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 #include <netdb.h>
  41 #include <arpa/nameser.h>
  42 #include <arpa/inet.h>
  43 #include <resolv.h>
  44 #include <ctype.h>
  45 #if defined(linux)
  46 # include <linux/a.out.h>
  47 #else
  48 # include <nlist.h>
  49 #endif
  50 #include "ipf.h"
  51 #include "netinet/ipl.h"
  52 #include "kmem.h"
  53
  54 #ifdef  __hpux
  55 # define        nlist   nlist64
  56 #endif
  57
  58 #if     defined(sun) && !SOLARIS2
  59 # define        STRERROR(x)     sys_errlist[x]
  60 extern  char    *sys_errlist[];
  61 #else
  62 # define        STRERROR(x)     strerror(x)
  63 #endif
  64
  65 #if !defined(lint)
  66 static const char sccsid[] ="@(#)ipnat.c        1.9 6/5/96 (C) 1993 Darren Reed";
  67 static const char rcsid[] = "@(#)$Id$";
  68 #endif
  69
  70
  71 #if     SOLARIS
  72 #define bzero(a,b)      memset(a,0,b)
  73 #endif
  74 int     use_inet6 = 0;
  75 char    thishost[MAXHOSTNAMELEN];
  76
  77 extern  char    *optarg;
  78
  79 void    dostats __P((int, natstat_t *, int, int, int *));
  80 void    dotable __P((natstat_t *, int, int, int, char *));
  81 void    flushtable __P((int, int, int *));
  82 void    usage __P((char *));
  83 int     main __P((int, char*[]));
  84 void    showhostmap __P((natstat_t *nsp));
  85 void    natstat_dead __P((natstat_t *, char *));
  86 void    dostats_live __P((int, natstat_t *, int, int *));
  87 void    showhostmap_dead __P((natstat_t *));
  88 void    showhostmap_live __P((int, natstat_t *));
  89 void    dostats_dead __P((natstat_t *, int, int *));
  90 int     nat_matcharray __P((nat_t *, int *));
  91
  92 int             opts;
  93 int             nohdrfields = 0;
  94 wordtab_t       *nat_fields = NULL;
  95
  96 void usage(name)
  97         char *name;
  98 {
  99         fprintf(stderr, "Usage: %s [-CFhlnrRsv] [-f filename]\n", name);
 100         exit(1);
 101 }
 102
 103
 104 int main(argc, argv)
 105         int argc;
 106         char *argv[];
 107 {
 108         int fd, c, mode, *natfilter;
 109         char *file, *core, *kernel;
 110         natstat_t ns, *nsp;
 111         ipfobj_t obj;
 112
 113         fd = -1;
 114         opts = 0;
 115         nsp = &ns;
 116         file = NULL;
 117         core = NULL;
 118         kernel = NULL;
 119         mode = O_RDWR;
 120         natfilter = NULL;
 121
 122         assigndefined(getenv("IPNAT_PREDEFINED"));
 123
 124         while ((c = getopt(argc, argv, "CdFf:hlm:M:N:nO:prRsv")) != -1)
 125                 switch (c)
 126                 {
 127                 case 'C' :
 128                         opts |= OPT_CLEAR;
 129                         break;
 130                 case 'd' :
 131                         opts |= OPT_DEBUG;
 132                         break;
 133                 case 'f' :
 134                         file = optarg;
 135                         break;
 136                 case 'F' :
 137                         opts |= OPT_FLUSH;
 138                         break;
 139                 case 'h' :
 140                         opts |=OPT_HITS;
 141                         break;
 142                 case 'l' :
 143                         opts |= OPT_LIST;
 144                         mode = O_RDONLY;
 145                         break;
 146                 case 'm' :
 147                         natfilter = parseipfexpr(optarg, NULL);
 148                         break;
 149                 case 'M' :
 150                         core = optarg;
 151                         break;
 152                 case 'N' :
 153                         kernel = optarg;
 154                         break;
 155                 case 'n' :
 156                         opts |= OPT_DONOTHING|OPT_DONTOPEN;
 157                         mode = O_RDONLY;
 158                         break;
 159                 case 'O' :
 160                         nat_fields = parsefields(natfields, optarg);
 161                         break;
 162                 case 'p' :
 163                         opts |= OPT_PURGE;
 164                         break;
 165                 case 'R' :
 166                         opts |= OPT_NORESOLVE;
 167                         break;
 168                 case 'r' :
 169                         opts |= OPT_REMOVE;
 170                         break;
 171                 case 's' :
 172                         opts |= OPT_STAT;
 173                         mode = O_RDONLY;
 174                         break;
 175                 case 'v' :
 176                         opts |= OPT_VERBOSE;
 177                         break;
 178                 default :
 179                         usage(argv[0]);
 180                 }
 181
 182         if (((opts & OPT_PURGE) != 0) && ((opts & OPT_REMOVE) == 0)) {
 183                 (void) fprintf(stderr, "%s: -p must be used with -r\n",
 184                                argv[0]);
 185                 exit(1);
 186         }
 187
 188         initparse();
 189
 190         if ((kernel != NULL) || (core != NULL)) {
 191                 (void) setgid(getgid());
 192                 (void) setuid(getuid());
 193         }
 194
 195         if (!(opts & OPT_DONOTHING)) {
 196                 if (((fd = open(IPNAT_NAME, mode)) == -1) &&
 197                     ((fd = open(IPNAT_NAME, O_RDONLY)) == -1)) {
 198                         (void) fprintf(stderr, "%s: open: %s\n", IPNAT_NAME,
 199                                 STRERROR(errno));
 200                         exit(1);
 201                 }
 202         }
 203
 204         bzero((char *)&ns, sizeof(ns));
 205
 206         if ((opts & OPT_DONOTHING) == 0) {
 207                 if (checkrev(IPL_NAME) == -1) {
 208                         fprintf(stderr, "User/kernel version check failed\n");
 209                         exit(1);
 210                 }
 211         }
 212
 213         if (!(opts & OPT_DONOTHING) && (kernel == NULL) && (core == NULL)) {
 214                 bzero((char *)&obj, sizeof(obj));
 215                 obj.ipfo_rev = IPFILTER_VERSION;
 216                 obj.ipfo_type = IPFOBJ_NATSTAT;
 217                 obj.ipfo_size = sizeof(*nsp);
 218                 obj.ipfo_ptr = (void *)nsp;
 219                 if (ioctl(fd, SIOCGNATS, &obj) == -1) {
 220                         ipferror(fd, "ioctl(SIOCGNATS)");
 221                         exit(1);
 222                 }
 223                 (void) setgid(getgid());
 224                 (void) setuid(getuid());
 225         } else if ((kernel != NULL) || (core != NULL)) {
 226                 if (openkmem(kernel, core) == -1)
 227                         exit(1);
 228
 229                 natstat_dead(nsp, kernel);
 230                 if (opts & (OPT_LIST|OPT_STAT))
 231                         dostats(fd, nsp, opts, 0, natfilter);
 232                 exit(0);
 233         }
 234
 235         if (opts & (OPT_FLUSH|OPT_CLEAR))
 236                 flushtable(fd, opts, natfilter);
 237         if (file) {
 238                 return ipnat_parsefile(fd, ipnat_addrule, ioctl, file);
 239         }
 240         if (opts & (OPT_LIST|OPT_STAT))
 241                 dostats(fd, nsp, opts, 1, natfilter);
 242         return 0;
 243 }
 244
 245
 246 /*
 247  * Read NAT statistic information in using a symbol table and memory file
 248  * rather than doing ioctl's.
 249  */
 250 void natstat_dead(nsp, kernel)
 251         natstat_t *nsp;
 252         char *kernel;
 253 {
 254         struct nlist nat_nlist[10] = {
 255                 { "nat_table" },                /* 0 */
 256                 { "nat_list" },
 257                 { "maptable" },
 258                 { "ipf_nattable_sz" },
 259                 { "ipf_natrules_sz" },
 260                 { "ipf_rdrrules_sz" },          /* 5 */
 261                 { "ipf_hostmap_sz" },
 262                 { "nat_instances" },
 263                 { NULL }
 264         };
 265         void *tables[2];
 266
 267         if (nlist(kernel, nat_nlist) == -1) {
 268                 fprintf(stderr, "nlist error\n");
 269                 return;
 270         }
 271
 272         /*
 273          * Normally the ioctl copies all of these values into the structure
 274          * for us, before returning it to userland, so here we must copy each
 275          * one in individually.
 276          */
 277         kmemcpy((char *)&tables, nat_nlist[0].n_value, sizeof(tables));
 278         nsp->ns_side[0].ns_table = tables[0];
 279         nsp->ns_side[1].ns_table = tables[1];
 280
 281         kmemcpy((char *)&nsp->ns_list, nat_nlist[1].n_value,
 282                 sizeof(nsp->ns_list));
 283         kmemcpy((char *)&nsp->ns_maptable, nat_nlist[2].n_value,
 284                 sizeof(nsp->ns_maptable));
 285         kmemcpy((char *)&nsp->ns_nattab_sz, nat_nlist[3].n_value,
 286                 sizeof(nsp->ns_nattab_sz));
 287         kmemcpy((char *)&nsp->ns_rultab_sz, nat_nlist[4].n_value,
 288                 sizeof(nsp->ns_rultab_sz));
 289         kmemcpy((char *)&nsp->ns_rdrtab_sz, nat_nlist[5].n_value,
 290                 sizeof(nsp->ns_rdrtab_sz));
 291         kmemcpy((char *)&nsp->ns_hostmap_sz, nat_nlist[6].n_value,
 292                 sizeof(nsp->ns_hostmap_sz));
 293         kmemcpy((char *)&nsp->ns_instances, nat_nlist[7].n_value,
 294                 sizeof(nsp->ns_instances));
 295 }
 296
 297
 298 /*
 299  * Issue an ioctl to flush either the NAT rules table or the active mapping
 300  * table or both.
 301  */
 302 void flushtable(fd, opts, match)
 303         int fd, opts, *match;
 304 {
 305         int n = 0;
 306
 307         if (opts & OPT_FLUSH) {
 308                 n = 0;
 309                 if (!(opts & OPT_DONOTHING)) {
 310                         if (match != NULL) {
 311                                 ipfobj_t obj;
 312
 313                                 obj.ipfo_rev = IPFILTER_VERSION;
 314                                 obj.ipfo_size = match[0] * sizeof(int);
 315                                 obj.ipfo_type = IPFOBJ_IPFEXPR;
 316                                 obj.ipfo_ptr = match;
 317                                 if (ioctl(fd, SIOCMATCHFLUSH, &obj) == -1) {
 318                                         ipferror(fd, "ioctl(SIOCMATCHFLUSH)");
 319                                         n = -1;
 320                                 } else {
 321                                         n = obj.ipfo_retval;
 322                                 }
 323                         } else if (ioctl(fd, SIOCIPFFL, &n) == -1) {
 324                                 ipferror(fd, "ioctl(SIOCIPFFL)");
 325                                 n = -1;
 326                         }
 327                 }
 328                 if (n >= 0)
 329                         printf("%d entries flushed from NAT table\n", n);
 330         }
 331
 332         if (opts & OPT_CLEAR) {
 333                 n = 1;
 334                 if (!(opts & OPT_DONOTHING) && ioctl(fd, SIOCIPFFL, &n) == -1)
 335                         ipferror(fd, "ioctl(SIOCCNATL)");
 336                 else
 337                         printf("%d entries flushed from NAT list\n", n);
 338         }
 339 }
 340
 341
 342 /*
 343  * Display NAT statistics.
 344  */
 345 void dostats_dead(nsp, opts, filter)
 346         natstat_t *nsp;
 347         int opts, *filter;
 348 {
 349         nat_t *np, nat;
 350         ipnat_t ipn;
 351         int i;
 352
 353         if (nat_fields == NULL) {
 354                 printf("List of active MAP/Redirect filters:\n");
 355                 while (nsp->ns_list) {
 356                         if (kmemcpy((char *)&ipn, (long)nsp->ns_list,
 357                                     sizeof(ipn))) {
 358                                 perror("kmemcpy");
 359                                 break;
 360                         }
 361                         if (opts & OPT_HITS)
 362                                 printf("%lu ", ipn.in_hits);
 363                         printnat(&ipn, opts & (OPT_DEBUG|OPT_VERBOSE));
 364                         nsp->ns_list = ipn.in_next;
 365                 }
 366         }
 367
 368         if (nat_fields == NULL) {
 369                 printf("\nList of active sessions:\n");
 370
 371         } else if (nohdrfields == 0) {
 372                 for (i = 0; nat_fields[i].w_value != 0; i++) {
 373                         printfieldhdr(natfields, nat_fields + i);
 374                         if (nat_fields[i + 1].w_value != 0)
 375                                 printf("\t");
 376                 }
 377                 printf("\n");
 378         }
 379
 380         for (np = nsp->ns_instances; np; np = nat.nat_next) {
 381                 if (kmemcpy((char *)&nat, (long)np, sizeof(nat)))
 382                         break;
 383                 if ((filter != NULL) && (nat_matcharray(&nat, filter) == 0))
 384                         continue;
 385                 if (nat_fields != NULL) {
 386                         for (i = 0; nat_fields[i].w_value != 0; i++) {
 387                                 printnatfield(&nat, nat_fields[i].w_value);
 388                                 if (nat_fields[i + 1].w_value != 0)
 389                                         printf("\t");
 390                         }
 391                         printf("\n");
 392                 } else {
 393                         printactivenat(&nat, opts, nsp->ns_ticks);
 394                         if (nat.nat_aps) {
 395                                 int proto;
 396
 397                                 if (nat.nat_dir & NAT_OUTBOUND)
 398                                         proto = nat.nat_pr[1];
 399                                 else
 400                                         proto = nat.nat_pr[0];
 401                                 printaps(nat.nat_aps, opts, proto);
 402                         }
 403                 }
 404         }
 405
 406         if (opts & OPT_VERBOSE)
 407                 showhostmap_dead(nsp);
 408 }
 409
 410
 411 void dotable(nsp, fd, alive, which, side)
 412         natstat_t *nsp;
 413         int fd, alive, which;
 414         char *side;
 415 {
 416         int sz, i, used, maxlen, minlen, totallen;
 417         ipftable_t table;
 418         u_int *buckets;
 419         ipfobj_t obj;
 420
 421         sz = sizeof(*buckets) * nsp->ns_nattab_sz;
 422         buckets = (u_int *)malloc(sz);
 423         if (buckets == NULL) {
 424                 fprintf(stderr,
 425                         "cannot allocate memory (%d) for buckets\n", sz);
 426                 return;
 427         }
 428
 429         obj.ipfo_rev = IPFILTER_VERSION;
 430         obj.ipfo_type = IPFOBJ_GTABLE;
 431         obj.ipfo_size = sizeof(table);
 432         obj.ipfo_ptr = &table;
 433
 434         if (which == 0) {
 435                 table.ita_type = IPFTABLE_BUCKETS_NATIN;
 436         } else if (which == 1) {
 437                 table.ita_type = IPFTABLE_BUCKETS_NATOUT;
 438         }
 439         table.ita_table = buckets;
 440
 441         if (alive) {
 442                 if (ioctl(fd, SIOCGTABL, &obj) != 0) {
 443                         ipferror(fd, "SIOCFTABL");
 444                         free(buckets);
 445                         return;
 446                 }
 447         } else {
 448                 if (kmemcpy((char *)buckets, (u_long)nsp->ns_nattab_sz, sz)) {
 449                         free(buckets);
 450                         return;
 451                 }
 452         }
 453
 454         minlen = nsp->ns_side[which].ns_inuse;
 455         totallen = 0;
 456         maxlen = 0;
 457         used = 0;
 458
 459         for (i = 0; i < nsp->ns_nattab_sz; i++) {
 460                 if (buckets[i] > maxlen)
 461                         maxlen = buckets[i];
 462                 if (buckets[i] < minlen)
 463                         minlen = buckets[i];
 464                 if (buckets[i] != 0)
 465                         used++;
 466                 totallen += buckets[i];
 467         }
 468
 469         printf("%d%%\thash efficiency %s\n",
 470                totallen ? used * 100 / totallen : 0, side);
 471         printf("%2.2f%%\tbucket usage %s\n",
 472                ((float)used / nsp->ns_nattab_sz) * 100.0, side);
 473         printf("%d\tminimal length %s\n", minlen, side);
 474         printf("%d\tmaximal length %s\n", maxlen, side);
 475         printf("%.3f\taverage length %s\n",
 476                used ? ((float)totallen / used) : 0.0, side);
 477
 478         free(buckets);
 479 }
 480
 481
 482 void dostats(fd, nsp, opts, alive, filter)
 483         natstat_t *nsp;
 484         int fd, opts, alive, *filter;
 485 {
 486         /*
 487          * Show statistics ?
 488          */
 489         if (opts & OPT_STAT) {
 490                 printnatside("in", &nsp->ns_side[0]);
 491                 dotable(nsp, fd, alive, 0, "in");
 492
 493                 printnatside("out", &nsp->ns_side[1]);
 494                 dotable(nsp, fd, alive, 1, "out");
 495
 496                 printf("%lu\tlog successes\n", nsp->ns_side[0].ns_log);
 497                 printf("%lu\tlog failures\n", nsp->ns_side[1].ns_log);
 498                 printf("%lu\tadded in\n%lu\tadded out\n",
 499                         nsp->ns_side[0].ns_added,
 500                         nsp->ns_side[1].ns_added);
 501                 printf("%u\tactive\n", nsp->ns_active);
 502                 printf("%lu\ttransparent adds\n", nsp->ns_addtrpnt);
 503                 printf("%lu\tdivert build\n", nsp->ns_divert_build);
 504                 printf("%lu\texpired\n", nsp->ns_expire);
 505                 printf("%lu\tflush all\n", nsp->ns_flush_all);
 506                 printf("%lu\tflush closing\n", nsp->ns_flush_closing);
 507                 printf("%lu\tflush queue\n", nsp->ns_flush_queue);
 508                 printf("%lu\tflush state\n", nsp->ns_flush_state);
 509                 printf("%lu\tflush timeout\n", nsp->ns_flush_timeout);
 510                 printf("%lu\thostmap new\n", nsp->ns_hm_new);
 511                 printf("%lu\thostmap fails\n", nsp->ns_hm_newfail);
 512                 printf("%lu\thostmap add\n", nsp->ns_hm_addref);
 513                 printf("%lu\thostmap NULL rule\n", nsp->ns_hm_nullnp);
 514                 printf("%lu\tlog ok\n", nsp->ns_log_ok);
 515                 printf("%lu\tlog fail\n", nsp->ns_log_fail);
 516                 printf("%u\torphan count\n", nsp->ns_orphans);
 517                 printf("%u\trule count\n", nsp->ns_rules);
 518                 printf("%u\tmap rules\n", nsp->ns_rules_map);
 519                 printf("%u\trdr rules\n", nsp->ns_rules_rdr);
 520                 printf("%u\twilds\n", nsp->ns_wilds);
 521                 if (opts & OPT_VERBOSE)
 522                         printf("list %p\n", nsp->ns_list);
 523         }
 524
 525         if (opts & OPT_LIST) {
 526                 if (alive)
 527                         dostats_live(fd, nsp, opts, filter);
 528                 else
 529                         dostats_dead(nsp, opts, filter);
 530         }
 531 }
 532
 533
 534 /*
 535  * Display NAT statistics.
 536  */
 537 void dostats_live(fd, nsp, opts, filter)
 538         natstat_t *nsp;
 539         int fd, opts, *filter;
 540 {
 541         ipfgeniter_t iter;
 542         char buffer[2000];
 543         ipfobj_t obj;
 544         ipnat_t *ipn;
 545         nat_t nat;
 546         int i;
 547
 548         bzero((char *)&obj, sizeof(obj));
 549         obj.ipfo_rev = IPFILTER_VERSION;
 550         obj.ipfo_type = IPFOBJ_GENITER;
 551         obj.ipfo_size = sizeof(iter);
 552         obj.ipfo_ptr = &iter;
 553
 554         iter.igi_type = IPFGENITER_IPNAT;
 555         iter.igi_nitems = 1;
 556         iter.igi_data = buffer;
 557         ipn = (ipnat_t *)buffer;
 558
 559         /*
 560          * Show list of NAT rules and NAT sessions ?
 561          */
 562         if (nat_fields == NULL) {
 563                 printf("List of active MAP/Redirect filters:\n");
 564                 while (nsp->ns_list) {
 565                         if (ioctl(fd, SIOCGENITER, &obj) == -1)
 566                                 break;
 567                         if (opts & OPT_HITS)
 568                                 printf("%lu ", ipn->in_hits);
 569                         printnat(ipn, opts & (OPT_DEBUG|OPT_VERBOSE));
 570                         nsp->ns_list = ipn->in_next;
 571                 }
 572         }
 573
 574         if (nat_fields == NULL) {
 575                 printf("\nList of active sessions:\n");
 576
 577         } else if (nohdrfields == 0) {
 578                 for (i = 0; nat_fields[i].w_value != 0; i++) {
 579                         printfieldhdr(natfields, nat_fields + i);
 580                         if (nat_fields[i + 1].w_value != 0)
 581                                 printf("\t");
 582                 }
 583                 printf("\n");
 584         }
 585
 586         i = IPFGENITER_IPNAT;
 587         (void) ioctl(fd,SIOCIPFDELTOK, &i);
 588
 589
 590         iter.igi_type = IPFGENITER_NAT;
 591         iter.igi_nitems = 1;
 592         iter.igi_data = &nat;
 593
 594         while (nsp->ns_instances != NULL) {
 595                 if (ioctl(fd, SIOCGENITER, &obj) == -1)
 596                         break;
 597                 if ((filter != NULL) && (nat_matcharray(&nat, filter) == 0))
 598                         continue;
 599                 if (nat_fields != NULL) {
 600                         for (i = 0; nat_fields[i].w_value != 0; i++) {
 601                                 printnatfield(&nat, nat_fields[i].w_value);
 602                                 if (nat_fields[i + 1].w_value != 0)
 603                                         printf("\t");
 604                         }
 605                         printf("\n");
 606                 } else {
 607                         printactivenat(&nat, opts, nsp->ns_ticks);
 608                         if (nat.nat_aps) {
 609                                 int proto;
 610
 611                                 if (nat.nat_dir & NAT_OUTBOUND)
 612                                         proto = nat.nat_pr[1];
 613                                 else
 614                                         proto = nat.nat_pr[0];
 615                                 printaps(nat.nat_aps, opts, proto);
 616                         }
 617                 }
 618                 nsp->ns_instances = nat.nat_next;
 619         }
 620
 621         if (opts & OPT_VERBOSE)
 622                 showhostmap_live(fd, nsp);
 623
 624         i = IPFGENITER_NAT;
 625         (void) ioctl(fd,SIOCIPFDELTOK, &i);
 626 }
 627
 628
 629 /*
 630  * Display the active host mapping table.
 631  */
 632 void showhostmap_dead(nsp)
 633         natstat_t *nsp;
 634 {
 635         hostmap_t hm, *hmp, **maptable;
 636         u_int hv;
 637
 638         printf("\nList of active host mappings:\n");
 639
 640         maptable = (hostmap_t **)malloc(sizeof(hostmap_t *) *
 641                                         nsp->ns_hostmap_sz);
 642         if (kmemcpy((char *)maptable, (u_long)nsp->ns_maptable,
 643                     sizeof(hostmap_t *) * nsp->ns_hostmap_sz)) {
 644                 perror("kmemcpy (maptable)");
 645                 return;
 646         }
 647
 648         for (hv = 0; hv < nsp->ns_hostmap_sz; hv++) {
 649                 hmp = maptable[hv];
 650
 651                 while (hmp) {
 652                         if (kmemcpy((char *)&hm, (u_long)hmp, sizeof(hm))) {
 653                                 perror("kmemcpy (hostmap)");
 654                                 return;
 655                         }
 656
 657                         printhostmap(&hm, hv);
 658                         hmp = hm.hm_next;
 659                 }
 660         }
 661         free(maptable);
 662 }
 663
 664
 665 /*
 666  * Display the active host mapping table.
 667  */
 668 void showhostmap_live(fd, nsp)
 669         int fd;
 670         natstat_t *nsp;
 671 {
 672         ipfgeniter_t iter;
 673         hostmap_t hm;
 674         ipfobj_t obj;
 675         int i;
 676
 677         bzero((char *)&obj, sizeof(obj));
 678         obj.ipfo_rev = IPFILTER_VERSION;
 679         obj.ipfo_type = IPFOBJ_GENITER;
 680         obj.ipfo_size = sizeof(iter);
 681         obj.ipfo_ptr = &iter;
 682
 683         iter.igi_type = IPFGENITER_HOSTMAP;
 684         iter.igi_nitems = 1;
 685         iter.igi_data = &hm;
 686
 687         printf("\nList of active host mappings:\n");
 688
 689         while (nsp->ns_maplist != NULL) {
 690                 if (ioctl(fd, SIOCGENITER, &obj) == -1)
 691                         break;
 692                 printhostmap(&hm, hm.hm_hv);
 693                 nsp->ns_maplist = hm.hm_next;
 694         }
 695
 696         i = IPFGENITER_HOSTMAP;
 697         (void) ioctl(fd,SIOCIPFDELTOK, &i);
 698 }
 699
 700
 701 int nat_matcharray(nat, array)
 702         nat_t *nat;
 703         int *array;
 704 {
 705         int i, n, *x, rv, p;
 706         ipfexp_t *e;
 707
 708         rv = 0;
 709         n = array[0];
 710         x = array + 1;
 711
 712         for (; n > 0; x += 3 + x[3], rv = 0) {
 713                 e = (ipfexp_t *)x;
 714                 if (e->ipfe_cmd == IPF_EXP_END)
 715                         break;
 716                 n -= e->ipfe_size;
 717
 718                 p = e->ipfe_cmd >> 16;
 719                 if ((p != 0) && (p != nat->nat_pr[1]))
 720                         break;
 721
 722                 switch (e->ipfe_cmd)
 723                 {
 724                 case IPF_EXP_IP_PR :
 725                         for (i = 0; !rv && i < e->ipfe_narg; i++) {
 726                                 rv |= (nat->nat_pr[1] == e->ipfe_arg0[i]);
 727                         }
 728                         break;
 729
 730                 case IPF_EXP_IP_SRCADDR :
 731                         if (nat->nat_v[0] != 4)
 732                                 break;
 733                         for (i = 0; !rv && i < e->ipfe_narg; i++) {
 734                                 rv |= ((nat->nat_osrcaddr &
 735                                         e->ipfe_arg0[i * 2 + 1]) ==
 736                                        e->ipfe_arg0[i * 2]) ||
 737                                       ((nat->nat_nsrcaddr &
 738                                         e->ipfe_arg0[i * 2 + 1]) ==
 739                                        e->ipfe_arg0[i * 2]);
 740                         }
 741                         break;
 742
 743                 case IPF_EXP_IP_DSTADDR :
 744                         if (nat->nat_v[0] != 4)
 745                                 break;
 746                         for (i = 0; !rv && i < e->ipfe_narg; i++) {
 747                                 rv |= ((nat->nat_odstaddr &
 748                                         e->ipfe_arg0[i * 2 + 1]) ==
 749                                        e->ipfe_arg0[i * 2]) ||
 750                                       ((nat->nat_ndstaddr &
 751                                         e->ipfe_arg0[i * 2 + 1]) ==
 752                                        e->ipfe_arg0[i * 2]);
 753                         }
 754                         break;
 755
 756                 case IPF_EXP_IP_ADDR :
 757                         if (nat->nat_v[0] != 4)
 758                                 break;
 759                         for (i = 0; !rv && i < e->ipfe_narg; i++) {
 760                                 rv |= ((nat->nat_osrcaddr &
 761                                         e->ipfe_arg0[i * 2 + 1]) ==
 762                                        e->ipfe_arg0[i * 2]) ||
 763                                       ((nat->nat_nsrcaddr &
 764                                         e->ipfe_arg0[i * 2 + 1]) ==
 765                                        e->ipfe_arg0[i * 2]) ||
 766                                      ((nat->nat_odstaddr &
 767                                         e->ipfe_arg0[i * 2 + 1]) ==
 768                                        e->ipfe_arg0[i * 2]) ||
 769                                      ((nat->nat_ndstaddr &
 770                                         e->ipfe_arg0[i * 2 + 1]) ==
 771                                        e->ipfe_arg0[i * 2]);
 772                         }
 773                         break;
 774
 775 #ifdef USE_INET6
 776                 case IPF_EXP_IP6_SRCADDR :
 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_osrc6,
 781                                                  &e->ipfe_arg0[i * 8 + 4],
 782                                                  &e->ipfe_arg0[i * 8]) ||
 783                                       IP6_MASKEQ(&nat->nat_nsrc6,
 784                                                  &e->ipfe_arg0[i * 8 + 4],
 785                                                  &e->ipfe_arg0[i * 8]);
 786                         }
 787                         break;
 788
 789                 case IPF_EXP_IP6_DSTADDR :
 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_odst6,
 794                                                  &e->ipfe_arg0[i * 8 + 4],
 795                                                  &e->ipfe_arg0[i * 8]) ||
 796                                       IP6_MASKEQ(&nat->nat_ndst6,
 797                                                  &e->ipfe_arg0[i * 8 + 4],
 798                                                  &e->ipfe_arg0[i * 8]);
 799                         }
 800                         break;
 801
 802                 case IPF_EXP_IP6_ADDR :
 803                         if (nat->nat_v[0] != 6)
 804                                 break;
 805                         for (i = 0; !rv && i < e->ipfe_narg; i++) {
 806                                 rv |= IP6_MASKEQ(&nat->nat_osrc6,
 807                                                  &e->ipfe_arg0[i * 8 + 4],
 808                                                  &e->ipfe_arg0[i * 8]) ||
 809                                       IP6_MASKEQ(&nat->nat_nsrc6,
 810                                                  &e->ipfe_arg0[i * 8 + 4],
 811                                                  &e->ipfe_arg0[i * 8]) ||
 812                                       IP6_MASKEQ(&nat->nat_odst6,
 813                                                  &e->ipfe_arg0[i * 8 + 4],
 814                                                  &e->ipfe_arg0[i * 8]) ||
 815                                       IP6_MASKEQ(&nat->nat_ndst6,
 816                                                  &e->ipfe_arg0[i * 8 + 4],
 817                                                  &e->ipfe_arg0[i * 8]);
 818                         }
 819                         break;
 820 #endif
 821
 822                 case IPF_EXP_UDP_PORT :
 823                 case IPF_EXP_TCP_PORT :
 824                         for (i = 0; !rv && i < e->ipfe_narg; i++) {
 825                                 rv |= (nat->nat_osport == e->ipfe_arg0[i]) ||
 826                                       (nat->nat_nsport == e->ipfe_arg0[i]) ||
 827                                       (nat->nat_odport == e->ipfe_arg0[i]) ||
 828                                       (nat->nat_ndport == e->ipfe_arg0[i]);
 829                         }
 830                         break;
 831
 832                 case IPF_EXP_UDP_SPORT :
 833                 case IPF_EXP_TCP_SPORT :
 834                         for (i = 0; !rv && i < e->ipfe_narg; i++) {
 835                                 rv |= (nat->nat_osport == e->ipfe_arg0[i]) ||
 836                                       (nat->nat_nsport == e->ipfe_arg0[i]);
 837                         }
 838                         break;
 839
 840                 case IPF_EXP_UDP_DPORT :
 841                 case IPF_EXP_TCP_DPORT :
 842                         for (i = 0; !rv && i < e->ipfe_narg; i++) {
 843                                 rv |= (nat->nat_odport == e->ipfe_arg0[i]) ||
 844                                       (nat->nat_ndport == e->ipfe_arg0[i]);
 845                         }
 846                         break;
 847                 }
 848                 rv ^= e->ipfe_not;
 849
 850                 if (rv == 0)
 851                         break;
 852         }
 853
 854         return rv;
 855 }