mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
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5fe95d1b66
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@9554 3c298f89-4303-0410-b956-a3cf2f4a3e73
209 lines
6.2 KiB
Diff
209 lines
6.2 KiB
Diff
Subject: cfg80211/nl80211: implement station attribute retrieval
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After a station is added to the kernel's structures, userspace
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has to be able to retrieve statistics about that station, especially
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whether the station was idle and how much bytes were transferred
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to and from it. This adds the necessary code to nl80211.
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Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
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---
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include/linux/nl80211.h | 28 ++++++++++++++++
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include/net/cfg80211.h | 35 ++++++++++++++++++++
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net/wireless/nl80211.c | 82 +++++++++++++++++++++++++++++++++++++++++++++++-
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3 files changed, 144 insertions(+), 1 deletion(-)
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--- everything.orig/include/linux/nl80211.h 2007-11-08 17:15:15.961529840 +0100
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+++ everything/include/linux/nl80211.h 2007-11-08 17:17:00.891547364 +0100
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@@ -157,6 +157,9 @@ enum nl80211_commands {
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* restriction (at most %NL80211_MAX_SUPP_RATES).
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* @NL80211_ATTR_STA_VLAN: interface index of VLAN interface to move station
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* to, or the AP interface the station was originally added to to.
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+ * @NL80211_ATTR_STA_STATS: statistics for a station, part of station info
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+ * given for %NL80211_CMD_GET_STATION, nested attribute containing
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+ * info as possible, see &enum nl80211_sta_stats.
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*
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* @NL80211_ATTR_MAX: highest attribute number currently defined
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* @__NL80211_ATTR_AFTER_LAST: internal use
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@@ -190,6 +193,7 @@ enum nl80211_attrs {
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NL80211_ATTR_STA_LISTEN_INTERVAL,
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NL80211_ATTR_STA_SUPPORTED_RATES,
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NL80211_ATTR_STA_VLAN,
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+ NL80211_ATTR_STA_STATS,
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/* add attributes here, update the policy in nl80211.c */
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@@ -252,4 +256,28 @@ enum nl80211_sta_flags {
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NL80211_STA_FLAG_MAX = __NL80211_STA_FLAG_AFTER_LAST - 1
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};
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+/**
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+ * enum nl80211_sta_stats - station statistics
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+ *
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+ * These attribute types are used with %NL80211_ATTR_STA_STATS
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+ * when getting information about a station.
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+ *
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+ * @__NL80211_STA_STAT_INVALID: attribute number 0 is reserved
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+ * @NL80211_STA_STAT_INACTIVE_TIME: time since last activity (u32, msecs)
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+ * @NL80211_STA_STAT_RX_BYTES: total received bytes (u32, from this station)
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+ * @NL80211_STA_STAT_TX_BYTES: total transmitted bytes (u32, to this station)
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+ * @__NL80211_STA_STAT_AFTER_LAST: internal
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+ * @NL80211_STA_STAT_MAX: highest possible station stats attribute
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+ */
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+enum nl80211_sta_stats {
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+ __NL80211_STA_STAT_INVALID,
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+ NL80211_STA_STAT_INACTIVE_TIME,
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+ NL80211_STA_STAT_RX_BYTES,
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+ NL80211_STA_STAT_TX_BYTES,
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+
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+ /* keep last */
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+ __NL80211_STA_STAT_AFTER_LAST,
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+ NL80211_STA_STAT_MAX = __NL80211_STA_STAT_AFTER_LAST - 1
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+};
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+
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#endif /* __LINUX_NL80211_H */
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--- everything.orig/include/net/cfg80211.h 2007-11-08 17:15:15.971532444 +0100
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+++ everything/include/net/cfg80211.h 2007-11-08 17:17:00.891547364 +0100
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@@ -130,6 +130,39 @@ struct station_parameters {
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u8 supported_rates_len;
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};
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+/**
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+ * enum station_stats_flags - station statistics flags
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+ *
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+ * Used by the driver to indicate which info in &struct station_stats
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+ * it has filled in during get_station().
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+ *
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+ * @STATION_STAT_INACTIVE_TIME: @inactive_time filled
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+ * @STATION_STAT_RX_BYTES: @rx_bytes filled
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+ * @STATION_STAT_TX_BYTES: @tx_bytes filled
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+ */
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+enum station_stats_flags {
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+ STATION_STAT_INACTIVE_TIME = 1<<0,
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+ STATION_STAT_RX_BYTES = 1<<1,
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+ STATION_STAT_TX_BYTES = 1<<2,
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+};
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+
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+/**
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+ * struct station_stats - station statistics
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+ *
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+ * Station information filled by driver for get_station().
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+ *
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+ * @filled: bitflag of flags from &enum station_stats_flags
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+ * @inactive_time: time since last station activity (tx/rx) in milliseconds
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+ * @rx_bytes: bytes received from this station
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+ * @tx_bytes: bytes transmitted to this station
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+ */
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+struct station_stats {
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+ u32 filled;
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+ u32 inactive_time;
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+ u32 rx_bytes;
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+ u32 tx_bytes;
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+};
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+
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/* from net/wireless.h */
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struct wiphy;
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@@ -209,6 +242,8 @@ struct cfg80211_ops {
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u8 *mac);
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int (*change_station)(struct wiphy *wiphy, struct net_device *dev,
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u8 *mac, struct station_parameters *params);
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+ int (*get_station)(struct wiphy *wiphy, struct net_device *dev,
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+ u8 *mac, struct station_stats *stats);
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};
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#endif /* __NET_CFG80211_H */
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--- everything.orig/net/wireless/nl80211.c 2007-11-08 17:15:15.981533909 +0100
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+++ everything/net/wireless/nl80211.c 2007-11-08 17:17:00.901534235 +0100
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@@ -751,9 +751,89 @@ static int parse_station_flags(struct nl
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return 0;
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}
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+static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
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+ int flags, struct net_device *dev,
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+ u8 *mac_addr, struct station_stats *stats)
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+{
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+ void *hdr;
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+ struct nlattr *statsattr;
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+
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+ hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
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+ if (!hdr)
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+ return -1;
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+
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+ NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
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+ NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
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+
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+ statsattr = nla_nest_start(msg, NL80211_ATTR_STA_STATS);
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+ if (!statsattr)
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+ goto nla_put_failure;
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+ if (stats->filled & STATION_STAT_INACTIVE_TIME)
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+ NLA_PUT_U32(msg, NL80211_STA_STAT_INACTIVE_TIME,
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+ stats->inactive_time);
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+ if (stats->filled & STATION_STAT_RX_BYTES)
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+ NLA_PUT_U32(msg, NL80211_STA_STAT_RX_BYTES,
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+ stats->rx_bytes);
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+ if (stats->filled & STATION_STAT_TX_BYTES)
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+ NLA_PUT_U32(msg, NL80211_STA_STAT_TX_BYTES,
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+ stats->tx_bytes);
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+
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+ nla_nest_end(msg, statsattr);
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+
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+ return genlmsg_end(msg, hdr);
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+
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+ nla_put_failure:
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+ return genlmsg_cancel(msg, hdr);
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+}
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+
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+
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static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
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{
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- return -EOPNOTSUPP;
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+ struct cfg80211_registered_device *drv;
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+ int err;
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+ struct net_device *dev;
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+ struct station_stats stats;
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+ struct sk_buff *msg;
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+ u8 *mac_addr = NULL;
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+
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+ memset(&stats, 0, sizeof(stats));
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+
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+ if (!info->attrs[NL80211_ATTR_MAC])
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+ return -EINVAL;
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+
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+ mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
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+
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+ err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
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+ if (err)
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+ return err;
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+
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+ if (!drv->ops->get_station) {
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+ err = -EOPNOTSUPP;
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+ goto out;
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+ }
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+
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+ rtnl_lock();
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+ err = drv->ops->get_station(&drv->wiphy, dev, mac_addr, &stats);
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+ rtnl_unlock();
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+
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+ msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
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+ if (!msg)
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+ goto out;
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+
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+ if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
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+ dev, mac_addr, &stats) < 0)
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+ goto out_free;
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+
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+ err = genlmsg_unicast(msg, info->snd_pid);
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+ goto out;
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+
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+ out_free:
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+ nlmsg_free(msg);
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+
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+ out:
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+ cfg80211_put_dev(drv);
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+ dev_put(dev);
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+ return err;
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}
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/*
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