[linux.git] / net / wireless / ibss.c

/*
 * Some IBSS support code for cfg80211.
 *
 * Copyright 2009	Johannes Berg <[email protected]>
 */

#include <linux/etherdevice.h>
#include <linux/if_arp.h>
#include <net/cfg80211.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_WIRELESS_EXT
	union iwreq_data wrqu;
#endif

	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
		return;

	if (WARN_ON(!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);

	nl80211_send_ibss_bssid(wiphy_to_dev(wdev->wiphy), dev, bssid,
				GFP_KERNEL);
#ifdef CONFIG_WIRELESS_EXT
	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;

	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);
	schedule_work(&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 wireless_dev *wdev = dev->ieee80211_ptr;
	int err;

	ASSERT_WDEV_LOCK(wdev);

	if (wdev->ssid_len)
		return -EALREADY;

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

	if (err)
		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 wireless_dev *wdev = dev->ieee80211_ptr;
	int err;

	wdev_lock(wdev);
	err = __cfg80211_join_ibss(rdev, dev, params);
	wdev_unlock(wdev);

	return err;
}

static void __cfg80211_clear_ibss(struct net_device *dev, bool nowext)
{
	struct wireless_dev *wdev = dev->ieee80211_ptr;

	ASSERT_WDEV_LOCK(wdev);

	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_WIRELESS_EXT
	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);
}

static 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_WIRELESS_EXT
static int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
				   struct wireless_dev *wdev)
{
	enum ieee80211_band band;
	int i;

	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;

	return cfg80211_join_ibss(wiphy_to_dev(wdev->wiphy),
				  wdev->netdev, &wdev->wext.ibss);
}

int cfg80211_ibss_wext_siwfreq(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;
	int err;

	/* call only for ibss! */
	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
		return -EINVAL;

	if (!wiphy_to_dev(wdev->wiphy)->ops->join_ibss)
		return -EOPNOTSUPP;

	chan = cfg80211_wext_freq(wdev->wiphy, freq);
	if (chan && IS_ERR(chan))
		return PTR_ERR(chan);

	if (chan &&
	    (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(wiphy_to_dev(wdev->wiphy),
					    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;
	}

	return cfg80211_ibss_wext_join(wiphy_to_dev(wdev->wiphy), wdev);
}
/* temporary symbol - mark GPL - in the future the handler won't be */
EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_siwfreq);

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;
}
/* temporary symbol - mark GPL - in the future the handler won't be */
EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_giwfreq);

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;
	size_t len = data->length;
	int err;

	/* call only for ibss! */
	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
		return -EINVAL;

	if (!wiphy_to_dev(wdev->wiphy)->ops->join_ibss)
		return -EOPNOTSUPP;

	wdev_lock(wdev);
	err = 0;
	if (wdev->ssid_len)
		err = __cfg80211_leave_ibss(wiphy_to_dev(wdev->wiphy),
					    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;

	return cfg80211_ibss_wext_join(wiphy_to_dev(wdev->wiphy), wdev);
}
/* temporary symbol - mark GPL - in the future the handler won't be */
EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_siwessid);

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;
}
/* temporary symbol - mark GPL - in the future the handler won't be */
EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_giwessid);

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;
	u8 *bssid = ap_addr->sa_data;
	int err;

	/* call only for ibss! */
	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
		return -EINVAL;

	if (!wiphy_to_dev(wdev->wiphy)->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(wiphy_to_dev(wdev->wiphy),
					    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;

	return cfg80211_ibss_wext_join(wiphy_to_dev(wdev->wiphy), wdev);
}
/* temporary symbol - mark GPL - in the future the handler won't be */
EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_siwap);

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
		memcpy(ap_addr->sa_data, wdev->wext.ibss.bssid, ETH_ALEN);
	wdev_unlock(wdev);

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