[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/config.h>
#include <linux/netfilter.h>

/* 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

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_BRIDGE_SABOTAGE_FORWARD = -175,
	NF_IP_PRI_MANGLE = -150,
	NF_IP_PRI_NAT_DST = -100,
	NF_IP_PRI_BRIDGE_SABOTAGE_LOCAL_OUT = -50,
	NF_IP_PRI_FILTER = 0,
	NF_IP_PRI_NAT_SRC = 100,
	NF_IP_PRI_SELINUX_LAST = 225,
	NF_IP_PRI_CONNTRACK_HELPER = INT_MAX - 2,
	NF_IP_PRI_NAT_SEQ_ADJUST = INT_MAX - 1,
	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 **pskb);

/* Call this before modifying an existing IP packet: ensures it is
   modifiable and linear to the point you care about (writable_len).
   Returns true or false. */
extern int skb_ip_make_writable(struct sk_buff **pskb,
				unsigned int writable_len);
#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
	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
	52	enum nf_ip_hook_priorities {
	53	NF_IP_PRI_FIRST = INT_MIN,
	54	NF_IP_PRI_CONNTRACK_DEFRAG = -400,
	55	NF_IP_PRI_RAW = -300,
	56	NF_IP_PRI_SELINUX_FIRST = -225,
	57	NF_IP_PRI_CONNTRACK = -200,
	58	NF_IP_PRI_BRIDGE_SABOTAGE_FORWARD = -175,
	59	NF_IP_PRI_MANGLE = -150,
	60	NF_IP_PRI_NAT_DST = -100,
	61	NF_IP_PRI_BRIDGE_SABOTAGE_LOCAL_OUT = -50,
	62	NF_IP_PRI_FILTER = 0,
	63	NF_IP_PRI_NAT_SRC = 100,
	64	NF_IP_PRI_SELINUX_LAST = 225,
e281e3ac PM	65	NF_IP_PRI_CONNTRACK_HELPER = INT_MAX - 2,
	66	NF_IP_PRI_NAT_SEQ_ADJUST = INT_MAX - 1,
	67	NF_IP_PRI_CONNTRACK_CONFIRM = INT_MAX,
1da177e4 LT	68	NF_IP_PRI_LAST = INT_MAX,
	69	};
	70
	71	/* Arguments for setsockopt SOL_IP: */
	72	/* 2.0 firewalling went from 64 through 71 (and +256, +512, etc). */
	73	/* 2.2 firewalling (+ masq) went from 64 through 76 */
	74	/* 2.4 firewalling went 64 through 67. */
	75	#define SO_ORIGINAL_DST 80
	76
	77	#ifdef __KERNEL__
1da177e4 LT	78	extern int ip_route_me_harder(struct sk_buff **pskb);
	79
	80	/* Call this before modifying an existing IP packet: ensures it is
	81	modifiable and linear to the point you care about (writable_len).
	82	Returns true or false. */
	83	extern int skb_ip_make_writable(struct sk_buff **pskb,
	84	unsigned int writable_len);
	85	#endif /__KERNEL__/
	86
	87	#endif /__LINUX_IP_NETFILTER_H/