net/ieee80211/softmac/ieee80211softmac_wx.c

   1 /*
   2  * This file contains our _wx handlers. Make sure you EXPORT_SYMBOL_GPL them
   3  *
   4  * Copyright (c) 2005, 2006 Johannes Berg <johannes@sipsolutions.net>
   5  *                          Joseph Jezak <josejx@gentoo.org>
   6  *                          Larry Finger <Larry.Finger@lwfinger.net>
   7  *                          Danny van Dyk <kugelfang@gentoo.org>
   8  *                          Michael Buesch <mbuesch@freenet.de>
   9  *
  10  * This program is free software; you can redistribute it and/or modify it
  11  * under the terms of version 2 of the GNU General Public License as
  12  * published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but WITHOUT
  15  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  17  * more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  22  *
  23  * The full GNU General Public License is included in this distribution in the
  24  * file called COPYING.
  25  */
  26
  27 #include "ieee80211softmac_priv.h"
  28
  29 #include <net/iw_handler.h>
  30 /* for is_broadcast_ether_addr and is_zero_ether_addr */
  31 #include <linux/etherdevice.h>
  32
  33 int
  34 ieee80211softmac_wx_trigger_scan(struct net_device *net_dev,
  35                                  struct iw_request_info *info,
  36                                  union iwreq_data *data,
  37                                  char *extra)
  38 {
  39         struct ieee80211softmac_device *sm = ieee80211_priv(net_dev);
  40         return ieee80211softmac_start_scan(sm);
  41 }
  42 EXPORT_SYMBOL_GPL(ieee80211softmac_wx_trigger_scan);
  43
  44
  45 /* if we're still scanning, return -EAGAIN so that userspace tools
  46  * can get the complete scan results, otherwise return 0. */
  47 int
  48 ieee80211softmac_wx_get_scan_results(struct net_device *net_dev,
  49                                      struct iw_request_info *info,
  50                                      union iwreq_data *data,
  51                                      char *extra)
  52 {
  53         unsigned long flags;
  54         struct ieee80211softmac_device *sm = ieee80211_priv(net_dev);
  55
  56         spin_lock_irqsave(&sm->lock, flags);
  57         if (sm->scanning) {
  58                 spin_unlock_irqrestore(&sm->lock, flags);
  59                 return -EAGAIN;
  60         }
  61         spin_unlock_irqrestore(&sm->lock, flags);
  62         return ieee80211_wx_get_scan(sm->ieee, info, data, extra);
  63 }
  64 EXPORT_SYMBOL_GPL(ieee80211softmac_wx_get_scan_results);
  65
  66 int
  67 ieee80211softmac_wx_set_essid(struct net_device *net_dev,
  68                               struct iw_request_info *info,
  69                               union iwreq_data *data,
  70                               char *extra)
  71 {
  72         struct ieee80211softmac_device *sm = ieee80211_priv(net_dev);
  73         struct ieee80211softmac_auth_queue_item *authptr;
  74         int length = 0;
  75         DECLARE_MAC_BUF(mac);
  76
  77 check_assoc_again:
  78         mutex_lock(&sm->associnfo.mutex);
  79         if((sm->associnfo.associating || sm->associnfo.associated) &&
  80            (data->essid.flags && data->essid.length)) {
  81                 dprintk(KERN_INFO PFX "Canceling existing associate request!\n");
  82                 /* Cancel assoc work */
  83                 cancel_delayed_work(&sm->associnfo.work);
  84                 /* We don't have to do this, but it's a little cleaner */
  85                 list_for_each_entry(authptr, &sm->auth_queue, list)
  86                         cancel_delayed_work(&authptr->work);
  87                 sm->associnfo.bssvalid = 0;
  88                 sm->associnfo.bssfixed = 0;
  89                 sm->associnfo.associating = 0;
  90                 sm->associnfo.associated = 0;
  91                 /* We must unlock to avoid deadlocks with the assoc workqueue
  92                  * on the associnfo.mutex */
  93                 mutex_unlock(&sm->associnfo.mutex);
  94                 flush_workqueue(sm->wq);
  95                 /* Avoid race! Check assoc status again. Maybe someone started an
  96                  * association while we flushed. */
  97                 goto check_assoc_again;
  98         }
  99
 100         sm->associnfo.static_essid = 0;
 101         sm->associnfo.assoc_wait = 0;
 102
 103         if (data->essid.flags && data->essid.length) {
 104                 length = min((int)data->essid.length, IW_ESSID_MAX_SIZE);
 105                 if (length) {
 106                         memcpy(sm->associnfo.req_essid.data, extra, length);
 107                         sm->associnfo.static_essid = 1;
 108                 }
 109         }
 110
 111         /* set our requested ESSID length.
 112          * If applicable, we have already copied the data in */
 113         sm->associnfo.req_essid.len = length;
 114
 115         sm->associnfo.associating = 1;
 116         /* queue lower level code to do work (if necessary) */
 117         queue_delayed_work(sm->wq, &sm->associnfo.work, 0);
 118
 119         mutex_unlock(&sm->associnfo.mutex);
 120
 121         return 0;
 122 }
 123 EXPORT_SYMBOL_GPL(ieee80211softmac_wx_set_essid);
 124
 125 int
 126 ieee80211softmac_wx_get_essid(struct net_device *net_dev,
 127                               struct iw_request_info *info,
 128                               union iwreq_data *data,
 129                               char *extra)
 130 {
 131         struct ieee80211softmac_device *sm = ieee80211_priv(net_dev);
 132
 133         mutex_lock(&sm->associnfo.mutex);
 134         /* If all fails, return ANY (empty) */
 135         data->essid.length = 0;
 136         data->essid.flags = 0;  /* active */
 137
 138         /* If we have a statically configured ESSID then return it */
 139         if (sm->associnfo.static_essid) {
 140                 data->essid.length = sm->associnfo.req_essid.len;
 141                 data->essid.flags = 1;  /* active */
 142                 memcpy(extra, sm->associnfo.req_essid.data, sm->associnfo.req_essid.len);
 143                 dprintk(KERN_INFO PFX "Getting essid from req_essid\n");
 144         } else if (sm->associnfo.associated || sm->associnfo.associating) {
 145         /* If we're associating/associated, return that */
 146                 data->essid.length = sm->associnfo.associate_essid.len;
 147                 data->essid.flags = 1;  /* active */
 148                 memcpy(extra, sm->associnfo.associate_essid.data, sm->associnfo.associate_essid.len);
 149                 dprintk(KERN_INFO PFX "Getting essid from associate_essid\n");
 150         }
 151         mutex_unlock(&sm->associnfo.mutex);
 152
 153         return 0;
 154 }
 155 EXPORT_SYMBOL_GPL(ieee80211softmac_wx_get_essid);
 156
 157 int
 158 ieee80211softmac_wx_set_rate(struct net_device *net_dev,
 159                              struct iw_request_info *info,
 160                              union iwreq_data *data,
 161                              char *extra)
 162 {
 163         struct ieee80211softmac_device *mac = ieee80211_priv(net_dev);
 164         struct ieee80211_device *ieee = mac->ieee;
 165         unsigned long flags;
 166         s32 in_rate = data->bitrate.value;
 167         u8 rate;
 168         int is_ofdm = 0;
 169         int err = -EINVAL;
 170
 171         if (in_rate == -1) {
 172                 if (ieee->modulation & IEEE80211_OFDM_MODULATION)
 173                         in_rate = 24000000;
 174                 else
 175                         in_rate = 11000000;
 176         }
 177
 178         switch (in_rate) {
 179         case 1000000:
 180                 rate = IEEE80211_CCK_RATE_1MB;
 181                 break;
 182         case 2000000:
 183                 rate = IEEE80211_CCK_RATE_2MB;
 184                 break;
 185         case 5500000:
 186                 rate = IEEE80211_CCK_RATE_5MB;
 187                 break;
 188         case 11000000:
 189                 rate = IEEE80211_CCK_RATE_11MB;
 190                 break;
 191         case 6000000:
 192                 rate = IEEE80211_OFDM_RATE_6MB;
 193                 is_ofdm = 1;
 194                 break;
 195         case 9000000:
 196                 rate = IEEE80211_OFDM_RATE_9MB;
 197                 is_ofdm = 1;
 198                 break;
 199         case 12000000:
 200                 rate = IEEE80211_OFDM_RATE_12MB;
 201                 is_ofdm = 1;
 202                 break;
 203         case 18000000:
 204                 rate = IEEE80211_OFDM_RATE_18MB;
 205                 is_ofdm = 1;
 206                 break;
 207         case 24000000:
 208                 rate = IEEE80211_OFDM_RATE_24MB;
 209                 is_ofdm = 1;
 210                 break;
 211         case 36000000:
 212                 rate = IEEE80211_OFDM_RATE_36MB;
 213                 is_ofdm = 1;
 214                 break;
 215         case 48000000:
 216                 rate = IEEE80211_OFDM_RATE_48MB;
 217                 is_ofdm = 1;
 218                 break;
 219         case 54000000:
 220                 rate = IEEE80211_OFDM_RATE_54MB;
 221                 is_ofdm = 1;
 222                 break;
 223         default:
 224                 goto out;
 225         }
 226
 227         spin_lock_irqsave(&mac->lock, flags);
 228
 229         /* Check if correct modulation for this PHY. */
 230         if (is_ofdm && !(ieee->modulation & IEEE80211_OFDM_MODULATION))
 231                 goto out_unlock;
 232
 233         mac->txrates.user_rate = rate;
 234         ieee80211softmac_recalc_txrates(mac);
 235         err = 0;
 236
 237 out_unlock:
 238         spin_unlock_irqrestore(&mac->lock, flags);
 239 out:
 240         return err;
 241 }
 242 EXPORT_SYMBOL_GPL(ieee80211softmac_wx_set_rate);
 243
 244 int
 245 ieee80211softmac_wx_get_rate(struct net_device *net_dev,
 246                              struct iw_request_info *info,
 247                              union iwreq_data *data,
 248                              char *extra)
 249 {
 250         struct ieee80211softmac_device *mac = ieee80211_priv(net_dev);
 251         unsigned long flags;
 252         int err = -EINVAL;
 253
 254         spin_lock_irqsave(&mac->lock, flags);
 255
 256         if (unlikely(!mac->running)) {
 257                 err = -ENODEV;
 258                 goto out_unlock;
 259         }
 260
 261         switch (mac->txrates.default_rate) {
 262         case IEEE80211_CCK_RATE_1MB:
 263                 data->bitrate.value = 1000000;
 264                 break;
 265         case IEEE80211_CCK_RATE_2MB:
 266                 data->bitrate.value = 2000000;
 267                 break;
 268         case IEEE80211_CCK_RATE_5MB:
 269                 data->bitrate.value = 5500000;
 270                 break;
 271         case IEEE80211_CCK_RATE_11MB:
 272                 data->bitrate.value = 11000000;
 273                 break;
 274         case IEEE80211_OFDM_RATE_6MB:
 275                 data->bitrate.value = 6000000;
 276                 break;
 277         case IEEE80211_OFDM_RATE_9MB:
 278                 data->bitrate.value = 9000000;
 279                 break;
 280         case IEEE80211_OFDM_RATE_12MB:
 281                 data->bitrate.value = 12000000;
 282                 break;
 283         case IEEE80211_OFDM_RATE_18MB:
 284                 data->bitrate.value = 18000000;
 285                 break;
 286         case IEEE80211_OFDM_RATE_24MB:
 287                 data->bitrate.value = 24000000;
 288                 break;
 289         case IEEE80211_OFDM_RATE_36MB:
 290                 data->bitrate.value = 36000000;
 291                 break;
 292         case IEEE80211_OFDM_RATE_48MB:
 293                 data->bitrate.value = 48000000;
 294                 break;
 295         case IEEE80211_OFDM_RATE_54MB:
 296                 data->bitrate.value = 54000000;
 297                 break;
 298         default:
 299                 assert(0);
 300                 goto out_unlock;
 301         }
 302         err = 0;
 303 out_unlock:
 304         spin_unlock_irqrestore(&mac->lock, flags);
 305
 306         return err;
 307 }
 308 EXPORT_SYMBOL_GPL(ieee80211softmac_wx_get_rate);
 309
 310 int
 311 ieee80211softmac_wx_get_wap(struct net_device *net_dev,
 312                             struct iw_request_info *info,
 313                             union iwreq_data *data,
 314                             char *extra)
 315 {
 316         struct ieee80211softmac_device *mac = ieee80211_priv(net_dev);
 317         int err = 0;
 318
 319         mutex_lock(&mac->associnfo.mutex);
 320         if (mac->associnfo.bssvalid)
 321                 memcpy(data->ap_addr.sa_data, mac->associnfo.bssid, ETH_ALEN);
 322         else
 323                 memset(data->ap_addr.sa_data, 0xff, ETH_ALEN);
 324         data->ap_addr.sa_family = ARPHRD_ETHER;
 325         mutex_unlock(&mac->associnfo.mutex);
 326
 327         return err;
 328 }
 329 EXPORT_SYMBOL_GPL(ieee80211softmac_wx_get_wap);
 330
 331 int
 332 ieee80211softmac_wx_set_wap(struct net_device *net_dev,
 333                             struct iw_request_info *info,
 334                             union iwreq_data *data,
 335                             char *extra)
 336 {
 337         struct ieee80211softmac_device *mac = ieee80211_priv(net_dev);
 338
 339         /* sanity check */
 340         if (data->ap_addr.sa_family != ARPHRD_ETHER) {
 341                 return -EINVAL;
 342         }
 343
 344         mutex_lock(&mac->associnfo.mutex);
 345         if (is_broadcast_ether_addr(data->ap_addr.sa_data)) {
 346                 /* the bssid we have is not to be fixed any longer,
 347                  * and we should reassociate to the best AP. */
 348                 mac->associnfo.bssfixed = 0;
 349                 /* force reassociation */
 350                 mac->associnfo.bssvalid = 0;
 351                 if (mac->associnfo.associated)
 352                         queue_delayed_work(mac->wq, &mac->associnfo.work, 0);
 353         } else if (is_zero_ether_addr(data->ap_addr.sa_data)) {
 354                 /* the bssid we have is no longer fixed */
 355                 mac->associnfo.bssfixed = 0;
 356         } else {
 357                 if (!memcmp(mac->associnfo.bssid, data->ap_addr.sa_data, ETH_ALEN)) {
 358                         if (mac->associnfo.associating || mac->associnfo.associated) {
 359                         /* bssid unchanged and associated or associating - just return */
 360                                 goto out;
 361                         }
 362                 } else {
 363                         /* copy new value in data->ap_addr.sa_data to bssid */
 364                         memcpy(mac->associnfo.bssid, data->ap_addr.sa_data, ETH_ALEN);
 365                 }
 366                 /* tell the other code that this bssid should be used no matter what */
 367                 mac->associnfo.bssfixed = 1;
 368                 /* queue associate if new bssid or (old one again and not associated) */
 369                 queue_delayed_work(mac->wq, &mac->associnfo.work, 0);
 370         }
 371
 372  out:
 373         mutex_unlock(&mac->associnfo.mutex);
 374
 375         return 0;
 376 }
 377 EXPORT_SYMBOL_GPL(ieee80211softmac_wx_set_wap);
 378
 379 int
 380 ieee80211softmac_wx_set_genie(struct net_device *dev,
 381                               struct iw_request_info *info,
 382                               union iwreq_data *wrqu,
 383                               char *extra)
 384 {
 385         struct ieee80211softmac_device *mac = ieee80211_priv(dev);
 386         unsigned long flags;
 387         int err = 0;
 388         char *buf;
 389         int i;
 390
 391         mutex_lock(&mac->associnfo.mutex);
 392         spin_lock_irqsave(&mac->lock, flags);
 393         /* bleh. shouldn't be locked for that kmalloc... */
 394
 395         if (wrqu->data.length) {
 396                 if ((wrqu->data.length < 2) || (extra[1]+2 != wrqu->data.length)) {
 397                         /* this is an IE, so the length must be
 398                          * correct. Is it possible though that
 399                          * more than one IE is passed in?
 400                          */
 401                         err = -EINVAL;
 402                         goto out;
 403                 }
 404                 if (mac->wpa.IEbuflen <= wrqu->data.length) {
 405                         buf = kmalloc(wrqu->data.length, GFP_ATOMIC);
 406                         if (!buf) {
 407                                 err = -ENOMEM;
 408                                 goto out;
 409                         }
 410                         kfree(mac->wpa.IE);
 411                         mac->wpa.IE = buf;
 412                         mac->wpa.IEbuflen = wrqu->data.length;
 413                 }
 414                 memcpy(mac->wpa.IE, extra, wrqu->data.length);
 415                 dprintk(KERN_INFO PFX "generic IE set to ");
 416                 for (i=0;i<wrqu->data.length;i++)
 417                         dprintk("%.2x", (u8)mac->wpa.IE[i]);
 418                 dprintk("\n");
 419                 mac->wpa.IElen = wrqu->data.length;
 420         } else {
 421                 kfree(mac->wpa.IE);
 422                 mac->wpa.IE = NULL;
 423                 mac->wpa.IElen = 0;
 424                 mac->wpa.IEbuflen = 0;
 425         }
 426
 427  out:
 428         spin_unlock_irqrestore(&mac->lock, flags);
 429         mutex_unlock(&mac->associnfo.mutex);
 430
 431         return err;
 432 }
 433 EXPORT_SYMBOL_GPL(ieee80211softmac_wx_set_genie);
 434
 435 int
 436 ieee80211softmac_wx_get_genie(struct net_device *dev,
 437                               struct iw_request_info *info,
 438                               union iwreq_data *wrqu,
 439                               char *extra)
 440 {
 441         struct ieee80211softmac_device *mac = ieee80211_priv(dev);
 442         unsigned long flags;
 443         int err = 0;
 444         int space = wrqu->data.length;
 445
 446         mutex_lock(&mac->associnfo.mutex);
 447         spin_lock_irqsave(&mac->lock, flags);
 448
 449         wrqu->data.length = 0;
 450
 451         if (mac->wpa.IE && mac->wpa.IElen) {
 452                 wrqu->data.length = mac->wpa.IElen;
 453                 if (mac->wpa.IElen <= space)
 454                         memcpy(extra, mac->wpa.IE, mac->wpa.IElen);
 455                 else
 456                         err = -E2BIG;
 457         }
 458         spin_unlock_irqrestore(&mac->lock, flags);
 459         mutex_unlock(&mac->associnfo.mutex);
 460
 461         return err;
 462 }
 463 EXPORT_SYMBOL_GPL(ieee80211softmac_wx_get_genie);
 464
 465 int
 466 ieee80211softmac_wx_set_mlme(struct net_device *dev,
 467                              struct iw_request_info *info,
 468                              union iwreq_data *wrqu,
 469                              char *extra)
 470 {
 471         struct ieee80211softmac_device *mac = ieee80211_priv(dev);
 472         struct iw_mlme *mlme = (struct iw_mlme *)extra;
 473         u16 reason = mlme->reason_code;
 474         struct ieee80211softmac_network *net;
 475         int err = -EINVAL;
 476
 477         mutex_lock(&mac->associnfo.mutex);
 478
 479         if (memcmp(mac->associnfo.bssid, mlme->addr.sa_data, ETH_ALEN)) {
 480                 printk(KERN_DEBUG PFX "wx_set_mlme: requested operation on net we don't use\n");
 481                 goto out;
 482         }
 483
 484         switch (mlme->cmd) {
 485         case IW_MLME_DEAUTH:
 486                 net = ieee80211softmac_get_network_by_bssid_locked(mac, mlme->addr.sa_data);
 487                 if (!net) {
 488                         printk(KERN_DEBUG PFX "wx_set_mlme: we should know the net here...\n");
 489                         goto out;
 490                 }
 491                 err =  ieee80211softmac_deauth_req(mac, net, reason);
 492                 goto out;
 493         case IW_MLME_DISASSOC:
 494                 ieee80211softmac_send_disassoc_req(mac, reason);
 495                 mac->associnfo.associated = 0;
 496                 mac->associnfo.associating = 0;
 497                 err = 0;
 498                 goto out;
 499         default:
 500                 err = -EOPNOTSUPP;
 501         }
 502
 503 out:
 504         mutex_unlock(&mac->associnfo.mutex);
 505
 506         return err;
 507 }
 508 EXPORT_SYMBOL_GPL(ieee80211softmac_wx_set_mlme);