SAFE public projects git trees. - safe/jmp/linux-2.6/blob - net/wireless/wext-sme.c

   1 /*
   2  * cfg80211 wext compat for managed mode.
   3  *
   4  * Copyright 2009       Johannes Berg <johannes@sipsolutions.net>
   5  * Copyright (C) 2009   Intel Corporation. All rights reserved.
   6  */
   7
   8 #include <linux/etherdevice.h>
   9 #include <linux/if_arp.h>
  10 #include <net/cfg80211.h>
  11 #include "nl80211.h"
  12
  13 static int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
  14                                      struct wireless_dev *wdev)
  15 {
  16         int err;
  17
  18         if (!netif_running(wdev->netdev))
  19                 return 0;
  20
  21         wdev->wext.connect.ie = wdev->wext.ie;
  22         wdev->wext.connect.ie_len = wdev->wext.ie_len;
  23         wdev->wext.connect.privacy = wdev->wext.default_key != -1;
  24
  25         err = 0;
  26         if (wdev->wext.connect.ssid_len != 0)
  27                 err = cfg80211_connect(rdev, wdev->netdev,
  28                                         &wdev->wext.connect);
  29
  30         return err;
  31 }
  32
  33 int cfg80211_mgd_wext_siwfreq(struct net_device *dev,
  34                               struct iw_request_info *info,
  35                               struct iw_freq *freq, char *extra)
  36 {
  37         struct wireless_dev *wdev = dev->ieee80211_ptr;
  38         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
  39         struct ieee80211_channel *chan;
  40         int err;
  41
  42         /* call only for station! */
  43         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
  44                 return -EINVAL;
  45
  46         chan = cfg80211_wext_freq(wdev->wiphy, freq);
  47         if (chan && IS_ERR(chan))
  48                 return PTR_ERR(chan);
  49
  50         if (chan && (chan->flags & IEEE80211_CHAN_DISABLED))
  51                 return -EINVAL;
  52
  53         if (wdev->wext.connect.channel == chan)
  54                 return 0;
  55
  56         if (wdev->sme_state != CFG80211_SME_IDLE) {
  57                 bool event = true;
  58                 /* if SSID set, we'll try right again, avoid event */
  59                 if (wdev->wext.connect.ssid_len)
  60                         event = false;
  61                 err = cfg80211_disconnect(wiphy_to_dev(wdev->wiphy),
  62                                           dev, WLAN_REASON_DEAUTH_LEAVING,
  63                                           event);
  64                 if (err)
  65                         return err;
  66         }
  67
  68         wdev->wext.connect.channel = chan;
  69
  70         /* SSID is not set, we just want to switch channel */
  71         if (wdev->wext.connect.ssid_len && chan) {
  72                 if (!rdev->ops->set_channel)
  73                         return -EOPNOTSUPP;
  74
  75                 return rdev->ops->set_channel(wdev->wiphy, chan,
  76                                               NL80211_CHAN_NO_HT);
  77         }
  78
  79         return cfg80211_mgd_wext_connect(wiphy_to_dev(wdev->wiphy), wdev);
  80 }
  81 /* temporary symbol - mark GPL - in the future the handler won't be */
  82 EXPORT_SYMBOL_GPL(cfg80211_mgd_wext_siwfreq);
  83
  84 int cfg80211_mgd_wext_giwfreq(struct net_device *dev,
  85                               struct iw_request_info *info,
  86                               struct iw_freq *freq, char *extra)
  87 {
  88         struct wireless_dev *wdev = dev->ieee80211_ptr;
  89         struct ieee80211_channel *chan = NULL;
  90
  91         /* call only for station! */
  92         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
  93                 return -EINVAL;
  94
  95         if (wdev->current_bss)
  96                 chan = wdev->current_bss->channel;
  97         else if (wdev->wext.connect.channel)
  98                 chan = wdev->wext.connect.channel;
  99
 100         if (chan) {
 101                 freq->m = chan->center_freq;
 102                 freq->e = 6;
 103                 return 0;
 104         }
 105
 106         /* no channel if not joining */
 107         return -EINVAL;
 108 }
 109 /* temporary symbol - mark GPL - in the future the handler won't be */
 110 EXPORT_SYMBOL_GPL(cfg80211_mgd_wext_giwfreq);
 111
 112 int cfg80211_mgd_wext_siwessid(struct net_device *dev,
 113                                struct iw_request_info *info,
 114                                struct iw_point *data, char *ssid)
 115 {
 116         struct wireless_dev *wdev = dev->ieee80211_ptr;
 117         size_t len = data->length;
 118         int err;
 119
 120         /* call only for station! */
 121         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
 122                 return -EINVAL;
 123
 124         if (!data->flags)
 125                 len = 0;
 126
 127         /* iwconfig uses nul termination in SSID.. */
 128         if (len > 0 && ssid[len - 1] == '\0')
 129                 len--;
 130
 131         if (wdev->wext.connect.ssid && len &&
 132             len == wdev->wext.connect.ssid_len &&
 133             memcmp(wdev->wext.connect.ssid, ssid, len))
 134                 return 0;
 135
 136         if (wdev->sme_state != CFG80211_SME_IDLE) {
 137                 bool event = true;
 138                 /* if SSID set now, we'll try to connect, avoid event */
 139                 if (len)
 140                         event = false;
 141                 err = cfg80211_disconnect(wiphy_to_dev(wdev->wiphy),
 142                                           dev, WLAN_REASON_DEAUTH_LEAVING,
 143                                           event);
 144                 if (err)
 145                         return err;
 146         }
 147
 148         wdev->wext.connect.ssid = wdev->wext.ssid;
 149         memcpy(wdev->wext.ssid, ssid, len);
 150         wdev->wext.connect.ssid_len = len;
 151
 152         wdev->wext.connect.crypto.control_port = false;
 153
 154         return cfg80211_mgd_wext_connect(wiphy_to_dev(wdev->wiphy), wdev);
 155 }
 156 /* temporary symbol - mark GPL - in the future the handler won't be */
 157 EXPORT_SYMBOL_GPL(cfg80211_mgd_wext_siwessid);
 158
 159 int cfg80211_mgd_wext_giwessid(struct net_device *dev,
 160                                struct iw_request_info *info,
 161                                struct iw_point *data, char *ssid)
 162 {
 163         struct wireless_dev *wdev = dev->ieee80211_ptr;
 164
 165         /* call only for station! */
 166         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
 167                 return -EINVAL;
 168
 169         data->flags = 0;
 170
 171         if (wdev->ssid_len) {
 172                 data->flags = 1;
 173                 data->length = wdev->ssid_len;
 174                 memcpy(ssid, wdev->ssid, data->length);
 175         } else if (wdev->wext.connect.ssid && wdev->wext.connect.ssid_len) {
 176                 data->flags = 1;
 177                 data->length = wdev->wext.connect.ssid_len;
 178                 memcpy(ssid, wdev->wext.connect.ssid, data->length);
 179         } else
 180                 data->flags = 0;
 181
 182         return 0;
 183 }
 184 /* temporary symbol - mark GPL - in the future the handler won't be */
 185 EXPORT_SYMBOL_GPL(cfg80211_mgd_wext_giwessid);
 186
 187 int cfg80211_mgd_wext_siwap(struct net_device *dev,
 188                             struct iw_request_info *info,
 189                             struct sockaddr *ap_addr, char *extra)
 190 {
 191         struct wireless_dev *wdev = dev->ieee80211_ptr;
 192         u8 *bssid = ap_addr->sa_data;
 193         int err;
 194
 195         /* call only for station! */
 196         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
 197                 return -EINVAL;
 198
 199         if (ap_addr->sa_family != ARPHRD_ETHER)
 200                 return -EINVAL;
 201
 202         /* automatic mode */
 203         if (is_zero_ether_addr(bssid) || is_broadcast_ether_addr(bssid))
 204                 bssid = NULL;
 205
 206         /* both automatic */
 207         if (!bssid && !wdev->wext.connect.bssid)
 208                 return 0;
 209
 210         /* fixed already - and no change */
 211         if (wdev->wext.connect.bssid && bssid &&
 212             compare_ether_addr(bssid, wdev->wext.connect.bssid) == 0)
 213                 return 0;
 214
 215         if (wdev->sme_state != CFG80211_SME_IDLE) {
 216                 err = cfg80211_disconnect(wiphy_to_dev(wdev->wiphy),
 217                                           dev, WLAN_REASON_DEAUTH_LEAVING,
 218                                           false);
 219                 if (err)
 220                         return err;
 221         }
 222
 223         if (bssid) {
 224                 memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
 225                 wdev->wext.connect.bssid = wdev->wext.bssid;
 226         } else
 227                 wdev->wext.connect.bssid = NULL;
 228
 229         return cfg80211_mgd_wext_connect(wiphy_to_dev(wdev->wiphy), wdev);
 230 }
 231 /* temporary symbol - mark GPL - in the future the handler won't be */
 232 EXPORT_SYMBOL_GPL(cfg80211_mgd_wext_siwap);
 233
 234 int cfg80211_mgd_wext_giwap(struct net_device *dev,
 235                             struct iw_request_info *info,
 236                             struct sockaddr *ap_addr, char *extra)
 237 {
 238         struct wireless_dev *wdev = dev->ieee80211_ptr;
 239
 240         /* call only for station! */
 241         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
 242                 return -EINVAL;
 243
 244         ap_addr->sa_family = ARPHRD_ETHER;
 245
 246         if (wdev->current_bss)
 247                 memcpy(ap_addr->sa_data, wdev->current_bss->bssid, ETH_ALEN);
 248         else if (wdev->wext.connect.bssid)
 249                 memcpy(ap_addr->sa_data, wdev->wext.connect.bssid, ETH_ALEN);
 250         else
 251                 memset(ap_addr->sa_data, 0, ETH_ALEN);
 252
 253         return 0;
 254 }
 255 /* temporary symbol - mark GPL - in the future the handler won't be */
 256 EXPORT_SYMBOL_GPL(cfg80211_mgd_wext_giwap);
 257
 258 int cfg80211_wext_siwgenie(struct net_device *dev,
 259                            struct iw_request_info *info,
 260                            struct iw_point *data, char *extra)
 261 {
 262         struct wireless_dev *wdev = dev->ieee80211_ptr;
 263         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 264         u8 *ie = extra;
 265         int ie_len = data->length, err;
 266
 267         if (wdev->iftype != NL80211_IFTYPE_STATION)
 268                 return -EOPNOTSUPP;
 269
 270         if (!ie_len)
 271                 ie = NULL;
 272
 273         /* no change */
 274         if (wdev->wext.ie_len == ie_len &&
 275             memcmp(wdev->wext.ie, ie, ie_len) == 0)
 276                 return 0;
 277
 278         if (ie_len) {
 279                 ie = kmemdup(extra, ie_len, GFP_KERNEL);
 280                 if (!ie)
 281                         return -ENOMEM;
 282         } else
 283                 ie = NULL;
 284
 285         kfree(wdev->wext.ie);
 286         wdev->wext.ie = ie;
 287         wdev->wext.ie_len = ie_len;
 288
 289         if (wdev->sme_state != CFG80211_SME_IDLE) {
 290                 err = cfg80211_disconnect(rdev, dev,
 291                                           WLAN_REASON_DEAUTH_LEAVING, false);
 292                 if (err)
 293                         return err;
 294         }
 295
 296         /* userspace better not think we'll reconnect */
 297         return 0;
 298 }
 299 EXPORT_SYMBOL_GPL(cfg80211_wext_siwgenie);
 300
 301 int cfg80211_wext_siwmlme(struct net_device *dev,
 302                           struct iw_request_info *info,
 303                           struct iw_point *data, char *extra)
 304 {
 305         struct wireless_dev *wdev = dev->ieee80211_ptr;
 306         struct iw_mlme *mlme = (struct iw_mlme *)extra;
 307         struct cfg80211_registered_device *rdev;
 308
 309         if (!wdev)
 310                 return -EOPNOTSUPP;
 311
 312         rdev = wiphy_to_dev(wdev->wiphy);
 313
 314         if (wdev->iftype != NL80211_IFTYPE_STATION)
 315                 return -EINVAL;
 316
 317         if (mlme->addr.sa_family != ARPHRD_ETHER)
 318                 return -EINVAL;
 319
 320         switch (mlme->cmd) {
 321         case IW_MLME_DEAUTH:
 322         case IW_MLME_DISASSOC:
 323                 return cfg80211_disconnect(rdev, dev, mlme->reason_code,
 324                                            true);
 325         default:
 326                 return -EOPNOTSUPP;
 327         }
 328 }
 329 EXPORT_SYMBOL_GPL(cfg80211_wext_siwmlme);