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         if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC ||
 173             local->hw.flags & IEEE80211_HW_SIGNAL_DB)
 174                 range->max_qual.level = local->hw.max_signal;
 175         else if  (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
 176                 range->max_qual.level = -110;
 177         else
 178                 range->max_qual.level = 0;
 179
 180         if (local->hw.flags & IEEE80211_HW_NOISE_DBM)
 181                 range->max_qual.noise = -110;
 182         else
 183                 range->max_qual.noise = 0;
 184
 185         range->max_qual.qual = 100;
 186         range->max_qual.updated = local->wstats_flags;
 187
 188         range->avg_qual.qual = 50;
 189         /* not always true but better than nothing */
 190         range->avg_qual.level = range->max_qual.level / 2;
 191         range->avg_qual.noise = range->max_qual.noise / 2;
 192         range->avg_qual.updated = local->wstats_flags;
 193
 194         range->enc_capa = IW_ENC_CAPA_WPA | IW_ENC_CAPA_WPA2 |
 195                           IW_ENC_CAPA_CIPHER_TKIP | IW_ENC_CAPA_CIPHER_CCMP;
 196
 197
 198         for (band = 0; band < IEEE80211_NUM_BANDS; band ++) {
 199                 int i;
 200                 struct ieee80211_supported_band *sband;
 201
 202                 sband = local->hw.wiphy->bands[band];
 203
 204                 if (!sband)
 205                         continue;
 206
 207                 for (i = 0; i < sband->n_channels && c < IW_MAX_FREQUENCIES; i++) {
 208                         struct ieee80211_channel *chan = &sband->channels[i];
 209
 210                         if (!(chan->flags & IEEE80211_CHAN_DISABLED)) {
 211                                 range->freq[c].i =
 212                                         ieee80211_frequency_to_channel(
 213                                                 chan->center_freq);
 214                                 range->freq[c].m = chan->center_freq;
 215                                 range->freq[c].e = 6;
 216                                 c++;
 217                         }
 218                 }
 219         }
 220         range->num_channels = c;
 221         range->num_frequency = c;
 222
 223         IW_EVENT_CAPA_SET_KERNEL(range->event_capa);
 224         IW_EVENT_CAPA_SET(range->event_capa, SIOCGIWTHRSPY);
 225         IW_EVENT_CAPA_SET(range->event_capa, SIOCGIWAP);
 226         IW_EVENT_CAPA_SET(range->event_capa, SIOCGIWSCAN);
 227
 228         range->scan_capa |= IW_SCAN_CAPA_ESSID;
 229
 230         return 0;
 231 }
 232
 233
 234 static int ieee80211_ioctl_siwmode(struct net_device *dev,
 235                                    struct iw_request_info *info,
 236                                    __u32 *mode, char *extra)
 237 {
 238         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 239         int type;
 240
 241         if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN)
 242                 return -EOPNOTSUPP;
 243
 244         switch (*mode) {
 245         case IW_MODE_INFRA:
 246                 type = IEEE80211_IF_TYPE_STA;
 247                 break;
 248         case IW_MODE_ADHOC:
 249                 type = IEEE80211_IF_TYPE_IBSS;
 250                 break;
 251         case IW_MODE_REPEAT:
 252                 type = IEEE80211_IF_TYPE_WDS;
 253                 break;
 254         case IW_MODE_MONITOR:
 255                 type = IEEE80211_IF_TYPE_MNTR;
 256                 break;
 257         default:
 258                 return -EINVAL;
 259         }
 260
 261         if (type == sdata->vif.type)
 262                 return 0;
 263         if (netif_running(dev))
 264                 return -EBUSY;
 265
 266         ieee80211_if_reinit(dev);
 267         ieee80211_if_set_type(dev, type);
 268
 269         return 0;
 270 }
 271
 272
 273 static int ieee80211_ioctl_giwmode(struct net_device *dev,
 274                                    struct iw_request_info *info,
 275                                    __u32 *mode, char *extra)
 276 {
 277         struct ieee80211_sub_if_data *sdata;
 278
 279         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 280         switch (sdata->vif.type) {
 281         case IEEE80211_IF_TYPE_AP:
 282                 *mode = IW_MODE_MASTER;
 283                 break;
 284         case IEEE80211_IF_TYPE_STA:
 285                 *mode = IW_MODE_INFRA;
 286                 break;
 287         case IEEE80211_IF_TYPE_IBSS:
 288                 *mode = IW_MODE_ADHOC;
 289                 break;
 290         case IEEE80211_IF_TYPE_MNTR:
 291                 *mode = IW_MODE_MONITOR;
 292                 break;
 293         case IEEE80211_IF_TYPE_WDS:
 294                 *mode = IW_MODE_REPEAT;
 295                 break;
 296         case IEEE80211_IF_TYPE_VLAN:
 297                 *mode = IW_MODE_SECOND;         /* FIXME */
 298                 break;
 299         default:
 300                 *mode = IW_MODE_AUTO;
 301                 break;
 302         }
 303         return 0;
 304 }
 305
 306 int ieee80211_set_freq(struct ieee80211_local *local, int freqMHz)
 307 {
 308         int ret = -EINVAL;
 309         struct ieee80211_channel *chan;
 310
 311         chan = ieee80211_get_channel(local->hw.wiphy, freqMHz);
 312
 313         if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) {
 314                 local->oper_channel = chan;
 315
 316                 if (local->sta_sw_scanning || local->sta_hw_scanning)
 317                         ret = 0;
 318                 else
 319                         ret = ieee80211_hw_config(local);
 320
 321                 rate_control_clear(local);
 322         }
 323
 324         return ret;
 325 }
 326
 327 static int ieee80211_ioctl_siwfreq(struct net_device *dev,
 328                                    struct iw_request_info *info,
 329                                    struct iw_freq *freq, char *extra)
 330 {
 331         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 332         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 333
 334         if (sdata->vif.type == IEEE80211_IF_TYPE_STA)
 335                 sdata->u.sta.flags &= ~IEEE80211_STA_AUTO_CHANNEL_SEL;
 336
 337         /* freq->e == 0: freq->m = channel; otherwise freq = m * 10^e */
 338         if (freq->e == 0) {
 339                 if (freq->m < 0) {
 340                         if (sdata->vif.type == IEEE80211_IF_TYPE_STA)
 341                                 sdata->u.sta.flags |=
 342                                         IEEE80211_STA_AUTO_CHANNEL_SEL;
 343                         return 0;
 344                 } else
 345                         return ieee80211_set_freq(local,
 346                                 ieee80211_channel_to_frequency(freq->m));
 347         } else {
 348                 int i, div = 1000000;
 349                 for (i = 0; i < freq->e; i++)
 350                         div /= 10;
 351                 if (div > 0)
 352                         return ieee80211_set_freq(local, freq->m / div);
 353                 else
 354                         return -EINVAL;
 355         }
 356 }
 357
 358
 359 static int ieee80211_ioctl_giwfreq(struct net_device *dev,
 360                                    struct iw_request_info *info,
 361                                    struct iw_freq *freq, char *extra)
 362 {
 363         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 364
 365         freq->m = local->hw.conf.channel->center_freq;
 366         freq->e = 6;
 367
 368         return 0;
 369 }
 370
 371
 372 static int ieee80211_ioctl_siwessid(struct net_device *dev,
 373                                     struct iw_request_info *info,
 374                                     struct iw_point *data, char *ssid)
 375 {
 376         struct ieee80211_sub_if_data *sdata;
 377         size_t len = data->length;
 378
 379         /* iwconfig uses nul termination in SSID.. */
 380         if (len > 0 && ssid[len - 1] == '\0')
 381                 len--;
 382
 383         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 384         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
 385             sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
 386                 int ret;
 387                 if (sdata->flags & IEEE80211_SDATA_USERSPACE_MLME) {
 388                         if (len > IEEE80211_MAX_SSID_LEN)
 389                                 return -EINVAL;
 390                         memcpy(sdata->u.sta.ssid, ssid, len);
 391                         sdata->u.sta.ssid_len = len;
 392                         return 0;
 393                 }
 394                 if (data->flags)
 395                         sdata->u.sta.flags &= ~IEEE80211_STA_AUTO_SSID_SEL;
 396                 else
 397                         sdata->u.sta.flags |= IEEE80211_STA_AUTO_SSID_SEL;
 398                 ret = ieee80211_sta_set_ssid(dev, ssid, len);
 399                 if (ret)
 400                         return ret;
 401                 ieee80211_sta_req_auth(dev, &sdata->u.sta);
 402                 return 0;
 403         }
 404
 405         if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
 406                 memcpy(sdata->u.ap.ssid, ssid, len);
 407                 memset(sdata->u.ap.ssid + len, 0,
 408                        IEEE80211_MAX_SSID_LEN - len);
 409                 sdata->u.ap.ssid_len = len;
 410                 return ieee80211_if_config(dev);
 411         }
 412         return -EOPNOTSUPP;
 413 }
 414
 415
 416 static int ieee80211_ioctl_giwessid(struct net_device *dev,
 417                                     struct iw_request_info *info,
 418                                     struct iw_point *data, char *ssid)
 419 {
 420         size_t len;
 421
 422         struct ieee80211_sub_if_data *sdata;
 423         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 424         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
 425             sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
 426                 int res = ieee80211_sta_get_ssid(dev, ssid, &len);
 427                 if (res == 0) {
 428                         data->length = len;
 429                         data->flags = 1;
 430                 } else
 431                         data->flags = 0;
 432                 return res;
 433         }
 434
 435         if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
 436                 len = sdata->u.ap.ssid_len;
 437                 if (len > IW_ESSID_MAX_SIZE)
 438                         len = IW_ESSID_MAX_SIZE;
 439                 memcpy(ssid, sdata->u.ap.ssid, len);
 440                 data->length = len;
 441                 data->flags = 1;
 442                 return 0;
 443         }
 444         return -EOPNOTSUPP;
 445 }
 446
 447
 448 static int ieee80211_ioctl_siwap(struct net_device *dev,
 449                                  struct iw_request_info *info,
 450                                  struct sockaddr *ap_addr, char *extra)
 451 {
 452         struct ieee80211_sub_if_data *sdata;
 453
 454         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 455         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
 456             sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
 457                 int ret;
 458                 if (sdata->flags & IEEE80211_SDATA_USERSPACE_MLME) {
 459                         memcpy(sdata->u.sta.bssid, (u8 *) &ap_addr->sa_data,
 460                                ETH_ALEN);
 461                         return 0;
 462                 }
 463                 if (is_zero_ether_addr((u8 *) &ap_addr->sa_data))
 464                         sdata->u.sta.flags |= IEEE80211_STA_AUTO_BSSID_SEL |
 465                                 IEEE80211_STA_AUTO_CHANNEL_SEL;
 466                 else if (is_broadcast_ether_addr((u8 *) &ap_addr->sa_data))
 467                         sdata->u.sta.flags |= IEEE80211_STA_AUTO_BSSID_SEL;
 468                 else
 469                         sdata->u.sta.flags &= ~IEEE80211_STA_AUTO_BSSID_SEL;
 470                 ret = ieee80211_sta_set_bssid(dev, (u8 *) &ap_addr->sa_data);
 471                 if (ret)
 472                         return ret;
 473                 ieee80211_sta_req_auth(dev, &sdata->u.sta);
 474                 return 0;
 475         } else if (sdata->vif.type == IEEE80211_IF_TYPE_WDS) {
 476                 /*
 477                  * If it is necessary to update the WDS peer address
 478                  * while the interface is running, then we need to do
 479                  * more work here, namely if it is running we need to
 480                  * add a new and remove the old STA entry, this is
 481                  * normally handled by _open() and _stop().
 482                  */
 483                 if (netif_running(dev))
 484                         return -EBUSY;
 485
 486                 memcpy(&sdata->u.wds.remote_addr, (u8 *) &ap_addr->sa_data,
 487                        ETH_ALEN);
 488
 489                 return 0;
 490         }
 491
 492         return -EOPNOTSUPP;
 493 }
 494
 495
 496 static int ieee80211_ioctl_giwap(struct net_device *dev,
 497                                  struct iw_request_info *info,
 498                                  struct sockaddr *ap_addr, char *extra)
 499 {
 500         struct ieee80211_sub_if_data *sdata;
 501
 502         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 503         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
 504             sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
 505                 ap_addr->sa_family = ARPHRD_ETHER;
 506                 memcpy(&ap_addr->sa_data, sdata->u.sta.bssid, ETH_ALEN);
 507                 return 0;
 508         } else if (sdata->vif.type == IEEE80211_IF_TYPE_WDS) {
 509                 ap_addr->sa_family = ARPHRD_ETHER;
 510                 memcpy(&ap_addr->sa_data, sdata->u.wds.remote_addr, ETH_ALEN);
 511                 return 0;
 512         }
 513
 514         return -EOPNOTSUPP;
 515 }
 516
 517
 518 static int ieee80211_ioctl_siwscan(struct net_device *dev,
 519                                    struct iw_request_info *info,
 520                                    union iwreq_data *wrqu, char *extra)
 521 {
 522         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 523         struct iw_scan_req *req = NULL;
 524         u8 *ssid = NULL;
 525         size_t ssid_len = 0;
 526
 527         if (!netif_running(dev))
 528                 return -ENETDOWN;
 529
 530         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
 531             sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
 532             sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT &&
 533             sdata->vif.type != IEEE80211_IF_TYPE_AP)
 534                 return -EOPNOTSUPP;
 535
 536         /* if SSID was specified explicitly then use that */
 537         if (wrqu->data.length == sizeof(struct iw_scan_req) &&
 538             wrqu->data.flags & IW_SCAN_THIS_ESSID) {
 539                 req = (struct iw_scan_req *)extra;
 540                 ssid = req->essid;
 541                 ssid_len = req->essid_len;
 542         }
 543
 544         return ieee80211_sta_req_scan(dev, ssid, ssid_len);
 545 }
 546
 547
 548 static int ieee80211_ioctl_giwscan(struct net_device *dev,
 549                                    struct iw_request_info *info,
 550                                    struct iw_point *data, char *extra)
 551 {
 552         int res;
 553         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 554
 555         if (local->sta_sw_scanning || local->sta_hw_scanning)
 556                 return -EAGAIN;
 557
 558         res = ieee80211_sta_scan_results(dev, extra, data->length);
 559         if (res >= 0) {
 560                 data->length = res;
 561                 return 0;
 562         }
 563         data->length = 0;
 564         return res;
 565 }
 566
 567
 568 static int ieee80211_ioctl_siwrate(struct net_device *dev,
 569                                   struct iw_request_info *info,
 570                                   struct iw_param *rate, char *extra)
 571 {
 572         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 573         int i, err = -EINVAL;
 574         u32 target_rate = rate->value / 100000;
 575         struct ieee80211_sub_if_data *sdata;
 576         struct ieee80211_supported_band *sband;
 577
 578         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 579         if (!sdata->bss)
 580                 return -ENODEV;
 581
 582         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 583
 584         /* target_rate = -1, rate->fixed = 0 means auto only, so use all rates
 585          * target_rate = X, rate->fixed = 1 means only rate X
 586          * target_rate = X, rate->fixed = 0 means all rates <= X */
 587         sdata->bss->max_ratectrl_rateidx = -1;
 588         sdata->bss->force_unicast_rateidx = -1;
 589         if (rate->value < 0)
 590                 return 0;
 591
 592         for (i=0; i< sband->n_bitrates; i++) {
 593                 struct ieee80211_rate *brate = &sband->bitrates[i];
 594                 int this_rate = brate->bitrate;
 595
 596                 if (target_rate == this_rate) {
 597                         sdata->bss->max_ratectrl_rateidx = i;
 598                         if (rate->fixed)
 599                                 sdata->bss->force_unicast_rateidx = i;
 600                         err = 0;
 601                         break;
 602                 }
 603         }
 604         return err;
 605 }
 606
 607 static int ieee80211_ioctl_giwrate(struct net_device *dev,
 608                                   struct iw_request_info *info,
 609                                   struct iw_param *rate, char *extra)
 610 {
 611         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 612         struct sta_info *sta;
 613         struct ieee80211_sub_if_data *sdata;
 614         struct ieee80211_supported_band *sband;
 615
 616         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 617
 618         if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
 619                 return -EOPNOTSUPP;
 620
 621         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 622
 623         rcu_read_lock();
 624
 625         sta = sta_info_get(local, sdata->u.sta.bssid);
 626
 627         if (sta && sta->txrate_idx < sband->n_bitrates)
 628                 rate->value = sband->bitrates[sta->txrate_idx].bitrate;
 629         else
 630                 rate->value = 0;
 631
 632         rcu_read_unlock();
 633
 634         if (!sta)
 635                 return -ENODEV;
 636
 637         rate->value *= 100000;
 638
 639         return 0;
 640 }
 641
 642 static int ieee80211_ioctl_siwtxpower(struct net_device *dev,
 643                                       struct iw_request_info *info,
 644                                       union iwreq_data *data, char *extra)
 645 {
 646         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 647         bool need_reconfig = 0;
 648         int new_power_level;
 649
 650         if ((data->txpower.flags & IW_TXPOW_TYPE) != IW_TXPOW_DBM)
 651                 return -EINVAL;
 652         if (data->txpower.flags & IW_TXPOW_RANGE)
 653                 return -EINVAL;
 654
 655         if (data->txpower.fixed) {
 656                 new_power_level = data->txpower.value;
 657         } else {
 658                 /*
 659                  * Automatic power level. Use maximum power for the current
 660                  * channel. Should be part of rate control.
 661                  */
 662                 struct ieee80211_channel* chan = local->hw.conf.channel;
 663                 if (!chan)
 664                         return -EINVAL;
 665
 666                 new_power_level = chan->max_power;
 667         }
 668
 669         if (local->hw.conf.power_level != new_power_level) {
 670                 local->hw.conf.power_level = new_power_level;
 671                 need_reconfig = 1;
 672         }
 673
 674         if (local->hw.conf.radio_enabled != !(data->txpower.disabled)) {
 675                 local->hw.conf.radio_enabled = !(data->txpower.disabled);
 676                 need_reconfig = 1;
 677                 ieee80211_led_radio(local, local->hw.conf.radio_enabled);
 678         }
 679
 680         if (need_reconfig) {
 681                 ieee80211_hw_config(local);
 682                 /* The return value of hw_config is not of big interest here,
 683                  * as it doesn't say that it failed because of _this_ config
 684                  * change or something else. Ignore it. */
 685         }
 686
 687         return 0;
 688 }
 689
 690 static int ieee80211_ioctl_giwtxpower(struct net_device *dev,
 691                                    struct iw_request_info *info,
 692                                    union iwreq_data *data, char *extra)
 693 {
 694         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 695
 696         data->txpower.fixed = 1;
 697         data->txpower.disabled = !(local->hw.conf.radio_enabled);
 698         data->txpower.value = local->hw.conf.power_level;
 699         data->txpower.flags = IW_TXPOW_DBM;
 700
 701         return 0;
 702 }
 703
 704 static int ieee80211_ioctl_siwrts(struct net_device *dev,
 705                                   struct iw_request_info *info,
 706                                   struct iw_param *rts, char *extra)
 707 {
 708         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 709
 710         if (rts->disabled)
 711                 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 712         else if (rts->value < 0 || rts->value > IEEE80211_MAX_RTS_THRESHOLD)
 713                 return -EINVAL;
 714         else
 715                 local->rts_threshold = rts->value;
 716
 717         /* If the wlan card performs RTS/CTS in hardware/firmware,
 718          * configure it here */
 719
 720         if (local->ops->set_rts_threshold)
 721                 local->ops->set_rts_threshold(local_to_hw(local),
 722                                              local->rts_threshold);
 723
 724         return 0;
 725 }
 726
 727 static int ieee80211_ioctl_giwrts(struct net_device *dev,
 728                                   struct iw_request_info *info,
 729                                   struct iw_param *rts, char *extra)
 730 {
 731         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 732
 733         rts->value = local->rts_threshold;
 734         rts->disabled = (rts->value >= IEEE80211_MAX_RTS_THRESHOLD);
 735         rts->fixed = 1;
 736
 737         return 0;
 738 }
 739
 740
 741 static int ieee80211_ioctl_siwfrag(struct net_device *dev,
 742                                    struct iw_request_info *info,
 743                                    struct iw_param *frag, char *extra)
 744 {
 745         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 746
 747         if (frag->disabled)
 748                 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
 749         else if (frag->value < 256 ||
 750                  frag->value > IEEE80211_MAX_FRAG_THRESHOLD)
 751                 return -EINVAL;
 752         else {
 753                 /* Fragment length must be even, so strip LSB. */
 754                 local->fragmentation_threshold = frag->value & ~0x1;
 755         }
 756
 757         /* If the wlan card performs fragmentation in hardware/firmware,
 758          * configure it here */
 759
 760         if (local->ops->set_frag_threshold)
 761                 local->ops->set_frag_threshold(
 762                         local_to_hw(local),
 763                         local->fragmentation_threshold);
 764
 765         return 0;
 766 }
 767
 768 static int ieee80211_ioctl_giwfrag(struct net_device *dev,
 769                                    struct iw_request_info *info,
 770                                    struct iw_param *frag, char *extra)
 771 {
 772         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 773
 774         frag->value = local->fragmentation_threshold;
 775         frag->disabled = (frag->value >= IEEE80211_MAX_RTS_THRESHOLD);
 776         frag->fixed = 1;
 777
 778         return 0;
 779 }
 780
 781
 782 static int ieee80211_ioctl_siwretry(struct net_device *dev,
 783                                     struct iw_request_info *info,
 784                                     struct iw_param *retry, char *extra)
 785 {
 786         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 787
 788         if (retry->disabled ||
 789             (retry->flags & IW_RETRY_TYPE) != IW_RETRY_LIMIT)
 790                 return -EINVAL;
 791
 792         if (retry->flags & IW_RETRY_MAX)
 793                 local->long_retry_limit = retry->value;
 794         else if (retry->flags & IW_RETRY_MIN)
 795                 local->short_retry_limit = retry->value;
 796         else {
 797                 local->long_retry_limit = retry->value;
 798                 local->short_retry_limit = retry->value;
 799         }
 800
 801         if (local->ops->set_retry_limit) {
 802                 return local->ops->set_retry_limit(
 803                         local_to_hw(local),
 804                         local->short_retry_limit,
 805                         local->long_retry_limit);
 806         }
 807
 808         return 0;
 809 }
 810
 811
 812 static int ieee80211_ioctl_giwretry(struct net_device *dev,
 813                                     struct iw_request_info *info,
 814                                     struct iw_param *retry, char *extra)
 815 {
 816         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 817
 818         retry->disabled = 0;
 819         if (retry->flags == 0 || retry->flags & IW_RETRY_MIN) {
 820                 /* first return min value, iwconfig will ask max value
 821                  * later if needed */
 822                 retry->flags |= IW_RETRY_LIMIT;
 823                 retry->value = local->short_retry_limit;
 824                 if (local->long_retry_limit != local->short_retry_limit)
 825                         retry->flags |= IW_RETRY_MIN;
 826                 return 0;
 827         }
 828         if (retry->flags & IW_RETRY_MAX) {
 829                 retry->flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
 830                 retry->value = local->long_retry_limit;
 831         }
 832
 833         return 0;
 834 }
 835
 836 static int ieee80211_ioctl_siwmlme(struct net_device *dev,
 837                                    struct iw_request_info *info,
 838                                    struct iw_point *data, char *extra)
 839 {
 840         struct ieee80211_sub_if_data *sdata;
 841         struct iw_mlme *mlme = (struct iw_mlme *) extra;
 842
 843         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 844         if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
 845             sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
 846                 return -EINVAL;
 847
 848         switch (mlme->cmd) {
 849         case IW_MLME_DEAUTH:
 850                 /* TODO: mlme->addr.sa_data */
 851                 return ieee80211_sta_deauthenticate(dev, mlme->reason_code);
 852         case IW_MLME_DISASSOC:
 853                 /* TODO: mlme->addr.sa_data */
 854                 return ieee80211_sta_disassociate(dev, mlme->reason_code);
 855         default:
 856                 return -EOPNOTSUPP;
 857         }
 858 }
 859
 860
 861 static int ieee80211_ioctl_siwencode(struct net_device *dev,
 862                                      struct iw_request_info *info,
 863                                      struct iw_point *erq, char *keybuf)
 864 {
 865         struct ieee80211_sub_if_data *sdata;
 866         int idx, i, alg = ALG_WEP;
 867         u8 bcaddr[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 868         int remove = 0;
 869
 870         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 871
 872         idx = erq->flags & IW_ENCODE_INDEX;
 873         if (idx == 0) {
 874                 if (sdata->default_key)
 875                         for (i = 0; i < NUM_DEFAULT_KEYS; i++) {
 876                                 if (sdata->default_key == sdata->keys[i]) {
 877                                         idx = i;
 878                                         break;
 879                                 }
 880                         }
 881         } else if (idx < 1 || idx > 4)
 882                 return -EINVAL;
 883         else
 884                 idx--;
 885
 886         if (erq->flags & IW_ENCODE_DISABLED)
 887                 remove = 1;
 888         else if (erq->length == 0) {
 889                 /* No key data - just set the default TX key index */
 890                 ieee80211_set_default_key(sdata, idx);
 891                 return 0;
 892         }
 893
 894         return ieee80211_set_encryption(
 895                 dev, bcaddr,
 896                 idx, alg, remove,
 897                 !sdata->default_key,
 898                 keybuf, erq->length);
 899 }
 900
 901
 902 static int ieee80211_ioctl_giwencode(struct net_device *dev,
 903                                      struct iw_request_info *info,
 904                                      struct iw_point *erq, char *key)
 905 {
 906         struct ieee80211_sub_if_data *sdata;
 907         int idx, i;
 908
 909         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 910
 911         idx = erq->flags & IW_ENCODE_INDEX;
 912         if (idx < 1 || idx > 4) {
 913                 idx = -1;
 914                 if (!sdata->default_key)
 915                         idx = 0;
 916                 else for (i = 0; i < NUM_DEFAULT_KEYS; i++) {
 917                         if (sdata->default_key == sdata->keys[i]) {
 918                                 idx = i;
 919                                 break;
 920                         }
 921                 }
 922                 if (idx < 0)
 923                         return -EINVAL;
 924         } else
 925                 idx--;
 926
 927         erq->flags = idx + 1;
 928
 929         if (!sdata->keys[idx]) {
 930                 erq->length = 0;
 931                 erq->flags |= IW_ENCODE_DISABLED;
 932                 return 0;
 933         }
 934
 935         memcpy(key, sdata->keys[idx]->conf.key,
 936                min_t(int, erq->length, sdata->keys[idx]->conf.keylen));
 937         erq->length = sdata->keys[idx]->conf.keylen;
 938         erq->flags |= IW_ENCODE_ENABLED;
 939
 940         return 0;
 941 }
 942
 943 static int ieee80211_ioctl_siwauth(struct net_device *dev,
 944                                    struct iw_request_info *info,
 945                                    struct iw_param *data, char *extra)
 946 {
 947         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 948         int ret = 0;
 949
 950         switch (data->flags & IW_AUTH_INDEX) {
 951         case IW_AUTH_WPA_VERSION:
 952         case IW_AUTH_CIPHER_PAIRWISE:
 953         case IW_AUTH_CIPHER_GROUP:
 954         case IW_AUTH_WPA_ENABLED:
 955         case IW_AUTH_RX_UNENCRYPTED_EAPOL:
 956         case IW_AUTH_KEY_MGMT:
 957                 break;
 958         case IW_AUTH_DROP_UNENCRYPTED:
 959                 sdata->drop_unencrypted = !!data->value;
 960                 break;
 961         case IW_AUTH_PRIVACY_INVOKED:
 962                 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
 963                         ret = -EINVAL;
 964                 else {
 965                         sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
 966                         /*
 967                          * Privacy invoked by wpa_supplicant, store the
 968                          * value and allow associating to a protected
 969                          * network without having a key up front.
 970                          */
 971                         if (data->value)
 972                                 sdata->u.sta.flags |=
 973                                         IEEE80211_STA_PRIVACY_INVOKED;
 974                 }
 975                 break;
 976         case IW_AUTH_80211_AUTH_ALG:
 977                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
 978                     sdata->vif.type == IEEE80211_IF_TYPE_IBSS)
 979                         sdata->u.sta.auth_algs = data->value;
 980                 else
 981                         ret = -EOPNOTSUPP;
 982                 break;
 983         default:
 984                 ret = -EOPNOTSUPP;
 985                 break;
 986         }
 987         return ret;
 988 }
 989
 990 /* Get wireless statistics.  Called by /proc/net/wireless and by SIOCGIWSTATS */
 991 static struct iw_statistics *ieee80211_get_wireless_stats(struct net_device *dev)
 992 {
 993         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 994         struct iw_statistics *wstats = &local->wstats;
 995         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 996         struct sta_info *sta = NULL;
 997
 998         rcu_read_lock();
 999
1000         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
1001             sdata->vif.type == IEEE80211_IF_TYPE_IBSS)
1002                 sta = sta_info_get(local, sdata->u.sta.bssid);
1003         if (!sta) {
1004                 wstats->discard.fragment = 0;
1005                 wstats->discard.misc = 0;
1006                 wstats->qual.qual = 0;
1007                 wstats->qual.level = 0;
1008                 wstats->qual.noise = 0;
1009                 wstats->qual.updated = IW_QUAL_ALL_INVALID;
1010         } else {
1011                 wstats->qual.level = sta->last_signal;
1012                 wstats->qual.qual = sta->last_qual;
1013                 wstats->qual.noise = sta->last_noise;
1014                 wstats->qual.updated = local->wstats_flags;
1015         }
1016
1017         rcu_read_unlock();
1018
1019         return wstats;
1020 }
1021
1022 static int ieee80211_ioctl_giwauth(struct net_device *dev,
1023                                    struct iw_request_info *info,
1024                                    struct iw_param *data, char *extra)
1025 {
1026         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1027         int ret = 0;
1028
1029         switch (data->flags & IW_AUTH_INDEX) {
1030         case IW_AUTH_80211_AUTH_ALG:
1031                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
1032                     sdata->vif.type == IEEE80211_IF_TYPE_IBSS)
1033                         data->value = sdata->u.sta.auth_algs;
1034                 else
1035                         ret = -EOPNOTSUPP;
1036                 break;
1037         default:
1038                 ret = -EOPNOTSUPP;
1039                 break;
1040         }
1041         return ret;
1042 }
1043
1044
1045 static int ieee80211_ioctl_siwencodeext(struct net_device *dev,
1046                                         struct iw_request_info *info,
1047                                         struct iw_point *erq, char *extra)
1048 {
1049         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1050         struct iw_encode_ext *ext = (struct iw_encode_ext *) extra;
1051         int uninitialized_var(alg), idx, i, remove = 0;
1052
1053         switch (ext->alg) {
1054         case IW_ENCODE_ALG_NONE:
1055                 remove = 1;
1056                 break;
1057         case IW_ENCODE_ALG_WEP:
1058                 alg = ALG_WEP;
1059                 break;
1060         case IW_ENCODE_ALG_TKIP:
1061                 alg = ALG_TKIP;
1062                 break;
1063         case IW_ENCODE_ALG_CCMP:
1064                 alg = ALG_CCMP;
1065                 break;
1066         default:
1067                 return -EOPNOTSUPP;
1068         }
1069
1070         if (erq->flags & IW_ENCODE_DISABLED)
1071                 remove = 1;
1072
1073         idx = erq->flags & IW_ENCODE_INDEX;
1074         if (idx < 1 || idx > 4) {
1075                 idx = -1;
1076                 if (!sdata->default_key)
1077                         idx = 0;
1078                 else for (i = 0; i < NUM_DEFAULT_KEYS; i++) {
1079                         if (sdata->default_key == sdata->keys[i]) {
1080                                 idx = i;
1081                                 break;
1082                         }
1083                 }
1084                 if (idx < 0)
1085                         return -EINVAL;
1086         } else
1087                 idx--;
1088
1089         return ieee80211_set_encryption(dev, ext->addr.sa_data, idx, alg,
1090                                         remove,
1091                                         ext->ext_flags &
1092                                         IW_ENCODE_EXT_SET_TX_KEY,
1093                                         ext->key, ext->key_len);
1094 }
1095
1096
1097 /* Structures to export the Wireless Handlers */
1098
1099 static const iw_handler ieee80211_handler[] =
1100 {
1101         (iw_handler) NULL,                              /* SIOCSIWCOMMIT */
1102         (iw_handler) ieee80211_ioctl_giwname,           /* SIOCGIWNAME */
1103         (iw_handler) NULL,                              /* SIOCSIWNWID */
1104         (iw_handler) NULL,                              /* SIOCGIWNWID */
1105         (iw_handler) ieee80211_ioctl_siwfreq,           /* SIOCSIWFREQ */
1106         (iw_handler) ieee80211_ioctl_giwfreq,           /* SIOCGIWFREQ */
1107         (iw_handler) ieee80211_ioctl_siwmode,           /* SIOCSIWMODE */
1108         (iw_handler) ieee80211_ioctl_giwmode,           /* SIOCGIWMODE */
1109         (iw_handler) NULL,                              /* SIOCSIWSENS */
1110         (iw_handler) NULL,                              /* SIOCGIWSENS */
1111         (iw_handler) NULL /* not used */,               /* SIOCSIWRANGE */
1112         (iw_handler) ieee80211_ioctl_giwrange,          /* SIOCGIWRANGE */
1113         (iw_handler) NULL /* not used */,               /* SIOCSIWPRIV */
1114         (iw_handler) NULL /* kernel code */,            /* SIOCGIWPRIV */
1115         (iw_handler) NULL /* not used */,               /* SIOCSIWSTATS */
1116         (iw_handler) NULL /* kernel code */,            /* SIOCGIWSTATS */
1117         (iw_handler) NULL,                              /* SIOCSIWSPY */
1118         (iw_handler) NULL,                              /* SIOCGIWSPY */
1119         (iw_handler) NULL,                              /* SIOCSIWTHRSPY */
1120         (iw_handler) NULL,                              /* SIOCGIWTHRSPY */
1121         (iw_handler) ieee80211_ioctl_siwap,             /* SIOCSIWAP */
1122         (iw_handler) ieee80211_ioctl_giwap,             /* SIOCGIWAP */
1123         (iw_handler) ieee80211_ioctl_siwmlme,           /* SIOCSIWMLME */
1124         (iw_handler) NULL,                              /* SIOCGIWAPLIST */
1125         (iw_handler) ieee80211_ioctl_siwscan,           /* SIOCSIWSCAN */
1126         (iw_handler) ieee80211_ioctl_giwscan,           /* SIOCGIWSCAN */
1127         (iw_handler) ieee80211_ioctl_siwessid,          /* SIOCSIWESSID */
1128         (iw_handler) ieee80211_ioctl_giwessid,          /* SIOCGIWESSID */
1129         (iw_handler) NULL,                              /* SIOCSIWNICKN */
1130         (iw_handler) NULL,                              /* SIOCGIWNICKN */
1131         (iw_handler) NULL,                              /* -- hole -- */
1132         (iw_handler) NULL,                              /* -- hole -- */
1133         (iw_handler) ieee80211_ioctl_siwrate,           /* SIOCSIWRATE */
1134         (iw_handler) ieee80211_ioctl_giwrate,           /* SIOCGIWRATE */
1135         (iw_handler) ieee80211_ioctl_siwrts,            /* SIOCSIWRTS */
1136         (iw_handler) ieee80211_ioctl_giwrts,            /* SIOCGIWRTS */
1137         (iw_handler) ieee80211_ioctl_siwfrag,           /* SIOCSIWFRAG */
1138         (iw_handler) ieee80211_ioctl_giwfrag,           /* SIOCGIWFRAG */
1139         (iw_handler) ieee80211_ioctl_siwtxpower,        /* SIOCSIWTXPOW */
1140         (iw_handler) ieee80211_ioctl_giwtxpower,        /* SIOCGIWTXPOW */
1141         (iw_handler) ieee80211_ioctl_siwretry,          /* SIOCSIWRETRY */
1142         (iw_handler) ieee80211_ioctl_giwretry,          /* SIOCGIWRETRY */
1143         (iw_handler) ieee80211_ioctl_siwencode,         /* SIOCSIWENCODE */
1144         (iw_handler) ieee80211_ioctl_giwencode,         /* SIOCGIWENCODE */
1145         (iw_handler) NULL,                              /* SIOCSIWPOWER */
1146         (iw_handler) NULL,                              /* SIOCGIWPOWER */
1147         (iw_handler) NULL,                              /* -- hole -- */
1148         (iw_handler) NULL,                              /* -- hole -- */
1149         (iw_handler) ieee80211_ioctl_siwgenie,          /* SIOCSIWGENIE */
1150         (iw_handler) NULL,                              /* SIOCGIWGENIE */
1151         (iw_handler) ieee80211_ioctl_siwauth,           /* SIOCSIWAUTH */
1152         (iw_handler) ieee80211_ioctl_giwauth,           /* SIOCGIWAUTH */
1153         (iw_handler) ieee80211_ioctl_siwencodeext,      /* SIOCSIWENCODEEXT */
1154         (iw_handler) NULL,                              /* SIOCGIWENCODEEXT */
1155         (iw_handler) NULL,                              /* SIOCSIWPMKSA */
1156         (iw_handler) NULL,                              /* -- hole -- */
1157 };
1158
1159 const struct iw_handler_def ieee80211_iw_handler_def =
1160 {
1161         .num_standard   = ARRAY_SIZE(ieee80211_handler),
1162         .standard       = (iw_handler *) ieee80211_handler,
1163         .get_wireless_stats = ieee80211_get_wireless_stats,
1164 };