net/wireless/ocb.c

   1 /*
   2  * OCB mode implementation
   3  *
   4  * Copyright: (c) 2014 Czech Technical University in Prague
   5  *            (c) 2014 Volkswagen Group Research
   6  * Author:    Rostislav Lisovy <rostislav.lisovy@fel.cvut.cz>
   7  * Funded by: Volkswagen Group Research
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #include <linux/ieee80211.h>
  15 #include <net/cfg80211.h>
  16 #include "nl80211.h"
  17 #include "core.h"
  18 #include "rdev-ops.h"
  19
  20 int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
  21                         struct net_device *dev,
  22                         struct ocb_setup *setup)
  23 {
  24         struct wireless_dev *wdev = dev->ieee80211_ptr;
  25         int err;
  26
  27         ASSERT_WDEV_LOCK(wdev);
  28
  29         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_OCB)
  30                 return -EOPNOTSUPP;
  31
  32         if (!rdev->ops->join_ocb)
  33                 return -EOPNOTSUPP;
  34
  35         if (WARN_ON(!setup->chandef.chan))
  36                 return -EINVAL;
  37
  38         err = rdev_join_ocb(rdev, dev, setup);
  39         if (!err)
  40                 wdev->chandef = setup->chandef;
  41
  42         return err;
  43 }
  44
  45 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
  46                       struct net_device *dev,
  47                       struct ocb_setup *setup)
  48 {
  49         struct wireless_dev *wdev = dev->ieee80211_ptr;
  50         int err;
  51
  52         wdev_lock(wdev);
  53         err = __cfg80211_join_ocb(rdev, dev, setup);
  54         wdev_unlock(wdev);
  55
  56         return err;
  57 }
  58
  59 int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
  60                          struct net_device *dev)
  61 {
  62         struct wireless_dev *wdev = dev->ieee80211_ptr;
  63         int err;
  64
  65         ASSERT_WDEV_LOCK(wdev);
  66
  67         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_OCB)
  68                 return -EOPNOTSUPP;
  69
  70         if (!rdev->ops->leave_ocb)
  71                 return -EOPNOTSUPP;
  72
  73         err = rdev_leave_ocb(rdev, dev);
  74         if (!err)
  75                 memset(&wdev->chandef, 0, sizeof(wdev->chandef));
  76
  77         return err;
  78 }
  79
  80 int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
  81                        struct net_device *dev)
  82 {
  83         struct wireless_dev *wdev = dev->ieee80211_ptr;
  84         int err;
  85
  86         wdev_lock(wdev);
  87         err = __cfg80211_leave_ocb(rdev, dev);
  88         wdev_unlock(wdev);
  89
  90         return err;
  91 }