linux/include/linux/netfilter_ipv6.h
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   1#ifndef __LINUX_IP6_NETFILTER_H
   2#define __LINUX_IP6_NETFILTER_H
   3
   4/* IPv6-specific defines for netfilter. 
   5 * (C)1998 Rusty Russell -- This code is GPL.
   6 * (C)1999 David Jeffery
   7 *   this header was blatantly ripped from netfilter_ipv4.h 
   8 *   it's amazing what adding a bunch of 6s can do =8^)
   9 */
  10
  11#include <linux/netfilter.h>
  12
  13/* only for userspace compatibility */
  14#ifndef __KERNEL__
  15
  16#include <limits.h> /* for INT_MIN, INT_MAX */
  17
  18/* IP Cache bits. */
  19/* Src IP address. */
  20#define NFC_IP6_SRC              0x0001
  21/* Dest IP address. */
  22#define NFC_IP6_DST              0x0002
  23/* Input device. */
  24#define NFC_IP6_IF_IN            0x0004
  25/* Output device. */
  26#define NFC_IP6_IF_OUT           0x0008
  27/* TOS. */
  28#define NFC_IP6_TOS              0x0010
  29/* Protocol. */
  30#define NFC_IP6_PROTO            0x0020
  31/* IP options. */
  32#define NFC_IP6_OPTIONS          0x0040
  33/* Frag & flags. */
  34#define NFC_IP6_FRAG             0x0080
  35
  36
  37/* Per-protocol information: only matters if proto match. */
  38/* TCP flags. */
  39#define NFC_IP6_TCPFLAGS         0x0100
  40/* Source port. */
  41#define NFC_IP6_SRC_PT           0x0200
  42/* Dest port. */
  43#define NFC_IP6_DST_PT           0x0400
  44/* Something else about the proto */
  45#define NFC_IP6_PROTO_UNKNOWN    0x2000
  46
  47/* IP6 Hooks */
  48/* After promisc drops, checksum checks. */
  49#define NF_IP6_PRE_ROUTING      0
  50/* If the packet is destined for this box. */
  51#define NF_IP6_LOCAL_IN         1
  52/* If the packet is destined for another interface. */
  53#define NF_IP6_FORWARD          2
  54/* Packets coming from a local process. */
  55#define NF_IP6_LOCAL_OUT                3
  56/* Packets about to hit the wire. */
  57#define NF_IP6_POST_ROUTING     4
  58#define NF_IP6_NUMHOOKS         5
  59#endif /* ! __KERNEL__ */
  60
  61
  62enum nf_ip6_hook_priorities {
  63        NF_IP6_PRI_FIRST = INT_MIN,
  64        NF_IP6_PRI_CONNTRACK_DEFRAG = -400,
  65        NF_IP6_PRI_RAW = -300,
  66        NF_IP6_PRI_SELINUX_FIRST = -225,
  67        NF_IP6_PRI_CONNTRACK = -200,
  68        NF_IP6_PRI_MANGLE = -150,
  69        NF_IP6_PRI_NAT_DST = -100,
  70        NF_IP6_PRI_FILTER = 0,
  71        NF_IP6_PRI_SECURITY = 50,
  72        NF_IP6_PRI_NAT_SRC = 100,
  73        NF_IP6_PRI_SELINUX_LAST = 225,
  74        NF_IP6_PRI_CONNTRACK_HELPER = 300,
  75        NF_IP6_PRI_LAST = INT_MAX,
  76};
  77
  78#ifdef  __KERNEL__
  79
  80#ifdef CONFIG_NETFILTER
  81extern int ip6_route_me_harder(struct sk_buff *skb);
  82extern __sum16 nf_ip6_checksum(struct sk_buff *skb, unsigned int hook,
  83                                    unsigned int dataoff, u_int8_t protocol);
  84
  85extern int ipv6_netfilter_init(void);
  86extern void ipv6_netfilter_fini(void);
  87#else /* CONFIG_NETFILTER */
  88static inline int ipv6_netfilter_init(void) { return 0; }
  89static inline void ipv6_netfilter_fini(void) { return; }
  90#endif /* CONFIG_NETFILTER */
  91
  92#endif /* __KERNEL__ */
  93
  94#endif /*__LINUX_IP6_NETFILTER_H*/
  95
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