release/src-rt-6.x.4708/linux/linux-2.6.36/include/linux/netfilter_ipv4.h

   1 #ifndef __LINUX_IP_NETFILTER_H
   2 #define __LINUX_IP_NETFILTER_H
   3
   4 /* IPv4-specific defines for netfilter.
   5  * (C)1998 Rusty Russell -- This code is GPL.
   6  */
   7
   8 #include <linux/netfilter.h>
   9
  10 /* only for userspace compatibility */
  11 //#ifndef __KERNEL__
  12 /* IP Cache bits. */
  13 /* Src IP address. */
  14 #define NFC_IP_SRC              0x0001
  15 /* Dest IP address. */
  16 #define NFC_IP_DST              0x0002
  17 /* Input device. */
  18 #define NFC_IP_IF_IN            0x0004
  19 /* Output device. */
  20 #define NFC_IP_IF_OUT           0x0008
  21 /* TOS. */
  22 #define NFC_IP_TOS              0x0010
  23 /* Protocol. */
  24 #define NFC_IP_PROTO            0x0020
  25 /* IP options. */
  26 #define NFC_IP_OPTIONS          0x0040
  27 /* Frag & flags. */
  28 #define NFC_IP_FRAG             0x0080
  29
  30 /* Per-protocol information: only matters if proto match. */
  31 /* TCP flags. */
  32 #define NFC_IP_TCPFLAGS         0x0100
  33 /* Source port. */
  34 #define NFC_IP_SRC_PT           0x0200
  35 /* Dest port. */
  36 #define NFC_IP_DST_PT           0x0400
  37 /* Something else about the proto */
  38 #define NFC_IP_PROTO_UNKNOWN    0x2000
  39
  40 /* IP Hooks */
  41 /* After promisc drops, checksum checks. */
  42 #define NF_IP_PRE_ROUTING       0
  43 /* If the packet is destined for this box. */
  44 #define NF_IP_LOCAL_IN          1
  45 /* If the packet is destined for another interface. */
  46 #define NF_IP_FORWARD           2
  47 /* Packets coming from a local process. */
  48 #define NF_IP_LOCAL_OUT         3
  49 /* Packets about to hit the wire. */
  50 #define NF_IP_POST_ROUTING      4
  51 #define NF_IP_NUMHOOKS          5
  52 //#endif /* ! __KERNEL__ */
  53
  54 #ifdef CONFIG_IP_NF_TARGET_CONE
  55 /* Cone NAT, Otherwise Symmetric NAT */
  56 #define NFC_IP_CONE_NAT         0x0800
  57 #define NFC_IP_CONE_NAT_ALTERED 0x1000
  58 #endif /* CONFIG_IP_NF_TARGET_CONE */
  59
  60 enum nf_ip_hook_priorities {
  61         NF_IP_PRI_FIRST = INT_MIN,
  62         NF_IP_PRI_CONNTRACK_DEFRAG = -400,
  63         NF_IP_PRI_RAW = -300,
  64         NF_IP_PRI_SELINUX_FIRST = -225,
  65         NF_IP_PRI_CONNTRACK = -200,
  66         NF_IP_PRI_MANGLE = -150,
  67         NF_IP_PRI_NAT_DST = -100,
  68         NF_IP_PRI_FILTER = 0,
  69         NF_IP_PRI_SECURITY = 50,
  70         NF_IP_PRI_NAT_SRC = 100,
  71         NF_IP_PRI_SELINUX_LAST = 225,
  72         NF_IP_PRI_CONNTRACK_CONFIRM = INT_MAX,
  73         NF_IP_PRI_LAST = INT_MAX,
  74 };
  75
  76 /* Arguments for setsockopt SOL_IP: */
  77 /* 2.0 firewalling went from 64 through 71 (and +256, +512, etc). */
  78 /* 2.2 firewalling (+ masq) went from 64 through 76 */
  79 /* 2.4 firewalling went 64 through 67. */
  80 #define SO_ORIGINAL_DST 80
  81
  82 #ifdef __KERNEL__
  83 extern int ip_route_me_harder(struct sk_buff *skb, unsigned addr_type);
  84 extern int ip_xfrm_me_harder(struct sk_buff *skb);
  85 extern __sum16 nf_ip_checksum(struct sk_buff *skb, unsigned int hook,
  86                                    unsigned int dataoff, u_int8_t protocol);
  87 #endif /*__KERNEL__*/
  88
  89 #endif /*__LINUX_IP_NETFILTER_H*/