* 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) 2008-2009, Jouni Malinen <j@w1.fi>
+ * Copyright (c) 2008-2012, Jouni Malinen <j@w1.fi>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Alternatively, this software may be distributed under the terms of BSD
- * license.
- *
- * See README and COPYING for more details.
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
*/
#include "utils/includes.h"
#include "utils/common.h"
#include "common/ieee802_11_defs.h"
#include "common/ieee802_11_common.h"
-#include "drivers/driver.h"
+#include "common/hw_features_common.h"
#include "wps/wps_defs.h"
#include "p2p/p2p.h"
#include "hostapd.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"
+
+
+#ifdef NEED_AP_MLME
+
+static u8 * hostapd_eid_rm_enabled_capab(struct hostapd_data *hapd, u8 *eid,
+ size_t len)
+{
+ if (!hapd->conf->radio_measurements || len < 2 + 4)
+ return eid;
+
+ *eid++ = WLAN_EID_RRM_ENABLED_CAPABILITIES;
+ *eid++ = 5;
+ *eid++ = (hapd->conf->radio_measurements & BIT(0)) ?
+ WLAN_RRM_CAPS_NEIGHBOR_REPORT : 0x00;
+ *eid++ = 0x00;
+ *eid++ = 0x00;
+ *eid++ = 0x00;
+ *eid++ = 0x00;
+ return eid;
+}
+
+
+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)
hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
return 0;
- switch (hapd->iconf->cts_protection_type) {
- case CTS_PROTECTION_FORCE_ENABLED:
- erp |= ERP_INFO_NON_ERP_PRESENT | ERP_INFO_USE_PROTECTION;
- break;
- case CTS_PROTECTION_FORCE_DISABLED:
- erp = 0;
- break;
- case CTS_PROTECTION_AUTOMATIC:
- if (hapd->iface->olbc)
- erp |= ERP_INFO_USE_PROTECTION;
- /* continue */
- case CTS_PROTECTION_AUTOMATIC_NO_OLBC:
- if (hapd->iface->num_sta_non_erp > 0) {
- erp |= ERP_INFO_NON_ERP_PRESENT |
- ERP_INFO_USE_PROTECTION;
- }
- break;
+ 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)
}
+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(u8 *pos, u8 *end, int chan_spacing,
struct hostapd_channel_data *start,
struct hostapd_channel_data *prev)
continue; /* can use same entry */
}
- if (start) {
+ if (start && prev) {
pos = hostapd_eid_country_add(pos, end, chan_spacing,
start, prev);
start = NULL;
}
-static u8 * hostapd_eid_wpa(struct hostapd_data *hapd, u8 *eid, size_t len,
- struct sta_info *sta)
+static u8 * hostapd_eid_wpa(struct hostapd_data *hapd, u8 *eid, size_t len)
{
const u8 *ie;
size_t ielen;
}
-void handle_probe_req(struct hostapd_data *hapd,
- const struct ieee80211_mgmt *mgmt, size_t len)
+static u8 * hostapd_eid_csa(struct hostapd_data *hapd, u8 *eid)
{
- struct ieee80211_mgmt *resp;
- struct ieee802_11_elems elems;
- char *ssid;
- u8 *pos, *epos;
- const u8 *ie;
- size_t ssid_len, ie_len;
- struct sta_info *sta = NULL;
- size_t buflen;
- size_t i;
+ u8 chan;
- ie = mgmt->u.probe_req.variable;
- ie_len = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req));
+ if (!hapd->cs_freq_params.freq)
+ return eid;
- 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, ie, ie_len) > 0)
- return;
+ if (ieee80211_freq_to_chan(hapd->cs_freq_params.freq, &chan) ==
+ NUM_HOSTAPD_MODES)
+ return eid;
- if (!hapd->iconf->send_probe_response)
- return;
+ *eid++ = WLAN_EID_CHANNEL_SWITCH;
+ *eid++ = 3;
+ *eid++ = hapd->cs_block_tx;
+ *eid++ = chan;
+ *eid++ = hapd->cs_count;
- 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;
- }
+ return eid;
+}
- ssid = NULL;
- ssid_len = 0;
- 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;
- }
+static u8 * hostapd_eid_secondary_channel(struct hostapd_data *hapd, u8 *eid)
+{
+ u8 sec_ch;
-#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);
- }
-#endif /* CONFIG_P2P */
+ if (!hapd->cs_freq_params.sec_channel_offset)
+ return eid;
- if (hapd->conf->ignore_broadcast_ssid && elems.ssid_len == 0) {
- wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR " for "
- "broadcast SSID ignored", MAC2STR(mgmt->sa));
- return;
- }
+ if (hapd->cs_freq_params.sec_channel_offset == -1)
+ sec_ch = HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW;
+ else if (hapd->cs_freq_params.sec_channel_offset == 1)
+ sec_ch = HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE;
+ else
+ return eid;
- sta = ap_get_sta(hapd, mgmt->sa);
+ *eid++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;
+ *eid++ = 1;
+ *eid++ = sec_ch;
-#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 */
+ return eid;
+}
- if (elems.ssid_len == 0 ||
- (elems.ssid_len == hapd->conf->ssid.ssid_len &&
- os_memcmp(elems.ssid, hapd->conf->ssid.ssid, elems.ssid_len) ==
- 0)) {
- ssid = hapd->conf->ssid.ssid;
- ssid_len = hapd->conf->ssid.ssid_len;
- if (sta)
- sta->ssid_probe = &hapd->conf->ssid;
- }
- if (!ssid) {
- if (!(mgmt->da[0] & 0x01)) {
- char ssid_txt[33];
- ieee802_11_print_ssid(ssid_txt, elems.ssid,
- elems.ssid_len);
- wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
- " for foreign SSID '%s' (DA " MACSTR ")",
- MAC2STR(mgmt->sa), ssid_txt,
- MAC2STR(mgmt->da));
- }
- return;
+static u8 * hostapd_add_csa_elems(struct hostapd_data *hapd, u8 *pos,
+ u8 *start, unsigned int *csa_counter_off)
+{
+ u8 *old_pos = pos;
+
+ if (!csa_counter_off)
+ return pos;
+
+ *csa_counter_off = 0;
+ pos = hostapd_eid_csa(hapd, pos);
+
+ if (pos != old_pos) {
+ /* save an offset to the counter - should be last byte */
+ *csa_counter_off = pos - start - 1;
+ pos = hostapd_eid_secondary_channel(hapd, pos);
}
- /* TODO: verify that supp_rates contains at least one matching rate
- * with AP configuration */
+ return pos;
+}
+
+
+static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
+ const struct ieee80211_mgmt *req,
+ int is_p2p, size_t *resp_len)
+{
+ struct ieee80211_mgmt *resp;
+ u8 *pos, *epos;
+ size_t buflen;
+
#define MAX_PROBERESP_LEN 768
buflen = MAX_PROBERESP_LEN;
#ifdef CONFIG_WPS
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);
+ if (hapd->conf->vendor_vht) {
+ buflen += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) +
+ 2 + sizeof(struct ieee80211_vht_operation);
+ }
resp = os_zalloc(buflen);
if (resp == NULL)
- return;
+ return NULL;
+
epos = ((u8 *) resp) + MAX_PROBERESP_LEN;
resp->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
WLAN_FC_STYPE_PROBE_RESP);
- os_memcpy(resp->da, mgmt->sa, ETH_ALEN);
+ if (req)
+ os_memcpy(resp->da, req->sa, ETH_ALEN);
os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN);
os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN);
/* hardware or low-level driver will setup seq_ctrl and timestamp */
resp->u.probe_resp.capab_info =
- host_to_le16(hostapd_own_capab_info(hapd, sta, 1));
+ host_to_le16(hostapd_own_capab_info(hapd));
pos = resp->u.probe_resp.variable;
*pos++ = WLAN_EID_SSID;
- *pos++ = ssid_len;
- os_memcpy(pos, ssid, ssid_len);
- pos += ssid_len;
+ *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);
pos = hostapd_eid_country(hapd, pos, epos - pos);
+ /* Power Constraint element */
+ pos = hostapd_eid_pwr_constraint(hapd, pos);
+
/* ERP Information element */
pos = hostapd_eid_erp_info(hapd, pos);
pos = hostapd_eid_ext_supp_rates(hapd, pos);
/* RSN, MDIE, WPA */
- pos = hostapd_eid_wpa(hapd, pos, epos - pos, sta);
+ pos = hostapd_eid_wpa(hapd, pos, epos - pos);
+
+ pos = hostapd_eid_bss_load(hapd, pos, epos - pos);
+
+ pos = hostapd_eid_rm_enabled_capab(hapd, pos, epos - pos);
#ifdef CONFIG_IEEE80211N
pos = hostapd_eid_ht_capabilities(hapd, pos);
pos = hostapd_eid_ht_operation(hapd, pos);
#endif /* CONFIG_IEEE80211N */
+ pos = hostapd_eid_ext_capab(hapd, pos);
+
+ 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);
+
+ pos = hostapd_add_csa_elems(hapd, pos, (u8 *)resp,
+ &hapd->cs_c_off_proberesp);
+
+#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) {
+ pos = hostapd_eid_vht_capabilities(hapd, pos);
+ pos = hostapd_eid_vht_operation(hapd, pos);
+ }
+ if (hapd->conf->vendor_vht)
+ pos = hostapd_eid_vendor_vht(hapd, pos);
+#endif /* CONFIG_IEEE80211AC */
+
/* Wi-Fi Alliance WMM */
pos = hostapd_eid_wmm(hapd, pos);
#endif /* CONFIG_WPS */
#ifdef CONFIG_P2P
- if ((hapd->conf->p2p & P2P_ENABLED) && elems.p2p &&
+ if ((hapd->conf->p2p & P2P_ENABLED) && 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 = hostapd_eid_p2p_manage(hapd, pos);
#endif /* CONFIG_P2P_MANAGER */
- if (hapd->drv.send_mgmt_frame(hapd, resp, pos - (u8 *) resp) < 0)
- perror("handle_probe_req: send");
+#ifdef CONFIG_HS20
+ pos = hostapd_eid_hs20_indication(hapd, pos);
+ pos = hostapd_eid_osen(hapd, pos);
+#endif /* CONFIG_HS20 */
+
+ 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);
+ }
+
+ *resp_len = pos - (u8 *) resp;
+ return (u8 *) resp;
+}
+
+
+enum ssid_match_result {
+ NO_SSID_MATCH,
+ EXACT_SSID_MATCH,
+ WILDCARD_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 *pos, *end;
+ int wildcard = 0;
+
+ 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 == 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 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--;
+ os_free(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 (os_memcmp(addr, info->addr, ETH_ALEN) == 0)
+ return info;
+
+ return NULL;
+}
+
+
+void sta_track_add(struct hostapd_iface *iface, const u8 *addr)
+{
+ 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);
+ return;
+ }
+
+ /* Add a new entry */
+ info = os_zalloc(sizeof(*info));
+ os_memcpy(info->addr, addr, ETH_ALEN);
+ os_get_reltime(&info->last_seen);
+
+ 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;
+}
+
+
+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;
+ 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;
+ if (hapd->iconf->track_sta_max_num)
+ sta_track_add(hapd->iface, mgmt->sa);
+ 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;
+ }
+
+ /*
+ * 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 && 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;
+ }
+
+#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 (!(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 */
+
+ 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;
+ }
+
+#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, 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);
}
-void ieee802_11_set_beacon(struct hostapd_data *hapd)
+static u8 * hostapd_probe_resp_offloads(struct hostapd_data *hapd,
+ size_t *resp_len)
{
- struct ieee80211_mgmt *head;
- u8 *pos, *tail, *tailpos;
- u16 capab_info;
- size_t head_len, tail_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 | P2P_GROUP_OWNER)) == P2P_ENABLED)
- goto no_beacon;
-#endif /* 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, 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
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 */
+
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;
+ return -1;
}
head->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
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);
+ capab_info = hostapd_own_capab_info(hapd);
head->u.beacon.capab_info = host_to_le16(capab_info);
pos = &head->u.beacon.variable[0];
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);
/* RSN, MDIE, WPA */
tailpos = hostapd_eid_wpa(hapd, tailpos, tail + BEACON_TAIL_BUF_SIZE -
- tailpos, NULL);
+ tailpos);
+
+ tailpos = hostapd_eid_rm_enabled_capab(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->cs_c_off_beacon);
+
+#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) {
+ tailpos = hostapd_eid_vht_capabilities(hapd, tailpos);
+ tailpos = hostapd_eid_vht_operation(hapd, tailpos);
+ }
+ if (hapd->conf->vendor_vht)
+ tailpos = hostapd_eid_vendor_vht(hapd, tailpos);
+#endif /* CONFIG_IEEE80211AC */
+
/* Wi-Fi Alliance WMM */
tailpos = hostapd_eid_wmm(hapd, tailpos);
tailpos = hostapd_eid_p2p_manage(hapd, tailpos);
#endif /* CONFIG_P2P_MANAGER */
- tail_len = tailpos > tail ? tailpos - tail : 0;
+#ifdef CONFIG_HS20
+ tailpos = hostapd_eid_hs20_indication(hapd, tailpos);
+ tailpos = hostapd_eid_osen(hapd, tailpos);
+#endif /* CONFIG_HS20 */
- if (hapd->drv.set_beacon(hapd, (u8 *) head, head_len,
- tail, tail_len, hapd->conf->dtim_period,
- hapd->iconf->beacon_int))
- wpa_printf(MSG_ERROR, "Failed to set beacon head/tail or DTIM "
- "period");
+ 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);
+ }
- os_free(tail);
- os_free(head);
+ 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;
+ 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->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;
+ params->smps_mode = hapd->iconf->ht_capab & HT_CAP_INFO_SMPS_MASK;
+#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
-no_beacon:
+ params->p2p_go_ctwindow = hapd->iconf->p2p_go_ctwindow;
#endif /* CONFIG_P2P */
- hapd->drv.set_bss_params(hapd, !!(ieee802_11_erp_info(hapd) &
- ERP_INFO_USE_PROTECTION));
+#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_set_beacons(struct hostapd_iface *iface)
+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->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;
+ hapd->reenable_beacon = 0;
+
+ 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;
- for (i = 0; i < iface->num_bss; i++)
- ieee802_11_set_beacon(iface->bss[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 */
projects / mech_eap.git / blobdiff