net/wireless/ibss.c - kernel/msm-4.9 - Gitiles

 /*
  * 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 <net/cfg80211.h>
 #include "wext-compat.h"
 #include "nl80211.h"


 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid)
 {
 	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, NULL, bssid,
 			       wdev->ssid, wdev->ssid_len,
 			       WLAN_CAPABILITY_IBSS, WLAN_CAPABILITY_IBSS);

 	if (WARN_ON(!bss))
 		return;

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

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

 	cfg80211_upload_connect_keys(wdev);

 	nl80211_send_ibss_bssid(wiphy_to_dev(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, gfp_t gfp)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 	struct cfg80211_event *ev;
 	unsigned long flags;

 	CFG80211_DEV_WARN_ON(!wdev->ssid_len);

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

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

 	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;
 	struct ieee80211_channel *chan;
 	int err;

 	ASSERT_WDEV_LOCK(wdev);

 	chan = rdev_fixed_channel(rdev, wdev);
 	if (chan && chan != params->channel)
 		return -EBUSY;

 	if (wdev->ssid_len)
 		return -EALREADY;

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

 #ifdef CONFIG_CFG80211_WEXT
 	wdev->wext.ibss.channel = params->channel;
 #endif
 	err = rdev->ops->join_ibss(&rdev->wiphy, 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;
 }

 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;

 	mutex_lock(&rdev->devlist_mtx);
 	wdev_lock(wdev);
 	err = __cfg80211_join_ibss(rdev, dev, params, connkeys);
 	wdev_unlock(wdev);
 	mutex_unlock(&rdev->devlist_mtx);

 	return err;
 }

 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_dev(wdev->wiphy);
 	int i;

 	ASSERT_WDEV_LOCK(wdev);

 	kfree(wdev->connect_keys);
 	wdev->connect_keys = 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->ops->del_key(wdev->wiphy, dev, i, NULL);

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

 	wdev->current_bss = NULL;
 	wdev->ssid_len = 0;
 #ifdef CONFIG_CFG80211_WEXT
 	if (!nowext)
 		wdev->wext.ibss.ssid_len = 0;
 #endif
 }

 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->ops->leave_ibss(&rdev->wiphy, dev);

 	if (err)
 		return err;

 	__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 ieee80211_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.channel) {
 		for (band = 0; band < IEEE80211_NUM_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_IBSS)
 					continue;
 				if (chan->flags & IEEE80211_CHAN_DISABLED)
 					continue;
 				wdev->wext.ibss.channel = chan;
 				break;
 			}

 			if (wdev->wext.ibss.channel)
 				break;
 		}

 		if (!wdev->wext.ibss.channel)
 			return -EINVAL;
 	}

 	/* 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) {
 		ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL);
 		if (!ck)
 			return -ENOMEM;
 		for (i = 0; i < 6; 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_dev(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(wdev->wiphy, 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_IBSS ||
 		    chan->flags & IEEE80211_CHAN_DISABLED)
 			return -EINVAL;
 	}

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

 	mutex_lock(&rdev->devlist_mtx);
 	wdev_lock(wdev);
 	err = cfg80211_ibss_wext_join(rdev, wdev);
 	wdev_unlock(wdev);
 	mutex_unlock(&rdev->devlist_mtx);

 	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.channel)
 		chan = wdev->wext.ibss.channel;
 	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_dev(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--;

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

 	mutex_lock(&rdev->devlist_mtx);
 	wdev_lock(wdev);
 	err = cfg80211_ibss_wext_join(rdev, wdev);
 	wdev_unlock(wdev);
 	mutex_unlock(&rdev->devlist_mtx);

 	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_dev(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;

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

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

 	mutex_lock(&rdev->devlist_mtx);
 	wdev_lock(wdev);
 	err = cfg80211_ibss_wext_join(rdev, wdev);
 	wdev_unlock(wdev);
 	mutex_unlock(&rdev->devlist_mtx);

 	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
 		memset(ap_addr->sa_data, 0, ETH_ALEN);

 	wdev_unlock(wdev);

 	return 0;
 }
 #endif
	/*
	* 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 <net/cfg80211.h>
	#include "wext-compat.h"
	#include "nl80211.h"


	void __cfg80211_ibss_joined(struct net_device dev, const u8 bssid)
	{
	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, NULL, bssid,
	wdev->ssid, wdev->ssid_len,
	WLAN_CAPABILITY_IBSS, WLAN_CAPABILITY_IBSS);

	if (WARN_ON(!bss))
	return;

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

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

	cfg80211_upload_connect_keys(wdev);

	nl80211_send_ibss_bssid(wiphy_to_dev(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, gfp_t gfp)
	{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
	struct cfg80211_event *ev;
	unsigned long flags;

	CFG80211_DEV_WARN_ON(!wdev->ssid_len);

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

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

	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;
	struct ieee80211_channel *chan;
	int err;

	ASSERT_WDEV_LOCK(wdev);

	chan = rdev_fixed_channel(rdev, wdev);
	if (chan && chan != params->channel)
	return -EBUSY;

	if (wdev->ssid_len)
	return -EALREADY;

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

	#ifdef CONFIG_CFG80211_WEXT
	wdev->wext.ibss.channel = params->channel;
	#endif
	err = rdev->ops->join_ibss(&rdev->wiphy, 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;
	}

	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;

	mutex_lock(&rdev->devlist_mtx);
	wdev_lock(wdev);
	err = __cfg80211_join_ibss(rdev, dev, params, connkeys);
	wdev_unlock(wdev);
	mutex_unlock(&rdev->devlist_mtx);

	return err;
	}

	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_dev(wdev->wiphy);
	int i;

	ASSERT_WDEV_LOCK(wdev);

	kfree(wdev->connect_keys);
	wdev->connect_keys = 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->ops->del_key(wdev->wiphy, dev, i, NULL);

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

	wdev->current_bss = NULL;
	wdev->ssid_len = 0;
	#ifdef CONFIG_CFG80211_WEXT
	if (!nowext)
	wdev->wext.ibss.ssid_len = 0;
	#endif
	}

	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->ops->leave_ibss(&rdev->wiphy, dev);

	if (err)
	return err;

	__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 ieee80211_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.channel) {
	for (band = 0; band < IEEE80211_NUM_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_IBSS)
	continue;
	if (chan->flags & IEEE80211_CHAN_DISABLED)
	continue;
	wdev->wext.ibss.channel = chan;
	break;
	}

	if (wdev->wext.ibss.channel)
	break;
	}

	if (!wdev->wext.ibss.channel)
	return -EINVAL;
	}

	/* 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) {
	ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL);
	if (!ck)
	return -ENOMEM;
	for (i = 0; i < 6; 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_dev(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(wdev->wiphy, 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_IBSS \|\|
	chan->flags & IEEE80211_CHAN_DISABLED)
	return -EINVAL;
	}

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

	mutex_lock(&rdev->devlist_mtx);
	wdev_lock(wdev);
	err = cfg80211_ibss_wext_join(rdev, wdev);
	wdev_unlock(wdev);
	mutex_unlock(&rdev->devlist_mtx);

	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.channel)
	chan = wdev->wext.ibss.channel;
	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_dev(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--;

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

	mutex_lock(&rdev->devlist_mtx);
	wdev_lock(wdev);
	err = cfg80211_ibss_wext_join(rdev, wdev);
	wdev_unlock(wdev);
	mutex_unlock(&rdev->devlist_mtx);

	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_dev(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;

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

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

	mutex_lock(&rdev->devlist_mtx);
	wdev_lock(wdev);
	err = cfg80211_ibss_wext_join(rdev, wdev);
	wdev_unlock(wdev);
	mutex_unlock(&rdev->devlist_mtx);

	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
	memset(ap_addr->sa_data, 0, ETH_ALEN);

	wdev_unlock(wdev);

	return 0;
	}
	#endif