include/linux/netfilter_ipv6.h

   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
  62 enum 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_LAST = INT_MAX,
  75 };
  76
  77 #ifdef  __KERNEL__
  78
  79 #ifdef CONFIG_NETFILTER
  80 extern int ip6_route_me_harder(struct sk_buff *skb);
  81 extern __sum16 nf_ip6_checksum(struct sk_buff *skb, unsigned int hook,
  82                                     unsigned int dataoff, u_int8_t protocol);
  83
  84 extern int ipv6_netfilter_init(void);
  85 extern void ipv6_netfilter_fini(void);
  86 #else /* CONFIG_NETFILTER */
  87 static inline int ipv6_netfilter_init(void) { return 0; }
  88 static inline void ipv6_netfilter_fini(void) { return; }
  89 #endif /* CONFIG_NETFILTER */
  90
  91 #endif /* __KERNEL__ */
  92
  93 #endif /*__LINUX_IP6_NETFILTER_H*/