contrib/ipfilter/tools/ipnat.c

   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) && !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__) || 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 #if __FreeBSD_version >= 300000
  41 # include <net/if_var.h>
  42 #endif
  43 #include <netdb.h>
  44 #include <arpa/nameser.h>
  45 #include <arpa/inet.h>
  46 #include <resolv.h>
  47 #include <ctype.h>
  48 #if defined(linux)
  49 # include <linux/a.out.h>
  50 #else
  51 # include <nlist.h>
  52 #endif
  53 #include "ipf.h"
  54 #include "netinet/ipl.h"
  55 #include "kmem.h"
  56
  57 #ifdef  __hpux
  58 # define        nlist   nlist64
  59 #endif
  60
  61 #if     defined(sun) && !SOLARIS2
  62 # define        STRERROR(x)     sys_errlist[x]
  63 extern  char    *sys_errlist[];
  64 #else
  65 # define        STRERROR(x)     strerror(x)
  66 #endif
  67
  68 #if !defined(lint)
  69 static const char sccsid[] ="@(#)ipnat.c        1.9 6/5/96 (C) 1993 Darren Reed";
  70 static const char rcsid[] = "@(#)$Id$";
  71 #endif
  72
  73
  74 #if     SOLARIS
  75 #define bzero(a,b)      memset(a,0,b)
  76 #endif
  77 int     use_inet6 = 0;
  78 char    thishost[MAXHOSTNAMELEN];
  79
  80 extern  char    *optarg;
  81
  82 void    dostats __P((int, natstat_t *, int, int, int *));
  83 void    dotable __P((natstat_t *, int, int, int, char *));
  84 void    flushtable __P((int, int, int *));
  85 void    usage __P((char *));
  86 int     main __P((int, char*[]));
  87 void    showhostmap __P((natstat_t *nsp));
  88 void    natstat_dead __P((natstat_t *, char *));
  89 void    dostats_live __P((int, natstat_t *, int, int *));
  90 void    showhostmap_dead __P((natstat_t *));
  91 void    showhostmap_live __P((int, natstat_t *));
  92 void    dostats_dead __P((natstat_t *, int, int *));
  93 int     nat_matcharray __P((nat_t *, int *));
  94
  95 int             opts;
  96 int             nohdrfields = 0;
  97 wordtab_t       *nat_fields = NULL;
  98
  99 void usage(name)
 100         char *name;
 101 {
 102         fprintf(stderr, "Usage: %s [-CFhlnrRsv] [-f filename]\n", name);
 103         exit(1);
 104 }
 105
 106
 107 int main(argc, argv)
 108         int argc;
 109         char *argv[];
 110 {
 111         int fd, c, mode, *natfilter;
 112         char *file, *core, *kernel;
 113         natstat_t ns, *nsp;
 114         ipfobj_t obj;
 115
 116         fd = -1;
 117         opts = 0;
 118         nsp = &ns;
 119         file = NULL;
 120         core = NULL;
 121         kernel = NULL;
 122         mode = O_RDWR;
 123         natfilter = NULL;
 124
 125         assigndefined(getenv("IPNAT_PREDEFINED"));
 126
 127         while ((c = getopt(argc, argv, "CdFf:hlm:M:N:nO:prRsv")) != -1)
 128                 switch (c)
 129                 {
 130                 case 'C' :
 131                         opts |= OPT_CLEAR;
 132                         break;
 133                 case 'd' :
 134                         opts |= OPT_DEBUG;
 135                         break;
 136                 case 'f' :
 137                         file = optarg;
 138                         break;
 139                 case 'F' :
 140                         opts |= OPT_FLUSH;
 141                         break;
 142                 case 'h' :
 143                         opts |=OPT_HITS;
 144                         break;
 145                 case 'l' :
 146                         opts |= OPT_LIST;
 147                         mode = O_RDONLY;
 148                         break;
 149                 case 'm' :
 150                         natfilter = parseipfexpr(optarg, NULL);
 151                         break;
 152                 case 'M' :
 153                         core = optarg;
 154                         break;
 155                 case 'N' :
 156                         kernel = optarg;
 157                         break;
 158                 case 'n' :
 159                         opts |= OPT_DONOTHING|OPT_DONTOPEN;
 160                         mode = O_RDONLY;
 161                         break;
 162                 case 'O' :
 163                         nat_fields = parsefields(natfields, optarg);
 164                         break;
 165                 case 'p' :
 166                         opts |= OPT_PURGE;
 167                         break;
 168                 case 'R' :
 169                         opts |= OPT_NORESOLVE;
 170                         break;
 171                 case 'r' :
 172                         opts |= OPT_REMOVE;
 173                         break;
 174                 case 's' :
 175                         opts |= OPT_STAT;
 176                         mode = O_RDONLY;
 177                         break;
 178                 case 'v' :
 179                         opts |= OPT_VERBOSE;
 180                         break;
 181                 default :
 182                         usage(argv[0]);
 183                 }
 184
 185         if (((opts & OPT_PURGE) != 0) && ((opts & OPT_REMOVE) == 0)) {
 186                 (void) fprintf(stderr, "%s: -p must be used with -r\n",
 187                                argv[0]);
 188                 exit(1);
 189         }
 190
 191         initparse();
 192
 193         if ((kernel != NULL) || (core != NULL)) {
 194                 (void) setgid(getgid());
 195                 (void) setuid(getuid());
 196         }
 197
 198         if (!(opts & OPT_DONOTHING)) {
 199                 if (((fd = open(IPNAT_NAME, mode)) == -1) &&
 200                     ((fd = open(IPNAT_NAME, O_RDONLY)) == -1)) {
 201                         (void) fprintf(stderr, "%s: open: %s\n", IPNAT_NAME,
 202                                 STRERROR(errno));
 203                         exit(1);
 204                 }
 205         }
 206
 207         bzero((char *)&ns, sizeof(ns));
 208
 209         if ((opts & OPT_DONOTHING) == 0) {
 210                 if (checkrev(IPL_NAME) == -1) {
 211                         fprintf(stderr, "User/kernel version check failed\n");
 212                         exit(1);
 213                 }
 214         }
 215
 216         if (!(opts & OPT_DONOTHING) && (kernel == NULL) && (core == NULL)) {
 217                 bzero((char *)&obj, sizeof(obj));
 218                 obj.ipfo_rev = IPFILTER_VERSION;
 219                 obj.ipfo_type = IPFOBJ_NATSTAT;
 220                 obj.ipfo_size = sizeof(*nsp);
 221                 obj.ipfo_ptr = (void *)nsp;
 222                 if (ioctl(fd, SIOCGNATS, &obj) == -1) {
 223                         ipferror(fd, "ioctl(SIOCGNATS)");
 224                         exit(1);
 225                 }
 226                 (void) setgid(getgid());
 227                 (void) setuid(getuid());
 228         } else if ((kernel != NULL) || (core != NULL)) {
 229                 if (openkmem(kernel, core) == -1)
 230                         exit(1);
 231
 232                 natstat_dead(nsp, kernel);
 233                 if (opts & (OPT_LIST|OPT_STAT))
 234                         dostats(fd, nsp, opts, 0, natfilter);
 235                 exit(0);
 236         }
 237
 238         if (opts & (OPT_FLUSH|OPT_CLEAR))
 239                 flushtable(fd, opts, natfilter);
 240         if (file) {
 241                 return ipnat_parsefile(fd, ipnat_addrule, ioctl, file);
 242         }
 243         if (opts & (OPT_LIST|OPT_STAT))
 244                 dostats(fd, nsp, opts, 1, natfilter);
 245         return 0;
 246 }
 247
 248
 249 /*
 250  * Read NAT statistic information in using a symbol table and memory file
 251  * rather than doing ioctl's.
 252  */
 253 void natstat_dead(nsp, kernel)
 254         natstat_t *nsp;
 255         char *kernel;
 256 {
 257         struct nlist nat_nlist[10] = {
 258                 { "nat_table" },                /* 0 */
 259                 { "nat_list" },
 260                 { "maptable" },
 261                 { "ipf_nattable_sz" },
 262                 { "ipf_natrules_sz" },
 263                 { "ipf_rdrrules_sz" },          /* 5 */
 264                 { "ipf_hostmap_sz" },
 265                 { "nat_instances" },
 266                 { NULL }
 267         };
 268         void *tables[2];
 269
 270         if (nlist(kernel, nat_nlist) == -1) {
 271                 fprintf(stderr, "nlist error\n");
 272                 return;
 273         }
 274
 275         /*
 276          * Normally the ioctl copies all of these values into the structure
 277          * for us, before returning it to userland, so here we must copy each
 278          * one in individually.
 279          */
 280         kmemcpy((char *)&tables, nat_nlist[0].n_value, sizeof(tables));
 281         nsp->ns_side[0].ns_table = tables[0];
 282         nsp->ns_side[1].ns_table = tables[1];
 283
 284         kmemcpy((char *)&nsp->ns_list, nat_nlist[1].n_value,
 285                 sizeof(nsp->ns_list));
 286         kmemcpy((char *)&nsp->ns_maptable, nat_nlist[2].n_value,
 287                 sizeof(nsp->ns_maptable));
 288         kmemcpy((char *)&nsp->ns_nattab_sz, nat_nlist[3].n_value,
 289                 sizeof(nsp->ns_nattab_sz));
 290         kmemcpy((char *)&nsp->ns_rultab_sz, nat_nlist[4].n_value,
 291                 sizeof(nsp->ns_rultab_sz));
 292         kmemcpy((char *)&nsp->ns_rdrtab_sz, nat_nlist[5].n_value,
 293                 sizeof(nsp->ns_rdrtab_sz));
 294         kmemcpy((char *)&nsp->ns_hostmap_sz, nat_nlist[6].n_value,
 295                 sizeof(nsp->ns_hostmap_sz));
 296         kmemcpy((char *)&nsp->ns_instances, nat_nlist[7].n_value,
 297                 sizeof(nsp->ns_instances));
 298 }
 299
 300
 301 /*
 302  * Issue an ioctl to flush either the NAT rules table or the active mapping
 303  * table or both.
 304  */
 305 void flushtable(fd, opts, match)
 306         int fd, opts, *match;
 307 {
 308         int n = 0;
 309
 310         if (opts & OPT_FLUSH) {
 311                 n = 0;
 312                 if (!(opts & OPT_DONOTHING)) {
 313                         if (match != NULL) {
 314                                 ipfobj_t obj;
 315
 316                                 obj.ipfo_rev = IPFILTER_VERSION;
 317                                 obj.ipfo_size = match[0] * sizeof(int);
 318                                 obj.ipfo_type = IPFOBJ_IPFEXPR;
 319                                 obj.ipfo_ptr = match;
 320                                 if (ioctl(fd, SIOCMATCHFLUSH, &obj) == -1) {
 321                                         ipferror(fd, "ioctl(SIOCMATCHFLUSH)");
 322                                         n = -1;
 323                                 } else {
 324                                         n = obj.ipfo_retval;
 325                                 }
 326                         } else if (ioctl(fd, SIOCIPFFL, &n) == -1) {
 327                                 ipferror(fd, "ioctl(SIOCIPFFL)");
 328                                 n = -1;
 329                         }
 330                 }
 331                 if (n >= 0)
 332                         printf("%d entries flushed from NAT table\n", n);
 333         }
 334
 335         if (opts & OPT_CLEAR) {
 336                 n = 1;
 337                 if (!(opts & OPT_DONOTHING) && ioctl(fd, SIOCIPFFL, &n) == -1)
 338                         ipferror(fd, "ioctl(SIOCCNATL)");
 339                 else
 340                         printf("%d entries flushed from NAT list\n", n);
 341         }
 342 }
 343
 344
 345 /*
 346  * Display NAT statistics.
 347  */
 348 void dostats_dead(nsp, opts, filter)
 349         natstat_t *nsp;
 350         int opts, *filter;
 351 {
 352         nat_t *np, nat;
 353         ipnat_t ipn;
 354         int i;
 355
 356         if (nat_fields == NULL) {
 357                 printf("List of active MAP/Redirect filters:\n");
 358                 while (nsp->ns_list) {
 359                         if (kmemcpy((char *)&ipn, (long)nsp->ns_list,
 360                                     sizeof(ipn))) {
 361                                 perror("kmemcpy");
 362                                 break;
 363                         }
 364                         if (opts & OPT_HITS)
 365                                 printf("%lu ", ipn.in_hits);
 366                         printnat(&ipn, opts & (OPT_DEBUG|OPT_VERBOSE));
 367                         nsp->ns_list = ipn.in_next;
 368                 }
 369         }
 370
 371         if (nat_fields == NULL) {
 372                 printf("\nList of active sessions:\n");
 373
 374         } else if (nohdrfields == 0) {
 375                 for (i = 0; nat_fields[i].w_value != 0; i++) {
 376                         printfieldhdr(natfields, nat_fields + i);
 377                         if (nat_fields[i + 1].w_value != 0)
 378                                 printf("\t");
 379                 }
 380                 printf("\n");
 381         }
 382
 383         for (np = nsp->ns_instances; np; np = nat.nat_next) {
 384                 if (kmemcpy((char *)&nat, (long)np, sizeof(nat)))
 385                         break;
 386                 if ((filter != NULL) && (nat_matcharray(&nat, filter) == 0))
 387                         continue;
 388                 if (nat_fields != NULL) {
 389                         for (i = 0; nat_fields[i].w_value != 0; i++) {
 390                                 printnatfield(&nat, nat_fields[i].w_value);
 391                                 if (nat_fields[i + 1].w_value != 0)
 392                                         printf("\t");
 393                         }
 394                         printf("\n");
 395                 } else {
 396                         printactivenat(&nat, opts, nsp->ns_ticks);
 397                         if (nat.nat_aps) {
 398                                 int proto;
 399
 400                                 if (nat.nat_dir & NAT_OUTBOUND)
 401                                         proto = nat.nat_pr[1];
 402                                 else
 403                                         proto = nat.nat_pr[0];
 404                                 printaps(nat.nat_aps, opts, proto);
 405                         }
 406                 }
 407         }
 408
 409         if (opts & OPT_VERBOSE)
 410                 showhostmap_dead(nsp);
 411 }
 412
 413
 414 void dotable(nsp, fd, alive, which, side)
 415         natstat_t *nsp;
 416         int fd, alive, which;
 417         char *side;
 418 {
 419         int sz, i, used, maxlen, minlen, totallen;
 420         ipftable_t table;
 421         u_int *buckets;
 422         ipfobj_t obj;
 423
 424         sz = sizeof(*buckets) * nsp->ns_nattab_sz;
 425         buckets = (u_int *)malloc(sz);
 426         if (buckets == NULL) {
 427                 fprintf(stderr,
 428                         "cannot allocate memory (%d) for buckets\n", sz);
 429                 return;
 430         }
 431
 432         obj.ipfo_rev = IPFILTER_VERSION;
 433         obj.ipfo_type = IPFOBJ_GTABLE;
 434         obj.ipfo_size = sizeof(table);
 435         obj.ipfo_ptr = &table;
 436
 437         if (which == 0) {
 438                 table.ita_type = IPFTABLE_BUCKETS_NATIN;
 439         } else if (which == 1) {
 440                 table.ita_type = IPFTABLE_BUCKETS_NATOUT;
 441         }
 442         table.ita_table = buckets;
 443
 444         if (alive) {
 445                 if (ioctl(fd, SIOCGTABL, &obj) != 0) {
 446                         ipferror(fd, "SIOCFTABL");
 447                         free(buckets);
 448                         return;
 449                 }
 450         } else {
 451                 if (kmemcpy((char *)buckets, (u_long)nsp->ns_nattab_sz, sz)) {
 452                         free(buckets);
 453                         return;
 454                 }
 455         }
 456
 457         minlen = nsp->ns_side[which].ns_inuse;
 458         totallen = 0;
 459         maxlen = 0;
 460         used = 0;
 461
 462         for (i = 0; i < nsp->ns_nattab_sz; i++) {
 463                 if (buckets[i] > maxlen)
 464                         maxlen = buckets[i];
 465                 if (buckets[i] < minlen)
 466                         minlen = buckets[i];
 467                 if (buckets[i] != 0)
 468                         used++;
 469                 totallen += buckets[i];
 470         }
 471
 472         printf("%d%%\thash efficiency %s\n",
 473                totallen ? used * 100 / totallen : 0, side);
 474         printf("%2.2f%%\tbucket usage %s\n",
 475                ((float)used / nsp->ns_nattab_sz) * 100.0, side);
 476         printf("%d\tminimal length %s\n", minlen, side);
 477         printf("%d\tmaximal length %s\n", maxlen, side);
 478         printf("%.3f\taverage length %s\n",
 479                used ? ((float)totallen / used) : 0.0, side);
 480
 481         free(buckets);
 482 }
 483
 484
 485 void dostats(fd, nsp, opts, alive, filter)
 486         natstat_t *nsp;
 487         int fd, opts, alive, *filter;
 488 {
 489         /*
 490          * Show statistics ?
 491          */
 492         if (opts & OPT_STAT) {
 493                 printnatside("in", &nsp->ns_side[0]);
 494                 dotable(nsp, fd, alive, 0, "in");
 495
 496                 printnatside("out", &nsp->ns_side[1]);
 497                 dotable(nsp, fd, alive, 1, "out");
 498
 499                 printf("%lu\tlog successes\n", nsp->ns_side[0].ns_log);
 500                 printf("%lu\tlog failures\n", nsp->ns_side[1].ns_log);
 501                 printf("%lu\tadded in\n%lu\tadded out\n",
 502                         nsp->ns_side[0].ns_added,
 503                         nsp->ns_side[1].ns_added);
 504                 printf("%u\tactive\n", nsp->ns_active);
 505                 printf("%lu\ttransparent adds\n", nsp->ns_addtrpnt);
 506                 printf("%lu\tdivert build\n", nsp->ns_divert_build);
 507                 printf("%lu\texpired\n", nsp->ns_expire);
 508                 printf("%lu\tflush all\n", nsp->ns_flush_all);
 509                 printf("%lu\tflush closing\n", nsp->ns_flush_closing);
 510                 printf("%lu\tflush queue\n", nsp->ns_flush_queue);
 511                 printf("%lu\tflush state\n", nsp->ns_flush_state);
 512                 printf("%lu\tflush timeout\n", nsp->ns_flush_timeout);
 513                 printf("%lu\thostmap new\n", nsp->ns_hm_new);
 514                 printf("%lu\thostmap fails\n", nsp->ns_hm_newfail);
 515                 printf("%lu\thostmap add\n", nsp->ns_hm_addref);
 516                 printf("%lu\thostmap NULL rule\n", nsp->ns_hm_nullnp);
 517                 printf("%lu\tlog ok\n", nsp->ns_log_ok);
 518                 printf("%lu\tlog fail\n", nsp->ns_log_fail);
 519                 printf("%u\torphan count\n", nsp->ns_orphans);
 520                 printf("%u\trule count\n", nsp->ns_rules);
 521                 printf("%u\tmap rules\n", nsp->ns_rules_map);
 522                 printf("%u\trdr rules\n", nsp->ns_rules_rdr);
 523                 printf("%u\twilds\n", nsp->ns_wilds);
 524                 if (opts & OPT_VERBOSE)
 525                         printf("list %p\n", nsp->ns_list);
 526         }
 527
 528         if (opts & OPT_LIST) {
 529                 if (alive)
 530                         dostats_live(fd, nsp, opts, filter);
 531                 else
 532                         dostats_dead(nsp, opts, filter);
 533         }
 534 }
 535
 536
 537 /*
 538  * Display NAT statistics.
 539  */
 540 void dostats_live(fd, nsp, opts, filter)
 541         natstat_t *nsp;
 542         int fd, opts, *filter;
 543 {
 544         ipfgeniter_t iter;
 545         char buffer[2000];
 546         ipfobj_t obj;
 547         ipnat_t *ipn;
 548         nat_t nat;
 549         int i;
 550
 551         bzero((char *)&obj, sizeof(obj));
 552         obj.ipfo_rev = IPFILTER_VERSION;
 553         obj.ipfo_type = IPFOBJ_GENITER;
 554         obj.ipfo_size = sizeof(iter);
 555         obj.ipfo_ptr = &iter;
 556
 557         iter.igi_type = IPFGENITER_IPNAT;
 558         iter.igi_nitems = 1;
 559         iter.igi_data = buffer;
 560         ipn = (ipnat_t *)buffer;
 561
 562         /*
 563          * Show list of NAT rules and NAT sessions ?
 564          */
 565         if (nat_fields == NULL) {
 566                 printf("List of active MAP/Redirect filters:\n");
 567                 while (nsp->ns_list) {
 568                         if (ioctl(fd, SIOCGENITER, &obj) == -1)
 569                                 break;
 570                         if (opts & OPT_HITS)
 571                                 printf("%lu ", ipn->in_hits);
 572                         printnat(ipn, opts & (OPT_DEBUG|OPT_VERBOSE));
 573                         nsp->ns_list = ipn->in_next;
 574                 }
 575         }
 576
 577         if (nat_fields == NULL) {
 578                 printf("\nList of active sessions:\n");
 579
 580         } else if (nohdrfields == 0) {
 581                 for (i = 0; nat_fields[i].w_value != 0; i++) {
 582                         printfieldhdr(natfields, nat_fields + i);
 583                         if (nat_fields[i + 1].w_value != 0)
 584                                 printf("\t");
 585                 }
 586                 printf("\n");
 587         }
 588
 589         i = IPFGENITER_IPNAT;
 590         (void) ioctl(fd,SIOCIPFDELTOK, &i);
 591
 592
 593         iter.igi_type = IPFGENITER_NAT;
 594         iter.igi_nitems = 1;
 595         iter.igi_data = &nat;
 596
 597         while (nsp->ns_instances != NULL) {
 598                 if (ioctl(fd, SIOCGENITER, &obj) == -1)
 599                         break;
 600                 if ((filter != NULL) && (nat_matcharray(&nat, filter) == 0))
 601                         continue;
 602                 if (nat_fields != NULL) {
 603                         for (i = 0; nat_fields[i].w_value != 0; i++) {
 604                                 printnatfield(&nat, nat_fields[i].w_value);
 605                                 if (nat_fields[i + 1].w_value != 0)
 606                                         printf("\t");
 607                         }
 608                         printf("\n");
 609                 } else {
 610                         printactivenat(&nat, opts, nsp->ns_ticks);
 611                         if (nat.nat_aps) {
 612                                 int proto;
 613
 614                                 if (nat.nat_dir & NAT_OUTBOUND)
 615                                         proto = nat.nat_pr[1];
 616                                 else
 617                                         proto = nat.nat_pr[0];
 618                                 printaps(nat.nat_aps, opts, proto);
 619                         }
 620                 }
 621                 nsp->ns_instances = nat.nat_next;
 622         }
 623
 624         if (opts & OPT_VERBOSE)
 625                 showhostmap_live(fd, nsp);
 626
 627         i = IPFGENITER_NAT;
 628         (void) ioctl(fd,SIOCIPFDELTOK, &i);
 629 }
 630
 631
 632 /*
 633  * Display the active host mapping table.
 634  */
 635 void showhostmap_dead(nsp)
 636         natstat_t *nsp;
 637 {
 638         hostmap_t hm, *hmp, **maptable;
 639         u_int hv;
 640
 641         printf("\nList of active host mappings:\n");
 642
 643         maptable = (hostmap_t **)malloc(sizeof(hostmap_t *) *
 644                                         nsp->ns_hostmap_sz);
 645         if (kmemcpy((char *)maptable, (u_long)nsp->ns_maptable,
 646                     sizeof(hostmap_t *) * nsp->ns_hostmap_sz)) {
 647                 perror("kmemcpy (maptable)");
 648                 return;
 649         }
 650
 651         for (hv = 0; hv < nsp->ns_hostmap_sz; hv++) {
 652                 hmp = maptable[hv];
 653
 654                 while (hmp) {
 655                         if (kmemcpy((char *)&hm, (u_long)hmp, sizeof(hm))) {
 656                                 perror("kmemcpy (hostmap)");
 657                                 return;
 658                         }
 659
 660                         printhostmap(&hm, hv);
 661                         hmp = hm.hm_next;
 662                 }
 663         }
 664         free(maptable);
 665 }
 666
 667
 668 /*
 669  * Display the active host mapping table.
 670  */
 671 void showhostmap_live(fd, nsp)
 672         int fd;
 673         natstat_t *nsp;
 674 {
 675         ipfgeniter_t iter;
 676         hostmap_t hm;
 677         ipfobj_t obj;
 678         int i;
 679
 680         bzero((char *)&obj, sizeof(obj));
 681         obj.ipfo_rev = IPFILTER_VERSION;
 682         obj.ipfo_type = IPFOBJ_GENITER;
 683         obj.ipfo_size = sizeof(iter);
 684         obj.ipfo_ptr = &iter;
 685
 686         iter.igi_type = IPFGENITER_HOSTMAP;
 687         iter.igi_nitems = 1;
 688         iter.igi_data = &hm;
 689
 690         printf("\nList of active host mappings:\n");
 691
 692         while (nsp->ns_maplist != NULL) {
 693                 if (ioctl(fd, SIOCGENITER, &obj) == -1)
 694                         break;
 695                 printhostmap(&hm, hm.hm_hv);
 696                 nsp->ns_maplist = hm.hm_next;
 697         }
 698
 699         i = IPFGENITER_HOSTMAP;
 700         (void) ioctl(fd,SIOCIPFDELTOK, &i);
 701 }
 702
 703
 704 int nat_matcharray(nat, array)
 705         nat_t *nat;
 706         int *array;
 707 {
 708         int i, n, *x, rv, p;
 709         ipfexp_t *e;
 710
 711         rv = 0;
 712         n = array[0];
 713         x = array + 1;
 714
 715         for (; n > 0; x += 3 + x[3], rv = 0) {
 716                 e = (ipfexp_t *)x;
 717                 if (e->ipfe_cmd == IPF_EXP_END)
 718                         break;
 719                 n -= e->ipfe_size;
 720
 721                 p = e->ipfe_cmd >> 16;
 722                 if ((p != 0) && (p != nat->nat_pr[1]))
 723                         break;
 724
 725                 switch (e->ipfe_cmd)
 726                 {
 727                 case IPF_EXP_IP_PR :
 728                         for (i = 0; !rv && i < e->ipfe_narg; i++) {
 729                                 rv |= (nat->nat_pr[1] == e->ipfe_arg0[i]);
 730                         }
 731                         break;
 732
 733                 case IPF_EXP_IP_SRCADDR :
 734                         if (nat->nat_v[0] != 4)
 735                                 break;
 736                         for (i = 0; !rv && i < e->ipfe_narg; i++) {
 737                                 rv |= ((nat->nat_osrcaddr &
 738                                         e->ipfe_arg0[i * 2 + 1]) ==
 739                                        e->ipfe_arg0[i * 2]) ||
 740                                       ((nat->nat_nsrcaddr &
 741                                         e->ipfe_arg0[i * 2 + 1]) ==
 742                                        e->ipfe_arg0[i * 2]);
 743                         }
 744                         break;
 745
 746                 case IPF_EXP_IP_DSTADDR :
 747                         if (nat->nat_v[0] != 4)
 748                                 break;
 749                         for (i = 0; !rv && i < e->ipfe_narg; i++) {
 750                                 rv |= ((nat->nat_odstaddr &
 751                                         e->ipfe_arg0[i * 2 + 1]) ==
 752                                        e->ipfe_arg0[i * 2]) ||
 753                                       ((nat->nat_ndstaddr &
 754                                         e->ipfe_arg0[i * 2 + 1]) ==
 755                                        e->ipfe_arg0[i * 2]);
 756                         }
 757                         break;
 758
 759                 case IPF_EXP_IP_ADDR :
 760                         if (nat->nat_v[0] != 4)
 761                                 break;
 762                         for (i = 0; !rv && i < e->ipfe_narg; i++) {
 763                                 rv |= ((nat->nat_osrcaddr &
 764                                         e->ipfe_arg0[i * 2 + 1]) ==
 765                                        e->ipfe_arg0[i * 2]) ||
 766                                       ((nat->nat_nsrcaddr &
 767                                         e->ipfe_arg0[i * 2 + 1]) ==
 768                                        e->ipfe_arg0[i * 2]) ||
 769                                      ((nat->nat_odstaddr &
 770                                         e->ipfe_arg0[i * 2 + 1]) ==
 771                                        e->ipfe_arg0[i * 2]) ||
 772                                      ((nat->nat_ndstaddr &
 773                                         e->ipfe_arg0[i * 2 + 1]) ==
 774                                        e->ipfe_arg0[i * 2]);
 775                         }
 776                         break;
 777
 778 #ifdef USE_INET6
 779                 case IPF_EXP_IP6_SRCADDR :
 780                         if (nat->nat_v[0] != 6)
 781                                 break;
 782                         for (i = 0; !rv && i < e->ipfe_narg; i++) {
 783                                 rv |= IP6_MASKEQ(&nat->nat_osrc6,
 784                                                  &e->ipfe_arg0[i * 8 + 4],
 785                                                  &e->ipfe_arg0[i * 8]) ||
 786                                       IP6_MASKEQ(&nat->nat_nsrc6,
 787                                                  &e->ipfe_arg0[i * 8 + 4],
 788                                                  &e->ipfe_arg0[i * 8]);
 789                         }
 790                         break;
 791
 792                 case IPF_EXP_IP6_DSTADDR :
 793                         if (nat->nat_v[0] != 6)
 794                                 break;
 795                         for (i = 0; !rv && i < e->ipfe_narg; i++) {
 796                                 rv |= IP6_MASKEQ(&nat->nat_odst6,
 797                                                  &e->ipfe_arg0[i * 8 + 4],
 798                                                  &e->ipfe_arg0[i * 8]) ||
 799                                       IP6_MASKEQ(&nat->nat_ndst6,
 800                                                  &e->ipfe_arg0[i * 8 + 4],
 801                                                  &e->ipfe_arg0[i * 8]);
 802                         }
 803                         break;
 804
 805                 case IPF_EXP_IP6_ADDR :
 806                         if (nat->nat_v[0] != 6)
 807                                 break;
 808                         for (i = 0; !rv && i < e->ipfe_narg; i++) {
 809                                 rv |= IP6_MASKEQ(&nat->nat_osrc6,
 810                                                  &e->ipfe_arg0[i * 8 + 4],
 811                                                  &e->ipfe_arg0[i * 8]) ||
 812                                       IP6_MASKEQ(&nat->nat_nsrc6,
 813                                                  &e->ipfe_arg0[i * 8 + 4],
 814                                                  &e->ipfe_arg0[i * 8]) ||
 815                                       IP6_MASKEQ(&nat->nat_odst6,
 816                                                  &e->ipfe_arg0[i * 8 + 4],
 817                                                  &e->ipfe_arg0[i * 8]) ||
 818                                       IP6_MASKEQ(&nat->nat_ndst6,
 819                                                  &e->ipfe_arg0[i * 8 + 4],
 820                                                  &e->ipfe_arg0[i * 8]);
 821                         }
 822                         break;
 823 #endif
 824
 825                 case IPF_EXP_UDP_PORT :
 826                 case IPF_EXP_TCP_PORT :
 827                         for (i = 0; !rv && i < e->ipfe_narg; i++) {
 828                                 rv |= (nat->nat_osport == e->ipfe_arg0[i]) ||
 829                                       (nat->nat_nsport == e->ipfe_arg0[i]) ||
 830                                       (nat->nat_odport == e->ipfe_arg0[i]) ||
 831                                       (nat->nat_ndport == e->ipfe_arg0[i]);
 832                         }
 833                         break;
 834
 835                 case IPF_EXP_UDP_SPORT :
 836                 case IPF_EXP_TCP_SPORT :
 837                         for (i = 0; !rv && i < e->ipfe_narg; i++) {
 838                                 rv |= (nat->nat_osport == e->ipfe_arg0[i]) ||
 839                                       (nat->nat_nsport == e->ipfe_arg0[i]);
 840                         }
 841                         break;
 842
 843                 case IPF_EXP_UDP_DPORT :
 844                 case IPF_EXP_TCP_DPORT :
 845                         for (i = 0; !rv && i < e->ipfe_narg; i++) {
 846                                 rv |= (nat->nat_odport == e->ipfe_arg0[i]) ||
 847                                       (nat->nat_ndport == e->ipfe_arg0[i]);
 848                         }
 849                         break;
 850                 }
 851                 rv ^= e->ipfe_not;
 852
 853                 if (rv == 0)
 854                         break;
 855         }
 856
 857         return rv;
 858 }