[mirror_ubuntu-bionic-kernel.git] / net / wireless / ibss.c

/*
 * Some IBSS support code for cfg80211.
 *
 * Copyright 2009	Johannes Berg <johannes@sipsolutions.net>
 */

#include <linux/etherdevice.h>
#include <linux/if_arp.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
Commit	Line	Data
04a773ad JB	1	/*
	2	* Some IBSS support code for cfg80211.
	3	*
	4	* Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
	5	*/
	6
	7	#include <linux/etherdevice.h>
	8	#include <linux/if_arp.h>
	9	#include <net/cfg80211.h>
0e82ffe3	10	#include "wext-compat.h"
04a773ad JB	11	#include "nl80211.h"
	12
	13
667503dd	14	void __cfg80211_ibss_joined(struct net_device dev, const u8 bssid)
04a773ad JB	15	{
	16	struct wireless_dev *wdev = dev->ieee80211_ptr;
	17	struct cfg80211_bss *bss;
3d23e349	18	#ifdef CONFIG_CFG80211_WEXT
04a773ad JB	19	union iwreq_data wrqu;
	20	#endif
	21
	22	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	23	return;
	24
f7969969	25	if (!wdev->ssid_len)
04a773ad JB	26	return;
04a773ad JB	27
04a773ad JB	28	bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
	29	wdev->ssid, wdev->ssid_len,
	30	WLAN_CAPABILITY_IBSS, WLAN_CAPABILITY_IBSS);
	31
	32	if (WARN_ON(!bss))
	33	return;
	34
	35	if (wdev->current_bss) {
	36	cfg80211_unhold_bss(wdev->current_bss);
19957bb3	37	cfg80211_put_bss(&wdev->current_bss->pub);
04a773ad JB	38	}
04a773ad JB	39
19957bb3 JB	40	cfg80211_hold_bss(bss_from_pub(bss));
19957bb3 JB	41	wdev->current_bss = bss_from_pub(bss);
04a773ad	42
fffd0934 JB	43	cfg80211_upload_connect_keys(wdev);
fffd0934 JB	44
667503dd JB	45	nl80211_send_ibss_bssid(wiphy_to_dev(wdev->wiphy), dev, bssid,
667503dd JB	46	GFP_KERNEL);
3d23e349	47	#ifdef CONFIG_CFG80211_WEXT
04a773ad JB	48	memset(&wrqu, 0, sizeof(wrqu));
	49	memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
	50	wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
	51	#endif
	52	}
667503dd JB	53
	54	void cfg80211_ibss_joined(struct net_device dev, const u8 bssid, gfp_t gfp)
	55	{
	56	struct wireless_dev *wdev = dev->ieee80211_ptr;
	57	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
	58	struct cfg80211_event *ev;
	59	unsigned long flags;
	60
f7969969 JB	61	CFG80211_DEV_WARN_ON(!wdev->ssid_len);
f7969969 JB	62
667503dd JB	63	ev = kzalloc(sizeof(*ev), gfp);
	64	if (!ev)
	65	return;
	66
	67	ev->type = EVENT_IBSS_JOINED;
	68	memcpy(ev->cr.bssid, bssid, ETH_ALEN);
	69
	70	spin_lock_irqsave(&wdev->event_lock, flags);
	71	list_add_tail(&ev->list, &wdev->event_list);
	72	spin_unlock_irqrestore(&wdev->event_lock, flags);
e60d7443	73	queue_work(cfg80211_wq, &rdev->event_work);
667503dd	74	}
04a773ad JB	75	EXPORT_SYMBOL(cfg80211_ibss_joined);
04a773ad JB	76
667503dd JB	77	int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
667503dd JB	78	struct net_device *dev,
fffd0934 JB	79	struct cfg80211_ibss_params *params,
fffd0934 JB	80	struct cfg80211_cached_keys *connkeys)
04a773ad JB	81	{
04a773ad JB	82	struct wireless_dev *wdev = dev->ieee80211_ptr;
59bbb6f7	83	struct ieee80211_channel *chan;
04a773ad JB	84	int err;
04a773ad JB	85
667503dd JB	86	ASSERT_WDEV_LOCK(wdev);
667503dd JB	87
59bbb6f7 JB	88	chan = rdev_fixed_channel(rdev, wdev);
	89	if (chan && chan != params->channel)
	90	return -EBUSY;
	91
04a773ad JB	92	if (wdev->ssid_len)
	93	return -EALREADY;
	94
fffd0934 JB	95	if (WARN_ON(wdev->connect_keys))
	96	kfree(wdev->connect_keys);
	97	wdev->connect_keys = connkeys;
	98
3d23e349	99	#ifdef CONFIG_CFG80211_WEXT
cbe8fa9c	100	wdev->wext.ibss.channel = params->channel;
04a773ad JB	101	#endif
04a773ad JB	102	err = rdev->ops->join_ibss(&rdev->wiphy, dev, params);
fffd0934 JB	103	if (err) {
fffd0934 JB	104	wdev->connect_keys = NULL;
04a773ad	105	return err;
fffd0934	106	}
04a773ad JB	107
	108	memcpy(wdev->ssid, params->ssid, params->ssid_len);
	109	wdev->ssid_len = params->ssid_len;
	110
	111	return 0;
	112	}
	113
667503dd JB	114	int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
667503dd JB	115	struct net_device *dev,
fffd0934 JB	116	struct cfg80211_ibss_params *params,
fffd0934 JB	117	struct cfg80211_cached_keys *connkeys)
667503dd JB	118	{
	119	struct wireless_dev *wdev = dev->ieee80211_ptr;
	120	int err;
	121
59bbb6f7	122	mutex_lock(&rdev->devlist_mtx);
667503dd	123	wdev_lock(wdev);
fffd0934	124	err = __cfg80211_join_ibss(rdev, dev, params, connkeys);
667503dd	125	wdev_unlock(wdev);
59bbb6f7	126	mutex_unlock(&rdev->devlist_mtx);
667503dd JB	127
	128	return err;
	129	}
	130
	131	static void __cfg80211_clear_ibss(struct net_device *dev, bool nowext)
04a773ad JB	132	{
04a773ad JB	133	struct wireless_dev *wdev = dev->ieee80211_ptr;
fffd0934 JB	134	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
fffd0934 JB	135	int i;
04a773ad	136
667503dd JB	137	ASSERT_WDEV_LOCK(wdev);
667503dd JB	138
fffd0934 JB	139	kfree(wdev->connect_keys);
	140	wdev->connect_keys = NULL;
	141
	142	/*
	143	* Delete all the keys ... pairwise keys can't really
	144	* exist any more anyway, but default keys might.
	145	*/
	146	if (rdev->ops->del_key)
	147	for (i = 0; i < 6; i++)
	148	rdev->ops->del_key(wdev->wiphy, dev, i, NULL);
	149
04a773ad JB	150	if (wdev->current_bss) {
04a773ad JB	151	cfg80211_unhold_bss(wdev->current_bss);
19957bb3	152	cfg80211_put_bss(&wdev->current_bss->pub);
04a773ad JB	153	}
	154
	155	wdev->current_bss = NULL;
	156	wdev->ssid_len = 0;
3d23e349	157	#ifdef CONFIG_CFG80211_WEXT
9d308429	158	if (!nowext)
cbe8fa9c	159	wdev->wext.ibss.ssid_len = 0;
9d308429	160	#endif
04a773ad JB	161	}
04a773ad JB	162
667503dd JB	163	void cfg80211_clear_ibss(struct net_device *dev, bool nowext)
	164	{
	165	struct wireless_dev *wdev = dev->ieee80211_ptr;
	166
	167	wdev_lock(wdev);
	168	__cfg80211_clear_ibss(dev, nowext);
	169	wdev_unlock(wdev);
	170	}
	171
98d3a7ca JB	172	int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
98d3a7ca JB	173	struct net_device *dev, bool nowext)
04a773ad	174	{
78485475	175	struct wireless_dev *wdev = dev->ieee80211_ptr;
04a773ad JB	176	int err;
04a773ad JB	177
667503dd JB	178	ASSERT_WDEV_LOCK(wdev);
667503dd JB	179
78485475 JB	180	if (!wdev->ssid_len)
	181	return -ENOLINK;
	182
04a773ad JB	183	err = rdev->ops->leave_ibss(&rdev->wiphy, dev);
	184
	185	if (err)
	186	return err;
	187
667503dd	188	__cfg80211_clear_ibss(dev, nowext);
04a773ad JB	189
	190	return 0;
	191	}
	192
667503dd JB	193	int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
	194	struct net_device *dev, bool nowext)
	195	{
	196	struct wireless_dev *wdev = dev->ieee80211_ptr;
	197	int err;
	198
	199	wdev_lock(wdev);
	200	err = __cfg80211_leave_ibss(rdev, dev, nowext);
	201	wdev_unlock(wdev);
	202
	203	return err;
	204	}
	205
3d23e349	206	#ifdef CONFIG_CFG80211_WEXT
fffd0934 JB	207	int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
fffd0934 JB	208	struct wireless_dev *wdev)
04a773ad	209	{
fffd0934	210	struct cfg80211_cached_keys *ck = NULL;
04a773ad	211	enum ieee80211_band band;
fffd0934 JB	212	int i, err;
	213
	214	ASSERT_WDEV_LOCK(wdev);
04a773ad	215
cbe8fa9c JB	216	if (!wdev->wext.ibss.beacon_interval)
cbe8fa9c JB	217	wdev->wext.ibss.beacon_interval = 100;
8e30bc55	218
04a773ad	219	/* try to find an IBSS channel if none requested ... */
cbe8fa9c	220	if (!wdev->wext.ibss.channel) {
04a773ad JB	221	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
	222	struct ieee80211_supported_band *sband;
	223	struct ieee80211_channel *chan;
	224
	225	sband = rdev->wiphy.bands[band];
	226	if (!sband)
	227	continue;
	228
	229	for (i = 0; i < sband->n_channels; i++) {
	230	chan = &sband->channels[i];
	231	if (chan->flags & IEEE80211_CHAN_NO_IBSS)
	232	continue;
	233	if (chan->flags & IEEE80211_CHAN_DISABLED)
	234	continue;
cbe8fa9c	235	wdev->wext.ibss.channel = chan;
04a773ad JB	236	break;
	237	}
	238
cbe8fa9c	239	if (wdev->wext.ibss.channel)
04a773ad JB	240	break;
	241	}
	242
cbe8fa9c	243	if (!wdev->wext.ibss.channel)
04a773ad JB	244	return -EINVAL;
	245	}
	246
	247	/* don't join -- SSID is not there */
cbe8fa9c	248	if (!wdev->wext.ibss.ssid_len)
04a773ad JB	249	return 0;
	250
	251	if (!netif_running(wdev->netdev))
	252	return 0;
	253
fffd0934 JB	254	if (wdev->wext.keys)
	255	wdev->wext.keys->def = wdev->wext.default_key;
	256
	257	wdev->wext.ibss.privacy = wdev->wext.default_key != -1;
	258
	259	if (wdev->wext.keys) {
	260	ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL);
	261	if (!ck)
	262	return -ENOMEM;
	263	for (i = 0; i < 6; i++)
	264	ck->params[i].key = ck->data[i];
	265	}
	266	err = __cfg80211_join_ibss(rdev, wdev->netdev,
	267	&wdev->wext.ibss, ck);
	268	if (err)
	269	kfree(ck);
	270
	271	return err;
04a773ad JB	272	}
	273
	274	int cfg80211_ibss_wext_siwfreq(struct net_device *dev,
	275	struct iw_request_info *info,
59bbb6f7	276	struct iw_freq wextfreq, char extra)
04a773ad JB	277	{
04a773ad JB	278	struct wireless_dev *wdev = dev->ieee80211_ptr;
59bbb6f7 JB	279	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
	280	struct ieee80211_channel *chan = NULL;
	281	int err, freq;
04a773ad JB	282
	283	/* call only for ibss! */
	284	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	285	return -EINVAL;
	286
59bbb6f7	287	if (!rdev->ops->join_ibss)
04a773ad JB	288	return -EOPNOTSUPP;
04a773ad JB	289
59bbb6f7 JB	290	freq = cfg80211_wext_freq(wdev->wiphy, wextfreq);
	291	if (freq < 0)
	292	return freq;
04a773ad	293
59bbb6f7 JB	294	if (freq) {
	295	chan = ieee80211_get_channel(wdev->wiphy, freq);
	296	if (!chan)
	297	return -EINVAL;
	298	if (chan->flags & IEEE80211_CHAN_NO_IBSS \|\|
	299	chan->flags & IEEE80211_CHAN_DISABLED)
	300	return -EINVAL;
	301	}
04a773ad	302
cbe8fa9c	303	if (wdev->wext.ibss.channel == chan)
04a773ad JB	304	return 0;
04a773ad JB	305
667503dd JB	306	wdev_lock(wdev);
	307	err = 0;
	308	if (wdev->ssid_len)
59bbb6f7	309	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	310	wdev_unlock(wdev);
	311
	312	if (err)
	313	return err;
04a773ad JB	314
04a773ad JB	315	if (chan) {
cbe8fa9c JB	316	wdev->wext.ibss.channel = chan;
cbe8fa9c JB	317	wdev->wext.ibss.channel_fixed = true;
04a773ad JB	318	} else {
04a773ad JB	319	/* cfg80211_ibss_wext_join will pick one if needed */
cbe8fa9c	320	wdev->wext.ibss.channel_fixed = false;
04a773ad JB	321	}
04a773ad JB	322
59bbb6f7	323	mutex_lock(&rdev->devlist_mtx);
fffd0934	324	wdev_lock(wdev);
59bbb6f7	325	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934	326	wdev_unlock(wdev);
59bbb6f7	327	mutex_unlock(&rdev->devlist_mtx);
fffd0934 JB	328
fffd0934 JB	329	return err;
04a773ad	330	}
04a773ad JB	331
	332	int cfg80211_ibss_wext_giwfreq(struct net_device *dev,
	333	struct iw_request_info *info,
	334	struct iw_freq freq, char extra)
	335	{
	336	struct wireless_dev *wdev = dev->ieee80211_ptr;
	337	struct ieee80211_channel *chan = NULL;
	338
	339	/* call only for ibss! */
	340	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	341	return -EINVAL;
	342
667503dd	343	wdev_lock(wdev);
04a773ad	344	if (wdev->current_bss)
19957bb3	345	chan = wdev->current_bss->pub.channel;
cbe8fa9c JB	346	else if (wdev->wext.ibss.channel)
cbe8fa9c JB	347	chan = wdev->wext.ibss.channel;
667503dd	348	wdev_unlock(wdev);
04a773ad JB	349
	350	if (chan) {
	351	freq->m = chan->center_freq;
	352	freq->e = 6;
	353	return 0;
	354	}
	355
	356	/* no channel if not joining */
	357	return -EINVAL;
	358	}
04a773ad JB	359
	360	int cfg80211_ibss_wext_siwessid(struct net_device *dev,
	361	struct iw_request_info *info,
	362	struct iw_point data, char ssid)
	363	{
	364	struct wireless_dev *wdev = dev->ieee80211_ptr;
59bbb6f7	365	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
04a773ad JB	366	size_t len = data->length;
	367	int err;
	368
	369	/* call only for ibss! */
	370	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	371	return -EINVAL;
	372
59bbb6f7	373	if (!rdev->ops->join_ibss)
04a773ad JB	374	return -EOPNOTSUPP;
04a773ad JB	375
667503dd JB	376	wdev_lock(wdev);
	377	err = 0;
	378	if (wdev->ssid_len)
59bbb6f7	379	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	380	wdev_unlock(wdev);
	381
	382	if (err)
	383	return err;
04a773ad JB	384
	385	/* iwconfig uses nul termination in SSID.. */
	386	if (len > 0 && ssid[len - 1] == '\0')
	387	len--;
	388
cbe8fa9c JB	389	wdev->wext.ibss.ssid = wdev->ssid;
	390	memcpy(wdev->wext.ibss.ssid, ssid, len);
	391	wdev->wext.ibss.ssid_len = len;
04a773ad	392
59bbb6f7	393	mutex_lock(&rdev->devlist_mtx);
fffd0934	394	wdev_lock(wdev);
59bbb6f7	395	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934	396	wdev_unlock(wdev);
59bbb6f7	397	mutex_unlock(&rdev->devlist_mtx);
fffd0934 JB	398
fffd0934 JB	399	return err;
04a773ad	400	}
04a773ad JB	401
	402	int cfg80211_ibss_wext_giwessid(struct net_device *dev,
	403	struct iw_request_info *info,
	404	struct iw_point data, char ssid)
	405	{
	406	struct wireless_dev *wdev = dev->ieee80211_ptr;
	407
	408	/* call only for ibss! */
	409	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	410	return -EINVAL;
	411
	412	data->flags = 0;
	413
667503dd	414	wdev_lock(wdev);
04a773ad JB	415	if (wdev->ssid_len) {
	416	data->flags = 1;
	417	data->length = wdev->ssid_len;
	418	memcpy(ssid, wdev->ssid, data->length);
cbe8fa9c	419	} else if (wdev->wext.ibss.ssid && wdev->wext.ibss.ssid_len) {
04a773ad	420	data->flags = 1;
cbe8fa9c JB	421	data->length = wdev->wext.ibss.ssid_len;
cbe8fa9c JB	422	memcpy(ssid, wdev->wext.ibss.ssid, data->length);
04a773ad	423	}
667503dd	424	wdev_unlock(wdev);
04a773ad JB	425
	426	return 0;
	427	}
04a773ad JB	428
	429	int cfg80211_ibss_wext_siwap(struct net_device *dev,
	430	struct iw_request_info *info,
	431	struct sockaddr ap_addr, char extra)
	432	{
	433	struct wireless_dev *wdev = dev->ieee80211_ptr;
59bbb6f7	434	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
04a773ad JB	435	u8 *bssid = ap_addr->sa_data;
	436	int err;
	437
	438	/* call only for ibss! */
	439	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	440	return -EINVAL;
	441
59bbb6f7	442	if (!rdev->ops->join_ibss)
04a773ad JB	443	return -EOPNOTSUPP;
	444
	445	if (ap_addr->sa_family != ARPHRD_ETHER)
	446	return -EINVAL;
	447
	448	/* automatic mode */
	449	if (is_zero_ether_addr(bssid) \|\| is_broadcast_ether_addr(bssid))
	450	bssid = NULL;
	451
	452	/* both automatic */
cbe8fa9c	453	if (!bssid && !wdev->wext.ibss.bssid)
04a773ad JB	454	return 0;
	455
	456	/* fixed already - and no change */
cbe8fa9c JB	457	if (wdev->wext.ibss.bssid && bssid &&
cbe8fa9c JB	458	compare_ether_addr(bssid, wdev->wext.ibss.bssid) == 0)
04a773ad JB	459	return 0;
04a773ad JB	460
667503dd JB	461	wdev_lock(wdev);
	462	err = 0;
	463	if (wdev->ssid_len)
59bbb6f7	464	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	465	wdev_unlock(wdev);
	466
	467	if (err)
	468	return err;
04a773ad JB	469
04a773ad JB	470	if (bssid) {
cbe8fa9c JB	471	memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
cbe8fa9c JB	472	wdev->wext.ibss.bssid = wdev->wext.bssid;
04a773ad	473	} else
cbe8fa9c	474	wdev->wext.ibss.bssid = NULL;
04a773ad	475
59bbb6f7	476	mutex_lock(&rdev->devlist_mtx);
fffd0934	477	wdev_lock(wdev);
59bbb6f7	478	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934	479	wdev_unlock(wdev);
59bbb6f7	480	mutex_unlock(&rdev->devlist_mtx);
fffd0934 JB	481
fffd0934 JB	482	return err;
04a773ad	483	}
04a773ad JB	484
	485	int cfg80211_ibss_wext_giwap(struct net_device *dev,
	486	struct iw_request_info *info,
	487	struct sockaddr ap_addr, char extra)
	488	{
	489	struct wireless_dev *wdev = dev->ieee80211_ptr;
	490
	491	/* call only for ibss! */
	492	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	493	return -EINVAL;
	494
	495	ap_addr->sa_family = ARPHRD_ETHER;
	496
667503dd	497	wdev_lock(wdev);
7ebbe6bd	498	if (wdev->current_bss)
19957bb3	499	memcpy(ap_addr->sa_data, wdev->current_bss->pub.bssid, ETH_ALEN);
80e5b06a	500	else if (wdev->wext.ibss.bssid)
cbe8fa9c	501	memcpy(ap_addr->sa_data, wdev->wext.ibss.bssid, ETH_ALEN);
80e5b06a ZY	502	else
	503	memset(ap_addr->sa_data, 0, ETH_ALEN);
	504
667503dd JB	505	wdev_unlock(wdev);
667503dd JB	506
04a773ad JB	507	return 0;
04a773ad JB	508	}
04a773ad	509	#endif