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