1 /* IPv4-specific defines for netfilter.
2 * (C)1998 Rusty Russell -- This code is GPL.
4 #ifndef __LINUX_IP_NETFILTER_H
5 #define __LINUX_IP_NETFILTER_H
8 #include <linux/netfilter.h>
10 /* only for userspace compatibility */
12 #include <limits.h> /* for INT_MIN, INT_MAX */
16 #define NFC_IP_SRC 0x0001
17 /* Dest IP address. */
18 #define NFC_IP_DST 0x0002
20 #define NFC_IP_IF_IN 0x0004
22 #define NFC_IP_IF_OUT 0x0008
24 #define NFC_IP_TOS 0x0010
26 #define NFC_IP_PROTO 0x0020
28 #define NFC_IP_OPTIONS 0x0040
30 #define NFC_IP_FRAG 0x0080
32 /* Per-protocol information: only matters if proto match. */
34 #define NFC_IP_TCPFLAGS 0x0100
36 #define NFC_IP_SRC_PT 0x0200
38 #define NFC_IP_DST_PT 0x0400
39 /* Something else about the proto */
40 #define NFC_IP_PROTO_UNKNOWN 0x2000
43 /* After promisc drops, checksum checks. */
44 #define NF_IP_PRE_ROUTING 0
45 /* If the packet is destined for this box. */
46 #define NF_IP_LOCAL_IN 1
47 /* If the packet is destined for another interface. */
48 #define NF_IP_FORWARD 2
49 /* Packets coming from a local process. */
50 #define NF_IP_LOCAL_OUT 3
51 /* Packets about to hit the wire. */
52 #define NF_IP_POST_ROUTING 4
53 #define NF_IP_NUMHOOKS 5
55 enum nf_ip_hook_priorities {
56 NF_IP_PRI_FIRST = INT_MIN,
57 NF_IP_PRI_CONNTRACK_DEFRAG = -400,
59 NF_IP_PRI_SELINUX_FIRST = -225,
60 NF_IP_PRI_CONNTRACK = -200,
61 NF_IP_PRI_MANGLE = -150,
62 NF_IP_PRI_NAT_DST = -100,
64 NF_IP_PRI_SECURITY = 50,
65 NF_IP_PRI_NAT_SRC = 100,
66 NF_IP_PRI_SELINUX_LAST = 225,
67 NF_IP_PRI_CONNTRACK_HELPER = 300,
68 NF_IP_PRI_CONNTRACK_CONFIRM = INT_MAX,
69 NF_IP_PRI_LAST = INT_MAX,
72 /* Arguments for setsockopt SOL_IP: */
73 /* 2.0 firewalling went from 64 through 71 (and +256, +512, etc). */
74 /* 2.2 firewalling (+ masq) went from 64 through 76 */
75 /* 2.4 firewalling went 64 through 67. */
76 #define SO_ORIGINAL_DST 80
79 #endif /* __LINUX_IP_NETFILTER_H */