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_bpf_init(int);
158 void ipfw_bpf_uninit(int);
159 void ipfw_bpf_mtap2(void *, u_int, struct mbuf *);
160 void ipfw_log(struct ip_fw_chain *chain, struct ip_fw *f, u_int hlen,
161 struct ip_fw_args *args, struct mbuf *m, struct ifnet *oif,
162 u_short offset, uint32_t tablearg, struct ip *ip);
163 VNET_DECLARE(u_int64_t, norule_counter);
164 #define V_norule_counter VNET(norule_counter)
165 VNET_DECLARE(int, verbose_limit);
166 #define V_verbose_limit VNET(verbose_limit)
168 /* In ip_fw_dynamic.c */
170 enum { /* result for matching dynamic rules */
178 * The lock for dynamic rules is only used once outside the file,
179 * and only to release the result of lookup_dyn_rule().
180 * Eventually we may implement it with a callback on the function.
184 int ipfw_is_dyn_rule(struct ip_fw *rule);
185 void ipfw_expire_dyn_rules(struct ip_fw_chain *, ipfw_range_tlv *);
186 void ipfw_dyn_unlock(ipfw_dyn_rule *q);
189 struct mbuf *ipfw_send_pkt(struct mbuf *, struct ipfw_flow_id *,
190 u_int32_t, u_int32_t, int);
191 int ipfw_install_state(struct ip_fw_chain *chain, struct ip_fw *rule,
192 ipfw_insn_limit *cmd, struct ip_fw_args *args, uint32_t tablearg);
193 ipfw_dyn_rule *ipfw_lookup_dyn_rule(struct ipfw_flow_id *pkt,
194 int *match_direction, struct tcphdr *tcp, uint16_t kidx);
195 void ipfw_remove_dyn_children(struct ip_fw *rule);
196 void ipfw_get_dynamic(struct ip_fw_chain *chain, char **bp, const char *ep);
197 int ipfw_dump_states(struct ip_fw_chain *chain, struct sockopt_data *sd);
199 void ipfw_dyn_init(struct ip_fw_chain *); /* per-vnet initialization */
200 void ipfw_dyn_uninit(int); /* per-vnet deinitialization */
201 int ipfw_dyn_len(void);
202 int ipfw_dyn_get_count(void);
204 /* common variables */
205 VNET_DECLARE(int, fw_one_pass);
206 #define V_fw_one_pass VNET(fw_one_pass)
208 VNET_DECLARE(int, fw_verbose);
209 #define V_fw_verbose VNET(fw_verbose)
211 VNET_DECLARE(struct ip_fw_chain, layer3_chain);
212 #define V_layer3_chain VNET(layer3_chain)
214 VNET_DECLARE(int, ipfw_vnet_ready);
215 #define V_ipfw_vnet_ready VNET(ipfw_vnet_ready)
217 VNET_DECLARE(u_int32_t, set_disable);
218 #define V_set_disable VNET(set_disable)
220 VNET_DECLARE(int, autoinc_step);
221 #define V_autoinc_step VNET(autoinc_step)
223 VNET_DECLARE(unsigned int, fw_tables_max);
224 #define V_fw_tables_max VNET(fw_tables_max)
226 VNET_DECLARE(unsigned int, fw_tables_sets);
227 #define V_fw_tables_sets VNET(fw_tables_sets)
229 struct tables_config;
233 * Here we have the structure representing an ipfw rule.
235 * It starts with a general area
236 * followed by an array of one or more instructions, which the code
237 * accesses as an array of 32-bit values.
239 * Given a rule pointer r:
241 * r->cmd is the start of the first instruction.
242 * ACTION_PTR(r) is the start of the first action (things to do
243 * once a rule matched).
247 uint16_t act_ofs; /* offset of action in 32-bit units */
248 uint16_t cmd_len; /* # of 32-bit words in cmd */
249 uint16_t rulenum; /* rule number */
250 uint8_t set; /* rule set (0..31) */
251 uint8_t flags; /* currently unused */
252 counter_u64_t cntr; /* Pointer to rule counters */
253 uint32_t timestamp; /* tv_sec of last match */
254 uint32_t id; /* rule id */
255 uint32_t cached_id; /* used by jump_fast */
256 uint32_t cached_pos; /* used by jump_fast */
258 ipfw_insn cmd[1]; /* storage for commands */
261 #define IPFW_RULE_CNTR_SIZE (2 * sizeof(uint64_t))
266 struct ip_fw **map; /* array of rule ptrs to ease lookup */
267 uint32_t id; /* ruleset id */
268 int n_rules; /* number of static rules */
269 void *tablestate; /* runtime table info */
270 void *valuestate; /* runtime table value info */
271 int *idxmap; /* skipto array of rules */
272 void **srvstate; /* runtime service mappings */
273 #if defined( __linux__ ) || defined( _WIN32 )
276 int static_len; /* total len of static rules (v0) */
277 uint32_t gencnt; /* NAT generation count */
278 LIST_HEAD(nat_list, cfg_nat) nat; /* list of nat entries */
279 struct ip_fw *default_rule;
280 struct tables_config *tblcfg; /* tables module data */
281 void *ifcfg; /* interface module data */
282 int *idxmap_back; /* standby skipto array of rules */
283 struct namedobj_instance *srvmap; /* cfg name->number mappings */
284 #if defined( __linux__ ) || defined( _WIN32 )
287 struct rwlock uh_lock; /* lock for upper half */
291 /* 64-byte structure representing multi-field table value */
293 uint32_t tag; /* O_TAG/O_TAGGED */
294 uint32_t pipe; /* O_PIPE/O_QUEUE */
295 uint16_t divert; /* O_DIVERT/O_TEE */
296 uint16_t skipto; /* skipto, CALLRET */
297 uint32_t netgraph; /* O_NETGRAPH/O_NGTEE */
298 uint32_t fib; /* O_SETFIB */
299 uint32_t nat; /* O_NAT */
306 uint32_t limit; /* O_LIMIT */
307 uint32_t zoneid; /* scope zone id for nh6 */
308 uint64_t refcnt; /* Number of references */
312 struct named_object {
313 TAILQ_ENTRY(named_object) nn_next; /* namehash */
314 TAILQ_ENTRY(named_object) nv_next; /* valuehash */
315 char *name; /* object name */
316 uint16_t etlv; /* Export TLV id */
317 uint8_t subtype;/* object subtype within class */
318 uint8_t set; /* set object belongs to */
319 uint16_t kidx; /* object kernel index */
321 uint32_t ocnt; /* object counter for internal use */
322 uint32_t refcnt; /* number of references */
324 TAILQ_HEAD(namedobjects_head, named_object);
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 */
340 typedef void (ipfw_ifc_cb)(struct ip_fw_chain *ch, void *cbdata,
344 struct named_object no;
350 TAILQ_HEAD(, ipfw_ifc) consumers;
354 TAILQ_ENTRY(ipfw_ifc) next;
355 struct ipfw_iface *iface;
360 /* Macro for working with various counters */
361 #define IPFW_INC_RULE_COUNTER(_cntr, _bytes) do { \
362 counter_u64_add((_cntr)->cntr, 1); \
363 counter_u64_add((_cntr)->cntr + 1, _bytes); \
364 if ((_cntr)->timestamp != time_uptime) \
365 (_cntr)->timestamp = time_uptime; \
368 #define IPFW_INC_DYN_COUNTER(_cntr, _bytes) do { \
370 (_cntr)->bcnt += _bytes; \
373 #define IPFW_ZERO_RULE_COUNTER(_cntr) do { \
374 counter_u64_zero((_cntr)->cntr); \
375 counter_u64_zero((_cntr)->cntr + 1); \
376 (_cntr)->timestamp = 0; \
379 #define IPFW_ZERO_DYN_COUNTER(_cntr) do { \
384 #define TARG_VAL(ch, k, f) ((struct table_value *)((ch)->valuestate))[k].f
385 #define IP_FW_ARG_TABLEARG(ch, a, f) \
386 (((a) == IP_FW_TARG) ? TARG_VAL(ch, tablearg, f) : (a))
388 * The lock is heavily used by ip_fw2.c (the main file) and ip_fw_nat.c
389 * so the variable and the macros must be here.
392 #if defined( __linux__ ) || defined( _WIN32 )
393 #define IPFW_LOCK_INIT(_chain) do { \
394 rw_init(&(_chain)->rwmtx, "IPFW static rules"); \
395 rw_init(&(_chain)->uh_lock, "IPFW UH lock"); \
398 #define IPFW_LOCK_DESTROY(_chain) do { \
399 rw_destroy(&(_chain)->rwmtx); \
400 rw_destroy(&(_chain)->uh_lock); \
403 #define IPFW_RLOCK_ASSERT(_chain) rw_assert(&(_chain)->rwmtx, RA_RLOCKED)
404 #define IPFW_WLOCK_ASSERT(_chain) rw_assert(&(_chain)->rwmtx, RA_WLOCKED)
406 #define IPFW_RLOCK_TRACKER
407 #define IPFW_RLOCK(p) rw_rlock(&(p)->rwmtx)
408 #define IPFW_RUNLOCK(p) rw_runlock(&(p)->rwmtx)
409 #define IPFW_WLOCK(p) rw_wlock(&(p)->rwmtx)
410 #define IPFW_WUNLOCK(p) rw_wunlock(&(p)->rwmtx)
411 #define IPFW_PF_RLOCK(p) IPFW_RLOCK(p)
412 #define IPFW_PF_RUNLOCK(p) IPFW_RUNLOCK(p)
414 #define IPFW_LOCK_INIT(_chain) do { \
415 rw_init(&(_chain)->uh_lock, "IPFW UH lock"); \
418 #define IPFW_LOCK_DESTROY(_chain) do { \
419 rw_destroy(&(_chain)->uh_lock); \
422 #define IPFW_RLOCK_ASSERT(_chain) rm_assert(&V_pfil_lock, RA_RLOCKED)
423 #define IPFW_WLOCK_ASSERT(_chain) rm_assert(&V_pfil_lock, RA_WLOCKED)
425 #define IPFW_RLOCK_TRACKER struct rm_priotracker _tracker
426 #define IPFW_RLOCK(p) rm_rlock(&V_pfil_lock, &_tracker)
427 #define IPFW_RUNLOCK(p) rm_runlock(&V_pfil_lock, &_tracker)
428 #define IPFW_WLOCK(p) rm_wlock(&V_pfil_lock)
429 #define IPFW_WUNLOCK(p) rm_wunlock(&V_pfil_lock)
430 #define IPFW_PF_RLOCK(p)
431 #define IPFW_PF_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 object_opcodes; /* num of opcodes referencing objects */
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 * Tables/Objects index rewriting code
514 /* Default and maximum number of ipfw tables/objects. */
515 #define IPFW_TABLES_MAX 65536
516 #define IPFW_TABLES_DEFAULT 128
517 #define IPFW_OBJECTS_MAX 65536
518 #define IPFW_OBJECTS_DEFAULT 1024
520 #define CHAIN_TO_SRV(ch) ((ch)->srvmap)
521 #define SRV_OBJECT(ch, idx) ((ch)->srvstate[(idx)])
524 uint32_t set; /* table set */
525 uint16_t uidx; /* table index */
526 uint8_t type; /* table type */
529 int tlen; /* Total TLV size block */
530 void *tlvs; /* Pointer to first TLV */
534 * Classifier callback. Checks if @cmd opcode contains kernel object reference.
535 * If true, returns its index and type.
536 * Returns 0 if match is found, 1 overwise.
538 typedef int (ipfw_obj_rw_cl)(ipfw_insn *cmd, uint16_t *puidx, uint8_t *ptype);
540 * Updater callback. Sets kernel object reference index to @puidx
542 typedef void (ipfw_obj_rw_upd)(ipfw_insn *cmd, uint16_t puidx);
544 * Finder callback. Tries to find named object by name (specified via @ti).
545 * Stores found named object pointer in @pno.
546 * If object was not found, NULL is stored.
548 * Return 0 if input data was valid.
550 typedef int (ipfw_obj_fname_cb)(struct ip_fw_chain *ch,
551 struct tid_info *ti, struct named_object **pno);
553 * Another finder callback. Tries to findex named object by kernel index.
555 * Returns pointer to named object or NULL.
557 typedef struct named_object *(ipfw_obj_fidx_cb)(struct ip_fw_chain *ch,
560 * Object creator callback. Tries to create object specified by @ti.
561 * Stores newly-allocated object index in @pkidx.
563 * Returns 0 on success.
565 typedef int (ipfw_obj_create_cb)(struct ip_fw_chain *ch, struct tid_info *ti,
568 * Object destroy callback. Intended to free resources allocated by
569 * create_object callback.
571 typedef void (ipfw_obj_destroy_cb)(struct ip_fw_chain *ch,
572 struct named_object *no);
574 * Sets handler callback. Handles moving and swaping set of named object.
575 * SWAP_ALL moves all named objects from set `set' to `new_set' and vise versa;
576 * TEST_ALL checks that there aren't any named object with conflicting names;
577 * MOVE_ALL moves all named objects from set `set' to `new_set';
578 * COUNT_ONE used to count number of references used by object with kidx `set';
579 * TEST_ONE checks that named object with kidx `set' can be moved to `new_set`;
580 * MOVE_ONE moves named object with kidx `set' to set `new_set'.
583 SWAP_ALL = 0, TEST_ALL, MOVE_ALL, COUNT_ONE, TEST_ONE, MOVE_ONE
585 typedef int (ipfw_obj_sets_cb)(struct ip_fw_chain *ch,
586 uint16_t set, uint8_t new_set, enum ipfw_sets_cmd cmd);
589 struct opcode_obj_rewrite {
590 uint32_t opcode; /* Opcode to act upon */
591 uint32_t etlv; /* Relevant export TLV id */
592 ipfw_obj_rw_cl *classifier; /* Check if rewrite is needed */
593 ipfw_obj_rw_upd *update; /* update cmd with new value */
594 ipfw_obj_fname_cb *find_byname; /* Find named object by name */
595 ipfw_obj_fidx_cb *find_bykidx; /* Find named object by kidx */
596 ipfw_obj_create_cb *create_object; /* Create named object */
597 ipfw_obj_destroy_cb *destroy_object;/* Destroy named object */
598 ipfw_obj_sets_cb *manage_sets; /* Swap or move sets */
601 #define IPFW_ADD_OBJ_REWRITER(f, c) do { \
603 ipfw_add_obj_rewriter(c, \
604 sizeof(c) / sizeof(c[0])); \
606 #define IPFW_DEL_OBJ_REWRITER(l, c) do { \
608 ipfw_del_obj_rewriter(c, \
609 sizeof(c) / sizeof(c[0])); \
612 /* In ip_fw_iface.c */
613 int ipfw_iface_init(void);
614 void ipfw_iface_destroy(void);
615 void vnet_ipfw_iface_destroy(struct ip_fw_chain *ch);
616 int ipfw_iface_ref(struct ip_fw_chain *ch, char *name,
617 struct ipfw_ifc *ic);
618 void ipfw_iface_unref(struct ip_fw_chain *ch, struct ipfw_ifc *ic);
619 void ipfw_iface_add_notify(struct ip_fw_chain *ch, struct ipfw_ifc *ic);
620 void ipfw_iface_del_notify(struct ip_fw_chain *ch, struct ipfw_ifc *ic);
622 /* In ip_fw_sockopt.c */
623 void ipfw_init_skipto_cache(struct ip_fw_chain *chain);
624 void ipfw_destroy_skipto_cache(struct ip_fw_chain *chain);
625 int ipfw_find_rule(struct ip_fw_chain *chain, uint32_t key, uint32_t id);
626 int ipfw_ctl3(struct sockopt *sopt);
627 int ipfw_chk(struct ip_fw_args *args);
628 void ipfw_reap_add(struct ip_fw_chain *chain, struct ip_fw **head,
630 void ipfw_reap_rules(struct ip_fw *head);
631 void ipfw_init_counters(void);
632 void ipfw_destroy_counters(void);
633 struct ip_fw *ipfw_alloc_rule(struct ip_fw_chain *chain, size_t rulesize);
634 int ipfw_match_range(struct ip_fw *rule, ipfw_range_tlv *rt);
636 typedef int (sopt_handler_f)(struct ip_fw_chain *ch,
637 ip_fw3_opheader *op3, struct sockopt_data *sd);
638 struct ipfw_sopt_handler {
642 sopt_handler_f *handler;
645 #define HDIR_SET 0x01 /* Handler is used to set some data */
646 #define HDIR_GET 0x02 /* Handler is used to retrieve data */
647 #define HDIR_BOTH HDIR_GET|HDIR_SET
649 void ipfw_init_sopt_handler(void);
650 void ipfw_destroy_sopt_handler(void);
651 void ipfw_add_sopt_handler(struct ipfw_sopt_handler *sh, size_t count);
652 int ipfw_del_sopt_handler(struct ipfw_sopt_handler *sh, size_t count);
653 caddr_t ipfw_get_sopt_space(struct sockopt_data *sd, size_t needed);
654 caddr_t ipfw_get_sopt_header(struct sockopt_data *sd, size_t needed);
655 #define IPFW_ADD_SOPT_HANDLER(f, c) do { \
657 ipfw_add_sopt_handler(c, \
658 sizeof(c) / sizeof(c[0])); \
660 #define IPFW_DEL_SOPT_HANDLER(l, c) do { \
662 ipfw_del_sopt_handler(c, \
663 sizeof(c) / sizeof(c[0])); \
666 struct namedobj_instance;
667 typedef int (objhash_cb_t)(struct namedobj_instance *ni, struct named_object *,
669 typedef uint32_t (objhash_hash_f)(struct namedobj_instance *ni, const void *key,
671 typedef int (objhash_cmp_f)(struct named_object *no, const void *key,
673 struct namedobj_instance *ipfw_objhash_create(uint32_t items);
674 void ipfw_objhash_destroy(struct namedobj_instance *);
675 void ipfw_objhash_bitmap_alloc(uint32_t items, void **idx, int *pblocks);
676 void ipfw_objhash_bitmap_merge(struct namedobj_instance *ni,
677 void **idx, int *blocks);
678 void ipfw_objhash_bitmap_swap(struct namedobj_instance *ni,
679 void **idx, int *blocks);
680 void ipfw_objhash_bitmap_free(void *idx, int blocks);
681 void ipfw_objhash_set_hashf(struct namedobj_instance *ni, objhash_hash_f *f);
682 struct named_object *ipfw_objhash_lookup_name(struct namedobj_instance *ni,
683 uint32_t set, char *name);
684 struct named_object *ipfw_objhash_lookup_name_type(struct namedobj_instance *ni,
685 uint32_t set, uint32_t type, const char *name);
686 struct named_object *ipfw_objhash_lookup_kidx(struct namedobj_instance *ni,
688 int ipfw_objhash_same_name(struct namedobj_instance *ni, struct named_object *a,
689 struct named_object *b);
690 void ipfw_objhash_add(struct namedobj_instance *ni, struct named_object *no);
691 void ipfw_objhash_del(struct namedobj_instance *ni, struct named_object *no);
692 uint32_t ipfw_objhash_count(struct namedobj_instance *ni);
693 uint32_t ipfw_objhash_count_type(struct namedobj_instance *ni, uint16_t type);
694 int ipfw_objhash_foreach(struct namedobj_instance *ni, objhash_cb_t *f,
696 int ipfw_objhash_foreach_type(struct namedobj_instance *ni, objhash_cb_t *f,
697 void *arg, uint16_t type);
698 int ipfw_objhash_free_idx(struct namedobj_instance *ni, uint16_t idx);
699 int ipfw_objhash_alloc_idx(void *n, uint16_t *pidx);
700 void ipfw_objhash_set_funcs(struct namedobj_instance *ni,
701 objhash_hash_f *hash_f, objhash_cmp_f *cmp_f);
702 int ipfw_objhash_find_type(struct namedobj_instance *ni, struct tid_info *ti,
703 uint32_t etlv, struct named_object **pno);
704 void ipfw_export_obj_ntlv(struct named_object *no, ipfw_obj_ntlv *ntlv);
705 ipfw_obj_ntlv *ipfw_find_name_tlv_type(void *tlvs, int len, uint16_t uidx,
707 void ipfw_init_obj_rewriter(void);
708 void ipfw_destroy_obj_rewriter(void);
709 void ipfw_add_obj_rewriter(struct opcode_obj_rewrite *rw, size_t count);
710 int ipfw_del_obj_rewriter(struct opcode_obj_rewrite *rw, size_t count);
712 int create_objects_compat(struct ip_fw_chain *ch, ipfw_insn *cmd,
713 struct obj_idx *oib, struct obj_idx *pidx, struct tid_info *ti);
714 void update_opcode_kidx(ipfw_insn *cmd, uint16_t idx);
715 int classify_opcode_kidx(ipfw_insn *cmd, uint16_t *puidx);
716 void ipfw_init_srv(struct ip_fw_chain *ch);
717 void ipfw_destroy_srv(struct ip_fw_chain *ch);
718 int ipfw_check_object_name_generic(const char *name);
719 int ipfw_obj_manage_sets(struct namedobj_instance *ni, uint16_t type,
720 uint16_t set, uint8_t new_set, enum ipfw_sets_cmd cmd);
722 /* In ip_fw_eaction.c */
723 typedef int (ipfw_eaction_t)(struct ip_fw_chain *ch, struct ip_fw_args *args,
724 ipfw_insn *cmd, int *done);
725 int ipfw_eaction_init(struct ip_fw_chain *ch, int first);
726 void ipfw_eaction_uninit(struct ip_fw_chain *ch, int last);
728 uint16_t ipfw_add_eaction(struct ip_fw_chain *ch, ipfw_eaction_t handler,
730 int ipfw_del_eaction(struct ip_fw_chain *ch, uint16_t eaction_id);
731 int ipfw_run_eaction(struct ip_fw_chain *ch, struct ip_fw_args *args,
732 ipfw_insn *cmd, int *done);
734 /* In ip_fw_table.c */
737 typedef int (table_lookup_t)(struct table_info *ti, void *key, uint32_t keylen,
740 int ipfw_lookup_table(struct ip_fw_chain *ch, uint16_t tbl, uint16_t plen,
741 void *paddr, uint32_t *val);
742 struct named_object *ipfw_objhash_lookup_table_kidx(struct ip_fw_chain *ch,
744 int ipfw_ref_table(struct ip_fw_chain *ch, ipfw_obj_ntlv *ntlv, uint16_t *kidx);
745 void ipfw_unref_table(struct ip_fw_chain *ch, uint16_t kidx);
746 int ipfw_init_tables(struct ip_fw_chain *ch, int first);
747 int ipfw_resize_tables(struct ip_fw_chain *ch, unsigned int ntables);
748 int ipfw_switch_tables_namespace(struct ip_fw_chain *ch, unsigned int nsets);
749 void ipfw_destroy_tables(struct ip_fw_chain *ch, int last);
751 /* In ip_fw_nat.c -- XXX to be moved to ip_var.h */
753 extern struct cfg_nat *(*lookup_nat_ptr)(struct nat_list *, int);
755 typedef int ipfw_nat_t(struct ip_fw_args *, struct cfg_nat *, struct mbuf *);
756 typedef int ipfw_nat_cfg_t(struct sockopt *);
758 VNET_DECLARE(int, ipfw_nat_ready);
759 #define V_ipfw_nat_ready VNET(ipfw_nat_ready)
760 #define IPFW_NAT_LOADED (V_ipfw_nat_ready)
762 extern ipfw_nat_t *ipfw_nat_ptr;
763 extern ipfw_nat_cfg_t *ipfw_nat_cfg_ptr;
764 extern ipfw_nat_cfg_t *ipfw_nat_del_ptr;
765 extern ipfw_nat_cfg_t *ipfw_nat_get_cfg_ptr;
766 extern ipfw_nat_cfg_t *ipfw_nat_get_log_ptr;
768 /* Helper functions for IP checksum adjustment */
769 static __inline uint16_t
770 cksum_add(uint16_t sum, uint16_t a)
775 return (res + (res < a));
778 static __inline uint16_t
779 cksum_adjust(uint16_t oldsum, uint16_t old, uint16_t new)
782 return (~cksum_add(cksum_add(~oldsum, ~old), new));
786 #endif /* _IPFW2_PRIVATE_H */