netfilter_ipv4.h revision 9044a4547d73df5c41fd53c83e5ccc2a59200797 
1651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines#ifndef __LINUX_IP_NETFILTER_H
2651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines#define __LINUX_IP_NETFILTER_H
3651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines
4651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines/* IPv4-specific defines for netfilter.
56bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines * (C)1998 Rusty Russell -- This code is GPL.
6651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines */
7651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines
8651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines#include <linux/netfilter.h>
9651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines
10651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines/* only for userspace compatibility */
11651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines
12651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines#include <limits.h> /* for INT_MIN, INT_MAX */
13651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines
14651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines/* IP Cache bits. */
15651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines/* Src IP address. */
16651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines#define NFC_IP_SRC		0x0001
17651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines/* Dest IP address. */
18651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines#define NFC_IP_DST		0x0002
19651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines/* Input device. */
20651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines#define NFC_IP_IF_IN		0x0004
21651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines/* Output device. */
22651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines#define NFC_IP_IF_OUT		0x0008
23651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines/* TOS. */
24#define NFC_IP_TOS		0x0010
25/* Protocol. */
26#define NFC_IP_PROTO		0x0020
27/* IP options. */
28#define NFC_IP_OPTIONS		0x0040
29/* Frag & flags. */
30#define NFC_IP_FRAG		0x0080
31
32/* Per-protocol information: only matters if proto match. */
33/* TCP flags. */
34#define NFC_IP_TCPFLAGS		0x0100
35/* Source port. */
36#define NFC_IP_SRC_PT		0x0200
37/* Dest port. */
38#define NFC_IP_DST_PT		0x0400
39/* Something else about the proto */
40#define NFC_IP_PROTO_UNKNOWN	0x2000
41
42/* IP Hooks */
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
54
55enum nf_ip_hook_priorities {
56	NF_IP_PRI_FIRST = INT_MIN,
57	NF_IP_PRI_CONNTRACK_DEFRAG = -400,
58	NF_IP_PRI_RAW = -300,
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,
63	NF_IP_PRI_FILTER = 0,
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_CONFIRM = INT_MAX,
68	NF_IP_PRI_LAST = INT_MAX,
69};
70
71/* Arguments for setsockopt SOL_IP: */
72/* 2.0 firewalling went from 64 through 71 (and +256, +512, etc). */
73/* 2.2 firewalling (+ masq) went from 64 through 76 */
74/* 2.4 firewalling went 64 through 67. */
75#define SO_ORIGINAL_DST 80
76
77
78#endif /*__LINUX_IP_NETFILTER_H*/
79