wpa_supplicant/sme.c

   1 /*
   2  * wpa_supplicant - SME
   3  * Copyright (c) 2009-2010, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "includes.h"
  16
  17 #include "common.h"
  18 #include "utils/eloop.h"
  19 #include "common/ieee802_11_defs.h"
  20 #include "common/ieee802_11_common.h"
  21 #include "eapol_supp/eapol_supp_sm.h"
  22 #include "common/wpa_common.h"
  23 #include "rsn_supp/wpa.h"
  24 #include "rsn_supp/pmksa_cache.h"
  25 #include "config.h"
  26 #include "wpa_supplicant_i.h"
  27 #include "driver_i.h"
  28 #include "wpas_glue.h"
  29 #include "wps_supplicant.h"
  30 #include "p2p_supplicant.h"
  31 #include "notify.h"
  32 #include "bss.h"
  33 #include "scan.h"
  34 #include "sme.h"
  35
  36 #define SME_AUTH_TIMEOUT 5
  37 #define SME_ASSOC_TIMEOUT 5
  38
  39 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx);
  40 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx);
  41 #ifdef CONFIG_IEEE80211W
  42 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s);
  43 #endif /* CONFIG_IEEE80211W */
  44
  45
  46 void sme_authenticate(struct wpa_supplicant *wpa_s,
  47                       struct wpa_bss *bss, struct wpa_ssid *ssid)
  48 {
  49         struct wpa_driver_auth_params params;
  50         struct wpa_ssid *old_ssid;
  51 #ifdef CONFIG_IEEE80211R
  52         const u8 *ie;
  53 #endif /* CONFIG_IEEE80211R */
  54 #ifdef CONFIG_IEEE80211R
  55         const u8 *md = NULL;
  56 #endif /* CONFIG_IEEE80211R */
  57         int i, bssid_changed;
  58
  59         if (bss == NULL) {
  60                 wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for "
  61                         "the network");
  62                 return;
  63         }
  64
  65         wpa_s->current_bss = bss;
  66
  67         os_memset(&params, 0, sizeof(params));
  68         wpa_s->reassociate = 0;
  69
  70         params.freq = bss->freq;
  71         params.bssid = bss->bssid;
  72         params.ssid = bss->ssid;
  73         params.ssid_len = bss->ssid_len;
  74         params.p2p = ssid->p2p_group;
  75
  76         if (wpa_s->sme.ssid_len != params.ssid_len ||
  77             os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
  78                 wpa_s->sme.prev_bssid_set = 0;
  79
  80         wpa_s->sme.freq = params.freq;
  81         os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
  82         wpa_s->sme.ssid_len = params.ssid_len;
  83
  84         params.auth_alg = WPA_AUTH_ALG_OPEN;
  85 #ifdef IEEE8021X_EAPOL
  86         if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
  87                 if (ssid->leap) {
  88                         if (ssid->non_leap == 0)
  89                                 params.auth_alg = WPA_AUTH_ALG_LEAP;
  90                         else
  91                                 params.auth_alg |= WPA_AUTH_ALG_LEAP;
  92                 }
  93         }
  94 #endif /* IEEE8021X_EAPOL */
  95         wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
  96                 params.auth_alg);
  97         if (ssid->auth_alg) {
  98                 params.auth_alg = ssid->auth_alg;
  99                 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
 100                         "0x%x", params.auth_alg);
 101         }
 102
 103         for (i = 0; i < NUM_WEP_KEYS; i++) {
 104                 if (ssid->wep_key_len[i])
 105                         params.wep_key[i] = ssid->wep_key[i];
 106                 params.wep_key_len[i] = ssid->wep_key_len[i];
 107         }
 108         params.wep_tx_keyidx = ssid->wep_tx_keyidx;
 109
 110         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 111         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 112         os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
 113         if (bssid_changed)
 114                 wpas_notify_bssid_changed(wpa_s);
 115
 116         if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
 117              wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
 118             wpa_key_mgmt_wpa(ssid->key_mgmt)) {
 119                 int try_opportunistic;
 120                 try_opportunistic = ssid->proactive_key_caching &&
 121                         (ssid->proto & WPA_PROTO_RSN);
 122                 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
 123                                             wpa_s->current_ssid,
 124                                             try_opportunistic) == 0)
 125                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
 126                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 127                 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
 128                                               wpa_s->sme.assoc_req_ie,
 129                                               &wpa_s->sme.assoc_req_ie_len)) {
 130                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 131                                 "key management and encryption suites");
 132                         return;
 133                 }
 134         } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
 135                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 136                 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
 137                                               wpa_s->sme.assoc_req_ie,
 138                                               &wpa_s->sme.assoc_req_ie_len)) {
 139                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 140                                 "key management and encryption suites (no "
 141                                 "scan results)");
 142                         return;
 143                 }
 144 #ifdef CONFIG_WPS
 145         } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 146                 struct wpabuf *wps_ie;
 147                 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
 148                 if (wps_ie && wpabuf_len(wps_ie) <=
 149                     sizeof(wpa_s->sme.assoc_req_ie)) {
 150                         wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
 151                         os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
 152                                   wpa_s->sme.assoc_req_ie_len);
 153                 } else
 154                         wpa_s->sme.assoc_req_ie_len = 0;
 155                 wpabuf_free(wps_ie);
 156                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 157 #endif /* CONFIG_WPS */
 158         } else {
 159                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 160                 wpa_s->sme.assoc_req_ie_len = 0;
 161         }
 162
 163 #ifdef CONFIG_IEEE80211R
 164         ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
 165         if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
 166                 md = ie + 2;
 167         wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
 168         if (md) {
 169                 /* Prepare for the next transition */
 170                 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
 171         }
 172
 173         if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) {
 174                 if (wpa_s->sme.assoc_req_ie_len + 5 <
 175                     sizeof(wpa_s->sme.assoc_req_ie)) {
 176                         struct rsn_mdie *mdie;
 177                         u8 *pos = wpa_s->sme.assoc_req_ie +
 178                                 wpa_s->sme.assoc_req_ie_len;
 179                         *pos++ = WLAN_EID_MOBILITY_DOMAIN;
 180                         *pos++ = sizeof(*mdie);
 181                         mdie = (struct rsn_mdie *) pos;
 182                         os_memcpy(mdie->mobility_domain, md,
 183                                   MOBILITY_DOMAIN_ID_LEN);
 184                         mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
 185                         wpa_s->sme.assoc_req_ie_len += 5;
 186                 }
 187
 188                 if (wpa_s->sme.ft_used &&
 189                     os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
 190                     wpa_sm_has_ptk(wpa_s->wpa)) {
 191                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT "
 192                                 "over-the-air");
 193                         params.auth_alg = WPA_AUTH_ALG_FT;
 194                         params.ie = wpa_s->sme.ft_ies;
 195                         params.ie_len = wpa_s->sme.ft_ies_len;
 196                 }
 197         }
 198 #endif /* CONFIG_IEEE80211R */
 199
 200 #ifdef CONFIG_IEEE80211W
 201         wpa_s->sme.mfp = ssid->ieee80211w;
 202         if (ssid->ieee80211w != NO_MGMT_FRAME_PROTECTION) {
 203                 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 204                 struct wpa_ie_data _ie;
 205                 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
 206                     _ie.capabilities &
 207                     (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
 208                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
 209                                 "MFP: require MFP");
 210                         wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
 211                 }
 212         }
 213 #endif /* CONFIG_IEEE80211W */
 214
 215 #ifdef CONFIG_P2P
 216         if (wpa_s->global->p2p) {
 217                 u8 *pos;
 218                 size_t len;
 219                 int res;
 220                 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
 221                 len = sizeof(wpa_s->sme.assoc_req_ie) -
 222                         wpa_s->sme.assoc_req_ie_len;
 223                 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
 224                                             ssid->p2p_group);
 225                 if (res >= 0)
 226                         wpa_s->sme.assoc_req_ie_len += res;
 227         }
 228 #endif /* CONFIG_P2P */
 229
 230 #ifdef CONFIG_INTERWORKING
 231         if (wpa_s->conf->interworking) {
 232                 u8 *pos = wpa_s->sme.assoc_req_ie;
 233                 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
 234                         pos += 2 + pos[1];
 235                 os_memmove(pos + 6, pos,
 236                            wpa_s->sme.assoc_req_ie_len -
 237                            (pos - wpa_s->sme.assoc_req_ie));
 238                 wpa_s->sme.assoc_req_ie_len += 6;
 239                 *pos++ = WLAN_EID_EXT_CAPAB;
 240                 *pos++ = 4;
 241                 *pos++ = 0x00;
 242                 *pos++ = 0x00;
 243                 *pos++ = 0x00;
 244                 *pos++ = 0x80; /* Bit 31 - Interworking */
 245         }
 246 #endif /* CONFIG_INTERWORKING */
 247
 248         wpa_supplicant_cancel_sched_scan(wpa_s);
 249         wpa_supplicant_cancel_scan(wpa_s);
 250
 251         wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
 252                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 253                 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
 254
 255         wpa_clear_keys(wpa_s, bss->bssid);
 256         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 257         old_ssid = wpa_s->current_ssid;
 258         wpa_s->current_ssid = ssid;
 259         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
 260         wpa_supplicant_initiate_eapol(wpa_s);
 261         if (old_ssid != wpa_s->current_ssid)
 262                 wpas_notify_network_changed(wpa_s);
 263
 264         wpa_s->sme.auth_alg = params.auth_alg;
 265         if (wpa_drv_authenticate(wpa_s, &params) < 0) {
 266                 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
 267                         "driver failed");
 268                 wpas_connection_failed(wpa_s, bss->bssid);
 269                 wpa_supplicant_mark_disassoc(wpa_s);
 270                 return;
 271         }
 272
 273         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 274                                NULL);
 275
 276         /*
 277          * Association will be started based on the authentication event from
 278          * the driver.
 279          */
 280 }
 281
 282
 283 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
 284 {
 285         struct wpa_ssid *ssid = wpa_s->current_ssid;
 286
 287         if (ssid == NULL) {
 288                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 289                         "when network is not selected");
 290                 return;
 291         }
 292
 293         if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
 294                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 295                         "when not in authenticating state");
 296                 return;
 297         }
 298
 299         if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
 300                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
 301                         "unexpected peer " MACSTR,
 302                         MAC2STR(data->auth.peer));
 303                 return;
 304         }
 305
 306         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
 307                 " auth_type=%d status_code=%d",
 308                 MAC2STR(data->auth.peer), data->auth.auth_type,
 309                 data->auth.status_code);
 310         wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
 311                     data->auth.ies, data->auth.ies_len);
 312
 313         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 314
 315         if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
 316                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
 317                         "code %d)", data->auth.status_code);
 318
 319                 if (data->auth.status_code !=
 320                     WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
 321                     wpa_s->sme.auth_alg == data->auth.auth_type ||
 322                     wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
 323                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 324                         return;
 325                 }
 326
 327                 switch (data->auth.auth_type) {
 328                 case WLAN_AUTH_OPEN:
 329                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 330
 331                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
 332                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 333                                                  wpa_s->current_ssid);
 334                         return;
 335
 336                 case WLAN_AUTH_SHARED_KEY:
 337                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
 338
 339                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
 340                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 341                                                  wpa_s->current_ssid);
 342                         return;
 343
 344                 default:
 345                         return;
 346                 }
 347         }
 348
 349 #ifdef CONFIG_IEEE80211R
 350         if (data->auth.auth_type == WLAN_AUTH_FT) {
 351                 union wpa_event_data edata;
 352                 os_memset(&edata, 0, sizeof(edata));
 353                 edata.ft_ies.ies = data->auth.ies;
 354                 edata.ft_ies.ies_len = data->auth.ies_len;
 355                 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
 356                 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
 357         }
 358 #endif /* CONFIG_IEEE80211R */
 359
 360         sme_associate(wpa_s, ssid->mode, data->auth.peer,
 361                       data->auth.auth_type);
 362 }
 363
 364
 365 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
 366                    const u8 *bssid, u16 auth_type)
 367 {
 368         struct wpa_driver_associate_params params;
 369         struct ieee802_11_elems elems;
 370
 371         os_memset(&params, 0, sizeof(params));
 372         params.bssid = bssid;
 373         params.ssid = wpa_s->sme.ssid;
 374         params.ssid_len = wpa_s->sme.ssid_len;
 375         params.freq = wpa_s->sme.freq;
 376         params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
 377                 wpa_s->sme.assoc_req_ie : NULL;
 378         params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
 379         params.pairwise_suite = cipher_suite2driver(wpa_s->pairwise_cipher);
 380         params.group_suite = cipher_suite2driver(wpa_s->group_cipher);
 381 #ifdef CONFIG_IEEE80211R
 382         if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
 383                 params.wpa_ie = wpa_s->sme.ft_ies;
 384                 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
 385         }
 386 #endif /* CONFIG_IEEE80211R */
 387         params.mode = mode;
 388         params.mgmt_frame_protection = wpa_s->sme.mfp;
 389         if (wpa_s->sme.prev_bssid_set)
 390                 params.prev_bssid = wpa_s->sme.prev_bssid;
 391
 392         wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
 393                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 394                 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
 395                 params.freq);
 396
 397         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
 398
 399         if (params.wpa_ie == NULL ||
 400             ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
 401             < 0) {
 402                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
 403                 os_memset(&elems, 0, sizeof(elems));
 404         }
 405         if (elems.rsn_ie) {
 406                 params.wpa_proto = WPA_PROTO_RSN;
 407                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
 408                                         elems.rsn_ie_len + 2);
 409         } else if (elems.wpa_ie) {
 410                 params.wpa_proto = WPA_PROTO_WPA;
 411                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
 412                                         elems.wpa_ie_len + 2);
 413         } else
 414                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 415         if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
 416                 params.p2p = 1;
 417
 418         if (wpa_s->parent->set_sta_uapsd)
 419                 params.uapsd = wpa_s->parent->sta_uapsd;
 420         else
 421                 params.uapsd = -1;
 422
 423         if (wpa_drv_associate(wpa_s, &params) < 0) {
 424                 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
 425                         "driver failed");
 426                 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 427                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 428                 return;
 429         }
 430
 431         eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
 432                                NULL);
 433 }
 434
 435
 436 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
 437                       const u8 *ies, size_t ies_len)
 438 {
 439         if (md == NULL || ies == NULL) {
 440                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
 441                 os_free(wpa_s->sme.ft_ies);
 442                 wpa_s->sme.ft_ies = NULL;
 443                 wpa_s->sme.ft_ies_len = 0;
 444                 wpa_s->sme.ft_used = 0;
 445                 return 0;
 446         }
 447
 448         os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
 449         wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
 450         os_free(wpa_s->sme.ft_ies);
 451         wpa_s->sme.ft_ies = os_malloc(ies_len);
 452         if (wpa_s->sme.ft_ies == NULL)
 453                 return -1;
 454         os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
 455         wpa_s->sme.ft_ies_len = ies_len;
 456         return 0;
 457 }
 458
 459
 460 static void sme_deauth(struct wpa_supplicant *wpa_s)
 461 {
 462         int bssid_changed;
 463
 464         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 465
 466         if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
 467                                    WLAN_REASON_DEAUTH_LEAVING) < 0) {
 468                 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
 469                         "failed");
 470         }
 471         wpa_s->sme.prev_bssid_set = 0;
 472
 473         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 474         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 475         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 476         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 477         if (bssid_changed)
 478                 wpas_notify_bssid_changed(wpa_s);
 479 }
 480
 481
 482 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
 483                             union wpa_event_data *data)
 484 {
 485         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
 486                 "status code %d", MAC2STR(wpa_s->pending_bssid),
 487                 data->assoc_reject.status_code);
 488
 489         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 490
 491         /*
 492          * For now, unconditionally terminate the previous authentication. In
 493          * theory, this should not be needed, but mac80211 gets quite confused
 494          * if the authentication is left pending.. Some roaming cases might
 495          * benefit from using the previous authentication, so this could be
 496          * optimized in the future.
 497          */
 498         sme_deauth(wpa_s);
 499 }
 500
 501
 502 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
 503                               union wpa_event_data *data)
 504 {
 505         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
 506         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 507         wpa_supplicant_mark_disassoc(wpa_s);
 508 }
 509
 510
 511 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
 512                                union wpa_event_data *data)
 513 {
 514         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
 515         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 516         wpa_supplicant_mark_disassoc(wpa_s);
 517 }
 518
 519
 520 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
 521                         union wpa_event_data *data)
 522 {
 523         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
 524         if (wpa_s->sme.prev_bssid_set) {
 525                 /*
 526                  * cfg80211/mac80211 can get into somewhat confused state if
 527                  * the AP only disassociates us and leaves us in authenticated
 528                  * state. For now, force the state to be cleared to avoid
 529                  * confusing errors if we try to associate with the AP again.
 530                  */
 531                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
 532                         "driver state");
 533                 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
 534                                        WLAN_REASON_DEAUTH_LEAVING);
 535         }
 536 }
 537
 538
 539 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
 540 {
 541         struct wpa_supplicant *wpa_s = eloop_ctx;
 542         if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
 543                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
 544                 sme_deauth(wpa_s);
 545         }
 546 }
 547
 548
 549 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
 550 {
 551         struct wpa_supplicant *wpa_s = eloop_ctx;
 552         if (wpa_s->wpa_state == WPA_ASSOCIATING) {
 553                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
 554                 sme_deauth(wpa_s);
 555         }
 556 }
 557
 558
 559 void sme_state_changed(struct wpa_supplicant *wpa_s)
 560 {
 561         /* Make sure timers are cleaned up appropriately. */
 562         if (wpa_s->wpa_state != WPA_ASSOCIATING)
 563                 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 564         if (wpa_s->wpa_state != WPA_AUTHENTICATING)
 565                 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 566 }
 567
 568
 569 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
 570                                        const u8 *prev_pending_bssid)
 571 {
 572         /*
 573          * mac80211-workaround to force deauth on failed auth cmd,
 574          * requires us to remain in authenticating state to allow the
 575          * second authentication attempt to be continued properly.
 576          */
 577         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
 578                 "to proceed after disconnection event");
 579         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 580         os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
 581
 582         /*
 583          * Re-arm authentication timer in case auth fails for whatever reason.
 584          */
 585         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 586         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 587                                NULL);
 588 }
 589
 590
 591 void sme_deinit(struct wpa_supplicant *wpa_s)
 592 {
 593         os_free(wpa_s->sme.ft_ies);
 594         wpa_s->sme.ft_ies = NULL;
 595         wpa_s->sme.ft_ies_len = 0;
 596 #ifdef CONFIG_IEEE80211W
 597         sme_stop_sa_query(wpa_s);
 598 #endif /* CONFIG_IEEE80211W */
 599
 600         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 601         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 602 }
 603
 604
 605 #ifdef CONFIG_IEEE80211W
 606
 607 static const unsigned int sa_query_max_timeout = 1000;
 608 static const unsigned int sa_query_retry_timeout = 201;
 609
 610 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
 611 {
 612         u32 tu;
 613         struct os_time now, passed;
 614         os_get_time(&now);
 615         os_time_sub(&now, &wpa_s->sme.sa_query_start, &passed);
 616         tu = (passed.sec * 1000000 + passed.usec) / 1024;
 617         if (sa_query_max_timeout < tu) {
 618                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
 619                 sme_stop_sa_query(wpa_s);
 620                 wpa_supplicant_deauthenticate(
 621                         wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
 622                 return 1;
 623         }
 624
 625         return 0;
 626 }
 627
 628
 629 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
 630                                   const u8 *trans_id)
 631 {
 632         u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
 633         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
 634                 MACSTR, MAC2STR(wpa_s->bssid));
 635         wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
 636                     trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 637         req[0] = WLAN_ACTION_SA_QUERY;
 638         req[1] = WLAN_SA_QUERY_REQUEST;
 639         os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 640         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
 641                                 wpa_s->own_addr, wpa_s->bssid,
 642                                 req, sizeof(req), 0) < 0)
 643                 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
 644                         "Request");
 645 }
 646
 647
 648 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
 649 {
 650         struct wpa_supplicant *wpa_s = eloop_ctx;
 651         unsigned int timeout, sec, usec;
 652         u8 *trans_id, *nbuf;
 653
 654         if (wpa_s->sme.sa_query_count > 0 &&
 655             sme_check_sa_query_timeout(wpa_s))
 656                 return;
 657
 658         nbuf = os_realloc(wpa_s->sme.sa_query_trans_id,
 659                           (wpa_s->sme.sa_query_count + 1) *
 660                           WLAN_SA_QUERY_TR_ID_LEN);
 661         if (nbuf == NULL)
 662                 return;
 663         if (wpa_s->sme.sa_query_count == 0) {
 664                 /* Starting a new SA Query procedure */
 665                 os_get_time(&wpa_s->sme.sa_query_start);
 666         }
 667         trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
 668         wpa_s->sme.sa_query_trans_id = nbuf;
 669         wpa_s->sme.sa_query_count++;
 670
 671         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 672
 673         timeout = sa_query_retry_timeout;
 674         sec = ((timeout / 1000) * 1024) / 1000;
 675         usec = (timeout % 1000) * 1024;
 676         eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
 677
 678         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
 679                 wpa_s->sme.sa_query_count);
 680
 681         sme_send_sa_query_req(wpa_s, trans_id);
 682 }
 683
 684
 685 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
 686 {
 687         sme_sa_query_timer(wpa_s, NULL);
 688 }
 689
 690
 691 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
 692 {
 693         eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
 694         os_free(wpa_s->sme.sa_query_trans_id);
 695         wpa_s->sme.sa_query_trans_id = NULL;
 696         wpa_s->sme.sa_query_count = 0;
 697 }
 698
 699
 700 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
 701                                  const u8 *da, u16 reason_code)
 702 {
 703         struct wpa_ssid *ssid;
 704
 705         if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME))
 706                 return;
 707         if (wpa_s->wpa_state != WPA_COMPLETED)
 708                 return;
 709         ssid = wpa_s->current_ssid;
 710         if (ssid == NULL || ssid->ieee80211w == 0)
 711                 return;
 712         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
 713                 return;
 714         if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
 715             reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
 716                 return;
 717         if (wpa_s->sme.sa_query_count > 0)
 718                 return;
 719
 720         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
 721                 "possible AP/STA state mismatch - trigger SA Query");
 722         sme_start_sa_query(wpa_s);
 723 }
 724
 725
 726 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
 727                      const u8 *data, size_t len)
 728 {
 729         int i;
 730
 731         if (wpa_s->sme.sa_query_trans_id == NULL ||
 732             len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
 733             data[0] != WLAN_SA_QUERY_RESPONSE)
 734                 return;
 735         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
 736                 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
 737
 738         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
 739                 return;
 740
 741         for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
 742                 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
 743                               i * WLAN_SA_QUERY_TR_ID_LEN,
 744                               data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
 745                         break;
 746         }
 747
 748         if (i >= wpa_s->sme.sa_query_count) {
 749                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
 750                         "transaction identifier found");
 751                 return;
 752         }
 753
 754         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
 755                 "from " MACSTR, MAC2STR(sa));
 756         sme_stop_sa_query(wpa_s);
 757 }
 758
 759 #endif /* CONFIG_IEEE80211W */