[deliverable/linux.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;

	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->pub);
	}

	cfg80211_hold_bss(bss_from_pub(bss));
	wdev->current_bss = bss_from_pub(bss);

	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->pub);
	}

	wdev->current_bss = NULL;
	wdev->ssid_len = 0;
#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)
{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	int err;

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

	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->pub.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->current_bss)
		memcpy(ap_addr->sa_data, wdev->current_bss->pub.bssid, ETH_ALEN);
	else
		memcpy(ap_addr->sa_data, wdev->wext.ibss.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
04a773ad JB	27	bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
	28	wdev->ssid, wdev->ssid_len,
	29	WLAN_CAPABILITY_IBSS, WLAN_CAPABILITY_IBSS);
	30
	31	if (WARN_ON(!bss))
	32	return;
	33
	34	if (wdev->current_bss) {
	35	cfg80211_unhold_bss(wdev->current_bss);
19957bb3	36	cfg80211_put_bss(&wdev->current_bss->pub);
04a773ad JB	37	}
04a773ad JB	38
19957bb3 JB	39	cfg80211_hold_bss(bss_from_pub(bss));
19957bb3 JB	40	wdev->current_bss = bss_from_pub(bss);
04a773ad JB	41
	42	nl80211_send_ibss_bssid(wiphy_to_dev(wdev->wiphy), dev, bssid, gfp);
	43	#ifdef CONFIG_WIRELESS_EXT
	44	memset(&wrqu, 0, sizeof(wrqu));
	45	memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
	46	wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
	47	#endif
	48	}
	49	EXPORT_SYMBOL(cfg80211_ibss_joined);
	50
	51	int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
	52	struct net_device *dev,
	53	struct cfg80211_ibss_params *params)
	54	{
	55	struct wireless_dev *wdev = dev->ieee80211_ptr;
	56	int err;
	57
	58	if (wdev->ssid_len)
	59	return -EALREADY;
	60
	61	#ifdef CONFIG_WIRELESS_EXT
cbe8fa9c	62	wdev->wext.ibss.channel = params->channel;
04a773ad JB	63	#endif
	64	err = rdev->ops->join_ibss(&rdev->wiphy, dev, params);
	65
	66	if (err)
	67	return err;
	68
	69	memcpy(wdev->ssid, params->ssid, params->ssid_len);
	70	wdev->ssid_len = params->ssid_len;
	71
	72	return 0;
	73	}
	74
9d308429	75	void cfg80211_clear_ibss(struct net_device *dev, bool nowext)
04a773ad JB	76	{
	77	struct wireless_dev *wdev = dev->ieee80211_ptr;
	78
	79	if (wdev->current_bss) {
	80	cfg80211_unhold_bss(wdev->current_bss);
19957bb3	81	cfg80211_put_bss(&wdev->current_bss->pub);
04a773ad JB	82	}
	83
	84	wdev->current_bss = NULL;
	85	wdev->ssid_len = 0;
9d308429 JB	86	#ifdef CONFIG_WIRELESS_EXT
9d308429 JB	87	if (!nowext)
cbe8fa9c	88	wdev->wext.ibss.ssid_len = 0;
9d308429	89	#endif
04a773ad JB	90	}
	91
	92	int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
9d308429	93	struct net_device *dev, bool nowext)
04a773ad	94	{
78485475	95	struct wireless_dev *wdev = dev->ieee80211_ptr;
04a773ad JB	96	int err;
04a773ad JB	97
78485475 JB	98	if (!wdev->ssid_len)
	99	return -ENOLINK;
	100
04a773ad JB	101	err = rdev->ops->leave_ibss(&rdev->wiphy, dev);
	102
	103	if (err)
	104	return err;
	105
9d308429	106	cfg80211_clear_ibss(dev, nowext);
04a773ad JB	107
	108	return 0;
	109	}
	110
	111	#ifdef CONFIG_WIRELESS_EXT
	112	static int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
	113	struct wireless_dev *wdev)
	114	{
	115	enum ieee80211_band band;
	116	int i;
	117
cbe8fa9c JB	118	if (!wdev->wext.ibss.beacon_interval)
cbe8fa9c JB	119	wdev->wext.ibss.beacon_interval = 100;
8e30bc55	120
04a773ad	121	/* try to find an IBSS channel if none requested ... */
cbe8fa9c	122	if (!wdev->wext.ibss.channel) {
04a773ad JB	123	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
	124	struct ieee80211_supported_band *sband;
	125	struct ieee80211_channel *chan;
	126
	127	sband = rdev->wiphy.bands[band];
	128	if (!sband)
	129	continue;
	130
	131	for (i = 0; i < sband->n_channels; i++) {
	132	chan = &sband->channels[i];
	133	if (chan->flags & IEEE80211_CHAN_NO_IBSS)
	134	continue;
	135	if (chan->flags & IEEE80211_CHAN_DISABLED)
	136	continue;
cbe8fa9c	137	wdev->wext.ibss.channel = chan;
04a773ad JB	138	break;
	139	}
	140
cbe8fa9c	141	if (wdev->wext.ibss.channel)
04a773ad JB	142	break;
	143	}
	144
cbe8fa9c	145	if (!wdev->wext.ibss.channel)
04a773ad JB	146	return -EINVAL;
	147	}
	148
	149	/* don't join -- SSID is not there */
cbe8fa9c	150	if (!wdev->wext.ibss.ssid_len)
04a773ad JB	151	return 0;
	152
	153	if (!netif_running(wdev->netdev))
	154	return 0;
	155
	156	return cfg80211_join_ibss(wiphy_to_dev(wdev->wiphy),
cbe8fa9c	157	wdev->netdev, &wdev->wext.ibss);
04a773ad JB	158	}
	159
	160	int cfg80211_ibss_wext_siwfreq(struct net_device *dev,
	161	struct iw_request_info *info,
	162	struct iw_freq freq, char extra)
	163	{
	164	struct wireless_dev *wdev = dev->ieee80211_ptr;
	165	struct ieee80211_channel *chan;
	166	int err;
	167
	168	/* call only for ibss! */
	169	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	170	return -EINVAL;
	171
	172	if (!wiphy_to_dev(wdev->wiphy)->ops->join_ibss)
	173	return -EOPNOTSUPP;
	174
	175	chan = cfg80211_wext_freq(wdev->wiphy, freq);
	176	if (chan && IS_ERR(chan))
	177	return PTR_ERR(chan);
	178
	179	if (chan &&
	180	(chan->flags & IEEE80211_CHAN_NO_IBSS \|\|
	181	chan->flags & IEEE80211_CHAN_DISABLED))
	182	return -EINVAL;
	183
cbe8fa9c	184	if (wdev->wext.ibss.channel == chan)
04a773ad JB	185	return 0;
	186
	187	if (wdev->ssid_len) {
9d308429 JB	188	err = cfg80211_leave_ibss(wiphy_to_dev(wdev->wiphy),
9d308429 JB	189	dev, true);
04a773ad JB	190	if (err)
	191	return err;
	192	}
	193
	194	if (chan) {
cbe8fa9c JB	195	wdev->wext.ibss.channel = chan;
cbe8fa9c JB	196	wdev->wext.ibss.channel_fixed = true;
04a773ad JB	197	} else {
04a773ad JB	198	/* cfg80211_ibss_wext_join will pick one if needed */
cbe8fa9c	199	wdev->wext.ibss.channel_fixed = false;
04a773ad JB	200	}
	201
	202	return cfg80211_ibss_wext_join(wiphy_to_dev(wdev->wiphy), wdev);
	203	}
	204	/* temporary symbol - mark GPL - in the future the handler won't be */
	205	EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_siwfreq);
	206
	207	int cfg80211_ibss_wext_giwfreq(struct net_device *dev,
	208	struct iw_request_info *info,
	209	struct iw_freq freq, char extra)
	210	{
	211	struct wireless_dev *wdev = dev->ieee80211_ptr;
	212	struct ieee80211_channel *chan = NULL;
	213
	214	/* call only for ibss! */
	215	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	216	return -EINVAL;
	217
	218	if (wdev->current_bss)
19957bb3	219	chan = wdev->current_bss->pub.channel;
cbe8fa9c JB	220	else if (wdev->wext.ibss.channel)
cbe8fa9c JB	221	chan = wdev->wext.ibss.channel;
04a773ad JB	222
	223	if (chan) {
	224	freq->m = chan->center_freq;
	225	freq->e = 6;
	226	return 0;
	227	}
	228
	229	/* no channel if not joining */
	230	return -EINVAL;
	231	}
	232	/* temporary symbol - mark GPL - in the future the handler won't be */
	233	EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_giwfreq);
	234
	235	int cfg80211_ibss_wext_siwessid(struct net_device *dev,
	236	struct iw_request_info *info,
	237	struct iw_point data, char ssid)
	238	{
	239	struct wireless_dev *wdev = dev->ieee80211_ptr;
	240	size_t len = data->length;
	241	int err;
	242
	243	/* call only for ibss! */
	244	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	245	return -EINVAL;
	246
	247	if (!wiphy_to_dev(wdev->wiphy)->ops->join_ibss)
	248	return -EOPNOTSUPP;
	249
	250	if (wdev->ssid_len) {
9d308429 JB	251	err = cfg80211_leave_ibss(wiphy_to_dev(wdev->wiphy),
9d308429 JB	252	dev, true);
04a773ad JB	253	if (err)
	254	return err;
	255	}
	256
	257	/* iwconfig uses nul termination in SSID.. */
	258	if (len > 0 && ssid[len - 1] == '\0')
	259	len--;
	260
cbe8fa9c JB	261	wdev->wext.ibss.ssid = wdev->ssid;
	262	memcpy(wdev->wext.ibss.ssid, ssid, len);
	263	wdev->wext.ibss.ssid_len = len;
04a773ad JB	264
	265	return cfg80211_ibss_wext_join(wiphy_to_dev(wdev->wiphy), wdev);
	266	}
	267	/* temporary symbol - mark GPL - in the future the handler won't be */
	268	EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_siwessid);
	269
	270	int cfg80211_ibss_wext_giwessid(struct net_device *dev,
	271	struct iw_request_info *info,
	272	struct iw_point data, char ssid)
	273	{
	274	struct wireless_dev *wdev = dev->ieee80211_ptr;
	275
	276	/* call only for ibss! */
	277	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	278	return -EINVAL;
	279
	280	data->flags = 0;
	281
	282	if (wdev->ssid_len) {
	283	data->flags = 1;
	284	data->length = wdev->ssid_len;
	285	memcpy(ssid, wdev->ssid, data->length);
cbe8fa9c	286	} else if (wdev->wext.ibss.ssid && wdev->wext.ibss.ssid_len) {
04a773ad	287	data->flags = 1;
cbe8fa9c JB	288	data->length = wdev->wext.ibss.ssid_len;
cbe8fa9c JB	289	memcpy(ssid, wdev->wext.ibss.ssid, data->length);
04a773ad JB	290	}
	291
	292	return 0;
	293	}
	294	/* temporary symbol - mark GPL - in the future the handler won't be */
	295	EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_giwessid);
	296
	297	int cfg80211_ibss_wext_siwap(struct net_device *dev,
	298	struct iw_request_info *info,
	299	struct sockaddr ap_addr, char extra)
	300	{
	301	struct wireless_dev *wdev = dev->ieee80211_ptr;
	302	u8 *bssid = ap_addr->sa_data;
	303	int err;
	304
	305	/* call only for ibss! */
	306	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	307	return -EINVAL;
	308
	309	if (!wiphy_to_dev(wdev->wiphy)->ops->join_ibss)
	310	return -EOPNOTSUPP;
	311
	312	if (ap_addr->sa_family != ARPHRD_ETHER)
	313	return -EINVAL;
	314
	315	/* automatic mode */
	316	if (is_zero_ether_addr(bssid) \|\| is_broadcast_ether_addr(bssid))
	317	bssid = NULL;
	318
	319	/* both automatic */
cbe8fa9c	320	if (!bssid && !wdev->wext.ibss.bssid)
04a773ad JB	321	return 0;
	322
	323	/* fixed already - and no change */
cbe8fa9c JB	324	if (wdev->wext.ibss.bssid && bssid &&
cbe8fa9c JB	325	compare_ether_addr(bssid, wdev->wext.ibss.bssid) == 0)
04a773ad JB	326	return 0;
	327
	328	if (wdev->ssid_len) {
9d308429 JB	329	err = cfg80211_leave_ibss(wiphy_to_dev(wdev->wiphy),
9d308429 JB	330	dev, true);
04a773ad JB	331	if (err)
	332	return err;
	333	}
	334
	335	if (bssid) {
cbe8fa9c JB	336	memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
cbe8fa9c JB	337	wdev->wext.ibss.bssid = wdev->wext.bssid;
04a773ad	338	} else
cbe8fa9c	339	wdev->wext.ibss.bssid = NULL;
04a773ad JB	340
	341	return cfg80211_ibss_wext_join(wiphy_to_dev(wdev->wiphy), wdev);
	342	}
	343	/* temporary symbol - mark GPL - in the future the handler won't be */
	344	EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_siwap);
	345
	346	int cfg80211_ibss_wext_giwap(struct net_device *dev,
	347	struct iw_request_info *info,
	348	struct sockaddr ap_addr, char extra)
	349	{
	350	struct wireless_dev *wdev = dev->ieee80211_ptr;
	351
	352	/* call only for ibss! */
	353	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
	354	return -EINVAL;
	355
	356	ap_addr->sa_family = ARPHRD_ETHER;
	357
7ebbe6bd	358	if (wdev->current_bss)
19957bb3	359	memcpy(ap_addr->sa_data, wdev->current_bss->pub.bssid, ETH_ALEN);
7ebbe6bd	360	else
cbe8fa9c	361	memcpy(ap_addr->sa_data, wdev->wext.ibss.bssid, ETH_ALEN);
04a773ad JB	362	return 0;
	363	}
	364	/* temporary symbol - mark GPL - in the future the handler won't be */
	365	EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_giwap);
	366	#endif