iptables.c revision cd2f9bdbb7f9b737e5d640aafeb78bcd8e3a7adf
1/* Code to take an iptables-style command line and do it. */ 2 3/* 4 * Author: Paul.Russell@rustcorp.com.au and mneuling@radlogic.com.au 5 * 6 * (C) 2000-2002 by the netfilter coreteam <coreteam@netfilter.org>: 7 * Paul 'Rusty' Russell <rusty@rustcorp.com.au> 8 * Marc Boucher <marc+nf@mbsi.ca> 9 * James Morris <jmorris@intercode.com.au> 10 * Harald Welte <laforge@gnumonks.org> 11 * Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> 12 * 13 * This program is free software; you can redistribute it and/or modify 14 * it under the terms of the GNU General Public License as published by 15 * the Free Software Foundation; either version 2 of the License, or 16 * (at your option) any later version. 17 * 18 * This program is distributed in the hope that it will be useful, 19 * but WITHOUT ANY WARRANTY; without even the implied warranty of 20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 * GNU General Public License for more details. 22 * 23 * You should have received a copy of the GNU General Public License 24 * along with this program; if not, write to the Free Software 25 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 26 */ 27 28#include <getopt.h> 29#include <string.h> 30#include <netdb.h> 31#include <errno.h> 32#include <stdbool.h> 33#include <stdio.h> 34#include <stdlib.h> 35#include <ctype.h> 36#include <stdarg.h> 37#include <limits.h> 38#include <unistd.h> 39#include <iptables.h> 40#include <xtables.h> 41#include <fcntl.h> 42#include "xshared.h" 43 44#ifndef TRUE 45#define TRUE 1 46#endif 47#ifndef FALSE 48#define FALSE 0 49#endif 50 51#define FMT_NUMERIC 0x0001 52#define FMT_NOCOUNTS 0x0002 53#define FMT_KILOMEGAGIGA 0x0004 54#define FMT_OPTIONS 0x0008 55#define FMT_NOTABLE 0x0010 56#define FMT_NOTARGET 0x0020 57#define FMT_VIA 0x0040 58#define FMT_NONEWLINE 0x0080 59#define FMT_LINENUMBERS 0x0100 60 61#define FMT_PRINT_RULE (FMT_NOCOUNTS | FMT_OPTIONS | FMT_VIA \ 62 | FMT_NUMERIC | FMT_NOTABLE) 63#define FMT(tab,notab) ((format) & FMT_NOTABLE ? (notab) : (tab)) 64 65 66#define CMD_NONE 0x0000U 67#define CMD_INSERT 0x0001U 68#define CMD_DELETE 0x0002U 69#define CMD_DELETE_NUM 0x0004U 70#define CMD_REPLACE 0x0008U 71#define CMD_APPEND 0x0010U 72#define CMD_LIST 0x0020U 73#define CMD_FLUSH 0x0040U 74#define CMD_ZERO 0x0080U 75#define CMD_NEW_CHAIN 0x0100U 76#define CMD_DELETE_CHAIN 0x0200U 77#define CMD_SET_POLICY 0x0400U 78#define CMD_RENAME_CHAIN 0x0800U 79#define CMD_LIST_RULES 0x1000U 80#define CMD_ZERO_NUM 0x2000U 81#define CMD_CHECK 0x4000U 82#define NUMBER_OF_CMD 16 83static const char cmdflags[] = { 'I', 'D', 'D', 'R', 'A', 'L', 'F', 'Z', 84 'Z', 'N', 'X', 'P', 'E', 'S', 'C' }; 85 86#define OPT_FRAGMENT 0x00800U 87#define NUMBER_OF_OPT ARRAY_SIZE(optflags) 88static const char optflags[] 89= { 'n', 's', 'd', 'p', 'j', 'v', 'x', 'i', 'o', '0', 'c', 'f'}; 90 91static struct option original_opts[] = { 92 {.name = "append", .has_arg = 1, .val = 'A'}, 93 {.name = "delete", .has_arg = 1, .val = 'D'}, 94 {.name = "check", .has_arg = 1, .val = 'C'}, 95 {.name = "insert", .has_arg = 1, .val = 'I'}, 96 {.name = "replace", .has_arg = 1, .val = 'R'}, 97 {.name = "list", .has_arg = 2, .val = 'L'}, 98 {.name = "list-rules", .has_arg = 2, .val = 'S'}, 99 {.name = "flush", .has_arg = 2, .val = 'F'}, 100 {.name = "zero", .has_arg = 2, .val = 'Z'}, 101 {.name = "new-chain", .has_arg = 1, .val = 'N'}, 102 {.name = "delete-chain", .has_arg = 2, .val = 'X'}, 103 {.name = "rename-chain", .has_arg = 1, .val = 'E'}, 104 {.name = "policy", .has_arg = 1, .val = 'P'}, 105 {.name = "source", .has_arg = 1, .val = 's'}, 106 {.name = "destination", .has_arg = 1, .val = 'd'}, 107 {.name = "src", .has_arg = 1, .val = 's'}, /* synonym */ 108 {.name = "dst", .has_arg = 1, .val = 'd'}, /* synonym */ 109 {.name = "protocol", .has_arg = 1, .val = 'p'}, 110 {.name = "in-interface", .has_arg = 1, .val = 'i'}, 111 {.name = "jump", .has_arg = 1, .val = 'j'}, 112 {.name = "table", .has_arg = 1, .val = 't'}, 113 {.name = "match", .has_arg = 1, .val = 'm'}, 114 {.name = "numeric", .has_arg = 0, .val = 'n'}, 115 {.name = "out-interface", .has_arg = 1, .val = 'o'}, 116 {.name = "verbose", .has_arg = 0, .val = 'v'}, 117 {.name = "exact", .has_arg = 0, .val = 'x'}, 118 {.name = "fragments", .has_arg = 0, .val = 'f'}, 119 {.name = "version", .has_arg = 0, .val = 'V'}, 120 {.name = "help", .has_arg = 2, .val = 'h'}, 121 {.name = "line-numbers", .has_arg = 0, .val = '0'}, 122 {.name = "modprobe", .has_arg = 1, .val = 'M'}, 123 {.name = "set-counters", .has_arg = 1, .val = 'c'}, 124 {.name = "goto", .has_arg = 1, .val = 'g'}, 125 {.name = "ipv4", .has_arg = 0, .val = '4'}, 126 {.name = "ipv6", .has_arg = 0, .val = '6'}, 127 {NULL}, 128}; 129 130void iptables_exit_error(enum xtables_exittype status, const char *msg, ...) __attribute__((noreturn, format(printf,2,3))); 131 132struct xtables_globals iptables_globals = { 133 .option_offset = 0, 134 .program_version = IPTABLES_VERSION, 135 .orig_opts = original_opts, 136 .exit_err = iptables_exit_error, 137}; 138 139/* Table of legal combinations of commands and options. If any of the 140 * given commands make an option legal, that option is legal (applies to 141 * CMD_LIST and CMD_ZERO only). 142 * Key: 143 * + compulsory 144 * x illegal 145 * optional 146 */ 147 148static const char commands_v_options[NUMBER_OF_CMD][NUMBER_OF_OPT] = 149/* Well, it's better than "Re: Linux vs FreeBSD" */ 150{ 151 /* -n -s -d -p -j -v -x -i -o --line -c -f */ 152/*INSERT*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x',' ',' '}, 153/*DELETE*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x','x',' '}, 154/*DELETE_NUM*/{'x','x','x','x','x',' ','x','x','x','x','x','x'}, 155/*REPLACE*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x',' ',' '}, 156/*APPEND*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x',' ',' '}, 157/*LIST*/ {' ','x','x','x','x',' ',' ','x','x',' ','x','x'}, 158/*FLUSH*/ {'x','x','x','x','x',' ','x','x','x','x','x','x'}, 159/*ZERO*/ {'x','x','x','x','x',' ','x','x','x','x','x','x'}, 160/*ZERO_NUM*/ {'x','x','x','x','x',' ','x','x','x','x','x','x'}, 161/*NEW_CHAIN*/ {'x','x','x','x','x',' ','x','x','x','x','x','x'}, 162/*DEL_CHAIN*/ {'x','x','x','x','x',' ','x','x','x','x','x','x'}, 163/*SET_POLICY*/{'x','x','x','x','x',' ','x','x','x','x',' ','x'}, 164/*RENAME*/ {'x','x','x','x','x',' ','x','x','x','x','x','x'}, 165/*LIST_RULES*/{'x','x','x','x','x',' ','x','x','x','x','x','x'}, 166/*CHECK*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x','x',' '}, 167}; 168 169static const int inverse_for_options[NUMBER_OF_OPT] = 170{ 171/* -n */ 0, 172/* -s */ IPT_INV_SRCIP, 173/* -d */ IPT_INV_DSTIP, 174/* -p */ XT_INV_PROTO, 175/* -j */ 0, 176/* -v */ 0, 177/* -x */ 0, 178/* -i */ IPT_INV_VIA_IN, 179/* -o */ IPT_INV_VIA_OUT, 180/*--line*/ 0, 181/* -c */ 0, 182/* -f */ IPT_INV_FRAG, 183}; 184 185#define opts iptables_globals.opts 186#define prog_name iptables_globals.program_name 187#define prog_vers iptables_globals.program_version 188 189/* Primitive headers... */ 190/* defined in netinet/in.h */ 191#if 0 192#ifndef IPPROTO_ESP 193#define IPPROTO_ESP 50 194#endif 195#ifndef IPPROTO_AH 196#define IPPROTO_AH 51 197#endif 198#endif 199 200enum { 201 IPT_DOTTED_ADDR = 0, 202 IPT_DOTTED_MASK 203}; 204 205static void __attribute__((noreturn)) 206exit_tryhelp(int status) 207{ 208 if (line != -1) 209 fprintf(stderr, "Error occurred at line: %d\n", line); 210 fprintf(stderr, "Try `%s -h' or '%s --help' for more information.\n", 211 prog_name, prog_name); 212 xtables_free_opts(1); 213 exit(status); 214} 215 216static void 217exit_printhelp(const struct xtables_rule_match *matches) 218{ 219 printf("%s v%s\n\n" 220"Usage: %s -[ACD] chain rule-specification [options]\n" 221" %s -I chain [rulenum] rule-specification [options]\n" 222" %s -R chain rulenum rule-specification [options]\n" 223" %s -D chain rulenum [options]\n" 224" %s -[LS] [chain [rulenum]] [options]\n" 225" %s -[FZ] [chain] [options]\n" 226" %s -[NX] chain\n" 227" %s -E old-chain-name new-chain-name\n" 228" %s -P chain target [options]\n" 229" %s -h (print this help information)\n\n", 230 prog_name, prog_vers, prog_name, prog_name, 231 prog_name, prog_name, prog_name, prog_name, 232 prog_name, prog_name, prog_name, prog_name); 233 234 printf( 235"Commands:\n" 236"Either long or short options are allowed.\n" 237" --append -A chain Append to chain\n" 238" --check -C chain Check for the existence of a rule\n" 239" --delete -D chain Delete matching rule from chain\n" 240" --delete -D chain rulenum\n" 241" Delete rule rulenum (1 = first) from chain\n" 242" --insert -I chain [rulenum]\n" 243" Insert in chain as rulenum (default 1=first)\n" 244" --replace -R chain rulenum\n" 245" Replace rule rulenum (1 = first) in chain\n" 246" --list -L [chain [rulenum]]\n" 247" List the rules in a chain or all chains\n" 248" --list-rules -S [chain [rulenum]]\n" 249" Print the rules in a chain or all chains\n" 250" --flush -F [chain] Delete all rules in chain or all chains\n" 251" --zero -Z [chain [rulenum]]\n" 252" Zero counters in chain or all chains\n" 253" --new -N chain Create a new user-defined chain\n" 254" --delete-chain\n" 255" -X [chain] Delete a user-defined chain\n" 256" --policy -P chain target\n" 257" Change policy on chain to target\n" 258" --rename-chain\n" 259" -E old-chain new-chain\n" 260" Change chain name, (moving any references)\n" 261 262"Options:\n" 263" --ipv4 -4 Nothing (line is ignored by ip6tables-restore)\n" 264" --ipv6 -6 Error (line is ignored by iptables-restore)\n" 265"[!] --proto -p proto protocol: by number or name, eg. `tcp'\n" 266"[!] --source -s address[/mask][...]\n" 267" source specification\n" 268"[!] --destination -d address[/mask][...]\n" 269" destination specification\n" 270"[!] --in-interface -i input name[+]\n" 271" network interface name ([+] for wildcard)\n" 272" --jump -j target\n" 273" target for rule (may load target extension)\n" 274#ifdef IPT_F_GOTO 275" --goto -g chain\n" 276" jump to chain with no return\n" 277#endif 278" --match -m match\n" 279" extended match (may load extension)\n" 280" --numeric -n numeric output of addresses and ports\n" 281"[!] --out-interface -o output name[+]\n" 282" network interface name ([+] for wildcard)\n" 283" --table -t table table to manipulate (default: `filter')\n" 284" --verbose -v verbose mode\n" 285" --line-numbers print line numbers when listing\n" 286" --exact -x expand numbers (display exact values)\n" 287"[!] --fragment -f match second or further fragments only\n" 288" --modprobe=<command> try to insert modules using this command\n" 289" --set-counters PKTS BYTES set the counter during insert/append\n" 290"[!] --version -V print package version.\n"); 291 292 print_extension_helps(xtables_targets, matches); 293 exit(0); 294} 295 296void 297iptables_exit_error(enum xtables_exittype status, const char *msg, ...) 298{ 299 va_list args; 300 301 va_start(args, msg); 302 fprintf(stderr, "%s v%s: ", prog_name, prog_vers); 303 vfprintf(stderr, msg, args); 304 va_end(args); 305 fprintf(stderr, "\n"); 306 if (status == PARAMETER_PROBLEM) 307 exit_tryhelp(status); 308 if (status == VERSION_PROBLEM) 309 fprintf(stderr, 310 "Perhaps iptables or your kernel needs to be upgraded.\n"); 311 /* On error paths, make sure that we don't leak memory */ 312 xtables_free_opts(1); 313 exit(status); 314} 315 316static void 317generic_opt_check(int command, int options) 318{ 319 int i, j, legal = 0; 320 321 /* Check that commands are valid with options. Complicated by the 322 * fact that if an option is legal with *any* command given, it is 323 * legal overall (ie. -z and -l). 324 */ 325 for (i = 0; i < NUMBER_OF_OPT; i++) { 326 legal = 0; /* -1 => illegal, 1 => legal, 0 => undecided. */ 327 328 for (j = 0; j < NUMBER_OF_CMD; j++) { 329 if (!(command & (1<<j))) 330 continue; 331 332 if (!(options & (1<<i))) { 333 if (commands_v_options[j][i] == '+') 334 xtables_error(PARAMETER_PROBLEM, 335 "You need to supply the `-%c' " 336 "option for this command\n", 337 optflags[i]); 338 } else { 339 if (commands_v_options[j][i] != 'x') 340 legal = 1; 341 else if (legal == 0) 342 legal = -1; 343 } 344 } 345 if (legal == -1) 346 xtables_error(PARAMETER_PROBLEM, 347 "Illegal option `-%c' with this command\n", 348 optflags[i]); 349 } 350} 351 352static char 353opt2char(int option) 354{ 355 const char *ptr; 356 for (ptr = optflags; option > 1; option >>= 1, ptr++); 357 358 return *ptr; 359} 360 361static char 362cmd2char(int option) 363{ 364 const char *ptr; 365 for (ptr = cmdflags; option > 1; option >>= 1, ptr++); 366 367 return *ptr; 368} 369 370static void 371add_command(unsigned int *cmd, const int newcmd, const int othercmds, 372 int invert) 373{ 374 if (invert) 375 xtables_error(PARAMETER_PROBLEM, "unexpected ! flag"); 376 if (*cmd & (~othercmds)) 377 xtables_error(PARAMETER_PROBLEM, "Cannot use -%c with -%c\n", 378 cmd2char(newcmd), cmd2char(*cmd & (~othercmds))); 379 *cmd |= newcmd; 380} 381 382/* 383 * All functions starting with "parse" should succeed, otherwise 384 * the program fails. 385 * Most routines return pointers to static data that may change 386 * between calls to the same or other routines with a few exceptions: 387 * "host_to_addr", "parse_hostnetwork", and "parse_hostnetworkmask" 388 * return global static data. 389*/ 390 391/* Christophe Burki wants `-p 6' to imply `-m tcp'. */ 392/* Can't be zero. */ 393static int 394parse_rulenumber(const char *rule) 395{ 396 unsigned int rulenum; 397 398 if (!xtables_strtoui(rule, NULL, &rulenum, 1, INT_MAX)) 399 xtables_error(PARAMETER_PROBLEM, 400 "Invalid rule number `%s'", rule); 401 402 return rulenum; 403} 404 405static const char * 406parse_target(const char *targetname) 407{ 408 const char *ptr; 409 410 if (strlen(targetname) < 1) 411 xtables_error(PARAMETER_PROBLEM, 412 "Invalid target name (too short)"); 413 414 if (strlen(targetname) >= XT_EXTENSION_MAXNAMELEN) 415 xtables_error(PARAMETER_PROBLEM, 416 "Invalid target name `%s' (%u chars max)", 417 targetname, XT_EXTENSION_MAXNAMELEN - 1); 418 419 for (ptr = targetname; *ptr; ptr++) 420 if (isspace(*ptr)) 421 xtables_error(PARAMETER_PROBLEM, 422 "Invalid target name `%s'", targetname); 423 return targetname; 424} 425 426static void 427set_option(unsigned int *options, unsigned int option, uint8_t *invflg, 428 int invert) 429{ 430 if (*options & option) 431 xtables_error(PARAMETER_PROBLEM, "multiple -%c flags not allowed", 432 opt2char(option)); 433 *options |= option; 434 435 if (invert) { 436 unsigned int i; 437 for (i = 0; 1 << i != option; i++); 438 439 if (!inverse_for_options[i]) 440 xtables_error(PARAMETER_PROBLEM, 441 "cannot have ! before -%c", 442 opt2char(option)); 443 *invflg |= inverse_for_options[i]; 444 } 445} 446 447static void 448print_num(uint64_t number, unsigned int format) 449{ 450 if (format & FMT_KILOMEGAGIGA) { 451 if (number > 99999) { 452 number = (number + 500) / 1000; 453 if (number > 9999) { 454 number = (number + 500) / 1000; 455 if (number > 9999) { 456 number = (number + 500) / 1000; 457 if (number > 9999) { 458 number = (number + 500) / 1000; 459 printf(FMT("%4lluT ","%lluT "), (unsigned long long)number); 460 } 461 else printf(FMT("%4lluG ","%lluG "), (unsigned long long)number); 462 } 463 else printf(FMT("%4lluM ","%lluM "), (unsigned long long)number); 464 } else 465 printf(FMT("%4lluK ","%lluK "), (unsigned long long)number); 466 } else 467 printf(FMT("%5llu ","%llu "), (unsigned long long)number); 468 } else 469 printf(FMT("%8llu ","%llu "), (unsigned long long)number); 470} 471 472 473static void 474print_header(unsigned int format, const char *chain, struct xtc_handle *handle) 475{ 476 struct xt_counters counters; 477 const char *pol = iptc_get_policy(chain, &counters, handle); 478 printf("Chain %s", chain); 479 if (pol) { 480 printf(" (policy %s", pol); 481 if (!(format & FMT_NOCOUNTS)) { 482 fputc(' ', stdout); 483 print_num(counters.pcnt, (format|FMT_NOTABLE)); 484 fputs("packets, ", stdout); 485 print_num(counters.bcnt, (format|FMT_NOTABLE)); 486 fputs("bytes", stdout); 487 } 488 printf(")\n"); 489 } else { 490 unsigned int refs; 491 if (!iptc_get_references(&refs, chain, handle)) 492 printf(" (ERROR obtaining refs)\n"); 493 else 494 printf(" (%u references)\n", refs); 495 } 496 497 if (format & FMT_LINENUMBERS) 498 printf(FMT("%-4s ", "%s "), "num"); 499 if (!(format & FMT_NOCOUNTS)) { 500 if (format & FMT_KILOMEGAGIGA) { 501 printf(FMT("%5s ","%s "), "pkts"); 502 printf(FMT("%5s ","%s "), "bytes"); 503 } else { 504 printf(FMT("%8s ","%s "), "pkts"); 505 printf(FMT("%10s ","%s "), "bytes"); 506 } 507 } 508 if (!(format & FMT_NOTARGET)) 509 printf(FMT("%-9s ","%s "), "target"); 510 fputs(" prot ", stdout); 511 if (format & FMT_OPTIONS) 512 fputs("opt", stdout); 513 if (format & FMT_VIA) { 514 printf(FMT(" %-6s ","%s "), "in"); 515 printf(FMT("%-6s ","%s "), "out"); 516 } 517 printf(FMT(" %-19s ","%s "), "source"); 518 printf(FMT(" %-19s "," %s "), "destination"); 519 printf("\n"); 520} 521 522 523static int 524print_match(const struct xt_entry_match *m, 525 const struct ipt_ip *ip, 526 int numeric) 527{ 528 const struct xtables_match *match = 529 xtables_find_match(m->u.user.name, XTF_TRY_LOAD, NULL); 530 531 if (match) { 532 if (match->print) 533 match->print(ip, m, numeric); 534 else 535 printf("%s ", match->name); 536 } else { 537 if (m->u.user.name[0]) 538 printf("UNKNOWN match `%s' ", m->u.user.name); 539 } 540 /* Don't stop iterating. */ 541 return 0; 542} 543 544/* e is called `fw' here for historical reasons */ 545static void 546print_firewall(const struct ipt_entry *fw, 547 const char *targname, 548 unsigned int num, 549 unsigned int format, 550 struct xtc_handle *const handle) 551{ 552 const struct xtables_target *target = NULL; 553 const struct xt_entry_target *t; 554 uint8_t flags; 555 char buf[BUFSIZ]; 556 557 if (!iptc_is_chain(targname, handle)) 558 target = xtables_find_target(targname, XTF_TRY_LOAD); 559 else 560 target = xtables_find_target(XT_STANDARD_TARGET, 561 XTF_LOAD_MUST_SUCCEED); 562 563 t = ipt_get_target((struct ipt_entry *)fw); 564 flags = fw->ip.flags; 565 566 if (format & FMT_LINENUMBERS) 567 printf(FMT("%-4u ", "%u "), num); 568 569 if (!(format & FMT_NOCOUNTS)) { 570 print_num(fw->counters.pcnt, format); 571 print_num(fw->counters.bcnt, format); 572 } 573 574 if (!(format & FMT_NOTARGET)) 575 printf(FMT("%-9s ", "%s "), targname); 576 577 fputc(fw->ip.invflags & XT_INV_PROTO ? '!' : ' ', stdout); 578 { 579 const char *pname = proto_to_name(fw->ip.proto, format&FMT_NUMERIC); 580 if (pname) 581 printf(FMT("%-5s", "%s "), pname); 582 else 583 printf(FMT("%-5hu", "%hu "), fw->ip.proto); 584 } 585 586 if (format & FMT_OPTIONS) { 587 if (format & FMT_NOTABLE) 588 fputs("opt ", stdout); 589 fputc(fw->ip.invflags & IPT_INV_FRAG ? '!' : '-', stdout); 590 fputc(flags & IPT_F_FRAG ? 'f' : '-', stdout); 591 fputc(' ', stdout); 592 } 593 594 if (format & FMT_VIA) { 595 char iface[IFNAMSIZ+2]; 596 597 if (fw->ip.invflags & IPT_INV_VIA_IN) { 598 iface[0] = '!'; 599 iface[1] = '\0'; 600 } 601 else iface[0] = '\0'; 602 603 if (fw->ip.iniface[0] != '\0') { 604 strcat(iface, fw->ip.iniface); 605 } 606 else if (format & FMT_NUMERIC) strcat(iface, "*"); 607 else strcat(iface, "any"); 608 printf(FMT(" %-6s ","in %s "), iface); 609 610 if (fw->ip.invflags & IPT_INV_VIA_OUT) { 611 iface[0] = '!'; 612 iface[1] = '\0'; 613 } 614 else iface[0] = '\0'; 615 616 if (fw->ip.outiface[0] != '\0') { 617 strcat(iface, fw->ip.outiface); 618 } 619 else if (format & FMT_NUMERIC) strcat(iface, "*"); 620 else strcat(iface, "any"); 621 printf(FMT("%-6s ","out %s "), iface); 622 } 623 624 fputc(fw->ip.invflags & IPT_INV_SRCIP ? '!' : ' ', stdout); 625 if (fw->ip.smsk.s_addr == 0L && !(format & FMT_NUMERIC)) 626 printf(FMT("%-19s ","%s "), "anywhere"); 627 else { 628 if (format & FMT_NUMERIC) 629 strcpy(buf, xtables_ipaddr_to_numeric(&fw->ip.src)); 630 else 631 strcpy(buf, xtables_ipaddr_to_anyname(&fw->ip.src)); 632 strcat(buf, xtables_ipmask_to_numeric(&fw->ip.smsk)); 633 printf(FMT("%-19s ","%s "), buf); 634 } 635 636 fputc(fw->ip.invflags & IPT_INV_DSTIP ? '!' : ' ', stdout); 637 if (fw->ip.dmsk.s_addr == 0L && !(format & FMT_NUMERIC)) 638 printf(FMT("%-19s ","-> %s"), "anywhere"); 639 else { 640 if (format & FMT_NUMERIC) 641 strcpy(buf, xtables_ipaddr_to_numeric(&fw->ip.dst)); 642 else 643 strcpy(buf, xtables_ipaddr_to_anyname(&fw->ip.dst)); 644 strcat(buf, xtables_ipmask_to_numeric(&fw->ip.dmsk)); 645 printf(FMT("%-19s ","-> %s"), buf); 646 } 647 648 if (format & FMT_NOTABLE) 649 fputs(" ", stdout); 650 651#ifdef IPT_F_GOTO 652 if(fw->ip.flags & IPT_F_GOTO) 653 printf("[goto] "); 654#endif 655 656 IPT_MATCH_ITERATE(fw, print_match, &fw->ip, format & FMT_NUMERIC); 657 658 if (target) { 659 if (target->print) 660 /* Print the target information. */ 661 target->print(&fw->ip, t, format & FMT_NUMERIC); 662 } else if (t->u.target_size != sizeof(*t)) 663 printf("[%u bytes of unknown target data] ", 664 (unsigned int)(t->u.target_size - sizeof(*t))); 665 666 if (!(format & FMT_NONEWLINE)) 667 fputc('\n', stdout); 668} 669 670static void 671print_firewall_line(const struct ipt_entry *fw, 672 struct xtc_handle *const h) 673{ 674 struct xt_entry_target *t; 675 676 t = ipt_get_target((struct ipt_entry *)fw); 677 print_firewall(fw, t->u.user.name, 0, FMT_PRINT_RULE, h); 678} 679 680static int 681append_entry(const xt_chainlabel chain, 682 struct ipt_entry *fw, 683 unsigned int nsaddrs, 684 const struct in_addr saddrs[], 685 const struct in_addr smasks[], 686 unsigned int ndaddrs, 687 const struct in_addr daddrs[], 688 const struct in_addr dmasks[], 689 int verbose, 690 struct xtc_handle *handle) 691{ 692 unsigned int i, j; 693 int ret = 1; 694 695 for (i = 0; i < nsaddrs; i++) { 696 fw->ip.src.s_addr = saddrs[i].s_addr; 697 fw->ip.smsk.s_addr = smasks[i].s_addr; 698 for (j = 0; j < ndaddrs; j++) { 699 fw->ip.dst.s_addr = daddrs[j].s_addr; 700 fw->ip.dmsk.s_addr = dmasks[j].s_addr; 701 if (verbose) 702 print_firewall_line(fw, handle); 703 ret &= iptc_append_entry(chain, fw, handle); 704 } 705 } 706 707 return ret; 708} 709 710static int 711replace_entry(const xt_chainlabel chain, 712 struct ipt_entry *fw, 713 unsigned int rulenum, 714 const struct in_addr *saddr, const struct in_addr *smask, 715 const struct in_addr *daddr, const struct in_addr *dmask, 716 int verbose, 717 struct xtc_handle *handle) 718{ 719 fw->ip.src.s_addr = saddr->s_addr; 720 fw->ip.dst.s_addr = daddr->s_addr; 721 fw->ip.smsk.s_addr = smask->s_addr; 722 fw->ip.dmsk.s_addr = dmask->s_addr; 723 724 if (verbose) 725 print_firewall_line(fw, handle); 726 return iptc_replace_entry(chain, fw, rulenum, handle); 727} 728 729static int 730insert_entry(const xt_chainlabel chain, 731 struct ipt_entry *fw, 732 unsigned int rulenum, 733 unsigned int nsaddrs, 734 const struct in_addr saddrs[], 735 const struct in_addr smasks[], 736 unsigned int ndaddrs, 737 const struct in_addr daddrs[], 738 const struct in_addr dmasks[], 739 int verbose, 740 struct xtc_handle *handle) 741{ 742 unsigned int i, j; 743 int ret = 1; 744 745 for (i = 0; i < nsaddrs; i++) { 746 fw->ip.src.s_addr = saddrs[i].s_addr; 747 fw->ip.smsk.s_addr = smasks[i].s_addr; 748 for (j = 0; j < ndaddrs; j++) { 749 fw->ip.dst.s_addr = daddrs[j].s_addr; 750 fw->ip.dmsk.s_addr = dmasks[j].s_addr; 751 if (verbose) 752 print_firewall_line(fw, handle); 753 ret &= iptc_insert_entry(chain, fw, rulenum, handle); 754 } 755 } 756 757 return ret; 758} 759 760static unsigned char * 761make_delete_mask(const struct xtables_rule_match *matches, 762 const struct xtables_target *target) 763{ 764 /* Establish mask for comparison */ 765 unsigned int size; 766 const struct xtables_rule_match *matchp; 767 unsigned char *mask, *mptr; 768 769 size = sizeof(struct ipt_entry); 770 for (matchp = matches; matchp; matchp = matchp->next) 771 size += XT_ALIGN(sizeof(struct xt_entry_match)) + matchp->match->size; 772 773 mask = xtables_calloc(1, size 774 + XT_ALIGN(sizeof(struct xt_entry_target)) 775 + target->size); 776 777 memset(mask, 0xFF, sizeof(struct ipt_entry)); 778 mptr = mask + sizeof(struct ipt_entry); 779 780 for (matchp = matches; matchp; matchp = matchp->next) { 781 memset(mptr, 0xFF, 782 XT_ALIGN(sizeof(struct xt_entry_match)) 783 + matchp->match->userspacesize); 784 mptr += XT_ALIGN(sizeof(struct xt_entry_match)) + matchp->match->size; 785 } 786 787 memset(mptr, 0xFF, 788 XT_ALIGN(sizeof(struct xt_entry_target)) 789 + target->userspacesize); 790 791 return mask; 792} 793 794static int 795delete_entry(const xt_chainlabel chain, 796 struct ipt_entry *fw, 797 unsigned int nsaddrs, 798 const struct in_addr saddrs[], 799 const struct in_addr smasks[], 800 unsigned int ndaddrs, 801 const struct in_addr daddrs[], 802 const struct in_addr dmasks[], 803 int verbose, 804 struct xtc_handle *handle, 805 struct xtables_rule_match *matches, 806 const struct xtables_target *target) 807{ 808 unsigned int i, j; 809 int ret = 1; 810 unsigned char *mask; 811 812 mask = make_delete_mask(matches, target); 813 for (i = 0; i < nsaddrs; i++) { 814 fw->ip.src.s_addr = saddrs[i].s_addr; 815 fw->ip.smsk.s_addr = smasks[i].s_addr; 816 for (j = 0; j < ndaddrs; j++) { 817 fw->ip.dst.s_addr = daddrs[j].s_addr; 818 fw->ip.dmsk.s_addr = dmasks[j].s_addr; 819 if (verbose) 820 print_firewall_line(fw, handle); 821 ret &= iptc_delete_entry(chain, fw, mask, handle); 822 } 823 } 824 free(mask); 825 826 return ret; 827} 828 829static int 830check_entry(const xt_chainlabel chain, struct ipt_entry *fw, 831 unsigned int nsaddrs, const struct in_addr *saddrs, 832 const struct in_addr *smasks, unsigned int ndaddrs, 833 const struct in_addr *daddrs, const struct in_addr *dmasks, 834 bool verbose, struct xtc_handle *handle, 835 struct xtables_rule_match *matches, 836 const struct xtables_target *target) 837{ 838 unsigned int i, j; 839 int ret = 1; 840 unsigned char *mask; 841 842 mask = make_delete_mask(matches, target); 843 for (i = 0; i < nsaddrs; i++) { 844 fw->ip.src.s_addr = saddrs[i].s_addr; 845 fw->ip.smsk.s_addr = smasks[i].s_addr; 846 for (j = 0; j < ndaddrs; j++) { 847 fw->ip.dst.s_addr = daddrs[j].s_addr; 848 fw->ip.dmsk.s_addr = dmasks[j].s_addr; 849 if (verbose) 850 print_firewall_line(fw, handle); 851 ret &= iptc_check_entry(chain, fw, mask, handle); 852 } 853 } 854 855 free(mask); 856 return ret; 857} 858 859int 860for_each_chain4(int (*fn)(const xt_chainlabel, int, struct xtc_handle *), 861 int verbose, int builtinstoo, struct xtc_handle *handle) 862{ 863 int ret = 1; 864 const char *chain; 865 char *chains; 866 unsigned int i, chaincount = 0; 867 868 chain = iptc_first_chain(handle); 869 while (chain) { 870 chaincount++; 871 chain = iptc_next_chain(handle); 872 } 873 874 chains = xtables_malloc(sizeof(xt_chainlabel) * chaincount); 875 i = 0; 876 chain = iptc_first_chain(handle); 877 while (chain) { 878 strcpy(chains + i*sizeof(xt_chainlabel), chain); 879 i++; 880 chain = iptc_next_chain(handle); 881 } 882 883 for (i = 0; i < chaincount; i++) { 884 if (!builtinstoo 885 && iptc_builtin(chains + i*sizeof(xt_chainlabel), 886 handle) == 1) 887 continue; 888 ret &= fn(chains + i*sizeof(xt_chainlabel), verbose, handle); 889 } 890 891 free(chains); 892 return ret; 893} 894 895int 896flush_entries4(const xt_chainlabel chain, int verbose, 897 struct xtc_handle *handle) 898{ 899 if (!chain) 900 return for_each_chain4(flush_entries4, verbose, 1, handle); 901 902 if (verbose) 903 fprintf(stdout, "Flushing chain `%s'\n", chain); 904 return iptc_flush_entries(chain, handle); 905} 906 907static int 908zero_entries(const xt_chainlabel chain, int verbose, 909 struct xtc_handle *handle) 910{ 911 if (!chain) 912 return for_each_chain4(zero_entries, verbose, 1, handle); 913 914 if (verbose) 915 fprintf(stdout, "Zeroing chain `%s'\n", chain); 916 return iptc_zero_entries(chain, handle); 917} 918 919int 920delete_chain4(const xt_chainlabel chain, int verbose, 921 struct xtc_handle *handle) 922{ 923 if (!chain) 924 return for_each_chain4(delete_chain4, verbose, 0, handle); 925 926 if (verbose) 927 fprintf(stdout, "Deleting chain `%s'\n", chain); 928 return iptc_delete_chain(chain, handle); 929} 930 931static int 932list_entries(const xt_chainlabel chain, int rulenum, int verbose, int numeric, 933 int expanded, int linenumbers, struct xtc_handle *handle) 934{ 935 int found = 0; 936 unsigned int format; 937 const char *this; 938 939 format = FMT_OPTIONS; 940 if (!verbose) 941 format |= FMT_NOCOUNTS; 942 else 943 format |= FMT_VIA; 944 945 if (numeric) 946 format |= FMT_NUMERIC; 947 948 if (!expanded) 949 format |= FMT_KILOMEGAGIGA; 950 951 if (linenumbers) 952 format |= FMT_LINENUMBERS; 953 954 for (this = iptc_first_chain(handle); 955 this; 956 this = iptc_next_chain(handle)) { 957 const struct ipt_entry *i; 958 unsigned int num; 959 960 if (chain && strcmp(chain, this) != 0) 961 continue; 962 963 if (found) printf("\n"); 964 965 if (!rulenum) 966 print_header(format, this, handle); 967 i = iptc_first_rule(this, handle); 968 969 num = 0; 970 while (i) { 971 num++; 972 if (!rulenum || num == rulenum) 973 print_firewall(i, 974 iptc_get_target(i, handle), 975 num, 976 format, 977 handle); 978 i = iptc_next_rule(i, handle); 979 } 980 found = 1; 981 } 982 983 errno = ENOENT; 984 return found; 985} 986 987static void print_proto(uint16_t proto, int invert) 988{ 989 if (proto) { 990 unsigned int i; 991 const char *invertstr = invert ? " !" : ""; 992 993 const struct protoent *pent = getprotobynumber(proto); 994 if (pent) { 995 printf("%s -p %s", invertstr, pent->p_name); 996 return; 997 } 998 999 for (i = 0; xtables_chain_protos[i].name != NULL; ++i) 1000 if (xtables_chain_protos[i].num == proto) { 1001 printf("%s -p %s", 1002 invertstr, xtables_chain_protos[i].name); 1003 return; 1004 } 1005 1006 printf("%s -p %u", invertstr, proto); 1007 } 1008} 1009 1010#define IP_PARTS_NATIVE(n) \ 1011(unsigned int)((n)>>24)&0xFF, \ 1012(unsigned int)((n)>>16)&0xFF, \ 1013(unsigned int)((n)>>8)&0xFF, \ 1014(unsigned int)((n)&0xFF) 1015 1016#define IP_PARTS(n) IP_PARTS_NATIVE(ntohl(n)) 1017 1018/* This assumes that mask is contiguous, and byte-bounded. */ 1019static void 1020print_iface(char letter, const char *iface, const unsigned char *mask, 1021 int invert) 1022{ 1023 unsigned int i; 1024 1025 if (mask[0] == 0) 1026 return; 1027 1028 printf("%s -%c ", invert ? " !" : "", letter); 1029 1030 for (i = 0; i < IFNAMSIZ; i++) { 1031 if (mask[i] != 0) { 1032 if (iface[i] != '\0') 1033 printf("%c", iface[i]); 1034 } else { 1035 /* we can access iface[i-1] here, because 1036 * a few lines above we make sure that mask[0] != 0 */ 1037 if (iface[i-1] != '\0') 1038 printf("+"); 1039 break; 1040 } 1041 } 1042} 1043 1044static int print_match_save(const struct xt_entry_match *e, 1045 const struct ipt_ip *ip) 1046{ 1047 const struct xtables_match *match = 1048 xtables_find_match(e->u.user.name, XTF_TRY_LOAD, NULL); 1049 1050 if (match) { 1051 printf(" -m %s", e->u.user.name); 1052 1053 /* some matches don't provide a save function */ 1054 if (match->save) 1055 match->save(ip, e); 1056 } else { 1057 if (e->u.match_size) { 1058 fprintf(stderr, 1059 "Can't find library for match `%s'\n", 1060 e->u.user.name); 1061 exit(1); 1062 } 1063 } 1064 return 0; 1065} 1066 1067/* print a given ip including mask if neccessary */ 1068static void print_ip(const char *prefix, uint32_t ip, 1069 uint32_t mask, int invert) 1070{ 1071 uint32_t bits, hmask = ntohl(mask); 1072 int i; 1073 1074 if (!mask && !ip && !invert) 1075 return; 1076 1077 printf("%s %s %u.%u.%u.%u", 1078 invert ? " !" : "", 1079 prefix, 1080 IP_PARTS(ip)); 1081 1082 if (mask == 0xFFFFFFFFU) { 1083 printf("/32"); 1084 return; 1085 } 1086 1087 i = 32; 1088 bits = 0xFFFFFFFEU; 1089 while (--i >= 0 && hmask != bits) 1090 bits <<= 1; 1091 if (i >= 0) 1092 printf("/%u", i); 1093 else 1094 printf("/%u.%u.%u.%u", IP_PARTS(mask)); 1095} 1096 1097/* We want this to be readable, so only print out neccessary fields. 1098 * Because that's the kind of world I want to live in. */ 1099void print_rule4(const struct ipt_entry *e, 1100 struct xtc_handle *h, const char *chain, int counters) 1101{ 1102 const struct xt_entry_target *t; 1103 const char *target_name; 1104 1105 /* print counters for iptables-save */ 1106 if (counters > 0) 1107 printf("[%llu:%llu] ", (unsigned long long)e->counters.pcnt, (unsigned long long)e->counters.bcnt); 1108 1109 /* print chain name */ 1110 printf("-A %s", chain); 1111 1112 /* Print IP part. */ 1113 print_ip("-s", e->ip.src.s_addr,e->ip.smsk.s_addr, 1114 e->ip.invflags & IPT_INV_SRCIP); 1115 1116 print_ip("-d", e->ip.dst.s_addr, e->ip.dmsk.s_addr, 1117 e->ip.invflags & IPT_INV_DSTIP); 1118 1119 print_iface('i', e->ip.iniface, e->ip.iniface_mask, 1120 e->ip.invflags & IPT_INV_VIA_IN); 1121 1122 print_iface('o', e->ip.outiface, e->ip.outiface_mask, 1123 e->ip.invflags & IPT_INV_VIA_OUT); 1124 1125 print_proto(e->ip.proto, e->ip.invflags & XT_INV_PROTO); 1126 1127 if (e->ip.flags & IPT_F_FRAG) 1128 printf("%s -f", 1129 e->ip.invflags & IPT_INV_FRAG ? " !" : ""); 1130 1131 /* Print matchinfo part */ 1132 if (e->target_offset) { 1133 IPT_MATCH_ITERATE(e, print_match_save, &e->ip); 1134 } 1135 1136 /* print counters for iptables -R */ 1137 if (counters < 0) 1138 printf(" -c %llu %llu", (unsigned long long)e->counters.pcnt, (unsigned long long)e->counters.bcnt); 1139 1140 /* Print target name */ 1141 target_name = iptc_get_target(e, h); 1142 if (target_name && (*target_name != '\0')) 1143#ifdef IPT_F_GOTO 1144 printf(" -%c %s", e->ip.flags & IPT_F_GOTO ? 'g' : 'j', target_name); 1145#else 1146 printf(" -j %s", target_name); 1147#endif 1148 1149 /* Print targinfo part */ 1150 t = ipt_get_target((struct ipt_entry *)e); 1151 if (t->u.user.name[0]) { 1152 const struct xtables_target *target = 1153 xtables_find_target(t->u.user.name, XTF_TRY_LOAD); 1154 1155 if (!target) { 1156 fprintf(stderr, "Can't find library for target `%s'\n", 1157 t->u.user.name); 1158 exit(1); 1159 } 1160 1161 if (target->save) 1162 target->save(&e->ip, t); 1163 else { 1164 /* If the target size is greater than xt_entry_target 1165 * there is something to be saved, we just don't know 1166 * how to print it */ 1167 if (t->u.target_size != 1168 sizeof(struct xt_entry_target)) { 1169 fprintf(stderr, "Target `%s' is missing " 1170 "save function\n", 1171 t->u.user.name); 1172 exit(1); 1173 } 1174 } 1175 } 1176 printf("\n"); 1177} 1178 1179static int 1180list_rules(const xt_chainlabel chain, int rulenum, int counters, 1181 struct xtc_handle *handle) 1182{ 1183 const char *this = NULL; 1184 int found = 0; 1185 1186 if (counters) 1187 counters = -1; /* iptables -c format */ 1188 1189 /* Dump out chain names first, 1190 * thereby preventing dependency conflicts */ 1191 if (!rulenum) for (this = iptc_first_chain(handle); 1192 this; 1193 this = iptc_next_chain(handle)) { 1194 if (chain && strcmp(this, chain) != 0) 1195 continue; 1196 1197 if (iptc_builtin(this, handle)) { 1198 struct xt_counters count; 1199 printf("-P %s %s", this, iptc_get_policy(this, &count, handle)); 1200 if (counters) 1201 printf(" -c %llu %llu", (unsigned long long)count.pcnt, (unsigned long long)count.bcnt); 1202 printf("\n"); 1203 } else { 1204 printf("-N %s\n", this); 1205 } 1206 } 1207 1208 for (this = iptc_first_chain(handle); 1209 this; 1210 this = iptc_next_chain(handle)) { 1211 const struct ipt_entry *e; 1212 int num = 0; 1213 1214 if (chain && strcmp(this, chain) != 0) 1215 continue; 1216 1217 /* Dump out rules */ 1218 e = iptc_first_rule(this, handle); 1219 while(e) { 1220 num++; 1221 if (!rulenum || num == rulenum) 1222 print_rule4(e, handle, this, counters); 1223 e = iptc_next_rule(e, handle); 1224 } 1225 found = 1; 1226 } 1227 1228 errno = ENOENT; 1229 return found; 1230} 1231 1232static struct ipt_entry * 1233generate_entry(const struct ipt_entry *fw, 1234 struct xtables_rule_match *matches, 1235 struct xt_entry_target *target) 1236{ 1237 unsigned int size; 1238 struct xtables_rule_match *matchp; 1239 struct ipt_entry *e; 1240 1241 size = sizeof(struct ipt_entry); 1242 for (matchp = matches; matchp; matchp = matchp->next) 1243 size += matchp->match->m->u.match_size; 1244 1245 e = xtables_malloc(size + target->u.target_size); 1246 *e = *fw; 1247 e->target_offset = size; 1248 e->next_offset = size + target->u.target_size; 1249 1250 size = 0; 1251 for (matchp = matches; matchp; matchp = matchp->next) { 1252 memcpy(e->elems + size, matchp->match->m, matchp->match->m->u.match_size); 1253 size += matchp->match->m->u.match_size; 1254 } 1255 memcpy(e->elems + size, target, target->u.target_size); 1256 1257 return e; 1258} 1259 1260static void clear_rule_matches(struct xtables_rule_match **matches) 1261{ 1262 struct xtables_rule_match *matchp, *tmp; 1263 1264 for (matchp = *matches; matchp;) { 1265 tmp = matchp->next; 1266 if (matchp->match->m) { 1267 free(matchp->match->m); 1268 matchp->match->m = NULL; 1269 } 1270 if (matchp->match == matchp->match->next) { 1271 free(matchp->match); 1272 matchp->match = NULL; 1273 } 1274 free(matchp); 1275 matchp = tmp; 1276 } 1277 1278 *matches = NULL; 1279} 1280 1281static void command_jump(struct iptables_command_state *cs) 1282{ 1283 size_t size; 1284 1285 set_option(&cs->options, OPT_JUMP, &cs->fw.ip.invflags, cs->invert); 1286 cs->jumpto = parse_target(optarg); 1287 /* TRY_LOAD (may be chain name) */ 1288 cs->target = xtables_find_target(cs->jumpto, XTF_TRY_LOAD); 1289 1290 if (cs->target == NULL) 1291 return; 1292 1293 size = XT_ALIGN(sizeof(struct xt_entry_target)) 1294 + cs->target->size; 1295 1296 cs->target->t = xtables_calloc(1, size); 1297 cs->target->t->u.target_size = size; 1298 strcpy(cs->target->t->u.user.name, cs->target->real_name); 1299 cs->target->t->u.user.revision = cs->target->revision; 1300 if (cs->target->real_name != cs->target->name) 1301 /* Alias support for userspace side */ 1302 fprintf(stderr, "WARNING: The %s target is obsolete. " 1303 "Use %s instead.\n", 1304 cs->jumpto, cs->target->real_name); 1305 1306 xs_init_target(cs->target); 1307 1308 if (cs->target->x6_options != NULL) 1309 opts = xtables_options_xfrm(iptables_globals.orig_opts, opts, 1310 cs->target->x6_options, 1311 &cs->target->option_offset); 1312 else 1313 opts = xtables_merge_options(iptables_globals.orig_opts, opts, 1314 cs->target->extra_opts, 1315 &cs->target->option_offset); 1316 if (opts == NULL) 1317 xtables_error(OTHER_PROBLEM, "can't alloc memory!"); 1318} 1319 1320static void command_match(struct iptables_command_state *cs) 1321{ 1322 struct xtables_match *m; 1323 size_t size; 1324 1325 if (cs->invert) 1326 xtables_error(PARAMETER_PROBLEM, 1327 "unexpected ! flag before --match"); 1328 1329 m = xtables_find_match(optarg, XTF_LOAD_MUST_SUCCEED, &cs->matches); 1330 size = XT_ALIGN(sizeof(struct xt_entry_match)) + m->size; 1331 m->m = xtables_calloc(1, size); 1332 m->m->u.match_size = size; 1333 strcpy(m->m->u.user.name, m->name); 1334 m->m->u.user.revision = m->revision; 1335 xs_init_match(m); 1336 if (m == m->next) 1337 return; 1338 /* Merge options for non-cloned matches */ 1339 if (m->x6_options != NULL) 1340 opts = xtables_options_xfrm(iptables_globals.orig_opts, opts, 1341 m->x6_options, &m->option_offset); 1342 else if (m->extra_opts != NULL) 1343 opts = xtables_merge_options(iptables_globals.orig_opts, opts, 1344 m->extra_opts, &m->option_offset); 1345 if (opts == NULL) 1346 xtables_error(OTHER_PROBLEM, "can't alloc memory!"); 1347} 1348 1349int do_command4(int argc, char *argv[], char **table, struct xtc_handle **handle) 1350{ 1351 struct iptables_command_state cs; 1352 struct ipt_entry *e = NULL; 1353 unsigned int nsaddrs = 0, ndaddrs = 0; 1354 struct in_addr *saddrs = NULL, *smasks = NULL; 1355 struct in_addr *daddrs = NULL, *dmasks = NULL; 1356 1357 int verbose = 0; 1358 const char *chain = NULL; 1359 const char *shostnetworkmask = NULL, *dhostnetworkmask = NULL; 1360 const char *policy = NULL, *newname = NULL; 1361 unsigned int rulenum = 0, command = 0; 1362 const char *pcnt = NULL, *bcnt = NULL; 1363 int ret = 1; 1364 struct xtables_match *m; 1365 struct xtables_rule_match *matchp; 1366 struct xtables_target *t; 1367 unsigned long long cnt; 1368 1369 memset(&cs, 0, sizeof(cs)); 1370 cs.jumpto = ""; 1371 cs.argv = argv; 1372 1373 /* re-set optind to 0 in case do_command4 gets called 1374 * a second time */ 1375 optind = 0; 1376 1377 /* clear mflags in case do_command4 gets called a second time 1378 * (we clear the global list of all matches for security)*/ 1379 for (m = xtables_matches; m; m = m->next) 1380 m->mflags = 0; 1381 1382 for (t = xtables_targets; t; t = t->next) { 1383 t->tflags = 0; 1384 t->used = 0; 1385 } 1386 1387 /* Suppress error messages: we may add new options if we 1388 demand-load a protocol. */ 1389 opterr = 0; 1390 1391 opts = xt_params->orig_opts; 1392 while ((cs.c = getopt_long(argc, argv, 1393 "-:A:C:D:R:I:L::S::M:F::Z::N:X::E:P:Vh::o:p:s:d:j:i:fbvnt:m:xc:g:46", 1394 opts, NULL)) != -1) { 1395 switch (cs.c) { 1396 /* 1397 * Command selection 1398 */ 1399 case 'A': 1400 add_command(&command, CMD_APPEND, CMD_NONE, 1401 cs.invert); 1402 chain = optarg; 1403 break; 1404 1405 case 'C': 1406 add_command(&command, CMD_CHECK, CMD_NONE, 1407 cs.invert); 1408 chain = optarg; 1409 break; 1410 1411 case 'D': 1412 add_command(&command, CMD_DELETE, CMD_NONE, 1413 cs.invert); 1414 chain = optarg; 1415 if (optind < argc && argv[optind][0] != '-' 1416 && argv[optind][0] != '!') { 1417 rulenum = parse_rulenumber(argv[optind++]); 1418 command = CMD_DELETE_NUM; 1419 } 1420 break; 1421 1422 case 'R': 1423 add_command(&command, CMD_REPLACE, CMD_NONE, 1424 cs.invert); 1425 chain = optarg; 1426 if (optind < argc && argv[optind][0] != '-' 1427 && argv[optind][0] != '!') 1428 rulenum = parse_rulenumber(argv[optind++]); 1429 else 1430 xtables_error(PARAMETER_PROBLEM, 1431 "-%c requires a rule number", 1432 cmd2char(CMD_REPLACE)); 1433 break; 1434 1435 case 'I': 1436 add_command(&command, CMD_INSERT, CMD_NONE, 1437 cs.invert); 1438 chain = optarg; 1439 if (optind < argc && argv[optind][0] != '-' 1440 && argv[optind][0] != '!') 1441 rulenum = parse_rulenumber(argv[optind++]); 1442 else rulenum = 1; 1443 break; 1444 1445 case 'L': 1446 add_command(&command, CMD_LIST, 1447 CMD_ZERO | CMD_ZERO_NUM, cs.invert); 1448 if (optarg) chain = optarg; 1449 else if (optind < argc && argv[optind][0] != '-' 1450 && argv[optind][0] != '!') 1451 chain = argv[optind++]; 1452 if (optind < argc && argv[optind][0] != '-' 1453 && argv[optind][0] != '!') 1454 rulenum = parse_rulenumber(argv[optind++]); 1455 break; 1456 1457 case 'S': 1458 add_command(&command, CMD_LIST_RULES, 1459 CMD_ZERO|CMD_ZERO_NUM, cs.invert); 1460 if (optarg) chain = optarg; 1461 else if (optind < argc && argv[optind][0] != '-' 1462 && argv[optind][0] != '!') 1463 chain = argv[optind++]; 1464 if (optind < argc && argv[optind][0] != '-' 1465 && argv[optind][0] != '!') 1466 rulenum = parse_rulenumber(argv[optind++]); 1467 break; 1468 1469 case 'F': 1470 add_command(&command, CMD_FLUSH, CMD_NONE, 1471 cs.invert); 1472 if (optarg) chain = optarg; 1473 else if (optind < argc && argv[optind][0] != '-' 1474 && argv[optind][0] != '!') 1475 chain = argv[optind++]; 1476 break; 1477 1478 case 'Z': 1479 add_command(&command, CMD_ZERO, CMD_LIST|CMD_LIST_RULES, 1480 cs.invert); 1481 if (optarg) chain = optarg; 1482 else if (optind < argc && argv[optind][0] != '-' 1483 && argv[optind][0] != '!') 1484 chain = argv[optind++]; 1485 if (optind < argc && argv[optind][0] != '-' 1486 && argv[optind][0] != '!') { 1487 rulenum = parse_rulenumber(argv[optind++]); 1488 command = CMD_ZERO_NUM; 1489 } 1490 break; 1491 1492 case 'N': 1493 if (optarg && (*optarg == '-' || *optarg == '!')) 1494 xtables_error(PARAMETER_PROBLEM, 1495 "chain name not allowed to start " 1496 "with `%c'\n", *optarg); 1497 if (xtables_find_target(optarg, XTF_TRY_LOAD)) 1498 xtables_error(PARAMETER_PROBLEM, 1499 "chain name may not clash " 1500 "with target name\n"); 1501 add_command(&command, CMD_NEW_CHAIN, CMD_NONE, 1502 cs.invert); 1503 chain = optarg; 1504 break; 1505 1506 case 'X': 1507 add_command(&command, CMD_DELETE_CHAIN, CMD_NONE, 1508 cs.invert); 1509 if (optarg) chain = optarg; 1510 else if (optind < argc && argv[optind][0] != '-' 1511 && argv[optind][0] != '!') 1512 chain = argv[optind++]; 1513 break; 1514 1515 case 'E': 1516 add_command(&command, CMD_RENAME_CHAIN, CMD_NONE, 1517 cs.invert); 1518 chain = optarg; 1519 if (optind < argc && argv[optind][0] != '-' 1520 && argv[optind][0] != '!') 1521 newname = argv[optind++]; 1522 else 1523 xtables_error(PARAMETER_PROBLEM, 1524 "-%c requires old-chain-name and " 1525 "new-chain-name", 1526 cmd2char(CMD_RENAME_CHAIN)); 1527 break; 1528 1529 case 'P': 1530 add_command(&command, CMD_SET_POLICY, CMD_NONE, 1531 cs.invert); 1532 chain = optarg; 1533 if (optind < argc && argv[optind][0] != '-' 1534 && argv[optind][0] != '!') 1535 policy = argv[optind++]; 1536 else 1537 xtables_error(PARAMETER_PROBLEM, 1538 "-%c requires a chain and a policy", 1539 cmd2char(CMD_SET_POLICY)); 1540 break; 1541 1542 case 'h': 1543 if (!optarg) 1544 optarg = argv[optind]; 1545 1546 /* iptables -p icmp -h */ 1547 if (!cs.matches && cs.protocol) 1548 xtables_find_match(cs.protocol, 1549 XTF_TRY_LOAD, &cs.matches); 1550 1551 exit_printhelp(cs.matches); 1552 1553 /* 1554 * Option selection 1555 */ 1556 case 'p': 1557 set_option(&cs.options, OPT_PROTOCOL, &cs.fw.ip.invflags, 1558 cs.invert); 1559 1560 /* Canonicalize into lower case */ 1561 for (cs.protocol = optarg; *cs.protocol; cs.protocol++) 1562 *cs.protocol = tolower(*cs.protocol); 1563 1564 cs.protocol = optarg; 1565 cs.fw.ip.proto = xtables_parse_protocol(cs.protocol); 1566 1567 if (cs.fw.ip.proto == 0 1568 && (cs.fw.ip.invflags & XT_INV_PROTO)) 1569 xtables_error(PARAMETER_PROBLEM, 1570 "rule would never match protocol"); 1571 break; 1572 1573 case 's': 1574 set_option(&cs.options, OPT_SOURCE, &cs.fw.ip.invflags, 1575 cs.invert); 1576 shostnetworkmask = optarg; 1577 break; 1578 1579 case 'd': 1580 set_option(&cs.options, OPT_DESTINATION, &cs.fw.ip.invflags, 1581 cs.invert); 1582 dhostnetworkmask = optarg; 1583 break; 1584 1585#ifdef IPT_F_GOTO 1586 case 'g': 1587 set_option(&cs.options, OPT_JUMP, &cs.fw.ip.invflags, 1588 cs.invert); 1589 cs.fw.ip.flags |= IPT_F_GOTO; 1590 cs.jumpto = parse_target(optarg); 1591 break; 1592#endif 1593 1594 case 'j': 1595 command_jump(&cs); 1596 break; 1597 1598 1599 case 'i': 1600 if (*optarg == '\0') 1601 xtables_error(PARAMETER_PROBLEM, 1602 "Empty interface is likely to be " 1603 "undesired"); 1604 set_option(&cs.options, OPT_VIANAMEIN, &cs.fw.ip.invflags, 1605 cs.invert); 1606 xtables_parse_interface(optarg, 1607 cs.fw.ip.iniface, 1608 cs.fw.ip.iniface_mask); 1609 break; 1610 1611 case 'o': 1612 if (*optarg == '\0') 1613 xtables_error(PARAMETER_PROBLEM, 1614 "Empty interface is likely to be " 1615 "undesired"); 1616 set_option(&cs.options, OPT_VIANAMEOUT, &cs.fw.ip.invflags, 1617 cs.invert); 1618 xtables_parse_interface(optarg, 1619 cs.fw.ip.outiface, 1620 cs.fw.ip.outiface_mask); 1621 break; 1622 1623 case 'f': 1624 set_option(&cs.options, OPT_FRAGMENT, &cs.fw.ip.invflags, 1625 cs.invert); 1626 cs.fw.ip.flags |= IPT_F_FRAG; 1627 break; 1628 1629 case 'v': 1630 if (!verbose) 1631 set_option(&cs.options, OPT_VERBOSE, 1632 &cs.fw.ip.invflags, cs.invert); 1633 verbose++; 1634 break; 1635 1636 case 'm': 1637 command_match(&cs); 1638 break; 1639 1640 case 'n': 1641 set_option(&cs.options, OPT_NUMERIC, &cs.fw.ip.invflags, 1642 cs.invert); 1643 break; 1644 1645 case 't': 1646 if (cs.invert) 1647 xtables_error(PARAMETER_PROBLEM, 1648 "unexpected ! flag before --table"); 1649 *table = optarg; 1650 break; 1651 1652 case 'x': 1653 set_option(&cs.options, OPT_EXPANDED, &cs.fw.ip.invflags, 1654 cs.invert); 1655 break; 1656 1657 case 'V': 1658 if (cs.invert) 1659 printf("Not %s ;-)\n", prog_vers); 1660 else 1661 printf("%s v%s\n", 1662 prog_name, prog_vers); 1663 exit(0); 1664 1665 case '0': 1666 set_option(&cs.options, OPT_LINENUMBERS, &cs.fw.ip.invflags, 1667 cs.invert); 1668 break; 1669 1670 case 'M': 1671 xtables_modprobe_program = optarg; 1672 break; 1673 1674 case 'c': 1675 1676 set_option(&cs.options, OPT_COUNTERS, &cs.fw.ip.invflags, 1677 cs.invert); 1678 pcnt = optarg; 1679 bcnt = strchr(pcnt + 1, ','); 1680 if (bcnt) 1681 bcnt++; 1682 if (!bcnt && optind < argc && argv[optind][0] != '-' 1683 && argv[optind][0] != '!') 1684 bcnt = argv[optind++]; 1685 if (!bcnt) 1686 xtables_error(PARAMETER_PROBLEM, 1687 "-%c requires packet and byte counter", 1688 opt2char(OPT_COUNTERS)); 1689 1690 if (sscanf(pcnt, "%llu", &cnt) != 1) 1691 xtables_error(PARAMETER_PROBLEM, 1692 "-%c packet counter not numeric", 1693 opt2char(OPT_COUNTERS)); 1694 cs.fw.counters.pcnt = cnt; 1695 1696 if (sscanf(bcnt, "%llu", &cnt) != 1) 1697 xtables_error(PARAMETER_PROBLEM, 1698 "-%c byte counter not numeric", 1699 opt2char(OPT_COUNTERS)); 1700 cs.fw.counters.bcnt = cnt; 1701 break; 1702 1703 case '4': 1704 /* This is indeed the IPv4 iptables */ 1705 break; 1706 1707 case '6': 1708 /* This is not the IPv6 ip6tables */ 1709 if (line != -1) 1710 return 1; /* success: line ignored */ 1711 fprintf(stderr, "This is the IPv4 version of iptables.\n"); 1712 exit_tryhelp(2); 1713 1714 case 1: /* non option */ 1715 if (optarg[0] == '!' && optarg[1] == '\0') { 1716 if (cs.invert) 1717 xtables_error(PARAMETER_PROBLEM, 1718 "multiple consecutive ! not" 1719 " allowed"); 1720 cs.invert = TRUE; 1721 optarg[0] = '\0'; 1722 continue; 1723 } 1724 fprintf(stderr, "Bad argument `%s'\n", optarg); 1725 exit_tryhelp(2); 1726 1727 default: 1728 if (command_default(&cs, &iptables_globals) == 1) 1729 /* cf. ip6tables.c */ 1730 continue; 1731 break; 1732 } 1733 cs.invert = FALSE; 1734 } 1735 1736 if (strcmp(*table, "nat") == 0 && 1737 ((policy != NULL && strcmp(policy, "DROP") == 0) || 1738 (cs.jumpto != NULL && strcmp(cs.jumpto, "DROP") == 0))) 1739 xtables_error(PARAMETER_PROBLEM, 1740 "\nThe \"nat\" table is not intended for filtering, " 1741 "the use of DROP is therefore inhibited.\n\n"); 1742 1743 for (matchp = cs.matches; matchp; matchp = matchp->next) 1744 xtables_option_mfcall(matchp->match); 1745 if (cs.target != NULL) 1746 xtables_option_tfcall(cs.target); 1747 1748 /* Fix me: must put inverse options checking here --MN */ 1749 1750 if (optind < argc) 1751 xtables_error(PARAMETER_PROBLEM, 1752 "unknown arguments found on commandline"); 1753 if (!command) 1754 xtables_error(PARAMETER_PROBLEM, "no command specified"); 1755 if (cs.invert) 1756 xtables_error(PARAMETER_PROBLEM, 1757 "nothing appropriate following !"); 1758 1759 if (command & (CMD_REPLACE | CMD_INSERT | CMD_DELETE | CMD_APPEND | CMD_CHECK)) { 1760 if (!(cs.options & OPT_DESTINATION)) 1761 dhostnetworkmask = "0.0.0.0/0"; 1762 if (!(cs.options & OPT_SOURCE)) 1763 shostnetworkmask = "0.0.0.0/0"; 1764 } 1765 1766 if (shostnetworkmask) 1767 xtables_ipparse_multiple(shostnetworkmask, &saddrs, 1768 &smasks, &nsaddrs); 1769 1770 if (dhostnetworkmask) 1771 xtables_ipparse_multiple(dhostnetworkmask, &daddrs, 1772 &dmasks, &ndaddrs); 1773 1774 if ((nsaddrs > 1 || ndaddrs > 1) && 1775 (cs.fw.ip.invflags & (IPT_INV_SRCIP | IPT_INV_DSTIP))) 1776 xtables_error(PARAMETER_PROBLEM, "! not allowed with multiple" 1777 " source or destination IP addresses"); 1778 1779 if (command == CMD_REPLACE && (nsaddrs != 1 || ndaddrs != 1)) 1780 xtables_error(PARAMETER_PROBLEM, "Replacement rule does not " 1781 "specify a unique address"); 1782 1783 generic_opt_check(command, cs.options); 1784 1785 if (chain != NULL && strlen(chain) >= XT_EXTENSION_MAXNAMELEN) 1786 xtables_error(PARAMETER_PROBLEM, 1787 "chain name `%s' too long (must be under %u chars)", 1788 chain, XT_EXTENSION_MAXNAMELEN); 1789 1790 /* only allocate handle if we weren't called with a handle */ 1791 if (!*handle) 1792 *handle = iptc_init(*table); 1793 1794 /* try to insmod the module if iptc_init failed */ 1795 if (!*handle && xtables_load_ko(xtables_modprobe_program, false) != -1) 1796 *handle = iptc_init(*table); 1797 1798 if (!*handle) 1799 xtables_error(VERSION_PROBLEM, 1800 "can't initialize iptables table `%s': %s", 1801 *table, iptc_strerror(errno)); 1802 1803 if (command == CMD_APPEND 1804 || command == CMD_DELETE 1805 || command == CMD_CHECK 1806 || command == CMD_INSERT 1807 || command == CMD_REPLACE) { 1808 if (strcmp(chain, "PREROUTING") == 0 1809 || strcmp(chain, "INPUT") == 0) { 1810 /* -o not valid with incoming packets. */ 1811 if (cs.options & OPT_VIANAMEOUT) 1812 xtables_error(PARAMETER_PROBLEM, 1813 "Can't use -%c with %s\n", 1814 opt2char(OPT_VIANAMEOUT), 1815 chain); 1816 } 1817 1818 if (strcmp(chain, "POSTROUTING") == 0 1819 || strcmp(chain, "OUTPUT") == 0) { 1820 /* -i not valid with outgoing packets */ 1821 if (cs.options & OPT_VIANAMEIN) 1822 xtables_error(PARAMETER_PROBLEM, 1823 "Can't use -%c with %s\n", 1824 opt2char(OPT_VIANAMEIN), 1825 chain); 1826 } 1827 1828 if (cs.target && iptc_is_chain(cs.jumpto, *handle)) { 1829 fprintf(stderr, 1830 "Warning: using chain %s, not extension\n", 1831 cs.jumpto); 1832 1833 if (cs.target->t) 1834 free(cs.target->t); 1835 1836 cs.target = NULL; 1837 } 1838 1839 /* If they didn't specify a target, or it's a chain 1840 name, use standard. */ 1841 if (!cs.target 1842 && (strlen(cs.jumpto) == 0 1843 || iptc_is_chain(cs.jumpto, *handle))) { 1844 size_t size; 1845 1846 cs.target = xtables_find_target(XT_STANDARD_TARGET, 1847 XTF_LOAD_MUST_SUCCEED); 1848 1849 size = sizeof(struct xt_entry_target) 1850 + cs.target->size; 1851 cs.target->t = xtables_calloc(1, size); 1852 cs.target->t->u.target_size = size; 1853 strcpy(cs.target->t->u.user.name, cs.jumpto); 1854 if (!iptc_is_chain(cs.jumpto, *handle)) 1855 cs.target->t->u.user.revision = cs.target->revision; 1856 xs_init_target(cs.target); 1857 } 1858 1859 if (!cs.target) { 1860 /* it is no chain, and we can't load a plugin. 1861 * We cannot know if the plugin is corrupt, non 1862 * existant OR if the user just misspelled a 1863 * chain. */ 1864#ifdef IPT_F_GOTO 1865 if (cs.fw.ip.flags & IPT_F_GOTO) 1866 xtables_error(PARAMETER_PROBLEM, 1867 "goto '%s' is not a chain\n", 1868 cs.jumpto); 1869#endif 1870 xtables_find_target(cs.jumpto, XTF_LOAD_MUST_SUCCEED); 1871 } else { 1872 e = generate_entry(&cs.fw, cs.matches, cs.target->t); 1873 free(cs.target->t); 1874 } 1875 } 1876 1877 switch (command) { 1878 case CMD_APPEND: 1879 ret = append_entry(chain, e, 1880 nsaddrs, saddrs, smasks, 1881 ndaddrs, daddrs, dmasks, 1882 cs.options&OPT_VERBOSE, 1883 *handle); 1884 break; 1885 case CMD_DELETE: 1886 ret = delete_entry(chain, e, 1887 nsaddrs, saddrs, smasks, 1888 ndaddrs, daddrs, dmasks, 1889 cs.options&OPT_VERBOSE, 1890 *handle, cs.matches, cs.target); 1891 break; 1892 case CMD_DELETE_NUM: 1893 ret = iptc_delete_num_entry(chain, rulenum - 1, *handle); 1894 break; 1895 case CMD_CHECK: 1896 ret = check_entry(chain, e, 1897 nsaddrs, saddrs, smasks, 1898 ndaddrs, daddrs, dmasks, 1899 cs.options&OPT_VERBOSE, 1900 *handle, cs.matches, cs.target); 1901 break; 1902 case CMD_REPLACE: 1903 ret = replace_entry(chain, e, rulenum - 1, 1904 saddrs, smasks, daddrs, dmasks, 1905 cs.options&OPT_VERBOSE, *handle); 1906 break; 1907 case CMD_INSERT: 1908 ret = insert_entry(chain, e, rulenum - 1, 1909 nsaddrs, saddrs, smasks, 1910 ndaddrs, daddrs, dmasks, 1911 cs.options&OPT_VERBOSE, 1912 *handle); 1913 break; 1914 case CMD_FLUSH: 1915 ret = flush_entries4(chain, cs.options&OPT_VERBOSE, *handle); 1916 break; 1917 case CMD_ZERO: 1918 ret = zero_entries(chain, cs.options&OPT_VERBOSE, *handle); 1919 break; 1920 case CMD_ZERO_NUM: 1921 ret = iptc_zero_counter(chain, rulenum, *handle); 1922 break; 1923 case CMD_LIST: 1924 case CMD_LIST|CMD_ZERO: 1925 case CMD_LIST|CMD_ZERO_NUM: 1926 ret = list_entries(chain, 1927 rulenum, 1928 cs.options&OPT_VERBOSE, 1929 cs.options&OPT_NUMERIC, 1930 cs.options&OPT_EXPANDED, 1931 cs.options&OPT_LINENUMBERS, 1932 *handle); 1933 if (ret && (command & CMD_ZERO)) 1934 ret = zero_entries(chain, 1935 cs.options&OPT_VERBOSE, *handle); 1936 if (ret && (command & CMD_ZERO_NUM)) 1937 ret = iptc_zero_counter(chain, rulenum, *handle); 1938 break; 1939 case CMD_LIST_RULES: 1940 case CMD_LIST_RULES|CMD_ZERO: 1941 case CMD_LIST_RULES|CMD_ZERO_NUM: 1942 ret = list_rules(chain, 1943 rulenum, 1944 cs.options&OPT_VERBOSE, 1945 *handle); 1946 if (ret && (command & CMD_ZERO)) 1947 ret = zero_entries(chain, 1948 cs.options&OPT_VERBOSE, *handle); 1949 if (ret && (command & CMD_ZERO_NUM)) 1950 ret = iptc_zero_counter(chain, rulenum, *handle); 1951 break; 1952 case CMD_NEW_CHAIN: 1953 ret = iptc_create_chain(chain, *handle); 1954 break; 1955 case CMD_DELETE_CHAIN: 1956 ret = delete_chain4(chain, cs.options&OPT_VERBOSE, *handle); 1957 break; 1958 case CMD_RENAME_CHAIN: 1959 ret = iptc_rename_chain(chain, newname, *handle); 1960 break; 1961 case CMD_SET_POLICY: 1962 ret = iptc_set_policy(chain, policy, cs.options&OPT_COUNTERS ? &cs.fw.counters : NULL, *handle); 1963 break; 1964 default: 1965 /* We should never reach this... */ 1966 exit_tryhelp(2); 1967 } 1968 1969 if (verbose > 1) 1970 dump_entries(*handle); 1971 1972 clear_rule_matches(&cs.matches); 1973 1974 if (e != NULL) { 1975 free(e); 1976 e = NULL; 1977 } 1978 1979 free(saddrs); 1980 free(smasks); 1981 free(daddrs); 1982 free(dmasks); 1983 xtables_free_opts(1); 1984 1985 return ret; 1986} 1987