[mirror_ubuntu-eoan-kernel.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);

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();
	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;
}

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;

	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 < 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
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
f8d16d3e	95	ASSERT_RTNL();
667503dd JB	96	ASSERT_WDEV_LOCK(wdev);
667503dd JB	97
04a773ad JB	98	if (wdev->ssid_len)
	99	return -EALREADY;
	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	*/
	107	struct ieee80211_supported_band *sband =
683b6d3b	108	rdev->wiphy.bands[params->chandef.chan->band];
93b05238	109	int j;
57fbcce3	110	u32 flag = params->chandef.chan->band == NL80211_BAND_5GHZ ?
93b05238 JB	111	IEEE80211_RATE_MANDATORY_A :
	112	IEEE80211_RATE_MANDATORY_B;
	113
	114	for (j = 0; j < sband->n_bitrates; j++) {
	115	if (sband->bitrates[j].flags & flag)
	116	params->basic_rates \|= BIT(j);
	117	}
	118	}
	119
f1c1f17a JB	120	if (WARN_ON(connkeys && connkeys->def < 0))
	121	return -EINVAL;
	122
fffd0934	123	if (WARN_ON(wdev->connect_keys))
b47f610b	124	kzfree(wdev->connect_keys);
fffd0934 JB	125	wdev->connect_keys = connkeys;
fffd0934 JB	126
c30a3d38	127	wdev->ibss_fixed = params->channel_fixed;
5336fa88	128	wdev->ibss_dfs_possible = params->userspace_handles_dfs;
9e0e2961	129	wdev->chandef = params->chandef;
9ae3b172 TM	130	if (connkeys) {
	131	params->wep_keys = connkeys->params;
	132	params->wep_tx_key = connkeys->def;
	133	}
	134
3d23e349	135	#ifdef CONFIG_CFG80211_WEXT
683b6d3b	136	wdev->wext.ibss.chandef = params->chandef;
04a773ad	137	#endif
e35e4d28	138	err = rdev_join_ibss(rdev, dev, params);
fffd0934 JB	139	if (err) {
fffd0934 JB	140	wdev->connect_keys = NULL;
04a773ad	141	return err;
fffd0934	142	}
04a773ad JB	143
	144	memcpy(wdev->ssid, params->ssid, params->ssid_len);
	145	wdev->ssid_len = params->ssid_len;
	146
	147	return 0;
	148	}
	149
667503dd	150	static void __cfg80211_clear_ibss(struct net_device *dev, bool nowext)
04a773ad JB	151	{
04a773ad JB	152	struct wireless_dev *wdev = dev->ieee80211_ptr;
f26cbf40	153	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
fffd0934	154	int i;
04a773ad	155
667503dd JB	156	ASSERT_WDEV_LOCK(wdev);
667503dd JB	157
b47f610b	158	kzfree(wdev->connect_keys);
fffd0934 JB	159	wdev->connect_keys = NULL;
fffd0934 JB	160
fa9ffc74 KP	161	rdev_set_qos_map(rdev, dev, NULL);
fa9ffc74 KP	162
fffd0934 JB	163	/*
	164	* Delete all the keys ... pairwise keys can't really
	165	* exist any more anyway, but default keys might.
	166	*/
	167	if (rdev->ops->del_key)
	168	for (i = 0; i < 6; i++)
e35e4d28	169	rdev_del_key(rdev, dev, i, false, NULL);
fffd0934	170
04a773ad JB	171	if (wdev->current_bss) {
04a773ad JB	172	cfg80211_unhold_bss(wdev->current_bss);
5b112d3d	173	cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
04a773ad JB	174	}
	175
	176	wdev->current_bss = NULL;
	177	wdev->ssid_len = 0;
9e0e2961	178	memset(&wdev->chandef, 0, sizeof(wdev->chandef));
3d23e349	179	#ifdef CONFIG_CFG80211_WEXT
9d308429	180	if (!nowext)
cbe8fa9c	181	wdev->wext.ibss.ssid_len = 0;
9d308429	182	#endif
b35a51c7	183	cfg80211_sched_dfs_chan_update(rdev);
04a773ad JB	184	}
04a773ad JB	185
667503dd JB	186	void cfg80211_clear_ibss(struct net_device *dev, bool nowext)
	187	{
	188	struct wireless_dev *wdev = dev->ieee80211_ptr;
	189
	190	wdev_lock(wdev);
	191	__cfg80211_clear_ibss(dev, nowext);
	192	wdev_unlock(wdev);
	193	}
	194
98d3a7ca JB	195	int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
98d3a7ca JB	196	struct net_device *dev, bool nowext)
04a773ad	197	{
78485475	198	struct wireless_dev *wdev = dev->ieee80211_ptr;
04a773ad JB	199	int err;
04a773ad JB	200
667503dd JB	201	ASSERT_WDEV_LOCK(wdev);
667503dd JB	202
78485475 JB	203	if (!wdev->ssid_len)
	204	return -ENOLINK;
	205
e35e4d28	206	err = rdev_leave_ibss(rdev, dev);
04a773ad JB	207
	208	if (err)
	209	return err;
	210
f8d16d3e	211	wdev->conn_owner_nlportid = 0;
667503dd	212	__cfg80211_clear_ibss(dev, nowext);
04a773ad JB	213
	214	return 0;
	215	}
	216
667503dd JB	217	int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
	218	struct net_device *dev, bool nowext)
	219	{
	220	struct wireless_dev *wdev = dev->ieee80211_ptr;
	221	int err;
	222
	223	wdev_lock(wdev);
	224	err = __cfg80211_leave_ibss(rdev, dev, nowext);
	225	wdev_unlock(wdev);
	226
	227	return err;
	228	}
	229
3d23e349	230	#ifdef CONFIG_CFG80211_WEXT
fffd0934 JB	231	int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
fffd0934 JB	232	struct wireless_dev *wdev)
04a773ad	233	{
fffd0934	234	struct cfg80211_cached_keys *ck = NULL;
57fbcce3	235	enum nl80211_band band;
fffd0934 JB	236	int i, err;
	237
	238	ASSERT_WDEV_LOCK(wdev);
04a773ad	239
cbe8fa9c JB	240	if (!wdev->wext.ibss.beacon_interval)
cbe8fa9c JB	241	wdev->wext.ibss.beacon_interval = 100;
8e30bc55	242
04a773ad	243	/* try to find an IBSS channel if none requested ... */
683b6d3b	244	if (!wdev->wext.ibss.chandef.chan) {
1fe4517c	245	struct ieee80211_channel *new_chan = NULL;
683b6d3b	246
57fbcce3	247	for (band = 0; band < NUM_NL80211_BANDS; band++) {
04a773ad JB	248	struct ieee80211_supported_band *sband;
	249	struct ieee80211_channel *chan;
	250
	251	sband = rdev->wiphy.bands[band];
	252	if (!sband)
	253	continue;
	254
	255	for (i = 0; i < sband->n_channels; i++) {
	256	chan = &sband->channels[i];
8fe02e16	257	if (chan->flags & IEEE80211_CHAN_NO_IR)
04a773ad JB	258	continue;
	259	if (chan->flags & IEEE80211_CHAN_DISABLED)
	260	continue;
1fe4517c	261	new_chan = chan;
04a773ad JB	262	break;
	263	}
	264
1fe4517c	265	if (new_chan)
04a773ad JB	266	break;
	267	}
	268
1fe4517c	269	if (!new_chan)
04a773ad	270	return -EINVAL;
1fe4517c SW	271
	272	cfg80211_chandef_create(&wdev->wext.ibss.chandef, new_chan,
	273	NL80211_CHAN_NO_HT);
04a773ad JB	274	}
	275
	276	/* don't join -- SSID is not there */
cbe8fa9c	277	if (!wdev->wext.ibss.ssid_len)
04a773ad JB	278	return 0;
	279
	280	if (!netif_running(wdev->netdev))
	281	return 0;
	282
89b706fb	283	if (wdev->wext.keys)
fffd0934 JB	284	wdev->wext.keys->def = wdev->wext.default_key;
	285
	286	wdev->wext.ibss.privacy = wdev->wext.default_key != -1;
	287
f1c1f17a	288	if (wdev->wext.keys && wdev->wext.keys->def != -1) {
fffd0934 JB	289	ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL);
	290	if (!ck)
	291	return -ENOMEM;
b8676221	292	for (i = 0; i < CFG80211_MAX_WEP_KEYS; i++)
fffd0934 JB	293	ck->params[i].key = ck->data[i];
	294	}
	295	err = __cfg80211_join_ibss(rdev, wdev->netdev,
	296	&wdev->wext.ibss, ck);
	297	if (err)
	298	kfree(ck);
	299
	300	return err;
04a773ad JB	301	}
	302
	303	int cfg80211_ibss_wext_siwfreq(struct net_device *dev,
	304	struct iw_request_info *info,
59bbb6f7	305	struct iw_freq wextfreq, char extra)
04a773ad JB	306	{
04a773ad JB	307	struct wireless_dev *wdev = dev->ieee80211_ptr;
f26cbf40	308	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
59bbb6f7 JB	309	struct ieee80211_channel *chan = NULL;
59bbb6f7 JB	310	int err, freq;
04a773ad JB	311
	312	/* call only for ibss! */
	313	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	314	return -EINVAL;
	315
59bbb6f7	316	if (!rdev->ops->join_ibss)
04a773ad JB	317	return -EOPNOTSUPP;
04a773ad JB	318
96998e3a	319	freq = cfg80211_wext_freq(wextfreq);
59bbb6f7 JB	320	if (freq < 0)
59bbb6f7 JB	321	return freq;
04a773ad	322
59bbb6f7 JB	323	if (freq) {
	324	chan = ieee80211_get_channel(wdev->wiphy, freq);
	325	if (!chan)
	326	return -EINVAL;
8fe02e16	327	if (chan->flags & IEEE80211_CHAN_NO_IR \|\|
59bbb6f7 JB	328	chan->flags & IEEE80211_CHAN_DISABLED)
	329	return -EINVAL;
	330	}
04a773ad	331
683b6d3b	332	if (wdev->wext.ibss.chandef.chan == chan)
04a773ad JB	333	return 0;
04a773ad JB	334
667503dd JB	335	wdev_lock(wdev);
	336	err = 0;
	337	if (wdev->ssid_len)
59bbb6f7	338	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	339	wdev_unlock(wdev);
	340
	341	if (err)
	342	return err;
04a773ad JB	343
04a773ad JB	344	if (chan) {
1fe4517c SW	345	cfg80211_chandef_create(&wdev->wext.ibss.chandef, chan,
1fe4517c SW	346	NL80211_CHAN_NO_HT);
cbe8fa9c	347	wdev->wext.ibss.channel_fixed = true;
04a773ad JB	348	} else {
04a773ad JB	349	/* cfg80211_ibss_wext_join will pick one if needed */
cbe8fa9c	350	wdev->wext.ibss.channel_fixed = false;
04a773ad JB	351	}
04a773ad JB	352
fffd0934	353	wdev_lock(wdev);
59bbb6f7	354	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934 JB	355	wdev_unlock(wdev);
	356
	357	return err;
04a773ad	358	}
04a773ad JB	359
	360	int cfg80211_ibss_wext_giwfreq(struct net_device *dev,
	361	struct iw_request_info *info,
	362	struct iw_freq freq, char extra)
	363	{
	364	struct wireless_dev *wdev = dev->ieee80211_ptr;
	365	struct ieee80211_channel *chan = NULL;
	366
	367	/* call only for ibss! */
	368	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	369	return -EINVAL;
	370
667503dd	371	wdev_lock(wdev);
04a773ad	372	if (wdev->current_bss)
19957bb3	373	chan = wdev->current_bss->pub.channel;
683b6d3b JB	374	else if (wdev->wext.ibss.chandef.chan)
683b6d3b JB	375	chan = wdev->wext.ibss.chandef.chan;
667503dd	376	wdev_unlock(wdev);
04a773ad JB	377
	378	if (chan) {
	379	freq->m = chan->center_freq;
	380	freq->e = 6;
	381	return 0;
	382	}
	383
	384	/* no channel if not joining */
	385	return -EINVAL;
	386	}
04a773ad JB	387
	388	int cfg80211_ibss_wext_siwessid(struct net_device *dev,
	389	struct iw_request_info *info,
	390	struct iw_point data, char ssid)
	391	{
	392	struct wireless_dev *wdev = dev->ieee80211_ptr;
f26cbf40	393	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
04a773ad JB	394	size_t len = data->length;
	395	int err;
	396
	397	/* call only for ibss! */
	398	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	399	return -EINVAL;
	400
59bbb6f7	401	if (!rdev->ops->join_ibss)
04a773ad JB	402	return -EOPNOTSUPP;
04a773ad JB	403
667503dd JB	404	wdev_lock(wdev);
	405	err = 0;
	406	if (wdev->ssid_len)
59bbb6f7	407	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	408	wdev_unlock(wdev);
	409
	410	if (err)
	411	return err;
04a773ad JB	412
	413	/* iwconfig uses nul termination in SSID.. */
	414	if (len > 0 && ssid[len - 1] == '\0')
	415	len--;
	416
c1e5f471	417	memcpy(wdev->ssid, ssid, len);
cbe8fa9c	418	wdev->wext.ibss.ssid = wdev->ssid;
cbe8fa9c	419	wdev->wext.ibss.ssid_len = len;
04a773ad	420
fffd0934	421	wdev_lock(wdev);
59bbb6f7	422	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934 JB	423	wdev_unlock(wdev);
	424
	425	return err;
04a773ad	426	}
04a773ad JB	427
	428	int cfg80211_ibss_wext_giwessid(struct net_device *dev,
	429	struct iw_request_info *info,
	430	struct iw_point data, char ssid)
	431	{
	432	struct wireless_dev *wdev = dev->ieee80211_ptr;
	433
	434	/* call only for ibss! */
	435	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	436	return -EINVAL;
	437
	438	data->flags = 0;
	439
667503dd	440	wdev_lock(wdev);
04a773ad JB	441	if (wdev->ssid_len) {
	442	data->flags = 1;
	443	data->length = wdev->ssid_len;
	444	memcpy(ssid, wdev->ssid, data->length);
cbe8fa9c	445	} else if (wdev->wext.ibss.ssid && wdev->wext.ibss.ssid_len) {
04a773ad	446	data->flags = 1;
cbe8fa9c JB	447	data->length = wdev->wext.ibss.ssid_len;
cbe8fa9c JB	448	memcpy(ssid, wdev->wext.ibss.ssid, data->length);
04a773ad	449	}
667503dd	450	wdev_unlock(wdev);
04a773ad JB	451
	452	return 0;
	453	}
04a773ad JB	454
	455	int cfg80211_ibss_wext_siwap(struct net_device *dev,
	456	struct iw_request_info *info,
	457	struct sockaddr ap_addr, char extra)
	458	{
	459	struct wireless_dev *wdev = dev->ieee80211_ptr;
f26cbf40	460	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
04a773ad JB	461	u8 *bssid = ap_addr->sa_data;
	462	int err;
	463
	464	/* call only for ibss! */
	465	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	466	return -EINVAL;
	467
59bbb6f7	468	if (!rdev->ops->join_ibss)
04a773ad JB	469	return -EOPNOTSUPP;
	470
	471	if (ap_addr->sa_family != ARPHRD_ETHER)
	472	return -EINVAL;
	473
	474	/* automatic mode */
	475	if (is_zero_ether_addr(bssid) \|\| is_broadcast_ether_addr(bssid))
	476	bssid = NULL;
	477
74f82741 JB	478	if (bssid && !is_valid_ether_addr(bssid))
	479	return -EINVAL;
	480
04a773ad	481	/* both automatic */
cbe8fa9c	482	if (!bssid && !wdev->wext.ibss.bssid)
04a773ad JB	483	return 0;
	484
	485	/* fixed already - and no change */
cbe8fa9c	486	if (wdev->wext.ibss.bssid && bssid &&
ac422d3c	487	ether_addr_equal(bssid, wdev->wext.ibss.bssid))
04a773ad JB	488	return 0;
04a773ad JB	489
667503dd JB	490	wdev_lock(wdev);
	491	err = 0;
	492	if (wdev->ssid_len)
59bbb6f7	493	err = __cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	494	wdev_unlock(wdev);
	495
	496	if (err)
	497	return err;
04a773ad JB	498
04a773ad JB	499	if (bssid) {
cbe8fa9c JB	500	memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
cbe8fa9c JB	501	wdev->wext.ibss.bssid = wdev->wext.bssid;
04a773ad	502	} else
cbe8fa9c	503	wdev->wext.ibss.bssid = NULL;
04a773ad	504
fffd0934	505	wdev_lock(wdev);
59bbb6f7	506	err = cfg80211_ibss_wext_join(rdev, wdev);
fffd0934 JB	507	wdev_unlock(wdev);
	508
	509	return err;
04a773ad	510	}
04a773ad JB	511
	512	int cfg80211_ibss_wext_giwap(struct net_device *dev,
	513	struct iw_request_info *info,
	514	struct sockaddr ap_addr, char extra)
	515	{
	516	struct wireless_dev *wdev = dev->ieee80211_ptr;
	517
	518	/* call only for ibss! */
	519	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	520	return -EINVAL;
	521
	522	ap_addr->sa_family = ARPHRD_ETHER;
	523
667503dd	524	wdev_lock(wdev);
7ebbe6bd	525	if (wdev->current_bss)
19957bb3	526	memcpy(ap_addr->sa_data, wdev->current_bss->pub.bssid, ETH_ALEN);
80e5b06a	527	else if (wdev->wext.ibss.bssid)
cbe8fa9c	528	memcpy(ap_addr->sa_data, wdev->wext.ibss.bssid, ETH_ALEN);
80e5b06a	529	else
d2beae10	530	eth_zero_addr(ap_addr->sa_data);
80e5b06a	531
667503dd JB	532	wdev_unlock(wdev);
667503dd JB	533
04a773ad JB	534	return 0;
04a773ad JB	535	}
04a773ad	536	#endif