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wext-compat.c
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wext-compat.c
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// SPDX-License-Identifier: GPL-2.0
/*
* cfg80211 - wext compat code
*
* This is temporary code until all wireless functionality is migrated
* into cfg80211, when that happens all the exports here go away and
* we directly assign the wireless handlers of wireless interfaces.
*
* Copyright 2008-2009 Johannes Berg <[email protected]>
* Copyright (C) 2019-2023 Intel Corporation
*/
#include <linux/export.h>
#include <linux/wireless.h>
#include <linux/nl80211.h>
#include <linux/if_arp.h>
#include <linux/etherdevice.h>
#include <linux/slab.h>
#include <net/iw_handler.h>
#include <net/cfg80211.h>
#include <net/cfg80211-wext.h>
#include "wext-compat.h"
#include "core.h"
#include "rdev-ops.h"
int cfg80211_wext_giwname(struct net_device *dev,
struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
{
strcpy(wrqu->name, "IEEE 802.11");
return 0;
}
EXPORT_WEXT_HANDLER(cfg80211_wext_giwname);
int cfg80211_wext_siwmode(struct net_device *dev, struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
{
__u32 *mode = &wrqu->mode;
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev;
struct vif_params vifparams;
enum nl80211_iftype type;
int ret;
rdev = wiphy_to_rdev(wdev->wiphy);
switch (*mode) {
case IW_MODE_INFRA:
type = NL80211_IFTYPE_STATION;
break;
case IW_MODE_ADHOC:
type = NL80211_IFTYPE_ADHOC;
break;
case IW_MODE_MONITOR:
type = NL80211_IFTYPE_MONITOR;
break;
default:
return -EINVAL;
}
if (type == wdev->iftype)
return 0;
memset(&vifparams, 0, sizeof(vifparams));
wiphy_lock(wdev->wiphy);
ret = cfg80211_change_iface(rdev, dev, type, &vifparams);
wiphy_unlock(wdev->wiphy);
return ret;
}
EXPORT_WEXT_HANDLER(cfg80211_wext_siwmode);
int cfg80211_wext_giwmode(struct net_device *dev, struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
{
__u32 *mode = &wrqu->mode;
struct wireless_dev *wdev = dev->ieee80211_ptr;
if (!wdev)
return -EOPNOTSUPP;
switch (wdev->iftype) {
case NL80211_IFTYPE_AP:
*mode = IW_MODE_MASTER;
break;
case NL80211_IFTYPE_STATION:
*mode = IW_MODE_INFRA;
break;
case NL80211_IFTYPE_ADHOC:
*mode = IW_MODE_ADHOC;
break;
case NL80211_IFTYPE_MONITOR:
*mode = IW_MODE_MONITOR;
break;
case NL80211_IFTYPE_WDS:
*mode = IW_MODE_REPEAT;
break;
case NL80211_IFTYPE_AP_VLAN:
*mode = IW_MODE_SECOND; /* FIXME */
break;
default:
*mode = IW_MODE_AUTO;
break;
}
return 0;
}
EXPORT_WEXT_HANDLER(cfg80211_wext_giwmode);
int cfg80211_wext_giwrange(struct net_device *dev,
struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
{
struct iw_point *data = &wrqu->data;
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct iw_range *range = (struct iw_range *) extra;
enum nl80211_band band;
int i, c = 0;
if (!wdev)
return -EOPNOTSUPP;
data->length = sizeof(struct iw_range);
memset(range, 0, sizeof(struct iw_range));
range->we_version_compiled = WIRELESS_EXT;
range->we_version_source = 21;
range->retry_capa = IW_RETRY_LIMIT;
range->retry_flags = IW_RETRY_LIMIT;
range->min_retry = 0;
range->max_retry = 255;
range->min_rts = 0;
range->max_rts = 2347;
range->min_frag = 256;
range->max_frag = 2346;
range->max_encoding_tokens = 4;
range->max_qual.updated = IW_QUAL_NOISE_INVALID;
switch (wdev->wiphy->signal_type) {
case CFG80211_SIGNAL_TYPE_NONE:
break;
case CFG80211_SIGNAL_TYPE_MBM:
range->max_qual.level = (u8)-110;
range->max_qual.qual = 70;
range->avg_qual.qual = 35;
range->max_qual.updated |= IW_QUAL_DBM;
range->max_qual.updated |= IW_QUAL_QUAL_UPDATED;
range->max_qual.updated |= IW_QUAL_LEVEL_UPDATED;
break;
case CFG80211_SIGNAL_TYPE_UNSPEC:
range->max_qual.level = 100;
range->max_qual.qual = 100;
range->avg_qual.qual = 50;
range->max_qual.updated |= IW_QUAL_QUAL_UPDATED;
range->max_qual.updated |= IW_QUAL_LEVEL_UPDATED;
break;
}
range->avg_qual.level = range->max_qual.level / 2;
range->avg_qual.noise = range->max_qual.noise / 2;
range->avg_qual.updated = range->max_qual.updated;
for (i = 0; i < wdev->wiphy->n_cipher_suites; i++) {
switch (wdev->wiphy->cipher_suites[i]) {
case WLAN_CIPHER_SUITE_TKIP:
range->enc_capa |= (IW_ENC_CAPA_CIPHER_TKIP |
IW_ENC_CAPA_WPA);
break;
case WLAN_CIPHER_SUITE_CCMP:
range->enc_capa |= (IW_ENC_CAPA_CIPHER_CCMP |
IW_ENC_CAPA_WPA2);
break;
case WLAN_CIPHER_SUITE_WEP40:
range->encoding_size[range->num_encoding_sizes++] =
WLAN_KEY_LEN_WEP40;
break;
case WLAN_CIPHER_SUITE_WEP104:
range->encoding_size[range->num_encoding_sizes++] =
WLAN_KEY_LEN_WEP104;
break;
}
}
for (band = 0; band < NUM_NL80211_BANDS; band ++) {
struct ieee80211_supported_band *sband;
sband = wdev->wiphy->bands[band];
if (!sband)
continue;
for (i = 0; i < sband->n_channels && c < IW_MAX_FREQUENCIES; i++) {
struct ieee80211_channel *chan = &sband->channels[i];
if (!(chan->flags & IEEE80211_CHAN_DISABLED)) {
range->freq[c].i =
ieee80211_frequency_to_channel(
chan->center_freq);
range->freq[c].m = chan->center_freq;
range->freq[c].e = 6;
c++;
}
}
}
range->num_channels = c;
range->num_frequency = c;
IW_EVENT_CAPA_SET_KERNEL(range->event_capa);
IW_EVENT_CAPA_SET(range->event_capa, SIOCGIWAP);
IW_EVENT_CAPA_SET(range->event_capa, SIOCGIWSCAN);
if (wdev->wiphy->max_scan_ssids > 0)
range->scan_capa |= IW_SCAN_CAPA_ESSID;
return 0;
}
EXPORT_WEXT_HANDLER(cfg80211_wext_giwrange);
/**
* cfg80211_wext_freq - get wext frequency for non-"auto"
* @freq: the wext freq encoding
*
* Returns: a frequency, or a negative error code, or 0 for auto.
*/
int cfg80211_wext_freq(struct iw_freq *freq)
{
/*
* Parse frequency - return 0 for auto and
* -EINVAL for impossible things.
*/
if (freq->e == 0) {
enum nl80211_band band = NL80211_BAND_2GHZ;
if (freq->m < 0)
return 0;
if (freq->m > 14)
band = NL80211_BAND_5GHZ;
return ieee80211_channel_to_frequency(freq->m, band);
} else {
int i, div = 1000000;
for (i = 0; i < freq->e; i++)
div /= 10;
if (div <= 0)
return -EINVAL;
return freq->m / div;
}
}
int cfg80211_wext_siwrts(struct net_device *dev,
struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
{
struct iw_param *rts = &wrqu->rts;
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
u32 orts = wdev->wiphy->rts_threshold;
int err;
wiphy_lock(&rdev->wiphy);
if (rts->disabled || !rts->fixed) {
wdev->wiphy->rts_threshold = (u32) -1;
} else if (rts->value < 0) {
err = -EINVAL;
goto out;
} else {
wdev->wiphy->rts_threshold = rts->value;
}
err = rdev_set_wiphy_params(rdev, WIPHY_PARAM_RTS_THRESHOLD);
if (err)
wdev->wiphy->rts_threshold = orts;
out:
wiphy_unlock(&rdev->wiphy);
return err;
}
EXPORT_WEXT_HANDLER(cfg80211_wext_siwrts);
int cfg80211_wext_giwrts(struct net_device *dev,
struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
{
struct iw_param *rts = &wrqu->rts;
struct wireless_dev *wdev = dev->ieee80211_ptr;
rts->value = wdev->wiphy->rts_threshold;
rts->disabled = rts->value == (u32) -1;
rts->fixed = 1;
return 0;
}
EXPORT_WEXT_HANDLER(cfg80211_wext_giwrts);
int cfg80211_wext_siwfrag(struct net_device *dev,
struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
{
struct iw_param *frag = &wrqu->frag;
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
u32 ofrag = wdev->wiphy->frag_threshold;
int err;
wiphy_lock(&rdev->wiphy);
if (frag->disabled || !frag->fixed) {
wdev->wiphy->frag_threshold = (u32) -1;
} else if (frag->value < 256) {
err = -EINVAL;
goto out;
} else {
/* Fragment length must be even, so strip LSB. */
wdev->wiphy->frag_threshold = frag->value & ~0x1;
}
err = rdev_set_wiphy_params(rdev, WIPHY_PARAM_FRAG_THRESHOLD);
if (err)
wdev->wiphy->frag_threshold = ofrag;
out:
wiphy_unlock(&rdev->wiphy);
return err;
}
EXPORT_WEXT_HANDLER(cfg80211_wext_siwfrag);
int cfg80211_wext_giwfrag(struct net_device *dev,
struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
{
struct iw_param *frag = &wrqu->frag;
struct wireless_dev *wdev = dev->ieee80211_ptr;
frag->value = wdev->wiphy->frag_threshold;
frag->disabled = frag->value == (u32) -1;
frag->fixed = 1;
return 0;
}
EXPORT_WEXT_HANDLER(cfg80211_wext_giwfrag);
static int cfg80211_wext_siwretry(struct net_device *dev,
struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
{
struct iw_param *retry = &wrqu->retry;
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
u32 changed = 0;
u8 olong = wdev->wiphy->retry_long;
u8 oshort = wdev->wiphy->retry_short;
int err;
if (retry->disabled || retry->value < 1 || retry->value > 255 ||
(retry->flags & IW_RETRY_TYPE) != IW_RETRY_LIMIT)
return -EINVAL;
wiphy_lock(&rdev->wiphy);
if (retry->flags & IW_RETRY_LONG) {
wdev->wiphy->retry_long = retry->value;
changed |= WIPHY_PARAM_RETRY_LONG;
} else if (retry->flags & IW_RETRY_SHORT) {
wdev->wiphy->retry_short = retry->value;
changed |= WIPHY_PARAM_RETRY_SHORT;
} else {
wdev->wiphy->retry_short = retry->value;
wdev->wiphy->retry_long = retry->value;
changed |= WIPHY_PARAM_RETRY_LONG;
changed |= WIPHY_PARAM_RETRY_SHORT;
}
err = rdev_set_wiphy_params(rdev, changed);
if (err) {
wdev->wiphy->retry_short = oshort;
wdev->wiphy->retry_long = olong;
}
wiphy_unlock(&rdev->wiphy);
return err;
}
int cfg80211_wext_giwretry(struct net_device *dev,
struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
{
struct iw_param *retry = &wrqu->retry;
struct wireless_dev *wdev = dev->ieee80211_ptr;
retry->disabled = 0;
if (retry->flags == 0 || (retry->flags & IW_RETRY_SHORT)) {
/*
* First return short value, iwconfig will ask long value
* later if needed
*/
retry->flags |= IW_RETRY_LIMIT | IW_RETRY_SHORT;
retry->value = wdev->wiphy->retry_short;
if (wdev->wiphy->retry_long == wdev->wiphy->retry_short)
retry->flags |= IW_RETRY_LONG;
return 0;
}
if (retry->flags & IW_RETRY_LONG) {
retry->flags = IW_RETRY_LIMIT | IW_RETRY_LONG;
retry->value = wdev->wiphy->retry_long;
}
return 0;
}
EXPORT_WEXT_HANDLER(cfg80211_wext_giwretry);
static int cfg80211_set_encryption(struct cfg80211_registered_device *rdev,
struct net_device *dev, bool pairwise,
const u8 *addr, bool remove, bool tx_key,
int idx, struct key_params *params)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
int err, i;
bool rejoin = false;
if (wdev->valid_links)
return -EINVAL;
if (pairwise && !addr)
return -EINVAL;
/*
* In many cases we won't actually need this, but it's better
* to do it first in case the allocation fails. Don't use wext.
*/
if (!wdev->wext.keys) {
wdev->wext.keys = kzalloc(sizeof(*wdev->wext.keys),
GFP_KERNEL);
if (!wdev->wext.keys)
return -ENOMEM;
for (i = 0; i < 4; i++)
wdev->wext.keys->params[i].key =
wdev->wext.keys->data[i];
}
if (wdev->iftype != NL80211_IFTYPE_ADHOC &&
wdev->iftype != NL80211_IFTYPE_STATION)
return -EOPNOTSUPP;
if (params->cipher == WLAN_CIPHER_SUITE_AES_CMAC) {
if (!wdev->connected)
return -ENOLINK;
if (!rdev->ops->set_default_mgmt_key)
return -EOPNOTSUPP;
if (idx < 4 || idx > 5)
return -EINVAL;
} else if (idx < 0 || idx > 3)
return -EINVAL;
if (remove) {
err = 0;
if (wdev->connected ||
(wdev->iftype == NL80211_IFTYPE_ADHOC &&
wdev->u.ibss.current_bss)) {
/*
* If removing the current TX key, we will need to
* join a new IBSS without the privacy bit clear.
*/
if (idx == wdev->wext.default_key &&
wdev->iftype == NL80211_IFTYPE_ADHOC) {
cfg80211_leave_ibss(rdev, wdev->netdev, true);
rejoin = true;
}
if (!pairwise && addr &&
!(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
err = -ENOENT;
else
err = rdev_del_key(rdev, dev, -1, idx, pairwise,
addr);
}
wdev->wext.connect.privacy = false;
/*
* Applications using wireless extensions expect to be
* able to delete keys that don't exist, so allow that.
*/
if (err == -ENOENT)
err = 0;
if (!err) {
if (!addr && idx < 4) {
memset(wdev->wext.keys->data[idx], 0,
sizeof(wdev->wext.keys->data[idx]));
wdev->wext.keys->params[idx].key_len = 0;
wdev->wext.keys->params[idx].cipher = 0;
}
if (idx == wdev->wext.default_key)
wdev->wext.default_key = -1;
else if (idx == wdev->wext.default_mgmt_key)
wdev->wext.default_mgmt_key = -1;
}
if (!err && rejoin)
err = cfg80211_ibss_wext_join(rdev, wdev);
return err;
}
if (addr)
tx_key = false;
if (cfg80211_validate_key_settings(rdev, params, idx, pairwise, addr))
return -EINVAL;
err = 0;
if (wdev->connected ||
(wdev->iftype == NL80211_IFTYPE_ADHOC &&
wdev->u.ibss.current_bss))
err = rdev_add_key(rdev, dev, -1, idx, pairwise, addr, params);
else if (params->cipher != WLAN_CIPHER_SUITE_WEP40 &&
params->cipher != WLAN_CIPHER_SUITE_WEP104)
return -EINVAL;
if (err)
return err;
/*
* We only need to store WEP keys, since they're the only keys that
* can be set before a connection is established and persist after
* disconnecting.
*/
if (!addr && (params->cipher == WLAN_CIPHER_SUITE_WEP40 ||
params->cipher == WLAN_CIPHER_SUITE_WEP104)) {
wdev->wext.keys->params[idx] = *params;
memcpy(wdev->wext.keys->data[idx],
params->key, params->key_len);
wdev->wext.keys->params[idx].key =
wdev->wext.keys->data[idx];
}
if ((params->cipher == WLAN_CIPHER_SUITE_WEP40 ||
params->cipher == WLAN_CIPHER_SUITE_WEP104) &&
(tx_key || (!addr && wdev->wext.default_key == -1))) {
if (wdev->connected ||
(wdev->iftype == NL80211_IFTYPE_ADHOC &&
wdev->u.ibss.current_bss)) {
/*
* If we are getting a new TX key from not having
* had one before we need to join a new IBSS with
* the privacy bit set.
*/
if (wdev->iftype == NL80211_IFTYPE_ADHOC &&
wdev->wext.default_key == -1) {
cfg80211_leave_ibss(rdev, wdev->netdev, true);
rejoin = true;
}
err = rdev_set_default_key(rdev, dev, -1, idx, true,
true);
}
if (!err) {
wdev->wext.default_key = idx;
if (rejoin)
err = cfg80211_ibss_wext_join(rdev, wdev);
}
return err;
}
if (params->cipher == WLAN_CIPHER_SUITE_AES_CMAC &&
(tx_key || (!addr && wdev->wext.default_mgmt_key == -1))) {
if (wdev->connected ||
(wdev->iftype == NL80211_IFTYPE_ADHOC &&
wdev->u.ibss.current_bss))
err = rdev_set_default_mgmt_key(rdev, dev, -1, idx);
if (!err)
wdev->wext.default_mgmt_key = idx;
return err;
}
return 0;
}
static int cfg80211_wext_siwencode(struct net_device *dev,
struct iw_request_info *info,
union iwreq_data *wrqu, char *keybuf)
{
struct iw_point *erq = &wrqu->encoding;
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
int idx, err;
bool remove = false;
struct key_params params;
if (wdev->iftype != NL80211_IFTYPE_STATION &&
wdev->iftype != NL80211_IFTYPE_ADHOC)
return -EOPNOTSUPP;
/* no use -- only MFP (set_default_mgmt_key) is optional */
if (!rdev->ops->del_key ||
!rdev->ops->add_key ||
!rdev->ops->set_default_key)
return -EOPNOTSUPP;
wiphy_lock(&rdev->wiphy);
if (wdev->valid_links) {
err = -EOPNOTSUPP;
goto out;
}
idx = erq->flags & IW_ENCODE_INDEX;
if (idx == 0) {
idx = wdev->wext.default_key;
if (idx < 0)
idx = 0;
} else if (idx < 1 || idx > 4) {
err = -EINVAL;
goto out;
} else {
idx--;
}
if (erq->flags & IW_ENCODE_DISABLED)
remove = true;
else if (erq->length == 0) {
/* No key data - just set the default TX key index */
err = 0;
if (wdev->connected ||
(wdev->iftype == NL80211_IFTYPE_ADHOC &&
wdev->u.ibss.current_bss))
err = rdev_set_default_key(rdev, dev, -1, idx, true,
true);
if (!err)
wdev->wext.default_key = idx;
goto out;
}
memset(¶ms, 0, sizeof(params));
params.key = keybuf;
params.key_len = erq->length;
if (erq->length == 5) {
params.cipher = WLAN_CIPHER_SUITE_WEP40;
} else if (erq->length == 13) {
params.cipher = WLAN_CIPHER_SUITE_WEP104;
} else if (!remove) {
err = -EINVAL;
goto out;
}
err = cfg80211_set_encryption(rdev, dev, false, NULL, remove,
wdev->wext.default_key == -1,
idx, ¶ms);
out:
wiphy_unlock(&rdev->wiphy);
return err;
}
static int cfg80211_wext_siwencodeext(struct net_device *dev,
struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
{
struct iw_point *erq = &wrqu->encoding;
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
struct iw_encode_ext *ext = (struct iw_encode_ext *) extra;
const u8 *addr;
int idx;
bool remove = false;
struct key_params params;
u32 cipher;
int ret;
if (wdev->iftype != NL80211_IFTYPE_STATION &&
wdev->iftype != NL80211_IFTYPE_ADHOC)
return -EOPNOTSUPP;
/* no use -- only MFP (set_default_mgmt_key) is optional */
if (!rdev->ops->del_key ||
!rdev->ops->add_key ||
!rdev->ops->set_default_key)
return -EOPNOTSUPP;
if (wdev->valid_links)
return -EOPNOTSUPP;
switch (ext->alg) {
case IW_ENCODE_ALG_NONE:
remove = true;
cipher = 0;
break;
case IW_ENCODE_ALG_WEP:
if (ext->key_len == 5)
cipher = WLAN_CIPHER_SUITE_WEP40;
else if (ext->key_len == 13)
cipher = WLAN_CIPHER_SUITE_WEP104;
else
return -EINVAL;
break;
case IW_ENCODE_ALG_TKIP:
cipher = WLAN_CIPHER_SUITE_TKIP;
break;
case IW_ENCODE_ALG_CCMP:
cipher = WLAN_CIPHER_SUITE_CCMP;
break;
case IW_ENCODE_ALG_AES_CMAC:
cipher = WLAN_CIPHER_SUITE_AES_CMAC;
break;
default:
return -EOPNOTSUPP;
}
if (erq->flags & IW_ENCODE_DISABLED)
remove = true;
idx = erq->flags & IW_ENCODE_INDEX;
if (cipher == WLAN_CIPHER_SUITE_AES_CMAC) {
if (idx < 4 || idx > 5) {
idx = wdev->wext.default_mgmt_key;
if (idx < 0)
return -EINVAL;
} else
idx--;
} else {
if (idx < 1 || idx > 4) {
idx = wdev->wext.default_key;
if (idx < 0)
return -EINVAL;
} else
idx--;
}
addr = ext->addr.sa_data;
if (is_broadcast_ether_addr(addr))
addr = NULL;
memset(¶ms, 0, sizeof(params));
params.key = ext->key;
params.key_len = ext->key_len;
params.cipher = cipher;
if (ext->ext_flags & IW_ENCODE_EXT_RX_SEQ_VALID) {
params.seq = ext->rx_seq;
params.seq_len = 6;
}
wiphy_lock(wdev->wiphy);
ret = cfg80211_set_encryption(
rdev, dev,
!(ext->ext_flags & IW_ENCODE_EXT_GROUP_KEY),
addr, remove,
ext->ext_flags & IW_ENCODE_EXT_SET_TX_KEY,
idx, ¶ms);
wiphy_unlock(wdev->wiphy);
return ret;
}
static int cfg80211_wext_giwencode(struct net_device *dev,
struct iw_request_info *info,
union iwreq_data *wrqu, char *keybuf)
{
struct iw_point *erq = &wrqu->encoding;
struct wireless_dev *wdev = dev->ieee80211_ptr;
int idx;
if (wdev->iftype != NL80211_IFTYPE_STATION &&
wdev->iftype != NL80211_IFTYPE_ADHOC)
return -EOPNOTSUPP;
idx = erq->flags & IW_ENCODE_INDEX;
if (idx == 0) {
idx = wdev->wext.default_key;
if (idx < 0)
idx = 0;
} else if (idx < 1 || idx > 4)
return -EINVAL;
else
idx--;
erq->flags = idx + 1;
if (!wdev->wext.keys || !wdev->wext.keys->params[idx].cipher) {
erq->flags |= IW_ENCODE_DISABLED;
erq->length = 0;
return 0;
}
erq->length = min_t(size_t, erq->length,
wdev->wext.keys->params[idx].key_len);
memcpy(keybuf, wdev->wext.keys->params[idx].key, erq->length);
erq->flags |= IW_ENCODE_ENABLED;
return 0;
}
static int cfg80211_wext_siwfreq(struct net_device *dev,
struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
{
struct iw_freq *wextfreq = &wrqu->freq;
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
struct cfg80211_chan_def chandef = {
.width = NL80211_CHAN_WIDTH_20_NOHT,
};
int freq, ret;
wiphy_lock(&rdev->wiphy);
switch (wdev->iftype) {
case NL80211_IFTYPE_STATION:
ret = cfg80211_mgd_wext_siwfreq(dev, info, wextfreq, extra);
break;
case NL80211_IFTYPE_ADHOC:
ret = cfg80211_ibss_wext_siwfreq(dev, info, wextfreq, extra);
break;
case NL80211_IFTYPE_MONITOR:
freq = cfg80211_wext_freq(wextfreq);
if (freq < 0) {
ret = freq;
break;
}
if (freq == 0) {
ret = -EINVAL;
break;
}
chandef.center_freq1 = freq;
chandef.chan = ieee80211_get_channel(&rdev->wiphy, freq);
if (!chandef.chan) {
ret = -EINVAL;
break;
}
ret = cfg80211_set_monitor_channel(rdev, &chandef);
break;
case NL80211_IFTYPE_MESH_POINT:
freq = cfg80211_wext_freq(wextfreq);
if (freq < 0) {
ret = freq;
break;
}
if (freq == 0) {
ret = -EINVAL;
break;
}
chandef.center_freq1 = freq;
chandef.chan = ieee80211_get_channel(&rdev->wiphy, freq);
if (!chandef.chan) {
ret = -EINVAL;
break;
}
ret = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
break;
default:
ret = -EOPNOTSUPP;
break;
}
wiphy_unlock(&rdev->wiphy);
return ret;
}
static int cfg80211_wext_giwfreq(struct net_device *dev,
struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
{
struct iw_freq *freq = &wrqu->freq;
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
struct cfg80211_chan_def chandef = {};
int ret;
wiphy_lock(&rdev->wiphy);
switch (wdev->iftype) {
case NL80211_IFTYPE_STATION:
ret = cfg80211_mgd_wext_giwfreq(dev, info, freq, extra);
break;
case NL80211_IFTYPE_ADHOC:
ret = cfg80211_ibss_wext_giwfreq(dev, info, freq, extra);
break;
case NL80211_IFTYPE_MONITOR:
if (!rdev->ops->get_channel) {
ret = -EINVAL;
break;
}
ret = rdev_get_channel(rdev, wdev, 0, &chandef);
if (ret)
break;
freq->m = chandef.chan->center_freq;
freq->e = 6;
ret = 0;
break;
default:
ret = -EINVAL;
break;
}
wiphy_unlock(&rdev->wiphy);
return ret;
}
static int cfg80211_wext_siwtxpower(struct net_device *dev,
struct iw_request_info *info,
union iwreq_data *data, char *extra)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
enum nl80211_tx_power_setting type;
int dbm = 0;
int ret;
if ((data->txpower.flags & IW_TXPOW_TYPE) != IW_TXPOW_DBM)
return -EINVAL;
if (data->txpower.flags & IW_TXPOW_RANGE)
return -EINVAL;
if (!rdev->ops->set_tx_power)
return -EOPNOTSUPP;
/* only change when not disabling */
if (!data->txpower.disabled) {
rfkill_set_sw_state(rdev->wiphy.rfkill, false);
if (data->txpower.fixed) {
/*
* wext doesn't support negative values, see
* below where it's for automatic
*/
if (data->txpower.value < 0)
return -EINVAL;
dbm = data->txpower.value;
type = NL80211_TX_POWER_FIXED;
/* TODO: do regulatory check! */
} else {
/*
* Automatic power level setting, max being the value
* passed in from userland.
*/
if (data->txpower.value < 0) {
type = NL80211_TX_POWER_AUTOMATIC;
} else {
dbm = data->txpower.value;
type = NL80211_TX_POWER_LIMITED;
}
}
} else {
if (rfkill_set_sw_state(rdev->wiphy.rfkill, true))
schedule_work(&rdev->rfkill_block);
return 0;
}
wiphy_lock(&rdev->wiphy);
ret = rdev_set_tx_power(rdev, wdev, type, DBM_TO_MBM(dbm));
wiphy_unlock(&rdev->wiphy);
return ret;
}
static int cfg80211_wext_giwtxpower(struct net_device *dev,
struct iw_request_info *info,
union iwreq_data *data, char *extra)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
int err, val;
if ((data->txpower.flags & IW_TXPOW_TYPE) != IW_TXPOW_DBM)
return -EINVAL;
if (data->txpower.flags & IW_TXPOW_RANGE)
return -EINVAL;
if (!rdev->ops->get_tx_power)
return -EOPNOTSUPP;
wiphy_lock(&rdev->wiphy);
err = rdev_get_tx_power(rdev, wdev, &val);
wiphy_unlock(&rdev->wiphy);
if (err)
return err;
/* well... oh well */
data->txpower.fixed = 1;
data->txpower.disabled = rfkill_blocked(rdev->wiphy.rfkill);
data->txpower.value = val;
data->txpower.flags = IW_TXPOW_DBM;
return 0;
}
static int cfg80211_set_auth_alg(struct wireless_dev *wdev,
s32 auth_alg)
{
int nr_alg = 0;
if (!auth_alg)
return -EINVAL;
if (auth_alg & ~(IW_AUTH_ALG_OPEN_SYSTEM |