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