/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */

/* IPv4-specific defines for netfilter. 

 * (C)1998 Rusty Russell -- This code is GPL.

 */

#ifndef __LINUX_IP_NETFILTER_H

#define __LINUX_IP_NETFILTER_H

#include <linux/netfilter.h>

/* only for userspace compatibility */

#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

enum nf_ip_hook_priorities {

	NF_IP_PRI_FIRST = INT_MIN,

	NF_IP_PRI_RAW_BEFORE_DEFRAG = -450,

	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

#endif /* __LINUX_IP_NETFILTER_H */