LXR linux/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
  20int __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
  45int 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
  59int __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
  80int 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}
  92