[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>
 * Copyright (C) 2020-2023 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);

	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;
}

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;

	lockdep_assert_wiphy(wdev->wiphy);

	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);
}

int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
			struct net_device *dev, bool nowext)
{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	int err;

	lockdep_assert_wiphy(wdev->wiphy);

	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;
}

#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;

	lockdep_assert_wiphy(wdev->wiphy);

	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;

	err = 0;
	if (wdev->u.ibss.ssid_len)
		err = cfg80211_leave_ibss(rdev, dev, true);

	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;
	}

	return cfg80211_ibss_wext_join(rdev, wdev);
}

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;

	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;

	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;

	err = 0;
	if (wdev->u.ibss.ssid_len)
		err = cfg80211_leave_ibss(rdev, dev, true);

	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;

	return cfg80211_ibss_wext_join(rdev, wdev);
}

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;

	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);
	}

	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;

	err = 0;
	if (wdev->u.ibss.ssid_len)
		err = cfg80211_leave_ibss(rdev, dev, true);

	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;

	return cfg80211_ibss_wext_join(rdev, wdev);
}

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;

	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);

	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>
076fc877	6	* Copyright (C) 2020-2023 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	96
7b0a0e3c	97	if (wdev->u.ibss.ssid_len)
04a773ad JB	98	return -EALREADY;
04a773ad JB	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	*/
5ea4e780 AS	106	struct ieee80211_supported_band *sband;
	107	enum nl80211_band band;
	108	u32 flag;
93b05238	109	int j;
93b05238	110
5ea4e780 AS	111	band = params->chandef.chan->band;
	112	if (band == NL80211_BAND_5GHZ \|\|
	113	band == NL80211_BAND_6GHZ)
	114	flag = IEEE80211_RATE_MANDATORY_A;
	115	else
	116	flag = IEEE80211_RATE_MANDATORY_B;
	117
	118	sband = rdev->wiphy.bands[band];
93b05238 JB	119	for (j = 0; j < sband->n_bitrates; j++) {
	120	if (sband->bitrates[j].flags & flag)
	121	params->basic_rates \|= BIT(j);
	122	}
	123	}
	124
f1c1f17a JB	125	if (WARN_ON(connkeys && connkeys->def < 0))
	126	return -EINVAL;
	127
fffd0934	128	if (WARN_ON(wdev->connect_keys))
453431a5	129	kfree_sensitive(wdev->connect_keys);
fffd0934 JB	130	wdev->connect_keys = connkeys;
fffd0934 JB	131
7b0a0e3c	132	wdev->u.ibss.chandef = params->chandef;
9ae3b172 TM	133	if (connkeys) {
	134	params->wep_keys = connkeys->params;
	135	params->wep_tx_key = connkeys->def;
	136	}
	137
3d23e349	138	#ifdef CONFIG_CFG80211_WEXT
683b6d3b	139	wdev->wext.ibss.chandef = params->chandef;
04a773ad	140	#endif
e35e4d28	141	err = rdev_join_ibss(rdev, dev, params);
fffd0934 JB	142	if (err) {
fffd0934 JB	143	wdev->connect_keys = NULL;
04a773ad	144	return err;
fffd0934	145	}
04a773ad	146
7b0a0e3c JB	147	memcpy(wdev->u.ibss.ssid, params->ssid, params->ssid_len);
7b0a0e3c JB	148	wdev->u.ibss.ssid_len = params->ssid_len;
04a773ad JB	149
	150	return 0;
	151	}
	152
076fc877	153	void cfg80211_clear_ibss(struct net_device *dev, bool nowext)
04a773ad JB	154	{
04a773ad JB	155	struct wireless_dev *wdev = dev->ieee80211_ptr;
f26cbf40	156	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
fffd0934	157	int i;
04a773ad	158
076fc877	159	lockdep_assert_wiphy(wdev->wiphy);
667503dd	160
453431a5	161	kfree_sensitive(wdev->connect_keys);
fffd0934 JB	162	wdev->connect_keys = NULL;
fffd0934 JB	163
fa9ffc74 KP	164	rdev_set_qos_map(rdev, dev, NULL);
fa9ffc74 KP	165
fffd0934 JB	166	/*
	167	* Delete all the keys ... pairwise keys can't really
	168	* exist any more anyway, but default keys might.
	169	*/
	170	if (rdev->ops->del_key)
	171	for (i = 0; i < 6; i++)
e7a7b84e	172	rdev_del_key(rdev, dev, -1, i, false, NULL);
fffd0934	173
7b0a0e3c JB	174	if (wdev->u.ibss.current_bss) {
	175	cfg80211_unhold_bss(wdev->u.ibss.current_bss);
	176	cfg80211_put_bss(wdev->wiphy, &wdev->u.ibss.current_bss->pub);
04a773ad JB	177	}
04a773ad JB	178
7b0a0e3c JB	179	wdev->u.ibss.current_bss = NULL;
	180	wdev->u.ibss.ssid_len = 0;
	181	memset(&wdev->u.ibss.chandef, 0, sizeof(wdev->u.ibss.chandef));
3d23e349	182	#ifdef CONFIG_CFG80211_WEXT
9d308429	183	if (!nowext)
cbe8fa9c	184	wdev->wext.ibss.ssid_len = 0;
9d308429	185	#endif
b35a51c7	186	cfg80211_sched_dfs_chan_update(rdev);
04a773ad JB	187	}
04a773ad JB	188
076fc877 JB	189	int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
076fc877 JB	190	struct net_device *dev, bool nowext)
04a773ad	191	{
78485475	192	struct wireless_dev *wdev = dev->ieee80211_ptr;
04a773ad JB	193	int err;
04a773ad JB	194
076fc877	195	lockdep_assert_wiphy(wdev->wiphy);
667503dd	196
7b0a0e3c	197	if (!wdev->u.ibss.ssid_len)
78485475 JB	198	return -ENOLINK;
78485475 JB	199
e35e4d28	200	err = rdev_leave_ibss(rdev, dev);
04a773ad JB	201
	202	if (err)
	203	return err;
	204
f8d16d3e	205	wdev->conn_owner_nlportid = 0;
076fc877	206	cfg80211_clear_ibss(dev, nowext);
04a773ad JB	207
	208	return 0;
	209	}
	210
3d23e349	211	#ifdef CONFIG_CFG80211_WEXT
fffd0934 JB	212	int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
fffd0934 JB	213	struct wireless_dev *wdev)
04a773ad	214	{
fffd0934	215	struct cfg80211_cached_keys *ck = NULL;
57fbcce3	216	enum nl80211_band band;
fffd0934 JB	217	int i, err;
fffd0934 JB	218
076fc877	219	lockdep_assert_wiphy(wdev->wiphy);
04a773ad	220
cbe8fa9c JB	221	if (!wdev->wext.ibss.beacon_interval)
cbe8fa9c JB	222	wdev->wext.ibss.beacon_interval = 100;
8e30bc55	223
04a773ad	224	/* try to find an IBSS channel if none requested ... */
683b6d3b	225	if (!wdev->wext.ibss.chandef.chan) {
1fe4517c	226	struct ieee80211_channel *new_chan = NULL;
683b6d3b	227
57fbcce3	228	for (band = 0; band < NUM_NL80211_BANDS; band++) {
04a773ad JB	229	struct ieee80211_supported_band *sband;
	230	struct ieee80211_channel *chan;
	231
	232	sband = rdev->wiphy.bands[band];
	233	if (!sband)
	234	continue;
	235
	236	for (i = 0; i < sband->n_channels; i++) {
	237	chan = &sband->channels[i];
8fe02e16	238	if (chan->flags & IEEE80211_CHAN_NO_IR)
04a773ad JB	239	continue;
	240	if (chan->flags & IEEE80211_CHAN_DISABLED)
	241	continue;
1fe4517c	242	new_chan = chan;
04a773ad JB	243	break;
	244	}
	245
1fe4517c	246	if (new_chan)
04a773ad JB	247	break;
	248	}
	249
1fe4517c	250	if (!new_chan)
04a773ad	251	return -EINVAL;
1fe4517c SW	252
	253	cfg80211_chandef_create(&wdev->wext.ibss.chandef, new_chan,
	254	NL80211_CHAN_NO_HT);
04a773ad JB	255	}
	256
	257	/* don't join -- SSID is not there */
cbe8fa9c	258	if (!wdev->wext.ibss.ssid_len)
04a773ad JB	259	return 0;
	260
	261	if (!netif_running(wdev->netdev))
	262	return 0;
	263
89b706fb	264	if (wdev->wext.keys)
fffd0934 JB	265	wdev->wext.keys->def = wdev->wext.default_key;
	266
	267	wdev->wext.ibss.privacy = wdev->wext.default_key != -1;
	268
f1c1f17a	269	if (wdev->wext.keys && wdev->wext.keys->def != -1) {
fffd0934 JB	270	ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL);
	271	if (!ck)
	272	return -ENOMEM;
585b6e13	273	for (i = 0; i < 4; i++)
fffd0934 JB	274	ck->params[i].key = ck->data[i];
	275	}
	276	err = __cfg80211_join_ibss(rdev, wdev->netdev,
	277	&wdev->wext.ibss, ck);
	278	if (err)
	279	kfree(ck);
	280
	281	return err;
04a773ad JB	282	}
	283
	284	int cfg80211_ibss_wext_siwfreq(struct net_device *dev,
	285	struct iw_request_info *info,
59bbb6f7	286	struct iw_freq wextfreq, char extra)
04a773ad JB	287	{
04a773ad JB	288	struct wireless_dev *wdev = dev->ieee80211_ptr;
f26cbf40	289	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
59bbb6f7 JB	290	struct ieee80211_channel *chan = NULL;
59bbb6f7 JB	291	int err, freq;
04a773ad JB	292
	293	/* call only for ibss! */
	294	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	295	return -EINVAL;
	296
59bbb6f7	297	if (!rdev->ops->join_ibss)
04a773ad JB	298	return -EOPNOTSUPP;
04a773ad JB	299
96998e3a	300	freq = cfg80211_wext_freq(wextfreq);
59bbb6f7 JB	301	if (freq < 0)
59bbb6f7 JB	302	return freq;
04a773ad	303
59bbb6f7 JB	304	if (freq) {
	305	chan = ieee80211_get_channel(wdev->wiphy, freq);
	306	if (!chan)
	307	return -EINVAL;
8fe02e16	308	if (chan->flags & IEEE80211_CHAN_NO_IR \|\|
59bbb6f7 JB	309	chan->flags & IEEE80211_CHAN_DISABLED)
	310	return -EINVAL;
	311	}
04a773ad	312
683b6d3b	313	if (wdev->wext.ibss.chandef.chan == chan)
04a773ad JB	314	return 0;
04a773ad JB	315
667503dd	316	err = 0;
7b0a0e3c	317	if (wdev->u.ibss.ssid_len)
076fc877	318	err = cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	319
	320	if (err)
	321	return err;
04a773ad JB	322
04a773ad JB	323	if (chan) {
1fe4517c SW	324	cfg80211_chandef_create(&wdev->wext.ibss.chandef, chan,
1fe4517c SW	325	NL80211_CHAN_NO_HT);
cbe8fa9c	326	wdev->wext.ibss.channel_fixed = true;
04a773ad JB	327	} else {
04a773ad JB	328	/* cfg80211_ibss_wext_join will pick one if needed */
cbe8fa9c	329	wdev->wext.ibss.channel_fixed = false;
04a773ad JB	330	}
04a773ad JB	331
076fc877	332	return cfg80211_ibss_wext_join(rdev, wdev);
04a773ad	333	}
04a773ad JB	334
	335	int cfg80211_ibss_wext_giwfreq(struct net_device *dev,
	336	struct iw_request_info *info,
	337	struct iw_freq freq, char extra)
	338	{
	339	struct wireless_dev *wdev = dev->ieee80211_ptr;
	340	struct ieee80211_channel *chan = NULL;
	341
	342	/* call only for ibss! */
	343	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	344	return -EINVAL;
	345
7b0a0e3c JB	346	if (wdev->u.ibss.current_bss)
7b0a0e3c JB	347	chan = wdev->u.ibss.current_bss->pub.channel;
683b6d3b JB	348	else if (wdev->wext.ibss.chandef.chan)
683b6d3b JB	349	chan = wdev->wext.ibss.chandef.chan;
04a773ad JB	350
	351	if (chan) {
	352	freq->m = chan->center_freq;
	353	freq->e = 6;
	354	return 0;
	355	}
	356
	357	/* no channel if not joining */
	358	return -EINVAL;
	359	}
04a773ad JB	360
	361	int cfg80211_ibss_wext_siwessid(struct net_device *dev,
	362	struct iw_request_info *info,
	363	struct iw_point data, char ssid)
	364	{
	365	struct wireless_dev *wdev = dev->ieee80211_ptr;
f26cbf40	366	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
04a773ad JB	367	size_t len = data->length;
	368	int err;
	369
	370	/* call only for ibss! */
	371	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	372	return -EINVAL;
	373
59bbb6f7	374	if (!rdev->ops->join_ibss)
04a773ad JB	375	return -EOPNOTSUPP;
04a773ad JB	376
667503dd	377	err = 0;
7b0a0e3c	378	if (wdev->u.ibss.ssid_len)
076fc877	379	err = cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	380
	381	if (err)
	382	return err;
04a773ad JB	383
	384	/* iwconfig uses nul termination in SSID.. */
	385	if (len > 0 && ssid[len - 1] == '\0')
	386	len--;
	387
7b0a0e3c JB	388	memcpy(wdev->u.ibss.ssid, ssid, len);
7b0a0e3c JB	389	wdev->wext.ibss.ssid = wdev->u.ibss.ssid;
cbe8fa9c	390	wdev->wext.ibss.ssid_len = len;
04a773ad	391
076fc877	392	return cfg80211_ibss_wext_join(rdev, wdev);
04a773ad	393	}
04a773ad JB	394
	395	int cfg80211_ibss_wext_giwessid(struct net_device *dev,
	396	struct iw_request_info *info,
	397	struct iw_point data, char ssid)
	398	{
	399	struct wireless_dev *wdev = dev->ieee80211_ptr;
	400
	401	/* call only for ibss! */
	402	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	403	return -EINVAL;
	404
	405	data->flags = 0;
	406
7b0a0e3c	407	if (wdev->u.ibss.ssid_len) {
04a773ad	408	data->flags = 1;
7b0a0e3c JB	409	data->length = wdev->u.ibss.ssid_len;
7b0a0e3c JB	410	memcpy(ssid, wdev->u.ibss.ssid, data->length);
cbe8fa9c	411	} else if (wdev->wext.ibss.ssid && wdev->wext.ibss.ssid_len) {
04a773ad	412	data->flags = 1;
cbe8fa9c JB	413	data->length = wdev->wext.ibss.ssid_len;
cbe8fa9c JB	414	memcpy(ssid, wdev->wext.ibss.ssid, data->length);
04a773ad JB	415	}
	416
	417	return 0;
	418	}
04a773ad JB	419
	420	int cfg80211_ibss_wext_siwap(struct net_device *dev,
	421	struct iw_request_info *info,
	422	struct sockaddr ap_addr, char extra)
	423	{
	424	struct wireless_dev *wdev = dev->ieee80211_ptr;
f26cbf40	425	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
04a773ad JB	426	u8 *bssid = ap_addr->sa_data;
	427	int err;
	428
	429	/* call only for ibss! */
	430	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	431	return -EINVAL;
	432
59bbb6f7	433	if (!rdev->ops->join_ibss)
04a773ad JB	434	return -EOPNOTSUPP;
	435
	436	if (ap_addr->sa_family != ARPHRD_ETHER)
	437	return -EINVAL;
	438
	439	/* automatic mode */
	440	if (is_zero_ether_addr(bssid) \|\| is_broadcast_ether_addr(bssid))
	441	bssid = NULL;
	442
74f82741 JB	443	if (bssid && !is_valid_ether_addr(bssid))
	444	return -EINVAL;
	445
04a773ad	446	/* both automatic */
cbe8fa9c	447	if (!bssid && !wdev->wext.ibss.bssid)
04a773ad JB	448	return 0;
	449
	450	/* fixed already - and no change */
cbe8fa9c	451	if (wdev->wext.ibss.bssid && bssid &&
ac422d3c	452	ether_addr_equal(bssid, wdev->wext.ibss.bssid))
04a773ad JB	453	return 0;
04a773ad JB	454
667503dd	455	err = 0;
7b0a0e3c	456	if (wdev->u.ibss.ssid_len)
076fc877	457	err = cfg80211_leave_ibss(rdev, dev, true);
667503dd JB	458
	459	if (err)
	460	return err;
04a773ad JB	461
04a773ad JB	462	if (bssid) {
cbe8fa9c JB	463	memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
cbe8fa9c JB	464	wdev->wext.ibss.bssid = wdev->wext.bssid;
04a773ad	465	} else
cbe8fa9c	466	wdev->wext.ibss.bssid = NULL;
04a773ad	467
076fc877	468	return cfg80211_ibss_wext_join(rdev, wdev);
04a773ad	469	}
04a773ad JB	470
	471	int cfg80211_ibss_wext_giwap(struct net_device *dev,
	472	struct iw_request_info *info,
	473	struct sockaddr ap_addr, char extra)
	474	{
	475	struct wireless_dev *wdev = dev->ieee80211_ptr;
	476
	477	/* call only for ibss! */
	478	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	479	return -EINVAL;
	480
	481	ap_addr->sa_family = ARPHRD_ETHER;
	482
7b0a0e3c JB	483	if (wdev->u.ibss.current_bss)
	484	memcpy(ap_addr->sa_data, wdev->u.ibss.current_bss->pub.bssid,
	485	ETH_ALEN);
80e5b06a	486	else if (wdev->wext.ibss.bssid)
cbe8fa9c	487	memcpy(ap_addr->sa_data, wdev->wext.ibss.bssid, ETH_ALEN);
80e5b06a	488	else
d2beae10	489	eth_zero_addr(ap_addr->sa_data);
80e5b06a	490
04a773ad JB	491	return 0;
04a773ad JB	492	}
04a773ad	493	#endif