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