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net/wireless/ocb.c 1.97 KB
81f7e3824   Eric Lee   Initial Release, ...
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  /*
   * OCB mode implementation
   *
   * Copyright: (c) 2014 Czech Technical University in Prague
   *            (c) 2014 Volkswagen Group Research
   * Author:    Rostislav Lisovy <rostislav.lisovy@fel.cvut.cz>
   * Funded by: Volkswagen Group Research
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 as
   * published by the Free Software Foundation.
   */
  
  #include <linux/ieee80211.h>
  #include <net/cfg80211.h>
  #include "nl80211.h"
  #include "core.h"
  #include "rdev-ops.h"
  
  int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
  			struct net_device *dev,
  			struct ocb_setup *setup)
  {
  	struct wireless_dev *wdev = dev->ieee80211_ptr;
  	int err;
  
  	ASSERT_WDEV_LOCK(wdev);
  
  	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_OCB)
  		return -EOPNOTSUPP;
  
  	if (!rdev->ops->join_ocb)
  		return -EOPNOTSUPP;
  
  	if (WARN_ON(!setup->chandef.chan))
  		return -EINVAL;
  
  	err = rdev_join_ocb(rdev, dev, setup);
  	if (!err)
  		wdev->chandef = setup->chandef;
  
  	return err;
  }
  
  int cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
  		      struct net_device *dev,
  		      struct ocb_setup *setup)
  {
  	struct wireless_dev *wdev = dev->ieee80211_ptr;
  	int err;
  
  	wdev_lock(wdev);
  	err = __cfg80211_join_ocb(rdev, dev, setup);
  	wdev_unlock(wdev);
  
  	return err;
  }
  
  int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
  			 struct net_device *dev)
  {
  	struct wireless_dev *wdev = dev->ieee80211_ptr;
  	int err;
  
  	ASSERT_WDEV_LOCK(wdev);
  
  	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_OCB)
  		return -EOPNOTSUPP;
  
  	if (!rdev->ops->leave_ocb)
  		return -EOPNOTSUPP;
  
  	err = rdev_leave_ocb(rdev, dev);
  	if (!err)
  		memset(&wdev->chandef, 0, sizeof(wdev->chandef));
  
  	return err;
  }
  
  int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
  		       struct net_device *dev)
  {
  	struct wireless_dev *wdev = dev->ieee80211_ptr;
  	int err;
  
  	wdev_lock(wdev);
  	err = __cfg80211_leave_ocb(rdev, dev);
  	wdev_unlock(wdev);
  
  	return err;
  }