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 FMT_NUMERIC 0x0001
56 #define FMT_NOCOUNTS 0x0002
57 #define FMT_KILOMEGAGIGA 0x0004
58 #define FMT_OPTIONS 0x0008
59 #define FMT_NOTABLE 0x0010
60 #define FMT_NOTARGET 0x0020
61 #define FMT_VIA 0x0040
62 #define FMT_NONEWLINE 0x0080
63 #define FMT_LINENUMBERS 0x0100
64
65 #define FMT_PRINT_RULE (FMT_NOCOUNTS | FMT_OPTIONS | FMT_VIA \
66 | FMT_NUMERIC | FMT_NOTABLE)
67 #define FMT(tab,notab) ((format) & FMT_NOTABLE ? (notab) : (tab))
68
69
70 #define CMD_NONE 0x0000U
71 #define CMD_INSERT 0x0001U
72 #define CMD_DELETE 0x0002U
73 #define CMD_DELETE_NUM 0x0004U
74 #define CMD_REPLACE 0x0008U
75 #define CMD_APPEND 0x0010U
76 #define CMD_LIST 0x0020U
77 #define CMD_FLUSH 0x0040U
78 #define CMD_ZERO 0x0080U
79 #define CMD_NEW_CHAIN 0x0100U
80 #define CMD_DELETE_CHAIN 0x0200U
81 #define CMD_SET_POLICY 0x0400U
82 #define CMD_RENAME_CHAIN 0x0800U
83 #define CMD_LIST_RULES 0x1000U
84 #define CMD_ZERO_NUM 0x2000U
85 #define CMD_CHECK 0x4000U
86 #define NUMBER_OF_CMD 16
87 static const char cmdflags[] = { 'I', 'D', 'D', 'R', 'A', 'L', 'F', 'Z',
88 'Z', 'N', 'X', 'P', 'E', 'S', 'C' };
89
90 #define NUMBER_OF_OPT ARRAY_SIZE(optflags)
91 static const char optflags[]
92 = { 'n', 's', 'd', 'p', 'j', 'v', 'x', 'i', 'o', '0', 'c'};
93
94 static struct option original_opts[] = {
95 {.name = "append", .has_arg = 1, .val = 'A'},
96 {.name = "delete", .has_arg = 1, .val = 'D'},
97 {.name = "check" , .has_arg = 1, .val = 'C'},
98 {.name = "insert", .has_arg = 1, .val = 'I'},
99 {.name = "replace", .has_arg = 1, .val = 'R'},
100 {.name = "list", .has_arg = 2, .val = 'L'},
101 {.name = "list-rules", .has_arg = 2, .val = 'S'},
102 {.name = "flush", .has_arg = 2, .val = 'F'},
103 {.name = "zero", .has_arg = 2, .val = 'Z'},
104 {.name = "new-chain", .has_arg = 1, .val = 'N'},
105 {.name = "delete-chain", .has_arg = 2, .val = 'X'},
106 {.name = "rename-chain", .has_arg = 1, .val = 'E'},
107 {.name = "policy", .has_arg = 1, .val = 'P'},
108 {.name = "source", .has_arg = 1, .val = 's'},
109 {.name = "destination", .has_arg = 1, .val = 'd'},
110 {.name = "src", .has_arg = 1, .val = 's'}, /* synonym */
111 {.name = "dst", .has_arg = 1, .val = 'd'}, /* synonym */
112 {.name = "protocol", .has_arg = 1, .val = 'p'},
113 {.name = "in-interface", .has_arg = 1, .val = 'i'},
114 {.name = "jump", .has_arg = 1, .val = 'j'},
115 {.name = "table", .has_arg = 1, .val = 't'},
116 {.name = "match", .has_arg = 1, .val = 'm'},
117 {.name = "numeric", .has_arg = 0, .val = 'n'},
118 {.name = "out-interface", .has_arg = 1, .val = 'o'},
119 {.name = "verbose", .has_arg = 0, .val = 'v'},
120 {.name = "exact", .has_arg = 0, .val = 'x'},
121 {.name = "version", .has_arg = 0, .val = 'V'},
122 {.name = "help", .has_arg = 2, .val = 'h'},
123 {.name = "line-numbers", .has_arg = 0, .val = '0'},
124 {.name = "modprobe", .has_arg = 1, .val = 'M'},
125 {.name = "set-counters", .has_arg = 1, .val = 'c'},
126 {.name = "goto", .has_arg = 1, .val = 'g'},
127 {.name = "ipv4", .has_arg = 0, .val = '4'},
128 {.name = "ipv6", .has_arg = 0, .val = '6'},
129 {NULL},
130 };
131
132 void ip6tables_exit_error(enum xtables_exittype status, const char *msg, ...) __attribute__((noreturn, format(printf,2,3)));
133 struct xtables_globals ip6tables_globals = {
134 .option_offset = 0,
135 .program_version = IPTABLES_VERSION,
136 .orig_opts = original_opts,
137 .exit_err = ip6tables_exit_error,
138 };
139
140 /* Table of legal combinations of commands and options. If any of the
141 * given commands make an option legal, that option is legal (applies to
142 * CMD_LIST and CMD_ZERO only).
143 * Key:
144 * + compulsory
145 * x illegal
146 * optional
147 */
148
149 static const char commands_v_options[NUMBER_OF_CMD][NUMBER_OF_OPT] =
150 /* Well, it's better than "Re: Linux vs FreeBSD" */
151 {
152 /* -n -s -d -p -j -v -x -i -o --line -c */
153 /*INSERT*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x',' '},
154 /*DELETE*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x','x'},
155 /*DELETE_NUM*/{'x','x','x','x','x',' ','x','x','x','x','x'},
156 /*REPLACE*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x',' '},
157 /*APPEND*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x',' '},
158 /*LIST*/ {' ','x','x','x','x',' ',' ','x','x',' ','x'},
159 /*FLUSH*/ {'x','x','x','x','x',' ','x','x','x','x','x'},
160 /*ZERO*/ {'x','x','x','x','x',' ','x','x','x','x','x'},
161 /*ZERO_NUM*/ {'x','x','x','x','x',' ','x','x','x','x','x'},
162 /*NEW_CHAIN*/ {'x','x','x','x','x',' ','x','x','x','x','x'},
163 /*DEL_CHAIN*/ {'x','x','x','x','x',' ','x','x','x','x','x'},
164 /*SET_POLICY*/{'x','x','x','x','x',' ','x','x','x','x',' '},
165 /*RENAME*/ {'x','x','x','x','x',' ','x','x','x','x','x'},
166 /*LIST_RULES*/{'x','x','x','x','x',' ','x','x','x','x','x'},
167 /*CHECK*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x','x'},
168 };
169
170 static const unsigned int inverse_for_options[NUMBER_OF_OPT] =
171 {
172 /* -n */ 0,
173 /* -s */ IP6T_INV_SRCIP,
174 /* -d */ IP6T_INV_DSTIP,
175 /* -p */ IP6T_INV_PROTO,
176 /* -j */ 0,
177 /* -v */ 0,
178 /* -x */ 0,
179 /* -i */ IP6T_INV_VIA_IN,
180 /* -o */ IP6T_INV_VIA_OUT,
181 /*--line*/ 0,
182 /* -c */ 0,
183 };
184
185 #define opts ip6tables_globals.opts
186 #define prog_name ip6tables_globals.program_name
187 #define prog_vers ip6tables_globals.program_version
188 /* A few hardcoded protocols for 'all' and in case the user has no
189 /etc/protocols */
190 struct pprot {
191 const char *name;
192 uint8_t num;
193 };
194
195 static void __attribute__((noreturn))
exit_tryhelp(int status)196 exit_tryhelp(int status)
197 {
198 if (line != -1)
199 fprintf(stderr, "Error occurred at line: %d\n", line);
200 fprintf(stderr, "Try `%s -h' or '%s --help' for more information.\n",
201 prog_name, prog_name);
202 xtables_free_opts(1);
203 exit(status);
204 }
205
206 static void
exit_printhelp(const struct xtables_rule_match * matches)207 exit_printhelp(const struct xtables_rule_match *matches)
208 {
209 printf("%s v%s\n\n"
210 "Usage: %s -[ACD] chain rule-specification [options]\n"
211 " %s -I chain [rulenum] rule-specification [options]\n"
212 " %s -R chain rulenum rule-specification [options]\n"
213 " %s -D chain rulenum [options]\n"
214 " %s -[LS] [chain [rulenum]] [options]\n"
215 " %s -[FZ] [chain] [options]\n"
216 " %s -[NX] chain\n"
217 " %s -E old-chain-name new-chain-name\n"
218 " %s -P chain target [options]\n"
219 " %s -h (print this help information)\n\n",
220 prog_name, prog_vers, prog_name, prog_name,
221 prog_name, prog_name, prog_name, prog_name,
222 prog_name, prog_name, prog_name, prog_name);
223
224 printf(
225 "Commands:\n"
226 "Either long or short options are allowed.\n"
227 " --append -A chain Append to chain\n"
228 " --check -C chain Check for the existence of a rule\n"
229 " --delete -D chain Delete matching rule from chain\n"
230 " --delete -D chain rulenum\n"
231 " Delete rule rulenum (1 = first) from chain\n"
232 " --insert -I chain [rulenum]\n"
233 " Insert in chain as rulenum (default 1=first)\n"
234 " --replace -R chain rulenum\n"
235 " Replace rule rulenum (1 = first) in chain\n"
236 " --list -L [chain [rulenum]]\n"
237 " List the rules in a chain or all chains\n"
238 " --list-rules -S [chain [rulenum]]\n"
239 " Print the rules in a chain or all chains\n"
240 " --flush -F [chain] Delete all rules in chain or all chains\n"
241 " --zero -Z [chain [rulenum]]\n"
242 " Zero counters in chain or all chains\n"
243 " --new -N chain Create a new user-defined chain\n"
244 " --delete-chain\n"
245 " -X [chain] Delete a user-defined chain\n"
246 " --policy -P chain target\n"
247 " Change policy on chain to target\n"
248 " --rename-chain\n"
249 " -E old-chain new-chain\n"
250 " Change chain name, (moving any references)\n"
251
252 "Options:\n"
253 " --ipv4 -4 Error (line is ignored by ip6tables-restore)\n"
254 " --ipv6 -6 Nothing (line is ignored by iptables-restore)\n"
255 "[!] --proto -p proto protocol: by number or name, eg. `tcp'\n"
256 "[!] --source -s address[/mask][,...]\n"
257 " source specification\n"
258 "[!] --destination -d address[/mask][,...]\n"
259 " destination specification\n"
260 "[!] --in-interface -i input name[+]\n"
261 " network interface name ([+] for wildcard)\n"
262 " --jump -j target\n"
263 " target for rule (may load target extension)\n"
264 #ifdef IP6T_F_GOTO
265 " --goto -g chain\n"
266 " jump to chain with no return\n"
267 #endif
268 " --match -m match\n"
269 " extended match (may load extension)\n"
270 " --numeric -n numeric output of addresses and ports\n"
271 "[!] --out-interface -o output name[+]\n"
272 " network interface name ([+] for wildcard)\n"
273 " --table -t table table to manipulate (default: `filter')\n"
274 " --verbose -v verbose mode\n"
275 " --line-numbers print line numbers when listing\n"
276 " --exact -x expand numbers (display exact values)\n"
277 /*"[!] --fragment -f match second or further fragments only\n"*/
278 " --modprobe=<command> try to insert modules using this command\n"
279 " --set-counters PKTS BYTES set the counter during insert/append\n"
280 "[!] --version -V print package version.\n");
281
282 print_extension_helps(xtables_targets, matches);
283 exit(0);
284 }
285
286 void
ip6tables_exit_error(enum xtables_exittype status,const char * msg,...)287 ip6tables_exit_error(enum xtables_exittype status, const char *msg, ...)
288 {
289 va_list args;
290
291 va_start(args, msg);
292 fprintf(stderr, "%s v%s: ", prog_name, prog_vers);
293 vfprintf(stderr, msg, args);
294 va_end(args);
295 fprintf(stderr, "\n");
296 if (status == PARAMETER_PROBLEM)
297 exit_tryhelp(status);
298 if (status == VERSION_PROBLEM)
299 fprintf(stderr,
300 "Perhaps ip6tables or your kernel needs to be upgraded.\n");
301 /* On error paths, make sure that we don't leak memory */
302 xtables_free_opts(1);
303 exit(status);
304 }
305
306 static void
generic_opt_check(int command,int options)307 generic_opt_check(int command, int options)
308 {
309 int i, j, legal = 0;
310
311 /* Check that commands are valid with options. Complicated by the
312 * fact that if an option is legal with *any* command given, it is
313 * legal overall (ie. -z and -l).
314 */
315 for (i = 0; i < NUMBER_OF_OPT; i++) {
316 legal = 0; /* -1 => illegal, 1 => legal, 0 => undecided. */
317
318 for (j = 0; j < NUMBER_OF_CMD; j++) {
319 if (!(command & (1<<j)))
320 continue;
321
322 if (!(options & (1<<i))) {
323 if (commands_v_options[j][i] == '+')
324 xtables_error(PARAMETER_PROBLEM,
325 "You need to supply the `-%c' "
326 "option for this command\n",
327 optflags[i]);
328 } else {
329 if (commands_v_options[j][i] != 'x')
330 legal = 1;
331 else if (legal == 0)
332 legal = -1;
333 }
334 }
335 if (legal == -1)
336 xtables_error(PARAMETER_PROBLEM,
337 "Illegal option `-%c' with this command\n",
338 optflags[i]);
339 }
340 }
341
342 static char
opt2char(int option)343 opt2char(int option)
344 {
345 const char *ptr;
346 for (ptr = optflags; option > 1; option >>= 1, ptr++);
347
348 return *ptr;
349 }
350
351 static char
cmd2char(int option)352 cmd2char(int option)
353 {
354 const char *ptr;
355 for (ptr = cmdflags; option > 1; option >>= 1, ptr++);
356
357 return *ptr;
358 }
359
360 static void
add_command(unsigned int * cmd,const int newcmd,const int othercmds,int invert)361 add_command(unsigned int *cmd, const int newcmd, const int othercmds,
362 int invert)
363 {
364 if (invert)
365 xtables_error(PARAMETER_PROBLEM, "unexpected '!' flag");
366 if (*cmd & (~othercmds))
367 xtables_error(PARAMETER_PROBLEM, "Cannot use -%c with -%c\n",
368 cmd2char(newcmd), cmd2char(*cmd & (~othercmds)));
369 *cmd |= newcmd;
370 }
371
372 /*
373 * All functions starting with "parse" should succeed, otherwise
374 * the program fails.
375 * Most routines return pointers to static data that may change
376 * between calls to the same or other routines with a few exceptions:
377 * "host_to_addr", "parse_hostnetwork", and "parse_hostnetworkmask"
378 * return global static data.
379 */
380
381 /* These are invalid numbers as upper layer protocol */
is_exthdr(uint16_t proto)382 static int is_exthdr(uint16_t proto)
383 {
384 return (proto == IPPROTO_ROUTING ||
385 proto == IPPROTO_FRAGMENT ||
386 proto == IPPROTO_AH ||
387 proto == IPPROTO_DSTOPTS);
388 }
389
390 /* Can't be zero. */
391 static int
parse_rulenumber(const char * rule)392 parse_rulenumber(const char *rule)
393 {
394 unsigned int rulenum;
395
396 if (!xtables_strtoui(rule, NULL, &rulenum, 1, INT_MAX))
397 xtables_error(PARAMETER_PROBLEM,
398 "Invalid rule number `%s'", rule);
399
400 return rulenum;
401 }
402
403 static const char *
parse_target(const char * targetname)404 parse_target(const char *targetname)
405 {
406 const char *ptr;
407
408 if (strlen(targetname) < 1)
409 xtables_error(PARAMETER_PROBLEM,
410 "Invalid target name (too short)");
411
412 if (strlen(targetname) >= XT_EXTENSION_MAXNAMELEN)
413 xtables_error(PARAMETER_PROBLEM,
414 "Invalid target name `%s' (%u chars max)",
415 targetname, XT_EXTENSION_MAXNAMELEN - 1);
416
417 for (ptr = targetname; *ptr; ptr++)
418 if (isspace(*ptr))
419 xtables_error(PARAMETER_PROBLEM,
420 "Invalid target name `%s'", targetname);
421 return targetname;
422 }
423
424 static void
set_option(unsigned int * options,unsigned int option,uint8_t * invflg,int invert)425 set_option(unsigned int *options, unsigned int option, uint8_t *invflg,
426 int invert)
427 {
428 if (*options & option)
429 xtables_error(PARAMETER_PROBLEM, "multiple -%c flags not allowed",
430 opt2char(option));
431 *options |= option;
432
433 if (invert) {
434 unsigned int i;
435 for (i = 0; 1 << i != option; i++);
436
437 if (!inverse_for_options[i])
438 xtables_error(PARAMETER_PROBLEM,
439 "cannot have ! before -%c",
440 opt2char(option));
441 *invflg |= inverse_for_options[i];
442 }
443 }
444
445 static void
print_num(uint64_t number,unsigned int format)446 print_num(uint64_t number, unsigned int format)
447 {
448 if (format & FMT_KILOMEGAGIGA) {
449 if (number > 99999) {
450 number = (number + 500) / 1000;
451 if (number > 9999) {
452 number = (number + 500) / 1000;
453 if (number > 9999) {
454 number = (number + 500) / 1000;
455 if (number > 9999) {
456 number = (number + 500) / 1000;
457 printf(FMT("%4lluT ","%lluT "), (unsigned long long)number);
458 }
459 else printf(FMT("%4lluG ","%lluG "), (unsigned long long)number);
460 }
461 else printf(FMT("%4lluM ","%lluM "), (unsigned long long)number);
462 } else
463 printf(FMT("%4lluK ","%lluK "), (unsigned long long)number);
464 } else
465 printf(FMT("%5llu ","%llu "), (unsigned long long)number);
466 } else
467 printf(FMT("%8llu ","%llu "), (unsigned long long)number);
468 }
469
470
471 static void
print_header(unsigned int format,const char * chain,struct ip6tc_handle * handle)472 print_header(unsigned int format, const char *chain, struct ip6tc_handle *handle)
473 {
474 struct ip6t_counters counters;
475 const char *pol = ip6tc_get_policy(chain, &counters, handle);
476 printf("Chain %s", chain);
477 if (pol) {
478 printf(" (policy %s", pol);
479 if (!(format & FMT_NOCOUNTS)) {
480 fputc(' ', stdout);
481 print_num(counters.pcnt, (format|FMT_NOTABLE));
482 fputs("packets, ", stdout);
483 print_num(counters.bcnt, (format|FMT_NOTABLE));
484 fputs("bytes", stdout);
485 }
486 printf(")\n");
487 } else {
488 unsigned int refs;
489 if (!ip6tc_get_references(&refs, chain, handle))
490 printf(" (ERROR obtaining refs)\n");
491 else
492 printf(" (%u references)\n", refs);
493 }
494
495 if (format & FMT_LINENUMBERS)
496 printf(FMT("%-4s ", "%s "), "num");
497 if (!(format & FMT_NOCOUNTS)) {
498 if (format & FMT_KILOMEGAGIGA) {
499 printf(FMT("%5s ","%s "), "pkts");
500 printf(FMT("%5s ","%s "), "bytes");
501 } else {
502 printf(FMT("%8s ","%s "), "pkts");
503 printf(FMT("%10s ","%s "), "bytes");
504 }
505 }
506 if (!(format & FMT_NOTARGET))
507 printf(FMT("%-9s ","%s "), "target");
508 fputs(" prot ", stdout);
509 if (format & FMT_OPTIONS)
510 fputs("opt", stdout);
511 if (format & FMT_VIA) {
512 printf(FMT(" %-6s ","%s "), "in");
513 printf(FMT("%-6s ","%s "), "out");
514 }
515 printf(FMT(" %-19s ","%s "), "source");
516 printf(FMT(" %-19s "," %s "), "destination");
517 printf("\n");
518 }
519
520
521 static int
print_match(const struct ip6t_entry_match * m,const struct ip6t_ip6 * ip,int numeric)522 print_match(const struct ip6t_entry_match *m,
523 const struct ip6t_ip6 *ip,
524 int numeric)
525 {
526 const struct xtables_match *match =
527 xtables_find_match(m->u.user.name, XTF_TRY_LOAD, NULL);
528
529 if (match) {
530 if (match->print)
531 match->print(ip, m, numeric);
532 else
533 printf("%s ", match->name);
534 } else {
535 if (m->u.user.name[0])
536 printf("UNKNOWN match `%s' ", m->u.user.name);
537 }
538 /* Don't stop iterating. */
539 return 0;
540 }
541
542 /* e is called `fw' here for historical reasons */
543 static void
print_firewall(const struct ip6t_entry * fw,const char * targname,unsigned int num,unsigned int format,struct ip6tc_handle * const handle)544 print_firewall(const struct ip6t_entry *fw,
545 const char *targname,
546 unsigned int num,
547 unsigned int format,
548 struct ip6tc_handle *const handle)
549 {
550 const struct xtables_target *target = NULL;
551 const struct ip6t_entry_target *t;
552 char buf[BUFSIZ];
553
554 if (!ip6tc_is_chain(targname, handle))
555 target = xtables_find_target(targname, XTF_TRY_LOAD);
556 else
557 target = xtables_find_target(IP6T_STANDARD_TARGET,
558 XTF_LOAD_MUST_SUCCEED);
559
560 t = ip6t_get_target((struct ip6t_entry *)fw);
561
562 if (format & FMT_LINENUMBERS)
563 printf(FMT("%-4u ", "%u "), num);
564
565 if (!(format & FMT_NOCOUNTS)) {
566 print_num(fw->counters.pcnt, format);
567 print_num(fw->counters.bcnt, format);
568 }
569
570 if (!(format & FMT_NOTARGET))
571 printf(FMT("%-9s ", "%s "), targname);
572
573 fputc(fw->ipv6.invflags & IP6T_INV_PROTO ? '!' : ' ', stdout);
574 {
575 const char *pname = proto_to_name(fw->ipv6.proto, format&FMT_NUMERIC);
576 if (pname)
577 printf(FMT("%-5s", "%s "), pname);
578 else
579 printf(FMT("%-5hu", "%hu "), fw->ipv6.proto);
580 }
581
582 if (format & FMT_OPTIONS) {
583 if (format & FMT_NOTABLE)
584 fputs("opt ", stdout);
585 fputc(' ', stdout); /* Invert flag of FRAG */
586 fputc(' ', stdout); /* -f */
587 fputc(' ', stdout);
588 }
589
590 if (format & FMT_VIA) {
591 char iface[IFNAMSIZ+2];
592
593 if (fw->ipv6.invflags & IP6T_INV_VIA_IN) {
594 iface[0] = '!';
595 iface[1] = '\0';
596 }
597 else iface[0] = '\0';
598
599 if (fw->ipv6.iniface[0] != '\0') {
600 strcat(iface, fw->ipv6.iniface);
601 }
602 else if (format & FMT_NUMERIC) strcat(iface, "*");
603 else strcat(iface, "any");
604 printf(FMT(" %-6s ","in %s "), iface);
605
606 if (fw->ipv6.invflags & IP6T_INV_VIA_OUT) {
607 iface[0] = '!';
608 iface[1] = '\0';
609 }
610 else iface[0] = '\0';
611
612 if (fw->ipv6.outiface[0] != '\0') {
613 strcat(iface, fw->ipv6.outiface);
614 }
615 else if (format & FMT_NUMERIC) strcat(iface, "*");
616 else strcat(iface, "any");
617 printf(FMT("%-6s ","out %s "), iface);
618 }
619
620 fputc(fw->ipv6.invflags & IP6T_INV_SRCIP ? '!' : ' ', stdout);
621 if (!memcmp(&fw->ipv6.smsk, &in6addr_any, sizeof in6addr_any)
622 && !(format & FMT_NUMERIC))
623 printf(FMT("%-19s ","%s "), "anywhere");
624 else {
625 if (format & FMT_NUMERIC)
626 strcpy(buf, xtables_ip6addr_to_numeric(&fw->ipv6.src));
627 else
628 strcpy(buf, xtables_ip6addr_to_anyname(&fw->ipv6.src));
629 strcat(buf, xtables_ip6mask_to_numeric(&fw->ipv6.smsk));
630 printf(FMT("%-19s ","%s "), buf);
631 }
632
633 fputc(fw->ipv6.invflags & IP6T_INV_DSTIP ? '!' : ' ', stdout);
634 if (!memcmp(&fw->ipv6.dmsk, &in6addr_any, sizeof in6addr_any)
635 && !(format & FMT_NUMERIC))
636 printf(FMT("%-19s ","-> %s"), "anywhere");
637 else {
638 if (format & FMT_NUMERIC)
639 strcpy(buf, xtables_ip6addr_to_numeric(&fw->ipv6.dst));
640 else
641 strcpy(buf, xtables_ip6addr_to_anyname(&fw->ipv6.dst));
642 strcat(buf, xtables_ip6mask_to_numeric(&fw->ipv6.dmsk));
643 printf(FMT("%-19s ","-> %s"), buf);
644 }
645
646 if (format & FMT_NOTABLE)
647 fputs(" ", stdout);
648
649 #ifdef IP6T_F_GOTO
650 if(fw->ipv6.flags & IP6T_F_GOTO)
651 printf("[goto] ");
652 #endif
653
654 IP6T_MATCH_ITERATE(fw, print_match, &fw->ipv6, format & FMT_NUMERIC);
655
656 if (target) {
657 if (target->print)
658 /* Print the target information. */
659 target->print(&fw->ipv6, t, format & FMT_NUMERIC);
660 } else if (t->u.target_size != sizeof(*t))
661 printf("[%u bytes of unknown target data] ",
662 (unsigned int)(t->u.target_size - sizeof(*t)));
663
664 if (!(format & FMT_NONEWLINE))
665 fputc('\n', stdout);
666 }
667
668 static void
print_firewall_line(const struct ip6t_entry * fw,struct ip6tc_handle * const h)669 print_firewall_line(const struct ip6t_entry *fw,
670 struct ip6tc_handle *const h)
671 {
672 struct ip6t_entry_target *t;
673
674 t = ip6t_get_target((struct ip6t_entry *)fw);
675 print_firewall(fw, t->u.user.name, 0, FMT_PRINT_RULE, h);
676 }
677
678 static int
append_entry(const ip6t_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 ip6tc_handle * handle)679 append_entry(const ip6t_chainlabel chain,
680 struct ip6t_entry *fw,
681 unsigned int nsaddrs,
682 const struct in6_addr saddrs[],
683 const struct in6_addr smasks[],
684 unsigned int ndaddrs,
685 const struct in6_addr daddrs[],
686 const struct in6_addr dmasks[],
687 int verbose,
688 struct ip6tc_handle *handle)
689 {
690 unsigned int i, j;
691 int ret = 1;
692
693 for (i = 0; i < nsaddrs; i++) {
694 fw->ipv6.src = saddrs[i];
695 fw->ipv6.smsk = smasks[i];
696 for (j = 0; j < ndaddrs; j++) {
697 fw->ipv6.dst = daddrs[j];
698 fw->ipv6.dmsk = dmasks[j];
699 if (verbose)
700 print_firewall_line(fw, handle);
701 ret &= ip6tc_append_entry(chain, fw, handle);
702 }
703 }
704
705 return ret;
706 }
707
708 static int
replace_entry(const ip6t_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 ip6tc_handle * handle)709 replace_entry(const ip6t_chainlabel chain,
710 struct ip6t_entry *fw,
711 unsigned int rulenum,
712 const struct in6_addr *saddr, const struct in6_addr *smask,
713 const struct in6_addr *daddr, const struct in6_addr *dmask,
714 int verbose,
715 struct ip6tc_handle *handle)
716 {
717 fw->ipv6.src = *saddr;
718 fw->ipv6.dst = *daddr;
719 fw->ipv6.smsk = *smask;
720 fw->ipv6.dmsk = *dmask;
721
722 if (verbose)
723 print_firewall_line(fw, handle);
724 return ip6tc_replace_entry(chain, fw, rulenum, handle);
725 }
726
727 static int
insert_entry(const ip6t_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 ip6tc_handle * handle)728 insert_entry(const ip6t_chainlabel chain,
729 struct ip6t_entry *fw,
730 unsigned int rulenum,
731 unsigned int nsaddrs,
732 const struct in6_addr saddrs[],
733 const struct in6_addr smasks[],
734 unsigned int ndaddrs,
735 const struct in6_addr daddrs[],
736 const struct in6_addr dmasks[],
737 int verbose,
738 struct ip6tc_handle *handle)
739 {
740 unsigned int i, j;
741 int ret = 1;
742
743 for (i = 0; i < nsaddrs; i++) {
744 fw->ipv6.src = saddrs[i];
745 fw->ipv6.smsk = smasks[i];
746 for (j = 0; j < ndaddrs; j++) {
747 fw->ipv6.dst = daddrs[j];
748 fw->ipv6.dmsk = dmasks[j];
749 if (verbose)
750 print_firewall_line(fw, handle);
751 ret &= ip6tc_insert_entry(chain, fw, rulenum, handle);
752 }
753 }
754
755 return ret;
756 }
757
758 static unsigned char *
make_delete_mask(const struct xtables_rule_match * matches,const struct xtables_target * target)759 make_delete_mask(const struct xtables_rule_match *matches,
760 const struct xtables_target *target)
761 {
762 /* Establish mask for comparison */
763 unsigned int size;
764 const struct xtables_rule_match *matchp;
765 unsigned char *mask, *mptr;
766
767 size = sizeof(struct ip6t_entry);
768 for (matchp = matches; matchp; matchp = matchp->next)
769 size += XT_ALIGN(sizeof(struct ip6t_entry_match)) + matchp->match->size;
770
771 mask = xtables_calloc(1, size
772 + XT_ALIGN(sizeof(struct ip6t_entry_target))
773 + target->size);
774
775 memset(mask, 0xFF, sizeof(struct ip6t_entry));
776 mptr = mask + sizeof(struct ip6t_entry);
777
778 for (matchp = matches; matchp; matchp = matchp->next) {
779 memset(mptr, 0xFF,
780 XT_ALIGN(sizeof(struct ip6t_entry_match))
781 + matchp->match->userspacesize);
782 mptr += XT_ALIGN(sizeof(struct ip6t_entry_match)) + matchp->match->size;
783 }
784
785 memset(mptr, 0xFF,
786 XT_ALIGN(sizeof(struct ip6t_entry_target))
787 + target->userspacesize);
788
789 return mask;
790 }
791
792 static int
delete_entry(const ip6t_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 ip6tc_handle * handle,struct xtables_rule_match * matches,const struct xtables_target * target)793 delete_entry(const ip6t_chainlabel chain,
794 struct ip6t_entry *fw,
795 unsigned int nsaddrs,
796 const struct in6_addr saddrs[],
797 const struct in6_addr smasks[],
798 unsigned int ndaddrs,
799 const struct in6_addr daddrs[],
800 const struct in6_addr dmasks[],
801 int verbose,
802 struct ip6tc_handle *handle,
803 struct xtables_rule_match *matches,
804 const struct xtables_target *target)
805 {
806 unsigned int i, j;
807 int ret = 1;
808 unsigned char *mask;
809
810 mask = make_delete_mask(matches, target);
811 for (i = 0; i < nsaddrs; i++) {
812 fw->ipv6.src = saddrs[i];
813 fw->ipv6.smsk = smasks[i];
814 for (j = 0; j < ndaddrs; j++) {
815 fw->ipv6.dst = daddrs[j];
816 fw->ipv6.dmsk = dmasks[j];
817 if (verbose)
818 print_firewall_line(fw, handle);
819 ret &= ip6tc_delete_entry(chain, fw, mask, handle);
820 }
821 }
822 free(mask);
823
824 return ret;
825 }
826
827 static int
check_entry(const ip6t_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 ip6tc_handle * handle,struct xtables_rule_match * matches,const struct xtables_target * target)828 check_entry(const ip6t_chainlabel chain, struct ip6t_entry *fw,
829 unsigned int nsaddrs, const struct in6_addr *saddrs,
830 const struct in6_addr *smasks, unsigned int ndaddrs,
831 const struct in6_addr *daddrs, const struct in6_addr *dmasks,
832 bool verbose, struct ip6tc_handle *handle,
833 struct xtables_rule_match *matches,
834 const struct xtables_target *target)
835 {
836 unsigned int i, j;
837 int ret = 1;
838 unsigned char *mask;
839
840 mask = make_delete_mask(matches, target);
841 for (i = 0; i < nsaddrs; i++) {
842 fw->ipv6.src = saddrs[i];
843 fw->ipv6.smsk = smasks[i];
844 for (j = 0; j < ndaddrs; j++) {
845 fw->ipv6.dst = daddrs[j];
846 fw->ipv6.dmsk = dmasks[j];
847 if (verbose)
848 print_firewall_line(fw, handle);
849 ret &= ip6tc_check_entry(chain, fw, mask, handle);
850 }
851 }
852
853 free(mask);
854 return ret;
855 }
856
857 int
for_each_chain6(int (* fn)(const ip6t_chainlabel,int,struct ip6tc_handle *),int verbose,int builtinstoo,struct ip6tc_handle * handle)858 for_each_chain6(int (*fn)(const ip6t_chainlabel, int, struct ip6tc_handle *),
859 int verbose, int builtinstoo, struct ip6tc_handle *handle)
860 {
861 int ret = 1;
862 const char *chain;
863 char *chains;
864 unsigned int i, chaincount = 0;
865
866 chain = ip6tc_first_chain(handle);
867 while (chain) {
868 chaincount++;
869 chain = ip6tc_next_chain(handle);
870 }
871
872 chains = xtables_malloc(sizeof(ip6t_chainlabel) * chaincount);
873 i = 0;
874 chain = ip6tc_first_chain(handle);
875 while (chain) {
876 strcpy(chains + i*sizeof(ip6t_chainlabel), chain);
877 i++;
878 chain = ip6tc_next_chain(handle);
879 }
880
881 for (i = 0; i < chaincount; i++) {
882 if (!builtinstoo
883 && ip6tc_builtin(chains + i*sizeof(ip6t_chainlabel),
884 handle) == 1)
885 continue;
886 ret &= fn(chains + i*sizeof(ip6t_chainlabel), verbose, handle);
887 }
888
889 free(chains);
890 return ret;
891 }
892
893 int
flush_entries6(const ip6t_chainlabel chain,int verbose,struct ip6tc_handle * handle)894 flush_entries6(const ip6t_chainlabel chain, int verbose,
895 struct ip6tc_handle *handle)
896 {
897 if (!chain)
898 return for_each_chain6(flush_entries6, verbose, 1, handle);
899
900 if (verbose)
901 fprintf(stdout, "Flushing chain `%s'\n", chain);
902 return ip6tc_flush_entries(chain, handle);
903 }
904
905 static int
zero_entries(const ip6t_chainlabel chain,int verbose,struct ip6tc_handle * handle)906 zero_entries(const ip6t_chainlabel chain, int verbose,
907 struct ip6tc_handle *handle)
908 {
909 if (!chain)
910 return for_each_chain6(zero_entries, verbose, 1, handle);
911
912 if (verbose)
913 fprintf(stdout, "Zeroing chain `%s'\n", chain);
914 return ip6tc_zero_entries(chain, handle);
915 }
916
917 int
delete_chain6(const ip6t_chainlabel chain,int verbose,struct ip6tc_handle * handle)918 delete_chain6(const ip6t_chainlabel chain, int verbose,
919 struct ip6tc_handle *handle)
920 {
921 if (!chain)
922 return for_each_chain6(delete_chain6, verbose, 0, handle);
923
924 if (verbose)
925 fprintf(stdout, "Deleting chain `%s'\n", chain);
926 return ip6tc_delete_chain(chain, handle);
927 }
928
929 static int
list_entries(const ip6t_chainlabel chain,int rulenum,int verbose,int numeric,int expanded,int linenumbers,struct ip6tc_handle * handle)930 list_entries(const ip6t_chainlabel chain, int rulenum, int verbose, int numeric,
931 int expanded, int linenumbers, struct ip6tc_handle *handle)
932 {
933 int found = 0;
934 unsigned int format;
935 const char *this;
936
937 format = FMT_OPTIONS;
938 if (!verbose)
939 format |= FMT_NOCOUNTS;
940 else
941 format |= FMT_VIA;
942
943 if (numeric)
944 format |= FMT_NUMERIC;
945
946 if (!expanded)
947 format |= FMT_KILOMEGAGIGA;
948
949 if (linenumbers)
950 format |= FMT_LINENUMBERS;
951
952 for (this = ip6tc_first_chain(handle);
953 this;
954 this = ip6tc_next_chain(handle)) {
955 const struct ip6t_entry *i;
956 unsigned int num;
957
958 if (chain && strcmp(chain, this) != 0)
959 continue;
960
961 if (found) printf("\n");
962
963 if (!rulenum)
964 print_header(format, this, handle);
965 i = ip6tc_first_rule(this, handle);
966
967 num = 0;
968 while (i) {
969 num++;
970 if (!rulenum || num == rulenum)
971 print_firewall(i,
972 ip6tc_get_target(i, handle),
973 num,
974 format,
975 handle);
976 i = ip6tc_next_rule(i, handle);
977 }
978 found = 1;
979 }
980
981 errno = ENOENT;
982 return found;
983 }
984
985 /* This assumes that mask is contiguous, and byte-bounded. */
986 static void
print_iface(char letter,const char * iface,const unsigned char * mask,int invert)987 print_iface(char letter, const char *iface, const unsigned char *mask,
988 int invert)
989 {
990 unsigned int i;
991
992 if (mask[0] == 0)
993 return;
994
995 printf("%s -%c ", invert ? " !" : "", letter);
996
997 for (i = 0; i < IFNAMSIZ; i++) {
998 if (mask[i] != 0) {
999 if (iface[i] != '\0')
1000 printf("%c", iface[i]);
1001 } else {
1002 /* we can access iface[i-1] here, because
1003 * a few lines above we make sure that mask[0] != 0 */
1004 if (iface[i-1] != '\0')
1005 printf("+");
1006 break;
1007 }
1008 }
1009 }
1010
1011 /* The ip6tables looks up the /etc/protocols. */
print_proto(uint16_t proto,int invert)1012 static void print_proto(uint16_t proto, int invert)
1013 {
1014 if (proto) {
1015 unsigned int i;
1016 const char *invertstr = invert ? " !" : "";
1017
1018 const struct protoent *pent = getprotobynumber(proto);
1019 if (pent) {
1020 printf("%s -p %s",
1021 invertstr, pent->p_name);
1022 return;
1023 }
1024
1025 for (i = 0; xtables_chain_protos[i].name != NULL; ++i)
1026 if (xtables_chain_protos[i].num == proto) {
1027 printf("%s -p %s",
1028 invertstr, xtables_chain_protos[i].name);
1029 return;
1030 }
1031
1032 printf("%s -p %u", invertstr, proto);
1033 }
1034 }
1035
print_match_save(const struct ip6t_entry_match * e,const struct ip6t_ip6 * ip)1036 static int print_match_save(const struct ip6t_entry_match *e,
1037 const struct ip6t_ip6 *ip)
1038 {
1039 const struct xtables_match *match =
1040 xtables_find_match(e->u.user.name, XTF_TRY_LOAD, NULL);
1041
1042 if (match) {
1043 printf(" -m %s", e->u.user.name);
1044
1045 /* some matches don't provide a save function */
1046 if (match->save)
1047 match->save(ip, e);
1048 } else {
1049 if (e->u.match_size) {
1050 fprintf(stderr,
1051 "Can't find library for match `%s'\n",
1052 e->u.user.name);
1053 exit(1);
1054 }
1055 }
1056 return 0;
1057 }
1058
1059 /* print a given ip including mask if neccessary */
print_ip(const char * prefix,const struct in6_addr * ip,const struct in6_addr * mask,int invert)1060 static void print_ip(const char *prefix, const struct in6_addr *ip,
1061 const struct in6_addr *mask, int invert)
1062 {
1063 char buf[51];
1064 int l = ipv6_prefix_length(mask);
1065
1066 if (l == 0 && !invert)
1067 return;
1068
1069 printf("%s %s %s",
1070 invert ? " !" : "",
1071 prefix,
1072 inet_ntop(AF_INET6, ip, buf, sizeof buf));
1073
1074 if (l == -1)
1075 printf("/%s", inet_ntop(AF_INET6, mask, buf, sizeof buf));
1076 else
1077 printf("/%d", l);
1078 }
1079
1080 /* We want this to be readable, so only print out neccessary fields.
1081 * Because that's the kind of world I want to live in. */
print_rule6(const struct ip6t_entry * e,struct ip6tc_handle * h,const char * chain,int counters)1082 void print_rule6(const struct ip6t_entry *e,
1083 struct ip6tc_handle *h, const char *chain, int counters)
1084 {
1085 const struct ip6t_entry_target *t;
1086 const char *target_name;
1087
1088 /* print counters for iptables-save */
1089 if (counters > 0)
1090 printf("[%llu:%llu] ", (unsigned long long)e->counters.pcnt, (unsigned long long)e->counters.bcnt);
1091
1092 /* print chain name */
1093 printf("-A %s", chain);
1094
1095 /* Print IP part. */
1096 print_ip("-s", &(e->ipv6.src), &(e->ipv6.smsk),
1097 e->ipv6.invflags & IP6T_INV_SRCIP);
1098
1099 print_ip("-d", &(e->ipv6.dst), &(e->ipv6.dmsk),
1100 e->ipv6.invflags & IP6T_INV_DSTIP);
1101
1102 print_iface('i', e->ipv6.iniface, e->ipv6.iniface_mask,
1103 e->ipv6.invflags & IP6T_INV_VIA_IN);
1104
1105 print_iface('o', e->ipv6.outiface, e->ipv6.outiface_mask,
1106 e->ipv6.invflags & IP6T_INV_VIA_OUT);
1107
1108 print_proto(e->ipv6.proto, e->ipv6.invflags & IP6T_INV_PROTO);
1109
1110 #if 0
1111 /* not definied in ipv6
1112 * FIXME: linux/netfilter_ipv6/ip6_tables: IP6T_INV_FRAG why definied? */
1113 if (e->ipv6.flags & IPT_F_FRAG)
1114 printf("%s -f",
1115 e->ipv6.invflags & IP6T_INV_FRAG ? " !" : "");
1116 #endif
1117
1118 if (e->ipv6.flags & IP6T_F_TOS)
1119 printf("%s -? %d",
1120 e->ipv6.invflags & IP6T_INV_TOS ? " !" : "",
1121 e->ipv6.tos);
1122
1123 /* Print matchinfo part */
1124 if (e->target_offset) {
1125 IP6T_MATCH_ITERATE(e, print_match_save, &e->ipv6);
1126 }
1127
1128 /* print counters for iptables -R */
1129 if (counters < 0)
1130 printf(" -c %llu %llu", (unsigned long long)e->counters.pcnt, (unsigned long long)e->counters.bcnt);
1131
1132 /* Print target name */
1133 target_name = ip6tc_get_target(e, h);
1134 if (target_name && (*target_name != '\0'))
1135 #ifdef IP6T_F_GOTO
1136 printf(" -%c %s", e->ipv6.flags & IP6T_F_GOTO ? 'g' : 'j', target_name);
1137 #else
1138 printf(" -j %s", target_name);
1139 #endif
1140
1141 /* Print targinfo part */
1142 t = ip6t_get_target((struct ip6t_entry *)e);
1143 if (t->u.user.name[0]) {
1144 struct xtables_target *target =
1145 xtables_find_target(t->u.user.name, XTF_TRY_LOAD);
1146
1147 if (!target) {
1148 fprintf(stderr, "Can't find library for target `%s'\n",
1149 t->u.user.name);
1150 exit(1);
1151 }
1152
1153 if (target->save)
1154 target->save(&e->ipv6, t);
1155 else {
1156 /* If the target size is greater than ip6t_entry_target
1157 * there is something to be saved, we just don't know
1158 * how to print it */
1159 if (t->u.target_size !=
1160 sizeof(struct ip6t_entry_target)) {
1161 fprintf(stderr, "Target `%s' is missing "
1162 "save function\n",
1163 t->u.user.name);
1164 exit(1);
1165 }
1166 }
1167 }
1168 printf("\n");
1169 }
1170
1171 static int
list_rules(const ip6t_chainlabel chain,int rulenum,int counters,struct ip6tc_handle * handle)1172 list_rules(const ip6t_chainlabel chain, int rulenum, int counters,
1173 struct ip6tc_handle *handle)
1174 {
1175 const char *this = NULL;
1176 int found = 0;
1177
1178 if (counters)
1179 counters = -1; /* iptables -c format */
1180
1181 /* Dump out chain names first,
1182 * thereby preventing dependency conflicts */
1183 if (!rulenum) for (this = ip6tc_first_chain(handle);
1184 this;
1185 this = ip6tc_next_chain(handle)) {
1186 if (chain && strcmp(this, chain) != 0)
1187 continue;
1188
1189 if (ip6tc_builtin(this, handle)) {
1190 struct ip6t_counters count;
1191 printf("-P %s %s", this, ip6tc_get_policy(this, &count, handle));
1192 if (counters)
1193 printf(" -c %llu %llu", (unsigned long long)count.pcnt, (unsigned long long)count.bcnt);
1194 printf("\n");
1195 } else {
1196 printf("-N %s\n", this);
1197 }
1198 }
1199
1200 for (this = ip6tc_first_chain(handle);
1201 this;
1202 this = ip6tc_next_chain(handle)) {
1203 const struct ip6t_entry *e;
1204 int num = 0;
1205
1206 if (chain && strcmp(this, chain) != 0)
1207 continue;
1208
1209 /* Dump out rules */
1210 e = ip6tc_first_rule(this, handle);
1211 while(e) {
1212 num++;
1213 if (!rulenum || num == rulenum)
1214 print_rule6(e, handle, this, counters);
1215 e = ip6tc_next_rule(e, handle);
1216 }
1217 found = 1;
1218 }
1219
1220 errno = ENOENT;
1221 return found;
1222 }
1223
1224 static struct ip6t_entry *
generate_entry(const struct ip6t_entry * fw,struct xtables_rule_match * matches,struct ip6t_entry_target * target)1225 generate_entry(const struct ip6t_entry *fw,
1226 struct xtables_rule_match *matches,
1227 struct ip6t_entry_target *target)
1228 {
1229 unsigned int size;
1230 struct xtables_rule_match *matchp;
1231 struct ip6t_entry *e;
1232
1233 size = sizeof(struct ip6t_entry);
1234 for (matchp = matches; matchp; matchp = matchp->next)
1235 size += matchp->match->m->u.match_size;
1236
1237 e = xtables_malloc(size + target->u.target_size);
1238 *e = *fw;
1239 e->target_offset = size;
1240 e->next_offset = size + target->u.target_size;
1241
1242 size = 0;
1243 for (matchp = matches; matchp; matchp = matchp->next) {
1244 memcpy(e->elems + size, matchp->match->m, matchp->match->m->u.match_size);
1245 size += matchp->match->m->u.match_size;
1246 }
1247 memcpy(e->elems + size, target, target->u.target_size);
1248
1249 return e;
1250 }
1251
clear_rule_matches(struct xtables_rule_match ** matches)1252 static void clear_rule_matches(struct xtables_rule_match **matches)
1253 {
1254 struct xtables_rule_match *matchp, *tmp;
1255
1256 for (matchp = *matches; matchp;) {
1257 tmp = matchp->next;
1258 if (matchp->match->m) {
1259 free(matchp->match->m);
1260 matchp->match->m = NULL;
1261 }
1262 if (matchp->match == matchp->match->next) {
1263 free(matchp->match);
1264 matchp->match = NULL;
1265 }
1266 free(matchp);
1267 matchp = tmp;
1268 }
1269
1270 *matches = NULL;
1271 }
1272
command_jump(struct iptables_command_state * cs)1273 static void command_jump(struct iptables_command_state *cs)
1274 {
1275 size_t size;
1276
1277 set_option(&cs->options, OPT_JUMP, &cs->fw6.ipv6.invflags, cs->invert);
1278 cs->jumpto = parse_target(optarg);
1279 /* TRY_LOAD (may be chain name) */
1280 cs->target = xtables_find_target(cs->jumpto, XTF_TRY_LOAD);
1281
1282 if (cs->target == NULL)
1283 return;
1284
1285 size = XT_ALIGN(sizeof(struct ip6t_entry_target)) + cs->target->size;
1286
1287 cs->target->t = xtables_calloc(1, size);
1288 cs->target->t->u.target_size = size;
1289 strcpy(cs->target->t->u.user.name, cs->jumpto);
1290 cs->target->t->u.user.revision = cs->target->revision;
1291 if (cs->target->init != NULL)
1292 cs->target->init(cs->target->t);
1293 if (cs->target->x6_options != NULL)
1294 opts = xtables_options_xfrm(ip6tables_globals.orig_opts, opts,
1295 cs->target->x6_options,
1296 &cs->target->option_offset);
1297 else
1298 opts = xtables_merge_options(ip6tables_globals.orig_opts, opts,
1299 cs->target->extra_opts,
1300 &cs->target->option_offset);
1301 if (opts == NULL)
1302 xtables_error(OTHER_PROBLEM, "can't alloc memory!");
1303 }
1304
command_match(struct iptables_command_state * cs)1305 static void command_match(struct iptables_command_state *cs)
1306 {
1307 struct xtables_match *m;
1308 size_t size;
1309
1310 if (cs->invert)
1311 xtables_error(PARAMETER_PROBLEM,
1312 "unexpected ! flag before --match");
1313
1314 m = xtables_find_match(optarg, XTF_LOAD_MUST_SUCCEED, &cs->matches);
1315 size = XT_ALIGN(sizeof(struct ip6t_entry_match)) + m->size;
1316 m->m = xtables_calloc(1, size);
1317 m->m->u.match_size = size;
1318 strcpy(m->m->u.user.name, m->name);
1319 m->m->u.user.revision = m->revision;
1320 if (m->init != NULL)
1321 m->init(m->m);
1322 if (m == m->next)
1323 return;
1324 /* Merge options for non-cloned matches */
1325 if (m->x6_options != NULL)
1326 opts = xtables_options_xfrm(ip6tables_globals.orig_opts, opts,
1327 m->x6_options, &m->option_offset);
1328 else if (m->extra_opts != NULL)
1329 opts = xtables_merge_options(ip6tables_globals.orig_opts, opts,
1330 m->extra_opts, &m->option_offset);
1331 }
1332
do_command6(int argc,char * argv[],char ** table,struct ip6tc_handle ** handle)1333 int do_command6(int argc, char *argv[], char **table, struct ip6tc_handle **handle)
1334 {
1335 struct iptables_command_state cs;
1336 struct ip6t_entry *e = NULL;
1337 unsigned int nsaddrs = 0, ndaddrs = 0;
1338 struct in6_addr *saddrs = NULL, *daddrs = NULL;
1339 struct in6_addr *smasks = NULL, *dmasks = NULL;
1340
1341 int verbose = 0;
1342 const char *chain = NULL;
1343 const char *shostnetworkmask = NULL, *dhostnetworkmask = NULL;
1344 const char *policy = NULL, *newname = NULL;
1345 unsigned int rulenum = 0, command = 0;
1346 const char *pcnt = NULL, *bcnt = NULL;
1347 int ret = 1;
1348 struct xtables_match *m;
1349 struct xtables_rule_match *matchp;
1350 struct xtables_target *t;
1351 unsigned long long cnt;
1352
1353 memset(&cs, 0, sizeof(cs));
1354 cs.jumpto = "";
1355 cs.argv = argv;
1356
1357 /* re-set optind to 0 in case do_command6 gets called
1358 * a second time */
1359 optind = 0;
1360
1361 /* clear mflags in case do_command6 gets called a second time
1362 * (we clear the global list of all matches for security)*/
1363 for (m = xtables_matches; m; m = m->next)
1364 m->mflags = 0;
1365
1366 for (t = xtables_targets; t; t = t->next) {
1367 t->tflags = 0;
1368 t->used = 0;
1369 }
1370
1371 /* Suppress error messages: we may add new options if we
1372 demand-load a protocol. */
1373 opterr = 0;
1374
1375 opts = xt_params->orig_opts;
1376 while ((cs.c = getopt_long(argc, argv,
1377 "-:A:C:D:R:I:L::S::M:F::Z::N:X::E:P:Vh::o:p:s:d:j:i:bvnt:m:xc:g:46",
1378 opts, NULL)) != -1) {
1379 switch (cs.c) {
1380 /*
1381 * Command selection
1382 */
1383 case 'A':
1384 add_command(&command, CMD_APPEND, CMD_NONE,
1385 cs.invert);
1386 chain = optarg;
1387 break;
1388
1389 case 'C':
1390 add_command(&command, CMD_CHECK, CMD_NONE,
1391 cs.invert);
1392 chain = optarg;
1393 break;
1394
1395 case 'D':
1396 add_command(&command, CMD_DELETE, CMD_NONE,
1397 cs.invert);
1398 chain = optarg;
1399 if (optind < argc && argv[optind][0] != '-'
1400 && argv[optind][0] != '!') {
1401 rulenum = parse_rulenumber(argv[optind++]);
1402 command = CMD_DELETE_NUM;
1403 }
1404 break;
1405
1406 case 'R':
1407 add_command(&command, CMD_REPLACE, CMD_NONE,
1408 cs.invert);
1409 chain = optarg;
1410 if (optind < argc && argv[optind][0] != '-'
1411 && argv[optind][0] != '!')
1412 rulenum = parse_rulenumber(argv[optind++]);
1413 else
1414 xtables_error(PARAMETER_PROBLEM,
1415 "-%c requires a rule number",
1416 cmd2char(CMD_REPLACE));
1417 break;
1418
1419 case 'I':
1420 add_command(&command, CMD_INSERT, CMD_NONE,
1421 cs.invert);
1422 chain = optarg;
1423 if (optind < argc && argv[optind][0] != '-'
1424 && argv[optind][0] != '!')
1425 rulenum = parse_rulenumber(argv[optind++]);
1426 else rulenum = 1;
1427 break;
1428
1429 case 'L':
1430 add_command(&command, CMD_LIST,
1431 CMD_ZERO | CMD_ZERO_NUM, cs.invert);
1432 if (optarg) chain = optarg;
1433 else if (optind < argc && argv[optind][0] != '-'
1434 && argv[optind][0] != '!')
1435 chain = argv[optind++];
1436 if (optind < argc && argv[optind][0] != '-'
1437 && argv[optind][0] != '!')
1438 rulenum = parse_rulenumber(argv[optind++]);
1439 break;
1440
1441 case 'S':
1442 add_command(&command, CMD_LIST_RULES,
1443 CMD_ZERO | CMD_ZERO_NUM, cs.invert);
1444 if (optarg) chain = optarg;
1445 else if (optind < argc && argv[optind][0] != '-'
1446 && argv[optind][0] != '!')
1447 chain = argv[optind++];
1448 if (optind < argc && argv[optind][0] != '-'
1449 && argv[optind][0] != '!')
1450 rulenum = parse_rulenumber(argv[optind++]);
1451 break;
1452
1453 case 'F':
1454 add_command(&command, CMD_FLUSH, CMD_NONE,
1455 cs.invert);
1456 if (optarg) chain = optarg;
1457 else if (optind < argc && argv[optind][0] != '-'
1458 && argv[optind][0] != '!')
1459 chain = argv[optind++];
1460 break;
1461
1462 case 'Z':
1463 add_command(&command, CMD_ZERO, CMD_LIST|CMD_LIST_RULES,
1464 cs.invert);
1465 if (optarg) chain = optarg;
1466 else if (optind < argc && argv[optind][0] != '-'
1467 && argv[optind][0] != '!')
1468 chain = argv[optind++];
1469 if (optind < argc && argv[optind][0] != '-'
1470 && argv[optind][0] != '!') {
1471 rulenum = parse_rulenumber(argv[optind++]);
1472 command = CMD_ZERO_NUM;
1473 }
1474 break;
1475
1476 case 'N':
1477 if (optarg && (*optarg == '-' || *optarg == '!'))
1478 xtables_error(PARAMETER_PROBLEM,
1479 "chain name not allowed to start "
1480 "with `%c'\n", *optarg);
1481 if (xtables_find_target(optarg, XTF_TRY_LOAD))
1482 xtables_error(PARAMETER_PROBLEM,
1483 "chain name may not clash "
1484 "with target name\n");
1485 add_command(&command, CMD_NEW_CHAIN, CMD_NONE,
1486 cs.invert);
1487 chain = optarg;
1488 break;
1489
1490 case 'X':
1491 add_command(&command, CMD_DELETE_CHAIN, CMD_NONE,
1492 cs.invert);
1493 if (optarg) chain = optarg;
1494 else if (optind < argc && argv[optind][0] != '-'
1495 && argv[optind][0] != '!')
1496 chain = argv[optind++];
1497 break;
1498
1499 case 'E':
1500 add_command(&command, CMD_RENAME_CHAIN, CMD_NONE,
1501 cs.invert);
1502 chain = optarg;
1503 if (optind < argc && argv[optind][0] != '-'
1504 && argv[optind][0] != '!')
1505 newname = argv[optind++];
1506 else
1507 xtables_error(PARAMETER_PROBLEM,
1508 "-%c requires old-chain-name and "
1509 "new-chain-name",
1510 cmd2char(CMD_RENAME_CHAIN));
1511 break;
1512
1513 case 'P':
1514 add_command(&command, CMD_SET_POLICY, CMD_NONE,
1515 cs.invert);
1516 chain = optarg;
1517 if (optind < argc && argv[optind][0] != '-'
1518 && argv[optind][0] != '!')
1519 policy = argv[optind++];
1520 else
1521 xtables_error(PARAMETER_PROBLEM,
1522 "-%c requires a chain and a policy",
1523 cmd2char(CMD_SET_POLICY));
1524 break;
1525
1526 case 'h':
1527 if (!optarg)
1528 optarg = argv[optind];
1529
1530 /* ip6tables -p icmp -h */
1531 if (!cs.matches && cs.protocol)
1532 xtables_find_match(cs.protocol, XTF_TRY_LOAD,
1533 &cs.matches);
1534
1535 exit_printhelp(cs.matches);
1536
1537 /*
1538 * Option selection
1539 */
1540 case 'p':
1541 xtables_check_inverse(optarg, &cs.invert, &optind, argc, argv);
1542 set_option(&cs.options, OPT_PROTOCOL, &cs.fw6.ipv6.invflags,
1543 cs.invert);
1544
1545 /* Canonicalize into lower case */
1546 for (cs.protocol = optarg; *cs.protocol; cs.protocol++)
1547 *cs.protocol = tolower(*cs.protocol);
1548
1549 cs.protocol = optarg;
1550 cs.fw6.ipv6.proto = xtables_parse_protocol(cs.protocol);
1551 cs.fw6.ipv6.flags |= IP6T_F_PROTO;
1552
1553 if (cs.fw6.ipv6.proto == 0
1554 && (cs.fw6.ipv6.invflags & IP6T_INV_PROTO))
1555 xtables_error(PARAMETER_PROBLEM,
1556 "rule would never match protocol");
1557
1558 if (is_exthdr(cs.fw6.ipv6.proto)
1559 && (cs.fw6.ipv6.invflags & IP6T_INV_PROTO) == 0)
1560 fprintf(stderr,
1561 "Warning: never matched protocol: %s. "
1562 "use extension match instead.\n",
1563 cs.protocol);
1564 break;
1565
1566 case 's':
1567 xtables_check_inverse(optarg, &cs.invert, &optind, argc, argv);
1568 set_option(&cs.options, OPT_SOURCE, &cs.fw6.ipv6.invflags,
1569 cs.invert);
1570 shostnetworkmask = optarg;
1571 break;
1572
1573 case 'd':
1574 xtables_check_inverse(optarg, &cs.invert, &optind, argc, argv);
1575 set_option(&cs.options, OPT_DESTINATION, &cs.fw6.ipv6.invflags,
1576 cs.invert);
1577 dhostnetworkmask = optarg;
1578 break;
1579
1580 #ifdef IP6T_F_GOTO
1581 case 'g':
1582 set_option(&cs.options, OPT_JUMP, &cs.fw6.ipv6.invflags,
1583 cs.invert);
1584 cs.fw6.ipv6.flags |= IP6T_F_GOTO;
1585 cs.jumpto = parse_target(optarg);
1586 break;
1587 #endif
1588
1589 case 'j':
1590 command_jump(&cs);
1591 break;
1592
1593
1594 case 'i':
1595 if (*optarg == '\0')
1596 xtables_error(PARAMETER_PROBLEM,
1597 "Empty interface is likely to be "
1598 "undesired");
1599 xtables_check_inverse(optarg, &cs.invert, &optind, argc, argv);
1600 set_option(&cs.options, OPT_VIANAMEIN, &cs.fw6.ipv6.invflags,
1601 cs.invert);
1602 xtables_parse_interface(optarg,
1603 cs.fw6.ipv6.iniface,
1604 cs.fw6.ipv6.iniface_mask);
1605 break;
1606
1607 case 'o':
1608 if (*optarg == '\0')
1609 xtables_error(PARAMETER_PROBLEM,
1610 "Empty interface is likely to be "
1611 "undesired");
1612 xtables_check_inverse(optarg, &cs.invert, &optind, argc, argv);
1613 set_option(&cs.options, OPT_VIANAMEOUT, &cs.fw6.ipv6.invflags,
1614 cs.invert);
1615 xtables_parse_interface(optarg,
1616 cs.fw6.ipv6.outiface,
1617 cs.fw6.ipv6.outiface_mask);
1618 break;
1619
1620 case 'v':
1621 if (!verbose)
1622 set_option(&cs.options, OPT_VERBOSE,
1623 &cs.fw6.ipv6.invflags, cs.invert);
1624 verbose++;
1625 break;
1626
1627 case 'm':
1628 command_match(&cs);
1629 break;
1630
1631 case 'n':
1632 set_option(&cs.options, OPT_NUMERIC, &cs.fw6.ipv6.invflags,
1633 cs.invert);
1634 break;
1635
1636 case 't':
1637 if (cs.invert)
1638 xtables_error(PARAMETER_PROBLEM,
1639 "unexpected ! flag before --table");
1640 *table = optarg;
1641 break;
1642
1643 case 'x':
1644 set_option(&cs.options, OPT_EXPANDED, &cs.fw6.ipv6.invflags,
1645 cs.invert);
1646 break;
1647
1648 case 'V':
1649 if (cs.invert)
1650 printf("Not %s ;-)\n", prog_vers);
1651 else
1652 printf("%s v%s\n",
1653 prog_name, prog_vers);
1654 exit(0);
1655
1656 case '0':
1657 set_option(&cs.options, OPT_LINENUMBERS, &cs.fw6.ipv6.invflags,
1658 cs.invert);
1659 break;
1660
1661 case 'M':
1662 xtables_modprobe_program = optarg;
1663 break;
1664
1665 case 'c':
1666
1667 set_option(&cs.options, OPT_COUNTERS, &cs.fw6.ipv6.invflags,
1668 cs.invert);
1669 pcnt = optarg;
1670 bcnt = strchr(pcnt + 1, ',');
1671 if (bcnt)
1672 bcnt++;
1673 if (!bcnt && optind < argc && argv[optind][0] != '-'
1674 && argv[optind][0] != '!')
1675 bcnt = argv[optind++];
1676 if (!bcnt)
1677 xtables_error(PARAMETER_PROBLEM,
1678 "-%c requires packet and byte counter",
1679 opt2char(OPT_COUNTERS));
1680
1681 if (sscanf(pcnt, "%llu", &cnt) != 1)
1682 xtables_error(PARAMETER_PROBLEM,
1683 "-%c packet counter not numeric",
1684 opt2char(OPT_COUNTERS));
1685 cs.fw6.counters.pcnt = cnt;
1686
1687 if (sscanf(bcnt, "%llu", &cnt) != 1)
1688 xtables_error(PARAMETER_PROBLEM,
1689 "-%c byte counter not numeric",
1690 opt2char(OPT_COUNTERS));
1691 cs.fw6.counters.bcnt = cnt;
1692 break;
1693
1694 case '4':
1695 /* This is not the IPv4 iptables */
1696 if (line != -1)
1697 return 1; /* success: line ignored */
1698 fprintf(stderr, "This is the IPv6 version of ip6tables.\n");
1699 exit_tryhelp(2);
1700
1701 case '6':
1702 /* This is indeed the IPv6 ip6tables */
1703 break;
1704
1705 case 1: /* non option */
1706 if (optarg[0] == '!' && optarg[1] == '\0') {
1707 if (cs.invert)
1708 xtables_error(PARAMETER_PROBLEM,
1709 "multiple consecutive ! not"
1710 " allowed");
1711 cs.invert = TRUE;
1712 optarg[0] = '\0';
1713 continue;
1714 }
1715 fprintf(stderr, "Bad argument `%s'\n", optarg);
1716 exit_tryhelp(2);
1717
1718 default:
1719 if (command_default(&cs, &ip6tables_globals) == 1)
1720 /*
1721 * If new options were loaded, we must retry
1722 * getopt immediately and not allow
1723 * cs.invert=FALSE to be executed.
1724 */
1725 continue;
1726 break;
1727 }
1728 cs.invert = FALSE;
1729 }
1730
1731 for (matchp = cs.matches; matchp; matchp = matchp->next)
1732 xtables_option_mfcall(matchp->match);
1733 if (cs.target != NULL)
1734 xtables_option_tfcall(cs.target);
1735
1736 /* Fix me: must put inverse options checking here --MN */
1737
1738 if (optind < argc)
1739 xtables_error(PARAMETER_PROBLEM,
1740 "unknown arguments found on commandline");
1741 if (!command)
1742 xtables_error(PARAMETER_PROBLEM, "no command specified");
1743 if (cs.invert)
1744 xtables_error(PARAMETER_PROBLEM,
1745 "nothing appropriate following !");
1746
1747 if (command & (CMD_REPLACE | CMD_INSERT | CMD_DELETE | CMD_APPEND | CMD_CHECK)) {
1748 if (!(cs.options & OPT_DESTINATION))
1749 dhostnetworkmask = "::0/0";
1750 if (!(cs.options & OPT_SOURCE))
1751 shostnetworkmask = "::0/0";
1752 }
1753
1754 if (shostnetworkmask)
1755 xtables_ip6parse_multiple(shostnetworkmask, &saddrs,
1756 &smasks, &nsaddrs);
1757
1758 if (dhostnetworkmask)
1759 xtables_ip6parse_multiple(dhostnetworkmask, &daddrs,
1760 &dmasks, &ndaddrs);
1761
1762 if ((nsaddrs > 1 || ndaddrs > 1) &&
1763 (cs.fw6.ipv6.invflags & (IP6T_INV_SRCIP | IP6T_INV_DSTIP)))
1764 xtables_error(PARAMETER_PROBLEM, "! not allowed with multiple"
1765 " source or destination IP addresses");
1766
1767 if (command == CMD_REPLACE && (nsaddrs != 1 || ndaddrs != 1))
1768 xtables_error(PARAMETER_PROBLEM, "Replacement rule does not "
1769 "specify a unique address");
1770
1771 generic_opt_check(command, cs.options);
1772
1773 if (chain != NULL && strlen(chain) >= XT_EXTENSION_MAXNAMELEN)
1774 xtables_error(PARAMETER_PROBLEM,
1775 "chain name `%s' too long (must be under %u chars)",
1776 chain, XT_EXTENSION_MAXNAMELEN);
1777
1778 /* only allocate handle if we weren't called with a handle */
1779 if (!*handle)
1780 *handle = ip6tc_init(*table);
1781
1782 /* try to insmod the module if iptc_init failed */
1783 if (!*handle && xtables_load_ko(xtables_modprobe_program, false) != -1)
1784 *handle = ip6tc_init(*table);
1785
1786 if (!*handle)
1787 xtables_error(VERSION_PROBLEM,
1788 "can't initialize ip6tables table `%s': %s",
1789 *table, ip6tc_strerror(errno));
1790
1791 if (command == CMD_APPEND
1792 || command == CMD_DELETE
1793 || command == CMD_CHECK
1794 || command == CMD_INSERT
1795 || command == CMD_REPLACE) {
1796 if (strcmp(chain, "PREROUTING") == 0
1797 || strcmp(chain, "INPUT") == 0) {
1798 /* -o not valid with incoming packets. */
1799 if (cs.options & OPT_VIANAMEOUT)
1800 xtables_error(PARAMETER_PROBLEM,
1801 "Can't use -%c with %s\n",
1802 opt2char(OPT_VIANAMEOUT),
1803 chain);
1804 }
1805
1806 if (strcmp(chain, "POSTROUTING") == 0
1807 || strcmp(chain, "OUTPUT") == 0) {
1808 /* -i not valid with outgoing packets */
1809 if (cs.options & OPT_VIANAMEIN)
1810 xtables_error(PARAMETER_PROBLEM,
1811 "Can't use -%c with %s\n",
1812 opt2char(OPT_VIANAMEIN),
1813 chain);
1814 }
1815
1816 if (cs.target && ip6tc_is_chain(cs.jumpto, *handle)) {
1817 fprintf(stderr,
1818 "Warning: using chain %s, not extension\n",
1819 cs.jumpto);
1820
1821 if (cs.target->t)
1822 free(cs.target->t);
1823
1824 cs.target = NULL;
1825 }
1826
1827 /* If they didn't specify a target, or it's a chain
1828 name, use standard. */
1829 if (!cs.target
1830 && (strlen(cs.jumpto) == 0
1831 || ip6tc_is_chain(cs.jumpto, *handle))) {
1832 size_t size;
1833
1834 cs.target = xtables_find_target(IP6T_STANDARD_TARGET,
1835 XTF_LOAD_MUST_SUCCEED);
1836
1837 size = sizeof(struct ip6t_entry_target)
1838 + cs.target->size;
1839 cs.target->t = xtables_calloc(1, size);
1840 cs.target->t->u.target_size = size;
1841 strcpy(cs.target->t->u.user.name, cs.jumpto);
1842 if (cs.target->init != NULL)
1843 cs.target->init(cs.target->t);
1844 }
1845
1846 if (!cs.target) {
1847 /* it is no chain, and we can't load a plugin.
1848 * We cannot know if the plugin is corrupt, non
1849 * existant OR if the user just misspelled a
1850 * chain. */
1851 #ifdef IP6T_F_GOTO
1852 if (cs.fw6.ipv6.flags & IP6T_F_GOTO)
1853 xtables_error(PARAMETER_PROBLEM,
1854 "goto '%s' is not a chain\n",
1855 cs.jumpto);
1856 #endif
1857 xtables_find_target(cs.jumpto, XTF_LOAD_MUST_SUCCEED);
1858 } else {
1859 e = generate_entry(&cs.fw6, cs.matches, cs.target->t);
1860 free(cs.target->t);
1861 }
1862 }
1863
1864 switch (command) {
1865 case CMD_APPEND:
1866 ret = append_entry(chain, e,
1867 nsaddrs, saddrs, smasks,
1868 ndaddrs, daddrs, dmasks,
1869 cs.options&OPT_VERBOSE,
1870 *handle);
1871 break;
1872 case CMD_DELETE:
1873 ret = delete_entry(chain, e,
1874 nsaddrs, saddrs, smasks,
1875 ndaddrs, daddrs, dmasks,
1876 cs.options&OPT_VERBOSE,
1877 *handle, cs.matches, cs.target);
1878 break;
1879 case CMD_DELETE_NUM:
1880 ret = ip6tc_delete_num_entry(chain, rulenum - 1, *handle);
1881 break;
1882 case CMD_CHECK:
1883 ret = check_entry(chain, e,
1884 nsaddrs, saddrs, smasks,
1885 ndaddrs, daddrs, dmasks,
1886 cs.options&OPT_VERBOSE,
1887 *handle, cs.matches, cs.target);
1888 break;
1889 case CMD_REPLACE:
1890 ret = replace_entry(chain, e, rulenum - 1,
1891 saddrs, smasks, daddrs, dmasks,
1892 cs.options&OPT_VERBOSE, *handle);
1893 break;
1894 case CMD_INSERT:
1895 ret = insert_entry(chain, e, rulenum - 1,
1896 nsaddrs, saddrs, smasks,
1897 ndaddrs, daddrs, dmasks,
1898 cs.options&OPT_VERBOSE,
1899 *handle);
1900 break;
1901 case CMD_FLUSH:
1902 ret = flush_entries6(chain, cs.options&OPT_VERBOSE, *handle);
1903 break;
1904 case CMD_ZERO:
1905 ret = zero_entries(chain, cs.options&OPT_VERBOSE, *handle);
1906 break;
1907 case CMD_ZERO_NUM:
1908 ret = ip6tc_zero_counter(chain, rulenum, *handle);
1909 break;
1910 case CMD_LIST:
1911 case CMD_LIST|CMD_ZERO:
1912 case CMD_LIST|CMD_ZERO_NUM:
1913 ret = list_entries(chain,
1914 rulenum,
1915 cs.options&OPT_VERBOSE,
1916 cs.options&OPT_NUMERIC,
1917 cs.options&OPT_EXPANDED,
1918 cs.options&OPT_LINENUMBERS,
1919 *handle);
1920 if (ret && (command & CMD_ZERO))
1921 ret = zero_entries(chain,
1922 cs.options&OPT_VERBOSE, *handle);
1923 if (ret && (command & CMD_ZERO_NUM))
1924 ret = ip6tc_zero_counter(chain, rulenum, *handle);
1925 break;
1926 case CMD_LIST_RULES:
1927 case CMD_LIST_RULES|CMD_ZERO:
1928 case CMD_LIST_RULES|CMD_ZERO_NUM:
1929 ret = list_rules(chain,
1930 rulenum,
1931 cs.options&OPT_VERBOSE,
1932 *handle);
1933 if (ret && (command & CMD_ZERO))
1934 ret = zero_entries(chain,
1935 cs.options&OPT_VERBOSE, *handle);
1936 if (ret && (command & CMD_ZERO_NUM))
1937 ret = ip6tc_zero_counter(chain, rulenum, *handle);
1938 break;
1939 case CMD_NEW_CHAIN:
1940 ret = ip6tc_create_chain(chain, *handle);
1941 break;
1942 case CMD_DELETE_CHAIN:
1943 ret = delete_chain6(chain, cs.options&OPT_VERBOSE, *handle);
1944 break;
1945 case CMD_RENAME_CHAIN:
1946 ret = ip6tc_rename_chain(chain, newname, *handle);
1947 break;
1948 case CMD_SET_POLICY:
1949 ret = ip6tc_set_policy(chain, policy, cs.options&OPT_COUNTERS ? &cs.fw6.counters : NULL, *handle);
1950 break;
1951 default:
1952 /* We should never reach this... */
1953 exit_tryhelp(2);
1954 }
1955
1956 if (verbose > 1)
1957 dump_entries6(*handle);
1958
1959 clear_rule_matches(&cs.matches);
1960
1961 if (e != NULL) {
1962 free(e);
1963 e = NULL;
1964 }
1965
1966 free(saddrs);
1967 free(smasks);
1968 free(daddrs);
1969 free(dmasks);
1970 xtables_free_opts(1);
1971
1972 return ret;
1973 }
1974