hostapd/src/ap/wnm_ap.c

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/*
* hostapd - WNM
* Copyright (c) 2011-2014, Qualcomm Atheros, Inc.
*
* 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 "utils/eloop.h"
#include "common/ieee802_11_defs.h"
#include "common/wpa_ctrl.h"
#include "common/ocv.h"
#include "ap/hostapd.h"
#include "ap/sta_info.h"
#include "ap/ap_config.h"
#include "ap/ap_drv_ops.h"
#include "ap/wpa_auth.h"
#include "mbo_ap.h"
#include "wnm_ap.h"
#define MAX_TFS_IE_LEN 1024
/* get the TFS IE from driver */
static int ieee80211_11_get_tfs_ie(struct hostapd_data *hapd, const u8 *addr,
u8 *buf, u16 *buf_len, enum wnm_oper oper)
{
wpa_printf(MSG_DEBUG, "%s: TFS get operation %d", __func__, oper);
return hostapd_drv_wnm_oper(hapd, oper, addr, buf, buf_len);
}
/* set the TFS IE to driver */
static int ieee80211_11_set_tfs_ie(struct hostapd_data *hapd, const u8 *addr,
u8 *buf, u16 *buf_len, enum wnm_oper oper)
{
wpa_printf(MSG_DEBUG, "%s: TFS set operation %d", __func__, oper);
return hostapd_drv_wnm_oper(hapd, oper, addr, buf, buf_len);
}
/* MLME-SLEEPMODE.response */
static int ieee802_11_send_wnmsleep_resp(struct hostapd_data *hapd,
const u8 *addr, u8 dialog_token,
u8 action_type, u16 intval)
{
struct ieee80211_mgmt *mgmt;
int res;
size_t len;
size_t gtk_elem_len = 0;
size_t igtk_elem_len = 0;
size_t bigtk_elem_len = 0;
struct wnm_sleep_element wnmsleep_ie;
u8 *wnmtfs_ie, *oci_ie;
u8 wnmsleep_ie_len, oci_ie_len;
u16 wnmtfs_ie_len;
u8 *pos;
struct sta_info *sta;
enum wnm_oper tfs_oper = action_type == WNM_SLEEP_MODE_ENTER ?
WNM_SLEEP_TFS_RESP_IE_ADD : WNM_SLEEP_TFS_RESP_IE_NONE;
sta = ap_get_sta(hapd, addr);
if (sta == NULL) {
wpa_printf(MSG_DEBUG, "%s: station not found", __func__);
return -EINVAL;
}
/* WNM-Sleep Mode IE */
os_memset(&wnmsleep_ie, 0, sizeof(struct wnm_sleep_element));
wnmsleep_ie_len = sizeof(struct wnm_sleep_element);
wnmsleep_ie.eid = WLAN_EID_WNMSLEEP;
wnmsleep_ie.len = wnmsleep_ie_len - 2;
wnmsleep_ie.action_type = action_type;
wnmsleep_ie.status = WNM_STATUS_SLEEP_ACCEPT;
wnmsleep_ie.intval = host_to_le16(intval);
/* TFS IE(s) */
wnmtfs_ie = os_zalloc(MAX_TFS_IE_LEN);
if (wnmtfs_ie == NULL)
return -1;
if (ieee80211_11_get_tfs_ie(hapd, addr, wnmtfs_ie, &wnmtfs_ie_len,
tfs_oper)) {
wnmtfs_ie_len = 0;
os_free(wnmtfs_ie);
wnmtfs_ie = NULL;
}
oci_ie = NULL;
oci_ie_len = 0;
#ifdef CONFIG_OCV
if (action_type == WNM_SLEEP_MODE_EXIT &&
wpa_auth_uses_ocv(sta->wpa_sm)) {
struct wpa_channel_info ci;
if (hostapd_drv_channel_info(hapd, &ci) != 0) {
wpa_printf(MSG_WARNING,
"Failed to get channel info for OCI element in WNM-Sleep Mode frame");
os_free(wnmtfs_ie);
return -1;
}
oci_ie_len = OCV_OCI_EXTENDED_LEN;
oci_ie = os_zalloc(oci_ie_len);
if (!oci_ie) {
wpa_printf(MSG_WARNING,
"Failed to allocate buffer for OCI element in WNM-Sleep Mode frame");
os_free(wnmtfs_ie);
return -1;
}
if (ocv_insert_extended_oci(&ci, oci_ie) < 0) {
os_free(wnmtfs_ie);
os_free(oci_ie);
return -1;
}
}
#endif /* CONFIG_OCV */
#define MAX_GTK_SUBELEM_LEN 45
#define MAX_IGTK_SUBELEM_LEN 26
#define MAX_BIGTK_SUBELEM_LEN 26
mgmt = os_zalloc(sizeof(*mgmt) + wnmsleep_ie_len +
MAX_GTK_SUBELEM_LEN + MAX_IGTK_SUBELEM_LEN +
MAX_BIGTK_SUBELEM_LEN +
oci_ie_len);
if (mgmt == NULL) {
wpa_printf(MSG_DEBUG, "MLME: Failed to allocate buffer for "
"WNM-Sleep Response action frame");
res = -1;
goto fail;
}
os_memcpy(mgmt->da, addr, ETH_ALEN);
os_memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN);
os_memcpy(mgmt->bssid, hapd->own_addr, ETH_ALEN);
mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
WLAN_FC_STYPE_ACTION);
mgmt->u.action.category = WLAN_ACTION_WNM;
mgmt->u.action.u.wnm_sleep_resp.action = WNM_SLEEP_MODE_RESP;
mgmt->u.action.u.wnm_sleep_resp.dialogtoken = dialog_token;
pos = (u8 *)mgmt->u.action.u.wnm_sleep_resp.variable;
/* add key data if MFP is enabled */
if (!wpa_auth_uses_mfp(sta->wpa_sm) ||
hapd->conf->wnm_sleep_mode_no_keys ||
action_type != WNM_SLEEP_MODE_EXIT) {
mgmt->u.action.u.wnm_sleep_resp.keydata_len = 0;
} else {
gtk_elem_len = wpa_wnmsleep_gtk_subelem(sta->wpa_sm, pos);
pos += gtk_elem_len;
wpa_printf(MSG_DEBUG, "Pass 4, gtk_len = %d",
(int) gtk_elem_len);
res = wpa_wnmsleep_igtk_subelem(sta->wpa_sm, pos);
if (res < 0)
goto fail;
igtk_elem_len = res;
pos += igtk_elem_len;
wpa_printf(MSG_DEBUG, "Pass 4 igtk_len = %d",
(int) igtk_elem_len);
if (hapd->conf->beacon_prot) {
res = wpa_wnmsleep_bigtk_subelem(sta->wpa_sm, pos);
if (res < 0)
goto fail;
bigtk_elem_len = res;
pos += bigtk_elem_len;
wpa_printf(MSG_DEBUG, "Pass 4 bigtk_len = %d",
(int) bigtk_elem_len);
}
WPA_PUT_LE16((u8 *)
&mgmt->u.action.u.wnm_sleep_resp.keydata_len,
gtk_elem_len + igtk_elem_len + bigtk_elem_len);
}
os_memcpy(pos, &wnmsleep_ie, wnmsleep_ie_len);
/* copy TFS IE here */
pos += wnmsleep_ie_len;
if (wnmtfs_ie) {
os_memcpy(pos, wnmtfs_ie, wnmtfs_ie_len);
pos += wnmtfs_ie_len;
}
#ifdef CONFIG_OCV
/* copy OCV OCI here */
if (oci_ie_len > 0)
os_memcpy(pos, oci_ie, oci_ie_len);
#endif /* CONFIG_OCV */
len = 1 + sizeof(mgmt->u.action.u.wnm_sleep_resp) + gtk_elem_len +
igtk_elem_len + bigtk_elem_len +
wnmsleep_ie_len + wnmtfs_ie_len + oci_ie_len;
/* In driver, response frame should be forced to sent when STA is in
* PS mode */
res = hostapd_drv_send_action(hapd, hapd->iface->freq, 0,
mgmt->da, &mgmt->u.action.category, len);
if (!res) {
wpa_printf(MSG_DEBUG, "Successfully send WNM-Sleep Response "
"frame");
/* when entering wnmsleep
* 1. pause the node in driver
* 2. mark the node so that AP won't update GTK/IGTK/BIGTK
* during WNM Sleep
*/
if (wnmsleep_ie.status == WNM_STATUS_SLEEP_ACCEPT &&
wnmsleep_ie.action_type == WNM_SLEEP_MODE_ENTER) {
sta->flags |= WLAN_STA_WNM_SLEEP_MODE;
hostapd_drv_wnm_oper(hapd, WNM_SLEEP_ENTER_CONFIRM,
addr, NULL, NULL);
wpa_set_wnmsleep(sta->wpa_sm, 1);
}
/* when exiting wnmsleep
* 1. unmark the node
* 2. start GTK/IGTK/BIGTK update if MFP is not used
* 3. unpause the node in driver
*/
if ((wnmsleep_ie.status == WNM_STATUS_SLEEP_ACCEPT ||
wnmsleep_ie.status ==
WNM_STATUS_SLEEP_EXIT_ACCEPT_GTK_UPDATE) &&
wnmsleep_ie.action_type == WNM_SLEEP_MODE_EXIT) {
sta->flags &= ~WLAN_STA_WNM_SLEEP_MODE;
wpa_set_wnmsleep(sta->wpa_sm, 0);
hostapd_drv_wnm_oper(hapd, WNM_SLEEP_EXIT_CONFIRM,
addr, NULL, NULL);
if (!wpa_auth_uses_mfp(sta->wpa_sm) ||
hapd->conf->wnm_sleep_mode_no_keys)
wpa_wnmsleep_rekey_gtk(sta->wpa_sm);
}
} else
wpa_printf(MSG_DEBUG, "Fail to send WNM-Sleep Response frame");
#undef MAX_GTK_SUBELEM_LEN
#undef MAX_IGTK_SUBELEM_LEN
#undef MAX_BIGTK_SUBELEM_LEN
fail:
os_free(wnmtfs_ie);
os_free(oci_ie);
os_free(mgmt);
return res;
}
static void ieee802_11_rx_wnmsleep_req(struct hostapd_data *hapd,
const u8 *addr, const u8 *frm, int len)
{
/* Dialog Token [1] | WNM-Sleep Mode IE | TFS Response IE */
const u8 *pos = frm;
u8 dialog_token;
struct wnm_sleep_element *wnmsleep_ie = NULL;
/* multiple TFS Req IE (assuming consecutive) */
u8 *tfsreq_ie_start = NULL;
u8 *tfsreq_ie_end = NULL;
u16 tfsreq_ie_len = 0;
#ifdef CONFIG_OCV
struct sta_info *sta;
const u8 *oci_ie = NULL;
u8 oci_ie_len = 0;
#endif /* CONFIG_OCV */
if (!hapd->conf->wnm_sleep_mode) {
wpa_printf(MSG_DEBUG, "Ignore WNM-Sleep Mode Request from "
MACSTR " since WNM-Sleep Mode is disabled",
MAC2STR(addr));
return;
}
WNM: Fix WNM-Sleep Mode Request bounds checking ieee802_11_rx_wnmsleep_req() might have been called for a short frame that has no more payload after the Public Action field, i.e., with len == 0. The bounds checking for the payload length was done only for the information elements while the one octet Dialog Token field was read unconditionally. In the original implementation, this could have resulted in reading one octet beyond the end of the received frame data. This case has not been reachable after the commit e0785ebbbd18 ("Use more consistent Action frame RX handling in both AP mode paths"), but it is better to address the specific issue in ieee802_11_rx_wnmsleep_req() as well for additional protection against accidential removal of the check and also to have something that can be merged into an older version (pre-v2.7) if desired. The comments below apply for such older versions where the case could have been reachable. Depending on driver interface specific mechanism used for fetching the frame, this could result in reading one octet beyond the end of a stack/hash buffer or reading an uninitialized octet from within a buffer. The actual value that was read as the Dialog Token field is not used since the function returns immediately after having read this value when there is no information elements following the field. This issue was initially added in commit d32d94dbf47a ("WNM: Add WNM-Sleep Mode implementation for AP") (with CONFIG_IEEE80211V=y build option) and it remained in place during number of cleanup and fix changes in this area and renaming of the build parameter to CONFIG_WNM=y. The impacted function was not included in any default build without one of the these optional build options being explicitly enabled. CONFIG_WNM=y is still documented as "experimental and not complete implementation" in hostapd/defconfig. In addition, commit 114f2830d2c2 ("WNM: Ignore WNM-Sleep Mode Request in wnm_sleep_mode=0 case") made this function exit before the impact read if WNM-Sleep Mode support was not explicitly enabled in runtime configuration (wnm_sleep_mode=1 in hostapd.conf). Commit e0785ebbbd18 ("Use more consistent Action frame RX handling in both AP mode paths") made this code unreachable in practice. Add an explicit check that the frame has enough payload before reading the Dialog Token field in ieee802_11_rx_wnmsleep_req(). Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
2018-10-29 19:48:07 +01:00
if (len < 1) {
wpa_printf(MSG_DEBUG,
"WNM: Ignore too short WNM-Sleep Mode Request from "
MACSTR, MAC2STR(addr));
return;
}
dialog_token = *pos++;
while (pos + 1 < frm + len) {
u8 ie_len = pos[1];
if (pos + 2 + ie_len > frm + len)
break;
if (*pos == WLAN_EID_WNMSLEEP &&
ie_len >= (int) sizeof(*wnmsleep_ie) - 2)
wnmsleep_ie = (struct wnm_sleep_element *) pos;
else if (*pos == WLAN_EID_TFS_REQ) {
if (!tfsreq_ie_start)
tfsreq_ie_start = (u8 *) pos;
tfsreq_ie_end = (u8 *) pos;
#ifdef CONFIG_OCV
} else if (*pos == WLAN_EID_EXTENSION && ie_len >= 1 &&
pos[2] == WLAN_EID_EXT_OCV_OCI) {
oci_ie = pos + 3;
oci_ie_len = ie_len - 1;
#endif /* CONFIG_OCV */
} else
wpa_printf(MSG_DEBUG, "WNM: EID %d not recognized",
*pos);
pos += ie_len + 2;
}
if (!wnmsleep_ie) {
wpa_printf(MSG_DEBUG, "No WNM-Sleep IE found");
return;
}
#ifdef CONFIG_OCV
sta = ap_get_sta(hapd, addr);
if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT &&
sta && wpa_auth_uses_ocv(sta->wpa_sm)) {
struct wpa_channel_info ci;
if (hostapd_drv_channel_info(hapd, &ci) != 0) {
wpa_printf(MSG_WARNING,
"Failed to get channel info to validate received OCI in WNM-Sleep Mode frame");
return;
}
if (ocv_verify_tx_params(oci_ie, oci_ie_len, &ci,
channel_width_to_int(ci.chanwidth),
ci.seg1_idx) != 0) {
wpa_msg(hapd, MSG_WARNING, "WNM: %s", ocv_errorstr);
return;
}
}
#endif /* CONFIG_OCV */
if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER &&
tfsreq_ie_start && tfsreq_ie_end &&
tfsreq_ie_end - tfsreq_ie_start >= 0) {
tfsreq_ie_len = (tfsreq_ie_end + tfsreq_ie_end[1] + 2) -
tfsreq_ie_start;
wpa_printf(MSG_DEBUG, "TFS Req IE(s) found");
/* pass the TFS Req IE(s) to driver for processing */
if (ieee80211_11_set_tfs_ie(hapd, addr, tfsreq_ie_start,
&tfsreq_ie_len,
WNM_SLEEP_TFS_REQ_IE_SET))
wpa_printf(MSG_DEBUG, "Fail to set TFS Req IE");
}
ieee802_11_send_wnmsleep_resp(hapd, addr, dialog_token,
wnmsleep_ie->action_type,
le_to_host16(wnmsleep_ie->intval));
if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT) {
/* clear the tfs after sending the resp frame */
ieee80211_11_set_tfs_ie(hapd, addr, tfsreq_ie_start,
&tfsreq_ie_len, WNM_SLEEP_TFS_IE_DEL);
}
}
static int ieee802_11_send_bss_trans_mgmt_request(struct hostapd_data *hapd,
const u8 *addr,
u8 dialog_token)
{
struct ieee80211_mgmt *mgmt;
size_t len;
u8 *pos;
int res;
mgmt = os_zalloc(sizeof(*mgmt));
if (mgmt == NULL)
return -1;
os_memcpy(mgmt->da, addr, ETH_ALEN);
os_memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN);
os_memcpy(mgmt->bssid, hapd->own_addr, ETH_ALEN);
mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
WLAN_FC_STYPE_ACTION);
mgmt->u.action.category = WLAN_ACTION_WNM;
mgmt->u.action.u.bss_tm_req.action = WNM_BSS_TRANS_MGMT_REQ;
mgmt->u.action.u.bss_tm_req.dialog_token = dialog_token;
mgmt->u.action.u.bss_tm_req.req_mode = 0;
mgmt->u.action.u.bss_tm_req.disassoc_timer = host_to_le16(0);
mgmt->u.action.u.bss_tm_req.validity_interval = 1;
pos = mgmt->u.action.u.bss_tm_req.variable;
wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Request to "
MACSTR " dialog_token=%u req_mode=0x%x disassoc_timer=%u "
"validity_interval=%u",
MAC2STR(addr), dialog_token,
mgmt->u.action.u.bss_tm_req.req_mode,
le_to_host16(mgmt->u.action.u.bss_tm_req.disassoc_timer),
mgmt->u.action.u.bss_tm_req.validity_interval);
len = pos - &mgmt->u.action.category;
res = hostapd_drv_send_action(hapd, hapd->iface->freq, 0,
mgmt->da, &mgmt->u.action.category, len);
os_free(mgmt);
return res;
}
static void ieee802_11_rx_bss_trans_mgmt_query(struct hostapd_data *hapd,
const u8 *addr, const u8 *frm,
size_t len)
{
u8 dialog_token, reason;
const u8 *pos, *end;
int enabled = hapd->conf->bss_transition;
#ifdef CONFIG_MBO
if (hapd->conf->mbo_enabled)
enabled = 1;
#endif /* CONFIG_MBO */
if (!enabled) {
wpa_printf(MSG_DEBUG,
"Ignore BSS Transition Management Query from "
MACSTR
" since BSS Transition Management is disabled",
MAC2STR(addr));
return;
}
if (len < 2) {
wpa_printf(MSG_DEBUG, "WNM: Ignore too short BSS Transition Management Query from "
MACSTR, MAC2STR(addr));
return;
}
pos = frm;
end = pos + len;
dialog_token = *pos++;
reason = *pos++;
wpa_printf(MSG_DEBUG, "WNM: BSS Transition Management Query from "
MACSTR " dialog_token=%u reason=%u",
MAC2STR(addr), dialog_token, reason);
wpa_hexdump(MSG_DEBUG, "WNM: BSS Transition Candidate List Entries",
pos, end - pos);
ieee802_11_send_bss_trans_mgmt_request(hapd, addr, dialog_token);
}
void ap_sta_reset_steer_flag_timer(void *eloop_ctx, void *timeout_ctx)
{
struct hostapd_data *hapd = eloop_ctx;
struct sta_info *sta = timeout_ctx;
if (sta->agreed_to_steer) {
wpa_printf(MSG_DEBUG, "%s: Reset steering flag for STA " MACSTR,
hapd->conf->iface, MAC2STR(sta->addr));
sta->agreed_to_steer = 0;
}
}
static void ieee802_11_rx_bss_trans_mgmt_resp(struct hostapd_data *hapd,
const u8 *addr, const u8 *frm,
size_t len)
{
u8 dialog_token, status_code, bss_termination_delay;
const u8 *pos, *end;
int enabled = hapd->conf->bss_transition;
struct sta_info *sta;
#ifdef CONFIG_MBO
if (hapd->conf->mbo_enabled)
enabled = 1;
#endif /* CONFIG_MBO */
if (!enabled) {
wpa_printf(MSG_DEBUG,
"Ignore BSS Transition Management Response from "
MACSTR
" since BSS Transition Management is disabled",
MAC2STR(addr));
return;
}
if (len < 3) {
wpa_printf(MSG_DEBUG, "WNM: Ignore too short BSS Transition Management Response from "
MACSTR, MAC2STR(addr));
return;
}
pos = frm;
end = pos + len;
dialog_token = *pos++;
status_code = *pos++;
bss_termination_delay = *pos++;
wpa_printf(MSG_DEBUG, "WNM: BSS Transition Management Response from "
MACSTR " dialog_token=%u status_code=%u "
"bss_termination_delay=%u", MAC2STR(addr), dialog_token,
status_code, bss_termination_delay);
sta = ap_get_sta(hapd, addr);
if (!sta) {
wpa_printf(MSG_DEBUG, "Station " MACSTR
" not found for received BSS TM Response",
MAC2STR(addr));
return;
}
if (status_code == WNM_BSS_TM_ACCEPT) {
if (end - pos < ETH_ALEN) {
wpa_printf(MSG_DEBUG, "WNM: not enough room for Target BSSID field");
return;
}
sta->agreed_to_steer = 1;
eloop_cancel_timeout(ap_sta_reset_steer_flag_timer, hapd, sta);
eloop_register_timeout(2, 0, ap_sta_reset_steer_flag_timer,
hapd, sta);
wpa_printf(MSG_DEBUG, "WNM: Target BSSID: " MACSTR,
MAC2STR(pos));
wpa_msg(hapd->msg_ctx, MSG_INFO, BSS_TM_RESP MACSTR
" status_code=%u bss_termination_delay=%u target_bssid="
MACSTR,
MAC2STR(addr), status_code, bss_termination_delay,
MAC2STR(pos));
pos += ETH_ALEN;
} else {
sta->agreed_to_steer = 0;
wpa_msg(hapd->msg_ctx, MSG_INFO, BSS_TM_RESP MACSTR
" status_code=%u bss_termination_delay=%u",
MAC2STR(addr), status_code, bss_termination_delay);
}
wpa_hexdump(MSG_DEBUG, "WNM: BSS Transition Candidate List Entries",
pos, end - pos);
}
static void ieee802_11_rx_wnm_notification_req(struct hostapd_data *hapd,
const u8 *addr, const u8 *buf,
size_t len)
{
u8 dialog_token, type;
if (len < 2)
return;
dialog_token = *buf++;
type = *buf++;
len -= 2;
wpa_printf(MSG_DEBUG,
"WNM: Received WNM Notification Request frame from "
MACSTR " (dialog_token=%u type=%u)",
MAC2STR(addr), dialog_token, type);
wpa_hexdump(MSG_MSGDUMP, "WNM: Notification Request subelements",
buf, len);
if (type == WLAN_EID_VENDOR_SPECIFIC)
mbo_ap_wnm_notification_req(hapd, addr, buf, len);
}
WNM: Collocated Interference Reporting Add support for negotiating WNM Collocated Interference Reporting. This allows hostapd to request associated STAs to report their collocated interference information and wpa_supplicant to process such request and reporting. The actual values (Collocated Interference Report Elements) are out of scope of hostapd and wpa_supplicant, i.e., external components are expected to generated and process these. For hostapd/AP, this mechanism is enabled by setting coloc_intf_reporting=1 in configuration. STAs are requested to perform reporting with "COLOC_INTF_REQ <addr> <Automatic Report Enabled> <Report Timeout>" control interface command. The received reports are indicated as control interface events "COLOC-INTF-REPORT <addr> <dialog token> <hexdump of report elements>". For wpa_supplicant/STA, this mechanism is enabled by setting coloc_intf_reporting=1 in configuration and setting Collocated Interference Report Elements as a hexdump with "SET coloc_intf_elems <hexdump>" control interface command. The hexdump can contain one or more Collocated Interference Report Elements (each including the information element header). For additional testing purposes, received requests are reported with "COLOC-INTF-REQ <dialog token> <automatic report enabled> <report timeout>" control interface events and unsolicited reports can be sent with "COLOC_INTF_REPORT <hexdump>". This commit adds support for reporting changes in the collocated interference (Automatic Report Enabled == 1 and partial 3), but not for periodic reports (2 and other part of 3). Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
2018-10-30 13:00:00 +01:00
static void ieee802_11_rx_wnm_coloc_intf_report(struct hostapd_data *hapd,
const u8 *addr, const u8 *buf,
size_t len)
{
u8 dialog_token;
char *hex;
size_t hex_len;
if (!hapd->conf->coloc_intf_reporting) {
wpa_printf(MSG_DEBUG,
"WNM: Ignore unexpected Collocated Interference Report from "
MACSTR, MAC2STR(addr));
return;
}
if (len < 1) {
wpa_printf(MSG_DEBUG,
"WNM: Ignore too short Collocated Interference Report from "
MACSTR, MAC2STR(addr));
return;
}
dialog_token = *buf++;
len--;
wpa_printf(MSG_DEBUG,
"WNM: Received Collocated Interference Report frame from "
MACSTR " (dialog_token=%u)",
MAC2STR(addr), dialog_token);
wpa_hexdump(MSG_MSGDUMP, "WNM: Collocated Interference Report Elements",
buf, len);
hex_len = 2 * len + 1;
hex = os_malloc(hex_len);
if (!hex)
return;
wpa_snprintf_hex(hex, hex_len, buf, len);
wpa_msg_ctrl(hapd->msg_ctx, MSG_INFO, COLOC_INTF_REPORT MACSTR " %d %s",
MAC2STR(addr), dialog_token, hex);
os_free(hex);
}
int ieee802_11_rx_wnm_action_ap(struct hostapd_data *hapd,
const struct ieee80211_mgmt *mgmt, size_t len)
{
u8 action;
const u8 *payload;
size_t plen;
if (len < IEEE80211_HDRLEN + 2)
return -1;
payload = ((const u8 *) mgmt) + IEEE80211_HDRLEN + 1;
action = *payload++;
plen = len - IEEE80211_HDRLEN - 2;
switch (action) {
case WNM_BSS_TRANS_MGMT_QUERY:
ieee802_11_rx_bss_trans_mgmt_query(hapd, mgmt->sa, payload,
plen);
return 0;
case WNM_BSS_TRANS_MGMT_RESP:
ieee802_11_rx_bss_trans_mgmt_resp(hapd, mgmt->sa, payload,
plen);
return 0;
case WNM_SLEEP_MODE_REQ:
ieee802_11_rx_wnmsleep_req(hapd, mgmt->sa, payload, plen);
return 0;
case WNM_NOTIFICATION_REQ:
ieee802_11_rx_wnm_notification_req(hapd, mgmt->sa, payload,
plen);
return 0;
WNM: Collocated Interference Reporting Add support for negotiating WNM Collocated Interference Reporting. This allows hostapd to request associated STAs to report their collocated interference information and wpa_supplicant to process such request and reporting. The actual values (Collocated Interference Report Elements) are out of scope of hostapd and wpa_supplicant, i.e., external components are expected to generated and process these. For hostapd/AP, this mechanism is enabled by setting coloc_intf_reporting=1 in configuration. STAs are requested to perform reporting with "COLOC_INTF_REQ <addr> <Automatic Report Enabled> <Report Timeout>" control interface command. The received reports are indicated as control interface events "COLOC-INTF-REPORT <addr> <dialog token> <hexdump of report elements>". For wpa_supplicant/STA, this mechanism is enabled by setting coloc_intf_reporting=1 in configuration and setting Collocated Interference Report Elements as a hexdump with "SET coloc_intf_elems <hexdump>" control interface command. The hexdump can contain one or more Collocated Interference Report Elements (each including the information element header). For additional testing purposes, received requests are reported with "COLOC-INTF-REQ <dialog token> <automatic report enabled> <report timeout>" control interface events and unsolicited reports can be sent with "COLOC_INTF_REPORT <hexdump>". This commit adds support for reporting changes in the collocated interference (Automatic Report Enabled == 1 and partial 3), but not for periodic reports (2 and other part of 3). Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
2018-10-30 13:00:00 +01:00
case WNM_COLLOCATED_INTERFERENCE_REPORT:
ieee802_11_rx_wnm_coloc_intf_report(hapd, mgmt->sa, payload,
plen);
return 0;
}
wpa_printf(MSG_DEBUG, "WNM: Unsupported WNM Action %u from " MACSTR,
action, MAC2STR(mgmt->sa));
return -1;
}
int wnm_send_disassoc_imminent(struct hostapd_data *hapd,
struct sta_info *sta, int disassoc_timer)
{
u8 buf[1000], *pos;
struct ieee80211_mgmt *mgmt;
os_memset(buf, 0, sizeof(buf));
mgmt = (struct ieee80211_mgmt *) buf;
mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
WLAN_FC_STYPE_ACTION);
os_memcpy(mgmt->da, sta->addr, ETH_ALEN);
os_memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN);
os_memcpy(mgmt->bssid, hapd->own_addr, ETH_ALEN);
mgmt->u.action.category = WLAN_ACTION_WNM;
mgmt->u.action.u.bss_tm_req.action = WNM_BSS_TRANS_MGMT_REQ;
mgmt->u.action.u.bss_tm_req.dialog_token = 1;
mgmt->u.action.u.bss_tm_req.req_mode =
WNM_BSS_TM_REQ_DISASSOC_IMMINENT;
mgmt->u.action.u.bss_tm_req.disassoc_timer =
host_to_le16(disassoc_timer);
mgmt->u.action.u.bss_tm_req.validity_interval = 0;
pos = mgmt->u.action.u.bss_tm_req.variable;
wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Request frame to indicate imminent disassociation (disassoc_timer=%d) to "
MACSTR, disassoc_timer, MAC2STR(sta->addr));
if (hostapd_drv_send_mlme(hapd, buf, pos - buf, 0, NULL, 0, 0) < 0) {
wpa_printf(MSG_DEBUG, "Failed to send BSS Transition "
"Management Request frame");
return -1;
}
return 0;
}
static void set_disassoc_timer(struct hostapd_data *hapd, struct sta_info *sta,
int disassoc_timer)
{
int timeout, beacon_int;
/*
* Prevent STA from reconnecting using cached PMKSA to force
* full authentication with the authentication server (which may
* decide to reject the connection),
*/
wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr);
beacon_int = hapd->iconf->beacon_int;
if (beacon_int < 1)
beacon_int = 100; /* best guess */
/* Calculate timeout in ms based on beacon_int in TU */
timeout = disassoc_timer * beacon_int * 128 / 125;
wpa_printf(MSG_DEBUG, "Disassociation timer for " MACSTR
" set to %d ms", MAC2STR(sta->addr), timeout);
sta->timeout_next = STA_DISASSOC_FROM_CLI;
eloop_cancel_timeout(ap_handle_timer, hapd, sta);
eloop_register_timeout(timeout / 1000,
timeout % 1000 * 1000,
ap_handle_timer, hapd, sta);
}
int wnm_send_ess_disassoc_imminent(struct hostapd_data *hapd,
struct sta_info *sta, const char *url,
int disassoc_timer)
{
u8 buf[1000], *pos;
struct ieee80211_mgmt *mgmt;
size_t url_len;
os_memset(buf, 0, sizeof(buf));
mgmt = (struct ieee80211_mgmt *) buf;
mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
WLAN_FC_STYPE_ACTION);
os_memcpy(mgmt->da, sta->addr, ETH_ALEN);
os_memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN);
os_memcpy(mgmt->bssid, hapd->own_addr, ETH_ALEN);
mgmt->u.action.category = WLAN_ACTION_WNM;
mgmt->u.action.u.bss_tm_req.action = WNM_BSS_TRANS_MGMT_REQ;
mgmt->u.action.u.bss_tm_req.dialog_token = 1;
mgmt->u.action.u.bss_tm_req.req_mode =
WNM_BSS_TM_REQ_DISASSOC_IMMINENT |
WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT;
mgmt->u.action.u.bss_tm_req.disassoc_timer =
host_to_le16(disassoc_timer);
mgmt->u.action.u.bss_tm_req.validity_interval = 0x01;
pos = mgmt->u.action.u.bss_tm_req.variable;
/* Session Information URL */
url_len = os_strlen(url);
if (url_len > 255)
return -1;
*pos++ = url_len;
os_memcpy(pos, url, url_len);
pos += url_len;
if (hostapd_drv_send_mlme(hapd, buf, pos - buf, 0, NULL, 0, 0) < 0) {
wpa_printf(MSG_DEBUG, "Failed to send BSS Transition "
"Management Request frame");
return -1;
}
if (disassoc_timer) {
/* send disassociation frame after time-out */
set_disassoc_timer(hapd, sta, disassoc_timer);
}
return 0;
}
int wnm_send_bss_tm_req(struct hostapd_data *hapd, struct sta_info *sta,
u8 req_mode, int disassoc_timer, u8 valid_int,
const u8 *bss_term_dur, const char *url,
const u8 *nei_rep, size_t nei_rep_len,
const u8 *mbo_attrs, size_t mbo_len)
{
u8 *buf, *pos;
struct ieee80211_mgmt *mgmt;
size_t url_len;
wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Request to "
MACSTR " req_mode=0x%x disassoc_timer=%d valid_int=0x%x",
MAC2STR(sta->addr), req_mode, disassoc_timer, valid_int);
buf = os_zalloc(1000 + nei_rep_len + mbo_len);
if (buf == NULL)
return -1;
mgmt = (struct ieee80211_mgmt *) buf;
mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
WLAN_FC_STYPE_ACTION);
os_memcpy(mgmt->da, sta->addr, ETH_ALEN);
os_memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN);
os_memcpy(mgmt->bssid, hapd->own_addr, ETH_ALEN);
mgmt->u.action.category = WLAN_ACTION_WNM;
mgmt->u.action.u.bss_tm_req.action = WNM_BSS_TRANS_MGMT_REQ;
mgmt->u.action.u.bss_tm_req.dialog_token = 1;
mgmt->u.action.u.bss_tm_req.req_mode = req_mode;
mgmt->u.action.u.bss_tm_req.disassoc_timer =
host_to_le16(disassoc_timer);
mgmt->u.action.u.bss_tm_req.validity_interval = valid_int;
pos = mgmt->u.action.u.bss_tm_req.variable;
if ((req_mode & WNM_BSS_TM_REQ_BSS_TERMINATION_INCLUDED) &&
bss_term_dur) {
os_memcpy(pos, bss_term_dur, 12);
pos += 12;
}
if (url) {
/* Session Information URL */
url_len = os_strlen(url);
if (url_len > 255) {
os_free(buf);
return -1;
}
*pos++ = url_len;
os_memcpy(pos, url, url_len);
pos += url_len;
}
if (nei_rep) {
os_memcpy(pos, nei_rep, nei_rep_len);
pos += nei_rep_len;
}
if (mbo_len > 0) {
pos += mbo_add_ie(pos, buf + sizeof(buf) - pos, mbo_attrs,
mbo_len);
}
if (hostapd_drv_send_mlme(hapd, buf, pos - buf, 0, NULL, 0, 0) < 0) {
wpa_printf(MSG_DEBUG,
"Failed to send BSS Transition Management Request frame");
os_free(buf);
return -1;
}
os_free(buf);
if (disassoc_timer) {
/* send disassociation frame after time-out */
set_disassoc_timer(hapd, sta, disassoc_timer);
}
return 0;
}
WNM: Collocated Interference Reporting Add support for negotiating WNM Collocated Interference Reporting. This allows hostapd to request associated STAs to report their collocated interference information and wpa_supplicant to process such request and reporting. The actual values (Collocated Interference Report Elements) are out of scope of hostapd and wpa_supplicant, i.e., external components are expected to generated and process these. For hostapd/AP, this mechanism is enabled by setting coloc_intf_reporting=1 in configuration. STAs are requested to perform reporting with "COLOC_INTF_REQ <addr> <Automatic Report Enabled> <Report Timeout>" control interface command. The received reports are indicated as control interface events "COLOC-INTF-REPORT <addr> <dialog token> <hexdump of report elements>". For wpa_supplicant/STA, this mechanism is enabled by setting coloc_intf_reporting=1 in configuration and setting Collocated Interference Report Elements as a hexdump with "SET coloc_intf_elems <hexdump>" control interface command. The hexdump can contain one or more Collocated Interference Report Elements (each including the information element header). For additional testing purposes, received requests are reported with "COLOC-INTF-REQ <dialog token> <automatic report enabled> <report timeout>" control interface events and unsolicited reports can be sent with "COLOC_INTF_REPORT <hexdump>". This commit adds support for reporting changes in the collocated interference (Automatic Report Enabled == 1 and partial 3), but not for periodic reports (2 and other part of 3). Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
2018-10-30 13:00:00 +01:00
int wnm_send_coloc_intf_req(struct hostapd_data *hapd, struct sta_info *sta,
unsigned int auto_report, unsigned int timeout)
{
u8 buf[100], *pos;
struct ieee80211_mgmt *mgmt;
u8 dialog_token = 1;
if (auto_report > 3 || timeout > 63)
return -1;
os_memset(buf, 0, sizeof(buf));
mgmt = (struct ieee80211_mgmt *) buf;
mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
WLAN_FC_STYPE_ACTION);
os_memcpy(mgmt->da, sta->addr, ETH_ALEN);
os_memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN);
os_memcpy(mgmt->bssid, hapd->own_addr, ETH_ALEN);
mgmt->u.action.category = WLAN_ACTION_WNM;
mgmt->u.action.u.coloc_intf_req.action =
WNM_COLLOCATED_INTERFERENCE_REQ;
mgmt->u.action.u.coloc_intf_req.dialog_token = dialog_token;
mgmt->u.action.u.coloc_intf_req.req_info = auto_report | (timeout << 2);
pos = &mgmt->u.action.u.coloc_intf_req.req_info;
pos++;
wpa_printf(MSG_DEBUG, "WNM: Sending Collocated Interference Request to "
MACSTR " (dialog_token=%u auto_report=%u timeout=%u)",
MAC2STR(sta->addr), dialog_token, auto_report, timeout);
if (hostapd_drv_send_mlme(hapd, buf, pos - buf, 0, NULL, 0, 0) < 0) {
WNM: Collocated Interference Reporting Add support for negotiating WNM Collocated Interference Reporting. This allows hostapd to request associated STAs to report their collocated interference information and wpa_supplicant to process such request and reporting. The actual values (Collocated Interference Report Elements) are out of scope of hostapd and wpa_supplicant, i.e., external components are expected to generated and process these. For hostapd/AP, this mechanism is enabled by setting coloc_intf_reporting=1 in configuration. STAs are requested to perform reporting with "COLOC_INTF_REQ <addr> <Automatic Report Enabled> <Report Timeout>" control interface command. The received reports are indicated as control interface events "COLOC-INTF-REPORT <addr> <dialog token> <hexdump of report elements>". For wpa_supplicant/STA, this mechanism is enabled by setting coloc_intf_reporting=1 in configuration and setting Collocated Interference Report Elements as a hexdump with "SET coloc_intf_elems <hexdump>" control interface command. The hexdump can contain one or more Collocated Interference Report Elements (each including the information element header). For additional testing purposes, received requests are reported with "COLOC-INTF-REQ <dialog token> <automatic report enabled> <report timeout>" control interface events and unsolicited reports can be sent with "COLOC_INTF_REPORT <hexdump>". This commit adds support for reporting changes in the collocated interference (Automatic Report Enabled == 1 and partial 3), but not for periodic reports (2 and other part of 3). Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
2018-10-30 13:00:00 +01:00
wpa_printf(MSG_DEBUG,
"WNM: Failed to send Collocated Interference Request frame");
return -1;
}
return 0;
}