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authorJohannes Berg <johannes@sipsolutions.net>2007-12-18 20:03:36 -0500
committerDavid S. Miller <davem@davemloft.net>2008-01-28 17:59:52 -0500
commitfd5b74dcb88cfc109d6576b22deaef6f47f82c12 (patch)
treeeebd528e684a4a127d906257b4727a6d134c85ef /net
parent5727ef1b2e797a1922f5bc239b6afb2b4cfb80bc (diff)
cfg80211/nl80211: implement station attribute retrieval
After a station is added to the kernel's structures, userspace has to be able to retrieve statistics about that station, especially whether the station was idle and how much bytes were transferred to and from it. This adds the necessary code to nl80211. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/wireless/nl80211.c82
1 files changed, 81 insertions, 1 deletions
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 431835126e88..e3a214f63f91 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -750,9 +750,89 @@ static int parse_station_flags(struct nlattr *nla, u32 *staflags)
750 return 0; 750 return 0;
751} 751}
752 752
753static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
754 int flags, struct net_device *dev,
755 u8 *mac_addr, struct station_stats *stats)
756{
757 void *hdr;
758 struct nlattr *statsattr;
759
760 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
761 if (!hdr)
762 return -1;
763
764 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
765 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
766
767 statsattr = nla_nest_start(msg, NL80211_ATTR_STA_STATS);
768 if (!statsattr)
769 goto nla_put_failure;
770 if (stats->filled & STATION_STAT_INACTIVE_TIME)
771 NLA_PUT_U32(msg, NL80211_STA_STAT_INACTIVE_TIME,
772 stats->inactive_time);
773 if (stats->filled & STATION_STAT_RX_BYTES)
774 NLA_PUT_U32(msg, NL80211_STA_STAT_RX_BYTES,
775 stats->rx_bytes);
776 if (stats->filled & STATION_STAT_TX_BYTES)
777 NLA_PUT_U32(msg, NL80211_STA_STAT_TX_BYTES,
778 stats->tx_bytes);
779
780 nla_nest_end(msg, statsattr);
781
782 return genlmsg_end(msg, hdr);
783
784 nla_put_failure:
785 return genlmsg_cancel(msg, hdr);
786}
787
788
753static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info) 789static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
754{ 790{
755 return -EOPNOTSUPP; 791 struct cfg80211_registered_device *drv;
792 int err;
793 struct net_device *dev;
794 struct station_stats stats;
795 struct sk_buff *msg;
796 u8 *mac_addr = NULL;
797
798 memset(&stats, 0, sizeof(stats));
799
800 if (!info->attrs[NL80211_ATTR_MAC])
801 return -EINVAL;
802
803 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
804
805 err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
806 if (err)
807 return err;
808
809 if (!drv->ops->get_station) {
810 err = -EOPNOTSUPP;
811 goto out;
812 }
813
814 rtnl_lock();
815 err = drv->ops->get_station(&drv->wiphy, dev, mac_addr, &stats);
816 rtnl_unlock();
817
818 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
819 if (!msg)
820 goto out;
821
822 if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
823 dev, mac_addr, &stats) < 0)
824 goto out_free;
825
826 err = genlmsg_unicast(msg, info->snd_pid);
827 goto out;
828
829 out_free:
830 nlmsg_free(msg);
831
832 out:
833 cfg80211_put_dev(drv);
834 dev_put(dev);
835 return err;
756} 836}
757 837
758/* 838/*