/*
   * CALIPSO - Common Architecture Label IPv6 Security Option
   *
   * This is an implementation of the CALIPSO protocol as specified in
   * RFC 5570.
   *
   * Authors: Paul Moore <paul@paul-moore.com>
   *          Huw Davies <huw@codeweavers.com>
   *
   */
  
  /*
   * (c) Copyright Hewlett-Packard Development Company, L.P., 2006
   * (c) Copyright Huw Davies <huw@codeweavers.com>, 2015
   *
   * This program is free software;  you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2 of the License, or
   * (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY;  without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
   * the GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program;  if not, see <http://www.gnu.org/licenses/>.
   *
   */
  
  #ifndef _CALIPSO_H
  #define _CALIPSO_H
  
  #include <linux/types.h>
  #include <linux/rcupdate.h>
  #include <linux/list.h>
  #include <linux/net.h>
  #include <linux/skbuff.h>
  #include <net/netlabel.h>
  #include <net/request_sock.h>
  #include <linux/atomic.h>
  #include <asm/unaligned.h>
  
  /* known doi values */
  #define CALIPSO_DOI_UNKNOWN          0x00000000
  
  /* doi mapping types */
  #define CALIPSO_MAP_UNKNOWN          0
  #define CALIPSO_MAP_PASS             2
  
  /*
   * CALIPSO DOI definitions
   */
  
  /* DOI definition struct */
  struct calipso_doi {
  	u32 doi;
  	u32 type;
  
  	atomic_t refcount;
  	struct list_head list;
  	struct rcu_head rcu;
  };

  /*
   * Sysctl Variables
   */
  extern int calipso_cache_enabled;
  extern int calipso_cache_bucketsize;

  #ifdef CONFIG_NETLABEL
  int __init calipso_init(void);
  void calipso_exit(void);

  bool calipso_validate(const struct sk_buff *skb, const unsigned char *option);

  #else
  static inline int __init calipso_init(void)
  {
  	return 0;
  }
  
  static inline void calipso_exit(void)
  {
  }

  static inline bool calipso_validate(const struct sk_buff *skb,
  				    const unsigned char *option)
  {
  	return true;
  }

  #endif /* CONFIG_NETLABEL */
  
  #endif /* _CALIPSO_H */