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
usage(name)84 void usage(name)
85 char *name;
86 {
87 fprintf(stderr, "Usage: %s [-CFhlnrRsv] [-f filename]\n", name);
88 exit(1);
89 }
90
91
main(argc,argv)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 */
natstat_dead(nsp,kernel)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 */
flushtable(fd,opts,match)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 */
dostats_dead(nsp,opts,filter)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
dotable(nsp,fd,alive,which,side)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
dostats(fd,nsp,opts,alive,filter)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 */
dostats_live(fd,nsp,opts,filter)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 */
showhostmap_dead(nsp)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 */
showhostmap_live(fd,nsp)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
nat_matcharray(nat,array)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