wpa_supplicant/sme.c

   1 /*
   2  * wpa_supplicant - SME
   3  * Copyright (c) 2009-2012, 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[10];
 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                 return;
 161         }
 162
 163         wpa_s->current_bss = bss;
 164
 165         os_memset(&params, 0, sizeof(params));
 166         wpa_s->reassociate = 0;
 167
 168         params.freq = bss->freq;
 169         params.bssid = bss->bssid;
 170         params.ssid = bss->ssid;
 171         params.ssid_len = bss->ssid_len;
 172         params.p2p = ssid->p2p_group;
 173
 174         if (wpa_s->sme.ssid_len != params.ssid_len ||
 175             os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
 176                 wpa_s->sme.prev_bssid_set = 0;
 177
 178         wpa_s->sme.freq = params.freq;
 179         os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
 180         wpa_s->sme.ssid_len = params.ssid_len;
 181
 182         params.auth_alg = WPA_AUTH_ALG_OPEN;
 183 #ifdef IEEE8021X_EAPOL
 184         if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
 185                 if (ssid->leap) {
 186                         if (ssid->non_leap == 0)
 187                                 params.auth_alg = WPA_AUTH_ALG_LEAP;
 188                         else
 189                                 params.auth_alg |= WPA_AUTH_ALG_LEAP;
 190                 }
 191         }
 192 #endif /* IEEE8021X_EAPOL */
 193         wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
 194                 params.auth_alg);
 195         if (ssid->auth_alg) {
 196                 params.auth_alg = ssid->auth_alg;
 197                 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
 198                         "0x%x", params.auth_alg);
 199         }
 200 #ifdef CONFIG_SAE
 201         if (wpa_key_mgmt_sae(ssid->key_mgmt)) {
 202                 const u8 *rsn;
 203                 struct wpa_ie_data ied;
 204
 205                 rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 206                 if (rsn &&
 207                     wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0) {
 208                         if (wpa_key_mgmt_sae(ied.key_mgmt)) {
 209                                 wpa_dbg(wpa_s, MSG_DEBUG, "Using SAE auth_alg");
 210                                 params.auth_alg = WPA_AUTH_ALG_SAE;
 211                         }
 212                 }
 213         }
 214 #endif /* CONFIG_SAE */
 215
 216         for (i = 0; i < NUM_WEP_KEYS; i++) {
 217                 if (ssid->wep_key_len[i])
 218                         params.wep_key[i] = ssid->wep_key[i];
 219                 params.wep_key_len[i] = ssid->wep_key_len[i];
 220         }
 221         params.wep_tx_keyidx = ssid->wep_tx_keyidx;
 222
 223         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 224         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 225         os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
 226         if (bssid_changed)
 227                 wpas_notify_bssid_changed(wpa_s);
 228
 229         if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
 230              wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
 231             wpa_key_mgmt_wpa(ssid->key_mgmt)) {
 232                 int try_opportunistic;
 233                 try_opportunistic = (ssid->proactive_key_caching < 0 ?
 234                                      wpa_s->conf->okc :
 235                                      ssid->proactive_key_caching) &&
 236                         (ssid->proto & WPA_PROTO_RSN);
 237                 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
 238                                             wpa_s->current_ssid,
 239                                             try_opportunistic) == 0)
 240                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
 241                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 242                 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
 243                                               wpa_s->sme.assoc_req_ie,
 244                                               &wpa_s->sme.assoc_req_ie_len)) {
 245                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 246                                 "key management and encryption suites");
 247                         return;
 248                 }
 249         } else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
 250                    wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) {
 251                 /*
 252                  * Both WPA and non-WPA IEEE 802.1X enabled in configuration -
 253                  * use non-WPA since the scan results did not indicate that the
 254                  * AP is using WPA or WPA2.
 255                  */
 256                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 257                 wpa_s->sme.assoc_req_ie_len = 0;
 258         } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
 259                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 260                 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
 261                                               wpa_s->sme.assoc_req_ie,
 262                                               &wpa_s->sme.assoc_req_ie_len)) {
 263                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 264                                 "key management and encryption suites (no "
 265                                 "scan results)");
 266                         return;
 267                 }
 268 #ifdef CONFIG_WPS
 269         } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 270                 struct wpabuf *wps_ie;
 271                 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
 272                 if (wps_ie && wpabuf_len(wps_ie) <=
 273                     sizeof(wpa_s->sme.assoc_req_ie)) {
 274                         wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
 275                         os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
 276                                   wpa_s->sme.assoc_req_ie_len);
 277                 } else
 278                         wpa_s->sme.assoc_req_ie_len = 0;
 279                 wpabuf_free(wps_ie);
 280                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 281 #endif /* CONFIG_WPS */
 282         } else {
 283                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 284                 wpa_s->sme.assoc_req_ie_len = 0;
 285         }
 286
 287 #ifdef CONFIG_IEEE80211R
 288         ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
 289         if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
 290                 md = ie + 2;
 291         wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
 292         if (md) {
 293                 /* Prepare for the next transition */
 294                 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
 295         }
 296
 297         if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) {
 298                 if (wpa_s->sme.assoc_req_ie_len + 5 <
 299                     sizeof(wpa_s->sme.assoc_req_ie)) {
 300                         struct rsn_mdie *mdie;
 301                         u8 *pos = wpa_s->sme.assoc_req_ie +
 302                                 wpa_s->sme.assoc_req_ie_len;
 303                         *pos++ = WLAN_EID_MOBILITY_DOMAIN;
 304                         *pos++ = sizeof(*mdie);
 305                         mdie = (struct rsn_mdie *) pos;
 306                         os_memcpy(mdie->mobility_domain, md,
 307                                   MOBILITY_DOMAIN_ID_LEN);
 308                         mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
 309                         wpa_s->sme.assoc_req_ie_len += 5;
 310                 }
 311
 312                 if (wpa_s->sme.ft_used &&
 313                     os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
 314                     wpa_sm_has_ptk(wpa_s->wpa)) {
 315                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT "
 316                                 "over-the-air");
 317                         params.auth_alg = WPA_AUTH_ALG_FT;
 318                         params.ie = wpa_s->sme.ft_ies;
 319                         params.ie_len = wpa_s->sme.ft_ies_len;
 320                 }
 321         }
 322 #endif /* CONFIG_IEEE80211R */
 323
 324 #ifdef CONFIG_IEEE80211W
 325         wpa_s->sme.mfp = ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
 326                 wpa_s->conf->pmf : ssid->ieee80211w;
 327         if (wpa_s->sme.mfp != NO_MGMT_FRAME_PROTECTION) {
 328                 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 329                 struct wpa_ie_data _ie;
 330                 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
 331                     _ie.capabilities &
 332                     (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
 333                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
 334                                 "MFP: require MFP");
 335                         wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
 336                 }
 337         }
 338 #endif /* CONFIG_IEEE80211W */
 339
 340 #ifdef CONFIG_P2P
 341         if (wpa_s->global->p2p) {
 342                 u8 *pos;
 343                 size_t len;
 344                 int res;
 345                 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
 346                 len = sizeof(wpa_s->sme.assoc_req_ie) -
 347                         wpa_s->sme.assoc_req_ie_len;
 348                 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
 349                                             ssid->p2p_group);
 350                 if (res >= 0)
 351                         wpa_s->sme.assoc_req_ie_len += res;
 352         }
 353 #endif /* CONFIG_P2P */
 354
 355 #ifdef CONFIG_HS20
 356         if (is_hs20_network(wpa_s, ssid, bss)) {
 357                 struct wpabuf *hs20;
 358                 hs20 = wpabuf_alloc(20);
 359                 if (hs20) {
 360                         wpas_hs20_add_indication(hs20);
 361                         os_memcpy(wpa_s->sme.assoc_req_ie +
 362                                   wpa_s->sme.assoc_req_ie_len,
 363                                   wpabuf_head(hs20), wpabuf_len(hs20));
 364                         wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
 365                         wpabuf_free(hs20);
 366                 }
 367         }
 368 #endif /* CONFIG_HS20 */
 369
 370         ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab);
 371         if (ext_capab_len > 0) {
 372                 u8 *pos = wpa_s->sme.assoc_req_ie;
 373                 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
 374                         pos += 2 + pos[1];
 375                 os_memmove(pos + ext_capab_len, pos,
 376                            wpa_s->sme.assoc_req_ie_len -
 377                            (pos - wpa_s->sme.assoc_req_ie));
 378                 wpa_s->sme.assoc_req_ie_len += ext_capab_len;
 379                 os_memcpy(pos, ext_capab, ext_capab_len);
 380         }
 381
 382 #ifdef CONFIG_SAE
 383         if (params.auth_alg == WPA_AUTH_ALG_SAE) {
 384                 if (start)
 385                         resp = sme_auth_build_sae_commit(wpa_s, ssid,
 386                                                          bss->bssid);
 387                 else
 388                         resp = sme_auth_build_sae_confirm(wpa_s);
 389                 if (resp == NULL)
 390                         return;
 391                 params.sae_data = wpabuf_head(resp);
 392                 params.sae_data_len = wpabuf_len(resp);
 393                 wpa_s->sme.sae.state = start ? SAE_COMMITTED : SAE_CONFIRMED;
 394         }
 395 #endif /* CONFIG_SAE */
 396
 397         wpa_supplicant_cancel_sched_scan(wpa_s);
 398         wpa_supplicant_cancel_scan(wpa_s);
 399
 400         wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
 401                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 402                 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
 403
 404         wpa_clear_keys(wpa_s, bss->bssid);
 405         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 406         old_ssid = wpa_s->current_ssid;
 407         wpa_s->current_ssid = ssid;
 408         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
 409         wpa_supplicant_initiate_eapol(wpa_s);
 410         if (old_ssid != wpa_s->current_ssid)
 411                 wpas_notify_network_changed(wpa_s);
 412
 413         wpa_s->sme.auth_alg = params.auth_alg;
 414         if (wpa_drv_authenticate(wpa_s, &params) < 0) {
 415                 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
 416                         "driver failed");
 417                 wpas_connection_failed(wpa_s, bss->bssid);
 418                 wpa_supplicant_mark_disassoc(wpa_s);
 419                 wpabuf_free(resp);
 420                 return;
 421         }
 422
 423         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 424                                NULL);
 425
 426         /*
 427          * Association will be started based on the authentication event from
 428          * the driver.
 429          */
 430
 431         wpabuf_free(resp);
 432 }
 433
 434
 435 void sme_authenticate(struct wpa_supplicant *wpa_s,
 436                       struct wpa_bss *bss, struct wpa_ssid *ssid)
 437 {
 438 #ifdef CONFIG_SAE
 439         wpa_s->sme.sae.state = SAE_NOTHING;
 440         wpa_s->sme.sae.send_confirm = 0;
 441         wpa_s->sme.sae_group_index = 0;
 442 #endif /* CONFIG_SAE */
 443         sme_send_authentication(wpa_s, bss, ssid, 1);
 444 }
 445
 446
 447 #ifdef CONFIG_SAE
 448
 449 static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
 450                         u16 status_code, const u8 *data, size_t len)
 451 {
 452         wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
 453                 "status code %u", auth_transaction, status_code);
 454
 455         if (auth_transaction == 1 &&
 456             status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
 457             wpa_s->sme.sae.state == SAE_COMMITTED &&
 458             wpa_s->current_bss && wpa_s->current_ssid) {
 459                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE anti-clogging token "
 460                         "requested");
 461                 wpabuf_free(wpa_s->sme.sae_token);
 462                 wpa_s->sme.sae_token = wpabuf_alloc_copy(data, len);
 463                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 464                                         wpa_s->current_ssid, 1);
 465                 return 0;
 466         }
 467
 468         if (auth_transaction == 1 &&
 469             status_code == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED &&
 470             wpa_s->sme.sae.state == SAE_COMMITTED &&
 471             wpa_s->current_bss && wpa_s->current_ssid) {
 472                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE group not supported");
 473                 wpa_s->sme.sae_group_index++;
 474                 if (sme_set_sae_group(wpa_s) < 0)
 475                         return -1; /* no other groups enabled */
 476                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Try next enabled SAE group");
 477                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 478                                         wpa_s->current_ssid, 1);
 479                 return 0;
 480         }
 481
 482         if (status_code != WLAN_STATUS_SUCCESS)
 483                 return -1;
 484
 485         if (auth_transaction == 1) {
 486                 int *groups = wpa_s->conf->sae_groups;
 487
 488                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
 489                 if (wpa_s->current_bss == NULL ||
 490                     wpa_s->current_ssid == NULL)
 491                         return -1;
 492                 if (wpa_s->sme.sae.state != SAE_COMMITTED)
 493                         return -1;
 494                 if (groups && groups[0] <= 0)
 495                         groups = NULL;
 496                 if (sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL,
 497                                      groups) != WLAN_STATUS_SUCCESS)
 498                         return -1;
 499
 500                 if (sae_process_commit(&wpa_s->sme.sae) < 0) {
 501                         wpa_printf(MSG_DEBUG, "SAE: Failed to process peer "
 502                                    "commit");
 503                         return -1;
 504                 }
 505
 506                 wpabuf_free(wpa_s->sme.sae_token);
 507                 wpa_s->sme.sae_token = NULL;
 508                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 509                                         wpa_s->current_ssid, 0);
 510                 return 0;
 511         } else if (auth_transaction == 2) {
 512                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
 513                 if (wpa_s->sme.sae.state != SAE_CONFIRMED)
 514                         return -1;
 515                 if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0)
 516                         return -1;
 517                 wpa_s->sme.sae.state = SAE_ACCEPTED;
 518                 sae_clear_temp_data(&wpa_s->sme.sae);
 519                 return 1;
 520         }
 521
 522         return -1;
 523 }
 524 #endif /* CONFIG_SAE */
 525
 526
 527 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
 528 {
 529         struct wpa_ssid *ssid = wpa_s->current_ssid;
 530
 531         if (ssid == NULL) {
 532                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 533                         "when network is not selected");
 534                 return;
 535         }
 536
 537         if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
 538                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 539                         "when not in authenticating state");
 540                 return;
 541         }
 542
 543         if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
 544                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
 545                         "unexpected peer " MACSTR,
 546                         MAC2STR(data->auth.peer));
 547                 return;
 548         }
 549
 550         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
 551                 " auth_type=%d auth_transaction=%d status_code=%d",
 552                 MAC2STR(data->auth.peer), data->auth.auth_type,
 553                 data->auth.auth_transaction, data->auth.status_code);
 554         wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
 555                     data->auth.ies, data->auth.ies_len);
 556
 557         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 558
 559 #ifdef CONFIG_SAE
 560         if (data->auth.auth_type == WLAN_AUTH_SAE) {
 561                 int res;
 562                 res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
 563                                    data->auth.status_code, data->auth.ies,
 564                                    data->auth.ies_len);
 565                 if (res < 0) {
 566                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 567                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 568
 569                 }
 570                 if (res != 1)
 571                         return;
 572
 573                 wpa_printf(MSG_DEBUG, "SME: SAE completed - setting PMK for "
 574                            "4-way handshake");
 575                 wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN);
 576         }
 577 #endif /* CONFIG_SAE */
 578
 579         if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
 580                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
 581                         "code %d)", data->auth.status_code);
 582
 583                 if (data->auth.status_code !=
 584                     WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
 585                     wpa_s->sme.auth_alg == data->auth.auth_type ||
 586                     wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
 587                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 588                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 589                         return;
 590                 }
 591
 592                 switch (data->auth.auth_type) {
 593                 case WLAN_AUTH_OPEN:
 594                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 595
 596                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
 597                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 598                                                  wpa_s->current_ssid);
 599                         return;
 600
 601                 case WLAN_AUTH_SHARED_KEY:
 602                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
 603
 604                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
 605                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 606                                                  wpa_s->current_ssid);
 607                         return;
 608
 609                 default:
 610                         return;
 611                 }
 612         }
 613
 614 #ifdef CONFIG_IEEE80211R
 615         if (data->auth.auth_type == WLAN_AUTH_FT) {
 616                 union wpa_event_data edata;
 617                 os_memset(&edata, 0, sizeof(edata));
 618                 edata.ft_ies.ies = data->auth.ies;
 619                 edata.ft_ies.ies_len = data->auth.ies_len;
 620                 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
 621                 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
 622         }
 623 #endif /* CONFIG_IEEE80211R */
 624
 625         sme_associate(wpa_s, ssid->mode, data->auth.peer,
 626                       data->auth.auth_type);
 627 }
 628
 629
 630 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
 631                    const u8 *bssid, u16 auth_type)
 632 {
 633         struct wpa_driver_associate_params params;
 634         struct ieee802_11_elems elems;
 635 #ifdef CONFIG_HT_OVERRIDES
 636         struct ieee80211_ht_capabilities htcaps;
 637         struct ieee80211_ht_capabilities htcaps_mask;
 638 #endif /* CONFIG_HT_OVERRIDES */
 639 #ifdef CONFIG_VHT_OVERRIDES
 640         struct ieee80211_vht_capabilities vhtcaps;
 641         struct ieee80211_vht_capabilities vhtcaps_mask;
 642 #endif /* CONFIG_VHT_OVERRIDES */
 643
 644         os_memset(&params, 0, sizeof(params));
 645         params.bssid = bssid;
 646         params.ssid = wpa_s->sme.ssid;
 647         params.ssid_len = wpa_s->sme.ssid_len;
 648         params.freq = wpa_s->sme.freq;
 649         params.bg_scan_period = wpa_s->current_ssid ?
 650                 wpa_s->current_ssid->bg_scan_period : -1;
 651         params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
 652                 wpa_s->sme.assoc_req_ie : NULL;
 653         params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
 654         params.pairwise_suite =
 655                 wpa_cipher_to_suite_driver(wpa_s->pairwise_cipher);
 656         params.group_suite = wpa_cipher_to_suite_driver(wpa_s->group_cipher);
 657 #ifdef CONFIG_HT_OVERRIDES
 658         os_memset(&htcaps, 0, sizeof(htcaps));
 659         os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
 660         params.htcaps = (u8 *) &htcaps;
 661         params.htcaps_mask = (u8 *) &htcaps_mask;
 662         wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, &params);
 663 #endif /* CONFIG_HT_OVERRIDES */
 664 #ifdef CONFIG_VHT_OVERRIDES
 665         os_memset(&vhtcaps, 0, sizeof(vhtcaps));
 666         os_memset(&vhtcaps_mask, 0, sizeof(vhtcaps_mask));
 667         params.vhtcaps = &vhtcaps;
 668         params.vhtcaps_mask = &vhtcaps_mask;
 669         wpa_supplicant_apply_vht_overrides(wpa_s, wpa_s->current_ssid, &params);
 670 #endif /* CONFIG_VHT_OVERRIDES */
 671 #ifdef CONFIG_IEEE80211R
 672         if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
 673                 params.wpa_ie = wpa_s->sme.ft_ies;
 674                 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
 675         }
 676 #endif /* CONFIG_IEEE80211R */
 677         params.mode = mode;
 678         params.mgmt_frame_protection = wpa_s->sme.mfp;
 679         if (wpa_s->sme.prev_bssid_set)
 680                 params.prev_bssid = wpa_s->sme.prev_bssid;
 681
 682         wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
 683                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 684                 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
 685                 params.freq);
 686
 687         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
 688
 689         if (params.wpa_ie == NULL ||
 690             ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
 691             < 0) {
 692                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
 693                 os_memset(&elems, 0, sizeof(elems));
 694         }
 695         if (elems.rsn_ie) {
 696                 params.wpa_proto = WPA_PROTO_RSN;
 697                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
 698                                         elems.rsn_ie_len + 2);
 699         } else if (elems.wpa_ie) {
 700                 params.wpa_proto = WPA_PROTO_WPA;
 701                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
 702                                         elems.wpa_ie_len + 2);
 703         } else
 704                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 705         if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
 706                 params.p2p = 1;
 707
 708         if (wpa_s->parent->set_sta_uapsd)
 709                 params.uapsd = wpa_s->parent->sta_uapsd;
 710         else
 711                 params.uapsd = -1;
 712
 713         if (wpa_drv_associate(wpa_s, &params) < 0) {
 714                 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
 715                         "driver failed");
 716                 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 717                 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 718                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 719                 return;
 720         }
 721
 722         eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
 723                                NULL);
 724 }
 725
 726
 727 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
 728                       const u8 *ies, size_t ies_len)
 729 {
 730         if (md == NULL || ies == NULL) {
 731                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
 732                 os_free(wpa_s->sme.ft_ies);
 733                 wpa_s->sme.ft_ies = NULL;
 734                 wpa_s->sme.ft_ies_len = 0;
 735                 wpa_s->sme.ft_used = 0;
 736                 return 0;
 737         }
 738
 739         os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
 740         wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
 741         os_free(wpa_s->sme.ft_ies);
 742         wpa_s->sme.ft_ies = os_malloc(ies_len);
 743         if (wpa_s->sme.ft_ies == NULL)
 744                 return -1;
 745         os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
 746         wpa_s->sme.ft_ies_len = ies_len;
 747         return 0;
 748 }
 749
 750
 751 static void sme_deauth(struct wpa_supplicant *wpa_s)
 752 {
 753         int bssid_changed;
 754
 755         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 756
 757         if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
 758                                    WLAN_REASON_DEAUTH_LEAVING) < 0) {
 759                 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
 760                         "failed");
 761         }
 762         wpa_s->sme.prev_bssid_set = 0;
 763
 764         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 765         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 766         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 767         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 768         if (bssid_changed)
 769                 wpas_notify_bssid_changed(wpa_s);
 770 }
 771
 772
 773 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
 774                             union wpa_event_data *data)
 775 {
 776         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
 777                 "status code %d", MAC2STR(wpa_s->pending_bssid),
 778                 data->assoc_reject.status_code);
 779
 780         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 781
 782         /*
 783          * For now, unconditionally terminate the previous authentication. In
 784          * theory, this should not be needed, but mac80211 gets quite confused
 785          * if the authentication is left pending.. Some roaming cases might
 786          * benefit from using the previous authentication, so this could be
 787          * optimized in the future.
 788          */
 789         sme_deauth(wpa_s);
 790 }
 791
 792
 793 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
 794                               union wpa_event_data *data)
 795 {
 796         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
 797         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 798         wpa_supplicant_mark_disassoc(wpa_s);
 799 }
 800
 801
 802 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
 803                                union wpa_event_data *data)
 804 {
 805         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
 806         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 807         wpa_supplicant_mark_disassoc(wpa_s);
 808 }
 809
 810
 811 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
 812                         struct disassoc_info *info)
 813 {
 814         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
 815         if (wpa_s->sme.prev_bssid_set) {
 816                 /*
 817                  * cfg80211/mac80211 can get into somewhat confused state if
 818                  * the AP only disassociates us and leaves us in authenticated
 819                  * state. For now, force the state to be cleared to avoid
 820                  * confusing errors if we try to associate with the AP again.
 821                  */
 822                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
 823                         "driver state");
 824                 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
 825                                        WLAN_REASON_DEAUTH_LEAVING);
 826         }
 827 }
 828
 829
 830 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
 831 {
 832         struct wpa_supplicant *wpa_s = eloop_ctx;
 833         if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
 834                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
 835                 sme_deauth(wpa_s);
 836         }
 837 }
 838
 839
 840 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
 841 {
 842         struct wpa_supplicant *wpa_s = eloop_ctx;
 843         if (wpa_s->wpa_state == WPA_ASSOCIATING) {
 844                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
 845                 sme_deauth(wpa_s);
 846         }
 847 }
 848
 849
 850 void sme_state_changed(struct wpa_supplicant *wpa_s)
 851 {
 852         /* Make sure timers are cleaned up appropriately. */
 853         if (wpa_s->wpa_state != WPA_ASSOCIATING)
 854                 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 855         if (wpa_s->wpa_state != WPA_AUTHENTICATING)
 856                 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 857 }
 858
 859
 860 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
 861                                        const u8 *prev_pending_bssid)
 862 {
 863         /*
 864          * mac80211-workaround to force deauth on failed auth cmd,
 865          * requires us to remain in authenticating state to allow the
 866          * second authentication attempt to be continued properly.
 867          */
 868         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
 869                 "to proceed after disconnection event");
 870         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 871         os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
 872
 873         /*
 874          * Re-arm authentication timer in case auth fails for whatever reason.
 875          */
 876         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 877         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 878                                NULL);
 879 }
 880
 881
 882 void sme_deinit(struct wpa_supplicant *wpa_s)
 883 {
 884         os_free(wpa_s->sme.ft_ies);
 885         wpa_s->sme.ft_ies = NULL;
 886         wpa_s->sme.ft_ies_len = 0;
 887 #ifdef CONFIG_IEEE80211W
 888         sme_stop_sa_query(wpa_s);
 889 #endif /* CONFIG_IEEE80211W */
 890 #ifdef CONFIG_SAE
 891         wpabuf_free(wpa_s->sme.sae_token);
 892         wpa_s->sme.sae_token = NULL;
 893         sae_clear_data(&wpa_s->sme.sae);
 894 #endif /* CONFIG_SAE */
 895
 896         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 897         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 898         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
 899 }
 900
 901
 902 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
 903                                    const u8 *chan_list, u8 num_channels,
 904                                    u8 num_intol)
 905 {
 906         struct ieee80211_2040_bss_coex_ie *bc_ie;
 907         struct ieee80211_2040_intol_chan_report *ic_report;
 908         struct wpabuf *buf;
 909
 910         wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR,
 911                    MAC2STR(wpa_s->bssid));
 912
 913         buf = wpabuf_alloc(2 + /* action.category + action_code */
 914                            sizeof(struct ieee80211_2040_bss_coex_ie) +
 915                            sizeof(struct ieee80211_2040_intol_chan_report) +
 916                            num_channels);
 917         if (buf == NULL)
 918                 return;
 919
 920         wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
 921         wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
 922
 923         bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
 924         bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
 925         bc_ie->length = 1;
 926         if (num_intol)
 927                 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
 928
 929         if (num_channels > 0) {
 930                 ic_report = wpabuf_put(buf, sizeof(*ic_report));
 931                 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
 932                 ic_report->length = num_channels + 1;
 933                 ic_report->op_class = 0;
 934                 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
 935                           num_channels);
 936         }
 937
 938         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
 939                                 wpa_s->own_addr, wpa_s->bssid,
 940                                 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
 941                 wpa_msg(wpa_s, MSG_INFO,
 942                         "SME: Failed to send 20/40 BSS Coexistence frame");
 943         }
 944
 945         wpabuf_free(buf);
 946 }
 947
 948
 949 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
 950 {
 951         struct wpa_bss *bss;
 952         const u8 *ie;
 953         u16 ht_cap;
 954         u8 chan_list[P2P_MAX_CHANNELS], channel;
 955         u8 num_channels = 0, num_intol = 0, i;
 956
 957         if (!wpa_s->sme.sched_obss_scan)
 958                 return 0;
 959
 960         wpa_s->sme.sched_obss_scan = 0;
 961         if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
 962                 return 1;
 963
 964         /*
 965          * Check whether AP uses regulatory triplet or channel triplet in
 966          * country info. Right now the operating class of the BSS channel
 967          * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
 968          * based on the assumption that operating class triplet is not used in
 969          * beacon frame. If the First Channel Number/Operating Extension
 970          * Identifier octet has a positive integer value of 201 or greater,
 971          * then its operating class triplet.
 972          *
 973          * TODO: If Supported Operating Classes element is present in beacon
 974          * frame, have to lookup operating class in Annex E and fill them in
 975          * 2040 coex frame.
 976          */
 977         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
 978         if (ie && (ie[1] >= 6) && (ie[5] >= 201))
 979                 return 1;
 980
 981         os_memset(chan_list, 0, sizeof(chan_list));
 982
 983         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
 984                 /* Skip other band bss */
 985                 enum hostapd_hw_mode mode;
 986                 mode = ieee80211_freq_to_chan(bss->freq, &channel);
 987                 if (mode != HOSTAPD_MODE_IEEE80211G &&
 988                     mode != HOSTAPD_MODE_IEEE80211B)
 989                         continue;
 990
 991                 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
 992                 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
 993
 994                 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
 995                         /* Check whether the channel is already considered */
 996                         for (i = 0; i < num_channels; i++) {
 997                                 if (channel == chan_list[i])
 998                                         break;
 999                         }
1000                         if (i != num_channels)
1001                                 continue;
1002
1003                         if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
1004                                 num_intol++;
1005
1006                         chan_list[num_channels++] = channel;
1007                 }
1008         }
1009
1010         sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
1011         return 1;
1012 }
1013
1014
1015 static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
1016                                           u16 num_modes,
1017                                           enum hostapd_hw_mode mode)
1018 {
1019         u16 i;
1020
1021         for (i = 0; i < num_modes; i++) {
1022                 if (modes[i].mode == mode)
1023                         return &modes[i];
1024         }
1025
1026         return NULL;
1027 }
1028
1029
1030 static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s,
1031                                         enum hostapd_hw_mode band,
1032                                         struct wpa_driver_scan_params *params)
1033 {
1034         /* Include only supported channels for the specified band */
1035         struct hostapd_hw_modes *mode;
1036         int count, i;
1037
1038         mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band);
1039         if (mode == NULL) {
1040                 /* No channels supported in this band - use empty list */
1041                 params->freqs = os_zalloc(sizeof(int));
1042                 return;
1043         }
1044
1045         params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
1046         if (params->freqs == NULL)
1047                 return;
1048         for (count = 0, i = 0; i < mode->num_channels; i++) {
1049                 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
1050                         continue;
1051                 params->freqs[count++] = mode->channels[i].freq;
1052         }
1053 }
1054
1055
1056 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1057 {
1058         struct wpa_supplicant *wpa_s = eloop_ctx;
1059         struct wpa_driver_scan_params params;
1060
1061         if (!wpa_s->current_bss) {
1062                 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
1063                 return;
1064         }
1065
1066         os_memset(&params, 0, sizeof(params));
1067         wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G, &params);
1068         wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
1069
1070         if (wpa_supplicant_trigger_scan(wpa_s, &params))
1071                 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
1072         else
1073                 wpa_s->sme.sched_obss_scan = 1;
1074         os_free(params.freqs);
1075
1076         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1077                                sme_obss_scan_timeout, wpa_s, NULL);
1078 }
1079
1080
1081 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
1082 {
1083         const u8 *ie;
1084         struct wpa_bss *bss = wpa_s->current_bss;
1085         struct wpa_ssid *ssid = wpa_s->current_ssid;
1086         struct hostapd_hw_modes *hw_mode = NULL;
1087         int i;
1088
1089         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1090         wpa_s->sme.sched_obss_scan = 0;
1091         if (!enable)
1092                 return;
1093
1094         /*
1095          * Schedule OBSS scan if driver is using station SME in wpa_supplicant
1096          * or it expects OBSS scan to be performed by wpa_supplicant.
1097          */
1098         if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
1099               (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
1100             ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
1101                 return;
1102
1103         if (!wpa_s->hw.modes)
1104                 return;
1105
1106         /* only HT caps in 11g mode are relevant */
1107         for (i = 0; i < wpa_s->hw.num_modes; i++) {
1108                 hw_mode = &wpa_s->hw.modes[i];
1109                 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
1110                         break;
1111         }
1112
1113         /* Driver does not support HT40 for 11g or doesn't have 11g. */
1114         if (i == wpa_s->hw.num_modes || !hw_mode ||
1115             !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1116                 return;
1117
1118         if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
1119                 return; /* Not associated on 2.4 GHz band */
1120
1121         /* Check whether AP supports HT40 */
1122         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
1123         if (!ie || ie[1] < 2 ||
1124             !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1125                 return; /* AP does not support HT40 */
1126
1127         ie = wpa_bss_get_ie(wpa_s->current_bss,
1128                             WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
1129         if (!ie || ie[1] < 14)
1130                 return; /* AP does not request OBSS scans */
1131
1132         wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
1133         if (wpa_s->sme.obss_scan_int < 10) {
1134                 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
1135                            "replaced with the minimum 10 sec",
1136                            wpa_s->sme.obss_scan_int);
1137                 wpa_s->sme.obss_scan_int = 10;
1138         }
1139         wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
1140                    wpa_s->sme.obss_scan_int);
1141         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1142                                sme_obss_scan_timeout, wpa_s, NULL);
1143 }
1144
1145
1146 #ifdef CONFIG_IEEE80211W
1147
1148 static const unsigned int sa_query_max_timeout = 1000;
1149 static const unsigned int sa_query_retry_timeout = 201;
1150
1151 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
1152 {
1153         u32 tu;
1154         struct os_reltime now, passed;
1155         os_get_reltime(&now);
1156         os_reltime_sub(&now, &wpa_s->sme.sa_query_start, &passed);
1157         tu = (passed.sec * 1000000 + passed.usec) / 1024;
1158         if (sa_query_max_timeout < tu) {
1159                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
1160                 sme_stop_sa_query(wpa_s);
1161                 wpa_supplicant_deauthenticate(
1162                         wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
1163                 return 1;
1164         }
1165
1166         return 0;
1167 }
1168
1169
1170 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
1171                                   const u8 *trans_id)
1172 {
1173         u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
1174         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
1175                 MACSTR, MAC2STR(wpa_s->bssid));
1176         wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
1177                     trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1178         req[0] = WLAN_ACTION_SA_QUERY;
1179         req[1] = WLAN_SA_QUERY_REQUEST;
1180         os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1181         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1182                                 wpa_s->own_addr, wpa_s->bssid,
1183                                 req, sizeof(req), 0) < 0)
1184                 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
1185                         "Request");
1186 }
1187
1188
1189 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
1190 {
1191         struct wpa_supplicant *wpa_s = eloop_ctx;
1192         unsigned int timeout, sec, usec;
1193         u8 *trans_id, *nbuf;
1194
1195         if (wpa_s->sme.sa_query_count > 0 &&
1196             sme_check_sa_query_timeout(wpa_s))
1197                 return;
1198
1199         nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
1200                                 wpa_s->sme.sa_query_count + 1,
1201                                 WLAN_SA_QUERY_TR_ID_LEN);
1202         if (nbuf == NULL)
1203                 return;
1204         if (wpa_s->sme.sa_query_count == 0) {
1205                 /* Starting a new SA Query procedure */
1206                 os_get_reltime(&wpa_s->sme.sa_query_start);
1207         }
1208         trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
1209         wpa_s->sme.sa_query_trans_id = nbuf;
1210         wpa_s->sme.sa_query_count++;
1211
1212         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1213
1214         timeout = sa_query_retry_timeout;
1215         sec = ((timeout / 1000) * 1024) / 1000;
1216         usec = (timeout % 1000) * 1024;
1217         eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
1218
1219         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
1220                 wpa_s->sme.sa_query_count);
1221
1222         sme_send_sa_query_req(wpa_s, trans_id);
1223 }
1224
1225
1226 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
1227 {
1228         sme_sa_query_timer(wpa_s, NULL);
1229 }
1230
1231
1232 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
1233 {
1234         eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
1235         os_free(wpa_s->sme.sa_query_trans_id);
1236         wpa_s->sme.sa_query_trans_id = NULL;
1237         wpa_s->sme.sa_query_count = 0;
1238 }
1239
1240
1241 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1242                                  const u8 *da, u16 reason_code)
1243 {
1244         struct wpa_ssid *ssid;
1245
1246         if (wpa_s->wpa_state != WPA_COMPLETED)
1247                 return;
1248         ssid = wpa_s->current_ssid;
1249         if (ssid == NULL ||
1250             (ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
1251              wpa_s->conf->pmf : ssid->ieee80211w) == NO_MGMT_FRAME_PROTECTION)
1252                 return;
1253         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1254                 return;
1255         if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1256             reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1257                 return;
1258         if (wpa_s->sme.sa_query_count > 0)
1259                 return;
1260
1261         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1262                 "possible AP/STA state mismatch - trigger SA Query");
1263         sme_start_sa_query(wpa_s);
1264 }
1265
1266
1267 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1268                      const u8 *data, size_t len)
1269 {
1270         int i;
1271
1272         if (wpa_s->sme.sa_query_trans_id == NULL ||
1273             len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1274             data[0] != WLAN_SA_QUERY_RESPONSE)
1275                 return;
1276         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1277                 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1278
1279         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1280                 return;
1281
1282         for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1283                 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1284                               i * WLAN_SA_QUERY_TR_ID_LEN,
1285                               data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1286                         break;
1287         }
1288
1289         if (i >= wpa_s->sme.sa_query_count) {
1290                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1291                         "transaction identifier found");
1292                 return;
1293         }
1294
1295         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1296                 "from " MACSTR, MAC2STR(sa));
1297         sme_stop_sa_query(wpa_s);
1298 }
1299
1300 #endif /* CONFIG_IEEE80211W */