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 * Copyright (C) 2022 Intel Corporation
8 * Author: Rostislav Lisovy <rostislav.lisovy@fel.cvut.cz>
9 * Funded by: Volkswagen Group Research
10 */
11
12 #include <linux/ieee80211.h>
13 #include <net/cfg80211.h>
14 #include "nl80211.h"
15 #include "core.h"
16 #include "rdev-ops.h"
17
__cfg80211_join_ocb(struct cfg80211_registered_device * rdev,struct net_device * dev,struct ocb_setup * setup)18 int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
19 struct net_device *dev,
20 struct ocb_setup *setup)
21 {
22 struct wireless_dev *wdev = dev->ieee80211_ptr;
23 int err;
24
25 ASSERT_WDEV_LOCK(wdev);
26
27 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_OCB)
28 return -EOPNOTSUPP;
29
30 if (!rdev->ops->join_ocb)
31 return -EOPNOTSUPP;
32
33 if (WARN_ON(!setup->chandef.chan))
34 return -EINVAL;
35
36 err = rdev_join_ocb(rdev, dev, setup);
37 if (!err)
38 wdev->u.ocb.chandef = setup->chandef;
39
40 return err;
41 }
42
cfg80211_join_ocb(struct cfg80211_registered_device * rdev,struct net_device * dev,struct ocb_setup * setup)43 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
44 struct net_device *dev,
45 struct ocb_setup *setup)
46 {
47 struct wireless_dev *wdev = dev->ieee80211_ptr;
48 int err;
49
50 wdev_lock(wdev);
51 err = __cfg80211_join_ocb(rdev, dev, setup);
52 wdev_unlock(wdev);
53
54 return err;
55 }
56
__cfg80211_leave_ocb(struct cfg80211_registered_device * rdev,struct net_device * dev)57 int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
58 struct net_device *dev)
59 {
60 struct wireless_dev *wdev = dev->ieee80211_ptr;
61 int err;
62
63 ASSERT_WDEV_LOCK(wdev);
64
65 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_OCB)
66 return -EOPNOTSUPP;
67
68 if (!rdev->ops->leave_ocb)
69 return -EOPNOTSUPP;
70
71 if (!wdev->u.ocb.chandef.chan)
72 return -ENOTCONN;
73
74 err = rdev_leave_ocb(rdev, dev);
75 if (!err)
76 memset(&wdev->u.ocb.chandef, 0, sizeof(wdev->u.ocb.chandef));
77
78 return err;
79 }
80
cfg80211_leave_ocb(struct cfg80211_registered_device * rdev,struct net_device * dev)81 int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
82 struct net_device *dev)
83 {
84 struct wireless_dev *wdev = dev->ieee80211_ptr;
85 int err;
86
87 wdev_lock(wdev);
88 err = __cfg80211_leave_ocb(rdev, dev);
89 wdev_unlock(wdev);
90
91 return err;
92 }
93