2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2002-2009 Luigi Rizzo, Universita` di Pisa
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #ifndef _IPFW2_PRIVATE_H
31 #define _IPFW2_PRIVATE_H
34 * Internal constants and data structures used by ipfw components
35 * and not meant to be exported outside the kernel.
41 * For platforms that do not have SYSCTL support, we wrap the
42 * SYSCTL_* into a function (one per file) to collect the values
43 * into an array at module initialization. The wrapping macros,
44 * SYSBEGIN() and SYSEND, are empty in the default case.
53 /* Return values from ipfw_chk() */
68 * Structure for collecting parameters to dummynet for ip6_output forwarding
71 struct ip6_pktopts *opt_or;
73 struct ip6_moptions *im6o_or;
74 struct ifnet *origifp_or;
76 struct sockaddr_in6 dst_or;
82 * Arguments for calling ipfw_chk() and dummynet_io(). We put them
83 * all into a structure because this way it is easier and more
84 * efficient to pass variables around and extend the interface.
88 #define IPFW_ARGS_ETHER 0x00010000 /* valid ethernet header */
89 #define IPFW_ARGS_NH4 0x00020000 /* IPv4 next hop in hopstore */
90 #define IPFW_ARGS_NH6 0x00040000 /* IPv6 next hop in hopstore */
91 #define IPFW_ARGS_NH4PTR 0x00080000 /* IPv4 next hop in next_hop */
92 #define IPFW_ARGS_NH6PTR 0x00100000 /* IPv6 next hop in next_hop6 */
93 #define IPFW_ARGS_REF 0x00200000 /* valid ipfw_rule_ref */
94 #define IPFW_ARGS_IN 0x00400000 /* called on input */
95 #define IPFW_ARGS_OUT 0x00800000 /* called on output */
96 #define IPFW_ARGS_IP4 0x01000000 /* belongs to v4 ISR */
97 #define IPFW_ARGS_IP6 0x02000000 /* belongs to v6 ISR */
98 #define IPFW_ARGS_DROP 0x04000000 /* drop it (dummynet) */
99 #define IPFW_ARGS_LENMASK 0x0000ffff /* length of data in *mem */
100 #define IPFW_ARGS_LENGTH(f) ((f) & IPFW_ARGS_LENMASK)
102 * On return, it points to the matching rule.
103 * On entry, rule.slot > 0 means the info is valid and
104 * contains the starting rule for an ipfw search.
105 * If chain_id == chain->id && slot >0 then jump to that slot.
106 * Otherwise, we locate the first rule >= rulenum:rule_id
108 struct ipfw_rule_ref rule; /* match/restart info */
110 struct ifnet *ifp; /* input/output interface */
114 * next_hop[6] pointers can be used to point to next hop
115 * stored in rule's opcode to avoid copying into hopstore.
116 * Also, it is expected that all 0x1-0x10 flags are mutually
119 struct sockaddr_in *next_hop;
120 struct sockaddr_in6 *next_hop6;
121 /* ipfw next hop storage */
122 struct sockaddr_in hopstore;
124 struct in6_addr sin6_addr;
125 uint32_t sin6_scope_id;
130 struct mbuf *m; /* the mbuf chain */
131 void *mem; /* or memory pointer */
133 struct ipfw_flow_id f_id; /* grabbed from IP header */
136 MALLOC_DECLARE(M_IPFW);
138 /* wrapper for freeing a packet, in case we need to do more work */
140 #if defined(__linux__) || defined(_WIN32)
141 #define FREE_PKT(m) netisr_dispatch(-1, m)
143 #define FREE_PKT(m) m_freem(m)
145 #endif /* !FREE_PKT */
148 * Function definitions.
150 int ipfw_chk(struct ip_fw_args *args);
151 struct mbuf *ipfw_send_pkt(struct mbuf *, struct ipfw_flow_id *,
152 u_int32_t, u_int32_t, int);
154 int ipfw_attach_hooks(void);
155 void ipfw_detach_hooks(void);
157 void ipfw_nat_destroy(void);
164 void ipfw_bpf_init(int);
165 void ipfw_bpf_uninit(int);
166 void ipfw_bpf_tap(u_char *, u_int);
167 void ipfw_bpf_mtap(struct mbuf *);
168 void ipfw_bpf_mtap2(void *, u_int, struct mbuf *);
169 void ipfw_log(struct ip_fw_chain *chain, struct ip_fw *f, u_int hlen,
170 struct ip_fw_args *args, u_short offset, uint32_t tablearg, struct ip *ip);
171 VNET_DECLARE(u_int64_t, norule_counter);
172 #define V_norule_counter VNET(norule_counter)
173 VNET_DECLARE(int, verbose_limit);
174 #define V_verbose_limit VNET(verbose_limit)
176 /* In ip_fw_dynamic.c */
179 enum { /* result for matching dynamic rules */
187 * Macro to determine that we need to do or redo dynamic state lookup.
188 * direction == MATCH_UNKNOWN means that this is first lookup, then we need
190 * Otherwise check the state name, if previous lookup was for "any" name,
191 * this means there is no state with specific name. Thus no need to do
192 * lookup. If previous name was not "any", redo lookup for specific name.
194 #define DYN_LOOKUP_NEEDED(p, cmd) \
195 ((p)->direction == MATCH_UNKNOWN || \
196 ((p)->kidx != 0 && (p)->kidx != (cmd)->arg1))
197 #define DYN_INFO_INIT(p) do { \
198 (p)->direction = MATCH_UNKNOWN; \
201 struct ipfw_dyn_info {
202 uint16_t direction; /* match direction */
203 uint16_t kidx; /* state name kidx */
204 uint32_t hashval; /* hash value */
205 uint32_t version; /* bucket version */
208 int ipfw_dyn_install_state(struct ip_fw_chain *chain, struct ip_fw *rule,
209 const ipfw_insn_limit *cmd, const struct ip_fw_args *args,
210 const void *ulp, int pktlen, struct ipfw_dyn_info *info,
212 struct ip_fw *ipfw_dyn_lookup_state(const struct ip_fw_args *args,
213 const void *ulp, int pktlen, const ipfw_insn *cmd,
214 struct ipfw_dyn_info *info);
216 int ipfw_is_dyn_rule(struct ip_fw *rule);
217 void ipfw_expire_dyn_states(struct ip_fw_chain *, ipfw_range_tlv *);
218 void ipfw_get_dynamic(struct ip_fw_chain *chain, char **bp, const char *ep);
219 int ipfw_dump_states(struct ip_fw_chain *chain, struct sockopt_data *sd);
221 void ipfw_dyn_init(struct ip_fw_chain *); /* per-vnet initialization */
222 void ipfw_dyn_uninit(int); /* per-vnet deinitialization */
223 int ipfw_dyn_len(void);
224 uint32_t ipfw_dyn_get_count(uint32_t *, int *);
225 void ipfw_dyn_reset_eaction(struct ip_fw_chain *ch, uint16_t eaction_id,
226 uint16_t default_id, uint16_t instance_id);
228 /* common variables */
229 VNET_DECLARE(int, fw_one_pass);
230 #define V_fw_one_pass VNET(fw_one_pass)
232 VNET_DECLARE(int, fw_verbose);
233 #define V_fw_verbose VNET(fw_verbose)
235 VNET_DECLARE(struct ip_fw_chain, layer3_chain);
236 #define V_layer3_chain VNET(layer3_chain)
238 VNET_DECLARE(int, ipfw_vnet_ready);
239 #define V_ipfw_vnet_ready VNET(ipfw_vnet_ready)
241 VNET_DECLARE(u_int32_t, set_disable);
242 #define V_set_disable VNET(set_disable)
244 VNET_DECLARE(int, autoinc_step);
245 #define V_autoinc_step VNET(autoinc_step)
247 VNET_DECLARE(unsigned int, fw_tables_max);
248 #define V_fw_tables_max VNET(fw_tables_max)
250 VNET_DECLARE(unsigned int, fw_tables_sets);
251 #define V_fw_tables_sets VNET(fw_tables_sets)
253 struct tables_config;
257 * Here we have the structure representing an ipfw rule.
259 * It starts with a general area
260 * followed by an array of one or more instructions, which the code
261 * accesses as an array of 32-bit values.
263 * Given a rule pointer r:
265 * r->cmd is the start of the first instruction.
266 * ACTION_PTR(r) is the start of the first action (things to do
267 * once a rule matched).
271 uint16_t act_ofs; /* offset of action in 32-bit units */
272 uint16_t cmd_len; /* # of 32-bit words in cmd */
273 uint16_t rulenum; /* rule number */
274 uint8_t set; /* rule set (0..31) */
275 uint8_t flags; /* currently unused */
276 counter_u64_t cntr; /* Pointer to rule counters */
277 uint32_t timestamp; /* tv_sec of last match */
278 uint32_t id; /* rule id */
279 uint32_t cached_id; /* used by jump_fast */
280 uint32_t cached_pos; /* used by jump_fast */
281 uint32_t refcnt; /* number of references */
283 struct ip_fw *next; /* linked list of deleted rules */
284 ipfw_insn cmd[1]; /* storage for commands */
287 #define IPFW_RULE_CNTR_SIZE (2 * sizeof(uint64_t))
292 struct ip_fw **map; /* array of rule ptrs to ease lookup */
293 uint32_t id; /* ruleset id */
294 int n_rules; /* number of static rules */
295 void *tablestate; /* runtime table info */
296 void *valuestate; /* runtime table value info */
297 int *idxmap; /* skipto array of rules */
298 void **srvstate; /* runtime service mappings */
299 #if defined( __linux__ ) || defined( _WIN32 )
304 int static_len; /* total len of static rules (v0) */
305 uint32_t gencnt; /* NAT generation count */
306 LIST_HEAD(nat_list, cfg_nat) nat; /* list of nat entries */
307 struct ip_fw *default_rule;
308 struct tables_config *tblcfg; /* tables module data */
309 void *ifcfg; /* interface module data */
310 int *idxmap_back; /* standby skipto array of rules */
311 struct namedobj_instance *srvmap; /* cfg name->number mappings */
312 #if defined( __linux__ ) || defined( _WIN32 )
315 struct rwlock uh_lock; /* lock for upper half */
319 /* 64-byte structure representing multi-field table value */
321 uint32_t tag; /* O_TAG/O_TAGGED */
322 uint32_t pipe; /* O_PIPE/O_QUEUE */
323 uint16_t divert; /* O_DIVERT/O_TEE */
324 uint16_t skipto; /* skipto, CALLRET */
325 uint32_t netgraph; /* O_NETGRAPH/O_NGTEE */
326 uint32_t fib; /* O_SETFIB */
327 uint32_t nat; /* O_NAT */
334 uint32_t limit; /* O_LIMIT */
335 uint32_t zoneid; /* scope zone id for nh6 */
336 uint64_t refcnt; /* Number of references */
340 struct named_object {
341 TAILQ_ENTRY(named_object) nn_next; /* namehash */
342 TAILQ_ENTRY(named_object) nv_next; /* valuehash */
343 char *name; /* object name */
344 uint16_t etlv; /* Export TLV id */
345 uint8_t subtype;/* object subtype within class */
346 uint8_t set; /* set object belongs to */
347 uint16_t kidx; /* object kernel index */
349 uint32_t ocnt; /* object counter for internal use */
350 uint32_t refcnt; /* number of references */
352 TAILQ_HEAD(namedobjects_head, named_object);
354 struct sockopt; /* used by tcp_var.h */
355 struct sockopt_data {
356 caddr_t kbuf; /* allocated buffer */
357 size_t ksize; /* given buffer size */
358 size_t koff; /* data already used */
359 size_t kavail; /* number of bytes available */
360 size_t ktotal; /* total bytes pushed */
361 struct sockopt *sopt; /* socket data */
362 caddr_t sopt_val; /* sopt user buffer */
363 size_t valsize; /* original data size */
368 typedef void (ipfw_ifc_cb)(struct ip_fw_chain *ch, void *cbdata,
372 struct named_object no;
378 TAILQ_HEAD(, ipfw_ifc) consumers;
382 TAILQ_ENTRY(ipfw_ifc) next;
383 struct ipfw_iface *iface;
388 /* Macro for working with various counters */
389 #define IPFW_INC_RULE_COUNTER(_cntr, _bytes) do { \
390 counter_u64_add((_cntr)->cntr, 1); \
391 counter_u64_add((_cntr)->cntr + 1, _bytes); \
392 if ((_cntr)->timestamp != time_uptime) \
393 (_cntr)->timestamp = time_uptime; \
396 #define IPFW_INC_DYN_COUNTER(_cntr, _bytes) do { \
398 (_cntr)->bcnt += _bytes; \
401 #define IPFW_ZERO_RULE_COUNTER(_cntr) do { \
402 counter_u64_zero((_cntr)->cntr); \
403 counter_u64_zero((_cntr)->cntr + 1); \
404 (_cntr)->timestamp = 0; \
407 #define IPFW_ZERO_DYN_COUNTER(_cntr) do { \
412 #define TARG_VAL(ch, k, f) ((struct table_value *)((ch)->valuestate))[k].f
413 #define IP_FW_ARG_TABLEARG(ch, a, f) \
414 (((a) == IP_FW_TARG) ? TARG_VAL(ch, tablearg, f) : (a))
416 * The lock is heavily used by ip_fw2.c (the main file) and ip_fw_nat.c
417 * so the variable and the macros must be here.
420 #if defined( __linux__ ) || defined( _WIN32 )
421 #define IPFW_LOCK_INIT(_chain) do { \
422 rw_init(&(_chain)->rwmtx, "IPFW static rules"); \
423 rw_init(&(_chain)->uh_lock, "IPFW UH lock"); \
426 #define IPFW_LOCK_DESTROY(_chain) do { \
427 rw_destroy(&(_chain)->rwmtx); \
428 rw_destroy(&(_chain)->uh_lock); \
431 #define IPFW_RLOCK_ASSERT(_chain) rw_assert(&(_chain)->rwmtx, RA_RLOCKED)
432 #define IPFW_WLOCK_ASSERT(_chain) rw_assert(&(_chain)->rwmtx, RA_WLOCKED)
434 #define IPFW_RLOCK_TRACKER
435 #define IPFW_RLOCK(p) rw_rlock(&(p)->rwmtx)
436 #define IPFW_RUNLOCK(p) rw_runlock(&(p)->rwmtx)
437 #define IPFW_WLOCK(p) rw_wlock(&(p)->rwmtx)
438 #define IPFW_WUNLOCK(p) rw_wunlock(&(p)->rwmtx)
439 #define IPFW_PF_RLOCK(p) IPFW_RLOCK(p)
440 #define IPFW_PF_RUNLOCK(p) IPFW_RUNLOCK(p)
442 #define IPFW_LOCK_INIT(_chain) do { \
443 rm_init_flags(&(_chain)->rwmtx, "IPFW static rules", RM_RECURSE); \
444 rw_init(&(_chain)->uh_lock, "IPFW UH lock"); \
447 #define IPFW_LOCK_DESTROY(_chain) do { \
448 rm_destroy(&(_chain)->rwmtx); \
449 rw_destroy(&(_chain)->uh_lock); \
452 #define IPFW_RLOCK_ASSERT(_chain) rm_assert(&(_chain)->rwmtx, RA_RLOCKED)
453 #define IPFW_WLOCK_ASSERT(_chain) rm_assert(&(_chain)->rwmtx, RA_WLOCKED)
455 #define IPFW_RLOCK_TRACKER struct rm_priotracker _tracker
456 #define IPFW_RLOCK(p) rm_rlock(&(p)->rwmtx, &_tracker)
457 #define IPFW_RUNLOCK(p) rm_runlock(&(p)->rwmtx, &_tracker)
458 #define IPFW_WLOCK(p) rm_wlock(&(p)->rwmtx)
459 #define IPFW_WUNLOCK(p) rm_wunlock(&(p)->rwmtx)
460 #define IPFW_PF_RLOCK(p) IPFW_RLOCK(p)
461 #define IPFW_PF_RUNLOCK(p) IPFW_RUNLOCK(p)
464 #define IPFW_UH_RLOCK_ASSERT(_chain) rw_assert(&(_chain)->uh_lock, RA_RLOCKED)
465 #define IPFW_UH_WLOCK_ASSERT(_chain) rw_assert(&(_chain)->uh_lock, RA_WLOCKED)
466 #define IPFW_UH_UNLOCK_ASSERT(_chain) rw_assert(&(_chain)->uh_lock, RA_UNLOCKED)
468 #define IPFW_UH_RLOCK(p) rw_rlock(&(p)->uh_lock)
469 #define IPFW_UH_RUNLOCK(p) rw_runlock(&(p)->uh_lock)
470 #define IPFW_UH_WLOCK(p) rw_wlock(&(p)->uh_lock)
471 #define IPFW_UH_WUNLOCK(p) rw_wunlock(&(p)->uh_lock)
474 uint16_t uidx; /* internal index supplied by userland */
475 uint16_t kidx; /* kernel object index */
476 uint16_t off; /* tlv offset from rule end in 4-byte words */
478 uint8_t type; /* object type within its category */
481 struct rule_check_info {
482 uint16_t flags; /* rule-specific check flags */
483 uint16_t object_opcodes; /* num of opcodes referencing objects */
484 uint16_t urule_numoff; /* offset of rulenum in bytes */
485 uint8_t version; /* rule version */
487 ipfw_obj_ctlv *ctlv; /* name TLV containter */
488 struct ip_fw *krule; /* resulting rule pointer */
489 caddr_t urule; /* original rule pointer */
490 struct obj_idx obuf[8]; /* table references storage */
493 /* Legacy interface support */
495 * FreeBSD 8 export rule format
498 struct ip_fw *x_next; /* linked list of rules */
499 struct ip_fw *next_rule; /* ptr to next [skipto] rule */
500 /* 'next_rule' is used to pass up 'set_disable' status */
502 uint16_t act_ofs; /* offset of action in 32-bit units */
503 uint16_t cmd_len; /* # of 32-bit words in cmd */
504 uint16_t rulenum; /* rule number */
505 uint8_t set; /* rule set (0..31) */
506 uint8_t _pad; /* padding */
507 uint32_t id; /* rule id */
509 /* These fields are present in all rules. */
510 uint64_t pcnt; /* Packet counter */
511 uint64_t bcnt; /* Byte counter */
512 uint32_t timestamp; /* tv_sec of last match */
514 ipfw_insn cmd[1]; /* storage for commands */
517 struct ip_fw_bcounter0 {
518 uint64_t pcnt; /* Packet counter */
519 uint64_t bcnt; /* Byte counter */
520 uint32_t timestamp; /* tv_sec of last match */
523 /* Kernel rule length */
525 * RULE _K_ SIZE _V_ ->
526 * get kernel size from userland rool version _V_.
527 * RULE _U_ SIZE _V_ ->
528 * get user size version _V_ from kernel rule
530 * get user size rule length
532 /* FreeBSD8 <> current kernel format */
533 #define RULEUSIZE0(r) (sizeof(struct ip_fw_rule0) + (r)->cmd_len * 4 - 4)
534 #define RULEKSIZE0(r) roundup2((sizeof(struct ip_fw) + (r)->cmd_len*4 - 4), 8)
535 /* FreeBSD11 <> current kernel format */
536 #define RULEUSIZE1(r) (roundup2(sizeof(struct ip_fw_rule) + \
537 (r)->cmd_len * 4 - 4, 8))
538 #define RULEKSIZE1(r) roundup2((sizeof(struct ip_fw) + (r)->cmd_len*4 - 4), 8)
541 * Tables/Objects index rewriting code
544 /* Default and maximum number of ipfw tables/objects. */
545 #define IPFW_TABLES_MAX 65536
546 #define IPFW_TABLES_DEFAULT 128
547 #define IPFW_OBJECTS_MAX 65536
548 #define IPFW_OBJECTS_DEFAULT 1024
550 #define CHAIN_TO_SRV(ch) ((ch)->srvmap)
551 #define SRV_OBJECT(ch, idx) ((ch)->srvstate[(idx)])
554 uint32_t set; /* table set */
555 uint16_t uidx; /* table index */
556 uint8_t type; /* table type */
559 int tlen; /* Total TLV size block */
560 void *tlvs; /* Pointer to first TLV */
564 * Classifier callback. Checks if @cmd opcode contains kernel object reference.
565 * If true, returns its index and type.
566 * Returns 0 if match is found, 1 overwise.
568 typedef int (ipfw_obj_rw_cl)(ipfw_insn *cmd, uint16_t *puidx, uint8_t *ptype);
570 * Updater callback. Sets kernel object reference index to @puidx
572 typedef void (ipfw_obj_rw_upd)(ipfw_insn *cmd, uint16_t puidx);
574 * Finder callback. Tries to find named object by name (specified via @ti).
575 * Stores found named object pointer in @pno.
576 * If object was not found, NULL is stored.
578 * Return 0 if input data was valid.
580 typedef int (ipfw_obj_fname_cb)(struct ip_fw_chain *ch,
581 struct tid_info *ti, struct named_object **pno);
583 * Another finder callback. Tries to findex named object by kernel index.
585 * Returns pointer to named object or NULL.
587 typedef struct named_object *(ipfw_obj_fidx_cb)(struct ip_fw_chain *ch,
590 * Object creator callback. Tries to create object specified by @ti.
591 * Stores newly-allocated object index in @pkidx.
593 * Returns 0 on success.
595 typedef int (ipfw_obj_create_cb)(struct ip_fw_chain *ch, struct tid_info *ti,
598 * Object destroy callback. Intended to free resources allocated by
599 * create_object callback.
601 typedef void (ipfw_obj_destroy_cb)(struct ip_fw_chain *ch,
602 struct named_object *no);
604 * Sets handler callback. Handles moving and swaping set of named object.
605 * SWAP_ALL moves all named objects from set `set' to `new_set' and vise versa;
606 * TEST_ALL checks that there aren't any named object with conflicting names;
607 * MOVE_ALL moves all named objects from set `set' to `new_set';
608 * COUNT_ONE used to count number of references used by object with kidx `set';
609 * TEST_ONE checks that named object with kidx `set' can be moved to `new_set`;
610 * MOVE_ONE moves named object with kidx `set' to set `new_set'.
613 SWAP_ALL = 0, TEST_ALL, MOVE_ALL, COUNT_ONE, TEST_ONE, MOVE_ONE
615 typedef int (ipfw_obj_sets_cb)(struct ip_fw_chain *ch,
616 uint16_t set, uint8_t new_set, enum ipfw_sets_cmd cmd);
619 struct opcode_obj_rewrite {
620 uint32_t opcode; /* Opcode to act upon */
621 uint32_t etlv; /* Relevant export TLV id */
622 ipfw_obj_rw_cl *classifier; /* Check if rewrite is needed */
623 ipfw_obj_rw_upd *update; /* update cmd with new value */
624 ipfw_obj_fname_cb *find_byname; /* Find named object by name */
625 ipfw_obj_fidx_cb *find_bykidx; /* Find named object by kidx */
626 ipfw_obj_create_cb *create_object; /* Create named object */
627 ipfw_obj_destroy_cb *destroy_object;/* Destroy named object */
628 ipfw_obj_sets_cb *manage_sets; /* Swap or move sets */
631 #define IPFW_ADD_OBJ_REWRITER(f, c) do { \
633 ipfw_add_obj_rewriter(c, \
634 sizeof(c) / sizeof(c[0])); \
636 #define IPFW_DEL_OBJ_REWRITER(l, c) do { \
638 ipfw_del_obj_rewriter(c, \
639 sizeof(c) / sizeof(c[0])); \
642 /* In ip_fw_iface.c */
643 int ipfw_iface_init(void);
644 void ipfw_iface_destroy(void);
645 void vnet_ipfw_iface_destroy(struct ip_fw_chain *ch);
646 int ipfw_iface_ref(struct ip_fw_chain *ch, char *name,
647 struct ipfw_ifc *ic);
648 void ipfw_iface_unref(struct ip_fw_chain *ch, struct ipfw_ifc *ic);
649 void ipfw_iface_add_notify(struct ip_fw_chain *ch, struct ipfw_ifc *ic);
650 void ipfw_iface_del_notify(struct ip_fw_chain *ch, struct ipfw_ifc *ic);
652 /* In ip_fw_sockopt.c */
653 void ipfw_init_skipto_cache(struct ip_fw_chain *chain);
654 void ipfw_destroy_skipto_cache(struct ip_fw_chain *chain);
655 int ipfw_find_rule(struct ip_fw_chain *chain, uint32_t key, uint32_t id);
656 int ipfw_ctl3(struct sockopt *sopt);
657 int ipfw_add_protected_rule(struct ip_fw_chain *chain, struct ip_fw *rule,
659 void ipfw_reap_add(struct ip_fw_chain *chain, struct ip_fw **head,
661 void ipfw_reap_rules(struct ip_fw *head);
662 void ipfw_init_counters(void);
663 void ipfw_destroy_counters(void);
664 struct ip_fw *ipfw_alloc_rule(struct ip_fw_chain *chain, size_t rulesize);
665 void ipfw_free_rule(struct ip_fw *rule);
666 int ipfw_match_range(struct ip_fw *rule, ipfw_range_tlv *rt);
667 int ipfw_mark_object_kidx(uint32_t *bmask, uint16_t etlv, uint16_t kidx);
668 ipfw_insn *ipfw_get_action(struct ip_fw *);
670 typedef int (sopt_handler_f)(struct ip_fw_chain *ch,
671 ip_fw3_opheader *op3, struct sockopt_data *sd);
672 struct ipfw_sopt_handler {
676 sopt_handler_f *handler;
679 #define HDIR_SET 0x01 /* Handler is used to set some data */
680 #define HDIR_GET 0x02 /* Handler is used to retrieve data */
681 #define HDIR_BOTH HDIR_GET|HDIR_SET
683 void ipfw_init_sopt_handler(void);
684 void ipfw_destroy_sopt_handler(void);
685 void ipfw_add_sopt_handler(struct ipfw_sopt_handler *sh, size_t count);
686 int ipfw_del_sopt_handler(struct ipfw_sopt_handler *sh, size_t count);
687 caddr_t ipfw_get_sopt_space(struct sockopt_data *sd, size_t needed);
688 caddr_t ipfw_get_sopt_header(struct sockopt_data *sd, size_t needed);
689 #define IPFW_ADD_SOPT_HANDLER(f, c) do { \
691 ipfw_add_sopt_handler(c, \
692 sizeof(c) / sizeof(c[0])); \
694 #define IPFW_DEL_SOPT_HANDLER(l, c) do { \
696 ipfw_del_sopt_handler(c, \
697 sizeof(c) / sizeof(c[0])); \
700 struct namedobj_instance;
701 typedef int (objhash_cb_t)(struct namedobj_instance *ni, struct named_object *,
703 typedef uint32_t (objhash_hash_f)(struct namedobj_instance *ni, const void *key,
705 typedef int (objhash_cmp_f)(struct named_object *no, const void *key,
707 struct namedobj_instance *ipfw_objhash_create(uint32_t items);
708 void ipfw_objhash_destroy(struct namedobj_instance *);
709 void ipfw_objhash_bitmap_alloc(uint32_t items, void **idx, int *pblocks);
710 void ipfw_objhash_bitmap_merge(struct namedobj_instance *ni,
711 void **idx, int *blocks);
712 void ipfw_objhash_bitmap_swap(struct namedobj_instance *ni,
713 void **idx, int *blocks);
714 void ipfw_objhash_bitmap_free(void *idx, int blocks);
715 void ipfw_objhash_set_hashf(struct namedobj_instance *ni, objhash_hash_f *f);
716 struct named_object *ipfw_objhash_lookup_name(struct namedobj_instance *ni,
717 uint32_t set, char *name);
718 struct named_object *ipfw_objhash_lookup_name_type(struct namedobj_instance *ni,
719 uint32_t set, uint32_t type, const char *name);
720 struct named_object *ipfw_objhash_lookup_kidx(struct namedobj_instance *ni,
722 int ipfw_objhash_same_name(struct namedobj_instance *ni, struct named_object *a,
723 struct named_object *b);
724 void ipfw_objhash_add(struct namedobj_instance *ni, struct named_object *no);
725 void ipfw_objhash_del(struct namedobj_instance *ni, struct named_object *no);
726 uint32_t ipfw_objhash_count(struct namedobj_instance *ni);
727 uint32_t ipfw_objhash_count_type(struct namedobj_instance *ni, uint16_t type);
728 int ipfw_objhash_foreach(struct namedobj_instance *ni, objhash_cb_t *f,
730 int ipfw_objhash_foreach_type(struct namedobj_instance *ni, objhash_cb_t *f,
731 void *arg, uint16_t type);
732 int ipfw_objhash_free_idx(struct namedobj_instance *ni, uint16_t idx);
733 int ipfw_objhash_alloc_idx(void *n, uint16_t *pidx);
734 void ipfw_objhash_set_funcs(struct namedobj_instance *ni,
735 objhash_hash_f *hash_f, objhash_cmp_f *cmp_f);
736 int ipfw_objhash_find_type(struct namedobj_instance *ni, struct tid_info *ti,
737 uint32_t etlv, struct named_object **pno);
738 void ipfw_export_obj_ntlv(struct named_object *no, ipfw_obj_ntlv *ntlv);
739 ipfw_obj_ntlv *ipfw_find_name_tlv_type(void *tlvs, int len, uint16_t uidx,
741 void ipfw_init_obj_rewriter(void);
742 void ipfw_destroy_obj_rewriter(void);
743 void ipfw_add_obj_rewriter(struct opcode_obj_rewrite *rw, size_t count);
744 int ipfw_del_obj_rewriter(struct opcode_obj_rewrite *rw, size_t count);
746 int create_objects_compat(struct ip_fw_chain *ch, ipfw_insn *cmd,
747 struct obj_idx *oib, struct obj_idx *pidx, struct tid_info *ti);
748 void update_opcode_kidx(ipfw_insn *cmd, uint16_t idx);
749 int classify_opcode_kidx(ipfw_insn *cmd, uint16_t *puidx);
750 void ipfw_init_srv(struct ip_fw_chain *ch);
751 void ipfw_destroy_srv(struct ip_fw_chain *ch);
752 int ipfw_check_object_name_generic(const char *name);
753 int ipfw_obj_manage_sets(struct namedobj_instance *ni, uint16_t type,
754 uint16_t set, uint8_t new_set, enum ipfw_sets_cmd cmd);
756 /* In ip_fw_eaction.c */
757 typedef int (ipfw_eaction_t)(struct ip_fw_chain *ch, struct ip_fw_args *args,
758 ipfw_insn *cmd, int *done);
759 int ipfw_eaction_init(struct ip_fw_chain *ch, int first);
760 void ipfw_eaction_uninit(struct ip_fw_chain *ch, int last);
762 uint16_t ipfw_add_eaction(struct ip_fw_chain *ch, ipfw_eaction_t handler,
764 int ipfw_del_eaction(struct ip_fw_chain *ch, uint16_t eaction_id);
765 int ipfw_run_eaction(struct ip_fw_chain *ch, struct ip_fw_args *args,
766 ipfw_insn *cmd, int *done);
767 int ipfw_reset_eaction(struct ip_fw_chain *ch, struct ip_fw *rule,
768 uint16_t eaction_id, uint16_t default_id, uint16_t instance_id);
769 int ipfw_reset_eaction_instance(struct ip_fw_chain *ch, uint16_t eaction_id,
770 uint16_t instance_id);
772 /* In ip_fw_table.c */
775 typedef int (table_lookup_t)(struct table_info *ti, void *key, uint32_t keylen,
778 int ipfw_lookup_table(struct ip_fw_chain *ch, uint16_t tbl, uint16_t plen,
779 void *paddr, uint32_t *val);
780 struct named_object *ipfw_objhash_lookup_table_kidx(struct ip_fw_chain *ch,
782 int ipfw_ref_table(struct ip_fw_chain *ch, ipfw_obj_ntlv *ntlv, uint16_t *kidx);
783 void ipfw_unref_table(struct ip_fw_chain *ch, uint16_t kidx);
784 int ipfw_init_tables(struct ip_fw_chain *ch, int first);
785 int ipfw_resize_tables(struct ip_fw_chain *ch, unsigned int ntables);
786 int ipfw_switch_tables_namespace(struct ip_fw_chain *ch, unsigned int nsets);
787 void ipfw_destroy_tables(struct ip_fw_chain *ch, int last);
789 /* In ip_fw_nat.c -- XXX to be moved to ip_var.h */
791 extern struct cfg_nat *(*lookup_nat_ptr)(struct nat_list *, int);
793 typedef int ipfw_nat_t(struct ip_fw_args *, struct cfg_nat *, struct mbuf *);
794 typedef int ipfw_nat_cfg_t(struct sockopt *);
796 VNET_DECLARE(int, ipfw_nat_ready);
797 #define V_ipfw_nat_ready VNET(ipfw_nat_ready)
798 #define IPFW_NAT_LOADED (V_ipfw_nat_ready)
800 extern ipfw_nat_t *ipfw_nat_ptr;
801 extern ipfw_nat_cfg_t *ipfw_nat_cfg_ptr;
802 extern ipfw_nat_cfg_t *ipfw_nat_del_ptr;
803 extern ipfw_nat_cfg_t *ipfw_nat_get_cfg_ptr;
804 extern ipfw_nat_cfg_t *ipfw_nat_get_log_ptr;
806 /* Helper functions for IP checksum adjustment */
807 static __inline uint16_t
808 cksum_add(uint16_t sum, uint16_t a)
813 return (res + (res < a));
816 static __inline uint16_t
817 cksum_adjust(uint16_t oldsum, uint16_t old, uint16_t new)
820 return (~cksum_add(cksum_add(~oldsum, ~old), new));
824 #endif /* _IPFW2_PRIVATE_H */