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

/*
 * cfg80211 wext compat for managed mode.
 *
 * Copyright 2009	Johannes Berg <johannes@sipsolutions.net>
 * Copyright (C) 2009   Intel Corporation. All rights reserved.
 */

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

static int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
				     struct wireless_dev *wdev)
{
	int err;

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

	wdev->wext.connect.ie = wdev->wext.ie;
	wdev->wext.connect.ie_len = wdev->wext.ie_len;
	wdev->wext.connect.privacy = wdev->wext.default_key != -1;

	err = 0;
	if (wdev->wext.connect.ssid_len != 0)
		err = cfg80211_connect(rdev, wdev->netdev,
					&wdev->wext.connect);

	return err;
}

int cfg80211_mgd_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 cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
	struct ieee80211_channel *chan;
	int err;

	/* call only for station! */
	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
		return -EINVAL;

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

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

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

	if (wdev->sme_state != CFG80211_SME_IDLE) {
		bool event = true;
		/* if SSID set, we'll try right again, avoid event */
		if (wdev->wext.connect.ssid_len)
			event = false;
		err = cfg80211_disconnect(wiphy_to_dev(wdev->wiphy),
					  dev, WLAN_REASON_DEAUTH_LEAVING,
					  event);
		if (err)
			return err;
	}

	wdev->wext.connect.channel = chan;

	/* SSID is not set, we just want to switch channel */
	if (wdev->wext.connect.ssid_len && chan) {
		if (!rdev->ops->set_channel)
			return -EOPNOTSUPP;

		return rdev->ops->set_channel(wdev->wiphy, chan,
					      NL80211_CHAN_NO_HT);
	}

	return cfg80211_mgd_wext_connect(wiphy_to_dev(wdev->wiphy), wdev);
}
/* temporary symbol - mark GPL - in the future the handler won't be */
EXPORT_SYMBOL_GPL(cfg80211_mgd_wext_siwfreq);

int cfg80211_mgd_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 station! */
	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
		return -EINVAL;

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

int cfg80211_mgd_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 station! */
	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
		return -EINVAL;

	if (!data->flags)
		len = 0;

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

	if (wdev->wext.connect.ssid && len &&
	    len == wdev->wext.connect.ssid_len &&
	    memcmp(wdev->wext.connect.ssid, ssid, len))
		return 0;

	if (wdev->sme_state != CFG80211_SME_IDLE) {
		bool event = true;
		/* if SSID set now, we'll try to connect, avoid event */
		if (len)
			event = false;
		err = cfg80211_disconnect(wiphy_to_dev(wdev->wiphy),
					  dev, WLAN_REASON_DEAUTH_LEAVING,
					  event);
		if (err)
			return err;
	}

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

	wdev->wext.connect.crypto.control_port = false;

	return cfg80211_mgd_wext_connect(wiphy_to_dev(wdev->wiphy), wdev);
}
/* temporary symbol - mark GPL - in the future the handler won't be */
EXPORT_SYMBOL_GPL(cfg80211_mgd_wext_siwessid);

int cfg80211_mgd_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 station! */
	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
		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.connect.ssid && wdev->wext.connect.ssid_len) {
		data->flags = 1;
		data->length = wdev->wext.connect.ssid_len;
		memcpy(ssid, wdev->wext.connect.ssid, data->length);
	} else
		data->flags = 0;

	return 0;
}
/* temporary symbol - mark GPL - in the future the handler won't be */
EXPORT_SYMBOL_GPL(cfg80211_mgd_wext_giwessid);

int cfg80211_mgd_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 station! */
	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
		return -EINVAL;

	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.connect.bssid)
		return 0;

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

	if (wdev->sme_state != CFG80211_SME_IDLE) {
		err = cfg80211_disconnect(wiphy_to_dev(wdev->wiphy),
					  dev, WLAN_REASON_DEAUTH_LEAVING,
					  false);
		if (err)
			return err;
	}

	if (bssid) {
		memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
		wdev->wext.connect.bssid = wdev->wext.bssid;
	} else
		wdev->wext.connect.bssid = NULL;

	return cfg80211_mgd_wext_connect(wiphy_to_dev(wdev->wiphy), wdev);
}
/* temporary symbol - mark GPL - in the future the handler won't be */
EXPORT_SYMBOL_GPL(cfg80211_mgd_wext_siwap);

int cfg80211_mgd_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 station! */
	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
		return -EINVAL;

	ap_addr->sa_family = ARPHRD_ETHER;

	if (wdev->current_bss)
		memcpy(ap_addr->sa_data, wdev->current_bss->bssid, ETH_ALEN);
	else if (wdev->wext.connect.bssid)
		memcpy(ap_addr->sa_data, wdev->wext.connect.bssid, ETH_ALEN);
	else
		memset(ap_addr->sa_data, 0, ETH_ALEN);

	return 0;
}
/* temporary symbol - mark GPL - in the future the handler won't be */
EXPORT_SYMBOL_GPL(cfg80211_mgd_wext_giwap);

int cfg80211_wext_siwgenie(struct net_device *dev,
			   struct iw_request_info *info,
			   struct iw_point *data, char *extra)
{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
	u8 *ie = extra;
	int ie_len = data->length, err;

	if (wdev->iftype != NL80211_IFTYPE_STATION)
		return -EOPNOTSUPP;

	if (!ie_len)
		ie = NULL;

	/* no change */
	if (wdev->wext.ie_len == ie_len &&
	    memcmp(wdev->wext.ie, ie, ie_len) == 0)
		return 0;

	if (ie_len) {
		ie = kmemdup(extra, ie_len, GFP_KERNEL);
		if (!ie)
			return -ENOMEM;
	} else
		ie = NULL;

	kfree(wdev->wext.ie);
	wdev->wext.ie = ie;
	wdev->wext.ie_len = ie_len;

	if (wdev->sme_state != CFG80211_SME_IDLE) {
		err = cfg80211_disconnect(rdev, dev,
					  WLAN_REASON_DEAUTH_LEAVING, false);
		if (err)
			return err;
	}

	/* userspace better not think we'll reconnect */
	return 0;
}
EXPORT_SYMBOL_GPL(cfg80211_wext_siwgenie);

int cfg80211_wext_siwmlme(struct net_device *dev,
			  struct iw_request_info *info,
			  struct iw_point *data, char *extra)
{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	struct iw_mlme *mlme = (struct iw_mlme *)extra;
	struct cfg80211_registered_device *rdev;

	if (!wdev)
		return -EOPNOTSUPP;

	rdev = wiphy_to_dev(wdev->wiphy);

	if (wdev->iftype != NL80211_IFTYPE_STATION)
		return -EINVAL;

	if (mlme->addr.sa_family != ARPHRD_ETHER)
		return -EINVAL;

	switch (mlme->cmd) {
	case IW_MLME_DEAUTH:
	case IW_MLME_DISASSOC:
		return cfg80211_disconnect(rdev, dev, mlme->reason_code,
					   true);
	default:
		return -EOPNOTSUPP;
	}
}
EXPORT_SYMBOL_GPL(cfg80211_wext_siwmlme);
Commit	Line	Data
f2129354 JB	1	/*
	2	* cfg80211 wext compat for managed mode.
	3	*
	4	* Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
	5	* Copyright (C) 2009 Intel Corporation. All rights reserved.
	6	*/
	7
	8	#include <linux/etherdevice.h>
	9	#include <linux/if_arp.h>
	10	#include <net/cfg80211.h>
	11	#include "nl80211.h"
	12
	13	static int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
	14	struct wireless_dev *wdev)
	15	{
	16	int err;
	17
	18	if (!netif_running(wdev->netdev))
	19	return 0;
	20
	21	wdev->wext.connect.ie = wdev->wext.ie;
	22	wdev->wext.connect.ie_len = wdev->wext.ie_len;
	23	wdev->wext.connect.privacy = wdev->wext.default_key != -1;
	24
	25	err = 0;
	26	if (wdev->wext.connect.ssid_len != 0)
	27	err = cfg80211_connect(rdev, wdev->netdev,
	28	&wdev->wext.connect);
	29
	30	return err;
	31	}
	32
	33	int cfg80211_mgd_wext_siwfreq(struct net_device *dev,
	34	struct iw_request_info *info,
	35	struct iw_freq freq, char extra)
	36	{
	37	struct wireless_dev *wdev = dev->ieee80211_ptr;
	38	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
	39	struct ieee80211_channel *chan;
	40	int err;
	41
	42	/* call only for station! */
	43	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
	44	return -EINVAL;
	45
	46	chan = cfg80211_wext_freq(wdev->wiphy, freq);
	47	if (chan && IS_ERR(chan))
	48	return PTR_ERR(chan);
	49
	50	if (chan && (chan->flags & IEEE80211_CHAN_DISABLED))
	51	return -EINVAL;
	52
	53	if (wdev->wext.connect.channel == chan)
	54	return 0;
	55
	56	if (wdev->sme_state != CFG80211_SME_IDLE) {
	57	bool event = true;
	58	/* if SSID set, we'll try right again, avoid event */
	59	if (wdev->wext.connect.ssid_len)
	60	event = false;
	61	err = cfg80211_disconnect(wiphy_to_dev(wdev->wiphy),
	62	dev, WLAN_REASON_DEAUTH_LEAVING,
	63	event);
	64	if (err)
65	return err;
66	}
67
68	wdev->wext.connect.channel = chan;
69
70	/* SSID is not set, we just want to switch channel */
71	if (wdev->wext.connect.ssid_len && chan) {
72	if (!rdev->ops->set_channel)
73	return -EOPNOTSUPP;
74
75	return rdev->ops->set_channel(wdev->wiphy, chan,
76	NL80211_CHAN_NO_HT);
77	}
78
79	return cfg80211_mgd_wext_connect(wiphy_to_dev(wdev->wiphy), wdev);
80	}
81	/* temporary symbol - mark GPL - in the future the handler won't be */
82	EXPORT_SYMBOL_GPL(cfg80211_mgd_wext_siwfreq);
83
84	int cfg80211_mgd_wext_giwfreq(struct net_device *dev,
85	struct iw_request_info *info,
86	struct iw_freq freq, char extra)
87	{
88	struct wireless_dev *wdev = dev->ieee80211_ptr;
89	struct ieee80211_channel *chan = NULL;
90
91	/* call only for station! */
92	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
93	return -EINVAL;
94
95	if (wdev->current_bss)
96	chan = wdev->current_bss->channel;
97	else if (wdev->wext.connect.channel)
98	chan = wdev->wext.connect.channel;
99
100	if (chan) {
101	freq->m = chan->center_freq;
102	freq->e = 6;
103	return 0;
104	}
105
106	/* no channel if not joining */
107	return -EINVAL;
108	}
109	/* temporary symbol - mark GPL - in the future the handler won't be */
110	EXPORT_SYMBOL_GPL(cfg80211_mgd_wext_giwfreq);
111
112	int cfg80211_mgd_wext_siwessid(struct net_device *dev,
113	struct iw_request_info *info,
114	struct iw_point data, char ssid)
115	{
116	struct wireless_dev *wdev = dev->ieee80211_ptr;
117	size_t len = data->length;
118	int err;
119
120	/* call only for station! */
121	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
122	return -EINVAL;
123
124	if (!data->flags)
125	len = 0;
126
127	/* iwconfig uses nul termination in SSID.. */
128	if (len > 0 && ssid[len - 1] == '\0')
129	len--;
130
131	if (wdev->wext.connect.ssid && len &&
132	len == wdev->wext.connect.ssid_len &&
133	memcmp(wdev->wext.connect.ssid, ssid, len))
134	return 0;
135
136	if (wdev->sme_state != CFG80211_SME_IDLE) {
137	bool event = true;
138	/* if SSID set now, we'll try to connect, avoid event */
139	if (len)
140	event = false;
141	err = cfg80211_disconnect(wiphy_to_dev(wdev->wiphy),
142	dev, WLAN_REASON_DEAUTH_LEAVING,
143	event);
144	if (err)
145	return err;
146	}
147
148	wdev->wext.connect.ssid = wdev->wext.ssid;
149	memcpy(wdev->wext.ssid, ssid, len);
150	wdev->wext.connect.ssid_len = len;
151
152	wdev->wext.connect.crypto.control_port = false;
153
154	return cfg80211_mgd_wext_connect(wiphy_to_dev(wdev->wiphy), wdev);
155	}
156	/* temporary symbol - mark GPL - in the future the handler won't be */
157	EXPORT_SYMBOL_GPL(cfg80211_mgd_wext_siwessid);
158
159	int cfg80211_mgd_wext_giwessid(struct net_device *dev,
160	struct iw_request_info *info,
161	struct iw_point data, char ssid)
162	{
163	struct wireless_dev *wdev = dev->ieee80211_ptr;
164
165	/* call only for station! */
166	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
167	return -EINVAL;
168
169	data->flags = 0;
170
171	if (wdev->ssid_len) {
172	data->flags = 1;
173	data->length = wdev->ssid_len;
174	memcpy(ssid, wdev->ssid, data->length);
175	} else if (wdev->wext.connect.ssid && wdev->wext.connect.ssid_len) {
176	data->flags = 1;
177	data->length = wdev->wext.connect.ssid_len;
178	memcpy(ssid, wdev->wext.connect.ssid, data->length);
179	} else
180	data->flags = 0;
181
182	return 0;
183	}
184	/* temporary symbol - mark GPL - in the future the handler won't be */
185	EXPORT_SYMBOL_GPL(cfg80211_mgd_wext_giwessid);
186
187	int cfg80211_mgd_wext_siwap(struct net_device *dev,
188	struct iw_request_info *info,
189	struct sockaddr ap_addr, char extra)
190	{
191	struct wireless_dev *wdev = dev->ieee80211_ptr;
192	u8 *bssid = ap_addr->sa_data;
193	int err;
194
195	/* call only for station! */
196	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
197	return -EINVAL;
198
199	if (ap_addr->sa_family != ARPHRD_ETHER)
200	return -EINVAL;
201
202	/* automatic mode */
203	if (is_zero_ether_addr(bssid) \|\| is_broadcast_ether_addr(bssid))
204	bssid = NULL;
205
206	/* both automatic */
207	if (!bssid && !wdev->wext.connect.bssid)
208	return 0;
209
210	/* fixed already - and no change */
211	if (wdev->wext.connect.bssid && bssid &&
212	compare_ether_addr(bssid, wdev->wext.connect.bssid) == 0)
213	return 0;
214
215	if (wdev->sme_state != CFG80211_SME_IDLE) {
216	err = cfg80211_disconnect(wiphy_to_dev(wdev->wiphy),
217	dev, WLAN_REASON_DEAUTH_LEAVING,
218	false);
219	if (err)
220	return err;
221	}
222
223	if (bssid) {
224	memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
225	wdev->wext.connect.bssid = wdev->wext.bssid;
226	} else
227	wdev->wext.connect.bssid = NULL;
228
229	return cfg80211_mgd_wext_connect(wiphy_to_dev(wdev->wiphy), wdev);
230	}
231	/* temporary symbol - mark GPL - in the future the handler won't be */
232	EXPORT_SYMBOL_GPL(cfg80211_mgd_wext_siwap);
233
234	int cfg80211_mgd_wext_giwap(struct net_device *dev,
235	struct iw_request_info *info,
236	struct sockaddr ap_addr, char extra)
237	{
238	struct wireless_dev *wdev = dev->ieee80211_ptr;
239
240	/* call only for station! */
241	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
242	return -EINVAL;
243
244	ap_addr->sa_family = ARPHRD_ETHER;
245
246	if (wdev->current_bss)
247	memcpy(ap_addr->sa_data, wdev->current_bss->bssid, ETH_ALEN);
248	else if (wdev->wext.connect.bssid)
249	memcpy(ap_addr->sa_data, wdev->wext.connect.bssid, ETH_ALEN);
250	else
251	memset(ap_addr->sa_data, 0, ETH_ALEN);
252
253	return 0;
254	}
255	/* temporary symbol - mark GPL - in the future the handler won't be */
256	EXPORT_SYMBOL_GPL(cfg80211_mgd_wext_giwap);
257
258	int cfg80211_wext_siwgenie(struct net_device *dev,
259	struct iw_request_info *info,
260	struct iw_point data, char extra)
261	{
262	struct wireless_dev *wdev = dev->ieee80211_ptr;
263	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
264	u8 *ie = extra;
265	int ie_len = data->length, err;
266
267	if (wdev->iftype != NL80211_IFTYPE_STATION)
268	return -EOPNOTSUPP;
269
270	if (!ie_len)
271	ie = NULL;
272
273	/* no change */
274	if (wdev->wext.ie_len == ie_len &&
275	memcmp(wdev->wext.ie, ie, ie_len) == 0)
276	return 0;
277
278	if (ie_len) {
279	ie = kmemdup(extra, ie_len, GFP_KERNEL);
280	if (!ie)
281	return -ENOMEM;
282	} else
283	ie = NULL;
284
285	kfree(wdev->wext.ie);
286	wdev->wext.ie = ie;
287	wdev->wext.ie_len = ie_len;
288
289	if (wdev->sme_state != CFG80211_SME_IDLE) {
290	err = cfg80211_disconnect(rdev, dev,
291	WLAN_REASON_DEAUTH_LEAVING, false);
292	if (err)
293	return err;
294	}
295
296	/* userspace better not think we'll reconnect */
297	return 0;
298	}
299	EXPORT_SYMBOL_GPL(cfg80211_wext_siwgenie);
300
301	int cfg80211_wext_siwmlme(struct net_device *dev,
302	struct iw_request_info *info,
303	struct iw_point data, char extra)
304	{
305	struct wireless_dev *wdev = dev->ieee80211_ptr;
306	struct iw_mlme mlme = (struct iw_mlme )extra;
307	struct cfg80211_registered_device *rdev;
308
309	if (!wdev)
310	return -EOPNOTSUPP;
311
312	rdev = wiphy_to_dev(wdev->wiphy);
313
314	if (wdev->iftype != NL80211_IFTYPE_STATION)
315	return -EINVAL;
316
317	if (mlme->addr.sa_family != ARPHRD_ETHER)
318	return -EINVAL;
319
320	switch (mlme->cmd) {
321	case IW_MLME_DEAUTH:
322	case IW_MLME_DISASSOC:
323	return cfg80211_disconnect(rdev, dev, mlme->reason_code,
324	true);
325	default:
326	return -EOPNOTSUPP;
327	}
328	}
329	EXPORT_SYMBOL_GPL(cfg80211_wext_siwmlme);