1 #ifndef __LINUX_IP6_NETFILTER_H
2 #define __LINUX_IP6_NETFILTER_H
3 
4 /* IPv6-specific defines for netfilter.
5  * (C)1998 Rusty Russell -- This code is GPL.
6  * (C)1999 David Jeffery
7  *   this header was blatantly ripped from netfilter_ipv4.h
8  *   it's amazing what adding a bunch of 6s can do =8^)
9  */
10 
11 #include <linux/netfilter.h>
12 
13 /* only for userspace compatibility */
14 #ifndef __KERNEL__
15 
16 #include <limits.h> /* for INT_MIN, INT_MAX */
17 
18 /* IP Cache bits. */
19 /* Src IP address. */
20 #define NFC_IP6_SRC              0x0001
21 /* Dest IP address. */
22 #define NFC_IP6_DST              0x0002
23 /* Input device. */
24 #define NFC_IP6_IF_IN            0x0004
25 /* Output device. */
26 #define NFC_IP6_IF_OUT           0x0008
27 /* TOS. */
28 #define NFC_IP6_TOS              0x0010
29 /* Protocol. */
30 #define NFC_IP6_PROTO            0x0020
31 /* IP options. */
32 #define NFC_IP6_OPTIONS          0x0040
33 /* Frag & flags. */
34 #define NFC_IP6_FRAG             0x0080
35 
36 
37 /* Per-protocol information: only matters if proto match. */
38 /* TCP flags. */
39 #define NFC_IP6_TCPFLAGS         0x0100
40 /* Source port. */
41 #define NFC_IP6_SRC_PT           0x0200
42 /* Dest port. */
43 #define NFC_IP6_DST_PT           0x0400
44 /* Something else about the proto */
45 #define NFC_IP6_PROTO_UNKNOWN    0x2000
46 
47 /* IP6 Hooks */
48 /* After promisc drops, checksum checks. */
49 #define NF_IP6_PRE_ROUTING	0
50 /* If the packet is destined for this box. */
51 #define NF_IP6_LOCAL_IN		1
52 /* If the packet is destined for another interface. */
53 #define NF_IP6_FORWARD		2
54 /* Packets coming from a local process. */
55 #define NF_IP6_LOCAL_OUT		3
56 /* Packets about to hit the wire. */
57 #define NF_IP6_POST_ROUTING	4
58 #define NF_IP6_NUMHOOKS		5
59 #endif /* ! __KERNEL__ */
60 
61 
62 enum nf_ip6_hook_priorities {
63 	NF_IP6_PRI_FIRST = INT_MIN,
64 	NF_IP6_PRI_CONNTRACK_DEFRAG = -400,
65 	NF_IP6_PRI_RAW = -300,
66 	NF_IP6_PRI_SELINUX_FIRST = -225,
67 	NF_IP6_PRI_CONNTRACK = -200,
68 	NF_IP6_PRI_MANGLE = -150,
69 	NF_IP6_PRI_NAT_DST = -100,
70 	NF_IP6_PRI_FILTER = 0,
71 	NF_IP6_PRI_SECURITY = 50,
72 	NF_IP6_PRI_NAT_SRC = 100,
73 	NF_IP6_PRI_SELINUX_LAST = 225,
74 	NF_IP6_PRI_LAST = INT_MAX,
75 };
76 
77 #ifdef  __KERNEL__
78 
79 #ifdef CONFIG_NETFILTER
80 extern int ip6_route_me_harder(struct sk_buff *skb);
81 extern __sum16 nf_ip6_checksum(struct sk_buff *skb, unsigned int hook,
82 				    unsigned int dataoff, u_int8_t protocol);
83 
84 extern int ipv6_netfilter_init(void);
85 extern void ipv6_netfilter_fini(void);
86 #else /* CONFIG_NETFILTER */
ipv6_netfilter_init(void)87 static inline int ipv6_netfilter_init(void) { return 0; }
ipv6_netfilter_fini(void)88 static inline void ipv6_netfilter_fini(void) { return; }
89 #endif /* CONFIG_NETFILTER */
90 
91 #endif /* __KERNEL__ */
92 
93 #endif /*__LINUX_IP6_NETFILTER_H*/
94