[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;
	struct ieee80211_channel *check_chan;
	u8 radar_detect_width = 0;
	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;
	wdev->ibss_dfs_possible = params->userspace_handles_dfs;
#ifdef CONFIG_CFG80211_WEXT
	wdev->wext.ibss.chandef = params->chandef;
#endif
	check_chan = params->chandef.chan;
	if (params->userspace_handles_dfs) {
		/* use channel NULL to check for radar even if the current
		 * channel is not a radar channel - it might decide to change
		 * to DFS channel later.
		 */
		radar_detect_width = BIT(params->chandef.width);
		check_chan = NULL;
	}

	err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
					   check_chan,
					   (params->channel_fixed &&
					    !radar_detect_width)
					   ? CHAN_MODE_SHARED
					   : CHAN_MODE_EXCLUSIVE,
					   radar_detect_width);

	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) {
		struct ieee80211_channel *new_chan = NULL;

		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_IR)
					continue;
				if (chan->flags & IEEE80211_CHAN_DISABLED)
					continue;
				new_chan = chan;
				break;
			}

			if (new_chan)
				break;
		}

		if (!new_chan)
			return -EINVAL;

		cfg80211_chandef_create(&wdev->wext.ibss.chandef, new_chan,
					NL80211_CHAN_NO_HT);
	}

	/* 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_IR ||
		    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) {
		cfg80211_chandef_create(&wdev->wext.ibss.chandef, chan,
					NL80211_CHAN_NO_HT);
		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	{
04a773ad JB	85	struct wireless_dev *wdev = dev->ieee80211_ptr;
5336fa88 SW	86	struct ieee80211_channel *check_chan;
5336fa88 SW	87	u8 radar_detect_width = 0;
04a773ad JB	88	int err;
04a773ad JB	89
667503dd JB	90	ASSERT_WDEV_LOCK(wdev);
667503dd JB	91
04a773ad JB	92	if (wdev->ssid_len)
	93	return -EALREADY;
	94
93b05238 JB	95	if (!params->basic_rates) {
	96	/*
	97	* If no rates were explicitly configured,
	98	* use the mandatory rate set for 11b or
	99	* 11a for maximum compatibility.
	100	*/
	101	struct ieee80211_supported_band *sband =
683b6d3b	102	rdev->wiphy.bands[params->chandef.chan->band];
93b05238	103	int j;
683b6d3b	104	u32 flag = params->chandef.chan->band == IEEE80211_BAND_5GHZ ?
93b05238 JB	105	IEEE80211_RATE_MANDATORY_A :
	106	IEEE80211_RATE_MANDATORY_B;
	107
	108	for (j = 0; j < sband->n_bitrates; j++) {
	109	if (sband->bitrates[j].flags & flag)
	110	params->basic_rates \|= BIT(j);
	111	}
	112	}
	113
fffd0934 JB	114	if (WARN_ON(wdev->connect_keys))
	115	kfree(wdev->connect_keys);
	116	wdev->connect_keys = connkeys;
	117
c30a3d38	118	wdev->ibss_fixed = params->channel_fixed;
5336fa88	119	wdev->ibss_dfs_possible = params->userspace_handles_dfs;
3d23e349	120	#ifdef CONFIG_CFG80211_WEXT
683b6d3b	121	wdev->wext.ibss.chandef = params->chandef;
04a773ad	122	#endif
5336fa88 SW	123	check_chan = params->chandef.chan;
	124	if (params->userspace_handles_dfs) {
	125	/* use channel NULL to check for radar even if the current
	126	* channel is not a radar channel - it might decide to change
	127	* to DFS channel later.
	128	*/
	129	radar_detect_width = BIT(params->chandef.width);
	130	check_chan = NULL;
	131	}
	132
	133	err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
	134	check_chan,
	135	(params->channel_fixed &&
	136	!radar_detect_width)
	137	? CHAN_MODE_SHARED
	138	: CHAN_MODE_EXCLUSIVE,
	139	radar_detect_width);
e4e32459	140
e4e32459 MK	141	if (err) {
	142	wdev->connect_keys = NULL;
	143	return err;
	144	}
	145
e35e4d28	146	err = rdev_join_ibss(rdev, dev, params);
fffd0934 JB	147	if (err) {
fffd0934 JB	148	wdev->connect_keys = NULL;
04a773ad	149	return err;
fffd0934	150	}
04a773ad JB	151
	152	memcpy(wdev->ssid, params->ssid, params->ssid_len);
	153	wdev->ssid_len = params->ssid_len;
	154
	155	return 0;
	156	}
	157
667503dd JB	158	int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
667503dd JB	159	struct net_device *dev,
fffd0934 JB	160	struct cfg80211_ibss_params *params,
fffd0934 JB	161	struct cfg80211_cached_keys *connkeys)
667503dd JB	162	{
	163	struct wireless_dev *wdev = dev->ieee80211_ptr;
	164	int err;
	165
5fe231e8 JB	166	ASSERT_RTNL();
5fe231e8 JB	167
667503dd	168	wdev_lock(wdev);
fffd0934	169	err = __cfg80211_join_ibss(rdev, dev, params, connkeys);
667503dd JB	170	wdev_unlock(wdev);
	171
	172	return err;
	173	}
	174
	175	static void __cfg80211_clear_ibss(struct net_device *dev, bool nowext)
04a773ad JB	176	{
04a773ad JB	177	struct wireless_dev *wdev = dev->ieee80211_ptr;
fffd0934 JB	178	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
fffd0934 JB	179	int i;
04a773ad	180
667503dd JB	181	ASSERT_WDEV_LOCK(wdev);
667503dd JB	182
fffd0934 JB	183	kfree(wdev->connect_keys);
	184	wdev->connect_keys = NULL;
	185
	186	/*
	187	* Delete all the keys ... pairwise keys can't really
	188	* exist any more anyway, but default keys might.
	189	*/
	190	if (rdev->ops->del_key)
	191	for (i = 0; i < 6; i++)
e35e4d28	192	rdev_del_key(rdev, dev, i, false, NULL);
fffd0934	193
04a773ad JB	194	if (wdev->current_bss) {
04a773ad JB	195	cfg80211_unhold_bss(wdev->current_bss);
5b112d3d	196	cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
04a773ad JB	197	}
	198
	199	wdev->current_bss = NULL;
	200	wdev->ssid_len = 0;
3d23e349	201	#ifdef CONFIG_CFG80211_WEXT
9d308429	202	if (!nowext)
cbe8fa9c	203	wdev->wext.ibss.ssid_len = 0;
9d308429	204	#endif
04a773ad JB	205	}
04a773ad JB	206
667503dd JB	207	void cfg80211_clear_ibss(struct net_device *dev, bool nowext)
	208	{
	209	struct wireless_dev *wdev = dev->ieee80211_ptr;
	210
	211	wdev_lock(wdev);
	212	__cfg80211_clear_ibss(dev, nowext);
	213	wdev_unlock(wdev);
	214	}
	215
98d3a7ca JB	216	int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
98d3a7ca JB	217	struct net_device *dev, bool nowext)
04a773ad	218	{
78485475	219	struct wireless_dev *wdev = dev->ieee80211_ptr;
04a773ad JB	220	int err;
04a773ad JB	221
667503dd JB	222	ASSERT_WDEV_LOCK(wdev);
667503dd JB	223
78485475 JB	224	if (!wdev->ssid_len)
	225	return -ENOLINK;
	226
e35e4d28	227	err = rdev_leave_ibss(rdev, dev);
04a773ad JB	228
	229	if (err)
	230	return err;
	231
667503dd	232	__cfg80211_clear_ibss(dev, nowext);
04a773ad JB	233
	234	return 0;
	235	}
	236
667503dd JB	237	int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
	238	struct net_device *dev, bool nowext)
	239	{
	240	struct wireless_dev *wdev = dev->ieee80211_ptr;
	241	int err;
	242
	243	wdev_lock(wdev);
	244	err = __cfg80211_leave_ibss(rdev, dev, nowext);
	245	wdev_unlock(wdev);
	246
	247	return err;
	248	}
	249
3d23e349	250	#ifdef CONFIG_CFG80211_WEXT
fffd0934 JB	251	int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
fffd0934 JB	252	struct wireless_dev *wdev)
04a773ad	253	{
fffd0934	254	struct cfg80211_cached_keys *ck = NULL;
04a773ad	255	enum ieee80211_band band;
fffd0934 JB	256	int i, err;
	257
	258	ASSERT_WDEV_LOCK(wdev);
04a773ad	259
cbe8fa9c JB	260	if (!wdev->wext.ibss.beacon_interval)
cbe8fa9c JB	261	wdev->wext.ibss.beacon_interval = 100;
8e30bc55	262
04a773ad	263	/* try to find an IBSS channel if none requested ... */
683b6d3b	264	if (!wdev->wext.ibss.chandef.chan) {
1fe4517c	265	struct ieee80211_channel *new_chan = NULL;
683b6d3b	266
04a773ad JB	267	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
	268	struct ieee80211_supported_band *sband;
	269	struct ieee80211_channel *chan;
	270
	271	sband = rdev->wiphy.bands[band];
	272	if (!sband)
	273	continue;
	274
	275	for (i = 0; i < sband->n_channels; i++) {
	276	chan = &sband->channels[i];
8fe02e16	277	if (chan->flags & IEEE80211_CHAN_NO_IR)
04a773ad JB	278	continue;
	279	if (chan->flags & IEEE80211_CHAN_DISABLED)
	280	continue;
1fe4517c	281	new_chan = chan;
04a773ad JB	282	break;
	283	}
	284
1fe4517c	285	if (new_chan)
04a773ad JB	286	break;
	287	}
	288
1fe4517c	289	if (!new_chan)
04a773ad	290	return -EINVAL;
1fe4517c SW	291
	292	cfg80211_chandef_create(&wdev->wext.ibss.chandef, new_chan,
	293	NL80211_CHAN_NO_HT);
04a773ad JB	294	}
	295
	296	/* don't join -- SSID is not there */
cbe8fa9c	297	if (!wdev->wext.ibss.ssid_len)
04a773ad JB	298	return 0;
	299
	300	if (!netif_running(wdev->netdev))
	301	return 0;
	302
3be61a38	303	if (wdev->wext.keys) {
fffd0934	304	wdev->wext.keys->def = wdev->wext.default_key;
3be61a38 JB	305	wdev->wext.keys->defmgmt = wdev->wext.default_mgmt_key;
3be61a38 JB	306	}
fffd0934 JB	307
	308	wdev->wext.ibss.privacy = wdev->wext.default_key != -1;
	309
	310	if (wdev->wext.keys) {
	311	ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL);
	312	if (!ck)
	313	return -ENOMEM;
	314	for (i = 0; i < 6; i++)
	315	ck->params[i].key = ck->data[i];
	316	}
	317	err = __cfg80211_join_ibss(rdev, wdev->netdev,
	318	&wdev->wext.ibss, ck);
	319	if (err)
	320	kfree(ck);
	321
	322	return err;
04a773ad JB	323	}
	324
	325	int cfg80211_ibss_wext_siwfreq(struct net_device *dev,
	326	struct iw_request_info *info,
59bbb6f7	327	struct iw_freq wextfreq, char extra)
04a773ad JB	328	{
04a773ad JB	329	struct wireless_dev *wdev = dev->ieee80211_ptr;
59bbb6f7 JB	330	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
	331	struct ieee80211_channel *chan = NULL;
	332	int err, freq;
04a773ad JB	333
	334	/* call only for ibss! */
	335	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	336	return -EINVAL;
	337
59bbb6f7	338	if (!rdev->ops->join_ibss)
04a773ad JB	339	return -EOPNOTSUPP;
04a773ad JB	340
59bbb6f7 JB	341	freq = cfg80211_wext_freq(wdev->wiphy, wextfreq);
	342	if (freq < 0)
	343	return freq;
04a773ad	344
59bbb6f7 JB	345	if (freq) {
	346	chan = ieee80211_get_channel(wdev->wiphy, freq);
	347	if (!chan)
	348	return -EINVAL;
8fe02e16	349	if (chan->flags & IEEE80211_CHAN_NO_IR \|\|
59bbb6f7 JB	350	chan->flags & IEEE80211_CHAN_DISABLED)
	351	return -EINVAL;
	352	}
04a773ad	353
683b6d3b	354	if (wdev->wext.ibss.chandef.chan == chan)
04a773ad JB	355	return 0;
04a773ad JB	356
667503dd JB	357	wdev_lock(wdev);
	358	err = 0;
	359	if (wdev->ssid_len)
59bbb6f7	360	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	361	wdev_unlock(wdev);
	362
	363	if (err)
	364	return err;
04a773ad JB	365
04a773ad JB	366	if (chan) {
1fe4517c SW	367	cfg80211_chandef_create(&wdev->wext.ibss.chandef, chan,
1fe4517c SW	368	NL80211_CHAN_NO_HT);
cbe8fa9c	369	wdev->wext.ibss.channel_fixed = true;
04a773ad JB	370	} else {
04a773ad JB	371	/* cfg80211_ibss_wext_join will pick one if needed */
cbe8fa9c	372	wdev->wext.ibss.channel_fixed = false;
04a773ad JB	373	}
04a773ad JB	374
fffd0934	375	wdev_lock(wdev);
59bbb6f7	376	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934 JB	377	wdev_unlock(wdev);
	378
	379	return err;
04a773ad	380	}
04a773ad JB	381
	382	int cfg80211_ibss_wext_giwfreq(struct net_device *dev,
	383	struct iw_request_info *info,
	384	struct iw_freq freq, char extra)
	385	{
	386	struct wireless_dev *wdev = dev->ieee80211_ptr;
	387	struct ieee80211_channel *chan = NULL;
	388
	389	/* call only for ibss! */
	390	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	391	return -EINVAL;
	392
667503dd	393	wdev_lock(wdev);
04a773ad	394	if (wdev->current_bss)
19957bb3	395	chan = wdev->current_bss->pub.channel;
683b6d3b JB	396	else if (wdev->wext.ibss.chandef.chan)
683b6d3b JB	397	chan = wdev->wext.ibss.chandef.chan;
667503dd	398	wdev_unlock(wdev);
04a773ad JB	399
	400	if (chan) {
	401	freq->m = chan->center_freq;
	402	freq->e = 6;
	403	return 0;
	404	}
	405
	406	/* no channel if not joining */
	407	return -EINVAL;
	408	}
04a773ad JB	409
	410	int cfg80211_ibss_wext_siwessid(struct net_device *dev,
	411	struct iw_request_info *info,
	412	struct iw_point data, char ssid)
	413	{
	414	struct wireless_dev *wdev = dev->ieee80211_ptr;
59bbb6f7	415	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
04a773ad JB	416	size_t len = data->length;
	417	int err;
	418
	419	/* call only for ibss! */
	420	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	421	return -EINVAL;
	422
59bbb6f7	423	if (!rdev->ops->join_ibss)
04a773ad JB	424	return -EOPNOTSUPP;
04a773ad JB	425
667503dd JB	426	wdev_lock(wdev);
	427	err = 0;
	428	if (wdev->ssid_len)
59bbb6f7	429	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	430	wdev_unlock(wdev);
	431
	432	if (err)
	433	return err;
04a773ad JB	434
	435	/* iwconfig uses nul termination in SSID.. */
	436	if (len > 0 && ssid[len - 1] == '\0')
	437	len--;
	438
cbe8fa9c JB	439	wdev->wext.ibss.ssid = wdev->ssid;
	440	memcpy(wdev->wext.ibss.ssid, ssid, len);
	441	wdev->wext.ibss.ssid_len = len;
04a773ad	442
fffd0934	443	wdev_lock(wdev);
59bbb6f7	444	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934 JB	445	wdev_unlock(wdev);
	446
	447	return err;
04a773ad	448	}
04a773ad JB	449
	450	int cfg80211_ibss_wext_giwessid(struct net_device *dev,
	451	struct iw_request_info *info,
	452	struct iw_point data, char ssid)
	453	{
	454	struct wireless_dev *wdev = dev->ieee80211_ptr;
	455
	456	/* call only for ibss! */
	457	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	458	return -EINVAL;
	459
	460	data->flags = 0;
	461
667503dd	462	wdev_lock(wdev);
04a773ad JB	463	if (wdev->ssid_len) {
	464	data->flags = 1;
	465	data->length = wdev->ssid_len;
	466	memcpy(ssid, wdev->ssid, data->length);
cbe8fa9c	467	} else if (wdev->wext.ibss.ssid && wdev->wext.ibss.ssid_len) {
04a773ad	468	data->flags = 1;
cbe8fa9c JB	469	data->length = wdev->wext.ibss.ssid_len;
cbe8fa9c JB	470	memcpy(ssid, wdev->wext.ibss.ssid, data->length);
04a773ad	471	}
667503dd	472	wdev_unlock(wdev);
04a773ad JB	473
	474	return 0;
	475	}
04a773ad JB	476
	477	int cfg80211_ibss_wext_siwap(struct net_device *dev,
	478	struct iw_request_info *info,
	479	struct sockaddr ap_addr, char extra)
	480	{
	481	struct wireless_dev *wdev = dev->ieee80211_ptr;
59bbb6f7	482	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
04a773ad JB	483	u8 *bssid = ap_addr->sa_data;
	484	int err;
	485
	486	/* call only for ibss! */
	487	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	488	return -EINVAL;
	489
59bbb6f7	490	if (!rdev->ops->join_ibss)
04a773ad JB	491	return -EOPNOTSUPP;
	492
	493	if (ap_addr->sa_family != ARPHRD_ETHER)
	494	return -EINVAL;
	495
	496	/* automatic mode */
	497	if (is_zero_ether_addr(bssid) \|\| is_broadcast_ether_addr(bssid))
	498	bssid = NULL;
	499
	500	/* both automatic */
cbe8fa9c	501	if (!bssid && !wdev->wext.ibss.bssid)
04a773ad JB	502	return 0;
	503
	504	/* fixed already - and no change */
cbe8fa9c	505	if (wdev->wext.ibss.bssid && bssid &&
ac422d3c	506	ether_addr_equal(bssid, wdev->wext.ibss.bssid))
04a773ad JB	507	return 0;
04a773ad JB	508
667503dd JB	509	wdev_lock(wdev);
	510	err = 0;
	511	if (wdev->ssid_len)
59bbb6f7	512	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	513	wdev_unlock(wdev);
	514
	515	if (err)
	516	return err;
04a773ad JB	517
04a773ad JB	518	if (bssid) {
cbe8fa9c JB	519	memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
cbe8fa9c JB	520	wdev->wext.ibss.bssid = wdev->wext.bssid;
04a773ad	521	} else
cbe8fa9c	522	wdev->wext.ibss.bssid = NULL;
04a773ad	523
fffd0934	524	wdev_lock(wdev);
59bbb6f7	525	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934 JB	526	wdev_unlock(wdev);
	527
	528	return err;
04a773ad	529	}
04a773ad JB	530
	531	int cfg80211_ibss_wext_giwap(struct net_device *dev,
	532	struct iw_request_info *info,
	533	struct sockaddr ap_addr, char extra)
	534	{
	535	struct wireless_dev *wdev = dev->ieee80211_ptr;
	536
	537	/* call only for ibss! */
	538	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	539	return -EINVAL;
	540
	541	ap_addr->sa_family = ARPHRD_ETHER;
	542
667503dd	543	wdev_lock(wdev);
7ebbe6bd	544	if (wdev->current_bss)
19957bb3	545	memcpy(ap_addr->sa_data, wdev->current_bss->pub.bssid, ETH_ALEN);
80e5b06a	546	else if (wdev->wext.ibss.bssid)
cbe8fa9c	547	memcpy(ap_addr->sa_data, wdev->wext.ibss.bssid, ETH_ALEN);
80e5b06a ZY	548	else
	549	memset(ap_addr->sa_data, 0, ETH_ALEN);
	550
667503dd JB	551	wdev_unlock(wdev);
667503dd JB	552
04a773ad JB	553	return 0;
04a773ad JB	554	}
04a773ad	555	#endif