                 return 1;
1079
1080         os_memset(chan_list, 0, sizeof(chan_list));
1081
1082         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1083                 /* Skip other band bss */
1084                 enum hostapd_hw_mode mode;
1085                 mode = ieee80211_freq_to_chan(bss->freq, &channel);
1086                 if (mode != HOSTAPD_MODE_IEEE80211G &&
1087                     mode != HOSTAPD_MODE_IEEE80211B)
1088                         continue;
1089
1090                 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
1091                 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
1092                 wpa_printf(MSG_DEBUG, "SME OBSS scan BSS " MACSTR
1093                            " freq=%u chan=%u ht_cap=0x%x",
1094                            MAC2STR(bss->bssid), bss->freq, channel, ht_cap);
1095
1096                 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
1097                         if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
1098                                 num_intol++;
1099
1100                         /* Check whether the channel is already considered */
1101                         for (i = 0; i < num_channels; i++) {
1102                                 if (channel == chan_list[i])
1103                                         break;
1104                         }
1105                         if (i != num_channels)
1106                                 continue;
1107
1108                         chan_list[num_channels++] = channel;
1109                 }
1110         }
1111
1112         sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
1113         return 1;
1114 }
1115
1116
1117 static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
1118                                           u16 num_modes,
1119                                           enum hostapd_hw_mode mode)
1120 {
1121         u16 i;
1122
1123         for (i = 0; i < num_modes; i++) {
1124                 if (modes[i].mode == mode)
1125                         return &modes[i];
1126         }
1127
1128         return NULL;
1129 }
1130
1131
1132 static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s,
1133                                         enum hostapd_hw_mode band,
1134                                         struct wpa_driver_scan_params *params)
1135 {
1136         /* Include only supported channels for the specified band */
1137         struct hostapd_hw_modes *mode;
1138         int count, i;
1139
1140         mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band);
1141         if (mode == NULL) {
1142                 /* No channels supported in this band - use empty list */
1143                 params->freqs = os_zalloc(sizeof(int));
1144                 return;
1145         }
1146
1147         params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
1148         if (params->freqs == NULL)
1149                 return;
1150         for (count = 0, i = 0; i < mode->num_channels; i++) {
1151                 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
1152                         continue;
1153                 params->freqs[count++] = mode->channels[i].freq;
1154         }
1155 }
1156
1157
1158 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1159 {
1160         struct wpa_supplicant *wpa_s = eloop_ctx;
1161         struct wpa_driver_scan_params params;
1162
1163         if (!wpa_s->current_bss) {
1164                 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
1165                 return;
1166         }
1167
1168         os_memset(&params, 0, sizeof(params));
1169         wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G, &params);
1170         wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
1171
1172         if (wpa_supplicant_trigger_scan(wpa_s, &params))
1173                 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
1174         else
1175                 wpa_s->sme.sched_obss_scan = 1;
1176         os_free(params.freqs);
1177
1178         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1179                                sme_obss_scan_timeout, wpa_s, NULL);
1180 }
1181
1182
1183 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
1184 {
1185         const u8 *ie;
1186         struct wpa_bss *bss = wpa_s->current_bss;
1187         struct wpa_ssid *ssid = wpa_s->current_ssid;
1188         struct hostapd_hw_modes *hw_mode = NULL;
1189         int i;
1190
1191         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1192         wpa_s->sme.sched_obss_scan = 0;
1193         if (!enable)
1194                 return;
1195
1196         /*
1197          * Schedule OBSS scan if driver is using station SME in wpa_supplicant
1198          * or it expects OBSS scan to be performed by wpa_supplicant.
1199          */
1200         if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
1201               (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
1202             ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
1203                 return;
1204
1205         if (!wpa_s->hw.modes)
1206                 return;
1207
1208         /* only HT caps in 11g mode are relevant */
1209         for (i = 0; i < wpa_s->hw.num_modes; i++) {
1210                 hw_mode = &wpa_s->hw.modes[i];
1211                 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
1212                         break;
1213         }
1214
1215         /* Driver does not support HT40 for 11g or doesn't have 11g. */
1216         if (i == wpa_s->hw.num_modes || !hw_mode ||
1217             !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1218                 return;
1219
1220         if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
1221                 return; /* Not associated on 2.4 GHz band */
1222
1223         /* Check whether AP supports HT40 */
1224         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
1225         if (!ie || ie[1] < 2 ||
1226             !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1227                 return; /* AP does not support HT40 */
1228
1229         ie = wpa_bss_get_ie(wpa_s->current_bss,
1230                             WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
1231         if (!ie || ie[1] < 14)
1232                 return; /* AP does not request OBSS scans */
1233
1234         wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
1235         if (wpa_s->sme.obss_scan_int < 10) {
1236                 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
1237                            "replaced with the minimum 10 sec",
1238                            wpa_s->sme.obss_scan_int);
1239                 wpa_s->sme.obss_scan_int = 10;
1240         }
1241         wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
1242                    wpa_s->sme.obss_scan_int);
1243         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1244                                sme_obss_scan_timeout, wpa_s, NULL);
1245 }
1246
1247
1248 #ifdef CONFIG_IEEE80211W
1249
1250 static const unsigned int sa_query_max_timeout = 1000;
1251 static const unsigned int sa_query_retry_timeout = 201;
1252
1253 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
1254 {
1255         u32 tu;
1256         struct os_reltime now, passed;
1257         os_get_reltime(&now);
1258         os_reltime_sub(&now, &wpa_s->sme.sa_query_start, &passed);
1259         tu = (passed.sec * 1000000 + passed.usec) / 1024;
1260         if (sa_query_max_timeout < tu) {
1261                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
1262                 sme_stop_sa_query(wpa_s);
1263                 wpa_supplicant_deauthenticate(
1264                         wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
1265                 return 1;
1266         }
1267
1268         return 0;
1269 }
1270
1271
1272 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
1273                                   const u8 *trans_id)
1274 {
1275         u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
1276         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
1277                 MACSTR, MAC2STR(wpa_s->bssid));
1278         wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
1279                     trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1280         req[0] = WLAN_ACTION_SA_QUERY;
1281         req[1] = WLAN_SA_QUERY_REQUEST;
1282         os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1283         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1284                                 wpa_s->own_addr, wpa_s->bssid,
1285                                 req, sizeof(req), 0) < 0)
1286                 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
1287                         "Request");
1288 }
1289
1290
1291 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
1292 {
1293         struct wpa_supplicant *wpa_s = eloop_ctx;
1294         unsigned int timeout, sec, usec;
1295         u8 *trans_id, *nbuf;
1296
1297         if (wpa_s->sme.sa_query_count > 0 &&
1298             sme_check_sa_query_timeout(wpa_s))
1299                 return;
1300
1301         nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
1302                                 wpa_s->sme.sa_query_count + 1,
1303                                 WLAN_SA_QUERY_TR_ID_LEN);
1304         if (nbuf == NULL)
1305                 return;
1306         if (wpa_s->sme.sa_query_count == 0) {
1307                 /* Starting a new SA Query procedure */
1308                 os_get_reltime(&wpa_s->sme.sa_query_start);
1309         }
1310         trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
1311         wpa_s->sme.sa_query_trans_id = nbuf;
1312         wpa_s->sme.sa_query_count++;
1313
1314         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1315
1316         timeout = sa_query_retry_timeout;
1317         sec = ((timeout / 1000) * 1024) / 1000;
1318         usec = (timeout % 1000) * 1024;
1319         eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
1320
1321         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
1322                 wpa_s->sme.sa_query_count);
1323
1324         sme_send_sa_query_req(wpa_s, trans_id);
1325 }
1326
1327
1328 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
1329 {
1330         sme_sa_query_timer(wpa_s, NULL);
1331 }
1332
1333
1334 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
1335 {
1336         eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
1337         os_free(wpa_s->sme.sa_query_trans_id);
1338         wpa_s->sme.sa_query_trans_id = NULL;
1339         wpa_s->sme.sa_query_count = 0;
1340 }
1341
1342
1343 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1344                                  const u8 *da, u16 reason_code)
1345 {
1346         struct wpa_ssid *ssid;
1347         struct os_reltime now;
1348
1349         if (wpa_s->wpa_state != WPA_COMPLETED)
1350                 return;
1351         ssid = wpa_s->current_ssid;
1352         if (ssid == NULL ||
1353             (ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
1354              wpa_s->conf->pmf : ssid->ieee80211w) == NO_MGMT_FRAME_PROTECTION)
1355                 return;
1356         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1357                 return;
1358         if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1359             reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1360                 return;
1361         if (wpa_s->sme.sa_query_count > 0)
1362                 return;
1363
1364         os_get_reltime(&now);
1365         if (wpa_s->sme.last_unprot_disconnect.sec &&
1366             !os_reltime_expired(&now, &wpa_s->sme.last_unprot_disconnect, 10))
1367                 return; /* limit SA Query procedure frequency */
1368         wpa_s->sme.last_unprot_disconnect = now;
1369
1370         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1371                 "possible AP/STA state mismatch - trigger SA Query");
1372         sme_start_sa_query(wpa_s);
1373 }
1374
1375
1376 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1377                      const u8 *data, size_t len)
1378 {
1379         int i;
1380
1381         if (wpa_s->sme.sa_query_trans_id == NULL ||
1382             len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1383             data[0] != WLAN_SA_QUERY_RESPONSE)
1384                 return;
1385         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1386                 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1387
1388         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1389                 return;
1390
1391         for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1392                 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1393                               i * WLAN_SA_QUERY_TR_ID_LEN,
1394                               data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1395                         break;
1396         }
1397
1398         if (i >= wpa_s->sme.sa_query_count) {
1399                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1400                         "transaction identifier found");
1401                 return;
1402         }
1403
1404         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1405                 "from " MACSTR, MAC2STR(sa));
1406         sme_stop_sa_query(wpa_s);
1407 }
1408
1409 #endif /* CONFIG_IEEE80211W */