[mirror_ubuntu-bionic-kernel.git] / net / wireless / ibss.c

/*
 * Some IBSS support code for cfg80211.
 *
 * Copyright 2009	Johannes Berg <johannes@sipsolutions.net>
 */

#include <linux/etherdevice.h>
#include <linux/if_arp.h>
#include <net/cfg80211.h>
#include "nl80211.h"


void cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, gfp_t gfp)
{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	struct cfg80211_bss *bss;
#ifdef CONFIG_WIRELESS_EXT
	union iwreq_data wrqu;
#endif

	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
		return;

	if (WARN_ON(!wdev->ssid_len))
		return;

	if (memcmp(bssid, wdev->bssid, ETH_ALEN) == 0)
		return;

	bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
			       wdev->ssid, wdev->ssid_len,
			       WLAN_CAPABILITY_IBSS, WLAN_CAPABILITY_IBSS);

	if (WARN_ON(!bss))
		return;

	if (wdev->current_bss) {
		cfg80211_unhold_bss(wdev->current_bss);
		cfg80211_put_bss(wdev->current_bss);
	}

	cfg80211_hold_bss(bss);
	wdev->current_bss = bss;
	memcpy(wdev->bssid, bssid, ETH_ALEN);

	nl80211_send_ibss_bssid(wiphy_to_dev(wdev->wiphy), dev, bssid, gfp);
#ifdef CONFIG_WIRELESS_EXT
	memset(&wrqu, 0, sizeof(wrqu));
	memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
	wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
#endif
}
EXPORT_SYMBOL(cfg80211_ibss_joined);

int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
		       struct net_device *dev,
		       struct cfg80211_ibss_params *params)
{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	int err;

	if (wdev->ssid_len)
		return -EALREADY;

#ifdef CONFIG_WIRELESS_EXT
	wdev->wext.ibss.channel = params->channel;
#endif
	err = rdev->ops->join_ibss(&rdev->wiphy, dev, params);

	if (err)
		return err;

	memcpy(wdev->ssid, params->ssid, params->ssid_len);
	wdev->ssid_len = params->ssid_len;

	return 0;
}

void cfg80211_clear_ibss(struct net_device *dev, bool nowext)
{
	struct wireless_dev *wdev = dev->ieee80211_ptr;

	if (wdev->current_bss) {
		cfg80211_unhold_bss(wdev->current_bss);
		cfg80211_put_bss(wdev->current_bss);
	}

	wdev->current_bss = NULL;
	wdev->ssid_len = 0;
	memset(wdev->bssid, 0, ETH_ALEN);
#ifdef CONFIG_WIRELESS_EXT
	if (!nowext)
		wdev->wext.ibss.ssid_len = 0;
#endif
}

int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
			struct net_device *dev, bool nowext)
{
	int err;

	err = rdev->ops->leave_ibss(&rdev->wiphy, dev);

	if (err)
		return err;

	cfg80211_clear_ibss(dev, nowext);

	return 0;
}

#ifdef CONFIG_WIRELESS_EXT
static int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
				   struct wireless_dev *wdev)
{
	enum ieee80211_band band;
	int i;

	if (!wdev->wext.ibss.beacon_interval)
		wdev->wext.ibss.beacon_interval = 100;

	/* try to find an IBSS channel if none requested ... */
	if (!wdev->wext.ibss.channel) {
		for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
			struct ieee80211_supported_band *sband;
			struct ieee80211_channel *chan;

			sband = rdev->wiphy.bands[band];
			if (!sband)
				continue;

			for (i = 0; i < sband->n_channels; i++) {
				chan = &sband->channels[i];
				if (chan->flags & IEEE80211_CHAN_NO_IBSS)
					continue;
				if (chan->flags & IEEE80211_CHAN_DISABLED)
					continue;
				wdev->wext.ibss.channel = chan;
				break;
			}

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

		if (!wdev->wext.ibss.channel)
			return -EINVAL;
	}

	/* don't join -- SSID is not there */
	if (!wdev->wext.ibss.ssid_len)
		return 0;

	if (!netif_running(wdev->netdev))
		return 0;

	return cfg80211_join_ibss(wiphy_to_dev(wdev->wiphy),
				  wdev->netdev, &wdev->wext.ibss);
}

int cfg80211_ibss_wext_siwfreq(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;
	int err;

	/* call only for ibss! */
	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
		return -EINVAL;

	if (!wiphy_to_dev(wdev->wiphy)->ops->join_ibss)
		return -EOPNOTSUPP;

	chan = cfg80211_wext_freq(wdev->wiphy, freq);
	if (chan && IS_ERR(chan))
		return PTR_ERR(chan);

	if (chan &&
	    (chan->flags & IEEE80211_CHAN_NO_IBSS ||
	     chan->flags & IEEE80211_CHAN_DISABLED))
		return -EINVAL;

	if (wdev->wext.ibss.channel == chan)
		return 0;

	if (wdev->ssid_len) {
		err = cfg80211_leave_ibss(wiphy_to_dev(wdev->wiphy),
					  dev, true);
		if (err)
			return err;
	}

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

	return cfg80211_ibss_wext_join(wiphy_to_dev(wdev->wiphy), wdev);
}
/* temporary symbol - mark GPL - in the future the handler won't be */
EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_siwfreq);

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->current_bss)
		chan = wdev->current_bss->channel;
	else if (wdev->wext.ibss.channel)
		chan = wdev->wext.ibss.channel;

	if (chan) {
		freq->m = chan->center_freq;
		freq->e = 6;
		return 0;
	}

	/* no channel if not joining */
	return -EINVAL;
}
/* temporary symbol - mark GPL - in the future the handler won't be */
EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_giwfreq);

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;
	size_t len = data->length;
	int err;

	/* call only for ibss! */
	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
		return -EINVAL;

	if (!wiphy_to_dev(wdev->wiphy)->ops->join_ibss)
		return -EOPNOTSUPP;

	if (wdev->ssid_len) {
		err = cfg80211_leave_ibss(wiphy_to_dev(wdev->wiphy),
					  dev, true);
		if (err)
			return err;
	}

	/* iwconfig uses nul termination in SSID.. */
	if (len > 0 && ssid[len - 1] == '\0')
		len--;

	wdev->wext.ibss.ssid = wdev->ssid;
	memcpy(wdev->wext.ibss.ssid, ssid, len);
	wdev->wext.ibss.ssid_len = len;

	return cfg80211_ibss_wext_join(wiphy_to_dev(wdev->wiphy), wdev);
}
/* temporary symbol - mark GPL - in the future the handler won't be */
EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_siwessid);

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->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);
	}

	return 0;
}
/* temporary symbol - mark GPL - in the future the handler won't be */
EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_giwessid);

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;
	u8 *bssid = ap_addr->sa_data;
	int err;

	/* call only for ibss! */
	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
		return -EINVAL;

	if (!wiphy_to_dev(wdev->wiphy)->ops->join_ibss)
		return -EOPNOTSUPP;

	if (ap_addr->sa_family != ARPHRD_ETHER)
		return -EINVAL;

	/* automatic mode */
	if (is_zero_ether_addr(bssid) || is_broadcast_ether_addr(bssid))
		bssid = NULL;

	/* both automatic */
	if (!bssid && !wdev->wext.ibss.bssid)
		return 0;

	/* fixed already - and no change */
	if (wdev->wext.ibss.bssid && bssid &&
	    compare_ether_addr(bssid, wdev->wext.ibss.bssid) == 0)
		return 0;

	if (wdev->ssid_len) {
		err = cfg80211_leave_ibss(wiphy_to_dev(wdev->wiphy),
					  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(wiphy_to_dev(wdev->wiphy), wdev);
}
/* temporary symbol - mark GPL - in the future the handler won't be */
EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_siwap);

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->wext.ibss.bssid) {
		memcpy(ap_addr->sa_data, wdev->wext.ibss.bssid, ETH_ALEN);
		return 0;
	}

	memcpy(ap_addr->sa_data, wdev->bssid, ETH_ALEN);
	return 0;
}
/* temporary symbol - mark GPL - in the future the handler won't be */
EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_giwap);
#endif
Commit	Line	Data
04a773ad JB	1	/*
	2	* Some IBSS support code for cfg80211.
	3	*
	4	* Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
	5	*/
	6
	7	#include <linux/etherdevice.h>
	8	#include <linux/if_arp.h>
	9	#include <net/cfg80211.h>
04a773ad JB	10	#include "nl80211.h"
	11
	12
	13	void cfg80211_ibss_joined(struct net_device dev, const u8 bssid, gfp_t gfp)
	14	{
	15	struct wireless_dev *wdev = dev->ieee80211_ptr;
	16	struct cfg80211_bss *bss;
	17	#ifdef CONFIG_WIRELESS_EXT
	18	union iwreq_data wrqu;
	19	#endif
	20
	21	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	22	return;
	23
	24	if (WARN_ON(!wdev->ssid_len))
	25	return;
	26
	27	if (memcmp(bssid, wdev->bssid, ETH_ALEN) == 0)
	28	return;
	29
	30	bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
	31	wdev->ssid, wdev->ssid_len,
	32	WLAN_CAPABILITY_IBSS, WLAN_CAPABILITY_IBSS);
	33
	34	if (WARN_ON(!bss))
	35	return;
	36
	37	if (wdev->current_bss) {
	38	cfg80211_unhold_bss(wdev->current_bss);
	39	cfg80211_put_bss(wdev->current_bss);
	40	}
	41
	42	cfg80211_hold_bss(bss);
	43	wdev->current_bss = bss;
	44	memcpy(wdev->bssid, bssid, ETH_ALEN);
	45
	46	nl80211_send_ibss_bssid(wiphy_to_dev(wdev->wiphy), dev, bssid, gfp);
	47	#ifdef CONFIG_WIRELESS_EXT
	48	memset(&wrqu, 0, sizeof(wrqu));
	49	memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
	50	wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
	51	#endif
	52	}
	53	EXPORT_SYMBOL(cfg80211_ibss_joined);
	54
	55	int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
	56	struct net_device *dev,
	57	struct cfg80211_ibss_params *params)
	58	{
	59	struct wireless_dev *wdev = dev->ieee80211_ptr;
	60	int err;
	61
	62	if (wdev->ssid_len)
	63	return -EALREADY;
	64
	65	#ifdef CONFIG_WIRELESS_EXT
cbe8fa9c	66	wdev->wext.ibss.channel = params->channel;
04a773ad JB	67	#endif
	68	err = rdev->ops->join_ibss(&rdev->wiphy, dev, params);
	69
	70	if (err)
	71	return err;
	72
	73	memcpy(wdev->ssid, params->ssid, params->ssid_len);
	74	wdev->ssid_len = params->ssid_len;
	75
	76	return 0;
	77	}
	78
9d308429	79	void cfg80211_clear_ibss(struct net_device *dev, bool nowext)
04a773ad JB	80	{
	81	struct wireless_dev *wdev = dev->ieee80211_ptr;
	82
	83	if (wdev->current_bss) {
	84	cfg80211_unhold_bss(wdev->current_bss);
	85	cfg80211_put_bss(wdev->current_bss);
	86	}
	87
	88	wdev->current_bss = NULL;
	89	wdev->ssid_len = 0;
	90	memset(wdev->bssid, 0, ETH_ALEN);
9d308429 JB	91	#ifdef CONFIG_WIRELESS_EXT
9d308429 JB	92	if (!nowext)
cbe8fa9c	93	wdev->wext.ibss.ssid_len = 0;
9d308429	94	#endif
04a773ad JB	95	}
	96
	97	int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
9d308429	98	struct net_device *dev, bool nowext)
04a773ad JB	99	{
	100	int err;
	101
	102	err = rdev->ops->leave_ibss(&rdev->wiphy, dev);
	103
	104	if (err)
	105	return err;
	106
9d308429	107	cfg80211_clear_ibss(dev, nowext);
04a773ad JB	108
	109	return 0;
	110	}
	111
	112	#ifdef CONFIG_WIRELESS_EXT
	113	static int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
	114	struct wireless_dev *wdev)
	115	{
	116	enum ieee80211_band band;
	117	int i;
	118
cbe8fa9c JB	119	if (!wdev->wext.ibss.beacon_interval)
cbe8fa9c JB	120	wdev->wext.ibss.beacon_interval = 100;
8e30bc55	121
04a773ad	122	/* try to find an IBSS channel if none requested ... */
cbe8fa9c	123	if (!wdev->wext.ibss.channel) {
04a773ad JB	124	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
	125	struct ieee80211_supported_band *sband;
	126	struct ieee80211_channel *chan;
	127
	128	sband = rdev->wiphy.bands[band];
	129	if (!sband)
	130	continue;
	131
	132	for (i = 0; i < sband->n_channels; i++) {
	133	chan = &sband->channels[i];
	134	if (chan->flags & IEEE80211_CHAN_NO_IBSS)
	135	continue;
	136	if (chan->flags & IEEE80211_CHAN_DISABLED)
	137	continue;
cbe8fa9c	138	wdev->wext.ibss.channel = chan;
04a773ad JB	139	break;
	140	}
	141
cbe8fa9c	142	if (wdev->wext.ibss.channel)
04a773ad JB	143	break;
	144	}
	145
cbe8fa9c	146	if (!wdev->wext.ibss.channel)
04a773ad JB	147	return -EINVAL;
	148	}
	149
	150	/* don't join -- SSID is not there */
cbe8fa9c	151	if (!wdev->wext.ibss.ssid_len)
04a773ad JB	152	return 0;
	153
	154	if (!netif_running(wdev->netdev))
	155	return 0;
	156
	157	return cfg80211_join_ibss(wiphy_to_dev(wdev->wiphy),
cbe8fa9c	158	wdev->netdev, &wdev->wext.ibss);
04a773ad JB	159	}
	160
	161	int cfg80211_ibss_wext_siwfreq(struct net_device *dev,
	162	struct iw_request_info *info,
	163	struct iw_freq freq, char extra)
	164	{
	165	struct wireless_dev *wdev = dev->ieee80211_ptr;
	166	struct ieee80211_channel *chan;
	167	int err;
	168
	169	/* call only for ibss! */
	170	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	171	return -EINVAL;
	172
	173	if (!wiphy_to_dev(wdev->wiphy)->ops->join_ibss)
	174	return -EOPNOTSUPP;
	175
	176	chan = cfg80211_wext_freq(wdev->wiphy, freq);
	177	if (chan && IS_ERR(chan))
	178	return PTR_ERR(chan);
	179
	180	if (chan &&
	181	(chan->flags & IEEE80211_CHAN_NO_IBSS \|\|
	182	chan->flags & IEEE80211_CHAN_DISABLED))
	183	return -EINVAL;
	184
cbe8fa9c	185	if (wdev->wext.ibss.channel == chan)
04a773ad JB	186	return 0;
	187
	188	if (wdev->ssid_len) {
9d308429 JB	189	err = cfg80211_leave_ibss(wiphy_to_dev(wdev->wiphy),
9d308429 JB	190	dev, true);
04a773ad JB	191	if (err)
	192	return err;
	193	}
	194
	195	if (chan) {
cbe8fa9c JB	196	wdev->wext.ibss.channel = chan;
cbe8fa9c JB	197	wdev->wext.ibss.channel_fixed = true;
04a773ad JB	198	} else {
04a773ad JB	199	/* cfg80211_ibss_wext_join will pick one if needed */
cbe8fa9c	200	wdev->wext.ibss.channel_fixed = false;
04a773ad JB	201	}
	202
	203	return cfg80211_ibss_wext_join(wiphy_to_dev(wdev->wiphy), wdev);
	204	}
	205	/* temporary symbol - mark GPL - in the future the handler won't be */
	206	EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_siwfreq);
	207
	208	int cfg80211_ibss_wext_giwfreq(struct net_device *dev,
	209	struct iw_request_info *info,
	210	struct iw_freq freq, char extra)
	211	{
	212	struct wireless_dev *wdev = dev->ieee80211_ptr;
	213	struct ieee80211_channel *chan = NULL;
	214
	215	/* call only for ibss! */
	216	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	217	return -EINVAL;
	218
	219	if (wdev->current_bss)
	220	chan = wdev->current_bss->channel;
cbe8fa9c JB	221	else if (wdev->wext.ibss.channel)
cbe8fa9c JB	222	chan = wdev->wext.ibss.channel;
04a773ad JB	223
	224	if (chan) {
	225	freq->m = chan->center_freq;
	226	freq->e = 6;
	227	return 0;
	228	}
	229
	230	/* no channel if not joining */
	231	return -EINVAL;
	232	}
	233	/* temporary symbol - mark GPL - in the future the handler won't be */
	234	EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_giwfreq);
	235
	236	int cfg80211_ibss_wext_siwessid(struct net_device *dev,
	237	struct iw_request_info *info,
	238	struct iw_point data, char ssid)
	239	{
	240	struct wireless_dev *wdev = dev->ieee80211_ptr;
	241	size_t len = data->length;
	242	int err;
	243
	244	/* call only for ibss! */
	245	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	246	return -EINVAL;
	247
	248	if (!wiphy_to_dev(wdev->wiphy)->ops->join_ibss)
	249	return -EOPNOTSUPP;
	250
	251	if (wdev->ssid_len) {
9d308429 JB	252	err = cfg80211_leave_ibss(wiphy_to_dev(wdev->wiphy),
9d308429 JB	253	dev, true);
04a773ad JB	254	if (err)
	255	return err;
	256	}
	257
	258	/* iwconfig uses nul termination in SSID.. */
	259	if (len > 0 && ssid[len - 1] == '\0')
	260	len--;
	261
cbe8fa9c JB	262	wdev->wext.ibss.ssid = wdev->ssid;
	263	memcpy(wdev->wext.ibss.ssid, ssid, len);
	264	wdev->wext.ibss.ssid_len = len;
04a773ad JB	265
	266	return cfg80211_ibss_wext_join(wiphy_to_dev(wdev->wiphy), wdev);
	267	}
	268	/* temporary symbol - mark GPL - in the future the handler won't be */
	269	EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_siwessid);
	270
	271	int cfg80211_ibss_wext_giwessid(struct net_device *dev,
	272	struct iw_request_info *info,
	273	struct iw_point data, char ssid)
	274	{
	275	struct wireless_dev *wdev = dev->ieee80211_ptr;
	276
	277	/* call only for ibss! */
	278	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	279	return -EINVAL;
	280
	281	data->flags = 0;
	282
	283	if (wdev->ssid_len) {
	284	data->flags = 1;
	285	data->length = wdev->ssid_len;
	286	memcpy(ssid, wdev->ssid, data->length);
cbe8fa9c	287	} else if (wdev->wext.ibss.ssid && wdev->wext.ibss.ssid_len) {
04a773ad	288	data->flags = 1;
cbe8fa9c JB	289	data->length = wdev->wext.ibss.ssid_len;
cbe8fa9c JB	290	memcpy(ssid, wdev->wext.ibss.ssid, data->length);
04a773ad JB	291	}
	292
	293	return 0;
	294	}
	295	/* temporary symbol - mark GPL - in the future the handler won't be */
	296	EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_giwessid);
	297
	298	int cfg80211_ibss_wext_siwap(struct net_device *dev,
	299	struct iw_request_info *info,
	300	struct sockaddr ap_addr, char extra)
	301	{
	302	struct wireless_dev *wdev = dev->ieee80211_ptr;
	303	u8 *bssid = ap_addr->sa_data;
	304	int err;
	305
	306	/* call only for ibss! */
	307	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	308	return -EINVAL;
	309
	310	if (!wiphy_to_dev(wdev->wiphy)->ops->join_ibss)
	311	return -EOPNOTSUPP;
	312
	313	if (ap_addr->sa_family != ARPHRD_ETHER)
	314	return -EINVAL;
	315
	316	/* automatic mode */
	317	if (is_zero_ether_addr(bssid) \|\| is_broadcast_ether_addr(bssid))
	318	bssid = NULL;
	319
	320	/* both automatic */
cbe8fa9c	321	if (!bssid && !wdev->wext.ibss.bssid)
04a773ad JB	322	return 0;
	323
	324	/* fixed already - and no change */
cbe8fa9c JB	325	if (wdev->wext.ibss.bssid && bssid &&
cbe8fa9c JB	326	compare_ether_addr(bssid, wdev->wext.ibss.bssid) == 0)
04a773ad JB	327	return 0;
	328
	329	if (wdev->ssid_len) {
9d308429 JB	330	err = cfg80211_leave_ibss(wiphy_to_dev(wdev->wiphy),
9d308429 JB	331	dev, true);
04a773ad JB	332	if (err)
	333	return err;
	334	}
	335
	336	if (bssid) {
cbe8fa9c JB	337	memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
cbe8fa9c JB	338	wdev->wext.ibss.bssid = wdev->wext.bssid;
04a773ad	339	} else
cbe8fa9c	340	wdev->wext.ibss.bssid = NULL;
04a773ad JB	341
	342	return cfg80211_ibss_wext_join(wiphy_to_dev(wdev->wiphy), wdev);
	343	}
	344	/* temporary symbol - mark GPL - in the future the handler won't be */
	345	EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_siwap);
	346
	347	int cfg80211_ibss_wext_giwap(struct net_device *dev,
	348	struct iw_request_info *info,
	349	struct sockaddr ap_addr, char extra)
	350	{
	351	struct wireless_dev *wdev = dev->ieee80211_ptr;
	352
	353	/* call only for ibss! */
	354	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	355	return -EINVAL;
	356
	357	ap_addr->sa_family = ARPHRD_ETHER;
	358
cbe8fa9c JB	359	if (wdev->wext.ibss.bssid) {
cbe8fa9c JB	360	memcpy(ap_addr->sa_data, wdev->wext.ibss.bssid, ETH_ALEN);
04a773ad JB	361	return 0;
	362	}
	363
	364	memcpy(ap_addr->sa_data, wdev->bssid, ETH_ALEN);
	365	return 0;
	366	}
	367	/* temporary symbol - mark GPL - in the future the handler won't be */
	368	EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_giwap);
	369	#endif