ip_nat.h revision 1.5
1 /* $NetBSD: ip_nat.h,v 1.5 2013/01/05 16:34:43 christos 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 # if (defined(sun) && (defined(__svr4__) || defined(__SVR4))) 17 # define SOLARIS 1 18 # else 19 # define SOLARIS 0 20 # endif 21 #endif 22 23 #if defined(__STDC__) || defined(__GNUC__) || defined(_AIX51) 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 #else 30 #define SIOCADNAT _IOW(r, 60, struct ipfobj) 31 #define SIOCRMNAT _IOW(r, 61, struct ipfobj) 32 #define SIOCGNATS _IOWR(r, 62, struct ipfobj) 33 #define SIOCGNATL _IOWR(r, 63, struct ipfobj) 34 #define SIOCPURGENAT _IOWR(r, 100, struct ipfobj) 35 #endif 36 37 #undef LARGE_NAT /* define this if you're setting up a system to NAT 38 * LARGE numbers of networks/hosts - i.e. in the 39 * hundreds or thousands. In such a case, you should 40 * also change the RDR_SIZE and NAT_SIZE below to more 41 * appropriate sizes. The figures below were used for 42 * a setup with 1000-2000 networks to NAT. 43 */ 44 #ifndef NAT_SIZE 45 # ifdef LARGE_NAT 46 # define NAT_SIZE 2047 47 # else 48 # define NAT_SIZE 127 49 # endif 50 #endif 51 #ifndef RDR_SIZE 52 # ifdef LARGE_NAT 53 # define RDR_SIZE 2047 54 # else 55 # define RDR_SIZE 127 56 # endif 57 #endif 58 #ifndef HOSTMAP_SIZE 59 # ifdef LARGE_NAT 60 # define HOSTMAP_SIZE 8191 61 # else 62 # define HOSTMAP_SIZE 2047 63 # endif 64 #endif 65 #ifndef NAT_TABLE_MAX 66 /* 67 * This is newly introduced and for the sake of "least surprise", the numbers 68 * present aren't what we'd normally use for creating a proper hash table. 69 */ 70 # ifdef LARGE_NAT 71 # define NAT_TABLE_MAX 180000 72 # else 73 # define NAT_TABLE_MAX 30000 74 # endif 75 #endif 76 #ifndef NAT_TABLE_SZ 77 # ifdef LARGE_NAT 78 # define NAT_TABLE_SZ 16383 79 # else 80 # define NAT_TABLE_SZ 2047 81 # endif 82 #endif 83 #ifndef APR_LABELLEN 84 #define APR_LABELLEN 16 85 #endif 86 #define NAT_HW_CKSUM 0x80000000 87 #define NAT_HW_CKSUM_PART 0x40000000 88 89 #define DEF_NAT_AGE 1200 /* 10 minutes (600 seconds) */ 90 91 struct ipstate; 92 struct ap_session; 93 94 /* 95 * This structure is used in the active NAT table and represents an 96 * active NAT session. 97 */ 98 typedef struct nat { 99 ipfmutex_t nat_lock; 100 struct nat *nat_next; /* next nat_t in global linked list */ 101 struct nat **nat_pnext; /* ptr to the nat_next that points here */ 102 struct nat *nat_hnext[2]; /* next nat_t in hashtable bucket */ 103 struct nat **nat_phnext[2]; /* ptr to nat_hnext that points here */ 104 struct hostmap *nat_hm; 105 void *nat_data; 106 struct nat **nat_me; 107 struct ipstate *nat_state; 108 struct ap_session *nat_aps; /* proxy session */ 109 frentry_t *nat_fr; /* filter rule ptr if appropriate */ 110 struct ipnat *nat_ptr; /* pointer back to the rule */ 111 void *nat_ifps[2]; 112 void *nat_sync; 113 ipftqent_t nat_tqe; 114 int nat_mtu[2]; 115 u_32_t nat_flags; 116 u_32_t nat_sumd[2]; /* ip checksum delta for data segment*/ 117 u_32_t nat_ipsumd; /* ip checksum delta for ip header */ 118 u_32_t nat_mssclamp; /* if != zero clamp MSS to this */ 119 i6addr_t nat_odst6; 120 i6addr_t nat_osrc6; 121 i6addr_t nat_ndst6; 122 i6addr_t nat_nsrc6; 123 U_QUAD_T nat_pkts[2]; 124 U_QUAD_T nat_bytes[2]; 125 union { 126 udpinfo_t nat_unu; 127 tcpinfo_t nat_unt; 128 icmpinfo_t nat_uni; 129 greinfo_t nat_ugre; 130 } nat_unold, nat_unnew; 131 int nat_use; 132 int nat_pr[2]; /* protocol for NAT */ 133 int nat_dir; 134 int nat_ref; /* reference count */ 135 u_int nat_hv[2]; 136 char nat_ifnames[2][LIFNAMSIZ]; 137 int nat_rev; /* 0 = forward, 1 = reverse */ 138 int nat_dlocal; 139 int nat_v[2]; /* 0 = old, 1 = new */ 140 u_int nat_redir; /* copy of in_redir */ 141 } nat_t; 142 143 #define nat_osrcip nat_osrc6.in4 144 #define nat_odstip nat_odst6.in4 145 #define nat_nsrcip nat_nsrc6.in4 146 #define nat_ndstip nat_ndst6.in4 147 #define nat_osrcaddr nat_osrc6.in4.s_addr 148 #define nat_odstaddr nat_odst6.in4.s_addr 149 #define nat_nsrcaddr nat_nsrc6.in4.s_addr 150 #define nat_ndstaddr nat_ndst6.in4.s_addr 151 #define nat_age nat_tqe.tqe_die 152 #define nat_osport nat_unold.nat_unt.ts_sport 153 #define nat_odport nat_unold.nat_unt.ts_dport 154 #define nat_nsport nat_unnew.nat_unt.ts_sport 155 #define nat_ndport nat_unnew.nat_unt.ts_dport 156 #define nat_oicmpid nat_unold.nat_uni.ici_id 157 #define nat_nicmpid nat_unnew.nat_uni.ici_id 158 #define nat_type nat_unold.nat_uni.ici_type 159 #define nat_oseq nat_unold.nat_uni.ici_seq 160 #define nat_nseq nat_unnew.nat_uni.ici_seq 161 #define nat_tcpstate nat_tqe.tqe_state 162 #define nat_die nat_tqe.tqe_die 163 #define nat_touched nat_tqe.tqe_touched 164 165 /* 166 * Values for nat_dir 167 */ 168 #define NAT_INBOUND 0 169 #define NAT_OUTBOUND 1 170 #define NAT_ENCAPIN 2 171 #define NAT_ENCAPOUT 3 172 #define NAT_DIVERTIN 4 173 #define NAT_DIVERTOUT 5 174 175 /* 176 * Definitions for nat_flags 177 */ 178 #define NAT_TCP 0x0001 /* IPN_TCP */ 179 #define NAT_UDP 0x0002 /* IPN_UDP */ 180 #define NAT_ICMPERR 0x0004 /* IPN_ICMPERR */ 181 #define NAT_ICMPQUERY 0x0008 /* IPN_ICMPQUERY */ 182 #define NAT_SEARCH 0x0010 183 #define NAT_SLAVE 0x0020 /* Slave connection for a proxy */ 184 #define NAT_NOTRULEPORT 0x0040 /* Don't use the port # in the NAT rule */ 185 186 #define NAT_TCPUDP (NAT_TCP|NAT_UDP) 187 #define NAT_TCPUDPICMP (NAT_TCP|NAT_UDP|NAT_ICMPERR) 188 #define NAT_TCPUDPICMPQ (NAT_TCP|NAT_UDP|NAT_ICMPQUERY) 189 #define NAT_FROMRULE (NAT_TCP|NAT_UDP) 190 191 /* 0x0100 reserved for FI_W_SPORT */ 192 /* 0x0200 reserved for FI_W_DPORT */ 193 /* 0x0400 reserved for FI_W_SADDR */ 194 /* 0x0800 reserved for FI_W_DADDR */ 195 /* 0x1000 reserved for FI_W_NEWFR */ 196 /* 0x2000 reserved for SI_CLONE */ 197 /* 0x4000 reserved for SI_CLONED */ 198 /* 0x8000 reserved for SI_IGNOREPKT */ 199 200 #define NAT_DEBUG 0x800000 201 202 typedef struct nat_addr_s { 203 i6addr_t na_addr[2]; 204 i6addr_t na_nextaddr; 205 int na_atype; 206 int na_function; 207 } nat_addr_t; 208 209 #define na_nextip na_nextaddr.in4.s_addr 210 #define na_nextip6 na_nextaddr.in6 211 #define na_num na_addr[0].iplookupnum 212 #define na_type na_addr[0].iplookuptype 213 #define na_subtype na_addr[0].iplookupsubtype 214 #define na_ptr na_addr[1].iplookupptr 215 #define na_func na_addr[1].iplookupfunc 216 217 218 /* 219 * This structure represents an actual NAT rule, loaded by ipnat. 220 */ 221 typedef struct ipnat { 222 ipfmutex_t in_lock; 223 struct ipnat *in_next; /* NAT rule list next */ 224 struct ipnat **in_pnext; /* prior rdr next ptr */ 225 struct ipnat *in_rnext; /* rdr rule hash next */ 226 struct ipnat **in_prnext; /* prior rdr next ptr */ 227 struct ipnat *in_mnext; /* map rule hash next */ 228 struct ipnat **in_pmnext; /* prior map next ptr */ 229 struct ipftq *in_tqehead[2]; 230 void *in_ifps[2]; 231 void *in_apr; 232 char *in_comment; 233 mb_t *in_divmp; 234 void *in_pconf; 235 U_QUAD_T in_pkts[2]; 236 U_QUAD_T in_bytes[2]; 237 u_long in_space; 238 u_long in_hits; 239 int in_size; 240 int in_use; 241 u_int in_hv[2]; 242 int in_flineno; /* conf. file line number */ 243 int in_stepnext; 244 int in_dlocal; 245 u_short in_dpnext; 246 u_short in_spnext; 247 /* From here to the end is covered by IPN_CMPSIZ */ 248 u_char in_v[2]; /* 0 = old, 1 = new */ 249 u_32_t in_flags; 250 u_32_t in_mssclamp; /* if != 0 clamp MSS to this */ 251 u_int in_age[2]; 252 int in_redir; /* see below for values */ 253 int in_pr[2]; /* protocol. */ 254 nat_addr_t in_ndst; 255 nat_addr_t in_nsrc; 256 nat_addr_t in_osrc; 257 nat_addr_t in_odst; 258 frtuc_t in_tuc; 259 u_short in_ppip; /* ports per IP. */ 260 u_short in_ippip; /* IP #'s per IP# */ 261 u_short in_ndports[2]; 262 u_short in_nsports[2]; 263 int in_ifnames[2]; 264 int in_plabel; /* proxy label. */ 265 int in_pconfig; /* proxy label. */ 266 ipftag_t in_tag; 267 int in_namelen; 268 char in_names[1]; 269 } ipnat_t; 270 271 /* 272 * MAP-IN MAP-OUT RDR-IN RDR-OUT 273 * osrc X == src == src X 274 * odst X == dst == dst X 275 * nsrc == dst X X == dst 276 * ndst == src X X == src 277 */ 278 #define in_dpmin in_ndports[0] /* Also holds static redir port */ 279 #define in_dpmax in_ndports[1] 280 #define in_spmin in_nsports[0] /* Also holds static redir port */ 281 #define in_spmax in_nsports[1] 282 #define in_ndport in_ndports[0] 283 #define in_nsport in_nsports[0] 284 #define in_dipnext in_ndst.na_nextaddr.in4 285 #define in_dipnext6 in_ndst.na_nextaddr 286 #define in_dnip in_ndst.na_nextaddr.in4.s_addr 287 #define in_dnip6 in_ndst.na_nextaddr 288 #define in_sipnext in_nsrc.na_nextaddr.in4 289 #define in_snip in_nsrc.na_nextaddr.in4.s_addr 290 #define in_snip6 in_nsrc.na_nextaddr 291 #define in_odstip in_odst.na_addr[0].in4 292 #define in_odstip6 in_odst.na_addr[0] 293 #define in_odstaddr in_odst.na_addr[0].in4.s_addr 294 #define in_odstmsk in_odst.na_addr[1].in4.s_addr 295 #define in_odstmsk6 in_odst.na_addr[1] 296 #define in_odstatype in_odst.na_atype 297 #define in_osrcip in_osrc.na_addr[0].in4 298 #define in_osrcip6 in_osrc.na_addr[0] 299 #define in_osrcaddr in_osrc.na_addr[0].in4.s_addr 300 #define in_osrcmsk in_osrc.na_addr[1].in4.s_addr 301 #define in_osrcmsk6 in_osrc.na_addr[1] 302 #define in_osrcatype in_osrc.na_atype 303 #define in_ndstip in_ndst.na_addr[0].in4 304 #define in_ndstip6 in_ndst.na_addr[0] 305 #define in_ndstaddr in_ndst.na_addr[0].in4.s_addr 306 #define in_ndstmsk in_ndst.na_addr[1].in4.s_addr 307 #define in_ndstmsk6 in_ndst.na_addr[1] 308 #define in_ndstatype in_ndst.na_atype 309 #define in_ndstafunc in_ndst.na_function 310 #define in_nsrcip in_nsrc.na_addr[0].in4 311 #define in_nsrcip6 in_nsrc.na_addr[0] 312 #define in_nsrcaddr in_nsrc.na_addr[0].in4.s_addr 313 #define in_nsrcmsk in_nsrc.na_addr[1].in4.s_addr 314 #define in_nsrcmsk6 in_nsrc.na_addr[1] 315 #define in_nsrcatype in_nsrc.na_atype 316 #define in_nsrcafunc in_nsrc.na_function 317 #define in_scmp in_tuc.ftu_scmp 318 #define in_dcmp in_tuc.ftu_dcmp 319 #define in_stop in_tuc.ftu_stop 320 #define in_dtop in_tuc.ftu_dtop 321 #define in_osport in_tuc.ftu_sport 322 #define in_odport in_tuc.ftu_dport 323 #define in_ndstnum in_ndst.na_addr[0].iplookupnum 324 #define in_ndsttype in_ndst.na_addr[0].iplookuptype 325 #define in_ndstptr in_ndst.na_addr[1].iplookupptr 326 #define in_ndstfunc in_ndst.na_addr[1].iplookupfunc 327 #define in_nsrcnum in_nsrc.na_addr[0].iplookupnum 328 #define in_nsrctype in_nsrc.na_addr[0].iplookuptype 329 #define in_nsrcptr in_nsrc.na_addr[1].iplookupptr 330 #define in_nsrcfunc in_nsrc.na_addr[1].iplookupfunc 331 #define in_odstnum in_odst.na_addr[0].iplookupnum 332 #define in_odsttype in_odst.na_addr[0].iplookuptype 333 #define in_odstptr in_odst.na_addr[1].iplookupptr 334 #define in_odstfunc in_odst.na_addr[1].iplookupfunc 335 #define in_osrcnum in_osrc.na_addr[0].iplookupnum 336 #define in_osrctype in_osrc.na_addr[0].iplookuptype 337 #define in_osrcptr in_osrc.na_addr[1].iplookupptr 338 #define in_osrcfunc in_osrc.na_addr[1].iplookupfunc 339 #define in_icmpidmin in_nsports[0] 340 #define in_icmpidmax in_nsports[1] 341 342 /* 343 * Bit definitions for in_flags 344 */ 345 #define IPN_ANY 0x00000 346 #define IPN_TCP 0x00001 347 #define IPN_UDP 0x00002 348 #define IPN_TCPUDP (IPN_TCP|IPN_UDP) 349 #define IPN_ICMPERR 0x00004 350 #define IPN_TCPUDPICMP (IPN_TCP|IPN_UDP|IPN_ICMPERR) 351 #define IPN_ICMPQUERY 0x00008 352 #define IPN_TCPUDPICMPQ (IPN_TCP|IPN_UDP|IPN_ICMPQUERY) 353 #define IPN_RF (IPN_TCPUDP|IPN_DELETE|IPN_ICMPERR) 354 #define IPN_AUTOPORTMAP 0x00010 355 #define IPN_FILTER 0x00020 356 #define IPN_SPLIT 0x00040 357 #define IPN_ROUNDR 0x00080 358 #define IPN_SIPRANGE 0x00100 359 #define IPN_DIPRANGE 0x00200 360 #define IPN_NOTSRC 0x00400 361 #define IPN_NOTDST 0x00800 362 #define IPN_NO 0x01000 363 #define IPN_DYNSRCIP 0x02000 /* dynamic src IP# */ 364 #define IPN_DYNDSTIP 0x04000 /* dynamic dst IP# */ 365 #define IPN_DELETE 0x08000 366 #define IPN_STICKY 0x10000 367 #define IPN_FRAG 0x20000 368 #define IPN_FIXEDSPORT 0x40000 369 #define IPN_FIXEDDPORT 0x80000 370 #define IPN_FINDFORWARD 0x100000 371 #define IPN_IN 0x200000 372 #define IPN_SEQUENTIAL 0x400000 373 #define IPN_PURGE 0x800000 374 #define IPN_PROXYRULE 0x1000000 375 #define IPN_USERFLAGS (IPN_TCPUDP|IPN_AUTOPORTMAP|IPN_SIPRANGE|IPN_SPLIT|\ 376 IPN_ROUNDR|IPN_FILTER|IPN_NOTSRC|IPN_NOTDST|IPN_NO|\ 377 IPN_FRAG|IPN_STICKY|IPN_FIXEDDPORT|IPN_ICMPQUERY|\ 378 IPN_DIPRANGE|IPN_SEQUENTIAL|IPN_PURGE) 379 380 /* 381 * Values for in_redir 382 */ 383 #define NAT_MAP 0x01 384 #define NAT_REDIRECT 0x02 385 #define NAT_BIMAP (NAT_MAP|NAT_REDIRECT) 386 #define NAT_MAPBLK 0x04 387 #define NAT_REWRITE 0x08 388 #define NAT_ENCAP 0x10 389 #define NAT_DIVERTUDP 0x20 390 391 #define MAPBLK_MINPORT 1024 /* don't use reserved ports for src port */ 392 #define USABLE_PORTS (65536 - MAPBLK_MINPORT) 393 394 #define IPN_CMPSIZ (sizeof(ipnat_t) - offsetof(ipnat_t, in_v)) 395 396 typedef struct natlookup { 397 i6addr_t nl_inipaddr; 398 i6addr_t nl_outipaddr; 399 i6addr_t nl_realipaddr; 400 int nl_v; 401 int nl_flags; 402 u_short nl_inport; 403 u_short nl_outport; 404 u_short nl_realport; 405 } natlookup_t; 406 407 #define nl_inip nl_inipaddr.in4 408 #define nl_outip nl_outipaddr.in4 409 #define nl_realip nl_realipaddr.in4 410 #define nl_inip6 nl_inipaddr.in6 411 #define nl_outip6 nl_outipaddr.in6 412 #define nl_realip6 nl_realipaddr.in6 413 414 415 typedef struct nat_save { 416 void *ipn_next; 417 struct nat ipn_nat; 418 struct ipnat ipn_ipnat; 419 struct frentry ipn_fr; 420 int ipn_dsize; 421 char ipn_data[4]; 422 } nat_save_t; 423 424 #define ipn_rule ipn_nat.nat_fr 425 426 typedef struct natget { 427 void *ng_ptr; 428 int ng_sz; 429 } natget_t; 430 431 432 /* 433 * This structure gets used to help NAT sessions keep the same NAT rule (and 434 * thus translation for IP address) when: 435 * (a) round-robin redirects are in use 436 * (b) different IP add 437 */ 438 typedef struct hostmap { 439 struct hostmap *hm_hnext; 440 struct hostmap **hm_phnext; 441 struct hostmap *hm_next; 442 struct hostmap **hm_pnext; 443 struct ipnat *hm_ipnat; 444 i6addr_t hm_osrcip6; 445 i6addr_t hm_odstip6; 446 i6addr_t hm_nsrcip6; 447 i6addr_t hm_ndstip6; 448 u_32_t hm_port; 449 int hm_ref; 450 int hm_hv; 451 int hm_v; 452 } hostmap_t; 453 454 #define hm_osrcip hm_osrcip6.in4 455 #define hm_odstip hm_odstip6.in4 456 #define hm_nsrcip hm_nsrcip6.in4 457 #define hm_ndstip hm_ndstip6.in4 458 #define hm_osrc6 hm_osrcip6.in6 459 #define hm_odst6 hm_odstip6.in6 460 #define hm_nsrc6 hm_nsrcip6.in6 461 #define hm_ndst6 hm_ndstip6.in6 462 463 464 /* 465 * Structure used to pass information in to nat_newmap and nat_newrdr. 466 */ 467 typedef struct natinfo { 468 ipnat_t *nai_np; 469 u_32_t nai_sum1; 470 u_32_t nai_sum2; 471 struct in_addr nai_ip; /* In host byte order */ 472 u_short nai_port; 473 u_short nai_nport; 474 u_short nai_sport; 475 u_short nai_dport; 476 } natinfo_t; 477 478 479 typedef struct nat_stat_side { 480 u_int *ns_bucketlen; 481 nat_t **ns_table; 482 u_long ns_added; 483 u_long ns_appr_fail; 484 u_long ns_badnat; 485 u_long ns_badnatnew; 486 u_long ns_badnextaddr; 487 u_long ns_bucket_max; 488 u_long ns_clone_nomem; 489 u_long ns_decap_bad; 490 u_long ns_decap_fail; 491 u_long ns_decap_pullup; 492 u_long ns_divert_dup; 493 u_long ns_divert_exist; 494 u_long ns_drop; 495 u_long ns_encap_dup; 496 u_long ns_encap_pullup; 497 u_long ns_exhausted; 498 u_long ns_icmp_address; 499 u_long ns_icmp_basic; 500 u_long ns_icmp_mbuf; 501 u_long ns_icmp_notfound; 502 u_long ns_icmp_rebuild; 503 u_long ns_icmp_short; 504 u_long ns_icmp_size; 505 u_long ns_ifpaddrfail; 506 u_long ns_ignored; 507 u_long ns_insert_fail; 508 u_long ns_inuse; 509 u_long ns_log; 510 u_long ns_lookup_miss; 511 u_long ns_lookup_nowild; 512 u_long ns_new_ifpaddr; 513 u_long ns_memfail; 514 u_long ns_table_max; 515 u_long ns_translated; 516 u_long ns_unfinalised; 517 u_long ns_wrap; 518 u_long ns_xlate_null; 519 u_long ns_xlate_exists; 520 u_long ns_ipf_proxy_fail; 521 u_long ns_uncreate[2]; 522 } nat_stat_side_t; 523 524 525 typedef struct natstat { 526 nat_t *ns_instances; 527 ipnat_t *ns_list; 528 hostmap_t *ns_maplist; 529 hostmap_t **ns_maptable; 530 u_int ns_active; 531 u_long ns_addtrpnt; 532 u_long ns_divert_build; 533 u_long ns_expire; 534 u_long ns_flush_all; 535 u_long ns_flush_closing; 536 u_long ns_flush_queue; 537 u_long ns_flush_state; 538 u_long ns_flush_timeout; 539 u_long ns_hm_new; 540 u_long ns_hm_newfail; 541 u_long ns_hm_addref; 542 u_long ns_hm_nullnp; 543 u_long ns_log_ok; 544 u_long ns_log_fail; 545 u_int ns_hostmap_sz; 546 u_int ns_nattab_sz; 547 u_int ns_nattab_max; 548 u_int ns_orphans; 549 u_int ns_rules; 550 u_int ns_rules_map; 551 u_int ns_rules_rdr; 552 u_int ns_rultab_sz; 553 u_int ns_rdrtab_sz; 554 u_32_t ns_ticks; 555 u_int ns_trpntab_sz; 556 u_int ns_wilds; 557 u_long ns_proto[256]; 558 nat_stat_side_t ns_side[2]; 559 #ifdef USE_INET6 560 nat_stat_side_t ns_side6[2]; 561 #endif 562 } natstat_t; 563 564 typedef struct natlog { 565 i6addr_t nl_osrcip; 566 i6addr_t nl_odstip; 567 i6addr_t nl_nsrcip; 568 i6addr_t nl_ndstip; 569 u_short nl_osrcport; 570 u_short nl_odstport; 571 u_short nl_nsrcport; 572 u_short nl_ndstport; 573 int nl_action; 574 int nl_type; 575 int nl_rule; 576 U_QUAD_T nl_pkts[2]; 577 U_QUAD_T nl_bytes[2]; 578 u_char nl_p[2]; 579 u_char nl_v[2]; 580 u_char nl_ifnames[2][LIFNAMSIZ]; 581 } natlog_t; 582 583 584 #define NL_NEW 0 585 #define NL_CLONE 1 586 #define NL_PURGE 0xfffc 587 #define NL_DESTROY 0xfffd 588 #define NL_FLUSH 0xfffe 589 #define NL_EXPIRE 0xffff 590 591 #define NAT_HASH_FN(_k,_l,_m) (((_k) + ((_k) >> 12) + _l) % (_m)) 592 #define NAT_HASH_FN6(_k,_l,_m) ((((u_32_t *)(_k))[3] \ 593 + (((u_32_t *)(_k))[3] >> 12) \ 594 + (((u_32_t *)(_k))[2]) \ 595 + (((u_32_t *)(_k))[2] >> 12) \ 596 + (((u_32_t *)(_k))[1]) \ 597 + (((u_32_t *)(_k))[1] >> 12) \ 598 + (((u_32_t *)(_k))[0]) \ 599 + (((u_32_t *)(_k))[0] >> 12) \ 600 + _l) % (_m)) 601 602 #define LONG_SUM(_i) (((_i) & 0xffff) + ((_i) >> 16)) 603 #define LONG_SUM6(_i) (LONG_SUM(ntohl(((u_32_t *)(_i))[0])) + \ 604 LONG_SUM(ntohl(((u_32_t *)(_i))[1])) + \ 605 LONG_SUM(ntohl(((u_32_t *)(_i))[2])) + \ 606 LONG_SUM(ntohl(((u_32_t *)(_i))[3]))) 607 608 #define CALC_SUMD(s1, s2, sd) { \ 609 (s1) = ((s1) & 0xffff) + ((s1) >> 16); \ 610 (s2) = ((s2) & 0xffff) + ((s2) >> 16); \ 611 /* Do it twice */ \ 612 (s1) = ((s1) & 0xffff) + ((s1) >> 16); \ 613 (s2) = ((s2) & 0xffff) + ((s2) >> 16); \ 614 /* Because ~1 == -2, We really need ~1 == -1 */ \ 615 if ((s1) > (s2)) (s2)--; \ 616 (sd) = (s2) - (s1); \ 617 (sd) = ((sd) & 0xffff) + ((sd) >> 16); } 618 619 #define NAT_SYSSPACE 0x80000000 620 #define NAT_LOCKHELD 0x40000000 621 622 /* 623 * This is present in ip_nat.h because it needs to be shared between 624 * ip_nat.c and ip_nat6.c 625 */ 626 typedef struct ipf_nat_softc_s { 627 ipfmutex_t ipf_nat_new; 628 ipfmutex_t ipf_nat_io; 629 int ipf_nat_doflush; 630 int ipf_nat_logging; 631 int ipf_nat_lock; 632 int ipf_nat_inited; 633 int ipf_nat_table_wm_high; 634 int ipf_nat_table_wm_low; 635 u_int ipf_nat_table_max; 636 u_int ipf_nat_table_sz; 637 u_int ipf_nat_maprules_sz; 638 u_int ipf_nat_rdrrules_sz; 639 u_int ipf_nat_hostmap_sz; 640 u_int ipf_nat_maxbucket; 641 u_int ipf_nat_last_force_flush; 642 u_int ipf_nat_defage; 643 u_int ipf_nat_defipage; 644 u_int ipf_nat_deficmpage; 645 ipf_v4_masktab_t ipf_nat_map_mask; 646 ipf_v6_masktab_t ipf_nat6_map_mask; 647 ipf_v4_masktab_t ipf_nat_rdr_mask; 648 ipf_v6_masktab_t ipf_nat6_rdr_mask; 649 nat_t **ipf_nat_table[2]; 650 nat_t *ipf_nat_instances; 651 ipnat_t *ipf_nat_list; 652 ipnat_t **ipf_nat_list_tail; 653 ipnat_t **ipf_nat_map_rules; 654 ipnat_t **ipf_nat_rdr_rules; 655 ipftq_t *ipf_nat_utqe; 656 hostmap_t **ipf_hm_maptable ; 657 hostmap_t *ipf_hm_maplist ; 658 ipftuneable_t *ipf_nat_tune; 659 ipftq_t ipf_nat_udptq; 660 ipftq_t ipf_nat_udpacktq; 661 ipftq_t ipf_nat_icmptq; 662 ipftq_t ipf_nat_icmpacktq; 663 ipftq_t ipf_nat_iptq; 664 ipftq_t ipf_nat_pending; 665 ipftq_t ipf_nat_tcptq[IPF_TCP_NSTATES]; 666 natstat_t ipf_nat_stats; 667 } ipf_nat_softc_t ; 668 669 #define ipf_nat_map_max ipf_nat_map_mask.imt4_max 670 #define ipf_nat_rdr_max ipf_nat_rdr_mask.imt4_max 671 #define ipf_nat6_map_max ipf_nat6_map_mask.imt6_max 672 #define ipf_nat6_rdr_max ipf_nat6_rdr_mask.imt6_max 673 #define ipf_nat_map_active_masks ipf_nat_map_mask.imt4_active 674 #define ipf_nat_rdr_active_masks ipf_nat_rdr_mask.imt4_active 675 #define ipf_nat6_map_active_masks ipf_nat6_map_mask.imt6_active 676 #define ipf_nat6_rdr_active_masks ipf_nat6_rdr_mask.imt6_active 677 678 extern frentry_t ipfnatblock; 679 680 extern void ipf_fix_datacksum(u_short *, u_32_t); 681 extern void ipf_fix_incksum(int, u_short *, u_32_t, u_32_t); 682 extern void ipf_fix_outcksum(int, u_short *, u_32_t, u_32_t); 683 684 extern int ipf_nat_checkin(fr_info_t *, u_32_t *); 685 extern int ipf_nat_checkout(fr_info_t *, u_32_t *); 686 extern void ipf_nat_delete(ipf_main_softc_t *, struct nat *, int); 687 extern void ipf_nat_deref(ipf_main_softc_t *, nat_t **); 688 extern void ipf_nat_expire(ipf_main_softc_t *); 689 extern int ipf_nat_hashtab_add(ipf_main_softc_t *, 690 ipf_nat_softc_t *, nat_t *); 691 extern void ipf_nat_hostmapdel(ipf_main_softc_t *, hostmap_t **); 692 extern int ipf_nat_hostmap_rehash(ipf_main_softc_t *, 693 ipftuneable_t *, ipftuneval_t *); 694 extern nat_t *ipf_nat_icmperrorlookup(fr_info_t *, int); 695 extern nat_t *ipf_nat_icmperror(fr_info_t *, u_int *, int); 696 #if defined(__OpenBSD__) 697 extern void ipf_nat_ifdetach(void *); 698 #endif 699 extern int ipf_nat_init(void); 700 extern nat_t *ipf_nat_inlookup(fr_info_t *, u_int, u_int, 701 struct in_addr, struct in_addr); 702 extern int ipf_nat_in(fr_info_t *, nat_t *, int, u_32_t); 703 extern int ipf_nat_insert(ipf_main_softc_t *, ipf_nat_softc_t *, 704 nat_t *); 705 extern int ipf_nat_ioctl(ipf_main_softc_t *, void *, ioctlcmd_t, 706 int, int, void *); 707 extern void ipf_nat_log(ipf_main_softc_t *, ipf_nat_softc_t *, 708 struct nat *, u_int); 709 extern nat_t *ipf_nat_lookupredir(natlookup_t *); 710 extern nat_t *ipf_nat_maplookup(void *, u_int, struct in_addr, 711 struct in_addr); 712 extern nat_t *ipf_nat_add(fr_info_t *, ipnat_t *, nat_t **, 713 u_int, int); 714 extern int ipf_nat_out(fr_info_t *, nat_t *, int, u_32_t); 715 extern nat_t *ipf_nat_outlookup(fr_info_t *, u_int, u_int, 716 struct in_addr, struct in_addr); 717 extern u_short *ipf_nat_proto(fr_info_t *, nat_t *, u_int); 718 extern void ipf_nat_rule_deref(ipf_main_softc_t *, ipnat_t **); 719 extern void ipf_nat_setqueue(ipf_main_softc_t *, ipf_nat_softc_t *, 720 nat_t *); 721 extern void ipf_nat_setpending(ipf_main_softc_t *, nat_t *); 722 extern nat_t *ipf_nat_tnlookup(fr_info_t *, int); 723 extern void ipf_nat_update(fr_info_t *, nat_t *); 724 extern frentry_t *ipf_nat_ipfin(fr_info_t *, u_32_t *); 725 extern frentry_t *ipf_nat_ipfout(fr_info_t *, u_32_t *); 726 extern int ipf_nat_in(fr_info_t *, nat_t *, int, u_32_t); 727 extern int ipf_nat_out(fr_info_t *, nat_t *, int, u_32_t); 728 extern int ipf_nat_rehash(ipf_main_softc_t *, ipftuneable_t *, 729 ipftuneval_t *); 730 extern int ipf_nat_rehash_rules(ipf_main_softc_t *, ipftuneable_t *, 731 ipftuneval_t *); 732 extern int ipf_nat_settimeout(struct ipf_main_softc_s *, 733 ipftuneable_t *, ipftuneval_t *); 734 extern void ipf_nat_sync(ipf_main_softc_t *, void *); 735 736 extern nat_t *ipf_nat_clone(fr_info_t *, nat_t *); 737 extern void ipf_nat_delmap(ipf_nat_softc_t *, ipnat_t *); 738 extern void ipf_nat_delrdr(ipf_nat_softc_t *, ipnat_t *); 739 extern int ipf_nat_wildok(nat_t *, int, int, int, int); 740 extern void ipf_nat_setlock(void *, int); 741 extern void ipf_nat_load(void); 742 extern void *ipf_nat_soft_create(ipf_main_softc_t *); 743 extern int ipf_nat_soft_init(ipf_main_softc_t *, void *); 744 extern void ipf_nat_soft_destroy(ipf_main_softc_t *, void *); 745 extern int ipf_nat_soft_fini(ipf_main_softc_t *, void *); 746 extern int ipf_nat_main_load(void); 747 extern int ipf_nat_main_unload(void); 748 extern ipftq_t *ipf_nat_add_tq(ipf_main_softc_t *, int); 749 extern void ipf_nat_uncreate(fr_info_t *); 750 751 #ifdef USE_INET6 752 extern nat_t *ipf_nat6_add(fr_info_t *, ipnat_t *, nat_t **, 753 u_int, int); 754 extern void ipf_nat6_addrdr(ipf_nat_softc_t *, ipnat_t *); 755 extern void ipf_nat6_addmap(ipf_nat_softc_t *, ipnat_t *); 756 extern int ipf_nat6_checkout(fr_info_t *, u_32_t *); 757 extern int ipf_nat6_checkin(fr_info_t *, u_32_t *); 758 extern void ipf_nat6_delmap(ipf_nat_softc_t *, ipnat_t *); 759 extern void ipf_nat6_delrdr(ipf_nat_softc_t *, ipnat_t *); 760 extern int ipf_nat6_finalise(fr_info_t *, nat_t *); 761 extern nat_t *ipf_nat6_icmperror(fr_info_t *, u_int *, int); 762 extern nat_t *ipf_nat6_icmperrorlookup(fr_info_t *, int); 763 extern nat_t *ipf_nat6_inlookup(fr_info_t *, u_int, u_int, 764 struct in6_addr *, struct in6_addr *); 765 extern u_32_t ipf_nat6_ip6subtract(i6addr_t *, i6addr_t *); 766 extern frentry_t *ipf_nat6_ipfin(fr_info_t *, u_32_t *); 767 extern frentry_t *ipf_nat6_ipfout(fr_info_t *, u_32_t *); 768 extern nat_t *ipf_nat6_lookupredir(natlookup_t *); 769 extern int ipf_nat6_newmap(fr_info_t *, nat_t *, natinfo_t *); 770 extern int ipf_nat6_newrdr(fr_info_t *, nat_t *, natinfo_t *); 771 extern nat_t *ipf_nat6_outlookup(fr_info_t *, u_int, u_int, 772 struct in6_addr *, struct in6_addr *); 773 extern int ipf_nat6_newrewrite(fr_info_t *, nat_t *, natinfo_t *); 774 extern int ipf_nat6_newdivert(fr_info_t *, nat_t *, natinfo_t *); 775 extern int ipf_nat6_ruleaddrinit(ipf_main_softc_t *, ipf_nat_softc_t *, ipnat_t *); 776 777 #endif 778 779 780 #endif /* __IP_NAT_H__ */ 781
Indexes created Mon Oct 20 01:09:56 GMT 2025