]>
Commit | Line | Data |
---|---|---|
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 | ||
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_DEFRAG = -400, | |
55 | NF_IP_PRI_RAW = -300, | |
56 | NF_IP_PRI_SELINUX_FIRST = -225, | |
57 | NF_IP_PRI_CONNTRACK = -200, | |
58 | NF_IP_PRI_BRIDGE_SABOTAGE_FORWARD = -175, | |
59 | NF_IP_PRI_MANGLE = -150, | |
60 | NF_IP_PRI_NAT_DST = -100, | |
61 | NF_IP_PRI_BRIDGE_SABOTAGE_LOCAL_OUT = -50, | |
62 | NF_IP_PRI_FILTER = 0, | |
63 | NF_IP_PRI_NAT_SRC = 100, | |
64 | NF_IP_PRI_SELINUX_LAST = 225, | |
65 | NF_IP_PRI_LAST = INT_MAX, | |
66 | }; | |
67 | ||
68 | /* Arguments for setsockopt SOL_IP: */ | |
69 | /* 2.0 firewalling went from 64 through 71 (and +256, +512, etc). */ | |
70 | /* 2.2 firewalling (+ masq) went from 64 through 76 */ | |
71 | /* 2.4 firewalling went 64 through 67. */ | |
72 | #define SO_ORIGINAL_DST 80 | |
73 | ||
74 | #ifdef __KERNEL__ | |
75 | #ifdef CONFIG_NETFILTER_DEBUG | |
76 | void nf_debug_ip_local_deliver(struct sk_buff *skb); | |
77 | void nf_debug_ip_loopback_xmit(struct sk_buff *newskb); | |
78 | void nf_debug_ip_finish_output2(struct sk_buff *skb); | |
79 | #endif /*CONFIG_NETFILTER_DEBUG*/ | |
80 | ||
81 | extern int ip_route_me_harder(struct sk_buff **pskb); | |
82 | ||
83 | /* Call this before modifying an existing IP packet: ensures it is | |
84 | modifiable and linear to the point you care about (writable_len). | |
85 | Returns true or false. */ | |
86 | extern int skb_ip_make_writable(struct sk_buff **pskb, | |
87 | unsigned int writable_len); | |
88 | #endif /*__KERNEL__*/ | |
89 | ||
90 | #endif /*__LINUX_IP_NETFILTER_H*/ |