include/net/calipso.h

   1 /*
   2  * CALIPSO - Common Architecture Label IPv6 Security Option
   3  *
   4  * This is an implementation of the CALIPSO protocol as specified in
   5  * RFC 5570.
   6  *
   7  * Authors: Paul Moore <paul@paul-moore.com>
   8  *          Huw Davies <huw@codeweavers.com>
   9  *
  10  */
  11
  12 /*
  13  * (c) Copyright Hewlett-Packard Development Company, L.P., 2006
  14  * (c) Copyright Huw Davies <huw@codeweavers.com>, 2015
  15  *
  16  * This program is free software;  you can redistribute it and/or modify
  17  * it under the terms of the GNU General Public License as published by
  18  * the Free Software Foundation; either version 2 of the License, or
  19  * (at your option) any later version.
  20  *
  21  * This program is distributed in the hope that it will be useful,
  22  * but WITHOUT ANY WARRANTY;  without even the implied warranty of
  23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  24  * the GNU General Public License for more details.
  25  *
  26  * You should have received a copy of the GNU General Public License
  27  * along with this program;  if not, see <http://www.gnu.org/licenses/>.
  28  *
  29  */
  30
  31 #ifndef _CALIPSO_H
  32 #define _CALIPSO_H
  33
  34 #include <linux/types.h>
  35 #include <linux/rcupdate.h>
  36 #include <linux/list.h>
  37 #include <linux/net.h>
  38 #include <linux/skbuff.h>
  39 #include <net/netlabel.h>
  40 #include <net/request_sock.h>
  41 #include <linux/atomic.h>
  42 #include <asm/unaligned.h>
  43
  44 /* known doi values */
  45 #define CALIPSO_DOI_UNKNOWN          0x00000000
  46
  47 /* doi mapping types */
  48 #define CALIPSO_MAP_UNKNOWN          0
  49 #define CALIPSO_MAP_PASS             2
  50
  51 /*
  52  * CALIPSO DOI definitions
  53  */
  54
  55 /* DOI definition struct */
  56 struct calipso_doi {
  57         u32 doi;
  58         u32 type;
  59
  60         atomic_t refcount;
  61         struct list_head list;
  62         struct rcu_head rcu;
  63 };
  64
  65 /*
  66  * Sysctl Variables
  67  */
  68 extern int calipso_cache_enabled;
  69 extern int calipso_cache_bucketsize;
  70
  71 #ifdef CONFIG_NETLABEL
  72 int __init calipso_init(void);
  73 void calipso_exit(void);
  74 bool calipso_validate(const struct sk_buff *skb, const unsigned char *option);
  75 #else
  76 static inline int __init calipso_init(void)
  77 {
  78         return 0;
  79 }
  80
  81 static inline void calipso_exit(void)
  82 {
  83 }
  84 static inline bool calipso_validate(const struct sk_buff *skb,
  85                                     const unsigned char *option)
  86 {
  87         return true;
  88 }
  89 #endif /* CONFIG_NETLABEL */
  90
  91 #endif /* _CALIPSO_H */