1 /*- 2 * Copyright (c) 2002-2009 Luigi Rizzo, Universita` di Pisa 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 * 25 * $FreeBSD$ 26 */ 27 28 #ifndef _IPFW2_PRIVATE_H 29 #define _IPFW2_PRIVATE_H 30 31 /* 32 * Internal constants and data structures used by ipfw components 33 * and not meant to be exported outside the kernel. 34 */ 35 36 #ifdef _KERNEL 37 38 /* 39 * For platforms that do not have SYSCTL support, we wrap the 40 * SYSCTL_* into a function (one per file) to collect the values 41 * into an array at module initialization. The wrapping macros, 42 * SYSBEGIN() and SYSEND, are empty in the default case. 43 */ 44 #ifndef SYSBEGIN 45 #define SYSBEGIN(x) 46 #endif 47 #ifndef SYSEND 48 #define SYSEND 49 #endif 50 51 /* Return values from ipfw_chk() */ 52 enum { 53 IP_FW_PASS = 0, 54 IP_FW_DENY, 55 IP_FW_DIVERT, 56 IP_FW_TEE, 57 IP_FW_DUMMYNET, 58 IP_FW_NETGRAPH, 59 IP_FW_NGTEE, 60 IP_FW_NAT, 61 IP_FW_REASS, 62 }; 63 64 /* 65 * Structure for collecting parameters to dummynet for ip6_output forwarding 66 */ 67 struct _ip6dn_args { 68 struct ip6_pktopts *opt_or; 69 int flags_or; 70 struct ip6_moptions *im6o_or; 71 struct ifnet *origifp_or; 72 struct ifnet *ifp_or; 73 struct sockaddr_in6 dst_or; 74 u_long mtu_or; 75 }; 76 77 78 /* 79 * Arguments for calling ipfw_chk() and dummynet_io(). We put them 80 * all into a structure because this way it is easier and more 81 * efficient to pass variables around and extend the interface. 82 */ 83 struct ip_fw_args { 84 struct mbuf *m; /* the mbuf chain */ 85 struct ifnet *oif; /* output interface */ 86 struct sockaddr_in *next_hop; /* forward address */ 87 struct sockaddr_in6 *next_hop6; /* ipv6 forward address */ 88 89 /* 90 * On return, it points to the matching rule. 91 * On entry, rule.slot > 0 means the info is valid and 92 * contains the starting rule for an ipfw search. 93 * If chain_id == chain->id && slot >0 then jump to that slot. 94 * Otherwise, we locate the first rule >= rulenum:rule_id 95 */ 96 struct ipfw_rule_ref rule; /* match/restart info */ 97 98 struct ether_header *eh; /* for bridged packets */ 99 100 struct ipfw_flow_id f_id; /* grabbed from IP header */ 101 //uint32_t cookie; /* a cookie depending on rule action */ 102 struct inpcb *inp; 103 104 struct _ip6dn_args dummypar; /* dummynet->ip6_output */ 105 union { /* store here if cannot use a pointer */ 106 struct sockaddr_in hopstore; 107 struct sockaddr_in6 hopstore6; 108 }; 109 }; 110 111 MALLOC_DECLARE(M_IPFW); 112 113 /* 114 * Hooks sometime need to know the direction of the packet 115 * (divert, dummynet, netgraph, ...) 116 * We use a generic definition here, with bit0-1 indicating the 117 * direction, bit 2 indicating layer2 or 3, bit 3-4 indicating the 118 * specific protocol 119 * indicating the protocol (if necessary) 120 */ 121 enum { 122 DIR_MASK = 0x3, 123 DIR_OUT = 0, 124 DIR_IN = 1, 125 DIR_FWD = 2, 126 DIR_DROP = 3, 127 PROTO_LAYER2 = 0x4, /* set for layer 2 */ 128 /* PROTO_DEFAULT = 0, */ 129 PROTO_IPV4 = 0x08, 130 PROTO_IPV6 = 0x10, 131 PROTO_IFB = 0x0c, /* layer2 + ifbridge */ 132 /* PROTO_OLDBDG = 0x14, unused, old bridge */ 133 }; 134 135 /* wrapper for freeing a packet, in case we need to do more work */ 136 #ifndef FREE_PKT 137 #if defined(__linux__) || defined(_WIN32) 138 #define FREE_PKT(m) netisr_dispatch(-1, m) 139 #else 140 #define FREE_PKT(m) m_freem(m) 141 #endif 142 #endif /* !FREE_PKT */ 143 144 /* 145 * Function definitions. 146 */ 147 148 /* attach (arg = 1) or detach (arg = 0) hooks */ 149 int ipfw_attach_hooks(int); 150 #ifdef NOTYET 151 void ipfw_nat_destroy(void); 152 #endif 153 154 /* In ip_fw_log.c */ 155 struct ip; 156 struct ip_fw_chain; 157 void ipfw_log_bpf(int); 158 void ipfw_log(struct ip_fw_chain *chain, struct ip_fw *f, u_int hlen, 159 struct ip_fw_args *args, struct mbuf *m, struct ifnet *oif, 160 u_short offset, uint32_t tablearg, struct ip *ip); 161 VNET_DECLARE(u_int64_t, norule_counter); 162 #define V_norule_counter VNET(norule_counter) 163 VNET_DECLARE(int, verbose_limit); 164 #define V_verbose_limit VNET(verbose_limit) 165 166 /* In ip_fw_dynamic.c */ 167 168 enum { /* result for matching dynamic rules */ 169 MATCH_REVERSE = 0, 170 MATCH_FORWARD, 171 MATCH_NONE, 172 MATCH_UNKNOWN, 173 }; 174 175 /* 176 * The lock for dynamic rules is only used once outside the file, 177 * and only to release the result of lookup_dyn_rule(). 178 * Eventually we may implement it with a callback on the function. 179 */ 180 struct ip_fw_chain; 181 struct sockopt_data; 182 int ipfw_is_dyn_rule(struct ip_fw *rule); 183 void ipfw_expire_dyn_rules(struct ip_fw_chain *, ipfw_range_tlv *); 184 void ipfw_dyn_unlock(ipfw_dyn_rule *q); 185 186 struct tcphdr; 187 struct mbuf *ipfw_send_pkt(struct mbuf *, struct ipfw_flow_id *, 188 u_int32_t, u_int32_t, int); 189 int ipfw_install_state(struct ip_fw_chain *chain, struct ip_fw *rule, 190 ipfw_insn_limit *cmd, struct ip_fw_args *args, uint32_t tablearg); 191 ipfw_dyn_rule *ipfw_lookup_dyn_rule(struct ipfw_flow_id *pkt, 192 int *match_direction, struct tcphdr *tcp); 193 void ipfw_remove_dyn_children(struct ip_fw *rule); 194 void ipfw_get_dynamic(struct ip_fw_chain *chain, char **bp, const char *ep); 195 int ipfw_dump_states(struct ip_fw_chain *chain, struct sockopt_data *sd); 196 197 void ipfw_dyn_init(struct ip_fw_chain *); /* per-vnet initialization */ 198 void ipfw_dyn_uninit(int); /* per-vnet deinitialization */ 199 int ipfw_dyn_len(void); 200 int ipfw_dyn_get_count(void); 201 202 /* common variables */ 203 VNET_DECLARE(int, fw_one_pass); 204 #define V_fw_one_pass VNET(fw_one_pass) 205 206 VNET_DECLARE(int, fw_verbose); 207 #define V_fw_verbose VNET(fw_verbose) 208 209 VNET_DECLARE(struct ip_fw_chain, layer3_chain); 210 #define V_layer3_chain VNET(layer3_chain) 211 212 VNET_DECLARE(int, ipfw_vnet_ready); 213 #define V_ipfw_vnet_ready VNET(ipfw_vnet_ready) 214 215 VNET_DECLARE(u_int32_t, set_disable); 216 #define V_set_disable VNET(set_disable) 217 218 VNET_DECLARE(int, autoinc_step); 219 #define V_autoinc_step VNET(autoinc_step) 220 221 VNET_DECLARE(unsigned int, fw_tables_max); 222 #define V_fw_tables_max VNET(fw_tables_max) 223 224 VNET_DECLARE(unsigned int, fw_tables_sets); 225 #define V_fw_tables_sets VNET(fw_tables_sets) 226 227 struct tables_config; 228 229 #ifdef _KERNEL 230 /* 231 * Here we have the structure representing an ipfw rule. 232 * 233 * It starts with a general area 234 * followed by an array of one or more instructions, which the code 235 * accesses as an array of 32-bit values. 236 * 237 * Given a rule pointer r: 238 * 239 * r->cmd is the start of the first instruction. 240 * ACTION_PTR(r) is the start of the first action (things to do 241 * once a rule matched). 242 */ 243 244 struct ip_fw { 245 uint16_t act_ofs; /* offset of action in 32-bit units */ 246 uint16_t cmd_len; /* # of 32-bit words in cmd */ 247 uint16_t rulenum; /* rule number */ 248 uint8_t set; /* rule set (0..31) */ 249 uint8_t flags; /* currently unused */ 250 counter_u64_t cntr; /* Pointer to rule counters */ 251 uint32_t timestamp; /* tv_sec of last match */ 252 uint32_t id; /* rule id */ 253 uint32_t cached_id; /* used by jump_fast */ 254 uint32_t cached_pos; /* used by jump_fast */ 255 256 ipfw_insn cmd[1]; /* storage for commands */ 257 }; 258 259 #define IPFW_RULE_CNTR_SIZE (2 * sizeof(counter_u64_t)) 260 261 #endif 262 263 struct ip_fw_chain { 264 struct ip_fw **map; /* array of rule ptrs to ease lookup */ 265 uint32_t id; /* ruleset id */ 266 int n_rules; /* number of static rules */ 267 LIST_HEAD(nat_list, cfg_nat) nat; /* list of nat entries */ 268 void *tablestate; /* runtime table info */ 269 void *valuestate; /* runtime table value info */ 270 int *idxmap; /* skipto array of rules */ 271 #if defined( __linux__ ) || defined( _WIN32 ) 272 spinlock_t rwmtx; 273 #else 274 struct rmlock rwmtx; 275 #endif 276 int static_len; /* total len of static rules (v0) */ 277 uint32_t gencnt; /* NAT generation count */ 278 struct ip_fw *default_rule; 279 struct tables_config *tblcfg; /* tables module data */ 280 void *ifcfg; /* interface module data */ 281 int *idxmap_back; /* standby skipto array of rules */ 282 #if defined( __linux__ ) || defined( _WIN32 ) 283 spinlock_t uh_lock; 284 #else 285 struct rwlock uh_lock; /* lock for upper half */ 286 #endif 287 }; 288 289 /* 64-byte structure representing multi-field table value */ 290 struct table_value { 291 uint32_t tag; /* O_TAG/O_TAGGED */ 292 uint32_t pipe; /* O_PIPE/O_QUEUE */ 293 uint16_t divert; /* O_DIVERT/O_TEE */ 294 uint16_t skipto; /* skipto, CALLRET */ 295 uint32_t netgraph; /* O_NETGRAPH/O_NGTEE */ 296 uint32_t fib; /* O_SETFIB */ 297 uint32_t nat; /* O_NAT */ 298 uint32_t nh4; 299 uint8_t dscp; 300 uint8_t spare0; 301 uint16_t spare1; 302 /* -- 32 bytes -- */ 303 struct in6_addr nh6; 304 uint32_t limit; /* O_LIMIT */ 305 uint32_t zoneid; /* scope zone id for nh6 */ 306 uint64_t refcnt; /* Number of references */ 307 }; 308 309 struct namedobj_instance; 310 311 struct named_object { 312 TAILQ_ENTRY(named_object) nn_next; /* namehash */ 313 TAILQ_ENTRY(named_object) nv_next; /* valuehash */ 314 char *name; /* object name */ 315 uint8_t type; /* object type */ 316 uint8_t compat; /* Object name is number */ 317 uint16_t kidx; /* object kernel index */ 318 uint16_t uidx; /* userland idx for compat records */ 319 uint32_t set; /* set object belongs to */ 320 uint32_t refcnt; /* number of references */ 321 }; 322 TAILQ_HEAD(namedobjects_head, named_object); 323 324 struct sockopt; /* used by tcp_var.h */ 325 struct sockopt_data { 326 caddr_t kbuf; /* allocated buffer */ 327 size_t ksize; /* given buffer size */ 328 size_t koff; /* data already used */ 329 size_t kavail; /* number of bytes available */ 330 size_t ktotal; /* total bytes pushed */ 331 struct sockopt *sopt; /* socket data */ 332 caddr_t sopt_val; /* sopt user buffer */ 333 size_t valsize; /* original data size */ 334 }; 335 336 struct ipfw_ifc; 337 338 typedef void (ipfw_ifc_cb)(struct ip_fw_chain *ch, void *cbdata, 339 uint16_t ifindex); 340 341 struct ipfw_iface { 342 struct named_object no; 343 char ifname[64]; 344 int resolved; 345 uint16_t ifindex; 346 uint16_t spare; 347 uint64_t gencnt; 348 TAILQ_HEAD(, ipfw_ifc) consumers; 349 }; 350 351 struct ipfw_ifc { 352 TAILQ_ENTRY(ipfw_ifc) next; 353 struct ipfw_iface *iface; 354 ipfw_ifc_cb *cb; 355 void *cbdata; 356 }; 357 358 /* Macro for working with various counters */ 359 #define IPFW_INC_RULE_COUNTER(_cntr, _bytes) do { \ 360 counter_u64_add((_cntr)->cntr, 1); \ 361 counter_u64_add((_cntr)->cntr + 1, _bytes); \ 362 if ((_cntr)->timestamp != time_uptime) \ 363 (_cntr)->timestamp = time_uptime; \ 364 } while (0) 365 366 #define IPFW_INC_DYN_COUNTER(_cntr, _bytes) do { \ 367 (_cntr)->pcnt++; \ 368 (_cntr)->bcnt += _bytes; \ 369 } while (0) 370 371 #define IPFW_ZERO_RULE_COUNTER(_cntr) do { \ 372 counter_u64_zero((_cntr)->cntr); \ 373 counter_u64_zero((_cntr)->cntr + 1); \ 374 (_cntr)->timestamp = 0; \ 375 } while (0) 376 377 #define IPFW_ZERO_DYN_COUNTER(_cntr) do { \ 378 (_cntr)->pcnt = 0; \ 379 (_cntr)->bcnt = 0; \ 380 } while (0) 381 382 #define TARG_VAL(ch, k, f) ((struct table_value *)((ch)->valuestate))[k].f 383 #define IP_FW_ARG_TABLEARG(ch, a, f) \ 384 (((a) == IP_FW_TARG) ? TARG_VAL(ch, tablearg, f) : (a)) 385 /* 386 * The lock is heavily used by ip_fw2.c (the main file) and ip_fw_nat.c 387 * so the variable and the macros must be here. 388 */ 389 390 #if defined( __linux__ ) || defined( _WIN32 ) 391 #define IPFW_LOCK_INIT(_chain) do { \ 392 rw_init(&(_chain)->rwmtx, "IPFW static rules"); \ 393 rw_init(&(_chain)->uh_lock, "IPFW UH lock"); \ 394 } while (0) 395 396 #define IPFW_LOCK_DESTROY(_chain) do { \ 397 rw_destroy(&(_chain)->rwmtx); \ 398 rw_destroy(&(_chain)->uh_lock); \ 399 } while (0) 400 401 #define IPFW_RLOCK_ASSERT(_chain) rw_assert(&(_chain)->rwmtx, RA_RLOCKED) 402 #define IPFW_WLOCK_ASSERT(_chain) rw_assert(&(_chain)->rwmtx, RA_WLOCKED) 403 404 #define IPFW_RLOCK_TRACKER 405 #define IPFW_RLOCK(p) rw_rlock(&(p)->rwmtx) 406 #define IPFW_RUNLOCK(p) rw_runlock(&(p)->rwmtx) 407 #define IPFW_WLOCK(p) rw_wlock(&(p)->rwmtx) 408 #define IPFW_WUNLOCK(p) rw_wunlock(&(p)->rwmtx) 409 #define IPFW_PF_RLOCK(p) IPFW_RLOCK(p) 410 #define IPFW_PF_RUNLOCK(p) IPFW_RUNLOCK(p) 411 #else /* FreeBSD */ 412 #define IPFW_LOCK_INIT(_chain) do { \ 413 rm_init(&(_chain)->rwmtx, "IPFW static rules"); \ 414 rw_init(&(_chain)->uh_lock, "IPFW UH lock"); \ 415 } while (0) 416 417 #define IPFW_LOCK_DESTROY(_chain) do { \ 418 rm_destroy(&(_chain)->rwmtx); \ 419 rw_destroy(&(_chain)->uh_lock); \ 420 } while (0) 421 422 #define IPFW_RLOCK_ASSERT(_chain) rm_assert(&(_chain)->rwmtx, RA_RLOCKED) 423 #define IPFW_WLOCK_ASSERT(_chain) rm_assert(&(_chain)->rwmtx, RA_WLOCKED) 424 425 #define IPFW_RLOCK_TRACKER struct rm_priotracker _tracker 426 #define IPFW_RLOCK(p) rm_rlock(&(p)->rwmtx, &_tracker) 427 #define IPFW_RUNLOCK(p) rm_runlock(&(p)->rwmtx, &_tracker) 428 #define IPFW_WLOCK(p) rm_wlock(&(p)->rwmtx) 429 #define IPFW_WUNLOCK(p) rm_wunlock(&(p)->rwmtx) 430 #define IPFW_PF_RLOCK(p) IPFW_RLOCK(p) 431 #define IPFW_PF_RUNLOCK(p) IPFW_RUNLOCK(p) 432 #endif 433 434 #define IPFW_UH_RLOCK_ASSERT(_chain) rw_assert(&(_chain)->uh_lock, RA_RLOCKED) 435 #define IPFW_UH_WLOCK_ASSERT(_chain) rw_assert(&(_chain)->uh_lock, RA_WLOCKED) 436 #define IPFW_UH_UNLOCK_ASSERT(_chain) rw_assert(&(_chain)->uh_lock, RA_UNLOCKED) 437 438 #define IPFW_UH_RLOCK(p) rw_rlock(&(p)->uh_lock) 439 #define IPFW_UH_RUNLOCK(p) rw_runlock(&(p)->uh_lock) 440 #define IPFW_UH_WLOCK(p) rw_wlock(&(p)->uh_lock) 441 #define IPFW_UH_WUNLOCK(p) rw_wunlock(&(p)->uh_lock) 442 443 struct obj_idx { 444 uint16_t uidx; /* internal index supplied by userland */ 445 uint16_t kidx; /* kernel object index */ 446 uint16_t off; /* tlv offset from rule end in 4-byte words */ 447 uint8_t spare; 448 uint8_t type; /* object type within its category */ 449 }; 450 451 struct rule_check_info { 452 uint16_t flags; /* rule-specific check flags */ 453 uint16_t table_opcodes; /* count of opcodes referencing table */ 454 uint16_t urule_numoff; /* offset of rulenum in bytes */ 455 uint8_t version; /* rule version */ 456 uint8_t spare; 457 ipfw_obj_ctlv *ctlv; /* name TLV containter */ 458 struct ip_fw *krule; /* resulting rule pointer */ 459 caddr_t urule; /* original rule pointer */ 460 struct obj_idx obuf[8]; /* table references storage */ 461 }; 462 463 /* Legacy interface support */ 464 /* 465 * FreeBSD 8 export rule format 466 */ 467 struct ip_fw_rule0 { 468 struct ip_fw *x_next; /* linked list of rules */ 469 struct ip_fw *next_rule; /* ptr to next [skipto] rule */ 470 /* 'next_rule' is used to pass up 'set_disable' status */ 471 472 uint16_t act_ofs; /* offset of action in 32-bit units */ 473 uint16_t cmd_len; /* # of 32-bit words in cmd */ 474 uint16_t rulenum; /* rule number */ 475 uint8_t set; /* rule set (0..31) */ 476 uint8_t _pad; /* padding */ 477 uint32_t id; /* rule id */ 478 479 /* These fields are present in all rules. */ 480 uint64_t pcnt; /* Packet counter */ 481 uint64_t bcnt; /* Byte counter */ 482 uint32_t timestamp; /* tv_sec of last match */ 483 484 ipfw_insn cmd[1]; /* storage for commands */ 485 }; 486 487 struct ip_fw_bcounter0 { 488 uint64_t pcnt; /* Packet counter */ 489 uint64_t bcnt; /* Byte counter */ 490 uint32_t timestamp; /* tv_sec of last match */ 491 }; 492 493 /* Kernel rule length */ 494 /* 495 * RULE _K_ SIZE _V_ -> 496 * get kernel size from userland rool version _V_. 497 * RULE _U_ SIZE _V_ -> 498 * get user size version _V_ from kernel rule 499 * RULESIZE _V_ -> 500 * get user size rule length 501 */ 502 /* FreeBSD8 <> current kernel format */ 503 #define RULEUSIZE0(r) (sizeof(struct ip_fw_rule0) + (r)->cmd_len * 4 - 4) 504 #define RULEKSIZE0(r) roundup2((sizeof(struct ip_fw) + (r)->cmd_len*4 - 4), 8) 505 /* FreeBSD11 <> current kernel format */ 506 #define RULEUSIZE1(r) (roundup2(sizeof(struct ip_fw_rule) + \ 507 (r)->cmd_len * 4 - 4, 8)) 508 #define RULEKSIZE1(r) roundup2((sizeof(struct ip_fw) + (r)->cmd_len*4 - 4), 8) 509 510 511 /* In ip_fw_iface.c */ 512 int ipfw_iface_init(void); 513 void ipfw_iface_destroy(void); 514 void vnet_ipfw_iface_destroy(struct ip_fw_chain *ch); 515 int ipfw_iface_ref(struct ip_fw_chain *ch, char *name, 516 struct ipfw_ifc *ic); 517 void ipfw_iface_unref(struct ip_fw_chain *ch, struct ipfw_ifc *ic); 518 void ipfw_iface_add_notify(struct ip_fw_chain *ch, struct ipfw_ifc *ic); 519 void ipfw_iface_del_notify(struct ip_fw_chain *ch, struct ipfw_ifc *ic); 520 521 /* In ip_fw_sockopt.c */ 522 void ipfw_init_skipto_cache(struct ip_fw_chain *chain); 523 void ipfw_destroy_skipto_cache(struct ip_fw_chain *chain); 524 int ipfw_find_rule(struct ip_fw_chain *chain, uint32_t key, uint32_t id); 525 int ipfw_ctl3(struct sockopt *sopt); 526 int ipfw_chk(struct ip_fw_args *args); 527 void ipfw_reap_add(struct ip_fw_chain *chain, struct ip_fw **head, 528 struct ip_fw *rule); 529 void ipfw_reap_rules(struct ip_fw *head); 530 void ipfw_init_counters(void); 531 void ipfw_destroy_counters(void); 532 struct ip_fw *ipfw_alloc_rule(struct ip_fw_chain *chain, size_t rulesize); 533 int ipfw_match_range(struct ip_fw *rule, ipfw_range_tlv *rt); 534 535 typedef int (sopt_handler_f)(struct ip_fw_chain *ch, 536 ip_fw3_opheader *op3, struct sockopt_data *sd); 537 struct ipfw_sopt_handler { 538 uint16_t opcode; 539 uint8_t version; 540 uint8_t dir; 541 sopt_handler_f *handler; 542 uint64_t refcnt; 543 }; 544 #define HDIR_SET 0x01 /* Handler is used to set some data */ 545 #define HDIR_GET 0x02 /* Handler is used to retrieve data */ 546 #define HDIR_BOTH HDIR_GET|HDIR_SET 547 548 void ipfw_init_sopt_handler(void); 549 void ipfw_destroy_sopt_handler(void); 550 void ipfw_add_sopt_handler(struct ipfw_sopt_handler *sh, size_t count); 551 int ipfw_del_sopt_handler(struct ipfw_sopt_handler *sh, size_t count); 552 caddr_t ipfw_get_sopt_space(struct sockopt_data *sd, size_t needed); 553 caddr_t ipfw_get_sopt_header(struct sockopt_data *sd, size_t needed); 554 #define IPFW_ADD_SOPT_HANDLER(f, c) do { \ 555 if ((f) != 0) \ 556 ipfw_add_sopt_handler(c, \ 557 sizeof(c) / sizeof(c[0])); \ 558 } while(0) 559 #define IPFW_DEL_SOPT_HANDLER(l, c) do { \ 560 if ((l) != 0) \ 561 ipfw_del_sopt_handler(c, \ 562 sizeof(c) / sizeof(c[0])); \ 563 } while(0) 564 565 typedef void (objhash_cb_t)(struct namedobj_instance *ni, struct named_object *, 566 void *arg); 567 typedef uint32_t (objhash_hash_f)(struct namedobj_instance *ni, void *key, 568 uint32_t kopt); 569 typedef int (objhash_cmp_f)(struct named_object *no, void *key, uint32_t kopt); 570 struct namedobj_instance *ipfw_objhash_create(uint32_t items); 571 void ipfw_objhash_destroy(struct namedobj_instance *); 572 void ipfw_objhash_bitmap_alloc(uint32_t items, void **idx, int *pblocks); 573 void ipfw_objhash_bitmap_merge(struct namedobj_instance *ni, 574 void **idx, int *blocks); 575 void ipfw_objhash_bitmap_swap(struct namedobj_instance *ni, 576 void **idx, int *blocks); 577 void ipfw_objhash_bitmap_free(void *idx, int blocks); 578 void ipfw_objhash_set_hashf(struct namedobj_instance *ni, objhash_hash_f *f); 579 struct named_object *ipfw_objhash_lookup_name(struct namedobj_instance *ni, 580 uint32_t set, char *name); 581 struct named_object *ipfw_objhash_lookup_kidx(struct namedobj_instance *ni, 582 uint16_t idx); 583 int ipfw_objhash_same_name(struct namedobj_instance *ni, struct named_object *a, 584 struct named_object *b); 585 void ipfw_objhash_add(struct namedobj_instance *ni, struct named_object *no); 586 void ipfw_objhash_del(struct namedobj_instance *ni, struct named_object *no); 587 uint32_t ipfw_objhash_count(struct namedobj_instance *ni); 588 void ipfw_objhash_foreach(struct namedobj_instance *ni, objhash_cb_t *f, 589 void *arg); 590 int ipfw_objhash_free_idx(struct namedobj_instance *ni, uint16_t idx); 591 int ipfw_objhash_alloc_idx(void *n, uint16_t *pidx); 592 void ipfw_objhash_set_funcs(struct namedobj_instance *ni, 593 objhash_hash_f *hash_f, objhash_cmp_f *cmp_f); 594 595 /* In ip_fw_table.c */ 596 struct table_info; 597 598 typedef int (table_lookup_t)(struct table_info *ti, void *key, uint32_t keylen, 599 uint32_t *val); 600 601 int ipfw_lookup_table(struct ip_fw_chain *ch, uint16_t tbl, in_addr_t addr, 602 uint32_t *val); 603 int ipfw_lookup_table_extended(struct ip_fw_chain *ch, uint16_t tbl, uint16_t plen, 604 void *paddr, uint32_t *val); 605 int ipfw_init_tables(struct ip_fw_chain *ch, int first); 606 int ipfw_resize_tables(struct ip_fw_chain *ch, unsigned int ntables); 607 int ipfw_switch_tables_namespace(struct ip_fw_chain *ch, unsigned int nsets); 608 void ipfw_destroy_tables(struct ip_fw_chain *ch, int last); 609 610 /* In ip_fw_nat.c -- XXX to be moved to ip_var.h */ 611 612 extern struct cfg_nat *(*lookup_nat_ptr)(struct nat_list *, int); 613 614 typedef int ipfw_nat_t(struct ip_fw_args *, struct cfg_nat *, struct mbuf *); 615 typedef int ipfw_nat_cfg_t(struct sockopt *); 616 617 VNET_DECLARE(int, ipfw_nat_ready); 618 #define V_ipfw_nat_ready VNET(ipfw_nat_ready) 619 #define IPFW_NAT_LOADED (V_ipfw_nat_ready) 620 621 extern ipfw_nat_t *ipfw_nat_ptr; 622 extern ipfw_nat_cfg_t *ipfw_nat_cfg_ptr; 623 extern ipfw_nat_cfg_t *ipfw_nat_del_ptr; 624 extern ipfw_nat_cfg_t *ipfw_nat_get_cfg_ptr; 625 extern ipfw_nat_cfg_t *ipfw_nat_get_log_ptr; 626 627 #endif /* _KERNEL */ 628 #endif /* _IPFW2_PRIVATE_H */ 629