[mirror_ubuntu-zesty-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
}

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
04a773ad JB	193	}
04a773ad JB	194
667503dd JB	195	void cfg80211_clear_ibss(struct net_device *dev, bool nowext)
	196	{
	197	struct wireless_dev *wdev = dev->ieee80211_ptr;
	198
	199	wdev_lock(wdev);
	200	__cfg80211_clear_ibss(dev, nowext);
	201	wdev_unlock(wdev);
	202	}
	203
98d3a7ca JB	204	int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
98d3a7ca JB	205	struct net_device *dev, bool nowext)
04a773ad	206	{
78485475	207	struct wireless_dev *wdev = dev->ieee80211_ptr;
04a773ad JB	208	int err;
04a773ad JB	209
667503dd JB	210	ASSERT_WDEV_LOCK(wdev);
667503dd JB	211
78485475 JB	212	if (!wdev->ssid_len)
	213	return -ENOLINK;
	214
e35e4d28	215	err = rdev_leave_ibss(rdev, dev);
04a773ad JB	216
	217	if (err)
	218	return err;
	219
667503dd	220	__cfg80211_clear_ibss(dev, nowext);
04a773ad JB	221
	222	return 0;
	223	}
	224
667503dd JB	225	int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
	226	struct net_device *dev, bool nowext)
	227	{
	228	struct wireless_dev *wdev = dev->ieee80211_ptr;
	229	int err;
	230
	231	wdev_lock(wdev);
	232	err = __cfg80211_leave_ibss(rdev, dev, nowext);
	233	wdev_unlock(wdev);
	234
	235	return err;
	236	}
	237
3d23e349	238	#ifdef CONFIG_CFG80211_WEXT
fffd0934 JB	239	int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
fffd0934 JB	240	struct wireless_dev *wdev)
04a773ad	241	{
fffd0934	242	struct cfg80211_cached_keys *ck = NULL;
57fbcce3	243	enum nl80211_band band;
fffd0934 JB	244	int i, err;
	245
	246	ASSERT_WDEV_LOCK(wdev);
04a773ad	247
cbe8fa9c JB	248	if (!wdev->wext.ibss.beacon_interval)
cbe8fa9c JB	249	wdev->wext.ibss.beacon_interval = 100;
8e30bc55	250
04a773ad	251	/* try to find an IBSS channel if none requested ... */
683b6d3b	252	if (!wdev->wext.ibss.chandef.chan) {
1fe4517c	253	struct ieee80211_channel *new_chan = NULL;
683b6d3b	254
57fbcce3	255	for (band = 0; band < NUM_NL80211_BANDS; band++) {
04a773ad JB	256	struct ieee80211_supported_band *sband;
	257	struct ieee80211_channel *chan;
	258
	259	sband = rdev->wiphy.bands[band];
	260	if (!sband)
	261	continue;
	262
	263	for (i = 0; i < sband->n_channels; i++) {
	264	chan = &sband->channels[i];
8fe02e16	265	if (chan->flags & IEEE80211_CHAN_NO_IR)
04a773ad JB	266	continue;
	267	if (chan->flags & IEEE80211_CHAN_DISABLED)
	268	continue;
1fe4517c	269	new_chan = chan;
04a773ad JB	270	break;
	271	}
	272
1fe4517c	273	if (new_chan)
04a773ad JB	274	break;
	275	}
	276
1fe4517c	277	if (!new_chan)
04a773ad	278	return -EINVAL;
1fe4517c SW	279
	280	cfg80211_chandef_create(&wdev->wext.ibss.chandef, new_chan,
	281	NL80211_CHAN_NO_HT);
04a773ad JB	282	}
	283
	284	/* don't join -- SSID is not there */
cbe8fa9c	285	if (!wdev->wext.ibss.ssid_len)
04a773ad JB	286	return 0;
	287
	288	if (!netif_running(wdev->netdev))
	289	return 0;
	290
89b706fb	291	if (wdev->wext.keys)
fffd0934 JB	292	wdev->wext.keys->def = wdev->wext.default_key;
	293
	294	wdev->wext.ibss.privacy = wdev->wext.default_key != -1;
	295
f1c1f17a	296	if (wdev->wext.keys && wdev->wext.keys->def != -1) {
fffd0934 JB	297	ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL);
	298	if (!ck)
	299	return -ENOMEM;
b8676221	300	for (i = 0; i < CFG80211_MAX_WEP_KEYS; i++)
fffd0934 JB	301	ck->params[i].key = ck->data[i];
	302	}
	303	err = __cfg80211_join_ibss(rdev, wdev->netdev,
	304	&wdev->wext.ibss, ck);
	305	if (err)
	306	kfree(ck);
	307
	308	return err;
04a773ad JB	309	}
	310
	311	int cfg80211_ibss_wext_siwfreq(struct net_device *dev,
	312	struct iw_request_info *info,
59bbb6f7	313	struct iw_freq wextfreq, char extra)
04a773ad JB	314	{
04a773ad JB	315	struct wireless_dev *wdev = dev->ieee80211_ptr;
f26cbf40	316	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
59bbb6f7 JB	317	struct ieee80211_channel *chan = NULL;
59bbb6f7 JB	318	int err, freq;
04a773ad JB	319
	320	/* call only for ibss! */
	321	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	322	return -EINVAL;
	323
59bbb6f7	324	if (!rdev->ops->join_ibss)
04a773ad JB	325	return -EOPNOTSUPP;
04a773ad JB	326
96998e3a	327	freq = cfg80211_wext_freq(wextfreq);
59bbb6f7 JB	328	if (freq < 0)
59bbb6f7 JB	329	return freq;
04a773ad	330
59bbb6f7 JB	331	if (freq) {
	332	chan = ieee80211_get_channel(wdev->wiphy, freq);
	333	if (!chan)
	334	return -EINVAL;
8fe02e16	335	if (chan->flags & IEEE80211_CHAN_NO_IR \|\|
59bbb6f7 JB	336	chan->flags & IEEE80211_CHAN_DISABLED)
	337	return -EINVAL;
	338	}
04a773ad	339
683b6d3b	340	if (wdev->wext.ibss.chandef.chan == chan)
04a773ad JB	341	return 0;
04a773ad JB	342
667503dd JB	343	wdev_lock(wdev);
	344	err = 0;
	345	if (wdev->ssid_len)
59bbb6f7	346	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	347	wdev_unlock(wdev);
	348
	349	if (err)
	350	return err;
04a773ad JB	351
04a773ad JB	352	if (chan) {
1fe4517c SW	353	cfg80211_chandef_create(&wdev->wext.ibss.chandef, chan,
1fe4517c SW	354	NL80211_CHAN_NO_HT);
cbe8fa9c	355	wdev->wext.ibss.channel_fixed = true;
04a773ad JB	356	} else {
04a773ad JB	357	/* cfg80211_ibss_wext_join will pick one if needed */
cbe8fa9c	358	wdev->wext.ibss.channel_fixed = false;
04a773ad JB	359	}
04a773ad JB	360
fffd0934	361	wdev_lock(wdev);
59bbb6f7	362	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934 JB	363	wdev_unlock(wdev);
	364
	365	return err;
04a773ad	366	}
04a773ad JB	367
	368	int cfg80211_ibss_wext_giwfreq(struct net_device *dev,
	369	struct iw_request_info *info,
	370	struct iw_freq freq, char extra)
	371	{
	372	struct wireless_dev *wdev = dev->ieee80211_ptr;
	373	struct ieee80211_channel *chan = NULL;
	374
	375	/* call only for ibss! */
	376	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	377	return -EINVAL;
	378
667503dd	379	wdev_lock(wdev);
04a773ad	380	if (wdev->current_bss)
19957bb3	381	chan = wdev->current_bss->pub.channel;
683b6d3b JB	382	else if (wdev->wext.ibss.chandef.chan)
683b6d3b JB	383	chan = wdev->wext.ibss.chandef.chan;
667503dd	384	wdev_unlock(wdev);
04a773ad JB	385
	386	if (chan) {
	387	freq->m = chan->center_freq;
	388	freq->e = 6;
	389	return 0;
	390	}
	391
	392	/* no channel if not joining */
	393	return -EINVAL;
	394	}
04a773ad JB	395
	396	int cfg80211_ibss_wext_siwessid(struct net_device *dev,
	397	struct iw_request_info *info,
	398	struct iw_point data, char ssid)
	399	{
	400	struct wireless_dev *wdev = dev->ieee80211_ptr;
f26cbf40	401	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
04a773ad JB	402	size_t len = data->length;
	403	int err;
	404
	405	/* call only for ibss! */
	406	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	407	return -EINVAL;
	408
59bbb6f7	409	if (!rdev->ops->join_ibss)
04a773ad JB	410	return -EOPNOTSUPP;
04a773ad JB	411
667503dd JB	412	wdev_lock(wdev);
	413	err = 0;
	414	if (wdev->ssid_len)
59bbb6f7	415	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	416	wdev_unlock(wdev);
	417
	418	if (err)
	419	return err;
04a773ad JB	420
	421	/* iwconfig uses nul termination in SSID.. */
	422	if (len > 0 && ssid[len - 1] == '\0')
	423	len--;
	424
c1e5f471	425	memcpy(wdev->ssid, ssid, len);
cbe8fa9c	426	wdev->wext.ibss.ssid = wdev->ssid;
cbe8fa9c	427	wdev->wext.ibss.ssid_len = len;
04a773ad	428
fffd0934	429	wdev_lock(wdev);
59bbb6f7	430	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934 JB	431	wdev_unlock(wdev);
	432
	433	return err;
04a773ad	434	}
04a773ad JB	435
	436	int cfg80211_ibss_wext_giwessid(struct net_device *dev,
	437	struct iw_request_info *info,
	438	struct iw_point data, char ssid)
	439	{
	440	struct wireless_dev *wdev = dev->ieee80211_ptr;
	441
	442	/* call only for ibss! */
	443	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	444	return -EINVAL;
	445
	446	data->flags = 0;
	447
667503dd	448	wdev_lock(wdev);
04a773ad JB	449	if (wdev->ssid_len) {
	450	data->flags = 1;
	451	data->length = wdev->ssid_len;
	452	memcpy(ssid, wdev->ssid, data->length);
cbe8fa9c	453	} else if (wdev->wext.ibss.ssid && wdev->wext.ibss.ssid_len) {
04a773ad	454	data->flags = 1;
cbe8fa9c JB	455	data->length = wdev->wext.ibss.ssid_len;
cbe8fa9c JB	456	memcpy(ssid, wdev->wext.ibss.ssid, data->length);
04a773ad	457	}
667503dd	458	wdev_unlock(wdev);
04a773ad JB	459
	460	return 0;
	461	}
04a773ad JB	462
	463	int cfg80211_ibss_wext_siwap(struct net_device *dev,
	464	struct iw_request_info *info,
	465	struct sockaddr ap_addr, char extra)
	466	{
	467	struct wireless_dev *wdev = dev->ieee80211_ptr;
f26cbf40	468	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
04a773ad JB	469	u8 *bssid = ap_addr->sa_data;
	470	int err;
	471
	472	/* call only for ibss! */
	473	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	474	return -EINVAL;
	475
59bbb6f7	476	if (!rdev->ops->join_ibss)
04a773ad JB	477	return -EOPNOTSUPP;
	478
	479	if (ap_addr->sa_family != ARPHRD_ETHER)
	480	return -EINVAL;
	481
	482	/* automatic mode */
	483	if (is_zero_ether_addr(bssid) \|\| is_broadcast_ether_addr(bssid))
	484	bssid = NULL;
	485
74f82741 JB	486	if (bssid && !is_valid_ether_addr(bssid))
	487	return -EINVAL;
	488
04a773ad	489	/* both automatic */
cbe8fa9c	490	if (!bssid && !wdev->wext.ibss.bssid)
04a773ad JB	491	return 0;
	492
	493	/* fixed already - and no change */
cbe8fa9c	494	if (wdev->wext.ibss.bssid && bssid &&
ac422d3c	495	ether_addr_equal(bssid, wdev->wext.ibss.bssid))
04a773ad JB	496	return 0;
04a773ad JB	497
667503dd JB	498	wdev_lock(wdev);
	499	err = 0;
	500	if (wdev->ssid_len)
59bbb6f7	501	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	502	wdev_unlock(wdev);
	503
	504	if (err)
	505	return err;
04a773ad JB	506
04a773ad JB	507	if (bssid) {
cbe8fa9c JB	508	memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
cbe8fa9c JB	509	wdev->wext.ibss.bssid = wdev->wext.bssid;
04a773ad	510	} else
cbe8fa9c	511	wdev->wext.ibss.bssid = NULL;
04a773ad	512
fffd0934	513	wdev_lock(wdev);
59bbb6f7	514	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934 JB	515	wdev_unlock(wdev);
	516
	517	return err;
04a773ad	518	}
04a773ad JB	519
	520	int cfg80211_ibss_wext_giwap(struct net_device *dev,
	521	struct iw_request_info *info,
	522	struct sockaddr ap_addr, char extra)
	523	{
	524	struct wireless_dev *wdev = dev->ieee80211_ptr;
	525
	526	/* call only for ibss! */
	527	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	528	return -EINVAL;
	529
	530	ap_addr->sa_family = ARPHRD_ETHER;
	531
667503dd	532	wdev_lock(wdev);
7ebbe6bd	533	if (wdev->current_bss)
19957bb3	534	memcpy(ap_addr->sa_data, wdev->current_bss->pub.bssid, ETH_ALEN);
80e5b06a	535	else if (wdev->wext.ibss.bssid)
cbe8fa9c	536	memcpy(ap_addr->sa_data, wdev->wext.ibss.bssid, ETH_ALEN);
80e5b06a	537	else
d2beae10	538	eth_zero_addr(ap_addr->sa_data);
80e5b06a	539
667503dd JB	540	wdev_unlock(wdev);
667503dd JB	541
04a773ad JB	542	return 0;
04a773ad JB	543	}
04a773ad	544	#endif