package/mac80211/patches/020-nl80211-beacon-parameters.patch

   1 Subject: cfg80211/nl80211: add beacon settings
   2
   3 This adds the necessary API to cfg80211/nl80211 to allow
   4 changing beaconing settings.
   5
   6 Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
   7
   8 ---
   9  include/linux/nl80211.h |   24 ++++++++
  10  include/net/cfg80211.h  |   33 +++++++++++
  11  net/wireless/nl80211.c  |  133 ++++++++++++++++++++++++++++++++++++++++++++++++
  12  3 files changed, 190 insertions(+)
  13
  14 --- everything.orig/include/net/cfg80211.h      2007-11-08 11:50:57.412840007 +0100
  15 +++ everything/include/net/cfg80211.h   2007-11-08 16:50:38.421522842 +0100
  16 @@ -69,6 +69,26 @@ struct key_params {
  17         u32 cipher;
  18  };
  19
  20 +/**
  21 + * struct beacon_parameters - beacon parameters
  22 + *
  23 + * Used to configure the beacon for an interface.
  24 + *
  25 + * @head: head portion of beacon (before TIM IE)
  26 + *     or %NULL if not changed
  27 + * @tail: tail portion of beacon (after TIM IE)
  28 + *     or %NULL if not changed
  29 + * @interval: beacon interval or zero if not changed
  30 + * @dtim_period: DTIM period or zero if not changed
  31 + * @head_len: length of @head
  32 + * @tail_len: length of @tail
  33 + */
  34 +struct beacon_parameters {
  35 +       u8 *head, *tail;
  36 +       int interval, dtim_period;
  37 +       int head_len, tail_len;
  38 +};
  39 +
  40  /* from net/wireless.h */
  41  struct wiphy;
  42
  43 @@ -103,6 +123,13 @@ struct wiphy;
  44   *     and @key_index
  45   *
  46   * @set_default_key: set the default key on an interface
  47 + *
  48 + * @add_beacon: Add a beacon with given parameters, @head, @interval
  49 + *     and @dtim_period will be valid, @tail is optional.
  50 + * @set_beacon: Change the beacon parameters for an access point mode
  51 + *     interface. This should reject the call when no beacon has been
  52 + *     configured.
  53 + * @del_beacon: Remove beacon configuration and stop sending the beacon.
  54   */
  55  struct cfg80211_ops {
  56         int     (*add_virtual_intf)(struct wiphy *wiphy, char *name,
  57 @@ -122,6 +149,12 @@ struct cfg80211_ops {
  58         int     (*set_default_key)(struct wiphy *wiphy,
  59                                    struct net_device *netdev,
  60                                    u8 key_index);
  61 +
  62 +       int     (*add_beacon)(struct wiphy *wiphy, struct net_device *dev,
  63 +                             struct beacon_parameters *info);
  64 +       int     (*set_beacon)(struct wiphy *wiphy, struct net_device *dev,
  65 +                             struct beacon_parameters *info);
  66 +       int     (*del_beacon)(struct wiphy *wiphy, struct net_device *dev);
  67  };
  68
  69  #endif /* __NET_CFG80211_H */
  70 --- everything.orig/include/linux/nl80211.h     2007-11-08 11:50:57.362839952 +0100
  71 +++ everything/include/linux/nl80211.h  2007-11-08 16:56:32.431522732 +0100
  72 @@ -47,6 +47,15 @@
  73   * @NL80211_CMD_DEL_KEY: delete a key identified by %NL80211_ATTR_KEY_IDX
  74   *     or %NL80211_ATTR_MAC.
  75   *
  76 + * @NL80211_CMD_GET_BEACON: retrieve beacon information (returned in a
  77 + *     %NL80222_CMD_NEW_BEACON message)
  78 + * @NL80211_CMD_SET_BEACON: set the beacon on an access point interface
  79 + *     using the %NL80211_ATTR_BEACON_INTERVAL, %NL80211_ATTR_DTIM_PERIOD,
  80 + *     %NL80211_BEACON_HEAD and %NL80211_BEACON_TAIL attributes.
  81 + * @NL80211_CMD_NEW_BEACON: add a new beacon to an access point interface,
  82 + *     parameters are like for %NL80211_CMD_SET_BEACON.
  83 + * @NL80211_CMD_DEL_BEACON: remove the beacon, stop sending it
  84 + *
  85   * @NL80211_CMD_MAX: highest used command number
  86   * @__NL80211_CMD_AFTER_LAST: internal use
  87   */
  88 @@ -69,6 +78,11 @@ enum nl80211_commands {
  89         NL80211_CMD_NEW_KEY,
  90         NL80211_CMD_DEL_KEY,
  91
  92 +       NL80211_CMD_GET_BEACON,
  93 +       NL80211_CMD_SET_BEACON,
  94 +       NL80211_CMD_NEW_BEACON,
  95 +       NL80211_CMD_DEL_BEACON,
  96 +
  97         /* add commands here */
  98
  99         /* used to define NL80211_CMD_MAX below */
 100 @@ -101,6 +115,11 @@ enum nl80211_commands {
 101   * @NL80211_ATTR_KEY_SEQ: transmit key sequence number (IV/PN) for TKIP and
 102   *     CCMP keys, each six bytes in little endian
 103   *
 104 + * @NL80211_ATTR_BEACON_INTERVAL: beacon interval in TU
 105 + * @NL80211_ATTR_DTIM_PERIOD: DTIM period for beaconing
 106 + * @NL80211_ATTR_BEACON_HEAD: portion of the beacon before the TIM IE
 107 + * @NL80211_ATTR_BEACON_TAIL: portion of the beacon after the TIM IE
 108 + *
 109   * @NL80211_ATTR_MAX: highest attribute number currently defined
 110   * @__NL80211_ATTR_AFTER_LAST: internal use
 111   */
 112 @@ -123,6 +142,11 @@ enum nl80211_attrs {
 113         NL80211_ATTR_KEY_SEQ,
 114         NL80211_ATTR_KEY_DEFAULT,
 115
 116 +       NL80211_ATTR_BEACON_INTERVAL,
 117 +       NL80211_ATTR_DTIM_PERIOD,
 118 +       NL80211_ATTR_BEACON_HEAD,
 119 +       NL80211_ATTR_BEACON_TAIL,
 120 +
 121         /* add attributes here, update the policy in nl80211.c */
 122
 123         __NL80211_ATTR_AFTER_LAST,
 124 --- everything.orig/net/wireless/nl80211.c      2007-11-08 11:50:57.382836589 +0100
 125 +++ everything/net/wireless/nl80211.c   2007-11-08 16:58:36.711524524 +0100
 126 @@ -69,6 +69,13 @@ static struct nla_policy nl80211_policy[
 127         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 128         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 129         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 130 +
 131 +       [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 132 +       [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 133 +       [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 134 +                                      .len = IEEE80211_MAX_DATA_LEN },
 135 +       [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 136 +                                      .len = IEEE80211_MAX_DATA_LEN },
 137  };
 138
 139  /* message building helper */
 140 @@ -600,6 +607,114 @@ static int nl80211_del_key(struct sk_buf
 141         return err;
 142  }
 143
 144 +static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
 145 +{
 146 +        int (*call)(struct wiphy *wiphy, struct net_device *dev,
 147 +                   struct beacon_parameters *info);
 148 +       struct cfg80211_registered_device *drv;
 149 +       int err;
 150 +       struct net_device *dev;
 151 +       struct beacon_parameters params;
 152 +       int haveinfo = 0;
 153 +
 154 +       err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
 155 +       if (err)
 156 +               return err;
 157 +
 158 +       switch (info->genlhdr->cmd) {
 159 +       case NL80211_CMD_NEW_BEACON:
 160 +               /* these are required for NEW_BEACON */
 161 +               if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
 162 +                   !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
 163 +                   !info->attrs[NL80211_ATTR_BEACON_HEAD]) {
 164 +                       err = -EINVAL;
 165 +                       goto out;
 166 +               }
 167 +
 168 +               call = drv->ops->add_beacon;
 169 +               break;
 170 +       case NL80211_CMD_SET_BEACON:
 171 +               call = drv->ops->set_beacon;
 172 +               break;
 173 +       default:
 174 +               WARN_ON(1);
 175 +               err = -EOPNOTSUPP;
 176 +               goto out;
 177 +       }
 178 +
 179 +       if (!call) {
 180 +               err = -EOPNOTSUPP;
 181 +               goto out;
 182 +       }
 183 +
 184 +       memset(&params, 0, sizeof(params));
 185 +
 186 +       if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
 187 +               params.interval =
 188 +                   nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
 189 +               haveinfo = 1;
 190 +       }
 191 +
 192 +       if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
 193 +               params.dtim_period =
 194 +                   nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
 195 +               haveinfo = 1;
 196 +       }
 197 +
 198 +       if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
 199 +               params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
 200 +               params.head_len =
 201 +                   nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
 202 +               haveinfo = 1;
 203 +       }
 204 +
 205 +       if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
 206 +               params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
 207 +               params.tail_len =
 208 +                   nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
 209 +               haveinfo = 1;
 210 +       }
 211 +
 212 +       if (!haveinfo) {
 213 +               err = -EINVAL;
 214 +               goto out;
 215 +       }
 216 +
 217 +       rtnl_lock();
 218 +       err = call(&drv->wiphy, dev, &params);
 219 +       rtnl_unlock();
 220 +
 221 + out:
 222 +       cfg80211_put_dev(drv);
 223 +       dev_put(dev);
 224 +       return err;
 225 +}
 226 +
 227 +static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
 228 +{
 229 +       struct cfg80211_registered_device *drv;
 230 +       int err;
 231 +       struct net_device *dev;
 232 +
 233 +       err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
 234 +       if (err)
 235 +               return err;
 236 +
 237 +       if (!drv->ops->del_beacon) {
 238 +               err = -EOPNOTSUPP;
 239 +               goto out;
 240 +       }
 241 +
 242 +       rtnl_lock();
 243 +       err = drv->ops->del_beacon(&drv->wiphy, dev);
 244 +       rtnl_unlock();
 245 +
 246 + out:
 247 +       cfg80211_put_dev(drv);
 248 +       dev_put(dev);
 249 +       return err;
 250 +}
 251 +
 252  static struct genl_ops nl80211_ops[] = {
 253         {
 254                 .cmd = NL80211_CMD_GET_WIPHY,
 255 @@ -663,6 +778,24 @@ static struct genl_ops nl80211_ops[] = {
 256                 .policy = nl80211_policy,
 257                 .flags = GENL_ADMIN_PERM,
 258         },
 259 +       {
 260 +               .cmd = NL80211_CMD_SET_BEACON,
 261 +               .policy = nl80211_policy,
 262 +               .flags = GENL_ADMIN_PERM,
 263 +               .doit = nl80211_addset_beacon,
 264 +       },
 265 +       {
 266 +               .cmd = NL80211_CMD_NEW_BEACON,
 267 +               .policy = nl80211_policy,
 268 +               .flags = GENL_ADMIN_PERM,
 269 +               .doit = nl80211_addset_beacon,
 270 +       },
 271 +       {
 272 +               .cmd = NL80211_CMD_DEL_BEACON,
 273 +               .policy = nl80211_policy,
 274 +               .flags = GENL_ADMIN_PERM,
 275 +               .doit = nl80211_del_beacon,
 276 +       },
 277  };
 278
 279  /* multicast groups */