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cfg80211: Add nl80211 event for deletion of a station entry

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Indicate an NL80211_CMD_DEL_STATION event when a station entry in
mac80211 is deleted to match with the NL80211_CMD_NEW_STATION event
that is used when the entry was added. This is needed, e.g., to allow
user space to remove a peer from RSN IBSS Authenticator state machine
to avoid re-authentication and re-keying delays when the peer is not
reachable anymore.

Signed-off-by: Jouni Malinen <jouni.malinen@atheros.com>
Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Jouni Malinen 2011-03-23 15:29:52 +02:00 committed by John W. Linville
parent cfdc9a8bb8
commit ec15e68ba6
5 changed files with 57 additions and 0 deletions
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9
include/net/cfg80211.h
View File

@ -2666,6 +2666,15 @@ void cfg80211_remain_on_channel_expired(struct net_device *dev,
void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
struct station_info *sinfo, gfp_t gfp);
/**
* cfg80211_del_sta - notify userspace about deletion of a station
*
* @dev: the netdev
* @mac_addr: the station's address
* @gfp: allocation flags
*/
void cfg80211_del_sta(struct net_device *dev, const u8 *mac_addr, gfp_t gfp);
/**
* cfg80211_rx_mgmt - notification of received, unprocessed management frame
* @dev: network device

2
net/mac80211/sta_info.c
View File

@ -698,6 +698,8 @@ static int __must_check __sta_info_destroy(struct sta_info *sta)
#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
cancel_work_sync(&sta->drv_unblock_wk);
cfg80211_del_sta(sdata->dev, sta->sta.addr, GFP_KERNEL);
rate_control_remove_sta_debugfs(sta);
ieee80211_sta_debugfs_remove(sta);

9
net/wireless/mlme.c
View File

@ -770,6 +770,15 @@ void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
}
EXPORT_SYMBOL(cfg80211_new_sta);
void cfg80211_del_sta(struct net_device *dev, const u8 *mac_addr, gfp_t gfp)
{
struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
nl80211_send_sta_del_event(rdev, dev, mac_addr, gfp);
}
EXPORT_SYMBOL(cfg80211_del_sta);
struct cfg80211_mgmt_registration {
struct list_head list;

34
net/wireless/nl80211.c
View File

@ -5966,6 +5966,40 @@ void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
nl80211_mlme_mcgrp.id, gfp);
}
void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
struct net_device *dev, const u8 *mac_addr,
gfp_t gfp)
{
struct sk_buff *msg;
void *hdr;
msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
if (!msg)
return;
hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
if (!hdr) {
nlmsg_free(msg);
return;
}
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
if (genlmsg_end(msg, hdr) < 0) {
nlmsg_free(msg);
return;
}
genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
nl80211_mlme_mcgrp.id, gfp);
return;
nla_put_failure:
genlmsg_cancel(msg, hdr);
nlmsg_free(msg);
}
int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
struct net_device *netdev, u32 nlpid,
int freq, const u8 *buf, size_t len, gfp_t gfp)

3
net/wireless/nl80211.h
View File

@ -79,6 +79,9 @@ void nl80211_send_remain_on_channel_cancel(
void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
struct net_device *dev, const u8 *mac_addr,
struct station_info *sinfo, gfp_t gfp);
void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
struct net_device *dev, const u8 *mac_addr,
gfp_t gfp);
int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
struct net_device *netdev, u32 nlpid, int freq,