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freebsd-dev/sys/contrib/ipfilter/netinet/ip_fil.h
Julian Elischer b40ce4165d KSE Milestone 2 
Note ALL MODULES MUST BE RECOMPILED
make the kernel aware that there are smaller units of scheduling than the
process. (but only allow one thread per process at this time).
This is functionally equivalent to teh previousl -current except
that there is a thread associated with each process.

Sorry john! (your next MFC will be a doosie!)

Reviewed by: peter@freebsd.org, dillon@freebsd.org

X-MFC after:    ha ha ha ha
2001-09-12 08:38:13 +00:00

640 lines
21 KiB
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Raw Blame History

/*
* Copyright (C) 1993-2001 by Darren Reed.
*
* See the IPFILTER.LICENCE file for details on licencing.
*
* @(#)ip_fil.h 1.35 6/5/96
* $Id: ip_fil.h,v 2.29.2.4 2000/11/12 11:54:53 darrenr Exp $
* $FreeBSD$
*/
#ifndef __IP_FIL_H__
#define __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 _IOWR('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 *)
# define SIOCSTLCK _IOWR('r', 79, u_int)
# define SIOCSTPUT _IOWR('r', 80, struct ipstate_save *)
# define SIOCSTGET _IOWR('r', 81, struct ipstate_save *)
# define SIOCSTGSZ _IOWR('r', 82, struct natget)
# define SIOCGFRST _IOWR('r', 83, struct ipfrstat *)
#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 _IOWR(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 *)
# define SIOCSTLCK _IOWR(r, 79, u_int)
# define SIOCSTPUT _IOWR(r, 80, struct ipstate_save *)
# define SIOCSTGET _IOWR(r, 81, struct ipstate_save *)
# define SIOCSTGSZ _IOWR(r, 82, struct natget)
# define SIOCGFRST _IOWR(r, 83, struct ipfrstat *)
#endif
#define SIOCADDFR SIOCADAFR
#define SIOCDELFR SIOCRMAFR
#define SIOCINSFR SIOCINAFR
typedef struct fr_ip {
u_32_t fi_v:4; /* IP version */
u_32_t fi_fl:4; /* packet flags */
u_32_t fi_tos:8; /* IP packet TOS */
u_32_t fi_ttl:8; /* IP packet TTL */
u_32_t fi_p:8; /* IP packet protocol */
union i6addr fi_src; /* source address from packet */
union i6addr 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)
#define fi_saddr fi_src.in4.s_addr
#define fi_daddr fi_dst.in4.s_addr
/*
* 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_WILDP (FI_W_SPORT|FI_W_DPORT)
#define FI_W_SADDR 0x00000400
#define FI_W_DADDR 0x00000800
#define FI_WILDA (FI_W_SADDR|FI_W_DADDR)
#define FI_NEWFR 0x00001000
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_32_t 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
void *fin_qfm; /* pointer to mblk where pkt starts */
void *fin_qif;
#endif
u_short fin_plen;
u_short fin_off;
} fr_info_t;
#define fin_v fin_fi.fi_v
#define fin_saddr fin_fi.fi_saddr
#define fin_daddr fin_fi.fi_daddr
#define fin_fl fin_fi.fi_fl
/*
* 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];
#if SOLARIS
mb_t *fd_mp; /* cache resolver for to/dup-to */
#endif
} frdest_t;
typedef struct frpcmp {
int frp_cmp; /* data for port comparisons */
u_short frp_port; /* top port for <> and >< */
u_short frp_top; /* top port for <> and >< */
} frpcmp_t;
typedef struct frtuc {
u_char ftu_tcpfm; /* tcp flags mask */
u_char ftu_tcpf; /* tcp flags */
frpcmp_t ftu_src;
frpcmp_t ftu_dst;
} frtuc_t;
#define ftu_scmp ftu_src.frp_cmp
#define ftu_dcmp ftu_dst.frp_cmp
#define ftu_sport ftu_src.frp_port
#define ftu_dport ftu_dst.frp_port
#define ftu_stop ftu_src.frp_top
#define ftu_dtop ftu_dst.frp_top
typedef struct frentry {
struct frentry *fr_next;
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_short fr_icmpm; /* data for ICMP packets (mask) */
u_short fr_icmp;
frtuc_t fr_tuc;
u_32_t fr_group; /* group to which this rule belongs */
u_32_t fr_grhead; /* group # which this rule starts */
u_32_t fr_flags; /* per-rule flags && options (see below) */
u_int fr_skip; /* # of rules to skip */
u_int fr_loglevel; /* syslog log facility + priority */
int (*fr_func) __P((int, ip_t *, fr_info_t *)); /* call this function */
int fr_sap; /* For solaris only */
u_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 */
u_int fr_cksum; /* checksum on filter rules for performance */
} frentry_t;
#define fr_v fr_ip.fi_v
#define fr_proto fr_ip.fi_p
#define fr_ttl fr_ip.fi_ttl
#define fr_tos fr_ip.fi_tos
#define fr_tcpfm fr_tuc.ftu_tcpfm
#define fr_tcpf fr_tuc.ftu_tcpf
#define fr_scmp fr_tuc.ftu_scmp
#define fr_dcmp fr_tuc.ftu_dcmp
#define fr_dport fr_tuc.ftu_dport
#define fr_sport fr_tuc.ftu_sport
#define fr_stop fr_tuc.ftu_stop
#define fr_dtop fr_tuc.ftu_dtop
#define fr_dst fr_ip.fi_dst.in4
#define fr_src fr_ip.fi_src.in4
#define fr_dmsk fr_mip.fi_dst.in4
#define fr_smsk fr_mip.fi_src.in4
#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_short; /* packets which are short */
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 */
u_long fr_badsrc; /* source received doesn't match route */
u_long fr_badttl; /* TTL in packet doesn't reach minimum */
#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! */
u_long fr_copy; /* messages copied due to db_ref > 1 */
#endif
u_long fr_ipv6[2]; /* IPv6 packets in/out */
} 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_fin6[2];
struct frentry *f_fout6[2];
struct frentry *f_acctin6[2];
struct frentry *f_acctout6[2];
struct frentry *f_auth;
struct frgroup *f_groups[3][2];
u_long f_froute[2];
int f_defpass; /* default pass - from fr_pass */
char f_active; /* 1 or 0 - active rule set */
char f_running; /* 1 if running, else 0 */
char f_logging; /* 1 if enabled, else 0 */
char f_version[32]; /* version string */
int f_locks[4];
} friostat_t;
typedef struct optlist {
u_short ol_val;
int ol_bit;
} optlist_t;
/*
* Group list structure.
*/
typedef struct frgroup {
u_32_t 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_loglevel; /* syslog log level */
u_32_t fl_rule;
u_32_t fl_group;
u_32_t fl_flags;
u_32_t fl_lflags;
} ipflog_t;
#ifndef ICMP_UNREACH_FILTER
# define ICMP_UNREACH_FILTER 13
#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
#define IPF_OPTCOPY 0x07ff00 /* bit mask of copied options */
/*
* 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) || (defined(__FreeBSD_version) && \
(__FreeBSD_version >= 500011))
# if (NetBSD >= 199905)
# define PFIL_HOOKS
# endif
# ifdef PFIL_HOOKS
# define NETBSD_PF
# endif
#endif
#ifndef _KERNEL
struct ifnet;
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 struct ifnet *get_unit __P((char *, int));
# 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
extern int iplattach __P((void));
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));
extern int send_icmp_err __P((ip_t *, int, fr_info_t *, int));
extern int send_reset __P((ip_t *, fr_info_t *));
# 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 **));
# 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 ipfr_fastroute __P((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 *));
extern int iplread __P((dev_t, struct uio *, cred_t *));
# 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 **));
extern int ipfr_fastroute __P((mb_t *, 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 thread *));
# else
extern int iplioctl __P((dev_t, int, caddr_t, int, struct thread *));
# endif
extern int iplopen __P((dev_t, int, int, struct thread *));
extern int iplclose __P((dev_t, int, int, struct thread *));
# 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 char *memstr __P((char *, char *, int, int));
extern void fixskip __P((frentry_t **, frentry_t *, int));
extern int countbits __P((u_32_t));
extern int ipldetach __P((void));
extern u_short ipf_cksum __P((u_short *, int));
extern int ircopyptr __P((void *, void *, size_t));
extern int iwcopyptr __P((void *, void *, size_t));
extern int frflush __P((minor_t, int));
extern void frsync __P((void));
extern frgroup_t *fr_addgroup __P((u_32_t, frentry_t *, minor_t, int));
extern void fr_delgroup __P((u_32_t, u_32_t, minor_t, int));
extern frgroup_t *fr_findgroup __P((u_32_t, u_32_t, minor_t, int,
frgroup_t ***));
extern int fr_copytolog __P((int, char *, int));
extern void fr_forgetifp __P((void *));
extern void fr_getstat __P((struct friostat *));
extern int fr_ifpaddr __P((int, void *, struct in_addr *));
extern int fr_lock __P((caddr_t, int *));
extern void fr_makefrip __P((int, ip_t *, fr_info_t *));
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 int fr_tcpudpchk __P((frtuc_t *, fr_info_t *));
extern int fr_verifysrc __P((struct in_addr, void *));
extern int ipl_unreach;
extern int fr_running;
extern u_long ipl_frouteok[2];
extern int fr_pass;
extern int fr_flags;
extern int fr_active;
extern int fr_chksrc;
extern int fr_minttl;
extern int fr_minttllog;
extern fr_info_t frcache[2];
extern char ipfilter_version[];
extern iplog_t **iplh[IPL_LOGMAX+1], *iplt[IPL_LOGMAX+1];
extern size_t iplused[IPL_LOGMAX + 1];
extern struct frentry *ipfilter[2][2], *ipacct[2][2];
#ifdef USE_INET6
extern struct frentry *ipfilter6[2][2], *ipacct6[2][2];
extern int icmptoicmp6types[ICMP_MAXTYPE+1];
extern int icmptoicmp6unreach[ICMP_MAX_UNREACH];
#endif
extern struct frgroup *ipfgroups[3][2];
extern struct filterstats frstats[];
#endif /* __IP_FIL_H__ */
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