net/wireless/ibss.c - third_party/kernel - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 /*
  * Some IBSS support code for cfg80211.
  *
  * Copyright 2009	Johannes Berg <johannes@sipsolutions.net>
  */

 #include <linux/etherdevice.h>
 #include <linux/if_arp.h>
 #include <linux/slab.h>
 #include <linux/export.h>
 #include <net/cfg80211.h>
 #include "wext-compat.h"
 #include "nl80211.h"
 #include "rdev-ops.h"


 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
 			    struct ieee80211_channel *channel)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	struct cfg80211_bss *bss;
 #ifdef CONFIG_CFG80211_WEXT
 	union iwreq_data wrqu;
 #endif

 	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
 		return;

 	if (!wdev->ssid_len)
 		return;

 	bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, NULL, 0,
 			       IEEE80211_BSS_TYPE_IBSS, IEEE80211_PRIVACY_ANY);

 	if (WARN_ON(!bss))
 		return;

 	if (wdev->current_bss) {
 		cfg80211_unhold_bss(wdev->current_bss);
 		cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
 	}

 	cfg80211_hold_bss(bss_from_pub(bss));
 	wdev->current_bss = bss_from_pub(bss);

 	if (!(wdev->wiphy->flags & WIPHY_FLAG_HAS_STATIC_WEP))
 		cfg80211_upload_connect_keys(wdev);

 	nl80211_send_ibss_bssid(wiphy_to_rdev(wdev->wiphy), dev, bssid,
 				GFP_KERNEL);
 #ifdef CONFIG_CFG80211_WEXT
 	memset(&wrqu, 0, sizeof(wrqu));
 	memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
 	wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 #endif
 }

 void cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
 			  struct ieee80211_channel *channel, gfp_t gfp)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 	struct cfg80211_event *ev;
 	unsigned long flags;

 	trace_cfg80211_ibss_joined(dev, bssid, channel);

 	if (WARN_ON(!channel))
 		return;

 	ev = kzalloc(sizeof(*ev), gfp);
 	if (!ev)
 		return;

 	ev->type = EVENT_IBSS_JOINED;
 	memcpy(ev->ij.bssid, bssid, ETH_ALEN);
 	ev->ij.channel = channel;

 	spin_lock_irqsave(&wdev->event_lock, flags);
 	list_add_tail(&ev->list, &wdev->event_list);
 	spin_unlock_irqrestore(&wdev->event_lock, flags);
 	queue_work(cfg80211_wq, &rdev->event_work);
 }
 EXPORT_SYMBOL(cfg80211_ibss_joined);

 int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
 			 struct net_device *dev,
 			 struct cfg80211_ibss_params *params,
 			 struct cfg80211_cached_keys *connkeys)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	int err;

 	ASSERT_RTNL();
 	ASSERT_WDEV_LOCK(wdev);

 	if (wdev->ssid_len)
 		return -EALREADY;

 	if (!params->basic_rates) {
 		/*
 		* If no rates were explicitly configured,
 		* use the mandatory rate set for 11b or
 		* 11a for maximum compatibility.
 		*/
 		struct ieee80211_supported_band *sband;
 		enum nl80211_band band;
 		u32 flag;
 		int j;

 		band = params->chandef.chan->band;
 		if (band == NL80211_BAND_5GHZ ||
 		    band == NL80211_BAND_6GHZ)
 			flag = IEEE80211_RATE_MANDATORY_A;
 		else
 			flag = IEEE80211_RATE_MANDATORY_B;

 		sband = rdev->wiphy.bands[band];
 		for (j = 0; j < sband->n_bitrates; j++) {
 			if (sband->bitrates[j].flags & flag)
 				params->basic_rates |= BIT(j);
 		}
 	}

 	if (WARN_ON(connkeys && connkeys->def < 0))
 		return -EINVAL;

 	if (WARN_ON(wdev->connect_keys))
 		kfree_sensitive(wdev->connect_keys);
 	wdev->connect_keys = connkeys;

 	wdev->ibss_fixed = params->channel_fixed;
 	wdev->ibss_dfs_possible = params->userspace_handles_dfs;
 	wdev->chandef = params->chandef;
 	if (connkeys) {
 		params->wep_keys = connkeys->params;
 		params->wep_tx_key = connkeys->def;
 	}

 #ifdef CONFIG_CFG80211_WEXT
 	wdev->wext.ibss.chandef = params->chandef;
 #endif
 	err = rdev_join_ibss(rdev, dev, params);
 	if (err) {
 		wdev->connect_keys = NULL;
 		return err;
 	}

 	memcpy(wdev->ssid, params->ssid, params->ssid_len);
 	wdev->ssid_len = params->ssid_len;

 	return 0;
 }

 static void __cfg80211_clear_ibss(struct net_device *dev, bool nowext)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 	int i;

 	ASSERT_WDEV_LOCK(wdev);

 	kfree_sensitive(wdev->connect_keys);
 	wdev->connect_keys = NULL;

 	rdev_set_qos_map(rdev, dev, NULL);

 	/*
 	 * Delete all the keys ... pairwise keys can't really
 	 * exist any more anyway, but default keys might.
 	 */
 	if (rdev->ops->del_key)
 		for (i = 0; i < 6; i++)
 			rdev_del_key(rdev, dev, i, false, NULL);

 	if (wdev->current_bss) {
 		cfg80211_unhold_bss(wdev->current_bss);
 		cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
 	}

 	wdev->current_bss = NULL;
 	wdev->ssid_len = 0;
 	memset(&wdev->chandef, 0, sizeof(wdev->chandef));
 #ifdef CONFIG_CFG80211_WEXT
 	if (!nowext)
 		wdev->wext.ibss.ssid_len = 0;
 #endif
 	cfg80211_sched_dfs_chan_update(rdev);
 }

 void cfg80211_clear_ibss(struct net_device *dev, bool nowext)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;

 	wdev_lock(wdev);
 	__cfg80211_clear_ibss(dev, nowext);
 	wdev_unlock(wdev);
 }

 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
 			  struct net_device *dev, bool nowext)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	int err;

 	ASSERT_WDEV_LOCK(wdev);

 	if (!wdev->ssid_len)
 		return -ENOLINK;

 	err = rdev_leave_ibss(rdev, dev);

 	if (err)
 		return err;

 	wdev->conn_owner_nlportid = 0;
 	__cfg80211_clear_ibss(dev, nowext);

 	return 0;
 }

 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
 			struct net_device *dev, bool nowext)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	int err;

 	wdev_lock(wdev);
 	err = __cfg80211_leave_ibss(rdev, dev, nowext);
 	wdev_unlock(wdev);

 	return err;
 }

 #ifdef CONFIG_CFG80211_WEXT
 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
 			    struct wireless_dev *wdev)
 {
 	struct cfg80211_cached_keys *ck = NULL;
 	enum nl80211_band band;
 	int i, err;

 	ASSERT_WDEV_LOCK(wdev);

 	if (!wdev->wext.ibss.beacon_interval)
 		wdev->wext.ibss.beacon_interval = 100;

 	/* try to find an IBSS channel if none requested ... */
 	if (!wdev->wext.ibss.chandef.chan) {
 		struct ieee80211_channel *new_chan = NULL;

 		for (band = 0; band < NUM_NL80211_BANDS; band++) {
 			struct ieee80211_supported_band *sband;
 			struct ieee80211_channel *chan;

 			sband = rdev->wiphy.bands[band];
 			if (!sband)
 				continue;

 			for (i = 0; i < sband->n_channels; i++) {
 				chan = &sband->channels[i];
 				if (chan->flags & IEEE80211_CHAN_NO_IR)
 					continue;
 				if (chan->flags & IEEE80211_CHAN_DISABLED)
 					continue;
 				new_chan = chan;
 				break;
 			}

 			if (new_chan)
 				break;
 		}

 		if (!new_chan)
 			return -EINVAL;

 		cfg80211_chandef_create(&wdev->wext.ibss.chandef, new_chan,
 					NL80211_CHAN_NO_HT);
 	}

 	/* don't join -- SSID is not there */
 	if (!wdev->wext.ibss.ssid_len)
 		return 0;

 	if (!netif_running(wdev->netdev))
 		return 0;

 	if (wdev->wext.keys)
 		wdev->wext.keys->def = wdev->wext.default_key;

 	wdev->wext.ibss.privacy = wdev->wext.default_key != -1;

 	if (wdev->wext.keys && wdev->wext.keys->def != -1) {
 		ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL);
 		if (!ck)
 			return -ENOMEM;
 		for (i = 0; i < CFG80211_MAX_WEP_KEYS; i++)
 			ck->params[i].key = ck->data[i];
 	}
 	err = __cfg80211_join_ibss(rdev, wdev->netdev,
 				   &wdev->wext.ibss, ck);
 	if (err)
 		kfree(ck);

 	return err;
 }

 int cfg80211_ibss_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 ieee80211_channel *chan = NULL;
 	int err, freq;

 	/* call only for ibss! */
 	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
 		return -EINVAL;

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

 	freq = cfg80211_wext_freq(wextfreq);
 	if (freq < 0)
 		return freq;

 	if (freq) {
 		chan = ieee80211_get_channel(wdev->wiphy, freq);
 		if (!chan)
 			return -EINVAL;
 		if (chan->flags & IEEE80211_CHAN_NO_IR ||
 		    chan->flags & IEEE80211_CHAN_DISABLED)
 			return -EINVAL;
 	}

 	if (wdev->wext.ibss.chandef.chan == chan)
 		return 0;

 	wdev_lock(wdev);
 	err = 0;
 	if (wdev->ssid_len)
 		err = __cfg80211_leave_ibss(rdev, dev, true);
 	wdev_unlock(wdev);

 	if (err)
 		return err;

 	if (chan) {
 		cfg80211_chandef_create(&wdev->wext.ibss.chandef, chan,
 					NL80211_CHAN_NO_HT);
 		wdev->wext.ibss.channel_fixed = true;
 	} else {
 		/* cfg80211_ibss_wext_join will pick one if needed */
 		wdev->wext.ibss.channel_fixed = false;
 	}

 	wdev_lock(wdev);
 	err = cfg80211_ibss_wext_join(rdev, wdev);
 	wdev_unlock(wdev);

 	return err;
 }

 int cfg80211_ibss_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 ieee80211_channel *chan = NULL;

 	/* call only for ibss! */
 	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
 		return -EINVAL;

 	wdev_lock(wdev);
 	if (wdev->current_bss)
 		chan = wdev->current_bss->pub.channel;
 	else if (wdev->wext.ibss.chandef.chan)
 		chan = wdev->wext.ibss.chandef.chan;
 	wdev_unlock(wdev);

 	if (chan) {
 		freq->m = chan->center_freq;
 		freq->e = 6;
 		return 0;
 	}

 	/* no channel if not joining */
 	return -EINVAL;
 }

 int cfg80211_ibss_wext_siwessid(struct net_device *dev,
 				struct iw_request_info *info,
 				struct iw_point *data, char *ssid)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 	size_t len = data->length;
 	int err;

 	/* call only for ibss! */
 	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
 		return -EINVAL;

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

 	wdev_lock(wdev);
 	err = 0;
 	if (wdev->ssid_len)
 		err = __cfg80211_leave_ibss(rdev, dev, true);
 	wdev_unlock(wdev);

 	if (err)
 		return err;

 	/* iwconfig uses nul termination in SSID.. */
 	if (len > 0 && ssid[len - 1] == '\0')
 		len--;

 	memcpy(wdev->ssid, ssid, len);
 	wdev->wext.ibss.ssid = wdev->ssid;
 	wdev->wext.ibss.ssid_len = len;

 	wdev_lock(wdev);
 	err = cfg80211_ibss_wext_join(rdev, wdev);
 	wdev_unlock(wdev);

 	return err;
 }

 int cfg80211_ibss_wext_giwessid(struct net_device *dev,
 				struct iw_request_info *info,
 				struct iw_point *data, char *ssid)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;

 	/* call only for ibss! */
 	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
 		return -EINVAL;

 	data->flags = 0;

 	wdev_lock(wdev);
 	if (wdev->ssid_len) {
 		data->flags = 1;
 		data->length = wdev->ssid_len;
 		memcpy(ssid, wdev->ssid, data->length);
 	} else if (wdev->wext.ibss.ssid && wdev->wext.ibss.ssid_len) {
 		data->flags = 1;
 		data->length = wdev->wext.ibss.ssid_len;
 		memcpy(ssid, wdev->wext.ibss.ssid, data->length);
 	}
 	wdev_unlock(wdev);

 	return 0;
 }

 int cfg80211_ibss_wext_siwap(struct net_device *dev,
 			     struct iw_request_info *info,
 			     struct sockaddr *ap_addr, char *extra)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 	u8 *bssid = ap_addr->sa_data;
 	int err;

 	/* call only for ibss! */
 	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
 		return -EINVAL;

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

 	if (ap_addr->sa_family != ARPHRD_ETHER)
 		return -EINVAL;

 	/* automatic mode */
 	if (is_zero_ether_addr(bssid) || is_broadcast_ether_addr(bssid))
 		bssid = NULL;

 	if (bssid && !is_valid_ether_addr(bssid))
 		return -EINVAL;

 	/* both automatic */
 	if (!bssid && !wdev->wext.ibss.bssid)
 		return 0;

 	/* fixed already - and no change */
 	if (wdev->wext.ibss.bssid && bssid &&
 	    ether_addr_equal(bssid, wdev->wext.ibss.bssid))
 		return 0;

 	wdev_lock(wdev);
 	err = 0;
 	if (wdev->ssid_len)
 		err = __cfg80211_leave_ibss(rdev, dev, true);
 	wdev_unlock(wdev);

 	if (err)
 		return err;

 	if (bssid) {
 		memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
 		wdev->wext.ibss.bssid = wdev->wext.bssid;
 	} else
 		wdev->wext.ibss.bssid = NULL;

 	wdev_lock(wdev);
 	err = cfg80211_ibss_wext_join(rdev, wdev);
 	wdev_unlock(wdev);

 	return err;
 }

 int cfg80211_ibss_wext_giwap(struct net_device *dev,
 			     struct iw_request_info *info,
 			     struct sockaddr *ap_addr, char *extra)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;

 	/* call only for ibss! */
 	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
 		return -EINVAL;

 	ap_addr->sa_family = ARPHRD_ETHER;

 	wdev_lock(wdev);
 	if (wdev->current_bss)
 		memcpy(ap_addr->sa_data, wdev->current_bss->pub.bssid, ETH_ALEN);
 	else if (wdev->wext.ibss.bssid)
 		memcpy(ap_addr->sa_data, wdev->wext.ibss.bssid, ETH_ALEN);
 	else
 		eth_zero_addr(ap_addr->sa_data);

 	wdev_unlock(wdev);

 	return 0;
 }
 #endif
	// SPDX-License-Identifier: GPL-2.0
	/*
	* Some IBSS support code for cfg80211.
	*
	* Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
	*/

	#include <linux/etherdevice.h>
	#include <linux/if_arp.h>
	#include <linux/slab.h>
	#include <linux/export.h>
	#include <net/cfg80211.h>
	#include "wext-compat.h"
	#include "nl80211.h"
	#include "rdev-ops.h"


	void __cfg80211_ibss_joined(struct net_device dev, const u8 bssid,
	struct ieee80211_channel *channel)
	{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	struct cfg80211_bss *bss;
	#ifdef CONFIG_CFG80211_WEXT
	union iwreq_data wrqu;
	#endif

	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	return;

	if (!wdev->ssid_len)
	return;

	bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, NULL, 0,
	IEEE80211_BSS_TYPE_IBSS, IEEE80211_PRIVACY_ANY);

	if (WARN_ON(!bss))
	return;

	if (wdev->current_bss) {
	cfg80211_unhold_bss(wdev->current_bss);
	cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
	}

	cfg80211_hold_bss(bss_from_pub(bss));
	wdev->current_bss = bss_from_pub(bss);

	if (!(wdev->wiphy->flags & WIPHY_FLAG_HAS_STATIC_WEP))
	cfg80211_upload_connect_keys(wdev);

	nl80211_send_ibss_bssid(wiphy_to_rdev(wdev->wiphy), dev, bssid,
	GFP_KERNEL);
	#ifdef CONFIG_CFG80211_WEXT
	memset(&wrqu, 0, sizeof(wrqu));
	memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
	wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
	#endif
	}

	void cfg80211_ibss_joined(struct net_device dev, const u8 bssid,
	struct ieee80211_channel *channel, gfp_t gfp)
	{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
	struct cfg80211_event *ev;
	unsigned long flags;

	trace_cfg80211_ibss_joined(dev, bssid, channel);

	if (WARN_ON(!channel))
	return;

	ev = kzalloc(sizeof(*ev), gfp);
	if (!ev)
	return;

	ev->type = EVENT_IBSS_JOINED;
	memcpy(ev->ij.bssid, bssid, ETH_ALEN);
	ev->ij.channel = channel;

	spin_lock_irqsave(&wdev->event_lock, flags);
	list_add_tail(&ev->list, &wdev->event_list);
	spin_unlock_irqrestore(&wdev->event_lock, flags);
	queue_work(cfg80211_wq, &rdev->event_work);
	}
	EXPORT_SYMBOL(cfg80211_ibss_joined);

	int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
	struct net_device *dev,
	struct cfg80211_ibss_params *params,
	struct cfg80211_cached_keys *connkeys)
	{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	int err;

	ASSERT_RTNL();
	ASSERT_WDEV_LOCK(wdev);

	if (wdev->ssid_len)
	return -EALREADY;

	if (!params->basic_rates) {
	/*
	* If no rates were explicitly configured,
	* use the mandatory rate set for 11b or
	* 11a for maximum compatibility.
	*/
	struct ieee80211_supported_band *sband;
	enum nl80211_band band;
	u32 flag;
	int j;

	band = params->chandef.chan->band;
	if (band == NL80211_BAND_5GHZ \|\|
	band == NL80211_BAND_6GHZ)
	flag = IEEE80211_RATE_MANDATORY_A;
	else
	flag = IEEE80211_RATE_MANDATORY_B;

	sband = rdev->wiphy.bands[band];
	for (j = 0; j < sband->n_bitrates; j++) {
	if (sband->bitrates[j].flags & flag)
	params->basic_rates \|= BIT(j);
	}
	}

	if (WARN_ON(connkeys && connkeys->def < 0))
	return -EINVAL;

	if (WARN_ON(wdev->connect_keys))
	kfree_sensitive(wdev->connect_keys);
	wdev->connect_keys = connkeys;

	wdev->ibss_fixed = params->channel_fixed;
	wdev->ibss_dfs_possible = params->userspace_handles_dfs;
	wdev->chandef = params->chandef;
	if (connkeys) {
	params->wep_keys = connkeys->params;
	params->wep_tx_key = connkeys->def;
	}

	#ifdef CONFIG_CFG80211_WEXT
	wdev->wext.ibss.chandef = params->chandef;
	#endif
	err = rdev_join_ibss(rdev, dev, params);
	if (err) {
	wdev->connect_keys = NULL;
	return err;
	}

	memcpy(wdev->ssid, params->ssid, params->ssid_len);
	wdev->ssid_len = params->ssid_len;

	return 0;
	}

	static void __cfg80211_clear_ibss(struct net_device *dev, bool nowext)
	{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
	int i;

	ASSERT_WDEV_LOCK(wdev);

	kfree_sensitive(wdev->connect_keys);
	wdev->connect_keys = NULL;

	rdev_set_qos_map(rdev, dev, NULL);

	/*
	* Delete all the keys ... pairwise keys can't really
	* exist any more anyway, but default keys might.
	*/
	if (rdev->ops->del_key)
	for (i = 0; i < 6; i++)
	rdev_del_key(rdev, dev, i, false, NULL);

	if (wdev->current_bss) {
	cfg80211_unhold_bss(wdev->current_bss);
	cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
	}

	wdev->current_bss = NULL;
	wdev->ssid_len = 0;
	memset(&wdev->chandef, 0, sizeof(wdev->chandef));
	#ifdef CONFIG_CFG80211_WEXT
	if (!nowext)
	wdev->wext.ibss.ssid_len = 0;
	#endif
	cfg80211_sched_dfs_chan_update(rdev);
	}

	void cfg80211_clear_ibss(struct net_device *dev, bool nowext)
	{
	struct wireless_dev *wdev = dev->ieee80211_ptr;

	wdev_lock(wdev);
	__cfg80211_clear_ibss(dev, nowext);
	wdev_unlock(wdev);
	}

	int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
	struct net_device *dev, bool nowext)
	{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	int err;

	ASSERT_WDEV_LOCK(wdev);

	if (!wdev->ssid_len)
	return -ENOLINK;

	err = rdev_leave_ibss(rdev, dev);

	if (err)
	return err;

	wdev->conn_owner_nlportid = 0;
	__cfg80211_clear_ibss(dev, nowext);

	return 0;
	}

	int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
	struct net_device *dev, bool nowext)
	{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	int err;

	wdev_lock(wdev);
	err = __cfg80211_leave_ibss(rdev, dev, nowext);
	wdev_unlock(wdev);

	return err;
	}

	#ifdef CONFIG_CFG80211_WEXT
	int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
	struct wireless_dev *wdev)
	{
	struct cfg80211_cached_keys *ck = NULL;
	enum nl80211_band band;
	int i, err;

	ASSERT_WDEV_LOCK(wdev);

	if (!wdev->wext.ibss.beacon_interval)
	wdev->wext.ibss.beacon_interval = 100;

	/* try to find an IBSS channel if none requested ... */
	if (!wdev->wext.ibss.chandef.chan) {
	struct ieee80211_channel *new_chan = NULL;

	for (band = 0; band < NUM_NL80211_BANDS; band++) {
	struct ieee80211_supported_band *sband;
	struct ieee80211_channel *chan;

	sband = rdev->wiphy.bands[band];
	if (!sband)
	continue;

	for (i = 0; i < sband->n_channels; i++) {
	chan = &sband->channels[i];
	if (chan->flags & IEEE80211_CHAN_NO_IR)
	continue;
	if (chan->flags & IEEE80211_CHAN_DISABLED)
	continue;
	new_chan = chan;
	break;
	}

	if (new_chan)
	break;
	}

	if (!new_chan)
	return -EINVAL;

	cfg80211_chandef_create(&wdev->wext.ibss.chandef, new_chan,
	NL80211_CHAN_NO_HT);
	}

	/* don't join -- SSID is not there */
	if (!wdev->wext.ibss.ssid_len)
	return 0;

	if (!netif_running(wdev->netdev))
	return 0;

	if (wdev->wext.keys)
	wdev->wext.keys->def = wdev->wext.default_key;

	wdev->wext.ibss.privacy = wdev->wext.default_key != -1;

	if (wdev->wext.keys && wdev->wext.keys->def != -1) {
	ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL);
	if (!ck)
	return -ENOMEM;
	for (i = 0; i < CFG80211_MAX_WEP_KEYS; i++)
	ck->params[i].key = ck->data[i];
	}
	err = __cfg80211_join_ibss(rdev, wdev->netdev,
	&wdev->wext.ibss, ck);
	if (err)
	kfree(ck);

	return err;
	}

	int cfg80211_ibss_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 ieee80211_channel *chan = NULL;
	int err, freq;

	/* call only for ibss! */
	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	return -EINVAL;

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

	freq = cfg80211_wext_freq(wextfreq);
	if (freq < 0)
	return freq;

	if (freq) {
	chan = ieee80211_get_channel(wdev->wiphy, freq);
	if (!chan)
	return -EINVAL;
	if (chan->flags & IEEE80211_CHAN_NO_IR \|\|
	chan->flags & IEEE80211_CHAN_DISABLED)
	return -EINVAL;
	}

	if (wdev->wext.ibss.chandef.chan == chan)
	return 0;

	wdev_lock(wdev);
	err = 0;
	if (wdev->ssid_len)
	err = __cfg80211_leave_ibss(rdev, dev, true);
	wdev_unlock(wdev);

	if (err)
	return err;

	if (chan) {
	cfg80211_chandef_create(&wdev->wext.ibss.chandef, chan,
	NL80211_CHAN_NO_HT);
	wdev->wext.ibss.channel_fixed = true;
	} else {
	/* cfg80211_ibss_wext_join will pick one if needed */
	wdev->wext.ibss.channel_fixed = false;
	}

	wdev_lock(wdev);
	err = cfg80211_ibss_wext_join(rdev, wdev);
	wdev_unlock(wdev);

	return err;
	}

	int cfg80211_ibss_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 ieee80211_channel *chan = NULL;

	/* call only for ibss! */
	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	return -EINVAL;

	wdev_lock(wdev);
	if (wdev->current_bss)
	chan = wdev->current_bss->pub.channel;
	else if (wdev->wext.ibss.chandef.chan)
	chan = wdev->wext.ibss.chandef.chan;
	wdev_unlock(wdev);

	if (chan) {
	freq->m = chan->center_freq;
	freq->e = 6;
	return 0;
	}

	/* no channel if not joining */
	return -EINVAL;
	}

	int cfg80211_ibss_wext_siwessid(struct net_device *dev,
	struct iw_request_info *info,
	struct iw_point data, char ssid)
	{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
	size_t len = data->length;
	int err;

	/* call only for ibss! */
	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	return -EINVAL;

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

	wdev_lock(wdev);
	err = 0;
	if (wdev->ssid_len)
	err = __cfg80211_leave_ibss(rdev, dev, true);
	wdev_unlock(wdev);

	if (err)
	return err;

	/* iwconfig uses nul termination in SSID.. */
	if (len > 0 && ssid[len - 1] == '\0')
	len--;

	memcpy(wdev->ssid, ssid, len);
	wdev->wext.ibss.ssid = wdev->ssid;
	wdev->wext.ibss.ssid_len = len;

	wdev_lock(wdev);
	err = cfg80211_ibss_wext_join(rdev, wdev);
	wdev_unlock(wdev);

	return err;
	}

	int cfg80211_ibss_wext_giwessid(struct net_device *dev,
	struct iw_request_info *info,
	struct iw_point data, char ssid)
	{
	struct wireless_dev *wdev = dev->ieee80211_ptr;

	/* call only for ibss! */
	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	return -EINVAL;

	data->flags = 0;

	wdev_lock(wdev);
	if (wdev->ssid_len) {
	data->flags = 1;
	data->length = wdev->ssid_len;
	memcpy(ssid, wdev->ssid, data->length);
	} else if (wdev->wext.ibss.ssid && wdev->wext.ibss.ssid_len) {
	data->flags = 1;
	data->length = wdev->wext.ibss.ssid_len;
	memcpy(ssid, wdev->wext.ibss.ssid, data->length);
	}
	wdev_unlock(wdev);

	return 0;
	}

	int cfg80211_ibss_wext_siwap(struct net_device *dev,
	struct iw_request_info *info,
	struct sockaddr ap_addr, char extra)
	{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
	u8 *bssid = ap_addr->sa_data;
	int err;

	/* call only for ibss! */
	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	return -EINVAL;

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

	if (ap_addr->sa_family != ARPHRD_ETHER)
	return -EINVAL;

	/* automatic mode */
	if (is_zero_ether_addr(bssid) \|\| is_broadcast_ether_addr(bssid))
	bssid = NULL;

	if (bssid && !is_valid_ether_addr(bssid))
	return -EINVAL;

	/* both automatic */
	if (!bssid && !wdev->wext.ibss.bssid)
	return 0;

	/* fixed already - and no change */
	if (wdev->wext.ibss.bssid && bssid &&
	ether_addr_equal(bssid, wdev->wext.ibss.bssid))
	return 0;

	wdev_lock(wdev);
	err = 0;
	if (wdev->ssid_len)
	err = __cfg80211_leave_ibss(rdev, dev, true);
	wdev_unlock(wdev);

	if (err)
	return err;

	if (bssid) {
	memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
	wdev->wext.ibss.bssid = wdev->wext.bssid;
	} else
	wdev->wext.ibss.bssid = NULL;

	wdev_lock(wdev);
	err = cfg80211_ibss_wext_join(rdev, wdev);
	wdev_unlock(wdev);

	return err;
	}

	int cfg80211_ibss_wext_giwap(struct net_device *dev,
	struct iw_request_info *info,
	struct sockaddr ap_addr, char extra)
	{
	struct wireless_dev *wdev = dev->ieee80211_ptr;

	/* call only for ibss! */
	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	return -EINVAL;

	ap_addr->sa_family = ARPHRD_ETHER;

	wdev_lock(wdev);
	if (wdev->current_bss)
	memcpy(ap_addr->sa_data, wdev->current_bss->pub.bssid, ETH_ALEN);
	else if (wdev->wext.ibss.bssid)
	memcpy(ap_addr->sa_data, wdev->wext.ibss.bssid, ETH_ALEN);
	else
	eth_zero_addr(ap_addr->sa_data);

	wdev_unlock(wdev);

	return 0;
	}
	#endif