1 /* $FreeBSD$ */ 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 * $FreeBSD$ 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 #define SOLARIS (defined(sun) && (defined(__svr4__) || defined(__SVR4))) 18 #endif 19 20 #if defined(__STDC__) || defined(__GNUC__) || defined(_AIX51) 21 #define SIOCADNAT _IOW('r', 60, struct ipfobj) 22 #define SIOCRMNAT _IOW('r', 61, struct ipfobj) 23 #define SIOCGNATS _IOWR('r', 62, struct ipfobj) 24 #define SIOCGNATL _IOWR('r', 63, struct ipfobj) 25 #define SIOCPURGENAT _IOWR('r', 100, struct ipfobj) 26 #else 27 #define SIOCADNAT _IOW(r, 60, struct ipfobj) 28 #define SIOCRMNAT _IOW(r, 61, struct ipfobj) 29 #define SIOCGNATS _IOWR(r, 62, struct ipfobj) 30 #define SIOCGNATL _IOWR(r, 63, struct ipfobj) 31 #define SIOCPURGENAT _IOWR(r, 100, struct ipfobj) 32 #endif 33 34 #undef LARGE_NAT /* define this if you're setting up a system to NAT 35 * LARGE numbers of networks/hosts - i.e. in the 36 * hundreds or thousands. In such a case, you should 37 * also change the RDR_SIZE and NAT_SIZE below to more 38 * appropriate sizes. The figures below were used for 39 * a setup with 1000-2000 networks to NAT. 40 */ 41 #ifndef NAT_SIZE 42 # ifdef LARGE_NAT 43 # define NAT_SIZE 2047 44 # else 45 # define NAT_SIZE 127 46 # endif 47 #endif 48 #ifndef RDR_SIZE 49 # ifdef LARGE_NAT 50 # define RDR_SIZE 2047 51 # else 52 # define RDR_SIZE 127 53 # endif 54 #endif 55 #ifndef HOSTMAP_SIZE 56 # ifdef LARGE_NAT 57 # define HOSTMAP_SIZE 8191 58 # else 59 # define HOSTMAP_SIZE 2047 60 # endif 61 #endif 62 #ifndef NAT_TABLE_MAX 63 /* 64 * This is newly introduced and for the sake of "least surprise", the numbers 65 * present aren't what we'd normally use for creating a proper hash table. 66 */ 67 # ifdef LARGE_NAT 68 # define NAT_TABLE_MAX 180000 69 # else 70 # define NAT_TABLE_MAX 30000 71 # endif 72 #endif 73 #ifndef NAT_TABLE_SZ 74 # ifdef LARGE_NAT 75 # define NAT_TABLE_SZ 16383 76 # else 77 # define NAT_TABLE_SZ 2047 78 # endif 79 #endif 80 #ifndef APR_LABELLEN 81 #define APR_LABELLEN 16 82 #endif 83 #define NAT_HW_CKSUM 0x80000000 84 #define NAT_HW_CKSUM_PART 0x40000000 85 86 #define DEF_NAT_AGE 1200 /* 10 minutes (600 seconds) */ 87 88 struct ipstate; 89 struct ap_session; 90 91 /* 92 * This structure is used in the active NAT table and represents an 93 * active NAT session. 94 */ 95 typedef struct nat { 96 ipfmutex_t nat_lock; 97 struct nat *nat_next; 98 struct nat **nat_pnext; 99 struct nat *nat_hnext[2]; 100 struct nat **nat_phnext[2]; 101 struct hostmap *nat_hm; 102 void *nat_data; 103 struct nat **nat_me; 104 struct ipstate *nat_state; 105 struct ap_session *nat_aps; /* proxy session */ 106 frentry_t *nat_fr; /* filter rule ptr if appropriate */ 107 struct ipnat *nat_ptr; /* pointer back to the rule */ 108 void *nat_ifps[2]; 109 void *nat_sync; 110 ipftqent_t nat_tqe; 111 int nat_mtu[2]; 112 u_32_t nat_flags; 113 u_32_t nat_sumd[2]; /* ip checksum delta for data segment*/ 114 u_32_t nat_ipsumd; /* ip checksum delta for ip header */ 115 u_32_t nat_mssclamp; /* if != zero clamp MSS to this */ 116 i6addr_t nat_odst6; 117 i6addr_t nat_osrc6; 118 i6addr_t nat_ndst6; 119 i6addr_t nat_nsrc6; 120 U_QUAD_T nat_pkts[2]; 121 U_QUAD_T nat_bytes[2]; 122 union { 123 udpinfo_t nat_unu; 124 tcpinfo_t nat_unt; 125 icmpinfo_t nat_uni; 126 greinfo_t nat_ugre; 127 } nat_unold, nat_unnew; 128 int nat_use; 129 int nat_pr[2]; /* protocol for NAT */ 130 int nat_dir; 131 int nat_ref; /* reference count */ 132 u_int nat_hv[2]; 133 char nat_ifnames[2][LIFNAMSIZ]; 134 int nat_rev; /* 0 = forward, 1 = reverse */ 135 int nat_dlocal; 136 int nat_v[2]; /* 0 = old, 1 = new */ 137 u_int nat_redir; /* copy of in_redir */ 138 } nat_t; 139 140 #define nat_osrcip nat_osrc6.in4 141 #define nat_odstip nat_odst6.in4 142 #define nat_nsrcip nat_nsrc6.in4 143 #define nat_ndstip nat_ndst6.in4 144 #define nat_osrcaddr nat_osrc6.in4.s_addr 145 #define nat_odstaddr nat_odst6.in4.s_addr 146 #define nat_nsrcaddr nat_nsrc6.in4.s_addr 147 #define nat_ndstaddr nat_ndst6.in4.s_addr 148 #define nat_age nat_tqe.tqe_die 149 #define nat_osport nat_unold.nat_unt.ts_sport 150 #define nat_odport nat_unold.nat_unt.ts_dport 151 #define nat_nsport nat_unnew.nat_unt.ts_sport 152 #define nat_ndport nat_unnew.nat_unt.ts_dport 153 #define nat_oicmpid nat_unold.nat_uni.ici_id 154 #define nat_nicmpid nat_unnew.nat_uni.ici_id 155 #define nat_type nat_unold.nat_uni.ici_type 156 #define nat_oseq nat_unold.nat_uni.ici_seq 157 #define nat_nseq nat_unnew.nat_uni.ici_seq 158 #define nat_tcpstate nat_tqe.tqe_state 159 #define nat_die nat_tqe.tqe_die 160 #define nat_touched nat_tqe.tqe_touched 161 162 /* 163 * Values for nat_dir 164 */ 165 #define NAT_INBOUND 0 166 #define NAT_OUTBOUND 1 167 #define NAT_ENCAPIN 2 168 #define NAT_ENCAPOUT 3 169 #define NAT_DIVERTIN 4 170 #define NAT_DIVERTOUT 5 171 172 /* 173 * Definitions for nat_flags 174 */ 175 #define NAT_TCP 0x0001 /* IPN_TCP */ 176 #define NAT_UDP 0x0002 /* IPN_UDP */ 177 #define NAT_ICMPERR 0x0004 /* IPN_ICMPERR */ 178 #define NAT_ICMPQUERY 0x0008 /* IPN_ICMPQUERY */ 179 #define NAT_SEARCH 0x0010 180 #define NAT_SLAVE 0x0020 /* Slave connection for a proxy */ 181 #define NAT_NOTRULEPORT 0x0040 /* Don't use the port # in the NAT rule */ 182 183 #define NAT_TCPUDP (NAT_TCP|NAT_UDP) 184 #define NAT_TCPUDPICMP (NAT_TCP|NAT_UDP|NAT_ICMPERR) 185 #define NAT_TCPUDPICMPQ (NAT_TCP|NAT_UDP|NAT_ICMPQUERY) 186 #define NAT_FROMRULE (NAT_TCP|NAT_UDP) 187 188 /* 0x0100 reserved for FI_W_SPORT */ 189 /* 0x0200 reserved for FI_W_DPORT */ 190 /* 0x0400 reserved for FI_W_SADDR */ 191 /* 0x0800 reserved for FI_W_DADDR */ 192 /* 0x1000 reserved for FI_W_NEWFR */ 193 /* 0x2000 reserved for SI_CLONE */ 194 /* 0x4000 reserved for SI_CLONED */ 195 /* 0x8000 reserved for SI_IGNOREPKT */ 196 197 #define NAT_DEBUG 0x800000 198 199 typedef struct nat_addr_s { 200 i6addr_t na_addr[2]; 201 i6addr_t na_nextaddr; 202 int na_atype; 203 int na_function; 204 } nat_addr_t; 205 206 #define na_nextip na_nextaddr.in4.s_addr 207 #define na_nextip6 na_nextaddr.in6 208 #define na_num na_addr[0].iplookupnum 209 #define na_type na_addr[0].iplookuptype 210 #define na_subtype na_addr[0].iplookupsubtype 211 #define na_ptr na_addr[1].iplookupptr 212 #define na_func na_addr[1].iplookupfunc 213 214 215 /* 216 * This structure represents an actual NAT rule, loaded by ipnat. 217 */ 218 typedef struct ipnat { 219 ipfmutex_t in_lock; 220 struct ipnat *in_next; /* NAT rule list next */ 221 struct ipnat **in_pnext; /* prior rdr next ptr */ 222 struct ipnat *in_rnext; /* rdr rule hash next */ 223 struct ipnat **in_prnext; /* prior rdr next ptr */ 224 struct ipnat *in_mnext; /* map rule hash next */ 225 struct ipnat **in_pmnext; /* prior map next ptr */ 226 struct ipftq *in_tqehead[2]; 227 void *in_ifps[2]; 228 void *in_apr; 229 char *in_comment; 230 mb_t *in_divmp; 231 void *in_pconf; 232 U_QUAD_T in_pkts[2]; 233 U_QUAD_T in_bytes[2]; 234 u_long in_space; 235 u_long in_hits; 236 int in_size; 237 int in_use; 238 u_int in_hv[2]; 239 int in_flineno; /* conf. file line number */ 240 int in_stepnext; 241 int in_dlocal; 242 u_short in_dpnext; 243 u_short in_spnext; 244 /* From here to the end is covered by IPN_CMPSIZ */ 245 u_char in_v[2]; /* 0 = old, 1 = new */ 246 u_32_t in_flags; 247 u_32_t in_mssclamp; /* if != 0 clamp MSS to this */ 248 u_int in_age[2]; 249 int in_redir; /* see below for values */ 250 int in_pr[2]; /* protocol. */ 251 nat_addr_t in_ndst; 252 nat_addr_t in_nsrc; 253 nat_addr_t in_osrc; 254 nat_addr_t in_odst; 255 frtuc_t in_tuc; 256 u_short in_ppip; /* ports per IP. */ 257 u_short in_ippip; /* IP #'s per IP# */ 258 u_short in_ndports[2]; 259 u_short in_nsports[2]; 260 int in_ifnames[2]; 261 int in_plabel; /* proxy label. */ 262 int in_pconfig; /* proxy label. */ 263 ipftag_t in_tag; 264 int in_namelen; 265 char in_names[1]; 266 } ipnat_t; 267 268 /* 269 * MAP-IN MAP-OUT RDR-IN RDR-OUT 270 * osrc X == src == src X 271 * odst X == dst == dst X 272 * nsrc == dst X X == dst 273 * ndst == src X X == src 274 */ 275 #define in_dpmin in_ndports[0] /* Also holds static redir port */ 276 #define in_dpmax in_ndports[1] 277 #define in_spmin in_nsports[0] /* Also holds static redir port */ 278 #define in_spmax in_nsports[1] 279 #define in_ndport in_ndports[0] 280 #define in_nsport in_nsports[0] 281 #define in_dipnext in_ndst.na_nextaddr.in4 282 #define in_dipnext6 in_ndst.na_nextaddr 283 #define in_dnip in_ndst.na_nextaddr.in4.s_addr 284 #define in_dnip6 in_ndst.na_nextaddr 285 #define in_sipnext in_nsrc.na_nextaddr.in4 286 #define in_snip in_nsrc.na_nextaddr.in4.s_addr 287 #define in_snip6 in_nsrc.na_nextaddr 288 #define in_odstip in_odst.na_addr[0].in4 289 #define in_odstip6 in_odst.na_addr[0] 290 #define in_odstaddr in_odst.na_addr[0].in4.s_addr 291 #define in_odstmsk in_odst.na_addr[1].in4.s_addr 292 #define in_odstmsk6 in_odst.na_addr[1] 293 #define in_odstatype in_odst.na_atype 294 #define in_osrcip in_osrc.na_addr[0].in4 295 #define in_osrcip6 in_osrc.na_addr[0] 296 #define in_osrcaddr in_osrc.na_addr[0].in4.s_addr 297 #define in_osrcmsk in_osrc.na_addr[1].in4.s_addr 298 #define in_osrcmsk6 in_osrc.na_addr[1] 299 #define in_osrcatype in_osrc.na_atype 300 #define in_ndstip in_ndst.na_addr[0].in4 301 #define in_ndstip6 in_ndst.na_addr[0] 302 #define in_ndstaddr in_ndst.na_addr[0].in4.s_addr 303 #define in_ndstmsk in_ndst.na_addr[1].in4.s_addr 304 #define in_ndstmsk6 in_ndst.na_addr[1] 305 #define in_ndstatype in_ndst.na_atype 306 #define in_ndstafunc in_ndst.na_function 307 #define in_nsrcip in_nsrc.na_addr[0].in4 308 #define in_nsrcip6 in_nsrc.na_addr[0] 309 #define in_nsrcaddr in_nsrc.na_addr[0].in4.s_addr 310 #define in_nsrcmsk in_nsrc.na_addr[1].in4.s_addr 311 #define in_nsrcmsk6 in_nsrc.na_addr[1] 312 #define in_nsrcatype in_nsrc.na_atype 313 #define in_nsrcafunc in_nsrc.na_function 314 #define in_scmp in_tuc.ftu_scmp 315 #define in_dcmp in_tuc.ftu_dcmp 316 #define in_stop in_tuc.ftu_stop 317 #define in_dtop in_tuc.ftu_dtop 318 #define in_osport in_tuc.ftu_sport 319 #define in_odport in_tuc.ftu_dport 320 #define in_ndstnum in_ndst.na_addr[0].iplookupnum 321 #define in_ndsttype in_ndst.na_addr[0].iplookuptype 322 #define in_ndstptr in_ndst.na_addr[1].iplookupptr 323 #define in_ndstfunc in_ndst.na_addr[1].iplookupfunc 324 #define in_nsrcnum in_nsrc.na_addr[0].iplookupnum 325 #define in_nsrctype in_nsrc.na_addr[0].iplookuptype 326 #define in_nsrcptr in_nsrc.na_addr[1].iplookupptr 327 #define in_nsrcfunc in_nsrc.na_addr[1].iplookupfunc 328 #define in_odstnum in_odst.na_addr[0].iplookupnum 329 #define in_odsttype in_odst.na_addr[0].iplookuptype 330 #define in_odstptr in_odst.na_addr[1].iplookupptr 331 #define in_odstfunc in_odst.na_addr[1].iplookupfunc 332 #define in_osrcnum in_osrc.na_addr[0].iplookupnum 333 #define in_osrctype in_osrc.na_addr[0].iplookuptype 334 #define in_osrcptr in_osrc.na_addr[1].iplookupptr 335 #define in_osrcfunc in_osrc.na_addr[1].iplookupfunc 336 #define in_icmpidmin in_nsports[0] 337 #define in_icmpidmax in_nsports[1] 338 339 /* 340 * Bit definitions for in_flags 341 */ 342 #define IPN_ANY 0x00000 343 #define IPN_TCP 0x00001 344 #define IPN_UDP 0x00002 345 #define IPN_TCPUDP (IPN_TCP|IPN_UDP) 346 #define IPN_ICMPERR 0x00004 347 #define IPN_TCPUDPICMP (IPN_TCP|IPN_UDP|IPN_ICMPERR) 348 #define IPN_ICMPQUERY 0x00008 349 #define IPN_TCPUDPICMPQ (IPN_TCP|IPN_UDP|IPN_ICMPQUERY) 350 #define IPN_RF (IPN_TCPUDP|IPN_DELETE|IPN_ICMPERR) 351 #define IPN_AUTOPORTMAP 0x00010 352 #define IPN_FILTER 0x00020 353 #define IPN_SPLIT 0x00040 354 #define IPN_ROUNDR 0x00080 355 #define IPN_SIPRANGE 0x00100 356 #define IPN_DIPRANGE 0x00200 357 #define IPN_NOTSRC 0x00400 358 #define IPN_NOTDST 0x00800 359 #define IPN_NO 0x01000 360 #define IPN_DYNSRCIP 0x02000 /* dynamic src IP# */ 361 #define IPN_DYNDSTIP 0x04000 /* dynamic dst IP# */ 362 #define IPN_DELETE 0x08000 363 #define IPN_STICKY 0x10000 364 #define IPN_FRAG 0x20000 365 #define IPN_FIXEDSPORT 0x40000 366 #define IPN_FIXEDDPORT 0x80000 367 #define IPN_FINDFORWARD 0x100000 368 #define IPN_IN 0x200000 369 #define IPN_SEQUENTIAL 0x400000 370 #define IPN_PURGE 0x800000 371 #define IPN_PROXYRULE 0x1000000 372 #define IPN_USERFLAGS (IPN_TCPUDP|IPN_AUTOPORTMAP|IPN_SIPRANGE|IPN_SPLIT|\ 373 IPN_ROUNDR|IPN_FILTER|IPN_NOTSRC|IPN_NOTDST|IPN_NO|\ 374 IPN_FRAG|IPN_STICKY|IPN_FIXEDDPORT|IPN_ICMPQUERY|\ 375 IPN_DIPRANGE|IPN_SEQUENTIAL|IPN_PURGE) 376 377 /* 378 * Values for in_redir 379 */ 380 #define NAT_MAP 0x01 381 #define NAT_REDIRECT 0x02 382 #define NAT_BIMAP (NAT_MAP|NAT_REDIRECT) 383 #define NAT_MAPBLK 0x04 384 #define NAT_REWRITE 0x08 385 #define NAT_ENCAP 0x10 386 #define NAT_DIVERTUDP 0x20 387 388 #define MAPBLK_MINPORT 1024 /* don't use reserved ports for src port */ 389 #define USABLE_PORTS (65536 - MAPBLK_MINPORT) 390 391 #define IPN_CMPSIZ (sizeof(ipnat_t) - offsetof(ipnat_t, in_v)) 392 393 typedef struct natlookup { 394 i6addr_t nl_inipaddr; 395 i6addr_t nl_outipaddr; 396 i6addr_t nl_realipaddr; 397 int nl_v; 398 int nl_flags; 399 u_short nl_inport; 400 u_short nl_outport; 401 u_short nl_realport; 402 } natlookup_t; 403 404 #define nl_inip nl_inipaddr.in4 405 #define nl_outip nl_outipaddr.in4 406 #define nl_realip nl_realipaddr.in4 407 #define nl_inip6 nl_inipaddr.in6 408 #define nl_outip6 nl_outipaddr.in6 409 #define nl_realip6 nl_realipaddr.in6 410 411 412 typedef struct nat_save { 413 void *ipn_next; 414 struct nat ipn_nat; 415 struct ipnat ipn_ipnat; 416 struct frentry ipn_fr; 417 int ipn_dsize; 418 char ipn_data[4]; 419 } nat_save_t; 420 421 #define ipn_rule ipn_nat.nat_fr 422 423 typedef struct natget { 424 void *ng_ptr; 425 int ng_sz; 426 } natget_t; 427 428 429 /* 430 * This structure gets used to help NAT sessions keep the same NAT rule (and 431 * thus translation for IP address) when: 432 * (a) round-robin redirects are in use 433 * (b) different IP add 434 */ 435 typedef struct hostmap { 436 struct hostmap *hm_hnext; 437 struct hostmap **hm_phnext; 438 struct hostmap *hm_next; 439 struct hostmap **hm_pnext; 440 struct ipnat *hm_ipnat; 441 i6addr_t hm_osrcip6; 442 i6addr_t hm_odstip6; 443 i6addr_t hm_nsrcip6; 444 i6addr_t hm_ndstip6; 445 u_32_t hm_port; 446 int hm_ref; 447 int hm_hv; 448 int hm_v; 449 } hostmap_t; 450 451 #define hm_osrcip hm_osrcip6.in4 452 #define hm_odstip hm_odstip6.in4 453 #define hm_nsrcip hm_nsrcip6.in4 454 #define hm_ndstip hm_ndstip6.in4 455 #define hm_osrc6 hm_osrcip6.in6 456 #define hm_odst6 hm_odstip6.in6 457 #define hm_nsrc6 hm_nsrcip6.in6 458 #define hm_ndst6 hm_ndstip6.in6 459 460 461 /* 462 * Structure used to pass information in to nat_newmap and nat_newrdr. 463 */ 464 typedef struct natinfo { 465 ipnat_t *nai_np; 466 u_32_t nai_sum1; 467 u_32_t nai_sum2; 468 struct in_addr nai_ip; /* In host byte order */ 469 u_short nai_port; 470 u_short nai_nport; 471 u_short nai_sport; 472 u_short nai_dport; 473 } natinfo_t; 474 475 476 typedef struct nat_stat_side { 477 u_int *ns_bucketlen; 478 nat_t **ns_table; 479 u_long ns_added; 480 u_long ns_appr_fail; 481 u_long ns_badnat; 482 u_long ns_badnatnew; 483 u_long ns_badnextaddr; 484 u_long ns_bucket_max; 485 u_long ns_clone_nomem; 486 u_long ns_decap_bad; 487 u_long ns_decap_fail; 488 u_long ns_decap_pullup; 489 u_long ns_divert_dup; 490 u_long ns_divert_exist; 491 u_long ns_drop; 492 u_long ns_encap_dup; 493 u_long ns_encap_pullup; 494 u_long ns_exhausted; 495 u_long ns_icmp_address; 496 u_long ns_icmp_basic; 497 u_long ns_icmp_mbuf; 498 u_long ns_icmp_notfound; 499 u_long ns_icmp_rebuild; 500 u_long ns_icmp_short; 501 u_long ns_icmp_size; 502 u_long ns_ifpaddrfail; 503 u_long ns_ignored; 504 u_long ns_insert_fail; 505 u_long ns_inuse; 506 u_long ns_log; 507 u_long ns_lookup_miss; 508 u_long ns_lookup_nowild; 509 u_long ns_new_ifpaddr; 510 u_long ns_memfail; 511 u_long ns_table_max; 512 u_long ns_translated; 513 u_long ns_unfinalised; 514 u_long ns_wrap; 515 u_long ns_xlate_null; 516 u_long ns_xlate_exists; 517 u_long ns_ipf_proxy_fail; 518 u_long ns_uncreate[2]; 519 } nat_stat_side_t; 520 521 522 typedef struct natstat { 523 nat_t *ns_instances; 524 ipnat_t *ns_list; 525 hostmap_t *ns_maplist; 526 hostmap_t **ns_maptable; 527 u_int ns_active; 528 u_long ns_addtrpnt; 529 u_long ns_divert_build; 530 u_long ns_expire; 531 u_long ns_flush_all; 532 u_long ns_flush_closing; 533 u_long ns_flush_queue; 534 u_long ns_flush_state; 535 u_long ns_flush_timeout; 536 u_long ns_hm_new; 537 u_long ns_hm_newfail; 538 u_long ns_hm_addref; 539 u_long ns_hm_nullnp; 540 u_long ns_log_ok; 541 u_long ns_log_fail; 542 u_int ns_hostmap_sz; 543 u_int ns_nattab_sz; 544 u_int ns_nattab_max; 545 u_int ns_orphans; 546 u_int ns_rules; 547 u_int ns_rules_map; 548 u_int ns_rules_rdr; 549 u_int ns_rultab_sz; 550 u_int ns_rdrtab_sz; 551 u_32_t ns_ticks; 552 u_int ns_trpntab_sz; 553 u_int ns_wilds; 554 u_long ns_proto[256]; 555 nat_stat_side_t ns_side[2]; 556 #ifdef USE_INET6 557 nat_stat_side_t ns_side6[2]; 558 #endif 559 } natstat_t; 560 561 typedef struct natlog { 562 i6addr_t nl_osrcip; 563 i6addr_t nl_odstip; 564 i6addr_t nl_nsrcip; 565 i6addr_t nl_ndstip; 566 u_short nl_osrcport; 567 u_short nl_odstport; 568 u_short nl_nsrcport; 569 u_short nl_ndstport; 570 int nl_action; 571 int nl_type; 572 int nl_rule; 573 U_QUAD_T nl_pkts[2]; 574 U_QUAD_T nl_bytes[2]; 575 u_char nl_p[2]; 576 u_char nl_v[2]; 577 u_char nl_ifnames[2][LIFNAMSIZ]; 578 } natlog_t; 579 580 581 #define NL_NEW 0 582 #define NL_CLONE 1 583 #define NL_PURGE 0xfffc 584 #define NL_DESTROY 0xfffd 585 #define NL_FLUSH 0xfffe 586 #define NL_EXPIRE 0xffff 587 588 #define NAT_HASH_FN(_k,_l,_m) (((_k) + ((_k) >> 12) + _l) % (_m)) 589 #define NAT_HASH_FN6(_k,_l,_m) ((((u_32_t *)(_k))[3] \ 590 + (((u_32_t *)(_k))[3] >> 12) \ 591 + (((u_32_t *)(_k))[2]) \ 592 + (((u_32_t *)(_k))[2] >> 12) \ 593 + (((u_32_t *)(_k))[1]) \ 594 + (((u_32_t *)(_k))[1] >> 12) \ 595 + (((u_32_t *)(_k))[0]) \ 596 + (((u_32_t *)(_k))[0] >> 12) \ 597 + _l) % (_m)) 598 599 #define LONG_SUM(_i) (((_i) & 0xffff) + ((_i) >> 16)) 600 #define LONG_SUM6(_i) (LONG_SUM(ntohl(((u_32_t *)(_i))[0])) + \ 601 LONG_SUM(ntohl(((u_32_t *)(_i))[1])) + \ 602 LONG_SUM(ntohl(((u_32_t *)(_i))[2])) + \ 603 LONG_SUM(ntohl(((u_32_t *)(_i))[3]))) 604 605 #define CALC_SUMD(s1, s2, sd) { \ 606 (s1) = ((s1) & 0xffff) + ((s1) >> 16); \ 607 (s2) = ((s2) & 0xffff) + ((s2) >> 16); \ 608 /* Do it twice */ \ 609 (s1) = ((s1) & 0xffff) + ((s1) >> 16); \ 610 (s2) = ((s2) & 0xffff) + ((s2) >> 16); \ 611 /* Because ~1 == -2, We really need ~1 == -1 */ \ 612 if ((s1) > (s2)) (s2)--; \ 613 (sd) = (s2) - (s1); \ 614 (sd) = ((sd) & 0xffff) + ((sd) >> 16); } 615 616 #define NAT_SYSSPACE 0x80000000 617 #define NAT_LOCKHELD 0x40000000 618 619 /* 620 * This is present in ip_nat.h because it needs to be shared between 621 * ip_nat.c and ip_nat6.c 622 */ 623 typedef struct ipf_nat_softc_s { 624 ipfmutex_t ipf_nat_new; 625 ipfmutex_t ipf_nat_io; 626 int ipf_nat_doflush; 627 int ipf_nat_logging; 628 int ipf_nat_lock; 629 int ipf_nat_inited; 630 int ipf_nat_table_wm_high; 631 int ipf_nat_table_wm_low; 632 u_int ipf_nat_table_max; 633 u_int ipf_nat_table_sz; 634 u_int ipf_nat_maprules_sz; 635 u_int ipf_nat_rdrrules_sz; 636 u_int ipf_nat_hostmap_sz; 637 u_int ipf_nat_maxbucket; 638 u_int ipf_nat_last_force_flush; 639 u_int ipf_nat_defage; 640 u_int ipf_nat_defipage; 641 u_int ipf_nat_deficmpage; 642 ipf_v4_masktab_t ipf_nat_map_mask; 643 ipf_v6_masktab_t ipf_nat6_map_mask; 644 ipf_v4_masktab_t ipf_nat_rdr_mask; 645 ipf_v6_masktab_t ipf_nat6_rdr_mask; 646 nat_t **ipf_nat_table[2]; 647 nat_t *ipf_nat_instances; 648 ipnat_t *ipf_nat_list; 649 ipnat_t **ipf_nat_list_tail; 650 ipnat_t **ipf_nat_map_rules; 651 ipnat_t **ipf_nat_rdr_rules; 652 ipftq_t *ipf_nat_utqe; 653 hostmap_t **ipf_hm_maptable ; 654 hostmap_t *ipf_hm_maplist ; 655 ipftuneable_t *ipf_nat_tune; 656 ipftq_t ipf_nat_udptq; 657 ipftq_t ipf_nat_udpacktq; 658 ipftq_t ipf_nat_icmptq; 659 ipftq_t ipf_nat_icmpacktq; 660 ipftq_t ipf_nat_iptq; 661 ipftq_t ipf_nat_pending; 662 ipftq_t ipf_nat_tcptq[IPF_TCP_NSTATES]; 663 natstat_t ipf_nat_stats; 664 } ipf_nat_softc_t ; 665 666 #define ipf_nat_map_max ipf_nat_map_mask.imt4_max 667 #define ipf_nat_rdr_max ipf_nat_rdr_mask.imt4_max 668 #define ipf_nat6_map_max ipf_nat6_map_mask.imt6_max 669 #define ipf_nat6_rdr_max ipf_nat6_rdr_mask.imt6_max 670 #define ipf_nat_map_active_masks ipf_nat_map_mask.imt4_active 671 #define ipf_nat_rdr_active_masks ipf_nat_rdr_mask.imt4_active 672 #define ipf_nat6_map_active_masks ipf_nat6_map_mask.imt6_active 673 #define ipf_nat6_rdr_active_masks ipf_nat6_rdr_mask.imt6_active 674 675 extern frentry_t ipfnatblock; 676 677 extern void ipf_fix_datacksum __P((u_short *, u_32_t)); 678 extern void ipf_fix_incksum __P((int, u_short *, u_32_t, u_32_t)); 679 extern void ipf_fix_outcksum __P((int, u_short *, u_32_t, u_32_t)); 680 681 extern int ipf_nat_checkin __P((fr_info_t *, u_32_t *)); 682 extern int ipf_nat_checkout __P((fr_info_t *, u_32_t *)); 683 extern void ipf_nat_delete __P((ipf_main_softc_t *, struct nat *, int)); 684 extern void ipf_nat_deref __P((ipf_main_softc_t *, nat_t **)); 685 extern void ipf_nat_expire __P((ipf_main_softc_t *)); 686 extern int ipf_nat_hashtab_add __P((ipf_main_softc_t *, 687 ipf_nat_softc_t *, nat_t *)); 688 extern void ipf_nat_hostmapdel __P((ipf_main_softc_t *, hostmap_t **)); 689 extern int ipf_nat_hostmap_rehash __P((ipf_main_softc_t *, 690 ipftuneable_t *, ipftuneval_t *)); 691 extern nat_t *ipf_nat_icmperrorlookup __P((fr_info_t *, int)); 692 extern nat_t *ipf_nat_icmperror __P((fr_info_t *, u_int *, int)); 693 #if defined(__OpenBSD__) 694 extern void ipf_nat_ifdetach __P((void *)); 695 #endif 696 extern int ipf_nat_init __P((void)); 697 extern nat_t *ipf_nat_inlookup __P((fr_info_t *, u_int, u_int, 698 struct in_addr, struct in_addr)); 699 extern int ipf_nat_in __P((fr_info_t *, nat_t *, int, u_32_t)); 700 extern int ipf_nat_insert __P((ipf_main_softc_t *, ipf_nat_softc_t *, 701 nat_t *)); 702 extern int ipf_nat_ioctl __P((ipf_main_softc_t *, caddr_t, ioctlcmd_t, 703 int, int, void *)); 704 extern void ipf_nat_log __P((ipf_main_softc_t *, ipf_nat_softc_t *, 705 struct nat *, u_int)); 706 extern nat_t *ipf_nat_lookupredir __P((natlookup_t *)); 707 extern nat_t *ipf_nat_maplookup __P((void *, u_int, struct in_addr, 708 struct in_addr)); 709 extern nat_t *ipf_nat_add __P((fr_info_t *, ipnat_t *, nat_t **, 710 u_int, int)); 711 extern int ipf_nat_out __P((fr_info_t *, nat_t *, int, u_32_t)); 712 extern nat_t *ipf_nat_outlookup __P((fr_info_t *, u_int, u_int, 713 struct in_addr, struct in_addr)); 714 extern u_short *ipf_nat_proto __P((fr_info_t *, nat_t *, u_int)); 715 extern void ipf_nat_rule_deref __P((ipf_main_softc_t *, ipnat_t **)); 716 extern void ipf_nat_setqueue __P((ipf_main_softc_t *, ipf_nat_softc_t *, 717 nat_t *)); 718 extern void ipf_nat_setpending __P((ipf_main_softc_t *, nat_t *)); 719 extern nat_t *ipf_nat_tnlookup __P((fr_info_t *, int)); 720 extern void ipf_nat_update __P((fr_info_t *, nat_t *)); 721 extern int ipf_nat_rehash __P((ipf_main_softc_t *, ipftuneable_t *, 722 ipftuneval_t *)); 723 extern int ipf_nat_rehash_rules __P((ipf_main_softc_t *, ipftuneable_t *, 724 ipftuneval_t *)); 725 extern int ipf_nat_settimeout __P((struct ipf_main_softc_s *, 726 ipftuneable_t *, ipftuneval_t *)); 727 extern void ipf_nat_sync __P((ipf_main_softc_t *, void *)); 728 729 extern nat_t *ipf_nat_clone __P((fr_info_t *, nat_t *)); 730 extern void ipf_nat_delmap __P((ipf_nat_softc_t *, ipnat_t *)); 731 extern void ipf_nat_delrdr __P((ipf_nat_softc_t *, ipnat_t *)); 732 extern int ipf_nat_wildok __P((nat_t *, int, int, int, int)); 733 extern void ipf_nat_setlock __P((void *, int)); 734 extern void ipf_nat_load __P((void)); 735 extern void *ipf_nat_soft_create __P((ipf_main_softc_t *)); 736 extern int ipf_nat_soft_init __P((ipf_main_softc_t *, void *)); 737 extern void ipf_nat_soft_destroy __P((ipf_main_softc_t *, void *)); 738 extern int ipf_nat_soft_fini __P((ipf_main_softc_t *, void *)); 739 extern int ipf_nat_main_load __P((void)); 740 extern int ipf_nat_main_unload __P((void)); 741 extern ipftq_t *ipf_nat_add_tq __P((ipf_main_softc_t *, int)); 742 extern void ipf_nat_uncreate __P((fr_info_t *)); 743 744 #ifdef USE_INET6 745 extern nat_t *ipf_nat6_add __P((fr_info_t *, ipnat_t *, nat_t **, 746 u_int, int)); 747 extern void ipf_nat6_addrdr __P((ipf_nat_softc_t *, ipnat_t *)); 748 extern void ipf_nat6_addmap __P((ipf_nat_softc_t *, ipnat_t *)); 749 extern void ipf_nat6_addencap __P((ipf_nat_softc_t *, ipnat_t *)); 750 extern int ipf_nat6_checkout __P((fr_info_t *, u_32_t *)); 751 extern int ipf_nat6_checkin __P((fr_info_t *, u_32_t *)); 752 extern void ipf_nat6_delmap __P((ipf_nat_softc_t *, ipnat_t *)); 753 extern void ipf_nat6_delrdr __P((ipf_nat_softc_t *, ipnat_t *)); 754 extern int ipf_nat6_finalise __P((fr_info_t *, nat_t *)); 755 extern nat_t *ipf_nat6_icmperror __P((fr_info_t *, u_int *, int)); 756 extern nat_t *ipf_nat6_icmperrorlookup __P((fr_info_t *, int)); 757 extern nat_t *ipf_nat6_inlookup __P((fr_info_t *, u_int, u_int, 758 struct in6_addr *, struct in6_addr *)); 759 extern u_32_t ipf_nat6_ip6subtract __P((i6addr_t *, i6addr_t *)); 760 extern frentry_t *ipf_nat6_ipfin __P((fr_info_t *, u_32_t *)); 761 extern frentry_t *ipf_nat6_ipfout __P((fr_info_t *, u_32_t *)); 762 extern nat_t *ipf_nat6_lookupredir __P((natlookup_t *)); 763 extern int ipf_nat6_newmap __P((fr_info_t *, nat_t *, natinfo_t *)); 764 extern int ipf_nat6_newrdr __P((fr_info_t *, nat_t *, natinfo_t *)); 765 extern nat_t *ipf_nat6_outlookup __P((fr_info_t *, u_int, u_int, 766 struct in6_addr *, struct in6_addr *)); 767 extern int ipf_nat6_newrewrite __P((fr_info_t *, nat_t *, natinfo_t *)); 768 extern int ipf_nat6_newdivert __P((fr_info_t *, nat_t *, natinfo_t *)); 769 extern int ipf_nat6_ruleaddrinit __P((ipf_main_softc_t *, ipf_nat_softc_t *, ipnat_t *)); 770 771 #endif 772 773 774 #endif /* __IP_NAT_H__ */ 775