[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->wiphy, &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;

	trace_cfg80211_ibss_joined(dev, bssid);

	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->chandef.chan->band];
		int j;
		u32 flag = params->chandef.chan->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.chandef = params->chandef;
#endif

	err = cfg80211_can_use_chan(rdev, wdev, params->chandef.chan,
				    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;
		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;

	ASSERT_RTNL();

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

	return err;
}

static void __cfg80211_clear_ibss(struct net_device *dev, bool nowext)
{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
	int i;

	ASSERT_WDEV_LOCK(wdev);

	kfree(wdev->connect_keys);
	wdev->connect_keys = NULL;

	/*
	 * Delete all the keys ... pairwise keys can't really
	 * exist any more anyway, but default keys might.
	 */
	if (rdev->ops->del_key)
		for (i = 0; i < 6; i++)
			rdev_del_key(rdev, dev, i, false, NULL);

	if (wdev->current_bss) {
		cfg80211_unhold_bss(wdev->current_bss);
		cfg80211_put_bss(wdev->wiphy, &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_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.chandef.chan) {
		wdev->wext.ibss.chandef.width = NL80211_CHAN_WIDTH_20_NOHT;

		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.chandef.chan = chan;
				break;
			}

			if (wdev->wext.ibss.chandef.chan)
				break;
		}

		if (!wdev->wext.ibss.chandef.chan)
			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.chandef.chan == 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.chandef.chan = chan;
		wdev->wext.ibss.chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
		wdev->wext.ibss.channel_fixed = true;
	} else {
		/* cfg80211_ibss_wext_join will pick one if needed */
		wdev->wext.ibss.channel_fixed = false;
	}

	wdev_lock(wdev);
	err = cfg80211_ibss_wext_join(rdev, wdev);
	wdev_unlock(wdev);

	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.chandef.chan)
		chan = wdev->wext.ibss.chandef.chan;
	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;

	wdev_lock(wdev);
	err = cfg80211_ibss_wext_join(rdev, wdev);
	wdev_unlock(wdev);

	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;

	wdev_lock(wdev);
	err = cfg80211_ibss_wext_join(rdev, wdev);
	wdev_unlock(wdev);

	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);
5b112d3d	40	cfg80211_put_bss(wdev->wiphy, &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
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
4ee3e063 BL	64	trace_cfg80211_ibss_joined(dev, bssid);
4ee3e063 BL	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 =
683b6d3b	100	rdev->wiphy.bands[params->chandef.chan->band];
93b05238	101	int j;
683b6d3b	102	u32 flag = params->chandef.chan->band == IEEE80211_BAND_5GHZ ?
93b05238 JB	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
c30a3d38	116	wdev->ibss_fixed = params->channel_fixed;
3d23e349	117	#ifdef CONFIG_CFG80211_WEXT
683b6d3b	118	wdev->wext.ibss.chandef = params->chandef;
04a773ad	119	#endif
e4e32459	120
683b6d3b	121	err = cfg80211_can_use_chan(rdev, wdev, params->chandef.chan,
e4e32459 MK	122	params->channel_fixed
	123	? CHAN_MODE_SHARED
	124	: CHAN_MODE_EXCLUSIVE);
	125	if (err) {
	126	wdev->connect_keys = NULL;
	127	return err;
	128	}
	129
e35e4d28	130	err = rdev_join_ibss(rdev, dev, params);
fffd0934 JB	131	if (err) {
fffd0934 JB	132	wdev->connect_keys = NULL;
04a773ad	133	return err;
fffd0934	134	}
04a773ad JB	135
	136	memcpy(wdev->ssid, params->ssid, params->ssid_len);
	137	wdev->ssid_len = params->ssid_len;
	138
	139	return 0;
	140	}
	141
667503dd JB	142	int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
667503dd JB	143	struct net_device *dev,
fffd0934 JB	144	struct cfg80211_ibss_params *params,
fffd0934 JB	145	struct cfg80211_cached_keys *connkeys)
667503dd JB	146	{
	147	struct wireless_dev *wdev = dev->ieee80211_ptr;
	148	int err;
	149
5fe231e8 JB	150	ASSERT_RTNL();
5fe231e8 JB	151
667503dd	152	wdev_lock(wdev);
fffd0934	153	err = __cfg80211_join_ibss(rdev, dev, params, connkeys);
667503dd JB	154	wdev_unlock(wdev);
	155
	156	return err;
	157	}
	158
	159	static void __cfg80211_clear_ibss(struct net_device *dev, bool nowext)
04a773ad JB	160	{
04a773ad JB	161	struct wireless_dev *wdev = dev->ieee80211_ptr;
fffd0934 JB	162	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
fffd0934 JB	163	int i;
04a773ad	164
667503dd JB	165	ASSERT_WDEV_LOCK(wdev);
667503dd JB	166
fffd0934 JB	167	kfree(wdev->connect_keys);
	168	wdev->connect_keys = NULL;
	169
	170	/*
	171	* Delete all the keys ... pairwise keys can't really
	172	* exist any more anyway, but default keys might.
	173	*/
	174	if (rdev->ops->del_key)
	175	for (i = 0; i < 6; i++)
e35e4d28	176	rdev_del_key(rdev, dev, i, false, NULL);
fffd0934	177
04a773ad JB	178	if (wdev->current_bss) {
04a773ad JB	179	cfg80211_unhold_bss(wdev->current_bss);
5b112d3d	180	cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
04a773ad JB	181	}
	182
	183	wdev->current_bss = NULL;
	184	wdev->ssid_len = 0;
3d23e349	185	#ifdef CONFIG_CFG80211_WEXT
9d308429	186	if (!nowext)
cbe8fa9c	187	wdev->wext.ibss.ssid_len = 0;
9d308429	188	#endif
04a773ad JB	189	}
04a773ad JB	190
667503dd JB	191	void cfg80211_clear_ibss(struct net_device *dev, bool nowext)
	192	{
	193	struct wireless_dev *wdev = dev->ieee80211_ptr;
	194
	195	wdev_lock(wdev);
	196	__cfg80211_clear_ibss(dev, nowext);
	197	wdev_unlock(wdev);
	198	}
	199
98d3a7ca JB	200	int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
98d3a7ca JB	201	struct net_device *dev, bool nowext)
04a773ad	202	{
78485475	203	struct wireless_dev *wdev = dev->ieee80211_ptr;
04a773ad JB	204	int err;
04a773ad JB	205
667503dd JB	206	ASSERT_WDEV_LOCK(wdev);
667503dd JB	207
78485475 JB	208	if (!wdev->ssid_len)
	209	return -ENOLINK;
	210
e35e4d28	211	err = rdev_leave_ibss(rdev, dev);
04a773ad JB	212
	213	if (err)
	214	return err;
	215
667503dd	216	__cfg80211_clear_ibss(dev, nowext);
04a773ad JB	217
	218	return 0;
	219	}
	220
667503dd JB	221	int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
	222	struct net_device *dev, bool nowext)
	223	{
	224	struct wireless_dev *wdev = dev->ieee80211_ptr;
	225	int err;
	226
	227	wdev_lock(wdev);
	228	err = __cfg80211_leave_ibss(rdev, dev, nowext);
	229	wdev_unlock(wdev);
	230
	231	return err;
	232	}
	233
3d23e349	234	#ifdef CONFIG_CFG80211_WEXT
fffd0934 JB	235	int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
fffd0934 JB	236	struct wireless_dev *wdev)
04a773ad	237	{
fffd0934	238	struct cfg80211_cached_keys *ck = NULL;
04a773ad	239	enum ieee80211_band band;
fffd0934 JB	240	int i, err;
	241
	242	ASSERT_WDEV_LOCK(wdev);
04a773ad	243
cbe8fa9c JB	244	if (!wdev->wext.ibss.beacon_interval)
cbe8fa9c JB	245	wdev->wext.ibss.beacon_interval = 100;
8e30bc55	246
04a773ad	247	/* try to find an IBSS channel if none requested ... */
683b6d3b	248	if (!wdev->wext.ibss.chandef.chan) {
3d9d1d66	249	wdev->wext.ibss.chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
683b6d3b	250
04a773ad JB	251	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
	252	struct ieee80211_supported_band *sband;
	253	struct ieee80211_channel *chan;
	254
	255	sband = rdev->wiphy.bands[band];
	256	if (!sband)
	257	continue;
	258
	259	for (i = 0; i < sband->n_channels; i++) {
	260	chan = &sband->channels[i];
	261	if (chan->flags & IEEE80211_CHAN_NO_IBSS)
	262	continue;
	263	if (chan->flags & IEEE80211_CHAN_DISABLED)
	264	continue;
683b6d3b	265	wdev->wext.ibss.chandef.chan = chan;
04a773ad JB	266	break;
	267	}
	268
683b6d3b	269	if (wdev->wext.ibss.chandef.chan)
04a773ad JB	270	break;
	271	}
	272
683b6d3b	273	if (!wdev->wext.ibss.chandef.chan)
04a773ad JB	274	return -EINVAL;
	275	}
	276
	277	/* don't join -- SSID is not there */
cbe8fa9c	278	if (!wdev->wext.ibss.ssid_len)
04a773ad JB	279	return 0;
	280
	281	if (!netif_running(wdev->netdev))
	282	return 0;
	283
3be61a38	284	if (wdev->wext.keys) {
fffd0934	285	wdev->wext.keys->def = wdev->wext.default_key;
3be61a38 JB	286	wdev->wext.keys->defmgmt = wdev->wext.default_mgmt_key;
3be61a38 JB	287	}
fffd0934 JB	288
	289	wdev->wext.ibss.privacy = wdev->wext.default_key != -1;
	290
	291	if (wdev->wext.keys) {
	292	ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL);
	293	if (!ck)
	294	return -ENOMEM;
	295	for (i = 0; i < 6; i++)
	296	ck->params[i].key = ck->data[i];
	297	}
	298	err = __cfg80211_join_ibss(rdev, wdev->netdev,
	299	&wdev->wext.ibss, ck);
	300	if (err)
	301	kfree(ck);
	302
	303	return err;
04a773ad JB	304	}
	305
	306	int cfg80211_ibss_wext_siwfreq(struct net_device *dev,
	307	struct iw_request_info *info,
59bbb6f7	308	struct iw_freq wextfreq, char extra)
04a773ad JB	309	{
04a773ad JB	310	struct wireless_dev *wdev = dev->ieee80211_ptr;
59bbb6f7 JB	311	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
	312	struct ieee80211_channel *chan = NULL;
	313	int err, freq;
04a773ad JB	314
	315	/* call only for ibss! */
	316	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	317	return -EINVAL;
	318
59bbb6f7	319	if (!rdev->ops->join_ibss)
04a773ad JB	320	return -EOPNOTSUPP;
04a773ad JB	321
59bbb6f7 JB	322	freq = cfg80211_wext_freq(wdev->wiphy, wextfreq);
	323	if (freq < 0)
	324	return freq;
04a773ad	325
59bbb6f7 JB	326	if (freq) {
	327	chan = ieee80211_get_channel(wdev->wiphy, freq);
	328	if (!chan)
	329	return -EINVAL;
	330	if (chan->flags & IEEE80211_CHAN_NO_IBSS \|\|
	331	chan->flags & IEEE80211_CHAN_DISABLED)
	332	return -EINVAL;
	333	}
04a773ad	334
683b6d3b	335	if (wdev->wext.ibss.chandef.chan == chan)
04a773ad JB	336	return 0;
04a773ad JB	337
667503dd JB	338	wdev_lock(wdev);
	339	err = 0;
	340	if (wdev->ssid_len)
59bbb6f7	341	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	342	wdev_unlock(wdev);
	343
	344	if (err)
	345	return err;
04a773ad JB	346
04a773ad JB	347	if (chan) {
683b6d3b	348	wdev->wext.ibss.chandef.chan = chan;
3d9d1d66	349	wdev->wext.ibss.chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
cbe8fa9c	350	wdev->wext.ibss.channel_fixed = true;
04a773ad JB	351	} else {
04a773ad JB	352	/* cfg80211_ibss_wext_join will pick one if needed */
cbe8fa9c	353	wdev->wext.ibss.channel_fixed = false;
04a773ad JB	354	}
04a773ad JB	355
fffd0934	356	wdev_lock(wdev);
59bbb6f7	357	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934 JB	358	wdev_unlock(wdev);
	359
	360	return err;
04a773ad	361	}
04a773ad JB	362
	363	int cfg80211_ibss_wext_giwfreq(struct net_device *dev,
	364	struct iw_request_info *info,
	365	struct iw_freq freq, char extra)
	366	{
	367	struct wireless_dev *wdev = dev->ieee80211_ptr;
	368	struct ieee80211_channel *chan = NULL;
	369
	370	/* call only for ibss! */
	371	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	372	return -EINVAL;
	373
667503dd	374	wdev_lock(wdev);
04a773ad	375	if (wdev->current_bss)
19957bb3	376	chan = wdev->current_bss->pub.channel;
683b6d3b JB	377	else if (wdev->wext.ibss.chandef.chan)
683b6d3b JB	378	chan = wdev->wext.ibss.chandef.chan;
667503dd	379	wdev_unlock(wdev);
04a773ad JB	380
	381	if (chan) {
	382	freq->m = chan->center_freq;
	383	freq->e = 6;
	384	return 0;
	385	}
	386
	387	/* no channel if not joining */
	388	return -EINVAL;
	389	}
04a773ad JB	390
	391	int cfg80211_ibss_wext_siwessid(struct net_device *dev,
	392	struct iw_request_info *info,
	393	struct iw_point data, char ssid)
	394	{
	395	struct wireless_dev *wdev = dev->ieee80211_ptr;
59bbb6f7	396	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
04a773ad JB	397	size_t len = data->length;
	398	int err;
	399
	400	/* call only for ibss! */
	401	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	402	return -EINVAL;
	403
59bbb6f7	404	if (!rdev->ops->join_ibss)
04a773ad JB	405	return -EOPNOTSUPP;
04a773ad JB	406
667503dd JB	407	wdev_lock(wdev);
	408	err = 0;
	409	if (wdev->ssid_len)
59bbb6f7	410	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	411	wdev_unlock(wdev);
	412
	413	if (err)
	414	return err;
04a773ad JB	415
	416	/* iwconfig uses nul termination in SSID.. */
	417	if (len > 0 && ssid[len - 1] == '\0')
	418	len--;
	419
cbe8fa9c JB	420	wdev->wext.ibss.ssid = wdev->ssid;
	421	memcpy(wdev->wext.ibss.ssid, ssid, len);
	422	wdev->wext.ibss.ssid_len = len;
04a773ad	423
fffd0934	424	wdev_lock(wdev);
59bbb6f7	425	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934 JB	426	wdev_unlock(wdev);
	427
	428	return err;
04a773ad	429	}
04a773ad JB	430
	431	int cfg80211_ibss_wext_giwessid(struct net_device *dev,
	432	struct iw_request_info *info,
	433	struct iw_point data, char ssid)
	434	{
	435	struct wireless_dev *wdev = dev->ieee80211_ptr;
	436
	437	/* call only for ibss! */
	438	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	439	return -EINVAL;
	440
	441	data->flags = 0;
	442
667503dd	443	wdev_lock(wdev);
04a773ad JB	444	if (wdev->ssid_len) {
	445	data->flags = 1;
	446	data->length = wdev->ssid_len;
	447	memcpy(ssid, wdev->ssid, data->length);
cbe8fa9c	448	} else if (wdev->wext.ibss.ssid && wdev->wext.ibss.ssid_len) {
04a773ad	449	data->flags = 1;
cbe8fa9c JB	450	data->length = wdev->wext.ibss.ssid_len;
cbe8fa9c JB	451	memcpy(ssid, wdev->wext.ibss.ssid, data->length);
04a773ad	452	}
667503dd	453	wdev_unlock(wdev);
04a773ad JB	454
	455	return 0;
	456	}
04a773ad JB	457
	458	int cfg80211_ibss_wext_siwap(struct net_device *dev,
	459	struct iw_request_info *info,
	460	struct sockaddr ap_addr, char extra)
	461	{
	462	struct wireless_dev *wdev = dev->ieee80211_ptr;
59bbb6f7	463	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
04a773ad JB	464	u8 *bssid = ap_addr->sa_data;
	465	int err;
	466
	467	/* call only for ibss! */
	468	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	469	return -EINVAL;
	470
59bbb6f7	471	if (!rdev->ops->join_ibss)
04a773ad JB	472	return -EOPNOTSUPP;
	473
	474	if (ap_addr->sa_family != ARPHRD_ETHER)
	475	return -EINVAL;
	476
	477	/* automatic mode */
	478	if (is_zero_ether_addr(bssid) \|\| is_broadcast_ether_addr(bssid))
	479	bssid = NULL;
	480
	481	/* both automatic */
cbe8fa9c	482	if (!bssid && !wdev->wext.ibss.bssid)
04a773ad JB	483	return 0;
	484
	485	/* fixed already - and no change */
cbe8fa9c	486	if (wdev->wext.ibss.bssid && bssid &&
ac422d3c	487	ether_addr_equal(bssid, wdev->wext.ibss.bssid))
04a773ad JB	488	return 0;
04a773ad JB	489
667503dd JB	490	wdev_lock(wdev);
	491	err = 0;
	492	if (wdev->ssid_len)
59bbb6f7	493	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	494	wdev_unlock(wdev);
	495
	496	if (err)
	497	return err;
04a773ad JB	498
04a773ad JB	499	if (bssid) {
cbe8fa9c JB	500	memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
cbe8fa9c JB	501	wdev->wext.ibss.bssid = wdev->wext.bssid;
04a773ad	502	} else
cbe8fa9c	503	wdev->wext.ibss.bssid = NULL;
04a773ad	504
fffd0934	505	wdev_lock(wdev);
59bbb6f7	506	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934 JB	507	wdev_unlock(wdev);
	508
	509	return err;
04a773ad	510	}
04a773ad JB	511
	512	int cfg80211_ibss_wext_giwap(struct net_device *dev,
	513	struct iw_request_info *info,
	514	struct sockaddr ap_addr, char extra)
	515	{
	516	struct wireless_dev *wdev = dev->ieee80211_ptr;
	517
	518	/* call only for ibss! */
	519	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	520	return -EINVAL;
	521
	522	ap_addr->sa_family = ARPHRD_ETHER;
	523
667503dd	524	wdev_lock(wdev);
7ebbe6bd	525	if (wdev->current_bss)
19957bb3	526	memcpy(ap_addr->sa_data, wdev->current_bss->pub.bssid, ETH_ALEN);
80e5b06a	527	else if (wdev->wext.ibss.bssid)
cbe8fa9c	528	memcpy(ap_addr->sa_data, wdev->wext.ibss.bssid, ETH_ALEN);
80e5b06a ZY	529	else
	530	memset(ap_addr->sa_data, 0, ETH_ALEN);
	531
667503dd JB	532	wdev_unlock(wdev);
667503dd JB	533
04a773ad JB	534	return 0;
04a773ad JB	535	}
04a773ad	536	#endif