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 struct route_in6 ro_or; 70 int flags_or; 71 struct ip6_moptions *im6o_or; 72 struct ifnet *origifp_or; 73 struct ifnet *ifp_or; 74 struct sockaddr_in6 dst_or; 75 u_long mtu_or; 76 struct route_in6 ro_pmtu_or; 77 }; 78 79 80 /* 81 * Arguments for calling ipfw_chk() and dummynet_io(). We put them 82 * all into a structure because this way it is easier and more 83 * efficient to pass variables around and extend the interface. 84 */ 85 struct ip_fw_args { 86 struct mbuf *m; /* the mbuf chain */ 87 struct ifnet *oif; /* output interface */ 88 struct sockaddr_in *next_hop; /* forward address */ 89 struct sockaddr_in6 *next_hop6; /* ipv6 forward address */ 90 91 /* 92 * On return, it points to the matching rule. 93 * On entry, rule.slot > 0 means the info is valid and 94 * contains the starting rule for an ipfw search. 95 * If chain_id == chain->id && slot >0 then jump to that slot. 96 * Otherwise, we locate the first rule >= rulenum:rule_id 97 */ 98 struct ipfw_rule_ref rule; /* match/restart info */ 99 100 struct ether_header *eh; /* for bridged packets */ 101 102 struct ipfw_flow_id f_id; /* grabbed from IP header */ 103 //uint32_t cookie; /* a cookie depending on rule action */ 104 struct inpcb *inp; 105 106 struct _ip6dn_args dummypar; /* dummynet->ip6_output */ 107 struct sockaddr_in hopstore; /* store here if cannot use a pointer */ 108 }; 109 110 MALLOC_DECLARE(M_IPFW); 111 112 /* 113 * Hooks sometime need to know the direction of the packet 114 * (divert, dummynet, netgraph, ...) 115 * We use a generic definition here, with bit0-1 indicating the 116 * direction, bit 2 indicating layer2 or 3, bit 3-4 indicating the 117 * specific protocol 118 * indicating the protocol (if necessary) 119 */ 120 enum { 121 DIR_MASK = 0x3, 122 DIR_OUT = 0, 123 DIR_IN = 1, 124 DIR_FWD = 2, 125 DIR_DROP = 3, 126 PROTO_LAYER2 = 0x4, /* set for layer 2 */ 127 /* PROTO_DEFAULT = 0, */ 128 PROTO_IPV4 = 0x08, 129 PROTO_IPV6 = 0x10, 130 PROTO_IFB = 0x0c, /* layer2 + ifbridge */ 131 /* PROTO_OLDBDG = 0x14, unused, old bridge */ 132 }; 133 134 /* wrapper for freeing a packet, in case we need to do more work */ 135 #ifndef FREE_PKT 136 #if defined(__linux__) || defined(_WIN32) 137 #define FREE_PKT(m) netisr_dispatch(-1, m) 138 #else 139 #define FREE_PKT(m) m_freem(m) 140 #endif 141 #endif /* !FREE_PKT */ 142 143 /* 144 * Function definitions. 145 */ 146 147 /* attach (arg = 1) or detach (arg = 0) hooks */ 148 int ipfw_attach_hooks(int); 149 #ifdef NOTYET 150 void ipfw_nat_destroy(void); 151 #endif 152 153 /* In ip_fw_log.c */ 154 struct ip; 155 struct ip_fw_chain; 156 void ipfw_log_bpf(int); 157 void ipfw_log(struct ip_fw_chain *chain, struct ip_fw *f, u_int hlen, 158 struct ip_fw_args *args, struct mbuf *m, struct ifnet *oif, 159 u_short offset, uint32_t tablearg, struct ip *ip); 160 VNET_DECLARE(u_int64_t, norule_counter); 161 #define V_norule_counter VNET(norule_counter) 162 VNET_DECLARE(int, verbose_limit); 163 #define V_verbose_limit VNET(verbose_limit) 164 165 /* In ip_fw_dynamic.c */ 166 167 enum { /* result for matching dynamic rules */ 168 MATCH_REVERSE = 0, 169 MATCH_FORWARD, 170 MATCH_NONE, 171 MATCH_UNKNOWN, 172 }; 173 174 /* 175 * The lock for dynamic rules is only used once outside the file, 176 * and only to release the result of lookup_dyn_rule(). 177 * Eventually we may implement it with a callback on the function. 178 */ 179 struct ip_fw_chain; 180 struct sockopt_data; 181 int ipfw_is_dyn_rule(struct ip_fw *rule); 182 void ipfw_expire_dyn_rules(struct ip_fw_chain *, ipfw_range_tlv *); 183 void ipfw_dyn_unlock(ipfw_dyn_rule *q); 184 185 struct tcphdr; 186 struct mbuf *ipfw_send_pkt(struct mbuf *, struct ipfw_flow_id *, 187 u_int32_t, u_int32_t, int); 188 int ipfw_install_state(struct ip_fw_chain *chain, struct ip_fw *rule, 189 ipfw_insn_limit *cmd, struct ip_fw_args *args, uint32_t tablearg); 190 ipfw_dyn_rule *ipfw_lookup_dyn_rule(struct ipfw_flow_id *pkt, 191 int *match_direction, struct tcphdr *tcp); 192 void ipfw_remove_dyn_children(struct ip_fw *rule); 193 void ipfw_get_dynamic(struct ip_fw_chain *chain, char **bp, const char *ep); 194 int ipfw_dump_states(struct ip_fw_chain *chain, struct sockopt_data *sd); 195 196 void ipfw_dyn_init(struct ip_fw_chain *); /* per-vnet initialization */ 197 void ipfw_dyn_uninit(int); /* per-vnet deinitialization */ 198 int ipfw_dyn_len(void); 199 int ipfw_dyn_get_count(void); 200 201 /* common variables */ 202 VNET_DECLARE(int, fw_one_pass); 203 #define V_fw_one_pass VNET(fw_one_pass) 204 205 VNET_DECLARE(int, fw_verbose); 206 #define V_fw_verbose VNET(fw_verbose) 207 208 VNET_DECLARE(struct ip_fw_chain, layer3_chain); 209 #define V_layer3_chain VNET(layer3_chain) 210 211 VNET_DECLARE(int, ipfw_vnet_ready); 212 #define V_ipfw_vnet_ready VNET(ipfw_vnet_ready) 213 214 VNET_DECLARE(u_int32_t, set_disable); 215 #define V_set_disable VNET(set_disable) 216 217 VNET_DECLARE(int, autoinc_step); 218 #define V_autoinc_step VNET(autoinc_step) 219 220 VNET_DECLARE(unsigned int, fw_tables_max); 221 #define V_fw_tables_max VNET(fw_tables_max) 222 223 VNET_DECLARE(unsigned int, fw_tables_sets); 224 #define V_fw_tables_sets VNET(fw_tables_sets) 225 226 struct tables_config; 227 228 #ifdef _KERNEL 229 typedef struct ip_fw_cntr { 230 uint64_t pcnt; /* Packet counter */ 231 uint64_t bcnt; /* Byte counter */ 232 uint64_t timestamp; /* tv_sec of last match */ 233 } ip_fw_cntr; 234 235 /* 236 * Here we have the structure representing an ipfw rule. 237 * 238 * It starts with a general area 239 * followed by an array of one or more instructions, which the code 240 * accesses as an array of 32-bit values. 241 * 242 * Given a rule pointer r: 243 * 244 * r->cmd is the start of the first instruction. 245 * ACTION_PTR(r) is the start of the first action (things to do 246 * once a rule matched). 247 */ 248 249 struct ip_fw { 250 uint16_t act_ofs; /* offset of action in 32-bit units */ 251 uint16_t cmd_len; /* # of 32-bit words in cmd */ 252 uint16_t rulenum; /* rule number */ 253 uint8_t set; /* rule set (0..31) */ 254 uint8_t flags; /* currently unused */ 255 counter_u64_t cntr; /* Pointer to rule counters */ 256 uint32_t timestamp; /* tv_sec of last match */ 257 uint32_t id; /* rule id */ 258 uint32_t cached_id; /* used by jump_fast */ 259 uint32_t cached_pos; /* used by jump_fast */ 260 261 ipfw_insn cmd[1]; /* storage for commands */ 262 }; 263 264 #endif 265 266 struct ip_fw_chain { 267 struct ip_fw **map; /* array of rule ptrs to ease lookup */ 268 uint32_t id; /* ruleset id */ 269 int n_rules; /* number of static rules */ 270 LIST_HEAD(nat_list, cfg_nat) nat; /* list of nat entries */ 271 void *tablestate; /* runtime table info */ 272 void *valuestate; /* runtime table value info */ 273 int *idxmap; /* skipto array of rules */ 274 #if defined( __linux__ ) || defined( _WIN32 ) 275 spinlock_t rwmtx; 276 #else 277 struct rmlock rwmtx; 278 #endif 279 int static_len; /* total len of static rules (v0) */ 280 uint32_t gencnt; /* NAT generation count */ 281 struct ip_fw *default_rule; 282 struct tables_config *tblcfg; /* tables module data */ 283 void *ifcfg; /* interface module data */ 284 int *idxmap_back; /* standby skipto array of rules */ 285 #if defined( __linux__ ) || defined( _WIN32 ) 286 spinlock_t uh_lock; 287 #else 288 struct rwlock uh_lock; /* lock for upper half */ 289 #endif 290 }; 291 292 /* 64-byte structure representing multi-field table value */ 293 struct table_value { 294 uint32_t tag; /* O_TAG/O_TAGGED */ 295 uint32_t pipe; /* O_PIPE/O_QUEUE */ 296 uint16_t divert; /* O_DIVERT/O_TEE */ 297 uint16_t skipto; /* skipto, CALLRET */ 298 uint32_t netgraph; /* O_NETGRAPH/O_NGTEE */ 299 uint32_t fib; /* O_SETFIB */ 300 uint32_t nat; /* O_NAT */ 301 uint32_t nh4; 302 uint8_t dscp; 303 uint8_t spare0[3]; 304 /* -- 32 bytes -- */ 305 struct in6_addr nh6; 306 uint32_t limit; /* O_LIMIT */ 307 uint32_t spare1; 308 uint64_t refcnt; /* Number of references */ 309 }; 310 311 struct namedobj_instance; 312 313 struct named_object { 314 TAILQ_ENTRY(named_object) nn_next; /* namehash */ 315 TAILQ_ENTRY(named_object) nv_next; /* valuehash */ 316 char *name; /* object name */ 317 uint8_t type; /* object type */ 318 uint8_t compat; /* Object name is number */ 319 uint16_t kidx; /* object kernel index */ 320 uint16_t uidx; /* userland idx for compat records */ 321 uint32_t set; /* set object belongs to */ 322 uint32_t refcnt; /* number of references */ 323 }; 324 TAILQ_HEAD(namedobjects_head, named_object); 325 326 struct sockopt; /* used by tcp_var.h */ 327 struct sockopt_data { 328 caddr_t kbuf; /* allocated buffer */ 329 size_t ksize; /* given buffer size */ 330 size_t koff; /* data already used */ 331 size_t kavail; /* number of bytes available */ 332 size_t ktotal; /* total bytes pushed */ 333 struct sockopt *sopt; /* socket data */ 334 caddr_t sopt_val; /* sopt user buffer */ 335 size_t valsize; /* original data size */ 336 }; 337 338 struct ipfw_ifc; 339 340 typedef void (ipfw_ifc_cb)(struct ip_fw_chain *ch, void *cbdata, 341 uint16_t ifindex); 342 343 struct ipfw_iface { 344 struct named_object no; 345 char ifname[64]; 346 int resolved; 347 uint16_t ifindex; 348 uint16_t spare; 349 uint64_t gencnt; 350 TAILQ_HEAD(, ipfw_ifc) consumers; 351 }; 352 353 struct ipfw_ifc { 354 TAILQ_ENTRY(ipfw_ifc) next; 355 struct ipfw_iface *iface; 356 ipfw_ifc_cb *cb; 357 void *cbdata; 358 }; 359 360 /* Macro for working with various counters */ 361 #ifdef USERSPACE 362 #define IPFW_INC_RULE_COUNTER(_cntr, _bytes) do { \ 363 (_cntr)->pcnt++; \ 364 (_cntr)->bcnt += _bytes; \ 365 (_cntr)->timestamp = time_uptime; \ 366 } while (0) 367 368 #define IPFW_INC_DYN_COUNTER(_cntr, _bytes) do { \ 369 (_cntr)->pcnt++; \ 370 (_cntr)->bcnt += _bytes; \ 371 } while (0) 372 373 #define IPFW_ZERO_RULE_COUNTER(_cntr) do { \ 374 (_cntr)->pcnt = 0; \ 375 (_cntr)->bcnt = 0; \ 376 (_cntr)->timestamp = 0; \ 377 } while (0) 378 379 #define IPFW_ZERO_DYN_COUNTER(_cntr) do { \ 380 (_cntr)->pcnt = 0; \ 381 (_cntr)->bcnt = 0; \ 382 } while (0) 383 #else 384 #define IPFW_INC_RULE_COUNTER(_cntr, _bytes) do { \ 385 counter_u64_add((_cntr)->cntr, 1); \ 386 counter_u64_add((_cntr)->cntr + 1, _bytes); \ 387 if ((_cntr)->timestamp != time_uptime) \ 388 (_cntr)->timestamp = time_uptime; \ 389 } while (0) 390 391 #define IPFW_INC_DYN_COUNTER(_cntr, _bytes) do { \ 392 (_cntr)->pcnt++; \ 393 (_cntr)->bcnt += _bytes; \ 394 } while (0) 395 396 #define IPFW_ZERO_RULE_COUNTER(_cntr) do { \ 397 counter_u64_zero((_cntr)->cntr); \ 398 counter_u64_zero((_cntr)->cntr + 1); \ 399 (_cntr)->timestamp = 0; \ 400 } while (0) 401 402 #define IPFW_ZERO_DYN_COUNTER(_cntr) do { \ 403 (_cntr)->pcnt = 0; \ 404 (_cntr)->bcnt = 0; \ 405 } while (0) 406 #endif 407 408 #define TARG_VAL(ch, k, f) ((struct table_value *)((ch)->valuestate))[k].f 409 #define IP_FW_ARG_TABLEARG(ch, a, f) \ 410 (((a) == IP_FW_TARG) ? TARG_VAL(ch, tablearg, f) : (a)) 411 /* 412 * The lock is heavily used by ip_fw2.c (the main file) and ip_fw_nat.c 413 * so the variable and the macros must be here. 414 */ 415 416 #if defined( __linux__ ) || defined( _WIN32 ) 417 #define IPFW_LOCK_INIT(_chain) do { \ 418 rw_init(&(_chain)->rwmtx, "IPFW static rules"); \ 419 rw_init(&(_chain)->uh_lock, "IPFW UH lock"); \ 420 } while (0) 421 422 #define IPFW_LOCK_DESTROY(_chain) do { \ 423 rw_destroy(&(_chain)->rwmtx); \ 424 rw_destroy(&(_chain)->uh_lock); \ 425 } while (0) 426 427 #define IPFW_RLOCK_ASSERT(_chain) rw_assert(&(_chain)->rwmtx, RA_RLOCKED) 428 #define IPFW_WLOCK_ASSERT(_chain) rw_assert(&(_chain)->rwmtx, RA_WLOCKED) 429 430 #define IPFW_RLOCK_TRACKER 431 #define IPFW_RLOCK(p) rw_rlock(&(p)->rwmtx) 432 #define IPFW_RUNLOCK(p) rw_runlock(&(p)->rwmtx) 433 #define IPFW_WLOCK(p) rw_wlock(&(p)->rwmtx) 434 #define IPFW_WUNLOCK(p) rw_wunlock(&(p)->rwmtx) 435 #define IPFW_PF_RLOCK(p) IPFW_RLOCK(p) 436 #define IPFW_PF_RUNLOCK(p) IPFW_RUNLOCK(p) 437 #else /* FreeBSD */ 438 #define IPFW_LOCK_INIT(_chain) do { \ 439 rm_init(&(_chain)->rwmtx, "IPFW static rules"); \ 440 rw_init(&(_chain)->uh_lock, "IPFW UH lock"); \ 441 } while (0) 442 443 #define IPFW_LOCK_DESTROY(_chain) do { \ 444 rm_destroy(&(_chain)->rwmtx); \ 445 rw_destroy(&(_chain)->uh_lock); \ 446 } while (0) 447 448 #define IPFW_RLOCK_ASSERT(_chain) rm_assert(&(_chain)->rwmtx, RA_RLOCKED) 449 #define IPFW_WLOCK_ASSERT(_chain) rm_assert(&(_chain)->rwmtx, RA_WLOCKED) 450 451 #define IPFW_RLOCK_TRACKER struct rm_priotracker _tracker 452 #define IPFW_RLOCK(p) rm_rlock(&(p)->rwmtx, &_tracker) 453 #define IPFW_RUNLOCK(p) rm_runlock(&(p)->rwmtx, &_tracker) 454 #define IPFW_WLOCK(p) rm_wlock(&(p)->rwmtx) 455 #define IPFW_WUNLOCK(p) rm_wunlock(&(p)->rwmtx) 456 #define IPFW_PF_RLOCK(p) IPFW_RLOCK(p) 457 #define IPFW_PF_RUNLOCK(p) IPFW_RUNLOCK(p) 458 #endif 459 460 #define IPFW_UH_RLOCK_ASSERT(_chain) rw_assert(&(_chain)->uh_lock, RA_RLOCKED) 461 #define IPFW_UH_WLOCK_ASSERT(_chain) rw_assert(&(_chain)->uh_lock, RA_WLOCKED) 462 463 #define IPFW_UH_RLOCK(p) rw_rlock(&(p)->uh_lock) 464 #define IPFW_UH_RUNLOCK(p) rw_runlock(&(p)->uh_lock) 465 #define IPFW_UH_WLOCK(p) rw_wlock(&(p)->uh_lock) 466 #define IPFW_UH_WUNLOCK(p) rw_wunlock(&(p)->uh_lock) 467 468 struct obj_idx { 469 uint16_t uidx; /* internal index supplied by userland */ 470 uint16_t kidx; /* kernel object index */ 471 uint16_t off; /* tlv offset from rule end in 4-byte words */ 472 uint8_t spare; 473 uint8_t type; /* object type within its category */ 474 }; 475 476 struct rule_check_info { 477 uint16_t flags; /* rule-specific check flags */ 478 uint16_t table_opcodes; /* count of opcodes referencing table */ 479 uint16_t urule_numoff; /* offset of rulenum in bytes */ 480 uint8_t version; /* rule version */ 481 uint8_t spare; 482 ipfw_obj_ctlv *ctlv; /* name TLV containter */ 483 struct ip_fw *krule; /* resulting rule pointer */ 484 caddr_t urule; /* original rule pointer */ 485 struct obj_idx obuf[8]; /* table references storage */ 486 }; 487 488 /* Legacy interface support */ 489 /* 490 * FreeBSD 8 export rule format 491 */ 492 struct ip_fw_rule0 { 493 struct ip_fw *x_next; /* linked list of rules */ 494 struct ip_fw *next_rule; /* ptr to next [skipto] rule */ 495 /* 'next_rule' is used to pass up 'set_disable' status */ 496 497 uint16_t act_ofs; /* offset of action in 32-bit units */ 498 uint16_t cmd_len; /* # of 32-bit words in cmd */ 499 uint16_t rulenum; /* rule number */ 500 uint8_t set; /* rule set (0..31) */ 501 uint8_t _pad; /* padding */ 502 uint32_t id; /* rule id */ 503 504 /* These fields are present in all rules. */ 505 uint64_t pcnt; /* Packet counter */ 506 uint64_t bcnt; /* Byte counter */ 507 uint32_t timestamp; /* tv_sec of last match */ 508 509 ipfw_insn cmd[1]; /* storage for commands */ 510 }; 511 512 struct ip_fw_bcounter0 { 513 uint64_t pcnt; /* Packet counter */ 514 uint64_t bcnt; /* Byte counter */ 515 uint32_t timestamp; /* tv_sec of last match */ 516 }; 517 518 /* Kernel rule length */ 519 /* 520 * RULE _K_ SIZE _V_ -> 521 * get kernel size from userland rool version _V_. 522 * RULE _U_ SIZE _V_ -> 523 * get user size version _V_ from kernel rule 524 * RULESIZE _V_ -> 525 * get user size rule length 526 */ 527 /* FreeBSD8 <> current kernel format */ 528 #define RULEUSIZE0(r) (sizeof(struct ip_fw_rule0) + (r)->cmd_len * 4 - 4) 529 #define RULEKSIZE0(r) roundup2((sizeof(struct ip_fw) + (r)->cmd_len*4 - 4), 8) 530 /* FreeBSD11 <> current kernel format */ 531 #define RULEUSIZE1(r) (roundup2(sizeof(struct ip_fw_rule) + \ 532 (r)->cmd_len * 4 - 4, 8)) 533 #define RULEKSIZE1(r) roundup2((sizeof(struct ip_fw) + (r)->cmd_len*4 - 4), 8) 534 535 536 /* In ip_fw_iface.c */ 537 int ipfw_iface_init(void); 538 void ipfw_iface_destroy(void); 539 void vnet_ipfw_iface_destroy(struct ip_fw_chain *ch); 540 int ipfw_iface_ref(struct ip_fw_chain *ch, char *name, 541 struct ipfw_ifc *ic); 542 void ipfw_iface_unref(struct ip_fw_chain *ch, struct ipfw_ifc *ic); 543 void ipfw_iface_add_notify(struct ip_fw_chain *ch, struct ipfw_ifc *ic); 544 void ipfw_iface_del_notify(struct ip_fw_chain *ch, struct ipfw_ifc *ic); 545 546 /* In ip_fw_sockopt.c */ 547 void ipfw_init_skipto_cache(struct ip_fw_chain *chain); 548 void ipfw_destroy_skipto_cache(struct ip_fw_chain *chain); 549 int ipfw_find_rule(struct ip_fw_chain *chain, uint32_t key, uint32_t id); 550 int ipfw_ctl3(struct sockopt *sopt); 551 int ipfw_chk(struct ip_fw_args *args); 552 void ipfw_reap_add(struct ip_fw_chain *chain, struct ip_fw **head, 553 struct ip_fw *rule); 554 void ipfw_reap_rules(struct ip_fw *head); 555 void ipfw_init_counters(void); 556 void ipfw_destroy_counters(void); 557 struct ip_fw *ipfw_alloc_rule(struct ip_fw_chain *chain, size_t rulesize); 558 int ipfw_match_range(struct ip_fw *rule, ipfw_range_tlv *rt); 559 560 typedef int (sopt_handler_f)(struct ip_fw_chain *ch, 561 ip_fw3_opheader *op3, struct sockopt_data *sd); 562 struct ipfw_sopt_handler { 563 uint16_t opcode; 564 uint8_t version; 565 uint8_t dir; 566 sopt_handler_f *handler; 567 uint64_t refcnt; 568 }; 569 #define HDIR_SET 0x01 /* Handler is used to set some data */ 570 #define HDIR_GET 0x02 /* Handler is used to retrieve data */ 571 #define HDIR_BOTH HDIR_GET|HDIR_SET 572 573 void ipfw_init_sopt_handler(void); 574 void ipfw_destroy_sopt_handler(void); 575 void ipfw_add_sopt_handler(struct ipfw_sopt_handler *sh, size_t count); 576 int ipfw_del_sopt_handler(struct ipfw_sopt_handler *sh, size_t count); 577 caddr_t ipfw_get_sopt_space(struct sockopt_data *sd, size_t needed); 578 caddr_t ipfw_get_sopt_header(struct sockopt_data *sd, size_t needed); 579 #define IPFW_ADD_SOPT_HANDLER(f, c) do { \ 580 if ((f) != 0) \ 581 ipfw_add_sopt_handler(c, \ 582 sizeof(c) / sizeof(c[0])); \ 583 } while(0) 584 #define IPFW_DEL_SOPT_HANDLER(l, c) do { \ 585 if ((l) != 0) \ 586 ipfw_del_sopt_handler(c, \ 587 sizeof(c) / sizeof(c[0])); \ 588 } while(0) 589 590 typedef void (objhash_cb_t)(struct namedobj_instance *ni, struct named_object *, 591 void *arg); 592 typedef uint32_t (objhash_hash_f)(struct namedobj_instance *ni, void *key, 593 uint32_t kopt); 594 typedef int (objhash_cmp_f)(struct named_object *no, void *key, uint32_t kopt); 595 struct namedobj_instance *ipfw_objhash_create(uint32_t items); 596 void ipfw_objhash_destroy(struct namedobj_instance *); 597 void ipfw_objhash_bitmap_alloc(uint32_t items, void **idx, int *pblocks); 598 void ipfw_objhash_bitmap_merge(struct namedobj_instance *ni, 599 void **idx, int *blocks); 600 void ipfw_objhash_bitmap_swap(struct namedobj_instance *ni, 601 void **idx, int *blocks); 602 void ipfw_objhash_bitmap_free(void *idx, int blocks); 603 void ipfw_objhash_set_hashf(struct namedobj_instance *ni, objhash_hash_f *f); 604 struct named_object *ipfw_objhash_lookup_name(struct namedobj_instance *ni, 605 uint32_t set, char *name); 606 struct named_object *ipfw_objhash_lookup_kidx(struct namedobj_instance *ni, 607 uint16_t idx); 608 int ipfw_objhash_same_name(struct namedobj_instance *ni, struct named_object *a, 609 struct named_object *b); 610 void ipfw_objhash_add(struct namedobj_instance *ni, struct named_object *no); 611 void ipfw_objhash_del(struct namedobj_instance *ni, struct named_object *no); 612 uint32_t ipfw_objhash_count(struct namedobj_instance *ni); 613 void ipfw_objhash_foreach(struct namedobj_instance *ni, objhash_cb_t *f, 614 void *arg); 615 int ipfw_objhash_free_idx(struct namedobj_instance *ni, uint16_t idx); 616 int ipfw_objhash_alloc_idx(void *n, uint16_t *pidx); 617 void ipfw_objhash_set_funcs(struct namedobj_instance *ni, 618 objhash_hash_f *hash_f, objhash_cmp_f *cmp_f); 619 620 /* In ip_fw_table.c */ 621 struct table_info; 622 623 typedef int (table_lookup_t)(struct table_info *ti, void *key, uint32_t keylen, 624 uint32_t *val); 625 626 int ipfw_lookup_table(struct ip_fw_chain *ch, uint16_t tbl, in_addr_t addr, 627 uint32_t *val); 628 int ipfw_lookup_table_extended(struct ip_fw_chain *ch, uint16_t tbl, uint16_t plen, 629 void *paddr, uint32_t *val); 630 int ipfw_init_tables(struct ip_fw_chain *ch, int first); 631 int ipfw_resize_tables(struct ip_fw_chain *ch, unsigned int ntables); 632 int ipfw_switch_tables_namespace(struct ip_fw_chain *ch, unsigned int nsets); 633 void ipfw_destroy_tables(struct ip_fw_chain *ch, int last); 634 635 /* In ip_fw_nat.c -- XXX to be moved to ip_var.h */ 636 637 extern struct cfg_nat *(*lookup_nat_ptr)(struct nat_list *, int); 638 639 typedef int ipfw_nat_t(struct ip_fw_args *, struct cfg_nat *, struct mbuf *); 640 typedef int ipfw_nat_cfg_t(struct sockopt *); 641 642 VNET_DECLARE(int, ipfw_nat_ready); 643 #define V_ipfw_nat_ready VNET(ipfw_nat_ready) 644 #define IPFW_NAT_LOADED (V_ipfw_nat_ready) 645 646 extern ipfw_nat_t *ipfw_nat_ptr; 647 extern ipfw_nat_cfg_t *ipfw_nat_cfg_ptr; 648 extern ipfw_nat_cfg_t *ipfw_nat_del_ptr; 649 extern ipfw_nat_cfg_t *ipfw_nat_get_cfg_ptr; 650 extern ipfw_nat_cfg_t *ipfw_nat_get_log_ptr; 651 652 #endif /* _KERNEL */ 653 #endif /* _IPFW2_PRIVATE_H */ 654