ip_nat.h revision 1.2
1 /* $NetBSD: ip_nat.h,v 1.2 2012/03/23 20:39:50 christos Exp $ */ 2 3 /* 4 * Copyright (C) 2011 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 2.143.2.3 2012/01/29 03:08:31 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 #else 25 #define SIOCADNAT _IOW(r, 60, struct ipfobj) 26 #define SIOCRMNAT _IOW(r, 61, struct ipfobj) 27 #define SIOCGNATS _IOWR(r, 62, struct ipfobj) 28 #define SIOCGNATL _IOWR(r, 63, struct ipfobj) 29 #endif 30 31 #undef LARGE_NAT /* define this if you're setting up a system to NAT 32 * LARGE numbers of networks/hosts - i.e. in the 33 * hundreds or thousands. In such a case, you should 34 * also change the RDR_SIZE and NAT_SIZE below to more 35 * appropriate sizes. The figures below were used for 36 * a setup with 1000-2000 networks to NAT. 37 */ 38 #ifndef NAT_SIZE 39 # ifdef LARGE_NAT 40 # define NAT_SIZE 2047 41 # else 42 # define NAT_SIZE 127 43 # endif 44 #endif 45 #ifndef RDR_SIZE 46 # ifdef LARGE_NAT 47 # define RDR_SIZE 2047 48 # else 49 # define RDR_SIZE 127 50 # endif 51 #endif 52 #ifndef HOSTMAP_SIZE 53 # ifdef LARGE_NAT 54 # define HOSTMAP_SIZE 8191 55 # else 56 # define HOSTMAP_SIZE 2047 57 # endif 58 #endif 59 #ifndef NAT_TABLE_MAX 60 /* 61 * This is newly introduced and for the sake of "least surprise", the numbers 62 * present aren't what we'd normally use for creating a proper hash table. 63 */ 64 # ifdef LARGE_NAT 65 # define NAT_TABLE_MAX 180000 66 # else 67 # define NAT_TABLE_MAX 30000 68 # endif 69 #endif 70 #ifndef NAT_TABLE_SZ 71 # ifdef LARGE_NAT 72 # define NAT_TABLE_SZ 16383 73 # else 74 # define NAT_TABLE_SZ 2047 75 # endif 76 #endif 77 #ifndef APR_LABELLEN 78 #define APR_LABELLEN 16 79 #endif 80 #define NAT_HW_CKSUM 0x80000000 81 82 #define DEF_NAT_AGE 1200 /* 10 minutes (600 seconds) */ 83 84 struct ipstate; 85 struct ap_session; 86 87 /* 88 * This structure is used in the active NAT table and represents an 89 * active NAT session. 90 */ 91 typedef 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 194 195 typedef 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 */ 214 typedef 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_long in_space; 229 u_long in_hits; 230 int in_size; 231 u_int in_use; 232 u_int in_hv[2]; 233 int in_flineno; /* conf. file line number */ 234 int in_stepnext; 235 int in_dlocal; 236 u_short in_dpnext; 237 u_short in_spnext; 238 /* From here to the end is covered by IPN_CMPSIZ */ 239 u_char in_v[2]; /* 0 = old, 1 = new */ 240 u_32_t in_flags; 241 u_32_t in_mssclamp; /* if != 0 clamp MSS to this */ 242 u_int in_age[2]; 243 int in_redir; /* see below for values */ 244 int in_pr[2]; /* protocol. */ 245 nat_addr_t in_ndst; 246 nat_addr_t in_nsrc; 247 nat_addr_t in_osrc; 248 nat_addr_t in_odst; 249 frtuc_t in_tuc; 250 u_short in_ppip; /* ports per IP. */ 251 u_short in_ippip; /* IP #'s per IP# */ 252 u_short in_ndports[2]; 253 u_short in_nsports[2]; 254 int in_ifnames[2]; 255 int in_plabel; /* proxy label. */ 256 int in_pconfig; /* proxy label. */ 257 ipftag_t in_tag; 258 int in_limit; 259 U_QUAD_T in_pkts[2]; 260 U_QUAD_T in_bytes[2]; 261 int in_namelen; 262 char in_names[1]; 263 } ipnat_t; 264 265 /* 266 * MAP-IN MAP-OUT RDR-IN RDR-OUT 267 * osrc X == src == src X 268 * odst X == dst == dst X 269 * nsrc == dst X X == dst 270 * ndst == src X X == src 271 */ 272 #define in_dpmin in_ndports[0] /* Also holds static redir port */ 273 #define in_dpmax in_ndports[1] 274 #define in_spmin in_nsports[0] /* Also holds static redir port */ 275 #define in_spmax in_nsports[1] 276 #define in_ndport in_ndports[0] 277 #define in_nsport in_nsports[0] 278 #define in_dipnext in_ndst.na_nextaddr.in4 279 #define in_dipnext6 in_ndst.na_nextaddr 280 #define in_dnip in_ndst.na_nextaddr.in4.s_addr 281 #define in_dnip6 in_ndst.na_nextaddr 282 #define in_sipnext in_nsrc.na_nextaddr.in4 283 #define in_snip in_nsrc.na_nextaddr.in4.s_addr 284 #define in_snip6 in_nsrc.na_nextaddr 285 #define in_odstip in_odst.na_addr[0].in4 286 #define in_odstip6 in_odst.na_addr[0] 287 #define in_odstaddr in_odst.na_addr[0].in4.s_addr 288 #define in_odstmsk in_odst.na_addr[1].in4.s_addr 289 #define in_odstmsk6 in_odst.na_addr[1] 290 #define in_odstatype in_odst.na_atype 291 #define in_osrcip in_osrc.na_addr[0].in4 292 #define in_osrcip6 in_osrc.na_addr[0] 293 #define in_osrcaddr in_osrc.na_addr[0].in4.s_addr 294 #define in_osrcmsk in_osrc.na_addr[1].in4.s_addr 295 #define in_osrcmsk6 in_osrc.na_addr[1] 296 #define in_osrcatype in_osrc.na_atype 297 #define in_ndstip in_ndst.na_addr[0].in4 298 #define in_ndstip6 in_ndst.na_addr[0] 299 #define in_ndstaddr in_ndst.na_addr[0].in4.s_addr 300 #define in_ndstmsk in_ndst.na_addr[1].in4.s_addr 301 #define in_ndstmsk6 in_ndst.na_addr[1] 302 #define in_ndstatype in_ndst.na_atype 303 #define in_ndstafunc in_ndst.na_function 304 #define in_nsrcip in_nsrc.na_addr[0].in4 305 #define in_nsrcip6 in_nsrc.na_addr[0] 306 #define in_nsrcaddr in_nsrc.na_addr[0].in4.s_addr 307 #define in_nsrcmsk in_nsrc.na_addr[1].in4.s_addr 308 #define in_nsrcmsk6 in_nsrc.na_addr[1] 309 #define in_nsrcatype in_nsrc.na_atype 310 #define in_nsrcafunc in_nsrc.na_function 311 #define in_scmp in_tuc.ftu_scmp 312 #define in_dcmp in_tuc.ftu_dcmp 313 #define in_stop in_tuc.ftu_stop 314 #define in_dtop in_tuc.ftu_dtop 315 #define in_osport in_tuc.ftu_sport 316 #define in_odport in_tuc.ftu_dport 317 #define in_ndstnum in_ndst.na_addr[0].iplookupnum 318 #define in_ndsttype in_ndst.na_addr[0].iplookuptype 319 #define in_ndstptr in_ndst.na_addr[1].iplookupptr 320 #define in_ndstfunc in_ndst.na_addr[1].iplookupfunc 321 #define in_nsrcnum in_nsrc.na_addr[0].iplookupnum 322 #define in_nsrctype in_nsrc.na_addr[0].iplookuptype 323 #define in_nsrcptr in_nsrc.na_addr[1].iplookupptr 324 #define in_nsrcfunc in_nsrc.na_addr[1].iplookupfunc 325 #define in_odstnum in_odst.na_addr[0].iplookupnum 326 #define in_odsttype in_odst.na_addr[0].iplookuptype 327 #define in_odstptr in_odst.na_addr[1].iplookupptr 328 #define in_odstfunc in_odst.na_addr[1].iplookupfunc 329 #define in_osrcnum in_osrc.na_addr[0].iplookupnum 330 #define in_osrctype in_osrc.na_addr[0].iplookuptype 331 #define in_osrcptr in_osrc.na_addr[1].iplookupptr 332 #define in_osrcfunc in_osrc.na_addr[1].iplookupfunc 333 #define in_icmpidmin in_nsports[0] 334 #define in_icmpidmax in_nsports[1] 335 336 /* 337 * Bit definitions for in_flags 338 */ 339 #define IPN_ANY 0x00000 340 #define IPN_TCP 0x00001 341 #define IPN_UDP 0x00002 342 #define IPN_TCPUDP (IPN_TCP|IPN_UDP) 343 #define IPN_ICMPERR 0x00004 344 #define IPN_TCPUDPICMP (IPN_TCP|IPN_UDP|IPN_ICMPERR) 345 #define IPN_ICMPQUERY 0x00008 346 #define IPN_TCPUDPICMPQ (IPN_TCP|IPN_UDP|IPN_ICMPQUERY) 347 #define IPN_RF (IPN_TCPUDP|IPN_DELETE|IPN_ICMPERR) 348 #define IPN_AUTOPORTMAP 0x00010 349 #define IPN_FILTER 0x00020 350 #define IPN_SPLIT 0x00040 351 #define IPN_ROUNDR 0x00080 352 #define IPN_SIPRANGE 0x00100 353 #define IPN_DIPRANGE 0x00200 354 #define IPN_NOTSRC 0x00400 355 #define IPN_NOTDST 0x00800 356 #define IPN_NO 0x01000 357 #define IPN_DYNSRCIP 0x02000 /* dynamic src IP# */ 358 #define IPN_DYNDSTIP 0x04000 /* dynamic dst IP# */ 359 #define IPN_DELETE 0x08000 360 #define IPN_STICKY 0x10000 361 #define IPN_FRAG 0x20000 362 #define IPN_FIXEDSPORT 0x40000 363 #define IPN_FIXEDDPORT 0x80000 364 #define IPN_FINDFORWARD 0x100000 365 #define IPN_IN 0x200000 366 #define IPN_SEQUENTIAL 0x400000 367 #define IPN_USERFLAGS (IPN_TCPUDP|IPN_AUTOPORTMAP|IPN_SIPRANGE|IPN_SPLIT|\ 368 IPN_ROUNDR|IPN_FILTER|IPN_NOTSRC|IPN_NOTDST|IPN_NO|\ 369 IPN_FRAG|IPN_STICKY|IPN_FIXEDDPORT|IPN_ICMPQUERY|\ 370 IPN_DIPRANGE|IPN_SEQUENTIAL) 371 372 /* 373 * Values for in_redir 374 */ 375 #define NAT_MAP 0x01 376 #define NAT_REDIRECT 0x02 377 #define NAT_BIMAP (NAT_MAP|NAT_REDIRECT) 378 #define NAT_MAPBLK 0x04 379 #define NAT_REWRITE 0x08 380 #define NAT_ENCAP 0x10 381 #define NAT_DIVERTUDP 0x20 382 383 #define MAPBLK_MINPORT 1024 /* don't use reserved ports for src port */ 384 #define USABLE_PORTS (65536 - MAPBLK_MINPORT) 385 386 #define IPN_CMPSIZ (sizeof(ipnat_t) - offsetof(ipnat_t, in_v)) 387 388 typedef struct natlookup { 389 i6addr_t nl_inipaddr; 390 i6addr_t nl_outipaddr; 391 i6addr_t nl_realipaddr; 392 int nl_v; 393 int nl_flags; 394 u_short nl_inport; 395 u_short nl_outport; 396 u_short nl_realport; 397 } natlookup_t; 398 399 #define nl_inip nl_inipaddr.in4 400 #define nl_outip nl_outipaddr.in4 401 #define nl_realip nl_realipaddr.in4 402 #define nl_inip6 nl_inipaddr.in6 403 #define nl_outip6 nl_outipaddr.in6 404 #define nl_realip6 nl_realipaddr.in6 405 406 407 typedef struct nat_save { 408 void *ipn_next; 409 struct nat ipn_nat; 410 struct ipnat ipn_ipnat; 411 struct frentry ipn_fr; 412 int ipn_dsize; 413 char ipn_data[4]; 414 } nat_save_t; 415 416 #define ipn_rule ipn_nat.nat_fr 417 418 typedef struct natget { 419 void *ng_ptr; 420 int ng_sz; 421 } natget_t; 422 423 424 /* 425 * This structure gets used to help NAT sessions keep the same NAT rule (and 426 * thus translation for IP address) when: 427 * (a) round-robin redirects are in use 428 * (b) different IP add 429 */ 430 typedef struct hostmap { 431 struct hostmap *hm_hnext; 432 struct hostmap **hm_phnext; 433 struct hostmap *hm_next; 434 struct hostmap **hm_pnext; 435 struct ipnat *hm_ipnat; 436 i6addr_t hm_osrcip6; 437 i6addr_t hm_odstip6; 438 i6addr_t hm_nsrcip6; 439 i6addr_t hm_ndstip6; 440 u_32_t hm_port; 441 int hm_ref; 442 int hm_hv; 443 int hm_v; 444 } hostmap_t; 445 446 #define hm_osrcip hm_osrcip6.in4 447 #define hm_odstip hm_odstip6.in4 448 #define hm_nsrcip hm_nsrcip6.in4 449 #define hm_ndstip hm_ndstip6.in4 450 #define hm_osrc6 hm_osrcip6.in6 451 #define hm_odst6 hm_odstip6.in6 452 #define hm_nsrc6 hm_nsrcip6.in6 453 #define hm_ndst6 hm_ndstip6.in6 454 455 456 /* 457 * Structure used to pass information in to nat_newmap and nat_newrdr. 458 */ 459 typedef struct natinfo { 460 ipnat_t *nai_np; 461 u_32_t nai_sum1; 462 u_32_t nai_sum2; 463 struct in_addr nai_ip; /* In host byte order */ 464 u_short nai_port; 465 u_short nai_nport; 466 u_short nai_sport; 467 u_short nai_dport; 468 } natinfo_t; 469 470 471 typedef struct nat_stat_side { 472 u_int *ns_bucketlen; 473 nat_t **ns_table; 474 u_long ns_added; 475 u_long ns_appr_fail; 476 u_long ns_badnat; 477 u_long ns_badnatnew; 478 u_long ns_badnextaddr; 479 u_long ns_bucket_max; 480 u_long ns_clone_nomem; 481 u_long ns_decap_bad; 482 u_long ns_decap_fail; 483 u_long ns_decap_pullup; 484 u_long ns_divert_dup; 485 u_long ns_divert_exist; 486 u_long ns_drop; 487 u_long ns_encap_dup; 488 u_long ns_encap_pullup; 489 u_long ns_exhausted; 490 u_long ns_icmp_address; 491 u_long ns_icmp_basic; 492 u_long ns_icmp_mbuf; 493 u_long ns_icmp_notfound; 494 u_long ns_icmp_rebuild; 495 u_long ns_icmp_short; 496 u_long ns_icmp_size; 497 u_long ns_ifpaddrfail; 498 u_long ns_ignored; 499 u_long ns_insert_fail; 500 u_long ns_inuse; 501 u_long ns_log; 502 u_long ns_lookup_miss; 503 u_long ns_lookup_nowild; 504 u_long ns_new_ifpaddr; 505 u_long ns_memfail; 506 u_long ns_table_max; 507 u_long ns_translated; 508 u_long ns_unfinalised; 509 u_long ns_wrap; 510 u_long ns_xlate_null; 511 u_long ns_xlate_exists; 512 u_long ns_ipf_proxy_fail; 513 u_long ns_uncreate[2]; 514 } nat_stat_side_t; 515 516 517 typedef struct natstat { 518 nat_t *ns_instances; 519 ipnat_t *ns_list; 520 hostmap_t *ns_maplist; 521 hostmap_t **ns_maptable; 522 u_int ns_active; 523 u_long ns_addtrpnt; 524 u_long ns_divert_build; 525 u_long ns_expire; 526 u_long ns_flush_all; 527 u_long ns_flush_closing; 528 u_long ns_flush_queue; 529 u_long ns_flush_state; 530 u_long ns_flush_timeout; 531 u_long ns_hm_new; 532 u_long ns_hm_newfail; 533 u_long ns_hm_addref; 534 u_long ns_hm_nullnp; 535 u_long ns_log_ok; 536 u_long ns_log_fail; 537 u_int ns_hostmap_sz; 538 u_int ns_nattab_sz; 539 u_int ns_nattab_max; 540 u_int ns_orphans; 541 u_int ns_rules; 542 u_int ns_rules_map; 543 u_int ns_rules_rdr; 544 u_int ns_rultab_sz; 545 u_int ns_rdrtab_sz; 546 u_32_t ns_ticks; 547 u_int ns_trpntab_sz; 548 u_int ns_wilds; 549 u_long ns_proto[256]; 550 nat_stat_side_t ns_side[2]; 551 #ifdef USE_INET6 552 nat_stat_side_t ns_side6[2]; 553 #endif 554 } natstat_t; 555 556 typedef struct natlog { 557 i6addr_t nl_osrcip; 558 i6addr_t nl_odstip; 559 i6addr_t nl_nsrcip; 560 i6addr_t nl_ndstip; 561 u_short nl_osrcport; 562 u_short nl_odstport; 563 u_short nl_nsrcport; 564 u_short nl_ndstport; 565 int nl_action; 566 int nl_type; 567 int nl_rule; 568 U_QUAD_T nl_pkts[2]; 569 U_QUAD_T nl_bytes[2]; 570 u_char nl_p[2]; 571 u_char nl_v[2]; 572 u_char nl_ifnames[2][LIFNAMSIZ]; 573 } natlog_t; 574 575 576 #define NL_NEW 0 577 #define NL_CLONE 1 578 #define NL_DESTROY 0xfffd 579 #define NL_FLUSH 0xfffe 580 #define NL_EXPIRE 0xffff 581 582 #define NAT_HASH_FN(_k,_l,_m) (((_k) + ((_k) >> 12) + _l) % (_m)) 583 #define NAT_HASH_FN6(_k,_l,_m) ((((u_32_t *)(_k))[3] \ 584 + (((u_32_t *)(_k))[3] >> 12) \ 585 + (((u_32_t *)(_k))[2]) \ 586 + (((u_32_t *)(_k))[2] >> 12) \ 587 + (((u_32_t *)(_k))[1]) \ 588 + (((u_32_t *)(_k))[1] >> 12) \ 589 + (((u_32_t *)(_k))[0]) \ 590 + (((u_32_t *)(_k))[0] >> 12) \ 591 + _l) % (_m)) 592 593 #define LONG_SUM(_i) (((_i) & 0xffff) + ((_i) >> 16)) 594 #define LONG_SUM6(_i) (LONG_SUM(ntohl(((u_32_t *)(_i))[0])) + \ 595 LONG_SUM(ntohl(((u_32_t *)(_i))[1])) + \ 596 LONG_SUM(ntohl(((u_32_t *)(_i))[2])) + \ 597 LONG_SUM(ntohl(((u_32_t *)(_i))[3]))) 598 599 #define CALC_SUMD(s1, s2, sd) { \ 600 (s1) = ((s1) & 0xffff) + ((s1) >> 16); \ 601 (s2) = ((s2) & 0xffff) + ((s2) >> 16); \ 602 /* Do it twice */ \ 603 (s1) = ((s1) & 0xffff) + ((s1) >> 16); \ 604 (s2) = ((s2) & 0xffff) + ((s2) >> 16); \ 605 /* Because ~1 == -2, We really need ~1 == -1 */ \ 606 if ((s1) > (s2)) (s2)--; \ 607 (sd) = (s2) - (s1); \ 608 (sd) = ((sd) & 0xffff) + ((sd) >> 16); } 609 610 #define NAT_SYSSPACE 0x80000000 611 #define NAT_LOCKHELD 0x40000000 612 613 /* 614 * This is present in ip_nat.h because it needs to be shared between 615 * ip_nat.c and ip_nat6.c 616 */ 617 typedef struct ipf_nat_softc_s { 618 ipfmutex_t ipf_nat_new; 619 ipfmutex_t ipf_nat_io; 620 int ipf_nat_doflush; 621 int ipf_nat_logging; 622 int ipf_nat_lock; 623 int ipf_nat_inited; 624 int ipf_nat_table_wm_high; 625 int ipf_nat_table_wm_low; 626 u_int ipf_nat_table_max; 627 u_int ipf_nat_table_sz; 628 u_int ipf_nat_maprules_sz; 629 u_int ipf_nat_rdrrules_sz; 630 u_int ipf_nat_hostmap_sz; 631 u_int ipf_nat_maxbucket; 632 u_int ipf_nat_last_force_flush; 633 u_int ipf_nat_defage; 634 u_int ipf_nat_defipage; 635 u_int ipf_nat_deficmpage; 636 int ipf_nat_map_max; 637 int ipf_nat_map_masks[33]; 638 u_32_t ipf_nat_map_active_masks[33]; 639 int ipf_nat6_map_max; 640 int ipf_nat6_map_masks[129]; 641 i6addr_t ipf_nat6_map_active_masks[129]; 642 int ipf_nat_rdr_max; 643 int ipf_nat_rdr_masks[33]; 644 u_32_t ipf_nat_rdr_active_masks[33]; 645 int ipf_nat6_rdr_max; 646 int ipf_nat6_rdr_masks[129]; 647 i6addr_t ipf_nat6_rdr_active_masks[129]; 648 nat_t **ipf_nat_table[2]; 649 nat_t *ipf_nat_instances; 650 ipnat_t *ipf_nat_list; 651 ipnat_t **ipf_nat_map_rules; 652 ipnat_t **ipf_nat_rdr_rules; 653 ipftq_t *ipf_nat_utqe; 654 hostmap_t **ipf_hm_maptable ; 655 hostmap_t *ipf_hm_maplist ; 656 ipftuneable_t *ipf_nat_tune; 657 ipftq_t ipf_nat_udptq; 658 ipftq_t ipf_nat_udpacktq; 659 ipftq_t ipf_nat_icmptq; 660 ipftq_t ipf_nat_icmpacktq; 661 ipftq_t ipf_nat_iptq; 662 ipftq_t ipf_nat_pending; 663 ipftq_t ipf_nat_tcptq[IPF_TCP_NSTATES]; 664 natstat_t ipf_nat_stats; 665 } ipf_nat_softc_t ; 666 667 extern frentry_t ipfnatblock; 668 669 extern void ipf_fix_datacksum(u_short *, u_32_t); 670 extern void ipf_fix_incksum(fr_info_t *, u_short *, u_32_t); 671 extern void ipf_fix_outcksum(fr_info_t *, u_short *, u_32_t); 672 673 extern int ipf_nat_checkin(fr_info_t *, u_32_t *); 674 extern int ipf_nat_checkout(fr_info_t *, u_32_t *); 675 extern void ipf_nat_delete(ipf_main_softc_t *, struct nat *, int); 676 extern void ipf_nat_deref(ipf_main_softc_t *, nat_t **); 677 extern void ipf_nat_expire(ipf_main_softc_t *); 678 extern void ipf_nat_hostmapdel(hostmap_t **); 679 extern int ipf_nat_hostmap_rehash(ipf_main_softc_t *, 680 ipftuneable_t *, ipftuneval_t *); 681 extern nat_t *ipf_nat_icmperrorlookup(fr_info_t *, int); 682 extern nat_t *ipf_nat_icmperror(fr_info_t *, u_int *, int); 683 #if defined(__OpenBSD__) 684 extern void ipf_nat_ifdetach(void *); 685 #endif 686 extern int ipf_nat_init(void); 687 extern nat_t *ipf_nat_inlookup(fr_info_t *, u_int, u_int, 688 struct in_addr, struct in_addr); 689 extern int ipf_nat_in(fr_info_t *, nat_t *, int, u_32_t); 690 extern int ipf_nat_insert(ipf_main_softc_t *, ipf_nat_softc_t *, 691 nat_t *); 692 extern int ipf_nat_ioctl(ipf_main_softc_t *, void *, ioctlcmd_t, 693 int, int, void *); 694 extern frentry_t *ipf_nat_ipfin(fr_info_t *, u_32_t *); 695 extern frentry_t *ipf_nat_ipfout(fr_info_t *, u_32_t *); 696 extern void ipf_nat_log(ipf_main_softc_t *, ipf_nat_softc_t *, 697 struct nat *, u_int); 698 extern nat_t *ipf_nat_lookupredir(natlookup_t *); 699 extern nat_t *ipf_nat_maplookup(void *, u_int, struct in_addr, 700 struct in_addr); 701 extern nat_t *ipf_nat_add(fr_info_t *, ipnat_t *, nat_t **, 702 u_int, int); 703 extern int ipf_nat_out(fr_info_t *, nat_t *, int, u_32_t); 704 extern nat_t *ipf_nat_outlookup(fr_info_t *, u_int, u_int, 705 struct in_addr, struct in_addr); 706 extern u_short *ipf_nat_proto(fr_info_t *, nat_t *, u_int); 707 extern void ipf_nat_rulederef(ipf_main_softc_t *, ipnat_t **); 708 extern void ipf_nat_setqueue(ipf_main_softc_t *, ipf_nat_softc_t *, 709 nat_t *); 710 extern void ipf_nat_setpending(ipf_main_softc_t *, nat_t *); 711 extern nat_t *ipf_nat_tnlookup(fr_info_t *, int); 712 extern void ipf_nat_update(fr_info_t *, nat_t *); 713 extern frentry_t *ipf_nat_ipfin(fr_info_t *, u_32_t *); 714 extern frentry_t *ipf_nat_ipfout(fr_info_t *, u_32_t *); 715 extern int ipf_nat_in(fr_info_t *, nat_t *, int, u_32_t); 716 extern int ipf_nat_out(fr_info_t *, nat_t *, int, u_32_t); 717 extern int ipf_nat_rehash(ipf_main_softc_t *, ipftuneable_t *, 718 ipftuneval_t *); 719 extern int ipf_nat_rehash_rules(ipf_main_softc_t *, ipftuneable_t *, 720 ipftuneval_t *); 721 extern int ipf_nat_settimeout(struct ipf_main_softc_s *, 722 ipftuneable_t *, ipftuneval_t *); 723 extern void ipf_nat_sync(ipf_main_softc_t *, void *); 724 725 extern nat_t *ipf_nat_clone(fr_info_t *, nat_t *); 726 extern void ipf_nat_delmap(ipf_nat_softc_t *, ipnat_t *); 727 extern void ipf_nat_delrdr(ipf_nat_softc_t *, ipnat_t *); 728 extern void ipf_nat_delrule(ipf_main_softc_t *, ipf_nat_softc_t *, 729 ipnat_t *); 730 extern int ipf_nat_wildok(nat_t *, int, int, int, int); 731 extern void ipf_nat_setlock(void *, int); 732 extern void ipf_nat_load(void); 733 extern void *ipf_nat_soft_create(ipf_main_softc_t *); 734 extern int ipf_nat_soft_init(ipf_main_softc_t *, void *); 735 extern void ipf_nat_soft_destroy(ipf_main_softc_t *, void *); 736 extern int ipf_nat_soft_fini(ipf_main_softc_t *, void *); 737 extern int ipf_nat_main_load(void); 738 extern int ipf_nat_main_unload(void); 739 extern ipftq_t *ipf_nat_add_tq(ipf_main_softc_t *, int); 740 extern void ipf_nat_uncreate(fr_info_t *); 741 742 #ifdef USE_INET6 743 extern nat_t *ipf_nat6_add(fr_info_t *, ipnat_t *, nat_t **, 744 u_int, int); 745 extern void ipf_nat6_addrdr(ipf_nat_softc_t *, ipnat_t *); 746 extern void ipf_nat6_addmap(ipf_nat_softc_t *, ipnat_t *); 747 extern void ipf_nat6_addencap(ipf_nat_softc_t *, ipnat_t *); 748 extern int ipf_nat6_checkout(fr_info_t *, u_32_t *); 749 extern int ipf_nat6_checkin(fr_info_t *, u_32_t *); 750 extern int ipf_nat6_finalise(fr_info_t *, nat_t *); 751 extern nat_t *ipf_nat6_icmperror(fr_info_t *, u_int *, int); 752 extern nat_t *ipf_nat6_icmperrorlookup(fr_info_t *, int); 753 extern nat_t *ipf_nat6_inlookup(fr_info_t *, u_int, u_int, 754 struct in6_addr *, struct in6_addr *); 755 extern u_32_t ipf_nat6_ip6subtract(i6addr_t *, i6addr_t *); 756 extern frentry_t *ipf_nat6_ipfin(fr_info_t *, u_32_t *); 757 extern frentry_t *ipf_nat6_ipfout(fr_info_t *, u_32_t *); 758 extern nat_t *ipf_nat6_lookupredir(natlookup_t *); 759 extern int ipf_nat6_newmap(fr_info_t *, nat_t *, natinfo_t *); 760 extern int ipf_nat6_newrdr(fr_info_t *, nat_t *, natinfo_t *); 761 extern nat_t *ipf_nat6_outlookup(fr_info_t *, u_int, u_int, 762 struct in6_addr *, struct in6_addr *); 763 extern int ipf_nat6_newrewrite(fr_info_t *, nat_t *, natinfo_t *); 764 extern int ipf_nat6_newdivert(fr_info_t *, nat_t *, natinfo_t *); 765 extern int ipf_nat6_ruleaddrinit(ipf_main_softc_t *, ipf_nat_softc_t *, ipnat_t *); 766 767 #endif 768 769 770 #endif /* __IP_NAT_H__ */ 771
Indexes created Mon Sep 29 21:09:56 GMT 2025