net/mac80211/wext.c

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