[linux-2.6-block.git] / net / wireless / ibss.c

// SPDX-License-Identifier: GPL-2.0
/*
 * 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;
	if (connkeys) {
		params->wep_keys = connkeys->params;
		params->wep_tx_key = connkeys->def;
	}

#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
b2441318	1	// SPDX-License-Identifier: GPL-2.0
04a773ad JB	2	/*
	3	* Some IBSS support code for cfg80211.
	4	*
	5	* Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
	6	*/
	7
	8	#include <linux/etherdevice.h>
	9	#include <linux/if_arp.h>
5a0e3ad6	10	#include <linux/slab.h>
bc3b2d7f	11	#include <linux/export.h>
04a773ad	12	#include <net/cfg80211.h>
0e82ffe3	13	#include "wext-compat.h"
04a773ad	14	#include "nl80211.h"
e35e4d28	15	#include "rdev-ops.h"
04a773ad JB	16
04a773ad JB	17
fe94f3a4 AQ	18	void __cfg80211_ibss_joined(struct net_device dev, const u8 bssid,
fe94f3a4 AQ	19	struct ieee80211_channel *channel)
04a773ad JB	20	{
	21	struct wireless_dev *wdev = dev->ieee80211_ptr;
	22	struct cfg80211_bss *bss;
3d23e349	23	#ifdef CONFIG_CFG80211_WEXT
04a773ad JB	24	union iwreq_data wrqu;
	25	#endif
	26
	27	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	28	return;
	29
f7969969	30	if (!wdev->ssid_len)
04a773ad JB	31	return;
04a773ad JB	32
fe94f3a4	33	bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, NULL, 0,
6eb18137	34	IEEE80211_BSS_TYPE_IBSS, IEEE80211_PRIVACY_ANY);
04a773ad JB	35
	36	if (WARN_ON(!bss))
	37	return;
	38
	39	if (wdev->current_bss) {
	40	cfg80211_unhold_bss(wdev->current_bss);
5b112d3d	41	cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
04a773ad JB	42	}
04a773ad JB	43
19957bb3 JB	44	cfg80211_hold_bss(bss_from_pub(bss));
19957bb3 JB	45	wdev->current_bss = bss_from_pub(bss);
04a773ad	46
b8676221 DS	47	if (!(wdev->wiphy->flags & WIPHY_FLAG_HAS_STATIC_WEP))
b8676221 DS	48	cfg80211_upload_connect_keys(wdev);
fffd0934	49
f26cbf40	50	nl80211_send_ibss_bssid(wiphy_to_rdev(wdev->wiphy), dev, bssid,
667503dd	51	GFP_KERNEL);
3d23e349	52	#ifdef CONFIG_CFG80211_WEXT
04a773ad JB	53	memset(&wrqu, 0, sizeof(wrqu));
	54	memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
	55	wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
	56	#endif
	57	}
667503dd	58
fe94f3a4 AQ	59	void cfg80211_ibss_joined(struct net_device dev, const u8 bssid,
fe94f3a4 AQ	60	struct ieee80211_channel *channel, gfp_t gfp)
667503dd JB	61	{
667503dd JB	62	struct wireless_dev *wdev = dev->ieee80211_ptr;
f26cbf40	63	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
667503dd JB	64	struct cfg80211_event *ev;
	65	unsigned long flags;
	66
fe94f3a4 AQ	67	trace_cfg80211_ibss_joined(dev, bssid, channel);
	68
	69	if (WARN_ON(!channel))
	70	return;
4ee3e063	71
667503dd JB	72	ev = kzalloc(sizeof(*ev), gfp);
	73	if (!ev)
	74	return;
	75
	76	ev->type = EVENT_IBSS_JOINED;
fe94f3a4 AQ	77	memcpy(ev->ij.bssid, bssid, ETH_ALEN);
fe94f3a4 AQ	78	ev->ij.channel = channel;
667503dd JB	79
	80	spin_lock_irqsave(&wdev->event_lock, flags);
	81	list_add_tail(&ev->list, &wdev->event_list);
	82	spin_unlock_irqrestore(&wdev->event_lock, flags);
e60d7443	83	queue_work(cfg80211_wq, &rdev->event_work);
667503dd	84	}
04a773ad JB	85	EXPORT_SYMBOL(cfg80211_ibss_joined);
04a773ad JB	86
2316d7b0 ZG	87	static int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
	88	struct net_device *dev,
	89	struct cfg80211_ibss_params *params,
	90	struct cfg80211_cached_keys *connkeys)
04a773ad JB	91	{
	92	struct wireless_dev *wdev = dev->ieee80211_ptr;
	93	int err;
	94
667503dd JB	95	ASSERT_WDEV_LOCK(wdev);
667503dd JB	96
04a773ad JB	97	if (wdev->ssid_len)
	98	return -EALREADY;
	99
93b05238 JB	100	if (!params->basic_rates) {
	101	/*
	102	* If no rates were explicitly configured,
	103	* use the mandatory rate set for 11b or
	104	* 11a for maximum compatibility.
	105	*/
	106	struct ieee80211_supported_band *sband =
683b6d3b	107	rdev->wiphy.bands[params->chandef.chan->band];
93b05238	108	int j;
57fbcce3	109	u32 flag = params->chandef.chan->band == NL80211_BAND_5GHZ ?
93b05238 JB	110	IEEE80211_RATE_MANDATORY_A :
	111	IEEE80211_RATE_MANDATORY_B;
	112
	113	for (j = 0; j < sband->n_bitrates; j++) {
	114	if (sband->bitrates[j].flags & flag)
	115	params->basic_rates \|= BIT(j);
	116	}
	117	}
	118
f1c1f17a JB	119	if (WARN_ON(connkeys && connkeys->def < 0))
	120	return -EINVAL;
	121
fffd0934	122	if (WARN_ON(wdev->connect_keys))
b47f610b	123	kzfree(wdev->connect_keys);
fffd0934 JB	124	wdev->connect_keys = connkeys;
fffd0934 JB	125
c30a3d38	126	wdev->ibss_fixed = params->channel_fixed;
5336fa88	127	wdev->ibss_dfs_possible = params->userspace_handles_dfs;
9e0e2961	128	wdev->chandef = params->chandef;
9ae3b172 TM	129	if (connkeys) {
	130	params->wep_keys = connkeys->params;
	131	params->wep_tx_key = connkeys->def;
	132	}
	133
3d23e349	134	#ifdef CONFIG_CFG80211_WEXT
683b6d3b	135	wdev->wext.ibss.chandef = params->chandef;
04a773ad	136	#endif
e35e4d28	137	err = rdev_join_ibss(rdev, dev, params);
fffd0934 JB	138	if (err) {
fffd0934 JB	139	wdev->connect_keys = NULL;
04a773ad	140	return err;
fffd0934	141	}
04a773ad JB	142
	143	memcpy(wdev->ssid, params->ssid, params->ssid_len);
	144	wdev->ssid_len = params->ssid_len;
	145
	146	return 0;
	147	}
	148
667503dd JB	149	int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
667503dd JB	150	struct net_device *dev,
fffd0934 JB	151	struct cfg80211_ibss_params *params,
fffd0934 JB	152	struct cfg80211_cached_keys *connkeys)
667503dd JB	153	{
	154	struct wireless_dev *wdev = dev->ieee80211_ptr;
	155	int err;
	156
5fe231e8 JB	157	ASSERT_RTNL();
5fe231e8 JB	158
667503dd	159	wdev_lock(wdev);
fffd0934	160	err = __cfg80211_join_ibss(rdev, dev, params, connkeys);
667503dd JB	161	wdev_unlock(wdev);
	162
	163	return err;
	164	}
	165
	166	static void __cfg80211_clear_ibss(struct net_device *dev, bool nowext)
04a773ad JB	167	{
04a773ad JB	168	struct wireless_dev *wdev = dev->ieee80211_ptr;
f26cbf40	169	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
fffd0934	170	int i;
04a773ad	171
667503dd JB	172	ASSERT_WDEV_LOCK(wdev);
667503dd JB	173
b47f610b	174	kzfree(wdev->connect_keys);
fffd0934 JB	175	wdev->connect_keys = NULL;
fffd0934 JB	176
fa9ffc74 KP	177	rdev_set_qos_map(rdev, dev, NULL);
fa9ffc74 KP	178
fffd0934 JB	179	/*
	180	* Delete all the keys ... pairwise keys can't really
	181	* exist any more anyway, but default keys might.
	182	*/
	183	if (rdev->ops->del_key)
	184	for (i = 0; i < 6; i++)
e35e4d28	185	rdev_del_key(rdev, dev, i, false, NULL);
fffd0934	186
04a773ad JB	187	if (wdev->current_bss) {
04a773ad JB	188	cfg80211_unhold_bss(wdev->current_bss);
5b112d3d	189	cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
04a773ad JB	190	}
	191
	192	wdev->current_bss = NULL;
	193	wdev->ssid_len = 0;
9e0e2961	194	memset(&wdev->chandef, 0, sizeof(wdev->chandef));
3d23e349	195	#ifdef CONFIG_CFG80211_WEXT
9d308429	196	if (!nowext)
cbe8fa9c	197	wdev->wext.ibss.ssid_len = 0;
9d308429	198	#endif
b35a51c7	199	cfg80211_sched_dfs_chan_update(rdev);
04a773ad JB	200	}
04a773ad JB	201
667503dd JB	202	void cfg80211_clear_ibss(struct net_device *dev, bool nowext)
	203	{
	204	struct wireless_dev *wdev = dev->ieee80211_ptr;
	205
	206	wdev_lock(wdev);
	207	__cfg80211_clear_ibss(dev, nowext);
	208	wdev_unlock(wdev);
	209	}
	210
98d3a7ca JB	211	int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
98d3a7ca JB	212	struct net_device *dev, bool nowext)
04a773ad	213	{
78485475	214	struct wireless_dev *wdev = dev->ieee80211_ptr;
04a773ad JB	215	int err;
04a773ad JB	216
667503dd JB	217	ASSERT_WDEV_LOCK(wdev);
667503dd JB	218
78485475 JB	219	if (!wdev->ssid_len)
	220	return -ENOLINK;
	221
e35e4d28	222	err = rdev_leave_ibss(rdev, dev);
04a773ad JB	223
	224	if (err)
	225	return err;
	226
667503dd	227	__cfg80211_clear_ibss(dev, nowext);
04a773ad JB	228
	229	return 0;
	230	}
	231
667503dd JB	232	int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
	233	struct net_device *dev, bool nowext)
	234	{
	235	struct wireless_dev *wdev = dev->ieee80211_ptr;
	236	int err;
	237
	238	wdev_lock(wdev);
	239	err = __cfg80211_leave_ibss(rdev, dev, nowext);
	240	wdev_unlock(wdev);
	241
	242	return err;
	243	}
	244
3d23e349	245	#ifdef CONFIG_CFG80211_WEXT
fffd0934 JB	246	int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
fffd0934 JB	247	struct wireless_dev *wdev)
04a773ad	248	{
fffd0934	249	struct cfg80211_cached_keys *ck = NULL;
57fbcce3	250	enum nl80211_band band;
fffd0934 JB	251	int i, err;
	252
	253	ASSERT_WDEV_LOCK(wdev);
04a773ad	254
cbe8fa9c JB	255	if (!wdev->wext.ibss.beacon_interval)
cbe8fa9c JB	256	wdev->wext.ibss.beacon_interval = 100;
8e30bc55	257
04a773ad	258	/* try to find an IBSS channel if none requested ... */
683b6d3b	259	if (!wdev->wext.ibss.chandef.chan) {
1fe4517c	260	struct ieee80211_channel *new_chan = NULL;
683b6d3b	261
57fbcce3	262	for (band = 0; band < NUM_NL80211_BANDS; band++) {
04a773ad JB	263	struct ieee80211_supported_band *sband;
	264	struct ieee80211_channel *chan;
	265
	266	sband = rdev->wiphy.bands[band];
	267	if (!sband)
	268	continue;
	269
	270	for (i = 0; i < sband->n_channels; i++) {
	271	chan = &sband->channels[i];
8fe02e16	272	if (chan->flags & IEEE80211_CHAN_NO_IR)
04a773ad JB	273	continue;
	274	if (chan->flags & IEEE80211_CHAN_DISABLED)
	275	continue;
1fe4517c	276	new_chan = chan;
04a773ad JB	277	break;
	278	}
	279
1fe4517c	280	if (new_chan)
04a773ad JB	281	break;
	282	}
	283
1fe4517c	284	if (!new_chan)
04a773ad	285	return -EINVAL;
1fe4517c SW	286
	287	cfg80211_chandef_create(&wdev->wext.ibss.chandef, new_chan,
	288	NL80211_CHAN_NO_HT);
04a773ad JB	289	}
	290
	291	/* don't join -- SSID is not there */
cbe8fa9c	292	if (!wdev->wext.ibss.ssid_len)
04a773ad JB	293	return 0;
	294
	295	if (!netif_running(wdev->netdev))
	296	return 0;
	297
89b706fb	298	if (wdev->wext.keys)
fffd0934 JB	299	wdev->wext.keys->def = wdev->wext.default_key;
	300
	301	wdev->wext.ibss.privacy = wdev->wext.default_key != -1;
	302
f1c1f17a	303	if (wdev->wext.keys && wdev->wext.keys->def != -1) {
fffd0934 JB	304	ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL);
	305	if (!ck)
	306	return -ENOMEM;
b8676221	307	for (i = 0; i < CFG80211_MAX_WEP_KEYS; i++)
fffd0934 JB	308	ck->params[i].key = ck->data[i];
	309	}
	310	err = __cfg80211_join_ibss(rdev, wdev->netdev,
	311	&wdev->wext.ibss, ck);
	312	if (err)
	313	kfree(ck);
	314
	315	return err;
04a773ad JB	316	}
	317
	318	int cfg80211_ibss_wext_siwfreq(struct net_device *dev,
	319	struct iw_request_info *info,
59bbb6f7	320	struct iw_freq wextfreq, char extra)
04a773ad JB	321	{
04a773ad JB	322	struct wireless_dev *wdev = dev->ieee80211_ptr;
f26cbf40	323	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
59bbb6f7 JB	324	struct ieee80211_channel *chan = NULL;
59bbb6f7 JB	325	int err, freq;
04a773ad JB	326
	327	/* call only for ibss! */
	328	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	329	return -EINVAL;
	330
59bbb6f7	331	if (!rdev->ops->join_ibss)
04a773ad JB	332	return -EOPNOTSUPP;
04a773ad JB	333
96998e3a	334	freq = cfg80211_wext_freq(wextfreq);
59bbb6f7 JB	335	if (freq < 0)
59bbb6f7 JB	336	return freq;
04a773ad	337
59bbb6f7 JB	338	if (freq) {
	339	chan = ieee80211_get_channel(wdev->wiphy, freq);
	340	if (!chan)
	341	return -EINVAL;
8fe02e16	342	if (chan->flags & IEEE80211_CHAN_NO_IR \|\|
59bbb6f7 JB	343	chan->flags & IEEE80211_CHAN_DISABLED)
	344	return -EINVAL;
	345	}
04a773ad	346
683b6d3b	347	if (wdev->wext.ibss.chandef.chan == chan)
04a773ad JB	348	return 0;
04a773ad JB	349
667503dd JB	350	wdev_lock(wdev);
	351	err = 0;
	352	if (wdev->ssid_len)
59bbb6f7	353	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	354	wdev_unlock(wdev);
	355
	356	if (err)
	357	return err;
04a773ad JB	358
04a773ad JB	359	if (chan) {
1fe4517c SW	360	cfg80211_chandef_create(&wdev->wext.ibss.chandef, chan,
1fe4517c SW	361	NL80211_CHAN_NO_HT);
cbe8fa9c	362	wdev->wext.ibss.channel_fixed = true;
04a773ad JB	363	} else {
04a773ad JB	364	/* cfg80211_ibss_wext_join will pick one if needed */
cbe8fa9c	365	wdev->wext.ibss.channel_fixed = false;
04a773ad JB	366	}
04a773ad JB	367
fffd0934	368	wdev_lock(wdev);
59bbb6f7	369	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934 JB	370	wdev_unlock(wdev);
	371
	372	return err;
04a773ad	373	}
04a773ad JB	374
	375	int cfg80211_ibss_wext_giwfreq(struct net_device *dev,
	376	struct iw_request_info *info,
	377	struct iw_freq freq, char extra)
	378	{
	379	struct wireless_dev *wdev = dev->ieee80211_ptr;
	380	struct ieee80211_channel *chan = NULL;
	381
	382	/* call only for ibss! */
	383	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	384	return -EINVAL;
	385
667503dd	386	wdev_lock(wdev);
04a773ad	387	if (wdev->current_bss)
19957bb3	388	chan = wdev->current_bss->pub.channel;
683b6d3b JB	389	else if (wdev->wext.ibss.chandef.chan)
683b6d3b JB	390	chan = wdev->wext.ibss.chandef.chan;
667503dd	391	wdev_unlock(wdev);
04a773ad JB	392
	393	if (chan) {
	394	freq->m = chan->center_freq;
	395	freq->e = 6;
	396	return 0;
	397	}
	398
	399	/* no channel if not joining */
	400	return -EINVAL;
	401	}
04a773ad JB	402
	403	int cfg80211_ibss_wext_siwessid(struct net_device *dev,
	404	struct iw_request_info *info,
	405	struct iw_point data, char ssid)
	406	{
	407	struct wireless_dev *wdev = dev->ieee80211_ptr;
f26cbf40	408	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
04a773ad JB	409	size_t len = data->length;
	410	int err;
	411
	412	/* call only for ibss! */
	413	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	414	return -EINVAL;
	415
59bbb6f7	416	if (!rdev->ops->join_ibss)
04a773ad JB	417	return -EOPNOTSUPP;
04a773ad JB	418
667503dd JB	419	wdev_lock(wdev);
	420	err = 0;
	421	if (wdev->ssid_len)
59bbb6f7	422	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	423	wdev_unlock(wdev);
	424
	425	if (err)
	426	return err;
04a773ad JB	427
	428	/* iwconfig uses nul termination in SSID.. */
	429	if (len > 0 && ssid[len - 1] == '\0')
	430	len--;
	431
c1e5f471	432	memcpy(wdev->ssid, ssid, len);
cbe8fa9c	433	wdev->wext.ibss.ssid = wdev->ssid;
cbe8fa9c	434	wdev->wext.ibss.ssid_len = len;
04a773ad	435
fffd0934	436	wdev_lock(wdev);
59bbb6f7	437	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934 JB	438	wdev_unlock(wdev);
	439
	440	return err;
04a773ad	441	}
04a773ad JB	442
	443	int cfg80211_ibss_wext_giwessid(struct net_device *dev,
	444	struct iw_request_info *info,
	445	struct iw_point data, char ssid)
	446	{
	447	struct wireless_dev *wdev = dev->ieee80211_ptr;
	448
	449	/* call only for ibss! */
	450	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	451	return -EINVAL;
	452
	453	data->flags = 0;
	454
667503dd	455	wdev_lock(wdev);
04a773ad JB	456	if (wdev->ssid_len) {
	457	data->flags = 1;
	458	data->length = wdev->ssid_len;
	459	memcpy(ssid, wdev->ssid, data->length);
cbe8fa9c	460	} else if (wdev->wext.ibss.ssid && wdev->wext.ibss.ssid_len) {
04a773ad	461	data->flags = 1;
cbe8fa9c JB	462	data->length = wdev->wext.ibss.ssid_len;
cbe8fa9c JB	463	memcpy(ssid, wdev->wext.ibss.ssid, data->length);
04a773ad	464	}
667503dd	465	wdev_unlock(wdev);
04a773ad JB	466
	467	return 0;
	468	}
04a773ad JB	469
	470	int cfg80211_ibss_wext_siwap(struct net_device *dev,
	471	struct iw_request_info *info,
	472	struct sockaddr ap_addr, char extra)
	473	{
	474	struct wireless_dev *wdev = dev->ieee80211_ptr;
f26cbf40	475	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
04a773ad JB	476	u8 *bssid = ap_addr->sa_data;
	477	int err;
	478
	479	/* call only for ibss! */
	480	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	481	return -EINVAL;
	482
59bbb6f7	483	if (!rdev->ops->join_ibss)
04a773ad JB	484	return -EOPNOTSUPP;
	485
	486	if (ap_addr->sa_family != ARPHRD_ETHER)
	487	return -EINVAL;
	488
	489	/* automatic mode */
	490	if (is_zero_ether_addr(bssid) \|\| is_broadcast_ether_addr(bssid))
	491	bssid = NULL;
	492
74f82741 JB	493	if (bssid && !is_valid_ether_addr(bssid))
	494	return -EINVAL;
	495
04a773ad	496	/* both automatic */
cbe8fa9c	497	if (!bssid && !wdev->wext.ibss.bssid)
04a773ad JB	498	return 0;
	499
	500	/* fixed already - and no change */
cbe8fa9c	501	if (wdev->wext.ibss.bssid && bssid &&
ac422d3c	502	ether_addr_equal(bssid, wdev->wext.ibss.bssid))
04a773ad JB	503	return 0;
04a773ad JB	504
667503dd JB	505	wdev_lock(wdev);
	506	err = 0;
	507	if (wdev->ssid_len)
59bbb6f7	508	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	509	wdev_unlock(wdev);
	510
	511	if (err)
	512	return err;
04a773ad JB	513
04a773ad JB	514	if (bssid) {
cbe8fa9c JB	515	memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
cbe8fa9c JB	516	wdev->wext.ibss.bssid = wdev->wext.bssid;
04a773ad	517	} else
cbe8fa9c	518	wdev->wext.ibss.bssid = NULL;
04a773ad	519
fffd0934	520	wdev_lock(wdev);
59bbb6f7	521	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934 JB	522	wdev_unlock(wdev);
	523
	524	return err;
04a773ad	525	}
04a773ad JB	526
	527	int cfg80211_ibss_wext_giwap(struct net_device *dev,
	528	struct iw_request_info *info,
	529	struct sockaddr ap_addr, char extra)
	530	{
	531	struct wireless_dev *wdev = dev->ieee80211_ptr;
	532
	533	/* call only for ibss! */
	534	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	535	return -EINVAL;
	536
	537	ap_addr->sa_family = ARPHRD_ETHER;
	538
667503dd	539	wdev_lock(wdev);
7ebbe6bd	540	if (wdev->current_bss)
19957bb3	541	memcpy(ap_addr->sa_data, wdev->current_bss->pub.bssid, ETH_ALEN);
80e5b06a	542	else if (wdev->wext.ibss.bssid)
cbe8fa9c	543	memcpy(ap_addr->sa_data, wdev->wext.ibss.bssid, ETH_ALEN);
80e5b06a	544	else
d2beae10	545	eth_zero_addr(ap_addr->sa_data);
80e5b06a	546
667503dd JB	547	wdev_unlock(wdev);
667503dd JB	548
04a773ad JB	549	return 0;
04a773ad JB	550	}
04a773ad	551	#endif