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 "blacklist.h"
  33 #include "bss.h"
  34 #include "scan.h"
  35 #include "sme.h"
  36
  37 #define SME_AUTH_TIMEOUT 5
  38 #define SME_ASSOC_TIMEOUT 5
  39
  40 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx);
  41 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx);
  42 #ifdef CONFIG_IEEE80211W
  43 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s);
  44 #endif /* CONFIG_IEEE80211W */
  45
  46
  47 void sme_authenticate(struct wpa_supplicant *wpa_s,
  48                       struct wpa_bss *bss, struct wpa_ssid *ssid)
  49 {
  50         struct wpa_driver_auth_params params;
  51         struct wpa_ssid *old_ssid;
  52 #ifdef CONFIG_IEEE80211R
  53         const u8 *ie;
  54 #endif /* CONFIG_IEEE80211R */
  55 #ifdef CONFIG_IEEE80211R
  56         const u8 *md = NULL;
  57 #endif /* CONFIG_IEEE80211R */
  58         int i, bssid_changed;
  59
  60         if (bss == NULL) {
  61                 wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for "
  62                         "the network");
  63                 return;
  64         }
  65
  66         wpa_s->current_bss = bss;
  67
  68         os_memset(&params, 0, sizeof(params));
  69         wpa_s->reassociate = 0;
  70
  71         params.freq = bss->freq;
  72         params.bssid = bss->bssid;
  73         params.ssid = bss->ssid;
  74         params.ssid_len = bss->ssid_len;
  75         params.p2p = ssid->p2p_group;
  76
  77         if (wpa_s->sme.ssid_len != params.ssid_len ||
  78             os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
  79                 wpa_s->sme.prev_bssid_set = 0;
  80
  81         wpa_s->sme.freq = params.freq;
  82         os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
  83         wpa_s->sme.ssid_len = params.ssid_len;
  84
  85         params.auth_alg = WPA_AUTH_ALG_OPEN;
  86 #ifdef IEEE8021X_EAPOL
  87         if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
  88                 if (ssid->leap) {
  89                         if (ssid->non_leap == 0)
  90                                 params.auth_alg = WPA_AUTH_ALG_LEAP;
  91                         else
  92                                 params.auth_alg |= WPA_AUTH_ALG_LEAP;
  93                 }
  94         }
  95 #endif /* IEEE8021X_EAPOL */
  96         wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
  97                 params.auth_alg);
  98         if (ssid->auth_alg) {
  99                 params.auth_alg = ssid->auth_alg;
 100                 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
 101                         "0x%x", params.auth_alg);
 102         }
 103
 104         for (i = 0; i < NUM_WEP_KEYS; i++) {
 105                 if (ssid->wep_key_len[i])
 106                         params.wep_key[i] = ssid->wep_key[i];
 107                 params.wep_key_len[i] = ssid->wep_key_len[i];
 108         }
 109         params.wep_tx_keyidx = ssid->wep_tx_keyidx;
 110
 111         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 112         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 113         os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
 114         if (bssid_changed)
 115                 wpas_notify_bssid_changed(wpa_s);
 116
 117         if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
 118              wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
 119             (ssid->key_mgmt & (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK |
 120                                WPA_KEY_MGMT_FT_IEEE8021X |
 121                                WPA_KEY_MGMT_FT_PSK |
 122                                WPA_KEY_MGMT_IEEE8021X_SHA256 |
 123                                WPA_KEY_MGMT_PSK_SHA256))) {
 124                 int try_opportunistic;
 125                 try_opportunistic = ssid->proactive_key_caching &&
 126                         (ssid->proto & WPA_PROTO_RSN);
 127                 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
 128                                             wpa_s->current_ssid,
 129                                             try_opportunistic) == 0)
 130                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
 131                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 132                 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
 133                                               wpa_s->sme.assoc_req_ie,
 134                                               &wpa_s->sme.assoc_req_ie_len)) {
 135                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 136                                 "key management and encryption suites");
 137                         return;
 138                 }
 139         } else if (ssid->key_mgmt &
 140                    (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
 141                     WPA_KEY_MGMT_WPA_NONE | WPA_KEY_MGMT_FT_PSK |
 142                     WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_PSK_SHA256 |
 143                     WPA_KEY_MGMT_IEEE8021X_SHA256)) {
 144                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 145                 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
 146                                               wpa_s->sme.assoc_req_ie,
 147                                               &wpa_s->sme.assoc_req_ie_len)) {
 148                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 149                                 "key management and encryption suites (no "
 150                                 "scan results)");
 151                         return;
 152                 }
 153 #ifdef CONFIG_WPS
 154         } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 155                 struct wpabuf *wps_ie;
 156                 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
 157                 if (wps_ie && wpabuf_len(wps_ie) <=
 158                     sizeof(wpa_s->sme.assoc_req_ie)) {
 159                         wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
 160                         os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
 161                                   wpa_s->sme.assoc_req_ie_len);
 162                 } else
 163                         wpa_s->sme.assoc_req_ie_len = 0;
 164                 wpabuf_free(wps_ie);
 165                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 166 #endif /* CONFIG_WPS */
 167         } else {
 168                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 169                 wpa_s->sme.assoc_req_ie_len = 0;
 170         }
 171
 172 #ifdef CONFIG_IEEE80211R
 173         ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
 174         if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
 175                 md = ie + 2;
 176         wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
 177         if (md) {
 178                 /* Prepare for the next transition */
 179                 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
 180         }
 181
 182         if (md && ssid->key_mgmt & (WPA_KEY_MGMT_FT_PSK |
 183                                     WPA_KEY_MGMT_FT_IEEE8021X)) {
 184                 if (wpa_s->sme.assoc_req_ie_len + 5 <
 185                     sizeof(wpa_s->sme.assoc_req_ie)) {
 186                         struct rsn_mdie *mdie;
 187                         u8 *pos = wpa_s->sme.assoc_req_ie +
 188                                 wpa_s->sme.assoc_req_ie_len;
 189                         *pos++ = WLAN_EID_MOBILITY_DOMAIN;
 190                         *pos++ = sizeof(*mdie);
 191                         mdie = (struct rsn_mdie *) pos;
 192                         os_memcpy(mdie->mobility_domain, md,
 193                                   MOBILITY_DOMAIN_ID_LEN);
 194                         mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
 195                         wpa_s->sme.assoc_req_ie_len += 5;
 196                 }
 197
 198                 if (wpa_s->sme.ft_used &&
 199                     os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
 200                     wpa_sm_has_ptk(wpa_s->wpa)) {
 201                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT "
 202                                 "over-the-air");
 203                         params.auth_alg = WPA_AUTH_ALG_FT;
 204                         params.ie = wpa_s->sme.ft_ies;
 205                         params.ie_len = wpa_s->sme.ft_ies_len;
 206                 }
 207         }
 208 #endif /* CONFIG_IEEE80211R */
 209
 210 #ifdef CONFIG_IEEE80211W
 211         wpa_s->sme.mfp = ssid->ieee80211w;
 212         if (ssid->ieee80211w != NO_MGMT_FRAME_PROTECTION) {
 213                 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 214                 struct wpa_ie_data _ie;
 215                 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
 216                     _ie.capabilities &
 217                     (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
 218                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
 219                                 "MFP: require MFP");
 220                         wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
 221                 }
 222         }
 223 #endif /* CONFIG_IEEE80211W */
 224
 225 #ifdef CONFIG_P2P
 226         if (wpa_s->global->p2p) {
 227                 u8 *pos;
 228                 size_t len;
 229                 int res;
 230                 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
 231                 len = sizeof(wpa_s->sme.assoc_req_ie) -
 232                         wpa_s->sme.assoc_req_ie_len;
 233                 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
 234                                             ssid->p2p_group);
 235                 if (res >= 0)
 236                         wpa_s->sme.assoc_req_ie_len += res;
 237         }
 238 #endif /* CONFIG_P2P */
 239
 240 #ifdef CONFIG_INTERWORKING
 241         if (wpa_s->conf->interworking) {
 242                 u8 *pos = wpa_s->sme.assoc_req_ie;
 243                 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
 244                         pos += 2 + pos[1];
 245                 os_memmove(pos + 6, pos,
 246                            wpa_s->sme.assoc_req_ie_len -
 247                            (pos - wpa_s->sme.assoc_req_ie));
 248                 wpa_s->sme.assoc_req_ie_len += 6;
 249                 *pos++ = WLAN_EID_EXT_CAPAB;
 250                 *pos++ = 4;
 251                 *pos++ = 0x00;
 252                 *pos++ = 0x00;
 253                 *pos++ = 0x00;
 254                 *pos++ = 0x80; /* Bit 31 - Interworking */
 255         }
 256 #endif /* CONFIG_INTERWORKING */
 257
 258         wpa_supplicant_cancel_sched_scan(wpa_s);
 259         wpa_supplicant_cancel_scan(wpa_s);
 260
 261         wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
 262                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 263                 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
 264
 265         wpa_clear_keys(wpa_s, bss->bssid);
 266         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 267         old_ssid = wpa_s->current_ssid;
 268         wpa_s->current_ssid = ssid;
 269         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
 270         wpa_supplicant_initiate_eapol(wpa_s);
 271         if (old_ssid != wpa_s->current_ssid)
 272                 wpas_notify_network_changed(wpa_s);
 273
 274         wpa_s->sme.auth_alg = params.auth_alg;
 275         if (wpa_drv_authenticate(wpa_s, &params) < 0) {
 276                 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
 277                         "driver failed");
 278                 wpa_supplicant_req_scan(wpa_s, 1, 0);
 279                 return;
 280         }
 281
 282         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 283                                NULL);
 284
 285         /*
 286          * Association will be started based on the authentication event from
 287          * the driver.
 288          */
 289 }
 290
 291
 292 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
 293 {
 294         struct wpa_ssid *ssid = wpa_s->current_ssid;
 295
 296         if (ssid == NULL) {
 297                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 298                         "when network is not selected");
 299                 return;
 300         }
 301
 302         if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
 303                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 304                         "when not in authenticating state");
 305                 return;
 306         }
 307
 308         if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
 309                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
 310                         "unexpected peer " MACSTR,
 311                         MAC2STR(data->auth.peer));
 312                 return;
 313         }
 314
 315         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
 316                 " auth_type=%d status_code=%d",
 317                 MAC2STR(data->auth.peer), data->auth.auth_type,
 318                 data->auth.status_code);
 319         wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
 320                     data->auth.ies, data->auth.ies_len);
 321
 322         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 323
 324         if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
 325                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
 326                         "code %d)", data->auth.status_code);
 327
 328                 if (data->auth.status_code !=
 329                     WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
 330                     wpa_s->sme.auth_alg == data->auth.auth_type ||
 331                     wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
 332                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 333                         return;
 334                 }
 335
 336                 switch (data->auth.auth_type) {
 337                 case WLAN_AUTH_OPEN:
 338                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 339
 340                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
 341                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 342                                                  wpa_s->current_ssid);
 343                         return;
 344
 345                 case WLAN_AUTH_SHARED_KEY:
 346                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
 347
 348                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
 349                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 350                                                  wpa_s->current_ssid);
 351                         return;
 352
 353                 default:
 354                         return;
 355                 }
 356         }
 357
 358 #ifdef CONFIG_IEEE80211R
 359         if (data->auth.auth_type == WLAN_AUTH_FT) {
 360                 union wpa_event_data edata;
 361                 os_memset(&edata, 0, sizeof(edata));
 362                 edata.ft_ies.ies = data->auth.ies;
 363                 edata.ft_ies.ies_len = data->auth.ies_len;
 364                 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
 365                 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
 366         }
 367 #endif /* CONFIG_IEEE80211R */
 368
 369         sme_associate(wpa_s, ssid->mode, data->auth.peer,
 370                       data->auth.auth_type);
 371 }
 372
 373
 374 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
 375                    const u8 *bssid, u16 auth_type)
 376 {
 377         struct wpa_driver_associate_params params;
 378         struct ieee802_11_elems elems;
 379
 380         os_memset(&params, 0, sizeof(params));
 381         params.bssid = bssid;
 382         params.ssid = wpa_s->sme.ssid;
 383         params.ssid_len = wpa_s->sme.ssid_len;
 384         params.freq = wpa_s->sme.freq;
 385         params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
 386                 wpa_s->sme.assoc_req_ie : NULL;
 387         params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
 388         params.pairwise_suite = cipher_suite2driver(wpa_s->pairwise_cipher);
 389         params.group_suite = cipher_suite2driver(wpa_s->group_cipher);
 390 #ifdef CONFIG_IEEE80211R
 391         if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
 392                 params.wpa_ie = wpa_s->sme.ft_ies;
 393                 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
 394         }
 395 #endif /* CONFIG_IEEE80211R */
 396         params.mode = mode;
 397         params.mgmt_frame_protection = wpa_s->sme.mfp;
 398         if (wpa_s->sme.prev_bssid_set)
 399                 params.prev_bssid = wpa_s->sme.prev_bssid;
 400
 401         wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
 402                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 403                 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
 404                 params.freq);
 405
 406         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
 407
 408         if (params.wpa_ie == NULL ||
 409             ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
 410             < 0) {
 411                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
 412                 os_memset(&elems, 0, sizeof(elems));
 413         }
 414         if (elems.rsn_ie) {
 415                 params.wpa_proto = WPA_PROTO_RSN;
 416                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
 417                                         elems.rsn_ie_len + 2);
 418         } else if (elems.wpa_ie) {
 419                 params.wpa_proto = WPA_PROTO_WPA;
 420                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
 421                                         elems.wpa_ie_len + 2);
 422         } else
 423                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 424         if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
 425                 params.p2p = 1;
 426
 427         if (wpa_s->parent->set_sta_uapsd)
 428                 params.uapsd = wpa_s->parent->sta_uapsd;
 429         else
 430                 params.uapsd = -1;
 431
 432         if (wpa_drv_associate(wpa_s, &params) < 0) {
 433                 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
 434                         "driver failed");
 435                 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 436                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 437                 return;
 438         }
 439
 440         eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
 441                                NULL);
 442 }
 443
 444
 445 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
 446                       const u8 *ies, size_t ies_len)
 447 {
 448         if (md == NULL || ies == NULL) {
 449                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
 450                 os_free(wpa_s->sme.ft_ies);
 451                 wpa_s->sme.ft_ies = NULL;
 452                 wpa_s->sme.ft_ies_len = 0;
 453                 wpa_s->sme.ft_used = 0;
 454                 return 0;
 455         }
 456
 457         os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
 458         wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
 459         os_free(wpa_s->sme.ft_ies);
 460         wpa_s->sme.ft_ies = os_malloc(ies_len);
 461         if (wpa_s->sme.ft_ies == NULL)
 462                 return -1;
 463         os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
 464         wpa_s->sme.ft_ies_len = ies_len;
 465         return 0;
 466 }
 467
 468
 469 static void sme_deauth(struct wpa_supplicant *wpa_s)
 470 {
 471         int bssid_changed;
 472
 473         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 474
 475         if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
 476                                    WLAN_REASON_DEAUTH_LEAVING) < 0) {
 477                 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
 478                         "failed");
 479         }
 480         wpa_s->sme.prev_bssid_set = 0;
 481
 482         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 483         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 484         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 485         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 486         if (bssid_changed)
 487                 wpas_notify_bssid_changed(wpa_s);
 488 }
 489
 490
 491 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
 492                             union wpa_event_data *data)
 493 {
 494         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
 495                 "status code %d", MAC2STR(wpa_s->pending_bssid),
 496                 data->assoc_reject.status_code);
 497
 498         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 499
 500         /*
 501          * For now, unconditionally terminate the previous authentication. In
 502          * theory, this should not be needed, but mac80211 gets quite confused
 503          * if the authentication is left pending.. Some roaming cases might
 504          * benefit from using the previous authentication, so this could be
 505          * optimized in the future.
 506          */
 507         sme_deauth(wpa_s);
 508 }
 509
 510
 511 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
 512                               union wpa_event_data *data)
 513 {
 514         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
 515         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 516 }
 517
 518
 519 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
 520                                union wpa_event_data *data)
 521 {
 522         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
 523         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 524         wpa_supplicant_mark_disassoc(wpa_s);
 525 }
 526
 527
 528 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
 529                         union wpa_event_data *data)
 530 {
 531         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
 532         if (wpa_s->sme.prev_bssid_set) {
 533                 /*
 534                  * cfg80211/mac80211 can get into somewhat confused state if
 535                  * the AP only disassociates us and leaves us in authenticated
 536                  * state. For now, force the state to be cleared to avoid
 537                  * confusing errors if we try to associate with the AP again.
 538                  */
 539                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
 540                         "driver state");
 541                 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
 542                                        WLAN_REASON_DEAUTH_LEAVING);
 543         }
 544 }
 545
 546
 547 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
 548 {
 549         struct wpa_supplicant *wpa_s = eloop_ctx;
 550         if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
 551                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
 552                 sme_deauth(wpa_s);
 553         }
 554 }
 555
 556
 557 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
 558 {
 559         struct wpa_supplicant *wpa_s = eloop_ctx;
 560         if (wpa_s->wpa_state == WPA_ASSOCIATING) {
 561                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
 562                 sme_deauth(wpa_s);
 563         }
 564 }
 565
 566
 567 void sme_state_changed(struct wpa_supplicant *wpa_s)
 568 {
 569         /* Make sure timers are cleaned up appropriately. */
 570         if (wpa_s->wpa_state != WPA_ASSOCIATING)
 571                 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 572         if (wpa_s->wpa_state != WPA_AUTHENTICATING)
 573                 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 574 }
 575
 576
 577 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
 578                                        const u8 *prev_pending_bssid)
 579 {
 580         /*
 581          * mac80211-workaround to force deauth on failed auth cmd,
 582          * requires us to remain in authenticating state to allow the
 583          * second authentication attempt to be continued properly.
 584          */
 585         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
 586                 "to proceed after disconnection event");
 587         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 588         os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
 589
 590         /*
 591          * Re-arm authentication timer in case auth fails for whatever reason.
 592          */
 593         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 594         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 595                                NULL);
 596 }
 597
 598
 599 void sme_deinit(struct wpa_supplicant *wpa_s)
 600 {
 601         os_free(wpa_s->sme.ft_ies);
 602         wpa_s->sme.ft_ies = NULL;
 603         wpa_s->sme.ft_ies_len = 0;
 604 #ifdef CONFIG_IEEE80211W
 605         sme_stop_sa_query(wpa_s);
 606 #endif /* CONFIG_IEEE80211W */
 607
 608         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 609         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 610 }
 611
 612
 613 #ifdef CONFIG_IEEE80211W
 614
 615 static const unsigned int sa_query_max_timeout = 1000;
 616 static const unsigned int sa_query_retry_timeout = 201;
 617
 618 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
 619 {
 620         u32 tu;
 621         struct os_time now, passed;
 622         os_get_time(&now);
 623         os_time_sub(&now, &wpa_s->sme.sa_query_start, &passed);
 624         tu = (passed.sec * 1000000 + passed.usec) / 1024;
 625         if (sa_query_max_timeout < tu) {
 626                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
 627                 sme_stop_sa_query(wpa_s);
 628                 wpa_supplicant_deauthenticate(
 629                         wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
 630                 return 1;
 631         }
 632
 633         return 0;
 634 }
 635
 636
 637 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
 638                                   const u8 *trans_id)
 639 {
 640         u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
 641         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
 642                 MACSTR, MAC2STR(wpa_s->bssid));
 643         wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
 644                     trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 645         req[0] = WLAN_ACTION_SA_QUERY;
 646         req[1] = WLAN_SA_QUERY_REQUEST;
 647         os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 648         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
 649                                 wpa_s->own_addr, wpa_s->bssid,
 650                                 req, sizeof(req)) < 0)
 651                 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
 652                         "Request");
 653 }
 654
 655
 656 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
 657 {
 658         struct wpa_supplicant *wpa_s = eloop_ctx;
 659         unsigned int timeout, sec, usec;
 660         u8 *trans_id, *nbuf;
 661
 662         if (wpa_s->sme.sa_query_count > 0 &&
 663             sme_check_sa_query_timeout(wpa_s))
 664                 return;
 665
 666         nbuf = os_realloc(wpa_s->sme.sa_query_trans_id,
 667                           (wpa_s->sme.sa_query_count + 1) *
 668                           WLAN_SA_QUERY_TR_ID_LEN);
 669         if (nbuf == NULL)
 670                 return;
 671         if (wpa_s->sme.sa_query_count == 0) {
 672                 /* Starting a new SA Query procedure */
 673                 os_get_time(&wpa_s->sme.sa_query_start);
 674         }
 675         trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
 676         wpa_s->sme.sa_query_trans_id = nbuf;
 677         wpa_s->sme.sa_query_count++;
 678
 679         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 680
 681         timeout = sa_query_retry_timeout;
 682         sec = ((timeout / 1000) * 1024) / 1000;
 683         usec = (timeout % 1000) * 1024;
 684         eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
 685
 686         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
 687                 wpa_s->sme.sa_query_count);
 688
 689         sme_send_sa_query_req(wpa_s, trans_id);
 690 }
 691
 692
 693 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
 694 {
 695         sme_sa_query_timer(wpa_s, NULL);
 696 }
 697
 698
 699 void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
 700 {
 701         eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
 702         os_free(wpa_s->sme.sa_query_trans_id);
 703         wpa_s->sme.sa_query_trans_id = NULL;
 704         wpa_s->sme.sa_query_count = 0;
 705 }
 706
 707
 708 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
 709                                  const u8 *da, u16 reason_code)
 710 {
 711         struct wpa_ssid *ssid;
 712
 713         if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME))
 714                 return;
 715         if (wpa_s->wpa_state != WPA_COMPLETED)
 716                 return;
 717         ssid = wpa_s->current_ssid;
 718         if (ssid == NULL || ssid->ieee80211w == 0)
 719                 return;
 720         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
 721                 return;
 722         if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
 723             reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
 724                 return;
 725         if (wpa_s->sme.sa_query_count > 0)
 726                 return;
 727
 728         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
 729                 "possible AP/STA state mismatch - trigger SA Query");
 730         sme_start_sa_query(wpa_s);
 731 }
 732
 733
 734 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
 735                      const u8 *data, size_t len)
 736 {
 737         int i;
 738
 739         if (wpa_s->sme.sa_query_trans_id == NULL ||
 740             len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
 741             data[0] != WLAN_SA_QUERY_RESPONSE)
 742                 return;
 743         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
 744                 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
 745
 746         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
 747                 return;
 748
 749         for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
 750                 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
 751                               i * WLAN_SA_QUERY_TR_ID_LEN,
 752                               data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
 753                         break;
 754         }
 755
 756         if (i >= wpa_s->sme.sa_query_count) {
 757                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
 758                         "transaction identifier found");
 759                 return;
 760         }
 761
 762         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
 763                 "from " MACSTR, MAC2STR(sa));
 764         sme_stop_sa_query(wpa_s);
 765 }
 766
 767 #endif /* CONFIG_IEEE80211W */