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1da177e4 LT |
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 | ||
1da177e4 LT |
8 | #include <linux/netfilter.h> |
9 | ||
6869c4d8 HW |
10 | /* only for userspace compatibility */ |
11 | #ifndef __KERNEL__ | |
598aaff2 BH |
12 | |
13 | #include <limits.h> /* for INT_MIN, INT_MAX */ | |
14 | ||
1da177e4 LT |
15 | /* IP Cache bits. */ |
16 | /* Src IP address. */ | |
17 | #define NFC_IP_SRC 0x0001 | |
18 | /* Dest IP address. */ | |
19 | #define NFC_IP_DST 0x0002 | |
20 | /* Input device. */ | |
21 | #define NFC_IP_IF_IN 0x0004 | |
22 | /* Output device. */ | |
23 | #define NFC_IP_IF_OUT 0x0008 | |
24 | /* TOS. */ | |
25 | #define NFC_IP_TOS 0x0010 | |
26 | /* Protocol. */ | |
27 | #define NFC_IP_PROTO 0x0020 | |
28 | /* IP options. */ | |
29 | #define NFC_IP_OPTIONS 0x0040 | |
30 | /* Frag & flags. */ | |
31 | #define NFC_IP_FRAG 0x0080 | |
32 | ||
33 | /* Per-protocol information: only matters if proto match. */ | |
34 | /* TCP flags. */ | |
35 | #define NFC_IP_TCPFLAGS 0x0100 | |
36 | /* Source port. */ | |
37 | #define NFC_IP_SRC_PT 0x0200 | |
38 | /* Dest port. */ | |
39 | #define NFC_IP_DST_PT 0x0400 | |
40 | /* Something else about the proto */ | |
41 | #define NFC_IP_PROTO_UNKNOWN 0x2000 | |
42 | ||
43 | /* IP Hooks */ | |
44 | /* After promisc drops, checksum checks. */ | |
45 | #define NF_IP_PRE_ROUTING 0 | |
46 | /* If the packet is destined for this box. */ | |
47 | #define NF_IP_LOCAL_IN 1 | |
48 | /* If the packet is destined for another interface. */ | |
49 | #define NF_IP_FORWARD 2 | |
50 | /* Packets coming from a local process. */ | |
51 | #define NF_IP_LOCAL_OUT 3 | |
52 | /* Packets about to hit the wire. */ | |
53 | #define NF_IP_POST_ROUTING 4 | |
54 | #define NF_IP_NUMHOOKS 5 | |
6e23ae2a | 55 | #endif /* ! __KERNEL__ */ |
1da177e4 LT |
56 | |
57 | enum nf_ip_hook_priorities { | |
58 | NF_IP_PRI_FIRST = INT_MIN, | |
59 | NF_IP_PRI_CONNTRACK_DEFRAG = -400, | |
60 | NF_IP_PRI_RAW = -300, | |
61 | NF_IP_PRI_SELINUX_FIRST = -225, | |
62 | NF_IP_PRI_CONNTRACK = -200, | |
1da177e4 LT |
63 | NF_IP_PRI_MANGLE = -150, |
64 | NF_IP_PRI_NAT_DST = -100, | |
1da177e4 | 65 | NF_IP_PRI_FILTER = 0, |
560ee653 | 66 | NF_IP_PRI_SECURITY = 50, |
1da177e4 LT |
67 | NF_IP_PRI_NAT_SRC = 100, |
68 | NF_IP_PRI_SELINUX_LAST = 225, | |
e281e3ac | 69 | NF_IP_PRI_CONNTRACK_CONFIRM = INT_MAX, |
1da177e4 LT |
70 | NF_IP_PRI_LAST = INT_MAX, |
71 | }; | |
72 | ||
73 | /* Arguments for setsockopt SOL_IP: */ | |
74 | /* 2.0 firewalling went from 64 through 71 (and +256, +512, etc). */ | |
75 | /* 2.2 firewalling (+ masq) went from 64 through 76 */ | |
76 | /* 2.4 firewalling went 64 through 67. */ | |
77 | #define SO_ORIGINAL_DST 80 | |
78 | ||
79 | #ifdef __KERNEL__ | |
3db05fea HX |
80 | extern int ip_route_me_harder(struct sk_buff *skb, unsigned addr_type); |
81 | extern int ip_xfrm_me_harder(struct sk_buff *skb); | |
b51655b9 | 82 | extern __sum16 nf_ip_checksum(struct sk_buff *skb, unsigned int hook, |
422c346f | 83 | unsigned int dataoff, u_int8_t protocol); |
1da177e4 LT |
84 | #endif /*__KERNEL__*/ |
85 | ||
86 | #endif /*__LINUX_IP_NETFILTER_H*/ |