/*
 * Copyright (C) 1993-2001 by Darren Reed.
 *
 * See the IPFILTER.LICENCE file for details on licencing.
 *
 * @(#)ip_frag.h        1.5 3/24/96
 * $Id: ip_frag.h,v 2.23.2.2 2005/06/10 18:02:37 darrenr Exp $
 *
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#ifndef __IP_FRAG_H__
#define __IP_FRAG_H__

#define IPFT_SIZE       257

typedef struct  ipfr    {
        struct  ipfr    *ipfr_hnext, **ipfr_hprev;
        struct  ipfr    *ipfr_next, **ipfr_prev;
        void    *ipfr_data;
        void    *ipfr_ifp;
        i6addr_t        ipfr_src;
        i6addr_t        ipfr_dst;
        u_32_t  ipfr_optmsk;
        u_short ipfr_secmsk;
        u_short ipfr_auth;
        u_32_t  ipfr_id;
        u_32_t  ipfr_p;
        u_32_t  ipfr_tos;
        u_32_t  ipfr_pass;
        u_short ipfr_off;
        u_long  ipfr_ttl;
        u_char  ipfr_seen0;
        frentry_t *ipfr_rule;
        int     ipfr_ref;
} ipfr_t;

typedef struct  ipfrstat {
        u_long  ifs_exists;     /* add & already exists */
        u_long  ifs_nomem;
        u_long  ifs_new;
        u_long  ifs_hits;
        u_long  ifs_expire;
        u_long  ifs_inuse;
        u_long  ifs_retrans0;
        u_long  ifs_short;
        struct  ipfr    **ifs_table;
        struct  ipfr    **ifs_nattab;
} ipfrstat_t;

#define IPFR_CMPSZ      (offsetof(ipfr_t, ipfr_tos) - \
                         offsetof(ipfr_t, ipfr_ifp))

extern  int     fr_fraginit __P((ipf_stack_t *));
extern  void    fr_fragunload __P((ipf_stack_t *));
extern  ipfrstat_t      *fr_fragstats __P((ipf_stack_t *));

extern  int     fr_newfrag __P((fr_info_t *, u_32_t));
extern  frentry_t *fr_knownfrag __P((fr_info_t *, u_32_t *));

extern  int     fr_nat_newfrag __P((fr_info_t *, u_32_t, struct nat *));
extern  nat_t   *fr_nat_knownfrag __P((fr_info_t *));

extern  int     fr_ipid_newfrag __P((fr_info_t *, u_32_t));
extern  u_32_t  fr_ipid_knownfrag __P((fr_info_t *));
extern  void    fr_fragderef __P((ipfr_t **, ipfrwlock_t *, ipf_stack_t *));

extern  void    fr_forget __P((void *, ipf_stack_t *));
extern  void    fr_forgetnat __P((void *, ipf_stack_t *));
extern  void    fr_fragclear __P((ipf_stack_t *));
extern  void    fr_fragexpire __P((ipf_stack_t *));
extern  int     fr_nextfrag __P((ipftoken_t *, ipfgeniter_t *, ipfr_t **, \
                                 ipfr_t ***, ipfrwlock_t *, ipf_stack_t *));

#if     defined(_KERNEL) && ((BSD >= 199306) || defined(SOLARIS) || \
        defined(__sgi) || defined(__osf__) || \
        (defined(__sgi) && (IRIX >= 60500)))
# if defined(SOLARIS2) && (SOLARIS2 < 7)
extern  void    fr_slowtimer __P((void *));
# else
extern  void    fr_slowtimer __P((void *));
# endif
#else
# if defined(linux) && defined(_KERNEL)
extern  void    fr_slowtimer __P((long));
# else
extern  int     fr_slowtimer __P((void *));
# endif
#endif

#endif  /* __IP_FRAG_H__ */