git.oblomov.eu Git - linux-2.6/blob - net/ieee80211/ieee80211_wx.c

   1 /******************************************************************************
   2
   3   Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
   4
   5   Portions of this file are based on the WEP enablement code provided by the
   6   Host AP project hostap-drivers v0.1.3
   7   Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
   8   <jkmaline@cc.hut.fi>
   9   Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
  10
  11   This program is free software; you can redistribute it and/or modify it
  12   under the terms of version 2 of the GNU General Public License as
  13   published by the Free Software Foundation.
  14
  15   This program is distributed in the hope that it will be useful, but WITHOUT
  16   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  17   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  18   more details.
  19
  20   You should have received a copy of the GNU General Public License along with
  21   this program; if not, write to the Free Software Foundation, Inc., 59
  22   Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  23
  24   The full GNU General Public License is included in this distribution in the
  25   file called LICENSE.
  26
  27   Contact Information:
  28   James P. Ketrenos <ipw2100-admin@linux.intel.com>
  29   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  30
  31 ******************************************************************************/
  32
  33 #include <linux/kmod.h>
  34 #include <linux/module.h>
  35 #include <linux/jiffies.h>
  36
  37 #include <net/ieee80211.h>
  38 #include <linux/wireless.h>
  39
  40 static const char *ieee80211_modes[] = {
  41         "?", "a", "b", "ab", "g", "ag", "bg", "abg"
  42 };
  43
  44 #define MAX_CUSTOM_LEN 64
  45 static inline char *ipw2100_translate_scan(struct ieee80211_device *ieee,
  46                                            char *start, char *stop,
  47                                            struct ieee80211_network *network)
  48 {
  49         char custom[MAX_CUSTOM_LEN];
  50         char *p;
  51         struct iw_event iwe;
  52         int i, j;
  53         u8 max_rate, rate;
  54
  55         /* First entry *MUST* be the AP MAC address */
  56         iwe.cmd = SIOCGIWAP;
  57         iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
  58         memcpy(iwe.u.ap_addr.sa_data, network->bssid, ETH_ALEN);
  59         start = iwe_stream_add_event(start, stop, &iwe, IW_EV_ADDR_LEN);
  60
  61         /* Remaining entries will be displayed in the order we provide them */
  62
  63         /* Add the ESSID */
  64         iwe.cmd = SIOCGIWESSID;
  65         iwe.u.data.flags = 1;
  66         if (network->flags & NETWORK_EMPTY_ESSID) {
  67                 iwe.u.data.length = sizeof("<hidden>");
  68                 start = iwe_stream_add_point(start, stop, &iwe, "<hidden>");
  69         } else {
  70                 iwe.u.data.length = min(network->ssid_len, (u8) 32);
  71                 start = iwe_stream_add_point(start, stop, &iwe, network->ssid);
  72         }
  73
  74         /* Add the protocol name */
  75         iwe.cmd = SIOCGIWNAME;
  76         snprintf(iwe.u.name, IFNAMSIZ, "IEEE 802.11%s",
  77                  ieee80211_modes[network->mode]);
  78         start = iwe_stream_add_event(start, stop, &iwe, IW_EV_CHAR_LEN);
  79
  80         /* Add mode */
  81         iwe.cmd = SIOCGIWMODE;
  82         if (network->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
  83                 if (network->capability & WLAN_CAPABILITY_ESS)
  84                         iwe.u.mode = IW_MODE_MASTER;
  85                 else
  86                         iwe.u.mode = IW_MODE_ADHOC;
  87
  88                 start = iwe_stream_add_event(start, stop, &iwe, IW_EV_UINT_LEN);
  89         }
  90
  91         /* Add frequency/channel */
  92         iwe.cmd = SIOCGIWFREQ;
  93 /*      iwe.u.freq.m = ieee80211_frequency(network->channel, network->mode);
  94         iwe.u.freq.e = 3; */
  95         iwe.u.freq.m = network->channel;
  96         iwe.u.freq.e = 0;
  97         iwe.u.freq.i = 0;
  98         start = iwe_stream_add_event(start, stop, &iwe, IW_EV_FREQ_LEN);
  99
 100         /* Add encryption capability */
 101         iwe.cmd = SIOCGIWENCODE;
 102         if (network->capability & WLAN_CAPABILITY_PRIVACY)
 103                 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
 104         else
 105                 iwe.u.data.flags = IW_ENCODE_DISABLED;
 106         iwe.u.data.length = 0;
 107         start = iwe_stream_add_point(start, stop, &iwe, network->ssid);
 108
 109         /* Add basic and extended rates */
 110         max_rate = 0;
 111         p = custom;
 112         p += snprintf(p, MAX_CUSTOM_LEN - (p - custom), " Rates (Mb/s): ");
 113         for (i = 0, j = 0; i < network->rates_len;) {
 114                 if (j < network->rates_ex_len &&
 115                     ((network->rates_ex[j] & 0x7F) <
 116                      (network->rates[i] & 0x7F)))
 117                         rate = network->rates_ex[j++] & 0x7F;
 118                 else
 119                         rate = network->rates[i++] & 0x7F;
 120                 if (rate > max_rate)
 121                         max_rate = rate;
 122                 p += snprintf(p, MAX_CUSTOM_LEN - (p - custom),
 123                               "%d%s ", rate >> 1, (rate & 1) ? ".5" : "");
 124         }
 125         for (; j < network->rates_ex_len; j++) {
 126                 rate = network->rates_ex[j] & 0x7F;
 127                 p += snprintf(p, MAX_CUSTOM_LEN - (p - custom),
 128                               "%d%s ", rate >> 1, (rate & 1) ? ".5" : "");
 129                 if (rate > max_rate)
 130                         max_rate = rate;
 131         }
 132
 133         iwe.cmd = SIOCGIWRATE;
 134         iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
 135         iwe.u.bitrate.value = max_rate * 500000;
 136         start = iwe_stream_add_event(start, stop, &iwe, IW_EV_PARAM_LEN);
 137
 138         iwe.cmd = IWEVCUSTOM;
 139         iwe.u.data.length = p - custom;
 140         if (iwe.u.data.length)
 141                 start = iwe_stream_add_point(start, stop, &iwe, custom);
 142
 143         /* Add quality statistics */
 144         iwe.cmd = IWEVQUAL;
 145         iwe.u.qual.updated = IW_QUAL_QUAL_UPDATED | IW_QUAL_LEVEL_UPDATED |
 146             IW_QUAL_NOISE_UPDATED;
 147
 148         if (!(network->stats.mask & IEEE80211_STATMASK_RSSI)) {
 149                 iwe.u.qual.updated |= IW_QUAL_QUAL_INVALID |
 150                     IW_QUAL_LEVEL_INVALID;
 151                 iwe.u.qual.qual = 0;
 152                 iwe.u.qual.level = 0;
 153         } else {
 154                 iwe.u.qual.level = network->stats.rssi;
 155                 if (ieee->perfect_rssi == ieee->worst_rssi)
 156                         iwe.u.qual.qual = 100;
 157                 else
 158                         iwe.u.qual.qual =
 159                             (100 *
 160                              (ieee->perfect_rssi - ieee->worst_rssi) *
 161                              (ieee->perfect_rssi - ieee->worst_rssi) -
 162                              (ieee->perfect_rssi - network->stats.rssi) *
 163                              (15 * (ieee->perfect_rssi - ieee->worst_rssi) +
 164                               62 * (ieee->perfect_rssi - network->stats.rssi))) /
 165                             ((ieee->perfect_rssi - ieee->worst_rssi) *
 166                              (ieee->perfect_rssi - ieee->worst_rssi));
 167                 if (iwe.u.qual.qual > 100)
 168                         iwe.u.qual.qual = 100;
 169                 else if (iwe.u.qual.qual < 1)
 170                         iwe.u.qual.qual = 0;
 171         }
 172
 173         if (!(network->stats.mask & IEEE80211_STATMASK_NOISE)) {
 174                 iwe.u.qual.updated |= IW_QUAL_NOISE_INVALID;
 175                 iwe.u.qual.noise = 0;
 176         } else {
 177                 iwe.u.qual.noise = network->stats.noise;
 178         }
 179
 180         start = iwe_stream_add_event(start, stop, &iwe, IW_EV_QUAL_LEN);
 181
 182         iwe.cmd = IWEVCUSTOM;
 183         p = custom;
 184
 185         iwe.u.data.length = p - custom;
 186         if (iwe.u.data.length)
 187                 start = iwe_stream_add_point(start, stop, &iwe, custom);
 188
 189         if (network->wpa_ie_len) {
 190                 char buf[MAX_WPA_IE_LEN * 2 + 30];
 191
 192                 u8 *p = buf;
 193                 p += sprintf(p, "wpa_ie=");
 194                 for (i = 0; i < network->wpa_ie_len; i++) {
 195                         p += sprintf(p, "%02x", network->wpa_ie[i]);
 196                 }
 197
 198                 memset(&iwe, 0, sizeof(iwe));
 199                 iwe.cmd = IWEVCUSTOM;
 200                 iwe.u.data.length = strlen(buf);
 201                 start = iwe_stream_add_point(start, stop, &iwe, buf);
 202         }
 203
 204         if (network->rsn_ie_len) {
 205                 char buf[MAX_WPA_IE_LEN * 2 + 30];
 206
 207                 u8 *p = buf;
 208                 p += sprintf(p, "rsn_ie=");
 209                 for (i = 0; i < network->rsn_ie_len; i++) {
 210                         p += sprintf(p, "%02x", network->rsn_ie[i]);
 211                 }
 212
 213                 memset(&iwe, 0, sizeof(iwe));
 214                 iwe.cmd = IWEVCUSTOM;
 215                 iwe.u.data.length = strlen(buf);
 216                 start = iwe_stream_add_point(start, stop, &iwe, buf);
 217         }
 218
 219         /* Add EXTRA: Age to display seconds since last beacon/probe response
 220          * for given network. */
 221         iwe.cmd = IWEVCUSTOM;
 222         p = custom;
 223         p += snprintf(p, MAX_CUSTOM_LEN - (p - custom),
 224                       " Last beacon: %dms ago",
 225                       jiffies_to_msecs(jiffies - network->last_scanned));
 226         iwe.u.data.length = p - custom;
 227         if (iwe.u.data.length)
 228                 start = iwe_stream_add_point(start, stop, &iwe, custom);
 229
 230         return start;
 231 }
 232
 233 int ieee80211_wx_get_scan(struct ieee80211_device *ieee,
 234                           struct iw_request_info *info,
 235                           union iwreq_data *wrqu, char *extra)
 236 {
 237         struct ieee80211_network *network;
 238         unsigned long flags;
 239
 240         char *ev = extra;
 241         char *stop = ev + IW_SCAN_MAX_DATA;
 242         int i = 0;
 243
 244         IEEE80211_DEBUG_WX("Getting scan\n");
 245
 246         spin_lock_irqsave(&ieee->lock, flags);
 247
 248         list_for_each_entry(network, &ieee->network_list, list) {
 249                 i++;
 250                 if (ieee->scan_age == 0 ||
 251                     time_after(network->last_scanned + ieee->scan_age, jiffies))
 252                         ev = ipw2100_translate_scan(ieee, ev, stop, network);
 253                 else
 254                         IEEE80211_DEBUG_SCAN("Not showing network '%s ("
 255                                              MAC_FMT ")' due to age (%dms).\n",
 256                                              escape_essid(network->ssid,
 257                                                           network->ssid_len),
 258                                              MAC_ARG(network->bssid),
 259                                              jiffies_to_msecs(jiffies -
 260                                                               network->
 261                                                               last_scanned));
 262         }
 263
 264         spin_unlock_irqrestore(&ieee->lock, flags);
 265
 266         wrqu->data.length = ev - extra;
 267         wrqu->data.flags = 0;
 268
 269         IEEE80211_DEBUG_WX("exit: %d networks returned.\n", i);
 270
 271         return 0;
 272 }
 273
 274 int ieee80211_wx_set_encode(struct ieee80211_device *ieee,
 275                             struct iw_request_info *info,
 276                             union iwreq_data *wrqu, char *keybuf)
 277 {
 278         struct iw_point *erq = &(wrqu->encoding);
 279         struct net_device *dev = ieee->dev;
 280         struct ieee80211_security sec = {
 281                 .flags = 0
 282         };
 283         int i, key, key_provided, len;
 284         struct ieee80211_crypt_data **crypt;
 285         int host_crypto = ieee->host_encrypt || ieee->host_decrypt;
 286
 287         IEEE80211_DEBUG_WX("SET_ENCODE\n");
 288
 289         key = erq->flags & IW_ENCODE_INDEX;
 290         if (key) {
 291                 if (key > WEP_KEYS)
 292                         return -EINVAL;
 293                 key--;
 294                 key_provided = 1;
 295         } else {
 296                 key_provided = 0;
 297                 key = ieee->tx_keyidx;
 298         }
 299
 300         IEEE80211_DEBUG_WX("Key: %d [%s]\n", key, key_provided ?
 301                            "provided" : "default");
 302
 303         crypt = &ieee->crypt[key];
 304
 305         if (erq->flags & IW_ENCODE_DISABLED) {
 306                 if (key_provided && *crypt) {
 307                         IEEE80211_DEBUG_WX("Disabling encryption on key %d.\n",
 308                                            key);
 309                         ieee80211_crypt_delayed_deinit(ieee, crypt);
 310                 } else
 311                         IEEE80211_DEBUG_WX("Disabling encryption.\n");
 312
 313                 /* Check all the keys to see if any are still configured,
 314                  * and if no key index was provided, de-init them all */
 315                 for (i = 0; i < WEP_KEYS; i++) {
 316                         if (ieee->crypt[i] != NULL) {
 317                                 if (key_provided)
 318                                         break;
 319                                 ieee80211_crypt_delayed_deinit(ieee,
 320                                                                &ieee->crypt[i]);
 321                         }
 322                 }
 323
 324                 if (i == WEP_KEYS) {
 325                         sec.enabled = 0;
 326                         sec.encrypt = 0;
 327                         sec.level = SEC_LEVEL_0;
 328                         sec.flags |= SEC_ENABLED | SEC_LEVEL | SEC_ENCRYPT;
 329                 }
 330
 331                 goto done;
 332         }
 333
 334         sec.enabled = 1;
 335         sec.encrypt = 1;
 336         sec.flags |= SEC_ENABLED | SEC_ENCRYPT;
 337
 338         if (*crypt != NULL && (*crypt)->ops != NULL &&
 339             strcmp((*crypt)->ops->name, "WEP") != 0) {
 340                 /* changing to use WEP; deinit previously used algorithm
 341                  * on this key */
 342                 ieee80211_crypt_delayed_deinit(ieee, crypt);
 343         }
 344
 345         if (*crypt == NULL && host_crypto) {
 346                 struct ieee80211_crypt_data *new_crypt;
 347
 348                 /* take WEP into use */
 349                 new_crypt = kmalloc(sizeof(struct ieee80211_crypt_data),
 350                                     GFP_KERNEL);
 351                 if (new_crypt == NULL)
 352                         return -ENOMEM;
 353                 memset(new_crypt, 0, sizeof(struct ieee80211_crypt_data));
 354                 new_crypt->ops = ieee80211_get_crypto_ops("WEP");
 355                 if (!new_crypt->ops) {
 356                         request_module("ieee80211_crypt_wep");
 357                         new_crypt->ops = ieee80211_get_crypto_ops("WEP");
 358                 }
 359
 360                 if (new_crypt->ops && try_module_get(new_crypt->ops->owner))
 361                         new_crypt->priv = new_crypt->ops->init(key);
 362
 363                 if (!new_crypt->ops || !new_crypt->priv) {
 364                         kfree(new_crypt);
 365                         new_crypt = NULL;
 366
 367                         printk(KERN_WARNING "%s: could not initialize WEP: "
 368                                "load module ieee80211_crypt_wep\n", dev->name);
 369                         return -EOPNOTSUPP;
 370                 }
 371                 *crypt = new_crypt;
 372         }
 373
 374         /* If a new key was provided, set it up */
 375         if (erq->length > 0) {
 376                 len = erq->length <= 5 ? 5 : 13;
 377                 memcpy(sec.keys[key], keybuf, erq->length);
 378                 if (len > erq->length)
 379                         memset(sec.keys[key] + erq->length, 0,
 380                                len - erq->length);
 381                 IEEE80211_DEBUG_WX("Setting key %d to '%s' (%d:%d bytes)\n",
 382                                    key, escape_essid(sec.keys[key], len),
 383                                    erq->length, len);
 384                 sec.key_sizes[key] = len;
 385                 if (*crypt)
 386                         (*crypt)->ops->set_key(sec.keys[key], len, NULL,
 387                                                (*crypt)->priv);
 388                 sec.flags |= (1 << key);
 389                 /* This ensures a key will be activated if no key is
 390                  * explicitely set */
 391                 if (key == sec.active_key)
 392                         sec.flags |= SEC_ACTIVE_KEY;
 393
 394         } else {
 395                 if (host_crypto) {
 396                         len = (*crypt)->ops->get_key(sec.keys[key], WEP_KEY_LEN,
 397                                                      NULL, (*crypt)->priv);
 398                         if (len == 0) {
 399                                 /* Set a default key of all 0 */
 400                                 IEEE80211_DEBUG_WX("Setting key %d to all "
 401                                                    "zero.\n", key);
 402                                 memset(sec.keys[key], 0, 13);
 403                                 (*crypt)->ops->set_key(sec.keys[key], 13, NULL,
 404                                                        (*crypt)->priv);
 405                                 sec.key_sizes[key] = 13;
 406                                 sec.flags |= (1 << key);
 407                         }
 408                 }
 409                 /* No key data - just set the default TX key index */
 410                 if (key_provided) {
 411                         IEEE80211_DEBUG_WX("Setting key %d to default Tx "
 412                                            "key.\n", key);
 413                         ieee->tx_keyidx = key;
 414                         sec.active_key = key;
 415                         sec.flags |= SEC_ACTIVE_KEY;
 416                 }
 417         }
 418         if (erq->flags & (IW_ENCODE_OPEN | IW_ENCODE_RESTRICTED)) {
 419                 ieee->open_wep = !(erq->flags & IW_ENCODE_RESTRICTED);
 420                 sec.auth_mode = ieee->open_wep ? WLAN_AUTH_OPEN :
 421                     WLAN_AUTH_SHARED_KEY;
 422                 sec.flags |= SEC_AUTH_MODE;
 423                 IEEE80211_DEBUG_WX("Auth: %s\n",
 424                                    sec.auth_mode == WLAN_AUTH_OPEN ?
 425                                    "OPEN" : "SHARED KEY");
 426         }
 427
 428         /* For now we just support WEP, so only set that security level...
 429          * TODO: When WPA is added this is one place that needs to change */
 430         sec.flags |= SEC_LEVEL;
 431         sec.level = SEC_LEVEL_1;        /* 40 and 104 bit WEP */
 432         sec.encode_alg[key] = SEC_ALG_WEP;
 433
 434       done:
 435         if (ieee->set_security)
 436                 ieee->set_security(dev, &sec);
 437
 438         /* Do not reset port if card is in Managed mode since resetting will
 439          * generate new IEEE 802.11 authentication which may end up in looping
 440          * with IEEE 802.1X.  If your hardware requires a reset after WEP
 441          * configuration (for example... Prism2), implement the reset_port in
 442          * the callbacks structures used to initialize the 802.11 stack. */
 443         if (ieee->reset_on_keychange &&
 444             ieee->iw_mode != IW_MODE_INFRA &&
 445             ieee->reset_port && ieee->reset_port(dev)) {
 446                 printk(KERN_DEBUG "%s: reset_port failed\n", dev->name);
 447                 return -EINVAL;
 448         }
 449         return 0;
 450 }
 451
 452 int ieee80211_wx_get_encode(struct ieee80211_device *ieee,
 453                             struct iw_request_info *info,
 454                             union iwreq_data *wrqu, char *keybuf)
 455 {
 456         struct iw_point *erq = &(wrqu->encoding);
 457         int len, key;
 458         struct ieee80211_crypt_data *crypt;
 459         struct ieee80211_security *sec = &ieee->sec;
 460
 461         IEEE80211_DEBUG_WX("GET_ENCODE\n");
 462
 463         key = erq->flags & IW_ENCODE_INDEX;
 464         if (key) {
 465                 if (key > WEP_KEYS)
 466                         return -EINVAL;
 467                 key--;
 468         } else
 469                 key = ieee->tx_keyidx;
 470
 471         crypt = ieee->crypt[key];
 472         erq->flags = key + 1;
 473
 474         if (!sec->enabled) {
 475                 erq->length = 0;
 476                 erq->flags |= IW_ENCODE_DISABLED;
 477                 return 0;
 478         }
 479
 480         len = sec->key_sizes[key];
 481         memcpy(keybuf, sec->keys[key], len);
 482
 483         erq->length = (len >= 0 ? len : 0);
 484         erq->flags |= IW_ENCODE_ENABLED;
 485
 486         if (ieee->open_wep)
 487                 erq->flags |= IW_ENCODE_OPEN;
 488         else
 489                 erq->flags |= IW_ENCODE_RESTRICTED;
 490
 491         return 0;
 492 }
 493
 494 int ieee80211_wx_set_encodeext(struct ieee80211_device *ieee,
 495                                struct iw_request_info *info,
 496                                union iwreq_data *wrqu, char *extra)
 497 {
 498         struct net_device *dev = ieee->dev;
 499         struct iw_point *encoding = &wrqu->encoding;
 500         struct iw_encode_ext *ext = (struct iw_encode_ext *)extra;
 501         int i, idx, ret = 0;
 502         int group_key = 0;
 503         const char *alg, *module;
 504         struct ieee80211_crypto_ops *ops;
 505         struct ieee80211_crypt_data **crypt;
 506
 507         struct ieee80211_security sec = {
 508                 .flags = 0,
 509         };
 510
 511         idx = encoding->flags & IW_ENCODE_INDEX;
 512         if (idx) {
 513                 if (idx < 1 || idx > WEP_KEYS)
 514                         return -EINVAL;
 515                 idx--;
 516         } else
 517                 idx = ieee->tx_keyidx;
 518
 519         if (ext->ext_flags & IW_ENCODE_EXT_GROUP_KEY) {
 520                 crypt = &ieee->crypt[idx];
 521                 group_key = 1;
 522         } else {
 523                 if (idx != 0)
 524                         return -EINVAL;
 525                 if (ieee->iw_mode == IW_MODE_INFRA)
 526                         crypt = &ieee->crypt[idx];
 527                 else
 528                         return -EINVAL;
 529         }
 530
 531         sec.flags |= SEC_ENABLED | SEC_ENCRYPT;
 532         if ((encoding->flags & IW_ENCODE_DISABLED) ||
 533             ext->alg == IW_ENCODE_ALG_NONE) {
 534                 if (*crypt)
 535                         ieee80211_crypt_delayed_deinit(ieee, crypt);
 536
 537                 for (i = 0; i < WEP_KEYS; i++)
 538                         if (ieee->crypt[i] != NULL)
 539                                 break;
 540
 541                 if (i == WEP_KEYS) {
 542                         sec.enabled = 0;
 543                         sec.encrypt = 0;
 544                         sec.level = SEC_LEVEL_0;
 545                         sec.flags |= SEC_LEVEL;
 546                 }
 547                 goto done;
 548         }
 549
 550         sec.enabled = 1;
 551         sec.encrypt = 1;
 552
 553         if (group_key ? !ieee->host_mc_decrypt :
 554             !(ieee->host_encrypt || ieee->host_decrypt ||
 555               ieee->host_encrypt_msdu))
 556                 goto skip_host_crypt;
 557
 558         switch (ext->alg) {
 559         case IW_ENCODE_ALG_WEP:
 560                 alg = "WEP";
 561                 module = "ieee80211_crypt_wep";
 562                 break;
 563         case IW_ENCODE_ALG_TKIP:
 564                 alg = "TKIP";
 565                 module = "ieee80211_crypt_tkip";
 566                 break;
 567         case IW_ENCODE_ALG_CCMP:
 568                 alg = "CCMP";
 569                 module = "ieee80211_crypt_ccmp";
 570                 break;
 571         default:
 572                 IEEE80211_DEBUG_WX("%s: unknown crypto alg %d\n",
 573                                    dev->name, ext->alg);
 574                 ret = -EINVAL;
 575                 goto done;
 576         }
 577
 578         ops = ieee80211_get_crypto_ops(alg);
 579         if (ops == NULL) {
 580                 request_module(module);
 581                 ops = ieee80211_get_crypto_ops(alg);
 582         }
 583         if (ops == NULL) {
 584                 IEEE80211_DEBUG_WX("%s: unknown crypto alg %d\n",
 585                                    dev->name, ext->alg);
 586                 ret = -EINVAL;
 587                 goto done;
 588         }
 589
 590         if (*crypt == NULL || (*crypt)->ops != ops) {
 591                 struct ieee80211_crypt_data *new_crypt;
 592
 593                 ieee80211_crypt_delayed_deinit(ieee, crypt);
 594
 595                 new_crypt = (struct ieee80211_crypt_data *)
 596                     kmalloc(sizeof(*new_crypt), GFP_KERNEL);
 597                 if (new_crypt == NULL) {
 598                         ret = -ENOMEM;
 599                         goto done;
 600                 }
 601                 memset(new_crypt, 0, sizeof(struct ieee80211_crypt_data));
 602                 new_crypt->ops = ops;
 603                 if (new_crypt->ops && try_module_get(new_crypt->ops->owner))
 604                         new_crypt->priv = new_crypt->ops->init(idx);
 605                 if (new_crypt->priv == NULL) {
 606                         kfree(new_crypt);
 607                         ret = -EINVAL;
 608                         goto done;
 609                 }
 610                 *crypt = new_crypt;
 611         }
 612
 613         if (ext->key_len > 0 && (*crypt)->ops->set_key &&
 614             (*crypt)->ops->set_key(ext->key, ext->key_len, ext->rx_seq,
 615                                    (*crypt)->priv) < 0) {
 616                 IEEE80211_DEBUG_WX("%s: key setting failed\n", dev->name);
 617                 ret = -EINVAL;
 618                 goto done;
 619         }
 620
 621       skip_host_crypt:
 622         if (ext->ext_flags & IW_ENCODE_EXT_SET_TX_KEY) {
 623                 ieee->tx_keyidx = idx;
 624                 sec.active_key = idx;
 625                 sec.flags |= SEC_ACTIVE_KEY;
 626         }
 627
 628         if (ext->alg != IW_ENCODE_ALG_NONE) {
 629                 memcpy(sec.keys[idx], ext->key, ext->key_len);
 630                 sec.key_sizes[idx] = ext->key_len;
 631                 sec.flags |= (1 << idx);
 632                 if (ext->alg == IW_ENCODE_ALG_WEP) {
 633                         sec.encode_alg[idx] = SEC_ALG_WEP;
 634                         sec.flags |= SEC_LEVEL;
 635                         sec.level = SEC_LEVEL_1;
 636                 } else if (ext->alg == IW_ENCODE_ALG_TKIP) {
 637                         sec.encode_alg[idx] = SEC_ALG_TKIP;
 638                         sec.flags |= SEC_LEVEL;
 639                         sec.level = SEC_LEVEL_2;
 640                 } else if (ext->alg == IW_ENCODE_ALG_CCMP) {
 641                         sec.encode_alg[idx] = SEC_ALG_CCMP;
 642                         sec.flags |= SEC_LEVEL;
 643                         sec.level = SEC_LEVEL_3;
 644                 }
 645                 /* Don't set sec level for group keys. */
 646                 if (group_key)
 647                         sec.flags &= ~SEC_LEVEL;
 648         }
 649       done:
 650         if (ieee->set_security)
 651                 ieee->set_security(ieee->dev, &sec);
 652
 653         /*
 654          * Do not reset port if card is in Managed mode since resetting will
 655          * generate new IEEE 802.11 authentication which may end up in looping
 656          * with IEEE 802.1X. If your hardware requires a reset after WEP
 657          * configuration (for example... Prism2), implement the reset_port in
 658          * the callbacks structures used to initialize the 802.11 stack.
 659          */
 660         if (ieee->reset_on_keychange &&
 661             ieee->iw_mode != IW_MODE_INFRA &&
 662             ieee->reset_port && ieee->reset_port(dev)) {
 663                 IEEE80211_DEBUG_WX("%s: reset_port failed\n", dev->name);
 664                 return -EINVAL;
 665         }
 666
 667         return ret;
 668 }
 669
 670 int ieee80211_wx_get_encodeext(struct ieee80211_device *ieee,
 671                                struct iw_request_info *info,
 672                                union iwreq_data *wrqu, char *extra)
 673 {
 674         struct iw_point *encoding = &wrqu->encoding;
 675         struct iw_encode_ext *ext = (struct iw_encode_ext *)extra;
 676         struct ieee80211_security *sec = &ieee->sec;
 677         int idx, max_key_len;
 678
 679         max_key_len = encoding->length - sizeof(*ext);
 680         if (max_key_len < 0)
 681                 return -EINVAL;
 682
 683         idx = encoding->flags & IW_ENCODE_INDEX;
 684         if (idx) {
 685                 if (idx < 1 || idx > WEP_KEYS)
 686                         return -EINVAL;
 687                 idx--;
 688         } else
 689                 idx = ieee->tx_keyidx;
 690
 691         if (!ext->ext_flags & IW_ENCODE_EXT_GROUP_KEY)
 692                 if (idx != 0 || ieee->iw_mode != IW_MODE_INFRA)
 693                         return -EINVAL;
 694
 695         encoding->flags = idx + 1;
 696         memset(ext, 0, sizeof(*ext));
 697
 698         if (!sec->enabled) {
 699                 ext->alg = IW_ENCODE_ALG_NONE;
 700                 ext->key_len = 0;
 701                 encoding->flags |= IW_ENCODE_DISABLED;
 702         } else {
 703                 if (sec->encode_alg[idx] == SEC_ALG_WEP)
 704                         ext->alg = IW_ENCODE_ALG_WEP;
 705                 else if (sec->encode_alg[idx] == SEC_ALG_TKIP)
 706                         ext->alg = IW_ENCODE_ALG_TKIP;
 707                 else if (sec->encode_alg[idx] == SEC_ALG_CCMP)
 708                         ext->alg = IW_ENCODE_ALG_CCMP;
 709                 else
 710                         return -EINVAL;
 711
 712                 ext->key_len = sec->key_sizes[idx];
 713                 memcpy(ext->key, sec->keys[idx], ext->key_len);
 714                 encoding->flags |= IW_ENCODE_ENABLED;
 715                 if (ext->key_len &&
 716                     (ext->alg == IW_ENCODE_ALG_TKIP ||
 717                      ext->alg == IW_ENCODE_ALG_CCMP))
 718                         ext->ext_flags |= IW_ENCODE_EXT_TX_SEQ_VALID;
 719
 720         }
 721
 722         return 0;
 723 }
 724
 725 EXPORT_SYMBOL(ieee80211_wx_set_encodeext);
 726 EXPORT_SYMBOL(ieee80211_wx_get_encodeext);
 727
 728 EXPORT_SYMBOL(ieee80211_wx_get_scan);
 729 EXPORT_SYMBOL(ieee80211_wx_set_encode);
 730 EXPORT_SYMBOL(ieee80211_wx_get_encode);