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       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 <net/iw_handler.h>
  15 #include <net/cfg80211.h>
  16 #include "core.h"
  17
  18 int cfg80211_wext_giwname(struct net_device *dev,
  19                           struct iw_request_info *info,
  20                           char *name, char *extra)
  21 {
  22         struct wireless_dev *wdev = dev->ieee80211_ptr;
  23         struct ieee80211_supported_band *sband;
  24         bool is_ht = false, is_a = false, is_b = false, is_g = false;
  25
  26         if (!wdev)
  27                 return -EOPNOTSUPP;
  28
  29         sband = wdev->wiphy->bands[IEEE80211_BAND_5GHZ];
  30         if (sband) {
  31                 is_a = true;
  32                 is_ht |= sband->ht_cap.ht_supported;
  33         }
  34
  35         sband = wdev->wiphy->bands[IEEE80211_BAND_2GHZ];
  36         if (sband) {
  37                 int i;
  38                 /* Check for mandatory rates */
  39                 for (i = 0; i < sband->n_bitrates; i++) {
  40                         if (sband->bitrates[i].bitrate == 10)
  41                                 is_b = true;
  42                         if (sband->bitrates[i].bitrate == 60)
  43                                 is_g = true;
  44                 }
  45                 is_ht |= sband->ht_cap.ht_supported;
  46         }
  47
  48         strcpy(name, "IEEE 802.11");
  49         if (is_a)
  50                 strcat(name, "a");
  51         if (is_b)
  52                 strcat(name, "b");
  53         if (is_g)
  54                 strcat(name, "g");
  55         if (is_ht)
  56                 strcat(name, "n");
  57
  58         return 0;
  59 }
  60 EXPORT_SYMBOL_GPL(cfg80211_wext_giwname);
  61
  62 int cfg80211_wext_siwmode(struct net_device *dev, struct iw_request_info *info,
  63                           u32 *mode, char *extra)
  64 {
  65         struct wireless_dev *wdev = dev->ieee80211_ptr;
  66         struct cfg80211_registered_device *rdev;
  67         struct vif_params vifparams;
  68         enum nl80211_iftype type;
  69         int ret;
  70
  71         if (!wdev)
  72                 return -EOPNOTSUPP;
  73
  74         rdev = wiphy_to_dev(wdev->wiphy);
  75
  76         if (!rdev->ops->change_virtual_intf)
  77                 return -EOPNOTSUPP;
  78
  79         /* don't support changing VLANs, you just re-create them */
  80         if (wdev->iftype == NL80211_IFTYPE_AP_VLAN)
  81                 return -EOPNOTSUPP;
  82
  83         switch (*mode) {
  84         case IW_MODE_INFRA:
  85                 type = NL80211_IFTYPE_STATION;
  86                 break;
  87         case IW_MODE_ADHOC:
  88                 type = NL80211_IFTYPE_ADHOC;
  89                 break;
  90         case IW_MODE_REPEAT:
  91                 type = NL80211_IFTYPE_WDS;
  92                 break;
  93         case IW_MODE_MONITOR:
  94                 type = NL80211_IFTYPE_MONITOR;
  95                 break;
  96         default:
  97                 return -EINVAL;
  98         }
  99
 100         if (type == wdev->iftype)
 101                 return 0;
 102
 103         memset(&vifparams, 0, sizeof(vifparams));
 104
 105         ret = rdev->ops->change_virtual_intf(wdev->wiphy, dev->ifindex, type,
 106                                              NULL, &vifparams);
 107         WARN_ON(!ret && wdev->iftype != type);
 108
 109         return ret;
 110 }
 111 EXPORT_SYMBOL_GPL(cfg80211_wext_siwmode);
 112
 113 int cfg80211_wext_giwmode(struct net_device *dev, struct iw_request_info *info,
 114                           u32 *mode, char *extra)
 115 {
 116         struct wireless_dev *wdev = dev->ieee80211_ptr;
 117
 118         if (!wdev)
 119                 return -EOPNOTSUPP;
 120
 121         switch (wdev->iftype) {
 122         case NL80211_IFTYPE_AP:
 123                 *mode = IW_MODE_MASTER;
 124                 break;
 125         case NL80211_IFTYPE_STATION:
 126                 *mode = IW_MODE_INFRA;
 127                 break;
 128         case NL80211_IFTYPE_ADHOC:
 129                 *mode = IW_MODE_ADHOC;
 130                 break;
 131         case NL80211_IFTYPE_MONITOR:
 132                 *mode = IW_MODE_MONITOR;
 133                 break;
 134         case NL80211_IFTYPE_WDS:
 135                 *mode = IW_MODE_REPEAT;
 136                 break;
 137         case NL80211_IFTYPE_AP_VLAN:
 138                 *mode = IW_MODE_SECOND;         /* FIXME */
 139                 break;
 140         default:
 141                 *mode = IW_MODE_AUTO;
 142                 break;
 143         }
 144         return 0;
 145 }
 146 EXPORT_SYMBOL_GPL(cfg80211_wext_giwmode);
 147
 148
 149 int cfg80211_wext_giwrange(struct net_device *dev,
 150                            struct iw_request_info *info,
 151                            struct iw_point *data, char *extra)
 152 {
 153         struct wireless_dev *wdev = dev->ieee80211_ptr;
 154         struct iw_range *range = (struct iw_range *) extra;
 155         enum ieee80211_band band;
 156         int c = 0;
 157
 158         if (!wdev)
 159                 return -EOPNOTSUPP;
 160
 161         data->length = sizeof(struct iw_range);
 162         memset(range, 0, sizeof(struct iw_range));
 163
 164         range->we_version_compiled = WIRELESS_EXT;
 165         range->we_version_source = 21;
 166         range->retry_capa = IW_RETRY_LIMIT;
 167         range->retry_flags = IW_RETRY_LIMIT;
 168         range->min_retry = 0;
 169         range->max_retry = 255;
 170         range->min_rts = 0;
 171         range->max_rts = 2347;
 172         range->min_frag = 256;
 173         range->max_frag = 2346;
 174
 175         range->encoding_size[0] = 5;
 176         range->encoding_size[1] = 13;
 177         range->num_encoding_sizes = 2;
 178         range->max_encoding_tokens = 4;
 179
 180         range->max_qual.updated = IW_QUAL_NOISE_INVALID;
 181
 182         switch (wdev->wiphy->signal_type) {
 183         case CFG80211_SIGNAL_TYPE_NONE:
 184                 break;
 185         case CFG80211_SIGNAL_TYPE_MBM:
 186                 range->max_qual.level = -110;
 187                 range->max_qual.qual = 70;
 188                 range->avg_qual.qual = 35;
 189                 range->max_qual.updated |= IW_QUAL_DBM;
 190                 range->max_qual.updated |= IW_QUAL_QUAL_UPDATED;
 191                 range->max_qual.updated |= IW_QUAL_LEVEL_UPDATED;
 192                 break;
 193         case CFG80211_SIGNAL_TYPE_UNSPEC:
 194                 range->max_qual.level = 100;
 195                 range->max_qual.qual = 100;
 196                 range->avg_qual.qual = 50;
 197                 range->max_qual.updated |= IW_QUAL_QUAL_UPDATED;
 198                 range->max_qual.updated |= IW_QUAL_LEVEL_UPDATED;
 199                 break;
 200         }
 201
 202         range->avg_qual.level = range->max_qual.level / 2;
 203         range->avg_qual.noise = range->max_qual.noise / 2;
 204         range->avg_qual.updated = range->max_qual.updated;
 205
 206         range->enc_capa = IW_ENC_CAPA_WPA | IW_ENC_CAPA_WPA2 |
 207                           IW_ENC_CAPA_CIPHER_TKIP | IW_ENC_CAPA_CIPHER_CCMP;
 208
 209         for (band = 0; band < IEEE80211_NUM_BANDS; band ++) {
 210                 int i;
 211                 struct ieee80211_supported_band *sband;
 212
 213                 sband = wdev->wiphy->bands[band];
 214
 215                 if (!sband)
 216                         continue;
 217
 218                 for (i = 0; i < sband->n_channels && c < IW_MAX_FREQUENCIES; i++) {
 219                         struct ieee80211_channel *chan = &sband->channels[i];
 220
 221                         if (!(chan->flags & IEEE80211_CHAN_DISABLED)) {
 222                                 range->freq[c].i =
 223                                         ieee80211_frequency_to_channel(
 224                                                 chan->center_freq);
 225                                 range->freq[c].m = chan->center_freq;
 226                                 range->freq[c].e = 6;
 227                                 c++;
 228                         }
 229                 }
 230         }
 231         range->num_channels = c;
 232         range->num_frequency = c;
 233
 234         IW_EVENT_CAPA_SET_KERNEL(range->event_capa);
 235         IW_EVENT_CAPA_SET(range->event_capa, SIOCGIWAP);
 236         IW_EVENT_CAPA_SET(range->event_capa, SIOCGIWSCAN);
 237
 238         range->scan_capa |= IW_SCAN_CAPA_ESSID;
 239
 240         return 0;
 241 }
 242 EXPORT_SYMBOL_GPL(cfg80211_wext_giwrange);
 243
 244 int cfg80211_wext_siwmlme(struct net_device *dev,
 245                           struct iw_request_info *info,
 246                           struct iw_point *data, char *extra)
 247 {
 248         struct wireless_dev *wdev = dev->ieee80211_ptr;
 249         struct iw_mlme *mlme = (struct iw_mlme *)extra;
 250         struct cfg80211_registered_device *rdev;
 251         union {
 252                 struct cfg80211_disassoc_request disassoc;
 253                 struct cfg80211_deauth_request deauth;
 254         } cmd;
 255
 256         if (!wdev)
 257                 return -EOPNOTSUPP;
 258
 259         rdev = wiphy_to_dev(wdev->wiphy);
 260
 261         if (wdev->iftype != NL80211_IFTYPE_STATION)
 262                 return -EINVAL;
 263
 264         if (mlme->addr.sa_family != ARPHRD_ETHER)
 265                 return -EINVAL;
 266
 267         memset(&cmd, 0, sizeof(cmd));
 268
 269         switch (mlme->cmd) {
 270         case IW_MLME_DEAUTH:
 271                 if (!rdev->ops->deauth)
 272                         return -EOPNOTSUPP;
 273                 cmd.deauth.peer_addr = mlme->addr.sa_data;
 274                 cmd.deauth.reason_code = mlme->reason_code;
 275                 return rdev->ops->deauth(wdev->wiphy, dev, &cmd.deauth);
 276         case IW_MLME_DISASSOC:
 277                 if (!rdev->ops->disassoc)
 278                         return -EOPNOTSUPP;
 279                 cmd.disassoc.peer_addr = mlme->addr.sa_data;
 280                 cmd.disassoc.reason_code = mlme->reason_code;
 281                 return rdev->ops->disassoc(wdev->wiphy, dev, &cmd.disassoc);
 282         default:
 283                 return -EOPNOTSUPP;
 284         }
 285 }
 286 EXPORT_SYMBOL_GPL(cfg80211_wext_siwmlme);
 287
 288
 289 /**
 290  * cfg80211_wext_freq - get wext frequency for non-"auto"
 291  * @wiphy: the wiphy
 292  * @freq: the wext freq encoding
 293  *
 294  * Returns a channel, %NULL for auto, or an ERR_PTR for errors!
 295  */
 296 struct ieee80211_channel *cfg80211_wext_freq(struct wiphy *wiphy,
 297                                              struct iw_freq *freq)
 298 {
 299         if (freq->e == 0) {
 300                 if (freq->m < 0)
 301                         return NULL;
 302                 else
 303                         return ieee80211_get_channel(wiphy,
 304                                 ieee80211_channel_to_frequency(freq->m));
 305         } else {
 306                 int i, div = 1000000;
 307                 for (i = 0; i < freq->e; i++)
 308                         div /= 10;
 309                 if (div > 0)
 310                         return ieee80211_get_channel(wiphy, freq->m / div);
 311                 else
 312                         return ERR_PTR(-EINVAL);
 313         }
 314
 315 }
 316 EXPORT_SYMBOL_GPL(cfg80211_wext_freq);
 317
 318 int cfg80211_wext_siwrts(struct net_device *dev,
 319                          struct iw_request_info *info,
 320                          struct iw_param *rts, char *extra)
 321 {
 322         struct wireless_dev *wdev = dev->ieee80211_ptr;
 323         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 324         u32 orts = wdev->wiphy->rts_threshold;
 325         int err;
 326
 327         if (rts->disabled || !rts->fixed)
 328                 wdev->wiphy->rts_threshold = (u32) -1;
 329         else if (rts->value < 0)
 330                 return -EINVAL;
 331         else
 332                 wdev->wiphy->rts_threshold = rts->value;
 333
 334         err = rdev->ops->set_wiphy_params(wdev->wiphy,
 335                                           WIPHY_PARAM_RTS_THRESHOLD);
 336         if (err)
 337                 wdev->wiphy->rts_threshold = orts;
 338
 339         return err;
 340 }
 341 EXPORT_SYMBOL_GPL(cfg80211_wext_siwrts);
 342
 343 int cfg80211_wext_giwrts(struct net_device *dev,
 344                          struct iw_request_info *info,
 345                          struct iw_param *rts, char *extra)
 346 {
 347         struct wireless_dev *wdev = dev->ieee80211_ptr;
 348
 349         rts->value = wdev->wiphy->rts_threshold;
 350         rts->disabled = rts->value == (u32) -1;
 351         rts->fixed = 1;
 352
 353         return 0;
 354 }
 355 EXPORT_SYMBOL_GPL(cfg80211_wext_giwrts);
 356
 357 int cfg80211_wext_siwfrag(struct net_device *dev,
 358                           struct iw_request_info *info,
 359                           struct iw_param *frag, char *extra)
 360 {
 361         struct wireless_dev *wdev = dev->ieee80211_ptr;
 362         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 363         u32 ofrag = wdev->wiphy->frag_threshold;
 364         int err;
 365
 366         if (frag->disabled || !frag->fixed)
 367                 wdev->wiphy->frag_threshold = (u32) -1;
 368         else if (frag->value < 256)
 369                 return -EINVAL;
 370         else {
 371                 /* Fragment length must be even, so strip LSB. */
 372                 wdev->wiphy->frag_threshold = frag->value & ~0x1;
 373         }
 374
 375         err = rdev->ops->set_wiphy_params(wdev->wiphy,
 376                                           WIPHY_PARAM_FRAG_THRESHOLD);
 377         if (err)
 378                 wdev->wiphy->frag_threshold = ofrag;
 379
 380         return err;
 381 }
 382 EXPORT_SYMBOL_GPL(cfg80211_wext_siwfrag);
 383
 384 int cfg80211_wext_giwfrag(struct net_device *dev,
 385                           struct iw_request_info *info,
 386                           struct iw_param *frag, char *extra)
 387 {
 388         struct wireless_dev *wdev = dev->ieee80211_ptr;
 389
 390         frag->value = wdev->wiphy->frag_threshold;
 391         frag->disabled = frag->value == (u32) -1;
 392         frag->fixed = 1;
 393
 394         return 0;
 395 }
 396 EXPORT_SYMBOL_GPL(cfg80211_wext_giwfrag);
 397
 398 int cfg80211_wext_siwretry(struct net_device *dev,
 399                            struct iw_request_info *info,
 400                            struct iw_param *retry, char *extra)
 401 {
 402         struct wireless_dev *wdev = dev->ieee80211_ptr;
 403         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 404         u32 changed = 0;
 405         u8 olong = wdev->wiphy->retry_long;
 406         u8 oshort = wdev->wiphy->retry_short;
 407         int err;
 408
 409         if (retry->disabled ||
 410             (retry->flags & IW_RETRY_TYPE) != IW_RETRY_LIMIT)
 411                 return -EINVAL;
 412
 413         if (retry->flags & IW_RETRY_LONG) {
 414                 wdev->wiphy->retry_long = retry->value;
 415                 changed |= WIPHY_PARAM_RETRY_LONG;
 416         } else if (retry->flags & IW_RETRY_SHORT) {
 417                 wdev->wiphy->retry_short = retry->value;
 418                 changed |= WIPHY_PARAM_RETRY_SHORT;
 419         } else {
 420                 wdev->wiphy->retry_short = retry->value;
 421                 wdev->wiphy->retry_long = retry->value;
 422                 changed |= WIPHY_PARAM_RETRY_LONG;
 423                 changed |= WIPHY_PARAM_RETRY_SHORT;
 424         }
 425
 426         if (!changed)
 427                 return 0;
 428
 429         err = rdev->ops->set_wiphy_params(wdev->wiphy, changed);
 430         if (err) {
 431                 wdev->wiphy->retry_short = oshort;
 432                 wdev->wiphy->retry_long = olong;
 433         }
 434
 435         return err;
 436 }
 437 EXPORT_SYMBOL_GPL(cfg80211_wext_siwretry);
 438
 439 int cfg80211_wext_giwretry(struct net_device *dev,
 440                            struct iw_request_info *info,
 441                            struct iw_param *retry, char *extra)
 442 {
 443         struct wireless_dev *wdev = dev->ieee80211_ptr;
 444
 445         retry->disabled = 0;
 446
 447         if (retry->flags == 0 || (retry->flags & IW_RETRY_SHORT)) {
 448                 /*
 449                  * First return short value, iwconfig will ask long value
 450                  * later if needed
 451                  */
 452                 retry->flags |= IW_RETRY_LIMIT;
 453                 retry->value = wdev->wiphy->retry_short;
 454                 if (wdev->wiphy->retry_long != wdev->wiphy->retry_short)
 455                         retry->flags |= IW_RETRY_LONG;
 456
 457                 return 0;
 458         }
 459
 460         if (retry->flags & IW_RETRY_LONG) {
 461                 retry->flags = IW_RETRY_LIMIT | IW_RETRY_LONG;
 462                 retry->value = wdev->wiphy->retry_long;
 463         }
 464
 465         return 0;
 466 }
 467 EXPORT_SYMBOL_GPL(cfg80211_wext_giwretry);