[mirror_ubuntu-artful-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 <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
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>
5a0e3ad6	9	#include <linux/slab.h>
04a773ad	10	#include <net/cfg80211.h>
0e82ffe3	11	#include "wext-compat.h"
04a773ad JB	12	#include "nl80211.h"
	13
	14
667503dd	15	void __cfg80211_ibss_joined(struct net_device dev, const u8 bssid)
04a773ad JB	16	{
	17	struct wireless_dev *wdev = dev->ieee80211_ptr;
	18	struct cfg80211_bss *bss;
3d23e349	19	#ifdef CONFIG_CFG80211_WEXT
04a773ad JB	20	union iwreq_data wrqu;
	21	#endif
	22
	23	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	24	return;
	25
f7969969	26	if (!wdev->ssid_len)
04a773ad JB	27	return;
04a773ad JB	28
04a773ad JB	29	bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
	30	wdev->ssid, wdev->ssid_len,
	31	WLAN_CAPABILITY_IBSS, WLAN_CAPABILITY_IBSS);
	32
	33	if (WARN_ON(!bss))
	34	return;
	35
	36	if (wdev->current_bss) {
	37	cfg80211_unhold_bss(wdev->current_bss);
19957bb3	38	cfg80211_put_bss(&wdev->current_bss->pub);
04a773ad JB	39	}
04a773ad JB	40
19957bb3 JB	41	cfg80211_hold_bss(bss_from_pub(bss));
19957bb3 JB	42	wdev->current_bss = bss_from_pub(bss);
04a773ad	43
fffd0934 JB	44	cfg80211_upload_connect_keys(wdev);
fffd0934 JB	45
667503dd JB	46	nl80211_send_ibss_bssid(wiphy_to_dev(wdev->wiphy), dev, bssid,
667503dd JB	47	GFP_KERNEL);
3d23e349	48	#ifdef CONFIG_CFG80211_WEXT
04a773ad JB	49	memset(&wrqu, 0, sizeof(wrqu));
	50	memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
	51	wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
	52	#endif
	53	}
667503dd JB	54
	55	void cfg80211_ibss_joined(struct net_device dev, const u8 bssid, gfp_t gfp)
	56	{
	57	struct wireless_dev *wdev = dev->ieee80211_ptr;
	58	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
	59	struct cfg80211_event *ev;
	60	unsigned long flags;
	61
f7969969 JB	62	CFG80211_DEV_WARN_ON(!wdev->ssid_len);
f7969969 JB	63
667503dd JB	64	ev = kzalloc(sizeof(*ev), gfp);
	65	if (!ev)
	66	return;
	67
	68	ev->type = EVENT_IBSS_JOINED;
	69	memcpy(ev->cr.bssid, bssid, ETH_ALEN);
	70
	71	spin_lock_irqsave(&wdev->event_lock, flags);
	72	list_add_tail(&ev->list, &wdev->event_list);
	73	spin_unlock_irqrestore(&wdev->event_lock, flags);
e60d7443	74	queue_work(cfg80211_wq, &rdev->event_work);
667503dd	75	}
04a773ad JB	76	EXPORT_SYMBOL(cfg80211_ibss_joined);
04a773ad JB	77
667503dd JB	78	int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
667503dd JB	79	struct net_device *dev,
fffd0934 JB	80	struct cfg80211_ibss_params *params,
fffd0934 JB	81	struct cfg80211_cached_keys *connkeys)
04a773ad JB	82	{
04a773ad JB	83	struct wireless_dev *wdev = dev->ieee80211_ptr;
59bbb6f7	84	struct ieee80211_channel *chan;
04a773ad JB	85	int err;
04a773ad JB	86
667503dd JB	87	ASSERT_WDEV_LOCK(wdev);
667503dd JB	88
59bbb6f7 JB	89	chan = rdev_fixed_channel(rdev, wdev);
	90	if (chan && chan != params->channel)
	91	return -EBUSY;
	92
04a773ad JB	93	if (wdev->ssid_len)
	94	return -EALREADY;
	95
fffd0934 JB	96	if (WARN_ON(wdev->connect_keys))
	97	kfree(wdev->connect_keys);
	98	wdev->connect_keys = connkeys;
	99
3d23e349	100	#ifdef CONFIG_CFG80211_WEXT
cbe8fa9c	101	wdev->wext.ibss.channel = params->channel;
04a773ad JB	102	#endif
04a773ad JB	103	err = rdev->ops->join_ibss(&rdev->wiphy, dev, params);
fffd0934 JB	104	if (err) {
fffd0934 JB	105	wdev->connect_keys = NULL;
04a773ad	106	return err;
fffd0934	107	}
04a773ad JB	108
	109	memcpy(wdev->ssid, params->ssid, params->ssid_len);
	110	wdev->ssid_len = params->ssid_len;
	111
	112	return 0;
	113	}
	114
667503dd JB	115	int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
667503dd JB	116	struct net_device *dev,
fffd0934 JB	117	struct cfg80211_ibss_params *params,
fffd0934 JB	118	struct cfg80211_cached_keys *connkeys)
667503dd JB	119	{
	120	struct wireless_dev *wdev = dev->ieee80211_ptr;
	121	int err;
	122
59bbb6f7	123	mutex_lock(&rdev->devlist_mtx);
667503dd	124	wdev_lock(wdev);
fffd0934	125	err = __cfg80211_join_ibss(rdev, dev, params, connkeys);
667503dd	126	wdev_unlock(wdev);
59bbb6f7	127	mutex_unlock(&rdev->devlist_mtx);
667503dd JB	128
	129	return err;
	130	}
	131
	132	static void __cfg80211_clear_ibss(struct net_device *dev, bool nowext)
04a773ad JB	133	{
04a773ad JB	134	struct wireless_dev *wdev = dev->ieee80211_ptr;
fffd0934 JB	135	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
fffd0934 JB	136	int i;
04a773ad	137
667503dd JB	138	ASSERT_WDEV_LOCK(wdev);
667503dd JB	139
fffd0934 JB	140	kfree(wdev->connect_keys);
	141	wdev->connect_keys = NULL;
	142
	143	/*
	144	* Delete all the keys ... pairwise keys can't really
	145	* exist any more anyway, but default keys might.
	146	*/
	147	if (rdev->ops->del_key)
	148	for (i = 0; i < 6; i++)
	149	rdev->ops->del_key(wdev->wiphy, dev, i, NULL);
	150
04a773ad JB	151	if (wdev->current_bss) {
04a773ad JB	152	cfg80211_unhold_bss(wdev->current_bss);
19957bb3	153	cfg80211_put_bss(&wdev->current_bss->pub);
04a773ad JB	154	}
	155
	156	wdev->current_bss = NULL;
	157	wdev->ssid_len = 0;
3d23e349	158	#ifdef CONFIG_CFG80211_WEXT
9d308429	159	if (!nowext)
cbe8fa9c	160	wdev->wext.ibss.ssid_len = 0;
9d308429	161	#endif
04a773ad JB	162	}
04a773ad JB	163
667503dd JB	164	void cfg80211_clear_ibss(struct net_device *dev, bool nowext)
	165	{
	166	struct wireless_dev *wdev = dev->ieee80211_ptr;
	167
	168	wdev_lock(wdev);
	169	__cfg80211_clear_ibss(dev, nowext);
	170	wdev_unlock(wdev);
	171	}
	172
98d3a7ca JB	173	int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
98d3a7ca JB	174	struct net_device *dev, bool nowext)
04a773ad	175	{
78485475	176	struct wireless_dev *wdev = dev->ieee80211_ptr;
04a773ad JB	177	int err;
04a773ad JB	178
667503dd JB	179	ASSERT_WDEV_LOCK(wdev);
667503dd JB	180
78485475 JB	181	if (!wdev->ssid_len)
	182	return -ENOLINK;
	183
04a773ad JB	184	err = rdev->ops->leave_ibss(&rdev->wiphy, dev);
	185
	186	if (err)
	187	return err;
	188
667503dd	189	__cfg80211_clear_ibss(dev, nowext);
04a773ad JB	190
	191	return 0;
	192	}
	193
667503dd JB	194	int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
	195	struct net_device *dev, bool nowext)
	196	{
	197	struct wireless_dev *wdev = dev->ieee80211_ptr;
	198	int err;
	199
	200	wdev_lock(wdev);
	201	err = __cfg80211_leave_ibss(rdev, dev, nowext);
	202	wdev_unlock(wdev);
	203
	204	return err;
	205	}
	206
3d23e349	207	#ifdef CONFIG_CFG80211_WEXT
fffd0934 JB	208	int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
fffd0934 JB	209	struct wireless_dev *wdev)
04a773ad	210	{
fffd0934	211	struct cfg80211_cached_keys *ck = NULL;
04a773ad	212	enum ieee80211_band band;
fffd0934 JB	213	int i, err;
	214
	215	ASSERT_WDEV_LOCK(wdev);
04a773ad	216
cbe8fa9c JB	217	if (!wdev->wext.ibss.beacon_interval)
cbe8fa9c JB	218	wdev->wext.ibss.beacon_interval = 100;
8e30bc55	219
04a773ad	220	/* try to find an IBSS channel if none requested ... */
cbe8fa9c	221	if (!wdev->wext.ibss.channel) {
04a773ad JB	222	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
	223	struct ieee80211_supported_band *sband;
	224	struct ieee80211_channel *chan;
	225
	226	sband = rdev->wiphy.bands[band];
	227	if (!sband)
	228	continue;
	229
	230	for (i = 0; i < sband->n_channels; i++) {
	231	chan = &sband->channels[i];
	232	if (chan->flags & IEEE80211_CHAN_NO_IBSS)
	233	continue;
	234	if (chan->flags & IEEE80211_CHAN_DISABLED)
	235	continue;
cbe8fa9c	236	wdev->wext.ibss.channel = chan;
04a773ad JB	237	break;
	238	}
	239
cbe8fa9c	240	if (wdev->wext.ibss.channel)
04a773ad JB	241	break;
	242	}
	243
cbe8fa9c	244	if (!wdev->wext.ibss.channel)
04a773ad JB	245	return -EINVAL;
	246	}
	247
	248	/* don't join -- SSID is not there */
cbe8fa9c	249	if (!wdev->wext.ibss.ssid_len)
04a773ad JB	250	return 0;
	251
	252	if (!netif_running(wdev->netdev))
	253	return 0;
	254
fffd0934 JB	255	if (wdev->wext.keys)
	256	wdev->wext.keys->def = wdev->wext.default_key;
	257
	258	wdev->wext.ibss.privacy = wdev->wext.default_key != -1;
	259
	260	if (wdev->wext.keys) {
	261	ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL);
	262	if (!ck)
	263	return -ENOMEM;
	264	for (i = 0; i < 6; i++)
	265	ck->params[i].key = ck->data[i];
	266	}
	267	err = __cfg80211_join_ibss(rdev, wdev->netdev,
	268	&wdev->wext.ibss, ck);
	269	if (err)
	270	kfree(ck);
	271
	272	return err;
04a773ad JB	273	}
	274
	275	int cfg80211_ibss_wext_siwfreq(struct net_device *dev,
	276	struct iw_request_info *info,
59bbb6f7	277	struct iw_freq wextfreq, char extra)
04a773ad JB	278	{
04a773ad JB	279	struct wireless_dev *wdev = dev->ieee80211_ptr;
59bbb6f7 JB	280	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
	281	struct ieee80211_channel *chan = NULL;
	282	int err, freq;
04a773ad JB	283
	284	/* call only for ibss! */
	285	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	286	return -EINVAL;
	287
59bbb6f7	288	if (!rdev->ops->join_ibss)
04a773ad JB	289	return -EOPNOTSUPP;
04a773ad JB	290
59bbb6f7 JB	291	freq = cfg80211_wext_freq(wdev->wiphy, wextfreq);
	292	if (freq < 0)
	293	return freq;
04a773ad	294
59bbb6f7 JB	295	if (freq) {
	296	chan = ieee80211_get_channel(wdev->wiphy, freq);
	297	if (!chan)
	298	return -EINVAL;
	299	if (chan->flags & IEEE80211_CHAN_NO_IBSS \|\|
	300	chan->flags & IEEE80211_CHAN_DISABLED)
	301	return -EINVAL;
	302	}
04a773ad	303
cbe8fa9c	304	if (wdev->wext.ibss.channel == chan)
04a773ad JB	305	return 0;
04a773ad JB	306
667503dd JB	307	wdev_lock(wdev);
	308	err = 0;
	309	if (wdev->ssid_len)
59bbb6f7	310	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	311	wdev_unlock(wdev);
	312
	313	if (err)
	314	return err;
04a773ad JB	315
04a773ad JB	316	if (chan) {
cbe8fa9c JB	317	wdev->wext.ibss.channel = chan;
cbe8fa9c JB	318	wdev->wext.ibss.channel_fixed = true;
04a773ad JB	319	} else {
04a773ad JB	320	/* cfg80211_ibss_wext_join will pick one if needed */
cbe8fa9c	321	wdev->wext.ibss.channel_fixed = false;
04a773ad JB	322	}
04a773ad JB	323
59bbb6f7	324	mutex_lock(&rdev->devlist_mtx);
fffd0934	325	wdev_lock(wdev);
59bbb6f7	326	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934	327	wdev_unlock(wdev);
59bbb6f7	328	mutex_unlock(&rdev->devlist_mtx);
fffd0934 JB	329
fffd0934 JB	330	return err;
04a773ad	331	}
04a773ad JB	332
	333	int cfg80211_ibss_wext_giwfreq(struct net_device *dev,
	334	struct iw_request_info *info,
	335	struct iw_freq freq, char extra)
	336	{
	337	struct wireless_dev *wdev = dev->ieee80211_ptr;
	338	struct ieee80211_channel *chan = NULL;
	339
	340	/* call only for ibss! */
	341	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	342	return -EINVAL;
	343
667503dd	344	wdev_lock(wdev);
04a773ad	345	if (wdev->current_bss)
19957bb3	346	chan = wdev->current_bss->pub.channel;
cbe8fa9c JB	347	else if (wdev->wext.ibss.channel)
cbe8fa9c JB	348	chan = wdev->wext.ibss.channel;
667503dd	349	wdev_unlock(wdev);
04a773ad JB	350
	351	if (chan) {
	352	freq->m = chan->center_freq;
	353	freq->e = 6;
	354	return 0;
	355	}
	356
	357	/* no channel if not joining */
	358	return -EINVAL;
	359	}
04a773ad JB	360
	361	int cfg80211_ibss_wext_siwessid(struct net_device *dev,
	362	struct iw_request_info *info,
	363	struct iw_point data, char ssid)
	364	{
	365	struct wireless_dev *wdev = dev->ieee80211_ptr;
59bbb6f7	366	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
04a773ad JB	367	size_t len = data->length;
	368	int err;
	369
	370	/* call only for ibss! */
	371	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	372	return -EINVAL;
	373
59bbb6f7	374	if (!rdev->ops->join_ibss)
04a773ad JB	375	return -EOPNOTSUPP;
04a773ad JB	376
667503dd JB	377	wdev_lock(wdev);
	378	err = 0;
	379	if (wdev->ssid_len)
59bbb6f7	380	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	381	wdev_unlock(wdev);
	382
	383	if (err)
	384	return err;
04a773ad JB	385
	386	/* iwconfig uses nul termination in SSID.. */
	387	if (len > 0 && ssid[len - 1] == '\0')
	388	len--;
	389
cbe8fa9c JB	390	wdev->wext.ibss.ssid = wdev->ssid;
	391	memcpy(wdev->wext.ibss.ssid, ssid, len);
	392	wdev->wext.ibss.ssid_len = len;
04a773ad	393
59bbb6f7	394	mutex_lock(&rdev->devlist_mtx);
fffd0934	395	wdev_lock(wdev);
59bbb6f7	396	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934	397	wdev_unlock(wdev);
59bbb6f7	398	mutex_unlock(&rdev->devlist_mtx);
fffd0934 JB	399
fffd0934 JB	400	return err;
04a773ad	401	}
04a773ad JB	402
	403	int cfg80211_ibss_wext_giwessid(struct net_device *dev,
	404	struct iw_request_info *info,
	405	struct iw_point data, char ssid)
	406	{
	407	struct wireless_dev *wdev = dev->ieee80211_ptr;
	408
	409	/* call only for ibss! */
	410	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	411	return -EINVAL;
	412
	413	data->flags = 0;
	414
667503dd	415	wdev_lock(wdev);
04a773ad JB	416	if (wdev->ssid_len) {
	417	data->flags = 1;
	418	data->length = wdev->ssid_len;
	419	memcpy(ssid, wdev->ssid, data->length);
cbe8fa9c	420	} else if (wdev->wext.ibss.ssid && wdev->wext.ibss.ssid_len) {
04a773ad	421	data->flags = 1;
cbe8fa9c JB	422	data->length = wdev->wext.ibss.ssid_len;
cbe8fa9c JB	423	memcpy(ssid, wdev->wext.ibss.ssid, data->length);
04a773ad	424	}
667503dd	425	wdev_unlock(wdev);
04a773ad JB	426
	427	return 0;
	428	}
04a773ad JB	429
	430	int cfg80211_ibss_wext_siwap(struct net_device *dev,
	431	struct iw_request_info *info,
	432	struct sockaddr ap_addr, char extra)
	433	{
	434	struct wireless_dev *wdev = dev->ieee80211_ptr;
59bbb6f7	435	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
04a773ad JB	436	u8 *bssid = ap_addr->sa_data;
	437	int err;
	438
	439	/* call only for ibss! */
	440	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	441	return -EINVAL;
	442
59bbb6f7	443	if (!rdev->ops->join_ibss)
04a773ad JB	444	return -EOPNOTSUPP;
	445
	446	if (ap_addr->sa_family != ARPHRD_ETHER)
	447	return -EINVAL;
	448
	449	/* automatic mode */
	450	if (is_zero_ether_addr(bssid) \|\| is_broadcast_ether_addr(bssid))
	451	bssid = NULL;
	452
	453	/* both automatic */
cbe8fa9c	454	if (!bssid && !wdev->wext.ibss.bssid)
04a773ad JB	455	return 0;
	456
	457	/* fixed already - and no change */
cbe8fa9c JB	458	if (wdev->wext.ibss.bssid && bssid &&
cbe8fa9c JB	459	compare_ether_addr(bssid, wdev->wext.ibss.bssid) == 0)
04a773ad JB	460	return 0;
04a773ad JB	461
667503dd JB	462	wdev_lock(wdev);
	463	err = 0;
	464	if (wdev->ssid_len)
59bbb6f7	465	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	466	wdev_unlock(wdev);
	467
	468	if (err)
	469	return err;
04a773ad JB	470
04a773ad JB	471	if (bssid) {
cbe8fa9c JB	472	memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
cbe8fa9c JB	473	wdev->wext.ibss.bssid = wdev->wext.bssid;
04a773ad	474	} else
cbe8fa9c	475	wdev->wext.ibss.bssid = NULL;
04a773ad	476
59bbb6f7	477	mutex_lock(&rdev->devlist_mtx);
fffd0934	478	wdev_lock(wdev);
59bbb6f7	479	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934	480	wdev_unlock(wdev);
59bbb6f7	481	mutex_unlock(&rdev->devlist_mtx);
fffd0934 JB	482
fffd0934 JB	483	return err;
04a773ad	484	}
04a773ad JB	485
	486	int cfg80211_ibss_wext_giwap(struct net_device *dev,
	487	struct iw_request_info *info,
	488	struct sockaddr ap_addr, char extra)
	489	{
	490	struct wireless_dev *wdev = dev->ieee80211_ptr;
	491
	492	/* call only for ibss! */
	493	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	494	return -EINVAL;
	495
	496	ap_addr->sa_family = ARPHRD_ETHER;
	497
667503dd	498	wdev_lock(wdev);
7ebbe6bd	499	if (wdev->current_bss)
19957bb3	500	memcpy(ap_addr->sa_data, wdev->current_bss->pub.bssid, ETH_ALEN);
80e5b06a	501	else if (wdev->wext.ibss.bssid)
cbe8fa9c	502	memcpy(ap_addr->sa_data, wdev->wext.ibss.bssid, ETH_ALEN);
80e5b06a ZY	503	else
	504	memset(ap_addr->sa_data, 0, ETH_ALEN);
	505
667503dd JB	506	wdev_unlock(wdev);
667503dd JB	507
04a773ad JB	508	return 0;
04a773ad JB	509	}
04a773ad	510	#endif