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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 | |
40 | /* IP Hooks */ |
41 | /* After promisc drops, checksum checks. */ |
42 | #define NF_IP_PRE_ROUTING 0 |
43 | /* If the packet is destined for this box. */ |
44 | #define NF_IP_LOCAL_IN 1 |
45 | /* If the packet is destined for another interface. */ |
46 | #define NF_IP_FORWARD 2 |
47 | /* Packets coming from a local process. */ |
48 | #define NF_IP_LOCAL_OUT 3 |
49 | /* Packets about to hit the wire. */ |
50 | #define NF_IP_POST_ROUTING 4 |
51 | #define NF_IP_NUMHOOKS 5 |
52 | #endif /* ! __KERNEL__ */ |
53 | |
54 | enum 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_SECURITY = 50, |
64 | NF_IP_PRI_NAT_SRC = 100, |
65 | NF_IP_PRI_SELINUX_LAST = 225, |
66 | NF_IP_PRI_CONNTRACK_CONFIRM = INT_MAX, |
67 | NF_IP_PRI_LAST = INT_MAX, |
68 | }; |
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 | #ifdef __KERNEL__ |
77 | extern int ip_route_me_harder(struct sk_buff *skb, unsigned addr_type); |
78 | extern int ip_xfrm_me_harder(struct sk_buff *skb); |
79 | extern __sum16 nf_ip_checksum(struct sk_buff *skb, unsigned int hook, |
80 | unsigned int dataoff, u_int8_t protocol); |
81 | #endif /*__KERNEL__*/ |
82 | |
83 | #endif /*__LINUX_IP_NETFILTER_H*/ |
84 |
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