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/wireless.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(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(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(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(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(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         if (freq->e == 0) {
 301                 if (freq->m < 0)
 302                         return NULL;
 303                 else
 304                         return ieee80211_get_channel(wiphy,
 305                                 ieee80211_channel_to_frequency(freq->m));
 306         } else {
 307                 int i, div = 1000000;
 308                 for (i = 0; i < freq->e; i++)
 309                         div /= 10;
 310                 if (div > 0)
 311                         return ieee80211_get_channel(wiphy, freq->m / div);
 312                 else
 313                         return ERR_PTR(-EINVAL);
 314         }
 315
 316 }
 317 EXPORT_SYMBOL(cfg80211_wext_freq);