1 /* Code to take an ip6tables-style command line and do it. */ 2 3 /* 4 * Author: Paul.Russell (at) rustcorp.com.au and mneuling (at) radlogic.com.au 5 * 6 * (C) 2000-2002 by the netfilter coreteam <coreteam (at) netfilter.org>: 7 * Paul 'Rusty' Russell <rusty (at) rustcorp.com.au> 8 * Marc Boucher <marc+nf (at) mbsi.ca> 9 * James Morris <jmorris (at) intercode.com.au> 10 * Harald Welte <laforge (at) gnumonks.org> 11 * Jozsef Kadlecsik <kadlec (at) 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 <stdio.h> 33 #include <stdlib.h> 34 #include <ctype.h> 35 #include <stdarg.h> 36 #include <stdbool.h> 37 #include <limits.h> 38 #include <ip6tables.h> 39 #include <xtables.h> 40 #include <arpa/inet.h> 41 #include <unistd.h> 42 #include <fcntl.h> 43 #include <sys/types.h> 44 #include <sys/socket.h> 45 #include "ip6tables-multi.h" 46 #include "xshared.h" 47 48 #ifndef TRUE 49 #define TRUE 1 50 #endif 51 #ifndef FALSE 52 #define FALSE 0 53 #endif 54 55 #define FMT_NUMERIC 0x0001 56 #define FMT_NOCOUNTS 0x0002 57 #define FMT_KILOMEGAGIGA 0x0004 58 #define FMT_OPTIONS 0x0008 59 #define FMT_NOTABLE 0x0010 60 #define FMT_NOTARGET 0x0020 61 #define FMT_VIA 0x0040 62 #define FMT_NONEWLINE 0x0080 63 #define FMT_LINENUMBERS 0x0100 64 65 #define FMT_PRINT_RULE (FMT_NOCOUNTS | FMT_OPTIONS | FMT_VIA \ 66 | FMT_NUMERIC | FMT_NOTABLE) 67 #define FMT(tab,notab) ((format) & FMT_NOTABLE ? (notab) : (tab)) 68 69 70 #define CMD_NONE 0x0000U 71 #define CMD_INSERT 0x0001U 72 #define CMD_DELETE 0x0002U 73 #define CMD_DELETE_NUM 0x0004U 74 #define CMD_REPLACE 0x0008U 75 #define CMD_APPEND 0x0010U 76 #define CMD_LIST 0x0020U 77 #define CMD_FLUSH 0x0040U 78 #define CMD_ZERO 0x0080U 79 #define CMD_NEW_CHAIN 0x0100U 80 #define CMD_DELETE_CHAIN 0x0200U 81 #define CMD_SET_POLICY 0x0400U 82 #define CMD_RENAME_CHAIN 0x0800U 83 #define CMD_LIST_RULES 0x1000U 84 #define CMD_ZERO_NUM 0x2000U 85 #define CMD_CHECK 0x4000U 86 #define NUMBER_OF_CMD 16 87 static const char cmdflags[] = { 'I', 'D', 'D', 'R', 'A', 'L', 'F', 'Z', 88 'Z', 'N', 'X', 'P', 'E', 'S', 'C' }; 89 90 #define NUMBER_OF_OPT ARRAY_SIZE(optflags) 91 static const char optflags[] 92 = { 'n', 's', 'd', 'p', 'j', 'v', 'x', 'i', 'o', '0', 'c'}; 93 94 static struct option original_opts[] = { 95 {.name = "append", .has_arg = 1, .val = 'A'}, 96 {.name = "delete", .has_arg = 1, .val = 'D'}, 97 {.name = "check" , .has_arg = 1, .val = 'C'}, 98 {.name = "insert", .has_arg = 1, .val = 'I'}, 99 {.name = "replace", .has_arg = 1, .val = 'R'}, 100 {.name = "list", .has_arg = 2, .val = 'L'}, 101 {.name = "list-rules", .has_arg = 2, .val = 'S'}, 102 {.name = "flush", .has_arg = 2, .val = 'F'}, 103 {.name = "zero", .has_arg = 2, .val = 'Z'}, 104 {.name = "new-chain", .has_arg = 1, .val = 'N'}, 105 {.name = "delete-chain", .has_arg = 2, .val = 'X'}, 106 {.name = "rename-chain", .has_arg = 1, .val = 'E'}, 107 {.name = "policy", .has_arg = 1, .val = 'P'}, 108 {.name = "source", .has_arg = 1, .val = 's'}, 109 {.name = "destination", .has_arg = 1, .val = 'd'}, 110 {.name = "src", .has_arg = 1, .val = 's'}, /* synonym */ 111 {.name = "dst", .has_arg = 1, .val = 'd'}, /* synonym */ 112 {.name = "protocol", .has_arg = 1, .val = 'p'}, 113 {.name = "in-interface", .has_arg = 1, .val = 'i'}, 114 {.name = "jump", .has_arg = 1, .val = 'j'}, 115 {.name = "table", .has_arg = 1, .val = 't'}, 116 {.name = "match", .has_arg = 1, .val = 'm'}, 117 {.name = "numeric", .has_arg = 0, .val = 'n'}, 118 {.name = "out-interface", .has_arg = 1, .val = 'o'}, 119 {.name = "verbose", .has_arg = 0, .val = 'v'}, 120 {.name = "exact", .has_arg = 0, .val = 'x'}, 121 {.name = "version", .has_arg = 0, .val = 'V'}, 122 {.name = "help", .has_arg = 2, .val = 'h'}, 123 {.name = "line-numbers", .has_arg = 0, .val = '0'}, 124 {.name = "modprobe", .has_arg = 1, .val = 'M'}, 125 {.name = "set-counters", .has_arg = 1, .val = 'c'}, 126 {.name = "goto", .has_arg = 1, .val = 'g'}, 127 {.name = "ipv4", .has_arg = 0, .val = '4'}, 128 {.name = "ipv6", .has_arg = 0, .val = '6'}, 129 {NULL}, 130 }; 131 132 void ip6tables_exit_error(enum xtables_exittype status, const char *msg, ...) __attribute__((noreturn, format(printf,2,3))); 133 struct xtables_globals ip6tables_globals = { 134 .option_offset = 0, 135 .program_version = IPTABLES_VERSION, 136 .orig_opts = original_opts, 137 .exit_err = ip6tables_exit_error, 138 }; 139 140 /* Table of legal combinations of commands and options. If any of the 141 * given commands make an option legal, that option is legal (applies to 142 * CMD_LIST and CMD_ZERO only). 143 * Key: 144 * + compulsory 145 * x illegal 146 * optional 147 */ 148 149 static const char commands_v_options[NUMBER_OF_CMD][NUMBER_OF_OPT] = 150 /* Well, it's better than "Re: Linux vs FreeBSD" */ 151 { 152 /* -n -s -d -p -j -v -x -i -o --line -c */ 153 /*INSERT*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x',' '}, 154 /*DELETE*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x','x'}, 155 /*DELETE_NUM*/{'x','x','x','x','x',' ','x','x','x','x','x'}, 156 /*REPLACE*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x',' '}, 157 /*APPEND*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x',' '}, 158 /*LIST*/ {' ','x','x','x','x',' ',' ','x','x',' ','x'}, 159 /*FLUSH*/ {'x','x','x','x','x',' ','x','x','x','x','x'}, 160 /*ZERO*/ {'x','x','x','x','x',' ','x','x','x','x','x'}, 161 /*ZERO_NUM*/ {'x','x','x','x','x',' ','x','x','x','x','x'}, 162 /*NEW_CHAIN*/ {'x','x','x','x','x',' ','x','x','x','x','x'}, 163 /*DEL_CHAIN*/ {'x','x','x','x','x',' ','x','x','x','x','x'}, 164 /*SET_POLICY*/{'x','x','x','x','x',' ','x','x','x','x',' '}, 165 /*RENAME*/ {'x','x','x','x','x',' ','x','x','x','x','x'}, 166 /*LIST_RULES*/{'x','x','x','x','x',' ','x','x','x','x','x'}, 167 /*CHECK*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x','x'}, 168 }; 169 170 static const unsigned int inverse_for_options[NUMBER_OF_OPT] = 171 { 172 /* -n */ 0, 173 /* -s */ IP6T_INV_SRCIP, 174 /* -d */ IP6T_INV_DSTIP, 175 /* -p */ IP6T_INV_PROTO, 176 /* -j */ 0, 177 /* -v */ 0, 178 /* -x */ 0, 179 /* -i */ IP6T_INV_VIA_IN, 180 /* -o */ IP6T_INV_VIA_OUT, 181 /*--line*/ 0, 182 /* -c */ 0, 183 }; 184 185 #define opts ip6tables_globals.opts 186 #define prog_name ip6tables_globals.program_name 187 #define prog_vers ip6tables_globals.program_version 188 /* A few hardcoded protocols for 'all' and in case the user has no 189 /etc/protocols */ 190 struct pprot { 191 const char *name; 192 uint8_t num; 193 }; 194 195 static void __attribute__((noreturn)) 196 exit_tryhelp(int status) 197 { 198 if (line != -1) 199 fprintf(stderr, "Error occurred at line: %d\n", line); 200 fprintf(stderr, "Try `%s -h' or '%s --help' for more information.\n", 201 prog_name, prog_name); 202 xtables_free_opts(1); 203 exit(status); 204 } 205 206 static void 207 exit_printhelp(const struct xtables_rule_match *matches) 208 { 209 printf("%s v%s\n\n" 210 "Usage: %s -[ACD] chain rule-specification [options]\n" 211 " %s -I chain [rulenum] rule-specification [options]\n" 212 " %s -R chain rulenum rule-specification [options]\n" 213 " %s -D chain rulenum [options]\n" 214 " %s -[LS] [chain [rulenum]] [options]\n" 215 " %s -[FZ] [chain] [options]\n" 216 " %s -[NX] chain\n" 217 " %s -E old-chain-name new-chain-name\n" 218 " %s -P chain target [options]\n" 219 " %s -h (print this help information)\n\n", 220 prog_name, prog_vers, prog_name, prog_name, 221 prog_name, prog_name, prog_name, prog_name, 222 prog_name, prog_name, prog_name, prog_name); 223 224 printf( 225 "Commands:\n" 226 "Either long or short options are allowed.\n" 227 " --append -A chain Append to chain\n" 228 " --check -C chain Check for the existence of a rule\n" 229 " --delete -D chain Delete matching rule from chain\n" 230 " --delete -D chain rulenum\n" 231 " Delete rule rulenum (1 = first) from chain\n" 232 " --insert -I chain [rulenum]\n" 233 " Insert in chain as rulenum (default 1=first)\n" 234 " --replace -R chain rulenum\n" 235 " Replace rule rulenum (1 = first) in chain\n" 236 " --list -L [chain [rulenum]]\n" 237 " List the rules in a chain or all chains\n" 238 " --list-rules -S [chain [rulenum]]\n" 239 " Print the rules in a chain or all chains\n" 240 " --flush -F [chain] Delete all rules in chain or all chains\n" 241 " --zero -Z [chain [rulenum]]\n" 242 " Zero counters in chain or all chains\n" 243 " --new -N chain Create a new user-defined chain\n" 244 " --delete-chain\n" 245 " -X [chain] Delete a user-defined chain\n" 246 " --policy -P chain target\n" 247 " Change policy on chain to target\n" 248 " --rename-chain\n" 249 " -E old-chain new-chain\n" 250 " Change chain name, (moving any references)\n" 251 252 "Options:\n" 253 " --ipv4 -4 Error (line is ignored by ip6tables-restore)\n" 254 " --ipv6 -6 Nothing (line is ignored by iptables-restore)\n" 255 "[!] --proto -p proto protocol: by number or name, eg. `tcp'\n" 256 "[!] --source -s address[/mask][,...]\n" 257 " source specification\n" 258 "[!] --destination -d address[/mask][,...]\n" 259 " destination specification\n" 260 "[!] --in-interface -i input name[+]\n" 261 " network interface name ([+] for wildcard)\n" 262 " --jump -j target\n" 263 " target for rule (may load target extension)\n" 264 #ifdef IP6T_F_GOTO 265 " --goto -g chain\n" 266 " jump to chain with no return\n" 267 #endif 268 " --match -m match\n" 269 " extended match (may load extension)\n" 270 " --numeric -n numeric output of addresses and ports\n" 271 "[!] --out-interface -o output name[+]\n" 272 " network interface name ([+] for wildcard)\n" 273 " --table -t table table to manipulate (default: `filter')\n" 274 " --verbose -v verbose mode\n" 275 " --line-numbers print line numbers when listing\n" 276 " --exact -x expand numbers (display exact values)\n" 277 /*"[!] --fragment -f match second or further fragments only\n"*/ 278 " --modprobe=<command> try to insert modules using this command\n" 279 " --set-counters PKTS BYTES set the counter during insert/append\n" 280 "[!] --version -V print package version.\n"); 281 282 print_extension_helps(xtables_targets, matches); 283 exit(0); 284 } 285 286 void 287 ip6tables_exit_error(enum xtables_exittype status, const char *msg, ...) 288 { 289 va_list args; 290 291 va_start(args, msg); 292 fprintf(stderr, "%s v%s: ", prog_name, prog_vers); 293 vfprintf(stderr, msg, args); 294 va_end(args); 295 fprintf(stderr, "\n"); 296 if (status == PARAMETER_PROBLEM) 297 exit_tryhelp(status); 298 if (status == VERSION_PROBLEM) 299 fprintf(stderr, 300 "Perhaps ip6tables or your kernel needs to be upgraded.\n"); 301 /* On error paths, make sure that we don't leak memory */ 302 xtables_free_opts(1); 303 exit(status); 304 } 305 306 static void 307 generic_opt_check(int command, int options) 308 { 309 int i, j, legal = 0; 310 311 /* Check that commands are valid with options. Complicated by the 312 * fact that if an option is legal with *any* command given, it is 313 * legal overall (ie. -z and -l). 314 */ 315 for (i = 0; i < NUMBER_OF_OPT; i++) { 316 legal = 0; /* -1 => illegal, 1 => legal, 0 => undecided. */ 317 318 for (j = 0; j < NUMBER_OF_CMD; j++) { 319 if (!(command & (1<<j))) 320 continue; 321 322 if (!(options & (1<<i))) { 323 if (commands_v_options[j][i] == '+') 324 xtables_error(PARAMETER_PROBLEM, 325 "You need to supply the `-%c' " 326 "option for this command\n", 327 optflags[i]); 328 } else { 329 if (commands_v_options[j][i] != 'x') 330 legal = 1; 331 else if (legal == 0) 332 legal = -1; 333 } 334 } 335 if (legal == -1) 336 xtables_error(PARAMETER_PROBLEM, 337 "Illegal option `-%c' with this command\n", 338 optflags[i]); 339 } 340 } 341 342 static char 343 opt2char(int option) 344 { 345 const char *ptr; 346 for (ptr = optflags; option > 1; option >>= 1, ptr++); 347 348 return *ptr; 349 } 350 351 static char 352 cmd2char(int option) 353 { 354 const char *ptr; 355 for (ptr = cmdflags; option > 1; option >>= 1, ptr++); 356 357 return *ptr; 358 } 359 360 static void 361 add_command(unsigned int *cmd, const int newcmd, const int othercmds, 362 int invert) 363 { 364 if (invert) 365 xtables_error(PARAMETER_PROBLEM, "unexpected '!' flag"); 366 if (*cmd & (~othercmds)) 367 xtables_error(PARAMETER_PROBLEM, "Cannot use -%c with -%c\n", 368 cmd2char(newcmd), cmd2char(*cmd & (~othercmds))); 369 *cmd |= newcmd; 370 } 371 372 /* 373 * All functions starting with "parse" should succeed, otherwise 374 * the program fails. 375 * Most routines return pointers to static data that may change 376 * between calls to the same or other routines with a few exceptions: 377 * "host_to_addr", "parse_hostnetwork", and "parse_hostnetworkmask" 378 * return global static data. 379 */ 380 381 /* These are invalid numbers as upper layer protocol */ 382 static int is_exthdr(uint16_t proto) 383 { 384 return (proto == IPPROTO_ROUTING || 385 proto == IPPROTO_FRAGMENT || 386 proto == IPPROTO_AH || 387 proto == IPPROTO_DSTOPTS); 388 } 389 390 /* Can't be zero. */ 391 static int 392 parse_rulenumber(const char *rule) 393 { 394 unsigned int rulenum; 395 396 if (!xtables_strtoui(rule, NULL, &rulenum, 1, INT_MAX)) 397 xtables_error(PARAMETER_PROBLEM, 398 "Invalid rule number `%s'", rule); 399 400 return rulenum; 401 } 402 403 static const char * 404 parse_target(const char *targetname) 405 { 406 const char *ptr; 407 408 if (strlen(targetname) < 1) 409 xtables_error(PARAMETER_PROBLEM, 410 "Invalid target name (too short)"); 411 412 if (strlen(targetname) >= XT_EXTENSION_MAXNAMELEN) 413 xtables_error(PARAMETER_PROBLEM, 414 "Invalid target name `%s' (%u chars max)", 415 targetname, XT_EXTENSION_MAXNAMELEN - 1); 416 417 for (ptr = targetname; *ptr; ptr++) 418 if (isspace(*ptr)) 419 xtables_error(PARAMETER_PROBLEM, 420 "Invalid target name `%s'", targetname); 421 return targetname; 422 } 423 424 static void 425 set_option(unsigned int *options, unsigned int option, uint8_t *invflg, 426 int invert) 427 { 428 if (*options & option) 429 xtables_error(PARAMETER_PROBLEM, "multiple -%c flags not allowed", 430 opt2char(option)); 431 *options |= option; 432 433 if (invert) { 434 unsigned int i; 435 for (i = 0; 1 << i != option; i++); 436 437 if (!inverse_for_options[i]) 438 xtables_error(PARAMETER_PROBLEM, 439 "cannot have ! before -%c", 440 opt2char(option)); 441 *invflg |= inverse_for_options[i]; 442 } 443 } 444 445 static void 446 print_num(uint64_t number, unsigned int format) 447 { 448 if (format & FMT_KILOMEGAGIGA) { 449 if (number > 99999) { 450 number = (number + 500) / 1000; 451 if (number > 9999) { 452 number = (number + 500) / 1000; 453 if (number > 9999) { 454 number = (number + 500) / 1000; 455 if (number > 9999) { 456 number = (number + 500) / 1000; 457 printf(FMT("%4lluT ","%lluT "), (unsigned long long)number); 458 } 459 else printf(FMT("%4lluG ","%lluG "), (unsigned long long)number); 460 } 461 else printf(FMT("%4lluM ","%lluM "), (unsigned long long)number); 462 } else 463 printf(FMT("%4lluK ","%lluK "), (unsigned long long)number); 464 } else 465 printf(FMT("%5llu ","%llu "), (unsigned long long)number); 466 } else 467 printf(FMT("%8llu ","%llu "), (unsigned long long)number); 468 } 469 470 471 static void 472 print_header(unsigned int format, const char *chain, struct ip6tc_handle *handle) 473 { 474 struct ip6t_counters counters; 475 const char *pol = ip6tc_get_policy(chain, &counters, handle); 476 printf("Chain %s", chain); 477 if (pol) { 478 printf(" (policy %s", pol); 479 if (!(format & FMT_NOCOUNTS)) { 480 fputc(' ', stdout); 481 print_num(counters.pcnt, (format|FMT_NOTABLE)); 482 fputs("packets, ", stdout); 483 print_num(counters.bcnt, (format|FMT_NOTABLE)); 484 fputs("bytes", stdout); 485 } 486 printf(")\n"); 487 } else { 488 unsigned int refs; 489 if (!ip6tc_get_references(&refs, chain, handle)) 490 printf(" (ERROR obtaining refs)\n"); 491 else 492 printf(" (%u references)\n", refs); 493 } 494 495 if (format & FMT_LINENUMBERS) 496 printf(FMT("%-4s ", "%s "), "num"); 497 if (!(format & FMT_NOCOUNTS)) { 498 if (format & FMT_KILOMEGAGIGA) { 499 printf(FMT("%5s ","%s "), "pkts"); 500 printf(FMT("%5s ","%s "), "bytes"); 501 } else { 502 printf(FMT("%8s ","%s "), "pkts"); 503 printf(FMT("%10s ","%s "), "bytes"); 504 } 505 } 506 if (!(format & FMT_NOTARGET)) 507 printf(FMT("%-9s ","%s "), "target"); 508 fputs(" prot ", stdout); 509 if (format & FMT_OPTIONS) 510 fputs("opt", stdout); 511 if (format & FMT_VIA) { 512 printf(FMT(" %-6s ","%s "), "in"); 513 printf(FMT("%-6s ","%s "), "out"); 514 } 515 printf(FMT(" %-19s ","%s "), "source"); 516 printf(FMT(" %-19s "," %s "), "destination"); 517 printf("\n"); 518 } 519 520 521 static int 522 print_match(const struct ip6t_entry_match *m, 523 const struct ip6t_ip6 *ip, 524 int numeric) 525 { 526 const struct xtables_match *match = 527 xtables_find_match(m->u.user.name, XTF_TRY_LOAD, NULL); 528 529 if (match) { 530 if (match->print) 531 match->print(ip, m, numeric); 532 else 533 printf("%s ", match->name); 534 } else { 535 if (m->u.user.name[0]) 536 printf("UNKNOWN match `%s' ", m->u.user.name); 537 } 538 /* Don't stop iterating. */ 539 return 0; 540 } 541 542 /* e is called `fw' here for historical reasons */ 543 static void 544 print_firewall(const struct ip6t_entry *fw, 545 const char *targname, 546 unsigned int num, 547 unsigned int format, 548 struct ip6tc_handle *const handle) 549 { 550 const struct xtables_target *target = NULL; 551 const struct ip6t_entry_target *t; 552 char buf[BUFSIZ]; 553 554 if (!ip6tc_is_chain(targname, handle)) 555 target = xtables_find_target(targname, XTF_TRY_LOAD); 556 else 557 target = xtables_find_target(IP6T_STANDARD_TARGET, 558 XTF_LOAD_MUST_SUCCEED); 559 560 t = ip6t_get_target((struct ip6t_entry *)fw); 561 562 if (format & FMT_LINENUMBERS) 563 printf(FMT("%-4u ", "%u "), num); 564 565 if (!(format & FMT_NOCOUNTS)) { 566 print_num(fw->counters.pcnt, format); 567 print_num(fw->counters.bcnt, format); 568 } 569 570 if (!(format & FMT_NOTARGET)) 571 printf(FMT("%-9s ", "%s "), targname); 572 573 fputc(fw->ipv6.invflags & IP6T_INV_PROTO ? '!' : ' ', stdout); 574 { 575 const char *pname = proto_to_name(fw->ipv6.proto, format&FMT_NUMERIC); 576 if (pname) 577 printf(FMT("%-5s", "%s "), pname); 578 else 579 printf(FMT("%-5hu", "%hu "), fw->ipv6.proto); 580 } 581 582 if (format & FMT_OPTIONS) { 583 if (format & FMT_NOTABLE) 584 fputs("opt ", stdout); 585 fputc(' ', stdout); /* Invert flag of FRAG */ 586 fputc(' ', stdout); /* -f */ 587 fputc(' ', stdout); 588 } 589 590 if (format & FMT_VIA) { 591 char iface[IFNAMSIZ+2]; 592 593 if (fw->ipv6.invflags & IP6T_INV_VIA_IN) { 594 iface[0] = '!'; 595 iface[1] = '\0'; 596 } 597 else iface[0] = '\0'; 598 599 if (fw->ipv6.iniface[0] != '\0') { 600 strcat(iface, fw->ipv6.iniface); 601 } 602 else if (format & FMT_NUMERIC) strcat(iface, "*"); 603 else strcat(iface, "any"); 604 printf(FMT(" %-6s ","in %s "), iface); 605 606 if (fw->ipv6.invflags & IP6T_INV_VIA_OUT) { 607 iface[0] = '!'; 608 iface[1] = '\0'; 609 } 610 else iface[0] = '\0'; 611 612 if (fw->ipv6.outiface[0] != '\0') { 613 strcat(iface, fw->ipv6.outiface); 614 } 615 else if (format & FMT_NUMERIC) strcat(iface, "*"); 616 else strcat(iface, "any"); 617 printf(FMT("%-6s ","out %s "), iface); 618 } 619 620 fputc(fw->ipv6.invflags & IP6T_INV_SRCIP ? '!' : ' ', stdout); 621 if (!memcmp(&fw->ipv6.smsk, &in6addr_any, sizeof in6addr_any) 622 && !(format & FMT_NUMERIC)) 623 printf(FMT("%-19s ","%s "), "anywhere"); 624 else { 625 if (format & FMT_NUMERIC) 626 strcpy(buf, xtables_ip6addr_to_numeric(&fw->ipv6.src)); 627 else 628 strcpy(buf, xtables_ip6addr_to_anyname(&fw->ipv6.src)); 629 strcat(buf, xtables_ip6mask_to_numeric(&fw->ipv6.smsk)); 630 printf(FMT("%-19s ","%s "), buf); 631 } 632 633 fputc(fw->ipv6.invflags & IP6T_INV_DSTIP ? '!' : ' ', stdout); 634 if (!memcmp(&fw->ipv6.dmsk, &in6addr_any, sizeof in6addr_any) 635 && !(format & FMT_NUMERIC)) 636 printf(FMT("%-19s ","-> %s"), "anywhere"); 637 else { 638 if (format & FMT_NUMERIC) 639 strcpy(buf, xtables_ip6addr_to_numeric(&fw->ipv6.dst)); 640 else 641 strcpy(buf, xtables_ip6addr_to_anyname(&fw->ipv6.dst)); 642 strcat(buf, xtables_ip6mask_to_numeric(&fw->ipv6.dmsk)); 643 printf(FMT("%-19s ","-> %s"), buf); 644 } 645 646 if (format & FMT_NOTABLE) 647 fputs(" ", stdout); 648 649 #ifdef IP6T_F_GOTO 650 if(fw->ipv6.flags & IP6T_F_GOTO) 651 printf("[goto] "); 652 #endif 653 654 IP6T_MATCH_ITERATE(fw, print_match, &fw->ipv6, format & FMT_NUMERIC); 655 656 if (target) { 657 if (target->print) 658 /* Print the target information. */ 659 target->print(&fw->ipv6, t, format & FMT_NUMERIC); 660 } else if (t->u.target_size != sizeof(*t)) 661 printf("[%u bytes of unknown target data] ", 662 (unsigned int)(t->u.target_size - sizeof(*t))); 663 664 if (!(format & FMT_NONEWLINE)) 665 fputc('\n', stdout); 666 } 667 668 static void 669 print_firewall_line(const struct ip6t_entry *fw, 670 struct ip6tc_handle *const h) 671 { 672 struct ip6t_entry_target *t; 673 674 t = ip6t_get_target((struct ip6t_entry *)fw); 675 print_firewall(fw, t->u.user.name, 0, FMT_PRINT_RULE, h); 676 } 677 678 static int 679 append_entry(const ip6t_chainlabel chain, 680 struct ip6t_entry *fw, 681 unsigned int nsaddrs, 682 const struct in6_addr saddrs[], 683 const struct in6_addr smasks[], 684 unsigned int ndaddrs, 685 const struct in6_addr daddrs[], 686 const struct in6_addr dmasks[], 687 int verbose, 688 struct ip6tc_handle *handle) 689 { 690 unsigned int i, j; 691 int ret = 1; 692 693 for (i = 0; i < nsaddrs; i++) { 694 fw->ipv6.src = saddrs[i]; 695 fw->ipv6.smsk = smasks[i]; 696 for (j = 0; j < ndaddrs; j++) { 697 fw->ipv6.dst = daddrs[j]; 698 fw->ipv6.dmsk = dmasks[j]; 699 if (verbose) 700 print_firewall_line(fw, handle); 701 ret &= ip6tc_append_entry(chain, fw, handle); 702 } 703 } 704 705 return ret; 706 } 707 708 static int 709 replace_entry(const ip6t_chainlabel chain, 710 struct ip6t_entry *fw, 711 unsigned int rulenum, 712 const struct in6_addr *saddr, const struct in6_addr *smask, 713 const struct in6_addr *daddr, const struct in6_addr *dmask, 714 int verbose, 715 struct ip6tc_handle *handle) 716 { 717 fw->ipv6.src = *saddr; 718 fw->ipv6.dst = *daddr; 719 fw->ipv6.smsk = *smask; 720 fw->ipv6.dmsk = *dmask; 721 722 if (verbose) 723 print_firewall_line(fw, handle); 724 return ip6tc_replace_entry(chain, fw, rulenum, handle); 725 } 726 727 static int 728 insert_entry(const ip6t_chainlabel chain, 729 struct ip6t_entry *fw, 730 unsigned int rulenum, 731 unsigned int nsaddrs, 732 const struct in6_addr saddrs[], 733 const struct in6_addr smasks[], 734 unsigned int ndaddrs, 735 const struct in6_addr daddrs[], 736 const struct in6_addr dmasks[], 737 int verbose, 738 struct ip6tc_handle *handle) 739 { 740 unsigned int i, j; 741 int ret = 1; 742 743 for (i = 0; i < nsaddrs; i++) { 744 fw->ipv6.src = saddrs[i]; 745 fw->ipv6.smsk = smasks[i]; 746 for (j = 0; j < ndaddrs; j++) { 747 fw->ipv6.dst = daddrs[j]; 748 fw->ipv6.dmsk = dmasks[j]; 749 if (verbose) 750 print_firewall_line(fw, handle); 751 ret &= ip6tc_insert_entry(chain, fw, rulenum, handle); 752 } 753 } 754 755 return ret; 756 } 757 758 static unsigned char * 759 make_delete_mask(const struct xtables_rule_match *matches, 760 const struct xtables_target *target) 761 { 762 /* Establish mask for comparison */ 763 unsigned int size; 764 const struct xtables_rule_match *matchp; 765 unsigned char *mask, *mptr; 766 767 size = sizeof(struct ip6t_entry); 768 for (matchp = matches; matchp; matchp = matchp->next) 769 size += XT_ALIGN(sizeof(struct ip6t_entry_match)) + matchp->match->size; 770 771 mask = xtables_calloc(1, size 772 + XT_ALIGN(sizeof(struct ip6t_entry_target)) 773 + target->size); 774 775 memset(mask, 0xFF, sizeof(struct ip6t_entry)); 776 mptr = mask + sizeof(struct ip6t_entry); 777 778 for (matchp = matches; matchp; matchp = matchp->next) { 779 memset(mptr, 0xFF, 780 XT_ALIGN(sizeof(struct ip6t_entry_match)) 781 + matchp->match->userspacesize); 782 mptr += XT_ALIGN(sizeof(struct ip6t_entry_match)) + matchp->match->size; 783 } 784 785 memset(mptr, 0xFF, 786 XT_ALIGN(sizeof(struct ip6t_entry_target)) 787 + target->userspacesize); 788 789 return mask; 790 } 791 792 static int 793 delete_entry(const ip6t_chainlabel chain, 794 struct ip6t_entry *fw, 795 unsigned int nsaddrs, 796 const struct in6_addr saddrs[], 797 const struct in6_addr smasks[], 798 unsigned int ndaddrs, 799 const struct in6_addr daddrs[], 800 const struct in6_addr dmasks[], 801 int verbose, 802 struct ip6tc_handle *handle, 803 struct xtables_rule_match *matches, 804 const struct xtables_target *target) 805 { 806 unsigned int i, j; 807 int ret = 1; 808 unsigned char *mask; 809 810 mask = make_delete_mask(matches, target); 811 for (i = 0; i < nsaddrs; i++) { 812 fw->ipv6.src = saddrs[i]; 813 fw->ipv6.smsk = smasks[i]; 814 for (j = 0; j < ndaddrs; j++) { 815 fw->ipv6.dst = daddrs[j]; 816 fw->ipv6.dmsk = dmasks[j]; 817 if (verbose) 818 print_firewall_line(fw, handle); 819 ret &= ip6tc_delete_entry(chain, fw, mask, handle); 820 } 821 } 822 free(mask); 823 824 return ret; 825 } 826 827 static int 828 check_entry(const ip6t_chainlabel chain, struct ip6t_entry *fw, 829 unsigned int nsaddrs, const struct in6_addr *saddrs, 830 const struct in6_addr *smasks, unsigned int ndaddrs, 831 const struct in6_addr *daddrs, const struct in6_addr *dmasks, 832 bool verbose, struct ip6tc_handle *handle, 833 struct xtables_rule_match *matches, 834 const struct xtables_target *target) 835 { 836 unsigned int i, j; 837 int ret = 1; 838 unsigned char *mask; 839 840 mask = make_delete_mask(matches, target); 841 for (i = 0; i < nsaddrs; i++) { 842 fw->ipv6.src = saddrs[i]; 843 fw->ipv6.smsk = smasks[i]; 844 for (j = 0; j < ndaddrs; j++) { 845 fw->ipv6.dst = daddrs[j]; 846 fw->ipv6.dmsk = dmasks[j]; 847 if (verbose) 848 print_firewall_line(fw, handle); 849 ret &= ip6tc_check_entry(chain, fw, mask, handle); 850 } 851 } 852 853 free(mask); 854 return ret; 855 } 856 857 int 858 for_each_chain6(int (*fn)(const ip6t_chainlabel, int, struct ip6tc_handle *), 859 int verbose, int builtinstoo, struct ip6tc_handle *handle) 860 { 861 int ret = 1; 862 const char *chain; 863 char *chains; 864 unsigned int i, chaincount = 0; 865 866 chain = ip6tc_first_chain(handle); 867 while (chain) { 868 chaincount++; 869 chain = ip6tc_next_chain(handle); 870 } 871 872 chains = xtables_malloc(sizeof(ip6t_chainlabel) * chaincount); 873 i = 0; 874 chain = ip6tc_first_chain(handle); 875 while (chain) { 876 strcpy(chains + i*sizeof(ip6t_chainlabel), chain); 877 i++; 878 chain = ip6tc_next_chain(handle); 879 } 880 881 for (i = 0; i < chaincount; i++) { 882 if (!builtinstoo 883 && ip6tc_builtin(chains + i*sizeof(ip6t_chainlabel), 884 handle) == 1) 885 continue; 886 ret &= fn(chains + i*sizeof(ip6t_chainlabel), verbose, handle); 887 } 888 889 free(chains); 890 return ret; 891 } 892 893 int 894 flush_entries6(const ip6t_chainlabel chain, int verbose, 895 struct ip6tc_handle *handle) 896 { 897 if (!chain) 898 return for_each_chain6(flush_entries6, verbose, 1, handle); 899 900 if (verbose) 901 fprintf(stdout, "Flushing chain `%s'\n", chain); 902 return ip6tc_flush_entries(chain, handle); 903 } 904 905 static int 906 zero_entries(const ip6t_chainlabel chain, int verbose, 907 struct ip6tc_handle *handle) 908 { 909 if (!chain) 910 return for_each_chain6(zero_entries, verbose, 1, handle); 911 912 if (verbose) 913 fprintf(stdout, "Zeroing chain `%s'\n", chain); 914 return ip6tc_zero_entries(chain, handle); 915 } 916 917 int 918 delete_chain6(const ip6t_chainlabel chain, int verbose, 919 struct ip6tc_handle *handle) 920 { 921 if (!chain) 922 return for_each_chain6(delete_chain6, verbose, 0, handle); 923 924 if (verbose) 925 fprintf(stdout, "Deleting chain `%s'\n", chain); 926 return ip6tc_delete_chain(chain, handle); 927 } 928 929 static int 930 list_entries(const ip6t_chainlabel chain, int rulenum, int verbose, int numeric, 931 int expanded, int linenumbers, struct ip6tc_handle *handle) 932 { 933 int found = 0; 934 unsigned int format; 935 const char *this; 936 937 format = FMT_OPTIONS; 938 if (!verbose) 939 format |= FMT_NOCOUNTS; 940 else 941 format |= FMT_VIA; 942 943 if (numeric) 944 format |= FMT_NUMERIC; 945 946 if (!expanded) 947 format |= FMT_KILOMEGAGIGA; 948 949 if (linenumbers) 950 format |= FMT_LINENUMBERS; 951 952 for (this = ip6tc_first_chain(handle); 953 this; 954 this = ip6tc_next_chain(handle)) { 955 const struct ip6t_entry *i; 956 unsigned int num; 957 958 if (chain && strcmp(chain, this) != 0) 959 continue; 960 961 if (found) printf("\n"); 962 963 if (!rulenum) 964 print_header(format, this, handle); 965 i = ip6tc_first_rule(this, handle); 966 967 num = 0; 968 while (i) { 969 num++; 970 if (!rulenum || num == rulenum) 971 print_firewall(i, 972 ip6tc_get_target(i, handle), 973 num, 974 format, 975 handle); 976 i = ip6tc_next_rule(i, handle); 977 } 978 found = 1; 979 } 980 981 errno = ENOENT; 982 return found; 983 } 984 985 /* This assumes that mask is contiguous, and byte-bounded. */ 986 static void 987 print_iface(char letter, const char *iface, const unsigned char *mask, 988 int invert) 989 { 990 unsigned int i; 991 992 if (mask[0] == 0) 993 return; 994 995 printf("%s -%c ", invert ? " !" : "", letter); 996 997 for (i = 0; i < IFNAMSIZ; i++) { 998 if (mask[i] != 0) { 999 if (iface[i] != '\0') 1000 printf("%c", iface[i]); 1001 } else { 1002 /* we can access iface[i-1] here, because 1003 * a few lines above we make sure that mask[0] != 0 */ 1004 if (iface[i-1] != '\0') 1005 printf("+"); 1006 break; 1007 } 1008 } 1009 } 1010 1011 /* The ip6tables looks up the /etc/protocols. */ 1012 static void print_proto(uint16_t proto, int invert) 1013 { 1014 if (proto) { 1015 unsigned int i; 1016 const char *invertstr = invert ? " !" : ""; 1017 1018 const struct protoent *pent = getprotobynumber(proto); 1019 if (pent) { 1020 printf("%s -p %s", 1021 invertstr, pent->p_name); 1022 return; 1023 } 1024 1025 for (i = 0; xtables_chain_protos[i].name != NULL; ++i) 1026 if (xtables_chain_protos[i].num == proto) { 1027 printf("%s -p %s", 1028 invertstr, xtables_chain_protos[i].name); 1029 return; 1030 } 1031 1032 printf("%s -p %u", invertstr, proto); 1033 } 1034 } 1035 1036 static int print_match_save(const struct ip6t_entry_match *e, 1037 const struct ip6t_ip6 *ip) 1038 { 1039 const struct xtables_match *match = 1040 xtables_find_match(e->u.user.name, XTF_TRY_LOAD, NULL); 1041 1042 if (match) { 1043 printf(" -m %s", e->u.user.name); 1044 1045 /* some matches don't provide a save function */ 1046 if (match->save) 1047 match->save(ip, e); 1048 } else { 1049 if (e->u.match_size) { 1050 fprintf(stderr, 1051 "Can't find library for match `%s'\n", 1052 e->u.user.name); 1053 exit(1); 1054 } 1055 } 1056 return 0; 1057 } 1058 1059 /* print a given ip including mask if neccessary */ 1060 static void print_ip(const char *prefix, const struct in6_addr *ip, 1061 const struct in6_addr *mask, int invert) 1062 { 1063 char buf[51]; 1064 int l = ipv6_prefix_length(mask); 1065 1066 if (l == 0 && !invert) 1067 return; 1068 1069 printf("%s %s %s", 1070 invert ? " !" : "", 1071 prefix, 1072 inet_ntop(AF_INET6, ip, buf, sizeof buf)); 1073 1074 if (l == -1) 1075 printf("/%s", inet_ntop(AF_INET6, mask, buf, sizeof buf)); 1076 else 1077 printf("/%d", l); 1078 } 1079 1080 /* We want this to be readable, so only print out neccessary fields. 1081 * Because that's the kind of world I want to live in. */ 1082 void print_rule6(const struct ip6t_entry *e, 1083 struct ip6tc_handle *h, const char *chain, int counters) 1084 { 1085 const struct ip6t_entry_target *t; 1086 const char *target_name; 1087 1088 /* print counters for iptables-save */ 1089 if (counters > 0) 1090 printf("[%llu:%llu] ", (unsigned long long)e->counters.pcnt, (unsigned long long)e->counters.bcnt); 1091 1092 /* print chain name */ 1093 printf("-A %s", chain); 1094 1095 /* Print IP part. */ 1096 print_ip("-s", &(e->ipv6.src), &(e->ipv6.smsk), 1097 e->ipv6.invflags & IP6T_INV_SRCIP); 1098 1099 print_ip("-d", &(e->ipv6.dst), &(e->ipv6.dmsk), 1100 e->ipv6.invflags & IP6T_INV_DSTIP); 1101 1102 print_iface('i', e->ipv6.iniface, e->ipv6.iniface_mask, 1103 e->ipv6.invflags & IP6T_INV_VIA_IN); 1104 1105 print_iface('o', e->ipv6.outiface, e->ipv6.outiface_mask, 1106 e->ipv6.invflags & IP6T_INV_VIA_OUT); 1107 1108 print_proto(e->ipv6.proto, e->ipv6.invflags & IP6T_INV_PROTO); 1109 1110 #if 0 1111 /* not definied in ipv6 1112 * FIXME: linux/netfilter_ipv6/ip6_tables: IP6T_INV_FRAG why definied? */ 1113 if (e->ipv6.flags & IPT_F_FRAG) 1114 printf("%s -f", 1115 e->ipv6.invflags & IP6T_INV_FRAG ? " !" : ""); 1116 #endif 1117 1118 if (e->ipv6.flags & IP6T_F_TOS) 1119 printf("%s -? %d", 1120 e->ipv6.invflags & IP6T_INV_TOS ? " !" : "", 1121 e->ipv6.tos); 1122 1123 /* Print matchinfo part */ 1124 if (e->target_offset) { 1125 IP6T_MATCH_ITERATE(e, print_match_save, &e->ipv6); 1126 } 1127 1128 /* print counters for iptables -R */ 1129 if (counters < 0) 1130 printf(" -c %llu %llu", (unsigned long long)e->counters.pcnt, (unsigned long long)e->counters.bcnt); 1131 1132 /* Print target name */ 1133 target_name = ip6tc_get_target(e, h); 1134 if (target_name && (*target_name != '\0')) 1135 #ifdef IP6T_F_GOTO 1136 printf(" -%c %s", e->ipv6.flags & IP6T_F_GOTO ? 'g' : 'j', target_name); 1137 #else 1138 printf(" -j %s", target_name); 1139 #endif 1140 1141 /* Print targinfo part */ 1142 t = ip6t_get_target((struct ip6t_entry *)e); 1143 if (t->u.user.name[0]) { 1144 struct xtables_target *target = 1145 xtables_find_target(t->u.user.name, XTF_TRY_LOAD); 1146 1147 if (!target) { 1148 fprintf(stderr, "Can't find library for target `%s'\n", 1149 t->u.user.name); 1150 exit(1); 1151 } 1152 1153 if (target->save) 1154 target->save(&e->ipv6, t); 1155 else { 1156 /* If the target size is greater than ip6t_entry_target 1157 * there is something to be saved, we just don't know 1158 * how to print it */ 1159 if (t->u.target_size != 1160 sizeof(struct ip6t_entry_target)) { 1161 fprintf(stderr, "Target `%s' is missing " 1162 "save function\n", 1163 t->u.user.name); 1164 exit(1); 1165 } 1166 } 1167 } 1168 printf("\n"); 1169 } 1170 1171 static int 1172 list_rules(const ip6t_chainlabel chain, int rulenum, int counters, 1173 struct ip6tc_handle *handle) 1174 { 1175 const char *this = NULL; 1176 int found = 0; 1177 1178 if (counters) 1179 counters = -1; /* iptables -c format */ 1180 1181 /* Dump out chain names first, 1182 * thereby preventing dependency conflicts */ 1183 if (!rulenum) for (this = ip6tc_first_chain(handle); 1184 this; 1185 this = ip6tc_next_chain(handle)) { 1186 if (chain && strcmp(this, chain) != 0) 1187 continue; 1188 1189 if (ip6tc_builtin(this, handle)) { 1190 struct ip6t_counters count; 1191 printf("-P %s %s", this, ip6tc_get_policy(this, &count, handle)); 1192 if (counters) 1193 printf(" -c %llu %llu", (unsigned long long)count.pcnt, (unsigned long long)count.bcnt); 1194 printf("\n"); 1195 } else { 1196 printf("-N %s\n", this); 1197 } 1198 } 1199 1200 for (this = ip6tc_first_chain(handle); 1201 this; 1202 this = ip6tc_next_chain(handle)) { 1203 const struct ip6t_entry *e; 1204 int num = 0; 1205 1206 if (chain && strcmp(this, chain) != 0) 1207 continue; 1208 1209 /* Dump out rules */ 1210 e = ip6tc_first_rule(this, handle); 1211 while(e) { 1212 num++; 1213 if (!rulenum || num == rulenum) 1214 print_rule6(e, handle, this, counters); 1215 e = ip6tc_next_rule(e, handle); 1216 } 1217 found = 1; 1218 } 1219 1220 errno = ENOENT; 1221 return found; 1222 } 1223 1224 static struct ip6t_entry * 1225 generate_entry(const struct ip6t_entry *fw, 1226 struct xtables_rule_match *matches, 1227 struct ip6t_entry_target *target) 1228 { 1229 unsigned int size; 1230 struct xtables_rule_match *matchp; 1231 struct ip6t_entry *e; 1232 1233 size = sizeof(struct ip6t_entry); 1234 for (matchp = matches; matchp; matchp = matchp->next) 1235 size += matchp->match->m->u.match_size; 1236 1237 e = xtables_malloc(size + target->u.target_size); 1238 *e = *fw; 1239 e->target_offset = size; 1240 e->next_offset = size + target->u.target_size; 1241 1242 size = 0; 1243 for (matchp = matches; matchp; matchp = matchp->next) { 1244 memcpy(e->elems + size, matchp->match->m, matchp->match->m->u.match_size); 1245 size += matchp->match->m->u.match_size; 1246 } 1247 memcpy(e->elems + size, target, target->u.target_size); 1248 1249 return e; 1250 } 1251 1252 static void clear_rule_matches(struct xtables_rule_match **matches) 1253 { 1254 struct xtables_rule_match *matchp, *tmp; 1255 1256 for (matchp = *matches; matchp;) { 1257 tmp = matchp->next; 1258 if (matchp->match->m) { 1259 free(matchp->match->m); 1260 matchp->match->m = NULL; 1261 } 1262 if (matchp->match == matchp->match->next) { 1263 free(matchp->match); 1264 matchp->match = NULL; 1265 } 1266 free(matchp); 1267 matchp = tmp; 1268 } 1269 1270 *matches = NULL; 1271 } 1272 1273 static void command_jump(struct iptables_command_state *cs) 1274 { 1275 size_t size; 1276 1277 set_option(&cs->options, OPT_JUMP, &cs->fw6.ipv6.invflags, cs->invert); 1278 cs->jumpto = parse_target(optarg); 1279 /* TRY_LOAD (may be chain name) */ 1280 cs->target = xtables_find_target(cs->jumpto, XTF_TRY_LOAD); 1281 1282 if (cs->target == NULL) 1283 return; 1284 1285 size = XT_ALIGN(sizeof(struct ip6t_entry_target)) + cs->target->size; 1286 1287 cs->target->t = xtables_calloc(1, size); 1288 cs->target->t->u.target_size = size; 1289 strcpy(cs->target->t->u.user.name, cs->jumpto); 1290 cs->target->t->u.user.revision = cs->target->revision; 1291 if (cs->target->init != NULL) 1292 cs->target->init(cs->target->t); 1293 if (cs->target->x6_options != NULL) 1294 opts = xtables_options_xfrm(ip6tables_globals.orig_opts, opts, 1295 cs->target->x6_options, 1296 &cs->target->option_offset); 1297 else 1298 opts = xtables_merge_options(ip6tables_globals.orig_opts, opts, 1299 cs->target->extra_opts, 1300 &cs->target->option_offset); 1301 if (opts == NULL) 1302 xtables_error(OTHER_PROBLEM, "can't alloc memory!"); 1303 } 1304 1305 static void command_match(struct iptables_command_state *cs) 1306 { 1307 struct xtables_match *m; 1308 size_t size; 1309 1310 if (cs->invert) 1311 xtables_error(PARAMETER_PROBLEM, 1312 "unexpected ! flag before --match"); 1313 1314 m = xtables_find_match(optarg, XTF_LOAD_MUST_SUCCEED, &cs->matches); 1315 size = XT_ALIGN(sizeof(struct ip6t_entry_match)) + m->size; 1316 m->m = xtables_calloc(1, size); 1317 m->m->u.match_size = size; 1318 strcpy(m->m->u.user.name, m->name); 1319 m->m->u.user.revision = m->revision; 1320 if (m->init != NULL) 1321 m->init(m->m); 1322 if (m == m->next) 1323 return; 1324 /* Merge options for non-cloned matches */ 1325 if (m->x6_options != NULL) 1326 opts = xtables_options_xfrm(ip6tables_globals.orig_opts, opts, 1327 m->x6_options, &m->option_offset); 1328 else if (m->extra_opts != NULL) 1329 opts = xtables_merge_options(ip6tables_globals.orig_opts, opts, 1330 m->extra_opts, &m->option_offset); 1331 } 1332 1333 int do_command6(int argc, char *argv[], char **table, struct ip6tc_handle **handle) 1334 { 1335 struct iptables_command_state cs; 1336 struct ip6t_entry *e = NULL; 1337 unsigned int nsaddrs = 0, ndaddrs = 0; 1338 struct in6_addr *saddrs = NULL, *daddrs = NULL; 1339 struct in6_addr *smasks = NULL, *dmasks = NULL; 1340 1341 int verbose = 0; 1342 const char *chain = NULL; 1343 const char *shostnetworkmask = NULL, *dhostnetworkmask = NULL; 1344 const char *policy = NULL, *newname = NULL; 1345 unsigned int rulenum = 0, command = 0; 1346 const char *pcnt = NULL, *bcnt = NULL; 1347 int ret = 1; 1348 struct xtables_match *m; 1349 struct xtables_rule_match *matchp; 1350 struct xtables_target *t; 1351 unsigned long long cnt; 1352 1353 memset(&cs, 0, sizeof(cs)); 1354 cs.jumpto = ""; 1355 cs.argv = argv; 1356 1357 /* re-set optind to 0 in case do_command6 gets called 1358 * a second time */ 1359 optind = 0; 1360 1361 /* clear mflags in case do_command6 gets called a second time 1362 * (we clear the global list of all matches for security)*/ 1363 for (m = xtables_matches; m; m = m->next) 1364 m->mflags = 0; 1365 1366 for (t = xtables_targets; t; t = t->next) { 1367 t->tflags = 0; 1368 t->used = 0; 1369 } 1370 1371 /* Suppress error messages: we may add new options if we 1372 demand-load a protocol. */ 1373 opterr = 0; 1374 1375 opts = xt_params->orig_opts; 1376 while ((cs.c = getopt_long(argc, argv, 1377 "-:A:C:D:R:I:L::S::M:F::Z::N:X::E:P:Vh::o:p:s:d:j:i:bvnt:m:xc:g:46", 1378 opts, NULL)) != -1) { 1379 switch (cs.c) { 1380 /* 1381 * Command selection 1382 */ 1383 case 'A': 1384 add_command(&command, CMD_APPEND, CMD_NONE, 1385 cs.invert); 1386 chain = optarg; 1387 break; 1388 1389 case 'C': 1390 add_command(&command, CMD_CHECK, CMD_NONE, 1391 cs.invert); 1392 chain = optarg; 1393 break; 1394 1395 case 'D': 1396 add_command(&command, CMD_DELETE, CMD_NONE, 1397 cs.invert); 1398 chain = optarg; 1399 if (optind < argc && argv[optind][0] != '-' 1400 && argv[optind][0] != '!') { 1401 rulenum = parse_rulenumber(argv[optind++]); 1402 command = CMD_DELETE_NUM; 1403 } 1404 break; 1405 1406 case 'R': 1407 add_command(&command, CMD_REPLACE, CMD_NONE, 1408 cs.invert); 1409 chain = optarg; 1410 if (optind < argc && argv[optind][0] != '-' 1411 && argv[optind][0] != '!') 1412 rulenum = parse_rulenumber(argv[optind++]); 1413 else 1414 xtables_error(PARAMETER_PROBLEM, 1415 "-%c requires a rule number", 1416 cmd2char(CMD_REPLACE)); 1417 break; 1418 1419 case 'I': 1420 add_command(&command, CMD_INSERT, CMD_NONE, 1421 cs.invert); 1422 chain = optarg; 1423 if (optind < argc && argv[optind][0] != '-' 1424 && argv[optind][0] != '!') 1425 rulenum = parse_rulenumber(argv[optind++]); 1426 else rulenum = 1; 1427 break; 1428 1429 case 'L': 1430 add_command(&command, CMD_LIST, 1431 CMD_ZERO | CMD_ZERO_NUM, cs.invert); 1432 if (optarg) chain = optarg; 1433 else if (optind < argc && argv[optind][0] != '-' 1434 && argv[optind][0] != '!') 1435 chain = argv[optind++]; 1436 if (optind < argc && argv[optind][0] != '-' 1437 && argv[optind][0] != '!') 1438 rulenum = parse_rulenumber(argv[optind++]); 1439 break; 1440 1441 case 'S': 1442 add_command(&command, CMD_LIST_RULES, 1443 CMD_ZERO | CMD_ZERO_NUM, cs.invert); 1444 if (optarg) chain = optarg; 1445 else if (optind < argc && argv[optind][0] != '-' 1446 && argv[optind][0] != '!') 1447 chain = argv[optind++]; 1448 if (optind < argc && argv[optind][0] != '-' 1449 && argv[optind][0] != '!') 1450 rulenum = parse_rulenumber(argv[optind++]); 1451 break; 1452 1453 case 'F': 1454 add_command(&command, CMD_FLUSH, CMD_NONE, 1455 cs.invert); 1456 if (optarg) chain = optarg; 1457 else if (optind < argc && argv[optind][0] != '-' 1458 && argv[optind][0] != '!') 1459 chain = argv[optind++]; 1460 break; 1461 1462 case 'Z': 1463 add_command(&command, CMD_ZERO, CMD_LIST|CMD_LIST_RULES, 1464 cs.invert); 1465 if (optarg) chain = optarg; 1466 else if (optind < argc && argv[optind][0] != '-' 1467 && argv[optind][0] != '!') 1468 chain = argv[optind++]; 1469 if (optind < argc && argv[optind][0] != '-' 1470 && argv[optind][0] != '!') { 1471 rulenum = parse_rulenumber(argv[optind++]); 1472 command = CMD_ZERO_NUM; 1473 } 1474 break; 1475 1476 case 'N': 1477 if (optarg && (*optarg == '-' || *optarg == '!')) 1478 xtables_error(PARAMETER_PROBLEM, 1479 "chain name not allowed to start " 1480 "with `%c'\n", *optarg); 1481 if (xtables_find_target(optarg, XTF_TRY_LOAD)) 1482 xtables_error(PARAMETER_PROBLEM, 1483 "chain name may not clash " 1484 "with target name\n"); 1485 add_command(&command, CMD_NEW_CHAIN, CMD_NONE, 1486 cs.invert); 1487 chain = optarg; 1488 break; 1489 1490 case 'X': 1491 add_command(&command, CMD_DELETE_CHAIN, CMD_NONE, 1492 cs.invert); 1493 if (optarg) chain = optarg; 1494 else if (optind < argc && argv[optind][0] != '-' 1495 && argv[optind][0] != '!') 1496 chain = argv[optind++]; 1497 break; 1498 1499 case 'E': 1500 add_command(&command, CMD_RENAME_CHAIN, CMD_NONE, 1501 cs.invert); 1502 chain = optarg; 1503 if (optind < argc && argv[optind][0] != '-' 1504 && argv[optind][0] != '!') 1505 newname = argv[optind++]; 1506 else 1507 xtables_error(PARAMETER_PROBLEM, 1508 "-%c requires old-chain-name and " 1509 "new-chain-name", 1510 cmd2char(CMD_RENAME_CHAIN)); 1511 break; 1512 1513 case 'P': 1514 add_command(&command, CMD_SET_POLICY, CMD_NONE, 1515 cs.invert); 1516 chain = optarg; 1517 if (optind < argc && argv[optind][0] != '-' 1518 && argv[optind][0] != '!') 1519 policy = argv[optind++]; 1520 else 1521 xtables_error(PARAMETER_PROBLEM, 1522 "-%c requires a chain and a policy", 1523 cmd2char(CMD_SET_POLICY)); 1524 break; 1525 1526 case 'h': 1527 if (!optarg) 1528 optarg = argv[optind]; 1529 1530 /* ip6tables -p icmp -h */ 1531 if (!cs.matches && cs.protocol) 1532 xtables_find_match(cs.protocol, XTF_TRY_LOAD, 1533 &cs.matches); 1534 1535 exit_printhelp(cs.matches); 1536 1537 /* 1538 * Option selection 1539 */ 1540 case 'p': 1541 xtables_check_inverse(optarg, &cs.invert, &optind, argc, argv); 1542 set_option(&cs.options, OPT_PROTOCOL, &cs.fw6.ipv6.invflags, 1543 cs.invert); 1544 1545 /* Canonicalize into lower case */ 1546 for (cs.protocol = optarg; *cs.protocol; cs.protocol++) 1547 *cs.protocol = tolower(*cs.protocol); 1548 1549 cs.protocol = optarg; 1550 cs.fw6.ipv6.proto = xtables_parse_protocol(cs.protocol); 1551 cs.fw6.ipv6.flags |= IP6T_F_PROTO; 1552 1553 if (cs.fw6.ipv6.proto == 0 1554 && (cs.fw6.ipv6.invflags & IP6T_INV_PROTO)) 1555 xtables_error(PARAMETER_PROBLEM, 1556 "rule would never match protocol"); 1557 1558 if (is_exthdr(cs.fw6.ipv6.proto) 1559 && (cs.fw6.ipv6.invflags & IP6T_INV_PROTO) == 0) 1560 fprintf(stderr, 1561 "Warning: never matched protocol: %s. " 1562 "use extension match instead.\n", 1563 cs.protocol); 1564 break; 1565 1566 case 's': 1567 xtables_check_inverse(optarg, &cs.invert, &optind, argc, argv); 1568 set_option(&cs.options, OPT_SOURCE, &cs.fw6.ipv6.invflags, 1569 cs.invert); 1570 shostnetworkmask = optarg; 1571 break; 1572 1573 case 'd': 1574 xtables_check_inverse(optarg, &cs.invert, &optind, argc, argv); 1575 set_option(&cs.options, OPT_DESTINATION, &cs.fw6.ipv6.invflags, 1576 cs.invert); 1577 dhostnetworkmask = optarg; 1578 break; 1579 1580 #ifdef IP6T_F_GOTO 1581 case 'g': 1582 set_option(&cs.options, OPT_JUMP, &cs.fw6.ipv6.invflags, 1583 cs.invert); 1584 cs.fw6.ipv6.flags |= IP6T_F_GOTO; 1585 cs.jumpto = parse_target(optarg); 1586 break; 1587 #endif 1588 1589 case 'j': 1590 command_jump(&cs); 1591 break; 1592 1593 1594 case 'i': 1595 if (*optarg == '\0') 1596 xtables_error(PARAMETER_PROBLEM, 1597 "Empty interface is likely to be " 1598 "undesired"); 1599 xtables_check_inverse(optarg, &cs.invert, &optind, argc, argv); 1600 set_option(&cs.options, OPT_VIANAMEIN, &cs.fw6.ipv6.invflags, 1601 cs.invert); 1602 xtables_parse_interface(optarg, 1603 cs.fw6.ipv6.iniface, 1604 cs.fw6.ipv6.iniface_mask); 1605 break; 1606 1607 case 'o': 1608 if (*optarg == '\0') 1609 xtables_error(PARAMETER_PROBLEM, 1610 "Empty interface is likely to be " 1611 "undesired"); 1612 xtables_check_inverse(optarg, &cs.invert, &optind, argc, argv); 1613 set_option(&cs.options, OPT_VIANAMEOUT, &cs.fw6.ipv6.invflags, 1614 cs.invert); 1615 xtables_parse_interface(optarg, 1616 cs.fw6.ipv6.outiface, 1617 cs.fw6.ipv6.outiface_mask); 1618 break; 1619 1620 case 'v': 1621 if (!verbose) 1622 set_option(&cs.options, OPT_VERBOSE, 1623 &cs.fw6.ipv6.invflags, cs.invert); 1624 verbose++; 1625 break; 1626 1627 case 'm': 1628 command_match(&cs); 1629 break; 1630 1631 case 'n': 1632 set_option(&cs.options, OPT_NUMERIC, &cs.fw6.ipv6.invflags, 1633 cs.invert); 1634 break; 1635 1636 case 't': 1637 if (cs.invert) 1638 xtables_error(PARAMETER_PROBLEM, 1639 "unexpected ! flag before --table"); 1640 *table = optarg; 1641 break; 1642 1643 case 'x': 1644 set_option(&cs.options, OPT_EXPANDED, &cs.fw6.ipv6.invflags, 1645 cs.invert); 1646 break; 1647 1648 case 'V': 1649 if (cs.invert) 1650 printf("Not %s ;-)\n", prog_vers); 1651 else 1652 printf("%s v%s\n", 1653 prog_name, prog_vers); 1654 exit(0); 1655 1656 case '0': 1657 set_option(&cs.options, OPT_LINENUMBERS, &cs.fw6.ipv6.invflags, 1658 cs.invert); 1659 break; 1660 1661 case 'M': 1662 xtables_modprobe_program = optarg; 1663 break; 1664 1665 case 'c': 1666 1667 set_option(&cs.options, OPT_COUNTERS, &cs.fw6.ipv6.invflags, 1668 cs.invert); 1669 pcnt = optarg; 1670 bcnt = strchr(pcnt + 1, ','); 1671 if (bcnt) 1672 bcnt++; 1673 if (!bcnt && optind < argc && argv[optind][0] != '-' 1674 && argv[optind][0] != '!') 1675 bcnt = argv[optind++]; 1676 if (!bcnt) 1677 xtables_error(PARAMETER_PROBLEM, 1678 "-%c requires packet and byte counter", 1679 opt2char(OPT_COUNTERS)); 1680 1681 if (sscanf(pcnt, "%llu", &cnt) != 1) 1682 xtables_error(PARAMETER_PROBLEM, 1683 "-%c packet counter not numeric", 1684 opt2char(OPT_COUNTERS)); 1685 cs.fw6.counters.pcnt = cnt; 1686 1687 if (sscanf(bcnt, "%llu", &cnt) != 1) 1688 xtables_error(PARAMETER_PROBLEM, 1689 "-%c byte counter not numeric", 1690 opt2char(OPT_COUNTERS)); 1691 cs.fw6.counters.bcnt = cnt; 1692 break; 1693 1694 case '4': 1695 /* This is not the IPv4 iptables */ 1696 if (line != -1) 1697 return 1; /* success: line ignored */ 1698 fprintf(stderr, "This is the IPv6 version of ip6tables.\n"); 1699 exit_tryhelp(2); 1700 1701 case '6': 1702 /* This is indeed the IPv6 ip6tables */ 1703 break; 1704 1705 case 1: /* non option */ 1706 if (optarg[0] == '!' && optarg[1] == '\0') { 1707 if (cs.invert) 1708 xtables_error(PARAMETER_PROBLEM, 1709 "multiple consecutive ! not" 1710 " allowed"); 1711 cs.invert = TRUE; 1712 optarg[0] = '\0'; 1713 continue; 1714 } 1715 fprintf(stderr, "Bad argument `%s'\n", optarg); 1716 exit_tryhelp(2); 1717 1718 default: 1719 if (command_default(&cs, &ip6tables_globals) == 1) 1720 /* 1721 * If new options were loaded, we must retry 1722 * getopt immediately and not allow 1723 * cs.invert=FALSE to be executed. 1724 */ 1725 continue; 1726 break; 1727 } 1728 cs.invert = FALSE; 1729 } 1730 1731 for (matchp = cs.matches; matchp; matchp = matchp->next) 1732 xtables_option_mfcall(matchp->match); 1733 if (cs.target != NULL) 1734 xtables_option_tfcall(cs.target); 1735 1736 /* Fix me: must put inverse options checking here --MN */ 1737 1738 if (optind < argc) 1739 xtables_error(PARAMETER_PROBLEM, 1740 "unknown arguments found on commandline"); 1741 if (!command) 1742 xtables_error(PARAMETER_PROBLEM, "no command specified"); 1743 if (cs.invert) 1744 xtables_error(PARAMETER_PROBLEM, 1745 "nothing appropriate following !"); 1746 1747 if (command & (CMD_REPLACE | CMD_INSERT | CMD_DELETE | CMD_APPEND | CMD_CHECK)) { 1748 if (!(cs.options & OPT_DESTINATION)) 1749 dhostnetworkmask = "::0/0"; 1750 if (!(cs.options & OPT_SOURCE)) 1751 shostnetworkmask = "::0/0"; 1752 } 1753 1754 if (shostnetworkmask) 1755 xtables_ip6parse_multiple(shostnetworkmask, &saddrs, 1756 &smasks, &nsaddrs); 1757 1758 if (dhostnetworkmask) 1759 xtables_ip6parse_multiple(dhostnetworkmask, &daddrs, 1760 &dmasks, &ndaddrs); 1761 1762 if ((nsaddrs > 1 || ndaddrs > 1) && 1763 (cs.fw6.ipv6.invflags & (IP6T_INV_SRCIP | IP6T_INV_DSTIP))) 1764 xtables_error(PARAMETER_PROBLEM, "! not allowed with multiple" 1765 " source or destination IP addresses"); 1766 1767 if (command == CMD_REPLACE && (nsaddrs != 1 || ndaddrs != 1)) 1768 xtables_error(PARAMETER_PROBLEM, "Replacement rule does not " 1769 "specify a unique address"); 1770 1771 generic_opt_check(command, cs.options); 1772 1773 if (chain != NULL && strlen(chain) >= XT_EXTENSION_MAXNAMELEN) 1774 xtables_error(PARAMETER_PROBLEM, 1775 "chain name `%s' too long (must be under %u chars)", 1776 chain, XT_EXTENSION_MAXNAMELEN); 1777 1778 /* only allocate handle if we weren't called with a handle */ 1779 if (!*handle) 1780 *handle = ip6tc_init(*table); 1781 1782 /* try to insmod the module if iptc_init failed */ 1783 if (!*handle && xtables_load_ko(xtables_modprobe_program, false) != -1) 1784 *handle = ip6tc_init(*table); 1785 1786 if (!*handle) 1787 xtables_error(VERSION_PROBLEM, 1788 "can't initialize ip6tables table `%s': %s", 1789 *table, ip6tc_strerror(errno)); 1790 1791 if (command == CMD_APPEND 1792 || command == CMD_DELETE 1793 || command == CMD_CHECK 1794 || command == CMD_INSERT 1795 || command == CMD_REPLACE) { 1796 if (strcmp(chain, "PREROUTING") == 0 1797 || strcmp(chain, "INPUT") == 0) { 1798 /* -o not valid with incoming packets. */ 1799 if (cs.options & OPT_VIANAMEOUT) 1800 xtables_error(PARAMETER_PROBLEM, 1801 "Can't use -%c with %s\n", 1802 opt2char(OPT_VIANAMEOUT), 1803 chain); 1804 } 1805 1806 if (strcmp(chain, "POSTROUTING") == 0 1807 || strcmp(chain, "OUTPUT") == 0) { 1808 /* -i not valid with outgoing packets */ 1809 if (cs.options & OPT_VIANAMEIN) 1810 xtables_error(PARAMETER_PROBLEM, 1811 "Can't use -%c with %s\n", 1812 opt2char(OPT_VIANAMEIN), 1813 chain); 1814 } 1815 1816 if (cs.target && ip6tc_is_chain(cs.jumpto, *handle)) { 1817 fprintf(stderr, 1818 "Warning: using chain %s, not extension\n", 1819 cs.jumpto); 1820 1821 if (cs.target->t) 1822 free(cs.target->t); 1823 1824 cs.target = NULL; 1825 } 1826 1827 /* If they didn't specify a target, or it's a chain 1828 name, use standard. */ 1829 if (!cs.target 1830 && (strlen(cs.jumpto) == 0 1831 || ip6tc_is_chain(cs.jumpto, *handle))) { 1832 size_t size; 1833 1834 cs.target = xtables_find_target(IP6T_STANDARD_TARGET, 1835 XTF_LOAD_MUST_SUCCEED); 1836 1837 size = sizeof(struct ip6t_entry_target) 1838 + cs.target->size; 1839 cs.target->t = xtables_calloc(1, size); 1840 cs.target->t->u.target_size = size; 1841 strcpy(cs.target->t->u.user.name, cs.jumpto); 1842 if (cs.target->init != NULL) 1843 cs.target->init(cs.target->t); 1844 } 1845 1846 if (!cs.target) { 1847 /* it is no chain, and we can't load a plugin. 1848 * We cannot know if the plugin is corrupt, non 1849 * existant OR if the user just misspelled a 1850 * chain. */ 1851 #ifdef IP6T_F_GOTO 1852 if (cs.fw6.ipv6.flags & IP6T_F_GOTO) 1853 xtables_error(PARAMETER_PROBLEM, 1854 "goto '%s' is not a chain\n", 1855 cs.jumpto); 1856 #endif 1857 xtables_find_target(cs.jumpto, XTF_LOAD_MUST_SUCCEED); 1858 } else { 1859 e = generate_entry(&cs.fw6, cs.matches, cs.target->t); 1860 free(cs.target->t); 1861 } 1862 } 1863 1864 switch (command) { 1865 case CMD_APPEND: 1866 ret = append_entry(chain, e, 1867 nsaddrs, saddrs, smasks, 1868 ndaddrs, daddrs, dmasks, 1869 cs.options&OPT_VERBOSE, 1870 *handle); 1871 break; 1872 case CMD_DELETE: 1873 ret = delete_entry(chain, e, 1874 nsaddrs, saddrs, smasks, 1875 ndaddrs, daddrs, dmasks, 1876 cs.options&OPT_VERBOSE, 1877 *handle, cs.matches, cs.target); 1878 break; 1879 case CMD_DELETE_NUM: 1880 ret = ip6tc_delete_num_entry(chain, rulenum - 1, *handle); 1881 break; 1882 case CMD_CHECK: 1883 ret = check_entry(chain, e, 1884 nsaddrs, saddrs, smasks, 1885 ndaddrs, daddrs, dmasks, 1886 cs.options&OPT_VERBOSE, 1887 *handle, cs.matches, cs.target); 1888 break; 1889 case CMD_REPLACE: 1890 ret = replace_entry(chain, e, rulenum - 1, 1891 saddrs, smasks, daddrs, dmasks, 1892 cs.options&OPT_VERBOSE, *handle); 1893 break; 1894 case CMD_INSERT: 1895 ret = insert_entry(chain, e, rulenum - 1, 1896 nsaddrs, saddrs, smasks, 1897 ndaddrs, daddrs, dmasks, 1898 cs.options&OPT_VERBOSE, 1899 *handle); 1900 break; 1901 case CMD_FLUSH: 1902 ret = flush_entries6(chain, cs.options&OPT_VERBOSE, *handle); 1903 break; 1904 case CMD_ZERO: 1905 ret = zero_entries(chain, cs.options&OPT_VERBOSE, *handle); 1906 break; 1907 case CMD_ZERO_NUM: 1908 ret = ip6tc_zero_counter(chain, rulenum, *handle); 1909 break; 1910 case CMD_LIST: 1911 case CMD_LIST|CMD_ZERO: 1912 case CMD_LIST|CMD_ZERO_NUM: 1913 ret = list_entries(chain, 1914 rulenum, 1915 cs.options&OPT_VERBOSE, 1916 cs.options&OPT_NUMERIC, 1917 cs.options&OPT_EXPANDED, 1918 cs.options&OPT_LINENUMBERS, 1919 *handle); 1920 if (ret && (command & CMD_ZERO)) 1921 ret = zero_entries(chain, 1922 cs.options&OPT_VERBOSE, *handle); 1923 if (ret && (command & CMD_ZERO_NUM)) 1924 ret = ip6tc_zero_counter(chain, rulenum, *handle); 1925 break; 1926 case CMD_LIST_RULES: 1927 case CMD_LIST_RULES|CMD_ZERO: 1928 case CMD_LIST_RULES|CMD_ZERO_NUM: 1929 ret = list_rules(chain, 1930 rulenum, 1931 cs.options&OPT_VERBOSE, 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 = ip6tc_zero_counter(chain, rulenum, *handle); 1938 break; 1939 case CMD_NEW_CHAIN: 1940 ret = ip6tc_create_chain(chain, *handle); 1941 break; 1942 case CMD_DELETE_CHAIN: 1943 ret = delete_chain6(chain, cs.options&OPT_VERBOSE, *handle); 1944 break; 1945 case CMD_RENAME_CHAIN: 1946 ret = ip6tc_rename_chain(chain, newname, *handle); 1947 break; 1948 case CMD_SET_POLICY: 1949 ret = ip6tc_set_policy(chain, policy, cs.options&OPT_COUNTERS ? &cs.fw6.counters : NULL, *handle); 1950 break; 1951 default: 1952 /* We should never reach this... */ 1953 exit_tryhelp(2); 1954 } 1955 1956 if (verbose > 1) 1957 dump_entries6(*handle); 1958 1959 clear_rule_matches(&cs.matches); 1960 1961 if (e != NULL) { 1962 free(e); 1963 e = NULL; 1964 } 1965 1966 free(saddrs); 1967 free(smasks); 1968 free(daddrs); 1969 free(dmasks); 1970 xtables_free_opts(1); 1971 1972 return ret; 1973 } 1974
