netfilter.h revision 3ea2fb985f3aa979a2b270d01fa651a5ef814464 
1#ifndef __LINUX_NETFILTER_H
2#define __LINUX_NETFILTER_H
3
4#include <linux/types.h>
5
6/* Responses from hook functions. */
7#define NF_DROP 0
8#define NF_ACCEPT 1
9#define NF_STOLEN 2
10#define NF_QUEUE 3
11#define NF_REPEAT 4
12#define NF_STOP 5
13#define NF_MAX_VERDICT NF_STOP
14
15/* we overload the higher bits for encoding auxiliary data such as the queue
16 * number. Not nice, but better than additional function arguments. */
17#define NF_VERDICT_MASK 0x0000ffff
18#define NF_VERDICT_BITS 16
19
20#define NF_VERDICT_QMASK 0xffff0000
21#define NF_VERDICT_QBITS 16
22
23#define NF_QUEUE_NR(x) ((((x) << NF_VERDICT_BITS) & NF_VERDICT_QMASK) | NF_QUEUE)
24
25/* only for userspace compatibility */
26/* Generic cache responses from hook functions.
27   <= 0x2000 is used for protocol-flags. */
28#define NFC_UNKNOWN 0x4000
29#define NFC_ALTERED 0x8000
30
31enum nf_inet_hooks {
32	NF_INET_PRE_ROUTING,
33	NF_INET_LOCAL_IN,
34	NF_INET_FORWARD,
35	NF_INET_LOCAL_OUT,
36	NF_INET_POST_ROUTING,
37	NF_INET_NUMHOOKS
38};
39
40union nf_inet_addr {
41	__u32		all[4];
42	__be32		ip;
43	__be32		ip6[4];
44	struct in_addr	in;
45	struct in6_addr	in6;
46};
47
48#endif /*__LINUX_NETFILTER_H*/
49