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 # if defined(sun) && defined(__SVR4) 18 # define SOLARIS 1 19 # else 20 # define SOLARIS 0 21 # endif 22 #endif 23 24 #if defined(__STDC__) || defined(__GNUC__) || defined(_AIX51) 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 #define SIOCPURGENAT _IOWR('r', 100, struct ipfobj) 30 #else 31 #define SIOCADNAT _IOW(r, 60, struct ipfobj) 32 #define SIOCRMNAT _IOW(r, 61, struct ipfobj) 33 #define SIOCGNATS _IOWR(r, 62, struct ipfobj) 34 #define SIOCGNATL _IOWR(r, 63, struct ipfobj) 35 #define SIOCPURGENAT _IOWR(r, 100, struct ipfobj) 36 #endif 37 38 #undef LARGE_NAT /* define this if you're setting up a system to NAT 39 * LARGE numbers of networks/hosts - i.e. in the 40 * hundreds or thousands. In such a case, you should 41 * also change the RDR_SIZE and NAT_SIZE below to more 42 * appropriate sizes. The figures below were used for 43 * a setup with 1000-2000 networks to NAT. 44 */ 45 #ifndef NAT_SIZE 46 # ifdef LARGE_NAT 47 # define NAT_SIZE 2047 48 # else 49 # define NAT_SIZE 127 50 # endif 51 #endif 52 #ifndef RDR_SIZE 53 # ifdef LARGE_NAT 54 # define RDR_SIZE 2047 55 # else 56 # define RDR_SIZE 127 57 # endif 58 #endif 59 #ifndef HOSTMAP_SIZE 60 # ifdef LARGE_NAT 61 # define HOSTMAP_SIZE 8191 62 # else 63 # define HOSTMAP_SIZE 2047 64 # endif 65 #endif 66 #ifndef NAT_TABLE_MAX 67 /* 68 * This is newly introduced and for the sake of "least surprise", the numbers 69 * present aren't what we'd normally use for creating a proper hash table. 70 */ 71 # ifdef LARGE_NAT 72 # define NAT_TABLE_MAX 180000 73 # else 74 # define NAT_TABLE_MAX 30000 75 # endif 76 #endif 77 #ifndef NAT_TABLE_SZ 78 # ifdef LARGE_NAT 79 # define NAT_TABLE_SZ 16383 80 # else 81 # define NAT_TABLE_SZ 2047 82 # endif 83 #endif 84 #ifndef APR_LABELLEN 85 #define APR_LABELLEN 16 86 #endif 87 #define NAT_HW_CKSUM 0x80000000 88 #define NAT_HW_CKSUM_PART 0x40000000 89 90 #define DEF_NAT_AGE 1200 /* 10 minutes (600 seconds) */ 91 92 struct ipstate; 93 struct ap_session; 94 95 /* 96 * This structure is used in the active NAT table and represents an 97 * active NAT session. 98 */ 99 typedef struct nat { 100 ipfmutex_t nat_lock; 101 struct nat *nat_next; 102 struct nat **nat_pnext; 103 struct nat *nat_hnext[2]; 104 struct nat **nat_phnext[2]; 105 struct hostmap *nat_hm; 106 void *nat_data; 107 struct nat **nat_me; 108 struct ipstate *nat_state; 109 struct ap_session *nat_aps; /* proxy session */ 110 frentry_t *nat_fr; /* filter rule ptr if appropriate */ 111 struct ipnat *nat_ptr; /* pointer back to the rule */ 112 void *nat_ifps[2]; 113 void *nat_sync; 114 ipftqent_t nat_tqe; 115 int nat_mtu[2]; 116 u_32_t nat_flags; 117 u_32_t nat_sumd[2]; /* ip checksum delta for data segment*/ 118 u_32_t nat_ipsumd; /* ip checksum delta for ip header */ 119 u_32_t nat_mssclamp; /* if != zero clamp MSS to this */ 120 i6addr_t nat_odst6; 121 i6addr_t nat_osrc6; 122 i6addr_t nat_ndst6; 123 i6addr_t nat_nsrc6; 124 U_QUAD_T nat_pkts[2]; 125 U_QUAD_T nat_bytes[2]; 126 union { 127 udpinfo_t nat_unu; 128 tcpinfo_t nat_unt; 129 icmpinfo_t nat_uni; 130 greinfo_t nat_ugre; 131 } nat_unold, nat_unnew; 132 int nat_use; 133 int nat_pr[2]; /* protocol for NAT */ 134 int nat_dir; 135 int nat_ref; /* reference count */ 136 u_int nat_hv[2]; 137 char nat_ifnames[2][LIFNAMSIZ]; 138 int nat_rev; /* 0 = forward, 1 = reverse */ 139 int nat_dlocal; 140 int nat_v[2]; /* 0 = old, 1 = new */ 141 u_int nat_redir; /* copy of in_redir */ 142 } nat_t; 143 144 #define nat_osrcip nat_osrc6.in4 145 #define nat_odstip nat_odst6.in4 146 #define nat_nsrcip nat_nsrc6.in4 147 #define nat_ndstip nat_ndst6.in4 148 #define nat_osrcaddr nat_osrc6.in4.s_addr 149 #define nat_odstaddr nat_odst6.in4.s_addr 150 #define nat_nsrcaddr nat_nsrc6.in4.s_addr 151 #define nat_ndstaddr nat_ndst6.in4.s_addr 152 #define nat_age nat_tqe.tqe_die 153 #define nat_osport nat_unold.nat_unt.ts_sport 154 #define nat_odport nat_unold.nat_unt.ts_dport 155 #define nat_nsport nat_unnew.nat_unt.ts_sport 156 #define nat_ndport nat_unnew.nat_unt.ts_dport 157 #define nat_oicmpid nat_unold.nat_uni.ici_id 158 #define nat_nicmpid nat_unnew.nat_uni.ici_id 159 #define nat_type nat_unold.nat_uni.ici_type 160 #define nat_oseq nat_unold.nat_uni.ici_seq 161 #define nat_nseq nat_unnew.nat_uni.ici_seq 162 #define nat_tcpstate nat_tqe.tqe_state 163 #define nat_die nat_tqe.tqe_die 164 #define nat_touched nat_tqe.tqe_touched 165 166 /* 167 * Values for nat_dir 168 */ 169 #define NAT_INBOUND 0 170 #define NAT_OUTBOUND 1 171 #define NAT_ENCAPIN 2 172 #define NAT_ENCAPOUT 3 173 #define NAT_DIVERTIN 4 174 #define NAT_DIVERTOUT 5 175 176 /* 177 * Definitions for nat_flags 178 */ 179 #define NAT_TCP 0x0001 /* IPN_TCP */ 180 #define NAT_UDP 0x0002 /* IPN_UDP */ 181 #define NAT_ICMPERR 0x0004 /* IPN_ICMPERR */ 182 #define NAT_ICMPQUERY 0x0008 /* IPN_ICMPQUERY */ 183 #define NAT_SEARCH 0x0010 184 #define NAT_SLAVE 0x0020 /* Slave connection for a proxy */ 185 #define NAT_NOTRULEPORT 0x0040 /* Don't use the port # in the NAT rule */ 186 187 #define NAT_TCPUDP (NAT_TCP|NAT_UDP) 188 #define NAT_TCPUDPICMP (NAT_TCP|NAT_UDP|NAT_ICMPERR) 189 #define NAT_TCPUDPICMPQ (NAT_TCP|NAT_UDP|NAT_ICMPQUERY) 190 #define NAT_FROMRULE (NAT_TCP|NAT_UDP) 191 192 /* 0x0100 reserved for FI_W_SPORT */ 193 /* 0x0200 reserved for FI_W_DPORT */ 194 /* 0x0400 reserved for FI_W_SADDR */ 195 /* 0x0800 reserved for FI_W_DADDR */ 196 /* 0x1000 reserved for FI_W_NEWFR */ 197 /* 0x2000 reserved for SI_CLONE */ 198 /* 0x4000 reserved for SI_CLONED */ 199 /* 0x8000 reserved for SI_IGNOREPKT */ 200 201 #define NAT_DEBUG 0x800000 202 203 typedef struct nat_addr_s { 204 i6addr_t na_addr[2]; 205 i6addr_t na_nextaddr; 206 int na_atype; 207 int na_function; 208 } nat_addr_t; 209 210 #define na_nextip na_nextaddr.in4.s_addr 211 #define na_nextip6 na_nextaddr.in6 212 #define na_num na_addr[0].iplookupnum 213 #define na_type na_addr[0].iplookuptype 214 #define na_subtype na_addr[0].iplookupsubtype 215 #define na_ptr na_addr[1].iplookupptr 216 #define na_func na_addr[1].iplookupfunc 217 218 219 /* 220 * This structure represents an actual NAT rule, loaded by ipnat. 221 */ 222 typedef struct ipnat { 223 ipfmutex_t in_lock; 224 struct ipnat *in_next; /* NAT rule list next */ 225 struct ipnat **in_pnext; /* prior rdr next ptr */ 226 struct ipnat *in_rnext; /* rdr rule hash next */ 227 struct ipnat **in_prnext; /* prior rdr next ptr */ 228 struct ipnat *in_mnext; /* map rule hash next */ 229 struct ipnat **in_pmnext; /* prior map next ptr */ 230 struct ipftq *in_tqehead[2]; 231 void *in_ifps[2]; 232 void *in_apr; 233 char *in_comment; 234 mb_t *in_divmp; 235 void *in_pconf; 236 U_QUAD_T in_pkts[2]; 237 U_QUAD_T in_bytes[2]; 238 u_long in_space; 239 u_long in_hits; 240 int in_size; 241 int in_use; 242 u_int in_hv[2]; 243 int in_flineno; /* conf. file line number */ 244 int in_stepnext; 245 int in_dlocal; 246 u_short in_dpnext; 247 u_short in_spnext; 248 /* From here to the end is covered by IPN_CMPSIZ */ 249 u_char in_v[2]; /* 0 = old, 1 = new */ 250 u_32_t in_flags; 251 u_32_t in_mssclamp; /* if != 0 clamp MSS to this */ 252 u_int in_age[2]; 253 int in_redir; /* see below for values */ 254 int in_pr[2]; /* protocol. */ 255 nat_addr_t in_ndst; 256 nat_addr_t in_nsrc; 257 nat_addr_t in_osrc; 258 nat_addr_t in_odst; 259 frtuc_t in_tuc; 260 u_short in_ppip; /* ports per IP. */ 261 u_short in_ippip; /* IP #'s per IP# */ 262 u_short in_ndports[2]; 263 u_short in_nsports[2]; 264 int in_ifnames[2]; 265 int in_plabel; /* proxy label. */ 266 int in_pconfig; /* proxy label. */ 267 ipftag_t in_tag; 268 int in_namelen; 269 char in_names[1]; 270 } ipnat_t; 271 272 /* 273 * MAP-IN MAP-OUT RDR-IN RDR-OUT 274 * osrc X == src == src X 275 * odst X == dst == dst X 276 * nsrc == dst X X == dst 277 * ndst == src X X == src 278 */ 279 #define in_dpmin in_ndports[0] /* Also holds static redir port */ 280 #define in_dpmax in_ndports[1] 281 #define in_spmin in_nsports[0] /* Also holds static redir port */ 282 #define in_spmax in_nsports[1] 283 #define in_ndport in_ndports[0] 284 #define in_nsport in_nsports[0] 285 #define in_dipnext in_ndst.na_nextaddr.in4 286 #define in_dipnext6 in_ndst.na_nextaddr 287 #define in_dnip in_ndst.na_nextaddr.in4.s_addr 288 #define in_dnip6 in_ndst.na_nextaddr 289 #define in_sipnext in_nsrc.na_nextaddr.in4 290 #define in_snip in_nsrc.na_nextaddr.in4.s_addr 291 #define in_snip6 in_nsrc.na_nextaddr 292 #define in_odstip in_odst.na_addr[0].in4 293 #define in_odstip6 in_odst.na_addr[0] 294 #define in_odstaddr in_odst.na_addr[0].in4.s_addr 295 #define in_odstmsk in_odst.na_addr[1].in4.s_addr 296 #define in_odstmsk6 in_odst.na_addr[1] 297 #define in_odstatype in_odst.na_atype 298 #define in_osrcip in_osrc.na_addr[0].in4 299 #define in_osrcip6 in_osrc.na_addr[0] 300 #define in_osrcaddr in_osrc.na_addr[0].in4.s_addr 301 #define in_osrcmsk in_osrc.na_addr[1].in4.s_addr 302 #define in_osrcmsk6 in_osrc.na_addr[1] 303 #define in_osrcatype in_osrc.na_atype 304 #define in_ndstip in_ndst.na_addr[0].in4 305 #define in_ndstip6 in_ndst.na_addr[0] 306 #define in_ndstaddr in_ndst.na_addr[0].in4.s_addr 307 #define in_ndstmsk in_ndst.na_addr[1].in4.s_addr 308 #define in_ndstmsk6 in_ndst.na_addr[1] 309 #define in_ndstatype in_ndst.na_atype 310 #define in_ndstafunc in_ndst.na_function 311 #define in_nsrcip in_nsrc.na_addr[0].in4 312 #define in_nsrcip6 in_nsrc.na_addr[0] 313 #define in_nsrcaddr in_nsrc.na_addr[0].in4.s_addr 314 #define in_nsrcmsk in_nsrc.na_addr[1].in4.s_addr 315 #define in_nsrcmsk6 in_nsrc.na_addr[1] 316 #define in_nsrcatype in_nsrc.na_atype 317 #define in_nsrcafunc in_nsrc.na_function 318 #define in_scmp in_tuc.ftu_scmp 319 #define in_dcmp in_tuc.ftu_dcmp 320 #define in_stop in_tuc.ftu_stop 321 #define in_dtop in_tuc.ftu_dtop 322 #define in_osport in_tuc.ftu_sport 323 #define in_odport in_tuc.ftu_dport 324 #define in_ndstnum in_ndst.na_addr[0].iplookupnum 325 #define in_ndsttype in_ndst.na_addr[0].iplookuptype 326 #define in_ndstptr in_ndst.na_addr[1].iplookupptr 327 #define in_ndstfunc in_ndst.na_addr[1].iplookupfunc 328 #define in_nsrcnum in_nsrc.na_addr[0].iplookupnum 329 #define in_nsrctype in_nsrc.na_addr[0].iplookuptype 330 #define in_nsrcptr in_nsrc.na_addr[1].iplookupptr 331 #define in_nsrcfunc in_nsrc.na_addr[1].iplookupfunc 332 #define in_odstnum in_odst.na_addr[0].iplookupnum 333 #define in_odsttype in_odst.na_addr[0].iplookuptype 334 #define in_odstptr in_odst.na_addr[1].iplookupptr 335 #define in_odstfunc in_odst.na_addr[1].iplookupfunc 336 #define in_osrcnum in_osrc.na_addr[0].iplookupnum 337 #define in_osrctype in_osrc.na_addr[0].iplookuptype 338 #define in_osrcptr in_osrc.na_addr[1].iplookupptr 339 #define in_osrcfunc in_osrc.na_addr[1].iplookupfunc 340 #define in_icmpidmin in_nsports[0] 341 #define in_icmpidmax in_nsports[1] 342 343 /* 344 * Bit definitions for in_flags 345 */ 346 #define IPN_ANY 0x00000 347 #define IPN_TCP 0x00001 348 #define IPN_UDP 0x00002 349 #define IPN_TCPUDP (IPN_TCP|IPN_UDP) 350 #define IPN_ICMPERR 0x00004 351 #define IPN_TCPUDPICMP (IPN_TCP|IPN_UDP|IPN_ICMPERR) 352 #define IPN_ICMPQUERY 0x00008 353 #define IPN_TCPUDPICMPQ (IPN_TCP|IPN_UDP|IPN_ICMPQUERY) 354 #define IPN_RF (IPN_TCPUDP|IPN_DELETE|IPN_ICMPERR) 355 #define IPN_AUTOPORTMAP 0x00010 356 #define IPN_FILTER 0x00020 357 #define IPN_SPLIT 0x00040 358 #define IPN_ROUNDR 0x00080 359 #define IPN_SIPRANGE 0x00100 360 #define IPN_DIPRANGE 0x00200 361 #define IPN_NOTSRC 0x00400 362 #define IPN_NOTDST 0x00800 363 #define IPN_NO 0x01000 364 #define IPN_DYNSRCIP 0x02000 /* dynamic src IP# */ 365 #define IPN_DYNDSTIP 0x04000 /* dynamic dst IP# */ 366 #define IPN_DELETE 0x08000 367 #define IPN_STICKY 0x10000 368 #define IPN_FRAG 0x20000 369 #define IPN_FIXEDSPORT 0x40000 370 #define IPN_FIXEDDPORT 0x80000 371 #define IPN_FINDFORWARD 0x100000 372 #define IPN_IN 0x200000 373 #define IPN_SEQUENTIAL 0x400000 374 #define IPN_PURGE 0x800000 375 #define IPN_PROXYRULE 0x1000000 376 #define IPN_USERFLAGS (IPN_TCPUDP|IPN_AUTOPORTMAP|IPN_SIPRANGE|IPN_SPLIT|\ 377 IPN_ROUNDR|IPN_FILTER|IPN_NOTSRC|IPN_NOTDST|IPN_NO|\ 378 IPN_FRAG|IPN_STICKY|IPN_FIXEDDPORT|IPN_ICMPQUERY|\ 379 IPN_DIPRANGE|IPN_SEQUENTIAL|IPN_PURGE) 380 381 /* 382 * Values for in_redir 383 */ 384 #define NAT_MAP 0x01 385 #define NAT_REDIRECT 0x02 386 #define NAT_BIMAP (NAT_MAP|NAT_REDIRECT) 387 #define NAT_MAPBLK 0x04 388 #define NAT_REWRITE 0x08 389 #define NAT_ENCAP 0x10 390 #define NAT_DIVERTUDP 0x20 391 392 #define MAPBLK_MINPORT 1024 /* don't use reserved ports for src port */ 393 #define USABLE_PORTS (65536 - MAPBLK_MINPORT) 394 395 #define IPN_CMPSIZ (sizeof(ipnat_t) - offsetof(ipnat_t, in_v)) 396 397 typedef struct natlookup { 398 i6addr_t nl_inipaddr; 399 i6addr_t nl_outipaddr; 400 i6addr_t nl_realipaddr; 401 int nl_v; 402 int nl_flags; 403 u_short nl_inport; 404 u_short nl_outport; 405 u_short nl_realport; 406 } natlookup_t; 407 408 #define nl_inip nl_inipaddr.in4 409 #define nl_outip nl_outipaddr.in4 410 #define nl_realip nl_realipaddr.in4 411 #define nl_inip6 nl_inipaddr.in6 412 #define nl_outip6 nl_outipaddr.in6 413 #define nl_realip6 nl_realipaddr.in6 414 415 416 typedef struct nat_save { 417 void *ipn_next; 418 struct nat ipn_nat; 419 struct ipnat ipn_ipnat; 420 struct frentry ipn_fr; 421 int ipn_dsize; 422 char ipn_data[4]; 423 } nat_save_t; 424 425 #define ipn_rule ipn_nat.nat_fr 426 427 typedef struct natget { 428 void *ng_ptr; 429 int ng_sz; 430 } natget_t; 431 432 433 /* 434 * This structure gets used to help NAT sessions keep the same NAT rule (and 435 * thus translation for IP address) when: 436 * (a) round-robin redirects are in use 437 * (b) different IP add 438 */ 439 typedef struct hostmap { 440 struct hostmap *hm_hnext; 441 struct hostmap **hm_phnext; 442 struct hostmap *hm_next; 443 struct hostmap **hm_pnext; 444 struct ipnat *hm_ipnat; 445 i6addr_t hm_osrcip6; 446 i6addr_t hm_odstip6; 447 i6addr_t hm_nsrcip6; 448 i6addr_t hm_ndstip6; 449 u_32_t hm_port; 450 int hm_ref; 451 int hm_hv; 452 int hm_v; 453 } hostmap_t; 454 455 #define hm_osrcip hm_osrcip6.in4 456 #define hm_odstip hm_odstip6.in4 457 #define hm_nsrcip hm_nsrcip6.in4 458 #define hm_ndstip hm_ndstip6.in4 459 #define hm_osrc6 hm_osrcip6.in6 460 #define hm_odst6 hm_odstip6.in6 461 #define hm_nsrc6 hm_nsrcip6.in6 462 #define hm_ndst6 hm_ndstip6.in6 463 464 465 /* 466 * Structure used to pass information in to nat_newmap and nat_newrdr. 467 */ 468 typedef struct natinfo { 469 ipnat_t *nai_np; 470 u_32_t nai_sum1; 471 u_32_t nai_sum2; 472 struct in_addr nai_ip; /* In host byte order */ 473 u_short nai_port; 474 u_short nai_nport; 475 u_short nai_sport; 476 u_short nai_dport; 477 } natinfo_t; 478 479 480 typedef struct nat_stat_side { 481 u_int *ns_bucketlen; 482 nat_t **ns_table; 483 u_long ns_added; 484 u_long ns_appr_fail; 485 u_long ns_badnat; 486 u_long ns_badnatnew; 487 u_long ns_badnextaddr; 488 u_long ns_bucket_max; 489 u_long ns_clone_nomem; 490 u_long ns_decap_bad; 491 u_long ns_decap_fail; 492 u_long ns_decap_pullup; 493 u_long ns_divert_dup; 494 u_long ns_divert_exist; 495 u_long ns_drop; 496 u_long ns_encap_dup; 497 u_long ns_encap_pullup; 498 u_long ns_exhausted; 499 u_long ns_icmp_address; 500 u_long ns_icmp_basic; 501 u_long ns_icmp_mbuf; 502 u_long ns_icmp_notfound; 503 u_long ns_icmp_rebuild; 504 u_long ns_icmp_short; 505 u_long ns_icmp_size; 506 u_long ns_ifpaddrfail; 507 u_long ns_ignored; 508 u_long ns_insert_fail; 509 u_long ns_inuse; 510 u_long ns_log; 511 u_long ns_lookup_miss; 512 u_long ns_lookup_nowild; 513 u_long ns_new_ifpaddr; 514 u_long ns_memfail; 515 u_long ns_table_max; 516 u_long ns_translated; 517 u_long ns_unfinalised; 518 u_long ns_wrap; 519 u_long ns_xlate_null; 520 u_long ns_xlate_exists; 521 u_long ns_ipf_proxy_fail; 522 u_long ns_uncreate[2]; 523 } nat_stat_side_t; 524 525 526 typedef struct natstat { 527 nat_t *ns_instances; 528 ipnat_t *ns_list; 529 hostmap_t *ns_maplist; 530 hostmap_t **ns_maptable; 531 u_int ns_active; 532 u_long ns_addtrpnt; 533 u_long ns_divert_build; 534 u_long ns_expire; 535 u_long ns_flush_all; 536 u_long ns_flush_closing; 537 u_long ns_flush_queue; 538 u_long ns_flush_state; 539 u_long ns_flush_timeout; 540 u_long ns_hm_new; 541 u_long ns_hm_newfail; 542 u_long ns_hm_addref; 543 u_long ns_hm_nullnp; 544 u_long ns_log_ok; 545 u_long ns_log_fail; 546 u_int ns_hostmap_sz; 547 u_int ns_nattab_sz; 548 u_int ns_nattab_max; 549 u_int ns_orphans; 550 u_int ns_rules; 551 u_int ns_rules_map; 552 u_int ns_rules_rdr; 553 u_int ns_rultab_sz; 554 u_int ns_rdrtab_sz; 555 u_32_t ns_ticks; 556 u_int ns_trpntab_sz; 557 u_int ns_wilds; 558 u_long ns_proto[256]; 559 nat_stat_side_t ns_side[2]; 560 #ifdef USE_INET6 561 nat_stat_side_t ns_side6[2]; 562 #endif 563 } natstat_t; 564 565 typedef struct natlog { 566 i6addr_t nl_osrcip; 567 i6addr_t nl_odstip; 568 i6addr_t nl_nsrcip; 569 i6addr_t nl_ndstip; 570 u_short nl_osrcport; 571 u_short nl_odstport; 572 u_short nl_nsrcport; 573 u_short nl_ndstport; 574 int nl_action; 575 int nl_type; 576 int nl_rule; 577 U_QUAD_T nl_pkts[2]; 578 U_QUAD_T nl_bytes[2]; 579 u_char nl_p[2]; 580 u_char nl_v[2]; 581 u_char nl_ifnames[2][LIFNAMSIZ]; 582 } natlog_t; 583 584 585 #define NL_NEW 0 586 #define NL_CLONE 1 587 #define NL_PURGE 0xfffc 588 #define NL_DESTROY 0xfffd 589 #define NL_FLUSH 0xfffe 590 #define NL_EXPIRE 0xffff 591 592 #define NAT_HASH_FN(_k,_l,_m) (((_k) + ((_k) >> 12) + _l) % (_m)) 593 #define NAT_HASH_FN6(_k,_l,_m) ((((u_32_t *)(_k))[3] \ 594 + (((u_32_t *)(_k))[3] >> 12) \ 595 + (((u_32_t *)(_k))[2]) \ 596 + (((u_32_t *)(_k))[2] >> 12) \ 597 + (((u_32_t *)(_k))[1]) \ 598 + (((u_32_t *)(_k))[1] >> 12) \ 599 + (((u_32_t *)(_k))[0]) \ 600 + (((u_32_t *)(_k))[0] >> 12) \ 601 + _l) % (_m)) 602 603 #define LONG_SUM(_i) (((_i) & 0xffff) + ((_i) >> 16)) 604 #define LONG_SUM6(_i) (LONG_SUM(ntohl(((u_32_t *)(_i))[0])) + \ 605 LONG_SUM(ntohl(((u_32_t *)(_i))[1])) + \ 606 LONG_SUM(ntohl(((u_32_t *)(_i))[2])) + \ 607 LONG_SUM(ntohl(((u_32_t *)(_i))[3]))) 608 609 #define CALC_SUMD(s1, s2, sd) { \ 610 (s1) = ((s1) & 0xffff) + ((s1) >> 16); \ 611 (s2) = ((s2) & 0xffff) + ((s2) >> 16); \ 612 /* Do it twice */ \ 613 (s1) = ((s1) & 0xffff) + ((s1) >> 16); \ 614 (s2) = ((s2) & 0xffff) + ((s2) >> 16); \ 615 /* Because ~1 == -2, We really need ~1 == -1 */ \ 616 if ((s1) > (s2)) (s2)--; \ 617 (sd) = (s2) - (s1); \ 618 (sd) = ((sd) & 0xffff) + ((sd) >> 16); } 619 620 #define NAT_SYSSPACE 0x80000000 621 #define NAT_LOCKHELD 0x40000000 622 623 /* 624 * This is present in ip_nat.h because it needs to be shared between 625 * ip_nat.c and ip_nat6.c 626 */ 627 typedef struct ipf_nat_softc_s { 628 ipfmutex_t ipf_nat_new; 629 ipfmutex_t ipf_nat_io; 630 int ipf_nat_doflush; 631 int ipf_nat_logging; 632 int ipf_nat_lock; 633 int ipf_nat_inited; 634 int ipf_nat_table_wm_high; 635 int ipf_nat_table_wm_low; 636 u_int ipf_nat_table_max; 637 u_int ipf_nat_table_sz; 638 u_int ipf_nat_maprules_sz; 639 u_int ipf_nat_rdrrules_sz; 640 u_int ipf_nat_hostmap_sz; 641 u_int ipf_nat_maxbucket; 642 u_int ipf_nat_last_force_flush; 643 u_int ipf_nat_defage; 644 u_int ipf_nat_defipage; 645 u_int ipf_nat_deficmpage; 646 ipf_v4_masktab_t ipf_nat_map_mask; 647 ipf_v6_masktab_t ipf_nat6_map_mask; 648 ipf_v4_masktab_t ipf_nat_rdr_mask; 649 ipf_v6_masktab_t ipf_nat6_rdr_mask; 650 nat_t **ipf_nat_table[2]; 651 nat_t *ipf_nat_instances; 652 ipnat_t *ipf_nat_list; 653 ipnat_t **ipf_nat_list_tail; 654 ipnat_t **ipf_nat_map_rules; 655 ipnat_t **ipf_nat_rdr_rules; 656 ipftq_t *ipf_nat_utqe; 657 hostmap_t **ipf_hm_maptable ; 658 hostmap_t *ipf_hm_maplist ; 659 ipftuneable_t *ipf_nat_tune; 660 ipftq_t ipf_nat_udptq; 661 ipftq_t ipf_nat_udpacktq; 662 ipftq_t ipf_nat_icmptq; 663 ipftq_t ipf_nat_icmpacktq; 664 ipftq_t ipf_nat_iptq; 665 ipftq_t ipf_nat_pending; 666 ipftq_t ipf_nat_tcptq[IPF_TCP_NSTATES]; 667 natstat_t ipf_nat_stats; 668 } ipf_nat_softc_t ; 669 670 #define ipf_nat_map_max ipf_nat_map_mask.imt4_max 671 #define ipf_nat_rdr_max ipf_nat_rdr_mask.imt4_max 672 #define ipf_nat6_map_max ipf_nat6_map_mask.imt6_max 673 #define ipf_nat6_rdr_max ipf_nat6_rdr_mask.imt6_max 674 #define ipf_nat_map_active_masks ipf_nat_map_mask.imt4_active 675 #define ipf_nat_rdr_active_masks ipf_nat_rdr_mask.imt4_active 676 #define ipf_nat6_map_active_masks ipf_nat6_map_mask.imt6_active 677 #define ipf_nat6_rdr_active_masks ipf_nat6_rdr_mask.imt6_active 678 679 extern frentry_t ipfnatblock; 680 681 extern void ipf_fix_datacksum __P((u_short *, u_32_t)); 682 extern void ipf_fix_incksum __P((int, u_short *, u_32_t, u_32_t)); 683 extern void ipf_fix_outcksum __P((int, u_short *, u_32_t, u_32_t)); 684 685 extern int ipf_nat_checkin __P((fr_info_t *, u_32_t *)); 686 extern int ipf_nat_checkout __P((fr_info_t *, u_32_t *)); 687 extern void ipf_nat_delete __P((ipf_main_softc_t *, struct nat *, int)); 688 extern void ipf_nat_deref __P((ipf_main_softc_t *, nat_t **)); 689 extern void ipf_nat_expire __P((ipf_main_softc_t *)); 690 extern int ipf_nat_hashtab_add __P((ipf_main_softc_t *, 691 ipf_nat_softc_t *, nat_t *)); 692 extern void ipf_nat_hostmapdel __P((ipf_main_softc_t *, hostmap_t **)); 693 extern int ipf_nat_hostmap_rehash __P((ipf_main_softc_t *, 694 ipftuneable_t *, ipftuneval_t *)); 695 extern nat_t *ipf_nat_icmperrorlookup __P((fr_info_t *, int)); 696 extern nat_t *ipf_nat_icmperror __P((fr_info_t *, u_int *, int)); 697 extern int ipf_nat_init __P((void)); 698 extern nat_t *ipf_nat_inlookup __P((fr_info_t *, u_int, u_int, 699 struct in_addr, struct in_addr)); 700 extern int ipf_nat_in __P((fr_info_t *, nat_t *, int, u_32_t)); 701 extern int ipf_nat_insert __P((ipf_main_softc_t *, ipf_nat_softc_t *, 702 nat_t *)); 703 extern int ipf_nat_ioctl __P((ipf_main_softc_t *, caddr_t, ioctlcmd_t, 704 int, int, void *)); 705 extern void ipf_nat_log __P((ipf_main_softc_t *, ipf_nat_softc_t *, 706 struct nat *, u_int)); 707 extern nat_t *ipf_nat_lookupredir __P((natlookup_t *)); 708 extern nat_t *ipf_nat_maplookup __P((void *, u_int, struct in_addr, 709 struct in_addr)); 710 extern nat_t *ipf_nat_add __P((fr_info_t *, ipnat_t *, nat_t **, 711 u_int, int)); 712 extern int ipf_nat_out __P((fr_info_t *, nat_t *, int, u_32_t)); 713 extern nat_t *ipf_nat_outlookup __P((fr_info_t *, u_int, u_int, 714 struct in_addr, struct in_addr)); 715 extern u_short *ipf_nat_proto __P((fr_info_t *, nat_t *, u_int)); 716 extern void ipf_nat_rule_deref __P((ipf_main_softc_t *, ipnat_t **)); 717 extern void ipf_nat_setqueue __P((ipf_main_softc_t *, ipf_nat_softc_t *, 718 nat_t *)); 719 extern void ipf_nat_setpending __P((ipf_main_softc_t *, nat_t *)); 720 extern nat_t *ipf_nat_tnlookup __P((fr_info_t *, int)); 721 extern void ipf_nat_update __P((fr_info_t *, nat_t *)); 722 extern int ipf_nat_rehash __P((ipf_main_softc_t *, ipftuneable_t *, 723 ipftuneval_t *)); 724 extern int ipf_nat_rehash_rules __P((ipf_main_softc_t *, ipftuneable_t *, 725 ipftuneval_t *)); 726 extern int ipf_nat_settimeout __P((struct ipf_main_softc_s *, 727 ipftuneable_t *, ipftuneval_t *)); 728 extern void ipf_nat_sync __P((ipf_main_softc_t *, void *)); 729 730 extern nat_t *ipf_nat_clone __P((fr_info_t *, nat_t *)); 731 extern void ipf_nat_delmap __P((ipf_nat_softc_t *, ipnat_t *)); 732 extern void ipf_nat_delrdr __P((ipf_nat_softc_t *, ipnat_t *)); 733 extern int ipf_nat_wildok __P((nat_t *, int, int, int, int)); 734 extern void ipf_nat_setlock __P((void *, int)); 735 extern void ipf_nat_load __P((void)); 736 extern void *ipf_nat_soft_create __P((ipf_main_softc_t *)); 737 extern int ipf_nat_soft_init __P((ipf_main_softc_t *, void *)); 738 extern void ipf_nat_soft_destroy __P((ipf_main_softc_t *, void *)); 739 extern int ipf_nat_soft_fini __P((ipf_main_softc_t *, void *)); 740 extern int ipf_nat_main_load __P((void)); 741 extern int ipf_nat_main_unload __P((void)); 742 extern ipftq_t *ipf_nat_add_tq __P((ipf_main_softc_t *, int)); 743 extern void ipf_nat_uncreate __P((fr_info_t *)); 744 745 #ifdef USE_INET6 746 extern nat_t *ipf_nat6_add __P((fr_info_t *, ipnat_t *, nat_t **, 747 u_int, int)); 748 extern void ipf_nat6_addrdr __P((ipf_nat_softc_t *, ipnat_t *)); 749 extern void ipf_nat6_addmap __P((ipf_nat_softc_t *, ipnat_t *)); 750 extern void ipf_nat6_addencap __P((ipf_nat_softc_t *, ipnat_t *)); 751 extern int ipf_nat6_checkout __P((fr_info_t *, u_32_t *)); 752 extern int ipf_nat6_checkin __P((fr_info_t *, u_32_t *)); 753 extern void ipf_nat6_delmap __P((ipf_nat_softc_t *, ipnat_t *)); 754 extern void ipf_nat6_delrdr __P((ipf_nat_softc_t *, ipnat_t *)); 755 extern int ipf_nat6_finalise __P((fr_info_t *, nat_t *)); 756 extern nat_t *ipf_nat6_icmperror __P((fr_info_t *, u_int *, int)); 757 extern nat_t *ipf_nat6_icmperrorlookup __P((fr_info_t *, int)); 758 extern nat_t *ipf_nat6_inlookup __P((fr_info_t *, u_int, u_int, 759 struct in6_addr *, struct in6_addr *)); 760 extern u_32_t ipf_nat6_ip6subtract __P((i6addr_t *, i6addr_t *)); 761 extern frentry_t *ipf_nat6_ipfin __P((fr_info_t *, u_32_t *)); 762 extern frentry_t *ipf_nat6_ipfout __P((fr_info_t *, u_32_t *)); 763 extern nat_t *ipf_nat6_lookupredir __P((natlookup_t *)); 764 extern int ipf_nat6_newmap __P((fr_info_t *, nat_t *, natinfo_t *)); 765 extern int ipf_nat6_newrdr __P((fr_info_t *, nat_t *, natinfo_t *)); 766 extern nat_t *ipf_nat6_outlookup __P((fr_info_t *, u_int, u_int, 767 struct in6_addr *, struct in6_addr *)); 768 extern int ipf_nat6_newrewrite __P((fr_info_t *, nat_t *, natinfo_t *)); 769 extern int ipf_nat6_newdivert __P((fr_info_t *, nat_t *, natinfo_t *)); 770 extern int ipf_nat6_ruleaddrinit __P((ipf_main_softc_t *, ipf_nat_softc_t *, ipnat_t *)); 771 772 #endif 773 774 775 #endif /* __IP_NAT_H__ */ 776