[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"
#include "rdev-ops.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;

	trace_cfg80211_ibss_joined(dev, bssid);

	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;

	wdev->ibss_fixed = params->channel_fixed;
#ifdef CONFIG_CFG80211_WEXT
	wdev->wext.ibss.channel = params->channel;
#endif
	wdev->sme_state = CFG80211_SME_CONNECTING;

	err = cfg80211_can_use_chan(rdev, wdev, params->channel,
				    params->channel_fixed
				    ? CHAN_MODE_SHARED
				    : CHAN_MODE_EXCLUSIVE);
	if (err) {
		wdev->connect_keys = NULL;
		return err;
	}

	err = rdev_join_ibss(rdev, 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_del_key(rdev, 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_leave_ibss(rdev, 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	13	#include "nl80211.h"
e35e4d28	14	#include "rdev-ops.h"
04a773ad JB	15
04a773ad JB	16
667503dd	17	void __cfg80211_ibss_joined(struct net_device dev, const u8 bssid)
04a773ad JB	18	{
	19	struct wireless_dev *wdev = dev->ieee80211_ptr;
	20	struct cfg80211_bss *bss;
3d23e349	21	#ifdef CONFIG_CFG80211_WEXT
04a773ad JB	22	union iwreq_data wrqu;
	23	#endif
	24
	25	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	26	return;
	27
f7969969	28	if (!wdev->ssid_len)
04a773ad JB	29	return;
04a773ad JB	30
04a773ad JB	31	bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
	32	wdev->ssid, wdev->ssid_len,
	33	WLAN_CAPABILITY_IBSS, WLAN_CAPABILITY_IBSS);
	34
	35	if (WARN_ON(!bss))
	36	return;
	37
	38	if (wdev->current_bss) {
	39	cfg80211_unhold_bss(wdev->current_bss);
19957bb3	40	cfg80211_put_bss(&wdev->current_bss->pub);
04a773ad JB	41	}
04a773ad JB	42
19957bb3 JB	43	cfg80211_hold_bss(bss_from_pub(bss));
19957bb3 JB	44	wdev->current_bss = bss_from_pub(bss);
04a773ad	45
28f33366	46	wdev->sme_state = CFG80211_SME_CONNECTED;
fffd0934 JB	47	cfg80211_upload_connect_keys(wdev);
fffd0934 JB	48
667503dd JB	49	nl80211_send_ibss_bssid(wiphy_to_dev(wdev->wiphy), dev, bssid,
667503dd JB	50	GFP_KERNEL);
3d23e349	51	#ifdef CONFIG_CFG80211_WEXT
04a773ad JB	52	memset(&wrqu, 0, sizeof(wrqu));
	53	memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
	54	wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
	55	#endif
	56	}
667503dd JB	57
	58	void cfg80211_ibss_joined(struct net_device dev, const u8 bssid, gfp_t gfp)
	59	{
	60	struct wireless_dev *wdev = dev->ieee80211_ptr;
	61	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
	62	struct cfg80211_event *ev;
	63	unsigned long flags;
	64
4ee3e063 BL	65	trace_cfg80211_ibss_joined(dev, bssid);
4ee3e063 BL	66
28f33366	67	CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTING);
f7969969	68
667503dd JB	69	ev = kzalloc(sizeof(*ev), gfp);
	70	if (!ev)
	71	return;
	72
	73	ev->type = EVENT_IBSS_JOINED;
	74	memcpy(ev->cr.bssid, bssid, ETH_ALEN);
	75
	76	spin_lock_irqsave(&wdev->event_lock, flags);
	77	list_add_tail(&ev->list, &wdev->event_list);
	78	spin_unlock_irqrestore(&wdev->event_lock, flags);
e60d7443	79	queue_work(cfg80211_wq, &rdev->event_work);
667503dd	80	}
04a773ad JB	81	EXPORT_SYMBOL(cfg80211_ibss_joined);
04a773ad JB	82
667503dd JB	83	int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
667503dd JB	84	struct net_device *dev,
fffd0934 JB	85	struct cfg80211_ibss_params *params,
fffd0934 JB	86	struct cfg80211_cached_keys *connkeys)
04a773ad JB	87	{
	88	struct wireless_dev *wdev = dev->ieee80211_ptr;
	89	int err;
	90
667503dd JB	91	ASSERT_WDEV_LOCK(wdev);
667503dd JB	92
04a773ad JB	93	if (wdev->ssid_len)
	94	return -EALREADY;
	95
93b05238 JB	96	if (!params->basic_rates) {
	97	/*
	98	* If no rates were explicitly configured,
	99	* use the mandatory rate set for 11b or
	100	* 11a for maximum compatibility.
	101	*/
	102	struct ieee80211_supported_band *sband =
	103	rdev->wiphy.bands[params->channel->band];
	104	int j;
	105	u32 flag = params->channel->band == IEEE80211_BAND_5GHZ ?
	106	IEEE80211_RATE_MANDATORY_A :
	107	IEEE80211_RATE_MANDATORY_B;
	108
	109	for (j = 0; j < sband->n_bitrates; j++) {
	110	if (sband->bitrates[j].flags & flag)
	111	params->basic_rates \|= BIT(j);
	112	}
	113	}
	114
fffd0934 JB	115	if (WARN_ON(wdev->connect_keys))
	116	kfree(wdev->connect_keys);
	117	wdev->connect_keys = connkeys;
	118
c30a3d38	119	wdev->ibss_fixed = params->channel_fixed;
3d23e349	120	#ifdef CONFIG_CFG80211_WEXT
cbe8fa9c	121	wdev->wext.ibss.channel = params->channel;
04a773ad	122	#endif
28f33366	123	wdev->sme_state = CFG80211_SME_CONNECTING;
e4e32459 MK	124
	125	err = cfg80211_can_use_chan(rdev, wdev, params->channel,
	126	params->channel_fixed
	127	? CHAN_MODE_SHARED
	128	: CHAN_MODE_EXCLUSIVE);
	129	if (err) {
	130	wdev->connect_keys = NULL;
	131	return err;
	132	}
	133
e35e4d28	134	err = rdev_join_ibss(rdev, dev, params);
fffd0934 JB	135	if (err) {
fffd0934 JB	136	wdev->connect_keys = NULL;
28f33366	137	wdev->sme_state = CFG80211_SME_IDLE;
04a773ad	138	return err;
fffd0934	139	}
04a773ad JB	140
	141	memcpy(wdev->ssid, params->ssid, params->ssid_len);
	142	wdev->ssid_len = params->ssid_len;
	143
	144	return 0;
	145	}
	146
667503dd JB	147	int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
667503dd JB	148	struct net_device *dev,
fffd0934 JB	149	struct cfg80211_ibss_params *params,
fffd0934 JB	150	struct cfg80211_cached_keys *connkeys)
667503dd JB	151	{
	152	struct wireless_dev *wdev = dev->ieee80211_ptr;
	153	int err;
	154
59bbb6f7	155	mutex_lock(&rdev->devlist_mtx);
667503dd	156	wdev_lock(wdev);
fffd0934	157	err = __cfg80211_join_ibss(rdev, dev, params, connkeys);
667503dd	158	wdev_unlock(wdev);
59bbb6f7	159	mutex_unlock(&rdev->devlist_mtx);
667503dd JB	160
	161	return err;
	162	}
	163
	164	static void __cfg80211_clear_ibss(struct net_device *dev, bool nowext)
04a773ad JB	165	{
04a773ad JB	166	struct wireless_dev *wdev = dev->ieee80211_ptr;
fffd0934 JB	167	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
fffd0934 JB	168	int i;
04a773ad	169
667503dd JB	170	ASSERT_WDEV_LOCK(wdev);
667503dd JB	171
fffd0934 JB	172	kfree(wdev->connect_keys);
	173	wdev->connect_keys = NULL;
	174
	175	/*
	176	* Delete all the keys ... pairwise keys can't really
	177	* exist any more anyway, but default keys might.
	178	*/
	179	if (rdev->ops->del_key)
	180	for (i = 0; i < 6; i++)
e35e4d28	181	rdev_del_key(rdev, dev, i, false, NULL);
fffd0934	182
04a773ad JB	183	if (wdev->current_bss) {
04a773ad JB	184	cfg80211_unhold_bss(wdev->current_bss);
19957bb3	185	cfg80211_put_bss(&wdev->current_bss->pub);
04a773ad JB	186	}
	187
	188	wdev->current_bss = NULL;
28f33366	189	wdev->sme_state = CFG80211_SME_IDLE;
04a773ad	190	wdev->ssid_len = 0;
3d23e349	191	#ifdef CONFIG_CFG80211_WEXT
9d308429	192	if (!nowext)
cbe8fa9c	193	wdev->wext.ibss.ssid_len = 0;
9d308429	194	#endif
04a773ad JB	195	}
04a773ad JB	196
667503dd JB	197	void cfg80211_clear_ibss(struct net_device *dev, bool nowext)
	198	{
	199	struct wireless_dev *wdev = dev->ieee80211_ptr;
	200
	201	wdev_lock(wdev);
	202	__cfg80211_clear_ibss(dev, nowext);
	203	wdev_unlock(wdev);
	204	}
	205
98d3a7ca JB	206	int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
98d3a7ca JB	207	struct net_device *dev, bool nowext)
04a773ad	208	{
78485475	209	struct wireless_dev *wdev = dev->ieee80211_ptr;
04a773ad JB	210	int err;
04a773ad JB	211
667503dd JB	212	ASSERT_WDEV_LOCK(wdev);
667503dd JB	213
78485475 JB	214	if (!wdev->ssid_len)
	215	return -ENOLINK;
	216
e35e4d28	217	err = rdev_leave_ibss(rdev, dev);
04a773ad JB	218
	219	if (err)
	220	return err;
	221
667503dd	222	__cfg80211_clear_ibss(dev, nowext);
04a773ad JB	223
	224	return 0;
	225	}
	226
667503dd JB	227	int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
	228	struct net_device *dev, bool nowext)
	229	{
	230	struct wireless_dev *wdev = dev->ieee80211_ptr;
	231	int err;
	232
	233	wdev_lock(wdev);
	234	err = __cfg80211_leave_ibss(rdev, dev, nowext);
	235	wdev_unlock(wdev);
	236
	237	return err;
	238	}
	239
3d23e349	240	#ifdef CONFIG_CFG80211_WEXT
fffd0934 JB	241	int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
fffd0934 JB	242	struct wireless_dev *wdev)
04a773ad	243	{
fffd0934	244	struct cfg80211_cached_keys *ck = NULL;
04a773ad	245	enum ieee80211_band band;
fffd0934 JB	246	int i, err;
	247
	248	ASSERT_WDEV_LOCK(wdev);
04a773ad	249
cbe8fa9c JB	250	if (!wdev->wext.ibss.beacon_interval)
cbe8fa9c JB	251	wdev->wext.ibss.beacon_interval = 100;
8e30bc55	252
04a773ad	253	/* try to find an IBSS channel if none requested ... */
cbe8fa9c	254	if (!wdev->wext.ibss.channel) {
04a773ad JB	255	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
	256	struct ieee80211_supported_band *sband;
	257	struct ieee80211_channel *chan;
	258
	259	sband = rdev->wiphy.bands[band];
	260	if (!sband)
	261	continue;
	262
	263	for (i = 0; i < sband->n_channels; i++) {
	264	chan = &sband->channels[i];
	265	if (chan->flags & IEEE80211_CHAN_NO_IBSS)
	266	continue;
	267	if (chan->flags & IEEE80211_CHAN_DISABLED)
	268	continue;
cbe8fa9c	269	wdev->wext.ibss.channel = chan;
04a773ad JB	270	break;
	271	}
	272
cbe8fa9c	273	if (wdev->wext.ibss.channel)
04a773ad JB	274	break;
	275	}
	276
cbe8fa9c	277	if (!wdev->wext.ibss.channel)
04a773ad JB	278	return -EINVAL;
	279	}
	280
	281	/* don't join -- SSID is not there */
cbe8fa9c	282	if (!wdev->wext.ibss.ssid_len)
04a773ad JB	283	return 0;
	284
	285	if (!netif_running(wdev->netdev))
	286	return 0;
	287
3be61a38	288	if (wdev->wext.keys) {
fffd0934	289	wdev->wext.keys->def = wdev->wext.default_key;
3be61a38 JB	290	wdev->wext.keys->defmgmt = wdev->wext.default_mgmt_key;
3be61a38 JB	291	}
fffd0934 JB	292
	293	wdev->wext.ibss.privacy = wdev->wext.default_key != -1;
	294
	295	if (wdev->wext.keys) {
	296	ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL);
	297	if (!ck)
	298	return -ENOMEM;
	299	for (i = 0; i < 6; i++)
	300	ck->params[i].key = ck->data[i];
	301	}
	302	err = __cfg80211_join_ibss(rdev, wdev->netdev,
	303	&wdev->wext.ibss, ck);
	304	if (err)
	305	kfree(ck);
	306
	307	return err;
04a773ad JB	308	}
	309
	310	int cfg80211_ibss_wext_siwfreq(struct net_device *dev,
	311	struct iw_request_info *info,
59bbb6f7	312	struct iw_freq wextfreq, char extra)
04a773ad JB	313	{
04a773ad JB	314	struct wireless_dev *wdev = dev->ieee80211_ptr;
59bbb6f7 JB	315	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
	316	struct ieee80211_channel *chan = NULL;
	317	int err, freq;
04a773ad JB	318
	319	/* call only for ibss! */
	320	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	321	return -EINVAL;
	322
59bbb6f7	323	if (!rdev->ops->join_ibss)
04a773ad JB	324	return -EOPNOTSUPP;
04a773ad JB	325
59bbb6f7 JB	326	freq = cfg80211_wext_freq(wdev->wiphy, wextfreq);
	327	if (freq < 0)
	328	return freq;
04a773ad	329
59bbb6f7 JB	330	if (freq) {
	331	chan = ieee80211_get_channel(wdev->wiphy, freq);
	332	if (!chan)
	333	return -EINVAL;
	334	if (chan->flags & IEEE80211_CHAN_NO_IBSS \|\|
	335	chan->flags & IEEE80211_CHAN_DISABLED)
	336	return -EINVAL;
	337	}
04a773ad	338
cbe8fa9c	339	if (wdev->wext.ibss.channel == chan)
04a773ad JB	340	return 0;
04a773ad JB	341
667503dd JB	342	wdev_lock(wdev);
	343	err = 0;
	344	if (wdev->ssid_len)
59bbb6f7	345	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	346	wdev_unlock(wdev);
	347
	348	if (err)
	349	return err;
04a773ad JB	350
04a773ad JB	351	if (chan) {
cbe8fa9c JB	352	wdev->wext.ibss.channel = chan;
cbe8fa9c JB	353	wdev->wext.ibss.channel_fixed = true;
04a773ad JB	354	} else {
04a773ad JB	355	/* cfg80211_ibss_wext_join will pick one if needed */
cbe8fa9c	356	wdev->wext.ibss.channel_fixed = false;
04a773ad JB	357	}
04a773ad JB	358
59bbb6f7	359	mutex_lock(&rdev->devlist_mtx);
fffd0934	360	wdev_lock(wdev);
59bbb6f7	361	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934	362	wdev_unlock(wdev);
59bbb6f7	363	mutex_unlock(&rdev->devlist_mtx);
fffd0934 JB	364
fffd0934 JB	365	return err;
04a773ad	366	}
04a773ad JB	367
	368	int cfg80211_ibss_wext_giwfreq(struct net_device *dev,
	369	struct iw_request_info *info,
	370	struct iw_freq freq, char extra)
	371	{
	372	struct wireless_dev *wdev = dev->ieee80211_ptr;
	373	struct ieee80211_channel *chan = NULL;
	374
	375	/* call only for ibss! */
	376	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	377	return -EINVAL;
	378
667503dd	379	wdev_lock(wdev);
04a773ad	380	if (wdev->current_bss)
19957bb3	381	chan = wdev->current_bss->pub.channel;
cbe8fa9c JB	382	else if (wdev->wext.ibss.channel)
cbe8fa9c JB	383	chan = wdev->wext.ibss.channel;
667503dd	384	wdev_unlock(wdev);
04a773ad JB	385
	386	if (chan) {
	387	freq->m = chan->center_freq;
	388	freq->e = 6;
	389	return 0;
	390	}
	391
	392	/* no channel if not joining */
	393	return -EINVAL;
	394	}
04a773ad JB	395
	396	int cfg80211_ibss_wext_siwessid(struct net_device *dev,
	397	struct iw_request_info *info,
	398	struct iw_point data, char ssid)
	399	{
	400	struct wireless_dev *wdev = dev->ieee80211_ptr;
59bbb6f7	401	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
04a773ad JB	402	size_t len = data->length;
	403	int err;
	404
	405	/* call only for ibss! */
	406	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	407	return -EINVAL;
	408
59bbb6f7	409	if (!rdev->ops->join_ibss)
04a773ad JB	410	return -EOPNOTSUPP;
04a773ad JB	411
667503dd JB	412	wdev_lock(wdev);
	413	err = 0;
	414	if (wdev->ssid_len)
59bbb6f7	415	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	416	wdev_unlock(wdev);
	417
	418	if (err)
	419	return err;
04a773ad JB	420
	421	/* iwconfig uses nul termination in SSID.. */
	422	if (len > 0 && ssid[len - 1] == '\0')
	423	len--;
	424
cbe8fa9c JB	425	wdev->wext.ibss.ssid = wdev->ssid;
	426	memcpy(wdev->wext.ibss.ssid, ssid, len);
	427	wdev->wext.ibss.ssid_len = len;
04a773ad	428
59bbb6f7	429	mutex_lock(&rdev->devlist_mtx);
fffd0934	430	wdev_lock(wdev);
59bbb6f7	431	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934	432	wdev_unlock(wdev);
59bbb6f7	433	mutex_unlock(&rdev->devlist_mtx);
fffd0934 JB	434
fffd0934 JB	435	return err;
04a773ad	436	}
04a773ad JB	437
	438	int cfg80211_ibss_wext_giwessid(struct net_device *dev,
	439	struct iw_request_info *info,
	440	struct iw_point data, char ssid)
	441	{
	442	struct wireless_dev *wdev = dev->ieee80211_ptr;
	443
	444	/* call only for ibss! */
	445	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	446	return -EINVAL;
	447
	448	data->flags = 0;
	449
667503dd	450	wdev_lock(wdev);
04a773ad JB	451	if (wdev->ssid_len) {
	452	data->flags = 1;
	453	data->length = wdev->ssid_len;
	454	memcpy(ssid, wdev->ssid, data->length);
cbe8fa9c	455	} else if (wdev->wext.ibss.ssid && wdev->wext.ibss.ssid_len) {
04a773ad	456	data->flags = 1;
cbe8fa9c JB	457	data->length = wdev->wext.ibss.ssid_len;
cbe8fa9c JB	458	memcpy(ssid, wdev->wext.ibss.ssid, data->length);
04a773ad	459	}
667503dd	460	wdev_unlock(wdev);
04a773ad JB	461
	462	return 0;
	463	}
04a773ad JB	464
	465	int cfg80211_ibss_wext_siwap(struct net_device *dev,
	466	struct iw_request_info *info,
	467	struct sockaddr ap_addr, char extra)
	468	{
	469	struct wireless_dev *wdev = dev->ieee80211_ptr;
59bbb6f7	470	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
04a773ad JB	471	u8 *bssid = ap_addr->sa_data;
	472	int err;
	473
	474	/* call only for ibss! */
	475	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	476	return -EINVAL;
	477
59bbb6f7	478	if (!rdev->ops->join_ibss)
04a773ad JB	479	return -EOPNOTSUPP;
	480
	481	if (ap_addr->sa_family != ARPHRD_ETHER)
	482	return -EINVAL;
	483
	484	/* automatic mode */
	485	if (is_zero_ether_addr(bssid) \|\| is_broadcast_ether_addr(bssid))
	486	bssid = NULL;
	487
	488	/* both automatic */
cbe8fa9c	489	if (!bssid && !wdev->wext.ibss.bssid)
04a773ad JB	490	return 0;
	491
	492	/* fixed already - and no change */
cbe8fa9c	493	if (wdev->wext.ibss.bssid && bssid &&
ac422d3c	494	ether_addr_equal(bssid, wdev->wext.ibss.bssid))
04a773ad JB	495	return 0;
04a773ad JB	496
667503dd JB	497	wdev_lock(wdev);
	498	err = 0;
	499	if (wdev->ssid_len)
59bbb6f7	500	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	501	wdev_unlock(wdev);
	502
	503	if (err)
	504	return err;
04a773ad JB	505
04a773ad JB	506	if (bssid) {
cbe8fa9c JB	507	memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
cbe8fa9c JB	508	wdev->wext.ibss.bssid = wdev->wext.bssid;
04a773ad	509	} else
cbe8fa9c	510	wdev->wext.ibss.bssid = NULL;
04a773ad	511
59bbb6f7	512	mutex_lock(&rdev->devlist_mtx);
fffd0934	513	wdev_lock(wdev);
59bbb6f7	514	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934	515	wdev_unlock(wdev);
59bbb6f7	516	mutex_unlock(&rdev->devlist_mtx);
fffd0934 JB	517
fffd0934 JB	518	return err;
04a773ad	519	}
04a773ad JB	520
	521	int cfg80211_ibss_wext_giwap(struct net_device *dev,
	522	struct iw_request_info *info,
	523	struct sockaddr ap_addr, char extra)
	524	{
	525	struct wireless_dev *wdev = dev->ieee80211_ptr;
	526
	527	/* call only for ibss! */
	528	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	529	return -EINVAL;
	530
	531	ap_addr->sa_family = ARPHRD_ETHER;
	532
667503dd	533	wdev_lock(wdev);
7ebbe6bd	534	if (wdev->current_bss)
19957bb3	535	memcpy(ap_addr->sa_data, wdev->current_bss->pub.bssid, ETH_ALEN);
80e5b06a	536	else if (wdev->wext.ibss.bssid)
cbe8fa9c	537	memcpy(ap_addr->sa_data, wdev->wext.ibss.bssid, ETH_ALEN);
80e5b06a ZY	538	else
	539	memset(ap_addr->sa_data, 0, ETH_ALEN);
	540
667503dd JB	541	wdev_unlock(wdev);
667503dd JB	542
04a773ad JB	543	return 0;
04a773ad JB	544	}
04a773ad	545	#endif