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Add BSS_TM_REQ command to send BSS Transition Management Request

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hostapd control interface can now be used to request transmission of a
BSS Transition Management Request frame to a specified station.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
This commit is contained in:
Jouni Malinen 2014-11-22 11:31:03 +02:00 • committed by Jouni Malinen
parent 64d04af5cc
commit a30dff07fb
4 changed files with 323 additions and 25 deletions
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124
src/ap/wnm_ap.c
View file

@ -1,6 +1,6 @@
/*
* hostapd - WNM
* Copyright (c) 2011-2013, Qualcomm Atheros, Inc.
* Copyright (c) 2011-2014, Qualcomm Atheros, Inc.
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
@ -436,6 +436,34 @@ int wnm_send_disassoc_imminent(struct hostapd_data *hapd,
}
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)
@ -477,30 +505,78 @@ int wnm_send_ess_disassoc_imminent(struct hostapd_data *hapd,
return -1;
}
/* send disassociation frame after time-out */
if (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);
/* 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)
{
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);
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)
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 (hostapd_drv_send_mlme(hapd, buf, pos - buf, 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;

6
src/ap/wnm_ap.h
View file

@ -1,6 +1,6 @@
/*
* IEEE 802.11v WNM related functions and structures
* Copyright (c) 2011-2013, Qualcomm Atheros, Inc.
* Copyright (c) 2011-2014, Qualcomm Atheros, Inc.
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
@ -18,5 +18,9 @@ int wnm_send_disassoc_imminent(struct hostapd_data *hapd,
int wnm_send_ess_disassoc_imminent(struct hostapd_data *hapd,
struct sta_info *sta, const char *url,
int disassoc_timer);
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);
#endif /* WNM_AP_H */