2 * Copyright (c) 2002-2009 Luigi Rizzo, Universita` di Pisa
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
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.
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
28 #ifndef _IPFW2_PRIVATE_H
29 #define _IPFW2_PRIVATE_H
32 * Internal constants and data structures used by ipfw components
33 * and not meant to be exported outside the kernel.
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.
51 /* Return values from ipfw_chk() */
65 * Structure for collecting parameters to dummynet for ip6_output forwarding
68 struct ip6_pktopts *opt_or;
70 struct ip6_moptions *im6o_or;
71 struct ifnet *origifp_or;
73 struct sockaddr_in6 dst_or;
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.
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 */
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
96 struct ipfw_rule_ref rule; /* match/restart info */
98 struct ether_header *eh; /* for bridged packets */
100 struct ipfw_flow_id f_id; /* grabbed from IP header */
101 //uint32_t cookie; /* a cookie depending on rule action */
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;
111 MALLOC_DECLARE(M_IPFW);
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
119 * indicating the protocol (if necessary)
127 PROTO_LAYER2 = 0x4, /* set for layer 2 */
128 /* PROTO_DEFAULT = 0, */
131 PROTO_IFB = 0x0c, /* layer2 + ifbridge */
132 /* PROTO_OLDBDG = 0x14, unused, old bridge */
135 /* wrapper for freeing a packet, in case we need to do more work */
137 #if defined(__linux__) || defined(_WIN32)
138 #define FREE_PKT(m) netisr_dispatch(-1, m)
140 #define FREE_PKT(m) m_freem(m)
142 #endif /* !FREE_PKT */
145 * Function definitions.
148 /* attach (arg = 1) or detach (arg = 0) hooks */
149 int ipfw_attach_hooks(int);
151 void ipfw_nat_destroy(void);
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)
166 /* In ip_fw_dynamic.c */
168 enum { /* result for matching dynamic rules */
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.
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);
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);
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);
202 /* common variables */
203 VNET_DECLARE(int, fw_one_pass);
204 #define V_fw_one_pass VNET(fw_one_pass)
206 VNET_DECLARE(int, fw_verbose);
207 #define V_fw_verbose VNET(fw_verbose)
209 VNET_DECLARE(struct ip_fw_chain, layer3_chain);
210 #define V_layer3_chain VNET(layer3_chain)
212 VNET_DECLARE(int, ipfw_vnet_ready);
213 #define V_ipfw_vnet_ready VNET(ipfw_vnet_ready)
215 VNET_DECLARE(u_int32_t, set_disable);
216 #define V_set_disable VNET(set_disable)
218 VNET_DECLARE(int, autoinc_step);
219 #define V_autoinc_step VNET(autoinc_step)
221 VNET_DECLARE(unsigned int, fw_tables_max);
222 #define V_fw_tables_max VNET(fw_tables_max)
224 VNET_DECLARE(unsigned int, fw_tables_sets);
225 #define V_fw_tables_sets VNET(fw_tables_sets)
227 struct tables_config;
231 * Here we have the structure representing an ipfw rule.
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.
237 * Given a rule pointer r:
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).
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 */
256 ipfw_insn cmd[1]; /* storage for commands */
259 #define IPFW_RULE_CNTR_SIZE (2 * sizeof(counter_u64_t))
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 )
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 )
285 struct rwlock uh_lock; /* lock for upper half */
289 /* 64-byte structure representing multi-field 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 */
304 uint32_t limit; /* O_LIMIT */
305 uint32_t zoneid; /* scope zone id for nh6 */
306 uint64_t refcnt; /* Number of references */
309 struct namedobj_instance;
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 */
322 TAILQ_HEAD(namedobjects_head, named_object);
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 */
338 typedef void (ipfw_ifc_cb)(struct ip_fw_chain *ch, void *cbdata,
342 struct named_object no;
348 TAILQ_HEAD(, ipfw_ifc) consumers;
352 TAILQ_ENTRY(ipfw_ifc) next;
353 struct ipfw_iface *iface;
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; \
366 #define IPFW_INC_DYN_COUNTER(_cntr, _bytes) do { \
368 (_cntr)->bcnt += _bytes; \
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; \
377 #define IPFW_ZERO_DYN_COUNTER(_cntr) do { \
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))
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.
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"); \
396 #define IPFW_LOCK_DESTROY(_chain) do { \
397 rw_destroy(&(_chain)->rwmtx); \
398 rw_destroy(&(_chain)->uh_lock); \
401 #define IPFW_RLOCK_ASSERT(_chain) rw_assert(&(_chain)->rwmtx, RA_RLOCKED)
402 #define IPFW_WLOCK_ASSERT(_chain) rw_assert(&(_chain)->rwmtx, RA_WLOCKED)
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)
412 #define IPFW_LOCK_INIT(_chain) do { \
413 rm_init(&(_chain)->rwmtx, "IPFW static rules"); \
414 rw_init(&(_chain)->uh_lock, "IPFW UH lock"); \
417 #define IPFW_LOCK_DESTROY(_chain) do { \
418 rm_destroy(&(_chain)->rwmtx); \
419 rw_destroy(&(_chain)->uh_lock); \
422 #define IPFW_RLOCK_ASSERT(_chain) rm_assert(&(_chain)->rwmtx, RA_RLOCKED)
423 #define IPFW_WLOCK_ASSERT(_chain) rm_assert(&(_chain)->rwmtx, RA_WLOCKED)
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)
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)
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)
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 */
448 uint8_t type; /* object type within its category */
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 */
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 */
463 /* Legacy interface support */
465 * FreeBSD 8 export rule format
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 */
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 */
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 */
484 ipfw_insn cmd[1]; /* storage for commands */
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 */
493 /* Kernel rule length */
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
500 * get user size rule length
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)
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);
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,
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);
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 {
541 sopt_handler_f *handler;
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
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 { \
556 ipfw_add_sopt_handler(c, \
557 sizeof(c) / sizeof(c[0])); \
559 #define IPFW_DEL_SOPT_HANDLER(l, c) do { \
561 ipfw_del_sopt_handler(c, \
562 sizeof(c) / sizeof(c[0])); \
565 typedef void (objhash_cb_t)(struct namedobj_instance *ni, struct named_object *,
567 typedef uint32_t (objhash_hash_f)(struct namedobj_instance *ni, void *key,
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,
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,
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);
595 /* In ip_fw_table.c */
598 typedef int (table_lookup_t)(struct table_info *ti, void *key, uint32_t keylen,
601 int ipfw_lookup_table(struct ip_fw_chain *ch, uint16_t tbl, in_addr_t addr,
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);
610 /* In ip_fw_nat.c -- XXX to be moved to ip_var.h */
612 extern struct cfg_nat *(*lookup_nat_ptr)(struct nat_list *, int);
614 typedef int ipfw_nat_t(struct ip_fw_args *, struct cfg_nat *, struct mbuf *);
615 typedef int ipfw_nat_cfg_t(struct sockopt *);
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)
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;
628 #endif /* _IPFW2_PRIVATE_H */