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//==========================================================================

//

//      include/netinet/ip_fil.h

//

//      

//

//==========================================================================

//####BSDCOPYRIGHTBEGIN####

//

// -------------------------------------------

//

// Portions of this software may have been derived from OpenBSD or other sources,

// and are covered by the appropriate copyright disclaimers included herein.

//

// -------------------------------------------

//

//####BSDCOPYRIGHTEND####

//==========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):    gthomas

// Contributors: gthomas

// Date:         2000-01-10

// Purpose:      

// Description:  

//              

//

//####DESCRIPTIONEND####

//

//==========================================================================

/* $OpenBSD: ip_fil.h,v 1.13 1999/12/15 05:20:21 kjell Exp $ */

/*

 * Copyright (C) 1993-1998 by Darren Reed.

 *

 * Redistribution and use in source and binary forms are permitted

 * provided that this notice is preserved and due credit is given

 * to the original author and the contributors.

 *

 * @(#)ip_fil.h 1.35 6/5/96

 */

#ifndef _NETINET_IP_FIL_H__

#define _NETINET_IP_FIL_H__

/*

 * Pathnames for various IP Filter control devices.  Used by LKM

 * and userland, so defined here.

 */

#define IPNAT_NAME      "/dev/ipnat"

#define IPSTATE_NAME    "/dev/ipstate"

#define IPAUTH_NAME     "/dev/ipauth"

#ifndef SOLARIS

# define SOLARIS (defined(sun) && (defined(__svr4__) || defined(__SVR4)))

#endif

#if defined(KERNEL) && !defined(_KERNEL)

# define        _KERNEL

#endif

#ifndef __P

# ifdef __STDC__

#  define       __P(x)  x

# else

#  define       __P(x)  ()

# endif

#endif

#if defined(__STDC__) || defined(__GNUC__)

# define        SIOCADAFR       _IOW('r', 60, struct frentry)

# define        SIOCRMAFR       _IOW('r', 61, struct frentry)

# define        SIOCSETFF       _IOW('r', 62, u_int)

# define        SIOCGETFF       _IOR('r', 63, u_int)

# define        SIOCGETFS       _IOR('r', 64, struct friostat)

# define        SIOCIPFFL       _IOWR('r', 65, int)

# define        SIOCIPFFB       _IOR('r', 66, int)

# define        SIOCADIFR       _IOW('r', 67, struct frentry)

# define        SIOCRMIFR       _IOW('r', 68, struct frentry)

# define        SIOCSWAPA       _IOR('r', 69, u_int)

# define        SIOCINAFR       _IOW('r', 70, struct frentry)

# define        SIOCINIFR       _IOW('r', 71, struct frentry)

# define        SIOCFRENB       _IOW('r', 72, u_int)

# define        SIOCFRSYN       _IOW('r', 73, u_int)

# define        SIOCFRZST       _IOWR('r', 74, struct friostat)

# define        SIOCZRLST       _IOWR('r', 75, struct frentry)

# define        SIOCAUTHW       _IOWR('r', 76, struct fr_info)

# define        SIOCAUTHR       _IOWR('r', 77, struct fr_info)

# define        SIOCATHST       _IOWR('r', 78, struct fr_authstat)

#else

# define        SIOCADAFR       _IOW(r, 60, struct frentry)

# define        SIOCRMAFR       _IOW(r, 61, struct frentry)

# define        SIOCSETFF       _IOW(r, 62, u_int)

# define        SIOCGETFF       _IOR(r, 63, u_int)

# define        SIOCGETFS       _IOR(r, 64, struct friostat)

# define        SIOCIPFFL       _IOWR(r, 65, int)

# define        SIOCIPFFB       _IOR(r, 66, int)

# define        SIOCADIFR       _IOW(r, 67, struct frentry)

# define        SIOCRMIFR       _IOW(r, 68, struct frentry)

# define        SIOCSWAPA       _IOR(r, 69, u_int)

# define        SIOCINAFR       _IOW(r, 70, struct frentry)

# define        SIOCINIFR       _IOW(r, 71, struct frentry)

# define        SIOCFRENB       _IOW(r, 72, u_int)

# define        SIOCFRSYN       _IOW(r, 73, u_int)

# define        SIOCFRZST       _IOWR(r, 74, struct friostat)

# define        SIOCZRLST       _IOWR(r, 75, struct frentry)

# define        SIOCAUTHW       _IOWR(r, 76, struct fr_info)

# define        SIOCAUTHR       _IOWR(r, 77, struct fr_info)

# define        SIOCATHST       _IOWR(r, 78, struct fr_authstat)

#endif

#define SIOCADDFR       SIOCADAFR

#define SIOCDELFR       SIOCRMAFR

#define SIOCINSFR       SIOCINAFR

typedef struct  fr_ip   {

        u_char  fi_v:4;         /* IP version */

        u_char  fi_fl:4;        /* packet flags */

        u_char  fi_tos;         /* IP packet TOS */

        u_char  fi_ttl;         /* IP packet TTL */

        u_char  fi_p;           /* IP packet protocol */

        struct  in_addr fi_src; /* source address from packet */

        struct  in_addr fi_dst; /* destination address from packet */

        u_32_t  fi_optmsk;      /* bitmask composed from IP options */

        u_short fi_secmsk;      /* bitmask composed from IP security options */

        u_short fi_auth;        /* authentication code from IP sec. options */

} fr_ip_t;

#define FI_OPTIONS      (FF_OPTIONS >> 24)

#define FI_TCPUDP       (FF_TCPUDP >> 24)       /* TCP/UCP implied comparison*/

#define FI_FRAG         (FF_FRAG >> 24)

#define FI_SHORT        (FF_SHORT >> 24)

#define FI_CMP          (FI_OPTIONS|FI_TCPUDP|FI_SHORT)

/*

 * These are both used by the state and NAT code to indicate that one port or

 * the other should be treated as a wildcard.

 */

#define FI_W_SPORT      0x00000100

#define FI_W_DPORT      0x00000200

#define FI_WILD         (FI_W_SPORT|FI_W_DPORT)

typedef struct  fr_info {

        void    *fin_ifp;               /* interface packet is `on' */

        struct  fr_ip   fin_fi;         /* IP Packet summary */

        u_short fin_data[2];            /* TCP/UDP ports, ICMP code/type */

        u_char  fin_out;                /* in or out ? 1 == out, 0 == in */

        u_char  fin_rev;                /* state only: 1 = reverse */

        u_short fin_hlen;               /* length of IP header in bytes */

        u_char  fin_tcpf;               /* TCP header flags (SYN, ACK, etc) */

        /* From here on is packet specific */

        u_char  fin_icode;              /* ICMP error to return */

        u_short fin_rule;               /* rule # last matched */

        u_short fin_group;              /* group number, -1 for none */

        struct  frentry *fin_fr;        /* last matching rule */

        char    *fin_dp;                /* start of data past IP header */

        u_short fin_dlen;               /* length of data portion of packet */

        u_short fin_id;                 /* IP packet id field */

        void    *fin_mp;                /* pointer to pointer to mbuf */

#if SOLARIS && defined(_KERNEL)

        void    *fin_qfm;               /* pointer to mblk where pkt starts */

        void    *fin_qif;

#endif

} fr_info_t;

/*

 * Size for compares on fr_info structures

 */

#define FI_CSIZE        offsetof(fr_info_t, fin_icode)

/*

 * Size for copying cache fr_info structure

 */

#define FI_COPYSIZE     offsetof(fr_info_t, fin_dp)

typedef struct  frdest  {

        void    *fd_ifp;

        struct  in_addr fd_ip;

        char    fd_ifname[IFNAMSIZ];

} frdest_t;

typedef struct  frentry {

        struct  frentry *fr_next;

        u_short fr_group;       /* group to which this rule belongs */

        u_short fr_grhead;      /* group # which this rule starts */

        struct  frentry *fr_grp;

        int     fr_ref;         /* reference count - for grouping */

        void    *fr_ifa;

#if BSD >= 199306

        void    *fr_oifa;

#endif

        /*

         * These are only incremented when a packet  matches this rule and

         * it is the last match

         */

        U_QUAD_T        fr_hits;

        U_QUAD_T        fr_bytes;

        /*

         * Fields after this may not change whilst in the kernel.

         */

        struct  fr_ip   fr_ip;

        struct  fr_ip   fr_mip; /* mask structure */

        u_char  fr_tcpfm;       /* tcp flags mask */

        u_char  fr_tcpf;        /* tcp flags */

        u_short fr_icmpm;       /* data for ICMP packets (mask) */

        u_short fr_icmp;

        u_char  fr_scmp;        /* data for port comparisons */

        u_char  fr_dcmp;

        u_short fr_dport;

        u_short fr_sport;

        u_short fr_stop;        /* top port for <> and >< */

        u_short fr_dtop;        /* top port for <> and >< */

        u_32_t  fr_flags;       /* per-rule flags && options (see below) */

        u_short fr_skip;        /* # of rules to skip */

        u_short fr_loglevel;    /* syslog log facility + priority */

        int     (*fr_func) __P((int, ip_t *, fr_info_t *));     /* call this function */

        char    fr_icode;       /* return ICMP code */

        char    fr_ifname[IFNAMSIZ];

#if BSD >= 199306

        char    fr_oifname[IFNAMSIZ];

#endif

        struct  frdest  fr_tif; /* "to" interface */

        struct  frdest  fr_dif; /* duplicate packet interfaces */

} frentry_t;

#define fr_proto        fr_ip.fi_p

#define fr_ttl          fr_ip.fi_ttl

#define fr_tos          fr_ip.fi_tos

#define fr_dst          fr_ip.fi_dst

#define fr_src          fr_ip.fi_src

#define fr_dmsk         fr_mip.fi_dst

#define fr_smsk         fr_mip.fi_src

#ifndef offsetof

#define offsetof(t,m)   (int)((&((t *)0L)->m))

#endif

#define FR_CMPSIZ       (sizeof(struct frentry) - offsetof(frentry_t, fr_ip))

/*

 * fr_flags

 */

#define FR_BLOCK        0x00001 /* do not allow packet to pass */

#define FR_PASS         0x00002 /* allow packet to pass */

#define FR_OUTQUE       0x00004 /* outgoing packets */

#define FR_INQUE        0x00008 /* ingoing packets */

#define FR_LOG          0x00010 /* Log */

#define FR_LOGB         0x00011 /* Log-fail */

#define FR_LOGP         0x00012 /* Log-pass */

#define FR_LOGBODY      0x00020 /* Log the body */

#define FR_LOGFIRST     0x00040 /* Log the first byte if state held */

#define FR_RETRST       0x00080 /* Return TCP RST packet - reset connection */

#define FR_RETICMP      0x00100 /* Return ICMP unreachable packet */

#define FR_FAKEICMP     0x00180 /* Return ICMP unreachable with fake source */

#define FR_NOMATCH      0x00200 /* no match occured */

#define FR_ACCOUNT      0x00400 /* count packet bytes */

#define FR_KEEPFRAG     0x00800 /* keep fragment information */

#define FR_KEEPSTATE    0x01000 /* keep `connection' state information */

#define FR_INACTIVE     0x02000

#define FR_QUICK        0x04000 /* match & stop processing list */

#define FR_FASTROUTE    0x08000 /* bypass normal routing */

#define FR_CALLNOW      0x10000 /* call another function (fr_func) if matches */

#define FR_DUP          0x20000 /* duplicate packet */

#define FR_LOGORBLOCK   0x40000 /* block the packet if it can't be logged */

#define FR_NOTSRCIP     0x80000 /* not the src IP# */

#define FR_NOTDSTIP     0x100000        /* not the dst IP# */

#define FR_AUTH         0x200000        /* use authentication */

#define FR_PREAUTH      0x400000        /* require preauthentication */

#define FR_DONTCACHE    0x800000        /* don't cache the result */

#define FR_LOGMASK      (FR_LOG|FR_LOGP|FR_LOGB)

#define FR_RETMASK      (FR_RETICMP|FR_RETRST|FR_FAKEICMP)

/*

 * These correspond to #define's for FI_* and are stored in fr_flags

 */

#define FF_OPTIONS      0x01000000

#define FF_TCPUDP       0x02000000

#define FF_FRAG         0x04000000

#define FF_SHORT        0x08000000

/*

 * recognized flags for SIOCGETFF and SIOCSETFF, and get put in fr_flags

 */

#define FF_LOGPASS      0x10000000

#define FF_LOGBLOCK     0x20000000

#define FF_LOGNOMATCH   0x40000000

#define FF_LOGGING      (FF_LOGPASS|FF_LOGBLOCK|FF_LOGNOMATCH)

#define FF_BLOCKNONIP   0x80000000      /* Solaris2 Only */

#define FR_NONE 0

#define FR_EQUAL 1

#define FR_NEQUAL 2

#define FR_LESST 3

#define FR_GREATERT 4

#define FR_LESSTE 5

#define FR_GREATERTE 6

#define FR_OUTRANGE 7

#define FR_INRANGE 8

typedef struct  filterstats {

        u_long  fr_pass;        /* packets allowed */

        u_long  fr_block;       /* packets denied */

        u_long  fr_nom;         /* packets which don't match any rule */

        u_long  fr_ppkl;        /* packets allowed and logged */

        u_long  fr_bpkl;        /* packets denied and logged */

        u_long  fr_npkl;        /* packets unmatched and logged */

        u_long  fr_pkl;         /* packets logged */

        u_long  fr_skip;        /* packets to be logged but buffer full */

        u_long  fr_ret;         /* packets for which a return is sent */

        u_long  fr_acct;        /* packets for which counting was performed */

        u_long  fr_bnfr;        /* bad attempts to allocate fragment state */

        u_long  fr_nfr;         /* new fragment state kept */

        u_long  fr_cfr;         /* add new fragment state but complete pkt */

        u_long  fr_bads;        /* bad attempts to allocate packet state */

        u_long  fr_ads;         /* new packet state kept */

        u_long  fr_chit;        /* cached hit */

        u_long  fr_tcpbad;      /* TCP checksum check failures */

        u_long  fr_pull[2];     /* good and bad pullup attempts */

#if SOLARIS

        u_long  fr_notdata;     /* PROTO/PCPROTO that have no data */

        u_long  fr_nodata;      /* mblks that have no data */

        u_long  fr_bad;         /* bad IP packets to the filter */

        u_long  fr_notip;       /* packets passed through no on ip queue */

        u_long  fr_drop;        /* packets dropped - no info for them! */

#endif

} filterstats_t;

/*

 * For SIOCGETFS

 */

typedef struct  friostat        {

        struct  filterstats     f_st[2];

        struct  frentry         *f_fin[2];

        struct  frentry         *f_fout[2];

        struct  frentry         *f_acctin[2];

        struct  frentry         *f_acctout[2];

        struct  frentry         *f_auth;

        struct  frgroup         *f_groups[3][2];

        u_long  f_froute[2];

        int     f_active;       /* 1 or 0 - active rule set */

        int     f_defpass;      /* default pass - from fr_pass */

        int     f_running;      /* 1 if running, else 0 */

        int     f_logging;      /* 1 if enabled, else 0 */

        char    f_version[32];  /* version string */

} friostat_t;

typedef struct  optlist {

        u_short ol_val;

        int     ol_bit;

} optlist_t;

/*

 * Group list structure.

 */

typedef struct frgroup {

        u_short fg_num;

        struct  frgroup *fg_next;

        struct  frentry *fg_head;

        struct  frentry **fg_start;

} frgroup_t;

/*

 * Log structure.  Each packet header logged is prepended by one of these.

 * Following this in the log records read from the device will be an ipflog

 * structure which is then followed by any packet data.

 */

typedef struct  iplog   {

        u_32_t  ipl_magic;

        u_int   ipl_count;

        u_long  ipl_sec;

        u_long  ipl_usec;

        size_t  ipl_dsize;

        struct  iplog   *ipl_next;

} iplog_t;

#define IPL_MAGIC 0x49504c4d /* 'IPLM' */

typedef struct  ipflog  {

#if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199603)) || \

        (defined(OpenBSD) && (OpenBSD >= 199603))

        u_char  fl_ifname[IFNAMSIZ];

#else

        u_int   fl_unit;

        u_char  fl_ifname[4];

#endif

        u_char  fl_plen;        /* extra data after hlen */

        u_char  fl_hlen;        /* length of IP headers saved */

        u_short fl_rule;        /* assume never more than 64k rules, total */

        u_short fl_group;

        u_short fl_loglevel;    /* syslog log level */

        u_32_t  fl_flags;

        u_32_t  fl_lflags;

} ipflog_t;

#if !defined(__OpenBSD__)

# ifndef        ICMP_UNREACH_FILTER

#  define       ICMP_UNREACH_FILTER     13

# endif

#endif

#ifndef IPF_LOGGING

# define        IPF_LOGGING     0

#endif

#ifndef IPF_DEFAULT_PASS

# define        IPF_DEFAULT_PASS        FR_PASS

#endif

#define IPMINLEN(i, h)  ((i)->ip_len >= ((i)->ip_hl * 4 + sizeof(struct h)))

#define IPLLOGSIZE      8192

/*

 * Device filenames for reading log information.  Use ipf on Solaris2 because

 * ipl is already a name used by something else.

 */

#ifndef IPL_NAME

# if    SOLARIS

#  define       IPL_NAME        "/dev/ipf"

# else

#  define       IPL_NAME        "/dev/ipl"

# endif

#endif

#define IPL_NAT         IPNAT_NAME

#define IPL_STATE       IPSTATE_NAME

#define IPL_AUTH        IPAUTH_NAME

#define IPL_LOGIPF      0        /* Minor device #'s for accessing logs */

#define IPL_LOGNAT      1

#define IPL_LOGSTATE    2

#define IPL_LOGAUTH     3

#define IPL_LOGMAX      3

#if !defined(CDEV_MAJOR) && defined (__FreeBSD_version) && \

    (__FreeBSD_version >= 220000)

# define        CDEV_MAJOR      79

#endif

/*

 * Post NetBSD 1.2 has the PFIL interface for packet filters.  This turns

 * on those hooks.  We don't need any special mods in non-IP Filter code

 * with this!

 */

#if (defined(NetBSD) && (NetBSD > 199609) && (NetBSD <= 1991011)) || \

    (defined(NetBSD1_2) && NetBSD1_2 > 1)

# if (NetBSD >= 199905)

#  define PFIL_HOOKS

# endif

# ifdef PFIL_HOOKS

#  define NETBSD_PF

# endif

#endif

#ifndef _KERNEL

extern  int     fr_check __P((ip_t *, int, void *, int, mb_t **));

extern  int     (*fr_checkp) __P((ip_t *, int, void *, int, mb_t **));

extern  int     send_reset __P((ip_t *, struct ifnet *));

extern  int     icmp_error __P((ip_t *, struct ifnet *));

extern  int     ipf_log __P((void));

extern  int     ipfr_fastroute __P((ip_t *, fr_info_t *, frdest_t *));

extern  struct  ifnet *get_unit __P((char *));

# if defined(__NetBSD__) || defined(__OpenBSD__) || \

          (_BSDI_VERSION >= 199701) || (__FreeBSD_version >= 300000)

extern  int     iplioctl __P((dev_t, u_long, caddr_t, int));

# else

extern  int     iplioctl __P((dev_t, int, caddr_t, int));

# endif

extern  int     iplopen __P((dev_t, int));

extern  int     iplclose __P((dev_t, int));

#else /* #ifndef _KERNEL */

# if defined(__NetBSD__) && defined(PFIL_HOOKS)

extern  void    ipfilterattach __P((int));

# endif

#if !defined(__OpenBSD__)

/*

 * OpenBSD has this call in the kernel but doesn't export it to userland.

 * See ip_fil.c for actual hook and more details.

 */

extern  int     iplattach __P((void));

#endif

extern  int     ipl_enable __P((void));

extern  int     ipl_disable __P((void));

extern  void    ipflog_init __P((void));

extern  int     ipflog_clear __P((minor_t));

extern  int     ipflog_read __P((minor_t, struct uio *));

extern  int     ipflog __P((u_int, ip_t *, fr_info_t *, mb_t *));

extern  int     ipllog __P((int, fr_info_t *, void **, size_t *, int *, int));

# if    SOLARIS

extern  int     fr_check __P((ip_t *, int, void *, int, qif_t *, mb_t **));

extern  int     (*fr_checkp) __P((ip_t *, int, void *,

                                  int, qif_t *, mb_t **));

extern  int     icmp_error __P((ip_t *, int, int, qif_t *, struct in_addr));

#  if SOLARIS2 >= 7

extern  int     iplioctl __P((dev_t, int, intptr_t, int, cred_t *, int *));

#  else

extern  int     iplioctl __P((dev_t, int, int *, int, cred_t *, int *));

#  endif

extern  int     iplopen __P((dev_t *, int, int, cred_t *));

extern  int     iplclose __P((dev_t, int, int, cred_t *));

extern  int     ipfsync __P((void));

extern  int     send_reset __P((fr_info_t *, ip_t *, qif_t *));

extern  int     ipfr_fastroute __P((qif_t *, ip_t *, mblk_t *, mblk_t **,

                                   fr_info_t *, frdest_t *));

extern  void    copyin_mblk __P((mblk_t *, size_t, size_t, char *));

extern  void    copyout_mblk __P((mblk_t *, size_t, size_t, char *));

extern  int     fr_qin __P((queue_t *, mblk_t *));

extern  int     fr_qout __P((queue_t *, mblk_t *));

#  ifdef        IPFILTER_LOG

extern  int     iplread __P((dev_t, struct uio *, cred_t *));

#  endif

# else /* SOLARIS */

extern  int     fr_check __P((ip_t *, int, void *, int, mb_t **));

extern  int     (*fr_checkp) __P((ip_t *, int, void *, int, mb_t **));

#  ifdef        linux

extern  int     send_reset __P((tcpiphdr_t *, struct ifnet *));

#  else

extern  int     send_reset __P((fr_info_t *, struct ip *));

extern  int     send_icmp_err __P((ip_t *, int, int, void *, struct in_addr));

#  endif

extern  int     ipfr_fastroute __P((mb_t *, fr_info_t *, frdest_t *));

extern  size_t  mbufchainlen __P((mb_t *));

#  ifdef        __sgi

#   include <sys/cred.h>

extern  int     iplioctl __P((dev_t, int, caddr_t, int, cred_t *, int *));

extern  int     iplopen __P((dev_t *, int, int, cred_t *));

extern  int     iplclose __P((dev_t, int, int, cred_t *));

extern  int     iplread __P((dev_t, struct uio *, cred_t *));

extern  int     ipfsync __P((void));

extern  int     ipfilter_sgi_attach __P((void));

extern  void    ipfilter_sgi_detach __P((void));

extern  void    ipfilter_sgi_intfsync __P((void));

#  else

#   ifdef       IPFILTER_LKM

extern  int     iplidentify __P((char *));

#   endif

#   if (_BSDI_VERSION >= 199510) || (__FreeBSD_version >= 220000) || \

      (NetBSD >= 199511) || defined(__OpenBSD__)

#    if defined(__NetBSD__) || (_BSDI_VERSION >= 199701) || \

       defined(__OpenBSD__) || (__FreeBSD_version >= 300000)

extern  int     iplioctl __P((dev_t, u_long, caddr_t, int, struct proc *));

#    else

extern  int     iplioctl __P((dev_t, int, caddr_t, int, struct proc *));

#    endif

extern  int     iplopen __P((dev_t, int, int, struct proc *));

extern  int     iplclose __P((dev_t, int, int, struct proc *));

#   else

#    ifndef     linux

extern  int     iplopen __P((dev_t, int));

extern  int     iplclose __P((dev_t, int));

extern  int     iplioctl __P((dev_t, int, caddr_t, int));

#    else

extern  int     iplioctl(struct inode *, struct file *, u_int, u_long);

extern  int     iplopen __P((struct inode *, struct file *));

extern  void    iplclose __P((struct inode *, struct file *));

#    endif /* !linux */

#   endif /* (_BSDI_VERSION >= 199510) */

#   if  BSD >= 199306

extern  int     iplread __P((dev_t, struct uio *, int));

#   else

#    ifndef linux

extern  int     iplread __P((dev_t, struct uio *));

#    else

extern  int     iplread(struct inode *, struct file *, char *, int);

#    endif /* !linux */

#   endif /* BSD >= 199306 */

#  endif /* __ sgi */

# endif /* SOLARIS */

#endif /* #ifndef _KERNEL */

extern  void    fixskip __P((frentry_t **, frentry_t *, int));

extern  int     countbits __P((u_32_t));

extern  int     ipldetach __P((void));

extern  u_short fr_tcpsum __P((mb_t *, ip_t *, tcphdr_t *));

extern  int     fr_scanlist __P((u_32_t, ip_t *, fr_info_t *, void *));

extern  u_short ipf_cksum __P((u_short *, int));

extern  int     fr_copytolog __P((int, char *, int));

extern  void    fr_forgetifp __P((void *));

extern  int     frflush __P((minor_t, int));

extern  void    frsync __P((void));

extern  frgroup_t *fr_addgroup __P((u_int, frentry_t *, minor_t, int));

extern  frgroup_t *fr_findgroup __P((u_int, u_32_t, minor_t, int, frgroup_t ***));

extern  void    fr_delgroup __P((u_int, u_32_t, minor_t, int));

extern  void    fr_makefrip __P((int, ip_t *, fr_info_t *));

extern  int     fr_ifpaddr __P((void *, struct in_addr *));

extern  char    *memstr __P((char *, char *, int, int));

extern  int     ipl_unreach;

extern  int     ipl_inited;

extern  u_long  ipl_frouteok[2];

extern  int     fr_pass;

extern  int     fr_flags;

extern  int     fr_active;

extern  fr_info_t       frcache[2];

extern  char    ipfilter_version[];

#ifdef  IPFILTER_LOG

extern  iplog_t **iplh[IPL_LOGMAX+1], *iplt[IPL_LOGMAX+1];

extern  size_t  iplused[IPL_LOGMAX + 1];

#endif

extern  struct frentry *ipfilter[2][2], *ipacct[2][2];

extern  struct frgroup *ipfgroups[3][2];

extern  struct filterstats frstats[];

#endif  /* _NETINET_IP_FIL_H__ */