1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * OCB mode implementation
4  *
5  * Copyright: (c) 2014 Czech Technical University in Prague
6  *            (c) 2014 Volkswagen Group Research
7  * Author:    Rostislav Lisovy <rostislav.lisovy@fel.cvut.cz>
8  * Funded by: Volkswagen Group Research
9  */
10 
11 #include <linux/ieee80211.h>
12 #include <net/cfg80211.h>
13 #include "nl80211.h"
14 #include "core.h"
15 #include "rdev-ops.h"
16 
__cfg80211_join_ocb(struct cfg80211_registered_device * rdev,struct net_device * dev,struct ocb_setup * setup)17 int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
18 			struct net_device *dev,
19 			struct ocb_setup *setup)
20 {
21 	struct wireless_dev *wdev = dev->ieee80211_ptr;
22 	int err;
23 
24 	ASSERT_WDEV_LOCK(wdev);
25 
26 	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_OCB)
27 		return -EOPNOTSUPP;
28 
29 	if (!rdev->ops->join_ocb)
30 		return -EOPNOTSUPP;
31 
32 	if (WARN_ON(!setup->chandef.chan))
33 		return -EINVAL;
34 
35 	err = rdev_join_ocb(rdev, dev, setup);
36 	if (!err)
37 		wdev->chandef = setup->chandef;
38 
39 	return err;
40 }
41 
cfg80211_join_ocb(struct cfg80211_registered_device * rdev,struct net_device * dev,struct ocb_setup * setup)42 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
43 		      struct net_device *dev,
44 		      struct ocb_setup *setup)
45 {
46 	struct wireless_dev *wdev = dev->ieee80211_ptr;
47 	int err;
48 
49 	wdev_lock(wdev);
50 	err = __cfg80211_join_ocb(rdev, dev, setup);
51 	wdev_unlock(wdev);
52 
53 	return err;
54 }
55 
__cfg80211_leave_ocb(struct cfg80211_registered_device * rdev,struct net_device * dev)56 int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
57 			 struct net_device *dev)
58 {
59 	struct wireless_dev *wdev = dev->ieee80211_ptr;
60 	int err;
61 
62 	ASSERT_WDEV_LOCK(wdev);
63 
64 	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_OCB)
65 		return -EOPNOTSUPP;
66 
67 	if (!rdev->ops->leave_ocb)
68 		return -EOPNOTSUPP;
69 
70 	err = rdev_leave_ocb(rdev, dev);
71 	if (!err)
72 		memset(&wdev->chandef, 0, sizeof(wdev->chandef));
73 
74 	return err;
75 }
76 
cfg80211_leave_ocb(struct cfg80211_registered_device * rdev,struct net_device * dev)77 int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
78 		       struct net_device *dev)
79 {
80 	struct wireless_dev *wdev = dev->ieee80211_ptr;
81 	int err;
82 
83 	wdev_lock(wdev);
84 	err = __cfg80211_leave_ocb(rdev, dev);
85 	wdev_unlock(wdev);
86 
87 	return err;
88 }
89