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_P2P
 210         if (sta->no_p2p_set) {
 211                 sta->no_p2p_set = 0;
 212                 hapd->num_sta_no_p2p--;
 213                 if (hapd->num_sta_no_p2p == 0)
 214                         hostapd_p2p_non_p2p_sta_disconnected(hapd);
 215         }
 216 #endif /* CONFIG_P2P */
 217
 218 #if defined(NEED_AP_MLME) && defined(CONFIG_IEEE80211N)
 219         if (hostapd_ht_operation_update(hapd->iface) > 0)
 220                 set_beacon++;
 221 #endif /* NEED_AP_MLME && CONFIG_IEEE80211N */
 222
 223         if (set_beacon)
 224                 ieee802_11_set_beacons(hapd->iface);
 225
 226         wpa_printf(MSG_DEBUG, "%s: cancel ap_handle_timer for " MACSTR,
 227                    __func__, MAC2STR(sta->addr));
 228         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 229         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 230         eloop_cancel_timeout(ap_handle_session_warning_timer, hapd, sta);
 231         eloop_cancel_timeout(ap_sta_deauth_cb_timeout, hapd, sta);
 232         eloop_cancel_timeout(ap_sta_disassoc_cb_timeout, hapd, sta);
 233
 234         ieee802_1x_free_station(sta);
 235         wpa_auth_sta_deinit(sta->wpa_sm);
 236         rsn_preauth_free_station(hapd, sta);
 237 #ifndef CONFIG_NO_RADIUS
 238         if (hapd->radius)
 239                 radius_client_flush_auth(hapd->radius, sta->addr);
 240 #endif /* CONFIG_NO_RADIUS */
 241
 242         os_free(sta->challenge);
 243
 244 #ifdef CONFIG_IEEE80211W
 245         os_free(sta->sa_query_trans_id);
 246         eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 247 #endif /* CONFIG_IEEE80211W */
 248
 249 #ifdef CONFIG_P2P
 250         p2p_group_notif_disassoc(hapd->p2p_group, sta->addr);
 251 #endif /* CONFIG_P2P */
 252
 253 #ifdef CONFIG_INTERWORKING
 254         if (sta->gas_dialog) {
 255                 int i;
 256                 for (i = 0; i < GAS_DIALOG_MAX; i++)
 257                         gas_serv_dialog_clear(&sta->gas_dialog[i]);
 258                 os_free(sta->gas_dialog);
 259         }
 260 #endif /* CONFIG_INTERWORKING */
 261
 262         wpabuf_free(sta->wps_ie);
 263         wpabuf_free(sta->p2p_ie);
 264         wpabuf_free(sta->hs20_ie);
 265
 266         os_free(sta->ht_capabilities);
 267         os_free(sta->vht_capabilities);
 268         hostapd_free_psk_list(sta->psk);
 269         os_free(sta->identity);
 270         os_free(sta->radius_cui);
 271         os_free(sta->remediation_url);
 272         wpabuf_free(sta->hs20_deauth_req);
 273         os_free(sta->hs20_session_info_url);
 274
 275 #ifdef CONFIG_SAE
 276         sae_clear_data(sta->sae);
 277         os_free(sta->sae);
 278 #endif /* CONFIG_SAE */
 279
 280         os_free(sta);
 281 }
 282
 283
 284 void hostapd_free_stas(struct hostapd_data *hapd)
 285 {
 286         struct sta_info *sta, *prev;
 287
 288         sta = hapd->sta_list;
 289
 290         while (sta) {
 291                 prev = sta;
 292                 if (sta->flags & WLAN_STA_AUTH) {
 293                         mlme_deauthenticate_indication(
 294                                 hapd, sta, WLAN_REASON_UNSPECIFIED);
 295                 }
 296                 sta = sta->next;
 297                 wpa_printf(MSG_DEBUG, "Removing station " MACSTR,
 298                            MAC2STR(prev->addr));
 299                 ap_free_sta(hapd, prev);
 300         }
 301 }
 302
 303
 304 /**
 305  * ap_handle_timer - Per STA timer handler
 306  * @eloop_ctx: struct hostapd_data *
 307  * @timeout_ctx: struct sta_info *
 308  *
 309  * This function is called to check station activity and to remove inactive
 310  * stations.
 311  */
 312 void ap_handle_timer(void *eloop_ctx, void *timeout_ctx)
 313 {
 314         struct hostapd_data *hapd = eloop_ctx;
 315         struct sta_info *sta = timeout_ctx;
 316         unsigned long next_time = 0;
 317         int reason;
 318
 319         wpa_printf(MSG_DEBUG, "%s: " MACSTR " flags=0x%x timeout_next=%d",
 320                    __func__, MAC2STR(sta->addr), sta->flags,
 321                    sta->timeout_next);
 322         if (sta->timeout_next == STA_REMOVE) {
 323                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 324                                HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 325                                "local deauth request");
 326                 ap_free_sta(hapd, sta);
 327                 return;
 328         }
 329
 330         if ((sta->flags & WLAN_STA_ASSOC) &&
 331             (sta->timeout_next == STA_NULLFUNC ||
 332              sta->timeout_next == STA_DISASSOC)) {
 333                 int inactive_sec;
 334                 /*
 335                  * Add random value to timeout so that we don't end up bouncing
 336                  * all stations at the same time if we have lots of associated
 337                  * stations that are idle (but keep re-associating).
 338                  */
 339                 int fuzz = os_random() % 20;
 340                 inactive_sec = hostapd_drv_get_inact_sec(hapd, sta->addr);
 341                 if (inactive_sec == -1) {
 342                         wpa_msg(hapd->msg_ctx, MSG_DEBUG,
 343                                 "Check inactivity: Could not "
 344                                 "get station info from kernel driver for "
 345                                 MACSTR, MAC2STR(sta->addr));
 346                         /*
 347                          * The driver may not support this functionality.
 348                          * Anyway, try again after the next inactivity timeout,
 349                          * but do not disconnect the station now.
 350                          */
 351                         next_time = hapd->conf->ap_max_inactivity + fuzz;
 352                 } else if (inactive_sec < hapd->conf->ap_max_inactivity &&
 353                            sta->flags & WLAN_STA_ASSOC) {
 354                         /* station activity detected; reset timeout state */
 355                         wpa_msg(hapd->msg_ctx, MSG_DEBUG,
 356                                 "Station " MACSTR " has been active %is ago",
 357                                 MAC2STR(sta->addr), inactive_sec);
 358                         sta->timeout_next = STA_NULLFUNC;
 359                         next_time = hapd->conf->ap_max_inactivity + fuzz -
 360                                 inactive_sec;
 361                 } else {
 362                         wpa_msg(hapd->msg_ctx, MSG_DEBUG,
 363                                 "Station " MACSTR " has been "
 364                                 "inactive too long: %d sec, max allowed: %d",
 365                                 MAC2STR(sta->addr), inactive_sec,
 366                                 hapd->conf->ap_max_inactivity);
 367
 368                         if (hapd->conf->skip_inactivity_poll)
 369                                 sta->timeout_next = STA_DISASSOC;
 370                 }
 371         }
 372
 373         if ((sta->flags & WLAN_STA_ASSOC) &&
 374             sta->timeout_next == STA_DISASSOC &&
 375             !(sta->flags & WLAN_STA_PENDING_POLL) &&
 376             !hapd->conf->skip_inactivity_poll) {
 377                 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "Station " MACSTR
 378                         " has ACKed data poll", MAC2STR(sta->addr));
 379                 /* data nullfunc frame poll did not produce TX errors; assume
 380                  * station ACKed it */
 381                 sta->timeout_next = STA_NULLFUNC;
 382                 next_time = hapd->conf->ap_max_inactivity;
 383         }
 384
 385         if (next_time) {
 386                 wpa_printf(MSG_DEBUG, "%s: register ap_handle_timer timeout "
 387                            "for " MACSTR " (%lu seconds)",
 388                            __func__, MAC2STR(sta->addr), next_time);
 389                 eloop_register_timeout(next_time, 0, ap_handle_timer, hapd,
 390                                        sta);
 391                 return;
 392         }
 393
 394         if (sta->timeout_next == STA_NULLFUNC &&
 395             (sta->flags & WLAN_STA_ASSOC)) {
 396                 wpa_printf(MSG_DEBUG, "  Polling STA");
 397                 sta->flags |= WLAN_STA_PENDING_POLL;
 398                 hostapd_drv_poll_client(hapd, hapd->own_addr, sta->addr,
 399                                         sta->flags & WLAN_STA_WMM);
 400         } else if (sta->timeout_next != STA_REMOVE) {
 401                 int deauth = sta->timeout_next == STA_DEAUTH;
 402
 403                 wpa_dbg(hapd->msg_ctx, MSG_DEBUG,
 404                         "Timeout, sending %s info to STA " MACSTR,
 405                         deauth ? "deauthentication" : "disassociation",
 406                         MAC2STR(sta->addr));
 407
 408                 if (deauth) {
 409                         hostapd_drv_sta_deauth(
 410                                 hapd, sta->addr,
 411                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
 412                 } else {
 413                         reason = (sta->timeout_next == STA_DISASSOC) ?
 414                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY :
 415                                 WLAN_REASON_PREV_AUTH_NOT_VALID;
 416
 417                         hostapd_drv_sta_disassoc(hapd, sta->addr, reason);
 418                 }
 419         }
 420
 421         switch (sta->timeout_next) {
 422         case STA_NULLFUNC:
 423                 sta->timeout_next = STA_DISASSOC;
 424                 wpa_printf(MSG_DEBUG, "%s: register ap_handle_timer timeout "
 425                            "for " MACSTR " (%d seconds - AP_DISASSOC_DELAY)",
 426                            __func__, MAC2STR(sta->addr), AP_DISASSOC_DELAY);
 427                 eloop_register_timeout(AP_DISASSOC_DELAY, 0, ap_handle_timer,
 428                                        hapd, sta);
 429                 break;
 430         case STA_DISASSOC:
 431         case STA_DISASSOC_FROM_CLI:
 432                 ap_sta_set_authorized(hapd, sta, 0);
 433                 sta->flags &= ~WLAN_STA_ASSOC;
 434                 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 435                 if (!sta->acct_terminate_cause)
 436                         sta->acct_terminate_cause =
 437                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
 438                 accounting_sta_stop(hapd, sta);
 439                 ieee802_1x_free_station(sta);
 440                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 441                                HOSTAPD_LEVEL_INFO, "disassociated due to "
 442                                "inactivity");
 443                 reason = (sta->timeout_next == STA_DISASSOC) ?
 444                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY :
 445                         WLAN_REASON_PREV_AUTH_NOT_VALID;
 446                 sta->timeout_next = STA_DEAUTH;
 447                 wpa_printf(MSG_DEBUG, "%s: register ap_handle_timer timeout "
 448                            "for " MACSTR " (%d seconds - AP_DEAUTH_DELAY)",
 449                            __func__, MAC2STR(sta->addr), AP_DEAUTH_DELAY);
 450                 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer,
 451                                        hapd, sta);
 452                 mlme_disassociate_indication(hapd, sta, reason);
 453                 break;
 454         case STA_DEAUTH:
 455         case STA_REMOVE:
 456                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 457                                HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 458                                "inactivity (timer DEAUTH/REMOVE)");
 459                 if (!sta->acct_terminate_cause)
 460                         sta->acct_terminate_cause =
 461                                 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
 462                 mlme_deauthenticate_indication(
 463                         hapd, sta,
 464                         WLAN_REASON_PREV_AUTH_NOT_VALID);
 465                 ap_free_sta(hapd, sta);
 466                 break;
 467         }
 468 }
 469
 470
 471 static void ap_handle_session_timer(void *eloop_ctx, void *timeout_ctx)
 472 {
 473         struct hostapd_data *hapd = eloop_ctx;
 474         struct sta_info *sta = timeout_ctx;
 475
 476         if (!(sta->flags & WLAN_STA_AUTH)) {
 477                 if (sta->flags & WLAN_STA_GAS) {
 478                         wpa_printf(MSG_DEBUG, "GAS: Remove temporary STA "
 479                                    "entry " MACSTR, MAC2STR(sta->addr));
 480                         ap_free_sta(hapd, sta);
 481                 }
 482                 return;
 483         }
 484
 485         hostapd_drv_sta_deauth(hapd, sta->addr,
 486                                WLAN_REASON_PREV_AUTH_NOT_VALID);
 487         mlme_deauthenticate_indication(hapd, sta,
 488                                        WLAN_REASON_PREV_AUTH_NOT_VALID);
 489         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 490                        HOSTAPD_LEVEL_INFO, "deauthenticated due to "
 491                        "session timeout");
 492         sta->acct_terminate_cause =
 493                 RADIUS_ACCT_TERMINATE_CAUSE_SESSION_TIMEOUT;
 494         ap_free_sta(hapd, sta);
 495 }
 496
 497
 498 void ap_sta_replenish_timeout(struct hostapd_data *hapd, struct sta_info *sta,
 499                               u32 session_timeout)
 500 {
 501         if (eloop_replenish_timeout(session_timeout, 0,
 502                                     ap_handle_session_timer, hapd, sta) == 1) {
 503                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 504                                HOSTAPD_LEVEL_DEBUG, "setting session timeout "
 505                                "to %d seconds", session_timeout);
 506         }
 507 }
 508
 509
 510 void ap_sta_session_timeout(struct hostapd_data *hapd, struct sta_info *sta,
 511                             u32 session_timeout)
 512 {
 513         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 514                        HOSTAPD_LEVEL_DEBUG, "setting session timeout to %d "
 515                        "seconds", session_timeout);
 516         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 517         eloop_register_timeout(session_timeout, 0, ap_handle_session_timer,
 518                                hapd, sta);
 519 }
 520
 521
 522 void ap_sta_no_session_timeout(struct hostapd_data *hapd, struct sta_info *sta)
 523 {
 524         eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
 525 }
 526
 527
 528 static void ap_handle_session_warning_timer(void *eloop_ctx, void *timeout_ctx)
 529 {
 530 #ifdef CONFIG_WNM
 531         struct hostapd_data *hapd = eloop_ctx;
 532         struct sta_info *sta = timeout_ctx;
 533
 534         wpa_printf(MSG_DEBUG, "WNM: Session warning time reached for " MACSTR,
 535                    MAC2STR(sta->addr));
 536         if (sta->hs20_session_info_url == NULL)
 537                 return;
 538
 539         wnm_send_ess_disassoc_imminent(hapd, sta, sta->hs20_session_info_url,
 540                                        sta->hs20_disassoc_timer);
 541 #endif /* CONFIG_WNM */
 542 }
 543
 544
 545 void ap_sta_session_warning_timeout(struct hostapd_data *hapd,
 546                                     struct sta_info *sta, int warning_time)
 547 {
 548         eloop_cancel_timeout(ap_handle_session_warning_timer, hapd, sta);
 549         eloop_register_timeout(warning_time, 0, ap_handle_session_warning_timer,
 550                                hapd, sta);
 551 }
 552
 553
 554 struct sta_info * ap_sta_add(struct hostapd_data *hapd, const u8 *addr)
 555 {
 556         struct sta_info *sta;
 557
 558         sta = ap_get_sta(hapd, addr);
 559         if (sta)
 560                 return sta;
 561
 562         wpa_printf(MSG_DEBUG, "  New STA");
 563         if (hapd->num_sta >= hapd->conf->max_num_sta) {
 564                 /* FIX: might try to remove some old STAs first? */
 565                 wpa_printf(MSG_DEBUG, "no more room for new STAs (%d/%d)",
 566                            hapd->num_sta, hapd->conf->max_num_sta);
 567                 return NULL;
 568         }
 569
 570         sta = os_zalloc(sizeof(struct sta_info));
 571         if (sta == NULL) {
 572                 wpa_printf(MSG_ERROR, "malloc failed");
 573                 return NULL;
 574         }
 575         sta->acct_interim_interval = hapd->conf->acct_interim_interval;
 576         accounting_sta_get_id(hapd, sta);
 577
 578         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_INACTIVITY_TIMER)) {
 579                 wpa_printf(MSG_DEBUG, "%s: register ap_handle_timer timeout "
 580                            "for " MACSTR " (%d seconds - ap_max_inactivity)",
 581                            __func__, MAC2STR(addr),
 582                            hapd->conf->ap_max_inactivity);
 583                 eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
 584                                        ap_handle_timer, hapd, sta);
 585         }
 586
 587         /* initialize STA info data */
 588         os_memcpy(sta->addr, addr, ETH_ALEN);
 589         sta->next = hapd->sta_list;
 590         hapd->sta_list = sta;
 591         hapd->num_sta++;
 592         ap_sta_hash_add(hapd, sta);
 593         sta->ssid = &hapd->conf->ssid;
 594         ap_sta_remove_in_other_bss(hapd, sta);
 595
 596         return sta;
 597 }
 598
 599
 600 static int ap_sta_remove(struct hostapd_data *hapd, struct sta_info *sta)
 601 {
 602         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 603
 604         wpa_printf(MSG_DEBUG, "Removing STA " MACSTR " from kernel driver",
 605                    MAC2STR(sta->addr));
 606         if (hostapd_drv_sta_remove(hapd, sta->addr) &&
 607             sta->flags & WLAN_STA_ASSOC) {
 608                 wpa_printf(MSG_DEBUG, "Could not remove station " MACSTR
 609                            " from kernel driver.", MAC2STR(sta->addr));
 610                 return -1;
 611         }
 612         return 0;
 613 }
 614
 615
 616 static void ap_sta_remove_in_other_bss(struct hostapd_data *hapd,
 617                                        struct sta_info *sta)
 618 {
 619         struct hostapd_iface *iface = hapd->iface;
 620         size_t i;
 621
 622         for (i = 0; i < iface->num_bss; i++) {
 623                 struct hostapd_data *bss = iface->bss[i];
 624                 struct sta_info *sta2;
 625                 /* bss should always be set during operation, but it may be
 626                  * NULL during reconfiguration. Assume the STA is not
 627                  * associated to another BSS in that case to avoid NULL pointer
 628                  * dereferences. */
 629                 if (bss == hapd || bss == NULL)
 630                         continue;
 631                 sta2 = ap_get_sta(bss, sta->addr);
 632                 if (!sta2)
 633                         continue;
 634
 635                 ap_sta_disconnect(bss, sta2, sta2->addr,
 636                                   WLAN_REASON_PREV_AUTH_NOT_VALID);
 637         }
 638 }
 639
 640
 641 static void ap_sta_disassoc_cb_timeout(void *eloop_ctx, void *timeout_ctx)
 642 {
 643         struct hostapd_data *hapd = eloop_ctx;
 644         struct sta_info *sta = timeout_ctx;
 645
 646         ap_sta_remove(hapd, sta);
 647         mlme_disassociate_indication(hapd, sta, sta->disassoc_reason);
 648 }
 649
 650
 651 void ap_sta_disassociate(struct hostapd_data *hapd, struct sta_info *sta,
 652                          u16 reason)
 653 {
 654         wpa_printf(MSG_DEBUG, "%s: disassociate STA " MACSTR,
 655                    hapd->conf->iface, MAC2STR(sta->addr));
 656         sta->flags &= ~(WLAN_STA_ASSOC | WLAN_STA_ASSOC_REQ_OK);
 657         ap_sta_set_authorized(hapd, sta, 0);
 658         sta->timeout_next = STA_DEAUTH;
 659         wpa_printf(MSG_DEBUG, "%s: reschedule ap_handle_timer timeout "
 660                    "for " MACSTR " (%d seconds - "
 661                    "AP_MAX_INACTIVITY_AFTER_DISASSOC)",
 662                    __func__, MAC2STR(sta->addr),
 663                    AP_MAX_INACTIVITY_AFTER_DISASSOC);
 664         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 665         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DISASSOC, 0,
 666                                ap_handle_timer, hapd, sta);
 667         accounting_sta_stop(hapd, sta);
 668         ieee802_1x_free_station(sta);
 669
 670         sta->disassoc_reason = reason;
 671         sta->flags |= WLAN_STA_PENDING_DISASSOC_CB;
 672         eloop_cancel_timeout(ap_sta_disassoc_cb_timeout, hapd, sta);
 673         eloop_register_timeout(hapd->iface->drv_flags &
 674                                WPA_DRIVER_FLAGS_DEAUTH_TX_STATUS ? 2 : 0, 0,
 675                                ap_sta_disassoc_cb_timeout, hapd, sta);
 676 }
 677
 678
 679 static void ap_sta_deauth_cb_timeout(void *eloop_ctx, void *timeout_ctx)
 680 {
 681         struct hostapd_data *hapd = eloop_ctx;
 682         struct sta_info *sta = timeout_ctx;
 683
 684         ap_sta_remove(hapd, sta);
 685         mlme_deauthenticate_indication(hapd, sta, sta->deauth_reason);
 686 }
 687
 688
 689 void ap_sta_deauthenticate(struct hostapd_data *hapd, struct sta_info *sta,
 690                            u16 reason)
 691 {
 692         wpa_printf(MSG_DEBUG, "%s: deauthenticate STA " MACSTR,
 693                    hapd->conf->iface, MAC2STR(sta->addr));
 694         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
 695         ap_sta_set_authorized(hapd, sta, 0);
 696         sta->timeout_next = STA_REMOVE;
 697         wpa_printf(MSG_DEBUG, "%s: reschedule ap_handle_timer timeout "
 698                    "for " MACSTR " (%d seconds - "
 699                    "AP_MAX_INACTIVITY_AFTER_DEAUTH)",
 700                    __func__, MAC2STR(sta->addr),
 701                    AP_MAX_INACTIVITY_AFTER_DEAUTH);
 702         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
 703         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DEAUTH, 0,
 704                                ap_handle_timer, hapd, sta);
 705         accounting_sta_stop(hapd, sta);
 706         ieee802_1x_free_station(sta);
 707
 708         sta->deauth_reason = reason;
 709         sta->flags |= WLAN_STA_PENDING_DEAUTH_CB;
 710         eloop_cancel_timeout(ap_sta_deauth_cb_timeout, hapd, sta);
 711         eloop_register_timeout(hapd->iface->drv_flags &
 712                                WPA_DRIVER_FLAGS_DEAUTH_TX_STATUS ? 2 : 0, 0,
 713                                ap_sta_deauth_cb_timeout, hapd, sta);
 714 }
 715
 716
 717 #ifdef CONFIG_WPS
 718 int ap_sta_wps_cancel(struct hostapd_data *hapd,
 719                       struct sta_info *sta, void *ctx)
 720 {
 721         if (sta && (sta->flags & WLAN_STA_WPS)) {
 722                 ap_sta_deauthenticate(hapd, sta,
 723                                       WLAN_REASON_PREV_AUTH_NOT_VALID);
 724                 wpa_printf(MSG_DEBUG, "WPS: %s: Deauth sta=" MACSTR,
 725                            __func__, MAC2STR(sta->addr));
 726                 return 1;
 727         }
 728
 729         return 0;
 730 }
 731 #endif /* CONFIG_WPS */
 732
 733
 734 int ap_sta_bind_vlan(struct hostapd_data *hapd, struct sta_info *sta,
 735                      int old_vlanid)
 736 {
 737 #ifndef CONFIG_NO_VLAN
 738         const char *iface;
 739         struct hostapd_vlan *vlan = NULL;
 740         int ret;
 741
 742         /*
 743          * Do not proceed furthur if the vlan id remains same. We do not want
 744          * duplicate dynamic vlan entries.
 745          */
 746         if (sta->vlan_id == old_vlanid)
 747                 return 0;
 748
 749         /*
 750          * During 1x reauth, if the vlan id changes, then remove the old id and
 751          * proceed furthur to add the new one.
 752          */
 753         if (old_vlanid > 0)
 754                 vlan_remove_dynamic(hapd, old_vlanid);
 755
 756         iface = hapd->conf->iface;
 757         if (sta->ssid->vlan[0])
 758                 iface = sta->ssid->vlan;
 759
 760         if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
 761                 sta->vlan_id = 0;
 762         else if (sta->vlan_id > 0) {
 763                 struct hostapd_vlan *wildcard_vlan = NULL;
 764                 vlan = hapd->conf->vlan;
 765                 while (vlan) {
 766                         if (vlan->vlan_id == sta->vlan_id)
 767                                 break;
 768                         if (vlan->vlan_id == VLAN_ID_WILDCARD)
 769                                 wildcard_vlan = vlan;
 770                         vlan = vlan->next;
 771                 }
 772                 if (!vlan)
 773                         vlan = wildcard_vlan;
 774                 if (vlan)
 775                         iface = vlan->ifname;
 776         }
 777
 778         if (sta->vlan_id > 0 && vlan == NULL) {
 779                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 780                                HOSTAPD_LEVEL_DEBUG, "could not find VLAN for "
 781                                "binding station to (vlan_id=%d)",
 782                                sta->vlan_id);
 783                 return -1;
 784         } else if (sta->vlan_id > 0 && vlan->vlan_id == VLAN_ID_WILDCARD) {
 785                 vlan = vlan_add_dynamic(hapd, vlan, sta->vlan_id);
 786                 if (vlan == NULL) {
 787                         hostapd_logger(hapd, sta->addr,
 788                                        HOSTAPD_MODULE_IEEE80211,
 789                                        HOSTAPD_LEVEL_DEBUG, "could not add "
 790                                        "dynamic VLAN interface for vlan_id=%d",
 791                                        sta->vlan_id);
 792                         return -1;
 793                 }
 794
 795                 iface = vlan->ifname;
 796                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 797                         hostapd_logger(hapd, sta->addr,
 798                                        HOSTAPD_MODULE_IEEE80211,
 799                                        HOSTAPD_LEVEL_DEBUG, "could not "
 800                                        "configure encryption for dynamic VLAN "
 801                                        "interface for vlan_id=%d",
 802                                        sta->vlan_id);
 803                 }
 804
 805                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 806                                HOSTAPD_LEVEL_DEBUG, "added new dynamic VLAN "
 807                                "interface '%s'", iface);
 808         } else if (vlan && vlan->vlan_id == sta->vlan_id) {
 809                 if (sta->vlan_id > 0) {
 810                         vlan->dynamic_vlan++;
 811                         hostapd_logger(hapd, sta->addr,
 812                                        HOSTAPD_MODULE_IEEE80211,
 813                                        HOSTAPD_LEVEL_DEBUG, "updated existing "
 814                                        "dynamic VLAN interface '%s'", iface);
 815                 }
 816
 817                 /*
 818                  * Update encryption configuration for statically generated
 819                  * VLAN interface. This is only used for static WEP
 820                  * configuration for the case where hostapd did not yet know
 821                  * which keys are to be used when the interface was added.
 822                  */
 823                 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
 824                         hostapd_logger(hapd, sta->addr,
 825                                        HOSTAPD_MODULE_IEEE80211,
 826                                        HOSTAPD_LEVEL_DEBUG, "could not "
 827                                        "configure encryption for VLAN "
 828                                        "interface for vlan_id=%d",
 829                                        sta->vlan_id);
 830                 }
 831         }
 832
 833         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 834                        HOSTAPD_LEVEL_DEBUG, "binding station to interface "
 835                        "'%s'", iface);
 836
 837         if (wpa_auth_sta_set_vlan(sta->wpa_sm, sta->vlan_id) < 0)
 838                 wpa_printf(MSG_INFO, "Failed to update VLAN-ID for WPA");
 839
 840         ret = hostapd_drv_set_sta_vlan(iface, hapd, sta->addr, sta->vlan_id);
 841         if (ret < 0) {
 842                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 843                                HOSTAPD_LEVEL_DEBUG, "could not bind the STA "
 844                                "entry to vlan_id=%d", sta->vlan_id);
 845         }
 846         return ret;
 847 #else /* CONFIG_NO_VLAN */
 848         return 0;
 849 #endif /* CONFIG_NO_VLAN */
 850 }
 851
 852
 853 #ifdef CONFIG_IEEE80211W
 854
 855 int ap_check_sa_query_timeout(struct hostapd_data *hapd, struct sta_info *sta)
 856 {
 857         u32 tu;
 858         struct os_reltime now, passed;
 859         os_get_reltime(&now);
 860         os_reltime_sub(&now, &sta->sa_query_start, &passed);
 861         tu = (passed.sec * 1000000 + passed.usec) / 1024;
 862         if (hapd->conf->assoc_sa_query_max_timeout < tu) {
 863                 hostapd_logger(hapd, sta->addr,
 864                                HOSTAPD_MODULE_IEEE80211,
 865                                HOSTAPD_LEVEL_DEBUG,
 866                                "association SA Query timed out");
 867                 sta->sa_query_timed_out = 1;
 868                 os_free(sta->sa_query_trans_id);
 869                 sta->sa_query_trans_id = NULL;
 870                 sta->sa_query_count = 0;
 871                 eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 872                 return 1;
 873         }
 874
 875         return 0;
 876 }
 877
 878
 879 static void ap_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
 880 {
 881         struct hostapd_data *hapd = eloop_ctx;
 882         struct sta_info *sta = timeout_ctx;
 883         unsigned int timeout, sec, usec;
 884         u8 *trans_id, *nbuf;
 885
 886         if (sta->sa_query_count > 0 &&
 887             ap_check_sa_query_timeout(hapd, sta))
 888                 return;
 889
 890         nbuf = os_realloc_array(sta->sa_query_trans_id,
 891                                 sta->sa_query_count + 1,
 892                                 WLAN_SA_QUERY_TR_ID_LEN);
 893         if (nbuf == NULL)
 894                 return;
 895         if (sta->sa_query_count == 0) {
 896                 /* Starting a new SA Query procedure */
 897                 os_get_reltime(&sta->sa_query_start);
 898         }
 899         trans_id = nbuf + sta->sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
 900         sta->sa_query_trans_id = nbuf;
 901         sta->sa_query_count++;
 902
 903         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 904
 905         timeout = hapd->conf->assoc_sa_query_retry_timeout;
 906         sec = ((timeout / 1000) * 1024) / 1000;
 907         usec = (timeout % 1000) * 1024;
 908         eloop_register_timeout(sec, usec, ap_sa_query_timer, hapd, sta);
 909
 910         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 911                        HOSTAPD_LEVEL_DEBUG,
 912                        "association SA Query attempt %d", sta->sa_query_count);
 913
 914         ieee802_11_send_sa_query_req(hapd, sta->addr, trans_id);
 915 }
 916
 917
 918 void ap_sta_start_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
 919 {
 920         ap_sa_query_timer(hapd, sta);
 921 }
 922
 923
 924 void ap_sta_stop_sa_query(struct hostapd_data *hapd, struct sta_info *sta)
 925 {
 926         eloop_cancel_timeout(ap_sa_query_timer, hapd, sta);
 927         os_free(sta->sa_query_trans_id);
 928         sta->sa_query_trans_id = NULL;
 929         sta->sa_query_count = 0;
 930 }
 931
 932 #endif /* CONFIG_IEEE80211W */
 933
 934
 935 void ap_sta_set_authorized(struct hostapd_data *hapd, struct sta_info *sta,
 936                            int authorized)
 937 {
 938         const u8 *dev_addr = NULL;
 939         char buf[100];
 940 #ifdef CONFIG_P2P
 941         u8 addr[ETH_ALEN];
 942         u8 ip_addr_buf[4];
 943 #endif /* CONFIG_P2P */
 944
 945         if (!!authorized == !!(sta->flags & WLAN_STA_AUTHORIZED))
 946                 return;
 947
 948 #ifdef CONFIG_P2P
 949         if (hapd->p2p_group == NULL) {
 950                 if (sta->p2p_ie != NULL &&
 951                     p2p_parse_dev_addr_in_p2p_ie(sta->p2p_ie, addr) == 0)
 952                         dev_addr = addr;
 953         } else
 954                 dev_addr = p2p_group_get_dev_addr(hapd->p2p_group, sta->addr);
 955 #endif /* CONFIG_P2P */
 956
 957         if (dev_addr)
 958                 os_snprintf(buf, sizeof(buf), MACSTR " p2p_dev_addr=" MACSTR,
 959                             MAC2STR(sta->addr), MAC2STR(dev_addr));
 960         else
 961                 os_snprintf(buf, sizeof(buf), MACSTR, MAC2STR(sta->addr));
 962
 963         if (authorized) {
 964                 char ip_addr[100];
 965                 ip_addr[0] = '\0';
 966 #ifdef CONFIG_P2P
 967                 if (wpa_auth_get_ip_addr(sta->wpa_sm, ip_addr_buf) == 0) {
 968                         os_snprintf(ip_addr, sizeof(ip_addr),
 969                                     " ip_addr=%u.%u.%u.%u",
 970                                     ip_addr_buf[0], ip_addr_buf[1],
 971                                     ip_addr_buf[2], ip_addr_buf[3]);
 972                 }
 973 #endif /* CONFIG_P2P */
 974
 975                 wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_CONNECTED "%s%s",
 976                         buf, ip_addr);
 977
 978                 if (hapd->msg_ctx_parent &&
 979                     hapd->msg_ctx_parent != hapd->msg_ctx)
 980                         wpa_msg_no_global(hapd->msg_ctx_parent, MSG_INFO,
 981                                           AP_STA_CONNECTED "%s%s",
 982                                           buf, ip_addr);
 983
 984                 sta->flags |= WLAN_STA_AUTHORIZED;
 985         } else {
 986                 wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_DISCONNECTED "%s", buf);
 987
 988                 if (hapd->msg_ctx_parent &&
 989                     hapd->msg_ctx_parent != hapd->msg_ctx)
 990                         wpa_msg_no_global(hapd->msg_ctx_parent, MSG_INFO,
 991                                           AP_STA_DISCONNECTED "%s", buf);
 992
 993                 sta->flags &= ~WLAN_STA_AUTHORIZED;
 994         }
 995
 996         if (hapd->sta_authorized_cb)
 997                 hapd->sta_authorized_cb(hapd->sta_authorized_cb_ctx,
 998                                         sta->addr, authorized, dev_addr);
 999 }
1000
1001
1002 void ap_sta_disconnect(struct hostapd_data *hapd, struct sta_info *sta,
1003                        const u8 *addr, u16 reason)
1004 {
1005
1006         if (sta == NULL && addr)
1007                 sta = ap_get_sta(hapd, addr);
1008
1009         if (addr)
1010                 hostapd_drv_sta_deauth(hapd, addr, reason);
1011
1012         if (sta == NULL)
1013                 return;
1014         ap_sta_set_authorized(hapd, sta, 0);
1015         wpa_auth_sm_event(sta->wpa_sm, WPA_DEAUTH);
1016         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
1017         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
1018         wpa_printf(MSG_DEBUG, "%s: reschedule ap_handle_timer timeout "
1019                    "for " MACSTR " (%d seconds - "
1020                    "AP_MAX_INACTIVITY_AFTER_DEAUTH)",
1021                    __func__, MAC2STR(sta->addr),
1022                    AP_MAX_INACTIVITY_AFTER_DEAUTH);
1023         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
1024         eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DEAUTH, 0,
1025                                ap_handle_timer, hapd, sta);
1026         sta->timeout_next = STA_REMOVE;
1027
1028         sta->deauth_reason = reason;
1029         sta->flags |= WLAN_STA_PENDING_DEAUTH_CB;
1030         eloop_cancel_timeout(ap_sta_deauth_cb_timeout, hapd, sta);
1031         eloop_register_timeout(hapd->iface->drv_flags &
1032                                WPA_DRIVER_FLAGS_DEAUTH_TX_STATUS ? 2 : 0, 0,
1033                                ap_sta_deauth_cb_timeout, hapd, sta);
1034 }
1035
1036
1037 void ap_sta_deauth_cb(struct hostapd_data *hapd, struct sta_info *sta)
1038 {
1039         if (!(sta->flags & WLAN_STA_PENDING_DEAUTH_CB)) {
1040                 wpa_printf(MSG_DEBUG, "Ignore deauth cb for test frame");
1041                 return;
1042         }
1043         sta->flags &= ~WLAN_STA_PENDING_DEAUTH_CB;
1044         eloop_cancel_timeout(ap_sta_deauth_cb_timeout, hapd, sta);
1045         ap_sta_deauth_cb_timeout(hapd, sta);
1046 }
1047
1048
1049 void ap_sta_disassoc_cb(struct hostapd_data *hapd, struct sta_info *sta)
1050 {
1051         if (!(sta->flags & WLAN_STA_PENDING_DISASSOC_CB)) {
1052                 wpa_printf(MSG_DEBUG, "Ignore disassoc cb for test frame");
1053                 return;
1054         }
1055         sta->flags &= ~WLAN_STA_PENDING_DISASSOC_CB;
1056         eloop_cancel_timeout(ap_sta_disassoc_cb_timeout, hapd, sta);
1057         ap_sta_disassoc_cb_timeout(hapd, sta);
1058 }
1059
1060
1061 int ap_sta_flags_txt(u32 flags, char *buf, size_t buflen)
1062 {
1063         int res;
1064
1065         buf[0] = '\0';
1066         res = os_snprintf(buf, buflen, "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
1067                           (flags & WLAN_STA_AUTH ? "[AUTH]" : ""),
1068                           (flags & WLAN_STA_ASSOC ? "[ASSOC]" : ""),
1069                           (flags & WLAN_STA_AUTHORIZED ? "[AUTHORIZED]" : ""),
1070                           (flags & WLAN_STA_PENDING_POLL ? "[PENDING_POLL" :
1071                            ""),
1072                           (flags & WLAN_STA_SHORT_PREAMBLE ?
1073                            "[SHORT_PREAMBLE]" : ""),
1074                           (flags & WLAN_STA_PREAUTH ? "[PREAUTH]" : ""),
1075                           (flags & WLAN_STA_WMM ? "[WMM]" : ""),
1076                           (flags & WLAN_STA_MFP ? "[MFP]" : ""),
1077                           (flags & WLAN_STA_WPS ? "[WPS]" : ""),
1078                           (flags & WLAN_STA_MAYBE_WPS ? "[MAYBE_WPS]" : ""),
1079                           (flags & WLAN_STA_WDS ? "[WDS]" : ""),
1080                           (flags & WLAN_STA_NONERP ? "[NonERP]" : ""),
1081                           (flags & WLAN_STA_WPS2 ? "[WPS2]" : ""),
1082                           (flags & WLAN_STA_GAS ? "[GAS]" : ""),
1083                           (flags & WLAN_STA_VHT ? "[VHT]" : ""),
1084                           (flags & WLAN_STA_WNM_SLEEP_MODE ?
1085                            "[WNM_SLEEP_MODE]" : ""));
1086
1087         return res;
1088 }