net/wireless/wext-compat.c

   1 /*
   2  * cfg80211 - wext compat code
   3  *
   4  * This is temporary code until all wireless functionality is migrated
   5  * into cfg80211, when that happens all the exports here go away and
   6  * we directly assign the wireless handlers of wireless interfaces.
   7  *
   8  * Copyright 2008-2009  Johannes Berg <johannes@sipsolutions.net>
   9  */
  10
  11 #include <linux/wireless.h>
  12 #include <linux/nl80211.h>
  13 #include <linux/if_arp.h>
  14 #include <linux/etherdevice.h>
  15 #include <net/iw_handler.h>
  16 #include <net/cfg80211.h>
  17 #include "core.h"
  18
  19 int cfg80211_wext_giwname(struct net_device *dev,
  20                           struct iw_request_info *info,
  21                           char *name, char *extra)
  22 {
  23         struct wireless_dev *wdev = dev->ieee80211_ptr;
  24         struct ieee80211_supported_band *sband;
  25         bool is_ht = false, is_a = false, is_b = false, is_g = false;
  26
  27         if (!wdev)
  28                 return -EOPNOTSUPP;
  29
  30         sband = wdev->wiphy->bands[IEEE80211_BAND_5GHZ];
  31         if (sband) {
  32                 is_a = true;
  33                 is_ht |= sband->ht_cap.ht_supported;
  34         }
  35
  36         sband = wdev->wiphy->bands[IEEE80211_BAND_2GHZ];
  37         if (sband) {
  38                 int i;
  39                 /* Check for mandatory rates */
  40                 for (i = 0; i < sband->n_bitrates; i++) {
  41                         if (sband->bitrates[i].bitrate == 10)
  42                                 is_b = true;
  43                         if (sband->bitrates[i].bitrate == 60)
  44                                 is_g = true;
  45                 }
  46                 is_ht |= sband->ht_cap.ht_supported;
  47         }
  48
  49         strcpy(name, "IEEE 802.11");
  50         if (is_a)
  51                 strcat(name, "a");
  52         if (is_b)
  53                 strcat(name, "b");
  54         if (is_g)
  55                 strcat(name, "g");
  56         if (is_ht)
  57                 strcat(name, "n");
  58
  59         return 0;
  60 }
  61 EXPORT_SYMBOL_GPL(cfg80211_wext_giwname);
  62
  63 int cfg80211_wext_siwmode(struct net_device *dev, struct iw_request_info *info,
  64                           u32 *mode, char *extra)
  65 {
  66         struct wireless_dev *wdev = dev->ieee80211_ptr;
  67         struct cfg80211_registered_device *rdev;
  68         struct vif_params vifparams;
  69         enum nl80211_iftype type;
  70         int ret;
  71
  72         if (!wdev)
  73                 return -EOPNOTSUPP;
  74
  75         rdev = wiphy_to_dev(wdev->wiphy);
  76
  77         if (!rdev->ops->change_virtual_intf)
  78                 return -EOPNOTSUPP;
  79
  80         /* don't support changing VLANs, you just re-create them */
  81         if (wdev->iftype == NL80211_IFTYPE_AP_VLAN)
  82                 return -EOPNOTSUPP;
  83
  84         switch (*mode) {
  85         case IW_MODE_INFRA:
  86                 type = NL80211_IFTYPE_STATION;
  87                 break;
  88         case IW_MODE_ADHOC:
  89                 type = NL80211_IFTYPE_ADHOC;
  90                 break;
  91         case IW_MODE_REPEAT:
  92                 type = NL80211_IFTYPE_WDS;
  93                 break;
  94         case IW_MODE_MONITOR:
  95                 type = NL80211_IFTYPE_MONITOR;
  96                 break;
  97         default:
  98                 return -EINVAL;
  99         }
 100
 101         if (type == wdev->iftype)
 102                 return 0;
 103
 104         memset(&vifparams, 0, sizeof(vifparams));
 105
 106         ret = rdev->ops->change_virtual_intf(wdev->wiphy, dev->ifindex, type,
 107                                              NULL, &vifparams);
 108         WARN_ON(!ret && wdev->iftype != type);
 109
 110         return ret;
 111 }
 112 EXPORT_SYMBOL_GPL(cfg80211_wext_siwmode);
 113
 114 int cfg80211_wext_giwmode(struct net_device *dev, struct iw_request_info *info,
 115                           u32 *mode, char *extra)
 116 {
 117         struct wireless_dev *wdev = dev->ieee80211_ptr;
 118
 119         if (!wdev)
 120                 return -EOPNOTSUPP;
 121
 122         switch (wdev->iftype) {
 123         case NL80211_IFTYPE_AP:
 124                 *mode = IW_MODE_MASTER;
 125                 break;
 126         case NL80211_IFTYPE_STATION:
 127                 *mode = IW_MODE_INFRA;
 128                 break;
 129         case NL80211_IFTYPE_ADHOC:
 130                 *mode = IW_MODE_ADHOC;
 131                 break;
 132         case NL80211_IFTYPE_MONITOR:
 133                 *mode = IW_MODE_MONITOR;
 134                 break;
 135         case NL80211_IFTYPE_WDS:
 136                 *mode = IW_MODE_REPEAT;
 137                 break;
 138         case NL80211_IFTYPE_AP_VLAN:
 139                 *mode = IW_MODE_SECOND;         /* FIXME */
 140                 break;
 141         default:
 142                 *mode = IW_MODE_AUTO;
 143                 break;
 144         }
 145         return 0;
 146 }
 147 EXPORT_SYMBOL_GPL(cfg80211_wext_giwmode);
 148
 149
 150 int cfg80211_wext_giwrange(struct net_device *dev,
 151                            struct iw_request_info *info,
 152                            struct iw_point *data, char *extra)
 153 {
 154         struct wireless_dev *wdev = dev->ieee80211_ptr;
 155         struct iw_range *range = (struct iw_range *) extra;
 156         enum ieee80211_band band;
 157         int c = 0;
 158
 159         if (!wdev)
 160                 return -EOPNOTSUPP;
 161
 162         data->length = sizeof(struct iw_range);
 163         memset(range, 0, sizeof(struct iw_range));
 164
 165         range->we_version_compiled = WIRELESS_EXT;
 166         range->we_version_source = 21;
 167         range->retry_capa = IW_RETRY_LIMIT;
 168         range->retry_flags = IW_RETRY_LIMIT;
 169         range->min_retry = 0;
 170         range->max_retry = 255;
 171         range->min_rts = 0;
 172         range->max_rts = 2347;
 173         range->min_frag = 256;
 174         range->max_frag = 2346;
 175
 176         range->encoding_size[0] = 5;
 177         range->encoding_size[1] = 13;
 178         range->num_encoding_sizes = 2;
 179         range->max_encoding_tokens = 4;
 180
 181         range->max_qual.updated = IW_QUAL_NOISE_INVALID;
 182
 183         switch (wdev->wiphy->signal_type) {
 184         case CFG80211_SIGNAL_TYPE_NONE:
 185                 break;
 186         case CFG80211_SIGNAL_TYPE_MBM:
 187                 range->max_qual.level = -110;
 188                 range->max_qual.qual = 70;
 189                 range->avg_qual.qual = 35;
 190                 range->max_qual.updated |= IW_QUAL_DBM;
 191                 range->max_qual.updated |= IW_QUAL_QUAL_UPDATED;
 192                 range->max_qual.updated |= IW_QUAL_LEVEL_UPDATED;
 193                 break;
 194         case CFG80211_SIGNAL_TYPE_UNSPEC:
 195                 range->max_qual.level = 100;
 196                 range->max_qual.qual = 100;
 197                 range->avg_qual.qual = 50;
 198                 range->max_qual.updated |= IW_QUAL_QUAL_UPDATED;
 199                 range->max_qual.updated |= IW_QUAL_LEVEL_UPDATED;
 200                 break;
 201         }
 202
 203         range->avg_qual.level = range->max_qual.level / 2;
 204         range->avg_qual.noise = range->max_qual.noise / 2;
 205         range->avg_qual.updated = range->max_qual.updated;
 206
 207         range->enc_capa = IW_ENC_CAPA_WPA | IW_ENC_CAPA_WPA2 |
 208                           IW_ENC_CAPA_CIPHER_TKIP | IW_ENC_CAPA_CIPHER_CCMP;
 209
 210         for (band = 0; band < IEEE80211_NUM_BANDS; band ++) {
 211                 int i;
 212                 struct ieee80211_supported_band *sband;
 213
 214                 sband = wdev->wiphy->bands[band];
 215
 216                 if (!sband)
 217                         continue;
 218
 219                 for (i = 0; i < sband->n_channels && c < IW_MAX_FREQUENCIES; i++) {
 220                         struct ieee80211_channel *chan = &sband->channels[i];
 221
 222                         if (!(chan->flags & IEEE80211_CHAN_DISABLED)) {
 223                                 range->freq[c].i =
 224                                         ieee80211_frequency_to_channel(
 225                                                 chan->center_freq);
 226                                 range->freq[c].m = chan->center_freq;
 227                                 range->freq[c].e = 6;
 228                                 c++;
 229                         }
 230                 }
 231         }
 232         range->num_channels = c;
 233         range->num_frequency = c;
 234
 235         IW_EVENT_CAPA_SET_KERNEL(range->event_capa);
 236         IW_EVENT_CAPA_SET(range->event_capa, SIOCGIWAP);
 237         IW_EVENT_CAPA_SET(range->event_capa, SIOCGIWSCAN);
 238
 239         range->scan_capa |= IW_SCAN_CAPA_ESSID;
 240
 241         return 0;
 242 }
 243 EXPORT_SYMBOL_GPL(cfg80211_wext_giwrange);
 244
 245 int cfg80211_wext_siwmlme(struct net_device *dev,
 246                           struct iw_request_info *info,
 247                           struct iw_point *data, char *extra)
 248 {
 249         struct wireless_dev *wdev = dev->ieee80211_ptr;
 250         struct iw_mlme *mlme = (struct iw_mlme *)extra;
 251         struct cfg80211_registered_device *rdev;
 252         union {
 253                 struct cfg80211_disassoc_request disassoc;
 254                 struct cfg80211_deauth_request deauth;
 255         } cmd;
 256
 257         if (!wdev)
 258                 return -EOPNOTSUPP;
 259
 260         rdev = wiphy_to_dev(wdev->wiphy);
 261
 262         if (wdev->iftype != NL80211_IFTYPE_STATION)
 263                 return -EINVAL;
 264
 265         if (mlme->addr.sa_family != ARPHRD_ETHER)
 266                 return -EINVAL;
 267
 268         memset(&cmd, 0, sizeof(cmd));
 269
 270         switch (mlme->cmd) {
 271         case IW_MLME_DEAUTH:
 272                 if (!rdev->ops->deauth)
 273                         return -EOPNOTSUPP;
 274                 cmd.deauth.peer_addr = mlme->addr.sa_data;
 275                 cmd.deauth.reason_code = mlme->reason_code;
 276                 return rdev->ops->deauth(wdev->wiphy, dev, &cmd.deauth);
 277         case IW_MLME_DISASSOC:
 278                 if (!rdev->ops->disassoc)
 279                         return -EOPNOTSUPP;
 280                 cmd.disassoc.peer_addr = mlme->addr.sa_data;
 281                 cmd.disassoc.reason_code = mlme->reason_code;
 282                 return rdev->ops->disassoc(wdev->wiphy, dev, &cmd.disassoc);
 283         default:
 284                 return -EOPNOTSUPP;
 285         }
 286 }
 287 EXPORT_SYMBOL_GPL(cfg80211_wext_siwmlme);
 288
 289
 290 /**
 291  * cfg80211_wext_freq - get wext frequency for non-"auto"
 292  * @wiphy: the wiphy
 293  * @freq: the wext freq encoding
 294  *
 295  * Returns a channel, %NULL for auto, or an ERR_PTR for errors!
 296  */
 297 struct ieee80211_channel *cfg80211_wext_freq(struct wiphy *wiphy,
 298                                              struct iw_freq *freq)
 299 {
 300         struct ieee80211_channel *chan;
 301         int f;
 302
 303         /*
 304          * Parse frequency - return NULL for auto and
 305          * -EINVAL for impossible things.
 306          */
 307         if (freq->e == 0) {
 308                 if (freq->m < 0)
 309                         return NULL;
 310                 f = ieee80211_channel_to_frequency(freq->m);
 311         } else {
 312                 int i, div = 1000000;
 313                 for (i = 0; i < freq->e; i++)
 314                         div /= 10;
 315                 if (div <= 0)
 316                         return ERR_PTR(-EINVAL);
 317                 f = freq->m / div;
 318         }
 319
 320         /*
 321          * Look up channel struct and return -EINVAL when
 322          * it cannot be found.
 323          */
 324         chan = ieee80211_get_channel(wiphy, f);
 325         if (!chan)
 326                 return ERR_PTR(-EINVAL);
 327         return chan;
 328 }
 329 EXPORT_SYMBOL_GPL(cfg80211_wext_freq);
 330
 331 int cfg80211_wext_siwrts(struct net_device *dev,
 332                          struct iw_request_info *info,
 333                          struct iw_param *rts, char *extra)
 334 {
 335         struct wireless_dev *wdev = dev->ieee80211_ptr;
 336         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 337         u32 orts = wdev->wiphy->rts_threshold;
 338         int err;
 339
 340         if (rts->disabled || !rts->fixed)
 341                 wdev->wiphy->rts_threshold = (u32) -1;
 342         else if (rts->value < 0)
 343                 return -EINVAL;
 344         else
 345                 wdev->wiphy->rts_threshold = rts->value;
 346
 347         err = rdev->ops->set_wiphy_params(wdev->wiphy,
 348                                           WIPHY_PARAM_RTS_THRESHOLD);
 349         if (err)
 350                 wdev->wiphy->rts_threshold = orts;
 351
 352         return err;
 353 }
 354 EXPORT_SYMBOL_GPL(cfg80211_wext_siwrts);
 355
 356 int cfg80211_wext_giwrts(struct net_device *dev,
 357                          struct iw_request_info *info,
 358                          struct iw_param *rts, char *extra)
 359 {
 360         struct wireless_dev *wdev = dev->ieee80211_ptr;
 361
 362         rts->value = wdev->wiphy->rts_threshold;
 363         rts->disabled = rts->value == (u32) -1;
 364         rts->fixed = 1;
 365
 366         return 0;
 367 }
 368 EXPORT_SYMBOL_GPL(cfg80211_wext_giwrts);
 369
 370 int cfg80211_wext_siwfrag(struct net_device *dev,
 371                           struct iw_request_info *info,
 372                           struct iw_param *frag, char *extra)
 373 {
 374         struct wireless_dev *wdev = dev->ieee80211_ptr;
 375         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 376         u32 ofrag = wdev->wiphy->frag_threshold;
 377         int err;
 378
 379         if (frag->disabled || !frag->fixed)
 380                 wdev->wiphy->frag_threshold = (u32) -1;
 381         else if (frag->value < 256)
 382                 return -EINVAL;
 383         else {
 384                 /* Fragment length must be even, so strip LSB. */
 385                 wdev->wiphy->frag_threshold = frag->value & ~0x1;
 386         }
 387
 388         err = rdev->ops->set_wiphy_params(wdev->wiphy,
 389                                           WIPHY_PARAM_FRAG_THRESHOLD);
 390         if (err)
 391                 wdev->wiphy->frag_threshold = ofrag;
 392
 393         return err;
 394 }
 395 EXPORT_SYMBOL_GPL(cfg80211_wext_siwfrag);
 396
 397 int cfg80211_wext_giwfrag(struct net_device *dev,
 398                           struct iw_request_info *info,
 399                           struct iw_param *frag, char *extra)
 400 {
 401         struct wireless_dev *wdev = dev->ieee80211_ptr;
 402
 403         frag->value = wdev->wiphy->frag_threshold;
 404         frag->disabled = frag->value == (u32) -1;
 405         frag->fixed = 1;
 406
 407         return 0;
 408 }
 409 EXPORT_SYMBOL_GPL(cfg80211_wext_giwfrag);
 410
 411 int cfg80211_wext_siwretry(struct net_device *dev,
 412                            struct iw_request_info *info,
 413                            struct iw_param *retry, char *extra)
 414 {
 415         struct wireless_dev *wdev = dev->ieee80211_ptr;
 416         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 417         u32 changed = 0;
 418         u8 olong = wdev->wiphy->retry_long;
 419         u8 oshort = wdev->wiphy->retry_short;
 420         int err;
 421
 422         if (retry->disabled ||
 423             (retry->flags & IW_RETRY_TYPE) != IW_RETRY_LIMIT)
 424                 return -EINVAL;
 425
 426         if (retry->flags & IW_RETRY_LONG) {
 427                 wdev->wiphy->retry_long = retry->value;
 428                 changed |= WIPHY_PARAM_RETRY_LONG;
 429         } else if (retry->flags & IW_RETRY_SHORT) {
 430                 wdev->wiphy->retry_short = retry->value;
 431                 changed |= WIPHY_PARAM_RETRY_SHORT;
 432         } else {
 433                 wdev->wiphy->retry_short = retry->value;
 434                 wdev->wiphy->retry_long = retry->value;
 435                 changed |= WIPHY_PARAM_RETRY_LONG;
 436                 changed |= WIPHY_PARAM_RETRY_SHORT;
 437         }
 438
 439         if (!changed)
 440                 return 0;
 441
 442         err = rdev->ops->set_wiphy_params(wdev->wiphy, changed);
 443         if (err) {
 444                 wdev->wiphy->retry_short = oshort;
 445                 wdev->wiphy->retry_long = olong;
 446         }
 447
 448         return err;
 449 }
 450 EXPORT_SYMBOL_GPL(cfg80211_wext_siwretry);
 451
 452 int cfg80211_wext_giwretry(struct net_device *dev,
 453                            struct iw_request_info *info,
 454                            struct iw_param *retry, char *extra)
 455 {
 456         struct wireless_dev *wdev = dev->ieee80211_ptr;
 457
 458         retry->disabled = 0;
 459
 460         if (retry->flags == 0 || (retry->flags & IW_RETRY_SHORT)) {
 461                 /*
 462                  * First return short value, iwconfig will ask long value
 463                  * later if needed
 464                  */
 465                 retry->flags |= IW_RETRY_LIMIT;
 466                 retry->value = wdev->wiphy->retry_short;
 467                 if (wdev->wiphy->retry_long != wdev->wiphy->retry_short)
 468                         retry->flags |= IW_RETRY_LONG;
 469
 470                 return 0;
 471         }
 472
 473         if (retry->flags & IW_RETRY_LONG) {
 474                 retry->flags = IW_RETRY_LIMIT | IW_RETRY_LONG;
 475                 retry->value = wdev->wiphy->retry_long;
 476         }
 477
 478         return 0;
 479 }
 480 EXPORT_SYMBOL_GPL(cfg80211_wext_giwretry);
 481
 482 static int cfg80211_set_encryption(struct cfg80211_registered_device *rdev,
 483                                    struct net_device *dev, const u8 *addr,
 484                                    bool remove, bool tx_key, int idx,
 485                                    struct key_params *params)
 486 {
 487         struct wireless_dev *wdev = dev->ieee80211_ptr;
 488         int err;
 489
 490         if (params->cipher == WLAN_CIPHER_SUITE_AES_CMAC) {
 491                 if (!rdev->ops->set_default_mgmt_key)
 492                         return -EOPNOTSUPP;
 493
 494                 if (idx < 4 || idx > 5)
 495                         return -EINVAL;
 496         } else if (idx < 0 || idx > 3)
 497                 return -EINVAL;
 498
 499         if (remove) {
 500                 err = rdev->ops->del_key(&rdev->wiphy, dev, idx, addr);
 501                 if (!err) {
 502                         if (idx == wdev->wext.default_key)
 503                                 wdev->wext.default_key = -1;
 504                         else if (idx == wdev->wext.default_mgmt_key)
 505                                 wdev->wext.default_mgmt_key = -1;
 506                 }
 507                 return err;
 508         } else {
 509                 if (addr)
 510                         tx_key = false;
 511
 512                 if (cfg80211_validate_key_settings(params, idx, addr))
 513                         return -EINVAL;
 514
 515                 err = rdev->ops->add_key(&rdev->wiphy, dev, idx, addr, params);
 516                 if (err)
 517                         return err;
 518
 519                 if (tx_key || (!addr && wdev->wext.default_key == -1)) {
 520                         err = rdev->ops->set_default_key(&rdev->wiphy,
 521                                                          dev, idx);
 522                         if (!err)
 523                                 wdev->wext.default_key = idx;
 524                         return err;
 525                 }
 526
 527                 if (params->cipher == WLAN_CIPHER_SUITE_AES_CMAC &&
 528                     (tx_key || (!addr && wdev->wext.default_mgmt_key == -1))) {
 529                         err = rdev->ops->set_default_mgmt_key(&rdev->wiphy,
 530                                                               dev, idx);
 531                         if (!err)
 532                                 wdev->wext.default_mgmt_key = idx;
 533                         return err;
 534                 }
 535
 536                 return 0;
 537         }
 538 }
 539
 540 int cfg80211_wext_siwencode(struct net_device *dev,
 541                             struct iw_request_info *info,
 542                             struct iw_point *erq, char *keybuf)
 543 {
 544         struct wireless_dev *wdev = dev->ieee80211_ptr;
 545         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 546         int idx, err;
 547         bool remove = false;
 548         struct key_params params;
 549
 550         /* no use -- only MFP (set_default_mgmt_key) is optional */
 551         if (!rdev->ops->del_key ||
 552             !rdev->ops->add_key ||
 553             !rdev->ops->set_default_key)
 554                 return -EOPNOTSUPP;
 555
 556         idx = erq->flags & IW_ENCODE_INDEX;
 557         if (idx == 0) {
 558                 idx = wdev->wext.default_key;
 559                 if (idx < 0)
 560                         idx = 0;
 561         } else if (idx < 1 || idx > 4)
 562                 return -EINVAL;
 563         else
 564                 idx--;
 565
 566         if (erq->flags & IW_ENCODE_DISABLED)
 567                 remove = true;
 568         else if (erq->length == 0) {
 569                 /* No key data - just set the default TX key index */
 570                 err = rdev->ops->set_default_key(&rdev->wiphy, dev, idx);
 571                 if (!err)
 572                         wdev->wext.default_key = idx;
 573                 return err;
 574         }
 575
 576         memset(&params, 0, sizeof(params));
 577         params.key = keybuf;
 578         params.key_len = erq->length;
 579         if (erq->length == 5)
 580                 params.cipher = WLAN_CIPHER_SUITE_WEP40;
 581         else if (erq->length == 13)
 582                 params.cipher = WLAN_CIPHER_SUITE_WEP104;
 583         else if (!remove)
 584                 return -EINVAL;
 585
 586         return cfg80211_set_encryption(rdev, dev, NULL, remove,
 587                                        wdev->wext.default_key == -1,
 588                                        idx, &params);
 589 }
 590 EXPORT_SYMBOL_GPL(cfg80211_wext_siwencode);
 591
 592 int cfg80211_wext_siwencodeext(struct net_device *dev,
 593                                struct iw_request_info *info,
 594                                struct iw_point *erq, char *extra)
 595 {
 596         struct wireless_dev *wdev = dev->ieee80211_ptr;
 597         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 598         struct iw_encode_ext *ext = (struct iw_encode_ext *) extra;
 599         const u8 *addr;
 600         int idx;
 601         bool remove = false;
 602         struct key_params params;
 603         u32 cipher;
 604
 605         /* no use -- only MFP (set_default_mgmt_key) is optional */
 606         if (!rdev->ops->del_key ||
 607             !rdev->ops->add_key ||
 608             !rdev->ops->set_default_key)
 609                 return -EOPNOTSUPP;
 610
 611         switch (ext->alg) {
 612         case IW_ENCODE_ALG_NONE:
 613                 remove = true;
 614                 cipher = 0;
 615                 break;
 616         case IW_ENCODE_ALG_WEP:
 617                 if (ext->key_len == 5)
 618                         cipher = WLAN_CIPHER_SUITE_WEP40;
 619                 else if (ext->key_len == 13)
 620                         cipher = WLAN_CIPHER_SUITE_WEP104;
 621                 else
 622                         return -EINVAL;
 623                 break;
 624         case IW_ENCODE_ALG_TKIP:
 625                 cipher = WLAN_CIPHER_SUITE_TKIP;
 626                 break;
 627         case IW_ENCODE_ALG_CCMP:
 628                 cipher = WLAN_CIPHER_SUITE_CCMP;
 629                 break;
 630         case IW_ENCODE_ALG_AES_CMAC:
 631                 cipher = WLAN_CIPHER_SUITE_AES_CMAC;
 632                 break;
 633         default:
 634                 return -EOPNOTSUPP;
 635         }
 636
 637         if (erq->flags & IW_ENCODE_DISABLED)
 638                 remove = true;
 639
 640         idx = erq->flags & IW_ENCODE_INDEX;
 641         if (cipher == WLAN_CIPHER_SUITE_AES_CMAC) {
 642                 if (idx < 4 || idx > 5) {
 643                         idx = wdev->wext.default_mgmt_key;
 644                         if (idx < 0)
 645                                 return -EINVAL;
 646                 } else
 647                         idx--;
 648         } else {
 649                 if (idx < 1 || idx > 4) {
 650                         idx = wdev->wext.default_key;
 651                         if (idx < 0)
 652                                 return -EINVAL;
 653                 } else
 654                         idx--;
 655         }
 656
 657         addr = ext->addr.sa_data;
 658         if (is_broadcast_ether_addr(addr))
 659                 addr = NULL;
 660
 661         memset(&params, 0, sizeof(params));
 662         params.key = ext->key;
 663         params.key_len = ext->key_len;
 664         params.cipher = cipher;
 665
 666         return cfg80211_set_encryption(
 667                         rdev, dev, addr, remove,
 668                         ext->ext_flags & IW_ENCODE_EXT_SET_TX_KEY,
 669                         idx, &params);
 670 }
 671 EXPORT_SYMBOL_GPL(cfg80211_wext_siwencodeext);
 672
 673 struct giwencode_cookie {
 674         size_t buflen;
 675         char *keybuf;
 676 };
 677
 678 static void giwencode_get_key_cb(void *cookie, struct key_params *params)
 679 {
 680         struct giwencode_cookie *data = cookie;
 681
 682         if (!params->key) {
 683                 data->buflen = 0;
 684                 return;
 685         }
 686
 687         data->buflen = min_t(size_t, data->buflen, params->key_len);
 688         memcpy(data->keybuf, params->key, data->buflen);
 689 }
 690
 691 int cfg80211_wext_giwencode(struct net_device *dev,
 692                             struct iw_request_info *info,
 693                             struct iw_point *erq, char *keybuf)
 694 {
 695         struct wireless_dev *wdev = dev->ieee80211_ptr;
 696         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 697         int idx, err;
 698         struct giwencode_cookie data = {
 699                 .keybuf = keybuf,
 700                 .buflen = erq->length,
 701         };
 702
 703         if (!rdev->ops->get_key)
 704                 return -EOPNOTSUPP;
 705
 706         idx = erq->flags & IW_ENCODE_INDEX;
 707         if (idx == 0) {
 708                 idx = wdev->wext.default_key;
 709                 if (idx < 0)
 710                         idx = 0;
 711         } else if (idx < 1 || idx > 4)
 712                 return -EINVAL;
 713         else
 714                 idx--;
 715
 716         erq->flags = idx + 1;
 717
 718         err = rdev->ops->get_key(&rdev->wiphy, dev, idx, NULL, &data,
 719                                  giwencode_get_key_cb);
 720         if (!err) {
 721                 erq->length = data.buflen;
 722                 erq->flags |= IW_ENCODE_ENABLED;
 723                 return 0;
 724         }
 725
 726         if (err == -ENOENT) {
 727                 erq->flags |= IW_ENCODE_DISABLED;
 728                 erq->length = 0;
 729                 return 0;
 730         }
 731
 732         return err;
 733 }
 734 EXPORT_SYMBOL_GPL(cfg80211_wext_giwencode);