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WNM: Add advertisement of BSS max idle period

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If WNM is enabled for the build (CONFIG_WNM=y), add BSS max idle period
information to the (Re)Association Response frame from the AP and parse
this information on the station. For SME-in-wpa_supplicant case, add a
timer to handle periodic transmission of the keep-alive frame. The
actual request for the driver to transmit a frame is not yet
implemented.

Signed-hostap: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2012-05-27 17:35:00 -07:00
parent b80eb89d8e
commit b6668734ab
13 changed files with 143 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

1
src/ap/ieee802_11.c
View file

@ -876,6 +876,7 @@ static void send_assoc_resp(struct hostapd_data *hapd, struct sta_info *sta,
#endif /* CONFIG_IEEE80211N */
p = hostapd_eid_ext_capab(hapd, p);
p = hostapd_eid_bss_max_idle_period(hapd, p);
if (sta->flags & WLAN_STA_WMM)
p = hostapd_eid_wmm(hapd, p);

1
src/ap/ieee802_11.h
View file

@ -72,5 +72,6 @@ u8 * hostapd_eid_time_adv(struct hostapd_data *hapd, u8 *eid);
u8 * hostapd_eid_time_zone(struct hostapd_data *hapd, u8 *eid);
int hostapd_update_time_adv(struct hostapd_data *hapd);
void hostapd_client_poll_ok(struct hostapd_data *hapd, const u8 *addr);
u8 * hostapd_eid_bss_max_idle_period(struct hostapd_data *hapd, u8 *eid);
#endif /* IEEE802_11_H */

30
src/ap/ieee802_11_shared.c
View file

@ -1,6 +1,6 @@
/*
* hostapd / IEEE 802.11 Management
* Copyright (c) 2002-2010, Jouni Malinen <j@w1.fi>
* Copyright (c) 2002-2012, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
@ -397,3 +397,31 @@ int hostapd_update_time_adv(struct hostapd_data *hapd)
return 0;
}
u8 * hostapd_eid_bss_max_idle_period(struct hostapd_data *hapd, u8 *eid)
{
u8 *pos = eid;
#ifdef CONFIG_WNM
if (hapd->conf->ap_max_inactivity > 0) {
unsigned int val;
*pos++ = WLAN_EID_BSS_MAX_IDLE_PERIOD;
*pos++ = 3;
val = hapd->conf->ap_max_inactivity;
if (val > 68000)
val = 68000;
val *= 1000;
val /= 1024;
if (val == 0)
val = 1;
if (val > 65535)
val = 65535;
WPA_PUT_LE16(pos, val);
pos += 2;
*pos++ = 0x00; /* TODO: Protected Keep-Alive Required */
}
#endif /* CONFIG_WNM */
return pos;
}

11
src/common/ieee802_11_common.c
View file

@ -1,6 +1,6 @@
/*
* IEEE 802.11 Common routines
* Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi>
* Copyright (c) 2002-2012, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
@ -262,6 +262,15 @@ ParseRes ieee802_11_parse_elems(const u8 *start, size_t len,
elems->interworking = pos;
elems->interworking_len = elen;
break;
case WLAN_EID_EXT_CAPAB:
elems->ext_capab = pos;
elems->ext_capab_len = elen;
break;
case WLAN_EID_BSS_MAX_IDLE_PERIOD:
if (elen < 3)
break;
elems->bss_max_idle_period = pos;
break;
default:
unknown++;
if (!show_errors)

3
src/common/ieee802_11_common.h
View file

@ -38,6 +38,8 @@ struct ieee802_11_elems {
const u8 *link_id;
const u8 *interworking;
const u8 *hs20;
const u8 *ext_capab;
const u8 *bss_max_idle_period;
u8 ssid_len;
u8 supp_rates_len;
@ -65,6 +67,7 @@ struct ieee802_11_elems {
u8 p2p_len;
u8 interworking_len;
u8 hs20_len;
u8 ext_capab_len;
};
typedef enum { ParseOK = 0, ParseUnknown = 1, ParseFailed = -1 } ParseRes;

1
src/common/ieee802_11_defs.h
View file

@ -228,6 +228,7 @@
#define WLAN_EID_20_40_BSS_INTOLERANT 73
#define WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS 74
#define WLAN_EID_MMIE 76
#define WLAN_EID_BSS_MAX_IDLE_PERIOD 90
#define WLAN_EID_TFS_REQ 91
#define WLAN_EID_TFS_RESP 92
#define WLAN_EID_WNMSLEEP 93