#ifndef __LINUX_DECNET_NETFILTER_H
  #define __LINUX_DECNET_NETFILTER_H
  
  /* DECnet-specific defines for netfilter. 
   * This file (C) Steve Whitehouse 1999 derived from the
   * ipv4 netfilter header file which is
   * (C)1998 Rusty Russell -- This code is GPL.
   */
  
  #include <linux/netfilter.h>

  /* only for userspace compatibility */
  #ifndef __KERNEL__

  
  #include <limits.h> /* for INT_MIN, INT_MAX */

  /* IP Cache bits. */
  /* Src IP address. */
  #define NFC_DN_SRC		0x0001
  /* Dest IP address. */
  #define NFC_DN_DST		0x0002
  /* Input device. */
  #define NFC_DN_IF_IN		0x0004
  /* Output device. */
  #define NFC_DN_IF_OUT		0x0008

  #endif /* ! __KERNEL__ */

  
  /* DECnet Hooks */
  /* After promisc drops, checksum checks. */
  #define NF_DN_PRE_ROUTING	0
  /* If the packet is destined for this box. */
  #define NF_DN_LOCAL_IN		1
  /* If the packet is destined for another interface. */
  #define NF_DN_FORWARD		2
  /* Packets coming from a local process. */
  #define NF_DN_LOCAL_OUT		3
  /* Packets about to hit the wire. */
  #define NF_DN_POST_ROUTING	4
  /* Input Hello Packets */
  #define NF_DN_HELLO		5
  /* Input Routing Packets */
  #define NF_DN_ROUTE		6
  #define NF_DN_NUMHOOKS		7
  
  enum nf_dn_hook_priorities {
  	NF_DN_PRI_FIRST = INT_MIN,
  	NF_DN_PRI_CONNTRACK = -200,
  	NF_DN_PRI_MANGLE = -150,
  	NF_DN_PRI_NAT_DST = -100,
  	NF_DN_PRI_FILTER = 0,
  	NF_DN_PRI_NAT_SRC = 100,
  	NF_DN_PRI_DNRTMSG = 200,
  	NF_DN_PRI_LAST = INT_MAX,
  };
  
  struct nf_dn_rtmsg {
  	int nfdn_ifindex;
  };
  
  #define NFDN_RTMSG(r) ((unsigned char *)(r) + NLMSG_ALIGN(sizeof(struct nf_dn_rtmsg)))

  #ifndef __KERNEL__
  /* backwards compatibility for userspace */

  #define DNRMG_L1_GROUP 0x01
  #define DNRMG_L2_GROUP 0x02

  #endif
  
  enum {
  	DNRNG_NLGRP_NONE,
  #define DNRNG_NLGRP_NONE	DNRNG_NLGRP_NONE
  	DNRNG_NLGRP_L1,
  #define DNRNG_NLGRP_L1		DNRNG_NLGRP_L1
  	DNRNG_NLGRP_L2,
  #define DNRNG_NLGRP_L2		DNRNG_NLGRP_L2
  	__DNRNG_NLGRP_MAX
  };
  #define DNRNG_NLGRP_MAX	(__DNRNG_NLGRP_MAX - 1)

  
  #endif /*__LINUX_DECNET_NETFILTER_H*/