Linux 4.11-rc6
[linux/fpc-iii.git] / net / wireless / wext-sme.c
blobc434f193f39aa6a1215c2791e25a891faed6b573
1 /*
2 * cfg80211 wext compat for managed mode.
4 * Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
5 * Copyright (C) 2009 Intel Corporation. All rights reserved.
6 */
8 #include <linux/export.h>
9 #include <linux/etherdevice.h>
10 #include <linux/if_arp.h>
11 #include <linux/slab.h>
12 #include <net/cfg80211.h>
13 #include <net/cfg80211-wext.h>
14 #include "wext-compat.h"
15 #include "nl80211.h"
17 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
18 struct wireless_dev *wdev)
20 struct cfg80211_cached_keys *ck = NULL;
21 const u8 *prev_bssid = NULL;
22 int err, i;
24 ASSERT_RTNL();
25 ASSERT_WDEV_LOCK(wdev);
27 if (!netif_running(wdev->netdev))
28 return 0;
30 wdev->wext.connect.ie = wdev->wext.ie;
31 wdev->wext.connect.ie_len = wdev->wext.ie_len;
33 /* Use default background scan period */
34 wdev->wext.connect.bg_scan_period = -1;
36 if (wdev->wext.keys) {
37 wdev->wext.keys->def = wdev->wext.default_key;
38 if (wdev->wext.default_key != -1)
39 wdev->wext.connect.privacy = true;
42 if (!wdev->wext.connect.ssid_len)
43 return 0;
45 if (wdev->wext.keys && wdev->wext.keys->def != -1) {
46 ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL);
47 if (!ck)
48 return -ENOMEM;
49 for (i = 0; i < CFG80211_MAX_WEP_KEYS; i++)
50 ck->params[i].key = ck->data[i];
53 if (wdev->wext.prev_bssid_valid)
54 prev_bssid = wdev->wext.prev_bssid;
56 err = cfg80211_connect(rdev, wdev->netdev,
57 &wdev->wext.connect, ck, prev_bssid);
58 if (err)
59 kzfree(ck);
61 return err;
64 int cfg80211_mgd_wext_siwfreq(struct net_device *dev,
65 struct iw_request_info *info,
66 struct iw_freq *wextfreq, char *extra)
68 struct wireless_dev *wdev = dev->ieee80211_ptr;
69 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
70 struct ieee80211_channel *chan = NULL;
71 int err, freq;
73 /* call only for station! */
74 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
75 return -EINVAL;
77 freq = cfg80211_wext_freq(wextfreq);
78 if (freq < 0)
79 return freq;
81 if (freq) {
82 chan = ieee80211_get_channel(wdev->wiphy, freq);
83 if (!chan)
84 return -EINVAL;
85 if (chan->flags & IEEE80211_CHAN_DISABLED)
86 return -EINVAL;
89 wdev_lock(wdev);
91 if (wdev->conn) {
92 bool event = true;
94 if (wdev->wext.connect.channel == chan) {
95 err = 0;
96 goto out;
99 /* if SSID set, we'll try right again, avoid event */
100 if (wdev->wext.connect.ssid_len)
101 event = false;
102 err = cfg80211_disconnect(rdev, dev,
103 WLAN_REASON_DEAUTH_LEAVING, event);
104 if (err)
105 goto out;
108 wdev->wext.connect.channel = chan;
109 err = cfg80211_mgd_wext_connect(rdev, wdev);
110 out:
111 wdev_unlock(wdev);
112 return err;
115 int cfg80211_mgd_wext_giwfreq(struct net_device *dev,
116 struct iw_request_info *info,
117 struct iw_freq *freq, char *extra)
119 struct wireless_dev *wdev = dev->ieee80211_ptr;
120 struct ieee80211_channel *chan = NULL;
122 /* call only for station! */
123 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
124 return -EINVAL;
126 wdev_lock(wdev);
127 if (wdev->current_bss)
128 chan = wdev->current_bss->pub.channel;
129 else if (wdev->wext.connect.channel)
130 chan = wdev->wext.connect.channel;
131 wdev_unlock(wdev);
133 if (chan) {
134 freq->m = chan->center_freq;
135 freq->e = 6;
136 return 0;
139 /* no channel if not joining */
140 return -EINVAL;
143 int cfg80211_mgd_wext_siwessid(struct net_device *dev,
144 struct iw_request_info *info,
145 struct iw_point *data, char *ssid)
147 struct wireless_dev *wdev = dev->ieee80211_ptr;
148 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
149 size_t len = data->length;
150 int err;
152 /* call only for station! */
153 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
154 return -EINVAL;
156 if (!data->flags)
157 len = 0;
159 /* iwconfig uses nul termination in SSID.. */
160 if (len > 0 && ssid[len - 1] == '\0')
161 len--;
163 wdev_lock(wdev);
165 err = 0;
167 if (wdev->conn) {
168 bool event = true;
170 if (wdev->wext.connect.ssid && len &&
171 len == wdev->wext.connect.ssid_len &&
172 memcmp(wdev->wext.connect.ssid, ssid, len) == 0)
173 goto out;
175 /* if SSID set now, we'll try to connect, avoid event */
176 if (len)
177 event = false;
178 err = cfg80211_disconnect(rdev, dev,
179 WLAN_REASON_DEAUTH_LEAVING, event);
180 if (err)
181 goto out;
184 wdev->wext.prev_bssid_valid = false;
185 wdev->wext.connect.ssid = wdev->wext.ssid;
186 memcpy(wdev->wext.ssid, ssid, len);
187 wdev->wext.connect.ssid_len = len;
189 wdev->wext.connect.crypto.control_port = false;
190 wdev->wext.connect.crypto.control_port_ethertype =
191 cpu_to_be16(ETH_P_PAE);
193 err = cfg80211_mgd_wext_connect(rdev, wdev);
194 out:
195 wdev_unlock(wdev);
196 return err;
199 int cfg80211_mgd_wext_giwessid(struct net_device *dev,
200 struct iw_request_info *info,
201 struct iw_point *data, char *ssid)
203 struct wireless_dev *wdev = dev->ieee80211_ptr;
205 /* call only for station! */
206 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
207 return -EINVAL;
209 data->flags = 0;
211 wdev_lock(wdev);
212 if (wdev->current_bss) {
213 const u8 *ie;
215 rcu_read_lock();
216 ie = ieee80211_bss_get_ie(&wdev->current_bss->pub,
217 WLAN_EID_SSID);
218 if (ie) {
219 data->flags = 1;
220 data->length = ie[1];
221 memcpy(ssid, ie + 2, data->length);
223 rcu_read_unlock();
224 } else if (wdev->wext.connect.ssid && wdev->wext.connect.ssid_len) {
225 data->flags = 1;
226 data->length = wdev->wext.connect.ssid_len;
227 memcpy(ssid, wdev->wext.connect.ssid, data->length);
229 wdev_unlock(wdev);
231 return 0;
234 int cfg80211_mgd_wext_siwap(struct net_device *dev,
235 struct iw_request_info *info,
236 struct sockaddr *ap_addr, char *extra)
238 struct wireless_dev *wdev = dev->ieee80211_ptr;
239 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
240 u8 *bssid = ap_addr->sa_data;
241 int err;
243 /* call only for station! */
244 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
245 return -EINVAL;
247 if (ap_addr->sa_family != ARPHRD_ETHER)
248 return -EINVAL;
250 /* automatic mode */
251 if (is_zero_ether_addr(bssid) || is_broadcast_ether_addr(bssid))
252 bssid = NULL;
254 wdev_lock(wdev);
256 if (wdev->conn) {
257 err = 0;
258 /* both automatic */
259 if (!bssid && !wdev->wext.connect.bssid)
260 goto out;
262 /* fixed already - and no change */
263 if (wdev->wext.connect.bssid && bssid &&
264 ether_addr_equal(bssid, wdev->wext.connect.bssid))
265 goto out;
267 err = cfg80211_disconnect(rdev, dev,
268 WLAN_REASON_DEAUTH_LEAVING, false);
269 if (err)
270 goto out;
273 if (bssid) {
274 memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
275 wdev->wext.connect.bssid = wdev->wext.bssid;
276 } else
277 wdev->wext.connect.bssid = NULL;
279 err = cfg80211_mgd_wext_connect(rdev, wdev);
280 out:
281 wdev_unlock(wdev);
282 return err;
285 int cfg80211_mgd_wext_giwap(struct net_device *dev,
286 struct iw_request_info *info,
287 struct sockaddr *ap_addr, char *extra)
289 struct wireless_dev *wdev = dev->ieee80211_ptr;
291 /* call only for station! */
292 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
293 return -EINVAL;
295 ap_addr->sa_family = ARPHRD_ETHER;
297 wdev_lock(wdev);
298 if (wdev->current_bss)
299 memcpy(ap_addr->sa_data, wdev->current_bss->pub.bssid, ETH_ALEN);
300 else
301 eth_zero_addr(ap_addr->sa_data);
302 wdev_unlock(wdev);
304 return 0;
307 int cfg80211_wext_siwgenie(struct net_device *dev,
308 struct iw_request_info *info,
309 struct iw_point *data, char *extra)
311 struct wireless_dev *wdev = dev->ieee80211_ptr;
312 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
313 u8 *ie = extra;
314 int ie_len = data->length, err;
316 if (wdev->iftype != NL80211_IFTYPE_STATION)
317 return -EOPNOTSUPP;
319 if (!ie_len)
320 ie = NULL;
322 wdev_lock(wdev);
324 /* no change */
325 err = 0;
326 if (wdev->wext.ie_len == ie_len &&
327 memcmp(wdev->wext.ie, ie, ie_len) == 0)
328 goto out;
330 if (ie_len) {
331 ie = kmemdup(extra, ie_len, GFP_KERNEL);
332 if (!ie) {
333 err = -ENOMEM;
334 goto out;
336 } else
337 ie = NULL;
339 kfree(wdev->wext.ie);
340 wdev->wext.ie = ie;
341 wdev->wext.ie_len = ie_len;
343 if (wdev->conn) {
344 err = cfg80211_disconnect(rdev, dev,
345 WLAN_REASON_DEAUTH_LEAVING, false);
346 if (err)
347 goto out;
350 /* userspace better not think we'll reconnect */
351 err = 0;
352 out:
353 wdev_unlock(wdev);
354 return err;
357 int cfg80211_wext_siwmlme(struct net_device *dev,
358 struct iw_request_info *info,
359 struct iw_point *data, char *extra)
361 struct wireless_dev *wdev = dev->ieee80211_ptr;
362 struct iw_mlme *mlme = (struct iw_mlme *)extra;
363 struct cfg80211_registered_device *rdev;
364 int err;
366 if (!wdev)
367 return -EOPNOTSUPP;
369 rdev = wiphy_to_rdev(wdev->wiphy);
371 if (wdev->iftype != NL80211_IFTYPE_STATION)
372 return -EINVAL;
374 if (mlme->addr.sa_family != ARPHRD_ETHER)
375 return -EINVAL;
377 wdev_lock(wdev);
378 switch (mlme->cmd) {
379 case IW_MLME_DEAUTH:
380 case IW_MLME_DISASSOC:
381 err = cfg80211_disconnect(rdev, dev, mlme->reason_code, true);
382 break;
383 default:
384 err = -EOPNOTSUPP;
385 break;
387 wdev_unlock(wdev);
389 return err;