net/mac80211/wext.c

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005-2006, Devicescape Software, Inc.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  */
   9
  10 #include <linux/module.h>
  11 #include <linux/init.h>
  12 #include <linux/netdevice.h>
  13 #include <linux/types.h>
  14 #include <linux/slab.h>
  15 #include <linux/skbuff.h>
  16 #include <linux/etherdevice.h>
  17 #include <linux/if_arp.h>
  18 #include <linux/wireless.h>
  19 #include <net/iw_handler.h>
  20 #include <asm/uaccess.h>
  21
  22 #include <net/mac80211.h>
  23 #include "ieee80211_i.h"
  24 #include "led.h"
  25 #include "rate.h"
  26 #include "wpa.h"
  27 #include "aes_ccm.h"
  28
  29
  30 static int ieee80211_set_encryption(struct net_device *dev, u8 *sta_addr,
  31                                     int idx, int alg, int remove,
  32                                     int set_tx_key, const u8 *_key,
  33                                     size_t key_len)
  34 {
  35         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
  36         struct sta_info *sta;
  37         struct ieee80211_key *key;
  38         struct ieee80211_sub_if_data *sdata;
  39         int err;
  40
  41         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
  42
  43         if (idx < 0 || idx >= NUM_DEFAULT_KEYS) {
  44                 printk(KERN_DEBUG "%s: set_encrypt - invalid idx=%d\n",
  45                        dev->name, idx);
  46                 return -EINVAL;
  47         }
  48
  49         if (remove) {
  50                 rcu_read_lock();
  51
  52                 err = 0;
  53
  54                 if (is_broadcast_ether_addr(sta_addr)) {
  55                         key = sdata->keys[idx];
  56                 } else {
  57                         sta = sta_info_get(local, sta_addr);
  58                         if (!sta) {
  59                                 err = -ENOENT;
  60                                 goto out_unlock;
  61                         }
  62                         key = sta->key;
  63                 }
  64
  65                 ieee80211_key_free(key);
  66         } else {
  67                 key = ieee80211_key_alloc(alg, idx, key_len, _key);
  68                 if (!key)
  69                         return -ENOMEM;
  70
  71                 sta = NULL;
  72                 err = 0;
  73
  74                 rcu_read_lock();
  75
  76                 if (!is_broadcast_ether_addr(sta_addr)) {
  77                         set_tx_key = 0;
  78                         /*
  79                          * According to the standard, the key index of a
  80                          * pairwise key must be zero. However, some AP are
  81                          * broken when it comes to WEP key indices, so we
  82                          * work around this.
  83                          */
  84                         if (idx != 0 && alg != ALG_WEP) {
  85                                 ieee80211_key_free(key);
  86                                 err = -EINVAL;
  87                                 goto out_unlock;
  88                         }
  89
  90                         sta = sta_info_get(local, sta_addr);
  91                         if (!sta) {
  92                                 ieee80211_key_free(key);
  93                                 err = -ENOENT;
  94                                 goto out_unlock;
  95                         }
  96                 }
  97
  98                 ieee80211_key_link(key, sdata, sta);
  99
 100                 if (set_tx_key || (!sta && !sdata->default_key && key))
 101                         ieee80211_set_default_key(sdata, idx);
 102         }
 103
 104  out_unlock:
 105         rcu_read_unlock();
 106
 107         return err;
 108 }
 109
 110 static int ieee80211_ioctl_siwgenie(struct net_device *dev,
 111                                     struct iw_request_info *info,
 112                                     struct iw_point *data, char *extra)
 113 {
 114         struct ieee80211_sub_if_data *sdata;
 115
 116         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 117
 118         if (sdata->flags & IEEE80211_SDATA_USERSPACE_MLME)
 119                 return -EOPNOTSUPP;
 120
 121         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
 122             sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
 123                 int ret = ieee80211_sta_set_extra_ie(dev, extra, data->length);
 124                 if (ret)
 125                         return ret;
 126                 sdata->u.sta.flags &= ~IEEE80211_STA_AUTO_BSSID_SEL;
 127                 ieee80211_sta_req_auth(dev, &sdata->u.sta);
 128                 return 0;
 129         }
 130
 131         return -EOPNOTSUPP;
 132 }
 133
 134 static int ieee80211_ioctl_giwname(struct net_device *dev,
 135                                    struct iw_request_info *info,
 136                                    char *name, char *extra)
 137 {
 138         strcpy(name, "IEEE 802.11");
 139
 140         return 0;
 141 }
 142
 143
 144 static int ieee80211_ioctl_giwrange(struct net_device *dev,
 145                                  struct iw_request_info *info,
 146                                  struct iw_point *data, char *extra)
 147 {
 148         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 149         struct iw_range *range = (struct iw_range *) extra;
 150         enum ieee80211_band band;
 151         int c = 0;
 152
 153         data->length = sizeof(struct iw_range);
 154         memset(range, 0, sizeof(struct iw_range));
 155
 156         range->we_version_compiled = WIRELESS_EXT;
 157         range->we_version_source = 21;
 158         range->retry_capa = IW_RETRY_LIMIT;
 159         range->retry_flags = IW_RETRY_LIMIT;
 160         range->min_retry = 0;
 161         range->max_retry = 255;
 162         range->min_rts = 0;
 163         range->max_rts = 2347;
 164         range->min_frag = 256;
 165         range->max_frag = 2346;
 166
 167         range->encoding_size[0] = 5;
 168         range->encoding_size[1] = 13;
 169         range->num_encoding_sizes = 2;
 170         range->max_encoding_tokens = NUM_DEFAULT_KEYS;
 171
 172         range->max_qual.qual = local->hw.max_signal;
 173         range->max_qual.level = local->hw.max_rssi;
 174         range->max_qual.noise = local->hw.max_noise;
 175         range->max_qual.updated = local->wstats_flags;
 176
 177         range->avg_qual.qual = local->hw.max_signal/2;
 178         range->avg_qual.level = 0;
 179         range->avg_qual.noise = 0;
 180         range->avg_qual.updated = local->wstats_flags;
 181
 182         range->enc_capa = IW_ENC_CAPA_WPA | IW_ENC_CAPA_WPA2 |
 183                           IW_ENC_CAPA_CIPHER_TKIP | IW_ENC_CAPA_CIPHER_CCMP;
 184
 185
 186         for (band = 0; band < IEEE80211_NUM_BANDS; band ++) {
 187                 int i;
 188                 struct ieee80211_supported_band *sband;
 189
 190                 sband = local->hw.wiphy->bands[band];
 191
 192                 if (!sband)
 193                         continue;
 194
 195                 for (i = 0; i < sband->n_channels && c < IW_MAX_FREQUENCIES; i++) {
 196                         struct ieee80211_channel *chan = &sband->channels[i];
 197
 198                         if (!(chan->flags & IEEE80211_CHAN_DISABLED)) {
 199                                 range->freq[c].i =
 200                                         ieee80211_frequency_to_channel(
 201                                                 chan->center_freq);
 202                                 range->freq[c].m = chan->center_freq;
 203                                 range->freq[c].e = 6;
 204                                 c++;
 205                         }
 206                 }
 207         }
 208         range->num_channels = c;
 209         range->num_frequency = c;
 210
 211         IW_EVENT_CAPA_SET_KERNEL(range->event_capa);
 212         IW_EVENT_CAPA_SET(range->event_capa, SIOCGIWTHRSPY);
 213         IW_EVENT_CAPA_SET(range->event_capa, SIOCGIWAP);
 214         IW_EVENT_CAPA_SET(range->event_capa, SIOCGIWSCAN);
 215
 216         range->scan_capa |= IW_SCAN_CAPA_ESSID;
 217
 218         return 0;
 219 }
 220
 221
 222 static int ieee80211_ioctl_siwmode(struct net_device *dev,
 223                                    struct iw_request_info *info,
 224                                    __u32 *mode, char *extra)
 225 {
 226         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 227         int type;
 228
 229         if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN)
 230                 return -EOPNOTSUPP;
 231
 232         switch (*mode) {
 233         case IW_MODE_INFRA:
 234                 type = IEEE80211_IF_TYPE_STA;
 235                 break;
 236         case IW_MODE_ADHOC:
 237                 type = IEEE80211_IF_TYPE_IBSS;
 238                 break;
 239         case IW_MODE_REPEAT:
 240                 type = IEEE80211_IF_TYPE_WDS;
 241                 break;
 242         case IW_MODE_MONITOR:
 243                 type = IEEE80211_IF_TYPE_MNTR;
 244                 break;
 245         default:
 246                 return -EINVAL;
 247         }
 248
 249         if (type == sdata->vif.type)
 250                 return 0;
 251         if (netif_running(dev))
 252                 return -EBUSY;
 253
 254         ieee80211_if_reinit(dev);
 255         ieee80211_if_set_type(dev, type);
 256
 257         return 0;
 258 }
 259
 260
 261 static int ieee80211_ioctl_giwmode(struct net_device *dev,
 262                                    struct iw_request_info *info,
 263                                    __u32 *mode, char *extra)
 264 {
 265         struct ieee80211_sub_if_data *sdata;
 266
 267         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 268         switch (sdata->vif.type) {
 269         case IEEE80211_IF_TYPE_AP:
 270                 *mode = IW_MODE_MASTER;
 271                 break;
 272         case IEEE80211_IF_TYPE_STA:
 273                 *mode = IW_MODE_INFRA;
 274                 break;
 275         case IEEE80211_IF_TYPE_IBSS:
 276                 *mode = IW_MODE_ADHOC;
 277                 break;
 278         case IEEE80211_IF_TYPE_MNTR:
 279                 *mode = IW_MODE_MONITOR;
 280                 break;
 281         case IEEE80211_IF_TYPE_WDS:
 282                 *mode = IW_MODE_REPEAT;
 283                 break;
 284         case IEEE80211_IF_TYPE_VLAN:
 285                 *mode = IW_MODE_SECOND;         /* FIXME */
 286                 break;
 287         default:
 288                 *mode = IW_MODE_AUTO;
 289                 break;
 290         }
 291         return 0;
 292 }
 293
 294 int ieee80211_set_freq(struct ieee80211_local *local, int freqMHz)
 295 {
 296         int ret = -EINVAL;
 297         struct ieee80211_channel *chan;
 298
 299         chan = ieee80211_get_channel(local->hw.wiphy, freqMHz);
 300
 301         if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) {
 302                 local->oper_channel = chan;
 303
 304                 if (local->sta_sw_scanning || local->sta_hw_scanning)
 305                         ret = 0;
 306                 else
 307                         ret = ieee80211_hw_config(local);
 308
 309                 rate_control_clear(local);
 310         }
 311
 312         return ret;
 313 }
 314
 315 static int ieee80211_ioctl_siwfreq(struct net_device *dev,
 316                                    struct iw_request_info *info,
 317                                    struct iw_freq *freq, char *extra)
 318 {
 319         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 320         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 321
 322         if (sdata->vif.type == IEEE80211_IF_TYPE_STA)
 323                 sdata->u.sta.flags &= ~IEEE80211_STA_AUTO_CHANNEL_SEL;
 324
 325         /* freq->e == 0: freq->m = channel; otherwise freq = m * 10^e */
 326         if (freq->e == 0) {
 327                 if (freq->m < 0) {
 328                         if (sdata->vif.type == IEEE80211_IF_TYPE_STA)
 329                                 sdata->u.sta.flags |=
 330                                         IEEE80211_STA_AUTO_CHANNEL_SEL;
 331                         return 0;
 332                 } else
 333                         return ieee80211_set_freq(local,
 334                                 ieee80211_channel_to_frequency(freq->m));
 335         } else {
 336                 int i, div = 1000000;
 337                 for (i = 0; i < freq->e; i++)
 338                         div /= 10;
 339                 if (div > 0)
 340                         return ieee80211_set_freq(local, freq->m / div);
 341                 else
 342                         return -EINVAL;
 343         }
 344 }
 345
 346
 347 static int ieee80211_ioctl_giwfreq(struct net_device *dev,
 348                                    struct iw_request_info *info,
 349                                    struct iw_freq *freq, char *extra)
 350 {
 351         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 352
 353         freq->m = local->hw.conf.channel->center_freq;
 354         freq->e = 6;
 355
 356         return 0;
 357 }
 358
 359
 360 static int ieee80211_ioctl_siwessid(struct net_device *dev,
 361                                     struct iw_request_info *info,
 362                                     struct iw_point *data, char *ssid)
 363 {
 364         struct ieee80211_sub_if_data *sdata;
 365         size_t len = data->length;
 366
 367         /* iwconfig uses nul termination in SSID.. */
 368         if (len > 0 && ssid[len - 1] == '\0')
 369                 len--;
 370
 371         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 372         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
 373             sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
 374                 int ret;
 375                 if (sdata->flags & IEEE80211_SDATA_USERSPACE_MLME) {
 376                         if (len > IEEE80211_MAX_SSID_LEN)
 377                                 return -EINVAL;
 378                         memcpy(sdata->u.sta.ssid, ssid, len);
 379                         sdata->u.sta.ssid_len = len;
 380                         return 0;
 381                 }
 382                 if (data->flags)
 383                         sdata->u.sta.flags &= ~IEEE80211_STA_AUTO_SSID_SEL;
 384                 else
 385                         sdata->u.sta.flags |= IEEE80211_STA_AUTO_SSID_SEL;
 386                 ret = ieee80211_sta_set_ssid(dev, ssid, len);
 387                 if (ret)
 388                         return ret;
 389                 ieee80211_sta_req_auth(dev, &sdata->u.sta);
 390                 return 0;
 391         }
 392
 393         if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
 394                 memcpy(sdata->u.ap.ssid, ssid, len);
 395                 memset(sdata->u.ap.ssid + len, 0,
 396                        IEEE80211_MAX_SSID_LEN - len);
 397                 sdata->u.ap.ssid_len = len;
 398                 return ieee80211_if_config(dev);
 399         }
 400         return -EOPNOTSUPP;
 401 }
 402
 403
 404 static int ieee80211_ioctl_giwessid(struct net_device *dev,
 405                                     struct iw_request_info *info,
 406                                     struct iw_point *data, char *ssid)
 407 {
 408         size_t len;
 409
 410         struct ieee80211_sub_if_data *sdata;
 411         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 412         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
 413             sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
 414                 int res = ieee80211_sta_get_ssid(dev, ssid, &len);
 415                 if (res == 0) {
 416                         data->length = len;
 417                         data->flags = 1;
 418                 } else
 419                         data->flags = 0;
 420                 return res;
 421         }
 422
 423         if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
 424                 len = sdata->u.ap.ssid_len;
 425                 if (len > IW_ESSID_MAX_SIZE)
 426                         len = IW_ESSID_MAX_SIZE;
 427                 memcpy(ssid, sdata->u.ap.ssid, len);
 428                 data->length = len;
 429                 data->flags = 1;
 430                 return 0;
 431         }
 432         return -EOPNOTSUPP;
 433 }
 434
 435
 436 static int ieee80211_ioctl_siwap(struct net_device *dev,
 437                                  struct iw_request_info *info,
 438                                  struct sockaddr *ap_addr, char *extra)
 439 {
 440         struct ieee80211_sub_if_data *sdata;
 441
 442         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 443         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
 444             sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
 445                 int ret;
 446                 if (sdata->flags & IEEE80211_SDATA_USERSPACE_MLME) {
 447                         memcpy(sdata->u.sta.bssid, (u8 *) &ap_addr->sa_data,
 448                                ETH_ALEN);
 449                         return 0;
 450                 }
 451                 if (is_zero_ether_addr((u8 *) &ap_addr->sa_data))
 452                         sdata->u.sta.flags |= IEEE80211_STA_AUTO_BSSID_SEL |
 453                                 IEEE80211_STA_AUTO_CHANNEL_SEL;
 454                 else if (is_broadcast_ether_addr((u8 *) &ap_addr->sa_data))
 455                         sdata->u.sta.flags |= IEEE80211_STA_AUTO_BSSID_SEL;
 456                 else
 457                         sdata->u.sta.flags &= ~IEEE80211_STA_AUTO_BSSID_SEL;
 458                 ret = ieee80211_sta_set_bssid(dev, (u8 *) &ap_addr->sa_data);
 459                 if (ret)
 460                         return ret;
 461                 ieee80211_sta_req_auth(dev, &sdata->u.sta);
 462                 return 0;
 463         } else if (sdata->vif.type == IEEE80211_IF_TYPE_WDS) {
 464                 /*
 465                  * If it is necessary to update the WDS peer address
 466                  * while the interface is running, then we need to do
 467                  * more work here, namely if it is running we need to
 468                  * add a new and remove the old STA entry, this is
 469                  * normally handled by _open() and _stop().
 470                  */
 471                 if (netif_running(dev))
 472                         return -EBUSY;
 473
 474                 memcpy(&sdata->u.wds.remote_addr, (u8 *) &ap_addr->sa_data,
 475                        ETH_ALEN);
 476
 477                 return 0;
 478         }
 479
 480         return -EOPNOTSUPP;
 481 }
 482
 483
 484 static int ieee80211_ioctl_giwap(struct net_device *dev,
 485                                  struct iw_request_info *info,
 486                                  struct sockaddr *ap_addr, char *extra)
 487 {
 488         struct ieee80211_sub_if_data *sdata;
 489
 490         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 491         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
 492             sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
 493                 ap_addr->sa_family = ARPHRD_ETHER;
 494                 memcpy(&ap_addr->sa_data, sdata->u.sta.bssid, ETH_ALEN);
 495                 return 0;
 496         } else if (sdata->vif.type == IEEE80211_IF_TYPE_WDS) {
 497                 ap_addr->sa_family = ARPHRD_ETHER;
 498                 memcpy(&ap_addr->sa_data, sdata->u.wds.remote_addr, ETH_ALEN);
 499                 return 0;
 500         }
 501
 502         return -EOPNOTSUPP;
 503 }
 504
 505
 506 static int ieee80211_ioctl_siwscan(struct net_device *dev,
 507                                    struct iw_request_info *info,
 508                                    union iwreq_data *wrqu, char *extra)
 509 {
 510         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 511         struct iw_scan_req *req = NULL;
 512         u8 *ssid = NULL;
 513         size_t ssid_len = 0;
 514
 515         if (!netif_running(dev))
 516                 return -ENETDOWN;
 517
 518         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
 519             sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
 520             sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT &&
 521             sdata->vif.type != IEEE80211_IF_TYPE_AP)
 522                 return -EOPNOTSUPP;
 523
 524         /* if SSID was specified explicitly then use that */
 525         if (wrqu->data.length == sizeof(struct iw_scan_req) &&
 526             wrqu->data.flags & IW_SCAN_THIS_ESSID) {
 527                 req = (struct iw_scan_req *)extra;
 528                 ssid = req->essid;
 529                 ssid_len = req->essid_len;
 530         }
 531
 532         return ieee80211_sta_req_scan(dev, ssid, ssid_len);
 533 }
 534
 535
 536 static int ieee80211_ioctl_giwscan(struct net_device *dev,
 537                                    struct iw_request_info *info,
 538                                    struct iw_point *data, char *extra)
 539 {
 540         int res;
 541         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 542
 543         if (local->sta_sw_scanning || local->sta_hw_scanning)
 544                 return -EAGAIN;
 545
 546         res = ieee80211_sta_scan_results(dev, extra, data->length);
 547         if (res >= 0) {
 548                 data->length = res;
 549                 return 0;
 550         }
 551         data->length = 0;
 552         return res;
 553 }
 554
 555
 556 static int ieee80211_ioctl_siwrate(struct net_device *dev,
 557                                   struct iw_request_info *info,
 558                                   struct iw_param *rate, char *extra)
 559 {
 560         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 561         int i, err = -EINVAL;
 562         u32 target_rate = rate->value / 100000;
 563         struct ieee80211_sub_if_data *sdata;
 564         struct ieee80211_supported_band *sband;
 565
 566         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 567         if (!sdata->bss)
 568                 return -ENODEV;
 569
 570         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 571
 572         /* target_rate = -1, rate->fixed = 0 means auto only, so use all rates
 573          * target_rate = X, rate->fixed = 1 means only rate X
 574          * target_rate = X, rate->fixed = 0 means all rates <= X */
 575         sdata->bss->max_ratectrl_rateidx = -1;
 576         sdata->bss->force_unicast_rateidx = -1;
 577         if (rate->value < 0)
 578                 return 0;
 579
 580         for (i=0; i< sband->n_bitrates; i++) {
 581                 struct ieee80211_rate *brate = &sband->bitrates[i];
 582                 int this_rate = brate->bitrate;
 583
 584                 if (target_rate == this_rate) {
 585                         sdata->bss->max_ratectrl_rateidx = i;
 586                         if (rate->fixed)
 587                                 sdata->bss->force_unicast_rateidx = i;
 588                         err = 0;
 589                         break;
 590                 }
 591         }
 592         return err;
 593 }
 594
 595 static int ieee80211_ioctl_giwrate(struct net_device *dev,
 596                                   struct iw_request_info *info,
 597                                   struct iw_param *rate, char *extra)
 598 {
 599         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 600         struct sta_info *sta;
 601         struct ieee80211_sub_if_data *sdata;
 602         struct ieee80211_supported_band *sband;
 603
 604         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 605
 606         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
 607                 return -EOPNOTSUPP;
 608
 609         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 610
 611         rcu_read_lock();
 612
 613         sta = sta_info_get(local, sdata->u.sta.bssid);
 614
 615         if (sta && sta->txrate_idx < sband->n_bitrates)
 616                 rate->value = sband->bitrates[sta->txrate_idx].bitrate;
 617         else
 618                 rate->value = 0;
 619
 620         rcu_read_unlock();
 621
 622         if (!sta)
 623                 return -ENODEV;
 624
 625         rate->value *= 100000;
 626
 627         return 0;
 628 }
 629
 630 static int ieee80211_ioctl_siwtxpower(struct net_device *dev,
 631                                       struct iw_request_info *info,
 632                                       union iwreq_data *data, char *extra)
 633 {
 634         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 635         bool need_reconfig = 0;
 636         int new_power_level;
 637
 638         if ((data->txpower.flags & IW_TXPOW_TYPE) != IW_TXPOW_DBM)
 639                 return -EINVAL;
 640         if (data->txpower.flags & IW_TXPOW_RANGE)
 641                 return -EINVAL;
 642
 643         if (data->txpower.fixed) {
 644                 new_power_level = data->txpower.value;
 645         } else {
 646                 /*
 647                  * Automatic power level. Use maximum power for the current
 648                  * channel. Should be part of rate control.
 649                  */
 650                 struct ieee80211_channel* chan = local->hw.conf.channel;
 651                 if (!chan)
 652                         return -EINVAL;
 653
 654                 new_power_level = chan->max_power;
 655         }
 656
 657         if (local->hw.conf.power_level != new_power_level) {
 658                 local->hw.conf.power_level = new_power_level;
 659                 need_reconfig = 1;
 660         }
 661
 662         if (local->hw.conf.radio_enabled != !(data->txpower.disabled)) {
 663                 local->hw.conf.radio_enabled = !(data->txpower.disabled);
 664                 need_reconfig = 1;
 665                 ieee80211_led_radio(local, local->hw.conf.radio_enabled);
 666         }
 667
 668         if (need_reconfig) {
 669                 ieee80211_hw_config(local);
 670                 /* The return value of hw_config is not of big interest here,
 671                  * as it doesn't say that it failed because of _this_ config
 672                  * change or something else. Ignore it. */
 673         }
 674
 675         return 0;
 676 }
 677
 678 static int ieee80211_ioctl_giwtxpower(struct net_device *dev,
 679                                    struct iw_request_info *info,
 680                                    union iwreq_data *data, char *extra)
 681 {
 682         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 683
 684         data->txpower.fixed = 1;
 685         data->txpower.disabled = !(local->hw.conf.radio_enabled);
 686         data->txpower.value = local->hw.conf.power_level;
 687         data->txpower.flags = IW_TXPOW_DBM;
 688
 689         return 0;
 690 }
 691
 692 static int ieee80211_ioctl_siwrts(struct net_device *dev,
 693                                   struct iw_request_info *info,
 694                                   struct iw_param *rts, char *extra)
 695 {
 696         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 697
 698         if (rts->disabled)
 699                 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 700         else if (rts->value < 0 || rts->value > IEEE80211_MAX_RTS_THRESHOLD)
 701                 return -EINVAL;
 702         else
 703                 local->rts_threshold = rts->value;
 704
 705         /* If the wlan card performs RTS/CTS in hardware/firmware,
 706          * configure it here */
 707
 708         if (local->ops->set_rts_threshold)
 709                 local->ops->set_rts_threshold(local_to_hw(local),
 710                                              local->rts_threshold);
 711
 712         return 0;
 713 }
 714
 715 static int ieee80211_ioctl_giwrts(struct net_device *dev,
 716                                   struct iw_request_info *info,
 717                                   struct iw_param *rts, char *extra)
 718 {
 719         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 720
 721         rts->value = local->rts_threshold;
 722         rts->disabled = (rts->value >= IEEE80211_MAX_RTS_THRESHOLD);
 723         rts->fixed = 1;
 724
 725         return 0;
 726 }
 727
 728
 729 static int ieee80211_ioctl_siwfrag(struct net_device *dev,
 730                                    struct iw_request_info *info,
 731                                    struct iw_param *frag, char *extra)
 732 {
 733         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 734
 735         if (frag->disabled)
 736                 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
 737         else if (frag->value < 256 ||
 738                  frag->value > IEEE80211_MAX_FRAG_THRESHOLD)
 739                 return -EINVAL;
 740         else {
 741                 /* Fragment length must be even, so strip LSB. */
 742                 local->fragmentation_threshold = frag->value & ~0x1;
 743         }
 744
 745         /* If the wlan card performs fragmentation in hardware/firmware,
 746          * configure it here */
 747
 748         if (local->ops->set_frag_threshold)
 749                 local->ops->set_frag_threshold(
 750                         local_to_hw(local),
 751                         local->fragmentation_threshold);
 752
 753         return 0;
 754 }
 755
 756 static int ieee80211_ioctl_giwfrag(struct net_device *dev,
 757                                    struct iw_request_info *info,
 758                                    struct iw_param *frag, char *extra)
 759 {
 760         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 761
 762         frag->value = local->fragmentation_threshold;
 763         frag->disabled = (frag->value >= IEEE80211_MAX_RTS_THRESHOLD);
 764         frag->fixed = 1;
 765
 766         return 0;
 767 }
 768
 769
 770 static int ieee80211_ioctl_siwretry(struct net_device *dev,
 771                                     struct iw_request_info *info,
 772                                     struct iw_param *retry, char *extra)
 773 {
 774         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 775
 776         if (retry->disabled ||
 777             (retry->flags & IW_RETRY_TYPE) != IW_RETRY_LIMIT)
 778                 return -EINVAL;
 779
 780         if (retry->flags & IW_RETRY_MAX)
 781                 local->long_retry_limit = retry->value;
 782         else if (retry->flags & IW_RETRY_MIN)
 783                 local->short_retry_limit = retry->value;
 784         else {
 785                 local->long_retry_limit = retry->value;
 786                 local->short_retry_limit = retry->value;
 787         }
 788
 789         if (local->ops->set_retry_limit) {
 790                 return local->ops->set_retry_limit(
 791                         local_to_hw(local),
 792                         local->short_retry_limit,
 793                         local->long_retry_limit);
 794         }
 795
 796         return 0;
 797 }
 798
 799
 800 static int ieee80211_ioctl_giwretry(struct net_device *dev,
 801                                     struct iw_request_info *info,
 802                                     struct iw_param *retry, char *extra)
 803 {
 804         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 805
 806         retry->disabled = 0;
 807         if (retry->flags == 0 || retry->flags & IW_RETRY_MIN) {
 808                 /* first return min value, iwconfig will ask max value
 809                  * later if needed */
 810                 retry->flags |= IW_RETRY_LIMIT;
 811                 retry->value = local->short_retry_limit;
 812                 if (local->long_retry_limit != local->short_retry_limit)
 813                         retry->flags |= IW_RETRY_MIN;
 814                 return 0;
 815         }
 816         if (retry->flags & IW_RETRY_MAX) {
 817                 retry->flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
 818                 retry->value = local->long_retry_limit;
 819         }
 820
 821         return 0;
 822 }
 823
 824 static int ieee80211_ioctl_siwmlme(struct net_device *dev,
 825                                    struct iw_request_info *info,
 826                                    struct iw_point *data, char *extra)
 827 {
 828         struct ieee80211_sub_if_data *sdata;
 829         struct iw_mlme *mlme = (struct iw_mlme *) extra;
 830
 831         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 832         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
 833             sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
 834                 return -EINVAL;
 835
 836         switch (mlme->cmd) {
 837         case IW_MLME_DEAUTH:
 838                 /* TODO: mlme->addr.sa_data */
 839                 return ieee80211_sta_deauthenticate(dev, mlme->reason_code);
 840         case IW_MLME_DISASSOC:
 841                 /* TODO: mlme->addr.sa_data */
 842                 return ieee80211_sta_disassociate(dev, mlme->reason_code);
 843         default:
 844                 return -EOPNOTSUPP;
 845         }
 846 }
 847
 848
 849 static int ieee80211_ioctl_siwencode(struct net_device *dev,
 850                                      struct iw_request_info *info,
 851                                      struct iw_point *erq, char *keybuf)
 852 {
 853         struct ieee80211_sub_if_data *sdata;
 854         int idx, i, alg = ALG_WEP;
 855         u8 bcaddr[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 856         int remove = 0;
 857
 858         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 859
 860         idx = erq->flags & IW_ENCODE_INDEX;
 861         if (idx == 0) {
 862                 if (sdata->default_key)
 863                         for (i = 0; i < NUM_DEFAULT_KEYS; i++) {
 864                                 if (sdata->default_key == sdata->keys[i]) {
 865                                         idx = i;
 866                                         break;
 867                                 }
 868                         }
 869         } else if (idx < 1 || idx > 4)
 870                 return -EINVAL;
 871         else
 872                 idx--;
 873
 874         if (erq->flags & IW_ENCODE_DISABLED)
 875                 remove = 1;
 876         else if (erq->length == 0) {
 877                 /* No key data - just set the default TX key index */
 878                 ieee80211_set_default_key(sdata, idx);
 879                 return 0;
 880         }
 881
 882         return ieee80211_set_encryption(
 883                 dev, bcaddr,
 884                 idx, alg, remove,
 885                 !sdata->default_key,
 886                 keybuf, erq->length);
 887 }
 888
 889
 890 static int ieee80211_ioctl_giwencode(struct net_device *dev,
 891                                      struct iw_request_info *info,
 892                                      struct iw_point *erq, char *key)
 893 {
 894         struct ieee80211_sub_if_data *sdata;
 895         int idx, i;
 896
 897         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 898
 899         idx = erq->flags & IW_ENCODE_INDEX;
 900         if (idx < 1 || idx > 4) {
 901                 idx = -1;
 902                 if (!sdata->default_key)
 903                         idx = 0;
 904                 else for (i = 0; i < NUM_DEFAULT_KEYS; i++) {
 905                         if (sdata->default_key == sdata->keys[i]) {
 906                                 idx = i;
 907                                 break;
 908                         }
 909                 }
 910                 if (idx < 0)
 911                         return -EINVAL;
 912         } else
 913                 idx--;
 914
 915         erq->flags = idx + 1;
 916
 917         if (!sdata->keys[idx]) {
 918                 erq->length = 0;
 919                 erq->flags |= IW_ENCODE_DISABLED;
 920                 return 0;
 921         }
 922
 923         memcpy(key, sdata->keys[idx]->conf.key,
 924                min_t(int, erq->length, sdata->keys[idx]->conf.keylen));
 925         erq->length = sdata->keys[idx]->conf.keylen;
 926         erq->flags |= IW_ENCODE_ENABLED;
 927
 928         return 0;
 929 }
 930
 931 static int ieee80211_ioctl_siwauth(struct net_device *dev,
 932                                    struct iw_request_info *info,
 933                                    struct iw_param *data, char *extra)
 934 {
 935         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 936         int ret = 0;
 937
 938         switch (data->flags & IW_AUTH_INDEX) {
 939         case IW_AUTH_WPA_VERSION:
 940         case IW_AUTH_CIPHER_PAIRWISE:
 941         case IW_AUTH_CIPHER_GROUP:
 942         case IW_AUTH_WPA_ENABLED:
 943         case IW_AUTH_RX_UNENCRYPTED_EAPOL:
 944         case IW_AUTH_KEY_MGMT:
 945                 break;
 946         case IW_AUTH_DROP_UNENCRYPTED:
 947                 sdata->drop_unencrypted = !!data->value;
 948                 break;
 949         case IW_AUTH_PRIVACY_INVOKED:
 950                 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
 951                         ret = -EINVAL;
 952                 else {
 953                         sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
 954                         /*
 955                          * Privacy invoked by wpa_supplicant, store the
 956                          * value and allow associating to a protected
 957                          * network without having a key up front.
 958                          */
 959                         if (data->value)
 960                                 sdata->u.sta.flags |=
 961                                         IEEE80211_STA_PRIVACY_INVOKED;
 962                 }
 963                 break;
 964         case IW_AUTH_80211_AUTH_ALG:
 965                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
 966                     sdata->vif.type == IEEE80211_IF_TYPE_IBSS)
 967                         sdata->u.sta.auth_algs = data->value;
 968                 else
 969                         ret = -EOPNOTSUPP;
 970                 break;
 971         default:
 972                 ret = -EOPNOTSUPP;
 973                 break;
 974         }
 975         return ret;
 976 }
 977
 978 /* Get wireless statistics.  Called by /proc/net/wireless and by SIOCGIWSTATS */
 979 static struct iw_statistics *ieee80211_get_wireless_stats(struct net_device *dev)
 980 {
 981         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 982         struct iw_statistics *wstats = &local->wstats;
 983         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 984         struct sta_info *sta = NULL;
 985
 986         rcu_read_lock();
 987
 988         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
 989             sdata->vif.type == IEEE80211_IF_TYPE_IBSS)
 990                 sta = sta_info_get(local, sdata->u.sta.bssid);
 991         if (!sta) {
 992                 wstats->discard.fragment = 0;
 993                 wstats->discard.misc = 0;
 994                 wstats->qual.qual = 0;
 995                 wstats->qual.level = 0;
 996                 wstats->qual.noise = 0;
 997                 wstats->qual.updated = IW_QUAL_ALL_INVALID;
 998         } else {
 999                 wstats->qual.level = sta->last_rssi;
1000                 wstats->qual.qual = sta->last_signal;
1001                 wstats->qual.noise = sta->last_noise;
1002                 wstats->qual.updated = local->wstats_flags;
1003         }
1004
1005         rcu_read_unlock();
1006
1007         return wstats;
1008 }
1009
1010 static int ieee80211_ioctl_giwauth(struct net_device *dev,
1011                                    struct iw_request_info *info,
1012                                    struct iw_param *data, char *extra)
1013 {
1014         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1015         int ret = 0;
1016
1017         switch (data->flags & IW_AUTH_INDEX) {
1018         case IW_AUTH_80211_AUTH_ALG:
1019                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
1020                     sdata->vif.type == IEEE80211_IF_TYPE_IBSS)
1021                         data->value = sdata->u.sta.auth_algs;
1022                 else
1023                         ret = -EOPNOTSUPP;
1024                 break;
1025         default:
1026                 ret = -EOPNOTSUPP;
1027                 break;
1028         }
1029         return ret;
1030 }
1031
1032
1033 static int ieee80211_ioctl_siwencodeext(struct net_device *dev,
1034                                         struct iw_request_info *info,
1035                                         struct iw_point *erq, char *extra)
1036 {
1037         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1038         struct iw_encode_ext *ext = (struct iw_encode_ext *) extra;
1039         int uninitialized_var(alg), idx, i, remove = 0;
1040
1041         switch (ext->alg) {
1042         case IW_ENCODE_ALG_NONE:
1043                 remove = 1;
1044                 break;
1045         case IW_ENCODE_ALG_WEP:
1046                 alg = ALG_WEP;
1047                 break;
1048         case IW_ENCODE_ALG_TKIP:
1049                 alg = ALG_TKIP;
1050                 break;
1051         case IW_ENCODE_ALG_CCMP:
1052                 alg = ALG_CCMP;
1053                 break;
1054         default:
1055                 return -EOPNOTSUPP;
1056         }
1057
1058         if (erq->flags & IW_ENCODE_DISABLED)
1059                 remove = 1;
1060
1061         idx = erq->flags & IW_ENCODE_INDEX;
1062         if (idx < 1 || idx > 4) {
1063                 idx = -1;
1064                 if (!sdata->default_key)
1065                         idx = 0;
1066                 else for (i = 0; i < NUM_DEFAULT_KEYS; i++) {
1067                         if (sdata->default_key == sdata->keys[i]) {
1068                                 idx = i;
1069                                 break;
1070                         }
1071                 }
1072                 if (idx < 0)
1073                         return -EINVAL;
1074         } else
1075                 idx--;
1076
1077         return ieee80211_set_encryption(dev, ext->addr.sa_data, idx, alg,
1078                                         remove,
1079                                         ext->ext_flags &
1080                                         IW_ENCODE_EXT_SET_TX_KEY,
1081                                         ext->key, ext->key_len);
1082 }
1083
1084
1085 /* Structures to export the Wireless Handlers */
1086
1087 static const iw_handler ieee80211_handler[] =
1088 {
1089         (iw_handler) NULL,                              /* SIOCSIWCOMMIT */
1090         (iw_handler) ieee80211_ioctl_giwname,           /* SIOCGIWNAME */
1091         (iw_handler) NULL,                              /* SIOCSIWNWID */
1092         (iw_handler) NULL,                              /* SIOCGIWNWID */
1093         (iw_handler) ieee80211_ioctl_siwfreq,           /* SIOCSIWFREQ */
1094         (iw_handler) ieee80211_ioctl_giwfreq,           /* SIOCGIWFREQ */
1095         (iw_handler) ieee80211_ioctl_siwmode,           /* SIOCSIWMODE */
1096         (iw_handler) ieee80211_ioctl_giwmode,           /* SIOCGIWMODE */
1097         (iw_handler) NULL,                              /* SIOCSIWSENS */
1098         (iw_handler) NULL,                              /* SIOCGIWSENS */
1099         (iw_handler) NULL /* not used */,               /* SIOCSIWRANGE */
1100         (iw_handler) ieee80211_ioctl_giwrange,          /* SIOCGIWRANGE */
1101         (iw_handler) NULL /* not used */,               /* SIOCSIWPRIV */
1102         (iw_handler) NULL /* kernel code */,            /* SIOCGIWPRIV */
1103         (iw_handler) NULL /* not used */,               /* SIOCSIWSTATS */
1104         (iw_handler) NULL /* kernel code */,            /* SIOCGIWSTATS */
1105         (iw_handler) NULL,                              /* SIOCSIWSPY */
1106         (iw_handler) NULL,                              /* SIOCGIWSPY */
1107         (iw_handler) NULL,                              /* SIOCSIWTHRSPY */
1108         (iw_handler) NULL,                              /* SIOCGIWTHRSPY */
1109         (iw_handler) ieee80211_ioctl_siwap,             /* SIOCSIWAP */
1110         (iw_handler) ieee80211_ioctl_giwap,             /* SIOCGIWAP */
1111         (iw_handler) ieee80211_ioctl_siwmlme,           /* SIOCSIWMLME */
1112         (iw_handler) NULL,                              /* SIOCGIWAPLIST */
1113         (iw_handler) ieee80211_ioctl_siwscan,           /* SIOCSIWSCAN */
1114         (iw_handler) ieee80211_ioctl_giwscan,           /* SIOCGIWSCAN */
1115         (iw_handler) ieee80211_ioctl_siwessid,          /* SIOCSIWESSID */
1116         (iw_handler) ieee80211_ioctl_giwessid,          /* SIOCGIWESSID */
1117         (iw_handler) NULL,                              /* SIOCSIWNICKN */
1118         (iw_handler) NULL,                              /* SIOCGIWNICKN */
1119         (iw_handler) NULL,                              /* -- hole -- */
1120         (iw_handler) NULL,                              /* -- hole -- */
1121         (iw_handler) ieee80211_ioctl_siwrate,           /* SIOCSIWRATE */
1122         (iw_handler) ieee80211_ioctl_giwrate,           /* SIOCGIWRATE */
1123         (iw_handler) ieee80211_ioctl_siwrts,            /* SIOCSIWRTS */
1124         (iw_handler) ieee80211_ioctl_giwrts,            /* SIOCGIWRTS */
1125         (iw_handler) ieee80211_ioctl_siwfrag,           /* SIOCSIWFRAG */
1126         (iw_handler) ieee80211_ioctl_giwfrag,           /* SIOCGIWFRAG */
1127         (iw_handler) ieee80211_ioctl_siwtxpower,        /* SIOCSIWTXPOW */
1128         (iw_handler) ieee80211_ioctl_giwtxpower,        /* SIOCGIWTXPOW */
1129         (iw_handler) ieee80211_ioctl_siwretry,          /* SIOCSIWRETRY */
1130         (iw_handler) ieee80211_ioctl_giwretry,          /* SIOCGIWRETRY */
1131         (iw_handler) ieee80211_ioctl_siwencode,         /* SIOCSIWENCODE */
1132         (iw_handler) ieee80211_ioctl_giwencode,         /* SIOCGIWENCODE */
1133         (iw_handler) NULL,                              /* SIOCSIWPOWER */
1134         (iw_handler) NULL,                              /* SIOCGIWPOWER */
1135         (iw_handler) NULL,                              /* -- hole -- */
1136         (iw_handler) NULL,                              /* -- hole -- */
1137         (iw_handler) ieee80211_ioctl_siwgenie,          /* SIOCSIWGENIE */
1138         (iw_handler) NULL,                              /* SIOCGIWGENIE */
1139         (iw_handler) ieee80211_ioctl_siwauth,           /* SIOCSIWAUTH */
1140         (iw_handler) ieee80211_ioctl_giwauth,           /* SIOCGIWAUTH */
1141         (iw_handler) ieee80211_ioctl_siwencodeext,      /* SIOCSIWENCODEEXT */
1142         (iw_handler) NULL,                              /* SIOCGIWENCODEEXT */
1143         (iw_handler) NULL,                              /* SIOCSIWPMKSA */
1144         (iw_handler) NULL,                              /* -- hole -- */
1145 };
1146
1147 const struct iw_handler_def ieee80211_iw_handler_def =
1148 {
1149         .num_standard   = ARRAY_SIZE(ieee80211_handler),
1150         .standard       = (iw_handler *) ieee80211_handler,
1151         .get_wireless_stats = ieee80211_get_wireless_stats,
1152 };