/* * Copyright (C) 1993-2001 by Darren Reed. * * The author accepts no responsibility for the use of this software and * provides it on an ``as is'' basis without express or implied warranty. * * Redistribution and use, with or without modification, in source and binary * forms, are permitted provided that this notice is preserved in its entirety * and due credit is given to the original author and the contributors. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied, in part or in whole, and put under another distribution licence * [including the GNU Public Licence.] * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef _NETINET_IP_FIL_H #define _NETINET_IP_FIL_H /****************************************************************************/ #ifndef _SYS_NETINCLUDE_TYPES_H #include #endif /* _SYS_NETINCLUDE_TYPES_H */ #ifndef _SYS_IOCCOM_H #include #endif /* _SYS_IOCCOM_H */ #ifndef _NET_IF_H #include #endif /* _NET_IF_H */ #ifndef _NETINET_IN_H #include #endif /* _NETINET_IN_H */ /****************************************************************************/ #include /****************************************************************************/ #ifdef __cplusplus extern "C" { #endif /* __cplusplus */ /****************************************************************************/ #ifdef __GNUC__ #ifdef __PPC__ #pragma pack(2) #endif #elif defined(__VBCC__) #pragma amiga-align #endif /****************************************************************************/ #define SIOCADAFR _IOW('r', 60, struct frentry *) #define SIOCRMAFR _IOW('r', 61, struct frentry *) #define SIOCSETFF _IOW('r', 62, __ULONG) #define SIOCGETFF _IOR('r', 63, __ULONG) #define SIOCGETFS _IOWR('r', 64, struct friostat *) #define SIOCIPFFL _IOWR('r', 65, __LONG) #define SIOCIPFFB _IOR('r', 66, __LONG) #define SIOCADIFR _IOW('r', 67, struct frentry *) #define SIOCRMIFR _IOW('r', 68, struct frentry *) #define SIOCSWAPA _IOR('r', 69, __ULONG) #define SIOCINAFR _IOW('r', 70, struct frentry *) #define SIOCINIFR _IOW('r', 71, struct frentry *) #define SIOCFRENB _IOW('r', 72, __ULONG) #define SIOCFRSYN _IOW('r', 73, __ULONG) #define SIOCFRZST _IOWR('r', 74, struct friostat *) #define SIOCZRLST _IOWR('r', 75, struct frentry *) #define SIOCAUTHW _IOWR('r', 76, struct frauth_t *) #define SIOCAUTHR _IOWR('r', 77, struct frauth_t *) #define SIOCATHST _IOWR('r', 78, struct fr_authstat *) #define SIOCSTLCK _IOWR('r', 79, __ULONG) #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 *) #define SIOCADDFR SIOCADAFR #define SIOCDELFR SIOCRMAFR #define SIOCINSFR SIOCINAFR union i6addr { __ULONG i6[4]; struct in_addr in4; }; typedef struct fr_ip { unsigned int fi_v:4; /* IP version */ unsigned int fi_fl:4; /* packet flags */ unsigned int fi_tos:8; /* IP packet TOS */ unsigned int fi_ttl:8; /* IP packet TTL */ unsigned int fi_p:8; /* IP packet protocol */ union i6addr fi_src; /* source address from packet */ union i6addr fi_dst; /* destination address from packet */ __ULONG fi_optmsk; /* bitmask composed from IP options */ __UWORD fi_secmsk; /* bitmask composed from IP security options */ __UWORD 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 { __APTR fin_ifp; /* interface packet is `on' */ struct fr_ip fin_fi; /* IP Packet summary */ __UWORD fin_data[2]; /* TCP/UDP ports, ICMP code/type */ __UBYTE fin_out; /* in or out ? 1 == out, 0 == in */ __UBYTE fin_rev; /* state only: 1 = reverse */ __UWORD fin_hlen; /* length of IP header in bytes */ __UBYTE fin_tcpf; /* TCP header flags (SYN, ACK, etc) */ /* From here on is packet specific */ __UBYTE fin_icode; /* ICMP error to return */ __UWORD fin_rule; /* rule # last matched */ __ULONG fin_group; /* group number, -1 for none */ struct frentry *fin_fr; /* last matching rule */ __STRPTR fin_dp; /* start of data past IP header */ __UWORD fin_dlen; /* length of data portion of packet */ __UWORD fin_id; /* IP packet id field */ __APTR fin_mp; /* pointer to pointer to mbuf */ __UWORD fin_plen; __UWORD 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 { __APTR fd_ifp; struct in_addr fd_ip; __TEXT fd_ifname[IFNAMSIZ]; } frdest_t; typedef struct frpcmp { __LONG frp_cmp; /* data for port comparisons */ __UWORD frp_port; /* top port for <> and >< */ __UWORD frp_top; /* top port for <> and >< */ } frpcmp_t; typedef struct frtuc { __UBYTE ftu_tcpfm; /* tcp flags mask */ __UBYTE 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; __LONG fr_ref; /* reference count - for grouping */ __APTR fr_ifa; __APTR fr_oifa; /* * These are only incremented when a packet matches this rule and * it is the last match */ __ULONG fr_hits; __ULONG fr_bytes; /* * Fields after this may not change whilst in the kernel. */ struct fr_ip fr_ip; struct fr_ip fr_mip; /* mask structure */ __UWORD fr_icmpm; /* data for ICMP packets (mask) */ __UWORD fr_icmp; frtuc_t fr_tuc; __ULONG fr_group; /* group to which this rule belongs */ __ULONG fr_grhead; /* group # which this rule starts */ __ULONG fr_flags; /* per-rule flags && options (see below) */ __ULONG fr_skip; /* # of rules to skip */ __ULONG fr_loglevel; /* syslog log facility + priority */ __APTR fr_func; /* call this function */ __LONG fr_sap; __UBYTE fr_icode; /* return ICMP code */ __TEXT fr_ifname[IFNAMSIZ]; __TEXT fr_oifname[IFNAMSIZ]; struct frdest fr_tif; /* "to" interface */ struct frdest fr_dif; /* duplicate packet interfaces */ __ULONG 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) (__LONG)((&((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 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 { __ULONG fr_pass; /* packets allowed */ __ULONG fr_block; /* packets denied */ __ULONG fr_nom; /* packets which don't match any rule */ __ULONG fr_short; /* packets which are short */ __ULONG fr_ppkl; /* packets allowed and logged */ __ULONG fr_bpkl; /* packets denied and logged */ __ULONG fr_npkl; /* packets unmatched and logged */ __ULONG fr_pkl; /* packets logged */ __ULONG fr_skip; /* packets to be logged but buffer full */ __ULONG fr_ret; /* packets for which a return is sent */ __ULONG fr_acct; /* packets for which counting was performed */ __ULONG fr_bnfr; /* bad attempts to allocate fragment state */ __ULONG fr_nfr; /* new fragment state kept */ __ULONG fr_cfr; /* add new fragment state but complete pkt */ __ULONG fr_bads; /* bad attempts to allocate packet state */ __ULONG fr_ads; /* new packet state kept */ __ULONG fr_chit; /* cached hit */ __ULONG fr_tcpbad; /* TCP checksum check failures */ __ULONG fr_pull[2]; /* good and bad pullup attempts */ __ULONG fr_badsrc; /* source received doesn't match route */ __ULONG fr_badttl; /* TTL in packet doesn't reach minimum */ __ULONG 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]; __ULONG f_froute[2]; __LONG f_defpass; /* default pass - from fr_pass */ __BYTE f_active; /* 1 or 0 - active rule set */ __BYTE f_running; /* 1 if running, else 0 */ __BYTE f_logging; /* 1 if enabled, else 0 */ __UBYTE f_version[32]; /* version string */ __LONG f_locks[4]; } friostat_t; typedef struct optlist { __UWORD ol_val; __LONG ol_bit; } optlist_t; /* * Group list structure. */ typedef struct frgroup { __ULONG 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 { __ULONG ipl_magic; __ULONG ipl_count; __ULONG ipl_sec; __ULONG ipl_usec; size_t ipl_dsize; struct iplog *ipl_next; } iplog_t; #define IPL_MAGIC 0x49504c4d /* 'IPLM' */ typedef struct ipflog { __TEXT fl_ifname[IFNAMSIZ]; __UBYTE fl_plen; /* extra data after hlen */ __UBYTE fl_hlen; /* length of IP headers saved */ __UWORD fl_loglevel; /* syslog log level */ __ULONG fl_rule; __ULONG fl_group; __ULONG fl_flags; __ULONG fl_lflags; } ipflog_t; #ifndef ICMP_UNREACH_FILTER # define ICMP_UNREACH_FILTER 13 #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 */ #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 /****************************************************************************/ #ifdef __GNUC__ #ifdef __PPC__ #pragma pack() #endif #elif defined(__VBCC__) #pragma default-align #endif /****************************************************************************/ #ifdef __cplusplus } #endif /* __cplusplus */ /****************************************************************************/ #endif /* _NETINET_IP_FIL_H */