net/mac80211/wext.c

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