ip_nat.h revision 1.3
1 /* $NetBSD: ip_nat.h,v 1.3 2012/07/22 14:27:51 darrenr Exp $ */ 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 * Id: ip_nat.h,v 1.1.1.2 2012/07/22 13:45:29 darrenr Exp 10 */ 11 12 #ifndef __IP_NAT_H__ 13 #define __IP_NAT_H__ 14 15 #ifndef SOLARIS 16 #define SOLARIS (defined(sun) && (defined(__svr4__) || defined(__SVR4))) 17 #endif 18 19 #if defined(__STDC__) || defined(__GNUC__) || defined(_AIX51) 20 #define SIOCADNAT _IOW('r', 60, struct ipfobj) 21 #define SIOCRMNAT _IOW('r', 61, struct ipfobj) 22 #define SIOCGNATS _IOWR('r', 62, struct ipfobj) 23 #define SIOCGNATL _IOWR('r', 63, struct ipfobj) 24 #define SIOCPURGENAT _IOWR('r', 100, struct ipfobj) 25 #else 26 #define SIOCADNAT _IOW(r, 60, struct ipfobj) 27 #define SIOCRMNAT _IOW(r, 61, struct ipfobj) 28 #define SIOCGNATS _IOWR(r, 62, struct ipfobj) 29 #define SIOCGNATL _IOWR(r, 63, struct ipfobj) 30 #define SIOCPURGENAT _IOWR(r, 100, struct ipfobj) 31 #endif 32 33 #undef LARGE_NAT /* define this if you're setting up a system to NAT 34 * LARGE numbers of networks/hosts - i.e. in the 35 * hundreds or thousands. In such a case, you should 36 * also change the RDR_SIZE and NAT_SIZE below to more 37 * appropriate sizes. The figures below were used for 38 * a setup with 1000-2000 networks to NAT. 39 */ 40 #ifndef NAT_SIZE 41 # ifdef LARGE_NAT 42 # define NAT_SIZE 2047 43 # else 44 # define NAT_SIZE 127 45 # endif 46 #endif 47 #ifndef RDR_SIZE 48 # ifdef LARGE_NAT 49 # define RDR_SIZE 2047 50 # else 51 # define RDR_SIZE 127 52 # endif 53 #endif 54 #ifndef HOSTMAP_SIZE 55 # ifdef LARGE_NAT 56 # define HOSTMAP_SIZE 8191 57 # else 58 # define HOSTMAP_SIZE 2047 59 # endif 60 #endif 61 #ifndef NAT_TABLE_MAX 62 /* 63 * This is newly introduced and for the sake of "least surprise", the numbers 64 * present aren't what we'd normally use for creating a proper hash table. 65 */ 66 # ifdef LARGE_NAT 67 # define NAT_TABLE_MAX 180000 68 # else 69 # define NAT_TABLE_MAX 30000 70 # endif 71 #endif 72 #ifndef NAT_TABLE_SZ 73 # ifdef LARGE_NAT 74 # define NAT_TABLE_SZ 16383 75 # else 76 # define NAT_TABLE_SZ 2047 77 # endif 78 #endif 79 #ifndef APR_LABELLEN 80 #define APR_LABELLEN 16 81 #endif 82 #define NAT_HW_CKSUM 0x80000000 83 #define NAT_HW_CKSUM_PART 0x40000000 84 85 #define DEF_NAT_AGE 1200 /* 10 minutes (600 seconds) */ 86 87 struct ipstate; 88 struct ap_session; 89 90 /* 91 * This structure is used in the active NAT table and represents an 92 * active NAT session. 93 */ 94 typedef struct nat { 95 ipfmutex_t nat_lock; 96 struct nat *nat_next; 97 struct nat **nat_pnext; 98 struct nat *nat_hnext[2]; 99 struct nat **nat_phnext[2]; 100 struct hostmap *nat_hm; 101 void *nat_data; 102 struct nat **nat_me; 103 struct ipstate *nat_state; 104 struct ap_session *nat_aps; /* proxy session */ 105 frentry_t *nat_fr; /* filter rule ptr if appropriate */ 106 struct ipnat *nat_ptr; /* pointer back to the rule */ 107 void *nat_ifps[2]; 108 void *nat_sync; 109 ipftqent_t nat_tqe; 110 int nat_mtu[2]; 111 u_32_t nat_flags; 112 u_32_t nat_sumd[2]; /* ip checksum delta for data segment*/ 113 u_32_t nat_ipsumd; /* ip checksum delta for ip header */ 114 u_32_t nat_mssclamp; /* if != zero clamp MSS to this */ 115 i6addr_t nat_odst6; 116 i6addr_t nat_osrc6; 117 i6addr_t nat_ndst6; 118 i6addr_t nat_nsrc6; 119 U_QUAD_T nat_pkts[2]; 120 U_QUAD_T nat_bytes[2]; 121 union { 122 udpinfo_t nat_unu; 123 tcpinfo_t nat_unt; 124 icmpinfo_t nat_uni; 125 greinfo_t nat_ugre; 126 } nat_unold, nat_unnew; 127 int nat_use; 128 int nat_pr[2]; /* protocol for NAT */ 129 int nat_dir; 130 int nat_ref; /* reference count */ 131 u_int nat_hv[2]; 132 char nat_ifnames[2][LIFNAMSIZ]; 133 int nat_rev; /* 0 = forward, 1 = reverse */ 134 int nat_dlocal; 135 int nat_v[2]; /* 0 = old, 1 = new */ 136 u_int nat_redir; /* copy of in_redir */ 137 } nat_t; 138 139 #define nat_osrcip nat_osrc6.in4 140 #define nat_odstip nat_odst6.in4 141 #define nat_nsrcip nat_nsrc6.in4 142 #define nat_ndstip nat_ndst6.in4 143 #define nat_osrcaddr nat_osrc6.in4.s_addr 144 #define nat_odstaddr nat_odst6.in4.s_addr 145 #define nat_nsrcaddr nat_nsrc6.in4.s_addr 146 #define nat_ndstaddr nat_ndst6.in4.s_addr 147 #define nat_age nat_tqe.tqe_die 148 #define nat_osport nat_unold.nat_unt.ts_sport 149 #define nat_odport nat_unold.nat_unt.ts_dport 150 #define nat_nsport nat_unnew.nat_unt.ts_sport 151 #define nat_ndport nat_unnew.nat_unt.ts_dport 152 #define nat_oicmpid nat_unold.nat_uni.ici_id 153 #define nat_nicmpid nat_unnew.nat_uni.ici_id 154 #define nat_type nat_unold.nat_uni.ici_type 155 #define nat_oseq nat_unold.nat_uni.ici_seq 156 #define nat_nseq nat_unnew.nat_uni.ici_seq 157 #define nat_tcpstate nat_tqe.tqe_state 158 #define nat_die nat_tqe.tqe_die 159 #define nat_touched nat_tqe.tqe_touched 160 161 /* 162 * Values for nat_dir 163 */ 164 #define NAT_INBOUND 0 165 #define NAT_OUTBOUND 1 166 #define NAT_ENCAPIN 2 167 #define NAT_ENCAPOUT 3 168 #define NAT_DIVERTIN 4 169 #define NAT_DIVERTOUT 5 170 171 /* 172 * Definitions for nat_flags 173 */ 174 #define NAT_TCP 0x0001 /* IPN_TCP */ 175 #define NAT_UDP 0x0002 /* IPN_UDP */ 176 #define NAT_ICMPERR 0x0004 /* IPN_ICMPERR */ 177 #define NAT_ICMPQUERY 0x0008 /* IPN_ICMPQUERY */ 178 #define NAT_SEARCH 0x0010 179 #define NAT_SLAVE 0x0020 /* Slave connection for a proxy */ 180 #define NAT_NOTRULEPORT 0x0040 /* Don't use the port # in the NAT rule */ 181 182 #define NAT_TCPUDP (NAT_TCP|NAT_UDP) 183 #define NAT_TCPUDPICMP (NAT_TCP|NAT_UDP|NAT_ICMPERR) 184 #define NAT_TCPUDPICMPQ (NAT_TCP|NAT_UDP|NAT_ICMPQUERY) 185 #define NAT_FROMRULE (NAT_TCP|NAT_UDP) 186 187 /* 0x0100 reserved for FI_W_SPORT */ 188 /* 0x0200 reserved for FI_W_DPORT */ 189 /* 0x0400 reserved for FI_W_SADDR */ 190 /* 0x0800 reserved for FI_W_DADDR */ 191 /* 0x1000 reserved for FI_W_NEWFR */ 192 /* 0x2000 reserved for SI_CLONE */ 193 /* 0x4000 reserved for SI_CLONED */ 194 /* 0x8000 reserved for SI_IGNOREPKT */ 195 196 #define NAT_DEBUG 0x800000 197 198 typedef struct nat_addr_s { 199 i6addr_t na_addr[2]; 200 i6addr_t na_nextaddr; 201 int na_atype; 202 int na_function; 203 } nat_addr_t; 204 205 #define na_nextip na_nextaddr.in4.s_addr 206 #define na_nextip6 na_nextaddr.in6 207 #define na_num na_addr[0].iplookupnum 208 #define na_type na_addr[0].iplookuptype 209 #define na_subtype na_addr[0].iplookupsubtype 210 #define na_ptr na_addr[1].iplookupptr 211 #define na_func na_addr[1].iplookupfunc 212 213 214 /* 215 * This structure represents an actual NAT rule, loaded by ipnat. 216 */ 217 typedef struct ipnat { 218 ipfmutex_t in_lock; 219 struct ipnat *in_next; /* NAT rule list next */ 220 struct ipnat **in_pnext; /* prior rdr next ptr */ 221 struct ipnat *in_rnext; /* rdr rule hash next */ 222 struct ipnat **in_prnext; /* prior rdr next ptr */ 223 struct ipnat *in_mnext; /* map rule hash next */ 224 struct ipnat **in_pmnext; /* prior map next ptr */ 225 struct ipftq *in_tqehead[2]; 226 void *in_ifps[2]; 227 void *in_apr; 228 char *in_comment; 229 mb_t *in_divmp; 230 void *in_pconf; 231 U_QUAD_T in_pkts[2]; 232 U_QUAD_T in_bytes[2]; 233 u_long in_space; 234 u_long in_hits; 235 int in_size; 236 int in_use; 237 u_int in_hv[2]; 238 int in_flineno; /* conf. file line number */ 239 int in_stepnext; 240 int in_dlocal; 241 u_short in_dpnext; 242 u_short in_spnext; 243 /* From here to the end is covered by IPN_CMPSIZ */ 244 u_char in_v[2]; /* 0 = old, 1 = new */ 245 u_32_t in_flags; 246 u_32_t in_mssclamp; /* if != 0 clamp MSS to this */ 247 u_int in_age[2]; 248 int in_redir; /* see below for values */ 249 int in_pr[2]; /* protocol. */ 250 nat_addr_t in_ndst; 251 nat_addr_t in_nsrc; 252 nat_addr_t in_osrc; 253 nat_addr_t in_odst; 254 frtuc_t in_tuc; 255 u_short in_ppip; /* ports per IP. */ 256 u_short in_ippip; /* IP #'s per IP# */ 257 u_short in_ndports[2]; 258 u_short in_nsports[2]; 259 int in_ifnames[2]; 260 int in_plabel; /* proxy label. */ 261 int in_pconfig; /* proxy label. */ 262 ipftag_t in_tag; 263 int in_namelen; 264 char in_names[1]; 265 } ipnat_t; 266 267 /* 268 * MAP-IN MAP-OUT RDR-IN RDR-OUT 269 * osrc X == src == src X 270 * odst X == dst == dst X 271 * nsrc == dst X X == dst 272 * ndst == src X X == src 273 */ 274 #define in_dpmin in_ndports[0] /* Also holds static redir port */ 275 #define in_dpmax in_ndports[1] 276 #define in_spmin in_nsports[0] /* Also holds static redir port */ 277 #define in_spmax in_nsports[1] 278 #define in_ndport in_ndports[0] 279 #define in_nsport in_nsports[0] 280 #define in_dipnext in_ndst.na_nextaddr.in4 281 #define in_dipnext6 in_ndst.na_nextaddr 282 #define in_dnip in_ndst.na_nextaddr.in4.s_addr 283 #define in_dnip6 in_ndst.na_nextaddr 284 #define in_sipnext in_nsrc.na_nextaddr.in4 285 #define in_snip in_nsrc.na_nextaddr.in4.s_addr 286 #define in_snip6 in_nsrc.na_nextaddr 287 #define in_odstip in_odst.na_addr[0].in4 288 #define in_odstip6 in_odst.na_addr[0] 289 #define in_odstaddr in_odst.na_addr[0].in4.s_addr 290 #define in_odstmsk in_odst.na_addr[1].in4.s_addr 291 #define in_odstmsk6 in_odst.na_addr[1] 292 #define in_odstatype in_odst.na_atype 293 #define in_osrcip in_osrc.na_addr[0].in4 294 #define in_osrcip6 in_osrc.na_addr[0] 295 #define in_osrcaddr in_osrc.na_addr[0].in4.s_addr 296 #define in_osrcmsk in_osrc.na_addr[1].in4.s_addr 297 #define in_osrcmsk6 in_osrc.na_addr[1] 298 #define in_osrcatype in_osrc.na_atype 299 #define in_ndstip in_ndst.na_addr[0].in4 300 #define in_ndstip6 in_ndst.na_addr[0] 301 #define in_ndstaddr in_ndst.na_addr[0].in4.s_addr 302 #define in_ndstmsk in_ndst.na_addr[1].in4.s_addr 303 #define in_ndstmsk6 in_ndst.na_addr[1] 304 #define in_ndstatype in_ndst.na_atype 305 #define in_ndstafunc in_ndst.na_function 306 #define in_nsrcip in_nsrc.na_addr[0].in4 307 #define in_nsrcip6 in_nsrc.na_addr[0] 308 #define in_nsrcaddr in_nsrc.na_addr[0].in4.s_addr 309 #define in_nsrcmsk in_nsrc.na_addr[1].in4.s_addr 310 #define in_nsrcmsk6 in_nsrc.na_addr[1] 311 #define in_nsrcatype in_nsrc.na_atype 312 #define in_nsrcafunc in_nsrc.na_function 313 #define in_scmp in_tuc.ftu_scmp 314 #define in_dcmp in_tuc.ftu_dcmp 315 #define in_stop in_tuc.ftu_stop 316 #define in_dtop in_tuc.ftu_dtop 317 #define in_osport in_tuc.ftu_sport 318 #define in_odport in_tuc.ftu_dport 319 #define in_ndstnum in_ndst.na_addr[0].iplookupnum 320 #define in_ndsttype in_ndst.na_addr[0].iplookuptype 321 #define in_ndstptr in_ndst.na_addr[1].iplookupptr 322 #define in_ndstfunc in_ndst.na_addr[1].iplookupfunc 323 #define in_nsrcnum in_nsrc.na_addr[0].iplookupnum 324 #define in_nsrctype in_nsrc.na_addr[0].iplookuptype 325 #define in_nsrcptr in_nsrc.na_addr[1].iplookupptr 326 #define in_nsrcfunc in_nsrc.na_addr[1].iplookupfunc 327 #define in_odstnum in_odst.na_addr[0].iplookupnum 328 #define in_odsttype in_odst.na_addr[0].iplookuptype 329 #define in_odstptr in_odst.na_addr[1].iplookupptr 330 #define in_odstfunc in_odst.na_addr[1].iplookupfunc 331 #define in_osrcnum in_osrc.na_addr[0].iplookupnum 332 #define in_osrctype in_osrc.na_addr[0].iplookuptype 333 #define in_osrcptr in_osrc.na_addr[1].iplookupptr 334 #define in_osrcfunc in_osrc.na_addr[1].iplookupfunc 335 #define in_icmpidmin in_nsports[0] 336 #define in_icmpidmax in_nsports[1] 337 338 /* 339 * Bit definitions for in_flags 340 */ 341 #define IPN_ANY 0x00000 342 #define IPN_TCP 0x00001 343 #define IPN_UDP 0x00002 344 #define IPN_TCPUDP (IPN_TCP|IPN_UDP) 345 #define IPN_ICMPERR 0x00004 346 #define IPN_TCPUDPICMP (IPN_TCP|IPN_UDP|IPN_ICMPERR) 347 #define IPN_ICMPQUERY 0x00008 348 #define IPN_TCPUDPICMPQ (IPN_TCP|IPN_UDP|IPN_ICMPQUERY) 349 #define IPN_RF (IPN_TCPUDP|IPN_DELETE|IPN_ICMPERR) 350 #define IPN_AUTOPORTMAP 0x00010 351 #define IPN_FILTER 0x00020 352 #define IPN_SPLIT 0x00040 353 #define IPN_ROUNDR 0x00080 354 #define IPN_SIPRANGE 0x00100 355 #define IPN_DIPRANGE 0x00200 356 #define IPN_NOTSRC 0x00400 357 #define IPN_NOTDST 0x00800 358 #define IPN_NO 0x01000 359 #define IPN_DYNSRCIP 0x02000 /* dynamic src IP# */ 360 #define IPN_DYNDSTIP 0x04000 /* dynamic dst IP# */ 361 #define IPN_DELETE 0x08000 362 #define IPN_STICKY 0x10000 363 #define IPN_FRAG 0x20000 364 #define IPN_FIXEDSPORT 0x40000 365 #define IPN_FIXEDDPORT 0x80000 366 #define IPN_FINDFORWARD 0x100000 367 #define IPN_IN 0x200000 368 #define IPN_SEQUENTIAL 0x400000 369 #define IPN_PURGE 0x800000 370 #define IPN_PROXYRULE 0x1000000 371 #define IPN_USERFLAGS (IPN_TCPUDP|IPN_AUTOPORTMAP|IPN_SIPRANGE|IPN_SPLIT|\ 372 IPN_ROUNDR|IPN_FILTER|IPN_NOTSRC|IPN_NOTDST|IPN_NO|\ 373 IPN_FRAG|IPN_STICKY|IPN_FIXEDDPORT|IPN_ICMPQUERY|\ 374 IPN_DIPRANGE|IPN_SEQUENTIAL|IPN_PURGE) 375 376 /* 377 * Values for in_redir 378 */ 379 #define NAT_MAP 0x01 380 #define NAT_REDIRECT 0x02 381 #define NAT_BIMAP (NAT_MAP|NAT_REDIRECT) 382 #define NAT_MAPBLK 0x04 383 #define NAT_REWRITE 0x08 384 #define NAT_ENCAP 0x10 385 #define NAT_DIVERTUDP 0x20 386 387 #define MAPBLK_MINPORT 1024 /* don't use reserved ports for src port */ 388 #define USABLE_PORTS (65536 - MAPBLK_MINPORT) 389 390 #define IPN_CMPSIZ (sizeof(ipnat_t) - offsetof(ipnat_t, in_v)) 391 392 typedef struct natlookup { 393 i6addr_t nl_inipaddr; 394 i6addr_t nl_outipaddr; 395 i6addr_t nl_realipaddr; 396 int nl_v; 397 int nl_flags; 398 u_short nl_inport; 399 u_short nl_outport; 400 u_short nl_realport; 401 } natlookup_t; 402 403 #define nl_inip nl_inipaddr.in4 404 #define nl_outip nl_outipaddr.in4 405 #define nl_realip nl_realipaddr.in4 406 #define nl_inip6 nl_inipaddr.in6 407 #define nl_outip6 nl_outipaddr.in6 408 #define nl_realip6 nl_realipaddr.in6 409 410 411 typedef struct nat_save { 412 void *ipn_next; 413 struct nat ipn_nat; 414 struct ipnat ipn_ipnat; 415 struct frentry ipn_fr; 416 int ipn_dsize; 417 char ipn_data[4]; 418 } nat_save_t; 419 420 #define ipn_rule ipn_nat.nat_fr 421 422 typedef struct natget { 423 void *ng_ptr; 424 int ng_sz; 425 } natget_t; 426 427 428 /* 429 * This structure gets used to help NAT sessions keep the same NAT rule (and 430 * thus translation for IP address) when: 431 * (a) round-robin redirects are in use 432 * (b) different IP add 433 */ 434 typedef struct hostmap { 435 struct hostmap *hm_hnext; 436 struct hostmap **hm_phnext; 437 struct hostmap *hm_next; 438 struct hostmap **hm_pnext; 439 struct ipnat *hm_ipnat; 440 i6addr_t hm_osrcip6; 441 i6addr_t hm_odstip6; 442 i6addr_t hm_nsrcip6; 443 i6addr_t hm_ndstip6; 444 u_32_t hm_port; 445 int hm_ref; 446 int hm_hv; 447 int hm_v; 448 } hostmap_t; 449 450 #define hm_osrcip hm_osrcip6.in4 451 #define hm_odstip hm_odstip6.in4 452 #define hm_nsrcip hm_nsrcip6.in4 453 #define hm_ndstip hm_ndstip6.in4 454 #define hm_osrc6 hm_osrcip6.in6 455 #define hm_odst6 hm_odstip6.in6 456 #define hm_nsrc6 hm_nsrcip6.in6 457 #define hm_ndst6 hm_ndstip6.in6 458 459 460 /* 461 * Structure used to pass information in to nat_newmap and nat_newrdr. 462 */ 463 typedef struct natinfo { 464 ipnat_t *nai_np; 465 u_32_t nai_sum1; 466 u_32_t nai_sum2; 467 struct in_addr nai_ip; /* In host byte order */ 468 u_short nai_port; 469 u_short nai_nport; 470 u_short nai_sport; 471 u_short nai_dport; 472 } natinfo_t; 473 474 475 typedef struct nat_stat_side { 476 u_int *ns_bucketlen; 477 nat_t **ns_table; 478 u_long ns_added; 479 u_long ns_appr_fail; 480 u_long ns_badnat; 481 u_long ns_badnatnew; 482 u_long ns_badnextaddr; 483 u_long ns_bucket_max; 484 u_long ns_clone_nomem; 485 u_long ns_decap_bad; 486 u_long ns_decap_fail; 487 u_long ns_decap_pullup; 488 u_long ns_divert_dup; 489 u_long ns_divert_exist; 490 u_long ns_drop; 491 u_long ns_encap_dup; 492 u_long ns_encap_pullup; 493 u_long ns_exhausted; 494 u_long ns_icmp_address; 495 u_long ns_icmp_basic; 496 u_long ns_icmp_mbuf; 497 u_long ns_icmp_notfound; 498 u_long ns_icmp_rebuild; 499 u_long ns_icmp_short; 500 u_long ns_icmp_size; 501 u_long ns_ifpaddrfail; 502 u_long ns_ignored; 503 u_long ns_insert_fail; 504 u_long ns_inuse; 505 u_long ns_log; 506 u_long ns_lookup_miss; 507 u_long ns_lookup_nowild; 508 u_long ns_new_ifpaddr; 509 u_long ns_memfail; 510 u_long ns_table_max; 511 u_long ns_translated; 512 u_long ns_unfinalised; 513 u_long ns_wrap; 514 u_long ns_xlate_null; 515 u_long ns_xlate_exists; 516 u_long ns_ipf_proxy_fail; 517 u_long ns_uncreate[2]; 518 } nat_stat_side_t; 519 520 521 typedef struct natstat { 522 nat_t *ns_instances; 523 ipnat_t *ns_list; 524 hostmap_t *ns_maplist; 525 hostmap_t **ns_maptable; 526 u_int ns_active; 527 u_long ns_addtrpnt; 528 u_long ns_divert_build; 529 u_long ns_expire; 530 u_long ns_flush_all; 531 u_long ns_flush_closing; 532 u_long ns_flush_queue; 533 u_long ns_flush_state; 534 u_long ns_flush_timeout; 535 u_long ns_hm_new; 536 u_long ns_hm_newfail; 537 u_long ns_hm_addref; 538 u_long ns_hm_nullnp; 539 u_long ns_log_ok; 540 u_long ns_log_fail; 541 u_int ns_hostmap_sz; 542 u_int ns_nattab_sz; 543 u_int ns_nattab_max; 544 u_int ns_orphans; 545 u_int ns_rules; 546 u_int ns_rules_map; 547 u_int ns_rules_rdr; 548 u_int ns_rultab_sz; 549 u_int ns_rdrtab_sz; 550 u_32_t ns_ticks; 551 u_int ns_trpntab_sz; 552 u_int ns_wilds; 553 u_long ns_proto[256]; 554 nat_stat_side_t ns_side[2]; 555 #ifdef USE_INET6 556 nat_stat_side_t ns_side6[2]; 557 #endif 558 } natstat_t; 559 560 typedef struct natlog { 561 i6addr_t nl_osrcip; 562 i6addr_t nl_odstip; 563 i6addr_t nl_nsrcip; 564 i6addr_t nl_ndstip; 565 u_short nl_osrcport; 566 u_short nl_odstport; 567 u_short nl_nsrcport; 568 u_short nl_ndstport; 569 int nl_action; 570 int nl_type; 571 int nl_rule; 572 U_QUAD_T nl_pkts[2]; 573 U_QUAD_T nl_bytes[2]; 574 u_char nl_p[2]; 575 u_char nl_v[2]; 576 u_char nl_ifnames[2][LIFNAMSIZ]; 577 } natlog_t; 578 579 580 #define NL_NEW 0 581 #define NL_CLONE 1 582 #define NL_PURGE 0xfffc 583 #define NL_DESTROY 0xfffd 584 #define NL_FLUSH 0xfffe 585 #define NL_EXPIRE 0xffff 586 587 #define NAT_HASH_FN(_k,_l,_m) (((_k) + ((_k) >> 12) + _l) % (_m)) 588 #define NAT_HASH_FN6(_k,_l,_m) ((((u_32_t *)(_k))[3] \ 589 + (((u_32_t *)(_k))[3] >> 12) \ 590 + (((u_32_t *)(_k))[2]) \ 591 + (((u_32_t *)(_k))[2] >> 12) \ 592 + (((u_32_t *)(_k))[1]) \ 593 + (((u_32_t *)(_k))[1] >> 12) \ 594 + (((u_32_t *)(_k))[0]) \ 595 + (((u_32_t *)(_k))[0] >> 12) \ 596 + _l) % (_m)) 597 598 #define LONG_SUM(_i) (((_i) & 0xffff) + ((_i) >> 16)) 599 #define LONG_SUM6(_i) (LONG_SUM(ntohl(((u_32_t *)(_i))[0])) + \ 600 LONG_SUM(ntohl(((u_32_t *)(_i))[1])) + \ 601 LONG_SUM(ntohl(((u_32_t *)(_i))[2])) + \ 602 LONG_SUM(ntohl(((u_32_t *)(_i))[3]))) 603 604 #define CALC_SUMD(s1, s2, sd) { \ 605 (s1) = ((s1) & 0xffff) + ((s1) >> 16); \ 606 (s2) = ((s2) & 0xffff) + ((s2) >> 16); \ 607 /* Do it twice */ \ 608 (s1) = ((s1) & 0xffff) + ((s1) >> 16); \ 609 (s2) = ((s2) & 0xffff) + ((s2) >> 16); \ 610 /* Because ~1 == -2, We really need ~1 == -1 */ \ 611 if ((s1) > (s2)) (s2)--; \ 612 (sd) = (s2) - (s1); \ 613 (sd) = ((sd) & 0xffff) + ((sd) >> 16); } 614 615 #define NAT_SYSSPACE 0x80000000 616 #define NAT_LOCKHELD 0x40000000 617 618 /* 619 * This is present in ip_nat.h because it needs to be shared between 620 * ip_nat.c and ip_nat6.c 621 */ 622 typedef struct ipf_nat_softc_s { 623 ipfmutex_t ipf_nat_new; 624 ipfmutex_t ipf_nat_io; 625 int ipf_nat_doflush; 626 int ipf_nat_logging; 627 int ipf_nat_lock; 628 int ipf_nat_inited; 629 int ipf_nat_table_wm_high; 630 int ipf_nat_table_wm_low; 631 u_int ipf_nat_table_max; 632 u_int ipf_nat_table_sz; 633 u_int ipf_nat_maprules_sz; 634 u_int ipf_nat_rdrrules_sz; 635 u_int ipf_nat_hostmap_sz; 636 u_int ipf_nat_maxbucket; 637 u_int ipf_nat_last_force_flush; 638 u_int ipf_nat_defage; 639 u_int ipf_nat_defipage; 640 u_int ipf_nat_deficmpage; 641 ipf_v4_masktab_t ipf_nat_map_mask; 642 ipf_v6_masktab_t ipf_nat6_map_mask; 643 ipf_v4_masktab_t ipf_nat_rdr_mask; 644 ipf_v6_masktab_t ipf_nat6_rdr_mask; 645 nat_t **ipf_nat_table[2]; 646 nat_t *ipf_nat_instances; 647 ipnat_t *ipf_nat_list; 648 ipnat_t **ipf_nat_list_tail; 649 ipnat_t **ipf_nat_map_rules; 650 ipnat_t **ipf_nat_rdr_rules; 651 ipftq_t *ipf_nat_utqe; 652 hostmap_t **ipf_hm_maptable ; 653 hostmap_t *ipf_hm_maplist ; 654 ipftuneable_t *ipf_nat_tune; 655 ipftq_t ipf_nat_udptq; 656 ipftq_t ipf_nat_udpacktq; 657 ipftq_t ipf_nat_icmptq; 658 ipftq_t ipf_nat_icmpacktq; 659 ipftq_t ipf_nat_iptq; 660 ipftq_t ipf_nat_pending; 661 ipftq_t ipf_nat_tcptq[IPF_TCP_NSTATES]; 662 natstat_t ipf_nat_stats; 663 } ipf_nat_softc_t ; 664 665 #define ipf_nat_map_max ipf_nat_map_mask.imt4_max 666 #define ipf_nat_rdr_max ipf_nat_rdr_mask.imt4_max 667 #define ipf_nat6_map_max ipf_nat6_map_mask.imt6_max 668 #define ipf_nat6_rdr_max ipf_nat6_rdr_mask.imt6_max 669 #define ipf_nat_map_active_masks ipf_nat_map_mask.imt4_active 670 #define ipf_nat_rdr_active_masks ipf_nat_rdr_mask.imt4_active 671 #define ipf_nat6_map_active_masks ipf_nat6_map_mask.imt6_active 672 #define ipf_nat6_rdr_active_masks ipf_nat6_rdr_mask.imt6_active 673 674 extern frentry_t ipfnatblock; 675 676 extern void ipf_fix_datacksum(u_short *, u_32_t); 677 extern void ipf_fix_incksum(int, u_short *, u_32_t, u_32_t); 678 extern void ipf_fix_outcksum(int, u_short *, u_32_t, u_32_t); 679 680 extern int ipf_nat_checkin(fr_info_t *, u_32_t *); 681 extern int ipf_nat_checkout(fr_info_t *, u_32_t *); 682 extern void ipf_nat_delete(ipf_main_softc_t *, struct nat *, int); 683 extern void ipf_nat_deref(ipf_main_softc_t *, nat_t **); 684 extern void ipf_nat_expire(ipf_main_softc_t *); 685 extern int ipf_nat_hashtab_add(ipf_main_softc_t *, 686 ipf_nat_softc_t *, nat_t *); 687 extern void ipf_nat_hostmapdel(ipf_main_softc_t *, hostmap_t **); 688 extern int ipf_nat_hostmap_rehash(ipf_main_softc_t *, 689 ipftuneable_t *, ipftuneval_t *); 690 extern nat_t *ipf_nat_icmperrorlookup(fr_info_t *, int); 691 extern nat_t *ipf_nat_icmperror(fr_info_t *, u_int *, int); 692 #if defined(__OpenBSD__) 693 extern void ipf_nat_ifdetach(void *); 694 #endif 695 extern int ipf_nat_init(void); 696 extern nat_t *ipf_nat_inlookup(fr_info_t *, u_int, u_int, 697 struct in_addr, struct in_addr); 698 extern int ipf_nat_in(fr_info_t *, nat_t *, int, u_32_t); 699 extern int ipf_nat_insert(ipf_main_softc_t *, ipf_nat_softc_t *, 700 nat_t *); 701 extern int ipf_nat_ioctl(ipf_main_softc_t *, void *, ioctlcmd_t, 702 int, int, void *); 703 extern void ipf_nat_log(ipf_main_softc_t *, ipf_nat_softc_t *, 704 struct nat *, u_int); 705 extern nat_t *ipf_nat_lookupredir(natlookup_t *); 706 extern nat_t *ipf_nat_maplookup(void *, u_int, struct in_addr, 707 struct in_addr); 708 extern nat_t *ipf_nat_add(fr_info_t *, ipnat_t *, nat_t **, 709 u_int, int); 710 extern int ipf_nat_out(fr_info_t *, nat_t *, int, u_32_t); 711 extern nat_t *ipf_nat_outlookup(fr_info_t *, u_int, u_int, 712 struct in_addr, struct in_addr); 713 extern u_short *ipf_nat_proto(fr_info_t *, nat_t *, u_int); 714 extern void ipf_nat_rule_deref(ipf_main_softc_t *, ipnat_t **); 715 extern void ipf_nat_setqueue(ipf_main_softc_t *, ipf_nat_softc_t *, 716 nat_t *); 717 extern void ipf_nat_setpending(ipf_main_softc_t *, nat_t *); 718 extern nat_t *ipf_nat_tnlookup(fr_info_t *, int); 719 extern void ipf_nat_update(fr_info_t *, nat_t *); 720 extern frentry_t *ipf_nat_ipfin(fr_info_t *, u_32_t *); 721 extern frentry_t *ipf_nat_ipfout(fr_info_t *, u_32_t *); 722 extern int ipf_nat_in(fr_info_t *, nat_t *, int, u_32_t); 723 extern int ipf_nat_out(fr_info_t *, nat_t *, int, u_32_t); 724 extern int ipf_nat_rehash(ipf_main_softc_t *, ipftuneable_t *, 725 ipftuneval_t *); 726 extern int ipf_nat_rehash_rules(ipf_main_softc_t *, ipftuneable_t *, 727 ipftuneval_t *); 728 extern int ipf_nat_settimeout(struct ipf_main_softc_s *, 729 ipftuneable_t *, ipftuneval_t *); 730 extern void ipf_nat_sync(ipf_main_softc_t *, void *); 731 732 extern nat_t *ipf_nat_clone(fr_info_t *, nat_t *); 733 extern void ipf_nat_delmap(ipf_nat_softc_t *, ipnat_t *); 734 extern void ipf_nat_delrdr(ipf_nat_softc_t *, ipnat_t *); 735 extern int ipf_nat_wildok(nat_t *, int, int, int, int); 736 extern void ipf_nat_setlock(void *, int); 737 extern void ipf_nat_load(void); 738 extern void *ipf_nat_soft_create(ipf_main_softc_t *); 739 extern int ipf_nat_soft_init(ipf_main_softc_t *, void *); 740 extern void ipf_nat_soft_destroy(ipf_main_softc_t *, void *); 741 extern int ipf_nat_soft_fini(ipf_main_softc_t *, void *); 742 extern int ipf_nat_main_load(void); 743 extern int ipf_nat_main_unload(void); 744 extern ipftq_t *ipf_nat_add_tq(ipf_main_softc_t *, int); 745 extern void ipf_nat_uncreate(fr_info_t *); 746 747 #ifdef USE_INET6 748 extern nat_t *ipf_nat6_add(fr_info_t *, ipnat_t *, nat_t **, 749 u_int, int); 750 extern void ipf_nat6_addrdr(ipf_nat_softc_t *, ipnat_t *); 751 extern void ipf_nat6_addmap(ipf_nat_softc_t *, ipnat_t *); 752 extern int ipf_nat6_checkout(fr_info_t *, u_32_t *); 753 extern int ipf_nat6_checkin(fr_info_t *, u_32_t *); 754 extern void ipf_nat6_delmap(ipf_nat_softc_t *, ipnat_t *); 755 extern void ipf_nat6_delrdr(ipf_nat_softc_t *, ipnat_t *); 756 extern int ipf_nat6_finalise(fr_info_t *, nat_t *); 757 extern nat_t *ipf_nat6_icmperror(fr_info_t *, u_int *, int); 758 extern nat_t *ipf_nat6_icmperrorlookup(fr_info_t *, int); 759 extern nat_t *ipf_nat6_inlookup(fr_info_t *, u_int, u_int, 760 struct in6_addr *, struct in6_addr *); 761 extern u_32_t ipf_nat6_ip6subtract(i6addr_t *, i6addr_t *); 762 extern frentry_t *ipf_nat6_ipfin(fr_info_t *, u_32_t *); 763 extern frentry_t *ipf_nat6_ipfout(fr_info_t *, u_32_t *); 764 extern nat_t *ipf_nat6_lookupredir(natlookup_t *); 765 extern int ipf_nat6_newmap(fr_info_t *, nat_t *, natinfo_t *); 766 extern int ipf_nat6_newrdr(fr_info_t *, nat_t *, natinfo_t *); 767 extern nat_t *ipf_nat6_outlookup(fr_info_t *, u_int, u_int, 768 struct in6_addr *, struct in6_addr *); 769 extern int ipf_nat6_newrewrite(fr_info_t *, nat_t *, natinfo_t *); 770 extern int ipf_nat6_newdivert(fr_info_t *, nat_t *, natinfo_t *); 771 extern int ipf_nat6_ruleaddrinit(ipf_main_softc_t *, ipf_nat_softc_t *, ipnat_t *); 772 773 #endif 774 775 776 #endif /* __IP_NAT_H__ */ 777
Indexes created Mon Sep 29 21:09:56 GMT 2025