linux/net/wireless/wext-compat.c

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/*
* 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 <johannes@sipsolutions.net>
*/
#include <linux/wireless.h>
#include <linux/nl80211.h>
#include <linux/if_arp.h>
#include <linux/etherdevice.h>
#include <net/iw_handler.h>
#include <net/cfg80211.h>
#include "core.h"
int cfg80211_wext_giwname(struct net_device *dev,
struct iw_request_info *info,
char *name, char *extra)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct ieee80211_supported_band *sband;
bool is_ht = false, is_a = false, is_b = false, is_g = false;
if (!wdev)
return -EOPNOTSUPP;
sband = wdev->wiphy->bands[IEEE80211_BAND_5GHZ];
if (sband) {
is_a = true;
is_ht |= sband->ht_cap.ht_supported;
}
sband = wdev->wiphy->bands[IEEE80211_BAND_2GHZ];
if (sband) {
int i;
/* Check for mandatory rates */
for (i = 0; i < sband->n_bitrates; i++) {
if (sband->bitrates[i].bitrate == 10)
is_b = true;
if (sband->bitrates[i].bitrate == 60)
is_g = true;
}
is_ht |= sband->ht_cap.ht_supported;
}
strcpy(name, "IEEE 802.11");
if (is_a)
strcat(name, "a");
if (is_b)
strcat(name, "b");
if (is_g)
strcat(name, "g");
if (is_ht)
strcat(name, "n");
return 0;
}
EXPORT_SYMBOL_GPL(cfg80211_wext_giwname);
int cfg80211_wext_siwmode(struct net_device *dev, struct iw_request_info *info,
u32 *mode, char *extra)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev;
struct vif_params vifparams;
enum nl80211_iftype type;
int ret;
if (!wdev)
return -EOPNOTSUPP;
rdev = wiphy_to_dev(wdev->wiphy);
if (!rdev->ops->change_virtual_intf)
return -EOPNOTSUPP;
/* don't support changing VLANs, you just re-create them */
if (wdev->iftype == NL80211_IFTYPE_AP_VLAN)
return -EOPNOTSUPP;
switch (*mode) {
case IW_MODE_INFRA:
type = NL80211_IFTYPE_STATION;
break;
case IW_MODE_ADHOC:
type = NL80211_IFTYPE_ADHOC;
break;
case IW_MODE_REPEAT:
type = NL80211_IFTYPE_WDS;
break;
case IW_MODE_MONITOR:
type = NL80211_IFTYPE_MONITOR;
break;
default:
return -EINVAL;
}
if (type == wdev->iftype)
return 0;
memset(&vifparams, 0, sizeof(vifparams));
ret = rdev->ops->change_virtual_intf(wdev->wiphy, dev, type,
NULL, &vifparams);
WARN_ON(!ret && wdev->iftype != type);
return ret;
}
EXPORT_SYMBOL_GPL(cfg80211_wext_siwmode);
int cfg80211_wext_giwmode(struct net_device *dev, struct iw_request_info *info,
u32 *mode, char *extra)
{
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_SYMBOL_GPL(cfg80211_wext_giwmode);
int cfg80211_wext_giwrange(struct net_device *dev,
struct iw_request_info *info,
struct iw_point *data, char *extra)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct iw_range *range = (struct iw_range *) extra;
enum ieee80211_band band;
int 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->encoding_size[0] = 5;
range->encoding_size[1] = 13;
range->num_encoding_sizes = 2;
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 = -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;
range->enc_capa = IW_ENC_CAPA_WPA | IW_ENC_CAPA_WPA2;
for (c = 0; c < wdev->wiphy->n_cipher_suites; c++) {
switch (wdev->wiphy->cipher_suites[c]) {
case WLAN_CIPHER_SUITE_TKIP:
range->enc_capa |= IW_ENC_CAPA_CIPHER_TKIP;
break;
case WLAN_CIPHER_SUITE_CCMP:
range->enc_capa |= IW_ENC_CAPA_CIPHER_CCMP;
break;
}
}
for (band = 0; band < IEEE80211_NUM_BANDS; band ++) {
int i;
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);
range->scan_capa |= IW_SCAN_CAPA_ESSID;
return 0;
}
EXPORT_SYMBOL_GPL(cfg80211_wext_giwrange);
int cfg80211_wext_siwmlme(struct net_device *dev,
struct iw_request_info *info,
struct iw_point *data, char *extra)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct iw_mlme *mlme = (struct iw_mlme *)extra;
struct cfg80211_registered_device *rdev;
union {
struct cfg80211_disassoc_request disassoc;
struct cfg80211_deauth_request deauth;
} cmd;
if (!wdev)
return -EOPNOTSUPP;
rdev = wiphy_to_dev(wdev->wiphy);
if (wdev->iftype != NL80211_IFTYPE_STATION)
return -EINVAL;
if (mlme->addr.sa_family != ARPHRD_ETHER)
return -EINVAL;
memset(&cmd, 0, sizeof(cmd));
switch (mlme->cmd) {
case IW_MLME_DEAUTH:
if (!rdev->ops->deauth)
return -EOPNOTSUPP;
cmd.deauth.peer_addr = mlme->addr.sa_data;
cmd.deauth.reason_code = mlme->reason_code;
return rdev->ops->deauth(wdev->wiphy, dev, &cmd.deauth);
case IW_MLME_DISASSOC:
if (!rdev->ops->disassoc)
return -EOPNOTSUPP;
cmd.disassoc.peer_addr = mlme->addr.sa_data;
cmd.disassoc.reason_code = mlme->reason_code;
return rdev->ops->disassoc(wdev->wiphy, dev, &cmd.disassoc);
default:
return -EOPNOTSUPP;
}
}
EXPORT_SYMBOL_GPL(cfg80211_wext_siwmlme);
/**
* cfg80211_wext_freq - get wext frequency for non-"auto"
* @wiphy: the wiphy
* @freq: the wext freq encoding
*
* Returns a channel, %NULL for auto, or an ERR_PTR for errors!
*/
struct ieee80211_channel *cfg80211_wext_freq(struct wiphy *wiphy,
struct iw_freq *freq)
{
struct ieee80211_channel *chan;
int f;
/*
* Parse frequency - return NULL for auto and
* -EINVAL for impossible things.
*/
if (freq->e == 0) {
if (freq->m < 0)
return NULL;
f = ieee80211_channel_to_frequency(freq->m);
} else {
int i, div = 1000000;
for (i = 0; i < freq->e; i++)
div /= 10;
if (div <= 0)
return ERR_PTR(-EINVAL);
f = freq->m / div;
}
/*
* Look up channel struct and return -EINVAL when
* it cannot be found.
*/
chan = ieee80211_get_channel(wiphy, f);
if (!chan)
return ERR_PTR(-EINVAL);
return chan;
}
EXPORT_SYMBOL_GPL(cfg80211_wext_freq);
int cfg80211_wext_siwrts(struct net_device *dev,
struct iw_request_info *info,
struct iw_param *rts, char *extra)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
u32 orts = wdev->wiphy->rts_threshold;
int err;
if (rts->disabled || !rts->fixed)
wdev->wiphy->rts_threshold = (u32) -1;
else if (rts->value < 0)
return -EINVAL;
else
wdev->wiphy->rts_threshold = rts->value;
err = rdev->ops->set_wiphy_params(wdev->wiphy,
WIPHY_PARAM_RTS_THRESHOLD);
if (err)
wdev->wiphy->rts_threshold = orts;
return err;
}
EXPORT_SYMBOL_GPL(cfg80211_wext_siwrts);
int cfg80211_wext_giwrts(struct net_device *dev,
struct iw_request_info *info,
struct iw_param *rts, char *extra)
{
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_SYMBOL_GPL(cfg80211_wext_giwrts);
int cfg80211_wext_siwfrag(struct net_device *dev,
struct iw_request_info *info,
struct iw_param *frag, char *extra)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
u32 ofrag = wdev->wiphy->frag_threshold;
int err;
if (frag->disabled || !frag->fixed)
wdev->wiphy->frag_threshold = (u32) -1;
else if (frag->value < 256)
return -EINVAL;
else {
/* Fragment length must be even, so strip LSB. */
wdev->wiphy->frag_threshold = frag->value & ~0x1;
}
err = rdev->ops->set_wiphy_params(wdev->wiphy,
WIPHY_PARAM_FRAG_THRESHOLD);
if (err)
wdev->wiphy->frag_threshold = ofrag;
return err;
}
EXPORT_SYMBOL_GPL(cfg80211_wext_siwfrag);
int cfg80211_wext_giwfrag(struct net_device *dev,
struct iw_request_info *info,
struct iw_param *frag, char *extra)
{
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_SYMBOL_GPL(cfg80211_wext_giwfrag);
int cfg80211_wext_siwretry(struct net_device *dev,
struct iw_request_info *info,
struct iw_param *retry, char *extra)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
u32 changed = 0;
u8 olong = wdev->wiphy->retry_long;
u8 oshort = wdev->wiphy->retry_short;
int err;
if (retry->disabled ||
(retry->flags & IW_RETRY_TYPE) != IW_RETRY_LIMIT)
return -EINVAL;
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;
}
if (!changed)
return 0;
err = rdev->ops->set_wiphy_params(wdev->wiphy, changed);
if (err) {
wdev->wiphy->retry_short = oshort;
wdev->wiphy->retry_long = olong;
}
return err;
}
EXPORT_SYMBOL_GPL(cfg80211_wext_siwretry);
int cfg80211_wext_giwretry(struct net_device *dev,
struct iw_request_info *info,
struct iw_param *retry, char *extra)
{
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;
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_SYMBOL_GPL(cfg80211_wext_giwretry);
static int cfg80211_set_encryption(struct cfg80211_registered_device *rdev,
struct net_device *dev, const u8 *addr,
bool remove, bool tx_key, int idx,
struct key_params *params)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
int err;
if (params->cipher == WLAN_CIPHER_SUITE_AES_CMAC) {
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 = rdev->ops->del_key(&rdev->wiphy, dev, idx, addr);
if (!err) {
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;
}
/*
* Applications using wireless extensions expect to be
* able to delete keys that don't exist, so allow that.
*/
if (err == -ENOENT)
return 0;
return err;
} else {
if (addr)
tx_key = false;
if (cfg80211_validate_key_settings(params, idx, addr))
return -EINVAL;
err = rdev->ops->add_key(&rdev->wiphy, dev, idx, addr, params);
if (err)
return err;
if (tx_key || (!addr && wdev->wext.default_key == -1)) {
err = rdev->ops->set_default_key(&rdev->wiphy,
dev, idx);
if (!err)
wdev->wext.default_key = idx;
return err;
}
if (params->cipher == WLAN_CIPHER_SUITE_AES_CMAC &&
(tx_key || (!addr && wdev->wext.default_mgmt_key == -1))) {
err = rdev->ops->set_default_mgmt_key(&rdev->wiphy,
dev, idx);
if (!err)
wdev->wext.default_mgmt_key = idx;
return err;
}
return 0;
}
}
int cfg80211_wext_siwencode(struct net_device *dev,
struct iw_request_info *info,
struct iw_point *erq, char *keybuf)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
int idx, err;
bool remove = false;
struct key_params params;
/* 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;
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--;
if (erq->flags & IW_ENCODE_DISABLED)
remove = true;
else if (erq->length == 0) {
/* No key data - just set the default TX key index */
err = rdev->ops->set_default_key(&rdev->wiphy, dev, idx);
if (!err)
wdev->wext.default_key = idx;
return err;
}
memset(&params, 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)
return -EINVAL;
return cfg80211_set_encryption(rdev, dev, NULL, remove,
wdev->wext.default_key == -1,
idx, &params);
}
EXPORT_SYMBOL_GPL(cfg80211_wext_siwencode);
int cfg80211_wext_siwencodeext(struct net_device *dev,
struct iw_request_info *info,
struct iw_point *erq, char *extra)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev = wiphy_to_dev(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;
/* 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;
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(&params, 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;
}
return cfg80211_set_encryption(
rdev, dev, addr, remove,
ext->ext_flags & IW_ENCODE_EXT_SET_TX_KEY,
idx, &params);
}
EXPORT_SYMBOL_GPL(cfg80211_wext_siwencodeext);
struct giwencode_cookie {
size_t buflen;
char *keybuf;
};
static void giwencode_get_key_cb(void *cookie, struct key_params *params)
{
struct giwencode_cookie *data = cookie;
if (!params->key) {
data->buflen = 0;
return;
}
data->buflen = min_t(size_t, data->buflen, params->key_len);
memcpy(data->keybuf, params->key, data->buflen);
}
int cfg80211_wext_giwencode(struct net_device *dev,
struct iw_request_info *info,
struct iw_point *erq, char *keybuf)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
int idx, err;
struct giwencode_cookie data = {
.keybuf = keybuf,
.buflen = erq->length,
};
if (!rdev->ops->get_key)
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;
err = rdev->ops->get_key(&rdev->wiphy, dev, idx, NULL, &data,
giwencode_get_key_cb);
if (!err) {
erq->length = data.buflen;
erq->flags |= IW_ENCODE_ENABLED;
return 0;
}
if (err == -ENOENT) {
erq->flags |= IW_ENCODE_DISABLED;
erq->length = 0;
return 0;
}
return err;
}
EXPORT_SYMBOL_GPL(cfg80211_wext_giwencode);
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_dev(wdev->wiphy);
enum tx_power_setting type;
int dbm = 0;
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->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 = 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 = TX_POWER_AUTOMATIC;
} else {
dbm = data->txpower.value;
type = TX_POWER_LIMITED;
}
}
} else {
rfkill_set_sw_state(rdev->rfkill, true);
schedule_work(&rdev->rfkill_sync);
return 0;
}
return rdev->ops->set_tx_power(wdev->wiphy, type, dbm);;
}
EXPORT_SYMBOL_GPL(cfg80211_wext_siwtxpower);
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_dev(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;
err = rdev->ops->get_tx_power(wdev->wiphy, &val);
if (err)
return err;
/* well... oh well */
data->txpower.fixed = 1;
data->txpower.disabled = rfkill_blocked(rdev->rfkill);
data->txpower.value = val;
data->txpower.flags = IW_TXPOW_DBM;
return 0;
}
EXPORT_SYMBOL_GPL(cfg80211_wext_giwtxpower);