Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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#endif /* ! __KERNEL__ */
40
41/* IP Hooks */
42/* After promisc drops, checksum checks. */
43#define NF_IP_PRE_ROUTING 0
44/* If the packet is destined for this box. */
45#define NF_IP_LOCAL_IN 1
46/* If the packet is destined for another interface. */
47#define NF_IP_FORWARD 2
48/* Packets coming from a local process. */
49#define NF_IP_LOCAL_OUT 3
50/* Packets about to hit the wire. */
51#define NF_IP_POST_ROUTING 4
52#define NF_IP_NUMHOOKS 5
53
54enum nf_ip_hook_priorities {
55 NF_IP_PRI_FIRST = INT_MIN,
56 NF_IP_PRI_CONNTRACK_DEFRAG = -400,
57 NF_IP_PRI_RAW = -300,
58 NF_IP_PRI_SELINUX_FIRST = -225,
59 NF_IP_PRI_CONNTRACK = -200,
60 NF_IP_PRI_MANGLE = -150,
61 NF_IP_PRI_NAT_DST = -100,
62 NF_IP_PRI_FILTER = 0,
63 NF_IP_PRI_NAT_SRC = 100,
64 NF_IP_PRI_SELINUX_LAST = 225,
65 NF_IP_PRI_CONNTRACK_HELPER = INT_MAX - 2,
66 NF_IP_PRI_NAT_SEQ_ADJUST = INT_MAX - 1,
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#ifdef __KERNEL__
78extern int ip_route_me_harder(struct sk_buff **pskb, unsigned addr_type);
79extern int ip_xfrm_me_harder(struct sk_buff **pskb);
80extern __sum16 nf_ip_checksum(struct sk_buff *skb, unsigned int hook,
81 unsigned int dataoff, u_int8_t protocol);
82#endif /*__KERNEL__*/
83
84#endif /*__LINUX_IP_NETFILTER_H*/