482 lines
15 KiB
C
482 lines
15 KiB
C
/* $NetBSD: ip_fil.h,v 1.20 1997/09/21 18:03:15 veego Exp $ */
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/*
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* (C)opyright 1993-1997 by Darren Reed.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that this notice is preserved and due credit is given
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* to the original author and the contributors.
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*
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* @(#)ip_fil.h 1.35 6/5/96
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* Id: ip_fil.h,v 2.0.2.34 1997/09/10 13:08:17 darrenr Exp
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*/
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#ifndef __IP_FIL_H__
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#define __IP_FIL_H__
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/*
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* Pathnames for various IP Filter control devices. Used by LKM
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* and userland, so defined here.
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*/
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#define IPNAT_NAME "/dev/ipnat"
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#define IPSTATE_NAME "/dev/ipstate"
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#define IPAUTH_NAME "/dev/ipauth"
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#ifndef SOLARIS
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#define SOLARIS (defined(sun) && (defined(__svr4__) || defined(__SVR4)))
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#endif
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#if defined(KERNEL) && !defined(_KERNEL)
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#define _KERNEL
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#endif
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#ifndef __P
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# ifdef __STDC__
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# define __P(x) x
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# else
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# define __P(x) ()
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# endif
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#endif
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#if defined(__STDC__) || defined(__GNUC__)
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#define SIOCADAFR _IOW('r', 60, struct frentry)
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#define SIOCRMAFR _IOW('r', 61, struct frentry)
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#define SIOCSETFF _IOW('r', 62, u_int)
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#define SIOCGETFF _IOR('r', 63, u_int)
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#define SIOCGETFS _IOR('r', 64, struct friostat)
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#define SIOCIPFFL _IOWR('r', 65, int)
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#define SIOCIPFFB _IOR('r', 66, int)
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#define SIOCADIFR _IOW('r', 67, struct frentry)
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#define SIOCRMIFR _IOW('r', 68, struct frentry)
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#define SIOCSWAPA _IOR('r', 69, u_int)
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#define SIOCINAFR _IOW('r', 70, struct frentry)
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#define SIOCINIFR _IOW('r', 71, struct frentry)
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#define SIOCFRENB _IOW('r', 72, u_int)
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#define SIOCFRSYN _IOW('r', 73, u_int)
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#define SIOCFRZST _IOWR('r', 74, struct friostat)
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#define SIOCZRLST _IOWR('r', 75, struct frentry)
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#define SIOCAUTHW _IOWR('r', 76, struct fr_info)
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#define SIOCAUTHR _IOWR('r', 77, struct fr_info)
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#define SIOCATHST _IOWR('r', 78, struct fr_authstat)
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#else
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#define SIOCADAFR _IOW(r, 60, struct frentry)
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#define SIOCRMAFR _IOW(r, 61, struct frentry)
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#define SIOCSETFF _IOW(r, 62, u_int)
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#define SIOCGETFF _IOR(r, 63, u_int)
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#define SIOCGETFS _IOR(r, 64, struct friostat)
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#define SIOCIPFFL _IOWR(r, 65, int)
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#define SIOCIPFFB _IOR(r, 66, int)
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#define SIOCADIFR _IOW(r, 67, struct frentry)
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#define SIOCRMIFR _IOW(r, 68, struct frentry)
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#define SIOCSWAPA _IOR(r, 69, u_int)
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#define SIOCINAFR _IOW(r, 70, struct frentry)
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#define SIOCINIFR _IOW(r, 71, struct frentry)
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#define SIOCFRENB _IOW(r, 72, u_int)
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#define SIOCFRSYN _IOW(r, 73, u_int)
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#define SIOCFRZST _IOWR(r, 74, struct friostat)
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#define SIOCZRLST _IOWR(r, 75, struct frentry)
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#define SIOCAUTHW _IOWR(r, 76, struct fr_info)
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#define SIOCAUTHR _IOWR(r, 77, struct fr_info)
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#define SIOCATHST _IOWR(r, 78, struct fr_authstat)
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#endif
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#define SIOCADDFR SIOCADAFR
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#define SIOCDELFR SIOCRMAFR
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#define SIOCINSFR SIOCINAFR
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typedef struct fr_ip {
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u_char fi_v:4; /* IP version */
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u_char fi_fl:4; /* packet flags */
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u_char fi_tos;
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u_char fi_ttl;
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u_char fi_p;
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struct in_addr fi_src;
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struct in_addr fi_dst;
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u_32_t fi_optmsk; /* bitmask composed from IP options */
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u_short fi_secmsk; /* bitmask composed from IP security options */
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u_short fi_auth;
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} fr_ip_t;
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#define FI_OPTIONS 0x01
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#define FI_TCPUDP 0x02 /* TCP/UCP implied comparison involved */
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#define FI_FRAG 0x04
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#define FI_SHORT 0x08
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typedef struct fr_info {
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struct fr_ip fin_fi;
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u_short fin_data[2];
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u_short fin_out;
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u_short fin_hlen;
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u_char fin_tcpf;
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u_char fin_icode; /* From here on is packet specific */
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u_short fin_rule;
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u_short fin_dlen;
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u_short fin_id;
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void *fin_ifp;
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struct frentry *fin_fr;
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char *fin_dp; /* start of data past IP header */
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void *fin_mp;
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} fr_info_t;
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/*
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* Size for compares on fr_info structures
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*/
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#define FI_CSIZE (sizeof(struct fr_ip) + sizeof(u_short) * 4 + \
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sizeof(u_char))
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/*
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* Size for copying cache fr_info structure
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*/
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#define FI_COPYSIZE (sizeof(fr_info_t) - sizeof(void *) * 2)
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typedef struct frdest {
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void *fd_ifp;
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struct in_addr fd_ip;
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char fd_ifname[IFNAMSIZ];
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} frdest_t;
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typedef struct frentry {
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struct frentry *fr_next;
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u_short fr_group; /* group to which this rule belongs */
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u_short fr_grhead; /* group # which this rule starts */
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struct frentry *fr_grp;
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int fr_ref; /* reference count - for grouping */
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void *fr_ifa;
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/*
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* These are only incremented when a packet matches this rule and
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* it is the last match
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*/
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U_QUAD_T fr_hits;
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U_QUAD_T fr_bytes;
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/*
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* Fields after this may not change whilst in the kernel.
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*/
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struct fr_ip fr_ip;
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struct fr_ip fr_mip; /* mask structure */
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u_char fr_tcpfm; /* tcp flags mask */
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u_char fr_tcpf; /* tcp flags */
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u_short fr_icmpm; /* data for ICMP packets (mask) */
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u_short fr_icmp;
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u_char fr_scmp; /* data for port comparisons */
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u_char fr_dcmp;
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u_short fr_dport;
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u_short fr_sport;
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u_short fr_stop; /* top port for <> and >< */
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u_short fr_dtop; /* top port for <> and >< */
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u_32_t fr_flags; /* per-rule flags && options (see below) */
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int fr_skip; /* # of rules to skip */
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int (*fr_func) __P((int, struct ip *, fr_info_t *)); /* call this function */
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char fr_icode; /* return ICMP code */
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char fr_ifname[IFNAMSIZ];
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struct frdest fr_tif; /* "to" interface */
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struct frdest fr_dif; /* duplicate packet interfaces */
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} frentry_t;
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#define fr_proto fr_ip.fi_p
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#define fr_ttl fr_ip.fi_ttl
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#define fr_tos fr_ip.fi_tos
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#define fr_dst fr_ip.fi_dst
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#define fr_src fr_ip.fi_src
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#define fr_dmsk fr_mip.fi_dst
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#define fr_smsk fr_mip.fi_src
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#ifndef offsetof
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#define offsetof(t,m) (int)((&((t *)0L)->m))
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#endif
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#define FR_CMPSIZ (sizeof(struct frentry) - offsetof(frentry_t, fr_ip))
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/*
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* fr_flags
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*/
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#define FR_BLOCK 0x00001 /* do not allow packet to pass */
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#define FR_PASS 0x00002 /* allow packet to pass */
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#define FR_OUTQUE 0x00004 /* outgoing packets */
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#define FR_INQUE 0x00008 /* ingoing packets */
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#define FR_LOG 0x00010 /* Log */
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#define FR_LOGB 0x00011 /* Log-fail */
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#define FR_LOGP 0x00012 /* Log-pass */
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#define FR_LOGBODY 0x00020 /* Log the body */
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#define FR_LOGFIRST 0x00040 /* Log the first byte if state held */
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#define FR_RETRST 0x00080 /* Return TCP RST packet - reset connection */
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#define FR_RETICMP 0x00100 /* Return ICMP unreachable packet */
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#define FR_NOMATCH 0x00200 /* no match occured */
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#define FR_ACCOUNT 0x00400 /* count packet bytes */
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#define FR_KEEPFRAG 0x00800 /* keep fragment information */
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#define FR_KEEPSTATE 0x01000 /* keep `connection' state information */
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#define FR_INACTIVE 0x02000
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#define FR_QUICK 0x04000 /* match & stop processing list */
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#define FR_FASTROUTE 0x08000 /* bypass normal routing */
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#define FR_CALLNOW 0x10000 /* call another function (fr_func) if matches */
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#define FR_DUP 0x20000 /* duplicate packet */
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#define FR_LOGORBLOCK 0x40000 /* block the packet if it can't be logged */
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#define FR_NOTSRCIP 0x80000 /* not the src IP# */
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#define FR_NOTDSTIP 0x100000 /* not the dst IP# */
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#define FR_AUTH 0x200000 /* use authentication */
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#define FR_PREAUTH 0x400000 /* require preauthentication */
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#define FR_LOGMASK (FR_LOG|FR_LOGP|FR_LOGB)
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/*
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* These correspond to #define's for FI_* and are stored in fr_flags
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*/
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#define FF_OPTIONS 0x01000000
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#define FF_TCPUDP 0x02000000
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#define FF_FRAG 0x04000000
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#define FF_SHORT 0x08000000
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/*
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* recognized flags for SIOCGETFF and SIOCSETFF, and get put in fr_flags
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*/
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#define FF_LOGPASS 0x10000000
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#define FF_LOGBLOCK 0x20000000
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#define FF_LOGNOMATCH 0x40000000
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#define FF_LOGGING (FF_LOGPASS|FF_LOGBLOCK|FF_LOGNOMATCH)
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#define FF_BLOCKNONIP 0x80000000 /* Solaris2 Only */
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#define FR_NONE 0
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#define FR_EQUAL 1
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#define FR_NEQUAL 2
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#define FR_LESST 3
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#define FR_GREATERT 4
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#define FR_LESSTE 5
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#define FR_GREATERTE 6
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#define FR_OUTRANGE 7
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#define FR_INRANGE 8
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typedef struct filterstats {
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u_long fr_pass; /* packets allowed */
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u_long fr_block; /* packets denied */
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u_long fr_nom; /* packets which don't match any rule */
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u_long fr_ppkl; /* packets allowed and logged */
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u_long fr_bpkl; /* packets denied and logged */
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u_long fr_npkl; /* packets unmatched and logged */
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u_long fr_pkl; /* packets logged */
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u_long fr_skip; /* packets to be logged but buffer full */
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u_long fr_ret; /* packets for which a return is sent */
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u_long fr_acct; /* packets for which counting was performed */
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u_long fr_bnfr; /* bad attempts to allocate fragment state */
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u_long fr_nfr; /* new fragment state kept */
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u_long fr_cfr; /* add new fragment state but complete pkt */
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u_long fr_bads; /* bad attempts to allocate packet state */
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u_long fr_ads; /* new packet state kept */
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u_long fr_chit; /* cached hit */
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u_long fr_pull[2]; /* good and bad pullup attempts */
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#if SOLARIS
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u_long fr_bad; /* bad IP packets to the filter */
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u_long fr_notip; /* packets passed through no on ip queue */
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u_long fr_drop; /* packets dropped - no info for them! */
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#endif
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} filterstats_t;
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/*
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* For SIOCGETFS
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*/
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typedef struct friostat {
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struct filterstats f_st[2];
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struct frentry *f_fin[2];
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struct frentry *f_fout[2];
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struct frentry *f_acctin[2];
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struct frentry *f_acctout[2];
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struct frentry *f_auth;
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int f_active;
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} friostat_t;
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typedef struct optlist {
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u_short ol_val;
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int ol_bit;
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} optlist_t;
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/*
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* Group list structure.
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*/
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typedef struct frgroup {
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u_short fg_num;
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struct frgroup *fg_next;
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struct frentry *fg_head;
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struct frentry **fg_start;
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} frgroup_t;
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/*
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* Log structure. Each packet header logged is prepended by one of these.
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* Following this in the log records read from the device will be an ipflog
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* structure which is then followed by any packet data.
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*/
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typedef struct iplog {
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u_long ipl_sec;
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u_long ipl_usec;
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u_int ipl_len;
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u_int ipl_count;
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size_t ipl_dsize;
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struct iplog *ipl_next;
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} iplog_t;
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typedef struct ipflog {
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#if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199603))
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u_char fl_ifname[IFNAMSIZ];
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#else
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u_int fl_unit;
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u_char fl_ifname[4];
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#endif
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u_char fl_plen; /* extra data after hlen */
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u_char fl_hlen; /* length of IP headers saved */
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u_short fl_rule; /* assume never more than 64k rules, total */
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u_32_t fl_flags;
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} ipflog_t;
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#ifndef ICMP_UNREACH_FILTER
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#define ICMP_UNREACH_FILTER 13
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#endif
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#ifndef IPF_LOGGING
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#define IPF_LOGGING 0
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#endif
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#ifndef IPF_DEFAULT_PASS
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#define IPF_DEFAULT_PASS FR_PASS
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#endif
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#define IPMINLEN(i, h) ((i)->ip_len >= ((i)->ip_hl * 4 + sizeof(struct h)))
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#define IPLLOGSIZE 8192
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/*
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* Device filenames for reading log information. Use ipf on Solaris2 because
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* ipl is already a name used by something else.
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*/
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#ifndef IPL_NAME
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# if SOLARIS
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# define IPL_NAME "/dev/ipf"
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# else
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# define IPL_NAME "/dev/ipl"
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# endif
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#endif
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#define IPL_NAT IPNAT_NAME
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#define IPL_STATE IPSTATE_NAME
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#define IPL_AUTH IPAUTH_NAME
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#define IPL_LOGIPF 0 /* Minor device #'s for accessing logs */
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#define IPL_LOGNAT 1
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#define IPL_LOGSTATE 2
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#define IPL_LOGAUTH 3
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#define IPL_LOGMAX 3
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#if !defined(CDEV_MAJOR) && defined (__FreeBSD_version) && \
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(__FreeBSD_version >= 220000)
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# define CDEV_MAJOR 79
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#endif
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#ifndef _KERNEL
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extern int fr_check __P((struct ip *, int, void *, int, mb_t **));
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extern int (*fr_checkp) __P((struct ip *, int, void *, int, mb_t **));
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extern int send_reset __P((struct ip *, struct ifnet *));
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extern int icmp_error __P((struct ip *, struct ifnet *));
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extern int ipf_log __P((void));
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extern void ipfr_fastroute __P((struct ip *, fr_info_t *, frdest_t *));
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extern struct ifnet *get_unit __P((char *));
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# define FR_SCANLIST(p, ip, fi, m) fr_scanlist(p, ip, fi, m)
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# ifdef __NetBSD__
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extern int iplioctl __P((dev_t, u_long, caddr_t, int));
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# else
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extern int iplioctl __P((dev_t, int, caddr_t, int));
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# endif
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extern int iplopen __P((dev_t, int));
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extern int iplclose __P((dev_t, int));
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#else /* #ifndef _KERNEL */
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# if defined(__NetBSD__)
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/* Pesudo-device attach routine; no-op, really. */
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extern void ipfilterattach __P((int));
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# else
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extern int iplattach __P((void));
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# endif
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extern int ipl_enable __P((void));
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extern int ipl_disable __P((void));
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extern void ipflog_init __P((void));
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extern int ipflog_clear __P((int));
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extern int ipflog_read __P((int, struct uio *));
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extern int ipflog __P((u_int, struct ip *, fr_info_t *, mb_t *));
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extern int ipllog __P((int, u_long, void **, size_t *, int *, int));
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# if SOLARIS
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extern int fr_check __P((struct ip *, int, void *, int, qif_t *, mb_t **));
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extern int (*fr_checkp) __P((struct ip *, int, void *,
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int, qif_t *, mb_t **));
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extern int icmp_error __P((ip_t *, int, int, qif_t *,
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struct in_addr));
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extern int iplioctl __P((dev_t, int, int, int, cred_t *, int *));
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extern int iplopen __P((dev_t *, int, int, cred_t *));
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extern int iplclose __P((dev_t, int, int, cred_t *));
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extern int ipfsync __P((void));
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extern int send_reset __P((ip_t *, qif_t *));
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extern int ipfr_fastroute __P((qif_t *, ip_t *, mblk_t *, mblk_t **,
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fr_info_t *, frdest_t *));
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extern void copyin_mblk __P((mblk_t *, int, int, char *));
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extern void copyout_mblk __P((mblk_t *, int, int, char *));
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extern int fr_qin __P((queue_t *, mblk_t *));
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extern int fr_qout __P((queue_t *, mblk_t *));
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# ifdef IPFILTER_LOG
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extern int iplread __P((dev_t, struct uio *, cred_t *));
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# endif
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# else /* SOLARIS */
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extern int fr_check __P((struct ip *, int, void *, int, mb_t **));
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extern int (*fr_checkp) __P((struct ip *, int, void *, int, mb_t **));
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extern int send_reset __P((struct tcpiphdr *));
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extern void ipfr_fastroute __P((struct mbuf *, fr_info_t *, frdest_t *));
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# ifdef IPFILTER_LKM
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extern int iplidentify __P((char *));
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# endif
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# if (_BSDI_VERSION >= 199510) || (__FreeBSD_version >= 220000) || \
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(NetBSD >= 199511)
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# ifdef __NetBSD__
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extern int iplioctl __P((dev_t, u_long, caddr_t, int, struct proc *));
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# else
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extern int iplioctl __P((dev_t, int, caddr_t, int, struct proc *));
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# endif
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extern int iplopen __P((dev_t, int, int, struct proc *));
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extern int iplclose __P((dev_t, int, int, struct proc *));
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# else
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extern int iplioctl __P((dev_t, int, caddr_t, int));
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extern int iplopen __P((dev_t, int));
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extern int iplclose __P((dev_t, int));
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# endif /* (_BSDI_VERSION >= 199510) */
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# if BSD >= 199306
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|
extern int iplread __P((dev_t, struct uio *, int));
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# else
|
|
extern int iplread __P((dev_t, struct uio *));
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# endif /* BSD >= 199306 */
|
|
# endif /* SOLARIS */
|
|
#endif /* #ifndef _KERNEL */
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|
|
|
/*
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|
* 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)
|
|
# define NETBSD_PF
|
|
#endif
|
|
|
|
#ifndef __NetBSD__
|
|
extern int ipldetach __P((void));
|
|
#endif
|
|
extern u_short fr_tcpsum __P((mb_t *, ip_t *, tcphdr_t *));
|
|
#define FR_SCANLIST(p, ip, fi, m) fr_scanlist(p, ip, fi, m)
|
|
extern int fr_scanlist __P((int, ip_t *, fr_info_t *, void *));
|
|
extern u_short ipf_cksum __P((u_short *, int));
|
|
extern int fr_copytolog __P((int, char *, int));
|
|
extern int ipl_unreach;
|
|
extern int ipl_inited;
|
|
extern int fr_pass;
|
|
extern int fr_flags;
|
|
extern int fr_active;
|
|
extern fr_info_t frcache[2];
|
|
#ifdef IPFILTER_LOG
|
|
extern iplog_t **iplh[IPL_LOGMAX+1], *iplt[IPL_LOGMAX+1];
|
|
extern int 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 /* __IP_FIL_H__ */
|