1145522Sdarrenr/* $FreeBSD$ */ 2145522Sdarrenr 353642Sguido/* 4255332Scy * Copyright (C) 2012 by Darren Reed. 553642Sguido * 680482Sdarrenr * See the IPFILTER.LICENCE file for details on licencing. 753642Sguido * 853642Sguido * @(#)ip_nat.h 1.5 2/4/96 957126Sguido * $FreeBSD$ 10172776Sdarrenr * Id: ip_nat.h,v 2.90.2.20 2007/09/25 08:27:32 darrenr Exp $ 1153642Sguido */ 1253642Sguido 1353642Sguido#ifndef __IP_NAT_H__ 1453642Sguido#define __IP_NAT_H__ 1553642Sguido 1653642Sguido#ifndef SOLARIS 17145522Sdarrenr#define SOLARIS (defined(sun) && (defined(__svr4__) || defined(__SVR4))) 1853642Sguido#endif 1953642Sguido 20153876Sguido#if defined(__STDC__) || defined(__GNUC__) || defined(_AIX51) 21145522Sdarrenr#define SIOCADNAT _IOW('r', 60, struct ipfobj) 22145522Sdarrenr#define SIOCRMNAT _IOW('r', 61, struct ipfobj) 23145522Sdarrenr#define SIOCGNATS _IOWR('r', 62, struct ipfobj) 24145522Sdarrenr#define SIOCGNATL _IOWR('r', 63, struct ipfobj) 25255332Scy#define SIOCPURGENAT _IOWR('r', 100, struct ipfobj) 2653642Sguido#else 27145522Sdarrenr#define SIOCADNAT _IOW(r, 60, struct ipfobj) 28145522Sdarrenr#define SIOCRMNAT _IOW(r, 61, struct ipfobj) 29145522Sdarrenr#define SIOCGNATS _IOWR(r, 62, struct ipfobj) 30145522Sdarrenr#define SIOCGNATL _IOWR(r, 63, struct ipfobj) 31255332Scy#define SIOCPURGENAT _IOWR(r, 100, struct ipfobj) 3253642Sguido#endif 3353642Sguido 34145522Sdarrenr#undef LARGE_NAT /* define this if you're setting up a system to NAT 3553642Sguido * LARGE numbers of networks/hosts - i.e. in the 3653642Sguido * hundreds or thousands. In such a case, you should 3753642Sguido * also change the RDR_SIZE and NAT_SIZE below to more 3853642Sguido * appropriate sizes. The figures below were used for 3953642Sguido * a setup with 1000-2000 networks to NAT. 4053642Sguido */ 41145522Sdarrenr#ifndef NAT_SIZE 42145522Sdarrenr# ifdef LARGE_NAT 43130886Sdarrenr# define NAT_SIZE 2047 44130886Sdarrenr# else 45130886Sdarrenr# define NAT_SIZE 127 46130886Sdarrenr# endif 4780482Sdarrenr#endif 48145522Sdarrenr#ifndef RDR_SIZE 49145522Sdarrenr# ifdef LARGE_NAT 50130886Sdarrenr# define RDR_SIZE 2047 51130886Sdarrenr# else 52130886Sdarrenr# define RDR_SIZE 127 53130886Sdarrenr# endif 5480482Sdarrenr#endif 55145522Sdarrenr#ifndef HOSTMAP_SIZE 56145522Sdarrenr# ifdef LARGE_NAT 57130886Sdarrenr# define HOSTMAP_SIZE 8191 58130886Sdarrenr# else 59130886Sdarrenr# define HOSTMAP_SIZE 2047 60130886Sdarrenr# endif 6180482Sdarrenr#endif 62130886Sdarrenr#ifndef NAT_TABLE_MAX 63145522Sdarrenr/* 64145522Sdarrenr * This is newly introduced and for the sake of "least surprise", the numbers 65145522Sdarrenr * present aren't what we'd normally use for creating a proper hash table. 66145522Sdarrenr */ 67130886Sdarrenr# ifdef LARGE_NAT 68130886Sdarrenr# define NAT_TABLE_MAX 180000 69130886Sdarrenr# else 70130886Sdarrenr# define NAT_TABLE_MAX 30000 71130886Sdarrenr# endif 72130886Sdarrenr#endif 73145522Sdarrenr#ifndef NAT_TABLE_SZ 74145522Sdarrenr# ifdef LARGE_NAT 75130886Sdarrenr# define NAT_TABLE_SZ 16383 76130886Sdarrenr# else 77130886Sdarrenr# define NAT_TABLE_SZ 2047 78130886Sdarrenr# endif 7980482Sdarrenr#endif 8053642Sguido#ifndef APR_LABELLEN 8153642Sguido#define APR_LABELLEN 16 8253642Sguido#endif 83255332Scy#define NAT_HW_CKSUM 0x80000000 84255332Scy#define NAT_HW_CKSUM_PART 0x40000000 8553642Sguido 8653642Sguido#define DEF_NAT_AGE 1200 /* 10 minutes (600 seconds) */ 8753642Sguido 88145522Sdarrenrstruct ipstate; 8960852Sdarrenrstruct ap_session; 9060852Sdarrenr 91255332Scy/* 92255332Scy * This structure is used in the active NAT table and represents an 93255332Scy * active NAT session. 94255332Scy */ 9553642Sguidotypedef struct nat { 96145522Sdarrenr ipfmutex_t nat_lock; 9753642Sguido struct nat *nat_next; 98145522Sdarrenr struct nat **nat_pnext; 9953642Sguido struct nat *nat_hnext[2]; 10067614Sdarrenr struct nat **nat_phnext[2]; 101145522Sdarrenr struct hostmap *nat_hm; 102145522Sdarrenr void *nat_data; 10392685Sdarrenr struct nat **nat_me; 104145522Sdarrenr struct ipstate *nat_state; 105145522Sdarrenr struct ap_session *nat_aps; /* proxy session */ 106145522Sdarrenr frentry_t *nat_fr; /* filter rule ptr if appropriate */ 107145522Sdarrenr struct ipnat *nat_ptr; /* pointer back to the rule */ 108145522Sdarrenr void *nat_ifps[2]; 109145522Sdarrenr void *nat_sync; 110145522Sdarrenr ipftqent_t nat_tqe; 111255332Scy int nat_mtu[2]; 112145522Sdarrenr u_32_t nat_flags; 113145522Sdarrenr u_32_t nat_sumd[2]; /* ip checksum delta for data segment*/ 114145522Sdarrenr u_32_t nat_ipsumd; /* ip checksum delta for ip header */ 115145522Sdarrenr u_32_t nat_mssclamp; /* if != zero clamp MSS to this */ 116255332Scy i6addr_t nat_odst6; 117255332Scy i6addr_t nat_osrc6; 118255332Scy i6addr_t nat_ndst6; 119255332Scy i6addr_t nat_nsrc6; 120145522Sdarrenr U_QUAD_T nat_pkts[2]; 121145522Sdarrenr U_QUAD_T nat_bytes[2]; 122145522Sdarrenr union { 123145522Sdarrenr udpinfo_t nat_unu; 124145522Sdarrenr tcpinfo_t nat_unt; 125145522Sdarrenr icmpinfo_t nat_uni; 126145522Sdarrenr greinfo_t nat_ugre; 127255332Scy } nat_unold, nat_unnew; 128255332Scy int nat_use; 129255332Scy int nat_pr[2]; /* protocol for NAT */ 130145522Sdarrenr int nat_dir; 131145522Sdarrenr int nat_ref; /* reference count */ 132255332Scy u_int nat_hv[2]; 133145522Sdarrenr char nat_ifnames[2][LIFNAMSIZ]; 134145522Sdarrenr int nat_rev; /* 0 = forward, 1 = reverse */ 135255332Scy int nat_dlocal; 136255332Scy int nat_v[2]; /* 0 = old, 1 = new */ 137255332Scy u_int nat_redir; /* copy of in_redir */ 13853642Sguido} nat_t; 13953642Sguido 140255332Scy#define nat_osrcip nat_osrc6.in4 141255332Scy#define nat_odstip nat_odst6.in4 142255332Scy#define nat_nsrcip nat_nsrc6.in4 143255332Scy#define nat_ndstip nat_ndst6.in4 144255332Scy#define nat_osrcaddr nat_osrc6.in4.s_addr 145255332Scy#define nat_odstaddr nat_odst6.in4.s_addr 146255332Scy#define nat_nsrcaddr nat_nsrc6.in4.s_addr 147255332Scy#define nat_ndstaddr nat_ndst6.in4.s_addr 148145522Sdarrenr#define nat_age nat_tqe.tqe_die 149255332Scy#define nat_osport nat_unold.nat_unt.ts_sport 150255332Scy#define nat_odport nat_unold.nat_unt.ts_dport 151255332Scy#define nat_nsport nat_unnew.nat_unt.ts_sport 152255332Scy#define nat_ndport nat_unnew.nat_unt.ts_dport 153255332Scy#define nat_oicmpid nat_unold.nat_uni.ici_id 154255332Scy#define nat_nicmpid nat_unnew.nat_uni.ici_id 155255332Scy#define nat_type nat_unold.nat_uni.ici_type 156255332Scy#define nat_oseq nat_unold.nat_uni.ici_seq 157255332Scy#define nat_nseq nat_unnew.nat_uni.ici_seq 158145522Sdarrenr#define nat_tcpstate nat_tqe.tqe_state 159170268Sdarrenr#define nat_die nat_tqe.tqe_die 160170268Sdarrenr#define nat_touched nat_tqe.tqe_touched 161145522Sdarrenr 162145522Sdarrenr/* 163145522Sdarrenr * Values for nat_dir 164145522Sdarrenr */ 165145522Sdarrenr#define NAT_INBOUND 0 166145522Sdarrenr#define NAT_OUTBOUND 1 167255332Scy#define NAT_ENCAPIN 2 168255332Scy#define NAT_ENCAPOUT 3 169255332Scy#define NAT_DIVERTIN 4 170255332Scy#define NAT_DIVERTOUT 5 171145522Sdarrenr 172145522Sdarrenr/* 173145522Sdarrenr * Definitions for nat_flags 174145522Sdarrenr */ 175145522Sdarrenr#define NAT_TCP 0x0001 /* IPN_TCP */ 176145522Sdarrenr#define NAT_UDP 0x0002 /* IPN_UDP */ 177145522Sdarrenr#define NAT_ICMPERR 0x0004 /* IPN_ICMPERR */ 178145522Sdarrenr#define NAT_ICMPQUERY 0x0008 /* IPN_ICMPQUERY */ 179145522Sdarrenr#define NAT_SEARCH 0x0010 180145522Sdarrenr#define NAT_SLAVE 0x0020 /* Slave connection for a proxy */ 181170268Sdarrenr#define NAT_NOTRULEPORT 0x0040 /* Don't use the port # in the NAT rule */ 182145522Sdarrenr 183145522Sdarrenr#define NAT_TCPUDP (NAT_TCP|NAT_UDP) 184145522Sdarrenr#define NAT_TCPUDPICMP (NAT_TCP|NAT_UDP|NAT_ICMPERR) 185145522Sdarrenr#define NAT_TCPUDPICMPQ (NAT_TCP|NAT_UDP|NAT_ICMPQUERY) 186145522Sdarrenr#define NAT_FROMRULE (NAT_TCP|NAT_UDP) 187145522Sdarrenr 188145522Sdarrenr/* 0x0100 reserved for FI_W_SPORT */ 189145522Sdarrenr/* 0x0200 reserved for FI_W_DPORT */ 190145522Sdarrenr/* 0x0400 reserved for FI_W_SADDR */ 191145522Sdarrenr/* 0x0800 reserved for FI_W_DADDR */ 192145522Sdarrenr/* 0x1000 reserved for FI_W_NEWFR */ 193145522Sdarrenr/* 0x2000 reserved for SI_CLONE */ 194145522Sdarrenr/* 0x4000 reserved for SI_CLONED */ 195145522Sdarrenr/* 0x8000 reserved for SI_IGNOREPKT */ 196145522Sdarrenr 197145522Sdarrenr#define NAT_DEBUG 0x800000 198145522Sdarrenr 199255332Scytypedef struct nat_addr_s { 200255332Scy i6addr_t na_addr[2]; 201255332Scy i6addr_t na_nextaddr; 202255332Scy int na_atype; 203255332Scy int na_function; 204255332Scy} nat_addr_t; 205255332Scy 206255332Scy#define na_nextip na_nextaddr.in4.s_addr 207255332Scy#define na_nextip6 na_nextaddr.in6 208255332Scy#define na_num na_addr[0].iplookupnum 209255332Scy#define na_type na_addr[0].iplookuptype 210255332Scy#define na_subtype na_addr[0].iplookupsubtype 211255332Scy#define na_ptr na_addr[1].iplookupptr 212255332Scy#define na_func na_addr[1].iplookupfunc 213255332Scy 214255332Scy 215255332Scy/* 216255332Scy * This structure represents an actual NAT rule, loaded by ipnat. 217255332Scy */ 21853642Sguidotypedef struct ipnat { 219170268Sdarrenr ipfmutex_t in_lock; 220145522Sdarrenr struct ipnat *in_next; /* NAT rule list next */ 221255332Scy struct ipnat **in_pnext; /* prior rdr next ptr */ 222145522Sdarrenr struct ipnat *in_rnext; /* rdr rule hash next */ 223145522Sdarrenr struct ipnat **in_prnext; /* prior rdr next ptr */ 224145522Sdarrenr struct ipnat *in_mnext; /* map rule hash next */ 225145522Sdarrenr struct ipnat **in_pmnext; /* prior map next ptr */ 226145522Sdarrenr struct ipftq *in_tqehead[2]; 227145522Sdarrenr void *in_ifps[2]; 228145522Sdarrenr void *in_apr; 229145522Sdarrenr char *in_comment; 230255332Scy mb_t *in_divmp; 231255332Scy void *in_pconf; 232255332Scy U_QUAD_T in_pkts[2]; 233255332Scy U_QUAD_T in_bytes[2]; 234145522Sdarrenr u_long in_space; 235145522Sdarrenr u_long in_hits; 236255332Scy int in_size; 237255332Scy int in_use; 238255332Scy u_int in_hv[2]; 239145522Sdarrenr int in_flineno; /* conf. file line number */ 240255332Scy int in_stepnext; 241255332Scy int in_dlocal; 242255332Scy u_short in_dpnext; 243255332Scy u_short in_spnext; 244145522Sdarrenr /* From here to the end is covered by IPN_CMPSIZ */ 245255332Scy u_char in_v[2]; /* 0 = old, 1 = new */ 246145522Sdarrenr u_32_t in_flags; 247145522Sdarrenr u_32_t in_mssclamp; /* if != 0 clamp MSS to this */ 248145522Sdarrenr u_int in_age[2]; 249145522Sdarrenr int in_redir; /* see below for values */ 250255332Scy int in_pr[2]; /* protocol. */ 251255332Scy nat_addr_t in_ndst; 252255332Scy nat_addr_t in_nsrc; 253255332Scy nat_addr_t in_osrc; 254255332Scy nat_addr_t in_odst; 255145522Sdarrenr frtuc_t in_tuc; 256145522Sdarrenr u_short in_ppip; /* ports per IP. */ 257145522Sdarrenr u_short in_ippip; /* IP #'s per IP# */ 258255332Scy u_short in_ndports[2]; 259255332Scy u_short in_nsports[2]; 260255332Scy int in_ifnames[2]; 261255332Scy int in_plabel; /* proxy label. */ 262255332Scy int in_pconfig; /* proxy label. */ 263145522Sdarrenr ipftag_t in_tag; 264255332Scy int in_namelen; 265255332Scy char in_names[1]; 26653642Sguido} ipnat_t; 26753642Sguido 268255332Scy/* 269255332Scy * MAP-IN MAP-OUT RDR-IN RDR-OUT 270255332Scy * osrc X == src == src X 271255332Scy * odst X == dst == dst X 272255332Scy * nsrc == dst X X == dst 273255332Scy * ndst == src X X == src 274255332Scy */ 275255332Scy#define in_dpmin in_ndports[0] /* Also holds static redir port */ 276255332Scy#define in_dpmax in_ndports[1] 277255332Scy#define in_spmin in_nsports[0] /* Also holds static redir port */ 278255332Scy#define in_spmax in_nsports[1] 279255332Scy#define in_ndport in_ndports[0] 280255332Scy#define in_nsport in_nsports[0] 281255332Scy#define in_dipnext in_ndst.na_nextaddr.in4 282255332Scy#define in_dipnext6 in_ndst.na_nextaddr 283255332Scy#define in_dnip in_ndst.na_nextaddr.in4.s_addr 284255332Scy#define in_dnip6 in_ndst.na_nextaddr 285255332Scy#define in_sipnext in_nsrc.na_nextaddr.in4 286255332Scy#define in_snip in_nsrc.na_nextaddr.in4.s_addr 287255332Scy#define in_snip6 in_nsrc.na_nextaddr 288255332Scy#define in_odstip in_odst.na_addr[0].in4 289255332Scy#define in_odstip6 in_odst.na_addr[0] 290255332Scy#define in_odstaddr in_odst.na_addr[0].in4.s_addr 291255332Scy#define in_odstmsk in_odst.na_addr[1].in4.s_addr 292255332Scy#define in_odstmsk6 in_odst.na_addr[1] 293255332Scy#define in_odstatype in_odst.na_atype 294255332Scy#define in_osrcip in_osrc.na_addr[0].in4 295255332Scy#define in_osrcip6 in_osrc.na_addr[0] 296255332Scy#define in_osrcaddr in_osrc.na_addr[0].in4.s_addr 297255332Scy#define in_osrcmsk in_osrc.na_addr[1].in4.s_addr 298255332Scy#define in_osrcmsk6 in_osrc.na_addr[1] 299255332Scy#define in_osrcatype in_osrc.na_atype 300255332Scy#define in_ndstip in_ndst.na_addr[0].in4 301255332Scy#define in_ndstip6 in_ndst.na_addr[0] 302255332Scy#define in_ndstaddr in_ndst.na_addr[0].in4.s_addr 303255332Scy#define in_ndstmsk in_ndst.na_addr[1].in4.s_addr 304255332Scy#define in_ndstmsk6 in_ndst.na_addr[1] 305255332Scy#define in_ndstatype in_ndst.na_atype 306255332Scy#define in_ndstafunc in_ndst.na_function 307255332Scy#define in_nsrcip in_nsrc.na_addr[0].in4 308255332Scy#define in_nsrcip6 in_nsrc.na_addr[0] 309255332Scy#define in_nsrcaddr in_nsrc.na_addr[0].in4.s_addr 310255332Scy#define in_nsrcmsk in_nsrc.na_addr[1].in4.s_addr 311255332Scy#define in_nsrcmsk6 in_nsrc.na_addr[1] 312255332Scy#define in_nsrcatype in_nsrc.na_atype 313255332Scy#define in_nsrcafunc in_nsrc.na_function 31460852Sdarrenr#define in_scmp in_tuc.ftu_scmp 31560852Sdarrenr#define in_dcmp in_tuc.ftu_dcmp 31660852Sdarrenr#define in_stop in_tuc.ftu_stop 31760852Sdarrenr#define in_dtop in_tuc.ftu_dtop 318255332Scy#define in_osport in_tuc.ftu_sport 319255332Scy#define in_odport in_tuc.ftu_dport 320255332Scy#define in_ndstnum in_ndst.na_addr[0].iplookupnum 321255332Scy#define in_ndsttype in_ndst.na_addr[0].iplookuptype 322255332Scy#define in_ndstptr in_ndst.na_addr[1].iplookupptr 323255332Scy#define in_ndstfunc in_ndst.na_addr[1].iplookupfunc 324255332Scy#define in_nsrcnum in_nsrc.na_addr[0].iplookupnum 325255332Scy#define in_nsrctype in_nsrc.na_addr[0].iplookuptype 326255332Scy#define in_nsrcptr in_nsrc.na_addr[1].iplookupptr 327255332Scy#define in_nsrcfunc in_nsrc.na_addr[1].iplookupfunc 328255332Scy#define in_odstnum in_odst.na_addr[0].iplookupnum 329255332Scy#define in_odsttype in_odst.na_addr[0].iplookuptype 330255332Scy#define in_odstptr in_odst.na_addr[1].iplookupptr 331255332Scy#define in_odstfunc in_odst.na_addr[1].iplookupfunc 332255332Scy#define in_osrcnum in_osrc.na_addr[0].iplookupnum 333255332Scy#define in_osrctype in_osrc.na_addr[0].iplookuptype 334255332Scy#define in_osrcptr in_osrc.na_addr[1].iplookupptr 335255332Scy#define in_osrcfunc in_osrc.na_addr[1].iplookupfunc 336255332Scy#define in_icmpidmin in_nsports[0] 337255332Scy#define in_icmpidmax in_nsports[1] 33853642Sguido 339145522Sdarrenr/* 340145522Sdarrenr * Bit definitions for in_flags 341145522Sdarrenr */ 342145522Sdarrenr#define IPN_ANY 0x00000 343145522Sdarrenr#define IPN_TCP 0x00001 344145522Sdarrenr#define IPN_UDP 0x00002 345145522Sdarrenr#define IPN_TCPUDP (IPN_TCP|IPN_UDP) 346145522Sdarrenr#define IPN_ICMPERR 0x00004 347145522Sdarrenr#define IPN_TCPUDPICMP (IPN_TCP|IPN_UDP|IPN_ICMPERR) 348145522Sdarrenr#define IPN_ICMPQUERY 0x00008 349145522Sdarrenr#define IPN_TCPUDPICMPQ (IPN_TCP|IPN_UDP|IPN_ICMPQUERY) 350145522Sdarrenr#define IPN_RF (IPN_TCPUDP|IPN_DELETE|IPN_ICMPERR) 351145522Sdarrenr#define IPN_AUTOPORTMAP 0x00010 352255332Scy#define IPN_FILTER 0x00020 353255332Scy#define IPN_SPLIT 0x00040 354255332Scy#define IPN_ROUNDR 0x00080 355255332Scy#define IPN_SIPRANGE 0x00100 356255332Scy#define IPN_DIPRANGE 0x00200 357255332Scy#define IPN_NOTSRC 0x00400 358255332Scy#define IPN_NOTDST 0x00800 359255332Scy#define IPN_NO 0x01000 360255332Scy#define IPN_DYNSRCIP 0x02000 /* dynamic src IP# */ 361255332Scy#define IPN_DYNDSTIP 0x04000 /* dynamic dst IP# */ 362255332Scy#define IPN_DELETE 0x08000 363255332Scy#define IPN_STICKY 0x10000 364255332Scy#define IPN_FRAG 0x20000 365255332Scy#define IPN_FIXEDSPORT 0x40000 366255332Scy#define IPN_FIXEDDPORT 0x80000 367255332Scy#define IPN_FINDFORWARD 0x100000 368255332Scy#define IPN_IN 0x200000 369255332Scy#define IPN_SEQUENTIAL 0x400000 370255332Scy#define IPN_PURGE 0x800000 371255332Scy#define IPN_PROXYRULE 0x1000000 372255332Scy#define IPN_USERFLAGS (IPN_TCPUDP|IPN_AUTOPORTMAP|IPN_SIPRANGE|IPN_SPLIT|\ 373255332Scy IPN_ROUNDR|IPN_FILTER|IPN_NOTSRC|IPN_NOTDST|IPN_NO|\ 374180778Sdarrenr IPN_FRAG|IPN_STICKY|IPN_FIXEDDPORT|IPN_ICMPQUERY|\ 375255332Scy IPN_DIPRANGE|IPN_SEQUENTIAL|IPN_PURGE) 37653642Sguido 377145522Sdarrenr/* 378145522Sdarrenr * Values for in_redir 379145522Sdarrenr */ 38053642Sguido#define NAT_MAP 0x01 38153642Sguido#define NAT_REDIRECT 0x02 38253642Sguido#define NAT_BIMAP (NAT_MAP|NAT_REDIRECT) 38353642Sguido#define NAT_MAPBLK 0x04 384255332Scy#define NAT_REWRITE 0x08 385255332Scy#define NAT_ENCAP 0x10 386255332Scy#define NAT_DIVERTUDP 0x20 38753642Sguido 38853642Sguido#define MAPBLK_MINPORT 1024 /* don't use reserved ports for src port */ 38953642Sguido#define USABLE_PORTS (65536 - MAPBLK_MINPORT) 39053642Sguido 391255332Scy#define IPN_CMPSIZ (sizeof(ipnat_t) - offsetof(ipnat_t, in_v)) 39253642Sguido 39353642Sguidotypedef struct natlookup { 394255332Scy i6addr_t nl_inipaddr; 395255332Scy i6addr_t nl_outipaddr; 396255332Scy i6addr_t nl_realipaddr; 397255332Scy int nl_v; 398255332Scy int nl_flags; 399255332Scy u_short nl_inport; 400255332Scy u_short nl_outport; 401255332Scy u_short nl_realport; 40253642Sguido} natlookup_t; 40353642Sguido 404255332Scy#define nl_inip nl_inipaddr.in4 405255332Scy#define nl_outip nl_outipaddr.in4 406255332Scy#define nl_realip nl_realipaddr.in4 407255332Scy#define nl_inip6 nl_inipaddr.in6 408255332Scy#define nl_outip6 nl_outipaddr.in6 409255332Scy#define nl_realip6 nl_realipaddr.in6 41060852Sdarrenr 411255332Scy 41260852Sdarrenrtypedef struct nat_save { 41360852Sdarrenr void *ipn_next; 41460852Sdarrenr struct nat ipn_nat; 41560852Sdarrenr struct ipnat ipn_ipnat; 41660852Sdarrenr struct frentry ipn_fr; 41760852Sdarrenr int ipn_dsize; 41860852Sdarrenr char ipn_data[4]; 41960852Sdarrenr} nat_save_t; 42060852Sdarrenr 42160852Sdarrenr#define ipn_rule ipn_nat.nat_fr 42260852Sdarrenr 42360852Sdarrenrtypedef struct natget { 42460852Sdarrenr void *ng_ptr; 42560852Sdarrenr int ng_sz; 42660852Sdarrenr} natget_t; 42760852Sdarrenr 42860852Sdarrenr 429145522Sdarrenr/* 430145522Sdarrenr * This structure gets used to help NAT sessions keep the same NAT rule (and 431145522Sdarrenr * thus translation for IP address) when: 432145522Sdarrenr * (a) round-robin redirects are in use 433145522Sdarrenr * (b) different IP add 434145522Sdarrenr */ 43560852Sdarrenrtypedef struct hostmap { 436170268Sdarrenr struct hostmap *hm_hnext; 437170268Sdarrenr struct hostmap **hm_phnext; 43860852Sdarrenr struct hostmap *hm_next; 43960852Sdarrenr struct hostmap **hm_pnext; 44060852Sdarrenr struct ipnat *hm_ipnat; 441255332Scy i6addr_t hm_osrcip6; 442255332Scy i6addr_t hm_odstip6; 443255332Scy i6addr_t hm_nsrcip6; 444255332Scy i6addr_t hm_ndstip6; 445145522Sdarrenr u_32_t hm_port; 446145522Sdarrenr int hm_ref; 447255332Scy int hm_hv; 448255332Scy int hm_v; 44960852Sdarrenr} hostmap_t; 45060852Sdarrenr 451255332Scy#define hm_osrcip hm_osrcip6.in4 452255332Scy#define hm_odstip hm_odstip6.in4 453255332Scy#define hm_nsrcip hm_nsrcip6.in4 454255332Scy#define hm_ndstip hm_ndstip6.in4 455255332Scy#define hm_osrc6 hm_osrcip6.in6 456255332Scy#define hm_odst6 hm_odstip6.in6 457255332Scy#define hm_nsrc6 hm_nsrcip6.in6 458255332Scy#define hm_ndst6 hm_ndstip6.in6 45960852Sdarrenr 460255332Scy 461145522Sdarrenr/* 462145522Sdarrenr * Structure used to pass information in to nat_newmap and nat_newrdr. 463145522Sdarrenr */ 464145522Sdarrenrtypedef struct natinfo { 465145522Sdarrenr ipnat_t *nai_np; 466145522Sdarrenr u_32_t nai_sum1; 467145522Sdarrenr u_32_t nai_sum2; 468255332Scy struct in_addr nai_ip; /* In host byte order */ 469145522Sdarrenr u_short nai_port; 470145522Sdarrenr u_short nai_nport; 471145522Sdarrenr u_short nai_sport; 472145522Sdarrenr u_short nai_dport; 473145522Sdarrenr} natinfo_t; 474145522Sdarrenr 475145522Sdarrenr 476255332Scytypedef struct nat_stat_side { 477255332Scy u_int *ns_bucketlen; 478255332Scy nat_t **ns_table; 47953642Sguido u_long ns_added; 480255332Scy u_long ns_appr_fail; 481255332Scy u_long ns_badnat; 482255332Scy u_long ns_badnatnew; 483255332Scy u_long ns_badnextaddr; 484255332Scy u_long ns_bucket_max; 485255332Scy u_long ns_clone_nomem; 486255332Scy u_long ns_decap_bad; 487255332Scy u_long ns_decap_fail; 488255332Scy u_long ns_decap_pullup; 489255332Scy u_long ns_divert_dup; 490255332Scy u_long ns_divert_exist; 491255332Scy u_long ns_drop; 492255332Scy u_long ns_encap_dup; 493255332Scy u_long ns_encap_pullup; 494255332Scy u_long ns_exhausted; 495255332Scy u_long ns_icmp_address; 496255332Scy u_long ns_icmp_basic; 497255332Scy u_long ns_icmp_mbuf; 498255332Scy u_long ns_icmp_notfound; 499255332Scy u_long ns_icmp_rebuild; 500255332Scy u_long ns_icmp_short; 501255332Scy u_long ns_icmp_size; 502255332Scy u_long ns_ifpaddrfail; 503255332Scy u_long ns_ignored; 504255332Scy u_long ns_insert_fail; 50553642Sguido u_long ns_inuse; 506255332Scy u_long ns_log; 507255332Scy u_long ns_lookup_miss; 508255332Scy u_long ns_lookup_nowild; 509255332Scy u_long ns_new_ifpaddr; 51060852Sdarrenr u_long ns_memfail; 511255332Scy u_long ns_table_max; 512255332Scy u_long ns_translated; 513255332Scy u_long ns_unfinalised; 514255332Scy u_long ns_wrap; 515255332Scy u_long ns_xlate_null; 516255332Scy u_long ns_xlate_exists; 517255332Scy u_long ns_ipf_proxy_fail; 518255332Scy u_long ns_uncreate[2]; 519255332Scy} nat_stat_side_t; 520255332Scy 521255332Scy 522255332Scytypedef struct natstat { 523255332Scy nat_t *ns_instances; 524255332Scy ipnat_t *ns_list; 525255332Scy hostmap_t *ns_maplist; 526255332Scy hostmap_t **ns_maptable; 527255332Scy u_int ns_active; 528255332Scy u_long ns_addtrpnt; 529255332Scy u_long ns_divert_build; 530255332Scy u_long ns_expire; 531255332Scy u_long ns_flush_all; 532255332Scy u_long ns_flush_closing; 533255332Scy u_long ns_flush_queue; 534255332Scy u_long ns_flush_state; 535255332Scy u_long ns_flush_timeout; 536255332Scy u_long ns_hm_new; 537255332Scy u_long ns_hm_newfail; 538255332Scy u_long ns_hm_addref; 539255332Scy u_long ns_hm_nullnp; 540255332Scy u_long ns_log_ok; 541255332Scy u_long ns_log_fail; 542255332Scy u_int ns_hostmap_sz; 543255332Scy u_int ns_nattab_sz; 544255332Scy u_int ns_nattab_max; 545255332Scy u_int ns_orphans; 546255332Scy u_int ns_rules; 547255332Scy u_int ns_rules_map; 548255332Scy u_int ns_rules_rdr; 549255332Scy u_int ns_rultab_sz; 550255332Scy u_int ns_rdrtab_sz; 551255332Scy u_32_t ns_ticks; 552255332Scy u_int ns_trpntab_sz; 553255332Scy u_int ns_wilds; 554255332Scy u_long ns_proto[256]; 555255332Scy nat_stat_side_t ns_side[2]; 556255332Scy#ifdef USE_INET6 557255332Scy nat_stat_side_t ns_side6[2]; 558255332Scy#endif 55953642Sguido} natstat_t; 56053642Sguido 56153642Sguidotypedef struct natlog { 562255332Scy i6addr_t nl_osrcip; 563255332Scy i6addr_t nl_odstip; 564255332Scy i6addr_t nl_nsrcip; 565255332Scy i6addr_t nl_ndstip; 566255332Scy u_short nl_osrcport; 567255332Scy u_short nl_odstport; 568255332Scy u_short nl_nsrcport; 569255332Scy u_short nl_ndstport; 570255332Scy int nl_action; 571255332Scy int nl_type; 572255332Scy int nl_rule; 573145522Sdarrenr U_QUAD_T nl_pkts[2]; 574145522Sdarrenr U_QUAD_T nl_bytes[2]; 575255332Scy u_char nl_p[2]; 576255332Scy u_char nl_v[2]; 577255332Scy u_char nl_ifnames[2][LIFNAMSIZ]; 57853642Sguido} natlog_t; 57953642Sguido 58053642Sguido 581255332Scy#define NL_NEW 0 582255332Scy#define NL_CLONE 1 583255332Scy#define NL_PURGE 0xfffc 584255332Scy#define NL_DESTROY 0xfffd 58572006Sdarrenr#define NL_FLUSH 0xfffe 58653642Sguido#define NL_EXPIRE 0xffff 58753642Sguido 588255332Scy#define NAT_HASH_FN(_k,_l,_m) (((_k) + ((_k) >> 12) + _l) % (_m)) 589255332Scy#define NAT_HASH_FN6(_k,_l,_m) ((((u_32_t *)(_k))[3] \ 590255332Scy + (((u_32_t *)(_k))[3] >> 12) \ 591255332Scy + (((u_32_t *)(_k))[2]) \ 592255332Scy + (((u_32_t *)(_k))[2] >> 12) \ 593255332Scy + (((u_32_t *)(_k))[1]) \ 594255332Scy + (((u_32_t *)(_k))[1] >> 12) \ 595255332Scy + (((u_32_t *)(_k))[0]) \ 596255332Scy + (((u_32_t *)(_k))[0] >> 12) \ 597255332Scy + _l) % (_m)) 59853642Sguido 599255332Scy#define LONG_SUM(_i) (((_i) & 0xffff) + ((_i) >> 16)) 600255332Scy#define LONG_SUM6(_i) (LONG_SUM(ntohl(((u_32_t *)(_i))[0])) + \ 601255332Scy LONG_SUM(ntohl(((u_32_t *)(_i))[1])) + \ 602255332Scy LONG_SUM(ntohl(((u_32_t *)(_i))[2])) + \ 603255332Scy LONG_SUM(ntohl(((u_32_t *)(_i))[3]))) 60453642Sguido 60553642Sguido#define CALC_SUMD(s1, s2, sd) { \ 60653642Sguido (s1) = ((s1) & 0xffff) + ((s1) >> 16); \ 60753642Sguido (s2) = ((s2) & 0xffff) + ((s2) >> 16); \ 60853642Sguido /* Do it twice */ \ 60953642Sguido (s1) = ((s1) & 0xffff) + ((s1) >> 16); \ 61053642Sguido (s2) = ((s2) & 0xffff) + ((s2) >> 16); \ 61153642Sguido /* Because ~1 == -2, We really need ~1 == -1 */ \ 61253642Sguido if ((s1) > (s2)) (s2)--; \ 61353642Sguido (sd) = (s2) - (s1); \ 61453642Sguido (sd) = ((sd) & 0xffff) + ((sd) >> 16); } 61553642Sguido 61695418Sdarrenr#define NAT_SYSSPACE 0x80000000 61795418Sdarrenr#define NAT_LOCKHELD 0x40000000 61853642Sguido 619255332Scy/* 620255332Scy * This is present in ip_nat.h because it needs to be shared between 621255332Scy * ip_nat.c and ip_nat6.c 622255332Scy */ 623255332Scytypedef struct ipf_nat_softc_s { 624255332Scy ipfmutex_t ipf_nat_new; 625255332Scy ipfmutex_t ipf_nat_io; 626255332Scy int ipf_nat_doflush; 627255332Scy int ipf_nat_logging; 628255332Scy int ipf_nat_lock; 629255332Scy int ipf_nat_inited; 630255332Scy int ipf_nat_table_wm_high; 631255332Scy int ipf_nat_table_wm_low; 632255332Scy u_int ipf_nat_table_max; 633255332Scy u_int ipf_nat_table_sz; 634255332Scy u_int ipf_nat_maprules_sz; 635255332Scy u_int ipf_nat_rdrrules_sz; 636255332Scy u_int ipf_nat_hostmap_sz; 637255332Scy u_int ipf_nat_maxbucket; 638255332Scy u_int ipf_nat_last_force_flush; 639255332Scy u_int ipf_nat_defage; 640255332Scy u_int ipf_nat_defipage; 641255332Scy u_int ipf_nat_deficmpage; 642255332Scy ipf_v4_masktab_t ipf_nat_map_mask; 643255332Scy ipf_v6_masktab_t ipf_nat6_map_mask; 644255332Scy ipf_v4_masktab_t ipf_nat_rdr_mask; 645255332Scy ipf_v6_masktab_t ipf_nat6_rdr_mask; 646255332Scy nat_t **ipf_nat_table[2]; 647255332Scy nat_t *ipf_nat_instances; 648255332Scy ipnat_t *ipf_nat_list; 649255332Scy ipnat_t **ipf_nat_list_tail; 650255332Scy ipnat_t **ipf_nat_map_rules; 651255332Scy ipnat_t **ipf_nat_rdr_rules; 652255332Scy ipftq_t *ipf_nat_utqe; 653255332Scy hostmap_t **ipf_hm_maptable ; 654255332Scy hostmap_t *ipf_hm_maplist ; 655255332Scy ipftuneable_t *ipf_nat_tune; 656255332Scy ipftq_t ipf_nat_udptq; 657255332Scy ipftq_t ipf_nat_udpacktq; 658255332Scy ipftq_t ipf_nat_icmptq; 659255332Scy ipftq_t ipf_nat_icmpacktq; 660255332Scy ipftq_t ipf_nat_iptq; 661255332Scy ipftq_t ipf_nat_pending; 662255332Scy ipftq_t ipf_nat_tcptq[IPF_TCP_NSTATES]; 663255332Scy natstat_t ipf_nat_stats; 664255332Scy} ipf_nat_softc_t ; 665145522Sdarrenr 666255332Scy#define ipf_nat_map_max ipf_nat_map_mask.imt4_max 667255332Scy#define ipf_nat_rdr_max ipf_nat_rdr_mask.imt4_max 668255332Scy#define ipf_nat6_map_max ipf_nat6_map_mask.imt6_max 669255332Scy#define ipf_nat6_rdr_max ipf_nat6_rdr_mask.imt6_max 670255332Scy#define ipf_nat_map_active_masks ipf_nat_map_mask.imt4_active 671255332Scy#define ipf_nat_rdr_active_masks ipf_nat_rdr_mask.imt4_active 672255332Scy#define ipf_nat6_map_active_masks ipf_nat6_map_mask.imt6_active 673255332Scy#define ipf_nat6_rdr_active_masks ipf_nat6_rdr_mask.imt6_active 674145522Sdarrenr 675255332Scyextern frentry_t ipfnatblock; 676255332Scy 677255332Scyextern void ipf_fix_datacksum __P((u_short *, u_32_t)); 678255332Scyextern void ipf_fix_incksum __P((int, u_short *, u_32_t, u_32_t)); 679255332Scyextern void ipf_fix_outcksum __P((int, u_short *, u_32_t, u_32_t)); 680255332Scy 681255332Scyextern int ipf_nat_checkin __P((fr_info_t *, u_32_t *)); 682255332Scyextern int ipf_nat_checkout __P((fr_info_t *, u_32_t *)); 683255332Scyextern void ipf_nat_delete __P((ipf_main_softc_t *, struct nat *, int)); 684255332Scyextern void ipf_nat_deref __P((ipf_main_softc_t *, nat_t **)); 685255332Scyextern void ipf_nat_expire __P((ipf_main_softc_t *)); 686255332Scyextern int ipf_nat_hashtab_add __P((ipf_main_softc_t *, 687255332Scy ipf_nat_softc_t *, nat_t *)); 688255332Scyextern void ipf_nat_hostmapdel __P((ipf_main_softc_t *, hostmap_t **)); 689255332Scyextern int ipf_nat_hostmap_rehash __P((ipf_main_softc_t *, 690255332Scy ipftuneable_t *, ipftuneval_t *)); 691255332Scyextern nat_t *ipf_nat_icmperrorlookup __P((fr_info_t *, int)); 692255332Scyextern nat_t *ipf_nat_icmperror __P((fr_info_t *, u_int *, int)); 69392685Sdarrenr#if defined(__OpenBSD__) 694255332Scyextern void ipf_nat_ifdetach __P((void *)); 69592685Sdarrenr#endif 696255332Scyextern int ipf_nat_init __P((void)); 697255332Scyextern nat_t *ipf_nat_inlookup __P((fr_info_t *, u_int, u_int, 698255332Scy struct in_addr, struct in_addr)); 699255332Scyextern int ipf_nat_in __P((fr_info_t *, nat_t *, int, u_32_t)); 700255332Scyextern int ipf_nat_insert __P((ipf_main_softc_t *, ipf_nat_softc_t *, 701255332Scy nat_t *)); 702255332Scyextern int ipf_nat_ioctl __P((ipf_main_softc_t *, caddr_t, ioctlcmd_t, 703255332Scy int, int, void *)); 704255332Scyextern void ipf_nat_log __P((ipf_main_softc_t *, ipf_nat_softc_t *, 705255332Scy struct nat *, u_int)); 706255332Scyextern nat_t *ipf_nat_lookupredir __P((natlookup_t *)); 707255332Scyextern nat_t *ipf_nat_maplookup __P((void *, u_int, struct in_addr, 708145522Sdarrenr struct in_addr)); 709255332Scyextern nat_t *ipf_nat_add __P((fr_info_t *, ipnat_t *, nat_t **, 710255332Scy u_int, int)); 711255332Scyextern int ipf_nat_out __P((fr_info_t *, nat_t *, int, u_32_t)); 712255332Scyextern nat_t *ipf_nat_outlookup __P((fr_info_t *, u_int, u_int, 713255332Scy struct in_addr, struct in_addr)); 714255332Scyextern u_short *ipf_nat_proto __P((fr_info_t *, nat_t *, u_int)); 715255332Scyextern void ipf_nat_rule_deref __P((ipf_main_softc_t *, ipnat_t **)); 716255332Scyextern void ipf_nat_setqueue __P((ipf_main_softc_t *, ipf_nat_softc_t *, 717255332Scy nat_t *)); 718255332Scyextern void ipf_nat_setpending __P((ipf_main_softc_t *, nat_t *)); 719255332Scyextern nat_t *ipf_nat_tnlookup __P((fr_info_t *, int)); 720255332Scyextern void ipf_nat_update __P((fr_info_t *, nat_t *)); 721255332Scyextern int ipf_nat_rehash __P((ipf_main_softc_t *, ipftuneable_t *, 722255332Scy ipftuneval_t *)); 723255332Scyextern int ipf_nat_rehash_rules __P((ipf_main_softc_t *, ipftuneable_t *, 724255332Scy ipftuneval_t *)); 725255332Scyextern int ipf_nat_settimeout __P((struct ipf_main_softc_s *, 726255332Scy ipftuneable_t *, ipftuneval_t *)); 727255332Scyextern void ipf_nat_sync __P((ipf_main_softc_t *, void *)); 72853642Sguido 729255332Scyextern nat_t *ipf_nat_clone __P((fr_info_t *, nat_t *)); 730255332Scyextern void ipf_nat_delmap __P((ipf_nat_softc_t *, ipnat_t *)); 731255332Scyextern void ipf_nat_delrdr __P((ipf_nat_softc_t *, ipnat_t *)); 732255332Scyextern int ipf_nat_wildok __P((nat_t *, int, int, int, int)); 733255332Scyextern void ipf_nat_setlock __P((void *, int)); 734255332Scyextern void ipf_nat_load __P((void)); 735255332Scyextern void *ipf_nat_soft_create __P((ipf_main_softc_t *)); 736255332Scyextern int ipf_nat_soft_init __P((ipf_main_softc_t *, void *)); 737255332Scyextern void ipf_nat_soft_destroy __P((ipf_main_softc_t *, void *)); 738255332Scyextern int ipf_nat_soft_fini __P((ipf_main_softc_t *, void *)); 739255332Scyextern int ipf_nat_main_load __P((void)); 740255332Scyextern int ipf_nat_main_unload __P((void)); 741255332Scyextern ipftq_t *ipf_nat_add_tq __P((ipf_main_softc_t *, int)); 742255332Scyextern void ipf_nat_uncreate __P((fr_info_t *)); 74353642Sguido 744255332Scy#ifdef USE_INET6 745255332Scyextern nat_t *ipf_nat6_add __P((fr_info_t *, ipnat_t *, nat_t **, 746255332Scy u_int, int)); 747255332Scyextern void ipf_nat6_addrdr __P((ipf_nat_softc_t *, ipnat_t *)); 748255332Scyextern void ipf_nat6_addmap __P((ipf_nat_softc_t *, ipnat_t *)); 749255332Scyextern void ipf_nat6_addencap __P((ipf_nat_softc_t *, ipnat_t *)); 750255332Scyextern int ipf_nat6_checkout __P((fr_info_t *, u_32_t *)); 751255332Scyextern int ipf_nat6_checkin __P((fr_info_t *, u_32_t *)); 752255332Scyextern void ipf_nat6_delmap __P((ipf_nat_softc_t *, ipnat_t *)); 753255332Scyextern void ipf_nat6_delrdr __P((ipf_nat_softc_t *, ipnat_t *)); 754255332Scyextern int ipf_nat6_finalise __P((fr_info_t *, nat_t *)); 755255332Scyextern nat_t *ipf_nat6_icmperror __P((fr_info_t *, u_int *, int)); 756255332Scyextern nat_t *ipf_nat6_icmperrorlookup __P((fr_info_t *, int)); 757255332Scyextern nat_t *ipf_nat6_inlookup __P((fr_info_t *, u_int, u_int, 758255332Scy struct in6_addr *, struct in6_addr *)); 759255332Scyextern u_32_t ipf_nat6_ip6subtract __P((i6addr_t *, i6addr_t *)); 760255332Scyextern frentry_t *ipf_nat6_ipfin __P((fr_info_t *, u_32_t *)); 761255332Scyextern frentry_t *ipf_nat6_ipfout __P((fr_info_t *, u_32_t *)); 762255332Scyextern nat_t *ipf_nat6_lookupredir __P((natlookup_t *)); 763255332Scyextern int ipf_nat6_newmap __P((fr_info_t *, nat_t *, natinfo_t *)); 764255332Scyextern int ipf_nat6_newrdr __P((fr_info_t *, nat_t *, natinfo_t *)); 765255332Scyextern nat_t *ipf_nat6_outlookup __P((fr_info_t *, u_int, u_int, 766255332Scy struct in6_addr *, struct in6_addr *)); 767255332Scyextern int ipf_nat6_newrewrite __P((fr_info_t *, nat_t *, natinfo_t *)); 768255332Scyextern int ipf_nat6_newdivert __P((fr_info_t *, nat_t *, natinfo_t *)); 769255332Scyextern int ipf_nat6_ruleaddrinit __P((ipf_main_softc_t *, ipf_nat_softc_t *, ipnat_t *)); 770255332Scy 771255332Scy#endif 772255332Scy 773255332Scy 77453642Sguido#endif /* __IP_NAT_H__ */ 775