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cfg80211: Add an attribute to set inactivity timeout in AP mode 

This patch adds an attribute, NL80211_ATTR_INACTIVITY_TIMEOUT,
to set the inactivity timeout which can be used to remove the
station in AP mode. This can be passed in NL80211_CMD_START_AP
and used by the drivers which have AP MLME in firmware but
don't support get_station() properly. To disable inactivity
timer in userspace, wpa_s for example, there is a new flag,
NL80211_FEATURE_INACTIVITY_TIMER, in nl80211_feature_flags
through which drivers can register their capability to use
the inactivity timeout to free the stations.

Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@qca.qualcomm.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Vasanthakumar Thiagarajan 2012-03-02 15:50:02 +05:30 committed by John W. Linville
parent d665508b98
commit 1b658f118b
3 changed files with 23 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
include/linux/nl80211.h
View File

@ -168,8 +168,8 @@
* %NL80211_ATTR_DTIM_PERIOD, %NL80211_ATTR_SSID,
* %NL80211_ATTR_HIDDEN_SSID, %NL80211_ATTR_CIPHERS_PAIRWISE,
* %NL80211_ATTR_CIPHER_GROUP, %NL80211_ATTR_WPA_VERSIONS,
* %NL80211_ATTR_AKM_SUITES, %NL80211_ATTR_PRIVACY and
* %NL80211_ATTR_AUTH_TYPE.
* %NL80211_ATTR_AKM_SUITES, %NL80211_ATTR_PRIVACY,
* %NL80211_ATTR_AUTH_TYPE and %NL80211_ATTR_INACTIVITY_TIMEOUT.
* @NL80211_CMD_NEW_BEACON: old alias for %NL80211_CMD_START_AP
* @NL80211_CMD_STOP_AP: Stop AP operation on the given interface
* @NL80211_CMD_DEL_BEACON: old alias for %NL80211_CMD_STOP_AP
@ -1197,6 +1197,12 @@ enum nl80211_commands {
* @NL80211_ATTR_NOACK_MAP: This u16 bitmap contains the No Ack Policy of
* up to 16 TIDs.
*
* @NL80211_ATTR_INACTIVITY_TIMEOUT: timeout value in seconds, this can be
* used by the drivers which has MLME in firmware and does not have support
* to report per station tx/rx activity to free up the staion entry from
* the list. This needs to be used when the driver advertises the
* capability to timeout the stations.
*
* @NL80211_ATTR_MAX: highest attribute number currently defined
* @__NL80211_ATTR_AFTER_LAST: internal use
*/
@ -1442,6 +1448,8 @@ enum nl80211_attrs {
NL80211_ATTR_NOACK_MAP,
NL80211_ATTR_INACTIVITY_TIMEOUT,
/* add attributes here, update the policy in nl80211.c */
__NL80211_ATTR_AFTER_LAST,
@ -2809,10 +2817,13 @@ enum nl80211_ap_sme_features {
* TX status to the socket error queue when requested with the
* socket option.
* @NL80211_FEATURE_HT_IBSS: This driver supports IBSS with HT datarates.
* @NL80211_FEATURE_INACTIVITY_TIMER: This driver takes care of freeing up
* the connected inactive stations in AP mode.
*/
enum nl80211_feature_flags {
NL80211_FEATURE_SK_TX_STATUS = 1 << 0,
NL80211_FEATURE_HT_IBSS = 1 << 1,
NL80211_FEATURE_INACTIVITY_TIMER = 1 << 2,
};
/**

2
include/net/cfg80211.h
View File

@ -413,6 +413,7 @@ struct cfg80211_beacon_data {
* @crypto: crypto settings
* @privacy: the BSS uses privacy
* @auth_type: Authentication type (algorithm)
* @inactivity_timeout: time in seconds to determine station's inactivity.
*/
struct cfg80211_ap_settings {
struct cfg80211_beacon_data beacon;
@ -424,6 +425,7 @@ struct cfg80211_ap_settings {
struct cfg80211_crypto_settings crypto;
bool privacy;
enum nl80211_auth_type auth_type;
int inactivity_timeout;
};
/**

8
net/wireless/nl80211.c
View File

@ -204,6 +204,7 @@ static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
.len = NL80211_HT_CAPABILITY_LEN
},
[NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
[NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
};
/* policy for the key attributes */
@ -2214,6 +2215,13 @@ static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
if (err)
return err;
if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
return -EOPNOTSUPP;
params.inactivity_timeout = nla_get_u16(
info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
}
err = rdev->ops->start_ap(&rdev->wiphy, dev, &params);
if (!err)
wdev->beacon_interval = params.beacon_interval;