net/wireless/ocb.c

   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
  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
  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
  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
  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 }