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mac80211: Add support for BSS max idle period element

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Parse the BSS max idle period element and set the BSS configuration
accordingly so the driver can use this information to configure the
max idle period and to use protected management frames for keep alive
when required.

The BSS max idle period element is defined in IEEE802.11-2016,
section 9.4.2.79

Signed-off-by: Avraham Stern <avraham.stern@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Avraham Stern
2017-04-26 10:58:47 +03:00
committed by Johannes Berg
parent 29ce6ecbb8
commit e38a017bf0
5 changed files with 63 additions and 3 deletions
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1
net/mac80211/ieee80211_i.h
View File

@@ -1483,6 +1483,7 @@ struct ieee802_11_elems {
const u8 *opmode_notif;
const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
const struct ieee80211_mesh_chansw_params_ie *mesh_chansw_params_ie;
const struct ieee80211_bss_max_idle_period_ie *max_idle_period_ie;
/* length of them, respectively */
u8 ext_capab_len;

14
net/mac80211/mlme.c
View File

@@ -6,7 +6,7 @@
* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
* Copyright 2007, Michael Wu <flamingice@sourmilk.net>
* Copyright 2013-2014 Intel Mobile Communications GmbH
* Copyright (C) 2015 - 2016 Intel Deutschland GmbH
* Copyright (C) 2015 - 2017 Intel Deutschland GmbH
*
* 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
@@ -3098,6 +3098,18 @@ static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
}
changed |= BSS_CHANGED_QOS;
if (elems.max_idle_period_ie) {
bss_conf->max_idle_period =
le16_to_cpu(elems.max_idle_period_ie->max_idle_period);
bss_conf->protected_keep_alive =
!!(elems.max_idle_period_ie->idle_options &
WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
changed |= BSS_CHANGED_KEEP_ALIVE;
} else {
bss_conf->max_idle_period = 0;
bss_conf->protected_keep_alive = false;
}
/* set AID and assoc capability,
* ieee80211_set_associated() will tell the driver */
bss_conf->aid = aid;

9
net/mac80211/util.c
View File

@@ -828,6 +828,7 @@ u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
case WLAN_EID_EXT_CAPABILITY:
case WLAN_EID_CHAN_SWITCH_TIMING:
case WLAN_EID_LINK_ID:
case WLAN_EID_BSS_MAX_IDLE_PERIOD:
/*
* not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
* that if the content gets bigger it might be needed more than once
@@ -1089,6 +1090,10 @@ u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
else
elem_parse_failed = true;
break;
case WLAN_EID_BSS_MAX_IDLE_PERIOD:
if (elen >= sizeof(*elems->max_idle_period_ie))
elems->max_idle_period_ie = (void *)pos;
break;
default:
break;
}
@@ -1983,6 +1988,10 @@ int ieee80211_reconfig(struct ieee80211_local *local)
if (sdata->u.mgd.have_beacon)
changed |= BSS_CHANGED_BEACON_INFO;
if (sdata->vif.bss_conf.max_idle_period ||
sdata->vif.bss_conf.protected_keep_alive)
changed |= BSS_CHANGED_KEEP_ALIVE;
sdata_lock(sdata);
ieee80211_bss_info_change_notify(sdata, changed);
sdata_unlock(sdata);