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/* IP Cache bits. */ 13/* Src IP address. */ 14#define NFC_IP_SRC 0x0001 15/* Dest IP address. */ 16#define NFC_IP_DST 0x0002 17/* Input device. */ 18#define NFC_IP_IF_IN 0x0004 19/* Output device. */ 20#define NFC_IP_IF_OUT 0x0008 21/* TOS. */ 22#define NFC_IP_TOS 0x0010 23/* Protocol. */ 24#define NFC_IP_PROTO 0x0020 25/* IP options. */ 26#define NFC_IP_OPTIONS 0x0040 27/* Frag & flags. */ 28#define NFC_IP_FRAG 0x0080 29 30/* Per-protocol information: only matters if proto match. */ 31/* TCP flags. */ 32#define NFC_IP_TCPFLAGS 0x0100 33/* Source port. */ 34#define NFC_IP_SRC_PT 0x0200 35/* Dest port. */ 36#define NFC_IP_DST_PT 0x0400 37/* Something else about the proto */ 38#define NFC_IP_PROTO_UNKNOWN 0x2000 39#endif /* ! __KERNEL__ */ 40 41/* Cone NAT, Otherwise Symmetric NAT */ 42#define NFC_IP_CONE_NAT 0x0800 43#define NFC_IP_CONE_NAT_ALTERED 0x1000 44 45/* IP Hooks */ 46/* After promisc drops, checksum checks. */ 47#define NF_IP_PRE_ROUTING 0 48/* If the packet is destined for this box. */ 49#define NF_IP_LOCAL_IN 1 50/* If the packet is destined for another interface. */ 51#define NF_IP_FORWARD 2 52/* Packets coming from a local process. */ 53#define NF_IP_LOCAL_OUT 3 54/* Packets about to hit the wire. */ 55#define NF_IP_POST_ROUTING 4 56#define NF_IP_NUMHOOKS 5 57 58enum nf_ip_hook_priorities { 59 NF_IP_PRI_FIRST = INT_MIN, 60 NF_IP_PRI_CONNTRACK_DEFRAG = -400, 61 NF_IP_PRI_RAW = -300, 62 NF_IP_PRI_SELINUX_FIRST = -225, 63 NF_IP_PRI_CONNTRACK = -200, 64 NF_IP_PRI_MANGLE = -150, 65 NF_IP_PRI_NAT_DST = -100, 66 NF_IP_PRI_FILTER = 0, 67 NF_IP_PRI_NAT_SRC = 100, 68 NF_IP_PRI_SELINUX_LAST = 225, 69 NF_IP_PRI_CONNTRACK_HELPER = INT_MAX - 2, 70 NF_IP_PRI_NAT_SEQ_ADJUST = INT_MAX - 1, 71 NF_IP_PRI_CONNTRACK_CONFIRM = INT_MAX, 72 NF_IP_PRI_LAST = INT_MAX, 73}; 74 75/* Arguments for setsockopt SOL_IP: */ 76/* 2.0 firewalling went from 64 through 71 (and +256, +512, etc). */ 77/* 2.2 firewalling (+ masq) went from 64 through 76 */ 78/* 2.4 firewalling went 64 through 67. */ 79#define SO_ORIGINAL_DST 80 80 81#ifdef __KERNEL__ 82extern int ip_route_me_harder(struct sk_buff **pskb, unsigned addr_type); 83extern int ip_xfrm_me_harder(struct sk_buff **pskb); 84extern __sum16 nf_ip_checksum(struct sk_buff *skb, unsigned int hook, 85 unsigned int dataoff, u_int8_t protocol); 86#endif /*__KERNEL__*/ 87 88#endif /*__LINUX_IP_NETFILTER_H*/ 89