[mirror_ubuntu-artful-kernel.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 ieee80211_channel *channel)
{
	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, channel, bssid, NULL, 0,
			       IEEE80211_BSS_TYPE_IBSS, IEEE80211_PRIVACY_ANY);

	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);

	if (!(wdev->wiphy->flags & WIPHY_FLAG_HAS_STATIC_WEP))
		cfg80211_upload_connect_keys(wdev);

	nl80211_send_ibss_bssid(wiphy_to_rdev(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,
			  struct ieee80211_channel *channel, gfp_t gfp)
{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
	struct cfg80211_event *ev;
	unsigned long flags;

	trace_cfg80211_ibss_joined(dev, bssid, channel);

	if (WARN_ON(!channel))
		return;

	ev = kzalloc(sizeof(*ev), gfp);
	if (!ev)
		return;

	ev->type = EVENT_IBSS_JOINED;
	memcpy(ev->ij.bssid, bssid, ETH_ALEN);
	ev->ij.channel = channel;

	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);

static 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 == NL80211_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(connkeys && connkeys->def < 0))
		return -EINVAL;

	if (WARN_ON(wdev->connect_keys))
		kzfree(wdev->connect_keys);
	wdev->connect_keys = connkeys;

	wdev->ibss_fixed = params->channel_fixed;
	wdev->ibss_dfs_possible = params->userspace_handles_dfs;
	wdev->chandef = params->chandef;
#ifdef CONFIG_CFG80211_WEXT
	wdev->wext.ibss.chandef = params->chandef;
#endif
	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_rdev(wdev->wiphy);
	int i;

	ASSERT_WDEV_LOCK(wdev);

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

	rdev_set_qos_map(rdev, dev, 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;
	memset(&wdev->chandef, 0, sizeof(wdev->chandef));
#ifdef CONFIG_CFG80211_WEXT
	if (!nowext)
		wdev->wext.ibss.ssid_len = 0;
#endif
	cfg80211_sched_dfs_chan_update(rdev);
}

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 nl80211_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 < NUM_NL80211_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.ibss.privacy = wdev->wext.default_key != -1;

	if (wdev->wext.keys && wdev->wext.keys->def != -1) {
		ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL);
		if (!ck)
			return -ENOMEM;
		for (i = 0; i < CFG80211_MAX_WEP_KEYS; 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_rdev(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(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_rdev(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--;

	memcpy(wdev->ssid, ssid, len);
	wdev->wext.ibss.ssid = wdev->ssid;
	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_rdev(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;

	if (bssid && !is_valid_ether_addr(bssid))
		return -EINVAL;

	/* 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
		eth_zero_addr(ap_addr->sa_data);

	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
fe94f3a4 AQ	17	void __cfg80211_ibss_joined(struct net_device dev, const u8 bssid,
fe94f3a4 AQ	18	struct ieee80211_channel *channel)
04a773ad JB	19	{
	20	struct wireless_dev *wdev = dev->ieee80211_ptr;
	21	struct cfg80211_bss *bss;
3d23e349	22	#ifdef CONFIG_CFG80211_WEXT
04a773ad JB	23	union iwreq_data wrqu;
	24	#endif
	25
	26	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	27	return;
	28
f7969969	29	if (!wdev->ssid_len)
04a773ad JB	30	return;
04a773ad JB	31
fe94f3a4	32	bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, NULL, 0,
6eb18137	33	IEEE80211_BSS_TYPE_IBSS, IEEE80211_PRIVACY_ANY);
04a773ad JB	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
b8676221 DS	46	if (!(wdev->wiphy->flags & WIPHY_FLAG_HAS_STATIC_WEP))
b8676221 DS	47	cfg80211_upload_connect_keys(wdev);
fffd0934	48
f26cbf40	49	nl80211_send_ibss_bssid(wiphy_to_rdev(wdev->wiphy), dev, bssid,
667503dd	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	57
fe94f3a4 AQ	58	void cfg80211_ibss_joined(struct net_device dev, const u8 bssid,
fe94f3a4 AQ	59	struct ieee80211_channel *channel, gfp_t gfp)
667503dd JB	60	{
667503dd JB	61	struct wireless_dev *wdev = dev->ieee80211_ptr;
f26cbf40	62	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
667503dd JB	63	struct cfg80211_event *ev;
	64	unsigned long flags;
	65
fe94f3a4 AQ	66	trace_cfg80211_ibss_joined(dev, bssid, channel);
	67
	68	if (WARN_ON(!channel))
	69	return;
4ee3e063	70
667503dd JB	71	ev = kzalloc(sizeof(*ev), gfp);
	72	if (!ev)
	73	return;
	74
	75	ev->type = EVENT_IBSS_JOINED;
fe94f3a4 AQ	76	memcpy(ev->ij.bssid, bssid, ETH_ALEN);
fe94f3a4 AQ	77	ev->ij.channel = channel;
667503dd JB	78
	79	spin_lock_irqsave(&wdev->event_lock, flags);
	80	list_add_tail(&ev->list, &wdev->event_list);
	81	spin_unlock_irqrestore(&wdev->event_lock, flags);
e60d7443	82	queue_work(cfg80211_wq, &rdev->event_work);
667503dd	83	}
04a773ad JB	84	EXPORT_SYMBOL(cfg80211_ibss_joined);
04a773ad JB	85
2316d7b0 ZG	86	static int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
	87	struct net_device *dev,
	88	struct cfg80211_ibss_params *params,
	89	struct cfg80211_cached_keys *connkeys)
04a773ad JB	90	{
	91	struct wireless_dev *wdev = dev->ieee80211_ptr;
	92	int err;
	93
667503dd JB	94	ASSERT_WDEV_LOCK(wdev);
667503dd JB	95
04a773ad JB	96	if (wdev->ssid_len)
	97	return -EALREADY;
	98
93b05238 JB	99	if (!params->basic_rates) {
	100	/*
	101	* If no rates were explicitly configured,
	102	* use the mandatory rate set for 11b or
	103	* 11a for maximum compatibility.
	104	*/
	105	struct ieee80211_supported_band *sband =
683b6d3b	106	rdev->wiphy.bands[params->chandef.chan->band];
93b05238	107	int j;
57fbcce3	108	u32 flag = params->chandef.chan->band == NL80211_BAND_5GHZ ?
93b05238 JB	109	IEEE80211_RATE_MANDATORY_A :
	110	IEEE80211_RATE_MANDATORY_B;
	111
	112	for (j = 0; j < sband->n_bitrates; j++) {
	113	if (sband->bitrates[j].flags & flag)
	114	params->basic_rates \|= BIT(j);
	115	}
	116	}
	117
f1c1f17a JB	118	if (WARN_ON(connkeys && connkeys->def < 0))
	119	return -EINVAL;
	120
fffd0934	121	if (WARN_ON(wdev->connect_keys))
b47f610b	122	kzfree(wdev->connect_keys);
fffd0934 JB	123	wdev->connect_keys = connkeys;
fffd0934 JB	124
c30a3d38	125	wdev->ibss_fixed = params->channel_fixed;
5336fa88	126	wdev->ibss_dfs_possible = params->userspace_handles_dfs;
9e0e2961	127	wdev->chandef = params->chandef;
3d23e349	128	#ifdef CONFIG_CFG80211_WEXT
683b6d3b	129	wdev->wext.ibss.chandef = params->chandef;
04a773ad	130	#endif
e35e4d28	131	err = rdev_join_ibss(rdev, dev, params);
fffd0934 JB	132	if (err) {
fffd0934 JB	133	wdev->connect_keys = NULL;
04a773ad	134	return err;
fffd0934	135	}
04a773ad JB	136
	137	memcpy(wdev->ssid, params->ssid, params->ssid_len);
	138	wdev->ssid_len = params->ssid_len;
	139
	140	return 0;
	141	}
	142
667503dd JB	143	int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
667503dd JB	144	struct net_device *dev,
fffd0934 JB	145	struct cfg80211_ibss_params *params,
fffd0934 JB	146	struct cfg80211_cached_keys *connkeys)
667503dd JB	147	{
	148	struct wireless_dev *wdev = dev->ieee80211_ptr;
	149	int err;
	150
5fe231e8 JB	151	ASSERT_RTNL();
5fe231e8 JB	152
667503dd	153	wdev_lock(wdev);
fffd0934	154	err = __cfg80211_join_ibss(rdev, dev, params, connkeys);
667503dd JB	155	wdev_unlock(wdev);
	156
	157	return err;
	158	}
	159
	160	static void __cfg80211_clear_ibss(struct net_device *dev, bool nowext)
04a773ad JB	161	{
04a773ad JB	162	struct wireless_dev *wdev = dev->ieee80211_ptr;
f26cbf40	163	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
fffd0934	164	int i;
04a773ad	165
667503dd JB	166	ASSERT_WDEV_LOCK(wdev);
667503dd JB	167
b47f610b	168	kzfree(wdev->connect_keys);
fffd0934 JB	169	wdev->connect_keys = NULL;
fffd0934 JB	170
fa9ffc74 KP	171	rdev_set_qos_map(rdev, dev, NULL);
fa9ffc74 KP	172
fffd0934 JB	173	/*
	174	* Delete all the keys ... pairwise keys can't really
	175	* exist any more anyway, but default keys might.
	176	*/
	177	if (rdev->ops->del_key)
	178	for (i = 0; i < 6; i++)
e35e4d28	179	rdev_del_key(rdev, dev, i, false, NULL);
fffd0934	180
04a773ad JB	181	if (wdev->current_bss) {
04a773ad JB	182	cfg80211_unhold_bss(wdev->current_bss);
5b112d3d	183	cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
04a773ad JB	184	}
	185
	186	wdev->current_bss = NULL;
	187	wdev->ssid_len = 0;
9e0e2961	188	memset(&wdev->chandef, 0, sizeof(wdev->chandef));
3d23e349	189	#ifdef CONFIG_CFG80211_WEXT
9d308429	190	if (!nowext)
cbe8fa9c	191	wdev->wext.ibss.ssid_len = 0;
9d308429	192	#endif
b35a51c7	193	cfg80211_sched_dfs_chan_update(rdev);
04a773ad JB	194	}
04a773ad JB	195
667503dd JB	196	void cfg80211_clear_ibss(struct net_device *dev, bool nowext)
	197	{
	198	struct wireless_dev *wdev = dev->ieee80211_ptr;
	199
	200	wdev_lock(wdev);
	201	__cfg80211_clear_ibss(dev, nowext);
	202	wdev_unlock(wdev);
	203	}
	204
98d3a7ca JB	205	int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
98d3a7ca JB	206	struct net_device *dev, bool nowext)
04a773ad	207	{
78485475	208	struct wireless_dev *wdev = dev->ieee80211_ptr;
04a773ad JB	209	int err;
04a773ad JB	210
667503dd JB	211	ASSERT_WDEV_LOCK(wdev);
667503dd JB	212
78485475 JB	213	if (!wdev->ssid_len)
	214	return -ENOLINK;
	215
e35e4d28	216	err = rdev_leave_ibss(rdev, dev);
04a773ad JB	217
	218	if (err)
	219	return err;
	220
667503dd	221	__cfg80211_clear_ibss(dev, nowext);
04a773ad JB	222
	223	return 0;
	224	}
	225
667503dd JB	226	int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
	227	struct net_device *dev, bool nowext)
	228	{
	229	struct wireless_dev *wdev = dev->ieee80211_ptr;
	230	int err;
	231
	232	wdev_lock(wdev);
	233	err = __cfg80211_leave_ibss(rdev, dev, nowext);
	234	wdev_unlock(wdev);
	235
	236	return err;
	237	}
	238
3d23e349	239	#ifdef CONFIG_CFG80211_WEXT
fffd0934 JB	240	int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
fffd0934 JB	241	struct wireless_dev *wdev)
04a773ad	242	{
fffd0934	243	struct cfg80211_cached_keys *ck = NULL;
57fbcce3	244	enum nl80211_band band;
fffd0934 JB	245	int i, err;
	246
	247	ASSERT_WDEV_LOCK(wdev);
04a773ad	248
cbe8fa9c JB	249	if (!wdev->wext.ibss.beacon_interval)
cbe8fa9c JB	250	wdev->wext.ibss.beacon_interval = 100;
8e30bc55	251
04a773ad	252	/* try to find an IBSS channel if none requested ... */
683b6d3b	253	if (!wdev->wext.ibss.chandef.chan) {
1fe4517c	254	struct ieee80211_channel *new_chan = NULL;
683b6d3b	255
57fbcce3	256	for (band = 0; band < NUM_NL80211_BANDS; band++) {
04a773ad JB	257	struct ieee80211_supported_band *sband;
	258	struct ieee80211_channel *chan;
	259
	260	sband = rdev->wiphy.bands[band];
	261	if (!sband)
	262	continue;
	263
	264	for (i = 0; i < sband->n_channels; i++) {
	265	chan = &sband->channels[i];
8fe02e16	266	if (chan->flags & IEEE80211_CHAN_NO_IR)
04a773ad JB	267	continue;
	268	if (chan->flags & IEEE80211_CHAN_DISABLED)
	269	continue;
1fe4517c	270	new_chan = chan;
04a773ad JB	271	break;
	272	}
	273
1fe4517c	274	if (new_chan)
04a773ad JB	275	break;
	276	}
	277
1fe4517c	278	if (!new_chan)
04a773ad	279	return -EINVAL;
1fe4517c SW	280
	281	cfg80211_chandef_create(&wdev->wext.ibss.chandef, new_chan,
	282	NL80211_CHAN_NO_HT);
04a773ad JB	283	}
	284
	285	/* don't join -- SSID is not there */
cbe8fa9c	286	if (!wdev->wext.ibss.ssid_len)
04a773ad JB	287	return 0;
	288
	289	if (!netif_running(wdev->netdev))
	290	return 0;
	291
89b706fb	292	if (wdev->wext.keys)
fffd0934 JB	293	wdev->wext.keys->def = wdev->wext.default_key;
	294
	295	wdev->wext.ibss.privacy = wdev->wext.default_key != -1;
	296
f1c1f17a	297	if (wdev->wext.keys && wdev->wext.keys->def != -1) {
fffd0934 JB	298	ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL);
	299	if (!ck)
	300	return -ENOMEM;
b8676221	301	for (i = 0; i < CFG80211_MAX_WEP_KEYS; i++)
fffd0934 JB	302	ck->params[i].key = ck->data[i];
	303	}
	304	err = __cfg80211_join_ibss(rdev, wdev->netdev,
	305	&wdev->wext.ibss, ck);
	306	if (err)
	307	kfree(ck);
	308
	309	return err;
04a773ad JB	310	}
	311
	312	int cfg80211_ibss_wext_siwfreq(struct net_device *dev,
	313	struct iw_request_info *info,
59bbb6f7	314	struct iw_freq wextfreq, char extra)
04a773ad JB	315	{
04a773ad JB	316	struct wireless_dev *wdev = dev->ieee80211_ptr;
f26cbf40	317	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
59bbb6f7 JB	318	struct ieee80211_channel *chan = NULL;
59bbb6f7 JB	319	int err, freq;
04a773ad JB	320
	321	/* call only for ibss! */
	322	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	323	return -EINVAL;
	324
59bbb6f7	325	if (!rdev->ops->join_ibss)
04a773ad JB	326	return -EOPNOTSUPP;
04a773ad JB	327
96998e3a	328	freq = cfg80211_wext_freq(wextfreq);
59bbb6f7 JB	329	if (freq < 0)
59bbb6f7 JB	330	return freq;
04a773ad	331
59bbb6f7 JB	332	if (freq) {
	333	chan = ieee80211_get_channel(wdev->wiphy, freq);
	334	if (!chan)
	335	return -EINVAL;
8fe02e16	336	if (chan->flags & IEEE80211_CHAN_NO_IR \|\|
59bbb6f7 JB	337	chan->flags & IEEE80211_CHAN_DISABLED)
	338	return -EINVAL;
	339	}
04a773ad	340
683b6d3b	341	if (wdev->wext.ibss.chandef.chan == chan)
04a773ad JB	342	return 0;
04a773ad JB	343
667503dd JB	344	wdev_lock(wdev);
	345	err = 0;
	346	if (wdev->ssid_len)
59bbb6f7	347	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	348	wdev_unlock(wdev);
	349
	350	if (err)
	351	return err;
04a773ad JB	352
04a773ad JB	353	if (chan) {
1fe4517c SW	354	cfg80211_chandef_create(&wdev->wext.ibss.chandef, chan,
1fe4517c SW	355	NL80211_CHAN_NO_HT);
cbe8fa9c	356	wdev->wext.ibss.channel_fixed = true;
04a773ad JB	357	} else {
04a773ad JB	358	/* cfg80211_ibss_wext_join will pick one if needed */
cbe8fa9c	359	wdev->wext.ibss.channel_fixed = false;
04a773ad JB	360	}
04a773ad JB	361
fffd0934	362	wdev_lock(wdev);
59bbb6f7	363	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934 JB	364	wdev_unlock(wdev);
	365
	366	return err;
04a773ad	367	}
04a773ad JB	368
	369	int cfg80211_ibss_wext_giwfreq(struct net_device *dev,
	370	struct iw_request_info *info,
	371	struct iw_freq freq, char extra)
	372	{
	373	struct wireless_dev *wdev = dev->ieee80211_ptr;
	374	struct ieee80211_channel *chan = NULL;
	375
	376	/* call only for ibss! */
	377	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	378	return -EINVAL;
	379
667503dd	380	wdev_lock(wdev);
04a773ad	381	if (wdev->current_bss)
19957bb3	382	chan = wdev->current_bss->pub.channel;
683b6d3b JB	383	else if (wdev->wext.ibss.chandef.chan)
683b6d3b JB	384	chan = wdev->wext.ibss.chandef.chan;
667503dd	385	wdev_unlock(wdev);
04a773ad JB	386
	387	if (chan) {
	388	freq->m = chan->center_freq;
	389	freq->e = 6;
	390	return 0;
	391	}
	392
	393	/* no channel if not joining */
	394	return -EINVAL;
	395	}
04a773ad JB	396
	397	int cfg80211_ibss_wext_siwessid(struct net_device *dev,
	398	struct iw_request_info *info,
	399	struct iw_point data, char ssid)
	400	{
	401	struct wireless_dev *wdev = dev->ieee80211_ptr;
f26cbf40	402	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
04a773ad JB	403	size_t len = data->length;
	404	int err;
	405
	406	/* call only for ibss! */
	407	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	408	return -EINVAL;
	409
59bbb6f7	410	if (!rdev->ops->join_ibss)
04a773ad JB	411	return -EOPNOTSUPP;
04a773ad JB	412
667503dd JB	413	wdev_lock(wdev);
	414	err = 0;
	415	if (wdev->ssid_len)
59bbb6f7	416	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	417	wdev_unlock(wdev);
	418
	419	if (err)
	420	return err;
04a773ad JB	421
	422	/* iwconfig uses nul termination in SSID.. */
	423	if (len > 0 && ssid[len - 1] == '\0')
	424	len--;
	425
c1e5f471	426	memcpy(wdev->ssid, ssid, len);
cbe8fa9c	427	wdev->wext.ibss.ssid = wdev->ssid;
cbe8fa9c	428	wdev->wext.ibss.ssid_len = len;
04a773ad	429
fffd0934	430	wdev_lock(wdev);
59bbb6f7	431	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934 JB	432	wdev_unlock(wdev);
	433
	434	return err;
04a773ad	435	}
04a773ad JB	436
	437	int cfg80211_ibss_wext_giwessid(struct net_device *dev,
	438	struct iw_request_info *info,
	439	struct iw_point data, char ssid)
	440	{
	441	struct wireless_dev *wdev = dev->ieee80211_ptr;
	442
	443	/* call only for ibss! */
	444	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	445	return -EINVAL;
	446
	447	data->flags = 0;
	448
667503dd	449	wdev_lock(wdev);
04a773ad JB	450	if (wdev->ssid_len) {
	451	data->flags = 1;
	452	data->length = wdev->ssid_len;
	453	memcpy(ssid, wdev->ssid, data->length);
cbe8fa9c	454	} else if (wdev->wext.ibss.ssid && wdev->wext.ibss.ssid_len) {
04a773ad	455	data->flags = 1;
cbe8fa9c JB	456	data->length = wdev->wext.ibss.ssid_len;
cbe8fa9c JB	457	memcpy(ssid, wdev->wext.ibss.ssid, data->length);
04a773ad	458	}
667503dd	459	wdev_unlock(wdev);
04a773ad JB	460
	461	return 0;
	462	}
04a773ad JB	463
	464	int cfg80211_ibss_wext_siwap(struct net_device *dev,
	465	struct iw_request_info *info,
	466	struct sockaddr ap_addr, char extra)
	467	{
	468	struct wireless_dev *wdev = dev->ieee80211_ptr;
f26cbf40	469	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
04a773ad JB	470	u8 *bssid = ap_addr->sa_data;
	471	int err;
	472
	473	/* call only for ibss! */
	474	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	475	return -EINVAL;
	476
59bbb6f7	477	if (!rdev->ops->join_ibss)
04a773ad JB	478	return -EOPNOTSUPP;
	479
	480	if (ap_addr->sa_family != ARPHRD_ETHER)
	481	return -EINVAL;
	482
	483	/* automatic mode */
	484	if (is_zero_ether_addr(bssid) \|\| is_broadcast_ether_addr(bssid))
	485	bssid = NULL;
	486
74f82741 JB	487	if (bssid && !is_valid_ether_addr(bssid))
	488	return -EINVAL;
	489
04a773ad	490	/* both automatic */
cbe8fa9c	491	if (!bssid && !wdev->wext.ibss.bssid)
04a773ad JB	492	return 0;
	493
	494	/* fixed already - and no change */
cbe8fa9c	495	if (wdev->wext.ibss.bssid && bssid &&
ac422d3c	496	ether_addr_equal(bssid, wdev->wext.ibss.bssid))
04a773ad JB	497	return 0;
04a773ad JB	498
667503dd JB	499	wdev_lock(wdev);
	500	err = 0;
	501	if (wdev->ssid_len)
59bbb6f7	502	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	503	wdev_unlock(wdev);
	504
	505	if (err)
	506	return err;
04a773ad JB	507
04a773ad JB	508	if (bssid) {
cbe8fa9c JB	509	memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
cbe8fa9c JB	510	wdev->wext.ibss.bssid = wdev->wext.bssid;
04a773ad	511	} else
cbe8fa9c	512	wdev->wext.ibss.bssid = NULL;
04a773ad	513
fffd0934	514	wdev_lock(wdev);
59bbb6f7	515	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934 JB	516	wdev_unlock(wdev);
	517
	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	538	else
d2beae10	539	eth_zero_addr(ap_addr->sa_data);
80e5b06a	540
667503dd JB	541	wdev_unlock(wdev);
667503dd JB	542
04a773ad JB	543	return 0;
04a773ad JB	544	}
04a773ad	545	#endif