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