- 根目录:
- drivers
- net
- wireless
- ipw2x00
- libipw_wx.c
/******************************************************************************
Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
Portions of this file are based on the WEP enablement code provided by the
Host AP project hostap-drivers v0.1.3
Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
<j@w1.fi>
Copyright (c) 2002-2003, Jouni Malinen <j@w1.fi>
This program is free software; you can redistribute it and/or modify it
under the terms of version 2 of the GNU General Public License as
published by the Free Software Foundation.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59
Temple Place - Suite 330, Boston, MA 02111-1307, USA.
The full GNU General Public License is included in this distribution in the
file called LICENSE.
Contact Information:
Intel Linux Wireless <ilw@linux.intel.com>
Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
******************************************************************************/
#include <linux/kmod.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/jiffies.h>
#include <net/lib80211.h>
#include <linux/wireless.h>
#include "libipw.h"
static const char *libipw_modes[] = {
"?", "a", "b", "ab", "g", "ag", "bg", "abg"
};
static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
{
unsigned long end = jiffies;
if (end >= start)
return jiffies_to_msecs(end - start);
return jiffies_to_msecs(end + (MAX_JIFFY_OFFSET - start) + 1);
}
#define MAX_CUSTOM_LEN 64
static char *libipw_translate_scan(struct libipw_device *ieee,
char *start, char *stop,
struct libipw_network *network,
struct iw_request_info *info)
{
char custom[MAX_CUSTOM_LEN];
char *p;
struct iw_event iwe;
int i, j;
char *current_val; /* For rates */
u8 rate;
/* First entry *MUST* be the AP MAC address */
iwe.cmd = SIOCGIWAP;
iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
memcpy(iwe.u.ap_addr.sa_data, network->bssid, ETH_ALEN);
start = iwe_stream_add_event(info, start, stop, &iwe, IW_EV_ADDR_LEN);
/* Remaining entries will be displayed in the order we provide them */
/* Add the ESSID */
iwe.cmd = SIOCGIWESSID;
iwe.u.data.flags = 1;
iwe.u.data.length = min(network->ssid_len, (u8) 32);
start = iwe_stream_add_point(info, start, stop,
&iwe, network->ssid);
/* Add the protocol name */
iwe.cmd = SIOCGIWNAME;
snprintf(iwe.u.name, IFNAMSIZ, "IEEE 802.11%s",
libipw_modes[network->mode]);
start = iwe_stream_add_event(info, start, stop, &iwe, IW_EV_CHAR_LEN);
/* Add mode */
iwe.cmd = SIOCGIWMODE;
if (network->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
if (network->capability & WLAN_CAPABILITY_ESS)
iwe.u.mode = IW_MODE_MASTER;
else
iwe.u.mode = IW_MODE_ADHOC;
start = iwe_stream_add_event(info, start, stop,
&iwe, IW_EV_UINT_LEN);
}
/* Add channel and frequency */
/* Note : userspace automatically computes channel using iwrange */
iwe.cmd = SIOCGIWFREQ;
iwe.u.freq.m = libipw_channel_to_freq(ieee, network->channel);
iwe.u.freq.e = 6;
iwe.u.freq.i = 0;
start = iwe_stream_add_event(info, start, stop, &iwe, IW_EV_FREQ_LEN);
/* Add encryption capability */
iwe.cmd = SIOCGIWENCODE;
if (network->capability & WLAN_CAPABILITY_PRIVACY)
iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
else
iwe.u.data.flags = IW_ENCODE_DISABLED;
iwe.u.data.length = 0;
start = iwe_stream_add_point(info, start, stop,
&iwe, network->ssid);
/* Add basic and extended rates */
/* Rate : stuffing multiple values in a single event require a bit
* more of magic - Jean II */
current_val = start + iwe_stream_lcp_len(info);
iwe.cmd = SIOCGIWRATE;
/* Those two flags are ignored... */
iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
for (i = 0, j = 0; i < network->rates_len;) {
if (j < network->rates_ex_len &&
((network->rates_ex[j] & 0x7F) <
(network->rates[i] & 0x7F)))
rate = network->rates_ex[j++] & 0x7F;
else
rate = network->rates[i++] & 0x7F;
/* Bit rate given in 500 kb/s units (+ 0x80) */
iwe.u.bitrate.value = ((rate & 0x7f) * 500000);
/* Add new value to event */
current_val = iwe_stream_add_value(info, start, current_val,
stop, &iwe, IW_EV_PARAM_LEN);
}
for (; j < network->rates_ex_len; j++) {
rate = network->rates_ex[j] & 0x7F;
/* Bit rate given in 500 kb/s units (+ 0x80) */
iwe.u.bitrate.value = ((rate & 0x7f) * 500000);
/* Add new value to event */
current_val = iwe_stream_add_value(info, start, current_val,
stop, &iwe, IW_EV_PARAM_LEN);
}
/* Check if we added any rate */
if ((current_val - start) > iwe_stream_lcp_len(info))
start = current_val;
/* Add quality statistics */
iwe.cmd = IWEVQUAL;
iwe.u.qual.updated = IW_QUAL_QUAL_UPDATED | IW_QUAL_LEVEL_UPDATED |
IW_QUAL_NOISE_UPDATED;
if (!(network->stats.mask & LIBIPW_STATMASK_RSSI)) {
iwe.u.qual.updated |= IW_QUAL_QUAL_INVALID |
IW_QUAL_LEVEL_INVALID;
iwe.u.qual.qual = 0;
} else {
if (ieee->perfect_rssi == ieee->worst_rssi)
iwe.u.qual.qual = 100;
else
iwe.u.qual.qual =
(100 *
(ieee->perfect_rssi - ieee->worst_rssi) *
(ieee->perfect_rssi - ieee->worst_rssi) -
(ieee->perfect_rssi - network->stats.rssi) *
(15 * (ieee->perfect_rssi - ieee->worst_rssi) +
62 * (ieee->perfect_rssi -
network->stats.rssi))) /
((ieee->perfect_rssi -
ieee->worst_rssi) * (ieee->perfect_rssi -
ieee->worst_rssi));
if (iwe.u.qual.qual > 100)
iwe.u.qual.qual = 100;
else if (iwe.u.qual.qual < 1)
iwe.u.qual.qual = 0;
}
if (!(network->stats.mask & LIBIPW_STATMASK_NOISE)) {
iwe.u.qual.updated |= IW_QUAL_NOISE_INVALID;
iwe.u.qual.noise = 0;
} else {
iwe.u.qual.noise = network->stats.noise;
}
if (!(network->stats.mask & LIBIPW_STATMASK_SIGNAL)) {
iwe.u.qual.updated |= IW_QUAL_LEVEL_INVALID;
iwe.u.qual.level = 0;
} else {
iwe.u.qual.level = network->stats.signal;
}
start = iwe_stream_add_event(info, start, stop, &iwe, IW_EV_QUAL_LEN);
iwe.cmd = IWEVCUSTOM;
p = custom;
iwe.u.data.length = p - custom;
if (iwe.u.data.length)
start = iwe_stream_add_point(info, start, stop, &iwe, custom);
memset(&iwe, 0, sizeof(iwe));
if (network->wpa_ie_len) {
char buf[MAX_WPA_IE_LEN];
memcpy(buf, network->wpa_ie, network->wpa_ie_len);
iwe.cmd = IWEVGENIE;
iwe.u.data.length = network->wpa_ie_len;
start = iwe_stream_add_point(info, start, stop, &iwe, buf);
}
memset(&iwe, 0, sizeof(iwe));
if (network->rsn_ie_len) {
char buf[MAX_WPA_IE_LEN];
memcpy(buf, network->rsn_ie, network->rsn_ie_len);
iwe.cmd = IWEVGENIE;
iwe.u.data.length = network->rsn_ie_len;
start = iwe_stream_add_point(info, start, stop, &iwe, buf);
}
/* Add EXTRA: Age to display seconds since last beacon/probe response
* for given network. */
iwe.cmd = IWEVCUSTOM;
p = custom;
p += snprintf(p, MAX_CUSTOM_LEN - (p - custom),
" Last beacon: %ums ago",
elapsed_jiffies_msecs(network->last_scanned));
iwe.u.data.length = p - custom;
if (iwe.u.data.length)
start = iwe_stream_add_point(info, start, stop, &iwe, custom);
/* Add spectrum management information */
iwe.cmd = -1;
p = custom;
p += snprintf(p, MAX_CUSTOM_LEN - (p - custom), " Channel flags: ");
if (libipw_get_channel_flags(ieee, network->channel) &
LIBIPW_CH_INVALID) {
iwe.cmd = IWEVCUSTOM;
p += snprintf(p, MAX_CUSTOM_LEN - (p - custom), "INVALID ");
}
if (libipw_get_channel_flags(ieee, network->channel) &
LIBIPW_CH_RADAR_DETECT) {
iwe.cmd = IWEVCUSTOM;
p += snprintf(p, MAX_CUSTOM_LEN - (p - custom), "DFS ");
}
if (iwe.cmd == IWEVCUSTOM) {
iwe.u.data.length = p - custom;
start = iwe_stream_add_point(info, start, stop, &iwe, custom);
}
return start;
}
#define SCAN_ITEM_SIZE 128
int libipw_wx_get_scan(struct libipw_device *ieee,
struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
{
struct libipw_network *network;
unsigned long flags;
int err = 0;
char *ev = extra;
char *stop = ev + wrqu->data.length;
int i = 0;
DECLARE_SSID_BUF(ssid);
LIBIPW_DEBUG_WX("Getting scan\n");
spin_lock_irqsave(&ieee->lock, flags);
list_for_each_entry(network, &ieee->network_list, list) {
i++;
if (stop - ev < SCAN_ITEM_SIZE) {
err = -E2BIG;
break;
}
if (ieee->scan_age == 0 ||
time_after(network->last_scanned + ieee->scan_age, jiffies))
ev = libipw_translate_scan(ieee, ev, stop, network,
info);
else {
LIBIPW_DEBUG_SCAN("Not showing network '%s ("
"%pM)' due to age (%ums).\n",
print_ssid(ssid, network->ssid,
network->ssid_len),
network->bssid,
elapsed_jiffies_msecs(
network->last_scanned));
}
}
spin_unlock_irqrestore(&ieee->lock, flags);
wrqu->data.length = ev - extra;
wrqu->data.flags = 0;
LIBIPW_DEBUG_WX("exit: %d networks returned.\n", i);
return err;
}
int libipw_wx_set_encode(struct libipw_device *ieee,
struct iw_request_info *info,
union iwreq_data *wrqu, char *keybuf)
{
struct iw_point *erq = &(wrqu->encoding);
struct net_device *dev = ieee->dev;
struct libipw_security sec = {
.flags = 0
};
int i, key, key_provided, len;
struct lib80211_crypt_data **crypt;
int host_crypto = ieee->host_encrypt || ieee->host_decrypt;
DECLARE_SSID_BUF(ssid);
LIBIPW_DEBUG_WX("SET_ENCODE\n");
key = erq->flags & IW_ENCODE_INDEX;
if (key) {
if (key > WEP_KEYS)
return -EINVAL;
key--;
key_provided = 1;
} else {
key_provided = 0;
key = ieee->crypt_info.tx_keyidx;
}
LIBIPW_DEBUG_WX("Key: %d [%s]\n", key, key_provided ?
"provided" : "default");
crypt = &ieee->crypt_info.crypt[key];
if (erq->flags & IW_ENCODE_DISABLED) {
if (key_provided && *crypt) {
LIBIPW_DEBUG_WX("Disabling encryption on key %d.\n",
key);
lib80211_crypt_delayed_deinit(&ieee->crypt_info, crypt);
} else
LIBIPW_DEBUG_WX("Disabling encryption.\n");
/* Check all the keys to see if any are still configured,
* and if no key index was provided, de-init them all */
for (i = 0; i < WEP_KEYS; i++) {
if (ieee->crypt_info.crypt[i] != NULL) {
if (key_provided)
break;
lib80211_crypt_delayed_deinit(&ieee->crypt_info,
&ieee->crypt_info.crypt[i]);
}
}
if (i == WEP_KEYS) {
sec.enabled = 0;
sec.encrypt = 0;
sec.level = SEC_LEVEL_0;
sec.flags |= SEC_ENABLED | SEC_LEVEL | SEC_ENCRYPT;
}
goto done;
}
sec.enabled = 1;
sec.encrypt = 1;
sec.flags |= SEC_ENABLED | SEC_ENCRYPT;
if (*crypt != NULL && (*crypt)->ops != NULL &&
strcmp((*crypt)->ops->name, "WEP") != 0) {
/* changing to use WEP; deinit previously used algorithm
* on this key */
lib80211_crypt_delayed_deinit(&ieee->crypt_info, crypt);
}
if (*crypt == NULL && host_crypto) {
struct lib80211_crypt_data *new_crypt;
/* take WEP into use */
new_crypt = kzalloc(sizeof(struct lib80211_crypt_data),
GFP_KERNEL);
if (new_crypt == NULL)
return -ENOMEM;
new_crypt->ops = lib80211_get_crypto_ops("WEP");
if (!new_crypt->ops) {
request_module("lib80211_crypt_wep");
new_crypt->ops = lib80211_get_crypto_ops("WEP");
}
if (new_crypt->ops && try_module_get(new_crypt->ops->owner))
new_crypt->priv = new_crypt->ops->init(key);
if (!new_crypt->ops || !new_crypt->priv) {
kfree(new_crypt);
new_crypt = NULL;
printk(KERN_WARNING "%s: could not initialize WEP: "
"load module lib80211_crypt_wep\n", dev->name);
return -EOPNOTSUPP;
}
*crypt = new_crypt;
}
/* If a new key was provided, set it up */
if (erq->length > 0) {
len = erq->length <= 5 ? 5 : 13;
memcpy(sec.keys[key], keybuf, erq->length);
if (len > erq->length)
memset(sec.keys[key] + erq->length, 0,
len - erq->length);
LIBIPW_DEBUG_WX("Setting key %d to '%s' (%d:%d bytes)\n",
key, print_ssid(ssid, sec.keys[key], len),
erq->length, len);
sec.key_sizes[key] = len;
if (*crypt)
(*crypt)->ops->set_key(sec.keys[key], len, NULL,
(*crypt)->priv);
sec.flags |= (1 << key);
/* This ensures a key will be activated if no key is
* explicitly set */
if (key == sec.active_key)
sec.flags |= SEC_ACTIVE_KEY;
} else {
if (host_crypto) {
len = (*crypt)->ops->get_key(sec.keys[key], WEP_KEY_LEN,
NULL, (*crypt)->priv);
if (len == 0) {
/* Set a default key of all 0 */
LIBIPW_DEBUG_WX("Setting key %d to all "
"zero.\n", key);
memset(sec.keys[key], 0, 13);
(*crypt)->ops->set_key(sec.keys[key], 13, NULL,
(*crypt)->priv);
sec.key_sizes[key] = 13;
sec.flags |= (1 << key);
}
}
/* No key data - just set the default TX key index */
if (key_provided) {
LIBIPW_DEBUG_WX("Setting key %d to default Tx "
"key.\n", key);
ieee->crypt_info.tx_keyidx = key;
sec.active_key = key;
sec.flags |= SEC_ACTIVE_KEY;
}
}
if (erq->flags & (IW_ENCODE_OPEN | IW_ENCODE_RESTRICTED)) {
ieee->open_wep = !(erq->flags & IW_ENCODE_RESTRICTED);
sec.auth_mode = ieee->open_wep ? WLAN_AUTH_OPEN :
WLAN_AUTH_SHARED_KEY;
sec.flags |= SEC_AUTH_MODE;
LIBIPW_DEBUG_WX("Auth: %s\n",
sec.auth_mode == WLAN_AUTH_OPEN ?
"OPEN" : "SHARED KEY");
}
/* For now we just support WEP, so only set that security level...
* TODO: When WPA is added this is one place that needs to change */
sec.flags |= SEC_LEVEL;
sec.level = SEC_LEVEL_1; /* 40 and 104 bit WEP */
sec.encode_alg[key] = SEC_ALG_WEP;
done:
if (ieee->set_security)
ieee->set_security(dev, &sec);
/* Do not reset port if card is in Managed mode since resetting will
* generate new IEEE 802.11 authentication which may end up in looping
* with IEEE 802.1X. If your hardware requires a reset after WEP
* configuration (for example... Prism2), implement the reset_port in
* the callbacks structures used to initialize the 802.11 stack. */
if (ieee->reset_on_keychange &&
ieee->iw_mode != IW_MODE_INFRA &&
ieee->reset_port && ieee->reset_port(dev)) {
printk(KERN_DEBUG "%s: reset_port failed\n", dev->name);
return -EINVAL;
}
return 0;
}
int libipw_wx_get_encode(struct libipw_device *ieee,
struct iw_request_info *info,
union iwreq_data *wrqu, char *keybuf)
{
struct iw_point *erq = &(wrqu->encoding);
int len, key;
struct lib80211_crypt_data *crypt;
struct libipw_security *sec = &ieee->sec;
LIBIPW_DEBUG_WX("GET_ENCODE\n");
key = erq->flags & IW_ENCODE_INDEX;
if (key) {
if (key > WEP_KEYS)
return -EINVAL;
key--;
} else
key = ieee->crypt_info.tx_keyidx;
crypt = ieee->crypt_info.crypt[key];
erq->flags = key + 1;
if (!sec->enabled) {
erq->length = 0;
erq->flags |= IW_ENCODE_DISABLED;
return 0;
}
len = sec->key_sizes[key];
memcpy(keybuf, sec->keys[key], len);
erq->length = len;
erq->flags |= IW_ENCODE_ENABLED;
if (ieee->open_wep)
erq->flags |= IW_ENCODE_OPEN;
else
erq->flags |= IW_ENCODE_RESTRICTED;
return 0;
}
int libipw_wx_set_encodeext(struct libipw_device *ieee,
struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
{
struct net_device *dev = ieee->dev;
struct iw_point *encoding = &wrqu->encoding;
struct iw_encode_ext *ext = (struct iw_encode_ext *)extra;
int i, idx, ret = 0;
int group_key = 0;
const char *alg, *module;
struct lib80211_crypto_ops *ops;
struct lib80211_crypt_data **crypt;
struct libipw_security sec = {
.flags = 0,
};
idx = encoding->flags & IW_ENCODE_INDEX;
if (idx) {
if (idx < 1 || idx > WEP_KEYS)
return -EINVAL;
idx--;
} else
idx = ieee->crypt_info.tx_keyidx;
if (ext->ext_flags & IW_ENCODE_EXT_GROUP_KEY) {
crypt = &ieee->crypt_info.crypt[idx];
group_key = 1;
} else {
/* some Cisco APs use idx>0 for unicast in dynamic WEP */
if (idx != 0 && ext->alg != IW_ENCODE_ALG_WEP)
return -EINVAL;
if (ieee->iw_mode == IW_MODE_INFRA)
crypt = &ieee->crypt_info.crypt[idx];
else
return -EINVAL;
}
sec.flags |= SEC_ENABLED | SEC_ENCRYPT;
if ((encoding->flags & IW_ENCODE_DISABLED) ||
ext->alg == IW_ENCODE_ALG_NONE) {
if (*crypt)
lib80211_crypt_delayed_deinit(&ieee->crypt_info, crypt);
for (i = 0; i < WEP_KEYS; i++)
if (ieee->crypt_info.crypt[i] != NULL)
break;
if (i == WEP_KEYS) {
sec.enabled = 0;
sec.encrypt = 0;
sec.level = SEC_LEVEL_0;
sec.flags |= SEC_LEVEL;
}
goto done;
}
sec.enabled = 1;
sec.encrypt = 1;
if (group_key ? !ieee->host_mc_decrypt :
!(ieee->host_encrypt || ieee->host_decrypt ||
ieee->host_encrypt_msdu))
goto skip_host_crypt;
switch (ext->alg) {
case IW_ENCODE_ALG_WEP:
alg = "WEP";
module = "lib80211_crypt_wep";
break;
case IW_ENCODE_ALG_TKIP:
alg = "TKIP";
module = "lib80211_crypt_tkip";
break;
case IW_ENCODE_ALG_CCMP:
alg = "CCMP";
module = "lib80211_crypt_ccmp";
break;
default:
LIBIPW_DEBUG_WX("%s: unknown crypto alg %d\n",
dev->name, ext->alg);
ret = -EINVAL;
goto done;
}
ops = lib80211_get_crypto_ops(alg);
if (ops == NULL) {
request_module(module);
ops = lib80211_get_crypto_ops(alg);
}
if (ops == NULL) {
LIBIPW_DEBUG_WX("%s: unknown crypto alg %d\n",
dev->name, ext->alg);
ret = -EINVAL;
goto done;
}
if (*crypt == NULL || (*crypt)->ops != ops) {
struct lib80211_crypt_data *new_crypt;
lib80211_crypt_delayed_deinit(&ieee->crypt_info, crypt);
new_crypt = kzalloc(sizeof(*new_crypt), GFP_KERNEL);
if (new_crypt == NULL) {
ret = -ENOMEM;
goto done;
}
new_crypt->ops = ops;
if (new_crypt->ops && try_module_get(new_crypt->ops->owner))
new_crypt->priv = new_crypt->ops->init(idx);
if (new_crypt->priv == NULL) {
kfree(new_crypt);
ret = -EINVAL;
goto done;
}
*crypt = new_crypt;
}
if (ext->key_len > 0 && (*crypt)->ops->set_key &&
(*crypt)->ops->set_key(ext->key, ext->key_len, ext->rx_seq,
(*crypt)->priv) < 0) {
LIBIPW_DEBUG_WX("%s: key setting failed\n", dev->name);
ret = -EINVAL;
goto done;
}
skip_host_crypt:
if (ext->ext_flags & IW_ENCODE_EXT_SET_TX_KEY) {
ieee->crypt_info.tx_keyidx = idx;
sec.active_key = idx;
sec.flags |= SEC_ACTIVE_KEY;
}
if (ext->alg != IW_ENCODE_ALG_NONE) {
memcpy(sec.keys[idx], ext->key, ext->key_len);
sec.key_sizes[idx] = ext->key_len;
sec.flags |= (1 << idx);
if (ext->alg == IW_ENCODE_ALG_WEP) {
sec.encode_alg[idx] = SEC_ALG_WEP;
sec.flags |= SEC_LEVEL;
sec.level = SEC_LEVEL_1;
} else if (ext->alg == IW_ENCODE_ALG_TKIP) {
sec.encode_alg[idx] = SEC_ALG_TKIP;
sec.flags |= SEC_LEVEL;
sec.level = SEC_LEVEL_2;
} else if (ext->alg == IW_ENCODE_ALG_CCMP) {
sec.encode_alg[idx] = SEC_ALG_CCMP;
sec.flags |= SEC_LEVEL;
sec.level = SEC_LEVEL_3;
}
/* Don't set sec level for group keys. */
if (group_key)
sec.flags &= ~SEC_LEVEL;
}
done:
if (ieee->set_security)
ieee->set_security(ieee->dev, &sec);
/*
* Do not reset port if card is in Managed mode since resetting will
* generate new IEEE 802.11 authentication which may end up in looping
* with IEEE 802.1X. If your hardware requires a reset after WEP
* configuration (for example... Prism2), implement the reset_port in
* the callbacks structures used to initialize the 802.11 stack.
*/
if (ieee->reset_on_keychange &&
ieee->iw_mode != IW_MODE_INFRA &&
ieee->reset_port && ieee->reset_port(dev)) {
LIBIPW_DEBUG_WX("%s: reset_port failed\n", dev->name);
return -EINVAL;
}
return ret;
}
int libipw_wx_get_encodeext(struct libipw_device *ieee,
struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
{
struct iw_point *encoding = &wrqu->encoding;
struct iw_encode_ext *ext = (struct iw_encode_ext *)extra;
struct libipw_security *sec = &ieee->sec;
int idx, max_key_len;
max_key_len = encoding->length - sizeof(*ext);
if (max_key_len < 0)
return -EINVAL;
idx = encoding->flags & IW_ENCODE_INDEX;
if (idx) {
if (idx < 1 || idx > WEP_KEYS)
return -EINVAL;
idx--;
} else
idx = ieee->crypt_info.tx_keyidx;
if (!(ext->ext_flags & IW_ENCODE_EXT_GROUP_KEY) &&
ext->alg != IW_ENCODE_ALG_WEP)
if (idx != 0 || ieee->iw_mode != IW_MODE_INFRA)
return -EINVAL;
encoding->flags = idx + 1;
memset(ext, 0, sizeof(*ext));
if (!sec->enabled) {
ext->alg = IW_ENCODE_ALG_NONE;
ext->key_len = 0;
encoding->flags |= IW_ENCODE_DISABLED;
} else {
if (sec->encode_alg[idx] == SEC_ALG_WEP)
ext->alg = IW_ENCODE_ALG_WEP;
else if (sec->encode_alg[idx] == SEC_ALG_TKIP)
ext->alg = IW_ENCODE_ALG_TKIP;
else if (sec->encode_alg[idx] == SEC_ALG_CCMP)
ext->alg = IW_ENCODE_ALG_CCMP;
else
return -EINVAL;
ext->key_len = sec->key_sizes[idx];
memcpy(ext->key, sec->keys[idx], ext->key_len);
encoding->flags |= IW_ENCODE_ENABLED;
if (ext->key_len &&
(ext->alg == IW_ENCODE_ALG_TKIP ||
ext->alg == IW_ENCODE_ALG_CCMP))
ext->ext_flags |= IW_ENCODE_EXT_TX_SEQ_VALID;
}
return 0;
}
EXPORT_SYMBOL(libipw_wx_set_encodeext);
EXPORT_SYMBOL(libipw_wx_get_encodeext);
EXPORT_SYMBOL(libipw_wx_get_scan);
EXPORT_SYMBOL(libipw_wx_set_encode);
EXPORT_SYMBOL(libipw_wx_get_encode);