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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
f2129354 JB |
2 | /* |
3 | * cfg80211 wext compat for managed mode. | |
4 | * | |
5 | * Copyright 2009 Johannes Berg <johannes@sipsolutions.net> | |
6 | * Copyright (C) 2009 Intel Corporation. All rights reserved. | |
7 | */ | |
8 | ||
bc3b2d7f | 9 | #include <linux/export.h> |
f2129354 JB |
10 | #include <linux/etherdevice.h> |
11 | #include <linux/if_arp.h> | |
5a0e3ad6 | 12 | #include <linux/slab.h> |
f2129354 | 13 | #include <net/cfg80211.h> |
262eb9b2 | 14 | #include <net/cfg80211-wext.h> |
0e82ffe3 | 15 | #include "wext-compat.h" |
f2129354 JB |
16 | #include "nl80211.h" |
17 | ||
fffd0934 JB |
18 | int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, |
19 | struct wireless_dev *wdev) | |
f2129354 | 20 | { |
fffd0934 | 21 | struct cfg80211_cached_keys *ck = NULL; |
f401a6f7 | 22 | const u8 *prev_bssid = NULL; |
fffd0934 | 23 | int err, i; |
f2129354 | 24 | |
73fb08e2 | 25 | ASSERT_RTNL(); |
667503dd JB |
26 | ASSERT_WDEV_LOCK(wdev); |
27 | ||
f2129354 JB |
28 | if (!netif_running(wdev->netdev)) |
29 | return 0; | |
30 | ||
31 | wdev->wext.connect.ie = wdev->wext.ie; | |
32 | wdev->wext.connect.ie_len = wdev->wext.ie_len; | |
f2129354 | 33 | |
4486ea98 BS |
34 | /* Use default background scan period */ |
35 | wdev->wext.connect.bg_scan_period = -1; | |
36 | ||
fffd0934 JB |
37 | if (wdev->wext.keys) { |
38 | wdev->wext.keys->def = wdev->wext.default_key; | |
4be3bd8c JB |
39 | if (wdev->wext.default_key != -1) |
40 | wdev->wext.connect.privacy = true; | |
fffd0934 JB |
41 | } |
42 | ||
43 | if (!wdev->wext.connect.ssid_len) | |
44 | return 0; | |
45 | ||
f1c1f17a | 46 | if (wdev->wext.keys && wdev->wext.keys->def != -1) { |
fffd0934 JB |
47 | ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL); |
48 | if (!ck) | |
49 | return -ENOMEM; | |
b8676221 | 50 | for (i = 0; i < CFG80211_MAX_WEP_KEYS; i++) |
fffd0934 JB |
51 | ck->params[i].key = ck->data[i]; |
52 | } | |
f401a6f7 JB |
53 | |
54 | if (wdev->wext.prev_bssid_valid) | |
55 | prev_bssid = wdev->wext.prev_bssid; | |
56 | ||
83739b03 JB |
57 | err = cfg80211_connect(rdev, wdev->netdev, |
58 | &wdev->wext.connect, ck, prev_bssid); | |
fffd0934 | 59 | if (err) |
b47f610b | 60 | kzfree(ck); |
f2129354 JB |
61 | |
62 | return err; | |
63 | } | |
64 | ||
65 | int cfg80211_mgd_wext_siwfreq(struct net_device *dev, | |
66 | struct iw_request_info *info, | |
59bbb6f7 | 67 | struct iw_freq *wextfreq, char *extra) |
f2129354 JB |
68 | { |
69 | struct wireless_dev *wdev = dev->ieee80211_ptr; | |
f26cbf40 | 70 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); |
59bbb6f7 JB |
71 | struct ieee80211_channel *chan = NULL; |
72 | int err, freq; | |
f2129354 JB |
73 | |
74 | /* call only for station! */ | |
75 | if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION)) | |
76 | return -EINVAL; | |
77 | ||
96998e3a | 78 | freq = cfg80211_wext_freq(wextfreq); |
59bbb6f7 JB |
79 | if (freq < 0) |
80 | return freq; | |
f2129354 | 81 | |
59bbb6f7 JB |
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 | } | |
f2129354 | 89 | |
667503dd JB |
90 | wdev_lock(wdev); |
91 | ||
ceca7b71 | 92 | if (wdev->conn) { |
f2129354 | 93 | bool event = true; |
25e83c49 JB |
94 | |
95 | if (wdev->wext.connect.channel == chan) { | |
96 | err = 0; | |
97 | goto out; | |
98 | } | |
99 | ||
f2129354 JB |
100 | /* if SSID set, we'll try right again, avoid event */ |
101 | if (wdev->wext.connect.ssid_len) | |
102 | event = false; | |
83739b03 JB |
103 | err = cfg80211_disconnect(rdev, dev, |
104 | WLAN_REASON_DEAUTH_LEAVING, event); | |
f2129354 | 105 | if (err) |
667503dd | 106 | goto out; |
f2129354 JB |
107 | } |
108 | ||
109 | wdev->wext.connect.channel = chan; | |
59bbb6f7 | 110 | err = cfg80211_mgd_wext_connect(rdev, wdev); |
667503dd JB |
111 | out: |
112 | wdev_unlock(wdev); | |
667503dd | 113 | return err; |
f2129354 | 114 | } |
f2129354 JB |
115 | |
116 | int cfg80211_mgd_wext_giwfreq(struct net_device *dev, | |
117 | struct iw_request_info *info, | |
118 | struct iw_freq *freq, char *extra) | |
119 | { | |
120 | struct wireless_dev *wdev = dev->ieee80211_ptr; | |
121 | struct ieee80211_channel *chan = NULL; | |
122 | ||
123 | /* call only for station! */ | |
124 | if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION)) | |
125 | return -EINVAL; | |
126 | ||
667503dd | 127 | wdev_lock(wdev); |
f2129354 | 128 | if (wdev->current_bss) |
19957bb3 | 129 | chan = wdev->current_bss->pub.channel; |
f2129354 JB |
130 | else if (wdev->wext.connect.channel) |
131 | chan = wdev->wext.connect.channel; | |
667503dd | 132 | wdev_unlock(wdev); |
f2129354 JB |
133 | |
134 | if (chan) { | |
135 | freq->m = chan->center_freq; | |
136 | freq->e = 6; | |
137 | return 0; | |
138 | } | |
139 | ||
140 | /* no channel if not joining */ | |
141 | return -EINVAL; | |
142 | } | |
f2129354 JB |
143 | |
144 | int cfg80211_mgd_wext_siwessid(struct net_device *dev, | |
145 | struct iw_request_info *info, | |
146 | struct iw_point *data, char *ssid) | |
147 | { | |
148 | struct wireless_dev *wdev = dev->ieee80211_ptr; | |
f26cbf40 | 149 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); |
f2129354 JB |
150 | size_t len = data->length; |
151 | int err; | |
152 | ||
153 | /* call only for station! */ | |
154 | if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION)) | |
155 | return -EINVAL; | |
156 | ||
157 | if (!data->flags) | |
158 | len = 0; | |
159 | ||
160 | /* iwconfig uses nul termination in SSID.. */ | |
161 | if (len > 0 && ssid[len - 1] == '\0') | |
162 | len--; | |
163 | ||
667503dd JB |
164 | wdev_lock(wdev); |
165 | ||
166 | err = 0; | |
167 | ||
ceca7b71 | 168 | if (wdev->conn) { |
f2129354 | 169 | bool event = true; |
25e83c49 JB |
170 | |
171 | if (wdev->wext.connect.ssid && len && | |
172 | len == wdev->wext.connect.ssid_len && | |
173 | memcmp(wdev->wext.connect.ssid, ssid, len) == 0) | |
174 | goto out; | |
175 | ||
f2129354 JB |
176 | /* if SSID set now, we'll try to connect, avoid event */ |
177 | if (len) | |
178 | event = false; | |
83739b03 JB |
179 | err = cfg80211_disconnect(rdev, dev, |
180 | WLAN_REASON_DEAUTH_LEAVING, event); | |
f2129354 | 181 | if (err) |
667503dd | 182 | goto out; |
f2129354 JB |
183 | } |
184 | ||
f401a6f7 | 185 | wdev->wext.prev_bssid_valid = false; |
f2129354 JB |
186 | wdev->wext.connect.ssid = wdev->wext.ssid; |
187 | memcpy(wdev->wext.ssid, ssid, len); | |
188 | wdev->wext.connect.ssid_len = len; | |
189 | ||
190 | wdev->wext.connect.crypto.control_port = false; | |
c0692b8f JB |
191 | wdev->wext.connect.crypto.control_port_ethertype = |
192 | cpu_to_be16(ETH_P_PAE); | |
f2129354 | 193 | |
59bbb6f7 | 194 | err = cfg80211_mgd_wext_connect(rdev, wdev); |
667503dd JB |
195 | out: |
196 | wdev_unlock(wdev); | |
667503dd | 197 | return err; |
f2129354 | 198 | } |
f2129354 JB |
199 | |
200 | int cfg80211_mgd_wext_giwessid(struct net_device *dev, | |
201 | struct iw_request_info *info, | |
202 | struct iw_point *data, char *ssid) | |
203 | { | |
204 | struct wireless_dev *wdev = dev->ieee80211_ptr; | |
205 | ||
206 | /* call only for station! */ | |
207 | if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION)) | |
208 | return -EINVAL; | |
209 | ||
210 | data->flags = 0; | |
211 | ||
667503dd | 212 | wdev_lock(wdev); |
a42dd7ef | 213 | if (wdev->current_bss) { |
9caf0364 JB |
214 | const u8 *ie; |
215 | ||
216 | rcu_read_lock(); | |
217 | ie = ieee80211_bss_get_ie(&wdev->current_bss->pub, | |
218 | WLAN_EID_SSID); | |
a42dd7ef ZY |
219 | if (ie) { |
220 | data->flags = 1; | |
221 | data->length = ie[1]; | |
222 | memcpy(ssid, ie + 2, data->length); | |
223 | } | |
9caf0364 | 224 | rcu_read_unlock(); |
a42dd7ef | 225 | } else if (wdev->wext.connect.ssid && wdev->wext.connect.ssid_len) { |
f2129354 JB |
226 | data->flags = 1; |
227 | data->length = wdev->wext.connect.ssid_len; | |
228 | memcpy(ssid, wdev->wext.connect.ssid, data->length); | |
33de4f9d | 229 | } |
667503dd | 230 | wdev_unlock(wdev); |
f2129354 JB |
231 | |
232 | return 0; | |
233 | } | |
f2129354 JB |
234 | |
235 | int cfg80211_mgd_wext_siwap(struct net_device *dev, | |
236 | struct iw_request_info *info, | |
237 | struct sockaddr *ap_addr, char *extra) | |
238 | { | |
239 | struct wireless_dev *wdev = dev->ieee80211_ptr; | |
f26cbf40 | 240 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); |
f2129354 JB |
241 | u8 *bssid = ap_addr->sa_data; |
242 | int err; | |
243 | ||
244 | /* call only for station! */ | |
245 | if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION)) | |
246 | return -EINVAL; | |
247 | ||
248 | if (ap_addr->sa_family != ARPHRD_ETHER) | |
249 | return -EINVAL; | |
250 | ||
251 | /* automatic mode */ | |
252 | if (is_zero_ether_addr(bssid) || is_broadcast_ether_addr(bssid)) | |
253 | bssid = NULL; | |
254 | ||
667503dd JB |
255 | wdev_lock(wdev); |
256 | ||
ceca7b71 | 257 | if (wdev->conn) { |
25e83c49 JB |
258 | err = 0; |
259 | /* both automatic */ | |
260 | if (!bssid && !wdev->wext.connect.bssid) | |
261 | goto out; | |
f2129354 | 262 | |
25e83c49 JB |
263 | /* fixed already - and no change */ |
264 | if (wdev->wext.connect.bssid && bssid && | |
ac422d3c | 265 | ether_addr_equal(bssid, wdev->wext.connect.bssid)) |
25e83c49 | 266 | goto out; |
f2129354 | 267 | |
83739b03 JB |
268 | err = cfg80211_disconnect(rdev, dev, |
269 | WLAN_REASON_DEAUTH_LEAVING, false); | |
f2129354 | 270 | if (err) |
667503dd | 271 | goto out; |
f2129354 JB |
272 | } |
273 | ||
274 | if (bssid) { | |
275 | memcpy(wdev->wext.bssid, bssid, ETH_ALEN); | |
276 | wdev->wext.connect.bssid = wdev->wext.bssid; | |
277 | } else | |
278 | wdev->wext.connect.bssid = NULL; | |
279 | ||
59bbb6f7 | 280 | err = cfg80211_mgd_wext_connect(rdev, wdev); |
667503dd JB |
281 | out: |
282 | wdev_unlock(wdev); | |
667503dd | 283 | return err; |
f2129354 | 284 | } |
f2129354 JB |
285 | |
286 | int cfg80211_mgd_wext_giwap(struct net_device *dev, | |
287 | struct iw_request_info *info, | |
288 | struct sockaddr *ap_addr, char *extra) | |
289 | { | |
290 | struct wireless_dev *wdev = dev->ieee80211_ptr; | |
291 | ||
292 | /* call only for station! */ | |
293 | if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION)) | |
294 | return -EINVAL; | |
295 | ||
296 | ap_addr->sa_family = ARPHRD_ETHER; | |
297 | ||
667503dd | 298 | wdev_lock(wdev); |
f2129354 | 299 | if (wdev->current_bss) |
19957bb3 | 300 | memcpy(ap_addr->sa_data, wdev->current_bss->pub.bssid, ETH_ALEN); |
f2129354 | 301 | else |
d2beae10 | 302 | eth_zero_addr(ap_addr->sa_data); |
667503dd | 303 | wdev_unlock(wdev); |
f2129354 JB |
304 | |
305 | return 0; | |
306 | } | |
f2129354 JB |
307 | |
308 | int cfg80211_wext_siwgenie(struct net_device *dev, | |
309 | struct iw_request_info *info, | |
310 | struct iw_point *data, char *extra) | |
311 | { | |
312 | struct wireless_dev *wdev = dev->ieee80211_ptr; | |
f26cbf40 | 313 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); |
f2129354 JB |
314 | u8 *ie = extra; |
315 | int ie_len = data->length, err; | |
316 | ||
317 | if (wdev->iftype != NL80211_IFTYPE_STATION) | |
318 | return -EOPNOTSUPP; | |
319 | ||
320 | if (!ie_len) | |
321 | ie = NULL; | |
322 | ||
667503dd JB |
323 | wdev_lock(wdev); |
324 | ||
f2129354 | 325 | /* no change */ |
667503dd | 326 | err = 0; |
f2129354 JB |
327 | if (wdev->wext.ie_len == ie_len && |
328 | memcmp(wdev->wext.ie, ie, ie_len) == 0) | |
667503dd | 329 | goto out; |
f2129354 JB |
330 | |
331 | if (ie_len) { | |
332 | ie = kmemdup(extra, ie_len, GFP_KERNEL); | |
667503dd JB |
333 | if (!ie) { |
334 | err = -ENOMEM; | |
335 | goto out; | |
336 | } | |
f2129354 JB |
337 | } else |
338 | ie = NULL; | |
339 | ||
340 | kfree(wdev->wext.ie); | |
341 | wdev->wext.ie = ie; | |
342 | wdev->wext.ie_len = ie_len; | |
343 | ||
ceca7b71 | 344 | if (wdev->conn) { |
83739b03 JB |
345 | err = cfg80211_disconnect(rdev, dev, |
346 | WLAN_REASON_DEAUTH_LEAVING, false); | |
f2129354 | 347 | if (err) |
667503dd | 348 | goto out; |
f2129354 JB |
349 | } |
350 | ||
351 | /* userspace better not think we'll reconnect */ | |
667503dd JB |
352 | err = 0; |
353 | out: | |
354 | wdev_unlock(wdev); | |
355 | return err; | |
f2129354 | 356 | } |
f2129354 JB |
357 | |
358 | int cfg80211_wext_siwmlme(struct net_device *dev, | |
359 | struct iw_request_info *info, | |
360 | struct iw_point *data, char *extra) | |
361 | { | |
362 | struct wireless_dev *wdev = dev->ieee80211_ptr; | |
363 | struct iw_mlme *mlme = (struct iw_mlme *)extra; | |
364 | struct cfg80211_registered_device *rdev; | |
667503dd | 365 | int err; |
f2129354 JB |
366 | |
367 | if (!wdev) | |
368 | return -EOPNOTSUPP; | |
369 | ||
f26cbf40 | 370 | rdev = wiphy_to_rdev(wdev->wiphy); |
f2129354 JB |
371 | |
372 | if (wdev->iftype != NL80211_IFTYPE_STATION) | |
373 | return -EINVAL; | |
374 | ||
375 | if (mlme->addr.sa_family != ARPHRD_ETHER) | |
376 | return -EINVAL; | |
377 | ||
667503dd | 378 | wdev_lock(wdev); |
f2129354 JB |
379 | switch (mlme->cmd) { |
380 | case IW_MLME_DEAUTH: | |
381 | case IW_MLME_DISASSOC: | |
83739b03 | 382 | err = cfg80211_disconnect(rdev, dev, mlme->reason_code, true); |
667503dd | 383 | break; |
f2129354 | 384 | default: |
667503dd JB |
385 | err = -EOPNOTSUPP; |
386 | break; | |
f2129354 | 387 | } |
667503dd JB |
388 | wdev_unlock(wdev); |
389 | ||
390 | return err; | |
f2129354 | 391 | } |