package/mac80211/patches/022-nl80211-sta.patch

   1 Subject: cfg80211/nl80211: station handling
   2
   3 This patch adds station handling to cfg80211/nl80211.
   4
   5 Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
   6
   7 ---
   8  include/linux/nl80211.h |   68 +++++++++++++
   9  include/net/cfg80211.h  |   54 ++++++++++
  10  net/wireless/nl80211.c  |  236 ++++++++++++++++++++++++++++++++++++++++++++++++
  11  3 files changed, 358 insertions(+)
  12
  13 --- everything.orig/include/linux/nl80211.h     2007-11-08 16:56:32.431522732 +0100
  14 +++ everything/include/linux/nl80211.h  2007-11-08 17:15:15.961529840 +0100
  15 @@ -7,6 +7,18 @@
  16   */
  17
  18  /**
  19 + * DOC: Station handling
  20 + *
  21 + * Stations are added per interface, but a special case exists with VLAN
  22 + * interfaces. When a station is bound to an AP interface, it may be moved
  23 + * into a VLAN identified by a VLAN interface index (%NL80211_ATTR_STA_VLAN).
  24 + * The station is still assumed to belong to the AP interface it was added
  25 + * to.
  26 + *
  27 + * TODO: need more info?
  28 + */
  29 +
  30 +/**
  31   * enum nl80211_commands - supported nl80211 commands
  32   *
  33   * @NL80211_CMD_UNSPEC: unspecified command to catch errors
  34 @@ -56,6 +68,16 @@
  35   *     parameters are like for %NL80211_CMD_SET_BEACON.
  36   * @NL80211_CMD_DEL_BEACON: remove the beacon, stop sending it
  37   *
  38 + * @NL80211_CMD_GET_STATION: Get station attributes for station identified by
  39 + *     %NL80211_ATTR_MAC on the interface identified by %NL80211_ATTR_IFINDEX.
  40 + * @NL80211_CMD_SET_STATION: Set station attributes for station identified by
  41 + *     %NL80211_ATTR_MAC on the interface identified by %NL80211_ATTR_IFINDEX.
  42 + * @NL80211_CMD_NEW_STATION: Add a station with given attributes to the
  43 + *     the interface identified by %NL80211_ATTR_IFINDEX.
  44 + * @NL80211_CMD_DEL_STATION: Remove a station identified by %NL80211_ATTR_MAC
  45 + *     or, if no MAC address given, all stations, on the interface identified
  46 + *     by %NL80211_ATTR_IFINDEX.
  47 + *
  48   * @NL80211_CMD_MAX: highest used command number
  49   * @__NL80211_CMD_AFTER_LAST: internal use
  50   */
  51 @@ -83,6 +105,11 @@ enum nl80211_commands {
  52         NL80211_CMD_NEW_BEACON,
  53         NL80211_CMD_DEL_BEACON,
  54
  55 +       NL80211_CMD_GET_STATION,
  56 +       NL80211_CMD_SET_STATION,
  57 +       NL80211_CMD_NEW_STATION,
  58 +       NL80211_CMD_DEL_STATION,
  59 +
  60         /* add commands here */
  61
  62         /* used to define NL80211_CMD_MAX below */
  63 @@ -120,6 +147,17 @@ enum nl80211_commands {
  64   * @NL80211_ATTR_BEACON_HEAD: portion of the beacon before the TIM IE
  65   * @NL80211_ATTR_BEACON_TAIL: portion of the beacon after the TIM IE
  66   *
  67 + * @NL80211_ATTR_STA_AID: Association ID for the station (u16)
  68 + * @NL80211_ATTR_STA_FLAGS: flags, nested element with NLA_FLAG attributes of
  69 + *     &enum nl80211_sta_flags.
  70 + * @NL80211_ATTR_STA_LISTEN_INTERVAL: listen interval as defined by
  71 + *     IEEE 802.11 7.3.1.6 (u16).
  72 + * @NL80211_ATTR_STA_SUPPORTED_RATES: supported rates, array of supported
  73 + *     rates as defined by IEEE 802.11 7.3.2.2 but without the length
  74 + *     restriction (at most %NL80211_MAX_SUPP_RATES).
  75 + * @NL80211_ATTR_STA_VLAN: interface index of VLAN interface to move station
  76 + *     to, or the AP interface the station was originally added to to.
  77 + *
  78   * @NL80211_ATTR_MAX: highest attribute number currently defined
  79   * @__NL80211_ATTR_AFTER_LAST: internal use
  80   */
  81 @@ -147,12 +185,20 @@ enum nl80211_attrs {
  82         NL80211_ATTR_BEACON_HEAD,
  83         NL80211_ATTR_BEACON_TAIL,
  84
  85 +       NL80211_ATTR_STA_AID,
  86 +       NL80211_ATTR_STA_FLAGS,
  87 +       NL80211_ATTR_STA_LISTEN_INTERVAL,
  88 +       NL80211_ATTR_STA_SUPPORTED_RATES,
  89 +       NL80211_ATTR_STA_VLAN,
  90 +
  91         /* add attributes here, update the policy in nl80211.c */
  92
  93         __NL80211_ATTR_AFTER_LAST,
  94         NL80211_ATTR_MAX = __NL80211_ATTR_AFTER_LAST - 1
  95  };
  96
  97 +#define NL80211_MAX_SUPP_RATES 32
  98 +
  99  /**
 100   * enum nl80211_iftype - (virtual) interface types
 101   *
 102 @@ -184,4 +230,26 @@ enum nl80211_iftype {
 103         NL80211_IFTYPE_MAX = __NL80211_IFTYPE_AFTER_LAST - 1
 104  };
 105
 106 +/**
 107 + * enum nl80211_sta_flags - station flags
 108 + *
 109 + * Station flags. When a station is added to an AP interface, it is
 110 + * assumed to be already associated (and hence authenticated.)
 111 + *
 112 + * @NL80211_STA_FLAG_AUTHORIZED: station is authorized (802.1X)
 113 + * @NL80211_STA_FLAG_SHORT_PREAMBLE: station is capable of receiving frames
 114 + *     with short barker preamble
 115 + * @NL80211_STA_FLAG_WME: station is WME/QoS capable
 116 + */
 117 +enum nl80211_sta_flags {
 118 +       __NL80211_STA_FLAG_INVALID,
 119 +       NL80211_STA_FLAG_AUTHORIZED,
 120 +       NL80211_STA_FLAG_SHORT_PREAMBLE,
 121 +       NL80211_STA_FLAG_WME,
 122 +
 123 +       /* keep last */
 124 +       __NL80211_STA_FLAG_AFTER_LAST,
 125 +       NL80211_STA_FLAG_MAX = __NL80211_STA_FLAG_AFTER_LAST - 1
 126 +};
 127 +
 128  #endif /* __LINUX_NL80211_H */
 129 --- everything.orig/include/net/cfg80211.h      2007-11-08 16:50:38.421522842 +0100
 130 +++ everything/include/net/cfg80211.h   2007-11-08 17:15:15.971532444 +0100
 131 @@ -89,6 +89,47 @@ struct beacon_parameters {
 132         int head_len, tail_len;
 133  };
 134
 135 +/**
 136 + * enum station_flags - station flags
 137 + *
 138 + * Station capability flags. Note that these must be the bits
 139 + * according to the nl80211 flags.
 140 + *
 141 + * @STATION_FLAG_CHANGED: station flags were changed
 142 + * @STATION_FLAG_AUTHORIZED: station is authorized to send frames (802.1X)
 143 + * @STATION_FLAG_SHORT_PREAMBLE: station is capable of receiving frames
 144 + *     with short preambles
 145 + * @STATION_FLAG_WME: station is WME/QoS capable
 146 + */
 147 +enum station_flags {
 148 +       STATION_FLAG_CHANGED            = 1<<0,
 149 +       STATION_FLAG_AUTHORIZED         = 1<<NL80211_STA_FLAG_AUTHORIZED,
 150 +       STATION_FLAG_SHORT_PREAMBLE     = 1<<NL80211_STA_FLAG_SHORT_PREAMBLE,
 151 +       STATION_FLAG_WME                = 1<<NL80211_STA_FLAG_WME,
 152 +};
 153 +
 154 +/**
 155 + * struct station_parameters - station parameters
 156 + *
 157 + * Used to change and create a new station.
 158 + *
 159 + * @vlan: vlan interface station should belong to
 160 + * @supported_rates: supported rates in IEEE 802.11 format
 161 + *     (or NULL for no change)
 162 + * @supported_rates_len: number of supported rates
 163 + * @station_flags: station flags (see &enum station_flags)
 164 + * @listen_interval: listen interval or -1 for no change
 165 + * @aid: AID or zero for no change
 166 + */
 167 +struct station_parameters {
 168 +       u8 *supported_rates;
 169 +       struct net_device *vlan;
 170 +       u32 station_flags;
 171 +       int listen_interval;
 172 +       u16 aid;
 173 +       u8 supported_rates_len;
 174 +};
 175 +
 176  /* from net/wireless.h */
 177  struct wiphy;
 178
 179 @@ -130,6 +171,12 @@ struct wiphy;
 180   *     interface. This should reject the call when no beacon has been
 181   *     configured.
 182   * @del_beacon: Remove beacon configuration and stop sending the beacon.
 183 + *
 184 + * @add_station: Add a new station.
 185 + *
 186 + * @del_station: Remove a station; @mac may be NULL to remove all stations.
 187 + *
 188 + * @change_station: Modify a given station.
 189   */
 190  struct cfg80211_ops {
 191         int     (*add_virtual_intf)(struct wiphy *wiphy, char *name,
 192 @@ -155,6 +202,13 @@ struct cfg80211_ops {
 193         int     (*set_beacon)(struct wiphy *wiphy, struct net_device *dev,
 194                               struct beacon_parameters *info);
 195         int     (*del_beacon)(struct wiphy *wiphy, struct net_device *dev);
 196 +
 197 +       int     (*add_station)(struct wiphy *wiphy, struct net_device *dev,
 198 +                              u8 *mac, struct station_parameters *params);
 199 +       int     (*del_station)(struct wiphy *wiphy, struct net_device *dev,
 200 +                              u8 *mac);
 201 +       int     (*change_station)(struct wiphy *wiphy, struct net_device *dev,
 202 +                                 u8 *mac, struct station_parameters *params);
 203  };
 204
 205  #endif /* __NET_CFG80211_H */
 206 --- everything.orig/net/wireless/nl80211.c      2007-11-08 16:58:36.711524524 +0100
 207 +++ everything/net/wireless/nl80211.c   2007-11-08 17:15:15.981533909 +0100
 208 @@ -76,6 +76,12 @@ static struct nla_policy nl80211_policy[
 209                                        .len = IEEE80211_MAX_DATA_LEN },
 210         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 211                                        .len = IEEE80211_MAX_DATA_LEN },
 212 +       [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 213 +       [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 214 +       [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 215 +       [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 216 +                                              .len = NL80211_MAX_SUPP_RATES },
 217 +       [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 218  };
 219
 220  /* message building helper */
 221 @@ -715,6 +721,211 @@ static int nl80211_del_beacon(struct sk_
 222         return err;
 223  }
 224
 225 +static
 226 +struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] __read_mostly = {
 227 +       [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
 228 +       [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
 229 +       [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
 230 +};
 231 +
 232 +static int parse_station_flags(struct nlattr *nla, u32 *staflags)
 233 +{
 234 +       struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
 235 +       int flag;
 236 +
 237 +       *staflags = 0;
 238 +
 239 +       if (!nla)
 240 +               return 0;
 241 +
 242 +       if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
 243 +                            nla, sta_flags_policy))
 244 +               return -EINVAL;
 245 +
 246 +       *staflags = STATION_FLAG_CHANGED;
 247 +
 248 +       for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
 249 +               if (flags[flag])
 250 +                       *staflags |= (1<<flag);
 251 +
 252 +       return 0;
 253 +}
 254 +
 255 +static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
 256 +{
 257 +       return -EOPNOTSUPP;
 258 +}
 259 +
 260 +/*
 261 + * Get vlan interface making sure it is on the right wiphy.
 262 + */
 263 +static int get_vlan(struct nlattr *vlanattr,
 264 +                   struct cfg80211_registered_device *rdev,
 265 +                   struct net_device **vlan)
 266 +{
 267 +       *vlan = NULL;
 268 +
 269 +       if (vlanattr) {
 270 +               *vlan = dev_get_by_index(nla_get_u32(vlanattr));
 271 +               if (!*vlan)
 272 +                       return -ENODEV;
 273 +               if (!(*vlan)->ieee80211_ptr)
 274 +                       return -EINVAL;
 275 +               if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
 276 +                       return -EINVAL;
 277 +       }
 278 +       return 0;
 279 +}
 280 +
 281 +static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
 282 +{
 283 +       struct cfg80211_registered_device *drv;
 284 +       int err;
 285 +       struct net_device *dev;
 286 +       struct station_parameters params;
 287 +       u8 *mac_addr = NULL;
 288 +
 289 +       memset(&params, 0, sizeof(params));
 290 +
 291 +       params.listen_interval = -1;
 292 +
 293 +       if (info->attrs[NL80211_ATTR_STA_AID])
 294 +               return -EINVAL;
 295 +
 296 +       if (!info->attrs[NL80211_ATTR_MAC])
 297 +               return -EINVAL;
 298 +
 299 +       mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
 300 +
 301 +       if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
 302 +               params.supported_rates =
 303 +                       nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
 304 +               params.supported_rates_len =
 305 +                       nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
 306 +       }
 307 +
 308 +       if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
 309 +               params.listen_interval =
 310 +                   nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
 311 +
 312 +       if (parse_station_flags(info->attrs[NL80211_ATTR_STA_FLAGS],
 313 +                               &params.station_flags))
 314 +               return -EINVAL;
 315 +
 316 +       err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
 317 +       if (err)
 318 +               return err;
 319 +
 320 +       err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, &params.vlan);
 321 +       if (err)
 322 +               goto out;
 323 +
 324 +       if (!drv->ops->change_station) {
 325 +               err = -EOPNOTSUPP;
 326 +               goto out;
 327 +       }
 328 +
 329 +       rtnl_lock();
 330 +       err = drv->ops->change_station(&drv->wiphy, dev, mac_addr, &params);
 331 +       rtnl_unlock();
 332 +
 333 + out:
 334 +       if (params.vlan)
 335 +               dev_put(params.vlan);
 336 +       cfg80211_put_dev(drv);
 337 +       dev_put(dev);
 338 +       return err;
 339 +}
 340 +
 341 +static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
 342 +{
 343 +       struct cfg80211_registered_device *drv;
 344 +       int err;
 345 +       struct net_device *dev;
 346 +       struct station_parameters params;
 347 +       u8 *mac_addr = NULL;
 348 +
 349 +       memset(&params, 0, sizeof(params));
 350 +
 351 +       if (!info->attrs[NL80211_ATTR_MAC])
 352 +               return -EINVAL;
 353 +
 354 +       if (!info->attrs[NL80211_ATTR_STA_AID])
 355 +               return -EINVAL;
 356 +
 357 +       if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
 358 +               return -EINVAL;
 359 +
 360 +       if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
 361 +               return -EINVAL;
 362 +
 363 +       mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
 364 +       params.supported_rates =
 365 +               nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
 366 +       params.supported_rates_len =
 367 +               nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
 368 +       params.listen_interval =
 369 +               nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
 370 +       params.listen_interval = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
 371 +
 372 +       if (parse_station_flags(info->attrs[NL80211_ATTR_STA_FLAGS],
 373 +                               &params.station_flags))
 374 +               return -EINVAL;
 375 +
 376 +       err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
 377 +       if (err)
 378 +               return err;
 379 +
 380 +       err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, &params.vlan);
 381 +       if (err)
 382 +               goto out;
 383 +
 384 +       if (!drv->ops->add_station) {
 385 +               err = -EOPNOTSUPP;
 386 +               goto out;
 387 +       }
 388 +
 389 +       rtnl_lock();
 390 +       err = drv->ops->add_station(&drv->wiphy, dev, mac_addr, &params);
 391 +       rtnl_unlock();
 392 +
 393 + out:
 394 +       if (params.vlan)
 395 +               dev_put(params.vlan);
 396 +       cfg80211_put_dev(drv);
 397 +       dev_put(dev);
 398 +       return err;
 399 +}
 400 +
 401 +static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
 402 +{
 403 +       struct cfg80211_registered_device *drv;
 404 +       int err;
 405 +       struct net_device *dev;
 406 +       u8 *mac_addr = NULL;
 407 +
 408 +       if (info->attrs[NL80211_ATTR_MAC])
 409 +               mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
 410 +
 411 +       err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
 412 +       if (err)
 413 +               return err;
 414 +
 415 +       if (!drv->ops->del_station) {
 416 +               err = -EOPNOTSUPP;
 417 +               goto out;
 418 +       }
 419 +
 420 +       rtnl_lock();
 421 +       err = drv->ops->del_station(&drv->wiphy, dev, mac_addr);
 422 +       rtnl_unlock();
 423 +
 424 + out:
 425 +       cfg80211_put_dev(drv);
 426 +       dev_put(dev);
 427 +       return err;
 428 +}
 429 +
 430  static struct genl_ops nl80211_ops[] = {
 431         {
 432                 .cmd = NL80211_CMD_GET_WIPHY,
 433 @@ -796,6 +1007,31 @@ static struct genl_ops nl80211_ops[] = {
 434                 .flags = GENL_ADMIN_PERM,
 435                 .doit = nl80211_del_beacon,
 436         },
 437 +       {
 438 +               .cmd = NL80211_CMD_GET_STATION,
 439 +               .doit = nl80211_get_station,
 440 +               /* TODO: implement dumpit */
 441 +               .policy = nl80211_policy,
 442 +               .flags = GENL_ADMIN_PERM,
 443 +       },
 444 +       {
 445 +               .cmd = NL80211_CMD_SET_STATION,
 446 +               .doit = nl80211_set_station,
 447 +               .policy = nl80211_policy,
 448 +               .flags = GENL_ADMIN_PERM,
 449 +       },
 450 +       {
 451 +               .cmd = NL80211_CMD_NEW_STATION,
 452 +               .doit = nl80211_new_station,
 453 +               .policy = nl80211_policy,
 454 +               .flags = GENL_ADMIN_PERM,
 455 +       },
 456 +       {
 457 +               .cmd = NL80211_CMD_DEL_STATION,
 458 +               .doit = nl80211_del_station,
 459 +               .policy = nl80211_policy,
 460 +               .flags = GENL_ADMIN_PERM,
 461 +       },
 462  };
 463
 464  /* multicast groups */