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/* Header file for kernel module to match connection tracking information.
* GPL (C) 2001 Marc Boucher (marc@mbsi.ca).
*/
#ifndef _IPT_CONNTRACK_H
#define _IPT_CONNTRACK_H
#include <linux/netfilter/nf_conntrack_common.h>
/* backwards compatibility crap. only exists in userspace - HW */
#include <linux/version.h>
#ifndef KERNEL_VERSION
#define KERNEL_VERSION(a,b,c) (((a) << 16) | ((b) << 8) | (c))
#endif
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,4,18)) || !defined IPS_EXPECTED
#define IPS_EXPECTED (1 << 0)
#define IPS_SEEN_REPLY (1 << 1)
#define IPS_ASSURED (1 << 2)
#define IP_CT_DIR_ORIGINAL 0
#define IP_CT_DIR_REPLY 1
#define IP_CT_DIR_MAX 2
#endif
#define IPT_CONNTRACK_STATE_BIT(ctinfo) (1 << ((ctinfo)%IP_CT_IS_REPLY+1))
#define IPT_CONNTRACK_STATE_INVALID (1 << 0)
#define IPT_CONNTRACK_STATE_SNAT (1 << (IP_CT_NUMBER + 1))
#define IPT_CONNTRACK_STATE_DNAT (1 << (IP_CT_NUMBER + 2))
#define IPT_CONNTRACK_STATE_UNTRACKED (1 << (IP_CT_NUMBER + 3))
/* flags, invflags: */
#define IPT_CONNTRACK_STATE 0x01
#define IPT_CONNTRACK_PROTO 0x02
#define IPT_CONNTRACK_ORIGSRC 0x04
#define IPT_CONNTRACK_ORIGDST 0x08
#define IPT_CONNTRACK_REPLSRC 0x10
#define IPT_CONNTRACK_REPLDST 0x20
#define IPT_CONNTRACK_STATUS 0x40
#define IPT_CONNTRACK_EXPIRES 0x80
/* This is exposed to userspace, so remains frozen in time. */
struct ip_conntrack_old_tuple
{
struct {
u_int32_t ip;
union {
u_int16_t all;
} u;
} src;
struct {
u_int32_t ip;
union {
u_int16_t all;
} u;
/* The protocol. */
u_int16_t protonum;
} dst;
};
struct ipt_conntrack_info
{
unsigned int statemask, statusmask;
struct ip_conntrack_old_tuple tuple[IP_CT_DIR_MAX];
struct in_addr sipmsk[IP_CT_DIR_MAX], dipmsk[IP_CT_DIR_MAX];
unsigned long expires_min, expires_max;
/* Flags word */
u_int8_t flags;
/* Inverse flags */
u_int8_t invflags;
};
#endif /*_IPT_CONNTRACK_H*/
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