1 #ifndef __LINUX_IP_NETFILTER_H 2 #define __LINUX_IP_NETFILTER_H 3 4 /* IPv4-specific defines for netfilter. 5 * (C)1998 Rusty Russell -- This code is GPL. 6 */ 7 8 #include <linux/netfilter.h> 9 10 /* only for userspace compatibility */ 11 #ifndef __KERNEL__ 12 13 #include <limits.h> /* for INT_MIN, INT_MAX */ 14 15 /* IP Cache bits. */ 16 /* Src IP address. */ 17 #define NFC_IP_SRC 0x0001 18 /* Dest IP address. */ 19 #define NFC_IP_DST 0x0002 20 /* Input device. */ 21 #define NFC_IP_IF_IN 0x0004 22 /* Output device. */ 23 #define NFC_IP_IF_OUT 0x0008 24 /* TOS. */ 25 #define NFC_IP_TOS 0x0010 26 /* Protocol. */ 27 #define NFC_IP_PROTO 0x0020 28 /* IP options. */ 29 #define NFC_IP_OPTIONS 0x0040 30 /* Frag & flags. */ 31 #define NFC_IP_FRAG 0x0080 32 33 /* Per-protocol information: only matters if proto match. */ 34 /* TCP flags. */ 35 #define NFC_IP_TCPFLAGS 0x0100 36 /* Source port. */ 37 #define NFC_IP_SRC_PT 0x0200 38 /* Dest port. */ 39 #define NFC_IP_DST_PT 0x0400 40 /* Something else about the proto */ 41 #define NFC_IP_PROTO_UNKNOWN 0x2000 42 43 /* IP Hooks */ 44 /* After promisc drops, checksum checks. */ 45 #define NF_IP_PRE_ROUTING 0 46 /* If the packet is destined for this box. */ 47 #define NF_IP_LOCAL_IN 1 48 /* If the packet is destined for another interface. */ 49 #define NF_IP_FORWARD 2 50 /* Packets coming from a local process. */ 51 #define NF_IP_LOCAL_OUT 3 52 /* Packets about to hit the wire. */ 53 #define NF_IP_POST_ROUTING 4 54 #define NF_IP_NUMHOOKS 5 55 #endif /* ! __KERNEL__ */ 56 57 enum nf_ip_hook_priorities { 58 NF_IP_PRI_FIRST = INT_MIN, 59 NF_IP_PRI_CONNTRACK_DEFRAG = -400, 60 NF_IP_PRI_RAW = -300, 61 NF_IP_PRI_SELINUX_FIRST = -225, 62 NF_IP_PRI_CONNTRACK = -200, 63 NF_IP_PRI_MANGLE = -150, 64 NF_IP_PRI_NAT_DST = -100, 65 NF_IP_PRI_FILTER = 0, 66 NF_IP_PRI_SECURITY = 50, 67 NF_IP_PRI_NAT_SRC = 100, 68 NF_IP_PRI_SELINUX_LAST = 225, 69 NF_IP_PRI_CONNTRACK_CONFIRM = INT_MAX, 70 NF_IP_PRI_LAST = INT_MAX, 71 }; 72 73 /* Arguments for setsockopt SOL_IP: */ 74 /* 2.0 firewalling went from 64 through 71 (and +256, +512, etc). */ 75 /* 2.2 firewalling (+ masq) went from 64 through 76 */ 76 /* 2.4 firewalling went 64 through 67. */ 77 #define SO_ORIGINAL_DST 80 78 79 #ifdef __KERNEL__ 80 extern int ip_route_me_harder(struct sk_buff *skb, unsigned addr_type); 81 extern int ip_xfrm_me_harder(struct sk_buff *skb); 82 extern __sum16 nf_ip_checksum(struct sk_buff *skb, unsigned int hook, 83 unsigned int dataoff, u_int8_t protocol); 84 #endif /*__KERNEL__*/ 85 86 #endif /*__LINUX_IP_NETFILTER_H*/ 87