[net-next-2.6.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;
	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.keys->defmgmt = wdev->wext.default_mgmt_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	{
	83	struct wireless_dev *wdev = dev->ieee80211_ptr;
	84	int err;
	85
667503dd JB	86	ASSERT_WDEV_LOCK(wdev);
667503dd JB	87
04a773ad JB	88	if (wdev->ssid_len)
	89	return -EALREADY;
	90
fffd0934 JB	91	if (WARN_ON(wdev->connect_keys))
	92	kfree(wdev->connect_keys);
	93	wdev->connect_keys = connkeys;
	94
3d23e349	95	#ifdef CONFIG_CFG80211_WEXT
cbe8fa9c	96	wdev->wext.ibss.channel = params->channel;
04a773ad JB	97	#endif
04a773ad JB	98	err = rdev->ops->join_ibss(&rdev->wiphy, dev, params);
fffd0934 JB	99	if (err) {
fffd0934 JB	100	wdev->connect_keys = NULL;
04a773ad	101	return err;
fffd0934	102	}
04a773ad JB	103
	104	memcpy(wdev->ssid, params->ssid, params->ssid_len);
	105	wdev->ssid_len = params->ssid_len;
	106
	107	return 0;
	108	}
	109
667503dd JB	110	int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
667503dd JB	111	struct net_device *dev,
fffd0934 JB	112	struct cfg80211_ibss_params *params,
fffd0934 JB	113	struct cfg80211_cached_keys *connkeys)
667503dd JB	114	{
	115	struct wireless_dev *wdev = dev->ieee80211_ptr;
	116	int err;
	117
59bbb6f7	118	mutex_lock(&rdev->devlist_mtx);
667503dd	119	wdev_lock(wdev);
fffd0934	120	err = __cfg80211_join_ibss(rdev, dev, params, connkeys);
667503dd	121	wdev_unlock(wdev);
59bbb6f7	122	mutex_unlock(&rdev->devlist_mtx);
667503dd JB	123
	124	return err;
	125	}
	126
	127	static void __cfg80211_clear_ibss(struct net_device *dev, bool nowext)
04a773ad JB	128	{
04a773ad JB	129	struct wireless_dev *wdev = dev->ieee80211_ptr;
fffd0934 JB	130	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
fffd0934 JB	131	int i;
04a773ad	132
667503dd JB	133	ASSERT_WDEV_LOCK(wdev);
667503dd JB	134
fffd0934 JB	135	kfree(wdev->connect_keys);
	136	wdev->connect_keys = NULL;
	137
	138	/*
	139	* Delete all the keys ... pairwise keys can't really
	140	* exist any more anyway, but default keys might.
	141	*/
	142	if (rdev->ops->del_key)
	143	for (i = 0; i < 6; i++)
	144	rdev->ops->del_key(wdev->wiphy, dev, i, NULL);
	145
04a773ad JB	146	if (wdev->current_bss) {
04a773ad JB	147	cfg80211_unhold_bss(wdev->current_bss);
19957bb3	148	cfg80211_put_bss(&wdev->current_bss->pub);
04a773ad JB	149	}
	150
	151	wdev->current_bss = NULL;
	152	wdev->ssid_len = 0;
3d23e349	153	#ifdef CONFIG_CFG80211_WEXT
9d308429	154	if (!nowext)
cbe8fa9c	155	wdev->wext.ibss.ssid_len = 0;
9d308429	156	#endif
04a773ad JB	157	}
04a773ad JB	158
667503dd JB	159	void cfg80211_clear_ibss(struct net_device *dev, bool nowext)
	160	{
	161	struct wireless_dev *wdev = dev->ieee80211_ptr;
	162
	163	wdev_lock(wdev);
	164	__cfg80211_clear_ibss(dev, nowext);
	165	wdev_unlock(wdev);
	166	}
	167
98d3a7ca JB	168	int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
98d3a7ca JB	169	struct net_device *dev, bool nowext)
04a773ad	170	{
78485475	171	struct wireless_dev *wdev = dev->ieee80211_ptr;
04a773ad JB	172	int err;
04a773ad JB	173
667503dd JB	174	ASSERT_WDEV_LOCK(wdev);
667503dd JB	175
78485475 JB	176	if (!wdev->ssid_len)
	177	return -ENOLINK;
	178
04a773ad JB	179	err = rdev->ops->leave_ibss(&rdev->wiphy, dev);
	180
	181	if (err)
	182	return err;
	183
667503dd	184	__cfg80211_clear_ibss(dev, nowext);
04a773ad JB	185
	186	return 0;
	187	}
	188
667503dd JB	189	int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
	190	struct net_device *dev, bool nowext)
	191	{
	192	struct wireless_dev *wdev = dev->ieee80211_ptr;
	193	int err;
	194
	195	wdev_lock(wdev);
	196	err = __cfg80211_leave_ibss(rdev, dev, nowext);
	197	wdev_unlock(wdev);
	198
	199	return err;
	200	}
	201
3d23e349	202	#ifdef CONFIG_CFG80211_WEXT
fffd0934 JB	203	int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
fffd0934 JB	204	struct wireless_dev *wdev)
04a773ad	205	{
fffd0934	206	struct cfg80211_cached_keys *ck = NULL;
04a773ad	207	enum ieee80211_band band;
fffd0934 JB	208	int i, err;
	209
	210	ASSERT_WDEV_LOCK(wdev);
04a773ad	211
cbe8fa9c JB	212	if (!wdev->wext.ibss.beacon_interval)
cbe8fa9c JB	213	wdev->wext.ibss.beacon_interval = 100;
8e30bc55	214
04a773ad	215	/* try to find an IBSS channel if none requested ... */
cbe8fa9c	216	if (!wdev->wext.ibss.channel) {
04a773ad JB	217	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
	218	struct ieee80211_supported_band *sband;
	219	struct ieee80211_channel *chan;
	220
	221	sband = rdev->wiphy.bands[band];
	222	if (!sband)
	223	continue;
	224
	225	for (i = 0; i < sband->n_channels; i++) {
	226	chan = &sband->channels[i];
	227	if (chan->flags & IEEE80211_CHAN_NO_IBSS)
	228	continue;
	229	if (chan->flags & IEEE80211_CHAN_DISABLED)
	230	continue;
cbe8fa9c	231	wdev->wext.ibss.channel = chan;
04a773ad JB	232	break;
	233	}
	234
cbe8fa9c	235	if (wdev->wext.ibss.channel)
04a773ad JB	236	break;
	237	}
	238
cbe8fa9c	239	if (!wdev->wext.ibss.channel)
04a773ad JB	240	return -EINVAL;
	241	}
	242
	243	/* don't join -- SSID is not there */
cbe8fa9c	244	if (!wdev->wext.ibss.ssid_len)
04a773ad JB	245	return 0;
	246
	247	if (!netif_running(wdev->netdev))
	248	return 0;
	249
3be61a38	250	if (wdev->wext.keys) {
fffd0934	251	wdev->wext.keys->def = wdev->wext.default_key;
3be61a38 JB	252	wdev->wext.keys->defmgmt = wdev->wext.default_mgmt_key;
3be61a38 JB	253	}
fffd0934 JB	254
	255	wdev->wext.ibss.privacy = wdev->wext.default_key != -1;
	256
	257	if (wdev->wext.keys) {
	258	ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL);
	259	if (!ck)
	260	return -ENOMEM;
	261	for (i = 0; i < 6; i++)
	262	ck->params[i].key = ck->data[i];
	263	}
	264	err = __cfg80211_join_ibss(rdev, wdev->netdev,
	265	&wdev->wext.ibss, ck);
	266	if (err)
	267	kfree(ck);
	268
	269	return err;
04a773ad JB	270	}
	271
	272	int cfg80211_ibss_wext_siwfreq(struct net_device *dev,
	273	struct iw_request_info *info,
59bbb6f7	274	struct iw_freq wextfreq, char extra)
04a773ad JB	275	{
04a773ad JB	276	struct wireless_dev *wdev = dev->ieee80211_ptr;
59bbb6f7 JB	277	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
	278	struct ieee80211_channel *chan = NULL;
	279	int err, freq;
04a773ad JB	280
	281	/* call only for ibss! */
	282	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	283	return -EINVAL;
	284
59bbb6f7	285	if (!rdev->ops->join_ibss)
04a773ad JB	286	return -EOPNOTSUPP;
04a773ad JB	287
59bbb6f7 JB	288	freq = cfg80211_wext_freq(wdev->wiphy, wextfreq);
	289	if (freq < 0)
	290	return freq;
04a773ad	291
59bbb6f7 JB	292	if (freq) {
	293	chan = ieee80211_get_channel(wdev->wiphy, freq);
	294	if (!chan)
	295	return -EINVAL;
	296	if (chan->flags & IEEE80211_CHAN_NO_IBSS \|\|
	297	chan->flags & IEEE80211_CHAN_DISABLED)
	298	return -EINVAL;
	299	}
04a773ad	300
cbe8fa9c	301	if (wdev->wext.ibss.channel == chan)
04a773ad JB	302	return 0;
04a773ad JB	303
667503dd JB	304	wdev_lock(wdev);
	305	err = 0;
	306	if (wdev->ssid_len)
59bbb6f7	307	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	308	wdev_unlock(wdev);
	309
	310	if (err)
	311	return err;
04a773ad JB	312
04a773ad JB	313	if (chan) {
cbe8fa9c JB	314	wdev->wext.ibss.channel = chan;
cbe8fa9c JB	315	wdev->wext.ibss.channel_fixed = true;
04a773ad JB	316	} else {
04a773ad JB	317	/* cfg80211_ibss_wext_join will pick one if needed */
cbe8fa9c	318	wdev->wext.ibss.channel_fixed = false;
04a773ad JB	319	}
04a773ad JB	320
59bbb6f7	321	mutex_lock(&rdev->devlist_mtx);
fffd0934	322	wdev_lock(wdev);
59bbb6f7	323	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934	324	wdev_unlock(wdev);
59bbb6f7	325	mutex_unlock(&rdev->devlist_mtx);
fffd0934 JB	326
fffd0934 JB	327	return err;
04a773ad	328	}
04a773ad JB	329
	330	int cfg80211_ibss_wext_giwfreq(struct net_device *dev,
	331	struct iw_request_info *info,
	332	struct iw_freq freq, char extra)
	333	{
	334	struct wireless_dev *wdev = dev->ieee80211_ptr;
	335	struct ieee80211_channel *chan = NULL;
	336
	337	/* call only for ibss! */
	338	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	339	return -EINVAL;
	340
667503dd	341	wdev_lock(wdev);
04a773ad	342	if (wdev->current_bss)
19957bb3	343	chan = wdev->current_bss->pub.channel;
cbe8fa9c JB	344	else if (wdev->wext.ibss.channel)
cbe8fa9c JB	345	chan = wdev->wext.ibss.channel;
667503dd	346	wdev_unlock(wdev);
04a773ad JB	347
	348	if (chan) {
	349	freq->m = chan->center_freq;
	350	freq->e = 6;
	351	return 0;
	352	}
	353
	354	/* no channel if not joining */
	355	return -EINVAL;
	356	}
04a773ad JB	357
	358	int cfg80211_ibss_wext_siwessid(struct net_device *dev,
	359	struct iw_request_info *info,
	360	struct iw_point data, char ssid)
	361	{
	362	struct wireless_dev *wdev = dev->ieee80211_ptr;
59bbb6f7	363	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
04a773ad JB	364	size_t len = data->length;
	365	int err;
	366
	367	/* call only for ibss! */
	368	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	369	return -EINVAL;
	370
59bbb6f7	371	if (!rdev->ops->join_ibss)
04a773ad JB	372	return -EOPNOTSUPP;
04a773ad JB	373
667503dd JB	374	wdev_lock(wdev);
	375	err = 0;
	376	if (wdev->ssid_len)
59bbb6f7	377	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	378	wdev_unlock(wdev);
	379
	380	if (err)
	381	return err;
04a773ad JB	382
	383	/* iwconfig uses nul termination in SSID.. */
	384	if (len > 0 && ssid[len - 1] == '\0')
	385	len--;
	386
cbe8fa9c JB	387	wdev->wext.ibss.ssid = wdev->ssid;
	388	memcpy(wdev->wext.ibss.ssid, ssid, len);
	389	wdev->wext.ibss.ssid_len = len;
04a773ad	390
59bbb6f7	391	mutex_lock(&rdev->devlist_mtx);
fffd0934	392	wdev_lock(wdev);
59bbb6f7	393	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934	394	wdev_unlock(wdev);
59bbb6f7	395	mutex_unlock(&rdev->devlist_mtx);
fffd0934 JB	396
fffd0934 JB	397	return err;
04a773ad	398	}
04a773ad JB	399
	400	int cfg80211_ibss_wext_giwessid(struct net_device *dev,
	401	struct iw_request_info *info,
	402	struct iw_point data, char ssid)
	403	{
	404	struct wireless_dev *wdev = dev->ieee80211_ptr;
	405
	406	/* call only for ibss! */
	407	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	408	return -EINVAL;
	409
	410	data->flags = 0;
	411
667503dd	412	wdev_lock(wdev);
04a773ad JB	413	if (wdev->ssid_len) {
	414	data->flags = 1;
	415	data->length = wdev->ssid_len;
	416	memcpy(ssid, wdev->ssid, data->length);
cbe8fa9c	417	} else if (wdev->wext.ibss.ssid && wdev->wext.ibss.ssid_len) {
04a773ad	418	data->flags = 1;
cbe8fa9c JB	419	data->length = wdev->wext.ibss.ssid_len;
cbe8fa9c JB	420	memcpy(ssid, wdev->wext.ibss.ssid, data->length);
04a773ad	421	}
667503dd	422	wdev_unlock(wdev);
04a773ad JB	423
	424	return 0;
	425	}
04a773ad JB	426
	427	int cfg80211_ibss_wext_siwap(struct net_device *dev,
	428	struct iw_request_info *info,
	429	struct sockaddr ap_addr, char extra)
	430	{
	431	struct wireless_dev *wdev = dev->ieee80211_ptr;
59bbb6f7	432	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
04a773ad JB	433	u8 *bssid = ap_addr->sa_data;
	434	int err;
	435
	436	/* call only for ibss! */
	437	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	438	return -EINVAL;
	439
59bbb6f7	440	if (!rdev->ops->join_ibss)
04a773ad JB	441	return -EOPNOTSUPP;
	442
	443	if (ap_addr->sa_family != ARPHRD_ETHER)
	444	return -EINVAL;
	445
	446	/* automatic mode */
	447	if (is_zero_ether_addr(bssid) \|\| is_broadcast_ether_addr(bssid))
	448	bssid = NULL;
	449
	450	/* both automatic */
cbe8fa9c	451	if (!bssid && !wdev->wext.ibss.bssid)
04a773ad JB	452	return 0;
	453
	454	/* fixed already - and no change */
cbe8fa9c JB	455	if (wdev->wext.ibss.bssid && bssid &&
cbe8fa9c JB	456	compare_ether_addr(bssid, wdev->wext.ibss.bssid) == 0)
04a773ad JB	457	return 0;
04a773ad JB	458
667503dd JB	459	wdev_lock(wdev);
	460	err = 0;
	461	if (wdev->ssid_len)
59bbb6f7	462	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	463	wdev_unlock(wdev);
	464
	465	if (err)
	466	return err;
04a773ad JB	467
04a773ad JB	468	if (bssid) {
cbe8fa9c JB	469	memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
cbe8fa9c JB	470	wdev->wext.ibss.bssid = wdev->wext.bssid;
04a773ad	471	} else
cbe8fa9c	472	wdev->wext.ibss.bssid = NULL;
04a773ad	473
59bbb6f7	474	mutex_lock(&rdev->devlist_mtx);
fffd0934	475	wdev_lock(wdev);
59bbb6f7	476	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934	477	wdev_unlock(wdev);
59bbb6f7	478	mutex_unlock(&rdev->devlist_mtx);
fffd0934 JB	479
fffd0934 JB	480	return err;
04a773ad	481	}
04a773ad JB	482
	483	int cfg80211_ibss_wext_giwap(struct net_device *dev,
	484	struct iw_request_info *info,
	485	struct sockaddr ap_addr, char extra)
	486	{
	487	struct wireless_dev *wdev = dev->ieee80211_ptr;
	488
	489	/* call only for ibss! */
	490	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	491	return -EINVAL;
	492
	493	ap_addr->sa_family = ARPHRD_ETHER;
	494
667503dd	495	wdev_lock(wdev);
7ebbe6bd	496	if (wdev->current_bss)
19957bb3	497	memcpy(ap_addr->sa_data, wdev->current_bss->pub.bssid, ETH_ALEN);
80e5b06a	498	else if (wdev->wext.ibss.bssid)
cbe8fa9c	499	memcpy(ap_addr->sa_data, wdev->wext.ibss.bssid, ETH_ALEN);
80e5b06a ZY	500	else
	501	memset(ap_addr->sa_data, 0, ETH_ALEN);
	502
667503dd JB	503	wdev_unlock(wdev);
667503dd JB	504
04a773ad JB	505	return 0;
04a773ad JB	506	}
04a773ad	507	#endif