[B.A.T.M.A.N.] [PATCHv3 4/4] cfg80211: implement cfg80211_get_station cfg80211 API

Antonio Quartulli
2014-05-17T16:41:46Z

Implement and export the new cfg80211_get_station() API.
This utility can be used by other kernel modules to obtain
detailed information about a given wireless station.

It will be in particular useful to batman-adv which will
implement a wireless rate based metric.

Signed-off-by: Antonio Quartulli <antonio@open-mesh.com>
---
include/net/cfg80211.h | 13 +++++++++++++
net/wireless/util.c | 18 ++++++++++++++++++
2 files changed, 31 insertions(+)

diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 394189e..5917919 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1075,6 +1075,19 @@ struct station_info {
};

/**
+ * cfg80211_get_station - retrieve information about a given station
+ * @dev: the device where the station is supposed to be connected to
+ * @mac_addr: the mac address of the station of interest
+ * @sinfo: pointer to the structure to fill with the information
+ *
+ * Returns 0 on success and sinfo is filled with the available information
+ * otherwise returns a negative error code and the content of sinfo has to be
+ * considered undefined.
+ */
+int cfg80211_get_station(struct net_device *dev, u8 *mac_addr,
+ struct station_info *sinfo);
+
+/**
* enum monitor_flags - monitor flags
*
* Monitor interface configuration flags. Note that these must be the bits
diff --git a/net/wireless/util.c b/net/wireless/util.c
index 8c61d5c..6380e55 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -1545,6 +1545,24 @@ unsigned int ieee80211_get_num_supported_channels(struct wiphy *wiphy)
}
EXPORT_SYMBOL(ieee80211_get_num_supported_channels);

+int cfg80211_get_station(struct net_device *dev, u8 *mac_addr,
+ struct station_info *sinfo)
+{
+ struct cfg80211_registered_device *rdev;
+ struct wireless_dev *wdev;
+
+ wdev = dev->ieee80211_ptr;
+ if (!wdev)
+ return -EOPNOTSUPP;
+
+ rdev = wiphy_to_rdev(wdev->wiphy);
+ if (!rdev->ops->get_station)
+ return -EOPNOTSUPP;
+
+ return rdev_get_station(rdev, dev, mac_addr, sinfo);
+}
+EXPORT_SYMBOL(cfg80211_get_station);
+
/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
/* Ethernet-II snap header (RFC1042 for most EtherTypes) */
const unsigned char rfc1042_header[] __aligned(2) =
--
1.8.5.5