1 /* 2 * hostapd / IEEE 802.11 Management: Beacon and Probe Request/Response 3 * Copyright (c) 2002-2004, Instant802 Networks, Inc. 4 * Copyright (c) 2005-2006, Devicescape Software, Inc. 5 * Copyright (c) 2008-2012, Jouni Malinen <j (at) w1.fi> 6 * 7 * This software may be distributed under the terms of the BSD license. 8 * See README for more details. 9 */ 10 11 #include "utils/includes.h" 12 13 #ifndef CONFIG_NATIVE_WINDOWS 14 15 #include "utils/common.h" 16 #include "common/ieee802_11_defs.h" 17 #include "common/ieee802_11_common.h" 18 #include "common/hw_features_common.h" 19 #include "wps/wps_defs.h" 20 #include "p2p/p2p.h" 21 #include "hostapd.h" 22 #include "ieee802_11.h" 23 #include "wpa_auth.h" 24 #include "wmm.h" 25 #include "ap_config.h" 26 #include "sta_info.h" 27 #include "p2p_hostapd.h" 28 #include "ap_drv_ops.h" 29 #include "beacon.h" 30 #include "hs20.h" 31 #include "dfs.h" 32 33 34 #ifdef NEED_AP_MLME 35 36 static u8 * hostapd_eid_rm_enabled_capab(struct hostapd_data *hapd, u8 *eid, 37 size_t len) 38 { 39 if (!hapd->conf->radio_measurements || len < 2 + 4) 40 return eid; 41 42 *eid++ = WLAN_EID_RRM_ENABLED_CAPABILITIES; 43 *eid++ = 5; 44 *eid++ = (hapd->conf->radio_measurements & BIT(0)) ? 45 WLAN_RRM_CAPS_NEIGHBOR_REPORT : 0x00; 46 *eid++ = 0x00; 47 *eid++ = 0x00; 48 *eid++ = 0x00; 49 *eid++ = 0x00; 50 return eid; 51 } 52 53 54 static u8 * hostapd_eid_bss_load(struct hostapd_data *hapd, u8 *eid, size_t len) 55 { 56 if (len < 2 + 5) 57 return eid; 58 59 #ifdef CONFIG_TESTING_OPTIONS 60 if (hapd->conf->bss_load_test_set) { 61 *eid++ = WLAN_EID_BSS_LOAD; 62 *eid++ = 5; 63 os_memcpy(eid, hapd->conf->bss_load_test, 5); 64 eid += 5; 65 return eid; 66 } 67 #endif /* CONFIG_TESTING_OPTIONS */ 68 if (hapd->conf->bss_load_update_period) { 69 *eid++ = WLAN_EID_BSS_LOAD; 70 *eid++ = 5; 71 WPA_PUT_LE16(eid, hapd->num_sta); 72 eid += 2; 73 *eid++ = hapd->iface->channel_utilization; 74 WPA_PUT_LE16(eid, 0); /* no available admission capabity */ 75 eid += 2; 76 } 77 return eid; 78 } 79 80 81 static u8 ieee802_11_erp_info(struct hostapd_data *hapd) 82 { 83 u8 erp = 0; 84 85 if (hapd->iface->current_mode == NULL || 86 hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G) 87 return 0; 88 89 if (hapd->iface->olbc) 90 erp |= ERP_INFO_USE_PROTECTION; 91 if (hapd->iface->num_sta_non_erp > 0) { 92 erp |= ERP_INFO_NON_ERP_PRESENT | 93 ERP_INFO_USE_PROTECTION; 94 } 95 if (hapd->iface->num_sta_no_short_preamble > 0 || 96 hapd->iconf->preamble == LONG_PREAMBLE) 97 erp |= ERP_INFO_BARKER_PREAMBLE_MODE; 98 99 return erp; 100 } 101 102 103 static u8 * hostapd_eid_ds_params(struct hostapd_data *hapd, u8 *eid) 104 { 105 *eid++ = WLAN_EID_DS_PARAMS; 106 *eid++ = 1; 107 *eid++ = hapd->iconf->channel; 108 return eid; 109 } 110 111 112 static u8 * hostapd_eid_erp_info(struct hostapd_data *hapd, u8 *eid) 113 { 114 if (hapd->iface->current_mode == NULL || 115 hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G) 116 return eid; 117 118 /* Set NonERP_present and use_protection bits if there 119 * are any associated NonERP stations. */ 120 /* TODO: use_protection bit can be set to zero even if 121 * there are NonERP stations present. This optimization 122 * might be useful if NonERP stations are "quiet". 123 * See 802.11g/D6 E-1 for recommended practice. 124 * In addition, Non ERP present might be set, if AP detects Non ERP 125 * operation on other APs. */ 126 127 /* Add ERP Information element */ 128 *eid++ = WLAN_EID_ERP_INFO; 129 *eid++ = 1; 130 *eid++ = ieee802_11_erp_info(hapd); 131 132 return eid; 133 } 134 135 136 static u8 * hostapd_eid_pwr_constraint(struct hostapd_data *hapd, u8 *eid) 137 { 138 u8 *pos = eid; 139 u8 local_pwr_constraint = 0; 140 int dfs; 141 142 if (hapd->iface->current_mode == NULL || 143 hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211A) 144 return eid; 145 146 /* Let host drivers add this IE if DFS support is offloaded */ 147 if (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_DFS_OFFLOAD) 148 return eid; 149 150 /* 151 * There is no DFS support and power constraint was not directly 152 * requested by config option. 153 */ 154 if (!hapd->iconf->ieee80211h && 155 hapd->iconf->local_pwr_constraint == -1) 156 return eid; 157 158 /* Check if DFS is required by regulatory. */ 159 dfs = hostapd_is_dfs_required(hapd->iface); 160 if (dfs < 0) { 161 wpa_printf(MSG_WARNING, "Failed to check if DFS is required; ret=%d", 162 dfs); 163 dfs = 0; 164 } 165 166 if (dfs == 0 && hapd->iconf->local_pwr_constraint == -1) 167 return eid; 168 169 /* 170 * ieee80211h (DFS) is enabled so Power Constraint element shall 171 * be added when running on DFS channel whenever local_pwr_constraint 172 * is configured or not. In order to meet regulations when TPC is not 173 * implemented using a transmit power that is below the legal maximum 174 * (including any mitigation factor) should help. In this case, 175 * indicate 3 dB below maximum allowed transmit power. 176 */ 177 if (hapd->iconf->local_pwr_constraint == -1) 178 local_pwr_constraint = 3; 179 180 /* 181 * A STA that is not an AP shall use a transmit power less than or 182 * equal to the local maximum transmit power level for the channel. 183 * The local maximum transmit power can be calculated from the formula: 184 * local max TX pwr = max TX pwr - local pwr constraint 185 * Where max TX pwr is maximum transmit power level specified for 186 * channel in Country element and local pwr constraint is specified 187 * for channel in this Power Constraint element. 188 */ 189 190 /* Element ID */ 191 *pos++ = WLAN_EID_PWR_CONSTRAINT; 192 /* Length */ 193 *pos++ = 1; 194 /* Local Power Constraint */ 195 if (local_pwr_constraint) 196 *pos++ = local_pwr_constraint; 197 else 198 *pos++ = hapd->iconf->local_pwr_constraint; 199 200 return pos; 201 } 202 203 204 static u8 * hostapd_eid_country_add(u8 *pos, u8 *end, int chan_spacing, 205 struct hostapd_channel_data *start, 206 struct hostapd_channel_data *prev) 207 { 208 if (end - pos < 3) 209 return pos; 210 211 /* first channel number */ 212 *pos++ = start->chan; 213 /* number of channels */ 214 *pos++ = (prev->chan - start->chan) / chan_spacing + 1; 215 /* maximum transmit power level */ 216 *pos++ = start->max_tx_power; 217 218 return pos; 219 } 220 221 222 static u8 * hostapd_eid_country(struct hostapd_data *hapd, u8 *eid, 223 int max_len) 224 { 225 u8 *pos = eid; 226 u8 *end = eid + max_len; 227 int i; 228 struct hostapd_hw_modes *mode; 229 struct hostapd_channel_data *start, *prev; 230 int chan_spacing = 1; 231 232 if (!hapd->iconf->ieee80211d || max_len < 6 || 233 hapd->iface->current_mode == NULL) 234 return eid; 235 236 *pos++ = WLAN_EID_COUNTRY; 237 pos++; /* length will be set later */ 238 os_memcpy(pos, hapd->iconf->country, 3); /* e.g., 'US ' */ 239 pos += 3; 240 241 mode = hapd->iface->current_mode; 242 if (mode->mode == HOSTAPD_MODE_IEEE80211A) 243 chan_spacing = 4; 244 245 start = prev = NULL; 246 for (i = 0; i < mode->num_channels; i++) { 247 struct hostapd_channel_data *chan = &mode->channels[i]; 248 if (chan->flag & HOSTAPD_CHAN_DISABLED) 249 continue; 250 if (start && prev && 251 prev->chan + chan_spacing == chan->chan && 252 start->max_tx_power == chan->max_tx_power) { 253 prev = chan; 254 continue; /* can use same entry */ 255 } 256 257 if (start && prev) { 258 pos = hostapd_eid_country_add(pos, end, chan_spacing, 259 start, prev); 260 start = NULL; 261 } 262 263 /* Start new group */ 264 start = prev = chan; 265 } 266 267 if (start) { 268 pos = hostapd_eid_country_add(pos, end, chan_spacing, 269 start, prev); 270 } 271 272 if ((pos - eid) & 1) { 273 if (end - pos < 1) 274 return eid; 275 *pos++ = 0; /* pad for 16-bit alignment */ 276 } 277 278 eid[1] = (pos - eid) - 2; 279 280 return pos; 281 } 282 283 284 static u8 * hostapd_eid_wpa(struct hostapd_data *hapd, u8 *eid, size_t len) 285 { 286 const u8 *ie; 287 size_t ielen; 288 289 ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &ielen); 290 if (ie == NULL || ielen > len) 291 return eid; 292 293 os_memcpy(eid, ie, ielen); 294 return eid + ielen; 295 } 296 297 298 static u8 * hostapd_eid_csa(struct hostapd_data *hapd, u8 *eid) 299 { 300 #ifdef CONFIG_TESTING_OPTIONS 301 if (hapd->iface->cs_oper_class && hapd->iconf->ecsa_ie_only) 302 return eid; 303 #endif /* CONFIG_TESTING_OPTIONS */ 304 305 if (!hapd->cs_freq_params.channel) 306 return eid; 307 308 *eid++ = WLAN_EID_CHANNEL_SWITCH; 309 *eid++ = 3; 310 *eid++ = hapd->cs_block_tx; 311 *eid++ = hapd->cs_freq_params.channel; 312 *eid++ = hapd->cs_count; 313 314 return eid; 315 } 316 317 318 static u8 * hostapd_eid_ecsa(struct hostapd_data *hapd, u8 *eid) 319 { 320 if (!hapd->cs_freq_params.channel || !hapd->iface->cs_oper_class) 321 return eid; 322 323 *eid++ = WLAN_EID_EXT_CHANSWITCH_ANN; 324 *eid++ = 4; 325 *eid++ = hapd->cs_block_tx; 326 *eid++ = hapd->iface->cs_oper_class; 327 *eid++ = hapd->cs_freq_params.channel; 328 *eid++ = hapd->cs_count; 329 330 return eid; 331 } 332 333 334 static u8 * hostapd_eid_supported_op_classes(struct hostapd_data *hapd, u8 *eid) 335 { 336 u8 op_class, channel; 337 338 if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_AP_CSA) || 339 !hapd->iface->freq) 340 return eid; 341 342 if (ieee80211_freq_to_channel_ext(hapd->iface->freq, 343 hapd->iconf->secondary_channel, 344 hapd->iconf->vht_oper_chwidth, 345 &op_class, &channel) == 346 NUM_HOSTAPD_MODES) 347 return eid; 348 349 *eid++ = WLAN_EID_SUPPORTED_OPERATING_CLASSES; 350 *eid++ = 2; 351 352 /* Current Operating Class */ 353 *eid++ = op_class; 354 355 /* TODO: Advertise all the supported operating classes */ 356 *eid++ = 0; 357 358 return eid; 359 } 360 361 362 static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd, 363 const struct ieee80211_mgmt *req, 364 int is_p2p, size_t *resp_len) 365 { 366 struct ieee80211_mgmt *resp; 367 u8 *pos, *epos, *csa_pos; 368 size_t buflen; 369 370 #define MAX_PROBERESP_LEN 768 371 buflen = MAX_PROBERESP_LEN; 372 #ifdef CONFIG_WPS 373 if (hapd->wps_probe_resp_ie) 374 buflen += wpabuf_len(hapd->wps_probe_resp_ie); 375 #endif /* CONFIG_WPS */ 376 #ifdef CONFIG_P2P 377 if (hapd->p2p_probe_resp_ie) 378 buflen += wpabuf_len(hapd->p2p_probe_resp_ie); 379 #endif /* CONFIG_P2P */ 380 #ifdef CONFIG_FST 381 if (hapd->iface->fst_ies) 382 buflen += wpabuf_len(hapd->iface->fst_ies); 383 #endif /* CONFIG_FST */ 384 if (hapd->conf->vendor_elements) 385 buflen += wpabuf_len(hapd->conf->vendor_elements); 386 if (hapd->conf->vendor_vht) { 387 buflen += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) + 388 2 + sizeof(struct ieee80211_vht_operation); 389 } 390 391 buflen += hostapd_mbo_ie_len(hapd); 392 393 resp = os_zalloc(buflen); 394 if (resp == NULL) 395 return NULL; 396 397 epos = ((u8 *) resp) + MAX_PROBERESP_LEN; 398 399 resp->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 400 WLAN_FC_STYPE_PROBE_RESP); 401 if (req) 402 os_memcpy(resp->da, req->sa, ETH_ALEN); 403 os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN); 404 405 os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN); 406 resp->u.probe_resp.beacon_int = 407 host_to_le16(hapd->iconf->beacon_int); 408 409 /* hardware or low-level driver will setup seq_ctrl and timestamp */ 410 resp->u.probe_resp.capab_info = 411 host_to_le16(hostapd_own_capab_info(hapd)); 412 413 pos = resp->u.probe_resp.variable; 414 *pos++ = WLAN_EID_SSID; 415 *pos++ = hapd->conf->ssid.ssid_len; 416 os_memcpy(pos, hapd->conf->ssid.ssid, hapd->conf->ssid.ssid_len); 417 pos += hapd->conf->ssid.ssid_len; 418 419 /* Supported rates */ 420 pos = hostapd_eid_supp_rates(hapd, pos); 421 422 /* DS Params */ 423 pos = hostapd_eid_ds_params(hapd, pos); 424 425 pos = hostapd_eid_country(hapd, pos, epos - pos); 426 427 /* Power Constraint element */ 428 pos = hostapd_eid_pwr_constraint(hapd, pos); 429 430 /* CSA IE */ 431 csa_pos = hostapd_eid_csa(hapd, pos); 432 if (csa_pos != pos) 433 hapd->cs_c_off_proberesp = csa_pos - (u8 *) resp - 1; 434 pos = csa_pos; 435 436 /* ERP Information element */ 437 pos = hostapd_eid_erp_info(hapd, pos); 438 439 /* Extended supported rates */ 440 pos = hostapd_eid_ext_supp_rates(hapd, pos); 441 442 /* RSN, MDIE, WPA */ 443 pos = hostapd_eid_wpa(hapd, pos, epos - pos); 444 445 pos = hostapd_eid_bss_load(hapd, pos, epos - pos); 446 447 pos = hostapd_eid_rm_enabled_capab(hapd, pos, epos - pos); 448 449 /* eCSA IE */ 450 csa_pos = hostapd_eid_ecsa(hapd, pos); 451 if (csa_pos != pos) 452 hapd->cs_c_off_ecsa_proberesp = csa_pos - (u8 *) resp - 1; 453 pos = csa_pos; 454 455 pos = hostapd_eid_supported_op_classes(hapd, pos); 456 457 #ifdef CONFIG_IEEE80211N 458 /* Secondary Channel Offset element */ 459 /* TODO: The standard doesn't specify a position for this element. */ 460 pos = hostapd_eid_secondary_channel(hapd, pos); 461 462 pos = hostapd_eid_ht_capabilities(hapd, pos); 463 pos = hostapd_eid_ht_operation(hapd, pos); 464 #endif /* CONFIG_IEEE80211N */ 465 466 pos = hostapd_eid_ext_capab(hapd, pos); 467 468 pos = hostapd_eid_time_adv(hapd, pos); 469 pos = hostapd_eid_time_zone(hapd, pos); 470 471 pos = hostapd_eid_interworking(hapd, pos); 472 pos = hostapd_eid_adv_proto(hapd, pos); 473 pos = hostapd_eid_roaming_consortium(hapd, pos); 474 475 #ifdef CONFIG_FST 476 if (hapd->iface->fst_ies) { 477 os_memcpy(pos, wpabuf_head(hapd->iface->fst_ies), 478 wpabuf_len(hapd->iface->fst_ies)); 479 pos += wpabuf_len(hapd->iface->fst_ies); 480 } 481 #endif /* CONFIG_FST */ 482 483 #ifdef CONFIG_IEEE80211AC 484 if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) { 485 pos = hostapd_eid_vht_capabilities(hapd, pos); 486 pos = hostapd_eid_vht_operation(hapd, pos); 487 pos = hostapd_eid_txpower_envelope(hapd, pos); 488 pos = hostapd_eid_wb_chsw_wrapper(hapd, pos); 489 } 490 if (hapd->conf->vendor_vht) 491 pos = hostapd_eid_vendor_vht(hapd, pos); 492 #endif /* CONFIG_IEEE80211AC */ 493 494 /* Wi-Fi Alliance WMM */ 495 pos = hostapd_eid_wmm(hapd, pos); 496 497 #ifdef CONFIG_WPS 498 if (hapd->conf->wps_state && hapd->wps_probe_resp_ie) { 499 os_memcpy(pos, wpabuf_head(hapd->wps_probe_resp_ie), 500 wpabuf_len(hapd->wps_probe_resp_ie)); 501 pos += wpabuf_len(hapd->wps_probe_resp_ie); 502 } 503 #endif /* CONFIG_WPS */ 504 505 #ifdef CONFIG_P2P 506 if ((hapd->conf->p2p & P2P_ENABLED) && is_p2p && 507 hapd->p2p_probe_resp_ie) { 508 os_memcpy(pos, wpabuf_head(hapd->p2p_probe_resp_ie), 509 wpabuf_len(hapd->p2p_probe_resp_ie)); 510 pos += wpabuf_len(hapd->p2p_probe_resp_ie); 511 } 512 #endif /* CONFIG_P2P */ 513 #ifdef CONFIG_P2P_MANAGER 514 if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) == 515 P2P_MANAGE) 516 pos = hostapd_eid_p2p_manage(hapd, pos); 517 #endif /* CONFIG_P2P_MANAGER */ 518 519 #ifdef CONFIG_HS20 520 pos = hostapd_eid_hs20_indication(hapd, pos); 521 pos = hostapd_eid_osen(hapd, pos); 522 #endif /* CONFIG_HS20 */ 523 524 pos = hostapd_eid_mbo(hapd, pos, (u8 *) resp + buflen - pos); 525 526 if (hapd->conf->vendor_elements) { 527 os_memcpy(pos, wpabuf_head(hapd->conf->vendor_elements), 528 wpabuf_len(hapd->conf->vendor_elements)); 529 pos += wpabuf_len(hapd->conf->vendor_elements); 530 } 531 532 *resp_len = pos - (u8 *) resp; 533 return (u8 *) resp; 534 } 535 536 537 enum ssid_match_result { 538 NO_SSID_MATCH, 539 EXACT_SSID_MATCH, 540 WILDCARD_SSID_MATCH 541 }; 542 543 static enum ssid_match_result ssid_match(struct hostapd_data *hapd, 544 const u8 *ssid, size_t ssid_len, 545 const u8 *ssid_list, 546 size_t ssid_list_len) 547 { 548 const u8 *pos, *end; 549 int wildcard = 0; 550 551 if (ssid_len == 0) 552 wildcard = 1; 553 if (ssid_len == hapd->conf->ssid.ssid_len && 554 os_memcmp(ssid, hapd->conf->ssid.ssid, ssid_len) == 0) 555 return EXACT_SSID_MATCH; 556 557 if (ssid_list == NULL) 558 return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH; 559 560 pos = ssid_list; 561 end = ssid_list + ssid_list_len; 562 while (end - pos >= 1) { 563 if (2 + pos[1] > end - pos) 564 break; 565 if (pos[1] == 0) 566 wildcard = 1; 567 if (pos[1] == hapd->conf->ssid.ssid_len && 568 os_memcmp(pos + 2, hapd->conf->ssid.ssid, pos[1]) == 0) 569 return EXACT_SSID_MATCH; 570 pos += 2 + pos[1]; 571 } 572 573 return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH; 574 } 575 576 577 void sta_track_expire(struct hostapd_iface *iface, int force) 578 { 579 struct os_reltime now; 580 struct hostapd_sta_info *info; 581 582 if (!iface->num_sta_seen) 583 return; 584 585 os_get_reltime(&now); 586 while ((info = dl_list_first(&iface->sta_seen, struct hostapd_sta_info, 587 list))) { 588 if (!force && 589 !os_reltime_expired(&now, &info->last_seen, 590 iface->conf->track_sta_max_age)) 591 break; 592 force = 0; 593 594 wpa_printf(MSG_MSGDUMP, "%s: Expire STA tracking entry for " 595 MACSTR, iface->bss[0]->conf->iface, 596 MAC2STR(info->addr)); 597 dl_list_del(&info->list); 598 iface->num_sta_seen--; 599 os_free(info); 600 } 601 } 602 603 604 static struct hostapd_sta_info * sta_track_get(struct hostapd_iface *iface, 605 const u8 *addr) 606 { 607 struct hostapd_sta_info *info; 608 609 dl_list_for_each(info, &iface->sta_seen, struct hostapd_sta_info, list) 610 if (os_memcmp(addr, info->addr, ETH_ALEN) == 0) 611 return info; 612 613 return NULL; 614 } 615 616 617 void sta_track_add(struct hostapd_iface *iface, const u8 *addr) 618 { 619 struct hostapd_sta_info *info; 620 621 info = sta_track_get(iface, addr); 622 if (info) { 623 /* Move the most recent entry to the end of the list */ 624 dl_list_del(&info->list); 625 dl_list_add_tail(&iface->sta_seen, &info->list); 626 os_get_reltime(&info->last_seen); 627 return; 628 } 629 630 /* Add a new entry */ 631 info = os_zalloc(sizeof(*info)); 632 os_memcpy(info->addr, addr, ETH_ALEN); 633 os_get_reltime(&info->last_seen); 634 635 if (iface->num_sta_seen >= iface->conf->track_sta_max_num) { 636 /* Expire oldest entry to make room for a new one */ 637 sta_track_expire(iface, 1); 638 } 639 640 wpa_printf(MSG_MSGDUMP, "%s: Add STA tracking entry for " 641 MACSTR, iface->bss[0]->conf->iface, MAC2STR(addr)); 642 dl_list_add_tail(&iface->sta_seen, &info->list); 643 iface->num_sta_seen++; 644 } 645 646 647 struct hostapd_data * 648 sta_track_seen_on(struct hostapd_iface *iface, const u8 *addr, 649 const char *ifname) 650 { 651 struct hapd_interfaces *interfaces = iface->interfaces; 652 size_t i, j; 653 654 for (i = 0; i < interfaces->count; i++) { 655 struct hostapd_data *hapd = NULL; 656 657 iface = interfaces->iface[i]; 658 for (j = 0; j < iface->num_bss; j++) { 659 hapd = iface->bss[j]; 660 if (os_strcmp(ifname, hapd->conf->iface) == 0) 661 break; 662 hapd = NULL; 663 } 664 665 if (hapd && sta_track_get(iface, addr)) 666 return hapd; 667 } 668 669 return NULL; 670 } 671 672 673 void handle_probe_req(struct hostapd_data *hapd, 674 const struct ieee80211_mgmt *mgmt, size_t len, 675 int ssi_signal) 676 { 677 u8 *resp; 678 struct ieee802_11_elems elems; 679 const u8 *ie; 680 size_t ie_len; 681 size_t i, resp_len; 682 int noack; 683 enum ssid_match_result res; 684 int ret; 685 u16 csa_offs[2]; 686 size_t csa_offs_len; 687 688 if (len < IEEE80211_HDRLEN) 689 return; 690 ie = ((const u8 *) mgmt) + IEEE80211_HDRLEN; 691 if (hapd->iconf->track_sta_max_num) 692 sta_track_add(hapd->iface, mgmt->sa); 693 ie_len = len - IEEE80211_HDRLEN; 694 695 for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++) 696 if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx, 697 mgmt->sa, mgmt->da, mgmt->bssid, 698 ie, ie_len, ssi_signal) > 0) 699 return; 700 701 if (!hapd->iconf->send_probe_response) 702 return; 703 704 if (ieee802_11_parse_elems(ie, ie_len, &elems, 0) == ParseFailed) { 705 wpa_printf(MSG_DEBUG, "Could not parse ProbeReq from " MACSTR, 706 MAC2STR(mgmt->sa)); 707 return; 708 } 709 710 if ((!elems.ssid || !elems.supp_rates)) { 711 wpa_printf(MSG_DEBUG, "STA " MACSTR " sent probe request " 712 "without SSID or supported rates element", 713 MAC2STR(mgmt->sa)); 714 return; 715 } 716 717 /* 718 * No need to reply if the Probe Request frame was sent on an adjacent 719 * channel. IEEE Std 802.11-2012 describes this as a requirement for an 720 * AP with dot11RadioMeasurementActivated set to true, but strictly 721 * speaking does not allow such ignoring of Probe Request frames if 722 * dot11RadioMeasurementActivated is false. Anyway, this can help reduce 723 * number of unnecessary Probe Response frames for cases where the STA 724 * is less likely to see them (Probe Request frame sent on a 725 * neighboring, but partially overlapping, channel). 726 */ 727 if (elems.ds_params && 728 hapd->iface->current_mode && 729 (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G || 730 hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211B) && 731 hapd->iconf->channel != elems.ds_params[0]) { 732 wpa_printf(MSG_DEBUG, 733 "Ignore Probe Request due to DS Params mismatch: chan=%u != ds.chan=%u", 734 hapd->iconf->channel, elems.ds_params[0]); 735 return; 736 } 737 738 #ifdef CONFIG_P2P 739 if (hapd->p2p && hapd->p2p_group && elems.wps_ie) { 740 struct wpabuf *wps; 741 wps = ieee802_11_vendor_ie_concat(ie, ie_len, WPS_DEV_OUI_WFA); 742 if (wps && !p2p_group_match_dev_type(hapd->p2p_group, wps)) { 743 wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request " 744 "due to mismatch with Requested Device " 745 "Type"); 746 wpabuf_free(wps); 747 return; 748 } 749 wpabuf_free(wps); 750 } 751 752 if (hapd->p2p && hapd->p2p_group && elems.p2p) { 753 struct wpabuf *p2p; 754 p2p = ieee802_11_vendor_ie_concat(ie, ie_len, P2P_IE_VENDOR_TYPE); 755 if (p2p && !p2p_group_match_dev_id(hapd->p2p_group, p2p)) { 756 wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request " 757 "due to mismatch with Device ID"); 758 wpabuf_free(p2p); 759 return; 760 } 761 wpabuf_free(p2p); 762 } 763 #endif /* CONFIG_P2P */ 764 765 if (hapd->conf->ignore_broadcast_ssid && elems.ssid_len == 0 && 766 elems.ssid_list_len == 0) { 767 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR " for " 768 "broadcast SSID ignored", MAC2STR(mgmt->sa)); 769 return; 770 } 771 772 #ifdef CONFIG_P2P 773 if ((hapd->conf->p2p & P2P_GROUP_OWNER) && 774 elems.ssid_len == P2P_WILDCARD_SSID_LEN && 775 os_memcmp(elems.ssid, P2P_WILDCARD_SSID, 776 P2P_WILDCARD_SSID_LEN) == 0) { 777 /* Process P2P Wildcard SSID like Wildcard SSID */ 778 elems.ssid_len = 0; 779 } 780 #endif /* CONFIG_P2P */ 781 782 res = ssid_match(hapd, elems.ssid, elems.ssid_len, 783 elems.ssid_list, elems.ssid_list_len); 784 if (res == NO_SSID_MATCH) { 785 if (!(mgmt->da[0] & 0x01)) { 786 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR 787 " for foreign SSID '%s' (DA " MACSTR ")%s", 788 MAC2STR(mgmt->sa), 789 wpa_ssid_txt(elems.ssid, elems.ssid_len), 790 MAC2STR(mgmt->da), 791 elems.ssid_list ? " (SSID list)" : ""); 792 } 793 return; 794 } 795 796 #ifdef CONFIG_INTERWORKING 797 if (hapd->conf->interworking && 798 elems.interworking && elems.interworking_len >= 1) { 799 u8 ant = elems.interworking[0] & 0x0f; 800 if (ant != INTERWORKING_ANT_WILDCARD && 801 ant != hapd->conf->access_network_type) { 802 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR 803 " for mismatching ANT %u ignored", 804 MAC2STR(mgmt->sa), ant); 805 return; 806 } 807 } 808 809 if (hapd->conf->interworking && elems.interworking && 810 (elems.interworking_len == 7 || elems.interworking_len == 9)) { 811 const u8 *hessid; 812 if (elems.interworking_len == 7) 813 hessid = elems.interworking + 1; 814 else 815 hessid = elems.interworking + 1 + 2; 816 if (!is_broadcast_ether_addr(hessid) && 817 os_memcmp(hessid, hapd->conf->hessid, ETH_ALEN) != 0) { 818 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR 819 " for mismatching HESSID " MACSTR 820 " ignored", 821 MAC2STR(mgmt->sa), MAC2STR(hessid)); 822 return; 823 } 824 } 825 #endif /* CONFIG_INTERWORKING */ 826 827 #ifdef CONFIG_P2P 828 if ((hapd->conf->p2p & P2P_GROUP_OWNER) && 829 supp_rates_11b_only(&elems)) { 830 /* Indicates support for 11b rates only */ 831 wpa_printf(MSG_EXCESSIVE, "P2P: Ignore Probe Request from " 832 MACSTR " with only 802.11b rates", 833 MAC2STR(mgmt->sa)); 834 return; 835 } 836 #endif /* CONFIG_P2P */ 837 838 /* TODO: verify that supp_rates contains at least one matching rate 839 * with AP configuration */ 840 841 if (hapd->conf->no_probe_resp_if_seen_on && 842 is_multicast_ether_addr(mgmt->da) && 843 is_multicast_ether_addr(mgmt->bssid) && 844 sta_track_seen_on(hapd->iface, mgmt->sa, 845 hapd->conf->no_probe_resp_if_seen_on)) { 846 wpa_printf(MSG_MSGDUMP, "%s: Ignore Probe Request from " MACSTR 847 " since STA has been seen on %s", 848 hapd->conf->iface, MAC2STR(mgmt->sa), 849 hapd->conf->no_probe_resp_if_seen_on); 850 return; 851 } 852 853 if (hapd->conf->no_probe_resp_if_max_sta && 854 is_multicast_ether_addr(mgmt->da) && 855 is_multicast_ether_addr(mgmt->bssid) && 856 hapd->num_sta >= hapd->conf->max_num_sta && 857 !ap_get_sta(hapd, mgmt->sa)) { 858 wpa_printf(MSG_MSGDUMP, "%s: Ignore Probe Request from " MACSTR 859 " since no room for additional STA", 860 hapd->conf->iface, MAC2STR(mgmt->sa)); 861 return; 862 } 863 864 #ifdef CONFIG_TESTING_OPTIONS 865 if (hapd->iconf->ignore_probe_probability > 0.0 && 866 drand48() < hapd->iconf->ignore_probe_probability) { 867 wpa_printf(MSG_INFO, 868 "TESTING: ignoring probe request from " MACSTR, 869 MAC2STR(mgmt->sa)); 870 return; 871 } 872 #endif /* CONFIG_TESTING_OPTIONS */ 873 874 resp = hostapd_gen_probe_resp(hapd, mgmt, elems.p2p != NULL, 875 &resp_len); 876 if (resp == NULL) 877 return; 878 879 /* 880 * If this is a broadcast probe request, apply no ack policy to avoid 881 * excessive retries. 882 */ 883 noack = !!(res == WILDCARD_SSID_MATCH && 884 is_broadcast_ether_addr(mgmt->da)); 885 886 csa_offs_len = 0; 887 if (hapd->csa_in_progress) { 888 if (hapd->cs_c_off_proberesp) 889 csa_offs[csa_offs_len++] = 890 hapd->cs_c_off_proberesp; 891 892 if (hapd->cs_c_off_ecsa_proberesp) 893 csa_offs[csa_offs_len++] = 894 hapd->cs_c_off_ecsa_proberesp; 895 } 896 897 ret = hostapd_drv_send_mlme_csa(hapd, resp, resp_len, noack, 898 csa_offs_len ? csa_offs : NULL, 899 csa_offs_len); 900 901 if (ret < 0) 902 wpa_printf(MSG_INFO, "handle_probe_req: send failed"); 903 904 os_free(resp); 905 906 wpa_printf(MSG_EXCESSIVE, "STA " MACSTR " sent probe request for %s " 907 "SSID", MAC2STR(mgmt->sa), 908 elems.ssid_len == 0 ? "broadcast" : "our"); 909 } 910 911 912 static u8 * hostapd_probe_resp_offloads(struct hostapd_data *hapd, 913 size_t *resp_len) 914 { 915 /* check probe response offloading caps and print warnings */ 916 if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_PROBE_RESP_OFFLOAD)) 917 return NULL; 918 919 #ifdef CONFIG_WPS 920 if (hapd->conf->wps_state && hapd->wps_probe_resp_ie && 921 (!(hapd->iface->probe_resp_offloads & 922 (WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS | 923 WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS2)))) 924 wpa_printf(MSG_WARNING, "Device is trying to offload WPS " 925 "Probe Response while not supporting this"); 926 #endif /* CONFIG_WPS */ 927 928 #ifdef CONFIG_P2P 929 if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_probe_resp_ie && 930 !(hapd->iface->probe_resp_offloads & 931 WPA_DRIVER_PROBE_RESP_OFFLOAD_P2P)) 932 wpa_printf(MSG_WARNING, "Device is trying to offload P2P " 933 "Probe Response while not supporting this"); 934 #endif /* CONFIG_P2P */ 935 936 if (hapd->conf->interworking && 937 !(hapd->iface->probe_resp_offloads & 938 WPA_DRIVER_PROBE_RESP_OFFLOAD_INTERWORKING)) 939 wpa_printf(MSG_WARNING, "Device is trying to offload " 940 "Interworking Probe Response while not supporting " 941 "this"); 942 943 /* Generate a Probe Response template for the non-P2P case */ 944 return hostapd_gen_probe_resp(hapd, NULL, 0, resp_len); 945 } 946 947 #endif /* NEED_AP_MLME */ 948 949 950 int ieee802_11_build_ap_params(struct hostapd_data *hapd, 951 struct wpa_driver_ap_params *params) 952 { 953 struct ieee80211_mgmt *head = NULL; 954 u8 *tail = NULL; 955 size_t head_len = 0, tail_len = 0; 956 u8 *resp = NULL; 957 size_t resp_len = 0; 958 #ifdef NEED_AP_MLME 959 u16 capab_info; 960 u8 *pos, *tailpos, *csa_pos; 961 962 #define BEACON_HEAD_BUF_SIZE 256 963 #define BEACON_TAIL_BUF_SIZE 512 964 head = os_zalloc(BEACON_HEAD_BUF_SIZE); 965 tail_len = BEACON_TAIL_BUF_SIZE; 966 #ifdef CONFIG_WPS 967 if (hapd->conf->wps_state && hapd->wps_beacon_ie) 968 tail_len += wpabuf_len(hapd->wps_beacon_ie); 969 #endif /* CONFIG_WPS */ 970 #ifdef CONFIG_P2P 971 if (hapd->p2p_beacon_ie) 972 tail_len += wpabuf_len(hapd->p2p_beacon_ie); 973 #endif /* CONFIG_P2P */ 974 #ifdef CONFIG_FST 975 if (hapd->iface->fst_ies) 976 tail_len += wpabuf_len(hapd->iface->fst_ies); 977 #endif /* CONFIG_FST */ 978 if (hapd->conf->vendor_elements) 979 tail_len += wpabuf_len(hapd->conf->vendor_elements); 980 981 #ifdef CONFIG_IEEE80211AC 982 if (hapd->conf->vendor_vht) { 983 tail_len += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) + 984 2 + sizeof(struct ieee80211_vht_operation); 985 } 986 #endif /* CONFIG_IEEE80211AC */ 987 988 tail_len += hostapd_mbo_ie_len(hapd); 989 990 tailpos = tail = os_malloc(tail_len); 991 if (head == NULL || tail == NULL) { 992 wpa_printf(MSG_ERROR, "Failed to set beacon data"); 993 os_free(head); 994 os_free(tail); 995 return -1; 996 } 997 998 head->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 999 WLAN_FC_STYPE_BEACON); 1000 head->duration = host_to_le16(0); 1001 os_memset(head->da, 0xff, ETH_ALEN); 1002 1003 os_memcpy(head->sa, hapd->own_addr, ETH_ALEN); 1004 os_memcpy(head->bssid, hapd->own_addr, ETH_ALEN); 1005 head->u.beacon.beacon_int = 1006 host_to_le16(hapd->iconf->beacon_int); 1007 1008 /* hardware or low-level driver will setup seq_ctrl and timestamp */ 1009 capab_info = hostapd_own_capab_info(hapd); 1010 head->u.beacon.capab_info = host_to_le16(capab_info); 1011 pos = &head->u.beacon.variable[0]; 1012 1013 /* SSID */ 1014 *pos++ = WLAN_EID_SSID; 1015 if (hapd->conf->ignore_broadcast_ssid == 2) { 1016 /* clear the data, but keep the correct length of the SSID */ 1017 *pos++ = hapd->conf->ssid.ssid_len; 1018 os_memset(pos, 0, hapd->conf->ssid.ssid_len); 1019 pos += hapd->conf->ssid.ssid_len; 1020 } else if (hapd->conf->ignore_broadcast_ssid) { 1021 *pos++ = 0; /* empty SSID */ 1022 } else { 1023 *pos++ = hapd->conf->ssid.ssid_len; 1024 os_memcpy(pos, hapd->conf->ssid.ssid, 1025 hapd->conf->ssid.ssid_len); 1026 pos += hapd->conf->ssid.ssid_len; 1027 } 1028 1029 /* Supported rates */ 1030 pos = hostapd_eid_supp_rates(hapd, pos); 1031 1032 /* DS Params */ 1033 pos = hostapd_eid_ds_params(hapd, pos); 1034 1035 head_len = pos - (u8 *) head; 1036 1037 tailpos = hostapd_eid_country(hapd, tailpos, 1038 tail + BEACON_TAIL_BUF_SIZE - tailpos); 1039 1040 /* Power Constraint element */ 1041 tailpos = hostapd_eid_pwr_constraint(hapd, tailpos); 1042 1043 /* CSA IE */ 1044 csa_pos = hostapd_eid_csa(hapd, tailpos); 1045 if (csa_pos != tailpos) 1046 hapd->cs_c_off_beacon = csa_pos - tail - 1; 1047 tailpos = csa_pos; 1048 1049 /* ERP Information element */ 1050 tailpos = hostapd_eid_erp_info(hapd, tailpos); 1051 1052 /* Extended supported rates */ 1053 tailpos = hostapd_eid_ext_supp_rates(hapd, tailpos); 1054 1055 /* RSN, MDIE, WPA */ 1056 tailpos = hostapd_eid_wpa(hapd, tailpos, tail + BEACON_TAIL_BUF_SIZE - 1057 tailpos); 1058 1059 tailpos = hostapd_eid_rm_enabled_capab(hapd, tailpos, 1060 tail + BEACON_TAIL_BUF_SIZE - 1061 tailpos); 1062 1063 tailpos = hostapd_eid_bss_load(hapd, tailpos, 1064 tail + BEACON_TAIL_BUF_SIZE - tailpos); 1065 1066 /* eCSA IE */ 1067 csa_pos = hostapd_eid_ecsa(hapd, tailpos); 1068 if (csa_pos != tailpos) 1069 hapd->cs_c_off_ecsa_beacon = csa_pos - tail - 1; 1070 tailpos = csa_pos; 1071 1072 tailpos = hostapd_eid_supported_op_classes(hapd, tailpos); 1073 1074 #ifdef CONFIG_IEEE80211N 1075 /* Secondary Channel Offset element */ 1076 /* TODO: The standard doesn't specify a position for this element. */ 1077 tailpos = hostapd_eid_secondary_channel(hapd, tailpos); 1078 1079 tailpos = hostapd_eid_ht_capabilities(hapd, tailpos); 1080 tailpos = hostapd_eid_ht_operation(hapd, tailpos); 1081 #endif /* CONFIG_IEEE80211N */ 1082 1083 tailpos = hostapd_eid_ext_capab(hapd, tailpos); 1084 1085 /* 1086 * TODO: Time Advertisement element should only be included in some 1087 * DTIM Beacon frames. 1088 */ 1089 tailpos = hostapd_eid_time_adv(hapd, tailpos); 1090 1091 tailpos = hostapd_eid_interworking(hapd, tailpos); 1092 tailpos = hostapd_eid_adv_proto(hapd, tailpos); 1093 tailpos = hostapd_eid_roaming_consortium(hapd, tailpos); 1094 1095 #ifdef CONFIG_FST 1096 if (hapd->iface->fst_ies) { 1097 os_memcpy(tailpos, wpabuf_head(hapd->iface->fst_ies), 1098 wpabuf_len(hapd->iface->fst_ies)); 1099 tailpos += wpabuf_len(hapd->iface->fst_ies); 1100 } 1101 #endif /* CONFIG_FST */ 1102 1103 #ifdef CONFIG_IEEE80211AC 1104 if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) { 1105 tailpos = hostapd_eid_vht_capabilities(hapd, tailpos); 1106 tailpos = hostapd_eid_vht_operation(hapd, tailpos); 1107 tailpos = hostapd_eid_txpower_envelope(hapd, tailpos); 1108 tailpos = hostapd_eid_wb_chsw_wrapper(hapd, tailpos); 1109 } 1110 if (hapd->conf->vendor_vht) 1111 tailpos = hostapd_eid_vendor_vht(hapd, tailpos); 1112 #endif /* CONFIG_IEEE80211AC */ 1113 1114 /* Wi-Fi Alliance WMM */ 1115 tailpos = hostapd_eid_wmm(hapd, tailpos); 1116 1117 #ifdef CONFIG_WPS 1118 if (hapd->conf->wps_state && hapd->wps_beacon_ie) { 1119 os_memcpy(tailpos, wpabuf_head(hapd->wps_beacon_ie), 1120 wpabuf_len(hapd->wps_beacon_ie)); 1121 tailpos += wpabuf_len(hapd->wps_beacon_ie); 1122 } 1123 #endif /* CONFIG_WPS */ 1124 1125 #ifdef CONFIG_P2P 1126 if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_beacon_ie) { 1127 os_memcpy(tailpos, wpabuf_head(hapd->p2p_beacon_ie), 1128 wpabuf_len(hapd->p2p_beacon_ie)); 1129 tailpos += wpabuf_len(hapd->p2p_beacon_ie); 1130 } 1131 #endif /* CONFIG_P2P */ 1132 #ifdef CONFIG_P2P_MANAGER 1133 if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) == 1134 P2P_MANAGE) 1135 tailpos = hostapd_eid_p2p_manage(hapd, tailpos); 1136 #endif /* CONFIG_P2P_MANAGER */ 1137 1138 #ifdef CONFIG_HS20 1139 tailpos = hostapd_eid_hs20_indication(hapd, tailpos); 1140 tailpos = hostapd_eid_osen(hapd, tailpos); 1141 #endif /* CONFIG_HS20 */ 1142 1143 tailpos = hostapd_eid_mbo(hapd, tailpos, tail + tail_len - tailpos); 1144 1145 if (hapd->conf->vendor_elements) { 1146 os_memcpy(tailpos, wpabuf_head(hapd->conf->vendor_elements), 1147 wpabuf_len(hapd->conf->vendor_elements)); 1148 tailpos += wpabuf_len(hapd->conf->vendor_elements); 1149 } 1150 1151 tail_len = tailpos > tail ? tailpos - tail : 0; 1152 1153 resp = hostapd_probe_resp_offloads(hapd, &resp_len); 1154 #endif /* NEED_AP_MLME */ 1155 1156 os_memset(params, 0, sizeof(*params)); 1157 params->head = (u8 *) head; 1158 params->head_len = head_len; 1159 params->tail = tail; 1160 params->tail_len = tail_len; 1161 params->proberesp = resp; 1162 params->proberesp_len = resp_len; 1163 params->dtim_period = hapd->conf->dtim_period; 1164 params->beacon_int = hapd->iconf->beacon_int; 1165 params->basic_rates = hapd->iface->basic_rates; 1166 params->ssid = hapd->conf->ssid.ssid; 1167 params->ssid_len = hapd->conf->ssid.ssid_len; 1168 if ((hapd->conf->wpa & (WPA_PROTO_WPA | WPA_PROTO_RSN)) == 1169 (WPA_PROTO_WPA | WPA_PROTO_RSN)) 1170 params->pairwise_ciphers = hapd->conf->wpa_pairwise | 1171 hapd->conf->rsn_pairwise; 1172 else if (hapd->conf->wpa & WPA_PROTO_RSN) 1173 params->pairwise_ciphers = hapd->conf->rsn_pairwise; 1174 else if (hapd->conf->wpa & WPA_PROTO_WPA) 1175 params->pairwise_ciphers = hapd->conf->wpa_pairwise; 1176 params->group_cipher = hapd->conf->wpa_group; 1177 params->key_mgmt_suites = hapd->conf->wpa_key_mgmt; 1178 params->auth_algs = hapd->conf->auth_algs; 1179 params->wpa_version = hapd->conf->wpa; 1180 params->privacy = hapd->conf->ssid.wep.keys_set || hapd->conf->wpa || 1181 (hapd->conf->ieee802_1x && 1182 (hapd->conf->default_wep_key_len || 1183 hapd->conf->individual_wep_key_len)); 1184 switch (hapd->conf->ignore_broadcast_ssid) { 1185 case 0: 1186 params->hide_ssid = NO_SSID_HIDING; 1187 break; 1188 case 1: 1189 params->hide_ssid = HIDDEN_SSID_ZERO_LEN; 1190 break; 1191 case 2: 1192 params->hide_ssid = HIDDEN_SSID_ZERO_CONTENTS; 1193 break; 1194 } 1195 params->isolate = hapd->conf->isolate; 1196 params->smps_mode = hapd->iconf->ht_capab & HT_CAP_INFO_SMPS_MASK; 1197 #ifdef NEED_AP_MLME 1198 params->cts_protect = !!(ieee802_11_erp_info(hapd) & 1199 ERP_INFO_USE_PROTECTION); 1200 params->preamble = hapd->iface->num_sta_no_short_preamble == 0 && 1201 hapd->iconf->preamble == SHORT_PREAMBLE; 1202 if (hapd->iface->current_mode && 1203 hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G) 1204 params->short_slot_time = 1205 hapd->iface->num_sta_no_short_slot_time > 0 ? 0 : 1; 1206 else 1207 params->short_slot_time = -1; 1208 if (!hapd->iconf->ieee80211n || hapd->conf->disable_11n) 1209 params->ht_opmode = -1; 1210 else 1211 params->ht_opmode = hapd->iface->ht_op_mode; 1212 #endif /* NEED_AP_MLME */ 1213 params->interworking = hapd->conf->interworking; 1214 if (hapd->conf->interworking && 1215 !is_zero_ether_addr(hapd->conf->hessid)) 1216 params->hessid = hapd->conf->hessid; 1217 params->access_network_type = hapd->conf->access_network_type; 1218 params->ap_max_inactivity = hapd->conf->ap_max_inactivity; 1219 #ifdef CONFIG_P2P 1220 params->p2p_go_ctwindow = hapd->iconf->p2p_go_ctwindow; 1221 #endif /* CONFIG_P2P */ 1222 #ifdef CONFIG_HS20 1223 params->disable_dgaf = hapd->conf->disable_dgaf; 1224 if (hapd->conf->osen) { 1225 params->privacy = 1; 1226 params->osen = 1; 1227 } 1228 #endif /* CONFIG_HS20 */ 1229 params->pbss = hapd->conf->pbss; 1230 return 0; 1231 } 1232 1233 1234 void ieee802_11_free_ap_params(struct wpa_driver_ap_params *params) 1235 { 1236 os_free(params->tail); 1237 params->tail = NULL; 1238 os_free(params->head); 1239 params->head = NULL; 1240 os_free(params->proberesp); 1241 params->proberesp = NULL; 1242 } 1243 1244 1245 int ieee802_11_set_beacon(struct hostapd_data *hapd) 1246 { 1247 struct wpa_driver_ap_params params; 1248 struct hostapd_freq_params freq; 1249 struct hostapd_iface *iface = hapd->iface; 1250 struct hostapd_config *iconf = iface->conf; 1251 struct wpabuf *beacon, *proberesp, *assocresp; 1252 int res, ret = -1; 1253 1254 if (hapd->csa_in_progress) { 1255 wpa_printf(MSG_ERROR, "Cannot set beacons during CSA period"); 1256 return -1; 1257 } 1258 1259 hapd->beacon_set_done = 1; 1260 1261 if (ieee802_11_build_ap_params(hapd, ¶ms) < 0) 1262 return -1; 1263 1264 if (hostapd_build_ap_extra_ies(hapd, &beacon, &proberesp, &assocresp) < 1265 0) 1266 goto fail; 1267 1268 params.beacon_ies = beacon; 1269 params.proberesp_ies = proberesp; 1270 params.assocresp_ies = assocresp; 1271 params.reenable = hapd->reenable_beacon; 1272 hapd->reenable_beacon = 0; 1273 1274 if (iface->current_mode && 1275 hostapd_set_freq_params(&freq, iconf->hw_mode, iface->freq, 1276 iconf->channel, iconf->ieee80211n, 1277 iconf->ieee80211ac, 1278 iconf->secondary_channel, 1279 iconf->vht_oper_chwidth, 1280 iconf->vht_oper_centr_freq_seg0_idx, 1281 iconf->vht_oper_centr_freq_seg1_idx, 1282 iface->current_mode->vht_capab) == 0) 1283 params.freq = &freq; 1284 1285 res = hostapd_drv_set_ap(hapd, ¶ms); 1286 hostapd_free_ap_extra_ies(hapd, beacon, proberesp, assocresp); 1287 if (res) 1288 wpa_printf(MSG_ERROR, "Failed to set beacon parameters"); 1289 else 1290 ret = 0; 1291 fail: 1292 ieee802_11_free_ap_params(¶ms); 1293 return ret; 1294 } 1295 1296 1297 int ieee802_11_set_beacons(struct hostapd_iface *iface) 1298 { 1299 size_t i; 1300 int ret = 0; 1301 1302 for (i = 0; i < iface->num_bss; i++) { 1303 if (iface->bss[i]->started && 1304 ieee802_11_set_beacon(iface->bss[i]) < 0) 1305 ret = -1; 1306 } 1307 1308 return ret; 1309 } 1310 1311 1312 /* only update beacons if started */ 1313 int ieee802_11_update_beacons(struct hostapd_iface *iface) 1314 { 1315 size_t i; 1316 int ret = 0; 1317 1318 for (i = 0; i < iface->num_bss; i++) { 1319 if (iface->bss[i]->beacon_set_done && iface->bss[i]->started && 1320 ieee802_11_set_beacon(iface->bss[i]) < 0) 1321 ret = -1; 1322 } 1323 1324 return ret; 1325 } 1326 1327 #endif /* CONFIG_NATIVE_WINDOWS */ 1328
