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