/* * hostapd / IEEE 802.11 Management: Beacon and Probe Request/Response * Copyright (c) 2002-2004, Instant802 Networks, Inc. * Copyright (c) 2005-2006, Devicescape Software, Inc. * Copyright (c) 2008-2012, Jouni Malinen * * This software may be distributed under the terms of the BSD license. * See README for more details. */ #include "utils/includes.h" #ifndef CONFIG_NATIVE_WINDOWS #include "utils/common.h" #include "common/ieee802_11_defs.h" #include "common/ieee802_11_common.h" #include "common/hw_features_common.h" #include "common/wpa_ctrl.h" #include "crypto/sha1.h" #include "wps/wps_defs.h" #include "p2p/p2p.h" #include "hostapd.h" #include "ieee802_11.h" #include "wpa_auth.h" #include "wmm.h" #include "ap_config.h" #include "sta_info.h" #include "p2p_hostapd.h" #include "ap_drv_ops.h" #include "beacon.h" #include "hs20.h" #include "dfs.h" #include "taxonomy.h" #include "ieee802_11_auth.h" #ifdef NEED_AP_MLME static u8 * hostapd_eid_bss_load(struct hostapd_data *hapd, u8 *eid, size_t len) { if (len < 2 + 5) return eid; #ifdef CONFIG_TESTING_OPTIONS if (hapd->conf->bss_load_test_set) { *eid++ = WLAN_EID_BSS_LOAD; *eid++ = 5; os_memcpy(eid, hapd->conf->bss_load_test, 5); eid += 5; return eid; } #endif /* CONFIG_TESTING_OPTIONS */ if (hapd->conf->bss_load_update_period) { *eid++ = WLAN_EID_BSS_LOAD; *eid++ = 5; WPA_PUT_LE16(eid, hapd->num_sta); eid += 2; *eid++ = hapd->iface->channel_utilization; WPA_PUT_LE16(eid, 0); /* no available admission capabity */ eid += 2; } return eid; } static u8 ieee802_11_erp_info(struct hostapd_data *hapd) { u8 erp = 0; if (hapd->iface->current_mode == NULL || hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G) return 0; if (hapd->iface->olbc) erp |= ERP_INFO_USE_PROTECTION; if (hapd->iface->num_sta_non_erp > 0) { erp |= ERP_INFO_NON_ERP_PRESENT | ERP_INFO_USE_PROTECTION; } if (hapd->iface->num_sta_no_short_preamble > 0 || hapd->iconf->preamble == LONG_PREAMBLE) erp |= ERP_INFO_BARKER_PREAMBLE_MODE; return erp; } static u8 * hostapd_eid_ds_params(struct hostapd_data *hapd, u8 *eid) { enum hostapd_hw_mode hw_mode = hapd->iconf->hw_mode; if (hw_mode != HOSTAPD_MODE_IEEE80211G && hw_mode != HOSTAPD_MODE_IEEE80211B) return eid; *eid++ = WLAN_EID_DS_PARAMS; *eid++ = 1; *eid++ = hapd->iconf->channel; return eid; } static u8 * hostapd_eid_erp_info(struct hostapd_data *hapd, u8 *eid) { if (hapd->iface->current_mode == NULL || hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G) return eid; /* Set NonERP_present and use_protection bits if there * are any associated NonERP stations. */ /* TODO: use_protection bit can be set to zero even if * there are NonERP stations present. This optimization * might be useful if NonERP stations are "quiet". * See 802.11g/D6 E-1 for recommended practice. * In addition, Non ERP present might be set, if AP detects Non ERP * operation on other APs. */ /* Add ERP Information element */ *eid++ = WLAN_EID_ERP_INFO; *eid++ = 1; *eid++ = ieee802_11_erp_info(hapd); return eid; } static u8 * hostapd_eid_pwr_constraint(struct hostapd_data *hapd, u8 *eid) { u8 *pos = eid; u8 local_pwr_constraint = 0; int dfs; if (hapd->iface->current_mode == NULL || hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211A) return eid; /* Let host drivers add this IE if DFS support is offloaded */ if (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_DFS_OFFLOAD) return eid; /* * There is no DFS support and power constraint was not directly * requested by config option. */ if (!hapd->iconf->ieee80211h && hapd->iconf->local_pwr_constraint == -1) return eid; /* Check if DFS is required by regulatory. */ dfs = hostapd_is_dfs_required(hapd->iface); if (dfs < 0) { wpa_printf(MSG_WARNING, "Failed to check if DFS is required; ret=%d", dfs); dfs = 0; } if (dfs == 0 && hapd->iconf->local_pwr_constraint == -1) return eid; /* * ieee80211h (DFS) is enabled so Power Constraint element shall * be added when running on DFS channel whenever local_pwr_constraint * is configured or not. In order to meet regulations when TPC is not * implemented using a transmit power that is below the legal maximum * (including any mitigation factor) should help. In this case, * indicate 3 dB below maximum allowed transmit power. */ if (hapd->iconf->local_pwr_constraint == -1) local_pwr_constraint = 3; /* * A STA that is not an AP shall use a transmit power less than or * equal to the local maximum transmit power level for the channel. * The local maximum transmit power can be calculated from the formula: * local max TX pwr = max TX pwr - local pwr constraint * Where max TX pwr is maximum transmit power level specified for * channel in Country element and local pwr constraint is specified * for channel in this Power Constraint element. */ /* Element ID */ *pos++ = WLAN_EID_PWR_CONSTRAINT; /* Length */ *pos++ = 1; /* Local Power Constraint */ if (local_pwr_constraint) *pos++ = local_pwr_constraint; else *pos++ = hapd->iconf->local_pwr_constraint; return pos; } static u8 * hostapd_eid_country_add(struct hostapd_data *hapd, u8 *pos, u8 *end, int chan_spacing, struct hostapd_channel_data *start, struct hostapd_channel_data *prev) { if (end - pos < 3) return pos; /* first channel number */ *pos++ = start->chan; /* number of channels */ *pos++ = (prev->chan - start->chan) / chan_spacing + 1; /* maximum transmit power level */ if (!is_6ghz_op_class(hapd->iconf->op_class)) *pos++ = start->max_tx_power; else *pos++ = 0; /* Reserved when operating on the 6 GHz band */ return pos; } static u8 * hostapd_fill_subband_triplets(struct hostapd_data *hapd, u8 *pos, u8 *end) { int i; struct hostapd_hw_modes *mode; struct hostapd_channel_data *start, *prev; int chan_spacing = 1; mode = hapd->iface->current_mode; if (mode->mode == HOSTAPD_MODE_IEEE80211A) chan_spacing = 4; start = prev = NULL; for (i = 0; i < mode->num_channels; i++) { struct hostapd_channel_data *chan = &mode->channels[i]; if (chan->flag & HOSTAPD_CHAN_DISABLED) continue; if (start && prev && prev->chan + chan_spacing == chan->chan && start->max_tx_power == chan->max_tx_power) { prev = chan; continue; /* can use same entry */ } if (start && prev) pos = hostapd_eid_country_add(hapd, pos, end, chan_spacing, start, prev); /* Start new group */ start = prev = chan; } if (start) { pos = hostapd_eid_country_add(hapd, pos, end, chan_spacing, start, prev); } return pos; } static u8 * hostapd_eid_country(struct hostapd_data *hapd, u8 *eid, int max_len) { u8 *pos = eid; u8 *end = eid + max_len; if (!hapd->iconf->ieee80211d || max_len < 6 || hapd->iface->current_mode == NULL) return eid; *pos++ = WLAN_EID_COUNTRY; pos++; /* length will be set later */ os_memcpy(pos, hapd->iconf->country, 3); /* e.g., 'US ' */ pos += 3; if (is_6ghz_op_class(hapd->iconf->op_class)) { /* Force the third octet of the country string to indicate * Global Operating Class (Table E-4) */ eid[4] = 0x04; /* Operating Triplet field */ /* Operating Extension Identifier (>= 201 to indicate this is * not a Subband Triplet field) */ *pos++ = 201; /* Operating Class */ *pos++ = hapd->iconf->op_class; /* Coverage Class */ *pos++ = 0; /* Subband Triplets are required only for the 20 MHz case */ if (hapd->iconf->op_class == 131 || hapd->iconf->op_class == 136) pos = hostapd_fill_subband_triplets(hapd, pos, end); } else { pos = hostapd_fill_subband_triplets(hapd, pos, end); } if ((pos - eid) & 1) { if (end - pos < 1) return eid; *pos++ = 0; /* pad for 16-bit alignment */ } eid[1] = (pos - eid) - 2; return pos; } const u8 * hostapd_wpa_ie(struct hostapd_data *hapd, u8 eid) { const u8 *ies; size_t ies_len; ies = wpa_auth_get_wpa_ie(hapd->wpa_auth, &ies_len); if (!ies) return NULL; return get_ie(ies, ies_len, eid); } static const u8 * hostapd_vendor_wpa_ie(struct hostapd_data *hapd, u32 vendor_type) { const u8 *ies; size_t ies_len; ies = wpa_auth_get_wpa_ie(hapd->wpa_auth, &ies_len); if (!ies) return NULL; return get_vendor_ie(ies, ies_len, vendor_type); } static u8 * hostapd_get_rsne(struct hostapd_data *hapd, u8 *pos, size_t len) { const u8 *ie; ie = hostapd_wpa_ie(hapd, WLAN_EID_RSN); if (!ie || 2U + ie[1] > len) return pos; os_memcpy(pos, ie, 2 + ie[1]); return pos + 2 + ie[1]; } static u8 * hostapd_get_mde(struct hostapd_data *hapd, u8 *pos, size_t len) { const u8 *ie; ie = hostapd_wpa_ie(hapd, WLAN_EID_MOBILITY_DOMAIN); if (!ie || 2U + ie[1] > len) return pos; os_memcpy(pos, ie, 2 + ie[1]); return pos + 2 + ie[1]; } static u8 * hostapd_get_rsnxe(struct hostapd_data *hapd, u8 *pos, size_t len) { const u8 *ie; #ifdef CONFIG_TESTING_OPTIONS if (hapd->conf->no_beacon_rsnxe) { wpa_printf(MSG_INFO, "TESTING: Do not add RSNXE into Beacon"); return pos; } #endif /* CONFIG_TESTING_OPTIONS */ ie = hostapd_wpa_ie(hapd, WLAN_EID_RSNX); if (!ie || 2U + ie[1] > len) return pos; os_memcpy(pos, ie, 2 + ie[1]); return pos + 2 + ie[1]; } static u8 * hostapd_get_wpa_ie(struct hostapd_data *hapd, u8 *pos, size_t len) { const u8 *ie; ie = hostapd_vendor_wpa_ie(hapd, WPA_IE_VENDOR_TYPE); if (!ie || 2U + ie[1] > len) return pos; os_memcpy(pos, ie, 2 + ie[1]); return pos + 2 + ie[1]; } static u8 * hostapd_get_osen_ie(struct hostapd_data *hapd, u8 *pos, size_t len) { const u8 *ie; ie = hostapd_vendor_wpa_ie(hapd, OSEN_IE_VENDOR_TYPE); if (!ie || 2U + ie[1] > len) return pos; os_memcpy(pos, ie, 2 + ie[1]); return pos + 2 + ie[1]; } static u8 * hostapd_eid_csa(struct hostapd_data *hapd, u8 *eid) { #ifdef CONFIG_TESTING_OPTIONS if (hapd->iface->cs_oper_class && hapd->iconf->ecsa_ie_only) return eid; #endif /* CONFIG_TESTING_OPTIONS */ if (!hapd->cs_freq_params.channel) return eid; *eid++ = WLAN_EID_CHANNEL_SWITCH; *eid++ = 3; *eid++ = hapd->cs_block_tx; *eid++ = hapd->cs_freq_params.channel; *eid++ = hapd->cs_count; return eid; } static u8 * hostapd_eid_ecsa(struct hostapd_data *hapd, u8 *eid) { if (!hapd->cs_freq_params.channel || !hapd->iface->cs_oper_class) return eid; *eid++ = WLAN_EID_EXT_CHANSWITCH_ANN; *eid++ = 4; *eid++ = hapd->cs_block_tx; *eid++ = hapd->iface->cs_oper_class; *eid++ = hapd->cs_freq_params.channel; *eid++ = hapd->cs_count; return eid; } static u8 * hostapd_eid_supported_op_classes(struct hostapd_data *hapd, u8 *eid) { u8 op_class, channel; if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_AP_CSA) || !hapd->iface->freq) return eid; if (ieee80211_freq_to_channel_ext(hapd->iface->freq, hapd->iconf->secondary_channel, hostapd_get_oper_chwidth(hapd->iconf), &op_class, &channel) == NUM_HOSTAPD_MODES) return eid; *eid++ = WLAN_EID_SUPPORTED_OPERATING_CLASSES; *eid++ = 2; /* Current Operating Class */ *eid++ = op_class; /* TODO: Advertise all the supported operating classes */ *eid++ = 0; return eid; } static int ieee802_11_build_ap_params_mbssid(struct hostapd_data *hapd, struct wpa_driver_ap_params *params) { struct hostapd_iface *iface = hapd->iface; struct hostapd_data *tx_bss; size_t len, rnr_len = 0; u8 elem_count = 0, *elem = NULL, **elem_offset = NULL, *end; u8 rnr_elem_count = 0, *rnr_elem = NULL, **rnr_elem_offset = NULL; size_t i; if (!iface->mbssid_max_interfaces || iface->num_bss > iface->mbssid_max_interfaces || (iface->conf->mbssid == ENHANCED_MBSSID_ENABLED && !iface->ema_max_periodicity)) goto fail; /* Make sure bss->xrates_supported is set for all BSSs to know whether * it need to be non-inherited. */ for (i = 0; i < iface->num_bss; i++) { u8 buf[100]; hostapd_eid_ext_supp_rates(iface->bss[i], buf); } tx_bss = hostapd_mbssid_get_tx_bss(hapd); len = hostapd_eid_mbssid_len(tx_bss, WLAN_FC_STYPE_BEACON, &elem_count, NULL, 0, &rnr_len); if (!len || (iface->conf->mbssid == ENHANCED_MBSSID_ENABLED && elem_count > iface->ema_max_periodicity)) goto fail; elem = os_zalloc(len); if (!elem) goto fail; elem_offset = os_zalloc(elem_count * sizeof(u8 *)); if (!elem_offset) goto fail; if (rnr_len) { rnr_elem = os_zalloc(rnr_len); if (!rnr_elem) goto fail; rnr_elem_offset = os_calloc(elem_count + 1, sizeof(u8 *)); if (!rnr_elem_offset) goto fail; } end = hostapd_eid_mbssid(tx_bss, elem, elem + len, WLAN_FC_STYPE_BEACON, elem_count, elem_offset, NULL, 0, rnr_elem, &rnr_elem_count, rnr_elem_offset, rnr_len); params->mbssid_tx_iface = tx_bss->conf->iface; params->mbssid_index = hostapd_mbssid_get_bss_index(hapd); params->mbssid_elem = elem; params->mbssid_elem_len = end - elem; params->mbssid_elem_count = elem_count; params->mbssid_elem_offset = elem_offset; params->rnr_elem = rnr_elem; params->rnr_elem_len = rnr_len; params->rnr_elem_count = rnr_elem_count; params->rnr_elem_offset = rnr_elem_offset; if (iface->conf->mbssid == ENHANCED_MBSSID_ENABLED) params->ema = true; return 0; fail: os_free(rnr_elem); os_free(rnr_elem_offset); os_free(elem_offset); os_free(elem); wpa_printf(MSG_ERROR, "MBSSID: Configuration failed"); return -1; } static u8 * hostapd_eid_mbssid_config(struct hostapd_data *hapd, u8 *eid, u8 mbssid_elem_count) { struct hostapd_iface *iface = hapd->iface; if (iface->conf->mbssid == ENHANCED_MBSSID_ENABLED) { *eid++ = WLAN_EID_EXTENSION; *eid++ = 3; *eid++ = WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION; *eid++ = iface->num_bss; *eid++ = mbssid_elem_count; } return eid; } static size_t he_elem_len(struct hostapd_data *hapd) { size_t len = 0; #ifdef CONFIG_IEEE80211AX if (!hapd->iconf->ieee80211ax || hapd->conf->disable_11ax) return len; len += 3 + sizeof(struct ieee80211_he_capabilities) + 3 + sizeof(struct ieee80211_he_operation) + 3 + sizeof(struct ieee80211_he_mu_edca_parameter_set) + 3 + sizeof(struct ieee80211_spatial_reuse); if (is_6ghz_op_class(hapd->iconf->op_class)) { len += sizeof(struct ieee80211_he_6ghz_oper_info) + 3 + sizeof(struct ieee80211_he_6ghz_band_cap); /* An additional Transmit Power Envelope element for * subordinate client */ if (he_reg_is_indoor(hapd->iconf->he_6ghz_reg_pwr_type)) len += 4; /* An additional Transmit Power Envelope element for * default client with unit interpretation of regulatory * client EIRP */ if (hapd->iconf->reg_def_cli_eirp != -1 && he_reg_is_sp(hapd->iconf->he_6ghz_reg_pwr_type)) len += 4; } #endif /* CONFIG_IEEE80211AX */ return len; } struct probe_resp_params { const struct ieee80211_mgmt *req; bool is_p2p; /* Generated IEs will be included inside an ML element */ bool is_ml_sta_info; struct hostapd_data *mld_ap; struct mld_info *mld_info; struct ieee80211_mgmt *resp; size_t resp_len; u8 *csa_pos; u8 *ecsa_pos; const u8 *known_bss; u8 known_bss_len; #ifdef CONFIG_IEEE80211AX u8 *cca_pos; #endif /* CONFIG_IEEE80211AX */ }; static void hostapd_free_probe_resp_params(struct probe_resp_params *params) { #ifdef CONFIG_IEEE80211BE if (!params) return; ap_sta_free_sta_profile(params->mld_info); os_free(params->mld_info); params->mld_info = NULL; #endif /* CONFIG_IEEE80211BE */ } static size_t hostapd_probe_resp_elems_len(struct hostapd_data *hapd, struct probe_resp_params *params) { size_t buflen = 0; #ifdef CONFIG_WPS if (hapd->wps_probe_resp_ie) buflen += wpabuf_len(hapd->wps_probe_resp_ie); #endif /* CONFIG_WPS */ #ifdef CONFIG_P2P if (hapd->p2p_probe_resp_ie) buflen += wpabuf_len(hapd->p2p_probe_resp_ie); #endif /* CONFIG_P2P */ #ifdef CONFIG_FST if (hapd->iface->fst_ies) buflen += wpabuf_len(hapd->iface->fst_ies); #endif /* CONFIG_FST */ if (hapd->conf->vendor_elements) buflen += wpabuf_len(hapd->conf->vendor_elements); #ifdef CONFIG_TESTING_OPTIONS if (hapd->conf->presp_elements) buflen += wpabuf_len(hapd->conf->presp_elements); #endif /* CONFIG_TESTING_OPTIONS */ if (hapd->conf->vendor_vht) { buflen += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) + 2 + sizeof(struct ieee80211_vht_operation); } buflen += he_elem_len(hapd); #ifdef CONFIG_IEEE80211BE if (hapd->iconf->ieee80211be && !hapd->conf->disable_11be) { buflen += hostapd_eid_eht_capab_len(hapd, IEEE80211_MODE_AP); buflen += 3 + sizeof(struct ieee80211_eht_operation); if (hapd->iconf->punct_bitmap) buflen += EHT_OPER_DISABLED_SUBCHAN_BITMAP_SIZE; if (!params->is_ml_sta_info && hapd->conf->mld_ap) { struct hostapd_data *ml_elem_ap = params->mld_ap ? params->mld_ap : hapd; buflen += hostapd_eid_eht_ml_beacon_len( ml_elem_ap, params->mld_info, !!params->mld_ap); } } #endif /* CONFIG_IEEE80211BE */ buflen += hostapd_eid_mbssid_len(hapd, WLAN_FC_STYPE_PROBE_RESP, NULL, params->known_bss, params->known_bss_len, NULL); if (!params->is_ml_sta_info) buflen += hostapd_eid_rnr_len(hapd, WLAN_FC_STYPE_PROBE_RESP, true); buflen += hostapd_mbo_ie_len(hapd); buflen += hostapd_eid_owe_trans_len(hapd); buflen += hostapd_eid_dpp_cc_len(hapd); return buflen; } static u8 * hostapd_probe_resp_fill_elems(struct hostapd_data *hapd, struct probe_resp_params *params, u8 *pos, size_t len) { u8 *csa_pos; u8 *epos; epos = pos + len; if (!params->is_ml_sta_info) { *pos++ = WLAN_EID_SSID; *pos++ = hapd->conf->ssid.ssid_len; os_memcpy(pos, hapd->conf->ssid.ssid, hapd->conf->ssid.ssid_len); pos += hapd->conf->ssid.ssid_len; } /* Supported rates */ pos = hostapd_eid_supp_rates(hapd, pos); /* DS Params */ pos = hostapd_eid_ds_params(hapd, pos); pos = hostapd_eid_country(hapd, pos, epos - pos); /* Power Constraint element */ pos = hostapd_eid_pwr_constraint(hapd, pos); /* * CSA IE * TODO: This should be included inside the ML sta profile */ if (!params->is_ml_sta_info) { csa_pos = hostapd_eid_csa(hapd, pos); if (csa_pos != pos) params->csa_pos = csa_pos - 1; else params->csa_pos = NULL; pos = csa_pos; } /* ERP Information element */ pos = hostapd_eid_erp_info(hapd, pos); /* Extended supported rates */ pos = hostapd_eid_ext_supp_rates(hapd, pos); pos = hostapd_get_rsne(hapd, pos, epos - pos); pos = hostapd_eid_bss_load(hapd, pos, epos - pos); pos = hostapd_eid_mbssid(hapd, pos, epos, WLAN_FC_STYPE_PROBE_RESP, 0, NULL, params->known_bss, params->known_bss_len, NULL, NULL, NULL, 0); pos = hostapd_eid_rm_enabled_capab(hapd, pos, epos - pos); pos = hostapd_get_mde(hapd, pos, epos - pos); /* * eCSA IE * TODO: This should be included inside the ML sta profile */ if (!params->is_ml_sta_info) { csa_pos = hostapd_eid_ecsa(hapd, pos); if (csa_pos != pos) params->ecsa_pos = csa_pos - 1; else params->ecsa_pos = NULL; pos = csa_pos; } pos = hostapd_eid_supported_op_classes(hapd, pos); pos = hostapd_eid_ht_capabilities(hapd, pos); pos = hostapd_eid_ht_operation(hapd, pos); /* Probe Response frames always include all non-TX profiles except * when a list of known BSSes is included in the Probe Request frame. */ pos = hostapd_eid_ext_capab(hapd, pos, hapd->iconf->mbssid >= MBSSID_ENABLED && !params->known_bss_len); pos = hostapd_eid_time_adv(hapd, pos); pos = hostapd_eid_time_zone(hapd, pos); pos = hostapd_eid_interworking(hapd, pos); pos = hostapd_eid_adv_proto(hapd, pos); pos = hostapd_eid_roaming_consortium(hapd, pos); #ifdef CONFIG_FST if (hapd->iface->fst_ies) { os_memcpy(pos, wpabuf_head(hapd->iface->fst_ies), wpabuf_len(hapd->iface->fst_ies)); pos += wpabuf_len(hapd->iface->fst_ies); } #endif /* CONFIG_FST */ #ifdef CONFIG_IEEE80211AC if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac && !is_6ghz_op_class(hapd->iconf->op_class)) { pos = hostapd_eid_vht_capabilities(hapd, pos, 0); pos = hostapd_eid_vht_operation(hapd, pos); pos = hostapd_eid_txpower_envelope(hapd, pos); } #endif /* CONFIG_IEEE80211AC */ #ifdef CONFIG_IEEE80211AX if (hapd->iconf->ieee80211ax && !hapd->conf->disable_11ax && is_6ghz_op_class(hapd->iconf->op_class)) pos = hostapd_eid_txpower_envelope(hapd, pos); #endif /* CONFIG_IEEE80211AX */ pos = hostapd_eid_wb_chsw_wrapper(hapd, pos); if (!params->is_ml_sta_info) pos = hostapd_eid_rnr(hapd, pos, WLAN_FC_STYPE_PROBE_RESP, true); pos = hostapd_eid_fils_indic(hapd, pos, 0); pos = hostapd_get_rsnxe(hapd, pos, epos - pos); #ifdef CONFIG_IEEE80211AX if (hapd->iconf->ieee80211ax && !hapd->conf->disable_11ax) { u8 *cca_pos; pos = hostapd_eid_he_capab(hapd, pos, IEEE80211_MODE_AP); pos = hostapd_eid_he_operation(hapd, pos); /* BSS Color Change Announcement element */ cca_pos = hostapd_eid_cca(hapd, pos); if (cca_pos != pos) params->cca_pos = cca_pos - 2; else params->cca_pos = NULL; pos = cca_pos; pos = hostapd_eid_spatial_reuse(hapd, pos); pos = hostapd_eid_he_mu_edca_parameter_set(hapd, pos); pos = hostapd_eid_he_6ghz_band_cap(hapd, pos); } #endif /* CONFIG_IEEE80211AX */ #ifdef CONFIG_IEEE80211BE if (hapd->iconf->ieee80211be && !hapd->conf->disable_11be) { struct hostapd_data *ml_elem_ap = params->mld_ap ? params->mld_ap : hapd; if (ml_elem_ap->conf->mld_ap) pos = hostapd_eid_eht_ml_beacon( ml_elem_ap, params->mld_info, pos, !!params->mld_ap); pos = hostapd_eid_eht_capab(hapd, pos, IEEE80211_MODE_AP); pos = hostapd_eid_eht_operation(hapd, pos); } #endif /* CONFIG_IEEE80211BE */ #ifdef CONFIG_IEEE80211AC if (hapd->conf->vendor_vht) pos = hostapd_eid_vendor_vht(hapd, pos); #endif /* CONFIG_IEEE80211AC */ /* WPA / OSEN */ pos = hostapd_get_wpa_ie(hapd, pos, epos - pos); pos = hostapd_get_osen_ie(hapd, pos, epos - pos); /* Wi-Fi Alliance WMM */ pos = hostapd_eid_wmm(hapd, pos); #ifdef CONFIG_WPS if (hapd->conf->wps_state && hapd->wps_probe_resp_ie) { os_memcpy(pos, wpabuf_head(hapd->wps_probe_resp_ie), wpabuf_len(hapd->wps_probe_resp_ie)); pos += wpabuf_len(hapd->wps_probe_resp_ie); } #endif /* CONFIG_WPS */ #ifdef CONFIG_P2P if ((hapd->conf->p2p & P2P_ENABLED) && params->is_p2p && hapd->p2p_probe_resp_ie) { os_memcpy(pos, wpabuf_head(hapd->p2p_probe_resp_ie), wpabuf_len(hapd->p2p_probe_resp_ie)); pos += wpabuf_len(hapd->p2p_probe_resp_ie); } #endif /* CONFIG_P2P */ #ifdef CONFIG_P2P_MANAGER if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) == P2P_MANAGE) pos = hostapd_eid_p2p_manage(hapd, pos); #endif /* CONFIG_P2P_MANAGER */ #ifdef CONFIG_HS20 pos = hostapd_eid_hs20_indication(hapd, pos); #endif /* CONFIG_HS20 */ pos = hostapd_eid_mbo(hapd, pos, epos - pos); pos = hostapd_eid_owe_trans(hapd, pos, epos - pos); pos = hostapd_eid_dpp_cc(hapd, pos, epos - pos); if (hapd->conf->vendor_elements) { os_memcpy(pos, wpabuf_head(hapd->conf->vendor_elements), wpabuf_len(hapd->conf->vendor_elements)); pos += wpabuf_len(hapd->conf->vendor_elements); } #ifdef CONFIG_TESTING_OPTIONS if (hapd->conf->presp_elements) { os_memcpy(pos, wpabuf_head(hapd->conf->presp_elements), wpabuf_len(hapd->conf->presp_elements)); pos += wpabuf_len(hapd->conf->presp_elements); } #endif /* CONFIG_TESTING_OPTIONS */ return pos; } static void hostapd_gen_probe_resp(struct hostapd_data *hapd, struct probe_resp_params *params) { u8 *pos; size_t buflen; hapd = hostapd_mbssid_get_tx_bss(hapd); #define MAX_PROBERESP_LEN 768 buflen = MAX_PROBERESP_LEN; buflen += hostapd_probe_resp_elems_len(hapd, params); params->resp = os_zalloc(buflen); if (!params->resp) { params->resp_len = 0; return; } params->resp->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_PROBE_RESP); /* Unicast the response to all requests on bands other than 6 GHz. For * the 6 GHz, unicast is used only if the actual SSID is not included in * the Beacon frames. Otherwise, broadcast response is used per IEEE * Std 802.11ax-2021, 26.17.2.3.2. Broadcast address is also used for * the Probe Response frame template for the unsolicited (i.e., not as * a response to a specific request) case. */ if (params->req && (!is_6ghz_op_class(hapd->iconf->op_class) || hapd->conf->ignore_broadcast_ssid)) os_memcpy(params->resp->da, params->req->sa, ETH_ALEN); else os_memset(params->resp->da, 0xff, ETH_ALEN); os_memcpy(params->resp->sa, hapd->own_addr, ETH_ALEN); os_memcpy(params->resp->bssid, hapd->own_addr, ETH_ALEN); params->resp->u.probe_resp.beacon_int = host_to_le16(hapd->iconf->beacon_int); /* hardware or low-level driver will setup seq_ctrl and timestamp */ params->resp->u.probe_resp.capab_info = host_to_le16(hostapd_own_capab_info(hapd)); pos = hostapd_probe_resp_fill_elems(hapd, params, params->resp->u.probe_resp.variable, buflen); params->resp_len = pos - (u8 *) params->resp; } #ifdef CONFIG_IEEE80211BE static void hostapd_fill_probe_resp_ml_params(struct hostapd_data *hapd, struct probe_resp_params *params, const struct ieee80211_mgmt *mgmt, int mld_id, u16 links) { struct probe_resp_params sta_info_params; struct hostapd_data *link; params->mld_ap = NULL; params->mld_info = os_zalloc(sizeof(*params->mld_info)); if (!params->mld_info) return; wpa_printf(MSG_DEBUG, "MLD: Got ML probe request with AP MLD ID %d for links %04x", mld_id, links); for_each_mld_link(link, hapd) { struct mld_link_info *link_info; size_t buflen; u8 mld_link_id = link->mld_link_id; u8 *epos; u8 buf[EHT_ML_MAX_STA_PROF_LEN]; /* * Set mld_ap iff the ML probe request explicitly * requested a specific MLD ID. In that case, the targeted * AP may have been a nontransmitted BSSID on the same * interface. */ if (mld_id != -1 && link->iface == hapd->iface) params->mld_ap = link; /* Never duplicate main Probe Response frame body */ if (link == hapd) continue; /* Only include requested links */ if (!(BIT(mld_link_id) & links)) continue; link_info = ¶ms->mld_info->links[mld_link_id]; sta_info_params.req = params->req; sta_info_params.is_p2p = false; sta_info_params.is_ml_sta_info = true; sta_info_params.mld_ap = NULL; sta_info_params.mld_info = NULL; buflen = MAX_PROBERESP_LEN; buflen += hostapd_probe_resp_elems_len(link, &sta_info_params); if (buflen > EHT_ML_MAX_STA_PROF_LEN) { wpa_printf(MSG_DEBUG, "MLD: Not including link %d in ML probe response (%zu bytes is too long)", mld_link_id, buflen); goto fail; } /* * NOTE: This does not properly handle inheritance and * various other things. */ link_info->valid = true; epos = buf; /* Capabilities is the only fixed parameter */ WPA_PUT_LE16(epos, hostapd_own_capab_info(hapd)); epos += 2; epos = hostapd_probe_resp_fill_elems( link, &sta_info_params, epos, EHT_ML_MAX_STA_PROF_LEN - 2); link_info->resp_sta_profile_len = epos - buf; os_free(link_info->resp_sta_profile); link_info->resp_sta_profile = os_memdup( buf, link_info->resp_sta_profile_len); if (!link_info->resp_sta_profile) link_info->resp_sta_profile_len = 0; os_memcpy(link_info->local_addr, link->own_addr, ETH_ALEN); wpa_printf(MSG_DEBUG, "MLD: ML probe response includes link sta info for %d: %u bytes (estimate %zu)", mld_link_id, link_info->resp_sta_profile_len, buflen); } if (mld_id != -1 && !params->mld_ap) { wpa_printf(MSG_DEBUG, "MLD: No nontransmitted BSSID for MLD ID %d", mld_id); goto fail; } return; fail: hostapd_free_probe_resp_params(params); params->mld_ap = NULL; params->mld_info = NULL; } #endif /* CONFIG_IEEE80211BE */ enum ssid_match_result { NO_SSID_MATCH, EXACT_SSID_MATCH, WILDCARD_SSID_MATCH, CO_LOCATED_SSID_MATCH, }; static enum ssid_match_result ssid_match(struct hostapd_data *hapd, const u8 *ssid, size_t ssid_len, const u8 *ssid_list, size_t ssid_list_len, const u8 *short_ssid_list, size_t short_ssid_list_len) { const u8 *pos, *end; struct hostapd_iface *iface = hapd->iface; int wildcard = 0; size_t i, j; if (ssid_len == 0) wildcard = 1; if (ssid_len == hapd->conf->ssid.ssid_len && os_memcmp(ssid, hapd->conf->ssid.ssid, ssid_len) == 0) return EXACT_SSID_MATCH; if (ssid_list) { pos = ssid_list; end = ssid_list + ssid_list_len; while (end - pos >= 2) { if (2 + pos[1] > end - pos) break; if (pos[1] == 0) wildcard = 1; if (pos[1] == hapd->conf->ssid.ssid_len && os_memcmp(pos + 2, hapd->conf->ssid.ssid, pos[1]) == 0) return EXACT_SSID_MATCH; pos += 2 + pos[1]; } } if (short_ssid_list) { pos = short_ssid_list; end = short_ssid_list + short_ssid_list_len; while (end - pos >= 4) { if (hapd->conf->ssid.short_ssid == WPA_GET_LE32(pos)) return EXACT_SSID_MATCH; pos += 4; } } if (wildcard) return WILDCARD_SSID_MATCH; if (!iface->interfaces || iface->interfaces->count <= 1 || is_6ghz_op_class(hapd->iconf->op_class)) return NO_SSID_MATCH; for (i = 0; i < iface->interfaces->count; i++) { struct hostapd_iface *colocated; colocated = iface->interfaces->iface[i]; if (colocated == iface || !is_6ghz_op_class(colocated->conf->op_class)) continue; for (j = 0; j < colocated->num_bss; j++) { struct hostapd_bss_config *conf; conf = colocated->bss[j]->conf; if (ssid_len == conf->ssid.ssid_len && os_memcmp(ssid, conf->ssid.ssid, ssid_len) == 0) return CO_LOCATED_SSID_MATCH; } } return NO_SSID_MATCH; } void sta_track_expire(struct hostapd_iface *iface, int force) { struct os_reltime now; struct hostapd_sta_info *info; if (!iface->num_sta_seen) return; os_get_reltime(&now); while ((info = dl_list_first(&iface->sta_seen, struct hostapd_sta_info, list))) { if (!force && !os_reltime_expired(&now, &info->last_seen, iface->conf->track_sta_max_age)) break; force = 0; wpa_printf(MSG_MSGDUMP, "%s: Expire STA tracking entry for " MACSTR, iface->bss[0]->conf->iface, MAC2STR(info->addr)); dl_list_del(&info->list); iface->num_sta_seen--; sta_track_del(info); } } static struct hostapd_sta_info * sta_track_get(struct hostapd_iface *iface, const u8 *addr) { struct hostapd_sta_info *info; dl_list_for_each(info, &iface->sta_seen, struct hostapd_sta_info, list) if (ether_addr_equal(addr, info->addr)) return info; return NULL; } void sta_track_add(struct hostapd_iface *iface, const u8 *addr, int ssi_signal) { struct hostapd_sta_info *info; info = sta_track_get(iface, addr); if (info) { /* Move the most recent entry to the end of the list */ dl_list_del(&info->list); dl_list_add_tail(&iface->sta_seen, &info->list); os_get_reltime(&info->last_seen); info->ssi_signal = ssi_signal; return; } /* Add a new entry */ info = os_zalloc(sizeof(*info)); if (info == NULL) return; os_memcpy(info->addr, addr, ETH_ALEN); os_get_reltime(&info->last_seen); info->ssi_signal = ssi_signal; if (iface->num_sta_seen >= iface->conf->track_sta_max_num) { /* Expire oldest entry to make room for a new one */ sta_track_expire(iface, 1); } wpa_printf(MSG_MSGDUMP, "%s: Add STA tracking entry for " MACSTR, iface->bss[0]->conf->iface, MAC2STR(addr)); dl_list_add_tail(&iface->sta_seen, &info->list); iface->num_sta_seen++; } struct hostapd_data * sta_track_seen_on(struct hostapd_iface *iface, const u8 *addr, const char *ifname) { struct hapd_interfaces *interfaces = iface->interfaces; size_t i, j; for (i = 0; i < interfaces->count; i++) { struct hostapd_data *hapd = NULL; iface = interfaces->iface[i]; for (j = 0; j < iface->num_bss; j++) { hapd = iface->bss[j]; if (os_strcmp(ifname, hapd->conf->iface) == 0) break; hapd = NULL; } if (hapd && sta_track_get(iface, addr)) return hapd; } return NULL; } #ifdef CONFIG_TAXONOMY void sta_track_claim_taxonomy_info(struct hostapd_iface *iface, const u8 *addr, struct wpabuf **probe_ie_taxonomy) { struct hostapd_sta_info *info; info = sta_track_get(iface, addr); if (!info) return; wpabuf_free(*probe_ie_taxonomy); *probe_ie_taxonomy = info->probe_ie_taxonomy; info->probe_ie_taxonomy = NULL; } #endif /* CONFIG_TAXONOMY */ #ifdef CONFIG_IEEE80211BE static bool parse_ml_probe_req(const struct ieee80211_eht_ml *ml, size_t ml_len, int *mld_id, u16 *links) { u16 ml_control; const struct element *sub; const u8 *pos; size_t len; *mld_id = -1; *links = 0xffff; if (ml_len < sizeof(struct ieee80211_eht_ml)) return false; ml_control = le_to_host16(ml->ml_control); if ((ml_control & MULTI_LINK_CONTROL_TYPE_MASK) != MULTI_LINK_CONTROL_TYPE_PROBE_REQ) { wpa_printf(MSG_DEBUG, "MLD: Not an ML probe req"); return false; } if (sizeof(struct ieee80211_eht_ml) + 1 > ml_len) { wpa_printf(MSG_DEBUG, "MLD: ML probe req too short"); return false; } pos = ml->variable; len = pos[0]; if (len < 1 || sizeof(struct ieee80211_eht_ml) + len > ml_len) { wpa_printf(MSG_DEBUG, "MLD: ML probe request with invalid length"); return false; } if (ml_control & EHT_ML_PRES_BM_PROBE_REQ_AP_MLD_ID) { if (len < 2) { wpa_printf(MSG_DEBUG, "MLD: ML probe req too short for MLD ID"); return false; } *mld_id = pos[1]; } pos += len; /* Parse subelements (if there are any) */ len = ml_len - len - sizeof(struct ieee80211_eht_ml); for_each_element_id(sub, 0, pos, len) { const struct ieee80211_eht_per_sta_profile *sta; u16 sta_control; if (*links == 0xffff) *links = 0; if (sub->datalen < sizeof(struct ieee80211_eht_per_sta_profile)) { wpa_printf(MSG_DEBUG, "MLD: ML probe req %d too short for sta profile", sub->datalen); return false; } sta = (struct ieee80211_eht_per_sta_profile *) sub->data; /* * Extract the link ID, do not return whether a complete or * partial profile was requested. */ sta_control = le_to_host16(sta->sta_control); *links |= BIT(sta_control & EHT_PER_STA_CTRL_LINK_ID_MSK); } if (!for_each_element_completed(sub, pos, len)) { wpa_printf(MSG_DEBUG, "MLD: ML probe req sub-elements parsing error"); return false; } return true; } #endif /* CONFIG_IEEE80211BE */ void handle_probe_req(struct hostapd_data *hapd, const struct ieee80211_mgmt *mgmt, size_t len, int ssi_signal) { struct ieee802_11_elems elems; const u8 *ie; size_t ie_len; size_t i; int noack; enum ssid_match_result res; int ret; u16 csa_offs[2]; size_t csa_offs_len; struct radius_sta rad_info; struct probe_resp_params params; #ifdef CONFIG_IEEE80211BE int mld_id; u16 links; #endif /* CONFIG_IEEE80211BE */ if (hapd->iconf->rssi_ignore_probe_request && ssi_signal && ssi_signal < hapd->iconf->rssi_ignore_probe_request) return; if (len < IEEE80211_HDRLEN) return; ie = ((const u8 *) mgmt) + IEEE80211_HDRLEN; if (hapd->iconf->track_sta_max_num) sta_track_add(hapd->iface, mgmt->sa, ssi_signal); ie_len = len - IEEE80211_HDRLEN; ret = hostapd_allowed_address(hapd, mgmt->sa, (const u8 *) mgmt, len, &rad_info, 1); if (ret == HOSTAPD_ACL_REJECT) { wpa_msg(hapd->msg_ctx, MSG_DEBUG, "Ignore Probe Request frame from " MACSTR " due to ACL reject ", MAC2STR(mgmt->sa)); return; } for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++) if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx, mgmt->sa, mgmt->da, mgmt->bssid, ie, ie_len, ssi_signal) > 0) return; if (!hapd->conf->send_probe_response) return; if (ieee802_11_parse_elems(ie, ie_len, &elems, 0) == ParseFailed) { wpa_printf(MSG_DEBUG, "Could not parse ProbeReq from " MACSTR, MAC2STR(mgmt->sa)); return; } if ((!elems.ssid || !elems.supp_rates)) { wpa_printf(MSG_DEBUG, "STA " MACSTR " sent probe request " "without SSID or supported rates element", MAC2STR(mgmt->sa)); return; } /* * No need to reply if the Probe Request frame was sent on an adjacent * channel. IEEE Std 802.11-2012 describes this as a requirement for an * AP with dot11RadioMeasurementActivated set to true, but strictly * speaking does not allow such ignoring of Probe Request frames if * dot11RadioMeasurementActivated is false. Anyway, this can help reduce * number of unnecessary Probe Response frames for cases where the STA * is less likely to see them (Probe Request frame sent on a * neighboring, but partially overlapping, channel). */ if (elems.ds_params && hapd->iface->current_mode && (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G || hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211B) && hapd->iconf->channel != elems.ds_params[0]) { wpa_printf(MSG_DEBUG, "Ignore Probe Request due to DS Params mismatch: chan=%u != ds.chan=%u", hapd->iconf->channel, elems.ds_params[0]); return; } #ifdef CONFIG_P2P if (hapd->p2p && hapd->p2p_group && elems.wps_ie) { struct wpabuf *wps; wps = ieee802_11_vendor_ie_concat(ie, ie_len, WPS_DEV_OUI_WFA); if (wps && !p2p_group_match_dev_type(hapd->p2p_group, wps)) { wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request " "due to mismatch with Requested Device " "Type"); wpabuf_free(wps); return; } wpabuf_free(wps); } if (hapd->p2p && hapd->p2p_group && elems.p2p) { struct wpabuf *p2p; p2p = ieee802_11_vendor_ie_concat(ie, ie_len, P2P_IE_VENDOR_TYPE); if (p2p && !p2p_group_match_dev_id(hapd->p2p_group, p2p)) { wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request " "due to mismatch with Device ID"); wpabuf_free(p2p); return; } wpabuf_free(p2p); } #endif /* CONFIG_P2P */ if (hapd->conf->ignore_broadcast_ssid && elems.ssid_len == 0 && elems.ssid_list_len == 0 && elems.short_ssid_list_len == 0) { wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR " for " "broadcast SSID ignored", MAC2STR(mgmt->sa)); return; } #ifdef CONFIG_P2P if ((hapd->conf->p2p & P2P_GROUP_OWNER) && elems.ssid_len == P2P_WILDCARD_SSID_LEN && os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) == 0) { /* Process P2P Wildcard SSID like Wildcard SSID */ elems.ssid_len = 0; } #endif /* CONFIG_P2P */ #ifdef CONFIG_TAXONOMY { struct sta_info *sta; struct hostapd_sta_info *info; if ((sta = ap_get_sta(hapd, mgmt->sa)) != NULL) { taxonomy_sta_info_probe_req(hapd, sta, ie, ie_len); } else if ((info = sta_track_get(hapd->iface, mgmt->sa)) != NULL) { taxonomy_hostapd_sta_info_probe_req(hapd, info, ie, ie_len); } } #endif /* CONFIG_TAXONOMY */ res = ssid_match(hapd, elems.ssid, elems.ssid_len, elems.ssid_list, elems.ssid_list_len, elems.short_ssid_list, elems.short_ssid_list_len); if (res == NO_SSID_MATCH) { if (!(mgmt->da[0] & 0x01)) { wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR " for foreign SSID '%s' (DA " MACSTR ")%s", MAC2STR(mgmt->sa), wpa_ssid_txt(elems.ssid, elems.ssid_len), MAC2STR(mgmt->da), elems.ssid_list ? " (SSID list)" : ""); } return; } if (hapd->conf->ignore_broadcast_ssid && res == WILDCARD_SSID_MATCH) { wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR " for " "broadcast SSID ignored", MAC2STR(mgmt->sa)); return; } #ifdef CONFIG_INTERWORKING if (hapd->conf->interworking && elems.interworking && elems.interworking_len >= 1) { u8 ant = elems.interworking[0] & 0x0f; if (ant != INTERWORKING_ANT_WILDCARD && ant != hapd->conf->access_network_type) { wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR " for mismatching ANT %u ignored", MAC2STR(mgmt->sa), ant); return; } } if (hapd->conf->interworking && elems.interworking && (elems.interworking_len == 7 || elems.interworking_len == 9)) { const u8 *hessid; if (elems.interworking_len == 7) hessid = elems.interworking + 1; else hessid = elems.interworking + 1 + 2; if (!is_broadcast_ether_addr(hessid) && !ether_addr_equal(hessid, hapd->conf->hessid)) { wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR " for mismatching HESSID " MACSTR " ignored", MAC2STR(mgmt->sa), MAC2STR(hessid)); return; } } #endif /* CONFIG_INTERWORKING */ #ifdef CONFIG_P2P if ((hapd->conf->p2p & P2P_GROUP_OWNER) && supp_rates_11b_only(&elems)) { /* Indicates support for 11b rates only */ wpa_printf(MSG_EXCESSIVE, "P2P: Ignore Probe Request from " MACSTR " with only 802.11b rates", MAC2STR(mgmt->sa)); return; } #endif /* CONFIG_P2P */ /* TODO: verify that supp_rates contains at least one matching rate * with AP configuration */ if (hapd->conf->no_probe_resp_if_seen_on && is_multicast_ether_addr(mgmt->da) && is_multicast_ether_addr(mgmt->bssid) && sta_track_seen_on(hapd->iface, mgmt->sa, hapd->conf->no_probe_resp_if_seen_on)) { wpa_printf(MSG_MSGDUMP, "%s: Ignore Probe Request from " MACSTR " since STA has been seen on %s", hapd->conf->iface, MAC2STR(mgmt->sa), hapd->conf->no_probe_resp_if_seen_on); return; } if (hapd->conf->no_probe_resp_if_max_sta && is_multicast_ether_addr(mgmt->da) && is_multicast_ether_addr(mgmt->bssid) && hapd->num_sta >= hapd->conf->max_num_sta && !ap_get_sta(hapd, mgmt->sa)) { wpa_printf(MSG_MSGDUMP, "%s: Ignore Probe Request from " MACSTR " since no room for additional STA", hapd->conf->iface, MAC2STR(mgmt->sa)); return; } #ifdef CONFIG_TESTING_OPTIONS if (hapd->iconf->ignore_probe_probability > 0.0 && drand48() < hapd->iconf->ignore_probe_probability) { wpa_printf(MSG_INFO, "TESTING: ignoring probe request from " MACSTR, MAC2STR(mgmt->sa)); return; } #endif /* CONFIG_TESTING_OPTIONS */ /* Do not send Probe Response frame from a non-transmitting multiple * BSSID profile unless the Probe Request frame is directed at that * particular BSS. */ if (hapd != hostapd_mbssid_get_tx_bss(hapd) && res != EXACT_SSID_MATCH) return; wpa_msg_ctrl(hapd->msg_ctx, MSG_INFO, RX_PROBE_REQUEST "sa=" MACSTR " signal=%d", MAC2STR(mgmt->sa), ssi_signal); os_memset(¶ms, 0, sizeof(params)); #ifdef CONFIG_IEEE80211BE if (hapd->conf->mld_ap && elems.probe_req_mle && parse_ml_probe_req((struct ieee80211_eht_ml *) elems.probe_req_mle, elems.probe_req_mle_len, &mld_id, &links)) { hostapd_fill_probe_resp_ml_params(hapd, ¶ms, mgmt, mld_id, links); } #endif /* CONFIG_IEEE80211BE */ params.req = mgmt; params.is_p2p = !!elems.p2p; params.known_bss = elems.mbssid_known_bss; params.known_bss_len = elems.mbssid_known_bss_len; params.is_ml_sta_info = false; hostapd_gen_probe_resp(hapd, ¶ms); hostapd_free_probe_resp_params(¶ms); if (!params.resp) return; /* * If this is a broadcast probe request, apply no ack policy to avoid * excessive retries. */ noack = !!(res == WILDCARD_SSID_MATCH && is_broadcast_ether_addr(mgmt->da)); csa_offs_len = 0; if (hapd->csa_in_progress) { if (params.csa_pos) csa_offs[csa_offs_len++] = params.csa_pos - (u8 *) params.resp; if (params.ecsa_pos) csa_offs[csa_offs_len++] = params.ecsa_pos - (u8 *) params.resp; } ret = hostapd_drv_send_mlme(hapd, params.resp, params.resp_len, noack, csa_offs_len ? csa_offs : NULL, csa_offs_len, 0); if (ret < 0) wpa_printf(MSG_INFO, "handle_probe_req: send failed"); os_free(params.resp); wpa_printf(MSG_EXCESSIVE, "STA " MACSTR " sent probe request for %s " "SSID", MAC2STR(mgmt->sa), elems.ssid_len == 0 ? "broadcast" : "our"); } static u8 * hostapd_probe_resp_offloads(struct hostapd_data *hapd, size_t *resp_len) { struct probe_resp_params params; /* check probe response offloading caps and print warnings */ if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_PROBE_RESP_OFFLOAD)) return NULL; #ifdef CONFIG_WPS if (hapd->conf->wps_state && hapd->wps_probe_resp_ie && (!(hapd->iface->probe_resp_offloads & (WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS | WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS2)))) wpa_printf(MSG_WARNING, "Device is trying to offload WPS " "Probe Response while not supporting this"); #endif /* CONFIG_WPS */ #ifdef CONFIG_P2P if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_probe_resp_ie && !(hapd->iface->probe_resp_offloads & WPA_DRIVER_PROBE_RESP_OFFLOAD_P2P)) wpa_printf(MSG_WARNING, "Device is trying to offload P2P " "Probe Response while not supporting this"); #endif /* CONFIG_P2P */ if (hapd->conf->interworking && !(hapd->iface->probe_resp_offloads & WPA_DRIVER_PROBE_RESP_OFFLOAD_INTERWORKING)) wpa_printf(MSG_WARNING, "Device is trying to offload " "Interworking Probe Response while not supporting " "this"); /* Generate a Probe Response template for the non-P2P case */ os_memset(¶ms, 0, sizeof(params)); params.req = NULL; params.is_p2p = false; params.known_bss = NULL; params.known_bss_len = 0; params.is_ml_sta_info = false; params.mld_ap = NULL; params.mld_info = NULL; hostapd_gen_probe_resp(hapd, ¶ms); *resp_len = params.resp_len; if (!params.resp) return NULL; /* TODO: Avoid passing these through struct hostapd_data */ if (params.csa_pos) hapd->cs_c_off_proberesp = params.csa_pos - (u8 *) params.resp; if (params.ecsa_pos) hapd->cs_c_off_ecsa_proberesp = params.ecsa_pos - (u8 *) params.resp; #ifdef CONFIG_IEEE80211AX if (params.cca_pos) hapd->cca_c_off_proberesp = params.cca_pos - (u8 *) params.resp; #endif /* CONFIG_IEEE80211AX */ return (u8 *) params.resp; } #endif /* NEED_AP_MLME */ #ifdef CONFIG_IEEE80211AX /* Unsolicited broadcast Probe Response transmission, 6 GHz only */ u8 * hostapd_unsol_bcast_probe_resp(struct hostapd_data *hapd, struct unsol_bcast_probe_resp *ubpr) { struct probe_resp_params probe_params; if (!is_6ghz_op_class(hapd->iconf->op_class)) return NULL; ubpr->unsol_bcast_probe_resp_interval = hapd->conf->unsol_bcast_probe_resp_interval; os_memset(&probe_params, 0, sizeof(probe_params)); probe_params.req = NULL; probe_params.is_p2p = false; probe_params.known_bss = NULL; probe_params.known_bss_len = 0; probe_params.is_ml_sta_info = false; probe_params.mld_ap = NULL; probe_params.mld_info = NULL; hostapd_gen_probe_resp(hapd, &probe_params); ubpr->unsol_bcast_probe_resp_tmpl_len = probe_params.resp_len; return (u8 *) probe_params.resp; } #endif /* CONFIG_IEEE80211AX */ void sta_track_del(struct hostapd_sta_info *info) { #ifdef CONFIG_TAXONOMY wpabuf_free(info->probe_ie_taxonomy); info->probe_ie_taxonomy = NULL; #endif /* CONFIG_TAXONOMY */ os_free(info); } #ifdef CONFIG_FILS static u16 hostapd_gen_fils_discovery_phy_index(struct hostapd_data *hapd) { #ifdef CONFIG_IEEE80211BE if (hapd->iconf->ieee80211be && !hapd->conf->disable_11be) return FD_CAP_PHY_INDEX_EHT; #endif /* CONFIG_IEEE80211BE */ #ifdef CONFIG_IEEE80211AX if (hapd->iconf->ieee80211ax && !hapd->conf->disable_11ax) return FD_CAP_PHY_INDEX_HE; #endif /* CONFIG_IEEE80211AX */ #ifdef CONFIG_IEEE80211AC if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) return FD_CAP_PHY_INDEX_VHT; #endif /* CONFIG_IEEE80211AC */ if (hapd->iconf->ieee80211n && !hapd->conf->disable_11n) return FD_CAP_PHY_INDEX_HT; return 0; } static u16 hostapd_gen_fils_discovery_nss(struct hostapd_hw_modes *mode, u16 phy_index, u8 he_mcs_nss_size) { u16 nss = 0; if (!mode) return 0; if (phy_index == FD_CAP_PHY_INDEX_HE) { const u8 *he_mcs = mode->he_capab[IEEE80211_MODE_AP].mcs; int i; u16 mcs[6]; os_memset(mcs, 0xff, 6 * sizeof(u16)); if (he_mcs_nss_size == 4) { mcs[0] = WPA_GET_LE16(&he_mcs[0]); mcs[1] = WPA_GET_LE16(&he_mcs[2]); } if (he_mcs_nss_size == 8) { mcs[2] = WPA_GET_LE16(&he_mcs[4]); mcs[3] = WPA_GET_LE16(&he_mcs[6]); } if (he_mcs_nss_size == 12) { mcs[4] = WPA_GET_LE16(&he_mcs[8]); mcs[5] = WPA_GET_LE16(&he_mcs[10]); } for (i = 0; i < HE_NSS_MAX_STREAMS; i++) { u16 nss_mask = 0x3 << (i * 2); /* * If Tx and/or Rx indicate support for a given NSS, * count it towards the maximum NSS. */ if (he_mcs_nss_size == 4 && (((mcs[0] & nss_mask) != nss_mask) || ((mcs[1] & nss_mask) != nss_mask))) { nss++; continue; } if (he_mcs_nss_size == 8 && (((mcs[2] & nss_mask) != nss_mask) || ((mcs[3] & nss_mask) != nss_mask))) { nss++; continue; } if (he_mcs_nss_size == 12 && (((mcs[4] & nss_mask) != nss_mask) || ((mcs[5] & nss_mask) != nss_mask))) { nss++; continue; } } } else if (phy_index == FD_CAP_PHY_INDEX_EHT) { u8 rx_nss, tx_nss, max_nss = 0, i; u8 *mcs = mode->eht_capab[IEEE80211_MODE_AP].mcs; /* * The Supported EHT-MCS And NSS Set field for the AP contains * one to three EHT-MCS Map fields based on the supported * bandwidth. Check the first byte (max NSS for Rx/Tx that * supports EHT-MCS 0-9) for each bandwidth (<= 80, * 160, 320) to find the maximum NSS. This assumes that * the lowest MCS rates support the largest number of spatial * streams. If values are different between Tx, Rx or the * bandwidths, choose the highest value. */ for (i = 0; i < 3; i++) { rx_nss = mcs[3 * i] & 0x0F; if (rx_nss > max_nss) max_nss = rx_nss; tx_nss = (mcs[3 * i] & 0xF0) >> 4; if (tx_nss > max_nss) max_nss = tx_nss; } nss = max_nss; } if (nss > 4) return FD_CAP_NSS_5_8 << FD_CAP_NSS_SHIFT; if (nss) return (nss - 1) << FD_CAP_NSS_SHIFT; return 0; } static u16 hostapd_fils_discovery_cap(struct hostapd_data *hapd) { u16 cap_info, phy_index; u8 chwidth = FD_CAP_BSS_CHWIDTH_20, he_mcs_nss_size = 4; struct hostapd_hw_modes *mode = hapd->iface->current_mode; cap_info = FD_CAP_ESS; if (hapd->conf->wpa) cap_info |= FD_CAP_PRIVACY; if (is_6ghz_op_class(hapd->iconf->op_class)) { switch (hapd->iconf->op_class) { case 137: chwidth = FD_CAP_BSS_CHWIDTH_320; break; case 135: he_mcs_nss_size += 4; /* fallthrough */ case 134: he_mcs_nss_size += 4; chwidth = FD_CAP_BSS_CHWIDTH_160_80_80; break; case 133: chwidth = FD_CAP_BSS_CHWIDTH_80; break; case 132: chwidth = FD_CAP_BSS_CHWIDTH_40; break; } } else { switch (hostapd_get_oper_chwidth(hapd->iconf)) { case CONF_OPER_CHWIDTH_80P80MHZ: he_mcs_nss_size += 4; /* fallthrough */ case CONF_OPER_CHWIDTH_160MHZ: he_mcs_nss_size += 4; chwidth = FD_CAP_BSS_CHWIDTH_160_80_80; break; case CONF_OPER_CHWIDTH_80MHZ: chwidth = FD_CAP_BSS_CHWIDTH_80; break; case CONF_OPER_CHWIDTH_USE_HT: if (hapd->iconf->secondary_channel) chwidth = FD_CAP_BSS_CHWIDTH_40; else chwidth = FD_CAP_BSS_CHWIDTH_20; break; default: break; } } phy_index = hostapd_gen_fils_discovery_phy_index(hapd); cap_info |= phy_index << FD_CAP_PHY_INDEX_SHIFT; cap_info |= chwidth << FD_CAP_BSS_CHWIDTH_SHIFT; cap_info |= hostapd_gen_fils_discovery_nss(mode, phy_index, he_mcs_nss_size); return cap_info; } static u8 * hostapd_gen_fils_discovery(struct hostapd_data *hapd, size_t *len) { struct ieee80211_mgmt *head; const u8 *mobility_domain; u8 *pos, *length_pos, buf[200]; u16 ctl = 0; u8 fd_rsn_info[5]; size_t total_len, buf_len; total_len = 24 + 2 + 12; /* FILS Discovery Frame Control */ ctl = (sizeof(hapd->conf->ssid.short_ssid) - 1) | FD_FRAME_CTL_SHORT_SSID_PRESENT | FD_FRAME_CTL_LENGTH_PRESENT | FD_FRAME_CTL_CAP_PRESENT; total_len += 4 + 1 + 2; /* Fill primary channel information for 6 GHz channels with over 20 MHz * bandwidth, if the primary channel is not a PSC */ if (is_6ghz_op_class(hapd->iconf->op_class) && !is_6ghz_psc_frequency(ieee80211_chan_to_freq( NULL, hapd->iconf->op_class, hapd->iconf->channel)) && op_class_to_bandwidth(hapd->iconf->op_class) > 20) { ctl |= FD_FRAME_CTL_PRI_CHAN_PRESENT; total_len += 2; } /* Check for optional subfields and calculate length */ if (wpa_auth_write_fd_rsn_info(hapd->wpa_auth, fd_rsn_info)) { ctl |= FD_FRAME_CTL_RSN_INFO_PRESENT; total_len += sizeof(fd_rsn_info); } mobility_domain = hostapd_wpa_ie(hapd, WLAN_EID_MOBILITY_DOMAIN); if (mobility_domain) { ctl |= FD_FRAME_CTL_MD_PRESENT; total_len += 3; } total_len += hostapd_eid_rnr_len(hapd, WLAN_FC_STYPE_ACTION, true); pos = hostapd_eid_fils_indic(hapd, buf, 0); buf_len = pos - buf; total_len += buf_len; /* he_elem_len() may return too large a value for FD frame, but that is * fine here since this is used as the maximum length of the buffer. */ total_len += he_elem_len(hapd); head = os_zalloc(total_len); if (!head) return NULL; head->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_ACTION); os_memset(head->da, 0xff, ETH_ALEN); os_memcpy(head->sa, hapd->own_addr, ETH_ALEN); os_memcpy(head->bssid, hapd->own_addr, ETH_ALEN); head->u.action.category = WLAN_ACTION_PUBLIC; head->u.action.u.public_action.action = WLAN_PA_FILS_DISCOVERY; pos = &head->u.action.u.public_action.variable[0]; /* FILS Discovery Information field */ /* FILS Discovery Frame Control */ WPA_PUT_LE16(pos, ctl); pos += 2; /* Hardware or low-level driver will fill in the Timestamp value */ pos += 8; /* Beacon Interval */ WPA_PUT_LE16(pos, hapd->iconf->beacon_int); pos += 2; /* Short SSID */ WPA_PUT_LE32(pos, hapd->conf->ssid.short_ssid); pos += sizeof(hapd->conf->ssid.short_ssid); /* Store position of FILS discovery information element Length field */ length_pos = pos++; /* FD Capability */ WPA_PUT_LE16(pos, hostapd_fils_discovery_cap(hapd)); pos += 2; /* Operating Class and Primary Channel - if a 6 GHz chan is non PSC */ if (ctl & FD_FRAME_CTL_PRI_CHAN_PRESENT) { *pos++ = hapd->iconf->op_class; *pos++ = hapd->iconf->channel; } /* AP Configuration Sequence Number - not present */ /* Access Network Options - not present */ /* FD RSN Information */ if (ctl & FD_FRAME_CTL_RSN_INFO_PRESENT) { os_memcpy(pos, fd_rsn_info, sizeof(fd_rsn_info)); pos += sizeof(fd_rsn_info); } /* Channel Center Frequency Segment 1 - not present */ /* Mobility Domain */ if (ctl & FD_FRAME_CTL_MD_PRESENT) { os_memcpy(pos, &mobility_domain[2], 3); pos += 3; } /* Fill in the Length field value */ *length_pos = pos - (length_pos + 1); pos = hostapd_eid_rnr(hapd, pos, WLAN_FC_STYPE_ACTION, true); /* FILS Indication element */ if (buf_len) { os_memcpy(pos, buf, buf_len); pos += buf_len; } if (is_6ghz_op_class(hapd->iconf->op_class)) pos = hostapd_eid_txpower_envelope(hapd, pos); *len = pos - (u8 *) head; wpa_hexdump(MSG_DEBUG, "FILS Discovery frame template", head, pos - (u8 *) head); return (u8 *) head; } /* Configure FILS Discovery frame transmission parameters */ static u8 * hostapd_fils_discovery(struct hostapd_data *hapd, struct wpa_driver_ap_params *params) { params->fd_max_int = hapd->conf->fils_discovery_max_int; if (is_6ghz_op_class(hapd->iconf->op_class) && params->fd_max_int > FD_MAX_INTERVAL_6GHZ) params->fd_max_int = FD_MAX_INTERVAL_6GHZ; params->fd_min_int = hapd->conf->fils_discovery_min_int; if (params->fd_min_int > params->fd_max_int) params->fd_min_int = params->fd_max_int; if (params->fd_max_int) return hostapd_gen_fils_discovery(hapd, ¶ms->fd_frame_tmpl_len); return NULL; } #endif /* CONFIG_FILS */ int ieee802_11_build_ap_params(struct hostapd_data *hapd, struct wpa_driver_ap_params *params) { struct ieee80211_mgmt *head = NULL; u8 *tail = NULL; size_t head_len = 0, tail_len = 0; u8 *resp = NULL; size_t resp_len = 0; #ifdef NEED_AP_MLME u16 capab_info; u8 *pos, *tailpos, *tailend, *csa_pos; bool complete = false; #endif /* NEED_AP_MLME */ os_memset(params, 0, sizeof(*params)); #ifdef NEED_AP_MLME #define BEACON_HEAD_BUF_SIZE 256 #define BEACON_TAIL_BUF_SIZE 512 head = os_zalloc(BEACON_HEAD_BUF_SIZE); tail_len = BEACON_TAIL_BUF_SIZE; #ifdef CONFIG_WPS if (hapd->conf->wps_state && hapd->wps_beacon_ie) tail_len += wpabuf_len(hapd->wps_beacon_ie); #endif /* CONFIG_WPS */ #ifdef CONFIG_P2P if (hapd->p2p_beacon_ie) tail_len += wpabuf_len(hapd->p2p_beacon_ie); #endif /* CONFIG_P2P */ #ifdef CONFIG_FST if (hapd->iface->fst_ies) tail_len += wpabuf_len(hapd->iface->fst_ies); #endif /* CONFIG_FST */ if (hapd->conf->vendor_elements) tail_len += wpabuf_len(hapd->conf->vendor_elements); #ifdef CONFIG_IEEE80211AC if (hapd->conf->vendor_vht) { tail_len += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) + 2 + sizeof(struct ieee80211_vht_operation); } #endif /* CONFIG_IEEE80211AC */ tail_len += he_elem_len(hapd); #ifdef CONFIG_IEEE80211BE if (hapd->iconf->ieee80211be && !hapd->conf->disable_11be) { tail_len += hostapd_eid_eht_capab_len(hapd, IEEE80211_MODE_AP); tail_len += 3 + sizeof(struct ieee80211_eht_operation); if (hapd->iconf->punct_bitmap) tail_len += EHT_OPER_DISABLED_SUBCHAN_BITMAP_SIZE; /* * TODO: Multi-Link element has variable length and can be * long based on the common info and number of per * station profiles. For now use 256. */ if (hapd->conf->mld_ap) tail_len += 256; } #endif /* CONFIG_IEEE80211BE */ if (hapd->iconf->mbssid == ENHANCED_MBSSID_ENABLED && hapd == hostapd_mbssid_get_tx_bss(hapd)) tail_len += 5; /* Multiple BSSID Configuration element */ tail_len += hostapd_eid_rnr_len(hapd, WLAN_FC_STYPE_BEACON, true); tail_len += hostapd_mbo_ie_len(hapd); tail_len += hostapd_eid_owe_trans_len(hapd); tail_len += hostapd_eid_dpp_cc_len(hapd); tailpos = tail = os_malloc(tail_len); if (head == NULL || tail == NULL) { wpa_printf(MSG_ERROR, "Failed to set beacon data"); os_free(head); os_free(tail); return -1; } tailend = tail + tail_len; head->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_BEACON); head->duration = host_to_le16(0); os_memset(head->da, 0xff, ETH_ALEN); os_memcpy(head->sa, hapd->own_addr, ETH_ALEN); os_memcpy(head->bssid, hapd->own_addr, ETH_ALEN); head->u.beacon.beacon_int = host_to_le16(hapd->iconf->beacon_int); /* hardware or low-level driver will setup seq_ctrl and timestamp */ capab_info = hostapd_own_capab_info(hapd); head->u.beacon.capab_info = host_to_le16(capab_info); pos = &head->u.beacon.variable[0]; /* SSID */ *pos++ = WLAN_EID_SSID; if (hapd->conf->ignore_broadcast_ssid == 2) { /* clear the data, but keep the correct length of the SSID */ *pos++ = hapd->conf->ssid.ssid_len; os_memset(pos, 0, hapd->conf->ssid.ssid_len); pos += hapd->conf->ssid.ssid_len; } else if (hapd->conf->ignore_broadcast_ssid) { *pos++ = 0; /* empty SSID */ } else { *pos++ = hapd->conf->ssid.ssid_len; os_memcpy(pos, hapd->conf->ssid.ssid, hapd->conf->ssid.ssid_len); pos += hapd->conf->ssid.ssid_len; } /* Supported rates */ pos = hostapd_eid_supp_rates(hapd, pos); /* DS Params */ pos = hostapd_eid_ds_params(hapd, pos); head_len = pos - (u8 *) head; tailpos = hostapd_eid_country(hapd, tailpos, tailend - tailpos); /* Power Constraint element */ tailpos = hostapd_eid_pwr_constraint(hapd, tailpos); /* CSA IE */ csa_pos = hostapd_eid_csa(hapd, tailpos); if (csa_pos != tailpos) hapd->cs_c_off_beacon = csa_pos - tail - 1; tailpos = csa_pos; /* ERP Information element */ tailpos = hostapd_eid_erp_info(hapd, tailpos); /* Extended supported rates */ tailpos = hostapd_eid_ext_supp_rates(hapd, tailpos); tailpos = hostapd_get_rsne(hapd, tailpos, tailend - tailpos); tailpos = hostapd_eid_bss_load(hapd, tailpos, tailend - tailpos); tailpos = hostapd_eid_rm_enabled_capab(hapd, tailpos, tailend - tailpos); tailpos = hostapd_get_mde(hapd, tailpos, tailend - tailpos); /* eCSA IE */ csa_pos = hostapd_eid_ecsa(hapd, tailpos); if (csa_pos != tailpos) hapd->cs_c_off_ecsa_beacon = csa_pos - tail - 1; tailpos = csa_pos; tailpos = hostapd_eid_supported_op_classes(hapd, tailpos); tailpos = hostapd_eid_ht_capabilities(hapd, tailpos); tailpos = hostapd_eid_ht_operation(hapd, tailpos); if (hapd->iconf->mbssid && hapd->iconf->num_bss > 1) { if (ieee802_11_build_ap_params_mbssid(hapd, params)) { os_free(head); os_free(tail); wpa_printf(MSG_ERROR, "MBSSID: Failed to set beacon data"); return -1; } complete = hapd->iconf->mbssid == MBSSID_ENABLED || (hapd->iconf->mbssid == ENHANCED_MBSSID_ENABLED && params->mbssid_elem_count == 1); } tailpos = hostapd_eid_ext_capab(hapd, tailpos, complete); /* * TODO: Time Advertisement element should only be included in some * DTIM Beacon frames. */ tailpos = hostapd_eid_time_adv(hapd, tailpos); tailpos = hostapd_eid_interworking(hapd, tailpos); tailpos = hostapd_eid_adv_proto(hapd, tailpos); tailpos = hostapd_eid_roaming_consortium(hapd, tailpos); #ifdef CONFIG_FST if (hapd->iface->fst_ies) { os_memcpy(tailpos, wpabuf_head(hapd->iface->fst_ies), wpabuf_len(hapd->iface->fst_ies)); tailpos += wpabuf_len(hapd->iface->fst_ies); } #endif /* CONFIG_FST */ #ifdef CONFIG_IEEE80211AC if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac && !is_6ghz_op_class(hapd->iconf->op_class)) { tailpos = hostapd_eid_vht_capabilities(hapd, tailpos, 0); tailpos = hostapd_eid_vht_operation(hapd, tailpos); tailpos = hostapd_eid_txpower_envelope(hapd, tailpos); } #endif /* CONFIG_IEEE80211AC */ #ifdef CONFIG_IEEE80211AX if (hapd->iconf->ieee80211ax && !hapd->conf->disable_11ax && is_6ghz_op_class(hapd->iconf->op_class)) tailpos = hostapd_eid_txpower_envelope(hapd, tailpos); #endif /* CONFIG_IEEE80211AX */ tailpos = hostapd_eid_wb_chsw_wrapper(hapd, tailpos); tailpos = hostapd_eid_rnr(hapd, tailpos, WLAN_FC_STYPE_BEACON, true); tailpos = hostapd_eid_fils_indic(hapd, tailpos, 0); tailpos = hostapd_get_rsnxe(hapd, tailpos, tailend - tailpos); tailpos = hostapd_eid_mbssid_config(hapd, tailpos, params->mbssid_elem_count); #ifdef CONFIG_IEEE80211AX if (hapd->iconf->ieee80211ax && !hapd->conf->disable_11ax) { u8 *cca_pos; tailpos = hostapd_eid_he_capab(hapd, tailpos, IEEE80211_MODE_AP); tailpos = hostapd_eid_he_operation(hapd, tailpos); /* BSS Color Change Announcement element */ cca_pos = hostapd_eid_cca(hapd, tailpos); if (cca_pos != tailpos) hapd->cca_c_off_beacon = cca_pos - tail - 2; tailpos = cca_pos; tailpos = hostapd_eid_spatial_reuse(hapd, tailpos); tailpos = hostapd_eid_he_mu_edca_parameter_set(hapd, tailpos); tailpos = hostapd_eid_he_6ghz_band_cap(hapd, tailpos); } #endif /* CONFIG_IEEE80211AX */ #ifdef CONFIG_IEEE80211BE if (hapd->iconf->ieee80211be && !hapd->conf->disable_11be) { if (hapd->conf->mld_ap) tailpos = hostapd_eid_eht_ml_beacon(hapd, NULL, tailpos, false); tailpos = hostapd_eid_eht_capab(hapd, tailpos, IEEE80211_MODE_AP); tailpos = hostapd_eid_eht_operation(hapd, tailpos); } #endif /* CONFIG_IEEE80211BE */ #ifdef CONFIG_IEEE80211AC if (hapd->conf->vendor_vht) tailpos = hostapd_eid_vendor_vht(hapd, tailpos); #endif /* CONFIG_IEEE80211AC */ /* WPA / OSEN */ tailpos = hostapd_get_wpa_ie(hapd, tailpos, tailend - tailpos); tailpos = hostapd_get_osen_ie(hapd, tailpos, tailend - tailpos); /* Wi-Fi Alliance WMM */ tailpos = hostapd_eid_wmm(hapd, tailpos); #ifdef CONFIG_WPS if (hapd->conf->wps_state && hapd->wps_beacon_ie) { os_memcpy(tailpos, wpabuf_head(hapd->wps_beacon_ie), wpabuf_len(hapd->wps_beacon_ie)); tailpos += wpabuf_len(hapd->wps_beacon_ie); } #endif /* CONFIG_WPS */ #ifdef CONFIG_P2P if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_beacon_ie) { os_memcpy(tailpos, wpabuf_head(hapd->p2p_beacon_ie), wpabuf_len(hapd->p2p_beacon_ie)); tailpos += wpabuf_len(hapd->p2p_beacon_ie); } #endif /* CONFIG_P2P */ #ifdef CONFIG_P2P_MANAGER if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) == P2P_MANAGE) tailpos = hostapd_eid_p2p_manage(hapd, tailpos); #endif /* CONFIG_P2P_MANAGER */ #ifdef CONFIG_HS20 tailpos = hostapd_eid_hs20_indication(hapd, tailpos); #endif /* CONFIG_HS20 */ tailpos = hostapd_eid_mbo(hapd, tailpos, tail + tail_len - tailpos); tailpos = hostapd_eid_owe_trans(hapd, tailpos, tail + tail_len - tailpos); tailpos = hostapd_eid_dpp_cc(hapd, tailpos, tail + tail_len - tailpos); if (hapd->conf->vendor_elements) { os_memcpy(tailpos, wpabuf_head(hapd->conf->vendor_elements), wpabuf_len(hapd->conf->vendor_elements)); tailpos += wpabuf_len(hapd->conf->vendor_elements); } tail_len = tailpos > tail ? tailpos - tail : 0; resp = hostapd_probe_resp_offloads(hapd, &resp_len); #endif /* NEED_AP_MLME */ /* If key management offload is enabled, configure PSK to the driver. */ if (wpa_key_mgmt_wpa_psk_no_sae(hapd->conf->wpa_key_mgmt) && (hapd->iface->drv_flags2 & WPA_DRIVER_FLAGS2_4WAY_HANDSHAKE_AP_PSK)) { if (hapd->conf->ssid.wpa_psk && hapd->conf->ssid.wpa_psk_set) { os_memcpy(params->psk, hapd->conf->ssid.wpa_psk->psk, PMK_LEN); params->psk_len = PMK_LEN; } else if (hapd->conf->ssid.wpa_passphrase && pbkdf2_sha1(hapd->conf->ssid.wpa_passphrase, hapd->conf->ssid.ssid, hapd->conf->ssid.ssid_len, 4096, params->psk, PMK_LEN) == 0) { params->psk_len = PMK_LEN; } } #ifdef CONFIG_SAE /* If SAE offload is enabled, provide password to lower layer for * SAE authentication and PMK generation. */ if (wpa_key_mgmt_sae(hapd->conf->wpa_key_mgmt) && (hapd->iface->drv_flags2 & WPA_DRIVER_FLAGS2_SAE_OFFLOAD_AP)) { if (hostapd_sae_pk_in_use(hapd->conf)) { wpa_printf(MSG_ERROR, "SAE PK not supported with SAE offload"); return -1; } if (hostapd_sae_pw_id_in_use(hapd->conf)) { wpa_printf(MSG_ERROR, "SAE Password Identifiers not supported with SAE offload"); return -1; } params->sae_password = sae_get_password(hapd, NULL, NULL, NULL, NULL, NULL); if (!params->sae_password) { wpa_printf(MSG_ERROR, "SAE password not configured for offload"); return -1; } } #endif /* CONFIG_SAE */ params->head = (u8 *) head; params->head_len = head_len; params->tail = tail; params->tail_len = tail_len; params->proberesp = resp; params->proberesp_len = resp_len; params->dtim_period = hapd->conf->dtim_period; params->beacon_int = hapd->iconf->beacon_int; params->basic_rates = hapd->iface->basic_rates; params->beacon_rate = hapd->iconf->beacon_rate; params->rate_type = hapd->iconf->rate_type; params->ssid = hapd->conf->ssid.ssid; params->ssid_len = hapd->conf->ssid.ssid_len; if ((hapd->conf->wpa & (WPA_PROTO_WPA | WPA_PROTO_RSN)) == (WPA_PROTO_WPA | WPA_PROTO_RSN)) params->pairwise_ciphers = hapd->conf->wpa_pairwise | hapd->conf->rsn_pairwise; else if (hapd->conf->wpa & WPA_PROTO_RSN) params->pairwise_ciphers = hapd->conf->rsn_pairwise; else if (hapd->conf->wpa & WPA_PROTO_WPA) params->pairwise_ciphers = hapd->conf->wpa_pairwise; params->group_cipher = hapd->conf->wpa_group; params->key_mgmt_suites = hapd->conf->wpa_key_mgmt; params->auth_algs = hapd->conf->auth_algs; params->wpa_version = hapd->conf->wpa; params->privacy = hapd->conf->wpa; #ifdef CONFIG_WEP params->privacy |= hapd->conf->ssid.wep.keys_set || (hapd->conf->ieee802_1x && (hapd->conf->default_wep_key_len || hapd->conf->individual_wep_key_len)); #endif /* CONFIG_WEP */ switch (hapd->conf->ignore_broadcast_ssid) { case 0: params->hide_ssid = NO_SSID_HIDING; break; case 1: params->hide_ssid = HIDDEN_SSID_ZERO_LEN; break; case 2: params->hide_ssid = HIDDEN_SSID_ZERO_CONTENTS; break; } params->isolate = hapd->conf->isolate; #ifdef NEED_AP_MLME params->cts_protect = !!(ieee802_11_erp_info(hapd) & ERP_INFO_USE_PROTECTION); params->preamble = hapd->iface->num_sta_no_short_preamble == 0 && hapd->iconf->preamble == SHORT_PREAMBLE; if (hapd->iface->current_mode && hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G) params->short_slot_time = hapd->iface->num_sta_no_short_slot_time > 0 ? 0 : 1; else params->short_slot_time = -1; if (!hapd->iconf->ieee80211n || hapd->conf->disable_11n) params->ht_opmode = -1; else params->ht_opmode = hapd->iface->ht_op_mode; #endif /* NEED_AP_MLME */ params->interworking = hapd->conf->interworking; if (hapd->conf->interworking && !is_zero_ether_addr(hapd->conf->hessid)) params->hessid = hapd->conf->hessid; params->access_network_type = hapd->conf->access_network_type; params->ap_max_inactivity = hapd->conf->ap_max_inactivity; #ifdef CONFIG_P2P params->p2p_go_ctwindow = hapd->iconf->p2p_go_ctwindow; #endif /* CONFIG_P2P */ #ifdef CONFIG_HS20 params->disable_dgaf = hapd->conf->disable_dgaf; if (hapd->conf->osen) { params->privacy = 1; params->osen = 1; } #endif /* CONFIG_HS20 */ params->multicast_to_unicast = hapd->conf->multicast_to_unicast; params->pbss = hapd->conf->pbss; if (hapd->conf->ftm_responder) { if (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_FTM_RESPONDER) { params->ftm_responder = 1; params->lci = hapd->iface->conf->lci; params->civic = hapd->iface->conf->civic; } else { wpa_printf(MSG_WARNING, "Not configuring FTM responder as the driver doesn't advertise support for it"); } } #ifdef CONFIG_IEEE80211BE if (hapd->conf->mld_ap && hapd->iconf->ieee80211be && !hapd->conf->disable_11be) { params->mld_ap = true; params->mld_link_id = hapd->mld_link_id; } #endif /* CONFIG_IEEE80211BE */ return 0; } void ieee802_11_free_ap_params(struct wpa_driver_ap_params *params) { os_free(params->tail); params->tail = NULL; os_free(params->head); params->head = NULL; os_free(params->proberesp); params->proberesp = NULL; os_free(params->mbssid_elem); params->mbssid_elem = NULL; os_free(params->mbssid_elem_offset); params->mbssid_elem_offset = NULL; os_free(params->rnr_elem); params->rnr_elem = NULL; os_free(params->rnr_elem_offset); params->rnr_elem_offset = NULL; #ifdef CONFIG_FILS os_free(params->fd_frame_tmpl); params->fd_frame_tmpl = NULL; #endif /* CONFIG_FILS */ #ifdef CONFIG_IEEE80211AX os_free(params->ubpr.unsol_bcast_probe_resp_tmpl); params->ubpr.unsol_bcast_probe_resp_tmpl = NULL; #endif /* CONFIG_IEEE80211AX */ os_free(params->allowed_freqs); params->allowed_freqs = NULL; } static int __ieee802_11_set_beacon(struct hostapd_data *hapd) { struct wpa_driver_ap_params params; struct hostapd_freq_params freq; struct hostapd_iface *iface = hapd->iface; struct hostapd_config *iconf = iface->conf; struct hostapd_hw_modes *cmode = iface->current_mode; struct wpabuf *beacon, *proberesp, *assocresp; bool twt_he_responder = false; int res, ret = -1, i; struct hostapd_hw_modes *mode; if (!hapd->drv_priv) { wpa_printf(MSG_ERROR, "Interface is disabled"); return -1; } if (hapd->csa_in_progress) { wpa_printf(MSG_ERROR, "Cannot set beacons during CSA period"); return -1; } hapd->beacon_set_done = 1; if (ieee802_11_build_ap_params(hapd, ¶ms) < 0) return -1; if (hostapd_build_ap_extra_ies(hapd, &beacon, &proberesp, &assocresp) < 0) goto fail; params.beacon_ies = beacon; params.proberesp_ies = proberesp; params.assocresp_ies = assocresp; params.reenable = hapd->reenable_beacon; #ifdef CONFIG_IEEE80211AX params.he_spr_ctrl = hapd->iface->conf->spr.sr_control; params.he_spr_non_srg_obss_pd_max_offset = hapd->iface->conf->spr.non_srg_obss_pd_max_offset; params.he_spr_srg_obss_pd_min_offset = hapd->iface->conf->spr.srg_obss_pd_min_offset; params.he_spr_srg_obss_pd_max_offset = hapd->iface->conf->spr.srg_obss_pd_max_offset; os_memcpy(params.he_spr_bss_color_bitmap, hapd->iface->conf->spr.srg_bss_color_bitmap, 8); os_memcpy(params.he_spr_partial_bssid_bitmap, hapd->iface->conf->spr.srg_partial_bssid_bitmap, 8); params.he_bss_color_disabled = hapd->iface->conf->he_op.he_bss_color_disabled; params.he_bss_color_partial = hapd->iface->conf->he_op.he_bss_color_partial; params.he_bss_color = hapd->iface->conf->he_op.he_bss_color; twt_he_responder = hostapd_get_he_twt_responder(hapd, IEEE80211_MODE_AP); params.ubpr.unsol_bcast_probe_resp_tmpl = hostapd_unsol_bcast_probe_resp(hapd, ¶ms.ubpr); #endif /* CONFIG_IEEE80211AX */ params.twt_responder = twt_he_responder || hostapd_get_ht_vht_twt_responder(hapd); hapd->reenable_beacon = 0; #ifdef CONFIG_SAE params.sae_pwe = hapd->conf->sae_pwe; #endif /* CONFIG_SAE */ #ifdef CONFIG_FILS params.fd_frame_tmpl = hostapd_fils_discovery(hapd, ¶ms); #endif /* CONFIG_FILS */ #ifdef CONFIG_IEEE80211BE params.punct_bitmap = iconf->punct_bitmap; #endif /* CONFIG_IEEE80211BE */ if (cmode && hostapd_set_freq_params(&freq, iconf->hw_mode, iface->freq, iconf->channel, iconf->enable_edmg, iconf->edmg_channel, iconf->ieee80211n, iconf->ieee80211ac, iconf->ieee80211ax, iconf->ieee80211be, iconf->secondary_channel, hostapd_get_oper_chwidth(iconf), hostapd_get_oper_centr_freq_seg0_idx(iconf), hostapd_get_oper_centr_freq_seg1_idx(iconf), cmode->vht_capab, &cmode->he_capab[IEEE80211_MODE_AP], &cmode->eht_capab[IEEE80211_MODE_AP], hostapd_get_punct_bitmap(hapd)) == 0) { freq.link_id = -1; #ifdef CONFIG_IEEE80211BE if (hapd->conf->mld_ap) freq.link_id = hapd->mld_link_id; #endif /* CONFIG_IEEE80211BE */ params.freq = &freq; } for (i = 0; i < hapd->iface->num_hw_features; i++) { mode = &hapd->iface->hw_features[i]; if (iconf->hw_mode != HOSTAPD_MODE_IEEE80211ANY && iconf->hw_mode != mode->mode) continue; hostapd_get_hw_mode_any_channels(hapd, mode, !(iconf->acs_freq_list.num || iconf->acs_ch_list.num), true, ¶ms.allowed_freqs); } res = hostapd_drv_set_ap(hapd, ¶ms); hostapd_free_ap_extra_ies(hapd, beacon, proberesp, assocresp); if (res) wpa_printf(MSG_ERROR, "Failed to set beacon parameters"); else ret = 0; fail: ieee802_11_free_ap_params(¶ms); return ret; } void ieee802_11_set_beacon_per_bss_only(struct hostapd_data *hapd) { __ieee802_11_set_beacon(hapd); } int ieee802_11_set_beacon(struct hostapd_data *hapd) { struct hostapd_iface *iface = hapd->iface; int ret; size_t i, j; bool is_6g, hapd_mld = false; ret = __ieee802_11_set_beacon(hapd); if (ret != 0) return ret; if (!iface->interfaces || iface->interfaces->count <= 1) return 0; #ifdef CONFIG_IEEE80211BE hapd_mld = hapd->conf->mld_ap; #endif /* CONFIG_IEEE80211BE */ /* Update Beacon frames in case of 6 GHz colocation or AP MLD */ is_6g = is_6ghz_op_class(iface->conf->op_class); for (j = 0; j < iface->interfaces->count; j++) { struct hostapd_iface *other; bool other_iface_6g; other = iface->interfaces->iface[j]; if (other == iface || !other || !other->conf) continue; other_iface_6g = is_6ghz_op_class(other->conf->op_class); if (is_6g == other_iface_6g && !hapd_mld) continue; for (i = 0; i < other->num_bss; i++) { #ifdef CONFIG_IEEE80211BE if (is_6g == other_iface_6g && !(hapd_mld && other->bss[i]->conf->mld_ap && hostapd_is_ml_partner(hapd, other->bss[i]))) continue; #endif /* CONFIG_IEEE80211BE */ if (other->bss[i] && other->bss[i]->started) __ieee802_11_set_beacon(other->bss[i]); } } return 0; } int ieee802_11_set_beacons(struct hostapd_iface *iface) { size_t i; int ret = 0; for (i = 0; i < iface->num_bss; i++) { if (iface->bss[i]->started && ieee802_11_set_beacon(iface->bss[i]) < 0) ret = -1; } return ret; } /* only update beacons if started */ int ieee802_11_update_beacons(struct hostapd_iface *iface) { size_t i; int ret = 0; for (i = 0; i < iface->num_bss; i++) { if (iface->bss[i]->beacon_set_done && iface->bss[i]->started && ieee802_11_set_beacon(iface->bss[i]) < 0) ret = -1; } return ret; } #endif /* CONFIG_NATIVE_WINDOWS */