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         wpa_supplicant_cancel_sched_scan(wpa_s);
 241         wpa_supplicant_cancel_scan(wpa_s);
 242
 243         wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
 244                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 245                 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
 246
 247         wpa_clear_keys(wpa_s, bss->bssid);
 248         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 249         old_ssid = wpa_s->current_ssid;
 250         wpa_s->current_ssid = ssid;
 251         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
 252         wpa_supplicant_initiate_eapol(wpa_s);
 253         if (old_ssid != wpa_s->current_ssid)
 254                 wpas_notify_network_changed(wpa_s);
 255
 256         wpa_s->sme.auth_alg = params.auth_alg;
 257         if (wpa_drv_authenticate(wpa_s, &params) < 0) {
 258                 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
 259                         "driver failed");
 260                 wpa_supplicant_req_scan(wpa_s, 1, 0);
 261                 return;
 262         }
 263
 264         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 265                                NULL);
 266
 267         /*
 268          * Association will be started based on the authentication event from
 269          * the driver.
 270          */
 271 }
 272
 273
 274 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
 275 {
 276         struct wpa_ssid *ssid = wpa_s->current_ssid;
 277
 278         if (ssid == NULL) {
 279                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 280                         "when network is not selected");
 281                 return;
 282         }
 283
 284         if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
 285                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 286                         "when not in authenticating state");
 287                 return;
 288         }
 289
 290         if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
 291                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
 292                         "unexpected peer " MACSTR,
 293                         MAC2STR(data->auth.peer));
 294                 return;
 295         }
 296
 297         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
 298                 " auth_type=%d status_code=%d",
 299                 MAC2STR(data->auth.peer), data->auth.auth_type,
 300                 data->auth.status_code);
 301         wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
 302                     data->auth.ies, data->auth.ies_len);
 303
 304         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 305
 306         if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
 307                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
 308                         "code %d)", data->auth.status_code);
 309
 310                 if (data->auth.status_code !=
 311                     WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
 312                     wpa_s->sme.auth_alg == data->auth.auth_type ||
 313                     wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
 314                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 315                         return;
 316                 }
 317
 318                 switch (data->auth.auth_type) {
 319                 case WLAN_AUTH_OPEN:
 320                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 321
 322                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
 323                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 324                                                  wpa_s->current_ssid);
 325                         return;
 326
 327                 case WLAN_AUTH_SHARED_KEY:
 328                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
 329
 330                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
 331                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 332                                                  wpa_s->current_ssid);
 333                         return;
 334
 335                 default:
 336                         return;
 337                 }
 338         }
 339
 340 #ifdef CONFIG_IEEE80211R
 341         if (data->auth.auth_type == WLAN_AUTH_FT) {
 342                 union wpa_event_data edata;
 343                 os_memset(&edata, 0, sizeof(edata));
 344                 edata.ft_ies.ies = data->auth.ies;
 345                 edata.ft_ies.ies_len = data->auth.ies_len;
 346                 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
 347                 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
 348         }
 349 #endif /* CONFIG_IEEE80211R */
 350
 351         sme_associate(wpa_s, ssid->mode, data->auth.peer,
 352                       data->auth.auth_type);
 353 }
 354
 355
 356 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
 357                    const u8 *bssid, u16 auth_type)
 358 {
 359         struct wpa_driver_associate_params params;
 360         struct ieee802_11_elems elems;
 361
 362         os_memset(&params, 0, sizeof(params));
 363         params.bssid = bssid;
 364         params.ssid = wpa_s->sme.ssid;
 365         params.ssid_len = wpa_s->sme.ssid_len;
 366         params.freq = wpa_s->sme.freq;
 367         params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
 368                 wpa_s->sme.assoc_req_ie : NULL;
 369         params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
 370         params.pairwise_suite = cipher_suite2driver(wpa_s->pairwise_cipher);
 371         params.group_suite = cipher_suite2driver(wpa_s->group_cipher);
 372 #ifdef CONFIG_IEEE80211R
 373         if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
 374                 params.wpa_ie = wpa_s->sme.ft_ies;
 375                 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
 376         }
 377 #endif /* CONFIG_IEEE80211R */
 378         params.mode = mode;
 379         params.mgmt_frame_protection = wpa_s->sme.mfp;
 380         if (wpa_s->sme.prev_bssid_set)
 381                 params.prev_bssid = wpa_s->sme.prev_bssid;
 382
 383         wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
 384                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 385                 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
 386                 params.freq);
 387
 388         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
 389
 390         if (params.wpa_ie == NULL ||
 391             ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
 392             < 0) {
 393                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
 394                 os_memset(&elems, 0, sizeof(elems));
 395         }
 396         if (elems.rsn_ie) {
 397                 params.wpa_proto = WPA_PROTO_RSN;
 398                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
 399                                         elems.rsn_ie_len + 2);
 400         } else if (elems.wpa_ie) {
 401                 params.wpa_proto = WPA_PROTO_WPA;
 402                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
 403                                         elems.wpa_ie_len + 2);
 404         } else
 405                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 406         if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
 407                 params.p2p = 1;
 408
 409         if (wpa_s->parent->set_sta_uapsd)
 410                 params.uapsd = wpa_s->parent->sta_uapsd;
 411         else
 412                 params.uapsd = -1;
 413
 414         if (wpa_drv_associate(wpa_s, &params) < 0) {
 415                 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
 416                         "driver failed");
 417                 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 418                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 419                 return;
 420         }
 421
 422         eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
 423                                NULL);
 424 }
 425
 426
 427 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
 428                       const u8 *ies, size_t ies_len)
 429 {
 430         if (md == NULL || ies == NULL) {
 431                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
 432                 os_free(wpa_s->sme.ft_ies);
 433                 wpa_s->sme.ft_ies = NULL;
 434                 wpa_s->sme.ft_ies_len = 0;
 435                 wpa_s->sme.ft_used = 0;
 436                 return 0;
 437         }
 438
 439         os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
 440         wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
 441         os_free(wpa_s->sme.ft_ies);
 442         wpa_s->sme.ft_ies = os_malloc(ies_len);
 443         if (wpa_s->sme.ft_ies == NULL)
 444                 return -1;
 445         os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
 446         wpa_s->sme.ft_ies_len = ies_len;
 447         return 0;
 448 }
 449
 450
 451 static void sme_deauth(struct wpa_supplicant *wpa_s)
 452 {
 453         int bssid_changed;
 454
 455         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 456
 457         if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
 458                                    WLAN_REASON_DEAUTH_LEAVING) < 0) {
 459                 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
 460                         "failed");
 461         }
 462         wpa_s->sme.prev_bssid_set = 0;
 463
 464         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 465         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 466         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 467         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 468         if (bssid_changed)
 469                 wpas_notify_bssid_changed(wpa_s);
 470 }
 471
 472
 473 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
 474                             union wpa_event_data *data)
 475 {
 476         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
 477                 "status code %d", MAC2STR(wpa_s->pending_bssid),
 478                 data->assoc_reject.status_code);
 479
 480         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 481
 482         /*
 483          * For now, unconditionally terminate the previous authentication. In
 484          * theory, this should not be needed, but mac80211 gets quite confused
 485          * if the authentication is left pending.. Some roaming cases might
 486          * benefit from using the previous authentication, so this could be
 487          * optimized in the future.
 488          */
 489         sme_deauth(wpa_s);
 490 }
 491
 492
 493 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
 494                               union wpa_event_data *data)
 495 {
 496         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
 497         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 498 }
 499
 500
 501 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
 502                                union wpa_event_data *data)
 503 {
 504         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
 505         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 506         wpa_supplicant_mark_disassoc(wpa_s);
 507 }
 508
 509
 510 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
 511                         union wpa_event_data *data)
 512 {
 513         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
 514         if (wpa_s->sme.prev_bssid_set &&
 515             !(wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)) {
 516                 /*
 517                  * cfg80211/mac80211 can get into somewhat confused state if
 518                  * the AP only disassociates us and leaves us in authenticated
 519                  * state. For now, force the state to be cleared to avoid
 520                  * confusing errors if we try to associate with the AP again.
 521                  */
 522                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
 523                         "driver state");
 524                 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
 525                                        WLAN_REASON_DEAUTH_LEAVING);
 526         }
 527 }
 528
 529
 530 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
 531 {
 532         struct wpa_supplicant *wpa_s = eloop_ctx;
 533         if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
 534                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
 535                 sme_deauth(wpa_s);
 536         }
 537 }
 538
 539
 540 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
 541 {
 542         struct wpa_supplicant *wpa_s = eloop_ctx;
 543         if (wpa_s->wpa_state == WPA_ASSOCIATING) {
 544                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
 545                 sme_deauth(wpa_s);
 546         }
 547 }
 548
 549
 550 void sme_state_changed(struct wpa_supplicant *wpa_s)
 551 {
 552         /* Make sure timers are cleaned up appropriately. */
 553         if (wpa_s->wpa_state != WPA_ASSOCIATING)
 554                 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 555         if (wpa_s->wpa_state != WPA_AUTHENTICATING)
 556                 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 557 }
 558
 559
 560 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
 561                                        const u8 *prev_pending_bssid)
 562 {
 563         /*
 564          * mac80211-workaround to force deauth on failed auth cmd,
 565          * requires us to remain in authenticating state to allow the
 566          * second authentication attempt to be continued properly.
 567          */
 568         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
 569                 "to proceed after disconnection event");
 570         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 571         os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
 572
 573         /*
 574          * Re-arm authentication timer in case auth fails for whatever reason.
 575          */
 576         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 577         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 578                                NULL);
 579 }
 580
 581
 582 void sme_deinit(struct wpa_supplicant *wpa_s)
 583 {
 584         os_free(wpa_s->sme.ft_ies);
 585         wpa_s->sme.ft_ies = NULL;
 586         wpa_s->sme.ft_ies_len = 0;
 587 #ifdef CONFIG_IEEE80211W
 588         sme_stop_sa_query(wpa_s);
 589 #endif /* CONFIG_IEEE80211W */
 590
 591         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 592         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 593 }
 594
 595
 596 #ifdef CONFIG_IEEE80211W
 597
 598 static const unsigned int sa_query_max_timeout = 1000;
 599 static const unsigned int sa_query_retry_timeout = 201;
 600
 601 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
 602 {
 603         u32 tu;
 604         struct os_time now, passed;
 605         os_get_time(&now);
 606         os_time_sub(&now, &wpa_s->sme.sa_query_start, &passed);
 607         tu = (passed.sec * 1000000 + passed.usec) / 1024;
 608         if (sa_query_max_timeout < tu) {
 609                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
 610                 sme_stop_sa_query(wpa_s);
 611                 wpa_supplicant_deauthenticate(
 612                         wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
 613                 return 1;
 614         }
 615
 616         return 0;
 617 }
 618
 619
 620 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
 621                                   const u8 *trans_id)
 622 {
 623         u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
 624         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
 625                 MACSTR, MAC2STR(wpa_s->bssid));
 626         wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
 627                     trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 628         req[0] = WLAN_ACTION_SA_QUERY;
 629         req[1] = WLAN_SA_QUERY_REQUEST;
 630         os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 631         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
 632                                 wpa_s->own_addr, wpa_s->bssid,
 633                                 req, sizeof(req)) < 0)
 634                 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
 635                         "Request");
 636 }
 637
 638
 639 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
 640 {
 641         struct wpa_supplicant *wpa_s = eloop_ctx;
 642         unsigned int timeout, sec, usec;
 643         u8 *trans_id, *nbuf;
 644
 645         if (wpa_s->sme.sa_query_count > 0 &&
 646             sme_check_sa_query_timeout(wpa_s))
 647                 return;
 648
 649         nbuf = os_realloc(wpa_s->sme.sa_query_trans_id,
 650                           (wpa_s->sme.sa_query_count + 1) *
 651                           WLAN_SA_QUERY_TR_ID_LEN);
 652         if (nbuf == NULL)
 653                 return;
 654         if (wpa_s->sme.sa_query_count == 0) {
 655                 /* Starting a new SA Query procedure */
 656                 os_get_time(&wpa_s->sme.sa_query_start);
 657         }
 658         trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
 659         wpa_s->sme.sa_query_trans_id = nbuf;
 660         wpa_s->sme.sa_query_count++;
 661
 662         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 663
 664         timeout = sa_query_retry_timeout;
 665         sec = ((timeout / 1000) * 1024) / 1000;
 666         usec = (timeout % 1000) * 1024;
 667         eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
 668
 669         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
 670                 wpa_s->sme.sa_query_count);
 671
 672         sme_send_sa_query_req(wpa_s, trans_id);
 673 }
 674
 675
 676 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
 677 {
 678         sme_sa_query_timer(wpa_s, NULL);
 679 }
 680
 681
 682 void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
 683 {
 684         eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
 685         os_free(wpa_s->sme.sa_query_trans_id);
 686         wpa_s->sme.sa_query_trans_id = NULL;
 687         wpa_s->sme.sa_query_count = 0;
 688 }
 689
 690
 691 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
 692                                  const u8 *da, u16 reason_code)
 693 {
 694         struct wpa_ssid *ssid;
 695
 696         if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME))
 697                 return;
 698         if (wpa_s->wpa_state != WPA_COMPLETED)
 699                 return;
 700         ssid = wpa_s->current_ssid;
 701         if (ssid == NULL || ssid->ieee80211w == 0)
 702                 return;
 703         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
 704                 return;
 705         if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
 706             reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
 707                 return;
 708         if (wpa_s->sme.sa_query_count > 0)
 709                 return;
 710
 711         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
 712                 "possible AP/STA state mismatch - trigger SA Query");
 713         sme_start_sa_query(wpa_s);
 714 }
 715
 716
 717 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
 718                      const u8 *data, size_t len)
 719 {
 720         int i;
 721
 722         if (wpa_s->sme.sa_query_trans_id == NULL ||
 723             len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
 724             data[0] != WLAN_SA_QUERY_RESPONSE)
 725                 return;
 726         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
 727                 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
 728
 729         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
 730                 return;
 731
 732         for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
 733                 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
 734                               i * WLAN_SA_QUERY_TR_ID_LEN,
 735                               data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
 736                         break;
 737         }
 738
 739         if (i >= wpa_s->sme.sa_query_count) {
 740                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
 741                         "transaction identifier found");
 742                 return;
 743         }
 744
 745         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
 746                 "from " MACSTR, MAC2STR(sa));
 747         sme_stop_sa_query(wpa_s);
 748 }
 749
 750 #endif /* CONFIG_IEEE80211W */