ip_nat.h revision 369186
1/* $FreeBSD: stable/11/sys/contrib/ipfilter/netinet/ip_nat.h 369186 2021-01-31 04:32:46Z cy $ */ 2 3/* 4 * Copyright (C) 2012 by Darren Reed. 5 * 6 * See the IPFILTER.LICENCE file for details on licencing. 7 * 8 * @(#)ip_nat.h 1.5 2/4/96 9 * $FreeBSD: stable/11/sys/contrib/ipfilter/netinet/ip_nat.h 369186 2021-01-31 04:32:46Z cy $ 10 * Id: ip_nat.h,v 2.90.2.20 2007/09/25 08:27:32 darrenr Exp $ 11 */ 12 13#ifndef __IP_NAT_H__ 14#define __IP_NAT_H__ 15 16#ifndef SOLARIS 17# if defined(sun) && defined(__SVR4) 18# define SOLARIS 1 19# else 20# define SOLARIS 0 21# endif 22#endif 23 24#define SIOCADNAT _IOW('r', 60, struct ipfobj) 25#define SIOCRMNAT _IOW('r', 61, struct ipfobj) 26#define SIOCGNATS _IOWR('r', 62, struct ipfobj) 27#define SIOCGNATL _IOWR('r', 63, struct ipfobj) 28#define SIOCPURGENAT _IOWR('r', 100, struct ipfobj) 29 30#undef LARGE_NAT /* define this if you're setting up a system to NAT 31 * LARGE numbers of networks/hosts - i.e. in the 32 * hundreds or thousands. In such a case, you should 33 * also change the RDR_SIZE and NAT_SIZE below to more 34 * appropriate sizes. The figures below were used for 35 * a setup with 1000-2000 networks to NAT. 36 */ 37#ifndef NAT_SIZE 38# ifdef LARGE_NAT 39# define NAT_SIZE 2047 40# else 41# define NAT_SIZE 127 42# endif 43#endif 44#ifndef RDR_SIZE 45# ifdef LARGE_NAT 46# define RDR_SIZE 2047 47# else 48# define RDR_SIZE 127 49# endif 50#endif 51#ifndef HOSTMAP_SIZE 52# ifdef LARGE_NAT 53# define HOSTMAP_SIZE 8191 54# else 55# define HOSTMAP_SIZE 2047 56# endif 57#endif 58#ifndef NAT_TABLE_MAX 59/* 60 * This is newly introduced and for the sake of "least surprise", the numbers 61 * present aren't what we'd normally use for creating a proper hash table. 62 */ 63# ifdef LARGE_NAT 64# define NAT_TABLE_MAX 180000 65# else 66# define NAT_TABLE_MAX 30000 67# endif 68#endif 69#ifndef NAT_TABLE_SZ 70# ifdef LARGE_NAT 71# define NAT_TABLE_SZ 16383 72# else 73# define NAT_TABLE_SZ 2047 74# endif 75#endif 76#ifndef APR_LABELLEN 77#define APR_LABELLEN 16 78#endif 79#define NAT_HW_CKSUM 0x80000000 80#define NAT_HW_CKSUM_PART 0x40000000 81 82#define DEF_NAT_AGE 1200 /* 10 minutes (600 seconds) */ 83 84struct ipstate; 85struct ap_session; 86 87/* 88 * This structure is used in the active NAT table and represents an 89 * active NAT session. 90 */ 91typedef struct nat { 92 ipfmutex_t nat_lock; 93 struct nat *nat_next; 94 struct nat **nat_pnext; 95 struct nat *nat_hnext[2]; 96 struct nat **nat_phnext[2]; 97 struct hostmap *nat_hm; 98 void *nat_data; 99 struct nat **nat_me; 100 struct ipstate *nat_state; 101 struct ap_session *nat_aps; /* proxy session */ 102 frentry_t *nat_fr; /* filter rule ptr if appropriate */ 103 struct ipnat *nat_ptr; /* pointer back to the rule */ 104 void *nat_ifps[2]; 105 void *nat_sync; 106 ipftqent_t nat_tqe; 107 int nat_mtu[2]; 108 u_32_t nat_flags; 109 u_32_t nat_sumd[2]; /* ip checksum delta for data segment*/ 110 u_32_t nat_ipsumd; /* ip checksum delta for ip header */ 111 u_32_t nat_mssclamp; /* if != zero clamp MSS to this */ 112 i6addr_t nat_odst6; 113 i6addr_t nat_osrc6; 114 i6addr_t nat_ndst6; 115 i6addr_t nat_nsrc6; 116 U_QUAD_T nat_pkts[2]; 117 U_QUAD_T nat_bytes[2]; 118 union { 119 udpinfo_t nat_unu; 120 tcpinfo_t nat_unt; 121 icmpinfo_t nat_uni; 122 greinfo_t nat_ugre; 123 } nat_unold, nat_unnew; 124 int nat_use; 125 int nat_pr[2]; /* protocol for NAT */ 126 int nat_dir; 127 int nat_ref; /* reference count */ 128 u_int nat_hv[2]; 129 char nat_ifnames[2][LIFNAMSIZ]; 130 int nat_rev; /* 0 = forward, 1 = reverse */ 131 int nat_dlocal; 132 int nat_v[2]; /* 0 = old, 1 = new */ 133 u_int nat_redir; /* copy of in_redir */ 134} nat_t; 135 136#define nat_osrcip nat_osrc6.in4 137#define nat_odstip nat_odst6.in4 138#define nat_nsrcip nat_nsrc6.in4 139#define nat_ndstip nat_ndst6.in4 140#define nat_osrcaddr nat_osrc6.in4.s_addr 141#define nat_odstaddr nat_odst6.in4.s_addr 142#define nat_nsrcaddr nat_nsrc6.in4.s_addr 143#define nat_ndstaddr nat_ndst6.in4.s_addr 144#define nat_age nat_tqe.tqe_die 145#define nat_osport nat_unold.nat_unt.ts_sport 146#define nat_odport nat_unold.nat_unt.ts_dport 147#define nat_nsport nat_unnew.nat_unt.ts_sport 148#define nat_ndport nat_unnew.nat_unt.ts_dport 149#define nat_oicmpid nat_unold.nat_uni.ici_id 150#define nat_nicmpid nat_unnew.nat_uni.ici_id 151#define nat_type nat_unold.nat_uni.ici_type 152#define nat_oseq nat_unold.nat_uni.ici_seq 153#define nat_nseq nat_unnew.nat_uni.ici_seq 154#define nat_tcpstate nat_tqe.tqe_state 155#define nat_die nat_tqe.tqe_die 156#define nat_touched nat_tqe.tqe_touched 157 158/* 159 * Values for nat_dir 160 */ 161#define NAT_INBOUND 0 162#define NAT_OUTBOUND 1 163#define NAT_ENCAPIN 2 164#define NAT_ENCAPOUT 3 165#define NAT_DIVERTIN 4 166#define NAT_DIVERTOUT 5 167 168/* 169 * Definitions for nat_flags 170 */ 171#define NAT_TCP 0x0001 /* IPN_TCP */ 172#define NAT_UDP 0x0002 /* IPN_UDP */ 173#define NAT_ICMPERR 0x0004 /* IPN_ICMPERR */ 174#define NAT_ICMPQUERY 0x0008 /* IPN_ICMPQUERY */ 175#define NAT_SEARCH 0x0010 176#define NAT_SLAVE 0x0020 /* Slave connection for a proxy */ 177#define NAT_NOTRULEPORT 0x0040 /* Don't use the port # in the NAT rule */ 178 179#define NAT_TCPUDP (NAT_TCP|NAT_UDP) 180#define NAT_TCPUDPICMP (NAT_TCP|NAT_UDP|NAT_ICMPERR) 181#define NAT_TCPUDPICMPQ (NAT_TCP|NAT_UDP|NAT_ICMPQUERY) 182#define NAT_FROMRULE (NAT_TCP|NAT_UDP) 183 184/* 0x0100 reserved for FI_W_SPORT */ 185/* 0x0200 reserved for FI_W_DPORT */ 186/* 0x0400 reserved for FI_W_SADDR */ 187/* 0x0800 reserved for FI_W_DADDR */ 188/* 0x1000 reserved for FI_W_NEWFR */ 189/* 0x2000 reserved for SI_CLONE */ 190/* 0x4000 reserved for SI_CLONED */ 191/* 0x8000 reserved for SI_IGNOREPKT */ 192 193#define NAT_DEBUG 0x800000 194 195typedef struct nat_addr_s { 196 i6addr_t na_addr[2]; 197 i6addr_t na_nextaddr; 198 int na_atype; 199 int na_function; 200} nat_addr_t; 201 202#define na_nextip na_nextaddr.in4.s_addr 203#define na_nextip6 na_nextaddr.in6 204#define na_num na_addr[0].iplookupnum 205#define na_type na_addr[0].iplookuptype 206#define na_subtype na_addr[0].iplookupsubtype 207#define na_ptr na_addr[1].iplookupptr 208#define na_func na_addr[1].iplookupfunc 209 210 211/* 212 * This structure represents an actual NAT rule, loaded by ipnat. 213 */ 214typedef struct ipnat { 215 ipfmutex_t in_lock; 216 struct ipnat *in_next; /* NAT rule list next */ 217 struct ipnat **in_pnext; /* prior rdr next ptr */ 218 struct ipnat *in_rnext; /* rdr rule hash next */ 219 struct ipnat **in_prnext; /* prior rdr next ptr */ 220 struct ipnat *in_mnext; /* map rule hash next */ 221 struct ipnat **in_pmnext; /* prior map next ptr */ 222 struct ipftq *in_tqehead[2]; 223 void *in_ifps[2]; 224 void *in_apr; 225 char *in_comment; 226 mb_t *in_divmp; 227 void *in_pconf; 228 U_QUAD_T in_pkts[2]; 229 U_QUAD_T in_bytes[2]; 230 u_long in_space; 231 u_long in_hits; 232 int in_size; 233 int in_use; 234 u_int in_hv[2]; 235 int in_flineno; /* conf. file line number */ 236 int in_stepnext; 237 int in_dlocal; 238 u_short in_dpnext; 239 u_short in_spnext; 240 /* From here to the end is covered by IPN_CMPSIZ */ 241 u_char in_v[2]; /* 0 = old, 1 = new */ 242 u_32_t in_flags; 243 u_32_t in_mssclamp; /* if != 0 clamp MSS to this */ 244 u_int in_age[2]; 245 int in_redir; /* see below for values */ 246 int in_pr[2]; /* protocol. */ 247 nat_addr_t in_ndst; 248 nat_addr_t in_nsrc; 249 nat_addr_t in_osrc; 250 nat_addr_t in_odst; 251 frtuc_t in_tuc; 252 u_short in_ppip; /* ports per IP. */ 253 u_short in_ippip; /* IP #'s per IP# */ 254 u_short in_ndports[2]; 255 u_short in_nsports[2]; 256 int in_ifnames[2]; 257 int in_plabel; /* proxy label. */ 258 int in_pconfig; /* proxy label. */ 259 ipftag_t in_tag; 260 int in_namelen; 261 char in_names[1]; 262} ipnat_t; 263 264/* 265 * MAP-IN MAP-OUT RDR-IN RDR-OUT 266 * osrc X == src == src X 267 * odst X == dst == dst X 268 * nsrc == dst X X == dst 269 * ndst == src X X == src 270 */ 271#define in_dpmin in_ndports[0] /* Also holds static redir port */ 272#define in_dpmax in_ndports[1] 273#define in_spmin in_nsports[0] /* Also holds static redir port */ 274#define in_spmax in_nsports[1] 275#define in_ndport in_ndports[0] 276#define in_nsport in_nsports[0] 277#define in_dipnext in_ndst.na_nextaddr.in4 278#define in_dipnext6 in_ndst.na_nextaddr 279#define in_dnip in_ndst.na_nextaddr.in4.s_addr 280#define in_dnip6 in_ndst.na_nextaddr 281#define in_sipnext in_nsrc.na_nextaddr.in4 282#define in_snip in_nsrc.na_nextaddr.in4.s_addr 283#define in_snip6 in_nsrc.na_nextaddr 284#define in_odstip in_odst.na_addr[0].in4 285#define in_odstip6 in_odst.na_addr[0] 286#define in_odstaddr in_odst.na_addr[0].in4.s_addr 287#define in_odstmsk in_odst.na_addr[1].in4.s_addr 288#define in_odstmsk6 in_odst.na_addr[1] 289#define in_odstatype in_odst.na_atype 290#define in_osrcip in_osrc.na_addr[0].in4 291#define in_osrcip6 in_osrc.na_addr[0] 292#define in_osrcaddr in_osrc.na_addr[0].in4.s_addr 293#define in_osrcmsk in_osrc.na_addr[1].in4.s_addr 294#define in_osrcmsk6 in_osrc.na_addr[1] 295#define in_osrcatype in_osrc.na_atype 296#define in_ndstip in_ndst.na_addr[0].in4 297#define in_ndstip6 in_ndst.na_addr[0] 298#define in_ndstaddr in_ndst.na_addr[0].in4.s_addr 299#define in_ndstmsk in_ndst.na_addr[1].in4.s_addr 300#define in_ndstmsk6 in_ndst.na_addr[1] 301#define in_ndstatype in_ndst.na_atype 302#define in_ndstafunc in_ndst.na_function 303#define in_nsrcip in_nsrc.na_addr[0].in4 304#define in_nsrcip6 in_nsrc.na_addr[0] 305#define in_nsrcaddr in_nsrc.na_addr[0].in4.s_addr 306#define in_nsrcmsk in_nsrc.na_addr[1].in4.s_addr 307#define in_nsrcmsk6 in_nsrc.na_addr[1] 308#define in_nsrcatype in_nsrc.na_atype 309#define in_nsrcafunc in_nsrc.na_function 310#define in_scmp in_tuc.ftu_scmp 311#define in_dcmp in_tuc.ftu_dcmp 312#define in_stop in_tuc.ftu_stop 313#define in_dtop in_tuc.ftu_dtop 314#define in_osport in_tuc.ftu_sport 315#define in_odport in_tuc.ftu_dport 316#define in_ndstnum in_ndst.na_addr[0].iplookupnum 317#define in_ndsttype in_ndst.na_addr[0].iplookuptype 318#define in_ndstptr in_ndst.na_addr[1].iplookupptr 319#define in_ndstfunc in_ndst.na_addr[1].iplookupfunc 320#define in_nsrcnum in_nsrc.na_addr[0].iplookupnum 321#define in_nsrctype in_nsrc.na_addr[0].iplookuptype 322#define in_nsrcptr in_nsrc.na_addr[1].iplookupptr 323#define in_nsrcfunc in_nsrc.na_addr[1].iplookupfunc 324#define in_odstnum in_odst.na_addr[0].iplookupnum 325#define in_odsttype in_odst.na_addr[0].iplookuptype 326#define in_odstptr in_odst.na_addr[1].iplookupptr 327#define in_odstfunc in_odst.na_addr[1].iplookupfunc 328#define in_osrcnum in_osrc.na_addr[0].iplookupnum 329#define in_osrctype in_osrc.na_addr[0].iplookuptype 330#define in_osrcptr in_osrc.na_addr[1].iplookupptr 331#define in_osrcfunc in_osrc.na_addr[1].iplookupfunc 332#define in_icmpidmin in_nsports[0] 333#define in_icmpidmax in_nsports[1] 334 335/* 336 * Bit definitions for in_flags 337 */ 338#define IPN_ANY 0x00000 339#define IPN_TCP 0x00001 340#define IPN_UDP 0x00002 341#define IPN_TCPUDP (IPN_TCP|IPN_UDP) 342#define IPN_ICMPERR 0x00004 343#define IPN_TCPUDPICMP (IPN_TCP|IPN_UDP|IPN_ICMPERR) 344#define IPN_ICMPQUERY 0x00008 345#define IPN_TCPUDPICMPQ (IPN_TCP|IPN_UDP|IPN_ICMPQUERY) 346#define IPN_RF (IPN_TCPUDP|IPN_DELETE|IPN_ICMPERR) 347#define IPN_AUTOPORTMAP 0x00010 348#define IPN_FILTER 0x00020 349#define IPN_SPLIT 0x00040 350#define IPN_ROUNDR 0x00080 351#define IPN_SIPRANGE 0x00100 352#define IPN_DIPRANGE 0x00200 353#define IPN_NOTSRC 0x00400 354#define IPN_NOTDST 0x00800 355#define IPN_NO 0x01000 356#define IPN_DYNSRCIP 0x02000 /* dynamic src IP# */ 357#define IPN_DYNDSTIP 0x04000 /* dynamic dst IP# */ 358#define IPN_DELETE 0x08000 359#define IPN_STICKY 0x10000 360#define IPN_FRAG 0x20000 361#define IPN_FIXEDSPORT 0x40000 362#define IPN_FIXEDDPORT 0x80000 363#define IPN_FINDFORWARD 0x100000 364#define IPN_IN 0x200000 365#define IPN_SEQUENTIAL 0x400000 366#define IPN_PURGE 0x800000 367#define IPN_PROXYRULE 0x1000000 368#define IPN_USERFLAGS (IPN_TCPUDP|IPN_AUTOPORTMAP|IPN_SIPRANGE|IPN_SPLIT|\ 369 IPN_ROUNDR|IPN_FILTER|IPN_NOTSRC|IPN_NOTDST|IPN_NO|\ 370 IPN_FRAG|IPN_STICKY|IPN_FIXEDDPORT|IPN_ICMPQUERY|\ 371 IPN_DIPRANGE|IPN_SEQUENTIAL|IPN_PURGE) 372 373/* 374 * Values for in_redir 375 */ 376#define NAT_MAP 0x01 377#define NAT_REDIRECT 0x02 378#define NAT_BIMAP (NAT_MAP|NAT_REDIRECT) 379#define NAT_MAPBLK 0x04 380#define NAT_REWRITE 0x08 381#define NAT_ENCAP 0x10 382#define NAT_DIVERTUDP 0x20 383 384#define MAPBLK_MINPORT 1024 /* don't use reserved ports for src port */ 385#define USABLE_PORTS (65536 - MAPBLK_MINPORT) 386 387#define IPN_CMPSIZ (sizeof(ipnat_t) - offsetof(ipnat_t, in_v)) 388 389typedef struct natlookup { 390 i6addr_t nl_inipaddr; 391 i6addr_t nl_outipaddr; 392 i6addr_t nl_realipaddr; 393 int nl_v; 394 int nl_flags; 395 u_short nl_inport; 396 u_short nl_outport; 397 u_short nl_realport; 398} natlookup_t; 399 400#define nl_inip nl_inipaddr.in4 401#define nl_outip nl_outipaddr.in4 402#define nl_realip nl_realipaddr.in4 403#define nl_inip6 nl_inipaddr.in6 404#define nl_outip6 nl_outipaddr.in6 405#define nl_realip6 nl_realipaddr.in6 406 407 408typedef struct nat_save { 409 void *ipn_next; 410 struct nat ipn_nat; 411 struct ipnat ipn_ipnat; 412 struct frentry ipn_fr; 413 int ipn_dsize; 414 char ipn_data[4]; 415} nat_save_t; 416 417#define ipn_rule ipn_nat.nat_fr 418 419typedef struct natget { 420 void *ng_ptr; 421 int ng_sz; 422} natget_t; 423 424 425/* 426 * This structure gets used to help NAT sessions keep the same NAT rule (and 427 * thus translation for IP address) when: 428 * (a) round-robin redirects are in use 429 * (b) different IP add 430 */ 431typedef struct hostmap { 432 struct hostmap *hm_hnext; 433 struct hostmap **hm_phnext; 434 struct hostmap *hm_next; 435 struct hostmap **hm_pnext; 436 struct ipnat *hm_ipnat; 437 i6addr_t hm_osrcip6; 438 i6addr_t hm_odstip6; 439 i6addr_t hm_nsrcip6; 440 i6addr_t hm_ndstip6; 441 u_32_t hm_port; 442 int hm_ref; 443 int hm_hv; 444 int hm_v; 445} hostmap_t; 446 447#define hm_osrcip hm_osrcip6.in4 448#define hm_odstip hm_odstip6.in4 449#define hm_nsrcip hm_nsrcip6.in4 450#define hm_ndstip hm_ndstip6.in4 451#define hm_osrc6 hm_osrcip6.in6 452#define hm_odst6 hm_odstip6.in6 453#define hm_nsrc6 hm_nsrcip6.in6 454#define hm_ndst6 hm_ndstip6.in6 455 456 457/* 458 * Structure used to pass information in to nat_newmap and nat_newrdr. 459 */ 460typedef struct natinfo { 461 ipnat_t *nai_np; 462 u_32_t nai_sum1; 463 u_32_t nai_sum2; 464 struct in_addr nai_ip; /* In host byte order */ 465 u_short nai_port; 466 u_short nai_nport; 467 u_short nai_sport; 468 u_short nai_dport; 469} natinfo_t; 470 471 472typedef struct nat_stat_side { 473 u_int *ns_bucketlen; 474 nat_t **ns_table; 475 u_long ns_added; 476 u_long ns_appr_fail; 477 u_long ns_badnat; 478 u_long ns_badnatnew; 479 u_long ns_badnextaddr; 480 u_long ns_bucket_max; 481 u_long ns_clone_nomem; 482 u_long ns_decap_bad; 483 u_long ns_decap_fail; 484 u_long ns_decap_pullup; 485 u_long ns_divert_dup; 486 u_long ns_divert_exist; 487 u_long ns_drop; 488 u_long ns_encap_dup; 489 u_long ns_encap_pullup; 490 u_long ns_exhausted; 491 u_long ns_icmp_address; 492 u_long ns_icmp_basic; 493 u_long ns_icmp_mbuf; 494 u_long ns_icmp_notfound; 495 u_long ns_icmp_rebuild; 496 u_long ns_icmp_short; 497 u_long ns_icmp_size; 498 u_long ns_ifpaddrfail; 499 u_long ns_ignored; 500 u_long ns_insert_fail; 501 u_long ns_inuse; 502 u_long ns_log; 503 u_long ns_lookup_miss; 504 u_long ns_lookup_nowild; 505 u_long ns_new_ifpaddr; 506 u_long ns_memfail; 507 u_long ns_table_max; 508 u_long ns_translated; 509 u_long ns_unfinalised; 510 u_long ns_wrap; 511 u_long ns_xlate_null; 512 u_long ns_xlate_exists; 513 u_long ns_ipf_proxy_fail; 514 u_long ns_uncreate[2]; 515} nat_stat_side_t; 516 517 518typedef struct natstat { 519 nat_t *ns_instances; 520 ipnat_t *ns_list; 521 hostmap_t *ns_maplist; 522 hostmap_t **ns_maptable; 523 u_int ns_active; 524 u_long ns_addtrpnt; 525 u_long ns_divert_build; 526 u_long ns_expire; 527 u_long ns_flush_all; 528 u_long ns_flush_closing; 529 u_long ns_flush_queue; 530 u_long ns_flush_state; 531 u_long ns_flush_timeout; 532 u_long ns_hm_new; 533 u_long ns_hm_newfail; 534 u_long ns_hm_addref; 535 u_long ns_hm_nullnp; 536 u_long ns_log_ok; 537 u_long ns_log_fail; 538 u_int ns_hostmap_sz; 539 u_int ns_nattab_sz; 540 u_int ns_nattab_max; 541 u_int ns_orphans; 542 u_int ns_rules; 543 u_int ns_rules_map; 544 u_int ns_rules_rdr; 545 u_int ns_rultab_sz; 546 u_int ns_rdrtab_sz; 547 u_32_t ns_ticks; 548 u_int ns_trpntab_sz; 549 u_int ns_wilds; 550 u_long ns_proto[256]; 551 nat_stat_side_t ns_side[2]; 552#ifdef USE_INET6 553 nat_stat_side_t ns_side6[2]; 554#endif 555} natstat_t; 556 557typedef struct natlog { 558 i6addr_t nl_osrcip; 559 i6addr_t nl_odstip; 560 i6addr_t nl_nsrcip; 561 i6addr_t nl_ndstip; 562 u_short nl_osrcport; 563 u_short nl_odstport; 564 u_short nl_nsrcport; 565 u_short nl_ndstport; 566 int nl_action; 567 int nl_type; 568 int nl_rule; 569 U_QUAD_T nl_pkts[2]; 570 U_QUAD_T nl_bytes[2]; 571 u_char nl_p[2]; 572 u_char nl_v[2]; 573 u_char nl_ifnames[2][LIFNAMSIZ]; 574} natlog_t; 575 576 577#define NL_NEW 0 578#define NL_CLONE 1 579#define NL_PURGE 0xfffc 580#define NL_DESTROY 0xfffd 581#define NL_FLUSH 0xfffe 582#define NL_EXPIRE 0xffff 583 584#define NAT_HASH_FN(_k,_l,_m) (((_k) + ((_k) >> 12) + _l) % (_m)) 585#define NAT_HASH_FN6(_k,_l,_m) ((((u_32_t *)(_k))[3] \ 586 + (((u_32_t *)(_k))[3] >> 12) \ 587 + (((u_32_t *)(_k))[2]) \ 588 + (((u_32_t *)(_k))[2] >> 12) \ 589 + (((u_32_t *)(_k))[1]) \ 590 + (((u_32_t *)(_k))[1] >> 12) \ 591 + (((u_32_t *)(_k))[0]) \ 592 + (((u_32_t *)(_k))[0] >> 12) \ 593 + _l) % (_m)) 594 595#define LONG_SUM(_i) (((_i) & 0xffff) + ((_i) >> 16)) 596#define LONG_SUM6(_i) (LONG_SUM(ntohl(((u_32_t *)(_i))[0])) + \ 597 LONG_SUM(ntohl(((u_32_t *)(_i))[1])) + \ 598 LONG_SUM(ntohl(((u_32_t *)(_i))[2])) + \ 599 LONG_SUM(ntohl(((u_32_t *)(_i))[3]))) 600 601#define CALC_SUMD(s1, s2, sd) { \ 602 (s1) = ((s1) & 0xffff) + ((s1) >> 16); \ 603 (s2) = ((s2) & 0xffff) + ((s2) >> 16); \ 604 /* Do it twice */ \ 605 (s1) = ((s1) & 0xffff) + ((s1) >> 16); \ 606 (s2) = ((s2) & 0xffff) + ((s2) >> 16); \ 607 /* Because ~1 == -2, We really need ~1 == -1 */ \ 608 if ((s1) > (s2)) (s2)--; \ 609 (sd) = (s2) - (s1); \ 610 (sd) = ((sd) & 0xffff) + ((sd) >> 16); } 611 612#define NAT_SYSSPACE 0x80000000 613#define NAT_LOCKHELD 0x40000000 614 615/* 616 * This is present in ip_nat.h because it needs to be shared between 617 * ip_nat.c and ip_nat6.c 618 */ 619typedef struct ipf_nat_softc_s { 620 ipfmutex_t ipf_nat_new; 621 ipfmutex_t ipf_nat_io; 622 int ipf_nat_doflush; 623 int ipf_nat_logging; 624 int ipf_nat_lock; 625 int ipf_nat_inited; 626 int ipf_nat_table_wm_high; 627 int ipf_nat_table_wm_low; 628 u_int ipf_nat_table_max; 629 u_int ipf_nat_table_sz; 630 u_int ipf_nat_maprules_sz; 631 u_int ipf_nat_rdrrules_sz; 632 u_int ipf_nat_hostmap_sz; 633 u_int ipf_nat_maxbucket; 634 u_int ipf_nat_last_force_flush; 635 u_int ipf_nat_defage; 636 u_int ipf_nat_defipage; 637 u_int ipf_nat_deficmpage; 638 ipf_v4_masktab_t ipf_nat_map_mask; 639 ipf_v6_masktab_t ipf_nat6_map_mask; 640 ipf_v4_masktab_t ipf_nat_rdr_mask; 641 ipf_v6_masktab_t ipf_nat6_rdr_mask; 642 nat_t **ipf_nat_table[2]; 643 nat_t *ipf_nat_instances; 644 ipnat_t *ipf_nat_list; 645 ipnat_t **ipf_nat_list_tail; 646 ipnat_t **ipf_nat_map_rules; 647 ipnat_t **ipf_nat_rdr_rules; 648 ipftq_t *ipf_nat_utqe; 649 hostmap_t **ipf_hm_maptable ; 650 hostmap_t *ipf_hm_maplist ; 651 ipftuneable_t *ipf_nat_tune; 652 ipftq_t ipf_nat_udptq; 653 ipftq_t ipf_nat_udpacktq; 654 ipftq_t ipf_nat_icmptq; 655 ipftq_t ipf_nat_icmpacktq; 656 ipftq_t ipf_nat_iptq; 657 ipftq_t ipf_nat_pending; 658 ipftq_t ipf_nat_tcptq[IPF_TCP_NSTATES]; 659 natstat_t ipf_nat_stats; 660} ipf_nat_softc_t ; 661 662#define ipf_nat_map_max ipf_nat_map_mask.imt4_max 663#define ipf_nat_rdr_max ipf_nat_rdr_mask.imt4_max 664#define ipf_nat6_map_max ipf_nat6_map_mask.imt6_max 665#define ipf_nat6_rdr_max ipf_nat6_rdr_mask.imt6_max 666#define ipf_nat_map_active_masks ipf_nat_map_mask.imt4_active 667#define ipf_nat_rdr_active_masks ipf_nat_rdr_mask.imt4_active 668#define ipf_nat6_map_active_masks ipf_nat6_map_mask.imt6_active 669#define ipf_nat6_rdr_active_masks ipf_nat6_rdr_mask.imt6_active 670 671extern frentry_t ipfnatblock; 672 673extern void ipf_fix_datacksum __P((u_short *, u_32_t)); 674extern void ipf_fix_incksum __P((int, u_short *, u_32_t, u_32_t)); 675extern void ipf_fix_outcksum __P((int, u_short *, u_32_t, u_32_t)); 676 677extern int ipf_nat_checkin __P((fr_info_t *, u_32_t *)); 678extern int ipf_nat_checkout __P((fr_info_t *, u_32_t *)); 679extern void ipf_nat_delete __P((ipf_main_softc_t *, struct nat *, int)); 680extern void ipf_nat_deref __P((ipf_main_softc_t *, nat_t **)); 681extern void ipf_nat_expire __P((ipf_main_softc_t *)); 682extern int ipf_nat_hashtab_add __P((ipf_main_softc_t *, 683 ipf_nat_softc_t *, nat_t *)); 684extern void ipf_nat_hostmapdel __P((ipf_main_softc_t *, hostmap_t **)); 685extern int ipf_nat_hostmap_rehash __P((ipf_main_softc_t *, 686 ipftuneable_t *, ipftuneval_t *)); 687extern nat_t *ipf_nat_icmperrorlookup __P((fr_info_t *, int)); 688extern nat_t *ipf_nat_icmperror __P((fr_info_t *, u_int *, int)); 689extern int ipf_nat_init __P((void)); 690extern nat_t *ipf_nat_inlookup __P((fr_info_t *, u_int, u_int, 691 struct in_addr, struct in_addr)); 692extern int ipf_nat_in __P((fr_info_t *, nat_t *, int, u_32_t)); 693extern int ipf_nat_insert __P((ipf_main_softc_t *, ipf_nat_softc_t *, 694 nat_t *)); 695extern int ipf_nat_ioctl __P((ipf_main_softc_t *, caddr_t, ioctlcmd_t, 696 int, int, void *)); 697extern void ipf_nat_log __P((ipf_main_softc_t *, ipf_nat_softc_t *, 698 struct nat *, u_int)); 699extern nat_t *ipf_nat_lookupredir __P((natlookup_t *)); 700extern nat_t *ipf_nat_maplookup __P((void *, u_int, struct in_addr, 701 struct in_addr)); 702extern nat_t *ipf_nat_add __P((fr_info_t *, ipnat_t *, nat_t **, 703 u_int, int)); 704extern int ipf_nat_out __P((fr_info_t *, nat_t *, int, u_32_t)); 705extern nat_t *ipf_nat_outlookup __P((fr_info_t *, u_int, u_int, 706 struct in_addr, struct in_addr)); 707extern u_short *ipf_nat_proto __P((fr_info_t *, nat_t *, u_int)); 708extern void ipf_nat_rule_deref __P((ipf_main_softc_t *, ipnat_t **)); 709extern void ipf_nat_setqueue __P((ipf_main_softc_t *, ipf_nat_softc_t *, 710 nat_t *)); 711extern void ipf_nat_setpending __P((ipf_main_softc_t *, nat_t *)); 712extern nat_t *ipf_nat_tnlookup __P((fr_info_t *, int)); 713extern void ipf_nat_update __P((fr_info_t *, nat_t *)); 714extern int ipf_nat_rehash __P((ipf_main_softc_t *, ipftuneable_t *, 715 ipftuneval_t *)); 716extern int ipf_nat_rehash_rules __P((ipf_main_softc_t *, ipftuneable_t *, 717 ipftuneval_t *)); 718extern int ipf_nat_settimeout __P((struct ipf_main_softc_s *, 719 ipftuneable_t *, ipftuneval_t *)); 720extern void ipf_nat_sync __P((ipf_main_softc_t *, void *)); 721 722extern nat_t *ipf_nat_clone __P((fr_info_t *, nat_t *)); 723extern void ipf_nat_delmap __P((ipf_nat_softc_t *, ipnat_t *)); 724extern void ipf_nat_delrdr __P((ipf_nat_softc_t *, ipnat_t *)); 725extern int ipf_nat_wildok __P((nat_t *, int, int, int, int)); 726extern void ipf_nat_setlock __P((void *, int)); 727extern void ipf_nat_load __P((void)); 728extern void *ipf_nat_soft_create __P((ipf_main_softc_t *)); 729extern int ipf_nat_soft_init __P((ipf_main_softc_t *, void *)); 730extern void ipf_nat_soft_destroy __P((ipf_main_softc_t *, void *)); 731extern int ipf_nat_soft_fini __P((ipf_main_softc_t *, void *)); 732extern int ipf_nat_main_load __P((void)); 733extern int ipf_nat_main_unload __P((void)); 734extern ipftq_t *ipf_nat_add_tq __P((ipf_main_softc_t *, int)); 735extern void ipf_nat_uncreate __P((fr_info_t *)); 736 737#ifdef USE_INET6 738extern nat_t *ipf_nat6_add __P((fr_info_t *, ipnat_t *, nat_t **, 739 u_int, int)); 740extern void ipf_nat6_addrdr __P((ipf_nat_softc_t *, ipnat_t *)); 741extern void ipf_nat6_addmap __P((ipf_nat_softc_t *, ipnat_t *)); 742extern void ipf_nat6_addencap __P((ipf_nat_softc_t *, ipnat_t *)); 743extern int ipf_nat6_checkout __P((fr_info_t *, u_32_t *)); 744extern int ipf_nat6_checkin __P((fr_info_t *, u_32_t *)); 745extern void ipf_nat6_delmap __P((ipf_nat_softc_t *, ipnat_t *)); 746extern void ipf_nat6_delrdr __P((ipf_nat_softc_t *, ipnat_t *)); 747extern int ipf_nat6_finalise __P((fr_info_t *, nat_t *)); 748extern nat_t *ipf_nat6_icmperror __P((fr_info_t *, u_int *, int)); 749extern nat_t *ipf_nat6_icmperrorlookup __P((fr_info_t *, int)); 750extern nat_t *ipf_nat6_inlookup __P((fr_info_t *, u_int, u_int, 751 struct in6_addr *, struct in6_addr *)); 752extern u_32_t ipf_nat6_ip6subtract __P((i6addr_t *, i6addr_t *)); 753extern frentry_t *ipf_nat6_ipfin __P((fr_info_t *, u_32_t *)); 754extern frentry_t *ipf_nat6_ipfout __P((fr_info_t *, u_32_t *)); 755extern nat_t *ipf_nat6_lookupredir __P((natlookup_t *)); 756extern int ipf_nat6_newmap __P((fr_info_t *, nat_t *, natinfo_t *)); 757extern int ipf_nat6_newrdr __P((fr_info_t *, nat_t *, natinfo_t *)); 758extern nat_t *ipf_nat6_outlookup __P((fr_info_t *, u_int, u_int, 759 struct in6_addr *, struct in6_addr *)); 760extern int ipf_nat6_newrewrite __P((fr_info_t *, nat_t *, natinfo_t *)); 761extern int ipf_nat6_newdivert __P((fr_info_t *, nat_t *, natinfo_t *)); 762extern int ipf_nat6_ruleaddrinit __P((ipf_main_softc_t *, ipf_nat_softc_t *, ipnat_t *)); 763 764#endif 765 766 767#endif /* __IP_NAT_H__ */ 768