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