1 /* Code to take an ip6tables-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 <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 CMD_NONE 0x0000U
56 #define CMD_INSERT 0x0001U
57 #define CMD_DELETE 0x0002U
58 #define CMD_DELETE_NUM 0x0004U
59 #define CMD_REPLACE 0x0008U
60 #define CMD_APPEND 0x0010U
61 #define CMD_LIST 0x0020U
62 #define CMD_FLUSH 0x0040U
63 #define CMD_ZERO 0x0080U
64 #define CMD_NEW_CHAIN 0x0100U
65 #define CMD_DELETE_CHAIN 0x0200U
66 #define CMD_SET_POLICY 0x0400U
67 #define CMD_RENAME_CHAIN 0x0800U
68 #define CMD_LIST_RULES 0x1000U
69 #define CMD_ZERO_NUM 0x2000U
70 #define CMD_CHECK 0x4000U
71 #define NUMBER_OF_CMD 16
72 static const char cmdflags[] = { 'I', 'D', 'D', 'R', 'A', 'L', 'F', 'Z',
73 'N', 'X', 'P', 'E', 'S', 'Z', 'C' };
74
75 #define NUMBER_OF_OPT ARRAY_SIZE(optflags)
76 static const char optflags[]
77 = { 'n', 's', 'd', 'p', 'j', 'v', 'x', 'i', 'o', '0', 'c'};
78
79 static const char unsupported_rev[] = " [unsupported revision]";
80
81 static struct option original_opts[] = {
82 {.name = "append", .has_arg = 1, .val = 'A'},
83 {.name = "delete", .has_arg = 1, .val = 'D'},
84 {.name = "check" , .has_arg = 1, .val = 'C'},
85 {.name = "insert", .has_arg = 1, .val = 'I'},
86 {.name = "replace", .has_arg = 1, .val = 'R'},
87 {.name = "list", .has_arg = 2, .val = 'L'},
88 {.name = "list-rules", .has_arg = 2, .val = 'S'},
89 {.name = "flush", .has_arg = 2, .val = 'F'},
90 {.name = "zero", .has_arg = 2, .val = 'Z'},
91 {.name = "new-chain", .has_arg = 1, .val = 'N'},
92 {.name = "delete-chain", .has_arg = 2, .val = 'X'},
93 {.name = "rename-chain", .has_arg = 1, .val = 'E'},
94 {.name = "policy", .has_arg = 1, .val = 'P'},
95 {.name = "source", .has_arg = 1, .val = 's'},
96 {.name = "destination", .has_arg = 1, .val = 'd'},
97 {.name = "src", .has_arg = 1, .val = 's'}, /* synonym */
98 {.name = "dst", .has_arg = 1, .val = 'd'}, /* synonym */
99 {.name = "protocol", .has_arg = 1, .val = 'p'},
100 {.name = "in-interface", .has_arg = 1, .val = 'i'},
101 {.name = "jump", .has_arg = 1, .val = 'j'},
102 {.name = "table", .has_arg = 1, .val = 't'},
103 {.name = "match", .has_arg = 1, .val = 'm'},
104 {.name = "numeric", .has_arg = 0, .val = 'n'},
105 {.name = "out-interface", .has_arg = 1, .val = 'o'},
106 {.name = "verbose", .has_arg = 0, .val = 'v'},
107 {.name = "wait", .has_arg = 2, .val = 'w'},
108 {.name = "wait-interval", .has_arg = 2, .val = 'W'},
109 {.name = "exact", .has_arg = 0, .val = 'x'},
110 {.name = "version", .has_arg = 0, .val = 'V'},
111 {.name = "help", .has_arg = 2, .val = 'h'},
112 {.name = "line-numbers", .has_arg = 0, .val = '0'},
113 {.name = "modprobe", .has_arg = 1, .val = 'M'},
114 {.name = "set-counters", .has_arg = 1, .val = 'c'},
115 {.name = "goto", .has_arg = 1, .val = 'g'},
116 {.name = "ipv4", .has_arg = 0, .val = '4'},
117 {.name = "ipv6", .has_arg = 0, .val = '6'},
118 {NULL},
119 };
120
121 void ip6tables_exit_error(enum xtables_exittype status, const char *msg, ...) __attribute__((noreturn, format(printf,2,3)));
122 struct xtables_globals ip6tables_globals = {
123 .option_offset = 0,
124 .program_version = IPTABLES_VERSION,
125 .orig_opts = original_opts,
126 .exit_err = ip6tables_exit_error,
127 .compat_rev = xtables_compatible_revision,
128 };
129
130 /* Table of legal combinations of commands and options. If any of the
131 * given commands make an option legal, that option is legal (applies to
132 * CMD_LIST and CMD_ZERO only).
133 * Key:
134 * + compulsory
135 * x illegal
136 * optional
137 */
138
139 static const char commands_v_options[NUMBER_OF_CMD][NUMBER_OF_OPT] =
140 /* Well, it's better than "Re: Linux vs FreeBSD" */
141 {
142 /* -n -s -d -p -j -v -x -i -o --line -c */
143 /*INSERT*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x',' '},
144 /*DELETE*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x','x'},
145 /*DELETE_NUM*/{'x','x','x','x','x',' ','x','x','x','x','x'},
146 /*REPLACE*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x',' '},
147 /*APPEND*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x',' '},
148 /*LIST*/ {' ','x','x','x','x',' ',' ','x','x',' ','x'},
149 /*FLUSH*/ {'x','x','x','x','x',' ','x','x','x','x','x'},
150 /*ZERO*/ {'x','x','x','x','x',' ','x','x','x','x','x'},
151 /*NEW_CHAIN*/ {'x','x','x','x','x',' ','x','x','x','x','x'},
152 /*DEL_CHAIN*/ {'x','x','x','x','x',' ','x','x','x','x','x'},
153 /*SET_POLICY*/{'x','x','x','x','x',' ','x','x','x','x',' '},
154 /*RENAME*/ {'x','x','x','x','x',' ','x','x','x','x','x'},
155 /*LIST_RULES*/{'x','x','x','x','x',' ','x','x','x','x','x'},
156 /*ZERO_NUM*/ {'x','x','x','x','x',' ','x','x','x','x','x'},
157 /*CHECK*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x','x'},
158 };
159
160 static const unsigned int inverse_for_options[NUMBER_OF_OPT] =
161 {
162 /* -n */ 0,
163 /* -s */ IP6T_INV_SRCIP,
164 /* -d */ IP6T_INV_DSTIP,
165 /* -p */ XT_INV_PROTO,
166 /* -j */ 0,
167 /* -v */ 0,
168 /* -x */ 0,
169 /* -i */ IP6T_INV_VIA_IN,
170 /* -o */ IP6T_INV_VIA_OUT,
171 /*--line*/ 0,
172 /* -c */ 0,
173 };
174
175 #define opts ip6tables_globals.opts
176 #define prog_name ip6tables_globals.program_name
177 #define prog_vers ip6tables_globals.program_version
178 /* A few hardcoded protocols for 'all' and in case the user has no
179 /etc/protocols */
180 struct pprot {
181 const char *name;
182 uint8_t num;
183 };
184
185 static void __attribute__((noreturn))
exit_tryhelp(int status)186 exit_tryhelp(int status)
187 {
188 if (line != -1)
189 fprintf(stderr, "Error occurred at line: %d\n", line);
190 fprintf(stderr, "Try `%s -h' or '%s --help' for more information.\n",
191 prog_name, prog_name);
192 xtables_free_opts(1);
193 exit(status);
194 }
195
196 static void
exit_printhelp(const struct xtables_rule_match * matches)197 exit_printhelp(const struct xtables_rule_match *matches)
198 {
199 printf("%s v%s\n\n"
200 "Usage: %s -[ACD] chain rule-specification [options]\n"
201 " %s -I chain [rulenum] rule-specification [options]\n"
202 " %s -R chain rulenum rule-specification [options]\n"
203 " %s -D chain rulenum [options]\n"
204 " %s -[LS] [chain [rulenum]] [options]\n"
205 " %s -[FZ] [chain] [options]\n"
206 " %s -[NX] chain\n"
207 " %s -E old-chain-name new-chain-name\n"
208 " %s -P chain target [options]\n"
209 " %s -h (print this help information)\n\n",
210 prog_name, prog_vers, prog_name, prog_name,
211 prog_name, prog_name, prog_name, prog_name,
212 prog_name, prog_name, prog_name, prog_name);
213
214 printf(
215 "Commands:\n"
216 "Either long or short options are allowed.\n"
217 " --append -A chain Append to chain\n"
218 " --check -C chain Check for the existence of a rule\n"
219 " --delete -D chain Delete matching rule from chain\n"
220 " --delete -D chain rulenum\n"
221 " Delete rule rulenum (1 = first) from chain\n"
222 " --insert -I chain [rulenum]\n"
223 " Insert in chain as rulenum (default 1=first)\n"
224 " --replace -R chain rulenum\n"
225 " Replace rule rulenum (1 = first) in chain\n"
226 " --list -L [chain [rulenum]]\n"
227 " List the rules in a chain or all chains\n"
228 " --list-rules -S [chain [rulenum]]\n"
229 " Print the rules in a chain or all chains\n"
230 " --flush -F [chain] Delete all rules in chain or all chains\n"
231 " --zero -Z [chain [rulenum]]\n"
232 " Zero counters in chain or all chains\n"
233 " --new -N chain Create a new user-defined chain\n"
234 " --delete-chain\n"
235 " -X [chain] Delete a user-defined chain\n"
236 " --policy -P chain target\n"
237 " Change policy on chain to target\n"
238 " --rename-chain\n"
239 " -E old-chain new-chain\n"
240 " Change chain name, (moving any references)\n"
241
242 "Options:\n"
243 " --ipv4 -4 Error (line is ignored by ip6tables-restore)\n"
244 " --ipv6 -6 Nothing (line is ignored by iptables-restore)\n"
245 "[!] --protocol -p proto protocol: by number or name, eg. `tcp'\n"
246 "[!] --source -s address[/mask][,...]\n"
247 " source specification\n"
248 "[!] --destination -d address[/mask][,...]\n"
249 " destination specification\n"
250 "[!] --in-interface -i input name[+]\n"
251 " network interface name ([+] for wildcard)\n"
252 " --jump -j target\n"
253 " target for rule (may load target extension)\n"
254 #ifdef IP6T_F_GOTO
255 " --goto -g chain\n"
256 " jump to chain with no return\n"
257 #endif
258 " --match -m match\n"
259 " extended match (may load extension)\n"
260 " --numeric -n numeric output of addresses and ports\n"
261 "[!] --out-interface -o output name[+]\n"
262 " network interface name ([+] for wildcard)\n"
263 " --table -t table table to manipulate (default: `filter')\n"
264 " --verbose -v verbose mode\n"
265 " --wait -w [seconds] maximum wait to acquire xtables lock before give up\n"
266 " --wait-interval -W [usecs] wait time to try to acquire xtables lock\n"
267 " interval to wait for xtables lock\n"
268 " default is 1 second\n"
269 " --line-numbers print line numbers when listing\n"
270 " --exact -x expand numbers (display exact values)\n"
271 /*"[!] --fragment -f match second or further fragments only\n"*/
272 " --modprobe=<command> try to insert modules using this command\n"
273 " --set-counters PKTS BYTES set the counter during insert/append\n"
274 "[!] --version -V print package version.\n");
275
276 print_extension_helps(xtables_targets, matches);
277 exit(0);
278 }
279
280 void
ip6tables_exit_error(enum xtables_exittype status,const char * msg,...)281 ip6tables_exit_error(enum xtables_exittype status, const char *msg, ...)
282 {
283 va_list args;
284
285 va_start(args, msg);
286 fprintf(stderr, "%s v%s: ", prog_name, prog_vers);
287 vfprintf(stderr, msg, args);
288 va_end(args);
289 fprintf(stderr, "\n");
290 if (status == PARAMETER_PROBLEM)
291 exit_tryhelp(status);
292 if (status == VERSION_PROBLEM)
293 fprintf(stderr,
294 "Perhaps ip6tables or your kernel needs to be upgraded.\n");
295 /* On error paths, make sure that we don't leak memory */
296 xtables_free_opts(1);
297 exit(status);
298 }
299
300 static void
generic_opt_check(int command,int options)301 generic_opt_check(int command, int options)
302 {
303 int i, j, legal = 0;
304
305 /* Check that commands are valid with options. Complicated by the
306 * fact that if an option is legal with *any* command given, it is
307 * legal overall (ie. -z and -l).
308 */
309 for (i = 0; i < NUMBER_OF_OPT; i++) {
310 legal = 0; /* -1 => illegal, 1 => legal, 0 => undecided. */
311
312 for (j = 0; j < NUMBER_OF_CMD; j++) {
313 if (!(command & (1<<j)))
314 continue;
315
316 if (!(options & (1<<i))) {
317 if (commands_v_options[j][i] == '+')
318 xtables_error(PARAMETER_PROBLEM,
319 "You need to supply the `-%c' "
320 "option for this command\n",
321 optflags[i]);
322 } else {
323 if (commands_v_options[j][i] != 'x')
324 legal = 1;
325 else if (legal == 0)
326 legal = -1;
327 }
328 }
329 if (legal == -1)
330 xtables_error(PARAMETER_PROBLEM,
331 "Illegal option `-%c' with this command\n",
332 optflags[i]);
333 }
334 }
335
336 static char
opt2char(int option)337 opt2char(int option)
338 {
339 const char *ptr;
340 for (ptr = optflags; option > 1; option >>= 1, ptr++);
341
342 return *ptr;
343 }
344
345 static char
cmd2char(int option)346 cmd2char(int option)
347 {
348 const char *ptr;
349 for (ptr = cmdflags; option > 1; option >>= 1, ptr++);
350
351 return *ptr;
352 }
353
354 static void
add_command(unsigned int * cmd,const int newcmd,const int othercmds,int invert)355 add_command(unsigned int *cmd, const int newcmd, const int othercmds,
356 int invert)
357 {
358 if (invert)
359 xtables_error(PARAMETER_PROBLEM, "unexpected '!' flag");
360 if (*cmd & (~othercmds))
361 xtables_error(PARAMETER_PROBLEM, "Cannot use -%c with -%c\n",
362 cmd2char(newcmd), cmd2char(*cmd & (~othercmds)));
363 *cmd |= newcmd;
364 }
365
366 /*
367 * All functions starting with "parse" should succeed, otherwise
368 * the program fails.
369 * Most routines return pointers to static data that may change
370 * between calls to the same or other routines with a few exceptions:
371 * "host_to_addr", "parse_hostnetwork", and "parse_hostnetworkmask"
372 * return global static data.
373 */
374
375 /* These are invalid numbers as upper layer protocol */
is_exthdr(uint16_t proto)376 static int is_exthdr(uint16_t proto)
377 {
378 return (proto == IPPROTO_ROUTING ||
379 proto == IPPROTO_FRAGMENT ||
380 proto == IPPROTO_AH ||
381 proto == IPPROTO_DSTOPTS);
382 }
383
384 /* Can't be zero. */
385 static int
parse_rulenumber(const char * rule)386 parse_rulenumber(const char *rule)
387 {
388 unsigned int rulenum;
389
390 if (!xtables_strtoui(rule, NULL, &rulenum, 1, INT_MAX))
391 xtables_error(PARAMETER_PROBLEM,
392 "Invalid rule number `%s'", rule);
393
394 return rulenum;
395 }
396
397 static void
parse_chain(const char * chainname)398 parse_chain(const char *chainname)
399 {
400 const char *ptr;
401
402 if (strlen(chainname) >= XT_EXTENSION_MAXNAMELEN)
403 xtables_error(PARAMETER_PROBLEM,
404 "chain name `%s' too long (must be under %u chars)",
405 chainname, XT_EXTENSION_MAXNAMELEN);
406
407 if (*chainname == '-' || *chainname == '!')
408 xtables_error(PARAMETER_PROBLEM,
409 "chain name not allowed to start "
410 "with `%c'\n", *chainname);
411
412 if (xtables_find_target(chainname, XTF_TRY_LOAD))
413 xtables_error(PARAMETER_PROBLEM,
414 "chain name may not clash "
415 "with target name\n");
416
417 for (ptr = chainname; *ptr; ptr++)
418 if (isspace(*ptr))
419 xtables_error(PARAMETER_PROBLEM,
420 "Invalid chain name `%s'", chainname);
421 }
422
423 static const char *
parse_target(const char * targetname)424 parse_target(const char *targetname)
425 {
426 const char *ptr;
427
428 if (strlen(targetname) < 1)
429 xtables_error(PARAMETER_PROBLEM,
430 "Invalid target name (too short)");
431
432 if (strlen(targetname) >= XT_EXTENSION_MAXNAMELEN)
433 xtables_error(PARAMETER_PROBLEM,
434 "Invalid target name `%s' (%u chars max)",
435 targetname, XT_EXTENSION_MAXNAMELEN - 1);
436
437 for (ptr = targetname; *ptr; ptr++)
438 if (isspace(*ptr))
439 xtables_error(PARAMETER_PROBLEM,
440 "Invalid target name `%s'", targetname);
441 return targetname;
442 }
443
444 static void
set_option(unsigned int * options,unsigned int option,uint8_t * invflg,int invert)445 set_option(unsigned int *options, unsigned int option, uint8_t *invflg,
446 int invert)
447 {
448 if (*options & option)
449 xtables_error(PARAMETER_PROBLEM, "multiple -%c flags not allowed",
450 opt2char(option));
451 *options |= option;
452
453 if (invert) {
454 unsigned int i;
455 for (i = 0; 1 << i != option; i++);
456
457 if (!inverse_for_options[i])
458 xtables_error(PARAMETER_PROBLEM,
459 "cannot have ! before -%c",
460 opt2char(option));
461 *invflg |= inverse_for_options[i];
462 }
463 }
464
465
466 static void
print_header(unsigned int format,const char * chain,struct xtc_handle * handle)467 print_header(unsigned int format, const char *chain, struct xtc_handle *handle)
468 {
469 struct xt_counters counters;
470 const char *pol = ip6tc_get_policy(chain, &counters, handle);
471 printf("Chain %s", chain);
472 if (pol) {
473 printf(" (policy %s", pol);
474 if (!(format & FMT_NOCOUNTS)) {
475 fputc(' ', stdout);
476 xtables_print_num(counters.pcnt, (format|FMT_NOTABLE));
477 fputs("packets, ", stdout);
478 xtables_print_num(counters.bcnt, (format|FMT_NOTABLE));
479 fputs("bytes", stdout);
480 }
481 printf(")\n");
482 } else {
483 unsigned int refs;
484 if (!ip6tc_get_references(&refs, chain, handle))
485 printf(" (ERROR obtaining refs)\n");
486 else
487 printf(" (%u references)\n", refs);
488 }
489
490 if (format & FMT_LINENUMBERS)
491 printf(FMT("%-4s ", "%s "), "num");
492 if (!(format & FMT_NOCOUNTS)) {
493 if (format & FMT_KILOMEGAGIGA) {
494 printf(FMT("%5s ","%s "), "pkts");
495 printf(FMT("%5s ","%s "), "bytes");
496 } else {
497 printf(FMT("%8s ","%s "), "pkts");
498 printf(FMT("%10s ","%s "), "bytes");
499 }
500 }
501 if (!(format & FMT_NOTARGET))
502 printf(FMT("%-9s ","%s "), "target");
503 fputs(" prot ", stdout);
504 if (format & FMT_OPTIONS)
505 fputs("opt", stdout);
506 if (format & FMT_VIA) {
507 printf(FMT(" %-6s ","%s "), "in");
508 printf(FMT("%-6s ","%s "), "out");
509 }
510 printf(FMT(" %-19s ","%s "), "source");
511 printf(FMT(" %-19s "," %s "), "destination");
512 printf("\n");
513 }
514
515
516 static int
print_match(const struct xt_entry_match * m,const struct ip6t_ip6 * ip,int numeric)517 print_match(const struct xt_entry_match *m,
518 const struct ip6t_ip6 *ip,
519 int numeric)
520 {
521 const struct xtables_match *match =
522 xtables_find_match(m->u.user.name, XTF_TRY_LOAD, NULL);
523
524 if (match) {
525 if (match->print && m->u.user.revision == match->revision)
526 match->print(ip, m, numeric);
527 else if (match->print)
528 printf("%s%s ", match->name, unsupported_rev);
529 else
530 printf("%s ", match->name);
531 } else {
532 if (m->u.user.name[0])
533 printf("UNKNOWN match `%s' ", m->u.user.name);
534 }
535 /* Don't stop iterating. */
536 return 0;
537 }
538
539 /* e is called `fw' here for historical reasons */
540 static void
print_firewall(const struct ip6t_entry * fw,const char * targname,unsigned int num,unsigned int format,struct xtc_handle * const handle)541 print_firewall(const struct ip6t_entry *fw,
542 const char *targname,
543 unsigned int num,
544 unsigned int format,
545 struct xtc_handle *const handle)
546 {
547 const struct xtables_target *target = NULL;
548 const struct xt_entry_target *t;
549 char buf[BUFSIZ];
550
551 if (!ip6tc_is_chain(targname, handle))
552 target = xtables_find_target(targname, XTF_TRY_LOAD);
553 else
554 target = xtables_find_target(XT_STANDARD_TARGET,
555 XTF_LOAD_MUST_SUCCEED);
556
557 t = ip6t_get_target((struct ip6t_entry *)fw);
558
559 if (format & FMT_LINENUMBERS)
560 printf(FMT("%-4u ", "%u "), num);
561
562 if (!(format & FMT_NOCOUNTS)) {
563 xtables_print_num(fw->counters.pcnt, format);
564 xtables_print_num(fw->counters.bcnt, format);
565 }
566
567 if (!(format & FMT_NOTARGET))
568 printf(FMT("%-9s ", "%s "), targname);
569
570 fputc(fw->ipv6.invflags & XT_INV_PROTO ? '!' : ' ', stdout);
571 {
572 const char *pname = proto_to_name(fw->ipv6.proto, format&FMT_NUMERIC);
573 if (pname)
574 printf(FMT("%-5s", "%s "), pname);
575 else
576 printf(FMT("%-5hu", "%hu "), fw->ipv6.proto);
577 }
578
579 if (format & FMT_OPTIONS) {
580 if (format & FMT_NOTABLE)
581 fputs("opt ", stdout);
582 fputc(' ', stdout); /* Invert flag of FRAG */
583 fputc(' ', stdout); /* -f */
584 fputc(' ', stdout);
585 }
586
587 if (format & FMT_VIA) {
588 char iface[IFNAMSIZ+2];
589
590 if (fw->ipv6.invflags & IP6T_INV_VIA_IN) {
591 iface[0] = '!';
592 iface[1] = '\0';
593 }
594 else iface[0] = '\0';
595
596 if (fw->ipv6.iniface[0] != '\0') {
597 strcat(iface, fw->ipv6.iniface);
598 }
599 else if (format & FMT_NUMERIC) strcat(iface, "*");
600 else strcat(iface, "any");
601 printf(FMT(" %-6s ","in %s "), iface);
602
603 if (fw->ipv6.invflags & IP6T_INV_VIA_OUT) {
604 iface[0] = '!';
605 iface[1] = '\0';
606 }
607 else iface[0] = '\0';
608
609 if (fw->ipv6.outiface[0] != '\0') {
610 strcat(iface, fw->ipv6.outiface);
611 }
612 else if (format & FMT_NUMERIC) strcat(iface, "*");
613 else strcat(iface, "any");
614 printf(FMT("%-6s ","out %s "), iface);
615 }
616
617 fputc(fw->ipv6.invflags & IP6T_INV_SRCIP ? '!' : ' ', stdout);
618 if (!memcmp(&fw->ipv6.smsk, &in6addr_any, sizeof in6addr_any)
619 && !(format & FMT_NUMERIC))
620 printf(FMT("%-19s ","%s "), "anywhere");
621 else {
622 if (format & FMT_NUMERIC)
623 strcpy(buf, xtables_ip6addr_to_numeric(&fw->ipv6.src));
624 else
625 strcpy(buf, xtables_ip6addr_to_anyname(&fw->ipv6.src));
626 strcat(buf, xtables_ip6mask_to_numeric(&fw->ipv6.smsk));
627 printf(FMT("%-19s ","%s "), buf);
628 }
629
630 fputc(fw->ipv6.invflags & IP6T_INV_DSTIP ? '!' : ' ', stdout);
631 if (!memcmp(&fw->ipv6.dmsk, &in6addr_any, sizeof in6addr_any)
632 && !(format & FMT_NUMERIC))
633 printf(FMT("%-19s ","-> %s"), "anywhere");
634 else {
635 if (format & FMT_NUMERIC)
636 strcpy(buf, xtables_ip6addr_to_numeric(&fw->ipv6.dst));
637 else
638 strcpy(buf, xtables_ip6addr_to_anyname(&fw->ipv6.dst));
639 strcat(buf, xtables_ip6mask_to_numeric(&fw->ipv6.dmsk));
640 printf(FMT("%-19s ","-> %s"), buf);
641 }
642
643 if (format & FMT_NOTABLE)
644 fputs(" ", stdout);
645
646 #ifdef IP6T_F_GOTO
647 if(fw->ipv6.flags & IP6T_F_GOTO)
648 printf("[goto] ");
649 #endif
650
651 IP6T_MATCH_ITERATE(fw, print_match, &fw->ipv6, format & FMT_NUMERIC);
652
653 if (target) {
654 if (target->print && t->u.user.revision == target->revision)
655 /* Print the target information. */
656 target->print(&fw->ipv6, t, format & FMT_NUMERIC);
657 else if (target->print)
658 printf(" %s%s", target->name, unsupported_rev);
659 } else if (t->u.target_size != sizeof(*t))
660 printf("[%u bytes of unknown target data] ",
661 (unsigned int)(t->u.target_size - sizeof(*t)));
662
663 if (!(format & FMT_NONEWLINE))
664 fputc('\n', stdout);
665 }
666
667 static void
print_firewall_line(const struct ip6t_entry * fw,struct xtc_handle * const h)668 print_firewall_line(const struct ip6t_entry *fw,
669 struct xtc_handle *const h)
670 {
671 struct xt_entry_target *t;
672
673 t = ip6t_get_target((struct ip6t_entry *)fw);
674 print_firewall(fw, t->u.user.name, 0, FMT_PRINT_RULE, h);
675 }
676
677 static int
append_entry(const xt_chainlabel chain,struct ip6t_entry * fw,unsigned int nsaddrs,const struct in6_addr saddrs[],const struct in6_addr smasks[],unsigned int ndaddrs,const struct in6_addr daddrs[],const struct in6_addr dmasks[],int verbose,struct xtc_handle * handle)678 append_entry(const xt_chainlabel chain,
679 struct ip6t_entry *fw,
680 unsigned int nsaddrs,
681 const struct in6_addr saddrs[],
682 const struct in6_addr smasks[],
683 unsigned int ndaddrs,
684 const struct in6_addr daddrs[],
685 const struct in6_addr dmasks[],
686 int verbose,
687 struct xtc_handle *handle)
688 {
689 unsigned int i, j;
690 int ret = 1;
691
692 for (i = 0; i < nsaddrs; i++) {
693 fw->ipv6.src = saddrs[i];
694 fw->ipv6.smsk = smasks[i];
695 for (j = 0; j < ndaddrs; j++) {
696 fw->ipv6.dst = daddrs[j];
697 fw->ipv6.dmsk = dmasks[j];
698 if (verbose)
699 print_firewall_line(fw, handle);
700 ret &= ip6tc_append_entry(chain, fw, handle);
701 }
702 }
703
704 return ret;
705 }
706
707 static int
replace_entry(const xt_chainlabel chain,struct ip6t_entry * fw,unsigned int rulenum,const struct in6_addr * saddr,const struct in6_addr * smask,const struct in6_addr * daddr,const struct in6_addr * dmask,int verbose,struct xtc_handle * handle)708 replace_entry(const xt_chainlabel chain,
709 struct ip6t_entry *fw,
710 unsigned int rulenum,
711 const struct in6_addr *saddr, const struct in6_addr *smask,
712 const struct in6_addr *daddr, const struct in6_addr *dmask,
713 int verbose,
714 struct xtc_handle *handle)
715 {
716 fw->ipv6.src = *saddr;
717 fw->ipv6.dst = *daddr;
718 fw->ipv6.smsk = *smask;
719 fw->ipv6.dmsk = *dmask;
720
721 if (verbose)
722 print_firewall_line(fw, handle);
723 return ip6tc_replace_entry(chain, fw, rulenum, handle);
724 }
725
726 static int
insert_entry(const xt_chainlabel chain,struct ip6t_entry * fw,unsigned int rulenum,unsigned int nsaddrs,const struct in6_addr saddrs[],const struct in6_addr smasks[],unsigned int ndaddrs,const struct in6_addr daddrs[],const struct in6_addr dmasks[],int verbose,struct xtc_handle * handle)727 insert_entry(const xt_chainlabel chain,
728 struct ip6t_entry *fw,
729 unsigned int rulenum,
730 unsigned int nsaddrs,
731 const struct in6_addr saddrs[],
732 const struct in6_addr smasks[],
733 unsigned int ndaddrs,
734 const struct in6_addr daddrs[],
735 const struct in6_addr dmasks[],
736 int verbose,
737 struct xtc_handle *handle)
738 {
739 unsigned int i, j;
740 int ret = 1;
741
742 for (i = 0; i < nsaddrs; i++) {
743 fw->ipv6.src = saddrs[i];
744 fw->ipv6.smsk = smasks[i];
745 for (j = 0; j < ndaddrs; j++) {
746 fw->ipv6.dst = daddrs[j];
747 fw->ipv6.dmsk = dmasks[j];
748 if (verbose)
749 print_firewall_line(fw, handle);
750 ret &= ip6tc_insert_entry(chain, fw, rulenum, handle);
751 }
752 }
753
754 return ret;
755 }
756
757 static unsigned char *
make_delete_mask(const struct xtables_rule_match * matches,const struct xtables_target * target)758 make_delete_mask(const struct xtables_rule_match *matches,
759 const struct xtables_target *target)
760 {
761 /* Establish mask for comparison */
762 unsigned int size;
763 const struct xtables_rule_match *matchp;
764 unsigned char *mask, *mptr;
765
766 size = sizeof(struct ip6t_entry);
767 for (matchp = matches; matchp; matchp = matchp->next)
768 size += XT_ALIGN(sizeof(struct xt_entry_match)) + matchp->match->size;
769
770 mask = xtables_calloc(1, size
771 + XT_ALIGN(sizeof(struct xt_entry_target))
772 + target->size);
773
774 memset(mask, 0xFF, sizeof(struct ip6t_entry));
775 mptr = mask + sizeof(struct ip6t_entry);
776
777 for (matchp = matches; matchp; matchp = matchp->next) {
778 memset(mptr, 0xFF,
779 XT_ALIGN(sizeof(struct xt_entry_match))
780 + matchp->match->userspacesize);
781 mptr += XT_ALIGN(sizeof(struct xt_entry_match)) + matchp->match->size;
782 }
783
784 memset(mptr, 0xFF,
785 XT_ALIGN(sizeof(struct xt_entry_target))
786 + target->userspacesize);
787
788 return mask;
789 }
790
791 static int
delete_entry(const xt_chainlabel chain,struct ip6t_entry * fw,unsigned int nsaddrs,const struct in6_addr saddrs[],const struct in6_addr smasks[],unsigned int ndaddrs,const struct in6_addr daddrs[],const struct in6_addr dmasks[],int verbose,struct xtc_handle * handle,struct xtables_rule_match * matches,const struct xtables_target * target)792 delete_entry(const xt_chainlabel chain,
793 struct ip6t_entry *fw,
794 unsigned int nsaddrs,
795 const struct in6_addr saddrs[],
796 const struct in6_addr smasks[],
797 unsigned int ndaddrs,
798 const struct in6_addr daddrs[],
799 const struct in6_addr dmasks[],
800 int verbose,
801 struct xtc_handle *handle,
802 struct xtables_rule_match *matches,
803 const struct xtables_target *target)
804 {
805 unsigned int i, j;
806 int ret = 1;
807 unsigned char *mask;
808
809 mask = make_delete_mask(matches, target);
810 for (i = 0; i < nsaddrs; i++) {
811 fw->ipv6.src = saddrs[i];
812 fw->ipv6.smsk = smasks[i];
813 for (j = 0; j < ndaddrs; j++) {
814 fw->ipv6.dst = daddrs[j];
815 fw->ipv6.dmsk = dmasks[j];
816 if (verbose)
817 print_firewall_line(fw, handle);
818 ret &= ip6tc_delete_entry(chain, fw, mask, handle);
819 }
820 }
821 free(mask);
822
823 return ret;
824 }
825
826 static int
check_entry(const xt_chainlabel chain,struct ip6t_entry * fw,unsigned int nsaddrs,const struct in6_addr * saddrs,const struct in6_addr * smasks,unsigned int ndaddrs,const struct in6_addr * daddrs,const struct in6_addr * dmasks,bool verbose,struct xtc_handle * handle,struct xtables_rule_match * matches,const struct xtables_target * target)827 check_entry(const xt_chainlabel chain, struct ip6t_entry *fw,
828 unsigned int nsaddrs, const struct in6_addr *saddrs,
829 const struct in6_addr *smasks, unsigned int ndaddrs,
830 const struct in6_addr *daddrs, const struct in6_addr *dmasks,
831 bool verbose, struct xtc_handle *handle,
832 struct xtables_rule_match *matches,
833 const struct xtables_target *target)
834 {
835 unsigned int i, j;
836 int ret = 1;
837 unsigned char *mask;
838
839 mask = make_delete_mask(matches, target);
840 for (i = 0; i < nsaddrs; i++) {
841 fw->ipv6.src = saddrs[i];
842 fw->ipv6.smsk = smasks[i];
843 for (j = 0; j < ndaddrs; j++) {
844 fw->ipv6.dst = daddrs[j];
845 fw->ipv6.dmsk = dmasks[j];
846 if (verbose)
847 print_firewall_line(fw, handle);
848 ret &= ip6tc_check_entry(chain, fw, mask, handle);
849 }
850 }
851
852 free(mask);
853 return ret;
854 }
855
856 int
for_each_chain6(int (* fn)(const xt_chainlabel,int,struct xtc_handle *),int verbose,int builtinstoo,struct xtc_handle * handle)857 for_each_chain6(int (*fn)(const xt_chainlabel, int, struct xtc_handle *),
858 int verbose, int builtinstoo, struct xtc_handle *handle)
859 {
860 int ret = 1;
861 const char *chain;
862 char *chains;
863 unsigned int i, chaincount = 0;
864
865 chain = ip6tc_first_chain(handle);
866 while (chain) {
867 chaincount++;
868 chain = ip6tc_next_chain(handle);
869 }
870
871 chains = xtables_malloc(sizeof(xt_chainlabel) * chaincount);
872 i = 0;
873 chain = ip6tc_first_chain(handle);
874 while (chain) {
875 strcpy(chains + i*sizeof(xt_chainlabel), chain);
876 i++;
877 chain = ip6tc_next_chain(handle);
878 }
879
880 for (i = 0; i < chaincount; i++) {
881 if (!builtinstoo
882 && ip6tc_builtin(chains + i*sizeof(xt_chainlabel),
883 handle) == 1)
884 continue;
885 ret &= fn(chains + i*sizeof(xt_chainlabel), verbose, handle);
886 }
887
888 free(chains);
889 return ret;
890 }
891
892 int
flush_entries6(const xt_chainlabel chain,int verbose,struct xtc_handle * handle)893 flush_entries6(const xt_chainlabel chain, int verbose,
894 struct xtc_handle *handle)
895 {
896 if (!chain)
897 return for_each_chain6(flush_entries6, verbose, 1, handle);
898
899 if (verbose)
900 fprintf(stdout, "Flushing chain `%s'\n", chain);
901 return ip6tc_flush_entries(chain, handle);
902 }
903
904 static int
zero_entries(const xt_chainlabel chain,int verbose,struct xtc_handle * handle)905 zero_entries(const xt_chainlabel chain, int verbose,
906 struct xtc_handle *handle)
907 {
908 if (!chain)
909 return for_each_chain6(zero_entries, verbose, 1, handle);
910
911 if (verbose)
912 fprintf(stdout, "Zeroing chain `%s'\n", chain);
913 return ip6tc_zero_entries(chain, handle);
914 }
915
916 int
delete_chain6(const xt_chainlabel chain,int verbose,struct xtc_handle * handle)917 delete_chain6(const xt_chainlabel chain, int verbose,
918 struct xtc_handle *handle)
919 {
920 if (!chain)
921 return for_each_chain6(delete_chain6, verbose, 0, handle);
922
923 if (verbose)
924 fprintf(stdout, "Deleting chain `%s'\n", chain);
925 return ip6tc_delete_chain(chain, handle);
926 }
927
928 static int
list_entries(const xt_chainlabel chain,int rulenum,int verbose,int numeric,int expanded,int linenumbers,struct xtc_handle * handle)929 list_entries(const xt_chainlabel chain, int rulenum, int verbose, int numeric,
930 int expanded, int linenumbers, struct xtc_handle *handle)
931 {
932 int found = 0;
933 unsigned int format;
934 const char *this;
935
936 format = FMT_OPTIONS;
937 if (!verbose)
938 format |= FMT_NOCOUNTS;
939 else
940 format |= FMT_VIA;
941
942 if (numeric)
943 format |= FMT_NUMERIC;
944
945 if (!expanded)
946 format |= FMT_KILOMEGAGIGA;
947
948 if (linenumbers)
949 format |= FMT_LINENUMBERS;
950
951 for (this = ip6tc_first_chain(handle);
952 this;
953 this = ip6tc_next_chain(handle)) {
954 const struct ip6t_entry *i;
955 unsigned int num;
956
957 if (chain && strcmp(chain, this) != 0)
958 continue;
959
960 if (found) printf("\n");
961
962 if (!rulenum)
963 print_header(format, this, handle);
964 i = ip6tc_first_rule(this, handle);
965
966 num = 0;
967 while (i) {
968 num++;
969 if (!rulenum || num == rulenum)
970 print_firewall(i,
971 ip6tc_get_target(i, handle),
972 num,
973 format,
974 handle);
975 i = ip6tc_next_rule(i, handle);
976 }
977 found = 1;
978 }
979
980 errno = ENOENT;
981 return found;
982 }
983
984 /* This assumes that mask is contiguous, and byte-bounded. */
985 static void
print_iface(char letter,const char * iface,const unsigned char * mask,int invert)986 print_iface(char letter, const char *iface, const unsigned char *mask,
987 int invert)
988 {
989 unsigned int i;
990
991 if (mask[0] == 0)
992 return;
993
994 printf("%s -%c ", invert ? " !" : "", letter);
995
996 for (i = 0; i < IFNAMSIZ; i++) {
997 if (mask[i] != 0) {
998 if (iface[i] != '\0')
999 printf("%c", iface[i]);
1000 } else {
1001 /* we can access iface[i-1] here, because
1002 * a few lines above we make sure that mask[0] != 0 */
1003 if (iface[i-1] != '\0')
1004 printf("+");
1005 break;
1006 }
1007 }
1008 }
1009
1010 /* The ip6tables looks up the /etc/protocols. */
print_proto(uint16_t proto,int invert)1011 static void print_proto(uint16_t proto, int invert)
1012 {
1013 if (proto) {
1014 unsigned int i;
1015 const char *invertstr = invert ? " !" : "";
1016
1017 const struct protoent *pent = getprotobynumber(proto);
1018 if (pent) {
1019 printf("%s -p %s",
1020 invertstr, pent->p_name);
1021 return;
1022 }
1023
1024 for (i = 0; xtables_chain_protos[i].name != NULL; ++i)
1025 if (xtables_chain_protos[i].num == proto) {
1026 printf("%s -p %s",
1027 invertstr, xtables_chain_protos[i].name);
1028 return;
1029 }
1030
1031 printf("%s -p %u", invertstr, proto);
1032 }
1033 }
1034
print_match_save(const struct xt_entry_match * e,const struct ip6t_ip6 * ip)1035 static int print_match_save(const struct xt_entry_match *e,
1036 const struct ip6t_ip6 *ip)
1037 {
1038 const struct xtables_match *match =
1039 xtables_find_match(e->u.user.name, XTF_TRY_LOAD, NULL);
1040
1041 if (match) {
1042 printf(" -m %s",
1043 match->alias ? match->alias(e) : e->u.user.name);
1044
1045 /* some matches don't provide a save function */
1046 if (match->save && e->u.user.revision == match->revision)
1047 match->save(ip, e);
1048 else if (match->save)
1049 printf(unsupported_rev);
1050 } else {
1051 if (e->u.match_size) {
1052 fprintf(stderr,
1053 "Can't find library for match `%s'\n",
1054 e->u.user.name);
1055 exit(1);
1056 }
1057 }
1058 return 0;
1059 }
1060
1061 /* Print a given ip including mask if necessary. */
print_ip(const char * prefix,const struct in6_addr * ip,const struct in6_addr * mask,int invert)1062 static void print_ip(const char *prefix, const struct in6_addr *ip,
1063 const struct in6_addr *mask, int invert)
1064 {
1065 char buf[51];
1066 int l = xtables_ip6mask_to_cidr(mask);
1067
1068 if (l == 0 && !invert)
1069 return;
1070
1071 printf("%s %s %s",
1072 invert ? " !" : "",
1073 prefix,
1074 inet_ntop(AF_INET6, ip, buf, sizeof buf));
1075
1076 if (l == -1)
1077 printf("/%s", inet_ntop(AF_INET6, mask, buf, sizeof buf));
1078 else
1079 printf("/%d", l);
1080 }
1081
1082 /* We want this to be readable, so only print out necessary fields.
1083 * Because that's the kind of world I want to live in.
1084 */
print_rule6(const struct ip6t_entry * e,struct xtc_handle * h,const char * chain,int counters)1085 void print_rule6(const struct ip6t_entry *e,
1086 struct xtc_handle *h, const char *chain, int counters)
1087 {
1088 const struct xt_entry_target *t;
1089 const char *target_name;
1090
1091 /* print counters for iptables-save */
1092 if (counters > 0)
1093 printf("[%llu:%llu] ", (unsigned long long)e->counters.pcnt, (unsigned long long)e->counters.bcnt);
1094
1095 /* print chain name */
1096 printf("-A %s", chain);
1097
1098 /* Print IP part. */
1099 print_ip("-s", &(e->ipv6.src), &(e->ipv6.smsk),
1100 e->ipv6.invflags & IP6T_INV_SRCIP);
1101
1102 print_ip("-d", &(e->ipv6.dst), &(e->ipv6.dmsk),
1103 e->ipv6.invflags & IP6T_INV_DSTIP);
1104
1105 print_iface('i', e->ipv6.iniface, e->ipv6.iniface_mask,
1106 e->ipv6.invflags & IP6T_INV_VIA_IN);
1107
1108 print_iface('o', e->ipv6.outiface, e->ipv6.outiface_mask,
1109 e->ipv6.invflags & IP6T_INV_VIA_OUT);
1110
1111 print_proto(e->ipv6.proto, e->ipv6.invflags & XT_INV_PROTO);
1112
1113 #if 0
1114 /* not definied in ipv6
1115 * FIXME: linux/netfilter_ipv6/ip6_tables: IP6T_INV_FRAG why definied? */
1116 if (e->ipv6.flags & IPT_F_FRAG)
1117 printf("%s -f",
1118 e->ipv6.invflags & IP6T_INV_FRAG ? " !" : "");
1119 #endif
1120
1121 if (e->ipv6.flags & IP6T_F_TOS)
1122 printf("%s -? %d",
1123 e->ipv6.invflags & IP6T_INV_TOS ? " !" : "",
1124 e->ipv6.tos);
1125
1126 /* Print matchinfo part */
1127 if (e->target_offset) {
1128 IP6T_MATCH_ITERATE(e, print_match_save, &e->ipv6);
1129 }
1130
1131 /* print counters for iptables -R */
1132 if (counters < 0)
1133 printf(" -c %llu %llu", (unsigned long long)e->counters.pcnt, (unsigned long long)e->counters.bcnt);
1134
1135 /* Print target name and targinfo part */
1136 target_name = ip6tc_get_target(e, h);
1137 t = ip6t_get_target((struct ip6t_entry *)e);
1138 if (t->u.user.name[0]) {
1139 struct xtables_target *target =
1140 xtables_find_target(t->u.user.name, XTF_TRY_LOAD);
1141
1142 if (!target) {
1143 fprintf(stderr, "Can't find library for target `%s'\n",
1144 t->u.user.name);
1145 exit(1);
1146 }
1147
1148 printf(" -j %s", target->alias ? target->alias(t) : target_name);
1149 if (target->save && t->u.user.revision == target->revision)
1150 target->save(&e->ipv6, t);
1151 else if (target->save)
1152 printf(unsupported_rev);
1153 else {
1154 /* If the target size is greater than xt_entry_target
1155 * there is something to be saved, we just don't know
1156 * how to print it */
1157 if (t->u.target_size !=
1158 sizeof(struct xt_entry_target)) {
1159 fprintf(stderr, "Target `%s' is missing "
1160 "save function\n",
1161 t->u.user.name);
1162 exit(1);
1163 }
1164 }
1165 } else if (target_name && (*target_name != '\0'))
1166 #ifdef IP6T_F_GOTO
1167 printf(" -%c %s", e->ipv6.flags & IP6T_F_GOTO ? 'g' : 'j', target_name);
1168 #else
1169 printf(" -j %s", target_name);
1170 #endif
1171
1172 printf("\n");
1173 }
1174
1175 static int
list_rules(const xt_chainlabel chain,int rulenum,int counters,struct xtc_handle * handle)1176 list_rules(const xt_chainlabel chain, int rulenum, int counters,
1177 struct xtc_handle *handle)
1178 {
1179 const char *this = NULL;
1180 int found = 0;
1181
1182 if (counters)
1183 counters = -1; /* iptables -c format */
1184
1185 /* Dump out chain names first,
1186 * thereby preventing dependency conflicts */
1187 if (!rulenum) for (this = ip6tc_first_chain(handle);
1188 this;
1189 this = ip6tc_next_chain(handle)) {
1190 if (chain && strcmp(this, chain) != 0)
1191 continue;
1192
1193 if (ip6tc_builtin(this, handle)) {
1194 struct xt_counters count;
1195 printf("-P %s %s", this, ip6tc_get_policy(this, &count, handle));
1196 if (counters)
1197 printf(" -c %llu %llu", (unsigned long long)count.pcnt, (unsigned long long)count.bcnt);
1198 printf("\n");
1199 } else {
1200 printf("-N %s\n", this);
1201 }
1202 }
1203
1204 for (this = ip6tc_first_chain(handle);
1205 this;
1206 this = ip6tc_next_chain(handle)) {
1207 const struct ip6t_entry *e;
1208 int num = 0;
1209
1210 if (chain && strcmp(this, chain) != 0)
1211 continue;
1212
1213 /* Dump out rules */
1214 e = ip6tc_first_rule(this, handle);
1215 while(e) {
1216 num++;
1217 if (!rulenum || num == rulenum)
1218 print_rule6(e, handle, this, counters);
1219 e = ip6tc_next_rule(e, handle);
1220 }
1221 found = 1;
1222 }
1223
1224 errno = ENOENT;
1225 return found;
1226 }
1227
1228 static struct ip6t_entry *
generate_entry(const struct ip6t_entry * fw,struct xtables_rule_match * matches,struct xt_entry_target * target)1229 generate_entry(const struct ip6t_entry *fw,
1230 struct xtables_rule_match *matches,
1231 struct xt_entry_target *target)
1232 {
1233 unsigned int size;
1234 struct xtables_rule_match *matchp;
1235 struct ip6t_entry *e;
1236
1237 size = sizeof(struct ip6t_entry);
1238 for (matchp = matches; matchp; matchp = matchp->next)
1239 size += matchp->match->m->u.match_size;
1240
1241 e = xtables_malloc(size + target->u.target_size);
1242 *e = *fw;
1243 e->target_offset = size;
1244 e->next_offset = size + target->u.target_size;
1245
1246 size = 0;
1247 for (matchp = matches; matchp; matchp = matchp->next) {
1248 memcpy(e->elems + size, matchp->match->m, matchp->match->m->u.match_size);
1249 size += matchp->match->m->u.match_size;
1250 }
1251 memcpy(e->elems + size, target, target->u.target_size);
1252
1253 return e;
1254 }
1255
command_jump(struct iptables_command_state * cs)1256 static void command_jump(struct iptables_command_state *cs)
1257 {
1258 size_t size;
1259
1260 set_option(&cs->options, OPT_JUMP, &cs->fw6.ipv6.invflags, cs->invert);
1261 cs->jumpto = parse_target(optarg);
1262 /* TRY_LOAD (may be chain name) */
1263 cs->target = xtables_find_target(cs->jumpto, XTF_TRY_LOAD);
1264
1265 if (cs->target == NULL)
1266 return;
1267
1268 size = XT_ALIGN(sizeof(struct xt_entry_target)) + cs->target->size;
1269
1270 cs->target->t = xtables_calloc(1, size);
1271 cs->target->t->u.target_size = size;
1272 if (cs->target->real_name == NULL) {
1273 strcpy(cs->target->t->u.user.name, cs->jumpto);
1274 } else {
1275 strcpy(cs->target->t->u.user.name, cs->target->real_name);
1276 if (!(cs->target->ext_flags & XTABLES_EXT_ALIAS))
1277 fprintf(stderr, "Notice: The %s target is converted into %s target "
1278 "in rule listing and saving.\n",
1279 cs->jumpto, cs->target->real_name);
1280 }
1281 cs->target->t->u.user.revision = cs->target->revision;
1282
1283 xs_init_target(cs->target);
1284 if (cs->target->x6_options != NULL)
1285 opts = xtables_options_xfrm(ip6tables_globals.orig_opts, opts,
1286 cs->target->x6_options,
1287 &cs->target->option_offset);
1288 else
1289 opts = xtables_merge_options(ip6tables_globals.orig_opts, opts,
1290 cs->target->extra_opts,
1291 &cs->target->option_offset);
1292 if (opts == NULL)
1293 xtables_error(OTHER_PROBLEM, "can't alloc memory!");
1294 }
1295
command_match(struct iptables_command_state * cs)1296 static void command_match(struct iptables_command_state *cs)
1297 {
1298 struct xtables_match *m;
1299 size_t size;
1300
1301 if (cs->invert)
1302 xtables_error(PARAMETER_PROBLEM,
1303 "unexpected ! flag before --match");
1304
1305 m = xtables_find_match(optarg, XTF_LOAD_MUST_SUCCEED, &cs->matches);
1306 size = XT_ALIGN(sizeof(struct xt_entry_match)) + m->size;
1307 m->m = xtables_calloc(1, size);
1308 m->m->u.match_size = size;
1309 if (m->real_name == NULL) {
1310 strcpy(m->m->u.user.name, m->name);
1311 } else {
1312 strcpy(m->m->u.user.name, m->real_name);
1313 if (!(m->ext_flags & XTABLES_EXT_ALIAS))
1314 fprintf(stderr, "Notice: The %s match is converted into %s match "
1315 "in rule listing and saving.\n", m->name, m->real_name);
1316 }
1317 m->m->u.user.revision = m->revision;
1318
1319 xs_init_match(m);
1320 if (m == m->next)
1321 return;
1322 /* Merge options for non-cloned matches */
1323 if (m->x6_options != NULL)
1324 opts = xtables_options_xfrm(ip6tables_globals.orig_opts, opts,
1325 m->x6_options, &m->option_offset);
1326 else if (m->extra_opts != NULL)
1327 opts = xtables_merge_options(ip6tables_globals.orig_opts, opts,
1328 m->extra_opts, &m->option_offset);
1329 }
1330
do_command6(int argc,char * argv[],char ** table,struct xtc_handle ** handle,bool restore)1331 int do_command6(int argc, char *argv[], char **table,
1332 struct xtc_handle **handle, bool restore)
1333 {
1334 struct iptables_command_state cs;
1335 struct ip6t_entry *e = NULL;
1336 unsigned int nsaddrs = 0, ndaddrs = 0;
1337 struct in6_addr *saddrs = NULL, *daddrs = NULL;
1338 struct in6_addr *smasks = NULL, *dmasks = NULL;
1339
1340 int verbose = 0;
1341 int wait = 0;
1342 struct timeval wait_interval = {
1343 .tv_sec = 1,
1344 };
1345 bool wait_interval_set = false;
1346 const char *chain = NULL;
1347 const char *shostnetworkmask = NULL, *dhostnetworkmask = NULL;
1348 const char *policy = NULL, *newname = NULL;
1349 unsigned int rulenum = 0, command = 0;
1350 const char *pcnt = NULL, *bcnt = NULL;
1351 int ret = 1;
1352 struct xtables_match *m;
1353 struct xtables_rule_match *matchp;
1354 struct xtables_target *t;
1355 unsigned long long cnt;
1356
1357 memset(&cs, 0, sizeof(cs));
1358 cs.jumpto = "";
1359 cs.argv = argv;
1360
1361 /* re-set optind to 0 in case do_command6 gets called
1362 * a second time */
1363 optind = 0;
1364
1365 /* clear mflags in case do_command6 gets called a second time
1366 * (we clear the global list of all matches for security)*/
1367 for (m = xtables_matches; m; m = m->next)
1368 m->mflags = 0;
1369
1370 for (t = xtables_targets; t; t = t->next) {
1371 t->tflags = 0;
1372 t->used = 0;
1373 }
1374
1375 /* Suppress error messages: we may add new options if we
1376 demand-load a protocol. */
1377 opterr = 0;
1378
1379 opts = xt_params->orig_opts;
1380 while ((cs.c = getopt_long(argc, argv,
1381 "-:A:C:D:R:I:L::S::M:F::Z::N:X::E:P:Vh::o:p:s:d:j:i:bvw::W::nt:m:xc:g:46",
1382 opts, NULL)) != -1) {
1383 switch (cs.c) {
1384 /*
1385 * Command selection
1386 */
1387 case 'A':
1388 add_command(&command, CMD_APPEND, CMD_NONE,
1389 cs.invert);
1390 chain = optarg;
1391 break;
1392
1393 case 'C':
1394 add_command(&command, CMD_CHECK, CMD_NONE,
1395 cs.invert);
1396 chain = optarg;
1397 break;
1398
1399 case 'D':
1400 add_command(&command, CMD_DELETE, CMD_NONE,
1401 cs.invert);
1402 chain = optarg;
1403 if (xs_has_arg(argc, argv)) {
1404 rulenum = parse_rulenumber(argv[optind++]);
1405 command = CMD_DELETE_NUM;
1406 }
1407 break;
1408
1409 case 'R':
1410 add_command(&command, CMD_REPLACE, CMD_NONE,
1411 cs.invert);
1412 chain = optarg;
1413 if (xs_has_arg(argc, argv))
1414 rulenum = parse_rulenumber(argv[optind++]);
1415 else
1416 xtables_error(PARAMETER_PROBLEM,
1417 "-%c requires a rule number",
1418 cmd2char(CMD_REPLACE));
1419 break;
1420
1421 case 'I':
1422 add_command(&command, CMD_INSERT, CMD_NONE,
1423 cs.invert);
1424 chain = optarg;
1425 if (xs_has_arg(argc, argv))
1426 rulenum = parse_rulenumber(argv[optind++]);
1427 else rulenum = 1;
1428 break;
1429
1430 case 'L':
1431 add_command(&command, CMD_LIST,
1432 CMD_ZERO | CMD_ZERO_NUM, cs.invert);
1433 if (optarg) chain = optarg;
1434 else if (xs_has_arg(argc, argv))
1435 chain = argv[optind++];
1436 if (xs_has_arg(argc, argv))
1437 rulenum = parse_rulenumber(argv[optind++]);
1438 break;
1439
1440 case 'S':
1441 add_command(&command, CMD_LIST_RULES,
1442 CMD_ZERO | CMD_ZERO_NUM, cs.invert);
1443 if (optarg) chain = optarg;
1444 else if (xs_has_arg(argc, argv))
1445 chain = argv[optind++];
1446 if (xs_has_arg(argc, argv))
1447 rulenum = parse_rulenumber(argv[optind++]);
1448 break;
1449
1450 case 'F':
1451 add_command(&command, CMD_FLUSH, CMD_NONE,
1452 cs.invert);
1453 if (optarg) chain = optarg;
1454 else if (xs_has_arg(argc, argv))
1455 chain = argv[optind++];
1456 break;
1457
1458 case 'Z':
1459 add_command(&command, CMD_ZERO, CMD_LIST|CMD_LIST_RULES,
1460 cs.invert);
1461 if (optarg) chain = optarg;
1462 else if (xs_has_arg(argc, argv))
1463 chain = argv[optind++];
1464 if (xs_has_arg(argc, argv)) {
1465 rulenum = parse_rulenumber(argv[optind++]);
1466 command = CMD_ZERO_NUM;
1467 }
1468 break;
1469
1470 case 'N':
1471 parse_chain(optarg);
1472 add_command(&command, CMD_NEW_CHAIN, CMD_NONE,
1473 cs.invert);
1474 chain = optarg;
1475 break;
1476
1477 case 'X':
1478 add_command(&command, CMD_DELETE_CHAIN, CMD_NONE,
1479 cs.invert);
1480 if (optarg) chain = optarg;
1481 else if (xs_has_arg(argc, argv))
1482 chain = argv[optind++];
1483 break;
1484
1485 case 'E':
1486 add_command(&command, CMD_RENAME_CHAIN, CMD_NONE,
1487 cs.invert);
1488 chain = optarg;
1489 if (xs_has_arg(argc, argv))
1490 newname = argv[optind++];
1491 else
1492 xtables_error(PARAMETER_PROBLEM,
1493 "-%c requires old-chain-name and "
1494 "new-chain-name",
1495 cmd2char(CMD_RENAME_CHAIN));
1496 break;
1497
1498 case 'P':
1499 add_command(&command, CMD_SET_POLICY, CMD_NONE,
1500 cs.invert);
1501 chain = optarg;
1502 if (xs_has_arg(argc, argv))
1503 policy = argv[optind++];
1504 else
1505 xtables_error(PARAMETER_PROBLEM,
1506 "-%c requires a chain and a policy",
1507 cmd2char(CMD_SET_POLICY));
1508 break;
1509
1510 case 'h':
1511 if (!optarg)
1512 optarg = argv[optind];
1513
1514 /* ip6tables -p icmp -h */
1515 if (!cs.matches && cs.protocol)
1516 xtables_find_match(cs.protocol, XTF_TRY_LOAD,
1517 &cs.matches);
1518
1519 exit_printhelp(cs.matches);
1520
1521 /*
1522 * Option selection
1523 */
1524 case 'p':
1525 set_option(&cs.options, OPT_PROTOCOL, &cs.fw6.ipv6.invflags,
1526 cs.invert);
1527
1528 /* Canonicalize into lower case */
1529 for (cs.protocol = optarg; *cs.protocol; cs.protocol++)
1530 *cs.protocol = tolower(*cs.protocol);
1531
1532 cs.protocol = optarg;
1533 cs.fw6.ipv6.proto = xtables_parse_protocol(cs.protocol);
1534 cs.fw6.ipv6.flags |= IP6T_F_PROTO;
1535
1536 if (cs.fw6.ipv6.proto == 0
1537 && (cs.fw6.ipv6.invflags & XT_INV_PROTO))
1538 xtables_error(PARAMETER_PROBLEM,
1539 "rule would never match protocol");
1540
1541 if (is_exthdr(cs.fw6.ipv6.proto)
1542 && (cs.fw6.ipv6.invflags & XT_INV_PROTO) == 0)
1543 fprintf(stderr,
1544 "Warning: never matched protocol: %s. "
1545 "use extension match instead.\n",
1546 cs.protocol);
1547 break;
1548
1549 case 's':
1550 set_option(&cs.options, OPT_SOURCE, &cs.fw6.ipv6.invflags,
1551 cs.invert);
1552 shostnetworkmask = optarg;
1553 break;
1554
1555 case 'd':
1556 set_option(&cs.options, OPT_DESTINATION, &cs.fw6.ipv6.invflags,
1557 cs.invert);
1558 dhostnetworkmask = optarg;
1559 break;
1560
1561 #ifdef IP6T_F_GOTO
1562 case 'g':
1563 set_option(&cs.options, OPT_JUMP, &cs.fw6.ipv6.invflags,
1564 cs.invert);
1565 cs.fw6.ipv6.flags |= IP6T_F_GOTO;
1566 cs.jumpto = parse_target(optarg);
1567 break;
1568 #endif
1569
1570 case 'j':
1571 command_jump(&cs);
1572 break;
1573
1574
1575 case 'i':
1576 if (*optarg == '\0')
1577 xtables_error(PARAMETER_PROBLEM,
1578 "Empty interface is likely to be "
1579 "undesired");
1580 set_option(&cs.options, OPT_VIANAMEIN, &cs.fw6.ipv6.invflags,
1581 cs.invert);
1582 xtables_parse_interface(optarg,
1583 cs.fw6.ipv6.iniface,
1584 cs.fw6.ipv6.iniface_mask);
1585 break;
1586
1587 case 'o':
1588 if (*optarg == '\0')
1589 xtables_error(PARAMETER_PROBLEM,
1590 "Empty interface is likely to be "
1591 "undesired");
1592 set_option(&cs.options, OPT_VIANAMEOUT, &cs.fw6.ipv6.invflags,
1593 cs.invert);
1594 xtables_parse_interface(optarg,
1595 cs.fw6.ipv6.outiface,
1596 cs.fw6.ipv6.outiface_mask);
1597 break;
1598
1599 case 'v':
1600 if (!verbose)
1601 set_option(&cs.options, OPT_VERBOSE,
1602 &cs.fw6.ipv6.invflags, cs.invert);
1603 verbose++;
1604 break;
1605
1606 case 'w':
1607 if (restore) {
1608 xtables_error(PARAMETER_PROBLEM,
1609 "You cannot use `-w' from "
1610 "ip6tables-restore");
1611 }
1612 wait = parse_wait_time(argc, argv);
1613 break;
1614
1615 case 'W':
1616 if (restore) {
1617 xtables_error(PARAMETER_PROBLEM,
1618 "You cannot use `-W' from "
1619 "ip6tables-restore");
1620 }
1621 parse_wait_interval(argc, argv, &wait_interval);
1622 wait_interval_set = true;
1623 break;
1624
1625 case 'm':
1626 command_match(&cs);
1627 break;
1628
1629 case 'n':
1630 set_option(&cs.options, OPT_NUMERIC, &cs.fw6.ipv6.invflags,
1631 cs.invert);
1632 break;
1633
1634 case 't':
1635 if (cs.invert)
1636 xtables_error(PARAMETER_PROBLEM,
1637 "unexpected ! flag before --table");
1638 *table = optarg;
1639 break;
1640
1641 case 'x':
1642 set_option(&cs.options, OPT_EXPANDED, &cs.fw6.ipv6.invflags,
1643 cs.invert);
1644 break;
1645
1646 case 'V':
1647 if (cs.invert)
1648 printf("Not %s ;-)\n", prog_vers);
1649 else
1650 printf("%s v%s\n",
1651 prog_name, prog_vers);
1652 exit(0);
1653
1654 case '0':
1655 set_option(&cs.options, OPT_LINENUMBERS, &cs.fw6.ipv6.invflags,
1656 cs.invert);
1657 break;
1658
1659 case 'M':
1660 xtables_modprobe_program = optarg;
1661 break;
1662
1663 case 'c':
1664
1665 set_option(&cs.options, OPT_COUNTERS, &cs.fw6.ipv6.invflags,
1666 cs.invert);
1667 pcnt = optarg;
1668 bcnt = strchr(pcnt + 1, ',');
1669 if (bcnt)
1670 bcnt++;
1671 if (!bcnt && xs_has_arg(argc, argv))
1672 bcnt = argv[optind++];
1673 if (!bcnt)
1674 xtables_error(PARAMETER_PROBLEM,
1675 "-%c requires packet and byte counter",
1676 opt2char(OPT_COUNTERS));
1677
1678 if (sscanf(pcnt, "%llu", &cnt) != 1)
1679 xtables_error(PARAMETER_PROBLEM,
1680 "-%c packet counter not numeric",
1681 opt2char(OPT_COUNTERS));
1682 cs.fw6.counters.pcnt = cnt;
1683
1684 if (sscanf(bcnt, "%llu", &cnt) != 1)
1685 xtables_error(PARAMETER_PROBLEM,
1686 "-%c byte counter not numeric",
1687 opt2char(OPT_COUNTERS));
1688 cs.fw6.counters.bcnt = cnt;
1689 break;
1690
1691 case '4':
1692 /* This is not the IPv4 iptables */
1693 if (line != -1)
1694 return 1; /* success: line ignored */
1695 fprintf(stderr, "This is the IPv6 version of ip6tables.\n");
1696 exit_tryhelp(2);
1697
1698 case '6':
1699 /* This is indeed the IPv6 ip6tables */
1700 break;
1701
1702 case 1: /* non option */
1703 if (optarg[0] == '!' && optarg[1] == '\0') {
1704 if (cs.invert)
1705 xtables_error(PARAMETER_PROBLEM,
1706 "multiple consecutive ! not"
1707 " allowed");
1708 cs.invert = TRUE;
1709 optarg[0] = '\0';
1710 continue;
1711 }
1712 fprintf(stderr, "Bad argument `%s'\n", optarg);
1713 exit_tryhelp(2);
1714
1715 default:
1716 if (command_default(&cs, &ip6tables_globals) == 1)
1717 /*
1718 * If new options were loaded, we must retry
1719 * getopt immediately and not allow
1720 * cs.invert=FALSE to be executed.
1721 */
1722 continue;
1723 break;
1724 }
1725 cs.invert = FALSE;
1726 }
1727
1728 if (!wait && wait_interval_set)
1729 xtables_error(PARAMETER_PROBLEM,
1730 "--wait-interval only makes sense with --wait\n");
1731
1732 if (strcmp(*table, "nat") == 0 &&
1733 ((policy != NULL && strcmp(policy, "DROP") == 0) ||
1734 (cs.jumpto != NULL && strcmp(cs.jumpto, "DROP") == 0)))
1735 xtables_error(PARAMETER_PROBLEM,
1736 "\nThe \"nat\" table is not intended for filtering, "
1737 "the use of DROP is therefore inhibited.\n\n");
1738
1739 for (matchp = cs.matches; matchp; matchp = matchp->next)
1740 xtables_option_mfcall(matchp->match);
1741 if (cs.target != NULL)
1742 xtables_option_tfcall(cs.target);
1743
1744 /* Fix me: must put inverse options checking here --MN */
1745
1746 if (optind < argc)
1747 xtables_error(PARAMETER_PROBLEM,
1748 "unknown arguments found on commandline");
1749 if (!command)
1750 xtables_error(PARAMETER_PROBLEM, "no command specified");
1751 if (cs.invert)
1752 xtables_error(PARAMETER_PROBLEM,
1753 "nothing appropriate following !");
1754
1755 if (command & (CMD_REPLACE | CMD_INSERT | CMD_DELETE | CMD_APPEND | CMD_CHECK)) {
1756 if (!(cs.options & OPT_DESTINATION))
1757 dhostnetworkmask = "::0/0";
1758 if (!(cs.options & OPT_SOURCE))
1759 shostnetworkmask = "::0/0";
1760 }
1761
1762 if (shostnetworkmask)
1763 xtables_ip6parse_multiple(shostnetworkmask, &saddrs,
1764 &smasks, &nsaddrs);
1765
1766 if (dhostnetworkmask)
1767 xtables_ip6parse_multiple(dhostnetworkmask, &daddrs,
1768 &dmasks, &ndaddrs);
1769
1770 if ((nsaddrs > 1 || ndaddrs > 1) &&
1771 (cs.fw6.ipv6.invflags & (IP6T_INV_SRCIP | IP6T_INV_DSTIP)))
1772 xtables_error(PARAMETER_PROBLEM, "! not allowed with multiple"
1773 " source or destination IP addresses");
1774
1775 if (command == CMD_REPLACE && (nsaddrs != 1 || ndaddrs != 1))
1776 xtables_error(PARAMETER_PROBLEM, "Replacement rule does not "
1777 "specify a unique address");
1778
1779 generic_opt_check(command, cs.options);
1780
1781 /* Attempt to acquire the xtables lock */
1782 if (!restore)
1783 xtables_lock_or_exit(wait, &wait_interval);
1784
1785 /* only allocate handle if we weren't called with a handle */
1786 if (!*handle)
1787 *handle = ip6tc_init(*table);
1788
1789 /* try to insmod the module if iptc_init failed */
1790 if (!*handle && xtables_load_ko(xtables_modprobe_program, false) != -1)
1791 *handle = ip6tc_init(*table);
1792
1793 if (!*handle)
1794 xtables_error(VERSION_PROBLEM,
1795 "can't initialize ip6tables table `%s': %s",
1796 *table, ip6tc_strerror(errno));
1797
1798 if (command == CMD_APPEND
1799 || command == CMD_DELETE
1800 || command == CMD_CHECK
1801 || command == CMD_INSERT
1802 || command == CMD_REPLACE) {
1803 if (strcmp(chain, "PREROUTING") == 0
1804 || strcmp(chain, "INPUT") == 0) {
1805 /* -o not valid with incoming packets. */
1806 if (cs.options & OPT_VIANAMEOUT)
1807 xtables_error(PARAMETER_PROBLEM,
1808 "Can't use -%c with %s\n",
1809 opt2char(OPT_VIANAMEOUT),
1810 chain);
1811 }
1812
1813 if (strcmp(chain, "POSTROUTING") == 0
1814 || strcmp(chain, "OUTPUT") == 0) {
1815 /* -i not valid with outgoing packets */
1816 if (cs.options & OPT_VIANAMEIN)
1817 xtables_error(PARAMETER_PROBLEM,
1818 "Can't use -%c with %s\n",
1819 opt2char(OPT_VIANAMEIN),
1820 chain);
1821 }
1822
1823 if (cs.target && ip6tc_is_chain(cs.jumpto, *handle)) {
1824 fprintf(stderr,
1825 "Warning: using chain %s, not extension\n",
1826 cs.jumpto);
1827
1828 if (cs.target->t)
1829 free(cs.target->t);
1830
1831 cs.target = NULL;
1832 }
1833
1834 /* If they didn't specify a target, or it's a chain
1835 name, use standard. */
1836 if (!cs.target
1837 && (strlen(cs.jumpto) == 0
1838 || ip6tc_is_chain(cs.jumpto, *handle))) {
1839 size_t size;
1840
1841 cs.target = xtables_find_target(XT_STANDARD_TARGET,
1842 XTF_LOAD_MUST_SUCCEED);
1843
1844 size = sizeof(struct xt_entry_target)
1845 + cs.target->size;
1846 cs.target->t = xtables_calloc(1, size);
1847 cs.target->t->u.target_size = size;
1848 strcpy(cs.target->t->u.user.name, cs.jumpto);
1849 xs_init_target(cs.target);
1850 }
1851
1852 if (!cs.target) {
1853 /* It is no chain, and we can't load a plugin.
1854 * We cannot know if the plugin is corrupt, non
1855 * existent OR if the user just misspelled a
1856 * chain.
1857 */
1858 #ifdef IP6T_F_GOTO
1859 if (cs.fw6.ipv6.flags & IP6T_F_GOTO)
1860 xtables_error(PARAMETER_PROBLEM,
1861 "goto '%s' is not a chain\n",
1862 cs.jumpto);
1863 #endif
1864 xtables_find_target(cs.jumpto, XTF_LOAD_MUST_SUCCEED);
1865 } else {
1866 e = generate_entry(&cs.fw6, cs.matches, cs.target->t);
1867 free(cs.target->t);
1868 }
1869 }
1870
1871 switch (command) {
1872 case CMD_APPEND:
1873 ret = append_entry(chain, e,
1874 nsaddrs, saddrs, smasks,
1875 ndaddrs, daddrs, dmasks,
1876 cs.options&OPT_VERBOSE,
1877 *handle);
1878 break;
1879 case CMD_DELETE:
1880 ret = delete_entry(chain, e,
1881 nsaddrs, saddrs, smasks,
1882 ndaddrs, daddrs, dmasks,
1883 cs.options&OPT_VERBOSE,
1884 *handle, cs.matches, cs.target);
1885 break;
1886 case CMD_DELETE_NUM:
1887 ret = ip6tc_delete_num_entry(chain, rulenum - 1, *handle);
1888 break;
1889 case CMD_CHECK:
1890 ret = check_entry(chain, e,
1891 nsaddrs, saddrs, smasks,
1892 ndaddrs, daddrs, dmasks,
1893 cs.options&OPT_VERBOSE,
1894 *handle, cs.matches, cs.target);
1895 break;
1896 case CMD_REPLACE:
1897 ret = replace_entry(chain, e, rulenum - 1,
1898 saddrs, smasks, daddrs, dmasks,
1899 cs.options&OPT_VERBOSE, *handle);
1900 break;
1901 case CMD_INSERT:
1902 ret = insert_entry(chain, e, rulenum - 1,
1903 nsaddrs, saddrs, smasks,
1904 ndaddrs, daddrs, dmasks,
1905 cs.options&OPT_VERBOSE,
1906 *handle);
1907 break;
1908 case CMD_FLUSH:
1909 ret = flush_entries6(chain, cs.options&OPT_VERBOSE, *handle);
1910 break;
1911 case CMD_ZERO:
1912 ret = zero_entries(chain, cs.options&OPT_VERBOSE, *handle);
1913 break;
1914 case CMD_ZERO_NUM:
1915 ret = ip6tc_zero_counter(chain, rulenum, *handle);
1916 break;
1917 case CMD_LIST:
1918 case CMD_LIST|CMD_ZERO:
1919 case CMD_LIST|CMD_ZERO_NUM:
1920 ret = list_entries(chain,
1921 rulenum,
1922 cs.options&OPT_VERBOSE,
1923 cs.options&OPT_NUMERIC,
1924 cs.options&OPT_EXPANDED,
1925 cs.options&OPT_LINENUMBERS,
1926 *handle);
1927 if (ret && (command & CMD_ZERO))
1928 ret = zero_entries(chain,
1929 cs.options&OPT_VERBOSE, *handle);
1930 if (ret && (command & CMD_ZERO_NUM))
1931 ret = ip6tc_zero_counter(chain, rulenum, *handle);
1932 break;
1933 case CMD_LIST_RULES:
1934 case CMD_LIST_RULES|CMD_ZERO:
1935 case CMD_LIST_RULES|CMD_ZERO_NUM:
1936 ret = list_rules(chain,
1937 rulenum,
1938 cs.options&OPT_VERBOSE,
1939 *handle);
1940 if (ret && (command & CMD_ZERO))
1941 ret = zero_entries(chain,
1942 cs.options&OPT_VERBOSE, *handle);
1943 if (ret && (command & CMD_ZERO_NUM))
1944 ret = ip6tc_zero_counter(chain, rulenum, *handle);
1945 break;
1946 case CMD_NEW_CHAIN:
1947 ret = ip6tc_create_chain(chain, *handle);
1948 break;
1949 case CMD_DELETE_CHAIN:
1950 ret = delete_chain6(chain, cs.options&OPT_VERBOSE, *handle);
1951 break;
1952 case CMD_RENAME_CHAIN:
1953 ret = ip6tc_rename_chain(chain, newname, *handle);
1954 break;
1955 case CMD_SET_POLICY:
1956 ret = ip6tc_set_policy(chain, policy, cs.options&OPT_COUNTERS ? &cs.fw6.counters : NULL, *handle);
1957 break;
1958 default:
1959 /* We should never reach this... */
1960 exit_tryhelp(2);
1961 }
1962
1963 if (verbose > 1)
1964 dump_entries6(*handle);
1965
1966 xtables_rule_matches_free(&cs.matches);
1967
1968 if (e != NULL) {
1969 free(e);
1970 e = NULL;
1971 }
1972
1973 free(saddrs);
1974 free(smasks);
1975 free(daddrs);
1976 free(dmasks);
1977 xtables_free_opts(1);
1978
1979 return ret;
1980 }
1981