SAFE public projects git trees. - safe/jmp/linux-2.6/blob - net/wireless/nl80211.c

   1 /*
   2  * This is the new netlink-based wireless configuration interface.
   3  *
   4  * Copyright 2006, 2007 Johannes Berg <johannes@sipsolutions.net>
   5  */
   6
   7 #include <linux/if.h>
   8 #include <linux/module.h>
   9 #include <linux/err.h>
  10 #include <linux/mutex.h>
  11 #include <linux/list.h>
  12 #include <linux/if_ether.h>
  13 #include <linux/ieee80211.h>
  14 #include <linux/nl80211.h>
  15 #include <linux/rtnetlink.h>
  16 #include <linux/netlink.h>
  17 #include <net/genetlink.h>
  18 #include <net/cfg80211.h>
  19 #include "core.h"
  20 #include "nl80211.h"
  21 #include "reg.h"
  22
  23 /* the netlink family */
  24 static struct genl_family nl80211_fam = {
  25         .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
  26         .name = "nl80211",      /* have users key off the name instead */
  27         .hdrsize = 0,           /* no private header */
  28         .version = 1,           /* no particular meaning now */
  29         .maxattr = NL80211_ATTR_MAX,
  30 };
  31
  32 /* internal helper: get drv and dev */
  33 static int get_drv_dev_by_info_ifindex(struct nlattr **attrs,
  34                                        struct cfg80211_registered_device **drv,
  35                                        struct net_device **dev)
  36 {
  37         int ifindex;
  38
  39         if (!attrs[NL80211_ATTR_IFINDEX])
  40                 return -EINVAL;
  41
  42         ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  43         *dev = dev_get_by_index(&init_net, ifindex);
  44         if (!*dev)
  45                 return -ENODEV;
  46
  47         *drv = cfg80211_get_dev_from_ifindex(ifindex);
  48         if (IS_ERR(*drv)) {
  49                 dev_put(*dev);
  50                 return PTR_ERR(*drv);
  51         }
  52
  53         return 0;
  54 }
  55
  56 /* policy for the attributes */
  57 static struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] __read_mostly = {
  58         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
  59         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
  60                                       .len = BUS_ID_SIZE-1 },
  61
  62         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
  63         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
  64         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
  65
  66         [NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
  67
  68         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
  69                                     .len = WLAN_MAX_KEY_LEN },
  70         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
  71         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
  72         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
  73
  74         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
  75         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
  76         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
  77                                        .len = IEEE80211_MAX_DATA_LEN },
  78         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
  79                                        .len = IEEE80211_MAX_DATA_LEN },
  80         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
  81         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
  82         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
  83         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
  84                                                .len = NL80211_MAX_SUPP_RATES },
  85         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
  86         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
  87         [NL80211_ATTR_MNTR_FLAGS] = { .type = NLA_NESTED },
  88         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
  89                                 .len = IEEE80211_MAX_MESH_ID_LEN },
  90         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
  91
  92         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
  93         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
  94
  95         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
  96         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
  97         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
  98
  99         [NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
 100                                          .len = NL80211_HT_CAPABILITY_LEN },
 101 };
 102
 103 /* message building helper */
 104 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 105                                    int flags, u8 cmd)
 106 {
 107         /* since there is no private header just add the generic one */
 108         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 109 }
 110
 111 /* netlink command implementations */
 112
 113 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 114                               struct cfg80211_registered_device *dev)
 115 {
 116         void *hdr;
 117         struct nlattr *nl_bands, *nl_band;
 118         struct nlattr *nl_freqs, *nl_freq;
 119         struct nlattr *nl_rates, *nl_rate;
 120         struct nlattr *nl_modes;
 121         enum ieee80211_band band;
 122         struct ieee80211_channel *chan;
 123         struct ieee80211_rate *rate;
 124         int i;
 125         u16 ifmodes = dev->wiphy.interface_modes;
 126
 127         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 128         if (!hdr)
 129                 return -1;
 130
 131         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->idx);
 132         NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
 133
 134         nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES);
 135         if (!nl_modes)
 136                 goto nla_put_failure;
 137
 138         i = 0;
 139         while (ifmodes) {
 140                 if (ifmodes & 1)
 141                         NLA_PUT_FLAG(msg, i);
 142                 ifmodes >>= 1;
 143                 i++;
 144         }
 145
 146         nla_nest_end(msg, nl_modes);
 147
 148         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 149         if (!nl_bands)
 150                 goto nla_put_failure;
 151
 152         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 153                 if (!dev->wiphy.bands[band])
 154                         continue;
 155
 156                 nl_band = nla_nest_start(msg, band);
 157                 if (!nl_band)
 158                         goto nla_put_failure;
 159
 160                 /* add frequencies */
 161                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 162                 if (!nl_freqs)
 163                         goto nla_put_failure;
 164
 165                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 166                         nl_freq = nla_nest_start(msg, i);
 167                         if (!nl_freq)
 168                                 goto nla_put_failure;
 169
 170                         chan = &dev->wiphy.bands[band]->channels[i];
 171                         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 172                                     chan->center_freq);
 173
 174                         if (chan->flags & IEEE80211_CHAN_DISABLED)
 175                                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
 176                         if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
 177                                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
 178                         if (chan->flags & IEEE80211_CHAN_NO_IBSS)
 179                                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
 180                         if (chan->flags & IEEE80211_CHAN_RADAR)
 181                                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
 182
 183                         nla_nest_end(msg, nl_freq);
 184                 }
 185
 186                 nla_nest_end(msg, nl_freqs);
 187
 188                 /* add bitrates */
 189                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
 190                 if (!nl_rates)
 191                         goto nla_put_failure;
 192
 193                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
 194                         nl_rate = nla_nest_start(msg, i);
 195                         if (!nl_rate)
 196                                 goto nla_put_failure;
 197
 198                         rate = &dev->wiphy.bands[band]->bitrates[i];
 199                         NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
 200                                     rate->bitrate);
 201                         if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
 202                                 NLA_PUT_FLAG(msg,
 203                                         NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
 204
 205                         nla_nest_end(msg, nl_rate);
 206                 }
 207
 208                 nla_nest_end(msg, nl_rates);
 209
 210                 nla_nest_end(msg, nl_band);
 211         }
 212         nla_nest_end(msg, nl_bands);
 213
 214         return genlmsg_end(msg, hdr);
 215
 216  nla_put_failure:
 217         genlmsg_cancel(msg, hdr);
 218         return -EMSGSIZE;
 219 }
 220
 221 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
 222 {
 223         int idx = 0;
 224         int start = cb->args[0];
 225         struct cfg80211_registered_device *dev;
 226
 227         mutex_lock(&cfg80211_drv_mutex);
 228         list_for_each_entry(dev, &cfg80211_drv_list, list) {
 229                 if (++idx <= start)
 230                         continue;
 231                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
 232                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
 233                                        dev) < 0) {
 234                         idx--;
 235                         break;
 236                 }
 237         }
 238         mutex_unlock(&cfg80211_drv_mutex);
 239
 240         cb->args[0] = idx;
 241
 242         return skb->len;
 243 }
 244
 245 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
 246 {
 247         struct sk_buff *msg;
 248         struct cfg80211_registered_device *dev;
 249
 250         dev = cfg80211_get_dev_from_info(info);
 251         if (IS_ERR(dev))
 252                 return PTR_ERR(dev);
 253
 254         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
 255         if (!msg)
 256                 goto out_err;
 257
 258         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0)
 259                 goto out_free;
 260
 261         cfg80211_put_dev(dev);
 262
 263         return genlmsg_unicast(msg, info->snd_pid);
 264
 265  out_free:
 266         nlmsg_free(msg);
 267  out_err:
 268         cfg80211_put_dev(dev);
 269         return -ENOBUFS;
 270 }
 271
 272 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
 273 {
 274         struct cfg80211_registered_device *rdev;
 275         int result;
 276
 277         if (!info->attrs[NL80211_ATTR_WIPHY_NAME])
 278                 return -EINVAL;
 279
 280         rdev = cfg80211_get_dev_from_info(info);
 281         if (IS_ERR(rdev))
 282                 return PTR_ERR(rdev);
 283
 284         result = cfg80211_dev_rename(rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
 285
 286         cfg80211_put_dev(rdev);
 287         return result;
 288 }
 289
 290
 291 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 292                               struct net_device *dev)
 293 {
 294         void *hdr;
 295
 296         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
 297         if (!hdr)
 298                 return -1;
 299
 300         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
 301         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
 302         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
 303         return genlmsg_end(msg, hdr);
 304
 305  nla_put_failure:
 306         genlmsg_cancel(msg, hdr);
 307         return -EMSGSIZE;
 308 }
 309
 310 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
 311 {
 312         int wp_idx = 0;
 313         int if_idx = 0;
 314         int wp_start = cb->args[0];
 315         int if_start = cb->args[1];
 316         struct cfg80211_registered_device *dev;
 317         struct wireless_dev *wdev;
 318
 319         mutex_lock(&cfg80211_drv_mutex);
 320         list_for_each_entry(dev, &cfg80211_drv_list, list) {
 321                 if (wp_idx < wp_start) {
 322                         wp_idx++;
 323                         continue;
 324                 }
 325                 if_idx = 0;
 326
 327                 mutex_lock(&dev->devlist_mtx);
 328                 list_for_each_entry(wdev, &dev->netdev_list, list) {
 329                         if (if_idx < if_start) {
 330                                 if_idx++;
 331                                 continue;
 332                         }
 333                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
 334                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
 335                                                wdev->netdev) < 0) {
 336                                 mutex_unlock(&dev->devlist_mtx);
 337                                 goto out;
 338                         }
 339                         if_idx++;
 340                 }
 341                 mutex_unlock(&dev->devlist_mtx);
 342
 343                 wp_idx++;
 344         }
 345  out:
 346         mutex_unlock(&cfg80211_drv_mutex);
 347
 348         cb->args[0] = wp_idx;
 349         cb->args[1] = if_idx;
 350
 351         return skb->len;
 352 }
 353
 354 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
 355 {
 356         struct sk_buff *msg;
 357         struct cfg80211_registered_device *dev;
 358         struct net_device *netdev;
 359         int err;
 360
 361         err = get_drv_dev_by_info_ifindex(info->attrs, &dev, &netdev);
 362         if (err)
 363                 return err;
 364
 365         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
 366         if (!msg)
 367                 goto out_err;
 368
 369         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0, netdev) < 0)
 370                 goto out_free;
 371
 372         dev_put(netdev);
 373         cfg80211_put_dev(dev);
 374
 375         return genlmsg_unicast(msg, info->snd_pid);
 376
 377  out_free:
 378         nlmsg_free(msg);
 379  out_err:
 380         dev_put(netdev);
 381         cfg80211_put_dev(dev);
 382         return -ENOBUFS;
 383 }
 384
 385 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
 386         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
 387         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
 388         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
 389         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
 390         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
 391 };
 392
 393 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
 394 {
 395         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
 396         int flag;
 397
 398         *mntrflags = 0;
 399
 400         if (!nla)
 401                 return -EINVAL;
 402
 403         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
 404                              nla, mntr_flags_policy))
 405                 return -EINVAL;
 406
 407         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
 408                 if (flags[flag])
 409                         *mntrflags |= (1<<flag);
 410
 411         return 0;
 412 }
 413
 414 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
 415 {
 416         struct cfg80211_registered_device *drv;
 417         struct vif_params params;
 418         int err, ifindex;
 419         enum nl80211_iftype type;
 420         struct net_device *dev;
 421         u32 _flags, *flags = NULL;
 422
 423         memset(&params, 0, sizeof(params));
 424
 425         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
 426         if (err)
 427                 return err;
 428         ifindex = dev->ifindex;
 429         type = dev->ieee80211_ptr->iftype;
 430         dev_put(dev);
 431
 432         err = -EINVAL;
 433         if (info->attrs[NL80211_ATTR_IFTYPE]) {
 434                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
 435                 if (type > NL80211_IFTYPE_MAX)
 436                         goto unlock;
 437         }
 438
 439         if (!drv->ops->change_virtual_intf ||
 440             !(drv->wiphy.interface_modes & (1 << type))) {
 441                 err = -EOPNOTSUPP;
 442                 goto unlock;
 443         }
 444
 445         if (info->attrs[NL80211_ATTR_MESH_ID]) {
 446                 if (type != NL80211_IFTYPE_MESH_POINT) {
 447                         err = -EINVAL;
 448                         goto unlock;
 449                 }
 450                 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
 451                 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
 452         }
 453
 454         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
 455                 if (type != NL80211_IFTYPE_MONITOR) {
 456                         err = -EINVAL;
 457                         goto unlock;
 458                 }
 459                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
 460                                           &_flags);
 461                 if (!err)
 462                         flags = &_flags;
 463         }
 464         rtnl_lock();
 465         err = drv->ops->change_virtual_intf(&drv->wiphy, ifindex,
 466                                             type, flags, &params);
 467
 468         dev = __dev_get_by_index(&init_net, ifindex);
 469         WARN_ON(!dev || (!err && dev->ieee80211_ptr->iftype != type));
 470
 471         rtnl_unlock();
 472
 473  unlock:
 474         cfg80211_put_dev(drv);
 475         return err;
 476 }
 477
 478 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
 479 {
 480         struct cfg80211_registered_device *drv;
 481         struct vif_params params;
 482         int err;
 483         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
 484         u32 flags;
 485
 486         memset(&params, 0, sizeof(params));
 487
 488         if (!info->attrs[NL80211_ATTR_IFNAME])
 489                 return -EINVAL;
 490
 491         if (info->attrs[NL80211_ATTR_IFTYPE]) {
 492                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
 493                 if (type > NL80211_IFTYPE_MAX)
 494                         return -EINVAL;
 495         }
 496
 497         drv = cfg80211_get_dev_from_info(info);
 498         if (IS_ERR(drv))
 499                 return PTR_ERR(drv);
 500
 501         if (!drv->ops->add_virtual_intf ||
 502             !(drv->wiphy.interface_modes & (1 << type))) {
 503                 err = -EOPNOTSUPP;
 504                 goto unlock;
 505         }
 506
 507         if (type == NL80211_IFTYPE_MESH_POINT &&
 508             info->attrs[NL80211_ATTR_MESH_ID]) {
 509                 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
 510                 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
 511         }
 512
 513         rtnl_lock();
 514         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
 515                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
 516                                   &flags);
 517         err = drv->ops->add_virtual_intf(&drv->wiphy,
 518                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
 519                 type, err ? NULL : &flags, &params);
 520         rtnl_unlock();
 521
 522
 523  unlock:
 524         cfg80211_put_dev(drv);
 525         return err;
 526 }
 527
 528 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
 529 {
 530         struct cfg80211_registered_device *drv;
 531         int ifindex, err;
 532         struct net_device *dev;
 533
 534         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
 535         if (err)
 536                 return err;
 537         ifindex = dev->ifindex;
 538         dev_put(dev);
 539
 540         if (!drv->ops->del_virtual_intf) {
 541                 err = -EOPNOTSUPP;
 542                 goto out;
 543         }
 544
 545         rtnl_lock();
 546         err = drv->ops->del_virtual_intf(&drv->wiphy, ifindex);
 547         rtnl_unlock();
 548
 549  out:
 550         cfg80211_put_dev(drv);
 551         return err;
 552 }
 553
 554 struct get_key_cookie {
 555         struct sk_buff *msg;
 556         int error;
 557 };
 558
 559 static void get_key_callback(void *c, struct key_params *params)
 560 {
 561         struct get_key_cookie *cookie = c;
 562
 563         if (params->key)
 564                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
 565                         params->key_len, params->key);
 566
 567         if (params->seq)
 568                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
 569                         params->seq_len, params->seq);
 570
 571         if (params->cipher)
 572                 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
 573                             params->cipher);
 574
 575         return;
 576  nla_put_failure:
 577         cookie->error = 1;
 578 }
 579
 580 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
 581 {
 582         struct cfg80211_registered_device *drv;
 583         int err;
 584         struct net_device *dev;
 585         u8 key_idx = 0;
 586         u8 *mac_addr = NULL;
 587         struct get_key_cookie cookie = {
 588                 .error = 0,
 589         };
 590         void *hdr;
 591         struct sk_buff *msg;
 592
 593         if (info->attrs[NL80211_ATTR_KEY_IDX])
 594                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 595
 596         if (key_idx > 3)
 597                 return -EINVAL;
 598
 599         if (info->attrs[NL80211_ATTR_MAC])
 600                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
 601
 602         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
 603         if (err)
 604                 return err;
 605
 606         if (!drv->ops->get_key) {
 607                 err = -EOPNOTSUPP;
 608                 goto out;
 609         }
 610
 611         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
 612         if (!msg) {
 613                 err = -ENOMEM;
 614                 goto out;
 615         }
 616
 617         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
 618                              NL80211_CMD_NEW_KEY);
 619
 620         if (IS_ERR(hdr)) {
 621                 err = PTR_ERR(hdr);
 622                 goto out;
 623         }
 624
 625         cookie.msg = msg;
 626
 627         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
 628         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
 629         if (mac_addr)
 630                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
 631
 632         rtnl_lock();
 633         err = drv->ops->get_key(&drv->wiphy, dev, key_idx, mac_addr,
 634                                 &cookie, get_key_callback);
 635         rtnl_unlock();
 636
 637         if (err)
 638                 goto out;
 639
 640         if (cookie.error)
 641                 goto nla_put_failure;
 642
 643         genlmsg_end(msg, hdr);
 644         err = genlmsg_unicast(msg, info->snd_pid);
 645         goto out;
 646
 647  nla_put_failure:
 648         err = -ENOBUFS;
 649         nlmsg_free(msg);
 650  out:
 651         cfg80211_put_dev(drv);
 652         dev_put(dev);
 653         return err;
 654 }
 655
 656 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
 657 {
 658         struct cfg80211_registered_device *drv;
 659         int err;
 660         struct net_device *dev;
 661         u8 key_idx;
 662
 663         if (!info->attrs[NL80211_ATTR_KEY_IDX])
 664                 return -EINVAL;
 665
 666         key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 667
 668         if (key_idx > 3)
 669                 return -EINVAL;
 670
 671         /* currently only support setting default key */
 672         if (!info->attrs[NL80211_ATTR_KEY_DEFAULT])
 673                 return -EINVAL;
 674
 675         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
 676         if (err)
 677                 return err;
 678
 679         if (!drv->ops->set_default_key) {
 680                 err = -EOPNOTSUPP;
 681                 goto out;
 682         }
 683
 684         rtnl_lock();
 685         err = drv->ops->set_default_key(&drv->wiphy, dev, key_idx);
 686         rtnl_unlock();
 687
 688  out:
 689         cfg80211_put_dev(drv);
 690         dev_put(dev);
 691         return err;
 692 }
 693
 694 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
 695 {
 696         struct cfg80211_registered_device *drv;
 697         int err;
 698         struct net_device *dev;
 699         struct key_params params;
 700         u8 key_idx = 0;
 701         u8 *mac_addr = NULL;
 702
 703         memset(&params, 0, sizeof(params));
 704
 705         if (!info->attrs[NL80211_ATTR_KEY_CIPHER])
 706                 return -EINVAL;
 707
 708         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 709                 params.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 710                 params.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 711         }
 712
 713         if (info->attrs[NL80211_ATTR_KEY_IDX])
 714                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 715
 716         params.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 717
 718         if (info->attrs[NL80211_ATTR_MAC])
 719                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
 720
 721         if (key_idx > 3)
 722                 return -EINVAL;
 723
 724         /*
 725          * Disallow pairwise keys with non-zero index unless it's WEP
 726          * (because current deployments use pairwise WEP keys with
 727          * non-zero indizes but 802.11i clearly specifies to use zero)
 728          */
 729         if (mac_addr && key_idx &&
 730             params.cipher != WLAN_CIPHER_SUITE_WEP40 &&
 731             params.cipher != WLAN_CIPHER_SUITE_WEP104)
 732                 return -EINVAL;
 733
 734         /* TODO: add definitions for the lengths to linux/ieee80211.h */
 735         switch (params.cipher) {
 736         case WLAN_CIPHER_SUITE_WEP40:
 737                 if (params.key_len != 5)
 738                         return -EINVAL;
 739                 break;
 740         case WLAN_CIPHER_SUITE_TKIP:
 741                 if (params.key_len != 32)
 742                         return -EINVAL;
 743                 break;
 744         case WLAN_CIPHER_SUITE_CCMP:
 745                 if (params.key_len != 16)
 746                         return -EINVAL;
 747                 break;
 748         case WLAN_CIPHER_SUITE_WEP104:
 749                 if (params.key_len != 13)
 750                         return -EINVAL;
 751                 break;
 752         default:
 753                 return -EINVAL;
 754         }
 755
 756         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
 757         if (err)
 758                 return err;
 759
 760         if (!drv->ops->add_key) {
 761                 err = -EOPNOTSUPP;
 762                 goto out;
 763         }
 764
 765         rtnl_lock();
 766         err = drv->ops->add_key(&drv->wiphy, dev, key_idx, mac_addr, &params);
 767         rtnl_unlock();
 768
 769  out:
 770         cfg80211_put_dev(drv);
 771         dev_put(dev);
 772         return err;
 773 }
 774
 775 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
 776 {
 777         struct cfg80211_registered_device *drv;
 778         int err;
 779         struct net_device *dev;
 780         u8 key_idx = 0;
 781         u8 *mac_addr = NULL;
 782
 783         if (info->attrs[NL80211_ATTR_KEY_IDX])
 784                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 785
 786         if (key_idx > 3)
 787                 return -EINVAL;
 788
 789         if (info->attrs[NL80211_ATTR_MAC])
 790                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
 791
 792         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
 793         if (err)
 794                 return err;
 795
 796         if (!drv->ops->del_key) {
 797                 err = -EOPNOTSUPP;
 798                 goto out;
 799         }
 800
 801         rtnl_lock();
 802         err = drv->ops->del_key(&drv->wiphy, dev, key_idx, mac_addr);
 803         rtnl_unlock();
 804
 805  out:
 806         cfg80211_put_dev(drv);
 807         dev_put(dev);
 808         return err;
 809 }
 810
 811 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
 812 {
 813         int (*call)(struct wiphy *wiphy, struct net_device *dev,
 814                     struct beacon_parameters *info);
 815         struct cfg80211_registered_device *drv;
 816         int err;
 817         struct net_device *dev;
 818         struct beacon_parameters params;
 819         int haveinfo = 0;
 820
 821         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
 822         if (err)
 823                 return err;
 824
 825         switch (info->genlhdr->cmd) {
 826         case NL80211_CMD_NEW_BEACON:
 827                 /* these are required for NEW_BEACON */
 828                 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
 829                     !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
 830                     !info->attrs[NL80211_ATTR_BEACON_HEAD]) {
 831                         err = -EINVAL;
 832                         goto out;
 833                 }
 834
 835                 call = drv->ops->add_beacon;
 836                 break;
 837         case NL80211_CMD_SET_BEACON:
 838                 call = drv->ops->set_beacon;
 839                 break;
 840         default:
 841                 WARN_ON(1);
 842                 err = -EOPNOTSUPP;
 843                 goto out;
 844         }
 845
 846         if (!call) {
 847                 err = -EOPNOTSUPP;
 848                 goto out;
 849         }
 850
 851         memset(&params, 0, sizeof(params));
 852
 853         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
 854                 params.interval =
 855                     nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
 856                 haveinfo = 1;
 857         }
 858
 859         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
 860                 params.dtim_period =
 861                     nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
 862                 haveinfo = 1;
 863         }
 864
 865         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
 866                 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
 867                 params.head_len =
 868                     nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
 869                 haveinfo = 1;
 870         }
 871
 872         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
 873                 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
 874                 params.tail_len =
 875                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
 876                 haveinfo = 1;
 877         }
 878
 879         if (!haveinfo) {
 880                 err = -EINVAL;
 881                 goto out;
 882         }
 883
 884         rtnl_lock();
 885         err = call(&drv->wiphy, dev, &params);
 886         rtnl_unlock();
 887
 888  out:
 889         cfg80211_put_dev(drv);
 890         dev_put(dev);
 891         return err;
 892 }
 893
 894 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
 895 {
 896         struct cfg80211_registered_device *drv;
 897         int err;
 898         struct net_device *dev;
 899
 900         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
 901         if (err)
 902                 return err;
 903
 904         if (!drv->ops->del_beacon) {
 905                 err = -EOPNOTSUPP;
 906                 goto out;
 907         }
 908
 909         rtnl_lock();
 910         err = drv->ops->del_beacon(&drv->wiphy, dev);
 911         rtnl_unlock();
 912
 913  out:
 914         cfg80211_put_dev(drv);
 915         dev_put(dev);
 916         return err;
 917 }
 918
 919 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
 920         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
 921         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
 922         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
 923 };
 924
 925 static int parse_station_flags(struct nlattr *nla, u32 *staflags)
 926 {
 927         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
 928         int flag;
 929
 930         *staflags = 0;
 931
 932         if (!nla)
 933                 return 0;
 934
 935         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
 936                              nla, sta_flags_policy))
 937                 return -EINVAL;
 938
 939         *staflags = STATION_FLAG_CHANGED;
 940
 941         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
 942                 if (flags[flag])
 943                         *staflags |= (1<<flag);
 944
 945         return 0;
 946 }
 947
 948 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
 949                                 int flags, struct net_device *dev,
 950                                 u8 *mac_addr, struct station_info *sinfo)
 951 {
 952         void *hdr;
 953         struct nlattr *sinfoattr;
 954
 955         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
 956         if (!hdr)
 957                 return -1;
 958
 959         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
 960         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
 961
 962         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
 963         if (!sinfoattr)
 964                 goto nla_put_failure;
 965         if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
 966                 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
 967                             sinfo->inactive_time);
 968         if (sinfo->filled & STATION_INFO_RX_BYTES)
 969                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
 970                             sinfo->rx_bytes);
 971         if (sinfo->filled & STATION_INFO_TX_BYTES)
 972                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
 973                             sinfo->tx_bytes);
 974         if (sinfo->filled & STATION_INFO_LLID)
 975                 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
 976                             sinfo->llid);
 977         if (sinfo->filled & STATION_INFO_PLID)
 978                 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
 979                             sinfo->plid);
 980         if (sinfo->filled & STATION_INFO_PLINK_STATE)
 981                 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
 982                             sinfo->plink_state);
 983
 984         nla_nest_end(msg, sinfoattr);
 985
 986         return genlmsg_end(msg, hdr);
 987
 988  nla_put_failure:
 989         genlmsg_cancel(msg, hdr);
 990         return -EMSGSIZE;
 991 }
 992
 993 static int nl80211_dump_station(struct sk_buff *skb,
 994                                 struct netlink_callback *cb)
 995 {
 996         struct station_info sinfo;
 997         struct cfg80211_registered_device *dev;
 998         struct net_device *netdev;
 999         u8 mac_addr[ETH_ALEN];
1000         int ifidx = cb->args[0];
1001         int sta_idx = cb->args[1];
1002         int err;
1003
1004         if (!ifidx) {
1005                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1006                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
1007                                   nl80211_policy);
1008                 if (err)
1009                         return err;
1010
1011                 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
1012                         return -EINVAL;
1013
1014                 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
1015                 if (!ifidx)
1016                         return -EINVAL;
1017         }
1018
1019         netdev = dev_get_by_index(&init_net, ifidx);
1020         if (!netdev)
1021                 return -ENODEV;
1022
1023         dev = cfg80211_get_dev_from_ifindex(ifidx);
1024         if (IS_ERR(dev)) {
1025                 err = PTR_ERR(dev);
1026                 goto out_put_netdev;
1027         }
1028
1029         if (!dev->ops->dump_station) {
1030                 err = -ENOSYS;
1031                 goto out_err;
1032         }
1033
1034         rtnl_lock();
1035
1036         while (1) {
1037                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
1038                                              mac_addr, &sinfo);
1039                 if (err == -ENOENT)
1040                         break;
1041                 if (err)
1042                         goto out_err_rtnl;
1043
1044                 if (nl80211_send_station(skb,
1045                                 NETLINK_CB(cb->skb).pid,
1046                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1047                                 netdev, mac_addr,
1048                                 &sinfo) < 0)
1049                         goto out;
1050
1051                 sta_idx++;
1052         }
1053
1054
1055  out:
1056         cb->args[1] = sta_idx;
1057         err = skb->len;
1058  out_err_rtnl:
1059         rtnl_unlock();
1060  out_err:
1061         cfg80211_put_dev(dev);
1062  out_put_netdev:
1063         dev_put(netdev);
1064
1065         return err;
1066 }
1067
1068 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
1069 {
1070         struct cfg80211_registered_device *drv;
1071         int err;
1072         struct net_device *dev;
1073         struct station_info sinfo;
1074         struct sk_buff *msg;
1075         u8 *mac_addr = NULL;
1076
1077         memset(&sinfo, 0, sizeof(sinfo));
1078
1079         if (!info->attrs[NL80211_ATTR_MAC])
1080                 return -EINVAL;
1081
1082         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1083
1084         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1085         if (err)
1086                 return err;
1087
1088         if (!drv->ops->get_station) {
1089                 err = -EOPNOTSUPP;
1090                 goto out;
1091         }
1092
1093         rtnl_lock();
1094         err = drv->ops->get_station(&drv->wiphy, dev, mac_addr, &sinfo);
1095         rtnl_unlock();
1096
1097         if (err)
1098                 goto out;
1099
1100         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1101         if (!msg)
1102                 goto out;
1103
1104         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
1105                                  dev, mac_addr, &sinfo) < 0)
1106                 goto out_free;
1107
1108         err = genlmsg_unicast(msg, info->snd_pid);
1109         goto out;
1110
1111  out_free:
1112         nlmsg_free(msg);
1113
1114  out:
1115         cfg80211_put_dev(drv);
1116         dev_put(dev);
1117         return err;
1118 }
1119
1120 /*
1121  * Get vlan interface making sure it is on the right wiphy.
1122  */
1123 static int get_vlan(struct nlattr *vlanattr,
1124                     struct cfg80211_registered_device *rdev,
1125                     struct net_device **vlan)
1126 {
1127         *vlan = NULL;
1128
1129         if (vlanattr) {
1130                 *vlan = dev_get_by_index(&init_net, nla_get_u32(vlanattr));
1131                 if (!*vlan)
1132                         return -ENODEV;
1133                 if (!(*vlan)->ieee80211_ptr)
1134                         return -EINVAL;
1135                 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
1136                         return -EINVAL;
1137         }
1138         return 0;
1139 }
1140
1141 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
1142 {
1143         struct cfg80211_registered_device *drv;
1144         int err;
1145         struct net_device *dev;
1146         struct station_parameters params;
1147         u8 *mac_addr = NULL;
1148
1149         memset(&params, 0, sizeof(params));
1150
1151         params.listen_interval = -1;
1152
1153         if (info->attrs[NL80211_ATTR_STA_AID])
1154                 return -EINVAL;
1155
1156         if (!info->attrs[NL80211_ATTR_MAC])
1157                 return -EINVAL;
1158
1159         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1160
1161         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
1162                 params.supported_rates =
1163                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1164                 params.supported_rates_len =
1165                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1166         }
1167
1168         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1169                 params.listen_interval =
1170                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1171
1172         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
1173                 params.ht_capa =
1174                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
1175
1176         if (parse_station_flags(info->attrs[NL80211_ATTR_STA_FLAGS],
1177                                 &params.station_flags))
1178                 return -EINVAL;
1179
1180         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
1181                 params.plink_action =
1182                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
1183
1184         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1185         if (err)
1186                 return err;
1187
1188         err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, &params.vlan);
1189         if (err)
1190                 goto out;
1191
1192         if (!drv->ops->change_station) {
1193                 err = -EOPNOTSUPP;
1194                 goto out;
1195         }
1196
1197         rtnl_lock();
1198         err = drv->ops->change_station(&drv->wiphy, dev, mac_addr, &params);
1199         rtnl_unlock();
1200
1201  out:
1202         if (params.vlan)
1203                 dev_put(params.vlan);
1204         cfg80211_put_dev(drv);
1205         dev_put(dev);
1206         return err;
1207 }
1208
1209 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
1210 {
1211         struct cfg80211_registered_device *drv;
1212         int err;
1213         struct net_device *dev;
1214         struct station_parameters params;
1215         u8 *mac_addr = NULL;
1216
1217         memset(&params, 0, sizeof(params));
1218
1219         if (!info->attrs[NL80211_ATTR_MAC])
1220                 return -EINVAL;
1221
1222         if (!info->attrs[NL80211_ATTR_STA_AID])
1223                 return -EINVAL;
1224
1225         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1226                 return -EINVAL;
1227
1228         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
1229                 return -EINVAL;
1230
1231         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1232         params.supported_rates =
1233                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1234         params.supported_rates_len =
1235                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1236         params.listen_interval =
1237                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1238         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
1239         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
1240                 params.ht_capa =
1241                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
1242
1243         if (parse_station_flags(info->attrs[NL80211_ATTR_STA_FLAGS],
1244                                 &params.station_flags))
1245                 return -EINVAL;
1246
1247         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1248         if (err)
1249                 return err;
1250
1251         err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, &params.vlan);
1252         if (err)
1253                 goto out;
1254
1255         if (!drv->ops->add_station) {
1256                 err = -EOPNOTSUPP;
1257                 goto out;
1258         }
1259
1260         rtnl_lock();
1261         err = drv->ops->add_station(&drv->wiphy, dev, mac_addr, &params);
1262         rtnl_unlock();
1263
1264  out:
1265         if (params.vlan)
1266                 dev_put(params.vlan);
1267         cfg80211_put_dev(drv);
1268         dev_put(dev);
1269         return err;
1270 }
1271
1272 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
1273 {
1274         struct cfg80211_registered_device *drv;
1275         int err;
1276         struct net_device *dev;
1277         u8 *mac_addr = NULL;
1278
1279         if (info->attrs[NL80211_ATTR_MAC])
1280                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1281
1282         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1283         if (err)
1284                 return err;
1285
1286         if (!drv->ops->del_station) {
1287                 err = -EOPNOTSUPP;
1288                 goto out;
1289         }
1290
1291         rtnl_lock();
1292         err = drv->ops->del_station(&drv->wiphy, dev, mac_addr);
1293         rtnl_unlock();
1294
1295  out:
1296         cfg80211_put_dev(drv);
1297         dev_put(dev);
1298         return err;
1299 }
1300
1301 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
1302                                 int flags, struct net_device *dev,
1303                                 u8 *dst, u8 *next_hop,
1304                                 struct mpath_info *pinfo)
1305 {
1306         void *hdr;
1307         struct nlattr *pinfoattr;
1308
1309         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1310         if (!hdr)
1311                 return -1;
1312
1313         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1314         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
1315         NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
1316
1317         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
1318         if (!pinfoattr)
1319                 goto nla_put_failure;
1320         if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
1321                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
1322                             pinfo->frame_qlen);
1323         if (pinfo->filled & MPATH_INFO_DSN)
1324                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DSN,
1325                             pinfo->dsn);
1326         if (pinfo->filled & MPATH_INFO_METRIC)
1327                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
1328                             pinfo->metric);
1329         if (pinfo->filled & MPATH_INFO_EXPTIME)
1330                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
1331                             pinfo->exptime);
1332         if (pinfo->filled & MPATH_INFO_FLAGS)
1333                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
1334                             pinfo->flags);
1335         if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
1336                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
1337                             pinfo->discovery_timeout);
1338         if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
1339                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
1340                             pinfo->discovery_retries);
1341
1342         nla_nest_end(msg, pinfoattr);
1343
1344         return genlmsg_end(msg, hdr);
1345
1346  nla_put_failure:
1347         genlmsg_cancel(msg, hdr);
1348         return -EMSGSIZE;
1349 }
1350
1351 static int nl80211_dump_mpath(struct sk_buff *skb,
1352                               struct netlink_callback *cb)
1353 {
1354         struct mpath_info pinfo;
1355         struct cfg80211_registered_device *dev;
1356         struct net_device *netdev;
1357         u8 dst[ETH_ALEN];
1358         u8 next_hop[ETH_ALEN];
1359         int ifidx = cb->args[0];
1360         int path_idx = cb->args[1];
1361         int err;
1362
1363         if (!ifidx) {
1364                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1365                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
1366                                   nl80211_policy);
1367                 if (err)
1368                         return err;
1369
1370                 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
1371                         return -EINVAL;
1372
1373                 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
1374                 if (!ifidx)
1375                         return -EINVAL;
1376         }
1377
1378         netdev = dev_get_by_index(&init_net, ifidx);
1379         if (!netdev)
1380                 return -ENODEV;
1381
1382         dev = cfg80211_get_dev_from_ifindex(ifidx);
1383         if (IS_ERR(dev)) {
1384                 err = PTR_ERR(dev);
1385                 goto out_put_netdev;
1386         }
1387
1388         if (!dev->ops->dump_mpath) {
1389                 err = -ENOSYS;
1390                 goto out_err;
1391         }
1392
1393         rtnl_lock();
1394
1395         while (1) {
1396                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
1397                                            dst, next_hop, &pinfo);
1398                 if (err == -ENOENT)
1399                         break;
1400                 if (err)
1401                         goto out_err_rtnl;
1402
1403                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
1404                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
1405                                        netdev, dst, next_hop,
1406                                        &pinfo) < 0)
1407                         goto out;
1408
1409                 path_idx++;
1410         }
1411
1412
1413  out:
1414         cb->args[1] = path_idx;
1415         err = skb->len;
1416  out_err_rtnl:
1417         rtnl_unlock();
1418  out_err:
1419         cfg80211_put_dev(dev);
1420  out_put_netdev:
1421         dev_put(netdev);
1422
1423         return err;
1424 }
1425
1426 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
1427 {
1428         struct cfg80211_registered_device *drv;
1429         int err;
1430         struct net_device *dev;
1431         struct mpath_info pinfo;
1432         struct sk_buff *msg;
1433         u8 *dst = NULL;
1434         u8 next_hop[ETH_ALEN];
1435
1436         memset(&pinfo, 0, sizeof(pinfo));
1437
1438         if (!info->attrs[NL80211_ATTR_MAC])
1439                 return -EINVAL;
1440
1441         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1442
1443         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1444         if (err)
1445                 return err;
1446
1447         if (!drv->ops->get_mpath) {
1448                 err = -EOPNOTSUPP;
1449                 goto out;
1450         }
1451
1452         rtnl_lock();
1453         err = drv->ops->get_mpath(&drv->wiphy, dev, dst, next_hop, &pinfo);
1454         rtnl_unlock();
1455
1456         if (err)
1457                 goto out;
1458
1459         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1460         if (!msg)
1461                 goto out;
1462
1463         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
1464                                  dev, dst, next_hop, &pinfo) < 0)
1465                 goto out_free;
1466
1467         err = genlmsg_unicast(msg, info->snd_pid);
1468         goto out;
1469
1470  out_free:
1471         nlmsg_free(msg);
1472
1473  out:
1474         cfg80211_put_dev(drv);
1475         dev_put(dev);
1476         return err;
1477 }
1478
1479 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
1480 {
1481         struct cfg80211_registered_device *drv;
1482         int err;
1483         struct net_device *dev;
1484         u8 *dst = NULL;
1485         u8 *next_hop = NULL;
1486
1487         if (!info->attrs[NL80211_ATTR_MAC])
1488                 return -EINVAL;
1489
1490         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
1491                 return -EINVAL;
1492
1493         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1494         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
1495
1496         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1497         if (err)
1498                 return err;
1499
1500         if (!drv->ops->change_mpath) {
1501                 err = -EOPNOTSUPP;
1502                 goto out;
1503         }
1504
1505         rtnl_lock();
1506         err = drv->ops->change_mpath(&drv->wiphy, dev, dst, next_hop);
1507         rtnl_unlock();
1508
1509  out:
1510         cfg80211_put_dev(drv);
1511         dev_put(dev);
1512         return err;
1513 }
1514 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
1515 {
1516         struct cfg80211_registered_device *drv;
1517         int err;
1518         struct net_device *dev;
1519         u8 *dst = NULL;
1520         u8 *next_hop = NULL;
1521
1522         if (!info->attrs[NL80211_ATTR_MAC])
1523                 return -EINVAL;
1524
1525         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
1526                 return -EINVAL;
1527
1528         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1529         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
1530
1531         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1532         if (err)
1533                 return err;
1534
1535         if (!drv->ops->add_mpath) {
1536                 err = -EOPNOTSUPP;
1537                 goto out;
1538         }
1539
1540         rtnl_lock();
1541         err = drv->ops->add_mpath(&drv->wiphy, dev, dst, next_hop);
1542         rtnl_unlock();
1543
1544  out:
1545         cfg80211_put_dev(drv);
1546         dev_put(dev);
1547         return err;
1548 }
1549
1550 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
1551 {
1552         struct cfg80211_registered_device *drv;
1553         int err;
1554         struct net_device *dev;
1555         u8 *dst = NULL;
1556
1557         if (info->attrs[NL80211_ATTR_MAC])
1558                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1559
1560         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1561         if (err)
1562                 return err;
1563
1564         if (!drv->ops->del_mpath) {
1565                 err = -EOPNOTSUPP;
1566                 goto out;
1567         }
1568
1569         rtnl_lock();
1570         err = drv->ops->del_mpath(&drv->wiphy, dev, dst);
1571         rtnl_unlock();
1572
1573  out:
1574         cfg80211_put_dev(drv);
1575         dev_put(dev);
1576         return err;
1577 }
1578
1579 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
1580 {
1581         struct cfg80211_registered_device *drv;
1582         int err;
1583         struct net_device *dev;
1584         struct bss_parameters params;
1585
1586         memset(&params, 0, sizeof(params));
1587         /* default to not changing parameters */
1588         params.use_cts_prot = -1;
1589         params.use_short_preamble = -1;
1590         params.use_short_slot_time = -1;
1591
1592         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
1593                 params.use_cts_prot =
1594                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
1595         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
1596                 params.use_short_preamble =
1597                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
1598         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
1599                 params.use_short_slot_time =
1600                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
1601
1602         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1603         if (err)
1604                 return err;
1605
1606         if (!drv->ops->change_bss) {
1607                 err = -EOPNOTSUPP;
1608                 goto out;
1609         }
1610
1611         rtnl_lock();
1612         err = drv->ops->change_bss(&drv->wiphy, dev, &params);
1613         rtnl_unlock();
1614
1615  out:
1616         cfg80211_put_dev(drv);
1617         dev_put(dev);
1618         return err;
1619 }
1620
1621 static const struct nla_policy
1622         reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
1623         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
1624         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
1625         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
1626         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
1627         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
1628         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
1629 };
1630
1631 static int parse_reg_rule(struct nlattr *tb[],
1632         struct ieee80211_reg_rule *reg_rule)
1633 {
1634         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
1635         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
1636
1637         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
1638                 return -EINVAL;
1639         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
1640                 return -EINVAL;
1641         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
1642                 return -EINVAL;
1643         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
1644                 return -EINVAL;
1645         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
1646                 return -EINVAL;
1647
1648         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
1649
1650         freq_range->start_freq_khz =
1651                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
1652         freq_range->end_freq_khz =
1653                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
1654         freq_range->max_bandwidth_khz =
1655                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
1656
1657         power_rule->max_eirp =
1658                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
1659
1660         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
1661                 power_rule->max_antenna_gain =
1662                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
1663
1664         return 0;
1665 }
1666
1667 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
1668 {
1669         int r;
1670         char *data = NULL;
1671
1672         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
1673                 return -EINVAL;
1674
1675         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
1676
1677 #ifdef CONFIG_WIRELESS_OLD_REGULATORY
1678         /* We ignore world regdom requests with the old regdom setup */
1679         if (is_world_regdom(data))
1680                 return -EINVAL;
1681 #endif
1682         mutex_lock(&cfg80211_drv_mutex);
1683         r = __regulatory_hint(NULL, REGDOM_SET_BY_USER, data, NULL);
1684         mutex_unlock(&cfg80211_drv_mutex);
1685         return r;
1686 }
1687
1688 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
1689 {
1690         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
1691         struct nlattr *nl_reg_rule;
1692         char *alpha2 = NULL;
1693         int rem_reg_rules = 0, r = 0;
1694         u32 num_rules = 0, rule_idx = 0, size_of_regd;
1695         struct ieee80211_regdomain *rd = NULL;
1696
1697         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
1698                 return -EINVAL;
1699
1700         if (!info->attrs[NL80211_ATTR_REG_RULES])
1701                 return -EINVAL;
1702
1703         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
1704
1705         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
1706                         rem_reg_rules) {
1707                 num_rules++;
1708                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
1709                         goto bad_reg;
1710         }
1711
1712         if (!reg_is_valid_request(alpha2))
1713                 return -EINVAL;
1714
1715         size_of_regd = sizeof(struct ieee80211_regdomain) +
1716                 (num_rules * sizeof(struct ieee80211_reg_rule));
1717
1718         rd = kzalloc(size_of_regd, GFP_KERNEL);
1719         if (!rd)
1720                 return -ENOMEM;
1721
1722         rd->n_reg_rules = num_rules;
1723         rd->alpha2[0] = alpha2[0];
1724         rd->alpha2[1] = alpha2[1];
1725
1726         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
1727                         rem_reg_rules) {
1728                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
1729                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
1730                         reg_rule_policy);
1731                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
1732                 if (r)
1733                         goto bad_reg;
1734
1735                 rule_idx++;
1736
1737                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES)
1738                         goto bad_reg;
1739         }
1740
1741         BUG_ON(rule_idx != num_rules);
1742
1743         mutex_lock(&cfg80211_drv_mutex);
1744         r = set_regdom(rd);
1745         mutex_unlock(&cfg80211_drv_mutex);
1746         if (r)
1747                 goto bad_reg;
1748
1749         return r;
1750
1751 bad_reg:
1752         kfree(rd);
1753         return -EINVAL;
1754 }
1755
1756 static struct genl_ops nl80211_ops[] = {
1757         {
1758                 .cmd = NL80211_CMD_GET_WIPHY,
1759                 .doit = nl80211_get_wiphy,
1760                 .dumpit = nl80211_dump_wiphy,
1761                 .policy = nl80211_policy,
1762                 /* can be retrieved by unprivileged users */
1763         },
1764         {
1765                 .cmd = NL80211_CMD_SET_WIPHY,
1766                 .doit = nl80211_set_wiphy,
1767                 .policy = nl80211_policy,
1768                 .flags = GENL_ADMIN_PERM,
1769         },
1770         {
1771                 .cmd = NL80211_CMD_GET_INTERFACE,
1772                 .doit = nl80211_get_interface,
1773                 .dumpit = nl80211_dump_interface,
1774                 .policy = nl80211_policy,
1775                 /* can be retrieved by unprivileged users */
1776         },
1777         {
1778                 .cmd = NL80211_CMD_SET_INTERFACE,
1779                 .doit = nl80211_set_interface,
1780                 .policy = nl80211_policy,
1781                 .flags = GENL_ADMIN_PERM,
1782         },
1783         {
1784                 .cmd = NL80211_CMD_NEW_INTERFACE,
1785                 .doit = nl80211_new_interface,
1786                 .policy = nl80211_policy,
1787                 .flags = GENL_ADMIN_PERM,
1788         },
1789         {
1790                 .cmd = NL80211_CMD_DEL_INTERFACE,
1791                 .doit = nl80211_del_interface,
1792                 .policy = nl80211_policy,
1793                 .flags = GENL_ADMIN_PERM,
1794         },
1795         {
1796                 .cmd = NL80211_CMD_GET_KEY,
1797                 .doit = nl80211_get_key,
1798                 .policy = nl80211_policy,
1799                 .flags = GENL_ADMIN_PERM,
1800         },
1801         {
1802                 .cmd = NL80211_CMD_SET_KEY,
1803                 .doit = nl80211_set_key,
1804                 .policy = nl80211_policy,
1805                 .flags = GENL_ADMIN_PERM,
1806         },
1807         {
1808                 .cmd = NL80211_CMD_NEW_KEY,
1809                 .doit = nl80211_new_key,
1810                 .policy = nl80211_policy,
1811                 .flags = GENL_ADMIN_PERM,
1812         },
1813         {
1814                 .cmd = NL80211_CMD_DEL_KEY,
1815                 .doit = nl80211_del_key,
1816                 .policy = nl80211_policy,
1817                 .flags = GENL_ADMIN_PERM,
1818         },
1819         {
1820                 .cmd = NL80211_CMD_SET_BEACON,
1821                 .policy = nl80211_policy,
1822                 .flags = GENL_ADMIN_PERM,
1823                 .doit = nl80211_addset_beacon,
1824         },
1825         {
1826                 .cmd = NL80211_CMD_NEW_BEACON,
1827                 .policy = nl80211_policy,
1828                 .flags = GENL_ADMIN_PERM,
1829                 .doit = nl80211_addset_beacon,
1830         },
1831         {
1832                 .cmd = NL80211_CMD_DEL_BEACON,
1833                 .policy = nl80211_policy,
1834                 .flags = GENL_ADMIN_PERM,
1835                 .doit = nl80211_del_beacon,
1836         },
1837         {
1838                 .cmd = NL80211_CMD_GET_STATION,
1839                 .doit = nl80211_get_station,
1840                 .dumpit = nl80211_dump_station,
1841                 .policy = nl80211_policy,
1842                 .flags = GENL_ADMIN_PERM,
1843         },
1844         {
1845                 .cmd = NL80211_CMD_SET_STATION,
1846                 .doit = nl80211_set_station,
1847                 .policy = nl80211_policy,
1848                 .flags = GENL_ADMIN_PERM,
1849         },
1850         {
1851                 .cmd = NL80211_CMD_NEW_STATION,
1852                 .doit = nl80211_new_station,
1853                 .policy = nl80211_policy,
1854                 .flags = GENL_ADMIN_PERM,
1855         },
1856         {
1857                 .cmd = NL80211_CMD_DEL_STATION,
1858                 .doit = nl80211_del_station,
1859                 .policy = nl80211_policy,
1860                 .flags = GENL_ADMIN_PERM,
1861         },
1862         {
1863                 .cmd = NL80211_CMD_GET_MPATH,
1864                 .doit = nl80211_get_mpath,
1865                 .dumpit = nl80211_dump_mpath,
1866                 .policy = nl80211_policy,
1867                 .flags = GENL_ADMIN_PERM,
1868         },
1869         {
1870                 .cmd = NL80211_CMD_SET_MPATH,
1871                 .doit = nl80211_set_mpath,
1872                 .policy = nl80211_policy,
1873                 .flags = GENL_ADMIN_PERM,
1874         },
1875         {
1876                 .cmd = NL80211_CMD_NEW_MPATH,
1877                 .doit = nl80211_new_mpath,
1878                 .policy = nl80211_policy,
1879                 .flags = GENL_ADMIN_PERM,
1880         },
1881         {
1882                 .cmd = NL80211_CMD_DEL_MPATH,
1883                 .doit = nl80211_del_mpath,
1884                 .policy = nl80211_policy,
1885                 .flags = GENL_ADMIN_PERM,
1886         },
1887         {
1888                 .cmd = NL80211_CMD_SET_BSS,
1889                 .doit = nl80211_set_bss,
1890                 .policy = nl80211_policy,
1891                 .flags = GENL_ADMIN_PERM,
1892         },
1893         {
1894                 .cmd = NL80211_CMD_SET_REG,
1895                 .doit = nl80211_set_reg,
1896                 .policy = nl80211_policy,
1897                 .flags = GENL_ADMIN_PERM,
1898         },
1899         {
1900                 .cmd = NL80211_CMD_REQ_SET_REG,
1901                 .doit = nl80211_req_set_reg,
1902                 .policy = nl80211_policy,
1903                 .flags = GENL_ADMIN_PERM,
1904         },
1905 };
1906
1907 /* multicast groups */
1908 static struct genl_multicast_group nl80211_config_mcgrp = {
1909         .name = "config",
1910 };
1911
1912 /* notification functions */
1913
1914 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
1915 {
1916         struct sk_buff *msg;
1917
1918         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1919         if (!msg)
1920                 return;
1921
1922         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
1923                 nlmsg_free(msg);
1924                 return;
1925         }
1926
1927         genlmsg_multicast(msg, 0, nl80211_config_mcgrp.id, GFP_KERNEL);
1928 }
1929
1930 /* initialisation/exit functions */
1931
1932 int nl80211_init(void)
1933 {
1934         int err, i;
1935
1936         err = genl_register_family(&nl80211_fam);
1937         if (err)
1938                 return err;
1939
1940         for (i = 0; i < ARRAY_SIZE(nl80211_ops); i++) {
1941                 err = genl_register_ops(&nl80211_fam, &nl80211_ops[i]);
1942                 if (err)
1943                         goto err_out;
1944         }
1945
1946         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
1947         if (err)
1948                 goto err_out;
1949
1950         return 0;
1951  err_out:
1952         genl_unregister_family(&nl80211_fam);
1953         return err;
1954 }
1955
1956 void nl80211_exit(void)
1957 {
1958         genl_unregister_family(&nl80211_fam);
1959 }