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