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/config.h> 9#include <linux/netfilter.h> 10 11/* IP Cache bits. */ 12/* Src IP address. */ 13#define NFC_IP_SRC 0x0001 14/* Dest IP address. */ 15#define NFC_IP_DST 0x0002 16/* Input device. */ 17#define NFC_IP_IF_IN 0x0004 18/* Output device. */ 19#define NFC_IP_IF_OUT 0x0008 20/* TOS. */ 21#define NFC_IP_TOS 0x0010 22/* Protocol. */ 23#define NFC_IP_PROTO 0x0020 24/* IP options. */ 25#define NFC_IP_OPTIONS 0x0040 26/* Frag & flags. */ 27#define NFC_IP_FRAG 0x0080 28 29/* Per-protocol information: only matters if proto match. */ 30/* TCP flags. */ 31#define NFC_IP_TCPFLAGS 0x0100 32/* Source port. */ 33#define NFC_IP_SRC_PT 0x0200 34/* Dest port. */ 35#define NFC_IP_DST_PT 0x0400 36/* Something else about the proto */ 37#define NFC_IP_PROTO_UNKNOWN 0x2000 38 39/* IP Hooks */ 40/* After promisc drops, checksum checks. */ 41#define NF_IP_PRE_ROUTING 0 42/* If the packet is destined for this box. */ 43#define NF_IP_LOCAL_IN 1 44/* If the packet is destined for another interface. */ 45#define NF_IP_FORWARD 2 46/* Packets coming from a local process. */ 47#define NF_IP_LOCAL_OUT 3 48/* Packets about to hit the wire. */ 49#define NF_IP_POST_ROUTING 4 50#define NF_IP_NUMHOOKS 5 51 52enum nf_ip_hook_priorities { 53 NF_IP_PRI_FIRST = INT_MIN, 54 NF_IP_PRI_CONNTRACK = -200, 55 NF_IP_PRI_MANGLE = -150, 56 NF_IP_PRI_NAT_DST = -100, 57 NF_IP_PRI_FILTER = 0, 58 NF_IP_PRI_NAT_SRC = 100, 59 NF_IP_PRI_LAST = INT_MAX, 60}; 61 62/* Arguments for setsockopt SOL_IP: */ 63/* 2.0 firewalling went from 64 through 71 (and +256, +512, etc). */ 64/* 2.2 firewalling (+ masq) went from 64 through 76 */ 65/* 2.4 firewalling went 64 through 67. */ 66#define SO_ORIGINAL_DST 80 67 68#ifdef __KERNEL__ 69#ifdef CONFIG_NETFILTER_DEBUG 70void nf_debug_ip_local_deliver(struct sk_buff *skb); 71void nf_debug_ip_loopback_xmit(struct sk_buff *newskb); 72void nf_debug_ip_finish_output2(struct sk_buff *skb); 73#endif /*CONFIG_NETFILTER_DEBUG*/ 74 75extern int ip_route_me_harder(struct sk_buff **pskb); 76#endif /*__KERNEL__*/ 77 78#endif /*__LINUX_IP_NETFILTER_H*/ 79