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