xref: /freebsd-12.1/contrib/ipfilter/tools/ipnat.c (revision 2000bd83) 
1 /*	$FreeBSD$	*/
2 
3 /*
4  * Copyright (C) 2012 by Darren Reed.
5  *
6  * See the IPFILTER.LICENCE file for details on licencing.
7  *
8  * Added redirect stuff and a variety of bug fixes. ([email protected])
9  */
10 #include <stdio.h>
11 #include <string.h>
12 #include <fcntl.h>
13 #include <errno.h>
14 #include <sys/types.h>
15 #if !defined(__SVR4)
16 #include <strings.h>
17 #else
18 #include <sys/byteorder.h>
19 #endif
20 #include <sys/time.h>
21 #include <sys/param.h>
22 #include <stdlib.h>
23 #include <unistd.h>
24 #include <stddef.h>
25 #include <sys/file.h>
26 #define _KERNEL
27 #include <sys/uio.h>
28 #undef _KERNEL
29 #include <sys/socket.h>
30 #include <sys/ioctl.h>
31 #if defined(sun) && defined(__SVR4)
32 # include <sys/ioccom.h>
33 # include <sys/sysmacros.h>
34 #endif
35 #include <netinet/in.h>
36 #include <netinet/in_systm.h>
37 #include <netinet/ip.h>
38 #include <netinet/tcp.h>
39 #include <net/if.h>
40 #include <netdb.h>
41 #include <arpa/nameser.h>
42 #include <arpa/inet.h>
43 #include <resolv.h>
44 #include <ctype.h>
45 # include <nlist.h>
46 #include "ipf.h"
47 #include "netinet/ipl.h"
48 #include "kmem.h"
49 
50 
51 # define	STRERROR(x)	strerror(x)
52 
53 #if !defined(lint)
54 static const char sccsid[] ="@(#)ipnat.c	1.9 6/5/96 (C) 1993 Darren Reed";
55 static const char rcsid[] = "@(#)$Id$";
56 #endif
57 
58 
59 #if	SOLARIS
60 #define	bzero(a,b)	memset(a,0,b)
61 #endif
62 int	use_inet6 = 0;
63 char	thishost[MAXHOSTNAMELEN];
64 
65 extern	char	*optarg;
66 
67 void	dostats __P((int, natstat_t *, int, int, int *));
68 void	dotable __P((natstat_t *, int, int, int, char *));
69 void	flushtable __P((int, int, int *));
70 void	usage __P((char *));
71 int	main __P((int, char*[]));
72 void	showhostmap __P((natstat_t *nsp));
73 void	natstat_dead __P((natstat_t *, char *));
74 void	dostats_live __P((int, natstat_t *, int, int *));
75 void	showhostmap_dead __P((natstat_t *));
76 void	showhostmap_live __P((int, natstat_t *));
77 void	dostats_dead __P((natstat_t *, int, int *));
78 int	nat_matcharray __P((nat_t *, int *));
79 
80 int		opts;
81 int		nohdrfields = 0;
82 wordtab_t	*nat_fields = NULL;
83 
84 void usage(name)
85 	char *name;
86 {
87 	fprintf(stderr, "Usage: %s [-CFhlnrRsv] [-f filename]\n", name);
88 	exit(1);
89 }
90 
91 
92 int main(argc, argv)
93 	int argc;
94 	char *argv[];
95 {
96 	int fd, c, mode, *natfilter;
97 	char *file, *core, *kernel;
98 	natstat_t ns, *nsp;
99 	ipfobj_t obj;
100 
101 	fd = -1;
102 	opts = 0;
103 	nsp = &ns;
104 	file = NULL;
105 	core = NULL;
106 	kernel = NULL;
107 	mode = O_RDWR;
108 	natfilter = NULL;
109 
110 	assigndefined(getenv("IPNAT_PREDEFINED"));
111 
112 	while ((c = getopt(argc, argv, "CdFf:hlm:M:N:nO:prRsv")) != -1)
113 		switch (c)
114 		{
115 		case 'C' :
116 			opts |= OPT_CLEAR;
117 			break;
118 		case 'd' :
119 			opts |= OPT_DEBUG;
120 			break;
121 		case 'f' :
122 			file = optarg;
123 			break;
124 		case 'F' :
125 			opts |= OPT_FLUSH;
126 			break;
127 		case 'h' :
128 			opts |=OPT_HITS;
129 			break;
130 		case 'l' :
131 			opts |= OPT_LIST;
132 			mode = O_RDONLY;
133 			break;
134 		case 'm' :
135 			natfilter = parseipfexpr(optarg, NULL);
136 			break;
137 		case 'M' :
138 			core = optarg;
139 			break;
140 		case 'N' :
141 			kernel = optarg;
142 			break;
143 		case 'n' :
144 			opts |= OPT_DONOTHING|OPT_DONTOPEN;
145 			mode = O_RDONLY;
146 			break;
147 		case 'O' :
148 			nat_fields = parsefields(natfields, optarg);
149 			break;
150 		case 'p' :
151 			opts |= OPT_PURGE;
152 			break;
153 		case 'R' :
154 			opts |= OPT_NORESOLVE;
155 			break;
156 		case 'r' :
157 			opts |= OPT_REMOVE;
158 			break;
159 		case 's' :
160 			opts |= OPT_STAT;
161 			mode = O_RDONLY;
162 			break;
163 		case 'v' :
164 			opts |= OPT_VERBOSE;
165 			break;
166 		default :
167 			usage(argv[0]);
168 		}
169 
170 	if (((opts & OPT_PURGE) != 0) && ((opts & OPT_REMOVE) == 0)) {
171 		(void) fprintf(stderr, "%s: -p must be used with -r\n",
172 			       argv[0]);
173 		exit(1);
174 	}
175 
176 	initparse();
177 
178 	if ((kernel != NULL) || (core != NULL)) {
179 		(void) setgid(getgid());
180 		(void) setuid(getuid());
181 	}
182 
183 	if (!(opts & OPT_DONOTHING)) {
184 		if (((fd = open(IPNAT_NAME, mode)) == -1) &&
185 		    ((fd = open(IPNAT_NAME, O_RDONLY)) == -1)) {
186 			(void) fprintf(stderr, "%s: open: %s\n", IPNAT_NAME,
187 				STRERROR(errno));
188 			exit(1);
189 		}
190 	}
191 
192 	bzero((char *)&ns, sizeof(ns));
193 
194 	if ((opts & OPT_DONOTHING) == 0) {
195 		if (checkrev(IPL_NAME) == -1) {
196 			fprintf(stderr, "User/kernel version check failed\n");
197 			exit(1);
198 		}
199 	}
200 
201 	if (!(opts & OPT_DONOTHING) && (kernel == NULL) && (core == NULL)) {
202 		bzero((char *)&obj, sizeof(obj));
203 		obj.ipfo_rev = IPFILTER_VERSION;
204 		obj.ipfo_type = IPFOBJ_NATSTAT;
205 		obj.ipfo_size = sizeof(*nsp);
206 		obj.ipfo_ptr = (void *)nsp;
207 		if (ioctl(fd, SIOCGNATS, &obj) == -1) {
208 			ipferror(fd, "ioctl(SIOCGNATS)");
209 			exit(1);
210 		}
211 		(void) setgid(getgid());
212 		(void) setuid(getuid());
213 	} else if ((kernel != NULL) || (core != NULL)) {
214 		if (openkmem(kernel, core) == -1)
215 			exit(1);
216 
217 		natstat_dead(nsp, kernel);
218 		if (opts & (OPT_LIST|OPT_STAT))
219 			dostats(fd, nsp, opts, 0, natfilter);
220 		exit(0);
221 	}
222 
223 	if (opts & (OPT_FLUSH|OPT_CLEAR))
224 		flushtable(fd, opts, natfilter);
225 	if (file) {
226 		return ipnat_parsefile(fd, ipnat_addrule, ioctl, file);
227 	}
228 	if (opts & (OPT_LIST|OPT_STAT))
229 		dostats(fd, nsp, opts, 1, natfilter);
230 	return 0;
231 }
232 
233 
234 /*
235  * Read NAT statistic information in using a symbol table and memory file
236  * rather than doing ioctl's.
237  */
238 void natstat_dead(nsp, kernel)
239 	natstat_t *nsp;
240 	char *kernel;
241 {
242 	struct nlist nat_nlist[10] = {
243 		{ "nat_table" },		/* 0 */
244 		{ "nat_list" },
245 		{ "maptable" },
246 		{ "ipf_nattable_sz" },
247 		{ "ipf_natrules_sz" },
248 		{ "ipf_rdrrules_sz" },		/* 5 */
249 		{ "ipf_hostmap_sz" },
250 		{ "nat_instances" },
251 		{ NULL }
252 	};
253 	void *tables[2];
254 
255 	if (nlist(kernel, nat_nlist) == -1) {
256 		fprintf(stderr, "nlist error\n");
257 		return;
258 	}
259 
260 	/*
261 	 * Normally the ioctl copies all of these values into the structure
262 	 * for us, before returning it to userland, so here we must copy each
263 	 * one in individually.
264 	 */
265 	kmemcpy((char *)&tables, nat_nlist[0].n_value, sizeof(tables));
266 	nsp->ns_side[0].ns_table = tables[0];
267 	nsp->ns_side[1].ns_table = tables[1];
268 
269 	kmemcpy((char *)&nsp->ns_list, nat_nlist[1].n_value,
270 		sizeof(nsp->ns_list));
271 	kmemcpy((char *)&nsp->ns_maptable, nat_nlist[2].n_value,
272 		sizeof(nsp->ns_maptable));
273 	kmemcpy((char *)&nsp->ns_nattab_sz, nat_nlist[3].n_value,
274 		sizeof(nsp->ns_nattab_sz));
275 	kmemcpy((char *)&nsp->ns_rultab_sz, nat_nlist[4].n_value,
276 		sizeof(nsp->ns_rultab_sz));
277 	kmemcpy((char *)&nsp->ns_rdrtab_sz, nat_nlist[5].n_value,
278 		sizeof(nsp->ns_rdrtab_sz));
279 	kmemcpy((char *)&nsp->ns_hostmap_sz, nat_nlist[6].n_value,
280 		sizeof(nsp->ns_hostmap_sz));
281 	kmemcpy((char *)&nsp->ns_instances, nat_nlist[7].n_value,
282 		sizeof(nsp->ns_instances));
283 }
284 
285 
286 /*
287  * Issue an ioctl to flush either the NAT rules table or the active mapping
288  * table or both.
289  */
290 void flushtable(fd, opts, match)
291 	int fd, opts, *match;
292 {
293 	int n = 0;
294 
295 	if (opts & OPT_FLUSH) {
296 		n = 0;
297 		if (!(opts & OPT_DONOTHING)) {
298 			if (match != NULL) {
299 				ipfobj_t obj;
300 
301 				obj.ipfo_rev = IPFILTER_VERSION;
302 				obj.ipfo_size = match[0] * sizeof(int);
303 				obj.ipfo_type = IPFOBJ_IPFEXPR;
304 				obj.ipfo_ptr = match;
305 				if (ioctl(fd, SIOCMATCHFLUSH, &obj) == -1) {
306 					ipferror(fd, "ioctl(SIOCMATCHFLUSH)");
307 					n = -1;
308 				} else {
309 					n = obj.ipfo_retval;
310 				}
311 			} else if (ioctl(fd, SIOCIPFFL, &n) == -1) {
312 				ipferror(fd, "ioctl(SIOCIPFFL)");
313 				n = -1;
314 			}
315 		}
316 		if (n >= 0)
317 			printf("%d entries flushed from NAT table\n", n);
318 	}
319 
320 	if (opts & OPT_CLEAR) {
321 		n = 1;
322 		if (!(opts & OPT_DONOTHING) && ioctl(fd, SIOCIPFFL, &n) == -1)
323 			ipferror(fd, "ioctl(SIOCCNATL)");
324 		else
325 			printf("%d entries flushed from NAT list\n", n);
326 	}
327 }
328 
329 
330 /*
331  * Display NAT statistics.
332  */
333 void dostats_dead(nsp, opts, filter)
334 	natstat_t *nsp;
335 	int opts, *filter;
336 {
337 	nat_t *np, nat;
338 	ipnat_t	ipn;
339 	int i;
340 
341 	if (nat_fields == NULL) {
342 		printf("List of active MAP/Redirect filters:\n");
343 		while (nsp->ns_list) {
344 			if (kmemcpy((char *)&ipn, (long)nsp->ns_list,
345 				    sizeof(ipn))) {
346 				perror("kmemcpy");
347 				break;
348 			}
349 			if (opts & OPT_HITS)
350 				printf("%lu ", ipn.in_hits);
351 			printnat(&ipn, opts & (OPT_DEBUG|OPT_VERBOSE));
352 			nsp->ns_list = ipn.in_next;
353 		}
354 	}
355 
356 	if (nat_fields == NULL) {
357 		printf("\nList of active sessions:\n");
358 
359 	} else if (nohdrfields == 0) {
360 		for (i = 0; nat_fields[i].w_value != 0; i++) {
361 			printfieldhdr(natfields, nat_fields + i);
362 			if (nat_fields[i + 1].w_value != 0)
363 				printf("\t");
364 		}
365 		printf("\n");
366 	}
367 
368 	for (np = nsp->ns_instances; np; np = nat.nat_next) {
369 		if (kmemcpy((char *)&nat, (long)np, sizeof(nat)))
370 			break;
371 		if ((filter != NULL) && (nat_matcharray(&nat, filter) == 0))
372 			continue;
373 		if (nat_fields != NULL) {
374 			for (i = 0; nat_fields[i].w_value != 0; i++) {
375 				printnatfield(&nat, nat_fields[i].w_value);
376 				if (nat_fields[i + 1].w_value != 0)
377 					printf("\t");
378 			}
379 			printf("\n");
380 		} else {
381 			printactivenat(&nat, opts, nsp->ns_ticks);
382 			if (nat.nat_aps) {
383 				int proto;
384 
385 				if (nat.nat_dir & NAT_OUTBOUND)
386 					proto = nat.nat_pr[1];
387 				else
388 					proto = nat.nat_pr[0];
389 				printaps(nat.nat_aps, opts, proto);
390 			}
391 		}
392 	}
393 
394 	if (opts & OPT_VERBOSE)
395 		showhostmap_dead(nsp);
396 }
397 
398 
399 void dotable(nsp, fd, alive, which, side)
400 	natstat_t *nsp;
401 	int fd, alive, which;
402 	char *side;
403 {
404 	int sz, i, used, maxlen, minlen, totallen;
405 	ipftable_t table;
406 	u_int *buckets;
407 	ipfobj_t obj;
408 
409 	sz = sizeof(*buckets) * nsp->ns_nattab_sz;
410 	buckets = (u_int *)malloc(sz);
411 	if (buckets == NULL) {
412 		fprintf(stderr,
413 			"cannot allocate memory (%d) for buckets\n", sz);
414 		return;
415 	}
416 
417 	obj.ipfo_rev = IPFILTER_VERSION;
418 	obj.ipfo_type = IPFOBJ_GTABLE;
419 	obj.ipfo_size = sizeof(table);
420 	obj.ipfo_ptr = &table;
421 
422 	if (which == 0) {
423 		table.ita_type = IPFTABLE_BUCKETS_NATIN;
424 	} else if (which == 1) {
425 		table.ita_type = IPFTABLE_BUCKETS_NATOUT;
426 	}
427 	table.ita_table = buckets;
428 
429 	if (alive) {
430 		if (ioctl(fd, SIOCGTABL, &obj) != 0) {
431 			ipferror(fd, "SIOCFTABL");
432 			free(buckets);
433 			return;
434 		}
435 	} else {
436 		if (kmemcpy((char *)buckets, (u_long)nsp->ns_nattab_sz, sz)) {
437 			free(buckets);
438 			return;
439 		}
440 	}
441 
442 	minlen = nsp->ns_side[which].ns_inuse;
443 	totallen = 0;
444 	maxlen = 0;
445 	used = 0;
446 
447 	for (i = 0; i < nsp->ns_nattab_sz; i++) {
448 		if (buckets[i] > maxlen)
449 			maxlen = buckets[i];
450 		if (buckets[i] < minlen)
451 			minlen = buckets[i];
452 		if (buckets[i] != 0)
453 			used++;
454 		totallen += buckets[i];
455 	}
456 
457 	printf("%d%%\thash efficiency %s\n",
458 	       totallen ? used * 100 / totallen : 0, side);
459 	printf("%2.2f%%\tbucket usage %s\n",
460 	       ((float)used / nsp->ns_nattab_sz) * 100.0, side);
461 	printf("%d\tminimal length %s\n", minlen, side);
462 	printf("%d\tmaximal length %s\n", maxlen, side);
463 	printf("%.3f\taverage length %s\n",
464 	       used ? ((float)totallen / used) : 0.0, side);
465 
466 	free(buckets);
467 }
468 
469 
470 void dostats(fd, nsp, opts, alive, filter)
471 	natstat_t *nsp;
472 	int fd, opts, alive, *filter;
473 {
474 	/*
475 	 * Show statistics ?
476 	 */
477 	if (opts & OPT_STAT) {
478 		printnatside("in", &nsp->ns_side[0]);
479 		dotable(nsp, fd, alive, 0, "in");
480 
481 		printnatside("out", &nsp->ns_side[1]);
482 		dotable(nsp, fd, alive, 1, "out");
483 
484 		printf("%lu\tlog successes\n", nsp->ns_side[0].ns_log);
485 		printf("%lu\tlog failures\n", nsp->ns_side[1].ns_log);
486 		printf("%lu\tadded in\n%lu\tadded out\n",
487 			nsp->ns_side[0].ns_added,
488 			nsp->ns_side[1].ns_added);
489 		printf("%u\tactive\n", nsp->ns_active);
490 		printf("%lu\ttransparent adds\n", nsp->ns_addtrpnt);
491 		printf("%lu\tdivert build\n", nsp->ns_divert_build);
492 		printf("%lu\texpired\n", nsp->ns_expire);
493 		printf("%lu\tflush all\n", nsp->ns_flush_all);
494 		printf("%lu\tflush closing\n", nsp->ns_flush_closing);
495 		printf("%lu\tflush queue\n", nsp->ns_flush_queue);
496 		printf("%lu\tflush state\n", nsp->ns_flush_state);
497 		printf("%lu\tflush timeout\n", nsp->ns_flush_timeout);
498 		printf("%lu\thostmap new\n", nsp->ns_hm_new);
499 		printf("%lu\thostmap fails\n", nsp->ns_hm_newfail);
500 		printf("%lu\thostmap add\n", nsp->ns_hm_addref);
501 		printf("%lu\thostmap NULL rule\n", nsp->ns_hm_nullnp);
502 		printf("%lu\tlog ok\n", nsp->ns_log_ok);
503 		printf("%lu\tlog fail\n", nsp->ns_log_fail);
504 		printf("%u\torphan count\n", nsp->ns_orphans);
505 		printf("%u\trule count\n", nsp->ns_rules);
506 		printf("%u\tmap rules\n", nsp->ns_rules_map);
507 		printf("%u\trdr rules\n", nsp->ns_rules_rdr);
508 		printf("%u\twilds\n", nsp->ns_wilds);
509 		if (opts & OPT_VERBOSE)
510 			printf("list %p\n", nsp->ns_list);
511 	}
512 
513 	if (opts & OPT_LIST) {
514 		if (alive)
515 			dostats_live(fd, nsp, opts, filter);
516 		else
517 			dostats_dead(nsp, opts, filter);
518 	}
519 }
520 
521 
522 /*
523  * Display NAT statistics.
524  */
525 void dostats_live(fd, nsp, opts, filter)
526 	natstat_t *nsp;
527 	int fd, opts, *filter;
528 {
529 	ipfgeniter_t iter;
530 	char buffer[2000];
531 	ipfobj_t obj;
532 	ipnat_t	*ipn;
533 	nat_t nat;
534 	int i;
535 
536 	bzero((char *)&obj, sizeof(obj));
537 	obj.ipfo_rev = IPFILTER_VERSION;
538 	obj.ipfo_type = IPFOBJ_GENITER;
539 	obj.ipfo_size = sizeof(iter);
540 	obj.ipfo_ptr = &iter;
541 
542 	iter.igi_type = IPFGENITER_IPNAT;
543 	iter.igi_nitems = 1;
544 	iter.igi_data = buffer;
545 	ipn = (ipnat_t *)buffer;
546 
547 	/*
548 	 * Show list of NAT rules and NAT sessions ?
549 	 */
550 	if (nat_fields == NULL) {
551 		printf("List of active MAP/Redirect filters:\n");
552 		while (nsp->ns_list) {
553 			if (ioctl(fd, SIOCGENITER, &obj) == -1)
554 				break;
555 			if (opts & OPT_HITS)
556 				printf("%lu ", ipn->in_hits);
557 			printnat(ipn, opts & (OPT_DEBUG|OPT_VERBOSE));
558 			nsp->ns_list = ipn->in_next;
559 		}
560 	}
561 
562 	if (nat_fields == NULL) {
563 		printf("\nList of active sessions:\n");
564 
565 	} else if (nohdrfields == 0) {
566 		for (i = 0; nat_fields[i].w_value != 0; i++) {
567 			printfieldhdr(natfields, nat_fields + i);
568 			if (nat_fields[i + 1].w_value != 0)
569 				printf("\t");
570 		}
571 		printf("\n");
572 	}
573 
574 	i = IPFGENITER_IPNAT;
575 	(void) ioctl(fd,SIOCIPFDELTOK, &i);
576 
577 
578 	iter.igi_type = IPFGENITER_NAT;
579 	iter.igi_nitems = 1;
580 	iter.igi_data = &nat;
581 
582 	while (nsp->ns_instances != NULL) {
583 		if (ioctl(fd, SIOCGENITER, &obj) == -1)
584 			break;
585 		if ((filter != NULL) && (nat_matcharray(&nat, filter) == 0))
586 			continue;
587 		if (nat_fields != NULL) {
588 			for (i = 0; nat_fields[i].w_value != 0; i++) {
589 				printnatfield(&nat, nat_fields[i].w_value);
590 				if (nat_fields[i + 1].w_value != 0)
591 					printf("\t");
592 			}
593 			printf("\n");
594 		} else {
595 			printactivenat(&nat, opts, nsp->ns_ticks);
596 			if (nat.nat_aps) {
597 				int proto;
598 
599 				if (nat.nat_dir & NAT_OUTBOUND)
600 					proto = nat.nat_pr[1];
601 				else
602 					proto = nat.nat_pr[0];
603 				printaps(nat.nat_aps, opts, proto);
604 			}
605 		}
606 		nsp->ns_instances = nat.nat_next;
607 	}
608 
609 	if (opts & OPT_VERBOSE)
610 		showhostmap_live(fd, nsp);
611 
612 	i = IPFGENITER_NAT;
613 	(void) ioctl(fd,SIOCIPFDELTOK, &i);
614 }
615 
616 
617 /*
618  * Display the active host mapping table.
619  */
620 void showhostmap_dead(nsp)
621 	natstat_t *nsp;
622 {
623 	hostmap_t hm, *hmp, **maptable;
624 	u_int hv;
625 
626 	printf("\nList of active host mappings:\n");
627 
628 	maptable = (hostmap_t **)malloc(sizeof(hostmap_t *) *
629 					nsp->ns_hostmap_sz);
630 	if (kmemcpy((char *)maptable, (u_long)nsp->ns_maptable,
631 		    sizeof(hostmap_t *) * nsp->ns_hostmap_sz)) {
632 		perror("kmemcpy (maptable)");
633 		return;
634 	}
635 
636 	for (hv = 0; hv < nsp->ns_hostmap_sz; hv++) {
637 		hmp = maptable[hv];
638 
639 		while (hmp) {
640 			if (kmemcpy((char *)&hm, (u_long)hmp, sizeof(hm))) {
641 				perror("kmemcpy (hostmap)");
642 				return;
643 			}
644 
645 			printhostmap(&hm, hv);
646 			hmp = hm.hm_next;
647 		}
648 	}
649 	free(maptable);
650 }
651 
652 
653 /*
654  * Display the active host mapping table.
655  */
656 void showhostmap_live(fd, nsp)
657 	int fd;
658 	natstat_t *nsp;
659 {
660 	ipfgeniter_t iter;
661 	hostmap_t hm;
662 	ipfobj_t obj;
663 	int i;
664 
665 	bzero((char *)&obj, sizeof(obj));
666 	obj.ipfo_rev = IPFILTER_VERSION;
667 	obj.ipfo_type = IPFOBJ_GENITER;
668 	obj.ipfo_size = sizeof(iter);
669 	obj.ipfo_ptr = &iter;
670 
671 	iter.igi_type = IPFGENITER_HOSTMAP;
672 	iter.igi_nitems = 1;
673 	iter.igi_data = &hm;
674 
675 	printf("\nList of active host mappings:\n");
676 
677 	while (nsp->ns_maplist != NULL) {
678 		if (ioctl(fd, SIOCGENITER, &obj) == -1)
679 			break;
680 		printhostmap(&hm, hm.hm_hv);
681 		nsp->ns_maplist = hm.hm_next;
682 	}
683 
684 	i = IPFGENITER_HOSTMAP;
685 	(void) ioctl(fd,SIOCIPFDELTOK, &i);
686 }
687 
688 
689 int nat_matcharray(nat, array)
690 	nat_t *nat;
691 	int *array;
692 {
693 	int i, n, *x, rv, p;
694 	ipfexp_t *e;
695 
696 	rv = 0;
697 	n = array[0];
698 	x = array + 1;
699 
700 	for (; n > 0; x += 3 + x[3], rv = 0) {
701 		e = (ipfexp_t *)x;
702 		if (e->ipfe_cmd == IPF_EXP_END)
703 			break;
704 		n -= e->ipfe_size;
705 
706 		p = e->ipfe_cmd >> 16;
707 		if ((p != 0) && (p != nat->nat_pr[1]))
708 			break;
709 
710 		switch (e->ipfe_cmd)
711 		{
712 		case IPF_EXP_IP_PR :
713 			for (i = 0; !rv && i < e->ipfe_narg; i++) {
714 				rv |= (nat->nat_pr[1] == e->ipfe_arg0[i]);
715 			}
716 			break;
717 
718 		case IPF_EXP_IP_SRCADDR :
719 			if (nat->nat_v[0] != 4)
720 				break;
721 			for (i = 0; !rv && i < e->ipfe_narg; i++) {
722 				rv |= ((nat->nat_osrcaddr &
723 					e->ipfe_arg0[i * 2 + 1]) ==
724 				       e->ipfe_arg0[i * 2]) ||
725 				      ((nat->nat_nsrcaddr &
726 					e->ipfe_arg0[i * 2 + 1]) ==
727 				       e->ipfe_arg0[i * 2]);
728 			}
729 			break;
730 
731 		case IPF_EXP_IP_DSTADDR :
732 			if (nat->nat_v[0] != 4)
733 				break;
734 			for (i = 0; !rv && i < e->ipfe_narg; i++) {
735 				rv |= ((nat->nat_odstaddr &
736 					e->ipfe_arg0[i * 2 + 1]) ==
737 				       e->ipfe_arg0[i * 2]) ||
738 				      ((nat->nat_ndstaddr &
739 					e->ipfe_arg0[i * 2 + 1]) ==
740 				       e->ipfe_arg0[i * 2]);
741 			}
742 			break;
743 
744 		case IPF_EXP_IP_ADDR :
745 			if (nat->nat_v[0] != 4)
746 				break;
747 			for (i = 0; !rv && i < e->ipfe_narg; i++) {
748 				rv |= ((nat->nat_osrcaddr &
749 					e->ipfe_arg0[i * 2 + 1]) ==
750 				       e->ipfe_arg0[i * 2]) ||
751 				      ((nat->nat_nsrcaddr &
752 					e->ipfe_arg0[i * 2 + 1]) ==
753 				       e->ipfe_arg0[i * 2]) ||
754 				     ((nat->nat_odstaddr &
755 					e->ipfe_arg0[i * 2 + 1]) ==
756 				       e->ipfe_arg0[i * 2]) ||
757 				     ((nat->nat_ndstaddr &
758 					e->ipfe_arg0[i * 2 + 1]) ==
759 				       e->ipfe_arg0[i * 2]);
760 			}
761 			break;
762 
763 #ifdef USE_INET6
764 		case IPF_EXP_IP6_SRCADDR :
765 			if (nat->nat_v[0] != 6)
766 				break;
767 			for (i = 0; !rv && i < e->ipfe_narg; i++) {
768 				rv |= IP6_MASKEQ(&nat->nat_osrc6,
769 						 &e->ipfe_arg0[i * 8 + 4],
770 						 &e->ipfe_arg0[i * 8]) ||
771 				      IP6_MASKEQ(&nat->nat_nsrc6,
772 						 &e->ipfe_arg0[i * 8 + 4],
773 						 &e->ipfe_arg0[i * 8]);
774 			}
775 			break;
776 
777 		case IPF_EXP_IP6_DSTADDR :
778 			if (nat->nat_v[0] != 6)
779 				break;
780 			for (i = 0; !rv && i < e->ipfe_narg; i++) {
781 				rv |= IP6_MASKEQ(&nat->nat_odst6,
782 						 &e->ipfe_arg0[i * 8 + 4],
783 						 &e->ipfe_arg0[i * 8]) ||
784 				      IP6_MASKEQ(&nat->nat_ndst6,
785 						 &e->ipfe_arg0[i * 8 + 4],
786 						 &e->ipfe_arg0[i * 8]);
787 			}
788 			break;
789 
790 		case IPF_EXP_IP6_ADDR :
791 			if (nat->nat_v[0] != 6)
792 				break;
793 			for (i = 0; !rv && i < e->ipfe_narg; i++) {
794 				rv |= IP6_MASKEQ(&nat->nat_osrc6,
795 						 &e->ipfe_arg0[i * 8 + 4],
796 						 &e->ipfe_arg0[i * 8]) ||
797 				      IP6_MASKEQ(&nat->nat_nsrc6,
798 						 &e->ipfe_arg0[i * 8 + 4],
799 						 &e->ipfe_arg0[i * 8]) ||
800 				      IP6_MASKEQ(&nat->nat_odst6,
801 						 &e->ipfe_arg0[i * 8 + 4],
802 						 &e->ipfe_arg0[i * 8]) ||
803 				      IP6_MASKEQ(&nat->nat_ndst6,
804 						 &e->ipfe_arg0[i * 8 + 4],
805 						 &e->ipfe_arg0[i * 8]);
806 			}
807 			break;
808 #endif
809 
810 		case IPF_EXP_UDP_PORT :
811 		case IPF_EXP_TCP_PORT :
812 			for (i = 0; !rv && i < e->ipfe_narg; i++) {
813 				rv |= (nat->nat_osport == e->ipfe_arg0[i]) ||
814 				      (nat->nat_nsport == e->ipfe_arg0[i]) ||
815 				      (nat->nat_odport == e->ipfe_arg0[i]) ||
816 				      (nat->nat_ndport == e->ipfe_arg0[i]);
817 			}
818 			break;
819 
820 		case IPF_EXP_UDP_SPORT :
821 		case IPF_EXP_TCP_SPORT :
822 			for (i = 0; !rv && i < e->ipfe_narg; i++) {
823 				rv |= (nat->nat_osport == e->ipfe_arg0[i]) ||
824 				      (nat->nat_nsport == e->ipfe_arg0[i]);
825 			}
826 			break;
827 
828 		case IPF_EXP_UDP_DPORT :
829 		case IPF_EXP_TCP_DPORT :
830 			for (i = 0; !rv && i < e->ipfe_narg; i++) {
831 				rv |= (nat->nat_odport == e->ipfe_arg0[i]) ||
832 				      (nat->nat_ndport == e->ipfe_arg0[i]);
833 			}
834 			break;
835 		}
836 		rv ^= e->ipfe_not;
837 
838 		if (rv == 0)
839 			break;
840 	}
841 
842 	return rv;
843 }
844