drivers/net/wireless/intel/ipw2x00/libipw_wx.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /******************************************************************************
   3
   4   Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
   5
   6   Portions of this file are based on the WEP enablement code provided by the
   7   Host AP project hostap-drivers v0.1.3
   8   Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
   9   <j@w1.fi>
  10   Copyright (c) 2002-2003, Jouni Malinen <j@w1.fi>
  11
  12
  13   Contact Information:
  14   Intel Linux Wireless <ilw@linux.intel.com>
  15   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  16
  17 ******************************************************************************/
  18
  19 #include <linux/hardirq.h>
  20 #include <linux/kmod.h>
  21 #include <linux/slab.h>
  22 #include <linux/module.h>
  23 #include <linux/jiffies.h>
  24
  25 #include <net/lib80211.h>
  26 #include <linux/wireless.h>
  27
  28 #include "libipw.h"
  29
  30 static const char *libipw_modes[] = {
  31         "?", "a", "b", "ab", "g", "ag", "bg", "abg"
  32 };
  33
  34 static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
  35 {
  36         unsigned long end = jiffies;
  37
  38         if (end >= start)
  39                 return jiffies_to_msecs(end - start);
  40
  41         return jiffies_to_msecs(end + (MAX_JIFFY_OFFSET - start) + 1);
  42 }
  43
  44 #define MAX_CUSTOM_LEN 64
  45 static char *libipw_translate_scan(struct libipw_device *ieee,
  46                                       char *start, char *stop,
  47                                       struct libipw_network *network,
  48                                       struct iw_request_info *info)
  49 {
  50         char custom[MAX_CUSTOM_LEN];
  51         char *p;
  52         struct iw_event iwe;
  53         int i, j;
  54         char *current_val;      /* For rates */
  55         u8 rate;
  56
  57         /* First entry *MUST* be the AP MAC address */
  58         iwe.cmd = SIOCGIWAP;
  59         iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
  60         memcpy(iwe.u.ap_addr.sa_data, network->bssid, ETH_ALEN);
  61         start = iwe_stream_add_event(info, start, stop, &iwe, IW_EV_ADDR_LEN);
  62
  63         /* Remaining entries will be displayed in the order we provide them */
  64
  65         /* Add the ESSID */
  66         iwe.cmd = SIOCGIWESSID;
  67         iwe.u.data.flags = 1;
  68         iwe.u.data.length = min(network->ssid_len, (u8) 32);
  69         start = iwe_stream_add_point(info, start, stop,
  70                                      &iwe, network->ssid);
  71
  72         /* Add the protocol name */
  73         iwe.cmd = SIOCGIWNAME;
  74         snprintf(iwe.u.name, IFNAMSIZ, "IEEE 802.11%s",
  75                  libipw_modes[network->mode]);
  76         start = iwe_stream_add_event(info, start, stop, &iwe, IW_EV_CHAR_LEN);
  77
  78         /* Add mode */
  79         iwe.cmd = SIOCGIWMODE;
  80         if (network->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
  81                 if (network->capability & WLAN_CAPABILITY_ESS)
  82                         iwe.u.mode = IW_MODE_MASTER;
  83                 else
  84                         iwe.u.mode = IW_MODE_ADHOC;
  85
  86                 start = iwe_stream_add_event(info, start, stop,
  87                                              &iwe, IW_EV_UINT_LEN);
  88         }
  89
  90         /* Add channel and frequency */
  91         /* Note : userspace automatically computes channel using iwrange */
  92         iwe.cmd = SIOCGIWFREQ;
  93         iwe.u.freq.m = libipw_channel_to_freq(ieee, network->channel);
  94         iwe.u.freq.e = 6;
  95         iwe.u.freq.i = 0;
  96         start = iwe_stream_add_event(info, start, stop, &iwe, IW_EV_FREQ_LEN);
  97
  98         /* Add encryption capability */
  99         iwe.cmd = SIOCGIWENCODE;
 100         if (network->capability & WLAN_CAPABILITY_PRIVACY)
 101                 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
 102         else
 103                 iwe.u.data.flags = IW_ENCODE_DISABLED;
 104         iwe.u.data.length = 0;
 105         start = iwe_stream_add_point(info, start, stop,
 106                                      &iwe, network->ssid);
 107
 108         /* Add basic and extended rates */
 109         /* Rate : stuffing multiple values in a single event require a bit
 110          * more of magic - Jean II */
 111         current_val = start + iwe_stream_lcp_len(info);
 112         iwe.cmd = SIOCGIWRATE;
 113         /* Those two flags are ignored... */
 114         iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
 115
 116         for (i = 0, j = 0; i < network->rates_len;) {
 117                 if (j < network->rates_ex_len &&
 118                     ((network->rates_ex[j] & 0x7F) <
 119                      (network->rates[i] & 0x7F)))
 120                         rate = network->rates_ex[j++] & 0x7F;
 121                 else
 122                         rate = network->rates[i++] & 0x7F;
 123                 /* Bit rate given in 500 kb/s units (+ 0x80) */
 124                 iwe.u.bitrate.value = ((rate & 0x7f) * 500000);
 125                 /* Add new value to event */
 126                 current_val = iwe_stream_add_value(info, start, current_val,
 127                                                    stop, &iwe, IW_EV_PARAM_LEN);
 128         }
 129         for (; j < network->rates_ex_len; j++) {
 130                 rate = network->rates_ex[j] & 0x7F;
 131                 /* Bit rate given in 500 kb/s units (+ 0x80) */
 132                 iwe.u.bitrate.value = ((rate & 0x7f) * 500000);
 133                 /* Add new value to event */
 134                 current_val = iwe_stream_add_value(info, start, current_val,
 135                                                    stop, &iwe, IW_EV_PARAM_LEN);
 136         }
 137         /* Check if we added any rate */
 138         if ((current_val - start) > iwe_stream_lcp_len(info))
 139                 start = current_val;
 140
 141         /* Add quality statistics */
 142         iwe.cmd = IWEVQUAL;
 143         iwe.u.qual.updated = IW_QUAL_QUAL_UPDATED | IW_QUAL_LEVEL_UPDATED |
 144             IW_QUAL_NOISE_UPDATED;
 145
 146         if (!(network->stats.mask & LIBIPW_STATMASK_RSSI)) {
 147                 iwe.u.qual.updated |= IW_QUAL_QUAL_INVALID |
 148                     IW_QUAL_LEVEL_INVALID;
 149                 iwe.u.qual.qual = 0;
 150         } else {
 151                 if (ieee->perfect_rssi == ieee->worst_rssi)
 152                         iwe.u.qual.qual = 100;
 153                 else
 154                         iwe.u.qual.qual =
 155                             (100 *
 156                              (ieee->perfect_rssi - ieee->worst_rssi) *
 157                              (ieee->perfect_rssi - ieee->worst_rssi) -
 158                              (ieee->perfect_rssi - network->stats.rssi) *
 159                              (15 * (ieee->perfect_rssi - ieee->worst_rssi) +
 160                               62 * (ieee->perfect_rssi -
 161                                     network->stats.rssi))) /
 162                             ((ieee->perfect_rssi -
 163                               ieee->worst_rssi) * (ieee->perfect_rssi -
 164                                                    ieee->worst_rssi));
 165                 if (iwe.u.qual.qual > 100)
 166                         iwe.u.qual.qual = 100;
 167                 else if (iwe.u.qual.qual < 1)
 168                         iwe.u.qual.qual = 0;
 169         }
 170
 171         if (!(network->stats.mask & LIBIPW_STATMASK_NOISE)) {
 172                 iwe.u.qual.updated |= IW_QUAL_NOISE_INVALID;
 173                 iwe.u.qual.noise = 0;
 174         } else {
 175                 iwe.u.qual.noise = network->stats.noise;
 176         }
 177
 178         if (!(network->stats.mask & LIBIPW_STATMASK_SIGNAL)) {
 179                 iwe.u.qual.updated |= IW_QUAL_LEVEL_INVALID;
 180                 iwe.u.qual.level = 0;
 181         } else {
 182                 iwe.u.qual.level = network->stats.signal;
 183         }
 184
 185         start = iwe_stream_add_event(info, start, stop, &iwe, IW_EV_QUAL_LEN);
 186
 187         iwe.cmd = IWEVCUSTOM;
 188         p = custom;
 189
 190         iwe.u.data.length = p - custom;
 191         if (iwe.u.data.length)
 192                 start = iwe_stream_add_point(info, start, stop, &iwe, custom);
 193
 194         memset(&iwe, 0, sizeof(iwe));
 195         if (network->wpa_ie_len) {
 196                 char buf[MAX_WPA_IE_LEN];
 197                 memcpy(buf, network->wpa_ie, network->wpa_ie_len);
 198                 iwe.cmd = IWEVGENIE;
 199                 iwe.u.data.length = network->wpa_ie_len;
 200                 start = iwe_stream_add_point(info, start, stop, &iwe, buf);
 201         }
 202
 203         memset(&iwe, 0, sizeof(iwe));
 204         if (network->rsn_ie_len) {
 205                 char buf[MAX_WPA_IE_LEN];
 206                 memcpy(buf, network->rsn_ie, network->rsn_ie_len);
 207                 iwe.cmd = IWEVGENIE;
 208                 iwe.u.data.length = network->rsn_ie_len;
 209                 start = iwe_stream_add_point(info, start, stop, &iwe, buf);
 210         }
 211
 212         /* Add EXTRA: Age to display seconds since last beacon/probe response
 213          * for given network. */
 214         iwe.cmd = IWEVCUSTOM;
 215         p = custom;
 216         p += scnprintf(p, MAX_CUSTOM_LEN - (p - custom),
 217                       " Last beacon: %ums ago",
 218                       elapsed_jiffies_msecs(network->last_scanned));
 219         iwe.u.data.length = p - custom;
 220         if (iwe.u.data.length)
 221                 start = iwe_stream_add_point(info, start, stop, &iwe, custom);
 222
 223         /* Add spectrum management information */
 224         iwe.cmd = -1;
 225         p = custom;
 226         p += scnprintf(p, MAX_CUSTOM_LEN - (p - custom), " Channel flags: ");
 227
 228         if (libipw_get_channel_flags(ieee, network->channel) &
 229             LIBIPW_CH_INVALID) {
 230                 iwe.cmd = IWEVCUSTOM;
 231                 p += scnprintf(p, MAX_CUSTOM_LEN - (p - custom), "INVALID ");
 232         }
 233
 234         if (libipw_get_channel_flags(ieee, network->channel) &
 235             LIBIPW_CH_RADAR_DETECT) {
 236                 iwe.cmd = IWEVCUSTOM;
 237                 p += scnprintf(p, MAX_CUSTOM_LEN - (p - custom), "DFS ");
 238         }
 239
 240         if (iwe.cmd == IWEVCUSTOM) {
 241                 iwe.u.data.length = p - custom;
 242                 start = iwe_stream_add_point(info, start, stop, &iwe, custom);
 243         }
 244
 245         return start;
 246 }
 247
 248 #define SCAN_ITEM_SIZE 128
 249
 250 int libipw_wx_get_scan(struct libipw_device *ieee,
 251                           struct iw_request_info *info,
 252                           union iwreq_data *wrqu, char *extra)
 253 {
 254         struct libipw_network *network;
 255         unsigned long flags;
 256         int err = 0;
 257
 258         char *ev = extra;
 259         char *stop = ev + wrqu->data.length;
 260         int i = 0;
 261
 262         LIBIPW_DEBUG_WX("Getting scan\n");
 263
 264         spin_lock_irqsave(&ieee->lock, flags);
 265
 266         list_for_each_entry(network, &ieee->network_list, list) {
 267                 i++;
 268                 if (stop - ev < SCAN_ITEM_SIZE) {
 269                         err = -E2BIG;
 270                         break;
 271                 }
 272
 273                 if (ieee->scan_age == 0 ||
 274                     time_after(network->last_scanned + ieee->scan_age, jiffies))
 275                         ev = libipw_translate_scan(ieee, ev, stop, network,
 276                                                       info);
 277                 else {
 278                         LIBIPW_DEBUG_SCAN("Not showing network '%*pE (%pM)' due to age (%ums).\n",
 279                                           network->ssid_len, network->ssid,
 280                                           network->bssid,
 281                                           elapsed_jiffies_msecs(
 282                                                        network->last_scanned));
 283                 }
 284         }
 285
 286         spin_unlock_irqrestore(&ieee->lock, flags);
 287
 288         wrqu->data.length = ev - extra;
 289         wrqu->data.flags = 0;
 290
 291         LIBIPW_DEBUG_WX("exit: %d networks returned.\n", i);
 292
 293         return err;
 294 }
 295
 296 int libipw_wx_set_encode(struct libipw_device *ieee,
 297                             struct iw_request_info *info,
 298                             union iwreq_data *wrqu, char *keybuf)
 299 {
 300         struct iw_point *erq = &(wrqu->encoding);
 301         struct net_device *dev = ieee->dev;
 302         struct libipw_security sec = {
 303                 .flags = 0
 304         };
 305         int i, key, key_provided, len;
 306         struct lib80211_crypt_data **crypt;
 307         int host_crypto = ieee->host_encrypt || ieee->host_decrypt;
 308
 309         LIBIPW_DEBUG_WX("SET_ENCODE\n");
 310
 311         key = erq->flags & IW_ENCODE_INDEX;
 312         if (key) {
 313                 if (key > WEP_KEYS)
 314                         return -EINVAL;
 315                 key--;
 316                 key_provided = 1;
 317         } else {
 318                 key_provided = 0;
 319                 key = ieee->crypt_info.tx_keyidx;
 320         }
 321
 322         LIBIPW_DEBUG_WX("Key: %d [%s]\n", key, key_provided ?
 323                            "provided" : "default");
 324
 325         crypt = &ieee->crypt_info.crypt[key];
 326
 327         if (erq->flags & IW_ENCODE_DISABLED) {
 328                 if (key_provided && *crypt) {
 329                         LIBIPW_DEBUG_WX("Disabling encryption on key %d.\n",
 330                                            key);
 331                         lib80211_crypt_delayed_deinit(&ieee->crypt_info, crypt);
 332                 } else
 333                         LIBIPW_DEBUG_WX("Disabling encryption.\n");
 334
 335                 /* Check all the keys to see if any are still configured,
 336                  * and if no key index was provided, de-init them all */
 337                 for (i = 0; i < WEP_KEYS; i++) {
 338                         if (ieee->crypt_info.crypt[i] != NULL) {
 339                                 if (key_provided)
 340                                         break;
 341                                 lib80211_crypt_delayed_deinit(&ieee->crypt_info,
 342                                                                &ieee->crypt_info.crypt[i]);
 343                         }
 344                 }
 345
 346                 if (i == WEP_KEYS) {
 347                         sec.enabled = 0;
 348                         sec.encrypt = 0;
 349                         sec.level = SEC_LEVEL_0;
 350                         sec.flags |= SEC_ENABLED | SEC_LEVEL | SEC_ENCRYPT;
 351                 }
 352
 353                 goto done;
 354         }
 355
 356         sec.enabled = 1;
 357         sec.encrypt = 1;
 358         sec.flags |= SEC_ENABLED | SEC_ENCRYPT;
 359
 360         if (*crypt != NULL && (*crypt)->ops != NULL &&
 361             strcmp((*crypt)->ops->name, "WEP") != 0) {
 362                 /* changing to use WEP; deinit previously used algorithm
 363                  * on this key */
 364                 lib80211_crypt_delayed_deinit(&ieee->crypt_info, crypt);
 365         }
 366
 367         if (*crypt == NULL && host_crypto) {
 368                 struct lib80211_crypt_data *new_crypt;
 369
 370                 /* take WEP into use */
 371                 new_crypt = kzalloc(sizeof(struct lib80211_crypt_data),
 372                                     GFP_KERNEL);
 373                 if (new_crypt == NULL)
 374                         return -ENOMEM;
 375                 new_crypt->ops = lib80211_get_crypto_ops("WEP");
 376                 if (!new_crypt->ops) {
 377                         request_module("lib80211_crypt_wep");
 378                         new_crypt->ops = lib80211_get_crypto_ops("WEP");
 379                 }
 380
 381                 if (new_crypt->ops && try_module_get(new_crypt->ops->owner))
 382                         new_crypt->priv = new_crypt->ops->init(key);
 383
 384                 if (!new_crypt->ops || !new_crypt->priv) {
 385                         kfree(new_crypt);
 386                         new_crypt = NULL;
 387
 388                         printk(KERN_WARNING "%s: could not initialize WEP: "
 389                                "load module lib80211_crypt_wep\n", dev->name);
 390                         return -EOPNOTSUPP;
 391                 }
 392                 *crypt = new_crypt;
 393         }
 394
 395         /* If a new key was provided, set it up */
 396         if (erq->length > 0) {
 397                 len = erq->length <= 5 ? 5 : 13;
 398                 memcpy(sec.keys[key], keybuf, erq->length);
 399                 if (len > erq->length)
 400                         memset(sec.keys[key] + erq->length, 0,
 401                                len - erq->length);
 402                 LIBIPW_DEBUG_WX("Setting key %d to '%*pE' (%d:%d bytes)\n",
 403                                    key, len, sec.keys[key],
 404                                    erq->length, len);
 405                 sec.key_sizes[key] = len;
 406                 if (*crypt)
 407                         (*crypt)->ops->set_key(sec.keys[key], len, NULL,
 408                                                (*crypt)->priv);
 409                 sec.flags |= (1 << key);
 410                 /* This ensures a key will be activated if no key is
 411                  * explicitly set */
 412                 if (key == sec.active_key)
 413                         sec.flags |= SEC_ACTIVE_KEY;
 414
 415         } else {
 416                 if (host_crypto) {
 417                         len = (*crypt)->ops->get_key(sec.keys[key], WEP_KEY_LEN,
 418                                                      NULL, (*crypt)->priv);
 419                         if (len == 0) {
 420                                 /* Set a default key of all 0 */
 421                                 LIBIPW_DEBUG_WX("Setting key %d to all "
 422                                                    "zero.\n", key);
 423                                 memset(sec.keys[key], 0, 13);
 424                                 (*crypt)->ops->set_key(sec.keys[key], 13, NULL,
 425                                                        (*crypt)->priv);
 426                                 sec.key_sizes[key] = 13;
 427                                 sec.flags |= (1 << key);
 428                         }
 429                 }
 430                 /* No key data - just set the default TX key index */
 431                 if (key_provided) {
 432                         LIBIPW_DEBUG_WX("Setting key %d to default Tx "
 433                                            "key.\n", key);
 434                         ieee->crypt_info.tx_keyidx = key;
 435                         sec.active_key = key;
 436                         sec.flags |= SEC_ACTIVE_KEY;
 437                 }
 438         }
 439         if (erq->flags & (IW_ENCODE_OPEN | IW_ENCODE_RESTRICTED)) {
 440                 ieee->open_wep = !(erq->flags & IW_ENCODE_RESTRICTED);
 441                 sec.auth_mode = ieee->open_wep ? WLAN_AUTH_OPEN :
 442                     WLAN_AUTH_SHARED_KEY;
 443                 sec.flags |= SEC_AUTH_MODE;
 444                 LIBIPW_DEBUG_WX("Auth: %s\n",
 445                                    sec.auth_mode == WLAN_AUTH_OPEN ?
 446                                    "OPEN" : "SHARED KEY");
 447         }
 448
 449         /* For now we just support WEP, so only set that security level...
 450          * TODO: When WPA is added this is one place that needs to change */
 451         sec.flags |= SEC_LEVEL;
 452         sec.level = SEC_LEVEL_1;        /* 40 and 104 bit WEP */
 453         sec.encode_alg[key] = SEC_ALG_WEP;
 454
 455       done:
 456         if (ieee->set_security)
 457                 ieee->set_security(dev, &sec);
 458
 459         return 0;
 460 }
 461
 462 int libipw_wx_get_encode(struct libipw_device *ieee,
 463                             struct iw_request_info *info,
 464                             union iwreq_data *wrqu, char *keybuf)
 465 {
 466         struct iw_point *erq = &(wrqu->encoding);
 467         int len, key;
 468         struct libipw_security *sec = &ieee->sec;
 469
 470         LIBIPW_DEBUG_WX("GET_ENCODE\n");
 471
 472         key = erq->flags & IW_ENCODE_INDEX;
 473         if (key) {
 474                 if (key > WEP_KEYS)
 475                         return -EINVAL;
 476                 key--;
 477         } else
 478                 key = ieee->crypt_info.tx_keyidx;
 479
 480         erq->flags = key + 1;
 481
 482         if (!sec->enabled) {
 483                 erq->length = 0;
 484                 erq->flags |= IW_ENCODE_DISABLED;
 485                 return 0;
 486         }
 487
 488         len = sec->key_sizes[key];
 489         memcpy(keybuf, sec->keys[key], len);
 490
 491         erq->length = len;
 492         erq->flags |= IW_ENCODE_ENABLED;
 493
 494         if (ieee->open_wep)
 495                 erq->flags |= IW_ENCODE_OPEN;
 496         else
 497                 erq->flags |= IW_ENCODE_RESTRICTED;
 498
 499         return 0;
 500 }
 501
 502 int libipw_wx_set_encodeext(struct libipw_device *ieee,
 503                                struct iw_request_info *info,
 504                                union iwreq_data *wrqu, char *extra)
 505 {
 506         struct net_device *dev = ieee->dev;
 507         struct iw_point *encoding = &wrqu->encoding;
 508         struct iw_encode_ext *ext = (struct iw_encode_ext *)extra;
 509         int i, idx, ret = 0;
 510         int group_key = 0;
 511         const char *alg, *module;
 512         struct lib80211_crypto_ops *ops;
 513         struct lib80211_crypt_data **crypt;
 514
 515         struct libipw_security sec = {
 516                 .flags = 0,
 517         };
 518
 519         idx = encoding->flags & IW_ENCODE_INDEX;
 520         if (idx) {
 521                 if (idx < 1 || idx > WEP_KEYS)
 522                         return -EINVAL;
 523                 idx--;
 524         } else
 525                 idx = ieee->crypt_info.tx_keyidx;
 526
 527         if (ext->ext_flags & IW_ENCODE_EXT_GROUP_KEY) {
 528                 crypt = &ieee->crypt_info.crypt[idx];
 529                 group_key = 1;
 530         } else {
 531                 /* some Cisco APs use idx>0 for unicast in dynamic WEP */
 532                 if (idx != 0 && ext->alg != IW_ENCODE_ALG_WEP)
 533                         return -EINVAL;
 534                 if (ieee->iw_mode == IW_MODE_INFRA)
 535                         crypt = &ieee->crypt_info.crypt[idx];
 536                 else
 537                         return -EINVAL;
 538         }
 539
 540         sec.flags |= SEC_ENABLED | SEC_ENCRYPT;
 541         if ((encoding->flags & IW_ENCODE_DISABLED) ||
 542             ext->alg == IW_ENCODE_ALG_NONE) {
 543                 if (*crypt)
 544                         lib80211_crypt_delayed_deinit(&ieee->crypt_info, crypt);
 545
 546                 for (i = 0; i < WEP_KEYS; i++)
 547                         if (ieee->crypt_info.crypt[i] != NULL)
 548                                 break;
 549
 550                 if (i == WEP_KEYS) {
 551                         sec.enabled = 0;
 552                         sec.encrypt = 0;
 553                         sec.level = SEC_LEVEL_0;
 554                         sec.flags |= SEC_LEVEL;
 555                 }
 556                 goto done;
 557         }
 558
 559         sec.enabled = 1;
 560         sec.encrypt = 1;
 561
 562         if (group_key ? !ieee->host_mc_decrypt :
 563             !(ieee->host_encrypt || ieee->host_decrypt ||
 564               ieee->host_encrypt_msdu))
 565                 goto skip_host_crypt;
 566
 567         switch (ext->alg) {
 568         case IW_ENCODE_ALG_WEP:
 569                 alg = "WEP";
 570                 module = "lib80211_crypt_wep";
 571                 break;
 572         case IW_ENCODE_ALG_TKIP:
 573                 alg = "TKIP";
 574                 module = "lib80211_crypt_tkip";
 575                 break;
 576         case IW_ENCODE_ALG_CCMP:
 577                 alg = "CCMP";
 578                 module = "lib80211_crypt_ccmp";
 579                 break;
 580         default:
 581                 LIBIPW_DEBUG_WX("%s: unknown crypto alg %d\n",
 582                                    dev->name, ext->alg);
 583                 ret = -EINVAL;
 584                 goto done;
 585         }
 586
 587         ops = lib80211_get_crypto_ops(alg);
 588         if (ops == NULL) {
 589                 request_module(module);
 590                 ops = lib80211_get_crypto_ops(alg);
 591         }
 592         if (ops == NULL) {
 593                 LIBIPW_DEBUG_WX("%s: unknown crypto alg %d\n",
 594                                    dev->name, ext->alg);
 595                 ret = -EINVAL;
 596                 goto done;
 597         }
 598
 599         if (*crypt == NULL || (*crypt)->ops != ops) {
 600                 struct lib80211_crypt_data *new_crypt;
 601
 602                 lib80211_crypt_delayed_deinit(&ieee->crypt_info, crypt);
 603
 604                 new_crypt = kzalloc(sizeof(*new_crypt), GFP_KERNEL);
 605                 if (new_crypt == NULL) {
 606                         ret = -ENOMEM;
 607                         goto done;
 608                 }
 609                 new_crypt->ops = ops;
 610                 if (new_crypt->ops && try_module_get(new_crypt->ops->owner))
 611                         new_crypt->priv = new_crypt->ops->init(idx);
 612                 if (new_crypt->priv == NULL) {
 613                         kfree(new_crypt);
 614                         ret = -EINVAL;
 615                         goto done;
 616                 }
 617                 *crypt = new_crypt;
 618         }
 619
 620         if (ext->key_len > 0 && (*crypt)->ops->set_key &&
 621             (*crypt)->ops->set_key(ext->key, ext->key_len, ext->rx_seq,
 622                                    (*crypt)->priv) < 0) {
 623                 LIBIPW_DEBUG_WX("%s: key setting failed\n", dev->name);
 624                 ret = -EINVAL;
 625                 goto done;
 626         }
 627
 628       skip_host_crypt:
 629         if (ext->ext_flags & IW_ENCODE_EXT_SET_TX_KEY) {
 630                 ieee->crypt_info.tx_keyidx = idx;
 631                 sec.active_key = idx;
 632                 sec.flags |= SEC_ACTIVE_KEY;
 633         }
 634
 635         if (ext->alg != IW_ENCODE_ALG_NONE) {
 636                 memcpy(sec.keys[idx], ext->key, ext->key_len);
 637                 sec.key_sizes[idx] = ext->key_len;
 638                 sec.flags |= (1 << idx);
 639                 if (ext->alg == IW_ENCODE_ALG_WEP) {
 640                         sec.encode_alg[idx] = SEC_ALG_WEP;
 641                         sec.flags |= SEC_LEVEL;
 642                         sec.level = SEC_LEVEL_1;
 643                 } else if (ext->alg == IW_ENCODE_ALG_TKIP) {
 644                         sec.encode_alg[idx] = SEC_ALG_TKIP;
 645                         sec.flags |= SEC_LEVEL;
 646                         sec.level = SEC_LEVEL_2;
 647                 } else if (ext->alg == IW_ENCODE_ALG_CCMP) {
 648                         sec.encode_alg[idx] = SEC_ALG_CCMP;
 649                         sec.flags |= SEC_LEVEL;
 650                         sec.level = SEC_LEVEL_3;
 651                 }
 652                 /* Don't set sec level for group keys. */
 653                 if (group_key)
 654                         sec.flags &= ~SEC_LEVEL;
 655         }
 656       done:
 657         if (ieee->set_security)
 658                 ieee->set_security(dev, &sec);
 659
 660         return ret;
 661 }
 662
 663 int libipw_wx_get_encodeext(struct libipw_device *ieee,
 664                                struct iw_request_info *info,
 665                                union iwreq_data *wrqu, char *extra)
 666 {
 667         struct iw_point *encoding = &wrqu->encoding;
 668         struct iw_encode_ext *ext = (struct iw_encode_ext *)extra;
 669         struct libipw_security *sec = &ieee->sec;
 670         int idx, max_key_len;
 671
 672         max_key_len = encoding->length - sizeof(*ext);
 673         if (max_key_len < 0)
 674                 return -EINVAL;
 675
 676         idx = encoding->flags & IW_ENCODE_INDEX;
 677         if (idx) {
 678                 if (idx < 1 || idx > WEP_KEYS)
 679                         return -EINVAL;
 680                 idx--;
 681         } else
 682                 idx = ieee->crypt_info.tx_keyidx;
 683
 684         if (!(ext->ext_flags & IW_ENCODE_EXT_GROUP_KEY) &&
 685             ext->alg != IW_ENCODE_ALG_WEP)
 686                 if (idx != 0 || ieee->iw_mode != IW_MODE_INFRA)
 687                         return -EINVAL;
 688
 689         encoding->flags = idx + 1;
 690         memset(ext, 0, sizeof(*ext));
 691
 692         if (!sec->enabled) {
 693                 ext->alg = IW_ENCODE_ALG_NONE;
 694                 ext->key_len = 0;
 695                 encoding->flags |= IW_ENCODE_DISABLED;
 696         } else {
 697                 if (sec->encode_alg[idx] == SEC_ALG_WEP)
 698                         ext->alg = IW_ENCODE_ALG_WEP;
 699                 else if (sec->encode_alg[idx] == SEC_ALG_TKIP)
 700                         ext->alg = IW_ENCODE_ALG_TKIP;
 701                 else if (sec->encode_alg[idx] == SEC_ALG_CCMP)
 702                         ext->alg = IW_ENCODE_ALG_CCMP;
 703                 else
 704                         return -EINVAL;
 705
 706                 ext->key_len = sec->key_sizes[idx];
 707                 memcpy(ext->key, sec->keys[idx], ext->key_len);
 708                 encoding->flags |= IW_ENCODE_ENABLED;
 709                 if (ext->key_len &&
 710                     (ext->alg == IW_ENCODE_ALG_TKIP ||
 711                      ext->alg == IW_ENCODE_ALG_CCMP))
 712                         ext->ext_flags |= IW_ENCODE_EXT_TX_SEQ_VALID;
 713
 714         }
 715
 716         return 0;
 717 }
 718
 719 EXPORT_SYMBOL(libipw_wx_set_encodeext);
 720 EXPORT_SYMBOL(libipw_wx_get_encodeext);
 721
 722 EXPORT_SYMBOL(libipw_wx_get_scan);
 723 EXPORT_SYMBOL(libipw_wx_set_encode);
 724 EXPORT_SYMBOL(libipw_wx_get_encode);