root/include/linux/netfilter/xt_conntrack.h

INCLUDED FROM

/* Header file for kernel module to match connection tracking information.
 * GPL (C) 2001  Marc Boucher (marc@mbsi.ca).
 */

#ifndef _XT_CONNTRACK_H
#define _XT_CONNTRACK_H

#include <linux/netfilter/nf_conntrack_tuple_common.h>

#define XT_CONNTRACK_STATE_BIT(ctinfo) (1 << ((ctinfo)%IP_CT_IS_REPLY+1))
#define XT_CONNTRACK_STATE_INVALID (1 << 0)

#define XT_CONNTRACK_STATE_SNAT (1 << (IP_CT_NUMBER + 1))
#define XT_CONNTRACK_STATE_DNAT (1 << (IP_CT_NUMBER + 2))
#define XT_CONNTRACK_STATE_UNTRACKED (1 << (IP_CT_NUMBER + 3))

/* flags, invflags: */
enum {
        XT_CONNTRACK_STATE        = 1 << 0,
        XT_CONNTRACK_PROTO        = 1 << 1,
        XT_CONNTRACK_ORIGSRC      = 1 << 2,
        XT_CONNTRACK_ORIGDST      = 1 << 3,
        XT_CONNTRACK_REPLSRC      = 1 << 4,
        XT_CONNTRACK_REPLDST      = 1 << 5,
        XT_CONNTRACK_STATUS       = 1 << 6,
        XT_CONNTRACK_EXPIRES      = 1 << 7,
        XT_CONNTRACK_ORIGSRC_PORT = 1 << 8,
        XT_CONNTRACK_ORIGDST_PORT = 1 << 9,
        XT_CONNTRACK_REPLSRC_PORT = 1 << 10,
        XT_CONNTRACK_REPLDST_PORT = 1 << 11,
        XT_CONNTRACK_DIRECTION    = 1 << 12,
};

/* This is exposed to userspace, so remains frozen in time. */
struct ip_conntrack_old_tuple
{
        struct {
                __be32 ip;
                union {
                        __u16 all;
                } u;
        } src;

        struct {
                __be32 ip;
                union {
                        __u16 all;
                } u;

                /* The protocol. */
                __u16 protonum;
        } dst;
};

struct xt_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;
};

struct xt_conntrack_mtinfo1 {
        union nf_inet_addr origsrc_addr, origsrc_mask;
        union nf_inet_addr origdst_addr, origdst_mask;
        union nf_inet_addr replsrc_addr, replsrc_mask;
        union nf_inet_addr repldst_addr, repldst_mask;
        u_int32_t expires_min, expires_max;
        u_int16_t l4proto;
        __be16 origsrc_port, origdst_port;
        __be16 replsrc_port, repldst_port;
        u_int16_t match_flags, invert_flags;
        u_int8_t state_mask, status_mask;
};

#endif /*_XT_CONNTRACK_H*/