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 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 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 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 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