/* $OpenBSD: ip_fil.h,v 1.8 1997/02/11 22:23:16 kstailey Exp $ */ /* * (C)opyright 1993-1996 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 * Id: ip_fil.h,v 2.0.1.2 1997/01/10 00:28:15 darrenr Exp */ #ifndef __IP_FIL_H__ #define __IP_FIL_H__ #ifndef SOLARIS #define SOLARIS (defined(sun) && (defined(__svr4__) || defined(__SVR4))) #endif #if defined(KERNEL) && !defined(_KERNEL) #define _KERNEL #endif #if SOLARIS # include # include # ifdef _KERNEL # include /* * because Solaris 2 defines these in two places :-/ */ #undef IPOPT_EOL #undef IPOPT_NOP #undef IPOPT_LSRR #undef IPOPT_RR #undef IPOPT_SSRR # include # 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) #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) #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; u_char fi_ttl; u_char fi_p; struct in_addr fi_src; struct in_addr fi_dst; u_long fi_optmsk; /* bitmask composed from IP options */ u_short fi_secmsk; /* bitmask composed from IP security options */ u_short fi_auth; } fr_ip_t; #define FI_OPTIONS 0x01 #define FI_TCPUDP 0x02 /* TCP/UCP implied comparison involved */ #define FI_FRAG 0x04 #define FI_SHORT 0x08 typedef struct fr_info { struct fr_ip fin_fi; void *fin_ifp; u_short fin_data[2]; u_short fin_out; u_char fin_tcpf; u_char fin_icode; u_short fin_rule; u_short fin_hlen; u_short fin_dlen; char *fin_dp; /* start of data past IP header */ struct frentry *fin_fr; } fr_info_t; #define FI_CSIZE (sizeof(struct fr_ip) + 11) typedef struct frdest { void *fd_ifp; struct in_addr fd_ip; char fd_ifname[IFNAMSIZ]; } frdest_t; typedef struct frentry { struct frentry *fr_next; struct ifnet *fr_ifa; u_long fr_hits; u_long fr_bytes; /* this is only incremented when a packet */ /* matches this rule and it is the last match*/ /* * 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_long fr_flags; /* per-rule flags && options (see below) */ int (*fr_func) __P((int, ip_t *, fr_info_t *)); /* call this function */ char fr_icode; /* return ICMP code */ char fr_ifname[IFNAMSIZ]; 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 #define FR_PASS 0x00002 #define FR_OUTQUE 0x00004 #define FR_INQUE 0x00008 #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_NOMATCH 0x00200 #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_LOGMASK (FR_LOG|FR_LOGP|FR_LOGB) /* * recognized flags for SIOCGETFF and SIOCSETFF */ #define FF_LOGPASS 0x100000 #define FF_LOGBLOCK 0x200000 #define FF_LOGNOMATCH 0x400000 #define FF_LOGGING (FF_LOGPASS|FF_LOGBLOCK|FF_LOGNOMATCH) #define FF_BLOCKNONIP 0x800000 /* 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_pull[2]; /* good and bad pullup attempts */ #if SOLARIS 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]; int f_active; } friostat_t; typedef struct optlist { u_short ol_val; int ol_bit; } optlist_t; /* * Log structure. Each packet header logged is prepended by one of these, * minimize size to make most effective use of log space which should * (ideally) be a muliple of the most common log entry size. */ typedef struct ipl_ci { u_long sec; u_long usec; u_char hlen; u_char plen; u_short rule; /* assume never more than 64k rules, total */ #if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199603)) || \ (defined(OpenBSD) && (OpenBSD >= 199603)) u_long flags; u_char ifname[IFNAMSIZ]; /* = 32 bytes */ #else u_long flags:24; u_long unit:8; u_char ifname[4]; /* = 20 bytes */ #endif } ipl_ci_t; #ifndef ICMP_UNREACH_FILTER_PROHIB #define ICMP_UNREACH_FILTER_PROHIB 13 #endif #define IPMINLEN(i, h) ((i)->ip_len >= ((i)->ip_hl * 4 + sizeof(struct h))) #define IPLLOGSIZE 8192 #ifdef _KERNEL extern int fr_check __P((ip_t *, int, struct ifnet *, int, struct mbuf **)); #else extern int fr_check __P((ip_t *, int, struct ifnet *, int)); #endif extern int fr_copytolog(char *, int); extern fr_info_t frcache[]; extern char *iplh, *iplt; extern char iplbuf[IPLLOGSIZE]; #ifdef _KERNEL extern struct frentry *ipfilter[2][2], *ipacct[2][2]; extern struct filterstats frstats[]; # if SOLARIS extern int ipfsync(); # endif #endif /* _KERNEL */ #endif /* __IP_FIL_H__ */