1 2 /* 3 * Copyright (C) 2012 by Darren Reed. 4 * 5 * See the IPFILTER.LICENCE file for details on licencing. 6 * Id: ip_nat.h,v 2.90.2.20 2007/09/25 08:27:32 darrenr Exp $ 7 */ 8 9 #ifndef __IP_NAT_H__ 10 #define __IP_NAT_H__ 11 12 #ifndef SOLARIS 13 # if defined(sun) && defined(__SVR4) 14 # define SOLARIS 1 15 # else 16 # define SOLARIS 0 17 # endif 18 #endif 19 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 26 #undef LARGE_NAT /* define this if you're setting up a system to NAT 27 * LARGE numbers of networks/hosts - i.e. in the 28 * hundreds or thousands. In such a case, you should 29 * also change the RDR_SIZE and NAT_SIZE below to more 30 * appropriate sizes. The figures below were used for 31 * a setup with 1000-2000 networks to NAT. 32 */ 33 #ifdef NAT_SIZE 34 # define NAT_SIZE_LARGE NAT_SIZE 35 # define NAT_SIZE_NORMAL NAT_SIZE 36 #else 37 # define NAT_SIZE_LARGE 2047 38 # define NAT_SIZE_NORMAL 127 39 #endif 40 #ifdef RDR_SIZE 41 # define RDR_SIZE_LARGE RDR_SIZE 42 # define RDR_SIZE_NORMAL RDR_SIZE 43 #else 44 # define RDR_SIZE_LARGE 2047 45 # define RDR_SIZE_NORMAL 127 46 #endif 47 #ifdef HOSTMAP_SIZE 48 # define HOSTMAP_SIZE_LARGE HOSTMAP_SIZE 49 # define HOSTMAP_SIZE_NORMAL HOSTMAP_SIZE 50 #else 51 # define HOSTMAP_SIZE_LARGE 8191 52 # define HOSTMAP_SIZE_NORMAL 2047 53 #endif 54 /* 55 * This is newly introduced and for the sake of "least surprise", the numbers 56 * present aren't what we'd normally use for creating a proper hash table. 57 */ 58 #ifdef NAT_TABLE_MAX 59 # define NAT_TABLE_MAX_LARGE NAT_TABLE_MAX 60 # define NAT_TABLE_MAX_NORMAL NAT_TABLE_MAX 61 #else 62 # define NAT_TABLE_MAX_LARGE 180000 63 # define NAT_TABLE_MAX_NORMAL 30000 64 #endif 65 #ifdef NAT_TABLE_SZ 66 # define NAT_TABLE_SZ_LARGE NAT_TABLE_SZ 67 # define NAT_TABLE_SZ_NORMAL NAT_TABLE_SZ 68 #else 69 # define NAT_TABLE_SZ_LARGE 16383 70 # define NAT_TABLE_SZ_NORMAL 2047 71 #endif 72 #ifndef APR_LABELLEN 73 #define APR_LABELLEN 16 74 #endif 75 #define NAT_HW_CKSUM 0x80000000 76 #define NAT_HW_CKSUM_PART 0x40000000 77 78 #define DEF_NAT_AGE 1200 /* 10 minutes (600 seconds) */ 79 80 struct ipstate; 81 struct ap_session; 82 83 /* 84 * This structure is used in the active NAT table and represents an 85 * active NAT session. 86 */ 87 typedef struct nat { 88 ipfmutex_t nat_lock; 89 struct nat *nat_next; 90 struct nat **nat_pnext; 91 struct nat *nat_hnext[2]; 92 struct nat **nat_phnext[2]; 93 struct hostmap *nat_hm; 94 void *nat_data; 95 struct nat **nat_me; 96 struct ipstate *nat_state; 97 struct ap_session *nat_aps; /* proxy session */ 98 frentry_t *nat_fr; /* filter rule ptr if appropriate */ 99 struct ipnat *nat_ptr; /* pointer back to the rule */ 100 void *nat_ifps[2]; 101 void *nat_sync; 102 ipftqent_t nat_tqe; 103 int nat_mtu[2]; 104 u_32_t nat_flags; 105 u_32_t nat_sumd[2]; /* ip checksum delta for data segment*/ 106 u_32_t nat_ipsumd; /* ip checksum delta for ip header */ 107 u_32_t nat_mssclamp; /* if != zero clamp MSS to this */ 108 i6addr_t nat_odst6; 109 i6addr_t nat_osrc6; 110 i6addr_t nat_ndst6; 111 i6addr_t nat_nsrc6; 112 U_QUAD_T nat_pkts[2]; 113 U_QUAD_T nat_bytes[2]; 114 union { 115 udpinfo_t nat_unu; 116 tcpinfo_t nat_unt; 117 icmpinfo_t nat_uni; 118 greinfo_t nat_ugre; 119 } nat_unold, nat_unnew; 120 int nat_use; 121 int nat_pr[2]; /* protocol for NAT */ 122 int nat_dir; 123 int nat_ref; /* reference count */ 124 u_int nat_hv[2]; 125 char nat_ifnames[2][LIFNAMSIZ]; 126 int nat_rev; /* 0 = forward, 1 = reverse */ 127 int nat_dlocal; 128 int nat_v[2]; /* 0 = old, 1 = new */ 129 u_int nat_redir; /* copy of in_redir */ 130 } nat_t; 131 132 #define nat_osrcip nat_osrc6.in4 133 #define nat_odstip nat_odst6.in4 134 #define nat_nsrcip nat_nsrc6.in4 135 #define nat_ndstip nat_ndst6.in4 136 #define nat_osrcaddr nat_osrc6.in4.s_addr 137 #define nat_odstaddr nat_odst6.in4.s_addr 138 #define nat_nsrcaddr nat_nsrc6.in4.s_addr 139 #define nat_ndstaddr nat_ndst6.in4.s_addr 140 #define nat_age nat_tqe.tqe_die 141 #define nat_osport nat_unold.nat_unt.ts_sport 142 #define nat_odport nat_unold.nat_unt.ts_dport 143 #define nat_nsport nat_unnew.nat_unt.ts_sport 144 #define nat_ndport nat_unnew.nat_unt.ts_dport 145 #define nat_oicmpid nat_unold.nat_uni.ici_id 146 #define nat_nicmpid nat_unnew.nat_uni.ici_id 147 #define nat_type nat_unold.nat_uni.ici_type 148 #define nat_oseq nat_unold.nat_uni.ici_seq 149 #define nat_nseq nat_unnew.nat_uni.ici_seq 150 #define nat_tcpstate nat_tqe.tqe_state 151 #define nat_die nat_tqe.tqe_die 152 #define nat_touched nat_tqe.tqe_touched 153 154 /* 155 * Values for nat_dir 156 */ 157 #define NAT_INBOUND 0 158 #define NAT_OUTBOUND 1 159 #define NAT_ENCAPIN 2 160 #define NAT_ENCAPOUT 3 161 #define NAT_DIVERTIN 4 162 #define NAT_DIVERTOUT 5 163 164 /* 165 * Definitions for nat_flags 166 */ 167 #define NAT_TCP 0x0001 /* IPN_TCP */ 168 #define NAT_UDP 0x0002 /* IPN_UDP */ 169 #define NAT_ICMPERR 0x0004 /* IPN_ICMPERR */ 170 #define NAT_ICMPQUERY 0x0008 /* IPN_ICMPQUERY */ 171 #define NAT_SEARCH 0x0010 172 #define NAT_SLAVE 0x0020 /* Slave connection for a proxy */ 173 #define NAT_NOTRULEPORT 0x0040 /* Don't use the port # in the NAT rule */ 174 175 #define NAT_TCPUDP (NAT_TCP|NAT_UDP) 176 #define NAT_TCPUDPICMP (NAT_TCP|NAT_UDP|NAT_ICMPERR) 177 #define NAT_TCPUDPICMPQ (NAT_TCP|NAT_UDP|NAT_ICMPQUERY) 178 #define NAT_FROMRULE (NAT_TCP|NAT_UDP) 179 180 /* 0x0100 reserved for FI_W_SPORT */ 181 /* 0x0200 reserved for FI_W_DPORT */ 182 /* 0x0400 reserved for FI_W_SADDR */ 183 /* 0x0800 reserved for FI_W_DADDR */ 184 /* 0x1000 reserved for FI_W_NEWFR */ 185 /* 0x2000 reserved for SI_CLONE */ 186 /* 0x4000 reserved for SI_CLONED */ 187 /* 0x8000 reserved for SI_IGNOREPKT */ 188 189 #define NAT_DEBUG 0x800000 190 191 typedef struct nat_addr_s { 192 i6addr_t na_addr[2]; 193 i6addr_t na_nextaddr; 194 int na_atype; 195 int na_function; 196 } nat_addr_t; 197 198 #define na_nextip na_nextaddr.in4.s_addr 199 #define na_nextip6 na_nextaddr.in6 200 #define na_num na_addr[0].iplookupnum 201 #define na_type na_addr[0].iplookuptype 202 #define na_subtype na_addr[0].iplookupsubtype 203 #define na_ptr na_addr[1].iplookupptr 204 #define na_func na_addr[1].iplookupfunc 205 206 207 /* 208 * This structure represents an actual NAT rule, loaded by ipnat. 209 */ 210 typedef struct ipnat { 211 ipfmutex_t in_lock; 212 struct ipnat *in_next; /* NAT rule list next */ 213 struct ipnat **in_pnext; /* prior rdr next ptr */ 214 struct ipnat *in_rnext; /* rdr rule hash next */ 215 struct ipnat **in_prnext; /* prior rdr next ptr */ 216 struct ipnat *in_mnext; /* map rule hash next */ 217 struct ipnat **in_pmnext; /* prior map next ptr */ 218 struct ipftq *in_tqehead[2]; 219 void *in_ifps[2]; 220 void *in_apr; 221 char *in_comment; 222 mb_t *in_divmp; 223 void *in_pconf; 224 U_QUAD_T in_pkts[2]; 225 U_QUAD_T in_bytes[2]; 226 u_long in_space; 227 u_long in_hits; 228 int in_size; 229 int in_use; 230 u_int in_hv[2]; 231 int in_flineno; /* conf. file line number */ 232 int in_stepnext; 233 int in_dlocal; 234 u_short in_dpnext; 235 u_short in_spnext; 236 /* From here to the end is covered by IPN_CMPSIZ */ 237 u_char in_v[2]; /* 0 = old, 1 = new */ 238 u_32_t in_flags; 239 u_32_t in_mssclamp; /* if != 0 clamp MSS to this */ 240 u_int in_age[2]; 241 int in_redir; /* see below for values */ 242 int in_pr[2]; /* protocol. */ 243 nat_addr_t in_ndst; 244 nat_addr_t in_nsrc; 245 nat_addr_t in_osrc; 246 nat_addr_t in_odst; 247 frtuc_t in_tuc; 248 u_short in_ppip; /* ports per IP. */ 249 u_short in_ippip; /* IP #'s per IP# */ 250 u_short in_ndports[2]; 251 u_short in_nsports[2]; 252 int in_ifnames[2]; 253 int in_plabel; /* proxy label. */ 254 int in_pconfig; /* proxy label. */ 255 ipftag_t in_tag; 256 int in_namelen; 257 char in_names[1]; 258 } ipnat_t; 259 260 /* 261 * MAP-IN MAP-OUT RDR-IN RDR-OUT 262 * osrc X == src == src X 263 * odst X == dst == dst X 264 * nsrc == dst X X == dst 265 * ndst == src X X == src 266 */ 267 #define in_dpmin in_ndports[0] /* Also holds static redir port */ 268 #define in_dpmax in_ndports[1] 269 #define in_spmin in_nsports[0] /* Also holds static redir port */ 270 #define in_spmax in_nsports[1] 271 #define in_ndport in_ndports[0] 272 #define in_nsport in_nsports[0] 273 #define in_dipnext in_ndst.na_nextaddr.in4 274 #define in_dipnext6 in_ndst.na_nextaddr 275 #define in_dnip in_ndst.na_nextaddr.in4.s_addr 276 #define in_dnip6 in_ndst.na_nextaddr 277 #define in_sipnext in_nsrc.na_nextaddr.in4 278 #define in_snip in_nsrc.na_nextaddr.in4.s_addr 279 #define in_snip6 in_nsrc.na_nextaddr 280 #define in_odstip in_odst.na_addr[0].in4 281 #define in_odstip6 in_odst.na_addr[0] 282 #define in_odstaddr in_odst.na_addr[0].in4.s_addr 283 #define in_odstmsk in_odst.na_addr[1].in4.s_addr 284 #define in_odstmsk6 in_odst.na_addr[1] 285 #define in_odstatype in_odst.na_atype 286 #define in_osrcip in_osrc.na_addr[0].in4 287 #define in_osrcip6 in_osrc.na_addr[0] 288 #define in_osrcaddr in_osrc.na_addr[0].in4.s_addr 289 #define in_osrcmsk in_osrc.na_addr[1].in4.s_addr 290 #define in_osrcmsk6 in_osrc.na_addr[1] 291 #define in_osrcatype in_osrc.na_atype 292 #define in_ndstip in_ndst.na_addr[0].in4 293 #define in_ndstip6 in_ndst.na_addr[0] 294 #define in_ndstaddr in_ndst.na_addr[0].in4.s_addr 295 #define in_ndstmsk in_ndst.na_addr[1].in4.s_addr 296 #define in_ndstmsk6 in_ndst.na_addr[1] 297 #define in_ndstatype in_ndst.na_atype 298 #define in_ndstafunc in_ndst.na_function 299 #define in_nsrcip in_nsrc.na_addr[0].in4 300 #define in_nsrcip6 in_nsrc.na_addr[0] 301 #define in_nsrcaddr in_nsrc.na_addr[0].in4.s_addr 302 #define in_nsrcmsk in_nsrc.na_addr[1].in4.s_addr 303 #define in_nsrcmsk6 in_nsrc.na_addr[1] 304 #define in_nsrcatype in_nsrc.na_atype 305 #define in_nsrcafunc in_nsrc.na_function 306 #define in_scmp in_tuc.ftu_scmp 307 #define in_dcmp in_tuc.ftu_dcmp 308 #define in_stop in_tuc.ftu_stop 309 #define in_dtop in_tuc.ftu_dtop 310 #define in_osport in_tuc.ftu_sport 311 #define in_odport in_tuc.ftu_dport 312 #define in_ndstnum in_ndst.na_addr[0].iplookupnum 313 #define in_ndsttype in_ndst.na_addr[0].iplookuptype 314 #define in_ndstptr in_ndst.na_addr[1].iplookupptr 315 #define in_ndstfunc in_ndst.na_addr[1].iplookupfunc 316 #define in_nsrcnum in_nsrc.na_addr[0].iplookupnum 317 #define in_nsrctype in_nsrc.na_addr[0].iplookuptype 318 #define in_nsrcptr in_nsrc.na_addr[1].iplookupptr 319 #define in_nsrcfunc in_nsrc.na_addr[1].iplookupfunc 320 #define in_odstnum in_odst.na_addr[0].iplookupnum 321 #define in_odsttype in_odst.na_addr[0].iplookuptype 322 #define in_odstptr in_odst.na_addr[1].iplookupptr 323 #define in_odstfunc in_odst.na_addr[1].iplookupfunc 324 #define in_osrcnum in_osrc.na_addr[0].iplookupnum 325 #define in_osrctype in_osrc.na_addr[0].iplookuptype 326 #define in_osrcptr in_osrc.na_addr[1].iplookupptr 327 #define in_osrcfunc in_osrc.na_addr[1].iplookupfunc 328 #define in_icmpidmin in_nsports[0] 329 #define in_icmpidmax in_nsports[1] 330 331 /* 332 * Bit definitions for in_flags 333 */ 334 #define IPN_ANY 0x00000 335 #define IPN_TCP 0x00001 336 #define IPN_UDP 0x00002 337 #define IPN_TCPUDP (IPN_TCP|IPN_UDP) 338 #define IPN_ICMPERR 0x00004 339 #define IPN_TCPUDPICMP (IPN_TCP|IPN_UDP|IPN_ICMPERR) 340 #define IPN_ICMPQUERY 0x00008 341 #define IPN_TCPUDPICMPQ (IPN_TCP|IPN_UDP|IPN_ICMPQUERY) 342 #define IPN_RF (IPN_TCPUDP|IPN_DELETE|IPN_ICMPERR) 343 #define IPN_AUTOPORTMAP 0x00010 344 #define IPN_FILTER 0x00020 345 #define IPN_SPLIT 0x00040 346 #define IPN_ROUNDR 0x00080 347 #define IPN_SIPRANGE 0x00100 348 #define IPN_DIPRANGE 0x00200 349 #define IPN_NOTSRC 0x00400 350 #define IPN_NOTDST 0x00800 351 #define IPN_NO 0x01000 352 #define IPN_DYNSRCIP 0x02000 /* dynamic src IP# */ 353 #define IPN_DYNDSTIP 0x04000 /* dynamic dst IP# */ 354 #define IPN_DELETE 0x08000 355 #define IPN_STICKY 0x10000 356 #define IPN_FRAG 0x20000 357 #define IPN_FIXEDSPORT 0x40000 358 #define IPN_FIXEDDPORT 0x80000 359 #define IPN_FINDFORWARD 0x100000 360 #define IPN_IN 0x200000 361 #define IPN_SEQUENTIAL 0x400000 362 #define IPN_PURGE 0x800000 363 #define IPN_PROXYRULE 0x1000000 364 #define IPN_USERFLAGS (IPN_TCPUDP|IPN_AUTOPORTMAP|IPN_SIPRANGE|IPN_SPLIT|\ 365 IPN_ROUNDR|IPN_FILTER|IPN_NOTSRC|IPN_NOTDST|IPN_NO|\ 366 IPN_FRAG|IPN_STICKY|IPN_FIXEDDPORT|IPN_ICMPQUERY|\ 367 IPN_DIPRANGE|IPN_SEQUENTIAL|IPN_PURGE) 368 369 /* 370 * Values for in_redir 371 */ 372 #define NAT_MAP 0x01 373 #define NAT_REDIRECT 0x02 374 #define NAT_BIMAP (NAT_MAP|NAT_REDIRECT) 375 #define NAT_MAPBLK 0x04 376 #define NAT_REWRITE 0x08 377 #define NAT_ENCAP 0x10 378 #define NAT_DIVERTUDP 0x20 379 380 #define MAPBLK_MINPORT 1024 /* don't use reserved ports for src port */ 381 #define USABLE_PORTS (65536 - MAPBLK_MINPORT) 382 383 #define IPN_CMPSIZ (sizeof(ipnat_t) - offsetof(ipnat_t, in_v)) 384 385 typedef struct natlookup { 386 i6addr_t nl_inipaddr; 387 i6addr_t nl_outipaddr; 388 i6addr_t nl_realipaddr; 389 int nl_v; 390 int nl_flags; 391 u_short nl_inport; 392 u_short nl_outport; 393 u_short nl_realport; 394 } natlookup_t; 395 396 #define nl_inip nl_inipaddr.in4 397 #define nl_outip nl_outipaddr.in4 398 #define nl_realip nl_realipaddr.in4 399 #define nl_inip6 nl_inipaddr.in6 400 #define nl_outip6 nl_outipaddr.in6 401 #define nl_realip6 nl_realipaddr.in6 402 403 404 typedef struct nat_save { 405 void *ipn_next; 406 struct nat ipn_nat; 407 struct ipnat ipn_ipnat; 408 struct frentry ipn_fr; 409 int ipn_dsize; 410 char ipn_data[4]; 411 } nat_save_t; 412 413 #define ipn_rule ipn_nat.nat_fr 414 415 typedef struct natget { 416 void *ng_ptr; 417 int ng_sz; 418 } natget_t; 419 420 421 /* 422 * This structure gets used to help NAT sessions keep the same NAT rule (and 423 * thus translation for IP address) when: 424 * (a) round-robin redirects are in use 425 * (b) different IP add 426 */ 427 typedef struct hostmap { 428 struct hostmap *hm_hnext; 429 struct hostmap **hm_phnext; 430 struct hostmap *hm_next; 431 struct hostmap **hm_pnext; 432 struct ipnat *hm_ipnat; 433 i6addr_t hm_osrcip6; 434 i6addr_t hm_odstip6; 435 i6addr_t hm_nsrcip6; 436 i6addr_t hm_ndstip6; 437 u_32_t hm_port; 438 int hm_ref; 439 int hm_hv; 440 int hm_v; 441 } hostmap_t; 442 443 #define hm_osrcip hm_osrcip6.in4 444 #define hm_odstip hm_odstip6.in4 445 #define hm_nsrcip hm_nsrcip6.in4 446 #define hm_ndstip hm_ndstip6.in4 447 #define hm_osrc6 hm_osrcip6.in6 448 #define hm_odst6 hm_odstip6.in6 449 #define hm_nsrc6 hm_nsrcip6.in6 450 #define hm_ndst6 hm_ndstip6.in6 451 452 453 /* 454 * Structure used to pass information in to nat_newmap and nat_newrdr. 455 */ 456 typedef struct natinfo { 457 ipnat_t *nai_np; 458 u_32_t nai_sum1; 459 u_32_t nai_sum2; 460 struct in_addr nai_ip; /* In host byte order */ 461 u_short nai_port; 462 u_short nai_nport; 463 u_short nai_sport; 464 u_short nai_dport; 465 } natinfo_t; 466 467 468 typedef struct nat_stat_side { 469 u_int *ns_bucketlen; 470 nat_t **ns_table; 471 u_long ns_added; 472 u_long ns_appr_fail; 473 u_long ns_badnat; 474 u_long ns_badnatnew; 475 u_long ns_badnextaddr; 476 u_long ns_bucket_max; 477 u_long ns_clone_nomem; 478 u_long ns_decap_bad; 479 u_long ns_decap_fail; 480 u_long ns_decap_pullup; 481 u_long ns_divert_dup; 482 u_long ns_divert_exist; 483 u_long ns_drop; 484 u_long ns_encap_dup; 485 u_long ns_encap_pullup; 486 u_long ns_exhausted; 487 u_long ns_icmp_address; 488 u_long ns_icmp_basic; 489 u_long ns_icmp_mbuf; 490 u_long ns_icmp_notfound; 491 u_long ns_icmp_rebuild; 492 u_long ns_icmp_short; 493 u_long ns_icmp_size; 494 u_long ns_ifpaddrfail; 495 u_long ns_ignored; 496 u_long ns_insert_fail; 497 u_long ns_inuse; 498 u_long ns_log; 499 u_long ns_lookup_miss; 500 u_long ns_lookup_nowild; 501 u_long ns_new_ifpaddr; 502 u_long ns_memfail; 503 u_long ns_table_max; 504 u_long ns_translated; 505 u_long ns_unfinalised; 506 u_long ns_wrap; 507 u_long ns_xlate_null; 508 u_long ns_xlate_exists; 509 u_long ns_ipf_proxy_fail; 510 u_long ns_uncreate[2]; 511 } nat_stat_side_t; 512 513 514 typedef struct natstat { 515 nat_t *ns_instances; 516 ipnat_t *ns_list; 517 hostmap_t *ns_maplist; 518 hostmap_t **ns_maptable; 519 u_int ns_active; 520 u_long ns_addtrpnt; 521 u_long ns_divert_build; 522 u_long ns_expire; 523 u_long ns_flush_all; 524 u_long ns_flush_closing; 525 u_long ns_flush_queue; 526 u_long ns_flush_state; 527 u_long ns_flush_timeout; 528 u_long ns_hm_new; 529 u_long ns_hm_newfail; 530 u_long ns_hm_addref; 531 u_long ns_hm_nullnp; 532 u_long ns_log_ok; 533 u_long ns_log_fail; 534 u_int ns_hostmap_sz; 535 u_int ns_nattab_sz; 536 u_int ns_nattab_max; 537 u_int ns_orphans; 538 u_int ns_rules; 539 u_int ns_rules_map; 540 u_int ns_rules_rdr; 541 u_int ns_rultab_sz; 542 u_int ns_rdrtab_sz; 543 u_32_t ns_ticks; 544 u_int ns_trpntab_sz; 545 u_int ns_wilds; 546 u_long ns_proto[256]; 547 nat_stat_side_t ns_side[2]; 548 #ifdef USE_INET6 549 nat_stat_side_t ns_side6[2]; 550 #endif 551 } natstat_t; 552 553 typedef struct natlog { 554 i6addr_t nl_osrcip; 555 i6addr_t nl_odstip; 556 i6addr_t nl_nsrcip; 557 i6addr_t nl_ndstip; 558 u_short nl_osrcport; 559 u_short nl_odstport; 560 u_short nl_nsrcport; 561 u_short nl_ndstport; 562 int nl_action; 563 int nl_type; 564 int nl_rule; 565 U_QUAD_T nl_pkts[2]; 566 U_QUAD_T nl_bytes[2]; 567 u_char nl_p[2]; 568 u_char nl_v[2]; 569 u_char nl_ifnames[2][LIFNAMSIZ]; 570 } natlog_t; 571 572 573 #define NL_NEW 0 574 #define NL_CLONE 1 575 #define NL_PURGE 0xfffc 576 #define NL_DESTROY 0xfffd 577 #define NL_FLUSH 0xfffe 578 #define NL_EXPIRE 0xffff 579 580 #define NAT_HASH_FN(_k,_l,_m) (((_k) + ((_k) >> 12) + _l) % (_m)) 581 #define NAT_HASH_FN6(_k,_l,_m) ((((u_32_t *)(_k))[3] \ 582 + (((u_32_t *)(_k))[3] >> 12) \ 583 + (((u_32_t *)(_k))[2]) \ 584 + (((u_32_t *)(_k))[2] >> 12) \ 585 + (((u_32_t *)(_k))[1]) \ 586 + (((u_32_t *)(_k))[1] >> 12) \ 587 + (((u_32_t *)(_k))[0]) \ 588 + (((u_32_t *)(_k))[0] >> 12) \ 589 + _l) % (_m)) 590 591 #define LONG_SUM(_i) (((_i) & 0xffff) + ((_i) >> 16)) 592 #define LONG_SUM6(_i) (LONG_SUM(ntohl(((u_32_t *)(_i))[0])) + \ 593 LONG_SUM(ntohl(((u_32_t *)(_i))[1])) + \ 594 LONG_SUM(ntohl(((u_32_t *)(_i))[2])) + \ 595 LONG_SUM(ntohl(((u_32_t *)(_i))[3]))) 596 597 #define CALC_SUMD(s1, s2, sd) { \ 598 (s1) = ((s1) & 0xffff) + ((s1) >> 16); \ 599 (s2) = ((s2) & 0xffff) + ((s2) >> 16); \ 600 /* Do it twice */ \ 601 (s1) = ((s1) & 0xffff) + ((s1) >> 16); \ 602 (s2) = ((s2) & 0xffff) + ((s2) >> 16); \ 603 /* Because ~1 == -2, We really need ~1 == -1 */ \ 604 if ((s1) > (s2)) (s2)--; \ 605 (sd) = (s2) - (s1); \ 606 (sd) = ((sd) & 0xffff) + ((sd) >> 16); } 607 608 #define NAT_SYSSPACE 0x80000000 609 #define NAT_LOCKHELD 0x40000000 610 611 /* 612 * This is present in ip_nat.h because it needs to be shared between 613 * ip_nat.c and ip_nat6.c 614 */ 615 typedef struct ipf_nat_softc_s { 616 ipfmutex_t ipf_nat_new; 617 ipfmutex_t ipf_nat_io; 618 int ipf_nat_doflush; 619 int ipf_nat_logging; 620 int ipf_nat_lock; 621 int ipf_nat_inited; 622 int ipf_nat_table_wm_high; 623 int ipf_nat_table_wm_low; 624 u_int ipf_nat_table_max; 625 u_int ipf_nat_table_sz; 626 u_int ipf_nat_maprules_sz; 627 u_int ipf_nat_rdrrules_sz; 628 u_int ipf_nat_hostmap_sz; 629 u_int ipf_nat_maxbucket; 630 u_int ipf_nat_last_force_flush; 631 u_int ipf_nat_defage; 632 u_int ipf_nat_defipage; 633 u_int ipf_nat_deficmpage; 634 ipf_v4_masktab_t ipf_nat_map_mask; 635 ipf_v6_masktab_t ipf_nat6_map_mask; 636 ipf_v4_masktab_t ipf_nat_rdr_mask; 637 ipf_v6_masktab_t ipf_nat6_rdr_mask; 638 nat_t **ipf_nat_table[2]; 639 nat_t *ipf_nat_instances; 640 ipnat_t *ipf_nat_list; 641 ipnat_t **ipf_nat_list_tail; 642 ipnat_t **ipf_nat_map_rules; 643 ipnat_t **ipf_nat_rdr_rules; 644 ipftq_t *ipf_nat_utqe; 645 hostmap_t **ipf_hm_maptable ; 646 hostmap_t *ipf_hm_maplist ; 647 ipftuneable_t *ipf_nat_tune; 648 ipftq_t ipf_nat_udptq; 649 ipftq_t ipf_nat_udpacktq; 650 ipftq_t ipf_nat_icmptq; 651 ipftq_t ipf_nat_icmpacktq; 652 ipftq_t ipf_nat_iptq; 653 ipftq_t ipf_nat_pending; 654 ipftq_t ipf_nat_tcptq[IPF_TCP_NSTATES]; 655 natstat_t ipf_nat_stats; 656 } ipf_nat_softc_t ; 657 658 #define ipf_nat_map_max ipf_nat_map_mask.imt4_max 659 #define ipf_nat_rdr_max ipf_nat_rdr_mask.imt4_max 660 #define ipf_nat6_map_max ipf_nat6_map_mask.imt6_max 661 #define ipf_nat6_rdr_max ipf_nat6_rdr_mask.imt6_max 662 #define ipf_nat_map_active_masks ipf_nat_map_mask.imt4_active 663 #define ipf_nat_rdr_active_masks ipf_nat_rdr_mask.imt4_active 664 #define ipf_nat6_map_active_masks ipf_nat6_map_mask.imt6_active 665 #define ipf_nat6_rdr_active_masks ipf_nat6_rdr_mask.imt6_active 666 667 extern frentry_t ipfnatblock; 668 669 extern void ipf_fix_datacksum(u_short *, u_32_t); 670 extern void ipf_fix_incksum(int, u_short *, u_32_t, u_32_t); 671 extern void ipf_fix_outcksum(int, u_short *, u_32_t, 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 int ipf_nat_hashtab_add(ipf_main_softc_t *, 679 ipf_nat_softc_t *, nat_t *); 680 extern void ipf_nat_hostmapdel(ipf_main_softc_t *, hostmap_t **); 681 extern int ipf_nat_hostmap_rehash(ipf_main_softc_t *, 682 ipftuneable_t *, ipftuneval_t *); 683 extern nat_t *ipf_nat_icmperrorlookup(fr_info_t *, int); 684 extern nat_t *ipf_nat_icmperror(fr_info_t *, u_int *, int); 685 extern int ipf_nat_init(void); 686 extern nat_t *ipf_nat_inlookup(fr_info_t *, u_int, u_int, 687 struct in_addr, struct in_addr); 688 extern int ipf_nat_in(fr_info_t *, nat_t *, int, u_32_t); 689 extern int ipf_nat_insert(ipf_main_softc_t *, ipf_nat_softc_t *, 690 nat_t *); 691 extern int ipf_nat_ioctl(ipf_main_softc_t *, caddr_t, ioctlcmd_t, 692 int, int, void *); 693 extern void ipf_nat_log(ipf_main_softc_t *, ipf_nat_softc_t *, 694 struct nat *, u_int); 695 extern nat_t *ipf_nat_lookupredir(natlookup_t *); 696 extern nat_t *ipf_nat_maplookup(void *, u_int, struct in_addr, 697 struct in_addr); 698 extern nat_t *ipf_nat_add(fr_info_t *, ipnat_t *, nat_t **, 699 u_int, int); 700 extern int ipf_nat_out(fr_info_t *, nat_t *, int, u_32_t); 701 extern nat_t *ipf_nat_outlookup(fr_info_t *, u_int, u_int, 702 struct in_addr, struct in_addr); 703 extern u_short *ipf_nat_proto(fr_info_t *, nat_t *, u_int); 704 extern void ipf_nat_rule_deref(ipf_main_softc_t *, ipnat_t **); 705 extern void ipf_nat_setqueue(ipf_main_softc_t *, ipf_nat_softc_t *, 706 nat_t *); 707 extern void ipf_nat_setpending(ipf_main_softc_t *, nat_t *); 708 extern nat_t *ipf_nat_tnlookup(fr_info_t *, int); 709 extern void ipf_nat_update(fr_info_t *, nat_t *); 710 extern int ipf_nat_rehash(ipf_main_softc_t *, ipftuneable_t *, 711 ipftuneval_t *); 712 extern int ipf_nat_rehash_rules(ipf_main_softc_t *, ipftuneable_t *, 713 ipftuneval_t *); 714 extern int ipf_nat_settimeout(struct ipf_main_softc_s *, 715 ipftuneable_t *, ipftuneval_t *); 716 extern void ipf_nat_sync(ipf_main_softc_t *, void *); 717 718 extern nat_t *ipf_nat_clone(fr_info_t *, nat_t *); 719 extern void ipf_nat_delmap(ipf_nat_softc_t *, ipnat_t *); 720 extern void ipf_nat_delrdr(ipf_nat_softc_t *, ipnat_t *); 721 extern int ipf_nat_wildok(nat_t *, int, int, int, int); 722 extern void ipf_nat_setlock(void *, int); 723 extern void ipf_nat_load(void); 724 extern void *ipf_nat_soft_create(ipf_main_softc_t *); 725 extern int ipf_nat_soft_init(ipf_main_softc_t *, void *); 726 extern void ipf_nat_soft_destroy(ipf_main_softc_t *, void *); 727 extern int ipf_nat_soft_fini(ipf_main_softc_t *, void *); 728 extern int ipf_nat_main_load(void); 729 extern int ipf_nat_main_unload(void); 730 extern ipftq_t *ipf_nat_add_tq(ipf_main_softc_t *, int); 731 extern void ipf_nat_uncreate(fr_info_t *); 732 733 #ifdef USE_INET6 734 extern nat_t *ipf_nat6_add(fr_info_t *, ipnat_t *, nat_t **, 735 u_int, int); 736 extern void ipf_nat6_addrdr(ipf_nat_softc_t *, ipnat_t *); 737 extern void ipf_nat6_addmap(ipf_nat_softc_t *, ipnat_t *); 738 extern void ipf_nat6_addencap(ipf_nat_softc_t *, ipnat_t *); 739 extern int ipf_nat6_checkout(fr_info_t *, u_32_t *); 740 extern int ipf_nat6_checkin(fr_info_t *, u_32_t *); 741 extern void ipf_nat6_delmap(ipf_nat_softc_t *, ipnat_t *); 742 extern void ipf_nat6_delrdr(ipf_nat_softc_t *, ipnat_t *); 743 extern int ipf_nat6_finalise(fr_info_t *, nat_t *); 744 extern nat_t *ipf_nat6_icmperror(fr_info_t *, u_int *, int); 745 extern nat_t *ipf_nat6_icmperrorlookup(fr_info_t *, int); 746 extern nat_t *ipf_nat6_inlookup(fr_info_t *, u_int, u_int, 747 struct in6_addr *, struct in6_addr *); 748 extern u_32_t ipf_nat6_ip6subtract(i6addr_t *, i6addr_t *); 749 extern frentry_t *ipf_nat6_ipfin(fr_info_t *, u_32_t *); 750 extern frentry_t *ipf_nat6_ipfout(fr_info_t *, u_32_t *); 751 extern nat_t *ipf_nat6_lookupredir(natlookup_t *); 752 extern int ipf_nat6_newmap(fr_info_t *, nat_t *, natinfo_t *); 753 extern int ipf_nat6_newrdr(fr_info_t *, nat_t *, natinfo_t *); 754 extern nat_t *ipf_nat6_outlookup(fr_info_t *, u_int, u_int, 755 struct in6_addr *, struct in6_addr *); 756 extern int ipf_nat6_newrewrite(fr_info_t *, nat_t *, natinfo_t *); 757 extern int ipf_nat6_newdivert(fr_info_t *, nat_t *, natinfo_t *); 758 extern int ipf_nat6_ruleaddrinit(ipf_main_softc_t *, ipf_nat_softc_t *, ipnat_t *); 759 760 #endif 761 762 763 #endif /* __IP_NAT_H__ */ 764