![Jouni Malinen](/assets/img/avatar_default.png)
prev cannot be NULL here in the hostapd_eid_country_add() call since prev is set whenever start becomes non-NULL. That seems to be a bit too difficult for some static analyzers, so check the prev pointer explicitly to avoid false warnings. Signed-off-by: Jouni Malinen <j@w1.fi>
1031 lines
28 KiB
C
1031 lines
28 KiB
C
/*
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* hostapd / IEEE 802.11 Management: Beacon and Probe Request/Response
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* Copyright (c) 2002-2004, Instant802 Networks, Inc.
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* Copyright (c) 2005-2006, Devicescape Software, Inc.
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* Copyright (c) 2008-2012, Jouni Malinen <j@w1.fi>
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*
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* This software may be distributed under the terms of the BSD license.
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* See README for more details.
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*/
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#include "utils/includes.h"
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#ifndef CONFIG_NATIVE_WINDOWS
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#include "utils/common.h"
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#include "common/ieee802_11_defs.h"
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#include "common/ieee802_11_common.h"
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#include "wps/wps_defs.h"
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#include "p2p/p2p.h"
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#include "hostapd.h"
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#include "ieee802_11.h"
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#include "wpa_auth.h"
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#include "wmm.h"
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#include "ap_config.h"
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#include "sta_info.h"
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#include "p2p_hostapd.h"
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#include "ap_drv_ops.h"
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#include "beacon.h"
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#include "hs20.h"
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#include "dfs.h"
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#ifdef NEED_AP_MLME
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static u8 * hostapd_eid_bss_load(struct hostapd_data *hapd, u8 *eid, size_t len)
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{
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#ifdef CONFIG_TESTING_OPTIONS
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if (hapd->conf->bss_load_test_set) {
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if (2 + 5 > len)
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return eid;
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*eid++ = WLAN_EID_BSS_LOAD;
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*eid++ = 5;
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os_memcpy(eid, hapd->conf->bss_load_test, 5);
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eid += 5;
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}
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#endif /* CONFIG_TESTING_OPTIONS */
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return eid;
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}
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static u8 ieee802_11_erp_info(struct hostapd_data *hapd)
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{
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u8 erp = 0;
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if (hapd->iface->current_mode == NULL ||
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hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
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return 0;
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if (hapd->iface->olbc)
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erp |= ERP_INFO_USE_PROTECTION;
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if (hapd->iface->num_sta_non_erp > 0) {
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erp |= ERP_INFO_NON_ERP_PRESENT |
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ERP_INFO_USE_PROTECTION;
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}
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if (hapd->iface->num_sta_no_short_preamble > 0 ||
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hapd->iconf->preamble == LONG_PREAMBLE)
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erp |= ERP_INFO_BARKER_PREAMBLE_MODE;
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return erp;
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}
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static u8 * hostapd_eid_ds_params(struct hostapd_data *hapd, u8 *eid)
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{
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*eid++ = WLAN_EID_DS_PARAMS;
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*eid++ = 1;
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*eid++ = hapd->iconf->channel;
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return eid;
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}
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static u8 * hostapd_eid_erp_info(struct hostapd_data *hapd, u8 *eid)
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{
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if (hapd->iface->current_mode == NULL ||
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hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
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return eid;
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/* Set NonERP_present and use_protection bits if there
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* are any associated NonERP stations. */
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/* TODO: use_protection bit can be set to zero even if
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* there are NonERP stations present. This optimization
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* might be useful if NonERP stations are "quiet".
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* See 802.11g/D6 E-1 for recommended practice.
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* In addition, Non ERP present might be set, if AP detects Non ERP
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* operation on other APs. */
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/* Add ERP Information element */
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*eid++ = WLAN_EID_ERP_INFO;
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*eid++ = 1;
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*eid++ = ieee802_11_erp_info(hapd);
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return eid;
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}
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static u8 * hostapd_eid_pwr_constraint(struct hostapd_data *hapd, u8 *eid)
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{
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u8 *pos = eid;
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u8 local_pwr_constraint = 0;
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int dfs;
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if (hapd->iface->current_mode == NULL ||
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hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211A)
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return eid;
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/*
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* There is no DFS support and power constraint was not directly
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* requested by config option.
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*/
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if (!hapd->iconf->ieee80211h &&
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hapd->iconf->local_pwr_constraint == -1)
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return eid;
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/* Check if DFS is required by regulatory. */
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dfs = hostapd_is_dfs_required(hapd->iface);
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if (dfs < 0) {
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wpa_printf(MSG_WARNING, "Failed to check if DFS is required; ret=%d",
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dfs);
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dfs = 0;
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}
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if (dfs == 0 && hapd->iconf->local_pwr_constraint == -1)
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return eid;
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/*
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* ieee80211h (DFS) is enabled so Power Constraint element shall
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* be added when running on DFS channel whenever local_pwr_constraint
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* is configured or not. In order to meet regulations when TPC is not
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* implemented using a transmit power that is below the legal maximum
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* (including any mitigation factor) should help. In this case,
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* indicate 3 dB below maximum allowed transmit power.
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*/
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if (hapd->iconf->local_pwr_constraint == -1)
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local_pwr_constraint = 3;
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/*
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* A STA that is not an AP shall use a transmit power less than or
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* equal to the local maximum transmit power level for the channel.
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* The local maximum transmit power can be calculated from the formula:
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* local max TX pwr = max TX pwr - local pwr constraint
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* Where max TX pwr is maximum transmit power level specified for
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* channel in Country element and local pwr constraint is specified
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* for channel in this Power Constraint element.
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*/
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/* Element ID */
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*pos++ = WLAN_EID_PWR_CONSTRAINT;
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/* Length */
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*pos++ = 1;
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/* Local Power Constraint */
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if (local_pwr_constraint)
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*pos++ = local_pwr_constraint;
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else
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*pos++ = hapd->iconf->local_pwr_constraint;
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return pos;
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}
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static u8 * hostapd_eid_country_add(u8 *pos, u8 *end, int chan_spacing,
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struct hostapd_channel_data *start,
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struct hostapd_channel_data *prev)
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{
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if (end - pos < 3)
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return pos;
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/* first channel number */
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*pos++ = start->chan;
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/* number of channels */
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*pos++ = (prev->chan - start->chan) / chan_spacing + 1;
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/* maximum transmit power level */
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*pos++ = start->max_tx_power;
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return pos;
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}
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static u8 * hostapd_eid_country(struct hostapd_data *hapd, u8 *eid,
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int max_len)
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{
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u8 *pos = eid;
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u8 *end = eid + max_len;
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int i;
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struct hostapd_hw_modes *mode;
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struct hostapd_channel_data *start, *prev;
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int chan_spacing = 1;
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if (!hapd->iconf->ieee80211d || max_len < 6 ||
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hapd->iface->current_mode == NULL)
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return eid;
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*pos++ = WLAN_EID_COUNTRY;
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pos++; /* length will be set later */
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os_memcpy(pos, hapd->iconf->country, 3); /* e.g., 'US ' */
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pos += 3;
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mode = hapd->iface->current_mode;
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if (mode->mode == HOSTAPD_MODE_IEEE80211A)
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chan_spacing = 4;
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start = prev = NULL;
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for (i = 0; i < mode->num_channels; i++) {
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struct hostapd_channel_data *chan = &mode->channels[i];
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if (chan->flag & HOSTAPD_CHAN_DISABLED)
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continue;
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if (start && prev &&
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prev->chan + chan_spacing == chan->chan &&
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start->max_tx_power == chan->max_tx_power) {
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prev = chan;
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continue; /* can use same entry */
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}
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if (start && prev) {
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pos = hostapd_eid_country_add(pos, end, chan_spacing,
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start, prev);
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start = NULL;
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}
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/* Start new group */
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start = prev = chan;
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}
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if (start) {
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pos = hostapd_eid_country_add(pos, end, chan_spacing,
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start, prev);
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}
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if ((pos - eid) & 1) {
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if (end - pos < 1)
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return eid;
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*pos++ = 0; /* pad for 16-bit alignment */
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}
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eid[1] = (pos - eid) - 2;
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return pos;
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}
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static u8 * hostapd_eid_wpa(struct hostapd_data *hapd, u8 *eid, size_t len)
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{
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const u8 *ie;
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size_t ielen;
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ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &ielen);
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if (ie == NULL || ielen > len)
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return eid;
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os_memcpy(eid, ie, ielen);
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return eid + ielen;
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}
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static u8 * hostapd_eid_csa(struct hostapd_data *hapd, u8 *eid)
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{
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u8 chan;
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if (!hapd->iface->cs_freq_params.freq)
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return eid;
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if (ieee80211_freq_to_chan(hapd->iface->cs_freq_params.freq, &chan) ==
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NUM_HOSTAPD_MODES)
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return eid;
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*eid++ = WLAN_EID_CHANNEL_SWITCH;
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*eid++ = 3;
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*eid++ = hapd->iface->cs_block_tx;
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*eid++ = chan;
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*eid++ = hapd->iface->cs_count;
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return eid;
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}
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static u8 * hostapd_eid_secondary_channel(struct hostapd_data *hapd, u8 *eid)
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{
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u8 sec_ch;
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if (!hapd->iface->cs_freq_params.sec_channel_offset)
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return eid;
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if (hapd->iface->cs_freq_params.sec_channel_offset == -1)
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sec_ch = HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW;
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else if (hapd->iface->cs_freq_params.sec_channel_offset == 1)
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sec_ch = HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE;
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else
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return eid;
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*eid++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;
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*eid++ = 1;
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*eid++ = sec_ch;
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return eid;
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}
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static u8 * hostapd_add_csa_elems(struct hostapd_data *hapd, u8 *pos,
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u8 *start, unsigned int *csa_counter_off)
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{
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u8 *old_pos = pos;
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if (!csa_counter_off)
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return pos;
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*csa_counter_off = 0;
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pos = hostapd_eid_csa(hapd, pos);
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if (pos != old_pos) {
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/* save an offset to the counter - should be last byte */
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*csa_counter_off = pos - start - 1;
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pos = hostapd_eid_secondary_channel(hapd, pos);
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}
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return pos;
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}
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static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
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struct sta_info *sta,
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const struct ieee80211_mgmt *req,
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int is_p2p, size_t *resp_len)
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{
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struct ieee80211_mgmt *resp;
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u8 *pos, *epos;
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size_t buflen;
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#define MAX_PROBERESP_LEN 768
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buflen = MAX_PROBERESP_LEN;
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#ifdef CONFIG_WPS
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if (hapd->wps_probe_resp_ie)
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buflen += wpabuf_len(hapd->wps_probe_resp_ie);
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#endif /* CONFIG_WPS */
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#ifdef CONFIG_P2P
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if (hapd->p2p_probe_resp_ie)
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buflen += wpabuf_len(hapd->p2p_probe_resp_ie);
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#endif /* CONFIG_P2P */
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if (hapd->conf->vendor_elements)
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buflen += wpabuf_len(hapd->conf->vendor_elements);
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resp = os_zalloc(buflen);
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if (resp == NULL)
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return NULL;
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epos = ((u8 *) resp) + MAX_PROBERESP_LEN;
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resp->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
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WLAN_FC_STYPE_PROBE_RESP);
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if (req)
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os_memcpy(resp->da, req->sa, ETH_ALEN);
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os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN);
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os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN);
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resp->u.probe_resp.beacon_int =
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host_to_le16(hapd->iconf->beacon_int);
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/* hardware or low-level driver will setup seq_ctrl and timestamp */
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resp->u.probe_resp.capab_info =
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host_to_le16(hostapd_own_capab_info(hapd, sta, 1));
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pos = resp->u.probe_resp.variable;
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*pos++ = WLAN_EID_SSID;
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*pos++ = hapd->conf->ssid.ssid_len;
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os_memcpy(pos, hapd->conf->ssid.ssid, hapd->conf->ssid.ssid_len);
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pos += hapd->conf->ssid.ssid_len;
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/* Supported rates */
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pos = hostapd_eid_supp_rates(hapd, pos);
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/* DS Params */
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pos = hostapd_eid_ds_params(hapd, pos);
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pos = hostapd_eid_country(hapd, pos, epos - pos);
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/* Power Constraint element */
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pos = hostapd_eid_pwr_constraint(hapd, pos);
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/* ERP Information element */
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pos = hostapd_eid_erp_info(hapd, pos);
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/* Extended supported rates */
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pos = hostapd_eid_ext_supp_rates(hapd, pos);
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/* RSN, MDIE, WPA */
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pos = hostapd_eid_wpa(hapd, pos, epos - pos);
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pos = hostapd_eid_bss_load(hapd, pos, epos - pos);
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#ifdef CONFIG_IEEE80211N
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pos = hostapd_eid_ht_capabilities(hapd, pos);
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pos = hostapd_eid_ht_operation(hapd, pos);
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#endif /* CONFIG_IEEE80211N */
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pos = hostapd_eid_ext_capab(hapd, pos);
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pos = hostapd_eid_time_adv(hapd, pos);
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pos = hostapd_eid_time_zone(hapd, pos);
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pos = hostapd_eid_interworking(hapd, pos);
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pos = hostapd_eid_adv_proto(hapd, pos);
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pos = hostapd_eid_roaming_consortium(hapd, pos);
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pos = hostapd_add_csa_elems(hapd, pos, (u8 *)resp,
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&hapd->iface->cs_c_off_proberesp);
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#ifdef CONFIG_IEEE80211AC
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pos = hostapd_eid_vht_capabilities(hapd, pos);
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pos = hostapd_eid_vht_operation(hapd, pos);
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#endif /* CONFIG_IEEE80211AC */
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/* Wi-Fi Alliance WMM */
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pos = hostapd_eid_wmm(hapd, pos);
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#ifdef CONFIG_WPS
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if (hapd->conf->wps_state && hapd->wps_probe_resp_ie) {
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os_memcpy(pos, wpabuf_head(hapd->wps_probe_resp_ie),
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wpabuf_len(hapd->wps_probe_resp_ie));
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pos += wpabuf_len(hapd->wps_probe_resp_ie);
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}
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#endif /* CONFIG_WPS */
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#ifdef CONFIG_P2P
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if ((hapd->conf->p2p & P2P_ENABLED) && is_p2p &&
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hapd->p2p_probe_resp_ie) {
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os_memcpy(pos, wpabuf_head(hapd->p2p_probe_resp_ie),
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wpabuf_len(hapd->p2p_probe_resp_ie));
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pos += wpabuf_len(hapd->p2p_probe_resp_ie);
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}
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#endif /* CONFIG_P2P */
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#ifdef CONFIG_P2P_MANAGER
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if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
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P2P_MANAGE)
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pos = hostapd_eid_p2p_manage(hapd, pos);
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#endif /* CONFIG_P2P_MANAGER */
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#ifdef CONFIG_HS20
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pos = hostapd_eid_hs20_indication(hapd, pos);
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pos = hostapd_eid_osen(hapd, pos);
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#endif /* CONFIG_HS20 */
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if (hapd->conf->vendor_elements) {
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os_memcpy(pos, wpabuf_head(hapd->conf->vendor_elements),
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wpabuf_len(hapd->conf->vendor_elements));
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pos += wpabuf_len(hapd->conf->vendor_elements);
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}
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*resp_len = pos - (u8 *) resp;
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return (u8 *) resp;
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}
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enum ssid_match_result {
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NO_SSID_MATCH,
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EXACT_SSID_MATCH,
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WILDCARD_SSID_MATCH
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};
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static enum ssid_match_result ssid_match(struct hostapd_data *hapd,
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const u8 *ssid, size_t ssid_len,
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const u8 *ssid_list,
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size_t ssid_list_len)
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{
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const u8 *pos, *end;
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int wildcard = 0;
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if (ssid_len == 0)
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wildcard = 1;
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if (ssid_len == hapd->conf->ssid.ssid_len &&
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os_memcmp(ssid, hapd->conf->ssid.ssid, ssid_len) == 0)
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return EXACT_SSID_MATCH;
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|
|
if (ssid_list == NULL)
|
|
return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
|
|
|
|
pos = ssid_list;
|
|
end = ssid_list + ssid_list_len;
|
|
while (pos + 1 <= end) {
|
|
if (pos + 2 + pos[1] > end)
|
|
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];
|
|
}
|
|
|
|
return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
|
|
}
|
|
|
|
|
|
void handle_probe_req(struct hostapd_data *hapd,
|
|
const struct ieee80211_mgmt *mgmt, size_t len,
|
|
int ssi_signal)
|
|
{
|
|
u8 *resp;
|
|
struct ieee802_11_elems elems;
|
|
const u8 *ie;
|
|
size_t ie_len;
|
|
struct sta_info *sta = NULL;
|
|
size_t i, resp_len;
|
|
int noack;
|
|
enum ssid_match_result res;
|
|
|
|
ie = mgmt->u.probe_req.variable;
|
|
if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req))
|
|
return;
|
|
ie_len = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req));
|
|
|
|
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->iconf->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;
|
|
}
|
|
|
|
#ifdef CONFIG_P2P
|
|
if (hapd->p2p && 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 && 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) {
|
|
wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR " for "
|
|
"broadcast SSID ignored", MAC2STR(mgmt->sa));
|
|
return;
|
|
}
|
|
|
|
sta = ap_get_sta(hapd, mgmt->sa);
|
|
|
|
#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 */
|
|
|
|
res = ssid_match(hapd, elems.ssid, elems.ssid_len,
|
|
elems.ssid_list, elems.ssid_list_len);
|
|
if (res != NO_SSID_MATCH) {
|
|
if (sta)
|
|
sta->ssid_probe = &hapd->conf->ssid;
|
|
} else {
|
|
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;
|
|
}
|
|
|
|
#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) &&
|
|
os_memcmp(hessid, hapd->conf->hessid, ETH_ALEN) != 0) {
|
|
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 */
|
|
|
|
#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 */
|
|
|
|
resp = hostapd_gen_probe_resp(hapd, sta, mgmt, elems.p2p != NULL,
|
|
&resp_len);
|
|
if (resp == NULL)
|
|
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));
|
|
|
|
if (hostapd_drv_send_mlme(hapd, resp, resp_len, noack) < 0)
|
|
wpa_printf(MSG_INFO, "handle_probe_req: send failed");
|
|
|
|
os_free(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)
|
|
{
|
|
/* 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 */
|
|
return hostapd_gen_probe_resp(hapd, NULL, NULL, 0, resp_len);
|
|
}
|
|
|
|
#endif /* NEED_AP_MLME */
|
|
|
|
|
|
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;
|
|
|
|
#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 */
|
|
if (hapd->conf->vendor_elements)
|
|
tail_len += wpabuf_len(hapd->conf->vendor_elements);
|
|
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;
|
|
}
|
|
|
|
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, NULL, 0);
|
|
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,
|
|
tail + BEACON_TAIL_BUF_SIZE - tailpos);
|
|
|
|
/* Power Constraint element */
|
|
tailpos = hostapd_eid_pwr_constraint(hapd, tailpos);
|
|
|
|
/* ERP Information element */
|
|
tailpos = hostapd_eid_erp_info(hapd, tailpos);
|
|
|
|
/* Extended supported rates */
|
|
tailpos = hostapd_eid_ext_supp_rates(hapd, tailpos);
|
|
|
|
/* RSN, MDIE, WPA */
|
|
tailpos = hostapd_eid_wpa(hapd, tailpos, tail + BEACON_TAIL_BUF_SIZE -
|
|
tailpos);
|
|
|
|
tailpos = hostapd_eid_bss_load(hapd, tailpos,
|
|
tail + BEACON_TAIL_BUF_SIZE - tailpos);
|
|
|
|
#ifdef CONFIG_IEEE80211N
|
|
tailpos = hostapd_eid_ht_capabilities(hapd, tailpos);
|
|
tailpos = hostapd_eid_ht_operation(hapd, tailpos);
|
|
#endif /* CONFIG_IEEE80211N */
|
|
|
|
tailpos = hostapd_eid_ext_capab(hapd, tailpos);
|
|
|
|
/*
|
|
* 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);
|
|
tailpos = hostapd_add_csa_elems(hapd, tailpos, tail,
|
|
&hapd->iface->cs_c_off_beacon);
|
|
#ifdef CONFIG_IEEE80211AC
|
|
tailpos = hostapd_eid_vht_capabilities(hapd, tailpos);
|
|
tailpos = hostapd_eid_vht_operation(hapd, tailpos);
|
|
#endif /* CONFIG_IEEE80211AC */
|
|
|
|
/* 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);
|
|
tailpos = hostapd_eid_osen(hapd, tailpos);
|
|
#endif /* CONFIG_HS20 */
|
|
|
|
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 */
|
|
|
|
os_memset(params, 0, sizeof(*params));
|
|
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->ssid = hapd->conf->ssid.ssid;
|
|
params->ssid_len = hapd->conf->ssid.ssid_len;
|
|
params->pairwise_ciphers = hapd->conf->wpa_pairwise |
|
|
hapd->conf->rsn_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->ssid.wep.keys_set || hapd->conf->wpa ||
|
|
(hapd->conf->ieee802_1x &&
|
|
(hapd->conf->default_wep_key_len ||
|
|
hapd->conf->individual_wep_key_len));
|
|
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_HS20
|
|
params->disable_dgaf = hapd->conf->disable_dgaf;
|
|
if (hapd->conf->osen) {
|
|
params->privacy = 1;
|
|
params->osen = 1;
|
|
}
|
|
#endif /* CONFIG_HS20 */
|
|
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;
|
|
}
|
|
|
|
|
|
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 wpabuf *beacon, *proberesp, *assocresp;
|
|
int res, ret = -1;
|
|
|
|
if (hapd->iface->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;
|
|
|
|
if (iface->current_mode &&
|
|
hostapd_set_freq_params(&freq, iconf->hw_mode, iface->freq,
|
|
iconf->channel, iconf->ieee80211n,
|
|
iconf->ieee80211ac,
|
|
iconf->secondary_channel,
|
|
iconf->vht_oper_chwidth,
|
|
iconf->vht_oper_centr_freq_seg0_idx,
|
|
iconf->vht_oper_centr_freq_seg1_idx,
|
|
iface->current_mode->vht_capab) == 0)
|
|
params.freq = &freq;
|
|
|
|
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;
|
|
}
|
|
|
|
|
|
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 */
|