17c478bd9Sstevel@tonic-gate /* 2ab25eeb5Syz * Copyright (C) 1995-2001, 2003 by Darren Reed. 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * See the IPFILTER.LICENCE file for details on licencing. 57c478bd9Sstevel@tonic-gate * 67c478bd9Sstevel@tonic-gate * @(#)ip_nat.h 1.5 2/4/96 7ab25eeb5Syz * $Id: ip_nat.h,v 2.90.2.11 2005/06/18 02:41:32 darrenr Exp $ 8*3805c50fSan * 9f4b3ec61Sdh * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 105b6dcef9Sdr * Use is subject to license terms. 117c478bd9Sstevel@tonic-gate */ 125b6dcef9Sdr #pragma ident "%Z%%M% %I% %E% SMI" 137c478bd9Sstevel@tonic-gate 147c478bd9Sstevel@tonic-gate #ifndef __IP_NAT_H__ 157c478bd9Sstevel@tonic-gate #define __IP_NAT_H__ 167c478bd9Sstevel@tonic-gate 177c478bd9Sstevel@tonic-gate #ifndef SOLARIS 187c478bd9Sstevel@tonic-gate #define SOLARIS (defined(sun) && (defined(__svr4__) || defined(__SVR4))) 197c478bd9Sstevel@tonic-gate #endif 207c478bd9Sstevel@tonic-gate 21ab25eeb5Syz #if defined(__STDC__) || defined(__GNUC__) || defined(_AIX51) 227c478bd9Sstevel@tonic-gate #define SIOCADNAT _IOW('r', 60, struct ipfobj) 237c478bd9Sstevel@tonic-gate #define SIOCRMNAT _IOW('r', 61, struct ipfobj) 247c478bd9Sstevel@tonic-gate #define SIOCGNATS _IOWR('r', 62, struct ipfobj) 257c478bd9Sstevel@tonic-gate #define SIOCGNATL _IOWR('r', 63, struct ipfobj) 267c478bd9Sstevel@tonic-gate #else 277c478bd9Sstevel@tonic-gate #define SIOCADNAT _IOW(r, 60, struct ipfobj) 287c478bd9Sstevel@tonic-gate #define SIOCRMNAT _IOW(r, 61, struct ipfobj) 297c478bd9Sstevel@tonic-gate #define SIOCGNATS _IOWR(r, 62, struct ipfobj) 307c478bd9Sstevel@tonic-gate #define SIOCGNATL _IOWR(r, 63, struct ipfobj) 317c478bd9Sstevel@tonic-gate #endif 327c478bd9Sstevel@tonic-gate 337c478bd9Sstevel@tonic-gate #undef LARGE_NAT /* define this if you're setting up a system to NAT 347c478bd9Sstevel@tonic-gate * LARGE numbers of networks/hosts - i.e. in the 357c478bd9Sstevel@tonic-gate * hundreds or thousands. In such a case, you should 367c478bd9Sstevel@tonic-gate * also change the RDR_SIZE and NAT_SIZE below to more 377c478bd9Sstevel@tonic-gate * appropriate sizes. The figures below were used for 387c478bd9Sstevel@tonic-gate * a setup with 1000-2000 networks to NAT. 397c478bd9Sstevel@tonic-gate */ 407c478bd9Sstevel@tonic-gate #ifndef NAT_SIZE 417c478bd9Sstevel@tonic-gate # ifdef LARGE_NAT 427c478bd9Sstevel@tonic-gate # define NAT_SIZE 2047 437c478bd9Sstevel@tonic-gate # else 447c478bd9Sstevel@tonic-gate # define NAT_SIZE 127 457c478bd9Sstevel@tonic-gate # endif 467c478bd9Sstevel@tonic-gate #endif 477c478bd9Sstevel@tonic-gate #ifndef RDR_SIZE 487c478bd9Sstevel@tonic-gate # ifdef LARGE_NAT 497c478bd9Sstevel@tonic-gate # define RDR_SIZE 2047 507c478bd9Sstevel@tonic-gate # else 517c478bd9Sstevel@tonic-gate # define RDR_SIZE 127 527c478bd9Sstevel@tonic-gate # endif 537c478bd9Sstevel@tonic-gate #endif 547c478bd9Sstevel@tonic-gate #ifndef HOSTMAP_SIZE 557c478bd9Sstevel@tonic-gate # ifdef LARGE_NAT 56ab25eeb5Syz # define HOSTMAP_SIZE 8191 57ab25eeb5Syz # else 587c478bd9Sstevel@tonic-gate # define HOSTMAP_SIZE 2047 59ab25eeb5Syz # endif 60ab25eeb5Syz #endif 61ab25eeb5Syz #ifndef NAT_TABLE_MAX 62ab25eeb5Syz /* 63ab25eeb5Syz * This is newly introduced and for the sake of "least surprise", the numbers 64ab25eeb5Syz * present aren't what we'd normally use for creating a proper hash table. 65ab25eeb5Syz */ 66ab25eeb5Syz # ifdef LARGE_NAT 67ab25eeb5Syz # define NAT_TABLE_MAX 180000 687c478bd9Sstevel@tonic-gate # else 69ab25eeb5Syz # define NAT_TABLE_MAX 30000 707c478bd9Sstevel@tonic-gate # endif 717c478bd9Sstevel@tonic-gate #endif 727c478bd9Sstevel@tonic-gate #ifndef NAT_TABLE_SZ 737c478bd9Sstevel@tonic-gate # ifdef LARGE_NAT 747c478bd9Sstevel@tonic-gate # define NAT_TABLE_SZ 16383 75ab25eeb5Syz # else 76ab25eeb5Syz # define NAT_TABLE_SZ 2047 777c478bd9Sstevel@tonic-gate # endif 787c478bd9Sstevel@tonic-gate #endif 797c478bd9Sstevel@tonic-gate #ifndef APR_LABELLEN 807c478bd9Sstevel@tonic-gate #define APR_LABELLEN 16 817c478bd9Sstevel@tonic-gate #endif 827c478bd9Sstevel@tonic-gate 837c478bd9Sstevel@tonic-gate #define DEF_NAT_AGE 1200 /* 10 minutes (600 seconds) */ 847c478bd9Sstevel@tonic-gate 85*3805c50fSan /* 86*3805c50fSan * Default hi and lo watermarks used with forced flush of nat table. 87*3805c50fSan */ 88*3805c50fSan 89*3805c50fSan #define NAT_FLUSH_HI 95 90*3805c50fSan #define NAT_FLUSH_LO 75 91*3805c50fSan 92*3805c50fSan /* How full is the nat table? */ 93*3805c50fSan 94*3805c50fSan #define NAT_TAB_WATER_LEVEL(x) ((x)->ifs_nat_stats.ns_inuse * 100 \ 95*3805c50fSan / (x)->ifs_ipf_nattable_max) 96*3805c50fSan 977c478bd9Sstevel@tonic-gate struct ipstate; 987c478bd9Sstevel@tonic-gate struct ap_session; 997c478bd9Sstevel@tonic-gate 1007c478bd9Sstevel@tonic-gate typedef struct nat { 1017c478bd9Sstevel@tonic-gate ipfmutex_t nat_lock; 1027c478bd9Sstevel@tonic-gate struct nat *nat_next; 1037c478bd9Sstevel@tonic-gate struct nat **nat_pnext; 1047c478bd9Sstevel@tonic-gate struct nat *nat_hnext[2]; 1057c478bd9Sstevel@tonic-gate struct nat **nat_phnext[2]; 1067c478bd9Sstevel@tonic-gate struct hostmap *nat_hm; 1077c478bd9Sstevel@tonic-gate void *nat_data; 1087c478bd9Sstevel@tonic-gate struct nat **nat_me; 1097c478bd9Sstevel@tonic-gate struct ipstate *nat_state; 1107c478bd9Sstevel@tonic-gate struct ap_session *nat_aps; /* proxy session */ 1117c478bd9Sstevel@tonic-gate frentry_t *nat_fr; /* filter rule ptr if appropriate */ 1127c478bd9Sstevel@tonic-gate struct ipnat *nat_ptr; /* pointer back to the rule */ 1137c478bd9Sstevel@tonic-gate void *nat_ifps[2]; 1147c478bd9Sstevel@tonic-gate void *nat_sync; 1157c478bd9Sstevel@tonic-gate ipftqent_t nat_tqe; 1167c478bd9Sstevel@tonic-gate u_32_t nat_flags; 1177c478bd9Sstevel@tonic-gate u_32_t nat_sumd[2]; /* ip checksum delta for data segment*/ 1187c478bd9Sstevel@tonic-gate u_32_t nat_ipsumd; /* ip checksum delta for ip header */ 1197c478bd9Sstevel@tonic-gate u_32_t nat_mssclamp; /* if != zero clamp MSS to this */ 1207c478bd9Sstevel@tonic-gate i6addr_t nat_inip6; 1217c478bd9Sstevel@tonic-gate i6addr_t nat_outip6; 1227c478bd9Sstevel@tonic-gate i6addr_t nat_oip6; /* other ip */ 1237c478bd9Sstevel@tonic-gate U_QUAD_T nat_pkts[2]; 1247c478bd9Sstevel@tonic-gate U_QUAD_T nat_bytes[2]; 1257c478bd9Sstevel@tonic-gate union { 1267c478bd9Sstevel@tonic-gate udpinfo_t nat_unu; 1277c478bd9Sstevel@tonic-gate tcpinfo_t nat_unt; 1287c478bd9Sstevel@tonic-gate icmpinfo_t nat_uni; 1297c478bd9Sstevel@tonic-gate greinfo_t nat_ugre; 1307c478bd9Sstevel@tonic-gate } nat_un; 1317c478bd9Sstevel@tonic-gate u_short nat_oport; /* other port */ 1327c478bd9Sstevel@tonic-gate u_short nat_use; 1337c478bd9Sstevel@tonic-gate u_char nat_p; /* protocol for NAT */ 1347c478bd9Sstevel@tonic-gate int nat_dir; 1357c478bd9Sstevel@tonic-gate int nat_ref; /* reference count */ 1367c478bd9Sstevel@tonic-gate int nat_hv[2]; 1377c478bd9Sstevel@tonic-gate char nat_ifnames[2][LIFNAMSIZ]; 138ab25eeb5Syz int nat_rev; /* 0 = forward, 1 = reverse */ 139f4b3ec61Sdh int nat_redir; /* copy of in_redir */ 1407c478bd9Sstevel@tonic-gate } nat_t; 1417c478bd9Sstevel@tonic-gate 1427c478bd9Sstevel@tonic-gate #define nat_inip nat_inip6.in4 1437c478bd9Sstevel@tonic-gate #define nat_outip nat_outip6.in4 1447c478bd9Sstevel@tonic-gate #define nat_oip nat_oip6.in4 1457c478bd9Sstevel@tonic-gate #define nat_age nat_tqe.tqe_die 1467c478bd9Sstevel@tonic-gate #define nat_inport nat_un.nat_unt.ts_sport 1477c478bd9Sstevel@tonic-gate #define nat_outport nat_un.nat_unt.ts_dport 1487c478bd9Sstevel@tonic-gate #define nat_type nat_un.nat_uni.ici_type 1497c478bd9Sstevel@tonic-gate #define nat_seq nat_un.nat_uni.ici_seq 1507c478bd9Sstevel@tonic-gate #define nat_id nat_un.nat_uni.ici_id 1517c478bd9Sstevel@tonic-gate #define nat_tcpstate nat_tqe.tqe_state 152*3805c50fSan #define nat_touched nat_tqe.tqe_touched 1537c478bd9Sstevel@tonic-gate 1547c478bd9Sstevel@tonic-gate /* 1557c478bd9Sstevel@tonic-gate * Values for nat_dir 1567c478bd9Sstevel@tonic-gate */ 1577c478bd9Sstevel@tonic-gate #define NAT_INBOUND 0 1587c478bd9Sstevel@tonic-gate #define NAT_OUTBOUND 1 1597c478bd9Sstevel@tonic-gate 1607c478bd9Sstevel@tonic-gate /* 1617c478bd9Sstevel@tonic-gate * Definitions for nat_flags 1627c478bd9Sstevel@tonic-gate */ 1637c478bd9Sstevel@tonic-gate #define NAT_TCP 0x0001 /* IPN_TCP */ 1647c478bd9Sstevel@tonic-gate #define NAT_UDP 0x0002 /* IPN_UDP */ 1657c478bd9Sstevel@tonic-gate #define NAT_ICMPERR 0x0004 /* IPN_ICMPERR */ 1667c478bd9Sstevel@tonic-gate #define NAT_ICMPQUERY 0x0008 /* IPN_ICMPQUERY */ 1677c478bd9Sstevel@tonic-gate #define NAT_SEARCH 0x0010 1687c478bd9Sstevel@tonic-gate #define NAT_SLAVE 0x0020 /* Slave connection for a proxy */ 1697c478bd9Sstevel@tonic-gate #define NAT_NOTRULEPORT 0x0040 1707c478bd9Sstevel@tonic-gate 1717c478bd9Sstevel@tonic-gate #define NAT_TCPUDP (NAT_TCP|NAT_UDP) 1727c478bd9Sstevel@tonic-gate #define NAT_TCPUDPICMP (NAT_TCP|NAT_UDP|NAT_ICMPERR) 173ab25eeb5Syz #define NAT_TCPUDPICMPQ (NAT_TCP|NAT_UDP|NAT_ICMPQUERY) 1747c478bd9Sstevel@tonic-gate #define NAT_FROMRULE (NAT_TCP|NAT_UDP) 1757c478bd9Sstevel@tonic-gate 1767c478bd9Sstevel@tonic-gate /* 0x0100 reserved for FI_W_SPORT */ 1777c478bd9Sstevel@tonic-gate /* 0x0200 reserved for FI_W_DPORT */ 1787c478bd9Sstevel@tonic-gate /* 0x0400 reserved for FI_W_SADDR */ 1797c478bd9Sstevel@tonic-gate /* 0x0800 reserved for FI_W_DADDR */ 1807c478bd9Sstevel@tonic-gate /* 0x1000 reserved for FI_W_NEWFR */ 1817c478bd9Sstevel@tonic-gate /* 0x2000 reserved for SI_CLONE */ 1827c478bd9Sstevel@tonic-gate /* 0x4000 reserved for SI_CLONED */ 1837c478bd9Sstevel@tonic-gate /* 0x8000 reserved for SI_IGNOREPKT */ 1847c478bd9Sstevel@tonic-gate 1857c478bd9Sstevel@tonic-gate #define NAT_DEBUG 0x800000 1867c478bd9Sstevel@tonic-gate 1877c478bd9Sstevel@tonic-gate typedef struct ipnat { 1887c478bd9Sstevel@tonic-gate struct ipnat *in_next; /* NAT rule list next */ 1897c478bd9Sstevel@tonic-gate struct ipnat *in_rnext; /* rdr rule hash next */ 1907c478bd9Sstevel@tonic-gate struct ipnat **in_prnext; /* prior rdr next ptr */ 1917c478bd9Sstevel@tonic-gate struct ipnat *in_mnext; /* map rule hash next */ 1927c478bd9Sstevel@tonic-gate struct ipnat **in_pmnext; /* prior map next ptr */ 1937c478bd9Sstevel@tonic-gate struct ipftq *in_tqehead[2]; 1947c478bd9Sstevel@tonic-gate void *in_ifps[2]; 1957c478bd9Sstevel@tonic-gate void *in_apr; 1967c478bd9Sstevel@tonic-gate char *in_comment; 1977c478bd9Sstevel@tonic-gate i6addr_t in_next6; 1987c478bd9Sstevel@tonic-gate u_long in_space; 1997c478bd9Sstevel@tonic-gate u_long in_hits; 2007c478bd9Sstevel@tonic-gate u_int in_use; 2017c478bd9Sstevel@tonic-gate u_int in_hv; 2027c478bd9Sstevel@tonic-gate int in_flineno; /* conf. file line number */ 2037c478bd9Sstevel@tonic-gate u_short in_pnext; 204ab25eeb5Syz u_char in_v; 205ab25eeb5Syz u_char in_xxx; 2067c478bd9Sstevel@tonic-gate /* From here to the end is covered by IPN_CMPSIZ */ 2077c478bd9Sstevel@tonic-gate u_32_t in_flags; 2087c478bd9Sstevel@tonic-gate u_32_t in_mssclamp; /* if != 0 clamp MSS to this */ 2097c478bd9Sstevel@tonic-gate u_int in_age[2]; 2107c478bd9Sstevel@tonic-gate int in_redir; /* see below for values */ 2117c478bd9Sstevel@tonic-gate int in_p; /* protocol. */ 2127c478bd9Sstevel@tonic-gate i6addr_t in_in[2]; 2137c478bd9Sstevel@tonic-gate i6addr_t in_out[2]; 2147c478bd9Sstevel@tonic-gate i6addr_t in_src[2]; 2157c478bd9Sstevel@tonic-gate frtuc_t in_tuc; 2167c478bd9Sstevel@tonic-gate u_short in_port[2]; 2177c478bd9Sstevel@tonic-gate u_short in_ppip; /* ports per IP. */ 2187c478bd9Sstevel@tonic-gate u_short in_ippip; /* IP #'s per IP# */ 2197c478bd9Sstevel@tonic-gate char in_ifnames[2][LIFNAMSIZ]; 2207c478bd9Sstevel@tonic-gate char in_plabel[APR_LABELLEN]; /* proxy label. */ 2217c478bd9Sstevel@tonic-gate ipftag_t in_tag; 2227c478bd9Sstevel@tonic-gate } ipnat_t; 2237c478bd9Sstevel@tonic-gate 2247c478bd9Sstevel@tonic-gate #define in_pmin in_port[0] /* Also holds static redir port */ 2257c478bd9Sstevel@tonic-gate #define in_pmax in_port[1] 2267c478bd9Sstevel@tonic-gate #define in_nextip in_next6.in4 2277c478bd9Sstevel@tonic-gate #define in_nip in_next6.in4.s_addr 2287c478bd9Sstevel@tonic-gate #define in_inip in_in[0].in4.s_addr 2297c478bd9Sstevel@tonic-gate #define in_inmsk in_in[1].in4.s_addr 2307c478bd9Sstevel@tonic-gate #define in_outip in_out[0].in4.s_addr 2317c478bd9Sstevel@tonic-gate #define in_outmsk in_out[1].in4.s_addr 2327c478bd9Sstevel@tonic-gate #define in_srcip in_src[0].in4.s_addr 2337c478bd9Sstevel@tonic-gate #define in_srcmsk in_src[1].in4.s_addr 2347c478bd9Sstevel@tonic-gate #define in_scmp in_tuc.ftu_scmp 2357c478bd9Sstevel@tonic-gate #define in_dcmp in_tuc.ftu_dcmp 2367c478bd9Sstevel@tonic-gate #define in_stop in_tuc.ftu_stop 2377c478bd9Sstevel@tonic-gate #define in_dtop in_tuc.ftu_dtop 2387c478bd9Sstevel@tonic-gate #define in_sport in_tuc.ftu_sport 2397c478bd9Sstevel@tonic-gate #define in_dport in_tuc.ftu_dport 2407c478bd9Sstevel@tonic-gate 2417c478bd9Sstevel@tonic-gate /* 2427c478bd9Sstevel@tonic-gate * Bit definitions for in_flags 2437c478bd9Sstevel@tonic-gate */ 2447c478bd9Sstevel@tonic-gate #define IPN_ANY 0x00000 2457c478bd9Sstevel@tonic-gate #define IPN_TCP 0x00001 2467c478bd9Sstevel@tonic-gate #define IPN_UDP 0x00002 2477c478bd9Sstevel@tonic-gate #define IPN_TCPUDP (IPN_TCP|IPN_UDP) 2487c478bd9Sstevel@tonic-gate #define IPN_ICMPERR 0x00004 2497c478bd9Sstevel@tonic-gate #define IPN_TCPUDPICMP (IPN_TCP|IPN_UDP|IPN_ICMPERR) 2507c478bd9Sstevel@tonic-gate #define IPN_ICMPQUERY 0x00008 251ab25eeb5Syz #define IPN_TCPUDPICMPQ (IPN_TCP|IPN_UDP|IPN_ICMPQUERY) 2527c478bd9Sstevel@tonic-gate #define IPN_RF (IPN_TCPUDP|IPN_DELETE|IPN_ICMPERR) 2537c478bd9Sstevel@tonic-gate #define IPN_AUTOPORTMAP 0x00010 2547c478bd9Sstevel@tonic-gate #define IPN_IPRANGE 0x00020 2557c478bd9Sstevel@tonic-gate #define IPN_FILTER 0x00040 2567c478bd9Sstevel@tonic-gate #define IPN_SPLIT 0x00080 2577c478bd9Sstevel@tonic-gate #define IPN_ROUNDR 0x00100 2587c478bd9Sstevel@tonic-gate #define IPN_NOTSRC 0x04000 2597c478bd9Sstevel@tonic-gate #define IPN_NOTDST 0x08000 2607c478bd9Sstevel@tonic-gate #define IPN_DYNSRCIP 0x10000 /* dynamic src IP# */ 2617c478bd9Sstevel@tonic-gate #define IPN_DYNDSTIP 0x20000 /* dynamic dst IP# */ 2627c478bd9Sstevel@tonic-gate #define IPN_DELETE 0x40000 2637c478bd9Sstevel@tonic-gate #define IPN_STICKY 0x80000 2647c478bd9Sstevel@tonic-gate #define IPN_FRAG 0x100000 265ab25eeb5Syz #define IPN_FIXEDDPORT 0x200000 2665b6dcef9Sdr #define IPN_FINDFORWARD 0x400000 267ab25eeb5Syz #define IPN_IN 0x800000 2687c478bd9Sstevel@tonic-gate #define IPN_USERFLAGS (IPN_TCPUDP|IPN_AUTOPORTMAP|IPN_IPRANGE|IPN_SPLIT|\ 2697c478bd9Sstevel@tonic-gate IPN_ROUNDR|IPN_FILTER|IPN_NOTSRC|IPN_NOTDST|\ 270ab25eeb5Syz IPN_FRAG|IPN_STICKY|IPN_FIXEDDPORT|IPN_ICMPQUERY) 2717c478bd9Sstevel@tonic-gate 2727c478bd9Sstevel@tonic-gate /* 2737c478bd9Sstevel@tonic-gate * Values for in_redir 2747c478bd9Sstevel@tonic-gate */ 2757c478bd9Sstevel@tonic-gate #define NAT_MAP 0x01 2767c478bd9Sstevel@tonic-gate #define NAT_REDIRECT 0x02 2777c478bd9Sstevel@tonic-gate #define NAT_BIMAP (NAT_MAP|NAT_REDIRECT) 2787c478bd9Sstevel@tonic-gate #define NAT_MAPBLK 0x04 2797c478bd9Sstevel@tonic-gate 2807c478bd9Sstevel@tonic-gate #define MAPBLK_MINPORT 1024 /* don't use reserved ports for src port */ 2817c478bd9Sstevel@tonic-gate #define USABLE_PORTS (65536 - MAPBLK_MINPORT) 2827c478bd9Sstevel@tonic-gate 2837c478bd9Sstevel@tonic-gate #define IPN_CMPSIZ (sizeof(ipnat_t) - offsetof(ipnat_t, in_flags)) 2847c478bd9Sstevel@tonic-gate 2857c478bd9Sstevel@tonic-gate typedef struct natlookup { 2867c478bd9Sstevel@tonic-gate struct in_addr nl_inip; 2877c478bd9Sstevel@tonic-gate struct in_addr nl_outip; 2887c478bd9Sstevel@tonic-gate struct in_addr nl_realip; 2897c478bd9Sstevel@tonic-gate int nl_flags; 2907c478bd9Sstevel@tonic-gate u_short nl_inport; 2917c478bd9Sstevel@tonic-gate u_short nl_outport; 2927c478bd9Sstevel@tonic-gate u_short nl_realport; 2937c478bd9Sstevel@tonic-gate } natlookup_t; 2947c478bd9Sstevel@tonic-gate 2957c478bd9Sstevel@tonic-gate 2967c478bd9Sstevel@tonic-gate typedef struct nat_save { 2977c478bd9Sstevel@tonic-gate void *ipn_next; 2987c478bd9Sstevel@tonic-gate struct nat ipn_nat; 2997c478bd9Sstevel@tonic-gate struct ipnat ipn_ipnat; 3007c478bd9Sstevel@tonic-gate struct frentry ipn_fr; 3017c478bd9Sstevel@tonic-gate int ipn_dsize; 3027c478bd9Sstevel@tonic-gate char ipn_data[4]; 3037c478bd9Sstevel@tonic-gate } nat_save_t; 3047c478bd9Sstevel@tonic-gate 3057c478bd9Sstevel@tonic-gate #define ipn_rule ipn_nat.nat_fr 3067c478bd9Sstevel@tonic-gate 3077c478bd9Sstevel@tonic-gate typedef struct natget { 3087c478bd9Sstevel@tonic-gate void *ng_ptr; 3097c478bd9Sstevel@tonic-gate int ng_sz; 3107c478bd9Sstevel@tonic-gate } natget_t; 3117c478bd9Sstevel@tonic-gate 3127c478bd9Sstevel@tonic-gate 313ab25eeb5Syz #undef tr_flags 3147c478bd9Sstevel@tonic-gate typedef struct nattrpnt { 3157c478bd9Sstevel@tonic-gate struct in_addr tr_dstip; /* real destination IP# */ 3167c478bd9Sstevel@tonic-gate struct in_addr tr_srcip; /* real source IP# */ 3177c478bd9Sstevel@tonic-gate struct in_addr tr_locip; /* local source IP# */ 3187c478bd9Sstevel@tonic-gate u_int tr_flags; 3197c478bd9Sstevel@tonic-gate int tr_expire; 3207c478bd9Sstevel@tonic-gate u_short tr_dstport; /* real destination port# */ 3217c478bd9Sstevel@tonic-gate u_short tr_srcport; /* real source port# */ 3227c478bd9Sstevel@tonic-gate u_short tr_locport; /* local source port# */ 3237c478bd9Sstevel@tonic-gate struct nattrpnt *tr_hnext; 3247c478bd9Sstevel@tonic-gate struct nattrpnt **tr_phnext; 3257c478bd9Sstevel@tonic-gate struct nattrpnt *tr_next; 3267c478bd9Sstevel@tonic-gate struct nattrpnt **tr_pnext; /* previous next */ 3277c478bd9Sstevel@tonic-gate } nattrpnt_t; 3287c478bd9Sstevel@tonic-gate 3297c478bd9Sstevel@tonic-gate #define TN_CMPSIZ offsetof(nattrpnt_t, tr_hnext) 3307c478bd9Sstevel@tonic-gate 3317c478bd9Sstevel@tonic-gate 3327c478bd9Sstevel@tonic-gate /* 3337c478bd9Sstevel@tonic-gate * This structure gets used to help NAT sessions keep the same NAT rule (and 3347c478bd9Sstevel@tonic-gate * thus translation for IP address) when: 3357c478bd9Sstevel@tonic-gate * (a) round-robin redirects are in use 3367c478bd9Sstevel@tonic-gate * (b) different IP add 3377c478bd9Sstevel@tonic-gate */ 3387c478bd9Sstevel@tonic-gate typedef struct hostmap { 3397c478bd9Sstevel@tonic-gate struct hostmap *hm_next; 3407c478bd9Sstevel@tonic-gate struct hostmap **hm_pnext; 341f4b3ec61Sdh struct hostmap *hm_hnext; 342f4b3ec61Sdh struct hostmap **hm_phnext; 3437c478bd9Sstevel@tonic-gate struct ipnat *hm_ipnat; 3447c478bd9Sstevel@tonic-gate struct in_addr hm_srcip; 3457c478bd9Sstevel@tonic-gate struct in_addr hm_dstip; 3467c478bd9Sstevel@tonic-gate struct in_addr hm_mapip; 3477c478bd9Sstevel@tonic-gate u_32_t hm_port; 3487c478bd9Sstevel@tonic-gate int hm_ref; 3497c478bd9Sstevel@tonic-gate } hostmap_t; 3507c478bd9Sstevel@tonic-gate 3517c478bd9Sstevel@tonic-gate 3527c478bd9Sstevel@tonic-gate /* 3537c478bd9Sstevel@tonic-gate * Structure used to pass information in to nat_newmap and nat_newrdr. 3547c478bd9Sstevel@tonic-gate */ 3557c478bd9Sstevel@tonic-gate typedef struct natinfo { 3567c478bd9Sstevel@tonic-gate ipnat_t *nai_np; 3577c478bd9Sstevel@tonic-gate u_32_t nai_sum1; 3587c478bd9Sstevel@tonic-gate u_32_t nai_sum2; 3597c478bd9Sstevel@tonic-gate u_32_t nai_nflags; 3607c478bd9Sstevel@tonic-gate u_32_t nai_flags; 3617c478bd9Sstevel@tonic-gate struct in_addr nai_ip; 3627c478bd9Sstevel@tonic-gate u_short nai_port; 3637c478bd9Sstevel@tonic-gate u_short nai_nport; 3647c478bd9Sstevel@tonic-gate u_short nai_sport; 3657c478bd9Sstevel@tonic-gate u_short nai_dport; 3667c478bd9Sstevel@tonic-gate } natinfo_t; 3677c478bd9Sstevel@tonic-gate 3687c478bd9Sstevel@tonic-gate 3697c478bd9Sstevel@tonic-gate typedef struct natstat { 3707c478bd9Sstevel@tonic-gate u_long ns_mapped[2]; 3717c478bd9Sstevel@tonic-gate u_long ns_rules; 3727c478bd9Sstevel@tonic-gate u_long ns_added; 3737c478bd9Sstevel@tonic-gate u_long ns_expire; 3747c478bd9Sstevel@tonic-gate u_long ns_inuse; 3757c478bd9Sstevel@tonic-gate u_long ns_logged; 3767c478bd9Sstevel@tonic-gate u_long ns_logfail; 3777c478bd9Sstevel@tonic-gate u_long ns_memfail; 3787c478bd9Sstevel@tonic-gate u_long ns_badnat; 3797c478bd9Sstevel@tonic-gate u_long ns_addtrpnt; 3807c478bd9Sstevel@tonic-gate nat_t **ns_table[2]; 3817c478bd9Sstevel@tonic-gate hostmap_t **ns_maptable; 3827c478bd9Sstevel@tonic-gate ipnat_t *ns_list; 3837c478bd9Sstevel@tonic-gate void *ns_apslist; 3847c478bd9Sstevel@tonic-gate u_int ns_wilds; 3857c478bd9Sstevel@tonic-gate u_int ns_nattab_sz; 386ab25eeb5Syz u_int ns_nattab_max; 3877c478bd9Sstevel@tonic-gate u_int ns_rultab_sz; 3887c478bd9Sstevel@tonic-gate u_int ns_rdrtab_sz; 3897c478bd9Sstevel@tonic-gate u_int ns_trpntab_sz; 3907c478bd9Sstevel@tonic-gate u_int ns_hostmap_sz; 3917c478bd9Sstevel@tonic-gate nat_t *ns_instances; 3927c478bd9Sstevel@tonic-gate nattrpnt_t *ns_trpntlist; 393f4b3ec61Sdh hostmap_t *ns_maplist; 3947c478bd9Sstevel@tonic-gate u_long *ns_bucketlen[2]; 3957c478bd9Sstevel@tonic-gate } natstat_t; 3967c478bd9Sstevel@tonic-gate 3977c478bd9Sstevel@tonic-gate typedef struct natlog { 3987c478bd9Sstevel@tonic-gate struct in_addr nl_origip; 3997c478bd9Sstevel@tonic-gate struct in_addr nl_outip; 4007c478bd9Sstevel@tonic-gate struct in_addr nl_inip; 4017c478bd9Sstevel@tonic-gate u_short nl_origport; 4027c478bd9Sstevel@tonic-gate u_short nl_outport; 4037c478bd9Sstevel@tonic-gate u_short nl_inport; 4047c478bd9Sstevel@tonic-gate u_short nl_type; 4057c478bd9Sstevel@tonic-gate int nl_rule; 4067c478bd9Sstevel@tonic-gate U_QUAD_T nl_pkts[2]; 4077c478bd9Sstevel@tonic-gate U_QUAD_T nl_bytes[2]; 4087c478bd9Sstevel@tonic-gate u_char nl_p; 4097c478bd9Sstevel@tonic-gate } natlog_t; 4107c478bd9Sstevel@tonic-gate 4117c478bd9Sstevel@tonic-gate 4127c478bd9Sstevel@tonic-gate #define NL_NEWMAP NAT_MAP 4137c478bd9Sstevel@tonic-gate #define NL_NEWRDR NAT_REDIRECT 4147c478bd9Sstevel@tonic-gate #define NL_NEWBIMAP NAT_BIMAP 4157c478bd9Sstevel@tonic-gate #define NL_NEWBLOCK NAT_MAPBLK 4167c478bd9Sstevel@tonic-gate #define NL_CLONE 0xfffd 4177c478bd9Sstevel@tonic-gate #define NL_FLUSH 0xfffe 4187c478bd9Sstevel@tonic-gate #define NL_EXPIRE 0xffff 4197c478bd9Sstevel@tonic-gate 4207c478bd9Sstevel@tonic-gate #define NAT_HASH_FN(k,l,m) (((k) + ((k) >> 12) + l) % (m)) 4217c478bd9Sstevel@tonic-gate 4227c478bd9Sstevel@tonic-gate #define LONG_SUM(in) (((in) & 0xffff) + ((in) >> 16)) 4237c478bd9Sstevel@tonic-gate 4247c478bd9Sstevel@tonic-gate #define CALC_SUMD(s1, s2, sd) { \ 4257c478bd9Sstevel@tonic-gate (s1) = ((s1) & 0xffff) + ((s1) >> 16); \ 4267c478bd9Sstevel@tonic-gate (s2) = ((s2) & 0xffff) + ((s2) >> 16); \ 4277c478bd9Sstevel@tonic-gate /* Do it twice */ \ 4287c478bd9Sstevel@tonic-gate (s1) = ((s1) & 0xffff) + ((s1) >> 16); \ 4297c478bd9Sstevel@tonic-gate (s2) = ((s2) & 0xffff) + ((s2) >> 16); \ 4307c478bd9Sstevel@tonic-gate /* Because ~1 == -2, We really need ~1 == -1 */ \ 4317c478bd9Sstevel@tonic-gate if ((s1) > (s2)) (s2)--; \ 4327c478bd9Sstevel@tonic-gate (sd) = (s2) - (s1); \ 4337c478bd9Sstevel@tonic-gate (sd) = ((sd) & 0xffff) + ((sd) >> 16); } 4347c478bd9Sstevel@tonic-gate 4357c478bd9Sstevel@tonic-gate #define NAT_SYSSPACE 0x80000000 4367c478bd9Sstevel@tonic-gate #define NAT_LOCKHELD 0x40000000 4377c478bd9Sstevel@tonic-gate 438f4b3ec61Sdh extern void fr_natsync __P((void *, ipf_stack_t *)); 439f4b3ec61Sdh extern void fr_nataddrsync __P((void *, struct in_addr *, ipf_stack_t *)); 440f4b3ec61Sdh extern void fr_natifpsync __P((int, void *, char *, ipf_stack_t *)); 4417c478bd9Sstevel@tonic-gate 4427c478bd9Sstevel@tonic-gate #if defined(__OpenBSD__) 443f4b3ec61Sdh extern void nat_ifdetach __P((void *, ipf_stack_t *)); 4447c478bd9Sstevel@tonic-gate #endif 445f4b3ec61Sdh extern int fr_nat_ioctl __P((caddr_t, ioctlcmd_t, int, int, void *, ipf_stack_t *)); 446f4b3ec61Sdh extern int fr_natinit __P((ipf_stack_t *)); 4477c478bd9Sstevel@tonic-gate extern nat_t *nat_new __P((fr_info_t *, ipnat_t *, nat_t **, u_int, int)); 4487c478bd9Sstevel@tonic-gate extern nat_t *nat_outlookup __P((fr_info_t *, u_int, u_int, struct in_addr, 4497c478bd9Sstevel@tonic-gate struct in_addr)); 4507c478bd9Sstevel@tonic-gate extern void fix_datacksum __P((u_short *, u_32_t)); 4517c478bd9Sstevel@tonic-gate extern nat_t *nat_inlookup __P((fr_info_t *, u_int, u_int, struct in_addr, 4527c478bd9Sstevel@tonic-gate struct in_addr)); 4537c478bd9Sstevel@tonic-gate extern nat_t *nat_tnlookup __P((fr_info_t *, int)); 4547c478bd9Sstevel@tonic-gate extern nat_t *nat_maplookup __P((void *, u_int, struct in_addr, 4557c478bd9Sstevel@tonic-gate struct in_addr)); 456f4b3ec61Sdh extern nat_t *nat_lookupredir __P((natlookup_t *, ipf_stack_t *)); 4577c478bd9Sstevel@tonic-gate extern nat_t *nat_icmperrorlookup __P((fr_info_t *, int)); 4587c478bd9Sstevel@tonic-gate extern nat_t *nat_icmperror __P((fr_info_t *, u_int *, int)); 459f4b3ec61Sdh extern int nat_insert __P((nat_t *, int, ipf_stack_t *)); 4607c478bd9Sstevel@tonic-gate 4617c478bd9Sstevel@tonic-gate extern int fr_checknatout __P((fr_info_t *, u_32_t *)); 4627c478bd9Sstevel@tonic-gate extern int fr_natout __P((fr_info_t *, nat_t *, int, u_32_t)); 4637c478bd9Sstevel@tonic-gate extern int fr_checknatin __P((fr_info_t *, u_32_t *)); 4647c478bd9Sstevel@tonic-gate extern int fr_natin __P((fr_info_t *, nat_t *, int, u_32_t)); 465f4b3ec61Sdh extern void fr_natunload __P((ipf_stack_t *)); 466f4b3ec61Sdh extern void fr_natexpire __P((ipf_stack_t *)); 467f4b3ec61Sdh extern void nat_log __P((struct nat *, u_int, ipf_stack_t *)); 468381a2a9aSdr extern void fix_incksum __P((u_short *, u_32_t)); 469381a2a9aSdr extern void fix_outcksum __P((u_short *, u_32_t)); 470f4b3ec61Sdh extern void fr_ipnatderef __P((ipnat_t **, ipf_stack_t *)); 471f4b3ec61Sdh extern void fr_natderef __P((nat_t **, ipf_stack_t *)); 4727c478bd9Sstevel@tonic-gate extern u_short *nat_proto __P((fr_info_t *, nat_t *, u_int)); 4737c478bd9Sstevel@tonic-gate extern void nat_update __P((fr_info_t *, nat_t *, ipnat_t *)); 474f4b3ec61Sdh extern void fr_setnatqueue __P((nat_t *, int, ipf_stack_t *)); 475f4b3ec61Sdh extern void fr_hostmapderef __P((hostmap_t **)); 4767c478bd9Sstevel@tonic-gate 4777c478bd9Sstevel@tonic-gate #endif /* __IP_NAT_H__ */ 478