linux/drivers/net/wireless/intel/ipw2x00/libipw_wx.c
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   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
  30static const char *libipw_modes[] = {
  31        "?", "a", "b", "ab", "g", "ag", "bg", "abg"
  32};
  33
  34static 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
  45static 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 += snprintf(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 += snprintf(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 += snprintf(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 += snprintf(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
 250int 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
 296int 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
 462int 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 lib80211_crypt_data *crypt;
 469        struct libipw_security *sec = &ieee->sec;
 470
 471        LIBIPW_DEBUG_WX("GET_ENCODE\n");
 472
 473        key = erq->flags & IW_ENCODE_INDEX;
 474        if (key) {
 475                if (key > WEP_KEYS)
 476                        return -EINVAL;
 477                key--;
 478        } else
 479                key = ieee->crypt_info.tx_keyidx;
 480
 481        crypt = ieee->crypt_info.crypt[key];
 482        erq->flags = key + 1;
 483
 484        if (!sec->enabled) {
 485                erq->length = 0;
 486                erq->flags |= IW_ENCODE_DISABLED;
 487                return 0;
 488        }
 489
 490        len = sec->key_sizes[key];
 491        memcpy(keybuf, sec->keys[key], len);
 492
 493        erq->length = len;
 494        erq->flags |= IW_ENCODE_ENABLED;
 495
 496        if (ieee->open_wep)
 497                erq->flags |= IW_ENCODE_OPEN;
 498        else
 499                erq->flags |= IW_ENCODE_RESTRICTED;
 500
 501        return 0;
 502}
 503
 504int libipw_wx_set_encodeext(struct libipw_device *ieee,
 505                               struct iw_request_info *info,
 506                               union iwreq_data *wrqu, char *extra)
 507{
 508        struct net_device *dev = ieee->dev;
 509        struct iw_point *encoding = &wrqu->encoding;
 510        struct iw_encode_ext *ext = (struct iw_encode_ext *)extra;
 511        int i, idx, ret = 0;
 512        int group_key = 0;
 513        const char *alg, *module;
 514        struct lib80211_crypto_ops *ops;
 515        struct lib80211_crypt_data **crypt;
 516
 517        struct libipw_security sec = {
 518                .flags = 0,
 519        };
 520
 521        idx = encoding->flags & IW_ENCODE_INDEX;
 522        if (idx) {
 523                if (idx < 1 || idx > WEP_KEYS)
 524                        return -EINVAL;
 525                idx--;
 526        } else
 527                idx = ieee->crypt_info.tx_keyidx;
 528
 529        if (ext->ext_flags & IW_ENCODE_EXT_GROUP_KEY) {
 530                crypt = &ieee->crypt_info.crypt[idx];
 531                group_key = 1;
 532        } else {
 533                /* some Cisco APs use idx>0 for unicast in dynamic WEP */
 534                if (idx != 0 && ext->alg != IW_ENCODE_ALG_WEP)
 535                        return -EINVAL;
 536                if (ieee->iw_mode == IW_MODE_INFRA)
 537                        crypt = &ieee->crypt_info.crypt[idx];
 538                else
 539                        return -EINVAL;
 540        }
 541
 542        sec.flags |= SEC_ENABLED | SEC_ENCRYPT;
 543        if ((encoding->flags & IW_ENCODE_DISABLED) ||
 544            ext->alg == IW_ENCODE_ALG_NONE) {
 545                if (*crypt)
 546                        lib80211_crypt_delayed_deinit(&ieee->crypt_info, crypt);
 547
 548                for (i = 0; i < WEP_KEYS; i++)
 549                        if (ieee->crypt_info.crypt[i] != NULL)
 550                                break;
 551
 552                if (i == WEP_KEYS) {
 553                        sec.enabled = 0;
 554                        sec.encrypt = 0;
 555                        sec.level = SEC_LEVEL_0;
 556                        sec.flags |= SEC_LEVEL;
 557                }
 558                goto done;
 559        }
 560
 561        sec.enabled = 1;
 562        sec.encrypt = 1;
 563
 564        if (group_key ? !ieee->host_mc_decrypt :
 565            !(ieee->host_encrypt || ieee->host_decrypt ||
 566              ieee->host_encrypt_msdu))
 567                goto skip_host_crypt;
 568
 569        switch (ext->alg) {
 570        case IW_ENCODE_ALG_WEP:
 571                alg = "WEP";
 572                module = "lib80211_crypt_wep";
 573                break;
 574        case IW_ENCODE_ALG_TKIP:
 575                alg = "TKIP";
 576                module = "lib80211_crypt_tkip";
 577                break;
 578        case IW_ENCODE_ALG_CCMP:
 579                alg = "CCMP";
 580                module = "lib80211_crypt_ccmp";
 581                break;
 582        default:
 583                LIBIPW_DEBUG_WX("%s: unknown crypto alg %d\n",
 584                                   dev->name, ext->alg);
 585                ret = -EINVAL;
 586                goto done;
 587        }
 588
 589        ops = lib80211_get_crypto_ops(alg);
 590        if (ops == NULL) {
 591                request_module(module);
 592                ops = lib80211_get_crypto_ops(alg);
 593        }
 594        if (ops == NULL) {
 595                LIBIPW_DEBUG_WX("%s: unknown crypto alg %d\n",
 596                                   dev->name, ext->alg);
 597                ret = -EINVAL;
 598                goto done;
 599        }
 600
 601        if (*crypt == NULL || (*crypt)->ops != ops) {
 602                struct lib80211_crypt_data *new_crypt;
 603
 604                lib80211_crypt_delayed_deinit(&ieee->crypt_info, crypt);
 605
 606                new_crypt = kzalloc(sizeof(*new_crypt), GFP_KERNEL);
 607                if (new_crypt == NULL) {
 608                        ret = -ENOMEM;
 609                        goto done;
 610                }
 611                new_crypt->ops = ops;
 612                if (new_crypt->ops && try_module_get(new_crypt->ops->owner))
 613                        new_crypt->priv = new_crypt->ops->init(idx);
 614                if (new_crypt->priv == NULL) {
 615                        kfree(new_crypt);
 616                        ret = -EINVAL;
 617                        goto done;
 618                }
 619                *crypt = new_crypt;
 620        }
 621
 622        if (ext->key_len > 0 && (*crypt)->ops->set_key &&
 623            (*crypt)->ops->set_key(ext->key, ext->key_len, ext->rx_seq,
 624                                   (*crypt)->priv) < 0) {
 625                LIBIPW_DEBUG_WX("%s: key setting failed\n", dev->name);
 626                ret = -EINVAL;
 627                goto done;
 628        }
 629
 630      skip_host_crypt:
 631        if (ext->ext_flags & IW_ENCODE_EXT_SET_TX_KEY) {
 632                ieee->crypt_info.tx_keyidx = idx;
 633                sec.active_key = idx;
 634                sec.flags |= SEC_ACTIVE_KEY;
 635        }
 636
 637        if (ext->alg != IW_ENCODE_ALG_NONE) {
 638                memcpy(sec.keys[idx], ext->key, ext->key_len);
 639                sec.key_sizes[idx] = ext->key_len;
 640                sec.flags |= (1 << idx);
 641                if (ext->alg == IW_ENCODE_ALG_WEP) {
 642                        sec.encode_alg[idx] = SEC_ALG_WEP;
 643                        sec.flags |= SEC_LEVEL;
 644                        sec.level = SEC_LEVEL_1;
 645                } else if (ext->alg == IW_ENCODE_ALG_TKIP) {
 646                        sec.encode_alg[idx] = SEC_ALG_TKIP;
 647                        sec.flags |= SEC_LEVEL;
 648                        sec.level = SEC_LEVEL_2;
 649                } else if (ext->alg == IW_ENCODE_ALG_CCMP) {
 650                        sec.encode_alg[idx] = SEC_ALG_CCMP;
 651                        sec.flags |= SEC_LEVEL;
 652                        sec.level = SEC_LEVEL_3;
 653                }
 654                /* Don't set sec level for group keys. */
 655                if (group_key)
 656                        sec.flags &= ~SEC_LEVEL;
 657        }
 658      done:
 659        if (ieee->set_security)
 660                ieee->set_security(dev, &sec);
 661
 662        return ret;
 663}
 664
 665int libipw_wx_get_encodeext(struct libipw_device *ieee,
 666                               struct iw_request_info *info,
 667                               union iwreq_data *wrqu, char *extra)
 668{
 669        struct iw_point *encoding = &wrqu->encoding;
 670        struct iw_encode_ext *ext = (struct iw_encode_ext *)extra;
 671        struct libipw_security *sec = &ieee->sec;
 672        int idx, max_key_len;
 673
 674        max_key_len = encoding->length - sizeof(*ext);
 675        if (max_key_len < 0)
 676                return -EINVAL;
 677
 678        idx = encoding->flags & IW_ENCODE_INDEX;
 679        if (idx) {
 680                if (idx < 1 || idx > WEP_KEYS)
 681                        return -EINVAL;
 682                idx--;
 683        } else
 684                idx = ieee->crypt_info.tx_keyidx;
 685
 686        if (!(ext->ext_flags & IW_ENCODE_EXT_GROUP_KEY) &&
 687            ext->alg != IW_ENCODE_ALG_WEP)
 688                if (idx != 0 || ieee->iw_mode != IW_MODE_INFRA)
 689                        return -EINVAL;
 690
 691        encoding->flags = idx + 1;
 692        memset(ext, 0, sizeof(*ext));
 693
 694        if (!sec->enabled) {
 695                ext->alg = IW_ENCODE_ALG_NONE;
 696                ext->key_len = 0;
 697                encoding->flags |= IW_ENCODE_DISABLED;
 698        } else {
 699                if (sec->encode_alg[idx] == SEC_ALG_WEP)
 700                        ext->alg = IW_ENCODE_ALG_WEP;
 701                else if (sec->encode_alg[idx] == SEC_ALG_TKIP)
 702                        ext->alg = IW_ENCODE_ALG_TKIP;
 703                else if (sec->encode_alg[idx] == SEC_ALG_CCMP)
 704                        ext->alg = IW_ENCODE_ALG_CCMP;
 705                else
 706                        return -EINVAL;
 707
 708                ext->key_len = sec->key_sizes[idx];
 709                memcpy(ext->key, sec->keys[idx], ext->key_len);
 710                encoding->flags |= IW_ENCODE_ENABLED;
 711                if (ext->key_len &&
 712                    (ext->alg == IW_ENCODE_ALG_TKIP ||
 713                     ext->alg == IW_ENCODE_ALG_CCMP))
 714                        ext->ext_flags |= IW_ENCODE_EXT_TX_SEQ_VALID;
 715
 716        }
 717
 718        return 0;
 719}
 720
 721EXPORT_SYMBOL(libipw_wx_set_encodeext);
 722EXPORT_SYMBOL(libipw_wx_get_encodeext);
 723
 724EXPORT_SYMBOL(libipw_wx_get_scan);
 725EXPORT_SYMBOL(libipw_wx_set_encode);
 726EXPORT_SYMBOL(libipw_wx_get_encode);
 727