[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 <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);

	wdev->sme_state = CFG80211_SME_CONNECTED;
	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->sme_state != CFG80211_SME_CONNECTING);

	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
	wdev->sme_state = CFG80211_SME_CONNECTING;
	err = rdev->ops->join_ibss(&rdev->wiphy, dev, params);
	if (err) {
		wdev->connect_keys = NULL;
		wdev->sme_state = CFG80211_SME_IDLE;
		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->sme_state = CFG80211_SME_IDLE;
	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 &&
	    ether_addr_equal(bssid, wdev->wext.ibss.bssid))
		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>
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
28f33366	45	wdev->sme_state = CFG80211_SME_CONNECTED;
fffd0934 JB	46	cfg80211_upload_connect_keys(wdev);
fffd0934 JB	47
667503dd JB	48	nl80211_send_ibss_bssid(wiphy_to_dev(wdev->wiphy), dev, bssid,
667503dd JB	49	GFP_KERNEL);
3d23e349	50	#ifdef CONFIG_CFG80211_WEXT
04a773ad JB	51	memset(&wrqu, 0, sizeof(wrqu));
	52	memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
	53	wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
	54	#endif
	55	}
667503dd JB	56
	57	void cfg80211_ibss_joined(struct net_device dev, const u8 bssid, gfp_t gfp)
	58	{
	59	struct wireless_dev *wdev = dev->ieee80211_ptr;
	60	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
	61	struct cfg80211_event *ev;
	62	unsigned long flags;
	63
28f33366	64	CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTING);
f7969969	65
667503dd JB	66	ev = kzalloc(sizeof(*ev), gfp);
	67	if (!ev)
	68	return;
	69
	70	ev->type = EVENT_IBSS_JOINED;
	71	memcpy(ev->cr.bssid, bssid, ETH_ALEN);
	72
	73	spin_lock_irqsave(&wdev->event_lock, flags);
	74	list_add_tail(&ev->list, &wdev->event_list);
	75	spin_unlock_irqrestore(&wdev->event_lock, flags);
e60d7443	76	queue_work(cfg80211_wq, &rdev->event_work);
667503dd	77	}
04a773ad JB	78	EXPORT_SYMBOL(cfg80211_ibss_joined);
04a773ad JB	79
667503dd JB	80	int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
667503dd JB	81	struct net_device *dev,
fffd0934 JB	82	struct cfg80211_ibss_params *params,
fffd0934 JB	83	struct cfg80211_cached_keys *connkeys)
04a773ad JB	84	{
	85	struct wireless_dev *wdev = dev->ieee80211_ptr;
	86	int err;
	87
667503dd JB	88	ASSERT_WDEV_LOCK(wdev);
667503dd JB	89
04a773ad JB	90	if (wdev->ssid_len)
	91	return -EALREADY;
	92
93b05238 JB	93	if (!params->basic_rates) {
	94	/*
	95	* If no rates were explicitly configured,
	96	* use the mandatory rate set for 11b or
	97	* 11a for maximum compatibility.
	98	*/
	99	struct ieee80211_supported_band *sband =
	100	rdev->wiphy.bands[params->channel->band];
	101	int j;
	102	u32 flag = params->channel->band == IEEE80211_BAND_5GHZ ?
	103	IEEE80211_RATE_MANDATORY_A :
	104	IEEE80211_RATE_MANDATORY_B;
	105
	106	for (j = 0; j < sband->n_bitrates; j++) {
	107	if (sband->bitrates[j].flags & flag)
	108	params->basic_rates \|= BIT(j);
	109	}
	110	}
	111
fffd0934 JB	112	if (WARN_ON(wdev->connect_keys))
	113	kfree(wdev->connect_keys);
	114	wdev->connect_keys = connkeys;
	115
3d23e349	116	#ifdef CONFIG_CFG80211_WEXT
cbe8fa9c	117	wdev->wext.ibss.channel = params->channel;
04a773ad	118	#endif
28f33366	119	wdev->sme_state = CFG80211_SME_CONNECTING;
04a773ad	120	err = rdev->ops->join_ibss(&rdev->wiphy, dev, params);
fffd0934 JB	121	if (err) {
fffd0934 JB	122	wdev->connect_keys = NULL;
28f33366	123	wdev->sme_state = CFG80211_SME_IDLE;
04a773ad	124	return err;
fffd0934	125	}
04a773ad JB	126
	127	memcpy(wdev->ssid, params->ssid, params->ssid_len);
	128	wdev->ssid_len = params->ssid_len;
	129
	130	return 0;
	131	}
	132
667503dd JB	133	int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
667503dd JB	134	struct net_device *dev,
fffd0934 JB	135	struct cfg80211_ibss_params *params,
fffd0934 JB	136	struct cfg80211_cached_keys *connkeys)
667503dd JB	137	{
	138	struct wireless_dev *wdev = dev->ieee80211_ptr;
	139	int err;
	140
59bbb6f7	141	mutex_lock(&rdev->devlist_mtx);
667503dd	142	wdev_lock(wdev);
fffd0934	143	err = __cfg80211_join_ibss(rdev, dev, params, connkeys);
667503dd	144	wdev_unlock(wdev);
59bbb6f7	145	mutex_unlock(&rdev->devlist_mtx);
667503dd JB	146
	147	return err;
	148	}
	149
	150	static void __cfg80211_clear_ibss(struct net_device *dev, bool nowext)
04a773ad JB	151	{
04a773ad JB	152	struct wireless_dev *wdev = dev->ieee80211_ptr;
fffd0934 JB	153	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
fffd0934 JB	154	int i;
04a773ad	155
667503dd JB	156	ASSERT_WDEV_LOCK(wdev);
667503dd JB	157
fffd0934 JB	158	kfree(wdev->connect_keys);
	159	wdev->connect_keys = NULL;
	160
	161	/*
	162	* Delete all the keys ... pairwise keys can't really
	163	* exist any more anyway, but default keys might.
	164	*/
	165	if (rdev->ops->del_key)
	166	for (i = 0; i < 6; i++)
e31b8213	167	rdev->ops->del_key(wdev->wiphy, dev, i, false, NULL);
fffd0934	168
04a773ad JB	169	if (wdev->current_bss) {
04a773ad JB	170	cfg80211_unhold_bss(wdev->current_bss);
19957bb3	171	cfg80211_put_bss(&wdev->current_bss->pub);
04a773ad JB	172	}
	173
	174	wdev->current_bss = NULL;
28f33366	175	wdev->sme_state = CFG80211_SME_IDLE;
04a773ad	176	wdev->ssid_len = 0;
3d23e349	177	#ifdef CONFIG_CFG80211_WEXT
9d308429	178	if (!nowext)
cbe8fa9c	179	wdev->wext.ibss.ssid_len = 0;
9d308429	180	#endif
04a773ad JB	181	}
04a773ad JB	182
667503dd JB	183	void cfg80211_clear_ibss(struct net_device *dev, bool nowext)
	184	{
	185	struct wireless_dev *wdev = dev->ieee80211_ptr;
	186
	187	wdev_lock(wdev);
	188	__cfg80211_clear_ibss(dev, nowext);
	189	wdev_unlock(wdev);
	190	}
	191
98d3a7ca JB	192	int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
98d3a7ca JB	193	struct net_device *dev, bool nowext)
04a773ad	194	{
78485475	195	struct wireless_dev *wdev = dev->ieee80211_ptr;
04a773ad JB	196	int err;
04a773ad JB	197
667503dd JB	198	ASSERT_WDEV_LOCK(wdev);
667503dd JB	199
78485475 JB	200	if (!wdev->ssid_len)
	201	return -ENOLINK;
	202
04a773ad JB	203	err = rdev->ops->leave_ibss(&rdev->wiphy, dev);
	204
	205	if (err)
	206	return err;
	207
667503dd	208	__cfg80211_clear_ibss(dev, nowext);
04a773ad JB	209
	210	return 0;
	211	}
	212
667503dd JB	213	int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
	214	struct net_device *dev, bool nowext)
	215	{
	216	struct wireless_dev *wdev = dev->ieee80211_ptr;
	217	int err;
	218
	219	wdev_lock(wdev);
	220	err = __cfg80211_leave_ibss(rdev, dev, nowext);
	221	wdev_unlock(wdev);
	222
	223	return err;
	224	}
	225
3d23e349	226	#ifdef CONFIG_CFG80211_WEXT
fffd0934 JB	227	int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
fffd0934 JB	228	struct wireless_dev *wdev)
04a773ad	229	{
fffd0934	230	struct cfg80211_cached_keys *ck = NULL;
04a773ad	231	enum ieee80211_band band;
fffd0934 JB	232	int i, err;
	233
	234	ASSERT_WDEV_LOCK(wdev);
04a773ad	235
cbe8fa9c JB	236	if (!wdev->wext.ibss.beacon_interval)
cbe8fa9c JB	237	wdev->wext.ibss.beacon_interval = 100;
8e30bc55	238
04a773ad	239	/* try to find an IBSS channel if none requested ... */
cbe8fa9c	240	if (!wdev->wext.ibss.channel) {
04a773ad JB	241	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
	242	struct ieee80211_supported_band *sband;
	243	struct ieee80211_channel *chan;
	244
	245	sband = rdev->wiphy.bands[band];
	246	if (!sband)
	247	continue;
	248
	249	for (i = 0; i < sband->n_channels; i++) {
	250	chan = &sband->channels[i];
	251	if (chan->flags & IEEE80211_CHAN_NO_IBSS)
	252	continue;
	253	if (chan->flags & IEEE80211_CHAN_DISABLED)
	254	continue;
cbe8fa9c	255	wdev->wext.ibss.channel = chan;
04a773ad JB	256	break;
	257	}
	258
cbe8fa9c	259	if (wdev->wext.ibss.channel)
04a773ad JB	260	break;
	261	}
	262
cbe8fa9c	263	if (!wdev->wext.ibss.channel)
04a773ad JB	264	return -EINVAL;
	265	}
	266
	267	/* don't join -- SSID is not there */
cbe8fa9c	268	if (!wdev->wext.ibss.ssid_len)
04a773ad JB	269	return 0;
	270
	271	if (!netif_running(wdev->netdev))
	272	return 0;
	273
3be61a38	274	if (wdev->wext.keys) {
fffd0934	275	wdev->wext.keys->def = wdev->wext.default_key;
3be61a38 JB	276	wdev->wext.keys->defmgmt = wdev->wext.default_mgmt_key;
3be61a38 JB	277	}
fffd0934 JB	278
	279	wdev->wext.ibss.privacy = wdev->wext.default_key != -1;
	280
	281	if (wdev->wext.keys) {
	282	ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL);
	283	if (!ck)
	284	return -ENOMEM;
	285	for (i = 0; i < 6; i++)
	286	ck->params[i].key = ck->data[i];
	287	}
	288	err = __cfg80211_join_ibss(rdev, wdev->netdev,
	289	&wdev->wext.ibss, ck);
	290	if (err)
	291	kfree(ck);
	292
	293	return err;
04a773ad JB	294	}
	295
	296	int cfg80211_ibss_wext_siwfreq(struct net_device *dev,
	297	struct iw_request_info *info,
59bbb6f7	298	struct iw_freq wextfreq, char extra)
04a773ad JB	299	{
04a773ad JB	300	struct wireless_dev *wdev = dev->ieee80211_ptr;
59bbb6f7 JB	301	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
	302	struct ieee80211_channel *chan = NULL;
	303	int err, freq;
04a773ad JB	304
	305	/* call only for ibss! */
	306	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	307	return -EINVAL;
	308
59bbb6f7	309	if (!rdev->ops->join_ibss)
04a773ad JB	310	return -EOPNOTSUPP;
04a773ad JB	311
59bbb6f7 JB	312	freq = cfg80211_wext_freq(wdev->wiphy, wextfreq);
	313	if (freq < 0)
	314	return freq;
04a773ad	315
59bbb6f7 JB	316	if (freq) {
	317	chan = ieee80211_get_channel(wdev->wiphy, freq);
	318	if (!chan)
	319	return -EINVAL;
	320	if (chan->flags & IEEE80211_CHAN_NO_IBSS \|\|
	321	chan->flags & IEEE80211_CHAN_DISABLED)
	322	return -EINVAL;
	323	}
04a773ad	324
cbe8fa9c	325	if (wdev->wext.ibss.channel == chan)
04a773ad JB	326	return 0;
04a773ad JB	327
667503dd JB	328	wdev_lock(wdev);
	329	err = 0;
	330	if (wdev->ssid_len)
59bbb6f7	331	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	332	wdev_unlock(wdev);
	333
	334	if (err)
	335	return err;
04a773ad JB	336
04a773ad JB	337	if (chan) {
cbe8fa9c JB	338	wdev->wext.ibss.channel = chan;
cbe8fa9c JB	339	wdev->wext.ibss.channel_fixed = true;
04a773ad JB	340	} else {
04a773ad JB	341	/* cfg80211_ibss_wext_join will pick one if needed */
cbe8fa9c	342	wdev->wext.ibss.channel_fixed = false;
04a773ad JB	343	}
04a773ad JB	344
59bbb6f7	345	mutex_lock(&rdev->devlist_mtx);
fffd0934	346	wdev_lock(wdev);
59bbb6f7	347	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934	348	wdev_unlock(wdev);
59bbb6f7	349	mutex_unlock(&rdev->devlist_mtx);
fffd0934 JB	350
fffd0934 JB	351	return err;
04a773ad	352	}
04a773ad JB	353
	354	int cfg80211_ibss_wext_giwfreq(struct net_device *dev,
	355	struct iw_request_info *info,
	356	struct iw_freq freq, char extra)
	357	{
	358	struct wireless_dev *wdev = dev->ieee80211_ptr;
	359	struct ieee80211_channel *chan = NULL;
	360
	361	/* call only for ibss! */
	362	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	363	return -EINVAL;
	364
667503dd	365	wdev_lock(wdev);
04a773ad	366	if (wdev->current_bss)
19957bb3	367	chan = wdev->current_bss->pub.channel;
cbe8fa9c JB	368	else if (wdev->wext.ibss.channel)
cbe8fa9c JB	369	chan = wdev->wext.ibss.channel;
667503dd	370	wdev_unlock(wdev);
04a773ad JB	371
	372	if (chan) {
	373	freq->m = chan->center_freq;
	374	freq->e = 6;
	375	return 0;
	376	}
	377
	378	/* no channel if not joining */
	379	return -EINVAL;
	380	}
04a773ad JB	381
	382	int cfg80211_ibss_wext_siwessid(struct net_device *dev,
	383	struct iw_request_info *info,
	384	struct iw_point data, char ssid)
	385	{
	386	struct wireless_dev *wdev = dev->ieee80211_ptr;
59bbb6f7	387	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
04a773ad JB	388	size_t len = data->length;
	389	int err;
	390
	391	/* call only for ibss! */
	392	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	393	return -EINVAL;
	394
59bbb6f7	395	if (!rdev->ops->join_ibss)
04a773ad JB	396	return -EOPNOTSUPP;
04a773ad JB	397
667503dd JB	398	wdev_lock(wdev);
	399	err = 0;
	400	if (wdev->ssid_len)
59bbb6f7	401	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	402	wdev_unlock(wdev);
	403
	404	if (err)
	405	return err;
04a773ad JB	406
	407	/* iwconfig uses nul termination in SSID.. */
	408	if (len > 0 && ssid[len - 1] == '\0')
	409	len--;
	410
cbe8fa9c JB	411	wdev->wext.ibss.ssid = wdev->ssid;
	412	memcpy(wdev->wext.ibss.ssid, ssid, len);
	413	wdev->wext.ibss.ssid_len = len;
04a773ad	414
59bbb6f7	415	mutex_lock(&rdev->devlist_mtx);
fffd0934	416	wdev_lock(wdev);
59bbb6f7	417	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934	418	wdev_unlock(wdev);
59bbb6f7	419	mutex_unlock(&rdev->devlist_mtx);
fffd0934 JB	420
fffd0934 JB	421	return err;
04a773ad	422	}
04a773ad JB	423
	424	int cfg80211_ibss_wext_giwessid(struct net_device *dev,
	425	struct iw_request_info *info,
	426	struct iw_point data, char ssid)
	427	{
	428	struct wireless_dev *wdev = dev->ieee80211_ptr;
	429
	430	/* call only for ibss! */
	431	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	432	return -EINVAL;
	433
	434	data->flags = 0;
	435
667503dd	436	wdev_lock(wdev);
04a773ad JB	437	if (wdev->ssid_len) {
	438	data->flags = 1;
	439	data->length = wdev->ssid_len;
	440	memcpy(ssid, wdev->ssid, data->length);
cbe8fa9c	441	} else if (wdev->wext.ibss.ssid && wdev->wext.ibss.ssid_len) {
04a773ad	442	data->flags = 1;
cbe8fa9c JB	443	data->length = wdev->wext.ibss.ssid_len;
cbe8fa9c JB	444	memcpy(ssid, wdev->wext.ibss.ssid, data->length);
04a773ad	445	}
667503dd	446	wdev_unlock(wdev);
04a773ad JB	447
	448	return 0;
	449	}
04a773ad JB	450
	451	int cfg80211_ibss_wext_siwap(struct net_device *dev,
	452	struct iw_request_info *info,
	453	struct sockaddr ap_addr, char extra)
	454	{
	455	struct wireless_dev *wdev = dev->ieee80211_ptr;
59bbb6f7	456	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
04a773ad JB	457	u8 *bssid = ap_addr->sa_data;
	458	int err;
	459
	460	/* call only for ibss! */
	461	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	462	return -EINVAL;
	463
59bbb6f7	464	if (!rdev->ops->join_ibss)
04a773ad JB	465	return -EOPNOTSUPP;
	466
	467	if (ap_addr->sa_family != ARPHRD_ETHER)
	468	return -EINVAL;
	469
	470	/* automatic mode */
	471	if (is_zero_ether_addr(bssid) \|\| is_broadcast_ether_addr(bssid))
	472	bssid = NULL;
	473
	474	/* both automatic */
cbe8fa9c	475	if (!bssid && !wdev->wext.ibss.bssid)
04a773ad JB	476	return 0;
	477
	478	/* fixed already - and no change */
cbe8fa9c	479	if (wdev->wext.ibss.bssid && bssid &&
ac422d3c	480	ether_addr_equal(bssid, wdev->wext.ibss.bssid))
04a773ad JB	481	return 0;
04a773ad JB	482
667503dd JB	483	wdev_lock(wdev);
	484	err = 0;
	485	if (wdev->ssid_len)
59bbb6f7	486	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	487	wdev_unlock(wdev);
	488
	489	if (err)
	490	return err;
04a773ad JB	491
04a773ad JB	492	if (bssid) {
cbe8fa9c JB	493	memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
cbe8fa9c JB	494	wdev->wext.ibss.bssid = wdev->wext.bssid;
04a773ad	495	} else
cbe8fa9c	496	wdev->wext.ibss.bssid = NULL;
04a773ad	497
59bbb6f7	498	mutex_lock(&rdev->devlist_mtx);
fffd0934	499	wdev_lock(wdev);
59bbb6f7	500	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934	501	wdev_unlock(wdev);
59bbb6f7	502	mutex_unlock(&rdev->devlist_mtx);
fffd0934 JB	503
fffd0934 JB	504	return err;
04a773ad	505	}
04a773ad JB	506
	507	int cfg80211_ibss_wext_giwap(struct net_device *dev,
	508	struct iw_request_info *info,
	509	struct sockaddr ap_addr, char extra)
	510	{
	511	struct wireless_dev *wdev = dev->ieee80211_ptr;
	512
	513	/* call only for ibss! */
	514	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	515	return -EINVAL;
	516
	517	ap_addr->sa_family = ARPHRD_ETHER;
	518
667503dd	519	wdev_lock(wdev);
7ebbe6bd	520	if (wdev->current_bss)
19957bb3	521	memcpy(ap_addr->sa_data, wdev->current_bss->pub.bssid, ETH_ALEN);
80e5b06a	522	else if (wdev->wext.ibss.bssid)
cbe8fa9c	523	memcpy(ap_addr->sa_data, wdev->wext.ibss.bssid, ETH_ALEN);
80e5b06a ZY	524	else
	525	memset(ap_addr->sa_data, 0, ETH_ALEN);
	526
667503dd JB	527	wdev_unlock(wdev);
667503dd JB	528
04a773ad JB	529	return 0;
04a773ad JB	530	}
04a773ad	531	#endif