[deliverable/linux.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 "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);

	cfg80211_upload_connect_keys(wdev);

	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 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_WIRELESS_EXT
	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;

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

	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_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
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 *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;
	}

	wdev_lock(wdev);
	err = cfg80211_ibss_wext_join(wiphy_to_dev(wdev->wiphy), wdev);
	wdev_unlock(wdev);

	return err;
}
/* 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;

	wdev_lock(wdev);
	err = cfg80211_ibss_wext_join(wiphy_to_dev(wdev->wiphy), wdev);
	wdev_unlock(wdev);

	return err;
}
/* 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;

	wdev_lock(wdev);
	err = cfg80211_ibss_wext_join(wiphy_to_dev(wdev->wiphy), wdev);
	wdev_unlock(wdev);

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