[mirror_ubuntu-bionic-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 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->current_bss->pub);
	}

	cfg80211_hold_bss(bss_from_pub(bss));
	wdev->current_bss = bss_from_pub(bss);

	wdev->sme_state = CFG80211_SME_CONNECTED;
	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;

	CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTING);

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

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

	spin_lock_irqsave(&wdev->event_lock, flags);
	list_add_tail(&ev->list, &wdev->event_list);
	spin_unlock_irqrestore(&wdev->event_lock, flags);
	queue_work(cfg80211_wq, &rdev->event_work);
}
EXPORT_SYMBOL(cfg80211_ibss_joined);

int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
			 struct net_device *dev,
			 struct cfg80211_ibss_params *params,
			 struct cfg80211_cached_keys *connkeys)
{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	int err;

	ASSERT_WDEV_LOCK(wdev);

	if (wdev->ssid_len)
		return -EALREADY;

	if (!params->basic_rates) {
		/*
		* If no rates were explicitly configured,
		* use the mandatory rate set for 11b or
		* 11a for maximum compatibility.
		*/
		struct ieee80211_supported_band *sband =
			rdev->wiphy.bands[params->channel->band];
		int j;
		u32 flag = params->channel->band == IEEE80211_BAND_5GHZ ?
			IEEE80211_RATE_MANDATORY_A :
			IEEE80211_RATE_MANDATORY_B;

		for (j = 0; j < sband->n_bitrates; j++) {
			if (sband->bitrates[j].flags & flag)
				params->basic_rates |= BIT(j);
		}
	}

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

	wdev->ibss_fixed = params->channel_fixed;
#ifdef CONFIG_CFG80211_WEXT
	wdev->wext.ibss.channel = params->channel;
#endif
	wdev->sme_state = CFG80211_SME_CONNECTING;

	err = cfg80211_can_use_chan(rdev, wdev, params->channel,
				    params->channel_fixed
				    ? CHAN_MODE_SHARED
				    : CHAN_MODE_EXCLUSIVE);
	if (err) {
		wdev->connect_keys = NULL;
		return err;
	}

	err = rdev_join_ibss(rdev, dev, params);
	if (err) {
		wdev->connect_keys = NULL;
		wdev->sme_state = CFG80211_SME_IDLE;
		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;

	mutex_lock(&rdev->devlist_mtx);
	wdev_lock(wdev);
	err = __cfg80211_join_ibss(rdev, dev, params, connkeys);
	wdev_unlock(wdev);
	mutex_unlock(&rdev->devlist_mtx);

	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->current_bss->pub);
	}

	wdev->current_bss = NULL;
	wdev->sme_state = CFG80211_SME_IDLE;
	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.channel) {
		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.channel = chan;
				break;
			}

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

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

	mutex_lock(&rdev->devlist_mtx);
	wdev_lock(wdev);
	err = cfg80211_ibss_wext_join(rdev, wdev);
	wdev_unlock(wdev);
	mutex_unlock(&rdev->devlist_mtx);

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

	mutex_lock(&rdev->devlist_mtx);
	wdev_lock(wdev);
	err = cfg80211_ibss_wext_join(rdev, wdev);
	wdev_unlock(wdev);
	mutex_unlock(&rdev->devlist_mtx);

	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;

	mutex_lock(&rdev->devlist_mtx);
	wdev_lock(wdev);
	err = cfg80211_ibss_wext_join(rdev, wdev);
	wdev_unlock(wdev);
	mutex_unlock(&rdev->devlist_mtx);

	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);
19957bb3	40	cfg80211_put_bss(&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
28f33366	46	wdev->sme_state = CFG80211_SME_CONNECTED;
fffd0934 JB	47	cfg80211_upload_connect_keys(wdev);
fffd0934 JB	48
667503dd JB	49	nl80211_send_ibss_bssid(wiphy_to_dev(wdev->wiphy), dev, bssid,
667503dd JB	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 JB	57
	58	void cfg80211_ibss_joined(struct net_device dev, const u8 bssid, gfp_t gfp)
	59	{
	60	struct wireless_dev *wdev = dev->ieee80211_ptr;
	61	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
	62	struct cfg80211_event *ev;
	63	unsigned long flags;
	64
28f33366	65	CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTING);
f7969969	66
667503dd JB	67	ev = kzalloc(sizeof(*ev), gfp);
	68	if (!ev)
	69	return;
	70
	71	ev->type = EVENT_IBSS_JOINED;
	72	memcpy(ev->cr.bssid, bssid, ETH_ALEN);
	73
	74	spin_lock_irqsave(&wdev->event_lock, flags);
	75	list_add_tail(&ev->list, &wdev->event_list);
	76	spin_unlock_irqrestore(&wdev->event_lock, flags);
e60d7443	77	queue_work(cfg80211_wq, &rdev->event_work);
667503dd	78	}
04a773ad JB	79	EXPORT_SYMBOL(cfg80211_ibss_joined);
04a773ad JB	80
667503dd JB	81	int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
667503dd JB	82	struct net_device *dev,
fffd0934 JB	83	struct cfg80211_ibss_params *params,
fffd0934 JB	84	struct cfg80211_cached_keys *connkeys)
04a773ad JB	85	{
	86	struct wireless_dev *wdev = dev->ieee80211_ptr;
	87	int err;
	88
667503dd JB	89	ASSERT_WDEV_LOCK(wdev);
667503dd JB	90
04a773ad JB	91	if (wdev->ssid_len)
	92	return -EALREADY;
	93
93b05238 JB	94	if (!params->basic_rates) {
	95	/*
	96	* If no rates were explicitly configured,
	97	* use the mandatory rate set for 11b or
	98	* 11a for maximum compatibility.
	99	*/
	100	struct ieee80211_supported_band *sband =
	101	rdev->wiphy.bands[params->channel->band];
	102	int j;
	103	u32 flag = params->channel->band == IEEE80211_BAND_5GHZ ?
	104	IEEE80211_RATE_MANDATORY_A :
	105	IEEE80211_RATE_MANDATORY_B;
	106
	107	for (j = 0; j < sband->n_bitrates; j++) {
	108	if (sband->bitrates[j].flags & flag)
	109	params->basic_rates \|= BIT(j);
	110	}
	111	}
	112
fffd0934 JB	113	if (WARN_ON(wdev->connect_keys))
	114	kfree(wdev->connect_keys);
	115	wdev->connect_keys = connkeys;
	116
c30a3d38	117	wdev->ibss_fixed = params->channel_fixed;
3d23e349	118	#ifdef CONFIG_CFG80211_WEXT
cbe8fa9c	119	wdev->wext.ibss.channel = params->channel;
04a773ad	120	#endif
28f33366	121	wdev->sme_state = CFG80211_SME_CONNECTING;
e4e32459 MK	122
	123	err = cfg80211_can_use_chan(rdev, wdev, params->channel,
	124	params->channel_fixed
	125	? CHAN_MODE_SHARED
	126	: CHAN_MODE_EXCLUSIVE);
	127	if (err) {
	128	wdev->connect_keys = NULL;
	129	return err;
	130	}
	131
e35e4d28	132	err = rdev_join_ibss(rdev, dev, params);
fffd0934 JB	133	if (err) {
fffd0934 JB	134	wdev->connect_keys = NULL;
28f33366	135	wdev->sme_state = CFG80211_SME_IDLE;
04a773ad	136	return err;
fffd0934	137	}
04a773ad JB	138
	139	memcpy(wdev->ssid, params->ssid, params->ssid_len);
	140	wdev->ssid_len = params->ssid_len;
	141
	142	return 0;
	143	}
	144
667503dd JB	145	int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
667503dd JB	146	struct net_device *dev,
fffd0934 JB	147	struct cfg80211_ibss_params *params,
fffd0934 JB	148	struct cfg80211_cached_keys *connkeys)
667503dd JB	149	{
	150	struct wireless_dev *wdev = dev->ieee80211_ptr;
	151	int err;
	152
59bbb6f7	153	mutex_lock(&rdev->devlist_mtx);
667503dd	154	wdev_lock(wdev);
fffd0934	155	err = __cfg80211_join_ibss(rdev, dev, params, connkeys);
667503dd	156	wdev_unlock(wdev);
59bbb6f7	157	mutex_unlock(&rdev->devlist_mtx);
667503dd JB	158
	159	return err;
	160	}
	161
	162	static void __cfg80211_clear_ibss(struct net_device *dev, bool nowext)
04a773ad JB	163	{
04a773ad JB	164	struct wireless_dev *wdev = dev->ieee80211_ptr;
fffd0934 JB	165	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
fffd0934 JB	166	int i;
04a773ad	167
667503dd JB	168	ASSERT_WDEV_LOCK(wdev);
667503dd JB	169
fffd0934 JB	170	kfree(wdev->connect_keys);
	171	wdev->connect_keys = NULL;
	172
	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);
19957bb3	183	cfg80211_put_bss(&wdev->current_bss->pub);
04a773ad JB	184	}
	185
	186	wdev->current_bss = NULL;
28f33366	187	wdev->sme_state = CFG80211_SME_IDLE;
04a773ad	188	wdev->ssid_len = 0;
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;
04a773ad	243	enum ieee80211_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 ... */
cbe8fa9c	252	if (!wdev->wext.ibss.channel) {
04a773ad JB	253	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
	254	struct ieee80211_supported_band *sband;
	255	struct ieee80211_channel *chan;
	256
	257	sband = rdev->wiphy.bands[band];
	258	if (!sband)
	259	continue;
	260
	261	for (i = 0; i < sband->n_channels; i++) {
	262	chan = &sband->channels[i];
	263	if (chan->flags & IEEE80211_CHAN_NO_IBSS)
	264	continue;
	265	if (chan->flags & IEEE80211_CHAN_DISABLED)
	266	continue;
cbe8fa9c	267	wdev->wext.ibss.channel = chan;
04a773ad JB	268	break;
	269	}
	270
cbe8fa9c	271	if (wdev->wext.ibss.channel)
04a773ad JB	272	break;
	273	}
	274
cbe8fa9c	275	if (!wdev->wext.ibss.channel)
04a773ad JB	276	return -EINVAL;
	277	}
	278
	279	/* don't join -- SSID is not there */
cbe8fa9c	280	if (!wdev->wext.ibss.ssid_len)
04a773ad JB	281	return 0;
	282
	283	if (!netif_running(wdev->netdev))
	284	return 0;
	285
3be61a38	286	if (wdev->wext.keys) {
fffd0934	287	wdev->wext.keys->def = wdev->wext.default_key;
3be61a38 JB	288	wdev->wext.keys->defmgmt = wdev->wext.default_mgmt_key;
3be61a38 JB	289	}
fffd0934 JB	290
	291	wdev->wext.ibss.privacy = wdev->wext.default_key != -1;
	292
	293	if (wdev->wext.keys) {
	294	ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL);
	295	if (!ck)
	296	return -ENOMEM;
	297	for (i = 0; i < 6; i++)
	298	ck->params[i].key = ck->data[i];
	299	}
	300	err = __cfg80211_join_ibss(rdev, wdev->netdev,
	301	&wdev->wext.ibss, ck);
	302	if (err)
	303	kfree(ck);
	304
	305	return err;
04a773ad JB	306	}
	307
	308	int cfg80211_ibss_wext_siwfreq(struct net_device *dev,
	309	struct iw_request_info *info,
59bbb6f7	310	struct iw_freq wextfreq, char extra)
04a773ad JB	311	{
04a773ad JB	312	struct wireless_dev *wdev = dev->ieee80211_ptr;
59bbb6f7 JB	313	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
	314	struct ieee80211_channel *chan = NULL;
	315	int err, freq;
04a773ad JB	316
	317	/* call only for ibss! */
	318	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	319	return -EINVAL;
	320
59bbb6f7	321	if (!rdev->ops->join_ibss)
04a773ad JB	322	return -EOPNOTSUPP;
04a773ad JB	323
59bbb6f7 JB	324	freq = cfg80211_wext_freq(wdev->wiphy, wextfreq);
	325	if (freq < 0)
	326	return freq;
04a773ad	327
59bbb6f7 JB	328	if (freq) {
	329	chan = ieee80211_get_channel(wdev->wiphy, freq);
	330	if (!chan)
	331	return -EINVAL;
	332	if (chan->flags & IEEE80211_CHAN_NO_IBSS \|\|
	333	chan->flags & IEEE80211_CHAN_DISABLED)
	334	return -EINVAL;
	335	}
04a773ad	336
cbe8fa9c	337	if (wdev->wext.ibss.channel == chan)
04a773ad JB	338	return 0;
04a773ad JB	339
667503dd JB	340	wdev_lock(wdev);
	341	err = 0;
	342	if (wdev->ssid_len)
59bbb6f7	343	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	344	wdev_unlock(wdev);
	345
	346	if (err)
	347	return err;
04a773ad JB	348
04a773ad JB	349	if (chan) {
cbe8fa9c JB	350	wdev->wext.ibss.channel = chan;
cbe8fa9c JB	351	wdev->wext.ibss.channel_fixed = true;
04a773ad JB	352	} else {
04a773ad JB	353	/* cfg80211_ibss_wext_join will pick one if needed */
cbe8fa9c	354	wdev->wext.ibss.channel_fixed = false;
04a773ad JB	355	}
04a773ad JB	356
59bbb6f7	357	mutex_lock(&rdev->devlist_mtx);
fffd0934	358	wdev_lock(wdev);
59bbb6f7	359	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934	360	wdev_unlock(wdev);
59bbb6f7	361	mutex_unlock(&rdev->devlist_mtx);
fffd0934 JB	362
fffd0934 JB	363	return err;
04a773ad	364	}
04a773ad JB	365
	366	int cfg80211_ibss_wext_giwfreq(struct net_device *dev,
	367	struct iw_request_info *info,
	368	struct iw_freq freq, char extra)
	369	{
	370	struct wireless_dev *wdev = dev->ieee80211_ptr;
	371	struct ieee80211_channel *chan = NULL;
	372
	373	/* call only for ibss! */
	374	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	375	return -EINVAL;
	376
667503dd	377	wdev_lock(wdev);
04a773ad	378	if (wdev->current_bss)
19957bb3	379	chan = wdev->current_bss->pub.channel;
cbe8fa9c JB	380	else if (wdev->wext.ibss.channel)
cbe8fa9c JB	381	chan = wdev->wext.ibss.channel;
667503dd	382	wdev_unlock(wdev);
04a773ad JB	383
	384	if (chan) {
	385	freq->m = chan->center_freq;
	386	freq->e = 6;
	387	return 0;
	388	}
	389
	390	/* no channel if not joining */
	391	return -EINVAL;
	392	}
04a773ad JB	393
	394	int cfg80211_ibss_wext_siwessid(struct net_device *dev,
	395	struct iw_request_info *info,
	396	struct iw_point data, char ssid)
	397	{
	398	struct wireless_dev *wdev = dev->ieee80211_ptr;
59bbb6f7	399	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
04a773ad JB	400	size_t len = data->length;
	401	int err;
	402
	403	/* call only for ibss! */
	404	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	405	return -EINVAL;
	406
59bbb6f7	407	if (!rdev->ops->join_ibss)
04a773ad JB	408	return -EOPNOTSUPP;
04a773ad JB	409
667503dd JB	410	wdev_lock(wdev);
	411	err = 0;
	412	if (wdev->ssid_len)
59bbb6f7	413	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	414	wdev_unlock(wdev);
	415
	416	if (err)
	417	return err;
04a773ad JB	418
	419	/* iwconfig uses nul termination in SSID.. */
	420	if (len > 0 && ssid[len - 1] == '\0')
	421	len--;
	422
cbe8fa9c JB	423	wdev->wext.ibss.ssid = wdev->ssid;
	424	memcpy(wdev->wext.ibss.ssid, ssid, len);
	425	wdev->wext.ibss.ssid_len = len;
04a773ad	426
59bbb6f7	427	mutex_lock(&rdev->devlist_mtx);
fffd0934	428	wdev_lock(wdev);
59bbb6f7	429	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934	430	wdev_unlock(wdev);
59bbb6f7	431	mutex_unlock(&rdev->devlist_mtx);
fffd0934 JB	432
fffd0934 JB	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;
59bbb6f7	468	struct cfg80211_registered_device *rdev = wiphy_to_dev(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
	486	/* both automatic */
cbe8fa9c	487	if (!bssid && !wdev->wext.ibss.bssid)
04a773ad JB	488	return 0;
	489
	490	/* fixed already - and no change */
cbe8fa9c	491	if (wdev->wext.ibss.bssid && bssid &&
ac422d3c	492	ether_addr_equal(bssid, wdev->wext.ibss.bssid))
04a773ad JB	493	return 0;
04a773ad JB	494
667503dd JB	495	wdev_lock(wdev);
	496	err = 0;
	497	if (wdev->ssid_len)
59bbb6f7	498	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	499	wdev_unlock(wdev);
	500
	501	if (err)
	502	return err;
04a773ad JB	503
04a773ad JB	504	if (bssid) {
cbe8fa9c JB	505	memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
cbe8fa9c JB	506	wdev->wext.ibss.bssid = wdev->wext.bssid;
04a773ad	507	} else
cbe8fa9c	508	wdev->wext.ibss.bssid = NULL;
04a773ad	509
59bbb6f7	510	mutex_lock(&rdev->devlist_mtx);
fffd0934	511	wdev_lock(wdev);
59bbb6f7	512	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934	513	wdev_unlock(wdev);
59bbb6f7	514	mutex_unlock(&rdev->devlist_mtx);
fffd0934 JB	515
fffd0934 JB	516	return err;
04a773ad	517	}
04a773ad JB	518
	519	int cfg80211_ibss_wext_giwap(struct net_device *dev,
	520	struct iw_request_info *info,
	521	struct sockaddr ap_addr, char extra)
	522	{
	523	struct wireless_dev *wdev = dev->ieee80211_ptr;
	524
	525	/* call only for ibss! */
	526	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	527	return -EINVAL;
	528
	529	ap_addr->sa_family = ARPHRD_ETHER;
	530
667503dd	531	wdev_lock(wdev);
7ebbe6bd	532	if (wdev->current_bss)
19957bb3	533	memcpy(ap_addr->sa_data, wdev->current_bss->pub.bssid, ETH_ALEN);
80e5b06a	534	else if (wdev->wext.ibss.bssid)
cbe8fa9c	535	memcpy(ap_addr->sa_data, wdev->wext.ibss.bssid, ETH_ALEN);
80e5b06a ZY	536	else
	537	memset(ap_addr->sa_data, 0, ETH_ALEN);
	538
667503dd JB	539	wdev_unlock(wdev);
667503dd JB	540
04a773ad JB	541	return 0;
04a773ad JB	542	}
04a773ad	543	#endif