src/ap/drv_callbacks.c

   1 /*
   2  * hostapd / Callback functions for driver wrappers
   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 "radius/radius.h"
  13 #include "drivers/driver.h"
  14 #include "common/ieee802_11_defs.h"
  15 #include "common/ieee802_11_common.h"
  16 #include "common/wpa_ctrl.h"
  17 #include "crypto/random.h"
  18 #include "p2p/p2p.h"
  19 #include "wps/wps.h"
  20 #include "wnm_ap.h"
  21 #include "hostapd.h"
  22 #include "ieee802_11.h"
  23 #include "sta_info.h"
  24 #include "accounting.h"
  25 #include "tkip_countermeasures.h"
  26 #include "ieee802_1x.h"
  27 #include "wpa_auth.h"
  28 #include "wps_hostapd.h"
  29 #include "ap_drv_ops.h"
  30 #include "ap_config.h"
  31 #include "hw_features.h"
  32 #include "dfs.h"
  33
  34
  35 int hostapd_notif_assoc(struct hostapd_data *hapd, const u8 *addr,
  36                         const u8 *req_ies, size_t req_ies_len, int reassoc)
  37 {
  38         struct sta_info *sta;
  39         int new_assoc, res;
  40         struct ieee802_11_elems elems;
  41         const u8 *ie;
  42         size_t ielen;
  43 #ifdef CONFIG_IEEE80211R
  44         u8 buf[sizeof(struct ieee80211_mgmt) + 1024];
  45         u8 *p = buf;
  46 #endif /* CONFIG_IEEE80211R */
  47         u16 reason = WLAN_REASON_UNSPECIFIED;
  48         u16 status = WLAN_STATUS_SUCCESS;
  49         const u8 *p2p_dev_addr = NULL;
  50
  51         if (addr == NULL) {
  52                 /*
  53                  * This could potentially happen with unexpected event from the
  54                  * driver wrapper. This was seen at least in one case where the
  55                  * driver ended up being set to station mode while hostapd was
  56                  * running, so better make sure we stop processing such an
  57                  * event here.
  58                  */
  59                 wpa_printf(MSG_DEBUG, "hostapd_notif_assoc: Skip event with "
  60                            "no address");
  61                 return -1;
  62         }
  63         random_add_randomness(addr, ETH_ALEN);
  64
  65         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
  66                        HOSTAPD_LEVEL_INFO, "associated");
  67
  68         ieee802_11_parse_elems(req_ies, req_ies_len, &elems, 0);
  69         if (elems.wps_ie) {
  70                 ie = elems.wps_ie - 2;
  71                 ielen = elems.wps_ie_len + 2;
  72                 wpa_printf(MSG_DEBUG, "STA included WPS IE in (Re)AssocReq");
  73         } else if (elems.rsn_ie) {
  74                 ie = elems.rsn_ie - 2;
  75                 ielen = elems.rsn_ie_len + 2;
  76                 wpa_printf(MSG_DEBUG, "STA included RSN IE in (Re)AssocReq");
  77         } else if (elems.wpa_ie) {
  78                 ie = elems.wpa_ie - 2;
  79                 ielen = elems.wpa_ie_len + 2;
  80                 wpa_printf(MSG_DEBUG, "STA included WPA IE in (Re)AssocReq");
  81         } else {
  82                 ie = NULL;
  83                 ielen = 0;
  84                 wpa_printf(MSG_DEBUG, "STA did not include WPS/RSN/WPA IE in "
  85                            "(Re)AssocReq");
  86         }
  87
  88         sta = ap_get_sta(hapd, addr);
  89         if (sta) {
  90                 ap_sta_no_session_timeout(hapd, sta);
  91                 accounting_sta_stop(hapd, sta);
  92
  93                 /*
  94                  * Make sure that the previously registered inactivity timer
  95                  * will not remove the STA immediately.
  96                  */
  97                 sta->timeout_next = STA_NULLFUNC;
  98         } else {
  99                 sta = ap_sta_add(hapd, addr);
 100                 if (sta == NULL) {
 101                         hostapd_drv_sta_disassoc(hapd, addr,
 102                                                  WLAN_REASON_DISASSOC_AP_BUSY);
 103                         return -1;
 104                 }
 105         }
 106         sta->flags &= ~(WLAN_STA_WPS | WLAN_STA_MAYBE_WPS | WLAN_STA_WPS2);
 107
 108 #ifdef CONFIG_P2P
 109         if (elems.p2p) {
 110                 wpabuf_free(sta->p2p_ie);
 111                 sta->p2p_ie = ieee802_11_vendor_ie_concat(req_ies, req_ies_len,
 112                                                           P2P_IE_VENDOR_TYPE);
 113                 if (sta->p2p_ie)
 114                         p2p_dev_addr = p2p_get_go_dev_addr(sta->p2p_ie);
 115         }
 116 #endif /* CONFIG_P2P */
 117
 118 #ifdef CONFIG_INTERWORKING
 119         if (elems.ext_capab && elems.ext_capab_len > 4) {
 120                 if (elems.ext_capab[4] & 0x01)
 121                         sta->qos_map_enabled = 1;
 122         }
 123 #endif /* CONFIG_INTERWORKING */
 124
 125 #ifdef CONFIG_HS20
 126         wpabuf_free(sta->hs20_ie);
 127         if (elems.hs20 && elems.hs20_len > 4) {
 128                 sta->hs20_ie = wpabuf_alloc_copy(elems.hs20 + 4,
 129                                                  elems.hs20_len - 4);
 130         } else
 131                 sta->hs20_ie = NULL;
 132 #endif /* CONFIG_HS20 */
 133
 134         if (hapd->conf->wpa) {
 135                 if (ie == NULL || ielen == 0) {
 136 #ifdef CONFIG_WPS
 137                         if (hapd->conf->wps_state) {
 138                                 wpa_printf(MSG_DEBUG, "STA did not include "
 139                                            "WPA/RSN IE in (Re)Association "
 140                                            "Request - possible WPS use");
 141                                 sta->flags |= WLAN_STA_MAYBE_WPS;
 142                                 goto skip_wpa_check;
 143                         }
 144 #endif /* CONFIG_WPS */
 145
 146                         wpa_printf(MSG_DEBUG, "No WPA/RSN IE from STA");
 147                         return -1;
 148                 }
 149 #ifdef CONFIG_WPS
 150                 if (hapd->conf->wps_state && ie[0] == 0xdd && ie[1] >= 4 &&
 151                     os_memcmp(ie + 2, "\x00\x50\xf2\x04", 4) == 0) {
 152                         struct wpabuf *wps;
 153                         sta->flags |= WLAN_STA_WPS;
 154                         wps = ieee802_11_vendor_ie_concat(ie, ielen,
 155                                                           WPS_IE_VENDOR_TYPE);
 156                         if (wps) {
 157                                 if (wps_is_20(wps)) {
 158                                         wpa_printf(MSG_DEBUG, "WPS: STA "
 159                                                    "supports WPS 2.0");
 160                                         sta->flags |= WLAN_STA_WPS2;
 161                                 }
 162                                 wpabuf_free(wps);
 163                         }
 164                         goto skip_wpa_check;
 165                 }
 166 #endif /* CONFIG_WPS */
 167
 168                 if (sta->wpa_sm == NULL)
 169                         sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
 170                                                         sta->addr,
 171                                                         p2p_dev_addr);
 172                 if (sta->wpa_sm == NULL) {
 173                         wpa_printf(MSG_ERROR, "Failed to initialize WPA state "
 174                                    "machine");
 175                         return -1;
 176                 }
 177                 res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
 178                                           ie, ielen,
 179                                           elems.mdie, elems.mdie_len);
 180                 if (res != WPA_IE_OK) {
 181                         wpa_printf(MSG_DEBUG, "WPA/RSN information element "
 182                                    "rejected? (res %u)", res);
 183                         wpa_hexdump(MSG_DEBUG, "IE", ie, ielen);
 184                         if (res == WPA_INVALID_GROUP) {
 185                                 reason = WLAN_REASON_GROUP_CIPHER_NOT_VALID;
 186                                 status = WLAN_STATUS_GROUP_CIPHER_NOT_VALID;
 187                         } else if (res == WPA_INVALID_PAIRWISE) {
 188                                 reason = WLAN_REASON_PAIRWISE_CIPHER_NOT_VALID;
 189                                 status = WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID;
 190                         } else if (res == WPA_INVALID_AKMP) {
 191                                 reason = WLAN_REASON_AKMP_NOT_VALID;
 192                                 status = WLAN_STATUS_AKMP_NOT_VALID;
 193                         }
 194 #ifdef CONFIG_IEEE80211W
 195                         else if (res == WPA_MGMT_FRAME_PROTECTION_VIOLATION) {
 196                                 reason = WLAN_REASON_INVALID_IE;
 197                                 status = WLAN_STATUS_INVALID_IE;
 198                         } else if (res == WPA_INVALID_MGMT_GROUP_CIPHER) {
 199                                 reason = WLAN_REASON_GROUP_CIPHER_NOT_VALID;
 200                                 status = WLAN_STATUS_GROUP_CIPHER_NOT_VALID;
 201                         }
 202 #endif /* CONFIG_IEEE80211W */
 203                         else {
 204                                 reason = WLAN_REASON_INVALID_IE;
 205                                 status = WLAN_STATUS_INVALID_IE;
 206                         }
 207                         goto fail;
 208                 }
 209 #ifdef CONFIG_IEEE80211W
 210                 if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out &&
 211                     sta->sa_query_count > 0)
 212                         ap_check_sa_query_timeout(hapd, sta);
 213                 if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out &&
 214                     (sta->auth_alg != WLAN_AUTH_FT)) {
 215                         /*
 216                          * STA has already been associated with MFP and SA
 217                          * Query timeout has not been reached. Reject the
 218                          * association attempt temporarily and start SA Query,
 219                          * if one is not pending.
 220                          */
 221
 222                         if (sta->sa_query_count == 0)
 223                                 ap_sta_start_sa_query(hapd, sta);
 224
 225 #ifdef CONFIG_IEEE80211R
 226                         status = WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY;
 227
 228                         p = hostapd_eid_assoc_comeback_time(hapd, sta, p);
 229
 230                         hostapd_sta_assoc(hapd, addr, reassoc, status, buf,
 231                                           p - buf);
 232 #endif /* CONFIG_IEEE80211R */
 233                         return 0;
 234                 }
 235
 236                 if (wpa_auth_uses_mfp(sta->wpa_sm))
 237                         sta->flags |= WLAN_STA_MFP;
 238                 else
 239                         sta->flags &= ~WLAN_STA_MFP;
 240 #endif /* CONFIG_IEEE80211W */
 241
 242 #ifdef CONFIG_IEEE80211R
 243                 if (sta->auth_alg == WLAN_AUTH_FT) {
 244                         status = wpa_ft_validate_reassoc(sta->wpa_sm, req_ies,
 245                                                          req_ies_len);
 246                         if (status != WLAN_STATUS_SUCCESS) {
 247                                 if (status == WLAN_STATUS_INVALID_PMKID)
 248                                         reason = WLAN_REASON_INVALID_IE;
 249                                 if (status == WLAN_STATUS_INVALID_MDIE)
 250                                         reason = WLAN_REASON_INVALID_IE;
 251                                 if (status == WLAN_STATUS_INVALID_FTIE)
 252                                         reason = WLAN_REASON_INVALID_IE;
 253                                 goto fail;
 254                         }
 255                 }
 256 #endif /* CONFIG_IEEE80211R */
 257         } else if (hapd->conf->wps_state) {
 258 #ifdef CONFIG_WPS
 259                 struct wpabuf *wps;
 260                 if (req_ies)
 261                         wps = ieee802_11_vendor_ie_concat(req_ies, req_ies_len,
 262                                                           WPS_IE_VENDOR_TYPE);
 263                 else
 264                         wps = NULL;
 265 #ifdef CONFIG_WPS_STRICT
 266                 if (wps && wps_validate_assoc_req(wps) < 0) {
 267                         reason = WLAN_REASON_INVALID_IE;
 268                         status = WLAN_STATUS_INVALID_IE;
 269                         wpabuf_free(wps);
 270                         goto fail;
 271                 }
 272 #endif /* CONFIG_WPS_STRICT */
 273                 if (wps) {
 274                         sta->flags |= WLAN_STA_WPS;
 275                         if (wps_is_20(wps)) {
 276                                 wpa_printf(MSG_DEBUG, "WPS: STA supports "
 277                                            "WPS 2.0");
 278                                 sta->flags |= WLAN_STA_WPS2;
 279                         }
 280                 } else
 281                         sta->flags |= WLAN_STA_MAYBE_WPS;
 282                 wpabuf_free(wps);
 283 #endif /* CONFIG_WPS */
 284         }
 285 #ifdef CONFIG_WPS
 286 skip_wpa_check:
 287 #endif /* CONFIG_WPS */
 288
 289 #ifdef CONFIG_IEEE80211R
 290         p = wpa_sm_write_assoc_resp_ies(sta->wpa_sm, buf, sizeof(buf),
 291                                         sta->auth_alg, req_ies, req_ies_len);
 292
 293         hostapd_sta_assoc(hapd, addr, reassoc, status, buf, p - buf);
 294 #else /* CONFIG_IEEE80211R */
 295         /* Keep compiler silent about unused variables */
 296         if (status) {
 297         }
 298 #endif /* CONFIG_IEEE80211R */
 299
 300         new_assoc = (sta->flags & WLAN_STA_ASSOC) == 0;
 301         sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
 302
 303         if (reassoc && (sta->auth_alg == WLAN_AUTH_FT))
 304                 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC_FT);
 305         else
 306                 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC);
 307
 308         hostapd_new_assoc_sta(hapd, sta, !new_assoc);
 309
 310         ieee802_1x_notify_port_enabled(sta->eapol_sm, 1);
 311
 312 #ifdef CONFIG_P2P
 313         if (req_ies) {
 314                 p2p_group_notif_assoc(hapd->p2p_group, sta->addr,
 315                                       req_ies, req_ies_len);
 316         }
 317 #endif /* CONFIG_P2P */
 318
 319         return 0;
 320
 321 fail:
 322 #ifdef CONFIG_IEEE80211R
 323         hostapd_sta_assoc(hapd, addr, reassoc, status, buf, p - buf);
 324 #endif /* CONFIG_IEEE80211R */
 325         hostapd_drv_sta_disassoc(hapd, sta->addr, reason);
 326         ap_free_sta(hapd, sta);
 327         return -1;
 328 }
 329
 330
 331 void hostapd_notif_disassoc(struct hostapd_data *hapd, const u8 *addr)
 332 {
 333         struct sta_info *sta;
 334
 335         if (addr == NULL) {
 336                 /*
 337                  * This could potentially happen with unexpected event from the
 338                  * driver wrapper. This was seen at least in one case where the
 339                  * driver ended up reporting a station mode event while hostapd
 340                  * was running, so better make sure we stop processing such an
 341                  * event here.
 342                  */
 343                 wpa_printf(MSG_DEBUG, "hostapd_notif_disassoc: Skip event "
 344                            "with no address");
 345                 return;
 346         }
 347
 348         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
 349                        HOSTAPD_LEVEL_INFO, "disassociated");
 350
 351         sta = ap_get_sta(hapd, addr);
 352         if (sta == NULL) {
 353                 wpa_printf(MSG_DEBUG, "Disassociation notification for "
 354                            "unknown STA " MACSTR, MAC2STR(addr));
 355                 return;
 356         }
 357
 358         ap_sta_set_authorized(hapd, sta, 0);
 359         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
 360         wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC);
 361         sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
 362         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
 363         ap_free_sta(hapd, sta);
 364 }
 365
 366
 367 void hostapd_event_sta_low_ack(struct hostapd_data *hapd, const u8 *addr)
 368 {
 369         struct sta_info *sta = ap_get_sta(hapd, addr);
 370
 371         if (!sta || !hapd->conf->disassoc_low_ack)
 372                 return;
 373
 374         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
 375                        HOSTAPD_LEVEL_INFO, "disconnected due to excessive "
 376                        "missing ACKs");
 377         hostapd_drv_sta_disassoc(hapd, addr, WLAN_REASON_DISASSOC_LOW_ACK);
 378         if (sta)
 379                 ap_sta_disassociate(hapd, sta, WLAN_REASON_DISASSOC_LOW_ACK);
 380 }
 381
 382
 383 void hostapd_event_ch_switch(struct hostapd_data *hapd, int freq, int ht,
 384                              int offset, int width, int cf1, int cf2)
 385 {
 386 #ifdef NEED_AP_MLME
 387         int channel, chwidth, seg0_idx = 0, seg1_idx = 0;
 388
 389         hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
 390                        HOSTAPD_LEVEL_INFO, "driver had channel switch: "
 391                        "freq=%d, ht=%d, offset=%d, width=%d, cf1=%d, cf2=%d",
 392                        freq, ht, offset, width, cf1, cf2);
 393
 394         hapd->iface->freq = freq;
 395
 396         channel = hostapd_hw_get_channel(hapd, freq);
 397         if (!channel) {
 398                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
 399                                HOSTAPD_LEVEL_WARNING, "driver switched to "
 400                                "bad channel!");
 401                 return;
 402         }
 403
 404         switch (width) {
 405         case CHAN_WIDTH_80:
 406                 chwidth = VHT_CHANWIDTH_80MHZ;
 407                 break;
 408         case CHAN_WIDTH_80P80:
 409                 chwidth = VHT_CHANWIDTH_80P80MHZ;
 410                 break;
 411         case CHAN_WIDTH_160:
 412                 chwidth = VHT_CHANWIDTH_160MHZ;
 413                 break;
 414         case CHAN_WIDTH_20_NOHT:
 415         case CHAN_WIDTH_20:
 416         case CHAN_WIDTH_40:
 417         default:
 418                 chwidth = VHT_CHANWIDTH_USE_HT;
 419                 break;
 420         }
 421
 422         switch (hapd->iface->current_mode->mode) {
 423         case HOSTAPD_MODE_IEEE80211A:
 424                 if (cf1 > 5000)
 425                         seg0_idx = (cf1 - 5000) / 5;
 426                 if (cf2 > 5000)
 427                         seg1_idx = (cf2 - 5000) / 5;
 428                 break;
 429         default:
 430                 seg0_idx = hostapd_hw_get_channel(hapd, cf1);
 431                 seg1_idx = hostapd_hw_get_channel(hapd, cf2);
 432                 break;
 433         }
 434
 435         hapd->iconf->channel = channel;
 436         hapd->iconf->ieee80211n = ht;
 437         hapd->iconf->secondary_channel = offset;
 438         hapd->iconf->vht_oper_chwidth = chwidth;
 439         hapd->iconf->vht_oper_centr_freq_seg0_idx = seg0_idx;
 440         hapd->iconf->vht_oper_centr_freq_seg1_idx = seg1_idx;
 441
 442         if (hapd->iface->csa_in_progress && freq == hapd->iface->cs_freq) {
 443                 hostapd_cleanup_cs_params(hapd);
 444
 445                 wpa_msg(hapd->msg_ctx, MSG_INFO, AP_CSA_FINISHED "freq=%d",
 446                         freq);
 447         }
 448 #endif /* NEED_AP_MLME */
 449 }
 450
 451
 452 void hostapd_event_connect_failed_reason(struct hostapd_data *hapd,
 453                                          const u8 *addr, int reason_code)
 454 {
 455         switch (reason_code) {
 456         case MAX_CLIENT_REACHED:
 457                 wpa_msg(hapd->msg_ctx, MSG_INFO, AP_REJECTED_MAX_STA MACSTR,
 458                         MAC2STR(addr));
 459                 break;
 460         case BLOCKED_CLIENT:
 461                 wpa_msg(hapd->msg_ctx, MSG_INFO, AP_REJECTED_BLOCKED_STA MACSTR,
 462                         MAC2STR(addr));
 463                 break;
 464         }
 465 }
 466
 467
 468 int hostapd_probe_req_rx(struct hostapd_data *hapd, const u8 *sa, const u8 *da,
 469                          const u8 *bssid, const u8 *ie, size_t ie_len,
 470                          int ssi_signal)
 471 {
 472         size_t i;
 473         int ret = 0;
 474
 475         if (sa == NULL || ie == NULL)
 476                 return -1;
 477
 478         random_add_randomness(sa, ETH_ALEN);
 479         for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++) {
 480                 if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx,
 481                                             sa, da, bssid, ie, ie_len,
 482                                             ssi_signal) > 0) {
 483                         ret = 1;
 484                         break;
 485                 }
 486         }
 487         return ret;
 488 }
 489
 490
 491 #ifdef HOSTAPD
 492
 493 #ifdef CONFIG_IEEE80211R
 494 static void hostapd_notify_auth_ft_finish(void *ctx, const u8 *dst,
 495                                           const u8 *bssid,
 496                                           u16 auth_transaction, u16 status,
 497                                           const u8 *ies, size_t ies_len)
 498 {
 499         struct hostapd_data *hapd = ctx;
 500         struct sta_info *sta;
 501
 502         sta = ap_get_sta(hapd, dst);
 503         if (sta == NULL)
 504                 return;
 505
 506         hostapd_logger(hapd, dst, HOSTAPD_MODULE_IEEE80211,
 507                        HOSTAPD_LEVEL_DEBUG, "authentication OK (FT)");
 508         sta->flags |= WLAN_STA_AUTH;
 509
 510         hostapd_sta_auth(hapd, dst, auth_transaction, status, ies, ies_len);
 511 }
 512 #endif /* CONFIG_IEEE80211R */
 513
 514
 515 static void hostapd_notif_auth(struct hostapd_data *hapd,
 516                                struct auth_info *rx_auth)
 517 {
 518         struct sta_info *sta;
 519         u16 status = WLAN_STATUS_SUCCESS;
 520         u8 resp_ies[2 + WLAN_AUTH_CHALLENGE_LEN];
 521         size_t resp_ies_len = 0;
 522
 523         sta = ap_get_sta(hapd, rx_auth->peer);
 524         if (!sta) {
 525                 sta = ap_sta_add(hapd, rx_auth->peer);
 526                 if (sta == NULL) {
 527                         status = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
 528                         goto fail;
 529                 }
 530         }
 531         sta->flags &= ~WLAN_STA_PREAUTH;
 532         ieee802_1x_notify_pre_auth(sta->eapol_sm, 0);
 533 #ifdef CONFIG_IEEE80211R
 534         if (rx_auth->auth_type == WLAN_AUTH_FT && hapd->wpa_auth) {
 535                 sta->auth_alg = WLAN_AUTH_FT;
 536                 if (sta->wpa_sm == NULL)
 537                         sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
 538                                                         sta->addr, NULL);
 539                 if (sta->wpa_sm == NULL) {
 540                         wpa_printf(MSG_DEBUG, "FT: Failed to initialize WPA "
 541                                    "state machine");
 542                         status = WLAN_STATUS_UNSPECIFIED_FAILURE;
 543                         goto fail;
 544                 }
 545                 wpa_ft_process_auth(sta->wpa_sm, rx_auth->bssid,
 546                                     rx_auth->auth_transaction, rx_auth->ies,
 547                                     rx_auth->ies_len,
 548                                     hostapd_notify_auth_ft_finish, hapd);
 549                 return;
 550         }
 551 #endif /* CONFIG_IEEE80211R */
 552 fail:
 553         hostapd_sta_auth(hapd, rx_auth->peer, rx_auth->auth_transaction + 1,
 554                          status, resp_ies, resp_ies_len);
 555 }
 556
 557
 558 static void hostapd_action_rx(struct hostapd_data *hapd,
 559                               struct rx_action *action)
 560 {
 561         struct sta_info *sta;
 562
 563         wpa_printf(MSG_DEBUG, "RX_ACTION cat %d action plen %d",
 564                    action->category, (int) action->len);
 565
 566         sta = ap_get_sta(hapd, action->sa);
 567         if (sta == NULL) {
 568                 wpa_printf(MSG_DEBUG, "%s: station not found", __func__);
 569                 return;
 570         }
 571 #ifdef CONFIG_IEEE80211R
 572         if (action->category == WLAN_ACTION_FT) {
 573                 wpa_printf(MSG_DEBUG, "%s: FT_ACTION length %d",
 574                            __func__, (int) action->len);
 575                 wpa_ft_action_rx(sta->wpa_sm, action->data, action->len);
 576         }
 577 #endif /* CONFIG_IEEE80211R */
 578 #ifdef CONFIG_IEEE80211W
 579         if (action->category == WLAN_ACTION_SA_QUERY && action->len >= 4) {
 580                 wpa_printf(MSG_DEBUG, "%s: SA_QUERY_ACTION length %d",
 581                            __func__, (int) action->len);
 582                 ieee802_11_sa_query_action(hapd, action->sa,
 583                                            *(action->data + 1),
 584                                            action->data + 2);
 585         }
 586 #endif /* CONFIG_IEEE80211W */
 587 #ifdef CONFIG_WNM
 588         if (action->category == WLAN_ACTION_WNM) {
 589                 wpa_printf(MSG_DEBUG, "%s: WNM_ACTION length %d",
 590                            __func__, (int) action->len);
 591                 ieee802_11_rx_wnm_action_ap(hapd, action);
 592         }
 593 #endif /* CONFIG_WNM */
 594 }
 595
 596
 597 #ifdef NEED_AP_MLME
 598
 599 #define HAPD_BROADCAST ((struct hostapd_data *) -1)
 600
 601 static struct hostapd_data * get_hapd_bssid(struct hostapd_iface *iface,
 602                                             const u8 *bssid)
 603 {
 604         size_t i;
 605
 606         if (bssid == NULL)
 607                 return NULL;
 608         if (bssid[0] == 0xff && bssid[1] == 0xff && bssid[2] == 0xff &&
 609             bssid[3] == 0xff && bssid[4] == 0xff && bssid[5] == 0xff)
 610                 return HAPD_BROADCAST;
 611
 612         for (i = 0; i < iface->num_bss; i++) {
 613                 if (os_memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0)
 614                         return iface->bss[i];
 615         }
 616
 617         return NULL;
 618 }
 619
 620
 621 static void hostapd_rx_from_unknown_sta(struct hostapd_data *hapd,
 622                                         const u8 *bssid, const u8 *addr,
 623                                         int wds)
 624 {
 625         hapd = get_hapd_bssid(hapd->iface, bssid);
 626         if (hapd == NULL || hapd == HAPD_BROADCAST)
 627                 return;
 628
 629         ieee802_11_rx_from_unknown(hapd, addr, wds);
 630 }
 631
 632
 633 static void hostapd_mgmt_rx(struct hostapd_data *hapd, struct rx_mgmt *rx_mgmt)
 634 {
 635         struct hostapd_iface *iface = hapd->iface;
 636         const struct ieee80211_hdr *hdr;
 637         const u8 *bssid;
 638         struct hostapd_frame_info fi;
 639
 640         hdr = (const struct ieee80211_hdr *) rx_mgmt->frame;
 641         bssid = get_hdr_bssid(hdr, rx_mgmt->frame_len);
 642         if (bssid == NULL)
 643                 return;
 644
 645         hapd = get_hapd_bssid(iface, bssid);
 646         if (hapd == NULL) {
 647                 u16 fc;
 648                 fc = le_to_host16(hdr->frame_control);
 649
 650                 /*
 651                  * Drop frames to unknown BSSIDs except for Beacon frames which
 652                  * could be used to update neighbor information.
 653                  */
 654                 if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
 655                     WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_BEACON)
 656                         hapd = iface->bss[0];
 657                 else
 658                         return;
 659         }
 660
 661         os_memset(&fi, 0, sizeof(fi));
 662         fi.datarate = rx_mgmt->datarate;
 663         fi.ssi_signal = rx_mgmt->ssi_signal;
 664
 665         if (hapd == HAPD_BROADCAST) {
 666                 size_t i;
 667                 for (i = 0; i < iface->num_bss; i++)
 668                         ieee802_11_mgmt(iface->bss[i], rx_mgmt->frame,
 669                                         rx_mgmt->frame_len, &fi);
 670         } else
 671                 ieee802_11_mgmt(hapd, rx_mgmt->frame, rx_mgmt->frame_len, &fi);
 672
 673         random_add_randomness(&fi, sizeof(fi));
 674 }
 675
 676
 677 static void hostapd_rx_action(struct hostapd_data *hapd,
 678                               struct rx_action *rx_action)
 679 {
 680         struct rx_mgmt rx_mgmt;
 681         u8 *buf;
 682         struct ieee80211_hdr *hdr;
 683
 684         wpa_printf(MSG_DEBUG, "EVENT_RX_ACTION DA=" MACSTR " SA=" MACSTR
 685                    " BSSID=" MACSTR " category=%u",
 686                    MAC2STR(rx_action->da), MAC2STR(rx_action->sa),
 687                    MAC2STR(rx_action->bssid), rx_action->category);
 688         wpa_hexdump(MSG_MSGDUMP, "Received action frame contents",
 689                     rx_action->data, rx_action->len);
 690
 691         buf = os_zalloc(24 + 1 + rx_action->len);
 692         if (buf == NULL)
 693                 return;
 694         hdr = (struct ieee80211_hdr *) buf;
 695         hdr->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 696                                           WLAN_FC_STYPE_ACTION);
 697         if (rx_action->category == WLAN_ACTION_SA_QUERY) {
 698                 /*
 699                  * Assume frame was protected; it would have been dropped if
 700                  * not.
 701                  */
 702                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
 703         }
 704         os_memcpy(hdr->addr1, rx_action->da, ETH_ALEN);
 705         os_memcpy(hdr->addr2, rx_action->sa, ETH_ALEN);
 706         os_memcpy(hdr->addr3, rx_action->bssid, ETH_ALEN);
 707         buf[24] = rx_action->category;
 708         os_memcpy(buf + 24 + 1, rx_action->data, rx_action->len);
 709         os_memset(&rx_mgmt, 0, sizeof(rx_mgmt));
 710         rx_mgmt.frame = buf;
 711         rx_mgmt.frame_len = 24 + 1 + rx_action->len;
 712         hostapd_mgmt_rx(hapd, &rx_mgmt);
 713         os_free(buf);
 714 }
 715
 716
 717 static void hostapd_mgmt_tx_cb(struct hostapd_data *hapd, const u8 *buf,
 718                                size_t len, u16 stype, int ok)
 719 {
 720         struct ieee80211_hdr *hdr;
 721         hdr = (struct ieee80211_hdr *) buf;
 722         hapd = get_hapd_bssid(hapd->iface, get_hdr_bssid(hdr, len));
 723         if (hapd == NULL || hapd == HAPD_BROADCAST)
 724                 return;
 725         ieee802_11_mgmt_cb(hapd, buf, len, stype, ok);
 726 }
 727
 728 #endif /* NEED_AP_MLME */
 729
 730
 731 static int hostapd_event_new_sta(struct hostapd_data *hapd, const u8 *addr)
 732 {
 733         struct sta_info *sta = ap_get_sta(hapd, addr);
 734         if (sta)
 735                 return 0;
 736
 737         wpa_printf(MSG_DEBUG, "Data frame from unknown STA " MACSTR
 738                    " - adding a new STA", MAC2STR(addr));
 739         sta = ap_sta_add(hapd, addr);
 740         if (sta) {
 741                 hostapd_new_assoc_sta(hapd, sta, 0);
 742         } else {
 743                 wpa_printf(MSG_DEBUG, "Failed to add STA entry for " MACSTR,
 744                            MAC2STR(addr));
 745                 return -1;
 746         }
 747
 748         return 0;
 749 }
 750
 751
 752 static void hostapd_event_eapol_rx(struct hostapd_data *hapd, const u8 *src,
 753                                    const u8 *data, size_t data_len)
 754 {
 755         struct hostapd_iface *iface = hapd->iface;
 756         struct sta_info *sta;
 757         size_t j;
 758
 759         for (j = 0; j < iface->num_bss; j++) {
 760                 if ((sta = ap_get_sta(iface->bss[j], src))) {
 761                         if (sta->flags & WLAN_STA_ASSOC) {
 762                                 hapd = iface->bss[j];
 763                                 break;
 764                         }
 765                 }
 766         }
 767
 768         ieee802_1x_receive(hapd, src, data, data_len);
 769 }
 770
 771
 772 static struct hostapd_channel_data * hostapd_get_mode_channel(
 773         struct hostapd_iface *iface, unsigned int freq)
 774 {
 775         int i;
 776         struct hostapd_channel_data *chan;
 777
 778         for (i = 0; i < iface->current_mode->num_channels; i++) {
 779                 chan = &iface->current_mode->channels[i];
 780                 if (!chan)
 781                         return NULL;
 782                 if ((unsigned int) chan->freq == freq)
 783                         return chan;
 784         }
 785
 786         return NULL;
 787 }
 788
 789
 790 static void hostapd_update_nf(struct hostapd_iface *iface,
 791                               struct hostapd_channel_data *chan,
 792                               struct freq_survey *survey)
 793 {
 794         if (!iface->chans_surveyed) {
 795                 chan->min_nf = survey->nf;
 796                 iface->lowest_nf = survey->nf;
 797         } else {
 798                 if (dl_list_empty(&chan->survey_list))
 799                         chan->min_nf = survey->nf;
 800                 else if (survey->nf < chan->min_nf)
 801                         chan->min_nf = survey->nf;
 802                 if (survey->nf < iface->lowest_nf)
 803                         iface->lowest_nf = survey->nf;
 804         }
 805 }
 806
 807
 808 static void hostapd_event_get_survey(struct hostapd_data *hapd,
 809                                      struct survey_results *survey_results)
 810 {
 811         struct hostapd_iface *iface = hapd->iface;
 812         struct freq_survey *survey, *tmp;
 813         struct hostapd_channel_data *chan;
 814
 815         if (dl_list_empty(&survey_results->survey_list)) {
 816                 wpa_printf(MSG_DEBUG, "No survey data received");
 817                 return;
 818         }
 819
 820         dl_list_for_each_safe(survey, tmp, &survey_results->survey_list,
 821                               struct freq_survey, list) {
 822                 chan = hostapd_get_mode_channel(iface, survey->freq);
 823                 if (!chan)
 824                         continue;
 825                 if (chan->flag & HOSTAPD_CHAN_DISABLED)
 826                         continue;
 827
 828                 dl_list_del(&survey->list);
 829                 dl_list_add_tail(&chan->survey_list, &survey->list);
 830
 831                 hostapd_update_nf(iface, chan, survey);
 832
 833                 iface->chans_surveyed++;
 834         }
 835 }
 836
 837
 838 #ifdef NEED_AP_MLME
 839
 840 static void hostapd_event_dfs_radar_detected(struct hostapd_data *hapd,
 841                                              struct dfs_event *radar)
 842 {
 843         wpa_printf(MSG_DEBUG, "DFS radar detected on %d MHz", radar->freq);
 844         hostapd_dfs_radar_detected(hapd->iface, radar->freq, radar->ht_enabled,
 845                                    radar->chan_offset, radar->chan_width,
 846                                    radar->cf1, radar->cf2);
 847 }
 848
 849
 850 static void hostapd_event_dfs_cac_finished(struct hostapd_data *hapd,
 851                                            struct dfs_event *radar)
 852 {
 853         wpa_printf(MSG_DEBUG, "DFS CAC finished on %d MHz", radar->freq);
 854         hostapd_dfs_complete_cac(hapd->iface, 1, radar->freq, radar->ht_enabled,
 855                                  radar->chan_offset, radar->chan_width,
 856                                  radar->cf1, radar->cf2);
 857 }
 858
 859
 860 static void hostapd_event_dfs_cac_aborted(struct hostapd_data *hapd,
 861                                           struct dfs_event *radar)
 862 {
 863         wpa_printf(MSG_DEBUG, "DFS CAC aborted on %d MHz", radar->freq);
 864         hostapd_dfs_complete_cac(hapd->iface, 0, radar->freq, radar->ht_enabled,
 865                                  radar->chan_offset, radar->chan_width,
 866                                  radar->cf1, radar->cf2);
 867 }
 868
 869
 870 static void hostapd_event_dfs_nop_finished(struct hostapd_data *hapd,
 871                                            struct dfs_event *radar)
 872 {
 873         wpa_printf(MSG_DEBUG, "DFS NOP finished on %d MHz", radar->freq);
 874         hostapd_dfs_nop_finished(hapd->iface, radar->freq, radar->ht_enabled,
 875                                  radar->chan_offset, radar->chan_width,
 876                                  radar->cf1, radar->cf2);
 877 }
 878
 879 #endif /* NEED_AP_MLME */
 880
 881
 882 void wpa_supplicant_event(void *ctx, enum wpa_event_type event,
 883                           union wpa_event_data *data)
 884 {
 885         struct hostapd_data *hapd = ctx;
 886 #ifndef CONFIG_NO_STDOUT_DEBUG
 887         int level = MSG_DEBUG;
 888
 889         if (event == EVENT_RX_MGMT && data->rx_mgmt.frame &&
 890             data->rx_mgmt.frame_len >= 24) {
 891                 const struct ieee80211_hdr *hdr;
 892                 u16 fc;
 893                 hdr = (const struct ieee80211_hdr *) data->rx_mgmt.frame;
 894                 fc = le_to_host16(hdr->frame_control);
 895                 if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
 896                     WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_BEACON)
 897                         level = MSG_EXCESSIVE;
 898                 if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
 899                     WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_PROBE_REQ)
 900                         level = MSG_EXCESSIVE;
 901         }
 902
 903         wpa_dbg(hapd->msg_ctx, level, "Event %s (%d) received",
 904                 event_to_string(event), event);
 905 #endif /* CONFIG_NO_STDOUT_DEBUG */
 906
 907         switch (event) {
 908         case EVENT_MICHAEL_MIC_FAILURE:
 909                 michael_mic_failure(hapd, data->michael_mic_failure.src, 1);
 910                 break;
 911         case EVENT_SCAN_RESULTS:
 912                 if (hapd->iface->scan_cb)
 913                         hapd->iface->scan_cb(hapd->iface);
 914                 break;
 915 #ifdef CONFIG_IEEE80211R
 916         case EVENT_FT_RRB_RX:
 917                 wpa_ft_rrb_rx(hapd->wpa_auth, data->ft_rrb_rx.src,
 918                               data->ft_rrb_rx.data, data->ft_rrb_rx.data_len);
 919                 break;
 920 #endif /* CONFIG_IEEE80211R */
 921         case EVENT_WPS_BUTTON_PUSHED:
 922                 hostapd_wps_button_pushed(hapd, NULL);
 923                 break;
 924 #ifdef NEED_AP_MLME
 925         case EVENT_TX_STATUS:
 926                 switch (data->tx_status.type) {
 927                 case WLAN_FC_TYPE_MGMT:
 928                         hostapd_mgmt_tx_cb(hapd, data->tx_status.data,
 929                                            data->tx_status.data_len,
 930                                            data->tx_status.stype,
 931                                            data->tx_status.ack);
 932                         break;
 933                 case WLAN_FC_TYPE_DATA:
 934                         hostapd_tx_status(hapd, data->tx_status.dst,
 935                                           data->tx_status.data,
 936                                           data->tx_status.data_len,
 937                                           data->tx_status.ack);
 938                         break;
 939                 }
 940                 break;
 941         case EVENT_EAPOL_TX_STATUS:
 942                 hostapd_eapol_tx_status(hapd, data->eapol_tx_status.dst,
 943                                         data->eapol_tx_status.data,
 944                                         data->eapol_tx_status.data_len,
 945                                         data->eapol_tx_status.ack);
 946                 break;
 947         case EVENT_DRIVER_CLIENT_POLL_OK:
 948                 hostapd_client_poll_ok(hapd, data->client_poll.addr);
 949                 break;
 950         case EVENT_RX_FROM_UNKNOWN:
 951                 hostapd_rx_from_unknown_sta(hapd, data->rx_from_unknown.bssid,
 952                                             data->rx_from_unknown.addr,
 953                                             data->rx_from_unknown.wds);
 954                 break;
 955         case EVENT_RX_MGMT:
 956                 hostapd_mgmt_rx(hapd, &data->rx_mgmt);
 957                 break;
 958 #endif /* NEED_AP_MLME */
 959         case EVENT_RX_PROBE_REQ:
 960                 if (data->rx_probe_req.sa == NULL ||
 961                     data->rx_probe_req.ie == NULL)
 962                         break;
 963                 hostapd_probe_req_rx(hapd, data->rx_probe_req.sa,
 964                                      data->rx_probe_req.da,
 965                                      data->rx_probe_req.bssid,
 966                                      data->rx_probe_req.ie,
 967                                      data->rx_probe_req.ie_len,
 968                                      data->rx_probe_req.ssi_signal);
 969                 break;
 970         case EVENT_NEW_STA:
 971                 hostapd_event_new_sta(hapd, data->new_sta.addr);
 972                 break;
 973         case EVENT_EAPOL_RX:
 974                 hostapd_event_eapol_rx(hapd, data->eapol_rx.src,
 975                                        data->eapol_rx.data,
 976                                        data->eapol_rx.data_len);
 977                 break;
 978         case EVENT_ASSOC:
 979                 hostapd_notif_assoc(hapd, data->assoc_info.addr,
 980                                     data->assoc_info.req_ies,
 981                                     data->assoc_info.req_ies_len,
 982                                     data->assoc_info.reassoc);
 983                 break;
 984         case EVENT_DISASSOC:
 985                 if (data)
 986                         hostapd_notif_disassoc(hapd, data->disassoc_info.addr);
 987                 break;
 988         case EVENT_DEAUTH:
 989                 if (data)
 990                         hostapd_notif_disassoc(hapd, data->deauth_info.addr);
 991                 break;
 992         case EVENT_STATION_LOW_ACK:
 993                 if (!data)
 994                         break;
 995                 hostapd_event_sta_low_ack(hapd, data->low_ack.addr);
 996                 break;
 997         case EVENT_RX_ACTION:
 998                 if (data->rx_action.da == NULL || data->rx_action.sa == NULL ||
 999                     data->rx_action.bssid == NULL)
1000                         break;
1001 #ifdef NEED_AP_MLME
1002                 hostapd_rx_action(hapd, &data->rx_action);
1003 #endif /* NEED_AP_MLME */
1004                 hostapd_action_rx(hapd, &data->rx_action);
1005                 break;
1006         case EVENT_AUTH:
1007                 hostapd_notif_auth(hapd, &data->auth);
1008                 break;
1009         case EVENT_CH_SWITCH:
1010                 if (!data)
1011                         break;
1012                 hostapd_event_ch_switch(hapd, data->ch_switch.freq,
1013                                         data->ch_switch.ht_enabled,
1014                                         data->ch_switch.ch_offset,
1015                                         data->ch_switch.ch_width,
1016                                         data->ch_switch.cf1,
1017                                         data->ch_switch.cf2);
1018                 break;
1019         case EVENT_CONNECT_FAILED_REASON:
1020                 if (!data)
1021                         break;
1022                 hostapd_event_connect_failed_reason(
1023                         hapd, data->connect_failed_reason.addr,
1024                         data->connect_failed_reason.code);
1025                 break;
1026         case EVENT_SURVEY:
1027                 hostapd_event_get_survey(hapd, &data->survey_results);
1028                 break;
1029 #ifdef NEED_AP_MLME
1030         case EVENT_DFS_RADAR_DETECTED:
1031                 if (!data)
1032                         break;
1033                 hostapd_event_dfs_radar_detected(hapd, &data->dfs_event);
1034                 break;
1035         case EVENT_DFS_CAC_FINISHED:
1036                 if (!data)
1037                         break;
1038                 hostapd_event_dfs_cac_finished(hapd, &data->dfs_event);
1039                 break;
1040         case EVENT_DFS_CAC_ABORTED:
1041                 if (!data)
1042                         break;
1043                 hostapd_event_dfs_cac_aborted(hapd, &data->dfs_event);
1044                 break;
1045         case EVENT_DFS_NOP_FINISHED:
1046                 if (!data)
1047                         break;
1048                 hostapd_event_dfs_nop_finished(hapd, &data->dfs_event);
1049                 break;
1050         case EVENT_CHANNEL_LIST_CHANGED:
1051                 /* channel list changed (regulatory?), update channel list */
1052                 /* TODO: check this. hostapd_get_hw_features() initializes
1053                  * too much stuff. */
1054                 /* hostapd_get_hw_features(hapd->iface); */
1055                 hostapd_channel_list_updated(
1056                         hapd->iface, data->channel_list_changed.initiator);
1057                 break;
1058 #endif /* NEED_AP_MLME */
1059         default:
1060                 wpa_printf(MSG_DEBUG, "Unknown event %d", event);
1061                 break;
1062         }
1063 }
1064
1065 #endif /* HOSTAPD */