[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) {
		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	{
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) {
3d9d1d66	265	wdev->wext.ibss.chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
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];
	277	if (chan->flags & IEEE80211_CHAN_NO_IBSS)
	278	continue;
	279	if (chan->flags & IEEE80211_CHAN_DISABLED)
	280	continue;
683b6d3b	281	wdev->wext.ibss.chandef.chan = chan;
04a773ad JB	282	break;
	283	}
	284
683b6d3b	285	if (wdev->wext.ibss.chandef.chan)
04a773ad JB	286	break;
	287	}
	288
683b6d3b	289	if (!wdev->wext.ibss.chandef.chan)
04a773ad JB	290	return -EINVAL;
	291	}
	292
	293	/* don't join -- SSID is not there */
cbe8fa9c	294	if (!wdev->wext.ibss.ssid_len)
04a773ad JB	295	return 0;
	296
	297	if (!netif_running(wdev->netdev))
	298	return 0;
	299
3be61a38	300	if (wdev->wext.keys) {
fffd0934	301	wdev->wext.keys->def = wdev->wext.default_key;
3be61a38 JB	302	wdev->wext.keys->defmgmt = wdev->wext.default_mgmt_key;
3be61a38 JB	303	}
fffd0934 JB	304
	305	wdev->wext.ibss.privacy = wdev->wext.default_key != -1;
	306
	307	if (wdev->wext.keys) {
	308	ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL);
	309	if (!ck)
	310	return -ENOMEM;
	311	for (i = 0; i < 6; i++)
	312	ck->params[i].key = ck->data[i];
	313	}
	314	err = __cfg80211_join_ibss(rdev, wdev->netdev,
	315	&wdev->wext.ibss, ck);
	316	if (err)
	317	kfree(ck);
	318
	319	return err;
04a773ad JB	320	}
	321
	322	int cfg80211_ibss_wext_siwfreq(struct net_device *dev,
	323	struct iw_request_info *info,
59bbb6f7	324	struct iw_freq wextfreq, char extra)
04a773ad JB	325	{
04a773ad JB	326	struct wireless_dev *wdev = dev->ieee80211_ptr;
59bbb6f7 JB	327	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
	328	struct ieee80211_channel *chan = NULL;
	329	int err, freq;
04a773ad JB	330
	331	/* call only for ibss! */
	332	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	333	return -EINVAL;
	334
59bbb6f7	335	if (!rdev->ops->join_ibss)
04a773ad JB	336	return -EOPNOTSUPP;
04a773ad JB	337
59bbb6f7 JB	338	freq = cfg80211_wext_freq(wdev->wiphy, wextfreq);
	339	if (freq < 0)
	340	return freq;
04a773ad	341
59bbb6f7 JB	342	if (freq) {
	343	chan = ieee80211_get_channel(wdev->wiphy, freq);
	344	if (!chan)
	345	return -EINVAL;
	346	if (chan->flags & IEEE80211_CHAN_NO_IBSS \|\|
	347	chan->flags & IEEE80211_CHAN_DISABLED)
	348	return -EINVAL;
	349	}
04a773ad	350
683b6d3b	351	if (wdev->wext.ibss.chandef.chan == chan)
04a773ad JB	352	return 0;
04a773ad JB	353
667503dd JB	354	wdev_lock(wdev);
	355	err = 0;
	356	if (wdev->ssid_len)
59bbb6f7	357	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	358	wdev_unlock(wdev);
	359
	360	if (err)
	361	return err;
04a773ad JB	362
04a773ad JB	363	if (chan) {
683b6d3b	364	wdev->wext.ibss.chandef.chan = chan;
3d9d1d66	365	wdev->wext.ibss.chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
cbe8fa9c	366	wdev->wext.ibss.channel_fixed = true;
04a773ad JB	367	} else {
04a773ad JB	368	/* cfg80211_ibss_wext_join will pick one if needed */
cbe8fa9c	369	wdev->wext.ibss.channel_fixed = false;
04a773ad JB	370	}
04a773ad JB	371
fffd0934	372	wdev_lock(wdev);
59bbb6f7	373	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934 JB	374	wdev_unlock(wdev);
	375
	376	return err;
04a773ad	377	}
04a773ad JB	378
	379	int cfg80211_ibss_wext_giwfreq(struct net_device *dev,
	380	struct iw_request_info *info,
	381	struct iw_freq freq, char extra)
	382	{
	383	struct wireless_dev *wdev = dev->ieee80211_ptr;
	384	struct ieee80211_channel *chan = NULL;
	385
	386	/* call only for ibss! */
	387	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	388	return -EINVAL;
	389
667503dd	390	wdev_lock(wdev);
04a773ad	391	if (wdev->current_bss)
19957bb3	392	chan = wdev->current_bss->pub.channel;
683b6d3b JB	393	else if (wdev->wext.ibss.chandef.chan)
683b6d3b JB	394	chan = wdev->wext.ibss.chandef.chan;
667503dd	395	wdev_unlock(wdev);
04a773ad JB	396
	397	if (chan) {
	398	freq->m = chan->center_freq;
	399	freq->e = 6;
	400	return 0;
	401	}
	402
	403	/* no channel if not joining */
	404	return -EINVAL;
	405	}
04a773ad JB	406
	407	int cfg80211_ibss_wext_siwessid(struct net_device *dev,
	408	struct iw_request_info *info,
	409	struct iw_point data, char ssid)
	410	{
	411	struct wireless_dev *wdev = dev->ieee80211_ptr;
59bbb6f7	412	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
04a773ad JB	413	size_t len = data->length;
	414	int err;
	415
	416	/* call only for ibss! */
	417	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	418	return -EINVAL;
	419
59bbb6f7	420	if (!rdev->ops->join_ibss)
04a773ad JB	421	return -EOPNOTSUPP;
04a773ad JB	422
667503dd JB	423	wdev_lock(wdev);
	424	err = 0;
	425	if (wdev->ssid_len)
59bbb6f7	426	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	427	wdev_unlock(wdev);
	428
	429	if (err)
	430	return err;
04a773ad JB	431
	432	/* iwconfig uses nul termination in SSID.. */
	433	if (len > 0 && ssid[len - 1] == '\0')
	434	len--;
	435
cbe8fa9c JB	436	wdev->wext.ibss.ssid = wdev->ssid;
	437	memcpy(wdev->wext.ibss.ssid, ssid, len);
	438	wdev->wext.ibss.ssid_len = len;
04a773ad	439
fffd0934	440	wdev_lock(wdev);
59bbb6f7	441	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934 JB	442	wdev_unlock(wdev);
	443
	444	return err;
04a773ad	445	}
04a773ad JB	446
	447	int cfg80211_ibss_wext_giwessid(struct net_device *dev,
	448	struct iw_request_info *info,
	449	struct iw_point data, char ssid)
	450	{
	451	struct wireless_dev *wdev = dev->ieee80211_ptr;
	452
	453	/* call only for ibss! */
	454	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	455	return -EINVAL;
	456
	457	data->flags = 0;
	458
667503dd	459	wdev_lock(wdev);
04a773ad JB	460	if (wdev->ssid_len) {
	461	data->flags = 1;
	462	data->length = wdev->ssid_len;
	463	memcpy(ssid, wdev->ssid, data->length);
cbe8fa9c	464	} else if (wdev->wext.ibss.ssid && wdev->wext.ibss.ssid_len) {
04a773ad	465	data->flags = 1;
cbe8fa9c JB	466	data->length = wdev->wext.ibss.ssid_len;
cbe8fa9c JB	467	memcpy(ssid, wdev->wext.ibss.ssid, data->length);
04a773ad	468	}
667503dd	469	wdev_unlock(wdev);
04a773ad JB	470
	471	return 0;
	472	}
04a773ad JB	473
	474	int cfg80211_ibss_wext_siwap(struct net_device *dev,
	475	struct iw_request_info *info,
	476	struct sockaddr ap_addr, char extra)
	477	{
	478	struct wireless_dev *wdev = dev->ieee80211_ptr;
59bbb6f7	479	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
04a773ad JB	480	u8 *bssid = ap_addr->sa_data;
	481	int err;
	482
	483	/* call only for ibss! */
	484	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	485	return -EINVAL;
	486
59bbb6f7	487	if (!rdev->ops->join_ibss)
04a773ad JB	488	return -EOPNOTSUPP;
	489
	490	if (ap_addr->sa_family != ARPHRD_ETHER)
	491	return -EINVAL;
	492
	493	/* automatic mode */
	494	if (is_zero_ether_addr(bssid) \|\| is_broadcast_ether_addr(bssid))
	495	bssid = NULL;
	496
	497	/* both automatic */
cbe8fa9c	498	if (!bssid && !wdev->wext.ibss.bssid)
04a773ad JB	499	return 0;
	500
	501	/* fixed already - and no change */
cbe8fa9c	502	if (wdev->wext.ibss.bssid && bssid &&
ac422d3c	503	ether_addr_equal(bssid, wdev->wext.ibss.bssid))
04a773ad JB	504	return 0;
04a773ad JB	505
667503dd JB	506	wdev_lock(wdev);
	507	err = 0;
	508	if (wdev->ssid_len)
59bbb6f7	509	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	510	wdev_unlock(wdev);
	511
	512	if (err)
	513	return err;
04a773ad JB	514
04a773ad JB	515	if (bssid) {
cbe8fa9c JB	516	memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
cbe8fa9c JB	517	wdev->wext.ibss.bssid = wdev->wext.bssid;
04a773ad	518	} else
cbe8fa9c	519	wdev->wext.ibss.bssid = NULL;
04a773ad	520
fffd0934	521	wdev_lock(wdev);
59bbb6f7	522	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934 JB	523	wdev_unlock(wdev);
	524
	525	return err;
04a773ad	526	}
04a773ad JB	527
	528	int cfg80211_ibss_wext_giwap(struct net_device *dev,
	529	struct iw_request_info *info,
	530	struct sockaddr ap_addr, char extra)
	531	{
	532	struct wireless_dev *wdev = dev->ieee80211_ptr;
	533
	534	/* call only for ibss! */
	535	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	536	return -EINVAL;
	537
	538	ap_addr->sa_family = ARPHRD_ETHER;
	539
667503dd	540	wdev_lock(wdev);
7ebbe6bd	541	if (wdev->current_bss)
19957bb3	542	memcpy(ap_addr->sa_data, wdev->current_bss->pub.bssid, ETH_ALEN);
80e5b06a	543	else if (wdev->wext.ibss.bssid)
cbe8fa9c	544	memcpy(ap_addr->sa_data, wdev->wext.ibss.bssid, ETH_ALEN);
80e5b06a ZY	545	else
	546	memset(ap_addr->sa_data, 0, ETH_ALEN);
	547
667503dd JB	548	wdev_unlock(wdev);
667503dd JB	549
04a773ad JB	550	return 0;
04a773ad JB	551	}
04a773ad	552	#endif