[deliverable/linux.git] / include / linux / netfilter_ipv4.h

#ifndef __LINUX_IP_NETFILTER_H
#define __LINUX_IP_NETFILTER_H

/* IPv4-specific defines for netfilter. 
 * (C)1998 Rusty Russell -- This code is GPL.
 */

#include <linux/netfilter.h>

/* only for userspace compatibility */
#ifndef __KERNEL__

#include <limits.h> /* for INT_MIN, INT_MAX */

/* IP Cache bits. */
/* Src IP address. */
#define NFC_IP_SRC		0x0001
/* Dest IP address. */
#define NFC_IP_DST		0x0002
/* Input device. */
#define NFC_IP_IF_IN		0x0004
/* Output device. */
#define NFC_IP_IF_OUT		0x0008
/* TOS. */
#define NFC_IP_TOS		0x0010
/* Protocol. */
#define NFC_IP_PROTO		0x0020
/* IP options. */
#define NFC_IP_OPTIONS		0x0040
/* Frag & flags. */
#define NFC_IP_FRAG		0x0080

/* Per-protocol information: only matters if proto match. */
/* TCP flags. */
#define NFC_IP_TCPFLAGS		0x0100
/* Source port. */
#define NFC_IP_SRC_PT		0x0200
/* Dest port. */
#define NFC_IP_DST_PT		0x0400
/* Something else about the proto */
#define NFC_IP_PROTO_UNKNOWN	0x2000

/* IP Hooks */
/* After promisc drops, checksum checks. */
#define NF_IP_PRE_ROUTING	0
/* If the packet is destined for this box. */
#define NF_IP_LOCAL_IN		1
/* If the packet is destined for another interface. */
#define NF_IP_FORWARD		2
/* Packets coming from a local process. */
#define NF_IP_LOCAL_OUT		3
/* Packets about to hit the wire. */
#define NF_IP_POST_ROUTING	4
#define NF_IP_NUMHOOKS		5
#endif /* ! __KERNEL__ */

enum nf_ip_hook_priorities {
	NF_IP_PRI_FIRST = INT_MIN,
	NF_IP_PRI_CONNTRACK_DEFRAG = -400,
	NF_IP_PRI_RAW = -300,
	NF_IP_PRI_SELINUX_FIRST = -225,
	NF_IP_PRI_CONNTRACK = -200,
	NF_IP_PRI_MANGLE = -150,
	NF_IP_PRI_NAT_DST = -100,
	NF_IP_PRI_FILTER = 0,
	NF_IP_PRI_SECURITY = 50,
	NF_IP_PRI_NAT_SRC = 100,
	NF_IP_PRI_SELINUX_LAST = 225,
	NF_IP_PRI_CONNTRACK_HELPER = 300,
	NF_IP_PRI_CONNTRACK_CONFIRM = INT_MAX,
	NF_IP_PRI_LAST = INT_MAX,
};

/* Arguments for setsockopt SOL_IP: */
/* 2.0 firewalling went from 64 through 71 (and +256, +512, etc). */
/* 2.2 firewalling (+ masq) went from 64 through 76 */
/* 2.4 firewalling went 64 through 67. */
#define SO_ORIGINAL_DST 80

#ifdef __KERNEL__
extern int ip_route_me_harder(struct sk_buff *skb, unsigned addr_type);
extern __sum16 nf_ip_checksum(struct sk_buff *skb, unsigned int hook,
				   unsigned int dataoff, u_int8_t protocol);
#endif /*__KERNEL__*/

#endif /*__LINUX_IP_NETFILTER_H*/
Commit	Line	Data
1da177e4 LT	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
1da177e4 LT	8	#include <linux/netfilter.h>
1da177e4 LT	9
6869c4d8 HW	10	/* only for userspace compatibility */
6869c4d8 HW	11	#ifndef __KERNEL__
598aaff2 BH	12
	13	#include <limits.h> /* for INT_MIN, INT_MAX */
	14
1da177e4 LT	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
6e23ae2a	55	#endif /* ! __KERNEL__ */
1da177e4 LT	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,
1da177e4 LT	63	NF_IP_PRI_MANGLE = -150,
1da177e4 LT	64	NF_IP_PRI_NAT_DST = -100,
1da177e4	65	NF_IP_PRI_FILTER = 0,
560ee653	66	NF_IP_PRI_SECURITY = 50,
1da177e4 LT	67	NF_IP_PRI_NAT_SRC = 100,
1da177e4 LT	68	NF_IP_PRI_SELINUX_LAST = 225,
12f7a505	69	NF_IP_PRI_CONNTRACK_HELPER = 300,
e281e3ac	70	NF_IP_PRI_CONNTRACK_CONFIRM = INT_MAX,
1da177e4 LT	71	NF_IP_PRI_LAST = INT_MAX,
	72	};
	73
	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
	79
	80	#ifdef __KERNEL__
3db05fea	81	extern int ip_route_me_harder(struct sk_buff *skb, unsigned addr_type);
b51655b9	82	extern __sum16 nf_ip_checksum(struct sk_buff *skb, unsigned int hook,
422c346f	83	unsigned int dataoff, u_int8_t protocol);
1da177e4 LT	84	#endif /__KERNEL__/
	85
	86	#endif /__LINUX_IP_NETFILTER_H/