1 #ifndef __LINUX_IP_NETFILTER_H
2 #define __LINUX_IP_NETFILTER_H
4 /* IPv4-specific defines for netfilter.
5 * (C)1998 Rusty Russell -- This code is GPL.
8 #include <linux/config.h>
9 #include <linux/netfilter.h>
11 /* only for userspace compatibility */
15 #define NFC_IP_SRC 0x0001
16 /* Dest IP address. */
17 #define NFC_IP_DST 0x0002
19 #define NFC_IP_IF_IN 0x0004
21 #define NFC_IP_IF_OUT 0x0008
23 #define NFC_IP_TOS 0x0010
25 #define NFC_IP_PROTO 0x0020
27 #define NFC_IP_OPTIONS 0x0040
29 #define NFC_IP_FRAG 0x0080
31 /* Per-protocol information: only matters if proto match. */
33 #define NFC_IP_TCPFLAGS 0x0100
35 #define NFC_IP_SRC_PT 0x0200
37 #define NFC_IP_DST_PT 0x0400
38 /* Something else about the proto */
39 #define NFC_IP_PROTO_UNKNOWN 0x2000
40 #endif /* ! __KERNEL__ */
43 /* After promisc drops, checksum checks. */
44 #define NF_IP_PRE_ROUTING 0
45 /* If the packet is destined for this box. */
46 #define NF_IP_LOCAL_IN 1
47 /* If the packet is destined for another interface. */
48 #define NF_IP_FORWARD 2
49 /* Packets coming from a local process. */
50 #define NF_IP_LOCAL_OUT 3
51 /* Packets about to hit the wire. */
52 #define NF_IP_POST_ROUTING 4
53 #define NF_IP_NUMHOOKS 5
55 enum nf_ip_hook_priorities {
56 NF_IP_PRI_FIRST = INT_MIN,
57 NF_IP_PRI_CONNTRACK_DEFRAG = -400,
59 NF_IP_PRI_SELINUX_FIRST = -225,
60 NF_IP_PRI_CONNTRACK = -200,
61 NF_IP_PRI_BRIDGE_SABOTAGE_FORWARD = -175,
62 NF_IP_PRI_MANGLE = -150,
63 NF_IP_PRI_NAT_DST = -100,
64 NF_IP_PRI_BRIDGE_SABOTAGE_LOCAL_OUT = -50,
66 NF_IP_PRI_NAT_SRC = 100,
67 NF_IP_PRI_SELINUX_LAST = 225,
68 NF_IP_PRI_CONNTRACK_HELPER = INT_MAX - 2,
69 NF_IP_PRI_NAT_SEQ_ADJUST = INT_MAX - 1,
70 NF_IP_PRI_CONNTRACK_CONFIRM = INT_MAX,
71 NF_IP_PRI_LAST = INT_MAX,
74 /* Arguments for setsockopt SOL_IP: */
75 /* 2.0 firewalling went from 64 through 71 (and +256, +512, etc). */
76 /* 2.2 firewalling (+ masq) went from 64 through 76 */
77 /* 2.4 firewalling went 64 through 67. */
78 #define SO_ORIGINAL_DST 80
81 extern int ip_route_me_harder(struct sk_buff **pskb);
82 extern int ip_xfrm_me_harder(struct sk_buff **pskb);
85 #endif /*__LINUX_IP_NETFILTER_H*/