[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 <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;
	int err;

	ASSERT_WDEV_LOCK(wdev);

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