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/config.h>
9 #include <linux/netfilter.h>
10
11 /* IP Cache bits. */
12 /* Src IP address. */
13 #define NFC_IP_SRC 0x0001
14 /* Dest IP address. */
15 #define NFC_IP_DST 0x0002
16 /* Input device. */
17 #define NFC_IP_IF_IN 0x0004
18 /* Output device. */
19 #define NFC_IP_IF_OUT 0x0008
20 /* TOS. */
21 #define NFC_IP_TOS 0x0010
22 /* Protocol. */
23 #define NFC_IP_PROTO 0x0020
24 /* IP options. */
25 #define NFC_IP_OPTIONS 0x0040
26 /* Frag & flags. */
27 #define NFC_IP_FRAG 0x0080
28
29 /* Per-protocol information: only matters if proto match. */
30 /* TCP flags. */
31 #define NFC_IP_TCPFLAGS 0x0100
32 /* Source port. */
33 #define NFC_IP_SRC_PT 0x0200
34 /* Dest port. */
35 #define NFC_IP_DST_PT 0x0400
36 /* Something else about the proto */
37 #define NFC_IP_PROTO_UNKNOWN 0x2000
38
39 /* IP Hooks */
40 /* After promisc drops, checksum checks. */
41 #define NF_IP_PRE_ROUTING 0
42 /* If the packet is destined for this box. */
43 #define NF_IP_LOCAL_IN 1
44 /* If the packet is destined for another interface. */
45 #define NF_IP_FORWARD 2
46 /* Packets coming from a local process. */
47 #define NF_IP_LOCAL_OUT 3
48 /* Packets about to hit the wire. */
49 #define NF_IP_POST_ROUTING 4
50 #define NF_IP_NUMHOOKS 5
51
52 enum nf_ip_hook_priorities {
53 NF_IP_PRI_FIRST = INT_MIN,
54 NF_IP_PRI_CONNTRACK = -200,
55 NF_IP_PRI_MANGLE = -150,
56 NF_IP_PRI_NAT_DST = -100,
57 NF_IP_PRI_FILTER = 0,
58 NF_IP_PRI_NAT_SRC = 100,
59 NF_IP_PRI_LAST = INT_MAX,
60 };
61
62 #ifdef CONFIG_NETFILTER_DEBUG
63 #ifdef __KERNEL__
64 void nf_debug_ip_local_deliver(struct sk_buff *skb);
65 void nf_debug_ip_loopback_xmit(struct sk_buff *newskb);
66 void nf_debug_ip_finish_output2(struct sk_buff *skb);
67 #endif /*__KERNEL__*/
68 #endif /*CONFIG_NETFILTER_DEBUG*/
69
70 /* Arguments for setsockopt SOL_IP: */
71 /* 2.0 firewalling went from 64 through 71 (and +256, +512, etc). */
72 /* 2.2 firewalling (+ masq) went from 64 through 76 */
73 /* 2.4 firewalling went 64 through 67. */
74 #define SO_ORIGINAL_DST 80
75
76 #endif /*__LINUX_IP_NETFILTER_H*/
77
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