src/ap/sta_info.c

   1 /*
   2  * hostapd / Station table
   3  * Copyright (c) 2002-2013, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "utils/includes.h"
  10
  11 #include "utils/common.h"
  12 #include "utils/eloop.h"
  13 #include "common/ieee802_11_defs.h"
  14 #include "common/wpa_ctrl.h"
  15 #include "common/sae.h"
  16 #include "radius/radius.h"
  17 #include "radius/radius_client.h"
  18 #include "p2p/p2p.h"
  19 #include "hostapd.h"
  20 #include "accounting.h"
  21 #include "ieee802_1x.h"
  22 #include "ieee802_11.h"
  23 #include "ieee802_11_auth.h"
  24 #include "wpa_auth.h"
  25 #include "preauth_auth.h"
  26 #include "ap_config.h"
  27 #include "beacon.h"
  28 #include "ap_mlme.h"
  29 #include "vlan_init.h"
  30 #include "p2p_hostapd.h"
  31 #include "ap_drv_ops.h"
  32 #include "gas_serv.h"
  33 #include "wnm_ap.h"
  34 #include "sta_info.h"
  35
  36 static void ap_sta_remove_in_other_bss(struct hostapd_data *hapd,
  37                                        struct sta_info *sta);
  38 static void ap_handle_session_timer(void *eloop_ctx, void *timeout_ctx);
  39 static void ap_handle_session_warning_timer(void *eloop_ctx, void *timeout_ctx);
  40 static void ap_sta_deauth_cb_timeout(void *eloop_ctx, void *timeout_ctx);
  41 static void ap_sta_disassoc_cb_timeout(void *eloop_ctx, void *timeout_ctx);
  42 #ifdef CONFIG_IEEE80211W
  43 static void ap_sa_query_timer(void *eloop_ctx, void *timeout_ctx);
  44 #endif /* CONFIG_IEEE80211W */
  45 static int ap_sta_remove(struct hostapd_data *hapd, struct sta_info *sta);
  46
  47 int ap_for_each_sta(struct hostapd_data *hapd,
  48                     int (*cb)(struct hostapd_data *hapd, struct sta_info *sta,
  49                               void *ctx),
  50                     void *ctx)
  51 {
  52         struct sta_info *sta;
  53
  54         for (sta = hapd->sta_list; sta; sta = sta->next) {
  55                 if (cb(hapd, sta, ctx))
  56                         return 1;
  57         }
  58
  59         return 0;
  60 }
  61
  62
  63 struct sta_info * ap_get_sta(struct hostapd_data *hapd, const u8 *sta)
  64 {
  65         struct sta_info *s;
  66
  67         s = hapd->sta_hash[STA_HASH(sta)];
  68         while (s != NULL && os_memcmp(s->addr, sta, 6) != 0)
  69                 s = s->hnext;
  70         return s;
  71 }
  72
  73
  74 #ifdef CONFIG_P2P
  75 struct sta_info * ap_get_sta_p2p(struct hostapd_data *hapd, const u8 *addr)
  76 {
  77         struct sta_info *sta;
  78
  79         for (sta = hapd->sta_list; sta; sta = sta->next) {
  80                 const u8 *p2p_dev_addr;
  81
  82                 if (sta->p2p_ie == NULL)
  83                         continue;
  84
  85                 p2p_dev_addr = p2p_get_go_dev_addr(sta->p2p_ie);
  86                 if (p2p_dev_addr == NULL)
  87                         continue;
  88
  89                 if (os_memcmp(p2p_dev_addr, addr, ETH_ALEN) == 0)
  90                         return sta;
  91         }
  92
  93         return NULL;
  94 }
  95 #endif /* CONFIG_P2P */
  96
  97
  98 static void ap_sta_list_del(struct hostapd_data *hapd, struct sta_info *sta)
  99 {
 100         struct sta_info *tmp;
 101
 102         if (hapd->sta_list == sta) {
 103                 hapd->sta_list = sta->next;
 104                 return;
 105         }
 106
 107         tmp = hapd->sta_list;
 108         while (tmp != NULL && tmp->next != sta)
 109                 tmp = tmp->next;
 110         if (tmp == NULL) {
 111                 wpa_printf(MSG_DEBUG, "Could not remove STA " MACSTR " from "
 112                            "list.", MAC2STR(sta->addr));
 113         } else
 114                 tmp->next = sta->next;
 115 }
 116
 117
 118 void ap_sta_hash_add(struct hostapd_data *hapd, struct sta_info *sta)
 119 {
 120         sta->hnext = hapd->sta_hash[STA_HASH(sta->addr)];
 121         hapd->sta_hash[STA_HASH(sta->addr)] = sta;
 122 }
 123
 124
 125 static void ap_sta_hash_del(struct hostapd_data *hapd, struct sta_info *sta)
 126 {
 127         struct sta_info *s;
 128
 129         s = hapd->sta_hash[STA_HASH(sta->addr)];
 130         if (s == NULL) return;
 131         if (os_memcmp(s->addr, sta->addr, 6) == 0) {
 132                 hapd->sta_hash[STA_HASH(sta->addr)] = s->hnext;
 133                 return;
 134         }
 135
 136         while (s->hnext != NULL &&
 137                os_memcmp(s->hnext->addr, sta->addr, ETH_ALEN) != 0)
 138                 s = s->hnext;
 139         if (s->hnext != NULL)
 140                 s->hnext = s->hnext->hnext;
 141         else
 142                 wpa_printf(MSG_DEBUG, "AP: could not remove STA " MACSTR
 143                            " from hash table", MAC2STR(sta->addr));
 144 }
 145
 146
 147 void ap_free_sta(struct hostapd_data *hapd, struct sta_info *sta)
 148 {
 149         int set_beacon = 0;
 150
 151         accounting_sta_stop(hapd, sta);
 152
 153         /* just in case */
 154         ap_sta_set_authorized(hapd, sta, 0);
 155
 156         if (sta->flags & WLAN_STA_WDS)
 157                 hostapd_set_wds_sta(hapd, NULL, sta->addr, sta->aid, 0);
 158
 159         if (!hapd->iface->driver_ap_teardown &&
 160             !(sta->flags & WLAN_STA_PREAUTH))
 161                 hostapd_drv_sta_remove(hapd, sta->addr);
 162
 163         ap_sta_hash_del(hapd, sta);
 164         ap_sta_list_del(hapd, sta);
 165
 166         if (sta->aid > 0)
 167                 hapd->sta_aid[(sta->aid - 1) / 32] &=
 168                         ~BIT((sta->aid - 1) % 32);
 169
 170         hapd->num_sta--;
 171         if (sta->nonerp_set) {
 172                 sta->nonerp_set = 0;
 173                 hapd->iface->num_sta_non_erp--;
 174                 if (hapd->iface->num_sta_non_erp == 0)
 175                         set_beacon++;
 176         }
 177
 178         if (sta->no_short_slot_time_set) {
 179                 sta->no_short_slot_time_set = 0;
 180                 hapd->iface->num_sta_no_short_slot_time--;
 181                 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
 182                     && hapd->iface->num_sta_no_short_slot_time == 0)
 183                         set_beacon++;
 184         }
 185
 186         if (sta->no_short_preamble_set) {
 187                 sta->no_short_preamble_set = 0;
 188                 hapd->iface->num_sta_no_short_preamble--;
 189                 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
 190                     && hapd->iface->num_sta_no_short_preamble == 0)
 191                         set_beacon++;
 192         }
 193
 194         if (sta->no_ht_gf_set) {
 195                 sta->no_ht_gf_set = 0;
 196                 hapd->iface->num_sta_ht_no_gf--;
 197         }
 198
 199         if (sta->no_ht_set) {
 200                 sta->no_ht_set = 0;
 201                 hapd->iface->num_sta_no_ht--;
 202         }
 203
 204         if (sta->ht_20mhz_set) {
 205                 sta->ht_20mhz_set = 0;
 206                 hapd->iface->num_sta_ht_20mhz--;
 207         }
 208
 209 #ifdef CONFIG_IEEE80211N
 210         ht40_intolerant_remove(hapd->iface, sta);
 211 #endif /* CONFIG_IEEE80211N */
 212
 213 #ifdef CONFIG_P2P
 214         if (sta->no_p2p_set) {
 215                 sta->no_p2p_set = 0;
 216                 hapd->num_sta_no_p2p--;
 217                 if (hapd->num_sta_no_p2p == 0)
 218                         hostapd_p2p_non_p2p_sta_disconnected(hapd);
 219         }
 220 #endif /* CONFIG_P2P */
 221
 222 #if defined(NEED_AP_MLME) && defined(CONFIG_IEEE80211N)
 223         if (hostapd_ht_operation_update(hapd->iface) > 0)
 224                 set_beacon++;
 225 #endif /* NEED_AP_MLME && CONFIG_IEEE80211N */
 226
 227         if (set_beacon)
 228                 ieee802_11_set_beacons(hapd->iface);
 229
 230         wpa_printf(MSG_DEBUG, "%s: cancel ap_handle_timer for " MACSTR,
 231                    __func__, MAC2STR(sta->addr));
 232         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 233         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 234         eloop_cancel_timeout(ap_handle_session_warning_timer, hapd, sta);
 235         eloop_cancel_timeout(ap_sta_deauth_cb_timeout, hapd, sta);
 236         eloop_cancel_timeout(ap_sta_disassoc_cb_timeout, hapd, sta);
 237
 238         ieee802_1x_free_station(sta);
 239         wpa_auth_sta_deinit(sta->wpa_sm);
 240         rsn_preauth_free_station(hapd, sta);
 241 #ifndef CONFIG_NO_RADIUS
 242         if (hapd->radius)
 243                 radius_client_flush_auth(hapd->radius, sta->addr);
 244 #endif /* CONFIG_NO_RADIUS */
 245
 246         os_free(sta->challenge);
 247
 248 #ifdef CONFIG_IEEE80211W
 249         os_free(sta->sa_query_trans_id);
 250         eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 251 #endif /* CONFIG_IEEE80211W */
 252
 253 #ifdef CONFIG_P2P
 254         p2p_group_notif_disassoc(hapd->p2p_group, sta->addr);
 255 #endif /* CONFIG_P2P */
 256
 257 #ifdef CONFIG_INTERWORKING
 258         if (sta->gas_dialog) {
 259                 int i;
 260                 for (i = 0; i < GAS_DIALOG_MAX; i++)
 261                         gas_serv_dialog_clear(&sta->gas_dialog[i]);
 262                 os_free(sta->gas_dialog);
 263         }
 264 #endif /* CONFIG_INTERWORKING */
 265
 266         wpabuf_free(sta->wps_ie);
 267         wpabuf_free(sta->p2p_ie);
 268         wpabuf_free(sta->hs20_ie);
 269
 270         os_free(sta->ht_capabilities);
 271         os_free(sta->vht_capabilities);
 272         hostapd_free_psk_list(sta->psk);
 273         os_free(sta->identity);
 274         os_free(sta->radius_cui);
 275         os_free(sta->remediation_url);
 276         wpabuf_free(sta->hs20_deauth_req);
 277         os_free(sta->hs20_session_info_url);
 278
 279 #ifdef CONFIG_SAE
 280         sae_clear_data(sta->sae);
 281         os_free(sta->sae);
 282 #endif /* CONFIG_SAE */
 283
 284         os_free(sta);
 285 }
 286
 287
 288 void hostapd_free_stas(struct hostapd_data *hapd)
 289 {
 290         struct sta_info *sta, *prev;
 291
 292         sta = hapd->sta_list;
 293
 294         while (sta) {
 295                 prev = sta;
 296                 if (sta->flags & WLAN_STA_AUTH) {
 297                         mlme_deauthenticate_indication(
 298                                 hapd, sta, WLAN_REASON_UNSPECIFIED);
 299                 }
 300                 sta = sta->next;
 301                 wpa_printf(MSG_DEBUG, "Removing station " MACSTR,
 302                            MAC2STR(prev->addr));
 303                 ap_free_sta(hapd, prev);
 304         }
 305 }
 306
 307
 308 /**
 309  * ap_handle_timer - Per STA timer handler
 310  * @eloop_ctx: struct hostapd_data *
 311  * @timeout_ctx: struct sta_info *
 312  *
 313  * This function is called to check station activity and to remove inactive
 314  * stations.
 315  */
 316 void ap_handle_timer(void *eloop_ctx, void *timeout_ctx)
 317 {
 318         struct hostapd_data *hapd = eloop_ctx;
 319         struct sta_info *sta = timeout_ctx;
 320         unsigned long next_time = 0;
 321         int reason;
 322
 323         wpa_printf(MSG_DEBUG, "%s: " MACSTR " flags=0x%x timeout_next=%d",
 324                    __func__, MAC2STR(sta->addr), sta->flags,
 325                    sta->timeout_next);
 326         if (sta->timeout_next == STA_REMOVE) {
 327                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 328                                HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 329                                "local deauth request");
 330                 ap_free_sta(hapd, sta);
 331                 return;
 332         }
 333
 334         if ((sta->flags & WLAN_STA_ASSOC) &&
 335             (sta->timeout_next == STA_NULLFUNC ||
 336              sta->timeout_next == STA_DISASSOC)) {
 337                 int inactive_sec;
 338                 /*
 339                  * Add random value to timeout so that we don't end up bouncing
 340                  * all stations at the same time if we have lots of associated
 341                  * stations that are idle (but keep re-associating).
 342                  */
 343                 int fuzz = os_random() % 20;
 344                 inactive_sec = hostapd_drv_get_inact_sec(hapd, sta->addr);
 345                 if (inactive_sec == -1) {
 346                         wpa_msg(hapd->msg_ctx, MSG_DEBUG,
 347                                 "Check inactivity: Could not "
 348                                 "get station info from kernel driver for "
 349                                 MACSTR, MAC2STR(sta->addr));
 350                         /*
 351                          * The driver may not support this functionality.
 352                          * Anyway, try again after the next inactivity timeout,
 353                          * but do not disconnect the station now.
 354                          */
 355                         next_time = hapd->conf->ap_max_inactivity + fuzz;
 356                 } else if (inactive_sec < hapd->conf->ap_max_inactivity &&
 357                            sta->flags & WLAN_STA_ASSOC) {
 358                         /* station activity detected; reset timeout state */
 359                         wpa_msg(hapd->msg_ctx, MSG_DEBUG,
 360                                 "Station " MACSTR " has been active %is ago",
 361                                 MAC2STR(sta->addr), inactive_sec);
 362                         sta->timeout_next = STA_NULLFUNC;
 363                         next_time = hapd->conf->ap_max_inactivity + fuzz -
 364                                 inactive_sec;
 365                 } else {
 366                         wpa_msg(hapd->msg_ctx, MSG_DEBUG,
 367                                 "Station " MACSTR " has been "
 368                                 "inactive too long: %d sec, max allowed: %d",
 369                                 MAC2STR(sta->addr), inactive_sec,
 370                                 hapd->conf->ap_max_inactivity);
 371
 372                         if (hapd->conf->skip_inactivity_poll)
 373                                 sta->timeout_next = STA_DISASSOC;
 374                 }
 375         }
 376
 377         if ((sta->flags & WLAN_STA_ASSOC) &&
 378             sta->timeout_next == STA_DISASSOC &&
 379             !(sta->flags & WLAN_STA_PENDING_POLL) &&
 380             !hapd->conf->skip_inactivity_poll) {
 381                 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "Station " MACSTR
 382                         " has ACKed data poll", MAC2STR(sta->addr));
 383                 /* data nullfunc frame poll did not produce TX errors; assume
 384                  * station ACKed it */
 385                 sta->timeout_next = STA_NULLFUNC;
 386                 next_time = hapd->conf->ap_max_inactivity;
 387         }
 388
 389         if (next_time) {
 390                 wpa_printf(MSG_DEBUG, "%s: register ap_handle_timer timeout "
 391                            "for " MACSTR " (%lu seconds)",
 392                            __func__, MAC2STR(sta->addr), next_time);
 393                 eloop_register_timeout(next_time, 0, ap_handle_timer, hapd,
 394                                        sta);
 395                 return;
 396         }
 397
 398         if (sta->timeout_next == STA_NULLFUNC &&
 399             (sta->flags & WLAN_STA_ASSOC)) {
 400                 wpa_printf(MSG_DEBUG, "  Polling STA");
 401                 sta->flags |= WLAN_STA_PENDING_POLL;
 402                 hostapd_drv_poll_client(hapd, hapd->own_addr, sta->addr,
 403                                         sta->flags & WLAN_STA_WMM);
 404         } else if (sta->timeout_next != STA_REMOVE) {
 405                 int deauth = sta->timeout_next == STA_DEAUTH;
 406
 407                 wpa_dbg(hapd->msg_ctx, MSG_DEBUG,
 408                         "Timeout, sending %s info to STA " MACSTR,
 409                         deauth ? "deauthentication" : "disassociation",
 410                         MAC2STR(sta->addr));
 411
 412                 if (deauth) {
 413                         hostapd_drv_sta_deauth(
 414                                 hapd, sta->addr,
 415                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
 416                 } else {
 417                         reason = (sta->timeout_next == STA_DISASSOC) ?
 418                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY :
 419                                 WLAN_REASON_PREV_AUTH_NOT_VALID;
 420
 421                         hostapd_drv_sta_disassoc(hapd, sta->addr, reason);
 422                 }
 423         }
 424
 425         switch (sta->timeout_next) {
 426         case STA_NULLFUNC:
 427                 sta->timeout_next = STA_DISASSOC;
 428                 wpa_printf(MSG_DEBUG, "%s: register ap_handle_timer timeout "
 429                            "for " MACSTR " (%d seconds - AP_DISASSOC_DELAY)",
 430                            __func__, MAC2STR(sta->addr), AP_DISASSOC_DELAY);
 431                 eloop_register_timeout(AP_DISASSOC_DELAY, 0, ap_handle_timer,
 432                                        hapd, sta);
 433                 break;
 434         case STA_DISASSOC:
 435         case STA_DISASSOC_FROM_CLI:
 436                 ap_sta_set_authorized(hapd, sta, 0);
 437                 sta->flags &= ~WLAN_STA_ASSOC;
 438                 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 439                 if (!sta->acct_terminate_cause)
 440                         sta->acct_terminate_cause =
 441                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
 442                 accounting_sta_stop(hapd, sta);
 443                 ieee802_1x_free_station(sta);
 444                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 445                                HOSTAPD_LEVEL_INFO, "disassociated due to "
 446                                "inactivity");
 447                 reason = (sta->timeout_next == STA_DISASSOC) ?
 448                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY :
 449                         WLAN_REASON_PREV_AUTH_NOT_VALID;
 450                 sta->timeout_next = STA_DEAUTH;
 451                 wpa_printf(MSG_DEBUG, "%s: register ap_handle_timer timeout "
 452                            "for " MACSTR " (%d seconds - AP_DEAUTH_DELAY)",
 453                            __func__, MAC2STR(sta->addr), AP_DEAUTH_DELAY);
 454                 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer,
 455                                        hapd, sta);
 456                 mlme_disassociate_indication(hapd, sta, reason);
 457                 break;
 458         case STA_DEAUTH:
 459         case STA_REMOVE:
 460                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 461                                HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 462                                "inactivity (timer DEAUTH/REMOVE)");
 463                 if (!sta->acct_terminate_cause)
 464                         sta->acct_terminate_cause =
 465                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
 466                 mlme_deauthenticate_indication(
 467                         hapd, sta,
 468                         WLAN_REASON_PREV_AUTH_NOT_VALID);
 469                 ap_free_sta(hapd, sta);
 470                 break;
 471         }
 472 }
 473
 474
 475 static void ap_handle_session_timer(void *eloop_ctx, void *timeout_ctx)
 476 {
 477         struct hostapd_data *hapd = eloop_ctx;
 478         struct sta_info *sta = timeout_ctx;
 479
 480         if (!(sta->flags & WLAN_STA_AUTH)) {
 481                 if (sta->flags & WLAN_STA_GAS) {
 482                         wpa_printf(MSG_DEBUG, "GAS: Remove temporary STA "
 483                                    "entry " MACSTR, MAC2STR(sta->addr));
 484                         ap_free_sta(hapd, sta);
 485                 }
 486                 return;
 487         }
 488
 489         hostapd_drv_sta_deauth(hapd, sta->addr,
 490                                WLAN_REASON_PREV_AUTH_NOT_VALID);
 491         mlme_deauthenticate_indication(hapd, sta,
 492                                        WLAN_REASON_PREV_AUTH_NOT_VALID);
 493         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 494                        HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 495                        "session timeout");
 496         sta->acct_terminate_cause =
 497                 RADIUS_ACCT_TERMINATE_CAUSE_SESSION_TIMEOUT;
 498         ap_free_sta(hapd, sta);
 499 }
 500
 501
 502 void ap_sta_replenish_timeout(struct hostapd_data *hapd, struct sta_info *sta,
 503                               u32 session_timeout)
 504 {
 505         if (eloop_replenish_timeout(session_timeout, 0,
 506                                     ap_handle_session_timer, hapd, sta) == 1) {
 507                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 508                                HOSTAPD_LEVEL_DEBUG, "setting session timeout "
 509                                "to %d seconds", session_timeout);
 510         }
 511 }
 512
 513
 514 void ap_sta_session_timeout(struct hostapd_data *hapd, struct sta_info *sta,
 515                             u32 session_timeout)
 516 {
 517         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 518                        HOSTAPD_LEVEL_DEBUG, "setting session timeout to %d "
 519                        "seconds", session_timeout);
 520         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 521         eloop_register_timeout(session_timeout, 0, ap_handle_session_timer,
 522                                hapd, sta);
 523 }
 524
 525
 526 void ap_sta_no_session_timeout(struct hostapd_data *hapd, struct sta_info *sta)
 527 {
 528         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 529 }
 530
 531
 532 static void ap_handle_session_warning_timer(void *eloop_ctx, void *timeout_ctx)
 533 {
 534 #ifdef CONFIG_WNM
 535         struct hostapd_data *hapd = eloop_ctx;
 536         struct sta_info *sta = timeout_ctx;
 537
 538         wpa_printf(MSG_DEBUG, "WNM: Session warning time reached for " MACSTR,
 539                    MAC2STR(sta->addr));
 540         if (sta->hs20_session_info_url == NULL)
 541                 return;
 542
 543         wnm_send_ess_disassoc_imminent(hapd, sta, sta->hs20_session_info_url,
 544                                        sta->hs20_disassoc_timer);
 545 #endif /* CONFIG_WNM */
 546 }
 547
 548
 549 void ap_sta_session_warning_timeout(struct hostapd_data *hapd,
 550                                     struct sta_info *sta, int warning_time)
 551 {
 552         eloop_cancel_timeout(ap_handle_session_warning_timer, hapd, sta);
 553         eloop_register_timeout(warning_time, 0, ap_handle_session_warning_timer,
 554                                hapd, sta);
 555 }
 556
 557
 558 struct sta_info * ap_sta_add(struct hostapd_data *hapd, const u8 *addr)
 559 {
 560         struct sta_info *sta;
 561
 562         sta = ap_get_sta(hapd, addr);
 563         if (sta)
 564                 return sta;
 565
 566         wpa_printf(MSG_DEBUG, "  New STA");
 567         if (hapd->num_sta >= hapd->conf->max_num_sta) {
 568                 /* FIX: might try to remove some old STAs first? */
 569                 wpa_printf(MSG_DEBUG, "no more room for new STAs (%d/%d)",
 570                            hapd->num_sta, hapd->conf->max_num_sta);
 571                 return NULL;
 572         }
 573
 574         sta = os_zalloc(sizeof(struct sta_info));
 575         if (sta == NULL) {
 576                 wpa_printf(MSG_ERROR, "malloc failed");
 577                 return NULL;
 578         }
 579         sta->acct_interim_interval = hapd->conf->acct_interim_interval;
 580         accounting_sta_get_id(hapd, sta);
 581
 582         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_INACTIVITY_TIMER)) {
 583                 wpa_printf(MSG_DEBUG, "%s: register ap_handle_timer timeout "
 584                            "for " MACSTR " (%d seconds - ap_max_inactivity)",
 585                            __func__, MAC2STR(addr),
 586                            hapd->conf->ap_max_inactivity);
 587                 eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
 588                                        ap_handle_timer, hapd, sta);
 589         }
 590
 591         /* initialize STA info data */
 592         os_memcpy(sta->addr, addr, ETH_ALEN);
 593         sta->next = hapd->sta_list;
 594         hapd->sta_list = sta;
 595         hapd->num_sta++;
 596         ap_sta_hash_add(hapd, sta);
 597         sta->ssid = &hapd->conf->ssid;
 598         ap_sta_remove_in_other_bss(hapd, sta);
 599
 600         return sta;
 601 }
 602
 603
 604 static int ap_sta_remove(struct hostapd_data *hapd, struct sta_info *sta)
 605 {
 606         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 607
 608         wpa_printf(MSG_DEBUG, "Removing STA " MACSTR " from kernel driver",
 609                    MAC2STR(sta->addr));
 610         if (hostapd_drv_sta_remove(hapd, sta->addr) &&
 611             sta->flags & WLAN_STA_ASSOC) {
 612                 wpa_printf(MSG_DEBUG, "Could not remove station " MACSTR
 613                            " from kernel driver.", MAC2STR(sta->addr));
 614                 return -1;
 615         }
 616         return 0;
 617 }
 618
 619
 620 static void ap_sta_remove_in_other_bss(struct hostapd_data *hapd,
 621                                        struct sta_info *sta)
 622 {
 623         struct hostapd_iface *iface = hapd->iface;
 624         size_t i;
 625
 626         for (i = 0; i < iface->num_bss; i++) {
 627                 struct hostapd_data *bss = iface->bss[i];
 628                 struct sta_info *sta2;
 629                 /* bss should always be set during operation, but it may be
 630                  * NULL during reconfiguration. Assume the STA is not
 631                  * associated to another BSS in that case to avoid NULL pointer
 632                  * dereferences. */
 633                 if (bss == hapd || bss == NULL)
 634                         continue;
 635                 sta2 = ap_get_sta(bss, sta->addr);
 636                 if (!sta2)
 637                         continue;
 638
 639                 ap_sta_disconnect(bss, sta2, sta2->addr,
 640                                   WLAN_REASON_PREV_AUTH_NOT_VALID);
 641         }
 642 }
 643
 644
 645 static void ap_sta_disassoc_cb_timeout(void *eloop_ctx, void *timeout_ctx)
 646 {
 647         struct hostapd_data *hapd = eloop_ctx;
 648         struct sta_info *sta = timeout_ctx;
 649
 650         ap_sta_remove(hapd, sta);
 651         mlme_disassociate_indication(hapd, sta, sta->disassoc_reason);
 652 }
 653
 654
 655 void ap_sta_disassociate(struct hostapd_data *hapd, struct sta_info *sta,
 656                          u16 reason)
 657 {
 658         wpa_printf(MSG_DEBUG, "%s: disassociate STA " MACSTR,
 659                    hapd->conf->iface, MAC2STR(sta->addr));
 660         sta->flags &= ~(WLAN_STA_ASSOC | WLAN_STA_ASSOC_REQ_OK);
 661         ap_sta_set_authorized(hapd, sta, 0);
 662         sta->timeout_next = STA_DEAUTH;
 663         wpa_printf(MSG_DEBUG, "%s: reschedule ap_handle_timer timeout "
 664                    "for " MACSTR " (%d seconds - "
 665                    "AP_MAX_INACTIVITY_AFTER_DISASSOC)",
 666                    __func__, MAC2STR(sta->addr),
 667                    AP_MAX_INACTIVITY_AFTER_DISASSOC);
 668         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 669         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DISASSOC, 0,
 670                                ap_handle_timer, hapd, sta);
 671         accounting_sta_stop(hapd, sta);
 672         ieee802_1x_free_station(sta);
 673
 674         sta->disassoc_reason = reason;
 675         sta->flags |= WLAN_STA_PENDING_DISASSOC_CB;
 676         eloop_cancel_timeout(ap_sta_disassoc_cb_timeout, hapd, sta);
 677         eloop_register_timeout(hapd->iface->drv_flags &
 678                                WPA_DRIVER_FLAGS_DEAUTH_TX_STATUS ? 2 : 0, 0,
 679                                ap_sta_disassoc_cb_timeout, hapd, sta);
 680 }
 681
 682
 683 static void ap_sta_deauth_cb_timeout(void *eloop_ctx, void *timeout_ctx)
 684 {
 685         struct hostapd_data *hapd = eloop_ctx;
 686         struct sta_info *sta = timeout_ctx;
 687
 688         ap_sta_remove(hapd, sta);
 689         mlme_deauthenticate_indication(hapd, sta, sta->deauth_reason);
 690 }
 691
 692
 693 void ap_sta_deauthenticate(struct hostapd_data *hapd, struct sta_info *sta,
 694                            u16 reason)
 695 {
 696         wpa_printf(MSG_DEBUG, "%s: deauthenticate STA " MACSTR,
 697                    hapd->conf->iface, MAC2STR(sta->addr));
 698         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
 699         ap_sta_set_authorized(hapd, sta, 0);
 700         sta->timeout_next = STA_REMOVE;
 701         wpa_printf(MSG_DEBUG, "%s: reschedule ap_handle_timer timeout "
 702                    "for " MACSTR " (%d seconds - "
 703                    "AP_MAX_INACTIVITY_AFTER_DEAUTH)",
 704                    __func__, MAC2STR(sta->addr),
 705                    AP_MAX_INACTIVITY_AFTER_DEAUTH);
 706         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 707         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DEAUTH, 0,
 708                                ap_handle_timer, hapd, sta);
 709         accounting_sta_stop(hapd, sta);
 710         ieee802_1x_free_station(sta);
 711
 712         sta->deauth_reason = reason;
 713         sta->flags |= WLAN_STA_PENDING_DEAUTH_CB;
 714         eloop_cancel_timeout(ap_sta_deauth_cb_timeout, hapd, sta);
 715         eloop_register_timeout(hapd->iface->drv_flags &
 716                                WPA_DRIVER_FLAGS_DEAUTH_TX_STATUS ? 2 : 0, 0,
 717                                ap_sta_deauth_cb_timeout, hapd, sta);
 718 }
 719
 720
 721 #ifdef CONFIG_WPS
 722 int ap_sta_wps_cancel(struct hostapd_data *hapd,
 723                       struct sta_info *sta, void *ctx)
 724 {
 725         if (sta && (sta->flags & WLAN_STA_WPS)) {
 726                 ap_sta_deauthenticate(hapd, sta,
 727                                       WLAN_REASON_PREV_AUTH_NOT_VALID);
 728                 wpa_printf(MSG_DEBUG, "WPS: %s: Deauth sta=" MACSTR,
 729                            __func__, MAC2STR(sta->addr));
 730                 return 1;
 731         }
 732
 733         return 0;
 734 }
 735 #endif /* CONFIG_WPS */
 736
 737
 738 int ap_sta_bind_vlan(struct hostapd_data *hapd, struct sta_info *sta,
 739                      int old_vlanid)
 740 {
 741 #ifndef CONFIG_NO_VLAN
 742         const char *iface;
 743         struct hostapd_vlan *vlan = NULL;
 744         int ret;
 745
 746         /*
 747          * Do not proceed furthur if the vlan id remains same. We do not want
 748          * duplicate dynamic vlan entries.
 749          */
 750         if (sta->vlan_id == old_vlanid)
 751                 return 0;
 752
 753         /*
 754          * During 1x reauth, if the vlan id changes, then remove the old id and
 755          * proceed furthur to add the new one.
 756          */
 757         if (old_vlanid > 0)
 758                 vlan_remove_dynamic(hapd, old_vlanid);
 759
 760         iface = hapd->conf->iface;
 761         if (sta->ssid->vlan[0])
 762                 iface = sta->ssid->vlan;
 763
 764         if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
 765                 sta->vlan_id = 0;
 766         else if (sta->vlan_id > 0) {
 767                 struct hostapd_vlan *wildcard_vlan = NULL;
 768                 vlan = hapd->conf->vlan;
 769                 while (vlan) {
 770                         if (vlan->vlan_id == sta->vlan_id)
 771                                 break;
 772                         if (vlan->vlan_id == VLAN_ID_WILDCARD)
 773                                 wildcard_vlan = vlan;
 774                         vlan = vlan->next;
 775                 }
 776                 if (!vlan)
 777                         vlan = wildcard_vlan;
 778                 if (vlan)
 779                         iface = vlan->ifname;
 780         }
 781
 782         if (sta->vlan_id > 0 && vlan == NULL) {
 783                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 784                                HOSTAPD_LEVEL_DEBUG, "could not find VLAN for "
 785                                "binding station to (vlan_id=%d)",
 786                                sta->vlan_id);
 787                 return -1;
 788         } else if (sta->vlan_id > 0 && vlan->vlan_id == VLAN_ID_WILDCARD) {
 789                 vlan = vlan_add_dynamic(hapd, vlan, sta->vlan_id);
 790                 if (vlan == NULL) {
 791                         hostapd_logger(hapd, sta->addr,
 792                                        HOSTAPD_MODULE_IEEE80211,
 793                                        HOSTAPD_LEVEL_DEBUG, "could not add "
 794                                        "dynamic VLAN interface for vlan_id=%d",
 795                                        sta->vlan_id);
 796                         return -1;
 797                 }
 798
 799                 iface = vlan->ifname;
 800                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 801                         hostapd_logger(hapd, sta->addr,
 802                                        HOSTAPD_MODULE_IEEE80211,
 803                                        HOSTAPD_LEVEL_DEBUG, "could not "
 804                                        "configure encryption for dynamic VLAN "
 805                                        "interface for vlan_id=%d",
 806                                        sta->vlan_id);
 807                 }
 808
 809                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 810                                HOSTAPD_LEVEL_DEBUG, "added new dynamic VLAN "
 811                                "interface '%s'", iface);
 812         } else if (vlan && vlan->vlan_id == sta->vlan_id) {
 813                 if (sta->vlan_id > 0) {
 814                         vlan->dynamic_vlan++;
 815                         hostapd_logger(hapd, sta->addr,
 816                                        HOSTAPD_MODULE_IEEE80211,
 817                                        HOSTAPD_LEVEL_DEBUG, "updated existing "
 818                                        "dynamic VLAN interface '%s'", iface);
 819                 }
 820
 821                 /*
 822                  * Update encryption configuration for statically generated
 823                  * VLAN interface. This is only used for static WEP
 824                  * configuration for the case where hostapd did not yet know
 825                  * which keys are to be used when the interface was added.
 826                  */
 827                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 828                         hostapd_logger(hapd, sta->addr,
 829                                        HOSTAPD_MODULE_IEEE80211,
 830                                        HOSTAPD_LEVEL_DEBUG, "could not "
 831                                        "configure encryption for VLAN "
 832                                        "interface for vlan_id=%d",
 833                                        sta->vlan_id);
 834                 }
 835         }
 836
 837         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 838                        HOSTAPD_LEVEL_DEBUG, "binding station to interface "
 839                        "'%s'", iface);
 840
 841         if (wpa_auth_sta_set_vlan(sta->wpa_sm, sta->vlan_id) < 0)
 842                 wpa_printf(MSG_INFO, "Failed to update VLAN-ID for WPA");
 843
 844         ret = hostapd_drv_set_sta_vlan(iface, hapd, sta->addr, sta->vlan_id);
 845         if (ret < 0) {
 846                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 847                                HOSTAPD_LEVEL_DEBUG, "could not bind the STA "
 848                                "entry to vlan_id=%d", sta->vlan_id);
 849         }
 850         return ret;
 851 #else /* CONFIG_NO_VLAN */
 852         return 0;
 853 #endif /* CONFIG_NO_VLAN */
 854 }
 855
 856
 857 #ifdef CONFIG_IEEE80211W
 858
 859 int ap_check_sa_query_timeout(struct hostapd_data *hapd, struct sta_info *sta)
 860 {
 861         u32 tu;
 862         struct os_reltime now, passed;
 863         os_get_reltime(&now);
 864         os_reltime_sub(&now, &sta->sa_query_start, &passed);
 865         tu = (passed.sec * 1000000 + passed.usec) / 1024;
 866         if (hapd->conf->assoc_sa_query_max_timeout < tu) {
 867                 hostapd_logger(hapd, sta->addr,
 868                                HOSTAPD_MODULE_IEEE80211,
 869                                HOSTAPD_LEVEL_DEBUG,
 870                                "association SA Query timed out");
 871                 sta->sa_query_timed_out = 1;
 872                 os_free(sta->sa_query_trans_id);
 873                 sta->sa_query_trans_id = NULL;
 874                 sta->sa_query_count = 0;
 875                 eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 876                 return 1;
 877         }
 878
 879         return 0;
 880 }
 881
 882
 883 static void ap_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
 884 {
 885         struct hostapd_data *hapd = eloop_ctx;
 886         struct sta_info *sta = timeout_ctx;
 887         unsigned int timeout, sec, usec;
 888         u8 *trans_id, *nbuf;
 889
 890         if (sta->sa_query_count > 0 &&
 891             ap_check_sa_query_timeout(hapd, sta))
 892                 return;
 893
 894         nbuf = os_realloc_array(sta->sa_query_trans_id,
 895                                 sta->sa_query_count + 1,
 896                                 WLAN_SA_QUERY_TR_ID_LEN);
 897         if (nbuf == NULL)
 898                 return;
 899         if (sta->sa_query_count == 0) {
 900                 /* Starting a new SA Query procedure */
 901                 os_get_reltime(&sta->sa_query_start);
 902         }
 903         trans_id = nbuf + sta->sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
 904         sta->sa_query_trans_id = nbuf;
 905         sta->sa_query_count++;
 906
 907         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 908
 909         timeout = hapd->conf->assoc_sa_query_retry_timeout;
 910         sec = ((timeout / 1000) * 1024) / 1000;
 911         usec = (timeout % 1000) * 1024;
 912         eloop_register_timeout(sec, usec, ap_sa_query_timer, hapd, sta);
 913
 914         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 915                        HOSTAPD_LEVEL_DEBUG,
 916                        "association SA Query attempt %d", sta->sa_query_count);
 917
 918         ieee802_11_send_sa_query_req(hapd, sta->addr, trans_id);
 919 }
 920
 921
 922 void ap_sta_start_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
 923 {
 924         ap_sa_query_timer(hapd, sta);
 925 }
 926
 927
 928 void ap_sta_stop_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
 929 {
 930         eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 931         os_free(sta->sa_query_trans_id);
 932         sta->sa_query_trans_id = NULL;
 933         sta->sa_query_count = 0;
 934 }
 935
 936 #endif /* CONFIG_IEEE80211W */
 937
 938
 939 void ap_sta_set_authorized(struct hostapd_data *hapd, struct sta_info *sta,
 940                            int authorized)
 941 {
 942         const u8 *dev_addr = NULL;
 943         char buf[100];
 944 #ifdef CONFIG_P2P
 945         u8 addr[ETH_ALEN];
 946         u8 ip_addr_buf[4];
 947 #endif /* CONFIG_P2P */
 948
 949         if (!!authorized == !!(sta->flags & WLAN_STA_AUTHORIZED))
 950                 return;
 951
 952 #ifdef CONFIG_P2P
 953         if (hapd->p2p_group == NULL) {
 954                 if (sta->p2p_ie != NULL &&
 955                     p2p_parse_dev_addr_in_p2p_ie(sta->p2p_ie, addr) == 0)
 956                         dev_addr = addr;
 957         } else
 958                 dev_addr = p2p_group_get_dev_addr(hapd->p2p_group, sta->addr);
 959
 960         if (dev_addr)
 961                 os_snprintf(buf, sizeof(buf), MACSTR " p2p_dev_addr=" MACSTR,
 962                             MAC2STR(sta->addr), MAC2STR(dev_addr));
 963         else
 964 #endif /* CONFIG_P2P */
 965                 os_snprintf(buf, sizeof(buf), MACSTR, MAC2STR(sta->addr));
 966
 967         if (authorized) {
 968                 char ip_addr[100];
 969                 ip_addr[0] = '\0';
 970 #ifdef CONFIG_P2P
 971                 if (wpa_auth_get_ip_addr(sta->wpa_sm, ip_addr_buf) == 0) {
 972                         os_snprintf(ip_addr, sizeof(ip_addr),
 973                                     " ip_addr=%u.%u.%u.%u",
 974                                     ip_addr_buf[0], ip_addr_buf[1],
 975                                     ip_addr_buf[2], ip_addr_buf[3]);
 976                 }
 977 #endif /* CONFIG_P2P */
 978
 979                 wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_CONNECTED "%s%s",
 980                         buf, ip_addr);
 981
 982                 if (hapd->msg_ctx_parent &&
 983                     hapd->msg_ctx_parent != hapd->msg_ctx)
 984                         wpa_msg_no_global(hapd->msg_ctx_parent, MSG_INFO,
 985                                           AP_STA_CONNECTED "%s%s",
 986                                           buf, ip_addr);
 987
 988                 sta->flags |= WLAN_STA_AUTHORIZED;
 989         } else {
 990                 wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_DISCONNECTED "%s", buf);
 991
 992                 if (hapd->msg_ctx_parent &&
 993                     hapd->msg_ctx_parent != hapd->msg_ctx)
 994                         wpa_msg_no_global(hapd->msg_ctx_parent, MSG_INFO,
 995                                           AP_STA_DISCONNECTED "%s", buf);
 996
 997                 sta->flags &= ~WLAN_STA_AUTHORIZED;
 998         }
 999
1000         if (hapd->sta_authorized_cb)
1001                 hapd->sta_authorized_cb(hapd->sta_authorized_cb_ctx,
1002                                         sta->addr, authorized, dev_addr);
1003 }
1004
1005
1006 void ap_sta_disconnect(struct hostapd_data *hapd, struct sta_info *sta,
1007                        const u8 *addr, u16 reason)
1008 {
1009
1010         if (sta == NULL && addr)
1011                 sta = ap_get_sta(hapd, addr);
1012
1013         if (addr)
1014                 hostapd_drv_sta_deauth(hapd, addr, reason);
1015
1016         if (sta == NULL)
1017                 return;
1018         ap_sta_set_authorized(hapd, sta, 0);
1019         wpa_auth_sm_event(sta->wpa_sm, WPA_DEAUTH);
1020         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
1021         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
1022         wpa_printf(MSG_DEBUG, "%s: reschedule ap_handle_timer timeout "
1023                    "for " MACSTR " (%d seconds - "
1024                    "AP_MAX_INACTIVITY_AFTER_DEAUTH)",
1025                    __func__, MAC2STR(sta->addr),
1026                    AP_MAX_INACTIVITY_AFTER_DEAUTH);
1027         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
1028         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DEAUTH, 0,
1029                                ap_handle_timer, hapd, sta);
1030         sta->timeout_next = STA_REMOVE;
1031
1032         sta->deauth_reason = reason;
1033         sta->flags |= WLAN_STA_PENDING_DEAUTH_CB;
1034         eloop_cancel_timeout(ap_sta_deauth_cb_timeout, hapd, sta);
1035         eloop_register_timeout(hapd->iface->drv_flags &
1036                                WPA_DRIVER_FLAGS_DEAUTH_TX_STATUS ? 2 : 0, 0,
1037                                ap_sta_deauth_cb_timeout, hapd, sta);
1038 }
1039
1040
1041 void ap_sta_deauth_cb(struct hostapd_data *hapd, struct sta_info *sta)
1042 {
1043         if (!(sta->flags & WLAN_STA_PENDING_DEAUTH_CB)) {
1044                 wpa_printf(MSG_DEBUG, "Ignore deauth cb for test frame");
1045                 return;
1046         }
1047         sta->flags &= ~WLAN_STA_PENDING_DEAUTH_CB;
1048         eloop_cancel_timeout(ap_sta_deauth_cb_timeout, hapd, sta);
1049         ap_sta_deauth_cb_timeout(hapd, sta);
1050 }
1051
1052
1053 void ap_sta_disassoc_cb(struct hostapd_data *hapd, struct sta_info *sta)
1054 {
1055         if (!(sta->flags & WLAN_STA_PENDING_DISASSOC_CB)) {
1056                 wpa_printf(MSG_DEBUG, "Ignore disassoc cb for test frame");
1057                 return;
1058         }
1059         sta->flags &= ~WLAN_STA_PENDING_DISASSOC_CB;
1060         eloop_cancel_timeout(ap_sta_disassoc_cb_timeout, hapd, sta);
1061         ap_sta_disassoc_cb_timeout(hapd, sta);
1062 }
1063
1064
1065 int ap_sta_flags_txt(u32 flags, char *buf, size_t buflen)
1066 {
1067         int res;
1068
1069         buf[0] = '\0';
1070         res = os_snprintf(buf, buflen, "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
1071                           (flags & WLAN_STA_AUTH ? "[AUTH]" : ""),
1072                           (flags & WLAN_STA_ASSOC ? "[ASSOC]" : ""),
1073                           (flags & WLAN_STA_AUTHORIZED ? "[AUTHORIZED]" : ""),
1074                           (flags & WLAN_STA_PENDING_POLL ? "[PENDING_POLL" :
1075                            ""),
1076                           (flags & WLAN_STA_SHORT_PREAMBLE ?
1077                            "[SHORT_PREAMBLE]" : ""),
1078                           (flags & WLAN_STA_PREAUTH ? "[PREAUTH]" : ""),
1079                           (flags & WLAN_STA_WMM ? "[WMM]" : ""),
1080                           (flags & WLAN_STA_MFP ? "[MFP]" : ""),
1081                           (flags & WLAN_STA_WPS ? "[WPS]" : ""),
1082                           (flags & WLAN_STA_MAYBE_WPS ? "[MAYBE_WPS]" : ""),
1083                           (flags & WLAN_STA_WDS ? "[WDS]" : ""),
1084                           (flags & WLAN_STA_NONERP ? "[NonERP]" : ""),
1085                           (flags & WLAN_STA_WPS2 ? "[WPS2]" : ""),
1086                           (flags & WLAN_STA_GAS ? "[GAS]" : ""),
1087                           (flags & WLAN_STA_VHT ? "[VHT]" : ""),
1088                           (flags & WLAN_STA_WNM_SLEEP_MODE ?
1089                            "[WNM_SLEEP_MODE]" : ""));
1090
1091         return res;
1092 }