sbin/ipfw/tables.c

   1 /*
   2  * Copyright (c) 2014 Yandex LLC
   3  * Copyright (c) 2014 Alexander V. Chernikov
   4  *
   5  * Redistribution and use in source forms, with and without modification,
   6  * are permitted provided that this entire comment appears intact.
   7  *
   8  * Redistribution in binary form may occur without any restrictions.
   9  * Obviously, it would be nice if you gave credit where credit is due
  10  * but requiring it would be too onerous.
  11  *
  12  * This software is provided ``AS IS'' without any warranties of any kind.
  13  *
  14  * in-kernel ipfw tables support.
  15  *
  16  * $FreeBSD$
  17  */
  18
  19
  20 #include <sys/types.h>
  21 #include <sys/param.h>
  22 #include <sys/socket.h>
  23 #include <sys/sysctl.h>
  24
  25 #include <ctype.h>
  26 #include <err.h>
  27 #include <errno.h>
  28 #include <netdb.h>
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <sysexits.h>
  33
  34 #include <net/if.h>
  35 #include <netinet/in.h>
  36 #include <netinet/ip_fw.h>
  37 #include <arpa/inet.h>
  38 #include <netdb.h>
  39
  40 #include "ipfw2.h"
  41
  42 static void table_modify_record(ipfw_obj_header *oh, int ac, char *av[],
  43     int add, int quiet, int update, int atomic);
  44 static int table_flush(ipfw_obj_header *oh);
  45 static int table_destroy(ipfw_obj_header *oh);
  46 static int table_do_create(ipfw_obj_header *oh, ipfw_xtable_info *i);
  47 static int table_do_modify(ipfw_obj_header *oh, ipfw_xtable_info *i);
  48 static int table_do_swap(ipfw_obj_header *oh, char *second);
  49 static void table_create(ipfw_obj_header *oh, int ac, char *av[]);
  50 static void table_modify(ipfw_obj_header *oh, int ac, char *av[]);
  51 static void table_lookup(ipfw_obj_header *oh, int ac, char *av[]);
  52 static void table_lock(ipfw_obj_header *oh, int lock);
  53 static int table_swap(ipfw_obj_header *oh, char *second);
  54 static int table_get_info(ipfw_obj_header *oh, ipfw_xtable_info *i);
  55 static int table_show_info(ipfw_xtable_info *i, void *arg);
  56
  57 static int table_destroy_one(ipfw_xtable_info *i, void *arg);
  58 static int table_flush_one(ipfw_xtable_info *i, void *arg);
  59 static int table_show_one(ipfw_xtable_info *i, void *arg);
  60 static int table_do_get_list(ipfw_xtable_info *i, ipfw_obj_header **poh);
  61 static void table_show_list(ipfw_obj_header *oh, int need_header);
  62 static void table_show_entry(ipfw_xtable_info *i, ipfw_obj_tentry *tent);
  63
  64 static void tentry_fill_key(ipfw_obj_header *oh, ipfw_obj_tentry *tent,
  65     char *key, int add, uint8_t *ptype, uint32_t *pvmask, ipfw_xtable_info *xi);
  66 static void tentry_fill_value(ipfw_obj_header *oh, ipfw_obj_tentry *tent,
  67     char *arg, uint8_t type, uint32_t vmask);
  68 static void table_show_value(char *buf, size_t bufsize, ipfw_table_value *v,
  69     uint32_t vmask, int print_ip);
  70
  71 typedef int (table_cb_t)(ipfw_xtable_info *i, void *arg);
  72 static int tables_foreach(table_cb_t *f, void *arg, int sort);
  73
  74 #ifndef s6_addr32
  75 #define s6_addr32 __u6_addr.__u6_addr32
  76 #endif
  77
  78 static struct _s_x tabletypes[] = {
  79       { "addr",         IPFW_TABLE_ADDR },
  80       { "iface",        IPFW_TABLE_INTERFACE },
  81       { "number",       IPFW_TABLE_NUMBER },
  82       { "flow",         IPFW_TABLE_FLOW },
  83       { NULL, 0 }
  84 };
  85
  86 static struct _s_x tablevaltypes[] = {
  87       { "skipto",       IPFW_VTYPE_SKIPTO },
  88       { "pipe",         IPFW_VTYPE_PIPE },
  89       { "fib",          IPFW_VTYPE_FIB },
  90       { "nat",          IPFW_VTYPE_NAT },
  91       { "dscp",         IPFW_VTYPE_DSCP },
  92       { "tag",          IPFW_VTYPE_TAG },
  93       { "divert",       IPFW_VTYPE_DIVERT },
  94       { "netgraph",     IPFW_VTYPE_NETGRAPH },
  95       { "limit",        IPFW_VTYPE_LIMIT },
  96       { "ipv4",         IPFW_VTYPE_NH4 },
  97       { "ipv6",         IPFW_VTYPE_NH6 },
  98       { NULL, 0 }
  99 };
 100
 101 static struct _s_x tablecmds[] = {
 102       { "add",          TOK_ADD },
 103       { "delete",       TOK_DEL },
 104       { "create",       TOK_CREATE },
 105       { "destroy",      TOK_DESTROY },
 106       { "flush",        TOK_FLUSH },
 107       { "modify",       TOK_MODIFY },
 108       { "swap",         TOK_SWAP },
 109       { "info",         TOK_INFO },
 110       { "detail",       TOK_DETAIL },
 111       { "list",         TOK_LIST },
 112       { "lookup",       TOK_LOOKUP },
 113       { "atomic",       TOK_ATOMIC },
 114       { "lock",         TOK_LOCK },
 115       { "unlock",       TOK_UNLOCK },
 116       { NULL, 0 }
 117 };
 118
 119 static int
 120 lookup_host (char *host, struct in_addr *ipaddr)
 121 {
 122         struct hostent *he;
 123
 124         if (!inet_aton(host, ipaddr)) {
 125                 if ((he = gethostbyname(host)) == NULL)
 126                         return(-1);
 127                 *ipaddr = *(struct in_addr *)he->h_addr_list[0];
 128         }
 129         return(0);
 130 }
 131
 132 /*
 133  * This one handles all table-related commands
 134  *      ipfw table NAME create ...
 135  *      ipfw table NAME modify ...
 136  *      ipfw table {NAME | all} destroy
 137  *      ipfw table NAME swap NAME
 138  *      ipfw table NAME lock
 139  *      ipfw table NAME unlock
 140  *      ipfw table NAME add addr[/masklen] [value]
 141  *      ipfw table NAME add [addr[/masklen] value] [addr[/masklen] value] ..
 142  *      ipfw table NAME delete addr[/masklen] [addr[/masklen]] ..
 143  *      ipfw table NAME lookup addr
 144  *      ipfw table {NAME | all} flush
 145  *      ipfw table {NAME | all} list
 146  *      ipfw table {NAME | all} info
 147  *      ipfw table {NAME | all} detail
 148  */
 149 void
 150 ipfw_table_handler(int ac, char *av[])
 151 {
 152         int do_add, is_all;
 153         int atomic, error, tcmd;
 154         ipfw_xtable_info i;
 155         ipfw_obj_header oh;
 156         char *tablename;
 157         uint8_t set;
 158         void *arg;
 159
 160         memset(&oh, 0, sizeof(oh));
 161         is_all = 0;
 162         if (co.use_set != 0)
 163                 set = co.use_set - 1;
 164         else
 165                 set = 0;
 166
 167         ac--; av++;
 168         NEED1("table needs name");
 169         tablename = *av;
 170
 171         if (table_check_name(tablename) == 0) {
 172                 table_fill_ntlv(&oh.ntlv, *av, set, 1);
 173                 oh.idx = 1;
 174         } else {
 175                 if (strcmp(tablename, "all") == 0)
 176                         is_all = 1;
 177                 else
 178                         errx(EX_USAGE, "table name %s is invalid", tablename);
 179         }
 180         ac--; av++;
 181         NEED1("table needs command");
 182
 183         tcmd = get_token(tablecmds, *av, "table command");
 184         /* Check if atomic operation was requested */
 185         atomic = 0;
 186         if (tcmd == TOK_ATOMIC) {
 187                 ac--; av++;
 188                 NEED1("atomic needs command");
 189                 tcmd = get_token(tablecmds, *av, "table command");
 190                 switch (tcmd) {
 191                 case TOK_ADD:
 192                         break;
 193                 default:
 194                         errx(EX_USAGE, "atomic is not compatible with %s", *av);
 195                 }
 196                 atomic = 1;
 197         }
 198
 199         switch (tcmd) {
 200         case TOK_LIST:
 201         case TOK_INFO:
 202         case TOK_DETAIL:
 203         case TOK_FLUSH:
 204         case TOK_DESTROY:
 205                 break;
 206         default:
 207                 if (is_all != 0)
 208                         errx(EX_USAGE, "table name required");
 209         }
 210
 211         switch (tcmd) {
 212         case TOK_ADD:
 213         case TOK_DEL:
 214                 do_add = **av == 'a';
 215                 ac--; av++;
 216                 table_modify_record(&oh, ac, av, do_add, co.do_quiet,
 217                     co.do_quiet, atomic);
 218                 break;
 219         case TOK_CREATE:
 220                 ac--; av++;
 221                 table_create(&oh, ac, av);
 222                 break;
 223         case TOK_MODIFY:
 224                 ac--; av++;
 225                 table_modify(&oh, ac, av);
 226                 break;
 227         case TOK_DESTROY:
 228                 if (is_all == 0) {
 229                         if (table_destroy(&oh) == 0)
 230                                 break;
 231                         if (errno != ESRCH)
 232                                 err(EX_OSERR, "failed to destroy table %s",
 233                                     tablename);
 234                         /* ESRCH isn't fatal, warn if not quiet mode */
 235                         if (co.do_quiet == 0)
 236                                 warn("failed to destroy table %s", tablename);
 237                 } else {
 238                         error = tables_foreach(table_destroy_one, &oh, 1);
 239                         if (error != 0)
 240                                 err(EX_OSERR,
 241                                     "failed to destroy tables list");
 242                 }
 243                 break;
 244         case TOK_FLUSH:
 245                 if (is_all == 0) {
 246                         if ((error = table_flush(&oh)) == 0)
 247                                 break;
 248                         if (errno != ESRCH)
 249                                 err(EX_OSERR, "failed to flush table %s info",
 250                                     tablename);
 251                         /* ESRCH isn't fatal, warn if not quiet mode */
 252                         if (co.do_quiet == 0)
 253                                 warn("failed to flush table %s info",
 254                                     tablename);
 255                 } else {
 256                         error = tables_foreach(table_flush_one, &oh, 1);
 257                         if (error != 0)
 258                                 err(EX_OSERR, "failed to flush tables list");
 259                         /* XXX: we ignore errors here */
 260                 }
 261                 break;
 262         case TOK_SWAP:
 263                 ac--; av++;
 264                 NEED1("second table name required");
 265                 table_swap(&oh, *av);
 266                 break;
 267         case TOK_LOCK:
 268         case TOK_UNLOCK:
 269                 table_lock(&oh, (tcmd == TOK_LOCK));
 270                 break;
 271         case TOK_DETAIL:
 272         case TOK_INFO:
 273                 arg = (tcmd == TOK_DETAIL) ? (void *)1 : NULL;
 274                 if (is_all == 0) {
 275                         if ((error = table_get_info(&oh, &i)) != 0)
 276                                 err(EX_OSERR, "failed to request table info");
 277                         table_show_info(&i, arg);
 278                 } else {
 279                         error = tables_foreach(table_show_info, arg, 1);
 280                         if (error != 0)
 281                                 err(EX_OSERR, "failed to request tables list");
 282                 }
 283                 break;
 284         case TOK_LIST:
 285                 arg = is_all ? (void*)1 : NULL;
 286                 if (is_all == 0) {
 287                         ipfw_xtable_info i;
 288                         if ((error = table_get_info(&oh, &i)) != 0)
 289                                 err(EX_OSERR, "failed to request table info");
 290                         table_show_one(&i, arg);
 291                 } else {
 292                         error = tables_foreach(table_show_one, arg, 1);
 293                         if (error != 0)
 294                                 err(EX_OSERR, "failed to request tables list");
 295                 }
 296                 break;
 297         case TOK_LOOKUP:
 298                 ac--; av++;
 299                 table_lookup(&oh, ac, av);
 300                 break;
 301         }
 302 }
 303
 304 void
 305 table_fill_ntlv(ipfw_obj_ntlv *ntlv, const char *name, uint8_t set,
 306     uint16_t uidx)
 307 {
 308
 309         ntlv->head.type = IPFW_TLV_TBL_NAME;
 310         ntlv->head.length = sizeof(ipfw_obj_ntlv);
 311         ntlv->idx = uidx;
 312         ntlv->set = set;
 313         strlcpy(ntlv->name, name, sizeof(ntlv->name));
 314 }
 315
 316 static void
 317 table_fill_objheader(ipfw_obj_header *oh, ipfw_xtable_info *i)
 318 {
 319
 320         oh->idx = 1;
 321         table_fill_ntlv(&oh->ntlv, i->tablename, i->set, 1);
 322 }
 323
 324 static struct _s_x tablenewcmds[] = {
 325       { "type",         TOK_TYPE },
 326       { "valtype",      TOK_VALTYPE },
 327       { "algo",         TOK_ALGO },
 328       { "limit",        TOK_LIMIT },
 329       { "locked",       TOK_LOCK },
 330       { "missing",      TOK_MISSING },
 331       { "or-flush",     TOK_ORFLUSH },
 332       { NULL, 0 }
 333 };
 334
 335 static struct _s_x flowtypecmds[] = {
 336       { "src-ip",       IPFW_TFFLAG_SRCIP },
 337       { "proto",        IPFW_TFFLAG_PROTO },
 338       { "src-port",     IPFW_TFFLAG_SRCPORT },
 339       { "dst-ip",       IPFW_TFFLAG_DSTIP },
 340       { "dst-port",     IPFW_TFFLAG_DSTPORT },
 341       { NULL, 0 }
 342 };
 343
 344 int
 345 table_parse_type(uint8_t ttype, char *p, uint8_t *tflags)
 346 {
 347         uint32_t fset, fclear;
 348         char *e;
 349
 350         /* Parse type options */
 351         switch(ttype) {
 352         case IPFW_TABLE_FLOW:
 353                 fset = fclear = 0;
 354                 if (fill_flags(flowtypecmds, p, &e, &fset, &fclear) != 0)
 355                         errx(EX_USAGE,
 356                             "unable to parse flow option %s", e);
 357                 *tflags = fset;
 358                 break;
 359         default:
 360                 return (EX_USAGE);
 361         }
 362
 363         return (0);
 364 }
 365
 366 void
 367 table_print_type(char *tbuf, size_t size, uint8_t type, uint8_t tflags)
 368 {
 369         const char *tname;
 370         int l;
 371
 372         if ((tname = match_value(tabletypes, type)) == NULL)
 373                 tname = "unknown";
 374
 375         l = snprintf(tbuf, size, "%s", tname);
 376         tbuf += l;
 377         size -= l;
 378
 379         switch(type) {
 380         case IPFW_TABLE_FLOW:
 381                 if (tflags != 0) {
 382                         *tbuf++ = ':';
 383                         l--;
 384                         print_flags_buffer(tbuf, size, flowtypecmds, tflags);
 385                 }
 386                 break;
 387         }
 388 }
 389
 390 /*
 391  * Creates new table
 392  *
 393  * ipfw table NAME create [ type { addr | iface | number | flow } ]
 394  *     [ algo algoname ] [missing] [or-flush]
 395  */
 396 static void
 397 table_create(ipfw_obj_header *oh, int ac, char *av[])
 398 {
 399         ipfw_xtable_info xi, xie;
 400         int error, missing, orflush, tcmd, val;
 401         uint32_t fset, fclear;
 402         char *e, *p;
 403         char tbuf[128];
 404
 405         missing = orflush = 0;
 406         memset(&xi, 0, sizeof(xi));
 407         while (ac > 0) {
 408                 tcmd = get_token(tablenewcmds, *av, "option");
 409                 ac--; av++;
 410
 411                 switch (tcmd) {
 412                 case TOK_LIMIT:
 413                         NEED1("limit value required");
 414                         xi.limit = strtol(*av, NULL, 10);
 415                         ac--; av++;
 416                         break;
 417                 case TOK_TYPE:
 418                         NEED1("table type required");
 419                         /* Type may have suboptions after ':' */
 420                         if ((p = strchr(*av, ':')) != NULL)
 421                                 *p++ = '\0';
 422                         val = match_token(tabletypes, *av);
 423                         if (val == -1) {
 424                                 concat_tokens(tbuf, sizeof(tbuf), tabletypes,
 425                                     ", ");
 426                                 errx(EX_USAGE,
 427                                     "Unknown tabletype: %s. Supported: %s",
 428                                     *av, tbuf);
 429                         }
 430                         xi.type = val;
 431                         if (p != NULL) {
 432                                 error = table_parse_type(val, p, &xi.tflags);
 433                                 if (error != 0)
 434                                         errx(EX_USAGE,
 435                                             "Unsupported suboptions: %s", p);
 436                         }
 437                         ac--; av++;
 438                         break;
 439                 case TOK_VALTYPE:
 440                         NEED1("table value type required");
 441                         fset = fclear = 0;
 442                         val = fill_flags(tablevaltypes, *av, &e, &fset, &fclear);
 443                         if (val != -1) {
 444                                 xi.vmask = fset;
 445                                 ac--; av++;
 446                                 break;
 447                         }
 448                         concat_tokens(tbuf, sizeof(tbuf), tablevaltypes, ", ");
 449                         errx(EX_USAGE, "Unknown value type: %s. Supported: %s",
 450                             e, tbuf);
 451                         break;
 452                 case TOK_ALGO:
 453                         NEED1("table algorithm name required");
 454                         if (strlen(*av) > sizeof(xi.algoname))
 455                                 errx(EX_USAGE, "algorithm name too long");
 456                         strlcpy(xi.algoname, *av, sizeof(xi.algoname));
 457                         ac--; av++;
 458                         break;
 459                 case TOK_LOCK:
 460                         xi.flags |= IPFW_TGFLAGS_LOCKED;
 461                         break;
 462                 case TOK_ORFLUSH:
 463                         orflush = 1;
 464                         /* FALLTHROUGH */
 465                 case TOK_MISSING:
 466                         missing = 1;
 467                         break;
 468                 }
 469         }
 470
 471         /* Set some defaults to preserve compatibility. */
 472         if (xi.algoname[0] == '\0' && xi.type == 0)
 473                 xi.type = IPFW_TABLE_ADDR;
 474         if (xi.vmask == 0)
 475                 xi.vmask = IPFW_VTYPE_LEGACY;
 476
 477         error = table_do_create(oh, &xi);
 478
 479         if (error == 0)
 480                 return;
 481
 482         if (errno != EEXIST || missing == 0)
 483                 err(EX_OSERR, "Table creation failed");
 484
 485         /* Check that existing table is the same we are trying to create */
 486         if (table_get_info(oh, &xie) != 0)
 487                 err(EX_OSERR, "Existing table check failed");
 488
 489         if (xi.limit != xie.limit || xi.type != xie.type ||
 490             xi.tflags != xie.tflags || xi.vmask != xie.vmask || (
 491             xi.algoname[0] != '\0' && strcmp(xi.algoname,
 492             xie.algoname) != 0) || xi.flags != xie.flags)
 493                 errx(EX_DATAERR, "The existing table is not compatible "
 494                     "with one you are creating.");
 495
 496         /* Flush existing table if instructed to do so */
 497         if (orflush != 0 && table_flush(oh) != 0)
 498                 err(EX_OSERR, "Table flush on creation failed");
 499 }
 500
 501 /*
 502  * Creates new table
 503  *
 504  * Request: [ ipfw_obj_header ipfw_xtable_info ]
 505  *
 506  * Returns 0 on success.
 507  */
 508 static int
 509 table_do_create(ipfw_obj_header *oh, ipfw_xtable_info *i)
 510 {
 511         char tbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_xtable_info)];
 512         int error;
 513
 514         memcpy(tbuf, oh, sizeof(*oh));
 515         memcpy(tbuf + sizeof(*oh), i, sizeof(*i));
 516         oh = (ipfw_obj_header *)tbuf;
 517
 518         error = do_set3(IP_FW_TABLE_XCREATE, &oh->opheader, sizeof(tbuf));
 519
 520         return (error);
 521 }
 522
 523 /*
 524  * Modifies existing table
 525  *
 526  * ipfw table NAME modify [ limit number ]
 527  */
 528 static void
 529 table_modify(ipfw_obj_header *oh, int ac, char *av[])
 530 {
 531         ipfw_xtable_info xi;
 532         int tcmd;
 533
 534         memset(&xi, 0, sizeof(xi));
 535
 536         while (ac > 0) {
 537                 tcmd = get_token(tablenewcmds, *av, "option");
 538                 ac--; av++;
 539
 540                 switch (tcmd) {
 541                 case TOK_LIMIT:
 542                         NEED1("limit value required");
 543                         xi.limit = strtol(*av, NULL, 10);
 544                         xi.mflags |= IPFW_TMFLAGS_LIMIT;
 545                         ac--; av++;
 546                         break;
 547                 default:
 548                         errx(EX_USAGE, "cmd is not supported for modification");
 549                 }
 550         }
 551
 552         if (table_do_modify(oh, &xi) != 0)
 553                 err(EX_OSERR, "Table modification failed");
 554 }
 555
 556 /*
 557  * Modifies existing table.
 558  *
 559  * Request: [ ipfw_obj_header ipfw_xtable_info ]
 560  *
 561  * Returns 0 on success.
 562  */
 563 static int
 564 table_do_modify(ipfw_obj_header *oh, ipfw_xtable_info *i)
 565 {
 566         char tbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_xtable_info)];
 567         int error;
 568
 569         memcpy(tbuf, oh, sizeof(*oh));
 570         memcpy(tbuf + sizeof(*oh), i, sizeof(*i));
 571         oh = (ipfw_obj_header *)tbuf;
 572
 573         error = do_set3(IP_FW_TABLE_XMODIFY, &oh->opheader, sizeof(tbuf));
 574
 575         return (error);
 576 }
 577
 578 /*
 579  * Locks or unlocks given table
 580  */
 581 static void
 582 table_lock(ipfw_obj_header *oh, int lock)
 583 {
 584         ipfw_xtable_info xi;
 585
 586         memset(&xi, 0, sizeof(xi));
 587
 588         xi.mflags |= IPFW_TMFLAGS_LOCK;
 589         xi.flags |= (lock != 0) ? IPFW_TGFLAGS_LOCKED : 0;
 590
 591         if (table_do_modify(oh, &xi) != 0)
 592                 err(EX_OSERR, "Table %s failed", lock != 0 ? "lock" : "unlock");
 593 }
 594
 595 /*
 596  * Destroys given table specified by @oh->ntlv.
 597  * Returns 0 on success.
 598  */
 599 static int
 600 table_destroy(ipfw_obj_header *oh)
 601 {
 602
 603         if (do_set3(IP_FW_TABLE_XDESTROY, &oh->opheader, sizeof(*oh)) != 0)
 604                 return (-1);
 605
 606         return (0);
 607 }
 608
 609 static int
 610 table_destroy_one(ipfw_xtable_info *i, void *arg)
 611 {
 612         ipfw_obj_header *oh;
 613
 614         oh = (ipfw_obj_header *)arg;
 615         table_fill_ntlv(&oh->ntlv, i->tablename, i->set, 1);
 616         if (table_destroy(oh) != 0) {
 617                 if (co.do_quiet == 0)
 618                         warn("failed to destroy table(%s) in set %u",
 619                             i->tablename, i->set);
 620                 return (-1);
 621         }
 622         return (0);
 623 }
 624
 625 /*
 626  * Flushes given table specified by @oh->ntlv.
 627  * Returns 0 on success.
 628  */
 629 static int
 630 table_flush(ipfw_obj_header *oh)
 631 {
 632
 633         if (do_set3(IP_FW_TABLE_XFLUSH, &oh->opheader, sizeof(*oh)) != 0)
 634                 return (-1);
 635
 636         return (0);
 637 }
 638
 639 static int
 640 table_do_swap(ipfw_obj_header *oh, char *second)
 641 {
 642         char tbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_obj_ntlv)];
 643         int error;
 644
 645         memset(tbuf, 0, sizeof(tbuf));
 646         memcpy(tbuf, oh, sizeof(*oh));
 647         oh = (ipfw_obj_header *)tbuf;
 648         table_fill_ntlv((ipfw_obj_ntlv *)(oh + 1), second, oh->ntlv.set, 1);
 649
 650         error = do_set3(IP_FW_TABLE_XSWAP, &oh->opheader, sizeof(tbuf));
 651
 652         return (error);
 653 }
 654
 655 /*
 656  * Swaps given table with @second one.
 657  */
 658 static int
 659 table_swap(ipfw_obj_header *oh, char *second)
 660 {
 661
 662         if (table_check_name(second) != 0)
 663                 errx(EX_USAGE, "table name %s is invalid", second);
 664
 665         if (table_do_swap(oh, second) == 0)
 666                 return (0);
 667
 668         switch (errno) {
 669         case EINVAL:
 670                 errx(EX_USAGE, "Unable to swap table: check types");
 671         case EFBIG:
 672                 errx(EX_USAGE, "Unable to swap table: check limits");
 673         }
 674
 675         return (0);
 676 }
 677
 678
 679 /*
 680  * Retrieves table in given table specified by @oh->ntlv.
 681  * it inside @i.
 682  * Returns 0 on success.
 683  */
 684 static int
 685 table_get_info(ipfw_obj_header *oh, ipfw_xtable_info *i)
 686 {
 687         char tbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_xtable_info)];
 688         size_t sz;
 689
 690         sz = sizeof(tbuf);
 691         memset(tbuf, 0, sizeof(tbuf));
 692         memcpy(tbuf, oh, sizeof(*oh));
 693         oh = (ipfw_obj_header *)tbuf;
 694
 695         if (do_get3(IP_FW_TABLE_XINFO, &oh->opheader, &sz) != 0)
 696                 return (errno);
 697
 698         if (sz < sizeof(tbuf))
 699                 return (EINVAL);
 700
 701         *i = *(ipfw_xtable_info *)(oh + 1);
 702
 703         return (0);
 704 }
 705
 706 static struct _s_x tablealgoclass[] = {
 707       { "hash",         IPFW_TACLASS_HASH },
 708       { "array",        IPFW_TACLASS_ARRAY },
 709       { "radix",        IPFW_TACLASS_RADIX },
 710       { NULL, 0 }
 711 };
 712
 713 struct ta_cldata {
 714         uint8_t         taclass;
 715         uint8_t         spare4;
 716         uint16_t        itemsize;
 717         uint16_t        itemsize6;
 718         uint32_t        size;
 719         uint32_t        count;
 720 };
 721
 722 /*
 723  * Print global/per-AF table @i algorithm info.
 724  */
 725 static void
 726 table_show_tainfo(ipfw_xtable_info *i, struct ta_cldata *d,
 727     const char *af, const char *taclass)
 728 {
 729
 730         switch (d->taclass) {
 731         case IPFW_TACLASS_HASH:
 732         case IPFW_TACLASS_ARRAY:
 733                 printf(" %salgorithm %s info\n", af, taclass);
 734                 if (d->itemsize == d->itemsize6)
 735                         printf("  size: %u items: %u itemsize: %u\n",
 736                             d->size, d->count, d->itemsize);
 737                 else
 738                         printf("  size: %u items: %u "
 739                             "itemsize4: %u itemsize6: %u\n",
 740                             d->size, d->count,
 741                             d->itemsize, d->itemsize6);
 742                 break;
 743         case IPFW_TACLASS_RADIX:
 744                 printf(" %salgorithm %s info\n", af, taclass);
 745                 if (d->itemsize == d->itemsize6)
 746                         printf("  items: %u itemsize: %u\n",
 747                             d->count, d->itemsize);
 748                 else
 749                         printf("  items: %u "
 750                             "itemsize4: %u itemsize6: %u\n",
 751                             d->count, d->itemsize, d->itemsize6);
 752                 break;
 753         default:
 754                 printf(" algo class: %s\n", taclass);
 755         }
 756 }
 757
 758 static void
 759 table_print_valheader(char *buf, size_t bufsize, uint32_t vmask)
 760 {
 761
 762         if (vmask == IPFW_VTYPE_LEGACY) {
 763                 snprintf(buf, bufsize, "legacy");
 764                 return;
 765         }
 766
 767         memset(buf, 0, bufsize);
 768         print_flags_buffer(buf, bufsize, tablevaltypes, vmask);
 769 }
 770
 771 /*
 772  * Prints table info struct @i in human-readable form.
 773  */
 774 static int
 775 table_show_info(ipfw_xtable_info *i, void *arg)
 776 {
 777         const char *vtype;
 778         ipfw_ta_tinfo *tainfo;
 779         int afdata, afitem;
 780         struct ta_cldata d;
 781         char ttype[64], tvtype[64];
 782
 783         table_print_type(ttype, sizeof(ttype), i->type, i->tflags);
 784         table_print_valheader(tvtype, sizeof(tvtype), i->vmask);
 785
 786         printf("--- table(%s), set(%u) ---\n", i->tablename, i->set);
 787         if ((i->flags & IPFW_TGFLAGS_LOCKED) != 0)
 788                 printf(" kindex: %d, type: %s, locked\n", i->kidx, ttype);
 789         else
 790                 printf(" kindex: %d, type: %s\n", i->kidx, ttype);
 791         printf(" references: %u, valtype: %s\n", i->refcnt, tvtype);
 792         printf(" algorithm: %s\n", i->algoname);
 793         printf(" items: %u, size: %u\n", i->count, i->size);
 794         if (i->limit > 0)
 795                 printf(" limit: %u\n", i->limit);
 796
 797         /* Print algo-specific info if requested & set  */
 798         if (arg == NULL)
 799                 return (0);
 800
 801         if ((i->ta_info.flags & IPFW_TATFLAGS_DATA) == 0)
 802                 return (0);
 803         tainfo = &i->ta_info;
 804
 805         afdata = 0;
 806         afitem = 0;
 807         if (tainfo->flags & IPFW_TATFLAGS_AFDATA)
 808                 afdata = 1;
 809         if (tainfo->flags & IPFW_TATFLAGS_AFITEM)
 810                 afitem = 1;
 811
 812         memset(&d, 0, sizeof(d));
 813         d.taclass = tainfo->taclass4;
 814         d.size = tainfo->size4;
 815         d.count = tainfo->count4;
 816         d.itemsize = tainfo->itemsize4;
 817         if (afdata == 0 && afitem != 0)
 818                 d.itemsize6 = tainfo->itemsize6;
 819         else
 820                 d.itemsize6 = d.itemsize;
 821         if ((vtype = match_value(tablealgoclass, d.taclass)) == NULL)
 822                 vtype = "unknown";
 823
 824         if (afdata == 0) {
 825                 table_show_tainfo(i, &d, "", vtype);
 826         } else {
 827                 table_show_tainfo(i, &d, "IPv4 ", vtype);
 828                 memset(&d, 0, sizeof(d));
 829                 d.taclass = tainfo->taclass6;
 830                 if ((vtype = match_value(tablealgoclass, d.taclass)) == NULL)
 831                         vtype = "unknown";
 832                 d.size = tainfo->size6;
 833                 d.count = tainfo->count6;
 834                 d.itemsize = tainfo->itemsize6;
 835                 d.itemsize6 = d.itemsize;
 836                 table_show_tainfo(i, &d, "IPv6 ", vtype);
 837         }
 838
 839         return (0);
 840 }
 841
 842
 843 /*
 844  * Function wrappers which can be used either
 845  * as is or as foreach function parameter.
 846  */
 847
 848 static int
 849 table_show_one(ipfw_xtable_info *i, void *arg)
 850 {
 851         ipfw_obj_header *oh;
 852         int error;
 853         int is_all;
 854
 855         is_all = arg == NULL ? 0 : 1;
 856
 857         if ((error = table_do_get_list(i, &oh)) != 0) {
 858                 err(EX_OSERR, "Error requesting table %s list", i->tablename);
 859                 return (error);
 860         }
 861
 862         table_show_list(oh, is_all);
 863
 864         free(oh);
 865         return (0);
 866 }
 867
 868 static int
 869 table_flush_one(ipfw_xtable_info *i, void *arg)
 870 {
 871         ipfw_obj_header *oh;
 872
 873         oh = (ipfw_obj_header *)arg;
 874
 875         table_fill_ntlv(&oh->ntlv, i->tablename, i->set, 1);
 876
 877         return (table_flush(oh));
 878 }
 879
 880 static int
 881 table_do_modify_record(int cmd, ipfw_obj_header *oh,
 882     ipfw_obj_tentry *tent, int count, int atomic)
 883 {
 884         ipfw_obj_ctlv *ctlv;
 885         ipfw_obj_tentry *tent_base;
 886         caddr_t pbuf;
 887         char xbuf[sizeof(*oh) + sizeof(ipfw_obj_ctlv) + sizeof(*tent)];
 888         int error, i;
 889         size_t sz;
 890
 891         sz = sizeof(*ctlv) + sizeof(*tent) * count;
 892         if (count == 1) {
 893                 memset(xbuf, 0, sizeof(xbuf));
 894                 pbuf = xbuf;
 895         } else {
 896                 if ((pbuf = calloc(1, sizeof(*oh) + sz)) == NULL)
 897                         return (ENOMEM);
 898         }
 899
 900         memcpy(pbuf, oh, sizeof(*oh));
 901         oh = (ipfw_obj_header *)pbuf;
 902         oh->opheader.version = 1;
 903
 904         ctlv = (ipfw_obj_ctlv *)(oh + 1);
 905         ctlv->count = count;
 906         ctlv->head.length = sz;
 907         if (atomic != 0)
 908                 ctlv->flags |= IPFW_CTF_ATOMIC;
 909
 910         tent_base = tent;
 911         memcpy(ctlv + 1, tent, sizeof(*tent) * count);
 912         tent = (ipfw_obj_tentry *)(ctlv + 1);
 913         for (i = 0; i < count; i++, tent++) {
 914                 tent->head.length = sizeof(ipfw_obj_tentry);
 915                 tent->idx = oh->idx;
 916         }
 917
 918         sz += sizeof(*oh);
 919         error = do_get3(cmd, &oh->opheader, &sz);
 920         if (error != 0)
 921                 error = errno;
 922         tent = (ipfw_obj_tentry *)(ctlv + 1);
 923         /* Copy result back to provided buffer */
 924         memcpy(tent_base, ctlv + 1, sizeof(*tent) * count);
 925
 926         if (pbuf != xbuf)
 927                 free(pbuf);
 928
 929         return (error);
 930 }
 931
 932 static void
 933 table_modify_record(ipfw_obj_header *oh, int ac, char *av[], int add,
 934     int quiet, int update, int atomic)
 935 {
 936         ipfw_obj_tentry *ptent, tent, *tent_buf;
 937         ipfw_xtable_info xi;
 938         uint8_t type;
 939         uint32_t vmask;
 940         int cmd, count, error, i, ignored;
 941         char *texterr, *etxt, *px;
 942
 943         if (ac == 0)
 944                 errx(EX_USAGE, "address required");
 945
 946         if (add != 0) {
 947                 cmd = IP_FW_TABLE_XADD;
 948                 texterr = "Adding record failed";
 949         } else {
 950                 cmd = IP_FW_TABLE_XDEL;
 951                 texterr = "Deleting record failed";
 952         }
 953
 954         /*
 955          * Calculate number of entries:
 956          * Assume [key val] x N for add
 957          * and
 958          * key x N for delete
 959          */
 960         count = (add != 0) ? ac / 2 + 1 : ac;
 961
 962         if (count <= 1) {
 963                 /* Adding single entry with/without value */
 964                 memset(&tent, 0, sizeof(tent));
 965                 tent_buf = &tent;
 966         } else {
 967
 968                 if ((tent_buf = calloc(count, sizeof(tent))) == NULL)
 969                         errx(EX_OSERR,
 970                             "Unable to allocate memory for all entries");
 971         }
 972         ptent = tent_buf;
 973
 974         memset(&xi, 0, sizeof(xi));
 975         count = 0;
 976         while (ac > 0) {
 977                 tentry_fill_key(oh, ptent, *av, add, &type, &vmask, &xi);
 978
 979                 /*
 980                  * Compatibility layer: auto-create table if not exists.
 981                  */
 982                 if (xi.tablename[0] == '\0') {
 983                         xi.type = type;
 984                         xi.vmask = vmask;
 985                         strlcpy(xi.tablename, oh->ntlv.name,
 986                             sizeof(xi.tablename));
 987                         if (quiet == 0)
 988                                 warnx("DEPRECATED: inserting data into "
 989                                     "non-existent table %s. (auto-created)",
 990                                     xi.tablename);
 991                         table_do_create(oh, &xi);
 992                 }
 993
 994                 oh->ntlv.type = type;
 995                 ac--; av++;
 996
 997                 if (add != 0 && ac > 0) {
 998                         tentry_fill_value(oh, ptent, *av, type, vmask);
 999                         ac--; av++;
1000                 }
1001
1002                 if (update != 0)
1003                         ptent->head.flags |= IPFW_TF_UPDATE;
1004
1005                 count++;
1006                 ptent++;
1007         }
1008
1009         error = table_do_modify_record(cmd, oh, tent_buf, count, atomic);
1010
1011         /*
1012          * Compatibility stuff: do not yell on duplicate keys or
1013          * failed deletions.
1014          */
1015         if (error == 0 || (error == EEXIST && add != 0) ||
1016             (error == ENOENT && add == 0)) {
1017                 if (quiet != 0) {
1018                         if (tent_buf != &tent)
1019                                 free(tent_buf);
1020                         return;
1021                 }
1022         }
1023
1024         /* Report results back */
1025         ptent = tent_buf;
1026         for (i = 0; i < count; ptent++, i++) {
1027                 ignored = 0;
1028                 switch (ptent->result) {
1029                 case IPFW_TR_ADDED:
1030                         px = "added";
1031                         break;
1032                 case IPFW_TR_DELETED:
1033                         px = "deleted";
1034                         break;
1035                 case IPFW_TR_UPDATED:
1036                         px = "updated";
1037                         break;
1038                 case IPFW_TR_LIMIT:
1039                         px = "limit";
1040                         ignored = 1;
1041                         break;
1042                 case IPFW_TR_ERROR:
1043                         px = "error";
1044                         ignored = 1;
1045                         break;
1046                 case IPFW_TR_NOTFOUND:
1047                         px = "notfound";
1048                         ignored = 1;
1049                         break;
1050                 case IPFW_TR_EXISTS:
1051                         px = "exists";
1052                         ignored = 1;
1053                         break;
1054                 case IPFW_TR_IGNORED:
1055                         px = "ignored";
1056                         ignored = 1;
1057                         break;
1058                 default:
1059                         px = "unknown";
1060                         ignored = 1;
1061                 }
1062
1063                 if (error != 0 && atomic != 0 && ignored == 0)
1064                         printf("%s(reverted): ", px);
1065                 else
1066                         printf("%s: ", px);
1067
1068                 table_show_entry(&xi, ptent);
1069         }
1070
1071         if (tent_buf != &tent)
1072                 free(tent_buf);
1073
1074         if (error == 0)
1075                 return;
1076         /* Get real OS error */
1077         error = errno;
1078
1079         /* Try to provide more human-readable error */
1080         switch (error) {
1081         case EEXIST:
1082                 etxt = "record already exists";
1083                 break;
1084         case EFBIG:
1085                 etxt = "limit hit";
1086                 break;
1087         case ESRCH:
1088                 etxt = "table not found";
1089                 break;
1090         case ENOENT:
1091                 etxt = "record not found";
1092                 break;
1093         case EACCES:
1094                 etxt = "table is locked";
1095                 break;
1096         default:
1097                 etxt = strerror(error);
1098         }
1099
1100         errx(EX_OSERR, "%s: %s", texterr, etxt);
1101 }
1102
1103 static int
1104 table_do_lookup(ipfw_obj_header *oh, char *key, ipfw_xtable_info *xi,
1105     ipfw_obj_tentry *xtent)
1106 {
1107         char xbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_obj_tentry)];
1108         ipfw_obj_tentry *tent;
1109         uint8_t type;
1110         uint32_t vmask;
1111         size_t sz;
1112
1113         memcpy(xbuf, oh, sizeof(*oh));
1114         oh = (ipfw_obj_header *)xbuf;
1115         tent = (ipfw_obj_tentry *)(oh + 1);
1116
1117         memset(tent, 0, sizeof(*tent));
1118         tent->head.length = sizeof(*tent);
1119         tent->idx = 1;
1120
1121         tentry_fill_key(oh, tent, key, 0, &type, &vmask, xi);
1122         oh->ntlv.type = type;
1123
1124         sz = sizeof(xbuf);
1125         if (do_get3(IP_FW_TABLE_XFIND, &oh->opheader, &sz) != 0)
1126                 return (errno);
1127
1128         if (sz < sizeof(xbuf))
1129                 return (EINVAL);
1130
1131         *xtent = *tent;
1132
1133         return (0);
1134 }
1135
1136 static void
1137 table_lookup(ipfw_obj_header *oh, int ac, char *av[])
1138 {
1139         ipfw_obj_tentry xtent;
1140         ipfw_xtable_info xi;
1141         char key[64];
1142         int error;
1143
1144         if (ac == 0)
1145                 errx(EX_USAGE, "address required");
1146
1147         strlcpy(key, *av, sizeof(key));
1148
1149         memset(&xi, 0, sizeof(xi));
1150         error = table_do_lookup(oh, key, &xi, &xtent);
1151
1152         switch (error) {
1153         case 0:
1154                 break;
1155         case ESRCH:
1156                 errx(EX_UNAVAILABLE, "Table %s not found", oh->ntlv.name);
1157         case ENOENT:
1158                 errx(EX_UNAVAILABLE, "Entry %s not found", *av);
1159         case ENOTSUP:
1160                 errx(EX_UNAVAILABLE, "Table %s algo does not support "
1161                     "\"lookup\" method", oh->ntlv.name);
1162         default:
1163                 err(EX_OSERR, "getsockopt(IP_FW_TABLE_XFIND)");
1164         }
1165
1166         table_show_entry(&xi, &xtent);
1167 }
1168
1169 static void
1170 tentry_fill_key_type(char *arg, ipfw_obj_tentry *tentry, uint8_t type,
1171     uint8_t tflags)
1172 {
1173         char *p, *pp;
1174         int mask, af;
1175         struct in6_addr *paddr, tmp;
1176         struct tflow_entry *tfe;
1177         uint32_t key, *pkey;
1178         uint16_t port;
1179         struct protoent *pent;
1180         struct servent *sent;
1181         int masklen;
1182
1183         masklen = 0;
1184         af = 0;
1185         paddr = (struct in6_addr *)&tentry->k;
1186
1187         switch (type) {
1188         case IPFW_TABLE_ADDR:
1189                 /* Remove / if exists */
1190                 if ((p = strchr(arg, '/')) != NULL) {
1191                         *p = '\0';
1192                         mask = atoi(p + 1);
1193                 }
1194
1195                 if (inet_pton(AF_INET, arg, paddr) == 1) {
1196                         if (p != NULL && mask > 32)
1197                                 errx(EX_DATAERR, "bad IPv4 mask width: %s",
1198                                     p + 1);
1199
1200                         masklen = p ? mask : 32;
1201                         af = AF_INET;
1202                 } else if (inet_pton(AF_INET6, arg, paddr) == 1) {
1203                         if (IN6_IS_ADDR_V4COMPAT(paddr))
1204                                 errx(EX_DATAERR,
1205                                     "Use IPv4 instead of v4-compatible");
1206                         if (p != NULL && mask > 128)
1207                                 errx(EX_DATAERR, "bad IPv6 mask width: %s",
1208                                     p + 1);
1209
1210                         masklen = p ? mask : 128;
1211                         af = AF_INET6;
1212                 } else {
1213                         /* Assume FQDN */
1214                         if (lookup_host(arg, (struct in_addr *)paddr) != 0)
1215                                 errx(EX_NOHOST, "hostname ``%s'' unknown", arg);
1216
1217                         masklen = 32;
1218                         type = IPFW_TABLE_ADDR;
1219                         af = AF_INET;
1220                 }
1221                 break;
1222         case IPFW_TABLE_INTERFACE:
1223                 /* Assume interface name. Copy significant data only */
1224                 mask = MIN(strlen(arg), IF_NAMESIZE - 1);
1225                 memcpy(paddr, arg, mask);
1226                 /* Set mask to exact match */
1227                 masklen = 8 * IF_NAMESIZE;
1228                 break;
1229         case IPFW_TABLE_NUMBER:
1230                 /* Port or any other key */
1231                 key = strtol(arg, &p, 10);
1232                 if (*p != '\0')
1233                         errx(EX_DATAERR, "Invalid number: %s", arg);
1234
1235                 pkey = (uint32_t *)paddr;
1236                 *pkey = key;
1237                 masklen = 32;
1238                 break;
1239         case IPFW_TABLE_FLOW:
1240                 /* Assume [src-ip][,proto][,src-port][,dst-ip][,dst-port] */
1241                 tfe = &tentry->k.flow;
1242                 af = 0;
1243
1244                 /* Handle <ipv4|ipv6> */
1245                 if ((tflags & IPFW_TFFLAG_SRCIP) != 0) {
1246                         if ((p = strchr(arg, ',')) != NULL)
1247                                 *p++ = '\0';
1248                         /* Determine family using temporary storage */
1249                         if (inet_pton(AF_INET, arg, &tmp) == 1) {
1250                                 if (af != 0 && af != AF_INET)
1251                                         errx(EX_DATAERR,
1252                                             "Inconsistent address family\n");
1253                                 af = AF_INET;
1254                                 memcpy(&tfe->a.a4.sip, &tmp, 4);
1255                         } else if (inet_pton(AF_INET6, arg, &tmp) == 1) {
1256                                 if (af != 0 && af != AF_INET6)
1257                                         errx(EX_DATAERR,
1258                                             "Inconsistent address family\n");
1259                                 af = AF_INET6;
1260                                 memcpy(&tfe->a.a6.sip6, &tmp, 16);
1261                         }
1262
1263                         arg = p;
1264                 }
1265
1266                 /* Handle <proto-num|proto-name> */
1267                 if ((tflags & IPFW_TFFLAG_PROTO) != 0) {
1268                         if (arg == NULL)
1269                                 errx(EX_DATAERR, "invalid key: proto missing");
1270                         if ((p = strchr(arg, ',')) != NULL)
1271                                 *p++ = '\0';
1272
1273                         key = strtol(arg, &pp, 10);
1274                         if (*pp != '\0') {
1275                                 if ((pent = getprotobyname(arg)) == NULL)
1276                                         errx(EX_DATAERR, "Unknown proto: %s",
1277                                             arg);
1278                                 else
1279                                         key = pent->p_proto;
1280                         }
1281
1282                         if (key > 255)
1283                                 errx(EX_DATAERR, "Bad protocol number: %u",key);
1284
1285                         tfe->proto = key;
1286
1287                         arg = p;
1288                 }
1289
1290                 /* Handle <port-num|service-name> */
1291                 if ((tflags & IPFW_TFFLAG_SRCPORT) != 0) {
1292                         if (arg == NULL)
1293                                 errx(EX_DATAERR, "invalid key: src port missing");
1294                         if ((p = strchr(arg, ',')) != NULL)
1295                                 *p++ = '\0';
1296
1297                         port = htons(strtol(arg, &pp, 10));
1298                         if (*pp != '\0') {
1299                                 if ((sent = getservbyname(arg, NULL)) == NULL)
1300                                         errx(EX_DATAERR, "Unknown service: %s",
1301                                             arg);
1302                                 port = sent->s_port;
1303                         }
1304                         tfe->sport = port;
1305                         arg = p;
1306                 }
1307
1308                 /* Handle <ipv4|ipv6>*/
1309                 if ((tflags & IPFW_TFFLAG_DSTIP) != 0) {
1310                         if (arg == NULL)
1311                                 errx(EX_DATAERR, "invalid key: dst ip missing");
1312                         if ((p = strchr(arg, ',')) != NULL)
1313                                 *p++ = '\0';
1314                         /* Determine family using temporary storage */
1315                         if (inet_pton(AF_INET, arg, &tmp) == 1) {
1316                                 if (af != 0 && af != AF_INET)
1317                                         errx(EX_DATAERR,
1318                                             "Inconsistent address family");
1319                                 af = AF_INET;
1320                                 memcpy(&tfe->a.a4.dip, &tmp, 4);
1321                         } else if (inet_pton(AF_INET6, arg, &tmp) == 1) {
1322                                 if (af != 0 && af != AF_INET6)
1323                                         errx(EX_DATAERR,
1324                                             "Inconsistent address family");
1325                                 af = AF_INET6;
1326                                 memcpy(&tfe->a.a6.dip6, &tmp, 16);
1327                         }
1328
1329                         arg = p;
1330                 }
1331
1332                 /* Handle <port-num|service-name> */
1333                 if ((tflags & IPFW_TFFLAG_DSTPORT) != 0) {
1334                         if (arg == NULL)
1335                                 errx(EX_DATAERR, "invalid key: dst port missing");
1336                         if ((p = strchr(arg, ',')) != NULL)
1337                                 *p++ = '\0';
1338
1339                         port = htons(strtol(arg, &pp, 10));
1340                         if (*pp != '\0') {
1341                                 if ((sent = getservbyname(arg, NULL)) == NULL)
1342                                         errx(EX_DATAERR, "Unknown service: %s",
1343                                             arg);
1344                                 port = sent->s_port;
1345                         }
1346                         tfe->dport = port;
1347                         arg = p;
1348                 }
1349
1350                 tfe->af = af;
1351
1352                 break;
1353
1354         default:
1355                 errx(EX_DATAERR, "Unsupported table type: %d", type);
1356         }
1357
1358         tentry->subtype = af;
1359         tentry->masklen = masklen;
1360 }
1361
1362 /*
1363  * Tries to guess table key type.
1364  * This procedure is used in legacy table auto-create
1365  * code AND in `ipfw -n` ruleset checking.
1366  *
1367  * Imported from old table_fill_xentry() parse code.
1368  */
1369 static int
1370 guess_key_type(char *key, uint8_t *ptype)
1371 {
1372         char *p;
1373         struct in6_addr addr;
1374         uint32_t kv;
1375
1376         if (ishexnumber(*key) != 0 || *key == ':') {
1377                 /* Remove / if exists */
1378                 if ((p = strchr(key, '/')) != NULL)
1379                         *p = '\0';
1380
1381                 if ((inet_pton(AF_INET, key, &addr) == 1) ||
1382                     (inet_pton(AF_INET6, key, &addr) == 1)) {
1383                         *ptype = IPFW_TABLE_CIDR;
1384                         if (p != NULL)
1385                                 *p = '/';
1386                         return (0);
1387                 } else {
1388                         /* Port or any other key */
1389                         /* Skip non-base 10 entries like 'fa1' */
1390                         kv = strtol(key, &p, 10);
1391                         if (*p == '\0') {
1392                                 *ptype = IPFW_TABLE_NUMBER;
1393                                 return (0);
1394                         } else if ((p != key) && (*p == '.')) {
1395                                 /*
1396                                  * Warn on IPv4 address strings
1397                                  * which are "valid" for inet_aton() but not
1398                                  * in inet_pton().
1399                                  *
1400                                  * Typical examples: '10.5' or '10.0.0.05'
1401                                  */
1402                                 return (1);
1403                         }
1404                 }
1405         }
1406
1407         if (strchr(key, '.') == NULL) {
1408                 *ptype = IPFW_TABLE_INTERFACE;
1409                 return (0);
1410         }
1411
1412         if (lookup_host(key, (struct in_addr *)&addr) != 0)
1413                 return (1);
1414
1415         *ptype = IPFW_TABLE_CIDR;
1416         return (0);
1417 }
1418
1419 static void
1420 tentry_fill_key(ipfw_obj_header *oh, ipfw_obj_tentry *tent, char *key,
1421     int add, uint8_t *ptype, uint32_t *pvmask, ipfw_xtable_info *xi)
1422 {
1423         uint8_t type, tflags;
1424         uint32_t vmask;
1425         int error;
1426
1427         type = 0;
1428         tflags = 0;
1429         vmask = 0;
1430
1431         if (xi->tablename[0] == '\0')
1432                 error = table_get_info(oh, xi);
1433         else
1434                 error = 0;
1435
1436         if (error == 0) {
1437                 if (co.test_only == 0) {
1438                         /* Table found */
1439                         type = xi->type;
1440                         tflags = xi->tflags;
1441                         vmask = xi->vmask;
1442                 } else {
1443                         /*
1444                          * We're running `ipfw -n`
1445                          * Compatibility layer: try to guess key type
1446                          * before failing.
1447                          */
1448                         if (guess_key_type(key, &type) != 0) {
1449                                 /* Inknown key */
1450                                 errx(EX_USAGE, "Cannot guess "
1451                                     "key '%s' type", key);
1452                         }
1453                         vmask = IPFW_VTYPE_LEGACY;
1454                 }
1455         } else {
1456                 if (error != ESRCH)
1457                         errx(EX_OSERR, "Error requesting table %s info",
1458                             oh->ntlv.name);
1459                 if (add == 0)
1460                         errx(EX_DATAERR, "Table %s does not exist",
1461                             oh->ntlv.name);
1462                 /*
1463                  * Table does not exist
1464                  * Compatibility layer: try to guess key type before failing.
1465                  */
1466                 if (guess_key_type(key, &type) != 0) {
1467                         /* Inknown key */
1468                         errx(EX_USAGE, "Table %s does not exist, cannot guess "
1469                             "key '%s' type", oh->ntlv.name, key);
1470                 }
1471
1472                 vmask = IPFW_VTYPE_LEGACY;
1473         }
1474
1475         tentry_fill_key_type(key, tent, type, tflags);
1476
1477         *ptype = type;
1478         *pvmask = vmask;
1479 }
1480
1481 static void
1482 set_legacy_value(uint32_t val, ipfw_table_value *v)
1483 {
1484         v->tag = val;
1485         v->pipe = val;
1486         v->divert = val;
1487         v->skipto = val;
1488         v->netgraph = val;
1489         v->fib = val;
1490         v->nat = val;
1491         v->nh4 = val;
1492         v->dscp = (uint8_t)val;
1493         v->limit = val;
1494 }
1495
1496 static void
1497 tentry_fill_value(ipfw_obj_header *oh, ipfw_obj_tentry *tent, char *arg,
1498     uint8_t type, uint32_t vmask)
1499 {
1500         struct addrinfo hints, *res;
1501         uint32_t a4, flag, val;
1502         ipfw_table_value *v;
1503         uint32_t i;
1504         int dval;
1505         char *comma, *e, *etype, *n, *p;
1506         struct in_addr ipaddr;
1507
1508         v = &tent->v.value;
1509
1510         /* Compat layer: keep old behavior for legacy value types */
1511         if (vmask == IPFW_VTYPE_LEGACY) {
1512                 /* Try to interpret as number first */
1513                 val = strtoul(arg, &p, 0);
1514                 if (*p == '\0') {
1515                         set_legacy_value(val, v);
1516                         return;
1517                 }
1518                 if (inet_pton(AF_INET, arg, &val) == 1) {
1519                         set_legacy_value(ntohl(val), v);
1520                         return;
1521                 }
1522                 /* Try hostname */
1523                 if (lookup_host(arg, &ipaddr) == 0) {
1524                         set_legacy_value(ntohl(ipaddr.s_addr), v);
1525                         return;
1526                 }
1527                 errx(EX_OSERR, "Unable to parse value %s", arg);
1528         }
1529
1530         /*
1531          * Shorthands: handle single value if vmask consists
1532          * of numbers only. e.g.:
1533          * vmask = "fib,skipto" -> treat input "1" as "1,1"
1534          */
1535
1536         n = arg;
1537         etype = NULL;
1538         for (i = 1; i < (1 << 31); i *= 2) {
1539                 if ((flag = (vmask & i)) == 0)
1540                         continue;
1541                 vmask &= ~flag;
1542
1543                 if ((comma = strchr(n, ',')) != NULL)
1544                         *comma = '\0';
1545
1546                 switch (flag) {
1547                 case IPFW_VTYPE_TAG:
1548                         v->tag = strtol(n, &e, 10);
1549                         if (*e != '\0')
1550                                 etype = "tag";
1551                         break;
1552                 case IPFW_VTYPE_PIPE:
1553                         v->pipe = strtol(n, &e, 10);
1554                         if (*e != '\0')
1555                                 etype = "pipe";
1556                         break;
1557                 case IPFW_VTYPE_DIVERT:
1558                         v->divert = strtol(n, &e, 10);
1559                         if (*e != '\0')
1560                                 etype = "divert";
1561                         break;
1562                 case IPFW_VTYPE_SKIPTO:
1563                         v->skipto = strtol(n, &e, 10);
1564                         if (*e != '\0')
1565                                 etype = "skipto";
1566                         break;
1567                 case IPFW_VTYPE_NETGRAPH:
1568                         v->netgraph = strtol(n, &e, 10);
1569                         if (*e != '\0')
1570                                 etype = "netgraph";
1571                         break;
1572                 case IPFW_VTYPE_FIB:
1573                         v->fib = strtol(n, &e, 10);
1574                         if (*e != '\0')
1575                                 etype = "fib";
1576                         break;
1577                 case IPFW_VTYPE_NAT:
1578                         v->nat = strtol(n, &e, 10);
1579                         if (*e != '\0')
1580                                 etype = "nat";
1581                         break;
1582                 case IPFW_VTYPE_LIMIT:
1583                         v->limit = strtol(n, &e, 10);
1584                         if (*e != '\0')
1585                                 etype = "limit";
1586                         break;
1587                 case IPFW_VTYPE_NH4:
1588                         if (strchr(n, '.') != NULL &&
1589                             inet_pton(AF_INET, n, &a4) == 1) {
1590                                 v->nh4 = ntohl(a4);
1591                                 break;
1592                         }
1593                         if (lookup_host(n, &ipaddr) == 0) {
1594                                 v->nh4 = ntohl(ipaddr.s_addr);
1595                                 break;
1596                         }
1597                         etype = "ipv4";
1598                         break;
1599                 case IPFW_VTYPE_DSCP:
1600                         if (isalpha(*n)) {
1601                                 if ((dval = match_token(f_ipdscp, n)) != -1) {
1602                                         v->dscp = dval;
1603                                         break;
1604                                 } else
1605                                         etype = "DSCP code";
1606                         } else {
1607                                 v->dscp = strtol(n, &e, 10);
1608                                 if (v->dscp > 63 || *e != '\0')
1609                                         etype = "DSCP value";
1610                         }
1611                         break;
1612                 case IPFW_VTYPE_NH6:
1613                         if (strchr(n, ':') != NULL) {
1614                                 memset(&hints, 0, sizeof(hints));
1615                                 hints.ai_family = AF_INET6;
1616                                 hints.ai_flags = AI_NUMERICHOST;
1617                                 if (getaddrinfo(n, NULL, &hints, &res) == 0) {
1618                                         v->nh6 = ((struct sockaddr_in6 *)
1619                                             res->ai_addr)->sin6_addr;
1620                                         v->zoneid = ((struct sockaddr_in6 *)
1621                                             res->ai_addr)->sin6_scope_id;
1622                                         freeaddrinfo(res);
1623                                         break;
1624                                 }
1625                         }
1626                         etype = "ipv6";
1627                         break;
1628                 }
1629
1630                 if (etype != NULL)
1631                         errx(EX_USAGE, "Unable to parse %s as %s", n, etype);
1632
1633                 if (comma != NULL)
1634                         *comma++ = ',';
1635
1636                 if ((n = comma) != NULL)
1637                         continue;
1638
1639                 /* End of input. */
1640                 if (vmask != 0)
1641                         errx(EX_USAGE, "Not enough fields inside value");
1642         }
1643 }
1644
1645 /*
1646  * Compare table names.
1647  * Honor number comparison.
1648  */
1649 static int
1650 tablename_cmp(const void *a, const void *b)
1651 {
1652         ipfw_xtable_info *ia, *ib;
1653
1654         ia = (ipfw_xtable_info *)a;
1655         ib = (ipfw_xtable_info *)b;
1656
1657         return (stringnum_cmp(ia->tablename, ib->tablename));
1658 }
1659
1660 /*
1661  * Retrieves table list from kernel,
1662  * optionally sorts it and calls requested function for each table.
1663  * Returns 0 on success.
1664  */
1665 static int
1666 tables_foreach(table_cb_t *f, void *arg, int sort)
1667 {
1668         ipfw_obj_lheader *olh;
1669         ipfw_xtable_info *info;
1670         size_t sz;
1671         int i, error;
1672
1673         /* Start with reasonable default */
1674         sz = sizeof(*olh) + 16 * sizeof(ipfw_xtable_info);
1675
1676         for (;;) {
1677                 if ((olh = calloc(1, sz)) == NULL)
1678                         return (ENOMEM);
1679
1680                 olh->size = sz;
1681                 if (do_get3(IP_FW_TABLES_XLIST, &olh->opheader, &sz) != 0) {
1682                         sz = olh->size;
1683                         free(olh);
1684                         if (errno != ENOMEM)
1685                                 return (errno);
1686                         continue;
1687                 }
1688
1689                 if (sort != 0)
1690                         qsort(olh + 1, olh->count, olh->objsize,
1691                             tablename_cmp);
1692
1693                 info = (ipfw_xtable_info *)(olh + 1);
1694                 for (i = 0; i < olh->count; i++) {
1695                         if (co.use_set == 0 || info->set == co.use_set - 1)
1696                                 error = f(info, arg);
1697                         info = (ipfw_xtable_info *)((caddr_t)info +
1698                             olh->objsize);
1699                 }
1700                 free(olh);
1701                 break;
1702         }
1703         return (0);
1704 }
1705
1706
1707 /*
1708  * Retrieves all entries for given table @i in
1709  * eXtended format. Allocate buffer large enough
1710  * to store result. Called needs to free it later.
1711  *
1712  * Returns 0 on success.
1713  */
1714 static int
1715 table_do_get_list(ipfw_xtable_info *i, ipfw_obj_header **poh)
1716 {
1717         ipfw_obj_header *oh;
1718         size_t sz;
1719         int c;
1720
1721         sz = 0;
1722         oh = NULL;
1723         for (c = 0; c < 8; c++) {
1724                 if (sz < i->size)
1725                         sz = i->size + 44;
1726                 if (oh != NULL)
1727                         free(oh);
1728                 if ((oh = calloc(1, sz)) == NULL)
1729                         continue;
1730                 table_fill_objheader(oh, i);
1731                 oh->opheader.version = 1; /* Current version */
1732                 if (do_get3(IP_FW_TABLE_XLIST, &oh->opheader, &sz) == 0) {
1733                         *poh = oh;
1734                         return (0);
1735                 }
1736
1737                 if (errno != ENOMEM)
1738                         break;
1739         }
1740         free(oh);
1741
1742         return (errno);
1743 }
1744
1745 /*
1746  * Shows all entries from @oh in human-readable format
1747  */
1748 static void
1749 table_show_list(ipfw_obj_header *oh, int need_header)
1750 {
1751         ipfw_obj_tentry *tent;
1752         uint32_t count;
1753         ipfw_xtable_info *i;
1754
1755         i = (ipfw_xtable_info *)(oh + 1);
1756         tent = (ipfw_obj_tentry *)(i + 1);
1757
1758         if (need_header)
1759                 printf("--- table(%s), set(%u) ---\n", i->tablename, i->set);
1760
1761         count = i->count;
1762         while (count > 0) {
1763                 table_show_entry(i, tent);
1764                 tent = (ipfw_obj_tentry *)((caddr_t)tent + tent->head.length);
1765                 count--;
1766         }
1767 }
1768
1769 static void
1770 table_show_value(char *buf, size_t bufsize, ipfw_table_value *v,
1771     uint32_t vmask, int print_ip)
1772 {
1773         char abuf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2];
1774         struct sockaddr_in6 sa6;
1775         uint32_t flag, i, l;
1776         size_t sz;
1777         struct in_addr a4;
1778
1779         sz = bufsize;
1780
1781         /*
1782          * Some shorthands for printing values:
1783          * legacy assumes all values are equal, so keep the first one.
1784          */
1785         if (vmask == IPFW_VTYPE_LEGACY) {
1786                 if (print_ip != 0) {
1787                         flag = htonl(v->tag);
1788                         inet_ntop(AF_INET, &flag, buf, sz);
1789                 } else
1790                         snprintf(buf, sz, "%u", v->tag);
1791                 return;
1792         }
1793
1794         for (i = 1; i < (1 << 31); i *= 2) {
1795                 if ((flag = (vmask & i)) == 0)
1796                         continue;
1797                 l = 0;
1798
1799                 switch (flag) {
1800                 case IPFW_VTYPE_TAG:
1801                         l = snprintf(buf, sz, "%u,", v->tag);
1802                         break;
1803                 case IPFW_VTYPE_PIPE:
1804                         l = snprintf(buf, sz, "%u,", v->pipe);
1805                         break;
1806                 case IPFW_VTYPE_DIVERT:
1807                         l = snprintf(buf, sz, "%d,", v->divert);
1808                         break;
1809                 case IPFW_VTYPE_SKIPTO:
1810                         l = snprintf(buf, sz, "%d,", v->skipto);
1811                         break;
1812                 case IPFW_VTYPE_NETGRAPH:
1813                         l = snprintf(buf, sz, "%u,", v->netgraph);
1814                         break;
1815                 case IPFW_VTYPE_FIB:
1816                         l = snprintf(buf, sz, "%u,", v->fib);
1817                         break;
1818                 case IPFW_VTYPE_NAT:
1819                         l = snprintf(buf, sz, "%u,", v->nat);
1820                         break;
1821                 case IPFW_VTYPE_LIMIT:
1822                         l = snprintf(buf, sz, "%u,", v->limit);
1823                         break;
1824                 case IPFW_VTYPE_NH4:
1825                         a4.s_addr = htonl(v->nh4);
1826                         inet_ntop(AF_INET, &a4, abuf, sizeof(abuf));
1827                         l = snprintf(buf, sz, "%s,", abuf);
1828                         break;
1829                 case IPFW_VTYPE_DSCP:
1830                         l = snprintf(buf, sz, "%d,", v->dscp);
1831                         break;
1832                 case IPFW_VTYPE_NH6:
1833                         sa6.sin6_family = AF_INET6;
1834                         sa6.sin6_len = sizeof(sa6);
1835                         sa6.sin6_addr = v->nh6;
1836                         sa6.sin6_port = 0;
1837                         sa6.sin6_scope_id = v->zoneid;
1838                         if (getnameinfo((const struct sockaddr *)&sa6,
1839                             sa6.sin6_len, abuf, sizeof(abuf), NULL, 0,
1840                             NI_NUMERICHOST) == 0)
1841                                 l = snprintf(buf, sz, "%s,", abuf);
1842                         break;
1843                 }
1844
1845                 buf += l;
1846                 sz -= l;
1847         }
1848
1849         if (sz != bufsize)
1850                 *(buf - 1) = '\0';
1851 }
1852
1853 static void
1854 table_show_entry(ipfw_xtable_info *i, ipfw_obj_tentry *tent)
1855 {
1856         char *comma, tbuf[128], pval[128];
1857         void *paddr;
1858         struct tflow_entry *tfe;
1859
1860         table_show_value(pval, sizeof(pval), &tent->v.value, i->vmask,
1861             co.do_value_as_ip);
1862
1863         switch (i->type) {
1864         case IPFW_TABLE_ADDR:
1865                 /* IPv4 or IPv6 prefixes */
1866                 inet_ntop(tent->subtype, &tent->k, tbuf, sizeof(tbuf));
1867                 printf("%s/%u %s\n", tbuf, tent->masklen, pval);
1868                 break;
1869         case IPFW_TABLE_INTERFACE:
1870                 /* Interface names */
1871                 printf("%s %s\n", tent->k.iface, pval);
1872                 break;
1873         case IPFW_TABLE_NUMBER:
1874                 /* numbers */
1875                 printf("%u %s\n", tent->k.key, pval);
1876                 break;
1877         case IPFW_TABLE_FLOW:
1878                 /* flows */
1879                 tfe = &tent->k.flow;
1880                 comma = "";
1881
1882                 if ((i->tflags & IPFW_TFFLAG_SRCIP) != 0) {
1883                         if (tfe->af == AF_INET)
1884                                 paddr = &tfe->a.a4.sip;
1885                         else
1886                                 paddr = &tfe->a.a6.sip6;
1887
1888                         inet_ntop(tfe->af, paddr, tbuf, sizeof(tbuf));
1889                         printf("%s%s", comma, tbuf);
1890                         comma = ",";
1891                 }
1892
1893                 if ((i->tflags & IPFW_TFFLAG_PROTO) != 0) {
1894                         printf("%s%d", comma, tfe->proto);
1895                         comma = ",";
1896                 }
1897
1898                 if ((i->tflags & IPFW_TFFLAG_SRCPORT) != 0) {
1899                         printf("%s%d", comma, ntohs(tfe->sport));
1900                         comma = ",";
1901                 }
1902                 if ((i->tflags & IPFW_TFFLAG_DSTIP) != 0) {
1903                         if (tfe->af == AF_INET)
1904                                 paddr = &tfe->a.a4.dip;
1905                         else
1906                                 paddr = &tfe->a.a6.dip6;
1907
1908                         inet_ntop(tfe->af, paddr, tbuf, sizeof(tbuf));
1909                         printf("%s%s", comma, tbuf);
1910                         comma = ",";
1911                 }
1912
1913                 if ((i->tflags & IPFW_TFFLAG_DSTPORT) != 0) {
1914                         printf("%s%d", comma, ntohs(tfe->dport));
1915                         comma = ",";
1916                 }
1917
1918                 printf(" %s\n", pval);
1919         }
1920 }
1921
1922 static int
1923 table_do_get_stdlist(uint16_t opcode, ipfw_obj_lheader **polh)
1924 {
1925         ipfw_obj_lheader req, *olh;
1926         size_t sz;
1927
1928         memset(&req, 0, sizeof(req));
1929         sz = sizeof(req);
1930
1931         if (do_get3(opcode, &req.opheader, &sz) != 0)
1932                 if (errno != ENOMEM)
1933                         return (errno);
1934
1935         sz = req.size;
1936         if ((olh = calloc(1, sz)) == NULL)
1937                 return (ENOMEM);
1938
1939         olh->size = sz;
1940         if (do_get3(opcode, &olh->opheader, &sz) != 0) {
1941                 free(olh);
1942                 return (errno);
1943         }
1944
1945         *polh = olh;
1946         return (0);
1947 }
1948
1949 static int
1950 table_do_get_algolist(ipfw_obj_lheader **polh)
1951 {
1952
1953         return (table_do_get_stdlist(IP_FW_TABLES_ALIST, polh));
1954 }
1955
1956 static int
1957 table_do_get_vlist(ipfw_obj_lheader **polh)
1958 {
1959
1960         return (table_do_get_stdlist(IP_FW_TABLE_VLIST, polh));
1961 }
1962
1963 void
1964 ipfw_list_ta(int ac, char *av[])
1965 {
1966         ipfw_obj_lheader *olh;
1967         ipfw_ta_info *info;
1968         int error, i;
1969         const char *atype;
1970
1971         error = table_do_get_algolist(&olh);
1972         if (error != 0)
1973                 err(EX_OSERR, "Unable to request algorithm list");
1974
1975         info = (ipfw_ta_info *)(olh + 1);
1976         for (i = 0; i < olh->count; i++) {
1977                 if ((atype = match_value(tabletypes, info->type)) == NULL)
1978                         atype = "unknown";
1979                 printf("--- %s ---\n", info->algoname);
1980                 printf(" type: %s\n refcount: %u\n", atype, info->refcnt);
1981
1982                 info = (ipfw_ta_info *)((caddr_t)info + olh->objsize);
1983         }
1984
1985         free(olh);
1986 }
1987
1988
1989 /* Copy of current kernel table_value structure */
1990 struct _table_value {
1991         uint32_t        tag;            /* O_TAG/O_TAGGED */
1992         uint32_t        pipe;           /* O_PIPE/O_QUEUE */
1993         uint16_t        divert;         /* O_DIVERT/O_TEE */
1994         uint16_t        skipto;         /* skipto, CALLRET */
1995         uint32_t        netgraph;       /* O_NETGRAPH/O_NGTEE */
1996         uint32_t        fib;            /* O_SETFIB */
1997         uint32_t        nat;            /* O_NAT */
1998         uint32_t        nh4;
1999         uint8_t         dscp;
2000         uint8_t         spare0;
2001         uint16_t        spare1;
2002         /* -- 32 bytes -- */
2003         struct in6_addr nh6;
2004         uint32_t        limit;          /* O_LIMIT */
2005         uint32_t        zoneid;
2006         uint64_t        refcnt;         /* Number of references */
2007 };
2008
2009 int
2010 compare_values(const void *_a, const void *_b)
2011 {
2012         struct _table_value *a, *b;
2013
2014         a = (struct _table_value *)_a;
2015         b = (struct _table_value *)_b;
2016
2017         if (a->spare1 < b->spare1)
2018                 return (-1);
2019         else if (a->spare1 > b->spare1)
2020                 return (1);
2021
2022         return (0);
2023 }
2024
2025 void
2026 ipfw_list_values(int ac, char *av[])
2027 {
2028         ipfw_obj_lheader *olh;
2029         struct _table_value *v;
2030         int error, i;
2031         uint32_t vmask;
2032         char buf[128];
2033
2034         error = table_do_get_vlist(&olh);
2035         if (error != 0)
2036                 err(EX_OSERR, "Unable to request value list");
2037
2038         vmask = 0x7FFFFFFF; /* Similar to IPFW_VTYPE_LEGACY */
2039
2040         table_print_valheader(buf, sizeof(buf), vmask);
2041         printf("HEADER: %s\n", buf);
2042         v = (struct _table_value *)(olh + 1);
2043         qsort(v, olh->count, olh->objsize, compare_values);
2044         for (i = 0; i < olh->count; i++) {
2045                 table_show_value(buf, sizeof(buf), (ipfw_table_value *)v,
2046                     vmask, 0);
2047                 printf("[%u] refs=%lu %s\n", v->spare1, (u_long)v->refcnt, buf);
2048                 v = (struct _table_value *)((caddr_t)v + olh->objsize);
2049         }
2050
2051         free(olh);
2052 }
2053
2054 int
2055 table_check_name(const char *tablename)
2056 {
2057
2058         if (ipfw_check_object_name(tablename) != 0)
2059                 return (EINVAL);
2060         /* Restrict some 'special' names */
2061         if (strcmp(tablename, "all") == 0)
2062                 return (EINVAL);
2063         return (0);
2064 }
2065