ARM: tegra: dvfs: Removed rail dfll mode thermal trips
[linux-3.10.git] / net / wireless / wext-sme.c
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/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"
16
17 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
18                               struct wireless_dev *wdev)
19 {
20         struct cfg80211_cached_keys *ck = NULL;
21         const u8 *prev_bssid = NULL;
22         int err, i;
23
24         ASSERT_RDEV_LOCK(rdev);
25         ASSERT_WDEV_LOCK(wdev);
26
27         if (!netif_running(wdev->netdev))
28                 return 0;
29
30         wdev->wext.connect.ie = wdev->wext.ie;
31         wdev->wext.connect.ie_len = wdev->wext.ie_len;
32
33         /* Use default background scan period */
34         wdev->wext.connect.bg_scan_period = -1;
35
36         if (wdev->wext.keys) {
37                 wdev->wext.keys->def = wdev->wext.default_key;
38                 wdev->wext.keys->defmgmt = wdev->wext.default_mgmt_key;
39                 if (wdev->wext.default_key != -1)
40                         wdev->wext.connect.privacy = true;
41         }
42
43         if (!wdev->wext.connect.ssid_len)
44                 return 0;
45
46         if (wdev->wext.keys) {
47                 ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL);
48                 if (!ck)
49                         return -ENOMEM;
50                 for (i = 0; i < 6; i++)
51                         ck->params[i].key = ck->data[i];
52         }
53
54         if (wdev->wext.prev_bssid_valid)
55                 prev_bssid = wdev->wext.prev_bssid;
56
57         err = __cfg80211_connect(rdev, wdev->netdev,
58                                  &wdev->wext.connect, ck, prev_bssid);
59         if (err)
60                 kfree(ck);
61
62         return err;
63 }
64
65 int cfg80211_mgd_wext_siwfreq(struct net_device *dev,
66                               struct iw_request_info *info,
67                               struct iw_freq *wextfreq, char *extra)
68 {
69         struct wireless_dev *wdev = dev->ieee80211_ptr;
70         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
71         struct ieee80211_channel *chan = NULL;
72         int err, freq;
73
74         /* call only for station! */
75         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
76                 return -EINVAL;
77
78         freq = cfg80211_wext_freq(wdev->wiphy, wextfreq);
79         if (freq < 0)
80                 return freq;
81
82         if (freq) {
83                 chan = ieee80211_get_channel(wdev->wiphy, freq);
84                 if (!chan)
85                         return -EINVAL;
86                 if (chan->flags & IEEE80211_CHAN_DISABLED)
87                         return -EINVAL;
88         }
89
90         cfg80211_lock_rdev(rdev);
91         mutex_lock(&rdev->devlist_mtx);
92         mutex_lock(&rdev->sched_scan_mtx);
93         wdev_lock(wdev);
94
95         if (wdev->sme_state != CFG80211_SME_IDLE) {
96                 bool event = true;
97
98                 if (wdev->wext.connect.channel == chan) {
99                         err = 0;
100                         goto out;
101                 }
102
103                 /* if SSID set, we'll try right again, avoid event */
104                 if (wdev->wext.connect.ssid_len)
105                         event = false;
106                 err = __cfg80211_disconnect(rdev, dev,
107                                             WLAN_REASON_DEAUTH_LEAVING, event);
108                 if (err)
109                         goto out;
110         }
111
112
113         wdev->wext.connect.channel = chan;
114
115         /*
116          * SSID is not set, we just want to switch monitor channel,
117          * this is really just backward compatibility, if the SSID
118          * is set then we use the channel to select the BSS to use
119          * to connect to instead. If we were connected on another
120          * channel we disconnected above and reconnect below.
121          */
122         if (chan && !wdev->wext.connect.ssid_len) {
123                 struct cfg80211_chan_def chandef = {
124                         .width = NL80211_CHAN_WIDTH_20_NOHT,
125                         .center_freq1 = freq,
126                 };
127
128                 chandef.chan = ieee80211_get_channel(&rdev->wiphy, freq);
129                 if (chandef.chan)
130                         err = cfg80211_set_monitor_channel(rdev, &chandef);
131                 else
132                         err = -EINVAL;
133                 goto out;
134         }
135
136         err = cfg80211_mgd_wext_connect(rdev, wdev);
137  out:
138         wdev_unlock(wdev);
139         mutex_unlock(&rdev->sched_scan_mtx);
140         mutex_unlock(&rdev->devlist_mtx);
141         cfg80211_unlock_rdev(rdev);
142         return err;
143 }
144
145 int cfg80211_mgd_wext_giwfreq(struct net_device *dev,
146                               struct iw_request_info *info,
147                               struct iw_freq *freq, char *extra)
148 {
149         struct wireless_dev *wdev = dev->ieee80211_ptr;
150         struct ieee80211_channel *chan = NULL;
151
152         /* call only for station! */
153         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
154                 return -EINVAL;
155
156         wdev_lock(wdev);
157         if (wdev->current_bss)
158                 chan = wdev->current_bss->pub.channel;
159         else if (wdev->wext.connect.channel)
160                 chan = wdev->wext.connect.channel;
161         wdev_unlock(wdev);
162
163         if (chan) {
164                 freq->m = chan->center_freq;
165                 freq->e = 6;
166                 return 0;
167         }
168
169         /* no channel if not joining */
170         return -EINVAL;
171 }
172
173 int cfg80211_mgd_wext_siwessid(struct net_device *dev,
174                                struct iw_request_info *info,
175                                struct iw_point *data, char *ssid)
176 {
177         struct wireless_dev *wdev = dev->ieee80211_ptr;
178         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
179         size_t len = data->length;
180         int err;
181
182         /* call only for station! */
183         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
184                 return -EINVAL;
185
186         if (!data->flags)
187                 len = 0;
188
189         /* iwconfig uses nul termination in SSID.. */
190         if (len > 0 && ssid[len - 1] == '\0')
191                 len--;
192
193         cfg80211_lock_rdev(rdev);
194         mutex_lock(&rdev->devlist_mtx);
195         mutex_lock(&rdev->sched_scan_mtx);
196         wdev_lock(wdev);
197
198         err = 0;
199
200         if (wdev->sme_state != CFG80211_SME_IDLE) {
201                 bool event = true;
202
203                 if (wdev->wext.connect.ssid && len &&
204                     len == wdev->wext.connect.ssid_len &&
205                     memcmp(wdev->wext.connect.ssid, ssid, len) == 0)
206                         goto out;
207
208                 /* if SSID set now, we'll try to connect, avoid event */
209                 if (len)
210                         event = false;
211                 err = __cfg80211_disconnect(rdev, dev,
212                                             WLAN_REASON_DEAUTH_LEAVING, event);
213                 if (err)
214                         goto out;
215         }
216
217         wdev->wext.prev_bssid_valid = false;
218         wdev->wext.connect.ssid = wdev->wext.ssid;
219         memcpy(wdev->wext.ssid, ssid, len);
220         wdev->wext.connect.ssid_len = len;
221
222         wdev->wext.connect.crypto.control_port = false;
223         wdev->wext.connect.crypto.control_port_ethertype =
224                                         cpu_to_be16(ETH_P_PAE);
225
226         err = cfg80211_mgd_wext_connect(rdev, wdev);
227  out:
228         wdev_unlock(wdev);
229         mutex_unlock(&rdev->sched_scan_mtx);
230         mutex_unlock(&rdev->devlist_mtx);
231         cfg80211_unlock_rdev(rdev);
232         return err;
233 }
234
235 int cfg80211_mgd_wext_giwessid(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
241         /* call only for station! */
242         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
243                 return -EINVAL;
244
245         data->flags = 0;
246
247         wdev_lock(wdev);
248         if (wdev->current_bss) {
249                 const u8 *ie;
250
251                 rcu_read_lock();
252                 ie = ieee80211_bss_get_ie(&wdev->current_bss->pub,
253                                           WLAN_EID_SSID);
254                 if (ie) {
255                         data->flags = 1;
256                         data->length = ie[1];
257                         memcpy(ssid, ie + 2, data->length);
258                 }
259                 rcu_read_unlock();
260         } else if (wdev->wext.connect.ssid && wdev->wext.connect.ssid_len) {
261                 data->flags = 1;
262                 data->length = wdev->wext.connect.ssid_len;
263                 memcpy(ssid, wdev->wext.connect.ssid, data->length);
264         }
265         wdev_unlock(wdev);
266
267         return 0;
268 }
269
270 int cfg80211_mgd_wext_siwap(struct net_device *dev,
271                             struct iw_request_info *info,
272                             struct sockaddr *ap_addr, char *extra)
273 {
274         struct wireless_dev *wdev = dev->ieee80211_ptr;
275         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
276         u8 *bssid = ap_addr->sa_data;
277         int err;
278
279         /* call only for station! */
280         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
281                 return -EINVAL;
282
283         if (ap_addr->sa_family != ARPHRD_ETHER)
284                 return -EINVAL;
285
286         /* automatic mode */
287         if (is_zero_ether_addr(bssid) || is_broadcast_ether_addr(bssid))
288                 bssid = NULL;
289
290         cfg80211_lock_rdev(rdev);
291         mutex_lock(&rdev->devlist_mtx);
292         mutex_lock(&rdev->sched_scan_mtx);
293         wdev_lock(wdev);
294
295         if (wdev->sme_state != CFG80211_SME_IDLE) {
296                 err = 0;
297                 /* both automatic */
298                 if (!bssid && !wdev->wext.connect.bssid)
299                         goto out;
300
301                 /* fixed already - and no change */
302                 if (wdev->wext.connect.bssid && bssid &&
303                     ether_addr_equal(bssid, wdev->wext.connect.bssid))
304                         goto out;
305
306                 err = __cfg80211_disconnect(rdev, dev,
307                                             WLAN_REASON_DEAUTH_LEAVING, false);
308                 if (err)
309                         goto out;
310         }
311
312         if (bssid) {
313                 memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
314                 wdev->wext.connect.bssid = wdev->wext.bssid;
315         } else
316                 wdev->wext.connect.bssid = NULL;
317
318         err = cfg80211_mgd_wext_connect(rdev, wdev);
319  out:
320         wdev_unlock(wdev);
321         mutex_unlock(&rdev->sched_scan_mtx);
322         mutex_unlock(&rdev->devlist_mtx);
323         cfg80211_unlock_rdev(rdev);
324         return err;
325 }
326
327 int cfg80211_mgd_wext_giwap(struct net_device *dev,
328                             struct iw_request_info *info,
329                             struct sockaddr *ap_addr, char *extra)
330 {
331         struct wireless_dev *wdev = dev->ieee80211_ptr;
332
333         /* call only for station! */
334         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
335                 return -EINVAL;
336
337         ap_addr->sa_family = ARPHRD_ETHER;
338
339         wdev_lock(wdev);
340         if (wdev->current_bss)
341                 memcpy(ap_addr->sa_data, wdev->current_bss->pub.bssid, ETH_ALEN);
342         else
343                 memset(ap_addr->sa_data, 0, ETH_ALEN);
344         wdev_unlock(wdev);
345
346         return 0;
347 }
348
349 int cfg80211_wext_siwgenie(struct net_device *dev,
350                            struct iw_request_info *info,
351                            struct iw_point *data, char *extra)
352 {
353         struct wireless_dev *wdev = dev->ieee80211_ptr;
354         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
355         u8 *ie = extra;
356         int ie_len = data->length, err;
357
358         if (wdev->iftype != NL80211_IFTYPE_STATION)
359                 return -EOPNOTSUPP;
360
361         if (!ie_len)
362                 ie = NULL;
363
364         wdev_lock(wdev);
365
366         /* no change */
367         err = 0;
368         if (wdev->wext.ie_len == ie_len &&
369             memcmp(wdev->wext.ie, ie, ie_len) == 0)
370                 goto out;
371
372         if (ie_len) {
373                 ie = kmemdup(extra, ie_len, GFP_KERNEL);
374                 if (!ie) {
375                         err = -ENOMEM;
376                         goto out;
377                 }
378         } else
379                 ie = NULL;
380
381         kfree(wdev->wext.ie);
382         wdev->wext.ie = ie;
383         wdev->wext.ie_len = ie_len;
384
385         if (wdev->sme_state != CFG80211_SME_IDLE) {
386                 err = __cfg80211_disconnect(rdev, dev,
387                                             WLAN_REASON_DEAUTH_LEAVING, false);
388                 if (err)
389                         goto out;
390         }
391
392         /* userspace better not think we'll reconnect */
393         err = 0;
394  out:
395         wdev_unlock(wdev);
396         return err;
397 }
398
399 int cfg80211_wext_siwmlme(struct net_device *dev,
400                           struct iw_request_info *info,
401                           struct iw_point *data, char *extra)
402 {
403         struct wireless_dev *wdev = dev->ieee80211_ptr;
404         struct iw_mlme *mlme = (struct iw_mlme *)extra;
405         struct cfg80211_registered_device *rdev;
406         int err;
407
408         if (!wdev)
409                 return -EOPNOTSUPP;
410
411         rdev = wiphy_to_dev(wdev->wiphy);
412
413         if (wdev->iftype != NL80211_IFTYPE_STATION)
414                 return -EINVAL;
415
416         if (mlme->addr.sa_family != ARPHRD_ETHER)
417                 return -EINVAL;
418
419         wdev_lock(wdev);
420         switch (mlme->cmd) {
421         case IW_MLME_DEAUTH:
422         case IW_MLME_DISASSOC:
423                 err = __cfg80211_disconnect(rdev, dev, mlme->reason_code,
424                                             true);
425                 break;
426         default:
427                 err = -EOPNOTSUPP;
428                 break;
429         }
430         wdev_unlock(wdev);
431
432         return err;
433 }