[linux-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>
 * Copyright (C) 2020-2022 Intel Corporation
 */

#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->u.ibss.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->u.ibss.current_bss) {
		cfg80211_unhold_bss(wdev->u.ibss.current_bss);
		cfg80211_put_bss(wdev->wiphy, &wdev->u.ibss.current_bss->pub);
	}

	cfg80211_hold_bss(bss_from_pub(bss));
	wdev->u.ibss.current_bss = bss_from_pub(bss);

	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);

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;

	lockdep_assert_held(&rdev->wiphy.mtx);
	ASSERT_WDEV_LOCK(wdev);

	if (wdev->u.ibss.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;
		enum nl80211_band band;
		u32 flag;
		int j;

		band = params->chandef.chan->band;
		if (band == NL80211_BAND_5GHZ ||
		    band == NL80211_BAND_6GHZ)
			flag = IEEE80211_RATE_MANDATORY_A;
		else
			flag = IEEE80211_RATE_MANDATORY_B;

		sband = rdev->wiphy.bands[band];
		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))
		kfree_sensitive(wdev->connect_keys);
	wdev->connect_keys = connkeys;

	wdev->u.ibss.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->u.ibss.ssid, params->ssid, params->ssid_len);
	wdev->u.ibss.ssid_len = params->ssid_len;

	return 0;
}

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);

	kfree_sensitive(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, -1, i, false, NULL);

	if (wdev->u.ibss.current_bss) {
		cfg80211_unhold_bss(wdev->u.ibss.current_bss);
		cfg80211_put_bss(wdev->wiphy, &wdev->u.ibss.current_bss->pub);
	}

	wdev->u.ibss.current_bss = NULL;
	wdev->u.ibss.ssid_len = 0;
	memset(&wdev->u.ibss.chandef, 0, sizeof(wdev->u.ibss.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->u.ibss.ssid_len)
		return -ENOLINK;

	err = rdev_leave_ibss(rdev, dev);

	if (err)
		return err;

	wdev->conn_owner_nlportid = 0;
	__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 < 4; 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->u.ibss.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->u.ibss.current_bss)
		chan = wdev->u.ibss.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->u.ibss.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->u.ibss.ssid, ssid, len);
	wdev->wext.ibss.ssid = wdev->u.ibss.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->u.ibss.ssid_len) {
		data->flags = 1;
		data->length = wdev->u.ibss.ssid_len;
		memcpy(ssid, wdev->u.ibss.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->u.ibss.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->u.ibss.current_bss)
		memcpy(ap_addr->sa_data, wdev->u.ibss.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>
34c9a0e7	6	* Copyright (C) 2020-2022 Intel Corporation
04a773ad JB	7	*/
	8
	9	#include <linux/etherdevice.h>
	10	#include <linux/if_arp.h>
5a0e3ad6	11	#include <linux/slab.h>
bc3b2d7f	12	#include <linux/export.h>
04a773ad	13	#include <net/cfg80211.h>
0e82ffe3	14	#include "wext-compat.h"
04a773ad	15	#include "nl80211.h"
e35e4d28	16	#include "rdev-ops.h"
04a773ad JB	17
04a773ad JB	18
fe94f3a4 AQ	19	void __cfg80211_ibss_joined(struct net_device dev, const u8 bssid,
fe94f3a4 AQ	20	struct ieee80211_channel *channel)
04a773ad JB	21	{
	22	struct wireless_dev *wdev = dev->ieee80211_ptr;
	23	struct cfg80211_bss *bss;
3d23e349	24	#ifdef CONFIG_CFG80211_WEXT
04a773ad JB	25	union iwreq_data wrqu;
	26	#endif
	27
	28	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	29	return;
	30
7b0a0e3c	31	if (!wdev->u.ibss.ssid_len)
04a773ad JB	32	return;
04a773ad JB	33
fe94f3a4	34	bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, NULL, 0,
6eb18137	35	IEEE80211_BSS_TYPE_IBSS, IEEE80211_PRIVACY_ANY);
04a773ad JB	36
	37	if (WARN_ON(!bss))
	38	return;
	39
7b0a0e3c JB	40	if (wdev->u.ibss.current_bss) {
	41	cfg80211_unhold_bss(wdev->u.ibss.current_bss);
	42	cfg80211_put_bss(wdev->wiphy, &wdev->u.ibss.current_bss->pub);
04a773ad JB	43	}
04a773ad JB	44
19957bb3	45	cfg80211_hold_bss(bss_from_pub(bss));
7b0a0e3c	46	wdev->u.ibss.current_bss = bss_from_pub(bss);
04a773ad	47
585b6e13	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
f8d16d3e DK	87	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
a05829a7	95	lockdep_assert_held(&rdev->wiphy.mtx);
667503dd JB	96	ASSERT_WDEV_LOCK(wdev);
667503dd JB	97
7b0a0e3c	98	if (wdev->u.ibss.ssid_len)
04a773ad JB	99	return -EALREADY;
04a773ad JB	100
93b05238 JB	101	if (!params->basic_rates) {
	102	/*
	103	* If no rates were explicitly configured,
	104	* use the mandatory rate set for 11b or
	105	* 11a for maximum compatibility.
	106	*/
5ea4e780 AS	107	struct ieee80211_supported_band *sband;
	108	enum nl80211_band band;
	109	u32 flag;
93b05238	110	int j;
93b05238	111
5ea4e780 AS	112	band = params->chandef.chan->band;
	113	if (band == NL80211_BAND_5GHZ \|\|
	114	band == NL80211_BAND_6GHZ)
	115	flag = IEEE80211_RATE_MANDATORY_A;
	116	else
	117	flag = IEEE80211_RATE_MANDATORY_B;
	118
	119	sband = rdev->wiphy.bands[band];
93b05238 JB	120	for (j = 0; j < sband->n_bitrates; j++) {
	121	if (sband->bitrates[j].flags & flag)
	122	params->basic_rates \|= BIT(j);
	123	}
	124	}
	125
f1c1f17a JB	126	if (WARN_ON(connkeys && connkeys->def < 0))
	127	return -EINVAL;
	128
fffd0934	129	if (WARN_ON(wdev->connect_keys))
453431a5	130	kfree_sensitive(wdev->connect_keys);
fffd0934 JB	131	wdev->connect_keys = connkeys;
fffd0934 JB	132
7b0a0e3c	133	wdev->u.ibss.chandef = params->chandef;
9ae3b172 TM	134	if (connkeys) {
	135	params->wep_keys = connkeys->params;
	136	params->wep_tx_key = connkeys->def;
	137	}
	138
3d23e349	139	#ifdef CONFIG_CFG80211_WEXT
683b6d3b	140	wdev->wext.ibss.chandef = params->chandef;
04a773ad	141	#endif
e35e4d28	142	err = rdev_join_ibss(rdev, dev, params);
fffd0934 JB	143	if (err) {
fffd0934 JB	144	wdev->connect_keys = NULL;
04a773ad	145	return err;
fffd0934	146	}
04a773ad	147
7b0a0e3c JB	148	memcpy(wdev->u.ibss.ssid, params->ssid, params->ssid_len);
7b0a0e3c JB	149	wdev->u.ibss.ssid_len = params->ssid_len;
04a773ad JB	150
	151	return 0;
	152	}
	153
667503dd	154	static void __cfg80211_clear_ibss(struct net_device *dev, bool nowext)
04a773ad JB	155	{
04a773ad JB	156	struct wireless_dev *wdev = dev->ieee80211_ptr;
f26cbf40	157	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
fffd0934	158	int i;
04a773ad	159
667503dd JB	160	ASSERT_WDEV_LOCK(wdev);
667503dd JB	161
453431a5	162	kfree_sensitive(wdev->connect_keys);
fffd0934 JB	163	wdev->connect_keys = NULL;
fffd0934 JB	164
fa9ffc74 KP	165	rdev_set_qos_map(rdev, dev, NULL);
fa9ffc74 KP	166
fffd0934 JB	167	/*
	168	* Delete all the keys ... pairwise keys can't really
	169	* exist any more anyway, but default keys might.
	170	*/
	171	if (rdev->ops->del_key)
	172	for (i = 0; i < 6; i++)
e7a7b84e	173	rdev_del_key(rdev, dev, -1, i, false, NULL);
fffd0934	174
7b0a0e3c JB	175	if (wdev->u.ibss.current_bss) {
	176	cfg80211_unhold_bss(wdev->u.ibss.current_bss);
	177	cfg80211_put_bss(wdev->wiphy, &wdev->u.ibss.current_bss->pub);
04a773ad JB	178	}
04a773ad JB	179
7b0a0e3c JB	180	wdev->u.ibss.current_bss = NULL;
	181	wdev->u.ibss.ssid_len = 0;
	182	memset(&wdev->u.ibss.chandef, 0, sizeof(wdev->u.ibss.chandef));
3d23e349	183	#ifdef CONFIG_CFG80211_WEXT
9d308429	184	if (!nowext)
cbe8fa9c	185	wdev->wext.ibss.ssid_len = 0;
9d308429	186	#endif
b35a51c7	187	cfg80211_sched_dfs_chan_update(rdev);
04a773ad JB	188	}
04a773ad JB	189
667503dd JB	190	void cfg80211_clear_ibss(struct net_device *dev, bool nowext)
	191	{
	192	struct wireless_dev *wdev = dev->ieee80211_ptr;
	193
	194	wdev_lock(wdev);
	195	__cfg80211_clear_ibss(dev, nowext);
	196	wdev_unlock(wdev);
	197	}
	198
98d3a7ca JB	199	int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
98d3a7ca JB	200	struct net_device *dev, bool nowext)
04a773ad	201	{
78485475	202	struct wireless_dev *wdev = dev->ieee80211_ptr;
04a773ad JB	203	int err;
04a773ad JB	204
667503dd JB	205	ASSERT_WDEV_LOCK(wdev);
667503dd JB	206
7b0a0e3c	207	if (!wdev->u.ibss.ssid_len)
78485475 JB	208	return -ENOLINK;
78485475 JB	209
e35e4d28	210	err = rdev_leave_ibss(rdev, dev);
04a773ad JB	211
	212	if (err)
	213	return err;
	214
f8d16d3e	215	wdev->conn_owner_nlportid = 0;
667503dd	216	__cfg80211_clear_ibss(dev, nowext);
04a773ad JB	217
	218	return 0;
	219	}
	220
667503dd JB	221	int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
	222	struct net_device *dev, bool nowext)
	223	{
	224	struct wireless_dev *wdev = dev->ieee80211_ptr;
	225	int err;
	226
	227	wdev_lock(wdev);
	228	err = __cfg80211_leave_ibss(rdev, dev, nowext);
	229	wdev_unlock(wdev);
	230
	231	return err;
	232	}
	233
3d23e349	234	#ifdef CONFIG_CFG80211_WEXT
fffd0934 JB	235	int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
fffd0934 JB	236	struct wireless_dev *wdev)
04a773ad	237	{
fffd0934	238	struct cfg80211_cached_keys *ck = NULL;
57fbcce3	239	enum nl80211_band band;
fffd0934 JB	240	int i, err;
	241
	242	ASSERT_WDEV_LOCK(wdev);
04a773ad	243
cbe8fa9c JB	244	if (!wdev->wext.ibss.beacon_interval)
cbe8fa9c JB	245	wdev->wext.ibss.beacon_interval = 100;
8e30bc55	246
04a773ad	247	/* try to find an IBSS channel if none requested ... */
683b6d3b	248	if (!wdev->wext.ibss.chandef.chan) {
1fe4517c	249	struct ieee80211_channel *new_chan = NULL;
683b6d3b	250
57fbcce3	251	for (band = 0; band < NUM_NL80211_BANDS; band++) {
04a773ad JB	252	struct ieee80211_supported_band *sband;
	253	struct ieee80211_channel *chan;
	254
	255	sband = rdev->wiphy.bands[band];
	256	if (!sband)
	257	continue;
	258
	259	for (i = 0; i < sband->n_channels; i++) {
	260	chan = &sband->channels[i];
8fe02e16	261	if (chan->flags & IEEE80211_CHAN_NO_IR)
04a773ad JB	262	continue;
	263	if (chan->flags & IEEE80211_CHAN_DISABLED)
	264	continue;
1fe4517c	265	new_chan = chan;
04a773ad JB	266	break;
	267	}
	268
1fe4517c	269	if (new_chan)
04a773ad JB	270	break;
	271	}
	272
1fe4517c	273	if (!new_chan)
04a773ad	274	return -EINVAL;
1fe4517c SW	275
	276	cfg80211_chandef_create(&wdev->wext.ibss.chandef, new_chan,
	277	NL80211_CHAN_NO_HT);
04a773ad JB	278	}
	279
	280	/* don't join -- SSID is not there */
cbe8fa9c	281	if (!wdev->wext.ibss.ssid_len)
04a773ad JB	282	return 0;
	283
	284	if (!netif_running(wdev->netdev))
	285	return 0;
	286
89b706fb	287	if (wdev->wext.keys)
fffd0934 JB	288	wdev->wext.keys->def = wdev->wext.default_key;
	289
	290	wdev->wext.ibss.privacy = wdev->wext.default_key != -1;
	291
f1c1f17a	292	if (wdev->wext.keys && wdev->wext.keys->def != -1) {
fffd0934 JB	293	ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL);
	294	if (!ck)
	295	return -ENOMEM;
585b6e13	296	for (i = 0; i < 4; i++)
fffd0934 JB	297	ck->params[i].key = ck->data[i];
	298	}
	299	err = __cfg80211_join_ibss(rdev, wdev->netdev,
	300	&wdev->wext.ibss, ck);
	301	if (err)
	302	kfree(ck);
	303
	304	return err;
04a773ad JB	305	}
	306
	307	int cfg80211_ibss_wext_siwfreq(struct net_device *dev,
	308	struct iw_request_info *info,
59bbb6f7	309	struct iw_freq wextfreq, char extra)
04a773ad JB	310	{
04a773ad JB	311	struct wireless_dev *wdev = dev->ieee80211_ptr;
f26cbf40	312	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
59bbb6f7 JB	313	struct ieee80211_channel *chan = NULL;
59bbb6f7 JB	314	int err, freq;
04a773ad JB	315
	316	/* call only for ibss! */
	317	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	318	return -EINVAL;
	319
59bbb6f7	320	if (!rdev->ops->join_ibss)
04a773ad JB	321	return -EOPNOTSUPP;
04a773ad JB	322
96998e3a	323	freq = cfg80211_wext_freq(wextfreq);
59bbb6f7 JB	324	if (freq < 0)
59bbb6f7 JB	325	return freq;
04a773ad	326
59bbb6f7 JB	327	if (freq) {
	328	chan = ieee80211_get_channel(wdev->wiphy, freq);
	329	if (!chan)
	330	return -EINVAL;
8fe02e16	331	if (chan->flags & IEEE80211_CHAN_NO_IR \|\|
59bbb6f7 JB	332	chan->flags & IEEE80211_CHAN_DISABLED)
	333	return -EINVAL;
	334	}
04a773ad	335
683b6d3b	336	if (wdev->wext.ibss.chandef.chan == chan)
04a773ad JB	337	return 0;
04a773ad JB	338
667503dd JB	339	wdev_lock(wdev);
667503dd JB	340	err = 0;
7b0a0e3c	341	if (wdev->u.ibss.ssid_len)
59bbb6f7	342	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	343	wdev_unlock(wdev);
	344
	345	if (err)
	346	return err;
04a773ad JB	347
04a773ad JB	348	if (chan) {
1fe4517c SW	349	cfg80211_chandef_create(&wdev->wext.ibss.chandef, chan,
1fe4517c SW	350	NL80211_CHAN_NO_HT);
cbe8fa9c	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
fffd0934	357	wdev_lock(wdev);
59bbb6f7	358	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934 JB	359	wdev_unlock(wdev);
	360
	361	return err;
04a773ad	362	}
04a773ad JB	363
	364	int cfg80211_ibss_wext_giwfreq(struct net_device *dev,
	365	struct iw_request_info *info,
	366	struct iw_freq freq, char extra)
	367	{
	368	struct wireless_dev *wdev = dev->ieee80211_ptr;
	369	struct ieee80211_channel *chan = NULL;
	370
	371	/* call only for ibss! */
	372	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	373	return -EINVAL;
	374
667503dd	375	wdev_lock(wdev);
7b0a0e3c JB	376	if (wdev->u.ibss.current_bss)
7b0a0e3c JB	377	chan = wdev->u.ibss.current_bss->pub.channel;
683b6d3b JB	378	else if (wdev->wext.ibss.chandef.chan)
683b6d3b JB	379	chan = wdev->wext.ibss.chandef.chan;
667503dd	380	wdev_unlock(wdev);
04a773ad JB	381
	382	if (chan) {
	383	freq->m = chan->center_freq;
	384	freq->e = 6;
	385	return 0;
	386	}
	387
	388	/* no channel if not joining */
	389	return -EINVAL;
	390	}
04a773ad JB	391
	392	int cfg80211_ibss_wext_siwessid(struct net_device *dev,
	393	struct iw_request_info *info,
	394	struct iw_point data, char ssid)
	395	{
	396	struct wireless_dev *wdev = dev->ieee80211_ptr;
f26cbf40	397	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
04a773ad JB	398	size_t len = data->length;
	399	int err;
	400
	401	/* call only for ibss! */
	402	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	403	return -EINVAL;
	404
59bbb6f7	405	if (!rdev->ops->join_ibss)
04a773ad JB	406	return -EOPNOTSUPP;
04a773ad JB	407
667503dd JB	408	wdev_lock(wdev);
667503dd JB	409	err = 0;
7b0a0e3c	410	if (wdev->u.ibss.ssid_len)
59bbb6f7	411	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	412	wdev_unlock(wdev);
	413
	414	if (err)
	415	return err;
04a773ad JB	416
	417	/* iwconfig uses nul termination in SSID.. */
	418	if (len > 0 && ssid[len - 1] == '\0')
	419	len--;
	420
7b0a0e3c JB	421	memcpy(wdev->u.ibss.ssid, ssid, len);
7b0a0e3c JB	422	wdev->wext.ibss.ssid = wdev->u.ibss.ssid;
cbe8fa9c	423	wdev->wext.ibss.ssid_len = len;
04a773ad	424
fffd0934	425	wdev_lock(wdev);
59bbb6f7	426	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934 JB	427	wdev_unlock(wdev);
	428
	429	return err;
04a773ad	430	}
04a773ad JB	431
	432	int cfg80211_ibss_wext_giwessid(struct net_device *dev,
	433	struct iw_request_info *info,
	434	struct iw_point data, char ssid)
	435	{
	436	struct wireless_dev *wdev = dev->ieee80211_ptr;
	437
	438	/* call only for ibss! */
	439	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	440	return -EINVAL;
	441
	442	data->flags = 0;
	443
667503dd	444	wdev_lock(wdev);
7b0a0e3c	445	if (wdev->u.ibss.ssid_len) {
04a773ad	446	data->flags = 1;
7b0a0e3c JB	447	data->length = wdev->u.ibss.ssid_len;
7b0a0e3c JB	448	memcpy(ssid, wdev->u.ibss.ssid, data->length);
cbe8fa9c	449	} else if (wdev->wext.ibss.ssid && wdev->wext.ibss.ssid_len) {
04a773ad	450	data->flags = 1;
cbe8fa9c JB	451	data->length = wdev->wext.ibss.ssid_len;
cbe8fa9c JB	452	memcpy(ssid, wdev->wext.ibss.ssid, data->length);
04a773ad	453	}
667503dd	454	wdev_unlock(wdev);
04a773ad JB	455
	456	return 0;
	457	}
04a773ad JB	458
	459	int cfg80211_ibss_wext_siwap(struct net_device *dev,
	460	struct iw_request_info *info,
	461	struct sockaddr ap_addr, char extra)
	462	{
	463	struct wireless_dev *wdev = dev->ieee80211_ptr;
f26cbf40	464	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
04a773ad JB	465	u8 *bssid = ap_addr->sa_data;
	466	int err;
	467
	468	/* call only for ibss! */
	469	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	470	return -EINVAL;
	471
59bbb6f7	472	if (!rdev->ops->join_ibss)
04a773ad JB	473	return -EOPNOTSUPP;
	474
	475	if (ap_addr->sa_family != ARPHRD_ETHER)
	476	return -EINVAL;
	477
	478	/* automatic mode */
	479	if (is_zero_ether_addr(bssid) \|\| is_broadcast_ether_addr(bssid))
	480	bssid = NULL;
	481
74f82741 JB	482	if (bssid && !is_valid_ether_addr(bssid))
	483	return -EINVAL;
	484
04a773ad	485	/* both automatic */
cbe8fa9c	486	if (!bssid && !wdev->wext.ibss.bssid)
04a773ad JB	487	return 0;
	488
	489	/* fixed already - and no change */
cbe8fa9c	490	if (wdev->wext.ibss.bssid && bssid &&
ac422d3c	491	ether_addr_equal(bssid, wdev->wext.ibss.bssid))
04a773ad JB	492	return 0;
04a773ad JB	493
667503dd JB	494	wdev_lock(wdev);
667503dd JB	495	err = 0;
7b0a0e3c	496	if (wdev->u.ibss.ssid_len)
59bbb6f7	497	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	498	wdev_unlock(wdev);
	499
	500	if (err)
	501	return err;
04a773ad JB	502
04a773ad JB	503	if (bssid) {
cbe8fa9c JB	504	memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
cbe8fa9c JB	505	wdev->wext.ibss.bssid = wdev->wext.bssid;
04a773ad	506	} else
cbe8fa9c	507	wdev->wext.ibss.bssid = NULL;
04a773ad	508
fffd0934	509	wdev_lock(wdev);
59bbb6f7	510	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934 JB	511	wdev_unlock(wdev);
	512
	513	return err;
04a773ad	514	}
04a773ad JB	515
	516	int cfg80211_ibss_wext_giwap(struct net_device *dev,
	517	struct iw_request_info *info,
	518	struct sockaddr ap_addr, char extra)
	519	{
	520	struct wireless_dev *wdev = dev->ieee80211_ptr;
	521
	522	/* call only for ibss! */
	523	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	524	return -EINVAL;
	525
	526	ap_addr->sa_family = ARPHRD_ETHER;
	527
667503dd	528	wdev_lock(wdev);
7b0a0e3c JB	529	if (wdev->u.ibss.current_bss)
	530	memcpy(ap_addr->sa_data, wdev->u.ibss.current_bss->pub.bssid,
	531	ETH_ALEN);
80e5b06a	532	else if (wdev->wext.ibss.bssid)
cbe8fa9c	533	memcpy(ap_addr->sa_data, wdev->wext.ibss.bssid, ETH_ALEN);
80e5b06a	534	else
d2beae10	535	eth_zero_addr(ap_addr->sa_data);
80e5b06a	536
667503dd JB	537	wdev_unlock(wdev);
667503dd JB	538
04a773ad JB	539	return 0;
04a773ad JB	540	}
04a773ad	541	#endif