netfilter.h revision 5a67f8f9d3a7f80a49554fb1ca4e68a1effd5399 
1#ifndef __LINUX_NETFILTER_H
2#define __LINUX_NETFILTER_H
3
4#include <linux/types.h>
5
6
7/* Responses from hook functions. */
8#define NF_DROP 0
9#define NF_ACCEPT 1
10#define NF_STOLEN 2
11#define NF_QUEUE 3
12#define NF_REPEAT 4
13#define NF_STOP 5
14#define NF_MAX_VERDICT NF_STOP
15
16/* we overload the higher bits for encoding auxiliary data such as the queue
17 * number. Not nice, but better than additional function arguments. */
18#define NF_VERDICT_MASK 0x0000ffff
19#define NF_VERDICT_BITS 16
20
21#define NF_VERDICT_QMASK 0xffff0000
22#define NF_VERDICT_QBITS 16
23
24#define NF_QUEUE_NR(x) ((((x) << NF_VERDICT_BITS) & NF_VERDICT_QMASK) | NF_QUEUE)
25
26/* only for userspace compatibility */
27/* Generic cache responses from hook functions.
28   <= 0x2000 is used for protocol-flags. */
29#define NFC_UNKNOWN 0x4000
30#define NFC_ALTERED 0x8000
31
32enum nf_inet_hooks {
33	NF_INET_PRE_ROUTING,
34	NF_INET_LOCAL_IN,
35	NF_INET_FORWARD,
36	NF_INET_LOCAL_OUT,
37	NF_INET_POST_ROUTING,
38	NF_INET_NUMHOOKS
39};
40
41union nf_inet_addr {
42	__u32		all[4];
43	__be32		ip;
44	__be32		ip6[4];
45	struct in_addr	in;
46	struct in6_addr	in6;
47};
48
49#endif /*__LINUX_NETFILTER_H*/
50