netfilter.h revision 03d99486d8283552705b58dc55b6085dffc38792 
1#ifndef __LINUX_NETFILTER_H
2#define __LINUX_NETFILTER_H
3
4
5/* Responses from hook functions. */
6#define NF_DROP 0
7#define NF_ACCEPT 1
8#define NF_STOLEN 2
9#define NF_QUEUE 3
10#define NF_REPEAT 4
11#define NF_STOP 5
12#define NF_MAX_VERDICT NF_STOP
13
14/* we overload the higher bits for encoding auxiliary data such as the queue
15 * number. Not nice, but better than additional function arguments. */
16#define NF_VERDICT_MASK 0x0000ffff
17#define NF_VERDICT_BITS 16
18
19#define NF_VERDICT_QMASK 0xffff0000
20#define NF_VERDICT_QBITS 16
21
22#define NF_QUEUE_NR(x) ((((x) << NF_VERDICT_BITS) & NF_VERDICT_QMASK) | NF_QUEUE)
23
24/* only for userspace compatibility */
25/* Generic cache responses from hook functions.
26   <= 0x2000 is used for protocol-flags. */
27#define NFC_UNKNOWN 0x4000
28#define NFC_ALTERED 0x8000
29
30enum nf_inet_hooks {
31	NF_INET_PRE_ROUTING,
32	NF_INET_LOCAL_IN,
33	NF_INET_FORWARD,
34	NF_INET_LOCAL_OUT,
35	NF_INET_POST_ROUTING,
36	NF_INET_NUMHOOKS
37};
38
39enum {
40	NFPROTO_UNSPEC =  0,
41	NFPROTO_IPV4   =  2,
42	NFPROTO_ARP    =  3,
43	NFPROTO_BRIDGE =  7,
44	NFPROTO_IPV6   = 10,
45	NFPROTO_DECNET = 12,
46	NFPROTO_NUMPROTO,
47};
48
49union nf_inet_addr {
50	__u32		all[4];
51	__be32		ip;
52	__be32		ip6[4];
53	struct in_addr	in;
54	struct in6_addr	in6;
55};
56
57#endif /*__LINUX_NETFILTER_H*/
58