[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 <linux/slab.h>
#include <linux/export.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 (!params->basic_rates) {
		/*
		* If no rates were explicitly configured,
		* use the mandatory rate set for 11b or
		* 11a for maximum compatibility.
		*/
		struct ieee80211_supported_band *sband =
			rdev->wiphy.bands[params->channel->band];
		int j;
		u32 flag = params->channel->band == IEEE80211_BAND_5GHZ ?
			IEEE80211_RATE_MANDATORY_A :
			IEEE80211_RATE_MANDATORY_B;

		for (j = 0; j < sband->n_bitrates; j++) {
			if (sband->bitrates[j].flags & flag)
				params->basic_rates |= BIT(j);
		}
	}

	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, false, 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 <[email protected]>
	5	*/
	6
	7	#include <linux/etherdevice.h>
	8	#include <linux/if_arp.h>
5a0e3ad6	9	#include <linux/slab.h>
bc3b2d7f	10	#include <linux/export.h>
04a773ad	11	#include <net/cfg80211.h>
0e82ffe3	12	#include "wext-compat.h"
04a773ad JB	13	#include "nl80211.h"
	14
	15
667503dd	16	void __cfg80211_ibss_joined(struct net_device dev, const u8 bssid)
04a773ad JB	17	{
	18	struct wireless_dev *wdev = dev->ieee80211_ptr;
	19	struct cfg80211_bss *bss;
3d23e349	20	#ifdef CONFIG_CFG80211_WEXT
04a773ad JB	21	union iwreq_data wrqu;
	22	#endif
	23
	24	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	25	return;
	26
f7969969	27	if (!wdev->ssid_len)
04a773ad JB	28	return;
04a773ad JB	29
04a773ad JB	30	bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
	31	wdev->ssid, wdev->ssid_len,
	32	WLAN_CAPABILITY_IBSS, WLAN_CAPABILITY_IBSS);
	33
	34	if (WARN_ON(!bss))
	35	return;
	36
	37	if (wdev->current_bss) {
	38	cfg80211_unhold_bss(wdev->current_bss);
19957bb3	39	cfg80211_put_bss(&wdev->current_bss->pub);
04a773ad JB	40	}
04a773ad JB	41
19957bb3 JB	42	cfg80211_hold_bss(bss_from_pub(bss));
19957bb3 JB	43	wdev->current_bss = bss_from_pub(bss);
04a773ad	44
fffd0934 JB	45	cfg80211_upload_connect_keys(wdev);
fffd0934 JB	46
667503dd JB	47	nl80211_send_ibss_bssid(wiphy_to_dev(wdev->wiphy), dev, bssid,
667503dd JB	48	GFP_KERNEL);
3d23e349	49	#ifdef CONFIG_CFG80211_WEXT
04a773ad JB	50	memset(&wrqu, 0, sizeof(wrqu));
	51	memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
	52	wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
	53	#endif
	54	}
667503dd JB	55
	56	void cfg80211_ibss_joined(struct net_device dev, const u8 bssid, gfp_t gfp)
	57	{
	58	struct wireless_dev *wdev = dev->ieee80211_ptr;
	59	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
	60	struct cfg80211_event *ev;
	61	unsigned long flags;
	62
f7969969 JB	63	CFG80211_DEV_WARN_ON(!wdev->ssid_len);
f7969969 JB	64
667503dd JB	65	ev = kzalloc(sizeof(*ev), gfp);
	66	if (!ev)
	67	return;
	68
	69	ev->type = EVENT_IBSS_JOINED;
	70	memcpy(ev->cr.bssid, bssid, ETH_ALEN);
	71
	72	spin_lock_irqsave(&wdev->event_lock, flags);
	73	list_add_tail(&ev->list, &wdev->event_list);
	74	spin_unlock_irqrestore(&wdev->event_lock, flags);
e60d7443	75	queue_work(cfg80211_wq, &rdev->event_work);
667503dd	76	}
04a773ad JB	77	EXPORT_SYMBOL(cfg80211_ibss_joined);
04a773ad JB	78
667503dd JB	79	int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
667503dd JB	80	struct net_device *dev,
fffd0934 JB	81	struct cfg80211_ibss_params *params,
fffd0934 JB	82	struct cfg80211_cached_keys *connkeys)
04a773ad JB	83	{
	84	struct wireless_dev *wdev = dev->ieee80211_ptr;
	85	int err;
	86
667503dd JB	87	ASSERT_WDEV_LOCK(wdev);
667503dd JB	88
04a773ad JB	89	if (wdev->ssid_len)
	90	return -EALREADY;
	91
93b05238 JB	92	if (!params->basic_rates) {
	93	/*
	94	* If no rates were explicitly configured,
	95	* use the mandatory rate set for 11b or
	96	* 11a for maximum compatibility.
	97	*/
	98	struct ieee80211_supported_band *sband =
	99	rdev->wiphy.bands[params->channel->band];
	100	int j;
	101	u32 flag = params->channel->band == IEEE80211_BAND_5GHZ ?
	102	IEEE80211_RATE_MANDATORY_A :
	103	IEEE80211_RATE_MANDATORY_B;
	104
	105	for (j = 0; j < sband->n_bitrates; j++) {
	106	if (sband->bitrates[j].flags & flag)
	107	params->basic_rates \|= BIT(j);
	108	}
	109	}
	110
fffd0934 JB	111	if (WARN_ON(wdev->connect_keys))
	112	kfree(wdev->connect_keys);
	113	wdev->connect_keys = connkeys;
	114
3d23e349	115	#ifdef CONFIG_CFG80211_WEXT
cbe8fa9c	116	wdev->wext.ibss.channel = params->channel;
04a773ad JB	117	#endif
04a773ad JB	118	err = rdev->ops->join_ibss(&rdev->wiphy, dev, params);
fffd0934 JB	119	if (err) {
fffd0934 JB	120	wdev->connect_keys = NULL;
04a773ad	121	return err;
fffd0934	122	}
04a773ad JB	123
	124	memcpy(wdev->ssid, params->ssid, params->ssid_len);
	125	wdev->ssid_len = params->ssid_len;
	126
	127	return 0;
	128	}
	129
667503dd JB	130	int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
667503dd JB	131	struct net_device *dev,
fffd0934 JB	132	struct cfg80211_ibss_params *params,
fffd0934 JB	133	struct cfg80211_cached_keys *connkeys)
667503dd JB	134	{
	135	struct wireless_dev *wdev = dev->ieee80211_ptr;
	136	int err;
	137
59bbb6f7	138	mutex_lock(&rdev->devlist_mtx);
667503dd	139	wdev_lock(wdev);
fffd0934	140	err = __cfg80211_join_ibss(rdev, dev, params, connkeys);
667503dd	141	wdev_unlock(wdev);
59bbb6f7	142	mutex_unlock(&rdev->devlist_mtx);
667503dd JB	143
	144	return err;
	145	}
	146
	147	static void __cfg80211_clear_ibss(struct net_device *dev, bool nowext)
04a773ad JB	148	{
04a773ad JB	149	struct wireless_dev *wdev = dev->ieee80211_ptr;
fffd0934 JB	150	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
fffd0934 JB	151	int i;
04a773ad	152
667503dd JB	153	ASSERT_WDEV_LOCK(wdev);
667503dd JB	154
fffd0934 JB	155	kfree(wdev->connect_keys);
	156	wdev->connect_keys = NULL;
	157
	158	/*
	159	* Delete all the keys ... pairwise keys can't really
	160	* exist any more anyway, but default keys might.
	161	*/
	162	if (rdev->ops->del_key)
	163	for (i = 0; i < 6; i++)
e31b8213	164	rdev->ops->del_key(wdev->wiphy, dev, i, false, NULL);
fffd0934	165
04a773ad JB	166	if (wdev->current_bss) {
04a773ad JB	167	cfg80211_unhold_bss(wdev->current_bss);
19957bb3	168	cfg80211_put_bss(&wdev->current_bss->pub);
04a773ad JB	169	}
	170
	171	wdev->current_bss = NULL;
	172	wdev->ssid_len = 0;
3d23e349	173	#ifdef CONFIG_CFG80211_WEXT
9d308429	174	if (!nowext)
cbe8fa9c	175	wdev->wext.ibss.ssid_len = 0;
9d308429	176	#endif
04a773ad JB	177	}
04a773ad JB	178
667503dd JB	179	void cfg80211_clear_ibss(struct net_device *dev, bool nowext)
	180	{
	181	struct wireless_dev *wdev = dev->ieee80211_ptr;
	182
	183	wdev_lock(wdev);
	184	__cfg80211_clear_ibss(dev, nowext);
	185	wdev_unlock(wdev);
	186	}
	187
98d3a7ca JB	188	int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
98d3a7ca JB	189	struct net_device *dev, bool nowext)
04a773ad	190	{
78485475	191	struct wireless_dev *wdev = dev->ieee80211_ptr;
04a773ad JB	192	int err;
04a773ad JB	193
667503dd JB	194	ASSERT_WDEV_LOCK(wdev);
667503dd JB	195
78485475 JB	196	if (!wdev->ssid_len)
	197	return -ENOLINK;
	198
04a773ad JB	199	err = rdev->ops->leave_ibss(&rdev->wiphy, dev);
	200
	201	if (err)
	202	return err;
	203
667503dd	204	__cfg80211_clear_ibss(dev, nowext);
04a773ad JB	205
	206	return 0;
	207	}
	208
667503dd JB	209	int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
	210	struct net_device *dev, bool nowext)
	211	{
	212	struct wireless_dev *wdev = dev->ieee80211_ptr;
	213	int err;
	214
	215	wdev_lock(wdev);
	216	err = __cfg80211_leave_ibss(rdev, dev, nowext);
	217	wdev_unlock(wdev);
	218
	219	return err;
	220	}
	221
3d23e349	222	#ifdef CONFIG_CFG80211_WEXT
fffd0934 JB	223	int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
fffd0934 JB	224	struct wireless_dev *wdev)
04a773ad	225	{
fffd0934	226	struct cfg80211_cached_keys *ck = NULL;
04a773ad	227	enum ieee80211_band band;
fffd0934 JB	228	int i, err;
	229
	230	ASSERT_WDEV_LOCK(wdev);
04a773ad	231
cbe8fa9c JB	232	if (!wdev->wext.ibss.beacon_interval)
cbe8fa9c JB	233	wdev->wext.ibss.beacon_interval = 100;
8e30bc55	234
04a773ad	235	/* try to find an IBSS channel if none requested ... */
cbe8fa9c	236	if (!wdev->wext.ibss.channel) {
04a773ad JB	237	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
	238	struct ieee80211_supported_band *sband;
	239	struct ieee80211_channel *chan;
	240
	241	sband = rdev->wiphy.bands[band];
	242	if (!sband)
	243	continue;
	244
	245	for (i = 0; i < sband->n_channels; i++) {
	246	chan = &sband->channels[i];
	247	if (chan->flags & IEEE80211_CHAN_NO_IBSS)
	248	continue;
	249	if (chan->flags & IEEE80211_CHAN_DISABLED)
	250	continue;
cbe8fa9c	251	wdev->wext.ibss.channel = chan;
04a773ad JB	252	break;
	253	}
	254
cbe8fa9c	255	if (wdev->wext.ibss.channel)
04a773ad JB	256	break;
	257	}
	258
cbe8fa9c	259	if (!wdev->wext.ibss.channel)
04a773ad JB	260	return -EINVAL;
	261	}
	262
	263	/* don't join -- SSID is not there */
cbe8fa9c	264	if (!wdev->wext.ibss.ssid_len)
04a773ad JB	265	return 0;
	266
	267	if (!netif_running(wdev->netdev))
	268	return 0;
	269
3be61a38	270	if (wdev->wext.keys) {
fffd0934	271	wdev->wext.keys->def = wdev->wext.default_key;
3be61a38 JB	272	wdev->wext.keys->defmgmt = wdev->wext.default_mgmt_key;
3be61a38 JB	273	}
fffd0934 JB	274
	275	wdev->wext.ibss.privacy = wdev->wext.default_key != -1;
	276
	277	if (wdev->wext.keys) {
	278	ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL);
	279	if (!ck)
	280	return -ENOMEM;
	281	for (i = 0; i < 6; i++)
	282	ck->params[i].key = ck->data[i];
	283	}
	284	err = __cfg80211_join_ibss(rdev, wdev->netdev,
	285	&wdev->wext.ibss, ck);
	286	if (err)
	287	kfree(ck);
	288
	289	return err;
04a773ad JB	290	}
	291
	292	int cfg80211_ibss_wext_siwfreq(struct net_device *dev,
	293	struct iw_request_info *info,
59bbb6f7	294	struct iw_freq wextfreq, char extra)
04a773ad JB	295	{
04a773ad JB	296	struct wireless_dev *wdev = dev->ieee80211_ptr;
59bbb6f7 JB	297	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
	298	struct ieee80211_channel *chan = NULL;
	299	int err, freq;
04a773ad JB	300
	301	/* call only for ibss! */
	302	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	303	return -EINVAL;
	304
59bbb6f7	305	if (!rdev->ops->join_ibss)
04a773ad JB	306	return -EOPNOTSUPP;
04a773ad JB	307
59bbb6f7 JB	308	freq = cfg80211_wext_freq(wdev->wiphy, wextfreq);
	309	if (freq < 0)
	310	return freq;
04a773ad	311
59bbb6f7 JB	312	if (freq) {
	313	chan = ieee80211_get_channel(wdev->wiphy, freq);
	314	if (!chan)
	315	return -EINVAL;
	316	if (chan->flags & IEEE80211_CHAN_NO_IBSS \|\|
	317	chan->flags & IEEE80211_CHAN_DISABLED)
	318	return -EINVAL;
	319	}
04a773ad	320
cbe8fa9c	321	if (wdev->wext.ibss.channel == chan)
04a773ad JB	322	return 0;
04a773ad JB	323
667503dd JB	324	wdev_lock(wdev);
	325	err = 0;
	326	if (wdev->ssid_len)
59bbb6f7	327	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	328	wdev_unlock(wdev);
	329
	330	if (err)
	331	return err;
04a773ad JB	332
04a773ad JB	333	if (chan) {
cbe8fa9c JB	334	wdev->wext.ibss.channel = chan;
cbe8fa9c JB	335	wdev->wext.ibss.channel_fixed = true;
04a773ad JB	336	} else {
04a773ad JB	337	/* cfg80211_ibss_wext_join will pick one if needed */
cbe8fa9c	338	wdev->wext.ibss.channel_fixed = false;
04a773ad JB	339	}
04a773ad JB	340
59bbb6f7	341	mutex_lock(&rdev->devlist_mtx);
fffd0934	342	wdev_lock(wdev);
59bbb6f7	343	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934	344	wdev_unlock(wdev);
59bbb6f7	345	mutex_unlock(&rdev->devlist_mtx);
fffd0934 JB	346
fffd0934 JB	347	return err;
04a773ad	348	}
04a773ad JB	349
	350	int cfg80211_ibss_wext_giwfreq(struct net_device *dev,
	351	struct iw_request_info *info,
	352	struct iw_freq freq, char extra)
	353	{
	354	struct wireless_dev *wdev = dev->ieee80211_ptr;
	355	struct ieee80211_channel *chan = NULL;
	356
	357	/* call only for ibss! */
	358	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	359	return -EINVAL;
	360
667503dd	361	wdev_lock(wdev);
04a773ad	362	if (wdev->current_bss)
19957bb3	363	chan = wdev->current_bss->pub.channel;
cbe8fa9c JB	364	else if (wdev->wext.ibss.channel)
cbe8fa9c JB	365	chan = wdev->wext.ibss.channel;
667503dd	366	wdev_unlock(wdev);
04a773ad JB	367
	368	if (chan) {
	369	freq->m = chan->center_freq;
	370	freq->e = 6;
	371	return 0;
	372	}
	373
	374	/* no channel if not joining */
	375	return -EINVAL;
	376	}
04a773ad JB	377
	378	int cfg80211_ibss_wext_siwessid(struct net_device *dev,
	379	struct iw_request_info *info,
	380	struct iw_point data, char ssid)
	381	{
	382	struct wireless_dev *wdev = dev->ieee80211_ptr;
59bbb6f7	383	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
04a773ad JB	384	size_t len = data->length;
	385	int err;
	386
	387	/* call only for ibss! */
	388	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	389	return -EINVAL;
	390
59bbb6f7	391	if (!rdev->ops->join_ibss)
04a773ad JB	392	return -EOPNOTSUPP;
04a773ad JB	393
667503dd JB	394	wdev_lock(wdev);
	395	err = 0;
	396	if (wdev->ssid_len)
59bbb6f7	397	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	398	wdev_unlock(wdev);
	399
	400	if (err)
	401	return err;
04a773ad JB	402
	403	/* iwconfig uses nul termination in SSID.. */
	404	if (len > 0 && ssid[len - 1] == '\0')
	405	len--;
	406
cbe8fa9c JB	407	wdev->wext.ibss.ssid = wdev->ssid;
	408	memcpy(wdev->wext.ibss.ssid, ssid, len);
	409	wdev->wext.ibss.ssid_len = len;
04a773ad	410
59bbb6f7	411	mutex_lock(&rdev->devlist_mtx);
fffd0934	412	wdev_lock(wdev);
59bbb6f7	413	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934	414	wdev_unlock(wdev);
59bbb6f7	415	mutex_unlock(&rdev->devlist_mtx);
fffd0934 JB	416
fffd0934 JB	417	return err;
04a773ad	418	}
04a773ad JB	419
	420	int cfg80211_ibss_wext_giwessid(struct net_device *dev,
	421	struct iw_request_info *info,
	422	struct iw_point data, char ssid)
	423	{
	424	struct wireless_dev *wdev = dev->ieee80211_ptr;
	425
	426	/* call only for ibss! */
	427	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	428	return -EINVAL;
	429
	430	data->flags = 0;
	431
667503dd	432	wdev_lock(wdev);
04a773ad JB	433	if (wdev->ssid_len) {
	434	data->flags = 1;
	435	data->length = wdev->ssid_len;
	436	memcpy(ssid, wdev->ssid, data->length);
cbe8fa9c	437	} else if (wdev->wext.ibss.ssid && wdev->wext.ibss.ssid_len) {
04a773ad	438	data->flags = 1;
cbe8fa9c JB	439	data->length = wdev->wext.ibss.ssid_len;
cbe8fa9c JB	440	memcpy(ssid, wdev->wext.ibss.ssid, data->length);
04a773ad	441	}
667503dd	442	wdev_unlock(wdev);
04a773ad JB	443
	444	return 0;
	445	}
04a773ad JB	446
	447	int cfg80211_ibss_wext_siwap(struct net_device *dev,
	448	struct iw_request_info *info,
	449	struct sockaddr ap_addr, char extra)
	450	{
	451	struct wireless_dev *wdev = dev->ieee80211_ptr;
59bbb6f7	452	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
04a773ad JB	453	u8 *bssid = ap_addr->sa_data;
	454	int err;
	455
	456	/* call only for ibss! */
	457	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	458	return -EINVAL;
	459
59bbb6f7	460	if (!rdev->ops->join_ibss)
04a773ad JB	461	return -EOPNOTSUPP;
	462
	463	if (ap_addr->sa_family != ARPHRD_ETHER)
	464	return -EINVAL;
	465
	466	/* automatic mode */
	467	if (is_zero_ether_addr(bssid) \|\| is_broadcast_ether_addr(bssid))
	468	bssid = NULL;
	469
	470	/* both automatic */
cbe8fa9c	471	if (!bssid && !wdev->wext.ibss.bssid)
04a773ad JB	472	return 0;
	473
	474	/* fixed already - and no change */
cbe8fa9c JB	475	if (wdev->wext.ibss.bssid && bssid &&
cbe8fa9c JB	476	compare_ether_addr(bssid, wdev->wext.ibss.bssid) == 0)
04a773ad JB	477	return 0;
04a773ad JB	478
667503dd JB	479	wdev_lock(wdev);
	480	err = 0;
	481	if (wdev->ssid_len)
59bbb6f7	482	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	483	wdev_unlock(wdev);
	484
	485	if (err)
	486	return err;
04a773ad JB	487
04a773ad JB	488	if (bssid) {
cbe8fa9c JB	489	memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
cbe8fa9c JB	490	wdev->wext.ibss.bssid = wdev->wext.bssid;
04a773ad	491	} else
cbe8fa9c	492	wdev->wext.ibss.bssid = NULL;
04a773ad	493
59bbb6f7	494	mutex_lock(&rdev->devlist_mtx);
fffd0934	495	wdev_lock(wdev);
59bbb6f7	496	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934	497	wdev_unlock(wdev);
59bbb6f7	498	mutex_unlock(&rdev->devlist_mtx);
fffd0934 JB	499
fffd0934 JB	500	return err;
04a773ad	501	}
04a773ad JB	502
	503	int cfg80211_ibss_wext_giwap(struct net_device *dev,
	504	struct iw_request_info *info,
	505	struct sockaddr ap_addr, char extra)
	506	{
	507	struct wireless_dev *wdev = dev->ieee80211_ptr;
	508
	509	/* call only for ibss! */
	510	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	511	return -EINVAL;
	512
	513	ap_addr->sa_family = ARPHRD_ETHER;
	514
667503dd	515	wdev_lock(wdev);
7ebbe6bd	516	if (wdev->current_bss)
19957bb3	517	memcpy(ap_addr->sa_data, wdev->current_bss->pub.bssid, ETH_ALEN);
80e5b06a	518	else if (wdev->wext.ibss.bssid)
cbe8fa9c	519	memcpy(ap_addr->sa_data, wdev->wext.ibss.bssid, ETH_ALEN);
80e5b06a ZY	520	else
	521	memset(ap_addr->sa_data, 0, ETH_ALEN);
	522
667503dd JB	523	wdev_unlock(wdev);
667503dd JB	524
04a773ad JB	525	return 0;
04a773ad JB	526	}
04a773ad	527	#endif