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_network *n;
  74         struct ieee80211softmac_auth_queue_item *authptr;
  75         int length = 0;
  76
  77 check_assoc_again:
  78         mutex_lock(&sm->associnfo.mutex);
  79         /* Check if we're already associating to this or another network
  80          * If it's another network, cancel and start over with our new network
  81          * If it's our network, ignore the change, we're already doing it!
  82          */
  83         if((sm->associnfo.associating || sm->associnfo.associated) &&
  84            (data->essid.flags && data->essid.length)) {
  85                 /* Get the associating network */
  86                 n = ieee80211softmac_get_network_by_bssid(sm, sm->associnfo.bssid);
  87                 if(n && n->essid.len == data->essid.length &&
  88                    !memcmp(n->essid.data, extra, n->essid.len)) {
  89                         dprintk(KERN_INFO PFX "Already associating or associated to "MAC_FMT"\n",
  90                                 MAC_ARG(sm->associnfo.bssid));
  91                         goto out;
  92                 } else {
  93                         dprintk(KERN_INFO PFX "Canceling existing associate request!\n");
  94                         /* Cancel assoc work */
  95                         cancel_delayed_work(&sm->associnfo.work);
  96                         /* We don't have to do this, but it's a little cleaner */
  97                         list_for_each_entry(authptr, &sm->auth_queue, list)
  98                                 cancel_delayed_work(&authptr->work);
  99                         sm->associnfo.bssvalid = 0;
 100                         sm->associnfo.bssfixed = 0;
 101                         sm->associnfo.associating = 0;
 102                         sm->associnfo.associated = 0;
 103                         /* We must unlock to avoid deadlocks with the assoc workqueue
 104                          * on the associnfo.mutex */
 105                         mutex_unlock(&sm->associnfo.mutex);
 106                         flush_scheduled_work();
 107                         /* Avoid race! Check assoc status again. Maybe someone started an
 108                          * association while we flushed. */
 109                         goto check_assoc_again;
 110                 }
 111         }
 112
 113         sm->associnfo.static_essid = 0;
 114         sm->associnfo.assoc_wait = 0;
 115
 116         if (data->essid.flags && data->essid.length) {
 117                 length = min((int)data->essid.length, IW_ESSID_MAX_SIZE);
 118                 if (length) {
 119                         memcpy(sm->associnfo.req_essid.data, extra, length);
 120                         sm->associnfo.static_essid = 1;
 121                 }
 122         }
 123
 124         /* set our requested ESSID length.
 125          * If applicable, we have already copied the data in */
 126         sm->associnfo.req_essid.len = length;
 127
 128         sm->associnfo.associating = 1;
 129         /* queue lower level code to do work (if necessary) */
 130         schedule_delayed_work(&sm->associnfo.work, 0);
 131 out:
 132         mutex_unlock(&sm->associnfo.mutex);
 133
 134         return 0;
 135 }
 136 EXPORT_SYMBOL_GPL(ieee80211softmac_wx_set_essid);
 137
 138 int
 139 ieee80211softmac_wx_get_essid(struct net_device *net_dev,
 140                               struct iw_request_info *info,
 141                               union iwreq_data *data,
 142                               char *extra)
 143 {
 144         struct ieee80211softmac_device *sm = ieee80211_priv(net_dev);
 145
 146         mutex_lock(&sm->associnfo.mutex);
 147         /* If all fails, return ANY (empty) */
 148         data->essid.length = 0;
 149         data->essid.flags = 0;  /* active */
 150
 151         /* If we have a statically configured ESSID then return it */
 152         if (sm->associnfo.static_essid) {
 153                 data->essid.length = sm->associnfo.req_essid.len;
 154                 data->essid.flags = 1;  /* active */
 155                 memcpy(extra, sm->associnfo.req_essid.data, sm->associnfo.req_essid.len);
 156         }
 157
 158         /* If we're associating/associated, return that */
 159         if (sm->associnfo.associated || sm->associnfo.associating) {
 160                 data->essid.length = sm->associnfo.associate_essid.len;
 161                 data->essid.flags = 1;  /* active */
 162                 memcpy(extra, sm->associnfo.associate_essid.data, sm->associnfo.associate_essid.len);
 163         }
 164         mutex_unlock(&sm->associnfo.mutex);
 165
 166         return 0;
 167 }
 168 EXPORT_SYMBOL_GPL(ieee80211softmac_wx_get_essid);
 169
 170 int
 171 ieee80211softmac_wx_set_rate(struct net_device *net_dev,
 172                              struct iw_request_info *info,
 173                              union iwreq_data *data,
 174                              char *extra)
 175 {
 176         struct ieee80211softmac_device *mac = ieee80211_priv(net_dev);
 177         struct ieee80211_device *ieee = mac->ieee;
 178         unsigned long flags;
 179         s32 in_rate = data->bitrate.value;
 180         u8 rate;
 181         int is_ofdm = 0;
 182         int err = -EINVAL;
 183
 184         if (in_rate == -1) {
 185                 if (ieee->modulation & IEEE80211_OFDM_MODULATION)
 186                         in_rate = 24000000;
 187                 else
 188                         in_rate = 11000000;
 189         }
 190
 191         switch (in_rate) {
 192         case 1000000:
 193                 rate = IEEE80211_CCK_RATE_1MB;
 194                 break;
 195         case 2000000:
 196                 rate = IEEE80211_CCK_RATE_2MB;
 197                 break;
 198         case 5500000:
 199                 rate = IEEE80211_CCK_RATE_5MB;
 200                 break;
 201         case 11000000:
 202                 rate = IEEE80211_CCK_RATE_11MB;
 203                 break;
 204         case 6000000:
 205                 rate = IEEE80211_OFDM_RATE_6MB;
 206                 is_ofdm = 1;
 207                 break;
 208         case 9000000:
 209                 rate = IEEE80211_OFDM_RATE_9MB;
 210                 is_ofdm = 1;
 211                 break;
 212         case 12000000:
 213                 rate = IEEE80211_OFDM_RATE_12MB;
 214                 is_ofdm = 1;
 215                 break;
 216         case 18000000:
 217                 rate = IEEE80211_OFDM_RATE_18MB;
 218                 is_ofdm = 1;
 219                 break;
 220         case 24000000:
 221                 rate = IEEE80211_OFDM_RATE_24MB;
 222                 is_ofdm = 1;
 223                 break;
 224         case 36000000:
 225                 rate = IEEE80211_OFDM_RATE_36MB;
 226                 is_ofdm = 1;
 227                 break;
 228         case 48000000:
 229                 rate = IEEE80211_OFDM_RATE_48MB;
 230                 is_ofdm = 1;
 231                 break;
 232         case 54000000:
 233                 rate = IEEE80211_OFDM_RATE_54MB;
 234                 is_ofdm = 1;
 235                 break;
 236         default:
 237                 goto out;
 238         }
 239
 240         spin_lock_irqsave(&mac->lock, flags);
 241
 242         /* Check if correct modulation for this PHY. */
 243         if (is_ofdm && !(ieee->modulation & IEEE80211_OFDM_MODULATION))
 244                 goto out_unlock;
 245
 246         mac->txrates.user_rate = rate;
 247         ieee80211softmac_recalc_txrates(mac);
 248         err = 0;
 249
 250 out_unlock:
 251         spin_unlock_irqrestore(&mac->lock, flags);
 252 out:
 253         return err;
 254 }
 255 EXPORT_SYMBOL_GPL(ieee80211softmac_wx_set_rate);
 256
 257 int
 258 ieee80211softmac_wx_get_rate(struct net_device *net_dev,
 259                              struct iw_request_info *info,
 260                              union iwreq_data *data,
 261                              char *extra)
 262 {
 263         struct ieee80211softmac_device *mac = ieee80211_priv(net_dev);
 264         unsigned long flags;
 265         int err = -EINVAL;
 266
 267         spin_lock_irqsave(&mac->lock, flags);
 268
 269         if (unlikely(!mac->running)) {
 270                 err = -ENODEV;
 271                 goto out_unlock;
 272         }
 273
 274         switch (mac->txrates.default_rate) {
 275         case IEEE80211_CCK_RATE_1MB:
 276                 data->bitrate.value = 1000000;
 277                 break;
 278         case IEEE80211_CCK_RATE_2MB:
 279                 data->bitrate.value = 2000000;
 280                 break;
 281         case IEEE80211_CCK_RATE_5MB:
 282                 data->bitrate.value = 5500000;
 283                 break;
 284         case IEEE80211_CCK_RATE_11MB:
 285                 data->bitrate.value = 11000000;
 286                 break;
 287         case IEEE80211_OFDM_RATE_6MB:
 288                 data->bitrate.value = 6000000;
 289                 break;
 290         case IEEE80211_OFDM_RATE_9MB:
 291                 data->bitrate.value = 9000000;
 292                 break;
 293         case IEEE80211_OFDM_RATE_12MB:
 294                 data->bitrate.value = 12000000;
 295                 break;
 296         case IEEE80211_OFDM_RATE_18MB:
 297                 data->bitrate.value = 18000000;
 298                 break;
 299         case IEEE80211_OFDM_RATE_24MB:
 300                 data->bitrate.value = 24000000;
 301                 break;
 302         case IEEE80211_OFDM_RATE_36MB:
 303                 data->bitrate.value = 36000000;
 304                 break;
 305         case IEEE80211_OFDM_RATE_48MB:
 306                 data->bitrate.value = 48000000;
 307                 break;
 308         case IEEE80211_OFDM_RATE_54MB:
 309                 data->bitrate.value = 54000000;
 310                 break;
 311         default:
 312                 assert(0);
 313                 goto out_unlock;
 314         }
 315         err = 0;
 316 out_unlock:
 317         spin_unlock_irqrestore(&mac->lock, flags);
 318
 319         return err;
 320 }
 321 EXPORT_SYMBOL_GPL(ieee80211softmac_wx_get_rate);
 322
 323 int
 324 ieee80211softmac_wx_get_wap(struct net_device *net_dev,
 325                             struct iw_request_info *info,
 326                             union iwreq_data *data,
 327                             char *extra)
 328 {
 329         struct ieee80211softmac_device *mac = ieee80211_priv(net_dev);
 330         int err = 0;
 331
 332         mutex_lock(&mac->associnfo.mutex);
 333         if (mac->associnfo.bssvalid)
 334                 memcpy(data->ap_addr.sa_data, mac->associnfo.bssid, ETH_ALEN);
 335         else
 336                 memset(data->ap_addr.sa_data, 0xff, ETH_ALEN);
 337         data->ap_addr.sa_family = ARPHRD_ETHER;
 338         mutex_unlock(&mac->associnfo.mutex);
 339
 340         return err;
 341 }
 342 EXPORT_SYMBOL_GPL(ieee80211softmac_wx_get_wap);
 343
 344 int
 345 ieee80211softmac_wx_set_wap(struct net_device *net_dev,
 346                             struct iw_request_info *info,
 347                             union iwreq_data *data,
 348                             char *extra)
 349 {
 350         struct ieee80211softmac_device *mac = ieee80211_priv(net_dev);
 351
 352         /* sanity check */
 353         if (data->ap_addr.sa_family != ARPHRD_ETHER) {
 354                 return -EINVAL;
 355         }
 356
 357         mutex_lock(&mac->associnfo.mutex);
 358         if (is_broadcast_ether_addr(data->ap_addr.sa_data)) {
 359                 /* the bssid we have is not to be fixed any longer,
 360                  * and we should reassociate to the best AP. */
 361                 mac->associnfo.bssfixed = 0;
 362                 /* force reassociation */
 363                 mac->associnfo.bssvalid = 0;
 364                 if (mac->associnfo.associated)
 365                         schedule_delayed_work(&mac->associnfo.work, 0);
 366         } else if (is_zero_ether_addr(data->ap_addr.sa_data)) {
 367                 /* the bssid we have is no longer fixed */
 368                 mac->associnfo.bssfixed = 0;
 369         } else {
 370                 if (!memcmp(mac->associnfo.bssid, data->ap_addr.sa_data, ETH_ALEN)) {
 371                         if (mac->associnfo.associating || mac->associnfo.associated) {
 372                         /* bssid unchanged and associated or associating - just return */
 373                                 goto out;
 374                         }
 375                 } else {
 376                         /* copy new value in data->ap_addr.sa_data to bssid */
 377                         memcpy(mac->associnfo.bssid, data->ap_addr.sa_data, ETH_ALEN);
 378                 }
 379                 /* tell the other code that this bssid should be used no matter what */
 380                 mac->associnfo.bssfixed = 1;
 381                 /* queue associate if new bssid or (old one again and not associated) */
 382                 schedule_delayed_work(&mac->associnfo.work, 0);
 383         }
 384
 385  out:
 386         mutex_unlock(&mac->associnfo.mutex);
 387
 388         return 0;
 389 }
 390 EXPORT_SYMBOL_GPL(ieee80211softmac_wx_set_wap);
 391
 392 int
 393 ieee80211softmac_wx_set_genie(struct net_device *dev,
 394                               struct iw_request_info *info,
 395                               union iwreq_data *wrqu,
 396                               char *extra)
 397 {
 398         struct ieee80211softmac_device *mac = ieee80211_priv(dev);
 399         unsigned long flags;
 400         int err = 0;
 401         char *buf;
 402         int i;
 403
 404         mutex_lock(&mac->associnfo.mutex);
 405         spin_lock_irqsave(&mac->lock, flags);
 406         /* bleh. shouldn't be locked for that kmalloc... */
 407
 408         if (wrqu->data.length) {
 409                 if ((wrqu->data.length < 2) || (extra[1]+2 != wrqu->data.length)) {
 410                         /* this is an IE, so the length must be
 411                          * correct. Is it possible though that
 412                          * more than one IE is passed in?
 413                          */
 414                         err = -EINVAL;
 415                         goto out;
 416                 }
 417                 if (mac->wpa.IEbuflen <= wrqu->data.length) {
 418                         buf = kmalloc(wrqu->data.length, GFP_ATOMIC);
 419                         if (!buf) {
 420                                 err = -ENOMEM;
 421                                 goto out;
 422                         }
 423                         kfree(mac->wpa.IE);
 424                         mac->wpa.IE = buf;
 425                         mac->wpa.IEbuflen = wrqu->data.length;
 426                 }
 427                 memcpy(mac->wpa.IE, extra, wrqu->data.length);
 428                 dprintk(KERN_INFO PFX "generic IE set to ");
 429                 for (i=0;i<wrqu->data.length;i++)
 430                         dprintk("%.2x", (u8)mac->wpa.IE[i]);
 431                 dprintk("\n");
 432                 mac->wpa.IElen = wrqu->data.length;
 433         } else {
 434                 kfree(mac->wpa.IE);
 435                 mac->wpa.IE = NULL;
 436                 mac->wpa.IElen = 0;
 437                 mac->wpa.IEbuflen = 0;
 438         }
 439
 440  out:
 441         spin_unlock_irqrestore(&mac->lock, flags);
 442         mutex_unlock(&mac->associnfo.mutex);
 443
 444         return err;
 445 }
 446 EXPORT_SYMBOL_GPL(ieee80211softmac_wx_set_genie);
 447
 448 int
 449 ieee80211softmac_wx_get_genie(struct net_device *dev,
 450                               struct iw_request_info *info,
 451                               union iwreq_data *wrqu,
 452                               char *extra)
 453 {
 454         struct ieee80211softmac_device *mac = ieee80211_priv(dev);
 455         unsigned long flags;
 456         int err = 0;
 457         int space = wrqu->data.length;
 458
 459         mutex_lock(&mac->associnfo.mutex);
 460         spin_lock_irqsave(&mac->lock, flags);
 461
 462         wrqu->data.length = 0;
 463
 464         if (mac->wpa.IE && mac->wpa.IElen) {
 465                 wrqu->data.length = mac->wpa.IElen;
 466                 if (mac->wpa.IElen <= space)
 467                         memcpy(extra, mac->wpa.IE, mac->wpa.IElen);
 468                 else
 469                         err = -E2BIG;
 470         }
 471         spin_unlock_irqrestore(&mac->lock, flags);
 472         mutex_unlock(&mac->associnfo.mutex);
 473
 474         return err;
 475 }
 476 EXPORT_SYMBOL_GPL(ieee80211softmac_wx_get_genie);
 477
 478 int
 479 ieee80211softmac_wx_set_mlme(struct net_device *dev,
 480                              struct iw_request_info *info,
 481                              union iwreq_data *wrqu,
 482                              char *extra)
 483 {
 484         struct ieee80211softmac_device *mac = ieee80211_priv(dev);
 485         struct iw_mlme *mlme = (struct iw_mlme *)extra;
 486         u16 reason = cpu_to_le16(mlme->reason_code);
 487         struct ieee80211softmac_network *net;
 488         int err = -EINVAL;
 489
 490         mutex_lock(&mac->associnfo.mutex);
 491
 492         if (memcmp(mac->associnfo.bssid, mlme->addr.sa_data, ETH_ALEN)) {
 493                 printk(KERN_DEBUG PFX "wx_set_mlme: requested operation on net we don't use\n");
 494                 goto out;
 495         }
 496
 497         switch (mlme->cmd) {
 498         case IW_MLME_DEAUTH:
 499                 net = ieee80211softmac_get_network_by_bssid_locked(mac, mlme->addr.sa_data);
 500                 if (!net) {
 501                         printk(KERN_DEBUG PFX "wx_set_mlme: we should know the net here...\n");
 502                         goto out;
 503                 }
 504                 err =  ieee80211softmac_deauth_req(mac, net, reason);
 505                 goto out;
 506         case IW_MLME_DISASSOC:
 507                 ieee80211softmac_send_disassoc_req(mac, reason);
 508                 mac->associnfo.associated = 0;
 509                 mac->associnfo.associating = 0;
 510                 err = 0;
 511                 goto out;
 512         default:
 513                 err = -EOPNOTSUPP;
 514         }
 515
 516 out:
 517         mutex_unlock(&mac->associnfo.mutex);
 518
 519         return err;
 520 }
 521 EXPORT_SYMBOL_GPL(ieee80211softmac_wx_set_mlme);