// 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 <johannes@sipsolutions.net>

   * Copyright (C) 2019 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,
  			  char *name, char *extra)
  {

  	strcpy(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,
  			  u32 *mode, char *extra)
  {
  	struct wireless_dev *wdev = dev->ieee80211_ptr;
  	struct cfg80211_registered_device *rdev;
  	struct vif_params vifparams;
  	enum nl80211_iftype type;

  	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_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));

  	return cfg80211_change_iface(rdev, dev, type, &vifparams);

  }

  EXPORT_WEXT_HANDLER(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_WEXT_HANDLER(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 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,
  			 struct iw_param *rts, char *extra)
  {
  	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;
  
  	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_set_wiphy_params(rdev, WIPHY_PARAM_RTS_THRESHOLD);

  	if (err)
  		wdev->wiphy->rts_threshold = orts;
  
  	return err;
  }

  EXPORT_WEXT_HANDLER(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_WEXT_HANDLER(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_rdev(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_set_wiphy_params(rdev, WIPHY_PARAM_FRAG_THRESHOLD);

  	if (err)
  		wdev->wiphy->frag_threshold = ofrag;
  
  	return err;
  }

  EXPORT_WEXT_HANDLER(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_WEXT_HANDLER(cfg80211_wext_giwfrag);

  static 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_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;
  
  	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;
  	}
  
  	return err;
  }

  
  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 | 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 (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 < CFG80211_MAX_WEP_KEYS; 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->current_bss)
  			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->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, 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->current_bss)

  		err = rdev_add_key(rdev, dev, 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->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, 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->current_bss)

  			err = rdev_set_default_mgmt_key(rdev, dev, idx);

  		if (!err)
  			wdev->wext.default_mgmt_key = idx;
  		return err;

  	}

  
  	return 0;
  }
  
  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)

  {
  	int err;
  
  	wdev_lock(dev->ieee80211_ptr);

  	err = __cfg80211_set_encryption(rdev, dev, pairwise, addr,
  					remove, tx_key, idx, params);

  	wdev_unlock(dev->ieee80211_ptr);
  
  	return err;

  }

  static 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_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;
  
  	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 = 0;
  		wdev_lock(wdev);
  		if (wdev->current_bss)

  			err = rdev_set_default_key(rdev, dev, idx, true,
  						   true);

  		if (!err)
  			wdev->wext.default_key = idx;

  		wdev_unlock(wdev);

  		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, false, NULL, remove,

  				       wdev->wext.default_key == -1,
  				       idx, &params);
  }

  static 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_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;

  	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;
  
  	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,
  			!(ext->ext_flags & IW_ENCODE_EXT_GROUP_KEY),
  			addr, remove,

  			ext->ext_flags & IW_ENCODE_EXT_SET_TX_KEY,
  			idx, &params);
  }

  static 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;

  	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,
  				 struct iw_freq *wextfreq, char *extra)

  {
  	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;

  
  	switch (wdev->iftype) {
  	case NL80211_IFTYPE_STATION:

  		return cfg80211_mgd_wext_siwfreq(dev, info, wextfreq, extra);

  	case NL80211_IFTYPE_ADHOC:

  		return cfg80211_ibss_wext_siwfreq(dev, info, wextfreq, extra);

  	case NL80211_IFTYPE_MONITOR:

  		freq = cfg80211_wext_freq(wextfreq);

  		if (freq < 0)
  			return freq;
  		if (freq == 0)

  			return -EINVAL;

  		chandef.center_freq1 = freq;

  		chandef.chan = ieee80211_get_channel(&rdev->wiphy, freq);
  		if (!chandef.chan)
  			return -EINVAL;

  		return cfg80211_set_monitor_channel(rdev, &chandef);

  	case NL80211_IFTYPE_MESH_POINT:

  		freq = cfg80211_wext_freq(wextfreq);

  		if (freq < 0)
  			return freq;
  		if (freq == 0)
  			return -EINVAL;

  		chandef.center_freq1 = freq;

  		chandef.chan = ieee80211_get_channel(&rdev->wiphy, freq);
  		if (!chandef.chan)
  			return -EINVAL;

  		return cfg80211_set_mesh_channel(rdev, wdev, &chandef);

  	default:
  		return -EOPNOTSUPP;

  	}
  }

  static int cfg80211_wext_giwfreq(struct net_device *dev,
  				 struct iw_request_info *info,
  				 struct iw_freq *freq, char *extra)

  {
  	struct wireless_dev *wdev = dev->ieee80211_ptr;

  	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);

  	struct cfg80211_chan_def chandef = {};

  	int ret;

  
  	switch (wdev->iftype) {
  	case NL80211_IFTYPE_STATION:
  		return cfg80211_mgd_wext_giwfreq(dev, info, freq, extra);
  	case NL80211_IFTYPE_ADHOC:
  		return cfg80211_ibss_wext_giwfreq(dev, info, freq, extra);

  	case NL80211_IFTYPE_MONITOR:

  		if (!rdev->ops->get_channel)

  			return -EINVAL;

  		ret = rdev_get_channel(rdev, wdev, &chandef);
  		if (ret)
  			return ret;
  		freq->m = chandef.chan->center_freq;

  		freq->e = 6;
  		return 0;

  	default:

  		return -EINVAL;

  	}
  }

  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;
  
  	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 = 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->rfkill, true))
  			schedule_work(&rdev->rfkill_block);

  		return 0;

  	}

  	return rdev_set_tx_power(rdev, wdev, type, DBM_TO_MBM(dbm));

  }

  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;

  	err = rdev_get_tx_power(rdev, wdev, &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;
  }

  
  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 |
  			 IW_AUTH_ALG_SHARED_KEY |
  			 IW_AUTH_ALG_LEAP))
  		return -EINVAL;
  
  	if (auth_alg & IW_AUTH_ALG_OPEN_SYSTEM) {
  		nr_alg++;
  		wdev->wext.connect.auth_type = NL80211_AUTHTYPE_OPEN_SYSTEM;
  	}
  
  	if (auth_alg & IW_AUTH_ALG_SHARED_KEY) {
  		nr_alg++;
  		wdev->wext.connect.auth_type = NL80211_AUTHTYPE_SHARED_KEY;
  	}
  
  	if (auth_alg & IW_AUTH_ALG_LEAP) {
  		nr_alg++;
  		wdev->wext.connect.auth_type = NL80211_AUTHTYPE_NETWORK_EAP;
  	}
  
  	if (nr_alg > 1)
  		wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
  
  	return 0;
  }
  
  static int cfg80211_set_wpa_version(struct wireless_dev *wdev, u32 wpa_versions)
  {

  	if (wpa_versions & ~(IW_AUTH_WPA_VERSION_WPA |

  			     IW_AUTH_WPA_VERSION_WPA2|
  		             IW_AUTH_WPA_VERSION_DISABLED))

  		return -EINVAL;

  	if ((wpa_versions & IW_AUTH_WPA_VERSION_DISABLED) &&
  	    (wpa_versions & (IW_AUTH_WPA_VERSION_WPA|
  			     IW_AUTH_WPA_VERSION_WPA2)))
  		return -EINVAL;
  
  	if (wpa_versions & IW_AUTH_WPA_VERSION_DISABLED)
  		wdev->wext.connect.crypto.wpa_versions &=
  			~(NL80211_WPA_VERSION_1|NL80211_WPA_VERSION_2);

  	if (wpa_versions & IW_AUTH_WPA_VERSION_WPA)
  		wdev->wext.connect.crypto.wpa_versions |=
  			NL80211_WPA_VERSION_1;
  
  	if (wpa_versions & IW_AUTH_WPA_VERSION_WPA2)
  		wdev->wext.connect.crypto.wpa_versions |=
  			NL80211_WPA_VERSION_2;
  
  	return 0;
  }

  static int cfg80211_set_cipher_group(struct wireless_dev *wdev, u32 cipher)

  {

  	if (cipher & IW_AUTH_CIPHER_WEP40)
  		wdev->wext.connect.crypto.cipher_group =
  			WLAN_CIPHER_SUITE_WEP40;
  	else if (cipher & IW_AUTH_CIPHER_WEP104)
  		wdev->wext.connect.crypto.cipher_group =
  			WLAN_CIPHER_SUITE_WEP104;
  	else if (cipher & IW_AUTH_CIPHER_TKIP)
  		wdev->wext.connect.crypto.cipher_group =
  			WLAN_CIPHER_SUITE_TKIP;
  	else if (cipher & IW_AUTH_CIPHER_CCMP)
  		wdev->wext.connect.crypto.cipher_group =
  			WLAN_CIPHER_SUITE_CCMP;
  	else if (cipher & IW_AUTH_CIPHER_AES_CMAC)
  		wdev->wext.connect.crypto.cipher_group =
  			WLAN_CIPHER_SUITE_AES_CMAC;

  	else if (cipher & IW_AUTH_CIPHER_NONE)
  		wdev->wext.connect.crypto.cipher_group = 0;

  	else
  		return -EINVAL;
  
  	return 0;
  }

  static int cfg80211_set_cipher_pairwise(struct wireless_dev *wdev, u32 cipher)

  {
  	int nr_ciphers = 0;
  	u32 *ciphers_pairwise = wdev->wext.connect.crypto.ciphers_pairwise;
  
  	if (cipher & IW_AUTH_CIPHER_WEP40) {
  		ciphers_pairwise[nr_ciphers] = WLAN_CIPHER_SUITE_WEP40;
  		nr_ciphers++;
  	}
  
  	if (cipher & IW_AUTH_CIPHER_WEP104) {
  		ciphers_pairwise[nr_ciphers] = WLAN_CIPHER_SUITE_WEP104;
  		nr_ciphers++;
  	}
  
  	if (cipher & IW_AUTH_CIPHER_TKIP) {
  		ciphers_pairwise[nr_ciphers] = WLAN_CIPHER_SUITE_TKIP;
  		nr_ciphers++;
  	}
  
  	if (cipher & IW_AUTH_CIPHER_CCMP) {
  		ciphers_pairwise[nr_ciphers] = WLAN_CIPHER_SUITE_CCMP;
  		nr_ciphers++;
  	}
  
  	if (cipher & IW_AUTH_CIPHER_AES_CMAC) {
  		ciphers_pairwise[nr_ciphers] = WLAN_CIPHER_SUITE_AES_CMAC;
  		nr_ciphers++;
  	}
  
  	BUILD_BUG_ON(NL80211_MAX_NR_CIPHER_SUITES < 5);
  
  	wdev->wext.connect.crypto.n_ciphers_pairwise = nr_ciphers;
  
  	return 0;
  }

  static int cfg80211_set_key_mgt(struct wireless_dev *wdev, u32 key_mgt)

  {
  	int nr_akm_suites = 0;
  
  	if (key_mgt & ~(IW_AUTH_KEY_MGMT_802_1X |
  			IW_AUTH_KEY_MGMT_PSK))
  		return -EINVAL;
  
  	if (key_mgt & IW_AUTH_KEY_MGMT_802_1X) {
  		wdev->wext.connect.crypto.akm_suites[nr_akm_suites] =
  			WLAN_AKM_SUITE_8021X;
  		nr_akm_suites++;
  	}
  
  	if (key_mgt & IW_AUTH_KEY_MGMT_PSK) {
  		wdev->wext.connect.crypto.akm_suites[nr_akm_suites] =
  			WLAN_AKM_SUITE_PSK;
  		nr_akm_suites++;
  	}
  
  	wdev->wext.connect.crypto.n_akm_suites = nr_akm_suites;
  
  	return 0;
  }

  static int cfg80211_wext_siwauth(struct net_device *dev,
  				 struct iw_request_info *info,
  				 struct iw_param *data, char *extra)

  {
  	struct wireless_dev *wdev = dev->ieee80211_ptr;
  
  	if (wdev->iftype != NL80211_IFTYPE_STATION)
  		return -EOPNOTSUPP;
  
  	switch (data->flags & IW_AUTH_INDEX) {
  	case IW_AUTH_PRIVACY_INVOKED:
  		wdev->wext.connect.privacy = data->value;
  		return 0;
  	case IW_AUTH_WPA_VERSION:
  		return cfg80211_set_wpa_version(wdev, data->value);
  	case IW_AUTH_CIPHER_GROUP:
  		return cfg80211_set_cipher_group(wdev, data->value);
  	case IW_AUTH_KEY_MGMT:
  		return cfg80211_set_key_mgt(wdev, data->value);
  	case IW_AUTH_CIPHER_PAIRWISE:
  		return cfg80211_set_cipher_pairwise(wdev, data->value);
  	case IW_AUTH_80211_AUTH_ALG:
  		return cfg80211_set_auth_alg(wdev, data->value);
  	case IW_AUTH_WPA_ENABLED:
  	case IW_AUTH_RX_UNENCRYPTED_EAPOL:
  	case IW_AUTH_DROP_UNENCRYPTED:
  	case IW_AUTH_MFP:
  		return 0;
  	default:
  		return -EOPNOTSUPP;
  	}
  }

  static int cfg80211_wext_giwauth(struct net_device *dev,
  				 struct iw_request_info *info,
  				 struct iw_param *data, char *extra)

  {
  	/* XXX: what do we need? */
  
  	return -EOPNOTSUPP;
  }

  static int cfg80211_wext_siwpower(struct net_device *dev,
  				  struct iw_request_info *info,
  				  struct iw_param *wrq, char *extra)

  {
  	struct wireless_dev *wdev = dev->ieee80211_ptr;

  	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);

  	bool ps = wdev->ps;
  	int timeout = wdev->ps_timeout;

  	int err;
  
  	if (wdev->iftype != NL80211_IFTYPE_STATION)
  		return -EINVAL;
  
  	if (!rdev->ops->set_power_mgmt)
  		return -EOPNOTSUPP;
  
  	if (wrq->disabled) {
  		ps = false;
  	} else {
  		switch (wrq->flags & IW_POWER_MODE) {
  		case IW_POWER_ON:       /* If not specified */
  		case IW_POWER_MODE:     /* If set all mask */
  		case IW_POWER_ALL_R:    /* If explicitely state all */
  			ps = true;
  			break;
  		default:                /* Otherwise we ignore */
  			return -EINVAL;
  		}
  
  		if (wrq->flags & ~(IW_POWER_MODE | IW_POWER_TIMEOUT))
  			return -EINVAL;
  
  		if (wrq->flags & IW_POWER_TIMEOUT)
  			timeout = wrq->value / 1000;
  	}

  	err = rdev_set_power_mgmt(rdev, dev, ps, timeout);

  	if (err)
  		return err;

  	wdev->ps = ps;
  	wdev->ps_timeout = timeout;

  
  	return 0;
  
  }

  static int cfg80211_wext_giwpower(struct net_device *dev,
  				  struct iw_request_info *info,
  				  struct iw_param *wrq, char *extra)

  {
  	struct wireless_dev *wdev = dev->ieee80211_ptr;

  	wrq->disabled = !wdev->ps;

  
  	return 0;
  }

  static int cfg80211_wds_wext_siwap(struct net_device *dev,
  				   struct iw_request_info *info,
  				   struct sockaddr *addr, char *extra)

  {
  	struct wireless_dev *wdev = dev->ieee80211_ptr;

  	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);

  	int err;
  
  	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_WDS))
  		return -EINVAL;
  
  	if (addr->sa_family != ARPHRD_ETHER)
  		return -EINVAL;
  
  	if (netif_running(dev))
  		return -EBUSY;
  
  	if (!rdev->ops->set_wds_peer)
  		return -EOPNOTSUPP;

  	err = rdev_set_wds_peer(rdev, dev, (u8 *)&addr->sa_data);

  	if (err)
  		return err;
  
  	memcpy(&wdev->wext.bssid, (u8 *) &addr->sa_data, ETH_ALEN);
  
  	return 0;
  }

  static int cfg80211_wds_wext_giwap(struct net_device *dev,
  				   struct iw_request_info *info,
  				   struct sockaddr *addr, char *extra)

  {
  	struct wireless_dev *wdev = dev->ieee80211_ptr;
  
  	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_WDS))
  		return -EINVAL;
  
  	addr->sa_family = ARPHRD_ETHER;
  	memcpy(&addr->sa_data, wdev->wext.bssid, ETH_ALEN);
  
  	return 0;
  }

  static int cfg80211_wext_siwrate(struct net_device *dev,
  				 struct iw_request_info *info,
  				 struct iw_param *rate, char *extra)

  {
  	struct wireless_dev *wdev = dev->ieee80211_ptr;

  	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);

  	struct cfg80211_bitrate_mask mask;

  	u32 fixed, maxrate;
  	struct ieee80211_supported_band *sband;
  	int band, ridx;
  	bool match = false;

  
  	if (!rdev->ops->set_bitrate_mask)
  		return -EOPNOTSUPP;

  	memset(&mask, 0, sizeof(mask));
  	fixed = 0;

  	maxrate = (u32)-1;

  
  	if (rate->value < 0) {
  		/* nothing */
  	} else if (rate->fixed) {

  		fixed = rate->value / 100000;

  	} else {

  		maxrate = rate->value / 100000;
  	}

  	for (band = 0; band < NUM_NL80211_BANDS; band++) {

  		sband = wdev->wiphy->bands[band];
  		if (sband == NULL)
  			continue;
  		for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
  			struct ieee80211_rate *srate = &sband->bitrates[ridx];
  			if (fixed == srate->bitrate) {
  				mask.control[band].legacy = 1 << ridx;
  				match = true;
  				break;
  			}
  			if (srate->bitrate <= maxrate) {
  				mask.control[band].legacy |= 1 << ridx;
  				match = true;
  			}
  		}

  	}

  	if (!match)
  		return -EINVAL;

  	return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);

  }

  static int cfg80211_wext_giwrate(struct net_device *dev,
  				 struct iw_request_info *info,
  				 struct iw_param *rate, char *extra)

  {
  	struct wireless_dev *wdev = dev->ieee80211_ptr;

  	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);

  	struct station_info sinfo = {};

  	u8 addr[ETH_ALEN];

  	int err;
  
  	if (wdev->iftype != NL80211_IFTYPE_STATION)
  		return -EOPNOTSUPP;
  
  	if (!rdev->ops->get_station)
  		return -EOPNOTSUPP;

  	err = 0;
  	wdev_lock(wdev);

  	if (wdev->current_bss)

  		memcpy(addr, wdev->current_bss->pub.bssid, ETH_ALEN);

  	else

  		err = -EOPNOTSUPP;
  	wdev_unlock(wdev);
  	if (err)
  		return err;

  	err = rdev_get_station(rdev, dev, addr, &sinfo);

  	if (err)
  		return err;

  	if (!(sinfo.filled & BIT_ULL(NL80211_STA_INFO_TX_BITRATE))) {
  		err = -EOPNOTSUPP;
  		goto free;
  	}

  	rate->value = 100000 * cfg80211_calculate_bitrate(&sinfo.txrate);

  free:
  	cfg80211_sinfo_release_content(&sinfo);
  	return err;

  }

  
  /* Get wireless statistics.  Called by /proc/net/wireless and by SIOCGIWSTATS */

  static struct iw_statistics *cfg80211_wireless_stats(struct net_device *dev)

  {
  	struct wireless_dev *wdev = dev->ieee80211_ptr;

  	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);

  	/* we are under RTNL - globally locked - so can use static structs */
  	static struct iw_statistics wstats;

  	static struct station_info sinfo = {};

  	u8 bssid[ETH_ALEN];

  
  	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION)
  		return NULL;
  
  	if (!rdev->ops->get_station)
  		return NULL;

  	/* Grab BSSID of current BSS, if any */
  	wdev_lock(wdev);
  	if (!wdev->current_bss) {
  		wdev_unlock(wdev);

  		return NULL;

  	}
  	memcpy(bssid, wdev->current_bss->pub.bssid, ETH_ALEN);
  	wdev_unlock(wdev);

  	memset(&sinfo, 0, sizeof(sinfo));

  	if (rdev_get_station(rdev, dev, bssid, &sinfo))

  		return NULL;
  
  	memset(&wstats, 0, sizeof(wstats));
  
  	switch (rdev->wiphy.signal_type) {
  	case CFG80211_SIGNAL_TYPE_MBM:

  		if (sinfo.filled & BIT_ULL(NL80211_STA_INFO_SIGNAL)) {

  			int sig = sinfo.signal;
  			wstats.qual.updated |= IW_QUAL_LEVEL_UPDATED;
  			wstats.qual.updated |= IW_QUAL_QUAL_UPDATED;
  			wstats.qual.updated |= IW_QUAL_DBM;
  			wstats.qual.level = sig;
  			if (sig < -110)
  				sig = -110;
  			else if (sig > -40)
  				sig = -40;
  			wstats.qual.qual = sig + 110;
  			break;
  		}

  		fallthrough;

  	case CFG80211_SIGNAL_TYPE_UNSPEC:

  		if (sinfo.filled & BIT_ULL(NL80211_STA_INFO_SIGNAL)) {

  			wstats.qual.updated |= IW_QUAL_LEVEL_UPDATED;
  			wstats.qual.updated |= IW_QUAL_QUAL_UPDATED;
  			wstats.qual.level = sinfo.signal;
  			wstats.qual.qual = sinfo.signal;
  			break;
  		}

  		fallthrough;

  	default:
  		wstats.qual.updated |= IW_QUAL_LEVEL_INVALID;
  		wstats.qual.updated |= IW_QUAL_QUAL_INVALID;
  	}
  
  	wstats.qual.updated |= IW_QUAL_NOISE_INVALID;

  	if (sinfo.filled & BIT_ULL(NL80211_STA_INFO_RX_DROP_MISC))

  		wstats.discard.misc = sinfo.rx_dropped_misc;

  	if (sinfo.filled & BIT_ULL(NL80211_STA_INFO_TX_FAILED))

  		wstats.discard.retries = sinfo.tx_failed;

  	cfg80211_sinfo_release_content(&sinfo);

  	return &wstats;
  }

  static int cfg80211_wext_siwap(struct net_device *dev,
  			       struct iw_request_info *info,
  			       struct sockaddr *ap_addr, char *extra)

  {
  	struct wireless_dev *wdev = dev->ieee80211_ptr;
  
  	switch (wdev->iftype) {
  	case NL80211_IFTYPE_ADHOC:
  		return cfg80211_ibss_wext_siwap(dev, info, ap_addr, extra);
  	case NL80211_IFTYPE_STATION:
  		return cfg80211_mgd_wext_siwap(dev, info, ap_addr, extra);
  	case NL80211_IFTYPE_WDS:
  		return cfg80211_wds_wext_siwap(dev, info, ap_addr, extra);
  	default:
  		return -EOPNOTSUPP;
  	}
  }

  static int cfg80211_wext_giwap(struct net_device *dev,
  			       struct iw_request_info *info,
  			       struct sockaddr *ap_addr, char *extra)

  {
  	struct wireless_dev *wdev = dev->ieee80211_ptr;
  
  	switch (wdev->iftype) {
  	case NL80211_IFTYPE_ADHOC:
  		return cfg80211_ibss_wext_giwap(dev, info, ap_addr, extra);
  	case NL80211_IFTYPE_STATION:
  		return cfg80211_mgd_wext_giwap(dev, info, ap_addr, extra);
  	case NL80211_IFTYPE_WDS:
  		return cfg80211_wds_wext_giwap(dev, info, ap_addr, extra);
  	default:
  		return -EOPNOTSUPP;
  	}
  }

  static int cfg80211_wext_siwessid(struct net_device *dev,
  				  struct iw_request_info *info,
  				  struct iw_point *data, char *ssid)

  {
  	struct wireless_dev *wdev = dev->ieee80211_ptr;
  
  	switch (wdev->iftype) {
  	case NL80211_IFTYPE_ADHOC:
  		return cfg80211_ibss_wext_siwessid(dev, info, data, ssid);
  	case NL80211_IFTYPE_STATION:
  		return cfg80211_mgd_wext_siwessid(dev, info, data, ssid);
  	default:
  		return -EOPNOTSUPP;
  	}
  }

  static int cfg80211_wext_giwessid(struct net_device *dev,
  				  struct iw_request_info *info,
  				  struct iw_point *data, char *ssid)

  {
  	struct wireless_dev *wdev = dev->ieee80211_ptr;

  	data->flags = 0;
  	data->length = 0;

  	switch (wdev->iftype) {
  	case NL80211_IFTYPE_ADHOC:
  		return cfg80211_ibss_wext_giwessid(dev, info, data, ssid);
  	case NL80211_IFTYPE_STATION:
  		return cfg80211_mgd_wext_giwessid(dev, info, data, ssid);
  	default:
  		return -EOPNOTSUPP;
  	}
  }

  static int cfg80211_wext_siwpmksa(struct net_device *dev,
  				  struct iw_request_info *info,
  				  struct iw_point *data, char *extra)

  {
  	struct wireless_dev *wdev = dev->ieee80211_ptr;

  	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);

  	struct cfg80211_pmksa cfg_pmksa;
  	struct iw_pmksa *pmksa = (struct iw_pmksa *)extra;
  
  	memset(&cfg_pmksa, 0, sizeof(struct cfg80211_pmksa));
  
  	if (wdev->iftype != NL80211_IFTYPE_STATION)
  		return -EINVAL;
  
  	cfg_pmksa.bssid = pmksa->bssid.sa_data;
  	cfg_pmksa.pmkid = pmksa->pmkid;
  
  	switch (pmksa->cmd) {
  	case IW_PMKSA_ADD:
  		if (!rdev->ops->set_pmksa)
  			return -EOPNOTSUPP;

  		return rdev_set_pmksa(rdev, dev, &cfg_pmksa);

  
  	case IW_PMKSA_REMOVE:
  		if (!rdev->ops->del_pmksa)
  			return -EOPNOTSUPP;

  		return rdev_del_pmksa(rdev, dev, &cfg_pmksa);

  
  	case IW_PMKSA_FLUSH:
  		if (!rdev->ops->flush_pmksa)
  			return -EOPNOTSUPP;

  		return rdev_flush_pmksa(rdev, dev);

  
  	default:
  		return -EOPNOTSUPP;
  	}
  }

  static const iw_handler cfg80211_handlers[] = {
  	[IW_IOCTL_IDX(SIOCGIWNAME)]	= (iw_handler) cfg80211_wext_giwname,
  	[IW_IOCTL_IDX(SIOCSIWFREQ)]	= (iw_handler) cfg80211_wext_siwfreq,
  	[IW_IOCTL_IDX(SIOCGIWFREQ)]	= (iw_handler) cfg80211_wext_giwfreq,
  	[IW_IOCTL_IDX(SIOCSIWMODE)]	= (iw_handler) cfg80211_wext_siwmode,
  	[IW_IOCTL_IDX(SIOCGIWMODE)]	= (iw_handler) cfg80211_wext_giwmode,
  	[IW_IOCTL_IDX(SIOCGIWRANGE)]	= (iw_handler) cfg80211_wext_giwrange,
  	[IW_IOCTL_IDX(SIOCSIWAP)]	= (iw_handler) cfg80211_wext_siwap,
  	[IW_IOCTL_IDX(SIOCGIWAP)]	= (iw_handler) cfg80211_wext_giwap,
  	[IW_IOCTL_IDX(SIOCSIWMLME)]	= (iw_handler) cfg80211_wext_siwmlme,
  	[IW_IOCTL_IDX(SIOCSIWSCAN)]	= (iw_handler) cfg80211_wext_siwscan,
  	[IW_IOCTL_IDX(SIOCGIWSCAN)]	= (iw_handler) cfg80211_wext_giwscan,
  	[IW_IOCTL_IDX(SIOCSIWESSID)]	= (iw_handler) cfg80211_wext_siwessid,
  	[IW_IOCTL_IDX(SIOCGIWESSID)]	= (iw_handler) cfg80211_wext_giwessid,
  	[IW_IOCTL_IDX(SIOCSIWRATE)]	= (iw_handler) cfg80211_wext_siwrate,
  	[IW_IOCTL_IDX(SIOCGIWRATE)]	= (iw_handler) cfg80211_wext_giwrate,
  	[IW_IOCTL_IDX(SIOCSIWRTS)]	= (iw_handler) cfg80211_wext_siwrts,
  	[IW_IOCTL_IDX(SIOCGIWRTS)]	= (iw_handler) cfg80211_wext_giwrts,
  	[IW_IOCTL_IDX(SIOCSIWFRAG)]	= (iw_handler) cfg80211_wext_siwfrag,
  	[IW_IOCTL_IDX(SIOCGIWFRAG)]	= (iw_handler) cfg80211_wext_giwfrag,
  	[IW_IOCTL_IDX(SIOCSIWTXPOW)]	= (iw_handler) cfg80211_wext_siwtxpower,
  	[IW_IOCTL_IDX(SIOCGIWTXPOW)]	= (iw_handler) cfg80211_wext_giwtxpower,
  	[IW_IOCTL_IDX(SIOCSIWRETRY)]	= (iw_handler) cfg80211_wext_siwretry,
  	[IW_IOCTL_IDX(SIOCGIWRETRY)]	= (iw_handler) cfg80211_wext_giwretry,
  	[IW_IOCTL_IDX(SIOCSIWENCODE)]	= (iw_handler) cfg80211_wext_siwencode,
  	[IW_IOCTL_IDX(SIOCGIWENCODE)]	= (iw_handler) cfg80211_wext_giwencode,
  	[IW_IOCTL_IDX(SIOCSIWPOWER)]	= (iw_handler) cfg80211_wext_siwpower,
  	[IW_IOCTL_IDX(SIOCGIWPOWER)]	= (iw_handler) cfg80211_wext_giwpower,
  	[IW_IOCTL_IDX(SIOCSIWGENIE)]	= (iw_handler) cfg80211_wext_siwgenie,
  	[IW_IOCTL_IDX(SIOCSIWAUTH)]	= (iw_handler) cfg80211_wext_siwauth,
  	[IW_IOCTL_IDX(SIOCGIWAUTH)]	= (iw_handler) cfg80211_wext_giwauth,
  	[IW_IOCTL_IDX(SIOCSIWENCODEEXT)]= (iw_handler) cfg80211_wext_siwencodeext,

  	[IW_IOCTL_IDX(SIOCSIWPMKSA)]	= (iw_handler) cfg80211_wext_siwpmksa,

  };
  
  const struct iw_handler_def cfg80211_wext_handler = {
  	.num_standard		= ARRAY_SIZE(cfg80211_handlers),
  	.standard		= cfg80211_handlers,
  	.get_wireless_stats = cfg80211_wireless_stats,
  };