package/mac80211/patches/024-nl80211-get-sta.patch

   1 Subject: cfg80211/nl80211: implement station attribute retrieval
   2
   3 After a station is added to the kernel's structures, userspace
   4 has to be able to retrieve statistics about that station, especially
   5 whether the station was idle and how much bytes were transferred
   6 to and from it. This adds the necessary code to nl80211.
   7
   8 Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
   9
  10 ---
  11  include/linux/nl80211.h |   28 ++++++++++++++++
  12  include/net/cfg80211.h  |   35 ++++++++++++++++++++
  13  net/wireless/nl80211.c  |   82 +++++++++++++++++++++++++++++++++++++++++++++++-
  14  3 files changed, 144 insertions(+), 1 deletion(-)
  15
  16 --- everything.orig/include/linux/nl80211.h     2007-11-08 17:15:15.961529840 +0100
  17 +++ everything/include/linux/nl80211.h  2007-11-08 17:17:00.891547364 +0100
  18 @@ -157,6 +157,9 @@ enum nl80211_commands {
  19   *     restriction (at most %NL80211_MAX_SUPP_RATES).
  20   * @NL80211_ATTR_STA_VLAN: interface index of VLAN interface to move station
  21   *     to, or the AP interface the station was originally added to to.
  22 + * @NL80211_ATTR_STA_STATS: statistics for a station, part of station info
  23 + *     given for %NL80211_CMD_GET_STATION, nested attribute containing
  24 + *     info as possible, see &enum nl80211_sta_stats.
  25   *
  26   * @NL80211_ATTR_MAX: highest attribute number currently defined
  27   * @__NL80211_ATTR_AFTER_LAST: internal use
  28 @@ -190,6 +193,7 @@ enum nl80211_attrs {
  29         NL80211_ATTR_STA_LISTEN_INTERVAL,
  30         NL80211_ATTR_STA_SUPPORTED_RATES,
  31         NL80211_ATTR_STA_VLAN,
  32 +       NL80211_ATTR_STA_STATS,
  33
  34         /* add attributes here, update the policy in nl80211.c */
  35
  36 @@ -252,4 +256,28 @@ enum nl80211_sta_flags {
  37         NL80211_STA_FLAG_MAX = __NL80211_STA_FLAG_AFTER_LAST - 1
  38  };
  39
  40 +/**
  41 + * enum nl80211_sta_stats - station statistics
  42 + *
  43 + * These attribute types are used with %NL80211_ATTR_STA_STATS
  44 + * when getting information about a station.
  45 + *
  46 + * @__NL80211_STA_STAT_INVALID: attribute number 0 is reserved
  47 + * @NL80211_STA_STAT_INACTIVE_TIME: time since last activity (u32, msecs)
  48 + * @NL80211_STA_STAT_RX_BYTES: total received bytes (u32, from this station)
  49 + * @NL80211_STA_STAT_TX_BYTES: total transmitted bytes (u32, to this station)
  50 + * @__NL80211_STA_STAT_AFTER_LAST: internal
  51 + * @NL80211_STA_STAT_MAX: highest possible station stats attribute
  52 + */
  53 +enum nl80211_sta_stats {
  54 +       __NL80211_STA_STAT_INVALID,
  55 +       NL80211_STA_STAT_INACTIVE_TIME,
  56 +       NL80211_STA_STAT_RX_BYTES,
  57 +       NL80211_STA_STAT_TX_BYTES,
  58 +
  59 +       /* keep last */
  60 +       __NL80211_STA_STAT_AFTER_LAST,
  61 +       NL80211_STA_STAT_MAX = __NL80211_STA_STAT_AFTER_LAST - 1
  62 +};
  63 +
  64  #endif /* __LINUX_NL80211_H */
  65 --- everything.orig/include/net/cfg80211.h      2007-11-08 17:15:15.971532444 +0100
  66 +++ everything/include/net/cfg80211.h   2007-11-08 17:17:00.891547364 +0100
  67 @@ -130,6 +130,39 @@ struct station_parameters {
  68         u8 supported_rates_len;
  69  };
  70
  71 +/**
  72 + * enum station_stats_flags - station statistics flags
  73 + *
  74 + * Used by the driver to indicate which info in &struct station_stats
  75 + * it has filled in during get_station().
  76 + *
  77 + * @STATION_STAT_INACTIVE_TIME: @inactive_time filled
  78 + * @STATION_STAT_RX_BYTES: @rx_bytes filled
  79 + * @STATION_STAT_TX_BYTES: @tx_bytes filled
  80 + */
  81 +enum station_stats_flags {
  82 +       STATION_STAT_INACTIVE_TIME      = 1<<0,
  83 +       STATION_STAT_RX_BYTES           = 1<<1,
  84 +       STATION_STAT_TX_BYTES           = 1<<2,
  85 +};
  86 +
  87 +/**
  88 + * struct station_stats - station statistics
  89 + *
  90 + * Station information filled by driver for get_station().
  91 + *
  92 + * @filled: bitflag of flags from &enum station_stats_flags
  93 + * @inactive_time: time since last station activity (tx/rx) in milliseconds
  94 + * @rx_bytes: bytes received from this station
  95 + * @tx_bytes: bytes transmitted to this station
  96 + */
  97 +struct station_stats {
  98 +       u32 filled;
  99 +       u32 inactive_time;
 100 +       u32 rx_bytes;
 101 +       u32 tx_bytes;
 102 +};
 103 +
 104  /* from net/wireless.h */
 105  struct wiphy;
 106
 107 @@ -209,6 +242,8 @@ struct cfg80211_ops {
 108                                u8 *mac);
 109         int     (*change_station)(struct wiphy *wiphy, struct net_device *dev,
 110                                   u8 *mac, struct station_parameters *params);
 111 +       int     (*get_station)(struct wiphy *wiphy, struct net_device *dev,
 112 +                              u8 *mac, struct station_stats *stats);
 113  };
 114
 115  #endif /* __NET_CFG80211_H */
 116 --- everything.orig/net/wireless/nl80211.c      2007-11-08 17:15:15.981533909 +0100
 117 +++ everything/net/wireless/nl80211.c   2007-11-08 17:17:00.901534235 +0100
 118 @@ -751,9 +751,89 @@ static int parse_station_flags(struct nl
 119         return 0;
 120  }
 121
 122 +static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
 123 +                               int flags, struct net_device *dev,
 124 +                               u8 *mac_addr, struct station_stats *stats)
 125 +{
 126 +       void *hdr;
 127 +       struct nlattr *statsattr;
 128 +
 129 +       hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
 130 +       if (!hdr)
 131 +               return -1;
 132 +
 133 +       NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
 134 +       NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
 135 +
 136 +       statsattr = nla_nest_start(msg, NL80211_ATTR_STA_STATS);
 137 +       if (!statsattr)
 138 +               goto nla_put_failure;
 139 +       if (stats->filled & STATION_STAT_INACTIVE_TIME)
 140 +               NLA_PUT_U32(msg, NL80211_STA_STAT_INACTIVE_TIME,
 141 +                           stats->inactive_time);
 142 +       if (stats->filled & STATION_STAT_RX_BYTES)
 143 +               NLA_PUT_U32(msg, NL80211_STA_STAT_RX_BYTES,
 144 +                           stats->rx_bytes);
 145 +       if (stats->filled & STATION_STAT_TX_BYTES)
 146 +               NLA_PUT_U32(msg, NL80211_STA_STAT_TX_BYTES,
 147 +                           stats->tx_bytes);
 148 +
 149 +       nla_nest_end(msg, statsattr);
 150 +
 151 +       return genlmsg_end(msg, hdr);
 152 +
 153 + nla_put_failure:
 154 +       return genlmsg_cancel(msg, hdr);
 155 +}
 156 +
 157 +
 158  static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
 159  {
 160 -       return -EOPNOTSUPP;
 161 +       struct cfg80211_registered_device *drv;
 162 +       int err;
 163 +       struct net_device *dev;
 164 +       struct station_stats stats;
 165 +       struct sk_buff *msg;
 166 +       u8 *mac_addr = NULL;
 167 +
 168 +       memset(&stats, 0, sizeof(stats));
 169 +
 170 +       if (!info->attrs[NL80211_ATTR_MAC])
 171 +               return -EINVAL;
 172 +
 173 +       mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
 174 +
 175 +       err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
 176 +       if (err)
 177 +               return err;
 178 +
 179 +       if (!drv->ops->get_station) {
 180 +               err = -EOPNOTSUPP;
 181 +               goto out;
 182 +       }
 183 +
 184 +       rtnl_lock();
 185 +       err = drv->ops->get_station(&drv->wiphy, dev, mac_addr, &stats);
 186 +       rtnl_unlock();
 187 +
 188 +       msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
 189 +       if (!msg)
 190 +               goto out;
 191 +
 192 +       if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
 193 +                                dev, mac_addr, &stats) < 0)
 194 +               goto out_free;
 195 +
 196 +       err = genlmsg_unicast(msg, info->snd_pid);
 197 +       goto out;
 198 +
 199 + out_free:
 200 +       nlmsg_free(msg);
 201 +
 202 + out:
 203 +       cfg80211_put_dev(drv);
 204 +       dev_put(dev);
 205 +       return err;
 206  }
 207
 208  /*