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
  76 check_assoc_again:
  77         mutex_lock(&sm->associnfo.mutex);
  78         if((sm->associnfo.associating || sm->associnfo.associated) &&
  79            (data->essid.flags && data->essid.length)) {
  80                 dprintk(KERN_INFO PFX "Canceling existing associate request!\n");
  81                 /* Cancel assoc work */
  82                 cancel_delayed_work(&sm->associnfo.work);
  83                 /* We don't have to do this, but it's a little cleaner */
  84                 list_for_each_entry(authptr, &sm->auth_queue, list)
  85                         cancel_delayed_work(&authptr->work);
  86                 sm->associnfo.bssvalid = 0;
  87                 sm->associnfo.bssfixed = 0;
  88                 sm->associnfo.associating = 0;
  89                 sm->associnfo.associated = 0;
  90                 /* We must unlock to avoid deadlocks with the assoc workqueue
  91                  * on the associnfo.mutex */
  92                 mutex_unlock(&sm->associnfo.mutex);
  93                 flush_scheduled_work();
  94                 /* Avoid race! Check assoc status again. Maybe someone started an
  95                  * association while we flushed. */
  96                 goto check_assoc_again;
  97         }
  98
  99         sm->associnfo.static_essid = 0;
 100         sm->associnfo.assoc_wait = 0;
 101
 102         if (data->essid.flags && data->essid.length) {
 103                 length = min((int)data->essid.length, IW_ESSID_MAX_SIZE);
 104                 if (length) {
 105                         memcpy(sm->associnfo.req_essid.data, extra, length);
 106                         sm->associnfo.static_essid = 1;
 107                 }
 108         }
 109
 110         /* set our requested ESSID length.
 111          * If applicable, we have already copied the data in */
 112         sm->associnfo.req_essid.len = length;
 113
 114         sm->associnfo.associating = 1;
 115         /* queue lower level code to do work (if necessary) */
 116         schedule_delayed_work(&sm->associnfo.work, 0);
 117 out:
 118         mutex_unlock(&sm->associnfo.mutex);
 119
 120         return 0;
 121 }
 122 EXPORT_SYMBOL_GPL(ieee80211softmac_wx_set_essid);
 123
 124 int
 125 ieee80211softmac_wx_get_essid(struct net_device *net_dev,
 126                               struct iw_request_info *info,
 127                               union iwreq_data *data,
 128                               char *extra)
 129 {
 130         struct ieee80211softmac_device *sm = ieee80211_priv(net_dev);
 131
 132         mutex_lock(&sm->associnfo.mutex);
 133         /* If all fails, return ANY (empty) */
 134         data->essid.length = 0;
 135         data->essid.flags = 0;  /* active */
 136
 137         /* If we have a statically configured ESSID then return it */
 138         if (sm->associnfo.static_essid) {
 139                 data->essid.length = sm->associnfo.req_essid.len;
 140                 data->essid.flags = 1;  /* active */
 141                 memcpy(extra, sm->associnfo.req_essid.data, sm->associnfo.req_essid.len);
 142                 dprintk(KERN_INFO PFX "Getting essid from req_essid\n");
 143         } else if (sm->associnfo.associated || sm->associnfo.associating) {
 144         /* If we're associating/associated, return that */
 145                 data->essid.length = sm->associnfo.associate_essid.len;
 146                 data->essid.flags = 1;  /* active */
 147                 memcpy(extra, sm->associnfo.associate_essid.data, sm->associnfo.associate_essid.len);
 148                 dprintk(KERN_INFO PFX "Getting essid from associate_essid\n");
 149         }
 150         mutex_unlock(&sm->associnfo.mutex);
 151
 152         return 0;
 153 }
 154 EXPORT_SYMBOL_GPL(ieee80211softmac_wx_get_essid);
 155
 156 int
 157 ieee80211softmac_wx_set_rate(struct net_device *net_dev,
 158                              struct iw_request_info *info,
 159                              union iwreq_data *data,
 160                              char *extra)
 161 {
 162         struct ieee80211softmac_device *mac = ieee80211_priv(net_dev);
 163         struct ieee80211_device *ieee = mac->ieee;
 164         unsigned long flags;
 165         s32 in_rate = data->bitrate.value;
 166         u8 rate;
 167         int is_ofdm = 0;
 168         int err = -EINVAL;
 169
 170         if (in_rate == -1) {
 171                 if (ieee->modulation & IEEE80211_OFDM_MODULATION)
 172                         in_rate = 24000000;
 173                 else
 174                         in_rate = 11000000;
 175         }
 176
 177         switch (in_rate) {
 178         case 1000000:
 179                 rate = IEEE80211_CCK_RATE_1MB;
 180                 break;
 181         case 2000000:
 182                 rate = IEEE80211_CCK_RATE_2MB;
 183                 break;
 184         case 5500000:
 185                 rate = IEEE80211_CCK_RATE_5MB;
 186                 break;
 187         case 11000000:
 188                 rate = IEEE80211_CCK_RATE_11MB;
 189                 break;
 190         case 6000000:
 191                 rate = IEEE80211_OFDM_RATE_6MB;
 192                 is_ofdm = 1;
 193                 break;
 194         case 9000000:
 195                 rate = IEEE80211_OFDM_RATE_9MB;
 196                 is_ofdm = 1;
 197                 break;
 198         case 12000000:
 199                 rate = IEEE80211_OFDM_RATE_12MB;
 200                 is_ofdm = 1;
 201                 break;
 202         case 18000000:
 203                 rate = IEEE80211_OFDM_RATE_18MB;
 204                 is_ofdm = 1;
 205                 break;
 206         case 24000000:
 207                 rate = IEEE80211_OFDM_RATE_24MB;
 208                 is_ofdm = 1;
 209                 break;
 210         case 36000000:
 211                 rate = IEEE80211_OFDM_RATE_36MB;
 212                 is_ofdm = 1;
 213                 break;
 214         case 48000000:
 215                 rate = IEEE80211_OFDM_RATE_48MB;
 216                 is_ofdm = 1;
 217                 break;
 218         case 54000000:
 219                 rate = IEEE80211_OFDM_RATE_54MB;
 220                 is_ofdm = 1;
 221                 break;
 222         default:
 223                 goto out;
 224         }
 225
 226         spin_lock_irqsave(&mac->lock, flags);
 227
 228         /* Check if correct modulation for this PHY. */
 229         if (is_ofdm && !(ieee->modulation & IEEE80211_OFDM_MODULATION))
 230                 goto out_unlock;
 231
 232         mac->txrates.user_rate = rate;
 233         ieee80211softmac_recalc_txrates(mac);
 234         err = 0;
 235
 236 out_unlock:
 237         spin_unlock_irqrestore(&mac->lock, flags);
 238 out:
 239         return err;
 240 }
 241 EXPORT_SYMBOL_GPL(ieee80211softmac_wx_set_rate);
 242
 243 int
 244 ieee80211softmac_wx_get_rate(struct net_device *net_dev,
 245                              struct iw_request_info *info,
 246                              union iwreq_data *data,
 247                              char *extra)
 248 {
 249         struct ieee80211softmac_device *mac = ieee80211_priv(net_dev);
 250         unsigned long flags;
 251         int err = -EINVAL;
 252
 253         spin_lock_irqsave(&mac->lock, flags);
 254
 255         if (unlikely(!mac->running)) {
 256                 err = -ENODEV;
 257                 goto out_unlock;
 258         }
 259
 260         switch (mac->txrates.default_rate) {
 261         case IEEE80211_CCK_RATE_1MB:
 262                 data->bitrate.value = 1000000;
 263                 break;
 264         case IEEE80211_CCK_RATE_2MB:
 265                 data->bitrate.value = 2000000;
 266                 break;
 267         case IEEE80211_CCK_RATE_5MB:
 268                 data->bitrate.value = 5500000;
 269                 break;
 270         case IEEE80211_CCK_RATE_11MB:
 271                 data->bitrate.value = 11000000;
 272                 break;
 273         case IEEE80211_OFDM_RATE_6MB:
 274                 data->bitrate.value = 6000000;
 275                 break;
 276         case IEEE80211_OFDM_RATE_9MB:
 277                 data->bitrate.value = 9000000;
 278                 break;
 279         case IEEE80211_OFDM_RATE_12MB:
 280                 data->bitrate.value = 12000000;
 281                 break;
 282         case IEEE80211_OFDM_RATE_18MB:
 283                 data->bitrate.value = 18000000;
 284                 break;
 285         case IEEE80211_OFDM_RATE_24MB:
 286                 data->bitrate.value = 24000000;
 287                 break;
 288         case IEEE80211_OFDM_RATE_36MB:
 289                 data->bitrate.value = 36000000;
 290                 break;
 291         case IEEE80211_OFDM_RATE_48MB:
 292                 data->bitrate.value = 48000000;
 293                 break;
 294         case IEEE80211_OFDM_RATE_54MB:
 295                 data->bitrate.value = 54000000;
 296                 break;
 297         default:
 298                 assert(0);
 299                 goto out_unlock;
 300         }
 301         err = 0;
 302 out_unlock:
 303         spin_unlock_irqrestore(&mac->lock, flags);
 304
 305         return err;
 306 }
 307 EXPORT_SYMBOL_GPL(ieee80211softmac_wx_get_rate);
 308
 309 int
 310 ieee80211softmac_wx_get_wap(struct net_device *net_dev,
 311                             struct iw_request_info *info,
 312                             union iwreq_data *data,
 313                             char *extra)
 314 {
 315         struct ieee80211softmac_device *mac = ieee80211_priv(net_dev);
 316         int err = 0;
 317
 318         mutex_lock(&mac->associnfo.mutex);
 319         if (mac->associnfo.bssvalid)
 320                 memcpy(data->ap_addr.sa_data, mac->associnfo.bssid, ETH_ALEN);
 321         else
 322                 memset(data->ap_addr.sa_data, 0xff, ETH_ALEN);
 323         data->ap_addr.sa_family = ARPHRD_ETHER;
 324         mutex_unlock(&mac->associnfo.mutex);
 325
 326         return err;
 327 }
 328 EXPORT_SYMBOL_GPL(ieee80211softmac_wx_get_wap);
 329
 330 int
 331 ieee80211softmac_wx_set_wap(struct net_device *net_dev,
 332                             struct iw_request_info *info,
 333                             union iwreq_data *data,
 334                             char *extra)
 335 {
 336         struct ieee80211softmac_device *mac = ieee80211_priv(net_dev);
 337
 338         /* sanity check */
 339         if (data->ap_addr.sa_family != ARPHRD_ETHER) {
 340                 return -EINVAL;
 341         }
 342
 343         mutex_lock(&mac->associnfo.mutex);
 344         if (is_broadcast_ether_addr(data->ap_addr.sa_data)) {
 345                 /* the bssid we have is not to be fixed any longer,
 346                  * and we should reassociate to the best AP. */
 347                 mac->associnfo.bssfixed = 0;
 348                 /* force reassociation */
 349                 mac->associnfo.bssvalid = 0;
 350                 if (mac->associnfo.associated)
 351                         schedule_delayed_work(&mac->associnfo.work, 0);
 352         } else if (is_zero_ether_addr(data->ap_addr.sa_data)) {
 353                 /* the bssid we have is no longer fixed */
 354                 mac->associnfo.bssfixed = 0;
 355         } else {
 356                 if (!memcmp(mac->associnfo.bssid, data->ap_addr.sa_data, ETH_ALEN)) {
 357                         if (mac->associnfo.associating || mac->associnfo.associated) {
 358                         /* bssid unchanged and associated or associating - just return */
 359                                 goto out;
 360                         }
 361                 } else {
 362                         /* copy new value in data->ap_addr.sa_data to bssid */
 363                         memcpy(mac->associnfo.bssid, data->ap_addr.sa_data, ETH_ALEN);
 364                 }
 365                 /* tell the other code that this bssid should be used no matter what */
 366                 mac->associnfo.bssfixed = 1;
 367                 /* queue associate if new bssid or (old one again and not associated) */
 368                 schedule_delayed_work(&mac->associnfo.work, 0);
 369         }
 370
 371  out:
 372         mutex_unlock(&mac->associnfo.mutex);
 373
 374         return 0;
 375 }
 376 EXPORT_SYMBOL_GPL(ieee80211softmac_wx_set_wap);
 377
 378 int
 379 ieee80211softmac_wx_set_genie(struct net_device *dev,
 380                               struct iw_request_info *info,
 381                               union iwreq_data *wrqu,
 382                               char *extra)
 383 {
 384         struct ieee80211softmac_device *mac = ieee80211_priv(dev);
 385         unsigned long flags;
 386         int err = 0;
 387         char *buf;
 388         int i;
 389
 390         mutex_lock(&mac->associnfo.mutex);
 391         spin_lock_irqsave(&mac->lock, flags);
 392         /* bleh. shouldn't be locked for that kmalloc... */
 393
 394         if (wrqu->data.length) {
 395                 if ((wrqu->data.length < 2) || (extra[1]+2 != wrqu->data.length)) {
 396                         /* this is an IE, so the length must be
 397                          * correct. Is it possible though that
 398                          * more than one IE is passed in?
 399                          */
 400                         err = -EINVAL;
 401                         goto out;
 402                 }
 403                 if (mac->wpa.IEbuflen <= wrqu->data.length) {
 404                         buf = kmalloc(wrqu->data.length, GFP_ATOMIC);
 405                         if (!buf) {
 406                                 err = -ENOMEM;
 407                                 goto out;
 408                         }
 409                         kfree(mac->wpa.IE);
 410                         mac->wpa.IE = buf;
 411                         mac->wpa.IEbuflen = wrqu->data.length;
 412                 }
 413                 memcpy(mac->wpa.IE, extra, wrqu->data.length);
 414                 dprintk(KERN_INFO PFX "generic IE set to ");
 415                 for (i=0;i<wrqu->data.length;i++)
 416                         dprintk("%.2x", (u8)mac->wpa.IE[i]);
 417                 dprintk("\n");
 418                 mac->wpa.IElen = wrqu->data.length;
 419         } else {
 420                 kfree(mac->wpa.IE);
 421                 mac->wpa.IE = NULL;
 422                 mac->wpa.IElen = 0;
 423                 mac->wpa.IEbuflen = 0;
 424         }
 425
 426  out:
 427         spin_unlock_irqrestore(&mac->lock, flags);
 428         mutex_unlock(&mac->associnfo.mutex);
 429
 430         return err;
 431 }
 432 EXPORT_SYMBOL_GPL(ieee80211softmac_wx_set_genie);
 433
 434 int
 435 ieee80211softmac_wx_get_genie(struct net_device *dev,
 436                               struct iw_request_info *info,
 437                               union iwreq_data *wrqu,
 438                               char *extra)
 439 {
 440         struct ieee80211softmac_device *mac = ieee80211_priv(dev);
 441         unsigned long flags;
 442         int err = 0;
 443         int space = wrqu->data.length;
 444
 445         mutex_lock(&mac->associnfo.mutex);
 446         spin_lock_irqsave(&mac->lock, flags);
 447
 448         wrqu->data.length = 0;
 449
 450         if (mac->wpa.IE && mac->wpa.IElen) {
 451                 wrqu->data.length = mac->wpa.IElen;
 452                 if (mac->wpa.IElen <= space)
 453                         memcpy(extra, mac->wpa.IE, mac->wpa.IElen);
 454                 else
 455                         err = -E2BIG;
 456         }
 457         spin_unlock_irqrestore(&mac->lock, flags);
 458         mutex_unlock(&mac->associnfo.mutex);
 459
 460         return err;
 461 }
 462 EXPORT_SYMBOL_GPL(ieee80211softmac_wx_get_genie);
 463
 464 int
 465 ieee80211softmac_wx_set_mlme(struct net_device *dev,
 466                              struct iw_request_info *info,
 467                              union iwreq_data *wrqu,
 468                              char *extra)
 469 {
 470         struct ieee80211softmac_device *mac = ieee80211_priv(dev);
 471         struct iw_mlme *mlme = (struct iw_mlme *)extra;
 472         u16 reason = cpu_to_le16(mlme->reason_code);
 473         struct ieee80211softmac_network *net;
 474         int err = -EINVAL;
 475
 476         mutex_lock(&mac->associnfo.mutex);
 477
 478         if (memcmp(mac->associnfo.bssid, mlme->addr.sa_data, ETH_ALEN)) {
 479                 printk(KERN_DEBUG PFX "wx_set_mlme: requested operation on net we don't use\n");
 480                 goto out;
 481         }
 482
 483         switch (mlme->cmd) {
 484         case IW_MLME_DEAUTH:
 485                 net = ieee80211softmac_get_network_by_bssid_locked(mac, mlme->addr.sa_data);
 486                 if (!net) {
 487                         printk(KERN_DEBUG PFX "wx_set_mlme: we should know the net here...\n");
 488                         goto out;
 489                 }
 490                 err =  ieee80211softmac_deauth_req(mac, net, reason);
 491                 goto out;
 492         case IW_MLME_DISASSOC:
 493                 ieee80211softmac_send_disassoc_req(mac, reason);
 494                 mac->associnfo.associated = 0;
 495                 mac->associnfo.associating = 0;
 496                 err = 0;
 497                 goto out;
 498         default:
 499                 err = -EOPNOTSUPP;
 500         }
 501
 502 out:
 503         mutex_unlock(&mac->associnfo.mutex);
 504
 505         return err;
 506 }
 507 EXPORT_SYMBOL_GPL(ieee80211softmac_wx_set_mlme);