blob: 14c9a2583ba0926a2e14a777aaa5b69fd09f8963 [file] [log] [blame]
Johannes Bergf2129352009-07-01 21:26:56 +02001/*
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
Paul Gortmakerbc3b2d72011-07-15 11:47:34 -04008#include <linux/export.h>
Johannes Bergf2129352009-07-01 21:26:56 +02009#include <linux/etherdevice.h>
10#include <linux/if_arp.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090011#include <linux/slab.h>
Johannes Bergf2129352009-07-01 21:26:56 +020012#include <net/cfg80211.h>
Johannes Berg262eb9b22011-07-13 10:39:09 +020013#include <net/cfg80211-wext.h>
Johannes Berg0e82ffe2009-07-27 12:01:50 +020014#include "wext-compat.h"
Johannes Bergf2129352009-07-01 21:26:56 +020015#include "nl80211.h"
16
Johannes Bergfffd0932009-07-08 14:22:54 +020017int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
18 struct wireless_dev *wdev)
Johannes Bergf2129352009-07-01 21:26:56 +020019{
Johannes Bergfffd0932009-07-08 14:22:54 +020020 struct cfg80211_cached_keys *ck = NULL;
Johannes Bergf401a6f2009-08-07 14:51:05 +020021 const u8 *prev_bssid = NULL;
Johannes Bergfffd0932009-07-08 14:22:54 +020022 int err, i;
Johannes Bergf2129352009-07-01 21:26:56 +020023
Johannes Berg667503dd2009-07-07 03:56:11 +020024 ASSERT_RDEV_LOCK(rdev);
25 ASSERT_WDEV_LOCK(wdev);
26
Johannes Bergf2129352009-07-01 21:26:56 +020027 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;
Johannes Bergf2129352009-07-01 21:26:56 +020032
Bala Shanmugam4486ea92012-03-07 17:27:12 +053033 /* Use default background scan period */
34 wdev->wext.connect.bg_scan_period = -1;
35
Johannes Bergfffd0932009-07-08 14:22:54 +020036 if (wdev->wext.keys) {
37 wdev->wext.keys->def = wdev->wext.default_key;
38 wdev->wext.keys->defmgmt = wdev->wext.default_mgmt_key;
Johannes Berg4be3bd82009-09-24 09:00:57 +020039 if (wdev->wext.default_key != -1)
40 wdev->wext.connect.privacy = true;
Johannes Bergfffd0932009-07-08 14:22:54 +020041 }
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 }
Johannes Bergf401a6f2009-08-07 14:51:05 +020053
54 if (wdev->wext.prev_bssid_valid)
55 prev_bssid = wdev->wext.prev_bssid;
56
Johannes Berg83739b02013-05-15 17:44:01 +020057 err = cfg80211_connect(rdev, wdev->netdev,
58 &wdev->wext.connect, ck, prev_bssid);
Johannes Bergfffd0932009-07-08 14:22:54 +020059 if (err)
60 kfree(ck);
Johannes Bergf2129352009-07-01 21:26:56 +020061
62 return err;
63}
64
65int cfg80211_mgd_wext_siwfreq(struct net_device *dev,
66 struct iw_request_info *info,
Johannes Berg59bbb6f2009-08-07 17:22:35 +020067 struct iw_freq *wextfreq, char *extra)
Johannes Bergf2129352009-07-01 21:26:56 +020068{
69 struct wireless_dev *wdev = dev->ieee80211_ptr;
70 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
Johannes Berg59bbb6f2009-08-07 17:22:35 +020071 struct ieee80211_channel *chan = NULL;
72 int err, freq;
Johannes Bergf2129352009-07-01 21:26:56 +020073
74 /* call only for station! */
75 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
76 return -EINVAL;
77
Johannes Berg59bbb6f2009-08-07 17:22:35 +020078 freq = cfg80211_wext_freq(wdev->wiphy, wextfreq);
79 if (freq < 0)
80 return freq;
Johannes Bergf2129352009-07-01 21:26:56 +020081
Johannes Berg59bbb6f2009-08-07 17:22:35 +020082 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 }
Johannes Bergf2129352009-07-01 21:26:56 +020089
Johannes Berg667503dd2009-07-07 03:56:11 +020090 wdev_lock(wdev);
91
Johannes Bergceca7b72013-05-16 00:55:45 +020092 if (wdev->conn) {
Johannes Bergf2129352009-07-01 21:26:56 +020093 bool event = true;
Johannes Berg25e83c42009-07-16 11:39:04 +020094
95 if (wdev->wext.connect.channel == chan) {
96 err = 0;
97 goto out;
98 }
99
Johannes Bergf2129352009-07-01 21:26:56 +0200100 /* if SSID set, we'll try right again, avoid event */
101 if (wdev->wext.connect.ssid_len)
102 event = false;
Johannes Berg83739b02013-05-15 17:44:01 +0200103 err = cfg80211_disconnect(rdev, dev,
104 WLAN_REASON_DEAUTH_LEAVING, event);
Johannes Bergf2129352009-07-01 21:26:56 +0200105 if (err)
Johannes Berg667503dd2009-07-07 03:56:11 +0200106 goto out;
Johannes Bergf2129352009-07-01 21:26:56 +0200107 }
108
Johannes Berg667503dd2009-07-07 03:56:11 +0200109
Johannes Bergf2129352009-07-01 21:26:56 +0200110 wdev->wext.connect.channel = chan;
111
Johannes Berge8c9bd52012-06-06 08:18:22 +0200112 /*
113 * SSID is not set, we just want to switch monitor channel,
114 * this is really just backward compatibility, if the SSID
115 * is set then we use the channel to select the BSS to use
116 * to connect to instead. If we were connected on another
117 * channel we disconnected above and reconnect below.
118 */
Johannes Berg59bbb6f2009-08-07 17:22:35 +0200119 if (chan && !wdev->wext.connect.ssid_len) {
Johannes Berg683b6d32012-11-08 21:25:48 +0100120 struct cfg80211_chan_def chandef = {
Johannes Berg3d9d1d62012-11-08 23:14:50 +0100121 .width = NL80211_CHAN_WIDTH_20_NOHT,
122 .center_freq1 = freq,
Johannes Berg683b6d32012-11-08 21:25:48 +0100123 };
124
125 chandef.chan = ieee80211_get_channel(&rdev->wiphy, freq);
126 if (chandef.chan)
127 err = cfg80211_set_monitor_channel(rdev, &chandef);
128 else
129 err = -EINVAL;
Johannes Berg667503dd2009-07-07 03:56:11 +0200130 goto out;
Johannes Bergf2129352009-07-01 21:26:56 +0200131 }
132
Johannes Berg59bbb6f2009-08-07 17:22:35 +0200133 err = cfg80211_mgd_wext_connect(rdev, wdev);
Johannes Berg667503dd2009-07-07 03:56:11 +0200134 out:
135 wdev_unlock(wdev);
Johannes Berg667503dd2009-07-07 03:56:11 +0200136 return err;
Johannes Bergf2129352009-07-01 21:26:56 +0200137}
Johannes Bergf2129352009-07-01 21:26:56 +0200138
139int cfg80211_mgd_wext_giwfreq(struct net_device *dev,
140 struct iw_request_info *info,
141 struct iw_freq *freq, char *extra)
142{
143 struct wireless_dev *wdev = dev->ieee80211_ptr;
144 struct ieee80211_channel *chan = NULL;
145
146 /* call only for station! */
147 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
148 return -EINVAL;
149
Johannes Berg667503dd2009-07-07 03:56:11 +0200150 wdev_lock(wdev);
Johannes Bergf2129352009-07-01 21:26:56 +0200151 if (wdev->current_bss)
Johannes Berg19957bb2009-07-02 17:20:43 +0200152 chan = wdev->current_bss->pub.channel;
Johannes Bergf2129352009-07-01 21:26:56 +0200153 else if (wdev->wext.connect.channel)
154 chan = wdev->wext.connect.channel;
Johannes Berg667503dd2009-07-07 03:56:11 +0200155 wdev_unlock(wdev);
Johannes Bergf2129352009-07-01 21:26:56 +0200156
157 if (chan) {
158 freq->m = chan->center_freq;
159 freq->e = 6;
160 return 0;
161 }
162
163 /* no channel if not joining */
164 return -EINVAL;
165}
Johannes Bergf2129352009-07-01 21:26:56 +0200166
167int cfg80211_mgd_wext_siwessid(struct net_device *dev,
168 struct iw_request_info *info,
169 struct iw_point *data, char *ssid)
170{
171 struct wireless_dev *wdev = dev->ieee80211_ptr;
Johannes Berg59bbb6f2009-08-07 17:22:35 +0200172 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
Johannes Bergf2129352009-07-01 21:26:56 +0200173 size_t len = data->length;
174 int err;
175
176 /* call only for station! */
177 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
178 return -EINVAL;
179
180 if (!data->flags)
181 len = 0;
182
183 /* iwconfig uses nul termination in SSID.. */
184 if (len > 0 && ssid[len - 1] == '\0')
185 len--;
186
Johannes Berg667503dd2009-07-07 03:56:11 +0200187 wdev_lock(wdev);
188
189 err = 0;
190
Johannes Bergceca7b72013-05-16 00:55:45 +0200191 if (wdev->conn) {
Johannes Bergf2129352009-07-01 21:26:56 +0200192 bool event = true;
Johannes Berg25e83c42009-07-16 11:39:04 +0200193
194 if (wdev->wext.connect.ssid && len &&
195 len == wdev->wext.connect.ssid_len &&
196 memcmp(wdev->wext.connect.ssid, ssid, len) == 0)
197 goto out;
198
Johannes Bergf2129352009-07-01 21:26:56 +0200199 /* if SSID set now, we'll try to connect, avoid event */
200 if (len)
201 event = false;
Johannes Berg83739b02013-05-15 17:44:01 +0200202 err = cfg80211_disconnect(rdev, dev,
203 WLAN_REASON_DEAUTH_LEAVING, event);
Johannes Bergf2129352009-07-01 21:26:56 +0200204 if (err)
Johannes Berg667503dd2009-07-07 03:56:11 +0200205 goto out;
Johannes Bergf2129352009-07-01 21:26:56 +0200206 }
207
Johannes Bergf401a6f2009-08-07 14:51:05 +0200208 wdev->wext.prev_bssid_valid = false;
Johannes Bergf2129352009-07-01 21:26:56 +0200209 wdev->wext.connect.ssid = wdev->wext.ssid;
210 memcpy(wdev->wext.ssid, ssid, len);
211 wdev->wext.connect.ssid_len = len;
212
213 wdev->wext.connect.crypto.control_port = false;
Johannes Bergc0692b82010-08-27 14:26:53 +0300214 wdev->wext.connect.crypto.control_port_ethertype =
215 cpu_to_be16(ETH_P_PAE);
Johannes Bergf2129352009-07-01 21:26:56 +0200216
Johannes Berg59bbb6f2009-08-07 17:22:35 +0200217 err = cfg80211_mgd_wext_connect(rdev, wdev);
Johannes Berg667503dd2009-07-07 03:56:11 +0200218 out:
219 wdev_unlock(wdev);
Johannes Berg667503dd2009-07-07 03:56:11 +0200220 return err;
Johannes Bergf2129352009-07-01 21:26:56 +0200221}
Johannes Bergf2129352009-07-01 21:26:56 +0200222
223int cfg80211_mgd_wext_giwessid(struct net_device *dev,
224 struct iw_request_info *info,
225 struct iw_point *data, char *ssid)
226{
227 struct wireless_dev *wdev = dev->ieee80211_ptr;
228
229 /* call only for station! */
230 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
231 return -EINVAL;
232
233 data->flags = 0;
234
Johannes Berg667503dd2009-07-07 03:56:11 +0200235 wdev_lock(wdev);
Zhu Yia42dd7ef2009-08-05 15:07:13 +0800236 if (wdev->current_bss) {
Johannes Berg9caf0362012-11-29 01:25:20 +0100237 const u8 *ie;
238
239 rcu_read_lock();
240 ie = ieee80211_bss_get_ie(&wdev->current_bss->pub,
241 WLAN_EID_SSID);
Zhu Yia42dd7ef2009-08-05 15:07:13 +0800242 if (ie) {
243 data->flags = 1;
244 data->length = ie[1];
245 memcpy(ssid, ie + 2, data->length);
246 }
Johannes Berg9caf0362012-11-29 01:25:20 +0100247 rcu_read_unlock();
Zhu Yia42dd7ef2009-08-05 15:07:13 +0800248 } else if (wdev->wext.connect.ssid && wdev->wext.connect.ssid_len) {
Johannes Bergf2129352009-07-01 21:26:56 +0200249 data->flags = 1;
250 data->length = wdev->wext.connect.ssid_len;
251 memcpy(ssid, wdev->wext.connect.ssid, data->length);
Johannes Berg33de4f92009-09-17 08:35:54 -0700252 }
Johannes Berg667503dd2009-07-07 03:56:11 +0200253 wdev_unlock(wdev);
Johannes Bergf2129352009-07-01 21:26:56 +0200254
255 return 0;
256}
Johannes Bergf2129352009-07-01 21:26:56 +0200257
258int cfg80211_mgd_wext_siwap(struct net_device *dev,
259 struct iw_request_info *info,
260 struct sockaddr *ap_addr, char *extra)
261{
262 struct wireless_dev *wdev = dev->ieee80211_ptr;
Johannes Berg59bbb6f2009-08-07 17:22:35 +0200263 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
Johannes Bergf2129352009-07-01 21:26:56 +0200264 u8 *bssid = ap_addr->sa_data;
265 int err;
266
267 /* call only for station! */
268 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
269 return -EINVAL;
270
271 if (ap_addr->sa_family != ARPHRD_ETHER)
272 return -EINVAL;
273
274 /* automatic mode */
275 if (is_zero_ether_addr(bssid) || is_broadcast_ether_addr(bssid))
276 bssid = NULL;
277
Johannes Berg667503dd2009-07-07 03:56:11 +0200278 wdev_lock(wdev);
279
Johannes Bergceca7b72013-05-16 00:55:45 +0200280 if (wdev->conn) {
Johannes Berg25e83c42009-07-16 11:39:04 +0200281 err = 0;
282 /* both automatic */
283 if (!bssid && !wdev->wext.connect.bssid)
284 goto out;
285
286 /* fixed already - and no change */
287 if (wdev->wext.connect.bssid && bssid &&
Joe Perchesac422d32012-05-08 18:56:55 +0000288 ether_addr_equal(bssid, wdev->wext.connect.bssid))
Johannes Berg25e83c42009-07-16 11:39:04 +0200289 goto out;
290
Johannes Berg83739b02013-05-15 17:44:01 +0200291 err = cfg80211_disconnect(rdev, dev,
292 WLAN_REASON_DEAUTH_LEAVING, false);
Johannes Bergf2129352009-07-01 21:26:56 +0200293 if (err)
Johannes Berg667503dd2009-07-07 03:56:11 +0200294 goto out;
Johannes Bergf2129352009-07-01 21:26:56 +0200295 }
296
297 if (bssid) {
298 memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
299 wdev->wext.connect.bssid = wdev->wext.bssid;
300 } else
301 wdev->wext.connect.bssid = NULL;
302
Johannes Berg59bbb6f2009-08-07 17:22:35 +0200303 err = cfg80211_mgd_wext_connect(rdev, wdev);
Johannes Berg667503dd2009-07-07 03:56:11 +0200304 out:
305 wdev_unlock(wdev);
Johannes Berg667503dd2009-07-07 03:56:11 +0200306 return err;
Johannes Bergf2129352009-07-01 21:26:56 +0200307}
Johannes Bergf2129352009-07-01 21:26:56 +0200308
309int cfg80211_mgd_wext_giwap(struct net_device *dev,
310 struct iw_request_info *info,
311 struct sockaddr *ap_addr, char *extra)
312{
313 struct wireless_dev *wdev = dev->ieee80211_ptr;
314
315 /* call only for station! */
316 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
317 return -EINVAL;
318
319 ap_addr->sa_family = ARPHRD_ETHER;
320
Johannes Berg667503dd2009-07-07 03:56:11 +0200321 wdev_lock(wdev);
Johannes Bergf2129352009-07-01 21:26:56 +0200322 if (wdev->current_bss)
Johannes Berg19957bb2009-07-02 17:20:43 +0200323 memcpy(ap_addr->sa_data, wdev->current_bss->pub.bssid, ETH_ALEN);
Johannes Bergf2129352009-07-01 21:26:56 +0200324 else
325 memset(ap_addr->sa_data, 0, ETH_ALEN);
Johannes Berg667503dd2009-07-07 03:56:11 +0200326 wdev_unlock(wdev);
Johannes Bergf2129352009-07-01 21:26:56 +0200327
328 return 0;
329}
Johannes Bergf2129352009-07-01 21:26:56 +0200330
331int cfg80211_wext_siwgenie(struct net_device *dev,
332 struct iw_request_info *info,
333 struct iw_point *data, char *extra)
334{
335 struct wireless_dev *wdev = dev->ieee80211_ptr;
336 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
337 u8 *ie = extra;
338 int ie_len = data->length, err;
339
340 if (wdev->iftype != NL80211_IFTYPE_STATION)
341 return -EOPNOTSUPP;
342
343 if (!ie_len)
344 ie = NULL;
345
Johannes Berg667503dd2009-07-07 03:56:11 +0200346 wdev_lock(wdev);
347
Johannes Bergf2129352009-07-01 21:26:56 +0200348 /* no change */
Johannes Berg667503dd2009-07-07 03:56:11 +0200349 err = 0;
Johannes Bergf2129352009-07-01 21:26:56 +0200350 if (wdev->wext.ie_len == ie_len &&
351 memcmp(wdev->wext.ie, ie, ie_len) == 0)
Johannes Berg667503dd2009-07-07 03:56:11 +0200352 goto out;
Johannes Bergf2129352009-07-01 21:26:56 +0200353
354 if (ie_len) {
355 ie = kmemdup(extra, ie_len, GFP_KERNEL);
Johannes Berg667503dd2009-07-07 03:56:11 +0200356 if (!ie) {
357 err = -ENOMEM;
358 goto out;
359 }
Johannes Bergf2129352009-07-01 21:26:56 +0200360 } else
361 ie = NULL;
362
363 kfree(wdev->wext.ie);
364 wdev->wext.ie = ie;
365 wdev->wext.ie_len = ie_len;
366
Johannes Bergceca7b72013-05-16 00:55:45 +0200367 if (wdev->conn) {
Johannes Berg83739b02013-05-15 17:44:01 +0200368 err = cfg80211_disconnect(rdev, dev,
369 WLAN_REASON_DEAUTH_LEAVING, false);
Johannes Bergf2129352009-07-01 21:26:56 +0200370 if (err)
Johannes Berg667503dd2009-07-07 03:56:11 +0200371 goto out;
Johannes Bergf2129352009-07-01 21:26:56 +0200372 }
373
374 /* userspace better not think we'll reconnect */
Johannes Berg667503dd2009-07-07 03:56:11 +0200375 err = 0;
376 out:
377 wdev_unlock(wdev);
378 return err;
Johannes Bergf2129352009-07-01 21:26:56 +0200379}
Johannes Bergf2129352009-07-01 21:26:56 +0200380
381int cfg80211_wext_siwmlme(struct net_device *dev,
382 struct iw_request_info *info,
383 struct iw_point *data, char *extra)
384{
385 struct wireless_dev *wdev = dev->ieee80211_ptr;
386 struct iw_mlme *mlme = (struct iw_mlme *)extra;
387 struct cfg80211_registered_device *rdev;
Johannes Berg667503dd2009-07-07 03:56:11 +0200388 int err;
Johannes Bergf2129352009-07-01 21:26:56 +0200389
390 if (!wdev)
391 return -EOPNOTSUPP;
392
393 rdev = wiphy_to_dev(wdev->wiphy);
394
395 if (wdev->iftype != NL80211_IFTYPE_STATION)
396 return -EINVAL;
397
398 if (mlme->addr.sa_family != ARPHRD_ETHER)
399 return -EINVAL;
400
Johannes Berg667503dd2009-07-07 03:56:11 +0200401 wdev_lock(wdev);
Johannes Bergf2129352009-07-01 21:26:56 +0200402 switch (mlme->cmd) {
403 case IW_MLME_DEAUTH:
404 case IW_MLME_DISASSOC:
Johannes Berg83739b02013-05-15 17:44:01 +0200405 err = cfg80211_disconnect(rdev, dev, mlme->reason_code, true);
Johannes Berg667503dd2009-07-07 03:56:11 +0200406 break;
Johannes Bergf2129352009-07-01 21:26:56 +0200407 default:
Johannes Berg667503dd2009-07-07 03:56:11 +0200408 err = -EOPNOTSUPP;
409 break;
Johannes Bergf2129352009-07-01 21:26:56 +0200410 }
Johannes Berg667503dd2009-07-07 03:56:11 +0200411 wdev_unlock(wdev);
412
413 return err;
Johannes Bergf2129352009-07-01 21:26:56 +0200414}